1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2021 Gateworks Corporation
4 */
5
6 #include <common.h>
7 #include <command.h>
8 #include <hang.h>
9 #include <hexdump.h>
10 #include <i2c.h>
11 #include <linux/delay.h>
12 #include <dm/uclass.h>
13
14 #include "gsc.h"
15
16 DECLARE_GLOBAL_DATA_PTR;
17
18 struct venice_board_info som_info;
19 struct venice_board_info base_info;
20 char venice_model[32];
21
22 /* return a mac address from EEPROM info */
gsc_getmac(int index,uint8_t * address)23 int gsc_getmac(int index, uint8_t *address)
24 {
25 int i, j;
26 u32 maclow, machigh;
27 u64 mac;
28
29 j = 0;
30 if (som_info.macno) {
31 maclow = som_info.mac[5];
32 maclow |= som_info.mac[4] << 8;
33 maclow |= som_info.mac[3] << 16;
34 maclow |= som_info.mac[2] << 24;
35 machigh = som_info.mac[1];
36 machigh |= som_info.mac[0] << 8;
37 mac = machigh;
38 mac <<= 32;
39 mac |= maclow;
40 for (i = 0; i < som_info.macno; i++, j++) {
41 if (index == j)
42 goto out;
43 }
44 }
45
46 maclow = base_info.mac[5];
47 maclow |= base_info.mac[4] << 8;
48 maclow |= base_info.mac[3] << 16;
49 maclow |= base_info.mac[2] << 24;
50 machigh = base_info.mac[1];
51 machigh |= base_info.mac[0] << 8;
52 mac = machigh;
53 mac <<= 32;
54 mac |= maclow;
55 for (i = 0; i < base_info.macno; i++, j++) {
56 if (index == j)
57 goto out;
58 }
59
60 return -EINVAL;
61
62 out:
63 mac += i;
64 address[0] = (mac >> 40) & 0xff;
65 address[1] = (mac >> 32) & 0xff;
66 address[2] = (mac >> 24) & 0xff;
67 address[3] = (mac >> 16) & 0xff;
68 address[4] = (mac >> 8) & 0xff;
69 address[5] = (mac >> 0) & 0xff;
70
71 return 0;
72 }
73
74 /* System Controller registers */
75 enum {
76 GSC_SC_CTRL0 = 0,
77 GSC_SC_CTRL1 = 1,
78 GSC_SC_STATUS = 10,
79 GSC_SC_FWCRC = 12,
80 GSC_SC_FWVER = 14,
81 GSC_SC_WP = 15,
82 GSC_SC_RST_CAUSE = 16,
83 GSC_SC_THERM_PROTECT = 19,
84 };
85
86 /* System Controller Control1 bits */
87 enum {
88 GSC_SC_CTRL1_WDTIME = 4, /* 1 = 60s timeout, 0 = 30s timeout */
89 GSC_SC_CTRL1_WDEN = 5, /* 1 = enable, 0 = disable */
90 GSC_SC_CTRL1_BOOT_CHK = 6, /* 1 = enable alt boot check */
91 GSC_SC_CTRL1_WDDIS = 7, /* 1 = disable boot watchdog */
92 };
93
94 /* System Controller Interrupt bits */
95 enum {
96 GSC_SC_IRQ_PB = 0, /* Pushbutton switch */
97 GSC_SC_IRQ_SECURE = 1, /* Secure Key erase operation complete */
98 GSC_SC_IRQ_EEPROM_WP = 2, /* EEPROM write violation */
99 GSC_SC_IRQ_GPIO = 4, /* GPIO change */
100 GSC_SC_IRQ_TAMPER = 5, /* Tamper detect */
101 GSC_SC_IRQ_WATCHDOG = 6, /* Watchdog trip */
102 GSC_SC_IRQ_PBLONG = 7, /* Pushbutton long hold */
103 };
104
105 /* System Controller WP bits */
106 enum {
107 GSC_SC_WP_ALL = 0, /* Write Protect All EEPROM regions */
108 GSC_SC_WP_BOARDINFO = 1, /* Write Protect Board Info region */
109 };
110
111 /* System Controller Reset Cause */
112 enum {
113 GSC_SC_RST_CAUSE_VIN = 0,
114 GSC_SC_RST_CAUSE_PB = 1,
115 GSC_SC_RST_CAUSE_WDT = 2,
116 GSC_SC_RST_CAUSE_CPU = 3,
117 GSC_SC_RST_CAUSE_TEMP_LOCAL = 4,
118 GSC_SC_RST_CAUSE_TEMP_REMOTE = 5,
119 GSC_SC_RST_CAUSE_SLEEP = 6,
120 GSC_SC_RST_CAUSE_BOOT_WDT = 7,
121 GSC_SC_RST_CAUSE_BOOT_WDT_MAN = 8,
122 GSC_SC_RST_CAUSE_SOFT_PWR = 9,
123 GSC_SC_RST_CAUSE_MAX = 10,
124 };
125
gsc_get_dev(int busno,int slave)126 static struct udevice *gsc_get_dev(int busno, int slave)
127 {
128 struct udevice *dev;
129 int ret;
130
131 #if (IS_ENABLED(CONFIG_SPL_BUILD))
132 ret = i2c_get_chip_for_busnum(busno + 1, slave, 1, &dev);
133 if (ret)
134 return NULL;
135 #else
136 struct udevice *bus;
137
138 busno--;
139
140 ret = uclass_get_device_by_seq(UCLASS_I2C, busno, &bus);
141 if (ret) {
142 printf("i2c%d: no bus %d\n", busno + 1, ret);
143 return NULL;
144 }
145 ret = i2c_get_chip(bus, slave, 1, &dev);
146 if (ret) {
147 printf("i2c%d@0x%02x: no chip %d\n", busno + 1, slave, ret);
148 return NULL;
149 }
150 #endif
151
152 return dev;
153 }
154
gsc_read_eeprom(int bus,int slave,int alen,struct venice_board_info * info)155 static int gsc_read_eeprom(int bus, int slave, int alen, struct venice_board_info *info)
156 {
157 int i;
158 int chksum;
159 unsigned char *buf = (unsigned char *)info;
160 struct udevice *dev;
161 int ret;
162
163 /* probe device */
164 dev = gsc_get_dev(bus, slave);
165 if (!dev) {
166 if (slave == GSC_EEPROM_ADDR)
167 puts("ERROR: Failed to probe EEPROM\n");
168 return -ENODEV;
169 }
170
171 /* read eeprom config section */
172 memset(info, 0, sizeof(*info));
173 ret = i2c_set_chip_offset_len(dev, alen);
174 if (ret) {
175 puts("EEPROM: Failed to set alen\n");
176 return ret;
177 }
178 ret = dm_i2c_read(dev, 0x00, buf, sizeof(*info));
179 if (ret) {
180 if (slave == GSC_EEPROM_ADDR)
181 printf("EEPROM: Failed to read EEPROM\n");
182 return ret;
183 }
184
185 /* validate checksum */
186 for (chksum = 0, i = 0; i < (int)sizeof(*info) - 2; i++)
187 chksum += buf[i];
188 if ((info->chksum[0] != chksum >> 8) ||
189 (info->chksum[1] != (chksum & 0xff))) {
190 printf("EEPROM: I2C%d@0x%02x: Invalid Model in EEPROM\n", bus, slave);
191 print_hex_dump_bytes("", DUMP_PREFIX_NONE, buf, sizeof(*info));
192 memset(info, 0, sizeof(*info));
193 return -EINVAL;
194 }
195
196 /* sanity check valid model */
197 if (info->model[0] != 'G' || info->model[1] != 'W') {
198 printf("EEPROM: I2C%d@0x%02x: Invalid Model in EEPROM\n", bus, slave);
199 print_hex_dump_bytes("", DUMP_PREFIX_NONE, buf, sizeof(*info));
200 memset(info, 0, sizeof(*info));
201 return -EINVAL;
202 }
203
204 return 0;
205 }
206
gsc_get_rst_cause(struct udevice * dev)207 static const char *gsc_get_rst_cause(struct udevice *dev)
208 {
209 static char str[64];
210 static const char * const names[] = {
211 "VIN",
212 "PB",
213 "WDT",
214 "CPU",
215 "TEMP_L",
216 "TEMP_R",
217 "SLEEP",
218 "BOOT_WDT1",
219 "BOOT_WDT2",
220 "SOFT_PWR",
221 };
222 unsigned char reg;
223
224 /* reset cause */
225 str[0] = 0;
226 if (!dm_i2c_read(dev, GSC_SC_RST_CAUSE, ®, 1)) {
227 if (reg < ARRAY_SIZE(names))
228 sprintf(str, "%s", names[reg]);
229 else
230 sprintf(str, "0x%02x", reg);
231 }
232
233 /* thermal protection */
234 if (!dm_i2c_read(dev, GSC_SC_THERM_PROTECT, ®, 1)) {
235 reg |= 1;
236 dm_i2c_write(dev, GSC_SC_THERM_PROTECT, ®, 1);
237 strcat(str, " Thermal Protection Enabled");
238 }
239
240 return str;
241 }
242
243 /* display hardware monitor ADC channels */
gsc_hwmon(void)244 int gsc_hwmon(void)
245 {
246 const void *fdt = gd->fdt_blob;
247 struct udevice *dev;
248 int node, reg, mode, len, val, offset;
249 const char *label;
250 u8 buf[2];
251 int ret;
252
253 node = fdt_node_offset_by_compatible(fdt, -1, "gw,gsc-adc");
254 if (node <= 0)
255 return node;
256
257 /* probe device */
258 dev = gsc_get_dev(1, GSC_HWMON_ADDR);
259 if (!dev) {
260 puts("ERROR: Failed to probe GSC HWMON\n");
261 return -ENODEV;
262 }
263
264 /* iterate over hwmon nodes */
265 node = fdt_first_subnode(fdt, node);
266 while (node > 0) {
267 reg = fdtdec_get_int(fdt, node, "reg", -1);
268 mode = fdtdec_get_int(fdt, node, "gw,mode", -1);
269 offset = fdtdec_get_int(fdt, node, "gw,voltage-offset-microvolt", 0);
270 label = fdt_stringlist_get(fdt, node, "label", 0, NULL);
271
272 if ((reg == -1) || (mode == -1) || !label)
273 printf("invalid dt:%s\n", fdt_get_name(fdt, node, NULL));
274
275 memset(buf, 0, sizeof(buf));
276 ret = dm_i2c_read(dev, reg, buf, sizeof(buf));
277 if (ret) {
278 printf("i2c error: %d\n", ret);
279 continue;
280 }
281 val = buf[0] | buf[1] << 8;
282 if (val >= 0) {
283 const u32 *div;
284 int r[2];
285
286 switch (mode) {
287 case 0: /* temperature (C*10) */
288 if (val > 0x8000)
289 val -= 0xffff;
290 printf("%-8s: %d.%ldC\n", label, val / 10, abs(val % 10));
291 break;
292 case 1: /* prescaled voltage */
293 if (val != 0xffff)
294 printf("%-8s: %d.%03dV\n", label, val / 1000, val % 1000);
295 break;
296 case 2: /* scaled based on ref volt and resolution */
297 val *= 2500;
298 val /= 1 << 12;
299
300 /* apply pre-scaler voltage divider */
301 div = fdt_getprop(fdt, node, "gw,voltage-divider-ohms", &len);
302 if (div && (len == sizeof(uint32_t) * 2)) {
303 r[0] = fdt32_to_cpu(div[0]);
304 r[1] = fdt32_to_cpu(div[1]);
305 if (r[0] && r[1]) {
306 val *= (r[0] + r[1]);
307 val /= r[1];
308 }
309 }
310
311 /* adjust by offset */
312 val += offset;
313
314 printf("%-8s: %d.%03dV\n", label, val / 1000, val % 1000);
315 break;
316 }
317 }
318 node = fdt_next_subnode(fdt, node);
319 }
320
321 return 0;
322 }
323
324 /* determine BOM revision from model */
get_bom_rev(const char * str)325 int get_bom_rev(const char *str)
326 {
327 int rev_bom = 0;
328 int i;
329
330 for (i = strlen(str) - 1; i > 0; i--) {
331 if (str[i] == '-')
332 break;
333 if (str[i] >= '1' && str[i] <= '9') {
334 rev_bom = str[i] - '0';
335 break;
336 }
337 }
338 return rev_bom;
339 }
340
341 /* determine PCB revision from model */
get_pcb_rev(const char * str)342 char get_pcb_rev(const char *str)
343 {
344 char rev_pcb = 'A';
345 int i;
346
347 for (i = strlen(str) - 1; i > 0; i--) {
348 if (str[i] == '-')
349 break;
350 if (str[i] >= 'A') {
351 rev_pcb = str[i];
352 break;
353 }
354 }
355 return rev_pcb;
356 }
357
358 /*
359 * get dt name based on model and detail level:
360 *
361 * For boards that are a combination of a SoM plus a Baseboard:
362 * Venice SoM part numbers are GW70xx where xx is:
363 * 7000-7019: same PCB with som dt of '0x'
364 * 7020-7039: same PCB with som dt of '2x'
365 * 7040-7059: same PCB with som dt of '4x'
366 * 7060-7079: same PCB with som dt of '6x'
367 * 7080-7099: same PCB with som dt of '8x'
368 * Venice Baseboard part numbers are GW7xxx where xxx is:
369 * 7100-7199: same PCB with base dt of '71xx'
370 * 7200-7299: same PCB with base dt of '72xx'
371 * 7300-7399: same PCB with base dt of '73xx'
372 * 7400-7499: same PCB with base dt of '74xx'
373 * 7500-7599: same PCB with base dt of '75xx'
374 * 7600-7699: same PCB with base dt of '76xx'
375 * 7700-7799: same PCB with base dt of '77xx'
376 * 7800-7899: same PCB with base dt of '78xx'
377 * DT name is comprised of:
378 * gw<base dt>-<som dt>-[base-pcb-rev][base-bom-rev][som-pcb-rev][som-bom-rev]
379 *
380 * For board models from 7900-7999 each PCB is unique with its own dt:
381 * DT name is comprised:
382 * gw<model>-[pcb-rev][bom-rev]
383 *
384 */
385 #define snprintfcat(dest, sz, fmt, ...) \
386 snprintf((dest) + strlen(dest), (sz) - strlen(dest), fmt, ##__VA_ARGS__)
gsc_get_dtb_name(int level,char * buf,int sz)387 const char *gsc_get_dtb_name(int level, char *buf, int sz)
388 {
389 const char *pre = "imx8mm-venice-gw";
390 int model, rev_pcb, rev_bom;
391
392 model = ((som_info.model[2] - '0') * 1000)
393 + ((som_info.model[3] - '0') * 100)
394 + ((som_info.model[4] - '0') * 10)
395 + (som_info.model[5] - '0');
396 rev_pcb = tolower(get_pcb_rev(som_info.model));
397 rev_bom = get_bom_rev(som_info.model);
398
399 /* som + baseboard*/
400 if (base_info.model[0]) {
401 /* baseboard id: 7100-7199->71; 7200-7299->72; etc */
402 int base = ((base_info.model[2] - '0') * 10) + (base_info.model[3] - '0');
403 /* som id: 7000-7019->1; 7020-7039->2; etc */
404 int som = ((model % 100) / 20) * 2;
405 int rev_base_pcb = tolower(get_pcb_rev(base_info.model));
406 int rev_base_bom = get_bom_rev(base_info.model);
407
408 snprintf(buf, sz, "%s%2dxx-%dx", pre, base, som);
409 switch (level) {
410 case 0: /* full model (ie gw73xx-0x-a1a1) */
411 if (rev_base_bom)
412 snprintfcat(buf, sz, "-%c%d", rev_base_pcb, rev_base_bom);
413 else
414 snprintfcat(buf, sz, "-%c", rev_base_pcb);
415 if (rev_bom)
416 snprintfcat(buf, sz, "%c%d", rev_pcb, rev_bom);
417 else
418 snprintfcat(buf, sz, "%c", rev_pcb);
419 break;
420 case 1: /* don't care about SoM revision */
421 if (rev_base_bom)
422 snprintfcat(buf, sz, "-%c%d", rev_base_pcb, rev_base_bom);
423 else
424 snprintfcat(buf, sz, "-%c", rev_base_pcb);
425 snprintfcat(buf, sz, "xx");
426 break;
427 case 2: /* don't care about baseboard revision */
428 snprintfcat(buf, sz, "-xx");
429 if (rev_bom)
430 snprintfcat(buf, sz, "%c%d", rev_pcb, rev_bom);
431 else
432 snprintfcat(buf, sz, "%c", rev_pcb);
433 break;
434 case 3: /* don't care about SoM/baseboard revision */
435 break;
436 default:
437 return NULL;
438 }
439 } else {
440 snprintf(buf, sz, "%s%04d", pre, model);
441 switch (level) {
442 case 0: /* full model wth PCB and BOM revision first (ie gw7901-a1) */
443 if (rev_bom)
444 snprintfcat(buf, sz, "-%c%d", rev_pcb, rev_bom);
445 else
446 snprintfcat(buf, sz, "-%c", rev_pcb);
447 break;
448 case 1: /* don't care about BOM revision */
449 snprintfcat(buf, sz, "-%c", rev_pcb);
450 break;
451 case 2: /* don't care about PCB or BOM revision */
452 break;
453 default:
454 return NULL;
455 }
456 }
457
458 return buf;
459 }
460
gsc_read(void)461 static int gsc_read(void)
462 {
463 int ret;
464
465 ret = gsc_read_eeprom(1, GSC_EEPROM_ADDR, 1, &som_info);
466 if (ret) {
467 memset(&som_info, 0, sizeof(som_info));
468 return ret;
469 }
470
471 /* read optional baseboard EEPROM */
472 return gsc_read_eeprom(2, 0x52, 2, &base_info);
473 }
474
gsc_info(int verbose)475 static int gsc_info(int verbose)
476 {
477 struct udevice *dev;
478 unsigned char buf[16];
479 char rev_pcb;
480 int rev_bom;
481
482 if (!base_info.model[0]) {
483 strcpy(venice_model, som_info.model);
484 printf("Model : %s\n", som_info.model);
485 printf("Serial : %d\n", som_info.serial);
486 printf("MFGDate : %02x-%02x-%02x%02x\n",
487 som_info.mfgdate[0], som_info.mfgdate[1],
488 som_info.mfgdate[2], som_info.mfgdate[3]);
489 } else {
490 sprintf(venice_model, "GW%c%c%c%c-%c%c-",
491 som_info.model[2], /* family */
492 base_info.model[3], /* baseboard */
493 base_info.model[4], base_info.model[5], /* subload of baseboard */
494 som_info.model[4], som_info.model[5]); /* last 2digits of SOM */
495
496 /* baseboard revision */
497 rev_pcb = get_pcb_rev(base_info.model);
498 rev_bom = get_bom_rev(base_info.model);
499 if (rev_bom)
500 sprintf(venice_model + strlen(venice_model), "%c%d", rev_pcb, rev_bom);
501 else
502 sprintf(venice_model + strlen(venice_model), "%c", rev_pcb);
503 /* som revision */
504 rev_pcb = get_pcb_rev(som_info.model);
505 rev_bom = get_bom_rev(som_info.model);
506 if (rev_bom)
507 sprintf(venice_model + strlen(venice_model), "%c%d", rev_pcb, rev_bom);
508 else
509 sprintf(venice_model + strlen(venice_model), "%c", rev_pcb);
510
511 if (verbose > 1) {
512 printf("SOM : %s %d %02x-%02x-%02x%02x\n",
513 som_info.model, som_info.serial,
514 som_info.mfgdate[0], som_info.mfgdate[1],
515 som_info.mfgdate[2], som_info.mfgdate[3]);
516 printf("BASE : %s %d %02x-%02x-%02x%02x\n",
517 base_info.model, base_info.serial,
518 base_info.mfgdate[0], base_info.mfgdate[1],
519 base_info.mfgdate[2], base_info.mfgdate[3]);
520 }
521 printf("Model : %s\n", venice_model);
522 printf("Serial : %d\n", som_info.serial);
523 printf("MFGDate : %02x-%02x-%02x%02x\n",
524 som_info.mfgdate[0], som_info.mfgdate[1],
525 som_info.mfgdate[2], som_info.mfgdate[3]);
526 }
527
528 /* Display RTC */
529 puts("RTC : ");
530 dev = gsc_get_dev(1, GSC_RTC_ADDR);
531 if (!dev) {
532 puts("Failed to probe GSC RTC\n");
533 } else {
534 dm_i2c_read(dev, 0, buf, 6);
535 printf("%d\n", buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24);
536 }
537
538 return 0;
539 }
540
gsc_init(int quiet)541 int gsc_init(int quiet)
542 {
543 unsigned char buf[16];
544 struct udevice *dev;
545 int ret;
546
547 /*
548 * On a board with a missing/depleted backup battery for GSC, the
549 * board may be ready to probe the GSC before its firmware is
550 * running. We will wait here indefinately for the GSC/EEPROM.
551 */
552 while (1) {
553 /* probe device */
554 dev = gsc_get_dev(1, GSC_SC_ADDR);
555 if (dev)
556 break;
557 mdelay(1);
558 }
559
560 ret = dm_i2c_read(dev, 0, buf, sizeof(buf));
561 if (ret) {
562 puts("ERROR: Failed reading GSC\n");
563 return ret;
564 }
565 gsc_read();
566
567 /* banner */
568 if (!quiet) {
569 printf("GSC : v%d 0x%04x", buf[GSC_SC_FWVER],
570 buf[GSC_SC_FWCRC] | buf[GSC_SC_FWCRC + 1] << 8);
571 printf(" RST:%s", gsc_get_rst_cause(dev));
572 printf("\n");
573 gsc_info(1);
574 }
575
576 if (ret)
577 hang();
578
579 return ((16 << som_info.sdram_size) / 1024);
580 }
581
gsc_get_model(void)582 const char *gsc_get_model(void)
583 {
584 return venice_model;
585 }
586
587 #if !(IS_ENABLED(CONFIG_SPL_BUILD))
gsc_sleep(unsigned long secs)588 static int gsc_sleep(unsigned long secs)
589 {
590 unsigned char reg;
591 struct udevice *dev;
592 int ret;
593
594 /* probe device */
595 dev = gsc_get_dev(1, GSC_SC_ADDR);
596 if (!dev)
597 return -ENODEV;
598
599 printf("GSC Sleeping for %ld seconds\n", secs);
600 reg = (secs >> 24) & 0xff;
601 ret = dm_i2c_write(dev, 9, ®, 1);
602 if (ret)
603 goto err;
604 reg = (secs >> 16) & 0xff;
605 ret = dm_i2c_write(dev, 8, ®, 1);
606 if (ret)
607 goto err;
608 reg = (secs >> 8) & 0xff;
609 ret = dm_i2c_write(dev, 7, ®, 1);
610 if (ret)
611 goto err;
612 reg = secs & 0xff;
613 ret = dm_i2c_write(dev, 6, ®, 1);
614 if (ret)
615 goto err;
616 ret = dm_i2c_read(dev, GSC_SC_CTRL1, ®, 1);
617 if (ret)
618 goto err;
619 reg |= (1 << 2);
620 ret = dm_i2c_write(dev, GSC_SC_CTRL1, ®, 1);
621 if (ret)
622 goto err;
623 reg &= ~(1 << 2);
624 reg |= 0x3;
625 ret = dm_i2c_write(dev, GSC_SC_CTRL1, ®, 1);
626 if (ret)
627 goto err;
628
629 return 0;
630
631 err:
632 printf("i2c error\n");
633 return ret;
634 }
635
gsc_boot_wd_disable(void)636 static int gsc_boot_wd_disable(void)
637 {
638 u8 reg;
639 struct udevice *dev;
640 int ret;
641
642 /* probe device */
643 dev = gsc_get_dev(1, GSC_SC_ADDR);
644 if (!dev)
645 return -ENODEV;
646
647 ret = dm_i2c_read(dev, GSC_SC_CTRL1, ®, 1);
648 if (ret)
649 goto err;
650 reg |= (1 << GSC_SC_CTRL1_WDDIS);
651 reg &= ~(1 << GSC_SC_CTRL1_BOOT_CHK);
652 ret = dm_i2c_write(dev, GSC_SC_CTRL1, ®, 1);
653 if (ret)
654 goto err;
655 puts("GSC : boot watchdog disabled\n");
656
657 return 0;
658
659 err:
660 printf("i2c error");
661 return ret;
662 }
663
do_gsc(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])664 static int do_gsc(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[])
665 {
666 if (argc < 2)
667 return gsc_info(2);
668
669 if (strcasecmp(argv[1], "sleep") == 0) {
670 if (argc < 3)
671 return CMD_RET_USAGE;
672 if (!gsc_sleep(simple_strtoul(argv[2], NULL, 10)))
673 return CMD_RET_SUCCESS;
674 } else if (strcasecmp(argv[1], "hwmon") == 0) {
675 if (!gsc_hwmon())
676 return CMD_RET_SUCCESS;
677 } else if (strcasecmp(argv[1], "wd-disable") == 0) {
678 if (!gsc_boot_wd_disable())
679 return CMD_RET_SUCCESS;
680 }
681
682 return CMD_RET_USAGE;
683 }
684
685 U_BOOT_CMD(gsc, 4, 1, do_gsc, "Gateworks System Controller",
686 "[sleep <secs>]|[hwmon]|[wd-disable]\n");
687 #endif
688