1 /*
2  *
3  * Handle TWL4030 Power initialization
4  *
5  * Copyright (C) 2008 Nokia Corporation
6  * Copyright (C) 2006 Texas Instruments, Inc
7  *
8  * Written by 	Kalle Jokiniemi
9  *		Peter De Schrijver <peter.de-schrijver@nokia.com>
10  * Several fixes by Amit Kucheria <amit.kucheria@verdurent.com>
11  *
12  * This file is subject to the terms and conditions of the GNU General
13  * Public License. See the file "COPYING" in the main directory of this
14  * archive for more details.
15  *
16  * This program is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19  * GNU General Public License for more details.
20  *
21  * You should have received a copy of the GNU General Public License
22  * along with this program; if not, write to the Free Software
23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
24  */
25 
26 #include <linux/module.h>
27 #include <linux/pm.h>
28 #include <linux/mfd/twl.h>
29 #include <linux/platform_device.h>
30 #include <linux/of.h>
31 #include <linux/of_device.h>
32 
33 #include <asm/mach-types.h>
34 
35 static u8 twl4030_start_script_address = 0x2b;
36 
37 /* Register bits for P1, P2 and P3_SW_EVENTS */
38 #define PWR_STOPON_PRWON	BIT(6)
39 #define PWR_STOPON_SYSEN	BIT(5)
40 #define PWR_ENABLE_WARMRESET	BIT(4)
41 #define PWR_LVL_WAKEUP		BIT(3)
42 #define PWR_DEVACT		BIT(2)
43 #define PWR_DEVSLP		BIT(1)
44 #define PWR_DEVOFF		BIT(0)
45 
46 /* Register bits for CFG_P1_TRANSITION (also for P2 and P3) */
47 #define STARTON_SWBUG		BIT(7)	/* Start on watchdog */
48 #define STARTON_VBUS		BIT(5)	/* Start on VBUS */
49 #define STARTON_VBAT		BIT(4)	/* Start on battery insert */
50 #define STARTON_RTC		BIT(3)	/* Start on RTC */
51 #define STARTON_USB		BIT(2)	/* Start on USB host */
52 #define STARTON_CHG		BIT(1)	/* Start on charger */
53 #define STARTON_PWON		BIT(0)	/* Start on PWRON button */
54 
55 #define SEQ_OFFSYNC		(1 << 0)
56 
57 #define PHY_TO_OFF_PM_MASTER(p)		(p - 0x36)
58 #define PHY_TO_OFF_PM_RECEIVER(p)	(p - 0x5b)
59 
60 /* resource - hfclk */
61 #define R_HFCLKOUT_DEV_GRP 	PHY_TO_OFF_PM_RECEIVER(0xe6)
62 
63 /* PM events */
64 #define R_P1_SW_EVENTS		PHY_TO_OFF_PM_MASTER(0x46)
65 #define R_P2_SW_EVENTS		PHY_TO_OFF_PM_MASTER(0x47)
66 #define R_P3_SW_EVENTS		PHY_TO_OFF_PM_MASTER(0x48)
67 #define R_CFG_P1_TRANSITION	PHY_TO_OFF_PM_MASTER(0x36)
68 #define R_CFG_P2_TRANSITION	PHY_TO_OFF_PM_MASTER(0x37)
69 #define R_CFG_P3_TRANSITION	PHY_TO_OFF_PM_MASTER(0x38)
70 
71 #define END_OF_SCRIPT		0x3f
72 
73 #define R_SEQ_ADD_A2S		PHY_TO_OFF_PM_MASTER(0x55)
74 #define R_SEQ_ADD_S2A12		PHY_TO_OFF_PM_MASTER(0x56)
75 #define	R_SEQ_ADD_S2A3		PHY_TO_OFF_PM_MASTER(0x57)
76 #define	R_SEQ_ADD_WARM		PHY_TO_OFF_PM_MASTER(0x58)
77 #define R_MEMORY_ADDRESS	PHY_TO_OFF_PM_MASTER(0x59)
78 #define R_MEMORY_DATA		PHY_TO_OFF_PM_MASTER(0x5a)
79 
80 /* resource configuration registers
81    <RESOURCE>_DEV_GRP   at address 'n+0'
82    <RESOURCE>_TYPE      at address 'n+1'
83    <RESOURCE>_REMAP     at address 'n+2'
84    <RESOURCE>_DEDICATED at address 'n+3'
85 */
86 #define DEV_GRP_OFFSET		0
87 #define TYPE_OFFSET		1
88 #define REMAP_OFFSET		2
89 #define DEDICATED_OFFSET	3
90 
91 /* Bit positions in the registers */
92 
93 /* <RESOURCE>_DEV_GRP */
94 #define DEV_GRP_SHIFT		5
95 #define DEV_GRP_MASK		(7 << DEV_GRP_SHIFT)
96 
97 /* <RESOURCE>_TYPE */
98 #define TYPE_SHIFT		0
99 #define TYPE_MASK		(7 << TYPE_SHIFT)
100 #define TYPE2_SHIFT		3
101 #define TYPE2_MASK		(3 << TYPE2_SHIFT)
102 
103 /* <RESOURCE>_REMAP */
104 #define SLEEP_STATE_SHIFT	0
105 #define SLEEP_STATE_MASK	(0xf << SLEEP_STATE_SHIFT)
106 #define OFF_STATE_SHIFT		4
107 #define OFF_STATE_MASK		(0xf << OFF_STATE_SHIFT)
108 
109 static u8 res_config_addrs[] = {
110 	[RES_VAUX1]	= 0x17,
111 	[RES_VAUX2]	= 0x1b,
112 	[RES_VAUX3]	= 0x1f,
113 	[RES_VAUX4]	= 0x23,
114 	[RES_VMMC1]	= 0x27,
115 	[RES_VMMC2]	= 0x2b,
116 	[RES_VPLL1]	= 0x2f,
117 	[RES_VPLL2]	= 0x33,
118 	[RES_VSIM]	= 0x37,
119 	[RES_VDAC]	= 0x3b,
120 	[RES_VINTANA1]	= 0x3f,
121 	[RES_VINTANA2]	= 0x43,
122 	[RES_VINTDIG]	= 0x47,
123 	[RES_VIO]	= 0x4b,
124 	[RES_VDD1]	= 0x55,
125 	[RES_VDD2]	= 0x63,
126 	[RES_VUSB_1V5]	= 0x71,
127 	[RES_VUSB_1V8]	= 0x74,
128 	[RES_VUSB_3V1]	= 0x77,
129 	[RES_VUSBCP]	= 0x7a,
130 	[RES_REGEN]	= 0x7f,
131 	[RES_NRES_PWRON] = 0x82,
132 	[RES_CLKEN]	= 0x85,
133 	[RES_SYSEN]	= 0x88,
134 	[RES_HFCLKOUT]	= 0x8b,
135 	[RES_32KCLKOUT]	= 0x8e,
136 	[RES_RESET]	= 0x91,
137 	[RES_MAIN_REF]	= 0x94,
138 };
139 
140 /*
141  * Usable values for .remap_sleep and .remap_off
142  * Based on table "5.3.3 Resource Operating modes"
143  */
144 enum {
145 	TWL_REMAP_OFF = 0,
146 	TWL_REMAP_SLEEP = 8,
147 	TWL_REMAP_ACTIVE = 9,
148 };
149 
150 /*
151  * Macros to configure the PM register states for various resources.
152  * Note that we can make MSG_SINGULAR etc private to this driver once
153  * omap3 has been made DT only.
154  */
155 #define TWL_DFLT_DELAY		2	/* typically 2 32 KiHz cycles */
156 #define TWL_DEV_GRP_P123	(DEV_GRP_P1 | DEV_GRP_P2 | DEV_GRP_P3)
157 #define TWL_RESOURCE_SET(res, state)					\
158 	{ MSG_SINGULAR(DEV_GRP_NULL, (res), (state)), TWL_DFLT_DELAY }
159 #define TWL_RESOURCE_ON(res)	TWL_RESOURCE_SET(res, RES_STATE_ACTIVE)
160 #define TWL_RESOURCE_OFF(res)	TWL_RESOURCE_SET(res, RES_STATE_OFF)
161 #define TWL_RESOURCE_RESET(res)	TWL_RESOURCE_SET(res, RES_STATE_WRST)
162 /*
163  * It seems that type1 and type2 is just the resource init order
164  * number for the type1 and type2 group.
165  */
166 #define TWL_RESOURCE_SET_ACTIVE(res, state)			       	\
167 	{ MSG_SINGULAR(DEV_GRP_NULL, (res), RES_STATE_ACTIVE), (state) }
168 #define TWL_RESOURCE_GROUP_RESET(group, type1, type2)			\
169 	{ MSG_BROADCAST(DEV_GRP_NULL, (group), (type1), (type2),	\
170 		RES_STATE_WRST), TWL_DFLT_DELAY }
171 #define TWL_RESOURCE_GROUP_SLEEP(group, type, type2)			\
172 	{ MSG_BROADCAST(DEV_GRP_NULL, (group), (type), (type2),		\
173 		RES_STATE_SLEEP), TWL_DFLT_DELAY }
174 #define TWL_RESOURCE_GROUP_ACTIVE(group, type, type2)			\
175 	{ MSG_BROADCAST(DEV_GRP_NULL, (group), (type), (type2),		\
176 		RES_STATE_ACTIVE), TWL_DFLT_DELAY }
177 #define TWL_REMAP_SLEEP(res, devgrp, typ, typ2)				\
178 	{ .resource = (res), .devgroup = (devgrp),			\
179 	  .type = (typ), .type2 = (typ2),				\
180 	  .remap_off = TWL_REMAP_OFF,					\
181 	  .remap_sleep = TWL_REMAP_SLEEP, }
182 #define TWL_REMAP_OFF(res, devgrp, typ, typ2)				\
183 	{ .resource = (res), .devgroup = (devgrp),			\
184 	  .type = (typ), .type2 = (typ2),				\
185 	  .remap_off = TWL_REMAP_OFF, .remap_sleep = TWL_REMAP_OFF, }
186 
twl4030_write_script_byte(u8 address,u8 byte)187 static int twl4030_write_script_byte(u8 address, u8 byte)
188 {
189 	int err;
190 
191 	err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, address, R_MEMORY_ADDRESS);
192 	if (err)
193 		goto out;
194 	err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, byte, R_MEMORY_DATA);
195 out:
196 	return err;
197 }
198 
twl4030_write_script_ins(u8 address,u16 pmb_message,u8 delay,u8 next)199 static int twl4030_write_script_ins(u8 address, u16 pmb_message,
200 					   u8 delay, u8 next)
201 {
202 	int err;
203 
204 	address *= 4;
205 	err = twl4030_write_script_byte(address++, pmb_message >> 8);
206 	if (err)
207 		goto out;
208 	err = twl4030_write_script_byte(address++, pmb_message & 0xff);
209 	if (err)
210 		goto out;
211 	err = twl4030_write_script_byte(address++, delay);
212 	if (err)
213 		goto out;
214 	err = twl4030_write_script_byte(address++, next);
215 out:
216 	return err;
217 }
218 
twl4030_write_script(u8 address,struct twl4030_ins * script,int len)219 static int twl4030_write_script(u8 address, struct twl4030_ins *script,
220 				       int len)
221 {
222 	int err = -EINVAL;
223 
224 	for (; len; len--, address++, script++) {
225 		if (len == 1) {
226 			err = twl4030_write_script_ins(address,
227 						script->pmb_message,
228 						script->delay,
229 						END_OF_SCRIPT);
230 			if (err)
231 				break;
232 		} else {
233 			err = twl4030_write_script_ins(address,
234 						script->pmb_message,
235 						script->delay,
236 						address + 1);
237 			if (err)
238 				break;
239 		}
240 	}
241 	return err;
242 }
243 
twl4030_config_wakeup3_sequence(u8 address)244 static int twl4030_config_wakeup3_sequence(u8 address)
245 {
246 	int err;
247 	u8 data;
248 
249 	/* Set SLEEP to ACTIVE SEQ address for P3 */
250 	err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, address, R_SEQ_ADD_S2A3);
251 	if (err)
252 		goto out;
253 
254 	/* P3 LVL_WAKEUP should be on LEVEL */
255 	err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &data, R_P3_SW_EVENTS);
256 	if (err)
257 		goto out;
258 	data |= PWR_LVL_WAKEUP;
259 	err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, data, R_P3_SW_EVENTS);
260 out:
261 	if (err)
262 		pr_err("TWL4030 wakeup sequence for P3 config error\n");
263 	return err;
264 }
265 
266 static int
twl4030_config_wakeup12_sequence(const struct twl4030_power_data * pdata,u8 address)267 twl4030_config_wakeup12_sequence(const struct twl4030_power_data *pdata,
268 				 u8 address)
269 {
270 	int err = 0;
271 	u8 data;
272 
273 	/* Set SLEEP to ACTIVE SEQ address for P1 and P2 */
274 	err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, address, R_SEQ_ADD_S2A12);
275 	if (err)
276 		goto out;
277 
278 	/* P1/P2 LVL_WAKEUP should be on LEVEL */
279 	err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &data, R_P1_SW_EVENTS);
280 	if (err)
281 		goto out;
282 
283 	data |= PWR_LVL_WAKEUP;
284 	err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, data, R_P1_SW_EVENTS);
285 	if (err)
286 		goto out;
287 
288 	err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &data, R_P2_SW_EVENTS);
289 	if (err)
290 		goto out;
291 
292 	data |= PWR_LVL_WAKEUP;
293 	err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, data, R_P2_SW_EVENTS);
294 	if (err)
295 		goto out;
296 
297 	if (pdata->ac_charger_quirk || machine_is_omap_3430sdp() ||
298 	    machine_is_omap_ldp()) {
299 		/* Disabling AC charger effect on sleep-active transitions */
300 		err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &data,
301 				      R_CFG_P1_TRANSITION);
302 		if (err)
303 			goto out;
304 		data &= ~STARTON_CHG;
305 		err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, data,
306 				       R_CFG_P1_TRANSITION);
307 		if (err)
308 			goto out;
309 	}
310 
311 out:
312 	if (err)
313 		pr_err("TWL4030 wakeup sequence for P1 and P2" \
314 			"config error\n");
315 	return err;
316 }
317 
twl4030_config_sleep_sequence(u8 address)318 static int twl4030_config_sleep_sequence(u8 address)
319 {
320 	int err;
321 
322 	/* Set ACTIVE to SLEEP SEQ address in T2 memory*/
323 	err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, address, R_SEQ_ADD_A2S);
324 
325 	if (err)
326 		pr_err("TWL4030 sleep sequence config error\n");
327 
328 	return err;
329 }
330 
twl4030_config_warmreset_sequence(u8 address)331 static int twl4030_config_warmreset_sequence(u8 address)
332 {
333 	int err;
334 	u8 rd_data;
335 
336 	/* Set WARM RESET SEQ address for P1 */
337 	err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, address, R_SEQ_ADD_WARM);
338 	if (err)
339 		goto out;
340 
341 	/* P1/P2/P3 enable WARMRESET */
342 	err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &rd_data, R_P1_SW_EVENTS);
343 	if (err)
344 		goto out;
345 
346 	rd_data |= PWR_ENABLE_WARMRESET;
347 	err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, rd_data, R_P1_SW_EVENTS);
348 	if (err)
349 		goto out;
350 
351 	err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &rd_data, R_P2_SW_EVENTS);
352 	if (err)
353 		goto out;
354 
355 	rd_data |= PWR_ENABLE_WARMRESET;
356 	err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, rd_data, R_P2_SW_EVENTS);
357 	if (err)
358 		goto out;
359 
360 	err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &rd_data, R_P3_SW_EVENTS);
361 	if (err)
362 		goto out;
363 
364 	rd_data |= PWR_ENABLE_WARMRESET;
365 	err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, rd_data, R_P3_SW_EVENTS);
366 out:
367 	if (err)
368 		pr_err("TWL4030 warmreset seq config error\n");
369 	return err;
370 }
371 
twl4030_configure_resource(struct twl4030_resconfig * rconfig)372 static int twl4030_configure_resource(struct twl4030_resconfig *rconfig)
373 {
374 	int rconfig_addr;
375 	int err;
376 	u8 type;
377 	u8 grp;
378 	u8 remap;
379 
380 	if (rconfig->resource > TOTAL_RESOURCES) {
381 		pr_err("TWL4030 Resource %d does not exist\n",
382 			rconfig->resource);
383 		return -EINVAL;
384 	}
385 
386 	rconfig_addr = res_config_addrs[rconfig->resource];
387 
388 	/* Set resource group */
389 	err = twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &grp,
390 			      rconfig_addr + DEV_GRP_OFFSET);
391 	if (err) {
392 		pr_err("TWL4030 Resource %d group could not be read\n",
393 			rconfig->resource);
394 		return err;
395 	}
396 
397 	if (rconfig->devgroup != TWL4030_RESCONFIG_UNDEF) {
398 		grp &= ~DEV_GRP_MASK;
399 		grp |= rconfig->devgroup << DEV_GRP_SHIFT;
400 		err = twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER,
401 				       grp, rconfig_addr + DEV_GRP_OFFSET);
402 		if (err < 0) {
403 			pr_err("TWL4030 failed to program devgroup\n");
404 			return err;
405 		}
406 	}
407 
408 	/* Set resource types */
409 	err = twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &type,
410 				rconfig_addr + TYPE_OFFSET);
411 	if (err < 0) {
412 		pr_err("TWL4030 Resource %d type could not be read\n",
413 			rconfig->resource);
414 		return err;
415 	}
416 
417 	if (rconfig->type != TWL4030_RESCONFIG_UNDEF) {
418 		type &= ~TYPE_MASK;
419 		type |= rconfig->type << TYPE_SHIFT;
420 	}
421 
422 	if (rconfig->type2 != TWL4030_RESCONFIG_UNDEF) {
423 		type &= ~TYPE2_MASK;
424 		type |= rconfig->type2 << TYPE2_SHIFT;
425 	}
426 
427 	err = twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER,
428 				type, rconfig_addr + TYPE_OFFSET);
429 	if (err < 0) {
430 		pr_err("TWL4030 failed to program resource type\n");
431 		return err;
432 	}
433 
434 	/* Set remap states */
435 	err = twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &remap,
436 			      rconfig_addr + REMAP_OFFSET);
437 	if (err < 0) {
438 		pr_err("TWL4030 Resource %d remap could not be read\n",
439 			rconfig->resource);
440 		return err;
441 	}
442 
443 	if (rconfig->remap_off != TWL4030_RESCONFIG_UNDEF) {
444 		remap &= ~OFF_STATE_MASK;
445 		remap |= rconfig->remap_off << OFF_STATE_SHIFT;
446 	}
447 
448 	if (rconfig->remap_sleep != TWL4030_RESCONFIG_UNDEF) {
449 		remap &= ~SLEEP_STATE_MASK;
450 		remap |= rconfig->remap_sleep << SLEEP_STATE_SHIFT;
451 	}
452 
453 	err = twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER,
454 			       remap,
455 			       rconfig_addr + REMAP_OFFSET);
456 	if (err < 0) {
457 		pr_err("TWL4030 failed to program remap\n");
458 		return err;
459 	}
460 
461 	return 0;
462 }
463 
load_twl4030_script(const struct twl4030_power_data * pdata,struct twl4030_script * tscript,u8 address)464 static int load_twl4030_script(const struct twl4030_power_data *pdata,
465 			       struct twl4030_script *tscript,
466 			       u8 address)
467 {
468 	int err;
469 	static int order;
470 
471 	/* Make sure the script isn't going beyond last valid address (0x3f) */
472 	if ((address + tscript->size) > END_OF_SCRIPT) {
473 		pr_err("TWL4030 scripts too big error\n");
474 		return -EINVAL;
475 	}
476 
477 	err = twl4030_write_script(address, tscript->script, tscript->size);
478 	if (err)
479 		goto out;
480 
481 	if (tscript->flags & TWL4030_WRST_SCRIPT) {
482 		err = twl4030_config_warmreset_sequence(address);
483 		if (err)
484 			goto out;
485 	}
486 	if (tscript->flags & TWL4030_WAKEUP12_SCRIPT) {
487 		/* Reset any existing sleep script to avoid hangs on reboot */
488 		err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, END_OF_SCRIPT,
489 				       R_SEQ_ADD_A2S);
490 		if (err)
491 			goto out;
492 
493 		err = twl4030_config_wakeup12_sequence(pdata, address);
494 		if (err)
495 			goto out;
496 		order = 1;
497 	}
498 	if (tscript->flags & TWL4030_WAKEUP3_SCRIPT) {
499 		err = twl4030_config_wakeup3_sequence(address);
500 		if (err)
501 			goto out;
502 	}
503 	if (tscript->flags & TWL4030_SLEEP_SCRIPT) {
504 		if (!order)
505 			pr_warn("TWL4030: Bad order of scripts (sleep script before wakeup) Leads to boot failure on some boards\n");
506 		err = twl4030_config_sleep_sequence(address);
507 	}
508 out:
509 	return err;
510 }
511 
twl4030_remove_script(u8 flags)512 int twl4030_remove_script(u8 flags)
513 {
514 	int err = 0;
515 
516 	err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
517 			       TWL4030_PM_MASTER_PROTECT_KEY);
518 	if (err) {
519 		pr_err("twl4030: unable to unlock PROTECT_KEY\n");
520 		return err;
521 	}
522 
523 	err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG2,
524 			       TWL4030_PM_MASTER_PROTECT_KEY);
525 	if (err) {
526 		pr_err("twl4030: unable to unlock PROTECT_KEY\n");
527 		return err;
528 	}
529 
530 	if (flags & TWL4030_WRST_SCRIPT) {
531 		err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, END_OF_SCRIPT,
532 				       R_SEQ_ADD_WARM);
533 		if (err)
534 			return err;
535 	}
536 	if (flags & TWL4030_WAKEUP12_SCRIPT) {
537 		err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, END_OF_SCRIPT,
538 				       R_SEQ_ADD_S2A12);
539 		if (err)
540 			return err;
541 	}
542 	if (flags & TWL4030_WAKEUP3_SCRIPT) {
543 		err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, END_OF_SCRIPT,
544 				       R_SEQ_ADD_S2A3);
545 		if (err)
546 			return err;
547 	}
548 	if (flags & TWL4030_SLEEP_SCRIPT) {
549 		err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, END_OF_SCRIPT,
550 				       R_SEQ_ADD_A2S);
551 		if (err)
552 			return err;
553 	}
554 
555 	err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0,
556 			       TWL4030_PM_MASTER_PROTECT_KEY);
557 	if (err)
558 		pr_err("TWL4030 Unable to relock registers\n");
559 
560 	return err;
561 }
562 
563 static int
twl4030_power_configure_scripts(const struct twl4030_power_data * pdata)564 twl4030_power_configure_scripts(const struct twl4030_power_data *pdata)
565 {
566 	int err;
567 	int i;
568 	u8 address = twl4030_start_script_address;
569 
570 	for (i = 0; i < pdata->num; i++) {
571 		err = load_twl4030_script(pdata, pdata->scripts[i], address);
572 		if (err)
573 			return err;
574 		address += pdata->scripts[i]->size;
575 	}
576 
577 	return 0;
578 }
579 
twl4030_patch_rconfig(struct twl4030_resconfig * common,struct twl4030_resconfig * board)580 static void twl4030_patch_rconfig(struct twl4030_resconfig *common,
581 				  struct twl4030_resconfig *board)
582 {
583 	while (common->resource) {
584 		struct twl4030_resconfig *b = board;
585 
586 		while (b->resource) {
587 			if (b->resource == common->resource) {
588 				*common = *b;
589 				break;
590 			}
591 			b++;
592 		}
593 		common++;
594 	}
595 }
596 
597 static int
twl4030_power_configure_resources(const struct twl4030_power_data * pdata)598 twl4030_power_configure_resources(const struct twl4030_power_data *pdata)
599 {
600 	struct twl4030_resconfig *resconfig = pdata->resource_config;
601 	struct twl4030_resconfig *boardconf = pdata->board_config;
602 	int err;
603 
604 	if (resconfig) {
605 		if (boardconf)
606 			twl4030_patch_rconfig(resconfig, boardconf);
607 
608 		while (resconfig->resource) {
609 			err = twl4030_configure_resource(resconfig);
610 			if (err)
611 				return err;
612 			resconfig++;
613 		}
614 	}
615 
616 	return 0;
617 }
618 
twl4030_starton_mask_and_set(u8 bitmask,u8 bitvalues)619 static int twl4030_starton_mask_and_set(u8 bitmask, u8 bitvalues)
620 {
621 	u8 regs[3] = { TWL4030_PM_MASTER_CFG_P1_TRANSITION,
622 		       TWL4030_PM_MASTER_CFG_P2_TRANSITION,
623 		       TWL4030_PM_MASTER_CFG_P3_TRANSITION, };
624 	u8 val;
625 	int i, err;
626 
627 	err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
628 			       TWL4030_PM_MASTER_PROTECT_KEY);
629 	if (err)
630 		goto relock;
631 	err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
632 			       TWL4030_PM_MASTER_KEY_CFG2,
633 			       TWL4030_PM_MASTER_PROTECT_KEY);
634 	if (err)
635 		goto relock;
636 
637 	for (i = 0; i < sizeof(regs); i++) {
638 		err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER,
639 				      &val, regs[i]);
640 		if (err)
641 			break;
642 		val = (~bitmask & val) | (bitmask & bitvalues);
643 		err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
644 				       val, regs[i]);
645 		if (err)
646 			break;
647 	}
648 
649 	if (err)
650 		pr_err("TWL4030 Register access failed: %i\n", err);
651 
652 relock:
653 	return twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0,
654 				TWL4030_PM_MASTER_PROTECT_KEY);
655 }
656 
657 /*
658  * In master mode, start the power off sequence.
659  * After a successful execution, TWL shuts down the power to the SoC
660  * and all peripherals connected to it.
661  */
twl4030_power_off(void)662 void twl4030_power_off(void)
663 {
664 	int err;
665 
666 	/* Disable start on charger or VBUS as it can break poweroff */
667 	err = twl4030_starton_mask_and_set(STARTON_VBUS | STARTON_CHG, 0);
668 	if (err)
669 		pr_err("TWL4030 Unable to configure start-up\n");
670 
671 	err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, PWR_DEVOFF,
672 			       TWL4030_PM_MASTER_P1_SW_EVENTS);
673 	if (err)
674 		pr_err("TWL4030 Unable to power off\n");
675 }
676 
twl4030_power_use_poweroff(const struct twl4030_power_data * pdata,struct device_node * node)677 static bool twl4030_power_use_poweroff(const struct twl4030_power_data *pdata,
678 					struct device_node *node)
679 {
680 	if (pdata && pdata->use_poweroff)
681 		return true;
682 
683 	if (of_property_read_bool(node, "ti,system-power-controller"))
684 		return true;
685 
686 	if (of_property_read_bool(node, "ti,use_poweroff"))
687 		return true;
688 
689 	return false;
690 }
691 
692 #ifdef CONFIG_OF
693 
694 /* Generic warm reset configuration for omap3 */
695 
696 static struct twl4030_ins omap3_wrst_seq[] = {
697 	TWL_RESOURCE_OFF(RES_NRES_PWRON),
698 	TWL_RESOURCE_OFF(RES_RESET),
699 	TWL_RESOURCE_RESET(RES_MAIN_REF),
700 	TWL_RESOURCE_GROUP_RESET(RES_GRP_ALL, RES_TYPE_R0, RES_TYPE2_R2),
701 	TWL_RESOURCE_RESET(RES_VUSB_3V1),
702 	TWL_RESOURCE_RESET(RES_VMMC1),
703 	TWL_RESOURCE_GROUP_RESET(RES_GRP_ALL, RES_TYPE_R0, RES_TYPE2_R1),
704 	TWL_RESOURCE_GROUP_RESET(RES_GRP_RC, RES_TYPE_ALL, RES_TYPE2_R0),
705 	TWL_RESOURCE_ON(RES_RESET),
706 	TWL_RESOURCE_ON(RES_NRES_PWRON),
707 };
708 
709 static struct twl4030_script omap3_wrst_script = {
710 	.script	= omap3_wrst_seq,
711 	.size	= ARRAY_SIZE(omap3_wrst_seq),
712 	.flags	= TWL4030_WRST_SCRIPT,
713 };
714 
715 static struct twl4030_script *omap3_reset_scripts[] = {
716 	&omap3_wrst_script,
717 };
718 
719 static struct twl4030_resconfig omap3_rconfig[] = {
720 	TWL_REMAP_SLEEP(RES_HFCLKOUT, DEV_GRP_P3, -1, -1),
721 	TWL_REMAP_SLEEP(RES_VDD1, DEV_GRP_P1, -1, -1),
722 	TWL_REMAP_SLEEP(RES_VDD2, DEV_GRP_P1, -1, -1),
723 	{ 0, 0 },
724 };
725 
726 static struct twl4030_power_data omap3_reset = {
727 	.scripts		= omap3_reset_scripts,
728 	.num			= ARRAY_SIZE(omap3_reset_scripts),
729 	.resource_config	= omap3_rconfig,
730 };
731 
732 /* Recommended generic default idle configuration for off-idle */
733 
734 /* Broadcast message to put res to sleep */
735 static struct twl4030_ins omap3_idle_sleep_on_seq[] = {
736 	TWL_RESOURCE_GROUP_SLEEP(RES_GRP_ALL, RES_TYPE_ALL, 0),
737 };
738 
739 static struct twl4030_script omap3_idle_sleep_on_script = {
740 	.script	= omap3_idle_sleep_on_seq,
741 	.size	= ARRAY_SIZE(omap3_idle_sleep_on_seq),
742 	.flags	= TWL4030_SLEEP_SCRIPT,
743 };
744 
745 /* Broadcast message to put res to active */
746 static struct twl4030_ins omap3_idle_wakeup_p12_seq[] = {
747 	TWL_RESOURCE_GROUP_ACTIVE(RES_GRP_ALL, RES_TYPE_ALL, 0),
748 };
749 
750 static struct twl4030_script omap3_idle_wakeup_p12_script = {
751 	.script	= omap3_idle_wakeup_p12_seq,
752 	.size	= ARRAY_SIZE(omap3_idle_wakeup_p12_seq),
753 	.flags	= TWL4030_WAKEUP12_SCRIPT,
754 };
755 
756 /* Broadcast message to put res to active */
757 static struct twl4030_ins omap3_idle_wakeup_p3_seq[] = {
758 	TWL_RESOURCE_SET_ACTIVE(RES_CLKEN, 0x37),
759 	TWL_RESOURCE_GROUP_ACTIVE(RES_GRP_ALL, RES_TYPE_ALL, 0),
760 };
761 
762 static struct twl4030_script omap3_idle_wakeup_p3_script = {
763 	.script	= omap3_idle_wakeup_p3_seq,
764 	.size	= ARRAY_SIZE(omap3_idle_wakeup_p3_seq),
765 	.flags	= TWL4030_WAKEUP3_SCRIPT,
766 };
767 
768 static struct twl4030_script *omap3_idle_scripts[] = {
769 	&omap3_idle_wakeup_p12_script,
770 	&omap3_idle_wakeup_p3_script,
771 	&omap3_wrst_script,
772 	&omap3_idle_sleep_on_script,
773 };
774 
775 /*
776  * Recommended configuration based on "Recommended Sleep
777  * Sequences for the Zoom Platform":
778  * http://omappedia.com/wiki/File:Recommended_Sleep_Sequences_Zoom.pdf
779  * Note that the type1 and type2 seem to be just the init order number
780  * for type1 and type2 groups as specified in the document mentioned
781  * above.
782  */
783 static struct twl4030_resconfig omap3_idle_rconfig[] = {
784 	TWL_REMAP_SLEEP(RES_VAUX1, TWL4030_RESCONFIG_UNDEF, 0, 0),
785 	TWL_REMAP_SLEEP(RES_VAUX2, TWL4030_RESCONFIG_UNDEF, 0, 0),
786 	TWL_REMAP_SLEEP(RES_VAUX3, TWL4030_RESCONFIG_UNDEF, 0, 0),
787 	TWL_REMAP_SLEEP(RES_VAUX4, TWL4030_RESCONFIG_UNDEF, 0, 0),
788 	TWL_REMAP_SLEEP(RES_VMMC1, TWL4030_RESCONFIG_UNDEF, 0, 0),
789 	TWL_REMAP_SLEEP(RES_VMMC2, TWL4030_RESCONFIG_UNDEF, 0, 0),
790 	TWL_REMAP_OFF(RES_VPLL1, DEV_GRP_P1, 3, 1),
791 	TWL_REMAP_SLEEP(RES_VPLL2, DEV_GRP_P1, 0, 0),
792 	TWL_REMAP_SLEEP(RES_VSIM, TWL4030_RESCONFIG_UNDEF, 0, 0),
793 	TWL_REMAP_SLEEP(RES_VDAC, TWL4030_RESCONFIG_UNDEF, 0, 0),
794 	TWL_REMAP_SLEEP(RES_VINTANA1, TWL_DEV_GRP_P123, 1, 2),
795 	TWL_REMAP_SLEEP(RES_VINTANA2, TWL_DEV_GRP_P123, 0, 2),
796 	TWL_REMAP_SLEEP(RES_VINTDIG, TWL_DEV_GRP_P123, 1, 2),
797 	TWL_REMAP_SLEEP(RES_VIO, TWL_DEV_GRP_P123, 2, 2),
798 	TWL_REMAP_OFF(RES_VDD1, DEV_GRP_P1, 4, 1),
799 	TWL_REMAP_OFF(RES_VDD2, DEV_GRP_P1, 3, 1),
800 	TWL_REMAP_SLEEP(RES_VUSB_1V5, TWL4030_RESCONFIG_UNDEF, 0, 0),
801 	TWL_REMAP_SLEEP(RES_VUSB_1V8, TWL4030_RESCONFIG_UNDEF, 0, 0),
802 	TWL_REMAP_SLEEP(RES_VUSB_3V1, TWL_DEV_GRP_P123, 0, 0),
803 	/* Resource #20 USB charge pump skipped */
804 	TWL_REMAP_SLEEP(RES_REGEN, TWL_DEV_GRP_P123, 2, 1),
805 	TWL_REMAP_SLEEP(RES_NRES_PWRON, TWL_DEV_GRP_P123, 0, 1),
806 	TWL_REMAP_SLEEP(RES_CLKEN, TWL_DEV_GRP_P123, 3, 2),
807 	TWL_REMAP_SLEEP(RES_SYSEN, TWL_DEV_GRP_P123, 6, 1),
808 	TWL_REMAP_SLEEP(RES_HFCLKOUT, DEV_GRP_P3, 0, 2),
809 	TWL_REMAP_SLEEP(RES_32KCLKOUT, TWL_DEV_GRP_P123, 0, 0),
810 	TWL_REMAP_SLEEP(RES_RESET, TWL_DEV_GRP_P123, 6, 0),
811 	TWL_REMAP_SLEEP(RES_MAIN_REF, TWL_DEV_GRP_P123, 0, 0),
812 	{ /* Terminator */ },
813 };
814 
815 static struct twl4030_power_data omap3_idle = {
816 	.scripts		= omap3_idle_scripts,
817 	.num			= ARRAY_SIZE(omap3_idle_scripts),
818 	.resource_config	= omap3_idle_rconfig,
819 };
820 
821 /* Disable 32 KiHz oscillator during idle */
822 static struct twl4030_resconfig osc_off_rconfig[] = {
823 	TWL_REMAP_OFF(RES_CLKEN, DEV_GRP_P1 | DEV_GRP_P3, 3, 2),
824 	{ /* Terminator */ },
825 };
826 
827 static struct twl4030_power_data osc_off_idle = {
828 	.scripts		= omap3_idle_scripts,
829 	.num			= ARRAY_SIZE(omap3_idle_scripts),
830 	.resource_config	= omap3_idle_rconfig,
831 	.board_config		= osc_off_rconfig,
832 };
833 
834 static struct twl4030_power_data omap3_idle_ac_quirk = {
835 	.scripts		= omap3_idle_scripts,
836 	.num			= ARRAY_SIZE(omap3_idle_scripts),
837 	.resource_config	= omap3_idle_rconfig,
838 	.ac_charger_quirk	= true,
839 };
840 
841 static struct twl4030_power_data omap3_idle_ac_quirk_osc_off = {
842 	.scripts		= omap3_idle_scripts,
843 	.num			= ARRAY_SIZE(omap3_idle_scripts),
844 	.resource_config	= omap3_idle_rconfig,
845 	.board_config		= osc_off_rconfig,
846 	.ac_charger_quirk	= true,
847 };
848 
849 static const struct of_device_id twl4030_power_of_match[] = {
850 	{
851 		.compatible = "ti,twl4030-power",
852 	},
853 	{
854 		.compatible = "ti,twl4030-power-reset",
855 		.data = &omap3_reset,
856 	},
857 	{
858 		.compatible = "ti,twl4030-power-idle",
859 		.data = &omap3_idle,
860 	},
861 	{
862 		.compatible = "ti,twl4030-power-idle-osc-off",
863 		.data = &osc_off_idle,
864 	},
865 	{
866 		.compatible = "ti,twl4030-power-omap3-sdp",
867 		.data = &omap3_idle_ac_quirk,
868 	},
869 	{
870 		.compatible = "ti,twl4030-power-omap3-ldp",
871 		.data = &omap3_idle_ac_quirk_osc_off,
872 	},
873 	{
874 		.compatible = "ti,twl4030-power-omap3-evm",
875 		.data = &omap3_idle_ac_quirk,
876 	},
877 	{ },
878 };
879 MODULE_DEVICE_TABLE(of, twl4030_power_of_match);
880 #endif	/* CONFIG_OF */
881 
twl4030_power_probe(struct platform_device * pdev)882 static int twl4030_power_probe(struct platform_device *pdev)
883 {
884 	const struct twl4030_power_data *pdata = dev_get_platdata(&pdev->dev);
885 	struct device_node *node = pdev->dev.of_node;
886 	const struct of_device_id *match;
887 	int err = 0;
888 	int err2 = 0;
889 	u8 val;
890 
891 	if (!pdata && !node) {
892 		dev_err(&pdev->dev, "Platform data is missing\n");
893 		return -EINVAL;
894 	}
895 
896 	err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
897 			       TWL4030_PM_MASTER_PROTECT_KEY);
898 	err |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER,
899 			       TWL4030_PM_MASTER_KEY_CFG2,
900 			       TWL4030_PM_MASTER_PROTECT_KEY);
901 
902 	if (err) {
903 		pr_err("TWL4030 Unable to unlock registers\n");
904 		return err;
905 	}
906 
907 	match = of_match_device(of_match_ptr(twl4030_power_of_match),
908 				&pdev->dev);
909 	if (match && match->data)
910 		pdata = match->data;
911 
912 	if (pdata) {
913 		err = twl4030_power_configure_scripts(pdata);
914 		if (err) {
915 			pr_err("TWL4030 failed to load scripts\n");
916 			goto relock;
917 		}
918 		err = twl4030_power_configure_resources(pdata);
919 		if (err) {
920 			pr_err("TWL4030 failed to configure resource\n");
921 			goto relock;
922 		}
923 	}
924 
925 	/* Board has to be wired properly to use this feature */
926 	if (twl4030_power_use_poweroff(pdata, node) && !pm_power_off) {
927 		/* Default for SEQ_OFFSYNC is set, lets ensure this */
928 		err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &val,
929 				      TWL4030_PM_MASTER_CFG_P123_TRANSITION);
930 		if (err) {
931 			pr_warn("TWL4030 Unable to read registers\n");
932 		} else if (!(val & SEQ_OFFSYNC)) {
933 			val |= SEQ_OFFSYNC;
934 			err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, val,
935 					TWL4030_PM_MASTER_CFG_P123_TRANSITION);
936 			if (err) {
937 				pr_err("TWL4030 Unable to setup SEQ_OFFSYNC\n");
938 				goto relock;
939 			}
940 		}
941 
942 		pm_power_off = twl4030_power_off;
943 	}
944 
945 relock:
946 	err2 = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0,
947 			       TWL4030_PM_MASTER_PROTECT_KEY);
948 	if (err2) {
949 		pr_err("TWL4030 Unable to relock registers\n");
950 		return err2;
951 	}
952 
953 	return err;
954 }
955 
twl4030_power_remove(struct platform_device * pdev)956 static int twl4030_power_remove(struct platform_device *pdev)
957 {
958 	return 0;
959 }
960 
961 static struct platform_driver twl4030_power_driver = {
962 	.driver = {
963 		.name	= "twl4030_power",
964 		.of_match_table = of_match_ptr(twl4030_power_of_match),
965 	},
966 	.probe		= twl4030_power_probe,
967 	.remove		= twl4030_power_remove,
968 };
969 
970 module_platform_driver(twl4030_power_driver);
971 
972 MODULE_AUTHOR("Nokia Corporation");
973 MODULE_AUTHOR("Texas Instruments, Inc.");
974 MODULE_DESCRIPTION("Power management for TWL4030");
975 MODULE_LICENSE("GPL");
976 MODULE_ALIAS("platform:twl4030_power");
977