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1da177e4
LT		 1/*****************************************************************************/
2
3/*
4 * stallion.c -- stallion multiport serial driver.
5 *
6 * Copyright (C) 1996-1999 Stallion Technologies
7 * Copyright (C) 1994-1996 Greg Ungerer.
8 *
9 * This code is loosely based on the Linux serial driver, written by
10 * Linus Torvalds, Theodore T'so and others.
11 *
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.
16 *
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.
21 *
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.
25 */
26
27/*****************************************************************************/
28
29#include <linux/config.h>
30#include <linux/module.h>
31#include <linux/slab.h>
32#include <linux/interrupt.h>
33#include <linux/tty.h>
34#include <linux/tty_flip.h>
35#include <linux/serial.h>
36#include <linux/cd1400.h>
37#include <linux/sc26198.h>
38#include <linux/comstats.h>
39#include <linux/stallion.h>
40#include <linux/ioport.h>
41#include <linux/init.h>
42#include <linux/smp_lock.h>
43#include <linux/devfs_fs_kernel.h>
44#include <linux/device.h>
45#include <linux/delay.h>
46
47#include <asm/io.h>
48#include <asm/uaccess.h>
49
50#ifdef CONFIG_PCI
51#include <linux/pci.h>
52#endif
53
54/*****************************************************************************/
55
56/*
57 * Define different board types. Use the standard Stallion "assigned"
58 * board numbers. Boards supported in this driver are abbreviated as
59 * EIO = EasyIO and ECH = EasyConnection 8/32.
60 */
61#define BRD_EASYIO 20
62#define BRD_ECH 21
63#define BRD_ECHMC 22
64#define BRD_ECHPCI 26
65#define BRD_ECH64PCI 27
66#define BRD_EASYIOPCI 28
67
68/*
69 * Define a configuration structure to hold the board configuration.
70 * Need to set this up in the code (for now) with the boards that are
71 * to be configured into the system. This is what needs to be modified
72 * when adding/removing/modifying boards. Each line entry in the
73 * stl_brdconf[] array is a board. Each line contains io/irq/memory
74 * ranges for that board (as well as what type of board it is).
75 * Some examples:
76 * { BRD_EASYIO, 0x2a0, 0, 0, 10, 0 },
77 * This line would configure an EasyIO board (4 or 8, no difference),
78 * at io address 2a0 and irq 10.
79 * Another example:
80 * { BRD_ECH, 0x2a8, 0x280, 0, 12, 0 },
81 * This line will configure an EasyConnection 8/32 board at primary io
82 * address 2a8, secondary io address 280 and irq 12.
83 * Enter as many lines into this array as you want (only the first 4
84 * will actually be used!). Any combination of EasyIO and EasyConnection
85 * boards can be specified. EasyConnection 8/32 boards can share their
86 * secondary io addresses between each other.
87 *
88 * NOTE: there is no need to put any entries in this table for PCI
89 * boards. They will be found automatically by the driver - provided
90 * PCI BIOS32 support is compiled into the kernel.
91 */
92
93typedef struct {
94 int brdtype;
95 int ioaddr1;
96 int ioaddr2;
97 unsigned long memaddr;
98 int irq;
99 int irqtype;
100} stlconf_t;
101
102static stlconf_t stl_brdconf[] = {
103 /*{ BRD_EASYIO, 0x2a0, 0, 0, 10, 0 },*/
104};
105
fe971071 106static int stl_nrbrds = ARRAY_SIZE(stl_brdconf);
1da177e4
LT		 107
108/*****************************************************************************/
109
110/*
111 * Define some important driver characteristics. Device major numbers
112 * allocated as per Linux Device Registry.
113 */
114#ifndef STL_SIOMEMMAJOR
115#define STL_SIOMEMMAJOR 28
116#endif
117#ifndef STL_SERIALMAJOR
118#define STL_SERIALMAJOR 24
119#endif
120#ifndef STL_CALLOUTMAJOR
121#define STL_CALLOUTMAJOR 25
122#endif
123
124/*
125 * Set the TX buffer size. Bigger is better, but we don't want
126 * to chew too much memory with buffers!
127 */
128#define STL_TXBUFLOW 512
129#define STL_TXBUFSIZE 4096
130
131/*****************************************************************************/
132
133/*
134 * Define our local driver identity first. Set up stuff to deal with
135 * all the local structures required by a serial tty driver.
136 */
137static char *stl_drvtitle = "Stallion Multiport Serial Driver";
138static char *stl_drvname = "stallion";
139static char *stl_drvversion = "5.6.0";
140
141static struct tty_driver *stl_serial;
142
143/*
144 * We will need to allocate a temporary write buffer for chars that
145 * come direct from user space. The problem is that a copy from user
146 * space might cause a page fault (typically on a system that is
147 * swapping!). All ports will share one buffer - since if the system
148 * is already swapping a shared buffer won't make things any worse.
149 */
150static char *stl_tmpwritebuf;
1da177e4
LT		 151
152/*
153 * Define a local default termios struct. All ports will be created
154 * with this termios initially. Basically all it defines is a raw port
155 * at 9600, 8 data bits, 1 stop bit.
156 */
157static struct termios stl_deftermios = {
158 .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL),
159 .c_cc = INIT_C_CC,
160};
161
162/*
163 * Define global stats structures. Not used often, and can be
164 * re-used for each stats call.
165 */
166static comstats_t stl_comstats;
167static combrd_t stl_brdstats;
168static stlbrd_t stl_dummybrd;
169static stlport_t stl_dummyport;
170
171/*
172 * Define global place to put buffer overflow characters.
173 */
174static char stl_unwanted[SC26198_RXFIFOSIZE];
175
176/*****************************************************************************/
177
178static stlbrd_t *stl_brds[STL_MAXBRDS];
179
180/*
181 * Per board state flags. Used with the state field of the board struct.
182 * Not really much here!
183 */
184#define BRD_FOUND 0x1
185
186/*
187 * Define the port structure istate flags. These set of flags are
188 * modified at interrupt time - so setting and reseting them needs
189 * to be atomic. Use the bit clear/setting routines for this.
190 */
191#define ASYI_TXBUSY 1
192#define ASYI_TXLOW 2
193#define ASYI_DCDCHANGE 3
194#define ASYI_TXFLOWED 4
195
196/*
197 * Define an array of board names as printable strings. Handy for
198 * referencing boards when printing trace and stuff.
199 */
200static char *stl_brdnames[] = {
201 (char *) NULL,
202 (char *) NULL,
203 (char *) NULL,
204 (char *) NULL,
205 (char *) NULL,
206 (char *) NULL,
207 (char *) NULL,
208 (char *) NULL,
209 (char *) NULL,
210 (char *) NULL,
211 (char *) NULL,
212 (char *) NULL,
213 (char *) NULL,
214 (char *) NULL,
215 (char *) NULL,
216 (char *) NULL,
217 (char *) NULL,
218 (char *) NULL,
219 (char *) NULL,
220 (char *) NULL,
221 "EasyIO",
222 "EC8/32-AT",
223 "EC8/32-MC",
224 (char *) NULL,
225 (char *) NULL,
226 (char *) NULL,
227 "EC8/32-PCI",
228 "EC8/64-PCI",
229 "EasyIO-PCI",
230};
231
232/*****************************************************************************/
233
234/*
235 * Define some string labels for arguments passed from the module
236 * load line. These allow for easy board definitions, and easy
237 * modification of the io, memory and irq resoucres.
238 */
239static int stl_nargs = 0;
240static char *board0[4];
241static char *board1[4];
242static char *board2[4];
243static char *board3[4];
244
245static char **stl_brdsp[] = {
246 (char **) &board0,
247 (char **) &board1,
248 (char **) &board2,
249 (char **) &board3
250};
251
252/*
253 * Define a set of common board names, and types. This is used to
254 * parse any module arguments.
255 */
256
257typedef struct stlbrdtype {
258 char *name;
259 int type;
260} stlbrdtype_t;
261
262static stlbrdtype_t stl_brdstr[] = {
263 { "easyio", BRD_EASYIO },
264 { "eio", BRD_EASYIO },
265 { "20", BRD_EASYIO },
266 { "ec8/32", BRD_ECH },
267 { "ec8/32-at", BRD_ECH },
268 { "ec8/32-isa", BRD_ECH },
269 { "ech", BRD_ECH },
270 { "echat", BRD_ECH },
271 { "21", BRD_ECH },
272 { "ec8/32-mc", BRD_ECHMC },
273 { "ec8/32-mca", BRD_ECHMC },
274 { "echmc", BRD_ECHMC },
275 { "echmca", BRD_ECHMC },
276 { "22", BRD_ECHMC },
277 { "ec8/32-pc", BRD_ECHPCI },
278 { "ec8/32-pci", BRD_ECHPCI },
279 { "26", BRD_ECHPCI },
280 { "ec8/64-pc", BRD_ECH64PCI },
281 { "ec8/64-pci", BRD_ECH64PCI },
282 { "ech-pci", BRD_ECH64PCI },
283 { "echpci", BRD_ECH64PCI },
284 { "echpc", BRD_ECH64PCI },
285 { "27", BRD_ECH64PCI },
286 { "easyio-pc", BRD_EASYIOPCI },
287 { "easyio-pci", BRD_EASYIOPCI },
288 { "eio-pci", BRD_EASYIOPCI },
289 { "eiopci", BRD_EASYIOPCI },
290 { "28", BRD_EASYIOPCI },
291};
292
293/*
294 * Define the module agruments.
295 */
296MODULE_AUTHOR("Greg Ungerer");
297MODULE_DESCRIPTION("Stallion Multiport Serial Driver");
298MODULE_LICENSE("GPL");
299
300module_param_array(board0, charp, &stl_nargs, 0);
301MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]");
302module_param_array(board1, charp, &stl_nargs, 0);
303MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]");
304module_param_array(board2, charp, &stl_nargs, 0);
305MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]");
306module_param_array(board3, charp, &stl_nargs, 0);
307MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]");
308
309/*****************************************************************************/
310
311/*
312 * Hardware ID bits for the EasyIO and ECH boards. These defines apply
313 * to the directly accessible io ports of these boards (not the uarts -
314 * they are in cd1400.h and sc26198.h).
315 */
316#define EIO_8PORTRS 0x04
317#define EIO_4PORTRS 0x05
318#define EIO_8PORTDI 0x00
319#define EIO_8PORTM 0x06
320#define EIO_MK3 0x03
321#define EIO_IDBITMASK 0x07
322
323#define EIO_BRDMASK 0xf0
324#define ID_BRD4 0x10
325#define ID_BRD8 0x20
326#define ID_BRD16 0x30
327
328#define EIO_INTRPEND 0x08
329#define EIO_INTEDGE 0x00
330#define EIO_INTLEVEL 0x08
331#define EIO_0WS 0x10
332
333#define ECH_ID 0xa0
334#define ECH_IDBITMASK 0xe0
335#define ECH_BRDENABLE 0x08
336#define ECH_BRDDISABLE 0x00
337#define ECH_INTENABLE 0x01
338#define ECH_INTDISABLE 0x00
339#define ECH_INTLEVEL 0x02
340#define ECH_INTEDGE 0x00
341#define ECH_INTRPEND 0x01
342#define ECH_BRDRESET 0x01
343
344#define ECHMC_INTENABLE 0x01
345#define ECHMC_BRDRESET 0x02
346
347#define ECH_PNLSTATUS 2
348#define ECH_PNL16PORT 0x20
349#define ECH_PNLIDMASK 0x07
350#define ECH_PNLXPID 0x40
351#define ECH_PNLINTRPEND 0x80
352
353#define ECH_ADDR2MASK 0x1e0
354
355/*
356 * Define the vector mapping bits for the programmable interrupt board
357 * hardware. These bits encode the interrupt for the board to use - it
358 * is software selectable (except the EIO-8M).
359 */
360static unsigned char stl_vecmap[] = {
361 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07,
362 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03
363};
364
365/*
366 * Set up enable and disable macros for the ECH boards. They require
367 * the secondary io address space to be activated and deactivated.
368 * This way all ECH boards can share their secondary io region.
369 * If this is an ECH-PCI board then also need to set the page pointer
370 * to point to the correct page.
371 */
372#define BRDENABLE(brdnr,pagenr) \
373 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
374 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \
375 stl_brds[(brdnr)]->ioctrl); \
376 else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \
377 outb((pagenr), stl_brds[(brdnr)]->ioctrl);
378
379#define BRDDISABLE(brdnr) \
380 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
381 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \
382 stl_brds[(brdnr)]->ioctrl);
383
384#define STL_CD1400MAXBAUD 230400
385#define STL_SC26198MAXBAUD 460800
386
387#define STL_BAUDBASE 115200
388#define STL_CLOSEDELAY (5 * HZ / 10)
389
390/*****************************************************************************/
391
392#ifdef CONFIG_PCI
393
394/*
395 * Define the Stallion PCI vendor and device IDs.
396 */
397#ifndef PCI_VENDOR_ID_STALLION
398#define PCI_VENDOR_ID_STALLION 0x124d
399#endif
400#ifndef PCI_DEVICE_ID_ECHPCI832
401#define PCI_DEVICE_ID_ECHPCI832 0x0000
402#endif
403#ifndef PCI_DEVICE_ID_ECHPCI864
404#define PCI_DEVICE_ID_ECHPCI864 0x0002
405#endif
406#ifndef PCI_DEVICE_ID_EIOPCI
407#define PCI_DEVICE_ID_EIOPCI 0x0003
408#endif
409
410/*
411 * Define structure to hold all Stallion PCI boards.
412 */
413typedef struct stlpcibrd {
414 unsigned short vendid;
415 unsigned short devid;
416 int brdtype;
417} stlpcibrd_t;
418
419static stlpcibrd_t stl_pcibrds[] = {
420 { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864, BRD_ECH64PCI },
421 { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI, BRD_EASYIOPCI },
422 { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832, BRD_ECHPCI },
423 { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410, BRD_ECHPCI },
424};
425
fe971071 426static int stl_nrpcibrds = ARRAY_SIZE(stl_pcibrds);
1da177e4
LT		 427
428#endif
429
430/*****************************************************************************/
431
432/*
433 * Define macros to extract a brd/port number from a minor number.
434 */
435#define MINOR2BRD(min) (((min) & 0xc0) >> 6)
436#define MINOR2PORT(min) ((min) & 0x3f)
437
438/*
439 * Define a baud rate table that converts termios baud rate selector
440 * into the actual baud rate value. All baud rate calculations are
441 * based on the actual baud rate required.
442 */
443static unsigned int stl_baudrates[] = {
444 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
445 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
446};
447
448/*
449 * Define some handy local macros...
450 */
451#undef MIN
452#define MIN(a,b) (((a) <= (b)) ? (a) : (b))
453
454#undef TOLOWER
455#define TOLOWER(x) ((((x) >= 'A') && ((x) <= 'Z')) ? ((x) + 0x20) : (x))
456
457/*****************************************************************************/
458
459/*
460 * Declare all those functions in this driver!
461 */
462
463static void stl_argbrds(void);
464static int stl_parsebrd(stlconf_t *confp, char **argp);
465
466static unsigned long stl_atol(char *str);
467
408b664a 468static int stl_init(void);
1da177e4
LT		 469static int stl_open(struct tty_struct *tty, struct file *filp);
470static void stl_close(struct tty_struct *tty, struct file *filp);
471static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count);
472static void stl_putchar(struct tty_struct *tty, unsigned char ch);
473static void stl_flushchars(struct tty_struct *tty);
474static int stl_writeroom(struct tty_struct *tty);
475static int stl_charsinbuffer(struct tty_struct *tty);
476static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg);
477static void stl_settermios(struct tty_struct *tty, struct termios *old);
478static void stl_throttle(struct tty_struct *tty);
479static void stl_unthrottle(struct tty_struct *tty);
480static void stl_stop(struct tty_struct *tty);
481static void stl_start(struct tty_struct *tty);
482static void stl_flushbuffer(struct tty_struct *tty);
483static void stl_breakctl(struct tty_struct *tty, int state);
484static void stl_waituntilsent(struct tty_struct *tty, int timeout);
485static void stl_sendxchar(struct tty_struct *tty, char ch);
486static void stl_hangup(struct tty_struct *tty);
487static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg);
488static int stl_portinfo(stlport_t *portp, int portnr, char *pos);
489static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data);
490
491static int stl_brdinit(stlbrd_t *brdp);
492static int stl_initports(stlbrd_t *brdp, stlpanel_t *panelp);
493static int stl_getserial(stlport_t *portp, struct serial_struct __user *sp);
494static int stl_setserial(stlport_t *portp, struct serial_struct __user *sp);
495static int stl_getbrdstats(combrd_t __user *bp);
496static int stl_getportstats(stlport_t *portp, comstats_t __user *cp);
497static int stl_clrportstats(stlport_t *portp, comstats_t __user *cp);
498static int stl_getportstruct(stlport_t __user *arg);
499static int stl_getbrdstruct(stlbrd_t __user *arg);
500static int stl_waitcarrier(stlport_t *portp, struct file *filp);
501static int stl_eiointr(stlbrd_t *brdp);
502static int stl_echatintr(stlbrd_t *brdp);
503static int stl_echmcaintr(stlbrd_t *brdp);
504static int stl_echpciintr(stlbrd_t *brdp);
505static int stl_echpci64intr(stlbrd_t *brdp);
506static void stl_offintr(void *private);
507static void *stl_memalloc(int len);
508static stlbrd_t *stl_allocbrd(void);
509static stlport_t *stl_getport(int brdnr, int panelnr, int portnr);
510
511static inline int stl_initbrds(void);
512static inline int stl_initeio(stlbrd_t *brdp);
513static inline int stl_initech(stlbrd_t *brdp);
514static inline int stl_getbrdnr(void);
515
516#ifdef CONFIG_PCI
517static inline int stl_findpcibrds(void);
518static inline int stl_initpcibrd(int brdtype, struct pci_dev *devp);
519#endif
520
521/*
522 * CD1400 uart specific handling functions.
523 */
524static void stl_cd1400setreg(stlport_t *portp, int regnr, int value);
525static int stl_cd1400getreg(stlport_t *portp, int regnr);
526static int stl_cd1400updatereg(stlport_t *portp, int regnr, int value);
527static int stl_cd1400panelinit(stlbrd_t *brdp, stlpanel_t *panelp);
528static void stl_cd1400portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp);
529static void stl_cd1400setport(stlport_t *portp, struct termios *tiosp);
530static int stl_cd1400getsignals(stlport_t *portp);
531static void stl_cd1400setsignals(stlport_t *portp, int dtr, int rts);
532static void stl_cd1400ccrwait(stlport_t *portp);
533static void stl_cd1400enablerxtx(stlport_t *portp, int rx, int tx);
534static void stl_cd1400startrxtx(stlport_t *portp, int rx, int tx);
535static void stl_cd1400disableintrs(stlport_t *portp);
536static void stl_cd1400sendbreak(stlport_t *portp, int len);
537static void stl_cd1400flowctrl(stlport_t *portp, int state);
538static void stl_cd1400sendflow(stlport_t *portp, int state);
539static void stl_cd1400flush(stlport_t *portp);
540static int stl_cd1400datastate(stlport_t *portp);
541static void stl_cd1400eiointr(stlpanel_t *panelp, unsigned int iobase);
542static void stl_cd1400echintr(stlpanel_t *panelp, unsigned int iobase);
543static void stl_cd1400txisr(stlpanel_t *panelp, int ioaddr);
544static void stl_cd1400rxisr(stlpanel_t *panelp, int ioaddr);
545static void stl_cd1400mdmisr(stlpanel_t *panelp, int ioaddr);
546
547static inline int stl_cd1400breakisr(stlport_t *portp, int ioaddr);
548
549/*
550 * SC26198 uart specific handling functions.
551 */
552static void stl_sc26198setreg(stlport_t *portp, int regnr, int value);
553static int stl_sc26198getreg(stlport_t *portp, int regnr);
554static int stl_sc26198updatereg(stlport_t *portp, int regnr, int value);
555static int stl_sc26198getglobreg(stlport_t *portp, int regnr);
556static int stl_sc26198panelinit(stlbrd_t *brdp, stlpanel_t *panelp);
557static void stl_sc26198portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp);
558static void stl_sc26198setport(stlport_t *portp, struct termios *tiosp);
559static int stl_sc26198getsignals(stlport_t *portp);
560static void stl_sc26198setsignals(stlport_t *portp, int dtr, int rts);
561static void stl_sc26198enablerxtx(stlport_t *portp, int rx, int tx);
562static void stl_sc26198startrxtx(stlport_t *portp, int rx, int tx);
563static void stl_sc26198disableintrs(stlport_t *portp);
564static void stl_sc26198sendbreak(stlport_t *portp, int len);
565static void stl_sc26198flowctrl(stlport_t *portp, int state);
566static void stl_sc26198sendflow(stlport_t *portp, int state);
567static void stl_sc26198flush(stlport_t *portp);
568static int stl_sc26198datastate(stlport_t *portp);
569static void stl_sc26198wait(stlport_t *portp);
570static void stl_sc26198txunflow(stlport_t *portp, struct tty_struct *tty);
571static void stl_sc26198intr(stlpanel_t *panelp, unsigned int iobase);
572static void stl_sc26198txisr(stlport_t *port);
573static void stl_sc26198rxisr(stlport_t *port, unsigned int iack);
574static void stl_sc26198rxbadch(stlport_t *portp, unsigned char status, char ch);
575static void stl_sc26198rxbadchars(stlport_t *portp);
576static void stl_sc26198otherisr(stlport_t *port, unsigned int iack);
577
578/*****************************************************************************/
579
580/*
581 * Generic UART support structure.
582 */
583typedef struct uart {
584 int (*panelinit)(stlbrd_t *brdp, stlpanel_t *panelp);
585 void (*portinit)(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp);
586 void (*setport)(stlport_t *portp, struct termios *tiosp);
587 int (*getsignals)(stlport_t *portp);
588 void (*setsignals)(stlport_t *portp, int dtr, int rts);
589 void (*enablerxtx)(stlport_t *portp, int rx, int tx);
590 void (*startrxtx)(stlport_t *portp, int rx, int tx);
591 void (*disableintrs)(stlport_t *portp);
592 void (*sendbreak)(stlport_t *portp, int len);
593 void (*flowctrl)(stlport_t *portp, int state);
594 void (*sendflow)(stlport_t *portp, int state);
595 void (*flush)(stlport_t *portp);
596 int (*datastate)(stlport_t *portp);
597 void (*intr)(stlpanel_t *panelp, unsigned int iobase);
598} uart_t;
599
600/*
601 * Define some macros to make calling these functions nice and clean.
602 */
603#define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit)
604#define stl_portinit (* ((uart_t *) portp->uartp)->portinit)
605#define stl_setport (* ((uart_t *) portp->uartp)->setport)
606#define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals)
607#define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals)
608#define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx)
609#define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx)
610#define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs)
611#define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak)
612#define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl)
613#define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow)
614#define stl_flush (* ((uart_t *) portp->uartp)->flush)
615#define stl_datastate (* ((uart_t *) portp->uartp)->datastate)
616
617/*****************************************************************************/
618
619/*
620 * CD1400 UART specific data initialization.
621 */
622static uart_t stl_cd1400uart = {
623 stl_cd1400panelinit,
624 stl_cd1400portinit,
625 stl_cd1400setport,
626 stl_cd1400getsignals,
627 stl_cd1400setsignals,
628 stl_cd1400enablerxtx,
629 stl_cd1400startrxtx,
630 stl_cd1400disableintrs,
631 stl_cd1400sendbreak,
632 stl_cd1400flowctrl,
633 stl_cd1400sendflow,
634 stl_cd1400flush,
635 stl_cd1400datastate,
636 stl_cd1400eiointr
637};
638
639/*
640 * Define the offsets within the register bank of a cd1400 based panel.
641 * These io address offsets are common to the EasyIO board as well.
642 */
643#define EREG_ADDR 0
644#define EREG_DATA 4
645#define EREG_RXACK 5
646#define EREG_TXACK 6
647#define EREG_MDACK 7
648
649#define EREG_BANKSIZE 8
650
651#define CD1400_CLK 25000000
652#define CD1400_CLK8M 20000000
653
654/*
655 * Define the cd1400 baud rate clocks. These are used when calculating
656 * what clock and divisor to use for the required baud rate. Also
657 * define the maximum baud rate allowed, and the default base baud.
658 */
659static int stl_cd1400clkdivs[] = {
660 CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4
661};
662
663/*****************************************************************************/
664
665/*
666 * SC26198 UART specific data initization.
667 */
668static uart_t stl_sc26198uart = {
669 stl_sc26198panelinit,
670 stl_sc26198portinit,
671 stl_sc26198setport,
672 stl_sc26198getsignals,
673 stl_sc26198setsignals,
674 stl_sc26198enablerxtx,
675 stl_sc26198startrxtx,
676 stl_sc26198disableintrs,
677 stl_sc26198sendbreak,
678 stl_sc26198flowctrl,
679 stl_sc26198sendflow,
680 stl_sc26198flush,
681 stl_sc26198datastate,
682 stl_sc26198intr
683};
684
685/*
686 * Define the offsets within the register bank of a sc26198 based panel.
687 */
688#define XP_DATA 0
689#define XP_ADDR 1
690#define XP_MODID 2
691#define XP_STATUS 2
692#define XP_IACK 3
693
694#define XP_BANKSIZE 4
695
696/*
697 * Define the sc26198 baud rate table. Offsets within the table
698 * represent the actual baud rate selector of sc26198 registers.
699 */
700static unsigned int sc26198_baudtable[] = {
701 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600,
702 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200,
703 230400, 460800, 921600
704};
705
fe971071 706#define SC26198_NRBAUDS ARRAY_SIZE(sc26198_baudtable)
1da177e4
LT		 707
708/*****************************************************************************/
709
710/*
711 * Define the driver info for a user level control device. Used mainly
712 * to get at port stats - only not using the port device itself.
713 */
714static struct file_operations stl_fsiomem = {
715 .owner = THIS_MODULE,
716 .ioctl = stl_memioctl,
717};
718
719/*****************************************************************************/
720
ca8eca68 721static struct class *stallion_class;
1da177e4
LT		 722
723/*
724 * Loadable module initialization stuff.
725 */
726
727static int __init stallion_module_init(void)
728{
729 unsigned long flags;
730
731#ifdef DEBUG
732 printk("init_module()\n");
733#endif
734
735 save_flags(flags);
736 cli();
737 stl_init();
738 restore_flags(flags);
739
014c2544 740 return 0;
1da177e4
LT		 741}
742
743/*****************************************************************************/
744
745static void __exit stallion_module_exit(void)
746{
747 stlbrd_t *brdp;
748 stlpanel_t *panelp;
749 stlport_t *portp;
750 unsigned long flags;
751 int i, j, k;
752
753#ifdef DEBUG
754 printk("cleanup_module()\n");
755#endif
756
757 printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle,
758 stl_drvversion);
759
760 save_flags(flags);
761 cli();
762
763/*
764 * Free up all allocated resources used by the ports. This includes
765 * memory and interrupts. As part of this process we will also do
766 * a hangup on every open port - to try to flush out any processes
767 * hanging onto ports.
768 */
769 i = tty_unregister_driver(stl_serial);
770 put_tty_driver(stl_serial);
771 if (i) {
772 printk("STALLION: failed to un-register tty driver, "
773 "errno=%d\n", -i);
774 restore_flags(flags);
775 return;
776 }
777 for (i = 0; i < 4; i++) {
778 devfs_remove("staliomem/%d", i);
ca8eca68 779 class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i));
1da177e4
LT		 780 }
781 devfs_remove("staliomem");
782 if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem")))
783 printk("STALLION: failed to un-register serial memory device, "
784 "errno=%d\n", -i);
ca8eca68 785 class_destroy(stallion_class);
1da177e4 786
735d5661 787 kfree(stl_tmpwritebuf);
1da177e4
LT		 788
789 for (i = 0; (i < stl_nrbrds); i++) {
790 if ((brdp = stl_brds[i]) == (stlbrd_t *) NULL)
791 continue;
792
793 free_irq(brdp->irq, brdp);
794
795 for (j = 0; (j < STL_MAXPANELS); j++) {
796 panelp = brdp->panels[j];
797 if (panelp == (stlpanel_t *) NULL)
798 continue;
799 for (k = 0; (k < STL_PORTSPERPANEL); k++) {
800 portp = panelp->ports[k];
801 if (portp == (stlport_t *) NULL)
802 continue;
803 if (portp->tty != (struct tty_struct *) NULL)
804 stl_hangup(portp->tty);
735d5661 805 kfree(portp->tx.buf);
1da177e4
LT		 806 kfree(portp);
807 }
808 kfree(panelp);
809 }
810
811 release_region(brdp->ioaddr1, brdp->iosize1);
812 if (brdp->iosize2 > 0)
813 release_region(brdp->ioaddr2, brdp->iosize2);
814
815 kfree(brdp);
816 stl_brds[i] = (stlbrd_t *) NULL;
817 }
818
819 restore_flags(flags);
820}
821
822module_init(stallion_module_init);
823module_exit(stallion_module_exit);
824
825/*****************************************************************************/
826
827/*
828 * Check for any arguments passed in on the module load command line.
829 */
830
831static void stl_argbrds(void)
832{
833 stlconf_t conf;
834 stlbrd_t *brdp;
835 int i;
836
837#ifdef DEBUG
838 printk("stl_argbrds()\n");
839#endif
840
841 for (i = stl_nrbrds; (i < stl_nargs); i++) {
842 memset(&conf, 0, sizeof(conf));
843 if (stl_parsebrd(&conf, stl_brdsp[i]) == 0)
844 continue;
845 if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL)
846 continue;
847 stl_nrbrds = i + 1;
848 brdp->brdnr = i;
849 brdp->brdtype = conf.brdtype;
850 brdp->ioaddr1 = conf.ioaddr1;
851 brdp->ioaddr2 = conf.ioaddr2;
852 brdp->irq = conf.irq;
853 brdp->irqtype = conf.irqtype;
854 stl_brdinit(brdp);
855 }
856}
857
858/*****************************************************************************/
859
860/*
861 * Convert an ascii string number into an unsigned long.
862 */
863
864static unsigned long stl_atol(char *str)
865{
866 unsigned long val;
867 int base, c;
868 char *sp;
869
870 val = 0;
871 sp = str;
872 if ((*sp == '0') && (*(sp+1) == 'x')) {
873 base = 16;
874 sp += 2;
875 } else if (*sp == '0') {
876 base = 8;
877 sp++;
878 } else {
879 base = 10;
880 }
881
882 for (; (*sp != 0); sp++) {
883 c = (*sp > '9') ? (TOLOWER(*sp) - 'a' + 10) : (*sp - '0');
884 if ((c < 0) || (c >= base)) {
885 printk("STALLION: invalid argument %s\n", str);
886 val = 0;
887 break;
888 }
889 val = (val * base) + c;
890 }
014c2544 891 return val;
1da177e4
LT		 892}
893
894/*****************************************************************************/
895
896/*
897 * Parse the supplied argument string, into the board conf struct.
898 */
899
900static int stl_parsebrd(stlconf_t *confp, char **argp)
901{
902 char *sp;
fe971071 903 int i;
1da177e4
LT		 904
905#ifdef DEBUG
906 printk("stl_parsebrd(confp=%x,argp=%x)\n", (int) confp, (int) argp);
907#endif
908
909 if ((argp[0] == (char *) NULL) || (*argp[0] == 0))
014c2544 910 return 0;
1da177e4
LT		 911
912 for (sp = argp[0], i = 0; ((*sp != 0) && (i < 25)); sp++, i++)
913 *sp = TOLOWER(*sp);
914
fe971071 915 for (i = 0; i < ARRAY_SIZE(stl_brdstr); i++) {
1da177e4
LT		 916 if (strcmp(stl_brdstr[i].name, argp[0]) == 0)
917 break;
918 }
fe971071 919 if (i == ARRAY_SIZE(stl_brdstr)) {
1da177e4 920 printk("STALLION: unknown board name, %s?\n", argp[0]);
fe971071 921 return 0;
1da177e4
LT		 922 }
923
924 confp->brdtype = stl_brdstr[i].type;
925
926 i = 1;
927 if ((argp[i] != (char *) NULL) && (*argp[i] != 0))
928 confp->ioaddr1 = stl_atol(argp[i]);
929 i++;
930 if (confp->brdtype == BRD_ECH) {
931 if ((argp[i] != (char *) NULL) && (*argp[i] != 0))
932 confp->ioaddr2 = stl_atol(argp[i]);
933 i++;
934 }
935 if ((argp[i] != (char *) NULL) && (*argp[i] != 0))
936 confp->irq = stl_atol(argp[i]);
014c2544 937 return 1;
1da177e4
LT		 938}
939
940/*****************************************************************************/
941
942/*
943 * Local driver kernel memory allocation routine.
944 */
945
946static void *stl_memalloc(int len)
947{
014c2544 948 return (void *) kmalloc(len, GFP_KERNEL);
1da177e4
LT		 949}
950
951/*****************************************************************************/
952
953/*
954 * Allocate a new board structure. Fill out the basic info in it.
955 */
956
957static stlbrd_t *stl_allocbrd(void)
958{
959 stlbrd_t *brdp;
960
961 brdp = (stlbrd_t *) stl_memalloc(sizeof(stlbrd_t));
962 if (brdp == (stlbrd_t *) NULL) {
963 printk("STALLION: failed to allocate memory (size=%d)\n",
964 sizeof(stlbrd_t));
014c2544 965 return (stlbrd_t *) NULL;
1da177e4
LT		 966 }
967
968 memset(brdp, 0, sizeof(stlbrd_t));
969 brdp->magic = STL_BOARDMAGIC;
014c2544 970 return brdp;
1da177e4
LT		 971}
972
973/*****************************************************************************/
974
975static int stl_open(struct tty_struct *tty, struct file *filp)
976{
977 stlport_t *portp;
978 stlbrd_t *brdp;
979 unsigned int minordev;
980 int brdnr, panelnr, portnr, rc;
981
982#ifdef DEBUG
983 printk("stl_open(tty=%x,filp=%x): device=%s\n", (int) tty,
984 (int) filp, tty->name);
985#endif
986
987 minordev = tty->index;
988 brdnr = MINOR2BRD(minordev);
989 if (brdnr >= stl_nrbrds)
014c2544 990 return -ENODEV;
1da177e4
LT		 991 brdp = stl_brds[brdnr];
992 if (brdp == (stlbrd_t *) NULL)
014c2544 993 return -ENODEV;
1da177e4
LT		 994 minordev = MINOR2PORT(minordev);
995 for (portnr = -1, panelnr = 0; (panelnr < STL_MAXPANELS); panelnr++) {
996 if (brdp->panels[panelnr] == (stlpanel_t *) NULL)
997 break;
998 if (minordev < brdp->panels[panelnr]->nrports) {
999 portnr = minordev;
1000 break;
1001 }
1002 minordev -= brdp->panels[panelnr]->nrports;
1003 }
1004 if (portnr < 0)
014c2544 1005 return -ENODEV;
1da177e4
LT		 1006
1007 portp = brdp->panels[panelnr]->ports[portnr];
1008 if (portp == (stlport_t *) NULL)
014c2544 1009 return -ENODEV;
1da177e4
LT		 1010
1011/*
1012 * On the first open of the device setup the port hardware, and
1013 * initialize the per port data structure.
1014 */
1015 portp->tty = tty;
1016 tty->driver_data = portp;
1017 portp->refcount++;
1018
1019 if ((portp->flags & ASYNC_INITIALIZED) == 0) {
1020 if (portp->tx.buf == (char *) NULL) {
1021 portp->tx.buf = (char *) stl_memalloc(STL_TXBUFSIZE);
1022 if (portp->tx.buf == (char *) NULL)
014c2544 1023 return -ENOMEM;
1da177e4
LT		 1024 portp->tx.head = portp->tx.buf;
1025 portp->tx.tail = portp->tx.buf;
1026 }
1027 stl_setport(portp, tty->termios);
1028 portp->sigs = stl_getsignals(portp);
1029 stl_setsignals(portp, 1, 1);
1030 stl_enablerxtx(portp, 1, 1);
1031 stl_startrxtx(portp, 1, 0);
1032 clear_bit(TTY_IO_ERROR, &tty->flags);
1033 portp->flags |= ASYNC_INITIALIZED;
1034 }
1035
1036/*
1037 * Check if this port is in the middle of closing. If so then wait
1038 * until it is closed then return error status, based on flag settings.
1039 * The sleep here does not need interrupt protection since the wakeup
1040 * for it is done with the same context.
1041 */
1042 if (portp->flags & ASYNC_CLOSING) {
1043 interruptible_sleep_on(&portp->close_wait);
1044 if (portp->flags & ASYNC_HUP_NOTIFY)
014c2544
JJ		 1045 return -EAGAIN;
1046 return -ERESTARTSYS;
1da177e4
LT		 1047 }
1048
1049/*
1050 * Based on type of open being done check if it can overlap with any
1051 * previous opens still in effect. If we are a normal serial device
1052 * then also we might have to wait for carrier.
1053 */
1054 if (!(filp->f_flags & O_NONBLOCK)) {
1055 if ((rc = stl_waitcarrier(portp, filp)) != 0)
014c2544 1056 return rc;
1da177e4
LT		 1057 }
1058 portp->flags |= ASYNC_NORMAL_ACTIVE;
1059
014c2544 1060 return 0;
1da177e4
LT		 1061}
1062
1063/*****************************************************************************/
1064
1065/*
1066 * Possibly need to wait for carrier (DCD signal) to come high. Say
1067 * maybe because if we are clocal then we don't need to wait...
1068 */
1069
1070static int stl_waitcarrier(stlport_t *portp, struct file *filp)
1071{
1072 unsigned long flags;
1073 int rc, doclocal;
1074
1075#ifdef DEBUG
1076 printk("stl_waitcarrier(portp=%x,filp=%x)\n", (int) portp, (int) filp);
1077#endif
1078
1079 rc = 0;
1080 doclocal = 0;
1081
1082 if (portp->tty->termios->c_cflag & CLOCAL)
1083 doclocal++;
1084
1085 save_flags(flags);
1086 cli();
1087 portp->openwaitcnt++;
1088 if (! tty_hung_up_p(filp))
1089 portp->refcount--;
1090
1091 for (;;) {
1092 stl_setsignals(portp, 1, 1);
1093 if (tty_hung_up_p(filp) ||
1094 ((portp->flags & ASYNC_INITIALIZED) == 0)) {
1095 if (portp->flags & ASYNC_HUP_NOTIFY)
1096 rc = -EBUSY;
1097 else
1098 rc = -ERESTARTSYS;
1099 break;
1100 }
1101 if (((portp->flags & ASYNC_CLOSING) == 0) &&
1102 (doclocal || (portp->sigs & TIOCM_CD))) {
1103 break;
1104 }
1105 if (signal_pending(current)) {
1106 rc = -ERESTARTSYS;
1107 break;
1108 }
1109 interruptible_sleep_on(&portp->open_wait);
1110 }
1111
1112 if (! tty_hung_up_p(filp))
1113 portp->refcount++;
1114 portp->openwaitcnt--;
1115 restore_flags(flags);
1116
014c2544 1117 return rc;
1da177e4
LT		 1118}
1119
1120/*****************************************************************************/
1121
1122static void stl_close(struct tty_struct *tty, struct file *filp)
1123{
1124 stlport_t *portp;
1125 unsigned long flags;
1126
1127#ifdef DEBUG
1128 printk("stl_close(tty=%x,filp=%x)\n", (int) tty, (int) filp);
1129#endif
1130
1131 portp = tty->driver_data;
1132 if (portp == (stlport_t *) NULL)
1133 return;
1134
1135 save_flags(flags);
1136 cli();
1137 if (tty_hung_up_p(filp)) {
1138 restore_flags(flags);
1139 return;
1140 }
1141 if ((tty->count == 1) && (portp->refcount != 1))
1142 portp->refcount = 1;
1143 if (portp->refcount-- > 1) {
1144 restore_flags(flags);
1145 return;
1146 }
1147
1148 portp->refcount = 0;
1149 portp->flags |= ASYNC_CLOSING;
1150
1151/*
1152 * May want to wait for any data to drain before closing. The BUSY
1153 * flag keeps track of whether we are still sending or not - it is
1154 * very accurate for the cd1400, not quite so for the sc26198.
1155 * (The sc26198 has no "end-of-data" interrupt only empty FIFO)
1156 */
1157 tty->closing = 1;
1158 if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1159 tty_wait_until_sent(tty, portp->closing_wait);
1160 stl_waituntilsent(tty, (HZ / 2));
1161
1162 portp->flags &= ~ASYNC_INITIALIZED;
1163 stl_disableintrs(portp);
1164 if (tty->termios->c_cflag & HUPCL)
1165 stl_setsignals(portp, 0, 0);
1166 stl_enablerxtx(portp, 0, 0);
1167 stl_flushbuffer(tty);
1168 portp->istate = 0;
1169 if (portp->tx.buf != (char *) NULL) {
1170 kfree(portp->tx.buf);
1171 portp->tx.buf = (char *) NULL;
1172 portp->tx.head = (char *) NULL;
1173 portp->tx.tail = (char *) NULL;
1174 }
1175 set_bit(TTY_IO_ERROR, &tty->flags);
1176 tty_ldisc_flush(tty);
1177
1178 tty->closing = 0;
1179 portp->tty = (struct tty_struct *) NULL;
1180
1181 if (portp->openwaitcnt) {
1182 if (portp->close_delay)
1183 msleep_interruptible(jiffies_to_msecs(portp->close_delay));
1184 wake_up_interruptible(&portp->open_wait);
1185 }
1186
1187 portp->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
1188 wake_up_interruptible(&portp->close_wait);
1189 restore_flags(flags);
1190}
1191
1192/*****************************************************************************/
1193
1194/*
1195 * Write routine. Take data and stuff it in to the TX ring queue.
1196 * If transmit interrupts are not running then start them.
1197 */
1198
1199static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count)
1200{
1201 stlport_t *portp;
1202 unsigned int len, stlen;
1203 unsigned char *chbuf;
1204 char *head, *tail;
1205
1206#ifdef DEBUG
1207 printk("stl_write(tty=%x,buf=%x,count=%d)\n",
1208 (int) tty, (int) buf, count);
1209#endif
1210
1211 if ((tty == (struct tty_struct *) NULL) ||
1212 (stl_tmpwritebuf == (char *) NULL))
014c2544 1213 return 0;
1da177e4
LT		 1214 portp = tty->driver_data;
1215 if (portp == (stlport_t *) NULL)
014c2544 1216 return 0;
1da177e4 1217 if (portp->tx.buf == (char *) NULL)
014c2544 1218 return 0;
1da177e4
LT		 1219
1220/*
1221 * If copying direct from user space we must cater for page faults,
1222 * causing us to "sleep" here for a while. To handle this copy in all
1223 * the data we need now, into a local buffer. Then when we got it all
1224 * copy it into the TX buffer.
1225 */
1226 chbuf = (unsigned char *) buf;
1227
1228 head = portp->tx.head;
1229 tail = portp->tx.tail;
1230 if (head >= tail) {
1231 len = STL_TXBUFSIZE - (head - tail) - 1;
1232 stlen = STL_TXBUFSIZE - (head - portp->tx.buf);
1233 } else {
1234 len = tail - head - 1;
1235 stlen = len;
1236 }
1237
1238 len = MIN(len, count);
1239 count = 0;
1240 while (len > 0) {
1241 stlen = MIN(len, stlen);
1242 memcpy(head, chbuf, stlen);
1243 len -= stlen;
1244 chbuf += stlen;
1245 count += stlen;
1246 head += stlen;
1247 if (head >= (portp->tx.buf + STL_TXBUFSIZE)) {
1248 head = portp->tx.buf;
1249 stlen = tail - head;
1250 }
1251 }
1252 portp->tx.head = head;
1253
1254 clear_bit(ASYI_TXLOW, &portp->istate);
1255 stl_startrxtx(portp, -1, 1);
1256
014c2544 1257 return count;
1da177e4
LT		 1258}
1259
1260/*****************************************************************************/
1261
1262static void stl_putchar(struct tty_struct *tty, unsigned char ch)
1263{
1264 stlport_t *portp;
1265 unsigned int len;
1266 char *head, *tail;
1267
1268#ifdef DEBUG
1269 printk("stl_putchar(tty=%x,ch=%x)\n", (int) tty, (int) ch);
1270#endif
1271
1272 if (tty == (struct tty_struct *) NULL)
1273 return;
1274 portp = tty->driver_data;
1275 if (portp == (stlport_t *) NULL)
1276 return;
1277 if (portp->tx.buf == (char *) NULL)
1278 return;
1279
1280 head = portp->tx.head;
1281 tail = portp->tx.tail;
1282
1283 len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head);
1284 len--;
1285
1286 if (len > 0) {
1287 *head++ = ch;
1288 if (head >= (portp->tx.buf + STL_TXBUFSIZE))
1289 head = portp->tx.buf;
1290 }
1291 portp->tx.head = head;
1292}
1293
1294/*****************************************************************************/
1295
1296/*
1297 * If there are any characters in the buffer then make sure that TX
1298 * interrupts are on and get'em out. Normally used after the putchar
1299 * routine has been called.
1300 */
1301
1302static void stl_flushchars(struct tty_struct *tty)
1303{
1304 stlport_t *portp;
1305
1306#ifdef DEBUG
1307 printk("stl_flushchars(tty=%x)\n", (int) tty);
1308#endif
1309
1310 if (tty == (struct tty_struct *) NULL)
1311 return;
1312 portp = tty->driver_data;
1313 if (portp == (stlport_t *) NULL)
1314 return;
1315 if (portp->tx.buf == (char *) NULL)
1316 return;
1317
1318#if 0
1319 if (tty->stopped || tty->hw_stopped ||
1320 (portp->tx.head == portp->tx.tail))
1321 return;
1322#endif
1323 stl_startrxtx(portp, -1, 1);
1324}
1325
1326/*****************************************************************************/
1327
1328static int stl_writeroom(struct tty_struct *tty)
1329{
1330 stlport_t *portp;
1331 char *head, *tail;
1332
1333#ifdef DEBUG
1334 printk("stl_writeroom(tty=%x)\n", (int) tty);
1335#endif
1336
1337 if (tty == (struct tty_struct *) NULL)
014c2544 1338 return 0;
1da177e4
LT		 1339 portp = tty->driver_data;
1340 if (portp == (stlport_t *) NULL)
014c2544 1341 return 0;
1da177e4 1342 if (portp->tx.buf == (char *) NULL)
014c2544 1343 return 0;
1da177e4
LT		 1344
1345 head = portp->tx.head;
1346 tail = portp->tx.tail;
014c2544 1347 return ((head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1));
1da177e4
LT		 1348}
1349
1350/*****************************************************************************/
1351
1352/*
1353 * Return number of chars in the TX buffer. Normally we would just
1354 * calculate the number of chars in the buffer and return that, but if
1355 * the buffer is empty and TX interrupts are still on then we return
1356 * that the buffer still has 1 char in it. This way whoever called us
1357 * will not think that ALL chars have drained - since the UART still
1358 * must have some chars in it (we are busy after all).
1359 */
1360
1361static int stl_charsinbuffer(struct tty_struct *tty)
1362{
1363 stlport_t *portp;
1364 unsigned int size;
1365 char *head, *tail;
1366
1367#ifdef DEBUG
1368 printk("stl_charsinbuffer(tty=%x)\n", (int) tty);
1369#endif
1370
1371 if (tty == (struct tty_struct *) NULL)
014c2544 1372 return 0;
1da177e4
LT		 1373 portp = tty->driver_data;
1374 if (portp == (stlport_t *) NULL)
014c2544 1375 return 0;
1da177e4 1376 if (portp->tx.buf == (char *) NULL)
014c2544 1377 return 0;
1da177e4
LT		 1378
1379 head = portp->tx.head;
1380 tail = portp->tx.tail;
1381 size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
1382 if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate))
1383 size = 1;
014c2544 1384 return size;
1da177e4
LT		 1385}
1386
1387/*****************************************************************************/
1388
1389/*
1390 * Generate the serial struct info.
1391 */
1392
1393static int stl_getserial(stlport_t *portp, struct serial_struct __user *sp)
1394{
1395 struct serial_struct sio;
1396 stlbrd_t *brdp;
1397
1398#ifdef DEBUG
1399 printk("stl_getserial(portp=%x,sp=%x)\n", (int) portp, (int) sp);
1400#endif
1401
1402 memset(&sio, 0, sizeof(struct serial_struct));
1403 sio.line = portp->portnr;
1404 sio.port = portp->ioaddr;
1405 sio.flags = portp->flags;
1406 sio.baud_base = portp->baud_base;
1407 sio.close_delay = portp->close_delay;
1408 sio.closing_wait = portp->closing_wait;
1409 sio.custom_divisor = portp->custom_divisor;
1410 sio.hub6 = 0;
1411 if (portp->uartp == &stl_cd1400uart) {
1412 sio.type = PORT_CIRRUS;
1413 sio.xmit_fifo_size = CD1400_TXFIFOSIZE;
1414 } else {
1415 sio.type = PORT_UNKNOWN;
1416 sio.xmit_fifo_size = SC26198_TXFIFOSIZE;
1417 }
1418
1419 brdp = stl_brds[portp->brdnr];
1420 if (brdp != (stlbrd_t *) NULL)
1421 sio.irq = brdp->irq;
1422
1423 return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0;
1424}
1425
1426/*****************************************************************************/
1427
1428/*
1429 * Set port according to the serial struct info.
1430 * At this point we do not do any auto-configure stuff, so we will
1431 * just quietly ignore any requests to change irq, etc.
1432 */
1433
1434static int stl_setserial(stlport_t *portp, struct serial_struct __user *sp)
1435{
1436 struct serial_struct sio;
1437
1438#ifdef DEBUG
1439 printk("stl_setserial(portp=%x,sp=%x)\n", (int) portp, (int) sp);
1440#endif
1441
1442 if (copy_from_user(&sio, sp, sizeof(struct serial_struct)))
1443 return -EFAULT;
1444 if (!capable(CAP_SYS_ADMIN)) {
1445 if ((sio.baud_base != portp->baud_base) ||
1446 (sio.close_delay != portp->close_delay) ||
1447 ((sio.flags & ~ASYNC_USR_MASK) !=
1448 (portp->flags & ~ASYNC_USR_MASK)))
014c2544 1449 return -EPERM;
1da177e4
LT		 1450 }
1451
1452 portp->flags = (portp->flags & ~ASYNC_USR_MASK) |
1453 (sio.flags & ASYNC_USR_MASK);
1454 portp->baud_base = sio.baud_base;
1455 portp->close_delay = sio.close_delay;
1456 portp->closing_wait = sio.closing_wait;
1457 portp->custom_divisor = sio.custom_divisor;
1458 stl_setport(portp, portp->tty->termios);
014c2544 1459 return 0;
1da177e4
LT		 1460}
1461
1462/*****************************************************************************/
1463
1464static int stl_tiocmget(struct tty_struct *tty, struct file *file)
1465{
1466 stlport_t *portp;
1467
1468 if (tty == (struct tty_struct *) NULL)
014c2544 1469 return -ENODEV;
1da177e4
LT		 1470 portp = tty->driver_data;
1471 if (portp == (stlport_t *) NULL)
014c2544 1472 return -ENODEV;
1da177e4 1473 if (tty->flags & (1 << TTY_IO_ERROR))
014c2544 1474 return -EIO;
1da177e4
LT		 1475
1476 return stl_getsignals(portp);
1477}
1478
1479static int stl_tiocmset(struct tty_struct *tty, struct file *file,
1480 unsigned int set, unsigned int clear)
1481{
1482 stlport_t *portp;
1483 int rts = -1, dtr = -1;
1484
1485 if (tty == (struct tty_struct *) NULL)
014c2544 1486 return -ENODEV;
1da177e4
LT		 1487 portp = tty->driver_data;
1488 if (portp == (stlport_t *) NULL)
014c2544 1489 return -ENODEV;
1da177e4 1490 if (tty->flags & (1 << TTY_IO_ERROR))
014c2544 1491 return -EIO;
1da177e4
LT		 1492
1493 if (set & TIOCM_RTS)
1494 rts = 1;
1495 if (set & TIOCM_DTR)
1496 dtr = 1;
1497 if (clear & TIOCM_RTS)
1498 rts = 0;
1499 if (clear & TIOCM_DTR)
1500 dtr = 0;
1501
1502 stl_setsignals(portp, dtr, rts);
1503 return 0;
1504}
1505
1506static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1507{
1508 stlport_t *portp;
1509 unsigned int ival;
1510 int rc;
1511 void __user *argp = (void __user *)arg;
1512
1513#ifdef DEBUG
1514 printk("stl_ioctl(tty=%x,file=%x,cmd=%x,arg=%x)\n",
1515 (int) tty, (int) file, cmd, (int) arg);
1516#endif
1517
1518 if (tty == (struct tty_struct *) NULL)
014c2544 1519 return -ENODEV;
1da177e4
LT		 1520 portp = tty->driver_data;
1521 if (portp == (stlport_t *) NULL)
014c2544 1522 return -ENODEV;
1da177e4
LT		 1523
1524 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1525 (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) {
1526 if (tty->flags & (1 << TTY_IO_ERROR))
014c2544 1527 return -EIO;
1da177e4
LT		 1528 }
1529
1530 rc = 0;
1531
1532 switch (cmd) {
1533 case TIOCGSOFTCAR:
1534 rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0),
1535 (unsigned __user *) argp);
1536 break;
1537 case TIOCSSOFTCAR:
1538 if (get_user(ival, (unsigned int __user *) arg))
1539 return -EFAULT;
1540 tty->termios->c_cflag =
1541 (tty->termios->c_cflag & ~CLOCAL) |
1542 (ival ? CLOCAL : 0);
1543 break;
1544 case TIOCGSERIAL:
1545 rc = stl_getserial(portp, argp);
1546 break;
1547 case TIOCSSERIAL:
1548 rc = stl_setserial(portp, argp);
1549 break;
1550 case COM_GETPORTSTATS:
1551 rc = stl_getportstats(portp, argp);
1552 break;
1553 case COM_CLRPORTSTATS:
1554 rc = stl_clrportstats(portp, argp);
1555 break;
1556 case TIOCSERCONFIG:
1557 case TIOCSERGWILD:
1558 case TIOCSERSWILD:
1559 case TIOCSERGETLSR:
1560 case TIOCSERGSTRUCT:
1561 case TIOCSERGETMULTI:
1562 case TIOCSERSETMULTI:
1563 default:
1564 rc = -ENOIOCTLCMD;
1565 break;
1566 }
1567
014c2544 1568 return rc;
1da177e4
LT		 1569}
1570
1571/*****************************************************************************/
1572
1573static void stl_settermios(struct tty_struct *tty, struct termios *old)
1574{
1575 stlport_t *portp;
1576 struct termios *tiosp;
1577
1578#ifdef DEBUG
1579 printk("stl_settermios(tty=%x,old=%x)\n", (int) tty, (int) old);
1580#endif
1581
1582 if (tty == (struct tty_struct *) NULL)
1583 return;
1584 portp = tty->driver_data;
1585 if (portp == (stlport_t *) NULL)
1586 return;
1587
1588 tiosp = tty->termios;
1589 if ((tiosp->c_cflag == old->c_cflag) &&
1590 (tiosp->c_iflag == old->c_iflag))
1591 return;
1592
1593 stl_setport(portp, tiosp);
1594 stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0),
1595 -1);
1596 if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) {
1597 tty->hw_stopped = 0;
1598 stl_start(tty);
1599 }
1600 if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
1601 wake_up_interruptible(&portp->open_wait);
1602}
1603
1604/*****************************************************************************/
1605
1606/*
1607 * Attempt to flow control who ever is sending us data. Based on termios
1608 * settings use software or/and hardware flow control.
1609 */
1610
1611static void stl_throttle(struct tty_struct *tty)
1612{
1613 stlport_t *portp;
1614
1615#ifdef DEBUG
1616 printk("stl_throttle(tty=%x)\n", (int) tty);
1617#endif
1618
1619 if (tty == (struct tty_struct *) NULL)
1620 return;
1621 portp = tty->driver_data;
1622 if (portp == (stlport_t *) NULL)
1623 return;
1624 stl_flowctrl(portp, 0);
1625}
1626
1627/*****************************************************************************/
1628
1629/*
1630 * Unflow control the device sending us data...
1631 */
1632
1633static void stl_unthrottle(struct tty_struct *tty)
1634{
1635 stlport_t *portp;
1636
1637#ifdef DEBUG
1638 printk("stl_unthrottle(tty=%x)\n", (int) tty);
1639#endif
1640
1641 if (tty == (struct tty_struct *) NULL)
1642 return;
1643 portp = tty->driver_data;
1644 if (portp == (stlport_t *) NULL)
1645 return;
1646 stl_flowctrl(portp, 1);
1647}
1648
1649/*****************************************************************************/
1650
1651/*
1652 * Stop the transmitter. Basically to do this we will just turn TX
1653 * interrupts off.
1654 */
1655
1656static void stl_stop(struct tty_struct *tty)
1657{
1658 stlport_t *portp;
1659
1660#ifdef DEBUG
1661 printk("stl_stop(tty=%x)\n", (int) tty);
1662#endif
1663
1664 if (tty == (struct tty_struct *) NULL)
1665 return;
1666 portp = tty->driver_data;
1667 if (portp == (stlport_t *) NULL)
1668 return;
1669 stl_startrxtx(portp, -1, 0);
1670}
1671
1672/*****************************************************************************/
1673
1674/*
1675 * Start the transmitter again. Just turn TX interrupts back on.
1676 */
1677
1678static void stl_start(struct tty_struct *tty)
1679{
1680 stlport_t *portp;
1681
1682#ifdef DEBUG
1683 printk("stl_start(tty=%x)\n", (int) tty);
1684#endif
1685
1686 if (tty == (struct tty_struct *) NULL)
1687 return;
1688 portp = tty->driver_data;
1689 if (portp == (stlport_t *) NULL)
1690 return;
1691 stl_startrxtx(portp, -1, 1);
1692}
1693
1694/*****************************************************************************/
1695
1696/*
1697 * Hangup this port. This is pretty much like closing the port, only
1698 * a little more brutal. No waiting for data to drain. Shutdown the
1699 * port and maybe drop signals.
1700 */
1701
1702static void stl_hangup(struct tty_struct *tty)
1703{
1704 stlport_t *portp;
1705
1706#ifdef DEBUG
1707 printk("stl_hangup(tty=%x)\n", (int) tty);
1708#endif
1709
1710 if (tty == (struct tty_struct *) NULL)
1711 return;
1712 portp = tty->driver_data;
1713 if (portp == (stlport_t *) NULL)
1714 return;
1715
1716 portp->flags &= ~ASYNC_INITIALIZED;
1717 stl_disableintrs(portp);
1718 if (tty->termios->c_cflag & HUPCL)
1719 stl_setsignals(portp, 0, 0);
1720 stl_enablerxtx(portp, 0, 0);
1721 stl_flushbuffer(tty);
1722 portp->istate = 0;
1723 set_bit(TTY_IO_ERROR, &tty->flags);
1724 if (portp->tx.buf != (char *) NULL) {
1725 kfree(portp->tx.buf);
1726 portp->tx.buf = (char *) NULL;
1727 portp->tx.head = (char *) NULL;
1728 portp->tx.tail = (char *) NULL;
1729 }
1730 portp->tty = (struct tty_struct *) NULL;
1731 portp->flags &= ~ASYNC_NORMAL_ACTIVE;
1732 portp->refcount = 0;
1733 wake_up_interruptible(&portp->open_wait);
1734}
1735
1736/*****************************************************************************/
1737
1738static void stl_flushbuffer(struct tty_struct *tty)
1739{
1740 stlport_t *portp;
1741
1742#ifdef DEBUG
1743 printk("stl_flushbuffer(tty=%x)\n", (int) tty);
1744#endif
1745
1746 if (tty == (struct tty_struct *) NULL)
1747 return;
1748 portp = tty->driver_data;
1749 if (portp == (stlport_t *) NULL)
1750 return;
1751
1752 stl_flush(portp);
1753 tty_wakeup(tty);
1754}
1755
1756/*****************************************************************************/
1757
1758static void stl_breakctl(struct tty_struct *tty, int state)
1759{
1760 stlport_t *portp;
1761
1762#ifdef DEBUG
1763 printk("stl_breakctl(tty=%x,state=%d)\n", (int) tty, state);
1764#endif
1765
1766 if (tty == (struct tty_struct *) NULL)
1767 return;
1768 portp = tty->driver_data;
1769 if (portp == (stlport_t *) NULL)
1770 return;
1771
1772 stl_sendbreak(portp, ((state == -1) ? 1 : 2));
1773}
1774
1775/*****************************************************************************/
1776
1777static void stl_waituntilsent(struct tty_struct *tty, int timeout)
1778{
1779 stlport_t *portp;
1780 unsigned long tend;
1781
1782#ifdef DEBUG
1783 printk("stl_waituntilsent(tty=%x,timeout=%d)\n", (int) tty, timeout);
1784#endif
1785
1786 if (tty == (struct tty_struct *) NULL)
1787 return;
1788 portp = tty->driver_data;
1789 if (portp == (stlport_t *) NULL)
1790 return;
1791
1792 if (timeout == 0)
1793 timeout = HZ;
1794 tend = jiffies + timeout;
1795
1796 while (stl_datastate(portp)) {
1797 if (signal_pending(current))
1798 break;
1799 msleep_interruptible(20);
1800 if (time_after_eq(jiffies, tend))
1801 break;
1802 }
1803}
1804
1805/*****************************************************************************/
1806
1807static void stl_sendxchar(struct tty_struct *tty, char ch)
1808{
1809 stlport_t *portp;
1810
1811#ifdef DEBUG
1812 printk("stl_sendxchar(tty=%x,ch=%x)\n", (int) tty, ch);
1813#endif
1814
1815 if (tty == (struct tty_struct *) NULL)
1816 return;
1817 portp = tty->driver_data;
1818 if (portp == (stlport_t *) NULL)
1819 return;
1820
1821 if (ch == STOP_CHAR(tty))
1822 stl_sendflow(portp, 0);
1823 else if (ch == START_CHAR(tty))
1824 stl_sendflow(portp, 1);
1825 else
1826 stl_putchar(tty, ch);
1827}
1828
1829/*****************************************************************************/
1830
1831#define MAXLINE 80
1832
1833/*
1834 * Format info for a specified port. The line is deliberately limited
1835 * to 80 characters. (If it is too long it will be truncated, if too
1836 * short then padded with spaces).
1837 */
1838
1839static int stl_portinfo(stlport_t *portp, int portnr, char *pos)
1840{
1841 char *sp;
1842 int sigs, cnt;
1843
1844 sp = pos;
1845 sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d",
1846 portnr, (portp->hwid == 1) ? "SC26198" : "CD1400",
1847 (int) portp->stats.txtotal, (int) portp->stats.rxtotal);
1848
1849 if (portp->stats.rxframing)
1850 sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing);
1851 if (portp->stats.rxparity)
1852 sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity);
1853 if (portp->stats.rxbreaks)
1854 sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks);
1855 if (portp->stats.rxoverrun)
1856 sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun);
1857
1858 sigs = stl_getsignals(portp);
1859 cnt = sprintf(sp, "%s%s%s%s%s ",
1860 (sigs & TIOCM_RTS) ? "|RTS" : "",
1861 (sigs & TIOCM_CTS) ? "|CTS" : "",
1862 (sigs & TIOCM_DTR) ? "|DTR" : "",
1863 (sigs & TIOCM_CD) ? "|DCD" : "",
1864 (sigs & TIOCM_DSR) ? "|DSR" : "");
1865 *sp = ' ';
1866 sp += cnt;
1867
1868 for (cnt = (sp - pos); (cnt < (MAXLINE - 1)); cnt++)
1869 *sp++ = ' ';
1870 if (cnt >= MAXLINE)
1871 pos[(MAXLINE - 2)] = '+';
1872 pos[(MAXLINE - 1)] = '\n';
1873
014c2544 1874 return MAXLINE;
1da177e4
LT		 1875}
1876
1877/*****************************************************************************/
1878
1879/*
1880 * Port info, read from the /proc file system.
1881 */
1882
1883static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data)
1884{
1885 stlbrd_t *brdp;
1886 stlpanel_t *panelp;
1887 stlport_t *portp;
1888 int brdnr, panelnr, portnr, totalport;
1889 int curoff, maxoff;
1890 char *pos;
1891
1892#ifdef DEBUG
1893 printk("stl_readproc(page=%x,start=%x,off=%x,count=%d,eof=%x,"
1894 "data=%x\n", (int) page, (int) start, (int) off, count,
1895 (int) eof, (int) data);
1896#endif
1897
1898 pos = page;
1899 totalport = 0;
1900 curoff = 0;
1901
1902 if (off == 0) {
1903 pos += sprintf(pos, "%s: version %s", stl_drvtitle,
1904 stl_drvversion);
1905 while (pos < (page + MAXLINE - 1))
1906 *pos++ = ' ';
1907 *pos++ = '\n';
1908 }
1909 curoff = MAXLINE;
1910
1911/*
1912 * We scan through for each board, panel and port. The offset is
1913 * calculated on the fly, and irrelevant ports are skipped.
1914 */
1915 for (brdnr = 0; (brdnr < stl_nrbrds); brdnr++) {
1916 brdp = stl_brds[brdnr];
1917 if (brdp == (stlbrd_t *) NULL)
1918 continue;
1919 if (brdp->state == 0)
1920 continue;
1921
1922 maxoff = curoff + (brdp->nrports * MAXLINE);
1923 if (off >= maxoff) {
1924 curoff = maxoff;
1925 continue;
1926 }
1927
1928 totalport = brdnr * STL_MAXPORTS;
1929 for (panelnr = 0; (panelnr < brdp->nrpanels); panelnr++) {
1930 panelp = brdp->panels[panelnr];
1931 if (panelp == (stlpanel_t *) NULL)
1932 continue;
1933
1934 maxoff = curoff + (panelp->nrports * MAXLINE);
1935 if (off >= maxoff) {
1936 curoff = maxoff;
1937 totalport += panelp->nrports;
1938 continue;
1939 }
1940
1941 for (portnr = 0; (portnr < panelp->nrports); portnr++,
1942 totalport++) {
1943 portp = panelp->ports[portnr];
1944 if (portp == (stlport_t *) NULL)
1945 continue;
1946 if (off >= (curoff += MAXLINE))
1947 continue;
1948 if ((pos - page + MAXLINE) > count)
1949 goto stl_readdone;
1950 pos += stl_portinfo(portp, totalport, pos);
1951 }
1952 }
1953 }
1954
1955 *eof = 1;
1956
1957stl_readdone:
1958 *start = page;
014c2544 1959 return (pos - page);
1da177e4
LT		 1960}
1961
1962/*****************************************************************************/
1963
1964/*
1965 * All board interrupts are vectored through here first. This code then
1966 * calls off to the approrpriate board interrupt handlers.
1967 */
1968
1969static irqreturn_t stl_intr(int irq, void *dev_id, struct pt_regs *regs)
1970{
1971 stlbrd_t *brdp = (stlbrd_t *) dev_id;
1972
1973#ifdef DEBUG
1974 printk("stl_intr(brdp=%x,irq=%d,regs=%x)\n", (int) brdp, irq,
1975 (int) regs);
1976#endif
1977
1978 return IRQ_RETVAL((* brdp->isr)(brdp));
1979}
1980
1981/*****************************************************************************/
1982
1983/*
1984 * Interrupt service routine for EasyIO board types.
1985 */
1986
1987static int stl_eiointr(stlbrd_t *brdp)
1988{
1989 stlpanel_t *panelp;
1990 unsigned int iobase;
1991 int handled = 0;
1992
1993 panelp = brdp->panels[0];
1994 iobase = panelp->iobase;
1995 while (inb(brdp->iostatus) & EIO_INTRPEND) {
1996 handled = 1;
1997 (* panelp->isr)(panelp, iobase);
1998 }
1999 return handled;
2000}
2001
2002/*****************************************************************************/
2003
2004/*
2005 * Interrupt service routine for ECH-AT board types.
2006 */
2007
2008static int stl_echatintr(stlbrd_t *brdp)
2009{
2010 stlpanel_t *panelp;
2011 unsigned int ioaddr;
2012 int bnknr;
2013 int handled = 0;
2014
2015 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
2016
2017 while (inb(brdp->iostatus) & ECH_INTRPEND) {
2018 handled = 1;
2019 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
2020 ioaddr = brdp->bnkstataddr[bnknr];
2021 if (inb(ioaddr) & ECH_PNLINTRPEND) {
2022 panelp = brdp->bnk2panel[bnknr];
2023 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
2024 }
2025 }
2026 }
2027
2028 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
2029
2030 return handled;
2031}
2032
2033/*****************************************************************************/
2034
2035/*
2036 * Interrupt service routine for ECH-MCA board types.
2037 */
2038
2039static int stl_echmcaintr(stlbrd_t *brdp)
2040{
2041 stlpanel_t *panelp;
2042 unsigned int ioaddr;
2043 int bnknr;
2044 int handled = 0;
2045
2046 while (inb(brdp->iostatus) & ECH_INTRPEND) {
2047 handled = 1;
2048 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
2049 ioaddr = brdp->bnkstataddr[bnknr];
2050 if (inb(ioaddr) & ECH_PNLINTRPEND) {
2051 panelp = brdp->bnk2panel[bnknr];
2052 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
2053 }
2054 }
2055 }
2056 return handled;
2057}
2058
2059/*****************************************************************************/
2060
2061/*
2062 * Interrupt service routine for ECH-PCI board types.
2063 */
2064
2065static int stl_echpciintr(stlbrd_t *brdp)
2066{
2067 stlpanel_t *panelp;
2068 unsigned int ioaddr;
2069 int bnknr, recheck;
2070 int handled = 0;
2071
2072 while (1) {
2073 recheck = 0;
2074 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
2075 outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl);
2076 ioaddr = brdp->bnkstataddr[bnknr];
2077 if (inb(ioaddr) & ECH_PNLINTRPEND) {
2078 panelp = brdp->bnk2panel[bnknr];
2079 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
2080 recheck++;
2081 handled = 1;
2082 }
2083 }
2084 if (! recheck)
2085 break;
2086 }
2087 return handled;
2088}
2089
2090/*****************************************************************************/
2091
2092/*
2093 * Interrupt service routine for ECH-8/64-PCI board types.
2094 */
2095
2096static int stl_echpci64intr(stlbrd_t *brdp)
2097{
2098 stlpanel_t *panelp;
2099 unsigned int ioaddr;
2100 int bnknr;
2101 int handled = 0;
2102
2103 while (inb(brdp->ioctrl) & 0x1) {
2104 handled = 1;
2105 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
2106 ioaddr = brdp->bnkstataddr[bnknr];
2107 if (inb(ioaddr) & ECH_PNLINTRPEND) {
2108 panelp = brdp->bnk2panel[bnknr];
2109 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
2110 }
2111 }
2112 }
2113
2114 return handled;
2115}
2116
2117/*****************************************************************************/
2118
2119/*
2120 * Service an off-level request for some channel.
2121 */
2122static void stl_offintr(void *private)
2123{
2124 stlport_t *portp;
2125 struct tty_struct *tty;
2126 unsigned int oldsigs;
2127
2128 portp = private;
2129
2130#ifdef DEBUG
2131 printk("stl_offintr(portp=%x)\n", (int) portp);
2132#endif
2133
2134 if (portp == (stlport_t *) NULL)
2135 return;
2136
2137 tty = portp->tty;
2138 if (tty == (struct tty_struct *) NULL)
2139 return;
2140
2141 lock_kernel();
2142 if (test_bit(ASYI_TXLOW, &portp->istate)) {
2143 tty_wakeup(tty);
2144 }
2145 if (test_bit(ASYI_DCDCHANGE, &portp->istate)) {
2146 clear_bit(ASYI_DCDCHANGE, &portp->istate);
2147 oldsigs = portp->sigs;
2148 portp->sigs = stl_getsignals(portp);
2149 if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0))
2150 wake_up_interruptible(&portp->open_wait);
2151 if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0)) {
2152 if (portp->flags & ASYNC_CHECK_CD)
2153 tty_hangup(tty); /* FIXME: module removal race here - AKPM */
2154 }
2155 }
2156 unlock_kernel();
2157}
2158
2159/*****************************************************************************/
2160
2161/*
2162 * Initialize all the ports on a panel.
2163 */
2164
2165static int __init stl_initports(stlbrd_t *brdp, stlpanel_t *panelp)
2166{
2167 stlport_t *portp;
2168 int chipmask, i;
2169
2170#ifdef DEBUG
2171 printk("stl_initports(brdp=%x,panelp=%x)\n", (int) brdp, (int) panelp);
2172#endif
2173
2174 chipmask = stl_panelinit(brdp, panelp);
2175
2176/*
2177 * All UART's are initialized (if found!). Now go through and setup
2178 * each ports data structures.
2179 */
2180 for (i = 0; (i < panelp->nrports); i++) {
2181 portp = (stlport_t *) stl_memalloc(sizeof(stlport_t));
2182 if (portp == (stlport_t *) NULL) {
2183 printk("STALLION: failed to allocate memory "
2184 "(size=%d)\n", sizeof(stlport_t));
2185 break;
2186 }
2187 memset(portp, 0, sizeof(stlport_t));
2188
2189 portp->magic = STL_PORTMAGIC;
2190 portp->portnr = i;
2191 portp->brdnr = panelp->brdnr;
2192 portp->panelnr = panelp->panelnr;
2193 portp->uartp = panelp->uartp;
2194 portp->clk = brdp->clk;
2195 portp->baud_base = STL_BAUDBASE;
2196 portp->close_delay = STL_CLOSEDELAY;
2197 portp->closing_wait = 30 * HZ;
2198 INIT_WORK(&portp->tqueue, stl_offintr, portp);
2199 init_waitqueue_head(&portp->open_wait);
2200 init_waitqueue_head(&portp->close_wait);
2201 portp->stats.brd = portp->brdnr;
2202 portp->stats.panel = portp->panelnr;
2203 portp->stats.port = portp->portnr;
2204 panelp->ports[i] = portp;
2205 stl_portinit(brdp, panelp, portp);
2206 }
2207
2208 return(0);
2209}
2210
2211/*****************************************************************************/
2212
2213/*
2214 * Try to find and initialize an EasyIO board.
2215 */
2216
2217static inline int stl_initeio(stlbrd_t *brdp)
2218{
2219 stlpanel_t *panelp;
2220 unsigned int status;
2221 char *name;
2222 int rc;
2223
2224#ifdef DEBUG
2225 printk("stl_initeio(brdp=%x)\n", (int) brdp);
2226#endif
2227
2228 brdp->ioctrl = brdp->ioaddr1 + 1;
2229 brdp->iostatus = brdp->ioaddr1 + 2;
2230
2231 status = inb(brdp->iostatus);
2232 if ((status & EIO_IDBITMASK) == EIO_MK3)
2233 brdp->ioctrl++;
2234
2235/*
2236 * Handle board specific stuff now. The real difference is PCI
2237 * or not PCI.
2238 */
2239 if (brdp->brdtype == BRD_EASYIOPCI) {
2240 brdp->iosize1 = 0x80;
2241 brdp->iosize2 = 0x80;
2242 name = "serial(EIO-PCI)";
2243 outb(0x41, (brdp->ioaddr2 + 0x4c));
2244 } else {
2245 brdp->iosize1 = 8;
2246 name = "serial(EIO)";
2247 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2248 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2249 printk("STALLION: invalid irq=%d for brd=%d\n",
2250 brdp->irq, brdp->brdnr);
2251 return(-EINVAL);
2252 }
2253 outb((stl_vecmap[brdp->irq] | EIO_0WS |
2254 ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)),
2255 brdp->ioctrl);
2256 }
2257
2258 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
2259 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
2260 "%x conflicts with another device\n", brdp->brdnr,
2261 brdp->ioaddr1);
2262 return(-EBUSY);
2263 }
2264
2265 if (brdp->iosize2 > 0)
2266 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
2267 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
2268 "address %x conflicts with another device\n",
2269 brdp->brdnr, brdp->ioaddr2);
2270 printk(KERN_WARNING "STALLION: Warning, also "
2271 "releasing board %d I/O address %x \n",
2272 brdp->brdnr, brdp->ioaddr1);
2273 release_region(brdp->ioaddr1, brdp->iosize1);
2274 return(-EBUSY);
2275 }
2276
2277/*
2278 * Everything looks OK, so let's go ahead and probe for the hardware.
2279 */
2280 brdp->clk = CD1400_CLK;
2281 brdp->isr = stl_eiointr;
2282
2283 switch (status & EIO_IDBITMASK) {
2284 case EIO_8PORTM:
2285 brdp->clk = CD1400_CLK8M;
2286 /* fall thru */
2287 case EIO_8PORTRS:
2288 case EIO_8PORTDI:
2289 brdp->nrports = 8;
2290 break;
2291 case EIO_4PORTRS:
2292 brdp->nrports = 4;
2293 break;
2294 case EIO_MK3:
2295 switch (status & EIO_BRDMASK) {
2296 case ID_BRD4:
2297 brdp->nrports = 4;
2298 break;
2299 case ID_BRD8:
2300 brdp->nrports = 8;
2301 break;
2302 case ID_BRD16:
2303 brdp->nrports = 16;
2304 break;
2305 default:
2306 return(-ENODEV);
2307 }
2308 break;
2309 default:
2310 return(-ENODEV);
2311 }
2312
2313/*
2314 * We have verified that the board is actually present, so now we
2315 * can complete the setup.
2316 */
2317
2318 panelp = (stlpanel_t *) stl_memalloc(sizeof(stlpanel_t));
2319 if (panelp == (stlpanel_t *) NULL) {
2320 printk(KERN_WARNING "STALLION: failed to allocate memory "
2321 "(size=%d)\n", sizeof(stlpanel_t));
2322 return(-ENOMEM);
2323 }
2324 memset(panelp, 0, sizeof(stlpanel_t));
2325
2326 panelp->magic = STL_PANELMAGIC;
2327 panelp->brdnr = brdp->brdnr;
2328 panelp->panelnr = 0;
2329 panelp->nrports = brdp->nrports;
2330 panelp->iobase = brdp->ioaddr1;
2331 panelp->hwid = status;
2332 if ((status & EIO_IDBITMASK) == EIO_MK3) {
2333 panelp->uartp = (void *) &stl_sc26198uart;
2334 panelp->isr = stl_sc26198intr;
2335 } else {
2336 panelp->uartp = (void *) &stl_cd1400uart;
2337 panelp->isr = stl_cd1400eiointr;
2338 }
2339
2340 brdp->panels[0] = panelp;
2341 brdp->nrpanels = 1;
2342 brdp->state |= BRD_FOUND;
2343 brdp->hwid = status;
2344 if (request_irq(brdp->irq, stl_intr, SA_SHIRQ, name, brdp) != 0) {
2345 printk("STALLION: failed to register interrupt "
2346 "routine for %s irq=%d\n", name, brdp->irq);
2347 rc = -ENODEV;
2348 } else {
2349 rc = 0;
2350 }
014c2544 2351 return rc;
1da177e4
LT		 2352}
2353
2354/*****************************************************************************/
2355
2356/*
2357 * Try to find an ECH board and initialize it. This code is capable of
2358 * dealing with all types of ECH board.
2359 */
2360
2361static inline int stl_initech(stlbrd_t *brdp)
2362{
2363 stlpanel_t *panelp;
2364 unsigned int status, nxtid, ioaddr, conflict;
2365 int panelnr, banknr, i;
2366 char *name;
2367
2368#ifdef DEBUG
2369 printk("stl_initech(brdp=%x)\n", (int) brdp);
2370#endif
2371
2372 status = 0;
2373 conflict = 0;
2374
2375/*
2376 * Set up the initial board register contents for boards. This varies a
2377 * bit between the different board types. So we need to handle each
2378 * separately. Also do a check that the supplied IRQ is good.
2379 */
2380 switch (brdp->brdtype) {
2381
2382 case BRD_ECH:
2383 brdp->isr = stl_echatintr;
2384 brdp->ioctrl = brdp->ioaddr1 + 1;
2385 brdp->iostatus = brdp->ioaddr1 + 1;
2386 status = inb(brdp->iostatus);
2387 if ((status & ECH_IDBITMASK) != ECH_ID)
2388 return(-ENODEV);
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);
2393 return(-EINVAL);
2394 }
2395 status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1);
2396 status |= (stl_vecmap[brdp->irq] << 1);
2397 outb((status | ECH_BRDRESET), brdp->ioaddr1);
2398 brdp->ioctrlval = ECH_INTENABLE |
2399 ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE);
2400 for (i = 0; (i < 10); i++)
2401 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
2402 brdp->iosize1 = 2;
2403 brdp->iosize2 = 32;
2404 name = "serial(EC8/32)";
2405 outb(status, brdp->ioaddr1);
2406 break;
2407
2408 case BRD_ECHMC:
2409 brdp->isr = stl_echmcaintr;
2410 brdp->ioctrl = brdp->ioaddr1 + 0x20;
2411 brdp->iostatus = brdp->ioctrl;
2412 status = inb(brdp->iostatus);
2413 if ((status & ECH_IDBITMASK) != ECH_ID)
2414 return(-ENODEV);
2415 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2416 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2417 printk("STALLION: invalid irq=%d for brd=%d\n",
2418 brdp->irq, brdp->brdnr);
2419 return(-EINVAL);
2420 }
2421 outb(ECHMC_BRDRESET, brdp->ioctrl);
2422 outb(ECHMC_INTENABLE, brdp->ioctrl);
2423 brdp->iosize1 = 64;
2424 name = "serial(EC8/32-MC)";
2425 break;
2426
2427 case BRD_ECHPCI:
2428 brdp->isr = stl_echpciintr;
2429 brdp->ioctrl = brdp->ioaddr1 + 2;
2430 brdp->iosize1 = 4;
2431 brdp->iosize2 = 8;
2432 name = "serial(EC8/32-PCI)";
2433 break;
2434
2435 case BRD_ECH64PCI:
2436 brdp->isr = stl_echpci64intr;
2437 brdp->ioctrl = brdp->ioaddr2 + 0x40;
2438 outb(0x43, (brdp->ioaddr1 + 0x4c));
2439 brdp->iosize1 = 0x80;
2440 brdp->iosize2 = 0x80;
2441 name = "serial(EC8/64-PCI)";
2442 break;
2443
2444 default:
2445 printk("STALLION: unknown board type=%d\n", brdp->brdtype);
2446 return(-EINVAL);
2447 break;
2448 }
2449
2450/*
2451 * Check boards for possible IO address conflicts and return fail status
2452 * if an IO conflict found.
2453 */
2454 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
2455 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
2456 "%x conflicts with another device\n", brdp->brdnr,
2457 brdp->ioaddr1);
2458 return(-EBUSY);
2459 }
2460
2461 if (brdp->iosize2 > 0)
2462 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
2463 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
2464 "address %x conflicts with another device\n",
2465 brdp->brdnr, brdp->ioaddr2);
2466 printk(KERN_WARNING "STALLION: Warning, also "
2467 "releasing board %d I/O address %x \n",
2468 brdp->brdnr, brdp->ioaddr1);
2469 release_region(brdp->ioaddr1, brdp->iosize1);
2470 return(-EBUSY);
2471 }
2472
2473/*
2474 * Scan through the secondary io address space looking for panels.
2475 * As we find'em allocate and initialize panel structures for each.
2476 */
2477 brdp->clk = CD1400_CLK;
2478 brdp->hwid = status;
2479
2480 ioaddr = brdp->ioaddr2;
2481 banknr = 0;
2482 panelnr = 0;
2483 nxtid = 0;
2484
2485 for (i = 0; (i < STL_MAXPANELS); i++) {
2486 if (brdp->brdtype == BRD_ECHPCI) {
2487 outb(nxtid, brdp->ioctrl);
2488 ioaddr = brdp->ioaddr2;
2489 }
2490 status = inb(ioaddr + ECH_PNLSTATUS);
2491 if ((status & ECH_PNLIDMASK) != nxtid)
2492 break;
2493 panelp = (stlpanel_t *) stl_memalloc(sizeof(stlpanel_t));
2494 if (panelp == (stlpanel_t *) NULL) {
2495 printk("STALLION: failed to allocate memory "
2496 "(size=%d)\n", sizeof(stlpanel_t));
2497 break;
2498 }
2499 memset(panelp, 0, sizeof(stlpanel_t));
2500 panelp->magic = STL_PANELMAGIC;
2501 panelp->brdnr = brdp->brdnr;
2502 panelp->panelnr = panelnr;
2503 panelp->iobase = ioaddr;
2504 panelp->pagenr = nxtid;
2505 panelp->hwid = status;
2506 brdp->bnk2panel[banknr] = panelp;
2507 brdp->bnkpageaddr[banknr] = nxtid;
2508 brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS;
2509
2510 if (status & ECH_PNLXPID) {
2511 panelp->uartp = (void *) &stl_sc26198uart;
2512 panelp->isr = stl_sc26198intr;
2513 if (status & ECH_PNL16PORT) {
2514 panelp->nrports = 16;
2515 brdp->bnk2panel[banknr] = panelp;
2516 brdp->bnkpageaddr[banknr] = nxtid;
2517 brdp->bnkstataddr[banknr++] = ioaddr + 4 +
2518 ECH_PNLSTATUS;
2519 } else {
2520 panelp->nrports = 8;
2521 }
2522 } else {
2523 panelp->uartp = (void *) &stl_cd1400uart;
2524 panelp->isr = stl_cd1400echintr;
2525 if (status & ECH_PNL16PORT) {
2526 panelp->nrports = 16;
2527 panelp->ackmask = 0x80;
2528 if (brdp->brdtype != BRD_ECHPCI)
2529 ioaddr += EREG_BANKSIZE;
2530 brdp->bnk2panel[banknr] = panelp;
2531 brdp->bnkpageaddr[banknr] = ++nxtid;
2532 brdp->bnkstataddr[banknr++] = ioaddr +
2533 ECH_PNLSTATUS;
2534 } else {
2535 panelp->nrports = 8;
2536 panelp->ackmask = 0xc0;
2537 }
2538 }
2539
2540 nxtid++;
2541 ioaddr += EREG_BANKSIZE;
2542 brdp->nrports += panelp->nrports;
2543 brdp->panels[panelnr++] = panelp;
2544 if ((brdp->brdtype != BRD_ECHPCI) &&
2545 (ioaddr >= (brdp->ioaddr2 + brdp->iosize2)))
2546 break;
2547 }
2548
2549 brdp->nrpanels = panelnr;
2550 brdp->nrbnks = banknr;
2551 if (brdp->brdtype == BRD_ECH)
2552 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
2553
2554 brdp->state |= BRD_FOUND;
2555 if (request_irq(brdp->irq, stl_intr, SA_SHIRQ, name, brdp) != 0) {
2556 printk("STALLION: failed to register interrupt "
2557 "routine for %s irq=%d\n", name, brdp->irq);
2558 i = -ENODEV;
2559 } else {
2560 i = 0;
2561 }
2562
2563 return(i);
2564}
2565
2566/*****************************************************************************/
2567
2568/*
2569 * Initialize and configure the specified board.
2570 * Scan through all the boards in the configuration and see what we
2571 * can find. Handle EIO and the ECH boards a little differently here
2572 * since the initial search and setup is very different.
2573 */
2574
2575static int __init stl_brdinit(stlbrd_t *brdp)
2576{
2577 int i;
2578
2579#ifdef DEBUG
2580 printk("stl_brdinit(brdp=%x)\n", (int) brdp);
2581#endif
2582
2583 switch (brdp->brdtype) {
2584 case BRD_EASYIO:
2585 case BRD_EASYIOPCI:
2586 stl_initeio(brdp);
2587 break;
2588 case BRD_ECH:
2589 case BRD_ECHMC:
2590 case BRD_ECHPCI:
2591 case BRD_ECH64PCI:
2592 stl_initech(brdp);
2593 break;
2594 default:
2595 printk("STALLION: board=%d is unknown board type=%d\n",
2596 brdp->brdnr, brdp->brdtype);
2597 return(ENODEV);
2598 }
2599
2600 stl_brds[brdp->brdnr] = brdp;
2601 if ((brdp->state & BRD_FOUND) == 0) {
2602 printk("STALLION: %s board not found, board=%d io=%x irq=%d\n",
2603 stl_brdnames[brdp->brdtype], brdp->brdnr,
2604 brdp->ioaddr1, brdp->irq);
2605 return(ENODEV);
2606 }
2607
2608 for (i = 0; (i < STL_MAXPANELS); i++)
2609 if (brdp->panels[i] != (stlpanel_t *) NULL)
2610 stl_initports(brdp, brdp->panels[i]);
2611
2612 printk("STALLION: %s found, board=%d io=%x irq=%d "
2613 "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype],
2614 brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels,
2615 brdp->nrports);
2616 return(0);
2617}
2618
2619/*****************************************************************************/
2620
2621/*
2622 * Find the next available board number that is free.
2623 */
2624
2625static inline int stl_getbrdnr(void)
2626{
2627 int i;
2628
2629 for (i = 0; (i < STL_MAXBRDS); i++) {
2630 if (stl_brds[i] == (stlbrd_t *) NULL) {
2631 if (i >= stl_nrbrds)
2632 stl_nrbrds = i + 1;
2633 return(i);
2634 }
2635 }
2636 return(-1);
2637}
2638
2639/*****************************************************************************/
2640
2641#ifdef CONFIG_PCI
2642
2643/*
2644 * We have a Stallion board. Allocate a board structure and
2645 * initialize it. Read its IO and IRQ resources from PCI
2646 * configuration space.
2647 */
2648
2649static inline int stl_initpcibrd(int brdtype, struct pci_dev *devp)
2650{
2651 stlbrd_t *brdp;
2652
2653#ifdef DEBUG
2654 printk("stl_initpcibrd(brdtype=%d,busnr=%x,devnr=%x)\n", brdtype,
2655 devp->bus->number, devp->devfn);
2656#endif
2657
2658 if (pci_enable_device(devp))
2659 return(-EIO);
2660 if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL)
2661 return(-ENOMEM);
2662 if ((brdp->brdnr = stl_getbrdnr()) < 0) {
2663 printk("STALLION: too many boards found, "
2664 "maximum supported %d\n", STL_MAXBRDS);
2665 return(0);
2666 }
2667 brdp->brdtype = brdtype;
2668
2669/*
2670 * Different Stallion boards use the BAR registers in different ways,
2671 * so set up io addresses based on board type.
2672 */
2673#ifdef DEBUG
2674 printk("%s(%d): BAR[]=%x,%x,%x,%x IRQ=%x\n", __FILE__, __LINE__,
2675 pci_resource_start(devp, 0), pci_resource_start(devp, 1),
2676 pci_resource_start(devp, 2), pci_resource_start(devp, 3), devp->irq);
2677#endif
2678
2679/*
2680 * We have all resources from the board, so let's setup the actual
2681 * board structure now.
2682 */
2683 switch (brdtype) {
2684 case BRD_ECHPCI:
2685 brdp->ioaddr2 = pci_resource_start(devp, 0);
2686 brdp->ioaddr1 = pci_resource_start(devp, 1);
2687 break;
2688 case BRD_ECH64PCI:
2689 brdp->ioaddr2 = pci_resource_start(devp, 2);
2690 brdp->ioaddr1 = pci_resource_start(devp, 1);
2691 break;
2692 case BRD_EASYIOPCI:
2693 brdp->ioaddr1 = pci_resource_start(devp, 2);
2694 brdp->ioaddr2 = pci_resource_start(devp, 1);
2695 break;
2696 default:
2697 printk("STALLION: unknown PCI board type=%d\n", brdtype);
2698 break;
2699 }
2700
2701 brdp->irq = devp->irq;
2702 stl_brdinit(brdp);
2703
2704 return(0);
2705}
2706
2707/*****************************************************************************/
2708
2709/*
2710 * Find all Stallion PCI boards that might be installed. Initialize each
2711 * one as it is found.
2712 */
2713
2714
2715static inline int stl_findpcibrds(void)
2716{
2717 struct pci_dev *dev = NULL;
2718 int i, rc;
2719
2720#ifdef DEBUG
2721 printk("stl_findpcibrds()\n");
2722#endif
2723
2724 for (i = 0; (i < stl_nrpcibrds); i++)
2725 while ((dev = pci_find_device(stl_pcibrds[i].vendid,
2726 stl_pcibrds[i].devid, dev))) {
2727
2728/*
2729 * Found a device on the PCI bus that has our vendor and
2730 * device ID. Need to check now that it is really us.
2731 */
2732 if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE)
2733 continue;
2734
2735 rc = stl_initpcibrd(stl_pcibrds[i].brdtype, dev);
2736 if (rc)
2737 return(rc);
2738 }
2739
2740 return(0);
2741}
2742
2743#endif
2744
2745/*****************************************************************************/
2746
2747/*
2748 * Scan through all the boards in the configuration and see what we
2749 * can find. Handle EIO and the ECH boards a little differently here
2750 * since the initial search and setup is too different.
2751 */
2752
2753static inline int stl_initbrds(void)
2754{
2755 stlbrd_t *brdp;
2756 stlconf_t *confp;
2757 int i;
2758
2759#ifdef DEBUG
2760 printk("stl_initbrds()\n");
2761#endif
2762
2763 if (stl_nrbrds > STL_MAXBRDS) {
2764 printk("STALLION: too many boards in configuration table, "
2765 "truncating to %d\n", STL_MAXBRDS);
2766 stl_nrbrds = STL_MAXBRDS;
2767 }
2768
2769/*
2770 * Firstly scan the list of static boards configured. Allocate
2771 * resources and initialize the boards as found.
2772 */
2773 for (i = 0; (i < stl_nrbrds); i++) {
2774 confp = &stl_brdconf[i];
2775 stl_parsebrd(confp, stl_brdsp[i]);
2776 if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL)
2777 return(-ENOMEM);
2778 brdp->brdnr = i;
2779 brdp->brdtype = confp->brdtype;
2780 brdp->ioaddr1 = confp->ioaddr1;
2781 brdp->ioaddr2 = confp->ioaddr2;
2782 brdp->irq = confp->irq;
2783 brdp->irqtype = confp->irqtype;
2784 stl_brdinit(brdp);
2785 }
2786
2787/*
2788 * Find any dynamically supported boards. That is via module load
2789 * line options or auto-detected on the PCI bus.
2790 */
2791 stl_argbrds();
2792#ifdef CONFIG_PCI
2793 stl_findpcibrds();
2794#endif
2795
2796 return(0);
2797}
2798
2799/*****************************************************************************/
2800
2801/*
2802 * Return the board stats structure to user app.
2803 */
2804
2805static int stl_getbrdstats(combrd_t __user *bp)
2806{
2807 stlbrd_t *brdp;
2808 stlpanel_t *panelp;
2809 int i;
2810
2811 if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t)))
2812 return -EFAULT;
2813 if (stl_brdstats.brd >= STL_MAXBRDS)
2814 return(-ENODEV);
2815 brdp = stl_brds[stl_brdstats.brd];
2816 if (brdp == (stlbrd_t *) NULL)
2817 return(-ENODEV);
2818
2819 memset(&stl_brdstats, 0, sizeof(combrd_t));
2820 stl_brdstats.brd = brdp->brdnr;
2821 stl_brdstats.type = brdp->brdtype;
2822 stl_brdstats.hwid = brdp->hwid;
2823 stl_brdstats.state = brdp->state;
2824 stl_brdstats.ioaddr = brdp->ioaddr1;
2825 stl_brdstats.ioaddr2 = brdp->ioaddr2;
2826 stl_brdstats.irq = brdp->irq;
2827 stl_brdstats.nrpanels = brdp->nrpanels;
2828 stl_brdstats.nrports = brdp->nrports;
2829 for (i = 0; (i < brdp->nrpanels); i++) {
2830 panelp = brdp->panels[i];
2831 stl_brdstats.panels[i].panel = i;
2832 stl_brdstats.panels[i].hwid = panelp->hwid;
2833 stl_brdstats.panels[i].nrports = panelp->nrports;
2834 }
2835
2836 return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0;
2837}
2838
2839/*****************************************************************************/
2840
2841/*
2842 * Resolve the referenced port number into a port struct pointer.
2843 */
2844
2845static stlport_t *stl_getport(int brdnr, int panelnr, int portnr)
2846{
2847 stlbrd_t *brdp;
2848 stlpanel_t *panelp;
2849
2850 if ((brdnr < 0) || (brdnr >= STL_MAXBRDS))
2851 return((stlport_t *) NULL);
2852 brdp = stl_brds[brdnr];
2853 if (brdp == (stlbrd_t *) NULL)
2854 return((stlport_t *) NULL);
2855 if ((panelnr < 0) || (panelnr >= brdp->nrpanels))
2856 return((stlport_t *) NULL);
2857 panelp = brdp->panels[panelnr];
2858 if (panelp == (stlpanel_t *) NULL)
2859 return((stlport_t *) NULL);
2860 if ((portnr < 0) || (portnr >= panelp->nrports))
2861 return((stlport_t *) NULL);
2862 return(panelp->ports[portnr]);
2863}
2864
2865/*****************************************************************************/
2866
2867/*
2868 * Return the port stats structure to user app. A NULL port struct
2869 * pointer passed in means that we need to find out from the app
2870 * what port to get stats for (used through board control device).
2871 */
2872
2873static int stl_getportstats(stlport_t *portp, comstats_t __user *cp)
2874{
2875 unsigned char *head, *tail;
2876 unsigned long flags;
2877
2878 if (!portp) {
2879 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2880 return -EFAULT;
2881 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2882 stl_comstats.port);
2883 if (portp == (stlport_t *) NULL)
2884 return(-ENODEV);
2885 }
2886
2887 portp->stats.state = portp->istate;
2888 portp->stats.flags = portp->flags;
2889 portp->stats.hwid = portp->hwid;
2890
2891 portp->stats.ttystate = 0;
2892 portp->stats.cflags = 0;
2893 portp->stats.iflags = 0;
2894 portp->stats.oflags = 0;
2895 portp->stats.lflags = 0;
2896 portp->stats.rxbuffered = 0;
2897
2898 save_flags(flags);
2899 cli();
2900 if (portp->tty != (struct tty_struct *) NULL) {
2901 if (portp->tty->driver_data == portp) {
2902 portp->stats.ttystate = portp->tty->flags;
33f0f88f
AC		 2903 /* No longer available as a statistic */
2904 portp->stats.rxbuffered = 1; /*portp->tty->flip.count; */
1da177e4
LT		 2905 if (portp->tty->termios != (struct termios *) NULL) {
2906 portp->stats.cflags = portp->tty->termios->c_cflag;
2907 portp->stats.iflags = portp->tty->termios->c_iflag;
2908 portp->stats.oflags = portp->tty->termios->c_oflag;
2909 portp->stats.lflags = portp->tty->termios->c_lflag;
2910 }
2911 }
2912 }
2913 restore_flags(flags);
2914
2915 head = portp->tx.head;
2916 tail = portp->tx.tail;
2917 portp->stats.txbuffered = ((head >= tail) ? (head - tail) :
2918 (STL_TXBUFSIZE - (tail - head)));
2919
2920 portp->stats.signals = (unsigned long) stl_getsignals(portp);
2921
2922 return copy_to_user(cp, &portp->stats,
2923 sizeof(comstats_t)) ? -EFAULT : 0;
2924}
2925
2926/*****************************************************************************/
2927
2928/*
2929 * Clear the port stats structure. We also return it zeroed out...
2930 */
2931
2932static int stl_clrportstats(stlport_t *portp, comstats_t __user *cp)
2933{
2934 if (!portp) {
2935 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2936 return -EFAULT;
2937 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2938 stl_comstats.port);
2939 if (portp == (stlport_t *) NULL)
2940 return(-ENODEV);
2941 }
2942
2943 memset(&portp->stats, 0, sizeof(comstats_t));
2944 portp->stats.brd = portp->brdnr;
2945 portp->stats.panel = portp->panelnr;
2946 portp->stats.port = portp->portnr;
2947 return copy_to_user(cp, &portp->stats,
2948 sizeof(comstats_t)) ? -EFAULT : 0;
2949}
2950
2951/*****************************************************************************/
2952
2953/*
2954 * Return the entire driver ports structure to a user app.
2955 */
2956
2957static int stl_getportstruct(stlport_t __user *arg)
2958{
2959 stlport_t *portp;
2960
2961 if (copy_from_user(&stl_dummyport, arg, sizeof(stlport_t)))
2962 return -EFAULT;
2963 portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr,
2964 stl_dummyport.portnr);
2965 if (!portp)
2966 return -ENODEV;
2967 return copy_to_user(arg, portp, sizeof(stlport_t)) ? -EFAULT : 0;
2968}
2969
2970/*****************************************************************************/
2971
2972/*
2973 * Return the entire driver board structure to a user app.
2974 */
2975
2976static int stl_getbrdstruct(stlbrd_t __user *arg)
2977{
2978 stlbrd_t *brdp;
2979
2980 if (copy_from_user(&stl_dummybrd, arg, sizeof(stlbrd_t)))
2981 return -EFAULT;
2982 if ((stl_dummybrd.brdnr < 0) || (stl_dummybrd.brdnr >= STL_MAXBRDS))
2983 return -ENODEV;
2984 brdp = stl_brds[stl_dummybrd.brdnr];
2985 if (!brdp)
2986 return(-ENODEV);
2987 return copy_to_user(arg, brdp, sizeof(stlbrd_t)) ? -EFAULT : 0;
2988}
2989
2990/*****************************************************************************/
2991
2992/*
2993 * The "staliomem" device is also required to do some special operations
2994 * on the board and/or ports. In this driver it is mostly used for stats
2995 * collection.
2996 */
2997
2998static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg)
2999{
3000 int brdnr, rc;
3001 void __user *argp = (void __user *)arg;
3002
3003#ifdef DEBUG
3004 printk("stl_memioctl(ip=%x,fp=%x,cmd=%x,arg=%x)\n", (int) ip,
3005 (int) fp, cmd, (int) arg);
3006#endif
3007
3008 brdnr = iminor(ip);
3009 if (brdnr >= STL_MAXBRDS)
3010 return(-ENODEV);
3011 rc = 0;
3012
3013 switch (cmd) {
3014 case COM_GETPORTSTATS:
3015 rc = stl_getportstats(NULL, argp);
3016 break;
3017 case COM_CLRPORTSTATS:
3018 rc = stl_clrportstats(NULL, argp);
3019 break;
3020 case COM_GETBRDSTATS:
3021 rc = stl_getbrdstats(argp);
3022 break;
3023 case COM_READPORT:
3024 rc = stl_getportstruct(argp);
3025 break;
3026 case COM_READBOARD:
3027 rc = stl_getbrdstruct(argp);
3028 break;
3029 default:
3030 rc = -ENOIOCTLCMD;
3031 break;
3032 }
3033
3034 return(rc);
3035}
3036
3037static struct tty_operations stl_ops = {
3038 .open = stl_open,
3039 .close = stl_close,
3040 .write = stl_write,
3041 .put_char = stl_putchar,
3042 .flush_chars = stl_flushchars,
3043 .write_room = stl_writeroom,
3044 .chars_in_buffer = stl_charsinbuffer,
3045 .ioctl = stl_ioctl,
3046 .set_termios = stl_settermios,
3047 .throttle = stl_throttle,
3048 .unthrottle = stl_unthrottle,
3049 .stop = stl_stop,
3050 .start = stl_start,
3051 .hangup = stl_hangup,
3052 .flush_buffer = stl_flushbuffer,
3053 .break_ctl = stl_breakctl,
3054 .wait_until_sent = stl_waituntilsent,
3055 .send_xchar = stl_sendxchar,
3056 .read_proc = stl_readproc,
3057 .tiocmget = stl_tiocmget,
3058 .tiocmset = stl_tiocmset,
3059};
3060
3061/*****************************************************************************/
3062
408b664a 3063static int __init stl_init(void)
1da177e4
LT		 3064{
3065 int i;
3066 printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion);
3067
3068 stl_initbrds();
3069
3070 stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS);
3071 if (!stl_serial)
3072 return -1;
3073
3074/*
3075 * Allocate a temporary write buffer.
3076 */
3077 stl_tmpwritebuf = (char *) stl_memalloc(STL_TXBUFSIZE);
3078 if (stl_tmpwritebuf == (char *) NULL)
3079 printk("STALLION: failed to allocate memory (size=%d)\n",
3080 STL_TXBUFSIZE);
3081
3082/*
3083 * Set up a character driver for per board stuff. This is mainly used
3084 * to do stats ioctls on the ports.
3085 */
3086 if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem))
3087 printk("STALLION: failed to register serial board device\n");
3088 devfs_mk_dir("staliomem");
3089
ca8eca68 3090 stallion_class = class_create(THIS_MODULE, "staliomem");
1da177e4
LT		 3091 for (i = 0; i < 4; i++) {
3092 devfs_mk_cdev(MKDEV(STL_SIOMEMMAJOR, i),
3093 S_IFCHR|S_IRUSR|S_IWUSR,
3094 "staliomem/%d", i);
53f46542
GKH		 3095 class_device_create(stallion_class, NULL,
3096 MKDEV(STL_SIOMEMMAJOR, i), NULL,
3097 "staliomem%d", i);
1da177e4
LT		 3098 }
3099
3100 stl_serial->owner = THIS_MODULE;
3101 stl_serial->driver_name = stl_drvname;
3102 stl_serial->name = "ttyE";
3103 stl_serial->devfs_name = "tts/E";
3104 stl_serial->major = STL_SERIALMAJOR;
3105 stl_serial->minor_start = 0;
3106 stl_serial->type = TTY_DRIVER_TYPE_SERIAL;
3107 stl_serial->subtype = SERIAL_TYPE_NORMAL;
3108 stl_serial->init_termios = stl_deftermios;
3109 stl_serial->flags = TTY_DRIVER_REAL_RAW;
3110 tty_set_operations(stl_serial, &stl_ops);
3111
3112 if (tty_register_driver(stl_serial)) {
3113 put_tty_driver(stl_serial);
3114 printk("STALLION: failed to register serial driver\n");
3115 return -1;
3116 }
3117
014c2544 3118 return 0;
1da177e4
LT		 3119}
3120
3121/*****************************************************************************/
3122/* CD1400 HARDWARE FUNCTIONS */
3123/*****************************************************************************/
3124
3125/*
3126 * These functions get/set/update the registers of the cd1400 UARTs.
3127 * Access to the cd1400 registers is via an address/data io port pair.
3128 * (Maybe should make this inline...)
3129 */
3130
3131static int stl_cd1400getreg(stlport_t *portp, int regnr)
3132{
3133 outb((regnr + portp->uartaddr), portp->ioaddr);
014c2544 3134 return inb(portp->ioaddr + EREG_DATA);
1da177e4
LT		 3135}
3136
3137static void stl_cd1400setreg(stlport_t *portp, int regnr, int value)
3138{
3139 outb((regnr + portp->uartaddr), portp->ioaddr);
3140 outb(value, portp->ioaddr + EREG_DATA);
3141}
3142
3143static int stl_cd1400updatereg(stlport_t *portp, int regnr, int value)
3144{
3145 outb((regnr + portp->uartaddr), portp->ioaddr);
3146 if (inb(portp->ioaddr + EREG_DATA) != value) {
3147 outb(value, portp->ioaddr + EREG_DATA);
014c2544 3148 return 1;
1da177e4 3149 }
014c2544 3150 return 0;
1da177e4
LT		 3151}
3152
3153/*****************************************************************************/
3154
3155/*
3156 * Inbitialize the UARTs in a panel. We don't care what sort of board
3157 * these ports are on - since the port io registers are almost
3158 * identical when dealing with ports.
3159 */
3160
3161static int stl_cd1400panelinit(stlbrd_t *brdp, stlpanel_t *panelp)
3162{
3163 unsigned int gfrcr;
3164 int chipmask, i, j;
3165 int nrchips, uartaddr, ioaddr;
3166
3167#ifdef DEBUG
3168 printk("stl_panelinit(brdp=%x,panelp=%x)\n", (int) brdp, (int) panelp);
3169#endif
3170
3171 BRDENABLE(panelp->brdnr, panelp->pagenr);
3172
3173/*
3174 * Check that each chip is present and started up OK.
3175 */
3176 chipmask = 0;
3177 nrchips = panelp->nrports / CD1400_PORTS;
3178 for (i = 0; (i < nrchips); i++) {
3179 if (brdp->brdtype == BRD_ECHPCI) {
3180 outb((panelp->pagenr + (i >> 1)), brdp->ioctrl);
3181 ioaddr = panelp->iobase;
3182 } else {
3183 ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1));
3184 }
3185 uartaddr = (i & 0x01) ? 0x080 : 0;
3186 outb((GFRCR + uartaddr), ioaddr);
3187 outb(0, (ioaddr + EREG_DATA));
3188 outb((CCR + uartaddr), ioaddr);
3189 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
3190 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
3191 outb((GFRCR + uartaddr), ioaddr);
3192 for (j = 0; (j < CCR_MAXWAIT); j++) {
3193 if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0)
3194 break;
3195 }
3196 if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) {
3197 printk("STALLION: cd1400 not responding, "
3198 "brd=%d panel=%d chip=%d\n",
3199 panelp->brdnr, panelp->panelnr, i);
3200 continue;
3201 }
3202 chipmask |= (0x1 << i);
3203 outb((PPR + uartaddr), ioaddr);
3204 outb(PPR_SCALAR, (ioaddr + EREG_DATA));
3205 }
3206
3207 BRDDISABLE(panelp->brdnr);
014c2544 3208 return chipmask;
1da177e4
LT		 3209}
3210
3211/*****************************************************************************/
3212
3213/*
3214 * Initialize hardware specific port registers.
3215 */
3216
3217static void stl_cd1400portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp)
3218{
3219#ifdef DEBUG
3220 printk("stl_cd1400portinit(brdp=%x,panelp=%x,portp=%x)\n",
3221 (int) brdp, (int) panelp, (int) portp);
3222#endif
3223
3224 if ((brdp == (stlbrd_t *) NULL) || (panelp == (stlpanel_t *) NULL) ||
3225 (portp == (stlport_t *) NULL))
3226 return;
3227
3228 portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) ||
3229 (portp->portnr < 8)) ? 0 : EREG_BANKSIZE);
3230 portp->uartaddr = (portp->portnr & 0x04) << 5;
3231 portp->pagenr = panelp->pagenr + (portp->portnr >> 3);
3232
3233 BRDENABLE(portp->brdnr, portp->pagenr);
3234 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3235 stl_cd1400setreg(portp, LIVR, (portp->portnr << 3));
3236 portp->hwid = stl_cd1400getreg(portp, GFRCR);
3237 BRDDISABLE(portp->brdnr);
3238}
3239
3240/*****************************************************************************/
3241
3242/*
3243 * Wait for the command register to be ready. We will poll this,
3244 * since it won't usually take too long to be ready.
3245 */
3246
3247static void stl_cd1400ccrwait(stlport_t *portp)
3248{
3249 int i;
3250
3251 for (i = 0; (i < CCR_MAXWAIT); i++) {
3252 if (stl_cd1400getreg(portp, CCR) == 0) {
3253 return;
3254 }
3255 }
3256
3257 printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n",
3258 portp->portnr, portp->panelnr, portp->brdnr);
3259}
3260
3261/*****************************************************************************/
3262
3263/*
3264 * Set up the cd1400 registers for a port based on the termios port
3265 * settings.
3266 */
3267
3268static void stl_cd1400setport(stlport_t *portp, struct termios *tiosp)
3269{
3270 stlbrd_t *brdp;
3271 unsigned long flags;
3272 unsigned int clkdiv, baudrate;
3273 unsigned char cor1, cor2, cor3;
3274 unsigned char cor4, cor5, ccr;
3275 unsigned char srer, sreron, sreroff;
3276 unsigned char mcor1, mcor2, rtpr;
3277 unsigned char clk, div;
3278
3279 cor1 = 0;
3280 cor2 = 0;
3281 cor3 = 0;
3282 cor4 = 0;
3283 cor5 = 0;
3284 ccr = 0;
3285 rtpr = 0;
3286 clk = 0;
3287 div = 0;
3288 mcor1 = 0;
3289 mcor2 = 0;
3290 sreron = 0;
3291 sreroff = 0;
3292
3293 brdp = stl_brds[portp->brdnr];
3294 if (brdp == (stlbrd_t *) NULL)
3295 return;
3296
3297/*
3298 * Set up the RX char ignore mask with those RX error types we
3299 * can ignore. We can get the cd1400 to help us out a little here,
3300 * it will ignore parity errors and breaks for us.
3301 */
3302 portp->rxignoremsk = 0;
3303 if (tiosp->c_iflag & IGNPAR) {
3304 portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN);
3305 cor1 |= COR1_PARIGNORE;
3306 }
3307 if (tiosp->c_iflag & IGNBRK) {
3308 portp->rxignoremsk |= ST_BREAK;
3309 cor4 |= COR4_IGNBRK;
3310 }
3311
3312 portp->rxmarkmsk = ST_OVERRUN;
3313 if (tiosp->c_iflag & (INPCK | PARMRK))
3314 portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING);
3315 if (tiosp->c_iflag & BRKINT)
3316 portp->rxmarkmsk |= ST_BREAK;
3317
3318/*
3319 * Go through the char size, parity and stop bits and set all the
3320 * option register appropriately.
3321 */
3322 switch (tiosp->c_cflag & CSIZE) {
3323 case CS5:
3324 cor1 |= COR1_CHL5;
3325 break;
3326 case CS6:
3327 cor1 |= COR1_CHL6;
3328 break;
3329 case CS7:
3330 cor1 |= COR1_CHL7;
3331 break;
3332 default:
3333 cor1 |= COR1_CHL8;
3334 break;
3335 }
3336
3337 if (tiosp->c_cflag & CSTOPB)
3338 cor1 |= COR1_STOP2;
3339 else
3340 cor1 |= COR1_STOP1;
3341
3342 if (tiosp->c_cflag & PARENB) {
3343 if (tiosp->c_cflag & PARODD)
3344 cor1 |= (COR1_PARENB | COR1_PARODD);
3345 else
3346 cor1 |= (COR1_PARENB | COR1_PAREVEN);
3347 } else {
3348 cor1 |= COR1_PARNONE;
3349 }
3350
3351/*
3352 * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing
3353 * space for hardware flow control and the like. This should be set to
3354 * VMIN. Also here we will set the RX data timeout to 10ms - this should
3355 * really be based on VTIME.
3356 */
3357 cor3 |= FIFO_RXTHRESHOLD;
3358 rtpr = 2;
3359
3360/*
3361 * Calculate the baud rate timers. For now we will just assume that
3362 * the input and output baud are the same. Could have used a baud
3363 * table here, but this way we can generate virtually any baud rate
3364 * we like!
3365 */
3366 baudrate = tiosp->c_cflag & CBAUD;
3367 if (baudrate & CBAUDEX) {
3368 baudrate &= ~CBAUDEX;
3369 if ((baudrate < 1) || (baudrate > 4))
3370 tiosp->c_cflag &= ~CBAUDEX;
3371 else
3372 baudrate += 15;
3373 }
3374 baudrate = stl_baudrates[baudrate];
3375 if ((tiosp->c_cflag & CBAUD) == B38400) {
3376 if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3377 baudrate = 57600;
3378 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3379 baudrate = 115200;
3380 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3381 baudrate = 230400;
3382 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3383 baudrate = 460800;
3384 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
3385 baudrate = (portp->baud_base / portp->custom_divisor);
3386 }
3387 if (baudrate > STL_CD1400MAXBAUD)
3388 baudrate = STL_CD1400MAXBAUD;
3389
3390 if (baudrate > 0) {
3391 for (clk = 0; (clk < CD1400_NUMCLKS); clk++) {
3392 clkdiv = ((portp->clk / stl_cd1400clkdivs[clk]) / baudrate);
3393 if (clkdiv < 0x100)
3394 break;
3395 }
3396 div = (unsigned char) clkdiv;
3397 }
3398
3399/*
3400 * Check what form of modem signaling is required and set it up.
3401 */
3402 if ((tiosp->c_cflag & CLOCAL) == 0) {
3403 mcor1 |= MCOR1_DCD;
3404 mcor2 |= MCOR2_DCD;
3405 sreron |= SRER_MODEM;
3406 portp->flags |= ASYNC_CHECK_CD;
3407 } else {
3408 portp->flags &= ~ASYNC_CHECK_CD;
3409 }
3410
3411/*
3412 * Setup cd1400 enhanced modes if we can. In particular we want to
3413 * handle as much of the flow control as possible automatically. As
3414 * well as saving a few CPU cycles it will also greatly improve flow
3415 * control reliability.
3416 */
3417 if (tiosp->c_iflag & IXON) {
3418 cor2 |= COR2_TXIBE;
3419 cor3 |= COR3_SCD12;
3420 if (tiosp->c_iflag & IXANY)
3421 cor2 |= COR2_IXM;
3422 }
3423
3424 if (tiosp->c_cflag & CRTSCTS) {
3425 cor2 |= COR2_CTSAE;
3426 mcor1 |= FIFO_RTSTHRESHOLD;
3427 }
3428
3429/*
3430 * All cd1400 register values calculated so go through and set
3431 * them all up.
3432 */
3433
3434#ifdef DEBUG
3435 printk("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3436 portp->portnr, portp->panelnr, portp->brdnr);
3437 printk(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n",
3438 cor1, cor2, cor3, cor4, cor5);
3439 printk(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n",
3440 mcor1, mcor2, rtpr, sreron, sreroff);
3441 printk(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div);
3442 printk(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3443 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
3444 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
3445#endif
3446
3447 save_flags(flags);
3448 cli();
3449 BRDENABLE(portp->brdnr, portp->pagenr);
3450 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3));
3451 srer = stl_cd1400getreg(portp, SRER);
3452 stl_cd1400setreg(portp, SRER, 0);
3453 if (stl_cd1400updatereg(portp, COR1, cor1))
3454 ccr = 1;
3455 if (stl_cd1400updatereg(portp, COR2, cor2))
3456 ccr = 1;
3457 if (stl_cd1400updatereg(portp, COR3, cor3))
3458 ccr = 1;
3459 if (ccr) {
3460 stl_cd1400ccrwait(portp);
3461 stl_cd1400setreg(portp, CCR, CCR_CORCHANGE);
3462 }
3463 stl_cd1400setreg(portp, COR4, cor4);
3464 stl_cd1400setreg(portp, COR5, cor5);
3465 stl_cd1400setreg(portp, MCOR1, mcor1);
3466 stl_cd1400setreg(portp, MCOR2, mcor2);
3467 if (baudrate > 0) {
3468 stl_cd1400setreg(portp, TCOR, clk);
3469 stl_cd1400setreg(portp, TBPR, div);
3470 stl_cd1400setreg(portp, RCOR, clk);
3471 stl_cd1400setreg(portp, RBPR, div);
3472 }
3473 stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]);
3474 stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]);
3475 stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]);
3476 stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]);
3477 stl_cd1400setreg(portp, RTPR, rtpr);
3478 mcor1 = stl_cd1400getreg(portp, MSVR1);
3479 if (mcor1 & MSVR1_DCD)
3480 portp->sigs |= TIOCM_CD;
3481 else
3482 portp->sigs &= ~TIOCM_CD;
3483 stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron));
3484 BRDDISABLE(portp->brdnr);
3485 restore_flags(flags);
3486}
3487
3488/*****************************************************************************/
3489
3490/*
3491 * Set the state of the DTR and RTS signals.
3492 */
3493
3494static void stl_cd1400setsignals(stlport_t *portp, int dtr, int rts)
3495{
3496 unsigned char msvr1, msvr2;
3497 unsigned long flags;
3498
3499#ifdef DEBUG
3500 printk("stl_cd1400setsignals(portp=%x,dtr=%d,rts=%d)\n",
3501 (int) portp, dtr, rts);
3502#endif
3503
3504 msvr1 = 0;
3505 msvr2 = 0;
3506 if (dtr > 0)
3507 msvr1 = MSVR1_DTR;
3508 if (rts > 0)
3509 msvr2 = MSVR2_RTS;
3510
3511 save_flags(flags);
3512 cli();
3513 BRDENABLE(portp->brdnr, portp->pagenr);
3514 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3515 if (rts >= 0)
3516 stl_cd1400setreg(portp, MSVR2, msvr2);
3517 if (dtr >= 0)
3518 stl_cd1400setreg(portp, MSVR1, msvr1);
3519 BRDDISABLE(portp->brdnr);
3520 restore_flags(flags);
3521}
3522
3523/*****************************************************************************/
3524
3525/*
3526 * Return the state of the signals.
3527 */
3528
3529static int stl_cd1400getsignals(stlport_t *portp)
3530{
3531 unsigned char msvr1, msvr2;
3532 unsigned long flags;
3533 int sigs;
3534
3535#ifdef DEBUG
3536 printk("stl_cd1400getsignals(portp=%x)\n", (int) portp);
3537#endif
3538
3539 save_flags(flags);
3540 cli();
3541 BRDENABLE(portp->brdnr, portp->pagenr);
3542 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3543 msvr1 = stl_cd1400getreg(portp, MSVR1);
3544 msvr2 = stl_cd1400getreg(portp, MSVR2);
3545 BRDDISABLE(portp->brdnr);
3546 restore_flags(flags);
3547
3548 sigs = 0;
3549 sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0;
3550 sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0;
3551 sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0;
3552 sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0;
3553#if 0
3554 sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0;
3555 sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0;
3556#else
3557 sigs |= TIOCM_DSR;
3558#endif
014c2544 3559 return sigs;
1da177e4
LT		 3560}
3561
3562/*****************************************************************************/
3563
3564/*
3565 * Enable/Disable the Transmitter and/or Receiver.
3566 */
3567
3568static void stl_cd1400enablerxtx(stlport_t *portp, int rx, int tx)
3569{
3570 unsigned char ccr;
3571 unsigned long flags;
3572
3573#ifdef DEBUG
3574 printk("stl_cd1400enablerxtx(portp=%x,rx=%d,tx=%d)\n",
3575 (int) portp, rx, tx);
3576#endif
3577 ccr = 0;
3578
3579 if (tx == 0)
3580 ccr |= CCR_TXDISABLE;
3581 else if (tx > 0)
3582 ccr |= CCR_TXENABLE;
3583 if (rx == 0)
3584 ccr |= CCR_RXDISABLE;
3585 else if (rx > 0)
3586 ccr |= CCR_RXENABLE;
3587
3588 save_flags(flags);
3589 cli();
3590 BRDENABLE(portp->brdnr, portp->pagenr);
3591 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3592 stl_cd1400ccrwait(portp);
3593 stl_cd1400setreg(portp, CCR, ccr);
3594 stl_cd1400ccrwait(portp);
3595 BRDDISABLE(portp->brdnr);
3596 restore_flags(flags);
3597}
3598
3599/*****************************************************************************/
3600
3601/*
3602 * Start/stop the Transmitter and/or Receiver.
3603 */
3604
3605static void stl_cd1400startrxtx(stlport_t *portp, int rx, int tx)
3606{
3607 unsigned char sreron, sreroff;
3608 unsigned long flags;
3609
3610#ifdef DEBUG
3611 printk("stl_cd1400startrxtx(portp=%x,rx=%d,tx=%d)\n",
3612 (int) portp, rx, tx);
3613#endif
3614
3615 sreron = 0;
3616 sreroff = 0;
3617 if (tx == 0)
3618 sreroff |= (SRER_TXDATA | SRER_TXEMPTY);
3619 else if (tx == 1)
3620 sreron |= SRER_TXDATA;
3621 else if (tx >= 2)
3622 sreron |= SRER_TXEMPTY;
3623 if (rx == 0)
3624 sreroff |= SRER_RXDATA;
3625 else if (rx > 0)
3626 sreron |= SRER_RXDATA;
3627
3628 save_flags(flags);
3629 cli();
3630 BRDENABLE(portp->brdnr, portp->pagenr);
3631 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3632 stl_cd1400setreg(portp, SRER,
3633 ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron));
3634 BRDDISABLE(portp->brdnr);
3635 if (tx > 0)
3636 set_bit(ASYI_TXBUSY, &portp->istate);
3637 restore_flags(flags);
3638}
3639
3640/*****************************************************************************/
3641
3642/*
3643 * Disable all interrupts from this port.
3644 */
3645
3646static void stl_cd1400disableintrs(stlport_t *portp)
3647{
3648 unsigned long flags;
3649
3650#ifdef DEBUG
3651 printk("stl_cd1400disableintrs(portp=%x)\n", (int) portp);
3652#endif
3653 save_flags(flags);
3654 cli();
3655 BRDENABLE(portp->brdnr, portp->pagenr);
3656 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3657 stl_cd1400setreg(portp, SRER, 0);
3658 BRDDISABLE(portp->brdnr);
3659 restore_flags(flags);
3660}
3661
3662/*****************************************************************************/
3663
3664static void stl_cd1400sendbreak(stlport_t *portp, int len)
3665{
3666 unsigned long flags;
3667
3668#ifdef DEBUG
3669 printk("stl_cd1400sendbreak(portp=%x,len=%d)\n", (int) portp, len);
3670#endif
3671
3672 save_flags(flags);
3673 cli();
3674 BRDENABLE(portp->brdnr, portp->pagenr);
3675 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3676 stl_cd1400setreg(portp, SRER,
3677 ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) |
3678 SRER_TXEMPTY));
3679 BRDDISABLE(portp->brdnr);
3680 portp->brklen = len;
3681 if (len == 1)
3682 portp->stats.txbreaks++;
3683 restore_flags(flags);
3684}
3685
3686/*****************************************************************************/
3687
3688/*
3689 * Take flow control actions...
3690 */
3691
3692static void stl_cd1400flowctrl(stlport_t *portp, int state)
3693{
3694 struct tty_struct *tty;
3695 unsigned long flags;
3696
3697#ifdef DEBUG
3698 printk("stl_cd1400flowctrl(portp=%x,state=%x)\n", (int) portp, state);
3699#endif
3700
3701 if (portp == (stlport_t *) NULL)
3702 return;
3703 tty = portp->tty;
3704 if (tty == (struct tty_struct *) NULL)
3705 return;
3706
3707 save_flags(flags);
3708 cli();
3709 BRDENABLE(portp->brdnr, portp->pagenr);
3710 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3711
3712 if (state) {
3713 if (tty->termios->c_iflag & IXOFF) {
3714 stl_cd1400ccrwait(portp);
3715 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3716 portp->stats.rxxon++;
3717 stl_cd1400ccrwait(portp);
3718 }
3719/*
3720 * Question: should we return RTS to what it was before? It may
3721 * have been set by an ioctl... Suppose not, since if you have
3722 * hardware flow control set then it is pretty silly to go and
3723 * set the RTS line by hand.
3724 */
3725 if (tty->termios->c_cflag & CRTSCTS) {
3726 stl_cd1400setreg(portp, MCOR1,
3727 (stl_cd1400getreg(portp, MCOR1) |
3728 FIFO_RTSTHRESHOLD));
3729 stl_cd1400setreg(portp, MSVR2, MSVR2_RTS);
3730 portp->stats.rxrtson++;
3731 }
3732 } else {
3733 if (tty->termios->c_iflag & IXOFF) {
3734 stl_cd1400ccrwait(portp);
3735 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3736 portp->stats.rxxoff++;
3737 stl_cd1400ccrwait(portp);
3738 }
3739 if (tty->termios->c_cflag & CRTSCTS) {
3740 stl_cd1400setreg(portp, MCOR1,
3741 (stl_cd1400getreg(portp, MCOR1) & 0xf0));
3742 stl_cd1400setreg(portp, MSVR2, 0);
3743 portp->stats.rxrtsoff++;
3744 }
3745 }
3746
3747 BRDDISABLE(portp->brdnr);
3748 restore_flags(flags);
3749}
3750
3751/*****************************************************************************/
3752
3753/*
3754 * Send a flow control character...
3755 */
3756
3757static void stl_cd1400sendflow(stlport_t *portp, int state)
3758{
3759 struct tty_struct *tty;
3760 unsigned long flags;
3761
3762#ifdef DEBUG
3763 printk("stl_cd1400sendflow(portp=%x,state=%x)\n", (int) portp, state);
3764#endif
3765
3766 if (portp == (stlport_t *) NULL)
3767 return;
3768 tty = portp->tty;
3769 if (tty == (struct tty_struct *) NULL)
3770 return;
3771
3772 save_flags(flags);
3773 cli();
3774 BRDENABLE(portp->brdnr, portp->pagenr);
3775 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3776 if (state) {
3777 stl_cd1400ccrwait(portp);
3778 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3779 portp->stats.rxxon++;
3780 stl_cd1400ccrwait(portp);
3781 } else {
3782 stl_cd1400ccrwait(portp);
3783 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3784 portp->stats.rxxoff++;
3785 stl_cd1400ccrwait(portp);
3786 }
3787 BRDDISABLE(portp->brdnr);
3788 restore_flags(flags);
3789}
3790
3791/*****************************************************************************/
3792
3793static void stl_cd1400flush(stlport_t *portp)
3794{
3795 unsigned long flags;
3796
3797#ifdef DEBUG
3798 printk("stl_cd1400flush(portp=%x)\n", (int) portp);
3799#endif
3800
3801 if (portp == (stlport_t *) NULL)
3802 return;
3803
3804 save_flags(flags);
3805 cli();
3806 BRDENABLE(portp->brdnr, portp->pagenr);
3807 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3808 stl_cd1400ccrwait(portp);
3809 stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO);
3810 stl_cd1400ccrwait(portp);
3811 portp->tx.tail = portp->tx.head;
3812 BRDDISABLE(portp->brdnr);
3813 restore_flags(flags);
3814}
3815
3816/*****************************************************************************/
3817
3818/*
3819 * Return the current state of data flow on this port. This is only
3820 * really interresting when determining if data has fully completed
3821 * transmission or not... This is easy for the cd1400, it accurately
3822 * maintains the busy port flag.
3823 */
3824
3825static int stl_cd1400datastate(stlport_t *portp)
3826{
3827#ifdef DEBUG
3828 printk("stl_cd1400datastate(portp=%x)\n", (int) portp);
3829#endif
3830
3831 if (portp == (stlport_t *) NULL)
014c2544 3832 return 0;
1da177e4 3833
014c2544 3834 return test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0;
1da177e4
LT		 3835}
3836
3837/*****************************************************************************/
3838
3839/*
3840 * Interrupt service routine for cd1400 EasyIO boards.
3841 */
3842
3843static void stl_cd1400eiointr(stlpanel_t *panelp, unsigned int iobase)
3844{
3845 unsigned char svrtype;
3846
3847#ifdef DEBUG
3848 printk("stl_cd1400eiointr(panelp=%x,iobase=%x)\n",
3849 (int) panelp, iobase);
3850#endif
3851
3852 outb(SVRR, iobase);
3853 svrtype = inb(iobase + EREG_DATA);
3854 if (panelp->nrports > 4) {
3855 outb((SVRR + 0x80), iobase);
3856 svrtype |= inb(iobase + EREG_DATA);
3857 }
3858
3859 if (svrtype & SVRR_RX)
3860 stl_cd1400rxisr(panelp, iobase);
3861 else if (svrtype & SVRR_TX)
3862 stl_cd1400txisr(panelp, iobase);
3863 else if (svrtype & SVRR_MDM)
3864 stl_cd1400mdmisr(panelp, iobase);
3865}
3866
3867/*****************************************************************************/
3868
3869/*
3870 * Interrupt service routine for cd1400 panels.
3871 */
3872
3873static void stl_cd1400echintr(stlpanel_t *panelp, unsigned int iobase)
3874{
3875 unsigned char svrtype;
3876
3877#ifdef DEBUG
3878 printk("stl_cd1400echintr(panelp=%x,iobase=%x)\n", (int) panelp,
3879 iobase);
3880#endif
3881
3882 outb(SVRR, iobase);
3883 svrtype = inb(iobase + EREG_DATA);
3884 outb((SVRR + 0x80), iobase);
3885 svrtype |= inb(iobase + EREG_DATA);
3886 if (svrtype & SVRR_RX)
3887 stl_cd1400rxisr(panelp, iobase);
3888 else if (svrtype & SVRR_TX)
3889 stl_cd1400txisr(panelp, iobase);
3890 else if (svrtype & SVRR_MDM)
3891 stl_cd1400mdmisr(panelp, iobase);
3892}
3893
3894
3895/*****************************************************************************/
3896
3897/*
3898 * Unfortunately we need to handle breaks in the TX data stream, since
3899 * this is the only way to generate them on the cd1400.
3900 */
3901
3902static inline int stl_cd1400breakisr(stlport_t *portp, int ioaddr)
3903{
3904 if (portp->brklen == 1) {
3905 outb((COR2 + portp->uartaddr), ioaddr);
3906 outb((inb(ioaddr + EREG_DATA) | COR2_ETC),
3907 (ioaddr + EREG_DATA));
3908 outb((TDR + portp->uartaddr), ioaddr);
3909 outb(ETC_CMD, (ioaddr + EREG_DATA));
3910 outb(ETC_STARTBREAK, (ioaddr + EREG_DATA));
3911 outb((SRER + portp->uartaddr), ioaddr);
3912 outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)),
3913 (ioaddr + EREG_DATA));
014c2544 3914 return 1;
1da177e4
LT		 3915 } else if (portp->brklen > 1) {
3916 outb((TDR + portp->uartaddr), ioaddr);
3917 outb(ETC_CMD, (ioaddr + EREG_DATA));
3918 outb(ETC_STOPBREAK, (ioaddr + EREG_DATA));
3919 portp->brklen = -1;
014c2544 3920 return 1;
1da177e4
LT		 3921 } else {
3922 outb((COR2 + portp->uartaddr), ioaddr);
3923 outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC),
3924 (ioaddr + EREG_DATA));
3925 portp->brklen = 0;
3926 }
014c2544 3927 return 0;
1da177e4
LT		 3928}
3929
3930/*****************************************************************************/
3931
3932/*
3933 * Transmit interrupt handler. This has gotta be fast! Handling TX
3934 * chars is pretty simple, stuff as many as possible from the TX buffer
3935 * into the cd1400 FIFO. Must also handle TX breaks here, since they
3936 * are embedded as commands in the data stream. Oh no, had to use a goto!
3937 * This could be optimized more, will do when I get time...
3938 * In practice it is possible that interrupts are enabled but that the
3939 * port has been hung up. Need to handle not having any TX buffer here,
3940 * this is done by using the side effect that head and tail will also
3941 * be NULL if the buffer has been freed.
3942 */
3943
3944static void stl_cd1400txisr(stlpanel_t *panelp, int ioaddr)
3945{
3946 stlport_t *portp;
3947 int len, stlen;
3948 char *head, *tail;
3949 unsigned char ioack, srer;
3950
3951#ifdef DEBUG
3952 printk("stl_cd1400txisr(panelp=%x,ioaddr=%x)\n", (int) panelp, ioaddr);
3953#endif
3954
3955 ioack = inb(ioaddr + EREG_TXACK);
3956 if (((ioack & panelp->ackmask) != 0) ||
3957 ((ioack & ACK_TYPMASK) != ACK_TYPTX)) {
3958 printk("STALLION: bad TX interrupt ack value=%x\n", ioack);
3959 return;
3960 }
3961 portp = panelp->ports[(ioack >> 3)];
3962
3963/*
3964 * Unfortunately we need to handle breaks in the data stream, since
3965 * this is the only way to generate them on the cd1400. Do it now if
3966 * a break is to be sent.
3967 */
3968 if (portp->brklen != 0)
3969 if (stl_cd1400breakisr(portp, ioaddr))
3970 goto stl_txalldone;
3971
3972 head = portp->tx.head;
3973 tail = portp->tx.tail;
3974 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
3975 if ((len == 0) || ((len < STL_TXBUFLOW) &&
3976 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
3977 set_bit(ASYI_TXLOW, &portp->istate);
3978 schedule_work(&portp->tqueue);
3979 }
3980
3981 if (len == 0) {
3982 outb((SRER + portp->uartaddr), ioaddr);
3983 srer = inb(ioaddr + EREG_DATA);
3984 if (srer & SRER_TXDATA) {
3985 srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY;
3986 } else {
3987 srer &= ~(SRER_TXDATA | SRER_TXEMPTY);
3988 clear_bit(ASYI_TXBUSY, &portp->istate);
3989 }
3990 outb(srer, (ioaddr + EREG_DATA));
3991 } else {
3992 len = MIN(len, CD1400_TXFIFOSIZE);
3993 portp->stats.txtotal += len;
3994 stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail));
3995 outb((TDR + portp->uartaddr), ioaddr);
3996 outsb((ioaddr + EREG_DATA), tail, stlen);
3997 len -= stlen;
3998 tail += stlen;
3999 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
4000 tail = portp->tx.buf;
4001 if (len > 0) {
4002 outsb((ioaddr + EREG_DATA), tail, len);
4003 tail += len;
4004 }
4005 portp->tx.tail = tail;
4006 }
4007
4008stl_txalldone:
4009 outb((EOSRR + portp->uartaddr), ioaddr);
4010 outb(0, (ioaddr + EREG_DATA));
4011}
4012
4013/*****************************************************************************/
4014
4015/*
4016 * Receive character interrupt handler. Determine if we have good chars
4017 * or bad chars and then process appropriately. Good chars are easy
4018 * just shove the lot into the RX buffer and set all status byte to 0.
4019 * If a bad RX char then process as required. This routine needs to be
4020 * fast! In practice it is possible that we get an interrupt on a port
4021 * that is closed. This can happen on hangups - since they completely
4022 * shutdown a port not in user context. Need to handle this case.
4023 */
4024
4025static void stl_cd1400rxisr(stlpanel_t *panelp, int ioaddr)
4026{
4027 stlport_t *portp;
4028 struct tty_struct *tty;
4029 unsigned int ioack, len, buflen;
4030 unsigned char status;
4031 char ch;
4032
4033#ifdef DEBUG
4034 printk("stl_cd1400rxisr(panelp=%x,ioaddr=%x)\n", (int) panelp, ioaddr);
4035#endif
4036
4037 ioack = inb(ioaddr + EREG_RXACK);
4038 if ((ioack & panelp->ackmask) != 0) {
4039 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
4040 return;
4041 }
4042 portp = panelp->ports[(ioack >> 3)];
4043 tty = portp->tty;
4044
4045 if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) {
4046 outb((RDCR + portp->uartaddr), ioaddr);
4047 len = inb(ioaddr + EREG_DATA);
33f0f88f 4048 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
1da177e4
LT		 4049 len = MIN(len, sizeof(stl_unwanted));
4050 outb((RDSR + portp->uartaddr), ioaddr);
4051 insb((ioaddr + EREG_DATA), &stl_unwanted[0], len);
4052 portp->stats.rxlost += len;
4053 portp->stats.rxtotal += len;
4054 } else {
4055 len = MIN(len, buflen);
4056 if (len > 0) {
33f0f88f 4057 unsigned char *ptr;
1da177e4 4058 outb((RDSR + portp->uartaddr), ioaddr);
33f0f88f
AC		 4059 tty_prepare_flip_string(tty, &ptr, len);
4060 insb((ioaddr + EREG_DATA), ptr, len);
1da177e4
LT		 4061 tty_schedule_flip(tty);
4062 portp->stats.rxtotal += len;
4063 }
4064 }
4065 } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) {
4066 outb((RDSR + portp->uartaddr), ioaddr);
4067 status = inb(ioaddr + EREG_DATA);
4068 ch = inb(ioaddr + EREG_DATA);
4069 if (status & ST_PARITY)
4070 portp->stats.rxparity++;
4071 if (status & ST_FRAMING)
4072 portp->stats.rxframing++;
4073 if (status & ST_OVERRUN)
4074 portp->stats.rxoverrun++;
4075 if (status & ST_BREAK)
4076 portp->stats.rxbreaks++;
4077 if (status & ST_SCHARMASK) {
4078 if ((status & ST_SCHARMASK) == ST_SCHAR1)
4079 portp->stats.txxon++;
4080 if ((status & ST_SCHARMASK) == ST_SCHAR2)
4081 portp->stats.txxoff++;
4082 goto stl_rxalldone;
4083 }
33f0f88f 4084 if (tty != NULL && (portp->rxignoremsk & status) == 0) {
1da177e4
LT		 4085 if (portp->rxmarkmsk & status) {
4086 if (status & ST_BREAK) {
4087 status = TTY_BREAK;
4088 if (portp->flags & ASYNC_SAK) {
4089 do_SAK(tty);
4090 BRDENABLE(portp->brdnr, portp->pagenr);
4091 }
4092 } else if (status & ST_PARITY) {
4093 status = TTY_PARITY;
4094 } else if (status & ST_FRAMING) {
4095 status = TTY_FRAME;
4096 } else if(status & ST_OVERRUN) {
4097 status = TTY_OVERRUN;
4098 } else {
4099 status = 0;
4100 }
4101 } else {
4102 status = 0;
4103 }
33f0f88f
AC		 4104 tty_insert_flip_char(tty, ch, status);
4105 tty_schedule_flip(tty);
1da177e4
LT		 4106 }
4107 } else {
4108 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
4109 return;
4110 }
4111
4112stl_rxalldone:
4113 outb((EOSRR + portp->uartaddr), ioaddr);
4114 outb(0, (ioaddr + EREG_DATA));
4115}
4116
4117/*****************************************************************************/
4118
4119/*
4120 * Modem interrupt handler. The is called when the modem signal line
4121 * (DCD) has changed state. Leave most of the work to the off-level
4122 * processing routine.
4123 */
4124
4125static void stl_cd1400mdmisr(stlpanel_t *panelp, int ioaddr)
4126{
4127 stlport_t *portp;
4128 unsigned int ioack;
4129 unsigned char misr;
4130
4131#ifdef DEBUG
4132 printk("stl_cd1400mdmisr(panelp=%x)\n", (int) panelp);
4133#endif
4134
4135 ioack = inb(ioaddr + EREG_MDACK);
4136 if (((ioack & panelp->ackmask) != 0) ||
4137 ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) {
4138 printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack);
4139 return;
4140 }
4141 portp = panelp->ports[(ioack >> 3)];
4142
4143 outb((MISR + portp->uartaddr), ioaddr);
4144 misr = inb(ioaddr + EREG_DATA);
4145 if (misr & MISR_DCD) {
4146 set_bit(ASYI_DCDCHANGE, &portp->istate);
4147 schedule_work(&portp->tqueue);
4148 portp->stats.modem++;
4149 }
4150
4151 outb((EOSRR + portp->uartaddr), ioaddr);
4152 outb(0, (ioaddr + EREG_DATA));
4153}
4154
4155/*****************************************************************************/
4156/* SC26198 HARDWARE FUNCTIONS */
4157/*****************************************************************************/
4158
4159/*
4160 * These functions get/set/update the registers of the sc26198 UARTs.
4161 * Access to the sc26198 registers is via an address/data io port pair.
4162 * (Maybe should make this inline...)
4163 */
4164
4165static int stl_sc26198getreg(stlport_t *portp, int regnr)
4166{
4167 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
014c2544 4168 return inb(portp->ioaddr + XP_DATA);
1da177e4
LT		 4169}
4170
4171static void stl_sc26198setreg(stlport_t *portp, int regnr, int value)
4172{
4173 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
4174 outb(value, (portp->ioaddr + XP_DATA));
4175}
4176
4177static int stl_sc26198updatereg(stlport_t *portp, int regnr, int value)
4178{
4179 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
4180 if (inb(portp->ioaddr + XP_DATA) != value) {
4181 outb(value, (portp->ioaddr + XP_DATA));
014c2544 4182 return 1;
1da177e4 4183 }
014c2544 4184 return 0;
1da177e4
LT		 4185}
4186
4187/*****************************************************************************/
4188
4189/*
4190 * Functions to get and set the sc26198 global registers.
4191 */
4192
4193static int stl_sc26198getglobreg(stlport_t *portp, int regnr)
4194{
4195 outb(regnr, (portp->ioaddr + XP_ADDR));
014c2544 4196 return inb(portp->ioaddr + XP_DATA);
1da177e4
LT		 4197}
4198
4199#if 0
4200static void stl_sc26198setglobreg(stlport_t *portp, int regnr, int value)
4201{
4202 outb(regnr, (portp->ioaddr + XP_ADDR));
4203 outb(value, (portp->ioaddr + XP_DATA));
4204}
4205#endif
4206
4207/*****************************************************************************/
4208
4209/*
4210 * Inbitialize the UARTs in a panel. We don't care what sort of board
4211 * these ports are on - since the port io registers are almost
4212 * identical when dealing with ports.
4213 */
4214
4215static int stl_sc26198panelinit(stlbrd_t *brdp, stlpanel_t *panelp)
4216{
4217 int chipmask, i;
4218 int nrchips, ioaddr;
4219
4220#ifdef DEBUG
4221 printk("stl_sc26198panelinit(brdp=%x,panelp=%x)\n",
4222 (int) brdp, (int) panelp);
4223#endif
4224
4225 BRDENABLE(panelp->brdnr, panelp->pagenr);
4226
4227/*
4228 * Check that each chip is present and started up OK.
4229 */
4230 chipmask = 0;
4231 nrchips = (panelp->nrports + 4) / SC26198_PORTS;
4232 if (brdp->brdtype == BRD_ECHPCI)
4233 outb(panelp->pagenr, brdp->ioctrl);
4234
4235 for (i = 0; (i < nrchips); i++) {
4236 ioaddr = panelp->iobase + (i * 4);
4237 outb(SCCR, (ioaddr + XP_ADDR));
4238 outb(CR_RESETALL, (ioaddr + XP_DATA));
4239 outb(TSTR, (ioaddr + XP_ADDR));
4240 if (inb(ioaddr + XP_DATA) != 0) {
4241 printk("STALLION: sc26198 not responding, "
4242 "brd=%d panel=%d chip=%d\n",
4243 panelp->brdnr, panelp->panelnr, i);
4244 continue;
4245 }
4246 chipmask |= (0x1 << i);
4247 outb(GCCR, (ioaddr + XP_ADDR));
4248 outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA));
4249 outb(WDTRCR, (ioaddr + XP_ADDR));
4250 outb(0xff, (ioaddr + XP_DATA));
4251 }
4252
4253 BRDDISABLE(panelp->brdnr);
014c2544 4254 return chipmask;
1da177e4
LT		 4255}
4256
4257/*****************************************************************************/
4258
4259/*
4260 * Initialize hardware specific port registers.
4261 */
4262
4263static void stl_sc26198portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp)
4264{
4265#ifdef DEBUG
4266 printk("stl_sc26198portinit(brdp=%x,panelp=%x,portp=%x)\n",
4267 (int) brdp, (int) panelp, (int) portp);
4268#endif
4269
4270 if ((brdp == (stlbrd_t *) NULL) || (panelp == (stlpanel_t *) NULL) ||
4271 (portp == (stlport_t *) NULL))
4272 return;
4273
4274 portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4);
4275 portp->uartaddr = (portp->portnr & 0x07) << 4;
4276 portp->pagenr = panelp->pagenr;
4277 portp->hwid = 0x1;
4278
4279 BRDENABLE(portp->brdnr, portp->pagenr);
4280 stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS);
4281 BRDDISABLE(portp->brdnr);
4282}
4283
4284/*****************************************************************************/
4285
4286/*
4287 * Set up the sc26198 registers for a port based on the termios port
4288 * settings.
4289 */
4290
4291static void stl_sc26198setport(stlport_t *portp, struct termios *tiosp)
4292{
4293 stlbrd_t *brdp;
4294 unsigned long flags;
4295 unsigned int baudrate;
4296 unsigned char mr0, mr1, mr2, clk;
4297 unsigned char imron, imroff, iopr, ipr;
4298
4299 mr0 = 0;
4300 mr1 = 0;
4301 mr2 = 0;
4302 clk = 0;
4303 iopr = 0;
4304 imron = 0;
4305 imroff = 0;
4306
4307 brdp = stl_brds[portp->brdnr];
4308 if (brdp == (stlbrd_t *) NULL)
4309 return;
4310
4311/*
4312 * Set up the RX char ignore mask with those RX error types we
4313 * can ignore.
4314 */
4315 portp->rxignoremsk = 0;
4316 if (tiosp->c_iflag & IGNPAR)
4317 portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING |
4318 SR_RXOVERRUN);
4319 if (tiosp->c_iflag & IGNBRK)
4320 portp->rxignoremsk |= SR_RXBREAK;
4321
4322 portp->rxmarkmsk = SR_RXOVERRUN;
4323 if (tiosp->c_iflag & (INPCK | PARMRK))
4324 portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING);
4325 if (tiosp->c_iflag & BRKINT)
4326 portp->rxmarkmsk |= SR_RXBREAK;
4327
4328/*
4329 * Go through the char size, parity and stop bits and set all the
4330 * option register appropriately.
4331 */
4332 switch (tiosp->c_cflag & CSIZE) {
4333 case CS5:
4334 mr1 |= MR1_CS5;
4335 break;
4336 case CS6:
4337 mr1 |= MR1_CS6;
4338 break;
4339 case CS7:
4340 mr1 |= MR1_CS7;
4341 break;
4342 default:
4343 mr1 |= MR1_CS8;
4344 break;
4345 }
4346
4347 if (tiosp->c_cflag & CSTOPB)
4348 mr2 |= MR2_STOP2;
4349 else
4350 mr2 |= MR2_STOP1;
4351
4352 if (tiosp->c_cflag & PARENB) {
4353 if (tiosp->c_cflag & PARODD)
4354 mr1 |= (MR1_PARENB | MR1_PARODD);
4355 else
4356 mr1 |= (MR1_PARENB | MR1_PAREVEN);
4357 } else {
4358 mr1 |= MR1_PARNONE;
4359 }
4360
4361 mr1 |= MR1_ERRBLOCK;
4362
4363/*
4364 * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing
4365 * space for hardware flow control and the like. This should be set to
4366 * VMIN.
4367 */
4368 mr2 |= MR2_RXFIFOHALF;
4369
4370/*
4371 * Calculate the baud rate timers. For now we will just assume that
4372 * the input and output baud are the same. The sc26198 has a fixed
4373 * baud rate table, so only discrete baud rates possible.
4374 */
4375 baudrate = tiosp->c_cflag & CBAUD;
4376 if (baudrate & CBAUDEX) {
4377 baudrate &= ~CBAUDEX;
4378 if ((baudrate < 1) || (baudrate > 4))
4379 tiosp->c_cflag &= ~CBAUDEX;
4380 else
4381 baudrate += 15;
4382 }
4383 baudrate = stl_baudrates[baudrate];
4384 if ((tiosp->c_cflag & CBAUD) == B38400) {
4385 if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
4386 baudrate = 57600;
4387 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
4388 baudrate = 115200;
4389 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
4390 baudrate = 230400;
4391 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
4392 baudrate = 460800;
4393 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
4394 baudrate = (portp->baud_base / portp->custom_divisor);
4395 }
4396 if (baudrate > STL_SC26198MAXBAUD)
4397 baudrate = STL_SC26198MAXBAUD;
4398
4399 if (baudrate > 0) {
4400 for (clk = 0; (clk < SC26198_NRBAUDS); clk++) {
4401 if (baudrate <= sc26198_baudtable[clk])
4402 break;
4403 }
4404 }
4405
4406/*
4407 * Check what form of modem signaling is required and set it up.
4408 */
4409 if (tiosp->c_cflag & CLOCAL) {
4410 portp->flags &= ~ASYNC_CHECK_CD;
4411 } else {
4412 iopr |= IOPR_DCDCOS;
4413 imron |= IR_IOPORT;
4414 portp->flags |= ASYNC_CHECK_CD;
4415 }
4416
4417/*
4418 * Setup sc26198 enhanced modes if we can. In particular we want to
4419 * handle as much of the flow control as possible automatically. As
4420 * well as saving a few CPU cycles it will also greatly improve flow
4421 * control reliability.
4422 */
4423 if (tiosp->c_iflag & IXON) {
4424 mr0 |= MR0_SWFTX | MR0_SWFT;
4425 imron |= IR_XONXOFF;
4426 } else {
4427 imroff |= IR_XONXOFF;
4428 }
4429 if (tiosp->c_iflag & IXOFF)
4430 mr0 |= MR0_SWFRX;
4431
4432 if (tiosp->c_cflag & CRTSCTS) {
4433 mr2 |= MR2_AUTOCTS;
4434 mr1 |= MR1_AUTORTS;
4435 }
4436
4437/*
4438 * All sc26198 register values calculated so go through and set
4439 * them all up.
4440 */
4441
4442#ifdef DEBUG
4443 printk("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
4444 portp->portnr, portp->panelnr, portp->brdnr);
4445 printk(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk);
4446 printk(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff);
4447 printk(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
4448 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
4449 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
4450#endif
4451
4452 save_flags(flags);
4453 cli();
4454 BRDENABLE(portp->brdnr, portp->pagenr);
4455 stl_sc26198setreg(portp, IMR, 0);
4456 stl_sc26198updatereg(portp, MR0, mr0);
4457 stl_sc26198updatereg(portp, MR1, mr1);
4458 stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK);
4459 stl_sc26198updatereg(portp, MR2, mr2);
4460 stl_sc26198updatereg(portp, IOPIOR,
4461 ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr));
4462
4463 if (baudrate > 0) {
4464 stl_sc26198setreg(portp, TXCSR, clk);
4465 stl_sc26198setreg(portp, RXCSR, clk);
4466 }
4467
4468 stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]);
4469 stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]);
4470
4471 ipr = stl_sc26198getreg(portp, IPR);
4472 if (ipr & IPR_DCD)
4473 portp->sigs &= ~TIOCM_CD;
4474 else
4475 portp->sigs |= TIOCM_CD;
4476
4477 portp->imr = (portp->imr & ~imroff) | imron;
4478 stl_sc26198setreg(portp, IMR, portp->imr);
4479 BRDDISABLE(portp->brdnr);
4480 restore_flags(flags);
4481}
4482
4483/*****************************************************************************/
4484
4485/*
4486 * Set the state of the DTR and RTS signals.
4487 */
4488
4489static void stl_sc26198setsignals(stlport_t *portp, int dtr, int rts)
4490{
4491 unsigned char iopioron, iopioroff;
4492 unsigned long flags;
4493
4494#ifdef DEBUG
4495 printk("stl_sc26198setsignals(portp=%x,dtr=%d,rts=%d)\n",
4496 (int) portp, dtr, rts);
4497#endif
4498
4499 iopioron = 0;
4500 iopioroff = 0;
4501 if (dtr == 0)
4502 iopioroff |= IPR_DTR;
4503 else if (dtr > 0)
4504 iopioron |= IPR_DTR;
4505 if (rts == 0)
4506 iopioroff |= IPR_RTS;
4507 else if (rts > 0)
4508 iopioron |= IPR_RTS;
4509
4510 save_flags(flags);
4511 cli();
4512 BRDENABLE(portp->brdnr, portp->pagenr);
4513 stl_sc26198setreg(portp, IOPIOR,
4514 ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron));
4515 BRDDISABLE(portp->brdnr);
4516 restore_flags(flags);
4517}
4518
4519/*****************************************************************************/
4520
4521/*
4522 * Return the state of the signals.
4523 */
4524
4525static int stl_sc26198getsignals(stlport_t *portp)
4526{
4527 unsigned char ipr;
4528 unsigned long flags;
4529 int sigs;
4530
4531#ifdef DEBUG
4532 printk("stl_sc26198getsignals(portp=%x)\n", (int) portp);
4533#endif
4534
4535 save_flags(flags);
4536 cli();
4537 BRDENABLE(portp->brdnr, portp->pagenr);
4538 ipr = stl_sc26198getreg(portp, IPR);
4539 BRDDISABLE(portp->brdnr);
4540 restore_flags(flags);
4541
4542 sigs = 0;
4543 sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD;
4544 sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS;
4545 sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR;
4546 sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS;
4547 sigs |= TIOCM_DSR;
014c2544 4548 return sigs;
1da177e4
LT		 4549}
4550
4551/*****************************************************************************/
4552
4553/*
4554 * Enable/Disable the Transmitter and/or Receiver.
4555 */
4556
4557static void stl_sc26198enablerxtx(stlport_t *portp, int rx, int tx)
4558{
4559 unsigned char ccr;
4560 unsigned long flags;
4561
4562#ifdef DEBUG
4563 printk("stl_sc26198enablerxtx(portp=%x,rx=%d,tx=%d)\n",
4564 (int) portp, rx, tx);
4565#endif
4566
4567 ccr = portp->crenable;
4568 if (tx == 0)
4569 ccr &= ~CR_TXENABLE;
4570 else if (tx > 0)
4571 ccr |= CR_TXENABLE;
4572 if (rx == 0)
4573 ccr &= ~CR_RXENABLE;
4574 else if (rx > 0)
4575 ccr |= CR_RXENABLE;
4576
4577 save_flags(flags);
4578 cli();
4579 BRDENABLE(portp->brdnr, portp->pagenr);
4580 stl_sc26198setreg(portp, SCCR, ccr);
4581 BRDDISABLE(portp->brdnr);
4582 portp->crenable = ccr;
4583 restore_flags(flags);
4584}
4585
4586/*****************************************************************************/
4587
4588/*
4589 * Start/stop the Transmitter and/or Receiver.
4590 */
4591
4592static void stl_sc26198startrxtx(stlport_t *portp, int rx, int tx)
4593{
4594 unsigned char imr;
4595 unsigned long flags;
4596
4597#ifdef DEBUG
4598 printk("stl_sc26198startrxtx(portp=%x,rx=%d,tx=%d)\n",
4599 (int) portp, rx, tx);
4600#endif
4601
4602 imr = portp->imr;
4603 if (tx == 0)
4604 imr &= ~IR_TXRDY;
4605 else if (tx == 1)
4606 imr |= IR_TXRDY;
4607 if (rx == 0)
4608 imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG);
4609 else if (rx > 0)
4610 imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG;
4611
4612 save_flags(flags);
4613 cli();
4614 BRDENABLE(portp->brdnr, portp->pagenr);
4615 stl_sc26198setreg(portp, IMR, imr);
4616 BRDDISABLE(portp->brdnr);
4617 portp->imr = imr;
4618 if (tx > 0)
4619 set_bit(ASYI_TXBUSY, &portp->istate);
4620 restore_flags(flags);
4621}
4622
4623/*****************************************************************************/
4624
4625/*
4626 * Disable all interrupts from this port.
4627 */
4628
4629static void stl_sc26198disableintrs(stlport_t *portp)
4630{
4631 unsigned long flags;
4632
4633#ifdef DEBUG
4634 printk("stl_sc26198disableintrs(portp=%x)\n", (int) portp);
4635#endif
4636
4637 save_flags(flags);
4638 cli();
4639 BRDENABLE(portp->brdnr, portp->pagenr);
4640 portp->imr = 0;
4641 stl_sc26198setreg(portp, IMR, 0);
4642 BRDDISABLE(portp->brdnr);
4643 restore_flags(flags);
4644}
4645
4646/*****************************************************************************/
4647
4648static void stl_sc26198sendbreak(stlport_t *portp, int len)
4649{
4650 unsigned long flags;
4651
4652#ifdef DEBUG
4653 printk("stl_sc26198sendbreak(portp=%x,len=%d)\n", (int) portp, len);
4654#endif
4655
4656 save_flags(flags);
4657 cli();
4658 BRDENABLE(portp->brdnr, portp->pagenr);
4659 if (len == 1) {
4660 stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK);
4661 portp->stats.txbreaks++;
4662 } else {
4663 stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK);
4664 }
4665 BRDDISABLE(portp->brdnr);
4666 restore_flags(flags);
4667}
4668
4669/*****************************************************************************/
4670
4671/*
4672 * Take flow control actions...
4673 */
4674
4675static void stl_sc26198flowctrl(stlport_t *portp, int state)
4676{
4677 struct tty_struct *tty;
4678 unsigned long flags;
4679 unsigned char mr0;
4680
4681#ifdef DEBUG
4682 printk("stl_sc26198flowctrl(portp=%x,state=%x)\n", (int) portp, state);
4683#endif
4684
4685 if (portp == (stlport_t *) NULL)
4686 return;
4687 tty = portp->tty;
4688 if (tty == (struct tty_struct *) NULL)
4689 return;
4690
4691 save_flags(flags);
4692 cli();
4693 BRDENABLE(portp->brdnr, portp->pagenr);
4694
4695 if (state) {
4696 if (tty->termios->c_iflag & IXOFF) {
4697 mr0 = stl_sc26198getreg(portp, MR0);
4698 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4699 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4700 mr0 |= MR0_SWFRX;
4701 portp->stats.rxxon++;
4702 stl_sc26198wait(portp);
4703 stl_sc26198setreg(portp, MR0, mr0);
4704 }
4705/*
4706 * Question: should we return RTS to what it was before? It may
4707 * have been set by an ioctl... Suppose not, since if you have
4708 * hardware flow control set then it is pretty silly to go and
4709 * set the RTS line by hand.
4710 */
4711 if (tty->termios->c_cflag & CRTSCTS) {
4712 stl_sc26198setreg(portp, MR1,
4713 (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS));
4714 stl_sc26198setreg(portp, IOPIOR,
4715 (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS));
4716 portp->stats.rxrtson++;
4717 }
4718 } else {
4719 if (tty->termios->c_iflag & IXOFF) {
4720 mr0 = stl_sc26198getreg(portp, MR0);
4721 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4722 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4723 mr0 &= ~MR0_SWFRX;
4724 portp->stats.rxxoff++;
4725 stl_sc26198wait(portp);
4726 stl_sc26198setreg(portp, MR0, mr0);
4727 }
4728 if (tty->termios->c_cflag & CRTSCTS) {
4729 stl_sc26198setreg(portp, MR1,
4730 (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS));
4731 stl_sc26198setreg(portp, IOPIOR,
4732 (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS));
4733 portp->stats.rxrtsoff++;
4734 }
4735 }
4736
4737 BRDDISABLE(portp->brdnr);
4738 restore_flags(flags);
4739}
4740
4741/*****************************************************************************/
4742
4743/*
4744 * Send a flow control character.
4745 */
4746
4747static void stl_sc26198sendflow(stlport_t *portp, int state)
4748{
4749 struct tty_struct *tty;
4750 unsigned long flags;
4751 unsigned char mr0;
4752
4753#ifdef DEBUG
4754 printk("stl_sc26198sendflow(portp=%x,state=%x)\n", (int) portp, state);
4755#endif
4756
4757 if (portp == (stlport_t *) NULL)
4758 return;
4759 tty = portp->tty;
4760 if (tty == (struct tty_struct *) NULL)
4761 return;
4762
4763 save_flags(flags);
4764 cli();
4765 BRDENABLE(portp->brdnr, portp->pagenr);
4766 if (state) {
4767 mr0 = stl_sc26198getreg(portp, MR0);
4768 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4769 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4770 mr0 |= MR0_SWFRX;
4771 portp->stats.rxxon++;
4772 stl_sc26198wait(portp);
4773 stl_sc26198setreg(portp, MR0, mr0);
4774 } else {
4775 mr0 = stl_sc26198getreg(portp, MR0);
4776 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4777 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4778 mr0 &= ~MR0_SWFRX;
4779 portp->stats.rxxoff++;
4780 stl_sc26198wait(portp);
4781 stl_sc26198setreg(portp, MR0, mr0);
4782 }
4783 BRDDISABLE(portp->brdnr);
4784 restore_flags(flags);
4785}
4786
4787/*****************************************************************************/
4788
4789static void stl_sc26198flush(stlport_t *portp)
4790{
4791 unsigned long flags;
4792
4793#ifdef DEBUG
4794 printk("stl_sc26198flush(portp=%x)\n", (int) portp);
4795#endif
4796
4797 if (portp == (stlport_t *) NULL)
4798 return;
4799
4800 save_flags(flags);
4801 cli();
4802 BRDENABLE(portp->brdnr, portp->pagenr);
4803 stl_sc26198setreg(portp, SCCR, CR_TXRESET);
4804 stl_sc26198setreg(portp, SCCR, portp->crenable);
4805 BRDDISABLE(portp->brdnr);
4806 portp->tx.tail = portp->tx.head;
4807 restore_flags(flags);
4808}
4809
4810/*****************************************************************************/
4811
4812/*
4813 * Return the current state of data flow on this port. This is only
4814 * really interresting when determining if data has fully completed
4815 * transmission or not... The sc26198 interrupt scheme cannot
4816 * determine when all data has actually drained, so we need to
4817 * check the port statusy register to be sure.
4818 */
4819
4820static int stl_sc26198datastate(stlport_t *portp)
4821{
4822 unsigned long flags;
4823 unsigned char sr;
4824
4825#ifdef DEBUG
4826 printk("stl_sc26198datastate(portp=%x)\n", (int) portp);
4827#endif
4828
4829 if (portp == (stlport_t *) NULL)
014c2544 4830 return 0;
1da177e4 4831 if (test_bit(ASYI_TXBUSY, &portp->istate))
014c2544 4832 return 1;
1da177e4
LT		 4833
4834 save_flags(flags);
4835 cli();
4836 BRDENABLE(portp->brdnr, portp->pagenr);
4837 sr = stl_sc26198getreg(portp, SR);
4838 BRDDISABLE(portp->brdnr);
4839 restore_flags(flags);
4840
014c2544 4841 return (sr & SR_TXEMPTY) ? 0 : 1;
1da177e4
LT		 4842}
4843
4844/*****************************************************************************/
4845
4846/*
4847 * Delay for a small amount of time, to give the sc26198 a chance
4848 * to process a command...
4849 */
4850
4851static void stl_sc26198wait(stlport_t *portp)
4852{
4853 int i;
4854
4855#ifdef DEBUG
4856 printk("stl_sc26198wait(portp=%x)\n", (int) portp);
4857#endif
4858
4859 if (portp == (stlport_t *) NULL)
4860 return;
4861
4862 for (i = 0; (i < 20); i++)
4863 stl_sc26198getglobreg(portp, TSTR);
4864}
4865
4866/*****************************************************************************/
4867
4868/*
4869 * If we are TX flow controlled and in IXANY mode then we may
4870 * need to unflow control here. We gotta do this because of the
4871 * automatic flow control modes of the sc26198.
4872 */
4873
4874static inline void stl_sc26198txunflow(stlport_t *portp, struct tty_struct *tty)
4875{
4876 unsigned char mr0;
4877
4878 mr0 = stl_sc26198getreg(portp, MR0);
4879 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4880 stl_sc26198setreg(portp, SCCR, CR_HOSTXON);
4881 stl_sc26198wait(portp);
4882 stl_sc26198setreg(portp, MR0, mr0);
4883 clear_bit(ASYI_TXFLOWED, &portp->istate);
4884}
4885
4886/*****************************************************************************/
4887
4888/*
4889 * Interrupt service routine for sc26198 panels.
4890 */
4891
4892static void stl_sc26198intr(stlpanel_t *panelp, unsigned int iobase)
4893{
4894 stlport_t *portp;
4895 unsigned int iack;
4896
4897/*
4898 * Work around bug in sc26198 chip... Cannot have A6 address
4899 * line of UART high, else iack will be returned as 0.
4900 */
4901 outb(0, (iobase + 1));
4902
4903 iack = inb(iobase + XP_IACK);
4904 portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)];
4905
4906 if (iack & IVR_RXDATA)
4907 stl_sc26198rxisr(portp, iack);
4908 else if (iack & IVR_TXDATA)
4909 stl_sc26198txisr(portp);
4910 else
4911 stl_sc26198otherisr(portp, iack);
4912}
4913
4914/*****************************************************************************/
4915
4916/*
4917 * Transmit interrupt handler. This has gotta be fast! Handling TX
4918 * chars is pretty simple, stuff as many as possible from the TX buffer
4919 * into the sc26198 FIFO.
4920 * In practice it is possible that interrupts are enabled but that the
4921 * port has been hung up. Need to handle not having any TX buffer here,
4922 * this is done by using the side effect that head and tail will also
4923 * be NULL if the buffer has been freed.
4924 */
4925
4926static void stl_sc26198txisr(stlport_t *portp)
4927{
4928 unsigned int ioaddr;
4929 unsigned char mr0;
4930 int len, stlen;
4931 char *head, *tail;
4932
4933#ifdef DEBUG
4934 printk("stl_sc26198txisr(portp=%x)\n", (int) portp);
4935#endif
4936
4937 ioaddr = portp->ioaddr;
4938 head = portp->tx.head;
4939 tail = portp->tx.tail;
4940 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
4941 if ((len == 0) || ((len < STL_TXBUFLOW) &&
4942 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
4943 set_bit(ASYI_TXLOW, &portp->istate);
4944 schedule_work(&portp->tqueue);
4945 }
4946
4947 if (len == 0) {
4948 outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR));
4949 mr0 = inb(ioaddr + XP_DATA);
4950 if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) {
4951 portp->imr &= ~IR_TXRDY;
4952 outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR));
4953 outb(portp->imr, (ioaddr + XP_DATA));
4954 clear_bit(ASYI_TXBUSY, &portp->istate);
4955 } else {
4956 mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY);
4957 outb(mr0, (ioaddr + XP_DATA));
4958 }
4959 } else {
4960 len = MIN(len, SC26198_TXFIFOSIZE);
4961 portp->stats.txtotal += len;
4962 stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail));
4963 outb(GTXFIFO, (ioaddr + XP_ADDR));
4964 outsb((ioaddr + XP_DATA), tail, stlen);
4965 len -= stlen;
4966 tail += stlen;
4967 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
4968 tail = portp->tx.buf;
4969 if (len > 0) {
4970 outsb((ioaddr + XP_DATA), tail, len);
4971 tail += len;
4972 }
4973 portp->tx.tail = tail;
4974 }
4975}
4976
4977/*****************************************************************************/
4978
4979/*
4980 * Receive character interrupt handler. Determine if we have good chars
4981 * or bad chars and then process appropriately. Good chars are easy
4982 * just shove the lot into the RX buffer and set all status byte to 0.
4983 * If a bad RX char then process as required. This routine needs to be
4984 * fast! In practice it is possible that we get an interrupt on a port
4985 * that is closed. This can happen on hangups - since they completely
4986 * shutdown a port not in user context. Need to handle this case.
4987 */
4988
4989static void stl_sc26198rxisr(stlport_t *portp, unsigned int iack)
4990{
4991 struct tty_struct *tty;
4992 unsigned int len, buflen, ioaddr;
4993
4994#ifdef DEBUG
4995 printk("stl_sc26198rxisr(portp=%x,iack=%x)\n", (int) portp, iack);
4996#endif
4997
4998 tty = portp->tty;
4999 ioaddr = portp->ioaddr;
5000 outb(GIBCR, (ioaddr + XP_ADDR));
5001 len = inb(ioaddr + XP_DATA) + 1;
5002
5003 if ((iack & IVR_TYPEMASK) == IVR_RXDATA) {
33f0f88f 5004 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
1da177e4
LT		 5005 len = MIN(len, sizeof(stl_unwanted));
5006 outb(GRXFIFO, (ioaddr + XP_ADDR));
5007 insb((ioaddr + XP_DATA), &stl_unwanted[0], len);
5008 portp->stats.rxlost += len;
5009 portp->stats.rxtotal += len;
5010 } else {
5011 len = MIN(len, buflen);
5012 if (len > 0) {
33f0f88f 5013 unsigned char *ptr;
1da177e4 5014 outb(GRXFIFO, (ioaddr + XP_ADDR));
33f0f88f
AC		 5015 tty_prepare_flip_string(tty, &ptr, len);
5016 insb((ioaddr + XP_DATA), ptr, len);
1da177e4
LT		 5017 tty_schedule_flip(tty);
5018 portp->stats.rxtotal += len;
5019 }
5020 }
5021 } else {
5022 stl_sc26198rxbadchars(portp);
5023 }
5024
5025/*
5026 * If we are TX flow controlled and in IXANY mode then we may need
5027 * to unflow control here. We gotta do this because of the automatic
5028 * flow control modes of the sc26198.
5029 */
5030 if (test_bit(ASYI_TXFLOWED, &portp->istate)) {
5031 if ((tty != (struct tty_struct *) NULL) &&
5032 (tty->termios != (struct termios *) NULL) &&
5033 (tty->termios->c_iflag & IXANY)) {
5034 stl_sc26198txunflow(portp, tty);
5035 }
5036 }
5037}
5038
5039/*****************************************************************************/
5040
5041/*
5042 * Process an RX bad character.
5043 */
5044
5045static inline void stl_sc26198rxbadch(stlport_t *portp, unsigned char status, char ch)
5046{
5047 struct tty_struct *tty;
5048 unsigned int ioaddr;
5049
5050 tty = portp->tty;
5051 ioaddr = portp->ioaddr;
5052
5053 if (status & SR_RXPARITY)
5054 portp->stats.rxparity++;
5055 if (status & SR_RXFRAMING)
5056 portp->stats.rxframing++;
5057 if (status & SR_RXOVERRUN)
5058 portp->stats.rxoverrun++;
5059 if (status & SR_RXBREAK)
5060 portp->stats.rxbreaks++;
5061
5062 if ((tty != (struct tty_struct *) NULL) &&
5063 ((portp->rxignoremsk & status) == 0)) {
5064 if (portp->rxmarkmsk & status) {
5065 if (status & SR_RXBREAK) {
5066 status = TTY_BREAK;
5067 if (portp->flags & ASYNC_SAK) {
5068 do_SAK(tty);
5069 BRDENABLE(portp->brdnr, portp->pagenr);
5070 }
5071 } else if (status & SR_RXPARITY) {
5072 status = TTY_PARITY;
5073 } else if (status & SR_RXFRAMING) {
5074 status = TTY_FRAME;
5075 } else if(status & SR_RXOVERRUN) {
5076 status = TTY_OVERRUN;
5077 } else {
5078 status = 0;
5079 }
5080 } else {
5081 status = 0;
5082 }
5083
33f0f88f
AC		 5084 tty_insert_flip_char(tty, ch, status);
5085 tty_schedule_flip(tty);
1da177e4
LT		 5086
5087 if (status == 0)
5088 portp->stats.rxtotal++;
5089 }
5090}
5091
5092/*****************************************************************************/
5093
5094/*
5095 * Process all characters in the RX FIFO of the UART. Check all char
5096 * status bytes as well, and process as required. We need to check
5097 * all bytes in the FIFO, in case some more enter the FIFO while we
5098 * are here. To get the exact character error type we need to switch
5099 * into CHAR error mode (that is why we need to make sure we empty
5100 * the FIFO).
5101 */
5102
5103static void stl_sc26198rxbadchars(stlport_t *portp)
5104{
5105 unsigned char status, mr1;
5106 char ch;
5107
5108/*
5109 * To get the precise error type for each character we must switch
5110 * back into CHAR error mode.
5111 */
5112 mr1 = stl_sc26198getreg(portp, MR1);
5113 stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK));
5114
5115 while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) {
5116 stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR);
5117 ch = stl_sc26198getreg(portp, RXFIFO);
5118 stl_sc26198rxbadch(portp, status, ch);
5119 }
5120
5121/*
5122 * To get correct interrupt class we must switch back into BLOCK
5123 * error mode.
5124 */
5125 stl_sc26198setreg(portp, MR1, mr1);
5126}
5127
5128/*****************************************************************************/
5129
5130/*
5131 * Other interrupt handler. This includes modem signals, flow
5132 * control actions, etc. Most stuff is left to off-level interrupt
5133 * processing time.
5134 */
5135
5136static void stl_sc26198otherisr(stlport_t *portp, unsigned int iack)
5137{
5138 unsigned char cir, ipr, xisr;
5139
5140#ifdef DEBUG
5141 printk("stl_sc26198otherisr(portp=%x,iack=%x)\n", (int) portp, iack);
5142#endif
5143
5144 cir = stl_sc26198getglobreg(portp, CIR);
5145
5146 switch (cir & CIR_SUBTYPEMASK) {
5147 case CIR_SUBCOS:
5148 ipr = stl_sc26198getreg(portp, IPR);
5149 if (ipr & IPR_DCDCHANGE) {
5150 set_bit(ASYI_DCDCHANGE, &portp->istate);
5151 schedule_work(&portp->tqueue);
5152 portp->stats.modem++;
5153 }
5154 break;
5155 case CIR_SUBXONXOFF:
5156 xisr = stl_sc26198getreg(portp, XISR);
5157 if (xisr & XISR_RXXONGOT) {
5158 set_bit(ASYI_TXFLOWED, &portp->istate);
5159 portp->stats.txxoff++;
5160 }
5161 if (xisr & XISR_RXXOFFGOT) {
5162 clear_bit(ASYI_TXFLOWED, &portp->istate);
5163 portp->stats.txxon++;
5164 }
5165 break;
5166 case CIR_SUBBREAK:
5167 stl_sc26198setreg(portp, SCCR, CR_BREAKRESET);
5168 stl_sc26198rxbadchars(portp);
5169 break;
5170 default:
5171 break;
5172 }
5173}
5174
5175/*****************************************************************************/
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