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  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  *
  23  */
  24
  25 #include <linux/module.h>
  26 #include <linux/kernel.h>
  27 #include <linux/delay.h>
  28 #include <linux/ioport.h>
  29 #include <linux/sched.h>
  30 #include <linux/slab.h>
  31 #include <linux/smp_lock.h>
  32 #include <linux/errno.h>
  33 #include <linux/init.h>
  34 #include <linux/timer.h>
  35 #include <linux/list.h>
  36 #include <linux/interrupt.h>
  37 #include <linux/platform_device.h>
  38 #include <linux/version.h>
  39 #include <linux/clk.h>
  40
  41 #include <linux/debugfs.h>
  42 #include <linux/seq_file.h>
  43
  44 #include <linux/usb.h>
  45 #include <linux/usb/gadget.h>
  46
  47 #include <asm/byteorder.h>
  48 #include <asm/io.h>
  49 #include <asm/irq.h>
  50 #include <asm/system.h>
  51 #include <asm/unaligned.h>
  52 #include <asm/arch/irqs.h>
  53
  54 #include <asm/arch/hardware.h>
  55 #include <asm/arch/regs-gpio.h>
  56
  57 #include <asm/plat-s3c24xx/regs-udc.h>
  58 #include <asm/plat-s3c24xx/udc.h>
  59
  60 #include <asm/mach-types.h>
  61
  62 #include "s3c2410_udc.h"
  63
  64 #define DRIVER_DESC     "S3C2410 USB Device Controller Gadget"
  65 #define DRIVER_VERSION  "29 Apr 2007"
  66 #define DRIVER_AUTHOR   "Herbert Pötzl <herbert@13thfloor.at>, " \
  67                         "Arnaud Patard <arnaud.patard@rtp-net.org>"
  68
  69 static const char               gadget_name[] = "s3c2410_udc";
  70 static const char               driver_desc[] = DRIVER_DESC;
  71
  72 static struct s3c2410_udc       *the_controller;
  73 static struct clk               *udc_clock;
  74 static struct clk               *usb_bus_clock;
  75 static void __iomem             *base_addr;
  76 static u64                      rsrc_start;
  77 static u64                      rsrc_len;
  78 static struct dentry            *s3c2410_udc_debugfs_root;
  79
  80 static inline u32 udc_read(u32 reg)
  81 {
  82         return readb(base_addr + reg);
  83 }
  84
  85 static inline void udc_write(u32 value, u32 reg)
  86 {
  87         writeb(value, base_addr + reg);
  88 }
  89
  90 static inline void udc_writeb(void __iomem *base, u32 value, u32 reg)
  91 {
  92         writeb(value, base + reg);
  93 }
  94
  95 static struct s3c2410_udc_mach_info *udc_info;
  96
  97 /*************************** DEBUG FUNCTION ***************************/
  98 #define DEBUG_NORMAL    1
  99 #define DEBUG_VERBOSE   2
 100
 101 #ifdef CONFIG_USB_S3C2410_DEBUG
 102 #define USB_S3C2410_DEBUG_LEVEL 0
 103
 104 static uint32_t s3c2410_ticks = 0;
 105
 106 static int dprintk(int level, const char *fmt, ...)
 107 {
 108         static char printk_buf[1024];
 109         static long prevticks;
 110         static int invocation;
 111         va_list args;
 112         int len;
 113
 114         if (level > USB_S3C2410_DEBUG_LEVEL)
 115                 return 0;
 116
 117         if (s3c2410_ticks != prevticks) {
 118                 prevticks = s3c2410_ticks;
 119                 invocation = 0;
 120         }
 121
 122         len = scnprintf(printk_buf,
 123                         sizeof(printk_buf), "%1lu.%02d USB: ",
 124                         prevticks, invocation++);
 125
 126         va_start(args, fmt);
 127         len = vscnprintf(printk_buf+len,
 128                         sizeof(printk_buf)-len, fmt, args);
 129         va_end(args);
 130
 131         return printk(KERN_DEBUG "%s", printk_buf);
 132 }
 133 #else
 134 static int dprintk(int level, const char *fmt, ...)
 135 {
 136         return 0;
 137 }
 138 #endif
 139 static int s3c2410_udc_debugfs_seq_show(struct seq_file *m, void *p)
 140 {
 141         u32 addr_reg,pwr_reg,ep_int_reg,usb_int_reg;
 142         u32 ep_int_en_reg, usb_int_en_reg, ep0_csr;
 143         u32 ep1_i_csr1,ep1_i_csr2,ep1_o_csr1,ep1_o_csr2;
 144         u32 ep2_i_csr1,ep2_i_csr2,ep2_o_csr1,ep2_o_csr2;
 145
 146         addr_reg       = udc_read(S3C2410_UDC_FUNC_ADDR_REG);
 147         pwr_reg        = udc_read(S3C2410_UDC_PWR_REG);
 148         ep_int_reg     = udc_read(S3C2410_UDC_EP_INT_REG);
 149         usb_int_reg    = udc_read(S3C2410_UDC_USB_INT_REG);
 150         ep_int_en_reg  = udc_read(S3C2410_UDC_EP_INT_EN_REG);
 151         usb_int_en_reg = udc_read(S3C2410_UDC_USB_INT_EN_REG);
 152         udc_write(0, S3C2410_UDC_INDEX_REG);
 153         ep0_csr        = udc_read(S3C2410_UDC_IN_CSR1_REG);
 154         udc_write(1, S3C2410_UDC_INDEX_REG);
 155         ep1_i_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 156         ep1_i_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 157         ep1_o_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 158         ep1_o_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 159         udc_write(2, S3C2410_UDC_INDEX_REG);
 160         ep2_i_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 161         ep2_i_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 162         ep2_o_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 163         ep2_o_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 164
 165         seq_printf(m, "FUNC_ADDR_REG  : 0x%04X\n"
 166                  "PWR_REG        : 0x%04X\n"
 167                  "EP_INT_REG     : 0x%04X\n"
 168                  "USB_INT_REG    : 0x%04X\n"
 169                  "EP_INT_EN_REG  : 0x%04X\n"
 170                  "USB_INT_EN_REG : 0x%04X\n"
 171                  "EP0_CSR        : 0x%04X\n"
 172                  "EP1_I_CSR1     : 0x%04X\n"
 173                  "EP1_I_CSR2     : 0x%04X\n"
 174                  "EP1_O_CSR1     : 0x%04X\n"
 175                  "EP1_O_CSR2     : 0x%04X\n"
 176                  "EP2_I_CSR1     : 0x%04X\n"
 177                  "EP2_I_CSR2     : 0x%04X\n"
 178                  "EP2_O_CSR1     : 0x%04X\n"
 179                  "EP2_O_CSR2     : 0x%04X\n",
 180                         addr_reg,pwr_reg,ep_int_reg,usb_int_reg,
 181                         ep_int_en_reg, usb_int_en_reg, ep0_csr,
 182                         ep1_i_csr1,ep1_i_csr2,ep1_o_csr1,ep1_o_csr2,
 183                         ep2_i_csr1,ep2_i_csr2,ep2_o_csr1,ep2_o_csr2
 184                 );
 185
 186         return 0;
 187 }
 188
 189 static int s3c2410_udc_debugfs_fops_open(struct inode *inode,
 190                                          struct file *file)
 191 {
 192         return single_open(file, s3c2410_udc_debugfs_seq_show, NULL);
 193 }
 194
 195 static const struct file_operations s3c2410_udc_debugfs_fops = {
 196         .open           = s3c2410_udc_debugfs_fops_open,
 197         .read           = seq_read,
 198         .llseek         = seq_lseek,
 199         .release        = single_release,
 200         .owner          = THIS_MODULE,
 201 };
 202
 203 /* io macros */
 204
 205 static inline void s3c2410_udc_clear_ep0_opr(void __iomem *base)
 206 {
 207         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 208         udc_writeb(base, S3C2410_UDC_EP0_CSR_SOPKTRDY,
 209                         S3C2410_UDC_EP0_CSR_REG);
 210 }
 211
 212 static inline void s3c2410_udc_clear_ep0_sst(void __iomem *base)
 213 {
 214         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 215         writeb(0x00, base + S3C2410_UDC_EP0_CSR_REG);
 216 }
 217
 218 static inline void s3c2410_udc_clear_ep0_se(void __iomem *base)
 219 {
 220         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 221         udc_writeb(base, S3C2410_UDC_EP0_CSR_SSE, S3C2410_UDC_EP0_CSR_REG);
 222 }
 223
 224 static inline void s3c2410_udc_set_ep0_ipr(void __iomem *base)
 225 {
 226         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 227         udc_writeb(base, S3C2410_UDC_EP0_CSR_IPKRDY, S3C2410_UDC_EP0_CSR_REG);
 228 }
 229
 230 static inline void s3c2410_udc_set_ep0_de(void __iomem *base)
 231 {
 232         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 233         udc_writeb(base, S3C2410_UDC_EP0_CSR_DE, S3C2410_UDC_EP0_CSR_REG);
 234 }
 235
 236 inline void s3c2410_udc_set_ep0_ss(void __iomem *b)
 237 {
 238         udc_writeb(b, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 239         udc_writeb(b, S3C2410_UDC_EP0_CSR_SENDSTL, S3C2410_UDC_EP0_CSR_REG);
 240 }
 241
 242 static inline void s3c2410_udc_set_ep0_de_out(void __iomem *base)
 243 {
 244         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 245
 246         udc_writeb(base,(S3C2410_UDC_EP0_CSR_SOPKTRDY
 247                                 | S3C2410_UDC_EP0_CSR_DE),
 248                         S3C2410_UDC_EP0_CSR_REG);
 249 }
 250
 251 static inline void s3c2410_udc_set_ep0_sse_out(void __iomem *base)
 252 {
 253         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 254         udc_writeb(base, (S3C2410_UDC_EP0_CSR_SOPKTRDY
 255                                 | S3C2410_UDC_EP0_CSR_SSE),
 256                         S3C2410_UDC_EP0_CSR_REG);
 257 }
 258
 259 static inline void s3c2410_udc_set_ep0_de_in(void __iomem *base)
 260 {
 261         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 262         udc_writeb(base, (S3C2410_UDC_EP0_CSR_IPKRDY
 263                         | S3C2410_UDC_EP0_CSR_DE),
 264                 S3C2410_UDC_EP0_CSR_REG);
 265 }
 266
 267 /*------------------------- I/O ----------------------------------*/
 268
 269 /*
 270  *      s3c2410_udc_done
 271  */
 272 static void s3c2410_udc_done(struct s3c2410_ep *ep,
 273                 struct s3c2410_request *req, int status)
 274 {
 275         unsigned halted = ep->halted;
 276
 277         list_del_init(&req->queue);
 278
 279         if (likely (req->req.status == -EINPROGRESS))
 280                 req->req.status = status;
 281         else
 282                 status = req->req.status;
 283
 284         ep->halted = 1;
 285         req->req.complete(&ep->ep, &req->req);
 286         ep->halted = halted;
 287 }
 288
 289 static void s3c2410_udc_nuke(struct s3c2410_udc *udc,
 290                 struct s3c2410_ep *ep, int status)
 291 {
 292         /* Sanity check */
 293         if (&ep->queue == NULL)
 294                 return;
 295
 296         while (!list_empty (&ep->queue)) {
 297                 struct s3c2410_request *req;
 298                 req = list_entry (ep->queue.next, struct s3c2410_request,
 299                                 queue);
 300                 s3c2410_udc_done(ep, req, status);
 301         }
 302 }
 303
 304 static inline void s3c2410_udc_clear_ep_state(struct s3c2410_udc *dev)
 305 {
 306         unsigned i;
 307
 308         /* hardware SET_{CONFIGURATION,INTERFACE} automagic resets endpoint
 309          * fifos, and pending transactions mustn't be continued in any case.
 310          */
 311
 312         for (i = 1; i < S3C2410_ENDPOINTS; i++)
 313                 s3c2410_udc_nuke(dev, &dev->ep[i], -ECONNABORTED);
 314 }
 315
 316 static inline int s3c2410_udc_fifo_count_out(void)
 317 {
 318         int tmp;
 319
 320         tmp = udc_read(S3C2410_UDC_OUT_FIFO_CNT2_REG) << 8;
 321         tmp |= udc_read(S3C2410_UDC_OUT_FIFO_CNT1_REG);
 322         return tmp;
 323 }
 324
 325 /*
 326  *      s3c2410_udc_write_packet
 327  */
 328 static inline int s3c2410_udc_write_packet(int fifo,
 329                 struct s3c2410_request *req,
 330                 unsigned max)
 331 {
 332         unsigned len = min(req->req.length - req->req.actual, max);
 333         u8 *buf = req->req.buf + req->req.actual;
 334
 335         prefetch(buf);
 336
 337         dprintk(DEBUG_VERBOSE, "%s %d %d %d %d\n", __func__,
 338                 req->req.actual, req->req.length, len, req->req.actual + len);
 339
 340         req->req.actual += len;
 341
 342         udelay(5);
 343         writesb(base_addr + fifo, buf, len);
 344         return len;
 345 }
 346
 347 /*
 348  *      s3c2410_udc_write_fifo
 349  *
 350  * return:  0 = still running, 1 = completed, negative = errno
 351  */
 352 static int s3c2410_udc_write_fifo(struct s3c2410_ep *ep,
 353                 struct s3c2410_request *req)
 354 {
 355         unsigned        count;
 356         int             is_last;
 357         u32             idx;
 358         int             fifo_reg;
 359         u32             ep_csr;
 360
 361         idx = ep->bEndpointAddress & 0x7F;
 362         switch (idx) {
 363         default:
 364                 idx = 0;
 365         case 0:
 366                 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
 367                 break;
 368         case 1:
 369                 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
 370                 break;
 371         case 2:
 372                 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
 373                 break;
 374         case 3:
 375                 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
 376                 break;
 377         case 4:
 378                 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
 379                 break;
 380         }
 381
 382         count = s3c2410_udc_write_packet(fifo_reg, req, ep->ep.maxpacket);
 383
 384         /* last packet is often short (sometimes a zlp) */
 385         if (count != ep->ep.maxpacket)
 386                 is_last = 1;
 387         else if (req->req.length != req->req.actual || req->req.zero)
 388                 is_last = 0;
 389         else
 390                 is_last = 2;
 391
 392         /* Only ep0 debug messages are interesting */
 393         if (idx == 0)
 394                 dprintk(DEBUG_NORMAL,
 395                         "Written ep%d %d.%d of %d b [last %d,z %d]\n",
 396                         idx, count, req->req.actual, req->req.length,
 397                         is_last, req->req.zero);
 398
 399         if (is_last) {
 400                 /* The order is important. It prevents sending 2 packets
 401                  * at the same time */
 402
 403                 if (idx == 0) {
 404                         /* Reset signal => no need to say 'data sent' */
 405                         if (! (udc_read(S3C2410_UDC_USB_INT_REG)
 406                                         & S3C2410_UDC_USBINT_RESET))
 407                                 s3c2410_udc_set_ep0_de_in(base_addr);
 408                         ep->dev->ep0state=EP0_IDLE;
 409                 } else {
 410                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 411                         ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 412                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 413                         udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
 414                                         S3C2410_UDC_IN_CSR1_REG);
 415                 }
 416
 417                 s3c2410_udc_done(ep, req, 0);
 418                 is_last = 1;
 419         } else {
 420                 if (idx == 0) {
 421                         /* Reset signal => no need to say 'data sent' */
 422                         if (! (udc_read(S3C2410_UDC_USB_INT_REG)
 423                                         & S3C2410_UDC_USBINT_RESET))
 424                                 s3c2410_udc_set_ep0_ipr(base_addr);
 425                 } else {
 426                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 427                         ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 428                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 429                         udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
 430                                         S3C2410_UDC_IN_CSR1_REG);
 431                 }
 432         }
 433
 434         return is_last;
 435 }
 436
 437 static inline int s3c2410_udc_read_packet(int fifo, u8 *buf,
 438                 struct s3c2410_request *req, unsigned avail)
 439 {
 440         unsigned len;
 441
 442         len = min(req->req.length - req->req.actual, avail);
 443         req->req.actual += len;
 444
 445         readsb(fifo + base_addr, buf, len);
 446         return len;
 447 }
 448
 449 /*
 450  * return:  0 = still running, 1 = queue empty, negative = errno
 451  */
 452 static int s3c2410_udc_read_fifo(struct s3c2410_ep *ep,
 453                                  struct s3c2410_request *req)
 454 {
 455         u8              *buf;
 456         u32             ep_csr;
 457         unsigned        bufferspace;
 458         int             is_last=1;
 459         unsigned        avail;
 460         int             fifo_count = 0;
 461         u32             idx;
 462         int             fifo_reg;
 463
 464         idx = ep->bEndpointAddress & 0x7F;
 465
 466         switch (idx) {
 467         default:
 468                 idx = 0;
 469         case 0:
 470                 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
 471                 break;
 472         case 1:
 473                 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
 474                 break;
 475         case 2:
 476                 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
 477                 break;
 478         case 3:
 479                 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
 480                 break;
 481         case 4:
 482                 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
 483                 break;
 484         }
 485
 486         if (!req->req.length)
 487                 return 1;
 488
 489         buf = req->req.buf + req->req.actual;
 490         bufferspace = req->req.length - req->req.actual;
 491         if (!bufferspace) {
 492                 dprintk(DEBUG_NORMAL, "%s: buffer full!\n", __func__);
 493                 return -1;
 494         }
 495
 496         udc_write(idx, S3C2410_UDC_INDEX_REG);
 497
 498         fifo_count = s3c2410_udc_fifo_count_out();
 499         dprintk(DEBUG_NORMAL, "%s fifo count : %d\n", __func__, fifo_count);
 500
 501         if (fifo_count > ep->ep.maxpacket)
 502                 avail = ep->ep.maxpacket;
 503         else
 504                 avail = fifo_count;
 505
 506         fifo_count = s3c2410_udc_read_packet(fifo_reg, buf, req, avail);
 507
 508         /* checking this with ep0 is not accurate as we already
 509          * read a control request
 510          **/
 511         if (idx != 0 && fifo_count < ep->ep.maxpacket) {
 512                 is_last = 1;
 513                 /* overflowed this request?  flush extra data */
 514                 if (fifo_count != avail)
 515                         req->req.status = -EOVERFLOW;
 516         } else {
 517                 is_last = (req->req.length <= req->req.actual) ? 1 : 0;
 518         }
 519
 520         udc_write(idx, S3C2410_UDC_INDEX_REG);
 521         fifo_count = s3c2410_udc_fifo_count_out();
 522
 523         /* Only ep0 debug messages are interesting */
 524         if (idx == 0)
 525                 dprintk(DEBUG_VERBOSE, "%s fifo count : %d [last %d]\n",
 526                         __func__, fifo_count,is_last);
 527
 528         if (is_last) {
 529                 if (idx == 0) {
 530                         s3c2410_udc_set_ep0_de_out(base_addr);
 531                         ep->dev->ep0state = EP0_IDLE;
 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                 s3c2410_udc_done(ep, req, 0);
 541         } else {
 542                 if (idx == 0) {
 543                         s3c2410_udc_clear_ep0_opr(base_addr);
 544                 } else {
 545                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 546                         ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 547                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 548                         udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
 549                                         S3C2410_UDC_OUT_CSR1_REG);
 550                 }
 551         }
 552
 553         return is_last;
 554 }
 555
 556 static int s3c2410_udc_read_fifo_crq(struct usb_ctrlrequest *crq)
 557 {
 558         unsigned char *outbuf = (unsigned char*)crq;
 559         int bytes_read = 0;
 560
 561         udc_write(0, S3C2410_UDC_INDEX_REG);
 562
 563         bytes_read = s3c2410_udc_fifo_count_out();
 564
 565         dprintk(DEBUG_NORMAL, "%s: fifo_count=%d\n", __func__, bytes_read);
 566
 567         if (bytes_read > sizeof(struct usb_ctrlrequest))
 568                 bytes_read = sizeof(struct usb_ctrlrequest);
 569
 570         readsb(S3C2410_UDC_EP0_FIFO_REG + base_addr, outbuf, bytes_read);
 571
 572         dprintk(DEBUG_VERBOSE, "%s: len=%d %02x:%02x {%x,%x,%x}\n", __func__,
 573                 bytes_read, crq->bRequest, crq->bRequestType,
 574                 crq->wValue, crq->wIndex, crq->wLength);
 575
 576         return bytes_read;
 577 }
 578
 579 static int s3c2410_udc_get_status(struct s3c2410_udc *dev,
 580                 struct usb_ctrlrequest *crq)
 581 {
 582         u16 status = 0;
 583         u8 ep_num = crq->wIndex & 0x7F;
 584         u8 is_in = crq->wIndex & USB_DIR_IN;
 585
 586         switch (crq->bRequestType & USB_RECIP_MASK) {
 587         case USB_RECIP_INTERFACE:
 588                 break;
 589
 590         case USB_RECIP_DEVICE:
 591                 status = dev->devstatus;
 592                 break;
 593
 594         case USB_RECIP_ENDPOINT:
 595                 if (ep_num > 4 || crq->wLength > 2)
 596                         return 1;
 597
 598                 if (ep_num == 0) {
 599                         udc_write(0, S3C2410_UDC_INDEX_REG);
 600                         status = udc_read(S3C2410_UDC_IN_CSR1_REG);
 601                         status = status & S3C2410_UDC_EP0_CSR_SENDSTL;
 602                 } else {
 603                         udc_write(ep_num, S3C2410_UDC_INDEX_REG);
 604                         if (is_in) {
 605                                 status = udc_read(S3C2410_UDC_IN_CSR1_REG);
 606                                 status = status & S3C2410_UDC_ICSR1_SENDSTL;
 607                         } else {
 608                                 status = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 609                                 status = status & S3C2410_UDC_OCSR1_SENDSTL;
 610                         }
 611                 }
 612
 613                 status = status ? 1 : 0;
 614                 break;
 615
 616         default:
 617                 return 1;
 618         }
 619
 620         /* Seems to be needed to get it working. ouch :( */
 621         udelay(5);
 622         udc_write(status & 0xFF, S3C2410_UDC_EP0_FIFO_REG);
 623         udc_write(status >> 8, S3C2410_UDC_EP0_FIFO_REG);
 624         s3c2410_udc_set_ep0_de_in(base_addr);
 625
 626         return 0;
 627 }
 628 /*------------------------- usb state machine -------------------------------*/
 629 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value);
 630
 631 static void s3c2410_udc_handle_ep0_idle(struct s3c2410_udc *dev,
 632                                         struct s3c2410_ep *ep,
 633                                         struct usb_ctrlrequest *crq,
 634                                         u32 ep0csr)
 635 {
 636         int len, ret, tmp;
 637
 638         /* start control request? */
 639         if (!(ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY))
 640                 return;
 641
 642         s3c2410_udc_nuke(dev, ep, -EPROTO);
 643
 644         len = s3c2410_udc_read_fifo_crq(crq);
 645         if (len != sizeof(*crq)) {
 646                 dprintk(DEBUG_NORMAL, "setup begin: fifo READ ERROR"
 647                         " wanted %d bytes got %d. Stalling out...\n",
 648                         sizeof(*crq), len);
 649                 s3c2410_udc_set_ep0_ss(base_addr);
 650                 return;
 651         }
 652
 653         dprintk(DEBUG_NORMAL, "bRequest = %d bRequestType %d wLength = %d\n",
 654                 crq->bRequest, crq->bRequestType, crq->wLength);
 655
 656         /* cope with automagic for some standard requests. */
 657         dev->req_std = (crq->bRequestType & USB_TYPE_MASK)
 658                 == USB_TYPE_STANDARD;
 659         dev->req_config = 0;
 660         dev->req_pending = 1;
 661
 662         switch (crq->bRequest) {
 663         case USB_REQ_SET_CONFIGURATION:
 664                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_CONFIGURATION ... \n");
 665
 666                 if (crq->bRequestType == USB_RECIP_DEVICE) {
 667                         dev->req_config = 1;
 668                         s3c2410_udc_set_ep0_de_out(base_addr);
 669                 }
 670                 break;
 671
 672         case USB_REQ_SET_INTERFACE:
 673                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_INTERFACE ... \n");
 674
 675                 if (crq->bRequestType == USB_RECIP_INTERFACE) {
 676                         dev->req_config = 1;
 677                         s3c2410_udc_set_ep0_de_out(base_addr);
 678                 }
 679                 break;
 680
 681         case USB_REQ_SET_ADDRESS:
 682                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_ADDRESS ... \n");
 683
 684                 if (crq->bRequestType == USB_RECIP_DEVICE) {
 685                         tmp = crq->wValue & 0x7F;
 686                         dev->address = tmp;
 687                         udc_write((tmp | S3C2410_UDC_FUNCADDR_UPDATE),
 688                                         S3C2410_UDC_FUNC_ADDR_REG);
 689                         s3c2410_udc_set_ep0_de_out(base_addr);
 690                         return;
 691                 }
 692                 break;
 693
 694         case USB_REQ_GET_STATUS:
 695                 dprintk(DEBUG_NORMAL, "USB_REQ_GET_STATUS ... \n");
 696                 s3c2410_udc_clear_ep0_opr(base_addr);
 697
 698                 if (dev->req_std) {
 699                         if (!s3c2410_udc_get_status(dev, crq)) {
 700                                 return;
 701                         }
 702                 }
 703                 break;
 704
 705         case USB_REQ_CLEAR_FEATURE:
 706                 s3c2410_udc_clear_ep0_opr(base_addr);
 707
 708                 if (crq->bRequestType != USB_RECIP_ENDPOINT)
 709                         break;
 710
 711                 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
 712                         break;
 713
 714                 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 0);
 715                 s3c2410_udc_set_ep0_de_out(base_addr);
 716                 return;
 717
 718         case USB_REQ_SET_FEATURE:
 719                 s3c2410_udc_clear_ep0_opr(base_addr);
 720
 721                 if (crq->bRequestType != USB_RECIP_ENDPOINT)
 722                         break;
 723
 724                 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
 725                         break;
 726
 727                 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 1);
 728                 s3c2410_udc_set_ep0_de_out(base_addr);
 729                 return;
 730
 731         default:
 732                 s3c2410_udc_clear_ep0_opr(base_addr);
 733                 break;
 734         }
 735
 736         if (crq->bRequestType & USB_DIR_IN)
 737                 dev->ep0state = EP0_IN_DATA_PHASE;
 738         else
 739                 dev->ep0state = EP0_OUT_DATA_PHASE;
 740
 741         ret = dev->driver->setup(&dev->gadget, crq);
 742         if (ret < 0) {
 743                 if (dev->req_config) {
 744                         dprintk(DEBUG_NORMAL, "config change %02x fail %d?\n",
 745                                 crq->bRequest, ret);
 746                         return;
 747                 }
 748
 749                 if (ret == -EOPNOTSUPP)
 750                         dprintk(DEBUG_NORMAL, "Operation not supported\n");
 751                 else
 752                         dprintk(DEBUG_NORMAL,
 753                                 "dev->driver->setup failed. (%d)\n", ret);
 754
 755                 udelay(5);
 756                 s3c2410_udc_set_ep0_ss(base_addr);
 757                 s3c2410_udc_set_ep0_de_out(base_addr);
 758                 dev->ep0state = EP0_IDLE;
 759                 /* deferred i/o == no response yet */
 760         } else if (dev->req_pending) {
 761                 dprintk(DEBUG_VERBOSE, "dev->req_pending... what now?\n");
 762                 dev->req_pending=0;
 763         }
 764
 765         dprintk(DEBUG_VERBOSE, "ep0state %s\n", ep0states[dev->ep0state]);
 766 }
 767
 768 static void s3c2410_udc_handle_ep0(struct s3c2410_udc *dev)
 769 {
 770         u32                     ep0csr;
 771         struct s3c2410_ep       *ep = &dev->ep[0];
 772         struct s3c2410_request  *req;
 773         struct usb_ctrlrequest  crq;
 774
 775         if (list_empty(&ep->queue))
 776                 req = NULL;
 777         else
 778                 req = list_entry(ep->queue.next, struct s3c2410_request, queue);
 779
 780         /* We make the assumption that S3C2410_UDC_IN_CSR1_REG equal to
 781          * S3C2410_UDC_EP0_CSR_REG when index is zero */
 782
 783         udc_write(0, S3C2410_UDC_INDEX_REG);
 784         ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 785
 786         dprintk(DEBUG_NORMAL, "ep0csr %x ep0state %s\n",
 787                 ep0csr, ep0states[dev->ep0state]);
 788
 789         /* clear stall status */
 790         if (ep0csr & S3C2410_UDC_EP0_CSR_SENTSTL) {
 791                 s3c2410_udc_nuke(dev, ep, -EPIPE);
 792                 dprintk(DEBUG_NORMAL, "... clear SENT_STALL ...\n");
 793                 s3c2410_udc_clear_ep0_sst(base_addr);
 794                 dev->ep0state = EP0_IDLE;
 795                 return;
 796         }
 797
 798         /* clear setup end */
 799         if (ep0csr & S3C2410_UDC_EP0_CSR_SE) {
 800                 dprintk(DEBUG_NORMAL, "... serviced SETUP_END ...\n");
 801                 s3c2410_udc_nuke(dev, ep, 0);
 802                 s3c2410_udc_clear_ep0_se(base_addr);
 803                 dev->ep0state = EP0_IDLE;
 804         }
 805
 806         switch (dev->ep0state) {
 807         case EP0_IDLE:
 808                 s3c2410_udc_handle_ep0_idle(dev, ep, &crq, ep0csr);
 809                 break;
 810
 811         case EP0_IN_DATA_PHASE:                 /* GET_DESCRIPTOR etc */
 812                 dprintk(DEBUG_NORMAL, "EP0_IN_DATA_PHASE ... what now?\n");
 813                 if (!(ep0csr & S3C2410_UDC_EP0_CSR_IPKRDY) && req) {
 814                         s3c2410_udc_write_fifo(ep, req);
 815                 }
 816                 break;
 817
 818         case EP0_OUT_DATA_PHASE:                /* SET_DESCRIPTOR etc */
 819                 dprintk(DEBUG_NORMAL, "EP0_OUT_DATA_PHASE ... what now?\n");
 820                 if ((ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY) && req ) {
 821                         s3c2410_udc_read_fifo(ep,req);
 822                 }
 823                 break;
 824
 825         case EP0_END_XFER:
 826                 dprintk(DEBUG_NORMAL, "EP0_END_XFER ... what now?\n");
 827                 dev->ep0state = EP0_IDLE;
 828                 break;
 829
 830         case EP0_STALL:
 831                 dprintk(DEBUG_NORMAL, "EP0_STALL ... what now?\n");
 832                 dev->ep0state = EP0_IDLE;
 833                 break;
 834         }
 835 }
 836
 837 /*
 838  *      handle_ep - Manage I/O endpoints
 839  */
 840
 841 static void s3c2410_udc_handle_ep(struct s3c2410_ep *ep)
 842 {
 843         struct s3c2410_request  *req;
 844         int                     is_in = ep->bEndpointAddress & USB_DIR_IN;
 845         u32                     ep_csr1;
 846         u32                     idx;
 847
 848         if (likely (!list_empty(&ep->queue)))
 849                 req = list_entry(ep->queue.next,
 850                                 struct s3c2410_request, queue);
 851         else
 852                 req = NULL;
 853
 854         idx = ep->bEndpointAddress & 0x7F;
 855
 856         if (is_in) {
 857                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 858                 ep_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
 859                 dprintk(DEBUG_VERBOSE, "ep%01d write csr:%02x %d\n",
 860                         idx, ep_csr1, req ? 1 : 0);
 861
 862                 if (ep_csr1 & S3C2410_UDC_ICSR1_SENTSTL) {
 863                         dprintk(DEBUG_VERBOSE, "st\n");
 864                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 865                         udc_write(ep_csr1 & ~S3C2410_UDC_ICSR1_SENTSTL,
 866                                         S3C2410_UDC_IN_CSR1_REG);
 867                         return;
 868                 }
 869
 870                 if (!(ep_csr1 & S3C2410_UDC_ICSR1_PKTRDY) && req) {
 871                         s3c2410_udc_write_fifo(ep,req);
 872                 }
 873         } else {
 874                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 875                 ep_csr1 = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 876                 dprintk(DEBUG_VERBOSE, "ep%01d rd csr:%02x\n", idx, ep_csr1);
 877
 878                 if (ep_csr1 & S3C2410_UDC_OCSR1_SENTSTL) {
 879                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 880                         udc_write(ep_csr1 & ~S3C2410_UDC_OCSR1_SENTSTL,
 881                                         S3C2410_UDC_OUT_CSR1_REG);
 882                         return;
 883                 }
 884
 885                 if ((ep_csr1 & S3C2410_UDC_OCSR1_PKTRDY) && req) {
 886                         s3c2410_udc_read_fifo(ep,req);
 887                 }
 888         }
 889 }
 890
 891 #include <asm/arch/regs-irq.h>
 892
 893 /*
 894  *      s3c2410_udc_irq - interrupt handler
 895  */
 896 static irqreturn_t s3c2410_udc_irq(int dummy, void *_dev)
 897 {
 898         struct s3c2410_udc *dev = _dev;
 899         int usb_status;
 900         int usbd_status;
 901         int pwr_reg;
 902         int ep0csr;
 903         int i;
 904         u32 idx;
 905         unsigned long flags;
 906
 907         spin_lock_irqsave(&dev->lock, flags);
 908
 909         /* Driver connected ? */
 910         if (!dev->driver) {
 911                 /* Clear interrupts */
 912                 udc_write(udc_read(S3C2410_UDC_USB_INT_REG),
 913                                 S3C2410_UDC_USB_INT_REG);
 914                 udc_write(udc_read(S3C2410_UDC_EP_INT_REG),
 915                                 S3C2410_UDC_EP_INT_REG);
 916         }
 917
 918         /* Save index */
 919         idx = udc_read(S3C2410_UDC_INDEX_REG);
 920
 921         /* Read status registers */
 922         usb_status = udc_read(S3C2410_UDC_USB_INT_REG);
 923         usbd_status = udc_read(S3C2410_UDC_EP_INT_REG);
 924         pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
 925
 926         udc_writeb(base_addr, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 927         ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 928
 929         dprintk(DEBUG_NORMAL, "usbs=%02x, usbds=%02x, pwr=%02x ep0csr=%02x\n",
 930                 usb_status, usbd_status, pwr_reg, ep0csr);
 931
 932         /*
 933          * Now, handle interrupts. There's two types :
 934          * - Reset, Resume, Suspend coming -> usb_int_reg
 935          * - EP -> ep_int_reg
 936          */
 937
 938         /* RESET */
 939         if (usb_status & S3C2410_UDC_USBINT_RESET) {
 940                 /* two kind of reset :
 941                  * - reset start -> pwr reg = 8
 942                  * - reset end   -> pwr reg = 0
 943                  **/
 944                 dprintk(DEBUG_NORMAL, "USB reset csr %x pwr %x\n",
 945                         ep0csr, pwr_reg);
 946
 947                 dev->gadget.speed = USB_SPEED_UNKNOWN;
 948                 udc_write(0x00, S3C2410_UDC_INDEX_REG);
 949                 udc_write((dev->ep[0].ep.maxpacket & 0x7ff) >> 3,
 950                                 S3C2410_UDC_MAXP_REG);
 951                 dev->address = 0;
 952
 953                 dev->ep0state = EP0_IDLE;
 954                 dev->gadget.speed = USB_SPEED_FULL;
 955
 956                 /* clear interrupt */
 957                 udc_write(S3C2410_UDC_USBINT_RESET,
 958                                 S3C2410_UDC_USB_INT_REG);
 959
 960                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 961                 spin_unlock_irqrestore(&dev->lock, flags);
 962                 return IRQ_HANDLED;
 963         }
 964
 965         /* RESUME */
 966         if (usb_status & S3C2410_UDC_USBINT_RESUME) {
 967                 dprintk(DEBUG_NORMAL, "USB resume\n");
 968
 969                 /* clear interrupt */
 970                 udc_write(S3C2410_UDC_USBINT_RESUME,
 971                                 S3C2410_UDC_USB_INT_REG);
 972
 973                 if (dev->gadget.speed != USB_SPEED_UNKNOWN
 974                                 && dev->driver
 975                                 && dev->driver->resume)
 976                         dev->driver->resume(&dev->gadget);
 977         }
 978
 979         /* SUSPEND */
 980         if (usb_status & S3C2410_UDC_USBINT_SUSPEND) {
 981                 dprintk(DEBUG_NORMAL, "USB suspend\n");
 982
 983                 /* clear interrupt */
 984                 udc_write(S3C2410_UDC_USBINT_SUSPEND,
 985                                 S3C2410_UDC_USB_INT_REG);
 986
 987                 if (dev->gadget.speed != USB_SPEED_UNKNOWN
 988                                 && dev->driver
 989                                 && dev->driver->suspend)
 990                         dev->driver->suspend(&dev->gadget);
 991
 992                 dev->ep0state = EP0_IDLE;
 993         }
 994
 995         /* EP */
 996         /* control traffic */
 997         /* check on ep0csr != 0 is not a good idea as clearing in_pkt_ready
 998          * generate an interrupt
 999          */
1000         if (usbd_status & S3C2410_UDC_INT_EP0) {
1001                 dprintk(DEBUG_VERBOSE, "USB ep0 irq\n");
1002                 /* Clear the interrupt bit by setting it to 1 */
1003                 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_REG);
1004                 s3c2410_udc_handle_ep0(dev);
1005         }
1006
1007         /* endpoint data transfers */
1008         for (i = 1; i < S3C2410_ENDPOINTS; i++) {
1009                 u32 tmp = 1 << i;
1010                 if (usbd_status & tmp) {
1011                         dprintk(DEBUG_VERBOSE, "USB ep%d irq\n", i);
1012
1013                         /* Clear the interrupt bit by setting it to 1 */
1014                         udc_write(tmp, S3C2410_UDC_EP_INT_REG);
1015                         s3c2410_udc_handle_ep(&dev->ep[i]);
1016                 }
1017         }
1018
1019         dprintk(DEBUG_VERBOSE, "irq: %d s3c2410_udc_done.\n", IRQ_USBD);
1020
1021         /* Restore old index */
1022         udc_write(idx, S3C2410_UDC_INDEX_REG);
1023
1024         spin_unlock_irqrestore(&dev->lock, flags);
1025
1026         return IRQ_HANDLED;
1027 }
1028 /*------------------------- s3c2410_ep_ops ----------------------------------*/
1029
1030 static inline struct s3c2410_ep *to_s3c2410_ep(struct usb_ep *ep)
1031 {
1032         return container_of(ep, struct s3c2410_ep, ep);
1033 }
1034
1035 static inline struct s3c2410_udc *to_s3c2410_udc(struct usb_gadget *gadget)
1036 {
1037         return container_of(gadget, struct s3c2410_udc, gadget);
1038 }
1039
1040 static inline struct s3c2410_request *to_s3c2410_req(struct usb_request *req)
1041 {
1042         return container_of(req, struct s3c2410_request, req);
1043 }
1044
1045 /*
1046  *      s3c2410_udc_ep_enable
1047  */
1048 static int s3c2410_udc_ep_enable(struct usb_ep *_ep,
1049                                  const struct usb_endpoint_descriptor *desc)
1050 {
1051         struct s3c2410_udc      *dev;
1052         struct s3c2410_ep       *ep;
1053         u32                     max, tmp;
1054         unsigned long           flags;
1055         u32                     csr1,csr2;
1056         u32                     int_en_reg;
1057
1058         ep = to_s3c2410_ep(_ep);
1059
1060         if (!_ep || !desc || ep->desc
1061                         || _ep->name == ep0name
1062                         || desc->bDescriptorType != USB_DT_ENDPOINT)
1063                 return -EINVAL;
1064
1065         dev = ep->dev;
1066         if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
1067                 return -ESHUTDOWN;
1068
1069         max = le16_to_cpu(desc->wMaxPacketSize) & 0x1fff;
1070
1071         local_irq_save (flags);
1072         _ep->maxpacket = max & 0x7ff;
1073         ep->desc = desc;
1074         ep->halted = 0;
1075         ep->bEndpointAddress = desc->bEndpointAddress;
1076
1077         /* set max packet */
1078         udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1079         udc_write(max >> 3, S3C2410_UDC_MAXP_REG);
1080
1081         /* set type, direction, address; reset fifo counters */
1082         if (desc->bEndpointAddress & USB_DIR_IN) {
1083                 csr1 = S3C2410_UDC_ICSR1_FFLUSH|S3C2410_UDC_ICSR1_CLRDT;
1084                 csr2 = S3C2410_UDC_ICSR2_MODEIN|S3C2410_UDC_ICSR2_DMAIEN;
1085
1086                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1087                 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1088                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1089                 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1090         } else {
1091                 /* don't flush in fifo or it will cause endpoint interrupt */
1092                 csr1 = S3C2410_UDC_ICSR1_CLRDT;
1093                 csr2 = S3C2410_UDC_ICSR2_DMAIEN;
1094
1095                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1096                 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1097                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1098                 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1099
1100                 csr1 = S3C2410_UDC_OCSR1_FFLUSH | S3C2410_UDC_OCSR1_CLRDT;
1101                 csr2 = S3C2410_UDC_OCSR2_DMAIEN;
1102
1103                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1104                 udc_write(csr1, S3C2410_UDC_OUT_CSR1_REG);
1105                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1106                 udc_write(csr2, S3C2410_UDC_OUT_CSR2_REG);
1107         }
1108
1109         /* enable irqs */
1110         int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1111         udc_write(int_en_reg | (1 << ep->num), S3C2410_UDC_EP_INT_EN_REG);
1112
1113         /* print some debug message */
1114         tmp = desc->bEndpointAddress;
1115         dprintk (DEBUG_NORMAL, "enable %s(%d) ep%x%s-blk max %02x\n",
1116                  _ep->name,ep->num, tmp,
1117                  desc->bEndpointAddress & USB_DIR_IN ? "in" : "out", max);
1118
1119         local_irq_restore (flags);
1120         s3c2410_udc_set_halt(_ep, 0);
1121
1122         return 0;
1123 }
1124
1125 /*
1126  * s3c2410_udc_ep_disable
1127  */
1128 static int s3c2410_udc_ep_disable(struct usb_ep *_ep)
1129 {
1130         struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1131         unsigned long flags;
1132         u32 int_en_reg;
1133
1134         if (!_ep || !ep->desc) {
1135                 dprintk(DEBUG_NORMAL, "%s not enabled\n",
1136                         _ep ? ep->ep.name : NULL);
1137                 return -EINVAL;
1138         }
1139
1140         local_irq_save(flags);
1141
1142         dprintk(DEBUG_NORMAL, "ep_disable: %s\n", _ep->name);
1143
1144         ep->desc = NULL;
1145         ep->halted = 1;
1146
1147         s3c2410_udc_nuke (ep->dev, ep, -ESHUTDOWN);
1148
1149         /* disable irqs */
1150         int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1151         udc_write(int_en_reg & ~(1<<ep->num), S3C2410_UDC_EP_INT_EN_REG);
1152
1153         local_irq_restore(flags);
1154
1155         dprintk(DEBUG_NORMAL, "%s disabled\n", _ep->name);
1156
1157         return 0;
1158 }
1159
1160 /*
1161  * s3c2410_udc_alloc_request
1162  */
1163 static struct usb_request *
1164 s3c2410_udc_alloc_request(struct usb_ep *_ep, gfp_t mem_flags)
1165 {
1166         struct s3c2410_request *req;
1167
1168         dprintk(DEBUG_VERBOSE,"%s(%p,%d)\n", __func__, _ep, mem_flags);
1169
1170         if (!_ep)
1171                 return NULL;
1172
1173         req = kzalloc (sizeof(struct s3c2410_request), mem_flags);
1174         if (!req)
1175                 return NULL;
1176
1177         INIT_LIST_HEAD (&req->queue);
1178         return &req->req;
1179 }
1180
1181 /*
1182  * s3c2410_udc_free_request
1183  */
1184 static void
1185 s3c2410_udc_free_request(struct usb_ep *_ep, struct usb_request *_req)
1186 {
1187         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1188         struct s3c2410_request  *req = to_s3c2410_req(_req);
1189
1190         dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1191
1192         if (!ep || !_req || (!ep->desc && _ep->name != ep0name))
1193                 return;
1194
1195         WARN_ON (!list_empty (&req->queue));
1196         kfree(req);
1197 }
1198
1199 /*
1200  *      s3c2410_udc_queue
1201  */
1202 static int s3c2410_udc_queue(struct usb_ep *_ep, struct usb_request *_req,
1203                 gfp_t gfp_flags)
1204 {
1205         struct s3c2410_request  *req = to_s3c2410_req(_req);
1206         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1207         struct s3c2410_udc      *dev;
1208         u32                     ep_csr = 0;
1209         int                     fifo_count = 0;
1210         unsigned long           flags;
1211
1212         if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1213                 dprintk(DEBUG_NORMAL, "%s: invalid args\n", __func__);
1214                 return -EINVAL;
1215         }
1216
1217         dev = ep->dev;
1218         if (unlikely (!dev->driver
1219                         || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
1220                 return -ESHUTDOWN;
1221         }
1222
1223         local_irq_save (flags);
1224
1225         if (unlikely(!_req || !_req->complete
1226                         || !_req->buf || !list_empty(&req->queue))) {
1227                 if (!_req)
1228                         dprintk(DEBUG_NORMAL, "%s: 1 X X X\n", __func__);
1229                 else {
1230                         dprintk(DEBUG_NORMAL, "%s: 0 %01d %01d %01d\n",
1231                                 __func__, !_req->complete,!_req->buf,
1232                                 !list_empty(&req->queue));
1233                 }
1234
1235                 local_irq_restore(flags);
1236                 return -EINVAL;
1237         }
1238
1239         _req->status = -EINPROGRESS;
1240         _req->actual = 0;
1241
1242         dprintk(DEBUG_VERBOSE, "%s: ep%x len %d\n",
1243                  __func__, ep->bEndpointAddress, _req->length);
1244
1245         if (ep->bEndpointAddress) {
1246                 udc_write(ep->bEndpointAddress & 0x7F, S3C2410_UDC_INDEX_REG);
1247
1248                 ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
1249                                 ? S3C2410_UDC_IN_CSR1_REG
1250                                 : S3C2410_UDC_OUT_CSR1_REG);
1251                 fifo_count = s3c2410_udc_fifo_count_out();
1252         } else {
1253                 udc_write(0, S3C2410_UDC_INDEX_REG);
1254                 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
1255                 fifo_count = s3c2410_udc_fifo_count_out();
1256         }
1257
1258         /* kickstart this i/o queue? */
1259         if (list_empty(&ep->queue) && !ep->halted) {
1260                 if (ep->bEndpointAddress == 0 /* ep0 */) {
1261                         switch (dev->ep0state) {
1262                         case EP0_IN_DATA_PHASE:
1263                                 if (!(ep_csr&S3C2410_UDC_EP0_CSR_IPKRDY)
1264                                                 && s3c2410_udc_write_fifo(ep,
1265                                                         req)) {
1266                                         dev->ep0state = EP0_IDLE;
1267                                         req = NULL;
1268                                 }
1269                                 break;
1270
1271                         case EP0_OUT_DATA_PHASE:
1272                                 if ((!_req->length)
1273                                         || ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1274                                                 && s3c2410_udc_read_fifo(ep,
1275                                                         req))) {
1276                                         dev->ep0state = EP0_IDLE;
1277                                         req = NULL;
1278                                 }
1279                                 break;
1280
1281                         default:
1282                                 local_irq_restore(flags);
1283                                 return -EL2HLT;
1284                         }
1285                 } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0
1286                                 && (!(ep_csr&S3C2410_UDC_OCSR1_PKTRDY))
1287                                 && s3c2410_udc_write_fifo(ep, req)) {
1288                         req = NULL;
1289                 } else if ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1290                                 && fifo_count
1291                                 && s3c2410_udc_read_fifo(ep, req)) {
1292                         req = NULL;
1293                 }
1294         }
1295
1296         /* pio or dma irq handler advances the queue. */
1297         if (likely (req != 0))
1298                 list_add_tail(&req->queue, &ep->queue);
1299
1300         local_irq_restore(flags);
1301
1302         dprintk(DEBUG_VERBOSE, "%s ok\n", __func__);
1303         return 0;
1304 }
1305
1306 /*
1307  *      s3c2410_udc_dequeue
1308  */
1309 static int s3c2410_udc_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1310 {
1311         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1312         struct s3c2410_udc      *udc;
1313         int                     retval = -EINVAL;
1314         unsigned long           flags;
1315         struct s3c2410_request  *req = NULL;
1316
1317         dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1318
1319         if (!the_controller->driver)
1320                 return -ESHUTDOWN;
1321
1322         if (!_ep || !_req)
1323                 return retval;
1324
1325         udc = to_s3c2410_udc(ep->gadget);
1326
1327         local_irq_save (flags);
1328
1329         list_for_each_entry (req, &ep->queue, queue) {
1330                 if (&req->req == _req) {
1331                         list_del_init (&req->queue);
1332                         _req->status = -ECONNRESET;
1333                         retval = 0;
1334                         break;
1335                 }
1336         }
1337
1338         if (retval == 0) {
1339                 dprintk(DEBUG_VERBOSE,
1340                         "dequeued req %p from %s, len %d buf %p\n",
1341                         req, _ep->name, _req->length, _req->buf);
1342
1343                 s3c2410_udc_done(ep, req, -ECONNRESET);
1344         }
1345
1346         local_irq_restore (flags);
1347         return retval;
1348 }
1349
1350 /*
1351  * s3c2410_udc_set_halt
1352  */
1353 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value)
1354 {
1355         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1356         u32                     ep_csr = 0;
1357         unsigned long           flags;
1358         u32                     idx;
1359
1360         if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1361                 dprintk(DEBUG_NORMAL, "%s: inval 2\n", __func__);
1362                 return -EINVAL;
1363         }
1364
1365         local_irq_save (flags);
1366
1367         idx = ep->bEndpointAddress & 0x7F;
1368
1369         if (idx == 0) {
1370                 s3c2410_udc_set_ep0_ss(base_addr);
1371                 s3c2410_udc_set_ep0_de_out(base_addr);
1372         } else {
1373                 udc_write(idx, S3C2410_UDC_INDEX_REG);
1374                 ep_csr = udc_read((ep->bEndpointAddress &USB_DIR_IN)
1375                                 ? S3C2410_UDC_IN_CSR1_REG
1376                                 : S3C2410_UDC_OUT_CSR1_REG);
1377
1378                 if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
1379                         if (value)
1380                                 udc_write(ep_csr | S3C2410_UDC_ICSR1_SENDSTL,
1381                                         S3C2410_UDC_IN_CSR1_REG);
1382                         else {
1383                                 ep_csr &= ~S3C2410_UDC_ICSR1_SENDSTL;
1384                                 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1385                                 ep_csr |= S3C2410_UDC_ICSR1_CLRDT;
1386                                 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1387                         }
1388                 } else {
1389                         if (value)
1390                                 udc_write(ep_csr | S3C2410_UDC_OCSR1_SENDSTL,
1391                                         S3C2410_UDC_OUT_CSR1_REG);
1392                         else {
1393                                 ep_csr &= ~S3C2410_UDC_OCSR1_SENDSTL;
1394                                 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1395                                 ep_csr |= S3C2410_UDC_OCSR1_CLRDT;
1396                                 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1397                         }
1398                 }
1399         }
1400
1401         ep->halted = value ? 1 : 0;
1402         local_irq_restore (flags);
1403
1404         return 0;
1405 }
1406
1407 static const struct usb_ep_ops s3c2410_ep_ops = {
1408         .enable         = s3c2410_udc_ep_enable,
1409         .disable        = s3c2410_udc_ep_disable,
1410
1411         .alloc_request  = s3c2410_udc_alloc_request,
1412         .free_request   = s3c2410_udc_free_request,
1413
1414         .queue          = s3c2410_udc_queue,
1415         .dequeue        = s3c2410_udc_dequeue,
1416
1417         .set_halt       = s3c2410_udc_set_halt,
1418 };
1419
1420 /*------------------------- usb_gadget_ops ----------------------------------*/
1421
1422 /*
1423  *      s3c2410_udc_get_frame
1424  */
1425 static int s3c2410_udc_get_frame(struct usb_gadget *_gadget)
1426 {
1427         int tmp;
1428
1429         dprintk(DEBUG_VERBOSE, "%s()\n", __func__);
1430
1431         tmp = udc_read(S3C2410_UDC_FRAME_NUM2_REG) << 8;
1432         tmp |= udc_read(S3C2410_UDC_FRAME_NUM1_REG);
1433         return tmp;
1434 }
1435
1436 /*
1437  *      s3c2410_udc_wakeup
1438  */
1439 static int s3c2410_udc_wakeup(struct usb_gadget *_gadget)
1440 {
1441         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1442         return 0;
1443 }
1444
1445 /*
1446  *      s3c2410_udc_set_selfpowered
1447  */
1448 static int s3c2410_udc_set_selfpowered(struct usb_gadget *gadget, int value)
1449 {
1450         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1451
1452         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1453
1454         if (value)
1455                 udc->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
1456         else
1457                 udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
1458
1459         return 0;
1460 }
1461
1462 static void s3c2410_udc_disable(struct s3c2410_udc *dev);
1463 static void s3c2410_udc_enable(struct s3c2410_udc *dev);
1464
1465 static int s3c2410_udc_set_pullup(struct s3c2410_udc *udc, int is_on)
1466 {
1467         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1468
1469         if (udc_info && udc_info->udc_command) {
1470                 if (is_on)
1471                         s3c2410_udc_enable(udc);
1472                 else {
1473                         if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
1474                                 if (udc->driver && udc->driver->disconnect)
1475                                         udc->driver->disconnect(&udc->gadget);
1476
1477                         }
1478                         s3c2410_udc_disable(udc);
1479                 }
1480         }
1481         else
1482                 return -EOPNOTSUPP;
1483
1484         return 0;
1485 }
1486
1487 static int s3c2410_udc_vbus_session(struct usb_gadget *gadget, int is_active)
1488 {
1489         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1490
1491         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1492
1493         udc->vbus = (is_active != 0);
1494         s3c2410_udc_set_pullup(udc, is_active);
1495         return 0;
1496 }
1497
1498 static int s3c2410_udc_pullup(struct usb_gadget *gadget, int is_on)
1499 {
1500         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1501
1502         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1503
1504         s3c2410_udc_set_pullup(udc, is_on ? 0 : 1);
1505         return 0;
1506 }
1507
1508 static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev)
1509 {
1510         struct s3c2410_udc      *dev = _dev;
1511         unsigned int            value;
1512
1513         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1514
1515         /* some cpus cannot read from an line configured to IRQ! */
1516         s3c2410_gpio_cfgpin(udc_info->vbus_pin, S3C2410_GPIO_INPUT);
1517         value = s3c2410_gpio_getpin(udc_info->vbus_pin);
1518         s3c2410_gpio_cfgpin(udc_info->vbus_pin, S3C2410_GPIO_SFN2);
1519
1520         if (udc_info->vbus_pin_inverted)
1521                 value = !value;
1522
1523         if (value != dev->vbus)
1524                 s3c2410_udc_vbus_session(&dev->gadget, value);
1525
1526         return IRQ_HANDLED;
1527 }
1528
1529 static int s3c2410_vbus_draw(struct usb_gadget *_gadget, unsigned ma)
1530 {
1531         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1532
1533         if (udc_info && udc_info->vbus_draw) {
1534                 udc_info->vbus_draw(ma);
1535                 return 0;
1536         }
1537
1538         return -ENOTSUPP;
1539 }
1540
1541 static const struct usb_gadget_ops s3c2410_ops = {
1542         .get_frame              = s3c2410_udc_get_frame,
1543         .wakeup                 = s3c2410_udc_wakeup,
1544         .set_selfpowered        = s3c2410_udc_set_selfpowered,
1545         .pullup                 = s3c2410_udc_pullup,
1546         .vbus_session           = s3c2410_udc_vbus_session,
1547         .vbus_draw              = s3c2410_vbus_draw,
1548 };
1549
1550 /*------------------------- gadget driver handling---------------------------*/
1551 /*
1552  * s3c2410_udc_disable
1553  */
1554 static void s3c2410_udc_disable(struct s3c2410_udc *dev)
1555 {
1556         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1557
1558         /* Disable all interrupts */
1559         udc_write(0x00, S3C2410_UDC_USB_INT_EN_REG);
1560         udc_write(0x00, S3C2410_UDC_EP_INT_EN_REG);
1561
1562         /* Clear the interrupt registers */
1563         udc_write(S3C2410_UDC_USBINT_RESET
1564                                 | S3C2410_UDC_USBINT_RESUME
1565                                 | S3C2410_UDC_USBINT_SUSPEND,
1566                         S3C2410_UDC_USB_INT_REG);
1567
1568         udc_write(0x1F, S3C2410_UDC_EP_INT_REG);
1569
1570         /* Good bye, cruel world */
1571         if (udc_info && udc_info->udc_command)
1572                 udc_info->udc_command(S3C2410_UDC_P_DISABLE);
1573
1574         /* Set speed to unknown */
1575         dev->gadget.speed = USB_SPEED_UNKNOWN;
1576 }
1577
1578 /*
1579  * s3c2410_udc_reinit
1580  */
1581 static void s3c2410_udc_reinit(struct s3c2410_udc *dev)
1582 {
1583         u32 i;
1584
1585         /* device/ep0 records init */
1586         INIT_LIST_HEAD (&dev->gadget.ep_list);
1587         INIT_LIST_HEAD (&dev->gadget.ep0->ep_list);
1588         dev->ep0state = EP0_IDLE;
1589
1590         for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1591                 struct s3c2410_ep *ep = &dev->ep[i];
1592
1593                 if (i != 0)
1594                         list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
1595
1596                 ep->dev = dev;
1597                 ep->desc = NULL;
1598                 ep->halted = 0;
1599                 INIT_LIST_HEAD (&ep->queue);
1600         }
1601 }
1602
1603 /*
1604  * s3c2410_udc_enable
1605  */
1606 static void s3c2410_udc_enable(struct s3c2410_udc *dev)
1607 {
1608         int i;
1609
1610         dprintk(DEBUG_NORMAL, "s3c2410_udc_enable called\n");
1611
1612         /* dev->gadget.speed = USB_SPEED_UNKNOWN; */
1613         dev->gadget.speed = USB_SPEED_FULL;
1614
1615         /* Set MAXP for all endpoints */
1616         for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1617                 udc_write(i, S3C2410_UDC_INDEX_REG);
1618                 udc_write((dev->ep[i].ep.maxpacket & 0x7ff) >> 3,
1619                                 S3C2410_UDC_MAXP_REG);
1620         }
1621
1622         /* Set default power state */
1623         udc_write(DEFAULT_POWER_STATE, S3C2410_UDC_PWR_REG);
1624
1625         /* Enable reset and suspend interrupt interrupts */
1626         udc_write(S3C2410_UDC_USBINT_RESET | S3C2410_UDC_USBINT_SUSPEND,
1627                         S3C2410_UDC_USB_INT_EN_REG);
1628
1629         /* Enable ep0 interrupt */
1630         udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_EN_REG);
1631
1632         /* time to say "hello, world" */
1633         if (udc_info && udc_info->udc_command)
1634                 udc_info->udc_command(S3C2410_UDC_P_ENABLE);
1635 }
1636
1637 /*
1638  *      usb_gadget_register_driver
1639  */
1640 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
1641 {
1642         struct s3c2410_udc *udc = the_controller;
1643         int             retval;
1644
1645         dprintk(DEBUG_NORMAL, "usb_gadget_register_driver() '%s'\n",
1646                 driver->driver.name);
1647
1648         /* Sanity checks */
1649         if (!udc)
1650                 return -ENODEV;
1651
1652         if (udc->driver)
1653                 return -EBUSY;
1654
1655         if (!driver->bind || !driver->setup
1656                         || driver->speed != USB_SPEED_FULL) {
1657                 printk(KERN_ERR "Invalid driver: bind %p setup %p speed %d\n",
1658                         driver->bind, driver->setup, driver->speed);
1659                 return -EINVAL;
1660         }
1661 #if defined(MODULE)
1662         if (!driver->unbind) {
1663                 printk(KERN_ERR "Invalid driver: no unbind method\n");
1664                 return -EINVAL;
1665         }
1666 #endif
1667
1668         /* Hook the driver */
1669         udc->driver = driver;
1670         udc->gadget.dev.driver = &driver->driver;
1671
1672         /* Bind the driver */
1673         if ((retval = device_add(&udc->gadget.dev)) != 0) {
1674                 printk(KERN_ERR "Error in device_add() : %d\n",retval);
1675                 goto register_error;
1676         }
1677
1678         dprintk(DEBUG_NORMAL, "binding gadget driver '%s'\n",
1679                 driver->driver.name);
1680
1681         if ((retval = driver->bind (&udc->gadget)) != 0) {
1682                 device_del(&udc->gadget.dev);
1683                 goto register_error;
1684         }
1685
1686         /* Enable udc */
1687         s3c2410_udc_enable(udc);
1688
1689         return 0;
1690
1691 register_error:
1692         udc->driver = NULL;
1693         udc->gadget.dev.driver = NULL;
1694         return retval;
1695 }
1696
1697 /*
1698  *      usb_gadget_unregister_driver
1699  */
1700 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1701 {
1702         struct s3c2410_udc *udc = the_controller;
1703
1704         if (!udc)
1705                 return -ENODEV;
1706
1707         if (!driver || driver != udc->driver || !driver->unbind)
1708                 return -EINVAL;
1709
1710         dprintk(DEBUG_NORMAL,"usb_gadget_register_driver() '%s'\n",
1711                 driver->driver.name);
1712
1713         if (driver->disconnect)
1714                 driver->disconnect(&udc->gadget);
1715
1716         device_del(&udc->gadget.dev);
1717         udc->driver = NULL;
1718
1719         /* Disable udc */
1720         s3c2410_udc_disable(udc);
1721
1722         return 0;
1723 }
1724
1725 /*---------------------------------------------------------------------------*/
1726 static struct s3c2410_udc memory = {
1727         .gadget = {
1728                 .ops            = &s3c2410_ops,
1729                 .ep0            = &memory.ep[0].ep,
1730                 .name           = gadget_name,
1731                 .dev = {
1732                         .bus_id         = "gadget",
1733                 },
1734         },
1735
1736         /* control endpoint */
1737         .ep[0] = {
1738                 .num            = 0,
1739                 .ep = {
1740                         .name           = ep0name,
1741                         .ops            = &s3c2410_ep_ops,
1742                         .maxpacket      = EP0_FIFO_SIZE,
1743                 },
1744                 .dev            = &memory,
1745         },
1746
1747         /* first group of endpoints */
1748         .ep[1] = {
1749                 .num            = 1,
1750                 .ep = {
1751                         .name           = "ep1-bulk",
1752                         .ops            = &s3c2410_ep_ops,
1753                         .maxpacket      = EP_FIFO_SIZE,
1754                 },
1755                 .dev            = &memory,
1756                 .fifo_size      = EP_FIFO_SIZE,
1757                 .bEndpointAddress = 1,
1758                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1759         },
1760         .ep[2] = {
1761                 .num            = 2,
1762                 .ep = {
1763                         .name           = "ep2-bulk",
1764                         .ops            = &s3c2410_ep_ops,
1765                         .maxpacket      = EP_FIFO_SIZE,
1766                 },
1767                 .dev            = &memory,
1768                 .fifo_size      = EP_FIFO_SIZE,
1769                 .bEndpointAddress = 2,
1770                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1771         },
1772         .ep[3] = {
1773                 .num            = 3,
1774                 .ep = {
1775                         .name           = "ep3-bulk",
1776                         .ops            = &s3c2410_ep_ops,
1777                         .maxpacket      = EP_FIFO_SIZE,
1778                 },
1779                 .dev            = &memory,
1780                 .fifo_size      = EP_FIFO_SIZE,
1781                 .bEndpointAddress = 3,
1782                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1783         },
1784         .ep[4] = {
1785                 .num            = 4,
1786                 .ep = {
1787                         .name           = "ep4-bulk",
1788                         .ops            = &s3c2410_ep_ops,
1789                         .maxpacket      = EP_FIFO_SIZE,
1790                 },
1791                 .dev            = &memory,
1792                 .fifo_size      = EP_FIFO_SIZE,
1793                 .bEndpointAddress = 4,
1794                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1795         }
1796
1797 };
1798
1799 /*
1800  *      probe - binds to the platform device
1801  */
1802 static int s3c2410_udc_probe(struct platform_device *pdev)
1803 {
1804         struct s3c2410_udc *udc = &memory;
1805         struct device *dev = &pdev->dev;
1806         int retval;
1807         unsigned int irq;
1808
1809         dev_dbg(dev, "%s()\n", __func__);
1810
1811         usb_bus_clock = clk_get(NULL, "usb-bus-gadget");
1812         if (IS_ERR(usb_bus_clock)) {
1813                 dev_err(dev, "failed to get usb bus clock source\n");
1814                 return PTR_ERR(usb_bus_clock);
1815         }
1816
1817         clk_enable(usb_bus_clock);
1818
1819         udc_clock = clk_get(NULL, "usb-device");
1820         if (IS_ERR(udc_clock)) {
1821                 dev_err(dev, "failed to get udc clock source\n");
1822                 return PTR_ERR(udc_clock);
1823         }
1824
1825         clk_enable(udc_clock);
1826
1827         mdelay(10);
1828
1829         dev_dbg(dev, "got and enabled clocks\n");
1830
1831         if (strncmp(pdev->name, "s3c2440", 7) == 0) {
1832                 dev_info(dev, "S3C2440: increasing FIFO to 128 bytes\n");
1833                 memory.ep[1].fifo_size = S3C2440_EP_FIFO_SIZE;
1834                 memory.ep[2].fifo_size = S3C2440_EP_FIFO_SIZE;
1835                 memory.ep[3].fifo_size = S3C2440_EP_FIFO_SIZE;
1836                 memory.ep[4].fifo_size = S3C2440_EP_FIFO_SIZE;
1837         }
1838
1839         spin_lock_init (&udc->lock);
1840         udc_info = pdev->dev.platform_data;
1841
1842         rsrc_start = S3C2410_PA_USBDEV;
1843         rsrc_len   = S3C24XX_SZ_USBDEV;
1844
1845         if (!request_mem_region(rsrc_start, rsrc_len, gadget_name))
1846                 return -EBUSY;
1847
1848         base_addr = ioremap(rsrc_start, rsrc_len);
1849         if (!base_addr) {
1850                 retval = -ENOMEM;
1851                 goto err_mem;
1852         }
1853
1854         device_initialize(&udc->gadget.dev);
1855         udc->gadget.dev.parent = &pdev->dev;
1856         udc->gadget.dev.dma_mask = pdev->dev.dma_mask;
1857
1858         the_controller = udc;
1859         platform_set_drvdata(pdev, udc);
1860
1861         s3c2410_udc_disable(udc);
1862         s3c2410_udc_reinit(udc);
1863
1864         /* irq setup after old hardware state is cleaned up */
1865         retval = request_irq(IRQ_USBD, s3c2410_udc_irq,
1866                         IRQF_DISABLED, gadget_name, udc);
1867
1868         if (retval != 0) {
1869                 dev_err(dev, "cannot get irq %i, err %d\n", IRQ_USBD, retval);
1870                 retval = -EBUSY;
1871                 goto err_map;
1872         }
1873
1874         dev_dbg(dev, "got irq %i\n", IRQ_USBD);
1875
1876         if (udc_info && udc_info->vbus_pin > 0) {
1877                 irq = s3c2410_gpio_getirq(udc_info->vbus_pin);
1878                 retval = request_irq(irq, s3c2410_udc_vbus_irq,
1879                                      IRQF_DISABLED | IRQF_TRIGGER_RISING
1880                                      | IRQF_TRIGGER_FALLING | IRQF_SHARED,
1881                                      gadget_name, udc);
1882
1883                 if (retval != 0) {
1884                         dev_err(dev, "can't get vbus irq %i, err %d\n",
1885                                 irq, retval);
1886                         retval = -EBUSY;
1887                         goto err_int;
1888                 }
1889
1890                 dev_dbg(dev, "got irq %i\n", irq);
1891         } else {
1892                 udc->vbus = 1;
1893         }
1894
1895         if (s3c2410_udc_debugfs_root) {
1896                 udc->regs_info = debugfs_create_file("registers", S_IRUGO,
1897                                 s3c2410_udc_debugfs_root,
1898                                 udc, &s3c2410_udc_debugfs_fops);
1899                 if (IS_ERR(udc->regs_info)) {
1900                         dev_warn(dev, "debugfs file creation failed %ld\n",
1901                                  PTR_ERR(udc->regs_info));
1902                         udc->regs_info = NULL;
1903                 }
1904         }
1905
1906         dev_dbg(dev, "probe ok\n");
1907
1908         return 0;
1909
1910 err_int:
1911         free_irq(IRQ_USBD, udc);
1912 err_map:
1913         iounmap(base_addr);
1914 err_mem:
1915         release_mem_region(rsrc_start, rsrc_len);
1916
1917         return retval;
1918 }
1919
1920 /*
1921  *      s3c2410_udc_remove
1922  */
1923 static int s3c2410_udc_remove(struct platform_device *pdev)
1924 {
1925         struct s3c2410_udc *udc = platform_get_drvdata(pdev);
1926         unsigned int irq;
1927
1928         dev_dbg(&pdev->dev, "%s()\n", __func__);
1929         if (udc->driver)
1930                 return -EBUSY;
1931
1932         debugfs_remove(udc->regs_info);
1933
1934         if (udc_info && udc_info->vbus_pin > 0) {
1935                 irq = s3c2410_gpio_getirq(udc_info->vbus_pin);
1936                 free_irq(irq, udc);
1937         }
1938
1939         free_irq(IRQ_USBD, udc);
1940
1941         iounmap(base_addr);
1942         release_mem_region(rsrc_start, rsrc_len);
1943
1944         platform_set_drvdata(pdev, NULL);
1945
1946         if (!IS_ERR(udc_clock) && udc_clock != NULL) {
1947                 clk_disable(udc_clock);
1948                 clk_put(udc_clock);
1949                 udc_clock = NULL;
1950         }
1951
1952         if (!IS_ERR(usb_bus_clock) && usb_bus_clock != NULL) {
1953                 clk_disable(usb_bus_clock);
1954                 clk_put(usb_bus_clock);
1955                 usb_bus_clock = NULL;
1956         }
1957
1958         dev_dbg(&pdev->dev, "%s: remove ok\n", __func__);
1959         return 0;
1960 }
1961
1962 #ifdef CONFIG_PM
1963 static int s3c2410_udc_suspend(struct platform_device *pdev, pm_message_t message)
1964 {
1965         if (udc_info && udc_info->udc_command)
1966                 udc_info->udc_command(S3C2410_UDC_P_DISABLE);
1967
1968         return 0;
1969 }
1970
1971 static int s3c2410_udc_resume(struct platform_device *pdev)
1972 {
1973         if (udc_info && udc_info->udc_command)
1974                 udc_info->udc_command(S3C2410_UDC_P_ENABLE);
1975
1976         return 0;
1977 }
1978 #else
1979 #define s3c2410_udc_suspend     NULL
1980 #define s3c2410_udc_resume      NULL
1981 #endif
1982
1983 static struct platform_driver udc_driver_2410 = {
1984         .driver         = {
1985                 .name   = "s3c2410-usbgadget",
1986                 .owner  = THIS_MODULE,
1987         },
1988         .probe          = s3c2410_udc_probe,
1989         .remove         = s3c2410_udc_remove,
1990         .suspend        = s3c2410_udc_suspend,
1991         .resume         = s3c2410_udc_resume,
1992 };
1993
1994 static struct platform_driver udc_driver_2440 = {
1995         .driver         = {
1996                 .name   = "s3c2440-usbgadget",
1997                 .owner  = THIS_MODULE,
1998         },
1999         .probe          = s3c2410_udc_probe,
2000         .remove         = s3c2410_udc_remove,
2001         .suspend        = s3c2410_udc_suspend,
2002         .resume         = s3c2410_udc_resume,
2003 };
2004
2005 static int __init udc_init(void)
2006 {
2007         int retval;
2008
2009         dprintk(DEBUG_NORMAL, "%s: version %s\n", gadget_name, DRIVER_VERSION);
2010
2011         s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name, NULL);
2012         if (IS_ERR(s3c2410_udc_debugfs_root)) {
2013                 printk(KERN_ERR "%s: debugfs dir creation failed %ld\n",
2014                         gadget_name, PTR_ERR(s3c2410_udc_debugfs_root));
2015                 s3c2410_udc_debugfs_root = NULL;
2016         }
2017
2018         retval = platform_driver_register(&udc_driver_2410);
2019         if (retval)
2020                 goto err;
2021
2022         retval = platform_driver_register(&udc_driver_2440);
2023         if (retval)
2024                 goto err;
2025
2026         return 0;
2027
2028 err:
2029         debugfs_remove(s3c2410_udc_debugfs_root);
2030         return retval;
2031 }
2032
2033 static void __exit udc_exit(void)
2034 {
2035         platform_driver_unregister(&udc_driver_2410);
2036         platform_driver_unregister(&udc_driver_2440);
2037         debugfs_remove(s3c2410_udc_debugfs_root);
2038 }
2039
2040 EXPORT_SYMBOL(usb_gadget_unregister_driver);
2041 EXPORT_SYMBOL(usb_gadget_register_driver);
2042
2043 module_init(udc_init);
2044 module_exit(udc_exit);
2045
2046 MODULE_AUTHOR(DRIVER_AUTHOR);
2047 MODULE_DESCRIPTION(DRIVER_DESC);
2048 MODULE_VERSION(DRIVER_VERSION);
2049 MODULE_LICENSE("GPL");