2 * linux/drivers/char/synclink.c
4 * $Id: synclink.c,v 4.38 2005/11/07 16:30:34 paulkf Exp $
6 * Device driver for Microgate SyncLink ISA and PCI
7 * high speed multiprotocol serial adapters.
9 * written by Paul Fulghum for Microgate Corporation
10 * paulkf@microgate.com
12 * Microgate and SyncLink are trademarks of Microgate Corporation
14 * Derived from serial.c written by Theodore Ts'o and Linus Torvalds
16 * Original release 01/11/99
18 * This code is released under the GNU General Public License (GPL)
20 * This driver is primarily intended for use in synchronous
21 * HDLC mode. Asynchronous mode is also provided.
23 * When operating in synchronous mode, each call to mgsl_write()
24 * contains exactly one complete HDLC frame. Calling mgsl_put_char
25 * will start assembling an HDLC frame that will not be sent until
26 * mgsl_flush_chars or mgsl_write is called.
28 * Synchronous receive data is reported as complete frames. To accomplish
29 * this, the TTY flip buffer is bypassed (too small to hold largest
30 * frame and may fragment frames) and the line discipline
31 * receive entry point is called directly.
33 * This driver has been tested with a slightly modified ppp.c driver
34 * for synchronous PPP.
37 * Added interface for syncppp.c driver (an alternate synchronous PPP
38 * implementation that also supports Cisco HDLC). Each device instance
39 * registers as a tty device AND a network device (if dosyncppp option
40 * is set for the device). The functionality is determined by which
41 * device interface is opened.
43 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
44 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
45 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
46 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
47 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
48 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
49 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
50 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
51 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
52 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
53 * OF THE POSSIBILITY OF SUCH DAMAGE.
57 # define BREAKPOINT() asm(" int $3");
59 # define BREAKPOINT() { }
62 #define MAX_ISA_DEVICES 10
63 #define MAX_PCI_DEVICES 10
64 #define MAX_TOTAL_DEVICES 20
66 #include <linux/module.h>
67 #include <linux/errno.h>
68 #include <linux/signal.h>
69 #include <linux/sched.h>
70 #include <linux/timer.h>
71 #include <linux/interrupt.h>
72 #include <linux/pci.h>
73 #include <linux/tty.h>
74 #include <linux/tty_flip.h>
75 #include <linux/serial.h>
76 #include <linux/major.h>
77 #include <linux/string.h>
78 #include <linux/fcntl.h>
79 #include <linux/ptrace.h>
80 #include <linux/ioport.h>
82 #include <linux/slab.h>
83 #include <linux/delay.h>
84 #include <linux/netdevice.h>
85 #include <linux/vmalloc.h>
86 #include <linux/init.h>
87 #include <linux/ioctl.h>
88 #include <linux/synclink.h>
90 #include <asm/system.h>
94 #include <linux/bitops.h>
95 #include <asm/types.h>
96 #include <linux/termios.h>
97 #include <linux/workqueue.h>
98 #include <linux/hdlc.h>
99 #include <linux/dma-mapping.h>
101 #if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINK_MODULE))
102 #define SYNCLINK_GENERIC_HDLC 1
104 #define SYNCLINK_GENERIC_HDLC 0
107 #define GET_USER(error,value,addr) error = get_user(value,addr)
108 #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0
109 #define PUT_USER(error,value,addr) error = put_user(value,addr)
110 #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0
112 #include <asm/uaccess.h>
114 #define RCLRVALUE 0xffff
116 static MGSL_PARAMS default_params = {
117 MGSL_MODE_HDLC, /* unsigned long mode */
118 0, /* unsigned char loopback; */
119 HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */
120 HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */
121 0, /* unsigned long clock_speed; */
122 0xff, /* unsigned char addr_filter; */
123 HDLC_CRC_16_CCITT, /* unsigned short crc_type; */
124 HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */
125 HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */
126 9600, /* unsigned long data_rate; */
127 8, /* unsigned char data_bits; */
128 1, /* unsigned char stop_bits; */
129 ASYNC_PARITY_NONE /* unsigned char parity; */
132 #define SHARED_MEM_ADDRESS_SIZE 0x40000
133 #define BUFFERLISTSIZE 4096
134 #define DMABUFFERSIZE 4096
135 #define MAXRXFRAMES 7
137 typedef struct _DMABUFFERENTRY
139 u32 phys_addr; /* 32-bit flat physical address of data buffer */
140 volatile u16 count; /* buffer size/data count */
141 volatile u16 status; /* Control/status field */
142 volatile u16 rcc; /* character count field */
143 u16 reserved; /* padding required by 16C32 */
144 u32 link; /* 32-bit flat link to next buffer entry */
145 char *virt_addr; /* virtual address of data buffer */
146 u32 phys_entry; /* physical address of this buffer entry */
148 } DMABUFFERENTRY, *DMAPBUFFERENTRY;
150 /* The queue of BH actions to be performed */
153 #define BH_TRANSMIT 2
156 #define IO_PIN_SHUTDOWN_LIMIT 100
158 struct _input_signal_events {
169 /* transmit holding buffer definitions*/
170 #define MAX_TX_HOLDING_BUFFERS 5
171 struct tx_holding_buffer {
173 unsigned char * buffer;
178 * Device instance data structure
184 int count; /* count of opens */
187 unsigned short close_delay;
188 unsigned short closing_wait; /* time to wait before closing */
190 struct mgsl_icount icount;
192 struct tty_struct *tty;
194 int x_char; /* xon/xoff character */
195 int blocked_open; /* # of blocked opens */
196 u16 read_status_mask;
197 u16 ignore_status_mask;
198 unsigned char *xmit_buf;
203 wait_queue_head_t open_wait;
204 wait_queue_head_t close_wait;
206 wait_queue_head_t status_event_wait_q;
207 wait_queue_head_t event_wait_q;
208 struct timer_list tx_timer; /* HDLC transmit timeout timer */
209 struct mgsl_struct *next_device; /* device list link */
211 spinlock_t irq_spinlock; /* spinlock for synchronizing with ISR */
212 struct work_struct task; /* task structure for scheduling bh */
214 u32 EventMask; /* event trigger mask */
215 u32 RecordedEvents; /* pending events */
217 u32 max_frame_size; /* as set by device config */
221 int bh_running; /* Protection from multiple */
225 int dcd_chkcount; /* check counts to prevent */
226 int cts_chkcount; /* too many IRQs if a signal */
227 int dsr_chkcount; /* is floating */
230 char *buffer_list; /* virtual address of Rx & Tx buffer lists */
231 u32 buffer_list_phys;
232 dma_addr_t buffer_list_dma_addr;
234 unsigned int rx_buffer_count; /* count of total allocated Rx buffers */
235 DMABUFFERENTRY *rx_buffer_list; /* list of receive buffer entries */
236 unsigned int current_rx_buffer;
238 int num_tx_dma_buffers; /* number of tx dma frames required */
239 int tx_dma_buffers_used;
240 unsigned int tx_buffer_count; /* count of total allocated Tx buffers */
241 DMABUFFERENTRY *tx_buffer_list; /* list of transmit buffer entries */
242 int start_tx_dma_buffer; /* tx dma buffer to start tx dma operation */
243 int current_tx_buffer; /* next tx dma buffer to be loaded */
245 unsigned char *intermediate_rxbuffer;
247 int num_tx_holding_buffers; /* number of tx holding buffer allocated */
248 int get_tx_holding_index; /* next tx holding buffer for adapter to load */
249 int put_tx_holding_index; /* next tx holding buffer to store user request */
250 int tx_holding_count; /* number of tx holding buffers waiting */
251 struct tx_holding_buffer tx_holding_buffers[MAX_TX_HOLDING_BUFFERS];
264 char device_name[25]; /* device instance name */
266 unsigned int bus_type; /* expansion bus type (ISA,EISA,PCI) */
267 unsigned char bus; /* expansion bus number (zero based) */
268 unsigned char function; /* PCI device number */
270 unsigned int io_base; /* base I/O address of adapter */
271 unsigned int io_addr_size; /* size of the I/O address range */
272 int io_addr_requested; /* nonzero if I/O address requested */
274 unsigned int irq_level; /* interrupt level */
275 unsigned long irq_flags;
276 int irq_requested; /* nonzero if IRQ requested */
278 unsigned int dma_level; /* DMA channel */
279 int dma_requested; /* nonzero if dma channel requested */
285 MGSL_PARAMS params; /* communications parameters */
287 unsigned char serial_signals; /* current serial signal states */
289 int irq_occurred; /* for diagnostics use */
290 unsigned int init_error; /* Initialization startup error (DIAGS) */
291 int fDiagnosticsmode; /* Driver in Diagnostic mode? (DIAGS) */
294 unsigned char* memory_base; /* shared memory address (PCI only) */
295 u32 phys_memory_base;
296 int shared_mem_requested;
298 unsigned char* lcr_base; /* local config registers (PCI only) */
301 int lcr_mem_requested;
304 char flag_buf[MAX_ASYNC_BUFFER_SIZE];
305 char char_buf[MAX_ASYNC_BUFFER_SIZE];
306 BOOLEAN drop_rts_on_tx_done;
308 BOOLEAN loopmode_insert_requested;
309 BOOLEAN loopmode_send_done_requested;
311 struct _input_signal_events input_signal_events;
313 /* generic HDLC device parts */
318 #if SYNCLINK_GENERIC_HDLC
319 struct net_device *netdev;
323 #define MGSL_MAGIC 0x5401
326 * The size of the serial xmit buffer is 1 page, or 4096 bytes
328 #ifndef SERIAL_XMIT_SIZE
329 #define SERIAL_XMIT_SIZE 4096
333 * These macros define the offsets used in calculating the
334 * I/O address of the specified USC registers.
338 #define DCPIN 2 /* Bit 1 of I/O address */
339 #define SDPIN 4 /* Bit 2 of I/O address */
341 #define DCAR 0 /* DMA command/address register */
342 #define CCAR SDPIN /* channel command/address register */
343 #define DATAREG DCPIN + SDPIN /* serial data register */
348 * These macros define the register address (ordinal number)
349 * used for writing address/value pairs to the USC.
352 #define CMR 0x02 /* Channel mode Register */
353 #define CCSR 0x04 /* Channel Command/status Register */
354 #define CCR 0x06 /* Channel Control Register */
355 #define PSR 0x08 /* Port status Register */
356 #define PCR 0x0a /* Port Control Register */
357 #define TMDR 0x0c /* Test mode Data Register */
358 #define TMCR 0x0e /* Test mode Control Register */
359 #define CMCR 0x10 /* Clock mode Control Register */
360 #define HCR 0x12 /* Hardware Configuration Register */
361 #define IVR 0x14 /* Interrupt Vector Register */
362 #define IOCR 0x16 /* Input/Output Control Register */
363 #define ICR 0x18 /* Interrupt Control Register */
364 #define DCCR 0x1a /* Daisy Chain Control Register */
365 #define MISR 0x1c /* Misc Interrupt status Register */
366 #define SICR 0x1e /* status Interrupt Control Register */
367 #define RDR 0x20 /* Receive Data Register */
368 #define RMR 0x22 /* Receive mode Register */
369 #define RCSR 0x24 /* Receive Command/status Register */
370 #define RICR 0x26 /* Receive Interrupt Control Register */
371 #define RSR 0x28 /* Receive Sync Register */
372 #define RCLR 0x2a /* Receive count Limit Register */
373 #define RCCR 0x2c /* Receive Character count Register */
374 #define TC0R 0x2e /* Time Constant 0 Register */
375 #define TDR 0x30 /* Transmit Data Register */
376 #define TMR 0x32 /* Transmit mode Register */
377 #define TCSR 0x34 /* Transmit Command/status Register */
378 #define TICR 0x36 /* Transmit Interrupt Control Register */
379 #define TSR 0x38 /* Transmit Sync Register */
380 #define TCLR 0x3a /* Transmit count Limit Register */
381 #define TCCR 0x3c /* Transmit Character count Register */
382 #define TC1R 0x3e /* Time Constant 1 Register */
386 * MACRO DEFINITIONS FOR DMA REGISTERS
389 #define DCR 0x06 /* DMA Control Register (shared) */
390 #define DACR 0x08 /* DMA Array count Register (shared) */
391 #define BDCR 0x12 /* Burst/Dwell Control Register (shared) */
392 #define DIVR 0x14 /* DMA Interrupt Vector Register (shared) */
393 #define DICR 0x18 /* DMA Interrupt Control Register (shared) */
394 #define CDIR 0x1a /* Clear DMA Interrupt Register (shared) */
395 #define SDIR 0x1c /* Set DMA Interrupt Register (shared) */
397 #define TDMR 0x02 /* Transmit DMA mode Register */
398 #define TDIAR 0x1e /* Transmit DMA Interrupt Arm Register */
399 #define TBCR 0x2a /* Transmit Byte count Register */
400 #define TARL 0x2c /* Transmit Address Register (low) */
401 #define TARU 0x2e /* Transmit Address Register (high) */
402 #define NTBCR 0x3a /* Next Transmit Byte count Register */
403 #define NTARL 0x3c /* Next Transmit Address Register (low) */
404 #define NTARU 0x3e /* Next Transmit Address Register (high) */
406 #define RDMR 0x82 /* Receive DMA mode Register (non-shared) */
407 #define RDIAR 0x9e /* Receive DMA Interrupt Arm Register */
408 #define RBCR 0xaa /* Receive Byte count Register */
409 #define RARL 0xac /* Receive Address Register (low) */
410 #define RARU 0xae /* Receive Address Register (high) */
411 #define NRBCR 0xba /* Next Receive Byte count Register */
412 #define NRARL 0xbc /* Next Receive Address Register (low) */
413 #define NRARU 0xbe /* Next Receive Address Register (high) */
417 * MACRO DEFINITIONS FOR MODEM STATUS BITS
420 #define MODEMSTATUS_DTR 0x80
421 #define MODEMSTATUS_DSR 0x40
422 #define MODEMSTATUS_RTS 0x20
423 #define MODEMSTATUS_CTS 0x10
424 #define MODEMSTATUS_RI 0x04
425 #define MODEMSTATUS_DCD 0x01
429 * Channel Command/Address Register (CCAR) Command Codes
432 #define RTCmd_Null 0x0000
433 #define RTCmd_ResetHighestIus 0x1000
434 #define RTCmd_TriggerChannelLoadDma 0x2000
435 #define RTCmd_TriggerRxDma 0x2800
436 #define RTCmd_TriggerTxDma 0x3000
437 #define RTCmd_TriggerRxAndTxDma 0x3800
438 #define RTCmd_PurgeRxFifo 0x4800
439 #define RTCmd_PurgeTxFifo 0x5000
440 #define RTCmd_PurgeRxAndTxFifo 0x5800
441 #define RTCmd_LoadRcc 0x6800
442 #define RTCmd_LoadTcc 0x7000
443 #define RTCmd_LoadRccAndTcc 0x7800
444 #define RTCmd_LoadTC0 0x8800
445 #define RTCmd_LoadTC1 0x9000
446 #define RTCmd_LoadTC0AndTC1 0x9800
447 #define RTCmd_SerialDataLSBFirst 0xa000
448 #define RTCmd_SerialDataMSBFirst 0xa800
449 #define RTCmd_SelectBigEndian 0xb000
450 #define RTCmd_SelectLittleEndian 0xb800
454 * DMA Command/Address Register (DCAR) Command Codes
457 #define DmaCmd_Null 0x0000
458 #define DmaCmd_ResetTxChannel 0x1000
459 #define DmaCmd_ResetRxChannel 0x1200
460 #define DmaCmd_StartTxChannel 0x2000
461 #define DmaCmd_StartRxChannel 0x2200
462 #define DmaCmd_ContinueTxChannel 0x3000
463 #define DmaCmd_ContinueRxChannel 0x3200
464 #define DmaCmd_PauseTxChannel 0x4000
465 #define DmaCmd_PauseRxChannel 0x4200
466 #define DmaCmd_AbortTxChannel 0x5000
467 #define DmaCmd_AbortRxChannel 0x5200
468 #define DmaCmd_InitTxChannel 0x7000
469 #define DmaCmd_InitRxChannel 0x7200
470 #define DmaCmd_ResetHighestDmaIus 0x8000
471 #define DmaCmd_ResetAllChannels 0x9000
472 #define DmaCmd_StartAllChannels 0xa000
473 #define DmaCmd_ContinueAllChannels 0xb000
474 #define DmaCmd_PauseAllChannels 0xc000
475 #define DmaCmd_AbortAllChannels 0xd000
476 #define DmaCmd_InitAllChannels 0xf000
478 #define TCmd_Null 0x0000
479 #define TCmd_ClearTxCRC 0x2000
480 #define TCmd_SelectTicrTtsaData 0x4000
481 #define TCmd_SelectTicrTxFifostatus 0x5000
482 #define TCmd_SelectTicrIntLevel 0x6000
483 #define TCmd_SelectTicrdma_level 0x7000
484 #define TCmd_SendFrame 0x8000
485 #define TCmd_SendAbort 0x9000
486 #define TCmd_EnableDleInsertion 0xc000
487 #define TCmd_DisableDleInsertion 0xd000
488 #define TCmd_ClearEofEom 0xe000
489 #define TCmd_SetEofEom 0xf000
491 #define RCmd_Null 0x0000
492 #define RCmd_ClearRxCRC 0x2000
493 #define RCmd_EnterHuntmode 0x3000
494 #define RCmd_SelectRicrRtsaData 0x4000
495 #define RCmd_SelectRicrRxFifostatus 0x5000
496 #define RCmd_SelectRicrIntLevel 0x6000
497 #define RCmd_SelectRicrdma_level 0x7000
500 * Bits for enabling and disabling IRQs in Interrupt Control Register (ICR)
503 #define RECEIVE_STATUS BIT5
504 #define RECEIVE_DATA BIT4
505 #define TRANSMIT_STATUS BIT3
506 #define TRANSMIT_DATA BIT2
512 * Receive status Bits in Receive Command/status Register RCSR
515 #define RXSTATUS_SHORT_FRAME BIT8
516 #define RXSTATUS_CODE_VIOLATION BIT8
517 #define RXSTATUS_EXITED_HUNT BIT7
518 #define RXSTATUS_IDLE_RECEIVED BIT6
519 #define RXSTATUS_BREAK_RECEIVED BIT5
520 #define RXSTATUS_ABORT_RECEIVED BIT5
521 #define RXSTATUS_RXBOUND BIT4
522 #define RXSTATUS_CRC_ERROR BIT3
523 #define RXSTATUS_FRAMING_ERROR BIT3
524 #define RXSTATUS_ABORT BIT2
525 #define RXSTATUS_PARITY_ERROR BIT2
526 #define RXSTATUS_OVERRUN BIT1
527 #define RXSTATUS_DATA_AVAILABLE BIT0
528 #define RXSTATUS_ALL 0x01f6
529 #define usc_UnlatchRxstatusBits(a,b) usc_OutReg( (a), RCSR, (u16)((b) & RXSTATUS_ALL) )
532 * Values for setting transmit idle mode in
533 * Transmit Control/status Register (TCSR)
535 #define IDLEMODE_FLAGS 0x0000
536 #define IDLEMODE_ALT_ONE_ZERO 0x0100
537 #define IDLEMODE_ZERO 0x0200
538 #define IDLEMODE_ONE 0x0300
539 #define IDLEMODE_ALT_MARK_SPACE 0x0500
540 #define IDLEMODE_SPACE 0x0600
541 #define IDLEMODE_MARK 0x0700
542 #define IDLEMODE_MASK 0x0700
545 * IUSC revision identifiers
547 #define IUSC_SL1660 0x4d44
548 #define IUSC_PRE_SL1660 0x4553
551 * Transmit status Bits in Transmit Command/status Register (TCSR)
554 #define TCSR_PRESERVE 0x0F00
556 #define TCSR_UNDERWAIT BIT11
557 #define TXSTATUS_PREAMBLE_SENT BIT7
558 #define TXSTATUS_IDLE_SENT BIT6
559 #define TXSTATUS_ABORT_SENT BIT5
560 #define TXSTATUS_EOF_SENT BIT4
561 #define TXSTATUS_EOM_SENT BIT4
562 #define TXSTATUS_CRC_SENT BIT3
563 #define TXSTATUS_ALL_SENT BIT2
564 #define TXSTATUS_UNDERRUN BIT1
565 #define TXSTATUS_FIFO_EMPTY BIT0
566 #define TXSTATUS_ALL 0x00fa
567 #define usc_UnlatchTxstatusBits(a,b) usc_OutReg( (a), TCSR, (u16)((a)->tcsr_value + ((b) & 0x00FF)) )
570 #define MISCSTATUS_RXC_LATCHED BIT15
571 #define MISCSTATUS_RXC BIT14
572 #define MISCSTATUS_TXC_LATCHED BIT13
573 #define MISCSTATUS_TXC BIT12
574 #define MISCSTATUS_RI_LATCHED BIT11
575 #define MISCSTATUS_RI BIT10
576 #define MISCSTATUS_DSR_LATCHED BIT9
577 #define MISCSTATUS_DSR BIT8
578 #define MISCSTATUS_DCD_LATCHED BIT7
579 #define MISCSTATUS_DCD BIT6
580 #define MISCSTATUS_CTS_LATCHED BIT5
581 #define MISCSTATUS_CTS BIT4
582 #define MISCSTATUS_RCC_UNDERRUN BIT3
583 #define MISCSTATUS_DPLL_NO_SYNC BIT2
584 #define MISCSTATUS_BRG1_ZERO BIT1
585 #define MISCSTATUS_BRG0_ZERO BIT0
587 #define usc_UnlatchIostatusBits(a,b) usc_OutReg((a),MISR,(u16)((b) & 0xaaa0))
588 #define usc_UnlatchMiscstatusBits(a,b) usc_OutReg((a),MISR,(u16)((b) & 0x000f))
590 #define SICR_RXC_ACTIVE BIT15
591 #define SICR_RXC_INACTIVE BIT14
592 #define SICR_RXC (BIT15+BIT14)
593 #define SICR_TXC_ACTIVE BIT13
594 #define SICR_TXC_INACTIVE BIT12
595 #define SICR_TXC (BIT13+BIT12)
596 #define SICR_RI_ACTIVE BIT11
597 #define SICR_RI_INACTIVE BIT10
598 #define SICR_RI (BIT11+BIT10)
599 #define SICR_DSR_ACTIVE BIT9
600 #define SICR_DSR_INACTIVE BIT8
601 #define SICR_DSR (BIT9+BIT8)
602 #define SICR_DCD_ACTIVE BIT7
603 #define SICR_DCD_INACTIVE BIT6
604 #define SICR_DCD (BIT7+BIT6)
605 #define SICR_CTS_ACTIVE BIT5
606 #define SICR_CTS_INACTIVE BIT4
607 #define SICR_CTS (BIT5+BIT4)
608 #define SICR_RCC_UNDERFLOW BIT3
609 #define SICR_DPLL_NO_SYNC BIT2
610 #define SICR_BRG1_ZERO BIT1
611 #define SICR_BRG0_ZERO BIT0
613 void usc_DisableMasterIrqBit( struct mgsl_struct *info );
614 void usc_EnableMasterIrqBit( struct mgsl_struct *info );
615 void usc_EnableInterrupts( struct mgsl_struct *info, u16 IrqMask );
616 void usc_DisableInterrupts( struct mgsl_struct *info, u16 IrqMask );
617 void usc_ClearIrqPendingBits( struct mgsl_struct *info, u16 IrqMask );
619 #define usc_EnableInterrupts( a, b ) \
620 usc_OutReg( (a), ICR, (u16)((usc_InReg((a),ICR) & 0xff00) + 0xc0 + (b)) )
622 #define usc_DisableInterrupts( a, b ) \
623 usc_OutReg( (a), ICR, (u16)((usc_InReg((a),ICR) & 0xff00) + 0x80 + (b)) )
625 #define usc_EnableMasterIrqBit(a) \
626 usc_OutReg( (a), ICR, (u16)((usc_InReg((a),ICR) & 0x0f00) + 0xb000) )
628 #define usc_DisableMasterIrqBit(a) \
629 usc_OutReg( (a), ICR, (u16)(usc_InReg((a),ICR) & 0x7f00) )
631 #define usc_ClearIrqPendingBits( a, b ) usc_OutReg( (a), DCCR, 0x40 + (b) )
634 * Transmit status Bits in Transmit Control status Register (TCSR)
635 * and Transmit Interrupt Control Register (TICR) (except BIT2, BIT0)
638 #define TXSTATUS_PREAMBLE_SENT BIT7
639 #define TXSTATUS_IDLE_SENT BIT6
640 #define TXSTATUS_ABORT_SENT BIT5
641 #define TXSTATUS_EOF BIT4
642 #define TXSTATUS_CRC_SENT BIT3
643 #define TXSTATUS_ALL_SENT BIT2
644 #define TXSTATUS_UNDERRUN BIT1
645 #define TXSTATUS_FIFO_EMPTY BIT0
647 #define DICR_MASTER BIT15
648 #define DICR_TRANSMIT BIT0
649 #define DICR_RECEIVE BIT1
651 #define usc_EnableDmaInterrupts(a,b) \
652 usc_OutDmaReg( (a), DICR, (u16)(usc_InDmaReg((a),DICR) | (b)) )
654 #define usc_DisableDmaInterrupts(a,b) \
655 usc_OutDmaReg( (a), DICR, (u16)(usc_InDmaReg((a),DICR) & ~(b)) )
657 #define usc_EnableStatusIrqs(a,b) \
658 usc_OutReg( (a), SICR, (u16)(usc_InReg((a),SICR) | (b)) )
660 #define usc_DisablestatusIrqs(a,b) \
661 usc_OutReg( (a), SICR, (u16)(usc_InReg((a),SICR) & ~(b)) )
663 /* Transmit status Bits in Transmit Control status Register (TCSR) */
664 /* and Transmit Interrupt Control Register (TICR) (except BIT2, BIT0) */
667 #define DISABLE_UNCONDITIONAL 0
668 #define DISABLE_END_OF_FRAME 1
669 #define ENABLE_UNCONDITIONAL 2
670 #define ENABLE_AUTO_CTS 3
671 #define ENABLE_AUTO_DCD 3
672 #define usc_EnableTransmitter(a,b) \
673 usc_OutReg( (a), TMR, (u16)((usc_InReg((a),TMR) & 0xfffc) | (b)) )
674 #define usc_EnableReceiver(a,b) \
675 usc_OutReg( (a), RMR, (u16)((usc_InReg((a),RMR) & 0xfffc) | (b)) )
677 static u16 usc_InDmaReg( struct mgsl_struct *info, u16 Port );
678 static void usc_OutDmaReg( struct mgsl_struct *info, u16 Port, u16 Value );
679 static void usc_DmaCmd( struct mgsl_struct *info, u16 Cmd );
681 static u16 usc_InReg( struct mgsl_struct *info, u16 Port );
682 static void usc_OutReg( struct mgsl_struct *info, u16 Port, u16 Value );
683 static void usc_RTCmd( struct mgsl_struct *info, u16 Cmd );
684 void usc_RCmd( struct mgsl_struct *info, u16 Cmd );
685 void usc_TCmd( struct mgsl_struct *info, u16 Cmd );
687 #define usc_TCmd(a,b) usc_OutReg((a), TCSR, (u16)((a)->tcsr_value + (b)))
688 #define usc_RCmd(a,b) usc_OutReg((a), RCSR, (b))
690 #define usc_SetTransmitSyncChars(a,s0,s1) usc_OutReg((a), TSR, (u16)(((u16)s0<<8)|(u16)s1))
692 static void usc_process_rxoverrun_sync( struct mgsl_struct *info );
693 static void usc_start_receiver( struct mgsl_struct *info );
694 static void usc_stop_receiver( struct mgsl_struct *info );
696 static void usc_start_transmitter( struct mgsl_struct *info );
697 static void usc_stop_transmitter( struct mgsl_struct *info );
698 static void usc_set_txidle( struct mgsl_struct *info );
699 static void usc_load_txfifo( struct mgsl_struct *info );
701 static void usc_enable_aux_clock( struct mgsl_struct *info, u32 DataRate );
702 static void usc_enable_loopback( struct mgsl_struct *info, int enable );
704 static void usc_get_serial_signals( struct mgsl_struct *info );
705 static void usc_set_serial_signals( struct mgsl_struct *info );
707 static void usc_reset( struct mgsl_struct *info );
709 static void usc_set_sync_mode( struct mgsl_struct *info );
710 static void usc_set_sdlc_mode( struct mgsl_struct *info );
711 static void usc_set_async_mode( struct mgsl_struct *info );
712 static void usc_enable_async_clock( struct mgsl_struct *info, u32 DataRate );
714 static void usc_loopback_frame( struct mgsl_struct *info );
716 static void mgsl_tx_timeout(unsigned long context);
719 static void usc_loopmode_cancel_transmit( struct mgsl_struct * info );
720 static void usc_loopmode_insert_request( struct mgsl_struct * info );
721 static int usc_loopmode_active( struct mgsl_struct * info);
722 static void usc_loopmode_send_done( struct mgsl_struct * info );
724 static int mgsl_ioctl_common(struct mgsl_struct *info, unsigned int cmd, unsigned long arg);
726 #if SYNCLINK_GENERIC_HDLC
727 #define dev_to_port(D) (dev_to_hdlc(D)->priv)
728 static void hdlcdev_tx_done(struct mgsl_struct *info);
729 static void hdlcdev_rx(struct mgsl_struct *info, char *buf, int size);
730 static int hdlcdev_init(struct mgsl_struct *info);
731 static void hdlcdev_exit(struct mgsl_struct *info);
735 * Defines a BUS descriptor value for the PCI adapter
736 * local bus address ranges.
739 #define BUS_DESCRIPTOR( WrHold, WrDly, RdDly, Nwdd, Nwad, Nxda, Nrdd, Nrad ) \
750 static void mgsl_trace_block(struct mgsl_struct *info,const char* data, int count, int xmit);
753 * Adapter diagnostic routines
755 static BOOLEAN mgsl_register_test( struct mgsl_struct *info );
756 static BOOLEAN mgsl_irq_test( struct mgsl_struct *info );
757 static BOOLEAN mgsl_dma_test( struct mgsl_struct *info );
758 static BOOLEAN mgsl_memory_test( struct mgsl_struct *info );
759 static int mgsl_adapter_test( struct mgsl_struct *info );
762 * device and resource management routines
764 static int mgsl_claim_resources(struct mgsl_struct *info);
765 static void mgsl_release_resources(struct mgsl_struct *info);
766 static void mgsl_add_device(struct mgsl_struct *info);
767 static struct mgsl_struct* mgsl_allocate_device(void);
770 * DMA buffer manupulation functions.
772 static void mgsl_free_rx_frame_buffers( struct mgsl_struct *info, unsigned int StartIndex, unsigned int EndIndex );
773 static int mgsl_get_rx_frame( struct mgsl_struct *info );
774 static int mgsl_get_raw_rx_frame( struct mgsl_struct *info );
775 static void mgsl_reset_rx_dma_buffers( struct mgsl_struct *info );
776 static void mgsl_reset_tx_dma_buffers( struct mgsl_struct *info );
777 static int num_free_tx_dma_buffers(struct mgsl_struct *info);
778 static void mgsl_load_tx_dma_buffer( struct mgsl_struct *info, const char *Buffer, unsigned int BufferSize);
779 static void mgsl_load_pci_memory(char* TargetPtr, const char* SourcePtr, unsigned short count);
782 * DMA and Shared Memory buffer allocation and formatting
784 static int mgsl_allocate_dma_buffers(struct mgsl_struct *info);
785 static void mgsl_free_dma_buffers(struct mgsl_struct *info);
786 static int mgsl_alloc_frame_memory(struct mgsl_struct *info, DMABUFFERENTRY *BufferList,int Buffercount);
787 static void mgsl_free_frame_memory(struct mgsl_struct *info, DMABUFFERENTRY *BufferList,int Buffercount);
788 static int mgsl_alloc_buffer_list_memory(struct mgsl_struct *info);
789 static void mgsl_free_buffer_list_memory(struct mgsl_struct *info);
790 static int mgsl_alloc_intermediate_rxbuffer_memory(struct mgsl_struct *info);
791 static void mgsl_free_intermediate_rxbuffer_memory(struct mgsl_struct *info);
792 static int mgsl_alloc_intermediate_txbuffer_memory(struct mgsl_struct *info);
793 static void mgsl_free_intermediate_txbuffer_memory(struct mgsl_struct *info);
794 static int load_next_tx_holding_buffer(struct mgsl_struct *info);
795 static int save_tx_buffer_request(struct mgsl_struct *info,const char *Buffer, unsigned int BufferSize);
798 * Bottom half interrupt handlers
800 static void mgsl_bh_handler(struct work_struct *work);
801 static void mgsl_bh_receive(struct mgsl_struct *info);
802 static void mgsl_bh_transmit(struct mgsl_struct *info);
803 static void mgsl_bh_status(struct mgsl_struct *info);
806 * Interrupt handler routines and dispatch table.
808 static void mgsl_isr_null( struct mgsl_struct *info );
809 static void mgsl_isr_transmit_data( struct mgsl_struct *info );
810 static void mgsl_isr_receive_data( struct mgsl_struct *info );
811 static void mgsl_isr_receive_status( struct mgsl_struct *info );
812 static void mgsl_isr_transmit_status( struct mgsl_struct *info );
813 static void mgsl_isr_io_pin( struct mgsl_struct *info );
814 static void mgsl_isr_misc( struct mgsl_struct *info );
815 static void mgsl_isr_receive_dma( struct mgsl_struct *info );
816 static void mgsl_isr_transmit_dma( struct mgsl_struct *info );
818 typedef void (*isr_dispatch_func)(struct mgsl_struct *);
820 static isr_dispatch_func UscIsrTable[7] =
825 mgsl_isr_transmit_data,
826 mgsl_isr_transmit_status,
827 mgsl_isr_receive_data,
828 mgsl_isr_receive_status
832 * ioctl call handlers
834 static int tiocmget(struct tty_struct *tty, struct file *file);
835 static int tiocmset(struct tty_struct *tty, struct file *file,
836 unsigned int set, unsigned int clear);
837 static int mgsl_get_stats(struct mgsl_struct * info, struct mgsl_icount
838 __user *user_icount);
839 static int mgsl_get_params(struct mgsl_struct * info, MGSL_PARAMS __user *user_params);
840 static int mgsl_set_params(struct mgsl_struct * info, MGSL_PARAMS __user *new_params);
841 static int mgsl_get_txidle(struct mgsl_struct * info, int __user *idle_mode);
842 static int mgsl_set_txidle(struct mgsl_struct * info, int idle_mode);
843 static int mgsl_txenable(struct mgsl_struct * info, int enable);
844 static int mgsl_txabort(struct mgsl_struct * info);
845 static int mgsl_rxenable(struct mgsl_struct * info, int enable);
846 static int mgsl_wait_event(struct mgsl_struct * info, int __user *mask);
847 static int mgsl_loopmode_send_done( struct mgsl_struct * info );
849 /* set non-zero on successful registration with PCI subsystem */
850 static int pci_registered;
853 * Global linked list of SyncLink devices
855 static struct mgsl_struct *mgsl_device_list;
856 static int mgsl_device_count;
859 * Set this param to non-zero to load eax with the
860 * .text section address and breakpoint on module load.
861 * This is useful for use with gdb and add-symbol-file command.
863 static int break_on_load;
866 * Driver major number, defaults to zero to get auto
867 * assigned major number. May be forced as module parameter.
872 * Array of user specified options for ISA adapters.
874 static int io[MAX_ISA_DEVICES];
875 static int irq[MAX_ISA_DEVICES];
876 static int dma[MAX_ISA_DEVICES];
877 static int debug_level;
878 static int maxframe[MAX_TOTAL_DEVICES];
879 static int dosyncppp[MAX_TOTAL_DEVICES];
880 static int txdmabufs[MAX_TOTAL_DEVICES];
881 static int txholdbufs[MAX_TOTAL_DEVICES];
883 module_param(break_on_load, bool, 0);
884 module_param(ttymajor, int, 0);
885 module_param_array(io, int, NULL, 0);
886 module_param_array(irq, int, NULL, 0);
887 module_param_array(dma, int, NULL, 0);
888 module_param(debug_level, int, 0);
889 module_param_array(maxframe, int, NULL, 0);
890 module_param_array(dosyncppp, int, NULL, 0);
891 module_param_array(txdmabufs, int, NULL, 0);
892 module_param_array(txholdbufs, int, NULL, 0);
894 static char *driver_name = "SyncLink serial driver";
895 static char *driver_version = "$Revision: 4.38 $";
897 static int synclink_init_one (struct pci_dev *dev,
898 const struct pci_device_id *ent);
899 static void synclink_remove_one (struct pci_dev *dev);
901 static struct pci_device_id synclink_pci_tbl[] = {
902 { PCI_VENDOR_ID_MICROGATE, PCI_DEVICE_ID_MICROGATE_USC, PCI_ANY_ID, PCI_ANY_ID, },
903 { PCI_VENDOR_ID_MICROGATE, 0x0210, PCI_ANY_ID, PCI_ANY_ID, },
904 { 0, }, /* terminate list */
906 MODULE_DEVICE_TABLE(pci, synclink_pci_tbl);
908 MODULE_LICENSE("GPL");
910 static struct pci_driver synclink_pci_driver = {
912 .id_table = synclink_pci_tbl,
913 .probe = synclink_init_one,
914 .remove = __devexit_p(synclink_remove_one),
917 static struct tty_driver *serial_driver;
919 /* number of characters left in xmit buffer before we ask for more */
920 #define WAKEUP_CHARS 256
923 static void mgsl_change_params(struct mgsl_struct *info);
924 static void mgsl_wait_until_sent(struct tty_struct *tty, int timeout);
927 * 1st function defined in .text section. Calling this function in
928 * init_module() followed by a breakpoint allows a remote debugger
929 * (gdb) to get the .text address for the add-symbol-file command.
930 * This allows remote debugging of dynamically loadable modules.
932 static void* mgsl_get_text_ptr(void)
934 return mgsl_get_text_ptr;
937 static inline int mgsl_paranoia_check(struct mgsl_struct *info,
938 char *name, const char *routine)
940 #ifdef MGSL_PARANOIA_CHECK
941 static const char *badmagic =
942 "Warning: bad magic number for mgsl struct (%s) in %s\n";
943 static const char *badinfo =
944 "Warning: null mgsl_struct for (%s) in %s\n";
947 printk(badinfo, name, routine);
950 if (info->magic != MGSL_MAGIC) {
951 printk(badmagic, name, routine);
962 * line discipline callback wrappers
964 * The wrappers maintain line discipline references
965 * while calling into the line discipline.
967 * ldisc_receive_buf - pass receive data to line discipline
970 static void ldisc_receive_buf(struct tty_struct *tty,
971 const __u8 *data, char *flags, int count)
973 struct tty_ldisc *ld;
976 ld = tty_ldisc_ref(tty);
979 ld->receive_buf(tty, data, flags, count);
984 /* mgsl_stop() throttle (stop) transmitter
986 * Arguments: tty pointer to tty info structure
989 static void mgsl_stop(struct tty_struct *tty)
991 struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
994 if (mgsl_paranoia_check(info, tty->name, "mgsl_stop"))
997 if ( debug_level >= DEBUG_LEVEL_INFO )
998 printk("mgsl_stop(%s)\n",info->device_name);
1000 spin_lock_irqsave(&info->irq_spinlock,flags);
1001 if (info->tx_enabled)
1002 usc_stop_transmitter(info);
1003 spin_unlock_irqrestore(&info->irq_spinlock,flags);
1005 } /* end of mgsl_stop() */
1007 /* mgsl_start() release (start) transmitter
1009 * Arguments: tty pointer to tty info structure
1010 * Return Value: None
1012 static void mgsl_start(struct tty_struct *tty)
1014 struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
1015 unsigned long flags;
1017 if (mgsl_paranoia_check(info, tty->name, "mgsl_start"))
1020 if ( debug_level >= DEBUG_LEVEL_INFO )
1021 printk("mgsl_start(%s)\n",info->device_name);
1023 spin_lock_irqsave(&info->irq_spinlock,flags);
1024 if (!info->tx_enabled)
1025 usc_start_transmitter(info);
1026 spin_unlock_irqrestore(&info->irq_spinlock,flags);
1028 } /* end of mgsl_start() */
1031 * Bottom half work queue access functions
1034 /* mgsl_bh_action() Return next bottom half action to perform.
1035 * Return Value: BH action code or 0 if nothing to do.
1037 static int mgsl_bh_action(struct mgsl_struct *info)
1039 unsigned long flags;
1042 spin_lock_irqsave(&info->irq_spinlock,flags);
1044 if (info->pending_bh & BH_RECEIVE) {
1045 info->pending_bh &= ~BH_RECEIVE;
1047 } else if (info->pending_bh & BH_TRANSMIT) {
1048 info->pending_bh &= ~BH_TRANSMIT;
1050 } else if (info->pending_bh & BH_STATUS) {
1051 info->pending_bh &= ~BH_STATUS;
1056 /* Mark BH routine as complete */
1057 info->bh_running = 0;
1058 info->bh_requested = 0;
1061 spin_unlock_irqrestore(&info->irq_spinlock,flags);
1067 * Perform bottom half processing of work items queued by ISR.
1069 static void mgsl_bh_handler(struct work_struct *work)
1071 struct mgsl_struct *info =
1072 container_of(work, struct mgsl_struct, task);
1078 if ( debug_level >= DEBUG_LEVEL_BH )
1079 printk( "%s(%d):mgsl_bh_handler(%s) entry\n",
1080 __FILE__,__LINE__,info->device_name);
1082 info->bh_running = 1;
1084 while((action = mgsl_bh_action(info)) != 0) {
1086 /* Process work item */
1087 if ( debug_level >= DEBUG_LEVEL_BH )
1088 printk( "%s(%d):mgsl_bh_handler() work item action=%d\n",
1089 __FILE__,__LINE__,action);
1094 mgsl_bh_receive(info);
1097 mgsl_bh_transmit(info);
1100 mgsl_bh_status(info);
1103 /* unknown work item ID */
1104 printk("Unknown work item ID=%08X!\n", action);
1109 if ( debug_level >= DEBUG_LEVEL_BH )
1110 printk( "%s(%d):mgsl_bh_handler(%s) exit\n",
1111 __FILE__,__LINE__,info->device_name);
1114 static void mgsl_bh_receive(struct mgsl_struct *info)
1116 int (*get_rx_frame)(struct mgsl_struct *info) =
1117 (info->params.mode == MGSL_MODE_HDLC ? mgsl_get_rx_frame : mgsl_get_raw_rx_frame);
1119 if ( debug_level >= DEBUG_LEVEL_BH )
1120 printk( "%s(%d):mgsl_bh_receive(%s)\n",
1121 __FILE__,__LINE__,info->device_name);
1125 if (info->rx_rcc_underrun) {
1126 unsigned long flags;
1127 spin_lock_irqsave(&info->irq_spinlock,flags);
1128 usc_start_receiver(info);
1129 spin_unlock_irqrestore(&info->irq_spinlock,flags);
1132 } while(get_rx_frame(info));
1135 static void mgsl_bh_transmit(struct mgsl_struct *info)
1137 struct tty_struct *tty = info->tty;
1138 unsigned long flags;
1140 if ( debug_level >= DEBUG_LEVEL_BH )
1141 printk( "%s(%d):mgsl_bh_transmit() entry on %s\n",
1142 __FILE__,__LINE__,info->device_name);
1147 /* if transmitter idle and loopmode_send_done_requested
1148 * then start echoing RxD to TxD
1150 spin_lock_irqsave(&info->irq_spinlock,flags);
1151 if ( !info->tx_active && info->loopmode_send_done_requested )
1152 usc_loopmode_send_done( info );
1153 spin_unlock_irqrestore(&info->irq_spinlock,flags);
1156 static void mgsl_bh_status(struct mgsl_struct *info)
1158 if ( debug_level >= DEBUG_LEVEL_BH )
1159 printk( "%s(%d):mgsl_bh_status() entry on %s\n",
1160 __FILE__,__LINE__,info->device_name);
1162 info->ri_chkcount = 0;
1163 info->dsr_chkcount = 0;
1164 info->dcd_chkcount = 0;
1165 info->cts_chkcount = 0;
1168 /* mgsl_isr_receive_status()
1170 * Service a receive status interrupt. The type of status
1171 * interrupt is indicated by the state of the RCSR.
1172 * This is only used for HDLC mode.
1174 * Arguments: info pointer to device instance data
1175 * Return Value: None
1177 static void mgsl_isr_receive_status( struct mgsl_struct *info )
1179 u16 status = usc_InReg( info, RCSR );
1181 if ( debug_level >= DEBUG_LEVEL_ISR )
1182 printk("%s(%d):mgsl_isr_receive_status status=%04X\n",
1183 __FILE__,__LINE__,status);
1185 if ( (status & RXSTATUS_ABORT_RECEIVED) &&
1186 info->loopmode_insert_requested &&
1187 usc_loopmode_active(info) )
1189 ++info->icount.rxabort;
1190 info->loopmode_insert_requested = FALSE;
1192 /* clear CMR:13 to start echoing RxD to TxD */
1193 info->cmr_value &= ~BIT13;
1194 usc_OutReg(info, CMR, info->cmr_value);
1196 /* disable received abort irq (no longer required) */
1197 usc_OutReg(info, RICR,
1198 (usc_InReg(info, RICR) & ~RXSTATUS_ABORT_RECEIVED));
1201 if (status & (RXSTATUS_EXITED_HUNT + RXSTATUS_IDLE_RECEIVED)) {
1202 if (status & RXSTATUS_EXITED_HUNT)
1203 info->icount.exithunt++;
1204 if (status & RXSTATUS_IDLE_RECEIVED)
1205 info->icount.rxidle++;
1206 wake_up_interruptible(&info->event_wait_q);
1209 if (status & RXSTATUS_OVERRUN){
1210 info->icount.rxover++;
1211 usc_process_rxoverrun_sync( info );
1214 usc_ClearIrqPendingBits( info, RECEIVE_STATUS );
1215 usc_UnlatchRxstatusBits( info, status );
1217 } /* end of mgsl_isr_receive_status() */
1219 /* mgsl_isr_transmit_status()
1221 * Service a transmit status interrupt
1222 * HDLC mode :end of transmit frame
1223 * Async mode:all data is sent
1224 * transmit status is indicated by bits in the TCSR.
1226 * Arguments: info pointer to device instance data
1227 * Return Value: None
1229 static void mgsl_isr_transmit_status( struct mgsl_struct *info )
1231 u16 status = usc_InReg( info, TCSR );
1233 if ( debug_level >= DEBUG_LEVEL_ISR )
1234 printk("%s(%d):mgsl_isr_transmit_status status=%04X\n",
1235 __FILE__,__LINE__,status);
1237 usc_ClearIrqPendingBits( info, TRANSMIT_STATUS );
1238 usc_UnlatchTxstatusBits( info, status );
1240 if ( status & (TXSTATUS_UNDERRUN | TXSTATUS_ABORT_SENT) )
1242 /* finished sending HDLC abort. This may leave */
1243 /* the TxFifo with data from the aborted frame */
1244 /* so purge the TxFifo. Also shutdown the DMA */
1245 /* channel in case there is data remaining in */
1246 /* the DMA buffer */
1247 usc_DmaCmd( info, DmaCmd_ResetTxChannel );
1248 usc_RTCmd( info, RTCmd_PurgeTxFifo );
1251 if ( status & TXSTATUS_EOF_SENT )
1252 info->icount.txok++;
1253 else if ( status & TXSTATUS_UNDERRUN )
1254 info->icount.txunder++;
1255 else if ( status & TXSTATUS_ABORT_SENT )
1256 info->icount.txabort++;
1258 info->icount.txunder++;
1260 info->tx_active = 0;
1261 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1262 del_timer(&info->tx_timer);
1264 if ( info->drop_rts_on_tx_done ) {
1265 usc_get_serial_signals( info );
1266 if ( info->serial_signals & SerialSignal_RTS ) {
1267 info->serial_signals &= ~SerialSignal_RTS;
1268 usc_set_serial_signals( info );
1270 info->drop_rts_on_tx_done = 0;
1273 #if SYNCLINK_GENERIC_HDLC
1275 hdlcdev_tx_done(info);
1279 if (info->tty->stopped || info->tty->hw_stopped) {
1280 usc_stop_transmitter(info);
1283 info->pending_bh |= BH_TRANSMIT;
1286 } /* end of mgsl_isr_transmit_status() */
1288 /* mgsl_isr_io_pin()
1290 * Service an Input/Output pin interrupt. The type of
1291 * interrupt is indicated by bits in the MISR
1293 * Arguments: info pointer to device instance data
1294 * Return Value: None
1296 static void mgsl_isr_io_pin( struct mgsl_struct *info )
1298 struct mgsl_icount *icount;
1299 u16 status = usc_InReg( info, MISR );
1301 if ( debug_level >= DEBUG_LEVEL_ISR )
1302 printk("%s(%d):mgsl_isr_io_pin status=%04X\n",
1303 __FILE__,__LINE__,status);
1305 usc_ClearIrqPendingBits( info, IO_PIN );
1306 usc_UnlatchIostatusBits( info, status );
1308 if (status & (MISCSTATUS_CTS_LATCHED | MISCSTATUS_DCD_LATCHED |
1309 MISCSTATUS_DSR_LATCHED | MISCSTATUS_RI_LATCHED) ) {
1310 icount = &info->icount;
1311 /* update input line counters */
1312 if (status & MISCSTATUS_RI_LATCHED) {
1313 if ((info->ri_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
1314 usc_DisablestatusIrqs(info,SICR_RI);
1316 if ( status & MISCSTATUS_RI )
1317 info->input_signal_events.ri_up++;
1319 info->input_signal_events.ri_down++;
1321 if (status & MISCSTATUS_DSR_LATCHED) {
1322 if ((info->dsr_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
1323 usc_DisablestatusIrqs(info,SICR_DSR);
1325 if ( status & MISCSTATUS_DSR )
1326 info->input_signal_events.dsr_up++;
1328 info->input_signal_events.dsr_down++;
1330 if (status & MISCSTATUS_DCD_LATCHED) {
1331 if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
1332 usc_DisablestatusIrqs(info,SICR_DCD);
1334 if (status & MISCSTATUS_DCD) {
1335 info->input_signal_events.dcd_up++;
1337 info->input_signal_events.dcd_down++;
1338 #if SYNCLINK_GENERIC_HDLC
1339 if (info->netcount) {
1340 if (status & MISCSTATUS_DCD)
1341 netif_carrier_on(info->netdev);
1343 netif_carrier_off(info->netdev);
1347 if (status & MISCSTATUS_CTS_LATCHED)
1349 if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
1350 usc_DisablestatusIrqs(info,SICR_CTS);
1352 if ( status & MISCSTATUS_CTS )
1353 info->input_signal_events.cts_up++;
1355 info->input_signal_events.cts_down++;
1357 wake_up_interruptible(&info->status_event_wait_q);
1358 wake_up_interruptible(&info->event_wait_q);
1360 if ( (info->flags & ASYNC_CHECK_CD) &&
1361 (status & MISCSTATUS_DCD_LATCHED) ) {
1362 if ( debug_level >= DEBUG_LEVEL_ISR )
1363 printk("%s CD now %s...", info->device_name,
1364 (status & MISCSTATUS_DCD) ? "on" : "off");
1365 if (status & MISCSTATUS_DCD)
1366 wake_up_interruptible(&info->open_wait);
1368 if ( debug_level >= DEBUG_LEVEL_ISR )
1369 printk("doing serial hangup...");
1371 tty_hangup(info->tty);
1375 if ( (info->flags & ASYNC_CTS_FLOW) &&
1376 (status & MISCSTATUS_CTS_LATCHED) ) {
1377 if (info->tty->hw_stopped) {
1378 if (status & MISCSTATUS_CTS) {
1379 if ( debug_level >= DEBUG_LEVEL_ISR )
1380 printk("CTS tx start...");
1382 info->tty->hw_stopped = 0;
1383 usc_start_transmitter(info);
1384 info->pending_bh |= BH_TRANSMIT;
1388 if (!(status & MISCSTATUS_CTS)) {
1389 if ( debug_level >= DEBUG_LEVEL_ISR )
1390 printk("CTS tx stop...");
1392 info->tty->hw_stopped = 1;
1393 usc_stop_transmitter(info);
1399 info->pending_bh |= BH_STATUS;
1401 /* for diagnostics set IRQ flag */
1402 if ( status & MISCSTATUS_TXC_LATCHED ){
1403 usc_OutReg( info, SICR,
1404 (unsigned short)(usc_InReg(info,SICR) & ~(SICR_TXC_ACTIVE+SICR_TXC_INACTIVE)) );
1405 usc_UnlatchIostatusBits( info, MISCSTATUS_TXC_LATCHED );
1406 info->irq_occurred = 1;
1409 } /* end of mgsl_isr_io_pin() */
1411 /* mgsl_isr_transmit_data()
1413 * Service a transmit data interrupt (async mode only).
1415 * Arguments: info pointer to device instance data
1416 * Return Value: None
1418 static void mgsl_isr_transmit_data( struct mgsl_struct *info )
1420 if ( debug_level >= DEBUG_LEVEL_ISR )
1421 printk("%s(%d):mgsl_isr_transmit_data xmit_cnt=%d\n",
1422 __FILE__,__LINE__,info->xmit_cnt);
1424 usc_ClearIrqPendingBits( info, TRANSMIT_DATA );
1426 if (info->tty->stopped || info->tty->hw_stopped) {
1427 usc_stop_transmitter(info);
1431 if ( info->xmit_cnt )
1432 usc_load_txfifo( info );
1434 info->tx_active = 0;
1436 if (info->xmit_cnt < WAKEUP_CHARS)
1437 info->pending_bh |= BH_TRANSMIT;
1439 } /* end of mgsl_isr_transmit_data() */
1441 /* mgsl_isr_receive_data()
1443 * Service a receive data interrupt. This occurs
1444 * when operating in asynchronous interrupt transfer mode.
1445 * The receive data FIFO is flushed to the receive data buffers.
1447 * Arguments: info pointer to device instance data
1448 * Return Value: None
1450 static void mgsl_isr_receive_data( struct mgsl_struct *info )
1455 unsigned char DataByte;
1456 struct tty_struct *tty = info->tty;
1457 struct mgsl_icount *icount = &info->icount;
1459 if ( debug_level >= DEBUG_LEVEL_ISR )
1460 printk("%s(%d):mgsl_isr_receive_data\n",
1463 usc_ClearIrqPendingBits( info, RECEIVE_DATA );
1465 /* select FIFO status for RICR readback */
1466 usc_RCmd( info, RCmd_SelectRicrRxFifostatus );
1468 /* clear the Wordstatus bit so that status readback */
1469 /* only reflects the status of this byte */
1470 usc_OutReg( info, RICR+LSBONLY, (u16)(usc_InReg(info, RICR+LSBONLY) & ~BIT3 ));
1472 /* flush the receive FIFO */
1474 while( (Fifocount = (usc_InReg(info,RICR) >> 8)) ) {
1477 /* read one byte from RxFIFO */
1478 outw( (inw(info->io_base + CCAR) & 0x0780) | (RDR+LSBONLY),
1479 info->io_base + CCAR );
1480 DataByte = inb( info->io_base + CCAR );
1482 /* get the status of the received byte */
1483 status = usc_InReg(info, RCSR);
1484 if ( status & (RXSTATUS_FRAMING_ERROR + RXSTATUS_PARITY_ERROR +
1485 RXSTATUS_OVERRUN + RXSTATUS_BREAK_RECEIVED) )
1486 usc_UnlatchRxstatusBits(info,RXSTATUS_ALL);
1491 if ( status & (RXSTATUS_FRAMING_ERROR + RXSTATUS_PARITY_ERROR +
1492 RXSTATUS_OVERRUN + RXSTATUS_BREAK_RECEIVED) ) {
1493 printk("rxerr=%04X\n",status);
1494 /* update error statistics */
1495 if ( status & RXSTATUS_BREAK_RECEIVED ) {
1496 status &= ~(RXSTATUS_FRAMING_ERROR + RXSTATUS_PARITY_ERROR);
1498 } else if (status & RXSTATUS_PARITY_ERROR)
1500 else if (status & RXSTATUS_FRAMING_ERROR)
1502 else if (status & RXSTATUS_OVERRUN) {
1503 /* must issue purge fifo cmd before */
1504 /* 16C32 accepts more receive chars */
1505 usc_RTCmd(info,RTCmd_PurgeRxFifo);
1509 /* discard char if tty control flags say so */
1510 if (status & info->ignore_status_mask)
1513 status &= info->read_status_mask;
1515 if (status & RXSTATUS_BREAK_RECEIVED) {
1517 if (info->flags & ASYNC_SAK)
1519 } else if (status & RXSTATUS_PARITY_ERROR)
1521 else if (status & RXSTATUS_FRAMING_ERROR)
1523 } /* end of if (error) */
1524 tty_insert_flip_char(tty, DataByte, flag);
1525 if (status & RXSTATUS_OVERRUN) {
1526 /* Overrun is special, since it's
1527 * reported immediately, and doesn't
1528 * affect the current character
1530 work += tty_insert_flip_char(tty, 0, TTY_OVERRUN);
1534 if ( debug_level >= DEBUG_LEVEL_ISR ) {
1535 printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
1536 __FILE__,__LINE__,icount->rx,icount->brk,
1537 icount->parity,icount->frame,icount->overrun);
1541 tty_flip_buffer_push(tty);
1546 * Service a miscellaneous interrupt source.
1548 * Arguments: info pointer to device extension (instance data)
1549 * Return Value: None
1551 static void mgsl_isr_misc( struct mgsl_struct *info )
1553 u16 status = usc_InReg( info, MISR );
1555 if ( debug_level >= DEBUG_LEVEL_ISR )
1556 printk("%s(%d):mgsl_isr_misc status=%04X\n",
1557 __FILE__,__LINE__,status);
1559 if ((status & MISCSTATUS_RCC_UNDERRUN) &&
1560 (info->params.mode == MGSL_MODE_HDLC)) {
1562 /* turn off receiver and rx DMA */
1563 usc_EnableReceiver(info,DISABLE_UNCONDITIONAL);
1564 usc_DmaCmd(info, DmaCmd_ResetRxChannel);
1565 usc_UnlatchRxstatusBits(info, RXSTATUS_ALL);
1566 usc_ClearIrqPendingBits(info, RECEIVE_DATA + RECEIVE_STATUS);
1567 usc_DisableInterrupts(info, RECEIVE_DATA + RECEIVE_STATUS);
1569 /* schedule BH handler to restart receiver */
1570 info->pending_bh |= BH_RECEIVE;
1571 info->rx_rcc_underrun = 1;
1574 usc_ClearIrqPendingBits( info, MISC );
1575 usc_UnlatchMiscstatusBits( info, status );
1577 } /* end of mgsl_isr_misc() */
1581 * Services undefined interrupt vectors from the
1582 * USC. (hence this function SHOULD never be called)
1584 * Arguments: info pointer to device extension (instance data)
1585 * Return Value: None
1587 static void mgsl_isr_null( struct mgsl_struct *info )
1590 } /* end of mgsl_isr_null() */
1592 /* mgsl_isr_receive_dma()
1594 * Service a receive DMA channel interrupt.
1595 * For this driver there are two sources of receive DMA interrupts
1596 * as identified in the Receive DMA mode Register (RDMR):
1598 * BIT3 EOA/EOL End of List, all receive buffers in receive
1599 * buffer list have been filled (no more free buffers
1600 * available). The DMA controller has shut down.
1602 * BIT2 EOB End of Buffer. This interrupt occurs when a receive
1603 * DMA buffer is terminated in response to completion
1604 * of a good frame or a frame with errors. The status
1605 * of the frame is stored in the buffer entry in the
1606 * list of receive buffer entries.
1608 * Arguments: info pointer to device instance data
1609 * Return Value: None
1611 static void mgsl_isr_receive_dma( struct mgsl_struct *info )
1615 /* clear interrupt pending and IUS bit for Rx DMA IRQ */
1616 usc_OutDmaReg( info, CDIR, BIT9+BIT1 );
1618 /* Read the receive DMA status to identify interrupt type. */
1619 /* This also clears the status bits. */
1620 status = usc_InDmaReg( info, RDMR );
1622 if ( debug_level >= DEBUG_LEVEL_ISR )
1623 printk("%s(%d):mgsl_isr_receive_dma(%s) status=%04X\n",
1624 __FILE__,__LINE__,info->device_name,status);
1626 info->pending_bh |= BH_RECEIVE;
1628 if ( status & BIT3 ) {
1629 info->rx_overflow = 1;
1630 info->icount.buf_overrun++;
1633 } /* end of mgsl_isr_receive_dma() */
1635 /* mgsl_isr_transmit_dma()
1637 * This function services a transmit DMA channel interrupt.
1639 * For this driver there is one source of transmit DMA interrupts
1640 * as identified in the Transmit DMA Mode Register (TDMR):
1642 * BIT2 EOB End of Buffer. This interrupt occurs when a
1643 * transmit DMA buffer has been emptied.
1645 * The driver maintains enough transmit DMA buffers to hold at least
1646 * one max frame size transmit frame. When operating in a buffered
1647 * transmit mode, there may be enough transmit DMA buffers to hold at
1648 * least two or more max frame size frames. On an EOB condition,
1649 * determine if there are any queued transmit buffers and copy into
1650 * transmit DMA buffers if we have room.
1652 * Arguments: info pointer to device instance data
1653 * Return Value: None
1655 static void mgsl_isr_transmit_dma( struct mgsl_struct *info )
1659 /* clear interrupt pending and IUS bit for Tx DMA IRQ */
1660 usc_OutDmaReg(info, CDIR, BIT8+BIT0 );
1662 /* Read the transmit DMA status to identify interrupt type. */
1663 /* This also clears the status bits. */
1665 status = usc_InDmaReg( info, TDMR );
1667 if ( debug_level >= DEBUG_LEVEL_ISR )
1668 printk("%s(%d):mgsl_isr_transmit_dma(%s) status=%04X\n",
1669 __FILE__,__LINE__,info->device_name,status);
1671 if ( status & BIT2 ) {
1672 --info->tx_dma_buffers_used;
1674 /* if there are transmit frames queued,
1675 * try to load the next one
1677 if ( load_next_tx_holding_buffer(info) ) {
1678 /* if call returns non-zero value, we have
1679 * at least one free tx holding buffer
1681 info->pending_bh |= BH_TRANSMIT;
1685 } /* end of mgsl_isr_transmit_dma() */
1689 * Interrupt service routine entry point.
1693 * irq interrupt number that caused interrupt
1694 * dev_id device ID supplied during interrupt registration
1696 * Return Value: None
1698 static irqreturn_t mgsl_interrupt(int dummy, void *dev_id)
1700 struct mgsl_struct *info = dev_id;
1704 if ( debug_level >= DEBUG_LEVEL_ISR )
1705 printk(KERN_DEBUG "%s(%d):mgsl_interrupt(%d)entry.\n",
1706 __FILE__, __LINE__, info->irq_level);
1708 spin_lock(&info->irq_spinlock);
1711 /* Read the interrupt vectors from hardware. */
1712 UscVector = usc_InReg(info, IVR) >> 9;
1713 DmaVector = usc_InDmaReg(info, DIVR);
1715 if ( debug_level >= DEBUG_LEVEL_ISR )
1716 printk("%s(%d):%s UscVector=%08X DmaVector=%08X\n",
1717 __FILE__,__LINE__,info->device_name,UscVector,DmaVector);
1719 if ( !UscVector && !DmaVector )
1722 /* Dispatch interrupt vector */
1724 (*UscIsrTable[UscVector])(info);
1725 else if ( (DmaVector&(BIT10|BIT9)) == BIT10)
1726 mgsl_isr_transmit_dma(info);
1728 mgsl_isr_receive_dma(info);
1730 if ( info->isr_overflow ) {
1731 printk(KERN_ERR "%s(%d):%s isr overflow irq=%d\n",
1732 __FILE__, __LINE__, info->device_name, info->irq_level);
1733 usc_DisableMasterIrqBit(info);
1734 usc_DisableDmaInterrupts(info,DICR_MASTER);
1739 /* Request bottom half processing if there's something
1740 * for it to do and the bh is not already running
1743 if ( info->pending_bh && !info->bh_running && !info->bh_requested ) {
1744 if ( debug_level >= DEBUG_LEVEL_ISR )
1745 printk("%s(%d):%s queueing bh task.\n",
1746 __FILE__,__LINE__,info->device_name);
1747 schedule_work(&info->task);
1748 info->bh_requested = 1;
1751 spin_unlock(&info->irq_spinlock);
1753 if ( debug_level >= DEBUG_LEVEL_ISR )
1754 printk(KERN_DEBUG "%s(%d):mgsl_interrupt(%d)exit.\n",
1755 __FILE__, __LINE__, info->irq_level);
1758 } /* end of mgsl_interrupt() */
1762 * Initialize and start device.
1764 * Arguments: info pointer to device instance data
1765 * Return Value: 0 if success, otherwise error code
1767 static int startup(struct mgsl_struct * info)
1771 if ( debug_level >= DEBUG_LEVEL_INFO )
1772 printk("%s(%d):mgsl_startup(%s)\n",__FILE__,__LINE__,info->device_name);
1774 if (info->flags & ASYNC_INITIALIZED)
1777 if (!info->xmit_buf) {
1778 /* allocate a page of memory for a transmit buffer */
1779 info->xmit_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL);
1780 if (!info->xmit_buf) {
1781 printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n",
1782 __FILE__,__LINE__,info->device_name);
1787 info->pending_bh = 0;
1789 memset(&info->icount, 0, sizeof(info->icount));
1791 setup_timer(&info->tx_timer, mgsl_tx_timeout, (unsigned long)info);
1793 /* Allocate and claim adapter resources */
1794 retval = mgsl_claim_resources(info);
1796 /* perform existence check and diagnostics */
1798 retval = mgsl_adapter_test(info);
1801 if (capable(CAP_SYS_ADMIN) && info->tty)
1802 set_bit(TTY_IO_ERROR, &info->tty->flags);
1803 mgsl_release_resources(info);
1807 /* program hardware for current parameters */
1808 mgsl_change_params(info);
1811 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1813 info->flags |= ASYNC_INITIALIZED;
1817 } /* end of startup() */
1821 * Called by mgsl_close() and mgsl_hangup() to shutdown hardware
1823 * Arguments: info pointer to device instance data
1824 * Return Value: None
1826 static void shutdown(struct mgsl_struct * info)
1828 unsigned long flags;
1830 if (!(info->flags & ASYNC_INITIALIZED))
1833 if (debug_level >= DEBUG_LEVEL_INFO)
1834 printk("%s(%d):mgsl_shutdown(%s)\n",
1835 __FILE__,__LINE__, info->device_name );
1837 /* clear status wait queue because status changes */
1838 /* can't happen after shutting down the hardware */
1839 wake_up_interruptible(&info->status_event_wait_q);
1840 wake_up_interruptible(&info->event_wait_q);
1842 del_timer_sync(&info->tx_timer);
1844 if (info->xmit_buf) {
1845 free_page((unsigned long) info->xmit_buf);
1846 info->xmit_buf = NULL;
1849 spin_lock_irqsave(&info->irq_spinlock,flags);
1850 usc_DisableMasterIrqBit(info);
1851 usc_stop_receiver(info);
1852 usc_stop_transmitter(info);
1853 usc_DisableInterrupts(info,RECEIVE_DATA + RECEIVE_STATUS +
1854 TRANSMIT_DATA + TRANSMIT_STATUS + IO_PIN + MISC );
1855 usc_DisableDmaInterrupts(info,DICR_MASTER + DICR_TRANSMIT + DICR_RECEIVE);
1857 /* Disable DMAEN (Port 7, Bit 14) */
1858 /* This disconnects the DMA request signal from the ISA bus */
1859 /* on the ISA adapter. This has no effect for the PCI adapter */
1860 usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT15) | BIT14));
1862 /* Disable INTEN (Port 6, Bit12) */
1863 /* This disconnects the IRQ request signal to the ISA bus */
1864 /* on the ISA adapter. This has no effect for the PCI adapter */
1865 usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT13) | BIT12));
1867 if (!info->tty || info->tty->termios->c_cflag & HUPCL) {
1868 info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
1869 usc_set_serial_signals(info);
1872 spin_unlock_irqrestore(&info->irq_spinlock,flags);
1874 mgsl_release_resources(info);
1877 set_bit(TTY_IO_ERROR, &info->tty->flags);
1879 info->flags &= ~ASYNC_INITIALIZED;
1881 } /* end of shutdown() */
1883 static void mgsl_program_hw(struct mgsl_struct *info)
1885 unsigned long flags;
1887 spin_lock_irqsave(&info->irq_spinlock,flags);
1889 usc_stop_receiver(info);
1890 usc_stop_transmitter(info);
1891 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1893 if (info->params.mode == MGSL_MODE_HDLC ||
1894 info->params.mode == MGSL_MODE_RAW ||
1896 usc_set_sync_mode(info);
1898 usc_set_async_mode(info);
1900 usc_set_serial_signals(info);
1902 info->dcd_chkcount = 0;
1903 info->cts_chkcount = 0;
1904 info->ri_chkcount = 0;
1905 info->dsr_chkcount = 0;
1907 usc_EnableStatusIrqs(info,SICR_CTS+SICR_DSR+SICR_DCD+SICR_RI);
1908 usc_EnableInterrupts(info, IO_PIN);
1909 usc_get_serial_signals(info);
1911 if (info->netcount || info->tty->termios->c_cflag & CREAD)
1912 usc_start_receiver(info);
1914 spin_unlock_irqrestore(&info->irq_spinlock,flags);
1917 /* Reconfigure adapter based on new parameters
1919 static void mgsl_change_params(struct mgsl_struct *info)
1924 if (!info->tty || !info->tty->termios)
1927 if (debug_level >= DEBUG_LEVEL_INFO)
1928 printk("%s(%d):mgsl_change_params(%s)\n",
1929 __FILE__,__LINE__, info->device_name );
1931 cflag = info->tty->termios->c_cflag;
1933 /* if B0 rate (hangup) specified then negate DTR and RTS */
1934 /* otherwise assert DTR and RTS */
1936 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
1938 info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
1940 /* byte size and parity */
1942 switch (cflag & CSIZE) {
1943 case CS5: info->params.data_bits = 5; break;
1944 case CS6: info->params.data_bits = 6; break;
1945 case CS7: info->params.data_bits = 7; break;
1946 case CS8: info->params.data_bits = 8; break;
1947 /* Never happens, but GCC is too dumb to figure it out */
1948 default: info->params.data_bits = 7; break;
1952 info->params.stop_bits = 2;
1954 info->params.stop_bits = 1;
1956 info->params.parity = ASYNC_PARITY_NONE;
1957 if (cflag & PARENB) {
1959 info->params.parity = ASYNC_PARITY_ODD;
1961 info->params.parity = ASYNC_PARITY_EVEN;
1964 info->params.parity = ASYNC_PARITY_SPACE;
1968 /* calculate number of jiffies to transmit a full
1969 * FIFO (32 bytes) at specified data rate
1971 bits_per_char = info->params.data_bits +
1972 info->params.stop_bits + 1;
1974 /* if port data rate is set to 460800 or less then
1975 * allow tty settings to override, otherwise keep the
1976 * current data rate.
1978 if (info->params.data_rate <= 460800)
1979 info->params.data_rate = tty_get_baud_rate(info->tty);
1981 if ( info->params.data_rate ) {
1982 info->timeout = (32*HZ*bits_per_char) /
1983 info->params.data_rate;
1985 info->timeout += HZ/50; /* Add .02 seconds of slop */
1987 if (cflag & CRTSCTS)
1988 info->flags |= ASYNC_CTS_FLOW;
1990 info->flags &= ~ASYNC_CTS_FLOW;
1993 info->flags &= ~ASYNC_CHECK_CD;
1995 info->flags |= ASYNC_CHECK_CD;
1997 /* process tty input control flags */
1999 info->read_status_mask = RXSTATUS_OVERRUN;
2000 if (I_INPCK(info->tty))
2001 info->read_status_mask |= RXSTATUS_PARITY_ERROR | RXSTATUS_FRAMING_ERROR;
2002 if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
2003 info->read_status_mask |= RXSTATUS_BREAK_RECEIVED;
2005 if (I_IGNPAR(info->tty))
2006 info->ignore_status_mask |= RXSTATUS_PARITY_ERROR | RXSTATUS_FRAMING_ERROR;
2007 if (I_IGNBRK(info->tty)) {
2008 info->ignore_status_mask |= RXSTATUS_BREAK_RECEIVED;
2009 /* If ignoring parity and break indicators, ignore
2010 * overruns too. (For real raw support).
2012 if (I_IGNPAR(info->tty))
2013 info->ignore_status_mask |= RXSTATUS_OVERRUN;
2016 mgsl_program_hw(info);
2018 } /* end of mgsl_change_params() */
2022 * Add a character to the transmit buffer.
2024 * Arguments: tty pointer to tty information structure
2025 * ch character to add to transmit buffer
2027 * Return Value: None
2029 static void mgsl_put_char(struct tty_struct *tty, unsigned char ch)
2031 struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
2032 unsigned long flags;
2034 if ( debug_level >= DEBUG_LEVEL_INFO ) {
2035 printk( "%s(%d):mgsl_put_char(%d) on %s\n",
2036 __FILE__,__LINE__,ch,info->device_name);
2039 if (mgsl_paranoia_check(info, tty->name, "mgsl_put_char"))
2042 if (!tty || !info->xmit_buf)
2045 spin_lock_irqsave(&info->irq_spinlock,flags);
2047 if ( (info->params.mode == MGSL_MODE_ASYNC ) || !info->tx_active ) {
2049 if (info->xmit_cnt < SERIAL_XMIT_SIZE - 1) {
2050 info->xmit_buf[info->xmit_head++] = ch;
2051 info->xmit_head &= SERIAL_XMIT_SIZE-1;
2056 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2058 } /* end of mgsl_put_char() */
2060 /* mgsl_flush_chars()
2062 * Enable transmitter so remaining characters in the
2063 * transmit buffer are sent.
2065 * Arguments: tty pointer to tty information structure
2066 * Return Value: None
2068 static void mgsl_flush_chars(struct tty_struct *tty)
2070 struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
2071 unsigned long flags;
2073 if ( debug_level >= DEBUG_LEVEL_INFO )
2074 printk( "%s(%d):mgsl_flush_chars() entry on %s xmit_cnt=%d\n",
2075 __FILE__,__LINE__,info->device_name,info->xmit_cnt);
2077 if (mgsl_paranoia_check(info, tty->name, "mgsl_flush_chars"))
2080 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2084 if ( debug_level >= DEBUG_LEVEL_INFO )
2085 printk( "%s(%d):mgsl_flush_chars() entry on %s starting transmitter\n",
2086 __FILE__,__LINE__,info->device_name );
2088 spin_lock_irqsave(&info->irq_spinlock,flags);
2090 if (!info->tx_active) {
2091 if ( (info->params.mode == MGSL_MODE_HDLC ||
2092 info->params.mode == MGSL_MODE_RAW) && info->xmit_cnt ) {
2093 /* operating in synchronous (frame oriented) mode */
2094 /* copy data from circular xmit_buf to */
2095 /* transmit DMA buffer. */
2096 mgsl_load_tx_dma_buffer(info,
2097 info->xmit_buf,info->xmit_cnt);
2099 usc_start_transmitter(info);
2102 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2104 } /* end of mgsl_flush_chars() */
2108 * Send a block of data
2112 * tty pointer to tty information structure
2113 * buf pointer to buffer containing send data
2114 * count size of send data in bytes
2116 * Return Value: number of characters written
2118 static int mgsl_write(struct tty_struct * tty,
2119 const unsigned char *buf, int count)
2122 struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
2123 unsigned long flags;
2125 if ( debug_level >= DEBUG_LEVEL_INFO )
2126 printk( "%s(%d):mgsl_write(%s) count=%d\n",
2127 __FILE__,__LINE__,info->device_name,count);
2129 if (mgsl_paranoia_check(info, tty->name, "mgsl_write"))
2132 if (!tty || !info->xmit_buf)
2135 if ( info->params.mode == MGSL_MODE_HDLC ||
2136 info->params.mode == MGSL_MODE_RAW ) {
2137 /* operating in synchronous (frame oriented) mode */
2138 /* operating in synchronous (frame oriented) mode */
2139 if (info->tx_active) {
2141 if ( info->params.mode == MGSL_MODE_HDLC ) {
2145 /* transmitter is actively sending data -
2146 * if we have multiple transmit dma and
2147 * holding buffers, attempt to queue this
2148 * frame for transmission at a later time.
2150 if (info->tx_holding_count >= info->num_tx_holding_buffers ) {
2151 /* no tx holding buffers available */
2156 /* queue transmit frame request */
2158 save_tx_buffer_request(info,buf,count);
2160 /* if we have sufficient tx dma buffers,
2161 * load the next buffered tx request
2163 spin_lock_irqsave(&info->irq_spinlock,flags);
2164 load_next_tx_holding_buffer(info);
2165 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2169 /* if operating in HDLC LoopMode and the adapter */
2170 /* has yet to be inserted into the loop, we can't */
2173 if ( (info->params.flags & HDLC_FLAG_HDLC_LOOPMODE) &&
2174 !usc_loopmode_active(info) )
2180 if ( info->xmit_cnt ) {
2181 /* Send accumulated from send_char() calls */
2182 /* as frame and wait before accepting more data. */
2185 /* copy data from circular xmit_buf to */
2186 /* transmit DMA buffer. */
2187 mgsl_load_tx_dma_buffer(info,
2188 info->xmit_buf,info->xmit_cnt);
2189 if ( debug_level >= DEBUG_LEVEL_INFO )
2190 printk( "%s(%d):mgsl_write(%s) sync xmit_cnt flushing\n",
2191 __FILE__,__LINE__,info->device_name);
2193 if ( debug_level >= DEBUG_LEVEL_INFO )
2194 printk( "%s(%d):mgsl_write(%s) sync transmit accepted\n",
2195 __FILE__,__LINE__,info->device_name);
2197 info->xmit_cnt = count;
2198 mgsl_load_tx_dma_buffer(info,buf,count);
2202 spin_lock_irqsave(&info->irq_spinlock,flags);
2203 c = min_t(int, count,
2204 min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
2205 SERIAL_XMIT_SIZE - info->xmit_head));
2207 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2210 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2211 info->xmit_head = ((info->xmit_head + c) &
2212 (SERIAL_XMIT_SIZE-1));
2213 info->xmit_cnt += c;
2214 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2221 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2222 spin_lock_irqsave(&info->irq_spinlock,flags);
2223 if (!info->tx_active)
2224 usc_start_transmitter(info);
2225 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2228 if ( debug_level >= DEBUG_LEVEL_INFO )
2229 printk( "%s(%d):mgsl_write(%s) returning=%d\n",
2230 __FILE__,__LINE__,info->device_name,ret);
2234 } /* end of mgsl_write() */
2236 /* mgsl_write_room()
2238 * Return the count of free bytes in transmit buffer
2240 * Arguments: tty pointer to tty info structure
2241 * Return Value: None
2243 static int mgsl_write_room(struct tty_struct *tty)
2245 struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
2248 if (mgsl_paranoia_check(info, tty->name, "mgsl_write_room"))
2250 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2254 if (debug_level >= DEBUG_LEVEL_INFO)
2255 printk("%s(%d):mgsl_write_room(%s)=%d\n",
2256 __FILE__,__LINE__, info->device_name,ret );
2258 if ( info->params.mode == MGSL_MODE_HDLC ||
2259 info->params.mode == MGSL_MODE_RAW ) {
2260 /* operating in synchronous (frame oriented) mode */
2261 if ( info->tx_active )
2264 return HDLC_MAX_FRAME_SIZE;
2269 } /* end of mgsl_write_room() */
2271 /* mgsl_chars_in_buffer()
2273 * Return the count of bytes in transmit buffer
2275 * Arguments: tty pointer to tty info structure
2276 * Return Value: None
2278 static int mgsl_chars_in_buffer(struct tty_struct *tty)
2280 struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
2282 if (debug_level >= DEBUG_LEVEL_INFO)
2283 printk("%s(%d):mgsl_chars_in_buffer(%s)\n",
2284 __FILE__,__LINE__, info->device_name );
2286 if (mgsl_paranoia_check(info, tty->name, "mgsl_chars_in_buffer"))
2289 if (debug_level >= DEBUG_LEVEL_INFO)
2290 printk("%s(%d):mgsl_chars_in_buffer(%s)=%d\n",
2291 __FILE__,__LINE__, info->device_name,info->xmit_cnt );
2293 if ( info->params.mode == MGSL_MODE_HDLC ||
2294 info->params.mode == MGSL_MODE_RAW ) {
2295 /* operating in synchronous (frame oriented) mode */
2296 if ( info->tx_active )
2297 return info->max_frame_size;
2302 return info->xmit_cnt;
2303 } /* end of mgsl_chars_in_buffer() */
2305 /* mgsl_flush_buffer()
2307 * Discard all data in the send buffer
2309 * Arguments: tty pointer to tty info structure
2310 * Return Value: None
2312 static void mgsl_flush_buffer(struct tty_struct *tty)
2314 struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
2315 unsigned long flags;
2317 if (debug_level >= DEBUG_LEVEL_INFO)
2318 printk("%s(%d):mgsl_flush_buffer(%s) entry\n",
2319 __FILE__,__LINE__, info->device_name );
2321 if (mgsl_paranoia_check(info, tty->name, "mgsl_flush_buffer"))
2324 spin_lock_irqsave(&info->irq_spinlock,flags);
2325 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2326 del_timer(&info->tx_timer);
2327 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2332 /* mgsl_send_xchar()
2334 * Send a high-priority XON/XOFF character
2336 * Arguments: tty pointer to tty info structure
2337 * ch character to send
2338 * Return Value: None
2340 static void mgsl_send_xchar(struct tty_struct *tty, char ch)
2342 struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
2343 unsigned long flags;
2345 if (debug_level >= DEBUG_LEVEL_INFO)
2346 printk("%s(%d):mgsl_send_xchar(%s,%d)\n",
2347 __FILE__,__LINE__, info->device_name, ch );
2349 if (mgsl_paranoia_check(info, tty->name, "mgsl_send_xchar"))
2354 /* Make sure transmit interrupts are on */
2355 spin_lock_irqsave(&info->irq_spinlock,flags);
2356 if (!info->tx_enabled)
2357 usc_start_transmitter(info);
2358 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2360 } /* end of mgsl_send_xchar() */
2364 * Signal remote device to throttle send data (our receive data)
2366 * Arguments: tty pointer to tty info structure
2367 * Return Value: None
2369 static void mgsl_throttle(struct tty_struct * tty)
2371 struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
2372 unsigned long flags;
2374 if (debug_level >= DEBUG_LEVEL_INFO)
2375 printk("%s(%d):mgsl_throttle(%s) entry\n",
2376 __FILE__,__LINE__, info->device_name );
2378 if (mgsl_paranoia_check(info, tty->name, "mgsl_throttle"))
2382 mgsl_send_xchar(tty, STOP_CHAR(tty));
2384 if (tty->termios->c_cflag & CRTSCTS) {
2385 spin_lock_irqsave(&info->irq_spinlock,flags);
2386 info->serial_signals &= ~SerialSignal_RTS;
2387 usc_set_serial_signals(info);
2388 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2390 } /* end of mgsl_throttle() */
2392 /* mgsl_unthrottle()
2394 * Signal remote device to stop throttling send data (our receive data)
2396 * Arguments: tty pointer to tty info structure
2397 * Return Value: None
2399 static void mgsl_unthrottle(struct tty_struct * tty)
2401 struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
2402 unsigned long flags;
2404 if (debug_level >= DEBUG_LEVEL_INFO)
2405 printk("%s(%d):mgsl_unthrottle(%s) entry\n",
2406 __FILE__,__LINE__, info->device_name );
2408 if (mgsl_paranoia_check(info, tty->name, "mgsl_unthrottle"))
2415 mgsl_send_xchar(tty, START_CHAR(tty));
2418 if (tty->termios->c_cflag & CRTSCTS) {
2419 spin_lock_irqsave(&info->irq_spinlock,flags);
2420 info->serial_signals |= SerialSignal_RTS;
2421 usc_set_serial_signals(info);
2422 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2425 } /* end of mgsl_unthrottle() */
2429 * get the current serial parameters information
2431 * Arguments: info pointer to device instance data
2432 * user_icount pointer to buffer to hold returned stats
2434 * Return Value: 0 if success, otherwise error code
2436 static int mgsl_get_stats(struct mgsl_struct * info, struct mgsl_icount __user *user_icount)
2440 if (debug_level >= DEBUG_LEVEL_INFO)
2441 printk("%s(%d):mgsl_get_params(%s)\n",
2442 __FILE__,__LINE__, info->device_name);
2445 memset(&info->icount, 0, sizeof(info->icount));
2447 COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount));
2454 } /* end of mgsl_get_stats() */
2456 /* mgsl_get_params()
2458 * get the current serial parameters information
2460 * Arguments: info pointer to device instance data
2461 * user_params pointer to buffer to hold returned params
2463 * Return Value: 0 if success, otherwise error code
2465 static int mgsl_get_params(struct mgsl_struct * info, MGSL_PARAMS __user *user_params)
2468 if (debug_level >= DEBUG_LEVEL_INFO)
2469 printk("%s(%d):mgsl_get_params(%s)\n",
2470 __FILE__,__LINE__, info->device_name);
2472 COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS));
2474 if ( debug_level >= DEBUG_LEVEL_INFO )
2475 printk( "%s(%d):mgsl_get_params(%s) user buffer copy failed\n",
2476 __FILE__,__LINE__,info->device_name);
2482 } /* end of mgsl_get_params() */
2484 /* mgsl_set_params()
2486 * set the serial parameters
2490 * info pointer to device instance data
2491 * new_params user buffer containing new serial params
2493 * Return Value: 0 if success, otherwise error code
2495 static int mgsl_set_params(struct mgsl_struct * info, MGSL_PARAMS __user *new_params)
2497 unsigned long flags;
2498 MGSL_PARAMS tmp_params;
2501 if (debug_level >= DEBUG_LEVEL_INFO)
2502 printk("%s(%d):mgsl_set_params %s\n", __FILE__,__LINE__,
2503 info->device_name );
2504 COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS));
2506 if ( debug_level >= DEBUG_LEVEL_INFO )
2507 printk( "%s(%d):mgsl_set_params(%s) user buffer copy failed\n",
2508 __FILE__,__LINE__,info->device_name);
2512 spin_lock_irqsave(&info->irq_spinlock,flags);
2513 memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS));
2514 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2516 mgsl_change_params(info);
2520 } /* end of mgsl_set_params() */
2522 /* mgsl_get_txidle()
2524 * get the current transmit idle mode
2526 * Arguments: info pointer to device instance data
2527 * idle_mode pointer to buffer to hold returned idle mode
2529 * Return Value: 0 if success, otherwise error code
2531 static int mgsl_get_txidle(struct mgsl_struct * info, int __user *idle_mode)
2535 if (debug_level >= DEBUG_LEVEL_INFO)
2536 printk("%s(%d):mgsl_get_txidle(%s)=%d\n",
2537 __FILE__,__LINE__, info->device_name, info->idle_mode);
2539 COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int));
2541 if ( debug_level >= DEBUG_LEVEL_INFO )
2542 printk( "%s(%d):mgsl_get_txidle(%s) user buffer copy failed\n",
2543 __FILE__,__LINE__,info->device_name);
2549 } /* end of mgsl_get_txidle() */
2551 /* mgsl_set_txidle() service ioctl to set transmit idle mode
2553 * Arguments: info pointer to device instance data
2554 * idle_mode new idle mode
2556 * Return Value: 0 if success, otherwise error code
2558 static int mgsl_set_txidle(struct mgsl_struct * info, int idle_mode)
2560 unsigned long flags;
2562 if (debug_level >= DEBUG_LEVEL_INFO)
2563 printk("%s(%d):mgsl_set_txidle(%s,%d)\n", __FILE__,__LINE__,
2564 info->device_name, idle_mode );
2566 spin_lock_irqsave(&info->irq_spinlock,flags);
2567 info->idle_mode = idle_mode;
2568 usc_set_txidle( info );
2569 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2572 } /* end of mgsl_set_txidle() */
2576 * enable or disable the transmitter
2580 * info pointer to device instance data
2581 * enable 1 = enable, 0 = disable
2583 * Return Value: 0 if success, otherwise error code
2585 static int mgsl_txenable(struct mgsl_struct * info, int enable)
2587 unsigned long flags;
2589 if (debug_level >= DEBUG_LEVEL_INFO)
2590 printk("%s(%d):mgsl_txenable(%s,%d)\n", __FILE__,__LINE__,
2591 info->device_name, enable);
2593 spin_lock_irqsave(&info->irq_spinlock,flags);
2595 if ( !info->tx_enabled ) {
2597 usc_start_transmitter(info);
2598 /*--------------------------------------------------
2599 * if HDLC/SDLC Loop mode, attempt to insert the
2600 * station in the 'loop' by setting CMR:13. Upon
2601 * receipt of the next GoAhead (RxAbort) sequence,
2602 * the OnLoop indicator (CCSR:7) should go active
2603 * to indicate that we are on the loop
2604 *--------------------------------------------------*/
2605 if ( info->params.flags & HDLC_FLAG_HDLC_LOOPMODE )
2606 usc_loopmode_insert_request( info );
2609 if ( info->tx_enabled )
2610 usc_stop_transmitter(info);
2612 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2615 } /* end of mgsl_txenable() */
2617 /* mgsl_txabort() abort send HDLC frame
2619 * Arguments: info pointer to device instance data
2620 * Return Value: 0 if success, otherwise error code
2622 static int mgsl_txabort(struct mgsl_struct * info)
2624 unsigned long flags;
2626 if (debug_level >= DEBUG_LEVEL_INFO)
2627 printk("%s(%d):mgsl_txabort(%s)\n", __FILE__,__LINE__,
2630 spin_lock_irqsave(&info->irq_spinlock,flags);
2631 if ( info->tx_active && info->params.mode == MGSL_MODE_HDLC )
2633 if ( info->params.flags & HDLC_FLAG_HDLC_LOOPMODE )
2634 usc_loopmode_cancel_transmit( info );
2636 usc_TCmd(info,TCmd_SendAbort);
2638 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2641 } /* end of mgsl_txabort() */
2643 /* mgsl_rxenable() enable or disable the receiver
2645 * Arguments: info pointer to device instance data
2646 * enable 1 = enable, 0 = disable
2647 * Return Value: 0 if success, otherwise error code
2649 static int mgsl_rxenable(struct mgsl_struct * info, int enable)
2651 unsigned long flags;
2653 if (debug_level >= DEBUG_LEVEL_INFO)
2654 printk("%s(%d):mgsl_rxenable(%s,%d)\n", __FILE__,__LINE__,
2655 info->device_name, enable);
2657 spin_lock_irqsave(&info->irq_spinlock,flags);
2659 if ( !info->rx_enabled )
2660 usc_start_receiver(info);
2662 if ( info->rx_enabled )
2663 usc_stop_receiver(info);
2665 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2668 } /* end of mgsl_rxenable() */
2670 /* mgsl_wait_event() wait for specified event to occur
2672 * Arguments: info pointer to device instance data
2673 * mask pointer to bitmask of events to wait for
2674 * Return Value: 0 if successful and bit mask updated with
2675 * of events triggerred,
2676 * otherwise error code
2678 static int mgsl_wait_event(struct mgsl_struct * info, int __user * mask_ptr)
2680 unsigned long flags;
2683 struct mgsl_icount cprev, cnow;
2686 struct _input_signal_events oldsigs, newsigs;
2687 DECLARE_WAITQUEUE(wait, current);
2689 COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int));
2694 if (debug_level >= DEBUG_LEVEL_INFO)
2695 printk("%s(%d):mgsl_wait_event(%s,%d)\n", __FILE__,__LINE__,
2696 info->device_name, mask);
2698 spin_lock_irqsave(&info->irq_spinlock,flags);
2700 /* return immediately if state matches requested events */
2701 usc_get_serial_signals(info);
2702 s = info->serial_signals;
2704 ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) +
2705 ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) +
2706 ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) +
2707 ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) );
2709 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2713 /* save current irq counts */
2714 cprev = info->icount;
2715 oldsigs = info->input_signal_events;
2717 /* enable hunt and idle irqs if needed */
2718 if (mask & (MgslEvent_ExitHuntMode + MgslEvent_IdleReceived)) {
2719 u16 oldreg = usc_InReg(info,RICR);
2720 u16 newreg = oldreg +
2721 (mask & MgslEvent_ExitHuntMode ? RXSTATUS_EXITED_HUNT:0) +
2722 (mask & MgslEvent_IdleReceived ? RXSTATUS_IDLE_RECEIVED:0);
2723 if (oldreg != newreg)
2724 usc_OutReg(info, RICR, newreg);
2727 set_current_state(TASK_INTERRUPTIBLE);
2728 add_wait_queue(&info->event_wait_q, &wait);
2730 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2735 if (signal_pending(current)) {
2740 /* get current irq counts */
2741 spin_lock_irqsave(&info->irq_spinlock,flags);
2742 cnow = info->icount;
2743 newsigs = info->input_signal_events;
2744 set_current_state(TASK_INTERRUPTIBLE);
2745 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2747 /* if no change, wait aborted for some reason */
2748 if (newsigs.dsr_up == oldsigs.dsr_up &&
2749 newsigs.dsr_down == oldsigs.dsr_down &&
2750 newsigs.dcd_up == oldsigs.dcd_up &&
2751 newsigs.dcd_down == oldsigs.dcd_down &&
2752 newsigs.cts_up == oldsigs.cts_up &&
2753 newsigs.cts_down == oldsigs.cts_down &&
2754 newsigs.ri_up == oldsigs.ri_up &&
2755 newsigs.ri_down == oldsigs.ri_down &&
2756 cnow.exithunt == cprev.exithunt &&
2757 cnow.rxidle == cprev.rxidle) {
2763 ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) +
2764 (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) +
2765 (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) +
2766 (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) +
2767 (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) +
2768 (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) +
2769 (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) +
2770 (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) +
2771 (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) +
2772 (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) );
2780 remove_wait_queue(&info->event_wait_q, &wait);
2781 set_current_state(TASK_RUNNING);
2783 if (mask & (MgslEvent_ExitHuntMode + MgslEvent_IdleReceived)) {
2784 spin_lock_irqsave(&info->irq_spinlock,flags);
2785 if (!waitqueue_active(&info->event_wait_q)) {
2786 /* disable enable exit hunt mode/idle rcvd IRQs */
2787 usc_OutReg(info, RICR, usc_InReg(info,RICR) &
2788 ~(RXSTATUS_EXITED_HUNT + RXSTATUS_IDLE_RECEIVED));
2790 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2794 PUT_USER(rc, events, mask_ptr);
2798 } /* end of mgsl_wait_event() */
2800 static int modem_input_wait(struct mgsl_struct *info,int arg)
2802 unsigned long flags;
2804 struct mgsl_icount cprev, cnow;
2805 DECLARE_WAITQUEUE(wait, current);
2807 /* save current irq counts */
2808 spin_lock_irqsave(&info->irq_spinlock,flags);
2809 cprev = info->icount;
2810 add_wait_queue(&info->status_event_wait_q, &wait);
2811 set_current_state(TASK_INTERRUPTIBLE);
2812 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2816 if (signal_pending(current)) {
2821 /* get new irq counts */
2822 spin_lock_irqsave(&info->irq_spinlock,flags);
2823 cnow = info->icount;
2824 set_current_state(TASK_INTERRUPTIBLE);
2825 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2827 /* if no change, wait aborted for some reason */
2828 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2829 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
2834 /* check for change in caller specified modem input */
2835 if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) ||
2836 (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) ||
2837 (arg & TIOCM_CD && cnow.dcd != cprev.dcd) ||
2838 (arg & TIOCM_CTS && cnow.cts != cprev.cts)) {
2845 remove_wait_queue(&info->status_event_wait_q, &wait);
2846 set_current_state(TASK_RUNNING);
2850 /* return the state of the serial control and status signals
2852 static int tiocmget(struct tty_struct *tty, struct file *file)
2854 struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
2855 unsigned int result;
2856 unsigned long flags;
2858 spin_lock_irqsave(&info->irq_spinlock,flags);
2859 usc_get_serial_signals(info);
2860 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2862 result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) +
2863 ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) +
2864 ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) +
2865 ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) +
2866 ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) +
2867 ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0);
2869 if (debug_level >= DEBUG_LEVEL_INFO)
2870 printk("%s(%d):%s tiocmget() value=%08X\n",
2871 __FILE__,__LINE__, info->device_name, result );
2875 /* set modem control signals (DTR/RTS)
2877 static int tiocmset(struct tty_struct *tty, struct file *file,
2878 unsigned int set, unsigned int clear)
2880 struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
2881 unsigned long flags;
2883 if (debug_level >= DEBUG_LEVEL_INFO)
2884 printk("%s(%d):%s tiocmset(%x,%x)\n",
2885 __FILE__,__LINE__,info->device_name, set, clear);
2887 if (set & TIOCM_RTS)
2888 info->serial_signals |= SerialSignal_RTS;
2889 if (set & TIOCM_DTR)
2890 info->serial_signals |= SerialSignal_DTR;
2891 if (clear & TIOCM_RTS)
2892 info->serial_signals &= ~SerialSignal_RTS;
2893 if (clear & TIOCM_DTR)
2894 info->serial_signals &= ~SerialSignal_DTR;
2896 spin_lock_irqsave(&info->irq_spinlock,flags);
2897 usc_set_serial_signals(info);
2898 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2903 /* mgsl_break() Set or clear transmit break condition
2905 * Arguments: tty pointer to tty instance data
2906 * break_state -1=set break condition, 0=clear
2907 * Return Value: None
2909 static void mgsl_break(struct tty_struct *tty, int break_state)
2911 struct mgsl_struct * info = (struct mgsl_struct *)tty->driver_data;
2912 unsigned long flags;
2914 if (debug_level >= DEBUG_LEVEL_INFO)
2915 printk("%s(%d):mgsl_break(%s,%d)\n",
2916 __FILE__,__LINE__, info->device_name, break_state);
2918 if (mgsl_paranoia_check(info, tty->name, "mgsl_break"))
2921 spin_lock_irqsave(&info->irq_spinlock,flags);
2922 if (break_state == -1)
2923 usc_OutReg(info,IOCR,(u16)(usc_InReg(info,IOCR) | BIT7));
2925 usc_OutReg(info,IOCR,(u16)(usc_InReg(info,IOCR) & ~BIT7));
2926 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2928 } /* end of mgsl_break() */
2930 /* mgsl_ioctl() Service an IOCTL request
2934 * tty pointer to tty instance data
2935 * file pointer to associated file object for device
2936 * cmd IOCTL command code
2937 * arg command argument/context
2939 * Return Value: 0 if success, otherwise error code
2941 static int mgsl_ioctl(struct tty_struct *tty, struct file * file,
2942 unsigned int cmd, unsigned long arg)
2944 struct mgsl_struct * info = (struct mgsl_struct *)tty->driver_data;
2946 if (debug_level >= DEBUG_LEVEL_INFO)
2947 printk("%s(%d):mgsl_ioctl %s cmd=%08X\n", __FILE__,__LINE__,
2948 info->device_name, cmd );
2950 if (mgsl_paranoia_check(info, tty->name, "mgsl_ioctl"))
2953 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
2954 (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
2955 if (tty->flags & (1 << TTY_IO_ERROR))
2959 return mgsl_ioctl_common(info, cmd, arg);
2962 static int mgsl_ioctl_common(struct mgsl_struct *info, unsigned int cmd, unsigned long arg)
2965 struct mgsl_icount cnow; /* kernel counter temps */
2966 void __user *argp = (void __user *)arg;
2967 struct serial_icounter_struct __user *p_cuser; /* user space */
2968 unsigned long flags;
2971 case MGSL_IOCGPARAMS:
2972 return mgsl_get_params(info, argp);
2973 case MGSL_IOCSPARAMS:
2974 return mgsl_set_params(info, argp);
2975 case MGSL_IOCGTXIDLE:
2976 return mgsl_get_txidle(info, argp);
2977 case MGSL_IOCSTXIDLE:
2978 return mgsl_set_txidle(info,(int)arg);
2979 case MGSL_IOCTXENABLE:
2980 return mgsl_txenable(info,(int)arg);
2981 case MGSL_IOCRXENABLE:
2982 return mgsl_rxenable(info,(int)arg);
2983 case MGSL_IOCTXABORT:
2984 return mgsl_txabort(info);
2985 case MGSL_IOCGSTATS:
2986 return mgsl_get_stats(info, argp);
2987 case MGSL_IOCWAITEVENT:
2988 return mgsl_wait_event(info, argp);
2989 case MGSL_IOCLOOPTXDONE:
2990 return mgsl_loopmode_send_done(info);
2991 /* Wait for modem input (DCD,RI,DSR,CTS) change
2992 * as specified by mask in arg (TIOCM_RNG/DSR/CD/CTS)
2995 return modem_input_wait(info,(int)arg);
2998 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
2999 * Return: write counters to the user passed counter struct
3000 * NB: both 1->0 and 0->1 transitions are counted except for
3001 * RI where only 0->1 is counted.
3004 spin_lock_irqsave(&info->irq_spinlock,flags);
3005 cnow = info->icount;
3006 spin_unlock_irqrestore(&info->irq_spinlock,flags);
3008 PUT_USER(error,cnow.cts, &p_cuser->cts);
3009 if (error) return error;
3010 PUT_USER(error,cnow.dsr, &p_cuser->dsr);
3011 if (error) return error;
3012 PUT_USER(error,cnow.rng, &p_cuser->rng);
3013 if (error) return error;
3014 PUT_USER(error,cnow.dcd, &p_cuser->dcd);
3015 if (error) return error;
3016 PUT_USER(error,cnow.rx, &p_cuser->rx);
3017 if (error) return error;
3018 PUT_USER(error,cnow.tx, &p_cuser->tx);
3019 if (error) return error;
3020 PUT_USER(error,cnow.frame, &p_cuser->frame);
3021 if (error) return error;
3022 PUT_USER(error,cnow.overrun, &p_cuser->overrun);
3023 if (error) return error;
3024 PUT_USER(error,cnow.parity, &p_cuser->parity);
3025 if (error) return error;
3026 PUT_USER(error,cnow.brk, &p_cuser->brk);
3027 if (error) return error;
3028 PUT_USER(error,cnow.buf_overrun, &p_cuser->buf_overrun);
3029 if (error) return error;
3032 return -ENOIOCTLCMD;
3037 /* mgsl_set_termios()
3039 * Set new termios settings
3043 * tty pointer to tty structure
3044 * termios pointer to buffer to hold returned old termios
3046 * Return Value: None
3048 static void mgsl_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
3050 struct mgsl_struct *info = (struct mgsl_struct *)tty->driver_data;
3051 unsigned long flags;
3053 if (debug_level >= DEBUG_LEVEL_INFO)
3054 printk("%s(%d):mgsl_set_termios %s\n", __FILE__,__LINE__,
3055 tty->driver->name );
3057 mgsl_change_params(info);
3059 /* Handle transition to B0 status */
3060 if (old_termios->c_cflag & CBAUD &&
3061 !(tty->termios->c_cflag & CBAUD)) {
3062 info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
3063 spin_lock_irqsave(&info->irq_spinlock,flags);
3064 usc_set_serial_signals(info);
3065 spin_unlock_irqrestore(&info->irq_spinlock,flags);
3068 /* Handle transition away from B0 status */
3069 if (!(old_termios->c_cflag & CBAUD) &&
3070 tty->termios->c_cflag & CBAUD) {
3071 info->serial_signals |= SerialSignal_DTR;
3072 if (!(tty->termios->c_cflag & CRTSCTS) ||
3073 !test_bit(TTY_THROTTLED, &tty->flags)) {
3074 info->serial_signals |= SerialSignal_RTS;
3076 spin_lock_irqsave(&info->irq_spinlock,flags);
3077 usc_set_serial_signals(info);
3078 spin_unlock_irqrestore(&info->irq_spinlock,flags);
3081 /* Handle turning off CRTSCTS */
3082 if (old_termios->c_cflag & CRTSCTS &&
3083 !(tty->termios->c_cflag & CRTSCTS)) {
3084 tty->hw_stopped = 0;
3088 } /* end of mgsl_set_termios() */
3092 * Called when port is closed. Wait for remaining data to be
3093 * sent. Disable port and free resources.
3097 * tty pointer to open tty structure
3098 * filp pointer to open file object
3100 * Return Value: None
3102 static void mgsl_close(struct tty_struct *tty, struct file * filp)
3104 struct mgsl_struct * info = (struct mgsl_struct *)tty->driver_data;
3106 if (mgsl_paranoia_check(info, tty->name, "mgsl_close"))
3109 if (debug_level >= DEBUG_LEVEL_INFO)
3110 printk("%s(%d):mgsl_close(%s) entry, count=%d\n",
3111 __FILE__,__LINE__, info->device_name, info->count);
3116 if (tty_hung_up_p(filp))
3119 if ((tty->count == 1) && (info->count != 1)) {
3121 * tty->count is 1 and the tty structure will be freed.
3122 * info->count should be one in this case.
3123 * if it's not, correct it so that the port is shutdown.
3125 printk("mgsl_close: bad refcount; tty->count is 1, "
3126 "info->count is %d\n", info->count);
3132 /* if at least one open remaining, leave hardware active */
3136 info->flags |= ASYNC_CLOSING;
3138 /* set tty->closing to notify line discipline to
3139 * only process XON/XOFF characters. Only the N_TTY
3140 * discipline appears to use this (ppp does not).
3144 /* wait for transmit data to clear all layers */
3146 if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE) {
3147 if (debug_level >= DEBUG_LEVEL_INFO)
3148 printk("%s(%d):mgsl_close(%s) calling tty_wait_until_sent\n",
3149 __FILE__,__LINE__, info->device_name );
3150 tty_wait_until_sent(tty, info->closing_wait);
3153 if (info->flags & ASYNC_INITIALIZED)
3154 mgsl_wait_until_sent(tty, info->timeout);
3156 if (tty->driver->flush_buffer)
3157 tty->driver->flush_buffer(tty);
3159 tty_ldisc_flush(tty);
3166 if (info->blocked_open) {
3167 if (info->close_delay) {
3168 msleep_interruptible(jiffies_to_msecs(info->close_delay));
3170 wake_up_interruptible(&info->open_wait);
3173 info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
3175 wake_up_interruptible(&info->close_wait);
3178 if (debug_level >= DEBUG_LEVEL_INFO)
3179 printk("%s(%d):mgsl_close(%s) exit, count=%d\n", __FILE__,__LINE__,
3180 tty->driver->name, info->count);
3182 } /* end of mgsl_close() */
3184 /* mgsl_wait_until_sent()
3186 * Wait until the transmitter is empty.
3190 * tty pointer to tty info structure
3191 * timeout time to wait for send completion
3193 * Return Value: None
3195 static void mgsl_wait_until_sent(struct tty_struct *tty, int timeout)
3197 struct mgsl_struct * info = (struct mgsl_struct *)tty->driver_data;
3198 unsigned long orig_jiffies, char_time;
3203 if (debug_level >= DEBUG_LEVEL_INFO)
3204 printk("%s(%d):mgsl_wait_until_sent(%s) entry\n",
3205 __FILE__,__LINE__, info->device_name );
3207 if (mgsl_paranoia_check(info, tty->name, "mgsl_wait_until_sent"))
3210 if (!(info->flags & ASYNC_INITIALIZED))
3213 orig_jiffies = jiffies;
3215 /* Set check interval to 1/5 of estimated time to
3216 * send a character, and make it at least 1. The check
3217 * interval should also be less than the timeout.
3218 * Note: use tight timings here to satisfy the NIST-PCTS.
3221 if ( info->params.data_rate ) {
3222 char_time = info->timeout/(32 * 5);
3229 char_time = min_t(unsigned long, char_time, timeout);
3231 if ( info->params.mode == MGSL_MODE_HDLC ||
3232 info->params.mode == MGSL_MODE_RAW ) {
3233 while (info->tx_active) {
3234 msleep_interruptible(jiffies_to_msecs(char_time));
3235 if (signal_pending(current))
3237 if (timeout && time_after(jiffies, orig_jiffies + timeout))
3241 while (!(usc_InReg(info,TCSR) & TXSTATUS_ALL_SENT) &&
3243 msleep_interruptible(jiffies_to_msecs(char_time));
3244 if (signal_pending(current))
3246 if (timeout && time_after(jiffies, orig_jiffies + timeout))
3252 if (debug_level >= DEBUG_LEVEL_INFO)
3253 printk("%s(%d):mgsl_wait_until_sent(%s) exit\n",
3254 __FILE__,__LINE__, info->device_name );
3256 } /* end of mgsl_wait_until_sent() */
3260 * Called by tty_hangup() when a hangup is signaled.
3261 * This is the same as to closing all open files for the port.
3263 * Arguments: tty pointer to associated tty object
3264 * Return Value: None
3266 static void mgsl_hangup(struct tty_struct *tty)
3268 struct mgsl_struct * info = (struct mgsl_struct *)tty->driver_data;
3270 if (debug_level >= DEBUG_LEVEL_INFO)
3271 printk("%s(%d):mgsl_hangup(%s)\n",
3272 __FILE__,__LINE__, info->device_name );
3274 if (mgsl_paranoia_check(info, tty->name, "mgsl_hangup"))
3277 mgsl_flush_buffer(tty);
3281 info->flags &= ~ASYNC_NORMAL_ACTIVE;
3284 wake_up_interruptible(&info->open_wait);
3286 } /* end of mgsl_hangup() */
3288 /* block_til_ready()
3290 * Block the current process until the specified port
3291 * is ready to be opened.
3295 * tty pointer to tty info structure
3296 * filp pointer to open file object
3297 * info pointer to device instance data
3299 * Return Value: 0 if success, otherwise error code
3301 static int block_til_ready(struct tty_struct *tty, struct file * filp,
3302 struct mgsl_struct *info)
3304 DECLARE_WAITQUEUE(wait, current);
3306 int do_clocal = 0, extra_count = 0;
3307 unsigned long flags;
3309 if (debug_level >= DEBUG_LEVEL_INFO)
3310 printk("%s(%d):block_til_ready on %s\n",
3311 __FILE__,__LINE__, tty->driver->name );
3313 if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
3314 /* nonblock mode is set or port is not enabled */
3315 info->flags |= ASYNC_NORMAL_ACTIVE;
3319 if (tty->termios->c_cflag & CLOCAL)
3322 /* Wait for carrier detect and the line to become
3323 * free (i.e., not in use by the callout). While we are in
3324 * this loop, info->count is dropped by one, so that
3325 * mgsl_close() knows when to free things. We restore it upon
3326 * exit, either normal or abnormal.
3330 add_wait_queue(&info->open_wait, &wait);
3332 if (debug_level >= DEBUG_LEVEL_INFO)
3333 printk("%s(%d):block_til_ready before block on %s count=%d\n",
3334 __FILE__,__LINE__, tty->driver->name, info->count );
3336 spin_lock_irqsave(&info->irq_spinlock, flags);
3337 if (!tty_hung_up_p(filp)) {
3341 spin_unlock_irqrestore(&info->irq_spinlock, flags);
3342 info->blocked_open++;
3345 if (tty->termios->c_cflag & CBAUD) {
3346 spin_lock_irqsave(&info->irq_spinlock,flags);
3347 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
3348 usc_set_serial_signals(info);
3349 spin_unlock_irqrestore(&info->irq_spinlock,flags);
3352 set_current_state(TASK_INTERRUPTIBLE);
3354 if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)){
3355 retval = (info->flags & ASYNC_HUP_NOTIFY) ?
3356 -EAGAIN : -ERESTARTSYS;
3360 spin_lock_irqsave(&info->irq_spinlock,flags);
3361 usc_get_serial_signals(info);
3362 spin_unlock_irqrestore(&info->irq_spinlock,flags);
3364 if (!(info->flags & ASYNC_CLOSING) &&
3365 (do_clocal || (info->serial_signals & SerialSignal_DCD)) ) {
3369 if (signal_pending(current)) {
3370 retval = -ERESTARTSYS;
3374 if (debug_level >= DEBUG_LEVEL_INFO)
3375 printk("%s(%d):block_til_ready blocking on %s count=%d\n",
3376 __FILE__,__LINE__, tty->driver->name, info->count );
3381 set_current_state(TASK_RUNNING);
3382 remove_wait_queue(&info->open_wait, &wait);
3386 info->blocked_open--;
3388 if (debug_level >= DEBUG_LEVEL_INFO)
3389 printk("%s(%d):block_til_ready after blocking on %s count=%d\n",
3390 __FILE__,__LINE__, tty->driver->name, info->count );
3393 info->flags |= ASYNC_NORMAL_ACTIVE;
3397 } /* end of block_til_ready() */
3401 * Called when a port is opened. Init and enable port.
3402 * Perform serial-specific initialization for the tty structure.
3404 * Arguments: tty pointer to tty info structure
3405 * filp associated file pointer
3407 * Return Value: 0 if success, otherwise error code
3409 static int mgsl_open(struct tty_struct *tty, struct file * filp)
3411 struct mgsl_struct *info;
3413 unsigned long flags;
3415 /* verify range of specified line number */
3417 if ((line < 0) || (line >= mgsl_device_count)) {
3418 printk("%s(%d):mgsl_open with invalid line #%d.\n",
3419 __FILE__,__LINE__,line);
3423 /* find the info structure for the specified line */
3424 info = mgsl_device_list;
3425 while(info && info->line != line)
3426 info = info->next_device;
3427 if (mgsl_paranoia_check(info, tty->name, "mgsl_open"))
3430 tty->driver_data = info;
3433 if (debug_level >= DEBUG_LEVEL_INFO)
3434 printk("%s(%d):mgsl_open(%s), old ref count = %d\n",
3435 __FILE__,__LINE__,tty->driver->name, info->count);
3437 /* If port is closing, signal caller to try again */
3438 if (tty_hung_up_p(filp) || info->flags & ASYNC_CLOSING){
3439 if (info->flags & ASYNC_CLOSING)
3440 interruptible_sleep_on(&info->close_wait);
3441 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
3442 -EAGAIN : -ERESTARTSYS);
3446 info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
3448 spin_lock_irqsave(&info->netlock, flags);
3449 if (info->netcount) {
3451 spin_unlock_irqrestore(&info->netlock, flags);
3455 spin_unlock_irqrestore(&info->netlock, flags);
3457 if (info->count == 1) {
3458 /* 1st open on this device, init hardware */
3459 retval = startup(info);
3464 retval = block_til_ready(tty, filp, info);
3466 if (debug_level >= DEBUG_LEVEL_INFO)
3467 printk("%s(%d):block_til_ready(%s) returned %d\n",
3468 __FILE__,__LINE__, info->device_name, retval);
3472 if (debug_level >= DEBUG_LEVEL_INFO)
3473 printk("%s(%d):mgsl_open(%s) success\n",
3474 __FILE__,__LINE__, info->device_name);
3479 if (tty->count == 1)
3480 info->tty = NULL; /* tty layer will release tty struct */
3487 } /* end of mgsl_open() */
3490 * /proc fs routines....
3493 static inline int line_info(char *buf, struct mgsl_struct *info)
3497 unsigned long flags;
3499 if (info->bus_type == MGSL_BUS_TYPE_PCI) {
3500 ret = sprintf(buf, "%s:PCI io:%04X irq:%d mem:%08X lcr:%08X",
3501 info->device_name, info->io_base, info->irq_level,
3502 info->phys_memory_base, info->phys_lcr_base);
3504 ret = sprintf(buf, "%s:(E)ISA io:%04X irq:%d dma:%d",
3505 info->device_name, info->io_base,
3506 info->irq_level, info->dma_level);
3509 /* output current serial signal states */
3510 spin_lock_irqsave(&info->irq_spinlock,flags);
3511 usc_get_serial_signals(info);
3512 spin_unlock_irqrestore(&info->irq_spinlock,flags);
3516 if (info->serial_signals & SerialSignal_RTS)
3517 strcat(stat_buf, "|RTS");
3518 if (info->serial_signals & SerialSignal_CTS)
3519 strcat(stat_buf, "|CTS");
3520 if (info->serial_signals & SerialSignal_DTR)
3521 strcat(stat_buf, "|DTR");
3522 if (info->serial_signals & SerialSignal_DSR)
3523 strcat(stat_buf, "|DSR");
3524 if (info->serial_signals & SerialSignal_DCD)
3525 strcat(stat_buf, "|CD");
3526 if (info->serial_signals & SerialSignal_RI)
3527 strcat(stat_buf, "|RI");
3529 if (info->params.mode == MGSL_MODE_HDLC ||
3530 info->params.mode == MGSL_MODE_RAW ) {
3531 ret += sprintf(buf+ret, " HDLC txok:%d rxok:%d",
3532 info->icount.txok, info->icount.rxok);
3533 if (info->icount.txunder)
3534 ret += sprintf(buf+ret, " txunder:%d", info->icount.txunder);
3535 if (info->icount.txabort)
3536 ret += sprintf(buf+ret, " txabort:%d", info->icount.txabort);
3537 if (info->icount.rxshort)
3538 ret += sprintf(buf+ret, " rxshort:%d", info->icount.rxshort);
3539 if (info->icount.rxlong)
3540 ret += sprintf(buf+ret, " rxlong:%d", info->icount.rxlong);
3541 if (info->icount.rxover)
3542 ret += sprintf(buf+ret, " rxover:%d", info->icount.rxover);
3543 if (info->icount.rxcrc)
3544 ret += sprintf(buf+ret, " rxcrc:%d", info->icount.rxcrc);
3546 ret += sprintf(buf+ret, " ASYNC tx:%d rx:%d",
3547 info->icount.tx, info->icount.rx);
3548 if (info->icount.frame)
3549 ret += sprintf(buf+ret, " fe:%d", info->icount.frame);
3550 if (info->icount.parity)
3551 ret += sprintf(buf+ret, " pe:%d", info->icount.parity);
3552 if (info->icount.brk)
3553 ret += sprintf(buf+ret, " brk:%d", info->icount.brk);
3554 if (info->icount.overrun)
3555 ret += sprintf(buf+ret, " oe:%d", info->icount.overrun);
3558 /* Append serial signal status to end */
3559 ret += sprintf(buf+ret, " %s\n", stat_buf+1);
3561 ret += sprintf(buf+ret, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
3562 info->tx_active,info->bh_requested,info->bh_running,
3565 spin_lock_irqsave(&info->irq_spinlock,flags);
3567 u16 Tcsr = usc_InReg( info, TCSR );
3568 u16 Tdmr = usc_InDmaReg( info, TDMR );
3569 u16 Ticr = usc_InReg( info, TICR );
3570 u16 Rscr = usc_InReg( info, RCSR );
3571 u16 Rdmr = usc_InDmaReg( info, RDMR );
3572 u16 Ricr = usc_InReg( info, RICR );
3573 u16 Icr = usc_InReg( info, ICR );
3574 u16 Dccr = usc_InReg( info, DCCR );
3575 u16 Tmr = usc_InReg( info, TMR );
3576 u16 Tccr = usc_InReg( info, TCCR );
3577 u16 Ccar = inw( info->io_base + CCAR );
3578 ret += sprintf(buf+ret, "tcsr=%04X tdmr=%04X ticr=%04X rcsr=%04X rdmr=%04X\n"
3579 "ricr=%04X icr =%04X dccr=%04X tmr=%04X tccr=%04X ccar=%04X\n",
3580 Tcsr,Tdmr,Ticr,Rscr,Rdmr,Ricr,Icr,Dccr,Tmr,Tccr,Ccar );
3582 spin_unlock_irqrestore(&info->irq_spinlock,flags);
3586 } /* end of line_info() */
3590 * Called to print information about devices
3593 * page page of memory to hold returned info
3602 static int mgsl_read_proc(char *page, char **start, off_t off, int count,
3603 int *eof, void *data)
3607 struct mgsl_struct *info;
3609 len += sprintf(page, "synclink driver:%s\n", driver_version);
3611 info = mgsl_device_list;
3613 l = line_info(page + len, info);
3615 if (len+begin > off+count)
3617 if (len+begin < off) {
3621 info = info->next_device;
3626 if (off >= len+begin)
3628 *start = page + (off-begin);
3629 return ((count < begin+len-off) ? count : begin+len-off);
3631 } /* end of mgsl_read_proc() */
3633 /* mgsl_allocate_dma_buffers()
3635 * Allocate and format DMA buffers (ISA adapter)
3636 * or format shared memory buffers (PCI adapter).
3638 * Arguments: info pointer to device instance data
3639 * Return Value: 0 if success, otherwise error
3641 static int mgsl_allocate_dma_buffers(struct mgsl_struct *info)
3643 unsigned short BuffersPerFrame;
3645 info->last_mem_alloc = 0;
3647 /* Calculate the number of DMA buffers necessary to hold the */
3648 /* largest allowable frame size. Note: If the max frame size is */
3649 /* not an even multiple of the DMA buffer size then we need to */
3650 /* round the buffer count per frame up one. */
3652 BuffersPerFrame = (unsigned short)(info->max_frame_size/DMABUFFERSIZE);
3653 if ( info->max_frame_size % DMABUFFERSIZE )
3656 if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
3658 * The PCI adapter has 256KBytes of shared memory to use.
3659 * This is 64 PAGE_SIZE buffers.
3661 * The first page is used for padding at this time so the
3662 * buffer list does not begin at offset 0 of the PCI
3663 * adapter's shared memory.
3665 * The 2nd page is used for the buffer list. A 4K buffer
3666 * list can hold 128 DMA_BUFFER structures at 32 bytes
3669 * This leaves 62 4K pages.
3671 * The next N pages are used for transmit frame(s). We
3672 * reserve enough 4K page blocks to hold the required
3673 * number of transmit dma buffers (num_tx_dma_buffers),
3674 * each of MaxFrameSize size.
3676 * Of the remaining pages (62-N), determine how many can
3677 * be used to receive full MaxFrameSize inbound frames
3679 info->tx_buffer_count = info->num_tx_dma_buffers * BuffersPerFrame;
3680 info->rx_buffer_count = 62 - info->tx_buffer_count;
3682 /* Calculate the number of PAGE_SIZE buffers needed for */
3683 /* receive and transmit DMA buffers. */
3686 /* Calculate the number of DMA buffers necessary to */
3687 /* hold 7 max size receive frames and one max size transmit frame. */
3688 /* The receive buffer count is bumped by one so we avoid an */
3689 /* End of List condition if all receive buffers are used when */
3690 /* using linked list DMA buffers. */
3692 info->tx_buffer_count = info->num_tx_dma_buffers * BuffersPerFrame;
3693 info->rx_buffer_count = (BuffersPerFrame * MAXRXFRAMES) + 6;
3696 * limit total TxBuffers & RxBuffers to 62 4K total
3697 * (ala PCI Allocation)
3700 if ( (info->tx_buffer_count + info->rx_buffer_count) > 62 )
3701 info->rx_buffer_count = 62 - info->tx_buffer_count;
3705 if ( debug_level >= DEBUG_LEVEL_INFO )
3706 printk("%s(%d):Allocating %d TX and %d RX DMA buffers.\n",
3707 __FILE__,__LINE__, info->tx_buffer_count,info->rx_buffer_count);
3709 if ( mgsl_alloc_buffer_list_memory( info ) < 0 ||
3710 mgsl_alloc_frame_memory(info, info->rx_buffer_list, info->rx_buffer_count) < 0 ||
3711 mgsl_alloc_frame_memory(info, info->tx_buffer_list, info->tx_buffer_count) < 0 ||
3712 mgsl_alloc_intermediate_rxbuffer_memory(info) < 0 ||
3713 mgsl_alloc_intermediate_txbuffer_memory(info) < 0 ) {
3714 printk("%s(%d):Can't allocate DMA buffer memory\n",__FILE__,__LINE__);
3718 mgsl_reset_rx_dma_buffers( info );
3719 mgsl_reset_tx_dma_buffers( info );
3723 } /* end of mgsl_allocate_dma_buffers() */
3726 * mgsl_alloc_buffer_list_memory()
3728 * Allocate a common DMA buffer for use as the
3729 * receive and transmit buffer lists.
3731 * A buffer list is a set of buffer entries where each entry contains
3732 * a pointer to an actual buffer and a pointer to the next buffer entry
3733 * (plus some other info about the buffer).
3735 * The buffer entries for a list are built to form a circular list so
3736 * that when the entire list has been traversed you start back at the
3739 * This function allocates memory for just the buffer entries.
3740 * The links (pointer to next entry) are filled in with the physical
3741 * address of the next entry so the adapter can navigate the list
3742 * using bus master DMA. The pointers to the actual buffers are filled
3743 * out later when the actual buffers are allocated.
3745 * Arguments: info pointer to device instance data
3746 * Return Value: 0 if success, otherwise error
3748 static int mgsl_alloc_buffer_list_memory( struct mgsl_struct *info )
3752 if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
3753 /* PCI adapter uses shared memory. */
3754 info->buffer_list = info->memory_base + info->last_mem_alloc;
3755 info->buffer_list_phys = info->last_mem_alloc;
3756 info->last_mem_alloc += BUFFERLISTSIZE;
3758 /* ISA adapter uses system memory. */
3759 /* The buffer lists are allocated as a common buffer that both */
3760 /* the processor and adapter can access. This allows the driver to */
3761 /* inspect portions of the buffer while other portions are being */
3762 /* updated by the adapter using Bus Master DMA. */
3764 info->buffer_list = dma_alloc_coherent(NULL, BUFFERLISTSIZE, &info->buffer_list_dma_addr, GFP_KERNEL);
3765 if (info->buffer_list == NULL)
3767 info->buffer_list_phys = (u32)(info->buffer_list_dma_addr);
3770 /* We got the memory for the buffer entry lists. */
3771 /* Initialize the memory block to all zeros. */
3772 memset( info->buffer_list, 0, BUFFERLISTSIZE );
3774 /* Save virtual address pointers to the receive and */
3775 /* transmit buffer lists. (Receive 1st). These pointers will */
3776 /* be used by the processor to access the lists. */
3777 info->rx_buffer_list = (DMABUFFERENTRY *)info->buffer_list;
3778 info->tx_buffer_list = (DMABUFFERENTRY *)info->buffer_list;
3779 info->tx_buffer_list += info->rx_buffer_count;
3782 * Build the links for the buffer entry lists such that
3783 * two circular lists are built. (Transmit and Receive).
3785 * Note: the links are physical addresses
3786 * which are read by the adapter to determine the next
3787 * buffer entry to use.
3790 for ( i = 0; i < info->rx_buffer_count; i++ ) {
3791 /* calculate and store physical address of this buffer entry */
3792 info->rx_buffer_list[i].phys_entry =
3793 info->buffer_list_phys + (i * sizeof(DMABUFFERENTRY));
3795 /* calculate and store physical address of */
3796 /* next entry in cirular list of entries */
3798 info->rx_buffer_list[i].link = info->buffer_list_phys;
3800 if ( i < info->rx_buffer_count - 1 )
3801 info->rx_buffer_list[i].link += (i + 1) * sizeof(DMABUFFERENTRY);
3804 for ( i = 0; i < info->tx_buffer_count; i++ ) {
3805 /* calculate and store physical address of this buffer entry */
3806 info->tx_buffer_list[i].phys_entry = info->buffer_list_phys +
3807 ((info->rx_buffer_count + i) * sizeof(DMABUFFERENTRY));
3809 /* calculate and store physical address of */
3810 /* next entry in cirular list of entries */
3812 info->tx_buffer_list[i].link = info->buffer_list_phys +
3813 info->rx_buffer_count * sizeof(DMABUFFERENTRY);
3815 if ( i < info->tx_buffer_count - 1 )
3816 info->tx_buffer_list[i].link += (i + 1) * sizeof(DMABUFFERENTRY);
3821 } /* end of mgsl_alloc_buffer_list_memory() */
3823 /* Free DMA buffers allocated for use as the
3824 * receive and transmit buffer lists.
3827 * The data transfer buffers associated with the buffer list
3828 * MUST be freed before freeing the buffer list itself because
3829 * the buffer list contains the information necessary to free
3830 * the individual buffers!
3832 static void mgsl_free_buffer_list_memory( struct mgsl_struct *info )
3834 if (info->buffer_list && info->bus_type != MGSL_BUS_TYPE_PCI)
3835 dma_free_coherent(NULL, BUFFERLISTSIZE, info->buffer_list, info->buffer_list_dma_addr);
3837 info->buffer_list = NULL;
3838 info->rx_buffer_list = NULL;
3839 info->tx_buffer_list = NULL;
3841 } /* end of mgsl_free_buffer_list_memory() */
3844 * mgsl_alloc_frame_memory()
3846 * Allocate the frame DMA buffers used by the specified buffer list.
3847 * Each DMA buffer will be one memory page in size. This is necessary
3848 * because memory can fragment enough that it may be impossible
3853 * info pointer to device instance data
3854 * BufferList pointer to list of buffer entries
3855 * Buffercount count of buffer entries in buffer list
3857 * Return Value: 0 if success, otherwise -ENOMEM
3859 static int mgsl_alloc_frame_memory(struct mgsl_struct *info,DMABUFFERENTRY *BufferList,int Buffercount)
3864 /* Allocate page sized buffers for the receive buffer list */
3866 for ( i = 0; i < Buffercount; i++ ) {
3867 if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
3868 /* PCI adapter uses shared memory buffers. */
3869 BufferList[i].virt_addr = info->memory_base + info->last_mem_alloc;
3870 phys_addr = info->last_mem_alloc;
3871 info->last_mem_alloc += DMABUFFERSIZE;
3873 /* ISA adapter uses system memory. */
3874 BufferList[i].virt_addr = dma_alloc_coherent(NULL, DMABUFFERSIZE, &BufferList[i].dma_addr, GFP_KERNEL);
3875 if (BufferList[i].virt_addr == NULL)
3877 phys_addr = (u32)(BufferList[i].dma_addr);
3879 BufferList[i].phys_addr = phys_addr;
3884 } /* end of mgsl_alloc_frame_memory() */
3887 * mgsl_free_frame_memory()
3889 * Free the buffers associated with
3890 * each buffer entry of a buffer list.
3894 * info pointer to device instance data
3895 * BufferList pointer to list of buffer entries
3896 * Buffercount count of buffer entries in buffer list
3898 * Return Value: None
3900 static void mgsl_free_frame_memory(struct mgsl_struct *info, DMABUFFERENTRY *BufferList, int Buffercount)
3905 for ( i = 0 ; i < Buffercount ; i++ ) {
3906 if ( BufferList[i].virt_addr ) {
3907 if ( info->bus_type != MGSL_BUS_TYPE_PCI )
3908 dma_free_coherent(NULL, DMABUFFERSIZE, BufferList[i].virt_addr, BufferList[i].dma_addr);
3909 BufferList[i].virt_addr = NULL;
3914 } /* end of mgsl_free_frame_memory() */
3916 /* mgsl_free_dma_buffers()
3920 * Arguments: info pointer to device instance data
3921 * Return Value: None
3923 static void mgsl_free_dma_buffers( struct mgsl_struct *info )
3925 mgsl_free_frame_memory( info, info->rx_buffer_list, info->rx_buffer_count );
3926 mgsl_free_frame_memory( info, info->tx_buffer_list, info->tx_buffer_count );
3927 mgsl_free_buffer_list_memory( info );
3929 } /* end of mgsl_free_dma_buffers() */
3933 * mgsl_alloc_intermediate_rxbuffer_memory()
3935 * Allocate a buffer large enough to hold max_frame_size. This buffer
3936 * is used to pass an assembled frame to the line discipline.
3940 * info pointer to device instance data
3942 * Return Value: 0 if success, otherwise -ENOMEM
3944 static int mgsl_alloc_intermediate_rxbuffer_memory(struct mgsl_struct *info)
3946 info->intermediate_rxbuffer = kmalloc(info->max_frame_size, GFP_KERNEL | GFP_DMA);
3947 if ( info->intermediate_rxbuffer == NULL )
3952 } /* end of mgsl_alloc_intermediate_rxbuffer_memory() */
3955 * mgsl_free_intermediate_rxbuffer_memory()
3960 * info pointer to device instance data
3962 * Return Value: None
3964 static void mgsl_free_intermediate_rxbuffer_memory(struct mgsl_struct *info)
3966 kfree(info->intermediate_rxbuffer);
3967 info->intermediate_rxbuffer = NULL;
3969 } /* end of mgsl_free_intermediate_rxbuffer_memory() */
3972 * mgsl_alloc_intermediate_txbuffer_memory()
3974 * Allocate intermdiate transmit buffer(s) large enough to hold max_frame_size.
3975 * This buffer is used to load transmit frames into the adapter's dma transfer
3976 * buffers when there is sufficient space.
3980 * info pointer to device instance data
3982 * Return Value: 0 if success, otherwise -ENOMEM
3984 static int mgsl_alloc_intermediate_txbuffer_memory(struct mgsl_struct *info)
3988 if ( debug_level >= DEBUG_LEVEL_INFO )
3989 printk("%s %s(%d) allocating %d tx holding buffers\n",
3990 info->device_name, __FILE__,__LINE__,info->num_tx_holding_buffers);
3992 memset(info->tx_holding_buffers,0,sizeof(info->tx_holding_buffers));
3994 for ( i=0; i<info->num_tx_holding_buffers; ++i) {
3995 info->tx_holding_buffers[i].buffer =
3996 kmalloc(info->max_frame_size, GFP_KERNEL);
3997 if (info->tx_holding_buffers[i].buffer == NULL) {
3998 for (--i; i >= 0; i--) {
3999 kfree(info->tx_holding_buffers[i].buffer);
4000 info->tx_holding_buffers[i].buffer = NULL;
4008 } /* end of mgsl_alloc_intermediate_txbuffer_memory() */
4011 * mgsl_free_intermediate_txbuffer_memory()
4016 * info pointer to device instance data
4018 * Return Value: None
4020 static void mgsl_free_intermediate_txbuffer_memory(struct mgsl_struct *info)
4024 for ( i=0; i<info->num_tx_holding_buffers; ++i ) {
4025 kfree(info->tx_holding_buffers[i].buffer);
4026 info->tx_holding_buffers[i].buffer = NULL;
4029 info->get_tx_holding_index = 0;
4030 info->put_tx_holding_index = 0;
4031 info->tx_holding_count = 0;
4033 } /* end of mgsl_free_intermediate_txbuffer_memory() */
4037 * load_next_tx_holding_buffer()
4039 * attempts to load the next buffered tx request into the
4044 * info pointer to device instance data
4046 * Return Value: 1 if next buffered tx request loaded
4047 * into adapter's tx dma buffer,
4050 static int load_next_tx_holding_buffer(struct mgsl_struct *info)
4054 if ( info->tx_holding_count ) {
4055 /* determine if we have enough tx dma buffers
4056 * to accommodate the next tx frame
4058 struct tx_holding_buffer *ptx =
4059 &info->tx_holding_buffers[info->get_tx_holding_index];
4060 int num_free = num_free_tx_dma_buffers(info);
4061 int num_needed = ptx->buffer_size / DMABUFFERSIZE;
4062 if ( ptx->buffer_size % DMABUFFERSIZE )
4065 if (num_needed <= num_free) {
4066 info->xmit_cnt = ptx->buffer_size;
4067 mgsl_load_tx_dma_buffer(info,ptx->buffer,ptx->buffer_size);
4069 --info->tx_holding_count;
4070 if ( ++info->get_tx_holding_index >= info->num_tx_holding_buffers)
4071 info->get_tx_holding_index=0;
4073 /* restart transmit timer */
4074 mod_timer(&info->tx_timer, jiffies + msecs_to_jiffies(5000));
4084 * save_tx_buffer_request()
4086 * attempt to store transmit frame request for later transmission
4090 * info pointer to device instance data
4091 * Buffer pointer to buffer containing frame to load
4092 * BufferSize size in bytes of frame in Buffer
4094 * Return Value: 1 if able to store, 0 otherwise
4096 static int save_tx_buffer_request(struct mgsl_struct *info,const char *Buffer, unsigned int BufferSize)
4098 struct tx_holding_buffer *ptx;
4100 if ( info->tx_holding_count >= info->num_tx_holding_buffers ) {
4101 return 0; /* all buffers in use */
4104 ptx = &info->tx_holding_buffers[info->put_tx_holding_index];
4105 ptx->buffer_size = BufferSize;
4106 memcpy( ptx->buffer, Buffer, BufferSize);
4108 ++info->tx_holding_count;
4109 if ( ++info->put_tx_holding_index >= info->num_tx_holding_buffers)
4110 info->put_tx_holding_index=0;
4115 static int mgsl_claim_resources(struct mgsl_struct *info)
4117 if (request_region(info->io_base,info->io_addr_size,"synclink") == NULL) {
4118 printk( "%s(%d):I/O address conflict on device %s Addr=%08X\n",
4119 __FILE__,__LINE__,info->device_name, info->io_base);
4122 info->io_addr_requested = 1;
4124 if ( request_irq(info->irq_level,mgsl_interrupt,info->irq_flags,
4125 info->device_name, info ) < 0 ) {
4126 printk( "%s(%d):Cant request interrupt on device %s IRQ=%d\n",
4127 __FILE__,__LINE__,info->device_name, info->irq_level );
4130 info->irq_requested = 1;
4132 if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
4133 if (request_mem_region(info->phys_memory_base,0x40000,"synclink") == NULL) {
4134 printk( "%s(%d):mem addr conflict device %s Addr=%08X\n",
4135 __FILE__,__LINE__,info->device_name, info->phys_memory_base);
4138 info->shared_mem_requested = 1;
4139 if (request_mem_region(info->phys_lcr_base + info->lcr_offset,128,"synclink") == NULL) {
4140 printk( "%s(%d):lcr mem addr conflict device %s Addr=%08X\n",
4141 __FILE__,__LINE__,info->device_name, info->phys_lcr_base + info->lcr_offset);
4144 info->lcr_mem_requested = 1;
4146 info->memory_base = ioremap(info->phys_memory_base,0x40000);
4147 if (!info->memory_base) {
4148 printk( "%s(%d):Cant map shared memory on device %s MemAddr=%08X\n",
4149 __FILE__,__LINE__,info->device_name, info->phys_memory_base );
4153 if ( !mgsl_memory_test(info) ) {
4154 printk( "%s(%d):Failed shared memory test %s MemAddr=%08X\n",
4155 __FILE__,__LINE__,info->device_name, info->phys_memory_base );
4159 info->lcr_base = ioremap(info->phys_lcr_base,PAGE_SIZE) + info->lcr_offset;
4160 if (!info->lcr_base) {
4161 printk( "%s(%d):Cant map LCR memory on device %s MemAddr=%08X\n",
4162 __FILE__,__LINE__,info->device_name, info->phys_lcr_base );
4167 /* claim DMA channel */
4169 if (request_dma(info->dma_level,info->device_name) < 0){
4170 printk( "%s(%d):Cant request DMA channel on device %s DMA=%d\n",
4171 __FILE__,__LINE__,info->device_name, info->dma_level );
4172 mgsl_release_resources( info );
4175 info->dma_requested = 1;
4177 /* ISA adapter uses bus master DMA */
4178 set_dma_mode(info->dma_level,DMA_MODE_CASCADE);
4179 enable_dma(info->dma_level);
4182 if ( mgsl_allocate_dma_buffers(info) < 0 ) {
4183 printk( "%s(%d):Cant allocate DMA buffers on device %s DMA=%d\n",
4184 __FILE__,__LINE__,info->device_name, info->dma_level );
4190 mgsl_release_resources(info);
4193 } /* end of mgsl_claim_resources() */
4195 static void mgsl_release_resources(struct mgsl_struct *info)
4197 if ( debug_level >= DEBUG_LEVEL_INFO )
4198 printk( "%s(%d):mgsl_release_resources(%s) entry\n",
4199 __FILE__,__LINE__,info->device_name );
4201 if ( info->irq_requested ) {
4202 free_irq(info->irq_level, info);
4203 info->irq_requested = 0;
4205 if ( info->dma_requested ) {
4206 disable_dma(info->dma_level);
4207 free_dma(info->dma_level);
4208 info->dma_requested = 0;
4210 mgsl_free_dma_buffers(info);
4211 mgsl_free_intermediate_rxbuffer_memory(info);
4212 mgsl_free_intermediate_txbuffer_memory(info);
4214 if ( info->io_addr_requested ) {
4215 release_region(info->io_base,info->io_addr_size);
4216 info->io_addr_requested = 0;
4218 if ( info->shared_mem_requested ) {
4219 release_mem_region(info->phys_memory_base,0x40000);
4220 info->shared_mem_requested = 0;
4222 if ( info->lcr_mem_requested ) {
4223 release_mem_region(info->phys_lcr_base + info->lcr_offset,128);
4224 info->lcr_mem_requested = 0;
4226 if (info->memory_base){
4227 iounmap(info->memory_base);
4228 info->memory_base = NULL;
4230 if (info->lcr_base){
4231 iounmap(info->lcr_base - info->lcr_offset);
4232 info->lcr_base = NULL;
4235 if ( debug_level >= DEBUG_LEVEL_INFO )
4236 printk( "%s(%d):mgsl_release_resources(%s) exit\n",
4237 __FILE__,__LINE__,info->device_name );
4239 } /* end of mgsl_release_resources() */
4241 /* mgsl_add_device()
4243 * Add the specified device instance data structure to the
4244 * global linked list of devices and increment the device count.
4246 * Arguments: info pointer to device instance data
4247 * Return Value: None
4249 static void mgsl_add_device( struct mgsl_struct *info )
4251 info->next_device = NULL;
4252 info->line = mgsl_device_count;
4253 sprintf(info->device_name,"ttySL%d",info->line);
4255 if (info->line < MAX_TOTAL_DEVICES) {
4256 if (maxframe[info->line])
4257 info->max_frame_size = maxframe[info->line];
4258 info->dosyncppp = dosyncppp[info->line];
4260 if (txdmabufs[info->line]) {
4261 info->num_tx_dma_buffers = txdmabufs[info->line];
4262 if (info->num_tx_dma_buffers < 1)
4263 info->num_tx_dma_buffers = 1;
4266 if (txholdbufs[info->line]) {
4267 info->num_tx_holding_buffers = txholdbufs[info->line];
4268 if (info->num_tx_holding_buffers < 1)
4269 info->num_tx_holding_buffers = 1;
4270 else if (info->num_tx_holding_buffers > MAX_TX_HOLDING_BUFFERS)
4271 info->num_tx_holding_buffers = MAX_TX_HOLDING_BUFFERS;
4275 mgsl_device_count++;
4277 if ( !mgsl_device_list )
4278 mgsl_device_list = info;
4280 struct mgsl_struct *current_dev = mgsl_device_list;
4281 while( current_dev->next_device )
4282 current_dev = current_dev->next_device;
4283 current_dev->next_device = info;
4286 if ( info->max_frame_size < 4096 )
4287 info->max_frame_size = 4096;
4288 else if ( info->max_frame_size > 65535 )
4289 info->max_frame_size = 65535;
4291 if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
4292 printk( "SyncLink PCI v%d %s: IO=%04X IRQ=%d Mem=%08X,%08X MaxFrameSize=%u\n",
4293 info->hw_version + 1, info->device_name, info->io_base, info->irq_level,
4294 info->phys_memory_base, info->phys_lcr_base,
4295 info->max_frame_size );
4297 printk( "SyncLink ISA %s: IO=%04X IRQ=%d DMA=%d MaxFrameSize=%u\n",
4298 info->device_name, info->io_base, info->irq_level, info->dma_level,
4299 info->max_frame_size );
4302 #if SYNCLINK_GENERIC_HDLC
4306 } /* end of mgsl_add_device() */
4308 /* mgsl_allocate_device()
4310 * Allocate and initialize a device instance structure
4313 * Return Value: pointer to mgsl_struct if success, otherwise NULL
4315 static struct mgsl_struct* mgsl_allocate_device(void)
4317 struct mgsl_struct *info;
4319 info = kzalloc(sizeof(struct mgsl_struct),
4323 printk("Error can't allocate device instance data\n");
4325 info->magic = MGSL_MAGIC;
4326 INIT_WORK(&info->task, mgsl_bh_handler);
4327 info->max_frame_size = 4096;
4328 info->close_delay = 5*HZ/10;
4329 info->closing_wait = 30*HZ;
4330 init_waitqueue_head(&info->open_wait);
4331 init_waitqueue_head(&info->close_wait);
4332 init_waitqueue_head(&info->status_event_wait_q);
4333 init_waitqueue_head(&info->event_wait_q);
4334 spin_lock_init(&info->irq_spinlock);
4335 spin_lock_init(&info->netlock);
4336 memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS));
4337 info->idle_mode = HDLC_TXIDLE_FLAGS;
4338 info->num_tx_dma_buffers = 1;
4339 info->num_tx_holding_buffers = 0;
4344 } /* end of mgsl_allocate_device()*/
4346 static const struct tty_operations mgsl_ops = {
4348 .close = mgsl_close,
4349 .write = mgsl_write,
4350 .put_char = mgsl_put_char,
4351 .flush_chars = mgsl_flush_chars,
4352 .write_room = mgsl_write_room,
4353 .chars_in_buffer = mgsl_chars_in_buffer,
4354 .flush_buffer = mgsl_flush_buffer,
4355 .ioctl = mgsl_ioctl,
4356 .throttle = mgsl_throttle,
4357 .unthrottle = mgsl_unthrottle,
4358 .send_xchar = mgsl_send_xchar,
4359 .break_ctl = mgsl_break,
4360 .wait_until_sent = mgsl_wait_until_sent,
4361 .read_proc = mgsl_read_proc,
4362 .set_termios = mgsl_set_termios,
4364 .start = mgsl_start,
4365 .hangup = mgsl_hangup,
4366 .tiocmget = tiocmget,
4367 .tiocmset = tiocmset,
4371 * perform tty device initialization
4373 static int mgsl_init_tty(void)
4377 serial_driver = alloc_tty_driver(128);
4381 serial_driver->owner = THIS_MODULE;
4382 serial_driver->driver_name = "synclink";
4383 serial_driver->name = "ttySL";
4384 serial_driver->major = ttymajor;
4385 serial_driver->minor_start = 64;
4386 serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
4387 serial_driver->subtype = SERIAL_TYPE_NORMAL;
4388 serial_driver->init_termios = tty_std_termios;
4389 serial_driver->init_termios.c_cflag =
4390 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
4391 serial_driver->init_termios.c_ispeed = 9600;
4392 serial_driver->init_termios.c_ospeed = 9600;
4393 serial_driver->flags = TTY_DRIVER_REAL_RAW;
4394 tty_set_operations(serial_driver, &mgsl_ops);
4395 if ((rc = tty_register_driver(serial_driver)) < 0) {
4396 printk("%s(%d):Couldn't register serial driver\n",
4398 put_tty_driver(serial_driver);
4399 serial_driver = NULL;
4403 printk("%s %s, tty major#%d\n",
4404 driver_name, driver_version,
4405 serial_driver->major);
4409 /* enumerate user specified ISA adapters
4411 static void mgsl_enum_isa_devices(void)
4413 struct mgsl_struct *info;
4416 /* Check for user specified ISA devices */
4418 for (i=0 ;(i < MAX_ISA_DEVICES) && io[i] && irq[i]; i++){
4419 if ( debug_level >= DEBUG_LEVEL_INFO )
4420 printk("ISA device specified io=%04X,irq=%d,dma=%d\n",
4421 io[i], irq[i], dma[i] );
4423 info = mgsl_allocate_device();
4425 /* error allocating device instance data */
4426 if ( debug_level >= DEBUG_LEVEL_ERROR )
4427 printk( "can't allocate device instance data.\n");
4431 /* Copy user configuration info to device instance data */
4432 info->io_base = (unsigned int)io[i];
4433 info->irq_level = (unsigned int)irq[i];
4434 info->irq_level = irq_canonicalize(info->irq_level);
4435 info->dma_level = (unsigned int)dma[i];
4436 info->bus_type = MGSL_BUS_TYPE_ISA;
4437 info->io_addr_size = 16;
4438 info->irq_flags = 0;
4440 mgsl_add_device( info );
4444 static void synclink_cleanup(void)
4447 struct mgsl_struct *info;
4448 struct mgsl_struct *tmp;
4450 printk("Unloading %s: %s\n", driver_name, driver_version);
4452 if (serial_driver) {
4453 if ((rc = tty_unregister_driver(serial_driver)))
4454 printk("%s(%d) failed to unregister tty driver err=%d\n",
4455 __FILE__,__LINE__,rc);
4456 put_tty_driver(serial_driver);
4459 info = mgsl_device_list;
4461 #if SYNCLINK_GENERIC_HDLC
4464 mgsl_release_resources(info);
4466 info = info->next_device;
4471 pci_unregister_driver(&synclink_pci_driver);
4474 static int __init synclink_init(void)
4478 if (break_on_load) {
4479 mgsl_get_text_ptr();
4483 printk("%s %s\n", driver_name, driver_version);
4485 mgsl_enum_isa_devices();
4486 if ((rc = pci_register_driver(&synclink_pci_driver)) < 0)
4487 printk("%s:failed to register PCI driver, error=%d\n",__FILE__,rc);
4491 if ((rc = mgsl_init_tty()) < 0)
4501 static void __exit synclink_exit(void)
4506 module_init(synclink_init);
4507 module_exit(synclink_exit);
4512 * Issue a USC Receive/Transmit command to the
4513 * Channel Command/Address Register (CCAR).
4517 * The command is encoded in the most significant 5 bits <15..11>
4518 * of the CCAR value. Bits <10..7> of the CCAR must be preserved
4519 * and Bits <6..0> must be written as zeros.
4523 * info pointer to device information structure
4524 * Cmd command mask (use symbolic macros)
4530 static void usc_RTCmd( struct mgsl_struct *info, u16 Cmd )
4532 /* output command to CCAR in bits <15..11> */
4533 /* preserve bits <10..7>, bits <6..0> must be zero */
4535 outw( Cmd + info->loopback_bits, info->io_base + CCAR );
4537 /* Read to flush write to CCAR */
4538 if ( info->bus_type == MGSL_BUS_TYPE_PCI )
4539 inw( info->io_base + CCAR );
4541 } /* end of usc_RTCmd() */
4546 * Issue a DMA command to the DMA Command/Address Register (DCAR).
4550 * info pointer to device information structure
4551 * Cmd DMA command mask (usc_DmaCmd_XX Macros)
4557 static void usc_DmaCmd( struct mgsl_struct *info, u16 Cmd )
4559 /* write command mask to DCAR */
4560 outw( Cmd + info->mbre_bit, info->io_base );
4562 /* Read to flush write to DCAR */
4563 if ( info->bus_type == MGSL_BUS_TYPE_PCI )
4564 inw( info->io_base );
4566 } /* end of usc_DmaCmd() */
4571 * Write a 16-bit value to a USC DMA register
4575 * info pointer to device info structure
4576 * RegAddr register address (number) for write
4577 * RegValue 16-bit value to write to register
4584 static void usc_OutDmaReg( struct mgsl_struct *info, u16 RegAddr, u16 RegValue )
4586 /* Note: The DCAR is located at the adapter base address */
4587 /* Note: must preserve state of BIT8 in DCAR */
4589 outw( RegAddr + info->mbre_bit, info->io_base );
4590 outw( RegValue, info->io_base );
4592 /* Read to flush write to DCAR */
4593 if ( info->bus_type == MGSL_BUS_TYPE_PCI )
4594 inw( info->io_base );
4596 } /* end of usc_OutDmaReg() */
4601 * Read a 16-bit value from a DMA register
4605 * info pointer to device info structure
4606 * RegAddr register address (number) to read from
4610 * The 16-bit value read from register
4613 static u16 usc_InDmaReg( struct mgsl_struct *info, u16 RegAddr )
4615 /* Note: The DCAR is located at the adapter base address */
4616 /* Note: must preserve state of BIT8 in DCAR */
4618 outw( RegAddr + info->mbre_bit, info->io_base );
4619 return inw( info->io_base );
4621 } /* end of usc_InDmaReg() */
4627 * Write a 16-bit value to a USC serial channel register
4631 * info pointer to device info structure
4632 * RegAddr register address (number) to write to
4633 * RegValue 16-bit value to write to register
4640 static void usc_OutReg( struct mgsl_struct *info, u16 RegAddr, u16 RegValue )
4642 outw( RegAddr + info->loopback_bits, info->io_base + CCAR );
4643 outw( RegValue, info->io_base + CCAR );
4645 /* Read to flush write to CCAR */
4646 if ( info->bus_type == MGSL_BUS_TYPE_PCI )
4647 inw( info->io_base + CCAR );
4649 } /* end of usc_OutReg() */
4654 * Reads a 16-bit value from a USC serial channel register
4658 * info pointer to device extension
4659 * RegAddr register address (number) to read from
4663 * 16-bit value read from register
4665 static u16 usc_InReg( struct mgsl_struct *info, u16 RegAddr )
4667 outw( RegAddr + info->loopback_bits, info->io_base + CCAR );
4668 return inw( info->io_base + CCAR );
4670 } /* end of usc_InReg() */
4672 /* usc_set_sdlc_mode()
4674 * Set up the adapter for SDLC DMA communications.
4676 * Arguments: info pointer to device instance data
4677 * Return Value: NONE
4679 static void usc_set_sdlc_mode( struct mgsl_struct *info )
4685 * determine if the IUSC on the adapter is pre-SL1660. If
4686 * not, take advantage of the UnderWait feature of more
4687 * modern chips. If an underrun occurs and this bit is set,
4688 * the transmitter will idle the programmed idle pattern
4689 * until the driver has time to service the underrun. Otherwise,
4690 * the dma controller may get the cycles previously requested
4691 * and begin transmitting queued tx data.
4693 usc_OutReg(info,TMCR,0x1f);
4694 RegValue=usc_InReg(info,TMDR);
4695 if ( RegValue == IUSC_PRE_SL1660 )
4701 if ( info->params.flags & HDLC_FLAG_HDLC_LOOPMODE )
4704 ** Channel Mode Register (CMR)
4706 ** <15..14> 10 Tx Sub Modes, Send Flag on Underrun
4707 ** <13> 0 0 = Transmit Disabled (initially)
4708 ** <12> 0 1 = Consecutive Idles share common 0
4709 ** <11..8> 1110 Transmitter Mode = HDLC/SDLC Loop
4710 ** <7..4> 0000 Rx Sub Modes, addr/ctrl field handling
4711 ** <3..0> 0110 Receiver Mode = HDLC/SDLC
4713 ** 1000 1110 0000 0110 = 0x8e06
4717 /*--------------------------------------------------
4718 * ignore user options for UnderRun Actions and
4720 *--------------------------------------------------*/
4724 /* Channel mode Register (CMR)
4726 * <15..14> 00 Tx Sub modes, Underrun Action
4727 * <13> 0 1 = Send Preamble before opening flag
4728 * <12> 0 1 = Consecutive Idles share common 0
4729 * <11..8> 0110 Transmitter mode = HDLC/SDLC
4730 * <7..4> 0000 Rx Sub modes, addr/ctrl field handling
4731 * <3..0> 0110 Receiver mode = HDLC/SDLC
4733 * 0000 0110 0000 0110 = 0x0606
4735 if (info->params.mode == MGSL_MODE_RAW) {
4736 RegValue = 0x0001; /* Set Receive mode = external sync */
4738 usc_OutReg( info, IOCR, /* Set IOCR DCD is RxSync Detect Input */
4739 (unsigned short)((usc_InReg(info, IOCR) & ~(BIT13|BIT12)) | BIT12));
4743 * CMR <15> 0 Don't send CRC on Tx Underrun
4744 * CMR <14> x undefined
4745 * CMR <13> 0 Send preamble before openning sync
4746 * CMR <12> 0 Send 8-bit syncs, 1=send Syncs per TxLength
4749 * CMR <11-8) 0100 MonoSync
4751 * 0x00 0100 xxxx xxxx 04xx
4759 if ( info->params.flags & HDLC_FLAG_UNDERRUN_ABORT15 )
4761 else if ( info->params.flags & HDLC_FLAG_UNDERRUN_FLAG )
4763 else if ( info->params.flags & HDLC_FLAG_UNDERRUN_CRC )
4764 RegValue |= BIT15 + BIT14;
4767 if ( info->params.preamble != HDLC_PREAMBLE_PATTERN_NONE )
4771 if ( info->params.mode == MGSL_MODE_HDLC &&
4772 (info->params.flags & HDLC_FLAG_SHARE_ZERO) )
4775 if ( info->params.addr_filter != 0xff )
4777 /* set up receive address filtering */
4778 usc_OutReg( info, RSR, info->params.addr_filter );
4782 usc_OutReg( info, CMR, RegValue );
4783 info->cmr_value = RegValue;
4785 /* Receiver mode Register (RMR)
4787 * <15..13> 000 encoding
4788 * <12..11> 00 FCS = 16bit CRC CCITT (x15 + x12 + x5 + 1)
4789 * <10> 1 1 = Set CRC to all 1s (use for SDLC/HDLC)
4790 * <9> 0 1 = Include Receive chars in CRC
4791 * <8> 1 1 = Use Abort/PE bit as abort indicator
4792 * <7..6> 00 Even parity
4793 * <5> 0 parity disabled
4794 * <4..2> 000 Receive Char Length = 8 bits
4795 * <1..0> 00 Disable Receiver
4797 * 0000 0101 0000 0000 = 0x0500
4802 switch ( info->params.encoding ) {
4803 case HDLC_ENCODING_NRZB: RegValue |= BIT13; break;
4804 case HDLC_ENCODING_NRZI_MARK: RegValue |= BIT14; break;
4805 case HDLC_ENCODING_NRZI_SPACE: RegValue |= BIT14 + BIT13; break;
4806 case HDLC_ENCODING_BIPHASE_MARK: RegValue |= BIT15; break;
4807 case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT15 + BIT13; break;
4808 case HDLC_ENCODING_BIPHASE_LEVEL: RegValue |= BIT15 + BIT14; break;
4809 case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: RegValue |= BIT15 + BIT14 + BIT13; break;
4812 if ( (info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_16_CCITT )
4814 else if ( (info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_32_CCITT )
4815 RegValue |= ( BIT12 | BIT10 | BIT9 );
4817 usc_OutReg( info, RMR, RegValue );
4819 /* Set the Receive count Limit Register (RCLR) to 0xffff. */
4820 /* When an opening flag of an SDLC frame is recognized the */
4821 /* Receive Character count (RCC) is loaded with the value in */
4822 /* RCLR. The RCC is decremented for each received byte. The */
4823 /* value of RCC is stored after the closing flag of the frame */
4824 /* allowing the frame size to be computed. */
4826 usc_OutReg( info, RCLR, RCLRVALUE );
4828 usc_RCmd( info, RCmd_SelectRicrdma_level );
4830 /* Receive Interrupt Control Register (RICR)
4832 * <15..8> ? RxFIFO DMA Request Level
4833 * <7> 0 Exited Hunt IA (Interrupt Arm)
4834 * <6> 0 Idle Received IA
4835 * <5> 0 Break/Abort IA
4837 * <3> 1 Queued status reflects oldest 2 bytes in FIFO
4839 * <1> 1 Rx Overrun IA
4840 * <0> 0 Select TC0 value for readback
4842 * 0000 0000 0000 1000 = 0x000a
4845 /* Carry over the Exit Hunt and Idle Received bits */
4846 /* in case they have been armed by usc_ArmEvents. */
4848 RegValue = usc_InReg( info, RICR ) & 0xc0;
4850 if ( info->bus_type == MGSL_BUS_TYPE_PCI )
4851 usc_OutReg( info, RICR, (u16)(0x030a | RegValue) );
4853 usc_OutReg( info, RICR, (u16)(0x140a | RegValue) );
4855 /* Unlatch all Rx status bits and clear Rx status IRQ Pending */
4857 usc_UnlatchRxstatusBits( info, RXSTATUS_ALL );
4858 usc_ClearIrqPendingBits( info, RECEIVE_STATUS );
4860 /* Transmit mode Register (TMR)
4862 * <15..13> 000 encoding
4863 * <12..11> 00 FCS = 16bit CRC CCITT (x15 + x12 + x5 + 1)
4864 * <10> 1 1 = Start CRC as all 1s (use for SDLC/HDLC)
4865 * <9> 0 1 = Tx CRC Enabled
4866 * <8> 0 1 = Append CRC to end of transmit frame
4867 * <7..6> 00 Transmit parity Even
4868 * <5> 0 Transmit parity Disabled
4869 * <4..2> 000 Tx Char Length = 8 bits
4870 * <1..0> 00 Disable Transmitter
4872 * 0000 0100 0000 0000 = 0x0400
4877 switch ( info->params.encoding ) {
4878 case HDLC_ENCODING_NRZB: RegValue |= BIT13; break;
4879 case HDLC_ENCODING_NRZI_MARK: RegValue |= BIT14; break;
4880 case HDLC_ENCODING_NRZI_SPACE: RegValue |= BIT14 + BIT13; break;
4881 case HDLC_ENCODING_BIPHASE_MARK: RegValue |= BIT15; break;
4882 case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT15 + BIT13; break;
4883 case HDLC_ENCODING_BIPHASE_LEVEL: RegValue |= BIT15 + BIT14; break;
4884 case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: RegValue |= BIT15 + BIT14 + BIT13; break;
4887 if ( (info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_16_CCITT )
4888 RegValue |= BIT9 + BIT8;
4889 else if ( (info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_32_CCITT )
4890 RegValue |= ( BIT12 | BIT10 | BIT9 | BIT8);
4892 usc_OutReg( info, TMR, RegValue );
4894 usc_set_txidle( info );
4897 usc_TCmd( info, TCmd_SelectTicrdma_level );
4899 /* Transmit Interrupt Control Register (TICR)
4901 * <15..8> ? Transmit FIFO DMA Level
4902 * <7> 0 Present IA (Interrupt Arm)
4903 * <6> 0 Idle Sent IA
4904 * <5> 1 Abort Sent IA
4905 * <4> 1 EOF/EOM Sent IA
4907 * <2> 1 1 = Wait for SW Trigger to Start Frame
4908 * <1> 1 Tx Underrun IA
4909 * <0> 0 TC0 constant on read back
4911 * 0000 0000 0011 0110 = 0x0036
4914 if ( info->bus_type == MGSL_BUS_TYPE_PCI )
4915 usc_OutReg( info, TICR, 0x0736 );
4917 usc_OutReg( info, TICR, 0x1436 );
4919 usc_UnlatchTxstatusBits( info, TXSTATUS_ALL );
4920 usc_ClearIrqPendingBits( info, TRANSMIT_STATUS );
4923 ** Transmit Command/Status Register (TCSR)
4925 ** <15..12> 0000 TCmd
4926 ** <11> 0/1 UnderWait
4927 ** <10..08> 000 TxIdle
4931 ** <4> x EOF/EOM Sent
4937 ** 0000 0000 0000 0000 = 0x0000
4939 info->tcsr_value = 0;
4942 info->tcsr_value |= TCSR_UNDERWAIT;
4944 usc_OutReg( info, TCSR, info->tcsr_value );
4946 /* Clock mode Control Register (CMCR)
4948 * <15..14> 00 counter 1 Source = Disabled
4949 * <13..12> 00 counter 0 Source = Disabled
4950 * <11..10> 11 BRG1 Input is TxC Pin
4951 * <9..8> 11 BRG0 Input is TxC Pin
4952 * <7..6> 01 DPLL Input is BRG1 Output
4953 * <5..3> XXX TxCLK comes from Port 0
4954 * <2..0> XXX RxCLK comes from Port 1
4956 * 0000 1111 0111 0111 = 0x0f77
4961 if ( info->params.flags & HDLC_FLAG_RXC_DPLL )
4962 RegValue |= 0x0003; /* RxCLK from DPLL */
4963 else if ( info->params.flags & HDLC_FLAG_RXC_BRG )
4964 RegValue |= 0x0004; /* RxCLK from BRG0 */
4965 else if ( info->params.flags & HDLC_FLAG_RXC_TXCPIN)
4966 RegValue |= 0x0006; /* RxCLK from TXC Input */
4968 RegValue |= 0x0007; /* RxCLK from Port1 */
4970 if ( info->params.flags & HDLC_FLAG_TXC_DPLL )
4971 RegValue |= 0x0018; /* TxCLK from DPLL */
4972 else if ( info->params.flags & HDLC_FLAG_TXC_BRG )
4973 RegValue |= 0x0020; /* TxCLK from BRG0 */
4974 else if ( info->params.flags & HDLC_FLAG_TXC_RXCPIN)
4975 RegValue |= 0x0038; /* RxCLK from TXC Input */
4977 RegValue |= 0x0030; /* TxCLK from Port0 */
4979 usc_OutReg( info, CMCR, RegValue );
4982 /* Hardware Configuration Register (HCR)
4984 * <15..14> 00 CTR0 Divisor:00=32,01=16,10=8,11=4
4985 * <13> 0 CTR1DSel:0=CTR0Div determines CTR0Div
4986 * <12> 0 CVOK:0=report code violation in biphase
4987 * <11..10> 00 DPLL Divisor:00=32,01=16,10=8,11=4
4988 * <9..8> XX DPLL mode:00=disable,01=NRZ,10=Biphase,11=Biphase Level
4989 * <7..6> 00 reserved
4990 * <5> 0 BRG1 mode:0=continuous,1=single cycle
4992 * <3..2> 00 reserved
4993 * <1> 0 BRG0 mode:0=continuous,1=single cycle
4999 if ( info->params.flags & (HDLC_FLAG_RXC_DPLL + HDLC_FLAG_TXC_DPLL) ) {
5004 /* DPLL is enabled. Use BRG1 to provide continuous reference clock */
5005 /* for DPLL. DPLL mode in HCR is dependent on the encoding used. */
5007 if ( info->bus_type == MGSL_BUS_TYPE_PCI )
5008 XtalSpeed = 11059200;
5010 XtalSpeed = 14745600;
5012 if ( info->params.flags & HDLC_FLAG_DPLL_DIV16 ) {
5016 else if ( info->params.flags & HDLC_FLAG_DPLL_DIV8 ) {
5023 /* Tc = (Xtal/Speed) - 1 */
5024 /* If twice the remainder of (Xtal/Speed) is greater than Speed */
5025 /* then rounding up gives a more precise time constant. Instead */
5026 /* of rounding up and then subtracting 1 we just don't subtract */
5027 /* the one in this case. */
5029 /*--------------------------------------------------
5030 * ejz: for DPLL mode, application should use the
5031 * same clock speed as the partner system, even
5032 * though clocking is derived from the input RxData.
5033 * In case the user uses a 0 for the clock speed,
5034 * default to 0xffffffff and don't try to divide by
5036 *--------------------------------------------------*/
5037 if ( info->params.clock_speed )
5039 Tc = (u16)((XtalSpeed/DpllDivisor)/info->params.clock_speed);
5040 if ( !((((XtalSpeed/DpllDivisor) % info->params.clock_speed) * 2)
5041 / info->params.clock_speed) )
5048 /* Write 16-bit Time Constant for BRG1 */
5049 usc_OutReg( info, TC1R, Tc );
5051 RegValue |= BIT4; /* enable BRG1 */
5053 switch ( info->params.encoding ) {
5054 case HDLC_ENCODING_NRZ:
5055 case HDLC_ENCODING_NRZB:
5056 case HDLC_ENCODING_NRZI_MARK:
5057 case HDLC_ENCODING_NRZI_SPACE: RegValue |= BIT8; break;
5058 case HDLC_ENCODING_BIPHASE_MARK:
5059 case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT9; break;
5060 case HDLC_ENCODING_BIPHASE_LEVEL:
5061 case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: RegValue |= BIT9 + BIT8; break;
5065 usc_OutReg( info, HCR, RegValue );
5068 /* Channel Control/status Register (CCSR)
5070 * <15> X RCC FIFO Overflow status (RO)
5071 * <14> X RCC FIFO Not Empty status (RO)
5072 * <13> 0 1 = Clear RCC FIFO (WO)
5073 * <12> X DPLL Sync (RW)
5074 * <11> X DPLL 2 Missed Clocks status (RO)
5075 * <10> X DPLL 1 Missed Clock status (RO)
5076 * <9..8> 00 DPLL Resync on rising and falling edges (RW)
5077 * <7> X SDLC Loop On status (RO)
5078 * <6> X SDLC Loop Send status (RO)
5079 * <5> 1 Bypass counters for TxClk and RxClk (RW)
5080 * <4..2> 000 Last Char of SDLC frame has 8 bits (RW)
5081 * <1..0> 00 reserved
5083 * 0000 0000 0010 0000 = 0x0020
5086 usc_OutReg( info, CCSR, 0x1020 );
5089 if ( info->params.flags & HDLC_FLAG_AUTO_CTS ) {
5090 usc_OutReg( info, SICR,
5091 (u16)(usc_InReg(info,SICR) | SICR_CTS_INACTIVE) );
5095 /* enable Master Interrupt Enable bit (MIE) */
5096 usc_EnableMasterIrqBit( info );
5098 usc_ClearIrqPendingBits( info, RECEIVE_STATUS + RECEIVE_DATA +
5099 TRANSMIT_STATUS + TRANSMIT_DATA + MISC);
5101 /* arm RCC underflow interrupt */
5102 usc_OutReg(info, SICR, (u16)(usc_InReg(info,SICR) | BIT3));
5103 usc_EnableInterrupts(info, MISC);
5106 outw( 0, info->io_base ); /* clear Master Bus Enable (DCAR) */
5107 usc_DmaCmd( info, DmaCmd_ResetAllChannels ); /* disable both DMA channels */
5108 info->mbre_bit = BIT8;
5109 outw( BIT8, info->io_base ); /* set Master Bus Enable (DCAR) */
5111 if (info->bus_type == MGSL_BUS_TYPE_ISA) {
5112 /* Enable DMAEN (Port 7, Bit 14) */
5113 /* This connects the DMA request signal to the ISA bus */
5114 usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT15) & ~BIT14));
5117 /* DMA Control Register (DCR)
5119 * <15..14> 10 Priority mode = Alternating Tx/Rx
5120 * 01 Rx has priority
5121 * 00 Tx has priority
5123 * <13> 1 Enable Priority Preempt per DCR<15..14>
5124 * (WARNING DCR<11..10> must be 00 when this is 1)
5125 * 0 Choose activate channel per DCR<11..10>
5127 * <12> 0 Little Endian for Array/List
5128 * <11..10> 00 Both Channels can use each bus grant
5129 * <9..6> 0000 reserved
5130 * <5> 0 7 CLK - Minimum Bus Re-request Interval
5131 * <4> 0 1 = drive D/C and S/D pins
5132 * <3> 1 1 = Add one wait state to all DMA cycles.
5133 * <2> 0 1 = Strobe /UAS on every transfer.
5134 * <1..0> 11 Addr incrementing only affects LS24 bits
5136 * 0110 0000 0000 1011 = 0x600b
5139 if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
5140 /* PCI adapter does not need DMA wait state */
5141 usc_OutDmaReg( info, DCR, 0xa00b );
5144 usc_OutDmaReg( info, DCR, 0x800b );
5147 /* Receive DMA mode Register (RDMR)
5149 * <15..14> 11 DMA mode = Linked List Buffer mode
5150 * <13> 1 RSBinA/L = store Rx status Block in Arrary/List entry
5151 * <12> 1 Clear count of List Entry after fetching
5152 * <11..10> 00 Address mode = Increment
5153 * <9> 1 Terminate Buffer on RxBound
5154 * <8> 0 Bus Width = 16bits
5155 * <7..0> ? status Bits (write as 0s)
5157 * 1111 0010 0000 0000 = 0xf200
5160 usc_OutDmaReg( info, RDMR, 0xf200 );
5163 /* Transmit DMA mode Register (TDMR)
5165 * <15..14> 11 DMA mode = Linked List Buffer mode
5166 * <13> 1 TCBinA/L = fetch Tx Control Block from List entry
5167 * <12> 1 Clear count of List Entry after fetching
5168 * <11..10> 00 Address mode = Increment
5169 * <9> 1 Terminate Buffer on end of frame
5170 * <8> 0 Bus Width = 16bits
5171 * <7..0> ? status Bits (Read Only so write as 0)
5173 * 1111 0010 0000 0000 = 0xf200
5176 usc_OutDmaReg( info, TDMR, 0xf200 );
5179 /* DMA Interrupt Control Register (DICR)
5181 * <15> 1 DMA Interrupt Enable
5182 * <14> 0 1 = Disable IEO from USC
5183 * <13> 0 1 = Don't provide vector during IntAck
5184 * <12> 1 1 = Include status in Vector
5185 * <10..2> 0 reserved, Must be 0s
5186 * <1> 0 1 = Rx DMA Interrupt Enabled
5187 * <0> 0 1 = Tx DMA Interrupt Enabled
5189 * 1001 0000 0000 0000 = 0x9000
5192 usc_OutDmaReg( info, DICR, 0x9000 );
5194 usc_InDmaReg( info, RDMR ); /* clear pending receive DMA IRQ bits */
5195 usc_InDmaReg( info, TDMR ); /* clear pending transmit DMA IRQ bits */
5196 usc_OutDmaReg( info, CDIR, 0x0303 ); /* clear IUS and Pending for Tx and Rx */
5198 /* Channel Control Register (CCR)
5200 * <15..14> 10 Use 32-bit Tx Control Blocks (TCBs)
5201 * <13> 0 Trigger Tx on SW Command Disabled
5202 * <12> 0 Flag Preamble Disabled
5203 * <11..10> 00 Preamble Length
5204 * <9..8> 00 Preamble Pattern
5205 * <7..6> 10 Use 32-bit Rx status Blocks (RSBs)
5206 * <5> 0 Trigger Rx on SW Command Disabled
5209 * 1000 0000 1000 0000 = 0x8080
5214 switch ( info->params.preamble_length ) {
5215 case HDLC_PREAMBLE_LENGTH_16BITS: RegValue |= BIT10; break;
5216 case HDLC_PREAMBLE_LENGTH_32BITS: RegValue |= BIT11; break;
5217 case HDLC_PREAMBLE_LENGTH_64BITS: RegValue |= BIT11 + BIT10; break;
5220 switch ( info->params.preamble ) {
5221 case HDLC_PREAMBLE_PATTERN_FLAGS: RegValue |= BIT8 + BIT12; break;
5222 case HDLC_PREAMBLE_PATTERN_ONES: RegValue |= BIT8; break;
5223 case HDLC_PREAMBLE_PATTERN_10: RegValue |= BIT9; break;
5224 case HDLC_PREAMBLE_PATTERN_01: RegValue |= BIT9 + BIT8; break;
5227 usc_OutReg( info, CCR, RegValue );
5231 * Burst/Dwell Control Register
5233 * <15..8> 0x20 Maximum number of transfers per bus grant
5234 * <7..0> 0x00 Maximum number of clock cycles per bus grant
5237 if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
5238 /* don't limit bus occupancy on PCI adapter */
5239 usc_OutDmaReg( info, BDCR, 0x0000 );
5242 usc_OutDmaReg( info, BDCR, 0x2000 );
5244 usc_stop_transmitter(info);
5245 usc_stop_receiver(info);
5247 } /* end of usc_set_sdlc_mode() */
5249 /* usc_enable_loopback()
5251 * Set the 16C32 for internal loopback mode.
5252 * The TxCLK and RxCLK signals are generated from the BRG0 and
5253 * the TxD is looped back to the RxD internally.
5255 * Arguments: info pointer to device instance data
5256 * enable 1 = enable loopback, 0 = disable
5257 * Return Value: None
5259 static void usc_enable_loopback(struct mgsl_struct *info, int enable)
5262 /* blank external TXD output */
5263 usc_OutReg(info,IOCR,usc_InReg(info,IOCR) | (BIT7+BIT6));
5265 /* Clock mode Control Register (CMCR)
5267 * <15..14> 00 counter 1 Disabled
5268 * <13..12> 00 counter 0 Disabled
5269 * <11..10> 11 BRG1 Input is TxC Pin
5270 * <9..8> 11 BRG0 Input is TxC Pin
5271 * <7..6> 01 DPLL Input is BRG1 Output
5272 * <5..3> 100 TxCLK comes from BRG0
5273 * <2..0> 100 RxCLK comes from BRG0
5275 * 0000 1111 0110 0100 = 0x0f64
5278 usc_OutReg( info, CMCR, 0x0f64 );
5280 /* Write 16-bit Time Constant for BRG0 */
5281 /* use clock speed if available, otherwise use 8 for diagnostics */
5282 if (info->params.clock_speed) {
5283 if (info->bus_type == MGSL_BUS_TYPE_PCI)
5284 usc_OutReg(info, TC0R, (u16)((11059200/info->params.clock_speed)-1));
5286 usc_OutReg(info, TC0R, (u16)((14745600/info->params.clock_speed)-1));
5288 usc_OutReg(info, TC0R, (u16)8);
5290 /* Hardware Configuration Register (HCR) Clear Bit 1, BRG0
5291 mode = Continuous Set Bit 0 to enable BRG0. */
5292 usc_OutReg( info, HCR, (u16)((usc_InReg( info, HCR ) & ~BIT1) | BIT0) );
5294 /* Input/Output Control Reg, <2..0> = 100, Drive RxC pin with BRG0 */
5295 usc_OutReg(info, IOCR, (u16)((usc_InReg(info, IOCR) & 0xfff8) | 0x0004));
5297 /* set Internal Data loopback mode */
5298 info->loopback_bits = 0x300;
5299 outw( 0x0300, info->io_base + CCAR );
5301 /* enable external TXD output */
5302 usc_OutReg(info,IOCR,usc_InReg(info,IOCR) & ~(BIT7+BIT6));
5304 /* clear Internal Data loopback mode */
5305 info->loopback_bits = 0;
5306 outw( 0,info->io_base + CCAR );
5309 } /* end of usc_enable_loopback() */
5311 /* usc_enable_aux_clock()
5313 * Enabled the AUX clock output at the specified frequency.
5317 * info pointer to device extension
5318 * data_rate data rate of clock in bits per second
5319 * A data rate of 0 disables the AUX clock.
5321 * Return Value: None
5323 static void usc_enable_aux_clock( struct mgsl_struct *info, u32 data_rate )
5329 if ( info->bus_type == MGSL_BUS_TYPE_PCI )
5330 XtalSpeed = 11059200;
5332 XtalSpeed = 14745600;
5335 /* Tc = (Xtal/Speed) - 1 */
5336 /* If twice the remainder of (Xtal/Speed) is greater than Speed */
5337 /* then rounding up gives a more precise time constant. Instead */
5338 /* of rounding up and then subtracting 1 we just don't subtract */
5339 /* the one in this case. */
5342 Tc = (u16)(XtalSpeed/data_rate);
5343 if ( !(((XtalSpeed % data_rate) * 2) / data_rate) )
5346 /* Write 16-bit Time Constant for BRG0 */
5347 usc_OutReg( info, TC0R, Tc );
5350 * Hardware Configuration Register (HCR)
5351 * Clear Bit 1, BRG0 mode = Continuous
5352 * Set Bit 0 to enable BRG0.
5355 usc_OutReg( info, HCR, (u16)((usc_InReg( info, HCR ) & ~BIT1) | BIT0) );
5357 /* Input/Output Control Reg, <2..0> = 100, Drive RxC pin with BRG0 */
5358 usc_OutReg( info, IOCR, (u16)((usc_InReg(info, IOCR) & 0xfff8) | 0x0004) );
5360 /* data rate == 0 so turn off BRG0 */
5361 usc_OutReg( info, HCR, (u16)(usc_InReg( info, HCR ) & ~BIT0) );
5364 } /* end of usc_enable_aux_clock() */
5368 * usc_process_rxoverrun_sync()
5370 * This function processes a receive overrun by resetting the
5371 * receive DMA buffers and issuing a Purge Rx FIFO command
5372 * to allow the receiver to continue receiving.
5376 * info pointer to device extension
5378 * Return Value: None
5380 static void usc_process_rxoverrun_sync( struct mgsl_struct *info )
5384 int frame_start_index;
5385 int start_of_frame_found = FALSE;
5386 int end_of_frame_found = FALSE;
5387 int reprogram_dma = FALSE;
5389 DMABUFFERENTRY *buffer_list = info->rx_buffer_list;
5392 usc_DmaCmd( info, DmaCmd_PauseRxChannel );
5393 usc_RCmd( info, RCmd_EnterHuntmode );
5394 usc_RTCmd( info, RTCmd_PurgeRxFifo );
5396 /* CurrentRxBuffer points to the 1st buffer of the next */
5397 /* possibly available receive frame. */
5399 frame_start_index = start_index = end_index = info->current_rx_buffer;
5401 /* Search for an unfinished string of buffers. This means */
5402 /* that a receive frame started (at least one buffer with */
5403 /* count set to zero) but there is no terminiting buffer */
5404 /* (status set to non-zero). */
5406 while( !buffer_list[end_index].count )
5408 /* Count field has been reset to zero by 16C32. */
5409 /* This buffer is currently in use. */
5411 if ( !start_of_frame_found )
5413 start_of_frame_found = TRUE;
5414 frame_start_index = end_index;
5415 end_of_frame_found = FALSE;
5418 if ( buffer_list[end_index].status )
5420 /* Status field has been set by 16C32. */
5421 /* This is the last buffer of a received frame. */
5423 /* We want to leave the buffers for this frame intact. */
5424 /* Move on to next possible frame. */
5426 start_of_frame_found = FALSE;
5427 end_of_frame_found = TRUE;
5430 /* advance to next buffer entry in linked list */
5432 if ( end_index == info->rx_buffer_count )
5435 if ( start_index == end_index )
5437 /* The entire list has been searched with all Counts == 0 and */
5438 /* all Status == 0. The receive buffers are */
5439 /* completely screwed, reset all receive buffers! */
5440 mgsl_reset_rx_dma_buffers( info );
5441 frame_start_index = 0;
5442 start_of_frame_found = FALSE;
5443 reprogram_dma = TRUE;
5448 if ( start_of_frame_found && !end_of_frame_found )
5450 /* There is an unfinished string of receive DMA buffers */
5451 /* as a result of the receiver overrun. */
5453 /* Reset the buffers for the unfinished frame */
5454 /* and reprogram the receive DMA controller to start */
5455 /* at the 1st buffer of unfinished frame. */
5457 start_index = frame_start_index;
5461 *((unsigned long *)&(info->rx_buffer_list[start_index++].count)) = DMABUFFERSIZE;
5463 /* Adjust index for wrap around. */
5464 if ( start_index == info->rx_buffer_count )
5467 } while( start_index != end_index );
5469 reprogram_dma = TRUE;
5472 if ( reprogram_dma )
5474 usc_UnlatchRxstatusBits(info,RXSTATUS_ALL);
5475 usc_ClearIrqPendingBits(info, RECEIVE_DATA|RECEIVE_STATUS);
5476 usc_UnlatchRxstatusBits(info, RECEIVE_DATA|RECEIVE_STATUS);
5478 usc_EnableReceiver(info,DISABLE_UNCONDITIONAL);
5480 /* This empties the receive FIFO and loads the RCC with RCLR */
5481 usc_OutReg( info, CCSR, (u16)(usc_InReg(info,CCSR) | BIT13) );
5483 /* program 16C32 with physical address of 1st DMA buffer entry */
5484 phys_addr = info->rx_buffer_list[frame_start_index].phys_entry;
5485 usc_OutDmaReg( info, NRARL, (u16)phys_addr );
5486 usc_OutDmaReg( info, NRARU, (u16)(phys_addr >> 16) );
5488 usc_UnlatchRxstatusBits( info, RXSTATUS_ALL );
5489 usc_ClearIrqPendingBits( info, RECEIVE_DATA + RECEIVE_STATUS );
5490 usc_EnableInterrupts( info, RECEIVE_STATUS );
5492 /* 1. Arm End of Buffer (EOB) Receive DMA Interrupt (BIT2 of RDIAR) */
5493 /* 2. Enable Receive DMA Interrupts (BIT1 of DICR) */
5495 usc_OutDmaReg( info, RDIAR, BIT3 + BIT2 );
5496 usc_OutDmaReg( info, DICR, (u16)(usc_InDmaReg(info,DICR) | BIT1) );
5497 usc_DmaCmd( info, DmaCmd_InitRxChannel );
5498 if ( info->params.flags & HDLC_FLAG_AUTO_DCD )
5499 usc_EnableReceiver(info,ENABLE_AUTO_DCD);
5501 usc_EnableReceiver(info,ENABLE_UNCONDITIONAL);
5505 /* This empties the receive FIFO and loads the RCC with RCLR */
5506 usc_OutReg( info, CCSR, (u16)(usc_InReg(info,CCSR) | BIT13) );
5507 usc_RTCmd( info, RTCmd_PurgeRxFifo );
5510 } /* end of usc_process_rxoverrun_sync() */
5512 /* usc_stop_receiver()
5514 * Disable USC receiver
5516 * Arguments: info pointer to device instance data
5517 * Return Value: None
5519 static void usc_stop_receiver( struct mgsl_struct *info )
5521 if (debug_level >= DEBUG_LEVEL_ISR)
5522 printk("%s(%d):usc_stop_receiver(%s)\n",
5523 __FILE__,__LINE__, info->device_name );
5525 /* Disable receive DMA channel. */
5526 /* This also disables receive DMA channel interrupts */
5527 usc_DmaCmd( info, DmaCmd_ResetRxChannel );
5529 usc_UnlatchRxstatusBits( info, RXSTATUS_ALL );
5530 usc_ClearIrqPendingBits( info, RECEIVE_DATA + RECEIVE_STATUS );
5531 usc_DisableInterrupts( info, RECEIVE_DATA + RECEIVE_STATUS );
5533 usc_EnableReceiver(info,DISABLE_UNCONDITIONAL);
5535 /* This empties the receive FIFO and loads the RCC with RCLR */
5536 usc_OutReg( info, CCSR, (u16)(usc_InReg(info,CCSR) | BIT13) );
5537 usc_RTCmd( info, RTCmd_PurgeRxFifo );
5539 info->rx_enabled = 0;
5540 info->rx_overflow = 0;
5541 info->rx_rcc_underrun = 0;
5543 } /* end of stop_receiver() */
5545 /* usc_start_receiver()
5547 * Enable the USC receiver
5549 * Arguments: info pointer to device instance data
5550 * Return Value: None
5552 static void usc_start_receiver( struct mgsl_struct *info )
5556 if (debug_level >= DEBUG_LEVEL_ISR)
5557 printk("%s(%d):usc_start_receiver(%s)\n",
5558 __FILE__,__LINE__, info->device_name );
5560 mgsl_reset_rx_dma_buffers( info );
5561 usc_stop_receiver( info );
5563 usc_OutReg( info, CCSR, (u16)(usc_InReg(info,CCSR) | BIT13) );
5564 usc_RTCmd( info, RTCmd_PurgeRxFifo );
5566 if ( info->params.mode == MGSL_MODE_HDLC ||
5567 info->params.mode == MGSL_MODE_RAW ) {
5568 /* DMA mode Transfers */
5569 /* Program the DMA controller. */
5570 /* Enable the DMA controller end of buffer interrupt. */
5572 /* program 16C32 with physical address of 1st DMA buffer entry */
5573 phys_addr = info->rx_buffer_list[0].phys_entry;
5574 usc_OutDmaReg( info, NRARL, (u16)phys_addr );
5575 usc_OutDmaReg( info, NRARU, (u16)(phys_addr >> 16) );
5577 usc_UnlatchRxstatusBits( info, RXSTATUS_ALL );
5578 usc_ClearIrqPendingBits( info, RECEIVE_DATA + RECEIVE_STATUS );
5579 usc_EnableInterrupts( info, RECEIVE_STATUS );
5581 /* 1. Arm End of Buffer (EOB) Receive DMA Interrupt (BIT2 of RDIAR) */
5582 /* 2. Enable Receive DMA Interrupts (BIT1 of DICR) */
5584 usc_OutDmaReg( info, RDIAR, BIT3 + BIT2 );
5585 usc_OutDmaReg( info, DICR, (u16)(usc_InDmaReg(info,DICR) | BIT1) );
5586 usc_DmaCmd( info, DmaCmd_InitRxChannel );
5587 if ( info->params.flags & HDLC_FLAG_AUTO_DCD )
5588 usc_EnableReceiver(info,ENABLE_AUTO_DCD);
5590 usc_EnableReceiver(info,ENABLE_UNCONDITIONAL);
5592 usc_UnlatchRxstatusBits(info, RXSTATUS_ALL);
5593 usc_ClearIrqPendingBits(info, RECEIVE_DATA + RECEIVE_STATUS);
5594 usc_EnableInterrupts(info, RECEIVE_DATA);
5596 usc_RTCmd( info, RTCmd_PurgeRxFifo );
5597 usc_RCmd( info, RCmd_EnterHuntmode );
5599 usc_EnableReceiver(info,ENABLE_UNCONDITIONAL);
5602 usc_OutReg( info, CCSR, 0x1020 );
5604 info->rx_enabled = 1;
5606 } /* end of usc_start_receiver() */
5608 /* usc_start_transmitter()
5610 * Enable the USC transmitter and send a transmit frame if
5611 * one is loaded in the DMA buffers.
5613 * Arguments: info pointer to device instance data
5614 * Return Value: None
5616 static void usc_start_transmitter( struct mgsl_struct *info )
5619 unsigned int FrameSize;
5621 if (debug_level >= DEBUG_LEVEL_ISR)
5622 printk("%s(%d):usc_start_transmitter(%s)\n",
5623 __FILE__,__LINE__, info->device_name );
5625 if ( info->xmit_cnt ) {
5627 /* If auto RTS enabled and RTS is inactive, then assert */
5628 /* RTS and set a flag indicating that the driver should */
5629 /* negate RTS when the transmission completes. */
5631 info->drop_rts_on_tx_done = 0;
5633 if ( info->params.flags & HDLC_FLAG_AUTO_RTS ) {
5634 usc_get_serial_signals( info );
5635 if ( !(info->serial_signals & SerialSignal_RTS) ) {
5636 info->serial_signals |= SerialSignal_RTS;
5637 usc_set_serial_signals( info );
5638 info->drop_rts_on_tx_done = 1;
5643 if ( info->params.mode == MGSL_MODE_ASYNC ) {
5644 if ( !info->tx_active ) {
5645 usc_UnlatchTxstatusBits(info, TXSTATUS_ALL);
5646 usc_ClearIrqPendingBits(info, TRANSMIT_STATUS + TRANSMIT_DATA);
5647 usc_EnableInterrupts(info, TRANSMIT_DATA);
5648 usc_load_txfifo(info);
5651 /* Disable transmit DMA controller while programming. */
5652 usc_DmaCmd( info, DmaCmd_ResetTxChannel );
5654 /* Transmit DMA buffer is loaded, so program USC */
5655 /* to send the frame contained in the buffers. */
5657 FrameSize = info->tx_buffer_list[info->start_tx_dma_buffer].rcc;
5659 /* if operating in Raw sync mode, reset the rcc component
5660 * of the tx dma buffer entry, otherwise, the serial controller
5661 * will send a closing sync char after this count.
5663 if ( info->params.mode == MGSL_MODE_RAW )
5664 info->tx_buffer_list[info->start_tx_dma_buffer].rcc = 0;
5666 /* Program the Transmit Character Length Register (TCLR) */
5667 /* and clear FIFO (TCC is loaded with TCLR on FIFO clear) */
5668 usc_OutReg( info, TCLR, (u16)FrameSize );
5670 usc_RTCmd( info, RTCmd_PurgeTxFifo );
5672 /* Program the address of the 1st DMA Buffer Entry in linked list */
5673 phys_addr = info->tx_buffer_list[info->start_tx_dma_buffer].phys_entry;
5674 usc_OutDmaReg( info, NTARL, (u16)phys_addr );
5675 usc_OutDmaReg( info, NTARU, (u16)(phys_addr >> 16) );
5677 usc_UnlatchTxstatusBits( info, TXSTATUS_ALL );
5678 usc_ClearIrqPendingBits( info, TRANSMIT_STATUS );
5679 usc_EnableInterrupts( info, TRANSMIT_STATUS );
5681 if ( info->params.mode == MGSL_MODE_RAW &&
5682 info->num_tx_dma_buffers > 1 ) {
5683 /* When running external sync mode, attempt to 'stream' transmit */
5684 /* by filling tx dma buffers as they become available. To do this */
5685 /* we need to enable Tx DMA EOB Status interrupts : */
5687 /* 1. Arm End of Buffer (EOB) Transmit DMA Interrupt (BIT2 of TDIAR) */
5688 /* 2. Enable Transmit DMA Interrupts (BIT0 of DICR) */
5690 usc_OutDmaReg( info, TDIAR, BIT2|BIT3 );
5691 usc_OutDmaReg( info, DICR, (u16)(usc_InDmaReg(info,DICR) | BIT0) );
5694 /* Initialize Transmit DMA Channel */
5695 usc_DmaCmd( info, DmaCmd_InitTxChannel );
5697 usc_TCmd( info, TCmd_SendFrame );
5699 mod_timer(&info->tx_timer, jiffies +
5700 msecs_to_jiffies(5000));
5702 info->tx_active = 1;
5705 if ( !info->tx_enabled ) {
5706 info->tx_enabled = 1;
5707 if ( info->params.flags & HDLC_FLAG_AUTO_CTS )
5708 usc_EnableTransmitter(info,ENABLE_AUTO_CTS);
5710 usc_EnableTransmitter(info,ENABLE_UNCONDITIONAL);
5713 } /* end of usc_start_transmitter() */
5715 /* usc_stop_transmitter()
5717 * Stops the transmitter and DMA
5719 * Arguments: info pointer to device isntance data
5720 * Return Value: None
5722 static void usc_stop_transmitter( struct mgsl_struct *info )
5724 if (debug_level >= DEBUG_LEVEL_ISR)
5725 printk("%s(%d):usc_stop_transmitter(%s)\n",
5726 __FILE__,__LINE__, info->device_name );
5728 del_timer(&info->tx_timer);
5730 usc_UnlatchTxstatusBits( info, TXSTATUS_ALL );
5731 usc_ClearIrqPendingBits( info, TRANSMIT_STATUS + TRANSMIT_DATA );
5732 usc_DisableInterrupts( info, TRANSMIT_STATUS + TRANSMIT_DATA );
5734 usc_EnableTransmitter(info,DISABLE_UNCONDITIONAL);
5735 usc_DmaCmd( info, DmaCmd_ResetTxChannel );
5736 usc_RTCmd( info, RTCmd_PurgeTxFifo );
5738 info->tx_enabled = 0;
5739 info->tx_active = 0;
5741 } /* end of usc_stop_transmitter() */
5743 /* usc_load_txfifo()
5745 * Fill the transmit FIFO until the FIFO is full or
5746 * there is no more data to load.
5748 * Arguments: info pointer to device extension (instance data)
5749 * Return Value: None
5751 static void usc_load_txfifo( struct mgsl_struct *info )
5756 if ( !info->xmit_cnt && !info->x_char )
5759 /* Select transmit FIFO status readback in TICR */
5760 usc_TCmd( info, TCmd_SelectTicrTxFifostatus );
5762 /* load the Transmit FIFO until FIFOs full or all data sent */
5764 while( (Fifocount = usc_InReg(info, TICR) >> 8) && info->xmit_cnt ) {
5765 /* there is more space in the transmit FIFO and */
5766 /* there is more data in transmit buffer */
5768 if ( (info->xmit_cnt > 1) && (Fifocount > 1) && !info->x_char ) {
5769 /* write a 16-bit word from transmit buffer to 16C32 */
5771 TwoBytes[0] = info->xmit_buf[info->xmit_tail++];
5772 info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
5773 TwoBytes[1] = info->xmit_buf[info->xmit_tail++];
5774 info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
5776 outw( *((u16 *)TwoBytes), info->io_base + DATAREG);
5778 info->xmit_cnt -= 2;
5779 info->icount.tx += 2;
5781 /* only 1 byte left to transmit or 1 FIFO slot left */
5783 outw( (inw( info->io_base + CCAR) & 0x0780) | (TDR+LSBONLY),
5784 info->io_base + CCAR );
5787 /* transmit pending high priority char */
5788 outw( info->x_char,info->io_base + CCAR );
5791 outw( info->xmit_buf[info->xmit_tail++],info->io_base + CCAR );
5792 info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
5799 } /* end of usc_load_txfifo() */
5803 * Reset the adapter to a known state and prepare it for further use.
5805 * Arguments: info pointer to device instance data
5806 * Return Value: None
5808 static void usc_reset( struct mgsl_struct *info )
5810 if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
5814 /* Set BIT30 of Misc Control Register */
5815 /* (Local Control Register 0x50) to force reset of USC. */
5817 volatile u32 *MiscCtrl = (u32 *)(info->lcr_base + 0x50);
5818 u32 *LCR0BRDR = (u32 *)(info->lcr_base + 0x28);
5820 info->misc_ctrl_value |= BIT30;
5821 *MiscCtrl = info->misc_ctrl_value;
5824 * Force at least 170ns delay before clearing
5825 * reset bit. Each read from LCR takes at least
5826 * 30ns so 10 times for 300ns to be safe.
5829 readval = *MiscCtrl;
5831 info->misc_ctrl_value &= ~BIT30;
5832 *MiscCtrl = info->misc_ctrl_value;
5834 *LCR0BRDR = BUS_DESCRIPTOR(
5835 1, // Write Strobe Hold (0-3)
5836 2, // Write Strobe Delay (0-3)
5837 2, // Read Strobe Delay (0-3)
5838 0, // NWDD (Write data-data) (0-3)
5839 4, // NWAD (Write Addr-data) (0-31)
5840 0, // NXDA (Read/Write Data-Addr) (0-3)
5841 0, // NRDD (Read Data-Data) (0-3)
5842 5 // NRAD (Read Addr-Data) (0-31)
5846 outb( 0,info->io_base + 8 );
5850 info->loopback_bits = 0;
5851 info->usc_idle_mode = 0;
5854 * Program the Bus Configuration Register (BCR)
5856 * <15> 0 Don't use separate address
5857 * <14..6> 0 reserved
5858 * <5..4> 00 IAckmode = Default, don't care
5859 * <3> 1 Bus Request Totem Pole output
5860 * <2> 1 Use 16 Bit data bus
5861 * <1> 0 IRQ Totem Pole output
5862 * <0> 0 Don't Shift Right Addr
5864 * 0000 0000 0000 1100 = 0x000c
5866 * By writing to io_base + SDPIN the Wait/Ack pin is
5867 * programmed to work as a Wait pin.
5870 outw( 0x000c,info->io_base + SDPIN );
5873 outw( 0,info->io_base );
5874 outw( 0,info->io_base + CCAR );
5876 /* select little endian byte ordering */
5877 usc_RTCmd( info, RTCmd_SelectLittleEndian );
5880 /* Port Control Register (PCR)
5882 * <15..14> 11 Port 7 is Output (~DMAEN, Bit 14 : 0 = Enabled)
5883 * <13..12> 11 Port 6 is Output (~INTEN, Bit 12 : 0 = Enabled)
5884 * <11..10> 00 Port 5 is Input (No Connect, Don't Care)
5885 * <9..8> 00 Port 4 is Input (No Connect, Don't Care)
5886 * <7..6> 11 Port 3 is Output (~RTS, Bit 6 : 0 = Enabled )
5887 * <5..4> 11 Port 2 is Output (~DTR, Bit 4 : 0 = Enabled )
5888 * <3..2> 01 Port 1 is Input (Dedicated RxC)
5889 * <1..0> 01 Port 0 is Input (Dedicated TxC)
5891 * 1111 0000 1111 0101 = 0xf0f5
5894 usc_OutReg( info, PCR, 0xf0f5 );
5898 * Input/Output Control Register
5900 * <15..14> 00 CTS is active low input
5901 * <13..12> 00 DCD is active low input
5902 * <11..10> 00 TxREQ pin is input (DSR)
5903 * <9..8> 00 RxREQ pin is input (RI)
5904 * <7..6> 00 TxD is output (Transmit Data)
5905 * <5..3> 000 TxC Pin in Input (14.7456MHz Clock)
5906 * <2..0> 100 RxC is Output (drive with BRG0)
5908 * 0000 0000 0000 0100 = 0x0004
5911 usc_OutReg( info, IOCR, 0x0004 );
5913 } /* end of usc_reset() */
5915 /* usc_set_async_mode()
5917 * Program adapter for asynchronous communications.
5919 * Arguments: info pointer to device instance data
5920 * Return Value: None
5922 static void usc_set_async_mode( struct mgsl_struct *info )
5926 /* disable interrupts while programming USC */
5927 usc_DisableMasterIrqBit( info );
5929 outw( 0, info->io_base ); /* clear Master Bus Enable (DCAR) */
5930 usc_DmaCmd( info, DmaCmd_ResetAllChannels ); /* disable both DMA channels */
5932 usc_loopback_frame( info );
5934 /* Channel mode Register (CMR)
5936 * <15..14> 00 Tx Sub modes, 00 = 1 Stop Bit
5937 * <13..12> 00 00 = 16X Clock
5938 * <11..8> 0000 Transmitter mode = Asynchronous
5939 * <7..6> 00 reserved?
5940 * <5..4> 00 Rx Sub modes, 00 = 16X Clock
5941 * <3..0> 0000 Receiver mode = Asynchronous
5943 * 0000 0000 0000 0000 = 0x0
5947 if ( info->params.stop_bits != 1 )
5949 usc_OutReg( info, CMR, RegValue );
5952 /* Receiver mode Register (RMR)
5954 * <15..13> 000 encoding = None
5955 * <12..08> 00000 reserved (Sync Only)
5956 * <7..6> 00 Even parity
5957 * <5> 0 parity disabled
5958 * <4..2> 000 Receive Char Length = 8 bits
5959 * <1..0> 00 Disable Receiver
5961 * 0000 0000 0000 0000 = 0x0
5966 if ( info->params.data_bits != 8 )
5967 RegValue |= BIT4+BIT3+BIT2;
5969 if ( info->params.parity != ASYNC_PARITY_NONE ) {
5971 if ( info->params.parity != ASYNC_PARITY_ODD )
5975 usc_OutReg( info, RMR, RegValue );
5978 /* Set IRQ trigger level */
5980 usc_RCmd( info, RCmd_SelectRicrIntLevel );
5983 /* Receive Interrupt Control Register (RICR)
5985 * <15..8> ? RxFIFO IRQ Request Level
5987 * Note: For async mode the receive FIFO level must be set
5988 * to 0 to avoid the situation where the FIFO contains fewer bytes
5989 * than the trigger level and no more data is expected.
5991 * <7> 0 Exited Hunt IA (Interrupt Arm)
5992 * <6> 0 Idle Received IA
5993 * <5> 0 Break/Abort IA
5995 * <3> 0 Queued status reflects oldest byte in FIFO
5997 * <1> 0 Rx Overrun IA
5998 * <0> 0 Select TC0 value for readback
6000 * 0000 0000 0100 0000 = 0x0000 + (FIFOLEVEL in MSB)
6003 usc_OutReg( info, RICR, 0x0000 );
6005 usc_UnlatchRxstatusBits( info, RXSTATUS_ALL );
6006 usc_ClearIrqPendingBits( info, RECEIVE_STATUS );
6009 /* Transmit mode Register (TMR)
6011 * <15..13> 000 encoding = None
6012 * <12..08> 00000 reserved (Sync Only)
6013 * <7..6> 00 Transmit parity Even
6014 * <5> 0 Transmit parity Disabled
6015 * <4..2> 000 Tx Char Length = 8 bits
6016 * <1..0> 00 Disable Transmitter
6018 * 0000 0000 0000 0000 = 0x0
6023 if ( info->params.data_bits != 8 )
6024 RegValue |= BIT4+BIT3+BIT2;
6026 if ( info->params.parity != ASYNC_PARITY_NONE ) {
6028 if ( info->params.parity != ASYNC_PARITY_ODD )
6032 usc_OutReg( info, TMR, RegValue );
6034 usc_set_txidle( info );
6037 /* Set IRQ trigger level */
6039 usc_TCmd( info, TCmd_SelectTicrIntLevel );
6042 /* Transmit Interrupt Control Register (TICR)
6044 * <15..8> ? Transmit FIFO IRQ Level
6045 * <7> 0 Present IA (Interrupt Arm)
6046 * <6> 1 Idle Sent IA
6047 * <5> 0 Abort Sent IA
6048 * <4> 0 EOF/EOM Sent IA
6050 * <2> 0 1 = Wait for SW Trigger to Start Frame
6051 * <1> 0 Tx Underrun IA
6052 * <0> 0 TC0 constant on read back
6054 * 0000 0000 0100 0000 = 0x0040
6057 usc_OutReg( info, TICR, 0x1f40 );
6059 usc_UnlatchTxstatusBits( info, TXSTATUS_ALL );
6060 usc_ClearIrqPendingBits( info, TRANSMIT_STATUS );
6062 usc_enable_async_clock( info, info->params.data_rate );
6065 /* Channel Control/status Register (CCSR)
6067 * <15> X RCC FIFO Overflow status (RO)
6068 * <14> X RCC FIFO Not Empty status (RO)
6069 * <13> 0 1 = Clear RCC FIFO (WO)
6070 * <12> X DPLL in Sync status (RO)
6071 * <11> X DPLL 2 Missed Clocks status (RO)
6072 * <10> X DPLL 1 Missed Clock status (RO)
6073 * <9..8> 00 DPLL Resync on rising and falling edges (RW)
6074 * <7> X SDLC Loop On status (RO)
6075 * <6> X SDLC Loop Send status (RO)
6076 * <5> 1 Bypass counters for TxClk and RxClk (RW)
6077 * <4..2> 000 Last Char of SDLC frame has 8 bits (RW)
6078 * <1..0> 00 reserved
6080 * 0000 0000 0010 0000 = 0x0020
6083 usc_OutReg( info, CCSR, 0x0020 );
6085 usc_DisableInterrupts( info, TRANSMIT_STATUS + TRANSMIT_DATA +
6086 RECEIVE_DATA + RECEIVE_STATUS );
6088 usc_ClearIrqPendingBits( info, TRANSMIT_STATUS + TRANSMIT_DATA +
6089 RECEIVE_DATA + RECEIVE_STATUS );
6091 usc_EnableMasterIrqBit( info );
6093 if (info->bus_type == MGSL_BUS_TYPE_ISA) {
6094 /* Enable INTEN (Port 6, Bit12) */
6095 /* This connects the IRQ request signal to the ISA bus */
6096 usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT13) & ~BIT12));
6099 if (info->params.loopback) {
6100 info->loopback_bits = 0x300;
6101 outw(0x0300, info->io_base + CCAR);
6104 } /* end of usc_set_async_mode() */
6106 /* usc_loopback_frame()
6108 * Loop back a small (2 byte) dummy SDLC frame.
6109 * Interrupts and DMA are NOT used. The purpose of this is to
6110 * clear any 'stale' status info left over from running in async mode.
6112 * The 16C32 shows the strange behaviour of marking the 1st
6113 * received SDLC frame with a CRC error even when there is no
6114 * CRC error. To get around this a small dummy from of 2 bytes
6115 * is looped back when switching from async to sync mode.
6117 * Arguments: info pointer to device instance data
6118 * Return Value: None
6120 static void usc_loopback_frame( struct mgsl_struct *info )
6123 unsigned long oldmode = info->params.mode;
6125 info->params.mode = MGSL_MODE_HDLC;
6127 usc_DisableMasterIrqBit( info );
6129 usc_set_sdlc_mode( info );
6130 usc_enable_loopback( info, 1 );
6132 /* Write 16-bit Time Constant for BRG0 */
6133 usc_OutReg( info, TC0R, 0 );
6135 /* Channel Control Register (CCR)
6137 * <15..14> 00 Don't use 32-bit Tx Control Blocks (TCBs)
6138 * <13> 0 Trigger Tx on SW Command Disabled
6139 * <12> 0 Flag Preamble Disabled
6140 * <11..10> 00 Preamble Length = 8-Bits
6141 * <9..8> 01 Preamble Pattern = flags
6142 * <7..6> 10 Don't use 32-bit Rx status Blocks (RSBs)
6143 * <5> 0 Trigger Rx on SW Command Disabled
6146 * 0000 0001 0000 0000 = 0x0100
6149 usc_OutReg( info, CCR, 0x0100 );
6151 /* SETUP RECEIVER */
6152 usc_RTCmd( info, RTCmd_PurgeRxFifo );
6153 usc_EnableReceiver(info,ENABLE_UNCONDITIONAL);
6155 /* SETUP TRANSMITTER */
6156 /* Program the Transmit Character Length Register (TCLR) */
6157 /* and clear FIFO (TCC is loaded with TCLR on FIFO clear) */
6158 usc_OutReg( info, TCLR, 2 );
6159 usc_RTCmd( info, RTCmd_PurgeTxFifo );
6161 /* unlatch Tx status bits, and start transmit channel. */
6162 usc_UnlatchTxstatusBits(info,TXSTATUS_ALL);
6163 outw(0,info->io_base + DATAREG);
6165 /* ENABLE TRANSMITTER */
6166 usc_TCmd( info, TCmd_SendFrame );
6167 usc_EnableTransmitter(info,ENABLE_UNCONDITIONAL);
6169 /* WAIT FOR RECEIVE COMPLETE */
6170 for (i=0 ; i<1000 ; i++)
6171 if (usc_InReg( info, RCSR ) & (BIT8 + BIT4 + BIT3 + BIT1))
6174 /* clear Internal Data loopback mode */
6175 usc_enable_loopback(info, 0);
6177 usc_EnableMasterIrqBit(info);
6179 info->params.mode = oldmode;
6181 } /* end of usc_loopback_frame() */
6183 /* usc_set_sync_mode() Programs the USC for SDLC communications.
6185 * Arguments: info pointer to adapter info structure
6186 * Return Value: None
6188 static void usc_set_sync_mode( struct mgsl_struct *info )
6190 usc_loopback_frame( info );
6191 usc_set_sdlc_mode( info );
6193 if (info->bus_type == MGSL_BUS_TYPE_ISA) {
6194 /* Enable INTEN (Port 6, Bit12) */
6195 /* This connects the IRQ request signal to the ISA bus */
6196 usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT13) & ~BIT12));
6199 usc_enable_aux_clock(info, info->params.clock_speed);
6201 if (info->params.loopback)
6202 usc_enable_loopback(info,1);
6204 } /* end of mgsl_set_sync_mode() */
6206 /* usc_set_txidle() Set the HDLC idle mode for the transmitter.
6208 * Arguments: info pointer to device instance data
6209 * Return Value: None
6211 static void usc_set_txidle( struct mgsl_struct *info )
6213 u16 usc_idle_mode = IDLEMODE_FLAGS;
6215 /* Map API idle mode to USC register bits */
6217 switch( info->idle_mode ){
6218 case HDLC_TXIDLE_FLAGS: usc_idle_mode = IDLEMODE_FLAGS; break;
6219 case HDLC_TXIDLE_ALT_ZEROS_ONES: usc_idle_mode = IDLEMODE_ALT_ONE_ZERO; break;
6220 case HDLC_TXIDLE_ZEROS: usc_idle_mode = IDLEMODE_ZERO; break;
6221 case HDLC_TXIDLE_ONES: usc_idle_mode = IDLEMODE_ONE; break;
6222 case HDLC_TXIDLE_ALT_MARK_SPACE: usc_idle_mode = IDLEMODE_ALT_MARK_SPACE; break;
6223 case HDLC_TXIDLE_SPACE: usc_idle_mode = IDLEMODE_SPACE; break;
6224 case HDLC_TXIDLE_MARK: usc_idle_mode = IDLEMODE_MARK; break;
6227 info->usc_idle_mode = usc_idle_mode;
6228 //usc_OutReg(info, TCSR, usc_idle_mode);
6229 info->tcsr_value &= ~IDLEMODE_MASK; /* clear idle mode bits */
6230 info->tcsr_value += usc_idle_mode;
6231 usc_OutReg(info, TCSR, info->tcsr_value);
6234 * if SyncLink WAN adapter is running in external sync mode, the
6235 * transmitter has been set to Monosync in order to try to mimic
6236 * a true raw outbound bit stream. Monosync still sends an open/close
6237 * sync char at the start/end of a frame. Try to match those sync
6238 * patterns to the idle mode set here
6240 if ( info->params.mode == MGSL_MODE_RAW ) {
6241 unsigned char syncpat = 0;
6242 switch( info->idle_mode ) {
6243 case HDLC_TXIDLE_FLAGS:
6246 case HDLC_TXIDLE_ALT_ZEROS_ONES:
6249 case HDLC_TXIDLE_ZEROS:
6250 case HDLC_TXIDLE_SPACE:
6253 case HDLC_TXIDLE_ONES:
6254 case HDLC_TXIDLE_MARK:
6257 case HDLC_TXIDLE_ALT_MARK_SPACE:
6262 usc_SetTransmitSyncChars(info,syncpat,syncpat);
6265 } /* end of usc_set_txidle() */
6267 /* usc_get_serial_signals()
6269 * Query the adapter for the state of the V24 status (input) signals.
6271 * Arguments: info pointer to device instance data
6272 * Return Value: None
6274 static void usc_get_serial_signals( struct mgsl_struct *info )
6278 /* clear all serial signals except DTR and RTS */
6279 info->serial_signals &= SerialSignal_DTR + SerialSignal_RTS;
6281 /* Read the Misc Interrupt status Register (MISR) to get */
6282 /* the V24 status signals. */
6284 status = usc_InReg( info, MISR );
6286 /* set serial signal bits to reflect MISR */
6288 if ( status & MISCSTATUS_CTS )
6289 info->serial_signals |= SerialSignal_CTS;
6291 if ( status & MISCSTATUS_DCD )
6292 info->serial_signals |= SerialSignal_DCD;
6294 if ( status & MISCSTATUS_RI )
6295 info->serial_signals |= SerialSignal_RI;
6297 if ( status & MISCSTATUS_DSR )
6298 info->serial_signals |= SerialSignal_DSR;
6300 } /* end of usc_get_serial_signals() */
6302 /* usc_set_serial_signals()
6304 * Set the state of DTR and RTS based on contents of
6305 * serial_signals member of device extension.
6307 * Arguments: info pointer to device instance data
6308 * Return Value: None
6310 static void usc_set_serial_signals( struct mgsl_struct *info )
6313 unsigned char V24Out = info->serial_signals;
6315 /* get the current value of the Port Control Register (PCR) */
6317 Control = usc_InReg( info, PCR );
6319 if ( V24Out & SerialSignal_RTS )
6324 if ( V24Out & SerialSignal_DTR )
6329 usc_OutReg( info, PCR, Control );
6331 } /* end of usc_set_serial_signals() */
6333 /* usc_enable_async_clock()
6335 * Enable the async clock at the specified frequency.
6337 * Arguments: info pointer to device instance data
6338 * data_rate data rate of clock in bps
6339 * 0 disables the AUX clock.
6340 * Return Value: None
6342 static void usc_enable_async_clock( struct mgsl_struct *info, u32 data_rate )
6346 * Clock mode Control Register (CMCR)
6348 * <15..14> 00 counter 1 Disabled
6349 * <13..12> 00 counter 0 Disabled
6350 * <11..10> 11 BRG1 Input is TxC Pin
6351 * <9..8> 11 BRG0 Input is TxC Pin
6352 * <7..6> 01 DPLL Input is BRG1 Output
6353 * <5..3> 100 TxCLK comes from BRG0
6354 * <2..0> 100 RxCLK comes from BRG0
6356 * 0000 1111 0110 0100 = 0x0f64
6359 usc_OutReg( info, CMCR, 0x0f64 );
6363 * Write 16-bit Time Constant for BRG0
6364 * Time Constant = (ClkSpeed / data_rate) - 1
6365 * ClkSpeed = 921600 (ISA), 691200 (PCI)
6368 if ( info->bus_type == MGSL_BUS_TYPE_PCI )
6369 usc_OutReg( info, TC0R, (u16)((691200/data_rate) - 1) );
6371 usc_OutReg( info, TC0R, (u16)((921600/data_rate) - 1) );
6375 * Hardware Configuration Register (HCR)
6376 * Clear Bit 1, BRG0 mode = Continuous
6377 * Set Bit 0 to enable BRG0.
6380 usc_OutReg( info, HCR,
6381 (u16)((usc_InReg( info, HCR ) & ~BIT1) | BIT0) );
6384 /* Input/Output Control Reg, <2..0> = 100, Drive RxC pin with BRG0 */
6386 usc_OutReg( info, IOCR,
6387 (u16)((usc_InReg(info, IOCR) & 0xfff8) | 0x0004) );
6389 /* data rate == 0 so turn off BRG0 */
6390 usc_OutReg( info, HCR, (u16)(usc_InReg( info, HCR ) & ~BIT0) );
6393 } /* end of usc_enable_async_clock() */
6396 * Buffer Structures:
6398 * Normal memory access uses virtual addresses that can make discontiguous
6399 * physical memory pages appear to be contiguous in the virtual address
6400 * space (the processors memory mapping handles the conversions).
6402 * DMA transfers require physically contiguous memory. This is because
6403 * the DMA system controller and DMA bus masters deal with memory using
6404 * only physical addresses.
6406 * This causes a problem under Windows NT when large DMA buffers are
6407 * needed. Fragmentation of the nonpaged pool prevents allocations of
6408 * physically contiguous buffers larger than the PAGE_SIZE.
6410 * However the 16C32 supports Bus Master Scatter/Gather DMA which
6411 * allows DMA transfers to physically discontiguous buffers. Information
6412 * about each data transfer buffer is contained in a memory structure
6413 * called a 'buffer entry'. A list of buffer entries is maintained
6414 * to track and control the use of the data transfer buffers.
6416 * To support this strategy we will allocate sufficient PAGE_SIZE
6417 * contiguous memory buffers to allow for the total required buffer
6420 * The 16C32 accesses the list of buffer entries using Bus Master
6421 * DMA. Control information is read from the buffer entries by the
6422 * 16C32 to control data transfers. status information is written to
6423 * the buffer entries by the 16C32 to indicate the status of completed
6426 * The CPU writes control information to the buffer entries to control
6427 * the 16C32 and reads status information from the buffer entries to
6428 * determine information about received and transmitted frames.
6430 * Because the CPU and 16C32 (adapter) both need simultaneous access
6431 * to the buffer entries, the buffer entry memory is allocated with
6432 * HalAllocateCommonBuffer(). This restricts the size of the buffer
6433 * entry list to PAGE_SIZE.
6435 * The actual data buffers on the other hand will only be accessed
6436 * by the CPU or the adapter but not by both simultaneously. This allows
6437 * Scatter/Gather packet based DMA procedures for using physically
6438 * discontiguous pages.
6442 * mgsl_reset_tx_dma_buffers()
6444 * Set the count for all transmit buffers to 0 to indicate the
6445 * buffer is available for use and set the current buffer to the
6446 * first buffer. This effectively makes all buffers free and
6447 * discards any data in buffers.
6449 * Arguments: info pointer to device instance data
6450 * Return Value: None
6452 static void mgsl_reset_tx_dma_buffers( struct mgsl_struct *info )
6456 for ( i = 0; i < info->tx_buffer_count; i++ ) {
6457 *((unsigned long *)&(info->tx_buffer_list[i].count)) = 0;
6460 info->current_tx_buffer = 0;
6461 info->start_tx_dma_buffer = 0;
6462 info->tx_dma_buffers_used = 0;
6464 info->get_tx_holding_index = 0;
6465 info->put_tx_holding_index = 0;
6466 info->tx_holding_count = 0;
6468 } /* end of mgsl_reset_tx_dma_buffers() */
6471 * num_free_tx_dma_buffers()
6473 * returns the number of free tx dma buffers available
6475 * Arguments: info pointer to device instance data
6476 * Return Value: number of free tx dma buffers
6478 static int num_free_tx_dma_buffers(struct mgsl_struct *info)
6480 return info->tx_buffer_count - info->tx_dma_buffers_used;
6484 * mgsl_reset_rx_dma_buffers()
6486 * Set the count for all receive buffers to DMABUFFERSIZE
6487 * and set the current buffer to the first buffer. This effectively
6488 * makes all buffers free and discards any data in buffers.
6490 * Arguments: info pointer to device instance data
6491 * Return Value: None
6493 static void mgsl_reset_rx_dma_buffers( struct mgsl_struct *info )
6497 for ( i = 0; i < info->rx_buffer_count; i++ ) {
6498 *((unsigned long *)&(info->rx_buffer_list[i].count)) = DMABUFFERSIZE;
6499 // info->rx_buffer_list[i].count = DMABUFFERSIZE;
6500 // info->rx_buffer_list[i].status = 0;
6503 info->current_rx_buffer = 0;
6505 } /* end of mgsl_reset_rx_dma_buffers() */
6508 * mgsl_free_rx_frame_buffers()
6510 * Free the receive buffers used by a received SDLC
6511 * frame such that the buffers can be reused.
6515 * info pointer to device instance data
6516 * StartIndex index of 1st receive buffer of frame
6517 * EndIndex index of last receive buffer of frame
6519 * Return Value: None
6521 static void mgsl_free_rx_frame_buffers( struct mgsl_struct *info, unsigned int StartIndex, unsigned int EndIndex )
6524 DMABUFFERENTRY *pBufEntry;
6527 /* Starting with 1st buffer entry of the frame clear the status */
6528 /* field and set the count field to DMA Buffer Size. */
6533 pBufEntry = &(info->rx_buffer_list[Index]);
6535 if ( Index == EndIndex ) {
6536 /* This is the last buffer of the frame! */
6540 /* reset current buffer for reuse */
6541 // pBufEntry->status = 0;
6542 // pBufEntry->count = DMABUFFERSIZE;
6543 *((unsigned long *)&(pBufEntry->count)) = DMABUFFERSIZE;
6545 /* advance to next buffer entry in linked list */
6547 if ( Index == info->rx_buffer_count )
6551 /* set current buffer to next buffer after last buffer of frame */
6552 info->current_rx_buffer = Index;
6554 } /* end of free_rx_frame_buffers() */
6556 /* mgsl_get_rx_frame()
6558 * This function attempts to return a received SDLC frame from the
6559 * receive DMA buffers. Only frames received without errors are returned.
6561 * Arguments: info pointer to device extension
6562 * Return Value: 1 if frame returned, otherwise 0
6564 static int mgsl_get_rx_frame(struct mgsl_struct *info)
6566 unsigned int StartIndex, EndIndex; /* index of 1st and last buffers of Rx frame */
6567 unsigned short status;
6568 DMABUFFERENTRY *pBufEntry;
6569 unsigned int framesize = 0;
6571 unsigned long flags;
6572 struct tty_struct *tty = info->tty;
6573 int return_frame = 0;
6576 * current_rx_buffer points to the 1st buffer of the next available
6577 * receive frame. To find the last buffer of the frame look for
6578 * a non-zero status field in the buffer entries. (The status
6579 * field is set by the 16C32 after completing a receive frame.
6582 StartIndex = EndIndex = info->current_rx_buffer;
6584 while( !info->rx_buffer_list[EndIndex].status ) {
6586 * If the count field of the buffer entry is non-zero then
6587 * this buffer has not been used. (The 16C32 clears the count
6588 * field when it starts using the buffer.) If an unused buffer
6589 * is encountered then there are no frames available.
6592 if ( info->rx_buffer_list[EndIndex].count )
6595 /* advance to next buffer entry in linked list */
6597 if ( EndIndex == info->rx_buffer_count )
6600 /* if entire list searched then no frame available */
6601 if ( EndIndex == StartIndex ) {
6602 /* If this occurs then something bad happened,
6603 * all buffers have been 'used' but none mark
6604 * the end of a frame. Reset buffers and receiver.
6607 if ( info->rx_enabled ){
6608 spin_lock_irqsave(&info->irq_spinlock,flags);
6609 usc_start_receiver(info);
6610 spin_unlock_irqrestore(&info->irq_spinlock,flags);
6617 /* check status of receive frame */
6619 status = info->rx_buffer_list[EndIndex].status;
6621 if ( status & (RXSTATUS_SHORT_FRAME + RXSTATUS_OVERRUN +
6622 RXSTATUS_CRC_ERROR + RXSTATUS_ABORT) ) {
6623 if ( status & RXSTATUS_SHORT_FRAME )
6624 info->icount.rxshort++;
6625 else if ( status & RXSTATUS_ABORT )
6626 info->icount.rxabort++;
6627 else if ( status & RXSTATUS_OVERRUN )
6628 info->icount.rxover++;
6630 info->icount.rxcrc++;
6631 if ( info->params.crc_type & HDLC_CRC_RETURN_EX )
6635 #if SYNCLINK_GENERIC_HDLC
6637 struct net_device_stats *stats = hdlc_stats(info->netdev);
6639 stats->rx_frame_errors++;
6645 if ( return_frame ) {
6646 /* receive frame has no errors, get frame size.
6647 * The frame size is the starting value of the RCC (which was
6648 * set to 0xffff) minus the ending value of the RCC (decremented
6649 * once for each receive character) minus 2 for the 16-bit CRC.
6652 framesize = RCLRVALUE - info->rx_buffer_list[EndIndex].rcc;
6654 /* adjust frame size for CRC if any */
6655 if ( info->params.crc_type == HDLC_CRC_16_CCITT )
6657 else if ( info->params.crc_type == HDLC_CRC_32_CCITT )
6661 if ( debug_level >= DEBUG_LEVEL_BH )
6662 printk("%s(%d):mgsl_get_rx_frame(%s) status=%04X size=%d\n",
6663 __FILE__,__LINE__,info->device_name,status,framesize);
6665 if ( debug_level >= DEBUG_LEVEL_DATA )
6666 mgsl_trace_block(info,info->rx_buffer_list[StartIndex].virt_addr,
6667 min_t(int, framesize, DMABUFFERSIZE),0);
6670 if ( ( (info->params.crc_type & HDLC_CRC_RETURN_EX) &&
6671 ((framesize+1) > info->max_frame_size) ) ||
6672 (framesize > info->max_frame_size) )
6673 info->icount.rxlong++;
6675 /* copy dma buffer(s) to contiguous intermediate buffer */
6676 int copy_count = framesize;
6677 int index = StartIndex;
6678 unsigned char *ptmp = info->intermediate_rxbuffer;
6680 if ( !(status & RXSTATUS_CRC_ERROR))
6681 info->icount.rxok++;
6685 if ( copy_count > DMABUFFERSIZE )
6686 partial_count = DMABUFFERSIZE;
6688 partial_count = copy_count;
6690 pBufEntry = &(info->rx_buffer_list[index]);
6691 memcpy( ptmp, pBufEntry->virt_addr, partial_count );
6692 ptmp += partial_count;
6693 copy_count -= partial_count;
6695 if ( ++index == info->rx_buffer_count )
6699 if ( info->params.crc_type & HDLC_CRC_RETURN_EX ) {
6701 *ptmp = (status & RXSTATUS_CRC_ERROR ?
6705 if ( debug_level >= DEBUG_LEVEL_DATA )
6706 printk("%s(%d):mgsl_get_rx_frame(%s) rx frame status=%d\n",
6707 __FILE__,__LINE__,info->device_name,
6711 #if SYNCLINK_GENERIC_HDLC
6713 hdlcdev_rx(info,info->intermediate_rxbuffer,framesize);
6716 ldisc_receive_buf(tty, info->intermediate_rxbuffer, info->flag_buf, framesize);
6719 /* Free the buffers used by this frame. */
6720 mgsl_free_rx_frame_buffers( info, StartIndex, EndIndex );
6726 if ( info->rx_enabled && info->rx_overflow ) {
6727 /* The receiver needs to restarted because of
6728 * a receive overflow (buffer or FIFO). If the
6729 * receive buffers are now empty, then restart receiver.
6732 if ( !info->rx_buffer_list[EndIndex].status &&
6733 info->rx_buffer_list[EndIndex].count ) {
6734 spin_lock_irqsave(&info->irq_spinlock,flags);
6735 usc_start_receiver(info);
6736 spin_unlock_irqrestore(&info->irq_spinlock,flags);
6742 } /* end of mgsl_get_rx_frame() */
6744 /* mgsl_get_raw_rx_frame()
6746 * This function attempts to return a received frame from the
6747 * receive DMA buffers when running in external loop mode. In this mode,
6748 * we will return at most one DMABUFFERSIZE frame to the application.
6749 * The USC receiver is triggering off of DCD going active to start a new
6750 * frame, and DCD going inactive to terminate the frame (similar to
6751 * processing a closing flag character).
6753 * In this routine, we will return DMABUFFERSIZE "chunks" at a time.
6754 * If DCD goes inactive, the last Rx DMA Buffer will have a non-zero
6755 * status field and the RCC field will indicate the length of the
6756 * entire received frame. We take this RCC field and get the modulus
6757 * of RCC and DMABUFFERSIZE to determine if number of bytes in the
6758 * last Rx DMA buffer and return that last portion of the frame.
6760 * Arguments: info pointer to device extension
6761 * Return Value: 1 if frame returned, otherwise 0
6763 static int mgsl_get_raw_rx_frame(struct mgsl_struct *info)
6765 unsigned int CurrentIndex, NextIndex;
6766 unsigned short status;
6767 DMABUFFERENTRY *pBufEntry;
6768 unsigned int framesize = 0;
6770 unsigned long flags;
6771 struct tty_struct *tty = info->tty;
6774 * current_rx_buffer points to the 1st buffer of the next available
6775 * receive frame. The status field is set by the 16C32 after
6776 * completing a receive frame. If the status field of this buffer
6777 * is zero, either the USC is still filling this buffer or this
6778 * is one of a series of buffers making up a received frame.
6780 * If the count field of this buffer is zero, the USC is either
6781 * using this buffer or has used this buffer. Look at the count
6782 * field of the next buffer. If that next buffer's count is
6783 * non-zero, the USC is still actively using the current buffer.
6784 * Otherwise, if the next buffer's count field is zero, the
6785 * current buffer is complete and the USC is using the next
6788 CurrentIndex = NextIndex = info->current_rx_buffer;
6790 if ( NextIndex == info->rx_buffer_count )
6793 if ( info->rx_buffer_list[CurrentIndex].status != 0 ||
6794 (info->rx_buffer_list[CurrentIndex].count == 0 &&
6795 info->rx_buffer_list[NextIndex].count == 0)) {
6797 * Either the status field of this dma buffer is non-zero
6798 * (indicating the last buffer of a receive frame) or the next
6799 * buffer is marked as in use -- implying this buffer is complete
6800 * and an intermediate buffer for this received frame.
6803 status = info->rx_buffer_list[CurrentIndex].status;
6805 if ( status & (RXSTATUS_SHORT_FRAME + RXSTATUS_OVERRUN +
6806 RXSTATUS_CRC_ERROR + RXSTATUS_ABORT) ) {
6807 if ( status & RXSTATUS_SHORT_FRAME )
6808 info->icount.rxshort++;
6809 else if ( status & RXSTATUS_ABORT )
6810 info->icount.rxabort++;
6811 else if ( status & RXSTATUS_OVERRUN )
6812 info->icount.rxover++;
6814 info->icount.rxcrc++;
6818 * A receive frame is available, get frame size and status.
6820 * The frame size is the starting value of the RCC (which was
6821 * set to 0xffff) minus the ending value of the RCC (decremented
6822 * once for each receive character) minus 2 or 4 for the 16-bit
6825 * If the status field is zero, this is an intermediate buffer.
6828 * If the DMA Buffer Entry's Status field is non-zero, the
6829 * receive operation completed normally (ie: DCD dropped). The
6830 * RCC field is valid and holds the received frame size.
6831 * It is possible that the RCC field will be zero on a DMA buffer
6832 * entry with a non-zero status. This can occur if the total
6833 * frame size (number of bytes between the time DCD goes active
6834 * to the time DCD goes inactive) exceeds 65535 bytes. In this
6835 * case the 16C32 has underrun on the RCC count and appears to
6836 * stop updating this counter to let us know the actual received
6837 * frame size. If this happens (non-zero status and zero RCC),
6838 * simply return the entire RxDMA Buffer
6842 * In the event that the final RxDMA Buffer is
6843 * terminated with a non-zero status and the RCC
6844 * field is zero, we interpret this as the RCC
6845 * having underflowed (received frame > 65535 bytes).
6847 * Signal the event to the user by passing back
6848 * a status of RxStatus_CrcError returning the full
6849 * buffer and let the app figure out what data is
6852 if ( info->rx_buffer_list[CurrentIndex].rcc )
6853 framesize = RCLRVALUE - info->rx_buffer_list[CurrentIndex].rcc;
6855 framesize = DMABUFFERSIZE;
6858 framesize = DMABUFFERSIZE;
6861 if ( framesize > DMABUFFERSIZE ) {
6863 * if running in raw sync mode, ISR handler for
6864 * End Of Buffer events terminates all buffers at 4K.
6865 * If this frame size is said to be >4K, get the
6866 * actual number of bytes of the frame in this buffer.
6868 framesize = framesize % DMABUFFERSIZE;
6872 if ( debug_level >= DEBUG_LEVEL_BH )
6873 printk("%s(%d):mgsl_get_raw_rx_frame(%s) status=%04X size=%d\n",
6874 __FILE__,__LINE__,info->device_name,status,framesize);
6876 if ( debug_level >= DEBUG_LEVEL_DATA )
6877 mgsl_trace_block(info,info->rx_buffer_list[CurrentIndex].virt_addr,
6878 min_t(int, framesize, DMABUFFERSIZE),0);
6881 /* copy dma buffer(s) to contiguous intermediate buffer */
6882 /* NOTE: we never copy more than DMABUFFERSIZE bytes */
6884 pBufEntry = &(info->rx_buffer_list[CurrentIndex]);
6885 memcpy( info->intermediate_rxbuffer, pBufEntry->virt_addr, framesize);
6886 info->icount.rxok++;
6888 ldisc_receive_buf(tty, info->intermediate_rxbuffer, info->flag_buf, framesize);
6891 /* Free the buffers used by this frame. */
6892 mgsl_free_rx_frame_buffers( info, CurrentIndex, CurrentIndex );
6898 if ( info->rx_enabled && info->rx_overflow ) {
6899 /* The receiver needs to restarted because of
6900 * a receive overflow (buffer or FIFO). If the
6901 * receive buffers are now empty, then restart receiver.
6904 if ( !info->rx_buffer_list[CurrentIndex].status &&
6905 info->rx_buffer_list[CurrentIndex].count ) {
6906 spin_lock_irqsave(&info->irq_spinlock,flags);
6907 usc_start_receiver(info);
6908 spin_unlock_irqrestore(&info->irq_spinlock,flags);
6914 } /* end of mgsl_get_raw_rx_frame() */
6916 /* mgsl_load_tx_dma_buffer()
6918 * Load the transmit DMA buffer with the specified data.
6922 * info pointer to device extension
6923 * Buffer pointer to buffer containing frame to load
6924 * BufferSize size in bytes of frame in Buffer
6926 * Return Value: None
6928 static void mgsl_load_tx_dma_buffer(struct mgsl_struct *info,
6929 const char *Buffer, unsigned int BufferSize)
6931 unsigned short Copycount;
6933 DMABUFFERENTRY *pBufEntry;
6935 if ( debug_level >= DEBUG_LEVEL_DATA )
6936 mgsl_trace_block(info,Buffer, min_t(int, BufferSize, DMABUFFERSIZE), 1);
6938 if (info->params.flags & HDLC_FLAG_HDLC_LOOPMODE) {
6939 /* set CMR:13 to start transmit when
6940 * next GoAhead (abort) is received
6942 info->cmr_value |= BIT13;
6945 /* begin loading the frame in the next available tx dma
6946 * buffer, remember it's starting location for setting
6947 * up tx dma operation
6949 i = info->current_tx_buffer;
6950 info->start_tx_dma_buffer = i;
6952 /* Setup the status and RCC (Frame Size) fields of the 1st */
6953 /* buffer entry in the transmit DMA buffer list. */
6955 info->tx_buffer_list[i].status = info->cmr_value & 0xf000;
6956 info->tx_buffer_list[i].rcc = BufferSize;
6957 info->tx_buffer_list[i].count = BufferSize;
6959 /* Copy frame data from 1st source buffer to the DMA buffers. */
6960 /* The frame data may span multiple DMA buffers. */
6962 while( BufferSize ){
6963 /* Get a pointer to next DMA buffer entry. */
6964 pBufEntry = &info->tx_buffer_list[i++];
6966 if ( i == info->tx_buffer_count )
6969 /* Calculate the number of bytes that can be copied from */
6970 /* the source buffer to this DMA buffer. */
6971 if ( BufferSize > DMABUFFERSIZE )
6972 Copycount = DMABUFFERSIZE;
6974 Copycount = BufferSize;
6976 /* Actually copy data from source buffer to DMA buffer. */
6977 /* Also set the data count for this individual DMA buffer. */
6978 if ( info->bus_type == MGSL_BUS_TYPE_PCI )
6979 mgsl_load_pci_memory(pBufEntry->virt_addr, Buffer,Copycount);
6981 memcpy(pBufEntry->virt_addr, Buffer, Copycount);
6983 pBufEntry->count = Copycount;
6985 /* Advance source pointer and reduce remaining data count. */
6986 Buffer += Copycount;
6987 BufferSize -= Copycount;
6989 ++info->tx_dma_buffers_used;
6992 /* remember next available tx dma buffer */
6993 info->current_tx_buffer = i;
6995 } /* end of mgsl_load_tx_dma_buffer() */
6998 * mgsl_register_test()
7000 * Performs a register test of the 16C32.
7002 * Arguments: info pointer to device instance data
7003 * Return Value: TRUE if test passed, otherwise FALSE
7005 static BOOLEAN mgsl_register_test( struct mgsl_struct *info )
7007 static unsigned short BitPatterns[] =
7008 { 0x0000, 0xffff, 0xaaaa, 0x5555, 0x1234, 0x6969, 0x9696, 0x0f0f };
7009 static unsigned int Patterncount = ARRAY_SIZE(BitPatterns);
7012 unsigned long flags;
7014 spin_lock_irqsave(&info->irq_spinlock,flags);
7017 /* Verify the reset state of some registers. */
7019 if ( (usc_InReg( info, SICR ) != 0) ||
7020 (usc_InReg( info, IVR ) != 0) ||
7021 (usc_InDmaReg( info, DIVR ) != 0) ){
7026 /* Write bit patterns to various registers but do it out of */
7027 /* sync, then read back and verify values. */
7029 for ( i = 0 ; i < Patterncount ; i++ ) {
7030 usc_OutReg( info, TC0R, BitPatterns[i] );
7031 usc_OutReg( info, TC1R, BitPatterns[(i+1)%Patterncount] );
7032 usc_OutReg( info, TCLR, BitPatterns[(i+2)%Patterncount] );
7033 usc_OutReg( info, RCLR, BitPatterns[(i+3)%Patterncount] );
7034 usc_OutReg( info, RSR, BitPatterns[(i+4)%Patterncount] );
7035 usc_OutDmaReg( info, TBCR, BitPatterns[(i+5)%Patterncount] );
7037 if ( (usc_InReg( info, TC0R ) != BitPatterns[i]) ||
7038 (usc_InReg( info, TC1R ) != BitPatterns[(i+1)%Patterncount]) ||
7039 (usc_InReg( info, TCLR ) != BitPatterns[(i+2)%Patterncount]) ||
7040 (usc_InReg( info, RCLR ) != BitPatterns[(i+3)%Patterncount]) ||
7041 (usc_InReg( info, RSR ) != BitPatterns[(i+4)%Patterncount]) ||
7042 (usc_InDmaReg( info, TBCR ) != BitPatterns[(i+5)%Patterncount]) ){
7050 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7054 } /* end of mgsl_register_test() */
7056 /* mgsl_irq_test() Perform interrupt test of the 16C32.
7058 * Arguments: info pointer to device instance data
7059 * Return Value: TRUE if test passed, otherwise FALSE
7061 static BOOLEAN mgsl_irq_test( struct mgsl_struct *info )
7063 unsigned long EndTime;
7064 unsigned long flags;
7066 spin_lock_irqsave(&info->irq_spinlock,flags);
7070 * Setup 16C32 to interrupt on TxC pin (14MHz clock) transition.
7071 * The ISR sets irq_occurred to 1.
7074 info->irq_occurred = FALSE;
7076 /* Enable INTEN gate for ISA adapter (Port 6, Bit12) */
7077 /* Enable INTEN (Port 6, Bit12) */
7078 /* This connects the IRQ request signal to the ISA bus */
7079 /* on the ISA adapter. This has no effect for the PCI adapter */
7080 usc_OutReg( info, PCR, (unsigned short)((usc_InReg(info, PCR) | BIT13) & ~BIT12) );
7082 usc_EnableMasterIrqBit(info);
7083 usc_EnableInterrupts(info, IO_PIN);
7084 usc_ClearIrqPendingBits(info, IO_PIN);
7086 usc_UnlatchIostatusBits(info, MISCSTATUS_TXC_LATCHED);
7087 usc_EnableStatusIrqs(info, SICR_TXC_ACTIVE + SICR_TXC_INACTIVE);
7089 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7092 while( EndTime-- && !info->irq_occurred ) {
7093 msleep_interruptible(10);
7096 spin_lock_irqsave(&info->irq_spinlock,flags);
7098 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7100 if ( !info->irq_occurred )
7105 } /* end of mgsl_irq_test() */
7109 * Perform a DMA test of the 16C32. A small frame is
7110 * transmitted via DMA from a transmit buffer to a receive buffer
7111 * using single buffer DMA mode.
7113 * Arguments: info pointer to device instance data
7114 * Return Value: TRUE if test passed, otherwise FALSE
7116 static BOOLEAN mgsl_dma_test( struct mgsl_struct *info )
7118 unsigned short FifoLevel;
7119 unsigned long phys_addr;
7120 unsigned int FrameSize;
7124 unsigned short status=0;
7125 unsigned long EndTime;
7126 unsigned long flags;
7127 MGSL_PARAMS tmp_params;
7129 /* save current port options */
7130 memcpy(&tmp_params,&info->params,sizeof(MGSL_PARAMS));
7131 /* load default port options */
7132 memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS));
7134 #define TESTFRAMESIZE 40
7136 spin_lock_irqsave(&info->irq_spinlock,flags);
7138 /* setup 16C32 for SDLC DMA transfer mode */
7141 usc_set_sdlc_mode(info);
7142 usc_enable_loopback(info,1);
7144 /* Reprogram the RDMR so that the 16C32 does NOT clear the count
7145 * field of the buffer entry after fetching buffer address. This
7146 * way we can detect a DMA failure for a DMA read (which should be
7147 * non-destructive to system memory) before we try and write to
7148 * memory (where a failure could corrupt system memory).
7151 /* Receive DMA mode Register (RDMR)
7153 * <15..14> 11 DMA mode = Linked List Buffer mode
7154 * <13> 1 RSBinA/L = store Rx status Block in List entry
7155 * <12> 0 1 = Clear count of List Entry after fetching
7156 * <11..10> 00 Address mode = Increment
7157 * <9> 1 Terminate Buffer on RxBound
7158 * <8> 0 Bus Width = 16bits
7159 * <7..0> ? status Bits (write as 0s)
7161 * 1110 0010 0000 0000 = 0xe200
7164 usc_OutDmaReg( info, RDMR, 0xe200 );
7166 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7169 /* SETUP TRANSMIT AND RECEIVE DMA BUFFERS */
7171 FrameSize = TESTFRAMESIZE;
7173 /* setup 1st transmit buffer entry: */
7174 /* with frame size and transmit control word */
7176 info->tx_buffer_list[0].count = FrameSize;
7177 info->tx_buffer_list[0].rcc = FrameSize;
7178 info->tx_buffer_list[0].status = 0x4000;
7180 /* build a transmit frame in 1st transmit DMA buffer */
7182 TmpPtr = info->tx_buffer_list[0].virt_addr;
7183 for (i = 0; i < FrameSize; i++ )
7186 /* setup 1st receive buffer entry: */
7187 /* clear status, set max receive buffer size */
7189 info->rx_buffer_list[0].status = 0;
7190 info->rx_buffer_list[0].count = FrameSize + 4;
7192 /* zero out the 1st receive buffer */
7194 memset( info->rx_buffer_list[0].virt_addr, 0, FrameSize + 4 );
7196 /* Set count field of next buffer entries to prevent */
7197 /* 16C32 from using buffers after the 1st one. */
7199 info->tx_buffer_list[1].count = 0;
7200 info->rx_buffer_list[1].count = 0;
7203 /***************************/
7204 /* Program 16C32 receiver. */
7205 /***************************/
7207 spin_lock_irqsave(&info->irq_spinlock,flags);
7209 /* setup DMA transfers */
7210 usc_RTCmd( info, RTCmd_PurgeRxFifo );
7212 /* program 16C32 receiver with physical address of 1st DMA buffer entry */
7213 phys_addr = info->rx_buffer_list[0].phys_entry;
7214 usc_OutDmaReg( info, NRARL, (unsigned short)phys_addr );
7215 usc_OutDmaReg( info, NRARU, (unsigned short)(phys_addr >> 16) );
7217 /* Clear the Rx DMA status bits (read RDMR) and start channel */
7218 usc_InDmaReg( info, RDMR );
7219 usc_DmaCmd( info, DmaCmd_InitRxChannel );
7221 /* Enable Receiver (RMR <1..0> = 10) */
7222 usc_OutReg( info, RMR, (unsigned short)((usc_InReg(info, RMR) & 0xfffc) | 0x0002) );
7224 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7227 /*************************************************************/
7228 /* WAIT FOR RECEIVER TO DMA ALL PARAMETERS FROM BUFFER ENTRY */
7229 /*************************************************************/
7231 /* Wait 100ms for interrupt. */
7232 EndTime = jiffies + msecs_to_jiffies(100);
7235 if (time_after(jiffies, EndTime)) {
7240 spin_lock_irqsave(&info->irq_spinlock,flags);
7241 status = usc_InDmaReg( info, RDMR );
7242 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7244 if ( !(status & BIT4) && (status & BIT5) ) {
7245 /* INITG (BIT 4) is inactive (no entry read in progress) AND */
7246 /* BUSY (BIT 5) is active (channel still active). */
7247 /* This means the buffer entry read has completed. */
7253 /******************************/
7254 /* Program 16C32 transmitter. */
7255 /******************************/
7257 spin_lock_irqsave(&info->irq_spinlock,flags);
7259 /* Program the Transmit Character Length Register (TCLR) */
7260 /* and clear FIFO (TCC is loaded with TCLR on FIFO clear) */
7262 usc_OutReg( info, TCLR, (unsigned short)info->tx_buffer_list[0].count );
7263 usc_RTCmd( info, RTCmd_PurgeTxFifo );
7265 /* Program the address of the 1st DMA Buffer Entry in linked list */
7267 phys_addr = info->tx_buffer_list[0].phys_entry;
7268 usc_OutDmaReg( info, NTARL, (unsigned short)phys_addr );
7269 usc_OutDmaReg( info, NTARU, (unsigned short)(phys_addr >> 16) );
7271 /* unlatch Tx status bits, and start transmit channel. */
7273 usc_OutReg( info, TCSR, (unsigned short)(( usc_InReg(info, TCSR) & 0x0f00) | 0xfa) );
7274 usc_DmaCmd( info, DmaCmd_InitTxChannel );
7276 /* wait for DMA controller to fill transmit FIFO */
7278 usc_TCmd( info, TCmd_SelectTicrTxFifostatus );
7280 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7283 /**********************************/
7284 /* WAIT FOR TRANSMIT FIFO TO FILL */
7285 /**********************************/
7288 EndTime = jiffies + msecs_to_jiffies(100);
7291 if (time_after(jiffies, EndTime)) {
7296 spin_lock_irqsave(&info->irq_spinlock,flags);
7297 FifoLevel = usc_InReg(info, TICR) >> 8;
7298 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7300 if ( FifoLevel < 16 )
7303 if ( FrameSize < 32 ) {
7304 /* This frame is smaller than the entire transmit FIFO */
7305 /* so wait for the entire frame to be loaded. */
7306 if ( FifoLevel <= (32 - FrameSize) )
7314 /* Enable 16C32 transmitter. */
7316 spin_lock_irqsave(&info->irq_spinlock,flags);
7318 /* Transmit mode Register (TMR), <1..0> = 10, Enable Transmitter */
7319 usc_TCmd( info, TCmd_SendFrame );
7320 usc_OutReg( info, TMR, (unsigned short)((usc_InReg(info, TMR) & 0xfffc) | 0x0002) );
7322 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7325 /******************************/
7326 /* WAIT FOR TRANSMIT COMPLETE */
7327 /******************************/
7330 EndTime = jiffies + msecs_to_jiffies(100);
7332 /* While timer not expired wait for transmit complete */
7334 spin_lock_irqsave(&info->irq_spinlock,flags);
7335 status = usc_InReg( info, TCSR );
7336 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7338 while ( !(status & (BIT6+BIT5+BIT4+BIT2+BIT1)) ) {
7339 if (time_after(jiffies, EndTime)) {
7344 spin_lock_irqsave(&info->irq_spinlock,flags);
7345 status = usc_InReg( info, TCSR );
7346 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7352 /* CHECK FOR TRANSMIT ERRORS */
7353 if ( status & (BIT5 + BIT1) )
7358 /* WAIT FOR RECEIVE COMPLETE */
7361 EndTime = jiffies + msecs_to_jiffies(100);
7363 /* Wait for 16C32 to write receive status to buffer entry. */
7364 status=info->rx_buffer_list[0].status;
7365 while ( status == 0 ) {
7366 if (time_after(jiffies, EndTime)) {
7370 status=info->rx_buffer_list[0].status;
7376 /* CHECK FOR RECEIVE ERRORS */
7377 status = info->rx_buffer_list[0].status;
7379 if ( status & (BIT8 + BIT3 + BIT1) ) {
7380 /* receive error has occurred */
7383 if ( memcmp( info->tx_buffer_list[0].virt_addr ,
7384 info->rx_buffer_list[0].virt_addr, FrameSize ) ){
7390 spin_lock_irqsave(&info->irq_spinlock,flags);
7392 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7394 /* restore current port options */
7395 memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS));
7399 } /* end of mgsl_dma_test() */
7401 /* mgsl_adapter_test()
7403 * Perform the register, IRQ, and DMA tests for the 16C32.
7405 * Arguments: info pointer to device instance data
7406 * Return Value: 0 if success, otherwise -ENODEV
7408 static int mgsl_adapter_test( struct mgsl_struct *info )
7410 if ( debug_level >= DEBUG_LEVEL_INFO )
7411 printk( "%s(%d):Testing device %s\n",
7412 __FILE__,__LINE__,info->device_name );
7414 if ( !mgsl_register_test( info ) ) {
7415 info->init_error = DiagStatus_AddressFailure;
7416 printk( "%s(%d):Register test failure for device %s Addr=%04X\n",
7417 __FILE__,__LINE__,info->device_name, (unsigned short)(info->io_base) );
7421 if ( !mgsl_irq_test( info ) ) {
7422 info->init_error = DiagStatus_IrqFailure;
7423 printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n",
7424 __FILE__,__LINE__,info->device_name, (unsigned short)(info->irq_level) );
7428 if ( !mgsl_dma_test( info ) ) {
7429 info->init_error = DiagStatus_DmaFailure;
7430 printk( "%s(%d):DMA test failure for device %s DMA=%d\n",
7431 __FILE__,__LINE__,info->device_name, (unsigned short)(info->dma_level) );
7435 if ( debug_level >= DEBUG_LEVEL_INFO )
7436 printk( "%s(%d):device %s passed diagnostics\n",
7437 __FILE__,__LINE__,info->device_name );
7441 } /* end of mgsl_adapter_test() */
7443 /* mgsl_memory_test()
7445 * Test the shared memory on a PCI adapter.
7447 * Arguments: info pointer to device instance data
7448 * Return Value: TRUE if test passed, otherwise FALSE
7450 static BOOLEAN mgsl_memory_test( struct mgsl_struct *info )
7452 static unsigned long BitPatterns[] =
7453 { 0x0, 0x55555555, 0xaaaaaaaa, 0x66666666, 0x99999999, 0xffffffff, 0x12345678 };
7454 unsigned long Patterncount = ARRAY_SIZE(BitPatterns);
7456 unsigned long TestLimit = SHARED_MEM_ADDRESS_SIZE/sizeof(unsigned long);
7457 unsigned long * TestAddr;
7459 if ( info->bus_type != MGSL_BUS_TYPE_PCI )
7462 TestAddr = (unsigned long *)info->memory_base;
7464 /* Test data lines with test pattern at one location. */
7466 for ( i = 0 ; i < Patterncount ; i++ ) {
7467 *TestAddr = BitPatterns[i];
7468 if ( *TestAddr != BitPatterns[i] )
7472 /* Test address lines with incrementing pattern over */
7473 /* entire address range. */
7475 for ( i = 0 ; i < TestLimit ; i++ ) {
7480 TestAddr = (unsigned long *)info->memory_base;
7482 for ( i = 0 ; i < TestLimit ; i++ ) {
7483 if ( *TestAddr != i * 4 )
7488 memset( info->memory_base, 0, SHARED_MEM_ADDRESS_SIZE );
7492 } /* End Of mgsl_memory_test() */
7495 /* mgsl_load_pci_memory()
7497 * Load a large block of data into the PCI shared memory.
7498 * Use this instead of memcpy() or memmove() to move data
7499 * into the PCI shared memory.
7503 * This function prevents the PCI9050 interface chip from hogging
7504 * the adapter local bus, which can starve the 16C32 by preventing
7505 * 16C32 bus master cycles.
7507 * The PCI9050 documentation says that the 9050 will always release
7508 * control of the local bus after completing the current read
7509 * or write operation.
7511 * It appears that as long as the PCI9050 write FIFO is full, the
7512 * PCI9050 treats all of the writes as a single burst transaction
7513 * and will not release the bus. This causes DMA latency problems
7514 * at high speeds when copying large data blocks to the shared
7517 * This function in effect, breaks the a large shared memory write
7518 * into multiple transations by interleaving a shared memory read
7519 * which will flush the write FIFO and 'complete' the write
7520 * transation. This allows any pending DMA request to gain control
7521 * of the local bus in a timely fasion.
7525 * TargetPtr pointer to target address in PCI shared memory
7526 * SourcePtr pointer to source buffer for data
7527 * count count in bytes of data to copy
7529 * Return Value: None
7531 static void mgsl_load_pci_memory( char* TargetPtr, const char* SourcePtr,
7532 unsigned short count )
7534 /* 16 32-bit writes @ 60ns each = 960ns max latency on local bus */
7535 #define PCI_LOAD_INTERVAL 64
7537 unsigned short Intervalcount = count / PCI_LOAD_INTERVAL;
7538 unsigned short Index;
7539 unsigned long Dummy;
7541 for ( Index = 0 ; Index < Intervalcount ; Index++ )
7543 memcpy(TargetPtr, SourcePtr, PCI_LOAD_INTERVAL);
7544 Dummy = *((volatile unsigned long *)TargetPtr);
7545 TargetPtr += PCI_LOAD_INTERVAL;
7546 SourcePtr += PCI_LOAD_INTERVAL;
7549 memcpy( TargetPtr, SourcePtr, count % PCI_LOAD_INTERVAL );
7551 } /* End Of mgsl_load_pci_memory() */
7553 static void mgsl_trace_block(struct mgsl_struct *info,const char* data, int count, int xmit)
7558 printk("%s tx data:\n",info->device_name);
7560 printk("%s rx data:\n",info->device_name);
7568 for(i=0;i<linecount;i++)
7569 printk("%02X ",(unsigned char)data[i]);
7572 for(i=0;i<linecount;i++) {
7573 if (data[i]>=040 && data[i]<=0176)
7574 printk("%c",data[i]);
7583 } /* end of mgsl_trace_block() */
7585 /* mgsl_tx_timeout()
7587 * called when HDLC frame times out
7588 * update stats and do tx completion processing
7590 * Arguments: context pointer to device instance data
7591 * Return Value: None
7593 static void mgsl_tx_timeout(unsigned long context)
7595 struct mgsl_struct *info = (struct mgsl_struct*)context;
7596 unsigned long flags;
7598 if ( debug_level >= DEBUG_LEVEL_INFO )
7599 printk( "%s(%d):mgsl_tx_timeout(%s)\n",
7600 __FILE__,__LINE__,info->device_name);
7601 if(info->tx_active &&
7602 (info->params.mode == MGSL_MODE_HDLC ||
7603 info->params.mode == MGSL_MODE_RAW) ) {
7604 info->icount.txtimeout++;
7606 spin_lock_irqsave(&info->irq_spinlock,flags);
7607 info->tx_active = 0;
7608 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
7610 if ( info->params.flags & HDLC_FLAG_HDLC_LOOPMODE )
7611 usc_loopmode_cancel_transmit( info );
7613 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7615 #if SYNCLINK_GENERIC_HDLC
7617 hdlcdev_tx_done(info);
7620 mgsl_bh_transmit(info);
7622 } /* end of mgsl_tx_timeout() */
7624 /* signal that there are no more frames to send, so that
7625 * line is 'released' by echoing RxD to TxD when current
7626 * transmission is complete (or immediately if no tx in progress).
7628 static int mgsl_loopmode_send_done( struct mgsl_struct * info )
7630 unsigned long flags;
7632 spin_lock_irqsave(&info->irq_spinlock,flags);
7633 if (info->params.flags & HDLC_FLAG_HDLC_LOOPMODE) {
7634 if (info->tx_active)
7635 info->loopmode_send_done_requested = TRUE;
7637 usc_loopmode_send_done(info);
7639 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7644 /* release the line by echoing RxD to TxD
7645 * upon completion of a transmit frame
7647 static void usc_loopmode_send_done( struct mgsl_struct * info )
7649 info->loopmode_send_done_requested = FALSE;
7650 /* clear CMR:13 to 0 to start echoing RxData to TxData */
7651 info->cmr_value &= ~BIT13;
7652 usc_OutReg(info, CMR, info->cmr_value);
7655 /* abort a transmit in progress while in HDLC LoopMode
7657 static void usc_loopmode_cancel_transmit( struct mgsl_struct * info )
7659 /* reset tx dma channel and purge TxFifo */
7660 usc_RTCmd( info, RTCmd_PurgeTxFifo );
7661 usc_DmaCmd( info, DmaCmd_ResetTxChannel );
7662 usc_loopmode_send_done( info );
7665 /* for HDLC/SDLC LoopMode, setting CMR:13 after the transmitter is enabled
7666 * is an Insert Into Loop action. Upon receipt of a GoAhead sequence (RxAbort)
7667 * we must clear CMR:13 to begin repeating TxData to RxData
7669 static void usc_loopmode_insert_request( struct mgsl_struct * info )
7671 info->loopmode_insert_requested = TRUE;
7673 /* enable RxAbort irq. On next RxAbort, clear CMR:13 to
7674 * begin repeating TxData on RxData (complete insertion)
7676 usc_OutReg( info, RICR,
7677 (usc_InReg( info, RICR ) | RXSTATUS_ABORT_RECEIVED ) );
7679 /* set CMR:13 to insert into loop on next GoAhead (RxAbort) */
7680 info->cmr_value |= BIT13;
7681 usc_OutReg(info, CMR, info->cmr_value);
7684 /* return 1 if station is inserted into the loop, otherwise 0
7686 static int usc_loopmode_active( struct mgsl_struct * info)
7688 return usc_InReg( info, CCSR ) & BIT7 ? 1 : 0 ;
7691 #if SYNCLINK_GENERIC_HDLC
7694 * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
7695 * set encoding and frame check sequence (FCS) options
7697 * dev pointer to network device structure
7698 * encoding serial encoding setting
7699 * parity FCS setting
7701 * returns 0 if success, otherwise error code
7703 static int hdlcdev_attach(struct net_device *dev, unsigned short encoding,
7704 unsigned short parity)
7706 struct mgsl_struct *info = dev_to_port(dev);
7707 unsigned char new_encoding;
7708 unsigned short new_crctype;
7710 /* return error if TTY interface open */
7716 case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break;
7717 case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break;
7718 case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break;
7719 case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break;
7720 case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break;
7721 default: return -EINVAL;
7726 case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break;
7727 case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break;
7728 case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break;
7729 default: return -EINVAL;
7732 info->params.encoding = new_encoding;
7733 info->params.crc_type = new_crctype;
7735 /* if network interface up, reprogram hardware */
7737 mgsl_program_hw(info);
7743 * called by generic HDLC layer to send frame
7745 * skb socket buffer containing HDLC frame
7746 * dev pointer to network device structure
7748 * returns 0 if success, otherwise error code
7750 static int hdlcdev_xmit(struct sk_buff *skb, struct net_device *dev)
7752 struct mgsl_struct *info = dev_to_port(dev);
7753 struct net_device_stats *stats = hdlc_stats(dev);
7754 unsigned long flags;
7756 if (debug_level >= DEBUG_LEVEL_INFO)
7757 printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name);
7759 /* stop sending until this frame completes */
7760 netif_stop_queue(dev);
7762 /* copy data to device buffers */
7763 info->xmit_cnt = skb->len;
7764 mgsl_load_tx_dma_buffer(info, skb->data, skb->len);
7766 /* update network statistics */
7767 stats->tx_packets++;
7768 stats->tx_bytes += skb->len;
7770 /* done with socket buffer, so free it */
7773 /* save start time for transmit timeout detection */
7774 dev->trans_start = jiffies;
7776 /* start hardware transmitter if necessary */
7777 spin_lock_irqsave(&info->irq_spinlock,flags);
7778 if (!info->tx_active)
7779 usc_start_transmitter(info);
7780 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7786 * called by network layer when interface enabled
7787 * claim resources and initialize hardware
7789 * dev pointer to network device structure
7791 * returns 0 if success, otherwise error code
7793 static int hdlcdev_open(struct net_device *dev)
7795 struct mgsl_struct *info = dev_to_port(dev);
7797 unsigned long flags;
7799 if (debug_level >= DEBUG_LEVEL_INFO)
7800 printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name);
7802 /* generic HDLC layer open processing */
7803 if ((rc = hdlc_open(dev)))
7806 /* arbitrate between network and tty opens */
7807 spin_lock_irqsave(&info->netlock, flags);
7808 if (info->count != 0 || info->netcount != 0) {
7809 printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name);
7810 spin_unlock_irqrestore(&info->netlock, flags);
7814 spin_unlock_irqrestore(&info->netlock, flags);
7816 /* claim resources and init adapter */
7817 if ((rc = startup(info)) != 0) {
7818 spin_lock_irqsave(&info->netlock, flags);
7820 spin_unlock_irqrestore(&info->netlock, flags);
7824 /* assert DTR and RTS, apply hardware settings */
7825 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
7826 mgsl_program_hw(info);
7828 /* enable network layer transmit */
7829 dev->trans_start = jiffies;
7830 netif_start_queue(dev);
7832 /* inform generic HDLC layer of current DCD status */
7833 spin_lock_irqsave(&info->irq_spinlock, flags);
7834 usc_get_serial_signals(info);
7835 spin_unlock_irqrestore(&info->irq_spinlock, flags);
7836 if (info->serial_signals & SerialSignal_DCD)
7837 netif_carrier_on(dev);
7839 netif_carrier_off(dev);
7844 * called by network layer when interface is disabled
7845 * shutdown hardware and release resources
7847 * dev pointer to network device structure
7849 * returns 0 if success, otherwise error code
7851 static int hdlcdev_close(struct net_device *dev)
7853 struct mgsl_struct *info = dev_to_port(dev);
7854 unsigned long flags;
7856 if (debug_level >= DEBUG_LEVEL_INFO)
7857 printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name);
7859 netif_stop_queue(dev);
7861 /* shutdown adapter and release resources */
7866 spin_lock_irqsave(&info->netlock, flags);
7868 spin_unlock_irqrestore(&info->netlock, flags);
7874 * called by network layer to process IOCTL call to network device
7876 * dev pointer to network device structure
7877 * ifr pointer to network interface request structure
7878 * cmd IOCTL command code
7880 * returns 0 if success, otherwise error code
7882 static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
7884 const size_t size = sizeof(sync_serial_settings);
7885 sync_serial_settings new_line;
7886 sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync;
7887 struct mgsl_struct *info = dev_to_port(dev);
7890 if (debug_level >= DEBUG_LEVEL_INFO)
7891 printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name);
7893 /* return error if TTY interface open */
7897 if (cmd != SIOCWANDEV)
7898 return hdlc_ioctl(dev, ifr, cmd);
7900 switch(ifr->ifr_settings.type) {
7901 case IF_GET_IFACE: /* return current sync_serial_settings */
7903 ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL;
7904 if (ifr->ifr_settings.size < size) {
7905 ifr->ifr_settings.size = size; /* data size wanted */
7909 flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
7910 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
7911 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
7912 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
7915 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break;
7916 case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break;
7917 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break;
7918 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break;
7919 default: new_line.clock_type = CLOCK_DEFAULT;
7922 new_line.clock_rate = info->params.clock_speed;
7923 new_line.loopback = info->params.loopback ? 1:0;
7925 if (copy_to_user(line, &new_line, size))
7929 case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */
7931 if(!capable(CAP_NET_ADMIN))
7933 if (copy_from_user(&new_line, line, size))
7936 switch (new_line.clock_type)
7938 case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break;
7939 case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break;
7940 case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break;
7941 case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break;
7942 case CLOCK_DEFAULT: flags = info->params.flags &
7943 (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
7944 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
7945 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
7946 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break;
7947 default: return -EINVAL;
7950 if (new_line.loopback != 0 && new_line.loopback != 1)
7953 info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
7954 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
7955 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
7956 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
7957 info->params.flags |= flags;
7959 info->params.loopback = new_line.loopback;
7961 if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG))
7962 info->params.clock_speed = new_line.clock_rate;
7964 info->params.clock_speed = 0;
7966 /* if network interface up, reprogram hardware */
7968 mgsl_program_hw(info);
7972 return hdlc_ioctl(dev, ifr, cmd);
7977 * called by network layer when transmit timeout is detected
7979 * dev pointer to network device structure
7981 static void hdlcdev_tx_timeout(struct net_device *dev)
7983 struct mgsl_struct *info = dev_to_port(dev);
7984 struct net_device_stats *stats = hdlc_stats(dev);
7985 unsigned long flags;
7987 if (debug_level >= DEBUG_LEVEL_INFO)
7988 printk("hdlcdev_tx_timeout(%s)\n",dev->name);
7991 stats->tx_aborted_errors++;
7993 spin_lock_irqsave(&info->irq_spinlock,flags);
7994 usc_stop_transmitter(info);
7995 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7997 netif_wake_queue(dev);
8001 * called by device driver when transmit completes
8002 * reenable network layer transmit if stopped
8004 * info pointer to device instance information
8006 static void hdlcdev_tx_done(struct mgsl_struct *info)
8008 if (netif_queue_stopped(info->netdev))
8009 netif_wake_queue(info->netdev);
8013 * called by device driver when frame received
8014 * pass frame to network layer
8016 * info pointer to device instance information
8017 * buf pointer to buffer contianing frame data
8018 * size count of data bytes in buf
8020 static void hdlcdev_rx(struct mgsl_struct *info, char *buf, int size)
8022 struct sk_buff *skb = dev_alloc_skb(size);
8023 struct net_device *dev = info->netdev;
8024 struct net_device_stats *stats = hdlc_stats(dev);
8026 if (debug_level >= DEBUG_LEVEL_INFO)
8027 printk("hdlcdev_rx(%s)\n",dev->name);
8030 printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n", dev->name);
8031 stats->rx_dropped++;
8035 memcpy(skb_put(skb, size),buf,size);
8037 skb->protocol = hdlc_type_trans(skb, info->netdev);
8039 stats->rx_packets++;
8040 stats->rx_bytes += size;
8044 info->netdev->last_rx = jiffies;
8048 * called by device driver when adding device instance
8049 * do generic HDLC initialization
8051 * info pointer to device instance information
8053 * returns 0 if success, otherwise error code
8055 static int hdlcdev_init(struct mgsl_struct *info)
8058 struct net_device *dev;
8061 /* allocate and initialize network and HDLC layer objects */
8063 if (!(dev = alloc_hdlcdev(info))) {
8064 printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__);
8068 /* for network layer reporting purposes only */
8069 dev->base_addr = info->io_base;
8070 dev->irq = info->irq_level;
8071 dev->dma = info->dma_level;
8073 /* network layer callbacks and settings */
8074 dev->do_ioctl = hdlcdev_ioctl;
8075 dev->open = hdlcdev_open;
8076 dev->stop = hdlcdev_close;
8077 dev->tx_timeout = hdlcdev_tx_timeout;
8078 dev->watchdog_timeo = 10*HZ;
8079 dev->tx_queue_len = 50;
8081 /* generic HDLC layer callbacks and settings */
8082 hdlc = dev_to_hdlc(dev);
8083 hdlc->attach = hdlcdev_attach;
8084 hdlc->xmit = hdlcdev_xmit;
8086 /* register objects with HDLC layer */
8087 if ((rc = register_hdlc_device(dev))) {
8088 printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__);
8098 * called by device driver when removing device instance
8099 * do generic HDLC cleanup
8101 * info pointer to device instance information
8103 static void hdlcdev_exit(struct mgsl_struct *info)
8105 unregister_hdlc_device(info->netdev);
8106 free_netdev(info->netdev);
8107 info->netdev = NULL;
8110 #endif /* CONFIG_HDLC */
8113 static int __devinit synclink_init_one (struct pci_dev *dev,
8114 const struct pci_device_id *ent)
8116 struct mgsl_struct *info;
8118 if (pci_enable_device(dev)) {
8119 printk("error enabling pci device %p\n", dev);
8123 if (!(info = mgsl_allocate_device())) {
8124 printk("can't allocate device instance data.\n");
8128 /* Copy user configuration info to device instance data */
8130 info->io_base = pci_resource_start(dev, 2);
8131 info->irq_level = dev->irq;
8132 info->phys_memory_base = pci_resource_start(dev, 3);
8134 /* Because veremap only works on page boundaries we must map
8135 * a larger area than is actually implemented for the LCR
8136 * memory range. We map a full page starting at the page boundary.
8138 info->phys_lcr_base = pci_resource_start(dev, 0);
8139 info->lcr_offset = info->phys_lcr_base & (PAGE_SIZE-1);
8140 info->phys_lcr_base &= ~(PAGE_SIZE-1);
8142 info->bus_type = MGSL_BUS_TYPE_PCI;
8143 info->io_addr_size = 8;
8144 info->irq_flags = IRQF_SHARED;
8146 if (dev->device == 0x0210) {
8147 /* Version 1 PCI9030 based universal PCI adapter */
8148 info->misc_ctrl_value = 0x007c4080;
8149 info->hw_version = 1;
8151 /* Version 0 PCI9050 based 5V PCI adapter
8152 * A PCI9050 bug prevents reading LCR registers if
8153 * LCR base address bit 7 is set. Maintain shadow
8154 * value so we can write to LCR misc control reg.
8156 info->misc_ctrl_value = 0x087e4546;
8157 info->hw_version = 0;
8160 mgsl_add_device(info);
8165 static void __devexit synclink_remove_one (struct pci_dev *dev)