summaryrefslogtreecommitdiffstats
path: root/sound/soc/atmel/sam9g20_wm8731.c
diff options
context:
space:
mode:
Diffstat (limited to 'sound/soc/atmel/sam9g20_wm8731.c')
-rw-r--r--sound/soc/atmel/sam9g20_wm8731.c124
1 files changed, 111 insertions, 13 deletions
diff --git a/sound/soc/atmel/sam9g20_wm8731.c b/sound/soc/atmel/sam9g20_wm8731.c
index 6ea04be..173a239 100644
--- a/sound/soc/atmel/sam9g20_wm8731.c
+++ b/sound/soc/atmel/sam9g20_wm8731.c
@@ -36,6 +36,7 @@
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
+#include <linux/i2c.h>
#include <linux/atmel-ssc.h>
@@ -45,6 +46,7 @@
#include <sound/soc.h>
#include <sound/soc-dapm.h>
+#include <asm/mach-types.h>
#include <mach/hardware.h>
#include <mach/gpio.h>
@@ -52,6 +54,9 @@
#include "atmel-pcm.h"
#include "atmel_ssc_dai.h"
+#define MCLK_RATE 12000000
+
+static struct clk *mclk;
static int at91sam9g20ek_startup(struct snd_pcm_substream *substream)
{
@@ -59,11 +64,12 @@ static int at91sam9g20ek_startup(struct snd_pcm_substream *substream)
struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
int ret;
- /* codec system clock is supplied by PCK0, set to 12MHz */
ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK,
- 12000000, SND_SOC_CLOCK_IN);
- if (ret < 0)
+ MCLK_RATE, SND_SOC_CLOCK_IN);
+ if (ret < 0) {
+ clk_disable(mclk);
return ret;
+ }
return 0;
}
@@ -189,6 +195,31 @@ static struct snd_soc_ops at91sam9g20ek_ops = {
.shutdown = at91sam9g20ek_shutdown,
};
+static int at91sam9g20ek_set_bias_level(struct snd_soc_card *card,
+ enum snd_soc_bias_level level)
+{
+ static int mclk_on;
+ int ret = 0;
+
+ switch (level) {
+ case SND_SOC_BIAS_ON:
+ case SND_SOC_BIAS_PREPARE:
+ if (!mclk_on)
+ ret = clk_enable(mclk);
+ if (ret == 0)
+ mclk_on = 1;
+ break;
+
+ case SND_SOC_BIAS_OFF:
+ case SND_SOC_BIAS_STANDBY:
+ if (mclk_on)
+ clk_disable(mclk);
+ mclk_on = 0;
+ break;
+ }
+
+ return ret;
+}
static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets[] = {
SND_SOC_DAPM_MIC("Int Mic", NULL),
@@ -243,21 +274,48 @@ static struct snd_soc_dai_link at91sam9g20ek_dai = {
};
static struct snd_soc_card snd_soc_at91sam9g20ek = {
- .name = "WM8731",
+ .name = "AT91SAMG20-EK",
.platform = &atmel_soc_platform,
.dai_link = &at91sam9g20ek_dai,
.num_links = 1,
+ .set_bias_level = at91sam9g20ek_set_bias_level,
};
-static struct wm8731_setup_data at91sam9g20ek_wm8731_setup = {
- .i2c_bus = 0,
- .i2c_address = 0x1b,
-};
+/*
+ * FIXME: This is a temporary bodge to avoid cross-tree merge issues.
+ * New drivers should register the wm8731 I2C device in the machine
+ * setup code (under arch/arm for ARM systems).
+ */
+static int wm8731_i2c_register(void)
+{
+ struct i2c_board_info info;
+ struct i2c_adapter *adapter;
+ struct i2c_client *client;
+
+ memset(&info, 0, sizeof(struct i2c_board_info));
+ info.addr = 0x1b;
+ strlcpy(info.type, "wm8731", I2C_NAME_SIZE);
+
+ adapter = i2c_get_adapter(0);
+ if (!adapter) {
+ printk(KERN_ERR "can't get i2c adapter 0\n");
+ return -ENODEV;
+ }
+
+ client = i2c_new_device(adapter, &info);
+ i2c_put_adapter(adapter);
+ if (!client) {
+ printk(KERN_ERR "can't add i2c device at 0x%x\n",
+ (unsigned int)info.addr);
+ return -ENODEV;
+ }
+
+ return 0;
+}
static struct snd_soc_device at91sam9g20ek_snd_devdata = {
.card = &snd_soc_at91sam9g20ek,
.codec_dev = &soc_codec_dev_wm8731,
- .codec_data = &at91sam9g20ek_wm8731_setup,
};
static struct platform_device *at91sam9g20ek_snd_device;
@@ -266,23 +324,56 @@ static int __init at91sam9g20ek_init(void)
{
struct atmel_ssc_info *ssc_p = at91sam9g20ek_dai.cpu_dai->private_data;
struct ssc_device *ssc = NULL;
+ struct clk *pllb;
int ret;
+ if (!machine_is_at91sam9g20ek())
+ return -ENODEV;
+
+ /*
+ * Codec MCLK is supplied by PCK0 - set it up.
+ */
+ mclk = clk_get(NULL, "pck0");
+ if (IS_ERR(mclk)) {
+ printk(KERN_ERR "ASoC: Failed to get MCLK\n");
+ ret = PTR_ERR(mclk);
+ goto err;
+ }
+
+ pllb = clk_get(NULL, "pllb");
+ if (IS_ERR(mclk)) {
+ printk(KERN_ERR "ASoC: Failed to get PLLB\n");
+ ret = PTR_ERR(mclk);
+ goto err_mclk;
+ }
+ ret = clk_set_parent(mclk, pllb);
+ clk_put(pllb);
+ if (ret != 0) {
+ printk(KERN_ERR "ASoC: Failed to set MCLK parent\n");
+ goto err_mclk;
+ }
+
+ clk_set_rate(mclk, MCLK_RATE);
+
/*
* Request SSC device
*/
ssc = ssc_request(0);
if (IS_ERR(ssc)) {
+ printk(KERN_ERR "ASoC: Failed to request SSC 0\n");
ret = PTR_ERR(ssc);
ssc = NULL;
goto err_ssc;
}
ssc_p->ssc = ssc;
+ ret = wm8731_i2c_register();
+ if (ret != 0)
+ goto err_ssc;
+
at91sam9g20ek_snd_device = platform_device_alloc("soc-audio", -1);
if (!at91sam9g20ek_snd_device) {
- printk(KERN_DEBUG
- "platform device allocation failed\n");
+ printk(KERN_ERR "ASoC: Platform device allocation failed\n");
ret = -ENOMEM;
}
@@ -292,14 +383,19 @@ static int __init at91sam9g20ek_init(void)
ret = platform_device_add(at91sam9g20ek_snd_device);
if (ret) {
- printk(KERN_DEBUG
- "platform device allocation failed\n");
+ printk(KERN_ERR "ASoC: Platform device allocation failed\n");
platform_device_put(at91sam9g20ek_snd_device);
}
return ret;
err_ssc:
+ ssc_free(ssc);
+ ssc_p->ssc = NULL;
+err_mclk:
+ clk_put(mclk);
+ mclk = NULL;
+err:
return ret;
}
@@ -317,6 +413,8 @@ static void __exit at91sam9g20ek_exit(void)
platform_device_unregister(at91sam9g20ek_snd_device);
at91sam9g20ek_snd_device = NULL;
+ clk_put(mclk);
+ mclk = NULL;
}
module_init(at91sam9g20ek_init);
OpenPOWER on IntegriCloud