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- /*
- * FOTG210 UDC Driver supports Bulk transfer so far
- *
- * Copyright (C) 2013 Faraday Technology Corporation
- *
- * Author : Yuan-Hsin Chen <yhchen@faraday-tech.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- */
- #include <linux/dma-mapping.h>
- #include <linux/err.h>
- #include <linux/interrupt.h>
- #include <linux/io.h>
- #include <linux/module.h>
- #include <linux/platform_device.h>
- #include <linux/usb/ch9.h>
- #include <linux/usb/gadget.h>
- #include "fotg210.h"
- #define DRIVER_DESC "FOTG210 USB Device Controller Driver"
- #define DRIVER_VERSION "30-April-2013"
- static const char udc_name[] = "fotg210_udc";
- static const char * const fotg210_ep_name[] = {
- "ep0", "ep1", "ep2", "ep3", "ep4"};
- static void fotg210_disable_fifo_int(struct fotg210_ep *ep)
- {
- u32 value = ioread32(ep->fotg210->reg + FOTG210_DMISGR1);
- if (ep->dir_in)
- value |= DMISGR1_MF_IN_INT(ep->epnum - 1);
- else
- value |= DMISGR1_MF_OUTSPK_INT(ep->epnum - 1);
- iowrite32(value, ep->fotg210->reg + FOTG210_DMISGR1);
- }
- static void fotg210_enable_fifo_int(struct fotg210_ep *ep)
- {
- u32 value = ioread32(ep->fotg210->reg + FOTG210_DMISGR1);
- if (ep->dir_in)
- value &= ~DMISGR1_MF_IN_INT(ep->epnum - 1);
- else
- value &= ~DMISGR1_MF_OUTSPK_INT(ep->epnum - 1);
- iowrite32(value, ep->fotg210->reg + FOTG210_DMISGR1);
- }
- static void fotg210_set_cxdone(struct fotg210_udc *fotg210)
- {
- u32 value = ioread32(fotg210->reg + FOTG210_DCFESR);
- value |= DCFESR_CX_DONE;
- iowrite32(value, fotg210->reg + FOTG210_DCFESR);
- }
- static void fotg210_done(struct fotg210_ep *ep, struct fotg210_request *req,
- int status)
- {
- list_del_init(&req->queue);
- /* don't modify queue heads during completion callback */
- if (ep->fotg210->gadget.speed == USB_SPEED_UNKNOWN)
- req->req.status = -ESHUTDOWN;
- else
- req->req.status = status;
- spin_unlock(&ep->fotg210->lock);
- usb_gadget_giveback_request(&ep->ep, &req->req);
- spin_lock(&ep->fotg210->lock);
- if (ep->epnum) {
- if (list_empty(&ep->queue))
- fotg210_disable_fifo_int(ep);
- } else {
- fotg210_set_cxdone(ep->fotg210);
- }
- }
- static void fotg210_fifo_ep_mapping(struct fotg210_ep *ep, u32 epnum,
- u32 dir_in)
- {
- struct fotg210_udc *fotg210 = ep->fotg210;
- u32 val;
- /* Driver should map an ep to a fifo and then map the fifo
- * to the ep. What a brain-damaged design!
- */
- /* map a fifo to an ep */
- val = ioread32(fotg210->reg + FOTG210_EPMAP);
- val &= ~EPMAP_FIFONOMSK(epnum, dir_in);
- val |= EPMAP_FIFONO(epnum, dir_in);
- iowrite32(val, fotg210->reg + FOTG210_EPMAP);
- /* map the ep to the fifo */
- val = ioread32(fotg210->reg + FOTG210_FIFOMAP);
- val &= ~FIFOMAP_EPNOMSK(epnum);
- val |= FIFOMAP_EPNO(epnum);
- iowrite32(val, fotg210->reg + FOTG210_FIFOMAP);
- /* enable fifo */
- val = ioread32(fotg210->reg + FOTG210_FIFOCF);
- val |= FIFOCF_FIFO_EN(epnum - 1);
- iowrite32(val, fotg210->reg + FOTG210_FIFOCF);
- }
- static void fotg210_set_fifo_dir(struct fotg210_ep *ep, u32 epnum, u32 dir_in)
- {
- struct fotg210_udc *fotg210 = ep->fotg210;
- u32 val;
- val = ioread32(fotg210->reg + FOTG210_FIFOMAP);
- val |= (dir_in ? FIFOMAP_DIRIN(epnum - 1) : FIFOMAP_DIROUT(epnum - 1));
- iowrite32(val, fotg210->reg + FOTG210_FIFOMAP);
- }
- static void fotg210_set_tfrtype(struct fotg210_ep *ep, u32 epnum, u32 type)
- {
- struct fotg210_udc *fotg210 = ep->fotg210;
- u32 val;
- val = ioread32(fotg210->reg + FOTG210_FIFOCF);
- val |= FIFOCF_TYPE(type, epnum - 1);
- iowrite32(val, fotg210->reg + FOTG210_FIFOCF);
- }
- static void fotg210_set_mps(struct fotg210_ep *ep, u32 epnum, u32 mps,
- u32 dir_in)
- {
- struct fotg210_udc *fotg210 = ep->fotg210;
- u32 val;
- u32 offset = dir_in ? FOTG210_INEPMPSR(epnum) :
- FOTG210_OUTEPMPSR(epnum);
- val = ioread32(fotg210->reg + offset);
- val |= INOUTEPMPSR_MPS(mps);
- iowrite32(val, fotg210->reg + offset);
- }
- static int fotg210_config_ep(struct fotg210_ep *ep,
- const struct usb_endpoint_descriptor *desc)
- {
- struct fotg210_udc *fotg210 = ep->fotg210;
- fotg210_set_fifo_dir(ep, ep->epnum, ep->dir_in);
- fotg210_set_tfrtype(ep, ep->epnum, ep->type);
- fotg210_set_mps(ep, ep->epnum, ep->ep.maxpacket, ep->dir_in);
- fotg210_fifo_ep_mapping(ep, ep->epnum, ep->dir_in);
- fotg210->ep[ep->epnum] = ep;
- return 0;
- }
- static int fotg210_ep_enable(struct usb_ep *_ep,
- const struct usb_endpoint_descriptor *desc)
- {
- struct fotg210_ep *ep;
- ep = container_of(_ep, struct fotg210_ep, ep);
- ep->desc = desc;
- ep->epnum = usb_endpoint_num(desc);
- ep->type = usb_endpoint_type(desc);
- ep->dir_in = usb_endpoint_dir_in(desc);
- ep->ep.maxpacket = usb_endpoint_maxp(desc);
- return fotg210_config_ep(ep, desc);
- }
- static void fotg210_reset_tseq(struct fotg210_udc *fotg210, u8 epnum)
- {
- struct fotg210_ep *ep = fotg210->ep[epnum];
- u32 value;
- void __iomem *reg;
- reg = (ep->dir_in) ?
- fotg210->reg + FOTG210_INEPMPSR(epnum) :
- fotg210->reg + FOTG210_OUTEPMPSR(epnum);
- /* Note: Driver needs to set and clear INOUTEPMPSR_RESET_TSEQ
- * bit. Controller wouldn't clear this bit. WTF!!!
- */
- value = ioread32(reg);
- value |= INOUTEPMPSR_RESET_TSEQ;
- iowrite32(value, reg);
- value = ioread32(reg);
- value &= ~INOUTEPMPSR_RESET_TSEQ;
- iowrite32(value, reg);
- }
- static int fotg210_ep_release(struct fotg210_ep *ep)
- {
- if (!ep->epnum)
- return 0;
- ep->epnum = 0;
- ep->stall = 0;
- ep->wedged = 0;
- fotg210_reset_tseq(ep->fotg210, ep->epnum);
- return 0;
- }
- static int fotg210_ep_disable(struct usb_ep *_ep)
- {
- struct fotg210_ep *ep;
- struct fotg210_request *req;
- unsigned long flags;
- BUG_ON(!_ep);
- ep = container_of(_ep, struct fotg210_ep, ep);
- while (!list_empty(&ep->queue)) {
- req = list_entry(ep->queue.next,
- struct fotg210_request, queue);
- spin_lock_irqsave(&ep->fotg210->lock, flags);
- fotg210_done(ep, req, -ECONNRESET);
- spin_unlock_irqrestore(&ep->fotg210->lock, flags);
- }
- return fotg210_ep_release(ep);
- }
- static struct usb_request *fotg210_ep_alloc_request(struct usb_ep *_ep,
- gfp_t gfp_flags)
- {
- struct fotg210_request *req;
- req = kzalloc(sizeof(struct fotg210_request), gfp_flags);
- if (!req)
- return NULL;
- INIT_LIST_HEAD(&req->queue);
- return &req->req;
- }
- static void fotg210_ep_free_request(struct usb_ep *_ep,
- struct usb_request *_req)
- {
- struct fotg210_request *req;
- req = container_of(_req, struct fotg210_request, req);
- kfree(req);
- }
- static void fotg210_enable_dma(struct fotg210_ep *ep,
- dma_addr_t d, u32 len)
- {
- u32 value;
- struct fotg210_udc *fotg210 = ep->fotg210;
- /* set transfer length and direction */
- value = ioread32(fotg210->reg + FOTG210_DMACPSR1);
- value &= ~(DMACPSR1_DMA_LEN(0xFFFF) | DMACPSR1_DMA_TYPE(1));
- value |= DMACPSR1_DMA_LEN(len) | DMACPSR1_DMA_TYPE(ep->dir_in);
- iowrite32(value, fotg210->reg + FOTG210_DMACPSR1);
- /* set device DMA target FIFO number */
- value = ioread32(fotg210->reg + FOTG210_DMATFNR);
- if (ep->epnum)
- value |= DMATFNR_ACC_FN(ep->epnum - 1);
- else
- value |= DMATFNR_ACC_CXF;
- iowrite32(value, fotg210->reg + FOTG210_DMATFNR);
- /* set DMA memory address */
- iowrite32(d, fotg210->reg + FOTG210_DMACPSR2);
- /* enable MDMA_EROR and MDMA_CMPLT interrupt */
- value = ioread32(fotg210->reg + FOTG210_DMISGR2);
- value &= ~(DMISGR2_MDMA_CMPLT | DMISGR2_MDMA_ERROR);
- iowrite32(value, fotg210->reg + FOTG210_DMISGR2);
- /* start DMA */
- value = ioread32(fotg210->reg + FOTG210_DMACPSR1);
- value |= DMACPSR1_DMA_START;
- iowrite32(value, fotg210->reg + FOTG210_DMACPSR1);
- }
- static void fotg210_disable_dma(struct fotg210_ep *ep)
- {
- iowrite32(DMATFNR_DISDMA, ep->fotg210->reg + FOTG210_DMATFNR);
- }
- static void fotg210_wait_dma_done(struct fotg210_ep *ep)
- {
- u32 value;
- do {
- value = ioread32(ep->fotg210->reg + FOTG210_DISGR2);
- if ((value & DISGR2_USBRST_INT) ||
- (value & DISGR2_DMA_ERROR))
- goto dma_reset;
- } while (!(value & DISGR2_DMA_CMPLT));
- value &= ~DISGR2_DMA_CMPLT;
- iowrite32(value, ep->fotg210->reg + FOTG210_DISGR2);
- return;
- dma_reset:
- value = ioread32(ep->fotg210->reg + FOTG210_DMACPSR1);
- value |= DMACPSR1_DMA_ABORT;
- iowrite32(value, ep->fotg210->reg + FOTG210_DMACPSR1);
- /* reset fifo */
- if (ep->epnum) {
- value = ioread32(ep->fotg210->reg +
- FOTG210_FIBCR(ep->epnum - 1));
- value |= FIBCR_FFRST;
- iowrite32(value, ep->fotg210->reg +
- FOTG210_FIBCR(ep->epnum - 1));
- } else {
- value = ioread32(ep->fotg210->reg + FOTG210_DCFESR);
- value |= DCFESR_CX_CLR;
- iowrite32(value, ep->fotg210->reg + FOTG210_DCFESR);
- }
- }
- static void fotg210_start_dma(struct fotg210_ep *ep,
- struct fotg210_request *req)
- {
- dma_addr_t d;
- u8 *buffer;
- u32 length;
- if (ep->epnum) {
- if (ep->dir_in) {
- buffer = req->req.buf;
- length = req->req.length;
- } else {
- buffer = req->req.buf + req->req.actual;
- length = ioread32(ep->fotg210->reg +
- FOTG210_FIBCR(ep->epnum - 1));
- length &= FIBCR_BCFX;
- }
- } else {
- buffer = req->req.buf + req->req.actual;
- if (req->req.length - req->req.actual > ep->ep.maxpacket)
- length = ep->ep.maxpacket;
- else
- length = req->req.length;
- }
- d = dma_map_single(NULL, buffer, length,
- ep->dir_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
- if (dma_mapping_error(NULL, d)) {
- pr_err("dma_mapping_error\n");
- return;
- }
- dma_sync_single_for_device(NULL, d, length,
- ep->dir_in ? DMA_TO_DEVICE :
- DMA_FROM_DEVICE);
- fotg210_enable_dma(ep, d, length);
- /* check if dma is done */
- fotg210_wait_dma_done(ep);
- fotg210_disable_dma(ep);
- /* update actual transfer length */
- req->req.actual += length;
- dma_unmap_single(NULL, d, length, DMA_TO_DEVICE);
- }
- static void fotg210_ep0_queue(struct fotg210_ep *ep,
- struct fotg210_request *req)
- {
- if (!req->req.length) {
- fotg210_done(ep, req, 0);
- return;
- }
- if (ep->dir_in) { /* if IN */
- fotg210_start_dma(ep, req);
- if ((req->req.length == req->req.actual) ||
- (req->req.actual < ep->ep.maxpacket))
- fotg210_done(ep, req, 0);
- } else { /* OUT */
- u32 value = ioread32(ep->fotg210->reg + FOTG210_DMISGR0);
- value &= ~DMISGR0_MCX_OUT_INT;
- iowrite32(value, ep->fotg210->reg + FOTG210_DMISGR0);
- }
- }
- static int fotg210_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
- gfp_t gfp_flags)
- {
- struct fotg210_ep *ep;
- struct fotg210_request *req;
- unsigned long flags;
- int request = 0;
- ep = container_of(_ep, struct fotg210_ep, ep);
- req = container_of(_req, struct fotg210_request, req);
- if (ep->fotg210->gadget.speed == USB_SPEED_UNKNOWN)
- return -ESHUTDOWN;
- spin_lock_irqsave(&ep->fotg210->lock, flags);
- if (list_empty(&ep->queue))
- request = 1;
- list_add_tail(&req->queue, &ep->queue);
- req->req.actual = 0;
- req->req.status = -EINPROGRESS;
- if (!ep->epnum) /* ep0 */
- fotg210_ep0_queue(ep, req);
- else if (request && !ep->stall)
- fotg210_enable_fifo_int(ep);
- spin_unlock_irqrestore(&ep->fotg210->lock, flags);
- return 0;
- }
- static int fotg210_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
- {
- struct fotg210_ep *ep;
- struct fotg210_request *req;
- unsigned long flags;
- ep = container_of(_ep, struct fotg210_ep, ep);
- req = container_of(_req, struct fotg210_request, req);
- spin_lock_irqsave(&ep->fotg210->lock, flags);
- if (!list_empty(&ep->queue))
- fotg210_done(ep, req, -ECONNRESET);
- spin_unlock_irqrestore(&ep->fotg210->lock, flags);
- return 0;
- }
- static void fotg210_set_epnstall(struct fotg210_ep *ep)
- {
- struct fotg210_udc *fotg210 = ep->fotg210;
- u32 value;
- void __iomem *reg;
- /* check if IN FIFO is empty before stall */
- if (ep->dir_in) {
- do {
- value = ioread32(fotg210->reg + FOTG210_DCFESR);
- } while (!(value & DCFESR_FIFO_EMPTY(ep->epnum - 1)));
- }
- 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 void fotg210_clear_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);
- 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;
- int ret = 0;
- 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 ret;
- }
- 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 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_KERNEL);
- 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.length - req->req.actual) < ep->ep.maxpacket)
- 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);
- fotg210_start_dma(ep, req);
- /* finish out transfer */
- if (req->req.length == req->req.actual ||
- req->req.actual < ep->ep.maxpacket)
- 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);
- /* 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 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 = (char *)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);
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