diff options
Diffstat (limited to 'drivers/dma/intel_mid_dma.c')
| -rw-r--r-- | drivers/dma/intel_mid_dma.c | 41 |
1 files changed, 28 insertions, 13 deletions
diff --git a/drivers/dma/intel_mid_dma.c b/drivers/dma/intel_mid_dma.c index 78266382797e..3d4ec38b9b62 100644 --- a/drivers/dma/intel_mid_dma.c +++ b/drivers/dma/intel_mid_dma.c @@ -664,11 +664,20 @@ static struct dma_async_tx_descriptor *intel_mid_dma_prep_memcpy( /*calculate CTL_LO*/ ctl_lo.ctl_lo = 0; ctl_lo.ctlx.int_en = 1; - ctl_lo.ctlx.dst_tr_width = mids->dma_slave.dst_addr_width; - ctl_lo.ctlx.src_tr_width = mids->dma_slave.src_addr_width; ctl_lo.ctlx.dst_msize = mids->dma_slave.src_maxburst; ctl_lo.ctlx.src_msize = mids->dma_slave.dst_maxburst; + /* + * Here we need some translation from "enum dma_slave_buswidth" + * to the format for our dma controller + * standard intel_mid_dmac's format + * 1 Byte 0b000 + * 2 Bytes 0b001 + * 4 Bytes 0b010 + */ + ctl_lo.ctlx.dst_tr_width = mids->dma_slave.dst_addr_width / 2; + ctl_lo.ctlx.src_tr_width = mids->dma_slave.src_addr_width / 2; + if (mids->cfg_mode == LNW_DMA_MEM_TO_MEM) { ctl_lo.ctlx.tt_fc = 0; ctl_lo.ctlx.sinc = 0; @@ -746,8 +755,18 @@ static struct dma_async_tx_descriptor *intel_mid_dma_prep_slave_sg( BUG_ON(!mids); if (!midc->dma->pimr_mask) { - pr_debug("MDMA: SG list is not supported by this controller\n"); - return NULL; + /* We can still handle sg list with only one item */ + if (sg_len == 1) { + txd = intel_mid_dma_prep_memcpy(chan, + mids->dma_slave.dst_addr, + mids->dma_slave.src_addr, + sgl->length, + flags); + return txd; + } else { + pr_warn("MDMA: SG list is not supported by this controller\n"); + return NULL; + } } pr_debug("MDMA: SG Length = %d, direction = %d, Flags = %#lx\n", @@ -758,6 +777,7 @@ static struct dma_async_tx_descriptor *intel_mid_dma_prep_slave_sg( pr_err("MDMA: Prep memcpy failed\n"); return NULL; } + desc = to_intel_mid_dma_desc(txd); desc->dirn = direction; ctl_lo.ctl_lo = desc->ctl_lo; @@ -891,8 +911,8 @@ static int intel_mid_dma_alloc_chan_resources(struct dma_chan *chan) /** * midc_handle_error - Handle DMA txn error - * @mid: controller where error occured - * @midc: chan where error occured + * @mid: controller where error occurred + * @midc: chan where error occurred * * Scan the descriptor for error */ @@ -1021,11 +1041,6 @@ static irqreturn_t intel_mid_dma_interrupt(int irq, void *data) /*DMA Interrupt*/ pr_debug("MDMA:Got an interrupt on irq %d\n", irq); - if (!mid) { - pr_err("ERR_MDMA:null pointer mid\n"); - return -EINVAL; - } - pr_debug("MDMA: Status %x, Mask %x\n", tfr_status, mid->intr_mask); tfr_status &= mid->intr_mask; if (tfr_status) { @@ -1084,7 +1099,7 @@ static int mid_setup_dma(struct pci_dev *pdev) dma->mask_reg = ioremap(LNW_PERIPHRAL_MASK_BASE, LNW_PERIPHRAL_MASK_SIZE); if (dma->mask_reg == NULL) { - pr_err("ERR_MDMA:Cant map periphral intr space !!\n"); + pr_err("ERR_MDMA:Can't map periphral intr space !!\n"); return -ENOMEM; } } else @@ -1358,7 +1373,7 @@ int dma_resume(struct pci_dev *pci) pci_restore_state(pci); ret = pci_enable_device(pci); if (ret) { - pr_err("MDMA: device cant be enabled for %x\n", pci->device); + pr_err("MDMA: device can't be enabled for %x\n", pci->device); return ret; } device->state = RUNNING; |