DMA: PL330: Support DMA_SLAVE_CONFIG command

Signed-off-by: Boojin Kim <boojin.kim@samsung.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

1 files changed, 37 insertions, 12 deletions

diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index d5829c734fad..e7f9d1d3d81a 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -73,6 +73,7 @@ struct dma_pl330_chan {
 
         /* For D-to-M and M-to-D channels */
         int burst_sz; /* the peripheral fifo width */
+        int burst_len; /* the number of burst */
         dma_addr_t fifo_addr;
 };
 
@@ -263,23 +264,47 @@ static int pl330_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, unsigned
         struct dma_pl330_chan *pch = to_pchan(chan);
         struct dma_pl330_desc *desc;
         unsigned long flags;
+        struct dma_pl330_dmac *pdmac = pch->dmac;
+        struct dma_slave_config *slave_config;
 
-        /* Only supports DMA_TERMINATE_ALL */
-        if (cmd != DMA_TERMINATE_ALL)
-                return -ENXIO;
+        switch (cmd) {
+        case DMA_TERMINATE_ALL:
+                spin_lock_irqsave(&pch->lock, flags);
 
-        spin_lock_irqsave(&pch->lock, flags);
+                /* FLUSH the PL330 Channel thread */
+                pl330_chan_ctrl(pch->pl330_chid, PL330_OP_FLUSH);
 
-        /* FLUSH the PL330 Channel thread */
-        pl330_chan_ctrl(pch->pl330_chid, PL330_OP_FLUSH);
-
-        /* Mark all desc done */
-        list_for_each_entry(desc, &pch->work_list, node)
-                desc->status = DONE;
+                /* Mark all desc done */
+                list_for_each_entry(desc, &pch->work_list, node)
+                        desc->status = DONE;
 
-        spin_unlock_irqrestore(&pch->lock, flags);
+                spin_unlock_irqrestore(&pch->lock, flags);
 
-        pl330_tasklet((unsigned long) pch);
+                pl330_tasklet((unsigned long) pch);
+                break;
+        case DMA_SLAVE_CONFIG:
+                slave_config = (struct dma_slave_config *)arg;
+
+                if (slave_config->direction == DMA_TO_DEVICE) {
+                        if (slave_config->dst_addr)
+                                pch->fifo_addr = slave_config->dst_addr;
+                        if (slave_config->dst_addr_width)
+                                pch->burst_sz = __ffs(slave_config->dst_addr_width);
+                        if (slave_config->dst_maxburst)
+                                pch->burst_len = slave_config->dst_maxburst;
+                } else if (slave_config->direction == DMA_FROM_DEVICE) {
+                        if (slave_config->src_addr)
+                                pch->fifo_addr = slave_config->src_addr;
+                        if (slave_config->src_addr_width)
+                                pch->burst_sz = __ffs(slave_config->src_addr_width);
+                        if (slave_config->src_maxburst)
+                                pch->burst_len = slave_config->src_maxburst;
+                }
+                break;
+        default:
+                dev_err(pch->dmac->pif.dev, "Not supported command.\n");
+                return -ENXIO;
+        }
 
         return 0;
 }