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| author | Nicolin Chen <b42378@freescale.com> | 2013-11-13 22:55:25 +0800 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2013-12-16 09:18:48 +0530 |
| commit | 1a895578d4e50577bb6aa79bd194b502f09dd768 (patch) | |
| tree | 9f8ae02613713c5242f35eb975e621e5b848be3f | |
| parent | cd72b8462a2ebbf9524e726c65c2770f0bf70d22 (diff) | |
| download | op-kernel-dev-1a895578d4e50577bb6aa79bd194b502f09dd768.zip op-kernel-dev-1a895578d4e50577bb6aa79bd194b502f09dd768.tar.gz | |
dma: imx-sdma: Add new dma type for ssi dual fifo script
This patch adds a new DMA_TYPE for SSI dual FIFO script, included
in SDMA firmware version 2. This script would allow SSI use dual
fifo mode to transimit/receive data without occasional hardware
underrun/overrun.
Signed-off-by: Nicolin Chen <b42378@freescale.com>
Acked-by: Kumar Gala <galak@codeaurora.org>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| -rw-r--r-- | Documentation/devicetree/bindings/dma/fsl-imx-sdma.txt | 1 | ||||
| -rw-r--r-- | drivers/dma/imx-sdma.c | 4 | ||||
| -rw-r--r-- | include/linux/platform_data/dma-imx.h | 1 |
3 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/dma/fsl-imx-sdma.txt b/Documentation/devicetree/bindings/dma/fsl-imx-sdma.txt index 4fa814d..68b83ec 100644 --- a/Documentation/devicetree/bindings/dma/fsl-imx-sdma.txt +++ b/Documentation/devicetree/bindings/dma/fsl-imx-sdma.txt @@ -42,6 +42,7 @@ The full ID of peripheral types can be found below. 19 IPU Memory 20 ASRC 21 ESAI + 22 SSI Dual FIFO (needs firmware ver >= 2) The third cell specifies the transfer priority as below. diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c index f769c73..1522476 100644 --- a/drivers/dma/imx-sdma.c +++ b/drivers/dma/imx-sdma.c @@ -725,6 +725,10 @@ static void sdma_get_pc(struct sdma_channel *sdmac, per_2_emi = sdma->script_addrs->app_2_mcu_addr; emi_2_per = sdma->script_addrs->mcu_2_app_addr; break; + case IMX_DMATYPE_SSI_DUAL: + per_2_emi = sdma->script_addrs->ssish_2_mcu_addr; + emi_2_per = sdma->script_addrs->mcu_2_ssish_addr; + break; case IMX_DMATYPE_SSI_SP: case IMX_DMATYPE_MMC: case IMX_DMATYPE_SDHC: diff --git a/include/linux/platform_data/dma-imx.h b/include/linux/platform_data/dma-imx.h index beac6b8..bcbc6c3 100644 --- a/include/linux/platform_data/dma-imx.h +++ b/include/linux/platform_data/dma-imx.h @@ -39,6 +39,7 @@ enum sdma_peripheral_type { IMX_DMATYPE_IPU_MEMORY, /* IPU Memory */ IMX_DMATYPE_ASRC, /* ASRC */ IMX_DMATYPE_ESAI, /* ESAI */ + IMX_DMATYPE_SSI_DUAL, /* SSI Dual FIFO */ }; enum imx_dma_prio { |
