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/sched.h>
31 #include <linux/slab.h>
32 #include <linux/interrupt.h>
33 #include <linux/tty.h>
34 #include <linux/tty_flip.h>
35 #include <linux/serial.h>
36 #include <linux/seq_file.h>
37 #include <linux/cd1400.h>
38 #include <linux/sc26198.h>
39 #include <linux/comstats.h>
40 #include <linux/stallion.h>
41 #include <linux/ioport.h>
42 #include <linux/init.h>
43 #include <linux/smp_lock.h>
44 #include <linux/device.h>
45 #include <linux/delay.h>
46 #include <linux/ctype.h>
49 #include <asm/uaccess.h>
51 #include <linux/pci.h>
53 /*****************************************************************************/
56 * Define different board types. Use the standard Stallion "assigned"
57 * board numbers. Boards supported in this driver are abbreviated as
58 * EIO = EasyIO and ECH = EasyConnection 8/32.
64 #define BRD_ECH64PCI 27
65 #define BRD_EASYIOPCI 28
71 unsigned long memaddr;
76 static unsigned int stl_nrbrds;
78 /*****************************************************************************/
81 * Define some important driver characteristics. Device major numbers
82 * allocated as per Linux Device Registry.
84 #ifndef STL_SIOMEMMAJOR
85 #define STL_SIOMEMMAJOR 28
87 #ifndef STL_SERIALMAJOR
88 #define STL_SERIALMAJOR 24
90 #ifndef STL_CALLOUTMAJOR
91 #define STL_CALLOUTMAJOR 25
95 * Set the TX buffer size. Bigger is better, but we don't want
96 * to chew too much memory with buffers!
98 #define STL_TXBUFLOW 512
99 #define STL_TXBUFSIZE 4096
101 /*****************************************************************************/
104 * Define our local driver identity first. Set up stuff to deal with
105 * all the local structures required by a serial tty driver.
107 static char *stl_drvtitle = "Stallion Multiport Serial Driver";
108 static char *stl_drvname = "stallion";
109 static char *stl_drvversion = "5.6.0";
111 static struct tty_driver *stl_serial;
114 * Define a local default termios struct. All ports will be created
115 * with this termios initially. Basically all it defines is a raw port
116 * at 9600, 8 data bits, 1 stop bit.
118 static struct ktermios stl_deftermios = {
119 .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL),
126 * Define global place to put buffer overflow characters.
128 static char stl_unwanted[SC26198_RXFIFOSIZE];
130 /*****************************************************************************/
132 static DEFINE_MUTEX(stl_brdslock);
133 static struct stlbrd *stl_brds[STL_MAXBRDS];
135 static const struct tty_port_operations stl_port_ops;
138 * Per board state flags. Used with the state field of the board struct.
139 * Not really much here!
141 #define BRD_FOUND 0x1
142 #define STL_PROBED 0x2
146 * Define the port structure istate flags. These set of flags are
147 * modified at interrupt time - so setting and reseting them needs
148 * to be atomic. Use the bit clear/setting routines for this.
150 #define ASYI_TXBUSY 1
152 #define ASYI_TXFLOWED 3
155 * Define an array of board names as printable strings. Handy for
156 * referencing boards when printing trace and stuff.
158 static char *stl_brdnames[] = {
190 /*****************************************************************************/
193 * Define some string labels for arguments passed from the module
194 * load line. These allow for easy board definitions, and easy
195 * modification of the io, memory and irq resoucres.
197 static unsigned int stl_nargs;
198 static char *board0[4];
199 static char *board1[4];
200 static char *board2[4];
201 static char *board3[4];
203 static char **stl_brdsp[] = {
211 * Define a set of common board names, and types. This is used to
212 * parse any module arguments.
219 { "easyio", BRD_EASYIO },
220 { "eio", BRD_EASYIO },
221 { "20", BRD_EASYIO },
222 { "ec8/32", BRD_ECH },
223 { "ec8/32-at", BRD_ECH },
224 { "ec8/32-isa", BRD_ECH },
226 { "echat", BRD_ECH },
228 { "ec8/32-mc", BRD_ECHMC },
229 { "ec8/32-mca", BRD_ECHMC },
230 { "echmc", BRD_ECHMC },
231 { "echmca", BRD_ECHMC },
233 { "ec8/32-pc", BRD_ECHPCI },
234 { "ec8/32-pci", BRD_ECHPCI },
235 { "26", BRD_ECHPCI },
236 { "ec8/64-pc", BRD_ECH64PCI },
237 { "ec8/64-pci", BRD_ECH64PCI },
238 { "ech-pci", BRD_ECH64PCI },
239 { "echpci", BRD_ECH64PCI },
240 { "echpc", BRD_ECH64PCI },
241 { "27", BRD_ECH64PCI },
242 { "easyio-pc", BRD_EASYIOPCI },
243 { "easyio-pci", BRD_EASYIOPCI },
244 { "eio-pci", BRD_EASYIOPCI },
245 { "eiopci", BRD_EASYIOPCI },
246 { "28", BRD_EASYIOPCI },
250 * Define the module agruments.
253 module_param_array(board0, charp, &stl_nargs, 0);
254 MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]");
255 module_param_array(board1, charp, &stl_nargs, 0);
256 MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]");
257 module_param_array(board2, charp, &stl_nargs, 0);
258 MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]");
259 module_param_array(board3, charp, &stl_nargs, 0);
260 MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]");
262 /*****************************************************************************/
265 * Hardware ID bits for the EasyIO and ECH boards. These defines apply
266 * to the directly accessible io ports of these boards (not the uarts -
267 * they are in cd1400.h and sc26198.h).
269 #define EIO_8PORTRS 0x04
270 #define EIO_4PORTRS 0x05
271 #define EIO_8PORTDI 0x00
272 #define EIO_8PORTM 0x06
274 #define EIO_IDBITMASK 0x07
276 #define EIO_BRDMASK 0xf0
279 #define ID_BRD16 0x30
281 #define EIO_INTRPEND 0x08
282 #define EIO_INTEDGE 0x00
283 #define EIO_INTLEVEL 0x08
287 #define ECH_IDBITMASK 0xe0
288 #define ECH_BRDENABLE 0x08
289 #define ECH_BRDDISABLE 0x00
290 #define ECH_INTENABLE 0x01
291 #define ECH_INTDISABLE 0x00
292 #define ECH_INTLEVEL 0x02
293 #define ECH_INTEDGE 0x00
294 #define ECH_INTRPEND 0x01
295 #define ECH_BRDRESET 0x01
297 #define ECHMC_INTENABLE 0x01
298 #define ECHMC_BRDRESET 0x02
300 #define ECH_PNLSTATUS 2
301 #define ECH_PNL16PORT 0x20
302 #define ECH_PNLIDMASK 0x07
303 #define ECH_PNLXPID 0x40
304 #define ECH_PNLINTRPEND 0x80
306 #define ECH_ADDR2MASK 0x1e0
309 * Define the vector mapping bits for the programmable interrupt board
310 * hardware. These bits encode the interrupt for the board to use - it
311 * is software selectable (except the EIO-8M).
313 static unsigned char stl_vecmap[] = {
314 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07,
315 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03
319 * Lock ordering is that you may not take stallion_lock holding
323 static spinlock_t brd_lock; /* Guard the board mapping */
324 static spinlock_t stallion_lock; /* Guard the tty driver */
327 * Set up enable and disable macros for the ECH boards. They require
328 * the secondary io address space to be activated and deactivated.
329 * This way all ECH boards can share their secondary io region.
330 * If this is an ECH-PCI board then also need to set the page pointer
331 * to point to the correct page.
333 #define BRDENABLE(brdnr,pagenr) \
334 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
335 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \
336 stl_brds[(brdnr)]->ioctrl); \
337 else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \
338 outb((pagenr), stl_brds[(brdnr)]->ioctrl);
340 #define BRDDISABLE(brdnr) \
341 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
342 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \
343 stl_brds[(brdnr)]->ioctrl);
345 #define STL_CD1400MAXBAUD 230400
346 #define STL_SC26198MAXBAUD 460800
348 #define STL_BAUDBASE 115200
349 #define STL_CLOSEDELAY (5 * HZ / 10)
351 /*****************************************************************************/
354 * Define the Stallion PCI vendor and device IDs.
356 #ifndef PCI_VENDOR_ID_STALLION
357 #define PCI_VENDOR_ID_STALLION 0x124d
359 #ifndef PCI_DEVICE_ID_ECHPCI832
360 #define PCI_DEVICE_ID_ECHPCI832 0x0000
362 #ifndef PCI_DEVICE_ID_ECHPCI864
363 #define PCI_DEVICE_ID_ECHPCI864 0x0002
365 #ifndef PCI_DEVICE_ID_EIOPCI
366 #define PCI_DEVICE_ID_EIOPCI 0x0003
370 * Define structure to hold all Stallion PCI boards.
373 static struct pci_device_id stl_pcibrds[] = {
374 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864),
375 .driver_data = BRD_ECH64PCI },
376 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI),
377 .driver_data = BRD_EASYIOPCI },
378 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832),
379 .driver_data = BRD_ECHPCI },
380 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410),
381 .driver_data = BRD_ECHPCI },
384 MODULE_DEVICE_TABLE(pci, stl_pcibrds);
386 /*****************************************************************************/
389 * Define macros to extract a brd/port number from a minor number.
391 #define MINOR2BRD(min) (((min) & 0xc0) >> 6)
392 #define MINOR2PORT(min) ((min) & 0x3f)
395 * Define a baud rate table that converts termios baud rate selector
396 * into the actual baud rate value. All baud rate calculations are
397 * based on the actual baud rate required.
399 static unsigned int stl_baudrates[] = {
400 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
401 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
404 /*****************************************************************************/
407 * Declare all those functions in this driver!
410 static long stl_memioctl(struct file *fp, unsigned int cmd, unsigned long arg);
411 static int stl_brdinit(struct stlbrd *brdp);
412 static int stl_getportstats(struct tty_struct *tty, struct stlport *portp, comstats_t __user *cp);
413 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp);
416 * CD1400 uart specific handling functions.
418 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value);
419 static int stl_cd1400getreg(struct stlport *portp, int regnr);
420 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value);
421 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp);
422 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
423 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp);
424 static int stl_cd1400getsignals(struct stlport *portp);
425 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts);
426 static void stl_cd1400ccrwait(struct stlport *portp);
427 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx);
428 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx);
429 static void stl_cd1400disableintrs(struct stlport *portp);
430 static void stl_cd1400sendbreak(struct stlport *portp, int len);
431 static void stl_cd1400flowctrl(struct stlport *portp, int state);
432 static void stl_cd1400sendflow(struct stlport *portp, int state);
433 static void stl_cd1400flush(struct stlport *portp);
434 static int stl_cd1400datastate(struct stlport *portp);
435 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase);
436 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase);
437 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr);
438 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr);
439 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr);
441 static inline int stl_cd1400breakisr(struct stlport *portp, int ioaddr);
444 * SC26198 uart specific handling functions.
446 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value);
447 static int stl_sc26198getreg(struct stlport *portp, int regnr);
448 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value);
449 static int stl_sc26198getglobreg(struct stlport *portp, int regnr);
450 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp);
451 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
452 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp);
453 static int stl_sc26198getsignals(struct stlport *portp);
454 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts);
455 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx);
456 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx);
457 static void stl_sc26198disableintrs(struct stlport *portp);
458 static void stl_sc26198sendbreak(struct stlport *portp, int len);
459 static void stl_sc26198flowctrl(struct stlport *portp, int state);
460 static void stl_sc26198sendflow(struct stlport *portp, int state);
461 static void stl_sc26198flush(struct stlport *portp);
462 static int stl_sc26198datastate(struct stlport *portp);
463 static void stl_sc26198wait(struct stlport *portp);
464 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty);
465 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase);
466 static void stl_sc26198txisr(struct stlport *port);
467 static void stl_sc26198rxisr(struct stlport *port, unsigned int iack);
468 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch);
469 static void stl_sc26198rxbadchars(struct stlport *portp);
470 static void stl_sc26198otherisr(struct stlport *port, unsigned int iack);
472 /*****************************************************************************/
475 * Generic UART support structure.
477 typedef struct uart {
478 int (*panelinit)(struct stlbrd *brdp, struct stlpanel *panelp);
479 void (*portinit)(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
480 void (*setport)(struct stlport *portp, struct ktermios *tiosp);
481 int (*getsignals)(struct stlport *portp);
482 void (*setsignals)(struct stlport *portp, int dtr, int rts);
483 void (*enablerxtx)(struct stlport *portp, int rx, int tx);
484 void (*startrxtx)(struct stlport *portp, int rx, int tx);
485 void (*disableintrs)(struct stlport *portp);
486 void (*sendbreak)(struct stlport *portp, int len);
487 void (*flowctrl)(struct stlport *portp, int state);
488 void (*sendflow)(struct stlport *portp, int state);
489 void (*flush)(struct stlport *portp);
490 int (*datastate)(struct stlport *portp);
491 void (*intr)(struct stlpanel *panelp, unsigned int iobase);
495 * Define some macros to make calling these functions nice and clean.
497 #define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit)
498 #define stl_portinit (* ((uart_t *) portp->uartp)->portinit)
499 #define stl_setport (* ((uart_t *) portp->uartp)->setport)
500 #define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals)
501 #define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals)
502 #define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx)
503 #define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx)
504 #define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs)
505 #define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak)
506 #define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl)
507 #define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow)
508 #define stl_flush (* ((uart_t *) portp->uartp)->flush)
509 #define stl_datastate (* ((uart_t *) portp->uartp)->datastate)
511 /*****************************************************************************/
514 * CD1400 UART specific data initialization.
516 static uart_t stl_cd1400uart = {
520 stl_cd1400getsignals,
521 stl_cd1400setsignals,
522 stl_cd1400enablerxtx,
524 stl_cd1400disableintrs,
534 * Define the offsets within the register bank of a cd1400 based panel.
535 * These io address offsets are common to the EasyIO board as well.
543 #define EREG_BANKSIZE 8
545 #define CD1400_CLK 25000000
546 #define CD1400_CLK8M 20000000
549 * Define the cd1400 baud rate clocks. These are used when calculating
550 * what clock and divisor to use for the required baud rate. Also
551 * define the maximum baud rate allowed, and the default base baud.
553 static int stl_cd1400clkdivs[] = {
554 CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4
557 /*****************************************************************************/
560 * SC26198 UART specific data initization.
562 static uart_t stl_sc26198uart = {
563 stl_sc26198panelinit,
566 stl_sc26198getsignals,
567 stl_sc26198setsignals,
568 stl_sc26198enablerxtx,
569 stl_sc26198startrxtx,
570 stl_sc26198disableintrs,
571 stl_sc26198sendbreak,
575 stl_sc26198datastate,
580 * Define the offsets within the register bank of a sc26198 based panel.
588 #define XP_BANKSIZE 4
591 * Define the sc26198 baud rate table. Offsets within the table
592 * represent the actual baud rate selector of sc26198 registers.
594 static unsigned int sc26198_baudtable[] = {
595 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600,
596 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200,
597 230400, 460800, 921600
600 #define SC26198_NRBAUDS ARRAY_SIZE(sc26198_baudtable)
602 /*****************************************************************************/
605 * Define the driver info for a user level control device. Used mainly
606 * to get at port stats - only not using the port device itself.
608 static const struct file_operations stl_fsiomem = {
609 .owner = THIS_MODULE,
610 .unlocked_ioctl = stl_memioctl,
611 .llseek = noop_llseek,
614 static struct class *stallion_class;
616 static void stl_cd_change(struct stlport *portp)
618 unsigned int oldsigs = portp->sigs;
619 struct tty_struct *tty = tty_port_tty_get(&portp->port);
624 portp->sigs = stl_getsignals(portp);
626 if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0))
627 wake_up_interruptible(&portp->port.open_wait);
629 if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0))
630 if (portp->port.flags & ASYNC_CHECK_CD)
636 * Check for any arguments passed in on the module load command line.
639 /*****************************************************************************/
642 * Parse the supplied argument string, into the board conf struct.
645 static int __init stl_parsebrd(struct stlconf *confp, char **argp)
650 pr_debug("stl_parsebrd(confp=%p,argp=%p)\n", confp, argp);
652 if ((argp[0] == NULL) || (*argp[0] == 0))
655 for (sp = argp[0], i = 0; (*sp != 0) && (i < 25); sp++, i++)
658 for (i = 0; i < ARRAY_SIZE(stl_brdstr); i++)
659 if (strcmp(stl_brdstr[i].name, argp[0]) == 0)
662 if (i == ARRAY_SIZE(stl_brdstr)) {
663 printk("STALLION: unknown board name, %s?\n", argp[0]);
667 confp->brdtype = stl_brdstr[i].type;
670 if ((argp[i] != NULL) && (*argp[i] != 0))
671 confp->ioaddr1 = simple_strtoul(argp[i], NULL, 0);
673 if (confp->brdtype == BRD_ECH) {
674 if ((argp[i] != NULL) && (*argp[i] != 0))
675 confp->ioaddr2 = simple_strtoul(argp[i], NULL, 0);
678 if ((argp[i] != NULL) && (*argp[i] != 0))
679 confp->irq = simple_strtoul(argp[i], NULL, 0);
683 /*****************************************************************************/
686 * Allocate a new board structure. Fill out the basic info in it.
689 static struct stlbrd *stl_allocbrd(void)
693 brdp = kzalloc(sizeof(struct stlbrd), GFP_KERNEL);
695 printk("STALLION: failed to allocate memory (size=%Zd)\n",
696 sizeof(struct stlbrd));
700 brdp->magic = STL_BOARDMAGIC;
704 /*****************************************************************************/
706 static int stl_activate(struct tty_port *port, struct tty_struct *tty)
708 struct stlport *portp = container_of(port, struct stlport, port);
709 if (!portp->tx.buf) {
710 portp->tx.buf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL);
713 portp->tx.head = portp->tx.buf;
714 portp->tx.tail = portp->tx.buf;
716 stl_setport(portp, tty->termios);
717 portp->sigs = stl_getsignals(portp);
718 stl_setsignals(portp, 1, 1);
719 stl_enablerxtx(portp, 1, 1);
720 stl_startrxtx(portp, 1, 0);
724 static int stl_open(struct tty_struct *tty, struct file *filp)
726 struct stlport *portp;
728 unsigned int minordev, brdnr, panelnr;
731 pr_debug("stl_open(tty=%p,filp=%p): device=%s\n", tty, filp, tty->name);
733 minordev = tty->index;
734 brdnr = MINOR2BRD(minordev);
735 if (brdnr >= stl_nrbrds)
737 brdp = stl_brds[brdnr];
741 minordev = MINOR2PORT(minordev);
742 for (portnr = -1, panelnr = 0; panelnr < STL_MAXPANELS; panelnr++) {
743 if (brdp->panels[panelnr] == NULL)
745 if (minordev < brdp->panels[panelnr]->nrports) {
749 minordev -= brdp->panels[panelnr]->nrports;
754 portp = brdp->panels[panelnr]->ports[portnr];
758 tty->driver_data = portp;
759 return tty_port_open(&portp->port, tty, filp);
763 /*****************************************************************************/
765 static int stl_carrier_raised(struct tty_port *port)
767 struct stlport *portp = container_of(port, struct stlport, port);
768 return (portp->sigs & TIOCM_CD) ? 1 : 0;
771 static void stl_dtr_rts(struct tty_port *port, int on)
773 struct stlport *portp = container_of(port, struct stlport, port);
774 /* Takes brd_lock internally */
775 stl_setsignals(portp, on, on);
778 /*****************************************************************************/
780 static void stl_flushbuffer(struct tty_struct *tty)
782 struct stlport *portp;
784 pr_debug("stl_flushbuffer(tty=%p)\n", tty);
786 portp = tty->driver_data;
794 /*****************************************************************************/
796 static void stl_waituntilsent(struct tty_struct *tty, int timeout)
798 struct stlport *portp;
801 pr_debug("stl_waituntilsent(tty=%p,timeout=%d)\n", tty, timeout);
803 portp = tty->driver_data;
809 tend = jiffies + timeout;
811 while (stl_datastate(portp)) {
812 if (signal_pending(current))
814 msleep_interruptible(20);
815 if (time_after_eq(jiffies, tend))
820 /*****************************************************************************/
822 static void stl_shutdown(struct tty_port *port)
824 struct stlport *portp = container_of(port, struct stlport, port);
825 stl_disableintrs(portp);
826 stl_enablerxtx(portp, 0, 0);
829 if (portp->tx.buf != NULL) {
830 kfree(portp->tx.buf);
831 portp->tx.buf = NULL;
832 portp->tx.head = NULL;
833 portp->tx.tail = NULL;
837 static void stl_close(struct tty_struct *tty, struct file *filp)
839 struct stlport*portp;
840 pr_debug("stl_close(tty=%p,filp=%p)\n", tty, filp);
842 portp = tty->driver_data;
845 tty_port_close(&portp->port, tty, filp);
848 /*****************************************************************************/
851 * Write routine. Take data and stuff it in to the TX ring queue.
852 * If transmit interrupts are not running then start them.
855 static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count)
857 struct stlport *portp;
858 unsigned int len, stlen;
859 unsigned char *chbuf;
862 pr_debug("stl_write(tty=%p,buf=%p,count=%d)\n", tty, buf, count);
864 portp = tty->driver_data;
867 if (portp->tx.buf == NULL)
871 * If copying direct from user space we must cater for page faults,
872 * causing us to "sleep" here for a while. To handle this copy in all
873 * the data we need now, into a local buffer. Then when we got it all
874 * copy it into the TX buffer.
876 chbuf = (unsigned char *) buf;
878 head = portp->tx.head;
879 tail = portp->tx.tail;
881 len = STL_TXBUFSIZE - (head - tail) - 1;
882 stlen = STL_TXBUFSIZE - (head - portp->tx.buf);
884 len = tail - head - 1;
888 len = min(len, (unsigned int)count);
891 stlen = min(len, stlen);
892 memcpy(head, chbuf, stlen);
897 if (head >= (portp->tx.buf + STL_TXBUFSIZE)) {
898 head = portp->tx.buf;
902 portp->tx.head = head;
904 clear_bit(ASYI_TXLOW, &portp->istate);
905 stl_startrxtx(portp, -1, 1);
910 /*****************************************************************************/
912 static int stl_putchar(struct tty_struct *tty, unsigned char ch)
914 struct stlport *portp;
918 pr_debug("stl_putchar(tty=%p,ch=%x)\n", tty, ch);
920 portp = tty->driver_data;
923 if (portp->tx.buf == NULL)
926 head = portp->tx.head;
927 tail = portp->tx.tail;
929 len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head);
934 if (head >= (portp->tx.buf + STL_TXBUFSIZE))
935 head = portp->tx.buf;
937 portp->tx.head = head;
941 /*****************************************************************************/
944 * If there are any characters in the buffer then make sure that TX
945 * interrupts are on and get'em out. Normally used after the putchar
946 * routine has been called.
949 static void stl_flushchars(struct tty_struct *tty)
951 struct stlport *portp;
953 pr_debug("stl_flushchars(tty=%p)\n", tty);
955 portp = tty->driver_data;
958 if (portp->tx.buf == NULL)
961 stl_startrxtx(portp, -1, 1);
964 /*****************************************************************************/
966 static int stl_writeroom(struct tty_struct *tty)
968 struct stlport *portp;
971 pr_debug("stl_writeroom(tty=%p)\n", tty);
973 portp = tty->driver_data;
976 if (portp->tx.buf == NULL)
979 head = portp->tx.head;
980 tail = portp->tx.tail;
981 return (head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1);
984 /*****************************************************************************/
987 * Return number of chars in the TX buffer. Normally we would just
988 * calculate the number of chars in the buffer and return that, but if
989 * the buffer is empty and TX interrupts are still on then we return
990 * that the buffer still has 1 char in it. This way whoever called us
991 * will not think that ALL chars have drained - since the UART still
992 * must have some chars in it (we are busy after all).
995 static int stl_charsinbuffer(struct tty_struct *tty)
997 struct stlport *portp;
1001 pr_debug("stl_charsinbuffer(tty=%p)\n", tty);
1003 portp = tty->driver_data;
1006 if (portp->tx.buf == NULL)
1009 head = portp->tx.head;
1010 tail = portp->tx.tail;
1011 size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
1012 if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate))
1017 /*****************************************************************************/
1020 * Generate the serial struct info.
1023 static int stl_getserial(struct stlport *portp, struct serial_struct __user *sp)
1025 struct serial_struct sio;
1026 struct stlbrd *brdp;
1028 pr_debug("stl_getserial(portp=%p,sp=%p)\n", portp, sp);
1030 memset(&sio, 0, sizeof(struct serial_struct));
1032 mutex_lock(&portp->port.mutex);
1033 sio.line = portp->portnr;
1034 sio.port = portp->ioaddr;
1035 sio.flags = portp->port.flags;
1036 sio.baud_base = portp->baud_base;
1037 sio.close_delay = portp->close_delay;
1038 sio.closing_wait = portp->closing_wait;
1039 sio.custom_divisor = portp->custom_divisor;
1041 if (portp->uartp == &stl_cd1400uart) {
1042 sio.type = PORT_CIRRUS;
1043 sio.xmit_fifo_size = CD1400_TXFIFOSIZE;
1045 sio.type = PORT_UNKNOWN;
1046 sio.xmit_fifo_size = SC26198_TXFIFOSIZE;
1049 brdp = stl_brds[portp->brdnr];
1051 sio.irq = brdp->irq;
1052 mutex_unlock(&portp->port.mutex);
1054 return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0;
1057 /*****************************************************************************/
1060 * Set port according to the serial struct info.
1061 * At this point we do not do any auto-configure stuff, so we will
1062 * just quietly ignore any requests to change irq, etc.
1065 static int stl_setserial(struct tty_struct *tty, struct serial_struct __user *sp)
1067 struct stlport * portp = tty->driver_data;
1068 struct serial_struct sio;
1070 pr_debug("stl_setserial(portp=%p,sp=%p)\n", portp, sp);
1072 if (copy_from_user(&sio, sp, sizeof(struct serial_struct)))
1074 mutex_lock(&portp->port.mutex);
1075 if (!capable(CAP_SYS_ADMIN)) {
1076 if ((sio.baud_base != portp->baud_base) ||
1077 (sio.close_delay != portp->close_delay) ||
1078 ((sio.flags & ~ASYNC_USR_MASK) !=
1079 (portp->port.flags & ~ASYNC_USR_MASK))) {
1080 mutex_unlock(&portp->port.mutex);
1085 portp->port.flags = (portp->port.flags & ~ASYNC_USR_MASK) |
1086 (sio.flags & ASYNC_USR_MASK);
1087 portp->baud_base = sio.baud_base;
1088 portp->close_delay = sio.close_delay;
1089 portp->closing_wait = sio.closing_wait;
1090 portp->custom_divisor = sio.custom_divisor;
1091 mutex_unlock(&portp->port.mutex);
1092 stl_setport(portp, tty->termios);
1096 /*****************************************************************************/
1098 static int stl_tiocmget(struct tty_struct *tty, struct file *file)
1100 struct stlport *portp;
1102 portp = tty->driver_data;
1105 if (tty->flags & (1 << TTY_IO_ERROR))
1108 return stl_getsignals(portp);
1111 static int stl_tiocmset(struct tty_struct *tty, struct file *file,
1112 unsigned int set, unsigned int clear)
1114 struct stlport *portp;
1115 int rts = -1, dtr = -1;
1117 portp = tty->driver_data;
1120 if (tty->flags & (1 << TTY_IO_ERROR))
1123 if (set & TIOCM_RTS)
1125 if (set & TIOCM_DTR)
1127 if (clear & TIOCM_RTS)
1129 if (clear & TIOCM_DTR)
1132 stl_setsignals(portp, dtr, rts);
1136 static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1138 struct stlport *portp;
1140 void __user *argp = (void __user *)arg;
1142 pr_debug("stl_ioctl(tty=%p,file=%p,cmd=%x,arg=%lx)\n", tty, file, cmd,
1145 portp = tty->driver_data;
1149 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1150 (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS))
1151 if (tty->flags & (1 << TTY_IO_ERROR))
1158 rc = stl_getserial(portp, argp);
1161 rc = stl_setserial(tty, argp);
1163 case COM_GETPORTSTATS:
1164 rc = stl_getportstats(tty, portp, argp);
1166 case COM_CLRPORTSTATS:
1167 rc = stl_clrportstats(portp, argp);
1173 case TIOCSERGSTRUCT:
1174 case TIOCSERGETMULTI:
1175 case TIOCSERSETMULTI:
1183 /*****************************************************************************/
1186 * Start the transmitter again. Just turn TX interrupts back on.
1189 static void stl_start(struct tty_struct *tty)
1191 struct stlport *portp;
1193 pr_debug("stl_start(tty=%p)\n", tty);
1195 portp = tty->driver_data;
1198 stl_startrxtx(portp, -1, 1);
1201 /*****************************************************************************/
1203 static void stl_settermios(struct tty_struct *tty, struct ktermios *old)
1205 struct stlport *portp;
1206 struct ktermios *tiosp;
1208 pr_debug("stl_settermios(tty=%p,old=%p)\n", tty, old);
1210 portp = tty->driver_data;
1214 tiosp = tty->termios;
1215 if ((tiosp->c_cflag == old->c_cflag) &&
1216 (tiosp->c_iflag == old->c_iflag))
1219 stl_setport(portp, tiosp);
1220 stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0),
1222 if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) {
1223 tty->hw_stopped = 0;
1226 if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
1227 wake_up_interruptible(&portp->port.open_wait);
1230 /*****************************************************************************/
1233 * Attempt to flow control who ever is sending us data. Based on termios
1234 * settings use software or/and hardware flow control.
1237 static void stl_throttle(struct tty_struct *tty)
1239 struct stlport *portp;
1241 pr_debug("stl_throttle(tty=%p)\n", tty);
1243 portp = tty->driver_data;
1246 stl_flowctrl(portp, 0);
1249 /*****************************************************************************/
1252 * Unflow control the device sending us data...
1255 static void stl_unthrottle(struct tty_struct *tty)
1257 struct stlport *portp;
1259 pr_debug("stl_unthrottle(tty=%p)\n", tty);
1261 portp = tty->driver_data;
1264 stl_flowctrl(portp, 1);
1267 /*****************************************************************************/
1270 * Stop the transmitter. Basically to do this we will just turn TX
1274 static void stl_stop(struct tty_struct *tty)
1276 struct stlport *portp;
1278 pr_debug("stl_stop(tty=%p)\n", tty);
1280 portp = tty->driver_data;
1283 stl_startrxtx(portp, -1, 0);
1286 /*****************************************************************************/
1289 * Hangup this port. This is pretty much like closing the port, only
1290 * a little more brutal. No waiting for data to drain. Shutdown the
1291 * port and maybe drop signals.
1294 static void stl_hangup(struct tty_struct *tty)
1296 struct stlport *portp = tty->driver_data;
1297 pr_debug("stl_hangup(tty=%p)\n", tty);
1301 tty_port_hangup(&portp->port);
1304 /*****************************************************************************/
1306 static int stl_breakctl(struct tty_struct *tty, int state)
1308 struct stlport *portp;
1310 pr_debug("stl_breakctl(tty=%p,state=%d)\n", tty, state);
1312 portp = tty->driver_data;
1316 stl_sendbreak(portp, ((state == -1) ? 1 : 2));
1320 /*****************************************************************************/
1322 static void stl_sendxchar(struct tty_struct *tty, char ch)
1324 struct stlport *portp;
1326 pr_debug("stl_sendxchar(tty=%p,ch=%x)\n", tty, ch);
1328 portp = tty->driver_data;
1332 if (ch == STOP_CHAR(tty))
1333 stl_sendflow(portp, 0);
1334 else if (ch == START_CHAR(tty))
1335 stl_sendflow(portp, 1);
1337 stl_putchar(tty, ch);
1340 static void stl_portinfo(struct seq_file *m, struct stlport *portp, int portnr)
1345 seq_printf(m, "%d: uart:%s tx:%d rx:%d",
1346 portnr, (portp->hwid == 1) ? "SC26198" : "CD1400",
1347 (int) portp->stats.txtotal, (int) portp->stats.rxtotal);
1349 if (portp->stats.rxframing)
1350 seq_printf(m, " fe:%d", (int) portp->stats.rxframing);
1351 if (portp->stats.rxparity)
1352 seq_printf(m, " pe:%d", (int) portp->stats.rxparity);
1353 if (portp->stats.rxbreaks)
1354 seq_printf(m, " brk:%d", (int) portp->stats.rxbreaks);
1355 if (portp->stats.rxoverrun)
1356 seq_printf(m, " oe:%d", (int) portp->stats.rxoverrun);
1358 sigs = stl_getsignals(portp);
1360 if (sigs & TIOCM_RTS) {
1361 seq_printf(m, "%c%s", sep, "RTS");
1364 if (sigs & TIOCM_CTS) {
1365 seq_printf(m, "%c%s", sep, "CTS");
1368 if (sigs & TIOCM_DTR) {
1369 seq_printf(m, "%c%s", sep, "DTR");
1372 if (sigs & TIOCM_CD) {
1373 seq_printf(m, "%c%s", sep, "DCD");
1376 if (sigs & TIOCM_DSR) {
1377 seq_printf(m, "%c%s", sep, "DSR");
1383 /*****************************************************************************/
1386 * Port info, read from the /proc file system.
1389 static int stl_proc_show(struct seq_file *m, void *v)
1391 struct stlbrd *brdp;
1392 struct stlpanel *panelp;
1393 struct stlport *portp;
1394 unsigned int brdnr, panelnr, portnr;
1399 seq_printf(m, "%s: version %s\n", stl_drvtitle, stl_drvversion);
1402 * We scan through for each board, panel and port. The offset is
1403 * calculated on the fly, and irrelevant ports are skipped.
1405 for (brdnr = 0; brdnr < stl_nrbrds; brdnr++) {
1406 brdp = stl_brds[brdnr];
1409 if (brdp->state == 0)
1412 totalport = brdnr * STL_MAXPORTS;
1413 for (panelnr = 0; panelnr < brdp->nrpanels; panelnr++) {
1414 panelp = brdp->panels[panelnr];
1418 for (portnr = 0; portnr < panelp->nrports; portnr++,
1420 portp = panelp->ports[portnr];
1423 stl_portinfo(m, portp, totalport);
1430 static int stl_proc_open(struct inode *inode, struct file *file)
1432 return single_open(file, stl_proc_show, NULL);
1435 static const struct file_operations stl_proc_fops = {
1436 .owner = THIS_MODULE,
1437 .open = stl_proc_open,
1439 .llseek = seq_lseek,
1440 .release = single_release,
1443 /*****************************************************************************/
1446 * All board interrupts are vectored through here first. This code then
1447 * calls off to the approrpriate board interrupt handlers.
1450 static irqreturn_t stl_intr(int irq, void *dev_id)
1452 struct stlbrd *brdp = dev_id;
1454 pr_debug("stl_intr(brdp=%p,irq=%d)\n", brdp, brdp->irq);
1456 return IRQ_RETVAL((* brdp->isr)(brdp));
1459 /*****************************************************************************/
1462 * Interrupt service routine for EasyIO board types.
1465 static int stl_eiointr(struct stlbrd *brdp)
1467 struct stlpanel *panelp;
1468 unsigned int iobase;
1471 spin_lock(&brd_lock);
1472 panelp = brdp->panels[0];
1473 iobase = panelp->iobase;
1474 while (inb(brdp->iostatus) & EIO_INTRPEND) {
1476 (* panelp->isr)(panelp, iobase);
1478 spin_unlock(&brd_lock);
1482 /*****************************************************************************/
1485 * Interrupt service routine for ECH-AT board types.
1488 static int stl_echatintr(struct stlbrd *brdp)
1490 struct stlpanel *panelp;
1491 unsigned int ioaddr, bnknr;
1494 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
1496 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1498 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1499 ioaddr = brdp->bnkstataddr[bnknr];
1500 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1501 panelp = brdp->bnk2panel[bnknr];
1502 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1507 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
1512 /*****************************************************************************/
1515 * Interrupt service routine for ECH-MCA board types.
1518 static int stl_echmcaintr(struct stlbrd *brdp)
1520 struct stlpanel *panelp;
1521 unsigned int ioaddr, bnknr;
1524 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1526 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1527 ioaddr = brdp->bnkstataddr[bnknr];
1528 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1529 panelp = brdp->bnk2panel[bnknr];
1530 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1537 /*****************************************************************************/
1540 * Interrupt service routine for ECH-PCI board types.
1543 static int stl_echpciintr(struct stlbrd *brdp)
1545 struct stlpanel *panelp;
1546 unsigned int ioaddr, bnknr, recheck;
1551 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1552 outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl);
1553 ioaddr = brdp->bnkstataddr[bnknr];
1554 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1555 panelp = brdp->bnk2panel[bnknr];
1556 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1567 /*****************************************************************************/
1570 * Interrupt service routine for ECH-8/64-PCI board types.
1573 static int stl_echpci64intr(struct stlbrd *brdp)
1575 struct stlpanel *panelp;
1576 unsigned int ioaddr, bnknr;
1579 while (inb(brdp->ioctrl) & 0x1) {
1581 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1582 ioaddr = brdp->bnkstataddr[bnknr];
1583 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1584 panelp = brdp->bnk2panel[bnknr];
1585 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1593 /*****************************************************************************/
1596 * Initialize all the ports on a panel.
1599 static int __devinit stl_initports(struct stlbrd *brdp, struct stlpanel *panelp)
1601 struct stlport *portp;
1605 pr_debug("stl_initports(brdp=%p,panelp=%p)\n", brdp, panelp);
1607 chipmask = stl_panelinit(brdp, panelp);
1610 * All UART's are initialized (if found!). Now go through and setup
1611 * each ports data structures.
1613 for (i = 0; i < panelp->nrports; i++) {
1614 portp = kzalloc(sizeof(struct stlport), GFP_KERNEL);
1616 printk("STALLION: failed to allocate memory "
1617 "(size=%Zd)\n", sizeof(struct stlport));
1620 tty_port_init(&portp->port);
1621 portp->port.ops = &stl_port_ops;
1622 portp->magic = STL_PORTMAGIC;
1624 portp->brdnr = panelp->brdnr;
1625 portp->panelnr = panelp->panelnr;
1626 portp->uartp = panelp->uartp;
1627 portp->clk = brdp->clk;
1628 portp->baud_base = STL_BAUDBASE;
1629 portp->close_delay = STL_CLOSEDELAY;
1630 portp->closing_wait = 30 * HZ;
1631 init_waitqueue_head(&portp->port.open_wait);
1632 init_waitqueue_head(&portp->port.close_wait);
1633 portp->stats.brd = portp->brdnr;
1634 portp->stats.panel = portp->panelnr;
1635 portp->stats.port = portp->portnr;
1636 panelp->ports[i] = portp;
1637 stl_portinit(brdp, panelp, portp);
1643 static void stl_cleanup_panels(struct stlbrd *brdp)
1645 struct stlpanel *panelp;
1646 struct stlport *portp;
1648 struct tty_struct *tty;
1650 for (j = 0; j < STL_MAXPANELS; j++) {
1651 panelp = brdp->panels[j];
1654 for (k = 0; k < STL_PORTSPERPANEL; k++) {
1655 portp = panelp->ports[k];
1658 tty = tty_port_tty_get(&portp->port);
1663 kfree(portp->tx.buf);
1670 /*****************************************************************************/
1673 * Try to find and initialize an EasyIO board.
1676 static int __devinit stl_initeio(struct stlbrd *brdp)
1678 struct stlpanel *panelp;
1679 unsigned int status;
1683 pr_debug("stl_initeio(brdp=%p)\n", brdp);
1685 brdp->ioctrl = brdp->ioaddr1 + 1;
1686 brdp->iostatus = brdp->ioaddr1 + 2;
1688 status = inb(brdp->iostatus);
1689 if ((status & EIO_IDBITMASK) == EIO_MK3)
1693 * Handle board specific stuff now. The real difference is PCI
1696 if (brdp->brdtype == BRD_EASYIOPCI) {
1697 brdp->iosize1 = 0x80;
1698 brdp->iosize2 = 0x80;
1699 name = "serial(EIO-PCI)";
1700 outb(0x41, (brdp->ioaddr2 + 0x4c));
1703 name = "serial(EIO)";
1704 if ((brdp->irq < 0) || (brdp->irq > 15) ||
1705 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
1706 printk("STALLION: invalid irq=%d for brd=%d\n",
1707 brdp->irq, brdp->brdnr);
1711 outb((stl_vecmap[brdp->irq] | EIO_0WS |
1712 ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)),
1717 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
1718 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
1719 "%x conflicts with another device\n", brdp->brdnr,
1724 if (brdp->iosize2 > 0)
1725 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
1726 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
1727 "address %x conflicts with another device\n",
1728 brdp->brdnr, brdp->ioaddr2);
1729 printk(KERN_WARNING "STALLION: Warning, also "
1730 "releasing board %d I/O address %x \n",
1731 brdp->brdnr, brdp->ioaddr1);
1736 * Everything looks OK, so let's go ahead and probe for the hardware.
1738 brdp->clk = CD1400_CLK;
1739 brdp->isr = stl_eiointr;
1742 switch (status & EIO_IDBITMASK) {
1744 brdp->clk = CD1400_CLK8M;
1754 switch (status & EIO_BRDMASK) {
1773 * We have verified that the board is actually present, so now we
1774 * can complete the setup.
1777 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
1779 printk(KERN_WARNING "STALLION: failed to allocate memory "
1780 "(size=%Zd)\n", sizeof(struct stlpanel));
1785 panelp->magic = STL_PANELMAGIC;
1786 panelp->brdnr = brdp->brdnr;
1787 panelp->panelnr = 0;
1788 panelp->nrports = brdp->nrports;
1789 panelp->iobase = brdp->ioaddr1;
1790 panelp->hwid = status;
1791 if ((status & EIO_IDBITMASK) == EIO_MK3) {
1792 panelp->uartp = &stl_sc26198uart;
1793 panelp->isr = stl_sc26198intr;
1795 panelp->uartp = &stl_cd1400uart;
1796 panelp->isr = stl_cd1400eiointr;
1799 brdp->panels[0] = panelp;
1801 brdp->state |= BRD_FOUND;
1802 brdp->hwid = status;
1803 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
1804 printk("STALLION: failed to register interrupt "
1805 "routine for %s irq=%d\n", name, brdp->irq);
1812 stl_cleanup_panels(brdp);
1814 if (brdp->iosize2 > 0)
1815 release_region(brdp->ioaddr2, brdp->iosize2);
1817 release_region(brdp->ioaddr1, brdp->iosize1);
1822 /*****************************************************************************/
1825 * Try to find an ECH board and initialize it. This code is capable of
1826 * dealing with all types of ECH board.
1829 static int __devinit stl_initech(struct stlbrd *brdp)
1831 struct stlpanel *panelp;
1832 unsigned int status, nxtid, ioaddr, conflict, panelnr, banknr, i;
1836 pr_debug("stl_initech(brdp=%p)\n", brdp);
1842 * Set up the initial board register contents for boards. This varies a
1843 * bit between the different board types. So we need to handle each
1844 * separately. Also do a check that the supplied IRQ is good.
1846 switch (brdp->brdtype) {
1849 brdp->isr = stl_echatintr;
1850 brdp->ioctrl = brdp->ioaddr1 + 1;
1851 brdp->iostatus = brdp->ioaddr1 + 1;
1852 status = inb(brdp->iostatus);
1853 if ((status & ECH_IDBITMASK) != ECH_ID) {
1857 if ((brdp->irq < 0) || (brdp->irq > 15) ||
1858 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
1859 printk("STALLION: invalid irq=%d for brd=%d\n",
1860 brdp->irq, brdp->brdnr);
1864 status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1);
1865 status |= (stl_vecmap[brdp->irq] << 1);
1866 outb((status | ECH_BRDRESET), brdp->ioaddr1);
1867 brdp->ioctrlval = ECH_INTENABLE |
1868 ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE);
1869 for (i = 0; i < 10; i++)
1870 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
1873 name = "serial(EC8/32)";
1874 outb(status, brdp->ioaddr1);
1878 brdp->isr = stl_echmcaintr;
1879 brdp->ioctrl = brdp->ioaddr1 + 0x20;
1880 brdp->iostatus = brdp->ioctrl;
1881 status = inb(brdp->iostatus);
1882 if ((status & ECH_IDBITMASK) != ECH_ID) {
1886 if ((brdp->irq < 0) || (brdp->irq > 15) ||
1887 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
1888 printk("STALLION: invalid irq=%d for brd=%d\n",
1889 brdp->irq, brdp->brdnr);
1893 outb(ECHMC_BRDRESET, brdp->ioctrl);
1894 outb(ECHMC_INTENABLE, brdp->ioctrl);
1896 name = "serial(EC8/32-MC)";
1900 brdp->isr = stl_echpciintr;
1901 brdp->ioctrl = brdp->ioaddr1 + 2;
1904 name = "serial(EC8/32-PCI)";
1908 brdp->isr = stl_echpci64intr;
1909 brdp->ioctrl = brdp->ioaddr2 + 0x40;
1910 outb(0x43, (brdp->ioaddr1 + 0x4c));
1911 brdp->iosize1 = 0x80;
1912 brdp->iosize2 = 0x80;
1913 name = "serial(EC8/64-PCI)";
1917 printk("STALLION: unknown board type=%d\n", brdp->brdtype);
1923 * Check boards for possible IO address conflicts and return fail status
1924 * if an IO conflict found.
1927 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
1928 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
1929 "%x conflicts with another device\n", brdp->brdnr,
1934 if (brdp->iosize2 > 0)
1935 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
1936 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
1937 "address %x conflicts with another device\n",
1938 brdp->brdnr, brdp->ioaddr2);
1939 printk(KERN_WARNING "STALLION: Warning, also "
1940 "releasing board %d I/O address %x \n",
1941 brdp->brdnr, brdp->ioaddr1);
1946 * Scan through the secondary io address space looking for panels.
1947 * As we find'em allocate and initialize panel structures for each.
1949 brdp->clk = CD1400_CLK;
1950 brdp->hwid = status;
1952 ioaddr = brdp->ioaddr2;
1957 for (i = 0; i < STL_MAXPANELS; i++) {
1958 if (brdp->brdtype == BRD_ECHPCI) {
1959 outb(nxtid, brdp->ioctrl);
1960 ioaddr = brdp->ioaddr2;
1962 status = inb(ioaddr + ECH_PNLSTATUS);
1963 if ((status & ECH_PNLIDMASK) != nxtid)
1965 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
1967 printk("STALLION: failed to allocate memory "
1968 "(size=%Zd)\n", sizeof(struct stlpanel));
1972 panelp->magic = STL_PANELMAGIC;
1973 panelp->brdnr = brdp->brdnr;
1974 panelp->panelnr = panelnr;
1975 panelp->iobase = ioaddr;
1976 panelp->pagenr = nxtid;
1977 panelp->hwid = status;
1978 brdp->bnk2panel[banknr] = panelp;
1979 brdp->bnkpageaddr[banknr] = nxtid;
1980 brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS;
1982 if (status & ECH_PNLXPID) {
1983 panelp->uartp = &stl_sc26198uart;
1984 panelp->isr = stl_sc26198intr;
1985 if (status & ECH_PNL16PORT) {
1986 panelp->nrports = 16;
1987 brdp->bnk2panel[banknr] = panelp;
1988 brdp->bnkpageaddr[banknr] = nxtid;
1989 brdp->bnkstataddr[banknr++] = ioaddr + 4 +
1992 panelp->nrports = 8;
1994 panelp->uartp = &stl_cd1400uart;
1995 panelp->isr = stl_cd1400echintr;
1996 if (status & ECH_PNL16PORT) {
1997 panelp->nrports = 16;
1998 panelp->ackmask = 0x80;
1999 if (brdp->brdtype != BRD_ECHPCI)
2000 ioaddr += EREG_BANKSIZE;
2001 brdp->bnk2panel[banknr] = panelp;
2002 brdp->bnkpageaddr[banknr] = ++nxtid;
2003 brdp->bnkstataddr[banknr++] = ioaddr +
2006 panelp->nrports = 8;
2007 panelp->ackmask = 0xc0;
2012 ioaddr += EREG_BANKSIZE;
2013 brdp->nrports += panelp->nrports;
2014 brdp->panels[panelnr++] = panelp;
2015 if ((brdp->brdtype != BRD_ECHPCI) &&
2016 (ioaddr >= (brdp->ioaddr2 + brdp->iosize2))) {
2022 brdp->nrpanels = panelnr;
2023 brdp->nrbnks = banknr;
2024 if (brdp->brdtype == BRD_ECH)
2025 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
2027 brdp->state |= BRD_FOUND;
2028 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
2029 printk("STALLION: failed to register interrupt "
2030 "routine for %s irq=%d\n", name, brdp->irq);
2037 stl_cleanup_panels(brdp);
2038 if (brdp->iosize2 > 0)
2039 release_region(brdp->ioaddr2, brdp->iosize2);
2041 release_region(brdp->ioaddr1, brdp->iosize1);
2046 /*****************************************************************************/
2049 * Initialize and configure the specified board.
2050 * Scan through all the boards in the configuration and see what we
2051 * can find. Handle EIO and the ECH boards a little differently here
2052 * since the initial search and setup is very different.
2055 static int __devinit stl_brdinit(struct stlbrd *brdp)
2059 pr_debug("stl_brdinit(brdp=%p)\n", brdp);
2061 switch (brdp->brdtype) {
2064 retval = stl_initeio(brdp);
2072 retval = stl_initech(brdp);
2077 printk("STALLION: board=%d is unknown board type=%d\n",
2078 brdp->brdnr, brdp->brdtype);
2083 if ((brdp->state & BRD_FOUND) == 0) {
2084 printk("STALLION: %s board not found, board=%d io=%x irq=%d\n",
2085 stl_brdnames[brdp->brdtype], brdp->brdnr,
2086 brdp->ioaddr1, brdp->irq);
2090 for (i = 0; i < STL_MAXPANELS; i++)
2091 if (brdp->panels[i] != NULL)
2092 stl_initports(brdp, brdp->panels[i]);
2094 printk("STALLION: %s found, board=%d io=%x irq=%d "
2095 "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype],
2096 brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels,
2101 free_irq(brdp->irq, brdp);
2103 stl_cleanup_panels(brdp);
2105 release_region(brdp->ioaddr1, brdp->iosize1);
2106 if (brdp->iosize2 > 0)
2107 release_region(brdp->ioaddr2, brdp->iosize2);
2112 /*****************************************************************************/
2115 * Find the next available board number that is free.
2118 static int __devinit stl_getbrdnr(void)
2122 for (i = 0; i < STL_MAXBRDS; i++)
2123 if (stl_brds[i] == NULL) {
2124 if (i >= stl_nrbrds)
2132 /*****************************************************************************/
2134 * We have a Stallion board. Allocate a board structure and
2135 * initialize it. Read its IO and IRQ resources from PCI
2136 * configuration space.
2139 static int __devinit stl_pciprobe(struct pci_dev *pdev,
2140 const struct pci_device_id *ent)
2142 struct stlbrd *brdp;
2143 unsigned int i, brdtype = ent->driver_data;
2144 int brdnr, retval = -ENODEV;
2146 if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE)
2149 retval = pci_enable_device(pdev);
2152 brdp = stl_allocbrd();
2157 mutex_lock(&stl_brdslock);
2158 brdnr = stl_getbrdnr();
2160 dev_err(&pdev->dev, "too many boards found, "
2161 "maximum supported %d\n", STL_MAXBRDS);
2162 mutex_unlock(&stl_brdslock);
2166 brdp->brdnr = (unsigned int)brdnr;
2167 stl_brds[brdp->brdnr] = brdp;
2168 mutex_unlock(&stl_brdslock);
2170 brdp->brdtype = brdtype;
2171 brdp->state |= STL_PROBED;
2174 * We have all resources from the board, so let's setup the actual
2175 * board structure now.
2179 brdp->ioaddr2 = pci_resource_start(pdev, 0);
2180 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2183 brdp->ioaddr2 = pci_resource_start(pdev, 2);
2184 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2187 brdp->ioaddr1 = pci_resource_start(pdev, 2);
2188 brdp->ioaddr2 = pci_resource_start(pdev, 1);
2191 dev_err(&pdev->dev, "unknown PCI board type=%u\n", brdtype);
2195 brdp->irq = pdev->irq;
2196 retval = stl_brdinit(brdp);
2200 pci_set_drvdata(pdev, brdp);
2202 for (i = 0; i < brdp->nrports; i++)
2203 tty_register_device(stl_serial,
2204 brdp->brdnr * STL_MAXPORTS + i, &pdev->dev);
2208 stl_brds[brdp->brdnr] = NULL;
2215 static void __devexit stl_pciremove(struct pci_dev *pdev)
2217 struct stlbrd *brdp = pci_get_drvdata(pdev);
2220 free_irq(brdp->irq, brdp);
2222 stl_cleanup_panels(brdp);
2224 release_region(brdp->ioaddr1, brdp->iosize1);
2225 if (brdp->iosize2 > 0)
2226 release_region(brdp->ioaddr2, brdp->iosize2);
2228 for (i = 0; i < brdp->nrports; i++)
2229 tty_unregister_device(stl_serial,
2230 brdp->brdnr * STL_MAXPORTS + i);
2232 stl_brds[brdp->brdnr] = NULL;
2236 static struct pci_driver stl_pcidriver = {
2238 .id_table = stl_pcibrds,
2239 .probe = stl_pciprobe,
2240 .remove = __devexit_p(stl_pciremove)
2243 /*****************************************************************************/
2246 * Return the board stats structure to user app.
2249 static int stl_getbrdstats(combrd_t __user *bp)
2251 combrd_t stl_brdstats;
2252 struct stlbrd *brdp;
2253 struct stlpanel *panelp;
2256 if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t)))
2258 if (stl_brdstats.brd >= STL_MAXBRDS)
2260 brdp = stl_brds[stl_brdstats.brd];
2264 memset(&stl_brdstats, 0, sizeof(combrd_t));
2265 stl_brdstats.brd = brdp->brdnr;
2266 stl_brdstats.type = brdp->brdtype;
2267 stl_brdstats.hwid = brdp->hwid;
2268 stl_brdstats.state = brdp->state;
2269 stl_brdstats.ioaddr = brdp->ioaddr1;
2270 stl_brdstats.ioaddr2 = brdp->ioaddr2;
2271 stl_brdstats.irq = brdp->irq;
2272 stl_brdstats.nrpanels = brdp->nrpanels;
2273 stl_brdstats.nrports = brdp->nrports;
2274 for (i = 0; i < brdp->nrpanels; i++) {
2275 panelp = brdp->panels[i];
2276 stl_brdstats.panels[i].panel = i;
2277 stl_brdstats.panels[i].hwid = panelp->hwid;
2278 stl_brdstats.panels[i].nrports = panelp->nrports;
2281 return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0;
2284 /*****************************************************************************/
2287 * Resolve the referenced port number into a port struct pointer.
2290 static struct stlport *stl_getport(int brdnr, int panelnr, int portnr)
2292 struct stlbrd *brdp;
2293 struct stlpanel *panelp;
2295 if (brdnr < 0 || brdnr >= STL_MAXBRDS)
2297 brdp = stl_brds[brdnr];
2300 if (panelnr < 0 || (unsigned int)panelnr >= brdp->nrpanels)
2302 panelp = brdp->panels[panelnr];
2305 if (portnr < 0 || (unsigned int)portnr >= panelp->nrports)
2307 return panelp->ports[portnr];
2310 /*****************************************************************************/
2313 * Return the port stats structure to user app. A NULL port struct
2314 * pointer passed in means that we need to find out from the app
2315 * what port to get stats for (used through board control device).
2318 static int stl_getportstats(struct tty_struct *tty, struct stlport *portp, comstats_t __user *cp)
2320 comstats_t stl_comstats;
2321 unsigned char *head, *tail;
2322 unsigned long flags;
2325 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2327 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2333 mutex_lock(&portp->port.mutex);
2334 portp->stats.state = portp->istate;
2335 portp->stats.flags = portp->port.flags;
2336 portp->stats.hwid = portp->hwid;
2338 portp->stats.ttystate = 0;
2339 portp->stats.cflags = 0;
2340 portp->stats.iflags = 0;
2341 portp->stats.oflags = 0;
2342 portp->stats.lflags = 0;
2343 portp->stats.rxbuffered = 0;
2345 spin_lock_irqsave(&stallion_lock, flags);
2346 if (tty != NULL && portp->port.tty == tty) {
2347 portp->stats.ttystate = tty->flags;
2348 /* No longer available as a statistic */
2349 portp->stats.rxbuffered = 1; /*tty->flip.count; */
2350 if (tty->termios != NULL) {
2351 portp->stats.cflags = tty->termios->c_cflag;
2352 portp->stats.iflags = tty->termios->c_iflag;
2353 portp->stats.oflags = tty->termios->c_oflag;
2354 portp->stats.lflags = tty->termios->c_lflag;
2357 spin_unlock_irqrestore(&stallion_lock, flags);
2359 head = portp->tx.head;
2360 tail = portp->tx.tail;
2361 portp->stats.txbuffered = (head >= tail) ? (head - tail) :
2362 (STL_TXBUFSIZE - (tail - head));
2364 portp->stats.signals = (unsigned long) stl_getsignals(portp);
2365 mutex_unlock(&portp->port.mutex);
2367 return copy_to_user(cp, &portp->stats,
2368 sizeof(comstats_t)) ? -EFAULT : 0;
2371 /*****************************************************************************/
2374 * Clear the port stats structure. We also return it zeroed out...
2377 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp)
2379 comstats_t stl_comstats;
2382 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2384 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2390 mutex_lock(&portp->port.mutex);
2391 memset(&portp->stats, 0, sizeof(comstats_t));
2392 portp->stats.brd = portp->brdnr;
2393 portp->stats.panel = portp->panelnr;
2394 portp->stats.port = portp->portnr;
2395 mutex_unlock(&portp->port.mutex);
2396 return copy_to_user(cp, &portp->stats,
2397 sizeof(comstats_t)) ? -EFAULT : 0;
2400 /*****************************************************************************/
2403 * Return the entire driver ports structure to a user app.
2406 static int stl_getportstruct(struct stlport __user *arg)
2408 struct stlport stl_dummyport;
2409 struct stlport *portp;
2411 if (copy_from_user(&stl_dummyport, arg, sizeof(struct stlport)))
2413 portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr,
2414 stl_dummyport.portnr);
2417 return copy_to_user(arg, portp, sizeof(struct stlport)) ? -EFAULT : 0;
2420 /*****************************************************************************/
2423 * Return the entire driver board structure to a user app.
2426 static int stl_getbrdstruct(struct stlbrd __user *arg)
2428 struct stlbrd stl_dummybrd;
2429 struct stlbrd *brdp;
2431 if (copy_from_user(&stl_dummybrd, arg, sizeof(struct stlbrd)))
2433 if (stl_dummybrd.brdnr >= STL_MAXBRDS)
2435 brdp = stl_brds[stl_dummybrd.brdnr];
2438 return copy_to_user(arg, brdp, sizeof(struct stlbrd)) ? -EFAULT : 0;
2441 /*****************************************************************************/
2444 * The "staliomem" device is also required to do some special operations
2445 * on the board and/or ports. In this driver it is mostly used for stats
2449 static long stl_memioctl(struct file *fp, unsigned int cmd, unsigned long arg)
2452 void __user *argp = (void __user *)arg;
2454 pr_debug("stl_memioctl(fp=%p,cmd=%x,arg=%lx)\n", fp, cmd,arg);
2456 brdnr = iminor(fp->f_dentry->d_inode);
2457 if (brdnr >= STL_MAXBRDS)
2462 case COM_GETPORTSTATS:
2463 rc = stl_getportstats(NULL, NULL, argp);
2465 case COM_CLRPORTSTATS:
2466 rc = stl_clrportstats(NULL, argp);
2468 case COM_GETBRDSTATS:
2469 rc = stl_getbrdstats(argp);
2472 rc = stl_getportstruct(argp);
2475 rc = stl_getbrdstruct(argp);
2484 static const struct tty_operations stl_ops = {
2488 .put_char = stl_putchar,
2489 .flush_chars = stl_flushchars,
2490 .write_room = stl_writeroom,
2491 .chars_in_buffer = stl_charsinbuffer,
2493 .set_termios = stl_settermios,
2494 .throttle = stl_throttle,
2495 .unthrottle = stl_unthrottle,
2498 .hangup = stl_hangup,
2499 .flush_buffer = stl_flushbuffer,
2500 .break_ctl = stl_breakctl,
2501 .wait_until_sent = stl_waituntilsent,
2502 .send_xchar = stl_sendxchar,
2503 .tiocmget = stl_tiocmget,
2504 .tiocmset = stl_tiocmset,
2505 .proc_fops = &stl_proc_fops,
2508 static const struct tty_port_operations stl_port_ops = {
2509 .carrier_raised = stl_carrier_raised,
2510 .dtr_rts = stl_dtr_rts,
2511 .activate = stl_activate,
2512 .shutdown = stl_shutdown,
2515 /*****************************************************************************/
2516 /* CD1400 HARDWARE FUNCTIONS */
2517 /*****************************************************************************/
2520 * These functions get/set/update the registers of the cd1400 UARTs.
2521 * Access to the cd1400 registers is via an address/data io port pair.
2522 * (Maybe should make this inline...)
2525 static int stl_cd1400getreg(struct stlport *portp, int regnr)
2527 outb((regnr + portp->uartaddr), portp->ioaddr);
2528 return inb(portp->ioaddr + EREG_DATA);
2531 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value)
2533 outb(regnr + portp->uartaddr, portp->ioaddr);
2534 outb(value, portp->ioaddr + EREG_DATA);
2537 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value)
2539 outb(regnr + portp->uartaddr, portp->ioaddr);
2540 if (inb(portp->ioaddr + EREG_DATA) != value) {
2541 outb(value, portp->ioaddr + EREG_DATA);
2547 /*****************************************************************************/
2550 * Inbitialize the UARTs in a panel. We don't care what sort of board
2551 * these ports are on - since the port io registers are almost
2552 * identical when dealing with ports.
2555 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
2559 int nrchips, uartaddr, ioaddr;
2560 unsigned long flags;
2562 pr_debug("stl_panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
2564 spin_lock_irqsave(&brd_lock, flags);
2565 BRDENABLE(panelp->brdnr, panelp->pagenr);
2568 * Check that each chip is present and started up OK.
2571 nrchips = panelp->nrports / CD1400_PORTS;
2572 for (i = 0; i < nrchips; i++) {
2573 if (brdp->brdtype == BRD_ECHPCI) {
2574 outb((panelp->pagenr + (i >> 1)), brdp->ioctrl);
2575 ioaddr = panelp->iobase;
2577 ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1));
2578 uartaddr = (i & 0x01) ? 0x080 : 0;
2579 outb((GFRCR + uartaddr), ioaddr);
2580 outb(0, (ioaddr + EREG_DATA));
2581 outb((CCR + uartaddr), ioaddr);
2582 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2583 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2584 outb((GFRCR + uartaddr), ioaddr);
2585 for (j = 0; j < CCR_MAXWAIT; j++)
2586 if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0)
2589 if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) {
2590 printk("STALLION: cd1400 not responding, "
2591 "brd=%d panel=%d chip=%d\n",
2592 panelp->brdnr, panelp->panelnr, i);
2595 chipmask |= (0x1 << i);
2596 outb((PPR + uartaddr), ioaddr);
2597 outb(PPR_SCALAR, (ioaddr + EREG_DATA));
2600 BRDDISABLE(panelp->brdnr);
2601 spin_unlock_irqrestore(&brd_lock, flags);
2605 /*****************************************************************************/
2608 * Initialize hardware specific port registers.
2611 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
2613 unsigned long flags;
2614 pr_debug("stl_cd1400portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
2617 if ((brdp == NULL) || (panelp == NULL) ||
2621 spin_lock_irqsave(&brd_lock, flags);
2622 portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) ||
2623 (portp->portnr < 8)) ? 0 : EREG_BANKSIZE);
2624 portp->uartaddr = (portp->portnr & 0x04) << 5;
2625 portp->pagenr = panelp->pagenr + (portp->portnr >> 3);
2627 BRDENABLE(portp->brdnr, portp->pagenr);
2628 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2629 stl_cd1400setreg(portp, LIVR, (portp->portnr << 3));
2630 portp->hwid = stl_cd1400getreg(portp, GFRCR);
2631 BRDDISABLE(portp->brdnr);
2632 spin_unlock_irqrestore(&brd_lock, flags);
2635 /*****************************************************************************/
2638 * Wait for the command register to be ready. We will poll this,
2639 * since it won't usually take too long to be ready.
2642 static void stl_cd1400ccrwait(struct stlport *portp)
2646 for (i = 0; i < CCR_MAXWAIT; i++)
2647 if (stl_cd1400getreg(portp, CCR) == 0)
2650 printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n",
2651 portp->portnr, portp->panelnr, portp->brdnr);
2654 /*****************************************************************************/
2657 * Set up the cd1400 registers for a port based on the termios port
2661 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp)
2663 struct stlbrd *brdp;
2664 unsigned long flags;
2665 unsigned int clkdiv, baudrate;
2666 unsigned char cor1, cor2, cor3;
2667 unsigned char cor4, cor5, ccr;
2668 unsigned char srer, sreron, sreroff;
2669 unsigned char mcor1, mcor2, rtpr;
2670 unsigned char clk, div;
2686 brdp = stl_brds[portp->brdnr];
2691 * Set up the RX char ignore mask with those RX error types we
2692 * can ignore. We can get the cd1400 to help us out a little here,
2693 * it will ignore parity errors and breaks for us.
2695 portp->rxignoremsk = 0;
2696 if (tiosp->c_iflag & IGNPAR) {
2697 portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN);
2698 cor1 |= COR1_PARIGNORE;
2700 if (tiosp->c_iflag & IGNBRK) {
2701 portp->rxignoremsk |= ST_BREAK;
2702 cor4 |= COR4_IGNBRK;
2705 portp->rxmarkmsk = ST_OVERRUN;
2706 if (tiosp->c_iflag & (INPCK | PARMRK))
2707 portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING);
2708 if (tiosp->c_iflag & BRKINT)
2709 portp->rxmarkmsk |= ST_BREAK;
2712 * Go through the char size, parity and stop bits and set all the
2713 * option register appropriately.
2715 switch (tiosp->c_cflag & CSIZE) {
2730 if (tiosp->c_cflag & CSTOPB)
2735 if (tiosp->c_cflag & PARENB) {
2736 if (tiosp->c_cflag & PARODD)
2737 cor1 |= (COR1_PARENB | COR1_PARODD);
2739 cor1 |= (COR1_PARENB | COR1_PAREVEN);
2741 cor1 |= COR1_PARNONE;
2745 * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing
2746 * space for hardware flow control and the like. This should be set to
2747 * VMIN. Also here we will set the RX data timeout to 10ms - this should
2748 * really be based on VTIME.
2750 cor3 |= FIFO_RXTHRESHOLD;
2754 * Calculate the baud rate timers. For now we will just assume that
2755 * the input and output baud are the same. Could have used a baud
2756 * table here, but this way we can generate virtually any baud rate
2759 baudrate = tiosp->c_cflag & CBAUD;
2760 if (baudrate & CBAUDEX) {
2761 baudrate &= ~CBAUDEX;
2762 if ((baudrate < 1) || (baudrate > 4))
2763 tiosp->c_cflag &= ~CBAUDEX;
2767 baudrate = stl_baudrates[baudrate];
2768 if ((tiosp->c_cflag & CBAUD) == B38400) {
2769 if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2771 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2773 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2775 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2777 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
2778 baudrate = (portp->baud_base / portp->custom_divisor);
2780 if (baudrate > STL_CD1400MAXBAUD)
2781 baudrate = STL_CD1400MAXBAUD;
2784 for (clk = 0; clk < CD1400_NUMCLKS; clk++) {
2785 clkdiv = (portp->clk / stl_cd1400clkdivs[clk]) / baudrate;
2789 div = (unsigned char) clkdiv;
2793 * Check what form of modem signaling is required and set it up.
2795 if ((tiosp->c_cflag & CLOCAL) == 0) {
2798 sreron |= SRER_MODEM;
2799 portp->port.flags |= ASYNC_CHECK_CD;
2801 portp->port.flags &= ~ASYNC_CHECK_CD;
2804 * Setup cd1400 enhanced modes if we can. In particular we want to
2805 * handle as much of the flow control as possible automatically. As
2806 * well as saving a few CPU cycles it will also greatly improve flow
2807 * control reliability.
2809 if (tiosp->c_iflag & IXON) {
2812 if (tiosp->c_iflag & IXANY)
2816 if (tiosp->c_cflag & CRTSCTS) {
2818 mcor1 |= FIFO_RTSTHRESHOLD;
2822 * All cd1400 register values calculated so go through and set
2826 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
2827 portp->portnr, portp->panelnr, portp->brdnr);
2828 pr_debug(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n",
2829 cor1, cor2, cor3, cor4, cor5);
2830 pr_debug(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n",
2831 mcor1, mcor2, rtpr, sreron, sreroff);
2832 pr_debug(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div);
2833 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
2834 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
2835 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
2837 spin_lock_irqsave(&brd_lock, flags);
2838 BRDENABLE(portp->brdnr, portp->pagenr);
2839 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3));
2840 srer = stl_cd1400getreg(portp, SRER);
2841 stl_cd1400setreg(portp, SRER, 0);
2842 if (stl_cd1400updatereg(portp, COR1, cor1))
2844 if (stl_cd1400updatereg(portp, COR2, cor2))
2846 if (stl_cd1400updatereg(portp, COR3, cor3))
2849 stl_cd1400ccrwait(portp);
2850 stl_cd1400setreg(portp, CCR, CCR_CORCHANGE);
2852 stl_cd1400setreg(portp, COR4, cor4);
2853 stl_cd1400setreg(portp, COR5, cor5);
2854 stl_cd1400setreg(portp, MCOR1, mcor1);
2855 stl_cd1400setreg(portp, MCOR2, mcor2);
2857 stl_cd1400setreg(portp, TCOR, clk);
2858 stl_cd1400setreg(portp, TBPR, div);
2859 stl_cd1400setreg(portp, RCOR, clk);
2860 stl_cd1400setreg(portp, RBPR, div);
2862 stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]);
2863 stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]);
2864 stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]);
2865 stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]);
2866 stl_cd1400setreg(portp, RTPR, rtpr);
2867 mcor1 = stl_cd1400getreg(portp, MSVR1);
2868 if (mcor1 & MSVR1_DCD)
2869 portp->sigs |= TIOCM_CD;
2871 portp->sigs &= ~TIOCM_CD;
2872 stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron));
2873 BRDDISABLE(portp->brdnr);
2874 spin_unlock_irqrestore(&brd_lock, flags);
2877 /*****************************************************************************/
2880 * Set the state of the DTR and RTS signals.
2883 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts)
2885 unsigned char msvr1, msvr2;
2886 unsigned long flags;
2888 pr_debug("stl_cd1400setsignals(portp=%p,dtr=%d,rts=%d)\n",
2898 spin_lock_irqsave(&brd_lock, flags);
2899 BRDENABLE(portp->brdnr, portp->pagenr);
2900 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2902 stl_cd1400setreg(portp, MSVR2, msvr2);
2904 stl_cd1400setreg(portp, MSVR1, msvr1);
2905 BRDDISABLE(portp->brdnr);
2906 spin_unlock_irqrestore(&brd_lock, flags);
2909 /*****************************************************************************/
2912 * Return the state of the signals.
2915 static int stl_cd1400getsignals(struct stlport *portp)
2917 unsigned char msvr1, msvr2;
2918 unsigned long flags;
2921 pr_debug("stl_cd1400getsignals(portp=%p)\n", portp);
2923 spin_lock_irqsave(&brd_lock, flags);
2924 BRDENABLE(portp->brdnr, portp->pagenr);
2925 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2926 msvr1 = stl_cd1400getreg(portp, MSVR1);
2927 msvr2 = stl_cd1400getreg(portp, MSVR2);
2928 BRDDISABLE(portp->brdnr);
2929 spin_unlock_irqrestore(&brd_lock, flags);
2932 sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0;
2933 sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0;
2934 sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0;
2935 sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0;
2937 sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0;
2938 sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0;
2945 /*****************************************************************************/
2948 * Enable/Disable the Transmitter and/or Receiver.
2951 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx)
2954 unsigned long flags;
2956 pr_debug("stl_cd1400enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
2961 ccr |= CCR_TXDISABLE;
2963 ccr |= CCR_TXENABLE;
2965 ccr |= CCR_RXDISABLE;
2967 ccr |= CCR_RXENABLE;
2969 spin_lock_irqsave(&brd_lock, flags);
2970 BRDENABLE(portp->brdnr, portp->pagenr);
2971 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2972 stl_cd1400ccrwait(portp);
2973 stl_cd1400setreg(portp, CCR, ccr);
2974 stl_cd1400ccrwait(portp);
2975 BRDDISABLE(portp->brdnr);
2976 spin_unlock_irqrestore(&brd_lock, flags);
2979 /*****************************************************************************/
2982 * Start/stop the Transmitter and/or Receiver.
2985 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx)
2987 unsigned char sreron, sreroff;
2988 unsigned long flags;
2990 pr_debug("stl_cd1400startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
2995 sreroff |= (SRER_TXDATA | SRER_TXEMPTY);
2997 sreron |= SRER_TXDATA;
2999 sreron |= SRER_TXEMPTY;
3001 sreroff |= SRER_RXDATA;
3003 sreron |= SRER_RXDATA;
3005 spin_lock_irqsave(&brd_lock, flags);
3006 BRDENABLE(portp->brdnr, portp->pagenr);
3007 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3008 stl_cd1400setreg(portp, SRER,
3009 ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron));
3010 BRDDISABLE(portp->brdnr);
3012 set_bit(ASYI_TXBUSY, &portp->istate);
3013 spin_unlock_irqrestore(&brd_lock, flags);
3016 /*****************************************************************************/
3019 * Disable all interrupts from this port.
3022 static void stl_cd1400disableintrs(struct stlport *portp)
3024 unsigned long flags;
3026 pr_debug("stl_cd1400disableintrs(portp=%p)\n", portp);
3028 spin_lock_irqsave(&brd_lock, flags);
3029 BRDENABLE(portp->brdnr, portp->pagenr);
3030 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3031 stl_cd1400setreg(portp, SRER, 0);
3032 BRDDISABLE(portp->brdnr);
3033 spin_unlock_irqrestore(&brd_lock, flags);
3036 /*****************************************************************************/
3038 static void stl_cd1400sendbreak(struct stlport *portp, int len)
3040 unsigned long flags;
3042 pr_debug("stl_cd1400sendbreak(portp=%p,len=%d)\n", portp, len);
3044 spin_lock_irqsave(&brd_lock, flags);
3045 BRDENABLE(portp->brdnr, portp->pagenr);
3046 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3047 stl_cd1400setreg(portp, SRER,
3048 ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) |
3050 BRDDISABLE(portp->brdnr);
3051 portp->brklen = len;
3053 portp->stats.txbreaks++;
3054 spin_unlock_irqrestore(&brd_lock, flags);
3057 /*****************************************************************************/
3060 * Take flow control actions...
3063 static void stl_cd1400flowctrl(struct stlport *portp, int state)
3065 struct tty_struct *tty;
3066 unsigned long flags;
3068 pr_debug("stl_cd1400flowctrl(portp=%p,state=%x)\n", portp, state);
3072 tty = tty_port_tty_get(&portp->port);
3076 spin_lock_irqsave(&brd_lock, flags);
3077 BRDENABLE(portp->brdnr, portp->pagenr);
3078 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3081 if (tty->termios->c_iflag & IXOFF) {
3082 stl_cd1400ccrwait(portp);
3083 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3084 portp->stats.rxxon++;
3085 stl_cd1400ccrwait(portp);
3088 * Question: should we return RTS to what it was before? It may
3089 * have been set by an ioctl... Suppose not, since if you have
3090 * hardware flow control set then it is pretty silly to go and
3091 * set the RTS line by hand.
3093 if (tty->termios->c_cflag & CRTSCTS) {
3094 stl_cd1400setreg(portp, MCOR1,
3095 (stl_cd1400getreg(portp, MCOR1) |
3096 FIFO_RTSTHRESHOLD));
3097 stl_cd1400setreg(portp, MSVR2, MSVR2_RTS);
3098 portp->stats.rxrtson++;
3101 if (tty->termios->c_iflag & IXOFF) {
3102 stl_cd1400ccrwait(portp);
3103 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3104 portp->stats.rxxoff++;
3105 stl_cd1400ccrwait(portp);
3107 if (tty->termios->c_cflag & CRTSCTS) {
3108 stl_cd1400setreg(portp, MCOR1,
3109 (stl_cd1400getreg(portp, MCOR1) & 0xf0));
3110 stl_cd1400setreg(portp, MSVR2, 0);
3111 portp->stats.rxrtsoff++;
3115 BRDDISABLE(portp->brdnr);
3116 spin_unlock_irqrestore(&brd_lock, flags);
3120 /*****************************************************************************/
3123 * Send a flow control character...
3126 static void stl_cd1400sendflow(struct stlport *portp, int state)
3128 struct tty_struct *tty;
3129 unsigned long flags;
3131 pr_debug("stl_cd1400sendflow(portp=%p,state=%x)\n", portp, state);
3135 tty = tty_port_tty_get(&portp->port);
3139 spin_lock_irqsave(&brd_lock, flags);
3140 BRDENABLE(portp->brdnr, portp->pagenr);
3141 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3143 stl_cd1400ccrwait(portp);
3144 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3145 portp->stats.rxxon++;
3146 stl_cd1400ccrwait(portp);
3148 stl_cd1400ccrwait(portp);
3149 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3150 portp->stats.rxxoff++;
3151 stl_cd1400ccrwait(portp);
3153 BRDDISABLE(portp->brdnr);
3154 spin_unlock_irqrestore(&brd_lock, flags);
3158 /*****************************************************************************/
3160 static void stl_cd1400flush(struct stlport *portp)
3162 unsigned long flags;
3164 pr_debug("stl_cd1400flush(portp=%p)\n", portp);
3169 spin_lock_irqsave(&brd_lock, flags);
3170 BRDENABLE(portp->brdnr, portp->pagenr);
3171 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3172 stl_cd1400ccrwait(portp);
3173 stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO);
3174 stl_cd1400ccrwait(portp);
3175 portp->tx.tail = portp->tx.head;
3176 BRDDISABLE(portp->brdnr);
3177 spin_unlock_irqrestore(&brd_lock, flags);
3180 /*****************************************************************************/
3183 * Return the current state of data flow on this port. This is only
3184 * really interesting when determining if data has fully completed
3185 * transmission or not... This is easy for the cd1400, it accurately
3186 * maintains the busy port flag.
3189 static int stl_cd1400datastate(struct stlport *portp)
3191 pr_debug("stl_cd1400datastate(portp=%p)\n", portp);
3196 return test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0;
3199 /*****************************************************************************/
3202 * Interrupt service routine for cd1400 EasyIO boards.
3205 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase)
3207 unsigned char svrtype;
3209 pr_debug("stl_cd1400eiointr(panelp=%p,iobase=%x)\n", panelp, iobase);
3211 spin_lock(&brd_lock);
3213 svrtype = inb(iobase + EREG_DATA);
3214 if (panelp->nrports > 4) {
3215 outb((SVRR + 0x80), iobase);
3216 svrtype |= inb(iobase + EREG_DATA);
3219 if (svrtype & SVRR_RX)
3220 stl_cd1400rxisr(panelp, iobase);
3221 else if (svrtype & SVRR_TX)
3222 stl_cd1400txisr(panelp, iobase);
3223 else if (svrtype & SVRR_MDM)
3224 stl_cd1400mdmisr(panelp, iobase);
3226 spin_unlock(&brd_lock);
3229 /*****************************************************************************/
3232 * Interrupt service routine for cd1400 panels.
3235 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase)
3237 unsigned char svrtype;
3239 pr_debug("stl_cd1400echintr(panelp=%p,iobase=%x)\n", panelp, iobase);
3242 svrtype = inb(iobase + EREG_DATA);
3243 outb((SVRR + 0x80), iobase);
3244 svrtype |= inb(iobase + EREG_DATA);
3245 if (svrtype & SVRR_RX)
3246 stl_cd1400rxisr(panelp, iobase);
3247 else if (svrtype & SVRR_TX)
3248 stl_cd1400txisr(panelp, iobase);
3249 else if (svrtype & SVRR_MDM)
3250 stl_cd1400mdmisr(panelp, iobase);
3254 /*****************************************************************************/
3257 * Unfortunately we need to handle breaks in the TX data stream, since
3258 * this is the only way to generate them on the cd1400.
3261 static int stl_cd1400breakisr(struct stlport *portp, int ioaddr)
3263 if (portp->brklen == 1) {
3264 outb((COR2 + portp->uartaddr), ioaddr);
3265 outb((inb(ioaddr + EREG_DATA) | COR2_ETC),
3266 (ioaddr + EREG_DATA));
3267 outb((TDR + portp->uartaddr), ioaddr);
3268 outb(ETC_CMD, (ioaddr + EREG_DATA));
3269 outb(ETC_STARTBREAK, (ioaddr + EREG_DATA));
3270 outb((SRER + portp->uartaddr), ioaddr);
3271 outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)),
3272 (ioaddr + EREG_DATA));
3274 } else if (portp->brklen > 1) {
3275 outb((TDR + portp->uartaddr), ioaddr);
3276 outb(ETC_CMD, (ioaddr + EREG_DATA));
3277 outb(ETC_STOPBREAK, (ioaddr + EREG_DATA));
3281 outb((COR2 + portp->uartaddr), ioaddr);
3282 outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC),
3283 (ioaddr + EREG_DATA));
3289 /*****************************************************************************/
3292 * Transmit interrupt handler. This has gotta be fast! Handling TX
3293 * chars is pretty simple, stuff as many as possible from the TX buffer
3294 * into the cd1400 FIFO. Must also handle TX breaks here, since they
3295 * are embedded as commands in the data stream. Oh no, had to use a goto!
3296 * This could be optimized more, will do when I get time...
3297 * In practice it is possible that interrupts are enabled but that the
3298 * port has been hung up. Need to handle not having any TX buffer here,
3299 * this is done by using the side effect that head and tail will also
3300 * be NULL if the buffer has been freed.
3303 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr)
3305 struct stlport *portp;
3308 unsigned char ioack, srer;
3309 struct tty_struct *tty;
3311 pr_debug("stl_cd1400txisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3313 ioack = inb(ioaddr + EREG_TXACK);
3314 if (((ioack & panelp->ackmask) != 0) ||
3315 ((ioack & ACK_TYPMASK) != ACK_TYPTX)) {
3316 printk("STALLION: bad TX interrupt ack value=%x\n", ioack);
3319 portp = panelp->ports[(ioack >> 3)];
3322 * Unfortunately we need to handle breaks in the data stream, since
3323 * this is the only way to generate them on the cd1400. Do it now if
3324 * a break is to be sent.
3326 if (portp->brklen != 0)
3327 if (stl_cd1400breakisr(portp, ioaddr))
3330 head = portp->tx.head;
3331 tail = portp->tx.tail;
3332 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
3333 if ((len == 0) || ((len < STL_TXBUFLOW) &&
3334 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
3335 set_bit(ASYI_TXLOW, &portp->istate);
3336 tty = tty_port_tty_get(&portp->port);
3344 outb((SRER + portp->uartaddr), ioaddr);
3345 srer = inb(ioaddr + EREG_DATA);
3346 if (srer & SRER_TXDATA) {
3347 srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY;
3349 srer &= ~(SRER_TXDATA | SRER_TXEMPTY);
3350 clear_bit(ASYI_TXBUSY, &portp->istate);
3352 outb(srer, (ioaddr + EREG_DATA));
3354 len = min(len, CD1400_TXFIFOSIZE);
3355 portp->stats.txtotal += len;
3356 stlen = min_t(unsigned int, len,
3357 (portp->tx.buf + STL_TXBUFSIZE) - tail);
3358 outb((TDR + portp->uartaddr), ioaddr);
3359 outsb((ioaddr + EREG_DATA), tail, stlen);
3362 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
3363 tail = portp->tx.buf;
3365 outsb((ioaddr + EREG_DATA), tail, len);
3368 portp->tx.tail = tail;
3372 outb((EOSRR + portp->uartaddr), ioaddr);
3373 outb(0, (ioaddr + EREG_DATA));
3376 /*****************************************************************************/
3379 * Receive character interrupt handler. Determine if we have good chars
3380 * or bad chars and then process appropriately. Good chars are easy
3381 * just shove the lot into the RX buffer and set all status byte to 0.
3382 * If a bad RX char then process as required. This routine needs to be
3383 * fast! In practice it is possible that we get an interrupt on a port
3384 * that is closed. This can happen on hangups - since they completely
3385 * shutdown a port not in user context. Need to handle this case.
3388 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr)
3390 struct stlport *portp;
3391 struct tty_struct *tty;
3392 unsigned int ioack, len, buflen;
3393 unsigned char status;
3396 pr_debug("stl_cd1400rxisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3398 ioack = inb(ioaddr + EREG_RXACK);
3399 if ((ioack & panelp->ackmask) != 0) {
3400 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3403 portp = panelp->ports[(ioack >> 3)];
3404 tty = tty_port_tty_get(&portp->port);
3406 if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) {
3407 outb((RDCR + portp->uartaddr), ioaddr);
3408 len = inb(ioaddr + EREG_DATA);
3409 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
3410 len = min_t(unsigned int, len, sizeof(stl_unwanted));
3411 outb((RDSR + portp->uartaddr), ioaddr);
3412 insb((ioaddr + EREG_DATA), &stl_unwanted[0], len);
3413 portp->stats.rxlost += len;
3414 portp->stats.rxtotal += len;
3416 len = min(len, buflen);
3419 outb((RDSR + portp->uartaddr), ioaddr);
3420 tty_prepare_flip_string(tty, &ptr, len);
3421 insb((ioaddr + EREG_DATA), ptr, len);
3422 tty_schedule_flip(tty);
3423 portp->stats.rxtotal += len;
3426 } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) {
3427 outb((RDSR + portp->uartaddr), ioaddr);
3428 status = inb(ioaddr + EREG_DATA);
3429 ch = inb(ioaddr + EREG_DATA);
3430 if (status & ST_PARITY)
3431 portp->stats.rxparity++;
3432 if (status & ST_FRAMING)
3433 portp->stats.rxframing++;
3434 if (status & ST_OVERRUN)
3435 portp->stats.rxoverrun++;
3436 if (status & ST_BREAK)
3437 portp->stats.rxbreaks++;
3438 if (status & ST_SCHARMASK) {
3439 if ((status & ST_SCHARMASK) == ST_SCHAR1)
3440 portp->stats.txxon++;
3441 if ((status & ST_SCHARMASK) == ST_SCHAR2)
3442 portp->stats.txxoff++;
3445 if (tty != NULL && (portp->rxignoremsk & status) == 0) {
3446 if (portp->rxmarkmsk & status) {
3447 if (status & ST_BREAK) {
3449 if (portp->port.flags & ASYNC_SAK) {
3451 BRDENABLE(portp->brdnr, portp->pagenr);
3453 } else if (status & ST_PARITY)
3454 status = TTY_PARITY;
3455 else if (status & ST_FRAMING)
3457 else if(status & ST_OVERRUN)
3458 status = TTY_OVERRUN;
3463 tty_insert_flip_char(tty, ch, status);
3464 tty_schedule_flip(tty);
3467 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3474 outb((EOSRR + portp->uartaddr), ioaddr);
3475 outb(0, (ioaddr + EREG_DATA));
3478 /*****************************************************************************/
3481 * Modem interrupt handler. The is called when the modem signal line
3482 * (DCD) has changed state. Leave most of the work to the off-level
3483 * processing routine.
3486 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr)
3488 struct stlport *portp;
3492 pr_debug("stl_cd1400mdmisr(panelp=%p)\n", panelp);
3494 ioack = inb(ioaddr + EREG_MDACK);
3495 if (((ioack & panelp->ackmask) != 0) ||
3496 ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) {
3497 printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack);
3500 portp = panelp->ports[(ioack >> 3)];
3502 outb((MISR + portp->uartaddr), ioaddr);
3503 misr = inb(ioaddr + EREG_DATA);
3504 if (misr & MISR_DCD) {
3505 stl_cd_change(portp);
3506 portp->stats.modem++;
3509 outb((EOSRR + portp->uartaddr), ioaddr);
3510 outb(0, (ioaddr + EREG_DATA));
3513 /*****************************************************************************/
3514 /* SC26198 HARDWARE FUNCTIONS */
3515 /*****************************************************************************/
3518 * These functions get/set/update the registers of the sc26198 UARTs.
3519 * Access to the sc26198 registers is via an address/data io port pair.
3520 * (Maybe should make this inline...)
3523 static int stl_sc26198getreg(struct stlport *portp, int regnr)
3525 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3526 return inb(portp->ioaddr + XP_DATA);
3529 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value)
3531 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3532 outb(value, (portp->ioaddr + XP_DATA));
3535 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value)
3537 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3538 if (inb(portp->ioaddr + XP_DATA) != value) {
3539 outb(value, (portp->ioaddr + XP_DATA));
3545 /*****************************************************************************/
3548 * Functions to get and set the sc26198 global registers.
3551 static int stl_sc26198getglobreg(struct stlport *portp, int regnr)
3553 outb(regnr, (portp->ioaddr + XP_ADDR));
3554 return inb(portp->ioaddr + XP_DATA);
3558 static void stl_sc26198setglobreg(struct stlport *portp, int regnr, int value)
3560 outb(regnr, (portp->ioaddr + XP_ADDR));
3561 outb(value, (portp->ioaddr + XP_DATA));
3565 /*****************************************************************************/
3568 * Inbitialize the UARTs in a panel. We don't care what sort of board
3569 * these ports are on - since the port io registers are almost
3570 * identical when dealing with ports.
3573 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
3576 int nrchips, ioaddr;
3578 pr_debug("stl_sc26198panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
3580 BRDENABLE(panelp->brdnr, panelp->pagenr);
3583 * Check that each chip is present and started up OK.
3586 nrchips = (panelp->nrports + 4) / SC26198_PORTS;
3587 if (brdp->brdtype == BRD_ECHPCI)
3588 outb(panelp->pagenr, brdp->ioctrl);
3590 for (i = 0; i < nrchips; i++) {
3591 ioaddr = panelp->iobase + (i * 4);
3592 outb(SCCR, (ioaddr + XP_ADDR));
3593 outb(CR_RESETALL, (ioaddr + XP_DATA));
3594 outb(TSTR, (ioaddr + XP_ADDR));
3595 if (inb(ioaddr + XP_DATA) != 0) {
3596 printk("STALLION: sc26198 not responding, "
3597 "brd=%d panel=%d chip=%d\n",
3598 panelp->brdnr, panelp->panelnr, i);
3601 chipmask |= (0x1 << i);
3602 outb(GCCR, (ioaddr + XP_ADDR));
3603 outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA));
3604 outb(WDTRCR, (ioaddr + XP_ADDR));
3605 outb(0xff, (ioaddr + XP_DATA));
3608 BRDDISABLE(panelp->brdnr);
3612 /*****************************************************************************/
3615 * Initialize hardware specific port registers.
3618 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
3620 pr_debug("stl_sc26198portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
3623 if ((brdp == NULL) || (panelp == NULL) ||
3627 portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4);
3628 portp->uartaddr = (portp->portnr & 0x07) << 4;
3629 portp->pagenr = panelp->pagenr;
3632 BRDENABLE(portp->brdnr, portp->pagenr);
3633 stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS);
3634 BRDDISABLE(portp->brdnr);
3637 /*****************************************************************************/
3640 * Set up the sc26198 registers for a port based on the termios port
3644 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp)
3646 struct stlbrd *brdp;
3647 unsigned long flags;
3648 unsigned int baudrate;
3649 unsigned char mr0, mr1, mr2, clk;
3650 unsigned char imron, imroff, iopr, ipr;
3660 brdp = stl_brds[portp->brdnr];
3665 * Set up the RX char ignore mask with those RX error types we
3668 portp->rxignoremsk = 0;
3669 if (tiosp->c_iflag & IGNPAR)
3670 portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING |
3672 if (tiosp->c_iflag & IGNBRK)
3673 portp->rxignoremsk |= SR_RXBREAK;
3675 portp->rxmarkmsk = SR_RXOVERRUN;
3676 if (tiosp->c_iflag & (INPCK | PARMRK))
3677 portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING);
3678 if (tiosp->c_iflag & BRKINT)
3679 portp->rxmarkmsk |= SR_RXBREAK;
3682 * Go through the char size, parity and stop bits and set all the
3683 * option register appropriately.
3685 switch (tiosp->c_cflag & CSIZE) {
3700 if (tiosp->c_cflag & CSTOPB)
3705 if (tiosp->c_cflag & PARENB) {
3706 if (tiosp->c_cflag & PARODD)
3707 mr1 |= (MR1_PARENB | MR1_PARODD);
3709 mr1 |= (MR1_PARENB | MR1_PAREVEN);
3713 mr1 |= MR1_ERRBLOCK;
3716 * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing
3717 * space for hardware flow control and the like. This should be set to
3720 mr2 |= MR2_RXFIFOHALF;
3723 * Calculate the baud rate timers. For now we will just assume that
3724 * the input and output baud are the same. The sc26198 has a fixed
3725 * baud rate table, so only discrete baud rates possible.
3727 baudrate = tiosp->c_cflag & CBAUD;
3728 if (baudrate & CBAUDEX) {
3729 baudrate &= ~CBAUDEX;
3730 if ((baudrate < 1) || (baudrate > 4))
3731 tiosp->c_cflag &= ~CBAUDEX;
3735 baudrate = stl_baudrates[baudrate];
3736 if ((tiosp->c_cflag & CBAUD) == B38400) {
3737 if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3739 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3741 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3743 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3745 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
3746 baudrate = (portp->baud_base / portp->custom_divisor);
3748 if (baudrate > STL_SC26198MAXBAUD)
3749 baudrate = STL_SC26198MAXBAUD;
3752 for (clk = 0; clk < SC26198_NRBAUDS; clk++)
3753 if (baudrate <= sc26198_baudtable[clk])
3757 * Check what form of modem signaling is required and set it up.
3759 if (tiosp->c_cflag & CLOCAL) {
3760 portp->port.flags &= ~ASYNC_CHECK_CD;
3762 iopr |= IOPR_DCDCOS;
3764 portp->port.flags |= ASYNC_CHECK_CD;
3768 * Setup sc26198 enhanced modes if we can. In particular we want to
3769 * handle as much of the flow control as possible automatically. As
3770 * well as saving a few CPU cycles it will also greatly improve flow
3771 * control reliability.
3773 if (tiosp->c_iflag & IXON) {
3774 mr0 |= MR0_SWFTX | MR0_SWFT;
3775 imron |= IR_XONXOFF;
3777 imroff |= IR_XONXOFF;
3779 if (tiosp->c_iflag & IXOFF)
3782 if (tiosp->c_cflag & CRTSCTS) {
3788 * All sc26198 register values calculated so go through and set
3792 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3793 portp->portnr, portp->panelnr, portp->brdnr);
3794 pr_debug(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk);
3795 pr_debug(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff);
3796 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3797 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
3798 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
3800 spin_lock_irqsave(&brd_lock, flags);
3801 BRDENABLE(portp->brdnr, portp->pagenr);
3802 stl_sc26198setreg(portp, IMR, 0);
3803 stl_sc26198updatereg(portp, MR0, mr0);
3804 stl_sc26198updatereg(portp, MR1, mr1);
3805 stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK);
3806 stl_sc26198updatereg(portp, MR2, mr2);
3807 stl_sc26198updatereg(portp, IOPIOR,
3808 ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr));
3811 stl_sc26198setreg(portp, TXCSR, clk);
3812 stl_sc26198setreg(portp, RXCSR, clk);
3815 stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]);
3816 stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]);
3818 ipr = stl_sc26198getreg(portp, IPR);
3820 portp->sigs &= ~TIOCM_CD;
3822 portp->sigs |= TIOCM_CD;
3824 portp->imr = (portp->imr & ~imroff) | imron;
3825 stl_sc26198setreg(portp, IMR, portp->imr);
3826 BRDDISABLE(portp->brdnr);
3827 spin_unlock_irqrestore(&brd_lock, flags);
3830 /*****************************************************************************/
3833 * Set the state of the DTR and RTS signals.
3836 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts)
3838 unsigned char iopioron, iopioroff;
3839 unsigned long flags;
3841 pr_debug("stl_sc26198setsignals(portp=%p,dtr=%d,rts=%d)\n", portp,
3847 iopioroff |= IPR_DTR;
3849 iopioron |= IPR_DTR;
3851 iopioroff |= IPR_RTS;
3853 iopioron |= IPR_RTS;
3855 spin_lock_irqsave(&brd_lock, flags);
3856 BRDENABLE(portp->brdnr, portp->pagenr);
3857 stl_sc26198setreg(portp, IOPIOR,
3858 ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron));
3859 BRDDISABLE(portp->brdnr);
3860 spin_unlock_irqrestore(&brd_lock, flags);
3863 /*****************************************************************************/
3866 * Return the state of the signals.
3869 static int stl_sc26198getsignals(struct stlport *portp)
3872 unsigned long flags;
3875 pr_debug("stl_sc26198getsignals(portp=%p)\n", portp);
3877 spin_lock_irqsave(&brd_lock, flags);
3878 BRDENABLE(portp->brdnr, portp->pagenr);
3879 ipr = stl_sc26198getreg(portp, IPR);
3880 BRDDISABLE(portp->brdnr);
3881 spin_unlock_irqrestore(&brd_lock, flags);
3884 sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD;
3885 sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS;
3886 sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR;
3887 sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS;
3892 /*****************************************************************************/
3895 * Enable/Disable the Transmitter and/or Receiver.
3898 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx)
3901 unsigned long flags;
3903 pr_debug("stl_sc26198enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx,tx);
3905 ccr = portp->crenable;
3907 ccr &= ~CR_TXENABLE;
3911 ccr &= ~CR_RXENABLE;
3915 spin_lock_irqsave(&brd_lock, flags);
3916 BRDENABLE(portp->brdnr, portp->pagenr);
3917 stl_sc26198setreg(portp, SCCR, ccr);
3918 BRDDISABLE(portp->brdnr);
3919 portp->crenable = ccr;
3920 spin_unlock_irqrestore(&brd_lock, flags);
3923 /*****************************************************************************/
3926 * Start/stop the Transmitter and/or Receiver.
3929 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx)
3932 unsigned long flags;
3934 pr_debug("stl_sc26198startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3942 imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG);
3944 imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG;
3946 spin_lock_irqsave(&brd_lock, flags);
3947 BRDENABLE(portp->brdnr, portp->pagenr);
3948 stl_sc26198setreg(portp, IMR, imr);
3949 BRDDISABLE(portp->brdnr);
3952 set_bit(ASYI_TXBUSY, &portp->istate);
3953 spin_unlock_irqrestore(&brd_lock, flags);
3956 /*****************************************************************************/
3959 * Disable all interrupts from this port.
3962 static void stl_sc26198disableintrs(struct stlport *portp)
3964 unsigned long flags;
3966 pr_debug("stl_sc26198disableintrs(portp=%p)\n", portp);
3968 spin_lock_irqsave(&brd_lock, flags);
3969 BRDENABLE(portp->brdnr, portp->pagenr);
3971 stl_sc26198setreg(portp, IMR, 0);
3972 BRDDISABLE(portp->brdnr);
3973 spin_unlock_irqrestore(&brd_lock, flags);
3976 /*****************************************************************************/
3978 static void stl_sc26198sendbreak(struct stlport *portp, int len)
3980 unsigned long flags;
3982 pr_debug("stl_sc26198sendbreak(portp=%p,len=%d)\n", portp, len);
3984 spin_lock_irqsave(&brd_lock, flags);
3985 BRDENABLE(portp->brdnr, portp->pagenr);
3987 stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK);
3988 portp->stats.txbreaks++;
3990 stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK);
3992 BRDDISABLE(portp->brdnr);
3993 spin_unlock_irqrestore(&brd_lock, flags);
3996 /*****************************************************************************/
3999 * Take flow control actions...
4002 static void stl_sc26198flowctrl(struct stlport *portp, int state)
4004 struct tty_struct *tty;
4005 unsigned long flags;
4008 pr_debug("stl_sc26198flowctrl(portp=%p,state=%x)\n", portp, state);
4012 tty = tty_port_tty_get(&portp->port);
4016 spin_lock_irqsave(&brd_lock, flags);
4017 BRDENABLE(portp->brdnr, portp->pagenr);
4020 if (tty->termios->c_iflag & IXOFF) {
4021 mr0 = stl_sc26198getreg(portp, MR0);
4022 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4023 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4025 portp->stats.rxxon++;
4026 stl_sc26198wait(portp);
4027 stl_sc26198setreg(portp, MR0, mr0);
4030 * Question: should we return RTS to what it was before? It may
4031 * have been set by an ioctl... Suppose not, since if you have
4032 * hardware flow control set then it is pretty silly to go and
4033 * set the RTS line by hand.
4035 if (tty->termios->c_cflag & CRTSCTS) {
4036 stl_sc26198setreg(portp, MR1,
4037 (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS));
4038 stl_sc26198setreg(portp, IOPIOR,
4039 (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS));
4040 portp->stats.rxrtson++;
4043 if (tty->termios->c_iflag & IXOFF) {
4044 mr0 = stl_sc26198getreg(portp, MR0);
4045 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4046 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4048 portp->stats.rxxoff++;
4049 stl_sc26198wait(portp);
4050 stl_sc26198setreg(portp, MR0, mr0);
4052 if (tty->termios->c_cflag & CRTSCTS) {
4053 stl_sc26198setreg(portp, MR1,
4054 (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS));
4055 stl_sc26198setreg(portp, IOPIOR,
4056 (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS));
4057 portp->stats.rxrtsoff++;
4061 BRDDISABLE(portp->brdnr);
4062 spin_unlock_irqrestore(&brd_lock, flags);
4066 /*****************************************************************************/
4069 * Send a flow control character.
4072 static void stl_sc26198sendflow(struct stlport *portp, int state)
4074 struct tty_struct *tty;
4075 unsigned long flags;
4078 pr_debug("stl_sc26198sendflow(portp=%p,state=%x)\n", portp, state);
4082 tty = tty_port_tty_get(&portp->port);
4086 spin_lock_irqsave(&brd_lock, flags);
4087 BRDENABLE(portp->brdnr, portp->pagenr);
4089 mr0 = stl_sc26198getreg(portp, MR0);
4090 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4091 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4093 portp->stats.rxxon++;
4094 stl_sc26198wait(portp);
4095 stl_sc26198setreg(portp, MR0, mr0);
4097 mr0 = stl_sc26198getreg(portp, MR0);
4098 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4099 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4101 portp->stats.rxxoff++;
4102 stl_sc26198wait(portp);
4103 stl_sc26198setreg(portp, MR0, mr0);
4105 BRDDISABLE(portp->brdnr);
4106 spin_unlock_irqrestore(&brd_lock, flags);
4110 /*****************************************************************************/
4112 static void stl_sc26198flush(struct stlport *portp)
4114 unsigned long flags;
4116 pr_debug("stl_sc26198flush(portp=%p)\n", portp);
4121 spin_lock_irqsave(&brd_lock, flags);
4122 BRDENABLE(portp->brdnr, portp->pagenr);
4123 stl_sc26198setreg(portp, SCCR, CR_TXRESET);
4124 stl_sc26198setreg(portp, SCCR, portp->crenable);
4125 BRDDISABLE(portp->brdnr);
4126 portp->tx.tail = portp->tx.head;
4127 spin_unlock_irqrestore(&brd_lock, flags);
4130 /*****************************************************************************/
4133 * Return the current state of data flow on this port. This is only
4134 * really interesting when determining if data has fully completed
4135 * transmission or not... The sc26198 interrupt scheme cannot
4136 * determine when all data has actually drained, so we need to
4137 * check the port statusy register to be sure.
4140 static int stl_sc26198datastate(struct stlport *portp)
4142 unsigned long flags;
4145 pr_debug("stl_sc26198datastate(portp=%p)\n", portp);
4149 if (test_bit(ASYI_TXBUSY, &portp->istate))
4152 spin_lock_irqsave(&brd_lock, flags);
4153 BRDENABLE(portp->brdnr, portp->pagenr);
4154 sr = stl_sc26198getreg(portp, SR);
4155 BRDDISABLE(portp->brdnr);
4156 spin_unlock_irqrestore(&brd_lock, flags);
4158 return (sr & SR_TXEMPTY) ? 0 : 1;
4161 /*****************************************************************************/
4164 * Delay for a small amount of time, to give the sc26198 a chance
4165 * to process a command...
4168 static void stl_sc26198wait(struct stlport *portp)
4172 pr_debug("stl_sc26198wait(portp=%p)\n", portp);
4177 for (i = 0; i < 20; i++)
4178 stl_sc26198getglobreg(portp, TSTR);
4181 /*****************************************************************************/
4184 * If we are TX flow controlled and in IXANY mode then we may
4185 * need to unflow control here. We gotta do this because of the
4186 * automatic flow control modes of the sc26198.
4189 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty)
4193 mr0 = stl_sc26198getreg(portp, MR0);
4194 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4195 stl_sc26198setreg(portp, SCCR, CR_HOSTXON);
4196 stl_sc26198wait(portp);
4197 stl_sc26198setreg(portp, MR0, mr0);
4198 clear_bit(ASYI_TXFLOWED, &portp->istate);
4201 /*****************************************************************************/
4204 * Interrupt service routine for sc26198 panels.
4207 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase)
4209 struct stlport *portp;
4212 spin_lock(&brd_lock);
4215 * Work around bug in sc26198 chip... Cannot have A6 address
4216 * line of UART high, else iack will be returned as 0.
4218 outb(0, (iobase + 1));
4220 iack = inb(iobase + XP_IACK);
4221 portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)];
4223 if (iack & IVR_RXDATA)
4224 stl_sc26198rxisr(portp, iack);
4225 else if (iack & IVR_TXDATA)
4226 stl_sc26198txisr(portp);
4228 stl_sc26198otherisr(portp, iack);
4230 spin_unlock(&brd_lock);
4233 /*****************************************************************************/
4236 * Transmit interrupt handler. This has gotta be fast! Handling TX
4237 * chars is pretty simple, stuff as many as possible from the TX buffer
4238 * into the sc26198 FIFO.
4239 * In practice it is possible that interrupts are enabled but that the
4240 * port has been hung up. Need to handle not having any TX buffer here,
4241 * this is done by using the side effect that head and tail will also
4242 * be NULL if the buffer has been freed.
4245 static void stl_sc26198txisr(struct stlport *portp)
4247 struct tty_struct *tty;
4248 unsigned int ioaddr;
4253 pr_debug("stl_sc26198txisr(portp=%p)\n", portp);
4255 ioaddr = portp->ioaddr;
4256 head = portp->tx.head;
4257 tail = portp->tx.tail;
4258 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
4259 if ((len == 0) || ((len < STL_TXBUFLOW) &&
4260 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
4261 set_bit(ASYI_TXLOW, &portp->istate);
4262 tty = tty_port_tty_get(&portp->port);
4270 outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR));
4271 mr0 = inb(ioaddr + XP_DATA);
4272 if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) {
4273 portp->imr &= ~IR_TXRDY;
4274 outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR));
4275 outb(portp->imr, (ioaddr + XP_DATA));
4276 clear_bit(ASYI_TXBUSY, &portp->istate);
4278 mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY);
4279 outb(mr0, (ioaddr + XP_DATA));
4282 len = min(len, SC26198_TXFIFOSIZE);
4283 portp->stats.txtotal += len;
4284 stlen = min_t(unsigned int, len,
4285 (portp->tx.buf + STL_TXBUFSIZE) - tail);
4286 outb(GTXFIFO, (ioaddr + XP_ADDR));
4287 outsb((ioaddr + XP_DATA), tail, stlen);
4290 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
4291 tail = portp->tx.buf;
4293 outsb((ioaddr + XP_DATA), tail, len);
4296 portp->tx.tail = tail;
4300 /*****************************************************************************/
4303 * Receive character interrupt handler. Determine if we have good chars
4304 * or bad chars and then process appropriately. Good chars are easy
4305 * just shove the lot into the RX buffer and set all status byte to 0.
4306 * If a bad RX char then process as required. This routine needs to be
4307 * fast! In practice it is possible that we get an interrupt on a port
4308 * that is closed. This can happen on hangups - since they completely
4309 * shutdown a port not in user context. Need to handle this case.
4312 static void stl_sc26198rxisr(struct stlport *portp, unsigned int iack)
4314 struct tty_struct *tty;
4315 unsigned int len, buflen, ioaddr;
4317 pr_debug("stl_sc26198rxisr(portp=%p,iack=%x)\n", portp, iack);
4319 tty = tty_port_tty_get(&portp->port);
4320 ioaddr = portp->ioaddr;
4321 outb(GIBCR, (ioaddr + XP_ADDR));
4322 len = inb(ioaddr + XP_DATA) + 1;
4324 if ((iack & IVR_TYPEMASK) == IVR_RXDATA) {
4325 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
4326 len = min_t(unsigned int, len, sizeof(stl_unwanted));
4327 outb(GRXFIFO, (ioaddr + XP_ADDR));
4328 insb((ioaddr + XP_DATA), &stl_unwanted[0], len);
4329 portp->stats.rxlost += len;
4330 portp->stats.rxtotal += len;
4332 len = min(len, buflen);
4335 outb(GRXFIFO, (ioaddr + XP_ADDR));
4336 tty_prepare_flip_string(tty, &ptr, len);
4337 insb((ioaddr + XP_DATA), ptr, len);
4338 tty_schedule_flip(tty);
4339 portp->stats.rxtotal += len;
4343 stl_sc26198rxbadchars(portp);
4347 * If we are TX flow controlled and in IXANY mode then we may need
4348 * to unflow control here. We gotta do this because of the automatic
4349 * flow control modes of the sc26198.
4351 if (test_bit(ASYI_TXFLOWED, &portp->istate)) {
4352 if ((tty != NULL) &&
4353 (tty->termios != NULL) &&
4354 (tty->termios->c_iflag & IXANY)) {
4355 stl_sc26198txunflow(portp, tty);
4361 /*****************************************************************************/
4364 * Process an RX bad character.
4367 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch)
4369 struct tty_struct *tty;
4370 unsigned int ioaddr;
4372 tty = tty_port_tty_get(&portp->port);
4373 ioaddr = portp->ioaddr;
4375 if (status & SR_RXPARITY)
4376 portp->stats.rxparity++;
4377 if (status & SR_RXFRAMING)
4378 portp->stats.rxframing++;
4379 if (status & SR_RXOVERRUN)
4380 portp->stats.rxoverrun++;
4381 if (status & SR_RXBREAK)
4382 portp->stats.rxbreaks++;
4384 if ((tty != NULL) &&
4385 ((portp->rxignoremsk & status) == 0)) {
4386 if (portp->rxmarkmsk & status) {
4387 if (status & SR_RXBREAK) {
4389 if (portp->port.flags & ASYNC_SAK) {
4391 BRDENABLE(portp->brdnr, portp->pagenr);
4393 } else if (status & SR_RXPARITY)
4394 status = TTY_PARITY;
4395 else if (status & SR_RXFRAMING)
4397 else if(status & SR_RXOVERRUN)
4398 status = TTY_OVERRUN;
4404 tty_insert_flip_char(tty, ch, status);
4405 tty_schedule_flip(tty);
4408 portp->stats.rxtotal++;
4413 /*****************************************************************************/
4416 * Process all characters in the RX FIFO of the UART. Check all char
4417 * status bytes as well, and process as required. We need to check
4418 * all bytes in the FIFO, in case some more enter the FIFO while we
4419 * are here. To get the exact character error type we need to switch
4420 * into CHAR error mode (that is why we need to make sure we empty
4424 static void stl_sc26198rxbadchars(struct stlport *portp)
4426 unsigned char status, mr1;
4430 * To get the precise error type for each character we must switch
4431 * back into CHAR error mode.
4433 mr1 = stl_sc26198getreg(portp, MR1);
4434 stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK));
4436 while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) {
4437 stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR);
4438 ch = stl_sc26198getreg(portp, RXFIFO);
4439 stl_sc26198rxbadch(portp, status, ch);
4443 * To get correct interrupt class we must switch back into BLOCK
4446 stl_sc26198setreg(portp, MR1, mr1);
4449 /*****************************************************************************/
4452 * Other interrupt handler. This includes modem signals, flow
4453 * control actions, etc. Most stuff is left to off-level interrupt
4457 static void stl_sc26198otherisr(struct stlport *portp, unsigned int iack)
4459 unsigned char cir, ipr, xisr;
4461 pr_debug("stl_sc26198otherisr(portp=%p,iack=%x)\n", portp, iack);
4463 cir = stl_sc26198getglobreg(portp, CIR);
4465 switch (cir & CIR_SUBTYPEMASK) {
4467 ipr = stl_sc26198getreg(portp, IPR);
4468 if (ipr & IPR_DCDCHANGE) {
4469 stl_cd_change(portp);
4470 portp->stats.modem++;
4473 case CIR_SUBXONXOFF:
4474 xisr = stl_sc26198getreg(portp, XISR);
4475 if (xisr & XISR_RXXONGOT) {
4476 set_bit(ASYI_TXFLOWED, &portp->istate);
4477 portp->stats.txxoff++;
4479 if (xisr & XISR_RXXOFFGOT) {
4480 clear_bit(ASYI_TXFLOWED, &portp->istate);
4481 portp->stats.txxon++;
4485 stl_sc26198setreg(portp, SCCR, CR_BREAKRESET);
4486 stl_sc26198rxbadchars(portp);
4493 static void stl_free_isabrds(void)
4495 struct stlbrd *brdp;
4498 for (i = 0; i < stl_nrbrds; i++) {
4499 if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED))
4502 free_irq(brdp->irq, brdp);
4504 stl_cleanup_panels(brdp);
4506 release_region(brdp->ioaddr1, brdp->iosize1);
4507 if (brdp->iosize2 > 0)
4508 release_region(brdp->ioaddr2, brdp->iosize2);
4516 * Loadable module initialization stuff.
4518 static int __init stallion_module_init(void)
4520 struct stlbrd *brdp;
4521 struct stlconf conf;
4525 printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion);
4527 spin_lock_init(&stallion_lock);
4528 spin_lock_init(&brd_lock);
4530 stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS);
4536 stl_serial->owner = THIS_MODULE;
4537 stl_serial->driver_name = stl_drvname;
4538 stl_serial->name = "ttyE";
4539 stl_serial->major = STL_SERIALMAJOR;
4540 stl_serial->minor_start = 0;
4541 stl_serial->type = TTY_DRIVER_TYPE_SERIAL;
4542 stl_serial->subtype = SERIAL_TYPE_NORMAL;
4543 stl_serial->init_termios = stl_deftermios;
4544 stl_serial->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
4545 tty_set_operations(stl_serial, &stl_ops);
4547 retval = tty_register_driver(stl_serial);
4549 printk("STALLION: failed to register serial driver\n");
4554 * Find any dynamically supported boards. That is via module load
4557 for (i = stl_nrbrds; i < stl_nargs; i++) {
4558 memset(&conf, 0, sizeof(conf));
4559 if (stl_parsebrd(&conf, stl_brdsp[i]) == 0)
4561 if ((brdp = stl_allocbrd()) == NULL)
4564 brdp->brdtype = conf.brdtype;
4565 brdp->ioaddr1 = conf.ioaddr1;
4566 brdp->ioaddr2 = conf.ioaddr2;
4567 brdp->irq = conf.irq;
4568 brdp->irqtype = conf.irqtype;
4569 stl_brds[brdp->brdnr] = brdp;
4570 if (stl_brdinit(brdp)) {
4571 stl_brds[brdp->brdnr] = NULL;
4574 for (j = 0; j < brdp->nrports; j++)
4575 tty_register_device(stl_serial,
4576 brdp->brdnr * STL_MAXPORTS + j, NULL);
4581 /* this has to be _after_ isa finding because of locking */
4582 retval = pci_register_driver(&stl_pcidriver);
4583 if (retval && stl_nrbrds == 0) {
4584 printk(KERN_ERR "STALLION: can't register pci driver\n");
4589 * Set up a character driver for per board stuff. This is mainly used
4590 * to do stats ioctls on the ports.
4592 if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem))
4593 printk("STALLION: failed to register serial board device\n");
4595 stallion_class = class_create(THIS_MODULE, "staliomem");
4596 if (IS_ERR(stallion_class))
4597 printk("STALLION: failed to create class\n");
4598 for (i = 0; i < 4; i++)
4599 device_create(stallion_class, NULL, MKDEV(STL_SIOMEMMAJOR, i),
4600 NULL, "staliomem%d", i);
4604 tty_unregister_driver(stl_serial);
4606 put_tty_driver(stl_serial);
4611 static void __exit stallion_module_exit(void)
4613 struct stlbrd *brdp;
4616 pr_debug("cleanup_module()\n");
4618 printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle,
4622 * Free up all allocated resources used by the ports. This includes
4623 * memory and interrupts. As part of this process we will also do
4624 * a hangup on every open port - to try to flush out any processes
4625 * hanging onto ports.
4627 for (i = 0; i < stl_nrbrds; i++) {
4628 if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED))
4630 for (j = 0; j < brdp->nrports; j++)
4631 tty_unregister_device(stl_serial,
4632 brdp->brdnr * STL_MAXPORTS + j);
4635 for (i = 0; i < 4; i++)
4636 device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i));
4637 unregister_chrdev(STL_SIOMEMMAJOR, "staliomem");
4638 class_destroy(stallion_class);
4640 pci_unregister_driver(&stl_pcidriver);
4644 tty_unregister_driver(stl_serial);
4645 put_tty_driver(stl_serial);
4648 module_init(stallion_module_init);
4649 module_exit(stallion_module_exit);
4651 MODULE_AUTHOR("Greg Ungerer");
4652 MODULE_DESCRIPTION("Stallion Multiport Serial Driver");
4653 MODULE_LICENSE("GPL");