kernel/drivers/usb/gadget/udc/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 #define pr_fmt(fmt) "s3c2410_udc: " fmt
  16
  17 #include <linux/module.h>
  18 #include <linux/kernel.h>
  19 #include <linux/delay.h>
  20 #include <linux/ioport.h>
  21 #include <linux/sched.h>
  22 #include <linux/slab.h>
  23 #include <linux/errno.h>
  24 #include <linux/init.h>
  25 #include <linux/timer.h>
  26 #include <linux/list.h>
  27 #include <linux/interrupt.h>
  28 #include <linux/platform_device.h>
  29 #include <linux/clk.h>
  30 #include <linux/gpio.h>
  31 #include <linux/prefetch.h>
  32 #include <linux/io.h>
  33
  34 #include <linux/debugfs.h>
  35 #include <linux/seq_file.h>
  36
  37 #include <linux/usb.h>
  38 #include <linux/usb/gadget.h>
  39
  40 #include <asm/byteorder.h>
  41 #include <asm/irq.h>
  42 #include <asm/unaligned.h>
  43 #include <mach/irqs.h>
  44
  45 #include <mach/hardware.h>
  46
  47 #include <plat/regs-udc.h>
  48 #include <linux/platform_data/usb-s3c2410_udc.h>
  49
  50
  51 #include "s3c2410_udc.h"
  52
  53 #define DRIVER_DESC     "S3C2410 USB Device Controller Gadget"
  54 #define DRIVER_VERSION  "29 Apr 2007"
  55 #define DRIVER_AUTHOR   "Herbert Pötzl <herbert@13thfloor.at>, " \
  56                         "Arnaud Patard <arnaud.patard@rtp-net.org>"
  57
  58 static const char               gadget_name[] = "s3c2410_udc";
  59 static const char               driver_desc[] = DRIVER_DESC;
  60
  61 static struct s3c2410_udc       *the_controller;
  62 static struct clk               *udc_clock;
  63 static struct clk               *usb_bus_clock;
  64 static void __iomem             *base_addr;
  65 static u64                      rsrc_start;
  66 static u64                      rsrc_len;
  67 static struct dentry            *s3c2410_udc_debugfs_root;
  68
  69 static inline u32 udc_read(u32 reg)
  70 {
  71         return readb(base_addr + reg);
  72 }
  73
  74 static inline void udc_write(u32 value, u32 reg)
  75 {
  76         writeb(value, base_addr + reg);
  77 }
  78
  79 static inline void udc_writeb(void __iomem *base, u32 value, u32 reg)
  80 {
  81         writeb(value, base + reg);
  82 }
  83
  84 static struct s3c2410_udc_mach_info *udc_info;
  85
  86 /*************************** DEBUG FUNCTION ***************************/
  87 #define DEBUG_NORMAL    1
  88 #define DEBUG_VERBOSE   2
  89
  90 #ifdef CONFIG_USB_S3C2410_DEBUG
  91 #define USB_S3C2410_DEBUG_LEVEL 0
  92
  93 static uint32_t s3c2410_ticks = 0;
  94
  95 __printf(2, 3)
  96 static void dprintk(int level, const char *fmt, ...)
  97 {
  98         static long prevticks;
  99         static int invocation;
 100         struct va_format vaf;
 101         va_list args;
 102
 103         if (level > USB_S3C2410_DEBUG_LEVEL)
 104                 return;
 105
 106         va_start(args, fmt);
 107
 108         vaf.fmt = fmt;
 109         vaf.va = &args;
 110
 111         if (s3c2410_ticks != prevticks) {
 112                 prevticks = s3c2410_ticks;
 113                 invocation = 0;
 114         }
 115
 116         pr_debug("%1lu.%02d USB: %pV", prevticks, invocation++, &vaf);
 117
 118         va_end(args);
 119 }
 120 #else
 121 __printf(2, 3)
 122 static void dprintk(int level, const char *fmt, ...)
 123 {
 124 }
 125 #endif
 126
 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_de_in(void __iomem *base)
 240 {
 241         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 242         udc_writeb(base, (S3C2410_UDC_EP0_CSR_IPKRDY
 243                         | S3C2410_UDC_EP0_CSR_DE),
 244                 S3C2410_UDC_EP0_CSR_REG);
 245 }
 246
 247 /*------------------------- I/O ----------------------------------*/
 248
 249 /*
 250  *      s3c2410_udc_done
 251  */
 252 static void s3c2410_udc_done(struct s3c2410_ep *ep,
 253                 struct s3c2410_request *req, int status)
 254 {
 255         unsigned halted = ep->halted;
 256
 257         list_del_init(&req->queue);
 258
 259         if (likely(req->req.status == -EINPROGRESS))
 260                 req->req.status = status;
 261         else
 262                 status = req->req.status;
 263
 264         ep->halted = 1;
 265         usb_gadget_giveback_request(&ep->ep, &req->req);
 266         ep->halted = halted;
 267 }
 268
 269 static void s3c2410_udc_nuke(struct s3c2410_udc *udc,
 270                 struct s3c2410_ep *ep, int status)
 271 {
 272         /* Sanity check */
 273         if (&ep->queue == NULL)
 274                 return;
 275
 276         while (!list_empty(&ep->queue)) {
 277                 struct s3c2410_request *req;
 278                 req = list_entry(ep->queue.next, struct s3c2410_request,
 279                                 queue);
 280                 s3c2410_udc_done(ep, req, status);
 281         }
 282 }
 283
 284 static inline int s3c2410_udc_fifo_count_out(void)
 285 {
 286         int tmp;
 287
 288         tmp = udc_read(S3C2410_UDC_OUT_FIFO_CNT2_REG) << 8;
 289         tmp |= udc_read(S3C2410_UDC_OUT_FIFO_CNT1_REG);
 290         return tmp;
 291 }
 292
 293 /*
 294  *      s3c2410_udc_write_packet
 295  */
 296 static inline int s3c2410_udc_write_packet(int fifo,
 297                 struct s3c2410_request *req,
 298                 unsigned max)
 299 {
 300         unsigned len = min(req->req.length - req->req.actual, max);
 301         u8 *buf = req->req.buf + req->req.actual;
 302
 303         prefetch(buf);
 304
 305         dprintk(DEBUG_VERBOSE, "%s %d %d %d %d\n", __func__,
 306                 req->req.actual, req->req.length, len, req->req.actual + len);
 307
 308         req->req.actual += len;
 309
 310         udelay(5);
 311         writesb(base_addr + fifo, buf, len);
 312         return len;
 313 }
 314
 315 /*
 316  *      s3c2410_udc_write_fifo
 317  *
 318  * return:  0 = still running, 1 = completed, negative = errno
 319  */
 320 static int s3c2410_udc_write_fifo(struct s3c2410_ep *ep,
 321                 struct s3c2410_request *req)
 322 {
 323         unsigned        count;
 324         int             is_last;
 325         u32             idx;
 326         int             fifo_reg;
 327         u32             ep_csr;
 328
 329         idx = ep->bEndpointAddress & 0x7F;
 330         switch (idx) {
 331         default:
 332                 idx = 0;
 333         case 0:
 334                 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
 335                 break;
 336         case 1:
 337                 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
 338                 break;
 339         case 2:
 340                 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
 341                 break;
 342         case 3:
 343                 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
 344                 break;
 345         case 4:
 346                 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
 347                 break;
 348         }
 349
 350         count = s3c2410_udc_write_packet(fifo_reg, req, ep->ep.maxpacket);
 351
 352         /* last packet is often short (sometimes a zlp) */
 353         if (count != ep->ep.maxpacket)
 354                 is_last = 1;
 355         else if (req->req.length != req->req.actual || req->req.zero)
 356                 is_last = 0;
 357         else
 358                 is_last = 2;
 359
 360         /* Only ep0 debug messages are interesting */
 361         if (idx == 0)
 362                 dprintk(DEBUG_NORMAL,
 363                         "Written ep%d %d.%d of %d b [last %d,z %d]\n",
 364                         idx, count, req->req.actual, req->req.length,
 365                         is_last, req->req.zero);
 366
 367         if (is_last) {
 368                 /* The order is important. It prevents sending 2 packets
 369                  * at the same time */
 370
 371                 if (idx == 0) {
 372                         /* Reset signal => no need to say 'data sent' */
 373                         if (!(udc_read(S3C2410_UDC_USB_INT_REG)
 374                                         & S3C2410_UDC_USBINT_RESET))
 375                                 s3c2410_udc_set_ep0_de_in(base_addr);
 376                         ep->dev->ep0state = EP0_IDLE;
 377                 } else {
 378                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 379                         ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 380                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 381                         udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
 382                                         S3C2410_UDC_IN_CSR1_REG);
 383                 }
 384
 385                 s3c2410_udc_done(ep, req, 0);
 386                 is_last = 1;
 387         } else {
 388                 if (idx == 0) {
 389                         /* Reset signal => no need to say 'data sent' */
 390                         if (!(udc_read(S3C2410_UDC_USB_INT_REG)
 391                                         & S3C2410_UDC_USBINT_RESET))
 392                                 s3c2410_udc_set_ep0_ipr(base_addr);
 393                 } else {
 394                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 395                         ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 396                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 397                         udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
 398                                         S3C2410_UDC_IN_CSR1_REG);
 399                 }
 400         }
 401
 402         return is_last;
 403 }
 404
 405 static inline int s3c2410_udc_read_packet(int fifo, u8 *buf,
 406                 struct s3c2410_request *req, unsigned avail)
 407 {
 408         unsigned len;
 409
 410         len = min(req->req.length - req->req.actual, avail);
 411         req->req.actual += len;
 412
 413         readsb(fifo + base_addr, buf, len);
 414         return len;
 415 }
 416
 417 /*
 418  * return:  0 = still running, 1 = queue empty, negative = errno
 419  */
 420 static int s3c2410_udc_read_fifo(struct s3c2410_ep *ep,
 421                                  struct s3c2410_request *req)
 422 {
 423         u8              *buf;
 424         u32             ep_csr;
 425         unsigned        bufferspace;
 426         int             is_last = 1;
 427         unsigned        avail;
 428         int             fifo_count = 0;
 429         u32             idx;
 430         int             fifo_reg;
 431
 432         idx = ep->bEndpointAddress & 0x7F;
 433
 434         switch (idx) {
 435         default:
 436                 idx = 0;
 437         case 0:
 438                 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
 439                 break;
 440         case 1:
 441                 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
 442                 break;
 443         case 2:
 444                 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
 445                 break;
 446         case 3:
 447                 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
 448                 break;
 449         case 4:
 450                 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
 451                 break;
 452         }
 453
 454         if (!req->req.length)
 455                 return 1;
 456
 457         buf = req->req.buf + req->req.actual;
 458         bufferspace = req->req.length - req->req.actual;
 459         if (!bufferspace) {
 460                 dprintk(DEBUG_NORMAL, "%s: buffer full!\n", __func__);
 461                 return -1;
 462         }
 463
 464         udc_write(idx, S3C2410_UDC_INDEX_REG);
 465
 466         fifo_count = s3c2410_udc_fifo_count_out();
 467         dprintk(DEBUG_NORMAL, "%s fifo count : %d\n", __func__, fifo_count);
 468
 469         if (fifo_count > ep->ep.maxpacket)
 470                 avail = ep->ep.maxpacket;
 471         else
 472                 avail = fifo_count;
 473
 474         fifo_count = s3c2410_udc_read_packet(fifo_reg, buf, req, avail);
 475
 476         /* checking this with ep0 is not accurate as we already
 477          * read a control request
 478          **/
 479         if (idx != 0 && fifo_count < ep->ep.maxpacket) {
 480                 is_last = 1;
 481                 /* overflowed this request?  flush extra data */
 482                 if (fifo_count != avail)
 483                         req->req.status = -EOVERFLOW;
 484         } else {
 485                 is_last = (req->req.length <= req->req.actual) ? 1 : 0;
 486         }
 487
 488         udc_write(idx, S3C2410_UDC_INDEX_REG);
 489         fifo_count = s3c2410_udc_fifo_count_out();
 490
 491         /* Only ep0 debug messages are interesting */
 492         if (idx == 0)
 493                 dprintk(DEBUG_VERBOSE, "%s fifo count : %d [last %d]\n",
 494                         __func__, fifo_count, is_last);
 495
 496         if (is_last) {
 497                 if (idx == 0) {
 498                         s3c2410_udc_set_ep0_de_out(base_addr);
 499                         ep->dev->ep0state = EP0_IDLE;
 500                 } else {
 501                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 502                         ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 503                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 504                         udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
 505                                         S3C2410_UDC_OUT_CSR1_REG);
 506                 }
 507
 508                 s3c2410_udc_done(ep, req, 0);
 509         } else {
 510                 if (idx == 0) {
 511                         s3c2410_udc_clear_ep0_opr(base_addr);
 512                 } else {
 513                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 514                         ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 515                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 516                         udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
 517                                         S3C2410_UDC_OUT_CSR1_REG);
 518                 }
 519         }
 520
 521         return is_last;
 522 }
 523
 524 static int s3c2410_udc_read_fifo_crq(struct usb_ctrlrequest *crq)
 525 {
 526         unsigned char *outbuf = (unsigned char *)crq;
 527         int bytes_read = 0;
 528
 529         udc_write(0, S3C2410_UDC_INDEX_REG);
 530
 531         bytes_read = s3c2410_udc_fifo_count_out();
 532
 533         dprintk(DEBUG_NORMAL, "%s: fifo_count=%d\n", __func__, bytes_read);
 534
 535         if (bytes_read > sizeof(struct usb_ctrlrequest))
 536                 bytes_read = sizeof(struct usb_ctrlrequest);
 537
 538         readsb(S3C2410_UDC_EP0_FIFO_REG + base_addr, outbuf, bytes_read);
 539
 540         dprintk(DEBUG_VERBOSE, "%s: len=%d %02x:%02x {%x,%x,%x}\n", __func__,
 541                 bytes_read, crq->bRequest, crq->bRequestType,
 542                 crq->wValue, crq->wIndex, crq->wLength);
 543
 544         return bytes_read;
 545 }
 546
 547 static int s3c2410_udc_get_status(struct s3c2410_udc *dev,
 548                 struct usb_ctrlrequest *crq)
 549 {
 550         u16 status = 0;
 551         u8 ep_num = crq->wIndex & 0x7F;
 552         u8 is_in = crq->wIndex & USB_DIR_IN;
 553
 554         switch (crq->bRequestType & USB_RECIP_MASK) {
 555         case USB_RECIP_INTERFACE:
 556                 break;
 557
 558         case USB_RECIP_DEVICE:
 559                 status = dev->devstatus;
 560                 break;
 561
 562         case USB_RECIP_ENDPOINT:
 563                 if (ep_num > 4 || crq->wLength > 2)
 564                         return 1;
 565
 566                 if (ep_num == 0) {
 567                         udc_write(0, S3C2410_UDC_INDEX_REG);
 568                         status = udc_read(S3C2410_UDC_IN_CSR1_REG);
 569                         status = status & S3C2410_UDC_EP0_CSR_SENDSTL;
 570                 } else {
 571                         udc_write(ep_num, S3C2410_UDC_INDEX_REG);
 572                         if (is_in) {
 573                                 status = udc_read(S3C2410_UDC_IN_CSR1_REG);
 574                                 status = status & S3C2410_UDC_ICSR1_SENDSTL;
 575                         } else {
 576                                 status = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 577                                 status = status & S3C2410_UDC_OCSR1_SENDSTL;
 578                         }
 579                 }
 580
 581                 status = status ? 1 : 0;
 582                 break;
 583
 584         default:
 585                 return 1;
 586         }
 587
 588         /* Seems to be needed to get it working. ouch :( */
 589         udelay(5);
 590         udc_write(status & 0xFF, S3C2410_UDC_EP0_FIFO_REG);
 591         udc_write(status >> 8, S3C2410_UDC_EP0_FIFO_REG);
 592         s3c2410_udc_set_ep0_de_in(base_addr);
 593
 594         return 0;
 595 }
 596 /*------------------------- usb state machine -------------------------------*/
 597 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value);
 598
 599 static void s3c2410_udc_handle_ep0_idle(struct s3c2410_udc *dev,
 600                                         struct s3c2410_ep *ep,
 601                                         struct usb_ctrlrequest *crq,
 602                                         u32 ep0csr)
 603 {
 604         int len, ret, tmp;
 605
 606         /* start control request? */
 607         if (!(ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY))
 608                 return;
 609
 610         s3c2410_udc_nuke(dev, ep, -EPROTO);
 611
 612         len = s3c2410_udc_read_fifo_crq(crq);
 613         if (len != sizeof(*crq)) {
 614                 dprintk(DEBUG_NORMAL, "setup begin: fifo READ ERROR"
 615                         " wanted %d bytes got %d. Stalling out...\n",
 616                         sizeof(*crq), len);
 617                 s3c2410_udc_set_ep0_ss(base_addr);
 618                 return;
 619         }
 620
 621         dprintk(DEBUG_NORMAL, "bRequest = %d bRequestType %d wLength = %d\n",
 622                 crq->bRequest, crq->bRequestType, crq->wLength);
 623
 624         /* cope with automagic for some standard requests. */
 625         dev->req_std = (crq->bRequestType & USB_TYPE_MASK)
 626                 == USB_TYPE_STANDARD;
 627         dev->req_config = 0;
 628         dev->req_pending = 1;
 629
 630         switch (crq->bRequest) {
 631         case USB_REQ_SET_CONFIGURATION:
 632                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_CONFIGURATION ...\n");
 633
 634                 if (crq->bRequestType == USB_RECIP_DEVICE) {
 635                         dev->req_config = 1;
 636                         s3c2410_udc_set_ep0_de_out(base_addr);
 637                 }
 638                 break;
 639
 640         case USB_REQ_SET_INTERFACE:
 641                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_INTERFACE ...\n");
 642
 643                 if (crq->bRequestType == USB_RECIP_INTERFACE) {
 644                         dev->req_config = 1;
 645                         s3c2410_udc_set_ep0_de_out(base_addr);
 646                 }
 647                 break;
 648
 649         case USB_REQ_SET_ADDRESS:
 650                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_ADDRESS ...\n");
 651
 652                 if (crq->bRequestType == USB_RECIP_DEVICE) {
 653                         tmp = crq->wValue & 0x7F;
 654                         dev->address = tmp;
 655                         udc_write((tmp | S3C2410_UDC_FUNCADDR_UPDATE),
 656                                         S3C2410_UDC_FUNC_ADDR_REG);
 657                         s3c2410_udc_set_ep0_de_out(base_addr);
 658                         return;
 659                 }
 660                 break;
 661
 662         case USB_REQ_GET_STATUS:
 663                 dprintk(DEBUG_NORMAL, "USB_REQ_GET_STATUS ...\n");
 664                 s3c2410_udc_clear_ep0_opr(base_addr);
 665
 666                 if (dev->req_std) {
 667                         if (!s3c2410_udc_get_status(dev, crq))
 668                                 return;
 669                 }
 670                 break;
 671
 672         case USB_REQ_CLEAR_FEATURE:
 673                 s3c2410_udc_clear_ep0_opr(base_addr);
 674
 675                 if (crq->bRequestType != USB_RECIP_ENDPOINT)
 676                         break;
 677
 678                 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
 679                         break;
 680
 681                 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 0);
 682                 s3c2410_udc_set_ep0_de_out(base_addr);
 683                 return;
 684
 685         case USB_REQ_SET_FEATURE:
 686                 s3c2410_udc_clear_ep0_opr(base_addr);
 687
 688                 if (crq->bRequestType != USB_RECIP_ENDPOINT)
 689                         break;
 690
 691                 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
 692                         break;
 693
 694                 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 1);
 695                 s3c2410_udc_set_ep0_de_out(base_addr);
 696                 return;
 697
 698         default:
 699                 s3c2410_udc_clear_ep0_opr(base_addr);
 700                 break;
 701         }
 702
 703         if (crq->bRequestType & USB_DIR_IN)
 704                 dev->ep0state = EP0_IN_DATA_PHASE;
 705         else
 706                 dev->ep0state = EP0_OUT_DATA_PHASE;
 707
 708         if (!dev->driver)
 709                 return;
 710
 711         /* deliver the request to the gadget driver */
 712         ret = dev->driver->setup(&dev->gadget, crq);
 713         if (ret < 0) {
 714                 if (dev->req_config) {
 715                         dprintk(DEBUG_NORMAL, "config change %02x fail %d?\n",
 716                                 crq->bRequest, ret);
 717                         return;
 718                 }
 719
 720                 if (ret == -EOPNOTSUPP)
 721                         dprintk(DEBUG_NORMAL, "Operation not supported\n");
 722                 else
 723                         dprintk(DEBUG_NORMAL,
 724                                 "dev->driver->setup failed. (%d)\n", ret);
 725
 726                 udelay(5);
 727                 s3c2410_udc_set_ep0_ss(base_addr);
 728                 s3c2410_udc_set_ep0_de_out(base_addr);
 729                 dev->ep0state = EP0_IDLE;
 730                 /* deferred i/o == no response yet */
 731         } else if (dev->req_pending) {
 732                 dprintk(DEBUG_VERBOSE, "dev->req_pending... what now?\n");
 733                 dev->req_pending = 0;
 734         }
 735
 736         dprintk(DEBUG_VERBOSE, "ep0state %s\n", ep0states[dev->ep0state]);
 737 }
 738
 739 static void s3c2410_udc_handle_ep0(struct s3c2410_udc *dev)
 740 {
 741         u32                     ep0csr;
 742         struct s3c2410_ep       *ep = &dev->ep[0];
 743         struct s3c2410_request  *req;
 744         struct usb_ctrlrequest  crq;
 745
 746         if (list_empty(&ep->queue))
 747                 req = NULL;
 748         else
 749                 req = list_entry(ep->queue.next, struct s3c2410_request, queue);
 750
 751         /* We make the assumption that S3C2410_UDC_IN_CSR1_REG equal to
 752          * S3C2410_UDC_EP0_CSR_REG when index is zero */
 753
 754         udc_write(0, S3C2410_UDC_INDEX_REG);
 755         ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 756
 757         dprintk(DEBUG_NORMAL, "ep0csr %x ep0state %s\n",
 758                 ep0csr, ep0states[dev->ep0state]);
 759
 760         /* clear stall status */
 761         if (ep0csr & S3C2410_UDC_EP0_CSR_SENTSTL) {
 762                 s3c2410_udc_nuke(dev, ep, -EPIPE);
 763                 dprintk(DEBUG_NORMAL, "... clear SENT_STALL ...\n");
 764                 s3c2410_udc_clear_ep0_sst(base_addr);
 765                 dev->ep0state = EP0_IDLE;
 766                 return;
 767         }
 768
 769         /* clear setup end */
 770         if (ep0csr & S3C2410_UDC_EP0_CSR_SE) {
 771                 dprintk(DEBUG_NORMAL, "... serviced SETUP_END ...\n");
 772                 s3c2410_udc_nuke(dev, ep, 0);
 773                 s3c2410_udc_clear_ep0_se(base_addr);
 774                 dev->ep0state = EP0_IDLE;
 775         }
 776
 777         switch (dev->ep0state) {
 778         case EP0_IDLE:
 779                 s3c2410_udc_handle_ep0_idle(dev, ep, &crq, ep0csr);
 780                 break;
 781
 782         case EP0_IN_DATA_PHASE:                 /* GET_DESCRIPTOR etc */
 783                 dprintk(DEBUG_NORMAL, "EP0_IN_DATA_PHASE ... what now?\n");
 784                 if (!(ep0csr & S3C2410_UDC_EP0_CSR_IPKRDY) && req)
 785                         s3c2410_udc_write_fifo(ep, req);
 786                 break;
 787
 788         case EP0_OUT_DATA_PHASE:                /* SET_DESCRIPTOR etc */
 789                 dprintk(DEBUG_NORMAL, "EP0_OUT_DATA_PHASE ... what now?\n");
 790                 if ((ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY) && req)
 791                         s3c2410_udc_read_fifo(ep, req);
 792                 break;
 793
 794         case EP0_END_XFER:
 795                 dprintk(DEBUG_NORMAL, "EP0_END_XFER ... what now?\n");
 796                 dev->ep0state = EP0_IDLE;
 797                 break;
 798
 799         case EP0_STALL:
 800                 dprintk(DEBUG_NORMAL, "EP0_STALL ... what now?\n");
 801                 dev->ep0state = EP0_IDLE;
 802                 break;
 803         }
 804 }
 805
 806 /*
 807  *      handle_ep - Manage I/O endpoints
 808  */
 809
 810 static void s3c2410_udc_handle_ep(struct s3c2410_ep *ep)
 811 {
 812         struct s3c2410_request  *req;
 813         int                     is_in = ep->bEndpointAddress & USB_DIR_IN;
 814         u32                     ep_csr1;
 815         u32                     idx;
 816
 817         if (likely(!list_empty(&ep->queue)))
 818                 req = list_entry(ep->queue.next,
 819                                 struct s3c2410_request, queue);
 820         else
 821                 req = NULL;
 822
 823         idx = ep->bEndpointAddress & 0x7F;
 824
 825         if (is_in) {
 826                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 827                 ep_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
 828                 dprintk(DEBUG_VERBOSE, "ep%01d write csr:%02x %d\n",
 829                         idx, ep_csr1, req ? 1 : 0);
 830
 831                 if (ep_csr1 & S3C2410_UDC_ICSR1_SENTSTL) {
 832                         dprintk(DEBUG_VERBOSE, "st\n");
 833                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 834                         udc_write(ep_csr1 & ~S3C2410_UDC_ICSR1_SENTSTL,
 835                                         S3C2410_UDC_IN_CSR1_REG);
 836                         return;
 837                 }
 838
 839                 if (!(ep_csr1 & S3C2410_UDC_ICSR1_PKTRDY) && req)
 840                         s3c2410_udc_write_fifo(ep, req);
 841         } else {
 842                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 843                 ep_csr1 = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 844                 dprintk(DEBUG_VERBOSE, "ep%01d rd csr:%02x\n", idx, ep_csr1);
 845
 846                 if (ep_csr1 & S3C2410_UDC_OCSR1_SENTSTL) {
 847                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 848                         udc_write(ep_csr1 & ~S3C2410_UDC_OCSR1_SENTSTL,
 849                                         S3C2410_UDC_OUT_CSR1_REG);
 850                         return;
 851                 }
 852
 853                 if ((ep_csr1 & S3C2410_UDC_OCSR1_PKTRDY) && req)
 854                         s3c2410_udc_read_fifo(ep, req);
 855         }
 856 }
 857
 858 #include <mach/regs-irq.h>
 859
 860 /*
 861  *      s3c2410_udc_irq - interrupt handler
 862  */
 863 static irqreturn_t s3c2410_udc_irq(int dummy, void *_dev)
 864 {
 865         struct s3c2410_udc *dev = _dev;
 866         int usb_status;
 867         int usbd_status;
 868         int pwr_reg;
 869         int ep0csr;
 870         int i;
 871         u32 idx, idx2;
 872         unsigned long flags;
 873
 874         spin_lock_irqsave(&dev->lock, flags);
 875
 876         /* Driver connected ? */
 877         if (!dev->driver) {
 878                 /* Clear interrupts */
 879                 udc_write(udc_read(S3C2410_UDC_USB_INT_REG),
 880                                 S3C2410_UDC_USB_INT_REG);
 881                 udc_write(udc_read(S3C2410_UDC_EP_INT_REG),
 882                                 S3C2410_UDC_EP_INT_REG);
 883         }
 884
 885         /* Save index */
 886         idx = udc_read(S3C2410_UDC_INDEX_REG);
 887
 888         /* Read status registers */
 889         usb_status = udc_read(S3C2410_UDC_USB_INT_REG);
 890         usbd_status = udc_read(S3C2410_UDC_EP_INT_REG);
 891         pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
 892
 893         udc_writeb(base_addr, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 894         ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 895
 896         dprintk(DEBUG_NORMAL, "usbs=%02x, usbds=%02x, pwr=%02x ep0csr=%02x\n",
 897                 usb_status, usbd_status, pwr_reg, ep0csr);
 898
 899         /*
 900          * Now, handle interrupts. There's two types :
 901          * - Reset, Resume, Suspend coming -> usb_int_reg
 902          * - EP -> ep_int_reg
 903          */
 904
 905         /* RESET */
 906         if (usb_status & S3C2410_UDC_USBINT_RESET) {
 907                 /* two kind of reset :
 908                  * - reset start -> pwr reg = 8
 909                  * - reset end   -> pwr reg = 0
 910                  **/
 911                 dprintk(DEBUG_NORMAL, "USB reset csr %x pwr %x\n",
 912                         ep0csr, pwr_reg);
 913
 914                 dev->gadget.speed = USB_SPEED_UNKNOWN;
 915                 udc_write(0x00, S3C2410_UDC_INDEX_REG);
 916                 udc_write((dev->ep[0].ep.maxpacket & 0x7ff) >> 3,
 917                                 S3C2410_UDC_MAXP_REG);
 918                 dev->address = 0;
 919
 920                 dev->ep0state = EP0_IDLE;
 921                 dev->gadget.speed = USB_SPEED_FULL;
 922
 923                 /* clear interrupt */
 924                 udc_write(S3C2410_UDC_USBINT_RESET,
 925                                 S3C2410_UDC_USB_INT_REG);
 926
 927                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 928                 spin_unlock_irqrestore(&dev->lock, flags);
 929                 return IRQ_HANDLED;
 930         }
 931
 932         /* RESUME */
 933         if (usb_status & S3C2410_UDC_USBINT_RESUME) {
 934                 dprintk(DEBUG_NORMAL, "USB resume\n");
 935
 936                 /* clear interrupt */
 937                 udc_write(S3C2410_UDC_USBINT_RESUME,
 938                                 S3C2410_UDC_USB_INT_REG);
 939
 940                 if (dev->gadget.speed != USB_SPEED_UNKNOWN
 941                                 && dev->driver
 942                                 && dev->driver->resume)
 943                         dev->driver->resume(&dev->gadget);
 944         }
 945
 946         /* SUSPEND */
 947         if (usb_status & S3C2410_UDC_USBINT_SUSPEND) {
 948                 dprintk(DEBUG_NORMAL, "USB suspend\n");
 949
 950                 /* clear interrupt */
 951                 udc_write(S3C2410_UDC_USBINT_SUSPEND,
 952                                 S3C2410_UDC_USB_INT_REG);
 953
 954                 if (dev->gadget.speed != USB_SPEED_UNKNOWN
 955                                 && dev->driver
 956                                 && dev->driver->suspend)
 957                         dev->driver->suspend(&dev->gadget);
 958
 959                 dev->ep0state = EP0_IDLE;
 960         }
 961
 962         /* EP */
 963         /* control traffic */
 964         /* check on ep0csr != 0 is not a good idea as clearing in_pkt_ready
 965          * generate an interrupt
 966          */
 967         if (usbd_status & S3C2410_UDC_INT_EP0) {
 968                 dprintk(DEBUG_VERBOSE, "USB ep0 irq\n");
 969                 /* Clear the interrupt bit by setting it to 1 */
 970                 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_REG);
 971                 s3c2410_udc_handle_ep0(dev);
 972         }
 973
 974         /* endpoint data transfers */
 975         for (i = 1; i < S3C2410_ENDPOINTS; i++) {
 976                 u32 tmp = 1 << i;
 977                 if (usbd_status & tmp) {
 978                         dprintk(DEBUG_VERBOSE, "USB ep%d irq\n", i);
 979
 980                         /* Clear the interrupt bit by setting it to 1 */
 981                         udc_write(tmp, S3C2410_UDC_EP_INT_REG);
 982                         s3c2410_udc_handle_ep(&dev->ep[i]);
 983                 }
 984         }
 985
 986         /* what else causes this interrupt? a receive! who is it? */
 987         if (!usb_status && !usbd_status && !pwr_reg && !ep0csr) {
 988                 for (i = 1; i < S3C2410_ENDPOINTS; i++) {
 989                         idx2 = udc_read(S3C2410_UDC_INDEX_REG);
 990                         udc_write(i, S3C2410_UDC_INDEX_REG);
 991
 992                         if (udc_read(S3C2410_UDC_OUT_CSR1_REG) & 0x1)
 993                                 s3c2410_udc_handle_ep(&dev->ep[i]);
 994
 995                         /* restore index */
 996                         udc_write(idx2, S3C2410_UDC_INDEX_REG);
 997                 }
 998         }
 999
1000         dprintk(DEBUG_VERBOSE, "irq: %d s3c2410_udc_done.\n", IRQ_USBD);
1001
1002         /* Restore old index */
1003         udc_write(idx, S3C2410_UDC_INDEX_REG);
1004
1005         spin_unlock_irqrestore(&dev->lock, flags);
1006
1007         return IRQ_HANDLED;
1008 }
1009 /*------------------------- s3c2410_ep_ops ----------------------------------*/
1010
1011 static inline struct s3c2410_ep *to_s3c2410_ep(struct usb_ep *ep)
1012 {
1013         return container_of(ep, struct s3c2410_ep, ep);
1014 }
1015
1016 static inline struct s3c2410_udc *to_s3c2410_udc(struct usb_gadget *gadget)
1017 {
1018         return container_of(gadget, struct s3c2410_udc, gadget);
1019 }
1020
1021 static inline struct s3c2410_request *to_s3c2410_req(struct usb_request *req)
1022 {
1023         return container_of(req, struct s3c2410_request, req);
1024 }
1025
1026 /*
1027  *      s3c2410_udc_ep_enable
1028  */
1029 static int s3c2410_udc_ep_enable(struct usb_ep *_ep,
1030                                  const struct usb_endpoint_descriptor *desc)
1031 {
1032         struct s3c2410_udc      *dev;
1033         struct s3c2410_ep       *ep;
1034         u32                     max, tmp;
1035         unsigned long           flags;
1036         u32                     csr1, csr2;
1037         u32                     int_en_reg;
1038
1039         ep = to_s3c2410_ep(_ep);
1040
1041         if (!_ep || !desc
1042                         || _ep->name == ep0name
1043                         || desc->bDescriptorType != USB_DT_ENDPOINT)
1044                 return -EINVAL;
1045
1046         dev = ep->dev;
1047         if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
1048                 return -ESHUTDOWN;
1049
1050         max = usb_endpoint_maxp(desc) & 0x1fff;
1051
1052         local_irq_save(flags);
1053         _ep->maxpacket = max & 0x7ff;
1054         ep->ep.desc = desc;
1055         ep->halted = 0;
1056         ep->bEndpointAddress = desc->bEndpointAddress;
1057
1058         /* set max packet */
1059         udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1060         udc_write(max >> 3, S3C2410_UDC_MAXP_REG);
1061
1062         /* set type, direction, address; reset fifo counters */
1063         if (desc->bEndpointAddress & USB_DIR_IN) {
1064                 csr1 = S3C2410_UDC_ICSR1_FFLUSH|S3C2410_UDC_ICSR1_CLRDT;
1065                 csr2 = S3C2410_UDC_ICSR2_MODEIN|S3C2410_UDC_ICSR2_DMAIEN;
1066
1067                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1068                 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1069                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1070                 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1071         } else {
1072                 /* don't flush in fifo or it will cause endpoint interrupt */
1073                 csr1 = S3C2410_UDC_ICSR1_CLRDT;
1074                 csr2 = S3C2410_UDC_ICSR2_DMAIEN;
1075
1076                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1077                 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1078                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1079                 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1080
1081                 csr1 = S3C2410_UDC_OCSR1_FFLUSH | S3C2410_UDC_OCSR1_CLRDT;
1082                 csr2 = S3C2410_UDC_OCSR2_DMAIEN;
1083
1084                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1085                 udc_write(csr1, S3C2410_UDC_OUT_CSR1_REG);
1086                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1087                 udc_write(csr2, S3C2410_UDC_OUT_CSR2_REG);
1088         }
1089
1090         /* enable irqs */
1091         int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1092         udc_write(int_en_reg | (1 << ep->num), S3C2410_UDC_EP_INT_EN_REG);
1093
1094         /* print some debug message */
1095         tmp = desc->bEndpointAddress;
1096         dprintk(DEBUG_NORMAL, "enable %s(%d) ep%x%s-blk max %02x\n",
1097                  _ep->name, ep->num, tmp,
1098                  desc->bEndpointAddress & USB_DIR_IN ? "in" : "out", max);
1099
1100         local_irq_restore(flags);
1101         s3c2410_udc_set_halt(_ep, 0);
1102
1103         return 0;
1104 }
1105
1106 /*
1107  * s3c2410_udc_ep_disable
1108  */
1109 static int s3c2410_udc_ep_disable(struct usb_ep *_ep)
1110 {
1111         struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1112         unsigned long flags;
1113         u32 int_en_reg;
1114
1115         if (!_ep || !ep->ep.desc) {
1116                 dprintk(DEBUG_NORMAL, "%s not enabled\n",
1117                         _ep ? ep->ep.name : NULL);
1118                 return -EINVAL;
1119         }
1120
1121         local_irq_save(flags);
1122
1123         dprintk(DEBUG_NORMAL, "ep_disable: %s\n", _ep->name);
1124
1125         ep->ep.desc = NULL;
1126         ep->halted = 1;
1127
1128         s3c2410_udc_nuke(ep->dev, ep, -ESHUTDOWN);
1129
1130         /* disable irqs */
1131         int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1132         udc_write(int_en_reg & ~(1<<ep->num), S3C2410_UDC_EP_INT_EN_REG);
1133
1134         local_irq_restore(flags);
1135
1136         dprintk(DEBUG_NORMAL, "%s disabled\n", _ep->name);
1137
1138         return 0;
1139 }
1140
1141 /*
1142  * s3c2410_udc_alloc_request
1143  */
1144 static struct usb_request *
1145 s3c2410_udc_alloc_request(struct usb_ep *_ep, gfp_t mem_flags)
1146 {
1147         struct s3c2410_request *req;
1148
1149         dprintk(DEBUG_VERBOSE, "%s(%p,%d)\n", __func__, _ep, mem_flags);
1150
1151         if (!_ep)
1152                 return NULL;
1153
1154         req = kzalloc(sizeof(struct s3c2410_request), mem_flags);
1155         if (!req)
1156                 return NULL;
1157
1158         INIT_LIST_HEAD(&req->queue);
1159         return &req->req;
1160 }
1161
1162 /*
1163  * s3c2410_udc_free_request
1164  */
1165 static void
1166 s3c2410_udc_free_request(struct usb_ep *_ep, struct usb_request *_req)
1167 {
1168         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1169         struct s3c2410_request  *req = to_s3c2410_req(_req);
1170
1171         dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1172
1173         if (!ep || !_req || (!ep->ep.desc && _ep->name != ep0name))
1174                 return;
1175
1176         WARN_ON(!list_empty(&req->queue));
1177         kfree(req);
1178 }
1179
1180 /*
1181  *      s3c2410_udc_queue
1182  */
1183 static int s3c2410_udc_queue(struct usb_ep *_ep, struct usb_request *_req,
1184                 gfp_t gfp_flags)
1185 {
1186         struct s3c2410_request  *req = to_s3c2410_req(_req);
1187         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1188         struct s3c2410_udc      *dev;
1189         u32                     ep_csr = 0;
1190         int                     fifo_count = 0;
1191         unsigned long           flags;
1192
1193         if (unlikely(!_ep || (!ep->ep.desc && ep->ep.name != ep0name))) {
1194                 dprintk(DEBUG_NORMAL, "%s: invalid args\n", __func__);
1195                 return -EINVAL;
1196         }
1197
1198         dev = ep->dev;
1199         if (unlikely(!dev->driver
1200                         || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
1201                 return -ESHUTDOWN;
1202         }
1203
1204         local_irq_save(flags);
1205
1206         if (unlikely(!_req || !_req->complete
1207                         || !_req->buf || !list_empty(&req->queue))) {
1208                 if (!_req)
1209                         dprintk(DEBUG_NORMAL, "%s: 1 X X X\n", __func__);
1210                 else {
1211                         dprintk(DEBUG_NORMAL, "%s: 0 %01d %01d %01d\n",
1212                                 __func__, !_req->complete, !_req->buf,
1213                                 !list_empty(&req->queue));
1214                 }
1215
1216                 local_irq_restore(flags);
1217                 return -EINVAL;
1218         }
1219
1220         _req->status = -EINPROGRESS;
1221         _req->actual = 0;
1222
1223         dprintk(DEBUG_VERBOSE, "%s: ep%x len %d\n",
1224                  __func__, ep->bEndpointAddress, _req->length);
1225
1226         if (ep->bEndpointAddress) {
1227                 udc_write(ep->bEndpointAddress & 0x7F, S3C2410_UDC_INDEX_REG);
1228
1229                 ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
1230                                 ? S3C2410_UDC_IN_CSR1_REG
1231                                 : S3C2410_UDC_OUT_CSR1_REG);
1232                 fifo_count = s3c2410_udc_fifo_count_out();
1233         } else {
1234                 udc_write(0, S3C2410_UDC_INDEX_REG);
1235                 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
1236                 fifo_count = s3c2410_udc_fifo_count_out();
1237         }
1238
1239         /* kickstart this i/o queue? */
1240         if (list_empty(&ep->queue) && !ep->halted) {
1241                 if (ep->bEndpointAddress == 0 /* ep0 */) {
1242                         switch (dev->ep0state) {
1243                         case EP0_IN_DATA_PHASE:
1244                                 if (!(ep_csr&S3C2410_UDC_EP0_CSR_IPKRDY)
1245                                                 && s3c2410_udc_write_fifo(ep,
1246                                                         req)) {
1247                                         dev->ep0state = EP0_IDLE;
1248                                         req = NULL;
1249                                 }
1250                                 break;
1251
1252                         case EP0_OUT_DATA_PHASE:
1253                                 if ((!_req->length)
1254                                         || ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1255                                                 && s3c2410_udc_read_fifo(ep,
1256                                                         req))) {
1257                                         dev->ep0state = EP0_IDLE;
1258                                         req = NULL;
1259                                 }
1260                                 break;
1261
1262                         default:
1263                                 local_irq_restore(flags);
1264                                 return -EL2HLT;
1265                         }
1266                 } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0
1267                                 && (!(ep_csr&S3C2410_UDC_OCSR1_PKTRDY))
1268                                 && s3c2410_udc_write_fifo(ep, req)) {
1269                         req = NULL;
1270                 } else if ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1271                                 && fifo_count
1272                                 && s3c2410_udc_read_fifo(ep, req)) {
1273                         req = NULL;
1274                 }
1275         }
1276
1277         /* pio or dma irq handler advances the queue. */
1278         if (likely(req))
1279                 list_add_tail(&req->queue, &ep->queue);
1280
1281         local_irq_restore(flags);
1282
1283         dprintk(DEBUG_VERBOSE, "%s ok\n", __func__);
1284         return 0;
1285 }
1286
1287 /*
1288  *      s3c2410_udc_dequeue
1289  */
1290 static int s3c2410_udc_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1291 {
1292         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1293         struct s3c2410_udc      *udc;
1294         int                     retval = -EINVAL;
1295         unsigned long           flags;
1296         struct s3c2410_request  *req = NULL;
1297
1298         dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1299
1300         if (!the_controller->driver)
1301                 return -ESHUTDOWN;
1302
1303         if (!_ep || !_req)
1304                 return retval;
1305
1306         udc = to_s3c2410_udc(ep->gadget);
1307
1308         local_irq_save(flags);
1309
1310         list_for_each_entry(req, &ep->queue, queue) {
1311                 if (&req->req == _req) {
1312                         list_del_init(&req->queue);
1313                         _req->status = -ECONNRESET;
1314                         retval = 0;
1315                         break;
1316                 }
1317         }
1318
1319         if (retval == 0) {
1320                 dprintk(DEBUG_VERBOSE,
1321                         "dequeued req %p from %s, len %d buf %p\n",
1322                         req, _ep->name, _req->length, _req->buf);
1323
1324                 s3c2410_udc_done(ep, req, -ECONNRESET);
1325         }
1326
1327         local_irq_restore(flags);
1328         return retval;
1329 }
1330
1331 /*
1332  * s3c2410_udc_set_halt
1333  */
1334 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value)
1335 {
1336         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1337         u32                     ep_csr = 0;
1338         unsigned long           flags;
1339         u32                     idx;
1340
1341         if (unlikely(!_ep || (!ep->ep.desc && ep->ep.name != ep0name))) {
1342                 dprintk(DEBUG_NORMAL, "%s: inval 2\n", __func__);
1343                 return -EINVAL;
1344         }
1345
1346         local_irq_save(flags);
1347
1348         idx = ep->bEndpointAddress & 0x7F;
1349
1350         if (idx == 0) {
1351                 s3c2410_udc_set_ep0_ss(base_addr);
1352                 s3c2410_udc_set_ep0_de_out(base_addr);
1353         } else {
1354                 udc_write(idx, S3C2410_UDC_INDEX_REG);
1355                 ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
1356                                 ? S3C2410_UDC_IN_CSR1_REG
1357                                 : S3C2410_UDC_OUT_CSR1_REG);
1358
1359                 if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
1360                         if (value)
1361                                 udc_write(ep_csr | S3C2410_UDC_ICSR1_SENDSTL,
1362                                         S3C2410_UDC_IN_CSR1_REG);
1363                         else {
1364                                 ep_csr &= ~S3C2410_UDC_ICSR1_SENDSTL;
1365                                 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1366                                 ep_csr |= S3C2410_UDC_ICSR1_CLRDT;
1367                                 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1368                         }
1369                 } else {
1370                         if (value)
1371                                 udc_write(ep_csr | S3C2410_UDC_OCSR1_SENDSTL,
1372                                         S3C2410_UDC_OUT_CSR1_REG);
1373                         else {
1374                                 ep_csr &= ~S3C2410_UDC_OCSR1_SENDSTL;
1375                                 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1376                                 ep_csr |= S3C2410_UDC_OCSR1_CLRDT;
1377                                 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1378                         }
1379                 }
1380         }
1381
1382         ep->halted = value ? 1 : 0;
1383         local_irq_restore(flags);
1384
1385         return 0;
1386 }
1387
1388 static const struct usb_ep_ops s3c2410_ep_ops = {
1389         .enable         = s3c2410_udc_ep_enable,
1390         .disable        = s3c2410_udc_ep_disable,
1391
1392         .alloc_request  = s3c2410_udc_alloc_request,
1393         .free_request   = s3c2410_udc_free_request,
1394
1395         .queue          = s3c2410_udc_queue,
1396         .dequeue        = s3c2410_udc_dequeue,
1397
1398         .set_halt       = s3c2410_udc_set_halt,
1399 };
1400
1401 /*------------------------- usb_gadget_ops ----------------------------------*/
1402
1403 /*
1404  *      s3c2410_udc_get_frame
1405  */
1406 static int s3c2410_udc_get_frame(struct usb_gadget *_gadget)
1407 {
1408         int tmp;
1409
1410         dprintk(DEBUG_VERBOSE, "%s()\n", __func__);
1411
1412         tmp = udc_read(S3C2410_UDC_FRAME_NUM2_REG) << 8;
1413         tmp |= udc_read(S3C2410_UDC_FRAME_NUM1_REG);
1414         return tmp;
1415 }
1416
1417 /*
1418  *      s3c2410_udc_wakeup
1419  */
1420 static int s3c2410_udc_wakeup(struct usb_gadget *_gadget)
1421 {
1422         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1423         return 0;
1424 }
1425
1426 /*
1427  *      s3c2410_udc_set_selfpowered
1428  */
1429 static int s3c2410_udc_set_selfpowered(struct usb_gadget *gadget, int value)
1430 {
1431         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1432
1433         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1434
1435         gadget->is_selfpowered = (value != 0);
1436         if (value)
1437                 udc->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
1438         else
1439                 udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
1440
1441         return 0;
1442 }
1443
1444 static void s3c2410_udc_disable(struct s3c2410_udc *dev);
1445 static void s3c2410_udc_enable(struct s3c2410_udc *dev);
1446
1447 static int s3c2410_udc_set_pullup(struct s3c2410_udc *udc, int is_on)
1448 {
1449         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1450
1451         if (udc_info && (udc_info->udc_command ||
1452                 gpio_is_valid(udc_info->pullup_pin))) {
1453
1454                 if (is_on)
1455                         s3c2410_udc_enable(udc);
1456                 else {
1457                         if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
1458                                 if (udc->driver && udc->driver->disconnect)
1459                                         udc->driver->disconnect(&udc->gadget);
1460
1461                         }
1462                         s3c2410_udc_disable(udc);
1463                 }
1464         } else {
1465                 return -EOPNOTSUPP;
1466         }
1467
1468         return 0;
1469 }
1470
1471 static int s3c2410_udc_vbus_session(struct usb_gadget *gadget, int is_active)
1472 {
1473         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1474
1475         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1476
1477         udc->vbus = (is_active != 0);
1478         s3c2410_udc_set_pullup(udc, is_active);
1479         return 0;
1480 }
1481
1482 static int s3c2410_udc_pullup(struct usb_gadget *gadget, int is_on)
1483 {
1484         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1485
1486         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1487
1488         s3c2410_udc_set_pullup(udc, is_on);
1489         return 0;
1490 }
1491
1492 static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev)
1493 {
1494         struct s3c2410_udc      *dev = _dev;
1495         unsigned int            value;
1496
1497         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1498
1499         value = gpio_get_value(udc_info->vbus_pin) ? 1 : 0;
1500         if (udc_info->vbus_pin_inverted)
1501                 value = !value;
1502
1503         if (value != dev->vbus)
1504                 s3c2410_udc_vbus_session(&dev->gadget, value);
1505
1506         return IRQ_HANDLED;
1507 }
1508
1509 static int s3c2410_vbus_draw(struct usb_gadget *_gadget, unsigned ma)
1510 {
1511         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1512
1513         if (udc_info && udc_info->vbus_draw) {
1514                 udc_info->vbus_draw(ma);
1515                 return 0;
1516         }
1517
1518         return -ENOTSUPP;
1519 }
1520
1521 static int s3c2410_udc_start(struct usb_gadget *g,
1522                 struct usb_gadget_driver *driver);
1523 static int s3c2410_udc_stop(struct usb_gadget *g);
1524
1525 static const struct usb_gadget_ops s3c2410_ops = {
1526         .get_frame              = s3c2410_udc_get_frame,
1527         .wakeup                 = s3c2410_udc_wakeup,
1528         .set_selfpowered        = s3c2410_udc_set_selfpowered,
1529         .pullup                 = s3c2410_udc_pullup,
1530         .vbus_session           = s3c2410_udc_vbus_session,
1531         .vbus_draw              = s3c2410_vbus_draw,
1532         .udc_start              = s3c2410_udc_start,
1533         .udc_stop               = s3c2410_udc_stop,
1534 };
1535
1536 static void s3c2410_udc_command(enum s3c2410_udc_cmd_e cmd)
1537 {
1538         if (!udc_info)
1539                 return;
1540
1541         if (udc_info->udc_command) {
1542                 udc_info->udc_command(cmd);
1543         } else if (gpio_is_valid(udc_info->pullup_pin)) {
1544                 int value;
1545
1546                 switch (cmd) {
1547                 case S3C2410_UDC_P_ENABLE:
1548                         value = 1;
1549                         break;
1550                 case S3C2410_UDC_P_DISABLE:
1551                         value = 0;
1552                         break;
1553                 default:
1554                         return;
1555                 }
1556                 value ^= udc_info->pullup_pin_inverted;
1557
1558                 gpio_set_value(udc_info->pullup_pin, value);
1559         }
1560 }
1561
1562 /*------------------------- gadget driver handling---------------------------*/
1563 /*
1564  * s3c2410_udc_disable
1565  */
1566 static void s3c2410_udc_disable(struct s3c2410_udc *dev)
1567 {
1568         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1569
1570         /* Disable all interrupts */
1571         udc_write(0x00, S3C2410_UDC_USB_INT_EN_REG);
1572         udc_write(0x00, S3C2410_UDC_EP_INT_EN_REG);
1573
1574         /* Clear the interrupt registers */
1575         udc_write(S3C2410_UDC_USBINT_RESET
1576                                 | S3C2410_UDC_USBINT_RESUME
1577                                 | S3C2410_UDC_USBINT_SUSPEND,
1578                         S3C2410_UDC_USB_INT_REG);
1579
1580         udc_write(0x1F, S3C2410_UDC_EP_INT_REG);
1581
1582         /* Good bye, cruel world */
1583         s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
1584
1585         /* Set speed to unknown */
1586         dev->gadget.speed = USB_SPEED_UNKNOWN;
1587 }
1588
1589 /*
1590  * s3c2410_udc_reinit
1591  */
1592 static void s3c2410_udc_reinit(struct s3c2410_udc *dev)
1593 {
1594         u32 i;
1595
1596         /* device/ep0 records init */
1597         INIT_LIST_HEAD(&dev->gadget.ep_list);
1598         INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
1599         dev->ep0state = EP0_IDLE;
1600
1601         for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1602                 struct s3c2410_ep *ep = &dev->ep[i];
1603
1604                 if (i != 0)
1605                         list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
1606
1607                 ep->dev = dev;
1608                 ep->ep.desc = NULL;
1609                 ep->halted = 0;
1610                 INIT_LIST_HEAD(&ep->queue);
1611                 usb_ep_set_maxpacket_limit(&ep->ep, ep->ep.maxpacket);
1612         }
1613 }
1614
1615 /*
1616  * s3c2410_udc_enable
1617  */
1618 static void s3c2410_udc_enable(struct s3c2410_udc *dev)
1619 {
1620         int i;
1621
1622         dprintk(DEBUG_NORMAL, "s3c2410_udc_enable called\n");
1623
1624         /* dev->gadget.speed = USB_SPEED_UNKNOWN; */
1625         dev->gadget.speed = USB_SPEED_FULL;
1626
1627         /* Set MAXP for all endpoints */
1628         for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1629                 udc_write(i, S3C2410_UDC_INDEX_REG);
1630                 udc_write((dev->ep[i].ep.maxpacket & 0x7ff) >> 3,
1631                                 S3C2410_UDC_MAXP_REG);
1632         }
1633
1634         /* Set default power state */
1635         udc_write(DEFAULT_POWER_STATE, S3C2410_UDC_PWR_REG);
1636
1637         /* Enable reset and suspend interrupt interrupts */
1638         udc_write(S3C2410_UDC_USBINT_RESET | S3C2410_UDC_USBINT_SUSPEND,
1639                         S3C2410_UDC_USB_INT_EN_REG);
1640
1641         /* Enable ep0 interrupt */
1642         udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_EN_REG);
1643
1644         /* time to say "hello, world" */
1645         s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
1646 }
1647
1648 static int s3c2410_udc_start(struct usb_gadget *g,
1649                 struct usb_gadget_driver *driver)
1650 {
1651         struct s3c2410_udc *udc = to_s3c2410(g);
1652
1653         dprintk(DEBUG_NORMAL, "%s() '%s'\n", __func__, driver->driver.name);
1654
1655         /* Hook the driver */
1656         udc->driver = driver;
1657
1658         /* Enable udc */
1659         s3c2410_udc_enable(udc);
1660
1661         return 0;
1662 }
1663
1664 static int s3c2410_udc_stop(struct usb_gadget *g)
1665 {
1666         struct s3c2410_udc *udc = to_s3c2410(g);
1667
1668         udc->driver = NULL;
1669
1670         /* Disable udc */
1671         s3c2410_udc_disable(udc);
1672
1673         return 0;
1674 }
1675
1676 /*---------------------------------------------------------------------------*/
1677 static struct s3c2410_udc memory = {
1678         .gadget = {
1679                 .ops            = &s3c2410_ops,
1680                 .ep0            = &memory.ep[0].ep,
1681                 .name           = gadget_name,
1682                 .dev = {
1683                         .init_name      = "gadget",
1684                 },
1685         },
1686
1687         /* control endpoint */
1688         .ep[0] = {
1689                 .num            = 0,
1690                 .ep = {
1691                         .name           = ep0name,
1692                         .ops            = &s3c2410_ep_ops,
1693                         .maxpacket      = EP0_FIFO_SIZE,
1694                         .caps           = USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL,
1695                                                 USB_EP_CAPS_DIR_ALL),
1696                 },
1697                 .dev            = &memory,
1698         },
1699
1700         /* first group of endpoints */
1701         .ep[1] = {
1702                 .num            = 1,
1703                 .ep = {
1704                         .name           = "ep1-bulk",
1705                         .ops            = &s3c2410_ep_ops,
1706                         .maxpacket      = EP_FIFO_SIZE,
1707                         .caps           = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1708                                                 USB_EP_CAPS_DIR_ALL),
1709                 },
1710                 .dev            = &memory,
1711                 .fifo_size      = EP_FIFO_SIZE,
1712                 .bEndpointAddress = 1,
1713                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1714         },
1715         .ep[2] = {
1716                 .num            = 2,
1717                 .ep = {
1718                         .name           = "ep2-bulk",
1719                         .ops            = &s3c2410_ep_ops,
1720                         .maxpacket      = EP_FIFO_SIZE,
1721                         .caps           = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1722                                                 USB_EP_CAPS_DIR_ALL),
1723                 },
1724                 .dev            = &memory,
1725                 .fifo_size      = EP_FIFO_SIZE,
1726                 .bEndpointAddress = 2,
1727                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1728         },
1729         .ep[3] = {
1730                 .num            = 3,
1731                 .ep = {
1732                         .name           = "ep3-bulk",
1733                         .ops            = &s3c2410_ep_ops,
1734                         .maxpacket      = EP_FIFO_SIZE,
1735                         .caps           = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1736                                                 USB_EP_CAPS_DIR_ALL),
1737                 },
1738                 .dev            = &memory,
1739                 .fifo_size      = EP_FIFO_SIZE,
1740                 .bEndpointAddress = 3,
1741                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1742         },
1743         .ep[4] = {
1744                 .num            = 4,
1745                 .ep = {
1746                         .name           = "ep4-bulk",
1747                         .ops            = &s3c2410_ep_ops,
1748                         .maxpacket      = EP_FIFO_SIZE,
1749                         .caps           = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1750                                                 USB_EP_CAPS_DIR_ALL),
1751                 },
1752                 .dev            = &memory,
1753                 .fifo_size      = EP_FIFO_SIZE,
1754                 .bEndpointAddress = 4,
1755                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1756         }
1757
1758 };
1759
1760 /*
1761  *      probe - binds to the platform device
1762  */
1763 static int s3c2410_udc_probe(struct platform_device *pdev)
1764 {
1765         struct s3c2410_udc *udc = &memory;
1766         struct device *dev = &pdev->dev;
1767         int retval;
1768         int irq;
1769
1770         dev_dbg(dev, "%s()\n", __func__);
1771
1772         usb_bus_clock = clk_get(NULL, "usb-bus-gadget");
1773         if (IS_ERR(usb_bus_clock)) {
1774                 dev_err(dev, "failed to get usb bus clock source\n");
1775                 return PTR_ERR(usb_bus_clock);
1776         }
1777
1778         clk_prepare_enable(usb_bus_clock);
1779
1780         udc_clock = clk_get(NULL, "usb-device");
1781         if (IS_ERR(udc_clock)) {
1782                 dev_err(dev, "failed to get udc clock source\n");
1783                 return PTR_ERR(udc_clock);
1784         }
1785
1786         clk_prepare_enable(udc_clock);
1787
1788         mdelay(10);
1789
1790         dev_dbg(dev, "got and enabled clocks\n");
1791
1792         if (strncmp(pdev->name, "s3c2440", 7) == 0) {
1793                 dev_info(dev, "S3C2440: increasing FIFO to 128 bytes\n");
1794                 memory.ep[1].fifo_size = S3C2440_EP_FIFO_SIZE;
1795                 memory.ep[2].fifo_size = S3C2440_EP_FIFO_SIZE;
1796                 memory.ep[3].fifo_size = S3C2440_EP_FIFO_SIZE;
1797                 memory.ep[4].fifo_size = S3C2440_EP_FIFO_SIZE;
1798         }
1799
1800         spin_lock_init(&udc->lock);
1801         udc_info = dev_get_platdata(&pdev->dev);
1802
1803         rsrc_start = S3C2410_PA_USBDEV;
1804         rsrc_len   = S3C24XX_SZ_USBDEV;
1805
1806         if (!request_mem_region(rsrc_start, rsrc_len, gadget_name))
1807                 return -EBUSY;
1808
1809         base_addr = ioremap(rsrc_start, rsrc_len);
1810         if (!base_addr) {
1811                 retval = -ENOMEM;
1812                 goto err_mem;
1813         }
1814
1815         the_controller = udc;
1816         platform_set_drvdata(pdev, udc);
1817
1818         s3c2410_udc_disable(udc);
1819         s3c2410_udc_reinit(udc);
1820
1821         /* irq setup after old hardware state is cleaned up */
1822         retval = request_irq(IRQ_USBD, s3c2410_udc_irq,
1823                              0, gadget_name, udc);
1824
1825         if (retval != 0) {
1826                 dev_err(dev, "cannot get irq %i, err %d\n", IRQ_USBD, retval);
1827                 retval = -EBUSY;
1828                 goto err_map;
1829         }
1830
1831         dev_dbg(dev, "got irq %i\n", IRQ_USBD);
1832
1833         if (udc_info && udc_info->vbus_pin > 0) {
1834                 retval = gpio_request(udc_info->vbus_pin, "udc vbus");
1835                 if (retval < 0) {
1836                         dev_err(dev, "cannot claim vbus pin\n");
1837                         goto err_int;
1838                 }
1839
1840                 irq = gpio_to_irq(udc_info->vbus_pin);
1841                 if (irq < 0) {
1842                         dev_err(dev, "no irq for gpio vbus pin\n");
1843                         retval = irq;
1844                         goto err_gpio_claim;
1845                 }
1846
1847                 retval = request_irq(irq, s3c2410_udc_vbus_irq,
1848                                      IRQF_TRIGGER_RISING
1849                                      | IRQF_TRIGGER_FALLING | IRQF_SHARED,
1850                                      gadget_name, udc);
1851
1852                 if (retval != 0) {
1853                         dev_err(dev, "can't get vbus irq %d, err %d\n",
1854                                 irq, retval);
1855                         retval = -EBUSY;
1856                         goto err_gpio_claim;
1857                 }
1858
1859                 dev_dbg(dev, "got irq %i\n", irq);
1860         } else {
1861                 udc->vbus = 1;
1862         }
1863
1864         if (udc_info && !udc_info->udc_command &&
1865                 gpio_is_valid(udc_info->pullup_pin)) {
1866
1867                 retval = gpio_request_one(udc_info->pullup_pin,
1868                                 udc_info->vbus_pin_inverted ?
1869                                 GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
1870                                 "udc pullup");
1871                 if (retval)
1872                         goto err_vbus_irq;
1873         }
1874
1875         retval = usb_add_gadget_udc(&pdev->dev, &udc->gadget);
1876         if (retval)
1877                 goto err_add_udc;
1878
1879         if (s3c2410_udc_debugfs_root) {
1880                 udc->regs_info = debugfs_create_file("registers", S_IRUGO,
1881                                 s3c2410_udc_debugfs_root,
1882                                 udc, &s3c2410_udc_debugfs_fops);
1883                 if (!udc->regs_info)
1884                         dev_warn(dev, "debugfs file creation failed\n");
1885         }
1886
1887         dev_dbg(dev, "probe ok\n");
1888
1889         return 0;
1890
1891 err_add_udc:
1892         if (udc_info && !udc_info->udc_command &&
1893                         gpio_is_valid(udc_info->pullup_pin))
1894                 gpio_free(udc_info->pullup_pin);
1895 err_vbus_irq:
1896         if (udc_info && udc_info->vbus_pin > 0)
1897                 free_irq(gpio_to_irq(udc_info->vbus_pin), udc);
1898 err_gpio_claim:
1899         if (udc_info && udc_info->vbus_pin > 0)
1900                 gpio_free(udc_info->vbus_pin);
1901 err_int:
1902         free_irq(IRQ_USBD, udc);
1903 err_map:
1904         iounmap(base_addr);
1905 err_mem:
1906         release_mem_region(rsrc_start, rsrc_len);
1907
1908         return retval;
1909 }
1910
1911 /*
1912  *      s3c2410_udc_remove
1913  */
1914 static int s3c2410_udc_remove(struct platform_device *pdev)
1915 {
1916         struct s3c2410_udc *udc = platform_get_drvdata(pdev);
1917         unsigned int irq;
1918
1919         dev_dbg(&pdev->dev, "%s()\n", __func__);
1920
1921         if (udc->driver)
1922                 return -EBUSY;
1923
1924         usb_del_gadget_udc(&udc->gadget);
1925         debugfs_remove(udc->regs_info);
1926
1927         if (udc_info && !udc_info->udc_command &&
1928                 gpio_is_valid(udc_info->pullup_pin))
1929                 gpio_free(udc_info->pullup_pin);
1930
1931         if (udc_info && udc_info->vbus_pin > 0) {
1932                 irq = gpio_to_irq(udc_info->vbus_pin);
1933                 free_irq(irq, udc);
1934         }
1935
1936         free_irq(IRQ_USBD, udc);
1937
1938         iounmap(base_addr);
1939         release_mem_region(rsrc_start, rsrc_len);
1940
1941         if (!IS_ERR(udc_clock) && udc_clock != NULL) {
1942                 clk_disable_unprepare(udc_clock);
1943                 clk_put(udc_clock);
1944                 udc_clock = NULL;
1945         }
1946
1947         if (!IS_ERR(usb_bus_clock) && usb_bus_clock != NULL) {
1948                 clk_disable_unprepare(usb_bus_clock);
1949                 clk_put(usb_bus_clock);
1950                 usb_bus_clock = NULL;
1951         }
1952
1953         dev_dbg(&pdev->dev, "%s: remove ok\n", __func__);
1954         return 0;
1955 }
1956
1957 #ifdef CONFIG_PM
1958 static int
1959 s3c2410_udc_suspend(struct platform_device *pdev, pm_message_t message)
1960 {
1961         s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
1962
1963         return 0;
1964 }
1965
1966 static int s3c2410_udc_resume(struct platform_device *pdev)
1967 {
1968         s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
1969
1970         return 0;
1971 }
1972 #else
1973 #define s3c2410_udc_suspend     NULL
1974 #define s3c2410_udc_resume      NULL
1975 #endif
1976
1977 static const struct platform_device_id s3c_udc_ids[] = {
1978         { "s3c2410-usbgadget", },
1979         { "s3c2440-usbgadget", },
1980         { }
1981 };
1982 MODULE_DEVICE_TABLE(platform, s3c_udc_ids);
1983
1984 static struct platform_driver udc_driver_24x0 = {
1985         .driver         = {
1986                 .name   = "s3c24x0-usbgadget",
1987         },
1988         .probe          = s3c2410_udc_probe,
1989         .remove         = s3c2410_udc_remove,
1990         .suspend        = s3c2410_udc_suspend,
1991         .resume         = s3c2410_udc_resume,
1992         .id_table       = s3c_udc_ids,
1993 };
1994
1995 static int __init udc_init(void)
1996 {
1997         int retval;
1998
1999         dprintk(DEBUG_NORMAL, "%s: version %s\n", gadget_name, DRIVER_VERSION);
2000
2001         s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name, NULL);
2002         if (IS_ERR(s3c2410_udc_debugfs_root)) {
2003                 pr_err("%s: debugfs dir creation failed %ld\n",
2004                         gadget_name, PTR_ERR(s3c2410_udc_debugfs_root));
2005                 s3c2410_udc_debugfs_root = NULL;
2006         }
2007
2008         retval = platform_driver_register(&udc_driver_24x0);
2009         if (retval)
2010                 goto err;
2011
2012         return 0;
2013
2014 err:
2015         debugfs_remove(s3c2410_udc_debugfs_root);
2016         return retval;
2017 }
2018
2019 static void __exit udc_exit(void)
2020 {
2021         platform_driver_unregister(&udc_driver_24x0);
2022         debugfs_remove(s3c2410_udc_debugfs_root);
2023 }
2024
2025 module_init(udc_init);
2026 module_exit(udc_exit);
2027
2028 MODULE_AUTHOR(DRIVER_AUTHOR);
2029 MODULE_DESCRIPTION(DRIVER_DESC);
2030 MODULE_VERSION(DRIVER_VERSION);
2031 MODULE_LICENSE("GPL");