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block: move down direct IO plugging
[linux/fpc-iii.git] / drivers / mfd / arizona-core.c
blobc7983e862549a0b79775cae3e76c7cf0c867ad83
1 /*
2 * Arizona core driver
3 *
4 * Copyright 2012 Wolfson Microelectronics plc
5 *
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13 #include <linux/delay.h>
14 #include <linux/err.h>
15 #include <linux/gpio.h>
16 #include <linux/interrupt.h>
17 #include <linux/mfd/core.h>
18 #include <linux/module.h>
19 #include <linux/pm_runtime.h>
20 #include <linux/regmap.h>
21 #include <linux/regulator/consumer.h>
22 #include <linux/slab.h>
23
24 #include <linux/mfd/arizona/core.h>
25 #include <linux/mfd/arizona/registers.h>
26
27 #include "arizona.h"
28
29 static const char *wm5102_core_supplies[] = {
30 "AVDD",
31 "DBVDD1",
32 };
33
34 int arizona_clk32k_enable(struct arizona *arizona)
35 {
36 int ret = 0;
37
38 mutex_lock(&arizona->clk_lock);
39
40 arizona->clk32k_ref++;
41
42 if (arizona->clk32k_ref == 1)
43 ret = regmap_update_bits(arizona->regmap, ARIZONA_CLOCK_32K_1,
44 ARIZONA_CLK_32K_ENA,
45 ARIZONA_CLK_32K_ENA);
46
47 if (ret != 0)
48 arizona->clk32k_ref--;
49
50 mutex_unlock(&arizona->clk_lock);
51
52 return ret;
53 }
54 EXPORT_SYMBOL_GPL(arizona_clk32k_enable);
55
56 int arizona_clk32k_disable(struct arizona *arizona)
57 {
58 int ret = 0;
59
60 mutex_lock(&arizona->clk_lock);
61
62 BUG_ON(arizona->clk32k_ref <= 0);
63
64 arizona->clk32k_ref--;
65
66 if (arizona->clk32k_ref == 0)
67 regmap_update_bits(arizona->regmap, ARIZONA_CLOCK_32K_1,
68 ARIZONA_CLK_32K_ENA, 0);
69
70 mutex_unlock(&arizona->clk_lock);
71
72 return ret;
73 }
74 EXPORT_SYMBOL_GPL(arizona_clk32k_disable);
75
76 static irqreturn_t arizona_clkgen_err(int irq, void *data)
77 {
78 struct arizona *arizona = data;
79
80 dev_err(arizona->dev, "CLKGEN error\n");
81
82 return IRQ_HANDLED;
83 }
84
85 static irqreturn_t arizona_underclocked(int irq, void *data)
86 {
87 struct arizona *arizona = data;
88 unsigned int val;
89 int ret;
90
91 ret = regmap_read(arizona->regmap, ARIZONA_INTERRUPT_RAW_STATUS_8,
92 &val);
93 if (ret != 0) {
94 dev_err(arizona->dev, "Failed to read underclock status: %d\n",
95 ret);
96 return IRQ_NONE;
97 }
98
99 if (val & ARIZONA_AIF3_UNDERCLOCKED_STS)
100 dev_err(arizona->dev, "AIF3 underclocked\n");
101 if (val & ARIZONA_AIF3_UNDERCLOCKED_STS)
102 dev_err(arizona->dev, "AIF3 underclocked\n");
103 if (val & ARIZONA_AIF2_UNDERCLOCKED_STS)
104 dev_err(arizona->dev, "AIF1 underclocked\n");
105 if (val & ARIZONA_ISRC2_UNDERCLOCKED_STS)
106 dev_err(arizona->dev, "ISRC2 underclocked\n");
107 if (val & ARIZONA_ISRC1_UNDERCLOCKED_STS)
108 dev_err(arizona->dev, "ISRC1 underclocked\n");
109 if (val & ARIZONA_FX_UNDERCLOCKED_STS)
110 dev_err(arizona->dev, "FX underclocked\n");
111 if (val & ARIZONA_ASRC_UNDERCLOCKED_STS)
112 dev_err(arizona->dev, "ASRC underclocked\n");
113 if (val & ARIZONA_DAC_UNDERCLOCKED_STS)
114 dev_err(arizona->dev, "DAC underclocked\n");
115 if (val & ARIZONA_ADC_UNDERCLOCKED_STS)
116 dev_err(arizona->dev, "ADC underclocked\n");
117 if (val & ARIZONA_MIXER_UNDERCLOCKED_STS)
118 dev_err(arizona->dev, "Mixer underclocked\n");
119
120 return IRQ_HANDLED;
121 }
122
123 static irqreturn_t arizona_overclocked(int irq, void *data)
124 {
125 struct arizona *arizona = data;
126 unsigned int val[2];
127 int ret;
128
129 ret = regmap_bulk_read(arizona->regmap, ARIZONA_INTERRUPT_RAW_STATUS_6,
130 &val[0], 2);
131 if (ret != 0) {
132 dev_err(arizona->dev, "Failed to read overclock status: %d\n",
133 ret);
134 return IRQ_NONE;
135 }
136
137 if (val[0] & ARIZONA_PWM_OVERCLOCKED_STS)
138 dev_err(arizona->dev, "PWM overclocked\n");
139 if (val[0] & ARIZONA_FX_CORE_OVERCLOCKED_STS)
140 dev_err(arizona->dev, "FX core overclocked\n");
141 if (val[0] & ARIZONA_DAC_SYS_OVERCLOCKED_STS)
142 dev_err(arizona->dev, "DAC SYS overclocked\n");
143 if (val[0] & ARIZONA_DAC_WARP_OVERCLOCKED_STS)
144 dev_err(arizona->dev, "DAC WARP overclocked\n");
145 if (val[0] & ARIZONA_ADC_OVERCLOCKED_STS)
146 dev_err(arizona->dev, "ADC overclocked\n");
147 if (val[0] & ARIZONA_MIXER_OVERCLOCKED_STS)
148 dev_err(arizona->dev, "Mixer overclocked\n");
149 if (val[0] & ARIZONA_AIF3_SYNC_OVERCLOCKED_STS)
150 dev_err(arizona->dev, "AIF3 overclocked\n");
151 if (val[0] & ARIZONA_AIF2_SYNC_OVERCLOCKED_STS)
152 dev_err(arizona->dev, "AIF2 overclocked\n");
153 if (val[0] & ARIZONA_AIF1_SYNC_OVERCLOCKED_STS)
154 dev_err(arizona->dev, "AIF1 overclocked\n");
155 if (val[0] & ARIZONA_PAD_CTRL_OVERCLOCKED_STS)
156 dev_err(arizona->dev, "Pad control overclocked\n");
157
158 if (val[1] & ARIZONA_SLIMBUS_SUBSYS_OVERCLOCKED_STS)
159 dev_err(arizona->dev, "Slimbus subsystem overclocked\n");
160 if (val[1] & ARIZONA_SLIMBUS_ASYNC_OVERCLOCKED_STS)
161 dev_err(arizona->dev, "Slimbus async overclocked\n");
162 if (val[1] & ARIZONA_SLIMBUS_SYNC_OVERCLOCKED_STS)
163 dev_err(arizona->dev, "Slimbus sync overclocked\n");
164 if (val[1] & ARIZONA_ASRC_ASYNC_SYS_OVERCLOCKED_STS)
165 dev_err(arizona->dev, "ASRC async system overclocked\n");
166 if (val[1] & ARIZONA_ASRC_ASYNC_WARP_OVERCLOCKED_STS)
167 dev_err(arizona->dev, "ASRC async WARP overclocked\n");
168 if (val[1] & ARIZONA_ASRC_SYNC_SYS_OVERCLOCKED_STS)
169 dev_err(arizona->dev, "ASRC sync system overclocked\n");
170 if (val[1] & ARIZONA_ASRC_SYNC_WARP_OVERCLOCKED_STS)
171 dev_err(arizona->dev, "ASRC sync WARP overclocked\n");
172 if (val[1] & ARIZONA_ADSP2_1_OVERCLOCKED_STS)
173 dev_err(arizona->dev, "DSP1 overclocked\n");
174 if (val[1] & ARIZONA_ISRC2_OVERCLOCKED_STS)
175 dev_err(arizona->dev, "ISRC2 overclocked\n");
176 if (val[1] & ARIZONA_ISRC1_OVERCLOCKED_STS)
177 dev_err(arizona->dev, "ISRC1 overclocked\n");
178
179 return IRQ_HANDLED;
180 }
181
182 static int arizona_wait_for_boot(struct arizona *arizona)
183 {
184 unsigned int reg;
185 int ret, i;
186
187 /*
188 * We can't use an interrupt as we need to runtime resume to do so,
189 * we won't race with the interrupt handler as it'll be blocked on
190 * runtime resume.
191 */
192 for (i = 0; i < 5; i++) {
193 msleep(1);
194
195 ret = regmap_read(arizona->regmap,
196 ARIZONA_INTERRUPT_RAW_STATUS_5, &reg);
197 if (ret != 0) {
198 dev_err(arizona->dev, "Failed to read boot state: %d\n",
199 ret);
200 continue;
201 }
202
203 if (reg & ARIZONA_BOOT_DONE_STS)
204 break;
205 }
206
207 if (reg & ARIZONA_BOOT_DONE_STS) {
208 regmap_write(arizona->regmap, ARIZONA_INTERRUPT_STATUS_5,
209 ARIZONA_BOOT_DONE_STS);
210 } else {
211 dev_err(arizona->dev, "Device boot timed out: %x\n", reg);
212 return -ETIMEDOUT;
213 }
214
215 pm_runtime_mark_last_busy(arizona->dev);
216
217 return 0;
218 }
219
220 #ifdef CONFIG_PM_RUNTIME
221 static int arizona_runtime_resume(struct device *dev)
222 {
223 struct arizona *arizona = dev_get_drvdata(dev);
224 int ret;
225
226 dev_dbg(arizona->dev, "Leaving AoD mode\n");
227
228 ret = regulator_enable(arizona->dcvdd);
229 if (ret != 0) {
230 dev_err(arizona->dev, "Failed to enable DCVDD: %d\n", ret);
231 return ret;
232 }
233
234 regcache_cache_only(arizona->regmap, false);
235
236 ret = arizona_wait_for_boot(arizona);
237 if (ret != 0) {
238 regulator_disable(arizona->dcvdd);
239 return ret;
240 }
241
242 regcache_sync(arizona->regmap);
243
244 return 0;
245 }
246
247 static int arizona_runtime_suspend(struct device *dev)
248 {
249 struct arizona *arizona = dev_get_drvdata(dev);
250
251 dev_dbg(arizona->dev, "Entering AoD mode\n");
252
253 regulator_disable(arizona->dcvdd);
254 regcache_cache_only(arizona->regmap, true);
255 regcache_mark_dirty(arizona->regmap);
256
257 return 0;
258 }
259 #endif
260
261 const struct dev_pm_ops arizona_pm_ops = {
262 SET_RUNTIME_PM_OPS(arizona_runtime_suspend,
263 arizona_runtime_resume,
264 NULL)
265 };
266 EXPORT_SYMBOL_GPL(arizona_pm_ops);
267
268 static struct mfd_cell early_devs[] = {
269 { .name = "arizona-ldo1" },
270 };
271
272 static struct mfd_cell wm5102_devs[] = {
273 { .name = "arizona-extcon" },
274 { .name = "arizona-gpio" },
275 { .name = "arizona-micsupp" },
276 { .name = "arizona-pwm" },
277 { .name = "wm5102-codec" },
278 };
279
280 static struct mfd_cell wm5110_devs[] = {
281 { .name = "arizona-extcon" },
282 { .name = "arizona-gpio" },
283 { .name = "arizona-micsupp" },
284 { .name = "arizona-pwm" },
285 { .name = "wm5110-codec" },
286 };
287
288 int __devinit arizona_dev_init(struct arizona *arizona)
289 {
290 struct device *dev = arizona->dev;
291 const char *type_name;
292 unsigned int reg, val;
293 int ret, i;
294
295 dev_set_drvdata(arizona->dev, arizona);
296 mutex_init(&arizona->clk_lock);
297
298 if (dev_get_platdata(arizona->dev))
299 memcpy(&arizona->pdata, dev_get_platdata(arizona->dev),
300 sizeof(arizona->pdata));
301
302 regcache_cache_only(arizona->regmap, true);
303
304 switch (arizona->type) {
305 case WM5102:
306 case WM5110:
307 for (i = 0; i < ARRAY_SIZE(wm5102_core_supplies); i++)
308 arizona->core_supplies[i].supply
309 = wm5102_core_supplies[i];
310 arizona->num_core_supplies = ARRAY_SIZE(wm5102_core_supplies);
311 break;
312 default:
313 dev_err(arizona->dev, "Unknown device type %d\n",
314 arizona->type);
315 return -EINVAL;
316 }
317
318 ret = mfd_add_devices(arizona->dev, -1, early_devs,
319 ARRAY_SIZE(early_devs), NULL, 0);
320 if (ret != 0) {
321 dev_err(dev, "Failed to add early children: %d\n", ret);
322 return ret;
323 }
324
325 ret = devm_regulator_bulk_get(dev, arizona->num_core_supplies,
326 arizona->core_supplies);
327 if (ret != 0) {
328 dev_err(dev, "Failed to request core supplies: %d\n",
329 ret);
330 goto err_early;
331 }
332
333 arizona->dcvdd = devm_regulator_get(arizona->dev, "DCVDD");
334 if (IS_ERR(arizona->dcvdd)) {
335 ret = PTR_ERR(arizona->dcvdd);
336 dev_err(dev, "Failed to request DCVDD: %d\n", ret);
337 goto err_early;
338 }
339
340 ret = regulator_bulk_enable(arizona->num_core_supplies,
341 arizona->core_supplies);
342 if (ret != 0) {
343 dev_err(dev, "Failed to enable core supplies: %d\n",
344 ret);
345 goto err_early;
346 }
347
348 ret = regulator_enable(arizona->dcvdd);
349 if (ret != 0) {
350 dev_err(dev, "Failed to enable DCVDD: %d\n", ret);
351 goto err_enable;
352 }
353
354 if (arizona->pdata.reset) {
355 /* Start out with /RESET low to put the chip into reset */
356 ret = gpio_request_one(arizona->pdata.reset,
357 GPIOF_DIR_OUT | GPIOF_INIT_LOW,
358 "arizona /RESET");
359 if (ret != 0) {
360 dev_err(dev, "Failed to request /RESET: %d\n", ret);
361 goto err_dcvdd;
362 }
363
364 gpio_set_value_cansleep(arizona->pdata.reset, 1);
365 }
366
367 regcache_cache_only(arizona->regmap, false);
368
369 ret = regmap_read(arizona->regmap, ARIZONA_SOFTWARE_RESET, &reg);
370 if (ret != 0) {
371 dev_err(dev, "Failed to read ID register: %d\n", ret);
372 goto err_reset;
373 }
374
375 ret = regmap_read(arizona->regmap, ARIZONA_DEVICE_REVISION,
376 &arizona->rev);
377 if (ret != 0) {
378 dev_err(dev, "Failed to read revision register: %d\n", ret);
379 goto err_reset;
380 }
381 arizona->rev &= ARIZONA_DEVICE_REVISION_MASK;
382
383 switch (reg) {
384 #ifdef CONFIG_MFD_WM5102
385 case 0x5102:
386 type_name = "WM5102";
387 if (arizona->type != WM5102) {
388 dev_err(arizona->dev, "WM5102 registered as %d\n",
389 arizona->type);
390 arizona->type = WM5102;
391 }
392 ret = wm5102_patch(arizona);
393 break;
394 #endif
395 #ifdef CONFIG_MFD_WM5110
396 case 0x5110:
397 type_name = "WM5110";
398 if (arizona->type != WM5110) {
399 dev_err(arizona->dev, "WM5110 registered as %d\n",
400 arizona->type);
401 arizona->type = WM5110;
402 }
403 ret = wm5110_patch(arizona);
404 break;
405 #endif
406 default:
407 dev_err(arizona->dev, "Unknown device ID %x\n", reg);
408 goto err_reset;
409 }
410
411 dev_info(dev, "%s revision %c\n", type_name, arizona->rev + 'A');
412
413 if (ret != 0)
414 dev_err(arizona->dev, "Failed to apply patch: %d\n", ret);
415
416 /* If we have a /RESET GPIO we'll already be reset */
417 if (!arizona->pdata.reset) {
418 ret = regmap_write(arizona->regmap, ARIZONA_SOFTWARE_RESET, 0);
419 if (ret != 0) {
420 dev_err(dev, "Failed to reset device: %d\n", ret);
421 goto err_reset;
422 }
423 }
424
425 ret = arizona_wait_for_boot(arizona);
426 if (ret != 0) {
427 dev_err(arizona->dev, "Device failed initial boot: %d\n", ret);
428 goto err_reset;
429 }
430
431 for (i = 0; i < ARRAY_SIZE(arizona->pdata.gpio_defaults); i++) {
432 if (!arizona->pdata.gpio_defaults[i])
433 continue;
434
435 regmap_write(arizona->regmap, ARIZONA_GPIO1_CTRL + i,
436 arizona->pdata.gpio_defaults[i]);
437 }
438
439 pm_runtime_set_autosuspend_delay(arizona->dev, 100);
440 pm_runtime_use_autosuspend(arizona->dev);
441 pm_runtime_enable(arizona->dev);
442
443 /* Chip default */
444 if (!arizona->pdata.clk32k_src)
445 arizona->pdata.clk32k_src = ARIZONA_32KZ_MCLK2;
446
447 switch (arizona->pdata.clk32k_src) {
448 case ARIZONA_32KZ_MCLK1:
449 case ARIZONA_32KZ_MCLK2:
450 regmap_update_bits(arizona->regmap, ARIZONA_CLOCK_32K_1,
451 ARIZONA_CLK_32K_SRC_MASK,
452 arizona->pdata.clk32k_src - 1);
453 break;
454 case ARIZONA_32KZ_NONE:
455 regmap_update_bits(arizona->regmap, ARIZONA_CLOCK_32K_1,
456 ARIZONA_CLK_32K_SRC_MASK, 2);
457 break;
458 default:
459 dev_err(arizona->dev, "Invalid 32kHz clock source: %d\n",
460 arizona->pdata.clk32k_src);
461 ret = -EINVAL;
462 goto err_reset;
463 }
464
465 for (i = 0; i < ARIZONA_MAX_INPUT; i++) {
466 /* Default for both is 0 so noop with defaults */
467 val = arizona->pdata.dmic_ref[i]
468 << ARIZONA_IN1_DMIC_SUP_SHIFT;
469 val |= arizona->pdata.inmode[i] << ARIZONA_IN1_MODE_SHIFT;
470
471 regmap_update_bits(arizona->regmap,
472 ARIZONA_IN1L_CONTROL + (i * 8),
473 ARIZONA_IN1_DMIC_SUP_MASK |
474 ARIZONA_IN1_MODE_MASK, val);
475 }
476
477 for (i = 0; i < ARIZONA_MAX_OUTPUT; i++) {
478 /* Default is 0 so noop with defaults */
479 if (arizona->pdata.out_mono[i])
480 val = ARIZONA_OUT1_MONO;
481 else
482 val = 0;
483
484 regmap_update_bits(arizona->regmap,
485 ARIZONA_OUTPUT_PATH_CONFIG_1L + (i * 8),
486 ARIZONA_OUT1_MONO, val);
487 }
488
489 for (i = 0; i < ARIZONA_MAX_PDM_SPK; i++) {
490 if (arizona->pdata.spk_mute[i])
491 regmap_update_bits(arizona->regmap,
492 ARIZONA_PDM_SPK1_CTRL_1 + (i * 2),
493 ARIZONA_SPK1_MUTE_ENDIAN_MASK |
494 ARIZONA_SPK1_MUTE_SEQ1_MASK,
495 arizona->pdata.spk_mute[i]);
496
497 if (arizona->pdata.spk_fmt[i])
498 regmap_update_bits(arizona->regmap,
499 ARIZONA_PDM_SPK1_CTRL_2 + (i * 2),
500 ARIZONA_SPK1_FMT_MASK,
501 arizona->pdata.spk_fmt[i]);
502 }
503
504 /* Set up for interrupts */
505 ret = arizona_irq_init(arizona);
506 if (ret != 0)
507 goto err_reset;
508
509 arizona_request_irq(arizona, ARIZONA_IRQ_CLKGEN_ERR, "CLKGEN error",
510 arizona_clkgen_err, arizona);
511 arizona_request_irq(arizona, ARIZONA_IRQ_OVERCLOCKED, "Overclocked",
512 arizona_overclocked, arizona);
513 arizona_request_irq(arizona, ARIZONA_IRQ_UNDERCLOCKED, "Underclocked",
514 arizona_underclocked, arizona);
515
516 switch (arizona->type) {
517 case WM5102:
518 ret = mfd_add_devices(arizona->dev, -1, wm5102_devs,
519 ARRAY_SIZE(wm5102_devs), NULL, 0);
520 break;
521 case WM5110:
522 ret = mfd_add_devices(arizona->dev, -1, wm5110_devs,
523 ARRAY_SIZE(wm5102_devs), NULL, 0);
524 break;
525 }
526
527 if (ret != 0) {
528 dev_err(arizona->dev, "Failed to add subdevices: %d\n", ret);
529 goto err_irq;
530 }
531
532 #ifdef CONFIG_PM_RUNTIME
533 regulator_disable(arizona->dcvdd);
534 #endif
535
536 return 0;
537
538 err_irq:
539 arizona_irq_exit(arizona);
540 err_reset:
541 if (arizona->pdata.reset) {
542 gpio_set_value_cansleep(arizona->pdata.reset, 1);
543 gpio_free(arizona->pdata.reset);
544 }
545 err_dcvdd:
546 regulator_disable(arizona->dcvdd);
547 err_enable:
548 regulator_bulk_disable(arizona->num_core_supplies,
549 arizona->core_supplies);
550 err_early:
551 mfd_remove_devices(dev);
552 return ret;
553 }
554 EXPORT_SYMBOL_GPL(arizona_dev_init);
555
556 int __devexit arizona_dev_exit(struct arizona *arizona)
557 {
558 mfd_remove_devices(arizona->dev);
559 arizona_free_irq(arizona, ARIZONA_IRQ_UNDERCLOCKED, arizona);
560 arizona_free_irq(arizona, ARIZONA_IRQ_OVERCLOCKED, arizona);
561 arizona_free_irq(arizona, ARIZONA_IRQ_CLKGEN_ERR, arizona);
562 pm_runtime_disable(arizona->dev);
563 arizona_irq_exit(arizona);
564 return 0;
565 }
566 EXPORT_SYMBOL_GPL(arizona_dev_exit);
Linux with added FPC-III support