[ARM] tegra: stingray: configure board for audio through i2s1

Signed-off-by: Iliyan Malchev <malchev@google.com>

diff --git a/arch/arm/mach-tegra/board-stingray.c b/arch/arm/mach-tegra/board-stingray.c
index c241704fb0762622e39614db5043f0af051b0380..035358732624678a3263c9cc1b8df4092445169a 100644 (file)
--- a/arch/arm/mach-tegra/board-stingray.c
+++ b/arch/arm/mach-tegra/board-stingray.c
@@ -43,6 +43,8 @@
 #include <mach/gpio.h>
 #include <mach/clk.h>
 #include <mach/usb_phy.h>
+#include <mach/i2s.h>
+#include <mach/audio.h>
 
 #include <linux/usb/android_composite.h>
 
@@ -222,6 +224,17 @@ static struct platform_device cpcap_otg = {
        .num_resources = ARRAY_SIZE(cpcap_otg_resources),
 };
 
+static struct tegra_audio_platform_data tegra_audio_pdata = {
+       .master         = false,
+       .dma_on         = true,  /* use dma by default */
+       .i2s_clk_rate   = 240000000,
+       .dap_clk        = "clk_dev1",
+       .audio_sync_clk = "audio_2x",
+       .mode           = I2S_BIT_FORMAT_I2S,
+       .fifo_fmt       = I2S_FIFO_16_LSB,
+       .bit_size       = I2S_BIT_SIZE_16,
+};
+
 static char *usb_functions[] = { "mtp" };
 static char *usb_functions_adb[] = { "mtp", "adb" };
 
@@ -440,6 +453,7 @@ static struct platform_device *stingray_devices[] __initdata = {
        &tegra_gart_dev,
        &ram_console_device,
        &tegra_isp,
+       &tegra_i2s_device1,
 };
 
 extern struct tegra_sdhci_platform_data stingray_wifi_data; /* sdhci2 */
@@ -662,6 +676,30 @@ static struct tegra_suspend_platform_data stingray_suspend = {
        .wake_any = 0,
 };
 
+static void *das_base = IO_ADDRESS(TEGRA_APB_MISC_BASE);
+
+static inline void das_writel(unsigned long value, unsigned long offset)
+{
+       writel(value, das_base + offset);
+}
+
+#define APB_MISC_DAS_DAP_CTRL_SEL_0             0xc00
+#define APB_MISC_DAS_DAC_INPUT_DATA_CLK_SEL_0   0xc40
+
+static void init_das(void)
+{
+       bool master = tegra_audio_pdata.master;
+
+       /* DAC1 -> DAP1 */
+       das_writel((!master)<<31, APB_MISC_DAS_DAP_CTRL_SEL_0);
+       das_writel(0, APB_MISC_DAS_DAC_INPUT_DATA_CLK_SEL_0);
+
+       /* DAC2 -> DAP2 */
+       das_writel((!master)<<31 | 1, APB_MISC_DAS_DAP_CTRL_SEL_0 + 4);
+       das_writel(1<<28 | 1<<24 | 1,
+                       APB_MISC_DAS_DAC_INPUT_DATA_CLK_SEL_0 + 4);
+}
+
 extern int nvmap_add_carveout_heap(unsigned long, size_t, const char *,
                                   unsigned int);
 
@@ -733,6 +771,9 @@ static void __init tegra_stingray_init(void)
        tegra_periph_reset_deassert(clk);
        clk_put(clk);
 
+       init_das();
+       tegra_i2s_device1.dev.platform_data = &tegra_audio_pdata;
+
        platform_add_devices(stingray_devices, ARRAY_SIZE(stingray_devices));
 
        stingray_i2c_init();