Re: [alsa-devel] [PATCH 3/3] ALSA SoC: Add Texas Instruments TLV320AIC26 codec driver

On Tue, 2008-07-01 at 17:53 -0600, Grant Likely wrote:

From: Grant Likely grant.likely@secretlab.ca

ASoC Codec driver for the TLV320AIC26 device. This driver uses the ASoC v1 API, so I don't expect it to get merged as-is, but I want to get it out there for review.

---

sound/soc/codecs/Kconfig | 4 sound/soc/codecs/Makefile | 2 sound/soc/codecs/tlv320aic26.c | 630 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 636 insertions(+), 0 deletions(-)

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index 3903ab7..96c7bfe 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -41,6 +41,10 @@ config SND_SOC_CS4270_VD33_ERRATA bool depends on SND_SOC_CS4270

+config SND_SOC_TLV320AIC26

• tristate "TI TLB320AIC26 Codec support"
• depends on SND_SOC && SPI

config SND_SOC_TLV320AIC3X tristate depends on SND_SOC && I2C diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile index 4e1314c..ec0cd93 100644 --- a/sound/soc/codecs/Makefile +++ b/sound/soc/codecs/Makefile @@ -5,6 +5,7 @@ snd-soc-wm8753-objs := wm8753.o snd-soc-wm9712-objs := wm9712.o snd-soc-wm9713-objs := wm9713.o snd-soc-cs4270-objs := cs4270.o +snd-soc-tlv320aic26-objs := tlv320aic26.o snd-soc-tlv320aic3x-objs := tlv320aic3x.o

obj-$(CONFIG_SND_SOC_AC97_CODEC) += snd-soc-ac97.o @@ -14,4 +15,5 @@ obj-$(CONFIG_SND_SOC_WM8753) += snd-soc-wm8753.o obj-$(CONFIG_SND_SOC_WM9712) += snd-soc-wm9712.o obj-$(CONFIG_SND_SOC_WM9713) += snd-soc-wm9713.o obj-$(CONFIG_SND_SOC_CS4270) += snd-soc-cs4270.o +obj-$(CONFIG_SND_SOC_TLV320AIC26) += snd-soc-tlv320aic26.o obj-$(CONFIG_SND_SOC_TLV320AIC3X) += snd-soc-tlv320aic3x.o diff --git a/sound/soc/codecs/tlv320aic26.c b/sound/soc/codecs/tlv320aic26.c new file mode 100644 index 0000000..aee1dbc --- /dev/null +++ b/sound/soc/codecs/tlv320aic26.c @@ -0,0 +1,630 @@ +/*

• • Texas Instruments TLV320AIC26 low power audio CODEC
• • ALSA SoC CODEC driver
• • Copyright (C) 2008 Secret Lab Technologies Ltd.
• */

+#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/pm.h> +#include <linux/device.h> +#include <linux/sysfs.h> +#include <linux/spi/spi.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/soc-of.h> +#include <sound/initval.h>

+MODULE_DESCRIPTION("ASoC TLV320AIC26 codec driver"); +MODULE_AUTHOR("Grant Likely grant.likely@secretlab.ca"); +MODULE_LICENSE("GPL");

+/* AIC26 Registers */ +#define AIC26_READ_COMMAND_WORD(addr) ((1 << 15) | (addr << 5)) +#define AIC26_WRITE_COMMAND_WORD(addr) ((0 << 15) | (addr << 5)) +#define AIC26_PAGE_ADDR(page, offset) ((page << 6) | offset) +#define AIC26_NUM_REGS AIC26_PAGE_ADDR(3, 0) +#define AIC26_REG_CACHE_SIZE (0x20) /* only page 2 cached */ +#define AIC26_REG_IS_CACHED(addr) ((addr & ~0x1f) == (2 << 6)) +#define AIC26_REG_CACHE_ADDR(addr) (addr & 0x1f)

+/* Page 0: Auxillary data registers */ +#define AIC26_REG_BAT1 AIC26_PAGE_ADDR(0, 0x05) +#define AIC26_REG_BAT2 AIC26_PAGE_ADDR(0, 0x06) +#define AIC26_REG_AUX AIC26_PAGE_ADDR(0, 0x07) +#define AIC26_REG_TEMP1 AIC26_PAGE_ADDR(0, 0x09) +#define AIC26_REG_TEMP2 AIC26_PAGE_ADDR(0, 0x0A)

+/* Page 1: Auxillary control registers */ +#define AIC26_REG_AUX_ADC AIC26_PAGE_ADDR(1, 0x00) +#define AIC26_REG_STATUS AIC26_PAGE_ADDR(1, 0x01) +#define AIC26_REG_REFERENCE AIC26_PAGE_ADDR(1, 0x03) +#define AIC26_REG_RESET AIC26_PAGE_ADDR(1, 0x04)

+/* Page 2: Audio control registers */ +#define AIC26_REG_AUDIO_CTRL1 AIC26_PAGE_ADDR(2, 0x00) +#define AIC26_REG_ADC_GAIN AIC26_PAGE_ADDR(2, 0x01) +#define AIC26_REG_DAC_GAIN AIC26_PAGE_ADDR(2, 0x02) +#define AIC26_REG_SIDETONE AIC26_PAGE_ADDR(2, 0x03) +#define AIC26_REG_AUDIO_CTRL2 AIC26_PAGE_ADDR(2, 0x04) +#define AIC26_REG_POWER_CTRL AIC26_PAGE_ADDR(2, 0x05) +#define AIC26_REG_AUDIO_CTRL3 AIC26_PAGE_ADDR(2, 0x06)

+#define AIC26_REG_FILTER_COEFF_L_N0 AIC26_PAGE_ADDR(2, 0x07) +#define AIC26_REG_FILTER_COEFF_L_N1 AIC26_PAGE_ADDR(2, 0x08) +#define AIC26_REG_FILTER_COEFF_L_N2 AIC26_PAGE_ADDR(2, 0x09) +#define AIC26_REG_FILTER_COEFF_L_N3 AIC26_PAGE_ADDR(2, 0x0A) +#define AIC26_REG_FILTER_COEFF_L_N4 AIC26_PAGE_ADDR(2, 0x0B) +#define AIC26_REG_FILTER_COEFF_L_N5 AIC26_PAGE_ADDR(2, 0x0C) +#define AIC26_REG_FILTER_COEFF_L_D1 AIC26_PAGE_ADDR(2, 0x0D) +#define AIC26_REG_FILTER_COEFF_L_D2 AIC26_PAGE_ADDR(2, 0x0E) +#define AIC26_REG_FILTER_COEFF_L_D4 AIC26_PAGE_ADDR(2, 0x0F) +#define AIC26_REG_FILTER_COEFF_L_D5 AIC26_PAGE_ADDR(2, 0x10) +#define AIC26_REG_FILTER_COEFF_R_N0 AIC26_PAGE_ADDR(2, 0x11) +#define AIC26_REG_FILTER_COEFF_R_N1 AIC26_PAGE_ADDR(2, 0x12) +#define AIC26_REG_FILTER_COEFF_R_N2 AIC26_PAGE_ADDR(2, 0x13) +#define AIC26_REG_FILTER_COEFF_R_N3 AIC26_PAGE_ADDR(2, 0x14) +#define AIC26_REG_FILTER_COEFF_R_N4 AIC26_PAGE_ADDR(2, 0x15) +#define AIC26_REG_FILTER_COEFF_R_N5 AIC26_PAGE_ADDR(2, 0x16) +#define AIC26_REG_FILTER_COEFF_R_D1 AIC26_PAGE_ADDR(2, 0x17) +#define AIC26_REG_FILTER_COEFF_R_D2 AIC26_PAGE_ADDR(2, 0x18) +#define AIC26_REG_FILTER_COEFF_R_D4 AIC26_PAGE_ADDR(2, 0x19) +#define AIC26_REG_FILTER_COEFF_R_D5 AIC26_PAGE_ADDR(2, 0x1A)

+#define AIC26_REG_PLL_PROG1 AIC26_PAGE_ADDR(2, 0x1B) +#define AIC26_REG_PLL_PROG2 AIC26_PAGE_ADDR(2, 0x1C) +#define AIC26_REG_AUDIO_CTRL4 AIC26_PAGE_ADDR(2, 0x1D) +#define AIC26_REG_AUDIO_CTRL5 AIC26_PAGE_ADDR(2, 0x1E)

+#define AIC26_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\

• 	 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
  

• 	 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
  

• 	 SNDRV_PCM_RATE_48000)
  

+#define AIC26_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE |\

• 	 SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE)
  

Fwiw, I usually put all the codec registers defs in a separate header just in case we need to do any codec stuff in the machine driver.

+/* fsref dividers; used in register 'Audio Control 1' */ +enum aic26_divisors {

• AIC26_DIV_1 = 0,
• AIC26_DIV_1_5 = 1,
• AIC26_DIV_2 = 2,
• AIC26_DIV_3 = 3,
• AIC26_DIV_4 = 4,
• AIC26_DIV_5 = 5,
• AIC26_DIV_5_5 = 6,
• AIC26_DIV_6 = 7,

+};

+/* Digital data format */ +enum aic26_datfm {

• AIC26_DATFM_I2S = 0 << 8,
• AIC26_DATFM_DSP = 1 << 8,
• AIC26_DATFM_RIGHTJ = 2 << 8, /* right justified */
• AIC26_DATFM_LEFTJ = 3 << 8, /* left justified */

+};

+/* Sample word length in bits; used in register 'Audio Control 1' */ +enum aic26_wlen {

• AIC26_WLEN_16 = 0 << 10,
• AIC26_WLEN_20 = 1 << 10,
• AIC26_WLEN_24 = 2 << 10,
• AIC26_WLEN_32 = 3 << 10,

+};

+/* AIC26 driver private data */ +struct aic26 {

• struct spi_device *spi;
• struct snd_soc_codec codec;
• u16 reg_cache[AIC26_REG_CACHE_SIZE]; /* shadow registers */
• int master;
• int datfm;
• int mclk;
• /* Keyclick parameters */
• int keyclick_amplitude;
• int keyclick_freq;
• int keyclick_len;

+};

+/* ---------------------------------------------------------------------

• • Register access routines
• */

+static unsigned int aic26_reg_read(struct snd_soc_codec *codec,

• 		   unsigned int reg)
  

+{

• struct aic26 *aic26 = codec->private_data;
• u16 *cache = codec->reg_cache;
• u16 cmd, value;
• u8 buffer[2];
• int rc;
• if ((reg < 0) || (reg >= AIC26_NUM_REGS)) {

• WARN_ON_ONCE(1);
  

• return 0;
  

• }
• /* Do SPI transfer; first 16bits are command; remaining is

• * register contents */
  

• cmd = AIC26_READ_COMMAND_WORD(reg);
• buffer[0] = (cmd >> 8) & 0xff;
• buffer[1] = cmd & 0xff;
• rc = spi_write_then_read(aic26->spi, buffer, 2, buffer, 2);
• if (rc) {

• dev_err(&aic26->spi->dev, "AIC26 reg read error\n");
  

• return -EIO;
  

• }
• value = (buffer[0] << 8) | buffer[1];
• /* Update the cache before returning with the value */
• if (AIC26_REG_IS_CACHED(reg))

• cache[AIC26_REG_CACHE_ADDR(reg)] = value;
  

• return value;

+}

+static unsigned int aic26_reg_read_cache(struct snd_soc_codec *codec,

• 			 unsigned int reg)
  

+{

• u16 *cache = codec->reg_cache;
• if ((reg < 0) || (reg >= AIC26_NUM_REGS)) {

• WARN_ON_ONCE(1);
  

• return 0;
  

• }
• if (AIC26_REG_IS_CACHED(reg))

• return cache[AIC26_REG_CACHE_ADDR(reg)];
  

• return aic26_reg_read(codec, reg);

+}

+static int aic26_reg_write(struct snd_soc_codec *codec, unsigned int reg,

•            unsigned int value)
  

+{

• struct aic26 *aic26 = codec->private_data;
• u16 *cache = codec->reg_cache;
• u16 cmd;
• u8 buffer[4];
• int rc;
• if ((reg < 0) || (reg >= AIC26_NUM_REGS)) {

• WARN_ON_ONCE(1);
  

• return -EINVAL;
  

• }
• /* Do SPI transfer; first 16bits are command; remaining is data

• * to write into register */
  

• cmd = AIC26_WRITE_COMMAND_WORD(reg);
• buffer[0] = (cmd >> 8) & 0xff;
• buffer[1] = cmd & 0xff;
• buffer[2] = value >> 8;
• buffer[3] = value;
• rc = spi_write(aic26->spi, buffer, 4);
• if (rc) {

• dev_err(&aic26->spi->dev, "AIC26 reg read error\n");
  

• return -EIO;
  

• }
• /* update cache before returning */
• if (AIC26_REG_IS_CACHED(reg))

• cache[AIC26_REG_CACHE_ADDR(reg)] = value;
  

• return 0;

+}

+/* ---------------------------------------------------------------------

• • Digital Audio Interface Operations
• */

+static int aic26_hw_params(struct snd_pcm_substream *substream,

• 	   struct snd_pcm_hw_params *params)
  

+{

• struct snd_soc_pcm_runtime *rtd = substream->private_data;
• struct snd_soc_device *socdev = rtd->socdev;
• struct snd_soc_codec *codec = socdev->codec;
• struct aic26 *aic26 = codec->private_data;
• int fsref, divisor, wlen, pval, jval, dval, qval;
• u16 reg;
• dev_dbg(&aic26->spi->dev, "aic26_hw_params(substream=%p, params=%p)\n",

• substream, params);
  

• dev_dbg(&aic26->spi->dev, "rate=%i format=%i\n", params_rate(params),

• params_format(params));
  

• switch (params_rate(params)) {

• case 8000: fsref = 48000; divisor = AIC26_DIV_6; break;
  

• case 11025: fsref = 44100; divisor = AIC26_DIV_4; break;
  

• case 12000: fsref = 48000; divisor = AIC26_DIV_4; break;
  

• case 16000: fsref = 48000; divisor = AIC26_DIV_3; break;
  

• case 22050: fsref = 44100; divisor = AIC26_DIV_2; break;
  

• case 24000: fsref = 48000; divisor = AIC26_DIV_2; break;
  

• case 32000: fsref = 48000; divisor = AIC26_DIV_1_5; break;
  

• case 44100: fsref = 44100; divisor = AIC26_DIV_1; break;
  

• case 48000: fsref = 48000; divisor = AIC26_DIV_1; break;
  

• default: dev_dbg(&aic26->spi->dev, "bad rate\n"); return -EINVAL;
  

• }

Indentation.

• /* select data word length */
• switch (params_format(params)) {

• case SNDRV_PCM_FORMAT_S8: wlen = AIC26_WLEN_16; break;
  

• case SNDRV_PCM_FORMAT_S16_BE: wlen = AIC26_WLEN_16; break;
  

• case SNDRV_PCM_FORMAT_S24_BE: wlen = AIC26_WLEN_24; break;
  

• case SNDRV_PCM_FORMAT_S32_BE: wlen = AIC26_WLEN_32; break;
  

• default: dev_dbg(&aic26->spi->dev, "bad format\n"); return -EINVAL;
  

• }

ditto.

• /* Configure PLL */
• pval = 1;
• jval = (fsref == 44100) ? 7 : 8;
• dval = (fsref == 44100) ? 5264 : 1920;
• qval = 0;
• reg = 0x8000 | qval << 11 | pval << 8 | jval << 2;
• aic26_reg_write(codec, AIC26_REG_PLL_PROG1, reg);
• reg = dval << 2;
• aic26_reg_write(codec, AIC26_REG_PLL_PROG2, reg);

PLL/FLL/clock config is usually done in a separate function (codec_set_pll(), callable by machine driver) so that we can change clocks depending on the available machine clocks and srate.

• /* Power up CODEC */
• aic26_reg_write(codec, AIC26_REG_POWER_CTRL, 0);

Codec domain (i.e Bias power) PM stuff should be done in codec_dapm_event(). This allows us to power the codec on when we do things like sidetone (with no active playback or capture stream).

• /* Audio Control 3 (master mode, fsref rate) */
• reg = aic26_reg_read_cache(codec, AIC26_REG_AUDIO_CTRL3);
• reg &= ~0xf800;
• if (aic26->master)

• reg |= 0x0800;
  

• if (fsref == 48000)

• reg |= 0x2000;
  

• aic26_reg_write(codec, AIC26_REG_AUDIO_CTRL3, reg);
• /* Audio Control 1 (FSref divisor) */
• reg = aic26_reg_read_cache(codec, AIC26_REG_AUDIO_CTRL1);
• reg &= ~0x0fff;
• reg |= wlen | aic26->datfm | (divisor << 3) | divisor;
• aic26_reg_write(codec, AIC26_REG_AUDIO_CTRL1, reg);
• return 0;

+}

+/**

• • aic26_mute - Mute control to reduce noise when changing audio format
• */

+static int aic26_mute(struct snd_soc_codec_dai *dai, int mute) +{

• struct snd_soc_codec *codec = dai->codec;
• struct aic26 *aic26 = codec->private_data;
• u16 reg = aic26_reg_read_cache(codec, AIC26_REG_DAC_GAIN);
• dev_dbg(&aic26->spi->dev, "aic26_mute(dai=%p, mute=%i)\n",

• dai, mute);
  

• if (mute)

• reg |= 0x8080;
  

• else

• reg &= ~0x8080;
  

• aic26_reg_write(codec, AIC26_REG_DAC_GAIN, reg);
• return 0;

+}

+static int aic26_set_sysclk(struct snd_soc_codec_dai *codec_dai,

• 	    int clk_id, unsigned int freq, int dir)
  

+{

• struct snd_soc_codec *codec = codec_dai->codec;
• struct aic26 *aic26 = codec->private_data;
• dev_dbg(&aic26->spi->dev, "aic26_set_sysclk(dai=%p, clk_id==%i,"

• " freq=%i, dir=%i)\n",
  

• codec_dai, clk_id, freq, dir);
  

• /* MCLK needs to fall between 2MHz and 50 MHz */
• if ((freq < 2000000) || (freq > 50000000))

• return -EINVAL;
  

• aic26->mclk = freq;
• return 0;

+}

+static int aic26_set_fmt(struct snd_soc_codec_dai *codec_dai, unsigned int fmt) +{

• struct snd_soc_codec *codec = codec_dai->codec;
• struct aic26 *aic26 = codec->private_data;
• dev_dbg(&aic26->spi->dev, "aic26_set_fmt(dai=%p, fmt==%i)\n",

• codec_dai, fmt);
  

• /* set master/slave audio interface */
• switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {

• case SND_SOC_DAIFMT_CBM_CFM: aic26->master = 1; break;
  

• //case SND_SOC_DAIFMT_CBS_CFS: aic26->master = 0; break;
  

• default: dev_dbg(&aic26->spi->dev, "bad master\n"); return -EINVAL;
  

• }
• /* interface format */
• switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {

• case SND_SOC_DAIFMT_I2S: aic26->datfm = AIC26_DATFM_I2S; break;
  

• case SND_SOC_DAIFMT_DSP_A: aic26->datfm = AIC26_DATFM_DSP; break;
  

• case SND_SOC_DAIFMT_RIGHT_J: aic26->datfm = AIC26_DATFM_RIGHTJ; break;
  

• case SND_SOC_DAIFMT_LEFT_J: aic26->datfm = AIC26_DATFM_LEFTJ; break;
  

• default: dev_dbg(&aic26->spi->dev, "bad format\n"); return -EINVAL;
  

• }
• return 0;

+}

+/* ---------------------------------------------------------------------

• • Digital Audio Interface Definition
• */

+struct snd_soc_codec_dai aic26_dai = {

• .name = "tlv320aic26",
• .playback = {

• .stream_name = "Playback",
  

• .channels_min = 2,
  

• .channels_max = 2,
  

• .rates = AIC26_RATES,
  

• .formats = AIC26_FORMATS,
  

• },
• .capture = {

• .stream_name = "Capture",
  

• .channels_min = 2,
  

• .channels_max = 2,
  

• .rates = AIC26_RATES,
  

• .formats = AIC26_FORMATS,
  

• },
• .ops = {

• .hw_params = aic26_hw_params,
  

• },
• .dai_ops = {

• .digital_mute = aic26_mute,
  

• .set_sysclk = aic26_set_sysclk,
  

• .set_fmt = aic26_set_fmt,
  

• },

+}; +EXPORT_SYMBOL_GPL(aic26_dai);

+/* ---------------------------------------------------------------------

• • ALSA controls
• */

+static const char *aic26_capture_src_text[] = {"Mic", "Aux"}; +static const struct soc_enum aic26_capture_src_enum =

• SOC_ENUM_SINGLE(AIC26_REG_AUDIO_CTRL1, 12,2, aic26_capture_src_text);

+static const struct snd_kcontrol_new aic26_snd_controls[] = {

• /* Output */
• SOC_DOUBLE("PCM Playback Volume", AIC26_REG_DAC_GAIN, 8, 0, 0x7f, 1),
• SOC_DOUBLE("PCM Playback Switch", AIC26_REG_DAC_GAIN, 15, 7, 1, 1),
• SOC_SINGLE("PCM Capture Volume", AIC26_REG_ADC_GAIN, 8, 0x7f, 0),
• SOC_SINGLE("PCM Capture Mute", AIC26_REG_ADC_GAIN, 15, 1, 1),
• SOC_ENUM("Capture Source", aic26_capture_src_enum),

+};

+/* ---------------------------------------------------------------------

• • SoC CODEC portion of driver: probe and release routines
• */

+static int aic26_probe(struct platform_device *pdev) +{

• struct snd_soc_device *socdev = platform_get_drvdata(pdev);
• struct snd_soc_codec *codec;
• struct snd_kcontrol *kcontrol;
• struct aic26 *aic26;
• int i, ret, err;
• dev_info(&pdev->dev, "Probing AIC26 SoC CODEC driver\n");
• dev_dbg(&pdev->dev, "socdev=%p\n", socdev);
• dev_dbg(&pdev->dev, "codec_data=%p\n", socdev->codec_data);
• /* Fetch the relevant aic26 private data here (it's already been

• * stored in the .codec pointer) */
  

• aic26 = socdev->codec_data;
• if (aic26 == NULL) {

• dev_err(&pdev->dev, "aic26: missing codec pointer\n");
  

• return -ENODEV;
  

• }
• codec = &aic26->codec;
• socdev->codec = codec;
• dev_dbg(&pdev->dev, "Registering PCMs, dev=%p, socdev->dev=%p\n",

• &pdev->dev, socdev->dev);
  

• /* register pcms */
• ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
• if (ret < 0) {

• dev_err(&pdev->dev, "aic26: failed to create pcms\n");
  

• return -ENODEV;
  

• }
• /* register controls */
• dev_dbg(&pdev->dev, "Registering controls\n");
• for (i = 0; i < ARRAY_SIZE(aic26_snd_controls); i++) {

• kcontrol = snd_soc_cnew(&aic26_snd_controls[i], codec, NULL);
  

• err = snd_ctl_add(codec->card, kcontrol);
  

• WARN_ON(err < 0);
  

• }
• /* CODEC is setup, we can register the card now */
• dev_dbg(&pdev->dev, "Registering card\n");
• ret = snd_soc_register_card(socdev);
• if (ret < 0) {

• dev_err(&pdev->dev, "aic26: failed to register card\n");
  

• goto card_err;
  

• }
• return 0;
• card_err:
• snd_soc_free_pcms(socdev);
• return ret;

+}

+static int aic26_remove(struct platform_device *pdev) +{

• struct snd_soc_device *socdev = platform_get_drvdata(pdev);
• snd_soc_free_pcms(socdev);
• return 0;

+}

+struct snd_soc_codec_device aic26_soc_codec_dev = {

• .probe = aic26_probe,
• .remove = aic26_remove,

+};

+/* ---------------------------------------------------------------------

• • SPI device portion of driver: sysfs files for debugging
• */

+static ssize_t aic26_regs_show(struct device *dev,

• 		struct device_attribute *attr, char *buf)
  

+{

• struct aic26 *aic26 = dev_get_drvdata(dev);
• char *idx = buf;
• int cache_flag, addr, page, i, reg;
• cache_flag = (strcmp(attr->attr.name, "regs_cache") == 0);
• for (page = 0; page < 3; page++) {

• for (i = 0; i < 0x20; i++) {
  

• 	addr = AIC26_PAGE_ADDR(page, i);
  

• 	if (i % 8 == 0)
  

• 		idx += sprintf(idx, "%i:%.2i:", page,i);
  

• 	if (cache_flag)
  

• 		reg = aic26_reg_read_cache(&aic26->codec, addr);
  

• 	else
  

• 		reg = aic26_reg_read(&aic26->codec, addr);
  

• 	idx += sprintf(idx, " %.4x", reg);
  

• 	if (i % 8 == 7)
  

• 		idx += sprintf(idx, "\n");
  

• }
  

• }
• return idx - buf;

+}

The soc_core already has a codec reg dump sysfs file, so we don't need this.

+static ssize_t aic26_keyclick_show(struct device *dev,

• 		   struct device_attribute *attr, char *buf)
  

+{

• struct aic26 *aic26 = dev_get_drvdata(dev);
• int val, amp, freq, len;
• val = aic26_reg_read_cache(&aic26->codec, AIC26_REG_AUDIO_CTRL2);
• amp = (val >> 12) & 0x7;
• freq = (125 << ((val >> 8) & 0x7)) >> 1;
• len = 2 * (1 +((val >> 8) & 0xf));
• return sprintf(buf, "amp=%x freq=%iHz len=%iclks\n", amp, freq, len);

+}

+/* Any write to the keyclick attribute will trigger the keyclick */ +static ssize_t aic26_keyclick_set(struct device *dev,

• 		  struct device_attribute *attr,
  

• 		  const char *buf, size_t count)
  

+{

• struct aic26 *aic26 = dev_get_drvdata(dev);
• int val;
• val = aic26_reg_read_cache(&aic26->codec, AIC26_REG_AUDIO_CTRL2);
• val |= 0x8000;
• aic26_reg_write(&aic26->codec, AIC26_REG_AUDIO_CTRL2, val);
• return count;

+}

+DEVICE_ATTR(regs, 0644, aic26_regs_show, NULL); +DEVICE_ATTR(regs_cache, 0644, aic26_regs_show, NULL); +DEVICE_ATTR(keyclick, 0644, aic26_keyclick_show, aic26_keyclick_set);

+/* ---------------------------------------------------------------------

• • SPI device portion of driver: probe and release routines and SPI

• • 		 driver registration.
    

• */

+static int aic26_spi_probe(struct spi_device *spi) +{

• struct aic26 *aic26;
• int rc, i, reg;
• dev_dbg(&spi->dev, "probing tlv320aic26 spi device\n");
• /* Allocate driver data */
• aic26 = kzalloc(sizeof *aic26, GFP_KERNEL);
• if (!aic26)

• return -ENOMEM;
  

• /* Initialize the driver data */
• aic26->spi = spi;
• dev_set_drvdata(&spi->dev, aic26);
• /* Setup what we can in the codec structure so that the register

• * access functions will work as expected.  More will be filled
  

• * out when it is probed by the SoC CODEC part of this driver */
  

• aic26->codec.private_data = aic26;
• aic26->codec.name = "aic26";
• aic26->codec.owner = THIS_MODULE;
• aic26->codec.dai = &aic26_dai;
• aic26->codec.num_dai = 1;
• aic26->codec.read = aic26_reg_read;
• aic26->codec.write = aic26_reg_write;
• aic26->master = 1;
• mutex_init(&aic26->codec.mutex);
• INIT_LIST_HEAD(&aic26->codec.dapm_widgets);
• INIT_LIST_HEAD(&aic26->codec.dapm_paths);
• aic26->codec.reg_cache_size = sizeof(aic26->reg_cache);
• aic26->codec.reg_cache = aic26->reg_cache;
• /* Reset the codec to power on defaults */
• aic26_reg_write(&aic26->codec, AIC26_REG_RESET, 0xBB00);
• /* Power up CODEC */
• aic26_reg_write(&aic26->codec, AIC26_REG_POWER_CTRL, 0);
• /* Audio Control 3 (master mode, fsref rate) */
• reg = aic26_reg_read(&aic26->codec, AIC26_REG_AUDIO_CTRL3);
• reg &= ~0xf800;
• reg |= 0x0800; /* set master mode */
• aic26_reg_write(&aic26->codec, AIC26_REG_AUDIO_CTRL3, reg);
• /* Fill page 2 register cache */
• for (i = 0; i < ARRAY_SIZE(aic26->reg_cache); i++)

• aic26_reg_read(&aic26->codec, AIC26_PAGE_ADDR(2, i));
  

• /* Register the sysfs files for debugging */
• /* Create SysFS files */
• rc = device_create_file(&spi->dev, &dev_attr_regs);
• rc |= device_create_file(&spi->dev, &dev_attr_regs_cache);
• rc |= device_create_file(&spi->dev, &dev_attr_keyclick);
• if (rc)

• dev_info(&spi->dev, "error creating sysfs files\n");
  

• /* Tell the of_soc helper about this codec */
• of_snd_soc_register_codec(&aic26_soc_codec_dev, aic26, &aic26_dai,

• 		  spi->dev.archdata.of_node);
  

• dev_dbg(&spi->dev, "SPI device initialized\n");
• return 0;

+}

+static int aic26_spi_remove(struct spi_device *spi) +{

• struct aic26 *aic26 = dev_get_drvdata(&spi->dev);
• kfree(aic26);
• return 0;

+}

+static struct spi_driver aic26_spi = {

• .driver = {

• .name = "tlv320aic26",
  

• .owner = THIS_MODULE,
  

• },
• .probe = aic26_spi_probe,
• .remove = aic26_spi_remove,

+};

+static int __init aic26_init(void) +{

• return spi_register_driver(&aic26_spi);

+} +module_init(aic26_init);

+static void __exit aic26_exit(void) +{

• spi_unregister_driver(&aic26_spi);

+} +module_exit(aic26_exit);

---

Alsa-devel mailing list Alsa-devel@alsa-project.org http://mailman.alsa-project.org/mailman/listinfo/alsa-devel

Privacy & Confidentiality Notice ------------------------------------------------- This message and any attachments contain privileged and confidential information that is intended solely for the person(s) to whom it is addressed. If you are not an intended recipient you must not: read; copy; distribute; discuss; take any action in or make any reliance upon the contents of this message; nor open or read any attachment. If you have received this message in error, please notify us as soon as possible on the following telephone number and destroy this message including any attachments. Thank you. ------------------------------------------------- Wolfson Microelectronics plc Tel: +44 (0)131 272 7000 Fax: +44 (0)131 272 7001 Web: www.wolfsonmicro.com

Registered in Scotland

Company number SC089839

Registered office:

Westfield House, 26 Westfield Road, Edinburgh, EH11 2QB, UK