| 1 | From 07f7321c0f79c0b800d28898a480d044f839e813 Mon Sep 17 00:00:00 2001 |
| 2 | From: John Crispin <blogic@openwrt.org> |
| 3 | Date: Thu, 6 Dec 2012 11:59:23 +0100 |
| 4 | Subject: [PATCH 104/123] MIPS: lantiq: adds 4dword burst length for dma |
| 5 | |
| 6 | --- |
| 7 | arch/mips/lantiq/xway/dma.c | 4 +++- |
| 8 | 1 file changed, 3 insertions(+), 1 deletion(-) |
| 9 | |
| 10 | diff --git a/arch/mips/lantiq/xway/dma.c b/arch/mips/lantiq/xway/dma.c |
| 11 | index b5d76d1..986fbce 100644 |
| 12 | --- a/arch/mips/lantiq/xway/dma.c |
| 13 | +++ b/arch/mips/lantiq/xway/dma.c |
| 14 | @@ -47,6 +47,7 @@ |
| 15 | #define DMA_IRQ_ACK 0x7e /* IRQ status register */ |
| 16 | #define DMA_POLL BIT(31) /* turn on channel polling */ |
| 17 | #define DMA_CLK_DIV4 BIT(6) /* polling clock divider */ |
| 18 | +#define DMA_4W_BURST BIT(2) /* 4 word burst length */ |
| 19 | #define DMA_2W_BURST BIT(1) /* 2 word burst length */ |
| 20 | #define DMA_MAX_CHANNEL 20 /* the soc has 20 channels */ |
| 21 | #define DMA_ETOP_ENDIANESS (0xf << 8) /* endianess swap etop channels */ |
| 22 | @@ -195,7 +196,8 @@ ltq_dma_init_port(int p) |
| 23 | * Tell the DMA engine to swap the endianess of data frames and |
| 24 | * drop packets if the channel arbitration fails. |
| 25 | */ |
| 26 | - ltq_dma_w32_mask(0, DMA_ETOP_ENDIANESS | DMA_PDEN, |
| 27 | + ltq_dma_w32_mask(0, (DMA_4W_BURST << 4) | (DMA_4W_BURST << 2) | |
| 28 | + DMA_ETOP_ENDIANESS | DMA_PDEN, |
| 29 | LTQ_DMA_PCTRL); |
| 30 | break; |
| 31 | |
| 32 | -- |
| 33 | 1.7.10.4 |
| 34 | |
| 35 | |
