redonkable/remarkable-linux
redonkable/remarkable-linux
1
0
Fork 0
Code Releases Activity

dma: mpc512x: reorder mpc8308 specific instructions

Browse source 
Concentrate the specific code for MPC8308 in the 'if' branch
and handle MPC512x in the 'else' branch.
This modification only reorders instructions but doesn't change behaviour.

Signed-off-by: Alexander Popov <a13xp0p0v88@gmail.com>
Acked-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Alexander Popov 2014-04-23 17:53:23 +04:00 committed by Vinod Koul
parent 2a5ecb7918
commit 78a4f0367a
1 changed files with 25 additions and 17 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

42
drivers/dma/mpc512x_dma.c
View file

@ -52,9 +52,17 @@
#define MPC_DMA_DESCRIPTORS 64
/* Macro definitions */
#define MPC_DMA_CHANNELS 64
#define MPC_DMA_TCD_OFFSET 0x1000
/*
* Maximum channel counts for individual hardware variants
* and the maximum channel count over all supported controllers,
* used for data structure size
*/
#define MPC8308_DMACHAN_MAX 16
#define MPC512x_DMACHAN_MAX 64
#define MPC_DMA_CHANNELS 64
/* Arbitration mode of group and channel */
#define MPC_DMA_DMACR_EDCG (1 << 31)
#define MPC_DMA_DMACR_ERGA (1 << 3)
@ -710,10 +718,10 @@ static int mpc_dma_probe(struct platform_device *op)
dma = &mdma->dma;
dma->dev = dev;
if (!mdma->is_mpc8308)
dma->chancnt = MPC_DMA_CHANNELS;
if (mdma->is_mpc8308)
dma->chancnt = MPC8308_DMACHAN_MAX;
else
dma->chancnt = 16; /* MPC8308 DMA has only 16 channels */
dma->chancnt = MPC512x_DMACHAN_MAX;
dma->device_alloc_chan_resources = mpc_dma_alloc_chan_resources;
dma->device_free_chan_resources = mpc_dma_free_chan_resources;
dma->device_issue_pending = mpc_dma_issue_pending;
@ -747,7 +755,19 @@ static int mpc_dma_probe(struct platform_device *op)
* - Round-robin group arbitration,
* - Round-robin channel arbitration.
*/
if (!mdma->is_mpc8308) {
if (mdma->is_mpc8308) {
/* MPC8308 has 16 channels and lacks some registers */
out_be32(&mdma->regs->dmacr, MPC_DMA_DMACR_ERCA);
/* enable snooping */
out_be32(&mdma->regs->dmagpor, MPC_DMA_DMAGPOR_SNOOP_ENABLE);
/* Disable error interrupts */
out_be32(&mdma->regs->dmaeeil, 0);
/* Clear interrupts status */
out_be32(&mdma->regs->dmaintl, 0xFFFF);
out_be32(&mdma->regs->dmaerrl, 0xFFFF);
} else {
out_be32(&mdma->regs->dmacr, MPC_DMA_DMACR_EDCG |
MPC_DMA_DMACR_ERGA | MPC_DMA_DMACR_ERCA);
@ -768,18 +788,6 @@ static int mpc_dma_probe(struct platform_device *op)
/* Route interrupts to IPIC */
out_be32(&mdma->regs->dmaihsa, 0);
out_be32(&mdma->regs->dmailsa, 0);
} else {
/* MPC8308 has 16 channels and lacks some registers */
out_be32(&mdma->regs->dmacr, MPC_DMA_DMACR_ERCA);
/* enable snooping */
out_be32(&mdma->regs->dmagpor, MPC_DMA_DMAGPOR_SNOOP_ENABLE);
/* Disable error interrupts */
out_be32(&mdma->regs->dmaeeil, 0);
/* Clear interrupts status */
out_be32(&mdma->regs->dmaintl, 0xFFFF);
out_be32(&mdma->regs->dmaerrl, 0xFFFF);
}
/* Register DMA engine */