[U-Boot] [PATCH v4 2/2] usb: gadget: add Faraday FOTG210 USB gadget support

Kuo-Jung Su
2013-05-07T06:26:10Z

The Faraday FOTG210 is an OTG chip which could operate
as either an EHCI Host or a USB Device as a time.

Signed-off-by: Kuo-Jung Su <dantesu@faraday-tech.com>
CC: Marek Vasut <marex@denx.de>
---
Changes for v4:
- Use only macro constants and named bit/mask
- Remove dcache_enable() from usb_gadget_register_driver()

Changes for v3:
- Coding Style cleanup.
- Drop bit fields from c struct.
- Drop macros for wirtel()/readl(), call them directly.
- Always insert a blank line between declarations and code.
- Replace all the infinite wait loop with a timeout.
- Add '__iomem' to all the declaration of HW register pointers.

Changes for v2:
- Coding Style cleanup.
- Use readl(), writel(), clrsetbits_le32() to replace REG() macros.
- Use structure based hardware registers to replace the macro constants.
- Replace BIT() with BIT_MASK().
- echi-faraday: Remove debug codes.

drivers/usb/gadget/Makefile | 1 +
drivers/usb/gadget/fotg210.c | 961 +++++++++++++++++++++++++++++++++++++
drivers/usb/gadget/gadget_chips.h | 8 +
3 files changed, 970 insertions(+)
create mode 100644 drivers/usb/gadget/fotg210.c

diff --git a/drivers/usb/gadget/Makefile b/drivers/usb/gadget/Makefile
index e545b6b..432cf17 100644
--- a/drivers/usb/gadget/Makefile
+++ b/drivers/usb/gadget/Makefile
@@ -35,6 +35,7 @@ endif
# new USB gadget layer dependencies
ifdef CONFIG_USB_GADGET
COBJS-$(CONFIG_USB_GADGET_S3C_UDC_OTG) += s3c_udc_otg.o
+COBJS-$(CONFIG_USB_GADGET_FOTG210) += fotg210.o
COBJS-$(CONFIG_USBDOWNLOAD_GADGET) += g_dnl.o
COBJS-$(CONFIG_DFU_FUNCTION) += f_dfu.o
endif
diff --git a/drivers/usb/gadget/fotg210.c b/drivers/usb/gadget/fotg210.c
new file mode 100644
index 0000000..70797ae
--- /dev/null
+++ b/drivers/usb/gadget/fotg210.c
@@ -0,0 +1,961 @@
+/*
+ * Faraday USB 2.0 OTG Controller
+ *
+ * (C) Copyright 2010 Faraday Technology
+ * Dante Su <dantesu@faraday-tech.com>
+ *
+ * This file is released under the terms of GPL v2 and any later version.
+ * See the file COPYING in the root directory of the source tree for details.
+ */
+
+#include <common.h>
+#include <command.h>
+#include <config.h>
+#include <net.h>
+#include <malloc.h>
+#include <asm/io.h>
+#include <asm/errno.h>
+#include <linux/types.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+
+#include <usb/fotg210.h>
+
+#define CFG_NUM_ENDPOINTS 4
+#define CFG_EP0_MAX_PACKET_SIZE 64
+#define CFG_EPX_MAX_PACKET_SIZE 512
+
+#define CFG_CMD_TIMEOUT (CONFIG_SYS_HZ >> 2) /* 250 ms */
+#define CFG_RST_TIMEOUT (CONFIG_SYS_HZ >> 2) /* 250 ms */
+
+struct fotg210_chip;
+
+struct fotg210_ep {
+ struct usb_ep ep;
+
+ uint maxpacket;
+ uint id;
+ uint stopped;
+
+ struct list_head queue;
+ struct fotg210_chip *chip;
+ const struct usb_endpoint_descriptor *desc;
+};
+
+struct fotg210_request {
+ struct usb_request req;
+ struct list_head queue;
+ struct fotg210_ep *ep;
+};
+
+struct fotg210_chip {
+ struct usb_gadget gadget;
+ struct usb_gadget_driver *driver;
+ struct fotg210_regs __iomem *regs;
+ uint8_t irq;
+ uint16_t addr;
+ int pullup;
+ enum usb_device_state state;
+ struct fotg210_ep ep[1 + CFG_NUM_ENDPOINTS];
+};
+
+static struct usb_endpoint_descriptor ep0_desc = {
+ .bLength = sizeof(struct usb_endpoint_descriptor),
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
+};
+
+static inline int fifo_to_ep(struct fotg210_chip *chip, int id, int in)
+{
+ return (id < 0) ? 0 : ((id % 4) + 1);
+}
+
+static inline int ep_to_fifo(struct fotg210_chip *chip, int id)
+{
+ return (id <= 0) ? -1 : ((id - 1) % 4);
+}
+
+static inline int ep_reset(struct fotg210_chip *chip, uint8_t ep_addr)
+{
+ int ep = ep_addr & USB_ENDPOINT_NUMBER_MASK;
+ struct fotg210_regs __iomem *regs = chip->regs;
+
+ if (ep_addr & USB_DIR_IN) {
+ /* reset endpoint */
+ setbits_le32(&regs->iep[ep - 1], IEP_RESET);
+ mdelay(1);
+ clrbits_le32(&regs->iep[ep - 1], IEP_RESET);
+ /* clear endpoint stall */
+ clrbits_le32(&regs->iep[ep - 1], IEP_STALL);
+ } else {
+ /* reset endpoint */
+ setbits_le32(&regs->oep[ep - 1], OEP_RESET);
+ mdelay(1);
+ clrbits_le32(&regs->oep[ep - 1], OEP_RESET);
+ /* clear endpoint stall */
+ clrbits_le32(&regs->oep[ep - 1], OEP_STALL);
+ }
+
+ return 0;
+}
+
+static int fotg210_reset(struct fotg210_chip *chip)
+{
+ struct fotg210_regs __iomem *regs = chip->regs;
+ uint32_t i, ts;
+
+ chip->state = USB_STATE_POWERED;
+
+ /* chip enable */
+ writel(DEVCTRL_EN, &regs->dev_ctrl);
+
+ /* device address reset */
+ chip->addr = 0;
+ writel(chip->addr, &regs->dev_addr);
+
+ /* set idle counter to 7ms */
+ writel(7, &regs->idle);
+
+ /* disable interrupts */
+ writel(0x0f, &regs->imr);
+ writel(0x07, &regs->gimr);
+ writel(0x3f, &regs->gimr0);
+ writel(0xf00ff, &regs->gimr1);
+ writel(0x7ff, &regs->gimr2);
+
+ /* clear interrupts */
+ writel(0x07, &regs->isr);
+ writel(0x00, &regs->gisr);
+ writel(0x00, &regs->gisr0);
+ writel(0x00, &regs->gisr1);
+ writel(0x00, &regs->gisr2);
+
+ /* chip reset */
+ setbits_le32(&regs->dev_ctrl, DEVCTRL_RESET);
+ for (ts = get_timer(0); get_timer(ts) < CFG_RST_TIMEOUT; ) {
+ if (readl(&regs->dev_ctrl) & DEVCTRL_RESET)
+ continue;
+ break;
+ }
+ if (readl(&regs->dev_ctrl) & DEVCTRL_RESET) {
+ printf("fotg210: chip reset failed\n");
+ return -1;
+ }
+
+ /* CX FIFO reset */
+ setbits_le32(&regs->cxfifo, CXFIFO_CXFIFOCLR);
+ for (ts = get_timer(0); get_timer(ts) < CFG_RST_TIMEOUT; ) {
+ if (readl(&regs->cxfifo) & CXFIFO_CXFIFOCLR)
+ continue;
+ break;
+ }
+ if (readl(&regs->cxfifo) & CXFIFO_CXFIFOCLR) {
+ printf("fotg210: ep0 fifo reset failed\n");
+ return -1;
+ }
+
+ /* create static ep-fifo map (EP1 <-> FIFO0, EP2 <-> FIFO1 ...) */
+ writel(EPMAP14_DEFAULT, &regs->epmap14);
+ writel(EPMAP58_DEFAULT, &regs->epmap58);
+ writel(FIFOMAP_DEFAULT, &regs->fifomap);
+ writel(0, &regs->fifocfg);
+ for (i = 0; i < 8; ++i) {
+ writel(CFG_EPX_MAX_PACKET_SIZE, &regs->iep[i]);
+ writel(CFG_EPX_MAX_PACKET_SIZE, &regs->oep[i]);
+ }
+
+ /* FIFO reset */
+ for (i = 0; i < 4; ++i) {
+ writel(FIFOCSR_RESET, &regs->fifocsr[i]);
+ for (ts = get_timer(0); get_timer(ts) < CFG_RST_TIMEOUT; ) {
+ if (readl(&regs->fifocsr[i]) & FIFOCSR_RESET)
+ continue;
+ break;
+ }
+ if (readl(&regs->fifocsr[i]) & FIFOCSR_RESET) {
+ printf("fotg210: fifo%d reset failed\n", i);
+ return -1;
+ }
+ }
+
+ /* enable only device interrupt and triggered at level-high */
+ writel(0x0e, &regs->imr);
+ writel(0x07, &regs->isr);
+
+ /* disable EP0 IN/OUT interrupt */
+ writel(0x06, &regs->gimr0);
+ /* disable EPX IN+SPK+OUT interrupts */
+ writel(0xf00ff, &regs->gimr1);
+ /* disable wakeup+idle+dma+zlp interrupts */
+ writel(0x7e0, &regs->gimr2);
+ /* enable all group interrupt */
+ writel(0x00, &regs->gimr);
+
+ /* suspend delay = 3 ms */
+ writel(3, &regs->idle);
+
+ /* turn-on device interrupts */
+ setbits_le32(&regs->dev_ctrl, DEVCTRL_GIRQ_EN);
+
+ return 0;
+}
+
+static inline int fotg210_cxwait(struct fotg210_chip *chip, uint32_t mask)
+{
+ struct fotg210_regs __iomem *regs = chip->regs;
+ int ret = -1;
+ ulong ts;
+
+ for (ts = get_timer(0); get_timer(ts) < CFG_CMD_TIMEOUT; ) {
+ if ((readl(&regs->cxfifo) & mask) != mask)
+ continue;
+ ret = 0;
+ break;
+ }
+
+ if (ret)
+ printf("fotg210: cx/ep0 timeout\n");
+
+ return ret;
+}
+
+static int fotg210_dma(struct fotg210_ep *ep, struct fotg210_request *req)
+{
+ struct fotg210_chip *chip = ep->chip;
+ struct fotg210_regs __iomem *regs = chip->regs;
+ uint32_t tmp, ts;
+ uint8_t *buf = req->req.buf + req->req.actual;
+ uint32_t len = req->req.length - req->req.actual;
+ uint32_t fifo = ep_to_fifo(chip, ep->id);
+ int ret = -EBUSY;
+
+ /* 1. init dma buffer */
+ if (len > ep->maxpacket)
+ len = ep->maxpacket;
+
+ /* 2. wait for dma ready (hardware) */
+ for (ts = get_timer(0); get_timer(ts) < CFG_CMD_TIMEOUT; ) {
+ if (!(readl(&regs->dma_ctrl) & 0x01)) {
+ ret = 0;
+ break;
+ }
+ }
+ if (ret) {
+ printf("fotg210: dma busy\n");
+ req->req.status = ret;
+ return ret;
+ }
+
+ /* 3. DMA target setup */
+#ifndef CONFIG_SYS_DCACHE_OFF
+ if (ep->desc->bEndpointAddress & USB_DIR_IN)
+ flush_dcache_range((uint32_t)buf, (uint32_t)buf + len);
+ else
+ invalidate_dcache_range((uint32_t)buf, (uint32_t)buf + len);
+#endif
+ writel(virt_to_phys(buf), &regs->dma_addr);
+
+ if (ep->desc->bEndpointAddress & USB_DIR_IN) {
+ if (ep->id == 0) {
+ /* Wait until cx fifo empty */
+ fotg210_cxwait(chip, CXFIFO_CXFIFOE);
+ writel(DMAFIFO_CX, &regs->dma_fifo);
+ } else {
+ /* Wait until fifo empty */
+ fotg210_cxwait(chip, CXFIFO_FIFOE(fifo));
+ writel(DMAFIFO_FIFO(fifo), &regs->dma_fifo);
+ }
+ writel(DMACTRL_LEN(len) | DMACTRL_MEM2FIFO, &regs->dma_ctrl);
+ } else {
+ uint32_t blen;
+
+ if (ep->id == 0) {
+ writel(DMAFIFO_CX, &regs->dma_fifo);
+ do {
+ blen = CXFIFO_BYTES(readl(&regs->cxfifo));
+ } while (blen < len);
+ } else {
+ writel(DMAFIFO_FIFO(fifo), &regs->dma_fifo);
+ blen = FIFOCSR_BYTES(readl(&regs->fifocsr[fifo]));
+ }
+ len = (len < blen) ? len : blen;
+ writel(DMACTRL_LEN(len) | DMACTRL_FIFO2MEM, &regs->dma_ctrl);
+ }
+
+ /* 4. DMA start */
+ setbits_le32(&regs->dma_ctrl, DMACTRL_START);
+
+ /* 5. DMA wait */
+ ret = -EBUSY;
+ for (ts = get_timer(0); get_timer(ts) < CFG_CMD_TIMEOUT; ) {
+ tmp = readl(&regs->gisr2);
+ /* DMA complete */
+ if (tmp & GISR2_DMAFIN) {
+ ret = 0;
+ break;
+ }
+ /* DMA error */
+ if (tmp & GISR2_DMAERR) {
+ printf("fotg210: dma error\n");
+ break;
+ }
+ /* resume, suspend, reset */
+ if (tmp & 0x07) {
+ printf("fotg210: dma reset by host\n");
+ break;
+ }
+ }
+
+ /* 7. DMA target reset */
+ if (ret)
+ writel(DMACTRL_ABORT | DMACTRL_CLRFF, &regs->dma_ctrl);
+
+ writel(0, &regs->gisr2);
+ writel(0, &regs->dma_fifo);
+
+ req->req.status = ret;
+ if (!ret)
+ req->req.actual += len;
+ else
+ printf("fotg210: ep%d dma error(code=%d)\n", ep->id, ret);
+
+ return len;
+}
+
+/*
+ * result of setup packet
+ */
+#define CX_IDLE 0
+#define CX_FINISH 1
+#define CX_STALL 2
+
+static void fotg210_setup(struct fotg210_chip *chip)
+{
+ int id, ret = CX_IDLE;
+ uint32_t tmp[2];
+ struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)tmp;
+ struct fotg210_regs __iomem *regs = chip->regs;
+
+ /*
+ * If this is the first Cx 8 byte command,
+ * we can now query USB mode (high/full speed; USB 2.0/USB 1.0)
+ */
+ if (chip->state == USB_STATE_POWERED) {
+ chip->state = USB_STATE_DEFAULT;
+ if (readl(&regs->otgcsr) & OTGCSR_DEV_B) {
+ /* Mini-B */
+ if (readl(&regs->dev_ctrl) & DEVCTRL_HS) {
+ puts("fotg210: HS\n");
+ chip->gadget.speed = USB_SPEED_HIGH;
+ writel(0x044c, &regs->sof_mtr);
+ } else {
+ puts("fotg210: FS\n");
+ chip->gadget.speed = USB_SPEED_FULL;
+ writel(0x2710, &regs->sof_mtr);
+ }
+ } else {
+ printf("fotg210: mini-A?\n");
+ }
+ }
+
+ /* switch data port to ep0 */
+ writel(DMAFIFO_CX, &regs->dma_fifo);
+ /* fetch 8 bytes setup packet */
+ tmp[0] = readl(&regs->ep0_data);
+ tmp[1] = readl(&regs->ep0_data);
+ /* release data port */
+ writel(0, &regs->dma_fifo);
+
+ if (req->bRequestType & USB_DIR_IN)
+ ep0_desc.bEndpointAddress = USB_DIR_IN;
+ else
+ ep0_desc.bEndpointAddress = USB_DIR_OUT;
+
+ ret = CX_IDLE;
+
+ if ((req->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
+ switch (req->bRequest) {
+ case USB_REQ_SET_CONFIGURATION:
+ debug("fotg210: set_cfg(%d)\n", req->wValue & 0x00FF);
+ if (!(req->wValue & 0x00FF)) {
+ chip->state = USB_STATE_ADDRESS;
+ writel(DEVADDR_ADDR(chip->addr),
+ &regs->dev_addr);
+ } else {
+ chip->state = USB_STATE_CONFIGURED;
+ writel(DEVADDR_ADDR(chip->addr) | DEVADDR_CONF,
+ &regs->dev_addr);
+ }
+ ret = CX_IDLE;
+ break;
+
+ case USB_REQ_SET_ADDRESS:
+ debug("fotg210: set_addr(0x%04X)\n", req->wValue);
+ chip->state = USB_STATE_ADDRESS;
+ chip->addr = req->wValue;
+ ret = CX_FINISH;
+ writel(chip->addr, &regs->dev_addr);
+ break;
+
+ case USB_REQ_CLEAR_FEATURE:
+ debug("fotg210: clr_feature(%d, %d)\n",
+ req->bRequestType & 0x03, req->wValue);
+ switch (req->wValue) {
+ case 0: /* [Endpoint] halt */
+ ep_reset(chip, req->wIndex);
+ ret = CX_FINISH;
+ break;
+ case 1: /* [Device] remote wake-up */
+ case 2: /* [Device] test mode */
+ default:
+ ret = CX_STALL;
+ break;
+ }
+ break;
+
+ case USB_REQ_SET_FEATURE:
+ debug("fotg210: set_feature(%d, %d)\n",
+ req->wValue, req->wIndex & 0xf);
+ switch (req->wValue) {
+ case 0: /* Endpoint Halt */
+ id = req->wIndex & 0xf;
+ setbits_le32(&regs->iep[id - 1], IEP_STALL);
+ setbits_le32(&regs->oep[id - 1], OEP_STALL);
+ ret = CX_FINISH;
+ break;
+ case 1: /* Remote Wakeup */
+ case 2: /* Test Mode */
+ default:
+ ret = CX_STALL;
+ break;
+ }
+ break;
+
+ case USB_REQ_GET_STATUS:
+ debug("fotg210: get_status\n");
+ ret = CX_STALL;
+ break;
+
+ case USB_REQ_SET_DESCRIPTOR:
+ debug("fotg210: set_descriptor\n");
+ ret = CX_STALL;
+ break;
+
+ case USB_REQ_SYNCH_FRAME:
+ debug("fotg210: sync frame\n");
+ ret = CX_STALL;
+ break;
+ }
+ } /* if ((req->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) */
+
+ if (ret == CX_IDLE && chip->driver->setup) {
+ if (chip->driver->setup(&chip->gadget, req) < 0)
+ ret = CX_STALL;
+ else
+ ret = CX_FINISH;
+ }
+
+ switch (ret) {
+ case CX_FINISH:
+ setbits_le32(&regs->cxfifo, CXFIFO_CXFIN);
+ break;
+
+ case CX_STALL:
+ setbits_le32(&regs->cxfifo, CXFIFO_CXSTALL | CXFIFO_CXFIN);
+ printf("fotg210: cx_stall!\n");
+ break;
+
+ case CX_IDLE:
+ debug("fotg210: cx_idle?\n");
+ default:
+ break;
+ }
+}
+
+/*
+ * fifo - FIFO id
+ * zlp - zero length packet
+ */
+static void fotg210_recv(struct fotg210_chip *chip, int ep_id)
+{
+ struct fotg210_regs __iomem *regs = chip->regs;
+ struct fotg210_ep *ep = chip->ep + ep_id;
+ struct fotg210_request *req;
+ int len;
+
+ if (ep->stopped || (ep->desc->bEndpointAddress & USB_DIR_IN)) {
+ printf("fotg210: ep%d recv, invalid!\n", ep->id);
+ return;
+ }
+
+ if (list_empty(&ep->queue)) {
+ printf("fotg210: ep%d recv, drop!\n", ep->id);
+ return;
+ }
+
+ req = list_first_entry(&ep->queue, struct fotg210_request, queue);
+ len = fotg210_dma(ep, req);
+ if (len < ep->ep.maxpacket || req->req.length <= req->req.actual) {
+ list_del_init(&req->queue);
+ if (req->req.complete)
+ req->req.complete(&ep->ep, &req->req);
+ }
+
+ if (ep->id > 0 && list_empty(&ep->queue)) {
+ setbits_le32(&regs->gimr1,
+ GIMR1_FIFO_RX(ep_to_fifo(chip, ep->id)));
+ }
+}
+
+/*
+ * USB Gadget Layer
+ */
+static int fotg210_ep_enable(
+ struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
+{
+ struct fotg210_ep *ep = container_of(_ep, struct fotg210_ep, ep);
+ struct fotg210_chip *chip = ep->chip;
+ struct fotg210_regs __iomem *regs = chip->regs;
+ int id = ep_to_fifo(chip, ep->id);
+ int in = (desc->bEndpointAddress & USB_DIR_IN) ? 1 : 0;
+
+ if (!_ep || !desc
+ || desc->bDescriptorType != USB_DT_ENDPOINT
+ || le16_to_cpu(desc->wMaxPacketSize) == 0) {
+ printf("fotg210: bad ep or descriptor\n");
+ return -EINVAL;
+ }
+
+ ep->desc = desc;
+ ep->stopped = 0;
+
+ if (in)
+ setbits_le32(&regs->fifomap, FIFOMAP(id, FIFOMAP_IN));
+
+ switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
+ case USB_ENDPOINT_XFER_CONTROL:
+ return -EINVAL;
+
+ case USB_ENDPOINT_XFER_ISOC:
+ setbits_le32(&regs->fifocfg,
+ FIFOCFG(id, FIFOCFG_EN | FIFOCFG_ISOC));
+ break;
+
+ case USB_ENDPOINT_XFER_BULK:
+ setbits_le32(&regs->fifocfg,
+ FIFOCFG(id, FIFOCFG_EN | FIFOCFG_BULK));
+ break;
+
+ case USB_ENDPOINT_XFER_INT:
+ setbits_le32(&regs->fifocfg,
+ FIFOCFG(id, FIFOCFG_EN | FIFOCFG_INTR));
+ break;
+ }
+
+ return 0;
+}
+
+static int fotg210_ep_disable(struct usb_ep *_ep)
+{
+ struct fotg210_ep *ep = container_of(_ep, struct fotg210_ep, ep);
+ struct fotg210_chip *chip = ep->chip;
+ struct fotg210_regs __iomem *regs = chip->regs;
+ int id = ep_to_fifo(chip, ep->id);
+
+ ep->desc = NULL;
+ ep->stopped = 1;
+
+ clrbits_le32(&regs->fifocfg, FIFOCFG(id, FIFOCFG_CFG_MASK));
+ clrbits_le32(&regs->fifomap, FIFOMAP(id, FIFOMAP_DIR_MASK));
+
+ return 0;
+}
+
+static struct usb_request *fotg210_ep_alloc_request(
+ struct usb_ep *_ep, gfp_t gfp_flags)
+{
+ struct fotg210_request *req = malloc(sizeof(*req));
+
+ if (req) {
+ memset(req, 0, sizeof(*req));
+ 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);
+ free(req);
+}
+
+static int fotg210_ep_queue(
+ struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
+{
+ struct fotg210_ep *ep = container_of(_ep, struct fotg210_ep, ep);
+ struct fotg210_chip *chip = ep->chip;
+ struct fotg210_regs __iomem *regs = chip->regs;
+ struct fotg210_request *req;
+
+ req = container_of(_req, struct fotg210_request, req);
+ if (!_req || !_req->complete || !_req->buf
+ || !list_empty(&req->queue)) {
+ printf("fotg210: invalid request to ep%d\n", ep->id);
+ return -EINVAL;
+ }
+
+ if (!chip || chip->state == USB_STATE_SUSPENDED) {
+ printf("fotg210: request while chip suspended\n");
+ return -EINVAL;
+ }
+
+ req->req.actual = 0;
+ req->req.status = -EINPROGRESS;
+
+ if (req->req.length == 0) {
+ req->req.status = 0;
+ if (req->req.complete)
+ req->req.complete(&ep->ep, &req->req);
+ return 0;
+ }
+
+ if (ep->id == 0) {
+ do {
+ int len = fotg210_dma(ep, req);
+ if (len < ep->ep.maxpacket)
+ break;
+ if (ep->desc->bEndpointAddress & USB_DIR_IN)
+ udelay(100);
+ } while (req->req.length > req->req.actual);
+ } else {
+ if (ep->desc->bEndpointAddress & USB_DIR_IN) {
+ do {
+ int len = fotg210_dma(ep, req);
+ if (len < ep->ep.maxpacket)
+ break;
+ } while (req->req.length > req->req.actual);
+ } else {
+ list_add_tail(&req->queue, &ep->queue);
+ clrbits_le32(&regs->gimr1,
+ GIMR1_FIFO_RX(ep_to_fifo(chip, ep->id)));
+ }
+ }
+
+ if (ep->id == 0 || (ep->desc->bEndpointAddress & USB_DIR_IN)) {
+ if (req->req.complete)
+ req->req.complete(&ep->ep, &req->req);
+ }
+
+ return 0;
+}
+
+static int fotg210_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
+{
+ struct fotg210_ep *ep = container_of(_ep, struct fotg210_ep, ep);
+ struct fotg210_request *req;
+
+ /* make sure it's actually queued on this endpoint */
+ list_for_each_entry(req, &ep->queue, queue) {
+ if (&req->req == _req)
+ break;
+ }
+ if (&req->req != _req)
+ return -EINVAL;
+
+ /* remove the request */
+ list_del_init(&req->queue);
+
+ /* update status & invoke complete callback */
+ if (req->req.status == -EINPROGRESS) {
+ req->req.status = -ECONNRESET;
+ if (req->req.complete)
+ req->req.complete(_ep, &req->req);
+ }
+
+ return 0;
+}
+
+static int fotg210_ep_halt(struct usb_ep *_ep, int halt)
+{
+ struct fotg210_ep *ep = container_of(_ep, struct fotg210_ep, ep);
+ struct fotg210_chip *chip = ep->chip;
+ struct fotg210_regs __iomem *regs = chip->regs;
+ int ret = -1;
+
+ debug("fotg210: ep%d halt=%d\n", ep->id, halt);
+
+ /* Endpoint STALL */
+ if (ep->id > 0 && ep->id <= CFG_NUM_ENDPOINTS) {
+ if (halt) {
+ /* wait until all ep fifo empty */
+ fotg210_cxwait(chip, 0xf00);
+ /* stall */
+ if (ep->desc->bEndpointAddress & USB_DIR_IN) {
+ setbits_le32(&regs->iep[ep->id - 1],
+ IEP_STALL);
+ } else {
+ setbits_le32(&regs->oep[ep->id - 1],
+ OEP_STALL);
+ }
+ } else {
+ if (ep->desc->bEndpointAddress & USB_DIR_IN) {
+ clrbits_le32(&regs->iep[ep->id - 1],
+ IEP_STALL);
+ } else {
+ clrbits_le32(&regs->oep[ep->id - 1],
+ OEP_STALL);
+ }
+ }
+ ret = 0;
+ }
+
+ return ret;
+}
+
+/*
+ * activate/deactivate link with host.
+ */
+static void pullup(struct fotg210_chip *chip, int is_on)
+{
+ struct fotg210_regs __iomem *regs = chip->regs;
+
+ if (is_on) {
+ if (!chip->pullup) {
+ chip->state = USB_STATE_POWERED;
+ chip->pullup = 1;
+ /* enable the chip */
+ setbits_le32(&regs->dev_ctrl, DEVCTRL_EN);
+ /* clear unplug bit (BIT0) */
+ clrbits_le32(&regs->phy_tmsr, PHYTMSR_UNPLUG);
+ }
+ } else {
+ chip->state = USB_STATE_NOTATTACHED;
+ chip->pullup = 0;
+ chip->addr = 0;
+ writel(chip->addr, &regs->dev_addr);
+ /* set unplug bit (BIT0) */
+ setbits_le32(&regs->phy_tmsr, PHYTMSR_UNPLUG);
+ /* disable the chip */
+ clrbits_le32(&regs->dev_ctrl, DEVCTRL_EN);
+ }
+}
+
+static int fotg210_pullup(struct usb_gadget *_gadget, int is_on)
+{
+ struct fotg210_chip *chip;
+
+ chip = container_of(_gadget, struct fotg210_chip, gadget);
+
+ debug("fotg210: pullup=%d\n", is_on);
+
+ pullup(chip, is_on);
+
+ return 0;
+}
+
+static int fotg210_get_frame(struct usb_gadget *_gadget)
+{
+ struct fotg210_chip *chip;
+ struct fotg210_regs __iomem *regs;
+
+ chip = container_of(_gadget, struct fotg210_chip, gadget);
+ regs = chip->regs;
+
+ return readl(&regs->sof_fnr) & 0x7ff;
+}
+
+static struct usb_gadget_ops fotg210_gadget_ops = {
+ .get_frame = fotg210_get_frame,
+ .pullup = fotg210_pullup,
+};
+
+static struct usb_ep_ops fotg210_ep_ops = {
+ .enable = fotg210_ep_enable,
+ .disable = fotg210_ep_disable,
+ .queue = fotg210_ep_queue,
+ .dequeue = fotg210_ep_dequeue,
+ .set_halt = fotg210_ep_halt,
+ .alloc_request = fotg210_ep_alloc_request,
+ .free_request = fotg210_ep_free_request,
+};
+
+static struct fotg210_chip controller = {
+ .regs = (void __iomem *)CONFIG_FOTG210_BASE,
+ .gadget = {
+ .name = "fotg210_udc",
+ .ops = &fotg210_gadget_ops,
+ .ep0 = &controller.ep[0].ep,
+ .speed = USB_SPEED_UNKNOWN,
+ .is_dualspeed = 1,
+ .is_otg = 0,
+ .is_a_peripheral = 0,
+ .b_hnp_enable = 0,
+ .a_hnp_support = 0,
+ .a_alt_hnp_support = 0,
+ },
+ .ep[0] = {
+ .id = 0,
+ .ep = {
+ .name = "ep0",
+ .ops = &fotg210_ep_ops,
+ },
+ .desc = &ep0_desc,
+ .chip = &controller,
+ .maxpacket = CFG_EP0_MAX_PACKET_SIZE,
+ },
+ .ep[1] = {
+ .id = 1,
+ .ep = {
+ .name = "ep1",
+ .ops = &fotg210_ep_ops,
+ },
+ .chip = &controller,
+ .maxpacket = CFG_EPX_MAX_PACKET_SIZE,
+ },
+ .ep[2] = {
+ .id = 2,
+ .ep = {
+ .name = "ep2",
+ .ops = &fotg210_ep_ops,
+ },
+ .chip = &controller,
+ .maxpacket = CFG_EPX_MAX_PACKET_SIZE,
+ },
+ .ep[3] = {
+ .id = 3,
+ .ep = {
+ .name = "ep3",
+ .ops = &fotg210_ep_ops,
+ },
+ .chip = &controller,
+ .maxpacket = CFG_EPX_MAX_PACKET_SIZE,
+ },
+ .ep[4] = {
+ .id = 4,
+ .ep = {
+ .name = "ep4",
+ .ops = &fotg210_ep_ops,
+ },
+ .chip = &controller,
+ .maxpacket = CFG_EPX_MAX_PACKET_SIZE,
+ },
+};
+
+int usb_gadget_handle_interrupts(void)
+{
+ struct fotg210_chip *chip = &controller;
+ struct fotg210_regs __iomem *regs = chip->regs;
+ uint32_t id, st, isr, gisr;
+
+ isr = readl(&regs->isr) & (~readl(&regs->imr));
+ gisr = readl(&regs->gisr) & (~readl(&regs->gimr));
+ if (!(isr & ISR_DEV) || !gisr)
+ return 0;
+
+ writel(ISR_DEV, &regs->isr);
+
+ /* CX interrupts */
+ if (gisr & GISR_GRP0) {
+ st = readl(&regs->gisr0);
+ writel(0, &regs->gisr0);
+
+ if (st & GISR0_CXERR)
+ printf("fotg210: cmd error\n");
+
+ if (st & GISR0_CXABORT)
+ printf("fotg210: cmd abort\n");
+
+ if (st & GISR0_CXSETUP) /* setup */
+ fotg210_setup(chip);
+ else if (st & GISR0_CXEND) /* command finish */
+ setbits_le32(&regs->cxfifo, CXFIFO_CXFIN);
+ }
+
+ /* FIFO interrupts */
+ if (gisr & GISR_GRP1) {
+ st = readl(&regs->gisr1);
+ for (id = 0; id < 4; ++id) {
+ if (st & GISR1_RX_FIFO(id))
+ fotg210_recv(chip, fifo_to_ep(chip, id, 0));
+ }
+ }
+
+ /* Device Status Interrupts */
+ if (gisr & GISR_GRP2) {
+ st = readl(&regs->gisr2);
+ writel(0, &regs->gisr2);
+
+ if (st & GISR2_RESET)
+ printf("fotg210: reset by host\n");
+ else if (st & GISR2_SUSPEND)
+ printf("fotg210: suspend/removed\n");
+ else if (st & GISR2_RESUME)
+ printf("fotg210: resume\n");
+
+ /* Errors */
+ if (st & GISR2_ISOCERR)
+ printf("fotg210: iso error\n");
+ if (st & GISR2_ISOCABT)
+ printf("fotg210: iso abort\n");
+ if (st & GISR2_DMAERR)
+ printf("fotg210: dma error\n");
+ }
+
+ return 0;
+}
+
+int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+{
+ int i, ret = 0;
+ struct fotg210_chip *chip = &controller;
+
+ if (!driver || !driver->bind || !driver->setup) {
+ puts("fotg210: bad parameter.\n");
+ return -EINVAL;
+ }
+
+ INIT_LIST_HEAD(&chip->gadget.ep_list);
+ for (i = 0; i < CFG_NUM_ENDPOINTS + 1; ++i) {
+ struct fotg210_ep *ep = chip->ep + i;
+
+ ep->ep.maxpacket = ep->maxpacket;
+ INIT_LIST_HEAD(&ep->queue);
+
+ if (ep->id == 0) {
+ ep->stopped = 0;
+ } else {
+ ep->stopped = 1;
+ list_add_tail(&ep->ep.ep_list, &chip->gadget.ep_list);
+ }
+ }
+
+ if (fotg210_reset(chip)) {
+ puts("fotg210: reset failed.\n");
+ return -EINVAL;
+ }
+
+ ret = driver->bind(&chip->gadget);
+ if (ret) {
+ debug("fotg210: driver->bind() returned %d\n", ret);
+ return ret;
+ }
+ chip->driver = driver;
+
+ return ret;
+}
+
+int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
+{
+ struct fotg210_chip *chip = &controller;
+
+ driver->unbind(&chip->gadget);
+ chip->driver = NULL;
+
+ pullup(chip, 0);
+
+ return 0;
+}
diff --git a/drivers/usb/gadget/gadget_chips.h b/drivers/usb/gadget/gadget_chips.h
index e570142..f038747 100644
--- a/drivers/usb/gadget/gadget_chips.h
+++ b/drivers/usb/gadget/gadget_chips.h
@@ -150,6 +150,12 @@
#define gadget_is_mv(g) 0
#endif

+#ifdef CONFIG_USB_GADGET_FOTG210
+#define gadget_is_fotg210(g) (!strcmp("fotg210_udc", (g)->name))
+#else
+#define gadget_is_fotg210(g) 0
+#endif
+
/*
* CONFIG_USB_GADGET_SX2
* CONFIG_USB_GADGET_AU1X00
@@ -215,5 +221,7 @@ static inline int usb_gadget_controller_number(struct usb_gadget *gadget)
return 0x20;
else if (gadget_is_mv(gadget))
return 0x21;
+ else if (gadget_is_fotg210(gadget))
+ return 0x22;
return -ENOENT;
}
--
1.7.9.5