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linux/drivers/usb/renesas_usbhs
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Kazuya Mizuguchi 29c7f3e68e usb: renesas_usbhs: Fix DMAC sequence for receiving zero-length packet 
The DREQE bit of the DnFIFOSEL should be set to 1 after the DE bit of
USB-DMAC on R-Car SoCs is set to 1 after the USB-DMAC received a
zero-length packet. Otherwise, a transfer completion interruption
of USB-DMAC doesn't happen. Even if the driver changes the sequence,
normal operations (transmit/receive without zero-length packet) will
not cause any side-effects. So, this patch fixes the sequence anyway.

Signed-off-by: Kazuya Mizuguchi <kazuya.mizuguchi.ks@renesas.com>
[shimoda: revise the commit log]
Fixes: e73a9891b3 ("usb: renesas_usbhs: add DMAEngine support")
Cc: <stable@vger.kernel.org> # v3.1+
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2017-10-11 13:13:52 +03:00
..
common.c usb: renesas_usbhs: fix usbhsc_resume() for !USBHSF_RUNTIME_PWCTRL 2017-07-19 10:38:16 +03:00
common.h usb: renesas_usbhs: add support for USB-DMAC 2015-03-13 10:41:19 -05:00
fifo.c usb: renesas_usbhs: Fix DMAC sequence for receiving zero-length packet 2017-10-11 13:13:52 +03:00
fifo.h usb: renesas_usbhs: constify usbhs_pkt_handle structures 2016-01-24 19:45:09 -08:00
Kconfig usb: renesas_usbhs: Use ARCH_RENESAS 2016-02-20 20:21:53 -08:00
Makefile usb: renesas_usbhs: add R-Car Gen3 power control 2016-03-04 15:14:28 +02:00
mod_gadget.c usb: changes for v4.14 merge window 2017-08-22 13:16:06 -07:00
mod_host.c usb: renesas_usbhs: constify hc_driver structures 2017-07-30 07:26:52 -07:00
mod.c usb: renesas_usbhs: fix clearing the {BRDY,BEMP}STS condition 2016-09-05 13:39:23 +03:00
mod.h renesas_usbhs: cleanup quoted includes 2012-06-05 10:15:25 +02:00
pipe.c usb: renesas_usbhs: make array type_array static const 2017-07-17 13:13:44 +02:00
pipe.h usb: renesas_usbhs: change arguments of dma_map_ctrl() 2016-04-19 11:11:54 +03:00
rcar2.c usb: renesas_usbhs: Remove unneeded #include <linux/platform_data/gpio-rcar.h> 2015-10-20 16:03:36 +02:00
rcar2.h usb: renesas_usbhs: add R-Car Gen. 2 init and power control 2014-07-16 10:06:32 -05:00
rcar3.c usb: renesas_usbhs: Fix UGCTRL2 value for R-Car Gen3 2017-08-03 12:32:25 +03:00
rcar3.h usb: renesas_usbhs: add R-Car Gen3 power control 2016-03-04 15:14:28 +02:00