[alsa-devel] [PATCH] ASoC: WM8804: Initial driver
Dimitris Papastamos
dp at opensource.wolfsonmicro.com
Wed Sep 29 12:14:56 CEST 2010
The WM8804 is a high performance consumer mode
S/PDIF transceiver with support for 1 received channel and
1 transmitted channel.
Signed-off-by: Dimitris Papastamos <dp at opensource.wolfsonmicro.com>
---
sound/soc/codecs/Kconfig | 4 +
sound/soc/codecs/Makefile | 2 +
sound/soc/codecs/wm8804.c | 820 +++++++++++++++++++++++++++++++++++++++++++++
sound/soc/codecs/wm8804.h | 61 ++++
4 files changed, 887 insertions(+), 0 deletions(-)
create mode 100644 sound/soc/codecs/wm8804.c
create mode 100644 sound/soc/codecs/wm8804.h
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 4ccc2b7..ff7b922 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -56,6 +56,7 @@ config SND_SOC_ALL_CODECS
select SND_SOC_WM8750 if SND_SOC_I2C_AND_SPI
select SND_SOC_WM8753 if SND_SOC_I2C_AND_SPI
select SND_SOC_WM8776 if SND_SOC_I2C_AND_SPI
+ select SND_SOC_WM8804 if SND_SOC_I2C_AND_SPI
select SND_SOC_WM8900 if I2C
select SND_SOC_WM8903 if I2C
select SND_SOC_WM8904 if I2C
@@ -237,6 +238,9 @@ config SND_SOC_WM8753
config SND_SOC_WM8776
tristate
+config SND_SOC_WM8804
+ tristate
+
config SND_SOC_WM8900
tristate
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index 23e7e2c..0c5f329 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -41,6 +41,7 @@ snd-soc-wm8741-objs := wm8741.o
snd-soc-wm8750-objs := wm8750.o
snd-soc-wm8753-objs := wm8753.o
snd-soc-wm8776-objs := wm8776.o
+snd-soc-wm8804-objs := wm8804.o
snd-soc-wm8900-objs := wm8900.o
snd-soc-wm8903-objs := wm8903.o
snd-soc-wm8904-objs := wm8904.o
@@ -114,6 +115,7 @@ obj-$(CONFIG_SND_SOC_WM8741) += snd-soc-wm8741.o
obj-$(CONFIG_SND_SOC_WM8750) += snd-soc-wm8750.o
obj-$(CONFIG_SND_SOC_WM8753) += snd-soc-wm8753.o
obj-$(CONFIG_SND_SOC_WM8776) += snd-soc-wm8776.o
+obj-$(CONFIG_SND_SOC_WM8804) += snd-soc-wm8804.o
obj-$(CONFIG_SND_SOC_WM8900) += snd-soc-wm8900.o
obj-$(CONFIG_SND_SOC_WM8903) += snd-soc-wm8903.o
obj-$(CONFIG_SND_SOC_WM8904) += snd-soc-wm8904.o
diff --git a/sound/soc/codecs/wm8804.c b/sound/soc/codecs/wm8804.c
new file mode 100644
index 0000000..ca7d9ee
--- /dev/null
+++ b/sound/soc/codecs/wm8804.c
@@ -0,0 +1,820 @@
+/*
+ * wm8804.c -- WM8804 S/PDIF transceiver driver
+ *
+ * Copyright 2010 Wolfson Microelectronics plc
+ *
+ * Author: Dimitris Papastamos <dp at opensource.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/init.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/i2c.h>
+#include <linux/spi/spi.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.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 <sound/tlv.h>
+
+#include "wm8804.h"
+
+#define WM8804_NUM_SUPPLIES 2
+static const char *wm8804_supply_names[WM8804_NUM_SUPPLIES] = {
+ "PVDD",
+ "DVDD"
+};
+
+static const u8 wm8804_reg_defs[] = {
+ 0x05, /* R0 - RST/DEVID1 */
+ 0x88, /* R1 - DEVID2 */
+ 0x04, /* R2 - DEVREV */
+ 0x21, /* R3 - PLL1 */
+ 0xFD, /* R4 - PLL2 */
+ 0x36, /* R5 - PLL3 */
+ 0x07, /* R6 - PLL4 */
+ 0x16, /* R7 - PLL5 */
+ 0x18, /* R8 - PLL6 */
+ 0xFF, /* R9 - SPDMODE */
+ 0x00, /* R10 - INTMASK */
+ 0x00, /* R11 - INTSTAT */
+ 0x00, /* R12 - SPDSTAT */
+ 0x00, /* R13 - RXCHAN1 */
+ 0x00, /* R14 - RXCHAN2 */
+ 0x00, /* R15 - RXCHAN3 */
+ 0x00, /* R16 - RXCHAN4 */
+ 0x00, /* R17 - RXCHAN5 */
+ 0x00, /* R18 - SPDTX1 */
+ 0x00, /* R19 - SPDTX2 */
+ 0x00, /* R20 - SPDTX3 */
+ 0x71, /* R21 - SPDTX4 */
+ 0x0B, /* R22 - SPDTX5 */
+ 0x70, /* R23 - GPO0 */
+ 0x57, /* R24 - GPO1 */
+ 0x00, /* R25 */
+ 0x42, /* R26 - GPO2 */
+ 0x06, /* R27 - AIFTX */
+ 0x06, /* R28 - AIFRX */
+ 0x80, /* R29 - SPDRX1 */
+ 0x07, /* R30 - PWRDN */
+};
+
+struct wm8804_priv {
+ enum snd_soc_control_type control_type;
+ struct regulator_bulk_data supplies[WM8804_NUM_SUPPLIES];
+ struct notifier_block disable_nb[WM8804_NUM_SUPPLIES];
+ struct snd_soc_codec *codec;
+};
+
+static int txsrc_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol);
+
+static int txsrc_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol);
+
+/*
+ * We can't use the same notifier block for more than one supply and
+ * there's no way I can see to get from a callback to the caller
+ * except container_of().
+ */
+#define WM8804_REGULATOR_EVENT(n) \
+static int wm8804_regulator_event_##n(struct notifier_block *nb, \
+ unsigned long event, void *data) \
+{ \
+ struct wm8804_priv *wm8804 = container_of(nb, struct wm8804_priv, \
+ disable_nb[n]); \
+ if (event & REGULATOR_EVENT_DISABLE) { \
+ wm8804->codec->cache_sync = 1; \
+ } \
+ return 0; \
+}
+
+WM8804_REGULATOR_EVENT(0)
+WM8804_REGULATOR_EVENT(1)
+
+static const char *txsrc_text[] = { "S/PDIF RX", "AIF" };
+static const SOC_ENUM_SINGLE_EXT_DECL(txsrc, txsrc_text);
+
+static const struct snd_kcontrol_new wm8804_snd_controls[] = {
+ SOC_ENUM_EXT("Input Source", txsrc, txsrc_get, txsrc_put),
+ SOC_SINGLE("TX Playback Switch", WM8804_PWRDN, 2, 1, 1),
+ SOC_SINGLE("AIF Playback Switch", WM8804_PWRDN, 4, 1, 1)
+};
+
+static int txsrc_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec;
+ unsigned int src;
+
+ codec = snd_kcontrol_chip(kcontrol);
+ src = snd_soc_read(codec, WM8804_SPDTX4);
+ if (src & 0x40)
+ ucontrol->value.integer.value[0] = 1;
+ else
+ ucontrol->value.integer.value[0] = 0;
+
+ return 0;
+}
+
+static int txsrc_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_codec *codec;
+ unsigned int src, txpwr;
+
+ codec = snd_kcontrol_chip(kcontrol);
+
+ if (ucontrol->value.integer.value[0] != 0
+ && ucontrol->value.integer.value[0] != 1)
+ return -EINVAL;
+
+ src = snd_soc_read(codec, WM8804_SPDTX4);
+ switch ((src & 0x40) >> 6) {
+ case 0:
+ if (!ucontrol->value.integer.value[0])
+ return 0;
+ break;
+ case 1:
+ if (ucontrol->value.integer.value[1])
+ return 0;
+ break;
+ }
+
+ /* save the current power state of the transmitter */
+ txpwr = snd_soc_read(codec, WM8804_PWRDN) & 0x4;
+ /* power down the transmitter */
+ snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x4);
+ /* set the tx source */
+ snd_soc_update_bits(codec, WM8804_SPDTX4, 0x40,
+ ucontrol->value.integer.value[0] << 6);
+
+ if (ucontrol->value.integer.value[0]) {
+ /* power down the receiver */
+ snd_soc_update_bits(codec, WM8804_PWRDN, 0x2, 0x2);
+ /* power up the AIF */
+ snd_soc_update_bits(codec, WM8804_PWRDN, 0x10, 0);
+ } else {
+ /* don't power down the AIF -- may be used as an output */
+ /* power up the receiver */
+ snd_soc_update_bits(codec, WM8804_PWRDN, 0x2, 0);
+ }
+
+ /* restore the transmitter's configuration */
+ snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, txpwr);
+
+ return 0;
+}
+
+static int wm8804_volatile(unsigned int reg)
+{
+ switch (reg) {
+ case WM8804_RST_DEVID1:
+ case WM8804_DEVID2:
+ case WM8804_DEVREV:
+ case WM8804_INTSTAT:
+ case WM8804_SPDSTAT:
+ case WM8804_RXCHAN1:
+ case WM8804_RXCHAN2:
+ case WM8804_RXCHAN3:
+ case WM8804_RXCHAN4:
+ case WM8804_RXCHAN5:
+ return 1;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static int wm8804_reset(struct snd_soc_codec *codec)
+{
+ return snd_soc_write(codec, WM8804_RST_DEVID1, 0x0);
+}
+
+static int wm8804_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ struct snd_soc_codec *codec;
+ u16 format, master, bcp, lrp;
+
+ codec = dai->codec;
+
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ format = 0x2;
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ format = 0x0;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ format = 0x1;
+ break;
+ case SND_SOC_DAIFMT_DSP_A:
+ case SND_SOC_DAIFMT_DSP_B:
+ format = 0x3;
+ break;
+ default:
+ dev_err(dai->dev, "Unknown dai format\n");
+ return -EINVAL;
+ }
+
+ /* set data format */
+ snd_soc_update_bits(codec, WM8804_AIFTX, 0x3, format);
+ snd_soc_update_bits(codec, WM8804_AIFRX, 0x3, format);
+
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBM_CFM:
+ master = 1;
+ break;
+ case SND_SOC_DAIFMT_CBS_CFS:
+ master = 0;
+ break;
+ default:
+ dev_err(dai->dev, "Unknown master/slave configuration\n");
+ return -EINVAL;
+ }
+
+ /* set master/slave mode */
+ snd_soc_update_bits(codec, WM8804_AIFRX, 0x40, master << 6);
+
+ bcp = lrp = 0;
+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_NB_NF:
+ break;
+ case SND_SOC_DAIFMT_IB_IF:
+ bcp = lrp = 1;
+ break;
+ case SND_SOC_DAIFMT_IB_NF:
+ bcp = 1;
+ break;
+ case SND_SOC_DAIFMT_NB_IF:
+ lrp = 1;
+ break;
+ default:
+ dev_err(dai->dev, "Unknown polarity configuration\n");
+ return -EINVAL;
+ }
+
+ /* set frame inversion */
+ snd_soc_update_bits(codec, WM8804_AIFTX, 0x10 | 0x20,
+ (bcp << 4) | (lrp << 5));
+ snd_soc_update_bits(codec, WM8804_AIFRX, 0x10 | 0x20,
+ (bcp << 4) | (lrp << 5));
+ return 0;
+}
+
+static int wm8804_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_codec *codec;
+ u16 blen;
+
+ codec = dai->codec;
+
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ blen = 0x0;
+ break;
+ case SNDRV_PCM_FORMAT_S20_3LE:
+ blen = 0x1;
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ blen = 0x2;
+ break;
+ default:
+ dev_err(dai->dev, "Unsupported word length: %u\n",
+ params_format(params));
+ return -EINVAL;
+ }
+
+ /* set word length */
+ snd_soc_update_bits(codec, WM8804_AIFTX, 0xc, blen << 2);
+ snd_soc_update_bits(codec, WM8804_AIFRX, 0xc, blen << 2);
+
+ return 0;
+}
+
+struct pll_div {
+ u32 prescale:1;
+ u32 mclkdiv:1;
+ u32 freqmode:2;
+ u32 n:4;
+ u32 k:22;
+};
+
+/* PLL rate to output rate divisions */
+static struct {
+ unsigned int div;
+ unsigned int freqmode;
+ unsigned int mclkdiv;
+} post_table[] = {
+ { 2, 0, 0 },
+ { 4, 0, 1 },
+ { 4, 1, 0 },
+ { 8, 1, 1 },
+ { 8, 2, 0 },
+ { 16, 2, 1 },
+ { 12, 3, 0 },
+ { 24, 3, 1 }
+};
+
+#define FIXED_PLL_SIZE ((1ULL << 22) * 10)
+static int pll_factors(struct pll_div *pll_div, unsigned int target,
+ unsigned int source)
+{
+ u64 Kpart;
+ unsigned long int K, Ndiv, Nmod, tmp;
+ int i;
+
+ /*
+ * Scale the output frequency up; the PLL should run in the
+ * region of 90-100MHz.
+ */
+ for (i = 0; i < ARRAY_SIZE(post_table); i++) {
+ tmp = target * post_table[i].div;
+ if (tmp >= 90000000 && tmp <= 100000000) {
+ pll_div->freqmode = post_table[i].freqmode;
+ pll_div->mclkdiv = post_table[i].mclkdiv;
+ target *= post_table[i].div;
+ break;
+ }
+ }
+
+ if (i == ARRAY_SIZE(post_table)) {
+ pr_err("%s: Unable to scale output frequency: %uHz\n",
+ __func__, target);
+ return -EINVAL;
+ }
+
+ pll_div->prescale = 0;
+ Ndiv = target / source;
+ if (Ndiv < 5) {
+ source >>= 1;
+ pll_div->prescale = 1;
+ Ndiv = target / source;
+ }
+
+ if (Ndiv < 5 || Ndiv > 13) {
+ pr_err("%s: WM8804 N value is not within the recommended range: %lu\n",
+ __func__, Ndiv);
+ return -EINVAL;
+ }
+ pll_div->n = Ndiv;
+
+ Nmod = target % source;
+ Kpart = FIXED_PLL_SIZE * (u64)Nmod;
+
+ do_div(Kpart, source);
+
+ K = Kpart & 0xffffffff;
+ if ((K % 10) >= 5)
+ K += 5;
+ K /= 10;
+ pll_div->k = K;
+
+ return 0;
+}
+
+static int wm8804_set_pll(struct snd_soc_dai *dai, int pll_id,
+ int source, unsigned int freq_in,
+ unsigned int freq_out)
+{
+ int ret;
+ struct snd_soc_codec *codec;
+ struct pll_div pll_div = { 0 };
+
+ codec = dai->codec;
+ if (freq_in && freq_out) {
+ ret = pll_factors(&pll_div, freq_out, freq_in);
+ if (ret)
+ return ret;
+ }
+
+ /* power down the PLL before reprogramming it */
+ snd_soc_update_bits(codec, WM8804_PWRDN, 0x1, 0);
+
+ if (!freq_in || !freq_out)
+ return 0;
+
+ /* set PLLN and PRESCALE */
+ snd_soc_update_bits(codec, WM8804_PLL4, 0xf | 0x10,
+ pll_div.n | (pll_div.prescale << 4));
+ /* set mclkdiv and freqmode */
+ snd_soc_update_bits(codec, WM8804_PLL5, 0x3 | 0x8,
+ pll_div.freqmode | (pll_div.mclkdiv << 3));
+ /* set PLLK */
+ snd_soc_write(codec, WM8804_PLL1, pll_div.k & 0xff);
+ snd_soc_write(codec, WM8804_PLL2, (pll_div.k >> 8) & 0xff);
+ snd_soc_write(codec, WM8804_PLL3, pll_div.k >> 16);
+
+ /* power up the PLL */
+ snd_soc_update_bits(codec, WM8804_PWRDN, 0x1, 0x1);
+
+ return 0;
+}
+
+static int wm8804_set_sysclk(struct snd_soc_dai *dai,
+ int clk_id, unsigned int freq, int dir)
+{
+ struct snd_soc_codec *codec;
+
+ codec = dai->codec;
+
+ switch (clk_id) {
+ case WM8804_TX_CLKSRC_MCLK:
+ if ((freq >= 10000000 && freq <= 14400000)
+ || (freq >= 16280000 && freq <= 27000000))
+ snd_soc_update_bits(codec, WM8804_PLL6, 0x80, 0x80);
+ else {
+ dev_err(dai->dev, "OSCCLOCK is not within the "
+ "recommended range: %uHz\n", freq);
+ return -EINVAL;
+ }
+ break;
+ case WM8804_TX_CLKSRC_PLL:
+ snd_soc_update_bits(codec, WM8804_PLL6, 0x80, 0);
+ break;
+ case WM8804_CLKOUT_SRC_CLK1:
+ snd_soc_update_bits(codec, WM8804_PLL6, 0x8, 0);
+ break;
+ case WM8804_CLKOUT_SRC_OSCCLK:
+ snd_soc_update_bits(codec, WM8804_PLL6, 0x8, 0x8);
+ break;
+ default:
+ dev_err(dai->dev, "Unknown clock source: %d\n", clk_id);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int wm8804_set_clkdiv(struct snd_soc_dai *dai,
+ int div_id, int div)
+{
+ struct snd_soc_codec *codec;
+
+ codec = dai->codec;
+ switch (div_id) {
+ case WM8804_CLKOUT_DIV:
+ snd_soc_update_bits(codec, WM8804_PLL5, 0x30,
+ (div & 0x3) << 4);
+ break;
+ default:
+ dev_err(dai->dev, "Unknown clock divider: %d\n", div_id);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static void wm8804_sync_cache(struct snd_soc_codec *codec)
+{
+ short i;
+ u8 *cache;
+
+ if (!codec->cache_sync)
+ return;
+
+ codec->cache_only = 0;
+ cache = codec->reg_cache;
+ for (i = 0; i < codec->driver->reg_cache_size; i++) {
+ if (i == WM8804_RST_DEVID1 || cache[i] == wm8804_reg_defs[i])
+ continue;
+ snd_soc_write(codec, i, cache[i]);
+ }
+ codec->cache_sync = 0;
+}
+
+static int wm8804_set_bias_level(struct snd_soc_codec *codec,
+ enum snd_soc_bias_level level)
+{
+ int ret;
+ struct wm8804_priv *wm8804;
+
+ wm8804 = snd_soc_codec_get_drvdata(codec);
+ switch (level) {
+ case SND_SOC_BIAS_ON:
+ break;
+ case SND_SOC_BIAS_PREPARE:
+ /* power up the OSC and the PLL */
+ snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0);
+ break;
+ case SND_SOC_BIAS_STANDBY:
+ if (codec->bias_level == SND_SOC_BIAS_OFF) {
+ ret = regulator_bulk_enable(ARRAY_SIZE(wm8804->supplies),
+ wm8804->supplies);
+ if (ret) {
+ dev_err(codec->dev,
+ "Failed to enable supplies: %d\n",
+ ret);
+ return ret;
+ }
+ wm8804_sync_cache(codec);
+ }
+ /* power down the OSC and the PLL */
+ snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0x9);
+ break;
+ case SND_SOC_BIAS_OFF:
+ /* power down the OSC and the PLL */
+ snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0x9);
+ regulator_bulk_disable(ARRAY_SIZE(wm8804->supplies),
+ wm8804->supplies);
+ break;
+ }
+
+ codec->bias_level = level;
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int wm8804_suspend(struct snd_soc_codec *codec, pm_message_t state)
+{
+ wm8804_set_bias_level(codec, SND_SOC_BIAS_OFF);
+ return 0;
+}
+
+static int wm8804_resume(struct snd_soc_codec *codec)
+{
+ wm8804_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+ return 0;
+}
+#else
+#define wm8804_suspend NULL
+#define wm8804_resume NULL
+#endif
+
+static int wm8804_remove(struct snd_soc_codec *codec)
+{
+ struct wm8804_priv *wm8804;
+ int i;
+
+ wm8804 = snd_soc_codec_get_drvdata(codec);
+ wm8804_set_bias_level(codec, SND_SOC_BIAS_OFF);
+
+ for (i = 0; i < ARRAY_SIZE(wm8804->supplies); ++i)
+ regulator_unregister_notifier(wm8804->supplies[i].consumer,
+ &wm8804->disable_nb[i]);
+ regulator_bulk_free(ARRAY_SIZE(wm8804->supplies), wm8804->supplies);
+ return 0;
+}
+
+static int wm8804_probe(struct snd_soc_codec *codec)
+{
+ struct wm8804_priv *wm8804;
+ int i, id1, id2, ret;
+
+ wm8804 = snd_soc_codec_get_drvdata(codec);
+ wm8804->codec = codec;
+
+ codec->idle_bias_off = 1;
+
+ ret = snd_soc_codec_set_cache_io(codec, 8, 8, wm8804->control_type);
+ if (ret < 0) {
+ dev_err(codec->dev, "Failed to set cache i/o: %d\n", ret);
+ return ret;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(wm8804->supplies); i++)
+ wm8804->supplies[i].supply = wm8804_supply_names[i];
+
+ ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8804->supplies),
+ wm8804->supplies);
+ if (ret) {
+ dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
+ return ret;
+ }
+
+ wm8804->disable_nb[0].notifier_call = wm8804_regulator_event_0;
+ wm8804->disable_nb[1].notifier_call = wm8804_regulator_event_1;
+
+ /* This should really be moved into the regulator core */
+ for (i = 0; i < ARRAY_SIZE(wm8804->supplies); i++) {
+ ret = regulator_register_notifier(wm8804->supplies[i].consumer,
+ &wm8804->disable_nb[i]);
+ if (ret != 0) {
+ dev_err(codec->dev,
+ "Failed to register regulator notifier: %d\n",
+ ret);
+ }
+ }
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(wm8804->supplies),
+ wm8804->supplies);
+ if (ret) {
+ dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
+ goto err_reg_get;
+ }
+
+ id1 = snd_soc_read(codec, WM8804_RST_DEVID1);
+ if (id1 < 0) {
+ dev_err(codec->dev, "Failed to read device ID: %d\n", id1);
+ ret = id1;
+ goto err_reg_enable;
+ }
+
+ id2 = snd_soc_read(codec, WM8804_DEVID2);
+ if (id2 < 0) {
+ dev_err(codec->dev, "Failed to read device ID: %d\n", id2);
+ ret = id2;
+ goto err_reg_enable;
+ }
+
+ id2 = (id2 << 8) | id1;
+
+ if (id2 != ((wm8804_reg_defs[WM8804_DEVID2] << 8)
+ | wm8804_reg_defs[WM8804_RST_DEVID1])) {
+ dev_err(codec->dev, "Invalid device ID: %#x\n", id2);
+ ret = -EINVAL;
+ goto err_reg_enable;
+ }
+
+ ret = wm8804_reset(codec);
+ if (ret < 0) {
+ dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
+ goto err_reg_enable;
+ }
+
+ wm8804_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
+
+ snd_soc_add_controls(codec, wm8804_snd_controls,
+ ARRAY_SIZE(wm8804_snd_controls));
+ return 0;
+
+err_reg_enable:
+ regulator_bulk_disable(ARRAY_SIZE(wm8804->supplies), wm8804->supplies);
+err_reg_get:
+ regulator_bulk_free(ARRAY_SIZE(wm8804->supplies), wm8804->supplies);
+ return ret;
+}
+
+static struct snd_soc_dai_ops wm8804_dai_ops = {
+ .hw_params = wm8804_hw_params,
+ .set_fmt = wm8804_set_fmt,
+ .set_sysclk = wm8804_set_sysclk,
+ .set_clkdiv = wm8804_set_clkdiv,
+ .set_pll = wm8804_set_pll
+};
+
+#define WM8804_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
+ SNDRV_PCM_FMTBIT_S24_LE)
+
+static struct snd_soc_dai_driver wm8804_dai = {
+ .name = "wm8804-s/pdif",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_192000,
+ .formats = WM8804_FORMATS,
+ },
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_192000,
+ .formats = WM8804_FORMATS,
+ },
+ .ops = &wm8804_dai_ops,
+ .symmetric_rates = 1
+};
+
+static struct snd_soc_codec_driver soc_codec_dev_wm8804 = {
+ .probe = wm8804_probe,
+ .remove = wm8804_remove,
+ .suspend = wm8804_suspend,
+ .resume = wm8804_resume,
+ .set_bias_level = wm8804_set_bias_level,
+ .reg_cache_size = ARRAY_SIZE(wm8804_reg_defs),
+ .reg_word_size = sizeof(u8),
+ .reg_cache_default = wm8804_reg_defs,
+ .volatile_register = wm8804_volatile
+};
+
+#if defined(CONFIG_SPI_MASTER)
+static int __devinit wm8804_spi_probe(struct spi_device *spi)
+{
+ struct wm8804_priv *wm8804;
+ int ret;
+
+ wm8804 = kzalloc(sizeof *wm8804, GFP_KERNEL);
+ if (IS_ERR(wm8804))
+ return PTR_ERR(wm8804);
+
+ wm8804->control_type = SND_SOC_SPI;
+ spi_set_drvdata(spi, wm8804);
+
+ ret = snd_soc_register_codec(&spi->dev,
+ &soc_codec_dev_wm8804, &wm8804_dai, 1);
+ if (ret < 0)
+ kfree(wm8804);
+ return ret;
+}
+
+static int __devexit wm8804_spi_remove(struct spi_device *spi)
+{
+ snd_soc_unregister_codec(&spi->dev);
+ kfree(spi_get_drvdata(spi));
+ return 0;
+}
+
+static struct spi_driver wm8804_spi_driver = {
+ .driver = {
+ .name = "wm8804",
+ .owner = THIS_MODULE,
+ },
+ .probe = wm8804_spi_probe,
+ .remove = __devexit_p(wm8804_spi_remove)
+};
+#endif
+
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+static __devinit int wm8804_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct wm8804_priv *wm8804;
+ int ret;
+
+ wm8804 = kzalloc(sizeof *wm8804, GFP_KERNEL);
+ if (IS_ERR(wm8804))
+ return PTR_ERR(wm8804);
+
+ wm8804->control_type = SND_SOC_I2C;
+ i2c_set_clientdata(i2c, wm8804);
+
+ ret = snd_soc_register_codec(&i2c->dev,
+ &soc_codec_dev_wm8804, &wm8804_dai, 1);
+ if (ret < 0)
+ kfree(wm8804);
+ return ret;
+}
+
+static __devexit int wm8804_i2c_remove(struct i2c_client *client)
+{
+ snd_soc_unregister_codec(&client->dev);
+ kfree(i2c_get_clientdata(client));
+ return 0;
+}
+
+static const struct i2c_device_id wm8804_i2c_id[] = {
+ { "wm8804", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, wm8804_i2c_id);
+
+static struct i2c_driver wm8804_i2c_driver = {
+ .driver = {
+ .name = "wm8804",
+ .owner = THIS_MODULE,
+ },
+ .probe = wm8804_i2c_probe,
+ .remove = __devexit_p(wm8804_i2c_remove),
+ .id_table = wm8804_i2c_id
+};
+#endif
+
+static int __init wm8804_modinit(void)
+{
+ int ret = 0;
+
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+ ret = i2c_add_driver(&wm8804_i2c_driver);
+ if (ret) {
+ printk(KERN_ERR "Failed to register wm8804 I2C driver: %d\n",
+ ret);
+ }
+#endif
+#if defined(CONFIG_SPI_MASTER)
+ ret = spi_register_driver(&wm8804_spi_driver);
+ if (ret != 0) {
+ printk(KERN_ERR "Failed to register wm8804 SPI driver: %d\n",
+ ret);
+ }
+#endif
+ return ret;
+}
+module_init(wm8804_modinit);
+
+static void __exit wm8804_exit(void)
+{
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+ i2c_del_driver(&wm8804_i2c_driver);
+#endif
+#if defined(CONFIG_SPI_MASTER)
+ spi_unregister_driver(&wm8804_spi_driver);
+#endif
+}
+module_exit(wm8804_exit);
+
+MODULE_DESCRIPTION("ASoC WM8804 driver");
+MODULE_AUTHOR("Dimitris Papastamos <dp at opensource.wolfsonmicro.com>");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/codecs/wm8804.h b/sound/soc/codecs/wm8804.h
new file mode 100644
index 0000000..8ec14f5
--- /dev/null
+++ b/sound/soc/codecs/wm8804.h
@@ -0,0 +1,61 @@
+/*
+ * wm8804.h -- WM8804 S/PDIF transceiver driver
+ *
+ * Copyright 2010 Wolfson Microelectronics plc
+ *
+ * Author: Dimitris Papastamos <dp at opensource.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.
+ */
+
+#ifndef _WM8804_H
+#define _WM8804_H
+
+/*
+ * Register values.
+ */
+#define WM8804_RST_DEVID1 0x00
+#define WM8804_DEVID2 0x01
+#define WM8804_DEVREV 0x02
+#define WM8804_PLL1 0x03
+#define WM8804_PLL2 0x04
+#define WM8804_PLL3 0x05
+#define WM8804_PLL4 0x06
+#define WM8804_PLL5 0x07
+#define WM8804_PLL6 0x08
+#define WM8804_SPDMODE 0x09
+#define WM8804_INTMASK 0x0A
+#define WM8804_INTSTAT 0x0B
+#define WM8804_SPDSTAT 0x0C
+#define WM8804_RXCHAN1 0x0D
+#define WM8804_RXCHAN2 0x0E
+#define WM8804_RXCHAN3 0x0F
+#define WM8804_RXCHAN4 0x10
+#define WM8804_RXCHAN5 0x11
+#define WM8804_SPDTX1 0x12
+#define WM8804_SPDTX2 0x13
+#define WM8804_SPDTX3 0x14
+#define WM8804_SPDTX4 0x15
+#define WM8804_SPDTX5 0x16
+#define WM8804_GPO0 0x17
+#define WM8804_GPO1 0x18
+#define WM8804_GPO2 0x1A
+#define WM8804_AIFTX 0x1B
+#define WM8804_AIFRX 0x1C
+#define WM8804_SPDRX1 0x1D
+#define WM8804_PWRDN 0x1E
+
+#define WM8804_REGISTER_COUNT 30
+#define WM8804_MAX_REGISTER 0x1E
+
+#define WM8804_TX_CLKSRC_MCLK 1
+#define WM8804_TX_CLKSRC_PLL 2
+
+#define WM8804_CLKOUT_SRC_CLK1 3
+#define WM8804_CLKOUT_SRC_OSCCLK 4
+
+#define WM8804_CLKOUT_DIV 1
+
+#endif /* _WM8804_H */
--
1.7.3
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