diff options
Diffstat (limited to 'drivers/usb/dwc2/gadget.c')
| -rw-r--r-- | drivers/usb/dwc2/gadget.c | 80 |
1 files changed, 50 insertions, 30 deletions
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index 4c5f516..09f4cbd 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -182,14 +182,29 @@ static void s3c_hsotg_init_fifo(struct s3c_hsotg *hsotg) /* start at the end of the GNPTXFSIZ, rounded up */ addr = 2048 + 1024; - size = 768; /* - * currently we allocate TX FIFOs for all possible endpoints, - * and assume that they are all the same size. + * Because we have not enough memory to have each TX FIFO of size at + * least 3072 bytes (the maximum single packet size), we create four + * FIFOs of lenght 1024, and four of length 3072 bytes, and assing + * them to endpoints dynamically according to maxpacket size value of + * given endpoint. */ - for (ep = 1; ep <= 15; ep++) { + /* 256*4=1024 bytes FIFO length */ + size = 256; + for (ep = 1; ep <= 4; ep++) { + val = addr; + val |= size << FIFOSIZE_DEPTH_SHIFT; + WARN_ONCE(addr + size > hsotg->fifo_mem, + "insufficient fifo memory"); + addr += size; + + writel(val, hsotg->regs + DPTXFSIZN(ep)); + } + /* 768*4=3072 bytes FIFO length */ + size = 768; + for (ep = 5; ep <= 8; ep++) { val = addr; val |= size << FIFOSIZE_DEPTH_SHIFT; WARN_ONCE(addr + size > hsotg->fifo_mem, @@ -1834,7 +1849,7 @@ static void s3c_hsotg_epint(struct s3c_hsotg *hsotg, unsigned int idx, if (dir_in) { int epctl = readl(hsotg->regs + epctl_reg); - s3c_hsotg_txfifo_flush(hsotg, idx); + s3c_hsotg_txfifo_flush(hsotg, hs_ep->fifo_index); if ((epctl & DXEPCTL_STALL) && (epctl & DXEPCTL_EPTYPE_BULK)) { @@ -1983,6 +1998,7 @@ static void kill_all_requests(struct s3c_hsotg *hsotg, int result, bool force) { struct s3c_hsotg_req *req, *treq; + unsigned size; list_for_each_entry_safe(req, treq, &ep->queue, queue) { /* @@ -1996,9 +2012,11 @@ static void kill_all_requests(struct s3c_hsotg *hsotg, s3c_hsotg_complete_request(hsotg, ep, req, result); } - if (hsotg->dedicated_fifos) - if ((readl(hsotg->regs + DTXFSTS(ep->index)) & 0xffff) * 4 < 3072) - s3c_hsotg_txfifo_flush(hsotg, ep->index); + if (!hsotg->dedicated_fifos) + return; + size = (readl(hsotg->regs + DTXFSTS(ep->index)) & 0xffff) * 4; + if (size < ep->fifo_size) + s3c_hsotg_txfifo_flush(hsotg, ep->fifo_index); } /** @@ -2439,6 +2457,7 @@ static int s3c_hsotg_ep_enable(struct usb_ep *ep, u32 epctrl; u32 mps; int dir_in; + int i, val, size; int ret = 0; dev_dbg(hsotg->dev, @@ -2511,17 +2530,8 @@ static int s3c_hsotg_ep_enable(struct usb_ep *ep, break; case USB_ENDPOINT_XFER_INT: - if (dir_in) { - /* - * Allocate our TxFNum by simply using the index - * of the endpoint for the moment. We could do - * something better if the host indicates how - * many FIFOs we are expecting to use. - */ - + if (dir_in) hs_ep->periodic = 1; - epctrl |= DXEPCTL_TXFNUM(index); - } epctrl |= DXEPCTL_EPTYPE_INTERRUPT; break; @@ -2535,8 +2545,25 @@ static int s3c_hsotg_ep_enable(struct usb_ep *ep, * if the hardware has dedicated fifos, we must give each IN EP * a unique tx-fifo even if it is non-periodic. */ - if (dir_in && hsotg->dedicated_fifos) - epctrl |= DXEPCTL_TXFNUM(index); + if (dir_in && hsotg->dedicated_fifos) { + size = hs_ep->ep.maxpacket*hs_ep->mc; + for (i = 1; i <= 8; ++i) { + if (hsotg->fifo_map & (1<<i)) + continue; + val = readl(hsotg->regs + DPTXFSIZN(i)); + val = (val >> FIFOSIZE_DEPTH_SHIFT)*4; + if (val < size) + continue; + hsotg->fifo_map |= 1<<i; + + epctrl |= DXEPCTL_TXFNUM(i); + hs_ep->fifo_index = i; + hs_ep->fifo_size = val; + break; + } + if (i == 8) + return -ENOMEM; + } /* for non control endpoints, set PID to D0 */ if (index) @@ -2583,6 +2610,9 @@ static int s3c_hsotg_ep_disable(struct usb_ep *ep) /* terminate all requests with shutdown */ kill_all_requests(hsotg, hs_ep, -ESHUTDOWN, false); + hsotg->fifo_map &= ~(1<<hs_ep->fifo_index); + hs_ep->fifo_index = 0; + hs_ep->fifo_size = 0; ctrl = readl(hsotg->regs + epctrl_reg); ctrl &= ~DXEPCTL_EPENA; @@ -2974,7 +3004,6 @@ static void s3c_hsotg_initep(struct s3c_hsotg *hsotg, struct s3c_hsotg_ep *hs_ep, int epnum) { - u32 ptxfifo; char *dir; if (epnum == 0) @@ -3003,15 +3032,6 @@ static void s3c_hsotg_initep(struct s3c_hsotg *hsotg, hs_ep->ep.ops = &s3c_hsotg_ep_ops; /* - * Read the FIFO size for the Periodic TX FIFO, even if we're - * an OUT endpoint, we may as well do this if in future the - * code is changed to make each endpoint's direction changeable. - */ - - ptxfifo = readl(hsotg->regs + DPTXFSIZN(epnum)); - hs_ep->fifo_size = FIFOSIZE_DEPTH_GET(ptxfifo) * 4; - - /* * if we're using dma, we need to set the next-endpoint pointer * to be something valid. */ |
