ARM: 5709/1: at91: add AC97 support to at91sam9g45 series and at91sam9m10g45ek board

Add the support of AC97 on the at91sam9g45 chip series and -ek board.
It will share the code with AVR32 ac97c alsa driver "atmel_ac97c".

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Andrew Victor <linux@maxim.org.za>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 65 insertions, 0 deletions

diff --git a/arch/arm/mach-at91/at91sam9g45_devices.c b/arch/arm/mach-at91/at91sam9g45_devices.c
index 45720c84f0bf..d581cff80c4c 100644
--- a/arch/arm/mach-at91/at91sam9g45_devices.c
+++ b/arch/arm/mach-at91/at91sam9g45_devices.c
@@ -598,6 +598,61 @@ void __init at91_add_device_spi(struct spi_board_info *devices, int nr_devices)
 
 
 /* --------------------------------------------------------------------
+ *  AC97
+ * -------------------------------------------------------------------- */
+
+#if defined(CONFIG_SND_ATMEL_AC97C) || defined(CONFIG_SND_ATMEL_AC97C_MODULE)
+static u64 ac97_dmamask = DMA_BIT_MASK(32);
+static struct ac97c_platform_data ac97_data;
+
+static struct resource ac97_resources[] = {
+        [0] = {
+                .start  = AT91SAM9G45_BASE_AC97C,
+                .end    = AT91SAM9G45_BASE_AC97C + SZ_16K - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start  = AT91SAM9G45_ID_AC97C,
+                .end    = AT91SAM9G45_ID_AC97C,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct platform_device at91sam9g45_ac97_device = {
+        .name           = "atmel_ac97c",
+        .id             = 0,
+        .dev            = {
+                                .dma_mask               = &ac97_dmamask,
+                                .coherent_dma_mask      = DMA_BIT_MASK(32),
+                                .platform_data          = &ac97_data,
+        },
+        .resource       = ac97_resources,
+        .num_resources  = ARRAY_SIZE(ac97_resources),
+};
+
+void __init at91_add_device_ac97(struct ac97c_platform_data *data)
+{
+        if (!data)
+                return;
+
+        at91_set_A_periph(AT91_PIN_PD8, 0);     /* AC97FS */
+        at91_set_A_periph(AT91_PIN_PD9, 0);     /* AC97CK */
+        at91_set_A_periph(AT91_PIN_PD7, 0);     /* AC97TX */
+        at91_set_A_periph(AT91_PIN_PD6, 0);     /* AC97RX */
+
+        /* reset */
+        if (data->reset_pin)
+                at91_set_gpio_output(data->reset_pin, 0);
+
+        ac97_data = *data;
+        platform_device_register(&at91sam9g45_ac97_device);
+}
+#else
+void __init at91_add_device_ac97(struct ac97c_platform_data *data) {}
+#endif
+
+
+/* --------------------------------------------------------------------
  *  LCD Controller
  * -------------------------------------------------------------------- */
 
diff --git a/arch/arm/mach-at91/board-sam9m10g45ek.c b/arch/arm/mach-at91/board-sam9m10g45ek.c
index b8558eae5229..64c3843f323d 100644
--- a/arch/arm/mach-at91/board-sam9m10g45ek.c
+++ b/arch/arm/mach-at91/board-sam9m10g45ek.c
@@ -311,6 +311,14 @@ static void __init ek_add_device_buttons(void) {}
 
 
 /*
+ * AC97
+ * reset_pin is not connected: NRST
+ */
+static struct ac97c_platform_data ek_ac97_data = {
+};
+
+
+/*
  * LEDs ... these could all be PWM-driven, for variable brightness
  */
 static struct gpio_led ek_leds[] = {
@@ -372,6 +380,8 @@ static void __init ek_board_init(void)
         at91_add_device_lcdc(&ek_lcdc_data);
         /* Push Buttons */
         ek_add_device_buttons();
+        /* AC97 */
+        at91_add_device_ac97(&ek_ac97_data);
         /* LEDs */
         at91_gpio_leds(ek_leds, ARRAY_SIZE(ek_leds));
         at91_pwm_leds(ek_pwm_led, ARRAY_SIZE(ek_pwm_led));