ALSA: ASoC: Add Texas Instruments TLV320AIC26 codec driver
authorGrant Likely <grant.likely@secretlab.ca>
Tue, 29 Jul 2008 10:42:31 +0000 (11:42 +0100)
committerJaroslav Kysela <perex@perex.cz>
Tue, 29 Jul 2008 19:32:24 +0000 (21:32 +0200)
ASoC Codec driver for the TLV320AIC26 device.  As it stands, this driver
doesn't support all the modes and clocking options of the AIC16, but it
is a start.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
sound/soc/codecs/Kconfig
sound/soc/codecs/Makefile
sound/soc/codecs/tlv320aic26.c [new file with mode: 0644]
sound/soc/codecs/tlv320aic26.h [new file with mode: 0644]

index 1db04a28a53d46c7732401a2375ea904db158af6..9e09fa5f2d45f1f278684b529c8b1a61cf6f45e3 100644 (file)
@@ -47,6 +47,10 @@ config SND_SOC_CS4270_VD33_ERRATA
        bool
        depends on SND_SOC_CS4270
 
+config SND_SOC_TLV320AIC26
+       tristate "TI TLV320AIC26 Codec support"
+       depends on SND_SOC && SPI
+
 config SND_SOC_TLV320AIC3X
        tristate
        depends on I2C
index d7b97abcf7291cea11e2ea29a3c687551f241b4f..dc0357e20fea4918c4c948cbdf571cb45559e937 100644 (file)
@@ -9,6 +9,7 @@ snd-soc-wm8990-objs := wm8990.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-$(CONFIG_SND_SOC_AC97_CODEC)       += snd-soc-ac97.o
@@ -22,4 +23,5 @@ obj-$(CONFIG_SND_SOC_WM8990)  += snd-soc-wm8990.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 (file)
index 0000000..4621fda
--- /dev/null
@@ -0,0 +1,519 @@
+/*
+ * 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,
+};
+
+/* ---------------------------------------------------------------------
+ * 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;
+}
+
+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);
diff --git a/sound/soc/codecs/tlv320aic26.h b/sound/soc/codecs/tlv320aic26.h
new file mode 100644 (file)
index 0000000..62b1f22
--- /dev/null
@@ -0,0 +1,93 @@
+/*
+ * Texas Instruments TLV320AIC26 low power audio CODEC
+ * register definitions
+ *
+ * Copyright (C) 2008 Secret Lab Technologies Ltd.
+ */
+
+#ifndef _TLV320AIC16_H_
+#define _TLV320AIC16_H_
+
+/* 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)
+
+/* 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)
+
+/* 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,
+};
+
+#endif /* _TLV320AIC16_H_ */