diff options
author | Amit Kucheria <amit.kucheria@verdurent.com> | 2009-08-31 12:32:18 -0400 |
---|---|---|
committer | Samuel Ortiz <sameo@linux.intel.com> | 2009-09-17 03:47:22 -0400 |
commit | ebf0bd366ed8161e6fbc919705d878ccbfd51624 (patch) | |
tree | e6425ad580bdc6a4bc34163dcde3f08b6deb7474 /drivers/mfd/twl4030-power.c | |
parent | 12992dd89c84839167f97aae540f2ec889daf782 (diff) |
mfd: Add support for TWL4030/5030 dynamic power switching
The TWL4030/5030 family of multifunction devices allows board-specific
control of the the various regulators, clock and reset lines through
'scripts' that are loaded into its memory. This allows for Dynamic Power
Switching (DPS).
Implement board-independent core support for DPS that is then used by
board-specific code to load custom DPS scripts.
Signed-off-by: Amit Kucheria <amit.kucheria@verdurent.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd/twl4030-power.c')
-rw-r--r-- | drivers/mfd/twl4030-power.c | 466 |
1 files changed, 466 insertions, 0 deletions
diff --git a/drivers/mfd/twl4030-power.c b/drivers/mfd/twl4030-power.c new file mode 100644 index 000000000000..e7688b041264 --- /dev/null +++ b/drivers/mfd/twl4030-power.c | |||
@@ -0,0 +1,466 @@ | |||
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/twl4030.h> | ||
30 | #include <linux/platform_device.h> | ||
31 | |||
32 | #include <asm/mach-types.h> | ||
33 | |||
34 | static u8 twl4030_start_script_address = 0x2b; | ||
35 | |||
36 | #define PWR_P1_SW_EVENTS 0x10 | ||
37 | #define PWR_DEVOFF (1<<0) | ||
38 | |||
39 | #define PHY_TO_OFF_PM_MASTER(p) (p - 0x36) | ||
40 | #define PHY_TO_OFF_PM_RECEIVER(p) (p - 0x5b) | ||
41 | |||
42 | /* resource - hfclk */ | ||
43 | #define R_HFCLKOUT_DEV_GRP PHY_TO_OFF_PM_RECEIVER(0xe6) | ||
44 | |||
45 | /* PM events */ | ||
46 | #define R_P1_SW_EVENTS PHY_TO_OFF_PM_MASTER(0x46) | ||
47 | #define R_P2_SW_EVENTS PHY_TO_OFF_PM_MASTER(0x47) | ||
48 | #define R_P3_SW_EVENTS PHY_TO_OFF_PM_MASTER(0x48) | ||
49 | #define R_CFG_P1_TRANSITION PHY_TO_OFF_PM_MASTER(0x36) | ||
50 | #define R_CFG_P2_TRANSITION PHY_TO_OFF_PM_MASTER(0x37) | ||
51 | #define R_CFG_P3_TRANSITION PHY_TO_OFF_PM_MASTER(0x38) | ||
52 | |||
53 | #define LVL_WAKEUP 0x08 | ||
54 | |||
55 | #define ENABLE_WARMRESET (1<<4) | ||
56 | |||
57 | #define END_OF_SCRIPT 0x3f | ||
58 | |||
59 | #define R_SEQ_ADD_A2S PHY_TO_OFF_PM_MASTER(0x55) | ||
60 | #define R_SEQ_ADD_S2A12 PHY_TO_OFF_PM_MASTER(0x56) | ||
61 | #define R_SEQ_ADD_S2A3 PHY_TO_OFF_PM_MASTER(0x57) | ||
62 | #define R_SEQ_ADD_WARM PHY_TO_OFF_PM_MASTER(0x58) | ||
63 | #define R_MEMORY_ADDRESS PHY_TO_OFF_PM_MASTER(0x59) | ||
64 | #define R_MEMORY_DATA PHY_TO_OFF_PM_MASTER(0x5a) | ||
65 | |||
66 | #define R_PROTECT_KEY 0x0E | ||
67 | #define KEY_1 0xC0 | ||
68 | #define KEY_2 0x0C | ||
69 | |||
70 | /* resource configuration registers */ | ||
71 | |||
72 | #define DEVGROUP_OFFSET 0 | ||
73 | #define TYPE_OFFSET 1 | ||
74 | |||
75 | /* Bit positions */ | ||
76 | #define DEVGROUP_SHIFT 5 | ||
77 | #define DEVGROUP_MASK (7 << DEVGROUP_SHIFT) | ||
78 | #define TYPE_SHIFT 0 | ||
79 | #define TYPE_MASK (7 << TYPE_SHIFT) | ||
80 | #define TYPE2_SHIFT 3 | ||
81 | #define TYPE2_MASK (3 << TYPE2_SHIFT) | ||
82 | |||
83 | static u8 res_config_addrs[] = { | ||
84 | [RES_VAUX1] = 0x17, | ||
85 | [RES_VAUX2] = 0x1b, | ||
86 | [RES_VAUX3] = 0x1f, | ||
87 | [RES_VAUX4] = 0x23, | ||
88 | [RES_VMMC1] = 0x27, | ||
89 | [RES_VMMC2] = 0x2b, | ||
90 | [RES_VPLL1] = 0x2f, | ||
91 | [RES_VPLL2] = 0x33, | ||
92 | [RES_VSIM] = 0x37, | ||
93 | [RES_VDAC] = 0x3b, | ||
94 | [RES_VINTANA1] = 0x3f, | ||
95 | [RES_VINTANA2] = 0x43, | ||
96 | [RES_VINTDIG] = 0x47, | ||
97 | [RES_VIO] = 0x4b, | ||
98 | [RES_VDD1] = 0x55, | ||
99 | [RES_VDD2] = 0x63, | ||
100 | [RES_VUSB_1V5] = 0x71, | ||
101 | [RES_VUSB_1V8] = 0x74, | ||
102 | [RES_VUSB_3V1] = 0x77, | ||
103 | [RES_VUSBCP] = 0x7a, | ||
104 | [RES_REGEN] = 0x7f, | ||
105 | [RES_NRES_PWRON] = 0x82, | ||
106 | [RES_CLKEN] = 0x85, | ||
107 | [RES_SYSEN] = 0x88, | ||
108 | [RES_HFCLKOUT] = 0x8b, | ||
109 | [RES_32KCLKOUT] = 0x8e, | ||
110 | [RES_RESET] = 0x91, | ||
111 | [RES_Main_Ref] = 0x94, | ||
112 | }; | ||
113 | |||
114 | static int __init twl4030_write_script_byte(u8 address, u8 byte) | ||
115 | { | ||
116 | int err; | ||
117 | |||
118 | err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address, | ||
119 | R_MEMORY_ADDRESS); | ||
120 | if (err) | ||
121 | goto out; | ||
122 | err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, byte, | ||
123 | R_MEMORY_DATA); | ||
124 | out: | ||
125 | return err; | ||
126 | } | ||
127 | |||
128 | static int __init twl4030_write_script_ins(u8 address, u16 pmb_message, | ||
129 | u8 delay, u8 next) | ||
130 | { | ||
131 | int err; | ||
132 | |||
133 | address *= 4; | ||
134 | err = twl4030_write_script_byte(address++, pmb_message >> 8); | ||
135 | if (err) | ||
136 | goto out; | ||
137 | err = twl4030_write_script_byte(address++, pmb_message & 0xff); | ||
138 | if (err) | ||
139 | goto out; | ||
140 | err = twl4030_write_script_byte(address++, delay); | ||
141 | if (err) | ||
142 | goto out; | ||
143 | err = twl4030_write_script_byte(address++, next); | ||
144 | out: | ||
145 | return err; | ||
146 | } | ||
147 | |||
148 | static int __init twl4030_write_script(u8 address, struct twl4030_ins *script, | ||
149 | int len) | ||
150 | { | ||
151 | int err; | ||
152 | |||
153 | for (; len; len--, address++, script++) { | ||
154 | if (len == 1) { | ||
155 | err = twl4030_write_script_ins(address, | ||
156 | script->pmb_message, | ||
157 | script->delay, | ||
158 | END_OF_SCRIPT); | ||
159 | if (err) | ||
160 | break; | ||
161 | } else { | ||
162 | err = twl4030_write_script_ins(address, | ||
163 | script->pmb_message, | ||
164 | script->delay, | ||
165 | address + 1); | ||
166 | if (err) | ||
167 | break; | ||
168 | } | ||
169 | } | ||
170 | return err; | ||
171 | } | ||
172 | |||
173 | static int __init twl4030_config_wakeup3_sequence(u8 address) | ||
174 | { | ||
175 | int err; | ||
176 | u8 data; | ||
177 | |||
178 | /* Set SLEEP to ACTIVE SEQ address for P3 */ | ||
179 | err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address, | ||
180 | R_SEQ_ADD_S2A3); | ||
181 | if (err) | ||
182 | goto out; | ||
183 | |||
184 | /* P3 LVL_WAKEUP should be on LEVEL */ | ||
185 | err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data, | ||
186 | R_P3_SW_EVENTS); | ||
187 | if (err) | ||
188 | goto out; | ||
189 | data |= LVL_WAKEUP; | ||
190 | err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data, | ||
191 | R_P3_SW_EVENTS); | ||
192 | out: | ||
193 | if (err) | ||
194 | pr_err("TWL4030 wakeup sequence for P3 config error\n"); | ||
195 | return err; | ||
196 | } | ||
197 | |||
198 | static int __init twl4030_config_wakeup12_sequence(u8 address) | ||
199 | { | ||
200 | int err = 0; | ||
201 | u8 data; | ||
202 | |||
203 | /* Set SLEEP to ACTIVE SEQ address for P1 and P2 */ | ||
204 | err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address, | ||
205 | R_SEQ_ADD_S2A12); | ||
206 | if (err) | ||
207 | goto out; | ||
208 | |||
209 | /* P1/P2 LVL_WAKEUP should be on LEVEL */ | ||
210 | err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data, | ||
211 | R_P1_SW_EVENTS); | ||
212 | if (err) | ||
213 | goto out; | ||
214 | |||
215 | data |= LVL_WAKEUP; | ||
216 | err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data, | ||
217 | R_P1_SW_EVENTS); | ||
218 | if (err) | ||
219 | goto out; | ||
220 | |||
221 | err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data, | ||
222 | R_P2_SW_EVENTS); | ||
223 | if (err) | ||
224 | goto out; | ||
225 | |||
226 | data |= LVL_WAKEUP; | ||
227 | err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data, | ||
228 | R_P2_SW_EVENTS); | ||
229 | if (err) | ||
230 | goto out; | ||
231 | |||
232 | if (machine_is_omap_3430sdp() || machine_is_omap_ldp()) { | ||
233 | /* Disabling AC charger effect on sleep-active transitions */ | ||
234 | err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data, | ||
235 | R_CFG_P1_TRANSITION); | ||
236 | if (err) | ||
237 | goto out; | ||
238 | data &= ~(1<<1); | ||
239 | err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data , | ||
240 | R_CFG_P1_TRANSITION); | ||
241 | if (err) | ||
242 | goto out; | ||
243 | } | ||
244 | |||
245 | out: | ||
246 | if (err) | ||
247 | pr_err("TWL4030 wakeup sequence for P1 and P2" \ | ||
248 | "config error\n"); | ||
249 | return err; | ||
250 | } | ||
251 | |||
252 | static int __init twl4030_config_sleep_sequence(u8 address) | ||
253 | { | ||
254 | int err; | ||
255 | |||
256 | /* Set ACTIVE to SLEEP SEQ address in T2 memory*/ | ||
257 | err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address, | ||
258 | R_SEQ_ADD_A2S); | ||
259 | |||
260 | if (err) | ||
261 | pr_err("TWL4030 sleep sequence config error\n"); | ||
262 | |||
263 | return err; | ||
264 | } | ||
265 | |||
266 | static int __init twl4030_config_warmreset_sequence(u8 address) | ||
267 | { | ||
268 | int err; | ||
269 | u8 rd_data; | ||
270 | |||
271 | /* Set WARM RESET SEQ address for P1 */ | ||
272 | err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address, | ||
273 | R_SEQ_ADD_WARM); | ||
274 | if (err) | ||
275 | goto out; | ||
276 | |||
277 | /* P1/P2/P3 enable WARMRESET */ | ||
278 | err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &rd_data, | ||
279 | R_P1_SW_EVENTS); | ||
280 | if (err) | ||
281 | goto out; | ||
282 | |||
283 | rd_data |= ENABLE_WARMRESET; | ||
284 | err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, rd_data, | ||
285 | R_P1_SW_EVENTS); | ||
286 | if (err) | ||
287 | goto out; | ||
288 | |||
289 | err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &rd_data, | ||
290 | R_P2_SW_EVENTS); | ||
291 | if (err) | ||
292 | goto out; | ||
293 | |||
294 | rd_data |= ENABLE_WARMRESET; | ||
295 | err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, rd_data, | ||
296 | R_P2_SW_EVENTS); | ||
297 | if (err) | ||
298 | goto out; | ||
299 | |||
300 | err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &rd_data, | ||
301 | R_P3_SW_EVENTS); | ||
302 | if (err) | ||
303 | goto out; | ||
304 | |||
305 | rd_data |= ENABLE_WARMRESET; | ||
306 | err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, rd_data, | ||
307 | R_P3_SW_EVENTS); | ||
308 | out: | ||
309 | if (err) | ||
310 | pr_err("TWL4030 warmreset seq config error\n"); | ||
311 | return err; | ||
312 | } | ||
313 | |||
314 | static int __init twl4030_configure_resource(struct twl4030_resconfig *rconfig) | ||
315 | { | ||
316 | int rconfig_addr; | ||
317 | int err; | ||
318 | u8 type; | ||
319 | u8 grp; | ||
320 | |||
321 | if (rconfig->resource > TOTAL_RESOURCES) { | ||
322 | pr_err("TWL4030 Resource %d does not exist\n", | ||
323 | rconfig->resource); | ||
324 | return -EINVAL; | ||
325 | } | ||
326 | |||
327 | rconfig_addr = res_config_addrs[rconfig->resource]; | ||
328 | |||
329 | /* Set resource group */ | ||
330 | err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, &grp, | ||
331 | rconfig_addr + DEVGROUP_OFFSET); | ||
332 | if (err) { | ||
333 | pr_err("TWL4030 Resource %d group could not be read\n", | ||
334 | rconfig->resource); | ||
335 | return err; | ||
336 | } | ||
337 | |||
338 | if (rconfig->devgroup >= 0) { | ||
339 | grp &= ~DEVGROUP_MASK; | ||
340 | grp |= rconfig->devgroup << DEVGROUP_SHIFT; | ||
341 | err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, | ||
342 | grp, rconfig_addr + DEVGROUP_OFFSET); | ||
343 | if (err < 0) { | ||
344 | pr_err("TWL4030 failed to program devgroup\n"); | ||
345 | return err; | ||
346 | } | ||
347 | } | ||
348 | |||
349 | /* Set resource types */ | ||
350 | err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, &type, | ||
351 | rconfig_addr + TYPE_OFFSET); | ||
352 | if (err < 0) { | ||
353 | pr_err("TWL4030 Resource %d type could not be read\n", | ||
354 | rconfig->resource); | ||
355 | return err; | ||
356 | } | ||
357 | |||
358 | if (rconfig->type >= 0) { | ||
359 | type &= ~TYPE_MASK; | ||
360 | type |= rconfig->type << TYPE_SHIFT; | ||
361 | } | ||
362 | |||
363 | if (rconfig->type2 >= 0) { | ||
364 | type &= ~TYPE2_MASK; | ||
365 | type |= rconfig->type2 << TYPE2_SHIFT; | ||
366 | } | ||
367 | |||
368 | err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, | ||
369 | type, rconfig_addr + TYPE_OFFSET); | ||
370 | if (err < 0) { | ||
371 | pr_err("TWL4030 failed to program resource type\n"); | ||
372 | return err; | ||
373 | } | ||
374 | |||
375 | return 0; | ||
376 | } | ||
377 | |||
378 | static int __init load_twl4030_script(struct twl4030_script *tscript, | ||
379 | u8 address) | ||
380 | { | ||
381 | int err; | ||
382 | |||
383 | /* Make sure the script isn't going beyond last valid address (0x3f) */ | ||
384 | if ((address + tscript->size) > END_OF_SCRIPT) { | ||
385 | pr_err("TWL4030 scripts too big error\n"); | ||
386 | return -EINVAL; | ||
387 | } | ||
388 | |||
389 | err = twl4030_write_script(address, tscript->script, tscript->size); | ||
390 | if (err) | ||
391 | goto out; | ||
392 | |||
393 | if (tscript->flags & TWL4030_WRST_SCRIPT) { | ||
394 | err = twl4030_config_warmreset_sequence(address); | ||
395 | if (err) | ||
396 | goto out; | ||
397 | } | ||
398 | if (tscript->flags & TWL4030_WAKEUP12_SCRIPT) { | ||
399 | err = twl4030_config_wakeup12_sequence(address); | ||
400 | if (err) | ||
401 | goto out; | ||
402 | } | ||
403 | if (tscript->flags & TWL4030_WAKEUP3_SCRIPT) { | ||
404 | err = twl4030_config_wakeup3_sequence(address); | ||
405 | if (err) | ||
406 | goto out; | ||
407 | } | ||
408 | if (tscript->flags & TWL4030_SLEEP_SCRIPT) | ||
409 | err = twl4030_config_sleep_sequence(address); | ||
410 | out: | ||
411 | return err; | ||
412 | } | ||
413 | |||
414 | void __init twl4030_power_init(struct twl4030_power_data *twl4030_scripts) | ||
415 | { | ||
416 | int err = 0; | ||
417 | int i; | ||
418 | struct twl4030_resconfig *resconfig; | ||
419 | u8 address = twl4030_start_script_address; | ||
420 | |||
421 | err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_1, | ||
422 | R_PROTECT_KEY); | ||
423 | if (err) | ||
424 | goto unlock; | ||
425 | |||
426 | err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_2, | ||
427 | R_PROTECT_KEY); | ||
428 | if (err) | ||
429 | goto unlock; | ||
430 | |||
431 | for (i = 0; i < twl4030_scripts->num; i++) { | ||
432 | err = load_twl4030_script(twl4030_scripts->scripts[i], address); | ||
433 | if (err) | ||
434 | goto load; | ||
435 | address += twl4030_scripts->scripts[i]->size; | ||
436 | } | ||
437 | |||
438 | resconfig = twl4030_scripts->resource_config; | ||
439 | if (resconfig) { | ||
440 | while (resconfig->resource) { | ||
441 | err = twl4030_configure_resource(resconfig); | ||
442 | if (err) | ||
443 | goto resource; | ||
444 | resconfig++; | ||
445 | |||
446 | } | ||
447 | } | ||
448 | |||
449 | err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0, R_PROTECT_KEY); | ||
450 | if (err) | ||
451 | pr_err("TWL4030 Unable to relock registers\n"); | ||
452 | return; | ||
453 | |||
454 | unlock: | ||
455 | if (err) | ||
456 | pr_err("TWL4030 Unable to unlock registers\n"); | ||
457 | return; | ||
458 | load: | ||
459 | if (err) | ||
460 | pr_err("TWL4030 failed to load scripts\n"); | ||
461 | return; | ||
462 | resource: | ||
463 | if (err) | ||
464 | pr_err("TWL4030 failed to configure resource\n"); | ||
465 | return; | ||
466 | } | ||