--- /dev/null
+/*
+ * omap_udc.c -- for OMAP 1610 udc, with OTG support
+ *
+ * Copyright (C) 2004 Texas Instruments, Inc.
+ * Copyright (C) 2004 David Brownell
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#undef DEBUG
+#undef VERBOSE
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/timer.h>
+#include <linux/list.h>
+#include <linux/interrupt.h>
+#include <linux/proc_fs.h>
+#include <linux/mm.h>
+#include <linux/moduleparam.h>
+#include <linux/device.h>
+#include <linux/usb_ch9.h>
+#include <linux/usb_gadget.h>
+#include <linux/usb_otg.h>
+#include <linux/dma-mapping.h>
+
+#include <asm/byteorder.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/system.h>
+#include <asm/unaligned.h>
+#include <asm/mach-types.h>
+
+#include <asm/arch/dma.h>
+#include <asm/arch/mux.h>
+#include <asm/arch/usb.h>
+
+#include "omap_udc.h"
+
+#undef USB_TRACE
+
+/* OUT-dma seems to be behaving */
+#define USE_DMA
+
+/* ISO too */
+#define USE_ISO
+
+
+#define DRIVER_DESC "OMAP UDC driver"
+#define DRIVER_VERSION "24 August 2004"
+
+#define DMA_ADDR_INVALID (~(dma_addr_t)0)
+
+
+/*
+ * The OMAP UDC needs _very_ early endpoint setup: before enabling the
+ * D+ pullup to allow enumeration. That's too early for the gadget
+ * framework to use from usb_endpoint_enable(), which happens after
+ * enumeration as part of activating an interface. (But if we add an
+ * optional new "UDC not yet running" state to the gadget driver model,
+ * even just during driver binding, the endpoint autoconfig logic is the
+ * natural spot to manufacture new endpoints.)
+ *
+ * So instead of using endpoint enable calls to control the hardware setup,
+ * this driver defines a "fifo mode" parameter. It's used during driver
+ * initialization to choose among a set of pre-defined endpoint configs.
+ * See omap_udc_setup() for available modes, or to add others. That code
+ * lives in an init section, so use this driver as a module if you need
+ * to change the fifo mode after the kernel boots.
+ *
+ * Gadget drivers normally ignore endpoints they don't care about, and
+ * won't include them in configuration descriptors. That means only
+ * misbehaving hosts would even notice they exist.
+ */
+#ifdef USE_ISO
+static unsigned fifo_mode = 3;
+#else
+static unsigned fifo_mode = 0;
+#endif
+
+/* "modprobe omap_udc fifo_mode=42", or else as a kernel
+ * boot parameter "omap_udc:fifo_mode=42"
+ */
+module_param (fifo_mode, uint, 0);
+MODULE_PARM_DESC (fifo_mode, "endpoint setup (0 == default)");
+
+
+#ifdef USE_DMA
+static unsigned use_dma = 1;
+
+/* "modprobe omap_udc use_dma=y", or else as a kernel
+ * boot parameter "omap_udc:use_dma=y"
+ */
+module_param (use_dma, bool, 0);
+MODULE_PARM_DESC (use_dma, "enable/disable DMA");
+#else /* !USE_DMA */
+
+/* save a bit of code */
+#define use_dma 0
+#endif /* !USE_DMA */
+
+
+static const char driver_name [] = "omap_udc";
+static const char driver_desc [] = DRIVER_DESC;
+
+/*-------------------------------------------------------------------------*/
+
+/* there's a notion of "current endpoint" for modifying endpoint
+ * state, and PIO access to its FIFO.
+ */
+
+static void use_ep(struct omap_ep *ep, u16 select)
+{
+ u16 num = ep->bEndpointAddress & 0x0f;
+
+ if (ep->bEndpointAddress & USB_DIR_IN)
+ num |= UDC_EP_DIR;
+ UDC_EP_NUM_REG = num | select;
+ /* when select, MUST deselect later !! */
+}
+
+static inline void deselect_ep(void)
+{
+ UDC_EP_NUM_REG &= ~UDC_EP_SEL;
+ /* 6 wait states before TX will happen */
+}
+
+static void dma_channel_claim(struct omap_ep *ep, unsigned preferred);
+
+/*-------------------------------------------------------------------------*/
+
+static int omap_ep_enable(struct usb_ep *_ep,
+ const struct usb_endpoint_descriptor *desc)
+{
+ struct omap_ep *ep = container_of(_ep, struct omap_ep, ep);
+ struct omap_udc *udc;
+ unsigned long flags;
+ u16 maxp;
+
+ /* catch various bogus parameters */
+ if (!_ep || !desc || ep->desc
+ || desc->bDescriptorType != USB_DT_ENDPOINT
+ || ep->bEndpointAddress != desc->bEndpointAddress
+ || ep->maxpacket < le16_to_cpu
+ (desc->wMaxPacketSize)) {
+ DBG("%s, bad ep or descriptor\n", __FUNCTION__);
+ return -EINVAL;
+ }
+ maxp = le16_to_cpu (desc->wMaxPacketSize);
+ if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
+ && maxp != ep->maxpacket)
+ || desc->wMaxPacketSize > ep->maxpacket
+ || !desc->wMaxPacketSize) {
+ DBG("%s, bad %s maxpacket\n", __FUNCTION__, _ep->name);
+ return -ERANGE;
+ }
+
+#ifdef USE_ISO
+ if ((desc->bmAttributes == USB_ENDPOINT_XFER_ISOC
+ && desc->bInterval != 1)) {
+ /* hardware wants period = 1; USB allows 2^(Interval-1) */
+ DBG("%s, unsupported ISO period %dms\n", _ep->name,
+ 1 << (desc->bInterval - 1));
+ return -EDOM;
+ }
+#else
+ if (desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
+ DBG("%s, ISO nyet\n", _ep->name);
+ return -EDOM;
+ }
+#endif
+
+ /* xfer types must match, except that interrupt ~= bulk */
+ if (ep->bmAttributes != desc->bmAttributes
+ && ep->bmAttributes != USB_ENDPOINT_XFER_BULK
+ && desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
+ DBG("%s, %s type mismatch\n", __FUNCTION__, _ep->name);
+ return -EINVAL;
+ }
+
+ udc = ep->udc;
+ if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN) {
+ DBG("%s, bogus device state\n", __FUNCTION__);
+ return -ESHUTDOWN;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+
+ ep->desc = desc;
+ ep->irqs = 0;
+ ep->stopped = 0;
+ ep->ep.maxpacket = maxp;
+
+ /* set endpoint to initial state */
+ ep->dma_channel = 0;
+ ep->has_dma = 0;
+ ep->lch = -1;
+ use_ep(ep, UDC_EP_SEL);
+ UDC_CTRL_REG = UDC_RESET_EP;
+ ep->ackwait = 0;
+ deselect_ep();
+
+ if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC)
+ list_add(&ep->iso, &udc->iso);
+
+ /* maybe assign a DMA channel to this endpoint */
+ if (use_dma && desc->bmAttributes == USB_ENDPOINT_XFER_BULK
+ && !(ep->bEndpointAddress & USB_DIR_IN))
+ /* FIXME ISO can dma, but prefers first channel.
+ * IN can dma, but lacks debugging.
+ */
+ dma_channel_claim(ep, 0);
+
+ /* PIO OUT may RX packets */
+ if (desc->bmAttributes != USB_ENDPOINT_XFER_ISOC
+ && !ep->has_dma
+ && !(ep->bEndpointAddress & USB_DIR_IN))
+ UDC_CTRL_REG = UDC_SET_FIFO_EN;
+
+ spin_unlock_irqrestore(&udc->lock, flags);
+ VDBG("%s enabled\n", _ep->name);
+ return 0;
+}
+
+static void nuke(struct omap_ep *, int status);
+
+static int omap_ep_disable(struct usb_ep *_ep)
+{
+ struct omap_ep *ep = container_of(_ep, struct omap_ep, ep);
+ unsigned long flags;
+
+ if (!_ep || !ep->desc) {
+ DBG("%s, %s not enabled\n", __FUNCTION__,
+ _ep ? ep->ep.name : NULL);
+ return -EINVAL;
+ }
+
+ spin_lock_irqsave(&ep->udc->lock, flags);
+ ep->desc = 0;
+ nuke (ep, -ESHUTDOWN);
+ ep->ep.maxpacket = ep->maxpacket;
+ ep->has_dma = 0;
+ UDC_CTRL_REG = UDC_SET_HALT;
+ list_del_init(&ep->iso);
+
+ spin_unlock_irqrestore(&ep->udc->lock, flags);
+
+ VDBG("%s disabled\n", _ep->name);
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static struct usb_request *
+omap_alloc_request(struct usb_ep *ep, int gfp_flags)
+{
+ struct omap_req *req;
+
+ req = kmalloc(sizeof *req, gfp_flags);
+ if (req) {
+ memset (req, 0, sizeof *req);
+ req->req.dma = DMA_ADDR_INVALID;
+ INIT_LIST_HEAD (&req->queue);
+ }
+ return &req->req;
+}
+
+static void
+omap_free_request(struct usb_ep *ep, struct usb_request *_req)
+{
+ struct omap_req *req = container_of(_req, struct omap_req, req);
+
+ if (_req)
+ kfree (req);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static void *
+omap_alloc_buffer(
+ struct usb_ep *_ep,
+ unsigned bytes,
+ dma_addr_t *dma,
+ int gfp_flags
+)
+{
+ void *retval;
+ struct omap_ep *ep;
+
+ ep = container_of(_ep, struct omap_ep, ep);
+ if (use_dma && ep->has_dma) {
+ static int warned;
+ if (!warned && bytes < PAGE_SIZE) {
+ dev_warn(ep->udc->gadget.dev.parent,
+ "using dma_alloc_coherent for "
+ "small allocations wastes memory\n");
+ warned++;
+ }
+ return dma_alloc_coherent(ep->udc->gadget.dev.parent,
+ bytes, dma, gfp_flags);
+ }
+
+ retval = kmalloc(bytes, gfp_flags);
+ if (retval)
+ *dma = virt_to_phys(retval);
+ return retval;
+}
+
+static void omap_free_buffer(
+ struct usb_ep *_ep,
+ void *buf,
+ dma_addr_t dma,
+ unsigned bytes
+)
+{
+ struct omap_ep *ep;
+
+ ep = container_of(_ep, struct omap_ep, ep);
+ if (use_dma && _ep && ep->has_dma)
+ dma_free_coherent(ep->udc->gadget.dev.parent, bytes, buf, dma);
+ else
+ kfree (buf);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static void
+done(struct omap_ep *ep, struct omap_req *req, int status)
+{
+ unsigned stopped = ep->stopped;
+
+ list_del_init(&req->queue);
+
+ if (req->req.status == -EINPROGRESS)
+ req->req.status = status;
+ else
+ status = req->req.status;
+
+ if (use_dma && ep->has_dma) {
+ if (req->mapped) {
+ dma_unmap_single(ep->udc->gadget.dev.parent,
+ req->req.dma, req->req.length,
+ (ep->bEndpointAddress & USB_DIR_IN)
+ ? DMA_TO_DEVICE
+ : DMA_FROM_DEVICE);
+ req->req.dma = DMA_ADDR_INVALID;
+ req->mapped = 0;
+ } else
+ dma_sync_single_for_cpu(ep->udc->gadget.dev.parent,
+ req->req.dma, req->req.length,
+ (ep->bEndpointAddress & USB_DIR_IN)
+ ? DMA_TO_DEVICE
+ : DMA_FROM_DEVICE);
+ }
+
+#ifndef USB_TRACE
+ if (status && status != -ESHUTDOWN)
+#endif
+ VDBG("complete %s req %p stat %d len %u/%u\n",
+ ep->ep.name, &req->req, status,
+ req->req.actual, req->req.length);
+
+ /* don't modify queue heads during completion callback */
+ ep->stopped = 1;
+ spin_unlock(&ep->udc->lock);
+ req->req.complete(&ep->ep, &req->req);
+ spin_lock(&ep->udc->lock);
+ ep->stopped = stopped;
+}
+
+/*-------------------------------------------------------------------------*/
+
+#define FIFO_FULL (UDC_NON_ISO_FIFO_FULL | UDC_ISO_FIFO_FULL)
+#define FIFO_UNWRITABLE (UDC_EP_HALTED | FIFO_FULL)
+
+#define FIFO_EMPTY (UDC_NON_ISO_FIFO_EMPTY | UDC_ISO_FIFO_EMPTY)
+#define FIFO_UNREADABLE (UDC_EP_HALTED | FIFO_EMPTY)
+
+static inline int
+write_packet(u8 *buf, struct omap_req *req, unsigned max)
+{
+ unsigned len;
+ u16 *wp;
+
+ len = min(req->req.length - req->req.actual, max);
+ req->req.actual += len;
+
+ max = len;
+ if (likely((((int)buf) & 1) == 0)) {
+ wp = (u16 *)buf;
+ while (max >= 2) {
+ UDC_DATA_REG = *wp++;
+ max -= 2;
+ }
+ buf = (u8 *)wp;
+ }
+ while (max--)
+ *(volatile u8 *)&UDC_DATA_REG = *buf++;
+ return len;
+}
+
+// FIXME change r/w fifo calling convention
+
+
+// return: 0 = still running, 1 = completed, negative = errno
+static int write_fifo(struct omap_ep *ep, struct omap_req *req)
+{
+ u8 *buf;
+ unsigned count;
+ int is_last;
+ u16 ep_stat;
+
+ buf = req->req.buf + req->req.actual;
+ prefetch(buf);
+
+ /* PIO-IN isn't double buffered except for iso */
+ ep_stat = UDC_STAT_FLG_REG;
+ if (ep_stat & FIFO_UNWRITABLE)
+ return 0;
+
+ count = ep->ep.maxpacket;
+ count = write_packet(buf, req, count);
+ UDC_CTRL_REG = UDC_SET_FIFO_EN;
+ ep->ackwait = 1;
+
+ /* last packet is often short (sometimes a zlp) */
+ if (count != ep->ep.maxpacket)
+ is_last = 1;
+ else if (req->req.length == req->req.actual
+ && !req->req.zero)
+ is_last = 1;
+ else
+ is_last = 0;
+
+ /* NOTE: requests complete when all IN data is in a
+ * FIFO (or sometimes later, if a zlp was needed).
+ * Use usb_ep_fifo_status() where needed.
+ */
+ if (is_last)
+ done(ep, req, 0);
+ return is_last;
+}
+
+static inline int
+read_packet(u8 *buf, struct omap_req *req, unsigned avail)
+{
+ unsigned len;
+ u16 *wp;
+
+ len = min(req->req.length - req->req.actual, avail);
+ req->req.actual += len;
+ avail = len;
+
+ if (likely((((int)buf) & 1) == 0)) {
+ wp = (u16 *)buf;
+ while (avail >= 2) {
+ *wp++ = UDC_DATA_REG;
+ avail -= 2;
+ }
+ buf = (u8 *)wp;
+ }
+ while (avail--)
+ *buf++ = *(volatile u8 *)&UDC_DATA_REG;
+ return len;
+}
+
+// return: 0 = still running, 1 = queue empty, negative = errno
+static int read_fifo(struct omap_ep *ep, struct omap_req *req)
+{
+ u8 *buf;
+ unsigned count, avail;
+ int is_last;
+
+ buf = req->req.buf + req->req.actual;
+ prefetchw(buf);
+
+ for (;;) {
+ u16 ep_stat = UDC_STAT_FLG_REG;
+
+ is_last = 0;
+ if (ep_stat & FIFO_UNREADABLE)
+ break;
+
+ if (ep_stat & (UDC_NON_ISO_FIFO_FULL|UDC_ISO_FIFO_FULL))
+ avail = ep->ep.maxpacket;
+ else
+ avail = UDC_RXFSTAT_REG;
+ count = read_packet(buf, req, avail);
+
+ // FIXME double buffered PIO OUT wasn't behaving...
+
+ /* partial packet reads may not be errors */
+ if (count < ep->ep.maxpacket) {
+ is_last = 1;
+ /* overflowed this request? flush extra data */
+ if (count != avail) {
+ req->req.status = -EOVERFLOW;
+ avail -= count;
+ while (avail--)
+ (void) *(volatile u8 *)&UDC_DATA_REG;
+ }
+ } else if (req->req.length == req->req.actual)
+ is_last = 1;
+ else
+ is_last = 0;
+
+ if (!ep->bEndpointAddress)
+ break;
+ if (!ep->double_buf) {
+ UDC_CTRL_REG = UDC_SET_FIFO_EN;
+ if (!is_last)
+ break;
+ }
+
+ if (is_last) {
+ done(ep, req, 0);
+ if (list_empty(&ep->queue) || !ep->double_buf)
+ break;
+ req = container_of(ep->queue.next,
+ struct omap_req, queue);
+ is_last = 0;
+ }
+ }
+ return is_last;
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* Each USB transfer request using DMA maps to one or more DMA transfers.
+ * When DMA completion isn't request completion, the UDC continues with
+ * the next DMA transfer for that USB transfer.
+ */
+
+static void next_in_dma(struct omap_ep *ep, struct omap_req *req)
+{
+ u16 txdma_ctrl;
+ unsigned length = req->req.length - req->req.actual;
+
+ /* measure length in either bytes or packets */
+ if (length <= (UDC_TXN_TSC + 1)) {
+ txdma_ctrl = UDC_TXN_EOT | length;
+ omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S8,
+ length, 1, OMAP_DMA_SYNC_ELEMENT);
+ } else {
+ length = max(length / ep->maxpacket,
+ (unsigned) UDC_TXN_TSC + 1);
+ txdma_ctrl = length;
+ omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S8,
+ ep->ep.maxpacket, length,
+ OMAP_DMA_SYNC_ELEMENT);
+ length *= ep->maxpacket;
+ }
+
+ omap_set_dma_src_params(ep->lch, OMAP_DMA_PORT_EMIFF,
+ OMAP_DMA_AMODE_POST_INC, req->req.dma + req->req.actual);
+
+ omap_start_dma(ep->lch);
+ UDC_DMA_IRQ_EN_REG |= UDC_TX_DONE_IE(ep->dma_channel);
+ UDC_TXDMA_REG(ep->dma_channel) = UDC_TXN_START | txdma_ctrl;
+ req->dma_bytes = length;
+}
+
+static void finish_in_dma(struct omap_ep *ep, struct omap_req *req, int status)
+{
+ if (status == 0) {
+ req->req.actual += req->dma_bytes;
+
+ /* return if this request needs to send data or zlp */
+ if (req->req.actual < req->req.length)
+ return;
+ if (req->req.zero
+ && req->dma_bytes != 0
+ && (req->req.actual % ep->maxpacket) == 0)
+ return;
+ } else {
+ u32 last;
+
+ // FIXME this surely isn't #bytes transferred
+ last = (omap_readw(OMAP_DMA_CSSA_U(ep->lch)) << 16)
+ | omap_readw(OMAP_DMA_CSSA_L(ep->lch));
+ req->req.actual = last - req->req.dma;
+ }
+
+ /* tx completion */
+ omap_stop_dma(ep->lch);
+ UDC_DMA_IRQ_EN_REG &= ~UDC_TX_DONE_IE(ep->dma_channel);
+ done(ep, req, status);
+}
+
+static void next_out_dma(struct omap_ep *ep, struct omap_req *req)
+{
+ unsigned packets;
+
+ /* NOTE: we filtered out "short reads" before, so we know
+ * the buffer has only whole numbers of packets.
+ */
+
+ /* set up this DMA transfer, enable the fifo, start */
+ packets = (req->req.length - req->req.actual) / ep->ep.maxpacket;
+ packets = min(packets, (unsigned)UDC_RXN_TC + 1);
+ req->dma_bytes = packets * ep->ep.maxpacket;
+ omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S8,
+ ep->ep.maxpacket, packets,
+ OMAP_DMA_SYNC_ELEMENT);
+ omap_set_dma_dest_params(ep->lch, OMAP_DMA_PORT_EMIFF,
+ OMAP_DMA_AMODE_POST_INC, req->req.dma + req->req.actual);
+
+ UDC_RXDMA_REG(ep->dma_channel) = UDC_RXN_STOP | (packets - 1);
+ UDC_DMA_IRQ_EN_REG |= UDC_RX_EOT_IE(ep->dma_channel);
+ UDC_EP_NUM_REG = (ep->bEndpointAddress & 0xf);
+ UDC_CTRL_REG = UDC_SET_FIFO_EN;
+
+ omap_start_dma(ep->lch);
+}
+
+static void
+finish_out_dma(struct omap_ep *ep, struct omap_req *req, int status)
+{
+ u16 count;
+
+ /* FIXME must be a better way to see how much dma
+ * happened, even when it never got going...
+ */
+ count = omap_readw(OMAP_DMA_CDAC(ep->lch));
+ count -= 0xffff & (req->req.dma + req->req.actual);
+ count += req->req.actual;
+ if (count <= req->req.length)
+ req->req.actual = count;
+
+ if (count != req->dma_bytes || status)
+ omap_stop_dma(ep->lch);
+
+ /* if this wasn't short, request may need another transfer */
+ else if (req->req.actual < req->req.length)
+ return;
+
+ /* rx completion */
+ UDC_DMA_IRQ_EN_REG &= ~UDC_RX_EOT_IE(ep->dma_channel);
+ done(ep, req, status);
+}
+
+static void dma_irq(struct omap_udc *udc, u16 irq_src)
+{
+ u16 dman_stat = UDC_DMAN_STAT_REG;
+ struct omap_ep *ep;
+ struct omap_req *req;
+
+ /* IN dma: tx to host */
+ if (irq_src & UDC_TXN_DONE) {
+ ep = &udc->ep[16 + UDC_DMA_TX_SRC(dman_stat)];
+ ep->irqs++;
+ /* can see TXN_DONE after dma abort */
+ if (!list_empty(&ep->queue)) {
+ req = container_of(ep->queue.next,
+ struct omap_req, queue);
+ finish_in_dma(ep, req, 0);
+ }
+ UDC_IRQ_SRC_REG = UDC_TXN_DONE;
+
+ if (!list_empty (&ep->queue)) {
+ req = container_of(ep->queue.next,
+ struct omap_req, queue);
+ next_in_dma(ep, req);
+ }
+ }
+
+ /* OUT dma: rx from host */
+ if (irq_src & UDC_RXN_EOT) {
+ ep = &udc->ep[UDC_DMA_RX_SRC(dman_stat)];
+ ep->irqs++;
+ /* can see RXN_EOT after dma abort */
+ if (!list_empty(&ep->queue)) {
+ req = container_of(ep->queue.next,
+ struct omap_req, queue);
+ finish_out_dma(ep, req, 0);
+ }
+ UDC_IRQ_SRC_REG = UDC_RXN_EOT;
+
+ if (!list_empty (&ep->queue)) {
+ req = container_of(ep->queue.next,
+ struct omap_req, queue);
+ next_out_dma(ep, req);
+ }
+ }
+
+ if (irq_src & UDC_RXN_CNT) {
+ ep = &udc->ep[UDC_DMA_RX_SRC(dman_stat)];
+ DBG("%s, RX_CNT irq?\n", ep->ep.name);
+ UDC_IRQ_SRC_REG = UDC_RXN_CNT;
+ }
+}
+
+static void dma_error(int lch, u16 ch_status, void *data)
+{
+ struct omap_ep *ep = data;
+
+ /* if ch_status & OMAP_DMA_DROP_IRQ ... */
+ /* if ch_status & OMAP_DMA_TOUT_IRQ ... */
+ ERR("%s dma error, lch %d status %02x\n", ep->ep.name, lch, ch_status);
+
+ /* complete current transfer ... */
+}
+
+static void dma_channel_claim(struct omap_ep *ep, unsigned channel)
+{
+ u16 reg;
+ int status, restart, is_in;
+
+ is_in = ep->bEndpointAddress & USB_DIR_IN;
+ if (is_in)
+ reg = UDC_TXDMA_CFG_REG;
+ else
+ reg = UDC_RXDMA_CFG_REG;
+ reg |= 1 << 12; /* "pulse" activated */
+
+ ep->dma_channel = 0;
+ ep->lch = -1;
+ if (channel == 0 || channel > 3) {
+ if ((reg & 0x0f00) == 0)
+ channel = 3;
+ else if ((reg & 0x00f0) == 0)
+ channel = 2;
+ else if ((reg & 0x000f) == 0) /* preferred for ISO */
+ channel = 1;
+ else {
+ status = -EMLINK;
+ goto just_restart;
+ }
+ }
+ reg |= (0x0f & ep->bEndpointAddress) << (4 * (channel - 1));
+ ep->dma_channel = channel;
+
+ if (is_in) {
+ status = omap_request_dma(OMAP_DMA_USB_W2FC_TX0 - 1 + channel,
+ ep->ep.name, dma_error, ep, &ep->lch);
+ if (status == 0) {
+ UDC_TXDMA_CFG_REG = reg;
+ omap_set_dma_dest_params(ep->lch,
+ OMAP_DMA_PORT_TIPB,
+ OMAP_DMA_AMODE_CONSTANT,
+ (unsigned long) io_v2p((u32)&UDC_DATA_DMA_REG));
+ }
+ } else {
+ status = omap_request_dma(OMAP_DMA_USB_W2FC_RX0 - 1 + channel,
+ ep->ep.name, dma_error, ep, &ep->lch);
+ if (status == 0) {
+ UDC_RXDMA_CFG_REG = reg;
+ omap_set_dma_src_params(ep->lch,
+ OMAP_DMA_PORT_TIPB,
+ OMAP_DMA_AMODE_CONSTANT,
+ (unsigned long) io_v2p((u32)&UDC_DATA_DMA_REG));
+ }
+ }
+ if (status)
+ ep->dma_channel = 0;
+ else {
+ ep->has_dma = 1;
+ omap_disable_dma_irq(ep->lch, OMAP_DMA_BLOCK_IRQ);
+
+ /* channel type P: hw synch (fifo) */
+ omap_writew(2, OMAP_DMA_LCH_CTRL(ep->lch));
+ }
+
+just_restart:
+ /* restart any queue, even if the claim failed */
+ restart = !ep->stopped && !list_empty(&ep->queue);
+
+ if (status)
+ DBG("%s no dma channel: %d%s\n", ep->ep.name, status,
+ restart ? " (restart)" : "");
+ else
+ DBG("%s claimed %cxdma%d lch %d%s\n", ep->ep.name,
+ is_in ? 't' : 'r',
+ ep->dma_channel - 1, ep->lch,
+ restart ? " (restart)" : "");
+
+ if (restart) {
+ struct omap_req *req;
+ req = container_of(ep->queue.next, struct omap_req, queue);
+ if (ep->has_dma)
+ (is_in ? next_in_dma : next_out_dma)(ep, req);
+ else {
+ use_ep(ep, UDC_EP_SEL);
+ (is_in ? write_fifo : read_fifo)(ep, req);
+ deselect_ep();
+ /* IN: 6 wait states before it'll tx */
+ }
+ }
+}
+
+static void dma_channel_release(struct omap_ep *ep)
+{
+ int shift = 4 * (ep->dma_channel - 1);
+ u16 mask = 0x0f << shift;
+ struct omap_req *req;
+ int active;
+
+ /* abort any active usb transfer request */
+ if (!list_empty(&ep->queue))
+ req = container_of(ep->queue.next, struct omap_req, queue);
+ else
+ req = 0;
+
+ active = ((1 << 7) & omap_readl(OMAP_DMA_CCR(ep->lch))) != 0;
+
+ DBG("%s release %s %cxdma%d %p\n", ep->ep.name,
+ active ? "active" : "idle",
+ (ep->bEndpointAddress & USB_DIR_IN) ? 't' : 'r',
+ ep->dma_channel - 1, req);
+
+ /* wait till current packet DMA finishes, and fifo empties */
+ if (ep->bEndpointAddress & USB_DIR_IN) {
+ UDC_TXDMA_CFG_REG &= ~mask;
+
+ if (req) {
+ if (active)
+ udelay(50);
+ finish_in_dma(ep, req, -ECONNRESET);
+ if (UDC_TXDMA_CFG_REG & mask)
+ WARN("%s, SPIN abort TX dma\n", ep->ep.name);
+ }
+
+ /* host may empty the fifo (or not...) */
+ while (UDC_TXDMA_CFG_REG & mask)
+ udelay(10);
+
+ } else {
+ UDC_RXDMA_CFG_REG &= ~mask;
+
+ /* dma empties the fifo */
+ while (active && (UDC_RXDMA_CFG_REG & mask))
+ udelay(10);
+ omap_stop_dma(ep->lch);
+ if (req)
+ finish_out_dma(ep, req, -ECONNRESET);
+ }
+ omap_free_dma(ep->lch);
+ ep->dma_channel = 0;
+ ep->lch = -1;
+ /* has_dma still set, till endpoint is fully quiesced */
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static int
+omap_ep_queue(struct usb_ep *_ep, struct usb_request *_req, int gfp_flags)
+{
+ struct omap_ep *ep = container_of(_ep, struct omap_ep, ep);
+ struct omap_req *req = container_of(_req, struct omap_req, req);
+ struct omap_udc *udc;
+ unsigned long flags;
+ int is_iso = 0;
+
+ /* catch various bogus parameters */
+ if (!_req || !req->req.complete || !req->req.buf
+ || !list_empty(&req->queue)) {
+ DBG("%s, bad params\n", __FUNCTION__);
+ return -EINVAL;
+ }
+ if (!_ep || (!ep->desc && ep->bEndpointAddress)) {
+ DBG("%s, bad ep\n", __FUNCTION__);
+ return -EINVAL;
+ }
+ if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
+ if (req->req.length > ep->ep.maxpacket)
+ return -EMSGSIZE;
+ is_iso = 1;
+ }
+
+ /* this isn't bogus, but OMAP DMA isn't the only hardware to
+ * have a hard time with partial packet reads... reject it.
+ */
+ if (use_dma
+ && ep->has_dma
+ && ep->bEndpointAddress != 0
+ && (ep->bEndpointAddress & USB_DIR_IN) == 0
+ && (req->req.length % ep->ep.maxpacket) != 0) {
+ DBG("%s, no partial packet OUT reads\n", __FUNCTION__);
+ return -EMSGSIZE;
+ }
+
+ udc = ep->udc;
+ if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
+ return -ESHUTDOWN;
+
+ if (use_dma && ep->has_dma) {
+ if (req->req.dma == DMA_ADDR_INVALID) {
+ req->req.dma = dma_map_single(
+ ep->udc->gadget.dev.parent,
+ req->req.buf,
+ req->req.length,
+ (ep->bEndpointAddress & USB_DIR_IN)
+ ? DMA_TO_DEVICE
+ : DMA_FROM_DEVICE);
+ req->mapped = 1;
+ } else {
+ dma_sync_single_for_device(
+ ep->udc->gadget.dev.parent,
+ req->req.dma, req->req.length,
+ (ep->bEndpointAddress & USB_DIR_IN)
+ ? DMA_TO_DEVICE
+ : DMA_FROM_DEVICE);
+ req->mapped = 0;
+ }
+ }
+
+ VDBG("%s queue req %p, len %d buf %p\n",
+ ep->ep.name, _req, _req->length, _req->buf);
+
+ spin_lock_irqsave(&udc->lock, flags);
+
+ req->req.status = -EINPROGRESS;
+ req->req.actual = 0;
+
+ /* maybe kickstart non-iso i/o queues */
+ if (is_iso)
+ UDC_IRQ_EN_REG |= UDC_SOF_IE;
+ else if (list_empty(&ep->queue) && !ep->stopped && !ep->ackwait) {
+ int is_in;
+
+ if (ep->bEndpointAddress == 0) {
+ if (!udc->ep0_pending || !list_empty (&ep->queue)) {
+ spin_unlock_irqrestore(&udc->lock, flags);
+ return -EL2HLT;
+ }
+
+ /* empty DATA stage? */
+ is_in = udc->ep0_in;
+ if (!req->req.length) {
+
+ /* chip became CONFIGURED or ADDRESSED
+ * earlier; drivers may already have queued
+ * requests to non-control endpoints
+ */
+ if (udc->ep0_set_config) {
+ u16 irq_en = UDC_IRQ_EN_REG;
+
+ irq_en |= UDC_DS_CHG_IE | UDC_EP0_IE;
+ if (!udc->ep0_reset_config)
+ irq_en |= UDC_EPN_RX_IE
+ | UDC_EPN_TX_IE;
+ UDC_IRQ_EN_REG = irq_en;
+ }
+
+ /* STATUS is reverse direction */
+ UDC_EP_NUM_REG = is_in
+ ? UDC_EP_SEL
+ : (UDC_EP_SEL|UDC_EP_DIR);
+ UDC_CTRL_REG = UDC_CLR_EP;
+ UDC_CTRL_REG = UDC_SET_FIFO_EN;
+ UDC_EP_NUM_REG = udc->ep0_in ? 0 : UDC_EP_DIR;
+
+ /* cleanup */
+ udc->ep0_pending = 0;
+ done(ep, req, 0);
+ req = 0;
+
+ /* non-empty DATA stage */
+ } else if (is_in) {
+ UDC_EP_NUM_REG = UDC_EP_SEL|UDC_EP_DIR;
+ } else {
+ if (udc->ep0_setup)
+ goto irq_wait;
+ UDC_EP_NUM_REG = UDC_EP_SEL;
+ }
+ } else {
+ is_in = ep->bEndpointAddress & USB_DIR_IN;
+ if (!ep->has_dma)
+ use_ep(ep, UDC_EP_SEL);
+ /* if ISO: SOF IRQs must be enabled/disabled! */
+ }
+
+ if (ep->has_dma)
+ (is_in ? next_in_dma : next_out_dma)(ep, req);
+ else if (req) {
+ if ((is_in ? write_fifo : read_fifo)(ep, req) == 1)
+ req = 0;
+ deselect_ep();
+ /* IN: 6 wait states before it'll tx */
+ }
+ }
+
+irq_wait:
+ /* irq handler advances the queue */
+ if (req != 0)
+ list_add_tail(&req->queue, &ep->queue);
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return 0;
+}
+
+static int omap_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
+{
+ struct omap_ep *ep = container_of(_ep, struct omap_ep, ep);
+ struct omap_req *req;
+ unsigned long flags;
+
+ if (!_ep || !_req)
+ return -EINVAL;
+
+ spin_lock_irqsave(&ep->udc->lock, flags);
+
+ /* 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) {
+ spin_unlock_irqrestore(&ep->udc->lock, flags);
+ return -EINVAL;
+ }
+
+ if (use_dma && ep->dma_channel && ep->queue.next == &req->queue) {
+ int channel = ep->dma_channel;
+
+ /* releasing the dma completion cancels the request,
+ * reclaiming the channel restarts the queue
+ */
+ dma_channel_release(ep);
+ dma_channel_claim(ep, channel);
+ } else
+ done(ep, req, -ECONNRESET);
+ spin_unlock_irqrestore(&ep->udc->lock, flags);
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static int omap_ep_set_halt(struct usb_ep *_ep, int value)
+{
+ struct omap_ep *ep = container_of(_ep, struct omap_ep, ep);
+ unsigned long flags;
+ int status = -EOPNOTSUPP;
+
+ spin_lock_irqsave(&ep->udc->lock, flags);
+
+ /* just use protocol stalls for ep0; real halts are annoying */
+ if (ep->bEndpointAddress == 0) {
+ if (!ep->udc->ep0_pending)
+ status = -EINVAL;
+ else if (value) {
+ if (ep->udc->ep0_set_config) {
+ WARN("error changing config?\n");
+ UDC_SYSCON2_REG = UDC_CLR_CFG;
+ }
+ UDC_SYSCON2_REG = UDC_STALL_CMD;
+ ep->udc->ep0_pending = 0;
+ status = 0;
+ } else /* NOP */
+ status = 0;
+
+ /* otherwise, all active non-ISO endpoints can halt */
+ } else if (ep->bmAttributes != USB_ENDPOINT_XFER_ISOC && ep->desc) {
+
+ /* IN endpoints must already be idle */
+ if ((ep->bEndpointAddress & USB_DIR_IN)
+ && !list_empty(&ep->queue)) {
+ status = -EAGAIN;
+ goto done;
+ }
+
+ if (value) {
+ int channel;
+
+ if (use_dma && ep->dma_channel
+ && !list_empty(&ep->queue)) {
+ channel = ep->dma_channel;
+ dma_channel_release(ep);
+ } else
+ channel = 0;
+
+ use_ep(ep, UDC_EP_SEL);
+ if (UDC_STAT_FLG_REG & UDC_NON_ISO_FIFO_EMPTY) {
+ UDC_CTRL_REG = UDC_SET_HALT;
+ status = 0;
+ } else
+ status = -EAGAIN;
+ deselect_ep();
+
+ if (channel)
+ dma_channel_claim(ep, channel);
+ } else {
+ use_ep(ep, 0);
+ UDC_CTRL_REG = UDC_RESET_EP;
+ ep->ackwait = 0;
+ if (!(ep->bEndpointAddress & USB_DIR_IN))
+ UDC_CTRL_REG = UDC_SET_FIFO_EN;
+ }
+ }
+done:
+ VDBG("%s %s halt stat %d\n", ep->ep.name,
+ value ? "set" : "clear", status);
+
+ spin_unlock_irqrestore(&ep->udc->lock, flags);
+ return status;
+}
+
+static struct usb_ep_ops omap_ep_ops = {
+ .enable = omap_ep_enable,
+ .disable = omap_ep_disable,
+
+ .alloc_request = omap_alloc_request,
+ .free_request = omap_free_request,
+
+ .alloc_buffer = omap_alloc_buffer,
+ .free_buffer = omap_free_buffer,
+
+ .queue = omap_ep_queue,
+ .dequeue = omap_ep_dequeue,
+
+ .set_halt = omap_ep_set_halt,
+ // fifo_status ... report bytes in fifo
+ // fifo_flush ... flush fifo
+};
+
+/*-------------------------------------------------------------------------*/
+
+static int omap_get_frame(struct usb_gadget *gadget)
+{
+ u16 sof = UDC_SOF_REG;
+ return (sof & UDC_TS_OK) ? (sof & UDC_TS) : -EL2NSYNC;
+}
+
+static int omap_wakeup(struct usb_gadget *gadget)
+{
+ struct omap_udc *udc;
+ unsigned long flags;
+ int retval = -EHOSTUNREACH;
+
+ udc = container_of(gadget, struct omap_udc, gadget);
+
+ spin_lock_irqsave(&udc->lock, flags);
+ if (udc->devstat & UDC_SUS) {
+ /* NOTE: OTG spec erratum says that OTG devices may
+ * issue wakeups without host enable.
+ */
+ if (udc->devstat & (UDC_B_HNP_ENABLE|UDC_R_WK_OK)) {
+ DBG("remote wakeup...\n");
+ UDC_SYSCON2_REG = UDC_RMT_WKP;
+ retval = 0;
+ }
+
+ /* NOTE: non-OTG systems may use SRP TOO... */
+ } else if (!(udc->devstat & UDC_ATT)) {
+ if (udc->transceiver)
+ retval = otg_start_srp(udc->transceiver);
+ }
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return retval;
+}
+
+static int
+omap_set_selfpowered(struct usb_gadget *gadget, int is_selfpowered)
+{
+ struct omap_udc *udc;
+ unsigned long flags;
+ u16 syscon1;
+
+ udc = container_of(gadget, struct omap_udc, gadget);
+ spin_lock_irqsave(&udc->lock, flags);
+ syscon1 = UDC_SYSCON1_REG;
+ if (is_selfpowered)
+ syscon1 |= UDC_SELF_PWR;
+ else
+ syscon1 &= ~UDC_SELF_PWR;
+ UDC_SYSCON1_REG = syscon1;
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return 0;
+}
+
+static int can_pullup(struct omap_udc *udc)
+{
+ return udc->driver && udc->softconnect && udc->vbus_active;
+}
+
+static void pullup_enable(struct omap_udc *udc)
+{
+ UDC_SYSCON1_REG |= UDC_PULLUP_EN;
+#ifndef CONFIG_USB_OTG
+ OTG_CTRL_REG |= OTG_BSESSVLD;
+#endif
+ UDC_IRQ_EN_REG = UDC_DS_CHG_IE;
+}
+
+static void pullup_disable(struct omap_udc *udc)
+{
+#ifndef CONFIG_USB_OTG
+ OTG_CTRL_REG &= ~OTG_BSESSVLD;
+#endif
+ UDC_IRQ_EN_REG = UDC_DS_CHG_IE;
+ UDC_SYSCON1_REG &= ~UDC_PULLUP_EN;
+}
+
+/*
+ * Called by whatever detects VBUS sessions: external transceiver
+ * driver, or maybe GPIO0 VBUS IRQ.
+ */
+static int omap_vbus_session(struct usb_gadget *gadget, int is_active)
+{
+ struct omap_udc *udc;
+ unsigned long flags;
+
+ udc = container_of(gadget, struct omap_udc, gadget);
+ spin_lock_irqsave(&udc->lock, flags);
+ VDBG("VBUS %s\n", is_active ? "on" : "off");
+ udc->vbus_active = (is_active != 0);
+ if (can_pullup(udc))
+ pullup_enable(udc);
+ else
+ pullup_disable(udc);
+ spin_unlock_irqrestore(&udc->lock, flags);
+ return 0;
+}
+
+static int omap_vbus_draw(struct usb_gadget *gadget, unsigned mA)
+{
+ struct omap_udc *udc;
+
+ udc = container_of(gadget, struct omap_udc, gadget);
+ if (udc->transceiver)
+ return otg_set_power(udc->transceiver, mA);
+ return -EOPNOTSUPP;
+}
+
+static int omap_pullup(struct usb_gadget *gadget, int is_on)
+{
+ struct omap_udc *udc;
+ unsigned long flags;
+
+ udc = container_of(gadget, struct omap_udc, gadget);
+ spin_lock_irqsave(&udc->lock, flags);
+ udc->softconnect = (is_on != 0);
+ if (can_pullup(udc))
+ pullup_enable(udc);
+ else
+ pullup_disable(udc);
+ spin_unlock_irqrestore(&udc->lock, flags);
+ return 0;
+}
+
+static struct usb_gadget_ops omap_gadget_ops = {
+ .get_frame = omap_get_frame,
+ .wakeup = omap_wakeup,
+ .set_selfpowered = omap_set_selfpowered,
+ .vbus_session = omap_vbus_session,
+ .vbus_draw = omap_vbus_draw,
+ .pullup = omap_pullup,
+};
+
+/*-------------------------------------------------------------------------*/
+
+/* dequeue ALL requests; caller holds udc->lock */
+static void nuke(struct omap_ep *ep, int status)
+{
+ struct omap_req *req;
+
+ ep->stopped = 1;
+
+ if (use_dma && ep->dma_channel)
+ dma_channel_release(ep);
+
+ use_ep(ep, 0);
+ UDC_CTRL_REG = UDC_CLR_EP;
+ if (ep->bEndpointAddress && ep->bmAttributes != USB_ENDPOINT_XFER_ISOC)
+ UDC_CTRL_REG = UDC_SET_HALT;
+
+ while (!list_empty(&ep->queue)) {
+ req = list_entry(ep->queue.next, struct omap_req, queue);
+ done(ep, req, status);
+ }
+}
+
+/* caller holds udc->lock */
+static void udc_quiesce(struct omap_udc *udc)
+{
+ struct omap_ep *ep;
+
+ udc->gadget.speed = USB_SPEED_UNKNOWN;
+ nuke(&udc->ep[0], -ESHUTDOWN);
+ list_for_each_entry (ep, &udc->gadget.ep_list, ep.ep_list)
+ nuke(ep, -ESHUTDOWN);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static void update_otg(struct omap_udc *udc)
+{
+ u16 devstat;
+
+ if (!udc->gadget.is_otg)
+ return;
+
+ if (OTG_CTRL_REG & OTG_ID)
+ devstat = UDC_DEVSTAT_REG;
+ else
+ devstat = 0;
+
+ udc->gadget.b_hnp_enable = !!(devstat & UDC_B_HNP_ENABLE);
+ udc->gadget.a_hnp_support = !!(devstat & UDC_A_HNP_SUPPORT);
+ udc->gadget.a_alt_hnp_support = !!(devstat & UDC_A_ALT_HNP_SUPPORT);
+
+ /* Enable HNP early, avoiding races on suspend irq path.
+ * ASSUMES OTG state machine B_BUS_REQ input is true.
+ */
+ if (udc->gadget.b_hnp_enable)
+ OTG_CTRL_REG = (OTG_CTRL_REG | OTG_B_HNPEN | OTG_B_BUSREQ)
+ & ~OTG_PULLUP;
+}
+
+static void ep0_irq(struct omap_udc *udc, u16 irq_src)
+{
+ struct omap_ep *ep0 = &udc->ep[0];
+ struct omap_req *req = 0;
+
+ ep0->irqs++;
+
+ /* Clear any pending requests and then scrub any rx/tx state
+ * before starting to handle the SETUP request.
+ */
+ if (irq_src & UDC_SETUP)
+ nuke(ep0, 0);
+
+ /* IN/OUT packets mean we're in the DATA or STATUS stage.
+ * This driver uses only uses protocol stalls (ep0 never halts),
+ * and if we got this far the gadget driver already had a
+ * chance to stall. Tries to be forgiving of host oddities.
+ *
+ * NOTE: the last chance gadget drivers have to stall control
+ * requests is during their request completion callback.
+ */
+ if (!list_empty(&ep0->queue))
+ req = container_of(ep0->queue.next, struct omap_req, queue);
+
+ /* IN == TX to host */
+ if (irq_src & UDC_EP0_TX) {
+ int stat;
+
+ UDC_IRQ_SRC_REG = UDC_EP0_TX;
+ UDC_EP_NUM_REG = UDC_EP_SEL|UDC_EP_DIR;
+ stat = UDC_STAT_FLG_REG;
+ if (stat & UDC_ACK) {
+ if (udc->ep0_in) {
+ /* write next IN packet from response,
+ * or set up the status stage.
+ */
+ if (req)
+ stat = write_fifo(ep0, req);
+ UDC_EP_NUM_REG = UDC_EP_DIR;
+ if (!req && udc->ep0_pending) {
+ UDC_EP_NUM_REG = UDC_EP_SEL;
+ UDC_CTRL_REG = UDC_CLR_EP;
+ UDC_CTRL_REG = UDC_SET_FIFO_EN;
+ UDC_EP_NUM_REG = 0;
+ udc->ep0_pending = 0;
+ } /* else: 6 wait states before it'll tx */
+ } else {
+ /* ack status stage of OUT transfer */
+ UDC_EP_NUM_REG = UDC_EP_DIR;
+ if (req)
+ done(ep0, req, 0);
+ }
+ req = 0;
+ } else if (stat & UDC_STALL) {
+ UDC_CTRL_REG = UDC_CLR_HALT;
+ UDC_EP_NUM_REG = UDC_EP_DIR;
+ } else {
+ UDC_EP_NUM_REG = UDC_EP_DIR;
+ }
+ }
+
+ /* OUT == RX from host */
+ if (irq_src & UDC_EP0_RX) {
+ int stat;
+
+ UDC_IRQ_SRC_REG = UDC_EP0_RX;
+ UDC_EP_NUM_REG = UDC_EP_SEL;
+ stat = UDC_STAT_FLG_REG;
+ if (stat & UDC_ACK) {
+ if (!udc->ep0_in) {
+ stat = 0;
+ /* read next OUT packet of request, maybe
+ * reactiviting the fifo; stall on errors.
+ */
+ if (!req || (stat = read_fifo(ep0, req)) < 0) {
+ UDC_SYSCON2_REG = UDC_STALL_CMD;
+ udc->ep0_pending = 0;
+ stat = 0;
+ } else if (stat == 0)
+ UDC_CTRL_REG = UDC_SET_FIFO_EN;
+ UDC_EP_NUM_REG = 0;
+
+ /* activate status stage */
+ if (stat == 1) {
+ done(ep0, req, 0);
+ /* that may have STALLed ep0... */
+ UDC_EP_NUM_REG = UDC_EP_SEL|UDC_EP_DIR;
+ UDC_CTRL_REG = UDC_CLR_EP;
+ UDC_CTRL_REG = UDC_SET_FIFO_EN;
+ UDC_EP_NUM_REG = UDC_EP_DIR;
+ udc->ep0_pending = 0;
+ }
+ } else {
+ /* ack status stage of IN transfer */
+ UDC_EP_NUM_REG = 0;
+ if (req)
+ done(ep0, req, 0);
+ }
+ } else if (stat & UDC_STALL) {
+ UDC_CTRL_REG = UDC_CLR_HALT;
+ UDC_EP_NUM_REG = 0;
+ } else {
+ UDC_EP_NUM_REG = 0;
+ }
+ }
+
+ /* SETUP starts all control transfers */
+ if (irq_src & UDC_SETUP) {
+ union u {
+ u16 word[4];
+ struct usb_ctrlrequest r;
+ } u;
+ int status = -EINVAL;
+ struct omap_ep *ep;
+
+ /* read the (latest) SETUP message */
+ do {
+ UDC_EP_NUM_REG = UDC_SETUP_SEL;
+ /* two bytes at a time */
+ u.word[0] = UDC_DATA_REG;
+ u.word[1] = UDC_DATA_REG;
+ u.word[2] = UDC_DATA_REG;
+ u.word[3] = UDC_DATA_REG;
+ UDC_EP_NUM_REG = 0;
+ } while (UDC_IRQ_SRC_REG & UDC_SETUP);
+ le16_to_cpus (&u.r.wValue);
+ le16_to_cpus (&u.r.wIndex);
+ le16_to_cpus (&u.r.wLength);
+
+ /* Delegate almost all control requests to the gadget driver,
+ * except for a handful of ch9 status/feature requests that
+ * hardware doesn't autodecode _and_ the gadget API hides.
+ */
+ udc->ep0_in = (u.r.bRequestType & USB_DIR_IN) != 0;
+ udc->ep0_set_config = 0;
+ udc->ep0_pending = 1;
+ ep0->stopped = 0;
+ ep0->ackwait = 0;
+ switch (u.r.bRequest) {
+ case USB_REQ_SET_CONFIGURATION:
+ /* udc needs to know when ep != 0 is valid */
+ if (u.r.bRequestType != USB_RECIP_DEVICE)
+ goto delegate;
+ if (u.r.wLength != 0)
+ goto do_stall;
+ udc->ep0_set_config = 1;
+ udc->ep0_reset_config = (u.r.wValue == 0);
+ VDBG("set config %d\n", u.r.wValue);
+
+ /* update udc NOW since gadget driver may start
+ * queueing requests immediately; clear config
+ * later if it fails the request.
+ */
+ if (udc->ep0_reset_config)
+ UDC_SYSCON2_REG = UDC_CLR_CFG;
+ else
+ UDC_SYSCON2_REG = UDC_DEV_CFG;
+ update_otg(udc);
+ goto delegate;
+ case USB_REQ_CLEAR_FEATURE:
+ /* clear endpoint halt */
+ if (u.r.bRequestType != USB_RECIP_ENDPOINT)
+ goto delegate;
+ if (u.r.wValue != USB_ENDPOINT_HALT
+ || u.r.wLength != 0)
+ goto do_stall;
+ ep = &udc->ep[u.r.wIndex & 0xf];
+ if (ep != ep0) {
+ if (u.r.wIndex & USB_DIR_IN)
+ ep += 16;
+ if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC
+ || !ep->desc)
+ goto do_stall;
+ use_ep(ep, 0);
+ UDC_CTRL_REG = UDC_RESET_EP;
+ ep->ackwait = 0;
+ if (!(ep->bEndpointAddress & USB_DIR_IN))
+ UDC_CTRL_REG = UDC_SET_FIFO_EN;
+ }
+ VDBG("%s halt cleared by host\n", ep->name);
+ goto ep0out_status_stage;
+ case USB_REQ_SET_FEATURE:
+ /* set endpoint halt */
+ if (u.r.bRequestType != USB_RECIP_ENDPOINT)
+ goto delegate;
+ if (u.r.wValue != USB_ENDPOINT_HALT
+ || u.r.wLength != 0)
+ goto do_stall;
+ ep = &udc->ep[u.r.wIndex & 0xf];
+ if (u.r.wIndex & USB_DIR_IN)
+ ep += 16;
+ if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC
+ || ep == ep0 || !ep->desc)
+ goto do_stall;
+ if (use_dma && ep->has_dma) {
+ /* this has rude side-effects (aborts) and
+ * can't really work if DMA-IN is active
+ */
+ DBG("%s host set_halt, NYET \n", ep->name);
+ goto do_stall;
+ }
+ use_ep(ep, 0);
+ /* can't halt if fifo isn't empty... */
+ UDC_CTRL_REG = UDC_CLR_EP;
+ UDC_CTRL_REG = UDC_SET_HALT;
+ VDBG("%s halted by host\n", ep->name);
+ep0out_status_stage:
+ status = 0;
+ UDC_EP_NUM_REG = UDC_EP_SEL|UDC_EP_DIR;
+ UDC_CTRL_REG = UDC_CLR_EP;
+ UDC_CTRL_REG = UDC_SET_FIFO_EN;
+ UDC_EP_NUM_REG = UDC_EP_DIR;
+ udc->ep0_pending = 0;
+ break;
+ case USB_REQ_GET_STATUS:
+ /* return interface status. if we were pedantic,
+ * we'd detect non-existent interfaces, and stall.
+ */
+ if (u.r.bRequestType
+ != (USB_DIR_IN|USB_RECIP_INTERFACE))
+ goto delegate;
+ /* return two zero bytes */
+ UDC_EP_NUM_REG = UDC_EP_SEL|UDC_EP_DIR;
+ UDC_DATA_REG = 0;
+ UDC_CTRL_REG = UDC_SET_FIFO_EN;
+ UDC_EP_NUM_REG = UDC_EP_DIR;
+ status = 0;
+ VDBG("GET_STATUS, interface %d\n", u.r.wIndex);
+ /* next, status stage */
+ break;
+ default:
+delegate:
+ /* activate the ep0out fifo right away */
+ if (!udc->ep0_in && u.r.wLength) {
+ UDC_EP_NUM_REG = 0;
+ UDC_CTRL_REG = UDC_SET_FIFO_EN;
+ }
+
+ /* gadget drivers see class/vendor specific requests,
+ * {SET,GET}_{INTERFACE,DESCRIPTOR,CONFIGURATION},
+ * and more
+ */
+ VDBG("SETUP %02x.%02x v%04x i%04x l%04x\n",
+ u.r.bRequestType, u.r.bRequest,
+ u.r.wValue, u.r.wIndex, u.r.wLength);
+
+ /* The gadget driver may return an error here,
+ * causing an immediate protocol stall.
+ *
+ * Else it must issue a response, either queueing a
+ * response buffer for the DATA stage, or halting ep0
+ * (causing a protocol stall, not a real halt). A
+ * zero length buffer means no DATA stage.
+ *
+ * It's fine to issue that response after the setup()
+ * call returns, and this IRQ was handled.
+ */
+ udc->ep0_setup = 1;
+ spin_unlock(&udc->lock);
+ status = udc->driver->setup (&udc->gadget, &u.r);
+ spin_lock(&udc->lock);
+ udc->ep0_setup = 0;
+ }
+
+ if (status < 0) {
+do_stall:
+ VDBG("req %02x.%02x protocol STALL; stat %d\n",
+ u.r.bRequestType, u.r.bRequest, status);
+ if (udc->ep0_set_config) {
+ if (udc->ep0_reset_config)
+ WARN("error resetting config?\n");
+ else
+ UDC_SYSCON2_REG = UDC_CLR_CFG;
+ }
+ UDC_SYSCON2_REG = UDC_STALL_CMD;
+ udc->ep0_pending = 0;
+ }
+ }
+}
+
+/*-------------------------------------------------------------------------*/
+
+#define OTG_FLAGS (UDC_B_HNP_ENABLE|UDC_A_HNP_SUPPORT|UDC_A_ALT_HNP_SUPPORT)
+
+static void devstate_irq(struct omap_udc *udc, u16 irq_src)
+{
+ u16 devstat, change;
+
+ devstat = UDC_DEVSTAT_REG;
+ change = devstat ^ udc->devstat;
+ udc->devstat = devstat;
+
+ if (change & (UDC_USB_RESET|UDC_ATT)) {
+ udc_quiesce(udc);
+
+ if (change & UDC_ATT) {
+ /* driver for any external transceiver will
+ * have called omap_vbus_session() already
+ */
+ if (devstat & UDC_ATT) {
+ udc->gadget.speed = USB_SPEED_FULL;
+ VDBG("connect\n");
+ if (!udc->transceiver)
+ pullup_enable(udc);
+ // if (driver->connect) call it
+ } else if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
+ udc->gadget.speed = USB_SPEED_UNKNOWN;
+ if (!udc->transceiver)
+ pullup_disable(udc);
+ DBG("disconnect, gadget %s\n",
+ udc->driver->driver.name);
+ if (udc->driver->disconnect) {
+ spin_unlock(&udc->lock);
+ udc->driver->disconnect(&udc->gadget);
+ spin_lock(&udc->lock);
+ }
+ }
+ change &= ~UDC_ATT;
+ }
+
+ if (change & UDC_USB_RESET) {
+ if (devstat & UDC_USB_RESET) {
+ VDBG("RESET=1\n");
+ } else {
+ udc->gadget.speed = USB_SPEED_FULL;
+ INFO("USB reset done, gadget %s\n",
+ udc->driver->driver.name);
+ /* ep0 traffic is legal from now on */
+ UDC_IRQ_EN_REG = UDC_DS_CHG_IE | UDC_EP0_IE;
+ }
+ change &= ~UDC_USB_RESET;
+ }
+ }
+ if (change & UDC_SUS) {
+ if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
+ // FIXME tell isp1301 to suspend/resume (?)
+ if (devstat & UDC_SUS) {
+ VDBG("suspend\n");
+ update_otg(udc);
+ /* HNP could be under way already */
+ if (udc->gadget.speed == USB_SPEED_FULL
+ && udc->driver->suspend) {
+ spin_unlock(&udc->lock);
+ udc->driver->suspend(&udc->gadget);
+ spin_lock(&udc->lock);
+ }
+ } else {
+ VDBG("resume\n");
+ if (udc->gadget.speed == USB_SPEED_FULL
+ && udc->driver->resume) {
+ spin_unlock(&udc->lock);
+ udc->driver->resume(&udc->gadget);
+ spin_lock(&udc->lock);
+ }
+ }
+ }
+ change &= ~UDC_SUS;
+ }
+ if (change & OTG_FLAGS) {
+ update_otg(udc);
+ change &= ~OTG_FLAGS;
+ }
+
+ change &= ~(UDC_CFG|UDC_DEF|UDC_ADD);
+ if (change)
+ VDBG("devstat %03x, ignore change %03x\n",
+ devstat, change);
+
+ UDC_IRQ_SRC_REG = UDC_DS_CHG;
+}
+
+static irqreturn_t
+omap_udc_irq(int irq, void *_udc, struct pt_regs *r)
+{
+ struct omap_udc *udc = _udc;
+ u16 irq_src;
+ irqreturn_t status = IRQ_NONE;
+ unsigned long flags;
+
+ spin_lock_irqsave(&udc->lock, flags);
+ irq_src = UDC_IRQ_SRC_REG;
+
+ /* Device state change (usb ch9 stuff) */
+ if (irq_src & UDC_DS_CHG) {
+ devstate_irq(_udc, irq_src);
+ status = IRQ_HANDLED;
+ irq_src &= ~UDC_DS_CHG;
+ }
+
+ /* EP0 control transfers */
+ if (irq_src & (UDC_EP0_RX|UDC_SETUP|UDC_EP0_TX)) {
+ ep0_irq(_udc, irq_src);
+ status = IRQ_HANDLED;
+ irq_src &= ~(UDC_EP0_RX|UDC_SETUP|UDC_EP0_TX);
+ }
+
+ /* DMA transfer completion */
+ if (use_dma && (irq_src & (UDC_TXN_DONE|UDC_RXN_CNT|UDC_RXN_EOT))) {
+ dma_irq(_udc, irq_src);
+ status = IRQ_HANDLED;
+ irq_src &= ~(UDC_TXN_DONE|UDC_RXN_CNT|UDC_RXN_EOT);
+ }
+
+ irq_src &= ~(UDC_SOF|UDC_EPN_TX|UDC_EPN_RX);
+ if (irq_src)
+ DBG("udc_irq, unhandled %03x\n", irq_src);
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return status;
+}
+
+static irqreturn_t
+omap_udc_pio_irq(int irq, void *_dev, struct pt_regs *r)
+{
+ u16 epn_stat, irq_src;
+ irqreturn_t status = IRQ_NONE;
+ struct omap_ep *ep;
+ int epnum;
+ struct omap_udc *udc = _dev;
+ struct omap_req *req;
+ unsigned long flags;
+
+ spin_lock_irqsave(&udc->lock, flags);
+ epn_stat = UDC_EPN_STAT_REG;
+ irq_src = UDC_IRQ_SRC_REG;
+
+ /* handle OUT first, to avoid some wasteful NAKs */
+ if (irq_src & UDC_EPN_RX) {
+ epnum = (epn_stat >> 8) & 0x0f;
+ UDC_IRQ_SRC_REG = UDC_EPN_RX;
+ status = IRQ_HANDLED;
+ ep = &udc->ep[epnum];
+ ep->irqs++;
+
+ if (!list_empty(&ep->queue)) {
+ UDC_EP_NUM_REG = epnum | UDC_EP_SEL;
+ if ((UDC_STAT_FLG_REG & UDC_ACK)) {
+ int stat;
+ req = container_of(ep->queue.next,
+ struct omap_req, queue);
+ stat = read_fifo(ep, req);
+ // FIXME double buffered PIO OUT should work
+ }
+ UDC_EP_NUM_REG = epnum;
+ }
+ }
+
+ /* then IN transfers */
+ if (irq_src & UDC_EPN_TX) {
+ epnum = epn_stat & 0x0f;
+ UDC_IRQ_SRC_REG = UDC_EPN_TX;
+ status = IRQ_HANDLED;
+ ep = &udc->ep[16 + epnum];
+ ep->irqs++;
+ ep->ackwait = 0;
+
+ if (!list_empty(&ep->queue)) {
+ UDC_EP_NUM_REG = epnum | UDC_EP_DIR | UDC_EP_SEL;
+ if ((UDC_STAT_FLG_REG & UDC_ACK)) {
+ req = container_of(ep->queue.next,
+ struct omap_req, queue);
+ (void) write_fifo(ep, req);
+ }
+ UDC_EP_NUM_REG = epnum | UDC_EP_DIR;
+ /* 6 wait states before it'll tx */
+ }
+ }
+
+ spin_unlock_irqrestore(&udc->lock, flags);
+ return status;
+}
+
+#ifdef USE_ISO
+static irqreturn_t
+omap_udc_iso_irq(int irq, void *_dev, struct pt_regs *r)
+{
+ struct omap_udc *udc = _dev;
+ struct omap_ep *ep;
+ int pending = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&udc->lock, flags);
+
+ /* handle all non-DMA ISO transfers */
+ list_for_each_entry (ep, &udc->iso, iso) {
+ u16 stat;
+ struct omap_req *req;
+
+ if (ep->has_dma || list_empty(&ep->queue))
+ continue;
+ req = list_entry(ep->queue.next, struct omap_req, queue);
+
+ use_ep(ep, UDC_EP_SEL);
+ stat = UDC_STAT_FLG_REG;
+
+ /* NOTE: like the other controller drivers, this isn't
+ * currently reporting lost or damaged frames.
+ */
+ if (ep->bEndpointAddress & USB_DIR_IN) {
+ if (stat & UDC_MISS_IN)
+ /* done(ep, req, -EPROTO) */;
+ else
+ write_fifo(ep, req);
+ } else {
+ int status = 0;
+
+ if (stat & UDC_NO_RXPACKET)
+ status = -EREMOTEIO;
+ else if (stat & UDC_ISO_ERR)
+ status = -EILSEQ;
+ else if (stat & UDC_DATA_FLUSH)
+ status = -ENOSR;
+
+ if (status)
+ /* done(ep, req, status) */;
+ else
+ read_fifo(ep, req);
+ }
+ deselect_ep();
+ /* 6 wait states before next EP */
+
+ ep->irqs++;
+ if (!list_empty(&ep->queue))
+ pending = 1;
+ }
+ if (!pending)
+ UDC_IRQ_EN_REG &= ~UDC_SOF_IE;
+ UDC_IRQ_SRC_REG = UDC_SOF;
+
+ spin_unlock_irqrestore(&udc->lock, flags);
+ return IRQ_HANDLED;
+}
+#endif
+
+/*-------------------------------------------------------------------------*/
+
+static struct omap_udc *udc;
+
+int usb_gadget_register_driver (struct usb_gadget_driver *driver)
+{
+ int status = -ENODEV;
+ struct omap_ep *ep;
+ unsigned long flags;
+
+ /* basic sanity tests */
+ if (!udc)
+ return -ENODEV;
+ if (!driver
+ // FIXME if otg, check: driver->is_otg
+ || driver->speed < USB_SPEED_FULL
+ || !driver->bind
+ || !driver->unbind
+ || !driver->setup)
+ return -EINVAL;
+
+ spin_lock_irqsave(&udc->lock, flags);
+ if (udc->driver) {
+ spin_unlock_irqrestore(&udc->lock, flags);
+ return -EBUSY;
+ }
+
+ /* reset state */
+ list_for_each_entry (ep, &udc->gadget.ep_list, ep.ep_list) {
+ ep->irqs = 0;
+ if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC)
+ continue;
+ use_ep(ep, 0);
+ UDC_CTRL_REG = UDC_SET_HALT;
+ }
+ udc->ep0_pending = 0;
+ udc->ep[0].irqs = 0;
+ udc->softconnect = 1;
+
+ /* hook up the driver */
+ driver->driver.bus = 0;
+ udc->driver = driver;
+ udc->gadget.dev.driver = &driver->driver;
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ status = driver->bind (&udc->gadget);
+ if (status) {
+ DBG("bind to %s --> %d\n", driver->driver.name, status);
+ udc->gadget.dev.driver = 0;
+ udc->driver = 0;
+ goto done;
+ }
+ DBG("bound to driver %s\n", driver->driver.name);
+
+ UDC_IRQ_SRC_REG = UDC_IRQ_SRC_MASK;
+
+ /* connect to bus through transceiver */
+ if (udc->transceiver) {
+ status = otg_set_peripheral(udc->transceiver, &udc->gadget);
+ if (status < 0) {
+ ERR("can't bind to transceiver\n");
+ driver->unbind (&udc->gadget);
+ udc->gadget.dev.driver = 0;
+ udc->driver = 0;
+ goto done;
+ }
+ } else {
+ if (can_pullup(udc))
+ pullup_enable (udc);
+ else
+ pullup_disable (udc);
+ }
+
+done:
+ return status;
+}
+EXPORT_SYMBOL(usb_gadget_register_driver);
+
+int usb_gadget_unregister_driver (struct usb_gadget_driver *driver)
+{
+ unsigned long flags;
+ int status = -ENODEV;
+
+ if (!udc)
+ return -ENODEV;
+ if (!driver || driver != udc->driver)
+ return -EINVAL;
+
+ if (udc->transceiver)
+ (void) otg_set_peripheral(udc->transceiver, 0);
+ else
+ pullup_disable(udc);
+
+ spin_lock_irqsave(&udc->lock, flags);
+ udc_quiesce(udc);
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ driver->unbind(&udc->gadget);
+ udc->gadget.dev.driver = 0;
+ udc->driver = 0;
+
+
+ DBG("unregistered driver '%s'\n", driver->driver.name);
+ return status;
+}
+EXPORT_SYMBOL(usb_gadget_unregister_driver);
+
+
+/*-------------------------------------------------------------------------*/
+
+#ifdef CONFIG_USB_OMAP_PROC
+
+#include <linux/seq_file.h>
+
+static const char proc_filename[] = "driver/udc";
+
+#define FOURBITS "%s%s%s%s"
+#define EIGHTBITS FOURBITS FOURBITS
+
+static void proc_ep_show(struct seq_file *s, struct omap_ep *ep)
+{
+ u16 stat_flg;
+ struct omap_req *req;
+ char buf[20];
+
+ use_ep(ep, 0);
+
+ if (use_dma && ep->has_dma)
+ snprintf(buf, sizeof buf, "(%cxdma%d lch%d) ",
+ (ep->bEndpointAddress & USB_DIR_IN) ? 't' : 'r',
+ ep->dma_channel - 1, ep->lch);
+ else
+ buf[0] = 0;
+
+ stat_flg = UDC_STAT_FLG_REG;
+ seq_printf(s,
+ "\n%s %sirqs %ld stat %04x " EIGHTBITS FOURBITS "%s\n",
+ ep->name, buf, ep->irqs, stat_flg,
+ (stat_flg & UDC_NO_RXPACKET) ? "no_rxpacket " : "",
+ (stat_flg & UDC_MISS_IN) ? "miss_in " : "",
+ (stat_flg & UDC_DATA_FLUSH) ? "data_flush " : "",
+ (stat_flg & UDC_ISO_ERR) ? "iso_err " : "",
+ (stat_flg & UDC_ISO_FIFO_EMPTY) ? "iso_fifo_empty " : "",
+ (stat_flg & UDC_ISO_FIFO_FULL) ? "iso_fifo_full " : "",
+ (stat_flg & UDC_EP_HALTED) ? "HALT " : "",
+ (stat_flg & UDC_STALL) ? "STALL " : "",
+ (stat_flg & UDC_NAK) ? "NAK " : "",
+ (stat_flg & UDC_ACK) ? "ACK " : "",
+ (stat_flg & UDC_FIFO_EN) ? "fifo_en " : "",
+ (stat_flg & UDC_NON_ISO_FIFO_EMPTY) ? "fifo_empty " : "",
+ (stat_flg & UDC_NON_ISO_FIFO_FULL) ? "fifo_full " : "");
+
+ if (list_empty (&ep->queue))
+ seq_printf(s, "\t(queue empty)\n");
+ else
+ list_for_each_entry (req, &ep->queue, queue)
+ seq_printf(s, "\treq %p len %d/%d buf %p\n",
+ &req->req, req->req.actual,
+ req->req.length, req->req.buf);
+}
+
+static char *trx_mode(unsigned m)
+{
+ switch (m) {
+ case 3:
+ case 0: return "6wire";
+ case 1: return "4wire";
+ case 2: return "3wire";
+ default: return "unknown";
+ }
+}
+
+static int proc_udc_show(struct seq_file *s, void *_)
+{
+ u32 tmp;
+ struct omap_ep *ep;
+ unsigned long flags;
+
+ spin_lock_irqsave(&udc->lock, flags);
+
+ seq_printf(s, "%s, version: " DRIVER_VERSION
+#ifdef USE_ISO
+ " (iso)"
+#endif
+ "%s\n",
+ driver_desc,
+ use_dma ? " (dma)" : "");
+
+ tmp = UDC_REV_REG & 0xff;
+ seq_printf(s,
+ "UDC rev %d.%d, OTG rev %d.%d, fifo mode %d, gadget %s\n"
+ "hmc %d, transceiver %08x %s\n",
+ tmp >> 4, tmp & 0xf,
+ OTG_REV_REG >> 4, OTG_REV_REG & 0xf,
+ fifo_mode,
+ udc->driver ? udc->driver->driver.name : "(none)",
+ HMC, USB_TRANSCEIVER_CTRL_REG,
+ udc->transceiver ? udc->transceiver->label : "");
+
+ /* OTG controller registers */
+ tmp = OTG_SYSCON_1_REG;
+ seq_printf(s, "otg_syscon1 %08x usb2 %s, usb1 %s, usb0 %s,"
+ FOURBITS "\n", tmp,
+ trx_mode(USB2_TRX_MODE(tmp)),
+ trx_mode(USB1_TRX_MODE(tmp)),
+ trx_mode(USB0_TRX_MODE(tmp)),
+ (tmp & OTG_IDLE_EN) ? " !otg" : "",
+ (tmp & HST_IDLE_EN) ? " !host" : "",
+ (tmp & DEV_IDLE_EN) ? " !dev" : "",
+ (tmp & OTG_RESET_DONE) ? " reset_done" : " reset_active");
+ tmp = OTG_SYSCON_2_REG;
+ seq_printf(s, "otg_syscon2 %08x%s" EIGHTBITS
+ " b_ase_brst=%d hmc=%d\n", tmp,
+ (tmp & OTG_EN) ? " otg_en" : "",
+ (tmp & USBX_SYNCHRO) ? " synchro" : "",
+ // much more SRP stuff
+ (tmp & SRP_DATA) ? " srp_data" : "",
+ (tmp & SRP_VBUS) ? " srp_vbus" : "",
+ (tmp & OTG_PADEN) ? " otg_paden" : "",
+ (tmp & HMC_PADEN) ? " hmc_paden" : "",
+ (tmp & UHOST_EN) ? " uhost_en" : "",
+ (tmp & HMC_TLLSPEED) ? " tllspeed" : "",
+ (tmp & HMC_TLLATTACH) ? " tllattach" : "",
+ B_ASE_BRST(tmp),
+ OTG_HMC(tmp));
+ tmp = OTG_CTRL_REG;
+ seq_printf(s, "otg_ctrl %06x" EIGHTBITS EIGHTBITS "%s\n", tmp,
+ (tmp & OTG_ASESSVLD) ? " asess" : "",
+ (tmp & OTG_BSESSEND) ? " bsess_end" : "",
+ (tmp & OTG_BSESSVLD) ? " bsess" : "",
+ (tmp & OTG_VBUSVLD) ? " vbus" : "",
+ (tmp & OTG_ID) ? " id" : "",
+ (tmp & OTG_DRIVER_SEL) ? " DEVICE" : " HOST",
+ (tmp & OTG_A_SETB_HNPEN) ? " a_setb_hnpen" : "",
+ (tmp & OTG_A_BUSREQ) ? " a_bus" : "",
+ (tmp & OTG_B_HNPEN) ? " b_hnpen" : "",
+ (tmp & OTG_B_BUSREQ) ? " b_bus" : "",
+ (tmp & OTG_BUSDROP) ? " busdrop" : "",
+ (tmp & OTG_PULLDOWN) ? " down" : "",
+ (tmp & OTG_PULLUP) ? " up" : "",
+ (tmp & OTG_DRV_VBUS) ? " drv" : "",
+ (tmp & OTG_PD_VBUS) ? " pd_vb" : "",
+ (tmp & OTG_PU_VBUS) ? " pu_vb" : "",
+ (tmp & OTG_PU_ID) ? " pu_id" : ""
+ );
+ tmp = OTG_IRQ_EN_REG;
+ seq_printf(s, "otg_irq_en %04x" "\n", tmp);
+ tmp = OTG_IRQ_SRC_REG;
+ seq_printf(s, "otg_irq_src %04x" "\n", tmp);
+ tmp = OTG_OUTCTRL_REG;
+ seq_printf(s, "otg_outctrl %04x" "\n", tmp);
+ tmp = OTG_TEST_REG;
+ seq_printf(s, "otg_test %04x" "\n", tmp);
+
+ tmp = UDC_SYSCON1_REG;
+ seq_printf(s, "\nsyscon1 %04x" EIGHTBITS "\n", tmp,
+ (tmp & UDC_CFG_LOCK) ? " cfg_lock" : "",
+ (tmp & UDC_DATA_ENDIAN) ? " data_endian" : "",
+ (tmp & UDC_DMA_ENDIAN) ? " dma_endian" : "",
+ (tmp & UDC_NAK_EN) ? " nak" : "",
+ (tmp & UDC_AUTODECODE_DIS) ? " autodecode_dis" : "",
+ (tmp & UDC_SELF_PWR) ? " self_pwr" : "",
+ (tmp & UDC_SOFF_DIS) ? " soff_dis" : "",
+ (tmp & UDC_PULLUP_EN) ? " PULLUP" : "");
+ // syscon2 is write-only
+
+ /* UDC controller registers */
+ if (!(tmp & UDC_PULLUP_EN)) {
+ seq_printf(s, "(suspended)\n");
+ spin_unlock_irqrestore(&udc->lock, flags);
+ return 0;
+ }
+
+ tmp = UDC_DEVSTAT_REG;
+ seq_printf(s, "devstat %04x" EIGHTBITS "%s%s\n", tmp,
+ (tmp & UDC_B_HNP_ENABLE) ? " b_hnp" : "",
+ (tmp & UDC_A_HNP_SUPPORT) ? " a_hnp" : "",
+ (tmp & UDC_A_ALT_HNP_SUPPORT) ? " a_alt_hnp" : "",
+ (tmp & UDC_R_WK_OK) ? " r_wk_ok" : "",
+ (tmp & UDC_USB_RESET) ? " usb_reset" : "",
+ (tmp & UDC_SUS) ? " SUS" : "",
+ (tmp & UDC_CFG) ? " CFG" : "",
+ (tmp & UDC_ADD) ? " ADD" : "",
+ (tmp & UDC_DEF) ? " DEF" : "",
+ (tmp & UDC_ATT) ? " ATT" : "");
+ seq_printf(s, "sof %04x\n", UDC_SOF_REG);
+ tmp = UDC_IRQ_EN_REG;
+ seq_printf(s, "irq_en %04x" FOURBITS "%s\n", tmp,
+ (tmp & UDC_SOF_IE) ? " sof" : "",
+ (tmp & UDC_EPN_RX_IE) ? " epn_rx" : "",
+ (tmp & UDC_EPN_TX_IE) ? " epn_tx" : "",
+ (tmp & UDC_DS_CHG_IE) ? " ds_chg" : "",
+ (tmp & UDC_EP0_IE) ? " ep0" : "");
+ tmp = UDC_IRQ_SRC_REG;
+ seq_printf(s, "irq_src %04x" EIGHTBITS "%s%s\n", tmp,
+ (tmp & UDC_TXN_DONE) ? " txn_done" : "",
+ (tmp & UDC_RXN_CNT) ? " rxn_cnt" : "",
+ (tmp & UDC_RXN_EOT) ? " rxn_eot" : "",
+ (tmp & UDC_SOF) ? " sof" : "",
+ (tmp & UDC_EPN_RX) ? " epn_rx" : "",
+ (tmp & UDC_EPN_TX) ? " epn_tx" : "",
+ (tmp & UDC_DS_CHG) ? " ds_chg" : "",
+ (tmp & UDC_SETUP) ? " setup" : "",
+ (tmp & UDC_EP0_RX) ? " ep0out" : "",
+ (tmp & UDC_EP0_TX) ? " ep0in" : "");
+ if (use_dma) {
+ unsigned i;
+
+ tmp = UDC_DMA_IRQ_EN_REG;
+ seq_printf(s, "dma_irq_en %04x%s" EIGHTBITS "\n", tmp,
+ (tmp & UDC_TX_DONE_IE(3)) ? " tx2_done" : "",
+ (tmp & UDC_RX_CNT_IE(3)) ? " rx2_cnt" : "",
+ (tmp & UDC_RX_EOT_IE(3)) ? " rx2_eot" : "",
+
+ (tmp & UDC_TX_DONE_IE(2)) ? " tx1_done" : "",
+ (tmp & UDC_RX_CNT_IE(2)) ? " rx1_cnt" : "",
+ (tmp & UDC_RX_EOT_IE(2)) ? " rx1_eot" : "",
+
+ (tmp & UDC_TX_DONE_IE(1)) ? " tx0_done" : "",
+ (tmp & UDC_RX_CNT_IE(1)) ? " rx0_cnt" : "",
+ (tmp & UDC_RX_EOT_IE(1)) ? " rx0_eot" : "");
+
+ tmp = UDC_RXDMA_CFG_REG;
+ seq_printf(s, "rxdma_cfg %04x\n", tmp);
+ if (tmp) {
+ for (i = 0; i < 3; i++) {
+ if ((tmp & (0x0f << (i * 4))) == 0)
+ continue;
+ seq_printf(s, "rxdma[%d] %04x\n", i,
+ UDC_RXDMA_REG(i + 1));
+ }
+ }
+ tmp = UDC_TXDMA_CFG_REG;
+ seq_printf(s, "txdma_cfg %04x\n", tmp);
+ if (tmp) {
+ for (i = 0; i < 3; i++) {
+ if (!(tmp & (0x0f << (i * 4))))
+ continue;
+ seq_printf(s, "txdma[%d] %04x\n", i,
+ UDC_TXDMA_REG(i + 1));
+ }
+ }
+ }
+
+ tmp = UDC_DEVSTAT_REG;
+ if (tmp & UDC_ATT) {
+ proc_ep_show(s, &udc->ep[0]);
+ if (tmp & UDC_ADD) {
+ list_for_each_entry (ep, &udc->gadget.ep_list,
+ ep.ep_list) {
+ if (ep->desc)
+ proc_ep_show(s, ep);
+ }
+ }
+ }
+ spin_unlock_irqrestore(&udc->lock, flags);
+ return 0;
+}
+
+static int proc_udc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, proc_udc_show, 0);
+}
+
+static struct file_operations proc_ops = {
+ .open = proc_udc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static void create_proc_file(void)
+{
+ struct proc_dir_entry *pde;
+
+ pde = create_proc_entry (proc_filename, 0, NULL);
+ if (pde)
+ pde->proc_fops = &proc_ops;
+}
+
+static void remove_proc_file(void)
+{
+ remove_proc_entry(proc_filename, 0);
+}
+
+#else
+
+static inline void create_proc_file(void) {}
+static inline void remove_proc_file(void) {}
+
+#endif
+
+/*-------------------------------------------------------------------------*/
+
+/* Before this controller can enumerate, we need to pick an endpoint
+ * configuration, or "fifo_mode" That involves allocating 2KB of packet
+ * buffer space among the endpoints we'll be operating.
+ */
+static unsigned __init
+omap_ep_setup(char *name, u8 addr, u8 type,
+ unsigned buf, unsigned maxp, int dbuf)
+{
+ struct omap_ep *ep;
+ u16 epn_rxtx = 0;
+
+ /* OUT endpoints first, then IN */
+ ep = &udc->ep[addr & 0xf];
+ if (addr & USB_DIR_IN)
+ ep += 16;
+
+ /* in case of ep init table bugs */
+ BUG_ON(ep->name[0]);
+
+ /* chip setup ... bit values are same for IN, OUT */
+ if (type == USB_ENDPOINT_XFER_ISOC) {
+ switch (maxp) {
+ case 8: epn_rxtx = 0 << 12; break;
+ case 16: epn_rxtx = 1 << 12; break;
+ case 32: epn_rxtx = 2 << 12; break;
+ case 64: epn_rxtx = 3 << 12; break;
+ case 128: epn_rxtx = 4 << 12; break;
+ case 256: epn_rxtx = 5 << 12; break;
+ case 512: epn_rxtx = 6 << 12; break;
+ default: BUG();
+ }
+ epn_rxtx |= UDC_EPN_RX_ISO;
+ dbuf = 1;
+ } else {
+ /* pio-out could potentially double-buffer,
+ * as can (should!) DMA-IN
+ */
+ if (!use_dma || (addr & USB_DIR_IN))
+ dbuf = 0;
+
+ switch (maxp) {
+ case 8: epn_rxtx = 0 << 12; break;
+ case 16: epn_rxtx = 1 << 12; break;
+ case 32: epn_rxtx = 2 << 12; break;
+ case 64: epn_rxtx = 3 << 12; break;
+ default: BUG();
+ }
+ if (dbuf && addr)
+ epn_rxtx |= UDC_EPN_RX_DB;
+ }
+ if (addr)
+ epn_rxtx |= UDC_EPN_RX_VALID;
+ BUG_ON(buf & 0x07);
+ epn_rxtx |= buf >> 3;
+
+ DBG("%s addr %02x rxtx %04x maxp %d%s buf %d\n",
+ name, addr, epn_rxtx, maxp, dbuf ? "x2" : "", buf);
+
+ if (addr & USB_DIR_IN)
+ UDC_EP_TX_REG(addr & 0xf) = epn_rxtx;
+ else
+ UDC_EP_RX_REG(addr) = epn_rxtx;
+
+ /* next endpoint's buffer starts after this one's */
+ buf += maxp;
+ if (dbuf)
+ buf += maxp;
+ BUG_ON(buf > 2048);
+
+ /* set up driver data structures */
+ BUG_ON(strlen(name) >= sizeof ep->name);
+ strlcpy(ep->name, name, sizeof ep->name);
+ INIT_LIST_HEAD(&ep->queue);
+ INIT_LIST_HEAD(&ep->iso);
+ ep->bEndpointAddress = addr;
+ ep->bmAttributes = type;
+ ep->double_buf = dbuf;
+ ep->udc = udc;
+
+ ep->ep.name = ep->name;
+ ep->ep.ops = &omap_ep_ops;
+ ep->ep.maxpacket = ep->maxpacket = maxp;
+ list_add_tail (&ep->ep.ep_list, &udc->gadget.ep_list);
+
+ return buf;
+}
+
+static void omap_udc_release(struct device *dev)
+{
+ complete(udc->done);
+ kfree (udc);
+ udc = 0;
+}
+
+static int __init
+omap_udc_setup(struct platform_device *odev, struct otg_transceiver *xceiv)
+{
+ unsigned tmp, buf;
+
+ /* abolish any previous hardware state */
+ UDC_SYSCON1_REG = 0;
+ UDC_IRQ_EN_REG = 0;
+ UDC_IRQ_SRC_REG = UDC_IRQ_SRC_MASK;
+ UDC_DMA_IRQ_EN_REG = 0;
+ UDC_RXDMA_CFG_REG = 0;
+ UDC_TXDMA_CFG_REG = 0;
+
+ /* UDC_PULLUP_EN gates the chip clock */
+ // OTG_SYSCON_1_REG |= DEV_IDLE_EN;
+
+ udc = kmalloc (sizeof *udc, SLAB_KERNEL);
+ if (!udc)
+ return -ENOMEM;
+
+ memset(udc, 0, sizeof *udc);
+ spin_lock_init (&udc->lock);
+
+ udc->gadget.ops = &omap_gadget_ops;
+ udc->gadget.ep0 = &udc->ep[0].ep;
+ INIT_LIST_HEAD(&udc->gadget.ep_list);
+ INIT_LIST_HEAD(&udc->iso);
+ udc->gadget.speed = USB_SPEED_UNKNOWN;
+ udc->gadget.name = driver_name;
+
+ device_initialize(&udc->gadget.dev);
+ strcpy (udc->gadget.dev.bus_id, "gadget");
+ udc->gadget.dev.release = omap_udc_release;
+ udc->gadget.dev.parent = &odev->dev;
+ if (use_dma)
+ udc->gadget.dev.dma_mask = odev->dev.dma_mask;
+
+ udc->transceiver = xceiv;
+
+ /* ep0 is special; put it right after the SETUP buffer */
+ buf = omap_ep_setup("ep0", 0, USB_ENDPOINT_XFER_CONTROL,
+ 8 /* after SETUP */, 64 /* maxpacket */, 0);
+ list_del_init(&udc->ep[0].ep.ep_list);
+
+ /* initially disable all non-ep0 endpoints */
+ for (tmp = 1; tmp < 15; tmp++) {
+ UDC_EP_RX_REG(tmp) = 0;
+ UDC_EP_TX_REG(tmp) = 0;
+ }
+
+#define OMAP_BULK_EP(name,addr) \
+ buf = omap_ep_setup(name "-bulk", addr, \
+ USB_ENDPOINT_XFER_BULK, buf, 64, 1);
+#define OMAP_INT_EP(name,addr, maxp) \
+ buf = omap_ep_setup(name "-int", addr, \
+ USB_ENDPOINT_XFER_INT, buf, maxp, 0);
+#define OMAP_ISO_EP(name,addr, maxp) \
+ buf = omap_ep_setup(name "-iso", addr, \
+ USB_ENDPOINT_XFER_ISOC, buf, maxp, 1);
+
+ switch (fifo_mode) {
+ case 0:
+ OMAP_BULK_EP("ep1in", USB_DIR_IN | 1);
+ OMAP_BULK_EP("ep2out", USB_DIR_OUT | 2);
+ OMAP_INT_EP("ep3in", USB_DIR_IN | 3, 16);
+ break;
+ case 1:
+ OMAP_BULK_EP("ep1in", USB_DIR_IN | 1);
+ OMAP_BULK_EP("ep2out", USB_DIR_OUT | 2);
+ OMAP_BULK_EP("ep3in", USB_DIR_IN | 3);
+ OMAP_BULK_EP("ep4out", USB_DIR_OUT | 4);
+
+ OMAP_BULK_EP("ep5in", USB_DIR_IN | 5);
+ OMAP_BULK_EP("ep5out", USB_DIR_OUT | 5);
+ OMAP_BULK_EP("ep6in", USB_DIR_IN | 6);
+ OMAP_BULK_EP("ep6out", USB_DIR_OUT | 6);
+
+ OMAP_BULK_EP("ep7in", USB_DIR_IN | 7);
+ OMAP_BULK_EP("ep7out", USB_DIR_OUT | 7);
+ OMAP_BULK_EP("ep8in", USB_DIR_IN | 8);
+ OMAP_BULK_EP("ep8out", USB_DIR_OUT | 8);
+
+ OMAP_INT_EP("ep9in", USB_DIR_IN | 9, 16);
+ OMAP_INT_EP("ep10out", USB_DIR_IN | 10, 16);
+ OMAP_INT_EP("ep11in", USB_DIR_IN | 9, 16);
+ OMAP_INT_EP("ep12out", USB_DIR_IN | 10, 16);
+ break;
+
+#ifdef USE_ISO
+ case 2: /* mixed iso/bulk */
+ OMAP_ISO_EP("ep1in", USB_DIR_IN | 1, 256);
+ OMAP_ISO_EP("ep2out", USB_DIR_OUT | 2, 256);
+ OMAP_ISO_EP("ep3in", USB_DIR_IN | 3, 128);
+ OMAP_ISO_EP("ep4out", USB_DIR_OUT | 4, 128);
+
+ OMAP_INT_EP("ep5in", USB_DIR_IN | 5, 16);
+
+ OMAP_BULK_EP("ep6in", USB_DIR_IN | 6);
+ OMAP_BULK_EP("ep7out", USB_DIR_OUT | 7);
+ OMAP_INT_EP("ep8in", USB_DIR_IN | 8, 16);
+ break;
+ case 3: /* mixed bulk/iso */
+ OMAP_BULK_EP("ep1in", USB_DIR_IN | 1);
+ OMAP_BULK_EP("ep2out", USB_DIR_OUT | 2);
+ OMAP_INT_EP("ep3in", USB_DIR_IN | 3, 16);
+
+ OMAP_BULK_EP("ep4in", USB_DIR_IN | 4);
+ OMAP_BULK_EP("ep5out", USB_DIR_OUT | 5);
+ OMAP_INT_EP("ep6in", USB_DIR_IN | 6, 16);
+
+ OMAP_ISO_EP("ep7in", USB_DIR_IN | 7, 256);
+ OMAP_ISO_EP("ep8out", USB_DIR_OUT | 8, 256);
+ OMAP_INT_EP("ep9in", USB_DIR_IN | 9, 16);
+ break;
+#endif
+
+ /* add more modes as needed */
+
+ default:
+ ERR("unsupported fifo_mode #%d\n", fifo_mode);
+ return -ENODEV;
+ }
+ UDC_SYSCON1_REG = UDC_CFG_LOCK|UDC_SELF_PWR;
+ INFO("fifo mode %d, %d bytes not used\n", fifo_mode, 2048 - buf);
+ return 0;
+}
+
+static int __init omap_udc_probe(struct device *dev)
+{
+ struct platform_device *odev = to_platform_device(dev);
+ int status = -ENODEV;
+ int hmc;
+ struct otg_transceiver *xceiv = 0;
+ const char *type = 0;
+ struct omap_usb_config *config = dev->platform_data;
+
+ /* NOTE: "knows" the order of the resources! */
+ if (!request_mem_region(odev->resource[0].start,
+ odev->resource[0].end - odev->resource[0].start + 1,
+ driver_name)) {
+ DBG("request_mem_region failed\n");
+ return -EBUSY;
+ }
+
+ INFO("OMAP UDC rev %d.%d, OTG rev %d.%d, %s receptacle\n",
+ UDC_REV_REG >> 4, UDC_REV_REG & 0xf,
+ OTG_REV_REG >> 4, OTG_REV_REG & 0xf,
+ config->otg ? "Mini-AB" : "B/Mini-B");
+
+ /* use the mode given to us by board init code */
+ hmc = HMC;
+ switch (hmc) {
+ case 3:
+ case 11:
+ case 19:
+ case 25:
+ xceiv = otg_get_transceiver();
+ if (!xceiv) {
+ DBG("external transceiver not registered!\n");
+ goto cleanup0;
+ }
+ type = xceiv->label;
+ break;
+ case 0: /* POWERUP DEFAULT == 0 */
+ case 4:
+ case 12:
+ case 20:
+ type = "INTEGRATED";
+ break;
+ case 21: /* internal loopback */
+ type = "(loopback)";
+ break;
+ case 14: /* transceiverless */
+ type = "(none)";
+ break;
+
+ default:
+ ERR("unrecognized UDC HMC mode %d\n", hmc);
+ return -ENODEV;
+ }
+ INFO("hmc mode %d, transceiver %s\n", hmc, type);
+
+ /* a "gadget" abstracts/virtualizes the controller */
+ status = omap_udc_setup(odev, xceiv);
+ if (status) {
+ goto cleanup0;
+ }
+ xceiv = 0;
+ // "udc" is now valid
+ pullup_disable(udc);
+ udc->gadget.is_otg = (config->otg != 0);
+
+ /* USB general purpose IRQ: ep0, state changes, dma, etc */
+ status = request_irq(odev->resource[1].start, omap_udc_irq,
+ SA_SAMPLE_RANDOM, driver_name, udc);
+ if (status != 0) {
+ ERR( "can't get irq %ld, err %d\n",
+ odev->resource[1].start, status);
+ goto cleanup1;
+ }
+
+ /* USB "non-iso" IRQ (PIO for all but ep0) */
+ status = request_irq(odev->resource[2].start, omap_udc_pio_irq,
+ SA_SAMPLE_RANDOM, "omap_udc pio", udc);
+ if (status != 0) {
+ ERR( "can't get irq %ld, err %d\n",
+ odev->resource[2].start, status);
+ goto cleanup2;
+ }
+#ifdef USE_ISO
+ status = request_irq(odev->resource[3].start, omap_udc_iso_irq,
+ SA_INTERRUPT, "omap_udc iso", udc);
+ if (status != 0) {
+ ERR("can't get irq %ld, err %d\n",
+ odev->resource[3].start, status);
+ goto cleanup3;
+ }
+#endif
+
+ create_proc_file();
+ device_add(&udc->gadget.dev);
+ return 0;
+
+#ifdef USE_ISO
+cleanup3:
+ free_irq(odev->resource[2].start, udc);
+#endif
+
+cleanup2:
+ free_irq(odev->resource[1].start, udc);
+
+cleanup1:
+ kfree (udc);
+ udc = 0;
+
+cleanup0:
+ if (xceiv)
+ put_device(xceiv->dev);
+ release_mem_region(odev->resource[0].start,
+ odev->resource[0].end - odev->resource[0].start + 1);
+ return status;
+}
+
+static int __exit omap_udc_remove(struct device *dev)
+{
+ struct platform_device *odev = to_platform_device(dev);
+ DECLARE_COMPLETION(done);
+
+ if (!udc)
+ return -ENODEV;
+
+ udc->done = &done;
+
+ pullup_disable(udc);
+ if (udc->transceiver) {
+ put_device(udc->transceiver->dev);
+ udc->transceiver = 0;
+ }
+ UDC_SYSCON1_REG = 0;
+
+ remove_proc_file();
+
+#ifdef USE_ISO
+ free_irq(odev->resource[3].start, udc);
+#endif
+ free_irq(odev->resource[2].start, udc);
+ free_irq(odev->resource[1].start, udc);
+
+ release_mem_region(odev->resource[0].start,
+ odev->resource[0].end - odev->resource[0].start + 1);
+
+ device_unregister(&udc->gadget.dev);
+ wait_for_completion(&done);
+
+ return 0;
+}
+
+/* suspend/resume/wakeup from sysfs (echo > power/state) */
+
+static int omap_udc_suspend(struct device *dev, u32 state, u32 level)
+{
+ if (level != 0)
+ return 0;
+
+ DBG("suspend, state %d\n", state);
+ omap_pullup(&udc->gadget, 0);
+ udc->gadget.dev.power.power_state = 3;
+ udc->gadget.dev.parent->power.power_state = 3;
+ return 0;
+}
+
+static int omap_udc_resume(struct device *dev, u32 level)
+{
+ if (level != 0)
+ return 0;
+
+ DBG("resume + wakeup/SRP\n");
+ udc->gadget.dev.parent->power.power_state = 0;
+ udc->gadget.dev.power.power_state = 0;
+ omap_pullup(&udc->gadget, 1);
+
+ /* maybe the host would enumerate us if we nudged it */
+ msleep(100);
+ return omap_wakeup(&udc->gadget);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static struct device_driver udc_driver = {
+ .name = (char *) driver_name,
+ .bus = &platform_bus_type,
+ .probe = omap_udc_probe,
+ .remove = __exit_p(omap_udc_remove),
+ .suspend = omap_udc_suspend,
+ .resume = omap_udc_resume,
+};
+
+static int __init udc_init(void)
+{
+ /* should work on many OMAP systems with at most minor changes,
+ * but the 1510 doesn't have an OTG controller.
+ */
+ if (cpu_is_omap1510()) {
+ DBG("no OMAP1510 support yet\n");
+ return -ENODEV;
+ }
+ INFO("%s, version: " DRIVER_VERSION "%s\n", driver_desc,
+ use_dma ? " (dma)" : "");
+ return driver_register(&udc_driver);
+}
+module_init(udc_init);
+
+static void __exit udc_exit(void)
+{
+ driver_unregister(&udc_driver);
+}
+module_exit(udc_exit);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
git://git.onelab.eu / linux-2.6.git / blobdiff