1223 lines
29 KiB
C
1223 lines
29 KiB
C
// 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 <yhchen@faraday-tech.com>
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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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/* 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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/* 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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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;
|
|
void __iomem *reg;
|
|
|
|
reg = (ep->dir_in) ?
|
|
fotg210->reg + FOTG210_INEPMPSR(ep->epnum) :
|
|
fotg210->reg + FOTG210_OUTEPMPSR(ep->epnum);
|
|
value = ioread32(reg);
|
|
value &= ~INOUTEPMPSR_STL_EP;
|
|
iowrite32(value, reg);
|
|
}
|
|
|
|
static int fotg210_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedge)
|
|
{
|
|
struct fotg210_ep *ep;
|
|
struct fotg210_udc *fotg210;
|
|
unsigned long flags;
|
|
|
|
ep = container_of(_ep, struct fotg210_ep, ep);
|
|
|
|
fotg210 = ep->fotg210;
|
|
|
|
spin_lock_irqsave(&ep->fotg210->lock, flags);
|
|
|
|
if (value) {
|
|
fotg210_set_epnstall(ep);
|
|
ep->stall = 1;
|
|
if (wedge)
|
|
ep->wedged = 1;
|
|
} else {
|
|
fotg210_reset_tseq(fotg210, ep->epnum);
|
|
fotg210_clear_epnstall(ep);
|
|
ep->stall = 0;
|
|
ep->wedged = 0;
|
|
if (!list_empty(&ep->queue))
|
|
fotg210_enable_fifo_int(ep);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&ep->fotg210->lock, flags);
|
|
return 0;
|
|
}
|
|
|
|
static int fotg210_ep_set_halt(struct usb_ep *_ep, int value)
|
|
{
|
|
return fotg210_set_halt_and_wedge(_ep, value, 0);
|
|
}
|
|
|
|
static int fotg210_ep_set_wedge(struct usb_ep *_ep)
|
|
{
|
|
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) {
|
|
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 <john453@faraday-tech.com>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|