ARM: OMAP: Sync DMA with linux-omap tree

This patch syncs OMAP DMA code with linux-omap tree.
Mostly allow changing DMA callback function and set
OMAP2 specific transfer mode.

Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 64 insertions, 21 deletions

diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c
index 0889769cb225..1bbb431843ce 100644
--- a/arch/arm/plat-omap/dma.c
+++ b/arch/arm/plat-omap/dma.c
@@ -119,32 +119,41 @@ static void clear_lch_regs(int lch)
                 omap_writew(0, lch_base + i);
 }
 
-void omap_set_dma_priority(int dst_port, int priority)
+void omap_set_dma_priority(int lch, int dst_port, int priority)
 {
         unsigned long reg;
         u32 l;
 
-        switch (dst_port) {
-        case OMAP_DMA_PORT_OCP_T1:      /* FFFECC00 */
-                reg = OMAP_TC_OCPT1_PRIOR;
-                break;
-        case OMAP_DMA_PORT_OCP_T2:      /* FFFECCD0 */
-                reg = OMAP_TC_OCPT2_PRIOR;
-                break;
-        case OMAP_DMA_PORT_EMIFF:       /* FFFECC08 */
-                reg = OMAP_TC_EMIFF_PRIOR;
-                break;
-        case OMAP_DMA_PORT_EMIFS:       /* FFFECC04 */
-                reg = OMAP_TC_EMIFS_PRIOR;
-                break;
-        default:
-                BUG();
-                return;
+        if (cpu_class_is_omap1()) {
+                switch (dst_port) {
+                case OMAP_DMA_PORT_OCP_T1:      /* FFFECC00 */
+                        reg = OMAP_TC_OCPT1_PRIOR;
+                        break;
+                case OMAP_DMA_PORT_OCP_T2:      /* FFFECCD0 */
+                        reg = OMAP_TC_OCPT2_PRIOR;
+                        break;
+                case OMAP_DMA_PORT_EMIFF:       /* FFFECC08 */
+                        reg = OMAP_TC_EMIFF_PRIOR;
+                        break;
+                case OMAP_DMA_PORT_EMIFS:       /* FFFECC04 */
+                        reg = OMAP_TC_EMIFS_PRIOR;
+                        break;
+                default:
+                        BUG();
+                        return;
+                }
+                l = omap_readl(reg);
+                l &= ~(0xf << 8);
+                l |= (priority & 0xf) << 8;
+                omap_writel(l, reg);
+        }
+
+        if (cpu_is_omap24xx()) {
+                if (priority)
+                        OMAP_DMA_CCR_REG(lch) |= (1 << 6);
+                else
+                        OMAP_DMA_CCR_REG(lch) &= ~(1 << 6);
         }
-        l = omap_readl(reg);
-        l &= ~(0xf << 8);
-        l |= (priority & 0xf) << 8;
-        omap_writel(l, reg);
 }
 
 void omap_set_dma_transfer_params(int lch, int data_type, int elem_count,
@@ -234,6 +243,14 @@ void omap_set_dma_color_mode(int lch, enum omap_dma_color_mode mode, u32 color)
         OMAP1_DMA_LCH_CTRL_REG(lch) = w;
 }
 
+void omap_set_dma_write_mode(int lch, enum omap_dma_write_mode mode)
+{
+        if (cpu_is_omap24xx()) {
+                OMAP_DMA_CSDP_REG(lch) &= ~(0x3 << 16);
+                OMAP_DMA_CSDP_REG(lch) |= (mode << 16);
+        }
+}
+
 /* Note that src_port is only for omap1 */
 void omap_set_dma_src_params(int lch, int src_port, int src_amode,
                              unsigned long src_start,
@@ -698,6 +715,32 @@ void omap_stop_dma(int lch)
 }
 
 /*
+ * Allows changing the DMA callback function or data. This may be needed if
+ * the driver shares a single DMA channel for multiple dma triggers.
+ */
+int omap_set_dma_callback(int lch,
+                          void (* callback)(int lch, u16 ch_status, void *data),
+                          void *data)
+{
+        unsigned long flags;
+
+        if (lch < 0)
+                return -ENODEV;
+
+        spin_lock_irqsave(&dma_chan_lock, flags);
+        if (dma_chan[lch].dev_id == -1) {
+                printk(KERN_ERR "DMA callback for not set for free channel\n");
+                spin_unlock_irqrestore(&dma_chan_lock, flags);
+                return -EINVAL;
+        }
+        dma_chan[lch].callback = callback;
+        dma_chan[lch].data = data;
+        spin_unlock_irqrestore(&dma_chan_lock, flags);
+
+        return 0;
+}
+
+/*
  * Returns current physical source address for the given DMA channel.
  * If the channel is running the caller must disable interrupts prior calling
  * this function and process the returned value before re-enabling interrupt to