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| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2013-06-20 12:13:04 +0200 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2013-08-09 16:40:16 +0200 |
| commit | 9b3452d1fa3c017d3664ff9e6a601daa6e0576eb (patch) | |
| tree | ac2fdd71c45975f2430d094ef138ccd0a2d835c0 /drivers/dma/Kconfig | |
| parent | usb: musb: dsps: use proper child nodes (diff) | |
| download | linux-9b3452d1fa3c017d3664ff9e6a601daa6e0576eb.tar.xz linux-9b3452d1fa3c017d3664ff9e6a601daa6e0576eb.zip | |
usb: musb dma: add cppi41 dma driver
This driver is currently used by musb' cppi41 couter part. I may merge
both dma engine user of musb at some point but not just yet.
The driver seems to work in RX/TX mode in host mode, tested on mass
storage. I increaed the size of the TX / RX transfers and waited for the
core code to cancel a transfers and it seems to recover.
v2..3:
- use mall transfers on RX side and check data toggle.
- use rndis mode on tx side so we haveon interrupt for 4096 transfers.
- remove custom "transferred" hack and use dmaengine_tx_status() to
compute the total amount of data that has been transferred.
- cancel transfers and reclaim descriptors
v1..v2:
- RX path added
- dma mode 0 & 1 is working
- device tree nodes re-created.
Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Dan Williams <djbw@fb.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/dma/Kconfig')
| -rw-r--r-- | drivers/dma/Kconfig | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig index 6825957c97fb..77bc480117b7 100644 --- a/drivers/dma/Kconfig +++ b/drivers/dma/Kconfig @@ -287,6 +287,14 @@ config DMA_OMAP select DMA_ENGINE select DMA_VIRTUAL_CHANNELS +config TI_CPPI41 + tristate "AM33xx CPPI41 DMA support" + depends on ARCH_OMAP + select DMA_ENGINE + help + The Communications Port Programming Interface (CPPI) 4.1 DMA engine + is currently used by the USB driver on AM335x platforms. + config MMP_PDMA bool "MMP PDMA support" depends on (ARCH_MMP || ARCH_PXA) |