openwrtv4/target/linux/lantiq/patches-3.9/0002-MIPS-lantiq-adds-4dword-burst-length-for-dma.patch
Jonas Gorski 0d9f760f27 kernel: update linux 3.9 to 3.9.8
Includes memory allocation fixes as well as several networking fixes.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

SVN-Revision: 37103
2013-06-30 13:10:12 +00:00

29 lines
1.2 KiB
Diff

From e9e520f4f10fdd673e5083bdc082515425ed7457 Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Thu, 6 Dec 2012 11:59:23 +0100
Subject: [PATCH 02/22] MIPS: lantiq: adds 4dword burst length for dma
---
arch/mips/lantiq/xway/dma.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/arch/mips/lantiq/xway/dma.c
+++ b/arch/mips/lantiq/xway/dma.c
@@ -48,6 +48,7 @@
#define DMA_IRQ_ACK 0x7e /* IRQ status register */
#define DMA_POLL BIT(31) /* turn on channel polling */
#define DMA_CLK_DIV4 BIT(6) /* polling clock divider */
+#define DMA_4W_BURST BIT(2) /* 4 word burst length */
#define DMA_2W_BURST BIT(1) /* 2 word burst length */
#define DMA_MAX_CHANNEL 20 /* the soc has 20 channels */
#define DMA_ETOP_ENDIANNESS (0xf << 8) /* endianness swap etop channels */
@@ -196,7 +197,8 @@ ltq_dma_init_port(int p)
* Tell the DMA engine to swap the endianness of data frames and
* drop packets if the channel arbitration fails.
*/
- ltq_dma_w32_mask(0, DMA_ETOP_ENDIANNESS | DMA_PDEN,
+ ltq_dma_w32_mask(0, (DMA_4W_BURST << 4) | (DMA_4W_BURST << 2) |
+ DMA_ETOP_ENDIANNESS | DMA_PDEN,
LTQ_DMA_PCTRL);
break;