Commit | Line | Data |
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89b4012b MB |
1 | /* |
2 | * wm8350-core.c -- Device access for Wolfson WM8350 | |
3 | * | |
4 | * Copyright 2007, 2008 Wolfson Microelectronics PLC. | |
5 | * | |
6 | * Author: Liam Girdwood, Mark Brown | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | * | |
13 | */ | |
14 | ||
15 | #include <linux/kernel.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/init.h> | |
5a0e3ad6 | 18 | #include <linux/slab.h> |
ebccec0f | 19 | #include <linux/bug.h> |
89b4012b MB |
20 | #include <linux/device.h> |
21 | #include <linux/delay.h> | |
22 | #include <linux/interrupt.h> | |
b7b142d9 | 23 | #include <linux/regmap.h> |
ebccec0f | 24 | #include <linux/workqueue.h> |
89b4012b MB |
25 | |
26 | #include <linux/mfd/wm8350/core.h> | |
27 | #include <linux/mfd/wm8350/audio.h> | |
ebccec0f | 28 | #include <linux/mfd/wm8350/comparator.h> |
89b4012b MB |
29 | #include <linux/mfd/wm8350/gpio.h> |
30 | #include <linux/mfd/wm8350/pmic.h> | |
ebccec0f | 31 | #include <linux/mfd/wm8350/rtc.h> |
89b4012b | 32 | #include <linux/mfd/wm8350/supply.h> |
ebccec0f | 33 | #include <linux/mfd/wm8350/wdt.h> |
89b4012b | 34 | |
89b4012b MB |
35 | #define WM8350_CLOCK_CONTROL_1 0x28 |
36 | #define WM8350_AIF_TEST 0x74 | |
37 | ||
38 | /* debug */ | |
39 | #define WM8350_BUS_DEBUG 0 | |
40 | #if WM8350_BUS_DEBUG | |
41 | #define dump(regs, src) do { \ | |
42 | int i_; \ | |
43 | u16 *src_ = src; \ | |
44 | printk(KERN_DEBUG); \ | |
45 | for (i_ = 0; i_ < regs; i_++) \ | |
46 | printk(" 0x%4.4x", *src_++); \ | |
47 | printk("\n"); \ | |
48 | } while (0); | |
49 | #else | |
50 | #define dump(bytes, src) | |
51 | #endif | |
52 | ||
53 | #define WM8350_LOCK_DEBUG 0 | |
54 | #if WM8350_LOCK_DEBUG | |
55 | #define ldbg(format, arg...) printk(format, ## arg) | |
56 | #else | |
57 | #define ldbg(format, arg...) | |
58 | #endif | |
59 | ||
60 | /* | |
61 | * WM8350 Device IO | |
62 | */ | |
89b4012b | 63 | static DEFINE_MUTEX(reg_lock_mutex); |
89b4012b | 64 | |
89b4012b MB |
65 | /* |
66 | * Safe read, modify, write methods | |
67 | */ | |
68 | int wm8350_clear_bits(struct wm8350 *wm8350, u16 reg, u16 mask) | |
69 | { | |
19d57ed5 | 70 | return regmap_update_bits(wm8350->regmap, reg, mask, 0); |
89b4012b MB |
71 | } |
72 | EXPORT_SYMBOL_GPL(wm8350_clear_bits); | |
73 | ||
74 | int wm8350_set_bits(struct wm8350 *wm8350, u16 reg, u16 mask) | |
75 | { | |
19d57ed5 | 76 | return regmap_update_bits(wm8350->regmap, reg, mask, mask); |
89b4012b MB |
77 | } |
78 | EXPORT_SYMBOL_GPL(wm8350_set_bits); | |
79 | ||
80 | u16 wm8350_reg_read(struct wm8350 *wm8350, int reg) | |
81 | { | |
19d57ed5 | 82 | unsigned int data; |
89b4012b MB |
83 | int err; |
84 | ||
19d57ed5 | 85 | err = regmap_read(wm8350->regmap, reg, &data); |
89b4012b MB |
86 | if (err) |
87 | dev_err(wm8350->dev, "read from reg R%d failed\n", reg); | |
88 | ||
89b4012b MB |
89 | return data; |
90 | } | |
91 | EXPORT_SYMBOL_GPL(wm8350_reg_read); | |
92 | ||
93 | int wm8350_reg_write(struct wm8350 *wm8350, int reg, u16 val) | |
94 | { | |
95 | int ret; | |
89b4012b | 96 | |
19d57ed5 MB |
97 | ret = regmap_write(wm8350->regmap, reg, val); |
98 | ||
89b4012b MB |
99 | if (ret) |
100 | dev_err(wm8350->dev, "write to reg R%d failed\n", reg); | |
89b4012b MB |
101 | return ret; |
102 | } | |
103 | EXPORT_SYMBOL_GPL(wm8350_reg_write); | |
104 | ||
105 | int wm8350_block_read(struct wm8350 *wm8350, int start_reg, int regs, | |
106 | u16 *dest) | |
107 | { | |
108 | int err = 0; | |
109 | ||
19d57ed5 | 110 | err = regmap_bulk_read(wm8350->regmap, start_reg, dest, regs); |
89b4012b MB |
111 | if (err) |
112 | dev_err(wm8350->dev, "block read starting from R%d failed\n", | |
113 | start_reg); | |
19d57ed5 | 114 | |
89b4012b MB |
115 | return err; |
116 | } | |
117 | EXPORT_SYMBOL_GPL(wm8350_block_read); | |
118 | ||
119 | int wm8350_block_write(struct wm8350 *wm8350, int start_reg, int regs, | |
120 | u16 *src) | |
121 | { | |
122 | int ret = 0; | |
123 | ||
19d57ed5 | 124 | ret = regmap_bulk_write(wm8350->regmap, start_reg, src, regs); |
89b4012b MB |
125 | if (ret) |
126 | dev_err(wm8350->dev, "block write starting at R%d failed\n", | |
127 | start_reg); | |
19d57ed5 | 128 | |
89b4012b MB |
129 | return ret; |
130 | } | |
131 | EXPORT_SYMBOL_GPL(wm8350_block_write); | |
132 | ||
858e6744 MB |
133 | /** |
134 | * wm8350_reg_lock() | |
135 | * | |
136 | * The WM8350 has a hardware lock which can be used to prevent writes to | |
137 | * some registers (generally those which can cause particularly serious | |
138 | * problems if misused). This function enables that lock. | |
139 | */ | |
89b4012b MB |
140 | int wm8350_reg_lock(struct wm8350 *wm8350) |
141 | { | |
89b4012b MB |
142 | int ret; |
143 | ||
52b461b8 MB |
144 | mutex_lock(®_lock_mutex); |
145 | ||
89b4012b | 146 | ldbg(__func__); |
52b461b8 MB |
147 | |
148 | ret = wm8350_reg_write(wm8350, WM8350_SECURITY, WM8350_LOCK_KEY); | |
89b4012b MB |
149 | if (ret) |
150 | dev_err(wm8350->dev, "lock failed\n"); | |
52b461b8 MB |
151 | |
152 | wm8350->unlocked = false; | |
153 | ||
154 | mutex_unlock(®_lock_mutex); | |
155 | ||
89b4012b MB |
156 | return ret; |
157 | } | |
158 | EXPORT_SYMBOL_GPL(wm8350_reg_lock); | |
159 | ||
858e6744 MB |
160 | /** |
161 | * wm8350_reg_unlock() | |
162 | * | |
163 | * The WM8350 has a hardware lock which can be used to prevent writes to | |
164 | * some registers (generally those which can cause particularly serious | |
165 | * problems if misused). This function disables that lock so updates | |
166 | * can be performed. For maximum safety this should be done only when | |
167 | * required. | |
168 | */ | |
89b4012b MB |
169 | int wm8350_reg_unlock(struct wm8350 *wm8350) |
170 | { | |
89b4012b MB |
171 | int ret; |
172 | ||
52b461b8 MB |
173 | mutex_lock(®_lock_mutex); |
174 | ||
89b4012b | 175 | ldbg(__func__); |
52b461b8 MB |
176 | |
177 | ret = wm8350_reg_write(wm8350, WM8350_SECURITY, WM8350_UNLOCK_KEY); | |
89b4012b MB |
178 | if (ret) |
179 | dev_err(wm8350->dev, "unlock failed\n"); | |
52b461b8 MB |
180 | |
181 | wm8350->unlocked = true; | |
182 | ||
183 | mutex_unlock(®_lock_mutex); | |
184 | ||
89b4012b MB |
185 | return ret; |
186 | } | |
187 | EXPORT_SYMBOL_GPL(wm8350_reg_unlock); | |
188 | ||
67488526 MB |
189 | int wm8350_read_auxadc(struct wm8350 *wm8350, int channel, int scale, int vref) |
190 | { | |
191 | u16 reg, result = 0; | |
67488526 MB |
192 | |
193 | if (channel < WM8350_AUXADC_AUX1 || channel > WM8350_AUXADC_TEMP) | |
194 | return -EINVAL; | |
195 | if (channel >= WM8350_AUXADC_USB && channel <= WM8350_AUXADC_TEMP | |
196 | && (scale != 0 || vref != 0)) | |
197 | return -EINVAL; | |
198 | ||
199 | mutex_lock(&wm8350->auxadc_mutex); | |
200 | ||
201 | /* Turn on the ADC */ | |
202 | reg = wm8350_reg_read(wm8350, WM8350_POWER_MGMT_5); | |
203 | wm8350_reg_write(wm8350, WM8350_POWER_MGMT_5, reg | WM8350_AUXADC_ENA); | |
204 | ||
205 | if (scale || vref) { | |
206 | reg = scale << 13; | |
207 | reg |= vref << 12; | |
208 | wm8350_reg_write(wm8350, WM8350_AUX1_READBACK + channel, reg); | |
209 | } | |
210 | ||
211 | reg = wm8350_reg_read(wm8350, WM8350_DIGITISER_CONTROL_1); | |
212 | reg |= 1 << channel | WM8350_AUXADC_POLL; | |
213 | wm8350_reg_write(wm8350, WM8350_DIGITISER_CONTROL_1, reg); | |
214 | ||
5051d411 MB |
215 | /* If a late IRQ left the completion signalled then consume |
216 | * the completion. */ | |
217 | try_wait_for_completion(&wm8350->auxadc_done); | |
218 | ||
d19663ac MB |
219 | /* We ignore the result of the completion and just check for a |
220 | * conversion result, allowing us to soldier on if the IRQ | |
221 | * infrastructure is not set up for the chip. */ | |
222 | wait_for_completion_timeout(&wm8350->auxadc_done, msecs_to_jiffies(5)); | |
67488526 | 223 | |
d19663ac MB |
224 | reg = wm8350_reg_read(wm8350, WM8350_DIGITISER_CONTROL_1); |
225 | if (reg & WM8350_AUXADC_POLL) | |
67488526 MB |
226 | dev_err(wm8350->dev, "adc chn %d read timeout\n", channel); |
227 | else | |
228 | result = wm8350_reg_read(wm8350, | |
229 | WM8350_AUX1_READBACK + channel); | |
230 | ||
231 | /* Turn off the ADC */ | |
232 | reg = wm8350_reg_read(wm8350, WM8350_POWER_MGMT_5); | |
233 | wm8350_reg_write(wm8350, WM8350_POWER_MGMT_5, | |
234 | reg & ~WM8350_AUXADC_ENA); | |
235 | ||
236 | mutex_unlock(&wm8350->auxadc_mutex); | |
237 | ||
238 | return result & WM8350_AUXADC_DATA1_MASK; | |
239 | } | |
240 | EXPORT_SYMBOL_GPL(wm8350_read_auxadc); | |
241 | ||
d19663ac MB |
242 | static irqreturn_t wm8350_auxadc_irq(int irq, void *irq_data) |
243 | { | |
244 | struct wm8350 *wm8350 = irq_data; | |
245 | ||
246 | complete(&wm8350->auxadc_done); | |
247 | ||
248 | return IRQ_HANDLED; | |
249 | } | |
250 | ||
9201d38b MB |
251 | /* |
252 | * Register a client device. This is non-fatal since there is no need to | |
253 | * fail the entire device init due to a single platform device failing. | |
254 | */ | |
255 | static void wm8350_client_dev_register(struct wm8350 *wm8350, | |
256 | const char *name, | |
257 | struct platform_device **pdev) | |
258 | { | |
259 | int ret; | |
260 | ||
261 | *pdev = platform_device_alloc(name, -1); | |
cb9b2245 | 262 | if (*pdev == NULL) { |
9201d38b MB |
263 | dev_err(wm8350->dev, "Failed to allocate %s\n", name); |
264 | return; | |
265 | } | |
266 | ||
267 | (*pdev)->dev.parent = wm8350->dev; | |
268 | platform_set_drvdata(*pdev, wm8350); | |
269 | ret = platform_device_add(*pdev); | |
270 | if (ret != 0) { | |
271 | dev_err(wm8350->dev, "Failed to register %s: %d\n", name, ret); | |
272 | platform_device_put(*pdev); | |
273 | *pdev = NULL; | |
274 | } | |
275 | } | |
276 | ||
ebccec0f | 277 | int wm8350_device_init(struct wm8350 *wm8350, int irq, |
bcdd4efc | 278 | struct wm8350_platform_data *pdata) |
89b4012b | 279 | { |
85c93ea7 | 280 | int ret; |
b7b142d9 MB |
281 | unsigned int id1, id2, mask_rev; |
282 | unsigned int cust_id, mode, chip_rev; | |
89b4012b | 283 | |
18bf50a3 MB |
284 | dev_set_drvdata(wm8350->dev, wm8350); |
285 | ||
89b4012b | 286 | /* get WM8350 revision and config mode */ |
b7b142d9 | 287 | ret = regmap_read(wm8350->regmap, WM8350_RESET_ID, &id1); |
85c93ea7 MB |
288 | if (ret != 0) { |
289 | dev_err(wm8350->dev, "Failed to read ID: %d\n", ret); | |
290 | goto err; | |
291 | } | |
292 | ||
b7b142d9 | 293 | ret = regmap_read(wm8350->regmap, WM8350_ID, &id2); |
85c93ea7 MB |
294 | if (ret != 0) { |
295 | dev_err(wm8350->dev, "Failed to read ID: %d\n", ret); | |
296 | goto err; | |
297 | } | |
298 | ||
b7b142d9 | 299 | ret = regmap_read(wm8350->regmap, WM8350_REVISION, &mask_rev); |
85c93ea7 MB |
300 | if (ret != 0) { |
301 | dev_err(wm8350->dev, "Failed to read revision: %d\n", ret); | |
302 | goto err; | |
303 | } | |
89b4012b | 304 | |
b797a555 MB |
305 | if (id1 != 0x6143) { |
306 | dev_err(wm8350->dev, | |
307 | "Device with ID %x is not a WM8350\n", id1); | |
308 | ret = -ENODEV; | |
309 | goto err; | |
310 | } | |
311 | ||
312 | mode = id2 & WM8350_CONF_STS_MASK >> 10; | |
313 | cust_id = id2 & WM8350_CUST_ID_MASK; | |
314 | chip_rev = (id2 & WM8350_CHIP_REV_MASK) >> 12; | |
315 | dev_info(wm8350->dev, | |
316 | "CONF_STS %d, CUST_ID %d, MASK_REV %d, CHIP_REV %d\n", | |
317 | mode, cust_id, mask_rev, chip_rev); | |
318 | ||
319 | if (cust_id != 0) { | |
320 | dev_err(wm8350->dev, "Unsupported CUST_ID\n"); | |
321 | ret = -ENODEV; | |
322 | goto err; | |
323 | } | |
324 | ||
325 | switch (mask_rev) { | |
326 | case 0: | |
645524a9 MB |
327 | wm8350->pmic.max_dcdc = WM8350_DCDC_6; |
328 | wm8350->pmic.max_isink = WM8350_ISINK_B; | |
329 | ||
b797a555 | 330 | switch (chip_rev) { |
89b4012b | 331 | case WM8350_REV_E: |
b797a555 | 332 | dev_info(wm8350->dev, "WM8350 Rev E\n"); |
89b4012b MB |
333 | break; |
334 | case WM8350_REV_F: | |
b797a555 | 335 | dev_info(wm8350->dev, "WM8350 Rev F\n"); |
89b4012b MB |
336 | break; |
337 | case WM8350_REV_G: | |
b797a555 | 338 | dev_info(wm8350->dev, "WM8350 Rev G\n"); |
d756f4a4 | 339 | wm8350->power.rev_g_coeff = 1; |
89b4012b | 340 | break; |
0c8a6016 | 341 | case WM8350_REV_H: |
b797a555 | 342 | dev_info(wm8350->dev, "WM8350 Rev H\n"); |
d756f4a4 | 343 | wm8350->power.rev_g_coeff = 1; |
0c8a6016 | 344 | break; |
89b4012b MB |
345 | default: |
346 | /* For safety we refuse to run on unknown hardware */ | |
b797a555 | 347 | dev_err(wm8350->dev, "Unknown WM8350 CHIP_REV\n"); |
89b4012b MB |
348 | ret = -ENODEV; |
349 | goto err; | |
350 | } | |
b797a555 MB |
351 | break; |
352 | ||
ca23f8c1 MB |
353 | case 1: |
354 | wm8350->pmic.max_dcdc = WM8350_DCDC_4; | |
355 | wm8350->pmic.max_isink = WM8350_ISINK_A; | |
356 | ||
357 | switch (chip_rev) { | |
358 | case 0: | |
359 | dev_info(wm8350->dev, "WM8351 Rev A\n"); | |
360 | wm8350->power.rev_g_coeff = 1; | |
361 | break; | |
362 | ||
02d46e07 MB |
363 | case 1: |
364 | dev_info(wm8350->dev, "WM8351 Rev B\n"); | |
365 | wm8350->power.rev_g_coeff = 1; | |
366 | break; | |
367 | ||
ca23f8c1 MB |
368 | default: |
369 | dev_err(wm8350->dev, "Unknown WM8351 CHIP_REV\n"); | |
370 | ret = -ENODEV; | |
371 | goto err; | |
372 | } | |
373 | break; | |
374 | ||
96920630 | 375 | case 2: |
645524a9 MB |
376 | wm8350->pmic.max_dcdc = WM8350_DCDC_6; |
377 | wm8350->pmic.max_isink = WM8350_ISINK_B; | |
378 | ||
96920630 MB |
379 | switch (chip_rev) { |
380 | case 0: | |
381 | dev_info(wm8350->dev, "WM8352 Rev A\n"); | |
382 | wm8350->power.rev_g_coeff = 1; | |
383 | break; | |
384 | ||
385 | default: | |
386 | dev_err(wm8350->dev, "Unknown WM8352 CHIP_REV\n"); | |
387 | ret = -ENODEV; | |
388 | goto err; | |
389 | } | |
390 | break; | |
391 | ||
b797a555 MB |
392 | default: |
393 | dev_err(wm8350->dev, "Unknown MASK_REV\n"); | |
89b4012b MB |
394 | ret = -ENODEV; |
395 | goto err; | |
396 | } | |
397 | ||
67488526 | 398 | mutex_init(&wm8350->auxadc_mutex); |
d19663ac | 399 | init_completion(&wm8350->auxadc_done); |
32064503 | 400 | |
e0a3389a MB |
401 | ret = wm8350_irq_init(wm8350, irq, pdata); |
402 | if (ret < 0) | |
19d57ed5 | 403 | goto err; |
ebccec0f | 404 | |
d19663ac MB |
405 | if (wm8350->irq_base) { |
406 | ret = request_threaded_irq(wm8350->irq_base + | |
407 | WM8350_IRQ_AUXADC_DATARDY, | |
408 | NULL, wm8350_auxadc_irq, 0, | |
409 | "auxadc", wm8350); | |
410 | if (ret < 0) | |
411 | dev_warn(wm8350->dev, | |
412 | "Failed to request AUXADC IRQ: %d\n", ret); | |
413 | } | |
414 | ||
62571c29 MB |
415 | if (pdata && pdata->init) { |
416 | ret = pdata->init(wm8350); | |
417 | if (ret != 0) { | |
418 | dev_err(wm8350->dev, "Platform init() failed: %d\n", | |
419 | ret); | |
e0a3389a | 420 | goto err_irq; |
62571c29 MB |
421 | } |
422 | } | |
423 | ||
ebccec0f MB |
424 | wm8350_reg_write(wm8350, WM8350_SYSTEM_INTERRUPTS_MASK, 0x0); |
425 | ||
add41cb4 MB |
426 | wm8350_client_dev_register(wm8350, "wm8350-codec", |
427 | &(wm8350->codec.pdev)); | |
428 | wm8350_client_dev_register(wm8350, "wm8350-gpio", | |
429 | &(wm8350->gpio.pdev)); | |
fb6c023a MB |
430 | wm8350_client_dev_register(wm8350, "wm8350-hwmon", |
431 | &(wm8350->hwmon.pdev)); | |
add41cb4 MB |
432 | wm8350_client_dev_register(wm8350, "wm8350-power", |
433 | &(wm8350->power.pdev)); | |
434 | wm8350_client_dev_register(wm8350, "wm8350-rtc", &(wm8350->rtc.pdev)); | |
435 | wm8350_client_dev_register(wm8350, "wm8350-wdt", &(wm8350->wdt.pdev)); | |
436 | ||
89b4012b MB |
437 | return 0; |
438 | ||
e0a3389a MB |
439 | err_irq: |
440 | wm8350_irq_exit(wm8350); | |
8c46cf30 | 441 | err: |
89b4012b MB |
442 | return ret; |
443 | } | |
444 | EXPORT_SYMBOL_GPL(wm8350_device_init); | |
445 | ||
446 | void wm8350_device_exit(struct wm8350 *wm8350) | |
447 | { | |
da09155a MB |
448 | int i; |
449 | ||
0081e802 MB |
450 | for (i = 0; i < ARRAY_SIZE(wm8350->pmic.led); i++) |
451 | platform_device_unregister(wm8350->pmic.led[i].pdev); | |
452 | ||
da09155a | 453 | for (i = 0; i < ARRAY_SIZE(wm8350->pmic.pdev); i++) |
add41cb4 MB |
454 | platform_device_unregister(wm8350->pmic.pdev[i]); |
455 | ||
456 | platform_device_unregister(wm8350->wdt.pdev); | |
457 | platform_device_unregister(wm8350->rtc.pdev); | |
458 | platform_device_unregister(wm8350->power.pdev); | |
fb6c023a | 459 | platform_device_unregister(wm8350->hwmon.pdev); |
add41cb4 MB |
460 | platform_device_unregister(wm8350->gpio.pdev); |
461 | platform_device_unregister(wm8350->codec.pdev); | |
da09155a | 462 | |
d19663ac MB |
463 | if (wm8350->irq_base) |
464 | free_irq(wm8350->irq_base + WM8350_IRQ_AUXADC_DATARDY, wm8350); | |
465 | ||
e0a3389a | 466 | wm8350_irq_exit(wm8350); |
89b4012b MB |
467 | } |
468 | EXPORT_SYMBOL_GPL(wm8350_device_exit); | |
469 | ||
ebccec0f | 470 | MODULE_DESCRIPTION("WM8350 AudioPlus PMIC core driver"); |
89b4012b | 471 | MODULE_LICENSE("GPL"); |