1 /*****************************************************************************/
4 * stallion.c -- stallion multiport serial driver.
6 * Copyright (C) 1996-1999 Stallion Technologies
7 * Copyright (C) 1994-1996 Greg Ungerer.
9 * This code is loosely based on the Linux serial driver, written by
10 * Linus Torvalds, Theodore T'so and others.
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 /*****************************************************************************/
29 #include <linux/module.h>
30 #include <linux/slab.h>
31 #include <linux/interrupt.h>
32 #include <linux/tty.h>
33 #include <linux/tty_flip.h>
34 #include <linux/serial.h>
35 #include <linux/cd1400.h>
36 #include <linux/sc26198.h>
37 #include <linux/comstats.h>
38 #include <linux/stallion.h>
39 #include <linux/ioport.h>
40 #include <linux/init.h>
41 #include <linux/smp_lock.h>
42 #include <linux/device.h>
43 #include <linux/delay.h>
44 #include <linux/ctype.h>
47 #include <asm/uaccess.h>
49 #include <linux/pci.h>
51 /*****************************************************************************/
54 * Define different board types. Use the standard Stallion "assigned"
55 * board numbers. Boards supported in this driver are abbreviated as
56 * EIO = EasyIO and ECH = EasyConnection 8/32.
62 #define BRD_ECH64PCI 27
63 #define BRD_EASYIOPCI 28
69 unsigned long memaddr;
74 static unsigned int stl_nrbrds;
76 /*****************************************************************************/
79 * Define some important driver characteristics. Device major numbers
80 * allocated as per Linux Device Registry.
82 #ifndef STL_SIOMEMMAJOR
83 #define STL_SIOMEMMAJOR 28
85 #ifndef STL_SERIALMAJOR
86 #define STL_SERIALMAJOR 24
88 #ifndef STL_CALLOUTMAJOR
89 #define STL_CALLOUTMAJOR 25
93 * Set the TX buffer size. Bigger is better, but we don't want
94 * to chew too much memory with buffers!
96 #define STL_TXBUFLOW 512
97 #define STL_TXBUFSIZE 4096
99 /*****************************************************************************/
102 * Define our local driver identity first. Set up stuff to deal with
103 * all the local structures required by a serial tty driver.
105 static char *stl_drvtitle = "Stallion Multiport Serial Driver";
106 static char *stl_drvname = "stallion";
107 static char *stl_drvversion = "5.6.0";
109 static struct tty_driver *stl_serial;
112 * Define a local default termios struct. All ports will be created
113 * with this termios initially. Basically all it defines is a raw port
114 * at 9600, 8 data bits, 1 stop bit.
116 static struct ktermios stl_deftermios = {
117 .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL),
124 * Define global place to put buffer overflow characters.
126 static char stl_unwanted[SC26198_RXFIFOSIZE];
128 /*****************************************************************************/
130 static DEFINE_MUTEX(stl_brdslock);
131 static struct stlbrd *stl_brds[STL_MAXBRDS];
134 * Per board state flags. Used with the state field of the board struct.
135 * Not really much here!
137 #define BRD_FOUND 0x1
138 #define STL_PROBED 0x2
142 * Define the port structure istate flags. These set of flags are
143 * modified at interrupt time - so setting and reseting them needs
144 * to be atomic. Use the bit clear/setting routines for this.
146 #define ASYI_TXBUSY 1
148 #define ASYI_TXFLOWED 3
151 * Define an array of board names as printable strings. Handy for
152 * referencing boards when printing trace and stuff.
154 static char *stl_brdnames[] = {
186 /*****************************************************************************/
189 * Define some string labels for arguments passed from the module
190 * load line. These allow for easy board definitions, and easy
191 * modification of the io, memory and irq resoucres.
193 static unsigned int stl_nargs;
194 static char *board0[4];
195 static char *board1[4];
196 static char *board2[4];
197 static char *board3[4];
199 static char **stl_brdsp[] = {
207 * Define a set of common board names, and types. This is used to
208 * parse any module arguments.
215 { "easyio", BRD_EASYIO },
216 { "eio", BRD_EASYIO },
217 { "20", BRD_EASYIO },
218 { "ec8/32", BRD_ECH },
219 { "ec8/32-at", BRD_ECH },
220 { "ec8/32-isa", BRD_ECH },
222 { "echat", BRD_ECH },
224 { "ec8/32-mc", BRD_ECHMC },
225 { "ec8/32-mca", BRD_ECHMC },
226 { "echmc", BRD_ECHMC },
227 { "echmca", BRD_ECHMC },
229 { "ec8/32-pc", BRD_ECHPCI },
230 { "ec8/32-pci", BRD_ECHPCI },
231 { "26", BRD_ECHPCI },
232 { "ec8/64-pc", BRD_ECH64PCI },
233 { "ec8/64-pci", BRD_ECH64PCI },
234 { "ech-pci", BRD_ECH64PCI },
235 { "echpci", BRD_ECH64PCI },
236 { "echpc", BRD_ECH64PCI },
237 { "27", BRD_ECH64PCI },
238 { "easyio-pc", BRD_EASYIOPCI },
239 { "easyio-pci", BRD_EASYIOPCI },
240 { "eio-pci", BRD_EASYIOPCI },
241 { "eiopci", BRD_EASYIOPCI },
242 { "28", BRD_EASYIOPCI },
246 * Define the module agruments.
249 module_param_array(board0, charp, &stl_nargs, 0);
250 MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]");
251 module_param_array(board1, charp, &stl_nargs, 0);
252 MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]");
253 module_param_array(board2, charp, &stl_nargs, 0);
254 MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]");
255 module_param_array(board3, charp, &stl_nargs, 0);
256 MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]");
258 /*****************************************************************************/
261 * Hardware ID bits for the EasyIO and ECH boards. These defines apply
262 * to the directly accessible io ports of these boards (not the uarts -
263 * they are in cd1400.h and sc26198.h).
265 #define EIO_8PORTRS 0x04
266 #define EIO_4PORTRS 0x05
267 #define EIO_8PORTDI 0x00
268 #define EIO_8PORTM 0x06
270 #define EIO_IDBITMASK 0x07
272 #define EIO_BRDMASK 0xf0
275 #define ID_BRD16 0x30
277 #define EIO_INTRPEND 0x08
278 #define EIO_INTEDGE 0x00
279 #define EIO_INTLEVEL 0x08
283 #define ECH_IDBITMASK 0xe0
284 #define ECH_BRDENABLE 0x08
285 #define ECH_BRDDISABLE 0x00
286 #define ECH_INTENABLE 0x01
287 #define ECH_INTDISABLE 0x00
288 #define ECH_INTLEVEL 0x02
289 #define ECH_INTEDGE 0x00
290 #define ECH_INTRPEND 0x01
291 #define ECH_BRDRESET 0x01
293 #define ECHMC_INTENABLE 0x01
294 #define ECHMC_BRDRESET 0x02
296 #define ECH_PNLSTATUS 2
297 #define ECH_PNL16PORT 0x20
298 #define ECH_PNLIDMASK 0x07
299 #define ECH_PNLXPID 0x40
300 #define ECH_PNLINTRPEND 0x80
302 #define ECH_ADDR2MASK 0x1e0
305 * Define the vector mapping bits for the programmable interrupt board
306 * hardware. These bits encode the interrupt for the board to use - it
307 * is software selectable (except the EIO-8M).
309 static unsigned char stl_vecmap[] = {
310 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07,
311 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03
315 * Lock ordering is that you may not take stallion_lock holding
319 static spinlock_t brd_lock; /* Guard the board mapping */
320 static spinlock_t stallion_lock; /* Guard the tty driver */
323 * Set up enable and disable macros for the ECH boards. They require
324 * the secondary io address space to be activated and deactivated.
325 * This way all ECH boards can share their secondary io region.
326 * If this is an ECH-PCI board then also need to set the page pointer
327 * to point to the correct page.
329 #define BRDENABLE(brdnr,pagenr) \
330 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
331 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \
332 stl_brds[(brdnr)]->ioctrl); \
333 else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \
334 outb((pagenr), stl_brds[(brdnr)]->ioctrl);
336 #define BRDDISABLE(brdnr) \
337 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
338 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \
339 stl_brds[(brdnr)]->ioctrl);
341 #define STL_CD1400MAXBAUD 230400
342 #define STL_SC26198MAXBAUD 460800
344 #define STL_BAUDBASE 115200
345 #define STL_CLOSEDELAY (5 * HZ / 10)
347 /*****************************************************************************/
350 * Define the Stallion PCI vendor and device IDs.
352 #ifndef PCI_VENDOR_ID_STALLION
353 #define PCI_VENDOR_ID_STALLION 0x124d
355 #ifndef PCI_DEVICE_ID_ECHPCI832
356 #define PCI_DEVICE_ID_ECHPCI832 0x0000
358 #ifndef PCI_DEVICE_ID_ECHPCI864
359 #define PCI_DEVICE_ID_ECHPCI864 0x0002
361 #ifndef PCI_DEVICE_ID_EIOPCI
362 #define PCI_DEVICE_ID_EIOPCI 0x0003
366 * Define structure to hold all Stallion PCI boards.
369 static struct pci_device_id stl_pcibrds[] = {
370 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864),
371 .driver_data = BRD_ECH64PCI },
372 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI),
373 .driver_data = BRD_EASYIOPCI },
374 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832),
375 .driver_data = BRD_ECHPCI },
376 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410),
377 .driver_data = BRD_ECHPCI },
380 MODULE_DEVICE_TABLE(pci, stl_pcibrds);
382 /*****************************************************************************/
385 * Define macros to extract a brd/port number from a minor number.
387 #define MINOR2BRD(min) (((min) & 0xc0) >> 6)
388 #define MINOR2PORT(min) ((min) & 0x3f)
391 * Define a baud rate table that converts termios baud rate selector
392 * into the actual baud rate value. All baud rate calculations are
393 * based on the actual baud rate required.
395 static unsigned int stl_baudrates[] = {
396 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
397 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
400 /*****************************************************************************/
403 * Declare all those functions in this driver!
406 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg);
407 static int stl_brdinit(struct stlbrd *brdp);
408 static int stl_getportstats(struct stlport *portp, comstats_t __user *cp);
409 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp);
410 static int stl_waitcarrier(struct stlport *portp, struct file *filp);
413 * CD1400 uart specific handling functions.
415 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value);
416 static int stl_cd1400getreg(struct stlport *portp, int regnr);
417 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value);
418 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp);
419 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
420 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp);
421 static int stl_cd1400getsignals(struct stlport *portp);
422 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts);
423 static void stl_cd1400ccrwait(struct stlport *portp);
424 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx);
425 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx);
426 static void stl_cd1400disableintrs(struct stlport *portp);
427 static void stl_cd1400sendbreak(struct stlport *portp, int len);
428 static void stl_cd1400flowctrl(struct stlport *portp, int state);
429 static void stl_cd1400sendflow(struct stlport *portp, int state);
430 static void stl_cd1400flush(struct stlport *portp);
431 static int stl_cd1400datastate(struct stlport *portp);
432 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase);
433 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase);
434 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr);
435 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr);
436 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr);
438 static inline int stl_cd1400breakisr(struct stlport *portp, int ioaddr);
441 * SC26198 uart specific handling functions.
443 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value);
444 static int stl_sc26198getreg(struct stlport *portp, int regnr);
445 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value);
446 static int stl_sc26198getglobreg(struct stlport *portp, int regnr);
447 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp);
448 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
449 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp);
450 static int stl_sc26198getsignals(struct stlport *portp);
451 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts);
452 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx);
453 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx);
454 static void stl_sc26198disableintrs(struct stlport *portp);
455 static void stl_sc26198sendbreak(struct stlport *portp, int len);
456 static void stl_sc26198flowctrl(struct stlport *portp, int state);
457 static void stl_sc26198sendflow(struct stlport *portp, int state);
458 static void stl_sc26198flush(struct stlport *portp);
459 static int stl_sc26198datastate(struct stlport *portp);
460 static void stl_sc26198wait(struct stlport *portp);
461 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty);
462 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase);
463 static void stl_sc26198txisr(struct stlport *port);
464 static void stl_sc26198rxisr(struct stlport *port, unsigned int iack);
465 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch);
466 static void stl_sc26198rxbadchars(struct stlport *portp);
467 static void stl_sc26198otherisr(struct stlport *port, unsigned int iack);
469 /*****************************************************************************/
472 * Generic UART support structure.
474 typedef struct uart {
475 int (*panelinit)(struct stlbrd *brdp, struct stlpanel *panelp);
476 void (*portinit)(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
477 void (*setport)(struct stlport *portp, struct ktermios *tiosp);
478 int (*getsignals)(struct stlport *portp);
479 void (*setsignals)(struct stlport *portp, int dtr, int rts);
480 void (*enablerxtx)(struct stlport *portp, int rx, int tx);
481 void (*startrxtx)(struct stlport *portp, int rx, int tx);
482 void (*disableintrs)(struct stlport *portp);
483 void (*sendbreak)(struct stlport *portp, int len);
484 void (*flowctrl)(struct stlport *portp, int state);
485 void (*sendflow)(struct stlport *portp, int state);
486 void (*flush)(struct stlport *portp);
487 int (*datastate)(struct stlport *portp);
488 void (*intr)(struct stlpanel *panelp, unsigned int iobase);
492 * Define some macros to make calling these functions nice and clean.
494 #define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit)
495 #define stl_portinit (* ((uart_t *) portp->uartp)->portinit)
496 #define stl_setport (* ((uart_t *) portp->uartp)->setport)
497 #define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals)
498 #define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals)
499 #define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx)
500 #define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx)
501 #define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs)
502 #define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak)
503 #define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl)
504 #define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow)
505 #define stl_flush (* ((uart_t *) portp->uartp)->flush)
506 #define stl_datastate (* ((uart_t *) portp->uartp)->datastate)
508 /*****************************************************************************/
511 * CD1400 UART specific data initialization.
513 static uart_t stl_cd1400uart = {
517 stl_cd1400getsignals,
518 stl_cd1400setsignals,
519 stl_cd1400enablerxtx,
521 stl_cd1400disableintrs,
531 * Define the offsets within the register bank of a cd1400 based panel.
532 * These io address offsets are common to the EasyIO board as well.
540 #define EREG_BANKSIZE 8
542 #define CD1400_CLK 25000000
543 #define CD1400_CLK8M 20000000
546 * Define the cd1400 baud rate clocks. These are used when calculating
547 * what clock and divisor to use for the required baud rate. Also
548 * define the maximum baud rate allowed, and the default base baud.
550 static int stl_cd1400clkdivs[] = {
551 CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4
554 /*****************************************************************************/
557 * SC26198 UART specific data initization.
559 static uart_t stl_sc26198uart = {
560 stl_sc26198panelinit,
563 stl_sc26198getsignals,
564 stl_sc26198setsignals,
565 stl_sc26198enablerxtx,
566 stl_sc26198startrxtx,
567 stl_sc26198disableintrs,
568 stl_sc26198sendbreak,
572 stl_sc26198datastate,
577 * Define the offsets within the register bank of a sc26198 based panel.
585 #define XP_BANKSIZE 4
588 * Define the sc26198 baud rate table. Offsets within the table
589 * represent the actual baud rate selector of sc26198 registers.
591 static unsigned int sc26198_baudtable[] = {
592 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600,
593 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200,
594 230400, 460800, 921600
597 #define SC26198_NRBAUDS ARRAY_SIZE(sc26198_baudtable)
599 /*****************************************************************************/
602 * Define the driver info for a user level control device. Used mainly
603 * to get at port stats - only not using the port device itself.
605 static const struct file_operations stl_fsiomem = {
606 .owner = THIS_MODULE,
607 .ioctl = stl_memioctl,
610 static struct class *stallion_class;
612 static void stl_cd_change(struct stlport *portp)
614 unsigned int oldsigs = portp->sigs;
616 if (!portp->port.tty)
619 portp->sigs = stl_getsignals(portp);
621 if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0))
622 wake_up_interruptible(&portp->port.open_wait);
624 if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0))
625 if (portp->port.flags & ASYNC_CHECK_CD)
626 tty_hangup(portp->port.tty);
630 * Check for any arguments passed in on the module load command line.
633 /*****************************************************************************/
636 * Parse the supplied argument string, into the board conf struct.
639 static int __init stl_parsebrd(struct stlconf *confp, char **argp)
644 pr_debug("stl_parsebrd(confp=%p,argp=%p)\n", confp, argp);
646 if ((argp[0] == NULL) || (*argp[0] == 0))
649 for (sp = argp[0], i = 0; (*sp != 0) && (i < 25); sp++, i++)
652 for (i = 0; i < ARRAY_SIZE(stl_brdstr); i++)
653 if (strcmp(stl_brdstr[i].name, argp[0]) == 0)
656 if (i == ARRAY_SIZE(stl_brdstr)) {
657 printk("STALLION: unknown board name, %s?\n", argp[0]);
661 confp->brdtype = stl_brdstr[i].type;
664 if ((argp[i] != NULL) && (*argp[i] != 0))
665 confp->ioaddr1 = simple_strtoul(argp[i], NULL, 0);
667 if (confp->brdtype == BRD_ECH) {
668 if ((argp[i] != NULL) && (*argp[i] != 0))
669 confp->ioaddr2 = simple_strtoul(argp[i], NULL, 0);
672 if ((argp[i] != NULL) && (*argp[i] != 0))
673 confp->irq = simple_strtoul(argp[i], NULL, 0);
677 /*****************************************************************************/
680 * Allocate a new board structure. Fill out the basic info in it.
683 static struct stlbrd *stl_allocbrd(void)
687 brdp = kzalloc(sizeof(struct stlbrd), GFP_KERNEL);
689 printk("STALLION: failed to allocate memory (size=%Zd)\n",
690 sizeof(struct stlbrd));
694 brdp->magic = STL_BOARDMAGIC;
698 /*****************************************************************************/
700 static int stl_open(struct tty_struct *tty, struct file *filp)
702 struct stlport *portp;
704 unsigned int minordev, brdnr, panelnr;
707 pr_debug("stl_open(tty=%p,filp=%p): device=%s\n", tty, filp, tty->name);
709 minordev = tty->index;
710 brdnr = MINOR2BRD(minordev);
711 if (brdnr >= stl_nrbrds)
713 brdp = stl_brds[brdnr];
716 minordev = MINOR2PORT(minordev);
717 for (portnr = -1, panelnr = 0; panelnr < STL_MAXPANELS; panelnr++) {
718 if (brdp->panels[panelnr] == NULL)
720 if (minordev < brdp->panels[panelnr]->nrports) {
724 minordev -= brdp->panels[panelnr]->nrports;
729 portp = brdp->panels[panelnr]->ports[portnr];
734 * On the first open of the device setup the port hardware, and
735 * initialize the per port data structure.
737 portp->port.tty = tty;
738 tty->driver_data = portp;
741 if ((portp->port.flags & ASYNC_INITIALIZED) == 0) {
742 if (!portp->tx.buf) {
743 portp->tx.buf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL);
746 portp->tx.head = portp->tx.buf;
747 portp->tx.tail = portp->tx.buf;
749 stl_setport(portp, tty->termios);
750 portp->sigs = stl_getsignals(portp);
751 stl_setsignals(portp, 1, 1);
752 stl_enablerxtx(portp, 1, 1);
753 stl_startrxtx(portp, 1, 0);
754 clear_bit(TTY_IO_ERROR, &tty->flags);
755 portp->port.flags |= ASYNC_INITIALIZED;
759 * Check if this port is in the middle of closing. If so then wait
760 * until it is closed then return error status, based on flag settings.
761 * The sleep here does not need interrupt protection since the wakeup
762 * for it is done with the same context.
764 if (portp->port.flags & ASYNC_CLOSING) {
765 interruptible_sleep_on(&portp->port.close_wait);
766 if (portp->port.flags & ASYNC_HUP_NOTIFY)
772 * Based on type of open being done check if it can overlap with any
773 * previous opens still in effect. If we are a normal serial device
774 * then also we might have to wait for carrier.
776 if (!(filp->f_flags & O_NONBLOCK))
777 if ((rc = stl_waitcarrier(portp, filp)) != 0)
780 portp->port.flags |= ASYNC_NORMAL_ACTIVE;
785 /*****************************************************************************/
788 * Possibly need to wait for carrier (DCD signal) to come high. Say
789 * maybe because if we are clocal then we don't need to wait...
792 static int stl_waitcarrier(struct stlport *portp, struct file *filp)
797 pr_debug("stl_waitcarrier(portp=%p,filp=%p)\n", portp, filp);
802 spin_lock_irqsave(&stallion_lock, flags);
804 if (portp->port.tty->termios->c_cflag & CLOCAL)
807 portp->openwaitcnt++;
808 if (! tty_hung_up_p(filp))
812 /* Takes brd_lock internally */
813 stl_setsignals(portp, 1, 1);
814 if (tty_hung_up_p(filp) ||
815 ((portp->port.flags & ASYNC_INITIALIZED) == 0)) {
816 if (portp->port.flags & ASYNC_HUP_NOTIFY)
822 if (((portp->port.flags & ASYNC_CLOSING) == 0) &&
823 (doclocal || (portp->sigs & TIOCM_CD)))
825 if (signal_pending(current)) {
830 interruptible_sleep_on(&portp->port.open_wait);
833 if (! tty_hung_up_p(filp))
835 portp->openwaitcnt--;
836 spin_unlock_irqrestore(&stallion_lock, flags);
841 /*****************************************************************************/
843 static void stl_flushbuffer(struct tty_struct *tty)
845 struct stlport *portp;
847 pr_debug("stl_flushbuffer(tty=%p)\n", tty);
851 portp = tty->driver_data;
859 /*****************************************************************************/
861 static void stl_waituntilsent(struct tty_struct *tty, int timeout)
863 struct stlport *portp;
866 pr_debug("stl_waituntilsent(tty=%p,timeout=%d)\n", tty, timeout);
870 portp = tty->driver_data;
876 tend = jiffies + timeout;
879 while (stl_datastate(portp)) {
880 if (signal_pending(current))
882 msleep_interruptible(20);
883 if (time_after_eq(jiffies, tend))
889 /*****************************************************************************/
891 static void stl_close(struct tty_struct *tty, struct file *filp)
893 struct stlport *portp;
896 pr_debug("stl_close(tty=%p,filp=%p)\n", tty, filp);
898 portp = tty->driver_data;
902 spin_lock_irqsave(&stallion_lock, flags);
903 if (tty_hung_up_p(filp)) {
904 spin_unlock_irqrestore(&stallion_lock, flags);
907 if ((tty->count == 1) && (portp->port.count != 1))
908 portp->port.count = 1;
909 if (portp->port.count-- > 1) {
910 spin_unlock_irqrestore(&stallion_lock, flags);
914 portp->port.count = 0;
915 portp->port.flags |= ASYNC_CLOSING;
918 * May want to wait for any data to drain before closing. The BUSY
919 * flag keeps track of whether we are still sending or not - it is
920 * very accurate for the cd1400, not quite so for the sc26198.
921 * (The sc26198 has no "end-of-data" interrupt only empty FIFO)
925 spin_unlock_irqrestore(&stallion_lock, flags);
927 if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
928 tty_wait_until_sent(tty, portp->closing_wait);
929 stl_waituntilsent(tty, (HZ / 2));
932 spin_lock_irqsave(&stallion_lock, flags);
933 portp->port.flags &= ~ASYNC_INITIALIZED;
934 spin_unlock_irqrestore(&stallion_lock, flags);
936 stl_disableintrs(portp);
937 if (tty->termios->c_cflag & HUPCL)
938 stl_setsignals(portp, 0, 0);
939 stl_enablerxtx(portp, 0, 0);
940 stl_flushbuffer(tty);
942 if (portp->tx.buf != NULL) {
943 kfree(portp->tx.buf);
944 portp->tx.buf = NULL;
945 portp->tx.head = NULL;
946 portp->tx.tail = NULL;
948 set_bit(TTY_IO_ERROR, &tty->flags);
949 tty_ldisc_flush(tty);
952 portp->port.tty = NULL;
954 if (portp->openwaitcnt) {
955 if (portp->close_delay)
956 msleep_interruptible(jiffies_to_msecs(portp->close_delay));
957 wake_up_interruptible(&portp->port.open_wait);
960 portp->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
961 wake_up_interruptible(&portp->port.close_wait);
964 /*****************************************************************************/
967 * Write routine. Take data and stuff it in to the TX ring queue.
968 * If transmit interrupts are not running then start them.
971 static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count)
973 struct stlport *portp;
974 unsigned int len, stlen;
975 unsigned char *chbuf;
978 pr_debug("stl_write(tty=%p,buf=%p,count=%d)\n", tty, buf, count);
980 portp = tty->driver_data;
983 if (portp->tx.buf == NULL)
987 * If copying direct from user space we must cater for page faults,
988 * causing us to "sleep" here for a while. To handle this copy in all
989 * the data we need now, into a local buffer. Then when we got it all
990 * copy it into the TX buffer.
992 chbuf = (unsigned char *) buf;
994 head = portp->tx.head;
995 tail = portp->tx.tail;
997 len = STL_TXBUFSIZE - (head - tail) - 1;
998 stlen = STL_TXBUFSIZE - (head - portp->tx.buf);
1000 len = tail - head - 1;
1004 len = min(len, (unsigned int)count);
1007 stlen = min(len, stlen);
1008 memcpy(head, chbuf, stlen);
1013 if (head >= (portp->tx.buf + STL_TXBUFSIZE)) {
1014 head = portp->tx.buf;
1015 stlen = tail - head;
1018 portp->tx.head = head;
1020 clear_bit(ASYI_TXLOW, &portp->istate);
1021 stl_startrxtx(portp, -1, 1);
1026 /*****************************************************************************/
1028 static int stl_putchar(struct tty_struct *tty, unsigned char ch)
1030 struct stlport *portp;
1034 pr_debug("stl_putchar(tty=%p,ch=%x)\n", tty, ch);
1038 portp = tty->driver_data;
1041 if (portp->tx.buf == NULL)
1044 head = portp->tx.head;
1045 tail = portp->tx.tail;
1047 len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head);
1052 if (head >= (portp->tx.buf + STL_TXBUFSIZE))
1053 head = portp->tx.buf;
1055 portp->tx.head = head;
1059 /*****************************************************************************/
1062 * If there are any characters in the buffer then make sure that TX
1063 * interrupts are on and get'em out. Normally used after the putchar
1064 * routine has been called.
1067 static void stl_flushchars(struct tty_struct *tty)
1069 struct stlport *portp;
1071 pr_debug("stl_flushchars(tty=%p)\n", tty);
1075 portp = tty->driver_data;
1078 if (portp->tx.buf == NULL)
1081 stl_startrxtx(portp, -1, 1);
1084 /*****************************************************************************/
1086 static int stl_writeroom(struct tty_struct *tty)
1088 struct stlport *portp;
1091 pr_debug("stl_writeroom(tty=%p)\n", tty);
1095 portp = tty->driver_data;
1098 if (portp->tx.buf == NULL)
1101 head = portp->tx.head;
1102 tail = portp->tx.tail;
1103 return (head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1);
1106 /*****************************************************************************/
1109 * Return number of chars in the TX buffer. Normally we would just
1110 * calculate the number of chars in the buffer and return that, but if
1111 * the buffer is empty and TX interrupts are still on then we return
1112 * that the buffer still has 1 char in it. This way whoever called us
1113 * will not think that ALL chars have drained - since the UART still
1114 * must have some chars in it (we are busy after all).
1117 static int stl_charsinbuffer(struct tty_struct *tty)
1119 struct stlport *portp;
1123 pr_debug("stl_charsinbuffer(tty=%p)\n", tty);
1127 portp = tty->driver_data;
1130 if (portp->tx.buf == NULL)
1133 head = portp->tx.head;
1134 tail = portp->tx.tail;
1135 size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
1136 if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate))
1141 /*****************************************************************************/
1144 * Generate the serial struct info.
1147 static int stl_getserial(struct stlport *portp, struct serial_struct __user *sp)
1149 struct serial_struct sio;
1150 struct stlbrd *brdp;
1152 pr_debug("stl_getserial(portp=%p,sp=%p)\n", portp, sp);
1154 memset(&sio, 0, sizeof(struct serial_struct));
1155 sio.line = portp->portnr;
1156 sio.port = portp->ioaddr;
1157 sio.flags = portp->port.flags;
1158 sio.baud_base = portp->baud_base;
1159 sio.close_delay = portp->close_delay;
1160 sio.closing_wait = portp->closing_wait;
1161 sio.custom_divisor = portp->custom_divisor;
1163 if (portp->uartp == &stl_cd1400uart) {
1164 sio.type = PORT_CIRRUS;
1165 sio.xmit_fifo_size = CD1400_TXFIFOSIZE;
1167 sio.type = PORT_UNKNOWN;
1168 sio.xmit_fifo_size = SC26198_TXFIFOSIZE;
1171 brdp = stl_brds[portp->brdnr];
1173 sio.irq = brdp->irq;
1175 return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0;
1178 /*****************************************************************************/
1181 * Set port according to the serial struct info.
1182 * At this point we do not do any auto-configure stuff, so we will
1183 * just quietly ignore any requests to change irq, etc.
1186 static int stl_setserial(struct stlport *portp, struct serial_struct __user *sp)
1188 struct serial_struct sio;
1190 pr_debug("stl_setserial(portp=%p,sp=%p)\n", portp, sp);
1192 if (copy_from_user(&sio, sp, sizeof(struct serial_struct)))
1194 if (!capable(CAP_SYS_ADMIN)) {
1195 if ((sio.baud_base != portp->baud_base) ||
1196 (sio.close_delay != portp->close_delay) ||
1197 ((sio.flags & ~ASYNC_USR_MASK) !=
1198 (portp->port.flags & ~ASYNC_USR_MASK)))
1202 portp->port.flags = (portp->port.flags & ~ASYNC_USR_MASK) |
1203 (sio.flags & ASYNC_USR_MASK);
1204 portp->baud_base = sio.baud_base;
1205 portp->close_delay = sio.close_delay;
1206 portp->closing_wait = sio.closing_wait;
1207 portp->custom_divisor = sio.custom_divisor;
1208 stl_setport(portp, portp->port.tty->termios);
1212 /*****************************************************************************/
1214 static int stl_tiocmget(struct tty_struct *tty, struct file *file)
1216 struct stlport *portp;
1220 portp = tty->driver_data;
1223 if (tty->flags & (1 << TTY_IO_ERROR))
1226 return stl_getsignals(portp);
1229 static int stl_tiocmset(struct tty_struct *tty, struct file *file,
1230 unsigned int set, unsigned int clear)
1232 struct stlport *portp;
1233 int rts = -1, dtr = -1;
1237 portp = tty->driver_data;
1240 if (tty->flags & (1 << TTY_IO_ERROR))
1243 if (set & TIOCM_RTS)
1245 if (set & TIOCM_DTR)
1247 if (clear & TIOCM_RTS)
1249 if (clear & TIOCM_DTR)
1252 stl_setsignals(portp, dtr, rts);
1256 static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1258 struct stlport *portp;
1261 void __user *argp = (void __user *)arg;
1263 pr_debug("stl_ioctl(tty=%p,file=%p,cmd=%x,arg=%lx)\n", tty, file, cmd,
1268 portp = tty->driver_data;
1272 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1273 (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS))
1274 if (tty->flags & (1 << TTY_IO_ERROR))
1283 rc = stl_getserial(portp, argp);
1286 rc = stl_setserial(portp, argp);
1288 case COM_GETPORTSTATS:
1289 rc = stl_getportstats(portp, argp);
1291 case COM_CLRPORTSTATS:
1292 rc = stl_clrportstats(portp, argp);
1298 case TIOCSERGSTRUCT:
1299 case TIOCSERGETMULTI:
1300 case TIOCSERSETMULTI:
1309 /*****************************************************************************/
1312 * Start the transmitter again. Just turn TX interrupts back on.
1315 static void stl_start(struct tty_struct *tty)
1317 struct stlport *portp;
1319 pr_debug("stl_start(tty=%p)\n", tty);
1323 portp = tty->driver_data;
1326 stl_startrxtx(portp, -1, 1);
1329 /*****************************************************************************/
1331 static void stl_settermios(struct tty_struct *tty, struct ktermios *old)
1333 struct stlport *portp;
1334 struct ktermios *tiosp;
1336 pr_debug("stl_settermios(tty=%p,old=%p)\n", tty, old);
1340 portp = tty->driver_data;
1344 tiosp = tty->termios;
1345 if ((tiosp->c_cflag == old->c_cflag) &&
1346 (tiosp->c_iflag == old->c_iflag))
1349 stl_setport(portp, tiosp);
1350 stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0),
1352 if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) {
1353 tty->hw_stopped = 0;
1356 if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
1357 wake_up_interruptible(&portp->port.open_wait);
1360 /*****************************************************************************/
1363 * Attempt to flow control who ever is sending us data. Based on termios
1364 * settings use software or/and hardware flow control.
1367 static void stl_throttle(struct tty_struct *tty)
1369 struct stlport *portp;
1371 pr_debug("stl_throttle(tty=%p)\n", tty);
1375 portp = tty->driver_data;
1378 stl_flowctrl(portp, 0);
1381 /*****************************************************************************/
1384 * Unflow control the device sending us data...
1387 static void stl_unthrottle(struct tty_struct *tty)
1389 struct stlport *portp;
1391 pr_debug("stl_unthrottle(tty=%p)\n", tty);
1395 portp = tty->driver_data;
1398 stl_flowctrl(portp, 1);
1401 /*****************************************************************************/
1404 * Stop the transmitter. Basically to do this we will just turn TX
1408 static void stl_stop(struct tty_struct *tty)
1410 struct stlport *portp;
1412 pr_debug("stl_stop(tty=%p)\n", tty);
1416 portp = tty->driver_data;
1419 stl_startrxtx(portp, -1, 0);
1422 /*****************************************************************************/
1425 * Hangup this port. This is pretty much like closing the port, only
1426 * a little more brutal. No waiting for data to drain. Shutdown the
1427 * port and maybe drop signals.
1430 static void stl_hangup(struct tty_struct *tty)
1432 struct stlport *portp;
1434 pr_debug("stl_hangup(tty=%p)\n", tty);
1438 portp = tty->driver_data;
1442 portp->port.flags &= ~ASYNC_INITIALIZED;
1443 stl_disableintrs(portp);
1444 if (tty->termios->c_cflag & HUPCL)
1445 stl_setsignals(portp, 0, 0);
1446 stl_enablerxtx(portp, 0, 0);
1447 stl_flushbuffer(tty);
1449 set_bit(TTY_IO_ERROR, &tty->flags);
1450 if (portp->tx.buf != NULL) {
1451 kfree(portp->tx.buf);
1452 portp->tx.buf = NULL;
1453 portp->tx.head = NULL;
1454 portp->tx.tail = NULL;
1456 portp->port.tty = NULL;
1457 portp->port.flags &= ~ASYNC_NORMAL_ACTIVE;
1458 portp->port.count = 0;
1459 wake_up_interruptible(&portp->port.open_wait);
1462 /*****************************************************************************/
1464 static int stl_breakctl(struct tty_struct *tty, int state)
1466 struct stlport *portp;
1468 pr_debug("stl_breakctl(tty=%p,state=%d)\n", tty, state);
1472 portp = tty->driver_data;
1476 stl_sendbreak(portp, ((state == -1) ? 1 : 2));
1480 /*****************************************************************************/
1482 static void stl_sendxchar(struct tty_struct *tty, char ch)
1484 struct stlport *portp;
1486 pr_debug("stl_sendxchar(tty=%p,ch=%x)\n", tty, ch);
1490 portp = tty->driver_data;
1494 if (ch == STOP_CHAR(tty))
1495 stl_sendflow(portp, 0);
1496 else if (ch == START_CHAR(tty))
1497 stl_sendflow(portp, 1);
1499 stl_putchar(tty, ch);
1502 /*****************************************************************************/
1507 * Format info for a specified port. The line is deliberately limited
1508 * to 80 characters. (If it is too long it will be truncated, if too
1509 * short then padded with spaces).
1512 static int stl_portinfo(struct stlport *portp, int portnr, char *pos)
1518 sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d",
1519 portnr, (portp->hwid == 1) ? "SC26198" : "CD1400",
1520 (int) portp->stats.txtotal, (int) portp->stats.rxtotal);
1522 if (portp->stats.rxframing)
1523 sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing);
1524 if (portp->stats.rxparity)
1525 sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity);
1526 if (portp->stats.rxbreaks)
1527 sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks);
1528 if (portp->stats.rxoverrun)
1529 sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun);
1531 sigs = stl_getsignals(portp);
1532 cnt = sprintf(sp, "%s%s%s%s%s ",
1533 (sigs & TIOCM_RTS) ? "|RTS" : "",
1534 (sigs & TIOCM_CTS) ? "|CTS" : "",
1535 (sigs & TIOCM_DTR) ? "|DTR" : "",
1536 (sigs & TIOCM_CD) ? "|DCD" : "",
1537 (sigs & TIOCM_DSR) ? "|DSR" : "");
1541 for (cnt = sp - pos; cnt < (MAXLINE - 1); cnt++)
1544 pos[(MAXLINE - 2)] = '+';
1545 pos[(MAXLINE - 1)] = '\n';
1550 /*****************************************************************************/
1553 * Port info, read from the /proc file system.
1556 static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data)
1558 struct stlbrd *brdp;
1559 struct stlpanel *panelp;
1560 struct stlport *portp;
1561 unsigned int brdnr, panelnr, portnr;
1562 int totalport, curoff, maxoff;
1565 pr_debug("stl_readproc(page=%p,start=%p,off=%lx,count=%d,eof=%p,"
1566 "data=%p\n", page, start, off, count, eof, data);
1573 pos += sprintf(pos, "%s: version %s", stl_drvtitle,
1575 while (pos < (page + MAXLINE - 1))
1582 * We scan through for each board, panel and port. The offset is
1583 * calculated on the fly, and irrelevant ports are skipped.
1585 for (brdnr = 0; brdnr < stl_nrbrds; brdnr++) {
1586 brdp = stl_brds[brdnr];
1589 if (brdp->state == 0)
1592 maxoff = curoff + (brdp->nrports * MAXLINE);
1593 if (off >= maxoff) {
1598 totalport = brdnr * STL_MAXPORTS;
1599 for (panelnr = 0; panelnr < brdp->nrpanels; panelnr++) {
1600 panelp = brdp->panels[panelnr];
1604 maxoff = curoff + (panelp->nrports * MAXLINE);
1605 if (off >= maxoff) {
1607 totalport += panelp->nrports;
1611 for (portnr = 0; portnr < panelp->nrports; portnr++,
1613 portp = panelp->ports[portnr];
1616 if (off >= (curoff += MAXLINE))
1618 if ((pos - page + MAXLINE) > count)
1620 pos += stl_portinfo(portp, totalport, pos);
1632 /*****************************************************************************/
1635 * All board interrupts are vectored through here first. This code then
1636 * calls off to the approrpriate board interrupt handlers.
1639 static irqreturn_t stl_intr(int irq, void *dev_id)
1641 struct stlbrd *brdp = dev_id;
1643 pr_debug("stl_intr(brdp=%p,irq=%d)\n", brdp, brdp->irq);
1645 return IRQ_RETVAL((* brdp->isr)(brdp));
1648 /*****************************************************************************/
1651 * Interrupt service routine for EasyIO board types.
1654 static int stl_eiointr(struct stlbrd *brdp)
1656 struct stlpanel *panelp;
1657 unsigned int iobase;
1660 spin_lock(&brd_lock);
1661 panelp = brdp->panels[0];
1662 iobase = panelp->iobase;
1663 while (inb(brdp->iostatus) & EIO_INTRPEND) {
1665 (* panelp->isr)(panelp, iobase);
1667 spin_unlock(&brd_lock);
1671 /*****************************************************************************/
1674 * Interrupt service routine for ECH-AT board types.
1677 static int stl_echatintr(struct stlbrd *brdp)
1679 struct stlpanel *panelp;
1680 unsigned int ioaddr, bnknr;
1683 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
1685 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1687 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1688 ioaddr = brdp->bnkstataddr[bnknr];
1689 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1690 panelp = brdp->bnk2panel[bnknr];
1691 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1696 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
1701 /*****************************************************************************/
1704 * Interrupt service routine for ECH-MCA board types.
1707 static int stl_echmcaintr(struct stlbrd *brdp)
1709 struct stlpanel *panelp;
1710 unsigned int ioaddr, bnknr;
1713 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1715 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1716 ioaddr = brdp->bnkstataddr[bnknr];
1717 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1718 panelp = brdp->bnk2panel[bnknr];
1719 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1726 /*****************************************************************************/
1729 * Interrupt service routine for ECH-PCI board types.
1732 static int stl_echpciintr(struct stlbrd *brdp)
1734 struct stlpanel *panelp;
1735 unsigned int ioaddr, bnknr, recheck;
1740 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1741 outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl);
1742 ioaddr = brdp->bnkstataddr[bnknr];
1743 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1744 panelp = brdp->bnk2panel[bnknr];
1745 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1756 /*****************************************************************************/
1759 * Interrupt service routine for ECH-8/64-PCI board types.
1762 static int stl_echpci64intr(struct stlbrd *brdp)
1764 struct stlpanel *panelp;
1765 unsigned int ioaddr, bnknr;
1768 while (inb(brdp->ioctrl) & 0x1) {
1770 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1771 ioaddr = brdp->bnkstataddr[bnknr];
1772 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1773 panelp = brdp->bnk2panel[bnknr];
1774 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1782 /*****************************************************************************/
1785 * Initialize all the ports on a panel.
1788 static int __devinit stl_initports(struct stlbrd *brdp, struct stlpanel *panelp)
1790 struct stlport *portp;
1794 pr_debug("stl_initports(brdp=%p,panelp=%p)\n", brdp, panelp);
1796 chipmask = stl_panelinit(brdp, panelp);
1799 * All UART's are initialized (if found!). Now go through and setup
1800 * each ports data structures.
1802 for (i = 0; i < panelp->nrports; i++) {
1803 portp = kzalloc(sizeof(struct stlport), GFP_KERNEL);
1805 printk("STALLION: failed to allocate memory "
1806 "(size=%Zd)\n", sizeof(struct stlport));
1810 portp->magic = STL_PORTMAGIC;
1812 portp->brdnr = panelp->brdnr;
1813 portp->panelnr = panelp->panelnr;
1814 portp->uartp = panelp->uartp;
1815 portp->clk = brdp->clk;
1816 portp->baud_base = STL_BAUDBASE;
1817 portp->close_delay = STL_CLOSEDELAY;
1818 portp->closing_wait = 30 * HZ;
1819 init_waitqueue_head(&portp->port.open_wait);
1820 init_waitqueue_head(&portp->port.close_wait);
1821 portp->stats.brd = portp->brdnr;
1822 portp->stats.panel = portp->panelnr;
1823 portp->stats.port = portp->portnr;
1824 panelp->ports[i] = portp;
1825 stl_portinit(brdp, panelp, portp);
1831 static void stl_cleanup_panels(struct stlbrd *brdp)
1833 struct stlpanel *panelp;
1834 struct stlport *portp;
1837 for (j = 0; j < STL_MAXPANELS; j++) {
1838 panelp = brdp->panels[j];
1841 for (k = 0; k < STL_PORTSPERPANEL; k++) {
1842 portp = panelp->ports[k];
1845 if (portp->port.tty != NULL)
1846 stl_hangup(portp->port.tty);
1847 kfree(portp->tx.buf);
1854 /*****************************************************************************/
1857 * Try to find and initialize an EasyIO board.
1860 static int __devinit stl_initeio(struct stlbrd *brdp)
1862 struct stlpanel *panelp;
1863 unsigned int status;
1867 pr_debug("stl_initeio(brdp=%p)\n", brdp);
1869 brdp->ioctrl = brdp->ioaddr1 + 1;
1870 brdp->iostatus = brdp->ioaddr1 + 2;
1872 status = inb(brdp->iostatus);
1873 if ((status & EIO_IDBITMASK) == EIO_MK3)
1877 * Handle board specific stuff now. The real difference is PCI
1880 if (brdp->brdtype == BRD_EASYIOPCI) {
1881 brdp->iosize1 = 0x80;
1882 brdp->iosize2 = 0x80;
1883 name = "serial(EIO-PCI)";
1884 outb(0x41, (brdp->ioaddr2 + 0x4c));
1887 name = "serial(EIO)";
1888 if ((brdp->irq < 0) || (brdp->irq > 15) ||
1889 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
1890 printk("STALLION: invalid irq=%d for brd=%d\n",
1891 brdp->irq, brdp->brdnr);
1895 outb((stl_vecmap[brdp->irq] | EIO_0WS |
1896 ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)),
1901 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
1902 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
1903 "%x conflicts with another device\n", brdp->brdnr,
1908 if (brdp->iosize2 > 0)
1909 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
1910 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
1911 "address %x conflicts with another device\n",
1912 brdp->brdnr, brdp->ioaddr2);
1913 printk(KERN_WARNING "STALLION: Warning, also "
1914 "releasing board %d I/O address %x \n",
1915 brdp->brdnr, brdp->ioaddr1);
1920 * Everything looks OK, so let's go ahead and probe for the hardware.
1922 brdp->clk = CD1400_CLK;
1923 brdp->isr = stl_eiointr;
1926 switch (status & EIO_IDBITMASK) {
1928 brdp->clk = CD1400_CLK8M;
1938 switch (status & EIO_BRDMASK) {
1957 * We have verified that the board is actually present, so now we
1958 * can complete the setup.
1961 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
1963 printk(KERN_WARNING "STALLION: failed to allocate memory "
1964 "(size=%Zd)\n", sizeof(struct stlpanel));
1969 panelp->magic = STL_PANELMAGIC;
1970 panelp->brdnr = brdp->brdnr;
1971 panelp->panelnr = 0;
1972 panelp->nrports = brdp->nrports;
1973 panelp->iobase = brdp->ioaddr1;
1974 panelp->hwid = status;
1975 if ((status & EIO_IDBITMASK) == EIO_MK3) {
1976 panelp->uartp = &stl_sc26198uart;
1977 panelp->isr = stl_sc26198intr;
1979 panelp->uartp = &stl_cd1400uart;
1980 panelp->isr = stl_cd1400eiointr;
1983 brdp->panels[0] = panelp;
1985 brdp->state |= BRD_FOUND;
1986 brdp->hwid = status;
1987 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
1988 printk("STALLION: failed to register interrupt "
1989 "routine for %s irq=%d\n", name, brdp->irq);
1996 stl_cleanup_panels(brdp);
1998 if (brdp->iosize2 > 0)
1999 release_region(brdp->ioaddr2, brdp->iosize2);
2001 release_region(brdp->ioaddr1, brdp->iosize1);
2006 /*****************************************************************************/
2009 * Try to find an ECH board and initialize it. This code is capable of
2010 * dealing with all types of ECH board.
2013 static int __devinit stl_initech(struct stlbrd *brdp)
2015 struct stlpanel *panelp;
2016 unsigned int status, nxtid, ioaddr, conflict, panelnr, banknr, i;
2020 pr_debug("stl_initech(brdp=%p)\n", brdp);
2026 * Set up the initial board register contents for boards. This varies a
2027 * bit between the different board types. So we need to handle each
2028 * separately. Also do a check that the supplied IRQ is good.
2030 switch (brdp->brdtype) {
2033 brdp->isr = stl_echatintr;
2034 brdp->ioctrl = brdp->ioaddr1 + 1;
2035 brdp->iostatus = brdp->ioaddr1 + 1;
2036 status = inb(brdp->iostatus);
2037 if ((status & ECH_IDBITMASK) != ECH_ID) {
2041 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2042 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2043 printk("STALLION: invalid irq=%d for brd=%d\n",
2044 brdp->irq, brdp->brdnr);
2048 status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1);
2049 status |= (stl_vecmap[brdp->irq] << 1);
2050 outb((status | ECH_BRDRESET), brdp->ioaddr1);
2051 brdp->ioctrlval = ECH_INTENABLE |
2052 ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE);
2053 for (i = 0; i < 10; i++)
2054 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
2057 name = "serial(EC8/32)";
2058 outb(status, brdp->ioaddr1);
2062 brdp->isr = stl_echmcaintr;
2063 brdp->ioctrl = brdp->ioaddr1 + 0x20;
2064 brdp->iostatus = brdp->ioctrl;
2065 status = inb(brdp->iostatus);
2066 if ((status & ECH_IDBITMASK) != ECH_ID) {
2070 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2071 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2072 printk("STALLION: invalid irq=%d for brd=%d\n",
2073 brdp->irq, brdp->brdnr);
2077 outb(ECHMC_BRDRESET, brdp->ioctrl);
2078 outb(ECHMC_INTENABLE, brdp->ioctrl);
2080 name = "serial(EC8/32-MC)";
2084 brdp->isr = stl_echpciintr;
2085 brdp->ioctrl = brdp->ioaddr1 + 2;
2088 name = "serial(EC8/32-PCI)";
2092 brdp->isr = stl_echpci64intr;
2093 brdp->ioctrl = brdp->ioaddr2 + 0x40;
2094 outb(0x43, (brdp->ioaddr1 + 0x4c));
2095 brdp->iosize1 = 0x80;
2096 brdp->iosize2 = 0x80;
2097 name = "serial(EC8/64-PCI)";
2101 printk("STALLION: unknown board type=%d\n", brdp->brdtype);
2107 * Check boards for possible IO address conflicts and return fail status
2108 * if an IO conflict found.
2111 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
2112 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
2113 "%x conflicts with another device\n", brdp->brdnr,
2118 if (brdp->iosize2 > 0)
2119 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
2120 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
2121 "address %x conflicts with another device\n",
2122 brdp->brdnr, brdp->ioaddr2);
2123 printk(KERN_WARNING "STALLION: Warning, also "
2124 "releasing board %d I/O address %x \n",
2125 brdp->brdnr, brdp->ioaddr1);
2130 * Scan through the secondary io address space looking for panels.
2131 * As we find'em allocate and initialize panel structures for each.
2133 brdp->clk = CD1400_CLK;
2134 brdp->hwid = status;
2136 ioaddr = brdp->ioaddr2;
2141 for (i = 0; i < STL_MAXPANELS; i++) {
2142 if (brdp->brdtype == BRD_ECHPCI) {
2143 outb(nxtid, brdp->ioctrl);
2144 ioaddr = brdp->ioaddr2;
2146 status = inb(ioaddr + ECH_PNLSTATUS);
2147 if ((status & ECH_PNLIDMASK) != nxtid)
2149 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
2151 printk("STALLION: failed to allocate memory "
2152 "(size=%Zd)\n", sizeof(struct stlpanel));
2156 panelp->magic = STL_PANELMAGIC;
2157 panelp->brdnr = brdp->brdnr;
2158 panelp->panelnr = panelnr;
2159 panelp->iobase = ioaddr;
2160 panelp->pagenr = nxtid;
2161 panelp->hwid = status;
2162 brdp->bnk2panel[banknr] = panelp;
2163 brdp->bnkpageaddr[banknr] = nxtid;
2164 brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS;
2166 if (status & ECH_PNLXPID) {
2167 panelp->uartp = &stl_sc26198uart;
2168 panelp->isr = stl_sc26198intr;
2169 if (status & ECH_PNL16PORT) {
2170 panelp->nrports = 16;
2171 brdp->bnk2panel[banknr] = panelp;
2172 brdp->bnkpageaddr[banknr] = nxtid;
2173 brdp->bnkstataddr[banknr++] = ioaddr + 4 +
2176 panelp->nrports = 8;
2178 panelp->uartp = &stl_cd1400uart;
2179 panelp->isr = stl_cd1400echintr;
2180 if (status & ECH_PNL16PORT) {
2181 panelp->nrports = 16;
2182 panelp->ackmask = 0x80;
2183 if (brdp->brdtype != BRD_ECHPCI)
2184 ioaddr += EREG_BANKSIZE;
2185 brdp->bnk2panel[banknr] = panelp;
2186 brdp->bnkpageaddr[banknr] = ++nxtid;
2187 brdp->bnkstataddr[banknr++] = ioaddr +
2190 panelp->nrports = 8;
2191 panelp->ackmask = 0xc0;
2196 ioaddr += EREG_BANKSIZE;
2197 brdp->nrports += panelp->nrports;
2198 brdp->panels[panelnr++] = panelp;
2199 if ((brdp->brdtype != BRD_ECHPCI) &&
2200 (ioaddr >= (brdp->ioaddr2 + brdp->iosize2))) {
2206 brdp->nrpanels = panelnr;
2207 brdp->nrbnks = banknr;
2208 if (brdp->brdtype == BRD_ECH)
2209 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
2211 brdp->state |= BRD_FOUND;
2212 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
2213 printk("STALLION: failed to register interrupt "
2214 "routine for %s irq=%d\n", name, brdp->irq);
2221 stl_cleanup_panels(brdp);
2222 if (brdp->iosize2 > 0)
2223 release_region(brdp->ioaddr2, brdp->iosize2);
2225 release_region(brdp->ioaddr1, brdp->iosize1);
2230 /*****************************************************************************/
2233 * Initialize and configure the specified board.
2234 * Scan through all the boards in the configuration and see what we
2235 * can find. Handle EIO and the ECH boards a little differently here
2236 * since the initial search and setup is very different.
2239 static int __devinit stl_brdinit(struct stlbrd *brdp)
2243 pr_debug("stl_brdinit(brdp=%p)\n", brdp);
2245 switch (brdp->brdtype) {
2248 retval = stl_initeio(brdp);
2256 retval = stl_initech(brdp);
2261 printk("STALLION: board=%d is unknown board type=%d\n",
2262 brdp->brdnr, brdp->brdtype);
2267 if ((brdp->state & BRD_FOUND) == 0) {
2268 printk("STALLION: %s board not found, board=%d io=%x irq=%d\n",
2269 stl_brdnames[brdp->brdtype], brdp->brdnr,
2270 brdp->ioaddr1, brdp->irq);
2274 for (i = 0; i < STL_MAXPANELS; i++)
2275 if (brdp->panels[i] != NULL)
2276 stl_initports(brdp, brdp->panels[i]);
2278 printk("STALLION: %s found, board=%d io=%x irq=%d "
2279 "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype],
2280 brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels,
2285 free_irq(brdp->irq, brdp);
2287 stl_cleanup_panels(brdp);
2289 release_region(brdp->ioaddr1, brdp->iosize1);
2290 if (brdp->iosize2 > 0)
2291 release_region(brdp->ioaddr2, brdp->iosize2);
2296 /*****************************************************************************/
2299 * Find the next available board number that is free.
2302 static int __devinit stl_getbrdnr(void)
2306 for (i = 0; i < STL_MAXBRDS; i++)
2307 if (stl_brds[i] == NULL) {
2308 if (i >= stl_nrbrds)
2316 /*****************************************************************************/
2318 * We have a Stallion board. Allocate a board structure and
2319 * initialize it. Read its IO and IRQ resources from PCI
2320 * configuration space.
2323 static int __devinit stl_pciprobe(struct pci_dev *pdev,
2324 const struct pci_device_id *ent)
2326 struct stlbrd *brdp;
2327 unsigned int i, brdtype = ent->driver_data;
2328 int brdnr, retval = -ENODEV;
2330 if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE)
2333 retval = pci_enable_device(pdev);
2336 brdp = stl_allocbrd();
2341 mutex_lock(&stl_brdslock);
2342 brdnr = stl_getbrdnr();
2344 dev_err(&pdev->dev, "too many boards found, "
2345 "maximum supported %d\n", STL_MAXBRDS);
2346 mutex_unlock(&stl_brdslock);
2350 brdp->brdnr = (unsigned int)brdnr;
2351 stl_brds[brdp->brdnr] = brdp;
2352 mutex_unlock(&stl_brdslock);
2354 brdp->brdtype = brdtype;
2355 brdp->state |= STL_PROBED;
2358 * We have all resources from the board, so let's setup the actual
2359 * board structure now.
2363 brdp->ioaddr2 = pci_resource_start(pdev, 0);
2364 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2367 brdp->ioaddr2 = pci_resource_start(pdev, 2);
2368 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2371 brdp->ioaddr1 = pci_resource_start(pdev, 2);
2372 brdp->ioaddr2 = pci_resource_start(pdev, 1);
2375 dev_err(&pdev->dev, "unknown PCI board type=%u\n", brdtype);
2379 brdp->irq = pdev->irq;
2380 retval = stl_brdinit(brdp);
2384 pci_set_drvdata(pdev, brdp);
2386 for (i = 0; i < brdp->nrports; i++)
2387 tty_register_device(stl_serial,
2388 brdp->brdnr * STL_MAXPORTS + i, &pdev->dev);
2392 stl_brds[brdp->brdnr] = NULL;
2399 static void __devexit stl_pciremove(struct pci_dev *pdev)
2401 struct stlbrd *brdp = pci_get_drvdata(pdev);
2404 free_irq(brdp->irq, brdp);
2406 stl_cleanup_panels(brdp);
2408 release_region(brdp->ioaddr1, brdp->iosize1);
2409 if (brdp->iosize2 > 0)
2410 release_region(brdp->ioaddr2, brdp->iosize2);
2412 for (i = 0; i < brdp->nrports; i++)
2413 tty_unregister_device(stl_serial,
2414 brdp->brdnr * STL_MAXPORTS + i);
2416 stl_brds[brdp->brdnr] = NULL;
2420 static struct pci_driver stl_pcidriver = {
2422 .id_table = stl_pcibrds,
2423 .probe = stl_pciprobe,
2424 .remove = __devexit_p(stl_pciremove)
2427 /*****************************************************************************/
2430 * Return the board stats structure to user app.
2433 static int stl_getbrdstats(combrd_t __user *bp)
2435 combrd_t stl_brdstats;
2436 struct stlbrd *brdp;
2437 struct stlpanel *panelp;
2440 if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t)))
2442 if (stl_brdstats.brd >= STL_MAXBRDS)
2444 brdp = stl_brds[stl_brdstats.brd];
2448 memset(&stl_brdstats, 0, sizeof(combrd_t));
2449 stl_brdstats.brd = brdp->brdnr;
2450 stl_brdstats.type = brdp->brdtype;
2451 stl_brdstats.hwid = brdp->hwid;
2452 stl_brdstats.state = brdp->state;
2453 stl_brdstats.ioaddr = brdp->ioaddr1;
2454 stl_brdstats.ioaddr2 = brdp->ioaddr2;
2455 stl_brdstats.irq = brdp->irq;
2456 stl_brdstats.nrpanels = brdp->nrpanels;
2457 stl_brdstats.nrports = brdp->nrports;
2458 for (i = 0; i < brdp->nrpanels; i++) {
2459 panelp = brdp->panels[i];
2460 stl_brdstats.panels[i].panel = i;
2461 stl_brdstats.panels[i].hwid = panelp->hwid;
2462 stl_brdstats.panels[i].nrports = panelp->nrports;
2465 return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0;
2468 /*****************************************************************************/
2471 * Resolve the referenced port number into a port struct pointer.
2474 static struct stlport *stl_getport(int brdnr, int panelnr, int portnr)
2476 struct stlbrd *brdp;
2477 struct stlpanel *panelp;
2479 if (brdnr < 0 || brdnr >= STL_MAXBRDS)
2481 brdp = stl_brds[brdnr];
2484 if (panelnr < 0 || (unsigned int)panelnr >= brdp->nrpanels)
2486 panelp = brdp->panels[panelnr];
2489 if (portnr < 0 || (unsigned int)portnr >= panelp->nrports)
2491 return panelp->ports[portnr];
2494 /*****************************************************************************/
2497 * Return the port stats structure to user app. A NULL port struct
2498 * pointer passed in means that we need to find out from the app
2499 * what port to get stats for (used through board control device).
2502 static int stl_getportstats(struct stlport *portp, comstats_t __user *cp)
2504 comstats_t stl_comstats;
2505 unsigned char *head, *tail;
2506 unsigned long flags;
2509 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2511 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2517 portp->stats.state = portp->istate;
2518 portp->stats.flags = portp->port.flags;
2519 portp->stats.hwid = portp->hwid;
2521 portp->stats.ttystate = 0;
2522 portp->stats.cflags = 0;
2523 portp->stats.iflags = 0;
2524 portp->stats.oflags = 0;
2525 portp->stats.lflags = 0;
2526 portp->stats.rxbuffered = 0;
2528 spin_lock_irqsave(&stallion_lock, flags);
2529 if (portp->port.tty != NULL)
2530 if (portp->port.tty->driver_data == portp) {
2531 portp->stats.ttystate = portp->port.tty->flags;
2532 /* No longer available as a statistic */
2533 portp->stats.rxbuffered = 1; /*portp->port.tty->flip.count; */
2534 if (portp->port.tty->termios != NULL) {
2535 portp->stats.cflags = portp->port.tty->termios->c_cflag;
2536 portp->stats.iflags = portp->port.tty->termios->c_iflag;
2537 portp->stats.oflags = portp->port.tty->termios->c_oflag;
2538 portp->stats.lflags = portp->port.tty->termios->c_lflag;
2541 spin_unlock_irqrestore(&stallion_lock, flags);
2543 head = portp->tx.head;
2544 tail = portp->tx.tail;
2545 portp->stats.txbuffered = (head >= tail) ? (head - tail) :
2546 (STL_TXBUFSIZE - (tail - head));
2548 portp->stats.signals = (unsigned long) stl_getsignals(portp);
2550 return copy_to_user(cp, &portp->stats,
2551 sizeof(comstats_t)) ? -EFAULT : 0;
2554 /*****************************************************************************/
2557 * Clear the port stats structure. We also return it zeroed out...
2560 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp)
2562 comstats_t stl_comstats;
2565 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2567 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2573 memset(&portp->stats, 0, sizeof(comstats_t));
2574 portp->stats.brd = portp->brdnr;
2575 portp->stats.panel = portp->panelnr;
2576 portp->stats.port = portp->portnr;
2577 return copy_to_user(cp, &portp->stats,
2578 sizeof(comstats_t)) ? -EFAULT : 0;
2581 /*****************************************************************************/
2584 * Return the entire driver ports structure to a user app.
2587 static int stl_getportstruct(struct stlport __user *arg)
2589 struct stlport stl_dummyport;
2590 struct stlport *portp;
2592 if (copy_from_user(&stl_dummyport, arg, sizeof(struct stlport)))
2594 portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr,
2595 stl_dummyport.portnr);
2598 return copy_to_user(arg, portp, sizeof(struct stlport)) ? -EFAULT : 0;
2601 /*****************************************************************************/
2604 * Return the entire driver board structure to a user app.
2607 static int stl_getbrdstruct(struct stlbrd __user *arg)
2609 struct stlbrd stl_dummybrd;
2610 struct stlbrd *brdp;
2612 if (copy_from_user(&stl_dummybrd, arg, sizeof(struct stlbrd)))
2614 if (stl_dummybrd.brdnr >= STL_MAXBRDS)
2616 brdp = stl_brds[stl_dummybrd.brdnr];
2619 return copy_to_user(arg, brdp, sizeof(struct stlbrd)) ? -EFAULT : 0;
2622 /*****************************************************************************/
2625 * The "staliomem" device is also required to do some special operations
2626 * on the board and/or ports. In this driver it is mostly used for stats
2630 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg)
2633 void __user *argp = (void __user *)arg;
2635 pr_debug("stl_memioctl(ip=%p,fp=%p,cmd=%x,arg=%lx)\n", ip, fp, cmd,arg);
2638 if (brdnr >= STL_MAXBRDS)
2643 case COM_GETPORTSTATS:
2644 rc = stl_getportstats(NULL, argp);
2646 case COM_CLRPORTSTATS:
2647 rc = stl_clrportstats(NULL, argp);
2649 case COM_GETBRDSTATS:
2650 rc = stl_getbrdstats(argp);
2653 rc = stl_getportstruct(argp);
2656 rc = stl_getbrdstruct(argp);
2666 static const struct tty_operations stl_ops = {
2670 .put_char = stl_putchar,
2671 .flush_chars = stl_flushchars,
2672 .write_room = stl_writeroom,
2673 .chars_in_buffer = stl_charsinbuffer,
2675 .set_termios = stl_settermios,
2676 .throttle = stl_throttle,
2677 .unthrottle = stl_unthrottle,
2680 .hangup = stl_hangup,
2681 .flush_buffer = stl_flushbuffer,
2682 .break_ctl = stl_breakctl,
2683 .wait_until_sent = stl_waituntilsent,
2684 .send_xchar = stl_sendxchar,
2685 .read_proc = stl_readproc,
2686 .tiocmget = stl_tiocmget,
2687 .tiocmset = stl_tiocmset,
2690 /*****************************************************************************/
2691 /* CD1400 HARDWARE FUNCTIONS */
2692 /*****************************************************************************/
2695 * These functions get/set/update the registers of the cd1400 UARTs.
2696 * Access to the cd1400 registers is via an address/data io port pair.
2697 * (Maybe should make this inline...)
2700 static int stl_cd1400getreg(struct stlport *portp, int regnr)
2702 outb((regnr + portp->uartaddr), portp->ioaddr);
2703 return inb(portp->ioaddr + EREG_DATA);
2706 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value)
2708 outb(regnr + portp->uartaddr, portp->ioaddr);
2709 outb(value, portp->ioaddr + EREG_DATA);
2712 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value)
2714 outb(regnr + portp->uartaddr, portp->ioaddr);
2715 if (inb(portp->ioaddr + EREG_DATA) != value) {
2716 outb(value, portp->ioaddr + EREG_DATA);
2722 /*****************************************************************************/
2725 * Inbitialize the UARTs in a panel. We don't care what sort of board
2726 * these ports are on - since the port io registers are almost
2727 * identical when dealing with ports.
2730 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
2734 int nrchips, uartaddr, ioaddr;
2735 unsigned long flags;
2737 pr_debug("stl_panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
2739 spin_lock_irqsave(&brd_lock, flags);
2740 BRDENABLE(panelp->brdnr, panelp->pagenr);
2743 * Check that each chip is present and started up OK.
2746 nrchips = panelp->nrports / CD1400_PORTS;
2747 for (i = 0; i < nrchips; i++) {
2748 if (brdp->brdtype == BRD_ECHPCI) {
2749 outb((panelp->pagenr + (i >> 1)), brdp->ioctrl);
2750 ioaddr = panelp->iobase;
2752 ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1));
2753 uartaddr = (i & 0x01) ? 0x080 : 0;
2754 outb((GFRCR + uartaddr), ioaddr);
2755 outb(0, (ioaddr + EREG_DATA));
2756 outb((CCR + uartaddr), ioaddr);
2757 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2758 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2759 outb((GFRCR + uartaddr), ioaddr);
2760 for (j = 0; j < CCR_MAXWAIT; j++)
2761 if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0)
2764 if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) {
2765 printk("STALLION: cd1400 not responding, "
2766 "brd=%d panel=%d chip=%d\n",
2767 panelp->brdnr, panelp->panelnr, i);
2770 chipmask |= (0x1 << i);
2771 outb((PPR + uartaddr), ioaddr);
2772 outb(PPR_SCALAR, (ioaddr + EREG_DATA));
2775 BRDDISABLE(panelp->brdnr);
2776 spin_unlock_irqrestore(&brd_lock, flags);
2780 /*****************************************************************************/
2783 * Initialize hardware specific port registers.
2786 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
2788 unsigned long flags;
2789 pr_debug("stl_cd1400portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
2792 if ((brdp == NULL) || (panelp == NULL) ||
2796 spin_lock_irqsave(&brd_lock, flags);
2797 portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) ||
2798 (portp->portnr < 8)) ? 0 : EREG_BANKSIZE);
2799 portp->uartaddr = (portp->portnr & 0x04) << 5;
2800 portp->pagenr = panelp->pagenr + (portp->portnr >> 3);
2802 BRDENABLE(portp->brdnr, portp->pagenr);
2803 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2804 stl_cd1400setreg(portp, LIVR, (portp->portnr << 3));
2805 portp->hwid = stl_cd1400getreg(portp, GFRCR);
2806 BRDDISABLE(portp->brdnr);
2807 spin_unlock_irqrestore(&brd_lock, flags);
2810 /*****************************************************************************/
2813 * Wait for the command register to be ready. We will poll this,
2814 * since it won't usually take too long to be ready.
2817 static void stl_cd1400ccrwait(struct stlport *portp)
2821 for (i = 0; i < CCR_MAXWAIT; i++)
2822 if (stl_cd1400getreg(portp, CCR) == 0)
2825 printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n",
2826 portp->portnr, portp->panelnr, portp->brdnr);
2829 /*****************************************************************************/
2832 * Set up the cd1400 registers for a port based on the termios port
2836 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp)
2838 struct stlbrd *brdp;
2839 unsigned long flags;
2840 unsigned int clkdiv, baudrate;
2841 unsigned char cor1, cor2, cor3;
2842 unsigned char cor4, cor5, ccr;
2843 unsigned char srer, sreron, sreroff;
2844 unsigned char mcor1, mcor2, rtpr;
2845 unsigned char clk, div;
2861 brdp = stl_brds[portp->brdnr];
2866 * Set up the RX char ignore mask with those RX error types we
2867 * can ignore. We can get the cd1400 to help us out a little here,
2868 * it will ignore parity errors and breaks for us.
2870 portp->rxignoremsk = 0;
2871 if (tiosp->c_iflag & IGNPAR) {
2872 portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN);
2873 cor1 |= COR1_PARIGNORE;
2875 if (tiosp->c_iflag & IGNBRK) {
2876 portp->rxignoremsk |= ST_BREAK;
2877 cor4 |= COR4_IGNBRK;
2880 portp->rxmarkmsk = ST_OVERRUN;
2881 if (tiosp->c_iflag & (INPCK | PARMRK))
2882 portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING);
2883 if (tiosp->c_iflag & BRKINT)
2884 portp->rxmarkmsk |= ST_BREAK;
2887 * Go through the char size, parity and stop bits and set all the
2888 * option register appropriately.
2890 switch (tiosp->c_cflag & CSIZE) {
2905 if (tiosp->c_cflag & CSTOPB)
2910 if (tiosp->c_cflag & PARENB) {
2911 if (tiosp->c_cflag & PARODD)
2912 cor1 |= (COR1_PARENB | COR1_PARODD);
2914 cor1 |= (COR1_PARENB | COR1_PAREVEN);
2916 cor1 |= COR1_PARNONE;
2920 * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing
2921 * space for hardware flow control and the like. This should be set to
2922 * VMIN. Also here we will set the RX data timeout to 10ms - this should
2923 * really be based on VTIME.
2925 cor3 |= FIFO_RXTHRESHOLD;
2929 * Calculate the baud rate timers. For now we will just assume that
2930 * the input and output baud are the same. Could have used a baud
2931 * table here, but this way we can generate virtually any baud rate
2934 baudrate = tiosp->c_cflag & CBAUD;
2935 if (baudrate & CBAUDEX) {
2936 baudrate &= ~CBAUDEX;
2937 if ((baudrate < 1) || (baudrate > 4))
2938 tiosp->c_cflag &= ~CBAUDEX;
2942 baudrate = stl_baudrates[baudrate];
2943 if ((tiosp->c_cflag & CBAUD) == B38400) {
2944 if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2946 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2948 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2950 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2952 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
2953 baudrate = (portp->baud_base / portp->custom_divisor);
2955 if (baudrate > STL_CD1400MAXBAUD)
2956 baudrate = STL_CD1400MAXBAUD;
2959 for (clk = 0; clk < CD1400_NUMCLKS; clk++) {
2960 clkdiv = (portp->clk / stl_cd1400clkdivs[clk]) / baudrate;
2964 div = (unsigned char) clkdiv;
2968 * Check what form of modem signaling is required and set it up.
2970 if ((tiosp->c_cflag & CLOCAL) == 0) {
2973 sreron |= SRER_MODEM;
2974 portp->port.flags |= ASYNC_CHECK_CD;
2976 portp->port.flags &= ~ASYNC_CHECK_CD;
2979 * Setup cd1400 enhanced modes if we can. In particular we want to
2980 * handle as much of the flow control as possible automatically. As
2981 * well as saving a few CPU cycles it will also greatly improve flow
2982 * control reliability.
2984 if (tiosp->c_iflag & IXON) {
2987 if (tiosp->c_iflag & IXANY)
2991 if (tiosp->c_cflag & CRTSCTS) {
2993 mcor1 |= FIFO_RTSTHRESHOLD;
2997 * All cd1400 register values calculated so go through and set
3001 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3002 portp->portnr, portp->panelnr, portp->brdnr);
3003 pr_debug(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n",
3004 cor1, cor2, cor3, cor4, cor5);
3005 pr_debug(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n",
3006 mcor1, mcor2, rtpr, sreron, sreroff);
3007 pr_debug(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div);
3008 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3009 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
3010 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
3012 spin_lock_irqsave(&brd_lock, flags);
3013 BRDENABLE(portp->brdnr, portp->pagenr);
3014 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3));
3015 srer = stl_cd1400getreg(portp, SRER);
3016 stl_cd1400setreg(portp, SRER, 0);
3017 if (stl_cd1400updatereg(portp, COR1, cor1))
3019 if (stl_cd1400updatereg(portp, COR2, cor2))
3021 if (stl_cd1400updatereg(portp, COR3, cor3))
3024 stl_cd1400ccrwait(portp);
3025 stl_cd1400setreg(portp, CCR, CCR_CORCHANGE);
3027 stl_cd1400setreg(portp, COR4, cor4);
3028 stl_cd1400setreg(portp, COR5, cor5);
3029 stl_cd1400setreg(portp, MCOR1, mcor1);
3030 stl_cd1400setreg(portp, MCOR2, mcor2);
3032 stl_cd1400setreg(portp, TCOR, clk);
3033 stl_cd1400setreg(portp, TBPR, div);
3034 stl_cd1400setreg(portp, RCOR, clk);
3035 stl_cd1400setreg(portp, RBPR, div);
3037 stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]);
3038 stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]);
3039 stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]);
3040 stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]);
3041 stl_cd1400setreg(portp, RTPR, rtpr);
3042 mcor1 = stl_cd1400getreg(portp, MSVR1);
3043 if (mcor1 & MSVR1_DCD)
3044 portp->sigs |= TIOCM_CD;
3046 portp->sigs &= ~TIOCM_CD;
3047 stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron));
3048 BRDDISABLE(portp->brdnr);
3049 spin_unlock_irqrestore(&brd_lock, flags);
3052 /*****************************************************************************/
3055 * Set the state of the DTR and RTS signals.
3058 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts)
3060 unsigned char msvr1, msvr2;
3061 unsigned long flags;
3063 pr_debug("stl_cd1400setsignals(portp=%p,dtr=%d,rts=%d)\n",
3073 spin_lock_irqsave(&brd_lock, flags);
3074 BRDENABLE(portp->brdnr, portp->pagenr);
3075 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3077 stl_cd1400setreg(portp, MSVR2, msvr2);
3079 stl_cd1400setreg(portp, MSVR1, msvr1);
3080 BRDDISABLE(portp->brdnr);
3081 spin_unlock_irqrestore(&brd_lock, flags);
3084 /*****************************************************************************/
3087 * Return the state of the signals.
3090 static int stl_cd1400getsignals(struct stlport *portp)
3092 unsigned char msvr1, msvr2;
3093 unsigned long flags;
3096 pr_debug("stl_cd1400getsignals(portp=%p)\n", portp);
3098 spin_lock_irqsave(&brd_lock, flags);
3099 BRDENABLE(portp->brdnr, portp->pagenr);
3100 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3101 msvr1 = stl_cd1400getreg(portp, MSVR1);
3102 msvr2 = stl_cd1400getreg(portp, MSVR2);
3103 BRDDISABLE(portp->brdnr);
3104 spin_unlock_irqrestore(&brd_lock, flags);
3107 sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0;
3108 sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0;
3109 sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0;
3110 sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0;
3112 sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0;
3113 sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0;
3120 /*****************************************************************************/
3123 * Enable/Disable the Transmitter and/or Receiver.
3126 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx)
3129 unsigned long flags;
3131 pr_debug("stl_cd1400enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3136 ccr |= CCR_TXDISABLE;
3138 ccr |= CCR_TXENABLE;
3140 ccr |= CCR_RXDISABLE;
3142 ccr |= CCR_RXENABLE;
3144 spin_lock_irqsave(&brd_lock, flags);
3145 BRDENABLE(portp->brdnr, portp->pagenr);
3146 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3147 stl_cd1400ccrwait(portp);
3148 stl_cd1400setreg(portp, CCR, ccr);
3149 stl_cd1400ccrwait(portp);
3150 BRDDISABLE(portp->brdnr);
3151 spin_unlock_irqrestore(&brd_lock, flags);
3154 /*****************************************************************************/
3157 * Start/stop the Transmitter and/or Receiver.
3160 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx)
3162 unsigned char sreron, sreroff;
3163 unsigned long flags;
3165 pr_debug("stl_cd1400startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3170 sreroff |= (SRER_TXDATA | SRER_TXEMPTY);
3172 sreron |= SRER_TXDATA;
3174 sreron |= SRER_TXEMPTY;
3176 sreroff |= SRER_RXDATA;
3178 sreron |= SRER_RXDATA;
3180 spin_lock_irqsave(&brd_lock, flags);
3181 BRDENABLE(portp->brdnr, portp->pagenr);
3182 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3183 stl_cd1400setreg(portp, SRER,
3184 ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron));
3185 BRDDISABLE(portp->brdnr);
3187 set_bit(ASYI_TXBUSY, &portp->istate);
3188 spin_unlock_irqrestore(&brd_lock, flags);
3191 /*****************************************************************************/
3194 * Disable all interrupts from this port.
3197 static void stl_cd1400disableintrs(struct stlport *portp)
3199 unsigned long flags;
3201 pr_debug("stl_cd1400disableintrs(portp=%p)\n", portp);
3203 spin_lock_irqsave(&brd_lock, flags);
3204 BRDENABLE(portp->brdnr, portp->pagenr);
3205 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3206 stl_cd1400setreg(portp, SRER, 0);
3207 BRDDISABLE(portp->brdnr);
3208 spin_unlock_irqrestore(&brd_lock, flags);
3211 /*****************************************************************************/
3213 static void stl_cd1400sendbreak(struct stlport *portp, int len)
3215 unsigned long flags;
3217 pr_debug("stl_cd1400sendbreak(portp=%p,len=%d)\n", portp, len);
3219 spin_lock_irqsave(&brd_lock, flags);
3220 BRDENABLE(portp->brdnr, portp->pagenr);
3221 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3222 stl_cd1400setreg(portp, SRER,
3223 ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) |
3225 BRDDISABLE(portp->brdnr);
3226 portp->brklen = len;
3228 portp->stats.txbreaks++;
3229 spin_unlock_irqrestore(&brd_lock, flags);
3232 /*****************************************************************************/
3235 * Take flow control actions...
3238 static void stl_cd1400flowctrl(struct stlport *portp, int state)
3240 struct tty_struct *tty;
3241 unsigned long flags;
3243 pr_debug("stl_cd1400flowctrl(portp=%p,state=%x)\n", portp, state);
3247 tty = portp->port.tty;
3251 spin_lock_irqsave(&brd_lock, flags);
3252 BRDENABLE(portp->brdnr, portp->pagenr);
3253 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3256 if (tty->termios->c_iflag & IXOFF) {
3257 stl_cd1400ccrwait(portp);
3258 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3259 portp->stats.rxxon++;
3260 stl_cd1400ccrwait(portp);
3263 * Question: should we return RTS to what it was before? It may
3264 * have been set by an ioctl... Suppose not, since if you have
3265 * hardware flow control set then it is pretty silly to go and
3266 * set the RTS line by hand.
3268 if (tty->termios->c_cflag & CRTSCTS) {
3269 stl_cd1400setreg(portp, MCOR1,
3270 (stl_cd1400getreg(portp, MCOR1) |
3271 FIFO_RTSTHRESHOLD));
3272 stl_cd1400setreg(portp, MSVR2, MSVR2_RTS);
3273 portp->stats.rxrtson++;
3276 if (tty->termios->c_iflag & IXOFF) {
3277 stl_cd1400ccrwait(portp);
3278 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3279 portp->stats.rxxoff++;
3280 stl_cd1400ccrwait(portp);
3282 if (tty->termios->c_cflag & CRTSCTS) {
3283 stl_cd1400setreg(portp, MCOR1,
3284 (stl_cd1400getreg(portp, MCOR1) & 0xf0));
3285 stl_cd1400setreg(portp, MSVR2, 0);
3286 portp->stats.rxrtsoff++;
3290 BRDDISABLE(portp->brdnr);
3291 spin_unlock_irqrestore(&brd_lock, flags);
3294 /*****************************************************************************/
3297 * Send a flow control character...
3300 static void stl_cd1400sendflow(struct stlport *portp, int state)
3302 struct tty_struct *tty;
3303 unsigned long flags;
3305 pr_debug("stl_cd1400sendflow(portp=%p,state=%x)\n", portp, state);
3309 tty = portp->port.tty;
3313 spin_lock_irqsave(&brd_lock, flags);
3314 BRDENABLE(portp->brdnr, portp->pagenr);
3315 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3317 stl_cd1400ccrwait(portp);
3318 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3319 portp->stats.rxxon++;
3320 stl_cd1400ccrwait(portp);
3322 stl_cd1400ccrwait(portp);
3323 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3324 portp->stats.rxxoff++;
3325 stl_cd1400ccrwait(portp);
3327 BRDDISABLE(portp->brdnr);
3328 spin_unlock_irqrestore(&brd_lock, flags);
3331 /*****************************************************************************/
3333 static void stl_cd1400flush(struct stlport *portp)
3335 unsigned long flags;
3337 pr_debug("stl_cd1400flush(portp=%p)\n", portp);
3342 spin_lock_irqsave(&brd_lock, flags);
3343 BRDENABLE(portp->brdnr, portp->pagenr);
3344 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3345 stl_cd1400ccrwait(portp);
3346 stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO);
3347 stl_cd1400ccrwait(portp);
3348 portp->tx.tail = portp->tx.head;
3349 BRDDISABLE(portp->brdnr);
3350 spin_unlock_irqrestore(&brd_lock, flags);
3353 /*****************************************************************************/
3356 * Return the current state of data flow on this port. This is only
3357 * really interresting when determining if data has fully completed
3358 * transmission or not... This is easy for the cd1400, it accurately
3359 * maintains the busy port flag.
3362 static int stl_cd1400datastate(struct stlport *portp)
3364 pr_debug("stl_cd1400datastate(portp=%p)\n", portp);
3369 return test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0;
3372 /*****************************************************************************/
3375 * Interrupt service routine for cd1400 EasyIO boards.
3378 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase)
3380 unsigned char svrtype;
3382 pr_debug("stl_cd1400eiointr(panelp=%p,iobase=%x)\n", panelp, iobase);
3384 spin_lock(&brd_lock);
3386 svrtype = inb(iobase + EREG_DATA);
3387 if (panelp->nrports > 4) {
3388 outb((SVRR + 0x80), iobase);
3389 svrtype |= inb(iobase + EREG_DATA);
3392 if (svrtype & SVRR_RX)
3393 stl_cd1400rxisr(panelp, iobase);
3394 else if (svrtype & SVRR_TX)
3395 stl_cd1400txisr(panelp, iobase);
3396 else if (svrtype & SVRR_MDM)
3397 stl_cd1400mdmisr(panelp, iobase);
3399 spin_unlock(&brd_lock);
3402 /*****************************************************************************/
3405 * Interrupt service routine for cd1400 panels.
3408 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase)
3410 unsigned char svrtype;
3412 pr_debug("stl_cd1400echintr(panelp=%p,iobase=%x)\n", panelp, iobase);
3415 svrtype = inb(iobase + EREG_DATA);
3416 outb((SVRR + 0x80), iobase);
3417 svrtype |= inb(iobase + EREG_DATA);
3418 if (svrtype & SVRR_RX)
3419 stl_cd1400rxisr(panelp, iobase);
3420 else if (svrtype & SVRR_TX)
3421 stl_cd1400txisr(panelp, iobase);
3422 else if (svrtype & SVRR_MDM)
3423 stl_cd1400mdmisr(panelp, iobase);
3427 /*****************************************************************************/
3430 * Unfortunately we need to handle breaks in the TX data stream, since
3431 * this is the only way to generate them on the cd1400.
3434 static int stl_cd1400breakisr(struct stlport *portp, int ioaddr)
3436 if (portp->brklen == 1) {
3437 outb((COR2 + portp->uartaddr), ioaddr);
3438 outb((inb(ioaddr + EREG_DATA) | COR2_ETC),
3439 (ioaddr + EREG_DATA));
3440 outb((TDR + portp->uartaddr), ioaddr);
3441 outb(ETC_CMD, (ioaddr + EREG_DATA));
3442 outb(ETC_STARTBREAK, (ioaddr + EREG_DATA));
3443 outb((SRER + portp->uartaddr), ioaddr);
3444 outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)),
3445 (ioaddr + EREG_DATA));
3447 } else if (portp->brklen > 1) {
3448 outb((TDR + portp->uartaddr), ioaddr);
3449 outb(ETC_CMD, (ioaddr + EREG_DATA));
3450 outb(ETC_STOPBREAK, (ioaddr + EREG_DATA));
3454 outb((COR2 + portp->uartaddr), ioaddr);
3455 outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC),
3456 (ioaddr + EREG_DATA));
3462 /*****************************************************************************/
3465 * Transmit interrupt handler. This has gotta be fast! Handling TX
3466 * chars is pretty simple, stuff as many as possible from the TX buffer
3467 * into the cd1400 FIFO. Must also handle TX breaks here, since they
3468 * are embedded as commands in the data stream. Oh no, had to use a goto!
3469 * This could be optimized more, will do when I get time...
3470 * In practice it is possible that interrupts are enabled but that the
3471 * port has been hung up. Need to handle not having any TX buffer here,
3472 * this is done by using the side effect that head and tail will also
3473 * be NULL if the buffer has been freed.
3476 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr)
3478 struct stlport *portp;
3481 unsigned char ioack, srer;
3483 pr_debug("stl_cd1400txisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3485 ioack = inb(ioaddr + EREG_TXACK);
3486 if (((ioack & panelp->ackmask) != 0) ||
3487 ((ioack & ACK_TYPMASK) != ACK_TYPTX)) {
3488 printk("STALLION: bad TX interrupt ack value=%x\n", ioack);
3491 portp = panelp->ports[(ioack >> 3)];
3494 * Unfortunately we need to handle breaks in the data stream, since
3495 * this is the only way to generate them on the cd1400. Do it now if
3496 * a break is to be sent.
3498 if (portp->brklen != 0)
3499 if (stl_cd1400breakisr(portp, ioaddr))
3502 head = portp->tx.head;
3503 tail = portp->tx.tail;
3504 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
3505 if ((len == 0) || ((len < STL_TXBUFLOW) &&
3506 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
3507 set_bit(ASYI_TXLOW, &portp->istate);
3508 if (portp->port.tty)
3509 tty_wakeup(portp->port.tty);
3513 outb((SRER + portp->uartaddr), ioaddr);
3514 srer = inb(ioaddr + EREG_DATA);
3515 if (srer & SRER_TXDATA) {
3516 srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY;
3518 srer &= ~(SRER_TXDATA | SRER_TXEMPTY);
3519 clear_bit(ASYI_TXBUSY, &portp->istate);
3521 outb(srer, (ioaddr + EREG_DATA));
3523 len = min(len, CD1400_TXFIFOSIZE);
3524 portp->stats.txtotal += len;
3525 stlen = min_t(unsigned int, len,
3526 (portp->tx.buf + STL_TXBUFSIZE) - tail);
3527 outb((TDR + portp->uartaddr), ioaddr);
3528 outsb((ioaddr + EREG_DATA), tail, stlen);
3531 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
3532 tail = portp->tx.buf;
3534 outsb((ioaddr + EREG_DATA), tail, len);
3537 portp->tx.tail = tail;
3541 outb((EOSRR + portp->uartaddr), ioaddr);
3542 outb(0, (ioaddr + EREG_DATA));
3545 /*****************************************************************************/
3548 * Receive character interrupt handler. Determine if we have good chars
3549 * or bad chars and then process appropriately. Good chars are easy
3550 * just shove the lot into the RX buffer and set all status byte to 0.
3551 * If a bad RX char then process as required. This routine needs to be
3552 * fast! In practice it is possible that we get an interrupt on a port
3553 * that is closed. This can happen on hangups - since they completely
3554 * shutdown a port not in user context. Need to handle this case.
3557 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr)
3559 struct stlport *portp;
3560 struct tty_struct *tty;
3561 unsigned int ioack, len, buflen;
3562 unsigned char status;
3565 pr_debug("stl_cd1400rxisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3567 ioack = inb(ioaddr + EREG_RXACK);
3568 if ((ioack & panelp->ackmask) != 0) {
3569 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3572 portp = panelp->ports[(ioack >> 3)];
3573 tty = portp->port.tty;
3575 if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) {
3576 outb((RDCR + portp->uartaddr), ioaddr);
3577 len = inb(ioaddr + EREG_DATA);
3578 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
3579 len = min_t(unsigned int, len, sizeof(stl_unwanted));
3580 outb((RDSR + portp->uartaddr), ioaddr);
3581 insb((ioaddr + EREG_DATA), &stl_unwanted[0], len);
3582 portp->stats.rxlost += len;
3583 portp->stats.rxtotal += len;
3585 len = min(len, buflen);
3588 outb((RDSR + portp->uartaddr), ioaddr);
3589 tty_prepare_flip_string(tty, &ptr, len);
3590 insb((ioaddr + EREG_DATA), ptr, len);
3591 tty_schedule_flip(tty);
3592 portp->stats.rxtotal += len;
3595 } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) {
3596 outb((RDSR + portp->uartaddr), ioaddr);
3597 status = inb(ioaddr + EREG_DATA);
3598 ch = inb(ioaddr + EREG_DATA);
3599 if (status & ST_PARITY)
3600 portp->stats.rxparity++;
3601 if (status & ST_FRAMING)
3602 portp->stats.rxframing++;
3603 if (status & ST_OVERRUN)
3604 portp->stats.rxoverrun++;
3605 if (status & ST_BREAK)
3606 portp->stats.rxbreaks++;
3607 if (status & ST_SCHARMASK) {
3608 if ((status & ST_SCHARMASK) == ST_SCHAR1)
3609 portp->stats.txxon++;
3610 if ((status & ST_SCHARMASK) == ST_SCHAR2)
3611 portp->stats.txxoff++;
3614 if (tty != NULL && (portp->rxignoremsk & status) == 0) {
3615 if (portp->rxmarkmsk & status) {
3616 if (status & ST_BREAK) {
3618 if (portp->port.flags & ASYNC_SAK) {
3620 BRDENABLE(portp->brdnr, portp->pagenr);
3622 } else if (status & ST_PARITY)
3623 status = TTY_PARITY;
3624 else if (status & ST_FRAMING)
3626 else if(status & ST_OVERRUN)
3627 status = TTY_OVERRUN;
3632 tty_insert_flip_char(tty, ch, status);
3633 tty_schedule_flip(tty);
3636 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3641 outb((EOSRR + portp->uartaddr), ioaddr);
3642 outb(0, (ioaddr + EREG_DATA));
3645 /*****************************************************************************/
3648 * Modem interrupt handler. The is called when the modem signal line
3649 * (DCD) has changed state. Leave most of the work to the off-level
3650 * processing routine.
3653 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr)
3655 struct stlport *portp;
3659 pr_debug("stl_cd1400mdmisr(panelp=%p)\n", panelp);
3661 ioack = inb(ioaddr + EREG_MDACK);
3662 if (((ioack & panelp->ackmask) != 0) ||
3663 ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) {
3664 printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack);
3667 portp = panelp->ports[(ioack >> 3)];
3669 outb((MISR + portp->uartaddr), ioaddr);
3670 misr = inb(ioaddr + EREG_DATA);
3671 if (misr & MISR_DCD) {
3672 stl_cd_change(portp);
3673 portp->stats.modem++;
3676 outb((EOSRR + portp->uartaddr), ioaddr);
3677 outb(0, (ioaddr + EREG_DATA));
3680 /*****************************************************************************/
3681 /* SC26198 HARDWARE FUNCTIONS */
3682 /*****************************************************************************/
3685 * These functions get/set/update the registers of the sc26198 UARTs.
3686 * Access to the sc26198 registers is via an address/data io port pair.
3687 * (Maybe should make this inline...)
3690 static int stl_sc26198getreg(struct stlport *portp, int regnr)
3692 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3693 return inb(portp->ioaddr + XP_DATA);
3696 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value)
3698 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3699 outb(value, (portp->ioaddr + XP_DATA));
3702 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value)
3704 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3705 if (inb(portp->ioaddr + XP_DATA) != value) {
3706 outb(value, (portp->ioaddr + XP_DATA));
3712 /*****************************************************************************/
3715 * Functions to get and set the sc26198 global registers.
3718 static int stl_sc26198getglobreg(struct stlport *portp, int regnr)
3720 outb(regnr, (portp->ioaddr + XP_ADDR));
3721 return inb(portp->ioaddr + XP_DATA);
3725 static void stl_sc26198setglobreg(struct stlport *portp, int regnr, int value)
3727 outb(regnr, (portp->ioaddr + XP_ADDR));
3728 outb(value, (portp->ioaddr + XP_DATA));
3732 /*****************************************************************************/
3735 * Inbitialize the UARTs in a panel. We don't care what sort of board
3736 * these ports are on - since the port io registers are almost
3737 * identical when dealing with ports.
3740 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
3743 int nrchips, ioaddr;
3745 pr_debug("stl_sc26198panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
3747 BRDENABLE(panelp->brdnr, panelp->pagenr);
3750 * Check that each chip is present and started up OK.
3753 nrchips = (panelp->nrports + 4) / SC26198_PORTS;
3754 if (brdp->brdtype == BRD_ECHPCI)
3755 outb(panelp->pagenr, brdp->ioctrl);
3757 for (i = 0; i < nrchips; i++) {
3758 ioaddr = panelp->iobase + (i * 4);
3759 outb(SCCR, (ioaddr + XP_ADDR));
3760 outb(CR_RESETALL, (ioaddr + XP_DATA));
3761 outb(TSTR, (ioaddr + XP_ADDR));
3762 if (inb(ioaddr + XP_DATA) != 0) {
3763 printk("STALLION: sc26198 not responding, "
3764 "brd=%d panel=%d chip=%d\n",
3765 panelp->brdnr, panelp->panelnr, i);
3768 chipmask |= (0x1 << i);
3769 outb(GCCR, (ioaddr + XP_ADDR));
3770 outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA));
3771 outb(WDTRCR, (ioaddr + XP_ADDR));
3772 outb(0xff, (ioaddr + XP_DATA));
3775 BRDDISABLE(panelp->brdnr);
3779 /*****************************************************************************/
3782 * Initialize hardware specific port registers.
3785 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
3787 pr_debug("stl_sc26198portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
3790 if ((brdp == NULL) || (panelp == NULL) ||
3794 portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4);
3795 portp->uartaddr = (portp->portnr & 0x07) << 4;
3796 portp->pagenr = panelp->pagenr;
3799 BRDENABLE(portp->brdnr, portp->pagenr);
3800 stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS);
3801 BRDDISABLE(portp->brdnr);
3804 /*****************************************************************************/
3807 * Set up the sc26198 registers for a port based on the termios port
3811 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp)
3813 struct stlbrd *brdp;
3814 unsigned long flags;
3815 unsigned int baudrate;
3816 unsigned char mr0, mr1, mr2, clk;
3817 unsigned char imron, imroff, iopr, ipr;
3827 brdp = stl_brds[portp->brdnr];
3832 * Set up the RX char ignore mask with those RX error types we
3835 portp->rxignoremsk = 0;
3836 if (tiosp->c_iflag & IGNPAR)
3837 portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING |
3839 if (tiosp->c_iflag & IGNBRK)
3840 portp->rxignoremsk |= SR_RXBREAK;
3842 portp->rxmarkmsk = SR_RXOVERRUN;
3843 if (tiosp->c_iflag & (INPCK | PARMRK))
3844 portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING);
3845 if (tiosp->c_iflag & BRKINT)
3846 portp->rxmarkmsk |= SR_RXBREAK;
3849 * Go through the char size, parity and stop bits and set all the
3850 * option register appropriately.
3852 switch (tiosp->c_cflag & CSIZE) {
3867 if (tiosp->c_cflag & CSTOPB)
3872 if (tiosp->c_cflag & PARENB) {
3873 if (tiosp->c_cflag & PARODD)
3874 mr1 |= (MR1_PARENB | MR1_PARODD);
3876 mr1 |= (MR1_PARENB | MR1_PAREVEN);
3880 mr1 |= MR1_ERRBLOCK;
3883 * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing
3884 * space for hardware flow control and the like. This should be set to
3887 mr2 |= MR2_RXFIFOHALF;
3890 * Calculate the baud rate timers. For now we will just assume that
3891 * the input and output baud are the same. The sc26198 has a fixed
3892 * baud rate table, so only discrete baud rates possible.
3894 baudrate = tiosp->c_cflag & CBAUD;
3895 if (baudrate & CBAUDEX) {
3896 baudrate &= ~CBAUDEX;
3897 if ((baudrate < 1) || (baudrate > 4))
3898 tiosp->c_cflag &= ~CBAUDEX;
3902 baudrate = stl_baudrates[baudrate];
3903 if ((tiosp->c_cflag & CBAUD) == B38400) {
3904 if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3906 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3908 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3910 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3912 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
3913 baudrate = (portp->baud_base / portp->custom_divisor);
3915 if (baudrate > STL_SC26198MAXBAUD)
3916 baudrate = STL_SC26198MAXBAUD;
3919 for (clk = 0; clk < SC26198_NRBAUDS; clk++)
3920 if (baudrate <= sc26198_baudtable[clk])
3924 * Check what form of modem signaling is required and set it up.
3926 if (tiosp->c_cflag & CLOCAL) {
3927 portp->port.flags &= ~ASYNC_CHECK_CD;
3929 iopr |= IOPR_DCDCOS;
3931 portp->port.flags |= ASYNC_CHECK_CD;
3935 * Setup sc26198 enhanced modes if we can. In particular we want to
3936 * handle as much of the flow control as possible automatically. As
3937 * well as saving a few CPU cycles it will also greatly improve flow
3938 * control reliability.
3940 if (tiosp->c_iflag & IXON) {
3941 mr0 |= MR0_SWFTX | MR0_SWFT;
3942 imron |= IR_XONXOFF;
3944 imroff |= IR_XONXOFF;
3946 if (tiosp->c_iflag & IXOFF)
3949 if (tiosp->c_cflag & CRTSCTS) {
3955 * All sc26198 register values calculated so go through and set
3959 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3960 portp->portnr, portp->panelnr, portp->brdnr);
3961 pr_debug(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk);
3962 pr_debug(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff);
3963 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3964 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
3965 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
3967 spin_lock_irqsave(&brd_lock, flags);
3968 BRDENABLE(portp->brdnr, portp->pagenr);
3969 stl_sc26198setreg(portp, IMR, 0);
3970 stl_sc26198updatereg(portp, MR0, mr0);
3971 stl_sc26198updatereg(portp, MR1, mr1);
3972 stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK);
3973 stl_sc26198updatereg(portp, MR2, mr2);
3974 stl_sc26198updatereg(portp, IOPIOR,
3975 ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr));
3978 stl_sc26198setreg(portp, TXCSR, clk);
3979 stl_sc26198setreg(portp, RXCSR, clk);
3982 stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]);
3983 stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]);
3985 ipr = stl_sc26198getreg(portp, IPR);
3987 portp->sigs &= ~TIOCM_CD;
3989 portp->sigs |= TIOCM_CD;
3991 portp->imr = (portp->imr & ~imroff) | imron;
3992 stl_sc26198setreg(portp, IMR, portp->imr);
3993 BRDDISABLE(portp->brdnr);
3994 spin_unlock_irqrestore(&brd_lock, flags);
3997 /*****************************************************************************/
4000 * Set the state of the DTR and RTS signals.
4003 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts)
4005 unsigned char iopioron, iopioroff;
4006 unsigned long flags;
4008 pr_debug("stl_sc26198setsignals(portp=%p,dtr=%d,rts=%d)\n", portp,
4014 iopioroff |= IPR_DTR;
4016 iopioron |= IPR_DTR;
4018 iopioroff |= IPR_RTS;
4020 iopioron |= IPR_RTS;
4022 spin_lock_irqsave(&brd_lock, flags);
4023 BRDENABLE(portp->brdnr, portp->pagenr);
4024 stl_sc26198setreg(portp, IOPIOR,
4025 ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron));
4026 BRDDISABLE(portp->brdnr);
4027 spin_unlock_irqrestore(&brd_lock, flags);
4030 /*****************************************************************************/
4033 * Return the state of the signals.
4036 static int stl_sc26198getsignals(struct stlport *portp)
4039 unsigned long flags;
4042 pr_debug("stl_sc26198getsignals(portp=%p)\n", portp);
4044 spin_lock_irqsave(&brd_lock, flags);
4045 BRDENABLE(portp->brdnr, portp->pagenr);
4046 ipr = stl_sc26198getreg(portp, IPR);
4047 BRDDISABLE(portp->brdnr);
4048 spin_unlock_irqrestore(&brd_lock, flags);
4051 sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD;
4052 sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS;
4053 sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR;
4054 sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS;
4059 /*****************************************************************************/
4062 * Enable/Disable the Transmitter and/or Receiver.
4065 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx)
4068 unsigned long flags;
4070 pr_debug("stl_sc26198enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx,tx);
4072 ccr = portp->crenable;
4074 ccr &= ~CR_TXENABLE;
4078 ccr &= ~CR_RXENABLE;
4082 spin_lock_irqsave(&brd_lock, flags);
4083 BRDENABLE(portp->brdnr, portp->pagenr);
4084 stl_sc26198setreg(portp, SCCR, ccr);
4085 BRDDISABLE(portp->brdnr);
4086 portp->crenable = ccr;
4087 spin_unlock_irqrestore(&brd_lock, flags);
4090 /*****************************************************************************/
4093 * Start/stop the Transmitter and/or Receiver.
4096 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx)
4099 unsigned long flags;
4101 pr_debug("stl_sc26198startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
4109 imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG);
4111 imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG;
4113 spin_lock_irqsave(&brd_lock, flags);
4114 BRDENABLE(portp->brdnr, portp->pagenr);
4115 stl_sc26198setreg(portp, IMR, imr);
4116 BRDDISABLE(portp->brdnr);
4119 set_bit(ASYI_TXBUSY, &portp->istate);
4120 spin_unlock_irqrestore(&brd_lock, flags);
4123 /*****************************************************************************/
4126 * Disable all interrupts from this port.
4129 static void stl_sc26198disableintrs(struct stlport *portp)
4131 unsigned long flags;
4133 pr_debug("stl_sc26198disableintrs(portp=%p)\n", portp);
4135 spin_lock_irqsave(&brd_lock, flags);
4136 BRDENABLE(portp->brdnr, portp->pagenr);
4138 stl_sc26198setreg(portp, IMR, 0);
4139 BRDDISABLE(portp->brdnr);
4140 spin_unlock_irqrestore(&brd_lock, flags);
4143 /*****************************************************************************/
4145 static void stl_sc26198sendbreak(struct stlport *portp, int len)
4147 unsigned long flags;
4149 pr_debug("stl_sc26198sendbreak(portp=%p,len=%d)\n", portp, len);
4151 spin_lock_irqsave(&brd_lock, flags);
4152 BRDENABLE(portp->brdnr, portp->pagenr);
4154 stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK);
4155 portp->stats.txbreaks++;
4157 stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK);
4159 BRDDISABLE(portp->brdnr);
4160 spin_unlock_irqrestore(&brd_lock, flags);
4163 /*****************************************************************************/
4166 * Take flow control actions...
4169 static void stl_sc26198flowctrl(struct stlport *portp, int state)
4171 struct tty_struct *tty;
4172 unsigned long flags;
4175 pr_debug("stl_sc26198flowctrl(portp=%p,state=%x)\n", portp, state);
4179 tty = portp->port.tty;
4183 spin_lock_irqsave(&brd_lock, flags);
4184 BRDENABLE(portp->brdnr, portp->pagenr);
4187 if (tty->termios->c_iflag & IXOFF) {
4188 mr0 = stl_sc26198getreg(portp, MR0);
4189 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4190 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4192 portp->stats.rxxon++;
4193 stl_sc26198wait(portp);
4194 stl_sc26198setreg(portp, MR0, mr0);
4197 * Question: should we return RTS to what it was before? It may
4198 * have been set by an ioctl... Suppose not, since if you have
4199 * hardware flow control set then it is pretty silly to go and
4200 * set the RTS line by hand.
4202 if (tty->termios->c_cflag & CRTSCTS) {
4203 stl_sc26198setreg(portp, MR1,
4204 (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS));
4205 stl_sc26198setreg(portp, IOPIOR,
4206 (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS));
4207 portp->stats.rxrtson++;
4210 if (tty->termios->c_iflag & IXOFF) {
4211 mr0 = stl_sc26198getreg(portp, MR0);
4212 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4213 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4215 portp->stats.rxxoff++;
4216 stl_sc26198wait(portp);
4217 stl_sc26198setreg(portp, MR0, mr0);
4219 if (tty->termios->c_cflag & CRTSCTS) {
4220 stl_sc26198setreg(portp, MR1,
4221 (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS));
4222 stl_sc26198setreg(portp, IOPIOR,
4223 (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS));
4224 portp->stats.rxrtsoff++;
4228 BRDDISABLE(portp->brdnr);
4229 spin_unlock_irqrestore(&brd_lock, flags);
4232 /*****************************************************************************/
4235 * Send a flow control character.
4238 static void stl_sc26198sendflow(struct stlport *portp, int state)
4240 struct tty_struct *tty;
4241 unsigned long flags;
4244 pr_debug("stl_sc26198sendflow(portp=%p,state=%x)\n", portp, state);
4248 tty = portp->port.tty;
4252 spin_lock_irqsave(&brd_lock, flags);
4253 BRDENABLE(portp->brdnr, portp->pagenr);
4255 mr0 = stl_sc26198getreg(portp, MR0);
4256 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4257 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4259 portp->stats.rxxon++;
4260 stl_sc26198wait(portp);
4261 stl_sc26198setreg(portp, MR0, mr0);
4263 mr0 = stl_sc26198getreg(portp, MR0);
4264 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4265 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4267 portp->stats.rxxoff++;
4268 stl_sc26198wait(portp);
4269 stl_sc26198setreg(portp, MR0, mr0);
4271 BRDDISABLE(portp->brdnr);
4272 spin_unlock_irqrestore(&brd_lock, flags);
4275 /*****************************************************************************/
4277 static void stl_sc26198flush(struct stlport *portp)
4279 unsigned long flags;
4281 pr_debug("stl_sc26198flush(portp=%p)\n", portp);
4286 spin_lock_irqsave(&brd_lock, flags);
4287 BRDENABLE(portp->brdnr, portp->pagenr);
4288 stl_sc26198setreg(portp, SCCR, CR_TXRESET);
4289 stl_sc26198setreg(portp, SCCR, portp->crenable);
4290 BRDDISABLE(portp->brdnr);
4291 portp->tx.tail = portp->tx.head;
4292 spin_unlock_irqrestore(&brd_lock, flags);
4295 /*****************************************************************************/
4298 * Return the current state of data flow on this port. This is only
4299 * really interresting when determining if data has fully completed
4300 * transmission or not... The sc26198 interrupt scheme cannot
4301 * determine when all data has actually drained, so we need to
4302 * check the port statusy register to be sure.
4305 static int stl_sc26198datastate(struct stlport *portp)
4307 unsigned long flags;
4310 pr_debug("stl_sc26198datastate(portp=%p)\n", portp);
4314 if (test_bit(ASYI_TXBUSY, &portp->istate))
4317 spin_lock_irqsave(&brd_lock, flags);
4318 BRDENABLE(portp->brdnr, portp->pagenr);
4319 sr = stl_sc26198getreg(portp, SR);
4320 BRDDISABLE(portp->brdnr);
4321 spin_unlock_irqrestore(&brd_lock, flags);
4323 return (sr & SR_TXEMPTY) ? 0 : 1;
4326 /*****************************************************************************/
4329 * Delay for a small amount of time, to give the sc26198 a chance
4330 * to process a command...
4333 static void stl_sc26198wait(struct stlport *portp)
4337 pr_debug("stl_sc26198wait(portp=%p)\n", portp);
4342 for (i = 0; i < 20; i++)
4343 stl_sc26198getglobreg(portp, TSTR);
4346 /*****************************************************************************/
4349 * If we are TX flow controlled and in IXANY mode then we may
4350 * need to unflow control here. We gotta do this because of the
4351 * automatic flow control modes of the sc26198.
4354 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty)
4358 mr0 = stl_sc26198getreg(portp, MR0);
4359 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4360 stl_sc26198setreg(portp, SCCR, CR_HOSTXON);
4361 stl_sc26198wait(portp);
4362 stl_sc26198setreg(portp, MR0, mr0);
4363 clear_bit(ASYI_TXFLOWED, &portp->istate);
4366 /*****************************************************************************/
4369 * Interrupt service routine for sc26198 panels.
4372 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase)
4374 struct stlport *portp;
4377 spin_lock(&brd_lock);
4380 * Work around bug in sc26198 chip... Cannot have A6 address
4381 * line of UART high, else iack will be returned as 0.
4383 outb(0, (iobase + 1));
4385 iack = inb(iobase + XP_IACK);
4386 portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)];
4388 if (iack & IVR_RXDATA)
4389 stl_sc26198rxisr(portp, iack);
4390 else if (iack & IVR_TXDATA)
4391 stl_sc26198txisr(portp);
4393 stl_sc26198otherisr(portp, iack);
4395 spin_unlock(&brd_lock);
4398 /*****************************************************************************/
4401 * Transmit interrupt handler. This has gotta be fast! Handling TX
4402 * chars is pretty simple, stuff as many as possible from the TX buffer
4403 * into the sc26198 FIFO.
4404 * In practice it is possible that interrupts are enabled but that the
4405 * port has been hung up. Need to handle not having any TX buffer here,
4406 * this is done by using the side effect that head and tail will also
4407 * be NULL if the buffer has been freed.
4410 static void stl_sc26198txisr(struct stlport *portp)
4412 unsigned int ioaddr;
4417 pr_debug("stl_sc26198txisr(portp=%p)\n", portp);
4419 ioaddr = portp->ioaddr;
4420 head = portp->tx.head;
4421 tail = portp->tx.tail;
4422 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
4423 if ((len == 0) || ((len < STL_TXBUFLOW) &&
4424 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
4425 set_bit(ASYI_TXLOW, &portp->istate);
4426 if (portp->port.tty)
4427 tty_wakeup(portp->port.tty);
4431 outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR));
4432 mr0 = inb(ioaddr + XP_DATA);
4433 if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) {
4434 portp->imr &= ~IR_TXRDY;
4435 outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR));
4436 outb(portp->imr, (ioaddr + XP_DATA));
4437 clear_bit(ASYI_TXBUSY, &portp->istate);
4439 mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY);
4440 outb(mr0, (ioaddr + XP_DATA));
4443 len = min(len, SC26198_TXFIFOSIZE);
4444 portp->stats.txtotal += len;
4445 stlen = min_t(unsigned int, len,
4446 (portp->tx.buf + STL_TXBUFSIZE) - tail);
4447 outb(GTXFIFO, (ioaddr + XP_ADDR));
4448 outsb((ioaddr + XP_DATA), tail, stlen);
4451 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
4452 tail = portp->tx.buf;
4454 outsb((ioaddr + XP_DATA), tail, len);
4457 portp->tx.tail = tail;
4461 /*****************************************************************************/
4464 * Receive character interrupt handler. Determine if we have good chars
4465 * or bad chars and then process appropriately. Good chars are easy
4466 * just shove the lot into the RX buffer and set all status byte to 0.
4467 * If a bad RX char then process as required. This routine needs to be
4468 * fast! In practice it is possible that we get an interrupt on a port
4469 * that is closed. This can happen on hangups - since they completely
4470 * shutdown a port not in user context. Need to handle this case.
4473 static void stl_sc26198rxisr(struct stlport *portp, unsigned int iack)
4475 struct tty_struct *tty;
4476 unsigned int len, buflen, ioaddr;
4478 pr_debug("stl_sc26198rxisr(portp=%p,iack=%x)\n", portp, iack);
4480 tty = portp->port.tty;
4481 ioaddr = portp->ioaddr;
4482 outb(GIBCR, (ioaddr + XP_ADDR));
4483 len = inb(ioaddr + XP_DATA) + 1;
4485 if ((iack & IVR_TYPEMASK) == IVR_RXDATA) {
4486 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
4487 len = min_t(unsigned int, len, sizeof(stl_unwanted));
4488 outb(GRXFIFO, (ioaddr + XP_ADDR));
4489 insb((ioaddr + XP_DATA), &stl_unwanted[0], len);
4490 portp->stats.rxlost += len;
4491 portp->stats.rxtotal += len;
4493 len = min(len, buflen);
4496 outb(GRXFIFO, (ioaddr + XP_ADDR));
4497 tty_prepare_flip_string(tty, &ptr, len);
4498 insb((ioaddr + XP_DATA), ptr, len);
4499 tty_schedule_flip(tty);
4500 portp->stats.rxtotal += len;
4504 stl_sc26198rxbadchars(portp);
4508 * If we are TX flow controlled and in IXANY mode then we may need
4509 * to unflow control here. We gotta do this because of the automatic
4510 * flow control modes of the sc26198.
4512 if (test_bit(ASYI_TXFLOWED, &portp->istate)) {
4513 if ((tty != NULL) &&
4514 (tty->termios != NULL) &&
4515 (tty->termios->c_iflag & IXANY)) {
4516 stl_sc26198txunflow(portp, tty);
4521 /*****************************************************************************/
4524 * Process an RX bad character.
4527 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch)
4529 struct tty_struct *tty;
4530 unsigned int ioaddr;
4532 tty = portp->port.tty;
4533 ioaddr = portp->ioaddr;
4535 if (status & SR_RXPARITY)
4536 portp->stats.rxparity++;
4537 if (status & SR_RXFRAMING)
4538 portp->stats.rxframing++;
4539 if (status & SR_RXOVERRUN)
4540 portp->stats.rxoverrun++;
4541 if (status & SR_RXBREAK)
4542 portp->stats.rxbreaks++;
4544 if ((tty != NULL) &&
4545 ((portp->rxignoremsk & status) == 0)) {
4546 if (portp->rxmarkmsk & status) {
4547 if (status & SR_RXBREAK) {
4549 if (portp->port.flags & ASYNC_SAK) {
4551 BRDENABLE(portp->brdnr, portp->pagenr);
4553 } else if (status & SR_RXPARITY)
4554 status = TTY_PARITY;
4555 else if (status & SR_RXFRAMING)
4557 else if(status & SR_RXOVERRUN)
4558 status = TTY_OVERRUN;
4564 tty_insert_flip_char(tty, ch, status);
4565 tty_schedule_flip(tty);
4568 portp->stats.rxtotal++;
4572 /*****************************************************************************/
4575 * Process all characters in the RX FIFO of the UART. Check all char
4576 * status bytes as well, and process as required. We need to check
4577 * all bytes in the FIFO, in case some more enter the FIFO while we
4578 * are here. To get the exact character error type we need to switch
4579 * into CHAR error mode (that is why we need to make sure we empty
4583 static void stl_sc26198rxbadchars(struct stlport *portp)
4585 unsigned char status, mr1;
4589 * To get the precise error type for each character we must switch
4590 * back into CHAR error mode.
4592 mr1 = stl_sc26198getreg(portp, MR1);
4593 stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK));
4595 while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) {
4596 stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR);
4597 ch = stl_sc26198getreg(portp, RXFIFO);
4598 stl_sc26198rxbadch(portp, status, ch);
4602 * To get correct interrupt class we must switch back into BLOCK
4605 stl_sc26198setreg(portp, MR1, mr1);
4608 /*****************************************************************************/
4611 * Other interrupt handler. This includes modem signals, flow
4612 * control actions, etc. Most stuff is left to off-level interrupt
4616 static void stl_sc26198otherisr(struct stlport *portp, unsigned int iack)
4618 unsigned char cir, ipr, xisr;
4620 pr_debug("stl_sc26198otherisr(portp=%p,iack=%x)\n", portp, iack);
4622 cir = stl_sc26198getglobreg(portp, CIR);
4624 switch (cir & CIR_SUBTYPEMASK) {
4626 ipr = stl_sc26198getreg(portp, IPR);
4627 if (ipr & IPR_DCDCHANGE) {
4628 stl_cd_change(portp);
4629 portp->stats.modem++;
4632 case CIR_SUBXONXOFF:
4633 xisr = stl_sc26198getreg(portp, XISR);
4634 if (xisr & XISR_RXXONGOT) {
4635 set_bit(ASYI_TXFLOWED, &portp->istate);
4636 portp->stats.txxoff++;
4638 if (xisr & XISR_RXXOFFGOT) {
4639 clear_bit(ASYI_TXFLOWED, &portp->istate);
4640 portp->stats.txxon++;
4644 stl_sc26198setreg(portp, SCCR, CR_BREAKRESET);
4645 stl_sc26198rxbadchars(portp);
4652 static void stl_free_isabrds(void)
4654 struct stlbrd *brdp;
4657 for (i = 0; i < stl_nrbrds; i++) {
4658 if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED))
4661 free_irq(brdp->irq, brdp);
4663 stl_cleanup_panels(brdp);
4665 release_region(brdp->ioaddr1, brdp->iosize1);
4666 if (brdp->iosize2 > 0)
4667 release_region(brdp->ioaddr2, brdp->iosize2);
4675 * Loadable module initialization stuff.
4677 static int __init stallion_module_init(void)
4679 struct stlbrd *brdp;
4680 struct stlconf conf;
4684 printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion);
4686 spin_lock_init(&stallion_lock);
4687 spin_lock_init(&brd_lock);
4689 stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS);
4695 stl_serial->owner = THIS_MODULE;
4696 stl_serial->driver_name = stl_drvname;
4697 stl_serial->name = "ttyE";
4698 stl_serial->major = STL_SERIALMAJOR;
4699 stl_serial->minor_start = 0;
4700 stl_serial->type = TTY_DRIVER_TYPE_SERIAL;
4701 stl_serial->subtype = SERIAL_TYPE_NORMAL;
4702 stl_serial->init_termios = stl_deftermios;
4703 stl_serial->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
4704 tty_set_operations(stl_serial, &stl_ops);
4706 retval = tty_register_driver(stl_serial);
4708 printk("STALLION: failed to register serial driver\n");
4713 * Find any dynamically supported boards. That is via module load
4716 for (i = stl_nrbrds; i < stl_nargs; i++) {
4717 memset(&conf, 0, sizeof(conf));
4718 if (stl_parsebrd(&conf, stl_brdsp[i]) == 0)
4720 if ((brdp = stl_allocbrd()) == NULL)
4723 brdp->brdtype = conf.brdtype;
4724 brdp->ioaddr1 = conf.ioaddr1;
4725 brdp->ioaddr2 = conf.ioaddr2;
4726 brdp->irq = conf.irq;
4727 brdp->irqtype = conf.irqtype;
4728 stl_brds[brdp->brdnr] = brdp;
4729 if (stl_brdinit(brdp)) {
4730 stl_brds[brdp->brdnr] = NULL;
4733 for (j = 0; j < brdp->nrports; j++)
4734 tty_register_device(stl_serial,
4735 brdp->brdnr * STL_MAXPORTS + j, NULL);
4740 /* this has to be _after_ isa finding because of locking */
4741 retval = pci_register_driver(&stl_pcidriver);
4742 if (retval && stl_nrbrds == 0) {
4743 printk(KERN_ERR "STALLION: can't register pci driver\n");
4748 * Set up a character driver for per board stuff. This is mainly used
4749 * to do stats ioctls on the ports.
4751 if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem))
4752 printk("STALLION: failed to register serial board device\n");
4754 stallion_class = class_create(THIS_MODULE, "staliomem");
4755 if (IS_ERR(stallion_class))
4756 printk("STALLION: failed to create class\n");
4757 for (i = 0; i < 4; i++)
4758 device_create_drvdata(stallion_class, NULL, MKDEV(STL_SIOMEMMAJOR, i),
4759 NULL, "staliomem%d", i);
4763 tty_unregister_driver(stl_serial);
4765 put_tty_driver(stl_serial);
4770 static void __exit stallion_module_exit(void)
4772 struct stlbrd *brdp;
4775 pr_debug("cleanup_module()\n");
4777 printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle,
4781 * Free up all allocated resources used by the ports. This includes
4782 * memory and interrupts. As part of this process we will also do
4783 * a hangup on every open port - to try to flush out any processes
4784 * hanging onto ports.
4786 for (i = 0; i < stl_nrbrds; i++) {
4787 if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED))
4789 for (j = 0; j < brdp->nrports; j++)
4790 tty_unregister_device(stl_serial,
4791 brdp->brdnr * STL_MAXPORTS + j);
4794 for (i = 0; i < 4; i++)
4795 device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i));
4796 unregister_chrdev(STL_SIOMEMMAJOR, "staliomem");
4797 class_destroy(stallion_class);
4799 pci_unregister_driver(&stl_pcidriver);
4803 tty_unregister_driver(stl_serial);
4804 put_tty_driver(stl_serial);
4807 module_init(stallion_module_init);
4808 module_exit(stallion_module_exit);
4810 MODULE_AUTHOR("Greg Ungerer");
4811 MODULE_DESCRIPTION("Stallion Multiport Serial Driver");
4812 MODULE_LICENSE("GPL");