ENGR00139265-4 mxc alsa soc spdif driver

* Add support for S/PDIF on i.Mx6

Signed-off-by: Alan Tull <alan.tull@freescale.com>

9 files changed, 75 insertions, 5 deletions

diff --git a/arch/arm/configs/imx6_defconfig b/arch/arm/configs/imx6_defconfig
index 891e0c1d184..a24c80355c3 100644
--- a/arch/arm/configs/imx6_defconfig
+++ b/arch/arm/configs/imx6_defconfig
@@ -275,6 +275,7 @@ CONFIG_IMX_HAVE_PLATFORM_AHCI=y
 CONFIG_IMX_HAVE_PLATFORM_IMX_OCOTP=y
 CONFIG_IMX_HAVE_PLATFORM_IMX_VIIM=y
 CONFIG_IMX_HAVE_PLATFORM_LDB=y
+CONFIG_IMX_HAVE_PLATFORM_IMX_SPDIF=y
 CONFIG_IMX_HAVE_PLATFORM_VIV_GPU=y
 CONFIG_IMX_HAVE_PLATFORM_MXC_HDMI=y
 CONFIG_IMX_HAVE_PLATFORM_IMX_ANATOP_THERMAL=y
@@ -1450,10 +1451,12 @@ CONFIG_SND_SOC=y
 CONFIG_SND_SOC_AC97_BUS=y
 CONFIG_SND_IMX_SOC=y
 CONFIG_SND_MXC_SOC_MX2=y
+CONFIG_SND_MXC_SOC_SPDIF_DAI=y
 CONFIG_SND_SOC_IMX_CS42888=y
-# CONFIG_SND_SOC_IMX_SPDIF is not set
+CONFIG_SND_SOC_IMX_SPDIF=y
 CONFIG_SND_SOC_I2C_AND_SPI=y
 # CONFIG_SND_SOC_ALL_CODECS is not set
+CONFIG_SND_SOC_MXC_SPDIF=y
 CONFIG_SND_SOC_CS42888=y
 # CONFIG_SOUND_PRIME is not set
 CONFIG_AC97_BUS=y
diff --git a/arch/arm/mach-mx6/Kconfig b/arch/arm/mach-mx6/Kconfig
index 9fddbdf2190..d9f68946888 100644
--- a/arch/arm/mach-mx6/Kconfig
+++ b/arch/arm/mach-mx6/Kconfig
@@ -12,6 +12,7 @@ config ARCH_MX6Q
 	select IMX_HAVE_PLATFORM_IMX_IPUV3
 	select IMX_HAVE_PLATFORM_MXC_PWM
 	select IMX_HAVE_PLATFORM_LDB
+	select IMX_HAVE_PLATFORM_IMX_SPDIF
 
 config FORCE_MAX_ZONEORDER
     int "MAX_ORDER"
@@ -48,6 +49,7 @@ config MACH_MX6Q_SABREAUTO
 	select IMX_HAVE_PLATFORM_IMX_PM
 	select IMX_HAVE_PLATFORM_MXC_HDMI
 	select IMX_HAVE_PLATFORM_IMX_ASRC
+	select IMX_HAVE_PLATFORM_IMX_SPDIF
 	help
 	  Include support for i.MX 6Quad SABRE Automotive Infotainment platform. This includes specific
 	  configurations for the board and its peripherals.
diff --git a/arch/arm/mach-mx6/board-mx6q_sabreauto.c b/arch/arm/mach-mx6/board-mx6q_sabreauto.c
index 4a71738f1ee..9149cb68e97 100644
--- a/arch/arm/mach-mx6/board-mx6q_sabreauto.c
+++ b/arch/arm/mach-mx6/board-mx6q_sabreauto.c
@@ -264,6 +264,10 @@ static iomux_v3_cfg_t mx6q_sabreauto_pads[] = {
 
 	/* USBOTG ID pin */
 	MX6Q_PAD_GPIO_1__USBOTG_ID,
+
+	/* SPDIF */
+	MX6Q_PAD_GPIO_16__SPDIF_IN1,
+	MX6Q_PAD_GPIO_17__SPDIF_OUT1,
 };
 
 static iomux_v3_cfg_t mx6q_sabreauto_esai_record_pads[] = {
@@ -869,6 +873,35 @@ static inline void __init mx6q_csi0_io_init(void)
 	gpio_set_value(MX6Q_SMD_CSI0_PWN, 0);
 	mxc_iomux_set_gpr_register(1, 19, 1, 1);
 }
+
+static int spdif_clk_set_rate(struct clk *clk, unsigned long rate)
+{
+	unsigned long rate_actual;
+	rate_actual = clk_round_rate(clk, rate);
+	clk_set_rate(clk, rate_actual);
+	return 0;
+}
+
+static struct mxc_spdif_platform_data mxc_spdif_data = {
+	.spdif_tx = 1,		/* enable tx */
+	.spdif_rx = 1,		/* enable rx */
+	/*
+	 * spdif0_clk will be 454.7MHz divided by ccm dividers.
+	 *
+	 * 44.1KHz: 454.7MHz / 7 (ccm) / 23 (spdif) = 44,128 Hz ~ 0.06% error
+	 * 48KHz:   454.7MHz / 4 (ccm) / 37 (spdif) = 48,004 Hz ~ 0.01% error
+	 * 32KHz:   454.7MHz / 6 (ccm) / 37 (spdif) = 32,003 Hz ~ 0.01% error
+	 */
+	.spdif_clk_44100 = 1,	/* tx clk from spdif0_clk_root */
+	.spdif_clk_48000 = 1,	/* tx clk from spdif0_clk_root */
+	.spdif_div_44100 = 23,
+	.spdif_div_48000 = 37,
+	.spdif_div_32000 = 37,
+	.spdif_rx_clk = 0,	/* rx clk from spdif stream */
+	.spdif_clk_set_rate = spdif_clk_set_rate,
+	.spdif_clk = NULL,	/* spdif bus clk */
+};
+
 /*!
  * Board specific initialization.
  */
@@ -954,6 +987,12 @@ static void __init mx6_board_init(void)
 	imx6q_add_gpmi(&mx6q_gpmi_nfc_platform_data);
 
 	imx6q_add_dvfs_core(&sabreauto_dvfscore_data);
+
+	mxc_spdif_data.spdif_core_clk = clk_get_sys("mxc_spdif.0", NULL);
+	clk_put(mxc_spdif_data.spdif_core_clk);
+	imx6q_add_spdif(&mxc_spdif_data);
+	imx6q_add_spdif_dai();
+	imx6q_add_spdif_audio_device();
 }
 
 extern void __iomem *twd_base;
diff --git a/arch/arm/mach-mx6/clock.c b/arch/arm/mach-mx6/clock.c
index 007fd7b17a9..fe9dba23cc9 100644
--- a/arch/arm/mach-mx6/clock.c
+++ b/arch/arm/mach-mx6/clock.c
@@ -4483,7 +4483,7 @@ static struct clk_lookup lookups[] = {
 	_REGISTER_CLOCK("FlexCAN.1", "can_clk", can2_clk[0]),
 	_REGISTER_CLOCK(NULL, "ldb_di0_clk", ldb_di0_clk),
 	_REGISTER_CLOCK(NULL, "ldb_di1_clk", ldb_di1_clk),
-	_REGISTER_CLOCK(NULL, "mxc_alsa_spdif.0", spdif0_clk[0]),
+	_REGISTER_CLOCK("mxc_spdif.0", NULL, spdif0_clk[0]),
 	_REGISTER_CLOCK(NULL, "esai_clk", esai_clk),
 	_REGISTER_CLOCK("mxc_spi.0", NULL, ecspi_clk[0]),
 	_REGISTER_CLOCK("mxc_spi.1", NULL, ecspi_clk[1]),
@@ -4653,6 +4653,9 @@ int __init mx6_clocks_init(unsigned long ckil, unsigned long osc,
 	/* Lower the ipg_perclk frequency to 8.25MHz. */
 	clk_set_rate(&ipg_perclk, 8250000);
 
+	/* S/PDIF */
+	clk_set_parent(&spdif0_clk[0], &pll3_pfd_454M);
+
 	base = ioremap(GPT_BASE_ADDR, SZ_4K);
 	mxc_timer_init(&gpt_clk[0], base, MXC_INT_GPT);
 
diff --git a/arch/arm/mach-mx6/devices-imx6q.h b/arch/arm/mach-mx6/devices-imx6q.h
index b607758074c..98c94cbabf1 100644
--- a/arch/arm/mach-mx6/devices-imx6q.h
+++ b/arch/arm/mach-mx6/devices-imx6q.h
@@ -143,3 +143,14 @@ extern const struct imx_dvfs_core_data imx6q_dvfs_core_data __initconst;
 #define imx6q_add_dvfs_core(pdata)	\
 	imx_add_dvfs_core(&imx6q_dvfs_core_data, pdata)
 
+extern const struct imx_viv_gpu_data imx6_gc2000_data __initconst;
+extern const struct imx_viv_gpu_data imx6_gc320_data __initconst;
+extern const struct imx_viv_gpu_data imx6_gc355_data __initconst;
+
+extern const struct imx_spdif_data imx6q_imx_spdif_data __initconst;
+#define imx6q_add_spdif(pdata)	imx_add_spdif(&imx6q_imx_spdif_data, pdata)
+
+extern const struct imx_spdif_dai_data imx6q_spdif_dai_data __initconst;
+#define imx6q_add_spdif_dai()	imx_add_spdif_dai(&imx6q_spdif_dai_data)
+
+#define imx6q_add_spdif_audio_device(pdata)	imx_add_spdif_audio_device()
diff --git a/arch/arm/plat-mxc/devices/platform-imx-spdif-dai.c b/arch/arm/plat-mxc/devices/platform-imx-spdif-dai.c
index 516ebc52467..7e0a97b14c3 100644
--- a/arch/arm/plat-mxc/devices/platform-imx-spdif-dai.c
+++ b/arch/arm/plat-mxc/devices/platform-imx-spdif-dai.c
@@ -33,6 +33,11 @@ const struct imx_spdif_dai_data imx53_spdif_dai_data __initconst =
 			imx_spdif_dai_data_entry(MX53);
 #endif /* ifdef CONFIG_SOC_IMX53 */
 
+#ifdef CONFIG_SOC_IMX6Q
+const struct imx_spdif_dai_data imx6q_spdif_dai_data __initconst =
+			imx_spdif_dai_data_entry(MX6Q);
+#endif /* #ifdef CONFIG_SOC_IMX6Q */
+
 struct platform_device *__init imx_add_spdif_dai(
 			const struct imx_spdif_dai_data *data)
 {
diff --git a/arch/arm/plat-mxc/devices/platform-imx-spdif.c b/arch/arm/plat-mxc/devices/platform-imx-spdif.c
index 80a5e782067..90a58899f92 100644
--- a/arch/arm/plat-mxc/devices/platform-imx-spdif.c
+++ b/arch/arm/plat-mxc/devices/platform-imx-spdif.c
@@ -42,6 +42,11 @@ const struct imx_spdif_data imx53_imx_spdif_data __initconst =
 			imx5_spdif_data_entry_single(MX53);
 #endif /* ifdef CONFIG_SOC_IMX53 */
 
+#ifdef CONFIG_SOC_IMX6Q
+const struct imx_spdif_data imx6q_imx_spdif_data __initconst =
+			imx5_spdif_data_entry_single(MX6Q);
+#endif /* ifdef CONFIG_SOC_IMX6Q */
+
 struct platform_device *__init imx_add_spdif(
 		const struct imx_spdif_data *data,
 		const struct mxc_spdif_platform_data *pdata)
diff --git a/arch/arm/plat-mxc/include/mach/iomux-mx6q.h b/arch/arm/plat-mxc/include/mach/iomux-mx6q.h
index c48fe755cac..8927779bbb0 100644
--- a/arch/arm/plat-mxc/include/mach/iomux-mx6q.h
+++ b/arch/arm/plat-mxc/include/mach/iomux-mx6q.h
@@ -78,6 +78,8 @@ typedef enum iomux_config {
 #define MX6Q_GPMI_PAD_CTRL1 (PAD_CTL_DSE_40ohm | PAD_CTL_SPEED_MED | PAD_CTL_SRE_FAST)
 #define MX6Q_GPMI_PAD_CTRL2 (MX6Q_GPMI_PAD_CTRL0 | MX6Q_GPMI_PAD_CTRL1)
 
+#define MX6Q_SPDIF_OUT_PAD_CTRL (PAD_CTL_DSE_120ohm | PAD_CTL_SRE_FAST)
+
 #define _MX6Q_PAD_SD2_DAT1__USDHC2_DAT1				\
 		IOMUX_PAD(0x0360, 0x004C, 0, 0x0000, 0, 0)
 #define _MX6Q_PAD_SD2_DAT1__ECSPI5_SS0				\
@@ -6029,7 +6031,7 @@ typedef enum iomux_config {
 #define  MX6Q_PAD_GPIO_17__SDMA_SDMA_EXT_EVENT_0		\
 		(_MX6Q_PAD_GPIO_17__SDMA_SDMA_EXT_EVENT_0 | MUX_PAD_CTRL(NO_PAD_CTRL))
 #define  MX6Q_PAD_GPIO_17__SPDIF_OUT1		\
-		(_MX6Q_PAD_GPIO_17__SPDIF_OUT1 | MUX_PAD_CTRL(NO_PAD_CTRL))
+		(_MX6Q_PAD_GPIO_17__SPDIF_OUT1 | MUX_PAD_CTRL(MX6Q_SPDIF_OUT_PAD_CTRL))
 #define  MX6Q_PAD_GPIO_17__GPIO_7_12		\
 		(_MX6Q_PAD_GPIO_17__GPIO_7_12 | MUX_PAD_CTRL(NO_PAD_CTRL))
 #define  MX6Q_PAD_GPIO_17__SJC_JTAG_ACT		\
diff --git a/arch/arm/plat-mxc/include/mach/mx6.h b/arch/arm/plat-mxc/include/mach/mx6.h
index cead192fc94..9103e9d13ff 100644
--- a/arch/arm/plat-mxc/include/mach/mx6.h
+++ b/arch/arm/plat-mxc/include/mach/mx6.h
@@ -130,7 +130,7 @@
 #define ATZ2_BASE_ADDR              AIPS2_ARB_BASE_ADDR
 
 /* slots 0,7 of SDMA reserved, therefore left unused in IPMUX3 */
-#define SPDIF_BASE_ADDR             (ATZ1_BASE_ADDR + 0x04000) /* slot 1 */
+#define MX6Q_SPDIF_BASE_ADDR             (ATZ1_BASE_ADDR + 0x04000) /* slot 1 */
 #define MX6Q_ECSPI1_BASE_ADDR            (ATZ1_BASE_ADDR + 0x08000) /* slot 2 */
 #define MX6Q_ECSPI2_BASE_ADDR            (ATZ1_BASE_ADDR + 0x0C000) /* slot 3 */
 #define MX6Q_ECSPI3_BASE_ADDR            (ATZ1_BASE_ADDR + 0x10000) /* slot 4 */
@@ -330,7 +330,7 @@
 #define MXC_INT_ANATOP_TEMPSNSR                    81
 #define MX6Q_INT_ASRC                               82
 #define MXC_INT_ESAI                              83
-#define MXC_INT_SPDIF                              84
+#define MX6Q_INT_SPDIF                              84
 #define MXC_INT_MLB                                85
 #define MXC_INT_ANATOP_ANA1                        86
 #define MXC_INT_GPT                                87