Eric Lee / smarc-ti-linux-kernel

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Commit c811188452a5aaf843ad820105931fe5d57b3ba8

Authored by Bo Shen
Committed by Greg Kroah-Hartman
1 parent 84ac889bee

usb: gadget: udc: atmel: change setting for DMA 

commit f40afdddeb6c54ffd1e2920a5e93e363d6748db6 upstream.

According to the datasheet, when transfer using DMA, the control
setting for IN packet only need END_BUF_EN, END_BUF_IE, CH_EN,
while for OUT packet, need more two bits END_TR_EN and END_TR_IE
to be configured.

Fixes: 914a3f3b3754 (USB: add atmel_usba_udc driver)
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Showing 1 changed file with 3 additions and 3 deletions Side-by-side Diff

drivers/usb/gadget/udc/atmel_usba_udc.c
Diff comments   View file @ c811188
... ... @@ -716,10 +716,10 @@
716 716 req->using_dma = 1;
717 717 req->ctrl = USBA_BF(DMA_BUF_LEN, req->req.length)
718 718 | USBA_DMA_CH_EN | USBA_DMA_END_BUF_IE
719   - | USBA_DMA_END_TR_EN | USBA_DMA_END_TR_IE;
  719 + | USBA_DMA_END_BUF_EN;
720 720  
721   - if (ep->is_in)
722   - req->ctrl |= USBA_DMA_END_BUF_EN;
  721 + if (!ep->is_in)
  722 + req->ctrl |= USBA_DMA_END_TR_EN | USBA_DMA_END_TR_IE;
723 723  
724 724 /*
725 725 * Add this request to the queue and submit for DMA if