diff options
Diffstat (limited to 'drivers/dma/mpc512x_dma.c')
| -rw-r--r-- | drivers/dma/mpc512x_dma.c | 38 |
1 files changed, 24 insertions, 14 deletions
diff --git a/drivers/dma/mpc512x_dma.c b/drivers/dma/mpc512x_dma.c index aae76fb39adc..3a9104a1041c 100644 --- a/drivers/dma/mpc512x_dma.c +++ b/drivers/dma/mpc512x_dma.c @@ -760,21 +760,31 @@ mpc_dma_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, tcd->ssize = MPC_DMA_TSIZE_4; tcd->dsize = MPC_DMA_TSIZE_4; - len = sg_dma_len(sg); - tcd->nbytes = tcd_nunits * 4; - if (!IS_ALIGNED(len, tcd->nbytes)) - goto err_prep; - - iter = len / tcd->nbytes; - if (iter >= 1 << 15) { - /* len is too big */ - goto err_prep; + if (mdma->is_mpc8308) { + tcd->nbytes = sg_dma_len(sg); + if (!IS_ALIGNED(tcd->nbytes, 4)) + goto err_prep; + + /* No major loops for MPC8303 */ + tcd->biter = 1; + tcd->citer = 1; + } else { + len = sg_dma_len(sg); + tcd->nbytes = tcd_nunits * 4; + if (!IS_ALIGNED(len, tcd->nbytes)) + goto err_prep; + + iter = len / tcd->nbytes; + if (iter >= 1 << 15) { + /* len is too big */ + goto err_prep; + } + /* citer_linkch contains the high bits of iter */ + tcd->biter = iter & 0x1ff; + tcd->biter_linkch = iter >> 9; + tcd->citer = tcd->biter; + tcd->citer_linkch = tcd->biter_linkch; } - /* citer_linkch contains the high bits of iter */ - tcd->biter = iter & 0x1ff; - tcd->biter_linkch = iter >> 9; - tcd->citer = tcd->biter; - tcd->citer_linkch = tcd->biter_linkch; tcd->e_sg = 0; tcd->d_req = 1; |