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Diffstat (limited to 'sound/soc/codecs/adau1701.c')
-rw-r--r--sound/soc/codecs/adau1701.c105
1 files changed, 98 insertions, 7 deletions
diff --git a/sound/soc/codecs/adau1701.c b/sound/soc/codecs/adau1701.c
index 997fc3b881f..770d90ee5f9 100644
--- a/sound/soc/codecs/adau1701.c
+++ b/sound/soc/codecs/adau1701.c
@@ -87,11 +87,16 @@
#define ADAU1701_OSCIPOW_OPD 0x04
#define ADAU1701_DACSET_DACINIT 1
+#define ADAU1707_CLKDIV_UNSET (-1UL)
+
#define ADAU1701_FIRMWARE "adau1701.bin"
struct adau1701 {
int gpio_nreset;
+ int gpio_pll_mode[2];
unsigned int dai_fmt;
+ unsigned int pll_clkdiv;
+ unsigned int sysclk;
};
static const struct snd_kcontrol_new adau1701_controls[] = {
@@ -184,12 +189,38 @@ static unsigned int adau1701_read(struct snd_soc_codec *codec, unsigned int reg)
return value;
}
-static int adau1701_reset(struct snd_soc_codec *codec)
+static int adau1701_reset(struct snd_soc_codec *codec, unsigned int clkdiv)
{
struct adau1701 *adau1701 = snd_soc_codec_get_drvdata(codec);
struct i2c_client *client = to_i2c_client(codec->dev);
int ret;
+ if (clkdiv != ADAU1707_CLKDIV_UNSET &&
+ gpio_is_valid(adau1701->gpio_pll_mode[0]) &&
+ gpio_is_valid(adau1701->gpio_pll_mode[1])) {
+ switch (clkdiv) {
+ case 64:
+ gpio_set_value(adau1701->gpio_pll_mode[0], 0);
+ gpio_set_value(adau1701->gpio_pll_mode[1], 0);
+ break;
+ case 256:
+ gpio_set_value(adau1701->gpio_pll_mode[0], 0);
+ gpio_set_value(adau1701->gpio_pll_mode[1], 1);
+ break;
+ case 384:
+ gpio_set_value(adau1701->gpio_pll_mode[0], 1);
+ gpio_set_value(adau1701->gpio_pll_mode[1], 0);
+ break;
+ case 0: /* fallback */
+ case 512:
+ gpio_set_value(adau1701->gpio_pll_mode[0], 1);
+ gpio_set_value(adau1701->gpio_pll_mode[1], 1);
+ break;
+ }
+ }
+
+ adau1701->pll_clkdiv = clkdiv;
+
if (gpio_is_valid(adau1701->gpio_nreset)) {
gpio_set_value(adau1701->gpio_nreset, 0);
/* minimum reset time is 20ns */
@@ -199,10 +230,16 @@ static int adau1701_reset(struct snd_soc_codec *codec)
mdelay(85);
}
- ret = process_sigma_firmware(client, ADAU1701_FIRMWARE);
- if (ret) {
- dev_warn(codec->dev, "Failed to load firmware\n");
- return ret;
+ /*
+ * Postpone the firmware download to a point in time when we
+ * know the correct PLL setup
+ */
+ if (clkdiv != ADAU1707_CLKDIV_UNSET) {
+ ret = process_sigma_firmware(client, ADAU1701_FIRMWARE);
+ if (ret) {
+ dev_warn(codec->dev, "Failed to load firmware\n");
+ return ret;
+ }
}
snd_soc_write(codec, ADAU1701_DACSET, ADAU1701_DACSET_DACINIT);
@@ -285,8 +322,22 @@ static int adau1701_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec = dai->codec;
+ struct adau1701 *adau1701 = snd_soc_codec_get_drvdata(codec);
+ unsigned int clkdiv = adau1701->sysclk / params_rate(params);
snd_pcm_format_t format;
unsigned int val;
+ int ret;
+
+ /*
+ * If the mclk/lrclk ratio changes, the chip needs updated PLL
+ * mode GPIO settings, and a full reset cycle, including a new
+ * firmware upload.
+ */
+ if (clkdiv != adau1701->pll_clkdiv) {
+ ret = adau1701_reset(codec, clkdiv);
+ if (ret < 0)
+ return ret;
+ }
switch (params_rate(params)) {
case 192000:
@@ -429,6 +480,7 @@ static int adau1701_set_sysclk(struct snd_soc_codec *codec, int clk_id,
int source, unsigned int freq, int dir)
{
unsigned int val;
+ struct adau1701 *adau1701 = snd_soc_codec_get_drvdata(codec);
switch (clk_id) {
case ADAU1701_CLK_SRC_OSC:
@@ -442,6 +494,7 @@ static int adau1701_set_sysclk(struct snd_soc_codec *codec, int clk_id,
}
snd_soc_update_bits(codec, ADAU1701_OSCIPOW, ADAU1701_OSCIPOW_OPD, val);
+ adau1701->sysclk = freq;
return 0;
}
@@ -489,11 +542,21 @@ MODULE_DEVICE_TABLE(of, adau1701_dt_ids);
static int adau1701_probe(struct snd_soc_codec *codec)
{
int ret;
+ struct adau1701 *adau1701 = snd_soc_codec_get_drvdata(codec);
codec->control_data = to_i2c_client(codec->dev);
- ret = adau1701_reset(codec);
- if (ret)
+ /*
+ * Let the pll_clkdiv variable default to something that won't happen
+ * at runtime. That way, we can postpone the firmware download from
+ * adau1701_reset() to a point in time when we know the correct PLL
+ * mode parameters.
+ */
+ adau1701->pll_clkdiv = ADAU1707_CLKDIV_UNSET;
+
+ /* initalize with pre-configured pll mode settings */
+ ret = adau1701_reset(codec, adau1701->pll_clkdiv);
+ if (ret < 0)
return ret;
return 0;
@@ -526,6 +589,7 @@ static int adau1701_i2c_probe(struct i2c_client *client,
struct adau1701 *adau1701;
struct device *dev = &client->dev;
int gpio_nreset = -EINVAL;
+ int gpio_pll_mode[2] = { -EINVAL, -EINVAL };
int ret;
adau1701 = devm_kzalloc(dev, sizeof(*adau1701), GFP_KERNEL);
@@ -536,6 +600,16 @@ static int adau1701_i2c_probe(struct i2c_client *client,
gpio_nreset = of_get_named_gpio(dev->of_node, "reset-gpio", 0);
if (gpio_nreset < 0 && gpio_nreset != -ENOENT)
return gpio_nreset;
+
+ gpio_pll_mode[0] = of_get_named_gpio(dev->of_node,
+ "adi,pll-mode-gpios", 0);
+ if (gpio_pll_mode[0] < 0 && gpio_pll_mode[0] != -ENOENT)
+ return gpio_pll_mode[0];
+
+ gpio_pll_mode[1] = of_get_named_gpio(dev->of_node,
+ "adi,pll-mode-gpios", 1);
+ if (gpio_pll_mode[1] < 0 && gpio_pll_mode[1] != -ENOENT)
+ return gpio_pll_mode[1];
}
if (gpio_is_valid(gpio_nreset)) {
@@ -545,7 +619,24 @@ static int adau1701_i2c_probe(struct i2c_client *client,
return ret;
}
+ if (gpio_is_valid(gpio_pll_mode[0]) &&
+ gpio_is_valid(gpio_pll_mode[1])) {
+ ret = devm_gpio_request_one(dev, gpio_pll_mode[0],
+ GPIOF_OUT_INIT_LOW,
+ "ADAU1701 PLL mode 0");
+ if (ret < 0)
+ return ret;
+
+ ret = devm_gpio_request_one(dev, gpio_pll_mode[1],
+ GPIOF_OUT_INIT_LOW,
+ "ADAU1701 PLL mode 1");
+ if (ret < 0)
+ return ret;
+ }
+
adau1701->gpio_nreset = gpio_nreset;
+ adau1701->gpio_pll_mode[0] = gpio_pll_mode[0];
+ adau1701->gpio_pll_mode[1] = gpio_pll_mode[1];
i2c_set_clientdata(client, adau1701);
ret = snd_soc_register_codec(&client->dev, &adau1701_codec_drv,
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-27 18:08:25 +0000