diff options
Diffstat (limited to 'drivers/dma/intel_mid_dma.c')
| -rw-r--r-- | drivers/dma/intel_mid_dma.c | 39 |
1 files changed, 27 insertions, 12 deletions
diff --git a/drivers/dma/intel_mid_dma.c b/drivers/dma/intel_mid_dma.c index 3109bd94bc4..798f46a4590 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; @@ -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) { @@ -1060,8 +1075,8 @@ static irqreturn_t intel_mid_dma_interrupt2(int irq, void *data) * mid_setup_dma - Setup the DMA controller * @pdev: Controller PCI device structure * - * Initilize the DMA controller, channels, registers with DMA engine, - * ISR. Initilize DMA controller channels. + * Initialize the DMA controller, channels, registers with DMA engine, + * ISR. Initialize DMA controller channels. */ static int mid_setup_dma(struct pci_dev *pdev) { @@ -1217,7 +1232,7 @@ static void middma_shutdown(struct pci_dev *pdev) * @pdev: Controller PCI device structure * @id: pci device id structure * - * Initilize the PCI device, map BARs, query driver data. + * Initialize the PCI device, map BARs, query driver data. * Call setup_dma to complete contoller and chan initilzation */ static int __devinit intel_mid_dma_probe(struct pci_dev *pdev, |