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1 | /* |
2 | * wm2000.c -- WM2000 ALSA Soc Audio driver | |
3 | * | |
4 | * Copyright 2008-2010 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 | * The download image for the WM2000 will be requested as | |
13 | * 'wm2000_anc.bin' by default (overridable via platform data) at | |
14 | * runtime and is expected to be in flat binary format. This is | |
15 | * generated by Wolfson configuration tools and includes | |
16 | * system-specific callibration information. If supplied as a | |
17 | * sequence of ASCII-encoded hexidecimal bytes this can be converted | |
18 | * into a flat binary with a command such as this on the command line: | |
19 | * | |
20 | * perl -e 'while (<>) { s/[\r\n]+// ; printf("%c", hex($_)); }' | |
21 | * < file > wm2000_anc.bin | |
22 | */ | |
23 | ||
24 | #include <linux/module.h> | |
25 | #include <linux/moduleparam.h> | |
3a66d387 MB |
26 | #include <linux/kernel.h> |
27 | #include <linux/init.h> | |
28 | #include <linux/firmware.h> | |
29 | #include <linux/delay.h> | |
30 | #include <linux/pm.h> | |
31 | #include <linux/i2c.h> | |
32 | #include <linux/platform_device.h> | |
33 | #include <linux/debugfs.h> | |
5a0e3ad6 | 34 | #include <linux/slab.h> |
3a66d387 MB |
35 | #include <sound/core.h> |
36 | #include <sound/pcm.h> | |
37 | #include <sound/pcm_params.h> | |
38 | #include <sound/soc.h> | |
39 | #include <sound/soc-dapm.h> | |
40 | #include <sound/initval.h> | |
41 | #include <sound/tlv.h> | |
42 | ||
43 | #include <sound/wm2000.h> | |
44 | ||
45 | #include "wm2000.h" | |
46 | ||
47 | enum wm2000_anc_mode { | |
48 | ANC_ACTIVE = 0, | |
49 | ANC_BYPASS = 1, | |
50 | ANC_STANDBY = 2, | |
51 | ANC_OFF = 3, | |
52 | }; | |
53 | ||
54 | struct wm2000_priv { | |
55 | struct i2c_client *i2c; | |
56 | ||
57 | enum wm2000_anc_mode anc_mode; | |
58 | ||
59 | unsigned int anc_active:1; | |
60 | unsigned int anc_eng_ena:1; | |
61 | unsigned int spk_ena:1; | |
62 | ||
63 | unsigned int mclk_div:1; | |
64 | unsigned int speech_clarity:1; | |
65 | ||
66 | int anc_download_size; | |
67 | char *anc_download; | |
68 | }; | |
69 | ||
70 | static struct i2c_client *wm2000_i2c; | |
71 | ||
72 | static int wm2000_write(struct i2c_client *i2c, unsigned int reg, | |
73 | unsigned int value) | |
74 | { | |
75 | u8 data[3]; | |
76 | int ret; | |
77 | ||
78 | data[0] = (reg >> 8) & 0xff; | |
79 | data[1] = reg & 0xff; | |
80 | data[2] = value & 0xff; | |
81 | ||
82 | dev_vdbg(&i2c->dev, "write %x = %x\n", reg, value); | |
83 | ||
84 | ret = i2c_master_send(i2c, data, 3); | |
85 | if (ret == 3) | |
86 | return 0; | |
87 | if (ret < 0) | |
88 | return ret; | |
89 | else | |
90 | return -EIO; | |
91 | } | |
92 | ||
93 | static unsigned int wm2000_read(struct i2c_client *i2c, unsigned int r) | |
94 | { | |
95 | struct i2c_msg xfer[2]; | |
96 | u8 reg[2]; | |
97 | u8 data; | |
98 | int ret; | |
99 | ||
100 | /* Write register */ | |
101 | reg[0] = (r >> 8) & 0xff; | |
102 | reg[1] = r & 0xff; | |
103 | xfer[0].addr = i2c->addr; | |
104 | xfer[0].flags = 0; | |
105 | xfer[0].len = sizeof(reg); | |
106 | xfer[0].buf = ®[0]; | |
107 | ||
108 | /* Read data */ | |
109 | xfer[1].addr = i2c->addr; | |
110 | xfer[1].flags = I2C_M_RD; | |
111 | xfer[1].len = 1; | |
112 | xfer[1].buf = &data; | |
113 | ||
114 | ret = i2c_transfer(i2c->adapter, xfer, 2); | |
115 | if (ret != 2) { | |
116 | dev_err(&i2c->dev, "i2c_transfer() returned %d\n", ret); | |
117 | return 0; | |
118 | } | |
119 | ||
120 | dev_vdbg(&i2c->dev, "read %x from %x\n", data, r); | |
121 | ||
122 | return data; | |
123 | } | |
124 | ||
125 | static void wm2000_reset(struct wm2000_priv *wm2000) | |
126 | { | |
127 | struct i2c_client *i2c = wm2000->i2c; | |
128 | ||
129 | wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR); | |
130 | wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR); | |
131 | wm2000_write(i2c, WM2000_REG_ID1, 0); | |
132 | ||
133 | wm2000->anc_mode = ANC_OFF; | |
134 | } | |
135 | ||
136 | static int wm2000_poll_bit(struct i2c_client *i2c, | |
137 | unsigned int reg, u8 mask, int timeout) | |
138 | { | |
139 | int val; | |
140 | ||
141 | val = wm2000_read(i2c, reg); | |
142 | ||
143 | while (!(val & mask) && --timeout) { | |
144 | msleep(1); | |
145 | val = wm2000_read(i2c, reg); | |
146 | } | |
147 | ||
148 | if (timeout == 0) | |
149 | return 0; | |
150 | else | |
151 | return 1; | |
152 | } | |
153 | ||
154 | static int wm2000_power_up(struct i2c_client *i2c, int analogue) | |
155 | { | |
156 | struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); | |
157 | int ret, timeout; | |
158 | ||
159 | BUG_ON(wm2000->anc_mode != ANC_OFF); | |
160 | ||
161 | dev_dbg(&i2c->dev, "Beginning power up\n"); | |
162 | ||
163 | if (!wm2000->mclk_div) { | |
164 | dev_dbg(&i2c->dev, "Disabling MCLK divider\n"); | |
165 | wm2000_write(i2c, WM2000_REG_SYS_CTL2, | |
166 | WM2000_MCLK_DIV2_ENA_CLR); | |
167 | } else { | |
168 | dev_dbg(&i2c->dev, "Enabling MCLK divider\n"); | |
169 | wm2000_write(i2c, WM2000_REG_SYS_CTL2, | |
170 | WM2000_MCLK_DIV2_ENA_SET); | |
171 | } | |
172 | ||
173 | wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR); | |
174 | wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_SET); | |
175 | ||
176 | /* Wait for ANC engine to become ready */ | |
177 | if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT, | |
178 | WM2000_ANC_ENG_IDLE, 1)) { | |
179 | dev_err(&i2c->dev, "ANC engine failed to reset\n"); | |
180 | return -ETIMEDOUT; | |
181 | } | |
182 | ||
183 | if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS, | |
184 | WM2000_STATUS_BOOT_COMPLETE, 1)) { | |
185 | dev_err(&i2c->dev, "ANC engine failed to initialise\n"); | |
186 | return -ETIMEDOUT; | |
187 | } | |
188 | ||
189 | wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET); | |
190 | ||
191 | /* Open code download of the data since it is the only bulk | |
192 | * write we do. */ | |
193 | dev_dbg(&i2c->dev, "Downloading %d bytes\n", | |
194 | wm2000->anc_download_size - 2); | |
195 | ||
196 | ret = i2c_master_send(i2c, wm2000->anc_download, | |
197 | wm2000->anc_download_size); | |
198 | if (ret < 0) { | |
199 | dev_err(&i2c->dev, "i2c_transfer() failed: %d\n", ret); | |
200 | return ret; | |
201 | } | |
202 | if (ret != wm2000->anc_download_size) { | |
203 | dev_err(&i2c->dev, "i2c_transfer() failed, %d != %d\n", | |
204 | ret, wm2000->anc_download_size); | |
205 | return -EIO; | |
206 | } | |
207 | ||
208 | dev_dbg(&i2c->dev, "Download complete\n"); | |
209 | ||
210 | if (analogue) { | |
211 | timeout = 248; | |
212 | wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, timeout / 4); | |
213 | ||
214 | wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, | |
215 | WM2000_MODE_ANA_SEQ_INCLUDE | | |
216 | WM2000_MODE_MOUSE_ENABLE | | |
217 | WM2000_MODE_THERMAL_ENABLE); | |
218 | } else { | |
219 | timeout = 10; | |
220 | ||
221 | wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, | |
222 | WM2000_MODE_MOUSE_ENABLE | | |
223 | WM2000_MODE_THERMAL_ENABLE); | |
224 | } | |
225 | ||
226 | ret = wm2000_read(i2c, WM2000_REG_SPEECH_CLARITY); | |
227 | if (wm2000->speech_clarity) | |
228 | ret &= ~WM2000_SPEECH_CLARITY; | |
229 | else | |
230 | ret |= WM2000_SPEECH_CLARITY; | |
231 | wm2000_write(i2c, WM2000_REG_SPEECH_CLARITY, ret); | |
232 | ||
233 | wm2000_write(i2c, WM2000_REG_SYS_START0, 0x33); | |
234 | wm2000_write(i2c, WM2000_REG_SYS_START1, 0x02); | |
235 | ||
236 | wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR); | |
237 | ||
238 | if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS, | |
239 | WM2000_STATUS_MOUSE_ACTIVE, timeout)) { | |
240 | dev_err(&i2c->dev, "Timed out waiting for device after %dms\n", | |
241 | timeout * 10); | |
242 | return -ETIMEDOUT; | |
243 | } | |
244 | ||
245 | dev_dbg(&i2c->dev, "ANC active\n"); | |
246 | if (analogue) | |
247 | dev_dbg(&i2c->dev, "Analogue active\n"); | |
248 | wm2000->anc_mode = ANC_ACTIVE; | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
253 | static int wm2000_power_down(struct i2c_client *i2c, int analogue) | |
254 | { | |
255 | struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); | |
256 | int timeout; | |
257 | ||
258 | if (analogue) { | |
259 | timeout = 248; | |
260 | wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, timeout / 4); | |
261 | wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, | |
262 | WM2000_MODE_ANA_SEQ_INCLUDE | | |
263 | WM2000_MODE_POWER_DOWN); | |
264 | } else { | |
265 | timeout = 10; | |
266 | wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, | |
267 | WM2000_MODE_POWER_DOWN); | |
268 | } | |
269 | ||
270 | if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS, | |
271 | WM2000_STATUS_POWER_DOWN_COMPLETE, timeout)) { | |
272 | dev_err(&i2c->dev, "Timeout waiting for ANC power down\n"); | |
273 | return -ETIMEDOUT; | |
274 | } | |
275 | ||
276 | if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT, | |
277 | WM2000_ANC_ENG_IDLE, 1)) { | |
278 | dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n"); | |
279 | return -ETIMEDOUT; | |
280 | } | |
281 | ||
282 | dev_dbg(&i2c->dev, "powered off\n"); | |
283 | wm2000->anc_mode = ANC_OFF; | |
284 | ||
285 | return 0; | |
286 | } | |
287 | ||
288 | static int wm2000_enter_bypass(struct i2c_client *i2c, int analogue) | |
289 | { | |
290 | struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); | |
291 | ||
292 | BUG_ON(wm2000->anc_mode != ANC_ACTIVE); | |
293 | ||
294 | if (analogue) { | |
295 | wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, | |
296 | WM2000_MODE_ANA_SEQ_INCLUDE | | |
297 | WM2000_MODE_THERMAL_ENABLE | | |
298 | WM2000_MODE_BYPASS_ENTRY); | |
299 | } else { | |
300 | wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, | |
301 | WM2000_MODE_THERMAL_ENABLE | | |
302 | WM2000_MODE_BYPASS_ENTRY); | |
303 | } | |
304 | ||
305 | if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS, | |
306 | WM2000_STATUS_ANC_DISABLED, 10)) { | |
307 | dev_err(&i2c->dev, "Timeout waiting for ANC disable\n"); | |
308 | return -ETIMEDOUT; | |
309 | } | |
310 | ||
311 | if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT, | |
312 | WM2000_ANC_ENG_IDLE, 1)) { | |
313 | dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n"); | |
314 | return -ETIMEDOUT; | |
315 | } | |
316 | ||
317 | wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY); | |
318 | wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR); | |
319 | ||
320 | wm2000->anc_mode = ANC_BYPASS; | |
321 | dev_dbg(&i2c->dev, "bypass enabled\n"); | |
322 | ||
323 | return 0; | |
324 | } | |
325 | ||
326 | static int wm2000_exit_bypass(struct i2c_client *i2c, int analogue) | |
327 | { | |
328 | struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); | |
329 | ||
330 | BUG_ON(wm2000->anc_mode != ANC_BYPASS); | |
331 | ||
332 | wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0); | |
333 | ||
334 | if (analogue) { | |
335 | wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, | |
336 | WM2000_MODE_ANA_SEQ_INCLUDE | | |
337 | WM2000_MODE_MOUSE_ENABLE | | |
338 | WM2000_MODE_THERMAL_ENABLE); | |
339 | } else { | |
340 | wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, | |
341 | WM2000_MODE_MOUSE_ENABLE | | |
342 | WM2000_MODE_THERMAL_ENABLE); | |
343 | } | |
344 | ||
345 | wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET); | |
346 | wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR); | |
347 | ||
348 | if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS, | |
349 | WM2000_STATUS_MOUSE_ACTIVE, 10)) { | |
350 | dev_err(&i2c->dev, "Timed out waiting for MOUSE\n"); | |
351 | return -ETIMEDOUT; | |
352 | } | |
353 | ||
354 | wm2000->anc_mode = ANC_ACTIVE; | |
355 | dev_dbg(&i2c->dev, "MOUSE active\n"); | |
356 | ||
357 | return 0; | |
358 | } | |
359 | ||
360 | static int wm2000_enter_standby(struct i2c_client *i2c, int analogue) | |
361 | { | |
362 | struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); | |
363 | int timeout; | |
364 | ||
365 | BUG_ON(wm2000->anc_mode != ANC_ACTIVE); | |
366 | ||
367 | if (analogue) { | |
368 | timeout = 248; | |
369 | wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, timeout / 4); | |
370 | ||
371 | wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, | |
372 | WM2000_MODE_ANA_SEQ_INCLUDE | | |
373 | WM2000_MODE_THERMAL_ENABLE | | |
374 | WM2000_MODE_STANDBY_ENTRY); | |
375 | } else { | |
376 | timeout = 10; | |
377 | ||
378 | wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, | |
379 | WM2000_MODE_THERMAL_ENABLE | | |
380 | WM2000_MODE_STANDBY_ENTRY); | |
381 | } | |
382 | ||
383 | if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS, | |
384 | WM2000_STATUS_ANC_DISABLED, timeout)) { | |
385 | dev_err(&i2c->dev, | |
386 | "Timed out waiting for ANC disable after 1ms\n"); | |
387 | return -ETIMEDOUT; | |
388 | } | |
389 | ||
390 | if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT, WM2000_ANC_ENG_IDLE, | |
391 | 1)) { | |
392 | dev_err(&i2c->dev, | |
393 | "Timed out waiting for standby after %dms\n", | |
394 | timeout * 10); | |
395 | return -ETIMEDOUT; | |
396 | } | |
397 | ||
398 | wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY); | |
399 | wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR); | |
400 | ||
401 | wm2000->anc_mode = ANC_STANDBY; | |
402 | dev_dbg(&i2c->dev, "standby\n"); | |
403 | if (analogue) | |
404 | dev_dbg(&i2c->dev, "Analogue disabled\n"); | |
405 | ||
406 | return 0; | |
407 | } | |
408 | ||
409 | static int wm2000_exit_standby(struct i2c_client *i2c, int analogue) | |
410 | { | |
411 | struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); | |
412 | int timeout; | |
413 | ||
414 | BUG_ON(wm2000->anc_mode != ANC_STANDBY); | |
415 | ||
416 | wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0); | |
417 | ||
418 | if (analogue) { | |
419 | timeout = 248; | |
420 | wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, timeout / 4); | |
421 | ||
422 | wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, | |
423 | WM2000_MODE_ANA_SEQ_INCLUDE | | |
424 | WM2000_MODE_THERMAL_ENABLE | | |
425 | WM2000_MODE_MOUSE_ENABLE); | |
426 | } else { | |
427 | timeout = 10; | |
428 | ||
429 | wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL, | |
430 | WM2000_MODE_THERMAL_ENABLE | | |
431 | WM2000_MODE_MOUSE_ENABLE); | |
432 | } | |
433 | ||
434 | wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET); | |
435 | wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR); | |
436 | ||
437 | if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS, | |
438 | WM2000_STATUS_MOUSE_ACTIVE, timeout)) { | |
439 | dev_err(&i2c->dev, "Timed out waiting for MOUSE after %dms\n", | |
440 | timeout * 10); | |
441 | return -ETIMEDOUT; | |
442 | } | |
443 | ||
444 | wm2000->anc_mode = ANC_ACTIVE; | |
445 | dev_dbg(&i2c->dev, "MOUSE active\n"); | |
446 | if (analogue) | |
447 | dev_dbg(&i2c->dev, "Analogue enabled\n"); | |
448 | ||
449 | return 0; | |
450 | } | |
451 | ||
452 | typedef int (*wm2000_mode_fn)(struct i2c_client *i2c, int analogue); | |
453 | ||
454 | static struct { | |
455 | enum wm2000_anc_mode source; | |
456 | enum wm2000_anc_mode dest; | |
457 | int analogue; | |
458 | wm2000_mode_fn step[2]; | |
459 | } anc_transitions[] = { | |
460 | { | |
461 | .source = ANC_OFF, | |
462 | .dest = ANC_ACTIVE, | |
463 | .analogue = 1, | |
464 | .step = { | |
465 | wm2000_power_up, | |
466 | }, | |
467 | }, | |
468 | { | |
469 | .source = ANC_OFF, | |
470 | .dest = ANC_STANDBY, | |
471 | .step = { | |
472 | wm2000_power_up, | |
473 | wm2000_enter_standby, | |
474 | }, | |
475 | }, | |
476 | { | |
477 | .source = ANC_OFF, | |
478 | .dest = ANC_BYPASS, | |
479 | .analogue = 1, | |
480 | .step = { | |
481 | wm2000_power_up, | |
482 | wm2000_enter_bypass, | |
483 | }, | |
484 | }, | |
485 | { | |
486 | .source = ANC_ACTIVE, | |
487 | .dest = ANC_BYPASS, | |
488 | .analogue = 1, | |
489 | .step = { | |
490 | wm2000_enter_bypass, | |
491 | }, | |
492 | }, | |
493 | { | |
494 | .source = ANC_ACTIVE, | |
495 | .dest = ANC_STANDBY, | |
496 | .analogue = 1, | |
497 | .step = { | |
498 | wm2000_enter_standby, | |
499 | }, | |
500 | }, | |
501 | { | |
502 | .source = ANC_ACTIVE, | |
503 | .dest = ANC_OFF, | |
504 | .analogue = 1, | |
505 | .step = { | |
506 | wm2000_power_down, | |
507 | }, | |
508 | }, | |
509 | { | |
510 | .source = ANC_BYPASS, | |
511 | .dest = ANC_ACTIVE, | |
512 | .analogue = 1, | |
513 | .step = { | |
514 | wm2000_exit_bypass, | |
515 | }, | |
516 | }, | |
517 | { | |
518 | .source = ANC_BYPASS, | |
519 | .dest = ANC_STANDBY, | |
520 | .analogue = 1, | |
521 | .step = { | |
522 | wm2000_exit_bypass, | |
523 | wm2000_enter_standby, | |
524 | }, | |
525 | }, | |
526 | { | |
527 | .source = ANC_BYPASS, | |
528 | .dest = ANC_OFF, | |
529 | .step = { | |
530 | wm2000_exit_bypass, | |
531 | wm2000_power_down, | |
532 | }, | |
533 | }, | |
534 | { | |
535 | .source = ANC_STANDBY, | |
536 | .dest = ANC_ACTIVE, | |
537 | .analogue = 1, | |
538 | .step = { | |
539 | wm2000_exit_standby, | |
540 | }, | |
541 | }, | |
542 | { | |
543 | .source = ANC_STANDBY, | |
544 | .dest = ANC_BYPASS, | |
545 | .analogue = 1, | |
546 | .step = { | |
547 | wm2000_exit_standby, | |
548 | wm2000_enter_bypass, | |
549 | }, | |
550 | }, | |
551 | { | |
552 | .source = ANC_STANDBY, | |
553 | .dest = ANC_OFF, | |
554 | .step = { | |
555 | wm2000_exit_standby, | |
556 | wm2000_power_down, | |
557 | }, | |
558 | }, | |
559 | }; | |
560 | ||
561 | static int wm2000_anc_transition(struct wm2000_priv *wm2000, | |
562 | enum wm2000_anc_mode mode) | |
563 | { | |
564 | struct i2c_client *i2c = wm2000->i2c; | |
565 | int i, j; | |
566 | int ret; | |
567 | ||
568 | if (wm2000->anc_mode == mode) | |
569 | return 0; | |
570 | ||
571 | for (i = 0; i < ARRAY_SIZE(anc_transitions); i++) | |
572 | if (anc_transitions[i].source == wm2000->anc_mode && | |
573 | anc_transitions[i].dest == mode) | |
574 | break; | |
575 | if (i == ARRAY_SIZE(anc_transitions)) { | |
576 | dev_err(&i2c->dev, "No transition for %d->%d\n", | |
577 | wm2000->anc_mode, mode); | |
578 | return -EINVAL; | |
579 | } | |
580 | ||
581 | for (j = 0; j < ARRAY_SIZE(anc_transitions[j].step); j++) { | |
582 | if (!anc_transitions[i].step[j]) | |
583 | break; | |
584 | ret = anc_transitions[i].step[j](i2c, | |
585 | anc_transitions[i].analogue); | |
586 | if (ret != 0) | |
587 | return ret; | |
588 | } | |
589 | ||
590 | return 0; | |
591 | } | |
592 | ||
593 | static int wm2000_anc_set_mode(struct wm2000_priv *wm2000) | |
594 | { | |
595 | struct i2c_client *i2c = wm2000->i2c; | |
596 | enum wm2000_anc_mode mode; | |
597 | ||
598 | if (wm2000->anc_eng_ena && wm2000->spk_ena) | |
599 | if (wm2000->anc_active) | |
600 | mode = ANC_ACTIVE; | |
601 | else | |
602 | mode = ANC_BYPASS; | |
603 | else | |
604 | mode = ANC_STANDBY; | |
605 | ||
606 | dev_dbg(&i2c->dev, "Set mode %d (enabled %d, mute %d, active %d)\n", | |
607 | mode, wm2000->anc_eng_ena, !wm2000->spk_ena, | |
608 | wm2000->anc_active); | |
609 | ||
610 | return wm2000_anc_transition(wm2000, mode); | |
611 | } | |
612 | ||
613 | static int wm2000_anc_mode_get(struct snd_kcontrol *kcontrol, | |
614 | struct snd_ctl_elem_value *ucontrol) | |
615 | { | |
616 | struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev); | |
617 | ||
618 | ucontrol->value.enumerated.item[0] = wm2000->anc_active; | |
619 | ||
620 | return 0; | |
621 | } | |
622 | ||
623 | static int wm2000_anc_mode_put(struct snd_kcontrol *kcontrol, | |
624 | struct snd_ctl_elem_value *ucontrol) | |
625 | { | |
626 | struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev); | |
627 | int anc_active = ucontrol->value.enumerated.item[0]; | |
628 | ||
629 | if (anc_active > 1) | |
630 | return -EINVAL; | |
631 | ||
632 | wm2000->anc_active = anc_active; | |
633 | ||
634 | return wm2000_anc_set_mode(wm2000); | |
635 | } | |
636 | ||
637 | static int wm2000_speaker_get(struct snd_kcontrol *kcontrol, | |
638 | struct snd_ctl_elem_value *ucontrol) | |
639 | { | |
640 | struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev); | |
641 | ||
642 | ucontrol->value.enumerated.item[0] = wm2000->spk_ena; | |
643 | ||
644 | return 0; | |
645 | } | |
646 | ||
647 | static int wm2000_speaker_put(struct snd_kcontrol *kcontrol, | |
648 | struct snd_ctl_elem_value *ucontrol) | |
649 | { | |
650 | struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev); | |
651 | int val = ucontrol->value.enumerated.item[0]; | |
652 | ||
653 | if (val > 1) | |
654 | return -EINVAL; | |
655 | ||
656 | wm2000->spk_ena = val; | |
657 | ||
658 | return wm2000_anc_set_mode(wm2000); | |
659 | } | |
660 | ||
661 | static const struct snd_kcontrol_new wm2000_controls[] = { | |
662 | SOC_SINGLE_BOOL_EXT("WM2000 ANC Switch", 0, | |
663 | wm2000_anc_mode_get, | |
664 | wm2000_anc_mode_put), | |
665 | SOC_SINGLE_BOOL_EXT("WM2000 Switch", 0, | |
666 | wm2000_speaker_get, | |
667 | wm2000_speaker_put), | |
668 | }; | |
669 | ||
670 | static int wm2000_anc_power_event(struct snd_soc_dapm_widget *w, | |
671 | struct snd_kcontrol *kcontrol, int event) | |
672 | { | |
673 | struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev); | |
674 | ||
675 | if (SND_SOC_DAPM_EVENT_ON(event)) | |
676 | wm2000->anc_eng_ena = 1; | |
677 | ||
678 | if (SND_SOC_DAPM_EVENT_OFF(event)) | |
679 | wm2000->anc_eng_ena = 0; | |
680 | ||
681 | return wm2000_anc_set_mode(wm2000); | |
682 | } | |
683 | ||
684 | static const struct snd_soc_dapm_widget wm2000_dapm_widgets[] = { | |
685 | /* Externally visible pins */ | |
686 | SND_SOC_DAPM_OUTPUT("WM2000 SPKN"), | |
687 | SND_SOC_DAPM_OUTPUT("WM2000 SPKP"), | |
688 | ||
689 | SND_SOC_DAPM_INPUT("WM2000 LINN"), | |
690 | SND_SOC_DAPM_INPUT("WM2000 LINP"), | |
691 | ||
692 | SND_SOC_DAPM_PGA_E("ANC Engine", SND_SOC_NOPM, 0, 0, NULL, 0, | |
693 | wm2000_anc_power_event, | |
694 | SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), | |
695 | }; | |
696 | ||
697 | /* Target, Path, Source */ | |
698 | static const struct snd_soc_dapm_route audio_map[] = { | |
699 | { "WM2000 SPKN", NULL, "ANC Engine" }, | |
700 | { "WM2000 SPKP", NULL, "ANC Engine" }, | |
701 | { "ANC Engine", NULL, "WM2000 LINN" }, | |
702 | { "ANC Engine", NULL, "WM2000 LINP" }, | |
703 | }; | |
704 | ||
705 | /* Called from the machine driver */ | |
706 | int wm2000_add_controls(struct snd_soc_codec *codec) | |
707 | { | |
708 | int ret; | |
709 | ||
710 | if (!wm2000_i2c) { | |
711 | pr_err("WM2000 not yet probed\n"); | |
712 | return -ENODEV; | |
713 | } | |
714 | ||
715 | ret = snd_soc_dapm_new_controls(codec, wm2000_dapm_widgets, | |
716 | ARRAY_SIZE(wm2000_dapm_widgets)); | |
717 | if (ret < 0) | |
718 | return ret; | |
719 | ||
720 | ret = snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map)); | |
721 | if (ret < 0) | |
722 | return ret; | |
723 | ||
724 | return snd_soc_add_controls(codec, wm2000_controls, | |
725 | ARRAY_SIZE(wm2000_controls)); | |
726 | } | |
727 | EXPORT_SYMBOL_GPL(wm2000_add_controls); | |
728 | ||
729 | static int __devinit wm2000_i2c_probe(struct i2c_client *i2c, | |
730 | const struct i2c_device_id *i2c_id) | |
731 | { | |
732 | struct wm2000_priv *wm2000; | |
733 | struct wm2000_platform_data *pdata; | |
734 | const char *filename; | |
735 | const struct firmware *fw; | |
736 | int reg, ret; | |
737 | u16 id; | |
738 | ||
739 | if (wm2000_i2c) { | |
740 | dev_err(&i2c->dev, "Another WM2000 is already registered\n"); | |
741 | return -EINVAL; | |
742 | } | |
743 | ||
744 | wm2000 = kzalloc(sizeof(struct wm2000_priv), GFP_KERNEL); | |
745 | if (wm2000 == NULL) { | |
746 | dev_err(&i2c->dev, "Unable to allocate private data\n"); | |
747 | return -ENOMEM; | |
748 | } | |
749 | ||
750 | /* Verify that this is a WM2000 */ | |
751 | reg = wm2000_read(i2c, WM2000_REG_ID1); | |
752 | id = reg << 8; | |
753 | reg = wm2000_read(i2c, WM2000_REG_ID2); | |
754 | id |= reg & 0xff; | |
755 | ||
756 | if (id != 0x2000) { | |
757 | dev_err(&i2c->dev, "Device is not a WM2000 - ID %x\n", id); | |
758 | ret = -ENODEV; | |
759 | goto err; | |
760 | } | |
761 | ||
762 | reg = wm2000_read(i2c, WM2000_REG_REVISON); | |
763 | dev_info(&i2c->dev, "revision %c\n", reg + 'A'); | |
764 | ||
765 | filename = "wm2000_anc.bin"; | |
766 | pdata = dev_get_platdata(&i2c->dev); | |
767 | if (pdata) { | |
768 | wm2000->mclk_div = pdata->mclkdiv2; | |
769 | wm2000->speech_clarity = !pdata->speech_enh_disable; | |
770 | ||
771 | if (pdata->download_file) | |
772 | filename = pdata->download_file; | |
773 | } | |
774 | ||
775 | ret = request_firmware(&fw, filename, &i2c->dev); | |
776 | if (ret != 0) { | |
777 | dev_err(&i2c->dev, "Failed to acquire ANC data: %d\n", ret); | |
778 | goto err; | |
779 | } | |
780 | ||
781 | /* Pre-cook the concatenation of the register address onto the image */ | |
782 | wm2000->anc_download_size = fw->size + 2; | |
783 | wm2000->anc_download = kmalloc(wm2000->anc_download_size, GFP_KERNEL); | |
784 | if (wm2000->anc_download == NULL) { | |
785 | dev_err(&i2c->dev, "Out of memory\n"); | |
786 | ret = -ENOMEM; | |
787 | goto err_fw; | |
788 | } | |
789 | ||
790 | wm2000->anc_download[0] = 0x80; | |
791 | wm2000->anc_download[1] = 0x00; | |
792 | memcpy(wm2000->anc_download + 2, fw->data, fw->size); | |
793 | ||
794 | release_firmware(fw); | |
795 | ||
796 | dev_set_drvdata(&i2c->dev, wm2000); | |
797 | wm2000->anc_eng_ena = 1; | |
e71fa370 MB |
798 | wm2000->anc_active = 1; |
799 | wm2000->spk_ena = 1; | |
3a66d387 MB |
800 | wm2000->i2c = i2c; |
801 | ||
802 | wm2000_reset(wm2000); | |
803 | ||
804 | /* This will trigger a transition to standby mode by default */ | |
805 | wm2000_anc_set_mode(wm2000); | |
806 | ||
807 | wm2000_i2c = i2c; | |
808 | ||
809 | return 0; | |
810 | ||
811 | err_fw: | |
812 | release_firmware(fw); | |
813 | err: | |
814 | kfree(wm2000); | |
815 | return ret; | |
816 | } | |
817 | ||
818 | static __devexit int wm2000_i2c_remove(struct i2c_client *i2c) | |
819 | { | |
820 | struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); | |
821 | ||
822 | wm2000_anc_transition(wm2000, ANC_OFF); | |
823 | ||
824 | wm2000_i2c = NULL; | |
825 | kfree(wm2000->anc_download); | |
826 | kfree(wm2000); | |
827 | ||
828 | return 0; | |
829 | } | |
830 | ||
831 | static void wm2000_i2c_shutdown(struct i2c_client *i2c) | |
832 | { | |
833 | struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); | |
834 | ||
835 | wm2000_anc_transition(wm2000, ANC_OFF); | |
836 | } | |
837 | ||
838 | #ifdef CONFIG_PM | |
839 | static int wm2000_i2c_suspend(struct i2c_client *i2c, pm_message_t mesg) | |
840 | { | |
841 | struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); | |
842 | ||
843 | return wm2000_anc_transition(wm2000, ANC_OFF); | |
844 | } | |
845 | ||
846 | static int wm2000_i2c_resume(struct i2c_client *i2c) | |
847 | { | |
848 | struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev); | |
849 | ||
850 | return wm2000_anc_set_mode(wm2000); | |
851 | } | |
852 | #else | |
853 | #define wm2000_i2c_suspend NULL | |
854 | #define wm2000_i2c_resume NULL | |
855 | #endif | |
856 | ||
857 | static const struct i2c_device_id wm2000_i2c_id[] = { | |
858 | { "wm2000", 0 }, | |
859 | { } | |
860 | }; | |
861 | MODULE_DEVICE_TABLE(i2c, wm2000_i2c_id); | |
862 | ||
863 | static struct i2c_driver wm2000_i2c_driver = { | |
864 | .driver = { | |
865 | .name = "wm2000", | |
866 | .owner = THIS_MODULE, | |
867 | }, | |
868 | .probe = wm2000_i2c_probe, | |
869 | .remove = __devexit_p(wm2000_i2c_remove), | |
870 | .suspend = wm2000_i2c_suspend, | |
871 | .resume = wm2000_i2c_resume, | |
872 | .shutdown = wm2000_i2c_shutdown, | |
873 | .id_table = wm2000_i2c_id, | |
874 | }; | |
875 | ||
876 | static int __init wm2000_init(void) | |
877 | { | |
878 | return i2c_add_driver(&wm2000_i2c_driver); | |
879 | } | |
880 | module_init(wm2000_init); | |
881 | ||
882 | static void __exit wm2000_exit(void) | |
883 | { | |
884 | i2c_del_driver(&wm2000_i2c_driver); | |
885 | } | |
886 | module_exit(wm2000_exit); | |
887 | ||
888 | MODULE_DESCRIPTION("ASoC WM2000 driver"); | |
889 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfonmicro.com>"); | |
890 | MODULE_LICENSE("GPL"); |