drivers/usb/gadget/udc/s3c2410_udc.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * linux/drivers/usb/gadget/s3c2410_udc.c
   4  *
   5  * Samsung S3C24xx series on-chip full speed USB device controllers
   6  *
   7  * Copyright (C) 2004-2007 Herbert Pötzl - Arnaud Patard
   8  *      Additional cleanups by Ben Dooks <ben-linux@fluff.org>
   9  */
  10
  11 #define pr_fmt(fmt) "s3c2410_udc: " fmt
  12
  13 #include <linux/module.h>
  14 #include <linux/kernel.h>
  15 #include <linux/delay.h>
  16 #include <linux/ioport.h>
  17 #include <linux/sched.h>
  18 #include <linux/slab.h>
  19 #include <linux/errno.h>
  20 #include <linux/init.h>
  21 #include <linux/timer.h>
  22 #include <linux/list.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/clk.h>
  26 #include <linux/gpio.h>
  27 #include <linux/prefetch.h>
  28 #include <linux/io.h>
  29
  30 #include <linux/debugfs.h>
  31 #include <linux/seq_file.h>
  32
  33 #include <linux/usb.h>
  34 #include <linux/usb/gadget.h>
  35
  36 #include <asm/byteorder.h>
  37 #include <asm/irq.h>
  38 #include <asm/unaligned.h>
  39 #include <mach/irqs.h>
  40
  41 #include <mach/hardware.h>
  42
  43 #include <plat/regs-udc.h>
  44 #include <linux/platform_data/usb-s3c2410_udc.h>
  45
  46
  47 #include "s3c2410_udc.h"
  48
  49 #define DRIVER_DESC     "S3C2410 USB Device Controller Gadget"
  50 #define DRIVER_AUTHOR   "Herbert Pötzl <herbert@13thfloor.at>, " \
  51                         "Arnaud Patard <arnaud.patard@rtp-net.org>"
  52
  53 static const char               gadget_name[] = "s3c2410_udc";
  54 static const char               driver_desc[] = DRIVER_DESC;
  55
  56 static struct s3c2410_udc       *the_controller;
  57 static struct clk               *udc_clock;
  58 static struct clk               *usb_bus_clock;
  59 static void __iomem             *base_addr;
  60 static u64                      rsrc_start;
  61 static u64                      rsrc_len;
  62 static struct dentry            *s3c2410_udc_debugfs_root;
  63
  64 static inline u32 udc_read(u32 reg)
  65 {
  66         return readb(base_addr + reg);
  67 }
  68
  69 static inline void udc_write(u32 value, u32 reg)
  70 {
  71         writeb(value, base_addr + reg);
  72 }
  73
  74 static inline void udc_writeb(void __iomem *base, u32 value, u32 reg)
  75 {
  76         writeb(value, base + reg);
  77 }
  78
  79 static struct s3c2410_udc_mach_info *udc_info;
  80
  81 /*************************** DEBUG FUNCTION ***************************/
  82 #define DEBUG_NORMAL    1
  83 #define DEBUG_VERBOSE   2
  84
  85 #ifdef CONFIG_USB_S3C2410_DEBUG
  86 #define USB_S3C2410_DEBUG_LEVEL 0
  87
  88 static uint32_t s3c2410_ticks = 0;
  89
  90 __printf(2, 3)
  91 static void dprintk(int level, const char *fmt, ...)
  92 {
  93         static long prevticks;
  94         static int invocation;
  95         struct va_format vaf;
  96         va_list args;
  97
  98         if (level > USB_S3C2410_DEBUG_LEVEL)
  99                 return;
 100
 101         va_start(args, fmt);
 102
 103         vaf.fmt = fmt;
 104         vaf.va = &args;
 105
 106         if (s3c2410_ticks != prevticks) {
 107                 prevticks = s3c2410_ticks;
 108                 invocation = 0;
 109         }
 110
 111         pr_debug("%1lu.%02d USB: %pV", prevticks, invocation++, &vaf);
 112
 113         va_end(args);
 114 }
 115 #else
 116 __printf(2, 3)
 117 static void dprintk(int level, const char *fmt, ...)
 118 {
 119 }
 120 #endif
 121
 122 static int s3c2410_udc_debugfs_show(struct seq_file *m, void *p)
 123 {
 124         u32 addr_reg, pwr_reg, ep_int_reg, usb_int_reg;
 125         u32 ep_int_en_reg, usb_int_en_reg, ep0_csr;
 126         u32 ep1_i_csr1, ep1_i_csr2, ep1_o_csr1, ep1_o_csr2;
 127         u32 ep2_i_csr1, ep2_i_csr2, ep2_o_csr1, ep2_o_csr2;
 128
 129         addr_reg       = udc_read(S3C2410_UDC_FUNC_ADDR_REG);
 130         pwr_reg        = udc_read(S3C2410_UDC_PWR_REG);
 131         ep_int_reg     = udc_read(S3C2410_UDC_EP_INT_REG);
 132         usb_int_reg    = udc_read(S3C2410_UDC_USB_INT_REG);
 133         ep_int_en_reg  = udc_read(S3C2410_UDC_EP_INT_EN_REG);
 134         usb_int_en_reg = udc_read(S3C2410_UDC_USB_INT_EN_REG);
 135         udc_write(0, S3C2410_UDC_INDEX_REG);
 136         ep0_csr        = udc_read(S3C2410_UDC_IN_CSR1_REG);
 137         udc_write(1, S3C2410_UDC_INDEX_REG);
 138         ep1_i_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 139         ep1_i_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 140         ep1_o_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 141         ep1_o_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 142         udc_write(2, S3C2410_UDC_INDEX_REG);
 143         ep2_i_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 144         ep2_i_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 145         ep2_o_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 146         ep2_o_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 147
 148         seq_printf(m, "FUNC_ADDR_REG  : 0x%04X\n"
 149                  "PWR_REG        : 0x%04X\n"
 150                  "EP_INT_REG     : 0x%04X\n"
 151                  "USB_INT_REG    : 0x%04X\n"
 152                  "EP_INT_EN_REG  : 0x%04X\n"
 153                  "USB_INT_EN_REG : 0x%04X\n"
 154                  "EP0_CSR        : 0x%04X\n"
 155                  "EP1_I_CSR1     : 0x%04X\n"
 156                  "EP1_I_CSR2     : 0x%04X\n"
 157                  "EP1_O_CSR1     : 0x%04X\n"
 158                  "EP1_O_CSR2     : 0x%04X\n"
 159                  "EP2_I_CSR1     : 0x%04X\n"
 160                  "EP2_I_CSR2     : 0x%04X\n"
 161                  "EP2_O_CSR1     : 0x%04X\n"
 162                  "EP2_O_CSR2     : 0x%04X\n",
 163                         addr_reg, pwr_reg, ep_int_reg, usb_int_reg,
 164                         ep_int_en_reg, usb_int_en_reg, ep0_csr,
 165                         ep1_i_csr1, ep1_i_csr2, ep1_o_csr1, ep1_o_csr2,
 166                         ep2_i_csr1, ep2_i_csr2, ep2_o_csr1, ep2_o_csr2
 167                 );
 168
 169         return 0;
 170 }
 171 DEFINE_SHOW_ATTRIBUTE(s3c2410_udc_debugfs);
 172
 173 /* io macros */
 174
 175 static inline void s3c2410_udc_clear_ep0_opr(void __iomem *base)
 176 {
 177         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 178         udc_writeb(base, S3C2410_UDC_EP0_CSR_SOPKTRDY,
 179                         S3C2410_UDC_EP0_CSR_REG);
 180 }
 181
 182 static inline void s3c2410_udc_clear_ep0_sst(void __iomem *base)
 183 {
 184         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 185         writeb(0x00, base + S3C2410_UDC_EP0_CSR_REG);
 186 }
 187
 188 static inline void s3c2410_udc_clear_ep0_se(void __iomem *base)
 189 {
 190         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 191         udc_writeb(base, S3C2410_UDC_EP0_CSR_SSE, S3C2410_UDC_EP0_CSR_REG);
 192 }
 193
 194 static inline void s3c2410_udc_set_ep0_ipr(void __iomem *base)
 195 {
 196         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 197         udc_writeb(base, S3C2410_UDC_EP0_CSR_IPKRDY, S3C2410_UDC_EP0_CSR_REG);
 198 }
 199
 200 static inline void s3c2410_udc_set_ep0_de(void __iomem *base)
 201 {
 202         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 203         udc_writeb(base, S3C2410_UDC_EP0_CSR_DE, S3C2410_UDC_EP0_CSR_REG);
 204 }
 205
 206 inline void s3c2410_udc_set_ep0_ss(void __iomem *b)
 207 {
 208         udc_writeb(b, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 209         udc_writeb(b, S3C2410_UDC_EP0_CSR_SENDSTL, S3C2410_UDC_EP0_CSR_REG);
 210 }
 211
 212 static inline void s3c2410_udc_set_ep0_de_out(void __iomem *base)
 213 {
 214         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 215
 216         udc_writeb(base, (S3C2410_UDC_EP0_CSR_SOPKTRDY
 217                                 | S3C2410_UDC_EP0_CSR_DE),
 218                         S3C2410_UDC_EP0_CSR_REG);
 219 }
 220
 221 static inline void s3c2410_udc_set_ep0_de_in(void __iomem *base)
 222 {
 223         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 224         udc_writeb(base, (S3C2410_UDC_EP0_CSR_IPKRDY
 225                         | S3C2410_UDC_EP0_CSR_DE),
 226                 S3C2410_UDC_EP0_CSR_REG);
 227 }
 228
 229 /*------------------------- I/O ----------------------------------*/
 230
 231 /*
 232  *      s3c2410_udc_done
 233  */
 234 static void s3c2410_udc_done(struct s3c2410_ep *ep,
 235                 struct s3c2410_request *req, int status)
 236 {
 237         unsigned halted = ep->halted;
 238
 239         list_del_init(&req->queue);
 240
 241         if (likely(req->req.status == -EINPROGRESS))
 242                 req->req.status = status;
 243         else
 244                 status = req->req.status;
 245
 246         ep->halted = 1;
 247         usb_gadget_giveback_request(&ep->ep, &req->req);
 248         ep->halted = halted;
 249 }
 250
 251 static void s3c2410_udc_nuke(struct s3c2410_udc *udc,
 252                 struct s3c2410_ep *ep, int status)
 253 {
 254         while (!list_empty(&ep->queue)) {
 255                 struct s3c2410_request *req;
 256                 req = list_entry(ep->queue.next, struct s3c2410_request,
 257                                 queue);
 258                 s3c2410_udc_done(ep, req, status);
 259         }
 260 }
 261
 262 static inline int s3c2410_udc_fifo_count_out(void)
 263 {
 264         int tmp;
 265
 266         tmp = udc_read(S3C2410_UDC_OUT_FIFO_CNT2_REG) << 8;
 267         tmp |= udc_read(S3C2410_UDC_OUT_FIFO_CNT1_REG);
 268         return tmp;
 269 }
 270
 271 /*
 272  *      s3c2410_udc_write_packet
 273  */
 274 static inline int s3c2410_udc_write_packet(int fifo,
 275                 struct s3c2410_request *req,
 276                 unsigned max)
 277 {
 278         unsigned len = min(req->req.length - req->req.actual, max);
 279         u8 *buf = req->req.buf + req->req.actual;
 280
 281         prefetch(buf);
 282
 283         dprintk(DEBUG_VERBOSE, "%s %d %d %d %d\n", __func__,
 284                 req->req.actual, req->req.length, len, req->req.actual + len);
 285
 286         req->req.actual += len;
 287
 288         udelay(5);
 289         writesb(base_addr + fifo, buf, len);
 290         return len;
 291 }
 292
 293 /*
 294  *      s3c2410_udc_write_fifo
 295  *
 296  * return:  0 = still running, 1 = completed, negative = errno
 297  */
 298 static int s3c2410_udc_write_fifo(struct s3c2410_ep *ep,
 299                 struct s3c2410_request *req)
 300 {
 301         unsigned        count;
 302         int             is_last;
 303         u32             idx;
 304         int             fifo_reg;
 305         u32             ep_csr;
 306
 307         idx = ep->bEndpointAddress & 0x7F;
 308         switch (idx) {
 309         default:
 310                 idx = 0;
 311                 /* fall through */
 312         case 0:
 313                 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
 314                 break;
 315         case 1:
 316                 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
 317                 break;
 318         case 2:
 319                 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
 320                 break;
 321         case 3:
 322                 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
 323                 break;
 324         case 4:
 325                 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
 326                 break;
 327         }
 328
 329         count = s3c2410_udc_write_packet(fifo_reg, req, ep->ep.maxpacket);
 330
 331         /* last packet is often short (sometimes a zlp) */
 332         if (count != ep->ep.maxpacket)
 333                 is_last = 1;
 334         else if (req->req.length != req->req.actual || req->req.zero)
 335                 is_last = 0;
 336         else
 337                 is_last = 2;
 338
 339         /* Only ep0 debug messages are interesting */
 340         if (idx == 0)
 341                 dprintk(DEBUG_NORMAL,
 342                         "Written ep%d %d.%d of %d b [last %d,z %d]\n",
 343                         idx, count, req->req.actual, req->req.length,
 344                         is_last, req->req.zero);
 345
 346         if (is_last) {
 347                 /* The order is important. It prevents sending 2 packets
 348                  * at the same time */
 349
 350                 if (idx == 0) {
 351                         /* Reset signal => no need to say 'data sent' */
 352                         if (!(udc_read(S3C2410_UDC_USB_INT_REG)
 353                                         & S3C2410_UDC_USBINT_RESET))
 354                                 s3c2410_udc_set_ep0_de_in(base_addr);
 355                         ep->dev->ep0state = EP0_IDLE;
 356                 } else {
 357                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 358                         ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 359                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 360                         udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
 361                                         S3C2410_UDC_IN_CSR1_REG);
 362                 }
 363
 364                 s3c2410_udc_done(ep, req, 0);
 365                 is_last = 1;
 366         } else {
 367                 if (idx == 0) {
 368                         /* Reset signal => no need to say 'data sent' */
 369                         if (!(udc_read(S3C2410_UDC_USB_INT_REG)
 370                                         & S3C2410_UDC_USBINT_RESET))
 371                                 s3c2410_udc_set_ep0_ipr(base_addr);
 372                 } else {
 373                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 374                         ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 375                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 376                         udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
 377                                         S3C2410_UDC_IN_CSR1_REG);
 378                 }
 379         }
 380
 381         return is_last;
 382 }
 383
 384 static inline int s3c2410_udc_read_packet(int fifo, u8 *buf,
 385                 struct s3c2410_request *req, unsigned avail)
 386 {
 387         unsigned len;
 388
 389         len = min(req->req.length - req->req.actual, avail);
 390         req->req.actual += len;
 391
 392         readsb(fifo + base_addr, buf, len);
 393         return len;
 394 }
 395
 396 /*
 397  * return:  0 = still running, 1 = queue empty, negative = errno
 398  */
 399 static int s3c2410_udc_read_fifo(struct s3c2410_ep *ep,
 400                                  struct s3c2410_request *req)
 401 {
 402         u8              *buf;
 403         u32             ep_csr;
 404         unsigned        bufferspace;
 405         int             is_last = 1;
 406         unsigned        avail;
 407         int             fifo_count = 0;
 408         u32             idx;
 409         int             fifo_reg;
 410
 411         idx = ep->bEndpointAddress & 0x7F;
 412
 413         switch (idx) {
 414         default:
 415                 idx = 0;
 416                 /* fall through */
 417         case 0:
 418                 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
 419                 break;
 420         case 1:
 421                 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
 422                 break;
 423         case 2:
 424                 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
 425                 break;
 426         case 3:
 427                 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
 428                 break;
 429         case 4:
 430                 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
 431                 break;
 432         }
 433
 434         if (!req->req.length)
 435                 return 1;
 436
 437         buf = req->req.buf + req->req.actual;
 438         bufferspace = req->req.length - req->req.actual;
 439         if (!bufferspace) {
 440                 dprintk(DEBUG_NORMAL, "%s: buffer full!\n", __func__);
 441                 return -1;
 442         }
 443
 444         udc_write(idx, S3C2410_UDC_INDEX_REG);
 445
 446         fifo_count = s3c2410_udc_fifo_count_out();
 447         dprintk(DEBUG_NORMAL, "%s fifo count : %d\n", __func__, fifo_count);
 448
 449         if (fifo_count > ep->ep.maxpacket)
 450                 avail = ep->ep.maxpacket;
 451         else
 452                 avail = fifo_count;
 453
 454         fifo_count = s3c2410_udc_read_packet(fifo_reg, buf, req, avail);
 455
 456         /* checking this with ep0 is not accurate as we already
 457          * read a control request
 458          **/
 459         if (idx != 0 && fifo_count < ep->ep.maxpacket) {
 460                 is_last = 1;
 461                 /* overflowed this request?  flush extra data */
 462                 if (fifo_count != avail)
 463                         req->req.status = -EOVERFLOW;
 464         } else {
 465                 is_last = (req->req.length <= req->req.actual) ? 1 : 0;
 466         }
 467
 468         udc_write(idx, S3C2410_UDC_INDEX_REG);
 469         fifo_count = s3c2410_udc_fifo_count_out();
 470
 471         /* Only ep0 debug messages are interesting */
 472         if (idx == 0)
 473                 dprintk(DEBUG_VERBOSE, "%s fifo count : %d [last %d]\n",
 474                         __func__, fifo_count, is_last);
 475
 476         if (is_last) {
 477                 if (idx == 0) {
 478                         s3c2410_udc_set_ep0_de_out(base_addr);
 479                         ep->dev->ep0state = EP0_IDLE;
 480                 } else {
 481                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 482                         ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 483                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 484                         udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
 485                                         S3C2410_UDC_OUT_CSR1_REG);
 486                 }
 487
 488                 s3c2410_udc_done(ep, req, 0);
 489         } else {
 490                 if (idx == 0) {
 491                         s3c2410_udc_clear_ep0_opr(base_addr);
 492                 } else {
 493                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 494                         ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 495                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 496                         udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
 497                                         S3C2410_UDC_OUT_CSR1_REG);
 498                 }
 499         }
 500
 501         return is_last;
 502 }
 503
 504 static int s3c2410_udc_read_fifo_crq(struct usb_ctrlrequest *crq)
 505 {
 506         unsigned char *outbuf = (unsigned char *)crq;
 507         int bytes_read = 0;
 508
 509         udc_write(0, S3C2410_UDC_INDEX_REG);
 510
 511         bytes_read = s3c2410_udc_fifo_count_out();
 512
 513         dprintk(DEBUG_NORMAL, "%s: fifo_count=%d\n", __func__, bytes_read);
 514
 515         if (bytes_read > sizeof(struct usb_ctrlrequest))
 516                 bytes_read = sizeof(struct usb_ctrlrequest);
 517
 518         readsb(S3C2410_UDC_EP0_FIFO_REG + base_addr, outbuf, bytes_read);
 519
 520         dprintk(DEBUG_VERBOSE, "%s: len=%d %02x:%02x {%x,%x,%x}\n", __func__,
 521                 bytes_read, crq->bRequest, crq->bRequestType,
 522                 crq->wValue, crq->wIndex, crq->wLength);
 523
 524         return bytes_read;
 525 }
 526
 527 static int s3c2410_udc_get_status(struct s3c2410_udc *dev,
 528                 struct usb_ctrlrequest *crq)
 529 {
 530         u16 status = 0;
 531         u8 ep_num = crq->wIndex & 0x7F;
 532         u8 is_in = crq->wIndex & USB_DIR_IN;
 533
 534         switch (crq->bRequestType & USB_RECIP_MASK) {
 535         case USB_RECIP_INTERFACE:
 536                 break;
 537
 538         case USB_RECIP_DEVICE:
 539                 status = dev->devstatus;
 540                 break;
 541
 542         case USB_RECIP_ENDPOINT:
 543                 if (ep_num > 4 || crq->wLength > 2)
 544                         return 1;
 545
 546                 if (ep_num == 0) {
 547                         udc_write(0, S3C2410_UDC_INDEX_REG);
 548                         status = udc_read(S3C2410_UDC_IN_CSR1_REG);
 549                         status = status & S3C2410_UDC_EP0_CSR_SENDSTL;
 550                 } else {
 551                         udc_write(ep_num, S3C2410_UDC_INDEX_REG);
 552                         if (is_in) {
 553                                 status = udc_read(S3C2410_UDC_IN_CSR1_REG);
 554                                 status = status & S3C2410_UDC_ICSR1_SENDSTL;
 555                         } else {
 556                                 status = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 557                                 status = status & S3C2410_UDC_OCSR1_SENDSTL;
 558                         }
 559                 }
 560
 561                 status = status ? 1 : 0;
 562                 break;
 563
 564         default:
 565                 return 1;
 566         }
 567
 568         /* Seems to be needed to get it working. ouch :( */
 569         udelay(5);
 570         udc_write(status & 0xFF, S3C2410_UDC_EP0_FIFO_REG);
 571         udc_write(status >> 8, S3C2410_UDC_EP0_FIFO_REG);
 572         s3c2410_udc_set_ep0_de_in(base_addr);
 573
 574         return 0;
 575 }
 576 /*------------------------- usb state machine -------------------------------*/
 577 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value);
 578
 579 static void s3c2410_udc_handle_ep0_idle(struct s3c2410_udc *dev,
 580                                         struct s3c2410_ep *ep,
 581                                         struct usb_ctrlrequest *crq,
 582                                         u32 ep0csr)
 583 {
 584         int len, ret, tmp;
 585
 586         /* start control request? */
 587         if (!(ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY))
 588                 return;
 589
 590         s3c2410_udc_nuke(dev, ep, -EPROTO);
 591
 592         len = s3c2410_udc_read_fifo_crq(crq);
 593         if (len != sizeof(*crq)) {
 594                 dprintk(DEBUG_NORMAL, "setup begin: fifo READ ERROR"
 595                         " wanted %d bytes got %d. Stalling out...\n",
 596                         sizeof(*crq), len);
 597                 s3c2410_udc_set_ep0_ss(base_addr);
 598                 return;
 599         }
 600
 601         dprintk(DEBUG_NORMAL, "bRequest = %d bRequestType %d wLength = %d\n",
 602                 crq->bRequest, crq->bRequestType, crq->wLength);
 603
 604         /* cope with automagic for some standard requests. */
 605         dev->req_std = (crq->bRequestType & USB_TYPE_MASK)
 606                 == USB_TYPE_STANDARD;
 607         dev->req_config = 0;
 608         dev->req_pending = 1;
 609
 610         switch (crq->bRequest) {
 611         case USB_REQ_SET_CONFIGURATION:
 612                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_CONFIGURATION ...\n");
 613
 614                 if (crq->bRequestType == USB_RECIP_DEVICE) {
 615                         dev->req_config = 1;
 616                         s3c2410_udc_set_ep0_de_out(base_addr);
 617                 }
 618                 break;
 619
 620         case USB_REQ_SET_INTERFACE:
 621                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_INTERFACE ...\n");
 622
 623                 if (crq->bRequestType == USB_RECIP_INTERFACE) {
 624                         dev->req_config = 1;
 625                         s3c2410_udc_set_ep0_de_out(base_addr);
 626                 }
 627                 break;
 628
 629         case USB_REQ_SET_ADDRESS:
 630                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_ADDRESS ...\n");
 631
 632                 if (crq->bRequestType == USB_RECIP_DEVICE) {
 633                         tmp = crq->wValue & 0x7F;
 634                         dev->address = tmp;
 635                         udc_write((tmp | S3C2410_UDC_FUNCADDR_UPDATE),
 636                                         S3C2410_UDC_FUNC_ADDR_REG);
 637                         s3c2410_udc_set_ep0_de_out(base_addr);
 638                         return;
 639                 }
 640                 break;
 641
 642         case USB_REQ_GET_STATUS:
 643                 dprintk(DEBUG_NORMAL, "USB_REQ_GET_STATUS ...\n");
 644                 s3c2410_udc_clear_ep0_opr(base_addr);
 645
 646                 if (dev->req_std) {
 647                         if (!s3c2410_udc_get_status(dev, crq))
 648                                 return;
 649                 }
 650                 break;
 651
 652         case USB_REQ_CLEAR_FEATURE:
 653                 s3c2410_udc_clear_ep0_opr(base_addr);
 654
 655                 if (crq->bRequestType != USB_RECIP_ENDPOINT)
 656                         break;
 657
 658                 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
 659                         break;
 660
 661                 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 0);
 662                 s3c2410_udc_set_ep0_de_out(base_addr);
 663                 return;
 664
 665         case USB_REQ_SET_FEATURE:
 666                 s3c2410_udc_clear_ep0_opr(base_addr);
 667
 668                 if (crq->bRequestType != USB_RECIP_ENDPOINT)
 669                         break;
 670
 671                 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
 672                         break;
 673
 674                 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 1);
 675                 s3c2410_udc_set_ep0_de_out(base_addr);
 676                 return;
 677
 678         default:
 679                 s3c2410_udc_clear_ep0_opr(base_addr);
 680                 break;
 681         }
 682
 683         if (crq->bRequestType & USB_DIR_IN)
 684                 dev->ep0state = EP0_IN_DATA_PHASE;
 685         else
 686                 dev->ep0state = EP0_OUT_DATA_PHASE;
 687
 688         if (!dev->driver)
 689                 return;
 690
 691         /* deliver the request to the gadget driver */
 692         ret = dev->driver->setup(&dev->gadget, crq);
 693         if (ret < 0) {
 694                 if (dev->req_config) {
 695                         dprintk(DEBUG_NORMAL, "config change %02x fail %d?\n",
 696                                 crq->bRequest, ret);
 697                         return;
 698                 }
 699
 700                 if (ret == -EOPNOTSUPP)
 701                         dprintk(DEBUG_NORMAL, "Operation not supported\n");
 702                 else
 703                         dprintk(DEBUG_NORMAL,
 704                                 "dev->driver->setup failed. (%d)\n", ret);
 705
 706                 udelay(5);
 707                 s3c2410_udc_set_ep0_ss(base_addr);
 708                 s3c2410_udc_set_ep0_de_out(base_addr);
 709                 dev->ep0state = EP0_IDLE;
 710                 /* deferred i/o == no response yet */
 711         } else if (dev->req_pending) {
 712                 dprintk(DEBUG_VERBOSE, "dev->req_pending... what now?\n");
 713                 dev->req_pending = 0;
 714         }
 715
 716         dprintk(DEBUG_VERBOSE, "ep0state %s\n", ep0states[dev->ep0state]);
 717 }
 718
 719 static void s3c2410_udc_handle_ep0(struct s3c2410_udc *dev)
 720 {
 721         u32                     ep0csr;
 722         struct s3c2410_ep       *ep = &dev->ep[0];
 723         struct s3c2410_request  *req;
 724         struct usb_ctrlrequest  crq;
 725
 726         if (list_empty(&ep->queue))
 727                 req = NULL;
 728         else
 729                 req = list_entry(ep->queue.next, struct s3c2410_request, queue);
 730
 731         /* We make the assumption that S3C2410_UDC_IN_CSR1_REG equal to
 732          * S3C2410_UDC_EP0_CSR_REG when index is zero */
 733
 734         udc_write(0, S3C2410_UDC_INDEX_REG);
 735         ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 736
 737         dprintk(DEBUG_NORMAL, "ep0csr %x ep0state %s\n",
 738                 ep0csr, ep0states[dev->ep0state]);
 739
 740         /* clear stall status */
 741         if (ep0csr & S3C2410_UDC_EP0_CSR_SENTSTL) {
 742                 s3c2410_udc_nuke(dev, ep, -EPIPE);
 743                 dprintk(DEBUG_NORMAL, "... clear SENT_STALL ...\n");
 744                 s3c2410_udc_clear_ep0_sst(base_addr);
 745                 dev->ep0state = EP0_IDLE;
 746                 return;
 747         }
 748
 749         /* clear setup end */
 750         if (ep0csr & S3C2410_UDC_EP0_CSR_SE) {
 751                 dprintk(DEBUG_NORMAL, "... serviced SETUP_END ...\n");
 752                 s3c2410_udc_nuke(dev, ep, 0);
 753                 s3c2410_udc_clear_ep0_se(base_addr);
 754                 dev->ep0state = EP0_IDLE;
 755         }
 756
 757         switch (dev->ep0state) {
 758         case EP0_IDLE:
 759                 s3c2410_udc_handle_ep0_idle(dev, ep, &crq, ep0csr);
 760                 break;
 761
 762         case EP0_IN_DATA_PHASE:                 /* GET_DESCRIPTOR etc */
 763                 dprintk(DEBUG_NORMAL, "EP0_IN_DATA_PHASE ... what now?\n");
 764                 if (!(ep0csr & S3C2410_UDC_EP0_CSR_IPKRDY) && req)
 765                         s3c2410_udc_write_fifo(ep, req);
 766                 break;
 767
 768         case EP0_OUT_DATA_PHASE:                /* SET_DESCRIPTOR etc */
 769                 dprintk(DEBUG_NORMAL, "EP0_OUT_DATA_PHASE ... what now?\n");
 770                 if ((ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY) && req)
 771                         s3c2410_udc_read_fifo(ep, req);
 772                 break;
 773
 774         case EP0_END_XFER:
 775                 dprintk(DEBUG_NORMAL, "EP0_END_XFER ... what now?\n");
 776                 dev->ep0state = EP0_IDLE;
 777                 break;
 778
 779         case EP0_STALL:
 780                 dprintk(DEBUG_NORMAL, "EP0_STALL ... what now?\n");
 781                 dev->ep0state = EP0_IDLE;
 782                 break;
 783         }
 784 }
 785
 786 /*
 787  *      handle_ep - Manage I/O endpoints
 788  */
 789
 790 static void s3c2410_udc_handle_ep(struct s3c2410_ep *ep)
 791 {
 792         struct s3c2410_request  *req;
 793         int                     is_in = ep->bEndpointAddress & USB_DIR_IN;
 794         u32                     ep_csr1;
 795         u32                     idx;
 796
 797         if (likely(!list_empty(&ep->queue)))
 798                 req = list_entry(ep->queue.next,
 799                                 struct s3c2410_request, queue);
 800         else
 801                 req = NULL;
 802
 803         idx = ep->bEndpointAddress & 0x7F;
 804
 805         if (is_in) {
 806                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 807                 ep_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
 808                 dprintk(DEBUG_VERBOSE, "ep%01d write csr:%02x %d\n",
 809                         idx, ep_csr1, req ? 1 : 0);
 810
 811                 if (ep_csr1 & S3C2410_UDC_ICSR1_SENTSTL) {
 812                         dprintk(DEBUG_VERBOSE, "st\n");
 813                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 814                         udc_write(ep_csr1 & ~S3C2410_UDC_ICSR1_SENTSTL,
 815                                         S3C2410_UDC_IN_CSR1_REG);
 816                         return;
 817                 }
 818
 819                 if (!(ep_csr1 & S3C2410_UDC_ICSR1_PKTRDY) && req)
 820                         s3c2410_udc_write_fifo(ep, req);
 821         } else {
 822                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 823                 ep_csr1 = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 824                 dprintk(DEBUG_VERBOSE, "ep%01d rd csr:%02x\n", idx, ep_csr1);
 825
 826                 if (ep_csr1 & S3C2410_UDC_OCSR1_SENTSTL) {
 827                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 828                         udc_write(ep_csr1 & ~S3C2410_UDC_OCSR1_SENTSTL,
 829                                         S3C2410_UDC_OUT_CSR1_REG);
 830                         return;
 831                 }
 832
 833                 if ((ep_csr1 & S3C2410_UDC_OCSR1_PKTRDY) && req)
 834                         s3c2410_udc_read_fifo(ep, req);
 835         }
 836 }
 837
 838 #include <mach/regs-irq.h>
 839
 840 /*
 841  *      s3c2410_udc_irq - interrupt handler
 842  */
 843 static irqreturn_t s3c2410_udc_irq(int dummy, void *_dev)
 844 {
 845         struct s3c2410_udc *dev = _dev;
 846         int usb_status;
 847         int usbd_status;
 848         int pwr_reg;
 849         int ep0csr;
 850         int i;
 851         u32 idx, idx2;
 852         unsigned long flags;
 853
 854         spin_lock_irqsave(&dev->lock, flags);
 855
 856         /* Driver connected ? */
 857         if (!dev->driver) {
 858                 /* Clear interrupts */
 859                 udc_write(udc_read(S3C2410_UDC_USB_INT_REG),
 860                                 S3C2410_UDC_USB_INT_REG);
 861                 udc_write(udc_read(S3C2410_UDC_EP_INT_REG),
 862                                 S3C2410_UDC_EP_INT_REG);
 863         }
 864
 865         /* Save index */
 866         idx = udc_read(S3C2410_UDC_INDEX_REG);
 867
 868         /* Read status registers */
 869         usb_status = udc_read(S3C2410_UDC_USB_INT_REG);
 870         usbd_status = udc_read(S3C2410_UDC_EP_INT_REG);
 871         pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
 872
 873         udc_writeb(base_addr, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 874         ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 875
 876         dprintk(DEBUG_NORMAL, "usbs=%02x, usbds=%02x, pwr=%02x ep0csr=%02x\n",
 877                 usb_status, usbd_status, pwr_reg, ep0csr);
 878
 879         /*
 880          * Now, handle interrupts. There's two types :
 881          * - Reset, Resume, Suspend coming -> usb_int_reg
 882          * - EP -> ep_int_reg
 883          */
 884
 885         /* RESET */
 886         if (usb_status & S3C2410_UDC_USBINT_RESET) {
 887                 /* two kind of reset :
 888                  * - reset start -> pwr reg = 8
 889                  * - reset end   -> pwr reg = 0
 890                  **/
 891                 dprintk(DEBUG_NORMAL, "USB reset csr %x pwr %x\n",
 892                         ep0csr, pwr_reg);
 893
 894                 dev->gadget.speed = USB_SPEED_UNKNOWN;
 895                 udc_write(0x00, S3C2410_UDC_INDEX_REG);
 896                 udc_write((dev->ep[0].ep.maxpacket & 0x7ff) >> 3,
 897                                 S3C2410_UDC_MAXP_REG);
 898                 dev->address = 0;
 899
 900                 dev->ep0state = EP0_IDLE;
 901                 dev->gadget.speed = USB_SPEED_FULL;
 902
 903                 /* clear interrupt */
 904                 udc_write(S3C2410_UDC_USBINT_RESET,
 905                                 S3C2410_UDC_USB_INT_REG);
 906
 907                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 908                 spin_unlock_irqrestore(&dev->lock, flags);
 909                 return IRQ_HANDLED;
 910         }
 911
 912         /* RESUME */
 913         if (usb_status & S3C2410_UDC_USBINT_RESUME) {
 914                 dprintk(DEBUG_NORMAL, "USB resume\n");
 915
 916                 /* clear interrupt */
 917                 udc_write(S3C2410_UDC_USBINT_RESUME,
 918                                 S3C2410_UDC_USB_INT_REG);
 919
 920                 if (dev->gadget.speed != USB_SPEED_UNKNOWN
 921                                 && dev->driver
 922                                 && dev->driver->resume)
 923                         dev->driver->resume(&dev->gadget);
 924         }
 925
 926         /* SUSPEND */
 927         if (usb_status & S3C2410_UDC_USBINT_SUSPEND) {
 928                 dprintk(DEBUG_NORMAL, "USB suspend\n");
 929
 930                 /* clear interrupt */
 931                 udc_write(S3C2410_UDC_USBINT_SUSPEND,
 932                                 S3C2410_UDC_USB_INT_REG);
 933
 934                 if (dev->gadget.speed != USB_SPEED_UNKNOWN
 935                                 && dev->driver
 936                                 && dev->driver->suspend)
 937                         dev->driver->suspend(&dev->gadget);
 938
 939                 dev->ep0state = EP0_IDLE;
 940         }
 941
 942         /* EP */
 943         /* control traffic */
 944         /* check on ep0csr != 0 is not a good idea as clearing in_pkt_ready
 945          * generate an interrupt
 946          */
 947         if (usbd_status & S3C2410_UDC_INT_EP0) {
 948                 dprintk(DEBUG_VERBOSE, "USB ep0 irq\n");
 949                 /* Clear the interrupt bit by setting it to 1 */
 950                 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_REG);
 951                 s3c2410_udc_handle_ep0(dev);
 952         }
 953
 954         /* endpoint data transfers */
 955         for (i = 1; i < S3C2410_ENDPOINTS; i++) {
 956                 u32 tmp = 1 << i;
 957                 if (usbd_status & tmp) {
 958                         dprintk(DEBUG_VERBOSE, "USB ep%d irq\n", i);
 959
 960                         /* Clear the interrupt bit by setting it to 1 */
 961                         udc_write(tmp, S3C2410_UDC_EP_INT_REG);
 962                         s3c2410_udc_handle_ep(&dev->ep[i]);
 963                 }
 964         }
 965
 966         /* what else causes this interrupt? a receive! who is it? */
 967         if (!usb_status && !usbd_status && !pwr_reg && !ep0csr) {
 968                 for (i = 1; i < S3C2410_ENDPOINTS; i++) {
 969                         idx2 = udc_read(S3C2410_UDC_INDEX_REG);
 970                         udc_write(i, S3C2410_UDC_INDEX_REG);
 971
 972                         if (udc_read(S3C2410_UDC_OUT_CSR1_REG) & 0x1)
 973                                 s3c2410_udc_handle_ep(&dev->ep[i]);
 974
 975                         /* restore index */
 976                         udc_write(idx2, S3C2410_UDC_INDEX_REG);
 977                 }
 978         }
 979
 980         dprintk(DEBUG_VERBOSE, "irq: %d s3c2410_udc_done.\n", IRQ_USBD);
 981
 982         /* Restore old index */
 983         udc_write(idx, S3C2410_UDC_INDEX_REG);
 984
 985         spin_unlock_irqrestore(&dev->lock, flags);
 986
 987         return IRQ_HANDLED;
 988 }
 989 /*------------------------- s3c2410_ep_ops ----------------------------------*/
 990
 991 static inline struct s3c2410_ep *to_s3c2410_ep(struct usb_ep *ep)
 992 {
 993         return container_of(ep, struct s3c2410_ep, ep);
 994 }
 995
 996 static inline struct s3c2410_udc *to_s3c2410_udc(struct usb_gadget *gadget)
 997 {
 998         return container_of(gadget, struct s3c2410_udc, gadget);
 999 }
1000
1001 static inline struct s3c2410_request *to_s3c2410_req(struct usb_request *req)
1002 {
1003         return container_of(req, struct s3c2410_request, req);
1004 }
1005
1006 /*
1007  *      s3c2410_udc_ep_enable
1008  */
1009 static int s3c2410_udc_ep_enable(struct usb_ep *_ep,
1010                                  const struct usb_endpoint_descriptor *desc)
1011 {
1012         struct s3c2410_udc      *dev;
1013         struct s3c2410_ep       *ep;
1014         u32                     max, tmp;
1015         unsigned long           flags;
1016         u32                     csr1, csr2;
1017         u32                     int_en_reg;
1018
1019         ep = to_s3c2410_ep(_ep);
1020
1021         if (!_ep || !desc
1022                         || _ep->name == ep0name
1023                         || desc->bDescriptorType != USB_DT_ENDPOINT)
1024                 return -EINVAL;
1025
1026         dev = ep->dev;
1027         if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
1028                 return -ESHUTDOWN;
1029
1030         max = usb_endpoint_maxp(desc);
1031
1032         local_irq_save(flags);
1033         _ep->maxpacket = max;
1034         ep->ep.desc = desc;
1035         ep->halted = 0;
1036         ep->bEndpointAddress = desc->bEndpointAddress;
1037
1038         /* set max packet */
1039         udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1040         udc_write(max >> 3, S3C2410_UDC_MAXP_REG);
1041
1042         /* set type, direction, address; reset fifo counters */
1043         if (desc->bEndpointAddress & USB_DIR_IN) {
1044                 csr1 = S3C2410_UDC_ICSR1_FFLUSH|S3C2410_UDC_ICSR1_CLRDT;
1045                 csr2 = S3C2410_UDC_ICSR2_MODEIN|S3C2410_UDC_ICSR2_DMAIEN;
1046
1047                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1048                 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1049                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1050                 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1051         } else {
1052                 /* don't flush in fifo or it will cause endpoint interrupt */
1053                 csr1 = S3C2410_UDC_ICSR1_CLRDT;
1054                 csr2 = S3C2410_UDC_ICSR2_DMAIEN;
1055
1056                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1057                 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1058                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1059                 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1060
1061                 csr1 = S3C2410_UDC_OCSR1_FFLUSH | S3C2410_UDC_OCSR1_CLRDT;
1062                 csr2 = S3C2410_UDC_OCSR2_DMAIEN;
1063
1064                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1065                 udc_write(csr1, S3C2410_UDC_OUT_CSR1_REG);
1066                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1067                 udc_write(csr2, S3C2410_UDC_OUT_CSR2_REG);
1068         }
1069
1070         /* enable irqs */
1071         int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1072         udc_write(int_en_reg | (1 << ep->num), S3C2410_UDC_EP_INT_EN_REG);
1073
1074         /* print some debug message */
1075         tmp = desc->bEndpointAddress;
1076         dprintk(DEBUG_NORMAL, "enable %s(%d) ep%x%s-blk max %02x\n",
1077                  _ep->name, ep->num, tmp,
1078                  desc->bEndpointAddress & USB_DIR_IN ? "in" : "out", max);
1079
1080         local_irq_restore(flags);
1081         s3c2410_udc_set_halt(_ep, 0);
1082
1083         return 0;
1084 }
1085
1086 /*
1087  * s3c2410_udc_ep_disable
1088  */
1089 static int s3c2410_udc_ep_disable(struct usb_ep *_ep)
1090 {
1091         struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1092         unsigned long flags;
1093         u32 int_en_reg;
1094
1095         if (!_ep || !ep->ep.desc) {
1096                 dprintk(DEBUG_NORMAL, "%s not enabled\n",
1097                         _ep ? ep->ep.name : NULL);
1098                 return -EINVAL;
1099         }
1100
1101         local_irq_save(flags);
1102
1103         dprintk(DEBUG_NORMAL, "ep_disable: %s\n", _ep->name);
1104
1105         ep->ep.desc = NULL;
1106         ep->halted = 1;
1107
1108         s3c2410_udc_nuke(ep->dev, ep, -ESHUTDOWN);
1109
1110         /* disable irqs */
1111         int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1112         udc_write(int_en_reg & ~(1<<ep->num), S3C2410_UDC_EP_INT_EN_REG);
1113
1114         local_irq_restore(flags);
1115
1116         dprintk(DEBUG_NORMAL, "%s disabled\n", _ep->name);
1117
1118         return 0;
1119 }
1120
1121 /*
1122  * s3c2410_udc_alloc_request
1123  */
1124 static struct usb_request *
1125 s3c2410_udc_alloc_request(struct usb_ep *_ep, gfp_t mem_flags)
1126 {
1127         struct s3c2410_request *req;
1128
1129         dprintk(DEBUG_VERBOSE, "%s(%p,%d)\n", __func__, _ep, mem_flags);
1130
1131         if (!_ep)
1132                 return NULL;
1133
1134         req = kzalloc(sizeof(struct s3c2410_request), mem_flags);
1135         if (!req)
1136                 return NULL;
1137
1138         INIT_LIST_HEAD(&req->queue);
1139         return &req->req;
1140 }
1141
1142 /*
1143  * s3c2410_udc_free_request
1144  */
1145 static void
1146 s3c2410_udc_free_request(struct usb_ep *_ep, struct usb_request *_req)
1147 {
1148         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1149         struct s3c2410_request  *req = to_s3c2410_req(_req);
1150
1151         dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1152
1153         if (!ep || !_req || (!ep->ep.desc && _ep->name != ep0name))
1154                 return;
1155
1156         WARN_ON(!list_empty(&req->queue));
1157         kfree(req);
1158 }
1159
1160 /*
1161  *      s3c2410_udc_queue
1162  */
1163 static int s3c2410_udc_queue(struct usb_ep *_ep, struct usb_request *_req,
1164                 gfp_t gfp_flags)
1165 {
1166         struct s3c2410_request  *req = to_s3c2410_req(_req);
1167         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1168         struct s3c2410_udc      *dev;
1169         u32                     ep_csr = 0;
1170         int                     fifo_count = 0;
1171         unsigned long           flags;
1172
1173         if (unlikely(!_ep || (!ep->ep.desc && ep->ep.name != ep0name))) {
1174                 dprintk(DEBUG_NORMAL, "%s: invalid args\n", __func__);
1175                 return -EINVAL;
1176         }
1177
1178         dev = ep->dev;
1179         if (unlikely(!dev->driver
1180                         || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
1181                 return -ESHUTDOWN;
1182         }
1183
1184         local_irq_save(flags);
1185
1186         if (unlikely(!_req || !_req->complete
1187                         || !_req->buf || !list_empty(&req->queue))) {
1188                 if (!_req)
1189                         dprintk(DEBUG_NORMAL, "%s: 1 X X X\n", __func__);
1190                 else {
1191                         dprintk(DEBUG_NORMAL, "%s: 0 %01d %01d %01d\n",
1192                                 __func__, !_req->complete, !_req->buf,
1193                                 !list_empty(&req->queue));
1194                 }
1195
1196                 local_irq_restore(flags);
1197                 return -EINVAL;
1198         }
1199
1200         _req->status = -EINPROGRESS;
1201         _req->actual = 0;
1202
1203         dprintk(DEBUG_VERBOSE, "%s: ep%x len %d\n",
1204                  __func__, ep->bEndpointAddress, _req->length);
1205
1206         if (ep->bEndpointAddress) {
1207                 udc_write(ep->bEndpointAddress & 0x7F, S3C2410_UDC_INDEX_REG);
1208
1209                 ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
1210                                 ? S3C2410_UDC_IN_CSR1_REG
1211                                 : S3C2410_UDC_OUT_CSR1_REG);
1212                 fifo_count = s3c2410_udc_fifo_count_out();
1213         } else {
1214                 udc_write(0, S3C2410_UDC_INDEX_REG);
1215                 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
1216                 fifo_count = s3c2410_udc_fifo_count_out();
1217         }
1218
1219         /* kickstart this i/o queue? */
1220         if (list_empty(&ep->queue) && !ep->halted) {
1221                 if (ep->bEndpointAddress == 0 /* ep0 */) {
1222                         switch (dev->ep0state) {
1223                         case EP0_IN_DATA_PHASE:
1224                                 if (!(ep_csr&S3C2410_UDC_EP0_CSR_IPKRDY)
1225                                                 && s3c2410_udc_write_fifo(ep,
1226                                                         req)) {
1227                                         dev->ep0state = EP0_IDLE;
1228                                         req = NULL;
1229                                 }
1230                                 break;
1231
1232                         case EP0_OUT_DATA_PHASE:
1233                                 if ((!_req->length)
1234                                         || ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1235                                                 && s3c2410_udc_read_fifo(ep,
1236                                                         req))) {
1237                                         dev->ep0state = EP0_IDLE;
1238                                         req = NULL;
1239                                 }
1240                                 break;
1241
1242                         default:
1243                                 local_irq_restore(flags);
1244                                 return -EL2HLT;
1245                         }
1246                 } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0
1247                                 && (!(ep_csr&S3C2410_UDC_OCSR1_PKTRDY))
1248                                 && s3c2410_udc_write_fifo(ep, req)) {
1249                         req = NULL;
1250                 } else if ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1251                                 && fifo_count
1252                                 && s3c2410_udc_read_fifo(ep, req)) {
1253                         req = NULL;
1254                 }
1255         }
1256
1257         /* pio or dma irq handler advances the queue. */
1258         if (likely(req))
1259                 list_add_tail(&req->queue, &ep->queue);
1260
1261         local_irq_restore(flags);
1262
1263         dprintk(DEBUG_VERBOSE, "%s ok\n", __func__);
1264         return 0;
1265 }
1266
1267 /*
1268  *      s3c2410_udc_dequeue
1269  */
1270 static int s3c2410_udc_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1271 {
1272         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1273         struct s3c2410_udc      *udc;
1274         int                     retval = -EINVAL;
1275         unsigned long           flags;
1276         struct s3c2410_request  *req = NULL;
1277
1278         dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1279
1280         if (!the_controller->driver)
1281                 return -ESHUTDOWN;
1282
1283         if (!_ep || !_req)
1284                 return retval;
1285
1286         udc = to_s3c2410_udc(ep->gadget);
1287
1288         local_irq_save(flags);
1289
1290         list_for_each_entry(req, &ep->queue, queue) {
1291                 if (&req->req == _req) {
1292                         list_del_init(&req->queue);
1293                         _req->status = -ECONNRESET;
1294                         retval = 0;
1295                         break;
1296                 }
1297         }
1298
1299         if (retval == 0) {
1300                 dprintk(DEBUG_VERBOSE,
1301                         "dequeued req %p from %s, len %d buf %p\n",
1302                         req, _ep->name, _req->length, _req->buf);
1303
1304                 s3c2410_udc_done(ep, req, -ECONNRESET);
1305         }
1306
1307         local_irq_restore(flags);
1308         return retval;
1309 }
1310
1311 /*
1312  * s3c2410_udc_set_halt
1313  */
1314 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value)
1315 {
1316         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1317         u32                     ep_csr = 0;
1318         unsigned long           flags;
1319         u32                     idx;
1320
1321         if (unlikely(!_ep || (!ep->ep.desc && ep->ep.name != ep0name))) {
1322                 dprintk(DEBUG_NORMAL, "%s: inval 2\n", __func__);
1323                 return -EINVAL;
1324         }
1325
1326         local_irq_save(flags);
1327
1328         idx = ep->bEndpointAddress & 0x7F;
1329
1330         if (idx == 0) {
1331                 s3c2410_udc_set_ep0_ss(base_addr);
1332                 s3c2410_udc_set_ep0_de_out(base_addr);
1333         } else {
1334                 udc_write(idx, S3C2410_UDC_INDEX_REG);
1335                 ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
1336                                 ? S3C2410_UDC_IN_CSR1_REG
1337                                 : S3C2410_UDC_OUT_CSR1_REG);
1338
1339                 if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
1340                         if (value)
1341                                 udc_write(ep_csr | S3C2410_UDC_ICSR1_SENDSTL,
1342                                         S3C2410_UDC_IN_CSR1_REG);
1343                         else {
1344                                 ep_csr &= ~S3C2410_UDC_ICSR1_SENDSTL;
1345                                 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1346                                 ep_csr |= S3C2410_UDC_ICSR1_CLRDT;
1347                                 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1348                         }
1349                 } else {
1350                         if (value)
1351                                 udc_write(ep_csr | S3C2410_UDC_OCSR1_SENDSTL,
1352                                         S3C2410_UDC_OUT_CSR1_REG);
1353                         else {
1354                                 ep_csr &= ~S3C2410_UDC_OCSR1_SENDSTL;
1355                                 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1356                                 ep_csr |= S3C2410_UDC_OCSR1_CLRDT;
1357                                 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1358                         }
1359                 }
1360         }
1361
1362         ep->halted = value ? 1 : 0;
1363         local_irq_restore(flags);
1364
1365         return 0;
1366 }
1367
1368 static const struct usb_ep_ops s3c2410_ep_ops = {
1369         .enable         = s3c2410_udc_ep_enable,
1370         .disable        = s3c2410_udc_ep_disable,
1371
1372         .alloc_request  = s3c2410_udc_alloc_request,
1373         .free_request   = s3c2410_udc_free_request,
1374
1375         .queue          = s3c2410_udc_queue,
1376         .dequeue        = s3c2410_udc_dequeue,
1377
1378         .set_halt       = s3c2410_udc_set_halt,
1379 };
1380
1381 /*------------------------- usb_gadget_ops ----------------------------------*/
1382
1383 /*
1384  *      s3c2410_udc_get_frame
1385  */
1386 static int s3c2410_udc_get_frame(struct usb_gadget *_gadget)
1387 {
1388         int tmp;
1389
1390         dprintk(DEBUG_VERBOSE, "%s()\n", __func__);
1391
1392         tmp = udc_read(S3C2410_UDC_FRAME_NUM2_REG) << 8;
1393         tmp |= udc_read(S3C2410_UDC_FRAME_NUM1_REG);
1394         return tmp;
1395 }
1396
1397 /*
1398  *      s3c2410_udc_wakeup
1399  */
1400 static int s3c2410_udc_wakeup(struct usb_gadget *_gadget)
1401 {
1402         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1403         return 0;
1404 }
1405
1406 /*
1407  *      s3c2410_udc_set_selfpowered
1408  */
1409 static int s3c2410_udc_set_selfpowered(struct usb_gadget *gadget, int value)
1410 {
1411         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1412
1413         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1414
1415         gadget->is_selfpowered = (value != 0);
1416         if (value)
1417                 udc->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
1418         else
1419                 udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
1420
1421         return 0;
1422 }
1423
1424 static void s3c2410_udc_disable(struct s3c2410_udc *dev);
1425 static void s3c2410_udc_enable(struct s3c2410_udc *dev);
1426
1427 static int s3c2410_udc_set_pullup(struct s3c2410_udc *udc, int is_on)
1428 {
1429         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1430
1431         if (udc_info && (udc_info->udc_command ||
1432                 gpio_is_valid(udc_info->pullup_pin))) {
1433
1434                 if (is_on)
1435                         s3c2410_udc_enable(udc);
1436                 else {
1437                         if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
1438                                 if (udc->driver && udc->driver->disconnect)
1439                                         udc->driver->disconnect(&udc->gadget);
1440
1441                         }
1442                         s3c2410_udc_disable(udc);
1443                 }
1444         } else {
1445                 return -EOPNOTSUPP;
1446         }
1447
1448         return 0;
1449 }
1450
1451 static int s3c2410_udc_vbus_session(struct usb_gadget *gadget, int is_active)
1452 {
1453         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1454
1455         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1456
1457         udc->vbus = (is_active != 0);
1458         s3c2410_udc_set_pullup(udc, is_active);
1459         return 0;
1460 }
1461
1462 static int s3c2410_udc_pullup(struct usb_gadget *gadget, int is_on)
1463 {
1464         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1465
1466         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1467
1468         s3c2410_udc_set_pullup(udc, is_on);
1469         return 0;
1470 }
1471
1472 static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev)
1473 {
1474         struct s3c2410_udc      *dev = _dev;
1475         unsigned int            value;
1476
1477         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1478
1479         value = gpio_get_value(udc_info->vbus_pin) ? 1 : 0;
1480         if (udc_info->vbus_pin_inverted)
1481                 value = !value;
1482
1483         if (value != dev->vbus)
1484                 s3c2410_udc_vbus_session(&dev->gadget, value);
1485
1486         return IRQ_HANDLED;
1487 }
1488
1489 static int s3c2410_vbus_draw(struct usb_gadget *_gadget, unsigned ma)
1490 {
1491         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1492
1493         if (udc_info && udc_info->vbus_draw) {
1494                 udc_info->vbus_draw(ma);
1495                 return 0;
1496         }
1497
1498         return -ENOTSUPP;
1499 }
1500
1501 static int s3c2410_udc_start(struct usb_gadget *g,
1502                 struct usb_gadget_driver *driver);
1503 static int s3c2410_udc_stop(struct usb_gadget *g);
1504
1505 static const struct usb_gadget_ops s3c2410_ops = {
1506         .get_frame              = s3c2410_udc_get_frame,
1507         .wakeup                 = s3c2410_udc_wakeup,
1508         .set_selfpowered        = s3c2410_udc_set_selfpowered,
1509         .pullup                 = s3c2410_udc_pullup,
1510         .vbus_session           = s3c2410_udc_vbus_session,
1511         .vbus_draw              = s3c2410_vbus_draw,
1512         .udc_start              = s3c2410_udc_start,
1513         .udc_stop               = s3c2410_udc_stop,
1514 };
1515
1516 static void s3c2410_udc_command(enum s3c2410_udc_cmd_e cmd)
1517 {
1518         if (!udc_info)
1519                 return;
1520
1521         if (udc_info->udc_command) {
1522                 udc_info->udc_command(cmd);
1523         } else if (gpio_is_valid(udc_info->pullup_pin)) {
1524                 int value;
1525
1526                 switch (cmd) {
1527                 case S3C2410_UDC_P_ENABLE:
1528                         value = 1;
1529                         break;
1530                 case S3C2410_UDC_P_DISABLE:
1531                         value = 0;
1532                         break;
1533                 default:
1534                         return;
1535                 }
1536                 value ^= udc_info->pullup_pin_inverted;
1537
1538                 gpio_set_value(udc_info->pullup_pin, value);
1539         }
1540 }
1541
1542 /*------------------------- gadget driver handling---------------------------*/
1543 /*
1544  * s3c2410_udc_disable
1545  */
1546 static void s3c2410_udc_disable(struct s3c2410_udc *dev)
1547 {
1548         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1549
1550         /* Disable all interrupts */
1551         udc_write(0x00, S3C2410_UDC_USB_INT_EN_REG);
1552         udc_write(0x00, S3C2410_UDC_EP_INT_EN_REG);
1553
1554         /* Clear the interrupt registers */
1555         udc_write(S3C2410_UDC_USBINT_RESET
1556                                 | S3C2410_UDC_USBINT_RESUME
1557                                 | S3C2410_UDC_USBINT_SUSPEND,
1558                         S3C2410_UDC_USB_INT_REG);
1559
1560         udc_write(0x1F, S3C2410_UDC_EP_INT_REG);
1561
1562         /* Good bye, cruel world */
1563         s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
1564
1565         /* Set speed to unknown */
1566         dev->gadget.speed = USB_SPEED_UNKNOWN;
1567 }
1568
1569 /*
1570  * s3c2410_udc_reinit
1571  */
1572 static void s3c2410_udc_reinit(struct s3c2410_udc *dev)
1573 {
1574         u32 i;
1575
1576         /* device/ep0 records init */
1577         INIT_LIST_HEAD(&dev->gadget.ep_list);
1578         INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
1579         dev->ep0state = EP0_IDLE;
1580
1581         for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1582                 struct s3c2410_ep *ep = &dev->ep[i];
1583
1584                 if (i != 0)
1585                         list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
1586
1587                 ep->dev = dev;
1588                 ep->ep.desc = NULL;
1589                 ep->halted = 0;
1590                 INIT_LIST_HEAD(&ep->queue);
1591                 usb_ep_set_maxpacket_limit(&ep->ep, ep->ep.maxpacket);
1592         }
1593 }
1594
1595 /*
1596  * s3c2410_udc_enable
1597  */
1598 static void s3c2410_udc_enable(struct s3c2410_udc *dev)
1599 {
1600         int i;
1601
1602         dprintk(DEBUG_NORMAL, "s3c2410_udc_enable called\n");
1603
1604         /* dev->gadget.speed = USB_SPEED_UNKNOWN; */
1605         dev->gadget.speed = USB_SPEED_FULL;
1606
1607         /* Set MAXP for all endpoints */
1608         for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1609                 udc_write(i, S3C2410_UDC_INDEX_REG);
1610                 udc_write((dev->ep[i].ep.maxpacket & 0x7ff) >> 3,
1611                                 S3C2410_UDC_MAXP_REG);
1612         }
1613
1614         /* Set default power state */
1615         udc_write(DEFAULT_POWER_STATE, S3C2410_UDC_PWR_REG);
1616
1617         /* Enable reset and suspend interrupt interrupts */
1618         udc_write(S3C2410_UDC_USBINT_RESET | S3C2410_UDC_USBINT_SUSPEND,
1619                         S3C2410_UDC_USB_INT_EN_REG);
1620
1621         /* Enable ep0 interrupt */
1622         udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_EN_REG);
1623
1624         /* time to say "hello, world" */
1625         s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
1626 }
1627
1628 static int s3c2410_udc_start(struct usb_gadget *g,
1629                 struct usb_gadget_driver *driver)
1630 {
1631         struct s3c2410_udc *udc = to_s3c2410(g);
1632
1633         dprintk(DEBUG_NORMAL, "%s() '%s'\n", __func__, driver->driver.name);
1634
1635         /* Hook the driver */
1636         udc->driver = driver;
1637
1638         /* Enable udc */
1639         s3c2410_udc_enable(udc);
1640
1641         return 0;
1642 }
1643
1644 static int s3c2410_udc_stop(struct usb_gadget *g)
1645 {
1646         struct s3c2410_udc *udc = to_s3c2410(g);
1647
1648         udc->driver = NULL;
1649
1650         /* Disable udc */
1651         s3c2410_udc_disable(udc);
1652
1653         return 0;
1654 }
1655
1656 /*---------------------------------------------------------------------------*/
1657 static struct s3c2410_udc memory = {
1658         .gadget = {
1659                 .ops            = &s3c2410_ops,
1660                 .ep0            = &memory.ep[0].ep,
1661                 .name           = gadget_name,
1662                 .dev = {
1663                         .init_name      = "gadget",
1664                 },
1665         },
1666
1667         /* control endpoint */
1668         .ep[0] = {
1669                 .num            = 0,
1670                 .ep = {
1671                         .name           = ep0name,
1672                         .ops            = &s3c2410_ep_ops,
1673                         .maxpacket      = EP0_FIFO_SIZE,
1674                         .caps           = USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL,
1675                                                 USB_EP_CAPS_DIR_ALL),
1676                 },
1677                 .dev            = &memory,
1678         },
1679
1680         /* first group of endpoints */
1681         .ep[1] = {
1682                 .num            = 1,
1683                 .ep = {
1684                         .name           = "ep1-bulk",
1685                         .ops            = &s3c2410_ep_ops,
1686                         .maxpacket      = EP_FIFO_SIZE,
1687                         .caps           = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1688                                                 USB_EP_CAPS_DIR_ALL),
1689                 },
1690                 .dev            = &memory,
1691                 .fifo_size      = EP_FIFO_SIZE,
1692                 .bEndpointAddress = 1,
1693                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1694         },
1695         .ep[2] = {
1696                 .num            = 2,
1697                 .ep = {
1698                         .name           = "ep2-bulk",
1699                         .ops            = &s3c2410_ep_ops,
1700                         .maxpacket      = EP_FIFO_SIZE,
1701                         .caps           = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1702                                                 USB_EP_CAPS_DIR_ALL),
1703                 },
1704                 .dev            = &memory,
1705                 .fifo_size      = EP_FIFO_SIZE,
1706                 .bEndpointAddress = 2,
1707                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1708         },
1709         .ep[3] = {
1710                 .num            = 3,
1711                 .ep = {
1712                         .name           = "ep3-bulk",
1713                         .ops            = &s3c2410_ep_ops,
1714                         .maxpacket      = EP_FIFO_SIZE,
1715                         .caps           = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1716                                                 USB_EP_CAPS_DIR_ALL),
1717                 },
1718                 .dev            = &memory,
1719                 .fifo_size      = EP_FIFO_SIZE,
1720                 .bEndpointAddress = 3,
1721                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1722         },
1723         .ep[4] = {
1724                 .num            = 4,
1725                 .ep = {
1726                         .name           = "ep4-bulk",
1727                         .ops            = &s3c2410_ep_ops,
1728                         .maxpacket      = EP_FIFO_SIZE,
1729                         .caps           = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
1730                                                 USB_EP_CAPS_DIR_ALL),
1731                 },
1732                 .dev            = &memory,
1733                 .fifo_size      = EP_FIFO_SIZE,
1734                 .bEndpointAddress = 4,
1735                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1736         }
1737
1738 };
1739
1740 /*
1741  *      probe - binds to the platform device
1742  */
1743 static int s3c2410_udc_probe(struct platform_device *pdev)
1744 {
1745         struct s3c2410_udc *udc = &memory;
1746         struct device *dev = &pdev->dev;
1747         int retval;
1748         int irq;
1749
1750         dev_dbg(dev, "%s()\n", __func__);
1751
1752         usb_bus_clock = clk_get(NULL, "usb-bus-gadget");
1753         if (IS_ERR(usb_bus_clock)) {
1754                 dev_err(dev, "failed to get usb bus clock source\n");
1755                 return PTR_ERR(usb_bus_clock);
1756         }
1757
1758         clk_prepare_enable(usb_bus_clock);
1759
1760         udc_clock = clk_get(NULL, "usb-device");
1761         if (IS_ERR(udc_clock)) {
1762                 dev_err(dev, "failed to get udc clock source\n");
1763                 return PTR_ERR(udc_clock);
1764         }
1765
1766         clk_prepare_enable(udc_clock);
1767
1768         mdelay(10);
1769
1770         dev_dbg(dev, "got and enabled clocks\n");
1771
1772         if (strncmp(pdev->name, "s3c2440", 7) == 0) {
1773                 dev_info(dev, "S3C2440: increasing FIFO to 128 bytes\n");
1774                 memory.ep[1].fifo_size = S3C2440_EP_FIFO_SIZE;
1775                 memory.ep[2].fifo_size = S3C2440_EP_FIFO_SIZE;
1776                 memory.ep[3].fifo_size = S3C2440_EP_FIFO_SIZE;
1777                 memory.ep[4].fifo_size = S3C2440_EP_FIFO_SIZE;
1778         }
1779
1780         spin_lock_init(&udc->lock);
1781         udc_info = dev_get_platdata(&pdev->dev);
1782
1783         rsrc_start = S3C2410_PA_USBDEV;
1784         rsrc_len   = S3C24XX_SZ_USBDEV;
1785
1786         if (!request_mem_region(rsrc_start, rsrc_len, gadget_name))
1787                 return -EBUSY;
1788
1789         base_addr = ioremap(rsrc_start, rsrc_len);
1790         if (!base_addr) {
1791                 retval = -ENOMEM;
1792                 goto err_mem;
1793         }
1794
1795         the_controller = udc;
1796         platform_set_drvdata(pdev, udc);
1797
1798         s3c2410_udc_disable(udc);
1799         s3c2410_udc_reinit(udc);
1800
1801         /* irq setup after old hardware state is cleaned up */
1802         retval = request_irq(IRQ_USBD, s3c2410_udc_irq,
1803                              0, gadget_name, udc);
1804
1805         if (retval != 0) {
1806                 dev_err(dev, "cannot get irq %i, err %d\n", IRQ_USBD, retval);
1807                 retval = -EBUSY;
1808                 goto err_map;
1809         }
1810
1811         dev_dbg(dev, "got irq %i\n", IRQ_USBD);
1812
1813         if (udc_info && udc_info->vbus_pin > 0) {
1814                 retval = gpio_request(udc_info->vbus_pin, "udc vbus");
1815                 if (retval < 0) {
1816                         dev_err(dev, "cannot claim vbus pin\n");
1817                         goto err_int;
1818                 }
1819
1820                 irq = gpio_to_irq(udc_info->vbus_pin);
1821                 if (irq < 0) {
1822                         dev_err(dev, "no irq for gpio vbus pin\n");
1823                         retval = irq;
1824                         goto err_gpio_claim;
1825                 }
1826
1827                 retval = request_irq(irq, s3c2410_udc_vbus_irq,
1828                                      IRQF_TRIGGER_RISING
1829                                      | IRQF_TRIGGER_FALLING | IRQF_SHARED,
1830                                      gadget_name, udc);
1831
1832                 if (retval != 0) {
1833                         dev_err(dev, "can't get vbus irq %d, err %d\n",
1834                                 irq, retval);
1835                         retval = -EBUSY;
1836                         goto err_gpio_claim;
1837                 }
1838
1839                 dev_dbg(dev, "got irq %i\n", irq);
1840         } else {
1841                 udc->vbus = 1;
1842         }
1843
1844         if (udc_info && !udc_info->udc_command &&
1845                 gpio_is_valid(udc_info->pullup_pin)) {
1846
1847                 retval = gpio_request_one(udc_info->pullup_pin,
1848                                 udc_info->vbus_pin_inverted ?
1849                                 GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
1850                                 "udc pullup");
1851                 if (retval)
1852                         goto err_vbus_irq;
1853         }
1854
1855         retval = usb_add_gadget_udc(&pdev->dev, &udc->gadget);
1856         if (retval)
1857                 goto err_add_udc;
1858
1859         udc->regs_info = debugfs_create_file("registers", S_IRUGO,
1860                                              s3c2410_udc_debugfs_root, udc,
1861                                              &s3c2410_udc_debugfs_fops);
1862
1863         dev_dbg(dev, "probe ok\n");
1864
1865         return 0;
1866
1867 err_add_udc:
1868         if (udc_info && !udc_info->udc_command &&
1869                         gpio_is_valid(udc_info->pullup_pin))
1870                 gpio_free(udc_info->pullup_pin);
1871 err_vbus_irq:
1872         if (udc_info && udc_info->vbus_pin > 0)
1873                 free_irq(gpio_to_irq(udc_info->vbus_pin), udc);
1874 err_gpio_claim:
1875         if (udc_info && udc_info->vbus_pin > 0)
1876                 gpio_free(udc_info->vbus_pin);
1877 err_int:
1878         free_irq(IRQ_USBD, udc);
1879 err_map:
1880         iounmap(base_addr);
1881 err_mem:
1882         release_mem_region(rsrc_start, rsrc_len);
1883
1884         return retval;
1885 }
1886
1887 /*
1888  *      s3c2410_udc_remove
1889  */
1890 static int s3c2410_udc_remove(struct platform_device *pdev)
1891 {
1892         struct s3c2410_udc *udc = platform_get_drvdata(pdev);
1893         unsigned int irq;
1894
1895         dev_dbg(&pdev->dev, "%s()\n", __func__);
1896
1897         if (udc->driver)
1898                 return -EBUSY;
1899
1900         usb_del_gadget_udc(&udc->gadget);
1901         debugfs_remove(udc->regs_info);
1902
1903         if (udc_info && !udc_info->udc_command &&
1904                 gpio_is_valid(udc_info->pullup_pin))
1905                 gpio_free(udc_info->pullup_pin);
1906
1907         if (udc_info && udc_info->vbus_pin > 0) {
1908                 irq = gpio_to_irq(udc_info->vbus_pin);
1909                 free_irq(irq, udc);
1910         }
1911
1912         free_irq(IRQ_USBD, udc);
1913
1914         iounmap(base_addr);
1915         release_mem_region(rsrc_start, rsrc_len);
1916
1917         if (!IS_ERR(udc_clock) && udc_clock != NULL) {
1918                 clk_disable_unprepare(udc_clock);
1919                 clk_put(udc_clock);
1920                 udc_clock = NULL;
1921         }
1922
1923         if (!IS_ERR(usb_bus_clock) && usb_bus_clock != NULL) {
1924                 clk_disable_unprepare(usb_bus_clock);
1925                 clk_put(usb_bus_clock);
1926                 usb_bus_clock = NULL;
1927         }
1928
1929         dev_dbg(&pdev->dev, "%s: remove ok\n", __func__);
1930         return 0;
1931 }
1932
1933 #ifdef CONFIG_PM
1934 static int
1935 s3c2410_udc_suspend(struct platform_device *pdev, pm_message_t message)
1936 {
1937         s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
1938
1939         return 0;
1940 }
1941
1942 static int s3c2410_udc_resume(struct platform_device *pdev)
1943 {
1944         s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
1945
1946         return 0;
1947 }
1948 #else
1949 #define s3c2410_udc_suspend     NULL
1950 #define s3c2410_udc_resume      NULL
1951 #endif
1952
1953 static const struct platform_device_id s3c_udc_ids[] = {
1954         { "s3c2410-usbgadget", },
1955         { "s3c2440-usbgadget", },
1956         { }
1957 };
1958 MODULE_DEVICE_TABLE(platform, s3c_udc_ids);
1959
1960 static struct platform_driver udc_driver_24x0 = {
1961         .driver         = {
1962                 .name   = "s3c24x0-usbgadget",
1963         },
1964         .probe          = s3c2410_udc_probe,
1965         .remove         = s3c2410_udc_remove,
1966         .suspend        = s3c2410_udc_suspend,
1967         .resume         = s3c2410_udc_resume,
1968         .id_table       = s3c_udc_ids,
1969 };
1970
1971 static int __init udc_init(void)
1972 {
1973         int retval;
1974
1975         dprintk(DEBUG_NORMAL, "%s\n", gadget_name);
1976
1977         s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name,
1978                                                       usb_debug_root);
1979
1980         retval = platform_driver_register(&udc_driver_24x0);
1981         if (retval)
1982                 goto err;
1983
1984         return 0;
1985
1986 err:
1987         debugfs_remove(s3c2410_udc_debugfs_root);
1988         return retval;
1989 }
1990
1991 static void __exit udc_exit(void)
1992 {
1993         platform_driver_unregister(&udc_driver_24x0);
1994         debugfs_remove_recursive(s3c2410_udc_debugfs_root);
1995 }
1996
1997 module_init(udc_init);
1998 module_exit(udc_exit);
1999
2000 MODULE_AUTHOR(DRIVER_AUTHOR);
2001 MODULE_DESCRIPTION(DRIVER_DESC);
2002 MODULE_LICENSE("GPL");