1 /*****************************************************************************/
4 * stallion.c -- stallion multiport serial driver.
6 * Copyright (C) 1996-1999 Stallion Technologies (support@stallion.oz.au).
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/version.h> /* for linux/stallion.h */
32 #include <linux/malloc.h>
33 #include <linux/interrupt.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>
46 #include <asm/uaccess.h>
49 #include <linux/pci.h>
52 /*****************************************************************************/
55 * Define different board types. Use the standard Stallion "assigned"
56 * board numbers. Boards supported in this driver are abbreviated as
57 * EIO = EasyIO and ECH = EasyConnection 8/32.
63 #define BRD_ECH64PCI 27
64 #define BRD_EASYIOPCI 28
67 * Define a configuration structure to hold the board configuration.
68 * Need to set this up in the code (for now) with the boards that are
69 * to be configured into the system. This is what needs to be modified
70 * when adding/removing/modifying boards. Each line entry in the
71 * stl_brdconf[] array is a board. Each line contains io/irq/memory
72 * ranges for that board (as well as what type of board it is).
74 * { BRD_EASYIO, 0x2a0, 0, 0, 10, 0 },
75 * This line would configure an EasyIO board (4 or 8, no difference),
76 * at io address 2a0 and irq 10.
78 * { BRD_ECH, 0x2a8, 0x280, 0, 12, 0 },
79 * This line will configure an EasyConnection 8/32 board at primary io
80 * address 2a8, secondary io address 280 and irq 12.
81 * Enter as many lines into this array as you want (only the first 4
82 * will actually be used!). Any combination of EasyIO and EasyConnection
83 * boards can be specified. EasyConnection 8/32 boards can share their
84 * secondary io addresses between each other.
86 * NOTE: there is no need to put any entries in this table for PCI
87 * boards. They will be found automatically by the driver - provided
88 * PCI BIOS32 support is compiled into the kernel.
95 unsigned long memaddr
;
100 static stlconf_t stl_brdconf
[] = {
101 /*{ BRD_EASYIO, 0x2a0, 0, 0, 10, 0 },*/
104 static int stl_nrbrds
= sizeof(stl_brdconf
) / sizeof(stlconf_t
);
106 /*****************************************************************************/
109 * Define some important driver characteristics. Device major numbers
110 * allocated as per Linux Device Registry.
112 #ifndef STL_SIOMEMMAJOR
113 #define STL_SIOMEMMAJOR 28
115 #ifndef STL_SERIALMAJOR
116 #define STL_SERIALMAJOR 24
118 #ifndef STL_CALLOUTMAJOR
119 #define STL_CALLOUTMAJOR 25
122 #define STL_DRVTYPSERIAL 1
123 #define STL_DRVTYPCALLOUT 2
126 * Set the TX buffer size. Bigger is better, but we don't want
127 * to chew too much memory with buffers!
129 #define STL_TXBUFLOW 512
130 #define STL_TXBUFSIZE 4096
132 /*****************************************************************************/
135 * Define our local driver identity first. Set up stuff to deal with
136 * all the local structures required by a serial tty driver.
138 static char *stl_drvtitle
= "Stallion Multiport Serial Driver";
139 static char *stl_drvname
= "stallion";
140 static char *stl_drvversion
= "5.6.0";
141 static char *stl_serialname
= "ttyE";
142 static char *stl_calloutname
= "cue";
144 static struct tty_driver stl_serial
;
145 static struct tty_driver stl_callout
;
146 static struct tty_struct
*stl_ttys
[STL_MAXDEVS
];
147 static struct termios
*stl_termios
[STL_MAXDEVS
];
148 static struct termios
*stl_termioslocked
[STL_MAXDEVS
];
149 static int stl_refcount
= 0;
152 * We will need to allocate a temporary write buffer for chars that
153 * come direct from user space. The problem is that a copy from user
154 * space might cause a page fault (typically on a system that is
155 * swapping!). All ports will share one buffer - since if the system
156 * is already swapping a shared buffer won't make things any worse.
158 static char *stl_tmpwritebuf
;
159 static DECLARE_MUTEX(stl_tmpwritesem
);
162 * Define a local default termios struct. All ports will be created
163 * with this termios initially. Basically all it defines is a raw port
164 * at 9600, 8 data bits, 1 stop bit.
166 static struct termios stl_deftermios
= {
169 (B9600
| CS8
| CREAD
| HUPCL
| CLOCAL
),
176 * Define global stats structures. Not used often, and can be
177 * re-used for each stats call.
179 static comstats_t stl_comstats
;
180 static combrd_t stl_brdstats
;
181 static stlbrd_t stl_dummybrd
;
182 static stlport_t stl_dummyport
;
185 * Define global place to put buffer overflow characters.
187 static char stl_unwanted
[SC26198_RXFIFOSIZE
];
190 * Keep track of what interrupts we have requested for us.
191 * We don't need to request an interrupt twice if it is being
192 * shared with another Stallion board.
194 static int stl_gotintrs
[STL_MAXBRDS
];
195 static int stl_numintrs
= 0;
197 /*****************************************************************************/
199 static stlbrd_t
*stl_brds
[STL_MAXBRDS
];
202 * Per board state flags. Used with the state field of the board struct.
203 * Not really much here!
205 #define BRD_FOUND 0x1
208 * Define the port structure istate flags. These set of flags are
209 * modified at interrupt time - so setting and reseting them needs
210 * to be atomic. Use the bit clear/setting routines for this.
212 #define ASYI_TXBUSY 1
214 #define ASYI_DCDCHANGE 3
215 #define ASYI_TXFLOWED 4
218 * Define an array of board names as printable strings. Handy for
219 * referencing boards when printing trace and stuff.
221 static char *stl_brdnames
[] = {
253 /*****************************************************************************/
257 * Define some string labels for arguments passed from the module
258 * load line. These allow for easy board definitions, and easy
259 * modification of the io, memory and irq resoucres.
262 static char *board0
[4];
263 static char *board1
[4];
264 static char *board2
[4];
265 static char *board3
[4];
267 static char **stl_brdsp
[] = {
275 * Define a set of common board names, and types. This is used to
276 * parse any module arguments.
279 typedef struct stlbrdtype
{
284 static stlbrdtype_t stl_brdstr
[] = {
285 { "easyio", BRD_EASYIO
},
286 { "eio", BRD_EASYIO
},
287 { "20", BRD_EASYIO
},
288 { "ec8/32", BRD_ECH
},
289 { "ec8/32-at", BRD_ECH
},
290 { "ec8/32-isa", BRD_ECH
},
292 { "echat", BRD_ECH
},
294 { "ec8/32-mc", BRD_ECHMC
},
295 { "ec8/32-mca", BRD_ECHMC
},
296 { "echmc", BRD_ECHMC
},
297 { "echmca", BRD_ECHMC
},
299 { "ec8/32-pc", BRD_ECHPCI
},
300 { "ec8/32-pci", BRD_ECHPCI
},
301 { "26", BRD_ECHPCI
},
302 { "ec8/64-pc", BRD_ECH64PCI
},
303 { "ec8/64-pci", BRD_ECH64PCI
},
304 { "ech-pci", BRD_ECH64PCI
},
305 { "echpci", BRD_ECH64PCI
},
306 { "echpc", BRD_ECH64PCI
},
307 { "27", BRD_ECH64PCI
},
308 { "easyio-pc", BRD_EASYIOPCI
},
309 { "easyio-pci", BRD_EASYIOPCI
},
310 { "eio-pci", BRD_EASYIOPCI
},
311 { "eiopci", BRD_EASYIOPCI
},
312 { "28", BRD_EASYIOPCI
},
316 * Define the module agruments.
318 MODULE_AUTHOR("Greg Ungerer");
319 MODULE_DESCRIPTION("Stallion Multiport Serial Driver");
321 MODULE_PARM(board0
, "1-4s");
322 MODULE_PARM_DESC(board0
, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]");
323 MODULE_PARM(board1
, "1-4s");
324 MODULE_PARM_DESC(board1
, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]");
325 MODULE_PARM(board2
, "1-4s");
326 MODULE_PARM_DESC(board2
, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]");
327 MODULE_PARM(board3
, "1-4s");
328 MODULE_PARM_DESC(board3
, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]");
332 /*****************************************************************************/
335 * Hardware ID bits for the EasyIO and ECH boards. These defines apply
336 * to the directly accessible io ports of these boards (not the uarts -
337 * they are in cd1400.h and sc26198.h).
339 #define EIO_8PORTRS 0x04
340 #define EIO_4PORTRS 0x05
341 #define EIO_8PORTDI 0x00
342 #define EIO_8PORTM 0x06
344 #define EIO_IDBITMASK 0x07
346 #define EIO_BRDMASK 0xf0
349 #define ID_BRD16 0x30
351 #define EIO_INTRPEND 0x08
352 #define EIO_INTEDGE 0x00
353 #define EIO_INTLEVEL 0x08
357 #define ECH_IDBITMASK 0xe0
358 #define ECH_BRDENABLE 0x08
359 #define ECH_BRDDISABLE 0x00
360 #define ECH_INTENABLE 0x01
361 #define ECH_INTDISABLE 0x00
362 #define ECH_INTLEVEL 0x02
363 #define ECH_INTEDGE 0x00
364 #define ECH_INTRPEND 0x01
365 #define ECH_BRDRESET 0x01
367 #define ECHMC_INTENABLE 0x01
368 #define ECHMC_BRDRESET 0x02
370 #define ECH_PNLSTATUS 2
371 #define ECH_PNL16PORT 0x20
372 #define ECH_PNLIDMASK 0x07
373 #define ECH_PNLXPID 0x40
374 #define ECH_PNLINTRPEND 0x80
376 #define ECH_ADDR2MASK 0x1e0
379 * Define the vector mapping bits for the programmable interrupt board
380 * hardware. These bits encode the interrupt for the board to use - it
381 * is software selectable (except the EIO-8M).
383 static unsigned char stl_vecmap
[] = {
384 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07,
385 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03
389 * Set up enable and disable macros for the ECH boards. They require
390 * the secondary io address space to be activated and deactivated.
391 * This way all ECH boards can share their secondary io region.
392 * If this is an ECH-PCI board then also need to set the page pointer
393 * to point to the correct page.
395 #define BRDENABLE(brdnr,pagenr) \
396 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
397 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \
398 stl_brds[(brdnr)]->ioctrl); \
399 else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \
400 outb((pagenr), stl_brds[(brdnr)]->ioctrl);
402 #define BRDDISABLE(brdnr) \
403 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
404 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \
405 stl_brds[(brdnr)]->ioctrl);
407 #define STL_CD1400MAXBAUD 230400
408 #define STL_SC26198MAXBAUD 460800
410 #define STL_BAUDBASE 115200
411 #define STL_CLOSEDELAY (5 * HZ / 10)
413 /*****************************************************************************/
418 * Define the Stallion PCI vendor and device IDs.
420 #ifndef PCI_VENDOR_ID_STALLION
421 #define PCI_VENDOR_ID_STALLION 0x124d
423 #ifndef PCI_DEVICE_ID_ECHPCI832
424 #define PCI_DEVICE_ID_ECHPCI832 0x0000
426 #ifndef PCI_DEVICE_ID_ECHPCI864
427 #define PCI_DEVICE_ID_ECHPCI864 0x0002
429 #ifndef PCI_DEVICE_ID_EIOPCI
430 #define PCI_DEVICE_ID_EIOPCI 0x0003
434 * Define structure to hold all Stallion PCI boards.
436 typedef struct stlpcibrd
{
437 unsigned short vendid
;
438 unsigned short devid
;
442 static stlpcibrd_t stl_pcibrds
[] = {
443 { PCI_VENDOR_ID_STALLION
, PCI_DEVICE_ID_ECHPCI864
, BRD_ECH64PCI
},
444 { PCI_VENDOR_ID_STALLION
, PCI_DEVICE_ID_EIOPCI
, BRD_EASYIOPCI
},
445 { PCI_VENDOR_ID_STALLION
, PCI_DEVICE_ID_ECHPCI832
, BRD_ECHPCI
},
446 { PCI_VENDOR_ID_NS
, PCI_DEVICE_ID_NS_87410
, BRD_ECHPCI
},
449 static int stl_nrpcibrds
= sizeof(stl_pcibrds
) / sizeof(stlpcibrd_t
);
453 /*****************************************************************************/
456 * Define macros to extract a brd/port number from a minor number.
458 #define MINOR2BRD(min) (((min) & 0xc0) >> 6)
459 #define MINOR2PORT(min) ((min) & 0x3f)
462 * Define a baud rate table that converts termios baud rate selector
463 * into the actual baud rate value. All baud rate calculations are
464 * based on the actual baud rate required.
466 static unsigned int stl_baudrates
[] = {
467 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
468 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
472 * Define some handy local macros...
475 #define MIN(a,b) (((a) <= (b)) ? (a) : (b))
478 #define TOLOWER(x) ((((x) >= 'A') && ((x) <= 'Z')) ? ((x) + 0x20) : (x))
480 /*****************************************************************************/
483 * Declare all those functions in this driver!
487 int init_module(void);
488 void cleanup_module(void);
489 static void stl_argbrds(void);
490 static int stl_parsebrd(stlconf_t
*confp
, char **argp
);
492 static unsigned long stl_atol(char *str
);
496 static int stl_open(struct tty_struct
*tty
, struct file
*filp
);
497 static void stl_close(struct tty_struct
*tty
, struct file
*filp
);
498 static int stl_write(struct tty_struct
*tty
, int from_user
, const unsigned char *buf
, int count
);
499 static void stl_putchar(struct tty_struct
*tty
, unsigned char ch
);
500 static void stl_flushchars(struct tty_struct
*tty
);
501 static int stl_writeroom(struct tty_struct
*tty
);
502 static int stl_charsinbuffer(struct tty_struct
*tty
);
503 static int stl_ioctl(struct tty_struct
*tty
, struct file
*file
, unsigned int cmd
, unsigned long arg
);
504 static void stl_settermios(struct tty_struct
*tty
, struct termios
*old
);
505 static void stl_throttle(struct tty_struct
*tty
);
506 static void stl_unthrottle(struct tty_struct
*tty
);
507 static void stl_stop(struct tty_struct
*tty
);
508 static void stl_start(struct tty_struct
*tty
);
509 static void stl_flushbuffer(struct tty_struct
*tty
);
510 static void stl_breakctl(struct tty_struct
*tty
, int state
);
511 static void stl_waituntilsent(struct tty_struct
*tty
, int timeout
);
512 static void stl_sendxchar(struct tty_struct
*tty
, char ch
);
513 static void stl_hangup(struct tty_struct
*tty
);
514 static int stl_memioctl(struct inode
*ip
, struct file
*fp
, unsigned int cmd
, unsigned long arg
);
515 static int stl_portinfo(stlport_t
*portp
, int portnr
, char *pos
);
516 static int stl_readproc(char *page
, char **start
, off_t off
, int count
, int *eof
, void *data
);
518 static int stl_brdinit(stlbrd_t
*brdp
);
519 static int stl_initports(stlbrd_t
*brdp
, stlpanel_t
*panelp
);
520 static int stl_mapirq(int irq
, char *name
);
521 static void stl_getserial(stlport_t
*portp
, struct serial_struct
*sp
);
522 static int stl_setserial(stlport_t
*portp
, struct serial_struct
*sp
);
523 static int stl_getbrdstats(combrd_t
*bp
);
524 static int stl_getportstats(stlport_t
*portp
, comstats_t
*cp
);
525 static int stl_clrportstats(stlport_t
*portp
, comstats_t
*cp
);
526 static int stl_getportstruct(unsigned long arg
);
527 static int stl_getbrdstruct(unsigned long arg
);
528 static int stl_waitcarrier(stlport_t
*portp
, struct file
*filp
);
529 static void stl_delay(int len
);
530 static void stl_intr(int irq
, void *dev_id
, struct pt_regs
*regs
);
531 static void stl_eiointr(stlbrd_t
*brdp
);
532 static void stl_echatintr(stlbrd_t
*brdp
);
533 static void stl_echmcaintr(stlbrd_t
*brdp
);
534 static void stl_echpciintr(stlbrd_t
*brdp
);
535 static void stl_echpci64intr(stlbrd_t
*brdp
);
536 static void stl_offintr(void *private);
537 static void *stl_memalloc(int len
);
538 static stlbrd_t
*stl_allocbrd(void);
539 static stlport_t
*stl_getport(int brdnr
, int panelnr
, int portnr
);
541 static inline int stl_initbrds(void);
542 static inline int stl_initeio(stlbrd_t
*brdp
);
543 static inline int stl_initech(stlbrd_t
*brdp
);
544 static inline int stl_getbrdnr(void);
547 static inline int stl_findpcibrds(void);
548 static inline int stl_initpcibrd(int brdtype
, struct pci_dev
*devp
);
552 * CD1400 uart specific handling functions.
554 static void stl_cd1400setreg(stlport_t
*portp
, int regnr
, int value
);
555 static int stl_cd1400getreg(stlport_t
*portp
, int regnr
);
556 static int stl_cd1400updatereg(stlport_t
*portp
, int regnr
, int value
);
557 static int stl_cd1400panelinit(stlbrd_t
*brdp
, stlpanel_t
*panelp
);
558 static void stl_cd1400portinit(stlbrd_t
*brdp
, stlpanel_t
*panelp
, stlport_t
*portp
);
559 static void stl_cd1400setport(stlport_t
*portp
, struct termios
*tiosp
);
560 static int stl_cd1400getsignals(stlport_t
*portp
);
561 static void stl_cd1400setsignals(stlport_t
*portp
, int dtr
, int rts
);
562 static void stl_cd1400ccrwait(stlport_t
*portp
);
563 static void stl_cd1400enablerxtx(stlport_t
*portp
, int rx
, int tx
);
564 static void stl_cd1400startrxtx(stlport_t
*portp
, int rx
, int tx
);
565 static void stl_cd1400disableintrs(stlport_t
*portp
);
566 static void stl_cd1400sendbreak(stlport_t
*portp
, int len
);
567 static void stl_cd1400flowctrl(stlport_t
*portp
, int state
);
568 static void stl_cd1400sendflow(stlport_t
*portp
, int state
);
569 static void stl_cd1400flush(stlport_t
*portp
);
570 static int stl_cd1400datastate(stlport_t
*portp
);
571 static void stl_cd1400eiointr(stlpanel_t
*panelp
, unsigned int iobase
);
572 static void stl_cd1400echintr(stlpanel_t
*panelp
, unsigned int iobase
);
573 static void stl_cd1400txisr(stlpanel_t
*panelp
, int ioaddr
);
574 static void stl_cd1400rxisr(stlpanel_t
*panelp
, int ioaddr
);
575 static void stl_cd1400mdmisr(stlpanel_t
*panelp
, int ioaddr
);
577 static inline int stl_cd1400breakisr(stlport_t
*portp
, int ioaddr
);
580 * SC26198 uart specific handling functions.
582 static void stl_sc26198setreg(stlport_t
*portp
, int regnr
, int value
);
583 static int stl_sc26198getreg(stlport_t
*portp
, int regnr
);
584 static int stl_sc26198updatereg(stlport_t
*portp
, int regnr
, int value
);
585 static int stl_sc26198getglobreg(stlport_t
*portp
, int regnr
);
586 static int stl_sc26198panelinit(stlbrd_t
*brdp
, stlpanel_t
*panelp
);
587 static void stl_sc26198portinit(stlbrd_t
*brdp
, stlpanel_t
*panelp
, stlport_t
*portp
);
588 static void stl_sc26198setport(stlport_t
*portp
, struct termios
*tiosp
);
589 static int stl_sc26198getsignals(stlport_t
*portp
);
590 static void stl_sc26198setsignals(stlport_t
*portp
, int dtr
, int rts
);
591 static void stl_sc26198enablerxtx(stlport_t
*portp
, int rx
, int tx
);
592 static void stl_sc26198startrxtx(stlport_t
*portp
, int rx
, int tx
);
593 static void stl_sc26198disableintrs(stlport_t
*portp
);
594 static void stl_sc26198sendbreak(stlport_t
*portp
, int len
);
595 static void stl_sc26198flowctrl(stlport_t
*portp
, int state
);
596 static void stl_sc26198sendflow(stlport_t
*portp
, int state
);
597 static void stl_sc26198flush(stlport_t
*portp
);
598 static int stl_sc26198datastate(stlport_t
*portp
);
599 static void stl_sc26198wait(stlport_t
*portp
);
600 static void stl_sc26198txunflow(stlport_t
*portp
, struct tty_struct
*tty
);
601 static void stl_sc26198intr(stlpanel_t
*panelp
, unsigned int iobase
);
602 static void stl_sc26198txisr(stlport_t
*port
);
603 static void stl_sc26198rxisr(stlport_t
*port
, unsigned int iack
);
604 static void stl_sc26198rxbadch(stlport_t
*portp
, unsigned char status
, char ch
);
605 static void stl_sc26198rxbadchars(stlport_t
*portp
);
606 static void stl_sc26198otherisr(stlport_t
*port
, unsigned int iack
);
608 /*****************************************************************************/
611 * Generic UART support structure.
613 typedef struct uart
{
614 int (*panelinit
)(stlbrd_t
*brdp
, stlpanel_t
*panelp
);
615 void (*portinit
)(stlbrd_t
*brdp
, stlpanel_t
*panelp
, stlport_t
*portp
);
616 void (*setport
)(stlport_t
*portp
, struct termios
*tiosp
);
617 int (*getsignals
)(stlport_t
*portp
);
618 void (*setsignals
)(stlport_t
*portp
, int dtr
, int rts
);
619 void (*enablerxtx
)(stlport_t
*portp
, int rx
, int tx
);
620 void (*startrxtx
)(stlport_t
*portp
, int rx
, int tx
);
621 void (*disableintrs
)(stlport_t
*portp
);
622 void (*sendbreak
)(stlport_t
*portp
, int len
);
623 void (*flowctrl
)(stlport_t
*portp
, int state
);
624 void (*sendflow
)(stlport_t
*portp
, int state
);
625 void (*flush
)(stlport_t
*portp
);
626 int (*datastate
)(stlport_t
*portp
);
627 void (*intr
)(stlpanel_t
*panelp
, unsigned int iobase
);
631 * Define some macros to make calling these functions nice and clean.
633 #define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit)
634 #define stl_portinit (* ((uart_t *) portp->uartp)->portinit)
635 #define stl_setport (* ((uart_t *) portp->uartp)->setport)
636 #define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals)
637 #define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals)
638 #define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx)
639 #define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx)
640 #define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs)
641 #define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak)
642 #define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl)
643 #define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow)
644 #define stl_flush (* ((uart_t *) portp->uartp)->flush)
645 #define stl_datastate (* ((uart_t *) portp->uartp)->datastate)
647 /*****************************************************************************/
650 * CD1400 UART specific data initialization.
652 static uart_t stl_cd1400uart
= {
656 stl_cd1400getsignals
,
657 stl_cd1400setsignals
,
658 stl_cd1400enablerxtx
,
660 stl_cd1400disableintrs
,
670 * Define the offsets within the register bank of a cd1400 based panel.
671 * These io address offsets are common to the EasyIO board as well.
679 #define EREG_BANKSIZE 8
681 #define CD1400_CLK 25000000
682 #define CD1400_CLK8M 20000000
685 * Define the cd1400 baud rate clocks. These are used when calculating
686 * what clock and divisor to use for the required baud rate. Also
687 * define the maximum baud rate allowed, and the default base baud.
689 static int stl_cd1400clkdivs
[] = {
690 CD1400_CLK0
, CD1400_CLK1
, CD1400_CLK2
, CD1400_CLK3
, CD1400_CLK4
693 /*****************************************************************************/
696 * SC26198 UART specific data initization.
698 static uart_t stl_sc26198uart
= {
699 stl_sc26198panelinit
,
702 stl_sc26198getsignals
,
703 stl_sc26198setsignals
,
704 stl_sc26198enablerxtx
,
705 stl_sc26198startrxtx
,
706 stl_sc26198disableintrs
,
707 stl_sc26198sendbreak
,
711 stl_sc26198datastate
,
716 * Define the offsets within the register bank of a sc26198 based panel.
724 #define XP_BANKSIZE 4
727 * Define the sc26198 baud rate table. Offsets within the table
728 * represent the actual baud rate selector of sc26198 registers.
730 static unsigned int sc26198_baudtable
[] = {
731 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600,
732 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200,
733 230400, 460800, 921600
736 #define SC26198_NRBAUDS (sizeof(sc26198_baudtable) / sizeof(unsigned int))
738 /*****************************************************************************/
741 * Define the driver info for a user level control device. Used mainly
742 * to get at port stats - only not using the port device itself.
744 static struct file_operations stl_fsiomem
= {
749 /*****************************************************************************/
751 static devfs_handle_t devfs_handle
= NULL
;
756 * Loadable module initialization stuff.
764 printk("init_module()\n");
770 restore_flags(flags
);
775 /*****************************************************************************/
777 void cleanup_module()
786 printk("cleanup_module()\n");
789 printk(KERN_INFO
"Unloading %s: version %s\n", stl_drvtitle
,
796 * Free up all allocated resources used by the ports. This includes
797 * memory and interrupts. As part of this process we will also do
798 * a hangup on every open port - to try to flush out any processes
799 * hanging onto ports.
801 i
= tty_unregister_driver(&stl_serial
);
802 j
= tty_unregister_driver(&stl_callout
);
804 printk("STALLION: failed to un-register tty driver, "
805 "errno=%d,%d\n", -i
, -j
);
806 restore_flags(flags
);
809 devfs_unregister (devfs_handle
);
810 if ((i
= devfs_unregister_chrdev(STL_SIOMEMMAJOR
, "staliomem")))
811 printk("STALLION: failed to un-register serial memory device, "
814 if (stl_tmpwritebuf
!= (char *) NULL
)
815 kfree(stl_tmpwritebuf
);
817 for (i
= 0; (i
< stl_nrbrds
); i
++) {
818 if ((brdp
= stl_brds
[i
]) == (stlbrd_t
*) NULL
)
820 for (j
= 0; (j
< STL_MAXPANELS
); j
++) {
821 panelp
= brdp
->panels
[j
];
822 if (panelp
== (stlpanel_t
*) NULL
)
824 for (k
= 0; (k
< STL_PORTSPERPANEL
); k
++) {
825 portp
= panelp
->ports
[k
];
826 if (portp
== (stlport_t
*) NULL
)
828 if (portp
->tty
!= (struct tty_struct
*) NULL
)
829 stl_hangup(portp
->tty
);
830 if (portp
->tx
.buf
!= (char *) NULL
)
831 kfree(portp
->tx
.buf
);
837 release_region(brdp
->ioaddr1
, brdp
->iosize1
);
838 if (brdp
->iosize2
> 0)
839 release_region(brdp
->ioaddr2
, brdp
->iosize2
);
842 stl_brds
[i
] = (stlbrd_t
*) NULL
;
845 for (i
= 0; (i
< stl_numintrs
); i
++)
846 free_irq(stl_gotintrs
[i
], NULL
);
848 restore_flags(flags
);
851 /*****************************************************************************/
854 * Check for any arguments passed in on the module load command line.
857 static void stl_argbrds()
864 printk("stl_argbrds()\n");
867 nrargs
= sizeof(stl_brdsp
) / sizeof(char **);
869 for (i
= stl_nrbrds
; (i
< nrargs
); i
++) {
870 memset(&conf
, 0, sizeof(conf
));
871 if (stl_parsebrd(&conf
, stl_brdsp
[i
]) == 0)
873 if ((brdp
= stl_allocbrd()) == (stlbrd_t
*) NULL
)
877 brdp
->brdtype
= conf
.brdtype
;
878 brdp
->ioaddr1
= conf
.ioaddr1
;
879 brdp
->ioaddr2
= conf
.ioaddr2
;
880 brdp
->irq
= conf
.irq
;
881 brdp
->irqtype
= conf
.irqtype
;
886 /*****************************************************************************/
889 * Convert an ascii string number into an unsigned long.
892 static unsigned long stl_atol(char *str
)
900 if ((*sp
== '0') && (*(sp
+1) == 'x')) {
903 } else if (*sp
== '0') {
910 for (; (*sp
!= 0); sp
++) {
911 c
= (*sp
> '9') ? (TOLOWER(*sp
) - 'a' + 10) : (*sp
- '0');
912 if ((c
< 0) || (c
>= base
)) {
913 printk("STALLION: invalid argument %s\n", str
);
917 val
= (val
* base
) + c
;
922 /*****************************************************************************/
925 * Parse the supplied argument string, into the board conf struct.
928 static int stl_parsebrd(stlconf_t
*confp
, char **argp
)
934 printk("stl_parsebrd(confp=%x,argp=%x)\n", (int) confp
, (int) argp
);
937 if ((argp
[0] == (char *) NULL
) || (*argp
[0] == 0))
940 for (sp
= argp
[0], i
= 0; ((*sp
!= 0) && (i
< 25)); sp
++, i
++)
943 nrbrdnames
= sizeof(stl_brdstr
) / sizeof(stlbrdtype_t
);
944 for (i
= 0; (i
< nrbrdnames
); i
++) {
945 if (strcmp(stl_brdstr
[i
].name
, argp
[0]) == 0)
948 if (i
>= nrbrdnames
) {
949 printk("STALLION: unknown board name, %s?\n", argp
[0]);
953 confp
->brdtype
= stl_brdstr
[i
].type
;
956 if ((argp
[i
] != (char *) NULL
) && (*argp
[i
] != 0))
957 confp
->ioaddr1
= stl_atol(argp
[i
]);
959 if (confp
->brdtype
== BRD_ECH
) {
960 if ((argp
[i
] != (char *) NULL
) && (*argp
[i
] != 0))
961 confp
->ioaddr2
= stl_atol(argp
[i
]);
964 if ((argp
[i
] != (char *) NULL
) && (*argp
[i
] != 0))
965 confp
->irq
= stl_atol(argp
[i
]);
971 /*****************************************************************************/
974 * Local driver kernel memory allocation routine.
977 static void *stl_memalloc(int len
)
979 return((void *) kmalloc(len
, GFP_KERNEL
));
982 /*****************************************************************************/
985 * Allocate a new board structure. Fill out the basic info in it.
988 static stlbrd_t
*stl_allocbrd()
992 brdp
= (stlbrd_t
*) stl_memalloc(sizeof(stlbrd_t
));
993 if (brdp
== (stlbrd_t
*) NULL
) {
994 printk("STALLION: failed to allocate memory (size=%d)\n",
996 return((stlbrd_t
*) NULL
);
999 memset(brdp
, 0, sizeof(stlbrd_t
));
1000 brdp
->magic
= STL_BOARDMAGIC
;
1004 /*****************************************************************************/
1006 static int stl_open(struct tty_struct
*tty
, struct file
*filp
)
1010 unsigned int minordev
;
1011 int brdnr
, panelnr
, portnr
, rc
;
1014 printk("stl_open(tty=%x,filp=%x): device=%x\n", (int) tty
,
1015 (int) filp
, tty
->device
);
1018 minordev
= MINOR(tty
->device
);
1019 brdnr
= MINOR2BRD(minordev
);
1020 if (brdnr
>= stl_nrbrds
)
1022 brdp
= stl_brds
[brdnr
];
1023 if (brdp
== (stlbrd_t
*) NULL
)
1025 minordev
= MINOR2PORT(minordev
);
1026 for (portnr
= -1, panelnr
= 0; (panelnr
< STL_MAXPANELS
); panelnr
++) {
1027 if (brdp
->panels
[panelnr
] == (stlpanel_t
*) NULL
)
1029 if (minordev
< brdp
->panels
[panelnr
]->nrports
) {
1033 minordev
-= brdp
->panels
[panelnr
]->nrports
;
1038 portp
= brdp
->panels
[panelnr
]->ports
[portnr
];
1039 if (portp
== (stlport_t
*) NULL
)
1045 * On the first open of the device setup the port hardware, and
1046 * initialize the per port data structure.
1049 tty
->driver_data
= portp
;
1052 if ((portp
->flags
& ASYNC_INITIALIZED
) == 0) {
1053 if (portp
->tx
.buf
== (char *) NULL
) {
1054 portp
->tx
.buf
= (char *) stl_memalloc(STL_TXBUFSIZE
);
1055 if (portp
->tx
.buf
== (char *) NULL
)
1057 portp
->tx
.head
= portp
->tx
.buf
;
1058 portp
->tx
.tail
= portp
->tx
.buf
;
1060 stl_setport(portp
, tty
->termios
);
1061 portp
->sigs
= stl_getsignals(portp
);
1062 stl_setsignals(portp
, 1, 1);
1063 stl_enablerxtx(portp
, 1, 1);
1064 stl_startrxtx(portp
, 1, 0);
1065 clear_bit(TTY_IO_ERROR
, &tty
->flags
);
1066 portp
->flags
|= ASYNC_INITIALIZED
;
1070 * Check if this port is in the middle of closing. If so then wait
1071 * until it is closed then return error status, based on flag settings.
1072 * The sleep here does not need interrupt protection since the wakeup
1073 * for it is done with the same context.
1075 if (portp
->flags
& ASYNC_CLOSING
) {
1076 interruptible_sleep_on(&portp
->close_wait
);
1077 if (portp
->flags
& ASYNC_HUP_NOTIFY
)
1079 return(-ERESTARTSYS
);
1083 * Based on type of open being done check if it can overlap with any
1084 * previous opens still in effect. If we are a normal serial device
1085 * then also we might have to wait for carrier.
1087 if (tty
->driver
.subtype
== STL_DRVTYPCALLOUT
) {
1088 if (portp
->flags
& ASYNC_NORMAL_ACTIVE
)
1090 if (portp
->flags
& ASYNC_CALLOUT_ACTIVE
) {
1091 if ((portp
->flags
& ASYNC_SESSION_LOCKOUT
) &&
1092 (portp
->session
!= current
->session
))
1094 if ((portp
->flags
& ASYNC_PGRP_LOCKOUT
) &&
1095 (portp
->pgrp
!= current
->pgrp
))
1098 portp
->flags
|= ASYNC_CALLOUT_ACTIVE
;
1100 if (filp
->f_flags
& O_NONBLOCK
) {
1101 if (portp
->flags
& ASYNC_CALLOUT_ACTIVE
)
1104 if ((rc
= stl_waitcarrier(portp
, filp
)) != 0)
1107 portp
->flags
|= ASYNC_NORMAL_ACTIVE
;
1110 if ((portp
->refcount
== 1) && (portp
->flags
& ASYNC_SPLIT_TERMIOS
)) {
1111 if (tty
->driver
.subtype
== STL_DRVTYPSERIAL
)
1112 *tty
->termios
= portp
->normaltermios
;
1114 *tty
->termios
= portp
->callouttermios
;
1115 stl_setport(portp
, tty
->termios
);
1118 portp
->session
= current
->session
;
1119 portp
->pgrp
= current
->pgrp
;
1123 /*****************************************************************************/
1126 * Possibly need to wait for carrier (DCD signal) to come high. Say
1127 * maybe because if we are clocal then we don't need to wait...
1130 static int stl_waitcarrier(stlport_t
*portp
, struct file
*filp
)
1132 unsigned long flags
;
1136 printk("stl_waitcarrier(portp=%x,filp=%x)\n", (int) portp
, (int) filp
);
1142 if (portp
->flags
& ASYNC_CALLOUT_ACTIVE
) {
1143 if (portp
->normaltermios
.c_cflag
& CLOCAL
)
1146 if (portp
->tty
->termios
->c_cflag
& CLOCAL
)
1152 portp
->openwaitcnt
++;
1153 if (! tty_hung_up_p(filp
))
1157 if ((portp
->flags
& ASYNC_CALLOUT_ACTIVE
) == 0)
1158 stl_setsignals(portp
, 1, 1);
1159 if (tty_hung_up_p(filp
) ||
1160 ((portp
->flags
& ASYNC_INITIALIZED
) == 0)) {
1161 if (portp
->flags
& ASYNC_HUP_NOTIFY
)
1167 if (((portp
->flags
& ASYNC_CALLOUT_ACTIVE
) == 0) &&
1168 ((portp
->flags
& ASYNC_CLOSING
) == 0) &&
1169 (doclocal
|| (portp
->sigs
& TIOCM_CD
))) {
1172 if (signal_pending(current
)) {
1176 interruptible_sleep_on(&portp
->open_wait
);
1179 if (! tty_hung_up_p(filp
))
1181 portp
->openwaitcnt
--;
1182 restore_flags(flags
);
1187 /*****************************************************************************/
1189 static void stl_close(struct tty_struct
*tty
, struct file
*filp
)
1192 unsigned long flags
;
1195 printk("stl_close(tty=%x,filp=%x)\n", (int) tty
, (int) filp
);
1198 portp
= tty
->driver_data
;
1199 if (portp
== (stlport_t
*) NULL
)
1204 if (tty_hung_up_p(filp
)) {
1206 restore_flags(flags
);
1209 if ((tty
->count
== 1) && (portp
->refcount
!= 1))
1210 portp
->refcount
= 1;
1211 if (portp
->refcount
-- > 1) {
1213 restore_flags(flags
);
1217 portp
->refcount
= 0;
1218 portp
->flags
|= ASYNC_CLOSING
;
1220 if (portp
->flags
& ASYNC_NORMAL_ACTIVE
)
1221 portp
->normaltermios
= *tty
->termios
;
1222 if (portp
->flags
& ASYNC_CALLOUT_ACTIVE
)
1223 portp
->callouttermios
= *tty
->termios
;
1226 * May want to wait for any data to drain before closing. The BUSY
1227 * flag keeps track of whether we are still sending or not - it is
1228 * very accurate for the cd1400, not quite so for the sc26198.
1229 * (The sc26198 has no "end-of-data" interrupt only empty FIFO)
1232 if (portp
->closing_wait
!= ASYNC_CLOSING_WAIT_NONE
)
1233 tty_wait_until_sent(tty
, portp
->closing_wait
);
1234 stl_waituntilsent(tty
, (HZ
/ 2));
1236 portp
->flags
&= ~ASYNC_INITIALIZED
;
1237 stl_disableintrs(portp
);
1238 if (tty
->termios
->c_cflag
& HUPCL
)
1239 stl_setsignals(portp
, 0, 0);
1240 stl_enablerxtx(portp
, 0, 0);
1241 stl_flushbuffer(tty
);
1243 if (portp
->tx
.buf
!= (char *) NULL
) {
1244 kfree(portp
->tx
.buf
);
1245 portp
->tx
.buf
= (char *) NULL
;
1246 portp
->tx
.head
= (char *) NULL
;
1247 portp
->tx
.tail
= (char *) NULL
;
1249 set_bit(TTY_IO_ERROR
, &tty
->flags
);
1250 if (tty
->ldisc
.flush_buffer
)
1251 (tty
->ldisc
.flush_buffer
)(tty
);
1254 portp
->tty
= (struct tty_struct
*) NULL
;
1256 if (portp
->openwaitcnt
) {
1257 if (portp
->close_delay
)
1258 stl_delay(portp
->close_delay
);
1259 wake_up_interruptible(&portp
->open_wait
);
1262 portp
->flags
&= ~(ASYNC_CALLOUT_ACTIVE
| ASYNC_NORMAL_ACTIVE
|
1264 wake_up_interruptible(&portp
->close_wait
);
1266 restore_flags(flags
);
1269 /*****************************************************************************/
1272 * Wait for a specified delay period, this is not a busy-loop. It will
1273 * give up the processor while waiting. Unfortunately this has some
1274 * rather intimate knowledge of the process management stuff.
1277 static void stl_delay(int len
)
1280 printk("stl_delay(len=%d)\n", len
);
1283 current
->state
= TASK_INTERRUPTIBLE
;
1284 schedule_timeout(len
);
1285 current
->state
= TASK_RUNNING
;
1289 /*****************************************************************************/
1292 * Write routine. Take data and stuff it in to the TX ring queue.
1293 * If transmit interrupts are not running then start them.
1296 static int stl_write(struct tty_struct
*tty
, int from_user
, const unsigned char *buf
, int count
)
1299 unsigned int len
, stlen
;
1300 unsigned char *chbuf
;
1304 printk("stl_write(tty=%x,from_user=%d,buf=%x,count=%d)\n",
1305 (int) tty
, from_user
, (int) buf
, count
);
1308 if ((tty
== (struct tty_struct
*) NULL
) ||
1309 (stl_tmpwritebuf
== (char *) NULL
))
1311 portp
= tty
->driver_data
;
1312 if (portp
== (stlport_t
*) NULL
)
1314 if (portp
->tx
.buf
== (char *) NULL
)
1318 * If copying direct from user space we must cater for page faults,
1319 * causing us to "sleep" here for a while. To handle this copy in all
1320 * the data we need now, into a local buffer. Then when we got it all
1321 * copy it into the TX buffer.
1323 chbuf
= (unsigned char *) buf
;
1325 head
= portp
->tx
.head
;
1326 tail
= portp
->tx
.tail
;
1327 len
= (head
>= tail
) ? (STL_TXBUFSIZE
- (head
- tail
) - 1) :
1329 count
= MIN(len
, count
);
1331 down(&stl_tmpwritesem
);
1332 copy_from_user(stl_tmpwritebuf
, chbuf
, count
);
1333 chbuf
= &stl_tmpwritebuf
[0];
1336 head
= portp
->tx
.head
;
1337 tail
= portp
->tx
.tail
;
1339 len
= STL_TXBUFSIZE
- (head
- tail
) - 1;
1340 stlen
= STL_TXBUFSIZE
- (head
- portp
->tx
.buf
);
1342 len
= tail
- head
- 1;
1346 len
= MIN(len
, count
);
1349 stlen
= MIN(len
, stlen
);
1350 memcpy(head
, chbuf
, stlen
);
1355 if (head
>= (portp
->tx
.buf
+ STL_TXBUFSIZE
)) {
1356 head
= portp
->tx
.buf
;
1357 stlen
= tail
- head
;
1360 portp
->tx
.head
= head
;
1362 clear_bit(ASYI_TXLOW
, &portp
->istate
);
1363 stl_startrxtx(portp
, -1, 1);
1366 up(&stl_tmpwritesem
);
1371 /*****************************************************************************/
1373 static void stl_putchar(struct tty_struct
*tty
, unsigned char ch
)
1380 printk("stl_putchar(tty=%x,ch=%x)\n", (int) tty
, (int) ch
);
1383 if (tty
== (struct tty_struct
*) NULL
)
1385 portp
= tty
->driver_data
;
1386 if (portp
== (stlport_t
*) NULL
)
1388 if (portp
->tx
.buf
== (char *) NULL
)
1391 head
= portp
->tx
.head
;
1392 tail
= portp
->tx
.tail
;
1394 len
= (head
>= tail
) ? (STL_TXBUFSIZE
- (head
- tail
)) : (tail
- head
);
1399 if (head
>= (portp
->tx
.buf
+ STL_TXBUFSIZE
))
1400 head
= portp
->tx
.buf
;
1402 portp
->tx
.head
= head
;
1405 /*****************************************************************************/
1408 * If there are any characters in the buffer then make sure that TX
1409 * interrupts are on and get'em out. Normally used after the putchar
1410 * routine has been called.
1413 static void stl_flushchars(struct tty_struct
*tty
)
1418 printk("stl_flushchars(tty=%x)\n", (int) tty
);
1421 if (tty
== (struct tty_struct
*) NULL
)
1423 portp
= tty
->driver_data
;
1424 if (portp
== (stlport_t
*) NULL
)
1426 if (portp
->tx
.buf
== (char *) NULL
)
1430 if (tty
->stopped
|| tty
->hw_stopped
||
1431 (portp
->tx
.head
== portp
->tx
.tail
))
1434 stl_startrxtx(portp
, -1, 1);
1437 /*****************************************************************************/
1439 static int stl_writeroom(struct tty_struct
*tty
)
1445 printk("stl_writeroom(tty=%x)\n", (int) tty
);
1448 if (tty
== (struct tty_struct
*) NULL
)
1450 portp
= tty
->driver_data
;
1451 if (portp
== (stlport_t
*) NULL
)
1453 if (portp
->tx
.buf
== (char *) NULL
)
1456 head
= portp
->tx
.head
;
1457 tail
= portp
->tx
.tail
;
1458 return((head
>= tail
) ? (STL_TXBUFSIZE
- (head
- tail
) - 1) : (tail
- head
- 1));
1461 /*****************************************************************************/
1464 * Return number of chars in the TX buffer. Normally we would just
1465 * calculate the number of chars in the buffer and return that, but if
1466 * the buffer is empty and TX interrupts are still on then we return
1467 * that the buffer still has 1 char in it. This way whoever called us
1468 * will not think that ALL chars have drained - since the UART still
1469 * must have some chars in it (we are busy after all).
1472 static int stl_charsinbuffer(struct tty_struct
*tty
)
1479 printk("stl_charsinbuffer(tty=%x)\n", (int) tty
);
1482 if (tty
== (struct tty_struct
*) NULL
)
1484 portp
= tty
->driver_data
;
1485 if (portp
== (stlport_t
*) NULL
)
1487 if (portp
->tx
.buf
== (char *) NULL
)
1490 head
= portp
->tx
.head
;
1491 tail
= portp
->tx
.tail
;
1492 size
= (head
>= tail
) ? (head
- tail
) : (STL_TXBUFSIZE
- (tail
- head
));
1493 if ((size
== 0) && test_bit(ASYI_TXBUSY
, &portp
->istate
))
1498 /*****************************************************************************/
1501 * Generate the serial struct info.
1504 static void stl_getserial(stlport_t
*portp
, struct serial_struct
*sp
)
1506 struct serial_struct sio
;
1510 printk("stl_getserial(portp=%x,sp=%x)\n", (int) portp
, (int) sp
);
1513 memset(&sio
, 0, sizeof(struct serial_struct
));
1514 sio
.line
= portp
->portnr
;
1515 sio
.port
= portp
->ioaddr
;
1516 sio
.flags
= portp
->flags
;
1517 sio
.baud_base
= portp
->baud_base
;
1518 sio
.close_delay
= portp
->close_delay
;
1519 sio
.closing_wait
= portp
->closing_wait
;
1520 sio
.custom_divisor
= portp
->custom_divisor
;
1522 if (portp
->uartp
== &stl_cd1400uart
) {
1523 sio
.type
= PORT_CIRRUS
;
1524 sio
.xmit_fifo_size
= CD1400_TXFIFOSIZE
;
1526 sio
.type
= PORT_UNKNOWN
;
1527 sio
.xmit_fifo_size
= SC26198_TXFIFOSIZE
;
1530 brdp
= stl_brds
[portp
->brdnr
];
1531 if (brdp
!= (stlbrd_t
*) NULL
)
1532 sio
.irq
= brdp
->irq
;
1534 copy_to_user(sp
, &sio
, sizeof(struct serial_struct
));
1537 /*****************************************************************************/
1540 * Set port according to the serial struct info.
1541 * At this point we do not do any auto-configure stuff, so we will
1542 * just quietly ignore any requests to change irq, etc.
1545 static int stl_setserial(stlport_t
*portp
, struct serial_struct
*sp
)
1547 struct serial_struct sio
;
1550 printk("stl_setserial(portp=%x,sp=%x)\n", (int) portp
, (int) sp
);
1553 copy_from_user(&sio
, sp
, sizeof(struct serial_struct
));
1554 if (!capable(CAP_SYS_ADMIN
)) {
1555 if ((sio
.baud_base
!= portp
->baud_base
) ||
1556 (sio
.close_delay
!= portp
->close_delay
) ||
1557 ((sio
.flags
& ~ASYNC_USR_MASK
) !=
1558 (portp
->flags
& ~ASYNC_USR_MASK
)))
1562 portp
->flags
= (portp
->flags
& ~ASYNC_USR_MASK
) |
1563 (sio
.flags
& ASYNC_USR_MASK
);
1564 portp
->baud_base
= sio
.baud_base
;
1565 portp
->close_delay
= sio
.close_delay
;
1566 portp
->closing_wait
= sio
.closing_wait
;
1567 portp
->custom_divisor
= sio
.custom_divisor
;
1568 stl_setport(portp
, portp
->tty
->termios
);
1572 /*****************************************************************************/
1574 static int stl_ioctl(struct tty_struct
*tty
, struct file
*file
, unsigned int cmd
, unsigned long arg
)
1581 printk("stl_ioctl(tty=%x,file=%x,cmd=%x,arg=%x)\n",
1582 (int) tty
, (int) file
, cmd
, (int) arg
);
1585 if (tty
== (struct tty_struct
*) NULL
)
1587 portp
= tty
->driver_data
;
1588 if (portp
== (stlport_t
*) NULL
)
1591 if ((cmd
!= TIOCGSERIAL
) && (cmd
!= TIOCSSERIAL
) &&
1592 (cmd
!= COM_GETPORTSTATS
) && (cmd
!= COM_CLRPORTSTATS
)) {
1593 if (tty
->flags
& (1 << TTY_IO_ERROR
))
1601 rc
= put_user(((tty
->termios
->c_cflag
& CLOCAL
) ? 1 : 0),
1602 (unsigned int *) arg
);
1605 if ((rc
= verify_area(VERIFY_READ
, (void *) arg
,
1606 sizeof(int))) == 0) {
1607 get_user(ival
, (unsigned int *) arg
);
1608 tty
->termios
->c_cflag
=
1609 (tty
->termios
->c_cflag
& ~CLOCAL
) |
1610 (ival
? CLOCAL
: 0);
1614 if ((rc
= verify_area(VERIFY_WRITE
, (void *) arg
,
1615 sizeof(unsigned int))) == 0) {
1616 ival
= stl_getsignals(portp
);
1617 put_user(ival
, (unsigned int *) arg
);
1621 if ((rc
= verify_area(VERIFY_READ
, (void *) arg
,
1622 sizeof(unsigned int))) == 0) {
1623 get_user(ival
, (unsigned int *) arg
);
1624 stl_setsignals(portp
, ((ival
& TIOCM_DTR
) ? 1 : -1),
1625 ((ival
& TIOCM_RTS
) ? 1 : -1));
1629 if ((rc
= verify_area(VERIFY_READ
, (void *) arg
,
1630 sizeof(unsigned int))) == 0) {
1631 get_user(ival
, (unsigned int *) arg
);
1632 stl_setsignals(portp
, ((ival
& TIOCM_DTR
) ? 0 : -1),
1633 ((ival
& TIOCM_RTS
) ? 0 : -1));
1637 if ((rc
= verify_area(VERIFY_READ
, (void *) arg
,
1638 sizeof(unsigned int))) == 0) {
1639 get_user(ival
, (unsigned int *) arg
);
1640 stl_setsignals(portp
, ((ival
& TIOCM_DTR
) ? 1 : 0),
1641 ((ival
& TIOCM_RTS
) ? 1 : 0));
1645 if ((rc
= verify_area(VERIFY_WRITE
, (void *) arg
,
1646 sizeof(struct serial_struct
))) == 0)
1647 stl_getserial(portp
, (struct serial_struct
*) arg
);
1650 if ((rc
= verify_area(VERIFY_READ
, (void *) arg
,
1651 sizeof(struct serial_struct
))) == 0)
1652 rc
= stl_setserial(portp
, (struct serial_struct
*) arg
);
1654 case COM_GETPORTSTATS
:
1655 if ((rc
= verify_area(VERIFY_WRITE
, (void *) arg
,
1656 sizeof(comstats_t
))) == 0)
1657 rc
= stl_getportstats(portp
, (comstats_t
*) arg
);
1659 case COM_CLRPORTSTATS
:
1660 if ((rc
= verify_area(VERIFY_WRITE
, (void *) arg
,
1661 sizeof(comstats_t
))) == 0)
1662 rc
= stl_clrportstats(portp
, (comstats_t
*) arg
);
1668 case TIOCSERGSTRUCT
:
1669 case TIOCSERGETMULTI
:
1670 case TIOCSERSETMULTI
:
1679 /*****************************************************************************/
1681 static void stl_settermios(struct tty_struct
*tty
, struct termios
*old
)
1684 struct termios
*tiosp
;
1687 printk("stl_settermios(tty=%x,old=%x)\n", (int) tty
, (int) old
);
1690 if (tty
== (struct tty_struct
*) NULL
)
1692 portp
= tty
->driver_data
;
1693 if (portp
== (stlport_t
*) NULL
)
1696 tiosp
= tty
->termios
;
1697 if ((tiosp
->c_cflag
== old
->c_cflag
) &&
1698 (tiosp
->c_iflag
== old
->c_iflag
))
1701 stl_setport(portp
, tiosp
);
1702 stl_setsignals(portp
, ((tiosp
->c_cflag
& (CBAUD
& ~CBAUDEX
)) ? 1 : 0),
1704 if ((old
->c_cflag
& CRTSCTS
) && ((tiosp
->c_cflag
& CRTSCTS
) == 0)) {
1705 tty
->hw_stopped
= 0;
1708 if (((old
->c_cflag
& CLOCAL
) == 0) && (tiosp
->c_cflag
& CLOCAL
))
1709 wake_up_interruptible(&portp
->open_wait
);
1712 /*****************************************************************************/
1715 * Attempt to flow control who ever is sending us data. Based on termios
1716 * settings use software or/and hardware flow control.
1719 static void stl_throttle(struct tty_struct
*tty
)
1724 printk("stl_throttle(tty=%x)\n", (int) tty
);
1727 if (tty
== (struct tty_struct
*) NULL
)
1729 portp
= tty
->driver_data
;
1730 if (portp
== (stlport_t
*) NULL
)
1732 stl_flowctrl(portp
, 0);
1735 /*****************************************************************************/
1738 * Unflow control the device sending us data...
1741 static void stl_unthrottle(struct tty_struct
*tty
)
1746 printk("stl_unthrottle(tty=%x)\n", (int) tty
);
1749 if (tty
== (struct tty_struct
*) NULL
)
1751 portp
= tty
->driver_data
;
1752 if (portp
== (stlport_t
*) NULL
)
1754 stl_flowctrl(portp
, 1);
1757 /*****************************************************************************/
1760 * Stop the transmitter. Basically to do this we will just turn TX
1764 static void stl_stop(struct tty_struct
*tty
)
1769 printk("stl_stop(tty=%x)\n", (int) tty
);
1772 if (tty
== (struct tty_struct
*) NULL
)
1774 portp
= tty
->driver_data
;
1775 if (portp
== (stlport_t
*) NULL
)
1777 stl_startrxtx(portp
, -1, 0);
1780 /*****************************************************************************/
1783 * Start the transmitter again. Just turn TX interrupts back on.
1786 static void stl_start(struct tty_struct
*tty
)
1791 printk("stl_start(tty=%x)\n", (int) tty
);
1794 if (tty
== (struct tty_struct
*) NULL
)
1796 portp
= tty
->driver_data
;
1797 if (portp
== (stlport_t
*) NULL
)
1799 stl_startrxtx(portp
, -1, 1);
1802 /*****************************************************************************/
1805 * Hangup this port. This is pretty much like closing the port, only
1806 * a little more brutal. No waiting for data to drain. Shutdown the
1807 * port and maybe drop signals.
1810 static void stl_hangup(struct tty_struct
*tty
)
1815 printk("stl_hangup(tty=%x)\n", (int) tty
);
1818 if (tty
== (struct tty_struct
*) NULL
)
1820 portp
= tty
->driver_data
;
1821 if (portp
== (stlport_t
*) NULL
)
1824 portp
->flags
&= ~ASYNC_INITIALIZED
;
1825 stl_disableintrs(portp
);
1826 if (tty
->termios
->c_cflag
& HUPCL
)
1827 stl_setsignals(portp
, 0, 0);
1828 stl_enablerxtx(portp
, 0, 0);
1829 stl_flushbuffer(tty
);
1831 set_bit(TTY_IO_ERROR
, &tty
->flags
);
1832 if (portp
->tx
.buf
!= (char *) NULL
) {
1833 kfree(portp
->tx
.buf
);
1834 portp
->tx
.buf
= (char *) NULL
;
1835 portp
->tx
.head
= (char *) NULL
;
1836 portp
->tx
.tail
= (char *) NULL
;
1838 portp
->tty
= (struct tty_struct
*) NULL
;
1839 portp
->flags
&= ~(ASYNC_NORMAL_ACTIVE
| ASYNC_CALLOUT_ACTIVE
);
1840 portp
->refcount
= 0;
1841 wake_up_interruptible(&portp
->open_wait
);
1844 /*****************************************************************************/
1846 static void stl_flushbuffer(struct tty_struct
*tty
)
1851 printk("stl_flushbuffer(tty=%x)\n", (int) tty
);
1854 if (tty
== (struct tty_struct
*) NULL
)
1856 portp
= tty
->driver_data
;
1857 if (portp
== (stlport_t
*) NULL
)
1861 wake_up_interruptible(&tty
->write_wait
);
1862 if ((tty
->flags
& (1 << TTY_DO_WRITE_WAKEUP
)) &&
1863 tty
->ldisc
.write_wakeup
)
1864 (tty
->ldisc
.write_wakeup
)(tty
);
1867 /*****************************************************************************/
1869 static void stl_breakctl(struct tty_struct
*tty
, int state
)
1874 printk("stl_breakctl(tty=%x,state=%d)\n", (int) tty
, state
);
1877 if (tty
== (struct tty_struct
*) NULL
)
1879 portp
= tty
->driver_data
;
1880 if (portp
== (stlport_t
*) NULL
)
1883 stl_sendbreak(portp
, ((state
== -1) ? 1 : 2));
1886 /*****************************************************************************/
1888 static void stl_waituntilsent(struct tty_struct
*tty
, int timeout
)
1894 printk("stl_waituntilsent(tty=%x,timeout=%d)\n", (int) tty
, timeout
);
1897 if (tty
== (struct tty_struct
*) NULL
)
1899 portp
= tty
->driver_data
;
1900 if (portp
== (stlport_t
*) NULL
)
1905 tend
= jiffies
+ timeout
;
1907 while (stl_datastate(portp
)) {
1908 if (signal_pending(current
))
1911 if (time_after_eq(jiffies
, tend
))
1916 /*****************************************************************************/
1918 static void stl_sendxchar(struct tty_struct
*tty
, char ch
)
1923 printk("stl_sendxchar(tty=%x,ch=%x)\n", (int) tty
, ch
);
1926 if (tty
== (struct tty_struct
*) NULL
)
1928 portp
= tty
->driver_data
;
1929 if (portp
== (stlport_t
*) NULL
)
1932 if (ch
== STOP_CHAR(tty
))
1933 stl_sendflow(portp
, 0);
1934 else if (ch
== START_CHAR(tty
))
1935 stl_sendflow(portp
, 1);
1937 stl_putchar(tty
, ch
);
1940 /*****************************************************************************/
1945 * Format info for a specified port. The line is deliberately limited
1946 * to 80 characters. (If it is too long it will be truncated, if too
1947 * short then padded with spaces).
1950 static int stl_portinfo(stlport_t
*portp
, int portnr
, char *pos
)
1956 sp
+= sprintf(sp
, "%d: uart:%s tx:%d rx:%d",
1957 portnr
, (portp
->hwid
== 1) ? "SC26198" : "CD1400",
1958 (int) portp
->stats
.txtotal
, (int) portp
->stats
.rxtotal
);
1960 if (portp
->stats
.rxframing
)
1961 sp
+= sprintf(sp
, " fe:%d", (int) portp
->stats
.rxframing
);
1962 if (portp
->stats
.rxparity
)
1963 sp
+= sprintf(sp
, " pe:%d", (int) portp
->stats
.rxparity
);
1964 if (portp
->stats
.rxbreaks
)
1965 sp
+= sprintf(sp
, " brk:%d", (int) portp
->stats
.rxbreaks
);
1966 if (portp
->stats
.rxoverrun
)
1967 sp
+= sprintf(sp
, " oe:%d", (int) portp
->stats
.rxoverrun
);
1969 sigs
= stl_getsignals(portp
);
1970 cnt
= sprintf(sp
, "%s%s%s%s%s ",
1971 (sigs
& TIOCM_RTS
) ? "|RTS" : "",
1972 (sigs
& TIOCM_CTS
) ? "|CTS" : "",
1973 (sigs
& TIOCM_DTR
) ? "|DTR" : "",
1974 (sigs
& TIOCM_CD
) ? "|DCD" : "",
1975 (sigs
& TIOCM_DSR
) ? "|DSR" : "");
1979 for (cnt
= (sp
- pos
); (cnt
< (MAXLINE
- 1)); cnt
++)
1982 pos
[(MAXLINE
- 2)] = '+';
1983 pos
[(MAXLINE
- 1)] = '\n';
1988 /*****************************************************************************/
1991 * Port info, read from the /proc file system.
1994 static int stl_readproc(char *page
, char **start
, off_t off
, int count
, int *eof
, void *data
)
1999 int brdnr
, panelnr
, portnr
, totalport
;
2004 printk("stl_readproc(page=%x,start=%x,off=%x,count=%d,eof=%x,"
2005 "data=%x\n", (int) page
, (int) start
, (int) off
, count
,
2006 (int) eof
, (int) data
);
2014 pos
+= sprintf(pos
, "%s: version %s", stl_drvtitle
,
2016 while (pos
< (page
+ MAXLINE
- 1))
2023 * We scan through for each board, panel and port. The offset is
2024 * calculated on the fly, and irrelevant ports are skipped.
2026 for (brdnr
= 0; (brdnr
< stl_nrbrds
); brdnr
++) {
2027 brdp
= stl_brds
[brdnr
];
2028 if (brdp
== (stlbrd_t
*) NULL
)
2030 if (brdp
->state
== 0)
2033 maxoff
= curoff
+ (brdp
->nrports
* MAXLINE
);
2034 if (off
>= maxoff
) {
2039 totalport
= brdnr
* STL_MAXPORTS
;
2040 for (panelnr
= 0; (panelnr
< brdp
->nrpanels
); panelnr
++) {
2041 panelp
= brdp
->panels
[panelnr
];
2042 if (panelp
== (stlpanel_t
*) NULL
)
2045 maxoff
= curoff
+ (panelp
->nrports
* MAXLINE
);
2046 if (off
>= maxoff
) {
2048 totalport
+= panelp
->nrports
;
2052 for (portnr
= 0; (portnr
< panelp
->nrports
); portnr
++,
2054 portp
= panelp
->ports
[portnr
];
2055 if (portp
== (stlport_t
*) NULL
)
2057 if (off
>= (curoff
+= MAXLINE
))
2059 if ((pos
- page
+ MAXLINE
) > count
)
2061 pos
+= stl_portinfo(portp
, totalport
, pos
);
2073 /*****************************************************************************/
2076 * All board interrupts are vectored through here first. This code then
2077 * calls off to the approrpriate board interrupt handlers.
2080 static void stl_intr(int irq
, void *dev_id
, struct pt_regs
*regs
)
2086 printk("stl_intr(irq=%d,regs=%x)\n", irq
, (int) regs
);
2089 for (i
= 0; (i
< stl_nrbrds
); i
++) {
2090 if ((brdp
= stl_brds
[i
]) == (stlbrd_t
*) NULL
)
2092 if (brdp
->state
== 0)
2094 (* brdp
->isr
)(brdp
);
2098 /*****************************************************************************/
2101 * Interrupt service routine for EasyIO board types.
2104 static void stl_eiointr(stlbrd_t
*brdp
)
2107 unsigned int iobase
;
2109 panelp
= brdp
->panels
[0];
2110 iobase
= panelp
->iobase
;
2111 while (inb(brdp
->iostatus
) & EIO_INTRPEND
)
2112 (* panelp
->isr
)(panelp
, iobase
);
2115 /*****************************************************************************/
2118 * Interrupt service routine for ECH-AT board types.
2121 static void stl_echatintr(stlbrd_t
*brdp
)
2124 unsigned int ioaddr
;
2127 outb((brdp
->ioctrlval
| ECH_BRDENABLE
), brdp
->ioctrl
);
2129 while (inb(brdp
->iostatus
) & ECH_INTRPEND
) {
2130 for (bnknr
= 0; (bnknr
< brdp
->nrbnks
); bnknr
++) {
2131 ioaddr
= brdp
->bnkstataddr
[bnknr
];
2132 if (inb(ioaddr
) & ECH_PNLINTRPEND
) {
2133 panelp
= brdp
->bnk2panel
[bnknr
];
2134 (* panelp
->isr
)(panelp
, (ioaddr
& 0xfffc));
2139 outb((brdp
->ioctrlval
| ECH_BRDDISABLE
), brdp
->ioctrl
);
2142 /*****************************************************************************/
2145 * Interrupt service routine for ECH-MCA board types.
2148 static void stl_echmcaintr(stlbrd_t
*brdp
)
2151 unsigned int ioaddr
;
2154 while (inb(brdp
->iostatus
) & ECH_INTRPEND
) {
2155 for (bnknr
= 0; (bnknr
< brdp
->nrbnks
); bnknr
++) {
2156 ioaddr
= brdp
->bnkstataddr
[bnknr
];
2157 if (inb(ioaddr
) & ECH_PNLINTRPEND
) {
2158 panelp
= brdp
->bnk2panel
[bnknr
];
2159 (* panelp
->isr
)(panelp
, (ioaddr
& 0xfffc));
2165 /*****************************************************************************/
2168 * Interrupt service routine for ECH-PCI board types.
2171 static void stl_echpciintr(stlbrd_t
*brdp
)
2174 unsigned int ioaddr
;
2179 for (bnknr
= 0; (bnknr
< brdp
->nrbnks
); bnknr
++) {
2180 outb(brdp
->bnkpageaddr
[bnknr
], brdp
->ioctrl
);
2181 ioaddr
= brdp
->bnkstataddr
[bnknr
];
2182 if (inb(ioaddr
) & ECH_PNLINTRPEND
) {
2183 panelp
= brdp
->bnk2panel
[bnknr
];
2184 (* panelp
->isr
)(panelp
, (ioaddr
& 0xfffc));
2193 /*****************************************************************************/
2196 * Interrupt service routine for ECH-8/64-PCI board types.
2199 static void stl_echpci64intr(stlbrd_t
*brdp
)
2202 unsigned int ioaddr
;
2205 while (inb(brdp
->ioctrl
) & 0x1) {
2206 for (bnknr
= 0; (bnknr
< brdp
->nrbnks
); bnknr
++) {
2207 ioaddr
= brdp
->bnkstataddr
[bnknr
];
2208 if (inb(ioaddr
) & ECH_PNLINTRPEND
) {
2209 panelp
= brdp
->bnk2panel
[bnknr
];
2210 (* panelp
->isr
)(panelp
, (ioaddr
& 0xfffc));
2216 /*****************************************************************************/
2219 * Service an off-level request for some channel.
2221 static void stl_offintr(void *private)
2224 struct tty_struct
*tty
;
2225 unsigned int oldsigs
;
2230 printk("stl_offintr(portp=%x)\n", (int) portp
);
2233 if (portp
== (stlport_t
*) NULL
)
2237 if (tty
== (struct tty_struct
*) NULL
)
2241 if (test_bit(ASYI_TXLOW
, &portp
->istate
)) {
2242 if ((tty
->flags
& (1 << TTY_DO_WRITE_WAKEUP
)) &&
2243 tty
->ldisc
.write_wakeup
)
2244 (tty
->ldisc
.write_wakeup
)(tty
);
2245 wake_up_interruptible(&tty
->write_wait
);
2247 if (test_bit(ASYI_DCDCHANGE
, &portp
->istate
)) {
2248 clear_bit(ASYI_DCDCHANGE
, &portp
->istate
);
2249 oldsigs
= portp
->sigs
;
2250 portp
->sigs
= stl_getsignals(portp
);
2251 if ((portp
->sigs
& TIOCM_CD
) && ((oldsigs
& TIOCM_CD
) == 0))
2252 wake_up_interruptible(&portp
->open_wait
);
2253 if ((oldsigs
& TIOCM_CD
) && ((portp
->sigs
& TIOCM_CD
) == 0)) {
2254 if (portp
->flags
& ASYNC_CHECK_CD
) {
2255 if (! ((portp
->flags
& ASYNC_CALLOUT_ACTIVE
) &&
2256 (portp
->flags
& ASYNC_CALLOUT_NOHUP
))) {
2265 /*****************************************************************************/
2268 * Map in interrupt vector to this driver. Check that we don't
2269 * already have this vector mapped, we might be sharing this
2270 * interrupt across multiple boards.
2273 static int __init
stl_mapirq(int irq
, char *name
)
2278 printk("stl_mapirq(irq=%d,name=%s)\n", irq
, name
);
2282 for (i
= 0; (i
< stl_numintrs
); i
++) {
2283 if (stl_gotintrs
[i
] == irq
)
2286 if (i
>= stl_numintrs
) {
2287 if (request_irq(irq
, stl_intr
, SA_SHIRQ
, name
, NULL
) != 0) {
2288 printk("STALLION: failed to register interrupt "
2289 "routine for %s irq=%d\n", name
, irq
);
2292 stl_gotintrs
[stl_numintrs
++] = irq
;
2298 /*****************************************************************************/
2301 * Initialize all the ports on a panel.
2304 static int __init
stl_initports(stlbrd_t
*brdp
, stlpanel_t
*panelp
)
2310 printk("stl_initports(brdp=%x,panelp=%x)\n", (int) brdp
, (int) panelp
);
2313 chipmask
= stl_panelinit(brdp
, panelp
);
2316 * All UART's are initialized (if found!). Now go through and setup
2317 * each ports data structures.
2319 for (i
= 0; (i
< panelp
->nrports
); i
++) {
2320 portp
= (stlport_t
*) stl_memalloc(sizeof(stlport_t
));
2321 if (portp
== (stlport_t
*) NULL
) {
2322 printk("STALLION: failed to allocate memory "
2323 "(size=%d)\n", sizeof(stlport_t
));
2326 memset(portp
, 0, sizeof(stlport_t
));
2328 portp
->magic
= STL_PORTMAGIC
;
2330 portp
->brdnr
= panelp
->brdnr
;
2331 portp
->panelnr
= panelp
->panelnr
;
2332 portp
->uartp
= panelp
->uartp
;
2333 portp
->clk
= brdp
->clk
;
2334 portp
->baud_base
= STL_BAUDBASE
;
2335 portp
->close_delay
= STL_CLOSEDELAY
;
2336 portp
->closing_wait
= 30 * HZ
;
2337 portp
->normaltermios
= stl_deftermios
;
2338 portp
->callouttermios
= stl_deftermios
;
2339 portp
->tqueue
.routine
= stl_offintr
;
2340 portp
->tqueue
.data
= portp
;
2341 init_waitqueue_head(&portp
->open_wait
);
2342 init_waitqueue_head(&portp
->close_wait
);
2343 portp
->stats
.brd
= portp
->brdnr
;
2344 portp
->stats
.panel
= portp
->panelnr
;
2345 portp
->stats
.port
= portp
->portnr
;
2346 panelp
->ports
[i
] = portp
;
2347 stl_portinit(brdp
, panelp
, portp
);
2353 /*****************************************************************************/
2356 * Try to find and initialize an EasyIO board.
2359 static inline int stl_initeio(stlbrd_t
*brdp
)
2362 unsigned int status
;
2367 printk("stl_initeio(brdp=%x)\n", (int) brdp
);
2370 brdp
->ioctrl
= brdp
->ioaddr1
+ 1;
2371 brdp
->iostatus
= brdp
->ioaddr1
+ 2;
2373 status
= inb(brdp
->iostatus
);
2374 if ((status
& EIO_IDBITMASK
) == EIO_MK3
)
2378 * Handle board specific stuff now. The real difference is PCI
2381 if (brdp
->brdtype
== BRD_EASYIOPCI
) {
2382 brdp
->iosize1
= 0x80;
2383 brdp
->iosize2
= 0x80;
2384 name
= "serial(EIO-PCI)";
2385 outb(0x41, (brdp
->ioaddr2
+ 0x4c));
2388 name
= "serial(EIO)";
2389 if ((brdp
->irq
< 0) || (brdp
->irq
> 15) ||
2390 (stl_vecmap
[brdp
->irq
] == (unsigned char) 0xff)) {
2391 printk("STALLION: invalid irq=%d for brd=%d\n",
2392 brdp
->irq
, brdp
->brdnr
);
2395 outb((stl_vecmap
[brdp
->irq
] | EIO_0WS
|
2396 ((brdp
->irqtype
) ? EIO_INTLEVEL
: EIO_INTEDGE
)),
2400 if (check_region(brdp
->ioaddr1
, brdp
->iosize1
)) {
2401 printk("STALLION: Warning, board %d I/O address %x conflicts "
2402 "with another device\n", brdp
->brdnr
, brdp
->ioaddr1
);
2404 if (brdp
->iosize2
> 0) {
2405 if (check_region(brdp
->ioaddr2
, brdp
->iosize2
)) {
2406 printk("STALLION: Warning, board %d I/O address %x "
2407 "conflicts with another device\n",
2408 brdp
->brdnr
, brdp
->ioaddr2
);
2413 * Everything looks OK, so let's go ahead and probe for the hardware.
2415 brdp
->clk
= CD1400_CLK
;
2416 brdp
->isr
= stl_eiointr
;
2418 switch (status
& EIO_IDBITMASK
) {
2420 brdp
->clk
= CD1400_CLK8M
;
2430 switch (status
& EIO_BRDMASK
) {
2449 * We have verfied that the board is actually present, so now we
2450 * can complete the setup.
2452 request_region(brdp
->ioaddr1
, brdp
->iosize1
, name
);
2453 if (brdp
->iosize2
> 0)
2454 request_region(brdp
->ioaddr2
, brdp
->iosize2
, name
);
2456 panelp
= (stlpanel_t
*) stl_memalloc(sizeof(stlpanel_t
));
2457 if (panelp
== (stlpanel_t
*) NULL
) {
2458 printk("STALLION: failed to allocate memory (size=%d)\n",
2459 sizeof(stlpanel_t
));
2462 memset(panelp
, 0, sizeof(stlpanel_t
));
2464 panelp
->magic
= STL_PANELMAGIC
;
2465 panelp
->brdnr
= brdp
->brdnr
;
2466 panelp
->panelnr
= 0;
2467 panelp
->nrports
= brdp
->nrports
;
2468 panelp
->iobase
= brdp
->ioaddr1
;
2469 panelp
->hwid
= status
;
2470 if ((status
& EIO_IDBITMASK
) == EIO_MK3
) {
2471 panelp
->uartp
= (void *) &stl_sc26198uart
;
2472 panelp
->isr
= stl_sc26198intr
;
2474 panelp
->uartp
= (void *) &stl_cd1400uart
;
2475 panelp
->isr
= stl_cd1400eiointr
;
2478 brdp
->panels
[0] = panelp
;
2480 brdp
->state
|= BRD_FOUND
;
2481 brdp
->hwid
= status
;
2482 rc
= stl_mapirq(brdp
->irq
, name
);
2486 /*****************************************************************************/
2489 * Try to find an ECH board and initialize it. This code is capable of
2490 * dealing with all types of ECH board.
2493 static int inline stl_initech(stlbrd_t
*brdp
)
2496 unsigned int status
, nxtid
, ioaddr
, conflict
;
2497 int panelnr
, banknr
, i
;
2501 printk("stl_initech(brdp=%x)\n", (int) brdp
);
2508 * Set up the initial board register contents for boards. This varies a
2509 * bit between the different board types. So we need to handle each
2510 * separately. Also do a check that the supplied IRQ is good.
2512 switch (brdp
->brdtype
) {
2515 brdp
->isr
= stl_echatintr
;
2516 brdp
->ioctrl
= brdp
->ioaddr1
+ 1;
2517 brdp
->iostatus
= brdp
->ioaddr1
+ 1;
2518 status
= inb(brdp
->iostatus
);
2519 if ((status
& ECH_IDBITMASK
) != ECH_ID
)
2521 if ((brdp
->irq
< 0) || (brdp
->irq
> 15) ||
2522 (stl_vecmap
[brdp
->irq
] == (unsigned char) 0xff)) {
2523 printk("STALLION: invalid irq=%d for brd=%d\n",
2524 brdp
->irq
, brdp
->brdnr
);
2527 status
= ((brdp
->ioaddr2
& ECH_ADDR2MASK
) >> 1);
2528 status
|= (stl_vecmap
[brdp
->irq
] << 1);
2529 outb((status
| ECH_BRDRESET
), brdp
->ioaddr1
);
2530 brdp
->ioctrlval
= ECH_INTENABLE
|
2531 ((brdp
->irqtype
) ? ECH_INTLEVEL
: ECH_INTEDGE
);
2532 for (i
= 0; (i
< 10); i
++)
2533 outb((brdp
->ioctrlval
| ECH_BRDENABLE
), brdp
->ioctrl
);
2536 name
= "serial(EC8/32)";
2537 outb(status
, brdp
->ioaddr1
);
2541 brdp
->isr
= stl_echmcaintr
;
2542 brdp
->ioctrl
= brdp
->ioaddr1
+ 0x20;
2543 brdp
->iostatus
= brdp
->ioctrl
;
2544 status
= inb(brdp
->iostatus
);
2545 if ((status
& ECH_IDBITMASK
) != ECH_ID
)
2547 if ((brdp
->irq
< 0) || (brdp
->irq
> 15) ||
2548 (stl_vecmap
[brdp
->irq
] == (unsigned char) 0xff)) {
2549 printk("STALLION: invalid irq=%d for brd=%d\n",
2550 brdp
->irq
, brdp
->brdnr
);
2553 outb(ECHMC_BRDRESET
, brdp
->ioctrl
);
2554 outb(ECHMC_INTENABLE
, brdp
->ioctrl
);
2556 name
= "serial(EC8/32-MC)";
2560 brdp
->isr
= stl_echpciintr
;
2561 brdp
->ioctrl
= brdp
->ioaddr1
+ 2;
2564 name
= "serial(EC8/32-PCI)";
2568 brdp
->isr
= stl_echpci64intr
;
2569 brdp
->ioctrl
= brdp
->ioaddr2
+ 0x40;
2570 outb(0x43, (brdp
->ioaddr1
+ 0x4c));
2571 brdp
->iosize1
= 0x80;
2572 brdp
->iosize2
= 0x80;
2573 name
= "serial(EC8/64-PCI)";
2577 printk("STALLION: unknown board type=%d\n", brdp
->brdtype
);
2583 * Check boards for possible IO address conflicts. We won't actually
2584 * do anything about it here, just issue a warning...
2586 conflict
= check_region(brdp
->ioaddr1
, brdp
->iosize1
) ?
2588 if ((conflict
== 0) && (brdp
->iosize2
> 0))
2589 conflict
= check_region(brdp
->ioaddr2
, brdp
->iosize2
) ?
2592 printk("STALLION: Warning, board %d I/O address %x conflicts "
2593 "with another device\n", brdp
->brdnr
, conflict
);
2596 request_region(brdp
->ioaddr1
, brdp
->iosize1
, name
);
2597 if (brdp
->iosize2
> 0)
2598 request_region(brdp
->ioaddr2
, brdp
->iosize2
, name
);
2601 * Scan through the secondary io address space looking for panels.
2602 * As we find'em allocate and initialize panel structures for each.
2604 brdp
->clk
= CD1400_CLK
;
2605 brdp
->hwid
= status
;
2607 ioaddr
= brdp
->ioaddr2
;
2612 for (i
= 0; (i
< STL_MAXPANELS
); i
++) {
2613 if (brdp
->brdtype
== BRD_ECHPCI
) {
2614 outb(nxtid
, brdp
->ioctrl
);
2615 ioaddr
= brdp
->ioaddr2
;
2617 status
= inb(ioaddr
+ ECH_PNLSTATUS
);
2618 if ((status
& ECH_PNLIDMASK
) != nxtid
)
2620 panelp
= (stlpanel_t
*) stl_memalloc(sizeof(stlpanel_t
));
2621 if (panelp
== (stlpanel_t
*) NULL
) {
2622 printk("STALLION: failed to allocate memory "
2623 "(size=%d)\n", sizeof(stlpanel_t
));
2626 memset(panelp
, 0, sizeof(stlpanel_t
));
2627 panelp
->magic
= STL_PANELMAGIC
;
2628 panelp
->brdnr
= brdp
->brdnr
;
2629 panelp
->panelnr
= panelnr
;
2630 panelp
->iobase
= ioaddr
;
2631 panelp
->pagenr
= nxtid
;
2632 panelp
->hwid
= status
;
2633 brdp
->bnk2panel
[banknr
] = panelp
;
2634 brdp
->bnkpageaddr
[banknr
] = nxtid
;
2635 brdp
->bnkstataddr
[banknr
++] = ioaddr
+ ECH_PNLSTATUS
;
2637 if (status
& ECH_PNLXPID
) {
2638 panelp
->uartp
= (void *) &stl_sc26198uart
;
2639 panelp
->isr
= stl_sc26198intr
;
2640 if (status
& ECH_PNL16PORT
) {
2641 panelp
->nrports
= 16;
2642 brdp
->bnk2panel
[banknr
] = panelp
;
2643 brdp
->bnkpageaddr
[banknr
] = nxtid
;
2644 brdp
->bnkstataddr
[banknr
++] = ioaddr
+ 4 +
2647 panelp
->nrports
= 8;
2650 panelp
->uartp
= (void *) &stl_cd1400uart
;
2651 panelp
->isr
= stl_cd1400echintr
;
2652 if (status
& ECH_PNL16PORT
) {
2653 panelp
->nrports
= 16;
2654 panelp
->ackmask
= 0x80;
2655 if (brdp
->brdtype
!= BRD_ECHPCI
)
2656 ioaddr
+= EREG_BANKSIZE
;
2657 brdp
->bnk2panel
[banknr
] = panelp
;
2658 brdp
->bnkpageaddr
[banknr
] = ++nxtid
;
2659 brdp
->bnkstataddr
[banknr
++] = ioaddr
+
2662 panelp
->nrports
= 8;
2663 panelp
->ackmask
= 0xc0;
2668 ioaddr
+= EREG_BANKSIZE
;
2669 brdp
->nrports
+= panelp
->nrports
;
2670 brdp
->panels
[panelnr
++] = panelp
;
2671 if ((brdp
->brdtype
!= BRD_ECHPCI
) &&
2672 (ioaddr
>= (brdp
->ioaddr2
+ brdp
->iosize2
)))
2676 brdp
->nrpanels
= panelnr
;
2677 brdp
->nrbnks
= banknr
;
2678 if (brdp
->brdtype
== BRD_ECH
)
2679 outb((brdp
->ioctrlval
| ECH_BRDDISABLE
), brdp
->ioctrl
);
2681 brdp
->state
|= BRD_FOUND
;
2682 i
= stl_mapirq(brdp
->irq
, name
);
2686 /*****************************************************************************/
2689 * Initialize and configure the specified board.
2690 * Scan through all the boards in the configuration and see what we
2691 * can find. Handle EIO and the ECH boards a little differently here
2692 * since the initial search and setup is very different.
2695 static int __init
stl_brdinit(stlbrd_t
*brdp
)
2700 printk("stl_brdinit(brdp=%x)\n", (int) brdp
);
2703 switch (brdp
->brdtype
) {
2715 printk("STALLION: board=%d is unknown board type=%d\n",
2716 brdp
->brdnr
, brdp
->brdtype
);
2720 stl_brds
[brdp
->brdnr
] = brdp
;
2721 if ((brdp
->state
& BRD_FOUND
) == 0) {
2722 printk("STALLION: %s board not found, board=%d io=%x irq=%d\n",
2723 stl_brdnames
[brdp
->brdtype
], brdp
->brdnr
,
2724 brdp
->ioaddr1
, brdp
->irq
);
2728 for (i
= 0; (i
< STL_MAXPANELS
); i
++)
2729 if (brdp
->panels
[i
] != (stlpanel_t
*) NULL
)
2730 stl_initports(brdp
, brdp
->panels
[i
]);
2732 printk("STALLION: %s found, board=%d io=%x irq=%d "
2733 "nrpanels=%d nrports=%d\n", stl_brdnames
[brdp
->brdtype
],
2734 brdp
->brdnr
, brdp
->ioaddr1
, brdp
->irq
, brdp
->nrpanels
,
2739 /*****************************************************************************/
2742 * Find the next available board number that is free.
2745 static inline int stl_getbrdnr()
2749 for (i
= 0; (i
< STL_MAXBRDS
); i
++) {
2750 if (stl_brds
[i
] == (stlbrd_t
*) NULL
) {
2751 if (i
>= stl_nrbrds
)
2759 /*****************************************************************************/
2764 * We have a Stallion board. Allocate a board structure and
2765 * initialize it. Read its IO and IRQ resources from PCI
2766 * configuration space.
2769 static inline int stl_initpcibrd(int brdtype
, struct pci_dev
*devp
)
2774 printk("stl_initpcibrd(brdtype=%d,busnr=%x,devnr=%x)\n", brdtype
,
2775 devp
->bus
->number
, devp
->devfn
);
2778 if (pci_enable_device(devp
))
2780 if ((brdp
= stl_allocbrd()) == (stlbrd_t
*) NULL
)
2782 if ((brdp
->brdnr
= stl_getbrdnr()) < 0) {
2783 printk("STALLION: too many boards found, "
2784 "maximum supported %d\n", STL_MAXBRDS
);
2787 brdp
->brdtype
= brdtype
;
2790 * Different Stallion boards use the BAR registers in different ways,
2791 * so set up io addresses based on board type.
2794 printk("%s(%d): BAR[]=%x,%x,%x,%x IRQ=%x\n", __FILE__
, __LINE__
,
2795 pci_resource_start(devp
, 0), pci_resource_start(devp
, 1),
2796 pci_resource_start(devp
, 2), pci_resource_start(devp
, 3), devp
->irq
);
2800 * We have all resources from the board, so let's setup the actual
2801 * board structure now.
2805 brdp
->ioaddr2
= pci_resource_start(devp
, 0);
2806 brdp
->ioaddr1
= pci_resource_start(devp
, 1);
2809 brdp
->ioaddr2
= pci_resource_start(devp
, 2);
2810 brdp
->ioaddr1
= pci_resource_start(devp
, 1);
2813 brdp
->ioaddr1
= pci_resource_start(devp
, 2);
2814 brdp
->ioaddr2
= pci_resource_start(devp
, 1);
2817 printk("STALLION: unknown PCI board type=%d\n", brdtype
);
2821 brdp
->irq
= devp
->irq
;
2827 /*****************************************************************************/
2830 * Find all Stallion PCI boards that might be installed. Initialize each
2831 * one as it is found.
2835 static inline int stl_findpcibrds()
2837 struct pci_dev
*dev
= NULL
;
2841 printk("stl_findpcibrds()\n");
2844 if (! pci_present())
2847 for (i
= 0; (i
< stl_nrpcibrds
); i
++)
2848 while ((dev
= pci_find_device(stl_pcibrds
[i
].vendid
,
2849 stl_pcibrds
[i
].devid
, dev
))) {
2852 * Found a device on the PCI bus that has our vendor and
2853 * device ID. Need to check now that it is really us.
2855 if ((dev
->class >> 8) == PCI_CLASS_STORAGE_IDE
)
2858 rc
= stl_initpcibrd(stl_pcibrds
[i
].brdtype
, dev
);
2868 /*****************************************************************************/
2871 * Scan through all the boards in the configuration and see what we
2872 * can find. Handle EIO and the ECH boards a little differently here
2873 * since the initial search and setup is too different.
2876 static inline int stl_initbrds()
2883 printk("stl_initbrds()\n");
2886 if (stl_nrbrds
> STL_MAXBRDS
) {
2887 printk("STALLION: too many boards in configuration table, "
2888 "truncating to %d\n", STL_MAXBRDS
);
2889 stl_nrbrds
= STL_MAXBRDS
;
2893 * Firstly scan the list of static boards configured. Allocate
2894 * resources and initialize the boards as found.
2896 for (i
= 0; (i
< stl_nrbrds
); i
++) {
2897 confp
= &stl_brdconf
[i
];
2899 stl_parsebrd(confp
, stl_brdsp
[i
]);
2901 if ((brdp
= stl_allocbrd()) == (stlbrd_t
*) NULL
)
2904 brdp
->brdtype
= confp
->brdtype
;
2905 brdp
->ioaddr1
= confp
->ioaddr1
;
2906 brdp
->ioaddr2
= confp
->ioaddr2
;
2907 brdp
->irq
= confp
->irq
;
2908 brdp
->irqtype
= confp
->irqtype
;
2913 * Find any dynamically supported boards. That is via module load
2914 * line options or auto-detected on the PCI bus.
2926 /*****************************************************************************/
2929 * Return the board stats structure to user app.
2932 static int stl_getbrdstats(combrd_t
*bp
)
2938 copy_from_user(&stl_brdstats
, bp
, sizeof(combrd_t
));
2939 if (stl_brdstats
.brd
>= STL_MAXBRDS
)
2941 brdp
= stl_brds
[stl_brdstats
.brd
];
2942 if (brdp
== (stlbrd_t
*) NULL
)
2945 memset(&stl_brdstats
, 0, sizeof(combrd_t
));
2946 stl_brdstats
.brd
= brdp
->brdnr
;
2947 stl_brdstats
.type
= brdp
->brdtype
;
2948 stl_brdstats
.hwid
= brdp
->hwid
;
2949 stl_brdstats
.state
= brdp
->state
;
2950 stl_brdstats
.ioaddr
= brdp
->ioaddr1
;
2951 stl_brdstats
.ioaddr2
= brdp
->ioaddr2
;
2952 stl_brdstats
.irq
= brdp
->irq
;
2953 stl_brdstats
.nrpanels
= brdp
->nrpanels
;
2954 stl_brdstats
.nrports
= brdp
->nrports
;
2955 for (i
= 0; (i
< brdp
->nrpanels
); i
++) {
2956 panelp
= brdp
->panels
[i
];
2957 stl_brdstats
.panels
[i
].panel
= i
;
2958 stl_brdstats
.panels
[i
].hwid
= panelp
->hwid
;
2959 stl_brdstats
.panels
[i
].nrports
= panelp
->nrports
;
2962 copy_to_user(bp
, &stl_brdstats
, sizeof(combrd_t
));
2966 /*****************************************************************************/
2969 * Resolve the referenced port number into a port struct pointer.
2972 static stlport_t
*stl_getport(int brdnr
, int panelnr
, int portnr
)
2977 if ((brdnr
< 0) || (brdnr
>= STL_MAXBRDS
))
2978 return((stlport_t
*) NULL
);
2979 brdp
= stl_brds
[brdnr
];
2980 if (brdp
== (stlbrd_t
*) NULL
)
2981 return((stlport_t
*) NULL
);
2982 if ((panelnr
< 0) || (panelnr
>= brdp
->nrpanels
))
2983 return((stlport_t
*) NULL
);
2984 panelp
= brdp
->panels
[panelnr
];
2985 if (panelp
== (stlpanel_t
*) NULL
)
2986 return((stlport_t
*) NULL
);
2987 if ((portnr
< 0) || (portnr
>= panelp
->nrports
))
2988 return((stlport_t
*) NULL
);
2989 return(panelp
->ports
[portnr
]);
2992 /*****************************************************************************/
2995 * Return the port stats structure to user app. A NULL port struct
2996 * pointer passed in means that we need to find out from the app
2997 * what port to get stats for (used through board control device).
3000 static int stl_getportstats(stlport_t
*portp
, comstats_t
*cp
)
3002 unsigned char *head
, *tail
;
3003 unsigned long flags
;
3005 if (portp
== (stlport_t
*) NULL
) {
3006 copy_from_user(&stl_comstats
, cp
, sizeof(comstats_t
));
3007 portp
= stl_getport(stl_comstats
.brd
, stl_comstats
.panel
,
3009 if (portp
== (stlport_t
*) NULL
)
3013 portp
->stats
.state
= portp
->istate
;
3014 portp
->stats
.flags
= portp
->flags
;
3015 portp
->stats
.hwid
= portp
->hwid
;
3017 portp
->stats
.ttystate
= 0;
3018 portp
->stats
.cflags
= 0;
3019 portp
->stats
.iflags
= 0;
3020 portp
->stats
.oflags
= 0;
3021 portp
->stats
.lflags
= 0;
3022 portp
->stats
.rxbuffered
= 0;
3026 if (portp
->tty
!= (struct tty_struct
*) NULL
) {
3027 if (portp
->tty
->driver_data
== portp
) {
3028 portp
->stats
.ttystate
= portp
->tty
->flags
;
3029 portp
->stats
.rxbuffered
= portp
->tty
->flip
.count
;
3030 if (portp
->tty
->termios
!= (struct termios
*) NULL
) {
3031 portp
->stats
.cflags
= portp
->tty
->termios
->c_cflag
;
3032 portp
->stats
.iflags
= portp
->tty
->termios
->c_iflag
;
3033 portp
->stats
.oflags
= portp
->tty
->termios
->c_oflag
;
3034 portp
->stats
.lflags
= portp
->tty
->termios
->c_lflag
;
3038 restore_flags(flags
);
3040 head
= portp
->tx
.head
;
3041 tail
= portp
->tx
.tail
;
3042 portp
->stats
.txbuffered
= ((head
>= tail
) ? (head
- tail
) :
3043 (STL_TXBUFSIZE
- (tail
- head
)));
3045 portp
->stats
.signals
= (unsigned long) stl_getsignals(portp
);
3047 copy_to_user(cp
, &portp
->stats
, sizeof(comstats_t
));
3051 /*****************************************************************************/
3054 * Clear the port stats structure. We also return it zeroed out...
3057 static int stl_clrportstats(stlport_t
*portp
, comstats_t
*cp
)
3059 if (portp
== (stlport_t
*) NULL
) {
3060 copy_from_user(&stl_comstats
, cp
, sizeof(comstats_t
));
3061 portp
= stl_getport(stl_comstats
.brd
, stl_comstats
.panel
,
3063 if (portp
== (stlport_t
*) NULL
)
3067 memset(&portp
->stats
, 0, sizeof(comstats_t
));
3068 portp
->stats
.brd
= portp
->brdnr
;
3069 portp
->stats
.panel
= portp
->panelnr
;
3070 portp
->stats
.port
= portp
->portnr
;
3071 copy_to_user(cp
, &portp
->stats
, sizeof(comstats_t
));
3075 /*****************************************************************************/
3078 * Return the entire driver ports structure to a user app.
3081 static int stl_getportstruct(unsigned long arg
)
3085 copy_from_user(&stl_dummyport
, (void *) arg
, sizeof(stlport_t
));
3086 portp
= stl_getport(stl_dummyport
.brdnr
, stl_dummyport
.panelnr
,
3087 stl_dummyport
.portnr
);
3088 if (portp
== (stlport_t
*) NULL
)
3090 copy_to_user((void *) arg
, portp
, sizeof(stlport_t
));
3094 /*****************************************************************************/
3097 * Return the entire driver board structure to a user app.
3100 static int stl_getbrdstruct(unsigned long arg
)
3104 copy_from_user(&stl_dummybrd
, (void *) arg
, sizeof(stlbrd_t
));
3105 if ((stl_dummybrd
.brdnr
< 0) || (stl_dummybrd
.brdnr
>= STL_MAXBRDS
))
3107 brdp
= stl_brds
[stl_dummybrd
.brdnr
];
3108 if (brdp
== (stlbrd_t
*) NULL
)
3110 copy_to_user((void *) arg
, brdp
, sizeof(stlbrd_t
));
3114 /*****************************************************************************/
3117 * The "staliomem" device is also required to do some special operations
3118 * on the board and/or ports. In this driver it is mostly used for stats
3122 static int stl_memioctl(struct inode
*ip
, struct file
*fp
, unsigned int cmd
, unsigned long arg
)
3127 printk("stl_memioctl(ip=%x,fp=%x,cmd=%x,arg=%x)\n", (int) ip
,
3128 (int) fp
, cmd
, (int) arg
);
3131 brdnr
= MINOR(ip
->i_rdev
);
3132 if (brdnr
>= STL_MAXBRDS
)
3137 case COM_GETPORTSTATS
:
3138 if ((rc
= verify_area(VERIFY_WRITE
, (void *) arg
,
3139 sizeof(comstats_t
))) == 0)
3140 rc
= stl_getportstats((stlport_t
*) NULL
,
3141 (comstats_t
*) arg
);
3143 case COM_CLRPORTSTATS
:
3144 if ((rc
= verify_area(VERIFY_WRITE
, (void *) arg
,
3145 sizeof(comstats_t
))) == 0)
3146 rc
= stl_clrportstats((stlport_t
*) NULL
,
3147 (comstats_t
*) arg
);
3149 case COM_GETBRDSTATS
:
3150 if ((rc
= verify_area(VERIFY_WRITE
, (void *) arg
,
3151 sizeof(combrd_t
))) == 0)
3152 rc
= stl_getbrdstats((combrd_t
*) arg
);
3155 if ((rc
= verify_area(VERIFY_WRITE
, (void *) arg
,
3156 sizeof(stlport_t
))) == 0)
3157 rc
= stl_getportstruct(arg
);
3160 if ((rc
= verify_area(VERIFY_WRITE
, (void *) arg
,
3161 sizeof(stlbrd_t
))) == 0)
3162 rc
= stl_getbrdstruct(arg
);
3172 /*****************************************************************************/
3174 int __init
stl_init(void)
3176 printk(KERN_INFO
"%s: version %s\n", stl_drvtitle
, stl_drvversion
);
3181 * Allocate a temporary write buffer.
3183 stl_tmpwritebuf
= (char *) stl_memalloc(STL_TXBUFSIZE
);
3184 if (stl_tmpwritebuf
== (char *) NULL
)
3185 printk("STALLION: failed to allocate memory (size=%d)\n",
3189 * Set up a character driver for per board stuff. This is mainly used
3190 * to do stats ioctls on the ports.
3192 if (devfs_register_chrdev(STL_SIOMEMMAJOR
, "staliomem", &stl_fsiomem
))
3193 printk("STALLION: failed to register serial board device\n");
3194 devfs_handle
= devfs_mk_dir (NULL
, "staliomem", NULL
);
3195 devfs_register_series (devfs_handle
, "%u", 4, DEVFS_FL_DEFAULT
,
3197 S_IFCHR
| S_IRUSR
| S_IWUSR
,
3198 &stl_fsiomem
, NULL
);
3201 * Set up the tty driver structure and register us as a driver.
3202 * Also setup the callout tty device.
3204 memset(&stl_serial
, 0, sizeof(struct tty_driver
));
3205 stl_serial
.magic
= TTY_DRIVER_MAGIC
;
3206 stl_serial
.driver_name
= stl_drvname
;
3207 stl_serial
.name
= stl_serialname
;
3208 stl_serial
.major
= STL_SERIALMAJOR
;
3209 stl_serial
.minor_start
= 0;
3210 stl_serial
.num
= STL_MAXBRDS
* STL_MAXPORTS
;
3211 stl_serial
.type
= TTY_DRIVER_TYPE_SERIAL
;
3212 stl_serial
.subtype
= STL_DRVTYPSERIAL
;
3213 stl_serial
.init_termios
= stl_deftermios
;
3214 stl_serial
.flags
= TTY_DRIVER_REAL_RAW
;
3215 stl_serial
.refcount
= &stl_refcount
;
3216 stl_serial
.table
= stl_ttys
;
3217 stl_serial
.termios
= stl_termios
;
3218 stl_serial
.termios_locked
= stl_termioslocked
;
3220 stl_serial
.open
= stl_open
;
3221 stl_serial
.close
= stl_close
;
3222 stl_serial
.write
= stl_write
;
3223 stl_serial
.put_char
= stl_putchar
;
3224 stl_serial
.flush_chars
= stl_flushchars
;
3225 stl_serial
.write_room
= stl_writeroom
;
3226 stl_serial
.chars_in_buffer
= stl_charsinbuffer
;
3227 stl_serial
.ioctl
= stl_ioctl
;
3228 stl_serial
.set_termios
= stl_settermios
;
3229 stl_serial
.throttle
= stl_throttle
;
3230 stl_serial
.unthrottle
= stl_unthrottle
;
3231 stl_serial
.stop
= stl_stop
;
3232 stl_serial
.start
= stl_start
;
3233 stl_serial
.hangup
= stl_hangup
;
3234 stl_serial
.flush_buffer
= stl_flushbuffer
;
3235 stl_serial
.break_ctl
= stl_breakctl
;
3236 stl_serial
.wait_until_sent
= stl_waituntilsent
;
3237 stl_serial
.send_xchar
= stl_sendxchar
;
3238 stl_serial
.read_proc
= stl_readproc
;
3240 stl_callout
= stl_serial
;
3241 stl_callout
.name
= stl_calloutname
;
3242 stl_callout
.major
= STL_CALLOUTMAJOR
;
3243 stl_callout
.subtype
= STL_DRVTYPCALLOUT
;
3244 stl_callout
.read_proc
= 0;
3246 if (tty_register_driver(&stl_serial
))
3247 printk("STALLION: failed to register serial driver\n");
3248 if (tty_register_driver(&stl_callout
))
3249 printk("STALLION: failed to register callout driver\n");
3254 /*****************************************************************************/
3255 /* CD1400 HARDWARE FUNCTIONS */
3256 /*****************************************************************************/
3259 * These functions get/set/update the registers of the cd1400 UARTs.
3260 * Access to the cd1400 registers is via an address/data io port pair.
3261 * (Maybe should make this inline...)
3264 static int stl_cd1400getreg(stlport_t
*portp
, int regnr
)
3266 outb((regnr
+ portp
->uartaddr
), portp
->ioaddr
);
3267 return(inb(portp
->ioaddr
+ EREG_DATA
));
3270 static void stl_cd1400setreg(stlport_t
*portp
, int regnr
, int value
)
3272 outb((regnr
+ portp
->uartaddr
), portp
->ioaddr
);
3273 outb(value
, portp
->ioaddr
+ EREG_DATA
);
3276 static int stl_cd1400updatereg(stlport_t
*portp
, int regnr
, int value
)
3278 outb((regnr
+ portp
->uartaddr
), portp
->ioaddr
);
3279 if (inb(portp
->ioaddr
+ EREG_DATA
) != value
) {
3280 outb(value
, portp
->ioaddr
+ EREG_DATA
);
3286 /*****************************************************************************/
3289 * Inbitialize the UARTs in a panel. We don't care what sort of board
3290 * these ports are on - since the port io registers are almost
3291 * identical when dealing with ports.
3294 static int stl_cd1400panelinit(stlbrd_t
*brdp
, stlpanel_t
*panelp
)
3298 int nrchips
, uartaddr
, ioaddr
;
3301 printk("stl_panelinit(brdp=%x,panelp=%x)\n", (int) brdp
, (int) panelp
);
3304 BRDENABLE(panelp
->brdnr
, panelp
->pagenr
);
3307 * Check that each chip is present and started up OK.
3310 nrchips
= panelp
->nrports
/ CD1400_PORTS
;
3311 for (i
= 0; (i
< nrchips
); i
++) {
3312 if (brdp
->brdtype
== BRD_ECHPCI
) {
3313 outb((panelp
->pagenr
+ (i
>> 1)), brdp
->ioctrl
);
3314 ioaddr
= panelp
->iobase
;
3316 ioaddr
= panelp
->iobase
+ (EREG_BANKSIZE
* (i
>> 1));
3318 uartaddr
= (i
& 0x01) ? 0x080 : 0;
3319 outb((GFRCR
+ uartaddr
), ioaddr
);
3320 outb(0, (ioaddr
+ EREG_DATA
));
3321 outb((CCR
+ uartaddr
), ioaddr
);
3322 outb(CCR_RESETFULL
, (ioaddr
+ EREG_DATA
));
3323 outb(CCR_RESETFULL
, (ioaddr
+ EREG_DATA
));
3324 outb((GFRCR
+ uartaddr
), ioaddr
);
3325 for (j
= 0; (j
< CCR_MAXWAIT
); j
++) {
3326 if ((gfrcr
= inb(ioaddr
+ EREG_DATA
)) != 0)
3329 if ((j
>= CCR_MAXWAIT
) || (gfrcr
< 0x40) || (gfrcr
> 0x60)) {
3330 printk("STALLION: cd1400 not responding, "
3331 "brd=%d panel=%d chip=%d\n",
3332 panelp
->brdnr
, panelp
->panelnr
, i
);
3335 chipmask
|= (0x1 << i
);
3336 outb((PPR
+ uartaddr
), ioaddr
);
3337 outb(PPR_SCALAR
, (ioaddr
+ EREG_DATA
));
3340 BRDDISABLE(panelp
->brdnr
);
3344 /*****************************************************************************/
3347 * Initialize hardware specific port registers.
3350 static void stl_cd1400portinit(stlbrd_t
*brdp
, stlpanel_t
*panelp
, stlport_t
*portp
)
3353 printk("stl_cd1400portinit(brdp=%x,panelp=%x,portp=%x)\n",
3354 (int) brdp
, (int) panelp
, (int) portp
);
3357 if ((brdp
== (stlbrd_t
*) NULL
) || (panelp
== (stlpanel_t
*) NULL
) ||
3358 (portp
== (stlport_t
*) NULL
))
3361 portp
->ioaddr
= panelp
->iobase
+ (((brdp
->brdtype
== BRD_ECHPCI
) ||
3362 (portp
->portnr
< 8)) ? 0 : EREG_BANKSIZE
);
3363 portp
->uartaddr
= (portp
->portnr
& 0x04) << 5;
3364 portp
->pagenr
= panelp
->pagenr
+ (portp
->portnr
>> 3);
3366 BRDENABLE(portp
->brdnr
, portp
->pagenr
);
3367 stl_cd1400setreg(portp
, CAR
, (portp
->portnr
& 0x03));
3368 stl_cd1400setreg(portp
, LIVR
, (portp
->portnr
<< 3));
3369 portp
->hwid
= stl_cd1400getreg(portp
, GFRCR
);
3370 BRDDISABLE(portp
->brdnr
);
3373 /*****************************************************************************/
3376 * Wait for the command register to be ready. We will poll this,
3377 * since it won't usually take too long to be ready.
3380 static void stl_cd1400ccrwait(stlport_t
*portp
)
3384 for (i
= 0; (i
< CCR_MAXWAIT
); i
++) {
3385 if (stl_cd1400getreg(portp
, CCR
) == 0) {
3390 printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n",
3391 portp
->portnr
, portp
->panelnr
, portp
->brdnr
);
3394 /*****************************************************************************/
3397 * Set up the cd1400 registers for a port based on the termios port
3401 static void stl_cd1400setport(stlport_t
*portp
, struct termios
*tiosp
)
3404 unsigned long flags
;
3405 unsigned int clkdiv
, baudrate
;
3406 unsigned char cor1
, cor2
, cor3
;
3407 unsigned char cor4
, cor5
, ccr
;
3408 unsigned char srer
, sreron
, sreroff
;
3409 unsigned char mcor1
, mcor2
, rtpr
;
3410 unsigned char clk
, div
;
3426 brdp
= stl_brds
[portp
->brdnr
];
3427 if (brdp
== (stlbrd_t
*) NULL
)
3431 * Set up the RX char ignore mask with those RX error types we
3432 * can ignore. We can get the cd1400 to help us out a little here,
3433 * it will ignore parity errors and breaks for us.
3435 portp
->rxignoremsk
= 0;
3436 if (tiosp
->c_iflag
& IGNPAR
) {
3437 portp
->rxignoremsk
|= (ST_PARITY
| ST_FRAMING
| ST_OVERRUN
);
3438 cor1
|= COR1_PARIGNORE
;
3440 if (tiosp
->c_iflag
& IGNBRK
) {
3441 portp
->rxignoremsk
|= ST_BREAK
;
3442 cor4
|= COR4_IGNBRK
;
3445 portp
->rxmarkmsk
= ST_OVERRUN
;
3446 if (tiosp
->c_iflag
& (INPCK
| PARMRK
))
3447 portp
->rxmarkmsk
|= (ST_PARITY
| ST_FRAMING
);
3448 if (tiosp
->c_iflag
& BRKINT
)
3449 portp
->rxmarkmsk
|= ST_BREAK
;
3452 * Go through the char size, parity and stop bits and set all the
3453 * option register appropriately.
3455 switch (tiosp
->c_cflag
& CSIZE
) {
3470 if (tiosp
->c_cflag
& CSTOPB
)
3475 if (tiosp
->c_cflag
& PARENB
) {
3476 if (tiosp
->c_cflag
& PARODD
)
3477 cor1
|= (COR1_PARENB
| COR1_PARODD
);
3479 cor1
|= (COR1_PARENB
| COR1_PAREVEN
);
3481 cor1
|= COR1_PARNONE
;
3485 * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing
3486 * space for hardware flow control and the like. This should be set to
3487 * VMIN. Also here we will set the RX data timeout to 10ms - this should
3488 * really be based on VTIME.
3490 cor3
|= FIFO_RXTHRESHOLD
;
3494 * Calculate the baud rate timers. For now we will just assume that
3495 * the input and output baud are the same. Could have used a baud
3496 * table here, but this way we can generate virtually any baud rate
3499 baudrate
= tiosp
->c_cflag
& CBAUD
;
3500 if (baudrate
& CBAUDEX
) {
3501 baudrate
&= ~CBAUDEX
;
3502 if ((baudrate
< 1) || (baudrate
> 4))
3503 tiosp
->c_cflag
&= ~CBAUDEX
;
3507 baudrate
= stl_baudrates
[baudrate
];
3508 if ((tiosp
->c_cflag
& CBAUD
) == B38400
) {
3509 if ((portp
->flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_HI
)
3511 else if ((portp
->flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_VHI
)
3513 else if ((portp
->flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_SHI
)
3515 else if ((portp
->flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_WARP
)
3517 else if ((portp
->flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_CUST
)
3518 baudrate
= (portp
->baud_base
/ portp
->custom_divisor
);
3520 if (baudrate
> STL_CD1400MAXBAUD
)
3521 baudrate
= STL_CD1400MAXBAUD
;
3524 for (clk
= 0; (clk
< CD1400_NUMCLKS
); clk
++) {
3525 clkdiv
= ((portp
->clk
/ stl_cd1400clkdivs
[clk
]) / baudrate
);
3529 div
= (unsigned char) clkdiv
;
3533 * Check what form of modem signaling is required and set it up.
3535 if ((tiosp
->c_cflag
& CLOCAL
) == 0) {
3538 sreron
|= SRER_MODEM
;
3539 portp
->flags
|= ASYNC_CHECK_CD
;
3541 portp
->flags
&= ~ASYNC_CHECK_CD
;
3545 * Setup cd1400 enhanced modes if we can. In particular we want to
3546 * handle as much of the flow control as possible automatically. As
3547 * well as saving a few CPU cycles it will also greatly improve flow
3548 * control reliability.
3550 if (tiosp
->c_iflag
& IXON
) {
3553 if (tiosp
->c_iflag
& IXANY
)
3557 if (tiosp
->c_cflag
& CRTSCTS
) {
3559 mcor1
|= FIFO_RTSTHRESHOLD
;
3563 * All cd1400 register values calculated so go through and set
3568 printk("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3569 portp
->portnr
, portp
->panelnr
, portp
->brdnr
);
3570 printk(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n",
3571 cor1
, cor2
, cor3
, cor4
, cor5
);
3572 printk(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n",
3573 mcor1
, mcor2
, rtpr
, sreron
, sreroff
);
3574 printk(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk
, div
, clk
, div
);
3575 printk(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3576 tiosp
->c_cc
[VSTART
], tiosp
->c_cc
[VSTOP
],
3577 tiosp
->c_cc
[VSTART
], tiosp
->c_cc
[VSTOP
]);
3582 BRDENABLE(portp
->brdnr
, portp
->pagenr
);
3583 stl_cd1400setreg(portp
, CAR
, (portp
->portnr
& 0x3));
3584 srer
= stl_cd1400getreg(portp
, SRER
);
3585 stl_cd1400setreg(portp
, SRER
, 0);
3586 if (stl_cd1400updatereg(portp
, COR1
, cor1
))
3588 if (stl_cd1400updatereg(portp
, COR2
, cor2
))
3590 if (stl_cd1400updatereg(portp
, COR3
, cor3
))
3593 stl_cd1400ccrwait(portp
);
3594 stl_cd1400setreg(portp
, CCR
, CCR_CORCHANGE
);
3596 stl_cd1400setreg(portp
, COR4
, cor4
);
3597 stl_cd1400setreg(portp
, COR5
, cor5
);
3598 stl_cd1400setreg(portp
, MCOR1
, mcor1
);
3599 stl_cd1400setreg(portp
, MCOR2
, mcor2
);
3601 stl_cd1400setreg(portp
, TCOR
, clk
);
3602 stl_cd1400setreg(portp
, TBPR
, div
);
3603 stl_cd1400setreg(portp
, RCOR
, clk
);
3604 stl_cd1400setreg(portp
, RBPR
, div
);
3606 stl_cd1400setreg(portp
, SCHR1
, tiosp
->c_cc
[VSTART
]);
3607 stl_cd1400setreg(portp
, SCHR2
, tiosp
->c_cc
[VSTOP
]);
3608 stl_cd1400setreg(portp
, SCHR3
, tiosp
->c_cc
[VSTART
]);
3609 stl_cd1400setreg(portp
, SCHR4
, tiosp
->c_cc
[VSTOP
]);
3610 stl_cd1400setreg(portp
, RTPR
, rtpr
);
3611 mcor1
= stl_cd1400getreg(portp
, MSVR1
);
3612 if (mcor1
& MSVR1_DCD
)
3613 portp
->sigs
|= TIOCM_CD
;
3615 portp
->sigs
&= ~TIOCM_CD
;
3616 stl_cd1400setreg(portp
, SRER
, ((srer
& ~sreroff
) | sreron
));
3617 BRDDISABLE(portp
->brdnr
);
3618 restore_flags(flags
);
3621 /*****************************************************************************/
3624 * Set the state of the DTR and RTS signals.
3627 static void stl_cd1400setsignals(stlport_t
*portp
, int dtr
, int rts
)
3629 unsigned char msvr1
, msvr2
;
3630 unsigned long flags
;
3633 printk("stl_cd1400setsignals(portp=%x,dtr=%d,rts=%d)\n",
3634 (int) portp
, dtr
, rts
);
3646 BRDENABLE(portp
->brdnr
, portp
->pagenr
);
3647 stl_cd1400setreg(portp
, CAR
, (portp
->portnr
& 0x03));
3649 stl_cd1400setreg(portp
, MSVR2
, msvr2
);
3651 stl_cd1400setreg(portp
, MSVR1
, msvr1
);
3652 BRDDISABLE(portp
->brdnr
);
3653 restore_flags(flags
);
3656 /*****************************************************************************/
3659 * Return the state of the signals.
3662 static int stl_cd1400getsignals(stlport_t
*portp
)
3664 unsigned char msvr1
, msvr2
;
3665 unsigned long flags
;
3669 printk("stl_cd1400getsignals(portp=%x)\n", (int) portp
);
3674 BRDENABLE(portp
->brdnr
, portp
->pagenr
);
3675 stl_cd1400setreg(portp
, CAR
, (portp
->portnr
& 0x03));
3676 msvr1
= stl_cd1400getreg(portp
, MSVR1
);
3677 msvr2
= stl_cd1400getreg(portp
, MSVR2
);
3678 BRDDISABLE(portp
->brdnr
);
3679 restore_flags(flags
);
3682 sigs
|= (msvr1
& MSVR1_DCD
) ? TIOCM_CD
: 0;
3683 sigs
|= (msvr1
& MSVR1_CTS
) ? TIOCM_CTS
: 0;
3684 sigs
|= (msvr1
& MSVR1_DTR
) ? TIOCM_DTR
: 0;
3685 sigs
|= (msvr2
& MSVR2_RTS
) ? TIOCM_RTS
: 0;
3687 sigs
|= (msvr1
& MSVR1_RI
) ? TIOCM_RI
: 0;
3688 sigs
|= (msvr1
& MSVR1_DSR
) ? TIOCM_DSR
: 0;
3695 /*****************************************************************************/
3698 * Enable/Disable the Transmitter and/or Receiver.
3701 static void stl_cd1400enablerxtx(stlport_t
*portp
, int rx
, int tx
)
3704 unsigned long flags
;
3707 printk("stl_cd1400enablerxtx(portp=%x,rx=%d,tx=%d)\n",
3708 (int) portp
, rx
, tx
);
3713 ccr
|= CCR_TXDISABLE
;
3715 ccr
|= CCR_TXENABLE
;
3717 ccr
|= CCR_RXDISABLE
;
3719 ccr
|= CCR_RXENABLE
;
3723 BRDENABLE(portp
->brdnr
, portp
->pagenr
);
3724 stl_cd1400setreg(portp
, CAR
, (portp
->portnr
& 0x03));
3725 stl_cd1400ccrwait(portp
);
3726 stl_cd1400setreg(portp
, CCR
, ccr
);
3727 stl_cd1400ccrwait(portp
);
3728 BRDDISABLE(portp
->brdnr
);
3729 restore_flags(flags
);
3732 /*****************************************************************************/
3735 * Start/stop the Transmitter and/or Receiver.
3738 static void stl_cd1400startrxtx(stlport_t
*portp
, int rx
, int tx
)
3740 unsigned char sreron
, sreroff
;
3741 unsigned long flags
;
3744 printk("stl_cd1400startrxtx(portp=%x,rx=%d,tx=%d)\n",
3745 (int) portp
, rx
, tx
);
3751 sreroff
|= (SRER_TXDATA
| SRER_TXEMPTY
);
3753 sreron
|= SRER_TXDATA
;
3755 sreron
|= SRER_TXEMPTY
;
3757 sreroff
|= SRER_RXDATA
;
3759 sreron
|= SRER_RXDATA
;
3763 BRDENABLE(portp
->brdnr
, portp
->pagenr
);
3764 stl_cd1400setreg(portp
, CAR
, (portp
->portnr
& 0x03));
3765 stl_cd1400setreg(portp
, SRER
,
3766 ((stl_cd1400getreg(portp
, SRER
) & ~sreroff
) | sreron
));
3767 BRDDISABLE(portp
->brdnr
);
3769 set_bit(ASYI_TXBUSY
, &portp
->istate
);
3770 restore_flags(flags
);
3773 /*****************************************************************************/
3776 * Disable all interrupts from this port.
3779 static void stl_cd1400disableintrs(stlport_t
*portp
)
3781 unsigned long flags
;
3784 printk("stl_cd1400disableintrs(portp=%x)\n", (int) portp
);
3788 BRDENABLE(portp
->brdnr
, portp
->pagenr
);
3789 stl_cd1400setreg(portp
, CAR
, (portp
->portnr
& 0x03));
3790 stl_cd1400setreg(portp
, SRER
, 0);
3791 BRDDISABLE(portp
->brdnr
);
3792 restore_flags(flags
);
3795 /*****************************************************************************/
3797 static void stl_cd1400sendbreak(stlport_t
*portp
, int len
)
3799 unsigned long flags
;
3802 printk("stl_cd1400sendbreak(portp=%x,len=%d)\n", (int) portp
, len
);
3807 BRDENABLE(portp
->brdnr
, portp
->pagenr
);
3808 stl_cd1400setreg(portp
, CAR
, (portp
->portnr
& 0x03));
3809 stl_cd1400setreg(portp
, SRER
,
3810 ((stl_cd1400getreg(portp
, SRER
) & ~SRER_TXDATA
) |
3812 BRDDISABLE(portp
->brdnr
);
3813 portp
->brklen
= len
;
3815 portp
->stats
.txbreaks
++;
3816 restore_flags(flags
);
3819 /*****************************************************************************/
3822 * Take flow control actions...
3825 static void stl_cd1400flowctrl(stlport_t
*portp
, int state
)
3827 struct tty_struct
*tty
;
3828 unsigned long flags
;
3831 printk("stl_cd1400flowctrl(portp=%x,state=%x)\n", (int) portp
, state
);
3834 if (portp
== (stlport_t
*) NULL
)
3837 if (tty
== (struct tty_struct
*) NULL
)
3842 BRDENABLE(portp
->brdnr
, portp
->pagenr
);
3843 stl_cd1400setreg(portp
, CAR
, (portp
->portnr
& 0x03));
3846 if (tty
->termios
->c_iflag
& IXOFF
) {
3847 stl_cd1400ccrwait(portp
);
3848 stl_cd1400setreg(portp
, CCR
, CCR_SENDSCHR1
);
3849 portp
->stats
.rxxon
++;
3850 stl_cd1400ccrwait(portp
);
3853 * Question: should we return RTS to what it was before? It may
3854 * have been set by an ioctl... Suppose not, since if you have
3855 * hardware flow control set then it is pretty silly to go and
3856 * set the RTS line by hand.
3858 if (tty
->termios
->c_cflag
& CRTSCTS
) {
3859 stl_cd1400setreg(portp
, MCOR1
,
3860 (stl_cd1400getreg(portp
, MCOR1
) |
3861 FIFO_RTSTHRESHOLD
));
3862 stl_cd1400setreg(portp
, MSVR2
, MSVR2_RTS
);
3863 portp
->stats
.rxrtson
++;
3866 if (tty
->termios
->c_iflag
& IXOFF
) {
3867 stl_cd1400ccrwait(portp
);
3868 stl_cd1400setreg(portp
, CCR
, CCR_SENDSCHR2
);
3869 portp
->stats
.rxxoff
++;
3870 stl_cd1400ccrwait(portp
);
3872 if (tty
->termios
->c_cflag
& CRTSCTS
) {
3873 stl_cd1400setreg(portp
, MCOR1
,
3874 (stl_cd1400getreg(portp
, MCOR1
) & 0xf0));
3875 stl_cd1400setreg(portp
, MSVR2
, 0);
3876 portp
->stats
.rxrtsoff
++;
3880 BRDDISABLE(portp
->brdnr
);
3881 restore_flags(flags
);
3884 /*****************************************************************************/
3887 * Send a flow control character...
3890 static void stl_cd1400sendflow(stlport_t
*portp
, int state
)
3892 struct tty_struct
*tty
;
3893 unsigned long flags
;
3896 printk("stl_cd1400sendflow(portp=%x,state=%x)\n", (int) portp
, state
);
3899 if (portp
== (stlport_t
*) NULL
)
3902 if (tty
== (struct tty_struct
*) NULL
)
3907 BRDENABLE(portp
->brdnr
, portp
->pagenr
);
3908 stl_cd1400setreg(portp
, CAR
, (portp
->portnr
& 0x03));
3910 stl_cd1400ccrwait(portp
);
3911 stl_cd1400setreg(portp
, CCR
, CCR_SENDSCHR1
);
3912 portp
->stats
.rxxon
++;
3913 stl_cd1400ccrwait(portp
);
3915 stl_cd1400ccrwait(portp
);
3916 stl_cd1400setreg(portp
, CCR
, CCR_SENDSCHR2
);
3917 portp
->stats
.rxxoff
++;
3918 stl_cd1400ccrwait(portp
);
3920 BRDDISABLE(portp
->brdnr
);
3921 restore_flags(flags
);
3924 /*****************************************************************************/
3926 static void stl_cd1400flush(stlport_t
*portp
)
3928 unsigned long flags
;
3931 printk("stl_cd1400flush(portp=%x)\n", (int) portp
);
3934 if (portp
== (stlport_t
*) NULL
)
3939 BRDENABLE(portp
->brdnr
, portp
->pagenr
);
3940 stl_cd1400setreg(portp
, CAR
, (portp
->portnr
& 0x03));
3941 stl_cd1400ccrwait(portp
);
3942 stl_cd1400setreg(portp
, CCR
, CCR_TXFLUSHFIFO
);
3943 stl_cd1400ccrwait(portp
);
3944 portp
->tx
.tail
= portp
->tx
.head
;
3945 BRDDISABLE(portp
->brdnr
);
3946 restore_flags(flags
);
3949 /*****************************************************************************/
3952 * Return the current state of data flow on this port. This is only
3953 * really interresting when determining if data has fully completed
3954 * transmission or not... This is easy for the cd1400, it accurately
3955 * maintains the busy port flag.
3958 static int stl_cd1400datastate(stlport_t
*portp
)
3961 printk("stl_cd1400datastate(portp=%x)\n", (int) portp
);
3964 if (portp
== (stlport_t
*) NULL
)
3967 return(test_bit(ASYI_TXBUSY
, &portp
->istate
) ? 1 : 0);
3970 /*****************************************************************************/
3973 * Interrupt service routine for cd1400 EasyIO boards.
3976 static void stl_cd1400eiointr(stlpanel_t
*panelp
, unsigned int iobase
)
3978 unsigned char svrtype
;
3981 printk("stl_cd1400eiointr(panelp=%x,iobase=%x)\n",
3982 (int) panelp
, iobase
);
3986 svrtype
= inb(iobase
+ EREG_DATA
);
3987 if (panelp
->nrports
> 4) {
3988 outb((SVRR
+ 0x80), iobase
);
3989 svrtype
|= inb(iobase
+ EREG_DATA
);
3992 if (svrtype
& SVRR_RX
)
3993 stl_cd1400rxisr(panelp
, iobase
);
3994 else if (svrtype
& SVRR_TX
)
3995 stl_cd1400txisr(panelp
, iobase
);
3996 else if (svrtype
& SVRR_MDM
)
3997 stl_cd1400mdmisr(panelp
, iobase
);
4000 /*****************************************************************************/
4003 * Interrupt service routine for cd1400 panels.
4006 static void stl_cd1400echintr(stlpanel_t
*panelp
, unsigned int iobase
)
4008 unsigned char svrtype
;
4011 printk("stl_cd1400echintr(panelp=%x,iobase=%x)\n", (int) panelp
,
4016 svrtype
= inb(iobase
+ EREG_DATA
);
4017 outb((SVRR
+ 0x80), iobase
);
4018 svrtype
|= inb(iobase
+ EREG_DATA
);
4019 if (svrtype
& SVRR_RX
)
4020 stl_cd1400rxisr(panelp
, iobase
);
4021 else if (svrtype
& SVRR_TX
)
4022 stl_cd1400txisr(panelp
, iobase
);
4023 else if (svrtype
& SVRR_MDM
)
4024 stl_cd1400mdmisr(panelp
, iobase
);
4028 /*****************************************************************************/
4031 * Unfortunately we need to handle breaks in the TX data stream, since
4032 * this is the only way to generate them on the cd1400.
4035 static inline int stl_cd1400breakisr(stlport_t
*portp
, int ioaddr
)
4037 if (portp
->brklen
== 1) {
4038 outb((COR2
+ portp
->uartaddr
), ioaddr
);
4039 outb((inb(ioaddr
+ EREG_DATA
) | COR2_ETC
),
4040 (ioaddr
+ EREG_DATA
));
4041 outb((TDR
+ portp
->uartaddr
), ioaddr
);
4042 outb(ETC_CMD
, (ioaddr
+ EREG_DATA
));
4043 outb(ETC_STARTBREAK
, (ioaddr
+ EREG_DATA
));
4044 outb((SRER
+ portp
->uartaddr
), ioaddr
);
4045 outb((inb(ioaddr
+ EREG_DATA
) & ~(SRER_TXDATA
| SRER_TXEMPTY
)),
4046 (ioaddr
+ EREG_DATA
));
4048 } else if (portp
->brklen
> 1) {
4049 outb((TDR
+ portp
->uartaddr
), ioaddr
);
4050 outb(ETC_CMD
, (ioaddr
+ EREG_DATA
));
4051 outb(ETC_STOPBREAK
, (ioaddr
+ EREG_DATA
));
4055 outb((COR2
+ portp
->uartaddr
), ioaddr
);
4056 outb((inb(ioaddr
+ EREG_DATA
) & ~COR2_ETC
),
4057 (ioaddr
+ EREG_DATA
));
4063 /*****************************************************************************/
4066 * Transmit interrupt handler. This has gotta be fast! Handling TX
4067 * chars is pretty simple, stuff as many as possible from the TX buffer
4068 * into the cd1400 FIFO. Must also handle TX breaks here, since they
4069 * are embedded as commands in the data stream. Oh no, had to use a goto!
4070 * This could be optimized more, will do when I get time...
4071 * In practice it is possible that interrupts are enabled but that the
4072 * port has been hung up. Need to handle not having any TX buffer here,
4073 * this is done by using the side effect that head and tail will also
4074 * be NULL if the buffer has been freed.
4077 static void stl_cd1400txisr(stlpanel_t
*panelp
, int ioaddr
)
4082 unsigned char ioack
, srer
;
4085 printk("stl_cd1400txisr(panelp=%x,ioaddr=%x)\n", (int) panelp
, ioaddr
);
4088 ioack
= inb(ioaddr
+ EREG_TXACK
);
4089 if (((ioack
& panelp
->ackmask
) != 0) ||
4090 ((ioack
& ACK_TYPMASK
) != ACK_TYPTX
)) {
4091 printk("STALLION: bad TX interrupt ack value=%x\n", ioack
);
4094 portp
= panelp
->ports
[(ioack
>> 3)];
4097 * Unfortunately we need to handle breaks in the data stream, since
4098 * this is the only way to generate them on the cd1400. Do it now if
4099 * a break is to be sent.
4101 if (portp
->brklen
!= 0)
4102 if (stl_cd1400breakisr(portp
, ioaddr
))
4105 head
= portp
->tx
.head
;
4106 tail
= portp
->tx
.tail
;
4107 len
= (head
>= tail
) ? (head
- tail
) : (STL_TXBUFSIZE
- (tail
- head
));
4108 if ((len
== 0) || ((len
< STL_TXBUFLOW
) &&
4109 (test_bit(ASYI_TXLOW
, &portp
->istate
) == 0))) {
4110 set_bit(ASYI_TXLOW
, &portp
->istate
);
4111 queue_task(&portp
->tqueue
, &tq_scheduler
);
4115 outb((SRER
+ portp
->uartaddr
), ioaddr
);
4116 srer
= inb(ioaddr
+ EREG_DATA
);
4117 if (srer
& SRER_TXDATA
) {
4118 srer
= (srer
& ~SRER_TXDATA
) | SRER_TXEMPTY
;
4120 srer
&= ~(SRER_TXDATA
| SRER_TXEMPTY
);
4121 clear_bit(ASYI_TXBUSY
, &portp
->istate
);
4123 outb(srer
, (ioaddr
+ EREG_DATA
));
4125 len
= MIN(len
, CD1400_TXFIFOSIZE
);
4126 portp
->stats
.txtotal
+= len
;
4127 stlen
= MIN(len
, ((portp
->tx
.buf
+ STL_TXBUFSIZE
) - tail
));
4128 outb((TDR
+ portp
->uartaddr
), ioaddr
);
4129 outsb((ioaddr
+ EREG_DATA
), tail
, stlen
);
4132 if (tail
>= (portp
->tx
.buf
+ STL_TXBUFSIZE
))
4133 tail
= portp
->tx
.buf
;
4135 outsb((ioaddr
+ EREG_DATA
), tail
, len
);
4138 portp
->tx
.tail
= tail
;
4142 outb((EOSRR
+ portp
->uartaddr
), ioaddr
);
4143 outb(0, (ioaddr
+ EREG_DATA
));
4146 /*****************************************************************************/
4149 * Receive character interrupt handler. Determine if we have good chars
4150 * or bad chars and then process appropriately. Good chars are easy
4151 * just shove the lot into the RX buffer and set all status byte to 0.
4152 * If a bad RX char then process as required. This routine needs to be
4153 * fast! In practice it is possible that we get an interrupt on a port
4154 * that is closed. This can happen on hangups - since they completely
4155 * shutdown a port not in user context. Need to handle this case.
4158 static void stl_cd1400rxisr(stlpanel_t
*panelp
, int ioaddr
)
4161 struct tty_struct
*tty
;
4162 unsigned int ioack
, len
, buflen
;
4163 unsigned char status
;
4167 printk("stl_cd1400rxisr(panelp=%x,ioaddr=%x)\n", (int) panelp
, ioaddr
);
4170 ioack
= inb(ioaddr
+ EREG_RXACK
);
4171 if ((ioack
& panelp
->ackmask
) != 0) {
4172 printk("STALLION: bad RX interrupt ack value=%x\n", ioack
);
4175 portp
= panelp
->ports
[(ioack
>> 3)];
4178 if ((ioack
& ACK_TYPMASK
) == ACK_TYPRXGOOD
) {
4179 outb((RDCR
+ portp
->uartaddr
), ioaddr
);
4180 len
= inb(ioaddr
+ EREG_DATA
);
4181 if ((tty
== (struct tty_struct
*) NULL
) ||
4182 (tty
->flip
.char_buf_ptr
== (char *) NULL
) ||
4183 ((buflen
= TTY_FLIPBUF_SIZE
- tty
->flip
.count
) == 0)) {
4184 len
= MIN(len
, sizeof(stl_unwanted
));
4185 outb((RDSR
+ portp
->uartaddr
), ioaddr
);
4186 insb((ioaddr
+ EREG_DATA
), &stl_unwanted
[0], len
);
4187 portp
->stats
.rxlost
+= len
;
4188 portp
->stats
.rxtotal
+= len
;
4190 len
= MIN(len
, buflen
);
4192 outb((RDSR
+ portp
->uartaddr
), ioaddr
);
4193 insb((ioaddr
+ EREG_DATA
), tty
->flip
.char_buf_ptr
, len
);
4194 memset(tty
->flip
.flag_buf_ptr
, 0, len
);
4195 tty
->flip
.flag_buf_ptr
+= len
;
4196 tty
->flip
.char_buf_ptr
+= len
;
4197 tty
->flip
.count
+= len
;
4198 tty_schedule_flip(tty
);
4199 portp
->stats
.rxtotal
+= len
;
4202 } else if ((ioack
& ACK_TYPMASK
) == ACK_TYPRXBAD
) {
4203 outb((RDSR
+ portp
->uartaddr
), ioaddr
);
4204 status
= inb(ioaddr
+ EREG_DATA
);
4205 ch
= inb(ioaddr
+ EREG_DATA
);
4206 if (status
& ST_PARITY
)
4207 portp
->stats
.rxparity
++;
4208 if (status
& ST_FRAMING
)
4209 portp
->stats
.rxframing
++;
4210 if (status
& ST_OVERRUN
)
4211 portp
->stats
.rxoverrun
++;
4212 if (status
& ST_BREAK
)
4213 portp
->stats
.rxbreaks
++;
4214 if (status
& ST_SCHARMASK
) {
4215 if ((status
& ST_SCHARMASK
) == ST_SCHAR1
)
4216 portp
->stats
.txxon
++;
4217 if ((status
& ST_SCHARMASK
) == ST_SCHAR2
)
4218 portp
->stats
.txxoff
++;
4221 if ((tty
!= (struct tty_struct
*) NULL
) &&
4222 ((portp
->rxignoremsk
& status
) == 0)) {
4223 if (portp
->rxmarkmsk
& status
) {
4224 if (status
& ST_BREAK
) {
4226 if (portp
->flags
& ASYNC_SAK
) {
4228 BRDENABLE(portp
->brdnr
, portp
->pagenr
);
4230 } else if (status
& ST_PARITY
) {
4231 status
= TTY_PARITY
;
4232 } else if (status
& ST_FRAMING
) {
4234 } else if(status
& ST_OVERRUN
) {
4235 status
= TTY_OVERRUN
;
4242 if (tty
->flip
.char_buf_ptr
!= (char *) NULL
) {
4243 if (tty
->flip
.count
< TTY_FLIPBUF_SIZE
) {
4244 *tty
->flip
.flag_buf_ptr
++ = status
;
4245 *tty
->flip
.char_buf_ptr
++ = ch
;
4248 tty_schedule_flip(tty
);
4252 printk("STALLION: bad RX interrupt ack value=%x\n", ioack
);
4257 outb((EOSRR
+ portp
->uartaddr
), ioaddr
);
4258 outb(0, (ioaddr
+ EREG_DATA
));
4261 /*****************************************************************************/
4264 * Modem interrupt handler. The is called when the modem signal line
4265 * (DCD) has changed state. Leave most of the work to the off-level
4266 * processing routine.
4269 static void stl_cd1400mdmisr(stlpanel_t
*panelp
, int ioaddr
)
4276 printk("stl_cd1400mdmisr(panelp=%x)\n", (int) panelp
);
4279 ioack
= inb(ioaddr
+ EREG_MDACK
);
4280 if (((ioack
& panelp
->ackmask
) != 0) ||
4281 ((ioack
& ACK_TYPMASK
) != ACK_TYPMDM
)) {
4282 printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack
);
4285 portp
= panelp
->ports
[(ioack
>> 3)];
4287 outb((MISR
+ portp
->uartaddr
), ioaddr
);
4288 misr
= inb(ioaddr
+ EREG_DATA
);
4289 if (misr
& MISR_DCD
) {
4290 set_bit(ASYI_DCDCHANGE
, &portp
->istate
);
4291 queue_task(&portp
->tqueue
, &tq_scheduler
);
4292 portp
->stats
.modem
++;
4295 outb((EOSRR
+ portp
->uartaddr
), ioaddr
);
4296 outb(0, (ioaddr
+ EREG_DATA
));
4299 /*****************************************************************************/
4300 /* SC26198 HARDWARE FUNCTIONS */
4301 /*****************************************************************************/
4304 * These functions get/set/update the registers of the sc26198 UARTs.
4305 * Access to the sc26198 registers is via an address/data io port pair.
4306 * (Maybe should make this inline...)
4309 static int stl_sc26198getreg(stlport_t
*portp
, int regnr
)
4311 outb((regnr
| portp
->uartaddr
), (portp
->ioaddr
+ XP_ADDR
));
4312 return(inb(portp
->ioaddr
+ XP_DATA
));
4315 static void stl_sc26198setreg(stlport_t
*portp
, int regnr
, int value
)
4317 outb((regnr
| portp
->uartaddr
), (portp
->ioaddr
+ XP_ADDR
));
4318 outb(value
, (portp
->ioaddr
+ XP_DATA
));
4321 static int stl_sc26198updatereg(stlport_t
*portp
, int regnr
, int value
)
4323 outb((regnr
| portp
->uartaddr
), (portp
->ioaddr
+ XP_ADDR
));
4324 if (inb(portp
->ioaddr
+ XP_DATA
) != value
) {
4325 outb(value
, (portp
->ioaddr
+ XP_DATA
));
4331 /*****************************************************************************/
4334 * Functions to get and set the sc26198 global registers.
4337 static int stl_sc26198getglobreg(stlport_t
*portp
, int regnr
)
4339 outb(regnr
, (portp
->ioaddr
+ XP_ADDR
));
4340 return(inb(portp
->ioaddr
+ XP_DATA
));
4344 static void stl_sc26198setglobreg(stlport_t
*portp
, int regnr
, int value
)
4346 outb(regnr
, (portp
->ioaddr
+ XP_ADDR
));
4347 outb(value
, (portp
->ioaddr
+ XP_DATA
));
4351 /*****************************************************************************/
4354 * Inbitialize the UARTs in a panel. We don't care what sort of board
4355 * these ports are on - since the port io registers are almost
4356 * identical when dealing with ports.
4359 static int stl_sc26198panelinit(stlbrd_t
*brdp
, stlpanel_t
*panelp
)
4362 int nrchips
, ioaddr
;
4365 printk("stl_sc26198panelinit(brdp=%x,panelp=%x)\n",
4366 (int) brdp
, (int) panelp
);
4369 BRDENABLE(panelp
->brdnr
, panelp
->pagenr
);
4372 * Check that each chip is present and started up OK.
4375 nrchips
= (panelp
->nrports
+ 4) / SC26198_PORTS
;
4376 if (brdp
->brdtype
== BRD_ECHPCI
)
4377 outb(panelp
->pagenr
, brdp
->ioctrl
);
4379 for (i
= 0; (i
< nrchips
); i
++) {
4380 ioaddr
= panelp
->iobase
+ (i
* 4);
4381 outb(SCCR
, (ioaddr
+ XP_ADDR
));
4382 outb(CR_RESETALL
, (ioaddr
+ XP_DATA
));
4383 outb(TSTR
, (ioaddr
+ XP_ADDR
));
4384 if (inb(ioaddr
+ XP_DATA
) != 0) {
4385 printk("STALLION: sc26198 not responding, "
4386 "brd=%d panel=%d chip=%d\n",
4387 panelp
->brdnr
, panelp
->panelnr
, i
);
4390 chipmask
|= (0x1 << i
);
4391 outb(GCCR
, (ioaddr
+ XP_ADDR
));
4392 outb(GCCR_IVRTYPCHANACK
, (ioaddr
+ XP_DATA
));
4393 outb(WDTRCR
, (ioaddr
+ XP_ADDR
));
4394 outb(0xff, (ioaddr
+ XP_DATA
));
4397 BRDDISABLE(panelp
->brdnr
);
4401 /*****************************************************************************/
4404 * Initialize hardware specific port registers.
4407 static void stl_sc26198portinit(stlbrd_t
*brdp
, stlpanel_t
*panelp
, stlport_t
*portp
)
4410 printk("stl_sc26198portinit(brdp=%x,panelp=%x,portp=%x)\n",
4411 (int) brdp
, (int) panelp
, (int) portp
);
4414 if ((brdp
== (stlbrd_t
*) NULL
) || (panelp
== (stlpanel_t
*) NULL
) ||
4415 (portp
== (stlport_t
*) NULL
))
4418 portp
->ioaddr
= panelp
->iobase
+ ((portp
->portnr
< 8) ? 0 : 4);
4419 portp
->uartaddr
= (portp
->portnr
& 0x07) << 4;
4420 portp
->pagenr
= panelp
->pagenr
;
4423 BRDENABLE(portp
->brdnr
, portp
->pagenr
);
4424 stl_sc26198setreg(portp
, IOPCR
, IOPCR_SETSIGS
);
4425 BRDDISABLE(portp
->brdnr
);
4428 /*****************************************************************************/
4431 * Set up the sc26198 registers for a port based on the termios port
4435 static void stl_sc26198setport(stlport_t
*portp
, struct termios
*tiosp
)
4438 unsigned long flags
;
4439 unsigned int baudrate
;
4440 unsigned char mr0
, mr1
, mr2
, clk
;
4441 unsigned char imron
, imroff
, iopr
, ipr
;
4451 brdp
= stl_brds
[portp
->brdnr
];
4452 if (brdp
== (stlbrd_t
*) NULL
)
4456 * Set up the RX char ignore mask with those RX error types we
4459 portp
->rxignoremsk
= 0;
4460 if (tiosp
->c_iflag
& IGNPAR
)
4461 portp
->rxignoremsk
|= (SR_RXPARITY
| SR_RXFRAMING
|
4463 if (tiosp
->c_iflag
& IGNBRK
)
4464 portp
->rxignoremsk
|= SR_RXBREAK
;
4466 portp
->rxmarkmsk
= SR_RXOVERRUN
;
4467 if (tiosp
->c_iflag
& (INPCK
| PARMRK
))
4468 portp
->rxmarkmsk
|= (SR_RXPARITY
| SR_RXFRAMING
);
4469 if (tiosp
->c_iflag
& BRKINT
)
4470 portp
->rxmarkmsk
|= SR_RXBREAK
;
4473 * Go through the char size, parity and stop bits and set all the
4474 * option register appropriately.
4476 switch (tiosp
->c_cflag
& CSIZE
) {
4491 if (tiosp
->c_cflag
& CSTOPB
)
4496 if (tiosp
->c_cflag
& PARENB
) {
4497 if (tiosp
->c_cflag
& PARODD
)
4498 mr1
|= (MR1_PARENB
| MR1_PARODD
);
4500 mr1
|= (MR1_PARENB
| MR1_PAREVEN
);
4505 mr1
|= MR1_ERRBLOCK
;
4508 * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing
4509 * space for hardware flow control and the like. This should be set to
4512 mr2
|= MR2_RXFIFOHALF
;
4515 * Calculate the baud rate timers. For now we will just assume that
4516 * the input and output baud are the same. The sc26198 has a fixed
4517 * baud rate table, so only discrete baud rates possible.
4519 baudrate
= tiosp
->c_cflag
& CBAUD
;
4520 if (baudrate
& CBAUDEX
) {
4521 baudrate
&= ~CBAUDEX
;
4522 if ((baudrate
< 1) || (baudrate
> 4))
4523 tiosp
->c_cflag
&= ~CBAUDEX
;
4527 baudrate
= stl_baudrates
[baudrate
];
4528 if ((tiosp
->c_cflag
& CBAUD
) == B38400
) {
4529 if ((portp
->flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_HI
)
4531 else if ((portp
->flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_VHI
)
4533 else if ((portp
->flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_SHI
)
4535 else if ((portp
->flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_WARP
)
4537 else if ((portp
->flags
& ASYNC_SPD_MASK
) == ASYNC_SPD_CUST
)
4538 baudrate
= (portp
->baud_base
/ portp
->custom_divisor
);
4540 if (baudrate
> STL_SC26198MAXBAUD
)
4541 baudrate
= STL_SC26198MAXBAUD
;
4544 for (clk
= 0; (clk
< SC26198_NRBAUDS
); clk
++) {
4545 if (baudrate
<= sc26198_baudtable
[clk
])
4551 * Check what form of modem signaling is required and set it up.
4553 if (tiosp
->c_cflag
& CLOCAL
) {
4554 portp
->flags
&= ~ASYNC_CHECK_CD
;
4556 iopr
|= IOPR_DCDCOS
;
4558 portp
->flags
|= ASYNC_CHECK_CD
;
4562 * Setup sc26198 enhanced modes if we can. In particular we want to
4563 * handle as much of the flow control as possible automatically. As
4564 * well as saving a few CPU cycles it will also greatly improve flow
4565 * control reliability.
4567 if (tiosp
->c_iflag
& IXON
) {
4568 mr0
|= MR0_SWFTX
| MR0_SWFT
;
4569 imron
|= IR_XONXOFF
;
4571 imroff
|= IR_XONXOFF
;
4573 if (tiosp
->c_iflag
& IXOFF
)
4576 if (tiosp
->c_cflag
& CRTSCTS
) {
4582 * All sc26198 register values calculated so go through and set
4587 printk("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
4588 portp
->portnr
, portp
->panelnr
, portp
->brdnr
);
4589 printk(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0
, mr1
, mr2
, clk
);
4590 printk(" iopr=%x imron=%x imroff=%x\n", iopr
, imron
, imroff
);
4591 printk(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
4592 tiosp
->c_cc
[VSTART
], tiosp
->c_cc
[VSTOP
],
4593 tiosp
->c_cc
[VSTART
], tiosp
->c_cc
[VSTOP
]);
4598 BRDENABLE(portp
->brdnr
, portp
->pagenr
);
4599 stl_sc26198setreg(portp
, IMR
, 0);
4600 stl_sc26198updatereg(portp
, MR0
, mr0
);
4601 stl_sc26198updatereg(portp
, MR1
, mr1
);
4602 stl_sc26198setreg(portp
, SCCR
, CR_RXERRBLOCK
);
4603 stl_sc26198updatereg(portp
, MR2
, mr2
);
4604 stl_sc26198updatereg(portp
, IOPIOR
,
4605 ((stl_sc26198getreg(portp
, IOPIOR
) & ~IPR_CHANGEMASK
) | iopr
));
4608 stl_sc26198setreg(portp
, TXCSR
, clk
);
4609 stl_sc26198setreg(portp
, RXCSR
, clk
);
4612 stl_sc26198setreg(portp
, XONCR
, tiosp
->c_cc
[VSTART
]);
4613 stl_sc26198setreg(portp
, XOFFCR
, tiosp
->c_cc
[VSTOP
]);
4615 ipr
= stl_sc26198getreg(portp
, IPR
);
4617 portp
->sigs
&= ~TIOCM_CD
;
4619 portp
->sigs
|= TIOCM_CD
;
4621 portp
->imr
= (portp
->imr
& ~imroff
) | imron
;
4622 stl_sc26198setreg(portp
, IMR
, portp
->imr
);
4623 BRDDISABLE(portp
->brdnr
);
4624 restore_flags(flags
);
4627 /*****************************************************************************/
4630 * Set the state of the DTR and RTS signals.
4633 static void stl_sc26198setsignals(stlport_t
*portp
, int dtr
, int rts
)
4635 unsigned char iopioron
, iopioroff
;
4636 unsigned long flags
;
4639 printk("stl_sc26198setsignals(portp=%x,dtr=%d,rts=%d)\n",
4640 (int) portp
, dtr
, rts
);
4646 iopioroff
|= IPR_DTR
;
4648 iopioron
|= IPR_DTR
;
4650 iopioroff
|= IPR_RTS
;
4652 iopioron
|= IPR_RTS
;
4656 BRDENABLE(portp
->brdnr
, portp
->pagenr
);
4657 stl_sc26198setreg(portp
, IOPIOR
,
4658 ((stl_sc26198getreg(portp
, IOPIOR
) & ~iopioroff
) | iopioron
));
4659 BRDDISABLE(portp
->brdnr
);
4660 restore_flags(flags
);
4663 /*****************************************************************************/
4666 * Return the state of the signals.
4669 static int stl_sc26198getsignals(stlport_t
*portp
)
4672 unsigned long flags
;
4676 printk("stl_sc26198getsignals(portp=%x)\n", (int) portp
);
4681 BRDENABLE(portp
->brdnr
, portp
->pagenr
);
4682 ipr
= stl_sc26198getreg(portp
, IPR
);
4683 BRDDISABLE(portp
->brdnr
);
4684 restore_flags(flags
);
4687 sigs
|= (ipr
& IPR_DCD
) ? 0 : TIOCM_CD
;
4688 sigs
|= (ipr
& IPR_CTS
) ? 0 : TIOCM_CTS
;
4689 sigs
|= (ipr
& IPR_DTR
) ? 0: TIOCM_DTR
;
4690 sigs
|= (ipr
& IPR_RTS
) ? 0: TIOCM_RTS
;
4695 /*****************************************************************************/
4698 * Enable/Disable the Transmitter and/or Receiver.
4701 static void stl_sc26198enablerxtx(stlport_t
*portp
, int rx
, int tx
)
4704 unsigned long flags
;
4707 printk("stl_sc26198enablerxtx(portp=%x,rx=%d,tx=%d)\n",
4708 (int) portp
, rx
, tx
);
4711 ccr
= portp
->crenable
;
4713 ccr
&= ~CR_TXENABLE
;
4717 ccr
&= ~CR_RXENABLE
;
4723 BRDENABLE(portp
->brdnr
, portp
->pagenr
);
4724 stl_sc26198setreg(portp
, SCCR
, ccr
);
4725 BRDDISABLE(portp
->brdnr
);
4726 portp
->crenable
= ccr
;
4727 restore_flags(flags
);
4730 /*****************************************************************************/
4733 * Start/stop the Transmitter and/or Receiver.
4736 static void stl_sc26198startrxtx(stlport_t
*portp
, int rx
, int tx
)
4739 unsigned long flags
;
4742 printk("stl_sc26198startrxtx(portp=%x,rx=%d,tx=%d)\n",
4743 (int) portp
, rx
, tx
);
4752 imr
&= ~(IR_RXRDY
| IR_RXBREAK
| IR_RXWATCHDOG
);
4754 imr
|= IR_RXRDY
| IR_RXBREAK
| IR_RXWATCHDOG
;
4758 BRDENABLE(portp
->brdnr
, portp
->pagenr
);
4759 stl_sc26198setreg(portp
, IMR
, imr
);
4760 BRDDISABLE(portp
->brdnr
);
4763 set_bit(ASYI_TXBUSY
, &portp
->istate
);
4764 restore_flags(flags
);
4767 /*****************************************************************************/
4770 * Disable all interrupts from this port.
4773 static void stl_sc26198disableintrs(stlport_t
*portp
)
4775 unsigned long flags
;
4778 printk("stl_sc26198disableintrs(portp=%x)\n", (int) portp
);
4783 BRDENABLE(portp
->brdnr
, portp
->pagenr
);
4785 stl_sc26198setreg(portp
, IMR
, 0);
4786 BRDDISABLE(portp
->brdnr
);
4787 restore_flags(flags
);
4790 /*****************************************************************************/
4792 static void stl_sc26198sendbreak(stlport_t
*portp
, int len
)
4794 unsigned long flags
;
4797 printk("stl_sc26198sendbreak(portp=%x,len=%d)\n", (int) portp
, len
);
4802 BRDENABLE(portp
->brdnr
, portp
->pagenr
);
4804 stl_sc26198setreg(portp
, SCCR
, CR_TXSTARTBREAK
);
4805 portp
->stats
.txbreaks
++;
4807 stl_sc26198setreg(portp
, SCCR
, CR_TXSTOPBREAK
);
4809 BRDDISABLE(portp
->brdnr
);
4810 restore_flags(flags
);
4813 /*****************************************************************************/
4816 * Take flow control actions...
4819 static void stl_sc26198flowctrl(stlport_t
*portp
, int state
)
4821 struct tty_struct
*tty
;
4822 unsigned long flags
;
4826 printk("stl_sc26198flowctrl(portp=%x,state=%x)\n", (int) portp
, state
);
4829 if (portp
== (stlport_t
*) NULL
)
4832 if (tty
== (struct tty_struct
*) NULL
)
4837 BRDENABLE(portp
->brdnr
, portp
->pagenr
);
4840 if (tty
->termios
->c_iflag
& IXOFF
) {
4841 mr0
= stl_sc26198getreg(portp
, MR0
);
4842 stl_sc26198setreg(portp
, MR0
, (mr0
& ~MR0_SWFRXTX
));
4843 stl_sc26198setreg(portp
, SCCR
, CR_TXSENDXON
);
4845 portp
->stats
.rxxon
++;
4846 stl_sc26198wait(portp
);
4847 stl_sc26198setreg(portp
, MR0
, mr0
);
4850 * Question: should we return RTS to what it was before? It may
4851 * have been set by an ioctl... Suppose not, since if you have
4852 * hardware flow control set then it is pretty silly to go and
4853 * set the RTS line by hand.
4855 if (tty
->termios
->c_cflag
& CRTSCTS
) {
4856 stl_sc26198setreg(portp
, MR1
,
4857 (stl_sc26198getreg(portp
, MR1
) | MR1_AUTORTS
));
4858 stl_sc26198setreg(portp
, IOPIOR
,
4859 (stl_sc26198getreg(portp
, IOPIOR
) | IOPR_RTS
));
4860 portp
->stats
.rxrtson
++;
4863 if (tty
->termios
->c_iflag
& IXOFF
) {
4864 mr0
= stl_sc26198getreg(portp
, MR0
);
4865 stl_sc26198setreg(portp
, MR0
, (mr0
& ~MR0_SWFRXTX
));
4866 stl_sc26198setreg(portp
, SCCR
, CR_TXSENDXOFF
);
4868 portp
->stats
.rxxoff
++;
4869 stl_sc26198wait(portp
);
4870 stl_sc26198setreg(portp
, MR0
, mr0
);
4872 if (tty
->termios
->c_cflag
& CRTSCTS
) {
4873 stl_sc26198setreg(portp
, MR1
,
4874 (stl_sc26198getreg(portp
, MR1
) & ~MR1_AUTORTS
));
4875 stl_sc26198setreg(portp
, IOPIOR
,
4876 (stl_sc26198getreg(portp
, IOPIOR
) & ~IOPR_RTS
));
4877 portp
->stats
.rxrtsoff
++;
4881 BRDDISABLE(portp
->brdnr
);
4882 restore_flags(flags
);
4885 /*****************************************************************************/
4888 * Send a flow control character.
4891 static void stl_sc26198sendflow(stlport_t
*portp
, int state
)
4893 struct tty_struct
*tty
;
4894 unsigned long flags
;
4898 printk("stl_sc26198sendflow(portp=%x,state=%x)\n", (int) portp
, state
);
4901 if (portp
== (stlport_t
*) NULL
)
4904 if (tty
== (struct tty_struct
*) NULL
)
4909 BRDENABLE(portp
->brdnr
, portp
->pagenr
);
4911 mr0
= stl_sc26198getreg(portp
, MR0
);
4912 stl_sc26198setreg(portp
, MR0
, (mr0
& ~MR0_SWFRXTX
));
4913 stl_sc26198setreg(portp
, SCCR
, CR_TXSENDXON
);
4915 portp
->stats
.rxxon
++;
4916 stl_sc26198wait(portp
);
4917 stl_sc26198setreg(portp
, MR0
, mr0
);
4919 mr0
= stl_sc26198getreg(portp
, MR0
);
4920 stl_sc26198setreg(portp
, MR0
, (mr0
& ~MR0_SWFRXTX
));
4921 stl_sc26198setreg(portp
, SCCR
, CR_TXSENDXOFF
);
4923 portp
->stats
.rxxoff
++;
4924 stl_sc26198wait(portp
);
4925 stl_sc26198setreg(portp
, MR0
, mr0
);
4927 BRDDISABLE(portp
->brdnr
);
4928 restore_flags(flags
);
4931 /*****************************************************************************/
4933 static void stl_sc26198flush(stlport_t
*portp
)
4935 unsigned long flags
;
4938 printk("stl_sc26198flush(portp=%x)\n", (int) portp
);
4941 if (portp
== (stlport_t
*) NULL
)
4946 BRDENABLE(portp
->brdnr
, portp
->pagenr
);
4947 stl_sc26198setreg(portp
, SCCR
, CR_TXRESET
);
4948 stl_sc26198setreg(portp
, SCCR
, portp
->crenable
);
4949 BRDDISABLE(portp
->brdnr
);
4950 portp
->tx
.tail
= portp
->tx
.head
;
4951 restore_flags(flags
);
4954 /*****************************************************************************/
4957 * Return the current state of data flow on this port. This is only
4958 * really interresting when determining if data has fully completed
4959 * transmission or not... The sc26198 interrupt scheme cannot
4960 * determine when all data has actually drained, so we need to
4961 * check the port statusy register to be sure.
4964 static int stl_sc26198datastate(stlport_t
*portp
)
4966 unsigned long flags
;
4970 printk("stl_sc26198datastate(portp=%x)\n", (int) portp
);
4973 if (portp
== (stlport_t
*) NULL
)
4975 if (test_bit(ASYI_TXBUSY
, &portp
->istate
))
4980 BRDENABLE(portp
->brdnr
, portp
->pagenr
);
4981 sr
= stl_sc26198getreg(portp
, SR
);
4982 BRDDISABLE(portp
->brdnr
);
4983 restore_flags(flags
);
4985 return((sr
& SR_TXEMPTY
) ? 0 : 1);
4988 /*****************************************************************************/
4991 * Delay for a small amount of time, to give the sc26198 a chance
4992 * to process a command...
4995 static void stl_sc26198wait(stlport_t
*portp
)
5000 printk("stl_sc26198wait(portp=%x)\n", (int) portp
);
5003 if (portp
== (stlport_t
*) NULL
)
5006 for (i
= 0; (i
< 20); i
++)
5007 stl_sc26198getglobreg(portp
, TSTR
);
5010 /*****************************************************************************/
5013 * If we are TX flow controlled and in IXANY mode then we may
5014 * need to unflow control here. We gotta do this because of the
5015 * automatic flow control modes of the sc26198.
5018 static inline void stl_sc26198txunflow(stlport_t
*portp
, struct tty_struct
*tty
)
5022 mr0
= stl_sc26198getreg(portp
, MR0
);
5023 stl_sc26198setreg(portp
, MR0
, (mr0
& ~MR0_SWFRXTX
));
5024 stl_sc26198setreg(portp
, SCCR
, CR_HOSTXON
);
5025 stl_sc26198wait(portp
);
5026 stl_sc26198setreg(portp
, MR0
, mr0
);
5027 clear_bit(ASYI_TXFLOWED
, &portp
->istate
);
5030 /*****************************************************************************/
5033 * Interrupt service routine for sc26198 panels.
5036 static void stl_sc26198intr(stlpanel_t
*panelp
, unsigned int iobase
)
5042 * Work around bug in sc26198 chip... Cannot have A6 address
5043 * line of UART high, else iack will be returned as 0.
5045 outb(0, (iobase
+ 1));
5047 iack
= inb(iobase
+ XP_IACK
);
5048 portp
= panelp
->ports
[(iack
& IVR_CHANMASK
) + ((iobase
& 0x4) << 1)];
5050 if (iack
& IVR_RXDATA
)
5051 stl_sc26198rxisr(portp
, iack
);
5052 else if (iack
& IVR_TXDATA
)
5053 stl_sc26198txisr(portp
);
5055 stl_sc26198otherisr(portp
, iack
);
5058 /*****************************************************************************/
5061 * Transmit interrupt handler. This has gotta be fast! Handling TX
5062 * chars is pretty simple, stuff as many as possible from the TX buffer
5063 * into the sc26198 FIFO.
5064 * In practice it is possible that interrupts are enabled but that the
5065 * port has been hung up. Need to handle not having any TX buffer here,
5066 * this is done by using the side effect that head and tail will also
5067 * be NULL if the buffer has been freed.
5070 static void stl_sc26198txisr(stlport_t
*portp
)
5072 unsigned int ioaddr
;
5078 printk("stl_sc26198txisr(portp=%x)\n", (int) portp
);
5081 ioaddr
= portp
->ioaddr
;
5082 head
= portp
->tx
.head
;
5083 tail
= portp
->tx
.tail
;
5084 len
= (head
>= tail
) ? (head
- tail
) : (STL_TXBUFSIZE
- (tail
- head
));
5085 if ((len
== 0) || ((len
< STL_TXBUFLOW
) &&
5086 (test_bit(ASYI_TXLOW
, &portp
->istate
) == 0))) {
5087 set_bit(ASYI_TXLOW
, &portp
->istate
);
5088 queue_task(&portp
->tqueue
, &tq_scheduler
);
5092 outb((MR0
| portp
->uartaddr
), (ioaddr
+ XP_ADDR
));
5093 mr0
= inb(ioaddr
+ XP_DATA
);
5094 if ((mr0
& MR0_TXMASK
) == MR0_TXEMPTY
) {
5095 portp
->imr
&= ~IR_TXRDY
;
5096 outb((IMR
| portp
->uartaddr
), (ioaddr
+ XP_ADDR
));
5097 outb(portp
->imr
, (ioaddr
+ XP_DATA
));
5098 clear_bit(ASYI_TXBUSY
, &portp
->istate
);
5100 mr0
|= ((mr0
& ~MR0_TXMASK
) | MR0_TXEMPTY
);
5101 outb(mr0
, (ioaddr
+ XP_DATA
));
5104 len
= MIN(len
, SC26198_TXFIFOSIZE
);
5105 portp
->stats
.txtotal
+= len
;
5106 stlen
= MIN(len
, ((portp
->tx
.buf
+ STL_TXBUFSIZE
) - tail
));
5107 outb(GTXFIFO
, (ioaddr
+ XP_ADDR
));
5108 outsb((ioaddr
+ XP_DATA
), tail
, stlen
);
5111 if (tail
>= (portp
->tx
.buf
+ STL_TXBUFSIZE
))
5112 tail
= portp
->tx
.buf
;
5114 outsb((ioaddr
+ XP_DATA
), tail
, len
);
5117 portp
->tx
.tail
= tail
;
5121 /*****************************************************************************/
5124 * Receive character interrupt handler. Determine if we have good chars
5125 * or bad chars and then process appropriately. Good chars are easy
5126 * just shove the lot into the RX buffer and set all status byte to 0.
5127 * If a bad RX char then process as required. This routine needs to be
5128 * fast! In practice it is possible that we get an interrupt on a port
5129 * that is closed. This can happen on hangups - since they completely
5130 * shutdown a port not in user context. Need to handle this case.
5133 static void stl_sc26198rxisr(stlport_t
*portp
, unsigned int iack
)
5135 struct tty_struct
*tty
;
5136 unsigned int len
, buflen
, ioaddr
;
5139 printk("stl_sc26198rxisr(portp=%x,iack=%x)\n", (int) portp
, iack
);
5143 ioaddr
= portp
->ioaddr
;
5144 outb(GIBCR
, (ioaddr
+ XP_ADDR
));
5145 len
= inb(ioaddr
+ XP_DATA
) + 1;
5147 if ((iack
& IVR_TYPEMASK
) == IVR_RXDATA
) {
5148 if ((tty
== (struct tty_struct
*) NULL
) ||
5149 (tty
->flip
.char_buf_ptr
== (char *) NULL
) ||
5150 ((buflen
= TTY_FLIPBUF_SIZE
- tty
->flip
.count
) == 0)) {
5151 len
= MIN(len
, sizeof(stl_unwanted
));
5152 outb(GRXFIFO
, (ioaddr
+ XP_ADDR
));
5153 insb((ioaddr
+ XP_DATA
), &stl_unwanted
[0], len
);
5154 portp
->stats
.rxlost
+= len
;
5155 portp
->stats
.rxtotal
+= len
;
5157 len
= MIN(len
, buflen
);
5159 outb(GRXFIFO
, (ioaddr
+ XP_ADDR
));
5160 insb((ioaddr
+ XP_DATA
), tty
->flip
.char_buf_ptr
, len
);
5161 memset(tty
->flip
.flag_buf_ptr
, 0, len
);
5162 tty
->flip
.flag_buf_ptr
+= len
;
5163 tty
->flip
.char_buf_ptr
+= len
;
5164 tty
->flip
.count
+= len
;
5165 tty_schedule_flip(tty
);
5166 portp
->stats
.rxtotal
+= len
;
5170 stl_sc26198rxbadchars(portp
);
5174 * If we are TX flow controlled and in IXANY mode then we may need
5175 * to unflow control here. We gotta do this because of the automatic
5176 * flow control modes of the sc26198.
5178 if (test_bit(ASYI_TXFLOWED
, &portp
->istate
)) {
5179 if ((tty
!= (struct tty_struct
*) NULL
) &&
5180 (tty
->termios
!= (struct termios
*) NULL
) &&
5181 (tty
->termios
->c_iflag
& IXANY
)) {
5182 stl_sc26198txunflow(portp
, tty
);
5187 /*****************************************************************************/
5190 * Process an RX bad character.
5193 static void inline stl_sc26198rxbadch(stlport_t
*portp
, unsigned char status
, char ch
)
5195 struct tty_struct
*tty
;
5196 unsigned int ioaddr
;
5199 ioaddr
= portp
->ioaddr
;
5201 if (status
& SR_RXPARITY
)
5202 portp
->stats
.rxparity
++;
5203 if (status
& SR_RXFRAMING
)
5204 portp
->stats
.rxframing
++;
5205 if (status
& SR_RXOVERRUN
)
5206 portp
->stats
.rxoverrun
++;
5207 if (status
& SR_RXBREAK
)
5208 portp
->stats
.rxbreaks
++;
5210 if ((tty
!= (struct tty_struct
*) NULL
) &&
5211 ((portp
->rxignoremsk
& status
) == 0)) {
5212 if (portp
->rxmarkmsk
& status
) {
5213 if (status
& SR_RXBREAK
) {
5215 if (portp
->flags
& ASYNC_SAK
) {
5217 BRDENABLE(portp
->brdnr
, portp
->pagenr
);
5219 } else if (status
& SR_RXPARITY
) {
5220 status
= TTY_PARITY
;
5221 } else if (status
& SR_RXFRAMING
) {
5223 } else if(status
& SR_RXOVERRUN
) {
5224 status
= TTY_OVERRUN
;
5232 if (tty
->flip
.char_buf_ptr
!= (char *) NULL
) {
5233 if (tty
->flip
.count
< TTY_FLIPBUF_SIZE
) {
5234 *tty
->flip
.flag_buf_ptr
++ = status
;
5235 *tty
->flip
.char_buf_ptr
++ = ch
;
5238 tty_schedule_flip(tty
);
5242 portp
->stats
.rxtotal
++;
5246 /*****************************************************************************/
5249 * Process all characters in the RX FIFO of the UART. Check all char
5250 * status bytes as well, and process as required. We need to check
5251 * all bytes in the FIFO, in case some more enter the FIFO while we
5252 * are here. To get the exact character error type we need to switch
5253 * into CHAR error mode (that is why we need to make sure we empty
5257 static void stl_sc26198rxbadchars(stlport_t
*portp
)
5259 unsigned char status
, mr1
;
5263 * To get the precise error type for each character we must switch
5264 * back into CHAR error mode.
5266 mr1
= stl_sc26198getreg(portp
, MR1
);
5267 stl_sc26198setreg(portp
, MR1
, (mr1
& ~MR1_ERRBLOCK
));
5269 while ((status
= stl_sc26198getreg(portp
, SR
)) & SR_RXRDY
) {
5270 stl_sc26198setreg(portp
, SCCR
, CR_CLEARRXERR
);
5271 ch
= stl_sc26198getreg(portp
, RXFIFO
);
5272 stl_sc26198rxbadch(portp
, status
, ch
);
5276 * To get correct interrupt class we must switch back into BLOCK
5279 stl_sc26198setreg(portp
, MR1
, mr1
);
5282 /*****************************************************************************/
5285 * Other interrupt handler. This includes modem signals, flow
5286 * control actions, etc. Most stuff is left to off-level interrupt
5290 static void stl_sc26198otherisr(stlport_t
*portp
, unsigned int iack
)
5292 unsigned char cir
, ipr
, xisr
;
5295 printk("stl_sc26198otherisr(portp=%x,iack=%x)\n", (int) portp
, iack
);
5298 cir
= stl_sc26198getglobreg(portp
, CIR
);
5300 switch (cir
& CIR_SUBTYPEMASK
) {
5302 ipr
= stl_sc26198getreg(portp
, IPR
);
5303 if (ipr
& IPR_DCDCHANGE
) {
5304 set_bit(ASYI_DCDCHANGE
, &portp
->istate
);
5305 queue_task(&portp
->tqueue
, &tq_scheduler
);
5306 portp
->stats
.modem
++;
5309 case CIR_SUBXONXOFF
:
5310 xisr
= stl_sc26198getreg(portp
, XISR
);
5311 if (xisr
& XISR_RXXONGOT
) {
5312 set_bit(ASYI_TXFLOWED
, &portp
->istate
);
5313 portp
->stats
.txxoff
++;
5315 if (xisr
& XISR_RXXOFFGOT
) {
5316 clear_bit(ASYI_TXFLOWED
, &portp
->istate
);
5317 portp
->stats
.txxon
++;
5321 stl_sc26198setreg(portp
, SCCR
, CR_BREAKRESET
);
5322 stl_sc26198rxbadchars(portp
);
5329 /*****************************************************************************/