]> git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blame - drivers/scsi/sym53c8xx_2/sym_nvram.c
projects / mirror_ubuntu-zesty-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[PATCH] turn many #if $undefined_string into #ifdef $undefined_string
[mirror_ubuntu-zesty-kernel.git] / drivers / scsi / sym53c8xx_2 / sym_nvram.c
CommitLineData
1da177e4
LT		 1/*
2 * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family
3 * of PCI-SCSI IO processors.
4 *
5 * Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr>
6 *
7 * This driver is derived from the Linux sym53c8xx driver.
8 * Copyright (C) 1998-2000 Gerard Roudier
9 *
10 * The sym53c8xx driver is derived from the ncr53c8xx driver that had been
11 * a port of the FreeBSD ncr driver to Linux-1.2.13.
12 *
13 * The original ncr driver has been written for 386bsd and FreeBSD by
14 * Wolfgang Stanglmeier <wolf@cologne.de>
15 * Stefan Esser <se@mi.Uni-Koeln.de>
16 * Copyright (C) 1994 Wolfgang Stanglmeier
17 *
18 * Other major contributions:
19 *
20 * NVRAM detection and reading.
21 * Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
22 *
23 *-----------------------------------------------------------------------------
24 *
25 * This program is free software; you can redistribute it and/or modify
26 * it under the terms of the GNU General Public License as published by
27 * the Free Software Foundation; either version 2 of the License, or
28 * (at your option) any later version.
29 *
30 * This program is distributed in the hope that it will be useful,
31 * but WITHOUT ANY WARRANTY; without even the implied warranty of
32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
33 * GNU General Public License for more details.
34 *
35 * You should have received a copy of the GNU General Public License
36 * along with this program; if not, write to the Free Software
37 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
38 */
39
40#include "sym_glue.h"
41#include "sym_nvram.h"
42
43#ifdef SYM_CONF_DEBUG_NVRAM
44static u_char Tekram_boot_delay[7] = {3, 5, 10, 20, 30, 60, 120};
45#endif
46
47/*
48 * Get host setup from NVRAM.
49 */
50void sym_nvram_setup_host(struct Scsi_Host *shost, struct sym_hcb *np, struct sym_nvram *nvram)
51{
52 /*
53 * Get parity checking, host ID, verbose mode
54 * and miscellaneous host flags from NVRAM.
55 */
56 switch (nvram->type) {
57 case SYM_SYMBIOS_NVRAM:
58 if (!(nvram->data.Symbios.flags & SYMBIOS_PARITY_ENABLE))
59 np->rv_scntl0 &= ~0x0a;
60 np->myaddr = nvram->data.Symbios.host_id & 0x0f;
61 if (nvram->data.Symbios.flags & SYMBIOS_VERBOSE_MSGS)
62 np->verbose += 1;
63 if (nvram->data.Symbios.flags1 & SYMBIOS_SCAN_HI_LO)
64 shost->reverse_ordering = 1;
65 if (nvram->data.Symbios.flags2 & SYMBIOS_AVOID_BUS_RESET)
66 np->usrflags |= SYM_AVOID_BUS_RESET;
67 break;
68 case SYM_TEKRAM_NVRAM:
69 np->myaddr = nvram->data.Tekram.host_id & 0x0f;
70 break;
71#ifdef CONFIG_PARISC
72 case SYM_PARISC_PDC:
73 if (nvram->data.parisc.host_id != -1)
74 np->myaddr = nvram->data.parisc.host_id;
75 if (nvram->data.parisc.factor != -1)
76 np->minsync = nvram->data.parisc.factor;
77 if (nvram->data.parisc.width != -1)
78 np->maxwide = nvram->data.parisc.width;
79 switch (nvram->data.parisc.mode) {
80 case 0: np->scsi_mode = SMODE_SE; break;
81 case 1: np->scsi_mode = SMODE_HVD; break;
82 case 2: np->scsi_mode = SMODE_LVD; break;
83 default: break;
84 }
85#endif
86 default:
87 break;
88 }
89}
90
91/*
92 * Get target set-up from Symbios format NVRAM.
93 */
94static void
95sym_Symbios_setup_target(struct sym_hcb *np, int target, Symbios_nvram *nvram)
96{
97 struct sym_tcb *tp = &np->target[target];
98 Symbios_target *tn = &nvram->target[target];
99
100 tp->usrtags =
101 (tn->flags & SYMBIOS_QUEUE_TAGS_ENABLED)? SYM_SETUP_MAX_TAG : 0;
102
103 if (!(tn->flags & SYMBIOS_DISCONNECT_ENABLE))
104 tp->usrflags &= ~SYM_DISC_ENABLED;
105 if (!(tn->flags & SYMBIOS_SCAN_AT_BOOT_TIME))
106 tp->usrflags |= SYM_SCAN_BOOT_DISABLED;
107 if (!(tn->flags & SYMBIOS_SCAN_LUNS))
108 tp->usrflags |= SYM_SCAN_LUNS_DISABLED;
109}
110
111/*
112 * Get target set-up from Tekram format NVRAM.
113 */
114static void
115sym_Tekram_setup_target(struct sym_hcb *np, int target, Tekram_nvram *nvram)
116{
117 struct sym_tcb *tp = &np->target[target];
118 struct Tekram_target *tn = &nvram->target[target];
119
120 if (tn->flags & TEKRAM_TAGGED_COMMANDS) {
121 tp->usrtags = 2 << nvram->max_tags_index;
122 }
123
124 if (tn->flags & TEKRAM_DISCONNECT_ENABLE)
125 tp->usrflags |= SYM_DISC_ENABLED;
126
127 /* If any device does not support parity, we will not use this option */
128 if (!(tn->flags & TEKRAM_PARITY_CHECK))
129 np->rv_scntl0 &= ~0x0a; /* SCSI parity checking disabled */
130}
131
132/*
133 * Get target setup from NVRAM.
134 */
135void sym_nvram_setup_target(struct sym_hcb *np, int target, struct sym_nvram *nvp)
136{
137 switch (nvp->type) {
138 case SYM_SYMBIOS_NVRAM:
139 sym_Symbios_setup_target(np, target, &nvp->data.Symbios);
140 break;
141 case SYM_TEKRAM_NVRAM:
142 sym_Tekram_setup_target(np, target, &nvp->data.Tekram);
143 break;
144 default:
145 break;
146 }
147}
148
149#ifdef SYM_CONF_DEBUG_NVRAM
150/*
151 * Dump Symbios format NVRAM for debugging purpose.
152 */
153static void sym_display_Symbios_nvram(struct sym_device *np, Symbios_nvram *nvram)
154{
155 int i;
156
157 /* display Symbios nvram host data */
158 printf("%s: HOST ID=%d%s%s%s%s%s%s\n",
159 sym_name(np), nvram->host_id & 0x0f,
160 (nvram->flags & SYMBIOS_SCAM_ENABLE) ? " SCAM" :"",
161 (nvram->flags & SYMBIOS_PARITY_ENABLE) ? " PARITY" :"",
162 (nvram->flags & SYMBIOS_VERBOSE_MSGS) ? " VERBOSE" :"",
163 (nvram->flags & SYMBIOS_CHS_MAPPING) ? " CHS_ALT" :"",
164 (nvram->flags2 & SYMBIOS_AVOID_BUS_RESET)?" NO_RESET" :"",
165 (nvram->flags1 & SYMBIOS_SCAN_HI_LO) ? " HI_LO" :"");
166
167 /* display Symbios nvram drive data */
168 for (i = 0 ; i < 15 ; i++) {
169 struct Symbios_target *tn = &nvram->target[i];
170 printf("%s-%d:%s%s%s%s WIDTH=%d SYNC=%d TMO=%d\n",
171 sym_name(np), i,
172 (tn->flags & SYMBIOS_DISCONNECT_ENABLE) ? " DISC" : "",
173 (tn->flags & SYMBIOS_SCAN_AT_BOOT_TIME) ? " SCAN_BOOT" : "",
174 (tn->flags & SYMBIOS_SCAN_LUNS) ? " SCAN_LUNS" : "",
175 (tn->flags & SYMBIOS_QUEUE_TAGS_ENABLED)? " TCQ" : "",
176 tn->bus_width,
177 tn->sync_period / 4,
178 tn->timeout);
179 }
180}
181
182/*
183 * Dump TEKRAM format NVRAM for debugging purpose.
184 */
185static void sym_display_Tekram_nvram(struct sym_device *np, Tekram_nvram *nvram)
186{
187 int i, tags, boot_delay;
188 char *rem;
189
190 /* display Tekram nvram host data */
191 tags = 2 << nvram->max_tags_index;
192 boot_delay = 0;
193 if (nvram->boot_delay_index < 6)
194 boot_delay = Tekram_boot_delay[nvram->boot_delay_index];
195 switch ((nvram->flags & TEKRAM_REMOVABLE_FLAGS) >> 6) {
196 default:
197 case 0: rem = ""; break;
198 case 1: rem = " REMOVABLE=boot device"; break;
199 case 2: rem = " REMOVABLE=all"; break;
200 }
201
202 printf("%s: HOST ID=%d%s%s%s%s%s%s%s%s%s BOOT DELAY=%d tags=%d\n",
203 sym_name(np), nvram->host_id & 0x0f,
204 (nvram->flags1 & SYMBIOS_SCAM_ENABLE) ? " SCAM" :"",
205 (nvram->flags & TEKRAM_MORE_THAN_2_DRIVES) ? " >2DRIVES":"",
206 (nvram->flags & TEKRAM_DRIVES_SUP_1GB) ? " >1GB" :"",
207 (nvram->flags & TEKRAM_RESET_ON_POWER_ON) ? " RESET" :"",
208 (nvram->flags & TEKRAM_ACTIVE_NEGATION) ? " ACT_NEG" :"",
209 (nvram->flags & TEKRAM_IMMEDIATE_SEEK) ? " IMM_SEEK" :"",
210 (nvram->flags & TEKRAM_SCAN_LUNS) ? " SCAN_LUNS" :"",
211 (nvram->flags1 & TEKRAM_F2_F6_ENABLED) ? " F2_F6" :"",
212 rem, boot_delay, tags);
213
214 /* display Tekram nvram drive data */
215 for (i = 0; i <= 15; i++) {
216 int sync, j;
217 struct Tekram_target *tn = &nvram->target[i];
218 j = tn->sync_index & 0xf;
219 sync = Tekram_sync[j];
220 printf("%s-%d:%s%s%s%s%s%s PERIOD=%d\n",
221 sym_name(np), i,
222 (tn->flags & TEKRAM_PARITY_CHECK) ? " PARITY" : "",
223 (tn->flags & TEKRAM_SYNC_NEGO) ? " SYNC" : "",
224 (tn->flags & TEKRAM_DISCONNECT_ENABLE) ? " DISC" : "",
225 (tn->flags & TEKRAM_START_CMD) ? " START" : "",
226 (tn->flags & TEKRAM_TAGGED_COMMANDS) ? " TCQ" : "",
227 (tn->flags & TEKRAM_WIDE_NEGO) ? " WIDE" : "",
228 sync);
229 }
230}
231#else
232static void sym_display_Symbios_nvram(struct sym_device *np, Symbios_nvram *nvram) { (void)np; (void)nvram; }
233static void sym_display_Tekram_nvram(struct sym_device *np, Tekram_nvram *nvram) { (void)np; (void)nvram; }
234#endif /* SYM_CONF_DEBUG_NVRAM */
235
236
237/*
238 * 24C16 EEPROM reading.
239 *
240 * GPOI0 - data in/data out
241 * GPIO1 - clock
242 * Symbios NVRAM wiring now also used by Tekram.
243 */
244
245#define SET_BIT 0
246#define CLR_BIT 1
247#define SET_CLK 2
248#define CLR_CLK 3
249
250/*
251 * Set/clear data/clock bit in GPIO0
252 */
253static void S24C16_set_bit(struct sym_device *np, u_char write_bit, u_char *gpreg,
254 int bit_mode)
255{
256 udelay(5);
257 switch (bit_mode) {
258 case SET_BIT:
259 *gpreg |= write_bit;
260 break;
261 case CLR_BIT:
262 *gpreg &= 0xfe;
263 break;
264 case SET_CLK:
265 *gpreg |= 0x02;
266 break;
267 case CLR_CLK:
268 *gpreg &= 0xfd;
269 break;
270
271 }
272 OUTB(np, nc_gpreg, *gpreg);
53222b90 273 INB(np, nc_mbox1);
1da177e4
LT		 274 udelay(5);
275}
276
277/*
278 * Send START condition to NVRAM to wake it up.
279 */
280static void S24C16_start(struct sym_device *np, u_char *gpreg)
281{
282 S24C16_set_bit(np, 1, gpreg, SET_BIT);
283 S24C16_set_bit(np, 0, gpreg, SET_CLK);
284 S24C16_set_bit(np, 0, gpreg, CLR_BIT);
285 S24C16_set_bit(np, 0, gpreg, CLR_CLK);
286}
287
288/*
289 * Send STOP condition to NVRAM - puts NVRAM to sleep... ZZzzzz!!
290 */
291static void S24C16_stop(struct sym_device *np, u_char *gpreg)
292{
293 S24C16_set_bit(np, 0, gpreg, SET_CLK);
294 S24C16_set_bit(np, 1, gpreg, SET_BIT);
295}
296
297/*
298 * Read or write a bit to the NVRAM,
299 * read if GPIO0 input else write if GPIO0 output
300 */
301static void S24C16_do_bit(struct sym_device *np, u_char *read_bit, u_char write_bit,
302 u_char *gpreg)
303{
304 S24C16_set_bit(np, write_bit, gpreg, SET_BIT);
305 S24C16_set_bit(np, 0, gpreg, SET_CLK);
306 if (read_bit)
307 *read_bit = INB(np, nc_gpreg);
308 S24C16_set_bit(np, 0, gpreg, CLR_CLK);
309 S24C16_set_bit(np, 0, gpreg, CLR_BIT);
310}
311
312/*
313 * Output an ACK to the NVRAM after reading,
314 * change GPIO0 to output and when done back to an input
315 */
316static void S24C16_write_ack(struct sym_device *np, u_char write_bit, u_char *gpreg,
317 u_char *gpcntl)
318{
319 OUTB(np, nc_gpcntl, *gpcntl & 0xfe);
320 S24C16_do_bit(np, NULL, write_bit, gpreg);
321 OUTB(np, nc_gpcntl, *gpcntl);
322}
323
324/*
325 * Input an ACK from NVRAM after writing,
326 * change GPIO0 to input and when done back to an output
327 */
328static void S24C16_read_ack(struct sym_device *np, u_char *read_bit, u_char *gpreg,
329 u_char *gpcntl)
330{
331 OUTB(np, nc_gpcntl, *gpcntl | 0x01);
332 S24C16_do_bit(np, read_bit, 1, gpreg);
333 OUTB(np, nc_gpcntl, *gpcntl);
334}
335
336/*
337 * WRITE a byte to the NVRAM and then get an ACK to see it was accepted OK,
338 * GPIO0 must already be set as an output
339 */
340static void S24C16_write_byte(struct sym_device *np, u_char *ack_data, u_char write_data,
341 u_char *gpreg, u_char *gpcntl)
342{
343 int x;
344
345 for (x = 0; x < 8; x++)
346 S24C16_do_bit(np, NULL, (write_data >> (7 - x)) & 0x01, gpreg);
347
348 S24C16_read_ack(np, ack_data, gpreg, gpcntl);
349}
350
351/*
352 * READ a byte from the NVRAM and then send an ACK to say we have got it,
353 * GPIO0 must already be set as an input
354 */
355static void S24C16_read_byte(struct sym_device *np, u_char *read_data, u_char ack_data,
356 u_char *gpreg, u_char *gpcntl)
357{
358 int x;
359 u_char read_bit;
360
361 *read_data = 0;
362 for (x = 0; x < 8; x++) {
363 S24C16_do_bit(np, &read_bit, 1, gpreg);
364 *read_data |= ((read_bit & 0x01) << (7 - x));
365 }
366
367 S24C16_write_ack(np, ack_data, gpreg, gpcntl);
368}
369
44456d37 370#ifdef SYM_CONF_NVRAM_WRITE_SUPPORT
1da177e4
LT		 371/*
372 * Write 'len' bytes starting at 'offset'.
373 */
374static int sym_write_S24C16_nvram(struct sym_device *np, int offset,
375 u_char *data, int len)
376{
377 u_char gpcntl, gpreg;
378 u_char old_gpcntl, old_gpreg;
379 u_char ack_data;
380 int x;
381
382 /* save current state of GPCNTL and GPREG */
383 old_gpreg = INB(np, nc_gpreg);
384 old_gpcntl = INB(np, nc_gpcntl);
385 gpcntl = old_gpcntl & 0x1c;
386
387 /* set up GPREG & GPCNTL to set GPIO0 and GPIO1 in to known state */
388 OUTB(np, nc_gpreg, old_gpreg);
389 OUTB(np, nc_gpcntl, gpcntl);
390
391 /* this is to set NVRAM into a known state with GPIO0/1 both low */
392 gpreg = old_gpreg;
393 S24C16_set_bit(np, 0, &gpreg, CLR_CLK);
394 S24C16_set_bit(np, 0, &gpreg, CLR_BIT);
395
396 /* now set NVRAM inactive with GPIO0/1 both high */
397 S24C16_stop(np, &gpreg);
398
399 /* NVRAM has to be written in segments of 16 bytes */
400 for (x = 0; x < len ; x += 16) {
401 do {
402 S24C16_start(np, &gpreg);
403 S24C16_write_byte(np, &ack_data,
404 0xa0 | (((offset+x) >> 7) & 0x0e),
405 &gpreg, &gpcntl);
406 } while (ack_data & 0x01);
407
408 S24C16_write_byte(np, &ack_data, (offset+x) & 0xff,
409 &gpreg, &gpcntl);
410
411 for (y = 0; y < 16; y++)
412 S24C16_write_byte(np, &ack_data, data[x+y],
413 &gpreg, &gpcntl);
414 S24C16_stop(np, &gpreg);
415 }
416
417 /* return GPIO0/1 to original states after having accessed NVRAM */
418 OUTB(np, nc_gpcntl, old_gpcntl);
419 OUTB(np, nc_gpreg, old_gpreg);
420
421 return 0;
422}
423#endif /* SYM_CONF_NVRAM_WRITE_SUPPORT */
424
425/*
426 * Read 'len' bytes starting at 'offset'.
427 */
428static int sym_read_S24C16_nvram(struct sym_device *np, int offset, u_char *data, int len)
429{
430 u_char gpcntl, gpreg;
431 u_char old_gpcntl, old_gpreg;
432 u_char ack_data;
433 int retv = 1;
434 int x;
435
436 /* save current state of GPCNTL and GPREG */
437 old_gpreg = INB(np, nc_gpreg);
438 old_gpcntl = INB(np, nc_gpcntl);
439 gpcntl = old_gpcntl & 0x1c;
440
441 /* set up GPREG & GPCNTL to set GPIO0 and GPIO1 in to known state */
442 OUTB(np, nc_gpreg, old_gpreg);
443 OUTB(np, nc_gpcntl, gpcntl);
444
445 /* this is to set NVRAM into a known state with GPIO0/1 both low */
446 gpreg = old_gpreg;
447 S24C16_set_bit(np, 0, &gpreg, CLR_CLK);
448 S24C16_set_bit(np, 0, &gpreg, CLR_BIT);
449
450 /* now set NVRAM inactive with GPIO0/1 both high */
451 S24C16_stop(np, &gpreg);
452
453 /* activate NVRAM */
454 S24C16_start(np, &gpreg);
455
456 /* write device code and random address MSB */
457 S24C16_write_byte(np, &ack_data,
458 0xa0 | ((offset >> 7) & 0x0e), &gpreg, &gpcntl);
459 if (ack_data & 0x01)
460 goto out;
461
462 /* write random address LSB */
463 S24C16_write_byte(np, &ack_data,
464 offset & 0xff, &gpreg, &gpcntl);
465 if (ack_data & 0x01)
466 goto out;
467
468 /* regenerate START state to set up for reading */
469 S24C16_start(np, &gpreg);
470
471 /* rewrite device code and address MSB with read bit set (lsb = 0x01) */
472 S24C16_write_byte(np, &ack_data,
473 0xa1 | ((offset >> 7) & 0x0e), &gpreg, &gpcntl);
474 if (ack_data & 0x01)
475 goto out;
476
477 /* now set up GPIO0 for inputting data */
478 gpcntl |= 0x01;
479 OUTB(np, nc_gpcntl, gpcntl);
480
481 /* input all requested data - only part of total NVRAM */
482 for (x = 0; x < len; x++)
483 S24C16_read_byte(np, &data[x], (x == (len-1)), &gpreg, &gpcntl);
484
485 /* finally put NVRAM back in inactive mode */
486 gpcntl &= 0xfe;
487 OUTB(np, nc_gpcntl, gpcntl);
488 S24C16_stop(np, &gpreg);
489 retv = 0;
490out:
491 /* return GPIO0/1 to original states after having accessed NVRAM */
492 OUTB(np, nc_gpcntl, old_gpcntl);
493 OUTB(np, nc_gpreg, old_gpreg);
494
495 return retv;
496}
497
498#undef SET_BIT
499#undef CLR_BIT
500#undef SET_CLK
501#undef CLR_CLK
502
503/*
504 * Try reading Symbios NVRAM.
505 * Return 0 if OK.
506 */
507static int sym_read_Symbios_nvram(struct sym_device *np, Symbios_nvram *nvram)
508{
509 static u_char Symbios_trailer[6] = {0xfe, 0xfe, 0, 0, 0, 0};
510 u_char *data = (u_char *) nvram;
511 int len = sizeof(*nvram);
512 u_short csum;
513 int x;
514
515 /* probe the 24c16 and read the SYMBIOS 24c16 area */
516 if (sym_read_S24C16_nvram (np, SYMBIOS_NVRAM_ADDRESS, data, len))
517 return 1;
518
519 /* check valid NVRAM signature, verify byte count and checksum */
520 if (nvram->type != 0 ||
521 memcmp(nvram->trailer, Symbios_trailer, 6) ||
522 nvram->byte_count != len - 12)
523 return 1;
524
525 /* verify checksum */
526 for (x = 6, csum = 0; x < len - 6; x++)
527 csum += data[x];
528 if (csum != nvram->checksum)
529 return 1;
530
531 return 0;
532}
533
534/*
535 * 93C46 EEPROM reading.
536 *
537 * GPOI0 - data in
538 * GPIO1 - data out
539 * GPIO2 - clock
540 * GPIO4 - chip select
541 *
542 * Used by Tekram.
543 */
544
545/*
546 * Pulse clock bit in GPIO0
547 */
548static void T93C46_Clk(struct sym_device *np, u_char *gpreg)
549{
550 OUTB(np, nc_gpreg, *gpreg | 0x04);
53222b90 551 INB(np, nc_mbox1);
1da177e4
LT		 552 udelay(2);
553 OUTB(np, nc_gpreg, *gpreg);
554}
555
556/*
557 * Read bit from NVRAM
558 */
559static void T93C46_Read_Bit(struct sym_device *np, u_char *read_bit, u_char *gpreg)
560{
561 udelay(2);
562 T93C46_Clk(np, gpreg);
563 *read_bit = INB(np, nc_gpreg);
564}
565
566/*
567 * Write bit to GPIO0
568 */
569static void T93C46_Write_Bit(struct sym_device *np, u_char write_bit, u_char *gpreg)
570{
571 if (write_bit & 0x01)
572 *gpreg |= 0x02;
573 else
574 *gpreg &= 0xfd;
575
576 *gpreg |= 0x10;
577
578 OUTB(np, nc_gpreg, *gpreg);
53222b90 579 INB(np, nc_mbox1);
1da177e4
LT		 580 udelay(2);
581
582 T93C46_Clk(np, gpreg);
583}
584
585/*
586 * Send STOP condition to NVRAM - puts NVRAM to sleep... ZZZzzz!!
587 */
588static void T93C46_Stop(struct sym_device *np, u_char *gpreg)
589{
590 *gpreg &= 0xef;
591 OUTB(np, nc_gpreg, *gpreg);
53222b90 592 INB(np, nc_mbox1);
1da177e4
LT		 593 udelay(2);
594
595 T93C46_Clk(np, gpreg);
596}
597
598/*
599 * Send read command and address to NVRAM
600 */
601static void T93C46_Send_Command(struct sym_device *np, u_short write_data,
602 u_char *read_bit, u_char *gpreg)
603{
604 int x;
605
606 /* send 9 bits, start bit (1), command (2), address (6) */
607 for (x = 0; x < 9; x++)
608 T93C46_Write_Bit(np, (u_char) (write_data >> (8 - x)), gpreg);
609
610 *read_bit = INB(np, nc_gpreg);
611}
612
613/*
614 * READ 2 bytes from the NVRAM
615 */
616static void T93C46_Read_Word(struct sym_device *np,
617 unsigned short *nvram_data, unsigned char *gpreg)
618{
619 int x;
620 u_char read_bit;
621
622 *nvram_data = 0;
623 for (x = 0; x < 16; x++) {
624 T93C46_Read_Bit(np, &read_bit, gpreg);
625
626 if (read_bit & 0x01)
627 *nvram_data |= (0x01 << (15 - x));
628 else
629 *nvram_data &= ~(0x01 << (15 - x));
630 }
631}
632
633/*
634 * Read Tekram NvRAM data.
635 */
636static int T93C46_Read_Data(struct sym_device *np, unsigned short *data,
637 int len, unsigned char *gpreg)
638{
639 int x;
640
641 for (x = 0; x < len; x++) {
642 unsigned char read_bit;
643 /* output read command and address */
644 T93C46_Send_Command(np, 0x180 | x, &read_bit, gpreg);
645 if (read_bit & 0x01)
646 return 1; /* Bad */
647 T93C46_Read_Word(np, &data[x], gpreg);
648 T93C46_Stop(np, gpreg);
649 }
650
651 return 0;
652}
653
654/*
655 * Try reading 93C46 Tekram NVRAM.
656 */
657static int sym_read_T93C46_nvram(struct sym_device *np, Tekram_nvram *nvram)
658{
659 u_char gpcntl, gpreg;
660 u_char old_gpcntl, old_gpreg;
661 int retv = 1;
662
663 /* save current state of GPCNTL and GPREG */
664 old_gpreg = INB(np, nc_gpreg);
665 old_gpcntl = INB(np, nc_gpcntl);
666
667 /* set up GPREG & GPCNTL to set GPIO0/1/2/4 in to known state, 0 in,
668 1/2/4 out */
669 gpreg = old_gpreg & 0xe9;
670 OUTB(np, nc_gpreg, gpreg);
671 gpcntl = (old_gpcntl & 0xe9) | 0x09;
672 OUTB(np, nc_gpcntl, gpcntl);
673
674 /* input all of NVRAM, 64 words */
675 retv = T93C46_Read_Data(np, (u_short *) nvram,
676 sizeof(*nvram) / sizeof(short), &gpreg);
677
678 /* return GPIO0/1/2/4 to original states after having accessed NVRAM */
679 OUTB(np, nc_gpcntl, old_gpcntl);
680 OUTB(np, nc_gpreg, old_gpreg);
681
682 return retv;
683}
684
685/*
686 * Try reading Tekram NVRAM.
687 * Return 0 if OK.
688 */
689static int sym_read_Tekram_nvram (struct sym_device *np, Tekram_nvram *nvram)
690{
691 u_char *data = (u_char *) nvram;
692 int len = sizeof(*nvram);
693 u_short csum;
694 int x;
695
696 switch (np->device_id) {
697 case PCI_DEVICE_ID_NCR_53C885:
698 case PCI_DEVICE_ID_NCR_53C895:
699 case PCI_DEVICE_ID_NCR_53C896:
700 x = sym_read_S24C16_nvram(np, TEKRAM_24C16_NVRAM_ADDRESS,
701 data, len);
702 break;
703 case PCI_DEVICE_ID_NCR_53C875:
704 x = sym_read_S24C16_nvram(np, TEKRAM_24C16_NVRAM_ADDRESS,
705 data, len);
706 if (!x)
707 break;
708 default:
709 x = sym_read_T93C46_nvram(np, nvram);
710 break;
711 }
712 if (x)
713 return 1;
714
715 /* verify checksum */
716 for (x = 0, csum = 0; x < len - 1; x += 2)
717 csum += data[x] + (data[x+1] << 8);
718 if (csum != 0x1234)
719 return 1;
720
721 return 0;
722}
723
724#ifdef CONFIG_PARISC
725/*
726 * Host firmware (PDC) keeps a table for altering SCSI capabilities.
727 * Many newer machines export one channel of 53c896 chip as SE, 50-pin HD.
728 * Also used for Multi-initiator SCSI clusters to set the SCSI Initiator ID.
729 */
730static int sym_read_parisc_pdc(struct sym_device *np, struct pdc_initiator *pdc)
731{
732 struct hardware_path hwpath;
733 get_pci_node_path(np->pdev, &hwpath);
734 if (!pdc_get_initiator(&hwpath, pdc))
735 return 0;
736
737 return SYM_PARISC_PDC;
738}
739#else
53222b90
MW		 740static inline int sym_read_parisc_pdc(struct sym_device *np,
741 struct pdc_initiator *x)
1da177e4
LT		 742{
743 return 0;
744}
745#endif
746
747/*
748 * Try reading Symbios or Tekram NVRAM
749 */
750int sym_read_nvram(struct sym_device *np, struct sym_nvram *nvp)
751{
752 if (!sym_read_Symbios_nvram(np, &nvp->data.Symbios)) {
753 nvp->type = SYM_SYMBIOS_NVRAM;
754 sym_display_Symbios_nvram(np, &nvp->data.Symbios);
755 } else if (!sym_read_Tekram_nvram(np, &nvp->data.Tekram)) {
756 nvp->type = SYM_TEKRAM_NVRAM;
757 sym_display_Tekram_nvram(np, &nvp->data.Tekram);
758 } else {
759 nvp->type = sym_read_parisc_pdc(np, &nvp->data.parisc);
760 }
761 return nvp->type;
762}
763
764char *sym_nvram_type(struct sym_nvram *nvp)
765{
766 switch (nvp->type) {
767 case SYM_SYMBIOS_NVRAM:
768 return "Symbios NVRAM";
769 case SYM_TEKRAM_NVRAM:
770 return "Tekram NVRAM";
771 case SYM_PARISC_PDC:
772 return "PA-RISC Firmware";
773 default:
774 return "No NVRAM";
775 }
776}
ubuntu-zesty-kernel mirror