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nilfs2: get rid of ns_free_segments_count
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / wan / lmc / lmc_media.c
blob5920c996fcdf24679944920fac6e577c0c4c472b
1 /* $Id: lmc_media.c,v 1.13 2000/04/11 05:25:26 asj Exp $ */
2
3 #include <linux/kernel.h>
4 #include <linux/string.h>
5 #include <linux/timer.h>
6 #include <linux/ptrace.h>
7 #include <linux/errno.h>
8 #include <linux/ioport.h>
9 #include <linux/interrupt.h>
10 #include <linux/in.h>
11 #include <linux/if_arp.h>
12 #include <linux/netdevice.h>
13 #include <linux/etherdevice.h>
14 #include <linux/skbuff.h>
15 #include <linux/inet.h>
16 #include <linux/bitops.h>
17
18 #include <asm/processor.h> /* Processor type for cache alignment. */
19 #include <asm/io.h>
20 #include <asm/dma.h>
21
22 #include <asm/uaccess.h>
23
24 #include "lmc.h"
25 #include "lmc_var.h"
26 #include "lmc_ioctl.h"
27 #include "lmc_debug.h"
28
29 #define CONFIG_LMC_IGNORE_HARDWARE_HANDSHAKE 1
30
31 /*
32 * Copyright (c) 1997-2000 LAN Media Corporation (LMC)
33 * All rights reserved. www.lanmedia.com
34 *
35 * This code is written by:
36 * Andrew Stanley-Jones (asj@cban.com)
37 * Rob Braun (bbraun@vix.com),
38 * Michael Graff (explorer@vix.com) and
39 * Matt Thomas (matt@3am-software.com).
40 *
41 * This software may be used and distributed according to the terms
42 * of the GNU General Public License version 2, incorporated herein by reference.
43 */
44
45 /*
46 * protocol independent method.
47 */
48 static void lmc_set_protocol (lmc_softc_t * const, lmc_ctl_t *);
49
50 /*
51 * media independent methods to check on media status, link, light LEDs,
52 * etc.
53 */
54 static void lmc_ds3_init (lmc_softc_t * const);
55 static void lmc_ds3_default (lmc_softc_t * const);
56 static void lmc_ds3_set_status (lmc_softc_t * const, lmc_ctl_t *);
57 static void lmc_ds3_set_100ft (lmc_softc_t * const, int);
58 static int lmc_ds3_get_link_status (lmc_softc_t * const);
59 static void lmc_ds3_set_crc_length (lmc_softc_t * const, int);
60 static void lmc_ds3_set_scram (lmc_softc_t * const, int);
61 static void lmc_ds3_watchdog (lmc_softc_t * const);
62
63 static void lmc_hssi_init (lmc_softc_t * const);
64 static void lmc_hssi_default (lmc_softc_t * const);
65 static void lmc_hssi_set_status (lmc_softc_t * const, lmc_ctl_t *);
66 static void lmc_hssi_set_clock (lmc_softc_t * const, int);
67 static int lmc_hssi_get_link_status (lmc_softc_t * const);
68 static void lmc_hssi_set_link_status (lmc_softc_t * const, int);
69 static void lmc_hssi_set_crc_length (lmc_softc_t * const, int);
70 static void lmc_hssi_watchdog (lmc_softc_t * const);
71
72 static void lmc_ssi_init (lmc_softc_t * const);
73 static void lmc_ssi_default (lmc_softc_t * const);
74 static void lmc_ssi_set_status (lmc_softc_t * const, lmc_ctl_t *);
75 static void lmc_ssi_set_clock (lmc_softc_t * const, int);
76 static void lmc_ssi_set_speed (lmc_softc_t * const, lmc_ctl_t *);
77 static int lmc_ssi_get_link_status (lmc_softc_t * const);
78 static void lmc_ssi_set_link_status (lmc_softc_t * const, int);
79 static void lmc_ssi_set_crc_length (lmc_softc_t * const, int);
80 static void lmc_ssi_watchdog (lmc_softc_t * const);
81
82 static void lmc_t1_init (lmc_softc_t * const);
83 static void lmc_t1_default (lmc_softc_t * const);
84 static void lmc_t1_set_status (lmc_softc_t * const, lmc_ctl_t *);
85 static int lmc_t1_get_link_status (lmc_softc_t * const);
86 static void lmc_t1_set_circuit_type (lmc_softc_t * const, int);
87 static void lmc_t1_set_crc_length (lmc_softc_t * const, int);
88 static void lmc_t1_set_clock (lmc_softc_t * const, int);
89 static void lmc_t1_watchdog (lmc_softc_t * const);
90
91 static void lmc_dummy_set_1 (lmc_softc_t * const, int);
92 static void lmc_dummy_set2_1 (lmc_softc_t * const, lmc_ctl_t *);
93
94 static inline void write_av9110_bit (lmc_softc_t *, int);
95 static void write_av9110(lmc_softc_t *, u32, u32, u32, u32, u32);
96
97 lmc_media_t lmc_ds3_media = {
98 lmc_ds3_init, /* special media init stuff */
99 lmc_ds3_default, /* reset to default state */
100 lmc_ds3_set_status, /* reset status to state provided */
101 lmc_dummy_set_1, /* set clock source */
102 lmc_dummy_set2_1, /* set line speed */
103 lmc_ds3_set_100ft, /* set cable length */
104 lmc_ds3_set_scram, /* set scrambler */
105 lmc_ds3_get_link_status, /* get link status */
106 lmc_dummy_set_1, /* set link status */
107 lmc_ds3_set_crc_length, /* set CRC length */
108 lmc_dummy_set_1, /* set T1 or E1 circuit type */
109 lmc_ds3_watchdog
110 };
111
112 lmc_media_t lmc_hssi_media = {
113 lmc_hssi_init, /* special media init stuff */
114 lmc_hssi_default, /* reset to default state */
115 lmc_hssi_set_status, /* reset status to state provided */
116 lmc_hssi_set_clock, /* set clock source */
117 lmc_dummy_set2_1, /* set line speed */
118 lmc_dummy_set_1, /* set cable length */
119 lmc_dummy_set_1, /* set scrambler */
120 lmc_hssi_get_link_status, /* get link status */
121 lmc_hssi_set_link_status, /* set link status */
122 lmc_hssi_set_crc_length, /* set CRC length */
123 lmc_dummy_set_1, /* set T1 or E1 circuit type */
124 lmc_hssi_watchdog
125 };
126
127 lmc_media_t lmc_ssi_media = { lmc_ssi_init, /* special media init stuff */
128 lmc_ssi_default, /* reset to default state */
129 lmc_ssi_set_status, /* reset status to state provided */
130 lmc_ssi_set_clock, /* set clock source */
131 lmc_ssi_set_speed, /* set line speed */
132 lmc_dummy_set_1, /* set cable length */
133 lmc_dummy_set_1, /* set scrambler */
134 lmc_ssi_get_link_status, /* get link status */
135 lmc_ssi_set_link_status, /* set link status */
136 lmc_ssi_set_crc_length, /* set CRC length */
137 lmc_dummy_set_1, /* set T1 or E1 circuit type */
138 lmc_ssi_watchdog
139 };
140
141 lmc_media_t lmc_t1_media = {
142 lmc_t1_init, /* special media init stuff */
143 lmc_t1_default, /* reset to default state */
144 lmc_t1_set_status, /* reset status to state provided */
145 lmc_t1_set_clock, /* set clock source */
146 lmc_dummy_set2_1, /* set line speed */
147 lmc_dummy_set_1, /* set cable length */
148 lmc_dummy_set_1, /* set scrambler */
149 lmc_t1_get_link_status, /* get link status */
150 lmc_dummy_set_1, /* set link status */
151 lmc_t1_set_crc_length, /* set CRC length */
152 lmc_t1_set_circuit_type, /* set T1 or E1 circuit type */
153 lmc_t1_watchdog
154 };
155
156 static void
157 lmc_dummy_set_1 (lmc_softc_t * const sc, int a)
158 {
159 }
160
161 static void
162 lmc_dummy_set2_1 (lmc_softc_t * const sc, lmc_ctl_t * a)
163 {
164 }
165
166 /*
167 * HSSI methods
168 */
169
170 static void
171 lmc_hssi_init (lmc_softc_t * const sc)
172 {
173 sc->ictl.cardtype = LMC_CTL_CARDTYPE_LMC5200;
174
175 lmc_gpio_mkoutput (sc, LMC_GEP_HSSI_CLOCK);
176 }
177
178 static void
179 lmc_hssi_default (lmc_softc_t * const sc)
180 {
181 sc->lmc_miireg16 = LMC_MII16_LED_ALL;
182
183 sc->lmc_media->set_link_status (sc, LMC_LINK_DOWN);
184 sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_EXT);
185 sc->lmc_media->set_crc_length (sc, LMC_CTL_CRC_LENGTH_16);
186 }
187
188 /*
189 * Given a user provided state, set ourselves up to match it. This will
190 * always reset the card if needed.
191 */
192 static void
193 lmc_hssi_set_status (lmc_softc_t * const sc, lmc_ctl_t * ctl)
194 {
195 if (ctl == NULL)
196 {
197 sc->lmc_media->set_clock_source (sc, sc->ictl.clock_source);
198 lmc_set_protocol (sc, NULL);
199
200 return;
201 }
202
203 /*
204 * check for change in clock source
205 */
206 if (ctl->clock_source && !sc->ictl.clock_source)
207 {
208 sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_INT);
209 sc->lmc_timing = LMC_CTL_CLOCK_SOURCE_INT;
210 }
211 else if (!ctl->clock_source && sc->ictl.clock_source)
212 {
213 sc->lmc_timing = LMC_CTL_CLOCK_SOURCE_EXT;
214 sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_EXT);
215 }
216
217 lmc_set_protocol (sc, ctl);
218 }
219
220 /*
221 * 1 == internal, 0 == external
222 */
223 static void
224 lmc_hssi_set_clock (lmc_softc_t * const sc, int ie)
225 {
226 int old;
227 old = sc->ictl.clock_source;
228 if (ie == LMC_CTL_CLOCK_SOURCE_EXT)
229 {
230 sc->lmc_gpio |= LMC_GEP_HSSI_CLOCK;
231 LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
232 sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_EXT;
233 if(old != ie)
234 printk (LMC_PRINTF_FMT ": clock external\n", LMC_PRINTF_ARGS);
235 }
236 else
237 {
238 sc->lmc_gpio &= ~(LMC_GEP_HSSI_CLOCK);
239 LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
240 sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_INT;
241 if(old != ie)
242 printk (LMC_PRINTF_FMT ": clock internal\n", LMC_PRINTF_ARGS);
243 }
244 }
245
246 /*
247 * return hardware link status.
248 * 0 == link is down, 1 == link is up.
249 */
250 static int
251 lmc_hssi_get_link_status (lmc_softc_t * const sc)
252 {
253 /*
254 * We're using the same code as SSI since
255 * they're practically the same
256 */
257 return lmc_ssi_get_link_status(sc);
258 }
259
260 static void
261 lmc_hssi_set_link_status (lmc_softc_t * const sc, int state)
262 {
263 if (state == LMC_LINK_UP)
264 sc->lmc_miireg16 |= LMC_MII16_HSSI_TA;
265 else
266 sc->lmc_miireg16 &= ~LMC_MII16_HSSI_TA;
267
268 lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
269 }
270
271 /*
272 * 0 == 16bit, 1 == 32bit
273 */
274 static void
275 lmc_hssi_set_crc_length (lmc_softc_t * const sc, int state)
276 {
277 if (state == LMC_CTL_CRC_LENGTH_32)
278 {
279 /* 32 bit */
280 sc->lmc_miireg16 |= LMC_MII16_HSSI_CRC;
281 sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_32;
282 }
283 else
284 {
285 /* 16 bit */
286 sc->lmc_miireg16 &= ~LMC_MII16_HSSI_CRC;
287 sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_16;
288 }
289
290 lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
291 }
292
293 static void
294 lmc_hssi_watchdog (lmc_softc_t * const sc)
295 {
296 /* HSSI is blank */
297 }
298
299 /*
300 * DS3 methods
301 */
302
303 /*
304 * Set cable length
305 */
306 static void
307 lmc_ds3_set_100ft (lmc_softc_t * const sc, int ie)
308 {
309 if (ie == LMC_CTL_CABLE_LENGTH_GT_100FT)
310 {
311 sc->lmc_miireg16 &= ~LMC_MII16_DS3_ZERO;
312 sc->ictl.cable_length = LMC_CTL_CABLE_LENGTH_GT_100FT;
313 }
314 else if (ie == LMC_CTL_CABLE_LENGTH_LT_100FT)
315 {
316 sc->lmc_miireg16 |= LMC_MII16_DS3_ZERO;
317 sc->ictl.cable_length = LMC_CTL_CABLE_LENGTH_LT_100FT;
318 }
319 lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
320 }
321
322 static void
323 lmc_ds3_default (lmc_softc_t * const sc)
324 {
325 sc->lmc_miireg16 = LMC_MII16_LED_ALL;
326
327 sc->lmc_media->set_link_status (sc, LMC_LINK_DOWN);
328 sc->lmc_media->set_cable_length (sc, LMC_CTL_CABLE_LENGTH_LT_100FT);
329 sc->lmc_media->set_scrambler (sc, LMC_CTL_OFF);
330 sc->lmc_media->set_crc_length (sc, LMC_CTL_CRC_LENGTH_16);
331 }
332
333 /*
334 * Given a user provided state, set ourselves up to match it. This will
335 * always reset the card if needed.
336 */
337 static void
338 lmc_ds3_set_status (lmc_softc_t * const sc, lmc_ctl_t * ctl)
339 {
340 if (ctl == NULL)
341 {
342 sc->lmc_media->set_cable_length (sc, sc->ictl.cable_length);
343 sc->lmc_media->set_scrambler (sc, sc->ictl.scrambler_onoff);
344 lmc_set_protocol (sc, NULL);
345
346 return;
347 }
348
349 /*
350 * check for change in cable length setting
351 */
352 if (ctl->cable_length && !sc->ictl.cable_length)
353 lmc_ds3_set_100ft (sc, LMC_CTL_CABLE_LENGTH_GT_100FT);
354 else if (!ctl->cable_length && sc->ictl.cable_length)
355 lmc_ds3_set_100ft (sc, LMC_CTL_CABLE_LENGTH_LT_100FT);
356
357 /*
358 * Check for change in scrambler setting (requires reset)
359 */
360 if (ctl->scrambler_onoff && !sc->ictl.scrambler_onoff)
361 lmc_ds3_set_scram (sc, LMC_CTL_ON);
362 else if (!ctl->scrambler_onoff && sc->ictl.scrambler_onoff)
363 lmc_ds3_set_scram (sc, LMC_CTL_OFF);
364
365 lmc_set_protocol (sc, ctl);
366 }
367
368 static void
369 lmc_ds3_init (lmc_softc_t * const sc)
370 {
371 int i;
372
373 sc->ictl.cardtype = LMC_CTL_CARDTYPE_LMC5245;
374
375 /* writes zeros everywhere */
376 for (i = 0; i < 21; i++)
377 {
378 lmc_mii_writereg (sc, 0, 17, i);
379 lmc_mii_writereg (sc, 0, 18, 0);
380 }
381
382 /* set some essential bits */
383 lmc_mii_writereg (sc, 0, 17, 1);
384 lmc_mii_writereg (sc, 0, 18, 0x25); /* ser, xtx */
385
386 lmc_mii_writereg (sc, 0, 17, 5);
387 lmc_mii_writereg (sc, 0, 18, 0x80); /* emode */
388
389 lmc_mii_writereg (sc, 0, 17, 14);
390 lmc_mii_writereg (sc, 0, 18, 0x30); /* rcgen, tcgen */
391
392 /* clear counters and latched bits */
393 for (i = 0; i < 21; i++)
394 {
395 lmc_mii_writereg (sc, 0, 17, i);
396 lmc_mii_readreg (sc, 0, 18);
397 }
398 }
399
400 /*
401 * 1 == DS3 payload scrambled, 0 == not scrambled
402 */
403 static void
404 lmc_ds3_set_scram (lmc_softc_t * const sc, int ie)
405 {
406 if (ie == LMC_CTL_ON)
407 {
408 sc->lmc_miireg16 |= LMC_MII16_DS3_SCRAM;
409 sc->ictl.scrambler_onoff = LMC_CTL_ON;
410 }
411 else
412 {
413 sc->lmc_miireg16 &= ~LMC_MII16_DS3_SCRAM;
414 sc->ictl.scrambler_onoff = LMC_CTL_OFF;
415 }
416 lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
417 }
418
419 /*
420 * return hardware link status.
421 * 0 == link is down, 1 == link is up.
422 */
423 static int
424 lmc_ds3_get_link_status (lmc_softc_t * const sc)
425 {
426 u16 link_status, link_status_11;
427 int ret = 1;
428
429 lmc_mii_writereg (sc, 0, 17, 7);
430 link_status = lmc_mii_readreg (sc, 0, 18);
431
432 /* LMC5245 (DS3) & LMC1200 (DS1) LED definitions
433 * led0 yellow = far-end adapter is in Red alarm condition
434 * led1 blue = received an Alarm Indication signal
435 * (upstream failure)
436 * led2 Green = power to adapter, Gate Array loaded & driver
437 * attached
438 * led3 red = Loss of Signal (LOS) or out of frame (OOF)
439 * conditions detected on T3 receive signal
440 */
441
442 lmc_led_on(sc, LMC_DS3_LED2);
443
444 if ((link_status & LMC_FRAMER_REG0_DLOS) ||
445 (link_status & LMC_FRAMER_REG0_OOFS)){
446 ret = 0;
447 if(sc->last_led_err[3] != 1){
448 u16 r1;
449 lmc_mii_writereg (sc, 0, 17, 01); /* Turn on Xbit error as our cisco does */
450 r1 = lmc_mii_readreg (sc, 0, 18);
451 r1 &= 0xfe;
452 lmc_mii_writereg(sc, 0, 18, r1);
453 printk(KERN_WARNING "%s: Red Alarm - Loss of Signal or Loss of Framing\n", sc->name);
454 }
455 lmc_led_on(sc, LMC_DS3_LED3); /* turn on red LED */
456 sc->last_led_err[3] = 1;
457 }
458 else {
459 lmc_led_off(sc, LMC_DS3_LED3); /* turn on red LED */
460 if(sc->last_led_err[3] == 1){
461 u16 r1;
462 lmc_mii_writereg (sc, 0, 17, 01); /* Turn off Xbit error */
463 r1 = lmc_mii_readreg (sc, 0, 18);
464 r1 |= 0x01;
465 lmc_mii_writereg(sc, 0, 18, r1);
466 }
467 sc->last_led_err[3] = 0;
468 }
469
470 lmc_mii_writereg(sc, 0, 17, 0x10);
471 link_status_11 = lmc_mii_readreg(sc, 0, 18);
472 if((link_status & LMC_FRAMER_REG0_AIS) ||
473 (link_status_11 & LMC_FRAMER_REG10_XBIT)) {
474 ret = 0;
475 if(sc->last_led_err[0] != 1){
476 printk(KERN_WARNING "%s: AIS Alarm or XBit Error\n", sc->name);
477 printk(KERN_WARNING "%s: Remote end has loss of signal or framing\n", sc->name);
478 }
479 lmc_led_on(sc, LMC_DS3_LED0);
480 sc->last_led_err[0] = 1;
481 }
482 else {
483 lmc_led_off(sc, LMC_DS3_LED0);
484 sc->last_led_err[0] = 0;
485 }
486
487 lmc_mii_writereg (sc, 0, 17, 9);
488 link_status = lmc_mii_readreg (sc, 0, 18);
489
490 if(link_status & LMC_FRAMER_REG9_RBLUE){
491 ret = 0;
492 if(sc->last_led_err[1] != 1){
493 printk(KERN_WARNING "%s: Blue Alarm - Receiving all 1's\n", sc->name);
494 }
495 lmc_led_on(sc, LMC_DS3_LED1);
496 sc->last_led_err[1] = 1;
497 }
498 else {
499 lmc_led_off(sc, LMC_DS3_LED1);
500 sc->last_led_err[1] = 0;
501 }
502
503 return ret;
504 }
505
506 /*
507 * 0 == 16bit, 1 == 32bit
508 */
509 static void
510 lmc_ds3_set_crc_length (lmc_softc_t * const sc, int state)
511 {
512 if (state == LMC_CTL_CRC_LENGTH_32)
513 {
514 /* 32 bit */
515 sc->lmc_miireg16 |= LMC_MII16_DS3_CRC;
516 sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_32;
517 }
518 else
519 {
520 /* 16 bit */
521 sc->lmc_miireg16 &= ~LMC_MII16_DS3_CRC;
522 sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_16;
523 }
524
525 lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
526 }
527
528 static void
529 lmc_ds3_watchdog (lmc_softc_t * const sc)
530 {
531
532 }
533
534
535 /*
536 * SSI methods
537 */
538
539 static void lmc_ssi_init(lmc_softc_t * const sc)
540 {
541 u16 mii17;
542 int cable;
543
544 sc->ictl.cardtype = LMC_CTL_CARDTYPE_LMC1000;
545
546 mii17 = lmc_mii_readreg(sc, 0, 17);
547
548 cable = (mii17 & LMC_MII17_SSI_CABLE_MASK) >> LMC_MII17_SSI_CABLE_SHIFT;
549 sc->ictl.cable_type = cable;
550
551 lmc_gpio_mkoutput(sc, LMC_GEP_SSI_TXCLOCK);
552 }
553
554 static void
555 lmc_ssi_default (lmc_softc_t * const sc)
556 {
557 sc->lmc_miireg16 = LMC_MII16_LED_ALL;
558
559 /*
560 * make TXCLOCK always be an output
561 */
562 lmc_gpio_mkoutput (sc, LMC_GEP_SSI_TXCLOCK);
563
564 sc->lmc_media->set_link_status (sc, LMC_LINK_DOWN);
565 sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_EXT);
566 sc->lmc_media->set_speed (sc, NULL);
567 sc->lmc_media->set_crc_length (sc, LMC_CTL_CRC_LENGTH_16);
568 }
569
570 /*
571 * Given a user provided state, set ourselves up to match it. This will
572 * always reset the card if needed.
573 */
574 static void
575 lmc_ssi_set_status (lmc_softc_t * const sc, lmc_ctl_t * ctl)
576 {
577 if (ctl == NULL)
578 {
579 sc->lmc_media->set_clock_source (sc, sc->ictl.clock_source);
580 sc->lmc_media->set_speed (sc, &sc->ictl);
581 lmc_set_protocol (sc, NULL);
582
583 return;
584 }
585
586 /*
587 * check for change in clock source
588 */
589 if (ctl->clock_source == LMC_CTL_CLOCK_SOURCE_INT
590 && sc->ictl.clock_source == LMC_CTL_CLOCK_SOURCE_EXT)
591 {
592 sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_INT);
593 sc->lmc_timing = LMC_CTL_CLOCK_SOURCE_INT;
594 }
595 else if (ctl->clock_source == LMC_CTL_CLOCK_SOURCE_EXT
596 && sc->ictl.clock_source == LMC_CTL_CLOCK_SOURCE_INT)
597 {
598 sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_EXT);
599 sc->lmc_timing = LMC_CTL_CLOCK_SOURCE_EXT;
600 }
601
602 if (ctl->clock_rate != sc->ictl.clock_rate)
603 sc->lmc_media->set_speed (sc, ctl);
604
605 lmc_set_protocol (sc, ctl);
606 }
607
608 /*
609 * 1 == internal, 0 == external
610 */
611 static void
612 lmc_ssi_set_clock (lmc_softc_t * const sc, int ie)
613 {
614 int old;
615 old = ie;
616 if (ie == LMC_CTL_CLOCK_SOURCE_EXT)
617 {
618 sc->lmc_gpio &= ~(LMC_GEP_SSI_TXCLOCK);
619 LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
620 sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_EXT;
621 if(ie != old)
622 printk (LMC_PRINTF_FMT ": clock external\n", LMC_PRINTF_ARGS);
623 }
624 else
625 {
626 sc->lmc_gpio |= LMC_GEP_SSI_TXCLOCK;
627 LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
628 sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_INT;
629 if(ie != old)
630 printk (LMC_PRINTF_FMT ": clock internal\n", LMC_PRINTF_ARGS);
631 }
632 }
633
634 static void
635 lmc_ssi_set_speed (lmc_softc_t * const sc, lmc_ctl_t * ctl)
636 {
637 lmc_ctl_t *ictl = &sc->ictl;
638 lmc_av9110_t *av;
639
640 /* original settings for clock rate of:
641 * 100 Khz (8,25,0,0,2) were incorrect
642 * they should have been 80,125,1,3,3
643 * There are 17 param combinations to produce this freq.
644 * For 1.5 Mhz use 120,100,1,1,2 (226 param. combinations)
645 */
646 if (ctl == NULL)
647 {
648 av = &ictl->cardspec.ssi;
649 ictl->clock_rate = 1500000;
650 av->f = ictl->clock_rate;
651 av->n = 120;
652 av->m = 100;
653 av->v = 1;
654 av->x = 1;
655 av->r = 2;
656
657 write_av9110 (sc, av->n, av->m, av->v, av->x, av->r);
658 return;
659 }
660
661 av = &ctl->cardspec.ssi;
662
663 if (av->f == 0)
664 return;
665
666 ictl->clock_rate = av->f; /* really, this is the rate we are */
667 ictl->cardspec.ssi = *av;
668
669 write_av9110 (sc, av->n, av->m, av->v, av->x, av->r);
670 }
671
672 /*
673 * return hardware link status.
674 * 0 == link is down, 1 == link is up.
675 */
676 static int
677 lmc_ssi_get_link_status (lmc_softc_t * const sc)
678 {
679 u16 link_status;
680 u32 ticks;
681 int ret = 1;
682 int hw_hdsk = 1;
683
684 /*
685 * missing CTS? Hmm. If we require CTS on, we may never get the
686 * link to come up, so omit it in this test.
687 *
688 * Also, it seems that with a loopback cable, DCD isn't asserted,
689 * so just check for things like this:
690 * DSR _must_ be asserted.
691 * One of DCD or CTS must be asserted.
692 */
693
694 /* LMC 1000 (SSI) LED definitions
695 * led0 Green = power to adapter, Gate Array loaded &
696 * driver attached
697 * led1 Green = DSR and DTR and RTS and CTS are set
698 * led2 Green = Cable detected
699 * led3 red = No timing is available from the
700 * cable or the on-board frequency
701 * generator.
702 */
703
704 link_status = lmc_mii_readreg (sc, 0, 16);
705
706 /* Is the transmit clock still available */
707 ticks = LMC_CSR_READ (sc, csr_gp_timer);
708 ticks = 0x0000ffff - (ticks & 0x0000ffff);
709
710 lmc_led_on (sc, LMC_MII16_LED0);
711
712 /* ====== transmit clock determination ===== */
713 if (sc->lmc_timing == LMC_CTL_CLOCK_SOURCE_INT) {
714 lmc_led_off(sc, LMC_MII16_LED3);
715 }
716 else if (ticks == 0 ) { /* no clock found ? */
717 ret = 0;
718 if (sc->last_led_err[3] != 1) {
719 sc->extra_stats.tx_lossOfClockCnt++;
720 printk(KERN_WARNING "%s: Lost Clock, Link Down\n", sc->name);
721 }
722 sc->last_led_err[3] = 1;
723 lmc_led_on (sc, LMC_MII16_LED3); /* turn ON red LED */
724 }
725 else {
726 if(sc->last_led_err[3] == 1)
727 printk(KERN_WARNING "%s: Clock Returned\n", sc->name);
728 sc->last_led_err[3] = 0;
729 lmc_led_off (sc, LMC_MII16_LED3); /* turn OFF red LED */
730 }
731
732 if ((link_status & LMC_MII16_SSI_DSR) == 0) { /* Also HSSI CA */
733 ret = 0;
734 hw_hdsk = 0;
735 }
736
737 #ifdef CONFIG_LMC_IGNORE_HARDWARE_HANDSHAKE
738 if ((link_status & (LMC_MII16_SSI_CTS | LMC_MII16_SSI_DCD)) == 0){
739 ret = 0;
740 hw_hdsk = 0;
741 }
742 #endif
743
744 if(hw_hdsk == 0){
745 if(sc->last_led_err[1] != 1)
746 printk(KERN_WARNING "%s: DSR not asserted\n", sc->name);
747 sc->last_led_err[1] = 1;
748 lmc_led_off(sc, LMC_MII16_LED1);
749 }
750 else {
751 if(sc->last_led_err[1] != 0)
752 printk(KERN_WARNING "%s: DSR now asserted\n", sc->name);
753 sc->last_led_err[1] = 0;
754 lmc_led_on(sc, LMC_MII16_LED1);
755 }
756
757 if(ret == 1) {
758 lmc_led_on(sc, LMC_MII16_LED2); /* Over all good status? */
759 }
760
761 return ret;
762 }
763
764 static void
765 lmc_ssi_set_link_status (lmc_softc_t * const sc, int state)
766 {
767 if (state == LMC_LINK_UP)
768 {
769 sc->lmc_miireg16 |= (LMC_MII16_SSI_DTR | LMC_MII16_SSI_RTS);
770 printk (LMC_PRINTF_FMT ": asserting DTR and RTS\n", LMC_PRINTF_ARGS);
771 }
772 else
773 {
774 sc->lmc_miireg16 &= ~(LMC_MII16_SSI_DTR | LMC_MII16_SSI_RTS);
775 printk (LMC_PRINTF_FMT ": deasserting DTR and RTS\n", LMC_PRINTF_ARGS);
776 }
777
778 lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
779
780 }
781
782 /*
783 * 0 == 16bit, 1 == 32bit
784 */
785 static void
786 lmc_ssi_set_crc_length (lmc_softc_t * const sc, int state)
787 {
788 if (state == LMC_CTL_CRC_LENGTH_32)
789 {
790 /* 32 bit */
791 sc->lmc_miireg16 |= LMC_MII16_SSI_CRC;
792 sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_32;
793 sc->lmc_crcSize = LMC_CTL_CRC_BYTESIZE_4;
794
795 }
796 else
797 {
798 /* 16 bit */
799 sc->lmc_miireg16 &= ~LMC_MII16_SSI_CRC;
800 sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_16;
801 sc->lmc_crcSize = LMC_CTL_CRC_BYTESIZE_2;
802 }
803
804 lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
805 }
806
807 /*
808 * These are bits to program the ssi frequency generator
809 */
810 static inline void
811 write_av9110_bit (lmc_softc_t * sc, int c)
812 {
813 /*
814 * set the data bit as we need it.
815 */
816 sc->lmc_gpio &= ~(LMC_GEP_CLK);
817 if (c & 0x01)
818 sc->lmc_gpio |= LMC_GEP_DATA;
819 else
820 sc->lmc_gpio &= ~(LMC_GEP_DATA);
821 LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
822
823 /*
824 * set the clock to high
825 */
826 sc->lmc_gpio |= LMC_GEP_CLK;
827 LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
828
829 /*
830 * set the clock to low again.
831 */
832 sc->lmc_gpio &= ~(LMC_GEP_CLK);
833 LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
834 }
835
836 static void write_av9110(lmc_softc_t *sc, u32 n, u32 m, u32 v, u32 x, u32 r)
837 {
838 int i;
839
840 #if 0
841 printk (LMC_PRINTF_FMT ": speed %u, %d %d %d %d %d\n",
842 LMC_PRINTF_ARGS, sc->ictl.clock_rate, n, m, v, x, r);
843 #endif
844
845 sc->lmc_gpio |= LMC_GEP_SSI_GENERATOR;
846 sc->lmc_gpio &= ~(LMC_GEP_DATA | LMC_GEP_CLK);
847 LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
848
849 /*
850 * Set the TXCLOCK, GENERATOR, SERIAL, and SERIALCLK
851 * as outputs.
852 */
853 lmc_gpio_mkoutput (sc, (LMC_GEP_DATA | LMC_GEP_CLK
854 | LMC_GEP_SSI_GENERATOR));
855
856 sc->lmc_gpio &= ~(LMC_GEP_SSI_GENERATOR);
857 LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
858
859 /*
860 * a shifting we will go...
861 */
862 for (i = 0; i < 7; i++)
863 write_av9110_bit (sc, n >> i);
864 for (i = 0; i < 7; i++)
865 write_av9110_bit (sc, m >> i);
866 for (i = 0; i < 1; i++)
867 write_av9110_bit (sc, v >> i);
868 for (i = 0; i < 2; i++)
869 write_av9110_bit (sc, x >> i);
870 for (i = 0; i < 2; i++)
871 write_av9110_bit (sc, r >> i);
872 for (i = 0; i < 5; i++)
873 write_av9110_bit (sc, 0x17 >> i);
874
875 /*
876 * stop driving serial-related signals
877 */
878 lmc_gpio_mkinput (sc,
879 (LMC_GEP_DATA | LMC_GEP_CLK
880 | LMC_GEP_SSI_GENERATOR));
881 }
882
883 static void lmc_ssi_watchdog(lmc_softc_t * const sc)
884 {
885 u16 mii17 = lmc_mii_readreg(sc, 0, 17);
886 if (((mii17 >> 3) & 7) == 7)
887 lmc_led_off(sc, LMC_MII16_LED2);
888 else
889 lmc_led_on(sc, LMC_MII16_LED2);
890 }
891
892 /*
893 * T1 methods
894 */
895
896 /*
897 * The framer regs are multiplexed through MII regs 17 & 18
898 * write the register address to MII reg 17 and the * data to MII reg 18. */
899 static void
900 lmc_t1_write (lmc_softc_t * const sc, int a, int d)
901 {
902 lmc_mii_writereg (sc, 0, 17, a);
903 lmc_mii_writereg (sc, 0, 18, d);
904 }
905
906 /* Save a warning
907 static int
908 lmc_t1_read (lmc_softc_t * const sc, int a)
909 {
910 lmc_mii_writereg (sc, 0, 17, a);
911 return lmc_mii_readreg (sc, 0, 18);
912 }
913 */
914
915
916 static void
917 lmc_t1_init (lmc_softc_t * const sc)
918 {
919 u16 mii16;
920 int i;
921
922 sc->ictl.cardtype = LMC_CTL_CARDTYPE_LMC1200;
923 mii16 = lmc_mii_readreg (sc, 0, 16);
924
925 /* reset 8370 */
926 mii16 &= ~LMC_MII16_T1_RST;
927 lmc_mii_writereg (sc, 0, 16, mii16 | LMC_MII16_T1_RST);
928 lmc_mii_writereg (sc, 0, 16, mii16);
929
930 /* set T1 or E1 line. Uses sc->lmcmii16 reg in function so update it */
931 sc->lmc_miireg16 = mii16;
932 lmc_t1_set_circuit_type(sc, LMC_CTL_CIRCUIT_TYPE_T1);
933 mii16 = sc->lmc_miireg16;
934
935 lmc_t1_write (sc, 0x01, 0x1B); /* CR0 - primary control */
936 lmc_t1_write (sc, 0x02, 0x42); /* JAT_CR - jitter atten config */
937 lmc_t1_write (sc, 0x14, 0x00); /* LOOP - loopback config */
938 lmc_t1_write (sc, 0x15, 0x00); /* DL3_TS - external data link timeslot */
939 lmc_t1_write (sc, 0x18, 0xFF); /* PIO - programmable I/O */
940 lmc_t1_write (sc, 0x19, 0x30); /* POE - programmable OE */
941 lmc_t1_write (sc, 0x1A, 0x0F); /* CMUX - clock input mux */
942 lmc_t1_write (sc, 0x20, 0x41); /* LIU_CR - RX LIU config */
943 lmc_t1_write (sc, 0x22, 0x76); /* RLIU_CR - RX LIU config */
944 lmc_t1_write (sc, 0x40, 0x03); /* RCR0 - RX config */
945 lmc_t1_write (sc, 0x45, 0x00); /* RALM - RX alarm config */
946 lmc_t1_write (sc, 0x46, 0x05); /* LATCH - RX alarm/err/cntr latch */
947 lmc_t1_write (sc, 0x68, 0x40); /* TLIU_CR - TX LIU config */
948 lmc_t1_write (sc, 0x70, 0x0D); /* TCR0 - TX framer config */
949 lmc_t1_write (sc, 0x71, 0x05); /* TCR1 - TX config */
950 lmc_t1_write (sc, 0x72, 0x0B); /* TFRM - TX frame format */
951 lmc_t1_write (sc, 0x73, 0x00); /* TERROR - TX error insert */
952 lmc_t1_write (sc, 0x74, 0x00); /* TMAN - TX manual Sa/FEBE config */
953 lmc_t1_write (sc, 0x75, 0x00); /* TALM - TX alarm signal config */
954 lmc_t1_write (sc, 0x76, 0x00); /* TPATT - TX test pattern config */
955 lmc_t1_write (sc, 0x77, 0x00); /* TLB - TX inband loopback config */
956 lmc_t1_write (sc, 0x90, 0x05); /* CLAD_CR - clock rate adapter config */
957 lmc_t1_write (sc, 0x91, 0x05); /* CSEL - clad freq sel */
958 lmc_t1_write (sc, 0xA6, 0x00); /* DL1_CTL - DL1 control */
959 lmc_t1_write (sc, 0xB1, 0x00); /* DL2_CTL - DL2 control */
960 lmc_t1_write (sc, 0xD0, 0x47); /* SBI_CR - sys bus iface config */
961 lmc_t1_write (sc, 0xD1, 0x70); /* RSB_CR - RX sys bus config */
962 lmc_t1_write (sc, 0xD4, 0x30); /* TSB_CR - TX sys bus config */
963 for (i = 0; i < 32; i++)
964 {
965 lmc_t1_write (sc, 0x0E0 + i, 0x00); /* SBCn - sys bus per-channel ctl */
966 lmc_t1_write (sc, 0x100 + i, 0x00); /* TPCn - TX per-channel ctl */
967 lmc_t1_write (sc, 0x180 + i, 0x00); /* RPCn - RX per-channel ctl */
968 }
969 for (i = 1; i < 25; i++)
970 {
971 lmc_t1_write (sc, 0x0E0 + i, 0x0D); /* SBCn - sys bus per-channel ctl */
972 }
973
974 mii16 |= LMC_MII16_T1_XOE;
975 lmc_mii_writereg (sc, 0, 16, mii16);
976 sc->lmc_miireg16 = mii16;
977 }
978
979 static void
980 lmc_t1_default (lmc_softc_t * const sc)
981 {
982 sc->lmc_miireg16 = LMC_MII16_LED_ALL;
983 sc->lmc_media->set_link_status (sc, LMC_LINK_DOWN);
984 sc->lmc_media->set_circuit_type (sc, LMC_CTL_CIRCUIT_TYPE_T1);
985 sc->lmc_media->set_crc_length (sc, LMC_CTL_CRC_LENGTH_16);
986 /* Right now we can only clock from out internal source */
987 sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_INT;
988 }
989 /* * Given a user provided state, set ourselves up to match it. This will * always reset the card if needed.
990 */
991 static void
992 lmc_t1_set_status (lmc_softc_t * const sc, lmc_ctl_t * ctl)
993 {
994 if (ctl == NULL)
995 {
996 sc->lmc_media->set_circuit_type (sc, sc->ictl.circuit_type);
997 lmc_set_protocol (sc, NULL);
998
999 return;
1000 }
1001 /*
1002 * check for change in circuit type */
1003 if (ctl->circuit_type == LMC_CTL_CIRCUIT_TYPE_T1
1004 && sc->ictl.circuit_type ==
1005 LMC_CTL_CIRCUIT_TYPE_E1) sc->lmc_media->set_circuit_type (sc,
1006 LMC_CTL_CIRCUIT_TYPE_E1);
1007 else if (ctl->circuit_type == LMC_CTL_CIRCUIT_TYPE_E1
1008 && sc->ictl.circuit_type == LMC_CTL_CIRCUIT_TYPE_T1)
1009 sc->lmc_media->set_circuit_type (sc, LMC_CTL_CIRCUIT_TYPE_T1);
1010 lmc_set_protocol (sc, ctl);
1011 }
1012 /*
1013 * return hardware link status.
1014 * 0 == link is down, 1 == link is up.
1015 */ static int
1016 lmc_t1_get_link_status (lmc_softc_t * const sc)
1017 {
1018 u16 link_status;
1019 int ret = 1;
1020
1021 /* LMC5245 (DS3) & LMC1200 (DS1) LED definitions
1022 * led0 yellow = far-end adapter is in Red alarm condition
1023 * led1 blue = received an Alarm Indication signal
1024 * (upstream failure)
1025 * led2 Green = power to adapter, Gate Array loaded & driver
1026 * attached
1027 * led3 red = Loss of Signal (LOS) or out of frame (OOF)
1028 * conditions detected on T3 receive signal
1029 */
1030 lmc_trace(sc->lmc_device, "lmc_t1_get_link_status in");
1031 lmc_led_on(sc, LMC_DS3_LED2);
1032
1033 lmc_mii_writereg (sc, 0, 17, T1FRAMER_ALARM1_STATUS);
1034 link_status = lmc_mii_readreg (sc, 0, 18);
1035
1036
1037 if (link_status & T1F_RAIS) { /* turn on blue LED */
1038 ret = 0;
1039 if(sc->last_led_err[1] != 1){
1040 printk(KERN_WARNING "%s: Receive AIS/Blue Alarm. Far end in RED alarm\n", sc->name);
1041 }
1042 lmc_led_on(sc, LMC_DS3_LED1);
1043 sc->last_led_err[1] = 1;
1044 }
1045 else {
1046 if(sc->last_led_err[1] != 0){
1047 printk(KERN_WARNING "%s: End AIS/Blue Alarm\n", sc->name);
1048 }
1049 lmc_led_off (sc, LMC_DS3_LED1);
1050 sc->last_led_err[1] = 0;
1051 }
1052
1053 /*
1054 * Yellow Alarm is nasty evil stuff, looks at data patterns
1055 * inside the channel and confuses it with HDLC framing
1056 * ignore all yellow alarms.
1057 *
1058 * Do listen to MultiFrame Yellow alarm which while implemented
1059 * different ways isn't in the channel and hence somewhat
1060 * more reliable
1061 */
1062
1063 if (link_status & T1F_RMYEL) {
1064 ret = 0;
1065 if(sc->last_led_err[0] != 1){
1066 printk(KERN_WARNING "%s: Receive Yellow AIS Alarm\n", sc->name);
1067 }
1068 lmc_led_on(sc, LMC_DS3_LED0);
1069 sc->last_led_err[0] = 1;
1070 }
1071 else {
1072 if(sc->last_led_err[0] != 0){
1073 printk(KERN_WARNING "%s: End of Yellow AIS Alarm\n", sc->name);
1074 }
1075 lmc_led_off(sc, LMC_DS3_LED0);
1076 sc->last_led_err[0] = 0;
1077 }
1078
1079 /*
1080 * Loss of signal and los of frame
1081 * Use the green bit to identify which one lit the led
1082 */
1083 if(link_status & T1F_RLOF){
1084 ret = 0;
1085 if(sc->last_led_err[3] != 1){
1086 printk(KERN_WARNING "%s: Local Red Alarm: Loss of Framing\n", sc->name);
1087 }
1088 lmc_led_on(sc, LMC_DS3_LED3);
1089 sc->last_led_err[3] = 1;
1090
1091 }
1092 else {
1093 if(sc->last_led_err[3] != 0){
1094 printk(KERN_WARNING "%s: End Red Alarm (LOF)\n", sc->name);
1095 }
1096 if( ! (link_status & T1F_RLOS))
1097 lmc_led_off(sc, LMC_DS3_LED3);
1098 sc->last_led_err[3] = 0;
1099 }
1100
1101 if(link_status & T1F_RLOS){
1102 ret = 0;
1103 if(sc->last_led_err[2] != 1){
1104 printk(KERN_WARNING "%s: Local Red Alarm: Loss of Signal\n", sc->name);
1105 }
1106 lmc_led_on(sc, LMC_DS3_LED3);
1107 sc->last_led_err[2] = 1;
1108
1109 }
1110 else {
1111 if(sc->last_led_err[2] != 0){
1112 printk(KERN_WARNING "%s: End Red Alarm (LOS)\n", sc->name);
1113 }
1114 if( ! (link_status & T1F_RLOF))
1115 lmc_led_off(sc, LMC_DS3_LED3);
1116 sc->last_led_err[2] = 0;
1117 }
1118
1119 sc->lmc_xinfo.t1_alarm1_status = link_status;
1120
1121 lmc_mii_writereg (sc, 0, 17, T1FRAMER_ALARM2_STATUS);
1122 sc->lmc_xinfo.t1_alarm2_status = lmc_mii_readreg (sc, 0, 18);
1123
1124
1125 lmc_trace(sc->lmc_device, "lmc_t1_get_link_status out");
1126
1127 return ret;
1128 }
1129
1130 /*
1131 * 1 == T1 Circuit Type , 0 == E1 Circuit Type
1132 */
1133 static void
1134 lmc_t1_set_circuit_type (lmc_softc_t * const sc, int ie)
1135 {
1136 if (ie == LMC_CTL_CIRCUIT_TYPE_T1) {
1137 sc->lmc_miireg16 |= LMC_MII16_T1_Z;
1138 sc->ictl.circuit_type = LMC_CTL_CIRCUIT_TYPE_T1;
1139 printk(KERN_INFO "%s: In T1 Mode\n", sc->name);
1140 }
1141 else {
1142 sc->lmc_miireg16 &= ~LMC_MII16_T1_Z;
1143 sc->ictl.circuit_type = LMC_CTL_CIRCUIT_TYPE_E1;
1144 printk(KERN_INFO "%s: In E1 Mode\n", sc->name);
1145 }
1146
1147 lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
1148
1149 }
1150
1151 /*
1152 * 0 == 16bit, 1 == 32bit */
1153 static void
1154 lmc_t1_set_crc_length (lmc_softc_t * const sc, int state)
1155 {
1156 if (state == LMC_CTL_CRC_LENGTH_32)
1157 {
1158 /* 32 bit */
1159 sc->lmc_miireg16 |= LMC_MII16_T1_CRC;
1160 sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_32;
1161 sc->lmc_crcSize = LMC_CTL_CRC_BYTESIZE_4;
1162
1163 }
1164 else
1165 {
1166 /* 16 bit */ sc->lmc_miireg16 &= ~LMC_MII16_T1_CRC;
1167 sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_16;
1168 sc->lmc_crcSize = LMC_CTL_CRC_BYTESIZE_2;
1169
1170 }
1171
1172 lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
1173 }
1174
1175 /*
1176 * 1 == internal, 0 == external
1177 */
1178 static void
1179 lmc_t1_set_clock (lmc_softc_t * const sc, int ie)
1180 {
1181 int old;
1182 old = ie;
1183 if (ie == LMC_CTL_CLOCK_SOURCE_EXT)
1184 {
1185 sc->lmc_gpio &= ~(LMC_GEP_SSI_TXCLOCK);
1186 LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
1187 sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_EXT;
1188 if(old != ie)
1189 printk (LMC_PRINTF_FMT ": clock external\n", LMC_PRINTF_ARGS);
1190 }
1191 else
1192 {
1193 sc->lmc_gpio |= LMC_GEP_SSI_TXCLOCK;
1194 LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
1195 sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_INT;
1196 if(old != ie)
1197 printk (LMC_PRINTF_FMT ": clock internal\n", LMC_PRINTF_ARGS);
1198 }
1199 }
1200
1201 static void
1202 lmc_t1_watchdog (lmc_softc_t * const sc)
1203 {
1204 }
1205
1206 static void
1207 lmc_set_protocol (lmc_softc_t * const sc, lmc_ctl_t * ctl)
1208 {
1209 if (!ctl)
1210 sc->ictl.keepalive_onoff = LMC_CTL_ON;
1211 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree