[alsa-devel] [PATCH 1/2] ALSA: ASoc: TLV320AIC3X: ad SPI and clock on GPIO2 or BCLK
Prchal Jiří
jiri.prchal at aksignal.cz
Thu Mar 24 11:20:45 CET 2011
Hi,
this patch ads SPI communication for codecs TLV320AIC3X and clock input on GPIO2 or BCLK.
Tested on TLV320AIC3106 and AT91SAM9260.
TODO: Set the model in SPI probe the right way. I don't know how.
This codec communicates on SPI in 1st byte: 7 MSB is register address, 1 LSB is read/write, 2nd byte data. For this
reason there is new functions in soc-cache.c snd_soc_7_8_*.
Kernel version: 2.6.38
Signed-off-by: Jiri Prchal <jiri.prchal at aksignal.cz>
---
diff -uprN -X linux-2.6.38-vanilla/Documentation/dontdiff linux-2.6.38-vanilla/sound/soc/codecs/Kconfig
/home/prchal/arm/fw-cdu/linux/linux-2.6.38/sound/soc/codecs/Kconfig
--- linux-2.6.38-vanilla/sound/soc/codecs/Kconfig 2011-03-15 02:20:32.000000000 +0100
+++ /home/prchal/arm/fw-cdu/linux/linux-2.6.38/sound/soc/codecs/Kconfig 2011-03-17 08:37:14.997500191 +0100
@@ -37,7 +37,7 @@ config SND_SOC_ALL_CODECS
select SND_SOC_STAC9766 if SND_SOC_AC97_BUS
select SND_SOC_TLV320AIC23 if I2C
select SND_SOC_TLV320AIC26 if SPI_MASTER
- select SND_SOC_TLV320AIC3X if I2C
+ select SND_SOC_TLV320AIC3X if SND_SOC_I2C_AND_SPI
select SND_SOC_TPA6130A2 if I2C
select SND_SOC_TLV320DAC33 if I2C
select SND_SOC_TWL4030 if TWL4030_CORE
@@ -118,7 +118,7 @@ config SND_SOC_AD1980
config SND_SOC_AD73311
tristate
-
+
config SND_SOC_ADS117X
tristate
diff -uprN -X linux-2.6.38-vanilla/Documentation/dontdiff linux-2.6.38-vanilla/sound/soc/codecs/tlv320aic3x.c
/home/prchal/arm/fw-cdu/linux/linux-2.6.38/sound/soc/codecs/tlv320aic3x.c
--- linux-2.6.38-vanilla/sound/soc/codecs/tlv320aic3x.c 2011-03-15 02:20:32.000000000 +0100
+++ /home/prchal/arm/fw-cdu/linux/linux-2.6.38/sound/soc/codecs/tlv320aic3x.c 2011-03-24 09:34:58.769370117 +0100
@@ -2,7 +2,9 @@
* ALSA SoC TLV320AIC3X codec driver
*
* Author: Vladimir Barinov, <vbarinov at embeddedalley.com>
+ * Jiri Prchal, <jiri.prchal at aksignal.cz
* Copyright: (C) 2007 MontaVista Software, Inc., <source at mvista.com>
+ * (C) 2011 AK signal Brno
*
* Based on sound/soc/codecs/wm8753.c by Liam Girdwood
*
@@ -42,6 +44,7 @@
#include <linux/regulator/consumer.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
+#include <linux/spi/spi.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
@@ -984,6 +987,13 @@ static int aic3x_set_dai_sysclk(struct s
{
struct snd_soc_codec *codec = codec_dai->codec;
struct aic3x_priv *aic3x = snd_soc_codec_get_drvdata(codec);
+ u8 data;
+
+ /* set external clock on GPIO2 or BCLK */
+ data = snd_soc_read(codec, AIC3X_CLKGEN_CTRL_REG);
+ data &= 0x0f;
+ data |= ((clk_id << PLLCLK_IN_SHIFT) | (clk_id << CLKDIV_IN_SHIFT));
+ snd_soc_write(codec, AIC3X_CLKGEN_CTRL_REG, data);
aic3x->sysclk = freq;
return 0;
@@ -1371,9 +1381,12 @@ static int aic3x_probe(struct snd_soc_co
aic3x->codec = codec;
codec->dapm.idle_bias_off = 1;
- ret = snd_soc_codec_set_cache_io(codec, 8, 8, aic3x->control_type);
+ if (aic3x->control_type == SND_SOC_I2C)
+ ret = snd_soc_codec_set_cache_io(codec, 8, 8, aic3x->control_type);
+ else
+ ret = snd_soc_codec_set_cache_io(codec, 7, 8, aic3x->control_type);
if (ret != 0) {
- dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
+ dev_err(codec->dev, "failed to set cache I/O: %d\n", ret);
return ret;
}
@@ -1472,6 +1485,54 @@ static struct snd_soc_codec_driver soc_c
.resume = aic3x_resume,
};
+#if defined(CONFIG_SPI_MASTER)
+static int aic3x_spi_probe(struct spi_device *spi)
+{
+ struct aic3x_pdata *pdata = spi->dev.platform_data;
+ struct aic3x_priv *aic3x;
+ int ret;
+
+ aic3x = kzalloc(sizeof(struct aic3x_priv), GFP_KERNEL);
+ if (aic3x == NULL) {
+ dev_err(&spi->dev, "failed to create private data\n");
+ return -ENOMEM;
+ }
+
+ aic3x->control_type = SND_SOC_SPI;
+ spi_set_drvdata(spi, aic3x);
+
+ if (pdata) {
+ aic3x->gpio_reset = pdata->gpio_reset;
+ aic3x->setup = pdata->setup;
+ } else {
+ aic3x->gpio_reset = -1;
+ }
+
+ aic3x->model = AIC3X_MODEL_3X;
+
+ ret = snd_soc_register_codec(&spi->dev, &soc_codec_dev_aic3x, &aic3x_dai, 1);
+ if (ret < 0)
+ kfree(aic3x);
+ return ret;
+}
+
+static int __devexit aic3x_spi_remove(struct spi_device *spi)
+{
+ snd_soc_unregister_codec(&spi->dev);
+ kfree(spi_get_drvdata(spi));
+ return 0;
+}
+
+static struct spi_driver aic3x_spi_driver = {
+ .driver = {
+ .name = "tlv320aic3x-codec",
+ .owner = THIS_MODULE,
+ },
+ .probe = aic3x_spi_probe,
+ .remove = __devexit_p(aic3x_spi_remove),
+};
+#endif /* CONFIG_SPI_MASTER */
+
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
/*
* AIC3X 2 wire address can be up to 4 devices with device addresses
@@ -1557,6 +1618,13 @@ static int __init aic3x_modinit(void)
ret);
}
#endif
+#if defined(CONFIG_SPI_MASTER)
+ ret = spi_register_driver(&aic3x_spi_driver);
+ if (ret != 0) {
+ printk(KERN_ERR "Failed to register AIC3X SPI driver: %d\n",
+ ret);
+ }
+#endif
return ret;
}
module_init(aic3x_modinit);
@@ -1566,6 +1634,9 @@ static void __exit aic3x_exit(void)
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
i2c_del_driver(&aic3x_i2c_driver);
#endif
+#if defined(CONFIG_SPI_MASTER)
+ spi_unregister_driver(&aic3x_spi_driver);
+#endif
}
module_exit(aic3x_exit);
diff -uprN -X linux-2.6.38-vanilla/Documentation/dontdiff linux-2.6.38-vanilla/sound/soc/codecs/tlv320aic3x.h
/home/prchal/arm/fw-cdu/linux/linux-2.6.38/sound/soc/codecs/tlv320aic3x.h
--- linux-2.6.38-vanilla/sound/soc/codecs/tlv320aic3x.h 2011-03-15 02:20:32.000000000 +0100
+++ /home/prchal/arm/fw-cdu/linux/linux-2.6.38/sound/soc/codecs/tlv320aic3x.h 2011-03-22 13:37:54.751566089 +0100
@@ -178,6 +178,13 @@
#define PLL_CLKIN_SHIFT 4
#define MCLK_SOURCE 0x0
#define PLL_CLKDIV_SHIFT 0
+#define PLLCLK_IN_SHIFT 4
+#define CLKDIV_IN_SHIFT 6
+/* clock in source */
+#define CLKIN_MCLK 0
+#define CLKIN_GPIO2 1
+#define CLKIN_BCLK 2
+
/* Software reset register bits */
#define SOFT_RESET 0x80
diff -uprN -X linux-2.6.38-vanilla/Documentation/dontdiff linux-2.6.38-vanilla/sound/soc/soc-cache.c
/home/prchal/arm/fw-cdu/linux/linux-2.6.38/sound/soc/soc-cache.c
--- linux-2.6.38-vanilla/sound/soc/soc-cache.c 2011-03-15 02:20:32.000000000 +0100
+++ /home/prchal/arm/fw-cdu/linux/linux-2.6.38/sound/soc/soc-cache.c 2011-03-24 09:23:00.984373772 +0100
@@ -99,6 +99,58 @@ static int snd_soc_4_12_spi_write(void *
#define snd_soc_4_12_spi_write NULL
#endif
+/* special functions for codecs with 7 bit register address and LSB read/write (like TLV320AIC3X) */
+static unsigned int snd_soc_7_8_read(struct snd_soc_codec *codec,
+ unsigned int reg)
+{
+ int ret;
+ unsigned int val;
+
+ if (reg >= codec->driver->reg_cache_size ||
+ snd_soc_codec_volatile_register(codec, reg)) {
+ if (codec->cache_only)
+ return -1;
+
+ BUG_ON(!codec->hw_read);
+ return codec->hw_read(codec, ((reg << 1) | 1));
+ }
+
+ ret = snd_soc_cache_read(codec, reg, &val);
+ if (ret < 0)
+ return -1;
+ return val;
+}
+
+static int snd_soc_7_8_write(struct snd_soc_codec *codec, unsigned int reg,
+ unsigned int value)
+{
+ u8 data[2];
+ int ret;
+
+ data[0] = (reg << 1);
+ data[1] = value;
+
+ if (!snd_soc_codec_volatile_register(codec, reg) &&
+ reg < codec->driver->reg_cache_size) {
+ ret = snd_soc_cache_write(codec, reg, value);
+ if (ret < 0)
+ return -1;
+ }
+
+ if (codec->cache_only) {
+ codec->cache_sync = 1;
+ return 0;
+ }
+
+ ret = codec->hw_write(codec->control_data, data, 2);
+ if (ret == 2)
+ return 0;
+ if (ret < 0)
+ return ret;
+ else
+ return -EIO;
+}
+
static unsigned int snd_soc_7_9_read(struct snd_soc_codec *codec,
unsigned int reg)
{
@@ -661,6 +713,11 @@ static struct {
.spi_write = snd_soc_4_12_spi_write,
},
{
+ .addr_bits = 7, .data_bits = 8,
+ .write = snd_soc_7_8_write, .read = snd_soc_7_8_read,
+ .spi_write = snd_soc_8_8_spi_write,
+ },
+ {
.addr_bits = 7, .data_bits = 9,
.write = snd_soc_7_9_write, .read = snd_soc_7_9_read,
.spi_write = snd_soc_7_9_spi_write,
--
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