From 60902a2cb12c3c1682ee7a04ad7448ec16dc0c29 Mon Sep 17 00:00:00 2001 From: Sudhakar Rajashekhara Date: Thu, 21 May 2009 07:41:35 -0400 Subject: 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 - Move queue related mappings to dm.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.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 Signed-off-by: Sudhakar Rajashekhara Reviewed-by: David Brownell Signed-off-by: Kevin Hilman --- arch/arm/mach-davinci/dm646x.c | 46 +++++++++++++++++++++++++++++++++--------- 1 file changed, 37 insertions(+), 9 deletions(-) (limited to 'arch/arm/mach-davinci/dm646x.c') diff --git a/arch/arm/mach-davinci/dm646x.c b/arch/arm/mach-davinci/dm646x.c index 334f0711e0f5..e2410738327c 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, }; -- cgit v1.2.2