git.oblomov.eu Git - linux-2.6/blob - drivers/usb/gadget/s3c2410_udc.c

   1 /*
   2  * linux/drivers/usb/gadget/s3c2410_udc.c
   3  *
   4  * Samsung S3C24xx series on-chip full speed USB device controllers
   5  *
   6  * Copyright (C) 2004-2007 Herbert Pötzl - Arnaud Patard
   7  *      Additional cleanups by Ben Dooks <ben-linux@fluff.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  *
  23  */
  24
  25 #include <linux/module.h>
  26 #include <linux/kernel.h>
  27 #include <linux/delay.h>
  28 #include <linux/ioport.h>
  29 #include <linux/sched.h>
  30 #include <linux/slab.h>
  31 #include <linux/smp_lock.h>
  32 #include <linux/errno.h>
  33 #include <linux/init.h>
  34 #include <linux/timer.h>
  35 #include <linux/list.h>
  36 #include <linux/interrupt.h>
  37 #include <linux/platform_device.h>
  38 #include <linux/version.h>
  39 #include <linux/clk.h>
  40
  41 #include <linux/debugfs.h>
  42 #include <linux/seq_file.h>
  43
  44 #include <linux/usb.h>
  45 #include <linux/usb/gadget.h>
  46
  47 #include <asm/byteorder.h>
  48 #include <asm/io.h>
  49 #include <asm/irq.h>
  50 #include <asm/system.h>
  51 #include <asm/unaligned.h>
  52 #include <mach/irqs.h>
  53
  54 #include <mach/hardware.h>
  55 #include <mach/regs-gpio.h>
  56
  57 #include <asm/plat-s3c24xx/regs-udc.h>
  58 #include <asm/plat-s3c24xx/udc.h>
  59
  60
  61 #include "s3c2410_udc.h"
  62
  63 #define DRIVER_DESC     "S3C2410 USB Device Controller Gadget"
  64 #define DRIVER_VERSION  "29 Apr 2007"
  65 #define DRIVER_AUTHOR   "Herbert Pötzl <herbert@13thfloor.at>, " \
  66                         "Arnaud Patard <arnaud.patard@rtp-net.org>"
  67
  68 static const char               gadget_name[] = "s3c2410_udc";
  69 static const char               driver_desc[] = DRIVER_DESC;
  70
  71 static struct s3c2410_udc       *the_controller;
  72 static struct clk               *udc_clock;
  73 static struct clk               *usb_bus_clock;
  74 static void __iomem             *base_addr;
  75 static u64                      rsrc_start;
  76 static u64                      rsrc_len;
  77 static struct dentry            *s3c2410_udc_debugfs_root;
  78
  79 static inline u32 udc_read(u32 reg)
  80 {
  81         return readb(base_addr + reg);
  82 }
  83
  84 static inline void udc_write(u32 value, u32 reg)
  85 {
  86         writeb(value, base_addr + reg);
  87 }
  88
  89 static inline void udc_writeb(void __iomem *base, u32 value, u32 reg)
  90 {
  91         writeb(value, base + reg);
  92 }
  93
  94 static struct s3c2410_udc_mach_info *udc_info;
  95
  96 /*************************** DEBUG FUNCTION ***************************/
  97 #define DEBUG_NORMAL    1
  98 #define DEBUG_VERBOSE   2
  99
 100 #ifdef CONFIG_USB_S3C2410_DEBUG
 101 #define USB_S3C2410_DEBUG_LEVEL 0
 102
 103 static uint32_t s3c2410_ticks = 0;
 104
 105 static int dprintk(int level, const char *fmt, ...)
 106 {
 107         static char printk_buf[1024];
 108         static long prevticks;
 109         static int invocation;
 110         va_list args;
 111         int len;
 112
 113         if (level > USB_S3C2410_DEBUG_LEVEL)
 114                 return 0;
 115
 116         if (s3c2410_ticks != prevticks) {
 117                 prevticks = s3c2410_ticks;
 118                 invocation = 0;
 119         }
 120
 121         len = scnprintf(printk_buf,
 122                         sizeof(printk_buf), "%1lu.%02d USB: ",
 123                         prevticks, invocation++);
 124
 125         va_start(args, fmt);
 126         len = vscnprintf(printk_buf+len,
 127                         sizeof(printk_buf)-len, fmt, args);
 128         va_end(args);
 129
 130         return printk(KERN_DEBUG "%s", printk_buf);
 131 }
 132 #else
 133 static int dprintk(int level, const char *fmt, ...)
 134 {
 135         return 0;
 136 }
 137 #endif
 138 static int s3c2410_udc_debugfs_seq_show(struct seq_file *m, void *p)
 139 {
 140         u32 addr_reg,pwr_reg,ep_int_reg,usb_int_reg;
 141         u32 ep_int_en_reg, usb_int_en_reg, ep0_csr;
 142         u32 ep1_i_csr1,ep1_i_csr2,ep1_o_csr1,ep1_o_csr2;
 143         u32 ep2_i_csr1,ep2_i_csr2,ep2_o_csr1,ep2_o_csr2;
 144
 145         addr_reg       = udc_read(S3C2410_UDC_FUNC_ADDR_REG);
 146         pwr_reg        = udc_read(S3C2410_UDC_PWR_REG);
 147         ep_int_reg     = udc_read(S3C2410_UDC_EP_INT_REG);
 148         usb_int_reg    = udc_read(S3C2410_UDC_USB_INT_REG);
 149         ep_int_en_reg  = udc_read(S3C2410_UDC_EP_INT_EN_REG);
 150         usb_int_en_reg = udc_read(S3C2410_UDC_USB_INT_EN_REG);
 151         udc_write(0, S3C2410_UDC_INDEX_REG);
 152         ep0_csr        = udc_read(S3C2410_UDC_IN_CSR1_REG);
 153         udc_write(1, S3C2410_UDC_INDEX_REG);
 154         ep1_i_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 155         ep1_i_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 156         ep1_o_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 157         ep1_o_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 158         udc_write(2, S3C2410_UDC_INDEX_REG);
 159         ep2_i_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 160         ep2_i_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 161         ep2_o_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 162         ep2_o_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 163
 164         seq_printf(m, "FUNC_ADDR_REG  : 0x%04X\n"
 165                  "PWR_REG        : 0x%04X\n"
 166                  "EP_INT_REG     : 0x%04X\n"
 167                  "USB_INT_REG    : 0x%04X\n"
 168                  "EP_INT_EN_REG  : 0x%04X\n"
 169                  "USB_INT_EN_REG : 0x%04X\n"
 170                  "EP0_CSR        : 0x%04X\n"
 171                  "EP1_I_CSR1     : 0x%04X\n"
 172                  "EP1_I_CSR2     : 0x%04X\n"
 173                  "EP1_O_CSR1     : 0x%04X\n"
 174                  "EP1_O_CSR2     : 0x%04X\n"
 175                  "EP2_I_CSR1     : 0x%04X\n"
 176                  "EP2_I_CSR2     : 0x%04X\n"
 177                  "EP2_O_CSR1     : 0x%04X\n"
 178                  "EP2_O_CSR2     : 0x%04X\n",
 179                         addr_reg,pwr_reg,ep_int_reg,usb_int_reg,
 180                         ep_int_en_reg, usb_int_en_reg, ep0_csr,
 181                         ep1_i_csr1,ep1_i_csr2,ep1_o_csr1,ep1_o_csr2,
 182                         ep2_i_csr1,ep2_i_csr2,ep2_o_csr1,ep2_o_csr2
 183                 );
 184
 185         return 0;
 186 }
 187
 188 static int s3c2410_udc_debugfs_fops_open(struct inode *inode,
 189                                          struct file *file)
 190 {
 191         return single_open(file, s3c2410_udc_debugfs_seq_show, NULL);
 192 }
 193
 194 static const struct file_operations s3c2410_udc_debugfs_fops = {
 195         .open           = s3c2410_udc_debugfs_fops_open,
 196         .read           = seq_read,
 197         .llseek         = seq_lseek,
 198         .release        = single_release,
 199         .owner          = THIS_MODULE,
 200 };
 201
 202 /* io macros */
 203
 204 static inline void s3c2410_udc_clear_ep0_opr(void __iomem *base)
 205 {
 206         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 207         udc_writeb(base, S3C2410_UDC_EP0_CSR_SOPKTRDY,
 208                         S3C2410_UDC_EP0_CSR_REG);
 209 }
 210
 211 static inline void s3c2410_udc_clear_ep0_sst(void __iomem *base)
 212 {
 213         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 214         writeb(0x00, base + S3C2410_UDC_EP0_CSR_REG);
 215 }
 216
 217 static inline void s3c2410_udc_clear_ep0_se(void __iomem *base)
 218 {
 219         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 220         udc_writeb(base, S3C2410_UDC_EP0_CSR_SSE, S3C2410_UDC_EP0_CSR_REG);
 221 }
 222
 223 static inline void s3c2410_udc_set_ep0_ipr(void __iomem *base)
 224 {
 225         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 226         udc_writeb(base, S3C2410_UDC_EP0_CSR_IPKRDY, S3C2410_UDC_EP0_CSR_REG);
 227 }
 228
 229 static inline void s3c2410_udc_set_ep0_de(void __iomem *base)
 230 {
 231         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 232         udc_writeb(base, S3C2410_UDC_EP0_CSR_DE, S3C2410_UDC_EP0_CSR_REG);
 233 }
 234
 235 inline void s3c2410_udc_set_ep0_ss(void __iomem *b)
 236 {
 237         udc_writeb(b, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 238         udc_writeb(b, S3C2410_UDC_EP0_CSR_SENDSTL, S3C2410_UDC_EP0_CSR_REG);
 239 }
 240
 241 static inline void s3c2410_udc_set_ep0_de_out(void __iomem *base)
 242 {
 243         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 244
 245         udc_writeb(base,(S3C2410_UDC_EP0_CSR_SOPKTRDY
 246                                 | S3C2410_UDC_EP0_CSR_DE),
 247                         S3C2410_UDC_EP0_CSR_REG);
 248 }
 249
 250 static inline void s3c2410_udc_set_ep0_sse_out(void __iomem *base)
 251 {
 252         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 253         udc_writeb(base, (S3C2410_UDC_EP0_CSR_SOPKTRDY
 254                                 | S3C2410_UDC_EP0_CSR_SSE),
 255                         S3C2410_UDC_EP0_CSR_REG);
 256 }
 257
 258 static inline void s3c2410_udc_set_ep0_de_in(void __iomem *base)
 259 {
 260         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 261         udc_writeb(base, (S3C2410_UDC_EP0_CSR_IPKRDY
 262                         | S3C2410_UDC_EP0_CSR_DE),
 263                 S3C2410_UDC_EP0_CSR_REG);
 264 }
 265
 266 /*------------------------- I/O ----------------------------------*/
 267
 268 /*
 269  *      s3c2410_udc_done
 270  */
 271 static void s3c2410_udc_done(struct s3c2410_ep *ep,
 272                 struct s3c2410_request *req, int status)
 273 {
 274         unsigned halted = ep->halted;
 275
 276         list_del_init(&req->queue);
 277
 278         if (likely (req->req.status == -EINPROGRESS))
 279                 req->req.status = status;
 280         else
 281                 status = req->req.status;
 282
 283         ep->halted = 1;
 284         req->req.complete(&ep->ep, &req->req);
 285         ep->halted = halted;
 286 }
 287
 288 static void s3c2410_udc_nuke(struct s3c2410_udc *udc,
 289                 struct s3c2410_ep *ep, int status)
 290 {
 291         /* Sanity check */
 292         if (&ep->queue == NULL)
 293                 return;
 294
 295         while (!list_empty (&ep->queue)) {
 296                 struct s3c2410_request *req;
 297                 req = list_entry (ep->queue.next, struct s3c2410_request,
 298                                 queue);
 299                 s3c2410_udc_done(ep, req, status);
 300         }
 301 }
 302
 303 static inline void s3c2410_udc_clear_ep_state(struct s3c2410_udc *dev)
 304 {
 305         unsigned i;
 306
 307         /* hardware SET_{CONFIGURATION,INTERFACE} automagic resets endpoint
 308          * fifos, and pending transactions mustn't be continued in any case.
 309          */
 310
 311         for (i = 1; i < S3C2410_ENDPOINTS; i++)
 312                 s3c2410_udc_nuke(dev, &dev->ep[i], -ECONNABORTED);
 313 }
 314
 315 static inline int s3c2410_udc_fifo_count_out(void)
 316 {
 317         int tmp;
 318
 319         tmp = udc_read(S3C2410_UDC_OUT_FIFO_CNT2_REG) << 8;
 320         tmp |= udc_read(S3C2410_UDC_OUT_FIFO_CNT1_REG);
 321         return tmp;
 322 }
 323
 324 /*
 325  *      s3c2410_udc_write_packet
 326  */
 327 static inline int s3c2410_udc_write_packet(int fifo,
 328                 struct s3c2410_request *req,
 329                 unsigned max)
 330 {
 331         unsigned len = min(req->req.length - req->req.actual, max);
 332         u8 *buf = req->req.buf + req->req.actual;
 333
 334         prefetch(buf);
 335
 336         dprintk(DEBUG_VERBOSE, "%s %d %d %d %d\n", __func__,
 337                 req->req.actual, req->req.length, len, req->req.actual + len);
 338
 339         req->req.actual += len;
 340
 341         udelay(5);
 342         writesb(base_addr + fifo, buf, len);
 343         return len;
 344 }
 345
 346 /*
 347  *      s3c2410_udc_write_fifo
 348  *
 349  * return:  0 = still running, 1 = completed, negative = errno
 350  */
 351 static int s3c2410_udc_write_fifo(struct s3c2410_ep *ep,
 352                 struct s3c2410_request *req)
 353 {
 354         unsigned        count;
 355         int             is_last;
 356         u32             idx;
 357         int             fifo_reg;
 358         u32             ep_csr;
 359
 360         idx = ep->bEndpointAddress & 0x7F;
 361         switch (idx) {
 362         default:
 363                 idx = 0;
 364         case 0:
 365                 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
 366                 break;
 367         case 1:
 368                 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
 369                 break;
 370         case 2:
 371                 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
 372                 break;
 373         case 3:
 374                 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
 375                 break;
 376         case 4:
 377                 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
 378                 break;
 379         }
 380
 381         count = s3c2410_udc_write_packet(fifo_reg, req, ep->ep.maxpacket);
 382
 383         /* last packet is often short (sometimes a zlp) */
 384         if (count != ep->ep.maxpacket)
 385                 is_last = 1;
 386         else if (req->req.length != req->req.actual || req->req.zero)
 387                 is_last = 0;
 388         else
 389                 is_last = 2;
 390
 391         /* Only ep0 debug messages are interesting */
 392         if (idx == 0)
 393                 dprintk(DEBUG_NORMAL,
 394                         "Written ep%d %d.%d of %d b [last %d,z %d]\n",
 395                         idx, count, req->req.actual, req->req.length,
 396                         is_last, req->req.zero);
 397
 398         if (is_last) {
 399                 /* The order is important. It prevents sending 2 packets
 400                  * at the same time */
 401
 402                 if (idx == 0) {
 403                         /* Reset signal => no need to say 'data sent' */
 404                         if (! (udc_read(S3C2410_UDC_USB_INT_REG)
 405                                         & S3C2410_UDC_USBINT_RESET))
 406                                 s3c2410_udc_set_ep0_de_in(base_addr);
 407                         ep->dev->ep0state=EP0_IDLE;
 408                 } else {
 409                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 410                         ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 411                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 412                         udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
 413                                         S3C2410_UDC_IN_CSR1_REG);
 414                 }
 415
 416                 s3c2410_udc_done(ep, req, 0);
 417                 is_last = 1;
 418         } else {
 419                 if (idx == 0) {
 420                         /* Reset signal => no need to say 'data sent' */
 421                         if (! (udc_read(S3C2410_UDC_USB_INT_REG)
 422                                         & S3C2410_UDC_USBINT_RESET))
 423                                 s3c2410_udc_set_ep0_ipr(base_addr);
 424                 } else {
 425                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 426                         ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 427                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 428                         udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
 429                                         S3C2410_UDC_IN_CSR1_REG);
 430                 }
 431         }
 432
 433         return is_last;
 434 }
 435
 436 static inline int s3c2410_udc_read_packet(int fifo, u8 *buf,
 437                 struct s3c2410_request *req, unsigned avail)
 438 {
 439         unsigned len;
 440
 441         len = min(req->req.length - req->req.actual, avail);
 442         req->req.actual += len;
 443
 444         readsb(fifo + base_addr, buf, len);
 445         return len;
 446 }
 447
 448 /*
 449  * return:  0 = still running, 1 = queue empty, negative = errno
 450  */
 451 static int s3c2410_udc_read_fifo(struct s3c2410_ep *ep,
 452                                  struct s3c2410_request *req)
 453 {
 454         u8              *buf;
 455         u32             ep_csr;
 456         unsigned        bufferspace;
 457         int             is_last=1;
 458         unsigned        avail;
 459         int             fifo_count = 0;
 460         u32             idx;
 461         int             fifo_reg;
 462
 463         idx = ep->bEndpointAddress & 0x7F;
 464
 465         switch (idx) {
 466         default:
 467                 idx = 0;
 468         case 0:
 469                 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
 470                 break;
 471         case 1:
 472                 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
 473                 break;
 474         case 2:
 475                 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
 476                 break;
 477         case 3:
 478                 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
 479                 break;
 480         case 4:
 481                 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
 482                 break;
 483         }
 484
 485         if (!req->req.length)
 486                 return 1;
 487
 488         buf = req->req.buf + req->req.actual;
 489         bufferspace = req->req.length - req->req.actual;
 490         if (!bufferspace) {
 491                 dprintk(DEBUG_NORMAL, "%s: buffer full!\n", __func__);
 492                 return -1;
 493         }
 494
 495         udc_write(idx, S3C2410_UDC_INDEX_REG);
 496
 497         fifo_count = s3c2410_udc_fifo_count_out();
 498         dprintk(DEBUG_NORMAL, "%s fifo count : %d\n", __func__, fifo_count);
 499
 500         if (fifo_count > ep->ep.maxpacket)
 501                 avail = ep->ep.maxpacket;
 502         else
 503                 avail = fifo_count;
 504
 505         fifo_count = s3c2410_udc_read_packet(fifo_reg, buf, req, avail);
 506
 507         /* checking this with ep0 is not accurate as we already
 508          * read a control request
 509          **/
 510         if (idx != 0 && fifo_count < ep->ep.maxpacket) {
 511                 is_last = 1;
 512                 /* overflowed this request?  flush extra data */
 513                 if (fifo_count != avail)
 514                         req->req.status = -EOVERFLOW;
 515         } else {
 516                 is_last = (req->req.length <= req->req.actual) ? 1 : 0;
 517         }
 518
 519         udc_write(idx, S3C2410_UDC_INDEX_REG);
 520         fifo_count = s3c2410_udc_fifo_count_out();
 521
 522         /* Only ep0 debug messages are interesting */
 523         if (idx == 0)
 524                 dprintk(DEBUG_VERBOSE, "%s fifo count : %d [last %d]\n",
 525                         __func__, fifo_count,is_last);
 526
 527         if (is_last) {
 528                 if (idx == 0) {
 529                         s3c2410_udc_set_ep0_de_out(base_addr);
 530                         ep->dev->ep0state = EP0_IDLE;
 531                 } else {
 532                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 533                         ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 534                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 535                         udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
 536                                         S3C2410_UDC_OUT_CSR1_REG);
 537                 }
 538
 539                 s3c2410_udc_done(ep, req, 0);
 540         } else {
 541                 if (idx == 0) {
 542                         s3c2410_udc_clear_ep0_opr(base_addr);
 543                 } else {
 544                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 545                         ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 546                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 547                         udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
 548                                         S3C2410_UDC_OUT_CSR1_REG);
 549                 }
 550         }
 551
 552         return is_last;
 553 }
 554
 555 static int s3c2410_udc_read_fifo_crq(struct usb_ctrlrequest *crq)
 556 {
 557         unsigned char *outbuf = (unsigned char*)crq;
 558         int bytes_read = 0;
 559
 560         udc_write(0, S3C2410_UDC_INDEX_REG);
 561
 562         bytes_read = s3c2410_udc_fifo_count_out();
 563
 564         dprintk(DEBUG_NORMAL, "%s: fifo_count=%d\n", __func__, bytes_read);
 565
 566         if (bytes_read > sizeof(struct usb_ctrlrequest))
 567                 bytes_read = sizeof(struct usb_ctrlrequest);
 568
 569         readsb(S3C2410_UDC_EP0_FIFO_REG + base_addr, outbuf, bytes_read);
 570
 571         dprintk(DEBUG_VERBOSE, "%s: len=%d %02x:%02x {%x,%x,%x}\n", __func__,
 572                 bytes_read, crq->bRequest, crq->bRequestType,
 573                 crq->wValue, crq->wIndex, crq->wLength);
 574
 575         return bytes_read;
 576 }
 577
 578 static int s3c2410_udc_get_status(struct s3c2410_udc *dev,
 579                 struct usb_ctrlrequest *crq)
 580 {
 581         u16 status = 0;
 582         u8 ep_num = crq->wIndex & 0x7F;
 583         u8 is_in = crq->wIndex & USB_DIR_IN;
 584
 585         switch (crq->bRequestType & USB_RECIP_MASK) {
 586         case USB_RECIP_INTERFACE:
 587                 break;
 588
 589         case USB_RECIP_DEVICE:
 590                 status = dev->devstatus;
 591                 break;
 592
 593         case USB_RECIP_ENDPOINT:
 594                 if (ep_num > 4 || crq->wLength > 2)
 595                         return 1;
 596
 597                 if (ep_num == 0) {
 598                         udc_write(0, S3C2410_UDC_INDEX_REG);
 599                         status = udc_read(S3C2410_UDC_IN_CSR1_REG);
 600                         status = status & S3C2410_UDC_EP0_CSR_SENDSTL;
 601                 } else {
 602                         udc_write(ep_num, S3C2410_UDC_INDEX_REG);
 603                         if (is_in) {
 604                                 status = udc_read(S3C2410_UDC_IN_CSR1_REG);
 605                                 status = status & S3C2410_UDC_ICSR1_SENDSTL;
 606                         } else {
 607                                 status = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 608                                 status = status & S3C2410_UDC_OCSR1_SENDSTL;
 609                         }
 610                 }
 611
 612                 status = status ? 1 : 0;
 613                 break;
 614
 615         default:
 616                 return 1;
 617         }
 618
 619         /* Seems to be needed to get it working. ouch :( */
 620         udelay(5);
 621         udc_write(status & 0xFF, S3C2410_UDC_EP0_FIFO_REG);
 622         udc_write(status >> 8, S3C2410_UDC_EP0_FIFO_REG);
 623         s3c2410_udc_set_ep0_de_in(base_addr);
 624
 625         return 0;
 626 }
 627 /*------------------------- usb state machine -------------------------------*/
 628 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value);
 629
 630 static void s3c2410_udc_handle_ep0_idle(struct s3c2410_udc *dev,
 631                                         struct s3c2410_ep *ep,
 632                                         struct usb_ctrlrequest *crq,
 633                                         u32 ep0csr)
 634 {
 635         int len, ret, tmp;
 636
 637         /* start control request? */
 638         if (!(ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY))
 639                 return;
 640
 641         s3c2410_udc_nuke(dev, ep, -EPROTO);
 642
 643         len = s3c2410_udc_read_fifo_crq(crq);
 644         if (len != sizeof(*crq)) {
 645                 dprintk(DEBUG_NORMAL, "setup begin: fifo READ ERROR"
 646                         " wanted %d bytes got %d. Stalling out...\n",
 647                         sizeof(*crq), len);
 648                 s3c2410_udc_set_ep0_ss(base_addr);
 649                 return;
 650         }
 651
 652         dprintk(DEBUG_NORMAL, "bRequest = %d bRequestType %d wLength = %d\n",
 653                 crq->bRequest, crq->bRequestType, crq->wLength);
 654
 655         /* cope with automagic for some standard requests. */
 656         dev->req_std = (crq->bRequestType & USB_TYPE_MASK)
 657                 == USB_TYPE_STANDARD;
 658         dev->req_config = 0;
 659         dev->req_pending = 1;
 660
 661         switch (crq->bRequest) {
 662         case USB_REQ_SET_CONFIGURATION:
 663                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_CONFIGURATION ... \n");
 664
 665                 if (crq->bRequestType == USB_RECIP_DEVICE) {
 666                         dev->req_config = 1;
 667                         s3c2410_udc_set_ep0_de_out(base_addr);
 668                 }
 669                 break;
 670
 671         case USB_REQ_SET_INTERFACE:
 672                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_INTERFACE ... \n");
 673
 674                 if (crq->bRequestType == USB_RECIP_INTERFACE) {
 675                         dev->req_config = 1;
 676                         s3c2410_udc_set_ep0_de_out(base_addr);
 677                 }
 678                 break;
 679
 680         case USB_REQ_SET_ADDRESS:
 681                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_ADDRESS ... \n");
 682
 683                 if (crq->bRequestType == USB_RECIP_DEVICE) {
 684                         tmp = crq->wValue & 0x7F;
 685                         dev->address = tmp;
 686                         udc_write((tmp | S3C2410_UDC_FUNCADDR_UPDATE),
 687                                         S3C2410_UDC_FUNC_ADDR_REG);
 688                         s3c2410_udc_set_ep0_de_out(base_addr);
 689                         return;
 690                 }
 691                 break;
 692
 693         case USB_REQ_GET_STATUS:
 694                 dprintk(DEBUG_NORMAL, "USB_REQ_GET_STATUS ... \n");
 695                 s3c2410_udc_clear_ep0_opr(base_addr);
 696
 697                 if (dev->req_std) {
 698                         if (!s3c2410_udc_get_status(dev, crq)) {
 699                                 return;
 700                         }
 701                 }
 702                 break;
 703
 704         case USB_REQ_CLEAR_FEATURE:
 705                 s3c2410_udc_clear_ep0_opr(base_addr);
 706
 707                 if (crq->bRequestType != USB_RECIP_ENDPOINT)
 708                         break;
 709
 710                 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
 711                         break;
 712
 713                 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 0);
 714                 s3c2410_udc_set_ep0_de_out(base_addr);
 715                 return;
 716
 717         case USB_REQ_SET_FEATURE:
 718                 s3c2410_udc_clear_ep0_opr(base_addr);
 719
 720                 if (crq->bRequestType != USB_RECIP_ENDPOINT)
 721                         break;
 722
 723                 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
 724                         break;
 725
 726                 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 1);
 727                 s3c2410_udc_set_ep0_de_out(base_addr);
 728                 return;
 729
 730         default:
 731                 s3c2410_udc_clear_ep0_opr(base_addr);
 732                 break;
 733         }
 734
 735         if (crq->bRequestType & USB_DIR_IN)
 736                 dev->ep0state = EP0_IN_DATA_PHASE;
 737         else
 738                 dev->ep0state = EP0_OUT_DATA_PHASE;
 739
 740         ret = dev->driver->setup(&dev->gadget, crq);
 741         if (ret < 0) {
 742                 if (dev->req_config) {
 743                         dprintk(DEBUG_NORMAL, "config change %02x fail %d?\n",
 744                                 crq->bRequest, ret);
 745                         return;
 746                 }
 747
 748                 if (ret == -EOPNOTSUPP)
 749                         dprintk(DEBUG_NORMAL, "Operation not supported\n");
 750                 else
 751                         dprintk(DEBUG_NORMAL,
 752                                 "dev->driver->setup failed. (%d)\n", ret);
 753
 754                 udelay(5);
 755                 s3c2410_udc_set_ep0_ss(base_addr);
 756                 s3c2410_udc_set_ep0_de_out(base_addr);
 757                 dev->ep0state = EP0_IDLE;
 758                 /* deferred i/o == no response yet */
 759         } else if (dev->req_pending) {
 760                 dprintk(DEBUG_VERBOSE, "dev->req_pending... what now?\n");
 761                 dev->req_pending=0;
 762         }
 763
 764         dprintk(DEBUG_VERBOSE, "ep0state %s\n", ep0states[dev->ep0state]);
 765 }
 766
 767 static void s3c2410_udc_handle_ep0(struct s3c2410_udc *dev)
 768 {
 769         u32                     ep0csr;
 770         struct s3c2410_ep       *ep = &dev->ep[0];
 771         struct s3c2410_request  *req;
 772         struct usb_ctrlrequest  crq;
 773
 774         if (list_empty(&ep->queue))
 775                 req = NULL;
 776         else
 777                 req = list_entry(ep->queue.next, struct s3c2410_request, queue);
 778
 779         /* We make the assumption that S3C2410_UDC_IN_CSR1_REG equal to
 780          * S3C2410_UDC_EP0_CSR_REG when index is zero */
 781
 782         udc_write(0, S3C2410_UDC_INDEX_REG);
 783         ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 784
 785         dprintk(DEBUG_NORMAL, "ep0csr %x ep0state %s\n",
 786                 ep0csr, ep0states[dev->ep0state]);
 787
 788         /* clear stall status */
 789         if (ep0csr & S3C2410_UDC_EP0_CSR_SENTSTL) {
 790                 s3c2410_udc_nuke(dev, ep, -EPIPE);
 791                 dprintk(DEBUG_NORMAL, "... clear SENT_STALL ...\n");
 792                 s3c2410_udc_clear_ep0_sst(base_addr);
 793                 dev->ep0state = EP0_IDLE;
 794                 return;
 795         }
 796
 797         /* clear setup end */
 798         if (ep0csr & S3C2410_UDC_EP0_CSR_SE) {
 799                 dprintk(DEBUG_NORMAL, "... serviced SETUP_END ...\n");
 800                 s3c2410_udc_nuke(dev, ep, 0);
 801                 s3c2410_udc_clear_ep0_se(base_addr);
 802                 dev->ep0state = EP0_IDLE;
 803         }
 804
 805         switch (dev->ep0state) {
 806         case EP0_IDLE:
 807                 s3c2410_udc_handle_ep0_idle(dev, ep, &crq, ep0csr);
 808                 break;
 809
 810         case EP0_IN_DATA_PHASE:                 /* GET_DESCRIPTOR etc */
 811                 dprintk(DEBUG_NORMAL, "EP0_IN_DATA_PHASE ... what now?\n");
 812                 if (!(ep0csr & S3C2410_UDC_EP0_CSR_IPKRDY) && req) {
 813                         s3c2410_udc_write_fifo(ep, req);
 814                 }
 815                 break;
 816
 817         case EP0_OUT_DATA_PHASE:                /* SET_DESCRIPTOR etc */
 818                 dprintk(DEBUG_NORMAL, "EP0_OUT_DATA_PHASE ... what now?\n");
 819                 if ((ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY) && req ) {
 820                         s3c2410_udc_read_fifo(ep,req);
 821                 }
 822                 break;
 823
 824         case EP0_END_XFER:
 825                 dprintk(DEBUG_NORMAL, "EP0_END_XFER ... what now?\n");
 826                 dev->ep0state = EP0_IDLE;
 827                 break;
 828
 829         case EP0_STALL:
 830                 dprintk(DEBUG_NORMAL, "EP0_STALL ... what now?\n");
 831                 dev->ep0state = EP0_IDLE;
 832                 break;
 833         }
 834 }
 835
 836 /*
 837  *      handle_ep - Manage I/O endpoints
 838  */
 839
 840 static void s3c2410_udc_handle_ep(struct s3c2410_ep *ep)
 841 {
 842         struct s3c2410_request  *req;
 843         int                     is_in = ep->bEndpointAddress & USB_DIR_IN;
 844         u32                     ep_csr1;
 845         u32                     idx;
 846
 847         if (likely (!list_empty(&ep->queue)))
 848                 req = list_entry(ep->queue.next,
 849                                 struct s3c2410_request, queue);
 850         else
 851                 req = NULL;
 852
 853         idx = ep->bEndpointAddress & 0x7F;
 854
 855         if (is_in) {
 856                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 857                 ep_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
 858                 dprintk(DEBUG_VERBOSE, "ep%01d write csr:%02x %d\n",
 859                         idx, ep_csr1, req ? 1 : 0);
 860
 861                 if (ep_csr1 & S3C2410_UDC_ICSR1_SENTSTL) {
 862                         dprintk(DEBUG_VERBOSE, "st\n");
 863                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 864                         udc_write(ep_csr1 & ~S3C2410_UDC_ICSR1_SENTSTL,
 865                                         S3C2410_UDC_IN_CSR1_REG);
 866                         return;
 867                 }
 868
 869                 if (!(ep_csr1 & S3C2410_UDC_ICSR1_PKTRDY) && req) {
 870                         s3c2410_udc_write_fifo(ep,req);
 871                 }
 872         } else {
 873                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 874                 ep_csr1 = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 875                 dprintk(DEBUG_VERBOSE, "ep%01d rd csr:%02x\n", idx, ep_csr1);
 876
 877                 if (ep_csr1 & S3C2410_UDC_OCSR1_SENTSTL) {
 878                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 879                         udc_write(ep_csr1 & ~S3C2410_UDC_OCSR1_SENTSTL,
 880                                         S3C2410_UDC_OUT_CSR1_REG);
 881                         return;
 882                 }
 883
 884                 if ((ep_csr1 & S3C2410_UDC_OCSR1_PKTRDY) && req) {
 885                         s3c2410_udc_read_fifo(ep,req);
 886                 }
 887         }
 888 }
 889
 890 #include <mach/regs-irq.h>
 891
 892 /*
 893  *      s3c2410_udc_irq - interrupt handler
 894  */
 895 static irqreturn_t s3c2410_udc_irq(int dummy, void *_dev)
 896 {
 897         struct s3c2410_udc *dev = _dev;
 898         int usb_status;
 899         int usbd_status;
 900         int pwr_reg;
 901         int ep0csr;
 902         int i;
 903         u32 idx;
 904         unsigned long flags;
 905
 906         spin_lock_irqsave(&dev->lock, flags);
 907
 908         /* Driver connected ? */
 909         if (!dev->driver) {
 910                 /* Clear interrupts */
 911                 udc_write(udc_read(S3C2410_UDC_USB_INT_REG),
 912                                 S3C2410_UDC_USB_INT_REG);
 913                 udc_write(udc_read(S3C2410_UDC_EP_INT_REG),
 914                                 S3C2410_UDC_EP_INT_REG);
 915         }
 916
 917         /* Save index */
 918         idx = udc_read(S3C2410_UDC_INDEX_REG);
 919
 920         /* Read status registers */
 921         usb_status = udc_read(S3C2410_UDC_USB_INT_REG);
 922         usbd_status = udc_read(S3C2410_UDC_EP_INT_REG);
 923         pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
 924
 925         udc_writeb(base_addr, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 926         ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 927
 928         dprintk(DEBUG_NORMAL, "usbs=%02x, usbds=%02x, pwr=%02x ep0csr=%02x\n",
 929                 usb_status, usbd_status, pwr_reg, ep0csr);
 930
 931         /*
 932          * Now, handle interrupts. There's two types :
 933          * - Reset, Resume, Suspend coming -> usb_int_reg
 934          * - EP -> ep_int_reg
 935          */
 936
 937         /* RESET */
 938         if (usb_status & S3C2410_UDC_USBINT_RESET) {
 939                 /* two kind of reset :
 940                  * - reset start -> pwr reg = 8
 941                  * - reset end   -> pwr reg = 0
 942                  **/
 943                 dprintk(DEBUG_NORMAL, "USB reset csr %x pwr %x\n",
 944                         ep0csr, pwr_reg);
 945
 946                 dev->gadget.speed = USB_SPEED_UNKNOWN;
 947                 udc_write(0x00, S3C2410_UDC_INDEX_REG);
 948                 udc_write((dev->ep[0].ep.maxpacket & 0x7ff) >> 3,
 949                                 S3C2410_UDC_MAXP_REG);
 950                 dev->address = 0;
 951
 952                 dev->ep0state = EP0_IDLE;
 953                 dev->gadget.speed = USB_SPEED_FULL;
 954
 955                 /* clear interrupt */
 956                 udc_write(S3C2410_UDC_USBINT_RESET,
 957                                 S3C2410_UDC_USB_INT_REG);
 958
 959                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 960                 spin_unlock_irqrestore(&dev->lock, flags);
 961                 return IRQ_HANDLED;
 962         }
 963
 964         /* RESUME */
 965         if (usb_status & S3C2410_UDC_USBINT_RESUME) {
 966                 dprintk(DEBUG_NORMAL, "USB resume\n");
 967
 968                 /* clear interrupt */
 969                 udc_write(S3C2410_UDC_USBINT_RESUME,
 970                                 S3C2410_UDC_USB_INT_REG);
 971
 972                 if (dev->gadget.speed != USB_SPEED_UNKNOWN
 973                                 && dev->driver
 974                                 && dev->driver->resume)
 975                         dev->driver->resume(&dev->gadget);
 976         }
 977
 978         /* SUSPEND */
 979         if (usb_status & S3C2410_UDC_USBINT_SUSPEND) {
 980                 dprintk(DEBUG_NORMAL, "USB suspend\n");
 981
 982                 /* clear interrupt */
 983                 udc_write(S3C2410_UDC_USBINT_SUSPEND,
 984                                 S3C2410_UDC_USB_INT_REG);
 985
 986                 if (dev->gadget.speed != USB_SPEED_UNKNOWN
 987                                 && dev->driver
 988                                 && dev->driver->suspend)
 989                         dev->driver->suspend(&dev->gadget);
 990
 991                 dev->ep0state = EP0_IDLE;
 992         }
 993
 994         /* EP */
 995         /* control traffic */
 996         /* check on ep0csr != 0 is not a good idea as clearing in_pkt_ready
 997          * generate an interrupt
 998          */
 999         if (usbd_status & S3C2410_UDC_INT_EP0) {
1000                 dprintk(DEBUG_VERBOSE, "USB ep0 irq\n");
1001                 /* Clear the interrupt bit by setting it to 1 */
1002                 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_REG);
1003                 s3c2410_udc_handle_ep0(dev);
1004         }
1005
1006         /* endpoint data transfers */
1007         for (i = 1; i < S3C2410_ENDPOINTS; i++) {
1008                 u32 tmp = 1 << i;
1009                 if (usbd_status & tmp) {
1010                         dprintk(DEBUG_VERBOSE, "USB ep%d irq\n", i);
1011
1012                         /* Clear the interrupt bit by setting it to 1 */
1013                         udc_write(tmp, S3C2410_UDC_EP_INT_REG);
1014                         s3c2410_udc_handle_ep(&dev->ep[i]);
1015                 }
1016         }
1017
1018         dprintk(DEBUG_VERBOSE, "irq: %d s3c2410_udc_done.\n", IRQ_USBD);
1019
1020         /* Restore old index */
1021         udc_write(idx, S3C2410_UDC_INDEX_REG);
1022
1023         spin_unlock_irqrestore(&dev->lock, flags);
1024
1025         return IRQ_HANDLED;
1026 }
1027 /*------------------------- s3c2410_ep_ops ----------------------------------*/
1028
1029 static inline struct s3c2410_ep *to_s3c2410_ep(struct usb_ep *ep)
1030 {
1031         return container_of(ep, struct s3c2410_ep, ep);
1032 }
1033
1034 static inline struct s3c2410_udc *to_s3c2410_udc(struct usb_gadget *gadget)
1035 {
1036         return container_of(gadget, struct s3c2410_udc, gadget);
1037 }
1038
1039 static inline struct s3c2410_request *to_s3c2410_req(struct usb_request *req)
1040 {
1041         return container_of(req, struct s3c2410_request, req);
1042 }
1043
1044 /*
1045  *      s3c2410_udc_ep_enable
1046  */
1047 static int s3c2410_udc_ep_enable(struct usb_ep *_ep,
1048                                  const struct usb_endpoint_descriptor *desc)
1049 {
1050         struct s3c2410_udc      *dev;
1051         struct s3c2410_ep       *ep;
1052         u32                     max, tmp;
1053         unsigned long           flags;
1054         u32                     csr1,csr2;
1055         u32                     int_en_reg;
1056
1057         ep = to_s3c2410_ep(_ep);
1058
1059         if (!_ep || !desc || ep->desc
1060                         || _ep->name == ep0name
1061                         || desc->bDescriptorType != USB_DT_ENDPOINT)
1062                 return -EINVAL;
1063
1064         dev = ep->dev;
1065         if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
1066                 return -ESHUTDOWN;
1067
1068         max = le16_to_cpu(desc->wMaxPacketSize) & 0x1fff;
1069
1070         local_irq_save (flags);
1071         _ep->maxpacket = max & 0x7ff;
1072         ep->desc = desc;
1073         ep->halted = 0;
1074         ep->bEndpointAddress = desc->bEndpointAddress;
1075
1076         /* set max packet */
1077         udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1078         udc_write(max >> 3, S3C2410_UDC_MAXP_REG);
1079
1080         /* set type, direction, address; reset fifo counters */
1081         if (desc->bEndpointAddress & USB_DIR_IN) {
1082                 csr1 = S3C2410_UDC_ICSR1_FFLUSH|S3C2410_UDC_ICSR1_CLRDT;
1083                 csr2 = S3C2410_UDC_ICSR2_MODEIN|S3C2410_UDC_ICSR2_DMAIEN;
1084
1085                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1086                 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1087                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1088                 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1089         } else {
1090                 /* don't flush in fifo or it will cause endpoint interrupt */
1091                 csr1 = S3C2410_UDC_ICSR1_CLRDT;
1092                 csr2 = S3C2410_UDC_ICSR2_DMAIEN;
1093
1094                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1095                 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1096                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1097                 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1098
1099                 csr1 = S3C2410_UDC_OCSR1_FFLUSH | S3C2410_UDC_OCSR1_CLRDT;
1100                 csr2 = S3C2410_UDC_OCSR2_DMAIEN;
1101
1102                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1103                 udc_write(csr1, S3C2410_UDC_OUT_CSR1_REG);
1104                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1105                 udc_write(csr2, S3C2410_UDC_OUT_CSR2_REG);
1106         }
1107
1108         /* enable irqs */
1109         int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1110         udc_write(int_en_reg | (1 << ep->num), S3C2410_UDC_EP_INT_EN_REG);
1111
1112         /* print some debug message */
1113         tmp = desc->bEndpointAddress;
1114         dprintk (DEBUG_NORMAL, "enable %s(%d) ep%x%s-blk max %02x\n",
1115                  _ep->name,ep->num, tmp,
1116                  desc->bEndpointAddress & USB_DIR_IN ? "in" : "out", max);
1117
1118         local_irq_restore (flags);
1119         s3c2410_udc_set_halt(_ep, 0);
1120
1121         return 0;
1122 }
1123
1124 /*
1125  * s3c2410_udc_ep_disable
1126  */
1127 static int s3c2410_udc_ep_disable(struct usb_ep *_ep)
1128 {
1129         struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1130         unsigned long flags;
1131         u32 int_en_reg;
1132
1133         if (!_ep || !ep->desc) {
1134                 dprintk(DEBUG_NORMAL, "%s not enabled\n",
1135                         _ep ? ep->ep.name : NULL);
1136                 return -EINVAL;
1137         }
1138
1139         local_irq_save(flags);
1140
1141         dprintk(DEBUG_NORMAL, "ep_disable: %s\n", _ep->name);
1142
1143         ep->desc = NULL;
1144         ep->halted = 1;
1145
1146         s3c2410_udc_nuke (ep->dev, ep, -ESHUTDOWN);
1147
1148         /* disable irqs */
1149         int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1150         udc_write(int_en_reg & ~(1<<ep->num), S3C2410_UDC_EP_INT_EN_REG);
1151
1152         local_irq_restore(flags);
1153
1154         dprintk(DEBUG_NORMAL, "%s disabled\n", _ep->name);
1155
1156         return 0;
1157 }
1158
1159 /*
1160  * s3c2410_udc_alloc_request
1161  */
1162 static struct usb_request *
1163 s3c2410_udc_alloc_request(struct usb_ep *_ep, gfp_t mem_flags)
1164 {
1165         struct s3c2410_request *req;
1166
1167         dprintk(DEBUG_VERBOSE,"%s(%p,%d)\n", __func__, _ep, mem_flags);
1168
1169         if (!_ep)
1170                 return NULL;
1171
1172         req = kzalloc (sizeof(struct s3c2410_request), mem_flags);
1173         if (!req)
1174                 return NULL;
1175
1176         INIT_LIST_HEAD (&req->queue);
1177         return &req->req;
1178 }
1179
1180 /*
1181  * s3c2410_udc_free_request
1182  */
1183 static void
1184 s3c2410_udc_free_request(struct usb_ep *_ep, struct usb_request *_req)
1185 {
1186         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1187         struct s3c2410_request  *req = to_s3c2410_req(_req);
1188
1189         dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1190
1191         if (!ep || !_req || (!ep->desc && _ep->name != ep0name))
1192                 return;
1193
1194         WARN_ON (!list_empty (&req->queue));
1195         kfree(req);
1196 }
1197
1198 /*
1199  *      s3c2410_udc_queue
1200  */
1201 static int s3c2410_udc_queue(struct usb_ep *_ep, struct usb_request *_req,
1202                 gfp_t gfp_flags)
1203 {
1204         struct s3c2410_request  *req = to_s3c2410_req(_req);
1205         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1206         struct s3c2410_udc      *dev;
1207         u32                     ep_csr = 0;
1208         int                     fifo_count = 0;
1209         unsigned long           flags;
1210
1211         if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1212                 dprintk(DEBUG_NORMAL, "%s: invalid args\n", __func__);
1213                 return -EINVAL;
1214         }
1215
1216         dev = ep->dev;
1217         if (unlikely (!dev->driver
1218                         || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
1219                 return -ESHUTDOWN;
1220         }
1221
1222         local_irq_save (flags);
1223
1224         if (unlikely(!_req || !_req->complete
1225                         || !_req->buf || !list_empty(&req->queue))) {
1226                 if (!_req)
1227                         dprintk(DEBUG_NORMAL, "%s: 1 X X X\n", __func__);
1228                 else {
1229                         dprintk(DEBUG_NORMAL, "%s: 0 %01d %01d %01d\n",
1230                                 __func__, !_req->complete,!_req->buf,
1231                                 !list_empty(&req->queue));
1232                 }
1233
1234                 local_irq_restore(flags);
1235                 return -EINVAL;
1236         }
1237
1238         _req->status = -EINPROGRESS;
1239         _req->actual = 0;
1240
1241         dprintk(DEBUG_VERBOSE, "%s: ep%x len %d\n",
1242                  __func__, ep->bEndpointAddress, _req->length);
1243
1244         if (ep->bEndpointAddress) {
1245                 udc_write(ep->bEndpointAddress & 0x7F, S3C2410_UDC_INDEX_REG);
1246
1247                 ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
1248                                 ? S3C2410_UDC_IN_CSR1_REG
1249                                 : S3C2410_UDC_OUT_CSR1_REG);
1250                 fifo_count = s3c2410_udc_fifo_count_out();
1251         } else {
1252                 udc_write(0, S3C2410_UDC_INDEX_REG);
1253                 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
1254                 fifo_count = s3c2410_udc_fifo_count_out();
1255         }
1256
1257         /* kickstart this i/o queue? */
1258         if (list_empty(&ep->queue) && !ep->halted) {
1259                 if (ep->bEndpointAddress == 0 /* ep0 */) {
1260                         switch (dev->ep0state) {
1261                         case EP0_IN_DATA_PHASE:
1262                                 if (!(ep_csr&S3C2410_UDC_EP0_CSR_IPKRDY)
1263                                                 && s3c2410_udc_write_fifo(ep,
1264                                                         req)) {
1265                                         dev->ep0state = EP0_IDLE;
1266                                         req = NULL;
1267                                 }
1268                                 break;
1269
1270                         case EP0_OUT_DATA_PHASE:
1271                                 if ((!_req->length)
1272                                         || ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1273                                                 && s3c2410_udc_read_fifo(ep,
1274                                                         req))) {
1275                                         dev->ep0state = EP0_IDLE;
1276                                         req = NULL;
1277                                 }
1278                                 break;
1279
1280                         default:
1281                                 local_irq_restore(flags);
1282                                 return -EL2HLT;
1283                         }
1284                 } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0
1285                                 && (!(ep_csr&S3C2410_UDC_OCSR1_PKTRDY))
1286                                 && s3c2410_udc_write_fifo(ep, req)) {
1287                         req = NULL;
1288                 } else if ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1289                                 && fifo_count
1290                                 && s3c2410_udc_read_fifo(ep, req)) {
1291                         req = NULL;
1292                 }
1293         }
1294
1295         /* pio or dma irq handler advances the queue. */
1296         if (likely (req != 0))
1297                 list_add_tail(&req->queue, &ep->queue);
1298
1299         local_irq_restore(flags);
1300
1301         dprintk(DEBUG_VERBOSE, "%s ok\n", __func__);
1302         return 0;
1303 }
1304
1305 /*
1306  *      s3c2410_udc_dequeue
1307  */
1308 static int s3c2410_udc_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1309 {
1310         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1311         struct s3c2410_udc      *udc;
1312         int                     retval = -EINVAL;
1313         unsigned long           flags;
1314         struct s3c2410_request  *req = NULL;
1315
1316         dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1317
1318         if (!the_controller->driver)
1319                 return -ESHUTDOWN;
1320
1321         if (!_ep || !_req)
1322                 return retval;
1323
1324         udc = to_s3c2410_udc(ep->gadget);
1325
1326         local_irq_save (flags);
1327
1328         list_for_each_entry (req, &ep->queue, queue) {
1329                 if (&req->req == _req) {
1330                         list_del_init (&req->queue);
1331                         _req->status = -ECONNRESET;
1332                         retval = 0;
1333                         break;
1334                 }
1335         }
1336
1337         if (retval == 0) {
1338                 dprintk(DEBUG_VERBOSE,
1339                         "dequeued req %p from %s, len %d buf %p\n",
1340                         req, _ep->name, _req->length, _req->buf);
1341
1342                 s3c2410_udc_done(ep, req, -ECONNRESET);
1343         }
1344
1345         local_irq_restore (flags);
1346         return retval;
1347 }
1348
1349 /*
1350  * s3c2410_udc_set_halt
1351  */
1352 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value)
1353 {
1354         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1355         u32                     ep_csr = 0;
1356         unsigned long           flags;
1357         u32                     idx;
1358
1359         if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1360                 dprintk(DEBUG_NORMAL, "%s: inval 2\n", __func__);
1361                 return -EINVAL;
1362         }
1363
1364         local_irq_save (flags);
1365
1366         idx = ep->bEndpointAddress & 0x7F;
1367
1368         if (idx == 0) {
1369                 s3c2410_udc_set_ep0_ss(base_addr);
1370                 s3c2410_udc_set_ep0_de_out(base_addr);
1371         } else {
1372                 udc_write(idx, S3C2410_UDC_INDEX_REG);
1373                 ep_csr = udc_read((ep->bEndpointAddress &USB_DIR_IN)
1374                                 ? S3C2410_UDC_IN_CSR1_REG
1375                                 : S3C2410_UDC_OUT_CSR1_REG);
1376
1377                 if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
1378                         if (value)
1379                                 udc_write(ep_csr | S3C2410_UDC_ICSR1_SENDSTL,
1380                                         S3C2410_UDC_IN_CSR1_REG);
1381                         else {
1382                                 ep_csr &= ~S3C2410_UDC_ICSR1_SENDSTL;
1383                                 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1384                                 ep_csr |= S3C2410_UDC_ICSR1_CLRDT;
1385                                 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1386                         }
1387                 } else {
1388                         if (value)
1389                                 udc_write(ep_csr | S3C2410_UDC_OCSR1_SENDSTL,
1390                                         S3C2410_UDC_OUT_CSR1_REG);
1391                         else {
1392                                 ep_csr &= ~S3C2410_UDC_OCSR1_SENDSTL;
1393                                 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1394                                 ep_csr |= S3C2410_UDC_OCSR1_CLRDT;
1395                                 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1396                         }
1397                 }
1398         }
1399
1400         ep->halted = value ? 1 : 0;
1401         local_irq_restore (flags);
1402
1403         return 0;
1404 }
1405
1406 static const struct usb_ep_ops s3c2410_ep_ops = {
1407         .enable         = s3c2410_udc_ep_enable,
1408         .disable        = s3c2410_udc_ep_disable,
1409
1410         .alloc_request  = s3c2410_udc_alloc_request,
1411         .free_request   = s3c2410_udc_free_request,
1412
1413         .queue          = s3c2410_udc_queue,
1414         .dequeue        = s3c2410_udc_dequeue,
1415
1416         .set_halt       = s3c2410_udc_set_halt,
1417 };
1418
1419 /*------------------------- usb_gadget_ops ----------------------------------*/
1420
1421 /*
1422  *      s3c2410_udc_get_frame
1423  */
1424 static int s3c2410_udc_get_frame(struct usb_gadget *_gadget)
1425 {
1426         int tmp;
1427
1428         dprintk(DEBUG_VERBOSE, "%s()\n", __func__);
1429
1430         tmp = udc_read(S3C2410_UDC_FRAME_NUM2_REG) << 8;
1431         tmp |= udc_read(S3C2410_UDC_FRAME_NUM1_REG);
1432         return tmp;
1433 }
1434
1435 /*
1436  *      s3c2410_udc_wakeup
1437  */
1438 static int s3c2410_udc_wakeup(struct usb_gadget *_gadget)
1439 {
1440         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1441         return 0;
1442 }
1443
1444 /*
1445  *      s3c2410_udc_set_selfpowered
1446  */
1447 static int s3c2410_udc_set_selfpowered(struct usb_gadget *gadget, int value)
1448 {
1449         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1450
1451         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1452
1453         if (value)
1454                 udc->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
1455         else
1456                 udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
1457
1458         return 0;
1459 }
1460
1461 static void s3c2410_udc_disable(struct s3c2410_udc *dev);
1462 static void s3c2410_udc_enable(struct s3c2410_udc *dev);
1463
1464 static int s3c2410_udc_set_pullup(struct s3c2410_udc *udc, int is_on)
1465 {
1466         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1467
1468         if (udc_info && udc_info->udc_command) {
1469                 if (is_on)
1470                         s3c2410_udc_enable(udc);
1471                 else {
1472                         if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
1473                                 if (udc->driver && udc->driver->disconnect)
1474                                         udc->driver->disconnect(&udc->gadget);
1475
1476                         }
1477                         s3c2410_udc_disable(udc);
1478                 }
1479         }
1480         else
1481                 return -EOPNOTSUPP;
1482
1483         return 0;
1484 }
1485
1486 static int s3c2410_udc_vbus_session(struct usb_gadget *gadget, int is_active)
1487 {
1488         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1489
1490         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1491
1492         udc->vbus = (is_active != 0);
1493         s3c2410_udc_set_pullup(udc, is_active);
1494         return 0;
1495 }
1496
1497 static int s3c2410_udc_pullup(struct usb_gadget *gadget, int is_on)
1498 {
1499         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1500
1501         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1502
1503         s3c2410_udc_set_pullup(udc, is_on ? 0 : 1);
1504         return 0;
1505 }
1506
1507 static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev)
1508 {
1509         struct s3c2410_udc      *dev = _dev;
1510         unsigned int            value;
1511
1512         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1513
1514         /* some cpus cannot read from an line configured to IRQ! */
1515         s3c2410_gpio_cfgpin(udc_info->vbus_pin, S3C2410_GPIO_INPUT);
1516         value = s3c2410_gpio_getpin(udc_info->vbus_pin);
1517         s3c2410_gpio_cfgpin(udc_info->vbus_pin, S3C2410_GPIO_SFN2);
1518
1519         if (udc_info->vbus_pin_inverted)
1520                 value = !value;
1521
1522         if (value != dev->vbus)
1523                 s3c2410_udc_vbus_session(&dev->gadget, value);
1524
1525         return IRQ_HANDLED;
1526 }
1527
1528 static int s3c2410_vbus_draw(struct usb_gadget *_gadget, unsigned ma)
1529 {
1530         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1531
1532         if (udc_info && udc_info->vbus_draw) {
1533                 udc_info->vbus_draw(ma);
1534                 return 0;
1535         }
1536
1537         return -ENOTSUPP;
1538 }
1539
1540 static const struct usb_gadget_ops s3c2410_ops = {
1541         .get_frame              = s3c2410_udc_get_frame,
1542         .wakeup                 = s3c2410_udc_wakeup,
1543         .set_selfpowered        = s3c2410_udc_set_selfpowered,
1544         .pullup                 = s3c2410_udc_pullup,
1545         .vbus_session           = s3c2410_udc_vbus_session,
1546         .vbus_draw              = s3c2410_vbus_draw,
1547 };
1548
1549 /*------------------------- gadget driver handling---------------------------*/
1550 /*
1551  * s3c2410_udc_disable
1552  */
1553 static void s3c2410_udc_disable(struct s3c2410_udc *dev)
1554 {
1555         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1556
1557         /* Disable all interrupts */
1558         udc_write(0x00, S3C2410_UDC_USB_INT_EN_REG);
1559         udc_write(0x00, S3C2410_UDC_EP_INT_EN_REG);
1560
1561         /* Clear the interrupt registers */
1562         udc_write(S3C2410_UDC_USBINT_RESET
1563                                 | S3C2410_UDC_USBINT_RESUME
1564                                 | S3C2410_UDC_USBINT_SUSPEND,
1565                         S3C2410_UDC_USB_INT_REG);
1566
1567         udc_write(0x1F, S3C2410_UDC_EP_INT_REG);
1568
1569         /* Good bye, cruel world */
1570         if (udc_info && udc_info->udc_command)
1571                 udc_info->udc_command(S3C2410_UDC_P_DISABLE);
1572
1573         /* Set speed to unknown */
1574         dev->gadget.speed = USB_SPEED_UNKNOWN;
1575 }
1576
1577 /*
1578  * s3c2410_udc_reinit
1579  */
1580 static void s3c2410_udc_reinit(struct s3c2410_udc *dev)
1581 {
1582         u32 i;
1583
1584         /* device/ep0 records init */
1585         INIT_LIST_HEAD (&dev->gadget.ep_list);
1586         INIT_LIST_HEAD (&dev->gadget.ep0->ep_list);
1587         dev->ep0state = EP0_IDLE;
1588
1589         for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1590                 struct s3c2410_ep *ep = &dev->ep[i];
1591
1592                 if (i != 0)
1593                         list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
1594
1595                 ep->dev = dev;
1596                 ep->desc = NULL;
1597                 ep->halted = 0;
1598                 INIT_LIST_HEAD (&ep->queue);
1599         }
1600 }
1601
1602 /*
1603  * s3c2410_udc_enable
1604  */
1605 static void s3c2410_udc_enable(struct s3c2410_udc *dev)
1606 {
1607         int i;
1608
1609         dprintk(DEBUG_NORMAL, "s3c2410_udc_enable called\n");
1610
1611         /* dev->gadget.speed = USB_SPEED_UNKNOWN; */
1612         dev->gadget.speed = USB_SPEED_FULL;
1613
1614         /* Set MAXP for all endpoints */
1615         for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1616                 udc_write(i, S3C2410_UDC_INDEX_REG);
1617                 udc_write((dev->ep[i].ep.maxpacket & 0x7ff) >> 3,
1618                                 S3C2410_UDC_MAXP_REG);
1619         }
1620
1621         /* Set default power state */
1622         udc_write(DEFAULT_POWER_STATE, S3C2410_UDC_PWR_REG);
1623
1624         /* Enable reset and suspend interrupt interrupts */
1625         udc_write(S3C2410_UDC_USBINT_RESET | S3C2410_UDC_USBINT_SUSPEND,
1626                         S3C2410_UDC_USB_INT_EN_REG);
1627
1628         /* Enable ep0 interrupt */
1629         udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_EN_REG);
1630
1631         /* time to say "hello, world" */
1632         if (udc_info && udc_info->udc_command)
1633                 udc_info->udc_command(S3C2410_UDC_P_ENABLE);
1634 }
1635
1636 /*
1637  *      usb_gadget_register_driver
1638  */
1639 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
1640 {
1641         struct s3c2410_udc *udc = the_controller;
1642         int             retval;
1643
1644         dprintk(DEBUG_NORMAL, "usb_gadget_register_driver() '%s'\n",
1645                 driver->driver.name);
1646
1647         /* Sanity checks */
1648         if (!udc)
1649                 return -ENODEV;
1650
1651         if (udc->driver)
1652                 return -EBUSY;
1653
1654         if (!driver->bind || !driver->setup
1655                         || driver->speed != USB_SPEED_FULL) {
1656                 printk(KERN_ERR "Invalid driver: bind %p setup %p speed %d\n",
1657                         driver->bind, driver->setup, driver->speed);
1658                 return -EINVAL;
1659         }
1660 #if defined(MODULE)
1661         if (!driver->unbind) {
1662                 printk(KERN_ERR "Invalid driver: no unbind method\n");
1663                 return -EINVAL;
1664         }
1665 #endif
1666
1667         /* Hook the driver */
1668         udc->driver = driver;
1669         udc->gadget.dev.driver = &driver->driver;
1670
1671         /* Bind the driver */
1672         if ((retval = device_add(&udc->gadget.dev)) != 0) {
1673                 printk(KERN_ERR "Error in device_add() : %d\n",retval);
1674                 goto register_error;
1675         }
1676
1677         dprintk(DEBUG_NORMAL, "binding gadget driver '%s'\n",
1678                 driver->driver.name);
1679
1680         if ((retval = driver->bind (&udc->gadget)) != 0) {
1681                 device_del(&udc->gadget.dev);
1682                 goto register_error;
1683         }
1684
1685         /* Enable udc */
1686         s3c2410_udc_enable(udc);
1687
1688         return 0;
1689
1690 register_error:
1691         udc->driver = NULL;
1692         udc->gadget.dev.driver = NULL;
1693         return retval;
1694 }
1695
1696 /*
1697  *      usb_gadget_unregister_driver
1698  */
1699 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
1700 {
1701         struct s3c2410_udc *udc = the_controller;
1702
1703         if (!udc)
1704                 return -ENODEV;
1705
1706         if (!driver || driver != udc->driver || !driver->unbind)
1707                 return -EINVAL;
1708
1709         dprintk(DEBUG_NORMAL,"usb_gadget_register_driver() '%s'\n",
1710                 driver->driver.name);
1711
1712         if (driver->disconnect)
1713                 driver->disconnect(&udc->gadget);
1714
1715         device_del(&udc->gadget.dev);
1716         udc->driver = NULL;
1717
1718         /* Disable udc */
1719         s3c2410_udc_disable(udc);
1720
1721         return 0;
1722 }
1723
1724 /*---------------------------------------------------------------------------*/
1725 static struct s3c2410_udc memory = {
1726         .gadget = {
1727                 .ops            = &s3c2410_ops,
1728                 .ep0            = &memory.ep[0].ep,
1729                 .name           = gadget_name,
1730                 .dev = {
1731                         .bus_id         = "gadget",
1732                 },
1733         },
1734
1735         /* control endpoint */
1736         .ep[0] = {
1737                 .num            = 0,
1738                 .ep = {
1739                         .name           = ep0name,
1740                         .ops            = &s3c2410_ep_ops,
1741                         .maxpacket      = EP0_FIFO_SIZE,
1742                 },
1743                 .dev            = &memory,
1744         },
1745
1746         /* first group of endpoints */
1747         .ep[1] = {
1748                 .num            = 1,
1749                 .ep = {
1750                         .name           = "ep1-bulk",
1751                         .ops            = &s3c2410_ep_ops,
1752                         .maxpacket      = EP_FIFO_SIZE,
1753                 },
1754                 .dev            = &memory,
1755                 .fifo_size      = EP_FIFO_SIZE,
1756                 .bEndpointAddress = 1,
1757                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1758         },
1759         .ep[2] = {
1760                 .num            = 2,
1761                 .ep = {
1762                         .name           = "ep2-bulk",
1763                         .ops            = &s3c2410_ep_ops,
1764                         .maxpacket      = EP_FIFO_SIZE,
1765                 },
1766                 .dev            = &memory,
1767                 .fifo_size      = EP_FIFO_SIZE,
1768                 .bEndpointAddress = 2,
1769                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1770         },
1771         .ep[3] = {
1772                 .num            = 3,
1773                 .ep = {
1774                         .name           = "ep3-bulk",
1775                         .ops            = &s3c2410_ep_ops,
1776                         .maxpacket      = EP_FIFO_SIZE,
1777                 },
1778                 .dev            = &memory,
1779                 .fifo_size      = EP_FIFO_SIZE,
1780                 .bEndpointAddress = 3,
1781                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1782         },
1783         .ep[4] = {
1784                 .num            = 4,
1785                 .ep = {
1786                         .name           = "ep4-bulk",
1787                         .ops            = &s3c2410_ep_ops,
1788                         .maxpacket      = EP_FIFO_SIZE,
1789                 },
1790                 .dev            = &memory,
1791                 .fifo_size      = EP_FIFO_SIZE,
1792                 .bEndpointAddress = 4,
1793                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1794         }
1795
1796 };
1797
1798 /*
1799  *      probe - binds to the platform device
1800  */
1801 static int s3c2410_udc_probe(struct platform_device *pdev)
1802 {
1803         struct s3c2410_udc *udc = &memory;
1804         struct device *dev = &pdev->dev;
1805         int retval;
1806         unsigned int irq;
1807
1808         dev_dbg(dev, "%s()\n", __func__);
1809
1810         usb_bus_clock = clk_get(NULL, "usb-bus-gadget");
1811         if (IS_ERR(usb_bus_clock)) {
1812                 dev_err(dev, "failed to get usb bus clock source\n");
1813                 return PTR_ERR(usb_bus_clock);
1814         }
1815
1816         clk_enable(usb_bus_clock);
1817
1818         udc_clock = clk_get(NULL, "usb-device");
1819         if (IS_ERR(udc_clock)) {
1820                 dev_err(dev, "failed to get udc clock source\n");
1821                 return PTR_ERR(udc_clock);
1822         }
1823
1824         clk_enable(udc_clock);
1825
1826         mdelay(10);
1827
1828         dev_dbg(dev, "got and enabled clocks\n");
1829
1830         if (strncmp(pdev->name, "s3c2440", 7) == 0) {
1831                 dev_info(dev, "S3C2440: increasing FIFO to 128 bytes\n");
1832                 memory.ep[1].fifo_size = S3C2440_EP_FIFO_SIZE;
1833                 memory.ep[2].fifo_size = S3C2440_EP_FIFO_SIZE;
1834                 memory.ep[3].fifo_size = S3C2440_EP_FIFO_SIZE;
1835                 memory.ep[4].fifo_size = S3C2440_EP_FIFO_SIZE;
1836         }
1837
1838         spin_lock_init (&udc->lock);
1839         udc_info = pdev->dev.platform_data;
1840
1841         rsrc_start = S3C2410_PA_USBDEV;
1842         rsrc_len   = S3C24XX_SZ_USBDEV;
1843
1844         if (!request_mem_region(rsrc_start, rsrc_len, gadget_name))
1845                 return -EBUSY;
1846
1847         base_addr = ioremap(rsrc_start, rsrc_len);
1848         if (!base_addr) {
1849                 retval = -ENOMEM;
1850                 goto err_mem;
1851         }
1852
1853         device_initialize(&udc->gadget.dev);
1854         udc->gadget.dev.parent = &pdev->dev;
1855         udc->gadget.dev.dma_mask = pdev->dev.dma_mask;
1856
1857         the_controller = udc;
1858         platform_set_drvdata(pdev, udc);
1859
1860         s3c2410_udc_disable(udc);
1861         s3c2410_udc_reinit(udc);
1862
1863         /* irq setup after old hardware state is cleaned up */
1864         retval = request_irq(IRQ_USBD, s3c2410_udc_irq,
1865                         IRQF_DISABLED, gadget_name, udc);
1866
1867         if (retval != 0) {
1868                 dev_err(dev, "cannot get irq %i, err %d\n", IRQ_USBD, retval);
1869                 retval = -EBUSY;
1870                 goto err_map;
1871         }
1872
1873         dev_dbg(dev, "got irq %i\n", IRQ_USBD);
1874
1875         if (udc_info && udc_info->vbus_pin > 0) {
1876                 irq = s3c2410_gpio_getirq(udc_info->vbus_pin);
1877                 retval = request_irq(irq, s3c2410_udc_vbus_irq,
1878                                      IRQF_DISABLED | IRQF_TRIGGER_RISING
1879                                      | IRQF_TRIGGER_FALLING | IRQF_SHARED,
1880                                      gadget_name, udc);
1881
1882                 if (retval != 0) {
1883                         dev_err(dev, "can't get vbus irq %i, err %d\n",
1884                                 irq, retval);
1885                         retval = -EBUSY;
1886                         goto err_int;
1887                 }
1888
1889                 dev_dbg(dev, "got irq %i\n", irq);
1890         } else {
1891                 udc->vbus = 1;
1892         }
1893
1894         if (s3c2410_udc_debugfs_root) {
1895                 udc->regs_info = debugfs_create_file("registers", S_IRUGO,
1896                                 s3c2410_udc_debugfs_root,
1897                                 udc, &s3c2410_udc_debugfs_fops);
1898                 if (IS_ERR(udc->regs_info)) {
1899                         dev_warn(dev, "debugfs file creation failed %ld\n",
1900                                  PTR_ERR(udc->regs_info));
1901                         udc->regs_info = NULL;
1902                 }
1903         }
1904
1905         dev_dbg(dev, "probe ok\n");
1906
1907         return 0;
1908
1909 err_int:
1910         free_irq(IRQ_USBD, udc);
1911 err_map:
1912         iounmap(base_addr);
1913 err_mem:
1914         release_mem_region(rsrc_start, rsrc_len);
1915
1916         return retval;
1917 }
1918
1919 /*
1920  *      s3c2410_udc_remove
1921  */
1922 static int s3c2410_udc_remove(struct platform_device *pdev)
1923 {
1924         struct s3c2410_udc *udc = platform_get_drvdata(pdev);
1925         unsigned int irq;
1926
1927         dev_dbg(&pdev->dev, "%s()\n", __func__);
1928         if (udc->driver)
1929                 return -EBUSY;
1930
1931         debugfs_remove(udc->regs_info);
1932
1933         if (udc_info && udc_info->vbus_pin > 0) {
1934                 irq = s3c2410_gpio_getirq(udc_info->vbus_pin);
1935                 free_irq(irq, udc);
1936         }
1937
1938         free_irq(IRQ_USBD, udc);
1939
1940         iounmap(base_addr);
1941         release_mem_region(rsrc_start, rsrc_len);
1942
1943         platform_set_drvdata(pdev, NULL);
1944
1945         if (!IS_ERR(udc_clock) && udc_clock != NULL) {
1946                 clk_disable(udc_clock);
1947                 clk_put(udc_clock);
1948                 udc_clock = NULL;
1949         }
1950
1951         if (!IS_ERR(usb_bus_clock) && usb_bus_clock != NULL) {
1952                 clk_disable(usb_bus_clock);
1953                 clk_put(usb_bus_clock);
1954                 usb_bus_clock = NULL;
1955         }
1956
1957         dev_dbg(&pdev->dev, "%s: remove ok\n", __func__);
1958         return 0;
1959 }
1960
1961 #ifdef CONFIG_PM
1962 static int s3c2410_udc_suspend(struct platform_device *pdev, pm_message_t message)
1963 {
1964         if (udc_info && udc_info->udc_command)
1965                 udc_info->udc_command(S3C2410_UDC_P_DISABLE);
1966
1967         return 0;
1968 }
1969
1970 static int s3c2410_udc_resume(struct platform_device *pdev)
1971 {
1972         if (udc_info && udc_info->udc_command)
1973                 udc_info->udc_command(S3C2410_UDC_P_ENABLE);
1974
1975         return 0;
1976 }
1977 #else
1978 #define s3c2410_udc_suspend     NULL
1979 #define s3c2410_udc_resume      NULL
1980 #endif
1981
1982 static struct platform_driver udc_driver_2410 = {
1983         .driver         = {
1984                 .name   = "s3c2410-usbgadget",
1985                 .owner  = THIS_MODULE,
1986         },
1987         .probe          = s3c2410_udc_probe,
1988         .remove         = s3c2410_udc_remove,
1989         .suspend        = s3c2410_udc_suspend,
1990         .resume         = s3c2410_udc_resume,
1991 };
1992
1993 static struct platform_driver udc_driver_2440 = {
1994         .driver         = {
1995                 .name   = "s3c2440-usbgadget",
1996                 .owner  = THIS_MODULE,
1997         },
1998         .probe          = s3c2410_udc_probe,
1999         .remove         = s3c2410_udc_remove,
2000         .suspend        = s3c2410_udc_suspend,
2001         .resume         = s3c2410_udc_resume,
2002 };
2003
2004 static int __init udc_init(void)
2005 {
2006         int retval;
2007
2008         dprintk(DEBUG_NORMAL, "%s: version %s\n", gadget_name, DRIVER_VERSION);
2009
2010         s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name, NULL);
2011         if (IS_ERR(s3c2410_udc_debugfs_root)) {
2012                 printk(KERN_ERR "%s: debugfs dir creation failed %ld\n",
2013                         gadget_name, PTR_ERR(s3c2410_udc_debugfs_root));
2014                 s3c2410_udc_debugfs_root = NULL;
2015         }
2016
2017         retval = platform_driver_register(&udc_driver_2410);
2018         if (retval)
2019                 goto err;
2020
2021         retval = platform_driver_register(&udc_driver_2440);
2022         if (retval)
2023                 goto err;
2024
2025         return 0;
2026
2027 err:
2028         debugfs_remove(s3c2410_udc_debugfs_root);
2029         return retval;
2030 }
2031
2032 static void __exit udc_exit(void)
2033 {
2034         platform_driver_unregister(&udc_driver_2410);
2035         platform_driver_unregister(&udc_driver_2440);
2036         debugfs_remove(s3c2410_udc_debugfs_root);
2037 }
2038
2039 EXPORT_SYMBOL(usb_gadget_unregister_driver);
2040 EXPORT_SYMBOL(usb_gadget_register_driver);
2041
2042 module_init(udc_init);
2043 module_exit(udc_exit);
2044
2045 MODULE_AUTHOR(DRIVER_AUTHOR);
2046 MODULE_DESCRIPTION(DRIVER_DESC);
2047 MODULE_VERSION(DRIVER_VERSION);
2048 MODULE_LICENSE("GPL");
2049 MODULE_ALIAS("platform:s3c2410-usbgadget");
2050 MODULE_ALIAS("platform:s3c2440-usbgadget");