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/config.h>
30 #include <linux/module.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/cd1400.h>
37 #include <linux/sc26198.h>
38 #include <linux/comstats.h>
39 #include <linux/stallion.h>
40 #include <linux/ioport.h>
41 #include <linux/init.h>
42 #include <linux/smp_lock.h>
43 #include <linux/devfs_fs_kernel.h>
44 #include <linux/device.h>
45 #include <linux/delay.h>
48 #include <asm/uaccess.h>
51 #include <linux/pci.h>
54 /*****************************************************************************/
57 * Define different board types. Use the standard Stallion "assigned"
58 * board numbers. Boards supported in this driver are abbreviated as
59 * EIO = EasyIO and ECH = EasyConnection 8/32.
65 #define BRD_ECH64PCI 27
66 #define BRD_EASYIOPCI 28
69 * Define a configuration structure to hold the board configuration.
70 * Need to set this up in the code (for now) with the boards that are
71 * to be configured into the system. This is what needs to be modified
72 * when adding/removing/modifying boards. Each line entry in the
73 * stl_brdconf[] array is a board. Each line contains io/irq/memory
74 * ranges for that board (as well as what type of board it is).
76 * { BRD_EASYIO, 0x2a0, 0, 0, 10, 0 },
77 * This line would configure an EasyIO board (4 or 8, no difference),
78 * at io address 2a0 and irq 10.
80 * { BRD_ECH, 0x2a8, 0x280, 0, 12, 0 },
81 * This line will configure an EasyConnection 8/32 board at primary io
82 * address 2a8, secondary io address 280 and irq 12.
83 * Enter as many lines into this array as you want (only the first 4
84 * will actually be used!). Any combination of EasyIO and EasyConnection
85 * boards can be specified. EasyConnection 8/32 boards can share their
86 * secondary io addresses between each other.
88 * NOTE: there is no need to put any entries in this table for PCI
89 * boards. They will be found automatically by the driver - provided
90 * PCI BIOS32 support is compiled into the kernel.
97 unsigned long memaddr;
102 static stlconf_t stl_brdconf[] = {
103 /*{ BRD_EASYIO, 0x2a0, 0, 0, 10, 0 },*/
106 static int stl_nrbrds = ARRAY_SIZE(stl_brdconf);
108 /*****************************************************************************/
111 * Define some important driver characteristics. Device major numbers
112 * allocated as per Linux Device Registry.
114 #ifndef STL_SIOMEMMAJOR
115 #define STL_SIOMEMMAJOR 28
117 #ifndef STL_SERIALMAJOR
118 #define STL_SERIALMAJOR 24
120 #ifndef STL_CALLOUTMAJOR
121 #define STL_CALLOUTMAJOR 25
125 * Set the TX buffer size. Bigger is better, but we don't want
126 * to chew too much memory with buffers!
128 #define STL_TXBUFLOW 512
129 #define STL_TXBUFSIZE 4096
131 /*****************************************************************************/
134 * Define our local driver identity first. Set up stuff to deal with
135 * all the local structures required by a serial tty driver.
137 static char *stl_drvtitle = "Stallion Multiport Serial Driver";
138 static char *stl_drvname = "stallion";
139 static char *stl_drvversion = "5.6.0";
141 static struct tty_driver *stl_serial;
144 * We will need to allocate a temporary write buffer for chars that
145 * come direct from user space. The problem is that a copy from user
146 * space might cause a page fault (typically on a system that is
147 * swapping!). All ports will share one buffer - since if the system
148 * is already swapping a shared buffer won't make things any worse.
150 static char *stl_tmpwritebuf;
153 * Define a local default termios struct. All ports will be created
154 * with this termios initially. Basically all it defines is a raw port
155 * at 9600, 8 data bits, 1 stop bit.
157 static struct termios stl_deftermios = {
158 .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL),
163 * Define global stats structures. Not used often, and can be
164 * re-used for each stats call.
166 static comstats_t stl_comstats;
167 static combrd_t stl_brdstats;
168 static stlbrd_t stl_dummybrd;
169 static stlport_t stl_dummyport;
172 * Define global place to put buffer overflow characters.
174 static char stl_unwanted[SC26198_RXFIFOSIZE];
176 /*****************************************************************************/
178 static stlbrd_t *stl_brds[STL_MAXBRDS];
181 * Per board state flags. Used with the state field of the board struct.
182 * Not really much here!
184 #define BRD_FOUND 0x1
187 * Define the port structure istate flags. These set of flags are
188 * modified at interrupt time - so setting and reseting them needs
189 * to be atomic. Use the bit clear/setting routines for this.
191 #define ASYI_TXBUSY 1
193 #define ASYI_DCDCHANGE 3
194 #define ASYI_TXFLOWED 4
197 * Define an array of board names as printable strings. Handy for
198 * referencing boards when printing trace and stuff.
200 static char *stl_brdnames[] = {
232 /*****************************************************************************/
235 * Define some string labels for arguments passed from the module
236 * load line. These allow for easy board definitions, and easy
237 * modification of the io, memory and irq resoucres.
239 static int stl_nargs = 0;
240 static char *board0[4];
241 static char *board1[4];
242 static char *board2[4];
243 static char *board3[4];
245 static char **stl_brdsp[] = {
253 * Define a set of common board names, and types. This is used to
254 * parse any module arguments.
257 typedef struct stlbrdtype {
262 static stlbrdtype_t stl_brdstr[] = {
263 { "easyio", BRD_EASYIO },
264 { "eio", BRD_EASYIO },
265 { "20", BRD_EASYIO },
266 { "ec8/32", BRD_ECH },
267 { "ec8/32-at", BRD_ECH },
268 { "ec8/32-isa", BRD_ECH },
270 { "echat", BRD_ECH },
272 { "ec8/32-mc", BRD_ECHMC },
273 { "ec8/32-mca", BRD_ECHMC },
274 { "echmc", BRD_ECHMC },
275 { "echmca", BRD_ECHMC },
277 { "ec8/32-pc", BRD_ECHPCI },
278 { "ec8/32-pci", BRD_ECHPCI },
279 { "26", BRD_ECHPCI },
280 { "ec8/64-pc", BRD_ECH64PCI },
281 { "ec8/64-pci", BRD_ECH64PCI },
282 { "ech-pci", BRD_ECH64PCI },
283 { "echpci", BRD_ECH64PCI },
284 { "echpc", BRD_ECH64PCI },
285 { "27", BRD_ECH64PCI },
286 { "easyio-pc", BRD_EASYIOPCI },
287 { "easyio-pci", BRD_EASYIOPCI },
288 { "eio-pci", BRD_EASYIOPCI },
289 { "eiopci", BRD_EASYIOPCI },
290 { "28", BRD_EASYIOPCI },
294 * Define the module agruments.
296 MODULE_AUTHOR("Greg Ungerer");
297 MODULE_DESCRIPTION("Stallion Multiport Serial Driver");
298 MODULE_LICENSE("GPL");
300 module_param_array(board0, charp, &stl_nargs, 0);
301 MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]");
302 module_param_array(board1, charp, &stl_nargs, 0);
303 MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]");
304 module_param_array(board2, charp, &stl_nargs, 0);
305 MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]");
306 module_param_array(board3, charp, &stl_nargs, 0);
307 MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]");
309 /*****************************************************************************/
312 * Hardware ID bits for the EasyIO and ECH boards. These defines apply
313 * to the directly accessible io ports of these boards (not the uarts -
314 * they are in cd1400.h and sc26198.h).
316 #define EIO_8PORTRS 0x04
317 #define EIO_4PORTRS 0x05
318 #define EIO_8PORTDI 0x00
319 #define EIO_8PORTM 0x06
321 #define EIO_IDBITMASK 0x07
323 #define EIO_BRDMASK 0xf0
326 #define ID_BRD16 0x30
328 #define EIO_INTRPEND 0x08
329 #define EIO_INTEDGE 0x00
330 #define EIO_INTLEVEL 0x08
334 #define ECH_IDBITMASK 0xe0
335 #define ECH_BRDENABLE 0x08
336 #define ECH_BRDDISABLE 0x00
337 #define ECH_INTENABLE 0x01
338 #define ECH_INTDISABLE 0x00
339 #define ECH_INTLEVEL 0x02
340 #define ECH_INTEDGE 0x00
341 #define ECH_INTRPEND 0x01
342 #define ECH_BRDRESET 0x01
344 #define ECHMC_INTENABLE 0x01
345 #define ECHMC_BRDRESET 0x02
347 #define ECH_PNLSTATUS 2
348 #define ECH_PNL16PORT 0x20
349 #define ECH_PNLIDMASK 0x07
350 #define ECH_PNLXPID 0x40
351 #define ECH_PNLINTRPEND 0x80
353 #define ECH_ADDR2MASK 0x1e0
356 * Define the vector mapping bits for the programmable interrupt board
357 * hardware. These bits encode the interrupt for the board to use - it
358 * is software selectable (except the EIO-8M).
360 static unsigned char stl_vecmap[] = {
361 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07,
362 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03
366 * Set up enable and disable macros for the ECH boards. They require
367 * the secondary io address space to be activated and deactivated.
368 * This way all ECH boards can share their secondary io region.
369 * If this is an ECH-PCI board then also need to set the page pointer
370 * to point to the correct page.
372 #define BRDENABLE(brdnr,pagenr) \
373 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
374 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \
375 stl_brds[(brdnr)]->ioctrl); \
376 else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \
377 outb((pagenr), stl_brds[(brdnr)]->ioctrl);
379 #define BRDDISABLE(brdnr) \
380 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
381 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \
382 stl_brds[(brdnr)]->ioctrl);
384 #define STL_CD1400MAXBAUD 230400
385 #define STL_SC26198MAXBAUD 460800
387 #define STL_BAUDBASE 115200
388 #define STL_CLOSEDELAY (5 * HZ / 10)
390 /*****************************************************************************/
395 * Define the Stallion PCI vendor and device IDs.
397 #ifndef PCI_VENDOR_ID_STALLION
398 #define PCI_VENDOR_ID_STALLION 0x124d
400 #ifndef PCI_DEVICE_ID_ECHPCI832
401 #define PCI_DEVICE_ID_ECHPCI832 0x0000
403 #ifndef PCI_DEVICE_ID_ECHPCI864
404 #define PCI_DEVICE_ID_ECHPCI864 0x0002
406 #ifndef PCI_DEVICE_ID_EIOPCI
407 #define PCI_DEVICE_ID_EIOPCI 0x0003
411 * Define structure to hold all Stallion PCI boards.
413 typedef struct stlpcibrd {
414 unsigned short vendid;
415 unsigned short devid;
419 static stlpcibrd_t stl_pcibrds[] = {
420 { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864, BRD_ECH64PCI },
421 { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI, BRD_EASYIOPCI },
422 { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832, BRD_ECHPCI },
423 { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410, BRD_ECHPCI },
426 static int stl_nrpcibrds = ARRAY_SIZE(stl_pcibrds);
430 /*****************************************************************************/
433 * Define macros to extract a brd/port number from a minor number.
435 #define MINOR2BRD(min) (((min) & 0xc0) >> 6)
436 #define MINOR2PORT(min) ((min) & 0x3f)
439 * Define a baud rate table that converts termios baud rate selector
440 * into the actual baud rate value. All baud rate calculations are
441 * based on the actual baud rate required.
443 static unsigned int stl_baudrates[] = {
444 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
445 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
449 * Define some handy local macros...
452 #define MIN(a,b) (((a) <= (b)) ? (a) : (b))
455 #define TOLOWER(x) ((((x) >= 'A') && ((x) <= 'Z')) ? ((x) + 0x20) : (x))
457 /*****************************************************************************/
460 * Declare all those functions in this driver!
463 static void stl_argbrds(void);
464 static int stl_parsebrd(stlconf_t *confp, char **argp);
466 static unsigned long stl_atol(char *str);
468 static int stl_init(void);
469 static int stl_open(struct tty_struct *tty, struct file *filp);
470 static void stl_close(struct tty_struct *tty, struct file *filp);
471 static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count);
472 static void stl_putchar(struct tty_struct *tty, unsigned char ch);
473 static void stl_flushchars(struct tty_struct *tty);
474 static int stl_writeroom(struct tty_struct *tty);
475 static int stl_charsinbuffer(struct tty_struct *tty);
476 static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg);
477 static void stl_settermios(struct tty_struct *tty, struct termios *old);
478 static void stl_throttle(struct tty_struct *tty);
479 static void stl_unthrottle(struct tty_struct *tty);
480 static void stl_stop(struct tty_struct *tty);
481 static void stl_start(struct tty_struct *tty);
482 static void stl_flushbuffer(struct tty_struct *tty);
483 static void stl_breakctl(struct tty_struct *tty, int state);
484 static void stl_waituntilsent(struct tty_struct *tty, int timeout);
485 static void stl_sendxchar(struct tty_struct *tty, char ch);
486 static void stl_hangup(struct tty_struct *tty);
487 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg);
488 static int stl_portinfo(stlport_t *portp, int portnr, char *pos);
489 static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data);
491 static int stl_brdinit(stlbrd_t *brdp);
492 static int stl_initports(stlbrd_t *brdp, stlpanel_t *panelp);
493 static int stl_getserial(stlport_t *portp, struct serial_struct __user *sp);
494 static int stl_setserial(stlport_t *portp, struct serial_struct __user *sp);
495 static int stl_getbrdstats(combrd_t __user *bp);
496 static int stl_getportstats(stlport_t *portp, comstats_t __user *cp);
497 static int stl_clrportstats(stlport_t *portp, comstats_t __user *cp);
498 static int stl_getportstruct(stlport_t __user *arg);
499 static int stl_getbrdstruct(stlbrd_t __user *arg);
500 static int stl_waitcarrier(stlport_t *portp, struct file *filp);
501 static int stl_eiointr(stlbrd_t *brdp);
502 static int stl_echatintr(stlbrd_t *brdp);
503 static int stl_echmcaintr(stlbrd_t *brdp);
504 static int stl_echpciintr(stlbrd_t *brdp);
505 static int stl_echpci64intr(stlbrd_t *brdp);
506 static void stl_offintr(void *private);
507 static stlbrd_t *stl_allocbrd(void);
508 static stlport_t *stl_getport(int brdnr, int panelnr, int portnr);
510 static inline int stl_initbrds(void);
511 static inline int stl_initeio(stlbrd_t *brdp);
512 static inline int stl_initech(stlbrd_t *brdp);
513 static inline int stl_getbrdnr(void);
516 static inline int stl_findpcibrds(void);
517 static inline int stl_initpcibrd(int brdtype, struct pci_dev *devp);
521 * CD1400 uart specific handling functions.
523 static void stl_cd1400setreg(stlport_t *portp, int regnr, int value);
524 static int stl_cd1400getreg(stlport_t *portp, int regnr);
525 static int stl_cd1400updatereg(stlport_t *portp, int regnr, int value);
526 static int stl_cd1400panelinit(stlbrd_t *brdp, stlpanel_t *panelp);
527 static void stl_cd1400portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp);
528 static void stl_cd1400setport(stlport_t *portp, struct termios *tiosp);
529 static int stl_cd1400getsignals(stlport_t *portp);
530 static void stl_cd1400setsignals(stlport_t *portp, int dtr, int rts);
531 static void stl_cd1400ccrwait(stlport_t *portp);
532 static void stl_cd1400enablerxtx(stlport_t *portp, int rx, int tx);
533 static void stl_cd1400startrxtx(stlport_t *portp, int rx, int tx);
534 static void stl_cd1400disableintrs(stlport_t *portp);
535 static void stl_cd1400sendbreak(stlport_t *portp, int len);
536 static void stl_cd1400flowctrl(stlport_t *portp, int state);
537 static void stl_cd1400sendflow(stlport_t *portp, int state);
538 static void stl_cd1400flush(stlport_t *portp);
539 static int stl_cd1400datastate(stlport_t *portp);
540 static void stl_cd1400eiointr(stlpanel_t *panelp, unsigned int iobase);
541 static void stl_cd1400echintr(stlpanel_t *panelp, unsigned int iobase);
542 static void stl_cd1400txisr(stlpanel_t *panelp, int ioaddr);
543 static void stl_cd1400rxisr(stlpanel_t *panelp, int ioaddr);
544 static void stl_cd1400mdmisr(stlpanel_t *panelp, int ioaddr);
546 static inline int stl_cd1400breakisr(stlport_t *portp, int ioaddr);
549 * SC26198 uart specific handling functions.
551 static void stl_sc26198setreg(stlport_t *portp, int regnr, int value);
552 static int stl_sc26198getreg(stlport_t *portp, int regnr);
553 static int stl_sc26198updatereg(stlport_t *portp, int regnr, int value);
554 static int stl_sc26198getglobreg(stlport_t *portp, int regnr);
555 static int stl_sc26198panelinit(stlbrd_t *brdp, stlpanel_t *panelp);
556 static void stl_sc26198portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp);
557 static void stl_sc26198setport(stlport_t *portp, struct termios *tiosp);
558 static int stl_sc26198getsignals(stlport_t *portp);
559 static void stl_sc26198setsignals(stlport_t *portp, int dtr, int rts);
560 static void stl_sc26198enablerxtx(stlport_t *portp, int rx, int tx);
561 static void stl_sc26198startrxtx(stlport_t *portp, int rx, int tx);
562 static void stl_sc26198disableintrs(stlport_t *portp);
563 static void stl_sc26198sendbreak(stlport_t *portp, int len);
564 static void stl_sc26198flowctrl(stlport_t *portp, int state);
565 static void stl_sc26198sendflow(stlport_t *portp, int state);
566 static void stl_sc26198flush(stlport_t *portp);
567 static int stl_sc26198datastate(stlport_t *portp);
568 static void stl_sc26198wait(stlport_t *portp);
569 static void stl_sc26198txunflow(stlport_t *portp, struct tty_struct *tty);
570 static void stl_sc26198intr(stlpanel_t *panelp, unsigned int iobase);
571 static void stl_sc26198txisr(stlport_t *port);
572 static void stl_sc26198rxisr(stlport_t *port, unsigned int iack);
573 static void stl_sc26198rxbadch(stlport_t *portp, unsigned char status, char ch);
574 static void stl_sc26198rxbadchars(stlport_t *portp);
575 static void stl_sc26198otherisr(stlport_t *port, unsigned int iack);
577 /*****************************************************************************/
580 * Generic UART support structure.
582 typedef struct uart {
583 int (*panelinit)(stlbrd_t *brdp, stlpanel_t *panelp);
584 void (*portinit)(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp);
585 void (*setport)(stlport_t *portp, struct termios *tiosp);
586 int (*getsignals)(stlport_t *portp);
587 void (*setsignals)(stlport_t *portp, int dtr, int rts);
588 void (*enablerxtx)(stlport_t *portp, int rx, int tx);
589 void (*startrxtx)(stlport_t *portp, int rx, int tx);
590 void (*disableintrs)(stlport_t *portp);
591 void (*sendbreak)(stlport_t *portp, int len);
592 void (*flowctrl)(stlport_t *portp, int state);
593 void (*sendflow)(stlport_t *portp, int state);
594 void (*flush)(stlport_t *portp);
595 int (*datastate)(stlport_t *portp);
596 void (*intr)(stlpanel_t *panelp, unsigned int iobase);
600 * Define some macros to make calling these functions nice and clean.
602 #define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit)
603 #define stl_portinit (* ((uart_t *) portp->uartp)->portinit)
604 #define stl_setport (* ((uart_t *) portp->uartp)->setport)
605 #define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals)
606 #define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals)
607 #define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx)
608 #define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx)
609 #define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs)
610 #define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak)
611 #define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl)
612 #define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow)
613 #define stl_flush (* ((uart_t *) portp->uartp)->flush)
614 #define stl_datastate (* ((uart_t *) portp->uartp)->datastate)
616 /*****************************************************************************/
619 * CD1400 UART specific data initialization.
621 static uart_t stl_cd1400uart = {
625 stl_cd1400getsignals,
626 stl_cd1400setsignals,
627 stl_cd1400enablerxtx,
629 stl_cd1400disableintrs,
639 * Define the offsets within the register bank of a cd1400 based panel.
640 * These io address offsets are common to the EasyIO board as well.
648 #define EREG_BANKSIZE 8
650 #define CD1400_CLK 25000000
651 #define CD1400_CLK8M 20000000
654 * Define the cd1400 baud rate clocks. These are used when calculating
655 * what clock and divisor to use for the required baud rate. Also
656 * define the maximum baud rate allowed, and the default base baud.
658 static int stl_cd1400clkdivs[] = {
659 CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4
662 /*****************************************************************************/
665 * SC26198 UART specific data initization.
667 static uart_t stl_sc26198uart = {
668 stl_sc26198panelinit,
671 stl_sc26198getsignals,
672 stl_sc26198setsignals,
673 stl_sc26198enablerxtx,
674 stl_sc26198startrxtx,
675 stl_sc26198disableintrs,
676 stl_sc26198sendbreak,
680 stl_sc26198datastate,
685 * Define the offsets within the register bank of a sc26198 based panel.
693 #define XP_BANKSIZE 4
696 * Define the sc26198 baud rate table. Offsets within the table
697 * represent the actual baud rate selector of sc26198 registers.
699 static unsigned int sc26198_baudtable[] = {
700 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600,
701 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200,
702 230400, 460800, 921600
705 #define SC26198_NRBAUDS ARRAY_SIZE(sc26198_baudtable)
707 /*****************************************************************************/
710 * Define the driver info for a user level control device. Used mainly
711 * to get at port stats - only not using the port device itself.
713 static struct file_operations stl_fsiomem = {
714 .owner = THIS_MODULE,
715 .ioctl = stl_memioctl,
718 /*****************************************************************************/
720 static struct class *stallion_class;
723 * Loadable module initialization stuff.
726 static int __init stallion_module_init(void)
731 printk("init_module()\n");
737 restore_flags(flags);
742 /*****************************************************************************/
744 static void __exit stallion_module_exit(void)
753 printk("cleanup_module()\n");
756 printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle,
763 * Free up all allocated resources used by the ports. This includes
764 * memory and interrupts. As part of this process we will also do
765 * a hangup on every open port - to try to flush out any processes
766 * hanging onto ports.
768 i = tty_unregister_driver(stl_serial);
769 put_tty_driver(stl_serial);
771 printk("STALLION: failed to un-register tty driver, "
773 restore_flags(flags);
776 for (i = 0; i < 4; i++)
777 class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i));
778 if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem")))
779 printk("STALLION: failed to un-register serial memory device, "
781 class_destroy(stallion_class);
783 kfree(stl_tmpwritebuf);
785 for (i = 0; (i < stl_nrbrds); i++) {
786 if ((brdp = stl_brds[i]) == (stlbrd_t *) NULL)
789 free_irq(brdp->irq, brdp);
791 for (j = 0; (j < STL_MAXPANELS); j++) {
792 panelp = brdp->panels[j];
793 if (panelp == (stlpanel_t *) NULL)
795 for (k = 0; (k < STL_PORTSPERPANEL); k++) {
796 portp = panelp->ports[k];
797 if (portp == (stlport_t *) NULL)
799 if (portp->tty != (struct tty_struct *) NULL)
800 stl_hangup(portp->tty);
801 kfree(portp->tx.buf);
807 release_region(brdp->ioaddr1, brdp->iosize1);
808 if (brdp->iosize2 > 0)
809 release_region(brdp->ioaddr2, brdp->iosize2);
812 stl_brds[i] = (stlbrd_t *) NULL;
815 restore_flags(flags);
818 module_init(stallion_module_init);
819 module_exit(stallion_module_exit);
821 /*****************************************************************************/
824 * Check for any arguments passed in on the module load command line.
827 static void stl_argbrds(void)
834 printk("stl_argbrds()\n");
837 for (i = stl_nrbrds; (i < stl_nargs); i++) {
838 memset(&conf, 0, sizeof(conf));
839 if (stl_parsebrd(&conf, stl_brdsp[i]) == 0)
841 if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL)
845 brdp->brdtype = conf.brdtype;
846 brdp->ioaddr1 = conf.ioaddr1;
847 brdp->ioaddr2 = conf.ioaddr2;
848 brdp->irq = conf.irq;
849 brdp->irqtype = conf.irqtype;
854 /*****************************************************************************/
857 * Convert an ascii string number into an unsigned long.
860 static unsigned long stl_atol(char *str)
868 if ((*sp == '0') && (*(sp+1) == 'x')) {
871 } else if (*sp == '0') {
878 for (; (*sp != 0); sp++) {
879 c = (*sp > '9') ? (TOLOWER(*sp) - 'a' + 10) : (*sp - '0');
880 if ((c < 0) || (c >= base)) {
881 printk("STALLION: invalid argument %s\n", str);
885 val = (val * base) + c;
890 /*****************************************************************************/
893 * Parse the supplied argument string, into the board conf struct.
896 static int stl_parsebrd(stlconf_t *confp, char **argp)
902 printk("stl_parsebrd(confp=%x,argp=%x)\n", (int) confp, (int) argp);
905 if ((argp[0] == (char *) NULL) || (*argp[0] == 0))
908 for (sp = argp[0], i = 0; ((*sp != 0) && (i < 25)); sp++, i++)
911 for (i = 0; i < ARRAY_SIZE(stl_brdstr); i++) {
912 if (strcmp(stl_brdstr[i].name, argp[0]) == 0)
915 if (i == ARRAY_SIZE(stl_brdstr)) {
916 printk("STALLION: unknown board name, %s?\n", argp[0]);
920 confp->brdtype = stl_brdstr[i].type;
923 if ((argp[i] != (char *) NULL) && (*argp[i] != 0))
924 confp->ioaddr1 = stl_atol(argp[i]);
926 if (confp->brdtype == BRD_ECH) {
927 if ((argp[i] != (char *) NULL) && (*argp[i] != 0))
928 confp->ioaddr2 = stl_atol(argp[i]);
931 if ((argp[i] != (char *) NULL) && (*argp[i] != 0))
932 confp->irq = stl_atol(argp[i]);
936 /*****************************************************************************/
939 * Allocate a new board structure. Fill out the basic info in it.
942 static stlbrd_t *stl_allocbrd(void)
946 brdp = kzalloc(sizeof(stlbrd_t), GFP_KERNEL);
948 printk("STALLION: failed to allocate memory (size=%d)\n",
953 brdp->magic = STL_BOARDMAGIC;
957 /*****************************************************************************/
959 static int stl_open(struct tty_struct *tty, struct file *filp)
963 unsigned int minordev;
964 int brdnr, panelnr, portnr, rc;
967 printk("stl_open(tty=%x,filp=%x): device=%s\n", (int) tty,
968 (int) filp, tty->name);
971 minordev = tty->index;
972 brdnr = MINOR2BRD(minordev);
973 if (brdnr >= stl_nrbrds)
975 brdp = stl_brds[brdnr];
976 if (brdp == (stlbrd_t *) NULL)
978 minordev = MINOR2PORT(minordev);
979 for (portnr = -1, panelnr = 0; (panelnr < STL_MAXPANELS); panelnr++) {
980 if (brdp->panels[panelnr] == (stlpanel_t *) NULL)
982 if (minordev < brdp->panels[panelnr]->nrports) {
986 minordev -= brdp->panels[panelnr]->nrports;
991 portp = brdp->panels[panelnr]->ports[portnr];
992 if (portp == (stlport_t *) NULL)
996 * On the first open of the device setup the port hardware, and
997 * initialize the per port data structure.
1000 tty->driver_data = portp;
1003 if ((portp->flags & ASYNC_INITIALIZED) == 0) {
1004 if (!portp->tx.buf) {
1005 portp->tx.buf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL);
1008 portp->tx.head = portp->tx.buf;
1009 portp->tx.tail = portp->tx.buf;
1011 stl_setport(portp, tty->termios);
1012 portp->sigs = stl_getsignals(portp);
1013 stl_setsignals(portp, 1, 1);
1014 stl_enablerxtx(portp, 1, 1);
1015 stl_startrxtx(portp, 1, 0);
1016 clear_bit(TTY_IO_ERROR, &tty->flags);
1017 portp->flags |= ASYNC_INITIALIZED;
1021 * Check if this port is in the middle of closing. If so then wait
1022 * until it is closed then return error status, based on flag settings.
1023 * The sleep here does not need interrupt protection since the wakeup
1024 * for it is done with the same context.
1026 if (portp->flags & ASYNC_CLOSING) {
1027 interruptible_sleep_on(&portp->close_wait);
1028 if (portp->flags & ASYNC_HUP_NOTIFY)
1030 return -ERESTARTSYS;
1034 * Based on type of open being done check if it can overlap with any
1035 * previous opens still in effect. If we are a normal serial device
1036 * then also we might have to wait for carrier.
1038 if (!(filp->f_flags & O_NONBLOCK)) {
1039 if ((rc = stl_waitcarrier(portp, filp)) != 0)
1042 portp->flags |= ASYNC_NORMAL_ACTIVE;
1047 /*****************************************************************************/
1050 * Possibly need to wait for carrier (DCD signal) to come high. Say
1051 * maybe because if we are clocal then we don't need to wait...
1054 static int stl_waitcarrier(stlport_t *portp, struct file *filp)
1056 unsigned long flags;
1060 printk("stl_waitcarrier(portp=%x,filp=%x)\n", (int) portp, (int) filp);
1066 if (portp->tty->termios->c_cflag & CLOCAL)
1071 portp->openwaitcnt++;
1072 if (! tty_hung_up_p(filp))
1076 stl_setsignals(portp, 1, 1);
1077 if (tty_hung_up_p(filp) ||
1078 ((portp->flags & ASYNC_INITIALIZED) == 0)) {
1079 if (portp->flags & ASYNC_HUP_NOTIFY)
1085 if (((portp->flags & ASYNC_CLOSING) == 0) &&
1086 (doclocal || (portp->sigs & TIOCM_CD))) {
1089 if (signal_pending(current)) {
1093 interruptible_sleep_on(&portp->open_wait);
1096 if (! tty_hung_up_p(filp))
1098 portp->openwaitcnt--;
1099 restore_flags(flags);
1104 /*****************************************************************************/
1106 static void stl_close(struct tty_struct *tty, struct file *filp)
1109 unsigned long flags;
1112 printk("stl_close(tty=%x,filp=%x)\n", (int) tty, (int) filp);
1115 portp = tty->driver_data;
1116 if (portp == (stlport_t *) NULL)
1121 if (tty_hung_up_p(filp)) {
1122 restore_flags(flags);
1125 if ((tty->count == 1) && (portp->refcount != 1))
1126 portp->refcount = 1;
1127 if (portp->refcount-- > 1) {
1128 restore_flags(flags);
1132 portp->refcount = 0;
1133 portp->flags |= ASYNC_CLOSING;
1136 * May want to wait for any data to drain before closing. The BUSY
1137 * flag keeps track of whether we are still sending or not - it is
1138 * very accurate for the cd1400, not quite so for the sc26198.
1139 * (The sc26198 has no "end-of-data" interrupt only empty FIFO)
1142 if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1143 tty_wait_until_sent(tty, portp->closing_wait);
1144 stl_waituntilsent(tty, (HZ / 2));
1146 portp->flags &= ~ASYNC_INITIALIZED;
1147 stl_disableintrs(portp);
1148 if (tty->termios->c_cflag & HUPCL)
1149 stl_setsignals(portp, 0, 0);
1150 stl_enablerxtx(portp, 0, 0);
1151 stl_flushbuffer(tty);
1153 if (portp->tx.buf != (char *) NULL) {
1154 kfree(portp->tx.buf);
1155 portp->tx.buf = (char *) NULL;
1156 portp->tx.head = (char *) NULL;
1157 portp->tx.tail = (char *) NULL;
1159 set_bit(TTY_IO_ERROR, &tty->flags);
1160 tty_ldisc_flush(tty);
1163 portp->tty = (struct tty_struct *) NULL;
1165 if (portp->openwaitcnt) {
1166 if (portp->close_delay)
1167 msleep_interruptible(jiffies_to_msecs(portp->close_delay));
1168 wake_up_interruptible(&portp->open_wait);
1171 portp->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
1172 wake_up_interruptible(&portp->close_wait);
1173 restore_flags(flags);
1176 /*****************************************************************************/
1179 * Write routine. Take data and stuff it in to the TX ring queue.
1180 * If transmit interrupts are not running then start them.
1183 static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count)
1186 unsigned int len, stlen;
1187 unsigned char *chbuf;
1191 printk("stl_write(tty=%x,buf=%x,count=%d)\n",
1192 (int) tty, (int) buf, count);
1195 if ((tty == (struct tty_struct *) NULL) ||
1196 (stl_tmpwritebuf == (char *) NULL))
1198 portp = tty->driver_data;
1199 if (portp == (stlport_t *) NULL)
1201 if (portp->tx.buf == (char *) NULL)
1205 * If copying direct from user space we must cater for page faults,
1206 * causing us to "sleep" here for a while. To handle this copy in all
1207 * the data we need now, into a local buffer. Then when we got it all
1208 * copy it into the TX buffer.
1210 chbuf = (unsigned char *) buf;
1212 head = portp->tx.head;
1213 tail = portp->tx.tail;
1215 len = STL_TXBUFSIZE - (head - tail) - 1;
1216 stlen = STL_TXBUFSIZE - (head - portp->tx.buf);
1218 len = tail - head - 1;
1222 len = MIN(len, count);
1225 stlen = MIN(len, stlen);
1226 memcpy(head, chbuf, stlen);
1231 if (head >= (portp->tx.buf + STL_TXBUFSIZE)) {
1232 head = portp->tx.buf;
1233 stlen = tail - head;
1236 portp->tx.head = head;
1238 clear_bit(ASYI_TXLOW, &portp->istate);
1239 stl_startrxtx(portp, -1, 1);
1244 /*****************************************************************************/
1246 static void stl_putchar(struct tty_struct *tty, unsigned char ch)
1253 printk("stl_putchar(tty=%x,ch=%x)\n", (int) tty, (int) ch);
1256 if (tty == (struct tty_struct *) NULL)
1258 portp = tty->driver_data;
1259 if (portp == (stlport_t *) NULL)
1261 if (portp->tx.buf == (char *) NULL)
1264 head = portp->tx.head;
1265 tail = portp->tx.tail;
1267 len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head);
1272 if (head >= (portp->tx.buf + STL_TXBUFSIZE))
1273 head = portp->tx.buf;
1275 portp->tx.head = head;
1278 /*****************************************************************************/
1281 * If there are any characters in the buffer then make sure that TX
1282 * interrupts are on and get'em out. Normally used after the putchar
1283 * routine has been called.
1286 static void stl_flushchars(struct tty_struct *tty)
1291 printk("stl_flushchars(tty=%x)\n", (int) tty);
1294 if (tty == (struct tty_struct *) NULL)
1296 portp = tty->driver_data;
1297 if (portp == (stlport_t *) NULL)
1299 if (portp->tx.buf == (char *) NULL)
1303 if (tty->stopped || tty->hw_stopped ||
1304 (portp->tx.head == portp->tx.tail))
1307 stl_startrxtx(portp, -1, 1);
1310 /*****************************************************************************/
1312 static int stl_writeroom(struct tty_struct *tty)
1318 printk("stl_writeroom(tty=%x)\n", (int) tty);
1321 if (tty == (struct tty_struct *) NULL)
1323 portp = tty->driver_data;
1324 if (portp == (stlport_t *) NULL)
1326 if (portp->tx.buf == (char *) NULL)
1329 head = portp->tx.head;
1330 tail = portp->tx.tail;
1331 return ((head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1));
1334 /*****************************************************************************/
1337 * Return number of chars in the TX buffer. Normally we would just
1338 * calculate the number of chars in the buffer and return that, but if
1339 * the buffer is empty and TX interrupts are still on then we return
1340 * that the buffer still has 1 char in it. This way whoever called us
1341 * will not think that ALL chars have drained - since the UART still
1342 * must have some chars in it (we are busy after all).
1345 static int stl_charsinbuffer(struct tty_struct *tty)
1352 printk("stl_charsinbuffer(tty=%x)\n", (int) tty);
1355 if (tty == (struct tty_struct *) NULL)
1357 portp = tty->driver_data;
1358 if (portp == (stlport_t *) NULL)
1360 if (portp->tx.buf == (char *) NULL)
1363 head = portp->tx.head;
1364 tail = portp->tx.tail;
1365 size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
1366 if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate))
1371 /*****************************************************************************/
1374 * Generate the serial struct info.
1377 static int stl_getserial(stlport_t *portp, struct serial_struct __user *sp)
1379 struct serial_struct sio;
1383 printk("stl_getserial(portp=%x,sp=%x)\n", (int) portp, (int) sp);
1386 memset(&sio, 0, sizeof(struct serial_struct));
1387 sio.line = portp->portnr;
1388 sio.port = portp->ioaddr;
1389 sio.flags = portp->flags;
1390 sio.baud_base = portp->baud_base;
1391 sio.close_delay = portp->close_delay;
1392 sio.closing_wait = portp->closing_wait;
1393 sio.custom_divisor = portp->custom_divisor;
1395 if (portp->uartp == &stl_cd1400uart) {
1396 sio.type = PORT_CIRRUS;
1397 sio.xmit_fifo_size = CD1400_TXFIFOSIZE;
1399 sio.type = PORT_UNKNOWN;
1400 sio.xmit_fifo_size = SC26198_TXFIFOSIZE;
1403 brdp = stl_brds[portp->brdnr];
1404 if (brdp != (stlbrd_t *) NULL)
1405 sio.irq = brdp->irq;
1407 return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0;
1410 /*****************************************************************************/
1413 * Set port according to the serial struct info.
1414 * At this point we do not do any auto-configure stuff, so we will
1415 * just quietly ignore any requests to change irq, etc.
1418 static int stl_setserial(stlport_t *portp, struct serial_struct __user *sp)
1420 struct serial_struct sio;
1423 printk("stl_setserial(portp=%x,sp=%x)\n", (int) portp, (int) sp);
1426 if (copy_from_user(&sio, sp, sizeof(struct serial_struct)))
1428 if (!capable(CAP_SYS_ADMIN)) {
1429 if ((sio.baud_base != portp->baud_base) ||
1430 (sio.close_delay != portp->close_delay) ||
1431 ((sio.flags & ~ASYNC_USR_MASK) !=
1432 (portp->flags & ~ASYNC_USR_MASK)))
1436 portp->flags = (portp->flags & ~ASYNC_USR_MASK) |
1437 (sio.flags & ASYNC_USR_MASK);
1438 portp->baud_base = sio.baud_base;
1439 portp->close_delay = sio.close_delay;
1440 portp->closing_wait = sio.closing_wait;
1441 portp->custom_divisor = sio.custom_divisor;
1442 stl_setport(portp, portp->tty->termios);
1446 /*****************************************************************************/
1448 static int stl_tiocmget(struct tty_struct *tty, struct file *file)
1452 if (tty == (struct tty_struct *) NULL)
1454 portp = tty->driver_data;
1455 if (portp == (stlport_t *) NULL)
1457 if (tty->flags & (1 << TTY_IO_ERROR))
1460 return stl_getsignals(portp);
1463 static int stl_tiocmset(struct tty_struct *tty, struct file *file,
1464 unsigned int set, unsigned int clear)
1467 int rts = -1, dtr = -1;
1469 if (tty == (struct tty_struct *) NULL)
1471 portp = tty->driver_data;
1472 if (portp == (stlport_t *) NULL)
1474 if (tty->flags & (1 << TTY_IO_ERROR))
1477 if (set & TIOCM_RTS)
1479 if (set & TIOCM_DTR)
1481 if (clear & TIOCM_RTS)
1483 if (clear & TIOCM_DTR)
1486 stl_setsignals(portp, dtr, rts);
1490 static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1495 void __user *argp = (void __user *)arg;
1498 printk("stl_ioctl(tty=%x,file=%x,cmd=%x,arg=%x)\n",
1499 (int) tty, (int) file, cmd, (int) arg);
1502 if (tty == (struct tty_struct *) NULL)
1504 portp = tty->driver_data;
1505 if (portp == (stlport_t *) NULL)
1508 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1509 (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) {
1510 if (tty->flags & (1 << TTY_IO_ERROR))
1518 rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0),
1519 (unsigned __user *) argp);
1522 if (get_user(ival, (unsigned int __user *) arg))
1524 tty->termios->c_cflag =
1525 (tty->termios->c_cflag & ~CLOCAL) |
1526 (ival ? CLOCAL : 0);
1529 rc = stl_getserial(portp, argp);
1532 rc = stl_setserial(portp, argp);
1534 case COM_GETPORTSTATS:
1535 rc = stl_getportstats(portp, argp);
1537 case COM_CLRPORTSTATS:
1538 rc = stl_clrportstats(portp, argp);
1544 case TIOCSERGSTRUCT:
1545 case TIOCSERGETMULTI:
1546 case TIOCSERSETMULTI:
1555 /*****************************************************************************/
1557 static void stl_settermios(struct tty_struct *tty, struct termios *old)
1560 struct termios *tiosp;
1563 printk("stl_settermios(tty=%x,old=%x)\n", (int) tty, (int) old);
1566 if (tty == (struct tty_struct *) NULL)
1568 portp = tty->driver_data;
1569 if (portp == (stlport_t *) NULL)
1572 tiosp = tty->termios;
1573 if ((tiosp->c_cflag == old->c_cflag) &&
1574 (tiosp->c_iflag == old->c_iflag))
1577 stl_setport(portp, tiosp);
1578 stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0),
1580 if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) {
1581 tty->hw_stopped = 0;
1584 if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
1585 wake_up_interruptible(&portp->open_wait);
1588 /*****************************************************************************/
1591 * Attempt to flow control who ever is sending us data. Based on termios
1592 * settings use software or/and hardware flow control.
1595 static void stl_throttle(struct tty_struct *tty)
1600 printk("stl_throttle(tty=%x)\n", (int) tty);
1603 if (tty == (struct tty_struct *) NULL)
1605 portp = tty->driver_data;
1606 if (portp == (stlport_t *) NULL)
1608 stl_flowctrl(portp, 0);
1611 /*****************************************************************************/
1614 * Unflow control the device sending us data...
1617 static void stl_unthrottle(struct tty_struct *tty)
1622 printk("stl_unthrottle(tty=%x)\n", (int) tty);
1625 if (tty == (struct tty_struct *) NULL)
1627 portp = tty->driver_data;
1628 if (portp == (stlport_t *) NULL)
1630 stl_flowctrl(portp, 1);
1633 /*****************************************************************************/
1636 * Stop the transmitter. Basically to do this we will just turn TX
1640 static void stl_stop(struct tty_struct *tty)
1645 printk("stl_stop(tty=%x)\n", (int) tty);
1648 if (tty == (struct tty_struct *) NULL)
1650 portp = tty->driver_data;
1651 if (portp == (stlport_t *) NULL)
1653 stl_startrxtx(portp, -1, 0);
1656 /*****************************************************************************/
1659 * Start the transmitter again. Just turn TX interrupts back on.
1662 static void stl_start(struct tty_struct *tty)
1667 printk("stl_start(tty=%x)\n", (int) tty);
1670 if (tty == (struct tty_struct *) NULL)
1672 portp = tty->driver_data;
1673 if (portp == (stlport_t *) NULL)
1675 stl_startrxtx(portp, -1, 1);
1678 /*****************************************************************************/
1681 * Hangup this port. This is pretty much like closing the port, only
1682 * a little more brutal. No waiting for data to drain. Shutdown the
1683 * port and maybe drop signals.
1686 static void stl_hangup(struct tty_struct *tty)
1691 printk("stl_hangup(tty=%x)\n", (int) tty);
1694 if (tty == (struct tty_struct *) NULL)
1696 portp = tty->driver_data;
1697 if (portp == (stlport_t *) NULL)
1700 portp->flags &= ~ASYNC_INITIALIZED;
1701 stl_disableintrs(portp);
1702 if (tty->termios->c_cflag & HUPCL)
1703 stl_setsignals(portp, 0, 0);
1704 stl_enablerxtx(portp, 0, 0);
1705 stl_flushbuffer(tty);
1707 set_bit(TTY_IO_ERROR, &tty->flags);
1708 if (portp->tx.buf != (char *) NULL) {
1709 kfree(portp->tx.buf);
1710 portp->tx.buf = (char *) NULL;
1711 portp->tx.head = (char *) NULL;
1712 portp->tx.tail = (char *) NULL;
1714 portp->tty = (struct tty_struct *) NULL;
1715 portp->flags &= ~ASYNC_NORMAL_ACTIVE;
1716 portp->refcount = 0;
1717 wake_up_interruptible(&portp->open_wait);
1720 /*****************************************************************************/
1722 static void stl_flushbuffer(struct tty_struct *tty)
1727 printk("stl_flushbuffer(tty=%x)\n", (int) tty);
1730 if (tty == (struct tty_struct *) NULL)
1732 portp = tty->driver_data;
1733 if (portp == (stlport_t *) NULL)
1740 /*****************************************************************************/
1742 static void stl_breakctl(struct tty_struct *tty, int state)
1747 printk("stl_breakctl(tty=%x,state=%d)\n", (int) tty, state);
1750 if (tty == (struct tty_struct *) NULL)
1752 portp = tty->driver_data;
1753 if (portp == (stlport_t *) NULL)
1756 stl_sendbreak(portp, ((state == -1) ? 1 : 2));
1759 /*****************************************************************************/
1761 static void stl_waituntilsent(struct tty_struct *tty, int timeout)
1767 printk("stl_waituntilsent(tty=%x,timeout=%d)\n", (int) tty, timeout);
1770 if (tty == (struct tty_struct *) NULL)
1772 portp = tty->driver_data;
1773 if (portp == (stlport_t *) NULL)
1778 tend = jiffies + timeout;
1780 while (stl_datastate(portp)) {
1781 if (signal_pending(current))
1783 msleep_interruptible(20);
1784 if (time_after_eq(jiffies, tend))
1789 /*****************************************************************************/
1791 static void stl_sendxchar(struct tty_struct *tty, char ch)
1796 printk("stl_sendxchar(tty=%x,ch=%x)\n", (int) tty, ch);
1799 if (tty == (struct tty_struct *) NULL)
1801 portp = tty->driver_data;
1802 if (portp == (stlport_t *) NULL)
1805 if (ch == STOP_CHAR(tty))
1806 stl_sendflow(portp, 0);
1807 else if (ch == START_CHAR(tty))
1808 stl_sendflow(portp, 1);
1810 stl_putchar(tty, ch);
1813 /*****************************************************************************/
1818 * Format info for a specified port. The line is deliberately limited
1819 * to 80 characters. (If it is too long it will be truncated, if too
1820 * short then padded with spaces).
1823 static int stl_portinfo(stlport_t *portp, int portnr, char *pos)
1829 sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d",
1830 portnr, (portp->hwid == 1) ? "SC26198" : "CD1400",
1831 (int) portp->stats.txtotal, (int) portp->stats.rxtotal);
1833 if (portp->stats.rxframing)
1834 sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing);
1835 if (portp->stats.rxparity)
1836 sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity);
1837 if (portp->stats.rxbreaks)
1838 sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks);
1839 if (portp->stats.rxoverrun)
1840 sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun);
1842 sigs = stl_getsignals(portp);
1843 cnt = sprintf(sp, "%s%s%s%s%s ",
1844 (sigs & TIOCM_RTS) ? "|RTS" : "",
1845 (sigs & TIOCM_CTS) ? "|CTS" : "",
1846 (sigs & TIOCM_DTR) ? "|DTR" : "",
1847 (sigs & TIOCM_CD) ? "|DCD" : "",
1848 (sigs & TIOCM_DSR) ? "|DSR" : "");
1852 for (cnt = (sp - pos); (cnt < (MAXLINE - 1)); cnt++)
1855 pos[(MAXLINE - 2)] = '+';
1856 pos[(MAXLINE - 1)] = '\n';
1861 /*****************************************************************************/
1864 * Port info, read from the /proc file system.
1867 static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data)
1872 int brdnr, panelnr, portnr, totalport;
1877 printk("stl_readproc(page=%x,start=%x,off=%x,count=%d,eof=%x,"
1878 "data=%x\n", (int) page, (int) start, (int) off, count,
1879 (int) eof, (int) data);
1887 pos += sprintf(pos, "%s: version %s", stl_drvtitle,
1889 while (pos < (page + MAXLINE - 1))
1896 * We scan through for each board, panel and port. The offset is
1897 * calculated on the fly, and irrelevant ports are skipped.
1899 for (brdnr = 0; (brdnr < stl_nrbrds); brdnr++) {
1900 brdp = stl_brds[brdnr];
1901 if (brdp == (stlbrd_t *) NULL)
1903 if (brdp->state == 0)
1906 maxoff = curoff + (brdp->nrports * MAXLINE);
1907 if (off >= maxoff) {
1912 totalport = brdnr * STL_MAXPORTS;
1913 for (panelnr = 0; (panelnr < brdp->nrpanels); panelnr++) {
1914 panelp = brdp->panels[panelnr];
1915 if (panelp == (stlpanel_t *) NULL)
1918 maxoff = curoff + (panelp->nrports * MAXLINE);
1919 if (off >= maxoff) {
1921 totalport += panelp->nrports;
1925 for (portnr = 0; (portnr < panelp->nrports); portnr++,
1927 portp = panelp->ports[portnr];
1928 if (portp == (stlport_t *) NULL)
1930 if (off >= (curoff += MAXLINE))
1932 if ((pos - page + MAXLINE) > count)
1934 pos += stl_portinfo(portp, totalport, pos);
1943 return (pos - page);
1946 /*****************************************************************************/
1949 * All board interrupts are vectored through here first. This code then
1950 * calls off to the approrpriate board interrupt handlers.
1953 static irqreturn_t stl_intr(int irq, void *dev_id, struct pt_regs *regs)
1955 stlbrd_t *brdp = (stlbrd_t *) dev_id;
1958 printk("stl_intr(brdp=%x,irq=%d,regs=%x)\n", (int) brdp, irq,
1962 return IRQ_RETVAL((* brdp->isr)(brdp));
1965 /*****************************************************************************/
1968 * Interrupt service routine for EasyIO board types.
1971 static int stl_eiointr(stlbrd_t *brdp)
1974 unsigned int iobase;
1977 panelp = brdp->panels[0];
1978 iobase = panelp->iobase;
1979 while (inb(brdp->iostatus) & EIO_INTRPEND) {
1981 (* panelp->isr)(panelp, iobase);
1986 /*****************************************************************************/
1989 * Interrupt service routine for ECH-AT board types.
1992 static int stl_echatintr(stlbrd_t *brdp)
1995 unsigned int ioaddr;
1999 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
2001 while (inb(brdp->iostatus) & ECH_INTRPEND) {
2003 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
2004 ioaddr = brdp->bnkstataddr[bnknr];
2005 if (inb(ioaddr) & ECH_PNLINTRPEND) {
2006 panelp = brdp->bnk2panel[bnknr];
2007 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
2012 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
2017 /*****************************************************************************/
2020 * Interrupt service routine for ECH-MCA board types.
2023 static int stl_echmcaintr(stlbrd_t *brdp)
2026 unsigned int ioaddr;
2030 while (inb(brdp->iostatus) & ECH_INTRPEND) {
2032 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
2033 ioaddr = brdp->bnkstataddr[bnknr];
2034 if (inb(ioaddr) & ECH_PNLINTRPEND) {
2035 panelp = brdp->bnk2panel[bnknr];
2036 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
2043 /*****************************************************************************/
2046 * Interrupt service routine for ECH-PCI board types.
2049 static int stl_echpciintr(stlbrd_t *brdp)
2052 unsigned int ioaddr;
2058 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
2059 outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl);
2060 ioaddr = brdp->bnkstataddr[bnknr];
2061 if (inb(ioaddr) & ECH_PNLINTRPEND) {
2062 panelp = brdp->bnk2panel[bnknr];
2063 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
2074 /*****************************************************************************/
2077 * Interrupt service routine for ECH-8/64-PCI board types.
2080 static int stl_echpci64intr(stlbrd_t *brdp)
2083 unsigned int ioaddr;
2087 while (inb(brdp->ioctrl) & 0x1) {
2089 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
2090 ioaddr = brdp->bnkstataddr[bnknr];
2091 if (inb(ioaddr) & ECH_PNLINTRPEND) {
2092 panelp = brdp->bnk2panel[bnknr];
2093 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
2101 /*****************************************************************************/
2104 * Service an off-level request for some channel.
2106 static void stl_offintr(void *private)
2109 struct tty_struct *tty;
2110 unsigned int oldsigs;
2115 printk("stl_offintr(portp=%x)\n", (int) portp);
2118 if (portp == (stlport_t *) NULL)
2122 if (tty == (struct tty_struct *) NULL)
2126 if (test_bit(ASYI_TXLOW, &portp->istate)) {
2129 if (test_bit(ASYI_DCDCHANGE, &portp->istate)) {
2130 clear_bit(ASYI_DCDCHANGE, &portp->istate);
2131 oldsigs = portp->sigs;
2132 portp->sigs = stl_getsignals(portp);
2133 if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0))
2134 wake_up_interruptible(&portp->open_wait);
2135 if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0)) {
2136 if (portp->flags & ASYNC_CHECK_CD)
2137 tty_hangup(tty); /* FIXME: module removal race here - AKPM */
2143 /*****************************************************************************/
2146 * Initialize all the ports on a panel.
2149 static int __init stl_initports(stlbrd_t *brdp, stlpanel_t *panelp)
2155 printk("stl_initports(brdp=%x,panelp=%x)\n", (int) brdp, (int) panelp);
2158 chipmask = stl_panelinit(brdp, panelp);
2161 * All UART's are initialized (if found!). Now go through and setup
2162 * each ports data structures.
2164 for (i = 0; (i < panelp->nrports); i++) {
2165 portp = kzalloc(sizeof(stlport_t), GFP_KERNEL);
2167 printk("STALLION: failed to allocate memory "
2168 "(size=%d)\n", sizeof(stlport_t));
2172 portp->magic = STL_PORTMAGIC;
2174 portp->brdnr = panelp->brdnr;
2175 portp->panelnr = panelp->panelnr;
2176 portp->uartp = panelp->uartp;
2177 portp->clk = brdp->clk;
2178 portp->baud_base = STL_BAUDBASE;
2179 portp->close_delay = STL_CLOSEDELAY;
2180 portp->closing_wait = 30 * HZ;
2181 INIT_WORK(&portp->tqueue, stl_offintr, portp);
2182 init_waitqueue_head(&portp->open_wait);
2183 init_waitqueue_head(&portp->close_wait);
2184 portp->stats.brd = portp->brdnr;
2185 portp->stats.panel = portp->panelnr;
2186 portp->stats.port = portp->portnr;
2187 panelp->ports[i] = portp;
2188 stl_portinit(brdp, panelp, portp);
2194 /*****************************************************************************/
2197 * Try to find and initialize an EasyIO board.
2200 static inline int stl_initeio(stlbrd_t *brdp)
2203 unsigned int status;
2208 printk("stl_initeio(brdp=%x)\n", (int) brdp);
2211 brdp->ioctrl = brdp->ioaddr1 + 1;
2212 brdp->iostatus = brdp->ioaddr1 + 2;
2214 status = inb(brdp->iostatus);
2215 if ((status & EIO_IDBITMASK) == EIO_MK3)
2219 * Handle board specific stuff now. The real difference is PCI
2222 if (brdp->brdtype == BRD_EASYIOPCI) {
2223 brdp->iosize1 = 0x80;
2224 brdp->iosize2 = 0x80;
2225 name = "serial(EIO-PCI)";
2226 outb(0x41, (brdp->ioaddr2 + 0x4c));
2229 name = "serial(EIO)";
2230 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2231 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2232 printk("STALLION: invalid irq=%d for brd=%d\n",
2233 brdp->irq, brdp->brdnr);
2236 outb((stl_vecmap[brdp->irq] | EIO_0WS |
2237 ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)),
2241 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
2242 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
2243 "%x conflicts with another device\n", brdp->brdnr,
2248 if (brdp->iosize2 > 0)
2249 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
2250 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
2251 "address %x conflicts with another device\n",
2252 brdp->brdnr, brdp->ioaddr2);
2253 printk(KERN_WARNING "STALLION: Warning, also "
2254 "releasing board %d I/O address %x \n",
2255 brdp->brdnr, brdp->ioaddr1);
2256 release_region(brdp->ioaddr1, brdp->iosize1);
2261 * Everything looks OK, so let's go ahead and probe for the hardware.
2263 brdp->clk = CD1400_CLK;
2264 brdp->isr = stl_eiointr;
2266 switch (status & EIO_IDBITMASK) {
2268 brdp->clk = CD1400_CLK8M;
2278 switch (status & EIO_BRDMASK) {
2297 * We have verified that the board is actually present, so now we
2298 * can complete the setup.
2301 panelp = kzalloc(sizeof(stlpanel_t), GFP_KERNEL);
2303 printk(KERN_WARNING "STALLION: failed to allocate memory "
2304 "(size=%d)\n", sizeof(stlpanel_t));
2308 panelp->magic = STL_PANELMAGIC;
2309 panelp->brdnr = brdp->brdnr;
2310 panelp->panelnr = 0;
2311 panelp->nrports = brdp->nrports;
2312 panelp->iobase = brdp->ioaddr1;
2313 panelp->hwid = status;
2314 if ((status & EIO_IDBITMASK) == EIO_MK3) {
2315 panelp->uartp = (void *) &stl_sc26198uart;
2316 panelp->isr = stl_sc26198intr;
2318 panelp->uartp = (void *) &stl_cd1400uart;
2319 panelp->isr = stl_cd1400eiointr;
2322 brdp->panels[0] = panelp;
2324 brdp->state |= BRD_FOUND;
2325 brdp->hwid = status;
2326 if (request_irq(brdp->irq, stl_intr, SA_SHIRQ, name, brdp) != 0) {
2327 printk("STALLION: failed to register interrupt "
2328 "routine for %s irq=%d\n", name, brdp->irq);
2336 /*****************************************************************************/
2339 * Try to find an ECH board and initialize it. This code is capable of
2340 * dealing with all types of ECH board.
2343 static inline int stl_initech(stlbrd_t *brdp)
2346 unsigned int status, nxtid, ioaddr, conflict;
2347 int panelnr, banknr, i;
2351 printk("stl_initech(brdp=%x)\n", (int) brdp);
2358 * Set up the initial board register contents for boards. This varies a
2359 * bit between the different board types. So we need to handle each
2360 * separately. Also do a check that the supplied IRQ is good.
2362 switch (brdp->brdtype) {
2365 brdp->isr = stl_echatintr;
2366 brdp->ioctrl = brdp->ioaddr1 + 1;
2367 brdp->iostatus = brdp->ioaddr1 + 1;
2368 status = inb(brdp->iostatus);
2369 if ((status & ECH_IDBITMASK) != ECH_ID)
2371 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2372 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2373 printk("STALLION: invalid irq=%d for brd=%d\n",
2374 brdp->irq, brdp->brdnr);
2377 status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1);
2378 status |= (stl_vecmap[brdp->irq] << 1);
2379 outb((status | ECH_BRDRESET), brdp->ioaddr1);
2380 brdp->ioctrlval = ECH_INTENABLE |
2381 ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE);
2382 for (i = 0; (i < 10); i++)
2383 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
2386 name = "serial(EC8/32)";
2387 outb(status, brdp->ioaddr1);
2391 brdp->isr = stl_echmcaintr;
2392 brdp->ioctrl = brdp->ioaddr1 + 0x20;
2393 brdp->iostatus = brdp->ioctrl;
2394 status = inb(brdp->iostatus);
2395 if ((status & ECH_IDBITMASK) != ECH_ID)
2397 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2398 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2399 printk("STALLION: invalid irq=%d for brd=%d\n",
2400 brdp->irq, brdp->brdnr);
2403 outb(ECHMC_BRDRESET, brdp->ioctrl);
2404 outb(ECHMC_INTENABLE, brdp->ioctrl);
2406 name = "serial(EC8/32-MC)";
2410 brdp->isr = stl_echpciintr;
2411 brdp->ioctrl = brdp->ioaddr1 + 2;
2414 name = "serial(EC8/32-PCI)";
2418 brdp->isr = stl_echpci64intr;
2419 brdp->ioctrl = brdp->ioaddr2 + 0x40;
2420 outb(0x43, (brdp->ioaddr1 + 0x4c));
2421 brdp->iosize1 = 0x80;
2422 brdp->iosize2 = 0x80;
2423 name = "serial(EC8/64-PCI)";
2427 printk("STALLION: unknown board type=%d\n", brdp->brdtype);
2433 * Check boards for possible IO address conflicts and return fail status
2434 * if an IO conflict found.
2436 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
2437 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
2438 "%x conflicts with another device\n", brdp->brdnr,
2443 if (brdp->iosize2 > 0)
2444 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
2445 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
2446 "address %x conflicts with another device\n",
2447 brdp->brdnr, brdp->ioaddr2);
2448 printk(KERN_WARNING "STALLION: Warning, also "
2449 "releasing board %d I/O address %x \n",
2450 brdp->brdnr, brdp->ioaddr1);
2451 release_region(brdp->ioaddr1, brdp->iosize1);
2456 * Scan through the secondary io address space looking for panels.
2457 * As we find'em allocate and initialize panel structures for each.
2459 brdp->clk = CD1400_CLK;
2460 brdp->hwid = status;
2462 ioaddr = brdp->ioaddr2;
2467 for (i = 0; (i < STL_MAXPANELS); i++) {
2468 if (brdp->brdtype == BRD_ECHPCI) {
2469 outb(nxtid, brdp->ioctrl);
2470 ioaddr = brdp->ioaddr2;
2472 status = inb(ioaddr + ECH_PNLSTATUS);
2473 if ((status & ECH_PNLIDMASK) != nxtid)
2475 panelp = kzalloc(sizeof(stlpanel_t), GFP_KERNEL);
2477 printk("STALLION: failed to allocate memory "
2478 "(size=%d)\n", sizeof(stlpanel_t));
2481 panelp->magic = STL_PANELMAGIC;
2482 panelp->brdnr = brdp->brdnr;
2483 panelp->panelnr = panelnr;
2484 panelp->iobase = ioaddr;
2485 panelp->pagenr = nxtid;
2486 panelp->hwid = status;
2487 brdp->bnk2panel[banknr] = panelp;
2488 brdp->bnkpageaddr[banknr] = nxtid;
2489 brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS;
2491 if (status & ECH_PNLXPID) {
2492 panelp->uartp = (void *) &stl_sc26198uart;
2493 panelp->isr = stl_sc26198intr;
2494 if (status & ECH_PNL16PORT) {
2495 panelp->nrports = 16;
2496 brdp->bnk2panel[banknr] = panelp;
2497 brdp->bnkpageaddr[banknr] = nxtid;
2498 brdp->bnkstataddr[banknr++] = ioaddr + 4 +
2501 panelp->nrports = 8;
2504 panelp->uartp = (void *) &stl_cd1400uart;
2505 panelp->isr = stl_cd1400echintr;
2506 if (status & ECH_PNL16PORT) {
2507 panelp->nrports = 16;
2508 panelp->ackmask = 0x80;
2509 if (brdp->brdtype != BRD_ECHPCI)
2510 ioaddr += EREG_BANKSIZE;
2511 brdp->bnk2panel[banknr] = panelp;
2512 brdp->bnkpageaddr[banknr] = ++nxtid;
2513 brdp->bnkstataddr[banknr++] = ioaddr +
2516 panelp->nrports = 8;
2517 panelp->ackmask = 0xc0;
2522 ioaddr += EREG_BANKSIZE;
2523 brdp->nrports += panelp->nrports;
2524 brdp->panels[panelnr++] = panelp;
2525 if ((brdp->brdtype != BRD_ECHPCI) &&
2526 (ioaddr >= (brdp->ioaddr2 + brdp->iosize2)))
2530 brdp->nrpanels = panelnr;
2531 brdp->nrbnks = banknr;
2532 if (brdp->brdtype == BRD_ECH)
2533 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
2535 brdp->state |= BRD_FOUND;
2536 if (request_irq(brdp->irq, stl_intr, SA_SHIRQ, name, brdp) != 0) {
2537 printk("STALLION: failed to register interrupt "
2538 "routine for %s irq=%d\n", name, brdp->irq);
2547 /*****************************************************************************/
2550 * Initialize and configure the specified board.
2551 * Scan through all the boards in the configuration and see what we
2552 * can find. Handle EIO and the ECH boards a little differently here
2553 * since the initial search and setup is very different.
2556 static int __init stl_brdinit(stlbrd_t *brdp)
2561 printk("stl_brdinit(brdp=%x)\n", (int) brdp);
2564 switch (brdp->brdtype) {
2576 printk("STALLION: board=%d is unknown board type=%d\n",
2577 brdp->brdnr, brdp->brdtype);
2581 stl_brds[brdp->brdnr] = brdp;
2582 if ((brdp->state & BRD_FOUND) == 0) {
2583 printk("STALLION: %s board not found, board=%d io=%x irq=%d\n",
2584 stl_brdnames[brdp->brdtype], brdp->brdnr,
2585 brdp->ioaddr1, brdp->irq);
2589 for (i = 0; (i < STL_MAXPANELS); i++)
2590 if (brdp->panels[i] != (stlpanel_t *) NULL)
2591 stl_initports(brdp, brdp->panels[i]);
2593 printk("STALLION: %s found, board=%d io=%x irq=%d "
2594 "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype],
2595 brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels,
2600 /*****************************************************************************/
2603 * Find the next available board number that is free.
2606 static inline int stl_getbrdnr(void)
2610 for (i = 0; (i < STL_MAXBRDS); i++) {
2611 if (stl_brds[i] == (stlbrd_t *) NULL) {
2612 if (i >= stl_nrbrds)
2620 /*****************************************************************************/
2625 * We have a Stallion board. Allocate a board structure and
2626 * initialize it. Read its IO and IRQ resources from PCI
2627 * configuration space.
2630 static inline int stl_initpcibrd(int brdtype, struct pci_dev *devp)
2635 printk("stl_initpcibrd(brdtype=%d,busnr=%x,devnr=%x)\n", brdtype,
2636 devp->bus->number, devp->devfn);
2639 if (pci_enable_device(devp))
2641 if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL)
2643 if ((brdp->brdnr = stl_getbrdnr()) < 0) {
2644 printk("STALLION: too many boards found, "
2645 "maximum supported %d\n", STL_MAXBRDS);
2648 brdp->brdtype = brdtype;
2651 * Different Stallion boards use the BAR registers in different ways,
2652 * so set up io addresses based on board type.
2655 printk("%s(%d): BAR[]=%x,%x,%x,%x IRQ=%x\n", __FILE__, __LINE__,
2656 pci_resource_start(devp, 0), pci_resource_start(devp, 1),
2657 pci_resource_start(devp, 2), pci_resource_start(devp, 3), devp->irq);
2661 * We have all resources from the board, so let's setup the actual
2662 * board structure now.
2666 brdp->ioaddr2 = pci_resource_start(devp, 0);
2667 brdp->ioaddr1 = pci_resource_start(devp, 1);
2670 brdp->ioaddr2 = pci_resource_start(devp, 2);
2671 brdp->ioaddr1 = pci_resource_start(devp, 1);
2674 brdp->ioaddr1 = pci_resource_start(devp, 2);
2675 brdp->ioaddr2 = pci_resource_start(devp, 1);
2678 printk("STALLION: unknown PCI board type=%d\n", brdtype);
2682 brdp->irq = devp->irq;
2688 /*****************************************************************************/
2691 * Find all Stallion PCI boards that might be installed. Initialize each
2692 * one as it is found.
2696 static inline int stl_findpcibrds(void)
2698 struct pci_dev *dev = NULL;
2702 printk("stl_findpcibrds()\n");
2705 for (i = 0; (i < stl_nrpcibrds); i++)
2706 while ((dev = pci_find_device(stl_pcibrds[i].vendid,
2707 stl_pcibrds[i].devid, dev))) {
2710 * Found a device on the PCI bus that has our vendor and
2711 * device ID. Need to check now that it is really us.
2713 if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE)
2716 rc = stl_initpcibrd(stl_pcibrds[i].brdtype, dev);
2726 /*****************************************************************************/
2729 * Scan through all the boards in the configuration and see what we
2730 * can find. Handle EIO and the ECH boards a little differently here
2731 * since the initial search and setup is too different.
2734 static inline int stl_initbrds(void)
2741 printk("stl_initbrds()\n");
2744 if (stl_nrbrds > STL_MAXBRDS) {
2745 printk("STALLION: too many boards in configuration table, "
2746 "truncating to %d\n", STL_MAXBRDS);
2747 stl_nrbrds = STL_MAXBRDS;
2751 * Firstly scan the list of static boards configured. Allocate
2752 * resources and initialize the boards as found.
2754 for (i = 0; (i < stl_nrbrds); i++) {
2755 confp = &stl_brdconf[i];
2756 stl_parsebrd(confp, stl_brdsp[i]);
2757 if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL)
2760 brdp->brdtype = confp->brdtype;
2761 brdp->ioaddr1 = confp->ioaddr1;
2762 brdp->ioaddr2 = confp->ioaddr2;
2763 brdp->irq = confp->irq;
2764 brdp->irqtype = confp->irqtype;
2769 * Find any dynamically supported boards. That is via module load
2770 * line options or auto-detected on the PCI bus.
2780 /*****************************************************************************/
2783 * Return the board stats structure to user app.
2786 static int stl_getbrdstats(combrd_t __user *bp)
2792 if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t)))
2794 if (stl_brdstats.brd >= STL_MAXBRDS)
2796 brdp = stl_brds[stl_brdstats.brd];
2797 if (brdp == (stlbrd_t *) NULL)
2800 memset(&stl_brdstats, 0, sizeof(combrd_t));
2801 stl_brdstats.brd = brdp->brdnr;
2802 stl_brdstats.type = brdp->brdtype;
2803 stl_brdstats.hwid = brdp->hwid;
2804 stl_brdstats.state = brdp->state;
2805 stl_brdstats.ioaddr = brdp->ioaddr1;
2806 stl_brdstats.ioaddr2 = brdp->ioaddr2;
2807 stl_brdstats.irq = brdp->irq;
2808 stl_brdstats.nrpanels = brdp->nrpanels;
2809 stl_brdstats.nrports = brdp->nrports;
2810 for (i = 0; (i < brdp->nrpanels); i++) {
2811 panelp = brdp->panels[i];
2812 stl_brdstats.panels[i].panel = i;
2813 stl_brdstats.panels[i].hwid = panelp->hwid;
2814 stl_brdstats.panels[i].nrports = panelp->nrports;
2817 return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0;
2820 /*****************************************************************************/
2823 * Resolve the referenced port number into a port struct pointer.
2826 static stlport_t *stl_getport(int brdnr, int panelnr, int portnr)
2831 if ((brdnr < 0) || (brdnr >= STL_MAXBRDS))
2832 return((stlport_t *) NULL);
2833 brdp = stl_brds[brdnr];
2834 if (brdp == (stlbrd_t *) NULL)
2835 return((stlport_t *) NULL);
2836 if ((panelnr < 0) || (panelnr >= brdp->nrpanels))
2837 return((stlport_t *) NULL);
2838 panelp = brdp->panels[panelnr];
2839 if (panelp == (stlpanel_t *) NULL)
2840 return((stlport_t *) NULL);
2841 if ((portnr < 0) || (portnr >= panelp->nrports))
2842 return((stlport_t *) NULL);
2843 return(panelp->ports[portnr]);
2846 /*****************************************************************************/
2849 * Return the port stats structure to user app. A NULL port struct
2850 * pointer passed in means that we need to find out from the app
2851 * what port to get stats for (used through board control device).
2854 static int stl_getportstats(stlport_t *portp, comstats_t __user *cp)
2856 unsigned char *head, *tail;
2857 unsigned long flags;
2860 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2862 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2864 if (portp == (stlport_t *) NULL)
2868 portp->stats.state = portp->istate;
2869 portp->stats.flags = portp->flags;
2870 portp->stats.hwid = portp->hwid;
2872 portp->stats.ttystate = 0;
2873 portp->stats.cflags = 0;
2874 portp->stats.iflags = 0;
2875 portp->stats.oflags = 0;
2876 portp->stats.lflags = 0;
2877 portp->stats.rxbuffered = 0;
2881 if (portp->tty != (struct tty_struct *) NULL) {
2882 if (portp->tty->driver_data == portp) {
2883 portp->stats.ttystate = portp->tty->flags;
2884 /* No longer available as a statistic */
2885 portp->stats.rxbuffered = 1; /*portp->tty->flip.count; */
2886 if (portp->tty->termios != (struct termios *) NULL) {
2887 portp->stats.cflags = portp->tty->termios->c_cflag;
2888 portp->stats.iflags = portp->tty->termios->c_iflag;
2889 portp->stats.oflags = portp->tty->termios->c_oflag;
2890 portp->stats.lflags = portp->tty->termios->c_lflag;
2894 restore_flags(flags);
2896 head = portp->tx.head;
2897 tail = portp->tx.tail;
2898 portp->stats.txbuffered = ((head >= tail) ? (head - tail) :
2899 (STL_TXBUFSIZE - (tail - head)));
2901 portp->stats.signals = (unsigned long) stl_getsignals(portp);
2903 return copy_to_user(cp, &portp->stats,
2904 sizeof(comstats_t)) ? -EFAULT : 0;
2907 /*****************************************************************************/
2910 * Clear the port stats structure. We also return it zeroed out...
2913 static int stl_clrportstats(stlport_t *portp, comstats_t __user *cp)
2916 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2918 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2920 if (portp == (stlport_t *) NULL)
2924 memset(&portp->stats, 0, sizeof(comstats_t));
2925 portp->stats.brd = portp->brdnr;
2926 portp->stats.panel = portp->panelnr;
2927 portp->stats.port = portp->portnr;
2928 return copy_to_user(cp, &portp->stats,
2929 sizeof(comstats_t)) ? -EFAULT : 0;
2932 /*****************************************************************************/
2935 * Return the entire driver ports structure to a user app.
2938 static int stl_getportstruct(stlport_t __user *arg)
2942 if (copy_from_user(&stl_dummyport, arg, sizeof(stlport_t)))
2944 portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr,
2945 stl_dummyport.portnr);
2948 return copy_to_user(arg, portp, sizeof(stlport_t)) ? -EFAULT : 0;
2951 /*****************************************************************************/
2954 * Return the entire driver board structure to a user app.
2957 static int stl_getbrdstruct(stlbrd_t __user *arg)
2961 if (copy_from_user(&stl_dummybrd, arg, sizeof(stlbrd_t)))
2963 if ((stl_dummybrd.brdnr < 0) || (stl_dummybrd.brdnr >= STL_MAXBRDS))
2965 brdp = stl_brds[stl_dummybrd.brdnr];
2968 return copy_to_user(arg, brdp, sizeof(stlbrd_t)) ? -EFAULT : 0;
2971 /*****************************************************************************/
2974 * The "staliomem" device is also required to do some special operations
2975 * on the board and/or ports. In this driver it is mostly used for stats
2979 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg)
2982 void __user *argp = (void __user *)arg;
2985 printk("stl_memioctl(ip=%x,fp=%x,cmd=%x,arg=%x)\n", (int) ip,
2986 (int) fp, cmd, (int) arg);
2990 if (brdnr >= STL_MAXBRDS)
2995 case COM_GETPORTSTATS:
2996 rc = stl_getportstats(NULL, argp);
2998 case COM_CLRPORTSTATS:
2999 rc = stl_clrportstats(NULL, argp);
3001 case COM_GETBRDSTATS:
3002 rc = stl_getbrdstats(argp);
3005 rc = stl_getportstruct(argp);
3008 rc = stl_getbrdstruct(argp);
3018 static struct tty_operations stl_ops = {
3022 .put_char = stl_putchar,
3023 .flush_chars = stl_flushchars,
3024 .write_room = stl_writeroom,
3025 .chars_in_buffer = stl_charsinbuffer,
3027 .set_termios = stl_settermios,
3028 .throttle = stl_throttle,
3029 .unthrottle = stl_unthrottle,
3032 .hangup = stl_hangup,
3033 .flush_buffer = stl_flushbuffer,
3034 .break_ctl = stl_breakctl,
3035 .wait_until_sent = stl_waituntilsent,
3036 .send_xchar = stl_sendxchar,
3037 .read_proc = stl_readproc,
3038 .tiocmget = stl_tiocmget,
3039 .tiocmset = stl_tiocmset,
3042 /*****************************************************************************/
3044 static int __init stl_init(void)
3047 printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion);
3051 stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS);
3056 * Allocate a temporary write buffer.
3058 stl_tmpwritebuf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL);
3059 if (!stl_tmpwritebuf)
3060 printk("STALLION: failed to allocate memory (size=%d)\n",
3064 * Set up a character driver for per board stuff. This is mainly used
3065 * to do stats ioctls on the ports.
3067 if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem))
3068 printk("STALLION: failed to register serial board device\n");
3070 stallion_class = class_create(THIS_MODULE, "staliomem");
3071 for (i = 0; i < 4; i++)
3072 class_device_create(stallion_class, NULL,
3073 MKDEV(STL_SIOMEMMAJOR, i), NULL,
3076 stl_serial->owner = THIS_MODULE;
3077 stl_serial->driver_name = stl_drvname;
3078 stl_serial->name = "ttyE";
3079 stl_serial->devfs_name = "tts/E";
3080 stl_serial->major = STL_SERIALMAJOR;
3081 stl_serial->minor_start = 0;
3082 stl_serial->type = TTY_DRIVER_TYPE_SERIAL;
3083 stl_serial->subtype = SERIAL_TYPE_NORMAL;
3084 stl_serial->init_termios = stl_deftermios;
3085 stl_serial->flags = TTY_DRIVER_REAL_RAW;
3086 tty_set_operations(stl_serial, &stl_ops);
3088 if (tty_register_driver(stl_serial)) {
3089 put_tty_driver(stl_serial);
3090 printk("STALLION: failed to register serial driver\n");
3097 /*****************************************************************************/
3098 /* CD1400 HARDWARE FUNCTIONS */
3099 /*****************************************************************************/
3102 * These functions get/set/update the registers of the cd1400 UARTs.
3103 * Access to the cd1400 registers is via an address/data io port pair.
3104 * (Maybe should make this inline...)
3107 static int stl_cd1400getreg(stlport_t *portp, int regnr)
3109 outb((regnr + portp->uartaddr), portp->ioaddr);
3110 return inb(portp->ioaddr + EREG_DATA);
3113 static void stl_cd1400setreg(stlport_t *portp, int regnr, int value)
3115 outb((regnr + portp->uartaddr), portp->ioaddr);
3116 outb(value, portp->ioaddr + EREG_DATA);
3119 static int stl_cd1400updatereg(stlport_t *portp, int regnr, int value)
3121 outb((regnr + portp->uartaddr), portp->ioaddr);
3122 if (inb(portp->ioaddr + EREG_DATA) != value) {
3123 outb(value, portp->ioaddr + EREG_DATA);
3129 /*****************************************************************************/
3132 * Inbitialize the UARTs in a panel. We don't care what sort of board
3133 * these ports are on - since the port io registers are almost
3134 * identical when dealing with ports.
3137 static int stl_cd1400panelinit(stlbrd_t *brdp, stlpanel_t *panelp)
3141 int nrchips, uartaddr, ioaddr;
3144 printk("stl_panelinit(brdp=%x,panelp=%x)\n", (int) brdp, (int) panelp);
3147 BRDENABLE(panelp->brdnr, panelp->pagenr);
3150 * Check that each chip is present and started up OK.
3153 nrchips = panelp->nrports / CD1400_PORTS;
3154 for (i = 0; (i < nrchips); i++) {
3155 if (brdp->brdtype == BRD_ECHPCI) {
3156 outb((panelp->pagenr + (i >> 1)), brdp->ioctrl);
3157 ioaddr = panelp->iobase;
3159 ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1));
3161 uartaddr = (i & 0x01) ? 0x080 : 0;
3162 outb((GFRCR + uartaddr), ioaddr);
3163 outb(0, (ioaddr + EREG_DATA));
3164 outb((CCR + uartaddr), ioaddr);
3165 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
3166 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
3167 outb((GFRCR + uartaddr), ioaddr);
3168 for (j = 0; (j < CCR_MAXWAIT); j++) {
3169 if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0)
3172 if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) {
3173 printk("STALLION: cd1400 not responding, "
3174 "brd=%d panel=%d chip=%d\n",
3175 panelp->brdnr, panelp->panelnr, i);
3178 chipmask |= (0x1 << i);
3179 outb((PPR + uartaddr), ioaddr);
3180 outb(PPR_SCALAR, (ioaddr + EREG_DATA));
3183 BRDDISABLE(panelp->brdnr);
3187 /*****************************************************************************/
3190 * Initialize hardware specific port registers.
3193 static void stl_cd1400portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp)
3196 printk("stl_cd1400portinit(brdp=%x,panelp=%x,portp=%x)\n",
3197 (int) brdp, (int) panelp, (int) portp);
3200 if ((brdp == (stlbrd_t *) NULL) || (panelp == (stlpanel_t *) NULL) ||
3201 (portp == (stlport_t *) NULL))
3204 portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) ||
3205 (portp->portnr < 8)) ? 0 : EREG_BANKSIZE);
3206 portp->uartaddr = (portp->portnr & 0x04) << 5;
3207 portp->pagenr = panelp->pagenr + (portp->portnr >> 3);
3209 BRDENABLE(portp->brdnr, portp->pagenr);
3210 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3211 stl_cd1400setreg(portp, LIVR, (portp->portnr << 3));
3212 portp->hwid = stl_cd1400getreg(portp, GFRCR);
3213 BRDDISABLE(portp->brdnr);
3216 /*****************************************************************************/
3219 * Wait for the command register to be ready. We will poll this,
3220 * since it won't usually take too long to be ready.
3223 static void stl_cd1400ccrwait(stlport_t *portp)
3227 for (i = 0; (i < CCR_MAXWAIT); i++) {
3228 if (stl_cd1400getreg(portp, CCR) == 0) {
3233 printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n",
3234 portp->portnr, portp->panelnr, portp->brdnr);
3237 /*****************************************************************************/
3240 * Set up the cd1400 registers for a port based on the termios port
3244 static void stl_cd1400setport(stlport_t *portp, struct termios *tiosp)
3247 unsigned long flags;
3248 unsigned int clkdiv, baudrate;
3249 unsigned char cor1, cor2, cor3;
3250 unsigned char cor4, cor5, ccr;
3251 unsigned char srer, sreron, sreroff;
3252 unsigned char mcor1, mcor2, rtpr;
3253 unsigned char clk, div;
3269 brdp = stl_brds[portp->brdnr];
3270 if (brdp == (stlbrd_t *) NULL)
3274 * Set up the RX char ignore mask with those RX error types we
3275 * can ignore. We can get the cd1400 to help us out a little here,
3276 * it will ignore parity errors and breaks for us.
3278 portp->rxignoremsk = 0;
3279 if (tiosp->c_iflag & IGNPAR) {
3280 portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN);
3281 cor1 |= COR1_PARIGNORE;
3283 if (tiosp->c_iflag & IGNBRK) {
3284 portp->rxignoremsk |= ST_BREAK;
3285 cor4 |= COR4_IGNBRK;
3288 portp->rxmarkmsk = ST_OVERRUN;
3289 if (tiosp->c_iflag & (INPCK | PARMRK))
3290 portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING);
3291 if (tiosp->c_iflag & BRKINT)
3292 portp->rxmarkmsk |= ST_BREAK;
3295 * Go through the char size, parity and stop bits and set all the
3296 * option register appropriately.
3298 switch (tiosp->c_cflag & CSIZE) {
3313 if (tiosp->c_cflag & CSTOPB)
3318 if (tiosp->c_cflag & PARENB) {
3319 if (tiosp->c_cflag & PARODD)
3320 cor1 |= (COR1_PARENB | COR1_PARODD);
3322 cor1 |= (COR1_PARENB | COR1_PAREVEN);
3324 cor1 |= COR1_PARNONE;
3328 * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing
3329 * space for hardware flow control and the like. This should be set to
3330 * VMIN. Also here we will set the RX data timeout to 10ms - this should
3331 * really be based on VTIME.
3333 cor3 |= FIFO_RXTHRESHOLD;
3337 * Calculate the baud rate timers. For now we will just assume that
3338 * the input and output baud are the same. Could have used a baud
3339 * table here, but this way we can generate virtually any baud rate
3342 baudrate = tiosp->c_cflag & CBAUD;
3343 if (baudrate & CBAUDEX) {
3344 baudrate &= ~CBAUDEX;
3345 if ((baudrate < 1) || (baudrate > 4))
3346 tiosp->c_cflag &= ~CBAUDEX;
3350 baudrate = stl_baudrates[baudrate];
3351 if ((tiosp->c_cflag & CBAUD) == B38400) {
3352 if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3354 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3356 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3358 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3360 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
3361 baudrate = (portp->baud_base / portp->custom_divisor);
3363 if (baudrate > STL_CD1400MAXBAUD)
3364 baudrate = STL_CD1400MAXBAUD;
3367 for (clk = 0; (clk < CD1400_NUMCLKS); clk++) {
3368 clkdiv = ((portp->clk / stl_cd1400clkdivs[clk]) / baudrate);
3372 div = (unsigned char) clkdiv;
3376 * Check what form of modem signaling is required and set it up.
3378 if ((tiosp->c_cflag & CLOCAL) == 0) {
3381 sreron |= SRER_MODEM;
3382 portp->flags |= ASYNC_CHECK_CD;
3384 portp->flags &= ~ASYNC_CHECK_CD;
3388 * Setup cd1400 enhanced modes if we can. In particular we want to
3389 * handle as much of the flow control as possible automatically. As
3390 * well as saving a few CPU cycles it will also greatly improve flow
3391 * control reliability.
3393 if (tiosp->c_iflag & IXON) {
3396 if (tiosp->c_iflag & IXANY)
3400 if (tiosp->c_cflag & CRTSCTS) {
3402 mcor1 |= FIFO_RTSTHRESHOLD;
3406 * All cd1400 register values calculated so go through and set
3411 printk("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3412 portp->portnr, portp->panelnr, portp->brdnr);
3413 printk(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n",
3414 cor1, cor2, cor3, cor4, cor5);
3415 printk(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n",
3416 mcor1, mcor2, rtpr, sreron, sreroff);
3417 printk(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div);
3418 printk(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3419 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
3420 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
3425 BRDENABLE(portp->brdnr, portp->pagenr);
3426 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3));
3427 srer = stl_cd1400getreg(portp, SRER);
3428 stl_cd1400setreg(portp, SRER, 0);
3429 if (stl_cd1400updatereg(portp, COR1, cor1))
3431 if (stl_cd1400updatereg(portp, COR2, cor2))
3433 if (stl_cd1400updatereg(portp, COR3, cor3))
3436 stl_cd1400ccrwait(portp);
3437 stl_cd1400setreg(portp, CCR, CCR_CORCHANGE);
3439 stl_cd1400setreg(portp, COR4, cor4);
3440 stl_cd1400setreg(portp, COR5, cor5);
3441 stl_cd1400setreg(portp, MCOR1, mcor1);
3442 stl_cd1400setreg(portp, MCOR2, mcor2);
3444 stl_cd1400setreg(portp, TCOR, clk);
3445 stl_cd1400setreg(portp, TBPR, div);
3446 stl_cd1400setreg(portp, RCOR, clk);
3447 stl_cd1400setreg(portp, RBPR, div);
3449 stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]);
3450 stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]);
3451 stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]);
3452 stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]);
3453 stl_cd1400setreg(portp, RTPR, rtpr);
3454 mcor1 = stl_cd1400getreg(portp, MSVR1);
3455 if (mcor1 & MSVR1_DCD)
3456 portp->sigs |= TIOCM_CD;
3458 portp->sigs &= ~TIOCM_CD;
3459 stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron));
3460 BRDDISABLE(portp->brdnr);
3461 restore_flags(flags);
3464 /*****************************************************************************/
3467 * Set the state of the DTR and RTS signals.
3470 static void stl_cd1400setsignals(stlport_t *portp, int dtr, int rts)
3472 unsigned char msvr1, msvr2;
3473 unsigned long flags;
3476 printk("stl_cd1400setsignals(portp=%x,dtr=%d,rts=%d)\n",
3477 (int) portp, dtr, rts);
3489 BRDENABLE(portp->brdnr, portp->pagenr);
3490 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3492 stl_cd1400setreg(portp, MSVR2, msvr2);
3494 stl_cd1400setreg(portp, MSVR1, msvr1);
3495 BRDDISABLE(portp->brdnr);
3496 restore_flags(flags);
3499 /*****************************************************************************/
3502 * Return the state of the signals.
3505 static int stl_cd1400getsignals(stlport_t *portp)
3507 unsigned char msvr1, msvr2;
3508 unsigned long flags;
3512 printk("stl_cd1400getsignals(portp=%x)\n", (int) portp);
3517 BRDENABLE(portp->brdnr, portp->pagenr);
3518 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3519 msvr1 = stl_cd1400getreg(portp, MSVR1);
3520 msvr2 = stl_cd1400getreg(portp, MSVR2);
3521 BRDDISABLE(portp->brdnr);
3522 restore_flags(flags);
3525 sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0;
3526 sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0;
3527 sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0;
3528 sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0;
3530 sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0;
3531 sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0;
3538 /*****************************************************************************/
3541 * Enable/Disable the Transmitter and/or Receiver.
3544 static void stl_cd1400enablerxtx(stlport_t *portp, int rx, int tx)
3547 unsigned long flags;
3550 printk("stl_cd1400enablerxtx(portp=%x,rx=%d,tx=%d)\n",
3551 (int) portp, rx, tx);
3556 ccr |= CCR_TXDISABLE;
3558 ccr |= CCR_TXENABLE;
3560 ccr |= CCR_RXDISABLE;
3562 ccr |= CCR_RXENABLE;
3566 BRDENABLE(portp->brdnr, portp->pagenr);
3567 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3568 stl_cd1400ccrwait(portp);
3569 stl_cd1400setreg(portp, CCR, ccr);
3570 stl_cd1400ccrwait(portp);
3571 BRDDISABLE(portp->brdnr);
3572 restore_flags(flags);
3575 /*****************************************************************************/
3578 * Start/stop the Transmitter and/or Receiver.
3581 static void stl_cd1400startrxtx(stlport_t *portp, int rx, int tx)
3583 unsigned char sreron, sreroff;
3584 unsigned long flags;
3587 printk("stl_cd1400startrxtx(portp=%x,rx=%d,tx=%d)\n",
3588 (int) portp, rx, tx);
3594 sreroff |= (SRER_TXDATA | SRER_TXEMPTY);
3596 sreron |= SRER_TXDATA;
3598 sreron |= SRER_TXEMPTY;
3600 sreroff |= SRER_RXDATA;
3602 sreron |= SRER_RXDATA;
3606 BRDENABLE(portp->brdnr, portp->pagenr);
3607 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3608 stl_cd1400setreg(portp, SRER,
3609 ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron));
3610 BRDDISABLE(portp->brdnr);
3612 set_bit(ASYI_TXBUSY, &portp->istate);
3613 restore_flags(flags);
3616 /*****************************************************************************/
3619 * Disable all interrupts from this port.
3622 static void stl_cd1400disableintrs(stlport_t *portp)
3624 unsigned long flags;
3627 printk("stl_cd1400disableintrs(portp=%x)\n", (int) portp);
3631 BRDENABLE(portp->brdnr, portp->pagenr);
3632 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3633 stl_cd1400setreg(portp, SRER, 0);
3634 BRDDISABLE(portp->brdnr);
3635 restore_flags(flags);
3638 /*****************************************************************************/
3640 static void stl_cd1400sendbreak(stlport_t *portp, int len)
3642 unsigned long flags;
3645 printk("stl_cd1400sendbreak(portp=%x,len=%d)\n", (int) portp, len);
3650 BRDENABLE(portp->brdnr, portp->pagenr);
3651 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3652 stl_cd1400setreg(portp, SRER,
3653 ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) |
3655 BRDDISABLE(portp->brdnr);
3656 portp->brklen = len;
3658 portp->stats.txbreaks++;
3659 restore_flags(flags);
3662 /*****************************************************************************/
3665 * Take flow control actions...
3668 static void stl_cd1400flowctrl(stlport_t *portp, int state)
3670 struct tty_struct *tty;
3671 unsigned long flags;
3674 printk("stl_cd1400flowctrl(portp=%x,state=%x)\n", (int) portp, state);
3677 if (portp == (stlport_t *) NULL)
3680 if (tty == (struct tty_struct *) NULL)
3685 BRDENABLE(portp->brdnr, portp->pagenr);
3686 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3689 if (tty->termios->c_iflag & IXOFF) {
3690 stl_cd1400ccrwait(portp);
3691 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3692 portp->stats.rxxon++;
3693 stl_cd1400ccrwait(portp);
3696 * Question: should we return RTS to what it was before? It may
3697 * have been set by an ioctl... Suppose not, since if you have
3698 * hardware flow control set then it is pretty silly to go and
3699 * set the RTS line by hand.
3701 if (tty->termios->c_cflag & CRTSCTS) {
3702 stl_cd1400setreg(portp, MCOR1,
3703 (stl_cd1400getreg(portp, MCOR1) |
3704 FIFO_RTSTHRESHOLD));
3705 stl_cd1400setreg(portp, MSVR2, MSVR2_RTS);
3706 portp->stats.rxrtson++;
3709 if (tty->termios->c_iflag & IXOFF) {
3710 stl_cd1400ccrwait(portp);
3711 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3712 portp->stats.rxxoff++;
3713 stl_cd1400ccrwait(portp);
3715 if (tty->termios->c_cflag & CRTSCTS) {
3716 stl_cd1400setreg(portp, MCOR1,
3717 (stl_cd1400getreg(portp, MCOR1) & 0xf0));
3718 stl_cd1400setreg(portp, MSVR2, 0);
3719 portp->stats.rxrtsoff++;
3723 BRDDISABLE(portp->brdnr);
3724 restore_flags(flags);
3727 /*****************************************************************************/
3730 * Send a flow control character...
3733 static void stl_cd1400sendflow(stlport_t *portp, int state)
3735 struct tty_struct *tty;
3736 unsigned long flags;
3739 printk("stl_cd1400sendflow(portp=%x,state=%x)\n", (int) portp, state);
3742 if (portp == (stlport_t *) NULL)
3745 if (tty == (struct tty_struct *) NULL)
3750 BRDENABLE(portp->brdnr, portp->pagenr);
3751 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3753 stl_cd1400ccrwait(portp);
3754 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3755 portp->stats.rxxon++;
3756 stl_cd1400ccrwait(portp);
3758 stl_cd1400ccrwait(portp);
3759 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3760 portp->stats.rxxoff++;
3761 stl_cd1400ccrwait(portp);
3763 BRDDISABLE(portp->brdnr);
3764 restore_flags(flags);
3767 /*****************************************************************************/
3769 static void stl_cd1400flush(stlport_t *portp)
3771 unsigned long flags;
3774 printk("stl_cd1400flush(portp=%x)\n", (int) portp);
3777 if (portp == (stlport_t *) NULL)
3782 BRDENABLE(portp->brdnr, portp->pagenr);
3783 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3784 stl_cd1400ccrwait(portp);
3785 stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO);
3786 stl_cd1400ccrwait(portp);
3787 portp->tx.tail = portp->tx.head;
3788 BRDDISABLE(portp->brdnr);
3789 restore_flags(flags);
3792 /*****************************************************************************/
3795 * Return the current state of data flow on this port. This is only
3796 * really interresting when determining if data has fully completed
3797 * transmission or not... This is easy for the cd1400, it accurately
3798 * maintains the busy port flag.
3801 static int stl_cd1400datastate(stlport_t *portp)
3804 printk("stl_cd1400datastate(portp=%x)\n", (int) portp);
3807 if (portp == (stlport_t *) NULL)
3810 return test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0;
3813 /*****************************************************************************/
3816 * Interrupt service routine for cd1400 EasyIO boards.
3819 static void stl_cd1400eiointr(stlpanel_t *panelp, unsigned int iobase)
3821 unsigned char svrtype;
3824 printk("stl_cd1400eiointr(panelp=%x,iobase=%x)\n",
3825 (int) panelp, iobase);
3829 svrtype = inb(iobase + EREG_DATA);
3830 if (panelp->nrports > 4) {
3831 outb((SVRR + 0x80), iobase);
3832 svrtype |= inb(iobase + EREG_DATA);
3835 if (svrtype & SVRR_RX)
3836 stl_cd1400rxisr(panelp, iobase);
3837 else if (svrtype & SVRR_TX)
3838 stl_cd1400txisr(panelp, iobase);
3839 else if (svrtype & SVRR_MDM)
3840 stl_cd1400mdmisr(panelp, iobase);
3843 /*****************************************************************************/
3846 * Interrupt service routine for cd1400 panels.
3849 static void stl_cd1400echintr(stlpanel_t *panelp, unsigned int iobase)
3851 unsigned char svrtype;
3854 printk("stl_cd1400echintr(panelp=%x,iobase=%x)\n", (int) panelp,
3859 svrtype = inb(iobase + EREG_DATA);
3860 outb((SVRR + 0x80), iobase);
3861 svrtype |= inb(iobase + EREG_DATA);
3862 if (svrtype & SVRR_RX)
3863 stl_cd1400rxisr(panelp, iobase);
3864 else if (svrtype & SVRR_TX)
3865 stl_cd1400txisr(panelp, iobase);
3866 else if (svrtype & SVRR_MDM)
3867 stl_cd1400mdmisr(panelp, iobase);
3871 /*****************************************************************************/
3874 * Unfortunately we need to handle breaks in the TX data stream, since
3875 * this is the only way to generate them on the cd1400.
3878 static inline int stl_cd1400breakisr(stlport_t *portp, int ioaddr)
3880 if (portp->brklen == 1) {
3881 outb((COR2 + portp->uartaddr), ioaddr);
3882 outb((inb(ioaddr + EREG_DATA) | COR2_ETC),
3883 (ioaddr + EREG_DATA));
3884 outb((TDR + portp->uartaddr), ioaddr);
3885 outb(ETC_CMD, (ioaddr + EREG_DATA));
3886 outb(ETC_STARTBREAK, (ioaddr + EREG_DATA));
3887 outb((SRER + portp->uartaddr), ioaddr);
3888 outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)),
3889 (ioaddr + EREG_DATA));
3891 } else if (portp->brklen > 1) {
3892 outb((TDR + portp->uartaddr), ioaddr);
3893 outb(ETC_CMD, (ioaddr + EREG_DATA));
3894 outb(ETC_STOPBREAK, (ioaddr + EREG_DATA));
3898 outb((COR2 + portp->uartaddr), ioaddr);
3899 outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC),
3900 (ioaddr + EREG_DATA));
3906 /*****************************************************************************/
3909 * Transmit interrupt handler. This has gotta be fast! Handling TX
3910 * chars is pretty simple, stuff as many as possible from the TX buffer
3911 * into the cd1400 FIFO. Must also handle TX breaks here, since they
3912 * are embedded as commands in the data stream. Oh no, had to use a goto!
3913 * This could be optimized more, will do when I get time...
3914 * In practice it is possible that interrupts are enabled but that the
3915 * port has been hung up. Need to handle not having any TX buffer here,
3916 * this is done by using the side effect that head and tail will also
3917 * be NULL if the buffer has been freed.
3920 static void stl_cd1400txisr(stlpanel_t *panelp, int ioaddr)
3925 unsigned char ioack, srer;
3928 printk("stl_cd1400txisr(panelp=%x,ioaddr=%x)\n", (int) panelp, ioaddr);
3931 ioack = inb(ioaddr + EREG_TXACK);
3932 if (((ioack & panelp->ackmask) != 0) ||
3933 ((ioack & ACK_TYPMASK) != ACK_TYPTX)) {
3934 printk("STALLION: bad TX interrupt ack value=%x\n", ioack);
3937 portp = panelp->ports[(ioack >> 3)];
3940 * Unfortunately we need to handle breaks in the data stream, since
3941 * this is the only way to generate them on the cd1400. Do it now if
3942 * a break is to be sent.
3944 if (portp->brklen != 0)
3945 if (stl_cd1400breakisr(portp, ioaddr))
3948 head = portp->tx.head;
3949 tail = portp->tx.tail;
3950 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
3951 if ((len == 0) || ((len < STL_TXBUFLOW) &&
3952 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
3953 set_bit(ASYI_TXLOW, &portp->istate);
3954 schedule_work(&portp->tqueue);
3958 outb((SRER + portp->uartaddr), ioaddr);
3959 srer = inb(ioaddr + EREG_DATA);
3960 if (srer & SRER_TXDATA) {
3961 srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY;
3963 srer &= ~(SRER_TXDATA | SRER_TXEMPTY);
3964 clear_bit(ASYI_TXBUSY, &portp->istate);
3966 outb(srer, (ioaddr + EREG_DATA));
3968 len = MIN(len, CD1400_TXFIFOSIZE);
3969 portp->stats.txtotal += len;
3970 stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail));
3971 outb((TDR + portp->uartaddr), ioaddr);
3972 outsb((ioaddr + EREG_DATA), tail, stlen);
3975 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
3976 tail = portp->tx.buf;
3978 outsb((ioaddr + EREG_DATA), tail, len);
3981 portp->tx.tail = tail;
3985 outb((EOSRR + portp->uartaddr), ioaddr);
3986 outb(0, (ioaddr + EREG_DATA));
3989 /*****************************************************************************/
3992 * Receive character interrupt handler. Determine if we have good chars
3993 * or bad chars and then process appropriately. Good chars are easy
3994 * just shove the lot into the RX buffer and set all status byte to 0.
3995 * If a bad RX char then process as required. This routine needs to be
3996 * fast! In practice it is possible that we get an interrupt on a port
3997 * that is closed. This can happen on hangups - since they completely
3998 * shutdown a port not in user context. Need to handle this case.
4001 static void stl_cd1400rxisr(stlpanel_t *panelp, int ioaddr)
4004 struct tty_struct *tty;
4005 unsigned int ioack, len, buflen;
4006 unsigned char status;
4010 printk("stl_cd1400rxisr(panelp=%x,ioaddr=%x)\n", (int) panelp, ioaddr);
4013 ioack = inb(ioaddr + EREG_RXACK);
4014 if ((ioack & panelp->ackmask) != 0) {
4015 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
4018 portp = panelp->ports[(ioack >> 3)];
4021 if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) {
4022 outb((RDCR + portp->uartaddr), ioaddr);
4023 len = inb(ioaddr + EREG_DATA);
4024 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
4025 len = MIN(len, sizeof(stl_unwanted));
4026 outb((RDSR + portp->uartaddr), ioaddr);
4027 insb((ioaddr + EREG_DATA), &stl_unwanted[0], len);
4028 portp->stats.rxlost += len;
4029 portp->stats.rxtotal += len;
4031 len = MIN(len, buflen);
4034 outb((RDSR + portp->uartaddr), ioaddr);
4035 tty_prepare_flip_string(tty, &ptr, len);
4036 insb((ioaddr + EREG_DATA), ptr, len);
4037 tty_schedule_flip(tty);
4038 portp->stats.rxtotal += len;
4041 } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) {
4042 outb((RDSR + portp->uartaddr), ioaddr);
4043 status = inb(ioaddr + EREG_DATA);
4044 ch = inb(ioaddr + EREG_DATA);
4045 if (status & ST_PARITY)
4046 portp->stats.rxparity++;
4047 if (status & ST_FRAMING)
4048 portp->stats.rxframing++;
4049 if (status & ST_OVERRUN)
4050 portp->stats.rxoverrun++;
4051 if (status & ST_BREAK)
4052 portp->stats.rxbreaks++;
4053 if (status & ST_SCHARMASK) {
4054 if ((status & ST_SCHARMASK) == ST_SCHAR1)
4055 portp->stats.txxon++;
4056 if ((status & ST_SCHARMASK) == ST_SCHAR2)
4057 portp->stats.txxoff++;
4060 if (tty != NULL && (portp->rxignoremsk & status) == 0) {
4061 if (portp->rxmarkmsk & status) {
4062 if (status & ST_BREAK) {
4064 if (portp->flags & ASYNC_SAK) {
4066 BRDENABLE(portp->brdnr, portp->pagenr);
4068 } else if (status & ST_PARITY) {
4069 status = TTY_PARITY;
4070 } else if (status & ST_FRAMING) {
4072 } else if(status & ST_OVERRUN) {
4073 status = TTY_OVERRUN;
4080 tty_insert_flip_char(tty, ch, status);
4081 tty_schedule_flip(tty);
4084 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
4089 outb((EOSRR + portp->uartaddr), ioaddr);
4090 outb(0, (ioaddr + EREG_DATA));
4093 /*****************************************************************************/
4096 * Modem interrupt handler. The is called when the modem signal line
4097 * (DCD) has changed state. Leave most of the work to the off-level
4098 * processing routine.
4101 static void stl_cd1400mdmisr(stlpanel_t *panelp, int ioaddr)
4108 printk("stl_cd1400mdmisr(panelp=%x)\n", (int) panelp);
4111 ioack = inb(ioaddr + EREG_MDACK);
4112 if (((ioack & panelp->ackmask) != 0) ||
4113 ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) {
4114 printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack);
4117 portp = panelp->ports[(ioack >> 3)];
4119 outb((MISR + portp->uartaddr), ioaddr);
4120 misr = inb(ioaddr + EREG_DATA);
4121 if (misr & MISR_DCD) {
4122 set_bit(ASYI_DCDCHANGE, &portp->istate);
4123 schedule_work(&portp->tqueue);
4124 portp->stats.modem++;
4127 outb((EOSRR + portp->uartaddr), ioaddr);
4128 outb(0, (ioaddr + EREG_DATA));
4131 /*****************************************************************************/
4132 /* SC26198 HARDWARE FUNCTIONS */
4133 /*****************************************************************************/
4136 * These functions get/set/update the registers of the sc26198 UARTs.
4137 * Access to the sc26198 registers is via an address/data io port pair.
4138 * (Maybe should make this inline...)
4141 static int stl_sc26198getreg(stlport_t *portp, int regnr)
4143 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
4144 return inb(portp->ioaddr + XP_DATA);
4147 static void stl_sc26198setreg(stlport_t *portp, int regnr, int value)
4149 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
4150 outb(value, (portp->ioaddr + XP_DATA));
4153 static int stl_sc26198updatereg(stlport_t *portp, int regnr, int value)
4155 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
4156 if (inb(portp->ioaddr + XP_DATA) != value) {
4157 outb(value, (portp->ioaddr + XP_DATA));
4163 /*****************************************************************************/
4166 * Functions to get and set the sc26198 global registers.
4169 static int stl_sc26198getglobreg(stlport_t *portp, int regnr)
4171 outb(regnr, (portp->ioaddr + XP_ADDR));
4172 return inb(portp->ioaddr + XP_DATA);
4176 static void stl_sc26198setglobreg(stlport_t *portp, int regnr, int value)
4178 outb(regnr, (portp->ioaddr + XP_ADDR));
4179 outb(value, (portp->ioaddr + XP_DATA));
4183 /*****************************************************************************/
4186 * Inbitialize the UARTs in a panel. We don't care what sort of board
4187 * these ports are on - since the port io registers are almost
4188 * identical when dealing with ports.
4191 static int stl_sc26198panelinit(stlbrd_t *brdp, stlpanel_t *panelp)
4194 int nrchips, ioaddr;
4197 printk("stl_sc26198panelinit(brdp=%x,panelp=%x)\n",
4198 (int) brdp, (int) panelp);
4201 BRDENABLE(panelp->brdnr, panelp->pagenr);
4204 * Check that each chip is present and started up OK.
4207 nrchips = (panelp->nrports + 4) / SC26198_PORTS;
4208 if (brdp->brdtype == BRD_ECHPCI)
4209 outb(panelp->pagenr, brdp->ioctrl);
4211 for (i = 0; (i < nrchips); i++) {
4212 ioaddr = panelp->iobase + (i * 4);
4213 outb(SCCR, (ioaddr + XP_ADDR));
4214 outb(CR_RESETALL, (ioaddr + XP_DATA));
4215 outb(TSTR, (ioaddr + XP_ADDR));
4216 if (inb(ioaddr + XP_DATA) != 0) {
4217 printk("STALLION: sc26198 not responding, "
4218 "brd=%d panel=%d chip=%d\n",
4219 panelp->brdnr, panelp->panelnr, i);
4222 chipmask |= (0x1 << i);
4223 outb(GCCR, (ioaddr + XP_ADDR));
4224 outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA));
4225 outb(WDTRCR, (ioaddr + XP_ADDR));
4226 outb(0xff, (ioaddr + XP_DATA));
4229 BRDDISABLE(panelp->brdnr);
4233 /*****************************************************************************/
4236 * Initialize hardware specific port registers.
4239 static void stl_sc26198portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp)
4242 printk("stl_sc26198portinit(brdp=%x,panelp=%x,portp=%x)\n",
4243 (int) brdp, (int) panelp, (int) portp);
4246 if ((brdp == (stlbrd_t *) NULL) || (panelp == (stlpanel_t *) NULL) ||
4247 (portp == (stlport_t *) NULL))
4250 portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4);
4251 portp->uartaddr = (portp->portnr & 0x07) << 4;
4252 portp->pagenr = panelp->pagenr;
4255 BRDENABLE(portp->brdnr, portp->pagenr);
4256 stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS);
4257 BRDDISABLE(portp->brdnr);
4260 /*****************************************************************************/
4263 * Set up the sc26198 registers for a port based on the termios port
4267 static void stl_sc26198setport(stlport_t *portp, struct termios *tiosp)
4270 unsigned long flags;
4271 unsigned int baudrate;
4272 unsigned char mr0, mr1, mr2, clk;
4273 unsigned char imron, imroff, iopr, ipr;
4283 brdp = stl_brds[portp->brdnr];
4284 if (brdp == (stlbrd_t *) NULL)
4288 * Set up the RX char ignore mask with those RX error types we
4291 portp->rxignoremsk = 0;
4292 if (tiosp->c_iflag & IGNPAR)
4293 portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING |
4295 if (tiosp->c_iflag & IGNBRK)
4296 portp->rxignoremsk |= SR_RXBREAK;
4298 portp->rxmarkmsk = SR_RXOVERRUN;
4299 if (tiosp->c_iflag & (INPCK | PARMRK))
4300 portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING);
4301 if (tiosp->c_iflag & BRKINT)
4302 portp->rxmarkmsk |= SR_RXBREAK;
4305 * Go through the char size, parity and stop bits and set all the
4306 * option register appropriately.
4308 switch (tiosp->c_cflag & CSIZE) {
4323 if (tiosp->c_cflag & CSTOPB)
4328 if (tiosp->c_cflag & PARENB) {
4329 if (tiosp->c_cflag & PARODD)
4330 mr1 |= (MR1_PARENB | MR1_PARODD);
4332 mr1 |= (MR1_PARENB | MR1_PAREVEN);
4337 mr1 |= MR1_ERRBLOCK;
4340 * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing
4341 * space for hardware flow control and the like. This should be set to
4344 mr2 |= MR2_RXFIFOHALF;
4347 * Calculate the baud rate timers. For now we will just assume that
4348 * the input and output baud are the same. The sc26198 has a fixed
4349 * baud rate table, so only discrete baud rates possible.
4351 baudrate = tiosp->c_cflag & CBAUD;
4352 if (baudrate & CBAUDEX) {
4353 baudrate &= ~CBAUDEX;
4354 if ((baudrate < 1) || (baudrate > 4))
4355 tiosp->c_cflag &= ~CBAUDEX;
4359 baudrate = stl_baudrates[baudrate];
4360 if ((tiosp->c_cflag & CBAUD) == B38400) {
4361 if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
4363 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
4365 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
4367 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
4369 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
4370 baudrate = (portp->baud_base / portp->custom_divisor);
4372 if (baudrate > STL_SC26198MAXBAUD)
4373 baudrate = STL_SC26198MAXBAUD;
4376 for (clk = 0; (clk < SC26198_NRBAUDS); clk++) {
4377 if (baudrate <= sc26198_baudtable[clk])
4383 * Check what form of modem signaling is required and set it up.
4385 if (tiosp->c_cflag & CLOCAL) {
4386 portp->flags &= ~ASYNC_CHECK_CD;
4388 iopr |= IOPR_DCDCOS;
4390 portp->flags |= ASYNC_CHECK_CD;
4394 * Setup sc26198 enhanced modes if we can. In particular we want to
4395 * handle as much of the flow control as possible automatically. As
4396 * well as saving a few CPU cycles it will also greatly improve flow
4397 * control reliability.
4399 if (tiosp->c_iflag & IXON) {
4400 mr0 |= MR0_SWFTX | MR0_SWFT;
4401 imron |= IR_XONXOFF;
4403 imroff |= IR_XONXOFF;
4405 if (tiosp->c_iflag & IXOFF)
4408 if (tiosp->c_cflag & CRTSCTS) {
4414 * All sc26198 register values calculated so go through and set
4419 printk("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
4420 portp->portnr, portp->panelnr, portp->brdnr);
4421 printk(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk);
4422 printk(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff);
4423 printk(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
4424 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
4425 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
4430 BRDENABLE(portp->brdnr, portp->pagenr);
4431 stl_sc26198setreg(portp, IMR, 0);
4432 stl_sc26198updatereg(portp, MR0, mr0);
4433 stl_sc26198updatereg(portp, MR1, mr1);
4434 stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK);
4435 stl_sc26198updatereg(portp, MR2, mr2);
4436 stl_sc26198updatereg(portp, IOPIOR,
4437 ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr));
4440 stl_sc26198setreg(portp, TXCSR, clk);
4441 stl_sc26198setreg(portp, RXCSR, clk);
4444 stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]);
4445 stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]);
4447 ipr = stl_sc26198getreg(portp, IPR);
4449 portp->sigs &= ~TIOCM_CD;
4451 portp->sigs |= TIOCM_CD;
4453 portp->imr = (portp->imr & ~imroff) | imron;
4454 stl_sc26198setreg(portp, IMR, portp->imr);
4455 BRDDISABLE(portp->brdnr);
4456 restore_flags(flags);
4459 /*****************************************************************************/
4462 * Set the state of the DTR and RTS signals.
4465 static void stl_sc26198setsignals(stlport_t *portp, int dtr, int rts)
4467 unsigned char iopioron, iopioroff;
4468 unsigned long flags;
4471 printk("stl_sc26198setsignals(portp=%x,dtr=%d,rts=%d)\n",
4472 (int) portp, dtr, rts);
4478 iopioroff |= IPR_DTR;
4480 iopioron |= IPR_DTR;
4482 iopioroff |= IPR_RTS;
4484 iopioron |= IPR_RTS;
4488 BRDENABLE(portp->brdnr, portp->pagenr);
4489 stl_sc26198setreg(portp, IOPIOR,
4490 ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron));
4491 BRDDISABLE(portp->brdnr);
4492 restore_flags(flags);
4495 /*****************************************************************************/
4498 * Return the state of the signals.
4501 static int stl_sc26198getsignals(stlport_t *portp)
4504 unsigned long flags;
4508 printk("stl_sc26198getsignals(portp=%x)\n", (int) portp);
4513 BRDENABLE(portp->brdnr, portp->pagenr);
4514 ipr = stl_sc26198getreg(portp, IPR);
4515 BRDDISABLE(portp->brdnr);
4516 restore_flags(flags);
4519 sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD;
4520 sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS;
4521 sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR;
4522 sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS;
4527 /*****************************************************************************/
4530 * Enable/Disable the Transmitter and/or Receiver.
4533 static void stl_sc26198enablerxtx(stlport_t *portp, int rx, int tx)
4536 unsigned long flags;
4539 printk("stl_sc26198enablerxtx(portp=%x,rx=%d,tx=%d)\n",
4540 (int) portp, rx, tx);
4543 ccr = portp->crenable;
4545 ccr &= ~CR_TXENABLE;
4549 ccr &= ~CR_RXENABLE;
4555 BRDENABLE(portp->brdnr, portp->pagenr);
4556 stl_sc26198setreg(portp, SCCR, ccr);
4557 BRDDISABLE(portp->brdnr);
4558 portp->crenable = ccr;
4559 restore_flags(flags);
4562 /*****************************************************************************/
4565 * Start/stop the Transmitter and/or Receiver.
4568 static void stl_sc26198startrxtx(stlport_t *portp, int rx, int tx)
4571 unsigned long flags;
4574 printk("stl_sc26198startrxtx(portp=%x,rx=%d,tx=%d)\n",
4575 (int) portp, rx, tx);
4584 imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG);
4586 imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG;
4590 BRDENABLE(portp->brdnr, portp->pagenr);
4591 stl_sc26198setreg(portp, IMR, imr);
4592 BRDDISABLE(portp->brdnr);
4595 set_bit(ASYI_TXBUSY, &portp->istate);
4596 restore_flags(flags);
4599 /*****************************************************************************/
4602 * Disable all interrupts from this port.
4605 static void stl_sc26198disableintrs(stlport_t *portp)
4607 unsigned long flags;
4610 printk("stl_sc26198disableintrs(portp=%x)\n", (int) portp);
4615 BRDENABLE(portp->brdnr, portp->pagenr);
4617 stl_sc26198setreg(portp, IMR, 0);
4618 BRDDISABLE(portp->brdnr);
4619 restore_flags(flags);
4622 /*****************************************************************************/
4624 static void stl_sc26198sendbreak(stlport_t *portp, int len)
4626 unsigned long flags;
4629 printk("stl_sc26198sendbreak(portp=%x,len=%d)\n", (int) portp, len);
4634 BRDENABLE(portp->brdnr, portp->pagenr);
4636 stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK);
4637 portp->stats.txbreaks++;
4639 stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK);
4641 BRDDISABLE(portp->brdnr);
4642 restore_flags(flags);
4645 /*****************************************************************************/
4648 * Take flow control actions...
4651 static void stl_sc26198flowctrl(stlport_t *portp, int state)
4653 struct tty_struct *tty;
4654 unsigned long flags;
4658 printk("stl_sc26198flowctrl(portp=%x,state=%x)\n", (int) portp, state);
4661 if (portp == (stlport_t *) NULL)
4664 if (tty == (struct tty_struct *) NULL)
4669 BRDENABLE(portp->brdnr, portp->pagenr);
4672 if (tty->termios->c_iflag & IXOFF) {
4673 mr0 = stl_sc26198getreg(portp, MR0);
4674 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4675 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4677 portp->stats.rxxon++;
4678 stl_sc26198wait(portp);
4679 stl_sc26198setreg(portp, MR0, mr0);
4682 * Question: should we return RTS to what it was before? It may
4683 * have been set by an ioctl... Suppose not, since if you have
4684 * hardware flow control set then it is pretty silly to go and
4685 * set the RTS line by hand.
4687 if (tty->termios->c_cflag & CRTSCTS) {
4688 stl_sc26198setreg(portp, MR1,
4689 (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS));
4690 stl_sc26198setreg(portp, IOPIOR,
4691 (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS));
4692 portp->stats.rxrtson++;
4695 if (tty->termios->c_iflag & IXOFF) {
4696 mr0 = stl_sc26198getreg(portp, MR0);
4697 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4698 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4700 portp->stats.rxxoff++;
4701 stl_sc26198wait(portp);
4702 stl_sc26198setreg(portp, MR0, mr0);
4704 if (tty->termios->c_cflag & CRTSCTS) {
4705 stl_sc26198setreg(portp, MR1,
4706 (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS));
4707 stl_sc26198setreg(portp, IOPIOR,
4708 (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS));
4709 portp->stats.rxrtsoff++;
4713 BRDDISABLE(portp->brdnr);
4714 restore_flags(flags);
4717 /*****************************************************************************/
4720 * Send a flow control character.
4723 static void stl_sc26198sendflow(stlport_t *portp, int state)
4725 struct tty_struct *tty;
4726 unsigned long flags;
4730 printk("stl_sc26198sendflow(portp=%x,state=%x)\n", (int) portp, state);
4733 if (portp == (stlport_t *) NULL)
4736 if (tty == (struct tty_struct *) NULL)
4741 BRDENABLE(portp->brdnr, portp->pagenr);
4743 mr0 = stl_sc26198getreg(portp, MR0);
4744 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4745 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4747 portp->stats.rxxon++;
4748 stl_sc26198wait(portp);
4749 stl_sc26198setreg(portp, MR0, mr0);
4751 mr0 = stl_sc26198getreg(portp, MR0);
4752 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4753 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4755 portp->stats.rxxoff++;
4756 stl_sc26198wait(portp);
4757 stl_sc26198setreg(portp, MR0, mr0);
4759 BRDDISABLE(portp->brdnr);
4760 restore_flags(flags);
4763 /*****************************************************************************/
4765 static void stl_sc26198flush(stlport_t *portp)
4767 unsigned long flags;
4770 printk("stl_sc26198flush(portp=%x)\n", (int) portp);
4773 if (portp == (stlport_t *) NULL)
4778 BRDENABLE(portp->brdnr, portp->pagenr);
4779 stl_sc26198setreg(portp, SCCR, CR_TXRESET);
4780 stl_sc26198setreg(portp, SCCR, portp->crenable);
4781 BRDDISABLE(portp->brdnr);
4782 portp->tx.tail = portp->tx.head;
4783 restore_flags(flags);
4786 /*****************************************************************************/
4789 * Return the current state of data flow on this port. This is only
4790 * really interresting when determining if data has fully completed
4791 * transmission or not... The sc26198 interrupt scheme cannot
4792 * determine when all data has actually drained, so we need to
4793 * check the port statusy register to be sure.
4796 static int stl_sc26198datastate(stlport_t *portp)
4798 unsigned long flags;
4802 printk("stl_sc26198datastate(portp=%x)\n", (int) portp);
4805 if (portp == (stlport_t *) NULL)
4807 if (test_bit(ASYI_TXBUSY, &portp->istate))
4812 BRDENABLE(portp->brdnr, portp->pagenr);
4813 sr = stl_sc26198getreg(portp, SR);
4814 BRDDISABLE(portp->brdnr);
4815 restore_flags(flags);
4817 return (sr & SR_TXEMPTY) ? 0 : 1;
4820 /*****************************************************************************/
4823 * Delay for a small amount of time, to give the sc26198 a chance
4824 * to process a command...
4827 static void stl_sc26198wait(stlport_t *portp)
4832 printk("stl_sc26198wait(portp=%x)\n", (int) portp);
4835 if (portp == (stlport_t *) NULL)
4838 for (i = 0; (i < 20); i++)
4839 stl_sc26198getglobreg(portp, TSTR);
4842 /*****************************************************************************/
4845 * If we are TX flow controlled and in IXANY mode then we may
4846 * need to unflow control here. We gotta do this because of the
4847 * automatic flow control modes of the sc26198.
4850 static inline void stl_sc26198txunflow(stlport_t *portp, struct tty_struct *tty)
4854 mr0 = stl_sc26198getreg(portp, MR0);
4855 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4856 stl_sc26198setreg(portp, SCCR, CR_HOSTXON);
4857 stl_sc26198wait(portp);
4858 stl_sc26198setreg(portp, MR0, mr0);
4859 clear_bit(ASYI_TXFLOWED, &portp->istate);
4862 /*****************************************************************************/
4865 * Interrupt service routine for sc26198 panels.
4868 static void stl_sc26198intr(stlpanel_t *panelp, unsigned int iobase)
4874 * Work around bug in sc26198 chip... Cannot have A6 address
4875 * line of UART high, else iack will be returned as 0.
4877 outb(0, (iobase + 1));
4879 iack = inb(iobase + XP_IACK);
4880 portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)];
4882 if (iack & IVR_RXDATA)
4883 stl_sc26198rxisr(portp, iack);
4884 else if (iack & IVR_TXDATA)
4885 stl_sc26198txisr(portp);
4887 stl_sc26198otherisr(portp, iack);
4890 /*****************************************************************************/
4893 * Transmit interrupt handler. This has gotta be fast! Handling TX
4894 * chars is pretty simple, stuff as many as possible from the TX buffer
4895 * into the sc26198 FIFO.
4896 * In practice it is possible that interrupts are enabled but that the
4897 * port has been hung up. Need to handle not having any TX buffer here,
4898 * this is done by using the side effect that head and tail will also
4899 * be NULL if the buffer has been freed.
4902 static void stl_sc26198txisr(stlport_t *portp)
4904 unsigned int ioaddr;
4910 printk("stl_sc26198txisr(portp=%x)\n", (int) portp);
4913 ioaddr = portp->ioaddr;
4914 head = portp->tx.head;
4915 tail = portp->tx.tail;
4916 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
4917 if ((len == 0) || ((len < STL_TXBUFLOW) &&
4918 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
4919 set_bit(ASYI_TXLOW, &portp->istate);
4920 schedule_work(&portp->tqueue);
4924 outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR));
4925 mr0 = inb(ioaddr + XP_DATA);
4926 if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) {
4927 portp->imr &= ~IR_TXRDY;
4928 outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR));
4929 outb(portp->imr, (ioaddr + XP_DATA));
4930 clear_bit(ASYI_TXBUSY, &portp->istate);
4932 mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY);
4933 outb(mr0, (ioaddr + XP_DATA));
4936 len = MIN(len, SC26198_TXFIFOSIZE);
4937 portp->stats.txtotal += len;
4938 stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail));
4939 outb(GTXFIFO, (ioaddr + XP_ADDR));
4940 outsb((ioaddr + XP_DATA), tail, stlen);
4943 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
4944 tail = portp->tx.buf;
4946 outsb((ioaddr + XP_DATA), tail, len);
4949 portp->tx.tail = tail;
4953 /*****************************************************************************/
4956 * Receive character interrupt handler. Determine if we have good chars
4957 * or bad chars and then process appropriately. Good chars are easy
4958 * just shove the lot into the RX buffer and set all status byte to 0.
4959 * If a bad RX char then process as required. This routine needs to be
4960 * fast! In practice it is possible that we get an interrupt on a port
4961 * that is closed. This can happen on hangups - since they completely
4962 * shutdown a port not in user context. Need to handle this case.
4965 static void stl_sc26198rxisr(stlport_t *portp, unsigned int iack)
4967 struct tty_struct *tty;
4968 unsigned int len, buflen, ioaddr;
4971 printk("stl_sc26198rxisr(portp=%x,iack=%x)\n", (int) portp, iack);
4975 ioaddr = portp->ioaddr;
4976 outb(GIBCR, (ioaddr + XP_ADDR));
4977 len = inb(ioaddr + XP_DATA) + 1;
4979 if ((iack & IVR_TYPEMASK) == IVR_RXDATA) {
4980 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
4981 len = MIN(len, sizeof(stl_unwanted));
4982 outb(GRXFIFO, (ioaddr + XP_ADDR));
4983 insb((ioaddr + XP_DATA), &stl_unwanted[0], len);
4984 portp->stats.rxlost += len;
4985 portp->stats.rxtotal += len;
4987 len = MIN(len, buflen);
4990 outb(GRXFIFO, (ioaddr + XP_ADDR));
4991 tty_prepare_flip_string(tty, &ptr, len);
4992 insb((ioaddr + XP_DATA), ptr, len);
4993 tty_schedule_flip(tty);
4994 portp->stats.rxtotal += len;
4998 stl_sc26198rxbadchars(portp);
5002 * If we are TX flow controlled and in IXANY mode then we may need
5003 * to unflow control here. We gotta do this because of the automatic
5004 * flow control modes of the sc26198.
5006 if (test_bit(ASYI_TXFLOWED, &portp->istate)) {
5007 if ((tty != (struct tty_struct *) NULL) &&
5008 (tty->termios != (struct termios *) NULL) &&
5009 (tty->termios->c_iflag & IXANY)) {
5010 stl_sc26198txunflow(portp, tty);
5015 /*****************************************************************************/
5018 * Process an RX bad character.
5021 static inline void stl_sc26198rxbadch(stlport_t *portp, unsigned char status, char ch)
5023 struct tty_struct *tty;
5024 unsigned int ioaddr;
5027 ioaddr = portp->ioaddr;
5029 if (status & SR_RXPARITY)
5030 portp->stats.rxparity++;
5031 if (status & SR_RXFRAMING)
5032 portp->stats.rxframing++;
5033 if (status & SR_RXOVERRUN)
5034 portp->stats.rxoverrun++;
5035 if (status & SR_RXBREAK)
5036 portp->stats.rxbreaks++;
5038 if ((tty != (struct tty_struct *) NULL) &&
5039 ((portp->rxignoremsk & status) == 0)) {
5040 if (portp->rxmarkmsk & status) {
5041 if (status & SR_RXBREAK) {
5043 if (portp->flags & ASYNC_SAK) {
5045 BRDENABLE(portp->brdnr, portp->pagenr);
5047 } else if (status & SR_RXPARITY) {
5048 status = TTY_PARITY;
5049 } else if (status & SR_RXFRAMING) {
5051 } else if(status & SR_RXOVERRUN) {
5052 status = TTY_OVERRUN;
5060 tty_insert_flip_char(tty, ch, status);
5061 tty_schedule_flip(tty);
5064 portp->stats.rxtotal++;
5068 /*****************************************************************************/
5071 * Process all characters in the RX FIFO of the UART. Check all char
5072 * status bytes as well, and process as required. We need to check
5073 * all bytes in the FIFO, in case some more enter the FIFO while we
5074 * are here. To get the exact character error type we need to switch
5075 * into CHAR error mode (that is why we need to make sure we empty
5079 static void stl_sc26198rxbadchars(stlport_t *portp)
5081 unsigned char status, mr1;
5085 * To get the precise error type for each character we must switch
5086 * back into CHAR error mode.
5088 mr1 = stl_sc26198getreg(portp, MR1);
5089 stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK));
5091 while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) {
5092 stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR);
5093 ch = stl_sc26198getreg(portp, RXFIFO);
5094 stl_sc26198rxbadch(portp, status, ch);
5098 * To get correct interrupt class we must switch back into BLOCK
5101 stl_sc26198setreg(portp, MR1, mr1);
5104 /*****************************************************************************/
5107 * Other interrupt handler. This includes modem signals, flow
5108 * control actions, etc. Most stuff is left to off-level interrupt
5112 static void stl_sc26198otherisr(stlport_t *portp, unsigned int iack)
5114 unsigned char cir, ipr, xisr;
5117 printk("stl_sc26198otherisr(portp=%x,iack=%x)\n", (int) portp, iack);
5120 cir = stl_sc26198getglobreg(portp, CIR);
5122 switch (cir & CIR_SUBTYPEMASK) {
5124 ipr = stl_sc26198getreg(portp, IPR);
5125 if (ipr & IPR_DCDCHANGE) {
5126 set_bit(ASYI_DCDCHANGE, &portp->istate);
5127 schedule_work(&portp->tqueue);
5128 portp->stats.modem++;
5131 case CIR_SUBXONXOFF:
5132 xisr = stl_sc26198getreg(portp, XISR);
5133 if (xisr & XISR_RXXONGOT) {
5134 set_bit(ASYI_TXFLOWED, &portp->istate);
5135 portp->stats.txxoff++;
5137 if (xisr & XISR_RXXOFFGOT) {
5138 clear_bit(ASYI_TXFLOWED, &portp->istate);
5139 portp->stats.txxon++;
5143 stl_sc26198setreg(portp, SCCR, CR_BREAKRESET);
5144 stl_sc26198rxbadchars(portp);
5151 /*****************************************************************************/