diff options
Diffstat (limited to 'drivers/dma/fsldma.c')
| -rw-r--r-- | drivers/dma/fsldma.c | 58 |
1 files changed, 44 insertions, 14 deletions
diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c index cc9a68158d9..ad2f938597e 100644 --- a/drivers/dma/fsldma.c +++ b/drivers/dma/fsldma.c @@ -57,12 +57,12 @@ static void dma_init(struct fsl_dma_chan *fsl_chan) } -static void set_sr(struct fsl_dma_chan *fsl_chan, dma_addr_t val) +static void set_sr(struct fsl_dma_chan *fsl_chan, u32 val) { DMA_OUT(fsl_chan, &fsl_chan->reg_base->sr, val, 32); } -static dma_addr_t get_sr(struct fsl_dma_chan *fsl_chan) +static u32 get_sr(struct fsl_dma_chan *fsl_chan) { return DMA_IN(fsl_chan, &fsl_chan->reg_base->sr, 32); } @@ -406,6 +406,32 @@ static void fsl_dma_free_chan_resources(struct dma_chan *chan) dma_pool_destroy(fsl_chan->desc_pool); } +static struct dma_async_tx_descriptor * +fsl_dma_prep_interrupt(struct dma_chan *chan) +{ + struct fsl_dma_chan *fsl_chan; + struct fsl_desc_sw *new; + + if (!chan) + return NULL; + + fsl_chan = to_fsl_chan(chan); + + new = fsl_dma_alloc_descriptor(fsl_chan); + if (!new) { + dev_err(fsl_chan->dev, "No free memory for link descriptor\n"); + return NULL; + } + + new->async_tx.cookie = -EBUSY; + new->async_tx.ack = 0; + + /* Set End-of-link to the last link descriptor of new list*/ + set_ld_eol(fsl_chan, new); + + return &new->async_tx; +} + static struct dma_async_tx_descriptor *fsl_dma_prep_memcpy( struct dma_chan *chan, dma_addr_t dma_dest, dma_addr_t dma_src, size_t len, unsigned long flags) @@ -436,7 +462,7 @@ static struct dma_async_tx_descriptor *fsl_dma_prep_memcpy( dev_dbg(fsl_chan->dev, "new link desc alloc %p\n", new); #endif - copy = min(len, FSL_DMA_BCR_MAX_CNT); + copy = min(len, (size_t)FSL_DMA_BCR_MAX_CNT); set_desc_cnt(fsl_chan, &new->hw, copy); set_desc_src(fsl_chan, &new->hw, dma_src); @@ -513,7 +539,6 @@ static void fsl_chan_ld_cleanup(struct fsl_dma_chan *fsl_chan) spin_lock_irqsave(&fsl_chan->desc_lock, flags); - fsl_dma_update_completed_cookie(fsl_chan); dev_dbg(fsl_chan->dev, "chan completed_cookie = %d\n", fsl_chan->completed_cookie); list_for_each_entry_safe(desc, _desc, &fsl_chan->ld_queue, node) { @@ -581,8 +606,8 @@ static void fsl_chan_xfer_ld_queue(struct fsl_dma_chan *fsl_chan) if (ld_node != &fsl_chan->ld_queue) { /* Get the ld start address from ld_queue */ next_dest_addr = to_fsl_desc(ld_node)->async_tx.phys; - dev_dbg(fsl_chan->dev, "xfer LDs staring from 0x%016llx\n", - (u64)next_dest_addr); + dev_dbg(fsl_chan->dev, "xfer LDs staring from %p\n", + (void *)next_dest_addr); set_cdar(fsl_chan, next_dest_addr); dma_start(fsl_chan); } else { @@ -662,7 +687,7 @@ static enum dma_status fsl_dma_is_complete(struct dma_chan *chan, static irqreturn_t fsl_dma_chan_do_interrupt(int irq, void *data) { struct fsl_dma_chan *fsl_chan = (struct fsl_dma_chan *)data; - dma_addr_t stat; + u32 stat; stat = get_sr(fsl_chan); dev_dbg(fsl_chan->dev, "event: channel %d, stat = 0x%x\n", @@ -681,10 +706,10 @@ static irqreturn_t fsl_dma_chan_do_interrupt(int irq, void *data) */ if (stat & FSL_DMA_SR_EOSI) { dev_dbg(fsl_chan->dev, "event: End-of-segments INT\n"); - dev_dbg(fsl_chan->dev, "event: clndar 0x%016llx, " - "nlndar 0x%016llx\n", (u64)get_cdar(fsl_chan), - (u64)get_ndar(fsl_chan)); + dev_dbg(fsl_chan->dev, "event: clndar %p, nlndar %p\n", + (void *)get_cdar(fsl_chan), (void *)get_ndar(fsl_chan)); stat &= ~FSL_DMA_SR_EOSI; + fsl_dma_update_completed_cookie(fsl_chan); } /* If it current transfer is the end-of-transfer, @@ -726,12 +751,15 @@ static void dma_do_tasklet(unsigned long data) fsl_chan_ld_cleanup(fsl_chan); } +#ifdef FSL_DMA_CALLBACKTEST static void fsl_dma_callback_test(struct fsl_dma_chan *fsl_chan) { if (fsl_chan) dev_info(fsl_chan->dev, "selftest: callback is ok!\n"); } +#endif +#ifdef CONFIG_FSL_DMA_SELFTEST static int fsl_dma_self_test(struct fsl_dma_chan *fsl_chan) { struct dma_chan *chan; @@ -837,9 +865,9 @@ static int fsl_dma_self_test(struct fsl_dma_chan *fsl_chan) if (err) { for (i = 0; (*(src + i) == *(dest + i)) && (i < test_size); i++); - dev_err(fsl_chan->dev, "selftest: Test failed, data %d/%d is " + dev_err(fsl_chan->dev, "selftest: Test failed, data %d/%ld is " "error! src 0x%x, dest 0x%x\n", - i, test_size, *(src + i), *(dest + i)); + i, (long)test_size, *(src + i), *(dest + i)); } free_resources: @@ -848,6 +876,7 @@ out: kfree(src); return err; } +#endif static int __devinit of_fsl_dma_chan_probe(struct of_device *dev, const struct of_device_id *match) @@ -1008,8 +1037,8 @@ static int __devinit of_fsl_dma_probe(struct of_device *dev, } dev_info(&dev->dev, "Probe the Freescale DMA driver for %s " - "controller at 0x%08x...\n", - match->compatible, fdev->reg.start); + "controller at %p...\n", + match->compatible, (void *)fdev->reg.start); fdev->reg_base = ioremap(fdev->reg.start, fdev->reg.end - fdev->reg.start + 1); @@ -1017,6 +1046,7 @@ static int __devinit of_fsl_dma_probe(struct of_device *dev, dma_cap_set(DMA_INTERRUPT, fdev->common.cap_mask); fdev->common.device_alloc_chan_resources = fsl_dma_alloc_chan_resources; fdev->common.device_free_chan_resources = fsl_dma_free_chan_resources; + fdev->common.device_prep_dma_interrupt = fsl_dma_prep_interrupt; fdev->common.device_prep_dma_memcpy = fsl_dma_prep_memcpy; fdev->common.device_is_tx_complete = fsl_dma_is_complete; fdev->common.device_issue_pending = fsl_dma_memcpy_issue_pending; |