| From | Ben Hutchings <> | Date | Tue, 17 Feb 2015 01:46:53 +0000 | Subject | [PATCH 3.2 099/152] usb: gadget: udc: atmel: change setting for DMA |
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3.2.67-rc1 review patch. If anyone has any objections, please let me know.
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From: Bo Shen <voice.shen@atmel.com>
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> [bwh: Backported to 3.2: adjust filename] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> --- drivers/usb/gadget/atmel_usba_udc.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
--- a/drivers/usb/gadget/atmel_usba_udc.c +++ b/drivers/usb/gadget/atmel_usba_udc.c @@ -739,10 +739,10 @@ static int queue_dma(struct usba_udc *ud req->ctrl = USBA_BF(DMA_BUF_LEN, req->req.length) | USBA_DMA_CH_EN | USBA_DMA_END_BUF_IE - | USBA_DMA_END_TR_EN | USBA_DMA_END_TR_IE; + | USBA_DMA_END_BUF_EN; - if (ep->is_in) - req->ctrl |= USBA_DMA_END_BUF_EN; + if (!ep->is_in) + req->ctrl |= USBA_DMA_END_TR_EN | USBA_DMA_END_TR_IE; /* * Add this request to the queue and submit for DMA if
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