1 files changed, 520 insertions, 0 deletions

diff --git a/sound/soc/codecs/tlv320aic26.c b/sound/soc/codecs/tlv320aic26.c
new file mode 100644
index 000000000000..bed8a9e63ddc
--- /dev/null
+++ b/sound/soc/codecs/tlv320aic26.c
@@ -0,0 +1,520 @@
+/*
+ * 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-simple.h>
+#include <sound/initval.h>
+
+#include "tlv320aic26.h"
+
+MODULE_DESCRIPTION("ASoC TLV320AIC26 codec driver");
+MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
+MODULE_LICENSE("GPL");
+
+/* AIC26 driver private data */
+struct aic26 {
+        struct spi_device *spi;
+        struct snd_soc_codec codec;
+        u16 reg_cache[AIC26_NUM_REGS];  /* 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 >= 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 */
+        cache[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 >= AIC26_NUM_REGS) {
+                WARN_ON_ONCE(1);
+                return 0;
+        }
+
+        return cache[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 >= 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 */
+        cache[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;
+        }
+
+        /* 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;
+        }
+
+        /* 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);
+
+        /* 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_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_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_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
+ */
+#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)
+
+struct snd_soc_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_SINGLE("Keyclick activate", AIC26_REG_AUDIO_CTRL2, 15, 0x1, 0),
+        SOC_SINGLE("Keyclick amplitude", AIC26_REG_AUDIO_CTRL2, 12, 0x7, 0),
+        SOC_SINGLE("Keyclick frequency", AIC26_REG_AUDIO_CTRL2, 8, 0x7, 0),
+        SOC_SINGLE("Keyclick period", AIC26_REG_AUDIO_CTRL2, 4, 0xf, 0),
+        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,
+};
+EXPORT_SYMBOL_GPL(aic26_soc_codec_dev);
+
+/* ---------------------------------------------------------------------
+ * SPI device portion of driver: sysfs files for debugging
+ */
+
+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 >> 4) & 0xf));
+
+        return sprintf(buf, "amp=%x freq=%iHz len=%iclks\n", amp, freq, len);
+}
+
+/* Any write to the keyclick attribute will trigger the keyclick event */
+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;
+}
+
+static 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 = AIC26_NUM_REGS;
+        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 register cache */
+        for (i = 0; i < ARRAY_SIZE(aic26->reg_cache); i++)
+                aic26_reg_read(&aic26->codec, i);
+
+        /* Register the sysfs files for debugging */
+        /* Create SysFS files */
+        rc = device_create_file(&spi->dev, &dev_attr_keyclick);
+        if (rc)
+                dev_info(&spi->dev, "error creating sysfs files\n");
+
+#if defined(CONFIG_SND_SOC_OF_SIMPLE)
+        /* 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);
+#endif
+
+        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);