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>
diff --git a/arch/arm/mach-davinci/dm644x.c b/arch/arm/mach-davinci/dm644x.c
index fb5449b3..d145c0c 100644
--- a/arch/arm/mach-davinci/dm644x.c
+++ b/arch/arm/mach-davinci/dm644x.c
@@ -484,17 +484,38 @@
-1
};
-static struct edma_soc_info dm644x_edma_info = {
- .n_channel = 64,
- .n_region = 4,
- .n_slot = 128,
- .n_tc = 2,
- .noevent = dma_chan_dm644x_no_event,
+static const s8
+queue_tc_mapping[][2] = {
+ /* {event queue no, TC no} */
+ {0, 0},
+ {1, 1},
+ {-1, -1},
+};
+
+static const s8
+queue_priority_mapping[][2] = {
+ /* {event queue no, Priority} */
+ {0, 3},
+ {1, 7},
+ {-1, -1},
+};
+
+static struct edma_soc_info dm644x_edma_info[] = {
+ {
+ .n_channel = 64,
+ .n_region = 4,
+ .n_slot = 128,
+ .n_tc = 2,
+ .n_cc = 1,
+ .noevent = dma_chan_dm644x_no_event,
+ .queue_tc_mapping = queue_tc_mapping,
+ .queue_priority_mapping = queue_priority_mapping,
+ },
};
static struct resource edma_resources[] = {
{
- .name = "edma_cc",
+ .name = "edma_cc0",
.start = 0x01c00000,
.end = 0x01c00000 + SZ_64K - 1,
.flags = IORESOURCE_MEM,
@@ -512,10 +533,12 @@
.flags = IORESOURCE_MEM,
},
{
+ .name = "edma0",
.start = IRQ_CCINT0,
.flags = IORESOURCE_IRQ,
},
{
+ .name = "edma0_err",
.start = IRQ_CCERRINT,
.flags = IORESOURCE_IRQ,
},
@@ -524,8 +547,8 @@
static struct platform_device dm644x_edma_device = {
.name = "edma",
- .id = -1,
- .dev.platform_data = &dm644x_edma_info,
+ .id = 0,
+ .dev.platform_data = dm644x_edma_info,
.num_resources = ARRAY_SIZE(edma_resources),
.resource = edma_resources,
};