1 // SPDX-License-Identifier: GPL-2.0-only
3 * wm2000.c -- WM2000 ALSA Soc Audio driver
5 * Copyright 2008-2011 Wolfson Microelectronics PLC.
7 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
9 * The download image for the WM2000 will be requested as
10 * 'wm2000_anc.bin' by default (overridable via platform data) at
11 * runtime and is expected to be in flat binary format. This is
12 * generated by Wolfson configuration tools and includes
13 * system-specific calibration information. If supplied as a
14 * sequence of ASCII-encoded hexidecimal bytes this can be converted
15 * into a flat binary with a command such as this on the command line:
17 * perl -e 'while (<>) { s/[\r\n]+// ; printf("%c", hex($_)); }'
18 * < file > wm2000_anc.bin
21 #include <linux/module.h>
22 #include <linux/moduleparam.h>
23 #include <linux/kernel.h>
24 #include <linux/init.h>
25 #include <linux/firmware.h>
26 #include <linux/clk.h>
27 #include <linux/delay.h>
29 #include <linux/i2c.h>
30 #include <linux/regmap.h>
31 #include <linux/debugfs.h>
32 #include <linux/regulator/consumer.h>
33 #include <linux/slab.h>
34 #include <sound/core.h>
35 #include <sound/pcm.h>
36 #include <sound/pcm_params.h>
37 #include <sound/soc.h>
38 #include <sound/initval.h>
39 #include <sound/tlv.h>
41 #include <sound/wm2000.h>
45 #define WM2000_NUM_SUPPLIES 3
47 static const char *wm2000_supplies[WM2000_NUM_SUPPLIES] = {
53 enum wm2000_anc_mode {
61 struct i2c_client *i2c;
62 struct regmap *regmap;
65 struct regulator_bulk_data supplies[WM2000_NUM_SUPPLIES];
67 enum wm2000_anc_mode anc_mode;
69 unsigned int anc_active:1;
70 unsigned int anc_eng_ena:1;
71 unsigned int spk_ena:1;
73 unsigned int speech_clarity:1;
75 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 void wm2000_reset(struct wm2000_priv *wm2000)
90 struct i2c_client *i2c = wm2000->i2c;
92 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR);
93 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
94 wm2000_write(i2c, WM2000_REG_ID1, 0);
96 wm2000->anc_mode = ANC_OFF;
99 static int wm2000_poll_bit(struct i2c_client *i2c,
100 unsigned int reg, u8 mask)
102 struct wm2000_priv *wm2000 = i2c_get_clientdata(i2c);
106 regmap_read(wm2000->regmap, reg, &val);
108 while (!(val & mask) && --timeout) {
110 regmap_read(wm2000->regmap, reg, &val);
119 static int wm2000_power_up(struct i2c_client *i2c, int analogue)
121 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
126 if (WARN_ON(wm2000->anc_mode != ANC_OFF))
129 dev_dbg(&i2c->dev, "Beginning power up\n");
131 ret = regulator_bulk_enable(WM2000_NUM_SUPPLIES, wm2000->supplies);
133 dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
137 rate = clk_get_rate(wm2000->mclk);
138 if (rate <= 13500000) {
139 dev_dbg(&i2c->dev, "Disabling MCLK divider\n");
140 wm2000_write(i2c, WM2000_REG_SYS_CTL2,
141 WM2000_MCLK_DIV2_ENA_CLR);
143 dev_dbg(&i2c->dev, "Enabling MCLK divider\n");
144 wm2000_write(i2c, WM2000_REG_SYS_CTL2,
145 WM2000_MCLK_DIV2_ENA_SET);
148 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR);
149 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_SET);
151 /* Wait for ANC engine to become ready */
152 if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
153 WM2000_ANC_ENG_IDLE)) {
154 dev_err(&i2c->dev, "ANC engine failed to reset\n");
155 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
159 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
160 WM2000_STATUS_BOOT_COMPLETE)) {
161 dev_err(&i2c->dev, "ANC engine failed to initialise\n");
162 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
166 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
168 /* Open code download of the data since it is the only bulk
170 dev_dbg(&i2c->dev, "Downloading %d bytes\n",
171 wm2000->anc_download_size - 2);
173 ret = i2c_master_send(i2c, wm2000->anc_download,
174 wm2000->anc_download_size);
176 dev_err(&i2c->dev, "i2c_transfer() failed: %d\n", ret);
177 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
180 if (ret != wm2000->anc_download_size) {
181 dev_err(&i2c->dev, "i2c_transfer() failed, %d != %d\n",
182 ret, wm2000->anc_download_size);
183 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
187 dev_dbg(&i2c->dev, "Download complete\n");
190 wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, 248 / 4);
192 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
193 WM2000_MODE_ANA_SEQ_INCLUDE |
194 WM2000_MODE_MOUSE_ENABLE |
195 WM2000_MODE_THERMAL_ENABLE);
197 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
198 WM2000_MODE_MOUSE_ENABLE |
199 WM2000_MODE_THERMAL_ENABLE);
202 ret = regmap_read(wm2000->regmap, WM2000_REG_SPEECH_CLARITY, &val);
204 dev_err(&i2c->dev, "Unable to read Speech Clarity: %d\n", ret);
205 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
208 if (wm2000->speech_clarity)
209 val |= WM2000_SPEECH_CLARITY;
211 val &= ~WM2000_SPEECH_CLARITY;
212 wm2000_write(i2c, WM2000_REG_SPEECH_CLARITY, val);
214 wm2000_write(i2c, WM2000_REG_SYS_START0, 0x33);
215 wm2000_write(i2c, WM2000_REG_SYS_START1, 0x02);
217 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
219 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
220 WM2000_STATUS_MOUSE_ACTIVE)) {
221 dev_err(&i2c->dev, "Timed out waiting for device\n");
222 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
226 dev_dbg(&i2c->dev, "ANC active\n");
228 dev_dbg(&i2c->dev, "Analogue active\n");
229 wm2000->anc_mode = ANC_ACTIVE;
234 static int wm2000_power_down(struct i2c_client *i2c, int analogue)
236 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
239 wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, 248 / 4);
240 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
241 WM2000_MODE_ANA_SEQ_INCLUDE |
242 WM2000_MODE_POWER_DOWN);
244 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
245 WM2000_MODE_POWER_DOWN);
248 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
249 WM2000_STATUS_POWER_DOWN_COMPLETE)) {
250 dev_err(&i2c->dev, "Timeout waiting for ANC power down\n");
254 if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
255 WM2000_ANC_ENG_IDLE)) {
256 dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n");
260 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
262 dev_dbg(&i2c->dev, "powered off\n");
263 wm2000->anc_mode = ANC_OFF;
268 static int wm2000_enter_bypass(struct i2c_client *i2c, int analogue)
270 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
272 if (WARN_ON(wm2000->anc_mode != ANC_ACTIVE))
276 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
277 WM2000_MODE_ANA_SEQ_INCLUDE |
278 WM2000_MODE_THERMAL_ENABLE |
279 WM2000_MODE_BYPASS_ENTRY);
281 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
282 WM2000_MODE_THERMAL_ENABLE |
283 WM2000_MODE_BYPASS_ENTRY);
286 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
287 WM2000_STATUS_ANC_DISABLED)) {
288 dev_err(&i2c->dev, "Timeout waiting for ANC disable\n");
292 if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
293 WM2000_ANC_ENG_IDLE)) {
294 dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n");
298 wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY);
299 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
301 wm2000->anc_mode = ANC_BYPASS;
302 dev_dbg(&i2c->dev, "bypass enabled\n");
307 static int wm2000_exit_bypass(struct i2c_client *i2c, int analogue)
309 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
311 if (WARN_ON(wm2000->anc_mode != ANC_BYPASS))
314 wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0);
317 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
318 WM2000_MODE_ANA_SEQ_INCLUDE |
319 WM2000_MODE_MOUSE_ENABLE |
320 WM2000_MODE_THERMAL_ENABLE);
322 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
323 WM2000_MODE_MOUSE_ENABLE |
324 WM2000_MODE_THERMAL_ENABLE);
327 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
328 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
330 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
331 WM2000_STATUS_MOUSE_ACTIVE)) {
332 dev_err(&i2c->dev, "Timed out waiting for MOUSE\n");
336 wm2000->anc_mode = ANC_ACTIVE;
337 dev_dbg(&i2c->dev, "MOUSE active\n");
342 static int wm2000_enter_standby(struct i2c_client *i2c, int analogue)
344 struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
346 if (WARN_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 if (WARN_ON(wm2000->anc_mode != ANC_STANDBY))
393 wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0);
396 wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, 248 / 4);
398 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
399 WM2000_MODE_ANA_SEQ_INCLUDE |
400 WM2000_MODE_THERMAL_ENABLE |
401 WM2000_MODE_MOUSE_ENABLE);
403 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
404 WM2000_MODE_THERMAL_ENABLE |
405 WM2000_MODE_MOUSE_ENABLE);
408 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
409 wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
411 if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
412 WM2000_STATUS_MOUSE_ACTIVE)) {
413 dev_err(&i2c->dev, "Timed out waiting for MOUSE\n");
417 wm2000->anc_mode = ANC_ACTIVE;
418 dev_dbg(&i2c->dev, "MOUSE active\n");
420 dev_dbg(&i2c->dev, "Analogue enabled\n");
425 typedef int (*wm2000_mode_fn)(struct i2c_client *i2c, int analogue);
428 enum wm2000_anc_mode source;
429 enum wm2000_anc_mode dest;
431 wm2000_mode_fn step[2];
432 } anc_transitions[] = {
446 wm2000_enter_standby,
459 .source = ANC_ACTIVE,
467 .source = ANC_ACTIVE,
471 wm2000_enter_standby,
475 .source = ANC_ACTIVE,
483 .source = ANC_BYPASS,
491 .source = ANC_BYPASS,
496 wm2000_enter_standby,
500 .source = ANC_BYPASS,
508 .source = ANC_STANDBY,
516 .source = ANC_STANDBY,
525 .source = ANC_STANDBY,
534 static int wm2000_anc_transition(struct wm2000_priv *wm2000,
535 enum wm2000_anc_mode mode)
537 struct i2c_client *i2c = wm2000->i2c;
541 if (wm2000->anc_mode == mode)
544 for (i = 0; i < ARRAY_SIZE(anc_transitions); i++)
545 if (anc_transitions[i].source == wm2000->anc_mode &&
546 anc_transitions[i].dest == mode)
548 if (i == ARRAY_SIZE(anc_transitions)) {
549 dev_err(&i2c->dev, "No transition for %d->%d\n",
550 wm2000->anc_mode, mode);
554 /* Maintain clock while active */
555 if (anc_transitions[i].source == ANC_OFF) {
556 ret = clk_prepare_enable(wm2000->mclk);
558 dev_err(&i2c->dev, "Failed to enable MCLK: %d\n", ret);
563 for (j = 0; j < ARRAY_SIZE(anc_transitions[j].step); j++) {
564 if (!anc_transitions[i].step[j])
566 ret = anc_transitions[i].step[j](i2c,
567 anc_transitions[i].analogue);
572 if (anc_transitions[i].dest == ANC_OFF)
573 clk_disable_unprepare(wm2000->mclk);
578 static int wm2000_anc_set_mode(struct wm2000_priv *wm2000)
580 struct i2c_client *i2c = wm2000->i2c;
581 enum wm2000_anc_mode mode;
583 if (wm2000->anc_eng_ena && wm2000->spk_ena)
584 if (wm2000->anc_active)
591 dev_dbg(&i2c->dev, "Set mode %d (enabled %d, mute %d, active %d)\n",
592 mode, wm2000->anc_eng_ena, !wm2000->spk_ena,
595 return wm2000_anc_transition(wm2000, mode);
598 static int wm2000_anc_mode_get(struct snd_kcontrol *kcontrol,
599 struct snd_ctl_elem_value *ucontrol)
601 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
602 struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
604 ucontrol->value.integer.value[0] = wm2000->anc_active;
609 static int wm2000_anc_mode_put(struct snd_kcontrol *kcontrol,
610 struct snd_ctl_elem_value *ucontrol)
612 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
613 struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
614 unsigned int anc_active = ucontrol->value.integer.value[0];
620 mutex_lock(&wm2000->lock);
622 wm2000->anc_active = anc_active;
624 ret = wm2000_anc_set_mode(wm2000);
626 mutex_unlock(&wm2000->lock);
631 static int wm2000_speaker_get(struct snd_kcontrol *kcontrol,
632 struct snd_ctl_elem_value *ucontrol)
634 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
635 struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
637 ucontrol->value.integer.value[0] = wm2000->spk_ena;
642 static int wm2000_speaker_put(struct snd_kcontrol *kcontrol,
643 struct snd_ctl_elem_value *ucontrol)
645 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
646 struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
647 unsigned int val = ucontrol->value.integer.value[0];
653 mutex_lock(&wm2000->lock);
655 wm2000->spk_ena = val;
657 ret = wm2000_anc_set_mode(wm2000);
659 mutex_unlock(&wm2000->lock);
664 static const struct snd_kcontrol_new wm2000_controls[] = {
665 SOC_SINGLE("ANC Volume", WM2000_REG_ANC_GAIN_CTRL, 0, 255, 0),
666 SOC_SINGLE_BOOL_EXT("WM2000 ANC Switch", 0,
668 wm2000_anc_mode_put),
669 SOC_SINGLE_BOOL_EXT("WM2000 Switch", 0,
674 static int wm2000_anc_power_event(struct snd_soc_dapm_widget *w,
675 struct snd_kcontrol *kcontrol, int event)
677 struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
678 struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
681 mutex_lock(&wm2000->lock);
683 if (SND_SOC_DAPM_EVENT_ON(event))
684 wm2000->anc_eng_ena = 1;
686 if (SND_SOC_DAPM_EVENT_OFF(event))
687 wm2000->anc_eng_ena = 0;
689 ret = wm2000_anc_set_mode(wm2000);
691 mutex_unlock(&wm2000->lock);
696 static const struct snd_soc_dapm_widget wm2000_dapm_widgets[] = {
697 /* Externally visible pins */
698 SND_SOC_DAPM_OUTPUT("SPKN"),
699 SND_SOC_DAPM_OUTPUT("SPKP"),
701 SND_SOC_DAPM_INPUT("LINN"),
702 SND_SOC_DAPM_INPUT("LINP"),
704 SND_SOC_DAPM_PGA_E("ANC Engine", SND_SOC_NOPM, 0, 0, NULL, 0,
705 wm2000_anc_power_event,
706 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
709 /* Target, Path, Source */
710 static const struct snd_soc_dapm_route wm2000_audio_map[] = {
711 { "SPKN", NULL, "ANC Engine" },
712 { "SPKP", NULL, "ANC Engine" },
713 { "ANC Engine", NULL, "LINN" },
714 { "ANC Engine", NULL, "LINP" },
718 static int wm2000_suspend(struct snd_soc_component *component)
720 struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
722 return wm2000_anc_transition(wm2000, ANC_OFF);
725 static int wm2000_resume(struct snd_soc_component *component)
727 struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
729 return wm2000_anc_set_mode(wm2000);
732 #define wm2000_suspend NULL
733 #define wm2000_resume NULL
736 static bool wm2000_readable_reg(struct device *dev, unsigned int reg)
739 case WM2000_REG_SYS_START:
740 case WM2000_REG_ANC_GAIN_CTRL:
741 case WM2000_REG_MSE_TH1:
742 case WM2000_REG_MSE_TH2:
743 case WM2000_REG_SPEECH_CLARITY:
744 case WM2000_REG_SYS_WATCHDOG:
745 case WM2000_REG_ANA_VMID_PD_TIME:
746 case WM2000_REG_ANA_VMID_PU_TIME:
747 case WM2000_REG_CAT_FLTR_INDX:
748 case WM2000_REG_CAT_GAIN_0:
749 case WM2000_REG_SYS_STATUS:
750 case WM2000_REG_SYS_MODE_CNTRL:
751 case WM2000_REG_SYS_START0:
752 case WM2000_REG_SYS_START1:
755 case WM2000_REG_REVISON:
756 case WM2000_REG_SYS_CTL1:
757 case WM2000_REG_SYS_CTL2:
758 case WM2000_REG_ANC_STAT:
759 case WM2000_REG_IF_CTL:
760 case WM2000_REG_ANA_MIC_CTL:
761 case WM2000_REG_SPK_CTL:
768 static const struct regmap_config wm2000_regmap = {
772 .max_register = WM2000_REG_SPK_CTL,
773 .readable_reg = wm2000_readable_reg,
776 static int wm2000_probe(struct snd_soc_component *component)
778 struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
780 /* This will trigger a transition to standby mode by default */
781 wm2000_anc_set_mode(wm2000);
786 static void wm2000_remove(struct snd_soc_component *component)
788 struct wm2000_priv *wm2000 = dev_get_drvdata(component->dev);
790 wm2000_anc_transition(wm2000, ANC_OFF);
793 static const struct snd_soc_component_driver soc_component_dev_wm2000 = {
794 .probe = wm2000_probe,
795 .remove = wm2000_remove,
796 .suspend = wm2000_suspend,
797 .resume = wm2000_resume,
798 .controls = wm2000_controls,
799 .num_controls = ARRAY_SIZE(wm2000_controls),
800 .dapm_widgets = wm2000_dapm_widgets,
801 .num_dapm_widgets = ARRAY_SIZE(wm2000_dapm_widgets),
802 .dapm_routes = wm2000_audio_map,
803 .num_dapm_routes = ARRAY_SIZE(wm2000_audio_map),
805 .use_pmdown_time = 1,
807 .non_legacy_dai_naming = 1,
810 static int wm2000_i2c_probe(struct i2c_client *i2c,
811 const struct i2c_device_id *i2c_id)
813 struct wm2000_priv *wm2000;
814 struct wm2000_platform_data *pdata;
815 const char *filename;
816 const struct firmware *fw = NULL;
821 wm2000 = devm_kzalloc(&i2c->dev, sizeof(*wm2000), GFP_KERNEL);
825 mutex_init(&wm2000->lock);
827 dev_set_drvdata(&i2c->dev, wm2000);
829 wm2000->regmap = devm_regmap_init_i2c(i2c, &wm2000_regmap);
830 if (IS_ERR(wm2000->regmap)) {
831 ret = PTR_ERR(wm2000->regmap);
832 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
837 for (i = 0; i < WM2000_NUM_SUPPLIES; i++)
838 wm2000->supplies[i].supply = wm2000_supplies[i];
840 ret = devm_regulator_bulk_get(&i2c->dev, WM2000_NUM_SUPPLIES,
843 dev_err(&i2c->dev, "Failed to get supplies: %d\n", ret);
847 ret = regulator_bulk_enable(WM2000_NUM_SUPPLIES, wm2000->supplies);
849 dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
853 /* Verify that this is a WM2000 */
854 ret = regmap_read(wm2000->regmap, WM2000_REG_ID1, ®);
856 dev_err(&i2c->dev, "Unable to read ID1: %d\n", ret);
860 ret = regmap_read(wm2000->regmap, WM2000_REG_ID2, ®);
862 dev_err(&i2c->dev, "Unable to read ID2: %d\n", ret);
868 dev_err(&i2c->dev, "Device is not a WM2000 - ID %x\n", id);
873 ret = regmap_read(wm2000->regmap, WM2000_REG_REVISON, ®);
875 dev_err(&i2c->dev, "Unable to read Revision: %d\n", ret);
878 dev_info(&i2c->dev, "revision %c\n", reg + 'A');
880 wm2000->mclk = devm_clk_get(&i2c->dev, "MCLK");
881 if (IS_ERR(wm2000->mclk)) {
882 ret = PTR_ERR(wm2000->mclk);
883 dev_err(&i2c->dev, "Failed to get MCLK: %d\n", ret);
887 filename = "wm2000_anc.bin";
888 pdata = dev_get_platdata(&i2c->dev);
890 wm2000->speech_clarity = !pdata->speech_enh_disable;
892 if (pdata->download_file)
893 filename = pdata->download_file;
896 ret = request_firmware(&fw, filename, &i2c->dev);
898 dev_err(&i2c->dev, "Failed to acquire ANC data: %d\n", ret);
902 /* Pre-cook the concatenation of the register address onto the image */
903 wm2000->anc_download_size = fw->size + 2;
904 wm2000->anc_download = devm_kzalloc(&i2c->dev,
905 wm2000->anc_download_size,
907 if (wm2000->anc_download == NULL) {
912 wm2000->anc_download[0] = 0x80;
913 wm2000->anc_download[1] = 0x00;
914 memcpy(wm2000->anc_download + 2, fw->data, fw->size);
916 wm2000->anc_eng_ena = 1;
917 wm2000->anc_active = 1;
921 wm2000_reset(wm2000);
923 ret = devm_snd_soc_register_component(&i2c->dev,
924 &soc_component_dev_wm2000, NULL, 0);
927 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
930 release_firmware(fw);
934 static const struct i2c_device_id wm2000_i2c_id[] = {
938 MODULE_DEVICE_TABLE(i2c, wm2000_i2c_id);
940 static struct i2c_driver wm2000_i2c_driver = {
944 .probe = wm2000_i2c_probe,
945 .id_table = wm2000_i2c_id,
948 module_i2c_driver(wm2000_i2c_driver);
950 MODULE_DESCRIPTION("ASoC WM2000 driver");
951 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfonmicro.com>");
952 MODULE_LICENSE("GPL");