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/delay.h>
31 #include <linux/i2c.h>
32 #include <linux/regmap.h>
33 #include <linux/debugfs.h>
34 #include <linux/regulator/consumer.h>
35 #include <linux/slab.h>
36 #include <sound/core.h>
37 #include <sound/pcm.h>
38 #include <sound/pcm_params.h>
39 #include <sound/soc.h>
40 #include <sound/initval.h>
41 #include <sound/tlv.h>
43 #include <sound/wm2000.h>
47 #define WM2000_NUM_SUPPLIES 3
49 static const char *wm2000_supplies[WM2000_NUM_SUPPLIES] = {
55 enum wm2000_anc_mode {
63 struct i2c_client *i2c;
64 struct regmap *regmap;
66 struct regulator_bulk_data supplies[WM2000_NUM_SUPPLIES];
68 enum wm2000_anc_mode anc_mode;
70 unsigned int anc_active:1;
71 unsigned int anc_eng_ena:1;
72 unsigned int spk_ena:1;
74 unsigned int mclk_div:1;
75 unsigned int speech_clarity:1;
77 int anc_download_size;
81 static int wm2000_write(struct i2c_client *i2c, unsigned int reg,
84 struct wm2000_priv *wm2000 = i2c_get_clientdata(i2c);
85 return regmap_write(wm2000->regmap, reg, value);
88 static unsigned int wm2000_read(struct i2c_client *i2c, unsigned int r)
90 struct wm2000_priv *wm2000 = i2c_get_clientdata(i2c);
94 ret = regmap_read(wm2000->regmap, r, &val);
101 static void wm2000_reset(struct wm2000_priv *wm2000)
103 struct i2c_client *i2c = wm2000->i2c;
105 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR);
106 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
107 wm2000_write(i2c, WM2000_REG_ID1, 0);
109 wm2000->anc_mode = ANC_OFF;
112 static int wm2000_poll_bit(struct i2c_client *i2c,
113 unsigned int reg, u8 mask)
118 val = wm2000_read(i2c, reg);
120 while (!(val & mask) && --timeout) {
122 val = wm2000_read(i2c, reg);
131 static int wm2000_power_up(struct i2c_client *i2c, int analogue)
133 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
136 BUG_ON(wm2000->anc_mode != ANC_OFF);
138 dev_dbg(&i2c->dev, "Beginning power up\n");
140 ret = regulator_bulk_enable(WM2000_NUM_SUPPLIES, wm2000->supplies);
142 dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
146 if (!wm2000->mclk_div) {
147 dev_dbg(&i2c->dev, "Disabling MCLK divider\n");
148 wm2000_write(i2c, WM2000_REG_SYS_CTL2,
149 WM2000_MCLK_DIV2_ENA_CLR);
151 dev_dbg(&i2c->dev, "Enabling MCLK divider\n");
152 wm2000_write(i2c, WM2000_REG_SYS_CTL2,
153 WM2000_MCLK_DIV2_ENA_SET);
156 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR);
157 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_SET);
159 /* Wait for ANC engine to become ready */
160 if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
161 WM2000_ANC_ENG_IDLE)) {
162 dev_err(&i2c->dev, "ANC engine failed to reset\n");
163 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
167 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
168 WM2000_STATUS_BOOT_COMPLETE)) {
169 dev_err(&i2c->dev, "ANC engine failed to initialise\n");
170 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
174 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
176 /* Open code download of the data since it is the only bulk
178 dev_dbg(&i2c->dev, "Downloading %d bytes\n",
179 wm2000->anc_download_size - 2);
181 ret = i2c_master_send(i2c, wm2000->anc_download,
182 wm2000->anc_download_size);
184 dev_err(&i2c->dev, "i2c_transfer() failed: %d\n", ret);
185 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
188 if (ret != wm2000->anc_download_size) {
189 dev_err(&i2c->dev, "i2c_transfer() failed, %d != %d\n",
190 ret, wm2000->anc_download_size);
191 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
195 dev_dbg(&i2c->dev, "Download complete\n");
198 wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, 248 / 4);
200 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
201 WM2000_MODE_ANA_SEQ_INCLUDE |
202 WM2000_MODE_MOUSE_ENABLE |
203 WM2000_MODE_THERMAL_ENABLE);
205 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
206 WM2000_MODE_MOUSE_ENABLE |
207 WM2000_MODE_THERMAL_ENABLE);
210 ret = wm2000_read(i2c, WM2000_REG_SPEECH_CLARITY);
211 if (wm2000->speech_clarity)
212 ret |= WM2000_SPEECH_CLARITY;
214 ret &= ~WM2000_SPEECH_CLARITY;
215 wm2000_write(i2c, WM2000_REG_SPEECH_CLARITY, ret);
217 wm2000_write(i2c, WM2000_REG_SYS_START0, 0x33);
218 wm2000_write(i2c, WM2000_REG_SYS_START1, 0x02);
220 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
222 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
223 WM2000_STATUS_MOUSE_ACTIVE)) {
224 dev_err(&i2c->dev, "Timed out waiting for device\n");
225 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
229 dev_dbg(&i2c->dev, "ANC active\n");
231 dev_dbg(&i2c->dev, "Analogue active\n");
232 wm2000->anc_mode = ANC_ACTIVE;
237 static int wm2000_power_down(struct i2c_client *i2c, int analogue)
239 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
242 wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, 248 / 4);
243 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
244 WM2000_MODE_ANA_SEQ_INCLUDE |
245 WM2000_MODE_POWER_DOWN);
247 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
248 WM2000_MODE_POWER_DOWN);
251 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
252 WM2000_STATUS_POWER_DOWN_COMPLETE)) {
253 dev_err(&i2c->dev, "Timeout waiting for ANC power down\n");
257 if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
258 WM2000_ANC_ENG_IDLE)) {
259 dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n");
263 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
265 dev_dbg(&i2c->dev, "powered off\n");
266 wm2000->anc_mode = ANC_OFF;
271 static int wm2000_enter_bypass(struct i2c_client *i2c, int analogue)
273 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
275 BUG_ON(wm2000->anc_mode != ANC_ACTIVE);
278 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
279 WM2000_MODE_ANA_SEQ_INCLUDE |
280 WM2000_MODE_THERMAL_ENABLE |
281 WM2000_MODE_BYPASS_ENTRY);
283 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
284 WM2000_MODE_THERMAL_ENABLE |
285 WM2000_MODE_BYPASS_ENTRY);
288 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
289 WM2000_STATUS_ANC_DISABLED)) {
290 dev_err(&i2c->dev, "Timeout waiting for ANC disable\n");
294 if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
295 WM2000_ANC_ENG_IDLE)) {
296 dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n");
300 wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY);
301 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
303 wm2000->anc_mode = ANC_BYPASS;
304 dev_dbg(&i2c->dev, "bypass enabled\n");
309 static int wm2000_exit_bypass(struct i2c_client *i2c, int analogue)
311 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
313 BUG_ON(wm2000->anc_mode != ANC_BYPASS);
315 wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0);
318 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
319 WM2000_MODE_ANA_SEQ_INCLUDE |
320 WM2000_MODE_MOUSE_ENABLE |
321 WM2000_MODE_THERMAL_ENABLE);
323 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
324 WM2000_MODE_MOUSE_ENABLE |
325 WM2000_MODE_THERMAL_ENABLE);
328 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
329 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
331 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
332 WM2000_STATUS_MOUSE_ACTIVE)) {
333 dev_err(&i2c->dev, "Timed out waiting for MOUSE\n");
337 wm2000->anc_mode = ANC_ACTIVE;
338 dev_dbg(&i2c->dev, "MOUSE active\n");
343 static int wm2000_enter_standby(struct i2c_client *i2c, int analogue)
345 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
347 BUG_ON(wm2000->anc_mode != ANC_ACTIVE);
350 wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, 248 / 4);
352 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
353 WM2000_MODE_ANA_SEQ_INCLUDE |
354 WM2000_MODE_THERMAL_ENABLE |
355 WM2000_MODE_STANDBY_ENTRY);
357 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
358 WM2000_MODE_THERMAL_ENABLE |
359 WM2000_MODE_STANDBY_ENTRY);
362 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
363 WM2000_STATUS_ANC_DISABLED)) {
365 "Timed out waiting for ANC disable after 1ms\n");
369 if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT, WM2000_ANC_ENG_IDLE)) {
371 "Timed out waiting for standby\n");
375 wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY);
376 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
378 wm2000->anc_mode = ANC_STANDBY;
379 dev_dbg(&i2c->dev, "standby\n");
381 dev_dbg(&i2c->dev, "Analogue disabled\n");
386 static int wm2000_exit_standby(struct i2c_client *i2c, int analogue)
388 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
390 BUG_ON(wm2000->anc_mode != ANC_STANDBY);
392 wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0);
395 wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, 248 / 4);
397 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
398 WM2000_MODE_ANA_SEQ_INCLUDE |
399 WM2000_MODE_THERMAL_ENABLE |
400 WM2000_MODE_MOUSE_ENABLE);
402 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
403 WM2000_MODE_THERMAL_ENABLE |
404 WM2000_MODE_MOUSE_ENABLE);
407 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
408 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
410 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
411 WM2000_STATUS_MOUSE_ACTIVE)) {
412 dev_err(&i2c->dev, "Timed out waiting for MOUSE\n");
416 wm2000->anc_mode = ANC_ACTIVE;
417 dev_dbg(&i2c->dev, "MOUSE active\n");
419 dev_dbg(&i2c->dev, "Analogue enabled\n");
424 typedef int (*wm2000_mode_fn)(struct i2c_client *i2c, int analogue);
427 enum wm2000_anc_mode source;
428 enum wm2000_anc_mode dest;
430 wm2000_mode_fn step[2];
431 } anc_transitions[] = {
445 wm2000_enter_standby,
458 .source = ANC_ACTIVE,
466 .source = ANC_ACTIVE,
470 wm2000_enter_standby,
474 .source = ANC_ACTIVE,
482 .source = ANC_BYPASS,
490 .source = ANC_BYPASS,
495 wm2000_enter_standby,
499 .source = ANC_BYPASS,
507 .source = ANC_STANDBY,
515 .source = ANC_STANDBY,
524 .source = ANC_STANDBY,
533 static int wm2000_anc_transition(struct wm2000_priv *wm2000,
534 enum wm2000_anc_mode mode)
536 struct i2c_client *i2c = wm2000->i2c;
540 if (wm2000->anc_mode == mode)
543 for (i = 0; i < ARRAY_SIZE(anc_transitions); i++)
544 if (anc_transitions[i].source == wm2000->anc_mode &&
545 anc_transitions[i].dest == mode)
547 if (i == ARRAY_SIZE(anc_transitions)) {
548 dev_err(&i2c->dev, "No transition for %d->%d\n",
549 wm2000->anc_mode, mode);
553 for (j = 0; j < ARRAY_SIZE(anc_transitions[j].step); j++) {
554 if (!anc_transitions[i].step[j])
556 ret = anc_transitions[i].step[j](i2c,
557 anc_transitions[i].analogue);
565 static int wm2000_anc_set_mode(struct wm2000_priv *wm2000)
567 struct i2c_client *i2c = wm2000->i2c;
568 enum wm2000_anc_mode mode;
570 if (wm2000->anc_eng_ena && wm2000->spk_ena)
571 if (wm2000->anc_active)
578 dev_dbg(&i2c->dev, "Set mode %d (enabled %d, mute %d, active %d)\n",
579 mode, wm2000->anc_eng_ena, !wm2000->spk_ena,
582 return wm2000_anc_transition(wm2000, mode);
585 static int wm2000_anc_mode_get(struct snd_kcontrol *kcontrol,
586 struct snd_ctl_elem_value *ucontrol)
588 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
589 struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
591 ucontrol->value.enumerated.item[0] = wm2000->anc_active;
596 static int wm2000_anc_mode_put(struct snd_kcontrol *kcontrol,
597 struct snd_ctl_elem_value *ucontrol)
599 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
600 struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
601 int anc_active = ucontrol->value.enumerated.item[0];
606 wm2000->anc_active = anc_active;
608 return wm2000_anc_set_mode(wm2000);
611 static int wm2000_speaker_get(struct snd_kcontrol *kcontrol,
612 struct snd_ctl_elem_value *ucontrol)
614 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
615 struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
617 ucontrol->value.enumerated.item[0] = wm2000->spk_ena;
622 static int wm2000_speaker_put(struct snd_kcontrol *kcontrol,
623 struct snd_ctl_elem_value *ucontrol)
625 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
626 struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
627 int val = ucontrol->value.enumerated.item[0];
632 wm2000->spk_ena = val;
634 return wm2000_anc_set_mode(wm2000);
637 static const struct snd_kcontrol_new wm2000_controls[] = {
638 SOC_SINGLE_BOOL_EXT("WM2000 ANC Switch", 0,
640 wm2000_anc_mode_put),
641 SOC_SINGLE_BOOL_EXT("WM2000 Switch", 0,
646 static int wm2000_anc_power_event(struct snd_soc_dapm_widget *w,
647 struct snd_kcontrol *kcontrol, int event)
649 struct snd_soc_codec *codec = w->codec;
650 struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
652 if (SND_SOC_DAPM_EVENT_ON(event))
653 wm2000->anc_eng_ena = 1;
655 if (SND_SOC_DAPM_EVENT_OFF(event))
656 wm2000->anc_eng_ena = 0;
658 return wm2000_anc_set_mode(wm2000);
661 static const struct snd_soc_dapm_widget wm2000_dapm_widgets[] = {
662 /* Externally visible pins */
663 SND_SOC_DAPM_OUTPUT("SPKN"),
664 SND_SOC_DAPM_OUTPUT("SPKP"),
666 SND_SOC_DAPM_INPUT("LINN"),
667 SND_SOC_DAPM_INPUT("LINP"),
669 SND_SOC_DAPM_PGA_E("ANC Engine", SND_SOC_NOPM, 0, 0, NULL, 0,
670 wm2000_anc_power_event,
671 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
674 /* Target, Path, Source */
675 static const struct snd_soc_dapm_route wm2000_audio_map[] = {
676 { "SPKN", NULL, "ANC Engine" },
677 { "SPKP", NULL, "ANC Engine" },
678 { "ANC Engine", NULL, "LINN" },
679 { "ANC Engine", NULL, "LINP" },
683 static int wm2000_suspend(struct snd_soc_codec *codec)
685 struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
687 return wm2000_anc_transition(wm2000, ANC_OFF);
690 static int wm2000_resume(struct snd_soc_codec *codec)
692 struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
694 return wm2000_anc_set_mode(wm2000);
697 #define wm2000_suspend NULL
698 #define wm2000_resume NULL
701 static bool wm2000_readable_reg(struct device *dev, unsigned int reg)
704 case WM2000_REG_SYS_START:
705 case WM2000_REG_SPEECH_CLARITY:
706 case WM2000_REG_SYS_WATCHDOG:
707 case WM2000_REG_ANA_VMID_PD_TIME:
708 case WM2000_REG_ANA_VMID_PU_TIME:
709 case WM2000_REG_CAT_FLTR_INDX:
710 case WM2000_REG_CAT_GAIN_0:
711 case WM2000_REG_SYS_STATUS:
712 case WM2000_REG_SYS_MODE_CNTRL:
713 case WM2000_REG_SYS_START0:
714 case WM2000_REG_SYS_START1:
717 case WM2000_REG_REVISON:
718 case WM2000_REG_SYS_CTL1:
719 case WM2000_REG_SYS_CTL2:
720 case WM2000_REG_ANC_STAT:
721 case WM2000_REG_IF_CTL:
728 static const struct regmap_config wm2000_regmap = {
732 .max_register = WM2000_REG_IF_CTL,
733 .readable_reg = wm2000_readable_reg,
736 static int wm2000_probe(struct snd_soc_codec *codec)
738 struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
740 /* This will trigger a transition to standby mode by default */
741 wm2000_anc_set_mode(wm2000);
746 static int wm2000_remove(struct snd_soc_codec *codec)
748 struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
750 return wm2000_anc_transition(wm2000, ANC_OFF);
753 static struct snd_soc_codec_driver soc_codec_dev_wm2000 = {
754 .probe = wm2000_probe,
755 .remove = wm2000_remove,
756 .suspend = wm2000_suspend,
757 .resume = wm2000_resume,
759 .dapm_widgets = wm2000_dapm_widgets,
760 .num_dapm_widgets = ARRAY_SIZE(wm2000_dapm_widgets),
761 .dapm_routes = wm2000_audio_map,
762 .num_dapm_routes = ARRAY_SIZE(wm2000_audio_map),
763 .controls = wm2000_controls,
764 .num_controls = ARRAY_SIZE(wm2000_controls),
767 static int wm2000_i2c_probe(struct i2c_client *i2c,
768 const struct i2c_device_id *i2c_id)
770 struct wm2000_priv *wm2000;
771 struct wm2000_platform_data *pdata;
772 const char *filename;
773 const struct firmware *fw = NULL;
778 wm2000 = devm_kzalloc(&i2c->dev, sizeof(struct wm2000_priv),
780 if (wm2000 == NULL) {
781 dev_err(&i2c->dev, "Unable to allocate private data\n");
785 dev_set_drvdata(&i2c->dev, wm2000);
787 wm2000->regmap = devm_regmap_init_i2c(i2c, &wm2000_regmap);
788 if (IS_ERR(wm2000->regmap)) {
789 ret = PTR_ERR(wm2000->regmap);
790 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
795 for (i = 0; i < WM2000_NUM_SUPPLIES; i++)
796 wm2000->supplies[i].supply = wm2000_supplies[i];
798 ret = devm_regulator_bulk_get(&i2c->dev, WM2000_NUM_SUPPLIES,
801 dev_err(&i2c->dev, "Failed to get supplies: %d\n", ret);
805 ret = regulator_bulk_enable(WM2000_NUM_SUPPLIES, wm2000->supplies);
807 dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
811 /* Verify that this is a WM2000 */
812 reg = wm2000_read(i2c, WM2000_REG_ID1);
814 reg = wm2000_read(i2c, WM2000_REG_ID2);
818 dev_err(&i2c->dev, "Device is not a WM2000 - ID %x\n", id);
823 reg = wm2000_read(i2c, WM2000_REG_REVISON);
824 dev_info(&i2c->dev, "revision %c\n", reg + 'A');
826 filename = "wm2000_anc.bin";
827 pdata = dev_get_platdata(&i2c->dev);
829 wm2000->mclk_div = pdata->mclkdiv2;
830 wm2000->speech_clarity = !pdata->speech_enh_disable;
832 if (pdata->download_file)
833 filename = pdata->download_file;
836 ret = request_firmware(&fw, filename, &i2c->dev);
838 dev_err(&i2c->dev, "Failed to acquire ANC data: %d\n", ret);
842 /* Pre-cook the concatenation of the register address onto the image */
843 wm2000->anc_download_size = fw->size + 2;
844 wm2000->anc_download = devm_kzalloc(&i2c->dev,
845 wm2000->anc_download_size,
847 if (wm2000->anc_download == NULL) {
848 dev_err(&i2c->dev, "Out of memory\n");
853 wm2000->anc_download[0] = 0x80;
854 wm2000->anc_download[1] = 0x00;
855 memcpy(wm2000->anc_download + 2, fw->data, fw->size);
857 wm2000->anc_eng_ena = 1;
858 wm2000->anc_active = 1;
862 wm2000_reset(wm2000);
864 ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm2000, NULL, 0);
867 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
870 release_firmware(fw);
874 static int wm2000_i2c_remove(struct i2c_client *i2c)
876 snd_soc_unregister_codec(&i2c->dev);
881 static const struct i2c_device_id wm2000_i2c_id[] = {
885 MODULE_DEVICE_TABLE(i2c, wm2000_i2c_id);
887 static struct i2c_driver wm2000_i2c_driver = {
890 .owner = THIS_MODULE,
892 .probe = wm2000_i2c_probe,
893 .remove = wm2000_i2c_remove,
894 .id_table = wm2000_i2c_id,
897 module_i2c_driver(wm2000_i2c_driver);
899 MODULE_DESCRIPTION("ASoC WM2000 driver");
900 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfonmicro.com>");
901 MODULE_LICENSE("GPL");