Commit | Line | Data |
---|---|---|
2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
89b4012b MB |
2 | /* |
3 | * wm8350-core.c -- Device access for Wolfson WM8350 | |
4 | * | |
5 | * Copyright 2007, 2008 Wolfson Microelectronics PLC. | |
6 | * | |
7 | * Author: Liam Girdwood, Mark Brown | |
89b4012b MB |
8 | */ |
9 | ||
10 | #include <linux/kernel.h> | |
0db88688 PG |
11 | #include <linux/init.h> |
12 | #include <linux/export.h> | |
5a0e3ad6 | 13 | #include <linux/slab.h> |
ebccec0f | 14 | #include <linux/bug.h> |
89b4012b MB |
15 | #include <linux/device.h> |
16 | #include <linux/delay.h> | |
17 | #include <linux/interrupt.h> | |
b7b142d9 | 18 | #include <linux/regmap.h> |
ebccec0f | 19 | #include <linux/workqueue.h> |
89b4012b MB |
20 | |
21 | #include <linux/mfd/wm8350/core.h> | |
22 | #include <linux/mfd/wm8350/audio.h> | |
ebccec0f | 23 | #include <linux/mfd/wm8350/comparator.h> |
89b4012b MB |
24 | #include <linux/mfd/wm8350/gpio.h> |
25 | #include <linux/mfd/wm8350/pmic.h> | |
ebccec0f | 26 | #include <linux/mfd/wm8350/rtc.h> |
89b4012b | 27 | #include <linux/mfd/wm8350/supply.h> |
ebccec0f | 28 | #include <linux/mfd/wm8350/wdt.h> |
89b4012b | 29 | |
89b4012b MB |
30 | #define WM8350_CLOCK_CONTROL_1 0x28 |
31 | #define WM8350_AIF_TEST 0x74 | |
32 | ||
33 | /* debug */ | |
34 | #define WM8350_BUS_DEBUG 0 | |
35 | #if WM8350_BUS_DEBUG | |
36 | #define dump(regs, src) do { \ | |
37 | int i_; \ | |
38 | u16 *src_ = src; \ | |
39 | printk(KERN_DEBUG); \ | |
40 | for (i_ = 0; i_ < regs; i_++) \ | |
41 | printk(" 0x%4.4x", *src_++); \ | |
42 | printk("\n"); \ | |
43 | } while (0); | |
44 | #else | |
45 | #define dump(bytes, src) | |
46 | #endif | |
47 | ||
48 | #define WM8350_LOCK_DEBUG 0 | |
49 | #if WM8350_LOCK_DEBUG | |
50 | #define ldbg(format, arg...) printk(format, ## arg) | |
51 | #else | |
52 | #define ldbg(format, arg...) | |
53 | #endif | |
54 | ||
55 | /* | |
56 | * WM8350 Device IO | |
57 | */ | |
89b4012b | 58 | static DEFINE_MUTEX(reg_lock_mutex); |
89b4012b | 59 | |
89b4012b MB |
60 | /* |
61 | * Safe read, modify, write methods | |
62 | */ | |
63 | int wm8350_clear_bits(struct wm8350 *wm8350, u16 reg, u16 mask) | |
64 | { | |
19d57ed5 | 65 | return regmap_update_bits(wm8350->regmap, reg, mask, 0); |
89b4012b MB |
66 | } |
67 | EXPORT_SYMBOL_GPL(wm8350_clear_bits); | |
68 | ||
69 | int wm8350_set_bits(struct wm8350 *wm8350, u16 reg, u16 mask) | |
70 | { | |
19d57ed5 | 71 | return regmap_update_bits(wm8350->regmap, reg, mask, mask); |
89b4012b MB |
72 | } |
73 | EXPORT_SYMBOL_GPL(wm8350_set_bits); | |
74 | ||
75 | u16 wm8350_reg_read(struct wm8350 *wm8350, int reg) | |
76 | { | |
19d57ed5 | 77 | unsigned int data; |
89b4012b MB |
78 | int err; |
79 | ||
19d57ed5 | 80 | err = regmap_read(wm8350->regmap, reg, &data); |
89b4012b MB |
81 | if (err) |
82 | dev_err(wm8350->dev, "read from reg R%d failed\n", reg); | |
83 | ||
89b4012b MB |
84 | return data; |
85 | } | |
86 | EXPORT_SYMBOL_GPL(wm8350_reg_read); | |
87 | ||
88 | int wm8350_reg_write(struct wm8350 *wm8350, int reg, u16 val) | |
89 | { | |
90 | int ret; | |
89b4012b | 91 | |
19d57ed5 MB |
92 | ret = regmap_write(wm8350->regmap, reg, val); |
93 | ||
89b4012b MB |
94 | if (ret) |
95 | dev_err(wm8350->dev, "write to reg R%d failed\n", reg); | |
89b4012b MB |
96 | return ret; |
97 | } | |
98 | EXPORT_SYMBOL_GPL(wm8350_reg_write); | |
99 | ||
100 | int wm8350_block_read(struct wm8350 *wm8350, int start_reg, int regs, | |
101 | u16 *dest) | |
102 | { | |
103 | int err = 0; | |
104 | ||
19d57ed5 | 105 | err = regmap_bulk_read(wm8350->regmap, start_reg, dest, regs); |
89b4012b MB |
106 | if (err) |
107 | dev_err(wm8350->dev, "block read starting from R%d failed\n", | |
108 | start_reg); | |
19d57ed5 | 109 | |
89b4012b MB |
110 | return err; |
111 | } | |
112 | EXPORT_SYMBOL_GPL(wm8350_block_read); | |
113 | ||
114 | int wm8350_block_write(struct wm8350 *wm8350, int start_reg, int regs, | |
115 | u16 *src) | |
116 | { | |
117 | int ret = 0; | |
118 | ||
19d57ed5 | 119 | ret = regmap_bulk_write(wm8350->regmap, start_reg, src, regs); |
89b4012b MB |
120 | if (ret) |
121 | dev_err(wm8350->dev, "block write starting at R%d failed\n", | |
122 | start_reg); | |
19d57ed5 | 123 | |
89b4012b MB |
124 | return ret; |
125 | } | |
126 | EXPORT_SYMBOL_GPL(wm8350_block_write); | |
127 | ||
858e6744 MB |
128 | /** |
129 | * wm8350_reg_lock() | |
130 | * | |
131 | * The WM8350 has a hardware lock which can be used to prevent writes to | |
132 | * some registers (generally those which can cause particularly serious | |
133 | * problems if misused). This function enables that lock. | |
134 | */ | |
89b4012b MB |
135 | int wm8350_reg_lock(struct wm8350 *wm8350) |
136 | { | |
89b4012b MB |
137 | int ret; |
138 | ||
52b461b8 MB |
139 | mutex_lock(®_lock_mutex); |
140 | ||
89b4012b | 141 | ldbg(__func__); |
52b461b8 MB |
142 | |
143 | ret = wm8350_reg_write(wm8350, WM8350_SECURITY, WM8350_LOCK_KEY); | |
89b4012b MB |
144 | if (ret) |
145 | dev_err(wm8350->dev, "lock failed\n"); | |
52b461b8 MB |
146 | |
147 | wm8350->unlocked = false; | |
148 | ||
149 | mutex_unlock(®_lock_mutex); | |
150 | ||
89b4012b MB |
151 | return ret; |
152 | } | |
153 | EXPORT_SYMBOL_GPL(wm8350_reg_lock); | |
154 | ||
858e6744 MB |
155 | /** |
156 | * wm8350_reg_unlock() | |
157 | * | |
158 | * The WM8350 has a hardware lock which can be used to prevent writes to | |
159 | * some registers (generally those which can cause particularly serious | |
160 | * problems if misused). This function disables that lock so updates | |
161 | * can be performed. For maximum safety this should be done only when | |
162 | * required. | |
163 | */ | |
89b4012b MB |
164 | int wm8350_reg_unlock(struct wm8350 *wm8350) |
165 | { | |
89b4012b MB |
166 | int ret; |
167 | ||
52b461b8 MB |
168 | mutex_lock(®_lock_mutex); |
169 | ||
89b4012b | 170 | ldbg(__func__); |
52b461b8 MB |
171 | |
172 | ret = wm8350_reg_write(wm8350, WM8350_SECURITY, WM8350_UNLOCK_KEY); | |
89b4012b MB |
173 | if (ret) |
174 | dev_err(wm8350->dev, "unlock failed\n"); | |
52b461b8 MB |
175 | |
176 | wm8350->unlocked = true; | |
177 | ||
178 | mutex_unlock(®_lock_mutex); | |
179 | ||
89b4012b MB |
180 | return ret; |
181 | } | |
182 | EXPORT_SYMBOL_GPL(wm8350_reg_unlock); | |
183 | ||
67488526 MB |
184 | int wm8350_read_auxadc(struct wm8350 *wm8350, int channel, int scale, int vref) |
185 | { | |
186 | u16 reg, result = 0; | |
67488526 MB |
187 | |
188 | if (channel < WM8350_AUXADC_AUX1 || channel > WM8350_AUXADC_TEMP) | |
189 | return -EINVAL; | |
190 | if (channel >= WM8350_AUXADC_USB && channel <= WM8350_AUXADC_TEMP | |
191 | && (scale != 0 || vref != 0)) | |
192 | return -EINVAL; | |
193 | ||
194 | mutex_lock(&wm8350->auxadc_mutex); | |
195 | ||
196 | /* Turn on the ADC */ | |
197 | reg = wm8350_reg_read(wm8350, WM8350_POWER_MGMT_5); | |
198 | wm8350_reg_write(wm8350, WM8350_POWER_MGMT_5, reg | WM8350_AUXADC_ENA); | |
199 | ||
200 | if (scale || vref) { | |
201 | reg = scale << 13; | |
202 | reg |= vref << 12; | |
203 | wm8350_reg_write(wm8350, WM8350_AUX1_READBACK + channel, reg); | |
204 | } | |
205 | ||
206 | reg = wm8350_reg_read(wm8350, WM8350_DIGITISER_CONTROL_1); | |
207 | reg |= 1 << channel | WM8350_AUXADC_POLL; | |
208 | wm8350_reg_write(wm8350, WM8350_DIGITISER_CONTROL_1, reg); | |
209 | ||
5051d411 MB |
210 | /* If a late IRQ left the completion signalled then consume |
211 | * the completion. */ | |
212 | try_wait_for_completion(&wm8350->auxadc_done); | |
213 | ||
d19663ac MB |
214 | /* We ignore the result of the completion and just check for a |
215 | * conversion result, allowing us to soldier on if the IRQ | |
216 | * infrastructure is not set up for the chip. */ | |
217 | wait_for_completion_timeout(&wm8350->auxadc_done, msecs_to_jiffies(5)); | |
67488526 | 218 | |
d19663ac MB |
219 | reg = wm8350_reg_read(wm8350, WM8350_DIGITISER_CONTROL_1); |
220 | if (reg & WM8350_AUXADC_POLL) | |
67488526 MB |
221 | dev_err(wm8350->dev, "adc chn %d read timeout\n", channel); |
222 | else | |
223 | result = wm8350_reg_read(wm8350, | |
224 | WM8350_AUX1_READBACK + channel); | |
225 | ||
226 | /* Turn off the ADC */ | |
227 | reg = wm8350_reg_read(wm8350, WM8350_POWER_MGMT_5); | |
228 | wm8350_reg_write(wm8350, WM8350_POWER_MGMT_5, | |
229 | reg & ~WM8350_AUXADC_ENA); | |
230 | ||
231 | mutex_unlock(&wm8350->auxadc_mutex); | |
232 | ||
233 | return result & WM8350_AUXADC_DATA1_MASK; | |
234 | } | |
235 | EXPORT_SYMBOL_GPL(wm8350_read_auxadc); | |
236 | ||
d19663ac MB |
237 | static irqreturn_t wm8350_auxadc_irq(int irq, void *irq_data) |
238 | { | |
239 | struct wm8350 *wm8350 = irq_data; | |
240 | ||
241 | complete(&wm8350->auxadc_done); | |
242 | ||
243 | return IRQ_HANDLED; | |
244 | } | |
245 | ||
9201d38b MB |
246 | /* |
247 | * Register a client device. This is non-fatal since there is no need to | |
248 | * fail the entire device init due to a single platform device failing. | |
249 | */ | |
250 | static void wm8350_client_dev_register(struct wm8350 *wm8350, | |
251 | const char *name, | |
252 | struct platform_device **pdev) | |
253 | { | |
254 | int ret; | |
255 | ||
256 | *pdev = platform_device_alloc(name, -1); | |
cb9b2245 | 257 | if (*pdev == NULL) { |
9201d38b MB |
258 | dev_err(wm8350->dev, "Failed to allocate %s\n", name); |
259 | return; | |
260 | } | |
261 | ||
262 | (*pdev)->dev.parent = wm8350->dev; | |
263 | platform_set_drvdata(*pdev, wm8350); | |
264 | ret = platform_device_add(*pdev); | |
265 | if (ret != 0) { | |
266 | dev_err(wm8350->dev, "Failed to register %s: %d\n", name, ret); | |
267 | platform_device_put(*pdev); | |
268 | *pdev = NULL; | |
269 | } | |
270 | } | |
271 | ||
ebccec0f | 272 | int wm8350_device_init(struct wm8350 *wm8350, int irq, |
bcdd4efc | 273 | struct wm8350_platform_data *pdata) |
89b4012b | 274 | { |
85c93ea7 | 275 | int ret; |
b7b142d9 MB |
276 | unsigned int id1, id2, mask_rev; |
277 | unsigned int cust_id, mode, chip_rev; | |
89b4012b | 278 | |
18bf50a3 MB |
279 | dev_set_drvdata(wm8350->dev, wm8350); |
280 | ||
89b4012b | 281 | /* get WM8350 revision and config mode */ |
b7b142d9 | 282 | ret = regmap_read(wm8350->regmap, WM8350_RESET_ID, &id1); |
85c93ea7 MB |
283 | if (ret != 0) { |
284 | dev_err(wm8350->dev, "Failed to read ID: %d\n", ret); | |
285 | goto err; | |
286 | } | |
287 | ||
b7b142d9 | 288 | ret = regmap_read(wm8350->regmap, WM8350_ID, &id2); |
85c93ea7 MB |
289 | if (ret != 0) { |
290 | dev_err(wm8350->dev, "Failed to read ID: %d\n", ret); | |
291 | goto err; | |
292 | } | |
293 | ||
b7b142d9 | 294 | ret = regmap_read(wm8350->regmap, WM8350_REVISION, &mask_rev); |
85c93ea7 MB |
295 | if (ret != 0) { |
296 | dev_err(wm8350->dev, "Failed to read revision: %d\n", ret); | |
297 | goto err; | |
298 | } | |
89b4012b | 299 | |
b797a555 MB |
300 | if (id1 != 0x6143) { |
301 | dev_err(wm8350->dev, | |
302 | "Device with ID %x is not a WM8350\n", id1); | |
303 | ret = -ENODEV; | |
304 | goto err; | |
305 | } | |
306 | ||
1753b40f | 307 | mode = (id2 & WM8350_CONF_STS_MASK) >> 10; |
b797a555 MB |
308 | cust_id = id2 & WM8350_CUST_ID_MASK; |
309 | chip_rev = (id2 & WM8350_CHIP_REV_MASK) >> 12; | |
310 | dev_info(wm8350->dev, | |
311 | "CONF_STS %d, CUST_ID %d, MASK_REV %d, CHIP_REV %d\n", | |
312 | mode, cust_id, mask_rev, chip_rev); | |
313 | ||
314 | if (cust_id != 0) { | |
315 | dev_err(wm8350->dev, "Unsupported CUST_ID\n"); | |
316 | ret = -ENODEV; | |
317 | goto err; | |
318 | } | |
319 | ||
320 | switch (mask_rev) { | |
321 | case 0: | |
645524a9 MB |
322 | wm8350->pmic.max_dcdc = WM8350_DCDC_6; |
323 | wm8350->pmic.max_isink = WM8350_ISINK_B; | |
324 | ||
b797a555 | 325 | switch (chip_rev) { |
89b4012b | 326 | case WM8350_REV_E: |
b797a555 | 327 | dev_info(wm8350->dev, "WM8350 Rev E\n"); |
89b4012b MB |
328 | break; |
329 | case WM8350_REV_F: | |
b797a555 | 330 | dev_info(wm8350->dev, "WM8350 Rev F\n"); |
89b4012b MB |
331 | break; |
332 | case WM8350_REV_G: | |
b797a555 | 333 | dev_info(wm8350->dev, "WM8350 Rev G\n"); |
d756f4a4 | 334 | wm8350->power.rev_g_coeff = 1; |
89b4012b | 335 | break; |
0c8a6016 | 336 | case WM8350_REV_H: |
b797a555 | 337 | dev_info(wm8350->dev, "WM8350 Rev H\n"); |
d756f4a4 | 338 | wm8350->power.rev_g_coeff = 1; |
0c8a6016 | 339 | break; |
89b4012b MB |
340 | default: |
341 | /* For safety we refuse to run on unknown hardware */ | |
b797a555 | 342 | dev_err(wm8350->dev, "Unknown WM8350 CHIP_REV\n"); |
89b4012b MB |
343 | ret = -ENODEV; |
344 | goto err; | |
345 | } | |
b797a555 MB |
346 | break; |
347 | ||
ca23f8c1 MB |
348 | case 1: |
349 | wm8350->pmic.max_dcdc = WM8350_DCDC_4; | |
350 | wm8350->pmic.max_isink = WM8350_ISINK_A; | |
351 | ||
352 | switch (chip_rev) { | |
353 | case 0: | |
354 | dev_info(wm8350->dev, "WM8351 Rev A\n"); | |
355 | wm8350->power.rev_g_coeff = 1; | |
356 | break; | |
357 | ||
02d46e07 MB |
358 | case 1: |
359 | dev_info(wm8350->dev, "WM8351 Rev B\n"); | |
360 | wm8350->power.rev_g_coeff = 1; | |
361 | break; | |
362 | ||
ca23f8c1 MB |
363 | default: |
364 | dev_err(wm8350->dev, "Unknown WM8351 CHIP_REV\n"); | |
365 | ret = -ENODEV; | |
366 | goto err; | |
367 | } | |
368 | break; | |
369 | ||
96920630 | 370 | case 2: |
645524a9 MB |
371 | wm8350->pmic.max_dcdc = WM8350_DCDC_6; |
372 | wm8350->pmic.max_isink = WM8350_ISINK_B; | |
373 | ||
96920630 MB |
374 | switch (chip_rev) { |
375 | case 0: | |
376 | dev_info(wm8350->dev, "WM8352 Rev A\n"); | |
377 | wm8350->power.rev_g_coeff = 1; | |
378 | break; | |
379 | ||
380 | default: | |
381 | dev_err(wm8350->dev, "Unknown WM8352 CHIP_REV\n"); | |
382 | ret = -ENODEV; | |
383 | goto err; | |
384 | } | |
385 | break; | |
386 | ||
b797a555 MB |
387 | default: |
388 | dev_err(wm8350->dev, "Unknown MASK_REV\n"); | |
89b4012b MB |
389 | ret = -ENODEV; |
390 | goto err; | |
391 | } | |
392 | ||
67488526 | 393 | mutex_init(&wm8350->auxadc_mutex); |
d19663ac | 394 | init_completion(&wm8350->auxadc_done); |
32064503 | 395 | |
e0a3389a MB |
396 | ret = wm8350_irq_init(wm8350, irq, pdata); |
397 | if (ret < 0) | |
19d57ed5 | 398 | goto err; |
ebccec0f | 399 | |
d19663ac MB |
400 | if (wm8350->irq_base) { |
401 | ret = request_threaded_irq(wm8350->irq_base + | |
402 | WM8350_IRQ_AUXADC_DATARDY, | |
b3c8c82b FE |
403 | NULL, wm8350_auxadc_irq, |
404 | IRQF_ONESHOT, | |
d19663ac MB |
405 | "auxadc", wm8350); |
406 | if (ret < 0) | |
407 | dev_warn(wm8350->dev, | |
408 | "Failed to request AUXADC IRQ: %d\n", ret); | |
409 | } | |
410 | ||
62571c29 MB |
411 | if (pdata && pdata->init) { |
412 | ret = pdata->init(wm8350); | |
413 | if (ret != 0) { | |
414 | dev_err(wm8350->dev, "Platform init() failed: %d\n", | |
415 | ret); | |
e0a3389a | 416 | goto err_irq; |
62571c29 MB |
417 | } |
418 | } | |
419 | ||
ebccec0f MB |
420 | wm8350_reg_write(wm8350, WM8350_SYSTEM_INTERRUPTS_MASK, 0x0); |
421 | ||
add41cb4 MB |
422 | wm8350_client_dev_register(wm8350, "wm8350-codec", |
423 | &(wm8350->codec.pdev)); | |
424 | wm8350_client_dev_register(wm8350, "wm8350-gpio", | |
425 | &(wm8350->gpio.pdev)); | |
fb6c023a MB |
426 | wm8350_client_dev_register(wm8350, "wm8350-hwmon", |
427 | &(wm8350->hwmon.pdev)); | |
add41cb4 MB |
428 | wm8350_client_dev_register(wm8350, "wm8350-power", |
429 | &(wm8350->power.pdev)); | |
430 | wm8350_client_dev_register(wm8350, "wm8350-rtc", &(wm8350->rtc.pdev)); | |
431 | wm8350_client_dev_register(wm8350, "wm8350-wdt", &(wm8350->wdt.pdev)); | |
432 | ||
89b4012b MB |
433 | return 0; |
434 | ||
e0a3389a MB |
435 | err_irq: |
436 | wm8350_irq_exit(wm8350); | |
8c46cf30 | 437 | err: |
89b4012b MB |
438 | return ret; |
439 | } | |
440 | EXPORT_SYMBOL_GPL(wm8350_device_init); |