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dmaengine: cppi41: Add support of DA8xx to CPPI 4.1

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The DA8xx has a CPPI 4.1 DMA controller.
This is add the glue layer required to make it work on DA8xx.

Signed-off-by: Alexandre Bailon <abailon@baylibre.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Alexandre Bailon 2017-01-30 18:49:20 +01:00 committed by Vinod Koul
parent d567206e47
commit e3fa49acf0
2 changed files with 26 additions and 3 deletions
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6
drivers/dma/Kconfig
View file

@ -514,12 +514,12 @@ config TIMB_DMA
Enable support for the Timberdale FPGA DMA engine.
config TI_CPPI41
tristate "AM33xx CPPI41 DMA support"
depends on ARCH_OMAP
tristate "CPPI 4.1 DMA support"
depends on (ARCH_OMAP || ARCH_DAVINCI_DA8XX)
select DMA_ENGINE
help
The Communications Port Programming Interface (CPPI) 4.1 DMA engine
is currently used by the USB driver on AM335x platforms.
is currently used by the USB driver on AM335x and DA8xx platforms.
config TI_DMA_CROSSBAR
bool

23
drivers/dma/cppi41.c
View file

@ -223,6 +223,20 @@ static const struct chan_queues am335x_usb_queues_rx[] = {
[29] = { .submit = 30, .complete = 155},
};
static const struct chan_queues da8xx_usb_queues_tx[] = {
[0] = { .submit = 16, .complete = 24},
[1] = { .submit = 18, .complete = 24},
[2] = { .submit = 20, .complete = 24},
[3] = { .submit = 22, .complete = 24},
};
static const struct chan_queues da8xx_usb_queues_rx[] = {
[0] = { .submit = 1, .complete = 26},
[1] = { .submit = 3, .complete = 26},
[2] = { .submit = 5, .complete = 26},
[3] = { .submit = 7, .complete = 26},
};
struct cppi_glue_infos {
const struct chan_queues *queues_rx;
const struct chan_queues *queues_tx;
@ -971,8 +985,17 @@ static const struct cppi_glue_infos am335x_usb_infos = {
.qmgr_num_pend = 5,
};
static const struct cppi_glue_infos da8xx_usb_infos = {
.queues_rx = da8xx_usb_queues_rx,
.queues_tx = da8xx_usb_queues_tx,
.td_queue = { .submit = 31, .complete = 0 },
.first_completion_queue = 24,
.qmgr_num_pend = 2,
};
static const struct of_device_id cppi41_dma_ids[] = {
{ .compatible = "ti,am3359-cppi41", .data = &am335x_usb_infos},
{ .compatible = "ti,da830-cppi41", .data = &da8xx_usb_infos},
{},
};
MODULE_DEVICE_TABLE(of, cppi41_dma_ids);