linux-kernel - [PATCH 2/2 v2] at91/dmaengine: integration of at

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Date:	Fri, 26 Jun 2009 12:42:16 +0200
From:	Nicolas Ferre <nicolas.ferre@...el.com>
To:	dan.j.williams@...el.com, maciej.sosnowski@...el.com,
	avictor.za@...il.com, linux-arm-kernel@...ts.arm.linux.org.uk
Cc:	patrice.vilchez@...el.com, linux-kernel@...r.kernel.org,
	nicolas.ferre@...el.com
Subject: [PATCH 2/2 v2] at91/dmaengine: integration of at_hdmac driver in at91sam9rl

This is the integration of DMA engine driver into at91sam9rl device file. The
associated driver is at_hdmac.

Signed-off-by: Nicolas Ferre <nicolas.ferre@...el.com>
---
This patch is based on async_tx.git/next and may need modification for
inclusion in the at91 patch submission flow.

 arch/arm/mach-at91/at91sam9rl_devices.c |   49 ++++++++++++++++++++++++++++++-
 1 files changed, 48 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mach-at91/at91sam9rl_devices.c b/arch/arm/mach-at91/at91sam9rl_devices.c
index 7281865..65a4997 100644
--- a/arch/arm/mach-at91/at91sam9rl_devices.c
+++ b/arch/arm/mach-at91/at91sam9rl_devices.c
@@ -21,11 +21,57 @@
 #include <mach/at91sam9rl.h>
 #include <mach/at91sam9rl_matrix.h>
 #include <mach/at91sam9_smc.h>
+#include <mach/at_hdmac.h>
 
 #include "generic.h"
 
 
 /* --------------------------------------------------------------------
+ *  HDMAC - AHB DMA Controller
+ * -------------------------------------------------------------------- */
+
+#if defined(CONFIG_AT_HDMAC) || defined(CONFIG_AT_HDMAC_MODULE)
+static u64 hdmac_dmamask = DMA_BIT_MASK(32);
+
+static struct at_dma_platform_data atdma_pdata = {
+	.nr_channels	= 2,
+};
+
+static struct resource hdmac_resources[] = {
+	[0] = {
+		.start	= AT91_BASE_SYS + AT91_DMA,
+		.end	= AT91_BASE_SYS + AT91_DMA + SZ_512 - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	[2] = {
+		.start	= AT91SAM9RL_ID_DMA,
+		.end	= AT91SAM9RL_ID_DMA,
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device at_hdmac_device = {
+	.name		= "at_hdmac",
+	.id		= -1,
+	.dev		= {
+				.dma_mask		= &hdmac_dmamask,
+				.coherent_dma_mask	= DMA_BIT_MASK(32),
+				.platform_data		= &atdma_pdata,
+	},
+	.resource	= hdmac_resources,
+	.num_resources	= ARRAY_SIZE(hdmac_resources),
+};
+
+void __init at91_add_device_hdmac(void)
+{
+	dma_cap_set(DMA_MEMCPY, atdma_pdata.cap_mask);
+	platform_device_register(&at_hdmac_device);
+}
+#else
+void __init at91_add_device_hdmac(void) {}
+#endif
+
+/* --------------------------------------------------------------------
  *  USB HS Device (Gadget)
  * -------------------------------------------------------------------- */
 
@@ -823,7 +869,7 @@ static struct resource dbgu_resources[] = {
 };
 
 static struct atmel_uart_data dbgu_data = {
-	.use_dma_tx	= 0,
+	.use_dma_tx	= 1,
 	.use_dma_rx	= 0,		/* DBGU not capable of receive DMA */
 	.regs		= (void __iomem *)(AT91_VA_BASE_SYS + AT91_DBGU),
 };
@@ -1103,6 +1149,7 @@ void __init at91_add_device_serial(void) {}
  */
 static int __init at91_add_standard_devices(void)
 {
+	at91_add_device_hdmac();
 	at91_add_device_rtc();
 	at91_add_device_rtt();
 	at91_add_device_watchdog();
-- 
1.5.3.7

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