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1224 lines
29 KiB
1224 lines
29 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* FOTG210 UDC Driver supports Bulk transfer so far |
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* |
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* Copyright (C) 2013 Faraday Technology Corporation |
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* |
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* Author : Yuan-Hsin Chen <[email protected]> |
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*/ |
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#include <linux/dma-mapping.h> |
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#include <linux/err.h> |
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#include <linux/interrupt.h> |
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#include <linux/io.h> |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <linux/usb/ch9.h> |
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#include <linux/usb/gadget.h> |
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#include "fotg210.h" |
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#define DRIVER_DESC "FOTG210 USB Device Controller Driver" |
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#define DRIVER_VERSION "30-April-2013" |
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static const char udc_name[] = "fotg210_udc"; |
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static const char * const fotg210_ep_name[] = { |
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"ep0", "ep1", "ep2", "ep3", "ep4"}; |
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static void fotg210_disable_fifo_int(struct fotg210_ep *ep) |
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{ |
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u32 value = ioread32(ep->fotg210->reg + FOTG210_DMISGR1); |
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if (ep->dir_in) |
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value |= DMISGR1_MF_IN_INT(ep->epnum - 1); |
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else |
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value |= DMISGR1_MF_OUTSPK_INT(ep->epnum - 1); |
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iowrite32(value, ep->fotg210->reg + FOTG210_DMISGR1); |
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} |
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static void fotg210_enable_fifo_int(struct fotg210_ep *ep) |
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{ |
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u32 value = ioread32(ep->fotg210->reg + FOTG210_DMISGR1); |
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if (ep->dir_in) |
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value &= ~DMISGR1_MF_IN_INT(ep->epnum - 1); |
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else |
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value &= ~DMISGR1_MF_OUTSPK_INT(ep->epnum - 1); |
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iowrite32(value, ep->fotg210->reg + FOTG210_DMISGR1); |
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} |
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static void fotg210_set_cxdone(struct fotg210_udc *fotg210) |
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{ |
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u32 value = ioread32(fotg210->reg + FOTG210_DCFESR); |
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value |= DCFESR_CX_DONE; |
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iowrite32(value, fotg210->reg + FOTG210_DCFESR); |
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} |
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static void fotg210_done(struct fotg210_ep *ep, struct fotg210_request *req, |
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int status) |
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{ |
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list_del_init(&req->queue); |
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|
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/* don't modify queue heads during completion callback */ |
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if (ep->fotg210->gadget.speed == USB_SPEED_UNKNOWN) |
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req->req.status = -ESHUTDOWN; |
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else |
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req->req.status = status; |
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spin_unlock(&ep->fotg210->lock); |
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usb_gadget_giveback_request(&ep->ep, &req->req); |
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spin_lock(&ep->fotg210->lock); |
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if (ep->epnum) { |
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if (list_empty(&ep->queue)) |
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fotg210_disable_fifo_int(ep); |
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} else { |
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fotg210_set_cxdone(ep->fotg210); |
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} |
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} |
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static void fotg210_fifo_ep_mapping(struct fotg210_ep *ep, u32 epnum, |
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u32 dir_in) |
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{ |
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struct fotg210_udc *fotg210 = ep->fotg210; |
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u32 val; |
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/* Driver should map an ep to a fifo and then map the fifo |
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* to the ep. What a brain-damaged design! |
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*/ |
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/* map a fifo to an ep */ |
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val = ioread32(fotg210->reg + FOTG210_EPMAP); |
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val &= ~EPMAP_FIFONOMSK(epnum, dir_in); |
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val |= EPMAP_FIFONO(epnum, dir_in); |
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iowrite32(val, fotg210->reg + FOTG210_EPMAP); |
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/* map the ep to the fifo */ |
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val = ioread32(fotg210->reg + FOTG210_FIFOMAP); |
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val &= ~FIFOMAP_EPNOMSK(epnum); |
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val |= FIFOMAP_EPNO(epnum); |
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iowrite32(val, fotg210->reg + FOTG210_FIFOMAP); |
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/* enable fifo */ |
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val = ioread32(fotg210->reg + FOTG210_FIFOCF); |
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val |= FIFOCF_FIFO_EN(epnum - 1); |
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iowrite32(val, fotg210->reg + FOTG210_FIFOCF); |
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} |
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static void fotg210_set_fifo_dir(struct fotg210_ep *ep, u32 epnum, u32 dir_in) |
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{ |
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struct fotg210_udc *fotg210 = ep->fotg210; |
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u32 val; |
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val = ioread32(fotg210->reg + FOTG210_FIFOMAP); |
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val |= (dir_in ? FIFOMAP_DIRIN(epnum - 1) : FIFOMAP_DIROUT(epnum - 1)); |
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iowrite32(val, fotg210->reg + FOTG210_FIFOMAP); |
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} |
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static void fotg210_set_tfrtype(struct fotg210_ep *ep, u32 epnum, u32 type) |
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{ |
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struct fotg210_udc *fotg210 = ep->fotg210; |
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u32 val; |
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val = ioread32(fotg210->reg + FOTG210_FIFOCF); |
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val |= FIFOCF_TYPE(type, epnum - 1); |
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iowrite32(val, fotg210->reg + FOTG210_FIFOCF); |
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} |
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static void fotg210_set_mps(struct fotg210_ep *ep, u32 epnum, u32 mps, |
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u32 dir_in) |
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{ |
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struct fotg210_udc *fotg210 = ep->fotg210; |
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u32 val; |
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u32 offset = dir_in ? FOTG210_INEPMPSR(epnum) : |
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FOTG210_OUTEPMPSR(epnum); |
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val = ioread32(fotg210->reg + offset); |
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val |= INOUTEPMPSR_MPS(mps); |
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iowrite32(val, fotg210->reg + offset); |
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} |
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static int fotg210_config_ep(struct fotg210_ep *ep, |
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const struct usb_endpoint_descriptor *desc) |
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{ |
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struct fotg210_udc *fotg210 = ep->fotg210; |
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fotg210_set_fifo_dir(ep, ep->epnum, ep->dir_in); |
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fotg210_set_tfrtype(ep, ep->epnum, ep->type); |
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fotg210_set_mps(ep, ep->epnum, ep->ep.maxpacket, ep->dir_in); |
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fotg210_fifo_ep_mapping(ep, ep->epnum, ep->dir_in); |
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fotg210->ep[ep->epnum] = ep; |
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return 0; |
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} |
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static int fotg210_ep_enable(struct usb_ep *_ep, |
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const struct usb_endpoint_descriptor *desc) |
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{ |
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struct fotg210_ep *ep; |
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ep = container_of(_ep, struct fotg210_ep, ep); |
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ep->desc = desc; |
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ep->epnum = usb_endpoint_num(desc); |
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ep->type = usb_endpoint_type(desc); |
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ep->dir_in = usb_endpoint_dir_in(desc); |
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ep->ep.maxpacket = usb_endpoint_maxp(desc); |
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return fotg210_config_ep(ep, desc); |
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} |
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static void fotg210_reset_tseq(struct fotg210_udc *fotg210, u8 epnum) |
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{ |
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struct fotg210_ep *ep = fotg210->ep[epnum]; |
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u32 value; |
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void __iomem *reg; |
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reg = (ep->dir_in) ? |
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fotg210->reg + FOTG210_INEPMPSR(epnum) : |
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fotg210->reg + FOTG210_OUTEPMPSR(epnum); |
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/* Note: Driver needs to set and clear INOUTEPMPSR_RESET_TSEQ |
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* bit. Controller wouldn't clear this bit. WTF!!! |
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*/ |
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value = ioread32(reg); |
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value |= INOUTEPMPSR_RESET_TSEQ; |
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iowrite32(value, reg); |
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value = ioread32(reg); |
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value &= ~INOUTEPMPSR_RESET_TSEQ; |
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iowrite32(value, reg); |
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} |
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static int fotg210_ep_release(struct fotg210_ep *ep) |
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{ |
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if (!ep->epnum) |
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return 0; |
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ep->epnum = 0; |
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ep->stall = 0; |
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ep->wedged = 0; |
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fotg210_reset_tseq(ep->fotg210, ep->epnum); |
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return 0; |
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} |
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static int fotg210_ep_disable(struct usb_ep *_ep) |
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{ |
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struct fotg210_ep *ep; |
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struct fotg210_request *req; |
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unsigned long flags; |
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BUG_ON(!_ep); |
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ep = container_of(_ep, struct fotg210_ep, ep); |
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while (!list_empty(&ep->queue)) { |
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req = list_entry(ep->queue.next, |
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struct fotg210_request, queue); |
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spin_lock_irqsave(&ep->fotg210->lock, flags); |
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fotg210_done(ep, req, -ECONNRESET); |
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spin_unlock_irqrestore(&ep->fotg210->lock, flags); |
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} |
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return fotg210_ep_release(ep); |
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} |
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static struct usb_request *fotg210_ep_alloc_request(struct usb_ep *_ep, |
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gfp_t gfp_flags) |
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{ |
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struct fotg210_request *req; |
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req = kzalloc(sizeof(struct fotg210_request), gfp_flags); |
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if (!req) |
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return NULL; |
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INIT_LIST_HEAD(&req->queue); |
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return &req->req; |
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} |
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static void fotg210_ep_free_request(struct usb_ep *_ep, |
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struct usb_request *_req) |
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{ |
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struct fotg210_request *req; |
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req = container_of(_req, struct fotg210_request, req); |
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kfree(req); |
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} |
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static void fotg210_enable_dma(struct fotg210_ep *ep, |
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dma_addr_t d, u32 len) |
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{ |
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u32 value; |
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struct fotg210_udc *fotg210 = ep->fotg210; |
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/* set transfer length and direction */ |
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value = ioread32(fotg210->reg + FOTG210_DMACPSR1); |
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value &= ~(DMACPSR1_DMA_LEN(0xFFFF) | DMACPSR1_DMA_TYPE(1)); |
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value |= DMACPSR1_DMA_LEN(len) | DMACPSR1_DMA_TYPE(ep->dir_in); |
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iowrite32(value, fotg210->reg + FOTG210_DMACPSR1); |
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/* set device DMA target FIFO number */ |
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value = ioread32(fotg210->reg + FOTG210_DMATFNR); |
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if (ep->epnum) |
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value |= DMATFNR_ACC_FN(ep->epnum - 1); |
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else |
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value |= DMATFNR_ACC_CXF; |
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iowrite32(value, fotg210->reg + FOTG210_DMATFNR); |
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/* set DMA memory address */ |
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iowrite32(d, fotg210->reg + FOTG210_DMACPSR2); |
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/* enable MDMA_EROR and MDMA_CMPLT interrupt */ |
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value = ioread32(fotg210->reg + FOTG210_DMISGR2); |
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value &= ~(DMISGR2_MDMA_CMPLT | DMISGR2_MDMA_ERROR); |
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iowrite32(value, fotg210->reg + FOTG210_DMISGR2); |
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/* start DMA */ |
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value = ioread32(fotg210->reg + FOTG210_DMACPSR1); |
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value |= DMACPSR1_DMA_START; |
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iowrite32(value, fotg210->reg + FOTG210_DMACPSR1); |
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} |
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static void fotg210_disable_dma(struct fotg210_ep *ep) |
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{ |
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iowrite32(DMATFNR_DISDMA, ep->fotg210->reg + FOTG210_DMATFNR); |
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} |
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static void fotg210_wait_dma_done(struct fotg210_ep *ep) |
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{ |
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u32 value; |
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do { |
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value = ioread32(ep->fotg210->reg + FOTG210_DISGR2); |
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if ((value & DISGR2_USBRST_INT) || |
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(value & DISGR2_DMA_ERROR)) |
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goto dma_reset; |
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} while (!(value & DISGR2_DMA_CMPLT)); |
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value &= ~DISGR2_DMA_CMPLT; |
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iowrite32(value, ep->fotg210->reg + FOTG210_DISGR2); |
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return; |
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dma_reset: |
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value = ioread32(ep->fotg210->reg + FOTG210_DMACPSR1); |
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value |= DMACPSR1_DMA_ABORT; |
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iowrite32(value, ep->fotg210->reg + FOTG210_DMACPSR1); |
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/* reset fifo */ |
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if (ep->epnum) { |
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value = ioread32(ep->fotg210->reg + |
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FOTG210_FIBCR(ep->epnum - 1)); |
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value |= FIBCR_FFRST; |
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iowrite32(value, ep->fotg210->reg + |
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FOTG210_FIBCR(ep->epnum - 1)); |
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} else { |
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value = ioread32(ep->fotg210->reg + FOTG210_DCFESR); |
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value |= DCFESR_CX_CLR; |
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iowrite32(value, ep->fotg210->reg + FOTG210_DCFESR); |
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} |
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} |
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static void fotg210_start_dma(struct fotg210_ep *ep, |
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struct fotg210_request *req) |
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{ |
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struct device *dev = &ep->fotg210->gadget.dev; |
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dma_addr_t d; |
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u8 *buffer; |
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u32 length; |
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if (ep->epnum) { |
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if (ep->dir_in) { |
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buffer = req->req.buf; |
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length = req->req.length; |
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} else { |
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buffer = req->req.buf + req->req.actual; |
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length = ioread32(ep->fotg210->reg + |
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FOTG210_FIBCR(ep->epnum - 1)) & FIBCR_BCFX; |
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if (length > req->req.length - req->req.actual) |
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length = req->req.length - req->req.actual; |
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} |
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} else { |
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buffer = req->req.buf + req->req.actual; |
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if (req->req.length - req->req.actual > ep->ep.maxpacket) |
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length = ep->ep.maxpacket; |
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else |
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length = req->req.length - req->req.actual; |
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} |
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d = dma_map_single(dev, buffer, length, |
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ep->dir_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE); |
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if (dma_mapping_error(dev, d)) { |
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pr_err("dma_mapping_error\n"); |
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return; |
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} |
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fotg210_enable_dma(ep, d, length); |
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/* check if dma is done */ |
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fotg210_wait_dma_done(ep); |
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fotg210_disable_dma(ep); |
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/* update actual transfer length */ |
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req->req.actual += length; |
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dma_unmap_single(dev, d, length, DMA_TO_DEVICE); |
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} |
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static void fotg210_ep0_queue(struct fotg210_ep *ep, |
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struct fotg210_request *req) |
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{ |
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if (!req->req.length) { |
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fotg210_done(ep, req, 0); |
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return; |
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} |
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if (ep->dir_in) { /* if IN */ |
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fotg210_start_dma(ep, req); |
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if (req->req.length == req->req.actual) |
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fotg210_done(ep, req, 0); |
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} else { /* OUT */ |
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u32 value = ioread32(ep->fotg210->reg + FOTG210_DMISGR0); |
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value &= ~DMISGR0_MCX_OUT_INT; |
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iowrite32(value, ep->fotg210->reg + FOTG210_DMISGR0); |
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} |
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} |
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static int fotg210_ep_queue(struct usb_ep *_ep, struct usb_request *_req, |
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gfp_t gfp_flags) |
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{ |
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struct fotg210_ep *ep; |
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struct fotg210_request *req; |
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unsigned long flags; |
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int request = 0; |
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ep = container_of(_ep, struct fotg210_ep, ep); |
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req = container_of(_req, struct fotg210_request, req); |
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if (ep->fotg210->gadget.speed == USB_SPEED_UNKNOWN) |
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return -ESHUTDOWN; |
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spin_lock_irqsave(&ep->fotg210->lock, flags); |
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if (list_empty(&ep->queue)) |
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request = 1; |
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list_add_tail(&req->queue, &ep->queue); |
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req->req.actual = 0; |
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req->req.status = -EINPROGRESS; |
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if (!ep->epnum) /* ep0 */ |
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fotg210_ep0_queue(ep, req); |
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else if (request && !ep->stall) |
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fotg210_enable_fifo_int(ep); |
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spin_unlock_irqrestore(&ep->fotg210->lock, flags); |
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return 0; |
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} |
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static int fotg210_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) |
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{ |
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struct fotg210_ep *ep; |
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struct fotg210_request *req; |
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unsigned long flags; |
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ep = container_of(_ep, struct fotg210_ep, ep); |
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req = container_of(_req, struct fotg210_request, req); |
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spin_lock_irqsave(&ep->fotg210->lock, flags); |
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if (!list_empty(&ep->queue)) |
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fotg210_done(ep, req, -ECONNRESET); |
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spin_unlock_irqrestore(&ep->fotg210->lock, flags); |
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return 0; |
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} |
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static void fotg210_set_epnstall(struct fotg210_ep *ep) |
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{ |
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struct fotg210_udc *fotg210 = ep->fotg210; |
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u32 value; |
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void __iomem *reg; |
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|
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/* check if IN FIFO is empty before stall */ |
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if (ep->dir_in) { |
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do { |
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value = ioread32(fotg210->reg + FOTG210_DCFESR); |
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} while (!(value & DCFESR_FIFO_EMPTY(ep->epnum - 1))); |
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} |
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reg = (ep->dir_in) ? |
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fotg210->reg + FOTG210_INEPMPSR(ep->epnum) : |
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fotg210->reg + FOTG210_OUTEPMPSR(ep->epnum); |
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value = ioread32(reg); |
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value |= INOUTEPMPSR_STL_EP; |
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iowrite32(value, reg); |
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} |
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|
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static void fotg210_clear_epnstall(struct fotg210_ep *ep) |
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{ |
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struct fotg210_udc *fotg210 = ep->fotg210; |
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u32 value; |
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void __iomem *reg; |
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|
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reg = (ep->dir_in) ? |
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fotg210->reg + FOTG210_INEPMPSR(ep->epnum) : |
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fotg210->reg + FOTG210_OUTEPMPSR(ep->epnum); |
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value = ioread32(reg); |
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value &= ~INOUTEPMPSR_STL_EP; |
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iowrite32(value, reg); |
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} |
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static int fotg210_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedge) |
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{ |
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struct fotg210_ep *ep; |
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struct fotg210_udc *fotg210; |
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unsigned long flags; |
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ep = container_of(_ep, struct fotg210_ep, ep); |
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fotg210 = ep->fotg210; |
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|
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spin_lock_irqsave(&ep->fotg210->lock, flags); |
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|
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if (value) { |
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fotg210_set_epnstall(ep); |
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ep->stall = 1; |
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if (wedge) |
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ep->wedged = 1; |
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} else { |
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fotg210_reset_tseq(fotg210, ep->epnum); |
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fotg210_clear_epnstall(ep); |
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ep->stall = 0; |
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ep->wedged = 0; |
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if (!list_empty(&ep->queue)) |
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fotg210_enable_fifo_int(ep); |
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} |
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|
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spin_unlock_irqrestore(&ep->fotg210->lock, flags); |
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return 0; |
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} |
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|
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static int fotg210_ep_set_halt(struct usb_ep *_ep, int value) |
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{ |
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return fotg210_set_halt_and_wedge(_ep, value, 0); |
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} |
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|
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static int fotg210_ep_set_wedge(struct usb_ep *_ep) |
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{ |
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return fotg210_set_halt_and_wedge(_ep, 1, 1); |
|
} |
|
|
|
static void fotg210_ep_fifo_flush(struct usb_ep *_ep) |
|
{ |
|
} |
|
|
|
static const struct usb_ep_ops fotg210_ep_ops = { |
|
.enable = fotg210_ep_enable, |
|
.disable = fotg210_ep_disable, |
|
|
|
.alloc_request = fotg210_ep_alloc_request, |
|
.free_request = fotg210_ep_free_request, |
|
|
|
.queue = fotg210_ep_queue, |
|
.dequeue = fotg210_ep_dequeue, |
|
|
|
.set_halt = fotg210_ep_set_halt, |
|
.fifo_flush = fotg210_ep_fifo_flush, |
|
.set_wedge = fotg210_ep_set_wedge, |
|
}; |
|
|
|
static void fotg210_clear_tx0byte(struct fotg210_udc *fotg210) |
|
{ |
|
u32 value = ioread32(fotg210->reg + FOTG210_TX0BYTE); |
|
|
|
value &= ~(TX0BYTE_EP1 | TX0BYTE_EP2 | TX0BYTE_EP3 |
|
| TX0BYTE_EP4); |
|
iowrite32(value, fotg210->reg + FOTG210_TX0BYTE); |
|
} |
|
|
|
static void fotg210_clear_rx0byte(struct fotg210_udc *fotg210) |
|
{ |
|
u32 value = ioread32(fotg210->reg + FOTG210_RX0BYTE); |
|
|
|
value &= ~(RX0BYTE_EP1 | RX0BYTE_EP2 | RX0BYTE_EP3 |
|
| RX0BYTE_EP4); |
|
iowrite32(value, fotg210->reg + FOTG210_RX0BYTE); |
|
} |
|
|
|
/* read 8-byte setup packet only */ |
|
static void fotg210_rdsetupp(struct fotg210_udc *fotg210, |
|
u8 *buffer) |
|
{ |
|
int i = 0; |
|
u8 *tmp = buffer; |
|
u32 data; |
|
u32 length = 8; |
|
|
|
iowrite32(DMATFNR_ACC_CXF, fotg210->reg + FOTG210_DMATFNR); |
|
|
|
for (i = (length >> 2); i > 0; i--) { |
|
data = ioread32(fotg210->reg + FOTG210_CXPORT); |
|
*tmp = data & 0xFF; |
|
*(tmp + 1) = (data >> 8) & 0xFF; |
|
*(tmp + 2) = (data >> 16) & 0xFF; |
|
*(tmp + 3) = (data >> 24) & 0xFF; |
|
tmp = tmp + 4; |
|
} |
|
|
|
switch (length % 4) { |
|
case 1: |
|
data = ioread32(fotg210->reg + FOTG210_CXPORT); |
|
*tmp = data & 0xFF; |
|
break; |
|
case 2: |
|
data = ioread32(fotg210->reg + FOTG210_CXPORT); |
|
*tmp = data & 0xFF; |
|
*(tmp + 1) = (data >> 8) & 0xFF; |
|
break; |
|
case 3: |
|
data = ioread32(fotg210->reg + FOTG210_CXPORT); |
|
*tmp = data & 0xFF; |
|
*(tmp + 1) = (data >> 8) & 0xFF; |
|
*(tmp + 2) = (data >> 16) & 0xFF; |
|
break; |
|
default: |
|
break; |
|
} |
|
|
|
iowrite32(DMATFNR_DISDMA, fotg210->reg + FOTG210_DMATFNR); |
|
} |
|
|
|
static void fotg210_set_configuration(struct fotg210_udc *fotg210) |
|
{ |
|
u32 value = ioread32(fotg210->reg + FOTG210_DAR); |
|
|
|
value |= DAR_AFT_CONF; |
|
iowrite32(value, fotg210->reg + FOTG210_DAR); |
|
} |
|
|
|
static void fotg210_set_dev_addr(struct fotg210_udc *fotg210, u32 addr) |
|
{ |
|
u32 value = ioread32(fotg210->reg + FOTG210_DAR); |
|
|
|
value |= (addr & 0x7F); |
|
iowrite32(value, fotg210->reg + FOTG210_DAR); |
|
} |
|
|
|
static void fotg210_set_cxstall(struct fotg210_udc *fotg210) |
|
{ |
|
u32 value = ioread32(fotg210->reg + FOTG210_DCFESR); |
|
|
|
value |= DCFESR_CX_STL; |
|
iowrite32(value, fotg210->reg + FOTG210_DCFESR); |
|
} |
|
|
|
static void fotg210_request_error(struct fotg210_udc *fotg210) |
|
{ |
|
fotg210_set_cxstall(fotg210); |
|
pr_err("request error!!\n"); |
|
} |
|
|
|
static void fotg210_set_address(struct fotg210_udc *fotg210, |
|
struct usb_ctrlrequest *ctrl) |
|
{ |
|
if (ctrl->wValue >= 0x0100) { |
|
fotg210_request_error(fotg210); |
|
} else { |
|
fotg210_set_dev_addr(fotg210, ctrl->wValue); |
|
fotg210_set_cxdone(fotg210); |
|
} |
|
} |
|
|
|
static void fotg210_set_feature(struct fotg210_udc *fotg210, |
|
struct usb_ctrlrequest *ctrl) |
|
{ |
|
switch (ctrl->bRequestType & USB_RECIP_MASK) { |
|
case USB_RECIP_DEVICE: |
|
fotg210_set_cxdone(fotg210); |
|
break; |
|
case USB_RECIP_INTERFACE: |
|
fotg210_set_cxdone(fotg210); |
|
break; |
|
case USB_RECIP_ENDPOINT: { |
|
u8 epnum; |
|
epnum = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK; |
|
if (epnum) |
|
fotg210_set_epnstall(fotg210->ep[epnum]); |
|
else |
|
fotg210_set_cxstall(fotg210); |
|
fotg210_set_cxdone(fotg210); |
|
} |
|
break; |
|
default: |
|
fotg210_request_error(fotg210); |
|
break; |
|
} |
|
} |
|
|
|
static void fotg210_clear_feature(struct fotg210_udc *fotg210, |
|
struct usb_ctrlrequest *ctrl) |
|
{ |
|
struct fotg210_ep *ep = |
|
fotg210->ep[ctrl->wIndex & USB_ENDPOINT_NUMBER_MASK]; |
|
|
|
switch (ctrl->bRequestType & USB_RECIP_MASK) { |
|
case USB_RECIP_DEVICE: |
|
fotg210_set_cxdone(fotg210); |
|
break; |
|
case USB_RECIP_INTERFACE: |
|
fotg210_set_cxdone(fotg210); |
|
break; |
|
case USB_RECIP_ENDPOINT: |
|
if (ctrl->wIndex & USB_ENDPOINT_NUMBER_MASK) { |
|
if (ep->wedged) { |
|
fotg210_set_cxdone(fotg210); |
|
break; |
|
} |
|
if (ep->stall) |
|
fotg210_set_halt_and_wedge(&ep->ep, 0, 0); |
|
} |
|
fotg210_set_cxdone(fotg210); |
|
break; |
|
default: |
|
fotg210_request_error(fotg210); |
|
break; |
|
} |
|
} |
|
|
|
static int fotg210_is_epnstall(struct fotg210_ep *ep) |
|
{ |
|
struct fotg210_udc *fotg210 = ep->fotg210; |
|
u32 value; |
|
void __iomem *reg; |
|
|
|
reg = (ep->dir_in) ? |
|
fotg210->reg + FOTG210_INEPMPSR(ep->epnum) : |
|
fotg210->reg + FOTG210_OUTEPMPSR(ep->epnum); |
|
value = ioread32(reg); |
|
return value & INOUTEPMPSR_STL_EP ? 1 : 0; |
|
} |
|
|
|
static void fotg210_get_status(struct fotg210_udc *fotg210, |
|
struct usb_ctrlrequest *ctrl) |
|
{ |
|
u8 epnum; |
|
|
|
switch (ctrl->bRequestType & USB_RECIP_MASK) { |
|
case USB_RECIP_DEVICE: |
|
fotg210->ep0_data = 1 << USB_DEVICE_SELF_POWERED; |
|
break; |
|
case USB_RECIP_INTERFACE: |
|
fotg210->ep0_data = 0; |
|
break; |
|
case USB_RECIP_ENDPOINT: |
|
epnum = ctrl->wIndex & USB_ENDPOINT_NUMBER_MASK; |
|
if (epnum) |
|
fotg210->ep0_data = |
|
fotg210_is_epnstall(fotg210->ep[epnum]) |
|
<< USB_ENDPOINT_HALT; |
|
else |
|
fotg210_request_error(fotg210); |
|
break; |
|
|
|
default: |
|
fotg210_request_error(fotg210); |
|
return; /* exit */ |
|
} |
|
|
|
fotg210->ep0_req->buf = &fotg210->ep0_data; |
|
fotg210->ep0_req->length = 2; |
|
|
|
spin_unlock(&fotg210->lock); |
|
fotg210_ep_queue(fotg210->gadget.ep0, fotg210->ep0_req, GFP_ATOMIC); |
|
spin_lock(&fotg210->lock); |
|
} |
|
|
|
static int fotg210_setup_packet(struct fotg210_udc *fotg210, |
|
struct usb_ctrlrequest *ctrl) |
|
{ |
|
u8 *p = (u8 *)ctrl; |
|
u8 ret = 0; |
|
|
|
fotg210_rdsetupp(fotg210, p); |
|
|
|
fotg210->ep[0]->dir_in = ctrl->bRequestType & USB_DIR_IN; |
|
|
|
if (fotg210->gadget.speed == USB_SPEED_UNKNOWN) { |
|
u32 value = ioread32(fotg210->reg + FOTG210_DMCR); |
|
fotg210->gadget.speed = value & DMCR_HS_EN ? |
|
USB_SPEED_HIGH : USB_SPEED_FULL; |
|
} |
|
|
|
/* check request */ |
|
if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { |
|
switch (ctrl->bRequest) { |
|
case USB_REQ_GET_STATUS: |
|
fotg210_get_status(fotg210, ctrl); |
|
break; |
|
case USB_REQ_CLEAR_FEATURE: |
|
fotg210_clear_feature(fotg210, ctrl); |
|
break; |
|
case USB_REQ_SET_FEATURE: |
|
fotg210_set_feature(fotg210, ctrl); |
|
break; |
|
case USB_REQ_SET_ADDRESS: |
|
fotg210_set_address(fotg210, ctrl); |
|
break; |
|
case USB_REQ_SET_CONFIGURATION: |
|
fotg210_set_configuration(fotg210); |
|
ret = 1; |
|
break; |
|
default: |
|
ret = 1; |
|
break; |
|
} |
|
} else { |
|
ret = 1; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static void fotg210_ep0out(struct fotg210_udc *fotg210) |
|
{ |
|
struct fotg210_ep *ep = fotg210->ep[0]; |
|
|
|
if (!list_empty(&ep->queue) && !ep->dir_in) { |
|
struct fotg210_request *req; |
|
|
|
req = list_first_entry(&ep->queue, |
|
struct fotg210_request, queue); |
|
|
|
if (req->req.length) |
|
fotg210_start_dma(ep, req); |
|
|
|
if ((req->req.length - req->req.actual) < ep->ep.maxpacket) |
|
fotg210_done(ep, req, 0); |
|
} else { |
|
pr_err("%s : empty queue\n", __func__); |
|
} |
|
} |
|
|
|
static void fotg210_ep0in(struct fotg210_udc *fotg210) |
|
{ |
|
struct fotg210_ep *ep = fotg210->ep[0]; |
|
|
|
if ((!list_empty(&ep->queue)) && (ep->dir_in)) { |
|
struct fotg210_request *req; |
|
|
|
req = list_entry(ep->queue.next, |
|
struct fotg210_request, queue); |
|
|
|
if (req->req.length) |
|
fotg210_start_dma(ep, req); |
|
|
|
if (req->req.actual == req->req.length) |
|
fotg210_done(ep, req, 0); |
|
} else { |
|
fotg210_set_cxdone(fotg210); |
|
} |
|
} |
|
|
|
static void fotg210_clear_comabt_int(struct fotg210_udc *fotg210) |
|
{ |
|
u32 value = ioread32(fotg210->reg + FOTG210_DISGR0); |
|
|
|
value &= ~DISGR0_CX_COMABT_INT; |
|
iowrite32(value, fotg210->reg + FOTG210_DISGR0); |
|
} |
|
|
|
static void fotg210_in_fifo_handler(struct fotg210_ep *ep) |
|
{ |
|
struct fotg210_request *req = list_entry(ep->queue.next, |
|
struct fotg210_request, queue); |
|
|
|
if (req->req.length) |
|
fotg210_start_dma(ep, req); |
|
fotg210_done(ep, req, 0); |
|
} |
|
|
|
static void fotg210_out_fifo_handler(struct fotg210_ep *ep) |
|
{ |
|
struct fotg210_request *req = list_entry(ep->queue.next, |
|
struct fotg210_request, queue); |
|
int disgr1 = ioread32(ep->fotg210->reg + FOTG210_DISGR1); |
|
|
|
fotg210_start_dma(ep, req); |
|
|
|
/* Complete the request when it's full or a short packet arrived. |
|
* Like other drivers, short_not_ok isn't handled. |
|
*/ |
|
|
|
if (req->req.length == req->req.actual || |
|
(disgr1 & DISGR1_SPK_INT(ep->epnum - 1))) |
|
fotg210_done(ep, req, 0); |
|
} |
|
|
|
static irqreturn_t fotg210_irq(int irq, void *_fotg210) |
|
{ |
|
struct fotg210_udc *fotg210 = _fotg210; |
|
u32 int_grp = ioread32(fotg210->reg + FOTG210_DIGR); |
|
u32 int_msk = ioread32(fotg210->reg + FOTG210_DMIGR); |
|
|
|
int_grp &= ~int_msk; |
|
|
|
spin_lock(&fotg210->lock); |
|
|
|
if (int_grp & DIGR_INT_G2) { |
|
void __iomem *reg = fotg210->reg + FOTG210_DISGR2; |
|
u32 int_grp2 = ioread32(reg); |
|
u32 int_msk2 = ioread32(fotg210->reg + FOTG210_DMISGR2); |
|
u32 value; |
|
|
|
int_grp2 &= ~int_msk2; |
|
|
|
if (int_grp2 & DISGR2_USBRST_INT) { |
|
usb_gadget_udc_reset(&fotg210->gadget, |
|
fotg210->driver); |
|
value = ioread32(reg); |
|
value &= ~DISGR2_USBRST_INT; |
|
iowrite32(value, reg); |
|
pr_info("fotg210 udc reset\n"); |
|
} |
|
if (int_grp2 & DISGR2_SUSP_INT) { |
|
value = ioread32(reg); |
|
value &= ~DISGR2_SUSP_INT; |
|
iowrite32(value, reg); |
|
pr_info("fotg210 udc suspend\n"); |
|
} |
|
if (int_grp2 & DISGR2_RESM_INT) { |
|
value = ioread32(reg); |
|
value &= ~DISGR2_RESM_INT; |
|
iowrite32(value, reg); |
|
pr_info("fotg210 udc resume\n"); |
|
} |
|
if (int_grp2 & DISGR2_ISO_SEQ_ERR_INT) { |
|
value = ioread32(reg); |
|
value &= ~DISGR2_ISO_SEQ_ERR_INT; |
|
iowrite32(value, reg); |
|
pr_info("fotg210 iso sequence error\n"); |
|
} |
|
if (int_grp2 & DISGR2_ISO_SEQ_ABORT_INT) { |
|
value = ioread32(reg); |
|
value &= ~DISGR2_ISO_SEQ_ABORT_INT; |
|
iowrite32(value, reg); |
|
pr_info("fotg210 iso sequence abort\n"); |
|
} |
|
if (int_grp2 & DISGR2_TX0BYTE_INT) { |
|
fotg210_clear_tx0byte(fotg210); |
|
value = ioread32(reg); |
|
value &= ~DISGR2_TX0BYTE_INT; |
|
iowrite32(value, reg); |
|
pr_info("fotg210 transferred 0 byte\n"); |
|
} |
|
if (int_grp2 & DISGR2_RX0BYTE_INT) { |
|
fotg210_clear_rx0byte(fotg210); |
|
value = ioread32(reg); |
|
value &= ~DISGR2_RX0BYTE_INT; |
|
iowrite32(value, reg); |
|
pr_info("fotg210 received 0 byte\n"); |
|
} |
|
if (int_grp2 & DISGR2_DMA_ERROR) { |
|
value = ioread32(reg); |
|
value &= ~DISGR2_DMA_ERROR; |
|
iowrite32(value, reg); |
|
} |
|
} |
|
|
|
if (int_grp & DIGR_INT_G0) { |
|
void __iomem *reg = fotg210->reg + FOTG210_DISGR0; |
|
u32 int_grp0 = ioread32(reg); |
|
u32 int_msk0 = ioread32(fotg210->reg + FOTG210_DMISGR0); |
|
struct usb_ctrlrequest ctrl; |
|
|
|
int_grp0 &= ~int_msk0; |
|
|
|
/* the highest priority in this source register */ |
|
if (int_grp0 & DISGR0_CX_COMABT_INT) { |
|
fotg210_clear_comabt_int(fotg210); |
|
pr_info("fotg210 CX command abort\n"); |
|
} |
|
|
|
if (int_grp0 & DISGR0_CX_SETUP_INT) { |
|
if (fotg210_setup_packet(fotg210, &ctrl)) { |
|
spin_unlock(&fotg210->lock); |
|
if (fotg210->driver->setup(&fotg210->gadget, |
|
&ctrl) < 0) |
|
fotg210_set_cxstall(fotg210); |
|
spin_lock(&fotg210->lock); |
|
} |
|
} |
|
if (int_grp0 & DISGR0_CX_COMEND_INT) |
|
pr_info("fotg210 cmd end\n"); |
|
|
|
if (int_grp0 & DISGR0_CX_IN_INT) |
|
fotg210_ep0in(fotg210); |
|
|
|
if (int_grp0 & DISGR0_CX_OUT_INT) |
|
fotg210_ep0out(fotg210); |
|
|
|
if (int_grp0 & DISGR0_CX_COMFAIL_INT) { |
|
fotg210_set_cxstall(fotg210); |
|
pr_info("fotg210 ep0 fail\n"); |
|
} |
|
} |
|
|
|
if (int_grp & DIGR_INT_G1) { |
|
void __iomem *reg = fotg210->reg + FOTG210_DISGR1; |
|
u32 int_grp1 = ioread32(reg); |
|
u32 int_msk1 = ioread32(fotg210->reg + FOTG210_DMISGR1); |
|
int fifo; |
|
|
|
int_grp1 &= ~int_msk1; |
|
|
|
for (fifo = 0; fifo < FOTG210_MAX_FIFO_NUM; fifo++) { |
|
if (int_grp1 & DISGR1_IN_INT(fifo)) |
|
fotg210_in_fifo_handler(fotg210->ep[fifo + 1]); |
|
|
|
if ((int_grp1 & DISGR1_OUT_INT(fifo)) || |
|
(int_grp1 & DISGR1_SPK_INT(fifo))) |
|
fotg210_out_fifo_handler(fotg210->ep[fifo + 1]); |
|
} |
|
} |
|
|
|
spin_unlock(&fotg210->lock); |
|
|
|
return IRQ_HANDLED; |
|
} |
|
|
|
static void fotg210_disable_unplug(struct fotg210_udc *fotg210) |
|
{ |
|
u32 reg = ioread32(fotg210->reg + FOTG210_PHYTMSR); |
|
|
|
reg &= ~PHYTMSR_UNPLUG; |
|
iowrite32(reg, fotg210->reg + FOTG210_PHYTMSR); |
|
} |
|
|
|
static int fotg210_udc_start(struct usb_gadget *g, |
|
struct usb_gadget_driver *driver) |
|
{ |
|
struct fotg210_udc *fotg210 = gadget_to_fotg210(g); |
|
u32 value; |
|
|
|
/* hook up the driver */ |
|
driver->driver.bus = NULL; |
|
fotg210->driver = driver; |
|
|
|
/* enable device global interrupt */ |
|
value = ioread32(fotg210->reg + FOTG210_DMCR); |
|
value |= DMCR_GLINT_EN; |
|
iowrite32(value, fotg210->reg + FOTG210_DMCR); |
|
|
|
return 0; |
|
} |
|
|
|
static void fotg210_init(struct fotg210_udc *fotg210) |
|
{ |
|
u32 value; |
|
|
|
/* disable global interrupt and set int polarity to active high */ |
|
iowrite32(GMIR_MHC_INT | GMIR_MOTG_INT | GMIR_INT_POLARITY, |
|
fotg210->reg + FOTG210_GMIR); |
|
|
|
/* disable device global interrupt */ |
|
value = ioread32(fotg210->reg + FOTG210_DMCR); |
|
value &= ~DMCR_GLINT_EN; |
|
iowrite32(value, fotg210->reg + FOTG210_DMCR); |
|
|
|
/* enable only grp2 irqs we handle */ |
|
iowrite32(~(DISGR2_DMA_ERROR | DISGR2_RX0BYTE_INT | DISGR2_TX0BYTE_INT |
|
| DISGR2_ISO_SEQ_ABORT_INT | DISGR2_ISO_SEQ_ERR_INT |
|
| DISGR2_RESM_INT | DISGR2_SUSP_INT | DISGR2_USBRST_INT), |
|
fotg210->reg + FOTG210_DMISGR2); |
|
|
|
/* disable all fifo interrupt */ |
|
iowrite32(~(u32)0, fotg210->reg + FOTG210_DMISGR1); |
|
|
|
/* disable cmd end */ |
|
value = ioread32(fotg210->reg + FOTG210_DMISGR0); |
|
value |= DMISGR0_MCX_COMEND; |
|
iowrite32(value, fotg210->reg + FOTG210_DMISGR0); |
|
} |
|
|
|
static int fotg210_udc_stop(struct usb_gadget *g) |
|
{ |
|
struct fotg210_udc *fotg210 = gadget_to_fotg210(g); |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&fotg210->lock, flags); |
|
|
|
fotg210_init(fotg210); |
|
fotg210->driver = NULL; |
|
|
|
spin_unlock_irqrestore(&fotg210->lock, flags); |
|
|
|
return 0; |
|
} |
|
|
|
static const struct usb_gadget_ops fotg210_gadget_ops = { |
|
.udc_start = fotg210_udc_start, |
|
.udc_stop = fotg210_udc_stop, |
|
}; |
|
|
|
static int fotg210_udc_remove(struct platform_device *pdev) |
|
{ |
|
struct fotg210_udc *fotg210 = platform_get_drvdata(pdev); |
|
int i; |
|
|
|
usb_del_gadget_udc(&fotg210->gadget); |
|
iounmap(fotg210->reg); |
|
free_irq(platform_get_irq(pdev, 0), fotg210); |
|
|
|
fotg210_ep_free_request(&fotg210->ep[0]->ep, fotg210->ep0_req); |
|
for (i = 0; i < FOTG210_MAX_NUM_EP; i++) |
|
kfree(fotg210->ep[i]); |
|
kfree(fotg210); |
|
|
|
return 0; |
|
} |
|
|
|
static int fotg210_udc_probe(struct platform_device *pdev) |
|
{ |
|
struct resource *res, *ires; |
|
struct fotg210_udc *fotg210 = NULL; |
|
struct fotg210_ep *_ep[FOTG210_MAX_NUM_EP]; |
|
int ret = 0; |
|
int i; |
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
|
if (!res) { |
|
pr_err("platform_get_resource error.\n"); |
|
return -ENODEV; |
|
} |
|
|
|
ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
|
if (!ires) { |
|
pr_err("platform_get_resource IORESOURCE_IRQ error.\n"); |
|
return -ENODEV; |
|
} |
|
|
|
ret = -ENOMEM; |
|
|
|
/* initialize udc */ |
|
fotg210 = kzalloc(sizeof(struct fotg210_udc), GFP_KERNEL); |
|
if (fotg210 == NULL) |
|
goto err; |
|
|
|
for (i = 0; i < FOTG210_MAX_NUM_EP; i++) { |
|
_ep[i] = kzalloc(sizeof(struct fotg210_ep), GFP_KERNEL); |
|
if (_ep[i] == NULL) |
|
goto err_alloc; |
|
fotg210->ep[i] = _ep[i]; |
|
} |
|
|
|
fotg210->reg = ioremap(res->start, resource_size(res)); |
|
if (fotg210->reg == NULL) { |
|
pr_err("ioremap error.\n"); |
|
goto err_alloc; |
|
} |
|
|
|
spin_lock_init(&fotg210->lock); |
|
|
|
platform_set_drvdata(pdev, fotg210); |
|
|
|
fotg210->gadget.ops = &fotg210_gadget_ops; |
|
|
|
fotg210->gadget.max_speed = USB_SPEED_HIGH; |
|
fotg210->gadget.dev.parent = &pdev->dev; |
|
fotg210->gadget.dev.dma_mask = pdev->dev.dma_mask; |
|
fotg210->gadget.name = udc_name; |
|
|
|
INIT_LIST_HEAD(&fotg210->gadget.ep_list); |
|
|
|
for (i = 0; i < FOTG210_MAX_NUM_EP; i++) { |
|
struct fotg210_ep *ep = fotg210->ep[i]; |
|
|
|
if (i) { |
|
INIT_LIST_HEAD(&fotg210->ep[i]->ep.ep_list); |
|
list_add_tail(&fotg210->ep[i]->ep.ep_list, |
|
&fotg210->gadget.ep_list); |
|
} |
|
ep->fotg210 = fotg210; |
|
INIT_LIST_HEAD(&ep->queue); |
|
ep->ep.name = fotg210_ep_name[i]; |
|
ep->ep.ops = &fotg210_ep_ops; |
|
usb_ep_set_maxpacket_limit(&ep->ep, (unsigned short) ~0); |
|
|
|
if (i == 0) { |
|
ep->ep.caps.type_control = true; |
|
} else { |
|
ep->ep.caps.type_iso = true; |
|
ep->ep.caps.type_bulk = true; |
|
ep->ep.caps.type_int = true; |
|
} |
|
|
|
ep->ep.caps.dir_in = true; |
|
ep->ep.caps.dir_out = true; |
|
} |
|
usb_ep_set_maxpacket_limit(&fotg210->ep[0]->ep, 0x40); |
|
fotg210->gadget.ep0 = &fotg210->ep[0]->ep; |
|
INIT_LIST_HEAD(&fotg210->gadget.ep0->ep_list); |
|
|
|
fotg210->ep0_req = fotg210_ep_alloc_request(&fotg210->ep[0]->ep, |
|
GFP_KERNEL); |
|
if (fotg210->ep0_req == NULL) |
|
goto err_map; |
|
|
|
fotg210_init(fotg210); |
|
|
|
fotg210_disable_unplug(fotg210); |
|
|
|
ret = request_irq(ires->start, fotg210_irq, IRQF_SHARED, |
|
udc_name, fotg210); |
|
if (ret < 0) { |
|
pr_err("request_irq error (%d)\n", ret); |
|
goto err_req; |
|
} |
|
|
|
ret = usb_add_gadget_udc(&pdev->dev, &fotg210->gadget); |
|
if (ret) |
|
goto err_add_udc; |
|
|
|
dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION); |
|
|
|
return 0; |
|
|
|
err_add_udc: |
|
free_irq(ires->start, fotg210); |
|
|
|
err_req: |
|
fotg210_ep_free_request(&fotg210->ep[0]->ep, fotg210->ep0_req); |
|
|
|
err_map: |
|
iounmap(fotg210->reg); |
|
|
|
err_alloc: |
|
for (i = 0; i < FOTG210_MAX_NUM_EP; i++) |
|
kfree(fotg210->ep[i]); |
|
kfree(fotg210); |
|
|
|
err: |
|
return ret; |
|
} |
|
|
|
static struct platform_driver fotg210_driver = { |
|
.driver = { |
|
.name = udc_name, |
|
}, |
|
.probe = fotg210_udc_probe, |
|
.remove = fotg210_udc_remove, |
|
}; |
|
|
|
module_platform_driver(fotg210_driver); |
|
|
|
MODULE_AUTHOR("Yuan-Hsin Chen, Feng-Hsin Chiang <[email protected]>"); |
|
MODULE_LICENSE("GPL"); |
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
|