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>

diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index d5829c7..e7f9d1d 100644 (file)
--- 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;
 }