Support for PXA27X UDC.
This Patch adds Support for PXA27X UDC.
(Rebased to drivers/usb reorganisation)
Signed-off-by: Vivek Kutal <vivek.kutal@azingo.com>
Signed-off-by: Remy Bohmer <linux@bohmer.net>
diff --git a/drivers/usb/gadget/pxa27x_udc.c b/drivers/usb/gadget/pxa27x_udc.c
new file mode 100644
index 0000000..e6ccd49
--- /dev/null
+++ b/drivers/usb/gadget/pxa27x_udc.c
@@ -0,0 +1,702 @@
+/*
+ * PXA27x USB device driver for u-boot.
+ *
+ * Copyright (C) 2007 Rodolfo Giometti <giometti@linux.it>
+ * Copyright (C) 2007 Eurotech S.p.A. <info@eurotech.it>
+ * Copyright (C) 2008 Vivek Kutal <vivek.kutal@azingo.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; 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
+ *
+ */
+
+
+#include <common.h>
+#include <config.h>
+#include <asm/byteorder.h>
+#include <usbdcore.h>
+#include <usbdcore_ep0.h>
+#include <asm/arch/hardware.h>
+#include <usb/pxa27x_udc.h>
+
+/* number of endpoints on this UDC */
+#define UDC_MAX_ENDPOINTS 24
+
+static struct urb *ep0_urb;
+static struct usb_device_instance *udc_device;
+static int ep0state = EP0_IDLE;
+
+#ifdef USBDDBG
+static void udc_dump_buffer(char *name, u8 *buf, int len)
+{
+ usbdbg("%s - buf %p, len %d", name, buf, len);
+ print_buffer(0, buf, 1, len, 0);
+}
+#else
+#define udc_dump_buffer(name, buf, len) /* void */
+#endif
+
+static inline void udc_ack_int_UDCCR(int mask)
+{
+ USIR1 = mask | USIR1;
+}
+
+/*
+ * If the endpoint has an active tx_urb, then the next packet of data from the
+ * URB is written to the tx FIFO.
+ * The total amount of data in the urb is given by urb->actual_length.
+ * The maximum amount of data that can be sent in any one packet is given by
+ * endpoint->tx_packetSize.
+ * The number of data bytes from this URB that have already been transmitted
+ * is given by endpoint->sent.
+ * endpoint->last is updated by this routine with the number of data bytes
+ * transmitted in this packet.
+ */
+static int udc_write_urb(struct usb_endpoint_instance *endpoint)
+{
+ struct urb *urb = endpoint->tx_urb;
+ int ep_num = endpoint->endpoint_address & USB_ENDPOINT_NUMBER_MASK;
+ u32 *addr32 = (u32 *) &UDCDN(ep_num);
+ u32 *data32 = (u32 *) urb->buffer;
+ u8 *addr8 = (u8 *) &UDCDN(ep_num);
+ u8 *data8 = (u8 *) urb->buffer;
+ unsigned int i, n, w, b, is_short;
+ int timeout = 2000; /* 2ms */
+
+ if (!urb || !urb->actual_length)
+ return -1;
+
+ n = MIN(urb->actual_length - endpoint->sent, endpoint->tx_packetSize);
+ if (n <= 0)
+ return -1;
+
+ usbdbg("write urb on ep %d", ep_num);
+#if defined(USBDDBG) && defined(USBDPARANOIA)
+ usbdbg("urb: buf %p, buf_len %d, actual_len %d",
+ urb->buffer, urb->buffer_length, urb->actual_length);
+ usbdbg("endpoint: sent %d, tx_packetSize %d, last %d",
+ endpoint->sent, endpoint->tx_packetSize, endpoint->last);
+#endif
+
+ is_short = n != endpoint->tx_packetSize;
+ w = n / 4;
+ b = n % 4;
+ usbdbg("n %d%s w %d b %d", n, is_short ? "-s" : "", w, b);
+ udc_dump_buffer("urb write", data8 + endpoint->sent, n);
+
+ /* Prepare for data send */
+ if (ep_num)
+ UDCCSN(ep_num) = UDCCSR_PC;
+
+ for (i = 0; i < w; i++)
+ *addr32 = data32[endpoint->sent/4 + i];
+ for (i = 0; i < b; i++)
+ *addr8 = data8[endpoint->sent + w*4 + i];
+
+ /* Set "Packet Complete" if less data then tx_packetSize */
+ if (is_short)
+ UDCCSN(ep_num) = ep_num ? UDCCSR_SP : UDCCSR0_IPR;
+
+ /* Wait for data sent */
+ while (!(UDCCSN(ep_num) & (ep_num ? UDCCSR_PC : UDCCSR0_IPR))) {
+ if (ep_num) {
+ if (timeout-- == 0)
+ return -1;
+ else
+ udelay(1);
+ };
+ }
+ endpoint->last = n;
+
+ if (ep_num) {
+ usbd_tx_complete(endpoint);
+ } else {
+ endpoint->sent += n;
+ endpoint->last -= n;
+ }
+
+ if ((endpoint->tx_urb->actual_length - endpoint->sent) <= 0) {
+ urb->actual_length = 0;
+ endpoint->sent = 0;
+ endpoint->last = 0;
+ }
+
+ if ((endpoint->sent >= urb->actual_length) && (!ep_num)) {
+ usbdbg("ep0 IN stage done");
+ if (is_short)
+ ep0state = EP0_IDLE;
+ else
+ ep0state = EP0_XFER_COMPLETE;
+ }
+
+ return 0;
+}
+
+static int udc_read_urb(struct usb_endpoint_instance *endpoint)
+{
+ struct urb *urb = endpoint->rcv_urb;
+ int ep_num = endpoint->endpoint_address & USB_ENDPOINT_NUMBER_MASK;
+ u32 *addr32 = (u32 *) &UDCDN(ep_num);
+ u32 *data32 = (u32 *) urb->buffer;
+ unsigned int i, n, is_short ;
+
+ usbdbg("read urb on ep %d", ep_num);
+#if defined(USBDDBG) && defined(USBDPARANOIA)
+ usbdbg("urb: buf %p, buf_len %d, actual_len %d",
+ urb->buffer, urb->buffer_length, urb->actual_length);
+ usbdbg("endpoint: rcv_packetSize %d",
+ endpoint->rcv_packetSize);
+#endif
+
+ if (UDCCSN(ep_num) & UDCCSR_BNE)
+ n = UDCBCN(ep_num) & 0x3ff;
+ else /* zlp */
+ n = 0;
+ is_short = n != endpoint->rcv_packetSize;
+
+ usbdbg("n %d%s", n, is_short ? "-s" : "");
+ for (i = 0; i < n; i += 4)
+ data32[urb->actual_length/4 + i/4] = *addr32;
+
+ udc_dump_buffer("urb read", (u8 *) data32, urb->actual_length + n);
+ usbd_rcv_complete(endpoint, n, 0);
+
+ return 0;
+}
+
+static int udc_read_urb_ep0(void)
+{
+ u32 *addr32 = (u32 *) &UDCDN(0);
+ u32 *data32 = (u32 *) ep0_urb->buffer;
+ u8 *addr8 = (u8 *) &UDCDN(0);
+ u8 *data8 = (u8 *) ep0_urb->buffer;
+ unsigned int i, n, w, b;
+
+ n = UDCBCR0;
+ w = n / 4;
+ b = n % 4;
+
+ for (i = 0; i < w; i++) {
+ data32[ep0_urb->actual_length/4 + i] = *addr32;
+ ep0_urb->actual_length += 4;
+ }
+
+ for (i = 0; i < b; i++) {
+ data8[ep0_urb->actual_length + w*4 + i] = *addr8;
+ ep0_urb->actual_length++;
+ }
+
+ UDCCSR0 = UDCCSR0_OPC | UDCCSR0_IPR;
+ if (ep0_urb->actual_length == ep0_urb->device_request.wLength)
+ return 1;
+
+ return 0;
+}
+
+static void udc_handle_ep0(struct usb_endpoint_instance *endpoint)
+{
+ u32 udccsr0 = UDCCSR0;
+ u32 *data = (u32 *) &ep0_urb->device_request;
+ int i;
+
+ usbdbg("udccsr0 %x", udccsr0);
+
+ /* Clear stall status */
+ if (udccsr0 & UDCCSR0_SST) {
+ usberr("clear stall status");
+ UDCCSR0 = UDCCSR0_SST;
+ ep0state = EP0_IDLE;
+ }
+
+ /* previous request unfinished? non-error iff back-to-back ... */
+ if ((udccsr0 & UDCCSR0_SA) != 0 && ep0state != EP0_IDLE)
+ ep0state = EP0_IDLE;
+
+ switch (ep0state) {
+
+ case EP0_IDLE:
+
+ udccsr0 = UDCCSR0;
+ /* Start control request? */
+ if ((udccsr0 & (UDCCSR0_OPC | UDCCSR0_SA | UDCCSR0_RNE))
+ == (UDCCSR0_OPC | UDCCSR0_SA | UDCCSR0_RNE)) {
+
+ /* Read SETUP packet.
+ * SETUP packet size is 8 bytes (aka 2 words)
+ */
+ usbdbg("try reading SETUP packet");
+ for (i = 0; i < 2; i++) {
+ if ((UDCCSR0 & UDCCSR0_RNE) == 0) {
+ usberr("setup packet too short:%d", i);
+ goto stall;
+ }
+ data[i] = UDCDR0;
+ }
+
+ UDCCSR0 |= (UDCCSR0_OPC | UDCCSR0_SA);
+ if ((UDCCSR0 & UDCCSR0_RNE) != 0) {
+ usberr("setup packet too long");
+ goto stall;
+ }
+
+ udc_dump_buffer("ep0 setup read", (u8 *) data, 8);
+
+ if (ep0_urb->device_request.wLength == 0) {
+ usbdbg("Zero Data control Packet\n");
+ if (ep0_recv_setup(ep0_urb)) {
+ usberr("Invalid Setup Packet\n");
+ udc_dump_buffer("ep0 setup read",
+ (u8 *)data, 8);
+ goto stall;
+ }
+ UDCCSR0 = UDCCSR0_IPR;
+ ep0state = EP0_IDLE;
+ } else {
+ /* Check direction */
+ if ((ep0_urb->device_request.bmRequestType &
+ USB_REQ_DIRECTION_MASK)
+ == USB_REQ_HOST2DEVICE) {
+ ep0state = EP0_OUT_DATA;
+ ep0_urb->buffer =
+ (u8 *)ep0_urb->buffer_data;
+ ep0_urb->buffer_length =
+ sizeof(ep0_urb->buffer_data);
+ ep0_urb->actual_length = 0;
+ UDCCSR0 = UDCCSR0_IPR;
+ } else {
+ /* The ep0_recv_setup function has
+ * already placed our response packet
+ * data in ep0_urb->buffer and the
+ * packet length in
+ * ep0_urb->actual_length.
+ */
+ if (ep0_recv_setup(ep0_urb)) {
+stall:
+ usberr("Invalid setup packet");
+ udc_dump_buffer("ep0 setup read"
+ , (u8 *) data, 8);
+ ep0state = EP0_IDLE;
+
+ UDCCSR0 = UDCCSR0_SA |
+ UDCCSR0_OPC | UDCCSR0_FST |
+ UDCCS0_FTF;
+
+ return;
+ }
+
+ endpoint->tx_urb = ep0_urb;
+ endpoint->sent = 0;
+ usbdbg("EP0_IN_DATA");
+ ep0state = EP0_IN_DATA;
+ if (udc_write_urb(endpoint) < 0)
+ goto stall;
+
+ }
+ }
+ return;
+ } else if ((udccsr0 & (UDCCSR0_OPC | UDCCSR0_SA))
+ == (UDCCSR0_OPC|UDCCSR0_SA)) {
+ usberr("Setup Active but no data. Stalling ....\n");
+ goto stall;
+ } else {
+ usbdbg("random early IRQs");
+ /* Some random early IRQs:
+ * - we acked FST
+ * - IPR cleared
+ * - OPC got set, without SA (likely status stage)
+ */
+ UDCCSR0 = udccsr0 & (UDCCSR0_SA | UDCCSR0_OPC);
+ }
+ break;
+
+ case EP0_OUT_DATA:
+
+ if ((udccsr0 & UDCCSR0_OPC) && !(udccsr0 & UDCCSR0_SA)) {
+ if (udc_read_urb_ep0()) {
+read_complete:
+ ep0state = EP0_IDLE;
+ if (ep0_recv_setup(ep0_urb)) {
+ /* Not a setup packet, stall next
+ * EP0 transaction
+ */
+ udc_dump_buffer("ep0 setup read",
+ (u8 *) data, 8);
+ usberr("can't parse setup packet\n");
+ goto stall;
+ }
+ }
+ } else if (!(udccsr0 & UDCCSR0_OPC) &&
+ !(udccsr0 & UDCCSR0_IPR)) {
+ if (ep0_urb->device_request.wLength ==
+ ep0_urb->actual_length)
+ goto read_complete;
+
+ usberr("Premature Status\n");
+ ep0state = EP0_IDLE;
+ }
+ break;
+
+ case EP0_IN_DATA:
+ /* GET_DESCRIPTOR etc */
+ if (udccsr0 & UDCCSR0_OPC) {
+ UDCCSR0 = UDCCSR0_OPC | UDCCSR0_FTF;
+ usberr("ep0in premature status");
+ ep0state = EP0_IDLE;
+ } else {
+ /* irq was IPR clearing */
+ if (udc_write_urb(endpoint) < 0) {
+ usberr("ep0_write_error\n");
+ goto stall;
+ }
+ }
+ break;
+
+ case EP0_XFER_COMPLETE:
+ UDCCSR0 = UDCCSR0_IPR;
+ ep0state = EP0_IDLE;
+ break;
+
+ default:
+ usbdbg("Default\n");
+ }
+ USIR0 = USIR0_IR0;
+}
+
+static void udc_handle_ep(struct usb_endpoint_instance *endpoint)
+{
+ int ep_addr = endpoint->endpoint_address;
+ int ep_num = ep_addr & USB_ENDPOINT_NUMBER_MASK;
+ int ep_isout = (ep_addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT;
+
+ u32 flags = UDCCSN(ep_num) & (UDCCSR_SST | UDCCSR_TRN);
+ if (flags)
+ UDCCSN(ep_num) = flags;
+
+ if (ep_isout)
+ udc_read_urb(endpoint);
+ else
+ udc_write_urb(endpoint);
+
+ UDCCSN(ep_num) = UDCCSR_PC;
+}
+
+static void udc_state_changed(void)
+{
+ int config, interface, alternate;
+
+ UDCCR |= UDCCR_SMAC;
+
+ config = (UDCCR & UDCCR_ACN) >> UDCCR_ACN_S;
+ interface = (UDCCR & UDCCR_AIN) >> UDCCR_AIN_S;
+ alternate = (UDCCR & UDCCR_AAISN) >> UDCCR_AAISN_S;
+
+ usbdbg("New UDC settings are: conf %d - inter %d - alter %d",
+ config, interface, alternate);
+
+ usbd_device_event_irq(udc_device, DEVICE_CONFIGURED, 0);
+ UDCISR1 = UDCISR1_IRCC;
+}
+
+void udc_irq(void)
+{
+ int handled;
+ struct usb_endpoint_instance *endpoint;
+ int ep_num, i;
+ u32 udcisr0;
+
+ do {
+ handled = 0;
+ /* Suspend Interrupt Request */
+ if (USIR1 & UDCCR_SUSIR) {
+ usbdbg("Suspend\n");
+ udc_ack_int_UDCCR(UDCCR_SUSIR);
+ handled = 1;
+ ep0state = EP0_IDLE;
+ }
+
+ /* Resume Interrupt Request */
+ if (USIR1 & UDCCR_RESIR) {
+ udc_ack_int_UDCCR(UDCCR_RESIR);
+ handled = 1;
+ usbdbg("USB resume\n");
+ }
+
+ if (USIR1 & (1<<31)) {
+ handled = 1;
+ udc_state_changed();
+ }
+
+ /* Reset Interrupt Request */
+ if (USIR1 & UDCCR_RSTIR) {
+ udc_ack_int_UDCCR(UDCCR_RSTIR);
+ handled = 1;
+ usbdbg("Reset\n");
+ usbd_device_event_irq(udc_device, DEVICE_RESET, 0);
+ } else {
+ if (USIR0)
+ usbdbg("UISR0: %x \n", USIR0);
+
+ if (USIR0 & 0x2)
+ USIR0 = 0x2;
+
+ /* Control traffic */
+ if (USIR0 & USIR0_IR0) {
+ handled = 1;
+ udc_handle_ep0(udc_device->bus->endpoint_array);
+ USIR0 = USIR0_IR0;
+ }
+
+ endpoint = udc_device->bus->endpoint_array;
+ for (i = 0; i < udc_device->bus->max_endpoints; i++) {
+ ep_num = (endpoint[i].endpoint_address) &
+ USB_ENDPOINT_NUMBER_MASK;
+ if (!ep_num)
+ continue;
+ udcisr0 = UDCISR0;
+ if (udcisr0 &
+ UDCISR_INT(ep_num, UDC_INT_PACKETCMP)) {
+ UDCISR0 = UDCISR_INT(ep_num,
+ UDC_INT_PACKETCMP);
+ udc_handle_ep(&endpoint[i]);
+ }
+ }
+ }
+
+ } while (handled);
+}
+
+/* The UDCCR reg contains mask and interrupt status bits,
+ * so using '|=' isn't safe as it may ack an interrupt.
+ */
+#define UDCCR_OEN (1 << 31) /* On-the-Go Enable */
+#define UDCCR_MASK_BITS (UDCCR_OEN | UDCCR_UDE)
+
+static inline void udc_set_mask_UDCCR(int mask)
+{
+ UDCCR = (UDCCR & UDCCR_MASK_BITS) | (mask & UDCCR_MASK_BITS);
+}
+
+static inline void udc_clear_mask_UDCCR(int mask)
+{
+ UDCCR = (UDCCR & UDCCR_MASK_BITS) & ~(mask & UDCCR_MASK_BITS);
+}
+
+static void pio_irq_enable(int ep_num)
+{
+ if (ep_num < 16)
+ UDCICR0 |= 3 << (ep_num * 2);
+ else {
+ ep_num -= 16;
+ UDCICR1 |= 3 << (ep_num * 2);
+ }
+}
+
+/*
+ * udc_set_nak
+ *
+ * Allow upper layers to signal lower layers should not accept more RX data
+ */
+void udc_set_nak(int ep_num)
+{
+ /* TODO */
+}
+
+/*
+ * udc_unset_nak
+ *
+ * Suspend sending of NAK tokens for DATA OUT tokens on a given endpoint.
+ * Switch off NAKing on this endpoint to accept more data output from host.
+ */
+void udc_unset_nak(int ep_num)
+{
+ /* TODO */
+}
+
+int udc_endpoint_write(struct usb_endpoint_instance *endpoint)
+{
+ return udc_write_urb(endpoint);
+}
+
+/* Associate a physical endpoint with endpoint instance */
+void udc_setup_ep(struct usb_device_instance *device, unsigned int id,
+ struct usb_endpoint_instance *endpoint)
+{
+ int ep_num, ep_addr, ep_isout, ep_type, ep_size;
+ int config, interface, alternate;
+ u32 tmp;
+
+ usbdbg("setting up endpoint id %d", id);
+
+ if (!endpoint) {
+ usberr("endpoint void!");
+ return;
+ }
+
+ ep_num = endpoint->endpoint_address & USB_ENDPOINT_NUMBER_MASK;
+ if (ep_num >= UDC_MAX_ENDPOINTS) {
+ usberr("unable to setup ep %d!", ep_num);
+ return;
+ }
+
+ pio_irq_enable(ep_num);
+ if (ep_num == 0) {
+ /* Done for ep0 */
+ return;
+ }
+
+ config = 1;
+ interface = 0;
+ alternate = 0;
+
+ usbdbg("config %d - interface %d - alternate %d",
+ config, interface, alternate);
+
+ ep_addr = endpoint->endpoint_address;
+ ep_num = ep_addr & USB_ENDPOINT_NUMBER_MASK;
+ ep_isout = (ep_addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT;
+ ep_type = ep_isout ? endpoint->rcv_attributes : endpoint->tx_attributes;
+ ep_size = ep_isout ? endpoint->rcv_packetSize : endpoint->tx_packetSize;
+
+ usbdbg("addr %x, num %d, dir %s, type %s, packet size %d",
+ ep_addr, ep_num,
+ ep_isout ? "out" : "in",
+ ep_type == USB_ENDPOINT_XFER_ISOC ? "isoc" :
+ ep_type == USB_ENDPOINT_XFER_BULK ? "bulk" :
+ ep_type == USB_ENDPOINT_XFER_INT ? "int" : "???",
+ ep_size
+ );
+
+ /* Configure UDCCRx */
+ tmp = 0;
+ tmp |= (config << UDCCONR_CN_S) & UDCCONR_CN;
+ tmp |= (interface << UDCCONR_IN_S) & UDCCONR_IN;
+ tmp |= (alternate << UDCCONR_AISN_S) & UDCCONR_AISN;
+ tmp |= (ep_num << UDCCONR_EN_S) & UDCCONR_EN;
+ tmp |= (ep_type << UDCCONR_ET_S) & UDCCONR_ET;
+ tmp |= ep_isout ? 0 : UDCCONR_ED;
+ tmp |= (ep_size << UDCCONR_MPS_S) & UDCCONR_MPS;
+ tmp |= UDCCONR_EE;
+
+ UDCCN(ep_num) = tmp;
+
+ usbdbg("UDCCR%c = %x", 'A' + ep_num-1, UDCCN(ep_num));
+ usbdbg("UDCCSR%c = %x", 'A' + ep_num-1, UDCCSN(ep_num));
+}
+
+#define CONFIG_USB_DEV_PULLUP_GPIO 87
+
+/* Connect the USB device to the bus */
+void udc_connect(void)
+{
+ usbdbg("UDC connect");
+
+ /* Turn on the USB connection by enabling the pullup resistor */
+ set_GPIO_mode(CONFIG_USB_DEV_PULLUP_GPIO | GPIO_OUT);
+ GPSR(CONFIG_USB_DEV_PULLUP_GPIO) = GPIO_bit(CONFIG_USB_DEV_PULLUP_GPIO);
+}
+
+/* Disconnect the USB device to the bus */
+void udc_disconnect(void)
+{
+ usbdbg("UDC disconnect");
+
+ /* Turn off the USB connection by disabling the pullup resistor */
+ GPCR(CONFIG_USB_DEV_PULLUP_GPIO) = GPIO_bit(CONFIG_USB_DEV_PULLUP_GPIO);
+}
+
+/* Switch on the UDC */
+void udc_enable(struct usb_device_instance *device)
+{
+
+ ep0state = EP0_IDLE;
+ CKEN |= CKEN11_USB;
+
+ /* enable endpoint 0, A, B's Packet Complete Interrupt. */
+ UDCICR0 = 0x0000003f;
+ UDCICR1 = 0xa8000000;
+
+ /* clear the interrupt status/control registers */
+ UDCISR0 = 0xffffffff;
+ UDCISR1 = 0xffffffff;
+
+ /* set UDC-enable */
+ udc_set_mask_UDCCR(UDCCR_UDE);
+
+ udc_device = device;
+ if (!ep0_urb)
+ ep0_urb = usbd_alloc_urb(udc_device,
+ udc_device->bus->endpoint_array);
+ else
+ usbinfo("ep0_urb %p already allocated", ep0_urb);
+
+ usbdbg("UDC Enabled\n");
+}
+
+/* Need to check this again */
+void udc_disable(void)
+{
+ usbdbg("disable UDC");
+
+ udc_clear_mask_UDCCR(UDCCR_UDE);
+
+ /* Disable clock for USB device */
+ CKEN &= ~CKEN11_USB;
+
+ /* Free ep0 URB */
+ if (ep0_urb) {
+ usbd_dealloc_urb(ep0_urb);
+ ep0_urb = NULL;
+ }
+
+ /* Reset device pointer */
+ udc_device = NULL;
+}
+
+/* Allow udc code to do any additional startup */
+void udc_startup_events(struct usb_device_instance *device)
+{
+ /* The DEVICE_INIT event puts the USB device in the state STATE_INIT */
+ usbd_device_event_irq(device, DEVICE_INIT, 0);
+
+ /* The DEVICE_CREATE event puts the USB device in the state
+ * STATE_ATTACHED */
+ usbd_device_event_irq(device, DEVICE_CREATE, 0);
+
+ /* Some USB controller driver implementations signal
+ * DEVICE_HUB_CONFIGURED and DEVICE_RESET events here.
+ * DEVICE_HUB_CONFIGURED causes a transition to the state
+ * STATE_POWERED, and DEVICE_RESET causes a transition to
+ * the state STATE_DEFAULT.
+ */
+ udc_enable(device);
+}
+
+/* Initialize h/w stuff */
+int udc_init(void)
+{
+ udc_device = NULL;
+ usbdbg("PXA27x usbd start");
+
+ /* Disable the UDC */
+ udc_clear_mask_UDCCR(UDCCR_UDE);
+
+ /* Disable clock for USB device */
+ CKEN &= ~CKEN11_USB;
+
+ /* Disable IRQs: we don't use them */
+ UDCICR0 = UDCICR1 = 0;
+
+ return 0;
+}