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Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[mirror_ubuntu-artful-kernel.git] / drivers / mfd / twl4030-power.c
1 /*
2 * linux/drivers/i2c/chips/twl4030-power.c
3 *
4 * Handle TWL4030 Power initialization
5 *
6 * Copyright (C) 2008 Nokia Corporation
7 * Copyright (C) 2006 Texas Instruments, Inc
8 *
9 * Written by Kalle Jokiniemi
10 * Peter De Schrijver <peter.de-schrijver@nokia.com>
11 * Several fixes by Amit Kucheria <amit.kucheria@verdurent.com>
12 *
13 * This file is subject to the terms and conditions of the GNU General
14 * Public License. See the file "COPYING" in the main directory of this
15 * archive for more details.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 */
26
27 #include <linux/module.h>
28 #include <linux/pm.h>
29 #include <linux/i2c/twl.h>
30 #include <linux/platform_device.h>
31 #include <linux/of.h>
32 #include <linux/of_device.h>
33
34 #include <asm/mach-types.h>
35
36 static u8 twl4030_start_script_address = 0x2b;
37
38 /* Register bits for P1, P2 and P3_SW_EVENTS */
39 #define PWR_STOPON_PRWON BIT(6)
40 #define PWR_STOPON_SYSEN BIT(5)
41 #define PWR_ENABLE_WARMRESET BIT(4)
42 #define PWR_LVL_WAKEUP BIT(3)
43 #define PWR_DEVACT BIT(2)
44 #define PWR_DEVSLP BIT(1)
45 #define PWR_DEVOFF BIT(0)
46
47 /* Register bits for CFG_P1_TRANSITION (also for P2 and P3) */
48 #define STARTON_SWBUG BIT(7) /* Start on watchdog */
49 #define STARTON_VBUS BIT(5) /* Start on VBUS */
50 #define STARTON_VBAT BIT(4) /* Start on battery insert */
51 #define STARTON_RTC BIT(3) /* Start on RTC */
52 #define STARTON_USB BIT(2) /* Start on USB host */
53 #define STARTON_CHG BIT(1) /* Start on charger */
54 #define STARTON_PWON BIT(0) /* Start on PWRON button */
55
56 #define SEQ_OFFSYNC (1 << 0)
57
58 #define PHY_TO_OFF_PM_MASTER(p) (p - 0x36)
59 #define PHY_TO_OFF_PM_RECEIVER(p) (p - 0x5b)
60
61 /* resource - hfclk */
62 #define R_HFCLKOUT_DEV_GRP PHY_TO_OFF_PM_RECEIVER(0xe6)
63
64 /* PM events */
65 #define R_P1_SW_EVENTS PHY_TO_OFF_PM_MASTER(0x46)
66 #define R_P2_SW_EVENTS PHY_TO_OFF_PM_MASTER(0x47)
67 #define R_P3_SW_EVENTS PHY_TO_OFF_PM_MASTER(0x48)
68 #define R_CFG_P1_TRANSITION PHY_TO_OFF_PM_MASTER(0x36)
69 #define R_CFG_P2_TRANSITION PHY_TO_OFF_PM_MASTER(0x37)
70 #define R_CFG_P3_TRANSITION PHY_TO_OFF_PM_MASTER(0x38)
71
72 #define END_OF_SCRIPT 0x3f
73
74 #define R_SEQ_ADD_A2S PHY_TO_OFF_PM_MASTER(0x55)
75 #define R_SEQ_ADD_S2A12 PHY_TO_OFF_PM_MASTER(0x56)
76 #define R_SEQ_ADD_S2A3 PHY_TO_OFF_PM_MASTER(0x57)
77 #define R_SEQ_ADD_WARM PHY_TO_OFF_PM_MASTER(0x58)
78 #define R_MEMORY_ADDRESS PHY_TO_OFF_PM_MASTER(0x59)
79 #define R_MEMORY_DATA PHY_TO_OFF_PM_MASTER(0x5a)
80
81 /* resource configuration registers
82 <RESOURCE>_DEV_GRP at address 'n+0'
83 <RESOURCE>_TYPE at address 'n+1'
84 <RESOURCE>_REMAP at address 'n+2'
85 <RESOURCE>_DEDICATED at address 'n+3'
86 */
87 #define DEV_GRP_OFFSET 0
88 #define TYPE_OFFSET 1
89 #define REMAP_OFFSET 2
90 #define DEDICATED_OFFSET 3
91
92 /* Bit positions in the registers */
93
94 /* <RESOURCE>_DEV_GRP */
95 #define DEV_GRP_SHIFT 5
96 #define DEV_GRP_MASK (7 << DEV_GRP_SHIFT)
97
98 /* <RESOURCE>_TYPE */
99 #define TYPE_SHIFT 0
100 #define TYPE_MASK (7 << TYPE_SHIFT)
101 #define TYPE2_SHIFT 3
102 #define TYPE2_MASK (3 << TYPE2_SHIFT)
103
104 /* <RESOURCE>_REMAP */
105 #define SLEEP_STATE_SHIFT 0
106 #define SLEEP_STATE_MASK (0xf << SLEEP_STATE_SHIFT)
107 #define OFF_STATE_SHIFT 4
108 #define OFF_STATE_MASK (0xf << OFF_STATE_SHIFT)
109
110 static u8 res_config_addrs[] = {
111 [RES_VAUX1] = 0x17,
112 [RES_VAUX2] = 0x1b,
113 [RES_VAUX3] = 0x1f,
114 [RES_VAUX4] = 0x23,
115 [RES_VMMC1] = 0x27,
116 [RES_VMMC2] = 0x2b,
117 [RES_VPLL1] = 0x2f,
118 [RES_VPLL2] = 0x33,
119 [RES_VSIM] = 0x37,
120 [RES_VDAC] = 0x3b,
121 [RES_VINTANA1] = 0x3f,
122 [RES_VINTANA2] = 0x43,
123 [RES_VINTDIG] = 0x47,
124 [RES_VIO] = 0x4b,
125 [RES_VDD1] = 0x55,
126 [RES_VDD2] = 0x63,
127 [RES_VUSB_1V5] = 0x71,
128 [RES_VUSB_1V8] = 0x74,
129 [RES_VUSB_3V1] = 0x77,
130 [RES_VUSBCP] = 0x7a,
131 [RES_REGEN] = 0x7f,
132 [RES_NRES_PWRON] = 0x82,
133 [RES_CLKEN] = 0x85,
134 [RES_SYSEN] = 0x88,
135 [RES_HFCLKOUT] = 0x8b,
136 [RES_32KCLKOUT] = 0x8e,
137 [RES_RESET] = 0x91,
138 [RES_MAIN_REF] = 0x94,
139 };
140
141 /*
142 * Usable values for .remap_sleep and .remap_off
143 * Based on table "5.3.3 Resource Operating modes"
144 */
145 enum {
146 TWL_REMAP_OFF = 0,
147 TWL_REMAP_SLEEP = 8,
148 TWL_REMAP_ACTIVE = 9,
149 };
150
151 /*
152 * Macros to configure the PM register states for various resources.
153 * Note that we can make MSG_SINGULAR etc private to this driver once
154 * omap3 has been made DT only.
155 */
156 #define TWL_DFLT_DELAY 2 /* typically 2 32 KiHz cycles */
157 #define TWL_DEV_GRP_P123 (DEV_GRP_P1 | DEV_GRP_P2 | DEV_GRP_P3)
158 #define TWL_RESOURCE_SET(res, state) \
159 { MSG_SINGULAR(DEV_GRP_NULL, (res), (state)), TWL_DFLT_DELAY }
160 #define TWL_RESOURCE_ON(res) TWL_RESOURCE_SET(res, RES_STATE_ACTIVE)
161 #define TWL_RESOURCE_OFF(res) TWL_RESOURCE_SET(res, RES_STATE_OFF)
162 #define TWL_RESOURCE_RESET(res) TWL_RESOURCE_SET(res, RES_STATE_WRST)
163 /*
164 * It seems that type1 and type2 is just the resource init order
165 * number for the type1 and type2 group.
166 */
167 #define TWL_RESOURCE_SET_ACTIVE(res, state) \
168 { MSG_SINGULAR(DEV_GRP_NULL, (res), RES_STATE_ACTIVE), (state) }
169 #define TWL_RESOURCE_GROUP_RESET(group, type1, type2) \
170 { MSG_BROADCAST(DEV_GRP_NULL, (group), (type1), (type2), \
171 RES_STATE_WRST), TWL_DFLT_DELAY }
172 #define TWL_RESOURCE_GROUP_SLEEP(group, type, type2) \
173 { MSG_BROADCAST(DEV_GRP_NULL, (group), (type), (type2), \
174 RES_STATE_SLEEP), TWL_DFLT_DELAY }
175 #define TWL_RESOURCE_GROUP_ACTIVE(group, type, type2) \
176 { MSG_BROADCAST(DEV_GRP_NULL, (group), (type), (type2), \
177 RES_STATE_ACTIVE), TWL_DFLT_DELAY }
178 #define TWL_REMAP_SLEEP(res, devgrp, typ, typ2) \
179 { .resource = (res), .devgroup = (devgrp), \
180 .type = (typ), .type2 = (typ2), \
181 .remap_off = TWL_REMAP_OFF, \
182 .remap_sleep = TWL_REMAP_SLEEP, }
183 #define TWL_REMAP_OFF(res, devgrp, typ, typ2) \
184 { .resource = (res), .devgroup = (devgrp), \
185 .type = (typ), .type2 = (typ2), \
186 .remap_off = TWL_REMAP_OFF, .remap_sleep = TWL_REMAP_OFF, }
187
188 static int twl4030_write_script_byte(u8 address, u8 byte)
189 {
190 int err;
191
192 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, address, R_MEMORY_ADDRESS);
193 if (err)
194 goto out;
195 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, byte, R_MEMORY_DATA);
196 out:
197 return err;
198 }
199
200 static int twl4030_write_script_ins(u8 address, u16 pmb_message,
201 u8 delay, u8 next)
202 {
203 int err;
204
205 address *= 4;
206 err = twl4030_write_script_byte(address++, pmb_message >> 8);
207 if (err)
208 goto out;
209 err = twl4030_write_script_byte(address++, pmb_message & 0xff);
210 if (err)
211 goto out;
212 err = twl4030_write_script_byte(address++, delay);
213 if (err)
214 goto out;
215 err = twl4030_write_script_byte(address++, next);
216 out:
217 return err;
218 }
219
220 static int twl4030_write_script(u8 address, struct twl4030_ins *script,
221 int len)
222 {
223 int err = -EINVAL;
224
225 for (; len; len--, address++, script++) {
226 if (len == 1) {
227 err = twl4030_write_script_ins(address,
228 script->pmb_message,
229 script->delay,
230 END_OF_SCRIPT);
231 if (err)
232 break;
233 } else {
234 err = twl4030_write_script_ins(address,
235 script->pmb_message,
236 script->delay,
237 address + 1);
238 if (err)
239 break;
240 }
241 }
242 return err;
243 }
244
245 static int twl4030_config_wakeup3_sequence(u8 address)
246 {
247 int err;
248 u8 data;
249
250 /* Set SLEEP to ACTIVE SEQ address for P3 */
251 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, address, R_SEQ_ADD_S2A3);
252 if (err)
253 goto out;
254
255 /* P3 LVL_WAKEUP should be on LEVEL */
256 err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &data, R_P3_SW_EVENTS);
257 if (err)
258 goto out;
259 data |= PWR_LVL_WAKEUP;
260 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, data, R_P3_SW_EVENTS);
261 out:
262 if (err)
263 pr_err("TWL4030 wakeup sequence for P3 config error\n");
264 return err;
265 }
266
267 static int twl4030_config_wakeup12_sequence(u8 address)
268 {
269 int err = 0;
270 u8 data;
271
272 /* Set SLEEP to ACTIVE SEQ address for P1 and P2 */
273 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, address, R_SEQ_ADD_S2A12);
274 if (err)
275 goto out;
276
277 /* P1/P2 LVL_WAKEUP should be on LEVEL */
278 err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &data, R_P1_SW_EVENTS);
279 if (err)
280 goto out;
281
282 data |= PWR_LVL_WAKEUP;
283 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, data, R_P1_SW_EVENTS);
284 if (err)
285 goto out;
286
287 err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &data, R_P2_SW_EVENTS);
288 if (err)
289 goto out;
290
291 data |= PWR_LVL_WAKEUP;
292 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, data, R_P2_SW_EVENTS);
293 if (err)
294 goto out;
295
296 if (machine_is_omap_3430sdp() || machine_is_omap_ldp()) {
297 /* Disabling AC charger effect on sleep-active transitions */
298 err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &data,
299 R_CFG_P1_TRANSITION);
300 if (err)
301 goto out;
302 data &= ~(1<<1);
303 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, data,
304 R_CFG_P1_TRANSITION);
305 if (err)
306 goto out;
307 }
308
309 out:
310 if (err)
311 pr_err("TWL4030 wakeup sequence for P1 and P2" \
312 "config error\n");
313 return err;
314 }
315
316 static int twl4030_config_sleep_sequence(u8 address)
317 {
318 int err;
319
320 /* Set ACTIVE to SLEEP SEQ address in T2 memory*/
321 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, address, R_SEQ_ADD_A2S);
322
323 if (err)
324 pr_err("TWL4030 sleep sequence config error\n");
325
326 return err;
327 }
328
329 static int twl4030_config_warmreset_sequence(u8 address)
330 {
331 int err;
332 u8 rd_data;
333
334 /* Set WARM RESET SEQ address for P1 */
335 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, address, R_SEQ_ADD_WARM);
336 if (err)
337 goto out;
338
339 /* P1/P2/P3 enable WARMRESET */
340 err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &rd_data, R_P1_SW_EVENTS);
341 if (err)
342 goto out;
343
344 rd_data |= PWR_ENABLE_WARMRESET;
345 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, rd_data, R_P1_SW_EVENTS);
346 if (err)
347 goto out;
348
349 err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &rd_data, R_P2_SW_EVENTS);
350 if (err)
351 goto out;
352
353 rd_data |= PWR_ENABLE_WARMRESET;
354 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, rd_data, R_P2_SW_EVENTS);
355 if (err)
356 goto out;
357
358 err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &rd_data, R_P3_SW_EVENTS);
359 if (err)
360 goto out;
361
362 rd_data |= PWR_ENABLE_WARMRESET;
363 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, rd_data, R_P3_SW_EVENTS);
364 out:
365 if (err)
366 pr_err("TWL4030 warmreset seq config error\n");
367 return err;
368 }
369
370 static int twl4030_configure_resource(struct twl4030_resconfig *rconfig)
371 {
372 int rconfig_addr;
373 int err;
374 u8 type;
375 u8 grp;
376 u8 remap;
377
378 if (rconfig->resource > TOTAL_RESOURCES) {
379 pr_err("TWL4030 Resource %d does not exist\n",
380 rconfig->resource);
381 return -EINVAL;
382 }
383
384 rconfig_addr = res_config_addrs[rconfig->resource];
385
386 /* Set resource group */
387 err = twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &grp,
388 rconfig_addr + DEV_GRP_OFFSET);
389 if (err) {
390 pr_err("TWL4030 Resource %d group could not be read\n",
391 rconfig->resource);
392 return err;
393 }
394
395 if (rconfig->devgroup != TWL4030_RESCONFIG_UNDEF) {
396 grp &= ~DEV_GRP_MASK;
397 grp |= rconfig->devgroup << DEV_GRP_SHIFT;
398 err = twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER,
399 grp, rconfig_addr + DEV_GRP_OFFSET);
400 if (err < 0) {
401 pr_err("TWL4030 failed to program devgroup\n");
402 return err;
403 }
404 }
405
406 /* Set resource types */
407 err = twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &type,
408 rconfig_addr + TYPE_OFFSET);
409 if (err < 0) {
410 pr_err("TWL4030 Resource %d type could not be read\n",
411 rconfig->resource);
412 return err;
413 }
414
415 if (rconfig->type != TWL4030_RESCONFIG_UNDEF) {
416 type &= ~TYPE_MASK;
417 type |= rconfig->type << TYPE_SHIFT;
418 }
419
420 if (rconfig->type2 != TWL4030_RESCONFIG_UNDEF) {
421 type &= ~TYPE2_MASK;
422 type |= rconfig->type2 << TYPE2_SHIFT;
423 }
424
425 err = twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER,
426 type, rconfig_addr + TYPE_OFFSET);
427 if (err < 0) {
428 pr_err("TWL4030 failed to program resource type\n");
429 return err;
430 }
431
432 /* Set remap states */
433 err = twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &remap,
434 rconfig_addr + REMAP_OFFSET);
435 if (err < 0) {
436 pr_err("TWL4030 Resource %d remap could not be read\n",
437 rconfig->resource);
438 return err;
439 }
440
441 if (rconfig->remap_off != TWL4030_RESCONFIG_UNDEF) {
442 remap &= ~OFF_STATE_MASK;
443 remap |= rconfig->remap_off << OFF_STATE_SHIFT;
444 }
445
446 if (rconfig->remap_sleep != TWL4030_RESCONFIG_UNDEF) {
447 remap &= ~SLEEP_STATE_MASK;
448 remap |= rconfig->remap_sleep << SLEEP_STATE_SHIFT;
449 }
450
451 err = twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER,
452 remap,
453 rconfig_addr + REMAP_OFFSET);
454 if (err < 0) {
455 pr_err("TWL4030 failed to program remap\n");
456 return err;
457 }
458
459 return 0;
460 }
461
462 static int load_twl4030_script(struct twl4030_script *tscript,
463 u8 address)
464 {
465 int err;
466 static int order;
467
468 /* Make sure the script isn't going beyond last valid address (0x3f) */
469 if ((address + tscript->size) > END_OF_SCRIPT) {
470 pr_err("TWL4030 scripts too big error\n");
471 return -EINVAL;
472 }
473
474 err = twl4030_write_script(address, tscript->script, tscript->size);
475 if (err)
476 goto out;
477
478 if (tscript->flags & TWL4030_WRST_SCRIPT) {
479 err = twl4030_config_warmreset_sequence(address);
480 if (err)
481 goto out;
482 }
483 if (tscript->flags & TWL4030_WAKEUP12_SCRIPT) {
484 /* Reset any existing sleep script to avoid hangs on reboot */
485 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, END_OF_SCRIPT,
486 R_SEQ_ADD_A2S);
487 if (err)
488 goto out;
489
490 err = twl4030_config_wakeup12_sequence(address);
491 if (err)
492 goto out;
493 order = 1;
494 }
495 if (tscript->flags & TWL4030_WAKEUP3_SCRIPT) {
496 err = twl4030_config_wakeup3_sequence(address);
497 if (err)
498 goto out;
499 }
500 if (tscript->flags & TWL4030_SLEEP_SCRIPT) {
501 if (!order)
502 pr_warning("TWL4030: Bad order of scripts (sleep "\
503 "script before wakeup) Leads to boot"\
504 "failure on some boards\n");
505 err = twl4030_config_sleep_sequence(address);
506 }
507 out:
508 return err;
509 }
510
511 int twl4030_remove_script(u8 flags)
512 {
513 int err = 0;
514
515 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
516 TWL4030_PM_MASTER_PROTECT_KEY);
517 if (err) {
518 pr_err("twl4030: unable to unlock PROTECT_KEY\n");
519 return err;
520 }
521
522 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG2,
523 TWL4030_PM_MASTER_PROTECT_KEY);
524 if (err) {
525 pr_err("twl4030: unable to unlock PROTECT_KEY\n");
526 return err;
527 }
528
529 if (flags & TWL4030_WRST_SCRIPT) {
530 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, END_OF_SCRIPT,
531 R_SEQ_ADD_WARM);
532 if (err)
533 return err;
534 }
535 if (flags & TWL4030_WAKEUP12_SCRIPT) {
536 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, END_OF_SCRIPT,
537 R_SEQ_ADD_S2A12);
538 if (err)
539 return err;
540 }
541 if (flags & TWL4030_WAKEUP3_SCRIPT) {
542 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, END_OF_SCRIPT,
543 R_SEQ_ADD_S2A3);
544 if (err)
545 return err;
546 }
547 if (flags & TWL4030_SLEEP_SCRIPT) {
548 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, END_OF_SCRIPT,
549 R_SEQ_ADD_A2S);
550 if (err)
551 return err;
552 }
553
554 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0,
555 TWL4030_PM_MASTER_PROTECT_KEY);
556 if (err)
557 pr_err("TWL4030 Unable to relock registers\n");
558
559 return err;
560 }
561
562 static int
563 twl4030_power_configure_scripts(const struct twl4030_power_data *pdata)
564 {
565 int err;
566 int i;
567 u8 address = twl4030_start_script_address;
568
569 for (i = 0; i < pdata->num; i++) {
570 err = load_twl4030_script(pdata->scripts[i], address);
571 if (err)
572 return err;
573 address += pdata->scripts[i]->size;
574 }
575
576 return 0;
577 }
578
579 static void twl4030_patch_rconfig(struct twl4030_resconfig *common,
580 struct twl4030_resconfig *board)
581 {
582 while (common->resource) {
583 struct twl4030_resconfig *b = board;
584
585 while (b->resource) {
586 if (b->resource == common->resource) {
587 *common = *b;
588 break;
589 }
590 b++;
591 }
592 common++;
593 }
594 }
595
596 static int
597 twl4030_power_configure_resources(const struct twl4030_power_data *pdata)
598 {
599 struct twl4030_resconfig *resconfig = pdata->resource_config;
600 struct twl4030_resconfig *boardconf = pdata->board_config;
601 int err;
602
603 if (resconfig) {
604 if (boardconf)
605 twl4030_patch_rconfig(resconfig, boardconf);
606
607 while (resconfig->resource) {
608 err = twl4030_configure_resource(resconfig);
609 if (err)
610 return err;
611 resconfig++;
612 }
613 }
614
615 return 0;
616 }
617
618 static int twl4030_starton_mask_and_set(u8 bitmask, u8 bitvalues)
619 {
620 u8 regs[3] = { TWL4030_PM_MASTER_CFG_P1_TRANSITION,
621 TWL4030_PM_MASTER_CFG_P2_TRANSITION,
622 TWL4030_PM_MASTER_CFG_P3_TRANSITION, };
623 u8 val;
624 int i, err;
625
626 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
627 TWL4030_PM_MASTER_PROTECT_KEY);
628 if (err)
629 goto relock;
630 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
631 TWL4030_PM_MASTER_KEY_CFG2,
632 TWL4030_PM_MASTER_PROTECT_KEY);
633 if (err)
634 goto relock;
635
636 for (i = 0; i < sizeof(regs); i++) {
637 err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER,
638 &val, regs[i]);
639 if (err)
640 break;
641 val = (~bitmask & val) | (bitmask & bitvalues);
642 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
643 val, regs[i]);
644 if (err)
645 break;
646 }
647
648 if (err)
649 pr_err("TWL4030 Register access failed: %i\n", err);
650
651 relock:
652 return twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0,
653 TWL4030_PM_MASTER_PROTECT_KEY);
654 }
655
656 /*
657 * In master mode, start the power off sequence.
658 * After a successful execution, TWL shuts down the power to the SoC
659 * and all peripherals connected to it.
660 */
661 void twl4030_power_off(void)
662 {
663 int err;
664
665 /* Disable start on charger or VBUS as it can break poweroff */
666 err = twl4030_starton_mask_and_set(STARTON_VBUS | STARTON_CHG, 0);
667 if (err)
668 pr_err("TWL4030 Unable to configure start-up\n");
669
670 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, PWR_DEVOFF,
671 TWL4030_PM_MASTER_P1_SW_EVENTS);
672 if (err)
673 pr_err("TWL4030 Unable to power off\n");
674 }
675
676 static bool twl4030_power_use_poweroff(const struct twl4030_power_data *pdata,
677 struct device_node *node)
678 {
679 if (pdata && pdata->use_poweroff)
680 return true;
681
682 if (of_property_read_bool(node, "ti,system-power-controller"))
683 return true;
684
685 if (of_property_read_bool(node, "ti,use_poweroff"))
686 return true;
687
688 return false;
689 }
690
691 #ifdef CONFIG_OF
692
693 /* Generic warm reset configuration for omap3 */
694
695 static struct twl4030_ins omap3_wrst_seq[] = {
696 TWL_RESOURCE_OFF(RES_NRES_PWRON),
697 TWL_RESOURCE_OFF(RES_RESET),
698 TWL_RESOURCE_RESET(RES_MAIN_REF),
699 TWL_RESOURCE_GROUP_RESET(RES_GRP_ALL, RES_TYPE_R0, RES_TYPE2_R2),
700 TWL_RESOURCE_RESET(RES_VUSB_3V1),
701 TWL_RESOURCE_GROUP_RESET(RES_GRP_ALL, RES_TYPE_R0, RES_TYPE2_R1),
702 TWL_RESOURCE_GROUP_RESET(RES_GRP_RC, RES_TYPE_ALL, RES_TYPE2_R0),
703 TWL_RESOURCE_ON(RES_RESET),
704 TWL_RESOURCE_ON(RES_NRES_PWRON),
705 };
706
707 static struct twl4030_script omap3_wrst_script = {
708 .script = omap3_wrst_seq,
709 .size = ARRAY_SIZE(omap3_wrst_seq),
710 .flags = TWL4030_WRST_SCRIPT,
711 };
712
713 static struct twl4030_script *omap3_reset_scripts[] = {
714 &omap3_wrst_script,
715 };
716
717 static struct twl4030_resconfig omap3_rconfig[] = {
718 TWL_REMAP_SLEEP(RES_HFCLKOUT, DEV_GRP_P3, -1, -1),
719 TWL_REMAP_SLEEP(RES_VDD1, DEV_GRP_P1, -1, -1),
720 TWL_REMAP_SLEEP(RES_VDD2, DEV_GRP_P1, -1, -1),
721 { 0, 0 },
722 };
723
724 static struct twl4030_power_data omap3_reset = {
725 .scripts = omap3_reset_scripts,
726 .num = ARRAY_SIZE(omap3_reset_scripts),
727 .resource_config = omap3_rconfig,
728 };
729
730 /* Recommended generic default idle configuration for off-idle */
731
732 /* Broadcast message to put res to sleep */
733 static struct twl4030_ins omap3_idle_sleep_on_seq[] = {
734 TWL_RESOURCE_GROUP_SLEEP(RES_GRP_ALL, RES_TYPE_ALL, 0),
735 };
736
737 static struct twl4030_script omap3_idle_sleep_on_script = {
738 .script = omap3_idle_sleep_on_seq,
739 .size = ARRAY_SIZE(omap3_idle_sleep_on_seq),
740 .flags = TWL4030_SLEEP_SCRIPT,
741 };
742
743 /* Broadcast message to put res to active */
744 static struct twl4030_ins omap3_idle_wakeup_p12_seq[] = {
745 TWL_RESOURCE_GROUP_ACTIVE(RES_GRP_ALL, RES_TYPE_ALL, 0),
746 };
747
748 static struct twl4030_script omap3_idle_wakeup_p12_script = {
749 .script = omap3_idle_wakeup_p12_seq,
750 .size = ARRAY_SIZE(omap3_idle_wakeup_p12_seq),
751 .flags = TWL4030_WAKEUP12_SCRIPT,
752 };
753
754 /* Broadcast message to put res to active */
755 static struct twl4030_ins omap3_idle_wakeup_p3_seq[] = {
756 TWL_RESOURCE_SET_ACTIVE(RES_CLKEN, 0x37),
757 TWL_RESOURCE_GROUP_ACTIVE(RES_GRP_ALL, RES_TYPE_ALL, 0),
758 };
759
760 static struct twl4030_script omap3_idle_wakeup_p3_script = {
761 .script = omap3_idle_wakeup_p3_seq,
762 .size = ARRAY_SIZE(omap3_idle_wakeup_p3_seq),
763 .flags = TWL4030_WAKEUP3_SCRIPT,
764 };
765
766 static struct twl4030_script *omap3_idle_scripts[] = {
767 &omap3_idle_wakeup_p12_script,
768 &omap3_idle_wakeup_p3_script,
769 &omap3_wrst_script,
770 &omap3_idle_sleep_on_script,
771 };
772
773 /*
774 * Recommended configuration based on "Recommended Sleep
775 * Sequences for the Zoom Platform":
776 * http://omappedia.com/wiki/File:Recommended_Sleep_Sequences_Zoom.pdf
777 * Note that the type1 and type2 seem to be just the init order number
778 * for type1 and type2 groups as specified in the document mentioned
779 * above.
780 */
781 static struct twl4030_resconfig omap3_idle_rconfig[] = {
782 TWL_REMAP_SLEEP(RES_VAUX1, TWL4030_RESCONFIG_UNDEF, 0, 0),
783 TWL_REMAP_SLEEP(RES_VAUX2, TWL4030_RESCONFIG_UNDEF, 0, 0),
784 TWL_REMAP_SLEEP(RES_VAUX3, TWL4030_RESCONFIG_UNDEF, 0, 0),
785 TWL_REMAP_SLEEP(RES_VAUX4, TWL4030_RESCONFIG_UNDEF, 0, 0),
786 TWL_REMAP_SLEEP(RES_VMMC1, TWL4030_RESCONFIG_UNDEF, 0, 0),
787 TWL_REMAP_SLEEP(RES_VMMC2, TWL4030_RESCONFIG_UNDEF, 0, 0),
788 TWL_REMAP_OFF(RES_VPLL1, DEV_GRP_P1, 3, 1),
789 TWL_REMAP_SLEEP(RES_VPLL2, DEV_GRP_P1, 0, 0),
790 TWL_REMAP_SLEEP(RES_VSIM, TWL4030_RESCONFIG_UNDEF, 0, 0),
791 TWL_REMAP_SLEEP(RES_VDAC, TWL4030_RESCONFIG_UNDEF, 0, 0),
792 TWL_REMAP_SLEEP(RES_VINTANA1, TWL_DEV_GRP_P123, 1, 2),
793 TWL_REMAP_SLEEP(RES_VINTANA2, TWL_DEV_GRP_P123, 0, 2),
794 TWL_REMAP_SLEEP(RES_VINTDIG, TWL_DEV_GRP_P123, 1, 2),
795 TWL_REMAP_SLEEP(RES_VIO, TWL_DEV_GRP_P123, 2, 2),
796 TWL_REMAP_OFF(RES_VDD1, DEV_GRP_P1, 4, 1),
797 TWL_REMAP_OFF(RES_VDD2, DEV_GRP_P1, 3, 1),
798 TWL_REMAP_SLEEP(RES_VUSB_1V5, TWL4030_RESCONFIG_UNDEF, 0, 0),
799 TWL_REMAP_SLEEP(RES_VUSB_1V8, TWL4030_RESCONFIG_UNDEF, 0, 0),
800 TWL_REMAP_SLEEP(RES_VUSB_3V1, TWL_DEV_GRP_P123, 0, 0),
801 /* Resource #20 USB charge pump skipped */
802 TWL_REMAP_SLEEP(RES_REGEN, TWL_DEV_GRP_P123, 2, 1),
803 TWL_REMAP_SLEEP(RES_NRES_PWRON, TWL_DEV_GRP_P123, 0, 1),
804 TWL_REMAP_SLEEP(RES_CLKEN, TWL_DEV_GRP_P123, 3, 2),
805 TWL_REMAP_SLEEP(RES_SYSEN, TWL_DEV_GRP_P123, 6, 1),
806 TWL_REMAP_SLEEP(RES_HFCLKOUT, DEV_GRP_P3, 0, 2),
807 TWL_REMAP_SLEEP(RES_32KCLKOUT, TWL_DEV_GRP_P123, 0, 0),
808 TWL_REMAP_SLEEP(RES_RESET, TWL_DEV_GRP_P123, 6, 0),
809 TWL_REMAP_SLEEP(RES_MAIN_REF, TWL_DEV_GRP_P123, 0, 0),
810 { /* Terminator */ },
811 };
812
813 static struct twl4030_power_data omap3_idle = {
814 .scripts = omap3_idle_scripts,
815 .num = ARRAY_SIZE(omap3_idle_scripts),
816 .resource_config = omap3_idle_rconfig,
817 };
818
819 /* Disable 32 KiHz oscillator during idle */
820 static struct twl4030_resconfig osc_off_rconfig[] = {
821 TWL_REMAP_OFF(RES_CLKEN, DEV_GRP_P1 | DEV_GRP_P3, 3, 2),
822 { /* Terminator */ },
823 };
824
825 static struct twl4030_power_data osc_off_idle = {
826 .scripts = omap3_idle_scripts,
827 .num = ARRAY_SIZE(omap3_idle_scripts),
828 .resource_config = omap3_idle_rconfig,
829 .board_config = osc_off_rconfig,
830 };
831
832 static struct of_device_id twl4030_power_of_match[] = {
833 {
834 .compatible = "ti,twl4030-power",
835 },
836 {
837 .compatible = "ti,twl4030-power-reset",
838 .data = &omap3_reset,
839 },
840 {
841 .compatible = "ti,twl4030-power-idle",
842 .data = &omap3_idle,
843 },
844 {
845 .compatible = "ti,twl4030-power-idle-osc-off",
846 .data = &osc_off_idle,
847 },
848 { },
849 };
850 MODULE_DEVICE_TABLE(of, twl4030_power_of_match);
851 #endif /* CONFIG_OF */
852
853 static int twl4030_power_probe(struct platform_device *pdev)
854 {
855 const struct twl4030_power_data *pdata = dev_get_platdata(&pdev->dev);
856 struct device_node *node = pdev->dev.of_node;
857 const struct of_device_id *match;
858 int err = 0;
859 int err2 = 0;
860 u8 val;
861
862 if (!pdata && !node) {
863 dev_err(&pdev->dev, "Platform data is missing\n");
864 return -EINVAL;
865 }
866
867 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
868 TWL4030_PM_MASTER_PROTECT_KEY);
869 err |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
870 TWL4030_PM_MASTER_KEY_CFG2,
871 TWL4030_PM_MASTER_PROTECT_KEY);
872
873 if (err) {
874 pr_err("TWL4030 Unable to unlock registers\n");
875 return err;
876 }
877
878 match = of_match_device(of_match_ptr(twl4030_power_of_match),
879 &pdev->dev);
880 if (match && match->data)
881 pdata = match->data;
882
883 if (pdata) {
884 err = twl4030_power_configure_scripts(pdata);
885 if (err) {
886 pr_err("TWL4030 failed to load scripts\n");
887 goto relock;
888 }
889 err = twl4030_power_configure_resources(pdata);
890 if (err) {
891 pr_err("TWL4030 failed to configure resource\n");
892 goto relock;
893 }
894 }
895
896 /* Board has to be wired properly to use this feature */
897 if (twl4030_power_use_poweroff(pdata, node) && !pm_power_off) {
898 /* Default for SEQ_OFFSYNC is set, lets ensure this */
899 err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &val,
900 TWL4030_PM_MASTER_CFG_P123_TRANSITION);
901 if (err) {
902 pr_warning("TWL4030 Unable to read registers\n");
903
904 } else if (!(val & SEQ_OFFSYNC)) {
905 val |= SEQ_OFFSYNC;
906 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, val,
907 TWL4030_PM_MASTER_CFG_P123_TRANSITION);
908 if (err) {
909 pr_err("TWL4030 Unable to setup SEQ_OFFSYNC\n");
910 goto relock;
911 }
912 }
913
914 pm_power_off = twl4030_power_off;
915 }
916
917 relock:
918 err2 = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0,
919 TWL4030_PM_MASTER_PROTECT_KEY);
920 if (err2) {
921 pr_err("TWL4030 Unable to relock registers\n");
922 return err2;
923 }
924
925 return err;
926 }
927
928 static int twl4030_power_remove(struct platform_device *pdev)
929 {
930 return 0;
931 }
932
933 static struct platform_driver twl4030_power_driver = {
934 .driver = {
935 .name = "twl4030_power",
936 .of_match_table = of_match_ptr(twl4030_power_of_match),
937 },
938 .probe = twl4030_power_probe,
939 .remove = twl4030_power_remove,
940 };
941
942 module_platform_driver(twl4030_power_driver);
943
944 MODULE_AUTHOR("Nokia Corporation");
945 MODULE_AUTHOR("Texas Instruments, Inc.");
946 MODULE_DESCRIPTION("Power management for TWL4030");
947 MODULE_LICENSE("GPL");
948 MODULE_ALIAS("platform:twl4030_power");
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