drivers/usb/gadget/s3c2410_udc.c

   1 /*
   2  * linux/drivers/usb/gadget/s3c2410_udc.c
   3  *
   4  * Samsung S3C24xx series on-chip full speed USB device controllers
   5  *
   6  * Copyright (C) 2004-2007 Herbert Pötzl - Arnaud Patard
   7  *      Additional cleanups by Ben Dooks <ben-linux@fluff.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/kernel.h>
  17 #include <linux/delay.h>
  18 #include <linux/ioport.h>
  19 #include <linux/sched.h>
  20 #include <linux/slab.h>
  21 #include <linux/errno.h>
  22 #include <linux/init.h>
  23 #include <linux/timer.h>
  24 #include <linux/list.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/platform_device.h>
  27 #include <linux/clk.h>
  28 #include <linux/gpio.h>
  29 #include <linux/prefetch.h>
  30
  31 #include <linux/debugfs.h>
  32 #include <linux/seq_file.h>
  33
  34 #include <linux/usb.h>
  35 #include <linux/usb/gadget.h>
  36
  37 #include <asm/byteorder.h>
  38 #include <asm/io.h>
  39 #include <asm/irq.h>
  40 #include <asm/system.h>
  41 #include <asm/unaligned.h>
  42 #include <mach/irqs.h>
  43
  44 #include <mach/hardware.h>
  45
  46 #include <plat/regs-udc.h>
  47 #include <plat/udc.h>
  48
  49
  50 #include "s3c2410_udc.h"
  51
  52 #define DRIVER_DESC     "S3C2410 USB Device Controller Gadget"
  53 #define DRIVER_VERSION  "29 Apr 2007"
  54 #define DRIVER_AUTHOR   "Herbert Pötzl <herbert@13thfloor.at>, " \
  55                         "Arnaud Patard <arnaud.patard@rtp-net.org>"
  56
  57 static const char               gadget_name[] = "s3c2410_udc";
  58 static const char               driver_desc[] = DRIVER_DESC;
  59
  60 static struct s3c2410_udc       *the_controller;
  61 static struct clk               *udc_clock;
  62 static struct clk               *usb_bus_clock;
  63 static void __iomem             *base_addr;
  64 static u64                      rsrc_start;
  65 static u64                      rsrc_len;
  66 static struct dentry            *s3c2410_udc_debugfs_root;
  67
  68 static inline u32 udc_read(u32 reg)
  69 {
  70         return readb(base_addr + reg);
  71 }
  72
  73 static inline void udc_write(u32 value, u32 reg)
  74 {
  75         writeb(value, base_addr + reg);
  76 }
  77
  78 static inline void udc_writeb(void __iomem *base, u32 value, u32 reg)
  79 {
  80         writeb(value, base + reg);
  81 }
  82
  83 static struct s3c2410_udc_mach_info *udc_info;
  84
  85 /*************************** DEBUG FUNCTION ***************************/
  86 #define DEBUG_NORMAL    1
  87 #define DEBUG_VERBOSE   2
  88
  89 #ifdef CONFIG_USB_S3C2410_DEBUG
  90 #define USB_S3C2410_DEBUG_LEVEL 0
  91
  92 static uint32_t s3c2410_ticks = 0;
  93
  94 static int dprintk(int level, const char *fmt, ...)
  95 {
  96         static char printk_buf[1024];
  97         static long prevticks;
  98         static int invocation;
  99         va_list args;
 100         int len;
 101
 102         if (level > USB_S3C2410_DEBUG_LEVEL)
 103                 return 0;
 104
 105         if (s3c2410_ticks != prevticks) {
 106                 prevticks = s3c2410_ticks;
 107                 invocation = 0;
 108         }
 109
 110         len = scnprintf(printk_buf,
 111                         sizeof(printk_buf), "%1lu.%02d USB: ",
 112                         prevticks, invocation++);
 113
 114         va_start(args, fmt);
 115         len = vscnprintf(printk_buf+len,
 116                         sizeof(printk_buf)-len, fmt, args);
 117         va_end(args);
 118
 119         return printk(KERN_DEBUG "%s", printk_buf);
 120 }
 121 #else
 122 static int dprintk(int level, const char *fmt, ...)
 123 {
 124         return 0;
 125 }
 126 #endif
 127 static int s3c2410_udc_debugfs_seq_show(struct seq_file *m, void *p)
 128 {
 129         u32 addr_reg,pwr_reg,ep_int_reg,usb_int_reg;
 130         u32 ep_int_en_reg, usb_int_en_reg, ep0_csr;
 131         u32 ep1_i_csr1,ep1_i_csr2,ep1_o_csr1,ep1_o_csr2;
 132         u32 ep2_i_csr1,ep2_i_csr2,ep2_o_csr1,ep2_o_csr2;
 133
 134         addr_reg       = udc_read(S3C2410_UDC_FUNC_ADDR_REG);
 135         pwr_reg        = udc_read(S3C2410_UDC_PWR_REG);
 136         ep_int_reg     = udc_read(S3C2410_UDC_EP_INT_REG);
 137         usb_int_reg    = udc_read(S3C2410_UDC_USB_INT_REG);
 138         ep_int_en_reg  = udc_read(S3C2410_UDC_EP_INT_EN_REG);
 139         usb_int_en_reg = udc_read(S3C2410_UDC_USB_INT_EN_REG);
 140         udc_write(0, S3C2410_UDC_INDEX_REG);
 141         ep0_csr        = udc_read(S3C2410_UDC_IN_CSR1_REG);
 142         udc_write(1, S3C2410_UDC_INDEX_REG);
 143         ep1_i_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 144         ep1_i_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 145         ep1_o_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 146         ep1_o_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 147         udc_write(2, S3C2410_UDC_INDEX_REG);
 148         ep2_i_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 149         ep2_i_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 150         ep2_o_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 151         ep2_o_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 152
 153         seq_printf(m, "FUNC_ADDR_REG  : 0x%04X\n"
 154                  "PWR_REG        : 0x%04X\n"
 155                  "EP_INT_REG     : 0x%04X\n"
 156                  "USB_INT_REG    : 0x%04X\n"
 157                  "EP_INT_EN_REG  : 0x%04X\n"
 158                  "USB_INT_EN_REG : 0x%04X\n"
 159                  "EP0_CSR        : 0x%04X\n"
 160                  "EP1_I_CSR1     : 0x%04X\n"
 161                  "EP1_I_CSR2     : 0x%04X\n"
 162                  "EP1_O_CSR1     : 0x%04X\n"
 163                  "EP1_O_CSR2     : 0x%04X\n"
 164                  "EP2_I_CSR1     : 0x%04X\n"
 165                  "EP2_I_CSR2     : 0x%04X\n"
 166                  "EP2_O_CSR1     : 0x%04X\n"
 167                  "EP2_O_CSR2     : 0x%04X\n",
 168                         addr_reg,pwr_reg,ep_int_reg,usb_int_reg,
 169                         ep_int_en_reg, usb_int_en_reg, ep0_csr,
 170                         ep1_i_csr1,ep1_i_csr2,ep1_o_csr1,ep1_o_csr2,
 171                         ep2_i_csr1,ep2_i_csr2,ep2_o_csr1,ep2_o_csr2
 172                 );
 173
 174         return 0;
 175 }
 176
 177 static int s3c2410_udc_debugfs_fops_open(struct inode *inode,
 178                                          struct file *file)
 179 {
 180         return single_open(file, s3c2410_udc_debugfs_seq_show, NULL);
 181 }
 182
 183 static const struct file_operations s3c2410_udc_debugfs_fops = {
 184         .open           = s3c2410_udc_debugfs_fops_open,
 185         .read           = seq_read,
 186         .llseek         = seq_lseek,
 187         .release        = single_release,
 188         .owner          = THIS_MODULE,
 189 };
 190
 191 /* io macros */
 192
 193 static inline void s3c2410_udc_clear_ep0_opr(void __iomem *base)
 194 {
 195         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 196         udc_writeb(base, S3C2410_UDC_EP0_CSR_SOPKTRDY,
 197                         S3C2410_UDC_EP0_CSR_REG);
 198 }
 199
 200 static inline void s3c2410_udc_clear_ep0_sst(void __iomem *base)
 201 {
 202         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 203         writeb(0x00, base + S3C2410_UDC_EP0_CSR_REG);
 204 }
 205
 206 static inline void s3c2410_udc_clear_ep0_se(void __iomem *base)
 207 {
 208         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 209         udc_writeb(base, S3C2410_UDC_EP0_CSR_SSE, S3C2410_UDC_EP0_CSR_REG);
 210 }
 211
 212 static inline void s3c2410_udc_set_ep0_ipr(void __iomem *base)
 213 {
 214         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 215         udc_writeb(base, S3C2410_UDC_EP0_CSR_IPKRDY, S3C2410_UDC_EP0_CSR_REG);
 216 }
 217
 218 static inline void s3c2410_udc_set_ep0_de(void __iomem *base)
 219 {
 220         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 221         udc_writeb(base, S3C2410_UDC_EP0_CSR_DE, S3C2410_UDC_EP0_CSR_REG);
 222 }
 223
 224 inline void s3c2410_udc_set_ep0_ss(void __iomem *b)
 225 {
 226         udc_writeb(b, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 227         udc_writeb(b, S3C2410_UDC_EP0_CSR_SENDSTL, S3C2410_UDC_EP0_CSR_REG);
 228 }
 229
 230 static inline void s3c2410_udc_set_ep0_de_out(void __iomem *base)
 231 {
 232         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 233
 234         udc_writeb(base,(S3C2410_UDC_EP0_CSR_SOPKTRDY
 235                                 | S3C2410_UDC_EP0_CSR_DE),
 236                         S3C2410_UDC_EP0_CSR_REG);
 237 }
 238
 239 static inline void s3c2410_udc_set_ep0_sse_out(void __iomem *base)
 240 {
 241         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 242         udc_writeb(base, (S3C2410_UDC_EP0_CSR_SOPKTRDY
 243                                 | S3C2410_UDC_EP0_CSR_SSE),
 244                         S3C2410_UDC_EP0_CSR_REG);
 245 }
 246
 247 static inline void s3c2410_udc_set_ep0_de_in(void __iomem *base)
 248 {
 249         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 250         udc_writeb(base, (S3C2410_UDC_EP0_CSR_IPKRDY
 251                         | S3C2410_UDC_EP0_CSR_DE),
 252                 S3C2410_UDC_EP0_CSR_REG);
 253 }
 254
 255 /*------------------------- I/O ----------------------------------*/
 256
 257 /*
 258  *      s3c2410_udc_done
 259  */
 260 static void s3c2410_udc_done(struct s3c2410_ep *ep,
 261                 struct s3c2410_request *req, int status)
 262 {
 263         unsigned halted = ep->halted;
 264
 265         list_del_init(&req->queue);
 266
 267         if (likely (req->req.status == -EINPROGRESS))
 268                 req->req.status = status;
 269         else
 270                 status = req->req.status;
 271
 272         ep->halted = 1;
 273         req->req.complete(&ep->ep, &req->req);
 274         ep->halted = halted;
 275 }
 276
 277 static void s3c2410_udc_nuke(struct s3c2410_udc *udc,
 278                 struct s3c2410_ep *ep, int status)
 279 {
 280         /* Sanity check */
 281         if (&ep->queue == NULL)
 282                 return;
 283
 284         while (!list_empty (&ep->queue)) {
 285                 struct s3c2410_request *req;
 286                 req = list_entry (ep->queue.next, struct s3c2410_request,
 287                                 queue);
 288                 s3c2410_udc_done(ep, req, status);
 289         }
 290 }
 291
 292 static inline void s3c2410_udc_clear_ep_state(struct s3c2410_udc *dev)
 293 {
 294         unsigned i;
 295
 296         /* hardware SET_{CONFIGURATION,INTERFACE} automagic resets endpoint
 297          * fifos, and pending transactions mustn't be continued in any case.
 298          */
 299
 300         for (i = 1; i < S3C2410_ENDPOINTS; i++)
 301                 s3c2410_udc_nuke(dev, &dev->ep[i], -ECONNABORTED);
 302 }
 303
 304 static inline int s3c2410_udc_fifo_count_out(void)
 305 {
 306         int tmp;
 307
 308         tmp = udc_read(S3C2410_UDC_OUT_FIFO_CNT2_REG) << 8;
 309         tmp |= udc_read(S3C2410_UDC_OUT_FIFO_CNT1_REG);
 310         return tmp;
 311 }
 312
 313 /*
 314  *      s3c2410_udc_write_packet
 315  */
 316 static inline int s3c2410_udc_write_packet(int fifo,
 317                 struct s3c2410_request *req,
 318                 unsigned max)
 319 {
 320         unsigned len = min(req->req.length - req->req.actual, max);
 321         u8 *buf = req->req.buf + req->req.actual;
 322
 323         prefetch(buf);
 324
 325         dprintk(DEBUG_VERBOSE, "%s %d %d %d %d\n", __func__,
 326                 req->req.actual, req->req.length, len, req->req.actual + len);
 327
 328         req->req.actual += len;
 329
 330         udelay(5);
 331         writesb(base_addr + fifo, buf, len);
 332         return len;
 333 }
 334
 335 /*
 336  *      s3c2410_udc_write_fifo
 337  *
 338  * return:  0 = still running, 1 = completed, negative = errno
 339  */
 340 static int s3c2410_udc_write_fifo(struct s3c2410_ep *ep,
 341                 struct s3c2410_request *req)
 342 {
 343         unsigned        count;
 344         int             is_last;
 345         u32             idx;
 346         int             fifo_reg;
 347         u32             ep_csr;
 348
 349         idx = ep->bEndpointAddress & 0x7F;
 350         switch (idx) {
 351         default:
 352                 idx = 0;
 353         case 0:
 354                 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
 355                 break;
 356         case 1:
 357                 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
 358                 break;
 359         case 2:
 360                 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
 361                 break;
 362         case 3:
 363                 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
 364                 break;
 365         case 4:
 366                 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
 367                 break;
 368         }
 369
 370         count = s3c2410_udc_write_packet(fifo_reg, req, ep->ep.maxpacket);
 371
 372         /* last packet is often short (sometimes a zlp) */
 373         if (count != ep->ep.maxpacket)
 374                 is_last = 1;
 375         else if (req->req.length != req->req.actual || req->req.zero)
 376                 is_last = 0;
 377         else
 378                 is_last = 2;
 379
 380         /* Only ep0 debug messages are interesting */
 381         if (idx == 0)
 382                 dprintk(DEBUG_NORMAL,
 383                         "Written ep%d %d.%d of %d b [last %d,z %d]\n",
 384                         idx, count, req->req.actual, req->req.length,
 385                         is_last, req->req.zero);
 386
 387         if (is_last) {
 388                 /* The order is important. It prevents sending 2 packets
 389                  * at the same time */
 390
 391                 if (idx == 0) {
 392                         /* Reset signal => no need to say 'data sent' */
 393                         if (! (udc_read(S3C2410_UDC_USB_INT_REG)
 394                                         & S3C2410_UDC_USBINT_RESET))
 395                                 s3c2410_udc_set_ep0_de_in(base_addr);
 396                         ep->dev->ep0state=EP0_IDLE;
 397                 } else {
 398                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 399                         ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 400                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 401                         udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
 402                                         S3C2410_UDC_IN_CSR1_REG);
 403                 }
 404
 405                 s3c2410_udc_done(ep, req, 0);
 406                 is_last = 1;
 407         } else {
 408                 if (idx == 0) {
 409                         /* Reset signal => no need to say 'data sent' */
 410                         if (! (udc_read(S3C2410_UDC_USB_INT_REG)
 411                                         & S3C2410_UDC_USBINT_RESET))
 412                                 s3c2410_udc_set_ep0_ipr(base_addr);
 413                 } else {
 414                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 415                         ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 416                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 417                         udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
 418                                         S3C2410_UDC_IN_CSR1_REG);
 419                 }
 420         }
 421
 422         return is_last;
 423 }
 424
 425 static inline int s3c2410_udc_read_packet(int fifo, u8 *buf,
 426                 struct s3c2410_request *req, unsigned avail)
 427 {
 428         unsigned len;
 429
 430         len = min(req->req.length - req->req.actual, avail);
 431         req->req.actual += len;
 432
 433         readsb(fifo + base_addr, buf, len);
 434         return len;
 435 }
 436
 437 /*
 438  * return:  0 = still running, 1 = queue empty, negative = errno
 439  */
 440 static int s3c2410_udc_read_fifo(struct s3c2410_ep *ep,
 441                                  struct s3c2410_request *req)
 442 {
 443         u8              *buf;
 444         u32             ep_csr;
 445         unsigned        bufferspace;
 446         int             is_last=1;
 447         unsigned        avail;
 448         int             fifo_count = 0;
 449         u32             idx;
 450         int             fifo_reg;
 451
 452         idx = ep->bEndpointAddress & 0x7F;
 453
 454         switch (idx) {
 455         default:
 456                 idx = 0;
 457         case 0:
 458                 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
 459                 break;
 460         case 1:
 461                 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
 462                 break;
 463         case 2:
 464                 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
 465                 break;
 466         case 3:
 467                 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
 468                 break;
 469         case 4:
 470                 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
 471                 break;
 472         }
 473
 474         if (!req->req.length)
 475                 return 1;
 476
 477         buf = req->req.buf + req->req.actual;
 478         bufferspace = req->req.length - req->req.actual;
 479         if (!bufferspace) {
 480                 dprintk(DEBUG_NORMAL, "%s: buffer full!\n", __func__);
 481                 return -1;
 482         }
 483
 484         udc_write(idx, S3C2410_UDC_INDEX_REG);
 485
 486         fifo_count = s3c2410_udc_fifo_count_out();
 487         dprintk(DEBUG_NORMAL, "%s fifo count : %d\n", __func__, fifo_count);
 488
 489         if (fifo_count > ep->ep.maxpacket)
 490                 avail = ep->ep.maxpacket;
 491         else
 492                 avail = fifo_count;
 493
 494         fifo_count = s3c2410_udc_read_packet(fifo_reg, buf, req, avail);
 495
 496         /* checking this with ep0 is not accurate as we already
 497          * read a control request
 498          **/
 499         if (idx != 0 && fifo_count < ep->ep.maxpacket) {
 500                 is_last = 1;
 501                 /* overflowed this request?  flush extra data */
 502                 if (fifo_count != avail)
 503                         req->req.status = -EOVERFLOW;
 504         } else {
 505                 is_last = (req->req.length <= req->req.actual) ? 1 : 0;
 506         }
 507
 508         udc_write(idx, S3C2410_UDC_INDEX_REG);
 509         fifo_count = s3c2410_udc_fifo_count_out();
 510
 511         /* Only ep0 debug messages are interesting */
 512         if (idx == 0)
 513                 dprintk(DEBUG_VERBOSE, "%s fifo count : %d [last %d]\n",
 514                         __func__, fifo_count,is_last);
 515
 516         if (is_last) {
 517                 if (idx == 0) {
 518                         s3c2410_udc_set_ep0_de_out(base_addr);
 519                         ep->dev->ep0state = EP0_IDLE;
 520                 } else {
 521                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 522                         ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 523                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 524                         udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
 525                                         S3C2410_UDC_OUT_CSR1_REG);
 526                 }
 527
 528                 s3c2410_udc_done(ep, req, 0);
 529         } else {
 530                 if (idx == 0) {
 531                         s3c2410_udc_clear_ep0_opr(base_addr);
 532                 } else {
 533                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 534                         ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 535                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 536                         udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
 537                                         S3C2410_UDC_OUT_CSR1_REG);
 538                 }
 539         }
 540
 541         return is_last;
 542 }
 543
 544 static int s3c2410_udc_read_fifo_crq(struct usb_ctrlrequest *crq)
 545 {
 546         unsigned char *outbuf = (unsigned char*)crq;
 547         int bytes_read = 0;
 548
 549         udc_write(0, S3C2410_UDC_INDEX_REG);
 550
 551         bytes_read = s3c2410_udc_fifo_count_out();
 552
 553         dprintk(DEBUG_NORMAL, "%s: fifo_count=%d\n", __func__, bytes_read);
 554
 555         if (bytes_read > sizeof(struct usb_ctrlrequest))
 556                 bytes_read = sizeof(struct usb_ctrlrequest);
 557
 558         readsb(S3C2410_UDC_EP0_FIFO_REG + base_addr, outbuf, bytes_read);
 559
 560         dprintk(DEBUG_VERBOSE, "%s: len=%d %02x:%02x {%x,%x,%x}\n", __func__,
 561                 bytes_read, crq->bRequest, crq->bRequestType,
 562                 crq->wValue, crq->wIndex, crq->wLength);
 563
 564         return bytes_read;
 565 }
 566
 567 static int s3c2410_udc_get_status(struct s3c2410_udc *dev,
 568                 struct usb_ctrlrequest *crq)
 569 {
 570         u16 status = 0;
 571         u8 ep_num = crq->wIndex & 0x7F;
 572         u8 is_in = crq->wIndex & USB_DIR_IN;
 573
 574         switch (crq->bRequestType & USB_RECIP_MASK) {
 575         case USB_RECIP_INTERFACE:
 576                 break;
 577
 578         case USB_RECIP_DEVICE:
 579                 status = dev->devstatus;
 580                 break;
 581
 582         case USB_RECIP_ENDPOINT:
 583                 if (ep_num > 4 || crq->wLength > 2)
 584                         return 1;
 585
 586                 if (ep_num == 0) {
 587                         udc_write(0, S3C2410_UDC_INDEX_REG);
 588                         status = udc_read(S3C2410_UDC_IN_CSR1_REG);
 589                         status = status & S3C2410_UDC_EP0_CSR_SENDSTL;
 590                 } else {
 591                         udc_write(ep_num, S3C2410_UDC_INDEX_REG);
 592                         if (is_in) {
 593                                 status = udc_read(S3C2410_UDC_IN_CSR1_REG);
 594                                 status = status & S3C2410_UDC_ICSR1_SENDSTL;
 595                         } else {
 596                                 status = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 597                                 status = status & S3C2410_UDC_OCSR1_SENDSTL;
 598                         }
 599                 }
 600
 601                 status = status ? 1 : 0;
 602                 break;
 603
 604         default:
 605                 return 1;
 606         }
 607
 608         /* Seems to be needed to get it working. ouch :( */
 609         udelay(5);
 610         udc_write(status & 0xFF, S3C2410_UDC_EP0_FIFO_REG);
 611         udc_write(status >> 8, S3C2410_UDC_EP0_FIFO_REG);
 612         s3c2410_udc_set_ep0_de_in(base_addr);
 613
 614         return 0;
 615 }
 616 /*------------------------- usb state machine -------------------------------*/
 617 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value);
 618
 619 static void s3c2410_udc_handle_ep0_idle(struct s3c2410_udc *dev,
 620                                         struct s3c2410_ep *ep,
 621                                         struct usb_ctrlrequest *crq,
 622                                         u32 ep0csr)
 623 {
 624         int len, ret, tmp;
 625
 626         /* start control request? */
 627         if (!(ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY))
 628                 return;
 629
 630         s3c2410_udc_nuke(dev, ep, -EPROTO);
 631
 632         len = s3c2410_udc_read_fifo_crq(crq);
 633         if (len != sizeof(*crq)) {
 634                 dprintk(DEBUG_NORMAL, "setup begin: fifo READ ERROR"
 635                         " wanted %d bytes got %d. Stalling out...\n",
 636                         sizeof(*crq), len);
 637                 s3c2410_udc_set_ep0_ss(base_addr);
 638                 return;
 639         }
 640
 641         dprintk(DEBUG_NORMAL, "bRequest = %d bRequestType %d wLength = %d\n",
 642                 crq->bRequest, crq->bRequestType, crq->wLength);
 643
 644         /* cope with automagic for some standard requests. */
 645         dev->req_std = (crq->bRequestType & USB_TYPE_MASK)
 646                 == USB_TYPE_STANDARD;
 647         dev->req_config = 0;
 648         dev->req_pending = 1;
 649
 650         switch (crq->bRequest) {
 651         case USB_REQ_SET_CONFIGURATION:
 652                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_CONFIGURATION ... \n");
 653
 654                 if (crq->bRequestType == USB_RECIP_DEVICE) {
 655                         dev->req_config = 1;
 656                         s3c2410_udc_set_ep0_de_out(base_addr);
 657                 }
 658                 break;
 659
 660         case USB_REQ_SET_INTERFACE:
 661                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_INTERFACE ... \n");
 662
 663                 if (crq->bRequestType == USB_RECIP_INTERFACE) {
 664                         dev->req_config = 1;
 665                         s3c2410_udc_set_ep0_de_out(base_addr);
 666                 }
 667                 break;
 668
 669         case USB_REQ_SET_ADDRESS:
 670                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_ADDRESS ... \n");
 671
 672                 if (crq->bRequestType == USB_RECIP_DEVICE) {
 673                         tmp = crq->wValue & 0x7F;
 674                         dev->address = tmp;
 675                         udc_write((tmp | S3C2410_UDC_FUNCADDR_UPDATE),
 676                                         S3C2410_UDC_FUNC_ADDR_REG);
 677                         s3c2410_udc_set_ep0_de_out(base_addr);
 678                         return;
 679                 }
 680                 break;
 681
 682         case USB_REQ_GET_STATUS:
 683                 dprintk(DEBUG_NORMAL, "USB_REQ_GET_STATUS ... \n");
 684                 s3c2410_udc_clear_ep0_opr(base_addr);
 685
 686                 if (dev->req_std) {
 687                         if (!s3c2410_udc_get_status(dev, crq)) {
 688                                 return;
 689                         }
 690                 }
 691                 break;
 692
 693         case USB_REQ_CLEAR_FEATURE:
 694                 s3c2410_udc_clear_ep0_opr(base_addr);
 695
 696                 if (crq->bRequestType != USB_RECIP_ENDPOINT)
 697                         break;
 698
 699                 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
 700                         break;
 701
 702                 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 0);
 703                 s3c2410_udc_set_ep0_de_out(base_addr);
 704                 return;
 705
 706         case USB_REQ_SET_FEATURE:
 707                 s3c2410_udc_clear_ep0_opr(base_addr);
 708
 709                 if (crq->bRequestType != USB_RECIP_ENDPOINT)
 710                         break;
 711
 712                 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
 713                         break;
 714
 715                 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 1);
 716                 s3c2410_udc_set_ep0_de_out(base_addr);
 717                 return;
 718
 719         default:
 720                 s3c2410_udc_clear_ep0_opr(base_addr);
 721                 break;
 722         }
 723
 724         if (crq->bRequestType & USB_DIR_IN)
 725                 dev->ep0state = EP0_IN_DATA_PHASE;
 726         else
 727                 dev->ep0state = EP0_OUT_DATA_PHASE;
 728
 729         if (!dev->driver)
 730                 return;
 731
 732         /* deliver the request to the gadget driver */
 733         ret = dev->driver->setup(&dev->gadget, crq);
 734         if (ret < 0) {
 735                 if (dev->req_config) {
 736                         dprintk(DEBUG_NORMAL, "config change %02x fail %d?\n",
 737                                 crq->bRequest, ret);
 738                         return;
 739                 }
 740
 741                 if (ret == -EOPNOTSUPP)
 742                         dprintk(DEBUG_NORMAL, "Operation not supported\n");
 743                 else
 744                         dprintk(DEBUG_NORMAL,
 745                                 "dev->driver->setup failed. (%d)\n", ret);
 746
 747                 udelay(5);
 748                 s3c2410_udc_set_ep0_ss(base_addr);
 749                 s3c2410_udc_set_ep0_de_out(base_addr);
 750                 dev->ep0state = EP0_IDLE;
 751                 /* deferred i/o == no response yet */
 752         } else if (dev->req_pending) {
 753                 dprintk(DEBUG_VERBOSE, "dev->req_pending... what now?\n");
 754                 dev->req_pending=0;
 755         }
 756
 757         dprintk(DEBUG_VERBOSE, "ep0state %s\n", ep0states[dev->ep0state]);
 758 }
 759
 760 static void s3c2410_udc_handle_ep0(struct s3c2410_udc *dev)
 761 {
 762         u32                     ep0csr;
 763         struct s3c2410_ep       *ep = &dev->ep[0];
 764         struct s3c2410_request  *req;
 765         struct usb_ctrlrequest  crq;
 766
 767         if (list_empty(&ep->queue))
 768                 req = NULL;
 769         else
 770                 req = list_entry(ep->queue.next, struct s3c2410_request, queue);
 771
 772         /* We make the assumption that S3C2410_UDC_IN_CSR1_REG equal to
 773          * S3C2410_UDC_EP0_CSR_REG when index is zero */
 774
 775         udc_write(0, S3C2410_UDC_INDEX_REG);
 776         ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 777
 778         dprintk(DEBUG_NORMAL, "ep0csr %x ep0state %s\n",
 779                 ep0csr, ep0states[dev->ep0state]);
 780
 781         /* clear stall status */
 782         if (ep0csr & S3C2410_UDC_EP0_CSR_SENTSTL) {
 783                 s3c2410_udc_nuke(dev, ep, -EPIPE);
 784                 dprintk(DEBUG_NORMAL, "... clear SENT_STALL ...\n");
 785                 s3c2410_udc_clear_ep0_sst(base_addr);
 786                 dev->ep0state = EP0_IDLE;
 787                 return;
 788         }
 789
 790         /* clear setup end */
 791         if (ep0csr & S3C2410_UDC_EP0_CSR_SE) {
 792                 dprintk(DEBUG_NORMAL, "... serviced SETUP_END ...\n");
 793                 s3c2410_udc_nuke(dev, ep, 0);
 794                 s3c2410_udc_clear_ep0_se(base_addr);
 795                 dev->ep0state = EP0_IDLE;
 796         }
 797
 798         switch (dev->ep0state) {
 799         case EP0_IDLE:
 800                 s3c2410_udc_handle_ep0_idle(dev, ep, &crq, ep0csr);
 801                 break;
 802
 803         case EP0_IN_DATA_PHASE:                 /* GET_DESCRIPTOR etc */
 804                 dprintk(DEBUG_NORMAL, "EP0_IN_DATA_PHASE ... what now?\n");
 805                 if (!(ep0csr & S3C2410_UDC_EP0_CSR_IPKRDY) && req) {
 806                         s3c2410_udc_write_fifo(ep, req);
 807                 }
 808                 break;
 809
 810         case EP0_OUT_DATA_PHASE:                /* SET_DESCRIPTOR etc */
 811                 dprintk(DEBUG_NORMAL, "EP0_OUT_DATA_PHASE ... what now?\n");
 812                 if ((ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY) && req ) {
 813                         s3c2410_udc_read_fifo(ep,req);
 814                 }
 815                 break;
 816
 817         case EP0_END_XFER:
 818                 dprintk(DEBUG_NORMAL, "EP0_END_XFER ... what now?\n");
 819                 dev->ep0state = EP0_IDLE;
 820                 break;
 821
 822         case EP0_STALL:
 823                 dprintk(DEBUG_NORMAL, "EP0_STALL ... what now?\n");
 824                 dev->ep0state = EP0_IDLE;
 825                 break;
 826         }
 827 }
 828
 829 /*
 830  *      handle_ep - Manage I/O endpoints
 831  */
 832
 833 static void s3c2410_udc_handle_ep(struct s3c2410_ep *ep)
 834 {
 835         struct s3c2410_request  *req;
 836         int                     is_in = ep->bEndpointAddress & USB_DIR_IN;
 837         u32                     ep_csr1;
 838         u32                     idx;
 839
 840         if (likely (!list_empty(&ep->queue)))
 841                 req = list_entry(ep->queue.next,
 842                                 struct s3c2410_request, queue);
 843         else
 844                 req = NULL;
 845
 846         idx = ep->bEndpointAddress & 0x7F;
 847
 848         if (is_in) {
 849                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 850                 ep_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
 851                 dprintk(DEBUG_VERBOSE, "ep%01d write csr:%02x %d\n",
 852                         idx, ep_csr1, req ? 1 : 0);
 853
 854                 if (ep_csr1 & S3C2410_UDC_ICSR1_SENTSTL) {
 855                         dprintk(DEBUG_VERBOSE, "st\n");
 856                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 857                         udc_write(ep_csr1 & ~S3C2410_UDC_ICSR1_SENTSTL,
 858                                         S3C2410_UDC_IN_CSR1_REG);
 859                         return;
 860                 }
 861
 862                 if (!(ep_csr1 & S3C2410_UDC_ICSR1_PKTRDY) && req) {
 863                         s3c2410_udc_write_fifo(ep,req);
 864                 }
 865         } else {
 866                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 867                 ep_csr1 = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 868                 dprintk(DEBUG_VERBOSE, "ep%01d rd csr:%02x\n", idx, ep_csr1);
 869
 870                 if (ep_csr1 & S3C2410_UDC_OCSR1_SENTSTL) {
 871                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 872                         udc_write(ep_csr1 & ~S3C2410_UDC_OCSR1_SENTSTL,
 873                                         S3C2410_UDC_OUT_CSR1_REG);
 874                         return;
 875                 }
 876
 877                 if ((ep_csr1 & S3C2410_UDC_OCSR1_PKTRDY) && req) {
 878                         s3c2410_udc_read_fifo(ep,req);
 879                 }
 880         }
 881 }
 882
 883 #include <mach/regs-irq.h>
 884
 885 /*
 886  *      s3c2410_udc_irq - interrupt handler
 887  */
 888 static irqreturn_t s3c2410_udc_irq(int dummy, void *_dev)
 889 {
 890         struct s3c2410_udc *dev = _dev;
 891         int usb_status;
 892         int usbd_status;
 893         int pwr_reg;
 894         int ep0csr;
 895         int i;
 896         u32 idx, idx2;
 897         unsigned long flags;
 898
 899         spin_lock_irqsave(&dev->lock, flags);
 900
 901         /* Driver connected ? */
 902         if (!dev->driver) {
 903                 /* Clear interrupts */
 904                 udc_write(udc_read(S3C2410_UDC_USB_INT_REG),
 905                                 S3C2410_UDC_USB_INT_REG);
 906                 udc_write(udc_read(S3C2410_UDC_EP_INT_REG),
 907                                 S3C2410_UDC_EP_INT_REG);
 908         }
 909
 910         /* Save index */
 911         idx = udc_read(S3C2410_UDC_INDEX_REG);
 912
 913         /* Read status registers */
 914         usb_status = udc_read(S3C2410_UDC_USB_INT_REG);
 915         usbd_status = udc_read(S3C2410_UDC_EP_INT_REG);
 916         pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
 917
 918         udc_writeb(base_addr, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 919         ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 920
 921         dprintk(DEBUG_NORMAL, "usbs=%02x, usbds=%02x, pwr=%02x ep0csr=%02x\n",
 922                 usb_status, usbd_status, pwr_reg, ep0csr);
 923
 924         /*
 925          * Now, handle interrupts. There's two types :
 926          * - Reset, Resume, Suspend coming -> usb_int_reg
 927          * - EP -> ep_int_reg
 928          */
 929
 930         /* RESET */
 931         if (usb_status & S3C2410_UDC_USBINT_RESET) {
 932                 /* two kind of reset :
 933                  * - reset start -> pwr reg = 8
 934                  * - reset end   -> pwr reg = 0
 935                  **/
 936                 dprintk(DEBUG_NORMAL, "USB reset csr %x pwr %x\n",
 937                         ep0csr, pwr_reg);
 938
 939                 dev->gadget.speed = USB_SPEED_UNKNOWN;
 940                 udc_write(0x00, S3C2410_UDC_INDEX_REG);
 941                 udc_write((dev->ep[0].ep.maxpacket & 0x7ff) >> 3,
 942                                 S3C2410_UDC_MAXP_REG);
 943                 dev->address = 0;
 944
 945                 dev->ep0state = EP0_IDLE;
 946                 dev->gadget.speed = USB_SPEED_FULL;
 947
 948                 /* clear interrupt */
 949                 udc_write(S3C2410_UDC_USBINT_RESET,
 950                                 S3C2410_UDC_USB_INT_REG);
 951
 952                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 953                 spin_unlock_irqrestore(&dev->lock, flags);
 954                 return IRQ_HANDLED;
 955         }
 956
 957         /* RESUME */
 958         if (usb_status & S3C2410_UDC_USBINT_RESUME) {
 959                 dprintk(DEBUG_NORMAL, "USB resume\n");
 960
 961                 /* clear interrupt */
 962                 udc_write(S3C2410_UDC_USBINT_RESUME,
 963                                 S3C2410_UDC_USB_INT_REG);
 964
 965                 if (dev->gadget.speed != USB_SPEED_UNKNOWN
 966                                 && dev->driver
 967                                 && dev->driver->resume)
 968                         dev->driver->resume(&dev->gadget);
 969         }
 970
 971         /* SUSPEND */
 972         if (usb_status & S3C2410_UDC_USBINT_SUSPEND) {
 973                 dprintk(DEBUG_NORMAL, "USB suspend\n");
 974
 975                 /* clear interrupt */
 976                 udc_write(S3C2410_UDC_USBINT_SUSPEND,
 977                                 S3C2410_UDC_USB_INT_REG);
 978
 979                 if (dev->gadget.speed != USB_SPEED_UNKNOWN
 980                                 && dev->driver
 981                                 && dev->driver->suspend)
 982                         dev->driver->suspend(&dev->gadget);
 983
 984                 dev->ep0state = EP0_IDLE;
 985         }
 986
 987         /* EP */
 988         /* control traffic */
 989         /* check on ep0csr != 0 is not a good idea as clearing in_pkt_ready
 990          * generate an interrupt
 991          */
 992         if (usbd_status & S3C2410_UDC_INT_EP0) {
 993                 dprintk(DEBUG_VERBOSE, "USB ep0 irq\n");
 994                 /* Clear the interrupt bit by setting it to 1 */
 995                 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_REG);
 996                 s3c2410_udc_handle_ep0(dev);
 997         }
 998
 999         /* endpoint data transfers */
1000         for (i = 1; i < S3C2410_ENDPOINTS; i++) {
1001                 u32 tmp = 1 << i;
1002                 if (usbd_status & tmp) {
1003                         dprintk(DEBUG_VERBOSE, "USB ep%d irq\n", i);
1004
1005                         /* Clear the interrupt bit by setting it to 1 */
1006                         udc_write(tmp, S3C2410_UDC_EP_INT_REG);
1007                         s3c2410_udc_handle_ep(&dev->ep[i]);
1008                 }
1009         }
1010
1011         /* what else causes this interrupt? a receive! who is it? */
1012         if (!usb_status && !usbd_status && !pwr_reg && !ep0csr) {
1013                 for (i = 1; i < S3C2410_ENDPOINTS; i++) {
1014                         idx2 = udc_read(S3C2410_UDC_INDEX_REG);
1015                         udc_write(i, S3C2410_UDC_INDEX_REG);
1016
1017                         if (udc_read(S3C2410_UDC_OUT_CSR1_REG) & 0x1)
1018                                 s3c2410_udc_handle_ep(&dev->ep[i]);
1019
1020                         /* restore index */
1021                         udc_write(idx2, S3C2410_UDC_INDEX_REG);
1022                 }
1023         }
1024
1025         dprintk(DEBUG_VERBOSE, "irq: %d s3c2410_udc_done.\n", IRQ_USBD);
1026
1027         /* Restore old index */
1028         udc_write(idx, S3C2410_UDC_INDEX_REG);
1029
1030         spin_unlock_irqrestore(&dev->lock, flags);
1031
1032         return IRQ_HANDLED;
1033 }
1034 /*------------------------- s3c2410_ep_ops ----------------------------------*/
1035
1036 static inline struct s3c2410_ep *to_s3c2410_ep(struct usb_ep *ep)
1037 {
1038         return container_of(ep, struct s3c2410_ep, ep);
1039 }
1040
1041 static inline struct s3c2410_udc *to_s3c2410_udc(struct usb_gadget *gadget)
1042 {
1043         return container_of(gadget, struct s3c2410_udc, gadget);
1044 }
1045
1046 static inline struct s3c2410_request *to_s3c2410_req(struct usb_request *req)
1047 {
1048         return container_of(req, struct s3c2410_request, req);
1049 }
1050
1051 /*
1052  *      s3c2410_udc_ep_enable
1053  */
1054 static int s3c2410_udc_ep_enable(struct usb_ep *_ep,
1055                                  const struct usb_endpoint_descriptor *desc)
1056 {
1057         struct s3c2410_udc      *dev;
1058         struct s3c2410_ep       *ep;
1059         u32                     max, tmp;
1060         unsigned long           flags;
1061         u32                     csr1,csr2;
1062         u32                     int_en_reg;
1063
1064         ep = to_s3c2410_ep(_ep);
1065
1066         if (!_ep || !desc || ep->desc
1067                         || _ep->name == ep0name
1068                         || desc->bDescriptorType != USB_DT_ENDPOINT)
1069                 return -EINVAL;
1070
1071         dev = ep->dev;
1072         if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
1073                 return -ESHUTDOWN;
1074
1075         max = usb_endpoint_maxp(desc) & 0x1fff;
1076
1077         local_irq_save (flags);
1078         _ep->maxpacket = max & 0x7ff;
1079         ep->desc = desc;
1080         ep->halted = 0;
1081         ep->bEndpointAddress = desc->bEndpointAddress;
1082
1083         /* set max packet */
1084         udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1085         udc_write(max >> 3, S3C2410_UDC_MAXP_REG);
1086
1087         /* set type, direction, address; reset fifo counters */
1088         if (desc->bEndpointAddress & USB_DIR_IN) {
1089                 csr1 = S3C2410_UDC_ICSR1_FFLUSH|S3C2410_UDC_ICSR1_CLRDT;
1090                 csr2 = S3C2410_UDC_ICSR2_MODEIN|S3C2410_UDC_ICSR2_DMAIEN;
1091
1092                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1093                 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1094                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1095                 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1096         } else {
1097                 /* don't flush in fifo or it will cause endpoint interrupt */
1098                 csr1 = S3C2410_UDC_ICSR1_CLRDT;
1099                 csr2 = S3C2410_UDC_ICSR2_DMAIEN;
1100
1101                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1102                 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1103                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1104                 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1105
1106                 csr1 = S3C2410_UDC_OCSR1_FFLUSH | S3C2410_UDC_OCSR1_CLRDT;
1107                 csr2 = S3C2410_UDC_OCSR2_DMAIEN;
1108
1109                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1110                 udc_write(csr1, S3C2410_UDC_OUT_CSR1_REG);
1111                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1112                 udc_write(csr2, S3C2410_UDC_OUT_CSR2_REG);
1113         }
1114
1115         /* enable irqs */
1116         int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1117         udc_write(int_en_reg | (1 << ep->num), S3C2410_UDC_EP_INT_EN_REG);
1118
1119         /* print some debug message */
1120         tmp = desc->bEndpointAddress;
1121         dprintk (DEBUG_NORMAL, "enable %s(%d) ep%x%s-blk max %02x\n",
1122                  _ep->name,ep->num, tmp,
1123                  desc->bEndpointAddress & USB_DIR_IN ? "in" : "out", max);
1124
1125         local_irq_restore (flags);
1126         s3c2410_udc_set_halt(_ep, 0);
1127
1128         return 0;
1129 }
1130
1131 /*
1132  * s3c2410_udc_ep_disable
1133  */
1134 static int s3c2410_udc_ep_disable(struct usb_ep *_ep)
1135 {
1136         struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1137         unsigned long flags;
1138         u32 int_en_reg;
1139
1140         if (!_ep || !ep->desc) {
1141                 dprintk(DEBUG_NORMAL, "%s not enabled\n",
1142                         _ep ? ep->ep.name : NULL);
1143                 return -EINVAL;
1144         }
1145
1146         local_irq_save(flags);
1147
1148         dprintk(DEBUG_NORMAL, "ep_disable: %s\n", _ep->name);
1149
1150         ep->desc = NULL;
1151         ep->halted = 1;
1152
1153         s3c2410_udc_nuke (ep->dev, ep, -ESHUTDOWN);
1154
1155         /* disable irqs */
1156         int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1157         udc_write(int_en_reg & ~(1<<ep->num), S3C2410_UDC_EP_INT_EN_REG);
1158
1159         local_irq_restore(flags);
1160
1161         dprintk(DEBUG_NORMAL, "%s disabled\n", _ep->name);
1162
1163         return 0;
1164 }
1165
1166 /*
1167  * s3c2410_udc_alloc_request
1168  */
1169 static struct usb_request *
1170 s3c2410_udc_alloc_request(struct usb_ep *_ep, gfp_t mem_flags)
1171 {
1172         struct s3c2410_request *req;
1173
1174         dprintk(DEBUG_VERBOSE,"%s(%p,%d)\n", __func__, _ep, mem_flags);
1175
1176         if (!_ep)
1177                 return NULL;
1178
1179         req = kzalloc (sizeof(struct s3c2410_request), mem_flags);
1180         if (!req)
1181                 return NULL;
1182
1183         INIT_LIST_HEAD (&req->queue);
1184         return &req->req;
1185 }
1186
1187 /*
1188  * s3c2410_udc_free_request
1189  */
1190 static void
1191 s3c2410_udc_free_request(struct usb_ep *_ep, struct usb_request *_req)
1192 {
1193         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1194         struct s3c2410_request  *req = to_s3c2410_req(_req);
1195
1196         dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1197
1198         if (!ep || !_req || (!ep->desc && _ep->name != ep0name))
1199                 return;
1200
1201         WARN_ON (!list_empty (&req->queue));
1202         kfree(req);
1203 }
1204
1205 /*
1206  *      s3c2410_udc_queue
1207  */
1208 static int s3c2410_udc_queue(struct usb_ep *_ep, struct usb_request *_req,
1209                 gfp_t gfp_flags)
1210 {
1211         struct s3c2410_request  *req = to_s3c2410_req(_req);
1212         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1213         struct s3c2410_udc      *dev;
1214         u32                     ep_csr = 0;
1215         int                     fifo_count = 0;
1216         unsigned long           flags;
1217
1218         if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1219                 dprintk(DEBUG_NORMAL, "%s: invalid args\n", __func__);
1220                 return -EINVAL;
1221         }
1222
1223         dev = ep->dev;
1224         if (unlikely (!dev->driver
1225                         || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
1226                 return -ESHUTDOWN;
1227         }
1228
1229         local_irq_save (flags);
1230
1231         if (unlikely(!_req || !_req->complete
1232                         || !_req->buf || !list_empty(&req->queue))) {
1233                 if (!_req)
1234                         dprintk(DEBUG_NORMAL, "%s: 1 X X X\n", __func__);
1235                 else {
1236                         dprintk(DEBUG_NORMAL, "%s: 0 %01d %01d %01d\n",
1237                                 __func__, !_req->complete,!_req->buf,
1238                                 !list_empty(&req->queue));
1239                 }
1240
1241                 local_irq_restore(flags);
1242                 return -EINVAL;
1243         }
1244
1245         _req->status = -EINPROGRESS;
1246         _req->actual = 0;
1247
1248         dprintk(DEBUG_VERBOSE, "%s: ep%x len %d\n",
1249                  __func__, ep->bEndpointAddress, _req->length);
1250
1251         if (ep->bEndpointAddress) {
1252                 udc_write(ep->bEndpointAddress & 0x7F, S3C2410_UDC_INDEX_REG);
1253
1254                 ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
1255                                 ? S3C2410_UDC_IN_CSR1_REG
1256                                 : S3C2410_UDC_OUT_CSR1_REG);
1257                 fifo_count = s3c2410_udc_fifo_count_out();
1258         } else {
1259                 udc_write(0, S3C2410_UDC_INDEX_REG);
1260                 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
1261                 fifo_count = s3c2410_udc_fifo_count_out();
1262         }
1263
1264         /* kickstart this i/o queue? */
1265         if (list_empty(&ep->queue) && !ep->halted) {
1266                 if (ep->bEndpointAddress == 0 /* ep0 */) {
1267                         switch (dev->ep0state) {
1268                         case EP0_IN_DATA_PHASE:
1269                                 if (!(ep_csr&S3C2410_UDC_EP0_CSR_IPKRDY)
1270                                                 && s3c2410_udc_write_fifo(ep,
1271                                                         req)) {
1272                                         dev->ep0state = EP0_IDLE;
1273                                         req = NULL;
1274                                 }
1275                                 break;
1276
1277                         case EP0_OUT_DATA_PHASE:
1278                                 if ((!_req->length)
1279                                         || ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1280                                                 && s3c2410_udc_read_fifo(ep,
1281                                                         req))) {
1282                                         dev->ep0state = EP0_IDLE;
1283                                         req = NULL;
1284                                 }
1285                                 break;
1286
1287                         default:
1288                                 local_irq_restore(flags);
1289                                 return -EL2HLT;
1290                         }
1291                 } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0
1292                                 && (!(ep_csr&S3C2410_UDC_OCSR1_PKTRDY))
1293                                 && s3c2410_udc_write_fifo(ep, req)) {
1294                         req = NULL;
1295                 } else if ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1296                                 && fifo_count
1297                                 && s3c2410_udc_read_fifo(ep, req)) {
1298                         req = NULL;
1299                 }
1300         }
1301
1302         /* pio or dma irq handler advances the queue. */
1303         if (likely (req != 0))
1304                 list_add_tail(&req->queue, &ep->queue);
1305
1306         local_irq_restore(flags);
1307
1308         dprintk(DEBUG_VERBOSE, "%s ok\n", __func__);
1309         return 0;
1310 }
1311
1312 /*
1313  *      s3c2410_udc_dequeue
1314  */
1315 static int s3c2410_udc_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1316 {
1317         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1318         struct s3c2410_udc      *udc;
1319         int                     retval = -EINVAL;
1320         unsigned long           flags;
1321         struct s3c2410_request  *req = NULL;
1322
1323         dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1324
1325         if (!the_controller->driver)
1326                 return -ESHUTDOWN;
1327
1328         if (!_ep || !_req)
1329                 return retval;
1330
1331         udc = to_s3c2410_udc(ep->gadget);
1332
1333         local_irq_save (flags);
1334
1335         list_for_each_entry (req, &ep->queue, queue) {
1336                 if (&req->req == _req) {
1337                         list_del_init (&req->queue);
1338                         _req->status = -ECONNRESET;
1339                         retval = 0;
1340                         break;
1341                 }
1342         }
1343
1344         if (retval == 0) {
1345                 dprintk(DEBUG_VERBOSE,
1346                         "dequeued req %p from %s, len %d buf %p\n",
1347                         req, _ep->name, _req->length, _req->buf);
1348
1349                 s3c2410_udc_done(ep, req, -ECONNRESET);
1350         }
1351
1352         local_irq_restore (flags);
1353         return retval;
1354 }
1355
1356 /*
1357  * s3c2410_udc_set_halt
1358  */
1359 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value)
1360 {
1361         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1362         u32                     ep_csr = 0;
1363         unsigned long           flags;
1364         u32                     idx;
1365
1366         if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1367                 dprintk(DEBUG_NORMAL, "%s: inval 2\n", __func__);
1368                 return -EINVAL;
1369         }
1370
1371         local_irq_save (flags);
1372
1373         idx = ep->bEndpointAddress & 0x7F;
1374
1375         if (idx == 0) {
1376                 s3c2410_udc_set_ep0_ss(base_addr);
1377                 s3c2410_udc_set_ep0_de_out(base_addr);
1378         } else {
1379                 udc_write(idx, S3C2410_UDC_INDEX_REG);
1380                 ep_csr = udc_read((ep->bEndpointAddress &USB_DIR_IN)
1381                                 ? S3C2410_UDC_IN_CSR1_REG
1382                                 : S3C2410_UDC_OUT_CSR1_REG);
1383
1384                 if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
1385                         if (value)
1386                                 udc_write(ep_csr | S3C2410_UDC_ICSR1_SENDSTL,
1387                                         S3C2410_UDC_IN_CSR1_REG);
1388                         else {
1389                                 ep_csr &= ~S3C2410_UDC_ICSR1_SENDSTL;
1390                                 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1391                                 ep_csr |= S3C2410_UDC_ICSR1_CLRDT;
1392                                 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1393                         }
1394                 } else {
1395                         if (value)
1396                                 udc_write(ep_csr | S3C2410_UDC_OCSR1_SENDSTL,
1397                                         S3C2410_UDC_OUT_CSR1_REG);
1398                         else {
1399                                 ep_csr &= ~S3C2410_UDC_OCSR1_SENDSTL;
1400                                 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1401                                 ep_csr |= S3C2410_UDC_OCSR1_CLRDT;
1402                                 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1403                         }
1404                 }
1405         }
1406
1407         ep->halted = value ? 1 : 0;
1408         local_irq_restore (flags);
1409
1410         return 0;
1411 }
1412
1413 static const struct usb_ep_ops s3c2410_ep_ops = {
1414         .enable         = s3c2410_udc_ep_enable,
1415         .disable        = s3c2410_udc_ep_disable,
1416
1417         .alloc_request  = s3c2410_udc_alloc_request,
1418         .free_request   = s3c2410_udc_free_request,
1419
1420         .queue          = s3c2410_udc_queue,
1421         .dequeue        = s3c2410_udc_dequeue,
1422
1423         .set_halt       = s3c2410_udc_set_halt,
1424 };
1425
1426 /*------------------------- usb_gadget_ops ----------------------------------*/
1427
1428 /*
1429  *      s3c2410_udc_get_frame
1430  */
1431 static int s3c2410_udc_get_frame(struct usb_gadget *_gadget)
1432 {
1433         int tmp;
1434
1435         dprintk(DEBUG_VERBOSE, "%s()\n", __func__);
1436
1437         tmp = udc_read(S3C2410_UDC_FRAME_NUM2_REG) << 8;
1438         tmp |= udc_read(S3C2410_UDC_FRAME_NUM1_REG);
1439         return tmp;
1440 }
1441
1442 /*
1443  *      s3c2410_udc_wakeup
1444  */
1445 static int s3c2410_udc_wakeup(struct usb_gadget *_gadget)
1446 {
1447         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1448         return 0;
1449 }
1450
1451 /*
1452  *      s3c2410_udc_set_selfpowered
1453  */
1454 static int s3c2410_udc_set_selfpowered(struct usb_gadget *gadget, int value)
1455 {
1456         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1457
1458         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1459
1460         if (value)
1461                 udc->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
1462         else
1463                 udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
1464
1465         return 0;
1466 }
1467
1468 static void s3c2410_udc_disable(struct s3c2410_udc *dev);
1469 static void s3c2410_udc_enable(struct s3c2410_udc *dev);
1470
1471 static int s3c2410_udc_set_pullup(struct s3c2410_udc *udc, int is_on)
1472 {
1473         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1474
1475         if (udc_info && (udc_info->udc_command ||
1476                 gpio_is_valid(udc_info->pullup_pin))) {
1477
1478                 if (is_on)
1479                         s3c2410_udc_enable(udc);
1480                 else {
1481                         if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
1482                                 if (udc->driver && udc->driver->disconnect)
1483                                         udc->driver->disconnect(&udc->gadget);
1484
1485                         }
1486                         s3c2410_udc_disable(udc);
1487                 }
1488         }
1489         else
1490                 return -EOPNOTSUPP;
1491
1492         return 0;
1493 }
1494
1495 static int s3c2410_udc_vbus_session(struct usb_gadget *gadget, int is_active)
1496 {
1497         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1498
1499         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1500
1501         udc->vbus = (is_active != 0);
1502         s3c2410_udc_set_pullup(udc, is_active);
1503         return 0;
1504 }
1505
1506 static int s3c2410_udc_pullup(struct usb_gadget *gadget, int is_on)
1507 {
1508         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1509
1510         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1511
1512         s3c2410_udc_set_pullup(udc, is_on ? 0 : 1);
1513         return 0;
1514 }
1515
1516 static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev)
1517 {
1518         struct s3c2410_udc      *dev = _dev;
1519         unsigned int            value;
1520
1521         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1522
1523         value = gpio_get_value(udc_info->vbus_pin) ? 1 : 0;
1524         if (udc_info->vbus_pin_inverted)
1525                 value = !value;
1526
1527         if (value != dev->vbus)
1528                 s3c2410_udc_vbus_session(&dev->gadget, value);
1529
1530         return IRQ_HANDLED;
1531 }
1532
1533 static int s3c2410_vbus_draw(struct usb_gadget *_gadget, unsigned ma)
1534 {
1535         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1536
1537         if (udc_info && udc_info->vbus_draw) {
1538                 udc_info->vbus_draw(ma);
1539                 return 0;
1540         }
1541
1542         return -ENOTSUPP;
1543 }
1544
1545 static int s3c2410_udc_start(struct usb_gadget_driver *driver,
1546                 int (*bind)(struct usb_gadget *));
1547 static int s3c2410_udc_stop(struct usb_gadget_driver *driver);
1548
1549 static const struct usb_gadget_ops s3c2410_ops = {
1550         .get_frame              = s3c2410_udc_get_frame,
1551         .wakeup                 = s3c2410_udc_wakeup,
1552         .set_selfpowered        = s3c2410_udc_set_selfpowered,
1553         .pullup                 = s3c2410_udc_pullup,
1554         .vbus_session           = s3c2410_udc_vbus_session,
1555         .vbus_draw              = s3c2410_vbus_draw,
1556         .start                  = s3c2410_udc_start,
1557         .stop                   = s3c2410_udc_stop,
1558 };
1559
1560 static void s3c2410_udc_command(enum s3c2410_udc_cmd_e cmd)
1561 {
1562         if (!udc_info)
1563                 return;
1564
1565         if (udc_info->udc_command) {
1566                 udc_info->udc_command(cmd);
1567         } else if (gpio_is_valid(udc_info->pullup_pin)) {
1568                 int value;
1569
1570                 switch (cmd) {
1571                 case S3C2410_UDC_P_ENABLE:
1572                         value = 1;
1573                         break;
1574                 case S3C2410_UDC_P_DISABLE:
1575                         value = 0;
1576                         break;
1577                 default:
1578                         return;
1579                 }
1580                 value ^= udc_info->pullup_pin_inverted;
1581
1582                 gpio_set_value(udc_info->pullup_pin, value);
1583         }
1584 }
1585
1586 /*------------------------- gadget driver handling---------------------------*/
1587 /*
1588  * s3c2410_udc_disable
1589  */
1590 static void s3c2410_udc_disable(struct s3c2410_udc *dev)
1591 {
1592         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1593
1594         /* Disable all interrupts */
1595         udc_write(0x00, S3C2410_UDC_USB_INT_EN_REG);
1596         udc_write(0x00, S3C2410_UDC_EP_INT_EN_REG);
1597
1598         /* Clear the interrupt registers */
1599         udc_write(S3C2410_UDC_USBINT_RESET
1600                                 | S3C2410_UDC_USBINT_RESUME
1601                                 | S3C2410_UDC_USBINT_SUSPEND,
1602                         S3C2410_UDC_USB_INT_REG);
1603
1604         udc_write(0x1F, S3C2410_UDC_EP_INT_REG);
1605
1606         /* Good bye, cruel world */
1607         s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
1608
1609         /* Set speed to unknown */
1610         dev->gadget.speed = USB_SPEED_UNKNOWN;
1611 }
1612
1613 /*
1614  * s3c2410_udc_reinit
1615  */
1616 static void s3c2410_udc_reinit(struct s3c2410_udc *dev)
1617 {
1618         u32 i;
1619
1620         /* device/ep0 records init */
1621         INIT_LIST_HEAD (&dev->gadget.ep_list);
1622         INIT_LIST_HEAD (&dev->gadget.ep0->ep_list);
1623         dev->ep0state = EP0_IDLE;
1624
1625         for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1626                 struct s3c2410_ep *ep = &dev->ep[i];
1627
1628                 if (i != 0)
1629                         list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
1630
1631                 ep->dev = dev;
1632                 ep->desc = NULL;
1633                 ep->halted = 0;
1634                 INIT_LIST_HEAD (&ep->queue);
1635         }
1636 }
1637
1638 /*
1639  * s3c2410_udc_enable
1640  */
1641 static void s3c2410_udc_enable(struct s3c2410_udc *dev)
1642 {
1643         int i;
1644
1645         dprintk(DEBUG_NORMAL, "s3c2410_udc_enable called\n");
1646
1647         /* dev->gadget.speed = USB_SPEED_UNKNOWN; */
1648         dev->gadget.speed = USB_SPEED_FULL;
1649
1650         /* Set MAXP for all endpoints */
1651         for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1652                 udc_write(i, S3C2410_UDC_INDEX_REG);
1653                 udc_write((dev->ep[i].ep.maxpacket & 0x7ff) >> 3,
1654                                 S3C2410_UDC_MAXP_REG);
1655         }
1656
1657         /* Set default power state */
1658         udc_write(DEFAULT_POWER_STATE, S3C2410_UDC_PWR_REG);
1659
1660         /* Enable reset and suspend interrupt interrupts */
1661         udc_write(S3C2410_UDC_USBINT_RESET | S3C2410_UDC_USBINT_SUSPEND,
1662                         S3C2410_UDC_USB_INT_EN_REG);
1663
1664         /* Enable ep0 interrupt */
1665         udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_EN_REG);
1666
1667         /* time to say "hello, world" */
1668         s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
1669 }
1670
1671 static int s3c2410_udc_start(struct usb_gadget_driver *driver,
1672                 int (*bind)(struct usb_gadget *))
1673 {
1674         struct s3c2410_udc *udc = the_controller;
1675         int             retval;
1676
1677         dprintk(DEBUG_NORMAL, "%s() '%s'\n", __func__, driver->driver.name);
1678
1679         /* Sanity checks */
1680         if (!udc)
1681                 return -ENODEV;
1682
1683         if (udc->driver)
1684                 return -EBUSY;
1685
1686         if (!bind || !driver->setup || driver->speed < USB_SPEED_FULL) {
1687                 printk(KERN_ERR "Invalid driver: bind %p setup %p speed %d\n",
1688                         bind, driver->setup, driver->speed);
1689                 return -EINVAL;
1690         }
1691 #if defined(MODULE)
1692         if (!driver->unbind) {
1693                 printk(KERN_ERR "Invalid driver: no unbind method\n");
1694                 return -EINVAL;
1695         }
1696 #endif
1697
1698         /* Hook the driver */
1699         udc->driver = driver;
1700         udc->gadget.dev.driver = &driver->driver;
1701
1702         /* Bind the driver */
1703         if ((retval = device_add(&udc->gadget.dev)) != 0) {
1704                 printk(KERN_ERR "Error in device_add() : %d\n",retval);
1705                 goto register_error;
1706         }
1707
1708         dprintk(DEBUG_NORMAL, "binding gadget driver '%s'\n",
1709                 driver->driver.name);
1710
1711         if ((retval = bind(&udc->gadget)) != 0) {
1712                 device_del(&udc->gadget.dev);
1713                 goto register_error;
1714         }
1715
1716         /* Enable udc */
1717         s3c2410_udc_enable(udc);
1718
1719         return 0;
1720
1721 register_error:
1722         udc->driver = NULL;
1723         udc->gadget.dev.driver = NULL;
1724         return retval;
1725 }
1726
1727 static int s3c2410_udc_stop(struct usb_gadget_driver *driver)
1728 {
1729         struct s3c2410_udc *udc = the_controller;
1730
1731         if (!udc)
1732                 return -ENODEV;
1733
1734         if (!driver || driver != udc->driver || !driver->unbind)
1735                 return -EINVAL;
1736
1737         dprintk(DEBUG_NORMAL, "usb_gadget_unregister_driver() '%s'\n",
1738                 driver->driver.name);
1739
1740         /* report disconnect */
1741         if (driver->disconnect)
1742                 driver->disconnect(&udc->gadget);
1743
1744         driver->unbind(&udc->gadget);
1745
1746         device_del(&udc->gadget.dev);
1747         udc->driver = NULL;
1748
1749         /* Disable udc */
1750         s3c2410_udc_disable(udc);
1751
1752         return 0;
1753 }
1754
1755 /*---------------------------------------------------------------------------*/
1756 static struct s3c2410_udc memory = {
1757         .gadget = {
1758                 .ops            = &s3c2410_ops,
1759                 .ep0            = &memory.ep[0].ep,
1760                 .name           = gadget_name,
1761                 .dev = {
1762                         .init_name      = "gadget",
1763                 },
1764         },
1765
1766         /* control endpoint */
1767         .ep[0] = {
1768                 .num            = 0,
1769                 .ep = {
1770                         .name           = ep0name,
1771                         .ops            = &s3c2410_ep_ops,
1772                         .maxpacket      = EP0_FIFO_SIZE,
1773                 },
1774                 .dev            = &memory,
1775         },
1776
1777         /* first group of endpoints */
1778         .ep[1] = {
1779                 .num            = 1,
1780                 .ep = {
1781                         .name           = "ep1-bulk",
1782                         .ops            = &s3c2410_ep_ops,
1783                         .maxpacket      = EP_FIFO_SIZE,
1784                 },
1785                 .dev            = &memory,
1786                 .fifo_size      = EP_FIFO_SIZE,
1787                 .bEndpointAddress = 1,
1788                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1789         },
1790         .ep[2] = {
1791                 .num            = 2,
1792                 .ep = {
1793                         .name           = "ep2-bulk",
1794                         .ops            = &s3c2410_ep_ops,
1795                         .maxpacket      = EP_FIFO_SIZE,
1796                 },
1797                 .dev            = &memory,
1798                 .fifo_size      = EP_FIFO_SIZE,
1799                 .bEndpointAddress = 2,
1800                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1801         },
1802         .ep[3] = {
1803                 .num            = 3,
1804                 .ep = {
1805                         .name           = "ep3-bulk",
1806                         .ops            = &s3c2410_ep_ops,
1807                         .maxpacket      = EP_FIFO_SIZE,
1808                 },
1809                 .dev            = &memory,
1810                 .fifo_size      = EP_FIFO_SIZE,
1811                 .bEndpointAddress = 3,
1812                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1813         },
1814         .ep[4] = {
1815                 .num            = 4,
1816                 .ep = {
1817                         .name           = "ep4-bulk",
1818                         .ops            = &s3c2410_ep_ops,
1819                         .maxpacket      = EP_FIFO_SIZE,
1820                 },
1821                 .dev            = &memory,
1822                 .fifo_size      = EP_FIFO_SIZE,
1823                 .bEndpointAddress = 4,
1824                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1825         }
1826
1827 };
1828
1829 /*
1830  *      probe - binds to the platform device
1831  */
1832 static int s3c2410_udc_probe(struct platform_device *pdev)
1833 {
1834         struct s3c2410_udc *udc = &memory;
1835         struct device *dev = &pdev->dev;
1836         int retval;
1837         int irq;
1838
1839         dev_dbg(dev, "%s()\n", __func__);
1840
1841         usb_bus_clock = clk_get(NULL, "usb-bus-gadget");
1842         if (IS_ERR(usb_bus_clock)) {
1843                 dev_err(dev, "failed to get usb bus clock source\n");
1844                 return PTR_ERR(usb_bus_clock);
1845         }
1846
1847         clk_enable(usb_bus_clock);
1848
1849         udc_clock = clk_get(NULL, "usb-device");
1850         if (IS_ERR(udc_clock)) {
1851                 dev_err(dev, "failed to get udc clock source\n");
1852                 return PTR_ERR(udc_clock);
1853         }
1854
1855         clk_enable(udc_clock);
1856
1857         mdelay(10);
1858
1859         dev_dbg(dev, "got and enabled clocks\n");
1860
1861         if (strncmp(pdev->name, "s3c2440", 7) == 0) {
1862                 dev_info(dev, "S3C2440: increasing FIFO to 128 bytes\n");
1863                 memory.ep[1].fifo_size = S3C2440_EP_FIFO_SIZE;
1864                 memory.ep[2].fifo_size = S3C2440_EP_FIFO_SIZE;
1865                 memory.ep[3].fifo_size = S3C2440_EP_FIFO_SIZE;
1866                 memory.ep[4].fifo_size = S3C2440_EP_FIFO_SIZE;
1867         }
1868
1869         spin_lock_init (&udc->lock);
1870         udc_info = pdev->dev.platform_data;
1871
1872         rsrc_start = S3C2410_PA_USBDEV;
1873         rsrc_len   = S3C24XX_SZ_USBDEV;
1874
1875         if (!request_mem_region(rsrc_start, rsrc_len, gadget_name))
1876                 return -EBUSY;
1877
1878         base_addr = ioremap(rsrc_start, rsrc_len);
1879         if (!base_addr) {
1880                 retval = -ENOMEM;
1881                 goto err_mem;
1882         }
1883
1884         device_initialize(&udc->gadget.dev);
1885         udc->gadget.dev.parent = &pdev->dev;
1886         udc->gadget.dev.dma_mask = pdev->dev.dma_mask;
1887
1888         the_controller = udc;
1889         platform_set_drvdata(pdev, udc);
1890
1891         s3c2410_udc_disable(udc);
1892         s3c2410_udc_reinit(udc);
1893
1894         /* irq setup after old hardware state is cleaned up */
1895         retval = request_irq(IRQ_USBD, s3c2410_udc_irq,
1896                              0, gadget_name, udc);
1897
1898         if (retval != 0) {
1899                 dev_err(dev, "cannot get irq %i, err %d\n", IRQ_USBD, retval);
1900                 retval = -EBUSY;
1901                 goto err_map;
1902         }
1903
1904         dev_dbg(dev, "got irq %i\n", IRQ_USBD);
1905
1906         if (udc_info && udc_info->vbus_pin > 0) {
1907                 retval = gpio_request(udc_info->vbus_pin, "udc vbus");
1908                 if (retval < 0) {
1909                         dev_err(dev, "cannot claim vbus pin\n");
1910                         goto err_int;
1911                 }
1912
1913                 irq = gpio_to_irq(udc_info->vbus_pin);
1914                 if (irq < 0) {
1915                         dev_err(dev, "no irq for gpio vbus pin\n");
1916                         goto err_gpio_claim;
1917                 }
1918
1919                 retval = request_irq(irq, s3c2410_udc_vbus_irq,
1920                                      IRQF_TRIGGER_RISING
1921                                      | IRQF_TRIGGER_FALLING | IRQF_SHARED,
1922                                      gadget_name, udc);
1923
1924                 if (retval != 0) {
1925                         dev_err(dev, "can't get vbus irq %d, err %d\n",
1926                                 irq, retval);
1927                         retval = -EBUSY;
1928                         goto err_gpio_claim;
1929                 }
1930
1931                 dev_dbg(dev, "got irq %i\n", irq);
1932         } else {
1933                 udc->vbus = 1;
1934         }
1935
1936         if (udc_info && !udc_info->udc_command &&
1937                 gpio_is_valid(udc_info->pullup_pin)) {
1938
1939                 retval = gpio_request_one(udc_info->pullup_pin,
1940                                 udc_info->vbus_pin_inverted ?
1941                                 GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
1942                                 "udc pullup");
1943                 if (retval)
1944                         goto err_vbus_irq;
1945         }
1946
1947         retval = usb_add_gadget_udc(&pdev->dev, &udc->gadget);
1948         if (retval)
1949                 goto err_add_udc;
1950
1951         if (s3c2410_udc_debugfs_root) {
1952                 udc->regs_info = debugfs_create_file("registers", S_IRUGO,
1953                                 s3c2410_udc_debugfs_root,
1954                                 udc, &s3c2410_udc_debugfs_fops);
1955                 if (!udc->regs_info)
1956                         dev_warn(dev, "debugfs file creation failed\n");
1957         }
1958
1959         dev_dbg(dev, "probe ok\n");
1960
1961         return 0;
1962
1963 err_add_udc:
1964         if (udc_info && !udc_info->udc_command &&
1965                         gpio_is_valid(udc_info->pullup_pin))
1966                 gpio_free(udc_info->pullup_pin);
1967 err_vbus_irq:
1968         if (udc_info && udc_info->vbus_pin > 0)
1969                 free_irq(gpio_to_irq(udc_info->vbus_pin), udc);
1970 err_gpio_claim:
1971         if (udc_info && udc_info->vbus_pin > 0)
1972                 gpio_free(udc_info->vbus_pin);
1973 err_int:
1974         free_irq(IRQ_USBD, udc);
1975 err_map:
1976         iounmap(base_addr);
1977 err_mem:
1978         release_mem_region(rsrc_start, rsrc_len);
1979
1980         return retval;
1981 }
1982
1983 /*
1984  *      s3c2410_udc_remove
1985  */
1986 static int s3c2410_udc_remove(struct platform_device *pdev)
1987 {
1988         struct s3c2410_udc *udc = platform_get_drvdata(pdev);
1989         unsigned int irq;
1990
1991         dev_dbg(&pdev->dev, "%s()\n", __func__);
1992
1993         usb_del_gadget_udc(&udc->gadget);
1994         if (udc->driver)
1995                 return -EBUSY;
1996
1997         debugfs_remove(udc->regs_info);
1998
1999         if (udc_info && !udc_info->udc_command &&
2000                 gpio_is_valid(udc_info->pullup_pin))
2001                 gpio_free(udc_info->pullup_pin);
2002
2003         if (udc_info && udc_info->vbus_pin > 0) {
2004                 irq = gpio_to_irq(udc_info->vbus_pin);
2005                 free_irq(irq, udc);
2006         }
2007
2008         free_irq(IRQ_USBD, udc);
2009
2010         iounmap(base_addr);
2011         release_mem_region(rsrc_start, rsrc_len);
2012
2013         platform_set_drvdata(pdev, NULL);
2014
2015         if (!IS_ERR(udc_clock) && udc_clock != NULL) {
2016                 clk_disable(udc_clock);
2017                 clk_put(udc_clock);
2018                 udc_clock = NULL;
2019         }
2020
2021         if (!IS_ERR(usb_bus_clock) && usb_bus_clock != NULL) {
2022                 clk_disable(usb_bus_clock);
2023                 clk_put(usb_bus_clock);
2024                 usb_bus_clock = NULL;
2025         }
2026
2027         dev_dbg(&pdev->dev, "%s: remove ok\n", __func__);
2028         return 0;
2029 }
2030
2031 #ifdef CONFIG_PM
2032 static int s3c2410_udc_suspend(struct platform_device *pdev, pm_message_t message)
2033 {
2034         s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
2035
2036         return 0;
2037 }
2038
2039 static int s3c2410_udc_resume(struct platform_device *pdev)
2040 {
2041         s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
2042
2043         return 0;
2044 }
2045 #else
2046 #define s3c2410_udc_suspend     NULL
2047 #define s3c2410_udc_resume      NULL
2048 #endif
2049
2050 static const struct platform_device_id s3c_udc_ids[] = {
2051         { "s3c2410-usbgadget", },
2052         { "s3c2440-usbgadget", },
2053         { }
2054 };
2055 MODULE_DEVICE_TABLE(platform, s3c_udc_ids);
2056
2057 static struct platform_driver udc_driver_24x0 = {
2058         .driver         = {
2059                 .name   = "s3c24x0-usbgadget",
2060                 .owner  = THIS_MODULE,
2061         },
2062         .probe          = s3c2410_udc_probe,
2063         .remove         = s3c2410_udc_remove,
2064         .suspend        = s3c2410_udc_suspend,
2065         .resume         = s3c2410_udc_resume,
2066         .id_table       = s3c_udc_ids,
2067 };
2068
2069 static int __init udc_init(void)
2070 {
2071         int retval;
2072
2073         dprintk(DEBUG_NORMAL, "%s: version %s\n", gadget_name, DRIVER_VERSION);
2074
2075         s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name, NULL);
2076         if (IS_ERR(s3c2410_udc_debugfs_root)) {
2077                 printk(KERN_ERR "%s: debugfs dir creation failed %ld\n",
2078                         gadget_name, PTR_ERR(s3c2410_udc_debugfs_root));
2079                 s3c2410_udc_debugfs_root = NULL;
2080         }
2081
2082         retval = platform_driver_register(&udc_driver_24x0);
2083         if (retval)
2084                 goto err;
2085
2086         return 0;
2087
2088 err:
2089         debugfs_remove(s3c2410_udc_debugfs_root);
2090         return retval;
2091 }
2092
2093 static void __exit udc_exit(void)
2094 {
2095         platform_driver_unregister(&udc_driver_24x0);
2096         debugfs_remove(s3c2410_udc_debugfs_root);
2097 }
2098
2099 module_init(udc_init);
2100 module_exit(udc_exit);
2101
2102 MODULE_AUTHOR(DRIVER_AUTHOR);
2103 MODULE_DESCRIPTION(DRIVER_DESC);
2104 MODULE_VERSION(DRIVER_VERSION);
2105 MODULE_LICENSE("GPL");