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authorNicolin Chen <Guangyu.Chen@freescale.com>2014-01-08 16:45:56 +0800
committerVinod Koul <vinod.koul@intel.com>2014-01-13 14:52:04 +0530
commit70dabaede806e12881a527ef9460b293ec15af59 (patch)
treeb7286fed3e60c6a785a24e5ef9a9eb41497ffc1b /drivers/dma
parente5b2886145bb0c3d7949952bd618529f8bea4cf7 (diff)
downloadlinux-70dabaede806e12881a527ef9460b293ec15af59.tar.bz2
dma: imx-sdma: Assign a default script number for ROM firmware cases
i.MX series have inner firmware in its ROM code: when SDMA isn't provided any firmware from Kernel or rootfs, the default inner ROM firmware will be activated. However the current driver doesn't assign any script number to this situation, and those platform running in this case would be broken. Thus this patch adds a default script number when no external firmware being loaded so that people would continue to be able to use basic scripts to run their platform without any firmware. Reported-by: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: Nicolin Chen <Guangyu.Chen@freescale.com> Tested-by: Fabio Estevam <fabio.estevam@freescale.com> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/imx-sdma.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 152247675feb..4e7918339b12 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -1252,6 +1252,10 @@ static void sdma_add_scripts(struct sdma_engine *sdma,
s32 *saddr_arr = (u32 *)sdma->script_addrs;
int i;
+ /* use the default firmware in ROM if missing external firmware */
+ if (!sdma->script_number)
+ sdma->script_number = SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1;
+
for (i = 0; i < sdma->script_number; i++)
if (addr_arr[i] > 0)
saddr_arr[i] = addr_arr[i];