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authorSudhakar Rajashekhara <sudhakar.raj@ti.com>2009-05-21 07:41:35 -0400
committerKevin Hilman <khilman@deeprootsystems.com>2009-08-26 10:56:56 +0300
commit60902a2cb12c3c1682ee7a04ad7448ec16dc0c29 (patch)
treeba754bff7fadd7106dc9f8549136a514177d0fd1 /arch/arm/mach-davinci/dm646x.c
parent4c5adde7943b982d22a7bf711654fbb5cb810667 (diff)
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davinci: EDMA: multiple CCs, channel mapping and API changes
- restructure to support multiple channel controllers by using additional struct resources for each CC - interface changes visible to EDMA clients Introduce macros to build IDs from controller and channel number, and to extract them. Modify the edma_alloc_slot function to take an extra argument for the controller. Also update ASoC drivers to use API. ASoC changes Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> - Move queue related mappings to dm<soc>.c EDMA in DM355 and DM644x has two transfer controllers while DM646x has four transfer controllers. Moving the queue to tc mapping and queue priority mapping to dm<soc>.c will be helpful to probe these mappings from platform device so that the machine_is_* testing will be avoided. - add channel mapping logic Channel mapping logic is introduced in dm646x EDMA. This implies that there is no fixed association for a channel number to a parameter entry number. In other words, using the DMA channel mapping registers (DCHMAPn), a PaRAM entry can be mapped to any channel. While in the case of dm644x and dm355 there is a fixed mapping between the EDMA channel and Param entry number. Signed-off-by: Naresh Medisetty <naresh@ti.com> Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com> Reviewed-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/mach-davinci/dm646x.c')
-rw-r--r--arch/arm/mach-davinci/dm646x.c46
1 files changed, 37 insertions, 9 deletions
diff --git a/arch/arm/mach-davinci/dm646x.c b/arch/arm/mach-davinci/dm646x.c
index 334f0711e0f..e2410738327 100644
--- a/arch/arm/mach-davinci/dm646x.c
+++ b/arch/arm/mach-davinci/dm646x.c
@@ -451,17 +451,43 @@ static const s8 dma_chan_dm646x_no_event[] = {
-1
};
-static struct edma_soc_info dm646x_edma_info = {
- .n_channel = 64,
- .n_region = 6, /* 0-1, 4-7 */
- .n_slot = 512,
- .n_tc = 4,
- .noevent = dma_chan_dm646x_no_event,
+/* Four Transfer Controllers on DM646x */
+static const s8
+dm646x_queue_tc_mapping[][2] = {
+ /* {event queue no, TC no} */
+ {0, 0},
+ {1, 1},
+ {2, 2},
+ {3, 3},
+ {-1, -1},
+};
+
+static const s8
+dm646x_queue_priority_mapping[][2] = {
+ /* {event queue no, Priority} */
+ {0, 4},
+ {1, 0},
+ {2, 5},
+ {3, 1},
+ {-1, -1},
+};
+
+static struct edma_soc_info dm646x_edma_info[] = {
+ {
+ .n_channel = 64,
+ .n_region = 6, /* 0-1, 4-7 */
+ .n_slot = 512,
+ .n_tc = 4,
+ .n_cc = 1,
+ .noevent = dma_chan_dm646x_no_event,
+ .queue_tc_mapping = dm646x_queue_tc_mapping,
+ .queue_priority_mapping = dm646x_queue_priority_mapping,
+ },
};
static struct resource edma_resources[] = {
{
- .name = "edma_cc",
+ .name = "edma_cc0",
.start = 0x01c00000,
.end = 0x01c00000 + SZ_64K - 1,
.flags = IORESOURCE_MEM,
@@ -491,10 +517,12 @@ static struct resource edma_resources[] = {
.flags = IORESOURCE_MEM,
},
{
+ .name = "edma0",
.start = IRQ_CCINT0,
.flags = IORESOURCE_IRQ,
},
{
+ .name = "edma0_err",
.start = IRQ_CCERRINT,
.flags = IORESOURCE_IRQ,
},
@@ -503,8 +531,8 @@ static struct resource edma_resources[] = {
static struct platform_device dm646x_edma_device = {
.name = "edma",
- .id = -1,
- .dev.platform_data = &dm646x_edma_info,
+ .id = 0,
+ .dev.platform_data = dm646x_edma_info,
.num_resources = ARRAY_SIZE(edma_resources),
.resource = edma_resources,
};