USB Gadget driver for Samsung s3c2410 ARM SoC
This patch adds the support for the Usb Device Controller on Samsung
S3C24xx SoCs. This driver passes all tests from testusb (including #13)
and has been tested on S3C2410, S3C24212, and S3C2440 SoCs.
Whitespace updates, minor cleanups by David
Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Cc: Herbert Pötzl <herbert@13thfloor.at>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/gadget/s3c2410_udc.c b/drivers/usb/gadget/s3c2410_udc.c
new file mode 100644
index 0000000..d60748a
--- /dev/null
+++ b/drivers/usb/gadget/s3c2410_udc.c
@@ -0,0 +1,2078 @@
+/*
+ * linux/drivers/usb/gadget/s3c2410_udc.c
+ *
+ * Samsung S3C24xx series on-chip full speed USB device controllers
+ *
+ * Copyright (C) 2004-2007 Herbert Pötzl - Arnaud Patard
+ * Additional cleanups by Ben Dooks <ben-linux@fluff.org>
+ *
+ * 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 <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/ioport.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/smp_lock.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/timer.h>
+#include <linux/list.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/version.h>
+#include <linux/clk.h>
+
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+#include <linux/usb.h>
+#include <linux/usb_gadget.h>
+
+#include <asm/byteorder.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/system.h>
+#include <asm/unaligned.h>
+#include <asm/arch/irqs.h>
+
+#include <asm/arch/hardware.h>
+#include <asm/arch/regs-clock.h>
+#include <asm/arch/regs-gpio.h>
+#include <asm/arch/regs-udc.h>
+#include <asm/arch/udc.h>
+
+#include <asm/mach-types.h>
+
+#include "s3c2410_udc.h"
+
+#define DRIVER_DESC "S3C2410 USB Device Controller Gadget"
+#define DRIVER_VERSION "29 Apr 2007"
+#define DRIVER_AUTHOR "Herbert Pötzl <herbert@13thfloor.at>, " \
+ "Arnaud Patard <arnaud.patard@rtp-net.org>"
+
+static const char gadget_name[] = "s3c2410_udc";
+static const char driver_desc[] = DRIVER_DESC;
+
+static struct s3c2410_udc *the_controller;
+static struct clk *udc_clock;
+static struct clk *usb_bus_clock;
+static void __iomem *base_addr;
+static u64 rsrc_start;
+static u64 rsrc_len;
+static struct dentry *s3c2410_udc_debugfs_root;
+
+static inline u32 udc_read(u32 reg)
+{
+ return readb(base_addr + reg);
+}
+
+static inline void udc_write(u32 value, u32 reg)
+{
+ writeb(value, base_addr + reg);
+}
+
+static inline void udc_writeb(void __iomem *base, u32 value, u32 reg)
+{
+ writeb(value, base + reg);
+}
+
+static struct s3c2410_udc_mach_info *udc_info;
+
+/*************************** DEBUG FUNCTION ***************************/
+#define DEBUG_NORMAL 1
+#define DEBUG_VERBOSE 2
+
+#ifdef CONFIG_USB_S3C2410_DEBUG
+#define USB_S3C2410_DEBUG_LEVEL 0
+
+static uint32_t s3c2410_ticks = 0;
+
+static int dprintk(int level, const char *fmt, ...)
+{
+ static char printk_buf[1024];
+ static long prevticks;
+ static int invocation;
+ va_list args;
+ int len;
+
+ if (level > USB_S3C2410_DEBUG_LEVEL)
+ return 0;
+
+ if (s3c2410_ticks != prevticks) {
+ prevticks = s3c2410_ticks;
+ invocation = 0;
+ }
+
+ len = scnprintf(printk_buf,
+ sizeof(printk_buf), "%1lu.%02d USB: ",
+ prevticks, invocation++);
+
+ va_start(args, fmt);
+ len = vscnprintf(printk_buf+len,
+ sizeof(printk_buf)-len, fmt, args);
+ va_end(args);
+
+ return printk(KERN_DEBUG "%s", printk_buf);
+}
+#else
+static int dprintk(int level, const char *fmt, ...)
+{
+ return 0;
+}
+#endif
+static int s3c2410_udc_debugfs_seq_show(struct seq_file *m, void *p)
+{
+ u32 addr_reg,pwr_reg,ep_int_reg,usb_int_reg;
+ u32 ep_int_en_reg, usb_int_en_reg, ep0_csr;
+ u32 ep1_i_csr1,ep1_i_csr2,ep1_o_csr1,ep1_o_csr2;
+ u32 ep2_i_csr1,ep2_i_csr2,ep2_o_csr1,ep2_o_csr2;
+
+ addr_reg = udc_read(S3C2410_UDC_FUNC_ADDR_REG);
+ pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
+ ep_int_reg = udc_read(S3C2410_UDC_EP_INT_REG);
+ usb_int_reg = udc_read(S3C2410_UDC_USB_INT_REG);
+ ep_int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
+ usb_int_en_reg = udc_read(S3C2410_UDC_USB_INT_EN_REG);
+ udc_write(0, S3C2410_UDC_INDEX_REG);
+ ep0_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
+ udc_write(1, S3C2410_UDC_INDEX_REG);
+ ep1_i_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
+ ep1_i_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
+ ep1_o_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
+ ep1_o_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
+ udc_write(2, S3C2410_UDC_INDEX_REG);
+ ep2_i_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
+ ep2_i_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
+ ep2_o_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
+ ep2_o_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
+
+ seq_printf(m, "FUNC_ADDR_REG : 0x%04X\n"
+ "PWR_REG : 0x%04X\n"
+ "EP_INT_REG : 0x%04X\n"
+ "USB_INT_REG : 0x%04X\n"
+ "EP_INT_EN_REG : 0x%04X\n"
+ "USB_INT_EN_REG : 0x%04X\n"
+ "EP0_CSR : 0x%04X\n"
+ "EP1_I_CSR1 : 0x%04X\n"
+ "EP1_I_CSR2 : 0x%04X\n"
+ "EP1_O_CSR1 : 0x%04X\n"
+ "EP1_O_CSR2 : 0x%04X\n"
+ "EP2_I_CSR1 : 0x%04X\n"
+ "EP2_I_CSR2 : 0x%04X\n"
+ "EP2_O_CSR1 : 0x%04X\n"
+ "EP2_O_CSR2 : 0x%04X\n",
+ addr_reg,pwr_reg,ep_int_reg,usb_int_reg,
+ ep_int_en_reg, usb_int_en_reg, ep0_csr,
+ ep1_i_csr1,ep1_i_csr2,ep1_o_csr1,ep1_o_csr2,
+ ep2_i_csr1,ep2_i_csr2,ep2_o_csr1,ep2_o_csr2
+ );
+
+ return 0;
+}
+
+static int s3c2410_udc_debugfs_fops_open(struct inode *inode,
+ struct file *file)
+{
+ return single_open(file, s3c2410_udc_debugfs_seq_show, NULL);
+}
+
+static const struct file_operations s3c2410_udc_debugfs_fops = {
+ .open = s3c2410_udc_debugfs_fops_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .owner = THIS_MODULE,
+};
+
+/* io macros */
+
+static inline void s3c2410_udc_clear_ep0_opr(void __iomem *base)
+{
+ udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
+ udc_writeb(base, S3C2410_UDC_EP0_CSR_SOPKTRDY,
+ S3C2410_UDC_EP0_CSR_REG);
+}
+
+static inline void s3c2410_udc_clear_ep0_sst(void __iomem *base)
+{
+ udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
+ writeb(0x00, base + S3C2410_UDC_EP0_CSR_REG);
+}
+
+static inline void s3c2410_udc_clear_ep0_se(void __iomem *base)
+{
+ udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
+ udc_writeb(base, S3C2410_UDC_EP0_CSR_SSE, S3C2410_UDC_EP0_CSR_REG);
+}
+
+static inline void s3c2410_udc_set_ep0_ipr(void __iomem *base)
+{
+ udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
+ udc_writeb(base, S3C2410_UDC_EP0_CSR_IPKRDY, S3C2410_UDC_EP0_CSR_REG);
+}
+
+static inline void s3c2410_udc_set_ep0_de(void __iomem *base)
+{
+ udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
+ udc_writeb(base, S3C2410_UDC_EP0_CSR_DE, S3C2410_UDC_EP0_CSR_REG);
+}
+
+inline void s3c2410_udc_set_ep0_ss(void __iomem *b)
+{
+ udc_writeb(b, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
+ udc_writeb(b, S3C2410_UDC_EP0_CSR_SENDSTL, S3C2410_UDC_EP0_CSR_REG);
+}
+
+static inline void s3c2410_udc_set_ep0_de_out(void __iomem *base)
+{
+ udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
+
+ udc_writeb(base,(S3C2410_UDC_EP0_CSR_SOPKTRDY
+ | S3C2410_UDC_EP0_CSR_DE),
+ S3C2410_UDC_EP0_CSR_REG);
+}
+
+static inline void s3c2410_udc_set_ep0_sse_out(void __iomem *base)
+{
+ udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
+ udc_writeb(base, (S3C2410_UDC_EP0_CSR_SOPKTRDY
+ | S3C2410_UDC_EP0_CSR_SSE),
+ S3C2410_UDC_EP0_CSR_REG);
+}
+
+static inline void s3c2410_udc_set_ep0_de_in(void __iomem *base)
+{
+ udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
+ udc_writeb(base, (S3C2410_UDC_EP0_CSR_IPKRDY
+ | S3C2410_UDC_EP0_CSR_DE),
+ S3C2410_UDC_EP0_CSR_REG);
+}
+
+/*------------------------- I/O ----------------------------------*/
+
+/*
+ * s3c2410_udc_done
+ */
+static void s3c2410_udc_done(struct s3c2410_ep *ep,
+ struct s3c2410_request *req, int status)
+{
+ unsigned halted = ep->halted;
+
+ list_del_init(&req->queue);
+
+ if (likely (req->req.status == -EINPROGRESS))
+ req->req.status = status;
+ else
+ status = req->req.status;
+
+ ep->halted = 1;
+ req->req.complete(&ep->ep, &req->req);
+ ep->halted = halted;
+}
+
+static void s3c2410_udc_nuke(struct s3c2410_udc *udc,
+ struct s3c2410_ep *ep, int status)
+{
+ /* Sanity check */
+ if (&ep->queue == NULL)
+ return;
+
+ while (!list_empty (&ep->queue)) {
+ struct s3c2410_request *req;
+ req = list_entry (ep->queue.next, struct s3c2410_request,
+ queue);
+ s3c2410_udc_done(ep, req, status);
+ }
+}
+
+static inline void s3c2410_udc_clear_ep_state(struct s3c2410_udc *dev)
+{
+ unsigned i;
+
+ /* hardware SET_{CONFIGURATION,INTERFACE} automagic resets endpoint
+ * fifos, and pending transactions mustn't be continued in any case.
+ */
+
+ for (i = 1; i < S3C2410_ENDPOINTS; i++)
+ s3c2410_udc_nuke(dev, &dev->ep[i], -ECONNABORTED);
+}
+
+static inline int s3c2410_udc_fifo_count_out(void)
+{
+ int tmp;
+
+ tmp = udc_read(S3C2410_UDC_OUT_FIFO_CNT2_REG) << 8;
+ tmp |= udc_read(S3C2410_UDC_OUT_FIFO_CNT1_REG);
+ return tmp;
+}
+
+/*
+ * s3c2410_udc_write_packet
+ */
+static inline int s3c2410_udc_write_packet(int fifo,
+ struct s3c2410_request *req,
+ unsigned max)
+{
+ unsigned len = min(req->req.length - req->req.actual, max);
+ u8 *buf = req->req.buf + req->req.actual;
+
+ prefetch(buf);
+
+ dprintk(DEBUG_VERBOSE, "%s %d %d %d %d\n", __func__,
+ req->req.actual, req->req.length, len, req->req.actual + len);
+
+ req->req.actual += len;
+
+ udelay(5);
+ writesb(base_addr + fifo, buf, len);
+ return len;
+}
+
+/*
+ * s3c2410_udc_write_fifo
+ *
+ * return: 0 = still running, 1 = completed, negative = errno
+ */
+static int s3c2410_udc_write_fifo(struct s3c2410_ep *ep,
+ struct s3c2410_request *req)
+{
+ unsigned count;
+ int is_last;
+ u32 idx;
+ int fifo_reg;
+ u32 ep_csr;
+
+ idx = ep->bEndpointAddress & 0x7F;
+ switch (idx) {
+ default:
+ idx = 0;
+ case 0:
+ fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
+ break;
+ case 1:
+ fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
+ break;
+ case 2:
+ fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
+ break;
+ case 3:
+ fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
+ break;
+ case 4:
+ fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
+ break;
+ }
+
+ count = s3c2410_udc_write_packet(fifo_reg, req, ep->ep.maxpacket);
+
+ /* 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 = 0;
+ else
+ is_last = 2;
+
+ /* Only ep0 debug messages are interesting */
+ if (idx == 0)
+ dprintk(DEBUG_NORMAL,
+ "Written ep%d %d.%d of %d b [last %d,z %d]\n",
+ idx, count, req->req.actual, req->req.length,
+ is_last, req->req.zero);
+
+ if (is_last) {
+ /* The order is important. It prevents sending 2 packets
+ * at the same time */
+
+ if (idx == 0) {
+ /* Reset signal => no need to say 'data sent' */
+ if (! (udc_read(S3C2410_UDC_USB_INT_REG)
+ & S3C2410_UDC_USBINT_RESET))
+ s3c2410_udc_set_ep0_de_in(base_addr);
+ ep->dev->ep0state=EP0_IDLE;
+ } else {
+ udc_write(idx, S3C2410_UDC_INDEX_REG);
+ ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
+ udc_write(idx, S3C2410_UDC_INDEX_REG);
+ udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
+ S3C2410_UDC_IN_CSR1_REG);
+ }
+
+ s3c2410_udc_done(ep, req, 0);
+ is_last = 1;
+ } else {
+ if (idx == 0) {
+ /* Reset signal => no need to say 'data sent' */
+ if (! (udc_read(S3C2410_UDC_USB_INT_REG)
+ & S3C2410_UDC_USBINT_RESET))
+ s3c2410_udc_set_ep0_ipr(base_addr);
+ } else {
+ udc_write(idx, S3C2410_UDC_INDEX_REG);
+ ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
+ udc_write(idx, S3C2410_UDC_INDEX_REG);
+ udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
+ S3C2410_UDC_IN_CSR1_REG);
+ }
+ }
+
+ return is_last;
+}
+
+static inline int s3c2410_udc_read_packet(int fifo, u8 *buf,
+ struct s3c2410_request *req, unsigned avail)
+{
+ unsigned len;
+
+ len = min(req->req.length - req->req.actual, avail);
+ req->req.actual += len;
+
+ readsb(fifo + base_addr, buf, len);
+ return len;
+}
+
+/*
+ * return: 0 = still running, 1 = queue empty, negative = errno
+ */
+static int s3c2410_udc_read_fifo(struct s3c2410_ep *ep,
+ struct s3c2410_request *req)
+{
+ u8 *buf;
+ u32 ep_csr;
+ unsigned bufferspace;
+ int is_last=1;
+ unsigned avail;
+ int fifo_count = 0;
+ u32 idx;
+ int fifo_reg;
+
+ idx = ep->bEndpointAddress & 0x7F;
+
+ switch (idx) {
+ default:
+ idx = 0;
+ case 0:
+ fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
+ break;
+ case 1:
+ fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
+ break;
+ case 2:
+ fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
+ break;
+ case 3:
+ fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
+ break;
+ case 4:
+ fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
+ break;
+ }
+
+ if (!req->req.length)
+ return 1;
+
+ buf = req->req.buf + req->req.actual;
+ bufferspace = req->req.length - req->req.actual;
+ if (!bufferspace) {
+ dprintk(DEBUG_NORMAL, "%s: buffer full!\n", __func__);
+ return -1;
+ }
+
+ udc_write(idx, S3C2410_UDC_INDEX_REG);
+
+ fifo_count = s3c2410_udc_fifo_count_out();
+ dprintk(DEBUG_NORMAL, "%s fifo count : %d\n", __func__, fifo_count);
+
+ if (fifo_count > ep->ep.maxpacket)
+ avail = ep->ep.maxpacket;
+ else
+ avail = fifo_count;
+
+ fifo_count = s3c2410_udc_read_packet(fifo_reg, buf, req, avail);
+
+ /* checking this with ep0 is not accurate as we already
+ * read a control request
+ **/
+ if (idx != 0 && fifo_count < ep->ep.maxpacket) {
+ is_last = 1;
+ /* overflowed this request? flush extra data */
+ if (fifo_count != avail)
+ req->req.status = -EOVERFLOW;
+ } else {
+ is_last = (req->req.length <= req->req.actual) ? 1 : 0;
+ }
+
+ udc_write(idx, S3C2410_UDC_INDEX_REG);
+ fifo_count = s3c2410_udc_fifo_count_out();
+
+ /* Only ep0 debug messages are interesting */
+ if (idx == 0)
+ dprintk(DEBUG_VERBOSE, "%s fifo count : %d [last %d]\n",
+ __func__, fifo_count,is_last);
+
+ if (is_last) {
+ if (idx == 0) {
+ s3c2410_udc_set_ep0_de_out(base_addr);
+ ep->dev->ep0state = EP0_IDLE;
+ } else {
+ udc_write(idx, S3C2410_UDC_INDEX_REG);
+ ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
+ udc_write(idx, S3C2410_UDC_INDEX_REG);
+ udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
+ S3C2410_UDC_OUT_CSR1_REG);
+ }
+
+ s3c2410_udc_done(ep, req, 0);
+ } else {
+ if (idx == 0) {
+ s3c2410_udc_clear_ep0_opr(base_addr);
+ } else {
+ udc_write(idx, S3C2410_UDC_INDEX_REG);
+ ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
+ udc_write(idx, S3C2410_UDC_INDEX_REG);
+ udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
+ S3C2410_UDC_OUT_CSR1_REG);
+ }
+ }
+
+ return is_last;
+}
+
+static int s3c2410_udc_read_fifo_crq(struct usb_ctrlrequest *crq)
+{
+ unsigned char *outbuf = (unsigned char*)crq;
+ int bytes_read = 0;
+
+ udc_write(0, S3C2410_UDC_INDEX_REG);
+
+ bytes_read = s3c2410_udc_fifo_count_out();
+
+ dprintk(DEBUG_NORMAL, "%s: fifo_count=%d\n", __func__, bytes_read);
+
+ if (bytes_read > sizeof(struct usb_ctrlrequest))
+ bytes_read = sizeof(struct usb_ctrlrequest);
+
+ readsb(S3C2410_UDC_EP0_FIFO_REG + base_addr, outbuf, bytes_read);
+
+ dprintk(DEBUG_VERBOSE, "%s: len=%d %02x:%02x {%x,%x,%x}\n", __func__,
+ bytes_read, crq->bRequest, crq->bRequestType,
+ crq->wValue, crq->wIndex, crq->wLength);
+
+ return bytes_read;
+}
+
+static int s3c2410_udc_get_status(struct s3c2410_udc *dev,
+ struct usb_ctrlrequest *crq)
+{
+ u16 status = 0;
+ u8 ep_num = crq->wIndex & 0x7F;
+ u8 is_in = crq->wIndex & USB_DIR_IN;
+
+ switch (crq->bRequestType & USB_RECIP_MASK) {
+ case USB_RECIP_INTERFACE:
+ break;
+
+ case USB_RECIP_DEVICE:
+ status = dev->devstatus;
+ break;
+
+ case USB_RECIP_ENDPOINT:
+ if (ep_num > 4 || crq->wLength > 2)
+ return 1;
+
+ if (ep_num == 0) {
+ udc_write(0, S3C2410_UDC_INDEX_REG);
+ status = udc_read(S3C2410_UDC_IN_CSR1_REG);
+ status = status & S3C2410_UDC_EP0_CSR_SENDSTL;
+ } else {
+ udc_write(ep_num, S3C2410_UDC_INDEX_REG);
+ if (is_in) {
+ status = udc_read(S3C2410_UDC_IN_CSR1_REG);
+ status = status & S3C2410_UDC_ICSR1_SENDSTL;
+ } else {
+ status = udc_read(S3C2410_UDC_OUT_CSR1_REG);
+ status = status & S3C2410_UDC_OCSR1_SENDSTL;
+ }
+ }
+
+ status = status ? 1 : 0;
+ break;
+
+ default:
+ return 1;
+ }
+
+ /* Seems to be needed to get it working. ouch :( */
+ udelay(5);
+ udc_write(status & 0xFF, S3C2410_UDC_EP0_FIFO_REG);
+ udc_write(status >> 8, S3C2410_UDC_EP0_FIFO_REG);
+ s3c2410_udc_set_ep0_de_in(base_addr);
+
+ return 0;
+}
+/*------------------------- usb state machine -------------------------------*/
+static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value);
+
+static void s3c2410_udc_handle_ep0_idle(struct s3c2410_udc *dev,
+ struct s3c2410_ep *ep,
+ struct usb_ctrlrequest *crq,
+ u32 ep0csr)
+{
+ int len, ret, tmp;
+
+ /* start control request? */
+ if (!(ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY))
+ return;
+
+ s3c2410_udc_nuke(dev, ep, -EPROTO);
+
+ len = s3c2410_udc_read_fifo_crq(crq);
+ if (len != sizeof(*crq)) {
+ dprintk(DEBUG_NORMAL, "setup begin: fifo READ ERROR"
+ " wanted %d bytes got %d. Stalling out...\n",
+ sizeof(*crq), len);
+ s3c2410_udc_set_ep0_ss(base_addr);
+ return;
+ }
+
+ dprintk(DEBUG_NORMAL, "bRequest = %d bRequestType %d wLength = %d\n",
+ crq->bRequest, crq->bRequestType, crq->wLength);
+
+ /* cope with automagic for some standard requests. */
+ dev->req_std = (crq->bRequestType & USB_TYPE_MASK)
+ == USB_TYPE_STANDARD;
+ dev->req_config = 0;
+ dev->req_pending = 1;
+
+ switch (crq->bRequest) {
+ case USB_REQ_SET_CONFIGURATION:
+ dprintk(DEBUG_NORMAL, "USB_REQ_SET_CONFIGURATION ... \n");
+
+ if (crq->bRequestType == USB_RECIP_DEVICE) {
+ dev->req_config = 1;
+ s3c2410_udc_set_ep0_de_out(base_addr);
+ }
+ break;
+
+ case USB_REQ_SET_INTERFACE:
+ dprintk(DEBUG_NORMAL, "USB_REQ_SET_INTERFACE ... \n");
+
+ if (crq->bRequestType == USB_RECIP_INTERFACE) {
+ dev->req_config = 1;
+ s3c2410_udc_set_ep0_de_out(base_addr);
+ }
+ break;
+
+ case USB_REQ_SET_ADDRESS:
+ dprintk(DEBUG_NORMAL, "USB_REQ_SET_ADDRESS ... \n");
+
+ if (crq->bRequestType == USB_RECIP_DEVICE) {
+ tmp = crq->wValue & 0x7F;
+ dev->address = tmp;
+ udc_write((tmp | S3C2410_UDC_FUNCADDR_UPDATE),
+ S3C2410_UDC_FUNC_ADDR_REG);
+ s3c2410_udc_set_ep0_de_out(base_addr);
+ return;
+ }
+ break;
+
+ case USB_REQ_GET_STATUS:
+ dprintk(DEBUG_NORMAL, "USB_REQ_GET_STATUS ... \n");
+ s3c2410_udc_clear_ep0_opr(base_addr);
+
+ if (dev->req_std) {
+ if (!s3c2410_udc_get_status(dev, crq)) {
+ return;
+ }
+ }
+ break;
+
+ case USB_REQ_CLEAR_FEATURE:
+ s3c2410_udc_clear_ep0_opr(base_addr);
+
+ if (crq->bRequestType != USB_RECIP_ENDPOINT)
+ break;
+
+ if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
+ break;
+
+ s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 0);
+ s3c2410_udc_set_ep0_de_out(base_addr);
+ return;
+
+ case USB_REQ_SET_FEATURE:
+ s3c2410_udc_clear_ep0_opr(base_addr);
+
+ if (crq->bRequestType != USB_RECIP_ENDPOINT)
+ break;
+
+ if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
+ break;
+
+ s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 1);
+ s3c2410_udc_set_ep0_de_out(base_addr);
+ return;
+
+ default:
+ s3c2410_udc_clear_ep0_opr(base_addr);
+ break;
+ }
+
+ if (crq->bRequestType & USB_DIR_IN)
+ dev->ep0state = EP0_IN_DATA_PHASE;
+ else
+ dev->ep0state = EP0_OUT_DATA_PHASE;
+
+ ret = dev->driver->setup(&dev->gadget, crq);
+ if (ret < 0) {
+ if (dev->req_config) {
+ dprintk(DEBUG_NORMAL, "config change %02x fail %d?\n",
+ crq->bRequest, ret);
+ return;
+ }
+
+ if (ret == -EOPNOTSUPP)
+ dprintk(DEBUG_NORMAL, "Operation not supported\n");
+ else
+ dprintk(DEBUG_NORMAL,
+ "dev->driver->setup failed. (%d)\n", ret);
+
+ udelay(5);
+ s3c2410_udc_set_ep0_ss(base_addr);
+ s3c2410_udc_set_ep0_de_out(base_addr);
+ dev->ep0state = EP0_IDLE;
+ /* deferred i/o == no response yet */
+ } else if (dev->req_pending) {
+ dprintk(DEBUG_VERBOSE, "dev->req_pending... what now?\n");
+ dev->req_pending=0;
+ }
+
+ dprintk(DEBUG_VERBOSE, "ep0state %s\n", ep0states[dev->ep0state]);
+}
+
+static void s3c2410_udc_handle_ep0(struct s3c2410_udc *dev)
+{
+ u32 ep0csr;
+ struct s3c2410_ep *ep = &dev->ep[0];
+ struct s3c2410_request *req;
+ struct usb_ctrlrequest crq;
+
+ if (list_empty(&ep->queue))
+ req = NULL;
+ else
+ req = list_entry(ep->queue.next, struct s3c2410_request, queue);
+
+ /* We make the assumption that S3C2410_UDC_IN_CSR1_REG equal to
+ * S3C2410_UDC_EP0_CSR_REG when index is zero */
+
+ udc_write(0, S3C2410_UDC_INDEX_REG);
+ ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
+
+ dprintk(DEBUG_NORMAL, "ep0csr %x ep0state %s\n",
+ ep0csr, ep0states[dev->ep0state]);
+
+ /* clear stall status */
+ if (ep0csr & S3C2410_UDC_EP0_CSR_SENTSTL) {
+ s3c2410_udc_nuke(dev, ep, -EPIPE);
+ dprintk(DEBUG_NORMAL, "... clear SENT_STALL ...\n");
+ s3c2410_udc_clear_ep0_sst(base_addr);
+ dev->ep0state = EP0_IDLE;
+ return;
+ }
+
+ /* clear setup end */
+ if (ep0csr & S3C2410_UDC_EP0_CSR_SE) {
+ dprintk(DEBUG_NORMAL, "... serviced SETUP_END ...\n");
+ s3c2410_udc_nuke(dev, ep, 0);
+ s3c2410_udc_clear_ep0_se(base_addr);
+ dev->ep0state = EP0_IDLE;
+ }
+
+ switch (dev->ep0state) {
+ case EP0_IDLE:
+ s3c2410_udc_handle_ep0_idle(dev, ep, &crq, ep0csr);
+ break;
+
+ case EP0_IN_DATA_PHASE: /* GET_DESCRIPTOR etc */
+ dprintk(DEBUG_NORMAL, "EP0_IN_DATA_PHASE ... what now?\n");
+ if (!(ep0csr & S3C2410_UDC_EP0_CSR_IPKRDY) && req) {
+ s3c2410_udc_write_fifo(ep, req);
+ }
+ break;
+
+ case EP0_OUT_DATA_PHASE: /* SET_DESCRIPTOR etc */
+ dprintk(DEBUG_NORMAL, "EP0_OUT_DATA_PHASE ... what now?\n");
+ if ((ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY) && req ) {
+ s3c2410_udc_read_fifo(ep,req);
+ }
+ break;
+
+ case EP0_END_XFER:
+ dprintk(DEBUG_NORMAL, "EP0_END_XFER ... what now?\n");
+ dev->ep0state = EP0_IDLE;
+ break;
+
+ case EP0_STALL:
+ dprintk(DEBUG_NORMAL, "EP0_STALL ... what now?\n");
+ dev->ep0state = EP0_IDLE;
+ break;
+ }
+}
+
+/*
+ * handle_ep - Manage I/O endpoints
+ */
+
+static void s3c2410_udc_handle_ep(struct s3c2410_ep *ep)
+{
+ struct s3c2410_request *req;
+ int is_in = ep->bEndpointAddress & USB_DIR_IN;
+ u32 ep_csr1;
+ u32 idx;
+
+ if (likely (!list_empty(&ep->queue)))
+ req = list_entry(ep->queue.next,
+ struct s3c2410_request, queue);
+ else
+ req = NULL;
+
+ idx = ep->bEndpointAddress & 0x7F;
+
+ if (is_in) {
+ udc_write(idx, S3C2410_UDC_INDEX_REG);
+ ep_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
+ dprintk(DEBUG_VERBOSE, "ep%01d write csr:%02x %d\n",
+ idx, ep_csr1, req ? 1 : 0);
+
+ if (ep_csr1 & S3C2410_UDC_ICSR1_SENTSTL) {
+ dprintk(DEBUG_VERBOSE, "st\n");
+ udc_write(idx, S3C2410_UDC_INDEX_REG);
+ udc_write(ep_csr1 & ~S3C2410_UDC_ICSR1_SENTSTL,
+ S3C2410_UDC_IN_CSR1_REG);
+ return;
+ }
+
+ if (!(ep_csr1 & S3C2410_UDC_ICSR1_PKTRDY) && req) {
+ s3c2410_udc_write_fifo(ep,req);
+ }
+ } else {
+ udc_write(idx, S3C2410_UDC_INDEX_REG);
+ ep_csr1 = udc_read(S3C2410_UDC_OUT_CSR1_REG);
+ dprintk(DEBUG_VERBOSE, "ep%01d rd csr:%02x\n", idx, ep_csr1);
+
+ if (ep_csr1 & S3C2410_UDC_OCSR1_SENTSTL) {
+ udc_write(idx, S3C2410_UDC_INDEX_REG);
+ udc_write(ep_csr1 & ~S3C2410_UDC_OCSR1_SENTSTL,
+ S3C2410_UDC_OUT_CSR1_REG);
+ return;
+ }
+
+ if ((ep_csr1 & S3C2410_UDC_OCSR1_PKTRDY) && req) {
+ s3c2410_udc_read_fifo(ep,req);
+ }
+ }
+}
+
+#include <asm/arch/regs-irq.h>
+
+/*
+ * s3c2410_udc_irq - interrupt handler
+ */
+static irqreturn_t s3c2410_udc_irq(int irq, void *_dev)
+{
+ struct s3c2410_udc *dev = _dev;
+ int usb_status;
+ int usbd_status;
+ int pwr_reg;
+ int ep0csr;
+ int i;
+ u32 idx;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->lock, flags);
+
+ /* Driver connected ? */
+ if (!dev->driver) {
+ /* Clear interrupts */
+ udc_write(udc_read(S3C2410_UDC_USB_INT_REG),
+ S3C2410_UDC_USB_INT_REG);
+ udc_write(udc_read(S3C2410_UDC_EP_INT_REG),
+ S3C2410_UDC_EP_INT_REG);
+ }
+
+ /* Save index */
+ idx = udc_read(S3C2410_UDC_INDEX_REG);
+
+ /* Read status registers */
+ usb_status = udc_read(S3C2410_UDC_USB_INT_REG);
+ usbd_status = udc_read(S3C2410_UDC_EP_INT_REG);
+ pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
+
+ udc_writeb(base_addr, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
+ ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
+
+ dprintk(DEBUG_NORMAL, "usbs=%02x, usbds=%02x, pwr=%02x ep0csr=%02x\n",
+ usb_status, usbd_status, pwr_reg, ep0csr);
+
+ /*
+ * Now, handle interrupts. There's two types :
+ * - Reset, Resume, Suspend coming -> usb_int_reg
+ * - EP -> ep_int_reg
+ */
+
+ /* RESET */
+ if (usb_status & S3C2410_UDC_USBINT_RESET) {
+ /* two kind of reset :
+ * - reset start -> pwr reg = 8
+ * - reset end -> pwr reg = 0
+ **/
+ dprintk(DEBUG_NORMAL, "USB reset csr %x pwr %x\n",
+ ep0csr, pwr_reg);
+
+ dev->gadget.speed = USB_SPEED_UNKNOWN;
+ udc_write(0x00, S3C2410_UDC_INDEX_REG);
+ udc_write((dev->ep[0].ep.maxpacket & 0x7ff) >> 3,
+ S3C2410_UDC_MAXP_REG);
+ dev->address = 0;
+
+ dev->ep0state = EP0_IDLE;
+ dev->gadget.speed = USB_SPEED_FULL;
+
+ /* clear interrupt */
+ udc_write(S3C2410_UDC_USBINT_RESET,
+ S3C2410_UDC_USB_INT_REG);
+
+ udc_write(idx, S3C2410_UDC_INDEX_REG);
+ spin_unlock_irqrestore(&dev->lock, flags);
+ return IRQ_HANDLED;
+ }
+
+ /* RESUME */
+ if (usb_status & S3C2410_UDC_USBINT_RESUME) {
+ dprintk(DEBUG_NORMAL, "USB resume\n");
+
+ /* clear interrupt */
+ udc_write(S3C2410_UDC_USBINT_RESUME,
+ S3C2410_UDC_USB_INT_REG);
+
+ if (dev->gadget.speed != USB_SPEED_UNKNOWN
+ && dev->driver
+ && dev->driver->resume)
+ dev->driver->resume(&dev->gadget);
+ }
+
+ /* SUSPEND */
+ if (usb_status & S3C2410_UDC_USBINT_SUSPEND) {
+ dprintk(DEBUG_NORMAL, "USB suspend\n");
+
+ /* clear interrupt */
+ udc_write(S3C2410_UDC_USBINT_SUSPEND,
+ S3C2410_UDC_USB_INT_REG);
+
+ if (dev->gadget.speed != USB_SPEED_UNKNOWN
+ && dev->driver
+ && dev->driver->suspend)
+ dev->driver->suspend(&dev->gadget);
+
+ dev->ep0state = EP0_IDLE;
+ }
+
+ /* EP */
+ /* control traffic */
+ /* check on ep0csr != 0 is not a good idea as clearing in_pkt_ready
+ * generate an interrupt
+ */
+ if (usbd_status & S3C2410_UDC_INT_EP0) {
+ dprintk(DEBUG_VERBOSE, "USB ep0 irq\n");
+ /* Clear the interrupt bit by setting it to 1 */
+ udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_REG);
+ s3c2410_udc_handle_ep0(dev);
+ }
+
+ /* endpoint data transfers */
+ for (i = 1; i < S3C2410_ENDPOINTS; i++) {
+ u32 tmp = 1 << i;
+ if (usbd_status & tmp) {
+ dprintk(DEBUG_VERBOSE, "USB ep%d irq\n", i);
+
+ /* Clear the interrupt bit by setting it to 1 */
+ udc_write(tmp, S3C2410_UDC_EP_INT_REG);
+ s3c2410_udc_handle_ep(&dev->ep[i]);
+ }
+ }
+
+ dprintk(DEBUG_VERBOSE, "irq: %d s3c2410_udc_done.\n", irq);
+
+ /* Restore old index */
+ udc_write(idx, S3C2410_UDC_INDEX_REG);
+
+ spin_unlock_irqrestore(&dev->lock, flags);
+
+ return IRQ_HANDLED;
+}
+/*------------------------- s3c2410_ep_ops ----------------------------------*/
+
+static inline struct s3c2410_ep *to_s3c2410_ep(struct usb_ep *ep)
+{
+ return container_of(ep, struct s3c2410_ep, ep);
+}
+
+static inline struct s3c2410_udc *to_s3c2410_udc(struct usb_gadget *gadget)
+{
+ return container_of(gadget, struct s3c2410_udc, gadget);
+}
+
+static inline struct s3c2410_request *to_s3c2410_req(struct usb_request *req)
+{
+ return container_of(req, struct s3c2410_request, req);
+}
+
+/*
+ * s3c2410_udc_ep_enable
+ */
+static int s3c2410_udc_ep_enable(struct usb_ep *_ep,
+ const struct usb_endpoint_descriptor *desc)
+{
+ struct s3c2410_udc *dev;
+ struct s3c2410_ep *ep;
+ u32 max, tmp;
+ unsigned long flags;
+ u32 csr1,csr2;
+ u32 int_en_reg;
+
+ ep = to_s3c2410_ep(_ep);
+
+ if (!_ep || !desc || ep->desc
+ || _ep->name == ep0name
+ || desc->bDescriptorType != USB_DT_ENDPOINT)
+ return -EINVAL;
+
+ dev = ep->dev;
+ if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
+ return -ESHUTDOWN;
+
+ max = le16_to_cpu(desc->wMaxPacketSize) & 0x1fff;
+
+ local_irq_save (flags);
+ _ep->maxpacket = max & 0x7ff;
+ ep->desc = desc;
+ ep->halted = 0;
+ ep->bEndpointAddress = desc->bEndpointAddress;
+
+ /* set max packet */
+ udc_write(ep->num, S3C2410_UDC_INDEX_REG);
+ udc_write(max >> 3, S3C2410_UDC_MAXP_REG);
+
+ /* set type, direction, address; reset fifo counters */
+ if (desc->bEndpointAddress & USB_DIR_IN) {
+ csr1 = S3C2410_UDC_ICSR1_FFLUSH|S3C2410_UDC_ICSR1_CLRDT;
+ csr2 = S3C2410_UDC_ICSR2_MODEIN|S3C2410_UDC_ICSR2_DMAIEN;
+
+ udc_write(ep->num, S3C2410_UDC_INDEX_REG);
+ udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
+ udc_write(ep->num, S3C2410_UDC_INDEX_REG);
+ udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
+ } else {
+ /* don't flush in fifo or it will cause endpoint interrupt */
+ csr1 = S3C2410_UDC_ICSR1_CLRDT;
+ csr2 = S3C2410_UDC_ICSR2_DMAIEN;
+
+ udc_write(ep->num, S3C2410_UDC_INDEX_REG);
+ udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
+ udc_write(ep->num, S3C2410_UDC_INDEX_REG);
+ udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
+
+ csr1 = S3C2410_UDC_OCSR1_FFLUSH | S3C2410_UDC_OCSR1_CLRDT;
+ csr2 = S3C2410_UDC_OCSR2_DMAIEN;
+
+ udc_write(ep->num, S3C2410_UDC_INDEX_REG);
+ udc_write(csr1, S3C2410_UDC_OUT_CSR1_REG);
+ udc_write(ep->num, S3C2410_UDC_INDEX_REG);
+ udc_write(csr2, S3C2410_UDC_OUT_CSR2_REG);
+ }
+
+ /* enable irqs */
+ int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
+ udc_write(int_en_reg | (1 << ep->num), S3C2410_UDC_EP_INT_EN_REG);
+
+ /* print some debug message */
+ tmp = desc->bEndpointAddress;
+ dprintk (DEBUG_NORMAL, "enable %s(%d) ep%x%s-blk max %02x\n",
+ _ep->name,ep->num, tmp,
+ desc->bEndpointAddress & USB_DIR_IN ? "in" : "out", max);
+
+ local_irq_restore (flags);
+ s3c2410_udc_set_halt(_ep, 0);
+
+ return 0;
+}
+
+/*
+ * s3c2410_udc_ep_disable
+ */
+static int s3c2410_udc_ep_disable(struct usb_ep *_ep)
+{
+ struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
+ unsigned long flags;
+ u32 int_en_reg;
+
+ if (!_ep || !ep->desc) {
+ dprintk(DEBUG_NORMAL, "%s not enabled\n",
+ _ep ? ep->ep.name : NULL);
+ return -EINVAL;
+ }
+
+ local_irq_save(flags);
+
+ dprintk(DEBUG_NORMAL, "ep_disable: %s\n", _ep->name);
+
+ ep->desc = NULL;
+ ep->halted = 1;
+
+ s3c2410_udc_nuke (ep->dev, ep, -ESHUTDOWN);
+
+ /* disable irqs */
+ int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
+ udc_write(int_en_reg & ~(1<<ep->num), S3C2410_UDC_EP_INT_EN_REG);
+
+ local_irq_restore(flags);
+
+ dprintk(DEBUG_NORMAL, "%s disabled\n", _ep->name);
+
+ return 0;
+}
+
+/*
+ * s3c2410_udc_alloc_request
+ */
+static struct usb_request *
+s3c2410_udc_alloc_request(struct usb_ep *_ep, gfp_t mem_flags)
+{
+ struct s3c2410_request *req;
+
+ dprintk(DEBUG_VERBOSE,"%s(%p,%d)\n", __func__, _ep, mem_flags);
+
+ if (!_ep)
+ return NULL;
+
+ req = kzalloc (sizeof(struct s3c2410_request), mem_flags);
+ if (!req)
+ return NULL;
+
+ INIT_LIST_HEAD (&req->queue);
+ return &req->req;
+}
+
+/*
+ * s3c2410_udc_free_request
+ */
+static void
+s3c2410_udc_free_request(struct usb_ep *_ep, struct usb_request *_req)
+{
+ struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
+ struct s3c2410_request *req = to_s3c2410_req(_req);
+
+ dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
+
+ if (!ep || !_req || (!ep->desc && _ep->name != ep0name))
+ return;
+
+ WARN_ON (!list_empty (&req->queue));
+ kfree(req);
+}
+
+/*
+ * s3c2410_udc_alloc_buffer
+ */
+static void *s3c2410_udc_alloc_buffer(struct usb_ep *_ep,
+ unsigned bytes, dma_addr_t *dma, gfp_t mem_flags)
+{
+ char *retval;
+
+ dprintk(DEBUG_VERBOSE, "%s()\n", __func__);
+
+ if (!the_controller->driver)
+ return NULL;
+
+ retval = kmalloc (bytes, mem_flags);
+ *dma = (dma_addr_t) retval;
+ return retval;
+}
+
+/*
+ * s3c2410_udc_free_buffer
+ */
+static void s3c2410_udc_free_buffer (struct usb_ep *_ep, void *buf,
+ dma_addr_t dma, unsigned bytes)
+{
+ dprintk(DEBUG_VERBOSE, "%s()\n", __func__);
+
+ if (bytes)
+ kfree (buf);
+}
+
+/*
+ * s3c2410_udc_queue
+ */
+static int s3c2410_udc_queue(struct usb_ep *_ep, struct usb_request *_req,
+ gfp_t gfp_flags)
+{
+ struct s3c2410_request *req = to_s3c2410_req(_req);
+ struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
+ struct s3c2410_udc *dev;
+ u32 ep_csr = 0;
+ int fifo_count = 0;
+ unsigned long flags;
+
+ if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
+ dprintk(DEBUG_NORMAL, "%s: invalid args\n", __func__);
+ return -EINVAL;
+ }
+
+ dev = ep->dev;
+ if (unlikely (!dev->driver
+ || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
+ return -ESHUTDOWN;
+ }
+
+ local_irq_save (flags);
+
+ if (unlikely(!_req || !_req->complete
+ || !_req->buf || !list_empty(&req->queue))) {
+ if (!_req)
+ dprintk(DEBUG_NORMAL, "%s: 1 X X X\n", __func__);
+ else {
+ dprintk(DEBUG_NORMAL, "%s: 0 %01d %01d %01d\n",
+ __func__, !_req->complete,!_req->buf,
+ !list_empty(&req->queue));
+ }
+
+ local_irq_restore(flags);
+ return -EINVAL;
+ }
+
+ _req->status = -EINPROGRESS;
+ _req->actual = 0;
+
+ dprintk(DEBUG_VERBOSE, "%s: ep%x len %d\n",
+ __func__, ep->bEndpointAddress, _req->length);
+
+ if (ep->bEndpointAddress) {
+ udc_write(ep->bEndpointAddress & 0x7F, S3C2410_UDC_INDEX_REG);
+
+ ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
+ ? S3C2410_UDC_IN_CSR1_REG
+ : S3C2410_UDC_OUT_CSR1_REG);
+ fifo_count = s3c2410_udc_fifo_count_out();
+ } else {
+ udc_write(0, S3C2410_UDC_INDEX_REG);
+ ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
+ fifo_count = s3c2410_udc_fifo_count_out();
+ }
+
+ /* kickstart this i/o queue? */
+ if (list_empty(&ep->queue) && !ep->halted) {
+ if (ep->bEndpointAddress == 0 /* ep0 */) {
+ switch (dev->ep0state) {
+ case EP0_IN_DATA_PHASE:
+ if (!(ep_csr&S3C2410_UDC_EP0_CSR_IPKRDY)
+ && s3c2410_udc_write_fifo(ep,
+ req)) {
+ dev->ep0state = EP0_IDLE;
+ req = NULL;
+ }
+ break;
+
+ case EP0_OUT_DATA_PHASE:
+ if ((!_req->length)
+ || ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
+ && s3c2410_udc_read_fifo(ep,
+ req))) {
+ dev->ep0state = EP0_IDLE;
+ req = NULL;
+ }
+ break;
+
+ default:
+ local_irq_restore(flags);
+ return -EL2HLT;
+ }
+ } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0
+ && (!(ep_csr&S3C2410_UDC_OCSR1_PKTRDY))
+ && s3c2410_udc_write_fifo(ep, req)) {
+ req = NULL;
+ } else if ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
+ && fifo_count
+ && s3c2410_udc_read_fifo(ep, req)) {
+ req = NULL;
+ }
+ }
+
+ /* pio or dma irq handler advances the queue. */
+ if (likely (req != 0))
+ list_add_tail(&req->queue, &ep->queue);
+
+ local_irq_restore(flags);
+
+ dprintk(DEBUG_VERBOSE, "%s ok\n", __func__);
+ return 0;
+}
+
+/*
+ * s3c2410_udc_dequeue
+ */
+static int s3c2410_udc_dequeue(struct usb_ep *_ep, struct usb_request *_req)
+{
+ struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
+ struct s3c2410_udc *udc;
+ int retval = -EINVAL;
+ unsigned long flags;
+ struct s3c2410_request *req = NULL;
+
+ dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
+
+ if (!the_controller->driver)
+ return -ESHUTDOWN;
+
+ if (!_ep || !_req)
+ return retval;
+
+ udc = to_s3c2410_udc(ep->gadget);
+
+ local_irq_save (flags);
+
+ list_for_each_entry (req, &ep->queue, queue) {
+ if (&req->req == _req) {
+ list_del_init (&req->queue);
+ _req->status = -ECONNRESET;
+ retval = 0;
+ break;
+ }
+ }
+
+ if (retval == 0) {
+ dprintk(DEBUG_VERBOSE,
+ "dequeued req %p from %s, len %d buf %p\n",
+ req, _ep->name, _req->length, _req->buf);
+
+ s3c2410_udc_done(ep, req, -ECONNRESET);
+ }
+
+ local_irq_restore (flags);
+ return retval;
+}
+
+/*
+ * s3c2410_udc_set_halt
+ */
+static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value)
+{
+ struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
+ u32 ep_csr = 0;
+ unsigned long flags;
+ u32 idx;
+
+ if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
+ dprintk(DEBUG_NORMAL, "%s: inval 2\n", __func__);
+ return -EINVAL;
+ }
+
+ local_irq_save (flags);
+
+ idx = ep->bEndpointAddress & 0x7F;
+
+ if (idx == 0) {
+ s3c2410_udc_set_ep0_ss(base_addr);
+ s3c2410_udc_set_ep0_de_out(base_addr);
+ } else {
+ udc_write(idx, S3C2410_UDC_INDEX_REG);
+ ep_csr = udc_read((ep->bEndpointAddress &USB_DIR_IN)
+ ? S3C2410_UDC_IN_CSR1_REG
+ : S3C2410_UDC_OUT_CSR1_REG);
+
+ if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
+ if (value)
+ udc_write(ep_csr | S3C2410_UDC_ICSR1_SENDSTL,
+ S3C2410_UDC_IN_CSR1_REG);
+ else {
+ ep_csr &= ~S3C2410_UDC_ICSR1_SENDSTL;
+ udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
+ ep_csr |= S3C2410_UDC_ICSR1_CLRDT;
+ udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
+ }
+ } else {
+ if (value)
+ udc_write(ep_csr | S3C2410_UDC_OCSR1_SENDSTL,
+ S3C2410_UDC_OUT_CSR1_REG);
+ else {
+ ep_csr &= ~S3C2410_UDC_OCSR1_SENDSTL;
+ udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
+ ep_csr |= S3C2410_UDC_OCSR1_CLRDT;
+ udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
+ }
+ }
+ }
+
+ ep->halted = value ? 1 : 0;
+ local_irq_restore (flags);
+
+ return 0;
+}
+
+static const struct usb_ep_ops s3c2410_ep_ops = {
+ .enable = s3c2410_udc_ep_enable,
+ .disable = s3c2410_udc_ep_disable,
+
+ .alloc_request = s3c2410_udc_alloc_request,
+ .free_request = s3c2410_udc_free_request,
+
+ .alloc_buffer = s3c2410_udc_alloc_buffer,
+ .free_buffer = s3c2410_udc_free_buffer,
+
+ .queue = s3c2410_udc_queue,
+ .dequeue = s3c2410_udc_dequeue,
+
+ .set_halt = s3c2410_udc_set_halt,
+};
+
+/*------------------------- usb_gadget_ops ----------------------------------*/
+
+/*
+ * s3c2410_udc_get_frame
+ */
+static int s3c2410_udc_get_frame(struct usb_gadget *_gadget)
+{
+ int tmp;
+
+ dprintk(DEBUG_VERBOSE, "%s()\n", __func__);
+
+ tmp = udc_read(S3C2410_UDC_FRAME_NUM2_REG) << 8;
+ tmp |= udc_read(S3C2410_UDC_FRAME_NUM1_REG);
+ return tmp;
+}
+
+/*
+ * s3c2410_udc_wakeup
+ */
+static int s3c2410_udc_wakeup(struct usb_gadget *_gadget)
+{
+ dprintk(DEBUG_NORMAL, "%s()\n", __func__);
+ return 0;
+}
+
+/*
+ * s3c2410_udc_set_selfpowered
+ */
+static int s3c2410_udc_set_selfpowered(struct usb_gadget *gadget, int value)
+{
+ struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
+
+ dprintk(DEBUG_NORMAL, "%s()\n", __func__);
+
+ if (value)
+ udc->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
+ else
+ udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
+
+ return 0;
+}
+
+static void s3c2410_udc_disable(struct s3c2410_udc *dev);
+static void s3c2410_udc_enable(struct s3c2410_udc *dev);
+
+static int s3c2410_udc_set_pullup(struct s3c2410_udc *udc, int is_on)
+{
+ dprintk(DEBUG_NORMAL, "%s()\n", __func__);
+
+ if (udc_info && udc_info->udc_command) {
+ if (is_on)
+ s3c2410_udc_enable(udc);
+ else {
+ if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
+ if (udc->driver && udc->driver->disconnect)
+ udc->driver->disconnect(&udc->gadget);
+
+ }
+ s3c2410_udc_disable(udc);
+ }
+ }
+ else
+ return -EOPNOTSUPP;
+
+ return 0;
+}
+
+static int s3c2410_udc_vbus_session(struct usb_gadget *gadget, int is_active)
+{
+ struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
+
+ dprintk(DEBUG_NORMAL, "%s()\n", __func__);
+
+ udc->vbus = (is_active != 0);
+ s3c2410_udc_set_pullup(udc, is_active);
+ return 0;
+}
+
+static int s3c2410_udc_pullup(struct usb_gadget *gadget, int is_on)
+{
+ struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
+
+ dprintk(DEBUG_NORMAL, "%s()\n", __func__);
+
+ s3c2410_udc_set_pullup(udc, is_on ? 0 : 1);
+ return 0;
+}
+
+static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev)
+{
+ struct s3c2410_udc *dev = _dev;
+ unsigned int value;
+
+ dprintk(DEBUG_NORMAL, "%s()\n", __func__);
+ value = s3c2410_gpio_getpin(udc_info->vbus_pin);
+
+ if (udc_info->vbus_pin_inverted)
+ value = !value;
+
+ if (value != dev->vbus)
+ s3c2410_udc_vbus_session(&dev->gadget, value);
+
+ return IRQ_HANDLED;
+}
+
+static int s3c2410_vbus_draw(struct usb_gadget *_gadget, unsigned ma)
+{
+ dprintk(DEBUG_NORMAL, "%s()\n", __func__);
+
+ if (udc_info && udc_info->vbus_draw) {
+ udc_info->vbus_draw(ma);
+ return 0;
+ }
+
+ return -ENOTSUPP;
+}
+
+static const struct usb_gadget_ops s3c2410_ops = {
+ .get_frame = s3c2410_udc_get_frame,
+ .wakeup = s3c2410_udc_wakeup,
+ .set_selfpowered = s3c2410_udc_set_selfpowered,
+ .pullup = s3c2410_udc_pullup,
+ .vbus_session = s3c2410_udc_vbus_session,
+ .vbus_draw = s3c2410_vbus_draw,
+};
+
+/*------------------------- gadget driver handling---------------------------*/
+/*
+ * s3c2410_udc_disable
+ */
+static void s3c2410_udc_disable(struct s3c2410_udc *dev)
+{
+ dprintk(DEBUG_NORMAL, "%s()\n", __func__);
+
+ /* Disable all interrupts */
+ udc_write(0x00, S3C2410_UDC_USB_INT_EN_REG);
+ udc_write(0x00, S3C2410_UDC_EP_INT_EN_REG);
+
+ /* Clear the interrupt registers */
+ udc_write(S3C2410_UDC_USBINT_RESET
+ | S3C2410_UDC_USBINT_RESUME
+ | S3C2410_UDC_USBINT_SUSPEND,
+ S3C2410_UDC_USB_INT_REG);
+
+ udc_write(0x1F, S3C2410_UDC_EP_INT_REG);
+
+ /* Good bye, cruel world */
+ if (udc_info && udc_info->udc_command)
+ udc_info->udc_command(S3C2410_UDC_P_DISABLE);
+
+ /* Set speed to unknown */
+ dev->gadget.speed = USB_SPEED_UNKNOWN;
+}
+
+/*
+ * s3c2410_udc_reinit
+ */
+static void s3c2410_udc_reinit(struct s3c2410_udc *dev)
+{
+ u32 i;
+
+ /* device/ep0 records init */
+ INIT_LIST_HEAD (&dev->gadget.ep_list);
+ INIT_LIST_HEAD (&dev->gadget.ep0->ep_list);
+ dev->ep0state = EP0_IDLE;
+
+ for (i = 0; i < S3C2410_ENDPOINTS; i++) {
+ struct s3c2410_ep *ep = &dev->ep[i];
+
+ if (i != 0)
+ list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
+
+ ep->dev = dev;
+ ep->desc = NULL;
+ ep->halted = 0;
+ INIT_LIST_HEAD (&ep->queue);
+ }
+}
+
+/*
+ * s3c2410_udc_enable
+ */
+static void s3c2410_udc_enable(struct s3c2410_udc *dev)
+{
+ int i;
+
+ dprintk(DEBUG_NORMAL, "s3c2410_udc_enable called\n");
+
+ /* dev->gadget.speed = USB_SPEED_UNKNOWN; */
+ dev->gadget.speed = USB_SPEED_FULL;
+
+ /* Set MAXP for all endpoints */
+ for (i = 0; i < S3C2410_ENDPOINTS; i++) {
+ udc_write(i, S3C2410_UDC_INDEX_REG);
+ udc_write((dev->ep[i].ep.maxpacket & 0x7ff) >> 3,
+ S3C2410_UDC_MAXP_REG);
+ }
+
+ /* Set default power state */
+ udc_write(DEFAULT_POWER_STATE, S3C2410_UDC_PWR_REG);
+
+ /* Enable reset and suspend interrupt interrupts */
+ udc_write(S3C2410_UDC_USBINT_RESET | S3C2410_UDC_USBINT_SUSPEND,
+ S3C2410_UDC_USB_INT_EN_REG);
+
+ /* Enable ep0 interrupt */
+ udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_EN_REG);
+
+ /* time to say "hello, world" */
+ if (udc_info && udc_info->udc_command)
+ udc_info->udc_command(S3C2410_UDC_P_ENABLE);
+}
+
+/*
+ * usb_gadget_register_driver
+ */
+int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+{
+ struct s3c2410_udc *udc = the_controller;
+ int retval;
+
+ dprintk(DEBUG_NORMAL, "usb_gadget_register_driver() '%s'\n",
+ driver->driver.name);
+
+ /* Sanity checks */
+ if (!udc)
+ return -ENODEV;
+
+ if (udc->driver)
+ return -EBUSY;
+
+ if (!driver->bind || !driver->setup
+ || driver->speed != USB_SPEED_FULL) {
+ printk(KERN_ERR "Invalid driver: bind %p setup %p speed %d\n",
+ driver->bind, driver->setup, driver->speed);
+ return -EINVAL;
+ }
+#if defined(MODULE)
+ if (!driver->unbind) {
+ printk(KERN_ERR "Invalid driver: no unbind method\n");
+ return -EINVAL;
+ }
+#endif
+
+ /* Hook the driver */
+ udc->driver = driver;
+ udc->gadget.dev.driver = &driver->driver;
+
+ /* Bind the driver */
+ if ((retval = device_add(&udc->gadget.dev)) != 0) {
+ printk(KERN_ERR "Error in device_add() : %d\n",retval);
+ goto register_error;
+ }
+
+ dprintk(DEBUG_NORMAL, "binding gadget driver '%s'\n",
+ driver->driver.name);
+
+ if ((retval = driver->bind (&udc->gadget)) != 0) {
+ device_del(&udc->gadget.dev);
+ goto register_error;
+ }
+
+ /* Enable udc */
+ s3c2410_udc_enable(udc);
+
+ return 0;
+
+register_error:
+ udc->driver = NULL;
+ udc->gadget.dev.driver = NULL;
+ return retval;
+}
+
+/*
+ * usb_gadget_unregister_driver
+ */
+int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
+{
+ struct s3c2410_udc *udc = the_controller;
+
+ if (!udc)
+ return -ENODEV;
+
+ if (!driver || driver != udc->driver || !driver->unbind)
+ return -EINVAL;
+
+ dprintk(DEBUG_NORMAL,"usb_gadget_register_driver() '%s'\n",
+ driver->driver.name);
+
+ if (driver->disconnect)
+ driver->disconnect(&udc->gadget);
+
+ device_del(&udc->gadget.dev);
+ udc->driver = NULL;
+
+ /* Disable udc */
+ s3c2410_udc_disable(udc);
+
+ return 0;
+}
+
+/*---------------------------------------------------------------------------*/
+static struct s3c2410_udc memory = {
+ .gadget = {
+ .ops = &s3c2410_ops,
+ .ep0 = &memory.ep[0].ep,
+ .name = gadget_name,
+ .dev = {
+ .bus_id = "gadget",
+ },
+ },
+
+ /* control endpoint */
+ .ep[0] = {
+ .num = 0,
+ .ep = {
+ .name = ep0name,
+ .ops = &s3c2410_ep_ops,
+ .maxpacket = EP0_FIFO_SIZE,
+ },
+ .dev = &memory,
+ },
+
+ /* first group of endpoints */
+ .ep[1] = {
+ .num = 1,
+ .ep = {
+ .name = "ep1-bulk",
+ .ops = &s3c2410_ep_ops,
+ .maxpacket = EP_FIFO_SIZE,
+ },
+ .dev = &memory,
+ .fifo_size = EP_FIFO_SIZE,
+ .bEndpointAddress = 1,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ },
+ .ep[2] = {
+ .num = 2,
+ .ep = {
+ .name = "ep2-bulk",
+ .ops = &s3c2410_ep_ops,
+ .maxpacket = EP_FIFO_SIZE,
+ },
+ .dev = &memory,
+ .fifo_size = EP_FIFO_SIZE,
+ .bEndpointAddress = 2,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ },
+ .ep[3] = {
+ .num = 3,
+ .ep = {
+ .name = "ep3-bulk",
+ .ops = &s3c2410_ep_ops,
+ .maxpacket = EP_FIFO_SIZE,
+ },
+ .dev = &memory,
+ .fifo_size = EP_FIFO_SIZE,
+ .bEndpointAddress = 3,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ },
+ .ep[4] = {
+ .num = 4,
+ .ep = {
+ .name = "ep4-bulk",
+ .ops = &s3c2410_ep_ops,
+ .maxpacket = EP_FIFO_SIZE,
+ },
+ .dev = &memory,
+ .fifo_size = EP_FIFO_SIZE,
+ .bEndpointAddress = 4,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ }
+
+};
+
+/*
+ * probe - binds to the platform device
+ */
+static int s3c2410_udc_probe(struct platform_device *pdev)
+{
+ struct s3c2410_udc *udc = &memory;
+ struct device *dev = &pdev->dev;
+ int retval;
+ unsigned int irq;
+
+ dev_dbg(dev, "%s()\n", __func__);
+
+ usb_bus_clock = clk_get(NULL, "usb-bus-gadget");
+ if (IS_ERR(usb_bus_clock)) {
+ dev_err(dev, "failed to get usb bus clock source\n");
+ return PTR_ERR(usb_bus_clock);
+ }
+
+ clk_enable(usb_bus_clock);
+
+ udc_clock = clk_get(NULL, "usb-device");
+ if (IS_ERR(udc_clock)) {
+ dev_err(dev, "failed to get udc clock source\n");
+ return PTR_ERR(udc_clock);
+ }
+
+ clk_enable(udc_clock);
+
+ mdelay(10);
+
+ dev_dbg(dev, "got and enabled clocks\n");
+
+ if (strncmp(pdev->name, "s3c2440", 7) == 0) {
+ dev_info(dev, "S3C2440: increasing FIFO to 128 bytes\n");
+ memory.ep[1].fifo_size = S3C2440_EP_FIFO_SIZE;
+ memory.ep[2].fifo_size = S3C2440_EP_FIFO_SIZE;
+ memory.ep[3].fifo_size = S3C2440_EP_FIFO_SIZE;
+ memory.ep[4].fifo_size = S3C2440_EP_FIFO_SIZE;
+ }
+
+ spin_lock_init (&udc->lock);
+ udc_info = pdev->dev.platform_data;
+
+ rsrc_start = S3C2410_PA_USBDEV;
+ rsrc_len = S3C24XX_SZ_USBDEV;
+
+ if (!request_mem_region(rsrc_start, rsrc_len, gadget_name))
+ return -EBUSY;
+
+ base_addr = ioremap(rsrc_start, rsrc_len);
+ if (!base_addr) {
+ retval = -ENOMEM;
+ goto err_mem;
+ }
+
+ device_initialize(&udc->gadget.dev);
+ udc->gadget.dev.parent = &pdev->dev;
+ udc->gadget.dev.dma_mask = pdev->dev.dma_mask;
+
+ the_controller = udc;
+ platform_set_drvdata(pdev, udc);
+
+ s3c2410_udc_disable(udc);
+ s3c2410_udc_reinit(udc);
+
+ /* irq setup after old hardware state is cleaned up */
+ retval = request_irq(IRQ_USBD, s3c2410_udc_irq,
+ IRQF_DISABLED, gadget_name, udc);
+
+ if (retval != 0) {
+ dev_err(dev, "cannot get irq %i, err %d\n", IRQ_USBD, retval);
+ retval = -EBUSY;
+ goto err_map;
+ }
+
+ dev_dbg(dev, "got irq %i\n", IRQ_USBD);
+
+ if (udc_info && udc_info->vbus_pin > 0) {
+ irq = s3c2410_gpio_getirq(udc_info->vbus_pin);
+ retval = request_irq(irq, s3c2410_udc_vbus_irq,
+ IRQF_DISABLED | IRQF_TRIGGER_RISING
+ | IRQF_TRIGGER_FALLING,
+ gadget_name, udc);
+
+ if (retval != 0) {
+ dev_err(dev, "can't get vbus irq %i, err %d\n",
+ irq, retval);
+ retval = -EBUSY;
+ goto err_int;
+ }
+
+ dev_dbg(dev, "got irq %i\n", irq);
+ } else {
+ udc->vbus = 1;
+ }
+
+ if (s3c2410_udc_debugfs_root) {
+ udc->regs_info = debugfs_create_file("registers", S_IRUGO,
+ s3c2410_udc_debugfs_root,
+ udc, &s3c2410_udc_debugfs_fops);
+ if (IS_ERR(udc->regs_info)) {
+ dev_warn(dev, "debugfs file creation failed %ld\n",
+ PTR_ERR(udc->regs_info));
+ udc->regs_info = NULL;
+ }
+ }
+
+ dev_dbg(dev, "probe ok\n");
+
+ return 0;
+
+err_int:
+ free_irq(IRQ_USBD, udc);
+err_map:
+ iounmap(base_addr);
+err_mem:
+ release_mem_region(rsrc_start, rsrc_len);
+
+ return retval;
+}
+
+/*
+ * s3c2410_udc_remove
+ */
+static int s3c2410_udc_remove(struct platform_device *pdev)
+{
+ struct s3c2410_udc *udc = platform_get_drvdata(pdev);
+ unsigned int irq;
+
+ dev_dbg(&pdev->dev, "%s()\n", __func__);
+ if (udc->driver)
+ return -EBUSY;
+
+ debugfs_remove(udc->regs_info);
+
+ if (udc_info && udc_info->vbus_pin > 0) {
+ irq = s3c2410_gpio_getirq(udc_info->vbus_pin);
+ free_irq(irq, udc);
+ }
+
+ free_irq(IRQ_USBD, udc);
+
+ iounmap(base_addr);
+ release_mem_region(rsrc_start, rsrc_len);
+
+ platform_set_drvdata(pdev, NULL);
+
+ if (!IS_ERR(udc_clock) && udc_clock != NULL) {
+ clk_disable(udc_clock);
+ clk_put(udc_clock);
+ udc_clock = NULL;
+ }
+
+ if (!IS_ERR(usb_bus_clock) && usb_bus_clock != NULL) {
+ clk_disable(usb_bus_clock);
+ clk_put(usb_bus_clock);
+ usb_bus_clock = NULL;
+ }
+
+ dev_dbg(&pdev->dev, "%s: remove ok\n", __func__);
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int s3c2410_udc_suspend(struct platform_device *pdev, pm_message_t message)
+{
+ if (udc_info && udc_info->udc_command)
+ udc_info->udc_command(S3C2410_UDC_P_DISABLE);
+
+ return 0;
+}
+
+static int s3c2410_udc_resume(struct platform_device *pdev)
+{
+ if (udc_info && udc_info->udc_command)
+ udc_info->udc_command(S3C2410_UDC_P_ENABLE);
+
+ return 0;
+}
+#else
+#define s3c2410_udc_suspend NULL
+#define s3c2410_udc_resume NULL
+#endif
+
+static struct platform_driver udc_driver_2410 = {
+ .driver = {
+ .name = "s3c2410-usbgadget",
+ .owner = THIS_MODULE,
+ },
+ .probe = s3c2410_udc_probe,
+ .remove = s3c2410_udc_remove,
+ .suspend = s3c2410_udc_suspend,
+ .resume = s3c2410_udc_resume,
+};
+
+static struct platform_driver udc_driver_2440 = {
+ .driver = {
+ .name = "s3c2440-usbgadget",
+ .owner = THIS_MODULE,
+ },
+ .probe = s3c2410_udc_probe,
+ .remove = s3c2410_udc_remove,
+ .suspend = s3c2410_udc_suspend,
+ .resume = s3c2410_udc_resume,
+};
+
+static int __init udc_init(void)
+{
+ int retval;
+
+ dprintk(DEBUG_NORMAL, "%s: version %s\n", gadget_name, DRIVER_VERSION);
+
+ s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name, NULL);
+ if (IS_ERR(s3c2410_udc_debugfs_root)) {
+ printk(KERN_ERR "%s: debugfs dir creation failed %ld\n",
+ gadget_name, PTR_ERR(s3c2410_udc_debugfs_root));
+ s3c2410_udc_debugfs_root = NULL;
+ }
+
+ retval = platform_driver_register(&udc_driver_2410);
+ if (retval)
+ goto err;
+
+ retval = platform_driver_register(&udc_driver_2440);
+ if (retval)
+ goto err;
+
+ return 0;
+
+err:
+ debugfs_remove(s3c2410_udc_debugfs_root);
+ return retval;
+}
+
+static void __exit udc_exit(void)
+{
+ platform_driver_unregister(&udc_driver_2410);
+ platform_driver_unregister(&udc_driver_2440);
+ debugfs_remove(s3c2410_udc_debugfs_root);
+}
+
+EXPORT_SYMBOL(usb_gadget_unregister_driver);
+EXPORT_SYMBOL(usb_gadget_register_driver);
+
+module_init(udc_init);
+module_exit(udc_exit);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_LICENSE("GPL");