--- /dev/null
+/*
+ * 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 */
+ if (req->req.length) {
+ fotg210_start_dma(ep, req);
+ } else {
+ pr_err("%s : req->req.length = 0x%x\n",
+ __func__, req->req.length);
+ }
+ if ((req->req.length == req->req.actual) ||
+ (req->req.actual < ep->ep.maxpacket))
+ fotg210_done(ep, req, 0);
+ } else { /* OUT */
+ if (!req->req.length) {
+ fotg210_done(ep, req, 0);
+ } else {
+ 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);
+
+ 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);
+ 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_alloc;
+
+ 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_map;
+ }
+
+ 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);
+ }
+ 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_req;
+
+ 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_irq;
+ }
+
+ 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:
+err_irq:
+ free_irq(ires->start, fotg210);
+
+err_req:
+ fotg210_ep_free_request(&fotg210->ep[0]->ep, fotg210->ep0_req);
+
+err_map:
+ if (fotg210->reg)
+ iounmap(fotg210->reg);
+
+err_alloc:
+ kfree(fotg210);
+
+ 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);
Code Review / kvmfornfv.git / blobdiff