ASoC: mpq8064: Add MI2S TX support to the machine driver
Add the MI2S TX support to the mpq8064 machine driver.
The MI2S TX is used as the audio input from HMDI input and
analog broadcasting to MPQ8064.
Change-Id: Ia17904f84ab9fd1243506fd8654aa2ff0ab012f1
Signed-off-by: Kuirong Wang <kuirongw@codeaurora.org>
diff --git a/sound/soc/msm/mpq8064.c b/sound/soc/msm/mpq8064.c
index 961f833..0ac4708 100644
--- a/sound/soc/msm/mpq8064.c
+++ b/sound/soc/msm/mpq8064.c
@@ -57,6 +57,14 @@
#define GPIO_SEC_I2S_RX_MCLK 50
#define I2S_MCLK_RATE 1536000
+#define GPIO_MI2S_WS 27
+#define GPIO_MI2S_SCLK 28
+#define GPIO_MI2S_DOUT3 29
+#define GPIO_MI2S_DOUT2 30
+#define GPIO_MI2S_DOUT1 31
+#define GPIO_MI2S_DOUT0 32
+#define GPIO_MI2S_MCLK 33
+
static struct clk *sec_i2s_rx_osr_clk;
static struct clk *sec_i2s_rx_bit_clk;
@@ -84,6 +92,41 @@
},
};
+static struct request_gpio mi2s_gpio[] = {
+ {
+ .gpio_no = GPIO_MI2S_WS,
+ .gpio_name = "MI2S_WS",
+ },
+ {
+ .gpio_no = GPIO_MI2S_SCLK,
+ .gpio_name = "MI2S_SCLK",
+ },
+ {
+ .gpio_no = GPIO_MI2S_DOUT3,
+ .gpio_name = "MI2S_DOUT3",
+ },
+ {
+ .gpio_no = GPIO_MI2S_DOUT2,
+ .gpio_name = "MI2S_DOUT2",
+ },
+ {
+ .gpio_no = GPIO_MI2S_DOUT1,
+ .gpio_name = "MI2S_DOUT1",
+ },
+ {
+ .gpio_no = GPIO_MI2S_DOUT0,
+ .gpio_name = "MI2S_DOUT0",
+ },
+ {
+ .gpio_no = GPIO_MI2S_MCLK,
+ .gpio_name = "MI2S_MCLK",
+ },
+};
+
+static struct clk *mi2s_bit_clk;
+
+
+
static u32 top_spk_pamp_gpio = PM8921_GPIO_PM_TO_SYS(18);
static u32 bottom_spk_pamp_gpio = PM8921_GPIO_PM_TO_SYS(19);
static int msm_spk_control;
@@ -815,6 +858,71 @@
return 0;
}
+static int msm_mi2s_free_gpios(void)
+{
+ int i;
+ for (i = 0; i < ARRAY_SIZE(mi2s_gpio); i++)
+ gpio_free(mi2s_gpio[i].gpio_no);
+ return 0;
+}
+
+static void msm_mi2s_shutdown(struct snd_pcm_substream *substream)
+{
+ if (mi2s_bit_clk) {
+ clk_disable(mi2s_bit_clk);
+ clk_put(mi2s_bit_clk);
+ mi2s_bit_clk = NULL;
+ }
+ msm_mi2s_free_gpios();
+}
+
+static int configure_mi2s_gpio(void)
+{
+ int rtn;
+ int i;
+ int j;
+ for (i = 0; i < ARRAY_SIZE(mi2s_gpio); i++) {
+ rtn = gpio_request(mi2s_gpio[i].gpio_no,
+ mi2s_gpio[i].gpio_name);
+ pr_debug("%s: gpio = %d, gpio name = %s, rtn = %d\n",
+ __func__,
+ mi2s_gpio[i].gpio_no,
+ mi2s_gpio[i].gpio_name,
+ rtn);
+ if (rtn) {
+ pr_err("%s: Failed to request gpio %d\n",
+ __func__,
+ mi2s_gpio[i].gpio_no);
+ for (j = i; j >= 0; j--)
+ gpio_free(mi2s_gpio[j].gpio_no);
+ goto err;
+ }
+ }
+err:
+ return rtn;
+}
+static int msm_mi2s_startup(struct snd_pcm_substream *substream)
+{
+ int ret = 0;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ configure_mi2s_gpio();
+ mi2s_bit_clk = clk_get(cpu_dai->dev, "bit_clk");
+ if (IS_ERR(mi2s_bit_clk))
+ return PTR_ERR(mi2s_bit_clk);
+ clk_set_rate(mi2s_bit_clk, 0);
+ ret = clk_enable(mi2s_bit_clk);
+ if (IS_ERR_VALUE(ret)) {
+ pr_err("Unable to enable mi2s_bit_clk\n");
+ clk_put(mi2s_bit_clk);
+ return ret;
+ }
+ ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_CBM_CFM);
+ if (IS_ERR_VALUE(ret))
+ pr_err("set format for CPU dai failed\n");
+ return ret;
+}
+
static int msm_startup(struct snd_pcm_substream *substream)
{
pr_debug("%s(): substream = %s stream = %d\n", __func__,
@@ -958,6 +1066,12 @@
.hw_params = mpq8064_sec_i2s_rx_hw_params,
};
+static struct snd_soc_ops msm_mi2s_tx_be_ops = {
+ .startup = msm_mi2s_startup,
+ .shutdown = msm_mi2s_shutdown,
+};
+
+
/* Digital audio interface glue - connects codec <---> CPU */
static struct snd_soc_dai_link msm_dai[] = {
/* FrontEnd DAI Links */
@@ -1142,6 +1256,19 @@
.be_id = MSM_BACKEND_DAI_HDMI_RX,
.be_hw_params_fixup = msm_hdmi_be_hw_params_fixup,
},
+ {
+ .name = LPASS_BE_MI2S_TX,
+ .stream_name = "MI2S Capture",
+ .cpu_dai_name = "msm-dai-q6.7",
+ .platform_name = "msm-pcm-routing",
+ .codec_name = "msm-stub-codec.1",
+ .codec_dai_name = "msm-stub-tx",
+ .no_pcm = 1,
+ .no_codec = 1,
+ .be_id = MSM_BACKEND_DAI_MI2S_TX,
+ .be_hw_params_fixup = msm_be_hw_params_fixup,
+ .ops = &msm_mi2s_tx_be_ops,
+ },
/* Backend AFE DAI Links */
{
.name = LPASS_BE_AFE_PCM_RX,