[v4,0/5] usb: musb: da8xx: Add DMA support

Message ID 20170124101149.14920-1-abailon@baylibre.com
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  • usb: musb: da8xx: Add DMA support
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Message

Alexandre Bailon Jan. 24, 2017, 10:11 a.m.
This series update MUSB driver to add DMA support to DA8xx.
It should be applied on top of
"[PATCH v3 0/3] usb: musb: cppi41: Add a way to manage DMA irq" but
"[PATCH v3 0/3] dmaengine: cppi41: Add dma support to da8xx" and
"[PATCH] arm: davinci: Make the usb20 clock available to PM runtime"
are required to make it work.

Changes in v4:
- Update and clarify the commit message of patch 5
- Fix the typo in patch 3

Changes in v3:
- Remove PM runtime callbacks.
  I have update arch/arm/mach-davinci/pm_domain.c to let PM runtime control
  the usb20 clock.
- Only use PM runtime sync operation.

Changes in v2:
- Clock and IRQ management has been moved to MUSB DA8xx glue
  (was in CPPI 4.1 driver)
- I have added a partial support PM runtime. The goal was to use PM
  runtime to manage clock of MUSB and CPPI 4.1 (they use the same clock).
- CPPI 4.1 is now achild of MUSB DA8xx glue.

Alexandre Bailon (5):
  usb: musb: da8xx: Remove CPPI 3.0 quirk and methods
  usb: musb: Use shared irq
  usb: musb: Add support of CPPI 4.1 DMA controller to DA8xx
  usb: musb: musb_cppi41: Workaround DMA stall issue during teardown
  usb: musb: da8xx: Add a primary support of PM runtime

 drivers/usb/musb/Kconfig       |  4 +--
 drivers/usb/musb/da8xx.c       | 60 +++++++++++++++++++++++++++---------------
 drivers/usb/musb/musb_core.c   |  2 +-
 drivers/usb/musb/musb_core.h   |  1 +
 drivers/usb/musb/musb_cppi41.c |  4 +++
 5 files changed, 47 insertions(+), 24 deletions(-)

-- 
2.10.2

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Comments

Sergei Shtylyov Jan. 24, 2017, 12:22 p.m. | #1
Hello.

On 1/24/2017 1:11 PM, Alexandre Bailon wrote:

> The DMA may hung up if a teardown is initiated while an endpoint is still


    Hang up.

> active (Advisory 2.3.27 of DA8xx errata).

> To workaround this issue, add a delay before to initiate the teardown.

>

> Signed-off-by: Alexandre Bailon <abailon@baylibre.com>

[...]

MBR, Sergei

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