ARM: S5PC100: Add S/PDIF platform device

This patch add S/PDIF platform device to support S/PDIF PCM audio
on S5PC100.

Signed-off-by: Seungwhan Youn <sw.youn@samsung.com>
Acked-by: Jassi Brar <jassi.brar@samsung.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/mach-s5pc100/dev-audio.c

@@ -263,3 +263,57 @@ struct platform_device s5pc100_device_ac97 = {
 		.coherent_dma_mask = DMA_BIT_MASK(32),
 	},
 };
+
+/* S/PDIF Controller platform_device */
+static int s5pc100_spdif_cfg_gpd(struct platform_device *pdev)
+{
+	s3c_gpio_cfgpin_range(S5PC100_GPD(5), 2, S3C_GPIO_SFN(3));
+
+	return 0;
+}
+
+static int s5pc100_spdif_cfg_gpg3(struct platform_device *pdev)
+{
+	s3c_gpio_cfgpin_range(S5PC100_GPG3(5), 2, S3C_GPIO_SFN(3));
+
+	return 0;
+}
+
+static struct resource s5pc100_spdif_resource[] = {
+	[0] = {
+		.start	= S5PC100_PA_SPDIF,
+		.end	= S5PC100_PA_SPDIF + 0x100 - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	[1] = {
+		.start	= DMACH_SPDIF,
+		.end	= DMACH_SPDIF,
+		.flags	= IORESOURCE_DMA,
+	},
+};
+
+static struct s3c_audio_pdata s5p_spdif_pdata = {
+	.cfg_gpio = s5pc100_spdif_cfg_gpd,
+};
+
+static u64 s5pc100_spdif_dmamask = DMA_BIT_MASK(32);
+
+struct platform_device s5pc100_device_spdif = {
+	.name		= "samsung-spdif",
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(s5pc100_spdif_resource),
+	.resource	= s5pc100_spdif_resource,
+	.dev = {
+		.platform_data = &s5p_spdif_pdata,
+		.dma_mask = &s5pc100_spdif_dmamask,
+		.coherent_dma_mask = DMA_BIT_MASK(32),
+	},
+};
+
+void __init s5pc100_spdif_setup_gpio(int gpio)
+{
+	if (gpio == S5PC100_SPDIF_GPD)
+		s5p_spdif_pdata.cfg_gpio = s5pc100_spdif_cfg_gpd;
+	else
+		s5p_spdif_pdata.cfg_gpio = s5pc100_spdif_cfg_gpg3;
+}

arch/arm/mach-s5pc100/include/mach/map.h

@@ -110,6 +110,8 @@
 #define S5PC100_PA_PCM0		0xF2400000
 #define S5PC100_PA_PCM1		0xF2500000
 
+#define S5PC100_PA_SPDIF	0xF2600000
+
 #define S5PC100_PA_TSADC	(0xF3000000)
 
 /* KEYPAD */

arch/arm/mach-s5pc100/mach-smdkc100.c

@@ -47,6 +47,7 @@
 #include <plat/adc.h>
 #include <plat/keypad.h>
 #include <plat/ts.h>
+#include <plat/audio.h>
 
 /* Following are default values for UCON, ULCON and UFCON UART registers */
 #define SMDKC100_UCON_DEFAULT	(S3C2410_UCON_TXILEVEL |	\
@@ -196,6 +197,7 @@ static struct platform_device *smdkc100_devices[] __initdata = {
 	&s5p_device_fimc0,
 	&s5p_device_fimc1,
 	&s5p_device_fimc2,
+	&s5pc100_device_spdif,
 };
 
 static struct s3c2410_ts_mach_info s3c_ts_platform __initdata = {
@@ -226,6 +228,8 @@ static void __init smdkc100_machine_init(void)
 
 	samsung_keypad_set_platdata(&smdkc100_keypad_data);
 
+	s5pc100_spdif_setup_gpio(S5PC100_SPDIF_GPD);
+
 	/* LCD init */
 	gpio_request(S5PC100_GPD(0), "GPD");
 	gpio_request(S5PC100_GPH0(6), "GPH0");

arch/arm/plat-samsung/include/plat/audio.h

@@ -16,6 +16,15 @@
 #define S3C64XX_AC97_GPE  1
 extern void s3c64xx_ac97_setup_gpio(int);
 
+/*
+ * The machine init code calls s5p*_spdif_setup_gpio with
+ * one of these defines in order to select appropriate bank
+ * of GPIO for S/PDIF pins
+ */
+#define S5PC100_SPDIF_GPD  0
+#define S5PC100_SPDIF_GPG3 1
+extern void s5pc100_spdif_setup_gpio(int);
+
 /**
  * struct s3c_audio_pdata - common platform data for audio device drivers
  * @cfg_gpio: Callback function to setup mux'ed pins in I2S/PCM/AC97 mode

arch/arm/plat-samsung/include/plat/devs.h

@@ -111,6 +111,7 @@ extern struct platform_device s5pc100_device_pcm1;
 extern struct platform_device s5pc100_device_iis0;
 extern struct platform_device s5pc100_device_iis1;
 extern struct platform_device s5pc100_device_iis2;
+extern struct platform_device s5pc100_device_spdif;
 
 extern struct platform_device samsung_device_keypad;