From 2f47c8c5556e91f309e24162263ebacff6973007 Mon Sep 17 00:00:00 2001
From: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Date: Tue, 24 Mar 2009 13:59:23 +0100
Subject: avr32: at32ap700x: setup DMA for AC97C in the machine code

This patch will adjust the setup the DMA controller for the AC97
Controller in the at32ap700x machine code. This setup matches the new
ALSA driver for the AC97C.

The struct ac97c_platform_data has been moved into its own header file
located in the sound include path.

Tested on ATSTK1006 + ATSTK1000.

This patch will setup the AC97 controller properly for the adjusted
machine code. Both EVKLCD10x and Hammerhead board has been updated.

Tested on EVKLCD10x, and copied to Hammerhead board.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
[haavard.skinnemoen@atmel.com: fold with board code update]
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
---
 arch/avr32/mach-at32ap/at32ap700x.c         | 51 ++++++++++++++++++++---------
 arch/avr32/mach-at32ap/include/mach/board.h | 10 ++----
 2 files changed, 38 insertions(+), 23 deletions(-)

(limited to 'arch/avr32/mach-at32ap')

diff --git a/arch/avr32/mach-at32ap/at32ap700x.c b/arch/avr32/mach-at32ap/at32ap700x.c
index 1bc6389b20b0..62501d64322c 100644
--- a/arch/avr32/mach-at32ap/at32ap700x.c
+++ b/arch/avr32/mach-at32ap/at32ap700x.c
@@ -27,6 +27,7 @@
 #include <mach/sram.h>
 
 #include <sound/atmel-abdac.h>
+#include <sound/atmel-ac97c.h>
 
 #include <video/atmel_lcdc.h>
 
@@ -1982,11 +1983,14 @@ static struct clk atmel_ac97c0_pclk = {
 };
 
 struct platform_device *__init
-at32_add_device_ac97c(unsigned int id, struct ac97c_platform_data *data)
+at32_add_device_ac97c(unsigned int id, struct ac97c_platform_data *data,
+		      unsigned int flags)
 {
-	struct platform_device *pdev;
-	struct ac97c_platform_data _data;
-	u32 pin_mask;
+	struct platform_device		*pdev;
+	struct dw_dma_slave		*rx_dws;
+	struct dw_dma_slave		*tx_dws;
+	struct ac97c_platform_data	_data;
+	u32				pin_mask;
 
 	if (id != 0)
 		return NULL;
@@ -1997,37 +2001,52 @@ at32_add_device_ac97c(unsigned int id, struct ac97c_platform_data *data)
 
 	if (platform_device_add_resources(pdev, atmel_ac97c0_resource,
 				ARRAY_SIZE(atmel_ac97c0_resource)))
-		goto fail;
+		goto out_free_resources;
 
 	if (!data) {
 		data = &_data;
 		memset(data, 0, sizeof(struct ac97c_platform_data));
-		data->reset_pin = GPIO_PIN_NONE;
+		data->reset_pin = -ENODEV;
 	}
 
-	data->dma_rx_periph_id = 3;
-	data->dma_tx_periph_id = 4;
-	data->dma_controller_id = 0;
+	rx_dws = &data->rx_dws;
+	tx_dws = &data->tx_dws;
+
+	/* Check if DMA slave interface for capture should be configured. */
+	if (flags & AC97C_CAPTURE) {
+		rx_dws->dma_dev = &dw_dmac0_device.dev;
+		rx_dws->reg_width = DW_DMA_SLAVE_WIDTH_16BIT;
+		rx_dws->cfg_hi = DWC_CFGH_SRC_PER(3);
+		rx_dws->cfg_lo &= ~(DWC_CFGL_HS_DST_POL | DWC_CFGL_HS_SRC_POL);
+	}
+
+	/* Check if DMA slave interface for playback should be configured. */
+	if (flags & AC97C_PLAYBACK) {
+		tx_dws->dma_dev = &dw_dmac0_device.dev;
+		tx_dws->reg_width = DW_DMA_SLAVE_WIDTH_16BIT;
+		tx_dws->cfg_hi = DWC_CFGH_DST_PER(4);
+		tx_dws->cfg_lo &= ~(DWC_CFGL_HS_DST_POL | DWC_CFGL_HS_SRC_POL);
+	}
 
 	if (platform_device_add_data(pdev, data,
 				sizeof(struct ac97c_platform_data)))
-		goto fail;
+		goto out_free_resources;
 
-	pin_mask  = (1 << 20) | (1 << 21);	/* SDO & SYNC */
-	pin_mask |= (1 << 22) | (1 << 23);	/* SCLK & SDI */
+	/* SDO | SYNC | SCLK | SDI */
+	pin_mask = (1 << 20) | (1 << 21) | (1 << 22) | (1 << 23);
 
 	select_peripheral(PIOB, pin_mask, PERIPH_B, 0);
 
-	/* TODO: gpio_is_valid(data->reset_pin) with kernel 2.6.26. */
-	if (data->reset_pin != GPIO_PIN_NONE)
-		at32_select_gpio(data->reset_pin, 0);
+	if (gpio_is_valid(data->reset_pin))
+		at32_select_gpio(data->reset_pin, AT32_GPIOF_OUTPUT
+				| AT32_GPIOF_HIGH);
 
 	atmel_ac97c0_pclk.dev = &pdev->dev;
 
 	platform_device_add(pdev);
 	return pdev;
 
-fail:
+out_free_resources:
 	platform_device_put(pdev);
 	return NULL;
 }
diff --git a/arch/avr32/mach-at32ap/include/mach/board.h b/arch/avr32/mach-at32ap/include/mach/board.h
index 63ec4008b253..b363b067b0a4 100644
--- a/arch/avr32/mach-at32ap/include/mach/board.h
+++ b/arch/avr32/mach-at32ap/include/mach/board.h
@@ -88,14 +88,10 @@ struct mci_platform_data;
 struct platform_device *
 at32_add_device_mci(unsigned int id, struct mci_platform_data *data);
 
-struct ac97c_platform_data {
-	unsigned short dma_rx_periph_id;
-	unsigned short dma_tx_periph_id;
-	unsigned short dma_controller_id;
-	int reset_pin;
-};
+struct ac97c_platform_data;
 struct platform_device *
-at32_add_device_ac97c(unsigned int id, struct ac97c_platform_data *data);
+at32_add_device_ac97c(unsigned int id, struct ac97c_platform_data *data,
+		      unsigned int flags);
 
 struct atmel_abdac_pdata;
 struct platform_device *
-- 
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