--- /dev/null
+/*
+ * wm8974.c -- WM8974 ALSA Soc Audio driver
+ *
+ * Copyright 2006 Wolfson Microelectronics PLC.
+ *
+ * Author: Liam Girdwood <liam.girdwood@wolfsonmicro.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/version.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/i2c.h>
+#include <linux/platform_device.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <sound/initval.h>
+
+#include "wm8974.h"
+
+#define AUDIO_NAME "wm8974"
+#define WM8974_VERSION "0.6"
+
+struct snd_soc_codec_device soc_codec_dev_wm8974;
+
+/*
+ * wm8974 register cache
+ * We can't read the WM8974 register space when we are
+ * using 2 wire for device control, so we cache them instead.
+ */
+static const u16 wm8974_reg[WM8974_CACHEREGNUM] = {
+ 0x0000, 0x0000, 0x0000, 0x0000,
+ 0x0050, 0x0000, 0x0140, 0x0000,
+ 0x0000, 0x0000, 0x0000, 0x00ff,
+ 0x0000, 0x0000, 0x0100, 0x00ff,
+ 0x0000, 0x0000, 0x012c, 0x002c,
+ 0x002c, 0x002c, 0x002c, 0x0000,
+ 0x0032, 0x0000, 0x0000, 0x0000,
+ 0x0000, 0x0000, 0x0000, 0x0000,
+ 0x0038, 0x000b, 0x0032, 0x0000,
+ 0x0008, 0x000c, 0x0093, 0x00e9,
+ 0x0000, 0x0000, 0x0000, 0x0000,
+ 0x0003, 0x0010, 0x0000, 0x0000,
+ 0x0000, 0x0002, 0x0000, 0x0000,
+ 0x0000, 0x0000, 0x0039, 0x0000,
+ 0x0000,
+};
+
+/*
+ * read wm8974 register cache
+ */
+static inline unsigned int wm8974_read_reg_cache(struct snd_soc_codec * codec,
+ unsigned int reg)
+{
+ u16 *cache = codec->reg_cache;
+ if (reg == WM8974_RESET)
+ return 0;
+ if (reg >= WM8974_CACHEREGNUM)
+ return -1;
+ return cache[reg];
+}
+
+/*
+ * write wm8974 register cache
+ */
+static inline void wm8974_write_reg_cache(struct snd_soc_codec *codec,
+ u16 reg, unsigned int value)
+{
+ u16 *cache = codec->reg_cache;
+ if (reg >= WM8974_CACHEREGNUM)
+ return;
+ cache[reg] = value;
+}
+
+/*
+ * write to the WM8974 register space
+ */
+static int wm8974_write(struct snd_soc_codec *codec, unsigned int reg,
+ unsigned int value)
+{
+ u8 data[2];
+
+ /* data is
+ * D15..D9 WM8974 register offset
+ * D8...D0 register data
+ */
+ data[0] = (reg << 1) | ((value >> 8) & 0x0001);
+ data[1] = value & 0x00ff;
+
+ wm8974_write_reg_cache (codec, reg, value);
+ if (codec->hw_write(codec->control_data, data, 2) == 2)
+ return 0;
+ else
+ return -EIO;
+}
+
+#define wm8974_reset(c) wm8974_write(c, WM8974_RESET, 0)
+
+static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
+static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
+static const char *wm8974_eqmode[] = {"Capture", "Playback" };
+static const char *wm8974_bw[] = {"Narrow", "Wide" };
+static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" };
+static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" };
+static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" };
+static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" };
+static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" };
+static const char *wm8974_alc[] = {"ALC", "Limiter" };
+
+static const struct soc_enum wm8974_enum[] = {
+ SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */
+ SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */
+ SOC_ENUM_SINGLE(WM8974_DAC, 4, 4, wm8974_deemp),
+ SOC_ENUM_SINGLE(WM8974_EQ1, 8, 2, wm8974_eqmode),
+
+ SOC_ENUM_SINGLE(WM8974_EQ1, 5, 4, wm8974_eq1),
+ SOC_ENUM_SINGLE(WM8974_EQ2, 8, 2, wm8974_bw),
+ SOC_ENUM_SINGLE(WM8974_EQ2, 5, 4, wm8974_eq2),
+ SOC_ENUM_SINGLE(WM8974_EQ3, 8, 2, wm8974_bw),
+
+ SOC_ENUM_SINGLE(WM8974_EQ3, 5, 4, wm8974_eq3),
+ SOC_ENUM_SINGLE(WM8974_EQ4, 8, 2, wm8974_bw),
+ SOC_ENUM_SINGLE(WM8974_EQ4, 5, 4, wm8974_eq4),
+ SOC_ENUM_SINGLE(WM8974_EQ5, 8, 2, wm8974_bw),
+
+ SOC_ENUM_SINGLE(WM8974_EQ5, 5, 4, wm8974_eq5),
+ SOC_ENUM_SINGLE(WM8974_ALC3, 8, 2, wm8974_alc),
+};
+
+static const struct snd_kcontrol_new wm8974_snd_controls[] = {
+
+SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
+
+SOC_ENUM("DAC Companding", wm8974_enum[1]),
+SOC_ENUM("ADC Companding", wm8974_enum[0]),
+
+SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
+SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
+
+SOC_SINGLE("PCM Volume", WM8974_DACVOL, 0, 127, 0),
+
+SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
+SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
+SOC_SINGLE("ADC Inversion Switch", WM8974_COMP, 0, 1, 0),
+
+SOC_SINGLE("Capture Volume", WM8974_ADCVOL, 0, 127, 0),
+
+SOC_ENUM("Equaliser Function", wm8974_enum[3]),
+SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
+SOC_SINGLE("EQ1 Volume", WM8974_EQ1, 0, 31, 1),
+
+SOC_ENUM("Equaliser EQ2 Bandwith", wm8974_enum[5]),
+SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
+SOC_SINGLE("EQ2 Volume", WM8974_EQ2, 0, 31, 1),
+
+SOC_ENUM("Equaliser EQ3 Bandwith", wm8974_enum[7]),
+SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
+SOC_SINGLE("EQ3 Volume", WM8974_EQ3, 0, 31, 1),
+
+SOC_ENUM("Equaliser EQ4 Bandwith", wm8974_enum[9]),
+SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
+SOC_SINGLE("EQ4 Volume", WM8974_EQ4, 0, 31, 1),
+
+SOC_ENUM("Equaliser EQ5 Bandwith", wm8974_enum[11]),
+SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
+SOC_SINGLE("EQ5 Volume", WM8974_EQ5, 0, 31, 1),
+
+SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1, 8, 1, 0),
+SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1, 4, 15, 0),
+SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1, 0, 15, 0),
+
+SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2, 4, 7, 0),
+SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2, 0, 15, 0),
+
+SOC_SINGLE("ALC Enable Switch", WM8974_ALC1, 8, 1, 0),
+SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1, 3, 7, 0),
+SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1, 0, 7, 0),
+
+SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2, 8, 1, 0),
+SOC_SINGLE("ALC Capture Hold", WM8974_ALC2, 4, 7, 0),
+SOC_SINGLE("ALC Capture Target", WM8974_ALC2, 0, 15, 0),
+
+SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
+SOC_SINGLE("ALC Capture Decay", WM8974_ALC3, 4, 15, 0),
+SOC_SINGLE("ALC Capture Attack", WM8974_ALC3, 0, 15, 0),
+
+SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE, 3, 1, 0),
+SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE, 0, 7, 0),
+
+SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA, 7, 1, 0),
+SOC_SINGLE("Capture PGA Volume", WM8974_INPPGA, 0, 63, 0),
+
+SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL, 7, 1, 0),
+SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL, 6, 1, 1),
+SOC_SINGLE("Speaker Playback Volume", WM8974_SPKVOL, 0, 63, 0),
+
+SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST, 8, 1, 0),
+SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 0),
+};
+
+/* add non dapm controls */
+static int wm8974_add_controls(struct snd_soc_codec *codec)
+{
+ int err, i;
+
+ for (i = 0; i < ARRAY_SIZE(wm8974_snd_controls); i++) {
+ err = snd_ctl_add(codec->card,
+ snd_soc_cnew(&wm8974_snd_controls[i],codec, NULL));
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+
+/* Speaker Output Mixer */
+static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
+SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
+SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
+SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 1),
+};
+
+/* Mono Output Mixer */
+static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
+SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
+SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
+SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 1),
+};
+
+/* AUX Input boost vol */
+static const struct snd_kcontrol_new wm8974_aux_boost_controls =
+SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0);
+
+/* Mic Input boost vol */
+static const struct snd_kcontrol_new wm8974_mic_boost_controls =
+SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0);
+
+/* Capture boost switch */
+static const struct snd_kcontrol_new wm8974_capture_boost_controls =
+SOC_DAPM_SINGLE("Capture Boost Switch", WM8974_INPPGA, 6, 1, 0);
+
+/* Aux In to PGA */
+static const struct snd_kcontrol_new wm8974_aux_capture_boost_controls =
+SOC_DAPM_SINGLE("Aux Capture Boost Switch", WM8974_INPPGA, 2, 1, 0);
+
+/* Mic P In to PGA */
+static const struct snd_kcontrol_new wm8974_micp_capture_boost_controls =
+SOC_DAPM_SINGLE("Mic P Capture Boost Switch", WM8974_INPPGA, 0, 1, 0);
+
+/* Mic N In to PGA */
+static const struct snd_kcontrol_new wm8974_micn_capture_boost_controls =
+SOC_DAPM_SINGLE("Mic N Capture Boost Switch", WM8974_INPPGA, 1, 1, 0);
+
+static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
+SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
+ &wm8974_speaker_mixer_controls[0],
+ ARRAY_SIZE(wm8974_speaker_mixer_controls)),
+SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
+ &wm8974_mono_mixer_controls[0],
+ ARRAY_SIZE(wm8974_mono_mixer_controls)),
+SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
+SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER3, 0, 0),
+SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
+SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
+SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
+SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
+SND_SOC_DAPM_PGA("Mic PGA", WM8974_POWER2, 2, 0, NULL, 0),
+
+SND_SOC_DAPM_PGA("Aux Boost", SND_SOC_NOPM, 0, 0,
+ &wm8974_aux_boost_controls, 1),
+SND_SOC_DAPM_PGA("Mic Boost", SND_SOC_NOPM, 0, 0,
+ &wm8974_mic_boost_controls, 1),
+SND_SOC_DAPM_SWITCH("Capture Boost", SND_SOC_NOPM, 0, 0,
+ &wm8974_capture_boost_controls),
+
+SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0, NULL, 0),
+
+SND_SOC_DAPM_MICBIAS("Mic Bias", WM8974_POWER1, 4, 0),
+
+SND_SOC_DAPM_INPUT("MICN"),
+SND_SOC_DAPM_INPUT("MICP"),
+SND_SOC_DAPM_INPUT("AUX"),
+SND_SOC_DAPM_OUTPUT("MONOOUT"),
+SND_SOC_DAPM_OUTPUT("SPKOUTP"),
+SND_SOC_DAPM_OUTPUT("SPKOUTN"),
+};
+
+static const struct snd_soc_dapm_route audio_map[] = {
+ /* Mono output mixer */
+ {"Mono Mixer", "PCM Playback Switch", "DAC"},
+ {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
+ {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
+
+ /* Speaker output mixer */
+ {"Speaker Mixer", "PCM Playback Switch", "DAC"},
+ {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
+ {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
+
+ /* Outputs */
+ {"Mono Out", NULL, "Mono Mixer"},
+ {"MONOOUT", NULL, "Mono Out"},
+ {"SpkN Out", NULL, "Speaker Mixer"},
+ {"SpkP Out", NULL, "Speaker Mixer"},
+ {"SPKOUTN", NULL, "SpkN Out"},
+ {"SPKOUTP", NULL, "SpkP Out"},
+
+ /* Boost Mixer */
+ {"Boost Mixer", NULL, "ADC"},
+ {"Capture Boost Switch", "Aux Capture Boost Switch", "AUX"},
+ {"Aux Boost", "Aux Volume", "Boost Mixer"},
+ {"Capture Boost", "Capture Switch", "Boost Mixer"},
+ {"Mic Boost", "Mic Volume", "Boost Mixer"},
+
+ /* Inputs */
+ {"MICP", NULL, "Mic Boost"},
+ {"MICN", NULL, "Mic PGA"},
+ {"Mic PGA", NULL, "Capture Boost"},
+ {"AUX", NULL, "Aux Input"},
+};
+
+static int wm8974_add_widgets(struct snd_soc_codec *codec)
+{
+ snd_soc_dapm_new_controls(codec, wm8974_dapm_widgets,
+ ARRAY_SIZE(wm8974_dapm_widgets));
+
+ snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
+
+ snd_soc_dapm_new_widgets(codec);
+ return 0;
+}
+
+struct pll_ {
+ unsigned int in_hz, out_hz;
+ unsigned int pre:4; /* prescale - 1 */
+ unsigned int n:4;
+ unsigned int k;
+};
+
+static struct pll_ pll[] = {
+ {12000000, 11289600, 0, 7, 0x86c220},
+ {12000000, 12288000, 0, 8, 0x3126e8},
+ {13000000, 11289600, 0, 6, 0xf28bd4},
+ {13000000, 12288000, 0, 7, 0x8fd525},
+ {12288000, 11289600, 0, 7, 0x59999a},
+ {11289600, 12288000, 0, 8, 0x80dee9},
+ /* liam - add more entries */
+};
+
+static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai,
+ int pll_id, unsigned int freq_in, unsigned int freq_out)
+{
+ struct snd_soc_codec *codec = codec_dai->codec;
+ int i;
+ u16 reg;
+
+ if(freq_in == 0 || freq_out == 0) {
+ reg = wm8974_read_reg_cache(codec, WM8974_POWER1);
+ wm8974_write(codec, WM8974_POWER1, reg & 0x1df);
+ return 0;
+ }
+
+ for(i = 0; i < ARRAY_SIZE(pll); i++) {
+ if (freq_in == pll[i].in_hz && freq_out == pll[i].out_hz) {
+ wm8974_write(codec, WM8974_PLLN, (pll[i].pre << 4) | pll[i].n);
+ wm8974_write(codec, WM8974_PLLK1, pll[i].k >> 18);
+ wm8974_write(codec, WM8974_PLLK2, (pll[i].k >> 9) & 0x1ff);
+ wm8974_write(codec, WM8974_PLLK3, pll[i].k & 0x1ff);
+ reg = wm8974_read_reg_cache(codec, WM8974_POWER1);
+ wm8974_write(codec, WM8974_POWER1, reg | 0x020);
+ return 0;
+ }
+ }
+ return -EINVAL;
+}
+
+/*
+ * Configure WM8974 clock dividers.
+ */
+static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
+ int div_id, int div)
+{
+ struct snd_soc_codec *codec = codec_dai->codec;
+ u16 reg;
+
+ switch (div_id) {
+ case WM8974_OPCLKDIV:
+ reg = wm8974_read_reg_cache(codec, WM8974_GPIO) & 0x1cf;
+ wm8974_write(codec, WM8974_GPIO, reg | div);
+ break;
+ case WM8974_MCLKDIV:
+ reg = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x11f;
+ wm8974_write(codec, WM8974_CLOCK, reg | div);
+ break;
+ case WM8974_ADCCLK:
+ reg = wm8974_read_reg_cache(codec, WM8974_ADC) & 0x1f7;
+ wm8974_write(codec, WM8974_ADC, reg | div);
+ break;
+ case WM8974_DACCLK:
+ reg = wm8974_read_reg_cache(codec, WM8974_DAC) & 0x1f7;
+ wm8974_write(codec, WM8974_DAC, reg | div);
+ break;
+ case WM8974_BCLKDIV:
+ reg = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x1e3;
+ wm8974_write(codec, WM8974_CLOCK, reg | div);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
+ unsigned int fmt)
+{
+ struct snd_soc_codec *codec = codec_dai->codec;
+ u16 iface = 0;
+ u16 clk = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x1fe;
+
+ /* set master/slave audio interface */
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBM_CFM:
+ clk |= 0x0001;
+ break;
+ case SND_SOC_DAIFMT_CBS_CFS:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* interface format */
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ iface |= 0x0010;
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ iface |= 0x0008;
+ break;
+ case SND_SOC_DAIFMT_DSP_A:
+ iface |= 0x00018;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* clock inversion */
+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_NB_NF:
+ break;
+ case SND_SOC_DAIFMT_IB_IF:
+ iface |= 0x0180;
+ break;
+ case SND_SOC_DAIFMT_IB_NF:
+ iface |= 0x0100;
+ break;
+ case SND_SOC_DAIFMT_NB_IF:
+ iface |= 0x0080;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ wm8974_write(codec, WM8974_IFACE, iface);
+ wm8974_write(codec, WM8974_CLOCK, clk);
+ return 0;
+}
+
+static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ u16 iface = wm8974_read_reg_cache(codec, WM8974_IFACE) & 0x19f;
+ u16 adn = wm8974_read_reg_cache(codec, WM8974_ADD) & 0x1f1;
+
+ /* bit size */
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ break;
+ case SNDRV_PCM_FORMAT_S20_3LE:
+ iface |= 0x0020;
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ iface |= 0x0040;
+ break;
+ case SNDRV_PCM_FORMAT_S32_LE:
+ iface |= 0x0060;
+ break;
+ }
+
+ /* filter coefficient */
+ switch (params_rate(params)) {
+ case SNDRV_PCM_RATE_8000:
+ adn |= 0x5 << 1;
+ break;
+ case SNDRV_PCM_RATE_11025:
+ adn |= 0x4 << 1;
+ break;
+ case SNDRV_PCM_RATE_16000:
+ adn |= 0x3 << 1;
+ break;
+ case SNDRV_PCM_RATE_22050:
+ adn |= 0x2 << 1;
+ break;
+ case SNDRV_PCM_RATE_32000:
+ adn |= 0x1 << 1;
+ break;
+ case SNDRV_PCM_RATE_44100:
+ break;
+ }
+
+ wm8974_write(codec, WM8974_IFACE, iface);
+ wm8974_write(codec, WM8974_ADD, adn);
+ return 0;
+}
+
+static int wm8974_mute(struct snd_soc_dai *dai, int mute)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ u16 mute_reg = wm8974_read_reg_cache(codec, WM8974_DAC) & 0xffbf;
+
+ if(mute)
+ wm8974_write(codec, WM8974_DAC, mute_reg | 0x40);
+ else
+ wm8974_write(codec, WM8974_DAC, mute_reg);
+ return 0;
+}
+
+/* liam need to make this lower power with dapm */
+static int wm8974_set_bias_level(struct snd_soc_codec *codec,
+ enum snd_soc_bias_level level)
+{
+ switch (level) {
+ case SND_SOC_BIAS_ON:
+ wm8974_write(codec, WM8974_POWER1, 0x1ff);
+ wm8974_write(codec, WM8974_POWER2, 0x1ff);
+ wm8974_write(codec, WM8974_POWER3, 0x1ff);
+ break;
+ case SND_SOC_BIAS_PREPARE:
+ break;
+ case SND_SOC_BIAS_STANDBY:
+ break;
+ case SND_SOC_BIAS_OFF:
+ wm8974_write(codec, WM8974_POWER1, 0x0);
+ wm8974_write(codec, WM8974_POWER2, 0x0);
+ wm8974_write(codec, WM8974_POWER3, 0x0);
+ break;
+ }
+ codec->bias_level = level;
+ return 0;
+}
+
+#define WM8974_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
+ SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
+ SNDRV_PCM_RATE_48000)
+
+#define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
+ SNDRV_PCM_FMTBIT_S24_LE)
+
+static struct snd_soc_dai_ops wm8974_ops = {
+ .hw_params = wm8974_pcm_hw_params,
+ .digital_mute = wm8974_mute,
+ .set_fmt = wm8974_set_dai_fmt,
+ .set_clkdiv = wm8974_set_dai_clkdiv,
+ .set_pll = wm8974_set_dai_pll,
+};
+
+struct snd_soc_dai wm8974_dai = {
+ .name = "WM8974 HiFi",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 1,
+ .channels_max = 1,
+ .rates = WM8974_RATES,
+ .formats = WM8974_FORMATS,},
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 1,
+ .channels_max = 1,
+ .rates = WM8974_RATES,
+ .formats = WM8974_FORMATS,},
+ .ops = &wm8974_ops,
+};
+EXPORT_SYMBOL_GPL(wm8974_dai);
+
+static int wm8974_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+ struct snd_soc_codec *codec = socdev->card->codec;
+
+ wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
+ return 0;
+}
+
+static int wm8974_resume(struct platform_device *pdev)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+ struct snd_soc_codec *codec = socdev->card->codec;
+ int i;
+ u8 data[2];
+ u16 *cache = codec->reg_cache;
+
+ /* Sync reg_cache with the hardware */
+ for (i = 0; i < ARRAY_SIZE(wm8974_reg); i++) {
+ data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
+ data[1] = cache[i] & 0x00ff;
+ codec->hw_write(codec->control_data, data, 2);
+ }
+ wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+ wm8974_set_bias_level(codec, codec->suspend_bias_level);
+ return 0;
+}
+
+/*
+ * initialise the WM8974 driver
+ * register the mixer and dsp interfaces with the kernel
+ */
+static int wm8974_init(struct snd_soc_device *socdev)
+{
+ struct snd_soc_codec *codec = socdev->card->codec;
+ int ret = 0;
+
+ codec->name = "WM8974";
+ codec->owner = THIS_MODULE;
+ codec->read = wm8974_read_reg_cache;
+ codec->write = wm8974_write;
+ codec->set_bias_level = wm8974_set_bias_level;
+ codec->dai = &wm8974_dai;
+ codec->num_dai = 1;
+ codec->reg_cache_size = ARRAY_SIZE(wm8974_reg);
+ codec->reg_cache = kmemdup(wm8974_reg, sizeof(wm8974_reg), GFP_KERNEL);
+
+ if (codec->reg_cache == NULL)
+ return -ENOMEM;
+
+ wm8974_reset(codec);
+
+ /* register pcms */
+ ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
+ if(ret < 0) {
+ printk(KERN_ERR "wm8974: failed to create pcms\n");
+ goto pcm_err;
+ }
+
+ /* power on device */
+ wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+ wm8974_add_controls(codec);
+ wm8974_add_widgets(codec);
+ ret = snd_soc_init_card(socdev);
+ if (ret < 0) {
+ printk(KERN_ERR "wm8974: failed to register card\n");
+ goto card_err;
+ }
+ return ret;
+
+card_err:
+ snd_soc_free_pcms(socdev);
+ snd_soc_dapm_free(socdev);
+pcm_err:
+ kfree(codec->reg_cache);
+ return ret;
+}
+
+static struct snd_soc_device *wm8974_socdev;
+
+#if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
+
+/*
+ * WM8974 2 wire address is 0x1a
+ */
+#define I2C_DRIVERID_WM8974 0xfefe /* liam - need a proper id */
+
+static unsigned short normal_i2c[] = { 0, I2C_CLIENT_END };
+
+/* Magic definition of all other variables and things */
+I2C_CLIENT_INSMOD;
+
+static struct i2c_driver wm8974_i2c_driver;
+static struct i2c_client client_template;
+
+/* If the i2c layer weren't so broken, we could pass this kind of data
+ around */
+
+static int wm8974_codec_probe(struct i2c_adapter *adap, int addr, int kind)
+{
+ struct snd_soc_device *socdev = wm8974_socdev;
+ struct wm8974_setup_data *setup = socdev->codec_data;
+ struct snd_soc_codec *codec = socdev->card->codec;
+ struct i2c_client *i2c;
+ int ret;
+
+ if (addr != setup->i2c_address)
+ return -ENODEV;
+
+ client_template.adapter = adap;
+ client_template.addr = addr;
+
+ i2c = kmemdup(&client_template, sizeof(client_template), GFP_KERNEL);
+ if (i2c == NULL) {
+ kfree(codec);
+ return -ENOMEM;
+ }
+ i2c_set_clientdata(i2c, codec);
+ codec->control_data = i2c;
+
+ ret = i2c_attach_client(i2c);
+ if (ret < 0) {
+ pr_err("failed to attach codec at addr %x\n", addr);
+ goto err;
+ }
+
+ ret = wm8974_init(socdev);
+ if (ret < 0) {
+ pr_err("failed to initialise WM8974\n");
+ goto err;
+ }
+ return ret;
+
+err:
+ kfree(codec);
+ kfree(i2c);
+ return ret;
+}
+
+static int wm8974_i2c_detach(struct i2c_client *client)
+{
+ struct snd_soc_codec *codec = i2c_get_clientdata(client);
+ i2c_detach_client(client);
+ kfree(codec->reg_cache);
+ kfree(client);
+ return 0;
+}
+
+static int wm8974_i2c_attach(struct i2c_adapter *adap)
+{
+ return i2c_probe(adap, &addr_data, wm8974_codec_probe);
+}
+
+/* corgi i2c codec control layer */
+static struct i2c_driver wm8974_i2c_driver = {
+ .driver = {
+ .name = "WM8974 I2C Codec",
+ .owner = THIS_MODULE,
+ },
+ .id = I2C_DRIVERID_WM8974,
+ .attach_adapter = wm8974_i2c_attach,
+ .detach_client = wm8974_i2c_detach,
+ .command = NULL,
+};
+
+static struct i2c_client client_template = {
+ .name = "WM8974",
+ .driver = &wm8974_i2c_driver,
+};
+#endif
+
+static int wm8974_probe(struct platform_device *pdev)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+ struct wm8974_setup_data *setup;
+ struct snd_soc_codec *codec;
+ int ret = 0;
+
+ pr_info("WM8974 Audio Codec %s", WM8974_VERSION);
+
+ setup = socdev->codec_data;
+ codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
+ if (codec == NULL)
+ return -ENOMEM;
+
+ socdev->card->codec = codec;
+ mutex_init(&codec->mutex);
+ INIT_LIST_HEAD(&codec->dapm_widgets);
+ INIT_LIST_HEAD(&codec->dapm_paths);
+
+ wm8974_socdev = socdev;
+#if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
+ if (setup->i2c_address) {
+ normal_i2c[0] = setup->i2c_address;
+ codec->hw_write = (hw_write_t)i2c_master_send;
+ ret = i2c_add_driver(&wm8974_i2c_driver);
+ if (ret != 0)
+ printk(KERN_ERR "can't add i2c driver");
+ }
+#else
+ /* Add other interfaces here */
+#endif
+ return ret;
+}
+
+/* power down chip */
+static int wm8974_remove(struct platform_device *pdev)
+{
+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+ struct snd_soc_codec *codec = socdev->card->codec;
+
+ if (codec->control_data)
+ wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
+
+ snd_soc_free_pcms(socdev);
+ snd_soc_dapm_free(socdev);
+#if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
+ i2c_del_driver(&wm8974_i2c_driver);
+#endif
+ kfree(codec);
+
+ return 0;
+}
+
+struct snd_soc_codec_device soc_codec_dev_wm8974 = {
+ .probe = wm8974_probe,
+ .remove = wm8974_remove,
+ .suspend = wm8974_suspend,
+ .resume = wm8974_resume,
+};
+EXPORT_SYMBOL_GPL(soc_codec_dev_wm8974);
+
+static int __init wm8974_modinit(void)
+{
+ return snd_soc_register_dai(&wm8974_dai);
+}
+module_init(wm8974_modinit);
+
+static void __exit wm8974_exit(void)
+{
+ snd_soc_unregister_dai(&wm8974_dai);
+}
+module_exit(wm8974_exit);
+
+MODULE_DESCRIPTION("ASoC WM8974 driver");
+MODULE_AUTHOR("Liam Girdwood");
+MODULE_LICENSE("GPL");
projects / linux-beck.git / commitdiff