2 * wm2000.c -- WM2000 ALSA Soc Audio driver
4 * Copyright 2008-2011 Wolfson Microelectronics PLC.
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
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.
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:
20 * perl -e 'while (<>) { s/[\r\n]+// ; printf("%c", hex($_)); }'
21 * < file > wm2000_anc.bin
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <linux/kernel.h>
27 #include <linux/init.h>
28 #include <linux/firmware.h>
29 #include <linux/clk.h>
30 #include <linux/delay.h>
32 #include <linux/i2c.h>
33 #include <linux/regmap.h>
34 #include <linux/debugfs.h>
35 #include <linux/regulator/consumer.h>
36 #include <linux/slab.h>
37 #include <sound/core.h>
38 #include <sound/pcm.h>
39 #include <sound/pcm_params.h>
40 #include <sound/soc.h>
41 #include <sound/initval.h>
42 #include <sound/tlv.h>
44 #include <sound/wm2000.h>
48 #define WM2000_NUM_SUPPLIES 3
50 static const char *wm2000_supplies[WM2000_NUM_SUPPLIES] = {
56 enum wm2000_anc_mode {
64 struct i2c_client *i2c;
65 struct regmap *regmap;
68 struct regulator_bulk_data supplies[WM2000_NUM_SUPPLIES];
70 enum wm2000_anc_mode anc_mode;
72 unsigned int anc_active:1;
73 unsigned int anc_eng_ena:1;
74 unsigned int spk_ena:1;
76 unsigned int speech_clarity:1;
78 int anc_download_size;
84 static int wm2000_write(struct i2c_client *i2c, unsigned int reg,
87 struct wm2000_priv *wm2000 = i2c_get_clientdata(i2c);
88 return regmap_write(wm2000->regmap, reg, value);
91 static unsigned int wm2000_read(struct i2c_client *i2c, unsigned int r)
93 struct wm2000_priv *wm2000 = i2c_get_clientdata(i2c);
97 ret = regmap_read(wm2000->regmap, r, &val);
104 static void wm2000_reset(struct wm2000_priv *wm2000)
106 struct i2c_client *i2c = wm2000->i2c;
108 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR);
109 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
110 wm2000_write(i2c, WM2000_REG_ID1, 0);
112 wm2000->anc_mode = ANC_OFF;
115 static int wm2000_poll_bit(struct i2c_client *i2c,
116 unsigned int reg, u8 mask)
121 val = wm2000_read(i2c, reg);
123 while (!(val & mask) && --timeout) {
125 val = wm2000_read(i2c, reg);
134 static int wm2000_power_up(struct i2c_client *i2c, int analogue)
136 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
140 BUG_ON(wm2000->anc_mode != ANC_OFF);
142 dev_dbg(&i2c->dev, "Beginning power up\n");
144 ret = regulator_bulk_enable(WM2000_NUM_SUPPLIES, wm2000->supplies);
146 dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
150 rate = clk_get_rate(wm2000->mclk);
151 if (rate <= 13500000) {
152 dev_dbg(&i2c->dev, "Disabling MCLK divider\n");
153 wm2000_write(i2c, WM2000_REG_SYS_CTL2,
154 WM2000_MCLK_DIV2_ENA_CLR);
156 dev_dbg(&i2c->dev, "Enabling MCLK divider\n");
157 wm2000_write(i2c, WM2000_REG_SYS_CTL2,
158 WM2000_MCLK_DIV2_ENA_SET);
161 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR);
162 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_SET);
164 /* Wait for ANC engine to become ready */
165 if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
166 WM2000_ANC_ENG_IDLE)) {
167 dev_err(&i2c->dev, "ANC engine failed to reset\n");
168 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
172 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
173 WM2000_STATUS_BOOT_COMPLETE)) {
174 dev_err(&i2c->dev, "ANC engine failed to initialise\n");
175 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
179 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
181 /* Open code download of the data since it is the only bulk
183 dev_dbg(&i2c->dev, "Downloading %d bytes\n",
184 wm2000->anc_download_size - 2);
186 ret = i2c_master_send(i2c, wm2000->anc_download,
187 wm2000->anc_download_size);
189 dev_err(&i2c->dev, "i2c_transfer() failed: %d\n", ret);
190 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
193 if (ret != wm2000->anc_download_size) {
194 dev_err(&i2c->dev, "i2c_transfer() failed, %d != %d\n",
195 ret, wm2000->anc_download_size);
196 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
200 dev_dbg(&i2c->dev, "Download complete\n");
203 wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, 248 / 4);
205 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
206 WM2000_MODE_ANA_SEQ_INCLUDE |
207 WM2000_MODE_MOUSE_ENABLE |
208 WM2000_MODE_THERMAL_ENABLE);
210 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
211 WM2000_MODE_MOUSE_ENABLE |
212 WM2000_MODE_THERMAL_ENABLE);
215 ret = wm2000_read(i2c, WM2000_REG_SPEECH_CLARITY);
216 if (wm2000->speech_clarity)
217 ret |= WM2000_SPEECH_CLARITY;
219 ret &= ~WM2000_SPEECH_CLARITY;
220 wm2000_write(i2c, WM2000_REG_SPEECH_CLARITY, ret);
222 wm2000_write(i2c, WM2000_REG_SYS_START0, 0x33);
223 wm2000_write(i2c, WM2000_REG_SYS_START1, 0x02);
225 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
227 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
228 WM2000_STATUS_MOUSE_ACTIVE)) {
229 dev_err(&i2c->dev, "Timed out waiting for device\n");
230 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
234 dev_dbg(&i2c->dev, "ANC active\n");
236 dev_dbg(&i2c->dev, "Analogue active\n");
237 wm2000->anc_mode = ANC_ACTIVE;
242 static int wm2000_power_down(struct i2c_client *i2c, int analogue)
244 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
247 wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, 248 / 4);
248 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
249 WM2000_MODE_ANA_SEQ_INCLUDE |
250 WM2000_MODE_POWER_DOWN);
252 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
253 WM2000_MODE_POWER_DOWN);
256 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
257 WM2000_STATUS_POWER_DOWN_COMPLETE)) {
258 dev_err(&i2c->dev, "Timeout waiting for ANC power down\n");
262 if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
263 WM2000_ANC_ENG_IDLE)) {
264 dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n");
268 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
270 dev_dbg(&i2c->dev, "powered off\n");
271 wm2000->anc_mode = ANC_OFF;
276 static int wm2000_enter_bypass(struct i2c_client *i2c, int analogue)
278 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
280 BUG_ON(wm2000->anc_mode != ANC_ACTIVE);
283 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
284 WM2000_MODE_ANA_SEQ_INCLUDE |
285 WM2000_MODE_THERMAL_ENABLE |
286 WM2000_MODE_BYPASS_ENTRY);
288 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
289 WM2000_MODE_THERMAL_ENABLE |
290 WM2000_MODE_BYPASS_ENTRY);
293 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
294 WM2000_STATUS_ANC_DISABLED)) {
295 dev_err(&i2c->dev, "Timeout waiting for ANC disable\n");
299 if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
300 WM2000_ANC_ENG_IDLE)) {
301 dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n");
305 wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY);
306 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
308 wm2000->anc_mode = ANC_BYPASS;
309 dev_dbg(&i2c->dev, "bypass enabled\n");
314 static int wm2000_exit_bypass(struct i2c_client *i2c, int analogue)
316 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
318 BUG_ON(wm2000->anc_mode != ANC_BYPASS);
320 wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0);
323 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
324 WM2000_MODE_ANA_SEQ_INCLUDE |
325 WM2000_MODE_MOUSE_ENABLE |
326 WM2000_MODE_THERMAL_ENABLE);
328 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
329 WM2000_MODE_MOUSE_ENABLE |
330 WM2000_MODE_THERMAL_ENABLE);
333 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
334 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
336 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
337 WM2000_STATUS_MOUSE_ACTIVE)) {
338 dev_err(&i2c->dev, "Timed out waiting for MOUSE\n");
342 wm2000->anc_mode = ANC_ACTIVE;
343 dev_dbg(&i2c->dev, "MOUSE active\n");
348 static int wm2000_enter_standby(struct i2c_client *i2c, int analogue)
350 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
352 BUG_ON(wm2000->anc_mode != ANC_ACTIVE);
355 wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, 248 / 4);
357 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
358 WM2000_MODE_ANA_SEQ_INCLUDE |
359 WM2000_MODE_THERMAL_ENABLE |
360 WM2000_MODE_STANDBY_ENTRY);
362 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
363 WM2000_MODE_THERMAL_ENABLE |
364 WM2000_MODE_STANDBY_ENTRY);
367 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
368 WM2000_STATUS_ANC_DISABLED)) {
370 "Timed out waiting for ANC disable after 1ms\n");
374 if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT, WM2000_ANC_ENG_IDLE)) {
376 "Timed out waiting for standby\n");
380 wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY);
381 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
383 wm2000->anc_mode = ANC_STANDBY;
384 dev_dbg(&i2c->dev, "standby\n");
386 dev_dbg(&i2c->dev, "Analogue disabled\n");
391 static int wm2000_exit_standby(struct i2c_client *i2c, int analogue)
393 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
395 BUG_ON(wm2000->anc_mode != ANC_STANDBY);
397 wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0);
400 wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, 248 / 4);
402 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
403 WM2000_MODE_ANA_SEQ_INCLUDE |
404 WM2000_MODE_THERMAL_ENABLE |
405 WM2000_MODE_MOUSE_ENABLE);
407 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
408 WM2000_MODE_THERMAL_ENABLE |
409 WM2000_MODE_MOUSE_ENABLE);
412 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
413 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
415 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
416 WM2000_STATUS_MOUSE_ACTIVE)) {
417 dev_err(&i2c->dev, "Timed out waiting for MOUSE\n");
421 wm2000->anc_mode = ANC_ACTIVE;
422 dev_dbg(&i2c->dev, "MOUSE active\n");
424 dev_dbg(&i2c->dev, "Analogue enabled\n");
429 typedef int (*wm2000_mode_fn)(struct i2c_client *i2c, int analogue);
432 enum wm2000_anc_mode source;
433 enum wm2000_anc_mode dest;
435 wm2000_mode_fn step[2];
436 } anc_transitions[] = {
450 wm2000_enter_standby,
463 .source = ANC_ACTIVE,
471 .source = ANC_ACTIVE,
475 wm2000_enter_standby,
479 .source = ANC_ACTIVE,
487 .source = ANC_BYPASS,
495 .source = ANC_BYPASS,
500 wm2000_enter_standby,
504 .source = ANC_BYPASS,
512 .source = ANC_STANDBY,
520 .source = ANC_STANDBY,
529 .source = ANC_STANDBY,
538 static int wm2000_anc_transition(struct wm2000_priv *wm2000,
539 enum wm2000_anc_mode mode)
541 struct i2c_client *i2c = wm2000->i2c;
545 if (wm2000->anc_mode == mode)
548 for (i = 0; i < ARRAY_SIZE(anc_transitions); i++)
549 if (anc_transitions[i].source == wm2000->anc_mode &&
550 anc_transitions[i].dest == mode)
552 if (i == ARRAY_SIZE(anc_transitions)) {
553 dev_err(&i2c->dev, "No transition for %d->%d\n",
554 wm2000->anc_mode, mode);
558 /* Maintain clock while active */
559 if (anc_transitions[i].source == ANC_OFF) {
560 ret = clk_prepare_enable(wm2000->mclk);
562 dev_err(&i2c->dev, "Failed to enable MCLK: %d\n", ret);
567 for (j = 0; j < ARRAY_SIZE(anc_transitions[j].step); j++) {
568 if (!anc_transitions[i].step[j])
570 ret = anc_transitions[i].step[j](i2c,
571 anc_transitions[i].analogue);
576 if (anc_transitions[i].dest == ANC_OFF)
577 clk_disable_unprepare(wm2000->mclk);
582 static int wm2000_anc_set_mode(struct wm2000_priv *wm2000)
584 struct i2c_client *i2c = wm2000->i2c;
585 enum wm2000_anc_mode mode;
587 if (wm2000->anc_eng_ena && wm2000->spk_ena)
588 if (wm2000->anc_active)
595 dev_dbg(&i2c->dev, "Set mode %d (enabled %d, mute %d, active %d)\n",
596 mode, wm2000->anc_eng_ena, !wm2000->spk_ena,
599 return wm2000_anc_transition(wm2000, mode);
602 static int wm2000_anc_mode_get(struct snd_kcontrol *kcontrol,
603 struct snd_ctl_elem_value *ucontrol)
605 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
606 struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
608 ucontrol->value.enumerated.item[0] = wm2000->anc_active;
613 static int wm2000_anc_mode_put(struct snd_kcontrol *kcontrol,
614 struct snd_ctl_elem_value *ucontrol)
616 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
617 struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
618 int anc_active = ucontrol->value.enumerated.item[0];
624 mutex_lock(&wm2000->lock);
626 wm2000->anc_active = anc_active;
628 ret = wm2000_anc_set_mode(wm2000);
630 mutex_unlock(&wm2000->lock);
635 static int wm2000_speaker_get(struct snd_kcontrol *kcontrol,
636 struct snd_ctl_elem_value *ucontrol)
638 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
639 struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
641 ucontrol->value.enumerated.item[0] = wm2000->spk_ena;
646 static int wm2000_speaker_put(struct snd_kcontrol *kcontrol,
647 struct snd_ctl_elem_value *ucontrol)
649 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
650 struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
651 int val = ucontrol->value.enumerated.item[0];
657 mutex_lock(&wm2000->lock);
659 wm2000->spk_ena = val;
661 ret = wm2000_anc_set_mode(wm2000);
663 mutex_unlock(&wm2000->lock);
668 static const struct snd_kcontrol_new wm2000_controls[] = {
669 SOC_SINGLE("ANC Volume", WM2000_REG_ANC_GAIN_CTRL, 0, 255, 0),
670 SOC_SINGLE_BOOL_EXT("WM2000 ANC Switch", 0,
672 wm2000_anc_mode_put),
673 SOC_SINGLE_BOOL_EXT("WM2000 Switch", 0,
678 static int wm2000_anc_power_event(struct snd_soc_dapm_widget *w,
679 struct snd_kcontrol *kcontrol, int event)
681 struct snd_soc_codec *codec = w->codec;
682 struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
685 mutex_lock(&wm2000->lock);
687 if (SND_SOC_DAPM_EVENT_ON(event))
688 wm2000->anc_eng_ena = 1;
690 if (SND_SOC_DAPM_EVENT_OFF(event))
691 wm2000->anc_eng_ena = 0;
693 ret = wm2000_anc_set_mode(wm2000);
695 mutex_unlock(&wm2000->lock);
700 static const struct snd_soc_dapm_widget wm2000_dapm_widgets[] = {
701 /* Externally visible pins */
702 SND_SOC_DAPM_OUTPUT("SPKN"),
703 SND_SOC_DAPM_OUTPUT("SPKP"),
705 SND_SOC_DAPM_INPUT("LINN"),
706 SND_SOC_DAPM_INPUT("LINP"),
708 SND_SOC_DAPM_PGA_E("ANC Engine", SND_SOC_NOPM, 0, 0, NULL, 0,
709 wm2000_anc_power_event,
710 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
713 /* Target, Path, Source */
714 static const struct snd_soc_dapm_route wm2000_audio_map[] = {
715 { "SPKN", NULL, "ANC Engine" },
716 { "SPKP", NULL, "ANC Engine" },
717 { "ANC Engine", NULL, "LINN" },
718 { "ANC Engine", NULL, "LINP" },
722 static int wm2000_suspend(struct snd_soc_codec *codec)
724 struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
726 return wm2000_anc_transition(wm2000, ANC_OFF);
729 static int wm2000_resume(struct snd_soc_codec *codec)
731 struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
733 return wm2000_anc_set_mode(wm2000);
736 #define wm2000_suspend NULL
737 #define wm2000_resume NULL
740 static bool wm2000_readable_reg(struct device *dev, unsigned int reg)
743 case WM2000_REG_SYS_START:
744 case WM2000_REG_ANC_GAIN_CTRL:
745 case WM2000_REG_MSE_TH1:
746 case WM2000_REG_MSE_TH2:
747 case WM2000_REG_SPEECH_CLARITY:
748 case WM2000_REG_SYS_WATCHDOG:
749 case WM2000_REG_ANA_VMID_PD_TIME:
750 case WM2000_REG_ANA_VMID_PU_TIME:
751 case WM2000_REG_CAT_FLTR_INDX:
752 case WM2000_REG_CAT_GAIN_0:
753 case WM2000_REG_SYS_STATUS:
754 case WM2000_REG_SYS_MODE_CNTRL:
755 case WM2000_REG_SYS_START0:
756 case WM2000_REG_SYS_START1:
759 case WM2000_REG_REVISON:
760 case WM2000_REG_SYS_CTL1:
761 case WM2000_REG_SYS_CTL2:
762 case WM2000_REG_ANC_STAT:
763 case WM2000_REG_IF_CTL:
764 case WM2000_REG_ANA_MIC_CTL:
765 case WM2000_REG_SPK_CTL:
772 static const struct regmap_config wm2000_regmap = {
776 .max_register = WM2000_REG_SPK_CTL,
777 .readable_reg = wm2000_readable_reg,
780 static int wm2000_probe(struct snd_soc_codec *codec)
782 struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
784 snd_soc_codec_set_cache_io(codec, 16, 8, SND_SOC_REGMAP);
786 /* This will trigger a transition to standby mode by default */
787 wm2000_anc_set_mode(wm2000);
792 static int wm2000_remove(struct snd_soc_codec *codec)
794 struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
796 return wm2000_anc_transition(wm2000, ANC_OFF);
799 static struct snd_soc_codec_driver soc_codec_dev_wm2000 = {
800 .probe = wm2000_probe,
801 .remove = wm2000_remove,
802 .suspend = wm2000_suspend,
803 .resume = wm2000_resume,
805 .dapm_widgets = wm2000_dapm_widgets,
806 .num_dapm_widgets = ARRAY_SIZE(wm2000_dapm_widgets),
807 .dapm_routes = wm2000_audio_map,
808 .num_dapm_routes = ARRAY_SIZE(wm2000_audio_map),
809 .controls = wm2000_controls,
810 .num_controls = ARRAY_SIZE(wm2000_controls),
813 static int wm2000_i2c_probe(struct i2c_client *i2c,
814 const struct i2c_device_id *i2c_id)
816 struct wm2000_priv *wm2000;
817 struct wm2000_platform_data *pdata;
818 const char *filename;
819 const struct firmware *fw = NULL;
824 wm2000 = devm_kzalloc(&i2c->dev, sizeof(struct wm2000_priv),
826 if (wm2000 == NULL) {
827 dev_err(&i2c->dev, "Unable to allocate private data\n");
831 mutex_init(&wm2000->lock);
833 dev_set_drvdata(&i2c->dev, wm2000);
835 wm2000->regmap = devm_regmap_init_i2c(i2c, &wm2000_regmap);
836 if (IS_ERR(wm2000->regmap)) {
837 ret = PTR_ERR(wm2000->regmap);
838 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
843 for (i = 0; i < WM2000_NUM_SUPPLIES; i++)
844 wm2000->supplies[i].supply = wm2000_supplies[i];
846 ret = devm_regulator_bulk_get(&i2c->dev, WM2000_NUM_SUPPLIES,
849 dev_err(&i2c->dev, "Failed to get supplies: %d\n", ret);
853 ret = regulator_bulk_enable(WM2000_NUM_SUPPLIES, wm2000->supplies);
855 dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
859 /* Verify that this is a WM2000 */
860 reg = wm2000_read(i2c, WM2000_REG_ID1);
862 reg = wm2000_read(i2c, WM2000_REG_ID2);
866 dev_err(&i2c->dev, "Device is not a WM2000 - ID %x\n", id);
871 reg = wm2000_read(i2c, WM2000_REG_REVISON);
872 dev_info(&i2c->dev, "revision %c\n", reg + 'A');
874 wm2000->mclk = devm_clk_get(&i2c->dev, "MCLK");
875 if (IS_ERR(wm2000->mclk)) {
876 ret = PTR_ERR(wm2000->mclk);
877 dev_err(&i2c->dev, "Failed to get MCLK: %d\n", ret);
881 filename = "wm2000_anc.bin";
882 pdata = dev_get_platdata(&i2c->dev);
884 wm2000->speech_clarity = !pdata->speech_enh_disable;
886 if (pdata->download_file)
887 filename = pdata->download_file;
890 ret = request_firmware(&fw, filename, &i2c->dev);
892 dev_err(&i2c->dev, "Failed to acquire ANC data: %d\n", ret);
896 /* Pre-cook the concatenation of the register address onto the image */
897 wm2000->anc_download_size = fw->size + 2;
898 wm2000->anc_download = devm_kzalloc(&i2c->dev,
899 wm2000->anc_download_size,
901 if (wm2000->anc_download == NULL) {
902 dev_err(&i2c->dev, "Out of memory\n");
907 wm2000->anc_download[0] = 0x80;
908 wm2000->anc_download[1] = 0x00;
909 memcpy(wm2000->anc_download + 2, fw->data, fw->size);
911 wm2000->anc_eng_ena = 1;
912 wm2000->anc_active = 1;
916 wm2000_reset(wm2000);
918 ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm2000, NULL, 0);
921 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
924 release_firmware(fw);
928 static int wm2000_i2c_remove(struct i2c_client *i2c)
930 snd_soc_unregister_codec(&i2c->dev);
935 static const struct i2c_device_id wm2000_i2c_id[] = {
939 MODULE_DEVICE_TABLE(i2c, wm2000_i2c_id);
941 static struct i2c_driver wm2000_i2c_driver = {
944 .owner = THIS_MODULE,
946 .probe = wm2000_i2c_probe,
947 .remove = wm2000_i2c_remove,
948 .id_table = wm2000_i2c_id,
951 module_i2c_driver(wm2000_i2c_driver);
953 MODULE_DESCRIPTION("ASoC WM2000 driver");
954 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfonmicro.com>");
955 MODULE_LICENSE("GPL");