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/errno.h>
  32 #include <linux/init.h>
  33 #include <linux/timer.h>
  34 #include <linux/list.h>
  35 #include <linux/interrupt.h>
  36 #include <linux/platform_device.h>
  37 #include <linux/clk.h>
  38 #include <linux/gpio.h>
  39 #include <linux/prefetch.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 <mach/irqs.h>
  53
  54 #include <mach/hardware.h>
  55
  56 #include <plat/regs-udc.h>
  57 #include <plat/udc.h>
  58
  59
  60 #include "s3c2410_udc.h"
  61
  62 #define DRIVER_DESC     "S3C2410 USB Device Controller Gadget"
  63 #define DRIVER_VERSION  "29 Apr 2007"
  64 #define DRIVER_AUTHOR   "Herbert Pötzl <herbert@13thfloor.at>, " \
  65                         "Arnaud Patard <arnaud.patard@rtp-net.org>"
  66
  67 static const char               gadget_name[] = "s3c2410_udc";
  68 static const char               driver_desc[] = DRIVER_DESC;
  69
  70 static struct s3c2410_udc       *the_controller;
  71 static struct clk               *udc_clock;
  72 static struct clk               *usb_bus_clock;
  73 static void __iomem             *base_addr;
  74 static u64                      rsrc_start;
  75 static u64                      rsrc_len;
  76 static struct dentry            *s3c2410_udc_debugfs_root;
  77
  78 static inline u32 udc_read(u32 reg)
  79 {
  80         return readb(base_addr + reg);
  81 }
  82
  83 static inline void udc_write(u32 value, u32 reg)
  84 {
  85         writeb(value, base_addr + reg);
  86 }
  87
  88 static inline void udc_writeb(void __iomem *base, u32 value, u32 reg)
  89 {
  90         writeb(value, base + reg);
  91 }
  92
  93 static struct s3c2410_udc_mach_info *udc_info;
  94
  95 /*************************** DEBUG FUNCTION ***************************/
  96 #define DEBUG_NORMAL    1
  97 #define DEBUG_VERBOSE   2
  98
  99 #ifdef CONFIG_USB_S3C2410_DEBUG
 100 #define USB_S3C2410_DEBUG_LEVEL 0
 101
 102 static uint32_t s3c2410_ticks = 0;
 103
 104 static int dprintk(int level, const char *fmt, ...)
 105 {
 106         static char printk_buf[1024];
 107         static long prevticks;
 108         static int invocation;
 109         va_list args;
 110         int len;
 111
 112         if (level > USB_S3C2410_DEBUG_LEVEL)
 113                 return 0;
 114
 115         if (s3c2410_ticks != prevticks) {
 116                 prevticks = s3c2410_ticks;
 117                 invocation = 0;
 118         }
 119
 120         len = scnprintf(printk_buf,
 121                         sizeof(printk_buf), "%1lu.%02d USB: ",
 122                         prevticks, invocation++);
 123
 124         va_start(args, fmt);
 125         len = vscnprintf(printk_buf+len,
 126                         sizeof(printk_buf)-len, fmt, args);
 127         va_end(args);
 128
 129         return printk(KERN_DEBUG "%s", printk_buf);
 130 }
 131 #else
 132 static int dprintk(int level, const char *fmt, ...)
 133 {
 134         return 0;
 135 }
 136 #endif
 137 static int s3c2410_udc_debugfs_seq_show(struct seq_file *m, void *p)
 138 {
 139         u32 addr_reg,pwr_reg,ep_int_reg,usb_int_reg;
 140         u32 ep_int_en_reg, usb_int_en_reg, ep0_csr;
 141         u32 ep1_i_csr1,ep1_i_csr2,ep1_o_csr1,ep1_o_csr2;
 142         u32 ep2_i_csr1,ep2_i_csr2,ep2_o_csr1,ep2_o_csr2;
 143
 144         addr_reg       = udc_read(S3C2410_UDC_FUNC_ADDR_REG);
 145         pwr_reg        = udc_read(S3C2410_UDC_PWR_REG);
 146         ep_int_reg     = udc_read(S3C2410_UDC_EP_INT_REG);
 147         usb_int_reg    = udc_read(S3C2410_UDC_USB_INT_REG);
 148         ep_int_en_reg  = udc_read(S3C2410_UDC_EP_INT_EN_REG);
 149         usb_int_en_reg = udc_read(S3C2410_UDC_USB_INT_EN_REG);
 150         udc_write(0, S3C2410_UDC_INDEX_REG);
 151         ep0_csr        = udc_read(S3C2410_UDC_IN_CSR1_REG);
 152         udc_write(1, S3C2410_UDC_INDEX_REG);
 153         ep1_i_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 154         ep1_i_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 155         ep1_o_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 156         ep1_o_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 157         udc_write(2, S3C2410_UDC_INDEX_REG);
 158         ep2_i_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 159         ep2_i_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 160         ep2_o_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 161         ep2_o_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 162
 163         seq_printf(m, "FUNC_ADDR_REG  : 0x%04X\n"
 164                  "PWR_REG        : 0x%04X\n"
 165                  "EP_INT_REG     : 0x%04X\n"
 166                  "USB_INT_REG    : 0x%04X\n"
 167                  "EP_INT_EN_REG  : 0x%04X\n"
 168                  "USB_INT_EN_REG : 0x%04X\n"
 169                  "EP0_CSR        : 0x%04X\n"
 170                  "EP1_I_CSR1     : 0x%04X\n"
 171                  "EP1_I_CSR2     : 0x%04X\n"
 172                  "EP1_O_CSR1     : 0x%04X\n"
 173                  "EP1_O_CSR2     : 0x%04X\n"
 174                  "EP2_I_CSR1     : 0x%04X\n"
 175                  "EP2_I_CSR2     : 0x%04X\n"
 176                  "EP2_O_CSR1     : 0x%04X\n"
 177                  "EP2_O_CSR2     : 0x%04X\n",
 178                         addr_reg,pwr_reg,ep_int_reg,usb_int_reg,
 179                         ep_int_en_reg, usb_int_en_reg, ep0_csr,
 180                         ep1_i_csr1,ep1_i_csr2,ep1_o_csr1,ep1_o_csr2,
 181                         ep2_i_csr1,ep2_i_csr2,ep2_o_csr1,ep2_o_csr2
 182                 );
 183
 184         return 0;
 185 }
 186
 187 static int s3c2410_udc_debugfs_fops_open(struct inode *inode,
 188                                          struct file *file)
 189 {
 190         return single_open(file, s3c2410_udc_debugfs_seq_show, NULL);
 191 }
 192
 193 static const struct file_operations s3c2410_udc_debugfs_fops = {
 194         .open           = s3c2410_udc_debugfs_fops_open,
 195         .read           = seq_read,
 196         .llseek         = seq_lseek,
 197         .release        = single_release,
 198         .owner          = THIS_MODULE,
 199 };
 200
 201 /* io macros */
 202
 203 static inline void s3c2410_udc_clear_ep0_opr(void __iomem *base)
 204 {
 205         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 206         udc_writeb(base, S3C2410_UDC_EP0_CSR_SOPKTRDY,
 207                         S3C2410_UDC_EP0_CSR_REG);
 208 }
 209
 210 static inline void s3c2410_udc_clear_ep0_sst(void __iomem *base)
 211 {
 212         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 213         writeb(0x00, base + S3C2410_UDC_EP0_CSR_REG);
 214 }
 215
 216 static inline void s3c2410_udc_clear_ep0_se(void __iomem *base)
 217 {
 218         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 219         udc_writeb(base, S3C2410_UDC_EP0_CSR_SSE, S3C2410_UDC_EP0_CSR_REG);
 220 }
 221
 222 static inline void s3c2410_udc_set_ep0_ipr(void __iomem *base)
 223 {
 224         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 225         udc_writeb(base, S3C2410_UDC_EP0_CSR_IPKRDY, S3C2410_UDC_EP0_CSR_REG);
 226 }
 227
 228 static inline void s3c2410_udc_set_ep0_de(void __iomem *base)
 229 {
 230         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 231         udc_writeb(base, S3C2410_UDC_EP0_CSR_DE, S3C2410_UDC_EP0_CSR_REG);
 232 }
 233
 234 inline void s3c2410_udc_set_ep0_ss(void __iomem *b)
 235 {
 236         udc_writeb(b, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 237         udc_writeb(b, S3C2410_UDC_EP0_CSR_SENDSTL, S3C2410_UDC_EP0_CSR_REG);
 238 }
 239
 240 static inline void s3c2410_udc_set_ep0_de_out(void __iomem *base)
 241 {
 242         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 243
 244         udc_writeb(base,(S3C2410_UDC_EP0_CSR_SOPKTRDY
 245                                 | S3C2410_UDC_EP0_CSR_DE),
 246                         S3C2410_UDC_EP0_CSR_REG);
 247 }
 248
 249 static inline void s3c2410_udc_set_ep0_sse_out(void __iomem *base)
 250 {
 251         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 252         udc_writeb(base, (S3C2410_UDC_EP0_CSR_SOPKTRDY
 253                                 | S3C2410_UDC_EP0_CSR_SSE),
 254                         S3C2410_UDC_EP0_CSR_REG);
 255 }
 256
 257 static inline void s3c2410_udc_set_ep0_de_in(void __iomem *base)
 258 {
 259         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 260         udc_writeb(base, (S3C2410_UDC_EP0_CSR_IPKRDY
 261                         | S3C2410_UDC_EP0_CSR_DE),
 262                 S3C2410_UDC_EP0_CSR_REG);
 263 }
 264
 265 /*------------------------- I/O ----------------------------------*/
 266
 267 /*
 268  *      s3c2410_udc_done
 269  */
 270 static void s3c2410_udc_done(struct s3c2410_ep *ep,
 271                 struct s3c2410_request *req, int status)
 272 {
 273         unsigned halted = ep->halted;
 274
 275         list_del_init(&req->queue);
 276
 277         if (likely (req->req.status == -EINPROGRESS))
 278                 req->req.status = status;
 279         else
 280                 status = req->req.status;
 281
 282         ep->halted = 1;
 283         req->req.complete(&ep->ep, &req->req);
 284         ep->halted = halted;
 285 }
 286
 287 static void s3c2410_udc_nuke(struct s3c2410_udc *udc,
 288                 struct s3c2410_ep *ep, int status)
 289 {
 290         /* Sanity check */
 291         if (&ep->queue == NULL)
 292                 return;
 293
 294         while (!list_empty (&ep->queue)) {
 295                 struct s3c2410_request *req;
 296                 req = list_entry (ep->queue.next, struct s3c2410_request,
 297                                 queue);
 298                 s3c2410_udc_done(ep, req, status);
 299         }
 300 }
 301
 302 static inline void s3c2410_udc_clear_ep_state(struct s3c2410_udc *dev)
 303 {
 304         unsigned i;
 305
 306         /* hardware SET_{CONFIGURATION,INTERFACE} automagic resets endpoint
 307          * fifos, and pending transactions mustn't be continued in any case.
 308          */
 309
 310         for (i = 1; i < S3C2410_ENDPOINTS; i++)
 311                 s3c2410_udc_nuke(dev, &dev->ep[i], -ECONNABORTED);
 312 }
 313
 314 static inline int s3c2410_udc_fifo_count_out(void)
 315 {
 316         int tmp;
 317
 318         tmp = udc_read(S3C2410_UDC_OUT_FIFO_CNT2_REG) << 8;
 319         tmp |= udc_read(S3C2410_UDC_OUT_FIFO_CNT1_REG);
 320         return tmp;
 321 }
 322
 323 /*
 324  *      s3c2410_udc_write_packet
 325  */
 326 static inline int s3c2410_udc_write_packet(int fifo,
 327                 struct s3c2410_request *req,
 328                 unsigned max)
 329 {
 330         unsigned len = min(req->req.length - req->req.actual, max);
 331         u8 *buf = req->req.buf + req->req.actual;
 332
 333         prefetch(buf);
 334
 335         dprintk(DEBUG_VERBOSE, "%s %d %d %d %d\n", __func__,
 336                 req->req.actual, req->req.length, len, req->req.actual + len);
 337
 338         req->req.actual += len;
 339
 340         udelay(5);
 341         writesb(base_addr + fifo, buf, len);
 342         return len;
 343 }
 344
 345 /*
 346  *      s3c2410_udc_write_fifo
 347  *
 348  * return:  0 = still running, 1 = completed, negative = errno
 349  */
 350 static int s3c2410_udc_write_fifo(struct s3c2410_ep *ep,
 351                 struct s3c2410_request *req)
 352 {
 353         unsigned        count;
 354         int             is_last;
 355         u32             idx;
 356         int             fifo_reg;
 357         u32             ep_csr;
 358
 359         idx = ep->bEndpointAddress & 0x7F;
 360         switch (idx) {
 361         default:
 362                 idx = 0;
 363         case 0:
 364                 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
 365                 break;
 366         case 1:
 367                 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
 368                 break;
 369         case 2:
 370                 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
 371                 break;
 372         case 3:
 373                 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
 374                 break;
 375         case 4:
 376                 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
 377                 break;
 378         }
 379
 380         count = s3c2410_udc_write_packet(fifo_reg, req, ep->ep.maxpacket);
 381
 382         /* last packet is often short (sometimes a zlp) */
 383         if (count != ep->ep.maxpacket)
 384                 is_last = 1;
 385         else if (req->req.length != req->req.actual || req->req.zero)
 386                 is_last = 0;
 387         else
 388                 is_last = 2;
 389
 390         /* Only ep0 debug messages are interesting */
 391         if (idx == 0)
 392                 dprintk(DEBUG_NORMAL,
 393                         "Written ep%d %d.%d of %d b [last %d,z %d]\n",
 394                         idx, count, req->req.actual, req->req.length,
 395                         is_last, req->req.zero);
 396
 397         if (is_last) {
 398                 /* The order is important. It prevents sending 2 packets
 399                  * at the same time */
 400
 401                 if (idx == 0) {
 402                         /* Reset signal => no need to say 'data sent' */
 403                         if (! (udc_read(S3C2410_UDC_USB_INT_REG)
 404                                         & S3C2410_UDC_USBINT_RESET))
 405                                 s3c2410_udc_set_ep0_de_in(base_addr);
 406                         ep->dev->ep0state=EP0_IDLE;
 407                 } else {
 408                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 409                         ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 410                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 411                         udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
 412                                         S3C2410_UDC_IN_CSR1_REG);
 413                 }
 414
 415                 s3c2410_udc_done(ep, req, 0);
 416                 is_last = 1;
 417         } else {
 418                 if (idx == 0) {
 419                         /* Reset signal => no need to say 'data sent' */
 420                         if (! (udc_read(S3C2410_UDC_USB_INT_REG)
 421                                         & S3C2410_UDC_USBINT_RESET))
 422                                 s3c2410_udc_set_ep0_ipr(base_addr);
 423                 } else {
 424                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 425                         ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 426                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 427                         udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
 428                                         S3C2410_UDC_IN_CSR1_REG);
 429                 }
 430         }
 431
 432         return is_last;
 433 }
 434
 435 static inline int s3c2410_udc_read_packet(int fifo, u8 *buf,
 436                 struct s3c2410_request *req, unsigned avail)
 437 {
 438         unsigned len;
 439
 440         len = min(req->req.length - req->req.actual, avail);
 441         req->req.actual += len;
 442
 443         readsb(fifo + base_addr, buf, len);
 444         return len;
 445 }
 446
 447 /*
 448  * return:  0 = still running, 1 = queue empty, negative = errno
 449  */
 450 static int s3c2410_udc_read_fifo(struct s3c2410_ep *ep,
 451                                  struct s3c2410_request *req)
 452 {
 453         u8              *buf;
 454         u32             ep_csr;
 455         unsigned        bufferspace;
 456         int             is_last=1;
 457         unsigned        avail;
 458         int             fifo_count = 0;
 459         u32             idx;
 460         int             fifo_reg;
 461
 462         idx = ep->bEndpointAddress & 0x7F;
 463
 464         switch (idx) {
 465         default:
 466                 idx = 0;
 467         case 0:
 468                 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
 469                 break;
 470         case 1:
 471                 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
 472                 break;
 473         case 2:
 474                 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
 475                 break;
 476         case 3:
 477                 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
 478                 break;
 479         case 4:
 480                 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
 481                 break;
 482         }
 483
 484         if (!req->req.length)
 485                 return 1;
 486
 487         buf = req->req.buf + req->req.actual;
 488         bufferspace = req->req.length - req->req.actual;
 489         if (!bufferspace) {
 490                 dprintk(DEBUG_NORMAL, "%s: buffer full!\n", __func__);
 491                 return -1;
 492         }
 493
 494         udc_write(idx, S3C2410_UDC_INDEX_REG);
 495
 496         fifo_count = s3c2410_udc_fifo_count_out();
 497         dprintk(DEBUG_NORMAL, "%s fifo count : %d\n", __func__, fifo_count);
 498
 499         if (fifo_count > ep->ep.maxpacket)
 500                 avail = ep->ep.maxpacket;
 501         else
 502                 avail = fifo_count;
 503
 504         fifo_count = s3c2410_udc_read_packet(fifo_reg, buf, req, avail);
 505
 506         /* checking this with ep0 is not accurate as we already
 507          * read a control request
 508          **/
 509         if (idx != 0 && fifo_count < ep->ep.maxpacket) {
 510                 is_last = 1;
 511                 /* overflowed this request?  flush extra data */
 512                 if (fifo_count != avail)
 513                         req->req.status = -EOVERFLOW;
 514         } else {
 515                 is_last = (req->req.length <= req->req.actual) ? 1 : 0;
 516         }
 517
 518         udc_write(idx, S3C2410_UDC_INDEX_REG);
 519         fifo_count = s3c2410_udc_fifo_count_out();
 520
 521         /* Only ep0 debug messages are interesting */
 522         if (idx == 0)
 523                 dprintk(DEBUG_VERBOSE, "%s fifo count : %d [last %d]\n",
 524                         __func__, fifo_count,is_last);
 525
 526         if (is_last) {
 527                 if (idx == 0) {
 528                         s3c2410_udc_set_ep0_de_out(base_addr);
 529                         ep->dev->ep0state = EP0_IDLE;
 530                 } else {
 531                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 532                         ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 533                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 534                         udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
 535                                         S3C2410_UDC_OUT_CSR1_REG);
 536                 }
 537
 538                 s3c2410_udc_done(ep, req, 0);
 539         } else {
 540                 if (idx == 0) {
 541                         s3c2410_udc_clear_ep0_opr(base_addr);
 542                 } else {
 543                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 544                         ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 545                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 546                         udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
 547                                         S3C2410_UDC_OUT_CSR1_REG);
 548                 }
 549         }
 550
 551         return is_last;
 552 }
 553
 554 static int s3c2410_udc_read_fifo_crq(struct usb_ctrlrequest *crq)
 555 {
 556         unsigned char *outbuf = (unsigned char*)crq;
 557         int bytes_read = 0;
 558
 559         udc_write(0, S3C2410_UDC_INDEX_REG);
 560
 561         bytes_read = s3c2410_udc_fifo_count_out();
 562
 563         dprintk(DEBUG_NORMAL, "%s: fifo_count=%d\n", __func__, bytes_read);
 564
 565         if (bytes_read > sizeof(struct usb_ctrlrequest))
 566                 bytes_read = sizeof(struct usb_ctrlrequest);
 567
 568         readsb(S3C2410_UDC_EP0_FIFO_REG + base_addr, outbuf, bytes_read);
 569
 570         dprintk(DEBUG_VERBOSE, "%s: len=%d %02x:%02x {%x,%x,%x}\n", __func__,
 571                 bytes_read, crq->bRequest, crq->bRequestType,
 572                 crq->wValue, crq->wIndex, crq->wLength);
 573
 574         return bytes_read;
 575 }
 576
 577 static int s3c2410_udc_get_status(struct s3c2410_udc *dev,
 578                 struct usb_ctrlrequest *crq)
 579 {
 580         u16 status = 0;
 581         u8 ep_num = crq->wIndex & 0x7F;
 582         u8 is_in = crq->wIndex & USB_DIR_IN;
 583
 584         switch (crq->bRequestType & USB_RECIP_MASK) {
 585         case USB_RECIP_INTERFACE:
 586                 break;
 587
 588         case USB_RECIP_DEVICE:
 589                 status = dev->devstatus;
 590                 break;
 591
 592         case USB_RECIP_ENDPOINT:
 593                 if (ep_num > 4 || crq->wLength > 2)
 594                         return 1;
 595
 596                 if (ep_num == 0) {
 597                         udc_write(0, S3C2410_UDC_INDEX_REG);
 598                         status = udc_read(S3C2410_UDC_IN_CSR1_REG);
 599                         status = status & S3C2410_UDC_EP0_CSR_SENDSTL;
 600                 } else {
 601                         udc_write(ep_num, S3C2410_UDC_INDEX_REG);
 602                         if (is_in) {
 603                                 status = udc_read(S3C2410_UDC_IN_CSR1_REG);
 604                                 status = status & S3C2410_UDC_ICSR1_SENDSTL;
 605                         } else {
 606                                 status = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 607                                 status = status & S3C2410_UDC_OCSR1_SENDSTL;
 608                         }
 609                 }
 610
 611                 status = status ? 1 : 0;
 612                 break;
 613
 614         default:
 615                 return 1;
 616         }
 617
 618         /* Seems to be needed to get it working. ouch :( */
 619         udelay(5);
 620         udc_write(status & 0xFF, S3C2410_UDC_EP0_FIFO_REG);
 621         udc_write(status >> 8, S3C2410_UDC_EP0_FIFO_REG);
 622         s3c2410_udc_set_ep0_de_in(base_addr);
 623
 624         return 0;
 625 }
 626 /*------------------------- usb state machine -------------------------------*/
 627 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value);
 628
 629 static void s3c2410_udc_handle_ep0_idle(struct s3c2410_udc *dev,
 630                                         struct s3c2410_ep *ep,
 631                                         struct usb_ctrlrequest *crq,
 632                                         u32 ep0csr)
 633 {
 634         int len, ret, tmp;
 635
 636         /* start control request? */
 637         if (!(ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY))
 638                 return;
 639
 640         s3c2410_udc_nuke(dev, ep, -EPROTO);
 641
 642         len = s3c2410_udc_read_fifo_crq(crq);
 643         if (len != sizeof(*crq)) {
 644                 dprintk(DEBUG_NORMAL, "setup begin: fifo READ ERROR"
 645                         " wanted %d bytes got %d. Stalling out...\n",
 646                         sizeof(*crq), len);
 647                 s3c2410_udc_set_ep0_ss(base_addr);
 648                 return;
 649         }
 650
 651         dprintk(DEBUG_NORMAL, "bRequest = %d bRequestType %d wLength = %d\n",
 652                 crq->bRequest, crq->bRequestType, crq->wLength);
 653
 654         /* cope with automagic for some standard requests. */
 655         dev->req_std = (crq->bRequestType & USB_TYPE_MASK)
 656                 == USB_TYPE_STANDARD;
 657         dev->req_config = 0;
 658         dev->req_pending = 1;
 659
 660         switch (crq->bRequest) {
 661         case USB_REQ_SET_CONFIGURATION:
 662                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_CONFIGURATION ... \n");
 663
 664                 if (crq->bRequestType == USB_RECIP_DEVICE) {
 665                         dev->req_config = 1;
 666                         s3c2410_udc_set_ep0_de_out(base_addr);
 667                 }
 668                 break;
 669
 670         case USB_REQ_SET_INTERFACE:
 671                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_INTERFACE ... \n");
 672
 673                 if (crq->bRequestType == USB_RECIP_INTERFACE) {
 674                         dev->req_config = 1;
 675                         s3c2410_udc_set_ep0_de_out(base_addr);
 676                 }
 677                 break;
 678
 679         case USB_REQ_SET_ADDRESS:
 680                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_ADDRESS ... \n");
 681
 682                 if (crq->bRequestType == USB_RECIP_DEVICE) {
 683                         tmp = crq->wValue & 0x7F;
 684                         dev->address = tmp;
 685                         udc_write((tmp | S3C2410_UDC_FUNCADDR_UPDATE),
 686                                         S3C2410_UDC_FUNC_ADDR_REG);
 687                         s3c2410_udc_set_ep0_de_out(base_addr);
 688                         return;
 689                 }
 690                 break;
 691
 692         case USB_REQ_GET_STATUS:
 693                 dprintk(DEBUG_NORMAL, "USB_REQ_GET_STATUS ... \n");
 694                 s3c2410_udc_clear_ep0_opr(base_addr);
 695
 696                 if (dev->req_std) {
 697                         if (!s3c2410_udc_get_status(dev, crq)) {
 698                                 return;
 699                         }
 700                 }
 701                 break;
 702
 703         case USB_REQ_CLEAR_FEATURE:
 704                 s3c2410_udc_clear_ep0_opr(base_addr);
 705
 706                 if (crq->bRequestType != USB_RECIP_ENDPOINT)
 707                         break;
 708
 709                 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
 710                         break;
 711
 712                 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 0);
 713                 s3c2410_udc_set_ep0_de_out(base_addr);
 714                 return;
 715
 716         case USB_REQ_SET_FEATURE:
 717                 s3c2410_udc_clear_ep0_opr(base_addr);
 718
 719                 if (crq->bRequestType != USB_RECIP_ENDPOINT)
 720                         break;
 721
 722                 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
 723                         break;
 724
 725                 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 1);
 726                 s3c2410_udc_set_ep0_de_out(base_addr);
 727                 return;
 728
 729         default:
 730                 s3c2410_udc_clear_ep0_opr(base_addr);
 731                 break;
 732         }
 733
 734         if (crq->bRequestType & USB_DIR_IN)
 735                 dev->ep0state = EP0_IN_DATA_PHASE;
 736         else
 737                 dev->ep0state = EP0_OUT_DATA_PHASE;
 738
 739         if (!dev->driver)
 740                 return;
 741
 742         /* deliver the request to the gadget driver */
 743         ret = dev->driver->setup(&dev->gadget, crq);
 744         if (ret < 0) {
 745                 if (dev->req_config) {
 746                         dprintk(DEBUG_NORMAL, "config change %02x fail %d?\n",
 747                                 crq->bRequest, ret);
 748                         return;
 749                 }
 750
 751                 if (ret == -EOPNOTSUPP)
 752                         dprintk(DEBUG_NORMAL, "Operation not supported\n");
 753                 else
 754                         dprintk(DEBUG_NORMAL,
 755                                 "dev->driver->setup failed. (%d)\n", ret);
 756
 757                 udelay(5);
 758                 s3c2410_udc_set_ep0_ss(base_addr);
 759                 s3c2410_udc_set_ep0_de_out(base_addr);
 760                 dev->ep0state = EP0_IDLE;
 761                 /* deferred i/o == no response yet */
 762         } else if (dev->req_pending) {
 763                 dprintk(DEBUG_VERBOSE, "dev->req_pending... what now?\n");
 764                 dev->req_pending=0;
 765         }
 766
 767         dprintk(DEBUG_VERBOSE, "ep0state %s\n", ep0states[dev->ep0state]);
 768 }
 769
 770 static void s3c2410_udc_handle_ep0(struct s3c2410_udc *dev)
 771 {
 772         u32                     ep0csr;
 773         struct s3c2410_ep       *ep = &dev->ep[0];
 774         struct s3c2410_request  *req;
 775         struct usb_ctrlrequest  crq;
 776
 777         if (list_empty(&ep->queue))
 778                 req = NULL;
 779         else
 780                 req = list_entry(ep->queue.next, struct s3c2410_request, queue);
 781
 782         /* We make the assumption that S3C2410_UDC_IN_CSR1_REG equal to
 783          * S3C2410_UDC_EP0_CSR_REG when index is zero */
 784
 785         udc_write(0, S3C2410_UDC_INDEX_REG);
 786         ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 787
 788         dprintk(DEBUG_NORMAL, "ep0csr %x ep0state %s\n",
 789                 ep0csr, ep0states[dev->ep0state]);
 790
 791         /* clear stall status */
 792         if (ep0csr & S3C2410_UDC_EP0_CSR_SENTSTL) {
 793                 s3c2410_udc_nuke(dev, ep, -EPIPE);
 794                 dprintk(DEBUG_NORMAL, "... clear SENT_STALL ...\n");
 795                 s3c2410_udc_clear_ep0_sst(base_addr);
 796                 dev->ep0state = EP0_IDLE;
 797                 return;
 798         }
 799
 800         /* clear setup end */
 801         if (ep0csr & S3C2410_UDC_EP0_CSR_SE) {
 802                 dprintk(DEBUG_NORMAL, "... serviced SETUP_END ...\n");
 803                 s3c2410_udc_nuke(dev, ep, 0);
 804                 s3c2410_udc_clear_ep0_se(base_addr);
 805                 dev->ep0state = EP0_IDLE;
 806         }
 807
 808         switch (dev->ep0state) {
 809         case EP0_IDLE:
 810                 s3c2410_udc_handle_ep0_idle(dev, ep, &crq, ep0csr);
 811                 break;
 812
 813         case EP0_IN_DATA_PHASE:                 /* GET_DESCRIPTOR etc */
 814                 dprintk(DEBUG_NORMAL, "EP0_IN_DATA_PHASE ... what now?\n");
 815                 if (!(ep0csr & S3C2410_UDC_EP0_CSR_IPKRDY) && req) {
 816                         s3c2410_udc_write_fifo(ep, req);
 817                 }
 818                 break;
 819
 820         case EP0_OUT_DATA_PHASE:                /* SET_DESCRIPTOR etc */
 821                 dprintk(DEBUG_NORMAL, "EP0_OUT_DATA_PHASE ... what now?\n");
 822                 if ((ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY) && req ) {
 823                         s3c2410_udc_read_fifo(ep,req);
 824                 }
 825                 break;
 826
 827         case EP0_END_XFER:
 828                 dprintk(DEBUG_NORMAL, "EP0_END_XFER ... what now?\n");
 829                 dev->ep0state = EP0_IDLE;
 830                 break;
 831
 832         case EP0_STALL:
 833                 dprintk(DEBUG_NORMAL, "EP0_STALL ... what now?\n");
 834                 dev->ep0state = EP0_IDLE;
 835                 break;
 836         }
 837 }
 838
 839 /*
 840  *      handle_ep - Manage I/O endpoints
 841  */
 842
 843 static void s3c2410_udc_handle_ep(struct s3c2410_ep *ep)
 844 {
 845         struct s3c2410_request  *req;
 846         int                     is_in = ep->bEndpointAddress & USB_DIR_IN;
 847         u32                     ep_csr1;
 848         u32                     idx;
 849
 850         if (likely (!list_empty(&ep->queue)))
 851                 req = list_entry(ep->queue.next,
 852                                 struct s3c2410_request, queue);
 853         else
 854                 req = NULL;
 855
 856         idx = ep->bEndpointAddress & 0x7F;
 857
 858         if (is_in) {
 859                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 860                 ep_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
 861                 dprintk(DEBUG_VERBOSE, "ep%01d write csr:%02x %d\n",
 862                         idx, ep_csr1, req ? 1 : 0);
 863
 864                 if (ep_csr1 & S3C2410_UDC_ICSR1_SENTSTL) {
 865                         dprintk(DEBUG_VERBOSE, "st\n");
 866                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 867                         udc_write(ep_csr1 & ~S3C2410_UDC_ICSR1_SENTSTL,
 868                                         S3C2410_UDC_IN_CSR1_REG);
 869                         return;
 870                 }
 871
 872                 if (!(ep_csr1 & S3C2410_UDC_ICSR1_PKTRDY) && req) {
 873                         s3c2410_udc_write_fifo(ep,req);
 874                 }
 875         } else {
 876                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 877                 ep_csr1 = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 878                 dprintk(DEBUG_VERBOSE, "ep%01d rd csr:%02x\n", idx, ep_csr1);
 879
 880                 if (ep_csr1 & S3C2410_UDC_OCSR1_SENTSTL) {
 881                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 882                         udc_write(ep_csr1 & ~S3C2410_UDC_OCSR1_SENTSTL,
 883                                         S3C2410_UDC_OUT_CSR1_REG);
 884                         return;
 885                 }
 886
 887                 if ((ep_csr1 & S3C2410_UDC_OCSR1_PKTRDY) && req) {
 888                         s3c2410_udc_read_fifo(ep,req);
 889                 }
 890         }
 891 }
 892
 893 #include <mach/regs-irq.h>
 894
 895 /*
 896  *      s3c2410_udc_irq - interrupt handler
 897  */
 898 static irqreturn_t s3c2410_udc_irq(int dummy, void *_dev)
 899 {
 900         struct s3c2410_udc *dev = _dev;
 901         int usb_status;
 902         int usbd_status;
 903         int pwr_reg;
 904         int ep0csr;
 905         int i;
 906         u32 idx, idx2;
 907         unsigned long flags;
 908
 909         spin_lock_irqsave(&dev->lock, flags);
 910
 911         /* Driver connected ? */
 912         if (!dev->driver) {
 913                 /* Clear interrupts */
 914                 udc_write(udc_read(S3C2410_UDC_USB_INT_REG),
 915                                 S3C2410_UDC_USB_INT_REG);
 916                 udc_write(udc_read(S3C2410_UDC_EP_INT_REG),
 917                                 S3C2410_UDC_EP_INT_REG);
 918         }
 919
 920         /* Save index */
 921         idx = udc_read(S3C2410_UDC_INDEX_REG);
 922
 923         /* Read status registers */
 924         usb_status = udc_read(S3C2410_UDC_USB_INT_REG);
 925         usbd_status = udc_read(S3C2410_UDC_EP_INT_REG);
 926         pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
 927
 928         udc_writeb(base_addr, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 929         ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 930
 931         dprintk(DEBUG_NORMAL, "usbs=%02x, usbds=%02x, pwr=%02x ep0csr=%02x\n",
 932                 usb_status, usbd_status, pwr_reg, ep0csr);
 933
 934         /*
 935          * Now, handle interrupts. There's two types :
 936          * - Reset, Resume, Suspend coming -> usb_int_reg
 937          * - EP -> ep_int_reg
 938          */
 939
 940         /* RESET */
 941         if (usb_status & S3C2410_UDC_USBINT_RESET) {
 942                 /* two kind of reset :
 943                  * - reset start -> pwr reg = 8
 944                  * - reset end   -> pwr reg = 0
 945                  **/
 946                 dprintk(DEBUG_NORMAL, "USB reset csr %x pwr %x\n",
 947                         ep0csr, pwr_reg);
 948
 949                 dev->gadget.speed = USB_SPEED_UNKNOWN;
 950                 udc_write(0x00, S3C2410_UDC_INDEX_REG);
 951                 udc_write((dev->ep[0].ep.maxpacket & 0x7ff) >> 3,
 952                                 S3C2410_UDC_MAXP_REG);
 953                 dev->address = 0;
 954
 955                 dev->ep0state = EP0_IDLE;
 956                 dev->gadget.speed = USB_SPEED_FULL;
 957
 958                 /* clear interrupt */
 959                 udc_write(S3C2410_UDC_USBINT_RESET,
 960                                 S3C2410_UDC_USB_INT_REG);
 961
 962                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 963                 spin_unlock_irqrestore(&dev->lock, flags);
 964                 return IRQ_HANDLED;
 965         }
 966
 967         /* RESUME */
 968         if (usb_status & S3C2410_UDC_USBINT_RESUME) {
 969                 dprintk(DEBUG_NORMAL, "USB resume\n");
 970
 971                 /* clear interrupt */
 972                 udc_write(S3C2410_UDC_USBINT_RESUME,
 973                                 S3C2410_UDC_USB_INT_REG);
 974
 975                 if (dev->gadget.speed != USB_SPEED_UNKNOWN
 976                                 && dev->driver
 977                                 && dev->driver->resume)
 978                         dev->driver->resume(&dev->gadget);
 979         }
 980
 981         /* SUSPEND */
 982         if (usb_status & S3C2410_UDC_USBINT_SUSPEND) {
 983                 dprintk(DEBUG_NORMAL, "USB suspend\n");
 984
 985                 /* clear interrupt */
 986                 udc_write(S3C2410_UDC_USBINT_SUSPEND,
 987                                 S3C2410_UDC_USB_INT_REG);
 988
 989                 if (dev->gadget.speed != USB_SPEED_UNKNOWN
 990                                 && dev->driver
 991                                 && dev->driver->suspend)
 992                         dev->driver->suspend(&dev->gadget);
 993
 994                 dev->ep0state = EP0_IDLE;
 995         }
 996
 997         /* EP */
 998         /* control traffic */
 999         /* check on ep0csr != 0 is not a good idea as clearing in_pkt_ready
1000          * generate an interrupt
1001          */
1002         if (usbd_status & S3C2410_UDC_INT_EP0) {
1003                 dprintk(DEBUG_VERBOSE, "USB ep0 irq\n");
1004                 /* Clear the interrupt bit by setting it to 1 */
1005                 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_REG);
1006                 s3c2410_udc_handle_ep0(dev);
1007         }
1008
1009         /* endpoint data transfers */
1010         for (i = 1; i < S3C2410_ENDPOINTS; i++) {
1011                 u32 tmp = 1 << i;
1012                 if (usbd_status & tmp) {
1013                         dprintk(DEBUG_VERBOSE, "USB ep%d irq\n", i);
1014
1015                         /* Clear the interrupt bit by setting it to 1 */
1016                         udc_write(tmp, S3C2410_UDC_EP_INT_REG);
1017                         s3c2410_udc_handle_ep(&dev->ep[i]);
1018                 }
1019         }
1020
1021         /* what else causes this interrupt? a receive! who is it? */
1022         if (!usb_status && !usbd_status && !pwr_reg && !ep0csr) {
1023                 for (i = 1; i < S3C2410_ENDPOINTS; i++) {
1024                         idx2 = udc_read(S3C2410_UDC_INDEX_REG);
1025                         udc_write(i, S3C2410_UDC_INDEX_REG);
1026
1027                         if (udc_read(S3C2410_UDC_OUT_CSR1_REG) & 0x1)
1028                                 s3c2410_udc_handle_ep(&dev->ep[i]);
1029
1030                         /* restore index */
1031                         udc_write(idx2, S3C2410_UDC_INDEX_REG);
1032                 }
1033         }
1034
1035         dprintk(DEBUG_VERBOSE, "irq: %d s3c2410_udc_done.\n", IRQ_USBD);
1036
1037         /* Restore old index */
1038         udc_write(idx, S3C2410_UDC_INDEX_REG);
1039
1040         spin_unlock_irqrestore(&dev->lock, flags);
1041
1042         return IRQ_HANDLED;
1043 }
1044 /*------------------------- s3c2410_ep_ops ----------------------------------*/
1045
1046 static inline struct s3c2410_ep *to_s3c2410_ep(struct usb_ep *ep)
1047 {
1048         return container_of(ep, struct s3c2410_ep, ep);
1049 }
1050
1051 static inline struct s3c2410_udc *to_s3c2410_udc(struct usb_gadget *gadget)
1052 {
1053         return container_of(gadget, struct s3c2410_udc, gadget);
1054 }
1055
1056 static inline struct s3c2410_request *to_s3c2410_req(struct usb_request *req)
1057 {
1058         return container_of(req, struct s3c2410_request, req);
1059 }
1060
1061 /*
1062  *      s3c2410_udc_ep_enable
1063  */
1064 static int s3c2410_udc_ep_enable(struct usb_ep *_ep,
1065                                  const struct usb_endpoint_descriptor *desc)
1066 {
1067         struct s3c2410_udc      *dev;
1068         struct s3c2410_ep       *ep;
1069         u32                     max, tmp;
1070         unsigned long           flags;
1071         u32                     csr1,csr2;
1072         u32                     int_en_reg;
1073
1074         ep = to_s3c2410_ep(_ep);
1075
1076         if (!_ep || !desc || ep->desc
1077                         || _ep->name == ep0name
1078                         || desc->bDescriptorType != USB_DT_ENDPOINT)
1079                 return -EINVAL;
1080
1081         dev = ep->dev;
1082         if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
1083                 return -ESHUTDOWN;
1084
1085         max = le16_to_cpu(desc->wMaxPacketSize) & 0x1fff;
1086
1087         local_irq_save (flags);
1088         _ep->maxpacket = max & 0x7ff;
1089         ep->desc = desc;
1090         ep->halted = 0;
1091         ep->bEndpointAddress = desc->bEndpointAddress;
1092
1093         /* set max packet */
1094         udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1095         udc_write(max >> 3, S3C2410_UDC_MAXP_REG);
1096
1097         /* set type, direction, address; reset fifo counters */
1098         if (desc->bEndpointAddress & USB_DIR_IN) {
1099                 csr1 = S3C2410_UDC_ICSR1_FFLUSH|S3C2410_UDC_ICSR1_CLRDT;
1100                 csr2 = S3C2410_UDC_ICSR2_MODEIN|S3C2410_UDC_ICSR2_DMAIEN;
1101
1102                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1103                 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1104                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1105                 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1106         } else {
1107                 /* don't flush in fifo or it will cause endpoint interrupt */
1108                 csr1 = S3C2410_UDC_ICSR1_CLRDT;
1109                 csr2 = S3C2410_UDC_ICSR2_DMAIEN;
1110
1111                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1112                 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1113                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1114                 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1115
1116                 csr1 = S3C2410_UDC_OCSR1_FFLUSH | S3C2410_UDC_OCSR1_CLRDT;
1117                 csr2 = S3C2410_UDC_OCSR2_DMAIEN;
1118
1119                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1120                 udc_write(csr1, S3C2410_UDC_OUT_CSR1_REG);
1121                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1122                 udc_write(csr2, S3C2410_UDC_OUT_CSR2_REG);
1123         }
1124
1125         /* enable irqs */
1126         int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1127         udc_write(int_en_reg | (1 << ep->num), S3C2410_UDC_EP_INT_EN_REG);
1128
1129         /* print some debug message */
1130         tmp = desc->bEndpointAddress;
1131         dprintk (DEBUG_NORMAL, "enable %s(%d) ep%x%s-blk max %02x\n",
1132                  _ep->name,ep->num, tmp,
1133                  desc->bEndpointAddress & USB_DIR_IN ? "in" : "out", max);
1134
1135         local_irq_restore (flags);
1136         s3c2410_udc_set_halt(_ep, 0);
1137
1138         return 0;
1139 }
1140
1141 /*
1142  * s3c2410_udc_ep_disable
1143  */
1144 static int s3c2410_udc_ep_disable(struct usb_ep *_ep)
1145 {
1146         struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1147         unsigned long flags;
1148         u32 int_en_reg;
1149
1150         if (!_ep || !ep->desc) {
1151                 dprintk(DEBUG_NORMAL, "%s not enabled\n",
1152                         _ep ? ep->ep.name : NULL);
1153                 return -EINVAL;
1154         }
1155
1156         local_irq_save(flags);
1157
1158         dprintk(DEBUG_NORMAL, "ep_disable: %s\n", _ep->name);
1159
1160         ep->desc = NULL;
1161         ep->halted = 1;
1162
1163         s3c2410_udc_nuke (ep->dev, ep, -ESHUTDOWN);
1164
1165         /* disable irqs */
1166         int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1167         udc_write(int_en_reg & ~(1<<ep->num), S3C2410_UDC_EP_INT_EN_REG);
1168
1169         local_irq_restore(flags);
1170
1171         dprintk(DEBUG_NORMAL, "%s disabled\n", _ep->name);
1172
1173         return 0;
1174 }
1175
1176 /*
1177  * s3c2410_udc_alloc_request
1178  */
1179 static struct usb_request *
1180 s3c2410_udc_alloc_request(struct usb_ep *_ep, gfp_t mem_flags)
1181 {
1182         struct s3c2410_request *req;
1183
1184         dprintk(DEBUG_VERBOSE,"%s(%p,%d)\n", __func__, _ep, mem_flags);
1185
1186         if (!_ep)
1187                 return NULL;
1188
1189         req = kzalloc (sizeof(struct s3c2410_request), mem_flags);
1190         if (!req)
1191                 return NULL;
1192
1193         INIT_LIST_HEAD (&req->queue);
1194         return &req->req;
1195 }
1196
1197 /*
1198  * s3c2410_udc_free_request
1199  */
1200 static void
1201 s3c2410_udc_free_request(struct usb_ep *_ep, struct usb_request *_req)
1202 {
1203         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1204         struct s3c2410_request  *req = to_s3c2410_req(_req);
1205
1206         dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1207
1208         if (!ep || !_req || (!ep->desc && _ep->name != ep0name))
1209                 return;
1210
1211         WARN_ON (!list_empty (&req->queue));
1212         kfree(req);
1213 }
1214
1215 /*
1216  *      s3c2410_udc_queue
1217  */
1218 static int s3c2410_udc_queue(struct usb_ep *_ep, struct usb_request *_req,
1219                 gfp_t gfp_flags)
1220 {
1221         struct s3c2410_request  *req = to_s3c2410_req(_req);
1222         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1223         struct s3c2410_udc      *dev;
1224         u32                     ep_csr = 0;
1225         int                     fifo_count = 0;
1226         unsigned long           flags;
1227
1228         if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1229                 dprintk(DEBUG_NORMAL, "%s: invalid args\n", __func__);
1230                 return -EINVAL;
1231         }
1232
1233         dev = ep->dev;
1234         if (unlikely (!dev->driver
1235                         || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
1236                 return -ESHUTDOWN;
1237         }
1238
1239         local_irq_save (flags);
1240
1241         if (unlikely(!_req || !_req->complete
1242                         || !_req->buf || !list_empty(&req->queue))) {
1243                 if (!_req)
1244                         dprintk(DEBUG_NORMAL, "%s: 1 X X X\n", __func__);
1245                 else {
1246                         dprintk(DEBUG_NORMAL, "%s: 0 %01d %01d %01d\n",
1247                                 __func__, !_req->complete,!_req->buf,
1248                                 !list_empty(&req->queue));
1249                 }
1250
1251                 local_irq_restore(flags);
1252                 return -EINVAL;
1253         }
1254
1255         _req->status = -EINPROGRESS;
1256         _req->actual = 0;
1257
1258         dprintk(DEBUG_VERBOSE, "%s: ep%x len %d\n",
1259                  __func__, ep->bEndpointAddress, _req->length);
1260
1261         if (ep->bEndpointAddress) {
1262                 udc_write(ep->bEndpointAddress & 0x7F, S3C2410_UDC_INDEX_REG);
1263
1264                 ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
1265                                 ? S3C2410_UDC_IN_CSR1_REG
1266                                 : S3C2410_UDC_OUT_CSR1_REG);
1267                 fifo_count = s3c2410_udc_fifo_count_out();
1268         } else {
1269                 udc_write(0, S3C2410_UDC_INDEX_REG);
1270                 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
1271                 fifo_count = s3c2410_udc_fifo_count_out();
1272         }
1273
1274         /* kickstart this i/o queue? */
1275         if (list_empty(&ep->queue) && !ep->halted) {
1276                 if (ep->bEndpointAddress == 0 /* ep0 */) {
1277                         switch (dev->ep0state) {
1278                         case EP0_IN_DATA_PHASE:
1279                                 if (!(ep_csr&S3C2410_UDC_EP0_CSR_IPKRDY)
1280                                                 && s3c2410_udc_write_fifo(ep,
1281                                                         req)) {
1282                                         dev->ep0state = EP0_IDLE;
1283                                         req = NULL;
1284                                 }
1285                                 break;
1286
1287                         case EP0_OUT_DATA_PHASE:
1288                                 if ((!_req->length)
1289                                         || ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1290                                                 && s3c2410_udc_read_fifo(ep,
1291                                                         req))) {
1292                                         dev->ep0state = EP0_IDLE;
1293                                         req = NULL;
1294                                 }
1295                                 break;
1296
1297                         default:
1298                                 local_irq_restore(flags);
1299                                 return -EL2HLT;
1300                         }
1301                 } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0
1302                                 && (!(ep_csr&S3C2410_UDC_OCSR1_PKTRDY))
1303                                 && s3c2410_udc_write_fifo(ep, req)) {
1304                         req = NULL;
1305                 } else if ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1306                                 && fifo_count
1307                                 && s3c2410_udc_read_fifo(ep, req)) {
1308                         req = NULL;
1309                 }
1310         }
1311
1312         /* pio or dma irq handler advances the queue. */
1313         if (likely (req != 0))
1314                 list_add_tail(&req->queue, &ep->queue);
1315
1316         local_irq_restore(flags);
1317
1318         dprintk(DEBUG_VERBOSE, "%s ok\n", __func__);
1319         return 0;
1320 }
1321
1322 /*
1323  *      s3c2410_udc_dequeue
1324  */
1325 static int s3c2410_udc_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1326 {
1327         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1328         struct s3c2410_udc      *udc;
1329         int                     retval = -EINVAL;
1330         unsigned long           flags;
1331         struct s3c2410_request  *req = NULL;
1332
1333         dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1334
1335         if (!the_controller->driver)
1336                 return -ESHUTDOWN;
1337
1338         if (!_ep || !_req)
1339                 return retval;
1340
1341         udc = to_s3c2410_udc(ep->gadget);
1342
1343         local_irq_save (flags);
1344
1345         list_for_each_entry (req, &ep->queue, queue) {
1346                 if (&req->req == _req) {
1347                         list_del_init (&req->queue);
1348                         _req->status = -ECONNRESET;
1349                         retval = 0;
1350                         break;
1351                 }
1352         }
1353
1354         if (retval == 0) {
1355                 dprintk(DEBUG_VERBOSE,
1356                         "dequeued req %p from %s, len %d buf %p\n",
1357                         req, _ep->name, _req->length, _req->buf);
1358
1359                 s3c2410_udc_done(ep, req, -ECONNRESET);
1360         }
1361
1362         local_irq_restore (flags);
1363         return retval;
1364 }
1365
1366 /*
1367  * s3c2410_udc_set_halt
1368  */
1369 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value)
1370 {
1371         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1372         u32                     ep_csr = 0;
1373         unsigned long           flags;
1374         u32                     idx;
1375
1376         if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1377                 dprintk(DEBUG_NORMAL, "%s: inval 2\n", __func__);
1378                 return -EINVAL;
1379         }
1380
1381         local_irq_save (flags);
1382
1383         idx = ep->bEndpointAddress & 0x7F;
1384
1385         if (idx == 0) {
1386                 s3c2410_udc_set_ep0_ss(base_addr);
1387                 s3c2410_udc_set_ep0_de_out(base_addr);
1388         } else {
1389                 udc_write(idx, S3C2410_UDC_INDEX_REG);
1390                 ep_csr = udc_read((ep->bEndpointAddress &USB_DIR_IN)
1391                                 ? S3C2410_UDC_IN_CSR1_REG
1392                                 : S3C2410_UDC_OUT_CSR1_REG);
1393
1394                 if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
1395                         if (value)
1396                                 udc_write(ep_csr | S3C2410_UDC_ICSR1_SENDSTL,
1397                                         S3C2410_UDC_IN_CSR1_REG);
1398                         else {
1399                                 ep_csr &= ~S3C2410_UDC_ICSR1_SENDSTL;
1400                                 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1401                                 ep_csr |= S3C2410_UDC_ICSR1_CLRDT;
1402                                 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1403                         }
1404                 } else {
1405                         if (value)
1406                                 udc_write(ep_csr | S3C2410_UDC_OCSR1_SENDSTL,
1407                                         S3C2410_UDC_OUT_CSR1_REG);
1408                         else {
1409                                 ep_csr &= ~S3C2410_UDC_OCSR1_SENDSTL;
1410                                 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1411                                 ep_csr |= S3C2410_UDC_OCSR1_CLRDT;
1412                                 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1413                         }
1414                 }
1415         }
1416
1417         ep->halted = value ? 1 : 0;
1418         local_irq_restore (flags);
1419
1420         return 0;
1421 }
1422
1423 static const struct usb_ep_ops s3c2410_ep_ops = {
1424         .enable         = s3c2410_udc_ep_enable,
1425         .disable        = s3c2410_udc_ep_disable,
1426
1427         .alloc_request  = s3c2410_udc_alloc_request,
1428         .free_request   = s3c2410_udc_free_request,
1429
1430         .queue          = s3c2410_udc_queue,
1431         .dequeue        = s3c2410_udc_dequeue,
1432
1433         .set_halt       = s3c2410_udc_set_halt,
1434 };
1435
1436 /*------------------------- usb_gadget_ops ----------------------------------*/
1437
1438 /*
1439  *      s3c2410_udc_get_frame
1440  */
1441 static int s3c2410_udc_get_frame(struct usb_gadget *_gadget)
1442 {
1443         int tmp;
1444
1445         dprintk(DEBUG_VERBOSE, "%s()\n", __func__);
1446
1447         tmp = udc_read(S3C2410_UDC_FRAME_NUM2_REG) << 8;
1448         tmp |= udc_read(S3C2410_UDC_FRAME_NUM1_REG);
1449         return tmp;
1450 }
1451
1452 /*
1453  *      s3c2410_udc_wakeup
1454  */
1455 static int s3c2410_udc_wakeup(struct usb_gadget *_gadget)
1456 {
1457         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1458         return 0;
1459 }
1460
1461 /*
1462  *      s3c2410_udc_set_selfpowered
1463  */
1464 static int s3c2410_udc_set_selfpowered(struct usb_gadget *gadget, int value)
1465 {
1466         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1467
1468         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1469
1470         if (value)
1471                 udc->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
1472         else
1473                 udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
1474
1475         return 0;
1476 }
1477
1478 static void s3c2410_udc_disable(struct s3c2410_udc *dev);
1479 static void s3c2410_udc_enable(struct s3c2410_udc *dev);
1480
1481 static int s3c2410_udc_set_pullup(struct s3c2410_udc *udc, int is_on)
1482 {
1483         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1484
1485         if (udc_info && (udc_info->udc_command ||
1486                 gpio_is_valid(udc_info->pullup_pin))) {
1487
1488                 if (is_on)
1489                         s3c2410_udc_enable(udc);
1490                 else {
1491                         if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
1492                                 if (udc->driver && udc->driver->disconnect)
1493                                         udc->driver->disconnect(&udc->gadget);
1494
1495                         }
1496                         s3c2410_udc_disable(udc);
1497                 }
1498         }
1499         else
1500                 return -EOPNOTSUPP;
1501
1502         return 0;
1503 }
1504
1505 static int s3c2410_udc_vbus_session(struct usb_gadget *gadget, int is_active)
1506 {
1507         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1508
1509         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1510
1511         udc->vbus = (is_active != 0);
1512         s3c2410_udc_set_pullup(udc, is_active);
1513         return 0;
1514 }
1515
1516 static int s3c2410_udc_pullup(struct usb_gadget *gadget, int is_on)
1517 {
1518         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1519
1520         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1521
1522         s3c2410_udc_set_pullup(udc, is_on ? 0 : 1);
1523         return 0;
1524 }
1525
1526 static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev)
1527 {
1528         struct s3c2410_udc      *dev = _dev;
1529         unsigned int            value;
1530
1531         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1532
1533         value = gpio_get_value(udc_info->vbus_pin) ? 1 : 0;
1534         if (udc_info->vbus_pin_inverted)
1535                 value = !value;
1536
1537         if (value != dev->vbus)
1538                 s3c2410_udc_vbus_session(&dev->gadget, value);
1539
1540         return IRQ_HANDLED;
1541 }
1542
1543 static int s3c2410_vbus_draw(struct usb_gadget *_gadget, unsigned ma)
1544 {
1545         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1546
1547         if (udc_info && udc_info->vbus_draw) {
1548                 udc_info->vbus_draw(ma);
1549                 return 0;
1550         }
1551
1552         return -ENOTSUPP;
1553 }
1554
1555 static int s3c2410_udc_start(struct usb_gadget_driver *driver,
1556                 int (*bind)(struct usb_gadget *));
1557 static int s3c2410_udc_stop(struct usb_gadget_driver *driver);
1558
1559 static const struct usb_gadget_ops s3c2410_ops = {
1560         .get_frame              = s3c2410_udc_get_frame,
1561         .wakeup                 = s3c2410_udc_wakeup,
1562         .set_selfpowered        = s3c2410_udc_set_selfpowered,
1563         .pullup                 = s3c2410_udc_pullup,
1564         .vbus_session           = s3c2410_udc_vbus_session,
1565         .vbus_draw              = s3c2410_vbus_draw,
1566         .start                  = s3c2410_udc_start,
1567         .stop                   = s3c2410_udc_stop,
1568 };
1569
1570 static void s3c2410_udc_command(enum s3c2410_udc_cmd_e cmd)
1571 {
1572         if (!udc_info)
1573                 return;
1574
1575         if (udc_info->udc_command) {
1576                 udc_info->udc_command(cmd);
1577         } else if (gpio_is_valid(udc_info->pullup_pin)) {
1578                 int value;
1579
1580                 switch (cmd) {
1581                 case S3C2410_UDC_P_ENABLE:
1582                         value = 1;
1583                         break;
1584                 case S3C2410_UDC_P_DISABLE:
1585                         value = 0;
1586                         break;
1587                 default:
1588                         return;
1589                 }
1590                 value ^= udc_info->pullup_pin_inverted;
1591
1592                 gpio_set_value(udc_info->pullup_pin, value);
1593         }
1594 }
1595
1596 /*------------------------- gadget driver handling---------------------------*/
1597 /*
1598  * s3c2410_udc_disable
1599  */
1600 static void s3c2410_udc_disable(struct s3c2410_udc *dev)
1601 {
1602         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1603
1604         /* Disable all interrupts */
1605         udc_write(0x00, S3C2410_UDC_USB_INT_EN_REG);
1606         udc_write(0x00, S3C2410_UDC_EP_INT_EN_REG);
1607
1608         /* Clear the interrupt registers */
1609         udc_write(S3C2410_UDC_USBINT_RESET
1610                                 | S3C2410_UDC_USBINT_RESUME
1611                                 | S3C2410_UDC_USBINT_SUSPEND,
1612                         S3C2410_UDC_USB_INT_REG);
1613
1614         udc_write(0x1F, S3C2410_UDC_EP_INT_REG);
1615
1616         /* Good bye, cruel world */
1617         s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
1618
1619         /* Set speed to unknown */
1620         dev->gadget.speed = USB_SPEED_UNKNOWN;
1621 }
1622
1623 /*
1624  * s3c2410_udc_reinit
1625  */
1626 static void s3c2410_udc_reinit(struct s3c2410_udc *dev)
1627 {
1628         u32 i;
1629
1630         /* device/ep0 records init */
1631         INIT_LIST_HEAD (&dev->gadget.ep_list);
1632         INIT_LIST_HEAD (&dev->gadget.ep0->ep_list);
1633         dev->ep0state = EP0_IDLE;
1634
1635         for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1636                 struct s3c2410_ep *ep = &dev->ep[i];
1637
1638                 if (i != 0)
1639                         list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
1640
1641                 ep->dev = dev;
1642                 ep->desc = NULL;
1643                 ep->halted = 0;
1644                 INIT_LIST_HEAD (&ep->queue);
1645         }
1646 }
1647
1648 /*
1649  * s3c2410_udc_enable
1650  */
1651 static void s3c2410_udc_enable(struct s3c2410_udc *dev)
1652 {
1653         int i;
1654
1655         dprintk(DEBUG_NORMAL, "s3c2410_udc_enable called\n");
1656
1657         /* dev->gadget.speed = USB_SPEED_UNKNOWN; */
1658         dev->gadget.speed = USB_SPEED_FULL;
1659
1660         /* Set MAXP for all endpoints */
1661         for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1662                 udc_write(i, S3C2410_UDC_INDEX_REG);
1663                 udc_write((dev->ep[i].ep.maxpacket & 0x7ff) >> 3,
1664                                 S3C2410_UDC_MAXP_REG);
1665         }
1666
1667         /* Set default power state */
1668         udc_write(DEFAULT_POWER_STATE, S3C2410_UDC_PWR_REG);
1669
1670         /* Enable reset and suspend interrupt interrupts */
1671         udc_write(S3C2410_UDC_USBINT_RESET | S3C2410_UDC_USBINT_SUSPEND,
1672                         S3C2410_UDC_USB_INT_EN_REG);
1673
1674         /* Enable ep0 interrupt */
1675         udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_EN_REG);
1676
1677         /* time to say "hello, world" */
1678         s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
1679 }
1680
1681 static int s3c2410_udc_start(struct usb_gadget_driver *driver,
1682                 int (*bind)(struct usb_gadget *))
1683 {
1684         struct s3c2410_udc *udc = the_controller;
1685         int             retval;
1686
1687         dprintk(DEBUG_NORMAL, "%s() '%s'\n", __func__, driver->driver.name);
1688
1689         /* Sanity checks */
1690         if (!udc)
1691                 return -ENODEV;
1692
1693         if (udc->driver)
1694                 return -EBUSY;
1695
1696         if (!bind || !driver->setup || driver->speed < USB_SPEED_FULL) {
1697                 printk(KERN_ERR "Invalid driver: bind %p setup %p speed %d\n",
1698                         bind, driver->setup, driver->speed);
1699                 return -EINVAL;
1700         }
1701 #if defined(MODULE)
1702         if (!driver->unbind) {
1703                 printk(KERN_ERR "Invalid driver: no unbind method\n");
1704                 return -EINVAL;
1705         }
1706 #endif
1707
1708         /* Hook the driver */
1709         udc->driver = driver;
1710         udc->gadget.dev.driver = &driver->driver;
1711
1712         /* Bind the driver */
1713         if ((retval = device_add(&udc->gadget.dev)) != 0) {
1714                 printk(KERN_ERR "Error in device_add() : %d\n",retval);
1715                 goto register_error;
1716         }
1717
1718         dprintk(DEBUG_NORMAL, "binding gadget driver '%s'\n",
1719                 driver->driver.name);
1720
1721         if ((retval = bind(&udc->gadget)) != 0) {
1722                 device_del(&udc->gadget.dev);
1723                 goto register_error;
1724         }
1725
1726         /* Enable udc */
1727         s3c2410_udc_enable(udc);
1728
1729         return 0;
1730
1731 register_error:
1732         udc->driver = NULL;
1733         udc->gadget.dev.driver = NULL;
1734         return retval;
1735 }
1736
1737 static int s3c2410_udc_stop(struct usb_gadget_driver *driver)
1738 {
1739         struct s3c2410_udc *udc = the_controller;
1740
1741         if (!udc)
1742                 return -ENODEV;
1743
1744         if (!driver || driver != udc->driver || !driver->unbind)
1745                 return -EINVAL;
1746
1747         dprintk(DEBUG_NORMAL, "usb_gadget_unregister_driver() '%s'\n",
1748                 driver->driver.name);
1749
1750         /* report disconnect */
1751         if (driver->disconnect)
1752                 driver->disconnect(&udc->gadget);
1753
1754         driver->unbind(&udc->gadget);
1755
1756         device_del(&udc->gadget.dev);
1757         udc->driver = NULL;
1758
1759         /* Disable udc */
1760         s3c2410_udc_disable(udc);
1761
1762         return 0;
1763 }
1764
1765 /*---------------------------------------------------------------------------*/
1766 static struct s3c2410_udc memory = {
1767         .gadget = {
1768                 .ops            = &s3c2410_ops,
1769                 .ep0            = &memory.ep[0].ep,
1770                 .name           = gadget_name,
1771                 .dev = {
1772                         .init_name      = "gadget",
1773                 },
1774         },
1775
1776         /* control endpoint */
1777         .ep[0] = {
1778                 .num            = 0,
1779                 .ep = {
1780                         .name           = ep0name,
1781                         .ops            = &s3c2410_ep_ops,
1782                         .maxpacket      = EP0_FIFO_SIZE,
1783                 },
1784                 .dev            = &memory,
1785         },
1786
1787         /* first group of endpoints */
1788         .ep[1] = {
1789                 .num            = 1,
1790                 .ep = {
1791                         .name           = "ep1-bulk",
1792                         .ops            = &s3c2410_ep_ops,
1793                         .maxpacket      = EP_FIFO_SIZE,
1794                 },
1795                 .dev            = &memory,
1796                 .fifo_size      = EP_FIFO_SIZE,
1797                 .bEndpointAddress = 1,
1798                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1799         },
1800         .ep[2] = {
1801                 .num            = 2,
1802                 .ep = {
1803                         .name           = "ep2-bulk",
1804                         .ops            = &s3c2410_ep_ops,
1805                         .maxpacket      = EP_FIFO_SIZE,
1806                 },
1807                 .dev            = &memory,
1808                 .fifo_size      = EP_FIFO_SIZE,
1809                 .bEndpointAddress = 2,
1810                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1811         },
1812         .ep[3] = {
1813                 .num            = 3,
1814                 .ep = {
1815                         .name           = "ep3-bulk",
1816                         .ops            = &s3c2410_ep_ops,
1817                         .maxpacket      = EP_FIFO_SIZE,
1818                 },
1819                 .dev            = &memory,
1820                 .fifo_size      = EP_FIFO_SIZE,
1821                 .bEndpointAddress = 3,
1822                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1823         },
1824         .ep[4] = {
1825                 .num            = 4,
1826                 .ep = {
1827                         .name           = "ep4-bulk",
1828                         .ops            = &s3c2410_ep_ops,
1829                         .maxpacket      = EP_FIFO_SIZE,
1830                 },
1831                 .dev            = &memory,
1832                 .fifo_size      = EP_FIFO_SIZE,
1833                 .bEndpointAddress = 4,
1834                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1835         }
1836
1837 };
1838
1839 /*
1840  *      probe - binds to the platform device
1841  */
1842 static int s3c2410_udc_probe(struct platform_device *pdev)
1843 {
1844         struct s3c2410_udc *udc = &memory;
1845         struct device *dev = &pdev->dev;
1846         int retval;
1847         int irq;
1848
1849         dev_dbg(dev, "%s()\n", __func__);
1850
1851         usb_bus_clock = clk_get(NULL, "usb-bus-gadget");
1852         if (IS_ERR(usb_bus_clock)) {
1853                 dev_err(dev, "failed to get usb bus clock source\n");
1854                 return PTR_ERR(usb_bus_clock);
1855         }
1856
1857         clk_enable(usb_bus_clock);
1858
1859         udc_clock = clk_get(NULL, "usb-device");
1860         if (IS_ERR(udc_clock)) {
1861                 dev_err(dev, "failed to get udc clock source\n");
1862                 return PTR_ERR(udc_clock);
1863         }
1864
1865         clk_enable(udc_clock);
1866
1867         mdelay(10);
1868
1869         dev_dbg(dev, "got and enabled clocks\n");
1870
1871         if (strncmp(pdev->name, "s3c2440", 7) == 0) {
1872                 dev_info(dev, "S3C2440: increasing FIFO to 128 bytes\n");
1873                 memory.ep[1].fifo_size = S3C2440_EP_FIFO_SIZE;
1874                 memory.ep[2].fifo_size = S3C2440_EP_FIFO_SIZE;
1875                 memory.ep[3].fifo_size = S3C2440_EP_FIFO_SIZE;
1876                 memory.ep[4].fifo_size = S3C2440_EP_FIFO_SIZE;
1877         }
1878
1879         spin_lock_init (&udc->lock);
1880         udc_info = pdev->dev.platform_data;
1881
1882         rsrc_start = S3C2410_PA_USBDEV;
1883         rsrc_len   = S3C24XX_SZ_USBDEV;
1884
1885         if (!request_mem_region(rsrc_start, rsrc_len, gadget_name))
1886                 return -EBUSY;
1887
1888         base_addr = ioremap(rsrc_start, rsrc_len);
1889         if (!base_addr) {
1890                 retval = -ENOMEM;
1891                 goto err_mem;
1892         }
1893
1894         device_initialize(&udc->gadget.dev);
1895         udc->gadget.dev.parent = &pdev->dev;
1896         udc->gadget.dev.dma_mask = pdev->dev.dma_mask;
1897
1898         the_controller = udc;
1899         platform_set_drvdata(pdev, udc);
1900
1901         s3c2410_udc_disable(udc);
1902         s3c2410_udc_reinit(udc);
1903
1904         /* irq setup after old hardware state is cleaned up */
1905         retval = request_irq(IRQ_USBD, s3c2410_udc_irq,
1906                              IRQF_DISABLED, gadget_name, udc);
1907
1908         if (retval != 0) {
1909                 dev_err(dev, "cannot get irq %i, err %d\n", IRQ_USBD, retval);
1910                 retval = -EBUSY;
1911                 goto err_map;
1912         }
1913
1914         dev_dbg(dev, "got irq %i\n", IRQ_USBD);
1915
1916         if (udc_info && udc_info->vbus_pin > 0) {
1917                 retval = gpio_request(udc_info->vbus_pin, "udc vbus");
1918                 if (retval < 0) {
1919                         dev_err(dev, "cannot claim vbus pin\n");
1920                         goto err_int;
1921                 }
1922
1923                 irq = gpio_to_irq(udc_info->vbus_pin);
1924                 if (irq < 0) {
1925                         dev_err(dev, "no irq for gpio vbus pin\n");
1926                         goto err_gpio_claim;
1927                 }
1928
1929                 retval = request_irq(irq, s3c2410_udc_vbus_irq,
1930                                      IRQF_DISABLED | IRQF_TRIGGER_RISING
1931                                      | IRQF_TRIGGER_FALLING | IRQF_SHARED,
1932                                      gadget_name, udc);
1933
1934                 if (retval != 0) {
1935                         dev_err(dev, "can't get vbus irq %d, err %d\n",
1936                                 irq, retval);
1937                         retval = -EBUSY;
1938                         goto err_gpio_claim;
1939                 }
1940
1941                 dev_dbg(dev, "got irq %i\n", irq);
1942         } else {
1943                 udc->vbus = 1;
1944         }
1945
1946         if (udc_info && !udc_info->udc_command &&
1947                 gpio_is_valid(udc_info->pullup_pin)) {
1948
1949                 retval = gpio_request_one(udc_info->pullup_pin,
1950                                 udc_info->vbus_pin_inverted ?
1951                                 GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
1952                                 "udc pullup");
1953                 if (retval)
1954                         goto err_vbus_irq;
1955         }
1956
1957         retval = usb_add_gadget_udc(&pdev->dev, &udc->gadget);
1958         if (retval)
1959                 goto err_add_udc;
1960
1961         if (s3c2410_udc_debugfs_root) {
1962                 udc->regs_info = debugfs_create_file("registers", S_IRUGO,
1963                                 s3c2410_udc_debugfs_root,
1964                                 udc, &s3c2410_udc_debugfs_fops);
1965                 if (!udc->regs_info)
1966                         dev_warn(dev, "debugfs file creation failed\n");
1967         }
1968
1969         dev_dbg(dev, "probe ok\n");
1970
1971         return 0;
1972
1973 err_add_udc:
1974         if (udc_info && !udc_info->udc_command &&
1975                         gpio_is_valid(udc_info->pullup_pin))
1976                 gpio_free(udc_info->pullup_pin);
1977 err_vbus_irq:
1978         if (udc_info && udc_info->vbus_pin > 0)
1979                 free_irq(gpio_to_irq(udc_info->vbus_pin), udc);
1980 err_gpio_claim:
1981         if (udc_info && udc_info->vbus_pin > 0)
1982                 gpio_free(udc_info->vbus_pin);
1983 err_int:
1984         free_irq(IRQ_USBD, udc);
1985 err_map:
1986         iounmap(base_addr);
1987 err_mem:
1988         release_mem_region(rsrc_start, rsrc_len);
1989
1990         return retval;
1991 }
1992
1993 /*
1994  *      s3c2410_udc_remove
1995  */
1996 static int s3c2410_udc_remove(struct platform_device *pdev)
1997 {
1998         struct s3c2410_udc *udc = platform_get_drvdata(pdev);
1999         unsigned int irq;
2000
2001         dev_dbg(&pdev->dev, "%s()\n", __func__);
2002
2003         usb_del_gadget_udc(&udc->gadget);
2004         if (udc->driver)
2005                 return -EBUSY;
2006
2007         debugfs_remove(udc->regs_info);
2008
2009         if (udc_info && !udc_info->udc_command &&
2010                 gpio_is_valid(udc_info->pullup_pin))
2011                 gpio_free(udc_info->pullup_pin);
2012
2013         if (udc_info && udc_info->vbus_pin > 0) {
2014                 irq = gpio_to_irq(udc_info->vbus_pin);
2015                 free_irq(irq, udc);
2016         }
2017
2018         free_irq(IRQ_USBD, udc);
2019
2020         iounmap(base_addr);
2021         release_mem_region(rsrc_start, rsrc_len);
2022
2023         platform_set_drvdata(pdev, NULL);
2024
2025         if (!IS_ERR(udc_clock) && udc_clock != NULL) {
2026                 clk_disable(udc_clock);
2027                 clk_put(udc_clock);
2028                 udc_clock = NULL;
2029         }
2030
2031         if (!IS_ERR(usb_bus_clock) && usb_bus_clock != NULL) {
2032                 clk_disable(usb_bus_clock);
2033                 clk_put(usb_bus_clock);
2034                 usb_bus_clock = NULL;
2035         }
2036
2037         dev_dbg(&pdev->dev, "%s: remove ok\n", __func__);
2038         return 0;
2039 }
2040
2041 #ifdef CONFIG_PM
2042 static int s3c2410_udc_suspend(struct platform_device *pdev, pm_message_t message)
2043 {
2044         s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
2045
2046         return 0;
2047 }
2048
2049 static int s3c2410_udc_resume(struct platform_device *pdev)
2050 {
2051         s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
2052
2053         return 0;
2054 }
2055 #else
2056 #define s3c2410_udc_suspend     NULL
2057 #define s3c2410_udc_resume      NULL
2058 #endif
2059
2060 static const struct platform_device_id s3c_udc_ids[] = {
2061         { "s3c2410-usbgadget", },
2062         { "s3c2440-usbgadget", },
2063 };
2064 MODULE_DEVICE_TABLE(platform, s3c_udc_ids);
2065
2066 static struct platform_driver udc_driver_24x0 = {
2067         .driver         = {
2068                 .name   = "s3c24x0-usbgadget",
2069                 .owner  = THIS_MODULE,
2070         },
2071         .probe          = s3c2410_udc_probe,
2072         .remove         = s3c2410_udc_remove,
2073         .suspend        = s3c2410_udc_suspend,
2074         .resume         = s3c2410_udc_resume,
2075         .id_table       = s3c_udc_ids,
2076 };
2077
2078 static int __init udc_init(void)
2079 {
2080         int retval;
2081
2082         dprintk(DEBUG_NORMAL, "%s: version %s\n", gadget_name, DRIVER_VERSION);
2083
2084         s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name, NULL);
2085         if (IS_ERR(s3c2410_udc_debugfs_root)) {
2086                 printk(KERN_ERR "%s: debugfs dir creation failed %ld\n",
2087                         gadget_name, PTR_ERR(s3c2410_udc_debugfs_root));
2088                 s3c2410_udc_debugfs_root = NULL;
2089         }
2090
2091         retval = platform_driver_register(&udc_driver_24x0);
2092         if (retval)
2093                 goto err;
2094
2095         return 0;
2096
2097 err:
2098         debugfs_remove(s3c2410_udc_debugfs_root);
2099         return retval;
2100 }
2101
2102 static void __exit udc_exit(void)
2103 {
2104         platform_driver_unregister(&udc_driver_24x0);
2105         debugfs_remove(s3c2410_udc_debugfs_root);
2106 }
2107
2108 module_init(udc_init);
2109 module_exit(udc_exit);
2110
2111 MODULE_AUTHOR(DRIVER_AUTHOR);
2112 MODULE_DESCRIPTION(DRIVER_DESC);
2113 MODULE_VERSION(DRIVER_VERSION);
2114 MODULE_LICENSE("GPL");