2 * linux/drivers/char/pcmcia/synclink_cs.c
4 * $Id: synclink_cs.c,v 4.34 2005/09/08 13:20:54 paulkf Exp $
6 * Device driver for Microgate SyncLink PC Card
7 * multiprotocol serial adapter.
9 * written by Paul Fulghum for Microgate Corporation
10 * paulkf@microgate.com
12 * Microgate and SyncLink are trademarks of Microgate Corporation
14 * This code is released under the GNU General Public License (GPL)
16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
29 #define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq))
31 # define BREAKPOINT() asm(" int $3");
33 # define BREAKPOINT() { }
36 #define MAX_DEVICE_COUNT 4
38 #include <linux/module.h>
39 #include <linux/errno.h>
40 #include <linux/signal.h>
41 #include <linux/sched.h>
42 #include <linux/timer.h>
43 #include <linux/time.h>
44 #include <linux/interrupt.h>
45 #include <linux/pci.h>
46 #include <linux/tty.h>
47 #include <linux/tty_flip.h>
48 #include <linux/serial.h>
49 #include <linux/major.h>
50 #include <linux/string.h>
51 #include <linux/fcntl.h>
52 #include <linux/ptrace.h>
53 #include <linux/ioport.h>
55 #include <linux/slab.h>
56 #include <linux/netdevice.h>
57 #include <linux/vmalloc.h>
58 #include <linux/init.h>
59 #include <linux/delay.h>
60 #include <linux/ioctl.h>
62 #include <asm/system.h>
66 #include <linux/bitops.h>
67 #include <asm/types.h>
68 #include <linux/termios.h>
69 #include <linux/workqueue.h>
70 #include <linux/hdlc.h>
72 #include <pcmcia/cs_types.h>
73 #include <pcmcia/cs.h>
74 #include <pcmcia/cistpl.h>
75 #include <pcmcia/cisreg.h>
76 #include <pcmcia/ds.h>
78 #ifdef CONFIG_HDLC_MODULE
82 #define GET_USER(error,value,addr) error = get_user(value,addr)
83 #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0
84 #define PUT_USER(error,value,addr) error = put_user(value,addr)
85 #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0
87 #include <asm/uaccess.h>
89 #include "linux/synclink.h"
91 static MGSL_PARAMS default_params = {
92 MGSL_MODE_HDLC, /* unsigned long mode */
93 0, /* unsigned char loopback; */
94 HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */
95 HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */
96 0, /* unsigned long clock_speed; */
97 0xff, /* unsigned char addr_filter; */
98 HDLC_CRC_16_CCITT, /* unsigned short crc_type; */
99 HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */
100 HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */
101 9600, /* unsigned long data_rate; */
102 8, /* unsigned char data_bits; */
103 1, /* unsigned char stop_bits; */
104 ASYNC_PARITY_NONE /* unsigned char parity; */
110 unsigned char status;
114 /* The queue of BH actions to be performed */
117 #define BH_TRANSMIT 2
120 #define IO_PIN_SHUTDOWN_LIMIT 100
122 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
124 struct _input_signal_events {
137 * Device instance data structure
140 typedef struct _mgslpc_info {
141 void *if_ptr; /* General purpose pointer (used by SPPP) */
144 int count; /* count of opens */
146 unsigned short close_delay;
147 unsigned short closing_wait; /* time to wait before closing */
149 struct mgsl_icount icount;
151 struct tty_struct *tty;
153 int x_char; /* xon/xoff character */
154 int blocked_open; /* # of blocked opens */
155 unsigned char read_status_mask;
156 unsigned char ignore_status_mask;
158 unsigned char *tx_buf;
163 /* circular list of fixed length rx buffers */
165 unsigned char *rx_buf; /* memory allocated for all rx buffers */
166 int rx_buf_total_size; /* size of memory allocated for rx buffers */
167 int rx_put; /* index of next empty rx buffer */
168 int rx_get; /* index of next full rx buffer */
169 int rx_buf_size; /* size in bytes of single rx buffer */
170 int rx_buf_count; /* total number of rx buffers */
171 int rx_frame_count; /* number of full rx buffers */
173 wait_queue_head_t open_wait;
174 wait_queue_head_t close_wait;
176 wait_queue_head_t status_event_wait_q;
177 wait_queue_head_t event_wait_q;
178 struct timer_list tx_timer; /* HDLC transmit timeout timer */
179 struct _mgslpc_info *next_device; /* device list link */
181 unsigned short imra_value;
182 unsigned short imrb_value;
183 unsigned char pim_value;
186 struct work_struct task; /* task structure for scheduling bh */
195 int dcd_chkcount; /* check counts to prevent */
196 int cts_chkcount; /* too many IRQs if a signal */
197 int dsr_chkcount; /* is floating */
208 int if_mode; /* serial interface selection (RS-232, v.35 etc) */
210 char device_name[25]; /* device instance name */
212 unsigned int io_base; /* base I/O address of adapter */
213 unsigned int irq_level;
215 MGSL_PARAMS params; /* communications parameters */
217 unsigned char serial_signals; /* current serial signal states */
219 char irq_occurred; /* for diagnostics use */
221 unsigned int init_error; /* startup error (DIAGS) */
223 char flag_buf[MAX_ASYNC_BUFFER_SIZE];
224 BOOLEAN drop_rts_on_tx_done;
226 struct _input_signal_events input_signal_events;
229 struct pcmcia_device *p_dev;
233 /* SPPP/Cisco HDLC device parts */
239 struct net_device *netdev;
244 #define MGSLPC_MAGIC 0x5402
247 * The size of the serial xmit buffer is 1 page, or 4096 bytes
249 #define TXBUFSIZE 4096
252 #define CHA 0x00 /* channel A offset */
253 #define CHB 0x40 /* channel B offset */
256 * FIXME: PPC has PVR defined in asm/reg.h. For now we just undef it.
303 #define IRQ_BREAK_ON BIT15 // rx break detected
304 #define IRQ_DATAOVERRUN BIT14 // receive data overflow
305 #define IRQ_ALLSENT BIT13 // all sent
306 #define IRQ_UNDERRUN BIT12 // transmit data underrun
307 #define IRQ_TIMER BIT11 // timer interrupt
308 #define IRQ_CTS BIT10 // CTS status change
309 #define IRQ_TXREPEAT BIT9 // tx message repeat
310 #define IRQ_TXFIFO BIT8 // transmit pool ready
311 #define IRQ_RXEOM BIT7 // receive message end
312 #define IRQ_EXITHUNT BIT6 // receive frame start
313 #define IRQ_RXTIME BIT6 // rx char timeout
314 #define IRQ_DCD BIT2 // carrier detect status change
315 #define IRQ_OVERRUN BIT1 // receive frame overflow
316 #define IRQ_RXFIFO BIT0 // receive pool full
320 #define XFW BIT6 // transmit FIFO write enable
321 #define CEC BIT2 // command executing
322 #define CTS BIT1 // CTS state
327 #define PVR_AUTOCTS BIT3
328 #define PVR_RS232 0x20 /* 0010b */
329 #define PVR_V35 0xe0 /* 1110b */
330 #define PVR_RS422 0x40 /* 0100b */
332 /* Register access functions */
334 #define write_reg(info, reg, val) outb((val),(info)->io_base + (reg))
335 #define read_reg(info, reg) inb((info)->io_base + (reg))
337 #define read_reg16(info, reg) inw((info)->io_base + (reg))
338 #define write_reg16(info, reg, val) outw((val), (info)->io_base + (reg))
340 #define set_reg_bits(info, reg, mask) \
341 write_reg(info, (reg), \
342 (unsigned char) (read_reg(info, (reg)) | (mask)))
343 #define clear_reg_bits(info, reg, mask) \
344 write_reg(info, (reg), \
345 (unsigned char) (read_reg(info, (reg)) & ~(mask)))
347 * interrupt enable/disable routines
349 static void irq_disable(MGSLPC_INFO *info, unsigned char channel, unsigned short mask)
351 if (channel == CHA) {
352 info->imra_value |= mask;
353 write_reg16(info, CHA + IMR, info->imra_value);
355 info->imrb_value |= mask;
356 write_reg16(info, CHB + IMR, info->imrb_value);
359 static void irq_enable(MGSLPC_INFO *info, unsigned char channel, unsigned short mask)
361 if (channel == CHA) {
362 info->imra_value &= ~mask;
363 write_reg16(info, CHA + IMR, info->imra_value);
365 info->imrb_value &= ~mask;
366 write_reg16(info, CHB + IMR, info->imrb_value);
370 #define port_irq_disable(info, mask) \
371 { info->pim_value |= (mask); write_reg(info, PIM, info->pim_value); }
373 #define port_irq_enable(info, mask) \
374 { info->pim_value &= ~(mask); write_reg(info, PIM, info->pim_value); }
376 static void rx_start(MGSLPC_INFO *info);
377 static void rx_stop(MGSLPC_INFO *info);
379 static void tx_start(MGSLPC_INFO *info);
380 static void tx_stop(MGSLPC_INFO *info);
381 static void tx_set_idle(MGSLPC_INFO *info);
383 static void get_signals(MGSLPC_INFO *info);
384 static void set_signals(MGSLPC_INFO *info);
386 static void reset_device(MGSLPC_INFO *info);
388 static void hdlc_mode(MGSLPC_INFO *info);
389 static void async_mode(MGSLPC_INFO *info);
391 static void tx_timeout(unsigned long context);
393 static int ioctl_common(MGSLPC_INFO *info, unsigned int cmd, unsigned long arg);
396 #define dev_to_port(D) (dev_to_hdlc(D)->priv)
397 static void hdlcdev_tx_done(MGSLPC_INFO *info);
398 static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size);
399 static int hdlcdev_init(MGSLPC_INFO *info);
400 static void hdlcdev_exit(MGSLPC_INFO *info);
403 static void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit);
405 static BOOLEAN register_test(MGSLPC_INFO *info);
406 static BOOLEAN irq_test(MGSLPC_INFO *info);
407 static int adapter_test(MGSLPC_INFO *info);
409 static int claim_resources(MGSLPC_INFO *info);
410 static void release_resources(MGSLPC_INFO *info);
411 static void mgslpc_add_device(MGSLPC_INFO *info);
412 static void mgslpc_remove_device(MGSLPC_INFO *info);
414 static int rx_get_frame(MGSLPC_INFO *info);
415 static void rx_reset_buffers(MGSLPC_INFO *info);
416 static int rx_alloc_buffers(MGSLPC_INFO *info);
417 static void rx_free_buffers(MGSLPC_INFO *info);
419 static irqreturn_t mgslpc_isr(int irq, void *dev_id);
422 * Bottom half interrupt handlers
424 static void bh_handler(void* Context);
425 static void bh_transmit(MGSLPC_INFO *info);
426 static void bh_status(MGSLPC_INFO *info);
431 static int tiocmget(struct tty_struct *tty, struct file *file);
432 static int tiocmset(struct tty_struct *tty, struct file *file,
433 unsigned int set, unsigned int clear);
434 static int get_stats(MGSLPC_INFO *info, struct mgsl_icount __user *user_icount);
435 static int get_params(MGSLPC_INFO *info, MGSL_PARAMS __user *user_params);
436 static int set_params(MGSLPC_INFO *info, MGSL_PARAMS __user *new_params);
437 static int get_txidle(MGSLPC_INFO *info, int __user *idle_mode);
438 static int set_txidle(MGSLPC_INFO *info, int idle_mode);
439 static int set_txenable(MGSLPC_INFO *info, int enable);
440 static int tx_abort(MGSLPC_INFO *info);
441 static int set_rxenable(MGSLPC_INFO *info, int enable);
442 static int wait_events(MGSLPC_INFO *info, int __user *mask);
444 static MGSLPC_INFO *mgslpc_device_list = NULL;
445 static int mgslpc_device_count = 0;
448 * Set this param to non-zero to load eax with the
449 * .text section address and breakpoint on module load.
450 * This is useful for use with gdb and add-symbol-file command.
452 static int break_on_load=0;
455 * Driver major number, defaults to zero to get auto
456 * assigned major number. May be forced as module parameter.
458 static int ttymajor=0;
460 static int debug_level = 0;
461 static int maxframe[MAX_DEVICE_COUNT] = {0,};
462 static int dosyncppp[MAX_DEVICE_COUNT] = {1,1,1,1};
464 module_param(break_on_load, bool, 0);
465 module_param(ttymajor, int, 0);
466 module_param(debug_level, int, 0);
467 module_param_array(maxframe, int, NULL, 0);
468 module_param_array(dosyncppp, int, NULL, 0);
470 MODULE_LICENSE("GPL");
472 static char *driver_name = "SyncLink PC Card driver";
473 static char *driver_version = "$Revision: 4.34 $";
475 static struct tty_driver *serial_driver;
477 /* number of characters left in xmit buffer before we ask for more */
478 #define WAKEUP_CHARS 256
480 static void mgslpc_change_params(MGSLPC_INFO *info);
481 static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout);
483 /* PCMCIA prototypes */
485 static int mgslpc_config(struct pcmcia_device *link);
486 static void mgslpc_release(u_long arg);
487 static void mgslpc_detach(struct pcmcia_device *p_dev);
490 * 1st function defined in .text section. Calling this function in
491 * init_module() followed by a breakpoint allows a remote debugger
492 * (gdb) to get the .text address for the add-symbol-file command.
493 * This allows remote debugging of dynamically loadable modules.
495 static void* mgslpc_get_text_ptr(void)
497 return mgslpc_get_text_ptr;
501 * line discipline callback wrappers
503 * The wrappers maintain line discipline references
504 * while calling into the line discipline.
506 * ldisc_flush_buffer - flush line discipline receive buffers
507 * ldisc_receive_buf - pass receive data to line discipline
510 static void ldisc_flush_buffer(struct tty_struct *tty)
512 struct tty_ldisc *ld = tty_ldisc_ref(tty);
514 if (ld->flush_buffer)
515 ld->flush_buffer(tty);
520 static void ldisc_receive_buf(struct tty_struct *tty,
521 const __u8 *data, char *flags, int count)
523 struct tty_ldisc *ld;
526 ld = tty_ldisc_ref(tty);
529 ld->receive_buf(tty, data, flags, count);
534 static int mgslpc_probe(struct pcmcia_device *link)
539 if (debug_level >= DEBUG_LEVEL_INFO)
540 printk("mgslpc_attach\n");
542 info = (MGSLPC_INFO *)kmalloc(sizeof(MGSLPC_INFO), GFP_KERNEL);
544 printk("Error can't allocate device instance data\n");
548 memset(info, 0, sizeof(MGSLPC_INFO));
549 info->magic = MGSLPC_MAGIC;
550 INIT_WORK(&info->task, bh_handler, info);
551 info->max_frame_size = 4096;
552 info->close_delay = 5*HZ/10;
553 info->closing_wait = 30*HZ;
554 init_waitqueue_head(&info->open_wait);
555 init_waitqueue_head(&info->close_wait);
556 init_waitqueue_head(&info->status_event_wait_q);
557 init_waitqueue_head(&info->event_wait_q);
558 spin_lock_init(&info->lock);
559 spin_lock_init(&info->netlock);
560 memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS));
561 info->idle_mode = HDLC_TXIDLE_FLAGS;
562 info->imra_value = 0xffff;
563 info->imrb_value = 0xffff;
564 info->pim_value = 0xff;
569 /* Initialize the struct pcmcia_device structure */
571 /* Interrupt setup */
572 link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
573 link->irq.IRQInfo1 = IRQ_LEVEL_ID;
574 link->irq.Handler = NULL;
576 link->conf.Attributes = 0;
577 link->conf.IntType = INT_MEMORY_AND_IO;
579 ret = mgslpc_config(link);
583 mgslpc_add_device(info);
588 /* Card has been inserted.
591 #define CS_CHECK(fn, ret) \
592 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
594 static int mgslpc_config(struct pcmcia_device *link)
596 MGSLPC_INFO *info = link->priv;
599 int last_fn, last_ret;
601 cistpl_cftable_entry_t dflt = { 0 };
602 cistpl_cftable_entry_t *cfg;
604 if (debug_level >= DEBUG_LEVEL_INFO)
605 printk("mgslpc_config(0x%p)\n", link);
607 tuple.Attributes = 0;
608 tuple.TupleData = buf;
609 tuple.TupleDataMax = sizeof(buf);
610 tuple.TupleOffset = 0;
612 /* get CIS configuration entry */
614 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
615 CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(link, &tuple));
617 cfg = &(parse.cftable_entry);
618 CS_CHECK(GetTupleData, pcmcia_get_tuple_data(link, &tuple));
619 CS_CHECK(ParseTuple, pcmcia_parse_tuple(link, &tuple, &parse));
621 if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg;
625 link->conf.ConfigIndex = cfg->index;
626 link->conf.Attributes |= CONF_ENABLE_IRQ;
628 /* IO window settings */
629 link->io.NumPorts1 = 0;
630 if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
631 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
632 link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
633 if (!(io->flags & CISTPL_IO_8BIT))
634 link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
635 if (!(io->flags & CISTPL_IO_16BIT))
636 link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
637 link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
638 link->io.BasePort1 = io->win[0].base;
639 link->io.NumPorts1 = io->win[0].len;
640 CS_CHECK(RequestIO, pcmcia_request_io(link, &link->io));
643 link->conf.Attributes = CONF_ENABLE_IRQ;
644 link->conf.IntType = INT_MEMORY_AND_IO;
645 link->conf.ConfigIndex = 8;
646 link->conf.Present = PRESENT_OPTION;
648 link->irq.Attributes |= IRQ_HANDLE_PRESENT;
649 link->irq.Handler = mgslpc_isr;
650 link->irq.Instance = info;
651 CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
653 CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
655 info->io_base = link->io.BasePort1;
656 info->irq_level = link->irq.AssignedIRQ;
658 /* add to linked list of devices */
659 sprintf(info->node.dev_name, "mgslpc0");
660 info->node.major = info->node.minor = 0;
661 link->dev_node = &info->node;
663 printk(KERN_INFO "%s: index 0x%02x:",
664 info->node.dev_name, link->conf.ConfigIndex);
665 if (link->conf.Attributes & CONF_ENABLE_IRQ)
666 printk(", irq %d", link->irq.AssignedIRQ);
667 if (link->io.NumPorts1)
668 printk(", io 0x%04x-0x%04x", link->io.BasePort1,
669 link->io.BasePort1+link->io.NumPorts1-1);
674 cs_error(link, last_fn, last_ret);
675 mgslpc_release((u_long)link);
679 /* Card has been removed.
680 * Unregister device and release PCMCIA configuration.
681 * If device is open, postpone until it is closed.
683 static void mgslpc_release(u_long arg)
685 struct pcmcia_device *link = (struct pcmcia_device *)arg;
687 if (debug_level >= DEBUG_LEVEL_INFO)
688 printk("mgslpc_release(0x%p)\n", link);
690 pcmcia_disable_device(link);
693 static void mgslpc_detach(struct pcmcia_device *link)
695 if (debug_level >= DEBUG_LEVEL_INFO)
696 printk("mgslpc_detach(0x%p)\n", link);
698 ((MGSLPC_INFO *)link->priv)->stop = 1;
699 mgslpc_release((u_long)link);
701 mgslpc_remove_device((MGSLPC_INFO *)link->priv);
704 static int mgslpc_suspend(struct pcmcia_device *link)
706 MGSLPC_INFO *info = link->priv;
713 static int mgslpc_resume(struct pcmcia_device *link)
715 MGSLPC_INFO *info = link->priv;
723 static inline int mgslpc_paranoia_check(MGSLPC_INFO *info,
724 char *name, const char *routine)
726 #ifdef MGSLPC_PARANOIA_CHECK
727 static const char *badmagic =
728 "Warning: bad magic number for mgsl struct (%s) in %s\n";
729 static const char *badinfo =
730 "Warning: null mgslpc_info for (%s) in %s\n";
733 printk(badinfo, name, routine);
736 if (info->magic != MGSLPC_MAGIC) {
737 printk(badmagic, name, routine);
748 #define CMD_RXFIFO BIT7 // release current rx FIFO
749 #define CMD_RXRESET BIT6 // receiver reset
750 #define CMD_RXFIFO_READ BIT5
751 #define CMD_START_TIMER BIT4
752 #define CMD_TXFIFO BIT3 // release current tx FIFO
753 #define CMD_TXEOM BIT1 // transmit end message
754 #define CMD_TXRESET BIT0 // transmit reset
756 static BOOLEAN wait_command_complete(MGSLPC_INFO *info, unsigned char channel)
759 /* wait for command completion */
760 while (read_reg(info, (unsigned char)(channel+STAR)) & BIT2) {
768 static void issue_command(MGSLPC_INFO *info, unsigned char channel, unsigned char cmd)
770 wait_command_complete(info, channel);
771 write_reg(info, (unsigned char) (channel + CMDR), cmd);
774 static void tx_pause(struct tty_struct *tty)
776 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
779 if (mgslpc_paranoia_check(info, tty->name, "tx_pause"))
781 if (debug_level >= DEBUG_LEVEL_INFO)
782 printk("tx_pause(%s)\n",info->device_name);
784 spin_lock_irqsave(&info->lock,flags);
785 if (info->tx_enabled)
787 spin_unlock_irqrestore(&info->lock,flags);
790 static void tx_release(struct tty_struct *tty)
792 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
795 if (mgslpc_paranoia_check(info, tty->name, "tx_release"))
797 if (debug_level >= DEBUG_LEVEL_INFO)
798 printk("tx_release(%s)\n",info->device_name);
800 spin_lock_irqsave(&info->lock,flags);
801 if (!info->tx_enabled)
803 spin_unlock_irqrestore(&info->lock,flags);
806 /* Return next bottom half action to perform.
807 * or 0 if nothing to do.
809 static int bh_action(MGSLPC_INFO *info)
814 spin_lock_irqsave(&info->lock,flags);
816 if (info->pending_bh & BH_RECEIVE) {
817 info->pending_bh &= ~BH_RECEIVE;
819 } else if (info->pending_bh & BH_TRANSMIT) {
820 info->pending_bh &= ~BH_TRANSMIT;
822 } else if (info->pending_bh & BH_STATUS) {
823 info->pending_bh &= ~BH_STATUS;
828 /* Mark BH routine as complete */
829 info->bh_running = 0;
830 info->bh_requested = 0;
833 spin_unlock_irqrestore(&info->lock,flags);
838 static void bh_handler(void* Context)
840 MGSLPC_INFO *info = (MGSLPC_INFO*)Context;
846 if (debug_level >= DEBUG_LEVEL_BH)
847 printk( "%s(%d):bh_handler(%s) entry\n",
848 __FILE__,__LINE__,info->device_name);
850 info->bh_running = 1;
852 while((action = bh_action(info)) != 0) {
854 /* Process work item */
855 if ( debug_level >= DEBUG_LEVEL_BH )
856 printk( "%s(%d):bh_handler() work item action=%d\n",
857 __FILE__,__LINE__,action);
862 while(rx_get_frame(info));
871 /* unknown work item ID */
872 printk("Unknown work item ID=%08X!\n", action);
877 if (debug_level >= DEBUG_LEVEL_BH)
878 printk( "%s(%d):bh_handler(%s) exit\n",
879 __FILE__,__LINE__,info->device_name);
882 static void bh_transmit(MGSLPC_INFO *info)
884 struct tty_struct *tty = info->tty;
885 if (debug_level >= DEBUG_LEVEL_BH)
886 printk("bh_transmit() entry on %s\n", info->device_name);
890 wake_up_interruptible(&tty->write_wait);
894 static void bh_status(MGSLPC_INFO *info)
896 info->ri_chkcount = 0;
897 info->dsr_chkcount = 0;
898 info->dcd_chkcount = 0;
899 info->cts_chkcount = 0;
902 /* eom: non-zero = end of frame */
903 static void rx_ready_hdlc(MGSLPC_INFO *info, int eom)
905 unsigned char data[2];
906 unsigned char fifo_count, read_count, i;
907 RXBUF *buf = (RXBUF*)(info->rx_buf + (info->rx_put * info->rx_buf_size));
909 if (debug_level >= DEBUG_LEVEL_ISR)
910 printk("%s(%d):rx_ready_hdlc(eom=%d)\n",__FILE__,__LINE__,eom);
912 if (!info->rx_enabled)
915 if (info->rx_frame_count >= info->rx_buf_count) {
916 /* no more free buffers */
917 issue_command(info, CHA, CMD_RXRESET);
918 info->pending_bh |= BH_RECEIVE;
919 info->rx_overflow = 1;
920 info->icount.buf_overrun++;
925 /* end of frame, get FIFO count from RBCL register */
926 if (!(fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f)))
932 if (fifo_count == 1) {
934 data[0] = read_reg(info, CHA + RXFIFO);
937 *((unsigned short *) data) = read_reg16(info, CHA + RXFIFO);
939 fifo_count -= read_count;
940 if (!fifo_count && eom)
941 buf->status = data[--read_count];
943 for (i = 0; i < read_count; i++) {
944 if (buf->count >= info->max_frame_size) {
945 /* frame too large, reset receiver and reset current buffer */
946 issue_command(info, CHA, CMD_RXRESET);
950 *(buf->data + buf->count) = data[i];
953 } while (fifo_count);
956 info->pending_bh |= BH_RECEIVE;
957 info->rx_frame_count++;
959 if (info->rx_put >= info->rx_buf_count)
962 issue_command(info, CHA, CMD_RXFIFO);
965 static void rx_ready_async(MGSLPC_INFO *info, int tcd)
967 unsigned char data, status, flag;
970 struct tty_struct *tty = info->tty;
971 struct mgsl_icount *icount = &info->icount;
974 /* early termination, get FIFO count from RBCL register */
975 fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f);
977 /* Zero fifo count could mean 0 or 32 bytes available.
978 * If BIT5 of STAR is set then at least 1 byte is available.
980 if (!fifo_count && (read_reg(info,CHA+STAR) & BIT5))
985 tty_buffer_request_room(tty, fifo_count);
986 /* Flush received async data to receive data buffer. */
988 data = read_reg(info, CHA + RXFIFO);
989 status = read_reg(info, CHA + RXFIFO);
995 // if no frameing/crc error then save data
997 // BIT6:framing error
999 if (status & (BIT7 + BIT6)) {
1005 /* discard char if tty control flags say so */
1006 if (status & info->ignore_status_mask)
1009 status &= info->read_status_mask;
1013 else if (status & BIT6)
1016 work += tty_insert_flip_char(tty, data, flag);
1018 issue_command(info, CHA, CMD_RXFIFO);
1020 if (debug_level >= DEBUG_LEVEL_ISR) {
1021 printk("%s(%d):rx_ready_async",
1023 printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
1024 __FILE__,__LINE__,icount->rx,icount->brk,
1025 icount->parity,icount->frame,icount->overrun);
1029 tty_flip_buffer_push(tty);
1033 static void tx_done(MGSLPC_INFO *info)
1035 if (!info->tx_active)
1038 info->tx_active = 0;
1039 info->tx_aborting = 0;
1041 if (info->params.mode == MGSL_MODE_ASYNC)
1044 info->tx_count = info->tx_put = info->tx_get = 0;
1045 del_timer(&info->tx_timer);
1047 if (info->drop_rts_on_tx_done) {
1049 if (info->serial_signals & SerialSignal_RTS) {
1050 info->serial_signals &= ~SerialSignal_RTS;
1053 info->drop_rts_on_tx_done = 0;
1058 hdlcdev_tx_done(info);
1062 if (info->tty->stopped || info->tty->hw_stopped) {
1066 info->pending_bh |= BH_TRANSMIT;
1070 static void tx_ready(MGSLPC_INFO *info)
1072 unsigned char fifo_count = 32;
1075 if (debug_level >= DEBUG_LEVEL_ISR)
1076 printk("%s(%d):tx_ready(%s)\n", __FILE__,__LINE__,info->device_name);
1078 if (info->params.mode == MGSL_MODE_HDLC) {
1079 if (!info->tx_active)
1082 if (info->tty->stopped || info->tty->hw_stopped) {
1086 if (!info->tx_count)
1087 info->tx_active = 0;
1090 if (!info->tx_count)
1093 while (info->tx_count && fifo_count) {
1094 c = min(2, min_t(int, fifo_count, min(info->tx_count, TXBUFSIZE - info->tx_get)));
1097 write_reg(info, CHA + TXFIFO, *(info->tx_buf + info->tx_get));
1099 write_reg16(info, CHA + TXFIFO,
1100 *((unsigned short*)(info->tx_buf + info->tx_get)));
1102 info->tx_count -= c;
1103 info->tx_get = (info->tx_get + c) & (TXBUFSIZE - 1);
1107 if (info->params.mode == MGSL_MODE_ASYNC) {
1108 if (info->tx_count < WAKEUP_CHARS)
1109 info->pending_bh |= BH_TRANSMIT;
1110 issue_command(info, CHA, CMD_TXFIFO);
1113 issue_command(info, CHA, CMD_TXFIFO);
1115 issue_command(info, CHA, CMD_TXFIFO + CMD_TXEOM);
1119 static void cts_change(MGSLPC_INFO *info)
1122 if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
1123 irq_disable(info, CHB, IRQ_CTS);
1125 if (info->serial_signals & SerialSignal_CTS)
1126 info->input_signal_events.cts_up++;
1128 info->input_signal_events.cts_down++;
1129 wake_up_interruptible(&info->status_event_wait_q);
1130 wake_up_interruptible(&info->event_wait_q);
1132 if (info->flags & ASYNC_CTS_FLOW) {
1133 if (info->tty->hw_stopped) {
1134 if (info->serial_signals & SerialSignal_CTS) {
1135 if (debug_level >= DEBUG_LEVEL_ISR)
1136 printk("CTS tx start...");
1138 info->tty->hw_stopped = 0;
1140 info->pending_bh |= BH_TRANSMIT;
1144 if (!(info->serial_signals & SerialSignal_CTS)) {
1145 if (debug_level >= DEBUG_LEVEL_ISR)
1146 printk("CTS tx stop...");
1148 info->tty->hw_stopped = 1;
1153 info->pending_bh |= BH_STATUS;
1156 static void dcd_change(MGSLPC_INFO *info)
1159 if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
1160 irq_disable(info, CHB, IRQ_DCD);
1162 if (info->serial_signals & SerialSignal_DCD) {
1163 info->input_signal_events.dcd_up++;
1166 info->input_signal_events.dcd_down++;
1168 if (info->netcount) {
1169 if (info->serial_signals & SerialSignal_DCD)
1170 netif_carrier_on(info->netdev);
1172 netif_carrier_off(info->netdev);
1175 wake_up_interruptible(&info->status_event_wait_q);
1176 wake_up_interruptible(&info->event_wait_q);
1178 if (info->flags & ASYNC_CHECK_CD) {
1179 if (debug_level >= DEBUG_LEVEL_ISR)
1180 printk("%s CD now %s...", info->device_name,
1181 (info->serial_signals & SerialSignal_DCD) ? "on" : "off");
1182 if (info->serial_signals & SerialSignal_DCD)
1183 wake_up_interruptible(&info->open_wait);
1185 if (debug_level >= DEBUG_LEVEL_ISR)
1186 printk("doing serial hangup...");
1188 tty_hangup(info->tty);
1191 info->pending_bh |= BH_STATUS;
1194 static void dsr_change(MGSLPC_INFO *info)
1197 if ((info->dsr_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
1198 port_irq_disable(info, PVR_DSR);
1200 if (info->serial_signals & SerialSignal_DSR)
1201 info->input_signal_events.dsr_up++;
1203 info->input_signal_events.dsr_down++;
1204 wake_up_interruptible(&info->status_event_wait_q);
1205 wake_up_interruptible(&info->event_wait_q);
1206 info->pending_bh |= BH_STATUS;
1209 static void ri_change(MGSLPC_INFO *info)
1212 if ((info->ri_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
1213 port_irq_disable(info, PVR_RI);
1215 if (info->serial_signals & SerialSignal_RI)
1216 info->input_signal_events.ri_up++;
1218 info->input_signal_events.ri_down++;
1219 wake_up_interruptible(&info->status_event_wait_q);
1220 wake_up_interruptible(&info->event_wait_q);
1221 info->pending_bh |= BH_STATUS;
1224 /* Interrupt service routine entry point.
1228 * irq interrupt number that caused interrupt
1229 * dev_id device ID supplied during interrupt registration
1231 static irqreturn_t mgslpc_isr(int irq, void *dev_id)
1233 MGSLPC_INFO * info = (MGSLPC_INFO *)dev_id;
1235 unsigned char gis, pis;
1238 if (debug_level >= DEBUG_LEVEL_ISR)
1239 printk("mgslpc_isr(%d) entry.\n", irq);
1243 if (!(info->p_dev->_locked))
1246 spin_lock(&info->lock);
1248 while ((gis = read_reg(info, CHA + GIS))) {
1249 if (debug_level >= DEBUG_LEVEL_ISR)
1250 printk("mgslpc_isr %s gis=%04X\n", info->device_name,gis);
1252 if ((gis & 0x70) || count > 1000) {
1253 printk("synclink_cs:hardware failed or ejected\n");
1258 if (gis & (BIT1 + BIT0)) {
1259 isr = read_reg16(info, CHB + ISR);
1265 if (gis & (BIT3 + BIT2))
1267 isr = read_reg16(info, CHA + ISR);
1268 if (isr & IRQ_TIMER) {
1269 info->irq_occurred = 1;
1270 irq_disable(info, CHA, IRQ_TIMER);
1274 if (isr & IRQ_EXITHUNT) {
1275 info->icount.exithunt++;
1276 wake_up_interruptible(&info->event_wait_q);
1278 if (isr & IRQ_BREAK_ON) {
1280 if (info->flags & ASYNC_SAK)
1283 if (isr & IRQ_RXTIME) {
1284 issue_command(info, CHA, CMD_RXFIFO_READ);
1286 if (isr & (IRQ_RXEOM + IRQ_RXFIFO)) {
1287 if (info->params.mode == MGSL_MODE_HDLC)
1288 rx_ready_hdlc(info, isr & IRQ_RXEOM);
1290 rx_ready_async(info, isr & IRQ_RXEOM);
1294 if (isr & IRQ_UNDERRUN) {
1295 if (info->tx_aborting)
1296 info->icount.txabort++;
1298 info->icount.txunder++;
1301 else if (isr & IRQ_ALLSENT) {
1302 info->icount.txok++;
1305 else if (isr & IRQ_TXFIFO)
1309 pis = read_reg(info, CHA + PIS);
1317 /* Request bottom half processing if there's something
1318 * for it to do and the bh is not already running
1321 if (info->pending_bh && !info->bh_running && !info->bh_requested) {
1322 if ( debug_level >= DEBUG_LEVEL_ISR )
1323 printk("%s(%d):%s queueing bh task.\n",
1324 __FILE__,__LINE__,info->device_name);
1325 schedule_work(&info->task);
1326 info->bh_requested = 1;
1329 spin_unlock(&info->lock);
1331 if (debug_level >= DEBUG_LEVEL_ISR)
1332 printk("%s(%d):mgslpc_isr(%d)exit.\n",
1333 __FILE__,__LINE__,irq);
1338 /* Initialize and start device.
1340 static int startup(MGSLPC_INFO * info)
1344 if (debug_level >= DEBUG_LEVEL_INFO)
1345 printk("%s(%d):startup(%s)\n",__FILE__,__LINE__,info->device_name);
1347 if (info->flags & ASYNC_INITIALIZED)
1350 if (!info->tx_buf) {
1351 /* allocate a page of memory for a transmit buffer */
1352 info->tx_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL);
1353 if (!info->tx_buf) {
1354 printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n",
1355 __FILE__,__LINE__,info->device_name);
1360 info->pending_bh = 0;
1362 memset(&info->icount, 0, sizeof(info->icount));
1364 init_timer(&info->tx_timer);
1365 info->tx_timer.data = (unsigned long)info;
1366 info->tx_timer.function = tx_timeout;
1368 /* Allocate and claim adapter resources */
1369 retval = claim_resources(info);
1371 /* perform existance check and diagnostics */
1373 retval = adapter_test(info);
1376 if (capable(CAP_SYS_ADMIN) && info->tty)
1377 set_bit(TTY_IO_ERROR, &info->tty->flags);
1378 release_resources(info);
1382 /* program hardware for current parameters */
1383 mgslpc_change_params(info);
1386 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1388 info->flags |= ASYNC_INITIALIZED;
1393 /* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware
1395 static void shutdown(MGSLPC_INFO * info)
1397 unsigned long flags;
1399 if (!(info->flags & ASYNC_INITIALIZED))
1402 if (debug_level >= DEBUG_LEVEL_INFO)
1403 printk("%s(%d):mgslpc_shutdown(%s)\n",
1404 __FILE__,__LINE__, info->device_name );
1406 /* clear status wait queue because status changes */
1407 /* can't happen after shutting down the hardware */
1408 wake_up_interruptible(&info->status_event_wait_q);
1409 wake_up_interruptible(&info->event_wait_q);
1411 del_timer(&info->tx_timer);
1414 free_page((unsigned long) info->tx_buf);
1415 info->tx_buf = NULL;
1418 spin_lock_irqsave(&info->lock,flags);
1423 /* TODO:disable interrupts instead of reset to preserve signal states */
1426 if (!info->tty || info->tty->termios->c_cflag & HUPCL) {
1427 info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS);
1431 spin_unlock_irqrestore(&info->lock,flags);
1433 release_resources(info);
1436 set_bit(TTY_IO_ERROR, &info->tty->flags);
1438 info->flags &= ~ASYNC_INITIALIZED;
1441 static void mgslpc_program_hw(MGSLPC_INFO *info)
1443 unsigned long flags;
1445 spin_lock_irqsave(&info->lock,flags);
1449 info->tx_count = info->tx_put = info->tx_get = 0;
1451 if (info->params.mode == MGSL_MODE_HDLC || info->netcount)
1458 info->dcd_chkcount = 0;
1459 info->cts_chkcount = 0;
1460 info->ri_chkcount = 0;
1461 info->dsr_chkcount = 0;
1463 irq_enable(info, CHB, IRQ_DCD | IRQ_CTS);
1464 port_irq_enable(info, (unsigned char) PVR_DSR | PVR_RI);
1467 if (info->netcount || info->tty->termios->c_cflag & CREAD)
1470 spin_unlock_irqrestore(&info->lock,flags);
1473 /* Reconfigure adapter based on new parameters
1475 static void mgslpc_change_params(MGSLPC_INFO *info)
1480 if (!info->tty || !info->tty->termios)
1483 if (debug_level >= DEBUG_LEVEL_INFO)
1484 printk("%s(%d):mgslpc_change_params(%s)\n",
1485 __FILE__,__LINE__, info->device_name );
1487 cflag = info->tty->termios->c_cflag;
1489 /* if B0 rate (hangup) specified then negate DTR and RTS */
1490 /* otherwise assert DTR and RTS */
1492 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
1494 info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
1496 /* byte size and parity */
1498 switch (cflag & CSIZE) {
1499 case CS5: info->params.data_bits = 5; break;
1500 case CS6: info->params.data_bits = 6; break;
1501 case CS7: info->params.data_bits = 7; break;
1502 case CS8: info->params.data_bits = 8; break;
1503 default: info->params.data_bits = 7; break;
1507 info->params.stop_bits = 2;
1509 info->params.stop_bits = 1;
1511 info->params.parity = ASYNC_PARITY_NONE;
1512 if (cflag & PARENB) {
1514 info->params.parity = ASYNC_PARITY_ODD;
1516 info->params.parity = ASYNC_PARITY_EVEN;
1519 info->params.parity = ASYNC_PARITY_SPACE;
1523 /* calculate number of jiffies to transmit a full
1524 * FIFO (32 bytes) at specified data rate
1526 bits_per_char = info->params.data_bits +
1527 info->params.stop_bits + 1;
1529 /* if port data rate is set to 460800 or less then
1530 * allow tty settings to override, otherwise keep the
1531 * current data rate.
1533 if (info->params.data_rate <= 460800) {
1534 info->params.data_rate = tty_get_baud_rate(info->tty);
1537 if ( info->params.data_rate ) {
1538 info->timeout = (32*HZ*bits_per_char) /
1539 info->params.data_rate;
1541 info->timeout += HZ/50; /* Add .02 seconds of slop */
1543 if (cflag & CRTSCTS)
1544 info->flags |= ASYNC_CTS_FLOW;
1546 info->flags &= ~ASYNC_CTS_FLOW;
1549 info->flags &= ~ASYNC_CHECK_CD;
1551 info->flags |= ASYNC_CHECK_CD;
1553 /* process tty input control flags */
1555 info->read_status_mask = 0;
1556 if (I_INPCK(info->tty))
1557 info->read_status_mask |= BIT7 | BIT6;
1558 if (I_IGNPAR(info->tty))
1559 info->ignore_status_mask |= BIT7 | BIT6;
1561 mgslpc_program_hw(info);
1564 /* Add a character to the transmit buffer
1566 static void mgslpc_put_char(struct tty_struct *tty, unsigned char ch)
1568 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1569 unsigned long flags;
1571 if (debug_level >= DEBUG_LEVEL_INFO) {
1572 printk( "%s(%d):mgslpc_put_char(%d) on %s\n",
1573 __FILE__,__LINE__,ch,info->device_name);
1576 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_put_char"))
1582 spin_lock_irqsave(&info->lock,flags);
1584 if (info->params.mode == MGSL_MODE_ASYNC || !info->tx_active) {
1585 if (info->tx_count < TXBUFSIZE - 1) {
1586 info->tx_buf[info->tx_put++] = ch;
1587 info->tx_put &= TXBUFSIZE-1;
1592 spin_unlock_irqrestore(&info->lock,flags);
1595 /* Enable transmitter so remaining characters in the
1596 * transmit buffer are sent.
1598 static void mgslpc_flush_chars(struct tty_struct *tty)
1600 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1601 unsigned long flags;
1603 if (debug_level >= DEBUG_LEVEL_INFO)
1604 printk( "%s(%d):mgslpc_flush_chars() entry on %s tx_count=%d\n",
1605 __FILE__,__LINE__,info->device_name,info->tx_count);
1607 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_chars"))
1610 if (info->tx_count <= 0 || tty->stopped ||
1611 tty->hw_stopped || !info->tx_buf)
1614 if (debug_level >= DEBUG_LEVEL_INFO)
1615 printk( "%s(%d):mgslpc_flush_chars() entry on %s starting transmitter\n",
1616 __FILE__,__LINE__,info->device_name);
1618 spin_lock_irqsave(&info->lock,flags);
1619 if (!info->tx_active)
1621 spin_unlock_irqrestore(&info->lock,flags);
1624 /* Send a block of data
1628 * tty pointer to tty information structure
1629 * buf pointer to buffer containing send data
1630 * count size of send data in bytes
1632 * Returns: number of characters written
1634 static int mgslpc_write(struct tty_struct * tty,
1635 const unsigned char *buf, int count)
1638 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1639 unsigned long flags;
1641 if (debug_level >= DEBUG_LEVEL_INFO)
1642 printk( "%s(%d):mgslpc_write(%s) count=%d\n",
1643 __FILE__,__LINE__,info->device_name,count);
1645 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write") ||
1649 if (info->params.mode == MGSL_MODE_HDLC) {
1650 if (count > TXBUFSIZE) {
1654 if (info->tx_active)
1656 else if (info->tx_count)
1662 min(TXBUFSIZE - info->tx_count - 1,
1663 TXBUFSIZE - info->tx_put));
1667 memcpy(info->tx_buf + info->tx_put, buf, c);
1669 spin_lock_irqsave(&info->lock,flags);
1670 info->tx_put = (info->tx_put + c) & (TXBUFSIZE-1);
1671 info->tx_count += c;
1672 spin_unlock_irqrestore(&info->lock,flags);
1679 if (info->tx_count && !tty->stopped && !tty->hw_stopped) {
1680 spin_lock_irqsave(&info->lock,flags);
1681 if (!info->tx_active)
1683 spin_unlock_irqrestore(&info->lock,flags);
1686 if (debug_level >= DEBUG_LEVEL_INFO)
1687 printk( "%s(%d):mgslpc_write(%s) returning=%d\n",
1688 __FILE__,__LINE__,info->device_name,ret);
1692 /* Return the count of free bytes in transmit buffer
1694 static int mgslpc_write_room(struct tty_struct *tty)
1696 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1699 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write_room"))
1702 if (info->params.mode == MGSL_MODE_HDLC) {
1703 /* HDLC (frame oriented) mode */
1704 if (info->tx_active)
1707 return HDLC_MAX_FRAME_SIZE;
1709 ret = TXBUFSIZE - info->tx_count - 1;
1714 if (debug_level >= DEBUG_LEVEL_INFO)
1715 printk("%s(%d):mgslpc_write_room(%s)=%d\n",
1716 __FILE__,__LINE__, info->device_name, ret);
1720 /* Return the count of bytes in transmit buffer
1722 static int mgslpc_chars_in_buffer(struct tty_struct *tty)
1724 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1727 if (debug_level >= DEBUG_LEVEL_INFO)
1728 printk("%s(%d):mgslpc_chars_in_buffer(%s)\n",
1729 __FILE__,__LINE__, info->device_name );
1731 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_chars_in_buffer"))
1734 if (info->params.mode == MGSL_MODE_HDLC)
1735 rc = info->tx_active ? info->max_frame_size : 0;
1737 rc = info->tx_count;
1739 if (debug_level >= DEBUG_LEVEL_INFO)
1740 printk("%s(%d):mgslpc_chars_in_buffer(%s)=%d\n",
1741 __FILE__,__LINE__, info->device_name, rc);
1746 /* Discard all data in the send buffer
1748 static void mgslpc_flush_buffer(struct tty_struct *tty)
1750 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1751 unsigned long flags;
1753 if (debug_level >= DEBUG_LEVEL_INFO)
1754 printk("%s(%d):mgslpc_flush_buffer(%s) entry\n",
1755 __FILE__,__LINE__, info->device_name );
1757 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_buffer"))
1760 spin_lock_irqsave(&info->lock,flags);
1761 info->tx_count = info->tx_put = info->tx_get = 0;
1762 del_timer(&info->tx_timer);
1763 spin_unlock_irqrestore(&info->lock,flags);
1765 wake_up_interruptible(&tty->write_wait);
1769 /* Send a high-priority XON/XOFF character
1771 static void mgslpc_send_xchar(struct tty_struct *tty, char ch)
1773 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1774 unsigned long flags;
1776 if (debug_level >= DEBUG_LEVEL_INFO)
1777 printk("%s(%d):mgslpc_send_xchar(%s,%d)\n",
1778 __FILE__,__LINE__, info->device_name, ch );
1780 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_send_xchar"))
1785 spin_lock_irqsave(&info->lock,flags);
1786 if (!info->tx_enabled)
1788 spin_unlock_irqrestore(&info->lock,flags);
1792 /* Signal remote device to throttle send data (our receive data)
1794 static void mgslpc_throttle(struct tty_struct * tty)
1796 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1797 unsigned long flags;
1799 if (debug_level >= DEBUG_LEVEL_INFO)
1800 printk("%s(%d):mgslpc_throttle(%s) entry\n",
1801 __FILE__,__LINE__, info->device_name );
1803 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_throttle"))
1807 mgslpc_send_xchar(tty, STOP_CHAR(tty));
1809 if (tty->termios->c_cflag & CRTSCTS) {
1810 spin_lock_irqsave(&info->lock,flags);
1811 info->serial_signals &= ~SerialSignal_RTS;
1813 spin_unlock_irqrestore(&info->lock,flags);
1817 /* Signal remote device to stop throttling send data (our receive data)
1819 static void mgslpc_unthrottle(struct tty_struct * tty)
1821 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
1822 unsigned long flags;
1824 if (debug_level >= DEBUG_LEVEL_INFO)
1825 printk("%s(%d):mgslpc_unthrottle(%s) entry\n",
1826 __FILE__,__LINE__, info->device_name );
1828 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_unthrottle"))
1835 mgslpc_send_xchar(tty, START_CHAR(tty));
1838 if (tty->termios->c_cflag & CRTSCTS) {
1839 spin_lock_irqsave(&info->lock,flags);
1840 info->serial_signals |= SerialSignal_RTS;
1842 spin_unlock_irqrestore(&info->lock,flags);
1846 /* get the current serial statistics
1848 static int get_stats(MGSLPC_INFO * info, struct mgsl_icount __user *user_icount)
1851 if (debug_level >= DEBUG_LEVEL_INFO)
1852 printk("get_params(%s)\n", info->device_name);
1854 memset(&info->icount, 0, sizeof(info->icount));
1856 COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount));
1863 /* get the current serial parameters
1865 static int get_params(MGSLPC_INFO * info, MGSL_PARAMS __user *user_params)
1868 if (debug_level >= DEBUG_LEVEL_INFO)
1869 printk("get_params(%s)\n", info->device_name);
1870 COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS));
1876 /* set the serial parameters
1880 * info pointer to device instance data
1881 * new_params user buffer containing new serial params
1883 * Returns: 0 if success, otherwise error code
1885 static int set_params(MGSLPC_INFO * info, MGSL_PARAMS __user *new_params)
1887 unsigned long flags;
1888 MGSL_PARAMS tmp_params;
1891 if (debug_level >= DEBUG_LEVEL_INFO)
1892 printk("%s(%d):set_params %s\n", __FILE__,__LINE__,
1893 info->device_name );
1894 COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS));
1896 if ( debug_level >= DEBUG_LEVEL_INFO )
1897 printk( "%s(%d):set_params(%s) user buffer copy failed\n",
1898 __FILE__,__LINE__,info->device_name);
1902 spin_lock_irqsave(&info->lock,flags);
1903 memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS));
1904 spin_unlock_irqrestore(&info->lock,flags);
1906 mgslpc_change_params(info);
1911 static int get_txidle(MGSLPC_INFO * info, int __user *idle_mode)
1914 if (debug_level >= DEBUG_LEVEL_INFO)
1915 printk("get_txidle(%s)=%d\n", info->device_name, info->idle_mode);
1916 COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int));
1922 static int set_txidle(MGSLPC_INFO * info, int idle_mode)
1924 unsigned long flags;
1925 if (debug_level >= DEBUG_LEVEL_INFO)
1926 printk("set_txidle(%s,%d)\n", info->device_name, idle_mode);
1927 spin_lock_irqsave(&info->lock,flags);
1928 info->idle_mode = idle_mode;
1930 spin_unlock_irqrestore(&info->lock,flags);
1934 static int get_interface(MGSLPC_INFO * info, int __user *if_mode)
1937 if (debug_level >= DEBUG_LEVEL_INFO)
1938 printk("get_interface(%s)=%d\n", info->device_name, info->if_mode);
1939 COPY_TO_USER(err,if_mode, &info->if_mode, sizeof(int));
1945 static int set_interface(MGSLPC_INFO * info, int if_mode)
1947 unsigned long flags;
1949 if (debug_level >= DEBUG_LEVEL_INFO)
1950 printk("set_interface(%s,%d)\n", info->device_name, if_mode);
1951 spin_lock_irqsave(&info->lock,flags);
1952 info->if_mode = if_mode;
1954 val = read_reg(info, PVR) & 0x0f;
1955 switch (info->if_mode)
1957 case MGSL_INTERFACE_RS232: val |= PVR_RS232; break;
1958 case MGSL_INTERFACE_V35: val |= PVR_V35; break;
1959 case MGSL_INTERFACE_RS422: val |= PVR_RS422; break;
1961 write_reg(info, PVR, val);
1963 spin_unlock_irqrestore(&info->lock,flags);
1967 static int set_txenable(MGSLPC_INFO * info, int enable)
1969 unsigned long flags;
1971 if (debug_level >= DEBUG_LEVEL_INFO)
1972 printk("set_txenable(%s,%d)\n", info->device_name, enable);
1974 spin_lock_irqsave(&info->lock,flags);
1976 if (!info->tx_enabled)
1979 if (info->tx_enabled)
1982 spin_unlock_irqrestore(&info->lock,flags);
1986 static int tx_abort(MGSLPC_INFO * info)
1988 unsigned long flags;
1990 if (debug_level >= DEBUG_LEVEL_INFO)
1991 printk("tx_abort(%s)\n", info->device_name);
1993 spin_lock_irqsave(&info->lock,flags);
1994 if (info->tx_active && info->tx_count &&
1995 info->params.mode == MGSL_MODE_HDLC) {
1996 /* clear data count so FIFO is not filled on next IRQ.
1997 * This results in underrun and abort transmission.
1999 info->tx_count = info->tx_put = info->tx_get = 0;
2000 info->tx_aborting = TRUE;
2002 spin_unlock_irqrestore(&info->lock,flags);
2006 static int set_rxenable(MGSLPC_INFO * info, int enable)
2008 unsigned long flags;
2010 if (debug_level >= DEBUG_LEVEL_INFO)
2011 printk("set_rxenable(%s,%d)\n", info->device_name, enable);
2013 spin_lock_irqsave(&info->lock,flags);
2015 if (!info->rx_enabled)
2018 if (info->rx_enabled)
2021 spin_unlock_irqrestore(&info->lock,flags);
2025 /* wait for specified event to occur
2027 * Arguments: info pointer to device instance data
2028 * mask pointer to bitmask of events to wait for
2029 * Return Value: 0 if successful and bit mask updated with
2030 * of events triggerred,
2031 * otherwise error code
2033 static int wait_events(MGSLPC_INFO * info, int __user *mask_ptr)
2035 unsigned long flags;
2038 struct mgsl_icount cprev, cnow;
2041 struct _input_signal_events oldsigs, newsigs;
2042 DECLARE_WAITQUEUE(wait, current);
2044 COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int));
2048 if (debug_level >= DEBUG_LEVEL_INFO)
2049 printk("wait_events(%s,%d)\n", info->device_name, mask);
2051 spin_lock_irqsave(&info->lock,flags);
2053 /* return immediately if state matches requested events */
2055 s = info->serial_signals;
2057 ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) +
2058 ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) +
2059 ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) +
2060 ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) );
2062 spin_unlock_irqrestore(&info->lock,flags);
2066 /* save current irq counts */
2067 cprev = info->icount;
2068 oldsigs = info->input_signal_events;
2070 if ((info->params.mode == MGSL_MODE_HDLC) &&
2071 (mask & MgslEvent_ExitHuntMode))
2072 irq_enable(info, CHA, IRQ_EXITHUNT);
2074 set_current_state(TASK_INTERRUPTIBLE);
2075 add_wait_queue(&info->event_wait_q, &wait);
2077 spin_unlock_irqrestore(&info->lock,flags);
2082 if (signal_pending(current)) {
2087 /* get current irq counts */
2088 spin_lock_irqsave(&info->lock,flags);
2089 cnow = info->icount;
2090 newsigs = info->input_signal_events;
2091 set_current_state(TASK_INTERRUPTIBLE);
2092 spin_unlock_irqrestore(&info->lock,flags);
2094 /* if no change, wait aborted for some reason */
2095 if (newsigs.dsr_up == oldsigs.dsr_up &&
2096 newsigs.dsr_down == oldsigs.dsr_down &&
2097 newsigs.dcd_up == oldsigs.dcd_up &&
2098 newsigs.dcd_down == oldsigs.dcd_down &&
2099 newsigs.cts_up == oldsigs.cts_up &&
2100 newsigs.cts_down == oldsigs.cts_down &&
2101 newsigs.ri_up == oldsigs.ri_up &&
2102 newsigs.ri_down == oldsigs.ri_down &&
2103 cnow.exithunt == cprev.exithunt &&
2104 cnow.rxidle == cprev.rxidle) {
2110 ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) +
2111 (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) +
2112 (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) +
2113 (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) +
2114 (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) +
2115 (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) +
2116 (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) +
2117 (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) +
2118 (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) +
2119 (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) );
2127 remove_wait_queue(&info->event_wait_q, &wait);
2128 set_current_state(TASK_RUNNING);
2130 if (mask & MgslEvent_ExitHuntMode) {
2131 spin_lock_irqsave(&info->lock,flags);
2132 if (!waitqueue_active(&info->event_wait_q))
2133 irq_disable(info, CHA, IRQ_EXITHUNT);
2134 spin_unlock_irqrestore(&info->lock,flags);
2138 PUT_USER(rc, events, mask_ptr);
2142 static int modem_input_wait(MGSLPC_INFO *info,int arg)
2144 unsigned long flags;
2146 struct mgsl_icount cprev, cnow;
2147 DECLARE_WAITQUEUE(wait, current);
2149 /* save current irq counts */
2150 spin_lock_irqsave(&info->lock,flags);
2151 cprev = info->icount;
2152 add_wait_queue(&info->status_event_wait_q, &wait);
2153 set_current_state(TASK_INTERRUPTIBLE);
2154 spin_unlock_irqrestore(&info->lock,flags);
2158 if (signal_pending(current)) {
2163 /* get new irq counts */
2164 spin_lock_irqsave(&info->lock,flags);
2165 cnow = info->icount;
2166 set_current_state(TASK_INTERRUPTIBLE);
2167 spin_unlock_irqrestore(&info->lock,flags);
2169 /* if no change, wait aborted for some reason */
2170 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2171 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
2176 /* check for change in caller specified modem input */
2177 if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) ||
2178 (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) ||
2179 (arg & TIOCM_CD && cnow.dcd != cprev.dcd) ||
2180 (arg & TIOCM_CTS && cnow.cts != cprev.cts)) {
2187 remove_wait_queue(&info->status_event_wait_q, &wait);
2188 set_current_state(TASK_RUNNING);
2192 /* return the state of the serial control and status signals
2194 static int tiocmget(struct tty_struct *tty, struct file *file)
2196 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
2197 unsigned int result;
2198 unsigned long flags;
2200 spin_lock_irqsave(&info->lock,flags);
2202 spin_unlock_irqrestore(&info->lock,flags);
2204 result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) +
2205 ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) +
2206 ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) +
2207 ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) +
2208 ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) +
2209 ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0);
2211 if (debug_level >= DEBUG_LEVEL_INFO)
2212 printk("%s(%d):%s tiocmget() value=%08X\n",
2213 __FILE__,__LINE__, info->device_name, result );
2217 /* set modem control signals (DTR/RTS)
2219 static int tiocmset(struct tty_struct *tty, struct file *file,
2220 unsigned int set, unsigned int clear)
2222 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
2223 unsigned long flags;
2225 if (debug_level >= DEBUG_LEVEL_INFO)
2226 printk("%s(%d):%s tiocmset(%x,%x)\n",
2227 __FILE__,__LINE__,info->device_name, set, clear);
2229 if (set & TIOCM_RTS)
2230 info->serial_signals |= SerialSignal_RTS;
2231 if (set & TIOCM_DTR)
2232 info->serial_signals |= SerialSignal_DTR;
2233 if (clear & TIOCM_RTS)
2234 info->serial_signals &= ~SerialSignal_RTS;
2235 if (clear & TIOCM_DTR)
2236 info->serial_signals &= ~SerialSignal_DTR;
2238 spin_lock_irqsave(&info->lock,flags);
2240 spin_unlock_irqrestore(&info->lock,flags);
2245 /* Set or clear transmit break condition
2247 * Arguments: tty pointer to tty instance data
2248 * break_state -1=set break condition, 0=clear
2250 static void mgslpc_break(struct tty_struct *tty, int break_state)
2252 MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
2253 unsigned long flags;
2255 if (debug_level >= DEBUG_LEVEL_INFO)
2256 printk("%s(%d):mgslpc_break(%s,%d)\n",
2257 __FILE__,__LINE__, info->device_name, break_state);
2259 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_break"))
2262 spin_lock_irqsave(&info->lock,flags);
2263 if (break_state == -1)
2264 set_reg_bits(info, CHA+DAFO, BIT6);
2266 clear_reg_bits(info, CHA+DAFO, BIT6);
2267 spin_unlock_irqrestore(&info->lock,flags);
2270 /* Service an IOCTL request
2274 * tty pointer to tty instance data
2275 * file pointer to associated file object for device
2276 * cmd IOCTL command code
2277 * arg command argument/context
2279 * Return Value: 0 if success, otherwise error code
2281 static int mgslpc_ioctl(struct tty_struct *tty, struct file * file,
2282 unsigned int cmd, unsigned long arg)
2284 MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
2286 if (debug_level >= DEBUG_LEVEL_INFO)
2287 printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__,__LINE__,
2288 info->device_name, cmd );
2290 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_ioctl"))
2293 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
2294 (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
2295 if (tty->flags & (1 << TTY_IO_ERROR))
2299 return ioctl_common(info, cmd, arg);
2302 static int ioctl_common(MGSLPC_INFO *info, unsigned int cmd, unsigned long arg)
2305 struct mgsl_icount cnow; /* kernel counter temps */
2306 struct serial_icounter_struct __user *p_cuser; /* user space */
2307 void __user *argp = (void __user *)arg;
2308 unsigned long flags;
2311 case MGSL_IOCGPARAMS:
2312 return get_params(info, argp);
2313 case MGSL_IOCSPARAMS:
2314 return set_params(info, argp);
2315 case MGSL_IOCGTXIDLE:
2316 return get_txidle(info, argp);
2317 case MGSL_IOCSTXIDLE:
2318 return set_txidle(info, (int)arg);
2320 return get_interface(info, argp);
2322 return set_interface(info,(int)arg);
2323 case MGSL_IOCTXENABLE:
2324 return set_txenable(info,(int)arg);
2325 case MGSL_IOCRXENABLE:
2326 return set_rxenable(info,(int)arg);
2327 case MGSL_IOCTXABORT:
2328 return tx_abort(info);
2329 case MGSL_IOCGSTATS:
2330 return get_stats(info, argp);
2331 case MGSL_IOCWAITEVENT:
2332 return wait_events(info, argp);
2334 return modem_input_wait(info,(int)arg);
2336 spin_lock_irqsave(&info->lock,flags);
2337 cnow = info->icount;
2338 spin_unlock_irqrestore(&info->lock,flags);
2340 PUT_USER(error,cnow.cts, &p_cuser->cts);
2341 if (error) return error;
2342 PUT_USER(error,cnow.dsr, &p_cuser->dsr);
2343 if (error) return error;
2344 PUT_USER(error,cnow.rng, &p_cuser->rng);
2345 if (error) return error;
2346 PUT_USER(error,cnow.dcd, &p_cuser->dcd);
2347 if (error) return error;
2348 PUT_USER(error,cnow.rx, &p_cuser->rx);
2349 if (error) return error;
2350 PUT_USER(error,cnow.tx, &p_cuser->tx);
2351 if (error) return error;
2352 PUT_USER(error,cnow.frame, &p_cuser->frame);
2353 if (error) return error;
2354 PUT_USER(error,cnow.overrun, &p_cuser->overrun);
2355 if (error) return error;
2356 PUT_USER(error,cnow.parity, &p_cuser->parity);
2357 if (error) return error;
2358 PUT_USER(error,cnow.brk, &p_cuser->brk);
2359 if (error) return error;
2360 PUT_USER(error,cnow.buf_overrun, &p_cuser->buf_overrun);
2361 if (error) return error;
2364 return -ENOIOCTLCMD;
2369 /* Set new termios settings
2373 * tty pointer to tty structure
2374 * termios pointer to buffer to hold returned old termios
2376 static void mgslpc_set_termios(struct tty_struct *tty, struct termios *old_termios)
2378 MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
2379 unsigned long flags;
2381 if (debug_level >= DEBUG_LEVEL_INFO)
2382 printk("%s(%d):mgslpc_set_termios %s\n", __FILE__,__LINE__,
2383 tty->driver->name );
2385 /* just return if nothing has changed */
2386 if ((tty->termios->c_cflag == old_termios->c_cflag)
2387 && (RELEVANT_IFLAG(tty->termios->c_iflag)
2388 == RELEVANT_IFLAG(old_termios->c_iflag)))
2391 mgslpc_change_params(info);
2393 /* Handle transition to B0 status */
2394 if (old_termios->c_cflag & CBAUD &&
2395 !(tty->termios->c_cflag & CBAUD)) {
2396 info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR);
2397 spin_lock_irqsave(&info->lock,flags);
2399 spin_unlock_irqrestore(&info->lock,flags);
2402 /* Handle transition away from B0 status */
2403 if (!(old_termios->c_cflag & CBAUD) &&
2404 tty->termios->c_cflag & CBAUD) {
2405 info->serial_signals |= SerialSignal_DTR;
2406 if (!(tty->termios->c_cflag & CRTSCTS) ||
2407 !test_bit(TTY_THROTTLED, &tty->flags)) {
2408 info->serial_signals |= SerialSignal_RTS;
2410 spin_lock_irqsave(&info->lock,flags);
2412 spin_unlock_irqrestore(&info->lock,flags);
2415 /* Handle turning off CRTSCTS */
2416 if (old_termios->c_cflag & CRTSCTS &&
2417 !(tty->termios->c_cflag & CRTSCTS)) {
2418 tty->hw_stopped = 0;
2423 static void mgslpc_close(struct tty_struct *tty, struct file * filp)
2425 MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
2427 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_close"))
2430 if (debug_level >= DEBUG_LEVEL_INFO)
2431 printk("%s(%d):mgslpc_close(%s) entry, count=%d\n",
2432 __FILE__,__LINE__, info->device_name, info->count);
2437 if (tty_hung_up_p(filp))
2440 if ((tty->count == 1) && (info->count != 1)) {
2442 * tty->count is 1 and the tty structure will be freed.
2443 * info->count should be one in this case.
2444 * if it's not, correct it so that the port is shutdown.
2446 printk("mgslpc_close: bad refcount; tty->count is 1, "
2447 "info->count is %d\n", info->count);
2453 /* if at least one open remaining, leave hardware active */
2457 info->flags |= ASYNC_CLOSING;
2459 /* set tty->closing to notify line discipline to
2460 * only process XON/XOFF characters. Only the N_TTY
2461 * discipline appears to use this (ppp does not).
2465 /* wait for transmit data to clear all layers */
2467 if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE) {
2468 if (debug_level >= DEBUG_LEVEL_INFO)
2469 printk("%s(%d):mgslpc_close(%s) calling tty_wait_until_sent\n",
2470 __FILE__,__LINE__, info->device_name );
2471 tty_wait_until_sent(tty, info->closing_wait);
2474 if (info->flags & ASYNC_INITIALIZED)
2475 mgslpc_wait_until_sent(tty, info->timeout);
2477 if (tty->driver->flush_buffer)
2478 tty->driver->flush_buffer(tty);
2480 ldisc_flush_buffer(tty);
2487 if (info->blocked_open) {
2488 if (info->close_delay) {
2489 msleep_interruptible(jiffies_to_msecs(info->close_delay));
2491 wake_up_interruptible(&info->open_wait);
2494 info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
2496 wake_up_interruptible(&info->close_wait);
2499 if (debug_level >= DEBUG_LEVEL_INFO)
2500 printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__,__LINE__,
2501 tty->driver->name, info->count);
2504 /* Wait until the transmitter is empty.
2506 static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout)
2508 MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
2509 unsigned long orig_jiffies, char_time;
2514 if (debug_level >= DEBUG_LEVEL_INFO)
2515 printk("%s(%d):mgslpc_wait_until_sent(%s) entry\n",
2516 __FILE__,__LINE__, info->device_name );
2518 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_wait_until_sent"))
2521 if (!(info->flags & ASYNC_INITIALIZED))
2524 orig_jiffies = jiffies;
2526 /* Set check interval to 1/5 of estimated time to
2527 * send a character, and make it at least 1. The check
2528 * interval should also be less than the timeout.
2529 * Note: use tight timings here to satisfy the NIST-PCTS.
2532 if ( info->params.data_rate ) {
2533 char_time = info->timeout/(32 * 5);
2540 char_time = min_t(unsigned long, char_time, timeout);
2542 if (info->params.mode == MGSL_MODE_HDLC) {
2543 while (info->tx_active) {
2544 msleep_interruptible(jiffies_to_msecs(char_time));
2545 if (signal_pending(current))
2547 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2551 while ((info->tx_count || info->tx_active) &&
2553 msleep_interruptible(jiffies_to_msecs(char_time));
2554 if (signal_pending(current))
2556 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2562 if (debug_level >= DEBUG_LEVEL_INFO)
2563 printk("%s(%d):mgslpc_wait_until_sent(%s) exit\n",
2564 __FILE__,__LINE__, info->device_name );
2567 /* Called by tty_hangup() when a hangup is signaled.
2568 * This is the same as closing all open files for the port.
2570 static void mgslpc_hangup(struct tty_struct *tty)
2572 MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
2574 if (debug_level >= DEBUG_LEVEL_INFO)
2575 printk("%s(%d):mgslpc_hangup(%s)\n",
2576 __FILE__,__LINE__, info->device_name );
2578 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_hangup"))
2581 mgslpc_flush_buffer(tty);
2585 info->flags &= ~ASYNC_NORMAL_ACTIVE;
2588 wake_up_interruptible(&info->open_wait);
2591 /* Block the current process until the specified port
2592 * is ready to be opened.
2594 static int block_til_ready(struct tty_struct *tty, struct file *filp,
2597 DECLARE_WAITQUEUE(wait, current);
2599 int do_clocal = 0, extra_count = 0;
2600 unsigned long flags;
2602 if (debug_level >= DEBUG_LEVEL_INFO)
2603 printk("%s(%d):block_til_ready on %s\n",
2604 __FILE__,__LINE__, tty->driver->name );
2606 if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
2607 /* nonblock mode is set or port is not enabled */
2608 /* just verify that callout device is not active */
2609 info->flags |= ASYNC_NORMAL_ACTIVE;
2613 if (tty->termios->c_cflag & CLOCAL)
2616 /* Wait for carrier detect and the line to become
2617 * free (i.e., not in use by the callout). While we are in
2618 * this loop, info->count is dropped by one, so that
2619 * mgslpc_close() knows when to free things. We restore it upon
2620 * exit, either normal or abnormal.
2624 add_wait_queue(&info->open_wait, &wait);
2626 if (debug_level >= DEBUG_LEVEL_INFO)
2627 printk("%s(%d):block_til_ready before block on %s count=%d\n",
2628 __FILE__,__LINE__, tty->driver->name, info->count );
2630 spin_lock_irqsave(&info->lock, flags);
2631 if (!tty_hung_up_p(filp)) {
2635 spin_unlock_irqrestore(&info->lock, flags);
2636 info->blocked_open++;
2639 if ((tty->termios->c_cflag & CBAUD)) {
2640 spin_lock_irqsave(&info->lock,flags);
2641 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
2643 spin_unlock_irqrestore(&info->lock,flags);
2646 set_current_state(TASK_INTERRUPTIBLE);
2648 if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)){
2649 retval = (info->flags & ASYNC_HUP_NOTIFY) ?
2650 -EAGAIN : -ERESTARTSYS;
2654 spin_lock_irqsave(&info->lock,flags);
2656 spin_unlock_irqrestore(&info->lock,flags);
2658 if (!(info->flags & ASYNC_CLOSING) &&
2659 (do_clocal || (info->serial_signals & SerialSignal_DCD)) ) {
2663 if (signal_pending(current)) {
2664 retval = -ERESTARTSYS;
2668 if (debug_level >= DEBUG_LEVEL_INFO)
2669 printk("%s(%d):block_til_ready blocking on %s count=%d\n",
2670 __FILE__,__LINE__, tty->driver->name, info->count );
2675 set_current_state(TASK_RUNNING);
2676 remove_wait_queue(&info->open_wait, &wait);
2680 info->blocked_open--;
2682 if (debug_level >= DEBUG_LEVEL_INFO)
2683 printk("%s(%d):block_til_ready after blocking on %s count=%d\n",
2684 __FILE__,__LINE__, tty->driver->name, info->count );
2687 info->flags |= ASYNC_NORMAL_ACTIVE;
2692 static int mgslpc_open(struct tty_struct *tty, struct file * filp)
2696 unsigned long flags;
2698 /* verify range of specified line number */
2700 if ((line < 0) || (line >= mgslpc_device_count)) {
2701 printk("%s(%d):mgslpc_open with invalid line #%d.\n",
2702 __FILE__,__LINE__,line);
2706 /* find the info structure for the specified line */
2707 info = mgslpc_device_list;
2708 while(info && info->line != line)
2709 info = info->next_device;
2710 if (mgslpc_paranoia_check(info, tty->name, "mgslpc_open"))
2713 tty->driver_data = info;
2716 if (debug_level >= DEBUG_LEVEL_INFO)
2717 printk("%s(%d):mgslpc_open(%s), old ref count = %d\n",
2718 __FILE__,__LINE__,tty->driver->name, info->count);
2720 /* If port is closing, signal caller to try again */
2721 if (tty_hung_up_p(filp) || info->flags & ASYNC_CLOSING){
2722 if (info->flags & ASYNC_CLOSING)
2723 interruptible_sleep_on(&info->close_wait);
2724 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2725 -EAGAIN : -ERESTARTSYS);
2729 info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2731 spin_lock_irqsave(&info->netlock, flags);
2732 if (info->netcount) {
2734 spin_unlock_irqrestore(&info->netlock, flags);
2738 spin_unlock_irqrestore(&info->netlock, flags);
2740 if (info->count == 1) {
2741 /* 1st open on this device, init hardware */
2742 retval = startup(info);
2747 retval = block_til_ready(tty, filp, info);
2749 if (debug_level >= DEBUG_LEVEL_INFO)
2750 printk("%s(%d):block_til_ready(%s) returned %d\n",
2751 __FILE__,__LINE__, info->device_name, retval);
2755 if (debug_level >= DEBUG_LEVEL_INFO)
2756 printk("%s(%d):mgslpc_open(%s) success\n",
2757 __FILE__,__LINE__, info->device_name);
2762 if (tty->count == 1)
2763 info->tty = NULL; /* tty layer will release tty struct */
2772 * /proc fs routines....
2775 static inline int line_info(char *buf, MGSLPC_INFO *info)
2779 unsigned long flags;
2781 ret = sprintf(buf, "%s:io:%04X irq:%d",
2782 info->device_name, info->io_base, info->irq_level);
2784 /* output current serial signal states */
2785 spin_lock_irqsave(&info->lock,flags);
2787 spin_unlock_irqrestore(&info->lock,flags);
2791 if (info->serial_signals & SerialSignal_RTS)
2792 strcat(stat_buf, "|RTS");
2793 if (info->serial_signals & SerialSignal_CTS)
2794 strcat(stat_buf, "|CTS");
2795 if (info->serial_signals & SerialSignal_DTR)
2796 strcat(stat_buf, "|DTR");
2797 if (info->serial_signals & SerialSignal_DSR)
2798 strcat(stat_buf, "|DSR");
2799 if (info->serial_signals & SerialSignal_DCD)
2800 strcat(stat_buf, "|CD");
2801 if (info->serial_signals & SerialSignal_RI)
2802 strcat(stat_buf, "|RI");
2804 if (info->params.mode == MGSL_MODE_HDLC) {
2805 ret += sprintf(buf+ret, " HDLC txok:%d rxok:%d",
2806 info->icount.txok, info->icount.rxok);
2807 if (info->icount.txunder)
2808 ret += sprintf(buf+ret, " txunder:%d", info->icount.txunder);
2809 if (info->icount.txabort)
2810 ret += sprintf(buf+ret, " txabort:%d", info->icount.txabort);
2811 if (info->icount.rxshort)
2812 ret += sprintf(buf+ret, " rxshort:%d", info->icount.rxshort);
2813 if (info->icount.rxlong)
2814 ret += sprintf(buf+ret, " rxlong:%d", info->icount.rxlong);
2815 if (info->icount.rxover)
2816 ret += sprintf(buf+ret, " rxover:%d", info->icount.rxover);
2817 if (info->icount.rxcrc)
2818 ret += sprintf(buf+ret, " rxcrc:%d", info->icount.rxcrc);
2820 ret += sprintf(buf+ret, " ASYNC tx:%d rx:%d",
2821 info->icount.tx, info->icount.rx);
2822 if (info->icount.frame)
2823 ret += sprintf(buf+ret, " fe:%d", info->icount.frame);
2824 if (info->icount.parity)
2825 ret += sprintf(buf+ret, " pe:%d", info->icount.parity);
2826 if (info->icount.brk)
2827 ret += sprintf(buf+ret, " brk:%d", info->icount.brk);
2828 if (info->icount.overrun)
2829 ret += sprintf(buf+ret, " oe:%d", info->icount.overrun);
2832 /* Append serial signal status to end */
2833 ret += sprintf(buf+ret, " %s\n", stat_buf+1);
2835 ret += sprintf(buf+ret, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
2836 info->tx_active,info->bh_requested,info->bh_running,
2842 /* Called to print information about devices
2844 static int mgslpc_read_proc(char *page, char **start, off_t off, int count,
2845 int *eof, void *data)
2851 len += sprintf(page, "synclink driver:%s\n", driver_version);
2853 info = mgslpc_device_list;
2855 l = line_info(page + len, info);
2857 if (len+begin > off+count)
2859 if (len+begin < off) {
2863 info = info->next_device;
2868 if (off >= len+begin)
2870 *start = page + (off-begin);
2871 return ((count < begin+len-off) ? count : begin+len-off);
2874 static int rx_alloc_buffers(MGSLPC_INFO *info)
2876 /* each buffer has header and data */
2877 info->rx_buf_size = sizeof(RXBUF) + info->max_frame_size;
2879 /* calculate total allocation size for 8 buffers */
2880 info->rx_buf_total_size = info->rx_buf_size * 8;
2882 /* limit total allocated memory */
2883 if (info->rx_buf_total_size > 0x10000)
2884 info->rx_buf_total_size = 0x10000;
2886 /* calculate number of buffers */
2887 info->rx_buf_count = info->rx_buf_total_size / info->rx_buf_size;
2889 info->rx_buf = kmalloc(info->rx_buf_total_size, GFP_KERNEL);
2890 if (info->rx_buf == NULL)
2893 rx_reset_buffers(info);
2897 static void rx_free_buffers(MGSLPC_INFO *info)
2899 kfree(info->rx_buf);
2900 info->rx_buf = NULL;
2903 static int claim_resources(MGSLPC_INFO *info)
2905 if (rx_alloc_buffers(info) < 0 ) {
2906 printk( "Cant allocate rx buffer %s\n", info->device_name);
2907 release_resources(info);
2913 static void release_resources(MGSLPC_INFO *info)
2915 if (debug_level >= DEBUG_LEVEL_INFO)
2916 printk("release_resources(%s)\n", info->device_name);
2917 rx_free_buffers(info);
2920 /* Add the specified device instance data structure to the
2921 * global linked list of devices and increment the device count.
2923 * Arguments: info pointer to device instance data
2925 static void mgslpc_add_device(MGSLPC_INFO *info)
2927 info->next_device = NULL;
2928 info->line = mgslpc_device_count;
2929 sprintf(info->device_name,"ttySLP%d",info->line);
2931 if (info->line < MAX_DEVICE_COUNT) {
2932 if (maxframe[info->line])
2933 info->max_frame_size = maxframe[info->line];
2934 info->dosyncppp = dosyncppp[info->line];
2937 mgslpc_device_count++;
2939 if (!mgslpc_device_list)
2940 mgslpc_device_list = info;
2942 MGSLPC_INFO *current_dev = mgslpc_device_list;
2943 while( current_dev->next_device )
2944 current_dev = current_dev->next_device;
2945 current_dev->next_device = info;
2948 if (info->max_frame_size < 4096)
2949 info->max_frame_size = 4096;
2950 else if (info->max_frame_size > 65535)
2951 info->max_frame_size = 65535;
2953 printk( "SyncLink PC Card %s:IO=%04X IRQ=%d\n",
2954 info->device_name, info->io_base, info->irq_level);
2961 static void mgslpc_remove_device(MGSLPC_INFO *remove_info)
2963 MGSLPC_INFO *info = mgslpc_device_list;
2964 MGSLPC_INFO *last = NULL;
2967 if (info == remove_info) {
2969 last->next_device = info->next_device;
2971 mgslpc_device_list = info->next_device;
2975 release_resources(info);
2977 mgslpc_device_count--;
2981 info = info->next_device;
2985 static struct pcmcia_device_id mgslpc_ids[] = {
2986 PCMCIA_DEVICE_MANF_CARD(0x02c5, 0x0050),
2989 MODULE_DEVICE_TABLE(pcmcia, mgslpc_ids);
2991 static struct pcmcia_driver mgslpc_driver = {
2992 .owner = THIS_MODULE,
2994 .name = "synclink_cs",
2996 .probe = mgslpc_probe,
2997 .remove = mgslpc_detach,
2998 .id_table = mgslpc_ids,
2999 .suspend = mgslpc_suspend,
3000 .resume = mgslpc_resume,
3003 static const struct tty_operations mgslpc_ops = {
3004 .open = mgslpc_open,
3005 .close = mgslpc_close,
3006 .write = mgslpc_write,
3007 .put_char = mgslpc_put_char,
3008 .flush_chars = mgslpc_flush_chars,
3009 .write_room = mgslpc_write_room,
3010 .chars_in_buffer = mgslpc_chars_in_buffer,
3011 .flush_buffer = mgslpc_flush_buffer,
3012 .ioctl = mgslpc_ioctl,
3013 .throttle = mgslpc_throttle,
3014 .unthrottle = mgslpc_unthrottle,
3015 .send_xchar = mgslpc_send_xchar,
3016 .break_ctl = mgslpc_break,
3017 .wait_until_sent = mgslpc_wait_until_sent,
3018 .read_proc = mgslpc_read_proc,
3019 .set_termios = mgslpc_set_termios,
3021 .start = tx_release,
3022 .hangup = mgslpc_hangup,
3023 .tiocmget = tiocmget,
3024 .tiocmset = tiocmset,
3027 static void synclink_cs_cleanup(void)
3031 printk("Unloading %s: version %s\n", driver_name, driver_version);
3033 while(mgslpc_device_list)
3034 mgslpc_remove_device(mgslpc_device_list);
3036 if (serial_driver) {
3037 if ((rc = tty_unregister_driver(serial_driver)))
3038 printk("%s(%d) failed to unregister tty driver err=%d\n",
3039 __FILE__,__LINE__,rc);
3040 put_tty_driver(serial_driver);
3043 pcmcia_unregister_driver(&mgslpc_driver);
3046 static int __init synclink_cs_init(void)
3050 if (break_on_load) {
3051 mgslpc_get_text_ptr();
3055 printk("%s %s\n", driver_name, driver_version);
3057 if ((rc = pcmcia_register_driver(&mgslpc_driver)) < 0)
3060 serial_driver = alloc_tty_driver(MAX_DEVICE_COUNT);
3061 if (!serial_driver) {
3066 /* Initialize the tty_driver structure */
3068 serial_driver->owner = THIS_MODULE;
3069 serial_driver->driver_name = "synclink_cs";
3070 serial_driver->name = "ttySLP";
3071 serial_driver->major = ttymajor;
3072 serial_driver->minor_start = 64;
3073 serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
3074 serial_driver->subtype = SERIAL_TYPE_NORMAL;
3075 serial_driver->init_termios = tty_std_termios;
3076 serial_driver->init_termios.c_cflag =
3077 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
3078 serial_driver->flags = TTY_DRIVER_REAL_RAW;
3079 tty_set_operations(serial_driver, &mgslpc_ops);
3081 if ((rc = tty_register_driver(serial_driver)) < 0) {
3082 printk("%s(%d):Couldn't register serial driver\n",
3084 put_tty_driver(serial_driver);
3085 serial_driver = NULL;
3089 printk("%s %s, tty major#%d\n",
3090 driver_name, driver_version,
3091 serial_driver->major);
3096 synclink_cs_cleanup();
3100 static void __exit synclink_cs_exit(void)
3102 synclink_cs_cleanup();
3105 module_init(synclink_cs_init);
3106 module_exit(synclink_cs_exit);
3108 static void mgslpc_set_rate(MGSLPC_INFO *info, unsigned char channel, unsigned int rate)
3113 /* note:standard BRG mode is broken in V3.2 chip
3114 * so enhanced mode is always used
3122 for (M = 1; N > 64 && M < 16; M++)
3128 * BGR[7..0] contained in BGR register
3129 * BGR[9..8] contained in CCR2[7..6]
3130 * divisor = (N+1)*2^M
3132 * Note: M *must* not be zero (causes asymetric duty cycle)
3134 write_reg(info, (unsigned char) (channel + BGR),
3135 (unsigned char) ((M << 6) + N));
3136 val = read_reg(info, (unsigned char) (channel + CCR2)) & 0x3f;
3137 val |= ((M << 4) & 0xc0);
3138 write_reg(info, (unsigned char) (channel + CCR2), val);
3142 /* Enabled the AUX clock output at the specified frequency.
3144 static void enable_auxclk(MGSLPC_INFO *info)
3150 * 07..06 MDS[1..0] 10 = transparent HDLC mode
3151 * 05 ADM Address Mode, 0 = no addr recognition
3152 * 04 TMD Timer Mode, 0 = external
3153 * 03 RAC Receiver Active, 0 = inactive
3154 * 02 RTS 0=RTS active during xmit, 1=RTS always active
3155 * 01 TRS Timer Resolution, 1=512
3156 * 00 TLP Test Loop, 0 = no loop
3162 /* channel B RTS is used to enable AUXCLK driver on SP505 */
3163 if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed)
3165 write_reg(info, CHB + MODE, val);
3169 * 07 PU Power Up, 1=active, 0=power down
3170 * 06 MCE Master Clock Enable, 1=enabled
3172 * 04..02 SC[2..0] Encoding
3173 * 01..00 SM[1..0] Serial Mode, 00=HDLC
3177 write_reg(info, CHB + CCR0, 0xc0);
3181 * 07 SFLG Shared Flag, 0 = disable shared flags
3182 * 06 GALP Go Active On Loop, 0 = not used
3183 * 05 GLP Go On Loop, 0 = not used
3184 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3185 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
3186 * 02..00 CM[2..0] Clock Mode
3190 write_reg(info, CHB + CCR1, 0x17);
3194 * 07..06 BGR[9..8] Baud rate bits 9..8
3195 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3196 * 04 SSEL Clock source select, 1=submode b
3197 * 03 TOE 0=TxCLK is input, 1=TxCLK is output
3198 * 02 RWX Read/Write Exchange 0=disabled
3199 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
3200 * 00 DIV, data inversion 0=disabled, 1=enabled
3204 if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed)
3205 write_reg(info, CHB + CCR2, 0x38);
3207 write_reg(info, CHB + CCR2, 0x30);
3211 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3212 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3213 * 05 TST1 Test Pin, 0=normal operation
3214 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3215 * 03..02 Reserved, must be 0
3216 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
3220 write_reg(info, CHB + CCR4, 0x50);
3222 /* if auxclk not enabled, set internal BRG so
3223 * CTS transitions can be detected (requires TxC)
3225 if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed)
3226 mgslpc_set_rate(info, CHB, info->params.clock_speed);
3228 mgslpc_set_rate(info, CHB, 921600);
3231 static void loopback_enable(MGSLPC_INFO *info)
3235 /* CCR1:02..00 CM[2..0] Clock Mode = 111 (clock mode 7) */
3236 val = read_reg(info, CHA + CCR1) | (BIT2 + BIT1 + BIT0);
3237 write_reg(info, CHA + CCR1, val);
3239 /* CCR2:04 SSEL Clock source select, 1=submode b */
3240 val = read_reg(info, CHA + CCR2) | (BIT4 + BIT5);
3241 write_reg(info, CHA + CCR2, val);
3243 /* set LinkSpeed if available, otherwise default to 2Mbps */
3244 if (info->params.clock_speed)
3245 mgslpc_set_rate(info, CHA, info->params.clock_speed);
3247 mgslpc_set_rate(info, CHA, 1843200);
3249 /* MODE:00 TLP Test Loop, 1=loopback enabled */
3250 val = read_reg(info, CHA + MODE) | BIT0;
3251 write_reg(info, CHA + MODE, val);
3254 static void hdlc_mode(MGSLPC_INFO *info)
3257 unsigned char clkmode, clksubmode;
3259 /* disable all interrupts */
3260 irq_disable(info, CHA, 0xffff);
3261 irq_disable(info, CHB, 0xffff);
3262 port_irq_disable(info, 0xff);
3264 /* assume clock mode 0a, rcv=RxC xmt=TxC */
3265 clkmode = clksubmode = 0;
3266 if (info->params.flags & HDLC_FLAG_RXC_DPLL
3267 && info->params.flags & HDLC_FLAG_TXC_DPLL) {
3268 /* clock mode 7a, rcv = DPLL, xmt = DPLL */
3270 } else if (info->params.flags & HDLC_FLAG_RXC_BRG
3271 && info->params.flags & HDLC_FLAG_TXC_BRG) {
3272 /* clock mode 7b, rcv = BRG, xmt = BRG */
3275 } else if (info->params.flags & HDLC_FLAG_RXC_DPLL) {
3276 if (info->params.flags & HDLC_FLAG_TXC_BRG) {
3277 /* clock mode 6b, rcv = DPLL, xmt = BRG/16 */
3281 /* clock mode 6a, rcv = DPLL, xmt = TxC */
3284 } else if (info->params.flags & HDLC_FLAG_TXC_BRG) {
3285 /* clock mode 0b, rcv = RxC, xmt = BRG */
3291 * 07..06 MDS[1..0] 10 = transparent HDLC mode
3292 * 05 ADM Address Mode, 0 = no addr recognition
3293 * 04 TMD Timer Mode, 0 = external
3294 * 03 RAC Receiver Active, 0 = inactive
3295 * 02 RTS 0=RTS active during xmit, 1=RTS always active
3296 * 01 TRS Timer Resolution, 1=512
3297 * 00 TLP Test Loop, 0 = no loop
3302 if (info->params.loopback)
3305 /* preserve RTS state */
3306 if (info->serial_signals & SerialSignal_RTS)
3308 write_reg(info, CHA + MODE, val);
3312 * 07 PU Power Up, 1=active, 0=power down
3313 * 06 MCE Master Clock Enable, 1=enabled
3315 * 04..02 SC[2..0] Encoding
3316 * 01..00 SM[1..0] Serial Mode, 00=HDLC
3321 switch (info->params.encoding)
3323 case HDLC_ENCODING_NRZI:
3326 case HDLC_ENCODING_BIPHASE_SPACE:
3329 case HDLC_ENCODING_BIPHASE_MARK:
3332 case HDLC_ENCODING_BIPHASE_LEVEL:
3334 break; // Manchester
3336 write_reg(info, CHA + CCR0, val);
3340 * 07 SFLG Shared Flag, 0 = disable shared flags
3341 * 06 GALP Go Active On Loop, 0 = not used
3342 * 05 GLP Go On Loop, 0 = not used
3343 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3344 * 03 ITF Interframe Time Fill, 0=mark, 1=flag
3345 * 02..00 CM[2..0] Clock Mode
3349 val = 0x10 + clkmode;
3350 write_reg(info, CHA + CCR1, val);
3354 * 07..06 BGR[9..8] Baud rate bits 9..8
3355 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3356 * 04 SSEL Clock source select, 1=submode b
3357 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3358 * 02 RWX Read/Write Exchange 0=disabled
3359 * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
3360 * 00 DIV, data inversion 0=disabled, 1=enabled
3365 if (clkmode == 2 || clkmode == 3 || clkmode == 6
3366 || clkmode == 7 || (clkmode == 0 && clksubmode == 1))
3370 if (info->params.crc_type == HDLC_CRC_32_CCITT)
3372 if (info->params.encoding == HDLC_ENCODING_NRZB)
3374 write_reg(info, CHA + CCR2, val);
3378 * 07..06 PRE[1..0] Preamble count 00=1, 01=2, 10=4, 11=8
3379 * 05 EPT Enable preamble transmission, 1=enabled
3380 * 04 RADD Receive address pushed to FIFO, 0=disabled
3381 * 03 CRL CRC Reset Level, 0=FFFF
3382 * 02 RCRC Rx CRC 0=On 1=Off
3383 * 01 TCRC Tx CRC 0=On 1=Off
3384 * 00 PSD DPLL Phase Shift Disable
3389 if (info->params.crc_type == HDLC_CRC_NONE)
3391 if (info->params.preamble != HDLC_PREAMBLE_PATTERN_NONE)
3393 switch (info->params.preamble_length)
3395 case HDLC_PREAMBLE_LENGTH_16BITS:
3398 case HDLC_PREAMBLE_LENGTH_32BITS:
3401 case HDLC_PREAMBLE_LENGTH_64BITS:
3405 write_reg(info, CHA + CCR3, val);
3407 /* PRE - Preamble pattern */
3409 switch (info->params.preamble)
3411 case HDLC_PREAMBLE_PATTERN_FLAGS: val = 0x7e; break;
3412 case HDLC_PREAMBLE_PATTERN_10: val = 0xaa; break;
3413 case HDLC_PREAMBLE_PATTERN_01: val = 0x55; break;
3414 case HDLC_PREAMBLE_PATTERN_ONES: val = 0xff; break;
3416 write_reg(info, CHA + PRE, val);
3420 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3421 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3422 * 05 TST1 Test Pin, 0=normal operation
3423 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3424 * 03..02 Reserved, must be 0
3425 * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
3430 write_reg(info, CHA + CCR4, val);
3431 if (info->params.flags & HDLC_FLAG_RXC_DPLL)
3432 mgslpc_set_rate(info, CHA, info->params.clock_speed * 16);
3434 mgslpc_set_rate(info, CHA, info->params.clock_speed);
3436 /* RLCR Receive length check register
3438 * 7 1=enable receive length check
3439 * 6..0 Max frame length = (RL + 1) * 32
3441 write_reg(info, CHA + RLCR, 0);
3443 /* XBCH Transmit Byte Count High
3445 * 07 DMA mode, 0 = interrupt driven
3446 * 06 NRM, 0=ABM (ignored)
3447 * 05 CAS Carrier Auto Start
3448 * 04 XC Transmit Continuously (ignored)
3449 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3454 if (info->params.flags & HDLC_FLAG_AUTO_DCD)
3456 write_reg(info, CHA + XBCH, val);
3457 enable_auxclk(info);
3458 if (info->params.loopback || info->testing_irq)
3459 loopback_enable(info);
3460 if (info->params.flags & HDLC_FLAG_AUTO_CTS)
3462 irq_enable(info, CHB, IRQ_CTS);
3463 /* PVR[3] 1=AUTO CTS active */
3464 set_reg_bits(info, CHA + PVR, BIT3);
3466 clear_reg_bits(info, CHA + PVR, BIT3);
3468 irq_enable(info, CHA,
3469 IRQ_RXEOM + IRQ_RXFIFO + IRQ_ALLSENT +
3470 IRQ_UNDERRUN + IRQ_TXFIFO);
3471 issue_command(info, CHA, CMD_TXRESET + CMD_RXRESET);
3472 wait_command_complete(info, CHA);
3473 read_reg16(info, CHA + ISR); /* clear pending IRQs */
3475 /* Master clock mode enabled above to allow reset commands
3476 * to complete even if no data clocks are present.
3478 * Disable master clock mode for normal communications because
3479 * V3.2 of the ESCC2 has a bug that prevents the transmit all sent
3480 * IRQ when in master clock mode.
3482 * Leave master clock mode enabled for IRQ test because the
3483 * timer IRQ used by the test can only happen in master clock mode.
3485 if (!info->testing_irq)
3486 clear_reg_bits(info, CHA + CCR0, BIT6);
3494 static void rx_stop(MGSLPC_INFO *info)
3496 if (debug_level >= DEBUG_LEVEL_ISR)
3497 printk("%s(%d):rx_stop(%s)\n",
3498 __FILE__,__LINE__, info->device_name );
3500 /* MODE:03 RAC Receiver Active, 0=inactive */
3501 clear_reg_bits(info, CHA + MODE, BIT3);
3503 info->rx_enabled = 0;
3504 info->rx_overflow = 0;
3507 static void rx_start(MGSLPC_INFO *info)
3509 if (debug_level >= DEBUG_LEVEL_ISR)
3510 printk("%s(%d):rx_start(%s)\n",
3511 __FILE__,__LINE__, info->device_name );
3513 rx_reset_buffers(info);
3514 info->rx_enabled = 0;
3515 info->rx_overflow = 0;
3517 /* MODE:03 RAC Receiver Active, 1=active */
3518 set_reg_bits(info, CHA + MODE, BIT3);
3520 info->rx_enabled = 1;
3523 static void tx_start(MGSLPC_INFO *info)
3525 if (debug_level >= DEBUG_LEVEL_ISR)
3526 printk("%s(%d):tx_start(%s)\n",
3527 __FILE__,__LINE__, info->device_name );
3529 if (info->tx_count) {
3530 /* If auto RTS enabled and RTS is inactive, then assert */
3531 /* RTS and set a flag indicating that the driver should */
3532 /* negate RTS when the transmission completes. */
3533 info->drop_rts_on_tx_done = 0;
3535 if (info->params.flags & HDLC_FLAG_AUTO_RTS) {
3537 if (!(info->serial_signals & SerialSignal_RTS)) {
3538 info->serial_signals |= SerialSignal_RTS;
3540 info->drop_rts_on_tx_done = 1;
3544 if (info->params.mode == MGSL_MODE_ASYNC) {
3545 if (!info->tx_active) {
3546 info->tx_active = 1;
3550 info->tx_active = 1;
3552 info->tx_timer.expires = jiffies + msecs_to_jiffies(5000);
3553 add_timer(&info->tx_timer);
3557 if (!info->tx_enabled)
3558 info->tx_enabled = 1;
3561 static void tx_stop(MGSLPC_INFO *info)
3563 if (debug_level >= DEBUG_LEVEL_ISR)
3564 printk("%s(%d):tx_stop(%s)\n",
3565 __FILE__,__LINE__, info->device_name );
3567 del_timer(&info->tx_timer);
3569 info->tx_enabled = 0;
3570 info->tx_active = 0;
3573 /* Reset the adapter to a known state and prepare it for further use.
3575 static void reset_device(MGSLPC_INFO *info)
3577 /* power up both channels (set BIT7) */
3578 write_reg(info, CHA + CCR0, 0x80);
3579 write_reg(info, CHB + CCR0, 0x80);
3580 write_reg(info, CHA + MODE, 0);
3581 write_reg(info, CHB + MODE, 0);
3583 /* disable all interrupts */
3584 irq_disable(info, CHA, 0xffff);
3585 irq_disable(info, CHB, 0xffff);
3586 port_irq_disable(info, 0xff);
3588 /* PCR Port Configuration Register
3590 * 07..04 DEC[3..0] Serial I/F select outputs
3591 * 03 output, 1=AUTO CTS control enabled
3592 * 02 RI Ring Indicator input 0=active
3593 * 01 DSR input 0=active
3594 * 00 DTR output 0=active
3598 write_reg(info, PCR, 0x06);
3600 /* PVR Port Value Register
3602 * 07..04 DEC[3..0] Serial I/F select (0000=disabled)
3603 * 03 AUTO CTS output 1=enabled
3604 * 02 RI Ring Indicator input
3606 * 00 DTR output (1=inactive)
3610 // write_reg(info, PVR, PVR_DTR);
3612 /* IPC Interrupt Port Configuration
3614 * 07 VIS 1=Masked interrupts visible
3615 * 06..05 Reserved, 0
3616 * 04..03 SLA Slave address, 00 ignored
3617 * 02 CASM Cascading Mode, 1=daisy chain
3618 * 01..00 IC[1..0] Interrupt Config, 01=push-pull output, active low
3622 write_reg(info, IPC, 0x05);
3625 static void async_mode(MGSLPC_INFO *info)
3629 /* disable all interrupts */
3630 irq_disable(info, CHA, 0xffff);
3631 irq_disable(info, CHB, 0xffff);
3632 port_irq_disable(info, 0xff);
3637 * 06 FRTS RTS State, 0=active
3638 * 05 FCTS Flow Control on CTS
3639 * 04 FLON Flow Control Enable
3640 * 03 RAC Receiver Active, 0 = inactive
3641 * 02 RTS 0=Auto RTS, 1=manual RTS
3642 * 01 TRS Timer Resolution, 1=512
3643 * 00 TLP Test Loop, 0 = no loop
3648 if (info->params.loopback)
3651 /* preserve RTS state */
3652 if (!(info->serial_signals & SerialSignal_RTS))
3654 write_reg(info, CHA + MODE, val);
3658 * 07 PU Power Up, 1=active, 0=power down
3659 * 06 MCE Master Clock Enable, 1=enabled
3661 * 04..02 SC[2..0] Encoding, 000=NRZ
3662 * 01..00 SM[1..0] Serial Mode, 11=Async
3666 write_reg(info, CHA + CCR0, 0x83);
3670 * 07..05 Reserved, 0
3671 * 04 ODS Output Driver Select, 1=TxD is push-pull output
3672 * 03 BCR Bit Clock Rate, 1=16x
3673 * 02..00 CM[2..0] Clock Mode, 111=BRG
3677 write_reg(info, CHA + CCR1, 0x1f);
3681 * 07..06 BGR[9..8] Baud rate bits 9..8
3682 * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
3683 * 04 SSEL Clock source select, 1=submode b
3684 * 03 TOE 0=TxCLK is input, 0=TxCLK is input
3685 * 02 RWX Read/Write Exchange 0=disabled
3687 * 00 DIV, data inversion 0=disabled, 1=enabled
3691 write_reg(info, CHA + CCR2, 0x10);
3695 * 07..01 Reserved, 0
3696 * 00 PSD DPLL Phase Shift Disable
3700 write_reg(info, CHA + CCR3, 0);
3704 * 07 MCK4 Master Clock Divide by 4, 1=enabled
3705 * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
3706 * 05 TST1 Test Pin, 0=normal operation
3707 * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
3708 * 03..00 Reserved, must be 0
3712 write_reg(info, CHA + CCR4, 0x50);
3713 mgslpc_set_rate(info, CHA, info->params.data_rate * 16);
3718 * 06 XBRK transmit break, 0=normal operation
3719 * 05 Stop bits (0=1, 1=2)
3720 * 04..03 PAR[1..0] Parity (01=odd, 10=even)
3721 * 02 PAREN Parity Enable
3722 * 01..00 CHL[1..0] Character Length (00=8, 01=7)
3726 if (info->params.data_bits != 8)
3727 val |= BIT0; /* 7 bits */
3728 if (info->params.stop_bits != 1)
3730 if (info->params.parity != ASYNC_PARITY_NONE)
3732 val |= BIT2; /* Parity enable */
3733 if (info->params.parity == ASYNC_PARITY_ODD)
3738 write_reg(info, CHA + DAFO, val);
3740 /* RFC Rx FIFO Control
3743 * 06 DPS, 1=parity bit not stored in data byte
3744 * 05 DXS, 0=all data stored in FIFO (including XON/XOFF)
3745 * 04 RFDF Rx FIFO Data Format, 1=status byte stored in FIFO
3746 * 03..02 RFTH[1..0], rx threshold, 11=16 status + 16 data byte
3748 * 00 TCDE Terminate Char Detect Enable, 0=disabled
3752 write_reg(info, CHA + RFC, 0x5c);
3754 /* RLCR Receive length check register
3756 * Max frame length = (RL + 1) * 32
3758 write_reg(info, CHA + RLCR, 0);
3760 /* XBCH Transmit Byte Count High
3762 * 07 DMA mode, 0 = interrupt driven
3763 * 06 NRM, 0=ABM (ignored)
3764 * 05 CAS Carrier Auto Start
3765 * 04 XC Transmit Continuously (ignored)
3766 * 03..00 XBC[10..8] Transmit byte count bits 10..8
3771 if (info->params.flags & HDLC_FLAG_AUTO_DCD)
3773 write_reg(info, CHA + XBCH, val);
3774 if (info->params.flags & HDLC_FLAG_AUTO_CTS)
3775 irq_enable(info, CHA, IRQ_CTS);
3777 /* MODE:03 RAC Receiver Active, 1=active */
3778 set_reg_bits(info, CHA + MODE, BIT3);
3779 enable_auxclk(info);
3780 if (info->params.flags & HDLC_FLAG_AUTO_CTS) {
3781 irq_enable(info, CHB, IRQ_CTS);
3782 /* PVR[3] 1=AUTO CTS active */
3783 set_reg_bits(info, CHA + PVR, BIT3);
3785 clear_reg_bits(info, CHA + PVR, BIT3);
3786 irq_enable(info, CHA,
3787 IRQ_RXEOM + IRQ_RXFIFO + IRQ_BREAK_ON + IRQ_RXTIME +
3788 IRQ_ALLSENT + IRQ_TXFIFO);
3789 issue_command(info, CHA, CMD_TXRESET + CMD_RXRESET);
3790 wait_command_complete(info, CHA);
3791 read_reg16(info, CHA + ISR); /* clear pending IRQs */
3794 /* Set the HDLC idle mode for the transmitter.
3796 static void tx_set_idle(MGSLPC_INFO *info)
3798 /* Note: ESCC2 only supports flags and one idle modes */
3799 if (info->idle_mode == HDLC_TXIDLE_FLAGS)
3800 set_reg_bits(info, CHA + CCR1, BIT3);
3802 clear_reg_bits(info, CHA + CCR1, BIT3);
3805 /* get state of the V24 status (input) signals.
3807 static void get_signals(MGSLPC_INFO *info)
3809 unsigned char status = 0;
3811 /* preserve DTR and RTS */
3812 info->serial_signals &= SerialSignal_DTR + SerialSignal_RTS;
3814 if (read_reg(info, CHB + VSTR) & BIT7)
3815 info->serial_signals |= SerialSignal_DCD;
3816 if (read_reg(info, CHB + STAR) & BIT1)
3817 info->serial_signals |= SerialSignal_CTS;
3819 status = read_reg(info, CHA + PVR);
3820 if (!(status & PVR_RI))
3821 info->serial_signals |= SerialSignal_RI;
3822 if (!(status & PVR_DSR))
3823 info->serial_signals |= SerialSignal_DSR;
3826 /* Set the state of DTR and RTS based on contents of
3827 * serial_signals member of device extension.
3829 static void set_signals(MGSLPC_INFO *info)
3833 val = read_reg(info, CHA + MODE);
3834 if (info->params.mode == MGSL_MODE_ASYNC) {
3835 if (info->serial_signals & SerialSignal_RTS)
3840 if (info->serial_signals & SerialSignal_RTS)
3845 write_reg(info, CHA + MODE, val);
3847 if (info->serial_signals & SerialSignal_DTR)
3848 clear_reg_bits(info, CHA + PVR, PVR_DTR);
3850 set_reg_bits(info, CHA + PVR, PVR_DTR);
3853 static void rx_reset_buffers(MGSLPC_INFO *info)
3860 info->rx_frame_count = 0;
3861 for (i=0 ; i < info->rx_buf_count ; i++) {
3862 buf = (RXBUF*)(info->rx_buf + (i * info->rx_buf_size));
3863 buf->status = buf->count = 0;
3867 /* Attempt to return a received HDLC frame
3868 * Only frames received without errors are returned.
3870 * Returns 1 if frame returned, otherwise 0
3872 static int rx_get_frame(MGSLPC_INFO *info)
3874 unsigned short status;
3876 unsigned int framesize = 0;
3877 unsigned long flags;
3878 struct tty_struct *tty = info->tty;
3879 int return_frame = 0;
3881 if (info->rx_frame_count == 0)
3884 buf = (RXBUF*)(info->rx_buf + (info->rx_get * info->rx_buf_size));
3886 status = buf->status;
3888 /* 07 VFR 1=valid frame
3889 * 06 RDO 1=data overrun
3890 * 05 CRC 1=OK, 0=error
3891 * 04 RAB 1=frame aborted
3893 if ((status & 0xf0) != 0xA0) {
3894 if (!(status & BIT7) || (status & BIT4))
3895 info->icount.rxabort++;
3896 else if (status & BIT6)
3897 info->icount.rxover++;
3898 else if (!(status & BIT5)) {
3899 info->icount.rxcrc++;
3900 if (info->params.crc_type & HDLC_CRC_RETURN_EX)
3906 struct net_device_stats *stats = hdlc_stats(info->netdev);
3908 stats->rx_frame_errors++;
3915 framesize = buf->count;
3917 if (debug_level >= DEBUG_LEVEL_BH)
3918 printk("%s(%d):rx_get_frame(%s) status=%04X size=%d\n",
3919 __FILE__,__LINE__,info->device_name,status,framesize);
3921 if (debug_level >= DEBUG_LEVEL_DATA)
3922 trace_block(info, buf->data, framesize, 0);
3925 if ((info->params.crc_type & HDLC_CRC_RETURN_EX &&
3926 framesize+1 > info->max_frame_size) ||
3927 framesize > info->max_frame_size)
3928 info->icount.rxlong++;
3931 info->icount.rxok++;
3933 if (info->params.crc_type & HDLC_CRC_RETURN_EX) {
3934 *(buf->data + framesize) = status & BIT5 ? RX_OK:RX_CRC_ERROR;
3940 hdlcdev_rx(info, buf->data, framesize);
3943 ldisc_receive_buf(tty, buf->data, info->flag_buf, framesize);
3947 spin_lock_irqsave(&info->lock,flags);
3948 buf->status = buf->count = 0;
3949 info->rx_frame_count--;
3951 if (info->rx_get >= info->rx_buf_count)
3953 spin_unlock_irqrestore(&info->lock,flags);
3958 static BOOLEAN register_test(MGSLPC_INFO *info)
3960 static unsigned char patterns[] =
3961 { 0x00, 0xff, 0xaa, 0x55, 0x69, 0x96, 0x0f };
3962 static unsigned int count = ARRAY_SIZE(patterns);
3965 unsigned long flags;
3967 spin_lock_irqsave(&info->lock,flags);
3970 for (i = 0; i < count; i++) {
3971 write_reg(info, XAD1, patterns[i]);
3972 write_reg(info, XAD2, patterns[(i + 1) % count]);
3973 if ((read_reg(info, XAD1) != patterns[i]) ||
3974 (read_reg(info, XAD2) != patterns[(i + 1) % count])) {
3980 spin_unlock_irqrestore(&info->lock,flags);
3984 static BOOLEAN irq_test(MGSLPC_INFO *info)
3986 unsigned long end_time;
3987 unsigned long flags;
3989 spin_lock_irqsave(&info->lock,flags);
3992 info->testing_irq = TRUE;
3995 info->irq_occurred = FALSE;
3997 /* init hdlc mode */
3999 irq_enable(info, CHA, IRQ_TIMER);
4000 write_reg(info, CHA + TIMR, 0); /* 512 cycles */
4001 issue_command(info, CHA, CMD_START_TIMER);
4003 spin_unlock_irqrestore(&info->lock,flags);
4006 while(end_time-- && !info->irq_occurred) {
4007 msleep_interruptible(10);
4010 info->testing_irq = FALSE;
4012 spin_lock_irqsave(&info->lock,flags);
4014 spin_unlock_irqrestore(&info->lock,flags);
4016 return info->irq_occurred ? TRUE : FALSE;
4019 static int adapter_test(MGSLPC_INFO *info)
4021 if (!register_test(info)) {
4022 info->init_error = DiagStatus_AddressFailure;
4023 printk( "%s(%d):Register test failure for device %s Addr=%04X\n",
4024 __FILE__,__LINE__,info->device_name, (unsigned short)(info->io_base) );
4028 if (!irq_test(info)) {
4029 info->init_error = DiagStatus_IrqFailure;
4030 printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n",
4031 __FILE__,__LINE__,info->device_name, (unsigned short)(info->irq_level) );
4035 if (debug_level >= DEBUG_LEVEL_INFO)
4036 printk("%s(%d):device %s passed diagnostics\n",
4037 __FILE__,__LINE__,info->device_name);
4041 static void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit)
4046 printk("%s tx data:\n",info->device_name);
4048 printk("%s rx data:\n",info->device_name);
4056 for(i=0;i<linecount;i++)
4057 printk("%02X ",(unsigned char)data[i]);
4060 for(i=0;i<linecount;i++) {
4061 if (data[i]>=040 && data[i]<=0176)
4062 printk("%c",data[i]);
4073 /* HDLC frame time out
4074 * update stats and do tx completion processing
4076 static void tx_timeout(unsigned long context)
4078 MGSLPC_INFO *info = (MGSLPC_INFO*)context;
4079 unsigned long flags;
4081 if ( debug_level >= DEBUG_LEVEL_INFO )
4082 printk( "%s(%d):tx_timeout(%s)\n",
4083 __FILE__,__LINE__,info->device_name);
4084 if(info->tx_active &&
4085 info->params.mode == MGSL_MODE_HDLC) {
4086 info->icount.txtimeout++;
4088 spin_lock_irqsave(&info->lock,flags);
4089 info->tx_active = 0;
4090 info->tx_count = info->tx_put = info->tx_get = 0;
4092 spin_unlock_irqrestore(&info->lock,flags);
4096 hdlcdev_tx_done(info);
4105 * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
4106 * set encoding and frame check sequence (FCS) options
4108 * dev pointer to network device structure
4109 * encoding serial encoding setting
4110 * parity FCS setting
4112 * returns 0 if success, otherwise error code
4114 static int hdlcdev_attach(struct net_device *dev, unsigned short encoding,
4115 unsigned short parity)
4117 MGSLPC_INFO *info = dev_to_port(dev);
4118 unsigned char new_encoding;
4119 unsigned short new_crctype;
4121 /* return error if TTY interface open */
4127 case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break;
4128 case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break;
4129 case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break;
4130 case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break;
4131 case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break;
4132 default: return -EINVAL;
4137 case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break;
4138 case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break;
4139 case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break;
4140 default: return -EINVAL;
4143 info->params.encoding = new_encoding;
4144 info->params.crc_type = new_crctype;
4146 /* if network interface up, reprogram hardware */
4148 mgslpc_program_hw(info);
4154 * called by generic HDLC layer to send frame
4156 * skb socket buffer containing HDLC frame
4157 * dev pointer to network device structure
4159 * returns 0 if success, otherwise error code
4161 static int hdlcdev_xmit(struct sk_buff *skb, struct net_device *dev)
4163 MGSLPC_INFO *info = dev_to_port(dev);
4164 struct net_device_stats *stats = hdlc_stats(dev);
4165 unsigned long flags;
4167 if (debug_level >= DEBUG_LEVEL_INFO)
4168 printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name);
4170 /* stop sending until this frame completes */
4171 netif_stop_queue(dev);
4173 /* copy data to device buffers */
4174 memcpy(info->tx_buf, skb->data, skb->len);
4176 info->tx_put = info->tx_count = skb->len;
4178 /* update network statistics */
4179 stats->tx_packets++;
4180 stats->tx_bytes += skb->len;
4182 /* done with socket buffer, so free it */
4185 /* save start time for transmit timeout detection */
4186 dev->trans_start = jiffies;
4188 /* start hardware transmitter if necessary */
4189 spin_lock_irqsave(&info->lock,flags);
4190 if (!info->tx_active)
4192 spin_unlock_irqrestore(&info->lock,flags);
4198 * called by network layer when interface enabled
4199 * claim resources and initialize hardware
4201 * dev pointer to network device structure
4203 * returns 0 if success, otherwise error code
4205 static int hdlcdev_open(struct net_device *dev)
4207 MGSLPC_INFO *info = dev_to_port(dev);
4209 unsigned long flags;
4211 if (debug_level >= DEBUG_LEVEL_INFO)
4212 printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name);
4214 /* generic HDLC layer open processing */
4215 if ((rc = hdlc_open(dev)))
4218 /* arbitrate between network and tty opens */
4219 spin_lock_irqsave(&info->netlock, flags);
4220 if (info->count != 0 || info->netcount != 0) {
4221 printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name);
4222 spin_unlock_irqrestore(&info->netlock, flags);
4226 spin_unlock_irqrestore(&info->netlock, flags);
4228 /* claim resources and init adapter */
4229 if ((rc = startup(info)) != 0) {
4230 spin_lock_irqsave(&info->netlock, flags);
4232 spin_unlock_irqrestore(&info->netlock, flags);
4236 /* assert DTR and RTS, apply hardware settings */
4237 info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
4238 mgslpc_program_hw(info);
4240 /* enable network layer transmit */
4241 dev->trans_start = jiffies;
4242 netif_start_queue(dev);
4244 /* inform generic HDLC layer of current DCD status */
4245 spin_lock_irqsave(&info->lock, flags);
4247 spin_unlock_irqrestore(&info->lock, flags);
4248 if (info->serial_signals & SerialSignal_DCD)
4249 netif_carrier_on(dev);
4251 netif_carrier_off(dev);
4256 * called by network layer when interface is disabled
4257 * shutdown hardware and release resources
4259 * dev pointer to network device structure
4261 * returns 0 if success, otherwise error code
4263 static int hdlcdev_close(struct net_device *dev)
4265 MGSLPC_INFO *info = dev_to_port(dev);
4266 unsigned long flags;
4268 if (debug_level >= DEBUG_LEVEL_INFO)
4269 printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name);
4271 netif_stop_queue(dev);
4273 /* shutdown adapter and release resources */
4278 spin_lock_irqsave(&info->netlock, flags);
4280 spin_unlock_irqrestore(&info->netlock, flags);
4286 * called by network layer to process IOCTL call to network device
4288 * dev pointer to network device structure
4289 * ifr pointer to network interface request structure
4290 * cmd IOCTL command code
4292 * returns 0 if success, otherwise error code
4294 static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
4296 const size_t size = sizeof(sync_serial_settings);
4297 sync_serial_settings new_line;
4298 sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync;
4299 MGSLPC_INFO *info = dev_to_port(dev);
4302 if (debug_level >= DEBUG_LEVEL_INFO)
4303 printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name);
4305 /* return error if TTY interface open */
4309 if (cmd != SIOCWANDEV)
4310 return hdlc_ioctl(dev, ifr, cmd);
4312 switch(ifr->ifr_settings.type) {
4313 case IF_GET_IFACE: /* return current sync_serial_settings */
4315 ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL;
4316 if (ifr->ifr_settings.size < size) {
4317 ifr->ifr_settings.size = size; /* data size wanted */
4321 flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
4322 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
4323 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
4324 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
4327 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break;
4328 case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break;
4329 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break;
4330 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break;
4331 default: new_line.clock_type = CLOCK_DEFAULT;
4334 new_line.clock_rate = info->params.clock_speed;
4335 new_line.loopback = info->params.loopback ? 1:0;
4337 if (copy_to_user(line, &new_line, size))
4341 case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */
4343 if(!capable(CAP_NET_ADMIN))
4345 if (copy_from_user(&new_line, line, size))
4348 switch (new_line.clock_type)
4350 case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break;
4351 case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break;
4352 case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break;
4353 case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break;
4354 case CLOCK_DEFAULT: flags = info->params.flags &
4355 (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
4356 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
4357 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
4358 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break;
4359 default: return -EINVAL;
4362 if (new_line.loopback != 0 && new_line.loopback != 1)
4365 info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
4366 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
4367 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
4368 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
4369 info->params.flags |= flags;
4371 info->params.loopback = new_line.loopback;
4373 if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG))
4374 info->params.clock_speed = new_line.clock_rate;
4376 info->params.clock_speed = 0;
4378 /* if network interface up, reprogram hardware */
4380 mgslpc_program_hw(info);
4384 return hdlc_ioctl(dev, ifr, cmd);
4389 * called by network layer when transmit timeout is detected
4391 * dev pointer to network device structure
4393 static void hdlcdev_tx_timeout(struct net_device *dev)
4395 MGSLPC_INFO *info = dev_to_port(dev);
4396 struct net_device_stats *stats = hdlc_stats(dev);
4397 unsigned long flags;
4399 if (debug_level >= DEBUG_LEVEL_INFO)
4400 printk("hdlcdev_tx_timeout(%s)\n",dev->name);
4403 stats->tx_aborted_errors++;
4405 spin_lock_irqsave(&info->lock,flags);
4407 spin_unlock_irqrestore(&info->lock,flags);
4409 netif_wake_queue(dev);
4413 * called by device driver when transmit completes
4414 * reenable network layer transmit if stopped
4416 * info pointer to device instance information
4418 static void hdlcdev_tx_done(MGSLPC_INFO *info)
4420 if (netif_queue_stopped(info->netdev))
4421 netif_wake_queue(info->netdev);
4425 * called by device driver when frame received
4426 * pass frame to network layer
4428 * info pointer to device instance information
4429 * buf pointer to buffer contianing frame data
4430 * size count of data bytes in buf
4432 static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size)
4434 struct sk_buff *skb = dev_alloc_skb(size);
4435 struct net_device *dev = info->netdev;
4436 struct net_device_stats *stats = hdlc_stats(dev);
4438 if (debug_level >= DEBUG_LEVEL_INFO)
4439 printk("hdlcdev_rx(%s)\n",dev->name);
4442 printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n", dev->name);
4443 stats->rx_dropped++;
4447 memcpy(skb_put(skb, size),buf,size);
4449 skb->protocol = hdlc_type_trans(skb, info->netdev);
4451 stats->rx_packets++;
4452 stats->rx_bytes += size;
4456 info->netdev->last_rx = jiffies;
4460 * called by device driver when adding device instance
4461 * do generic HDLC initialization
4463 * info pointer to device instance information
4465 * returns 0 if success, otherwise error code
4467 static int hdlcdev_init(MGSLPC_INFO *info)
4470 struct net_device *dev;
4473 /* allocate and initialize network and HDLC layer objects */
4475 if (!(dev = alloc_hdlcdev(info))) {
4476 printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__);
4480 /* for network layer reporting purposes only */
4481 dev->base_addr = info->io_base;
4482 dev->irq = info->irq_level;
4484 /* network layer callbacks and settings */
4485 dev->do_ioctl = hdlcdev_ioctl;
4486 dev->open = hdlcdev_open;
4487 dev->stop = hdlcdev_close;
4488 dev->tx_timeout = hdlcdev_tx_timeout;
4489 dev->watchdog_timeo = 10*HZ;
4490 dev->tx_queue_len = 50;
4492 /* generic HDLC layer callbacks and settings */
4493 hdlc = dev_to_hdlc(dev);
4494 hdlc->attach = hdlcdev_attach;
4495 hdlc->xmit = hdlcdev_xmit;
4497 /* register objects with HDLC layer */
4498 if ((rc = register_hdlc_device(dev))) {
4499 printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__);
4509 * called by device driver when removing device instance
4510 * do generic HDLC cleanup
4512 * info pointer to device instance information
4514 static void hdlcdev_exit(MGSLPC_INFO *info)
4516 unregister_hdlc_device(info->netdev);
4517 free_netdev(info->netdev);
4518 info->netdev = NULL;
4521 #endif /* CONFIG_HDLC */