diff options
Diffstat (limited to 'drivers/usb/gadget/s3c_udc_otg_xfer_dma.c')
| -rw-r--r-- | drivers/usb/gadget/s3c_udc_otg_xfer_dma.c | 63 |
1 files changed, 33 insertions, 30 deletions
diff --git a/drivers/usb/gadget/s3c_udc_otg_xfer_dma.c b/drivers/usb/gadget/s3c_udc_otg_xfer_dma.c index 7c7176b..06dfeed 100644 --- a/drivers/usb/gadget/s3c_udc_otg_xfer_dma.c +++ b/drivers/usb/gadget/s3c_udc_otg_xfer_dma.c @@ -110,8 +110,7 @@ static int setdma_rx(struct s3c_ep *ep, struct s3c_request *req) ctrl = readl(®->out_endp[ep_num].doepctl); - writel(the_controller->dma_addr[ep_index(ep)+1], - ®->out_endp[ep_num].doepdma); + writel((unsigned int) ep->dma_buf, ®->out_endp[ep_num].doepdma); writel(DOEPT_SIZ_PKT_CNT(pktcnt) | DOEPT_SIZ_XFER_SIZE(length), ®->out_endp[ep_num].doeptsiz); writel(DEPCTL_EPENA|DEPCTL_CNAK|ctrl, ®->out_endp[ep_num].doepctl); @@ -134,7 +133,6 @@ int setdma_tx(struct s3c_ep *ep, struct s3c_request *req) u32 *buf, ctrl = 0; u32 length, pktcnt; u32 ep_num = ep_index(ep); - u32 *p = the_controller->dma_buf[ep_index(ep)+1]; buf = req->req.buf + req->req.actual; length = req->req.length - req->req.actual; @@ -144,10 +142,10 @@ int setdma_tx(struct s3c_ep *ep, struct s3c_request *req) ep->len = length; ep->dma_buf = buf; - memcpy(p, ep->dma_buf, length); - flush_dcache_range((unsigned long) p , - (unsigned long) p + DMA_BUFFER_SIZE); + flush_dcache_range((unsigned long) ep->dma_buf, + (unsigned long) ep->dma_buf + + ROUND(ep->len, CONFIG_SYS_CACHELINE_SIZE)); if (length == 0) pktcnt = 1; @@ -160,8 +158,7 @@ int setdma_tx(struct s3c_ep *ep, struct s3c_request *req) while (readl(®->grstctl) & TX_FIFO_FLUSH) ; - writel(the_controller->dma_addr[ep_index(ep)+1], - ®->in_endp[ep_num].diepdma); + writel((unsigned long) ep->dma_buf, ®->in_endp[ep_num].diepdma); writel(DIEPT_SIZ_PKT_CNT(pktcnt) | DIEPT_SIZ_XFER_SIZE(length), ®->in_endp[ep_num].dieptsiz); @@ -194,7 +191,6 @@ static void complete_rx(struct s3c_udc *dev, u8 ep_num) struct s3c_ep *ep = &dev->ep[ep_num]; struct s3c_request *req = NULL; u32 ep_tsr = 0, xfer_size = 0, is_short = 0; - u32 *p = the_controller->dma_buf[ep_index(ep)+1]; if (list_empty(&ep->queue)) { debug_cond(DEBUG_OUT_EP != 0, @@ -214,10 +210,23 @@ static void complete_rx(struct s3c_udc *dev, u8 ep_num) xfer_size = ep->len - xfer_size; - invalidate_dcache_range((unsigned long) p, - (unsigned long) p + DMA_BUFFER_SIZE); - - memcpy(ep->dma_buf, p, ep->len); + /* + * NOTE: + * + * Please be careful with proper buffer allocation for USB request, + * which needs to be aligned to CONFIG_SYS_CACHELINE_SIZE, not only + * with starting address, but also its size shall be a cache line + * multiplication. + * + * This will prevent from corruption of data allocated immediatelly + * before or after the buffer. + * + * For armv7, the cache_v7.c provides proper code to emit "ERROR" + * message to warn users. + */ + invalidate_dcache_range((unsigned long) ep->dma_buf, + (unsigned long) ep->dma_buf + + ROUND(xfer_size, CONFIG_SYS_CACHELINE_SIZE)); req->req.actual += min(xfer_size, req->req.length - req->req.actual); is_short = (xfer_size < ep->ep.maxpacket); @@ -711,19 +720,14 @@ static int write_fifo_ep0(struct s3c_ep *ep, struct s3c_request *req) int s3c_fifo_read(struct s3c_ep *ep, u32 *cp, int max) { - u32 bytes; - - bytes = sizeof(struct usb_ctrlrequest); - - invalidate_dcache_range((unsigned long) ep->dev->dma_buf[ep_index(ep)], - (unsigned long) ep->dev->dma_buf[ep_index(ep)] - + DMA_BUFFER_SIZE); + invalidate_dcache_range((unsigned long)cp, (unsigned long)cp + + ROUND(max, CONFIG_SYS_CACHELINE_SIZE)); debug_cond(DEBUG_EP0 != 0, - "%s: bytes=%d, ep_index=%d %p\n", __func__, - bytes, ep_index(ep), ep->dev->dma_buf[ep_index(ep)]); + "%s: bytes=%d, ep_index=%d 0x%p\n", __func__, + max, ep_index(ep), cp); - return bytes; + return max; } /** @@ -855,14 +859,12 @@ static int s3c_ep0_write(struct s3c_udc *dev) return 1; } -u16 g_status; - int s3c_udc_get_status(struct s3c_udc *dev, struct usb_ctrlrequest *crq) { u8 ep_num = crq->wIndex & 0x7F; + u16 g_status = 0; u32 ep_ctrl; - u32 *p = the_controller->dma_buf[1]; debug_cond(DEBUG_SETUP != 0, "%s: *** USB_REQ_GET_STATUS\n", __func__); @@ -900,12 +902,13 @@ int s3c_udc_get_status(struct s3c_udc *dev, return 1; } - memcpy(p, &g_status, sizeof(g_status)); + memcpy(usb_ctrl, &g_status, sizeof(g_status)); - flush_dcache_range((unsigned long) p, - (unsigned long) p + DMA_BUFFER_SIZE); + flush_dcache_range((unsigned long) usb_ctrl, + (unsigned long) usb_ctrl + + ROUND(sizeof(g_status), CONFIG_SYS_CACHELINE_SIZE)); - writel(the_controller->dma_addr[1], ®->in_endp[EP0_CON].diepdma); + writel(usb_ctrl_dma_addr, ®->in_endp[EP0_CON].diepdma); writel(DIEPT_SIZ_PKT_CNT(1) | DIEPT_SIZ_XFER_SIZE(2), ®->in_endp[EP0_CON].dieptsiz); |