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>
diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c
index 0889769..1bbb431 100644
--- a/arch/arm/plat-omap/dma.c
+++ b/arch/arm/plat-omap/dma.c
@@ -119,32 +119,41 @@
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);
}
- 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);
+ }
}
void omap_set_dma_transfer_params(int lch, int data_type, int elem_count,
@@ -234,6 +243,14 @@
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 @@
}
/*
+ * 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
diff --git a/include/asm-arm/arch-omap/dma.h b/include/asm-arm/arch-omap/dma.h
index 33cd48d..d591d05 100644
--- a/include/asm-arm/arch-omap/dma.h
+++ b/include/asm-arm/arch-omap/dma.h
@@ -331,6 +331,12 @@
OMAP_DMA_TRANSPARENT_COPY
};
+enum omap_dma_write_mode {
+ OMAP_DMA_WRITE_NON_POSTED = 0,
+ OMAP_DMA_WRITE_POSTED,
+ OMAP_DMA_WRITE_LAST_NON_POSTED
+};
+
struct omap_dma_channel_params {
int data_type; /* data type 8,16,32 */
int elem_count; /* number of elements in a frame */
@@ -356,7 +362,7 @@
};
-extern void omap_set_dma_priority(int dst_port, int priority);
+extern void omap_set_dma_priority(int lch, int dst_port, int priority);
extern int omap_request_dma(int dev_id, const char *dev_name,
void (* callback)(int lch, u16 ch_status, void *data),
void *data, int *dma_ch);
@@ -371,6 +377,7 @@
int dma_trigger, int src_or_dst_synch);
extern void omap_set_dma_color_mode(int lch, enum omap_dma_color_mode mode,
u32 color);
+extern void omap_set_dma_write_mode(int lch, enum omap_dma_write_mode mode);
extern void omap_set_dma_src_params(int lch, int src_port, int src_amode,
unsigned long src_start,
@@ -394,6 +401,9 @@
extern void omap_dma_link_lch (int lch_head, int lch_queue);
extern void omap_dma_unlink_lch (int lch_head, int lch_queue);
+extern int omap_set_dma_callback(int lch,
+ void (* callback)(int lch, u16 ch_status, void *data),
+ void *data);
extern dma_addr_t omap_get_dma_src_pos(int lch);
extern dma_addr_t omap_get_dma_dst_pos(int lch);
extern int omap_get_dma_src_addr_counter(int lch);
