Pileus Git - ~andy/linux/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
  15 #include <linux/module.h>
  16 #include <linux/kernel.h>
  17 #include <linux/delay.h>
  18 #include <linux/ioport.h>
  19 #include <linux/sched.h>
  20 #include <linux/slab.h>
  21 #include <linux/errno.h>
  22 #include <linux/init.h>
  23 #include <linux/timer.h>
  24 #include <linux/list.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/platform_device.h>
  27 #include <linux/clk.h>
  28 #include <linux/gpio.h>
  29 #include <linux/prefetch.h>
  30
  31 #include <linux/debugfs.h>
  32 #include <linux/seq_file.h>
  33
  34 #include <linux/usb.h>
  35 #include <linux/usb/gadget.h>
  36
  37 #include <asm/byteorder.h>
  38 #include <asm/io.h>
  39 #include <asm/irq.h>
  40 #include <asm/unaligned.h>
  41 #include <mach/irqs.h>
  42
  43 #include <mach/hardware.h>
  44
  45 #include <plat/regs-udc.h>
  46 #include <plat/udc.h>
  47
  48
  49 #include "s3c2410_udc.h"
  50
  51 #define DRIVER_DESC     "S3C2410 USB Device Controller Gadget"
  52 #define DRIVER_VERSION  "29 Apr 2007"
  53 #define DRIVER_AUTHOR   "Herbert Pötzl <herbert@13thfloor.at>, " \
  54                         "Arnaud Patard <arnaud.patard@rtp-net.org>"
  55
  56 static const char               gadget_name[] = "s3c2410_udc";
  57 static const char               driver_desc[] = DRIVER_DESC;
  58
  59 static struct s3c2410_udc       *the_controller;
  60 static struct clk               *udc_clock;
  61 static struct clk               *usb_bus_clock;
  62 static void __iomem             *base_addr;
  63 static u64                      rsrc_start;
  64 static u64                      rsrc_len;
  65 static struct dentry            *s3c2410_udc_debugfs_root;
  66
  67 static inline u32 udc_read(u32 reg)
  68 {
  69         return readb(base_addr + reg);
  70 }
  71
  72 static inline void udc_write(u32 value, u32 reg)
  73 {
  74         writeb(value, base_addr + reg);
  75 }
  76
  77 static inline void udc_writeb(void __iomem *base, u32 value, u32 reg)
  78 {
  79         writeb(value, base + reg);
  80 }
  81
  82 static struct s3c2410_udc_mach_info *udc_info;
  83
  84 /*************************** DEBUG FUNCTION ***************************/
  85 #define DEBUG_NORMAL    1
  86 #define DEBUG_VERBOSE   2
  87
  88 #ifdef CONFIG_USB_S3C2410_DEBUG
  89 #define USB_S3C2410_DEBUG_LEVEL 0
  90
  91 static uint32_t s3c2410_ticks = 0;
  92
  93 static int dprintk(int level, const char *fmt, ...)
  94 {
  95         static char printk_buf[1024];
  96         static long prevticks;
  97         static int invocation;
  98         va_list args;
  99         int len;
 100
 101         if (level > USB_S3C2410_DEBUG_LEVEL)
 102                 return 0;
 103
 104         if (s3c2410_ticks != prevticks) {
 105                 prevticks = s3c2410_ticks;
 106                 invocation = 0;
 107         }
 108
 109         len = scnprintf(printk_buf,
 110                         sizeof(printk_buf), "%1lu.%02d USB: ",
 111                         prevticks, invocation++);
 112
 113         va_start(args, fmt);
 114         len = vscnprintf(printk_buf+len,
 115                         sizeof(printk_buf)-len, fmt, args);
 116         va_end(args);
 117
 118         return printk(KERN_DEBUG "%s", printk_buf);
 119 }
 120 #else
 121 static int dprintk(int level, const char *fmt, ...)
 122 {
 123         return 0;
 124 }
 125 #endif
 126 static int s3c2410_udc_debugfs_seq_show(struct seq_file *m, void *p)
 127 {
 128         u32 addr_reg,pwr_reg,ep_int_reg,usb_int_reg;
 129         u32 ep_int_en_reg, usb_int_en_reg, ep0_csr;
 130         u32 ep1_i_csr1,ep1_i_csr2,ep1_o_csr1,ep1_o_csr2;
 131         u32 ep2_i_csr1,ep2_i_csr2,ep2_o_csr1,ep2_o_csr2;
 132
 133         addr_reg       = udc_read(S3C2410_UDC_FUNC_ADDR_REG);
 134         pwr_reg        = udc_read(S3C2410_UDC_PWR_REG);
 135         ep_int_reg     = udc_read(S3C2410_UDC_EP_INT_REG);
 136         usb_int_reg    = udc_read(S3C2410_UDC_USB_INT_REG);
 137         ep_int_en_reg  = udc_read(S3C2410_UDC_EP_INT_EN_REG);
 138         usb_int_en_reg = udc_read(S3C2410_UDC_USB_INT_EN_REG);
 139         udc_write(0, S3C2410_UDC_INDEX_REG);
 140         ep0_csr        = udc_read(S3C2410_UDC_IN_CSR1_REG);
 141         udc_write(1, S3C2410_UDC_INDEX_REG);
 142         ep1_i_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 143         ep1_i_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 144         ep1_o_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 145         ep1_o_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 146         udc_write(2, S3C2410_UDC_INDEX_REG);
 147         ep2_i_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 148         ep2_i_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 149         ep2_o_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 150         ep2_o_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 151
 152         seq_printf(m, "FUNC_ADDR_REG  : 0x%04X\n"
 153                  "PWR_REG        : 0x%04X\n"
 154                  "EP_INT_REG     : 0x%04X\n"
 155                  "USB_INT_REG    : 0x%04X\n"
 156                  "EP_INT_EN_REG  : 0x%04X\n"
 157                  "USB_INT_EN_REG : 0x%04X\n"
 158                  "EP0_CSR        : 0x%04X\n"
 159                  "EP1_I_CSR1     : 0x%04X\n"
 160                  "EP1_I_CSR2     : 0x%04X\n"
 161                  "EP1_O_CSR1     : 0x%04X\n"
 162                  "EP1_O_CSR2     : 0x%04X\n"
 163                  "EP2_I_CSR1     : 0x%04X\n"
 164                  "EP2_I_CSR2     : 0x%04X\n"
 165                  "EP2_O_CSR1     : 0x%04X\n"
 166                  "EP2_O_CSR2     : 0x%04X\n",
 167                         addr_reg,pwr_reg,ep_int_reg,usb_int_reg,
 168                         ep_int_en_reg, usb_int_en_reg, ep0_csr,
 169                         ep1_i_csr1,ep1_i_csr2,ep1_o_csr1,ep1_o_csr2,
 170                         ep2_i_csr1,ep2_i_csr2,ep2_o_csr1,ep2_o_csr2
 171                 );
 172
 173         return 0;
 174 }
 175
 176 static int s3c2410_udc_debugfs_fops_open(struct inode *inode,
 177                                          struct file *file)
 178 {
 179         return single_open(file, s3c2410_udc_debugfs_seq_show, NULL);
 180 }
 181
 182 static const struct file_operations s3c2410_udc_debugfs_fops = {
 183         .open           = s3c2410_udc_debugfs_fops_open,
 184         .read           = seq_read,
 185         .llseek         = seq_lseek,
 186         .release        = single_release,
 187         .owner          = THIS_MODULE,
 188 };
 189
 190 /* io macros */
 191
 192 static inline void s3c2410_udc_clear_ep0_opr(void __iomem *base)
 193 {
 194         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 195         udc_writeb(base, S3C2410_UDC_EP0_CSR_SOPKTRDY,
 196                         S3C2410_UDC_EP0_CSR_REG);
 197 }
 198
 199 static inline void s3c2410_udc_clear_ep0_sst(void __iomem *base)
 200 {
 201         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 202         writeb(0x00, base + S3C2410_UDC_EP0_CSR_REG);
 203 }
 204
 205 static inline void s3c2410_udc_clear_ep0_se(void __iomem *base)
 206 {
 207         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 208         udc_writeb(base, S3C2410_UDC_EP0_CSR_SSE, S3C2410_UDC_EP0_CSR_REG);
 209 }
 210
 211 static inline void s3c2410_udc_set_ep0_ipr(void __iomem *base)
 212 {
 213         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 214         udc_writeb(base, S3C2410_UDC_EP0_CSR_IPKRDY, S3C2410_UDC_EP0_CSR_REG);
 215 }
 216
 217 static inline void s3c2410_udc_set_ep0_de(void __iomem *base)
 218 {
 219         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 220         udc_writeb(base, S3C2410_UDC_EP0_CSR_DE, S3C2410_UDC_EP0_CSR_REG);
 221 }
 222
 223 inline void s3c2410_udc_set_ep0_ss(void __iomem *b)
 224 {
 225         udc_writeb(b, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 226         udc_writeb(b, S3C2410_UDC_EP0_CSR_SENDSTL, S3C2410_UDC_EP0_CSR_REG);
 227 }
 228
 229 static inline void s3c2410_udc_set_ep0_de_out(void __iomem *base)
 230 {
 231         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 232
 233         udc_writeb(base,(S3C2410_UDC_EP0_CSR_SOPKTRDY
 234                                 | S3C2410_UDC_EP0_CSR_DE),
 235                         S3C2410_UDC_EP0_CSR_REG);
 236 }
 237
 238 static inline void s3c2410_udc_set_ep0_sse_out(void __iomem *base)
 239 {
 240         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 241         udc_writeb(base, (S3C2410_UDC_EP0_CSR_SOPKTRDY
 242                                 | S3C2410_UDC_EP0_CSR_SSE),
 243                         S3C2410_UDC_EP0_CSR_REG);
 244 }
 245
 246 static inline void s3c2410_udc_set_ep0_de_in(void __iomem *base)
 247 {
 248         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 249         udc_writeb(base, (S3C2410_UDC_EP0_CSR_IPKRDY
 250                         | S3C2410_UDC_EP0_CSR_DE),
 251                 S3C2410_UDC_EP0_CSR_REG);
 252 }
 253
 254 /*------------------------- I/O ----------------------------------*/
 255
 256 /*
 257  *      s3c2410_udc_done
 258  */
 259 static void s3c2410_udc_done(struct s3c2410_ep *ep,
 260                 struct s3c2410_request *req, int status)
 261 {
 262         unsigned halted = ep->halted;
 263
 264         list_del_init(&req->queue);
 265
 266         if (likely (req->req.status == -EINPROGRESS))
 267                 req->req.status = status;
 268         else
 269                 status = req->req.status;
 270
 271         ep->halted = 1;
 272         req->req.complete(&ep->ep, &req->req);
 273         ep->halted = halted;
 274 }
 275
 276 static void s3c2410_udc_nuke(struct s3c2410_udc *udc,
 277                 struct s3c2410_ep *ep, int status)
 278 {
 279         /* Sanity check */
 280         if (&ep->queue == NULL)
 281                 return;
 282
 283         while (!list_empty (&ep->queue)) {
 284                 struct s3c2410_request *req;
 285                 req = list_entry (ep->queue.next, struct s3c2410_request,
 286                                 queue);
 287                 s3c2410_udc_done(ep, req, status);
 288         }
 289 }
 290
 291 static inline void s3c2410_udc_clear_ep_state(struct s3c2410_udc *dev)
 292 {
 293         unsigned i;
 294
 295         /* hardware SET_{CONFIGURATION,INTERFACE} automagic resets endpoint
 296          * fifos, and pending transactions mustn't be continued in any case.
 297          */
 298
 299         for (i = 1; i < S3C2410_ENDPOINTS; i++)
 300                 s3c2410_udc_nuke(dev, &dev->ep[i], -ECONNABORTED);
 301 }
 302
 303 static inline int s3c2410_udc_fifo_count_out(void)
 304 {
 305         int tmp;
 306
 307         tmp = udc_read(S3C2410_UDC_OUT_FIFO_CNT2_REG) << 8;
 308         tmp |= udc_read(S3C2410_UDC_OUT_FIFO_CNT1_REG);
 309         return tmp;
 310 }
 311
 312 /*
 313  *      s3c2410_udc_write_packet
 314  */
 315 static inline int s3c2410_udc_write_packet(int fifo,
 316                 struct s3c2410_request *req,
 317                 unsigned max)
 318 {
 319         unsigned len = min(req->req.length - req->req.actual, max);
 320         u8 *buf = req->req.buf + req->req.actual;
 321
 322         prefetch(buf);
 323
 324         dprintk(DEBUG_VERBOSE, "%s %d %d %d %d\n", __func__,
 325                 req->req.actual, req->req.length, len, req->req.actual + len);
 326
 327         req->req.actual += len;
 328
 329         udelay(5);
 330         writesb(base_addr + fifo, buf, len);
 331         return len;
 332 }
 333
 334 /*
 335  *      s3c2410_udc_write_fifo
 336  *
 337  * return:  0 = still running, 1 = completed, negative = errno
 338  */
 339 static int s3c2410_udc_write_fifo(struct s3c2410_ep *ep,
 340                 struct s3c2410_request *req)
 341 {
 342         unsigned        count;
 343         int             is_last;
 344         u32             idx;
 345         int             fifo_reg;
 346         u32             ep_csr;
 347
 348         idx = ep->bEndpointAddress & 0x7F;
 349         switch (idx) {
 350         default:
 351                 idx = 0;
 352         case 0:
 353                 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
 354                 break;
 355         case 1:
 356                 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
 357                 break;
 358         case 2:
 359                 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
 360                 break;
 361         case 3:
 362                 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
 363                 break;
 364         case 4:
 365                 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
 366                 break;
 367         }
 368
 369         count = s3c2410_udc_write_packet(fifo_reg, req, ep->ep.maxpacket);
 370
 371         /* last packet is often short (sometimes a zlp) */
 372         if (count != ep->ep.maxpacket)
 373                 is_last = 1;
 374         else if (req->req.length != req->req.actual || req->req.zero)
 375                 is_last = 0;
 376         else
 377                 is_last = 2;
 378
 379         /* Only ep0 debug messages are interesting */
 380         if (idx == 0)
 381                 dprintk(DEBUG_NORMAL,
 382                         "Written ep%d %d.%d of %d b [last %d,z %d]\n",
 383                         idx, count, req->req.actual, req->req.length,
 384                         is_last, req->req.zero);
 385
 386         if (is_last) {
 387                 /* The order is important. It prevents sending 2 packets
 388                  * at the same time */
 389
 390                 if (idx == 0) {
 391                         /* Reset signal => no need to say 'data sent' */
 392                         if (! (udc_read(S3C2410_UDC_USB_INT_REG)
 393                                         & S3C2410_UDC_USBINT_RESET))
 394                                 s3c2410_udc_set_ep0_de_in(base_addr);
 395                         ep->dev->ep0state=EP0_IDLE;
 396                 } else {
 397                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 398                         ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 399                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 400                         udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
 401                                         S3C2410_UDC_IN_CSR1_REG);
 402                 }
 403
 404                 s3c2410_udc_done(ep, req, 0);
 405                 is_last = 1;
 406         } else {
 407                 if (idx == 0) {
 408                         /* Reset signal => no need to say 'data sent' */
 409                         if (! (udc_read(S3C2410_UDC_USB_INT_REG)
 410                                         & S3C2410_UDC_USBINT_RESET))
 411                                 s3c2410_udc_set_ep0_ipr(base_addr);
 412                 } else {
 413                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 414                         ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 415                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 416                         udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
 417                                         S3C2410_UDC_IN_CSR1_REG);
 418                 }
 419         }
 420
 421         return is_last;
 422 }
 423
 424 static inline int s3c2410_udc_read_packet(int fifo, u8 *buf,
 425                 struct s3c2410_request *req, unsigned avail)
 426 {
 427         unsigned len;
 428
 429         len = min(req->req.length - req->req.actual, avail);
 430         req->req.actual += len;
 431
 432         readsb(fifo + base_addr, buf, len);
 433         return len;
 434 }
 435
 436 /*
 437  * return:  0 = still running, 1 = queue empty, negative = errno
 438  */
 439 static int s3c2410_udc_read_fifo(struct s3c2410_ep *ep,
 440                                  struct s3c2410_request *req)
 441 {
 442         u8              *buf;
 443         u32             ep_csr;
 444         unsigned        bufferspace;
 445         int             is_last=1;
 446         unsigned        avail;
 447         int             fifo_count = 0;
 448         u32             idx;
 449         int             fifo_reg;
 450
 451         idx = ep->bEndpointAddress & 0x7F;
 452
 453         switch (idx) {
 454         default:
 455                 idx = 0;
 456         case 0:
 457                 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
 458                 break;
 459         case 1:
 460                 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
 461                 break;
 462         case 2:
 463                 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
 464                 break;
 465         case 3:
 466                 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
 467                 break;
 468         case 4:
 469                 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
 470                 break;
 471         }
 472
 473         if (!req->req.length)
 474                 return 1;
 475
 476         buf = req->req.buf + req->req.actual;
 477         bufferspace = req->req.length - req->req.actual;
 478         if (!bufferspace) {
 479                 dprintk(DEBUG_NORMAL, "%s: buffer full!\n", __func__);
 480                 return -1;
 481         }
 482
 483         udc_write(idx, S3C2410_UDC_INDEX_REG);
 484
 485         fifo_count = s3c2410_udc_fifo_count_out();
 486         dprintk(DEBUG_NORMAL, "%s fifo count : %d\n", __func__, fifo_count);
 487
 488         if (fifo_count > ep->ep.maxpacket)
 489                 avail = ep->ep.maxpacket;
 490         else
 491                 avail = fifo_count;
 492
 493         fifo_count = s3c2410_udc_read_packet(fifo_reg, buf, req, avail);
 494
 495         /* checking this with ep0 is not accurate as we already
 496          * read a control request
 497          **/
 498         if (idx != 0 && fifo_count < ep->ep.maxpacket) {
 499                 is_last = 1;
 500                 /* overflowed this request?  flush extra data */
 501                 if (fifo_count != avail)
 502                         req->req.status = -EOVERFLOW;
 503         } else {
 504                 is_last = (req->req.length <= req->req.actual) ? 1 : 0;
 505         }
 506
 507         udc_write(idx, S3C2410_UDC_INDEX_REG);
 508         fifo_count = s3c2410_udc_fifo_count_out();
 509
 510         /* Only ep0 debug messages are interesting */
 511         if (idx == 0)
 512                 dprintk(DEBUG_VERBOSE, "%s fifo count : %d [last %d]\n",
 513                         __func__, fifo_count,is_last);
 514
 515         if (is_last) {
 516                 if (idx == 0) {
 517                         s3c2410_udc_set_ep0_de_out(base_addr);
 518                         ep->dev->ep0state = EP0_IDLE;
 519                 } else {
 520                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 521                         ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 522                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 523                         udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
 524                                         S3C2410_UDC_OUT_CSR1_REG);
 525                 }
 526
 527                 s3c2410_udc_done(ep, req, 0);
 528         } else {
 529                 if (idx == 0) {
 530                         s3c2410_udc_clear_ep0_opr(base_addr);
 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
 540         return is_last;
 541 }
 542
 543 static int s3c2410_udc_read_fifo_crq(struct usb_ctrlrequest *crq)
 544 {
 545         unsigned char *outbuf = (unsigned char*)crq;
 546         int bytes_read = 0;
 547
 548         udc_write(0, S3C2410_UDC_INDEX_REG);
 549
 550         bytes_read = s3c2410_udc_fifo_count_out();
 551
 552         dprintk(DEBUG_NORMAL, "%s: fifo_count=%d\n", __func__, bytes_read);
 553
 554         if (bytes_read > sizeof(struct usb_ctrlrequest))
 555                 bytes_read = sizeof(struct usb_ctrlrequest);
 556
 557         readsb(S3C2410_UDC_EP0_FIFO_REG + base_addr, outbuf, bytes_read);
 558
 559         dprintk(DEBUG_VERBOSE, "%s: len=%d %02x:%02x {%x,%x,%x}\n", __func__,
 560                 bytes_read, crq->bRequest, crq->bRequestType,
 561                 crq->wValue, crq->wIndex, crq->wLength);
 562
 563         return bytes_read;
 564 }
 565
 566 static int s3c2410_udc_get_status(struct s3c2410_udc *dev,
 567                 struct usb_ctrlrequest *crq)
 568 {
 569         u16 status = 0;
 570         u8 ep_num = crq->wIndex & 0x7F;
 571         u8 is_in = crq->wIndex & USB_DIR_IN;
 572
 573         switch (crq->bRequestType & USB_RECIP_MASK) {
 574         case USB_RECIP_INTERFACE:
 575                 break;
 576
 577         case USB_RECIP_DEVICE:
 578                 status = dev->devstatus;
 579                 break;
 580
 581         case USB_RECIP_ENDPOINT:
 582                 if (ep_num > 4 || crq->wLength > 2)
 583                         return 1;
 584
 585                 if (ep_num == 0) {
 586                         udc_write(0, S3C2410_UDC_INDEX_REG);
 587                         status = udc_read(S3C2410_UDC_IN_CSR1_REG);
 588                         status = status & S3C2410_UDC_EP0_CSR_SENDSTL;
 589                 } else {
 590                         udc_write(ep_num, S3C2410_UDC_INDEX_REG);
 591                         if (is_in) {
 592                                 status = udc_read(S3C2410_UDC_IN_CSR1_REG);
 593                                 status = status & S3C2410_UDC_ICSR1_SENDSTL;
 594                         } else {
 595                                 status = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 596                                 status = status & S3C2410_UDC_OCSR1_SENDSTL;
 597                         }
 598                 }
 599
 600                 status = status ? 1 : 0;
 601                 break;
 602
 603         default:
 604                 return 1;
 605         }
 606
 607         /* Seems to be needed to get it working. ouch :( */
 608         udelay(5);
 609         udc_write(status & 0xFF, S3C2410_UDC_EP0_FIFO_REG);
 610         udc_write(status >> 8, S3C2410_UDC_EP0_FIFO_REG);
 611         s3c2410_udc_set_ep0_de_in(base_addr);
 612
 613         return 0;
 614 }
 615 /*------------------------- usb state machine -------------------------------*/
 616 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value);
 617
 618 static void s3c2410_udc_handle_ep0_idle(struct s3c2410_udc *dev,
 619                                         struct s3c2410_ep *ep,
 620                                         struct usb_ctrlrequest *crq,
 621                                         u32 ep0csr)
 622 {
 623         int len, ret, tmp;
 624
 625         /* start control request? */
 626         if (!(ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY))
 627                 return;
 628
 629         s3c2410_udc_nuke(dev, ep, -EPROTO);
 630
 631         len = s3c2410_udc_read_fifo_crq(crq);
 632         if (len != sizeof(*crq)) {
 633                 dprintk(DEBUG_NORMAL, "setup begin: fifo READ ERROR"
 634                         " wanted %d bytes got %d. Stalling out...\n",
 635                         sizeof(*crq), len);
 636                 s3c2410_udc_set_ep0_ss(base_addr);
 637                 return;
 638         }
 639
 640         dprintk(DEBUG_NORMAL, "bRequest = %d bRequestType %d wLength = %d\n",
 641                 crq->bRequest, crq->bRequestType, crq->wLength);
 642
 643         /* cope with automagic for some standard requests. */
 644         dev->req_std = (crq->bRequestType & USB_TYPE_MASK)
 645                 == USB_TYPE_STANDARD;
 646         dev->req_config = 0;
 647         dev->req_pending = 1;
 648
 649         switch (crq->bRequest) {
 650         case USB_REQ_SET_CONFIGURATION:
 651                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_CONFIGURATION ... \n");
 652
 653                 if (crq->bRequestType == USB_RECIP_DEVICE) {
 654                         dev->req_config = 1;
 655                         s3c2410_udc_set_ep0_de_out(base_addr);
 656                 }
 657                 break;
 658
 659         case USB_REQ_SET_INTERFACE:
 660                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_INTERFACE ... \n");
 661
 662                 if (crq->bRequestType == USB_RECIP_INTERFACE) {
 663                         dev->req_config = 1;
 664                         s3c2410_udc_set_ep0_de_out(base_addr);
 665                 }
 666                 break;
 667
 668         case USB_REQ_SET_ADDRESS:
 669                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_ADDRESS ... \n");
 670
 671                 if (crq->bRequestType == USB_RECIP_DEVICE) {
 672                         tmp = crq->wValue & 0x7F;
 673                         dev->address = tmp;
 674                         udc_write((tmp | S3C2410_UDC_FUNCADDR_UPDATE),
 675                                         S3C2410_UDC_FUNC_ADDR_REG);
 676                         s3c2410_udc_set_ep0_de_out(base_addr);
 677                         return;
 678                 }
 679                 break;
 680
 681         case USB_REQ_GET_STATUS:
 682                 dprintk(DEBUG_NORMAL, "USB_REQ_GET_STATUS ... \n");
 683                 s3c2410_udc_clear_ep0_opr(base_addr);
 684
 685                 if (dev->req_std) {
 686                         if (!s3c2410_udc_get_status(dev, crq)) {
 687                                 return;
 688                         }
 689                 }
 690                 break;
 691
 692         case USB_REQ_CLEAR_FEATURE:
 693                 s3c2410_udc_clear_ep0_opr(base_addr);
 694
 695                 if (crq->bRequestType != USB_RECIP_ENDPOINT)
 696                         break;
 697
 698                 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
 699                         break;
 700
 701                 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 0);
 702                 s3c2410_udc_set_ep0_de_out(base_addr);
 703                 return;
 704
 705         case USB_REQ_SET_FEATURE:
 706                 s3c2410_udc_clear_ep0_opr(base_addr);
 707
 708                 if (crq->bRequestType != USB_RECIP_ENDPOINT)
 709                         break;
 710
 711                 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
 712                         break;
 713
 714                 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 1);
 715                 s3c2410_udc_set_ep0_de_out(base_addr);
 716                 return;
 717
 718         default:
 719                 s3c2410_udc_clear_ep0_opr(base_addr);
 720                 break;
 721         }
 722
 723         if (crq->bRequestType & USB_DIR_IN)
 724                 dev->ep0state = EP0_IN_DATA_PHASE;
 725         else
 726                 dev->ep0state = EP0_OUT_DATA_PHASE;
 727
 728         if (!dev->driver)
 729                 return;
 730
 731         /* deliver the request to the gadget driver */
 732         ret = dev->driver->setup(&dev->gadget, crq);
 733         if (ret < 0) {
 734                 if (dev->req_config) {
 735                         dprintk(DEBUG_NORMAL, "config change %02x fail %d?\n",
 736                                 crq->bRequest, ret);
 737                         return;
 738                 }
 739
 740                 if (ret == -EOPNOTSUPP)
 741                         dprintk(DEBUG_NORMAL, "Operation not supported\n");
 742                 else
 743                         dprintk(DEBUG_NORMAL,
 744                                 "dev->driver->setup failed. (%d)\n", ret);
 745
 746                 udelay(5);
 747                 s3c2410_udc_set_ep0_ss(base_addr);
 748                 s3c2410_udc_set_ep0_de_out(base_addr);
 749                 dev->ep0state = EP0_IDLE;
 750                 /* deferred i/o == no response yet */
 751         } else if (dev->req_pending) {
 752                 dprintk(DEBUG_VERBOSE, "dev->req_pending... what now?\n");
 753                 dev->req_pending=0;
 754         }
 755
 756         dprintk(DEBUG_VERBOSE, "ep0state %s\n", ep0states[dev->ep0state]);
 757 }
 758
 759 static void s3c2410_udc_handle_ep0(struct s3c2410_udc *dev)
 760 {
 761         u32                     ep0csr;
 762         struct s3c2410_ep       *ep = &dev->ep[0];
 763         struct s3c2410_request  *req;
 764         struct usb_ctrlrequest  crq;
 765
 766         if (list_empty(&ep->queue))
 767                 req = NULL;
 768         else
 769                 req = list_entry(ep->queue.next, struct s3c2410_request, queue);
 770
 771         /* We make the assumption that S3C2410_UDC_IN_CSR1_REG equal to
 772          * S3C2410_UDC_EP0_CSR_REG when index is zero */
 773
 774         udc_write(0, S3C2410_UDC_INDEX_REG);
 775         ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 776
 777         dprintk(DEBUG_NORMAL, "ep0csr %x ep0state %s\n",
 778                 ep0csr, ep0states[dev->ep0state]);
 779
 780         /* clear stall status */
 781         if (ep0csr & S3C2410_UDC_EP0_CSR_SENTSTL) {
 782                 s3c2410_udc_nuke(dev, ep, -EPIPE);
 783                 dprintk(DEBUG_NORMAL, "... clear SENT_STALL ...\n");
 784                 s3c2410_udc_clear_ep0_sst(base_addr);
 785                 dev->ep0state = EP0_IDLE;
 786                 return;
 787         }
 788
 789         /* clear setup end */
 790         if (ep0csr & S3C2410_UDC_EP0_CSR_SE) {
 791                 dprintk(DEBUG_NORMAL, "... serviced SETUP_END ...\n");
 792                 s3c2410_udc_nuke(dev, ep, 0);
 793                 s3c2410_udc_clear_ep0_se(base_addr);
 794                 dev->ep0state = EP0_IDLE;
 795         }
 796
 797         switch (dev->ep0state) {
 798         case EP0_IDLE:
 799                 s3c2410_udc_handle_ep0_idle(dev, ep, &crq, ep0csr);
 800                 break;
 801
 802         case EP0_IN_DATA_PHASE:                 /* GET_DESCRIPTOR etc */
 803                 dprintk(DEBUG_NORMAL, "EP0_IN_DATA_PHASE ... what now?\n");
 804                 if (!(ep0csr & S3C2410_UDC_EP0_CSR_IPKRDY) && req) {
 805                         s3c2410_udc_write_fifo(ep, req);
 806                 }
 807                 break;
 808
 809         case EP0_OUT_DATA_PHASE:                /* SET_DESCRIPTOR etc */
 810                 dprintk(DEBUG_NORMAL, "EP0_OUT_DATA_PHASE ... what now?\n");
 811                 if ((ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY) && req ) {
 812                         s3c2410_udc_read_fifo(ep,req);
 813                 }
 814                 break;
 815
 816         case EP0_END_XFER:
 817                 dprintk(DEBUG_NORMAL, "EP0_END_XFER ... what now?\n");
 818                 dev->ep0state = EP0_IDLE;
 819                 break;
 820
 821         case EP0_STALL:
 822                 dprintk(DEBUG_NORMAL, "EP0_STALL ... what now?\n");
 823                 dev->ep0state = EP0_IDLE;
 824                 break;
 825         }
 826 }
 827
 828 /*
 829  *      handle_ep - Manage I/O endpoints
 830  */
 831
 832 static void s3c2410_udc_handle_ep(struct s3c2410_ep *ep)
 833 {
 834         struct s3c2410_request  *req;
 835         int                     is_in = ep->bEndpointAddress & USB_DIR_IN;
 836         u32                     ep_csr1;
 837         u32                     idx;
 838
 839         if (likely (!list_empty(&ep->queue)))
 840                 req = list_entry(ep->queue.next,
 841                                 struct s3c2410_request, queue);
 842         else
 843                 req = NULL;
 844
 845         idx = ep->bEndpointAddress & 0x7F;
 846
 847         if (is_in) {
 848                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 849                 ep_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
 850                 dprintk(DEBUG_VERBOSE, "ep%01d write csr:%02x %d\n",
 851                         idx, ep_csr1, req ? 1 : 0);
 852
 853                 if (ep_csr1 & S3C2410_UDC_ICSR1_SENTSTL) {
 854                         dprintk(DEBUG_VERBOSE, "st\n");
 855                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 856                         udc_write(ep_csr1 & ~S3C2410_UDC_ICSR1_SENTSTL,
 857                                         S3C2410_UDC_IN_CSR1_REG);
 858                         return;
 859                 }
 860
 861                 if (!(ep_csr1 & S3C2410_UDC_ICSR1_PKTRDY) && req) {
 862                         s3c2410_udc_write_fifo(ep,req);
 863                 }
 864         } else {
 865                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 866                 ep_csr1 = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 867                 dprintk(DEBUG_VERBOSE, "ep%01d rd csr:%02x\n", idx, ep_csr1);
 868
 869                 if (ep_csr1 & S3C2410_UDC_OCSR1_SENTSTL) {
 870                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 871                         udc_write(ep_csr1 & ~S3C2410_UDC_OCSR1_SENTSTL,
 872                                         S3C2410_UDC_OUT_CSR1_REG);
 873                         return;
 874                 }
 875
 876                 if ((ep_csr1 & S3C2410_UDC_OCSR1_PKTRDY) && req) {
 877                         s3c2410_udc_read_fifo(ep,req);
 878                 }
 879         }
 880 }
 881
 882 #include <mach/regs-irq.h>
 883
 884 /*
 885  *      s3c2410_udc_irq - interrupt handler
 886  */
 887 static irqreturn_t s3c2410_udc_irq(int dummy, void *_dev)
 888 {
 889         struct s3c2410_udc *dev = _dev;
 890         int usb_status;
 891         int usbd_status;
 892         int pwr_reg;
 893         int ep0csr;
 894         int i;
 895         u32 idx, idx2;
 896         unsigned long flags;
 897
 898         spin_lock_irqsave(&dev->lock, flags);
 899
 900         /* Driver connected ? */
 901         if (!dev->driver) {
 902                 /* Clear interrupts */
 903                 udc_write(udc_read(S3C2410_UDC_USB_INT_REG),
 904                                 S3C2410_UDC_USB_INT_REG);
 905                 udc_write(udc_read(S3C2410_UDC_EP_INT_REG),
 906                                 S3C2410_UDC_EP_INT_REG);
 907         }
 908
 909         /* Save index */
 910         idx = udc_read(S3C2410_UDC_INDEX_REG);
 911
 912         /* Read status registers */
 913         usb_status = udc_read(S3C2410_UDC_USB_INT_REG);
 914         usbd_status = udc_read(S3C2410_UDC_EP_INT_REG);
 915         pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
 916
 917         udc_writeb(base_addr, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 918         ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 919
 920         dprintk(DEBUG_NORMAL, "usbs=%02x, usbds=%02x, pwr=%02x ep0csr=%02x\n",
 921                 usb_status, usbd_status, pwr_reg, ep0csr);
 922
 923         /*
 924          * Now, handle interrupts. There's two types :
 925          * - Reset, Resume, Suspend coming -> usb_int_reg
 926          * - EP -> ep_int_reg
 927          */
 928
 929         /* RESET */
 930         if (usb_status & S3C2410_UDC_USBINT_RESET) {
 931                 /* two kind of reset :
 932                  * - reset start -> pwr reg = 8
 933                  * - reset end   -> pwr reg = 0
 934                  **/
 935                 dprintk(DEBUG_NORMAL, "USB reset csr %x pwr %x\n",
 936                         ep0csr, pwr_reg);
 937
 938                 dev->gadget.speed = USB_SPEED_UNKNOWN;
 939                 udc_write(0x00, S3C2410_UDC_INDEX_REG);
 940                 udc_write((dev->ep[0].ep.maxpacket & 0x7ff) >> 3,
 941                                 S3C2410_UDC_MAXP_REG);
 942                 dev->address = 0;
 943
 944                 dev->ep0state = EP0_IDLE;
 945                 dev->gadget.speed = USB_SPEED_FULL;
 946
 947                 /* clear interrupt */
 948                 udc_write(S3C2410_UDC_USBINT_RESET,
 949                                 S3C2410_UDC_USB_INT_REG);
 950
 951                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 952                 spin_unlock_irqrestore(&dev->lock, flags);
 953                 return IRQ_HANDLED;
 954         }
 955
 956         /* RESUME */
 957         if (usb_status & S3C2410_UDC_USBINT_RESUME) {
 958                 dprintk(DEBUG_NORMAL, "USB resume\n");
 959
 960                 /* clear interrupt */
 961                 udc_write(S3C2410_UDC_USBINT_RESUME,
 962                                 S3C2410_UDC_USB_INT_REG);
 963
 964                 if (dev->gadget.speed != USB_SPEED_UNKNOWN
 965                                 && dev->driver
 966                                 && dev->driver->resume)
 967                         dev->driver->resume(&dev->gadget);
 968         }
 969
 970         /* SUSPEND */
 971         if (usb_status & S3C2410_UDC_USBINT_SUSPEND) {
 972                 dprintk(DEBUG_NORMAL, "USB suspend\n");
 973
 974                 /* clear interrupt */
 975                 udc_write(S3C2410_UDC_USBINT_SUSPEND,
 976                                 S3C2410_UDC_USB_INT_REG);
 977
 978                 if (dev->gadget.speed != USB_SPEED_UNKNOWN
 979                                 && dev->driver
 980                                 && dev->driver->suspend)
 981                         dev->driver->suspend(&dev->gadget);
 982
 983                 dev->ep0state = EP0_IDLE;
 984         }
 985
 986         /* EP */
 987         /* control traffic */
 988         /* check on ep0csr != 0 is not a good idea as clearing in_pkt_ready
 989          * generate an interrupt
 990          */
 991         if (usbd_status & S3C2410_UDC_INT_EP0) {
 992                 dprintk(DEBUG_VERBOSE, "USB ep0 irq\n");
 993                 /* Clear the interrupt bit by setting it to 1 */
 994                 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_REG);
 995                 s3c2410_udc_handle_ep0(dev);
 996         }
 997
 998         /* endpoint data transfers */
 999         for (i = 1; i < S3C2410_ENDPOINTS; i++) {
1000                 u32 tmp = 1 << i;
1001                 if (usbd_status & tmp) {
1002                         dprintk(DEBUG_VERBOSE, "USB ep%d irq\n", i);
1003
1004                         /* Clear the interrupt bit by setting it to 1 */
1005                         udc_write(tmp, S3C2410_UDC_EP_INT_REG);
1006                         s3c2410_udc_handle_ep(&dev->ep[i]);
1007                 }
1008         }
1009
1010         /* what else causes this interrupt? a receive! who is it? */
1011         if (!usb_status && !usbd_status && !pwr_reg && !ep0csr) {
1012                 for (i = 1; i < S3C2410_ENDPOINTS; i++) {
1013                         idx2 = udc_read(S3C2410_UDC_INDEX_REG);
1014                         udc_write(i, S3C2410_UDC_INDEX_REG);
1015
1016                         if (udc_read(S3C2410_UDC_OUT_CSR1_REG) & 0x1)
1017                                 s3c2410_udc_handle_ep(&dev->ep[i]);
1018
1019                         /* restore index */
1020                         udc_write(idx2, S3C2410_UDC_INDEX_REG);
1021                 }
1022         }
1023
1024         dprintk(DEBUG_VERBOSE, "irq: %d s3c2410_udc_done.\n", IRQ_USBD);
1025
1026         /* Restore old index */
1027         udc_write(idx, S3C2410_UDC_INDEX_REG);
1028
1029         spin_unlock_irqrestore(&dev->lock, flags);
1030
1031         return IRQ_HANDLED;
1032 }
1033 /*------------------------- s3c2410_ep_ops ----------------------------------*/
1034
1035 static inline struct s3c2410_ep *to_s3c2410_ep(struct usb_ep *ep)
1036 {
1037         return container_of(ep, struct s3c2410_ep, ep);
1038 }
1039
1040 static inline struct s3c2410_udc *to_s3c2410_udc(struct usb_gadget *gadget)
1041 {
1042         return container_of(gadget, struct s3c2410_udc, gadget);
1043 }
1044
1045 static inline struct s3c2410_request *to_s3c2410_req(struct usb_request *req)
1046 {
1047         return container_of(req, struct s3c2410_request, req);
1048 }
1049
1050 /*
1051  *      s3c2410_udc_ep_enable
1052  */
1053 static int s3c2410_udc_ep_enable(struct usb_ep *_ep,
1054                                  const struct usb_endpoint_descriptor *desc)
1055 {
1056         struct s3c2410_udc      *dev;
1057         struct s3c2410_ep       *ep;
1058         u32                     max, tmp;
1059         unsigned long           flags;
1060         u32                     csr1,csr2;
1061         u32                     int_en_reg;
1062
1063         ep = to_s3c2410_ep(_ep);
1064
1065         if (!_ep || !desc || ep->desc
1066                         || _ep->name == ep0name
1067                         || desc->bDescriptorType != USB_DT_ENDPOINT)
1068                 return -EINVAL;
1069
1070         dev = ep->dev;
1071         if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
1072                 return -ESHUTDOWN;
1073
1074         max = usb_endpoint_maxp(desc) & 0x1fff;
1075
1076         local_irq_save (flags);
1077         _ep->maxpacket = max & 0x7ff;
1078         ep->desc = desc;
1079         ep->halted = 0;
1080         ep->bEndpointAddress = desc->bEndpointAddress;
1081
1082         /* set max packet */
1083         udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1084         udc_write(max >> 3, S3C2410_UDC_MAXP_REG);
1085
1086         /* set type, direction, address; reset fifo counters */
1087         if (desc->bEndpointAddress & USB_DIR_IN) {
1088                 csr1 = S3C2410_UDC_ICSR1_FFLUSH|S3C2410_UDC_ICSR1_CLRDT;
1089                 csr2 = S3C2410_UDC_ICSR2_MODEIN|S3C2410_UDC_ICSR2_DMAIEN;
1090
1091                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1092                 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1093                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1094                 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1095         } else {
1096                 /* don't flush in fifo or it will cause endpoint interrupt */
1097                 csr1 = S3C2410_UDC_ICSR1_CLRDT;
1098                 csr2 = S3C2410_UDC_ICSR2_DMAIEN;
1099
1100                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1101                 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1102                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1103                 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1104
1105                 csr1 = S3C2410_UDC_OCSR1_FFLUSH | S3C2410_UDC_OCSR1_CLRDT;
1106                 csr2 = S3C2410_UDC_OCSR2_DMAIEN;
1107
1108                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1109                 udc_write(csr1, S3C2410_UDC_OUT_CSR1_REG);
1110                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1111                 udc_write(csr2, S3C2410_UDC_OUT_CSR2_REG);
1112         }
1113
1114         /* enable irqs */
1115         int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1116         udc_write(int_en_reg | (1 << ep->num), S3C2410_UDC_EP_INT_EN_REG);
1117
1118         /* print some debug message */
1119         tmp = desc->bEndpointAddress;
1120         dprintk (DEBUG_NORMAL, "enable %s(%d) ep%x%s-blk max %02x\n",
1121                  _ep->name,ep->num, tmp,
1122                  desc->bEndpointAddress & USB_DIR_IN ? "in" : "out", max);
1123
1124         local_irq_restore (flags);
1125         s3c2410_udc_set_halt(_ep, 0);
1126
1127         return 0;
1128 }
1129
1130 /*
1131  * s3c2410_udc_ep_disable
1132  */
1133 static int s3c2410_udc_ep_disable(struct usb_ep *_ep)
1134 {
1135         struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1136         unsigned long flags;
1137         u32 int_en_reg;
1138
1139         if (!_ep || !ep->desc) {
1140                 dprintk(DEBUG_NORMAL, "%s not enabled\n",
1141                         _ep ? ep->ep.name : NULL);
1142                 return -EINVAL;
1143         }
1144
1145         local_irq_save(flags);
1146
1147         dprintk(DEBUG_NORMAL, "ep_disable: %s\n", _ep->name);
1148
1149         ep->desc = NULL;
1150         ep->ep.desc = NULL;
1151         ep->halted = 1;
1152
1153         s3c2410_udc_nuke (ep->dev, ep, -ESHUTDOWN);
1154
1155         /* disable irqs */
1156         int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1157         udc_write(int_en_reg & ~(1<<ep->num), S3C2410_UDC_EP_INT_EN_REG);
1158
1159         local_irq_restore(flags);
1160
1161         dprintk(DEBUG_NORMAL, "%s disabled\n", _ep->name);
1162
1163         return 0;
1164 }
1165
1166 /*
1167  * s3c2410_udc_alloc_request
1168  */
1169 static struct usb_request *
1170 s3c2410_udc_alloc_request(struct usb_ep *_ep, gfp_t mem_flags)
1171 {
1172         struct s3c2410_request *req;
1173
1174         dprintk(DEBUG_VERBOSE,"%s(%p,%d)\n", __func__, _ep, mem_flags);
1175
1176         if (!_ep)
1177                 return NULL;
1178
1179         req = kzalloc (sizeof(struct s3c2410_request), mem_flags);
1180         if (!req)
1181                 return NULL;
1182
1183         INIT_LIST_HEAD (&req->queue);
1184         return &req->req;
1185 }
1186
1187 /*
1188  * s3c2410_udc_free_request
1189  */
1190 static void
1191 s3c2410_udc_free_request(struct usb_ep *_ep, struct usb_request *_req)
1192 {
1193         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1194         struct s3c2410_request  *req = to_s3c2410_req(_req);
1195
1196         dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1197
1198         if (!ep || !_req || (!ep->desc && _ep->name != ep0name))
1199                 return;
1200
1201         WARN_ON (!list_empty (&req->queue));
1202         kfree(req);
1203 }
1204
1205 /*
1206  *      s3c2410_udc_queue
1207  */
1208 static int s3c2410_udc_queue(struct usb_ep *_ep, struct usb_request *_req,
1209                 gfp_t gfp_flags)
1210 {
1211         struct s3c2410_request  *req = to_s3c2410_req(_req);
1212         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1213         struct s3c2410_udc      *dev;
1214         u32                     ep_csr = 0;
1215         int                     fifo_count = 0;
1216         unsigned long           flags;
1217
1218         if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1219                 dprintk(DEBUG_NORMAL, "%s: invalid args\n", __func__);
1220                 return -EINVAL;
1221         }
1222
1223         dev = ep->dev;
1224         if (unlikely (!dev->driver
1225                         || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
1226                 return -ESHUTDOWN;
1227         }
1228
1229         local_irq_save (flags);
1230
1231         if (unlikely(!_req || !_req->complete
1232                         || !_req->buf || !list_empty(&req->queue))) {
1233                 if (!_req)
1234                         dprintk(DEBUG_NORMAL, "%s: 1 X X X\n", __func__);
1235                 else {
1236                         dprintk(DEBUG_NORMAL, "%s: 0 %01d %01d %01d\n",
1237                                 __func__, !_req->complete,!_req->buf,
1238                                 !list_empty(&req->queue));
1239                 }
1240
1241                 local_irq_restore(flags);
1242                 return -EINVAL;
1243         }
1244
1245         _req->status = -EINPROGRESS;
1246         _req->actual = 0;
1247
1248         dprintk(DEBUG_VERBOSE, "%s: ep%x len %d\n",
1249                  __func__, ep->bEndpointAddress, _req->length);
1250
1251         if (ep->bEndpointAddress) {
1252                 udc_write(ep->bEndpointAddress & 0x7F, S3C2410_UDC_INDEX_REG);
1253
1254                 ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
1255                                 ? S3C2410_UDC_IN_CSR1_REG
1256                                 : S3C2410_UDC_OUT_CSR1_REG);
1257                 fifo_count = s3c2410_udc_fifo_count_out();
1258         } else {
1259                 udc_write(0, S3C2410_UDC_INDEX_REG);
1260                 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
1261                 fifo_count = s3c2410_udc_fifo_count_out();
1262         }
1263
1264         /* kickstart this i/o queue? */
1265         if (list_empty(&ep->queue) && !ep->halted) {
1266                 if (ep->bEndpointAddress == 0 /* ep0 */) {
1267                         switch (dev->ep0state) {
1268                         case EP0_IN_DATA_PHASE:
1269                                 if (!(ep_csr&S3C2410_UDC_EP0_CSR_IPKRDY)
1270                                                 && s3c2410_udc_write_fifo(ep,
1271                                                         req)) {
1272                                         dev->ep0state = EP0_IDLE;
1273                                         req = NULL;
1274                                 }
1275                                 break;
1276
1277                         case EP0_OUT_DATA_PHASE:
1278                                 if ((!_req->length)
1279                                         || ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1280                                                 && s3c2410_udc_read_fifo(ep,
1281                                                         req))) {
1282                                         dev->ep0state = EP0_IDLE;
1283                                         req = NULL;
1284                                 }
1285                                 break;
1286
1287                         default:
1288                                 local_irq_restore(flags);
1289                                 return -EL2HLT;
1290                         }
1291                 } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0
1292                                 && (!(ep_csr&S3C2410_UDC_OCSR1_PKTRDY))
1293                                 && s3c2410_udc_write_fifo(ep, req)) {
1294                         req = NULL;
1295                 } else if ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1296                                 && fifo_count
1297                                 && s3c2410_udc_read_fifo(ep, req)) {
1298                         req = NULL;
1299                 }
1300         }
1301
1302         /* pio or dma irq handler advances the queue. */
1303         if (likely (req != 0))
1304                 list_add_tail(&req->queue, &ep->queue);
1305
1306         local_irq_restore(flags);
1307
1308         dprintk(DEBUG_VERBOSE, "%s ok\n", __func__);
1309         return 0;
1310 }
1311
1312 /*
1313  *      s3c2410_udc_dequeue
1314  */
1315 static int s3c2410_udc_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1316 {
1317         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1318         struct s3c2410_udc      *udc;
1319         int                     retval = -EINVAL;
1320         unsigned long           flags;
1321         struct s3c2410_request  *req = NULL;
1322
1323         dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1324
1325         if (!the_controller->driver)
1326                 return -ESHUTDOWN;
1327
1328         if (!_ep || !_req)
1329                 return retval;
1330
1331         udc = to_s3c2410_udc(ep->gadget);
1332
1333         local_irq_save (flags);
1334
1335         list_for_each_entry (req, &ep->queue, queue) {
1336                 if (&req->req == _req) {
1337                         list_del_init (&req->queue);
1338                         _req->status = -ECONNRESET;
1339                         retval = 0;
1340                         break;
1341                 }
1342         }
1343
1344         if (retval == 0) {
1345                 dprintk(DEBUG_VERBOSE,
1346                         "dequeued req %p from %s, len %d buf %p\n",
1347                         req, _ep->name, _req->length, _req->buf);
1348
1349                 s3c2410_udc_done(ep, req, -ECONNRESET);
1350         }
1351
1352         local_irq_restore (flags);
1353         return retval;
1354 }
1355
1356 /*
1357  * s3c2410_udc_set_halt
1358  */
1359 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value)
1360 {
1361         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1362         u32                     ep_csr = 0;
1363         unsigned long           flags;
1364         u32                     idx;
1365
1366         if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) {
1367                 dprintk(DEBUG_NORMAL, "%s: inval 2\n", __func__);
1368                 return -EINVAL;
1369         }
1370
1371         local_irq_save (flags);
1372
1373         idx = ep->bEndpointAddress & 0x7F;
1374
1375         if (idx == 0) {
1376                 s3c2410_udc_set_ep0_ss(base_addr);
1377                 s3c2410_udc_set_ep0_de_out(base_addr);
1378         } else {
1379                 udc_write(idx, S3C2410_UDC_INDEX_REG);
1380                 ep_csr = udc_read((ep->bEndpointAddress &USB_DIR_IN)
1381                                 ? S3C2410_UDC_IN_CSR1_REG
1382                                 : S3C2410_UDC_OUT_CSR1_REG);
1383
1384                 if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
1385                         if (value)
1386                                 udc_write(ep_csr | S3C2410_UDC_ICSR1_SENDSTL,
1387                                         S3C2410_UDC_IN_CSR1_REG);
1388                         else {
1389                                 ep_csr &= ~S3C2410_UDC_ICSR1_SENDSTL;
1390                                 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1391                                 ep_csr |= S3C2410_UDC_ICSR1_CLRDT;
1392                                 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1393                         }
1394                 } else {
1395                         if (value)
1396                                 udc_write(ep_csr | S3C2410_UDC_OCSR1_SENDSTL,
1397                                         S3C2410_UDC_OUT_CSR1_REG);
1398                         else {
1399                                 ep_csr &= ~S3C2410_UDC_OCSR1_SENDSTL;
1400                                 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1401                                 ep_csr |= S3C2410_UDC_OCSR1_CLRDT;
1402                                 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1403                         }
1404                 }
1405         }
1406
1407         ep->halted = value ? 1 : 0;
1408         local_irq_restore (flags);
1409
1410         return 0;
1411 }
1412
1413 static const struct usb_ep_ops s3c2410_ep_ops = {
1414         .enable         = s3c2410_udc_ep_enable,
1415         .disable        = s3c2410_udc_ep_disable,
1416
1417         .alloc_request  = s3c2410_udc_alloc_request,
1418         .free_request   = s3c2410_udc_free_request,
1419
1420         .queue          = s3c2410_udc_queue,
1421         .dequeue        = s3c2410_udc_dequeue,
1422
1423         .set_halt       = s3c2410_udc_set_halt,
1424 };
1425
1426 /*------------------------- usb_gadget_ops ----------------------------------*/
1427
1428 /*
1429  *      s3c2410_udc_get_frame
1430  */
1431 static int s3c2410_udc_get_frame(struct usb_gadget *_gadget)
1432 {
1433         int tmp;
1434
1435         dprintk(DEBUG_VERBOSE, "%s()\n", __func__);
1436
1437         tmp = udc_read(S3C2410_UDC_FRAME_NUM2_REG) << 8;
1438         tmp |= udc_read(S3C2410_UDC_FRAME_NUM1_REG);
1439         return tmp;
1440 }
1441
1442 /*
1443  *      s3c2410_udc_wakeup
1444  */
1445 static int s3c2410_udc_wakeup(struct usb_gadget *_gadget)
1446 {
1447         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1448         return 0;
1449 }
1450
1451 /*
1452  *      s3c2410_udc_set_selfpowered
1453  */
1454 static int s3c2410_udc_set_selfpowered(struct usb_gadget *gadget, int value)
1455 {
1456         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1457
1458         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1459
1460         if (value)
1461                 udc->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
1462         else
1463                 udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
1464
1465         return 0;
1466 }
1467
1468 static void s3c2410_udc_disable(struct s3c2410_udc *dev);
1469 static void s3c2410_udc_enable(struct s3c2410_udc *dev);
1470
1471 static int s3c2410_udc_set_pullup(struct s3c2410_udc *udc, int is_on)
1472 {
1473         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1474
1475         if (udc_info && (udc_info->udc_command ||
1476                 gpio_is_valid(udc_info->pullup_pin))) {
1477
1478                 if (is_on)
1479                         s3c2410_udc_enable(udc);
1480                 else {
1481                         if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
1482                                 if (udc->driver && udc->driver->disconnect)
1483                                         udc->driver->disconnect(&udc->gadget);
1484
1485                         }
1486                         s3c2410_udc_disable(udc);
1487                 }
1488         }
1489         else
1490                 return -EOPNOTSUPP;
1491
1492         return 0;
1493 }
1494
1495 static int s3c2410_udc_vbus_session(struct usb_gadget *gadget, int is_active)
1496 {
1497         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1498
1499         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1500
1501         udc->vbus = (is_active != 0);
1502         s3c2410_udc_set_pullup(udc, is_active);
1503         return 0;
1504 }
1505
1506 static int s3c2410_udc_pullup(struct usb_gadget *gadget, int is_on)
1507 {
1508         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1509
1510         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1511
1512         s3c2410_udc_set_pullup(udc, is_on ? 0 : 1);
1513         return 0;
1514 }
1515
1516 static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev)
1517 {
1518         struct s3c2410_udc      *dev = _dev;
1519         unsigned int            value;
1520
1521         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1522
1523         value = gpio_get_value(udc_info->vbus_pin) ? 1 : 0;
1524         if (udc_info->vbus_pin_inverted)
1525                 value = !value;
1526
1527         if (value != dev->vbus)
1528                 s3c2410_udc_vbus_session(&dev->gadget, value);
1529
1530         return IRQ_HANDLED;
1531 }
1532
1533 static int s3c2410_vbus_draw(struct usb_gadget *_gadget, unsigned ma)
1534 {
1535         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1536
1537         if (udc_info && udc_info->vbus_draw) {
1538                 udc_info->vbus_draw(ma);
1539                 return 0;
1540         }
1541
1542         return -ENOTSUPP;
1543 }
1544
1545 static int s3c2410_udc_start(struct usb_gadget_driver *driver,
1546                 int (*bind)(struct usb_gadget *));
1547 static int s3c2410_udc_stop(struct usb_gadget_driver *driver);
1548
1549 static const struct usb_gadget_ops s3c2410_ops = {
1550         .get_frame              = s3c2410_udc_get_frame,
1551         .wakeup                 = s3c2410_udc_wakeup,
1552         .set_selfpowered        = s3c2410_udc_set_selfpowered,
1553         .pullup                 = s3c2410_udc_pullup,
1554         .vbus_session           = s3c2410_udc_vbus_session,
1555         .vbus_draw              = s3c2410_vbus_draw,
1556         .start                  = s3c2410_udc_start,
1557         .stop                   = s3c2410_udc_stop,
1558 };
1559
1560 static void s3c2410_udc_command(enum s3c2410_udc_cmd_e cmd)
1561 {
1562         if (!udc_info)
1563                 return;
1564
1565         if (udc_info->udc_command) {
1566                 udc_info->udc_command(cmd);
1567         } else if (gpio_is_valid(udc_info->pullup_pin)) {
1568                 int value;
1569
1570                 switch (cmd) {
1571                 case S3C2410_UDC_P_ENABLE:
1572                         value = 1;
1573                         break;
1574                 case S3C2410_UDC_P_DISABLE:
1575                         value = 0;
1576                         break;
1577                 default:
1578                         return;
1579                 }
1580                 value ^= udc_info->pullup_pin_inverted;
1581
1582                 gpio_set_value(udc_info->pullup_pin, value);
1583         }
1584 }
1585
1586 /*------------------------- gadget driver handling---------------------------*/
1587 /*
1588  * s3c2410_udc_disable
1589  */
1590 static void s3c2410_udc_disable(struct s3c2410_udc *dev)
1591 {
1592         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1593
1594         /* Disable all interrupts */
1595         udc_write(0x00, S3C2410_UDC_USB_INT_EN_REG);
1596         udc_write(0x00, S3C2410_UDC_EP_INT_EN_REG);
1597
1598         /* Clear the interrupt registers */
1599         udc_write(S3C2410_UDC_USBINT_RESET
1600                                 | S3C2410_UDC_USBINT_RESUME
1601                                 | S3C2410_UDC_USBINT_SUSPEND,
1602                         S3C2410_UDC_USB_INT_REG);
1603
1604         udc_write(0x1F, S3C2410_UDC_EP_INT_REG);
1605
1606         /* Good bye, cruel world */
1607         s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
1608
1609         /* Set speed to unknown */
1610         dev->gadget.speed = USB_SPEED_UNKNOWN;
1611 }
1612
1613 /*
1614  * s3c2410_udc_reinit
1615  */
1616 static void s3c2410_udc_reinit(struct s3c2410_udc *dev)
1617 {
1618         u32 i;
1619
1620         /* device/ep0 records init */
1621         INIT_LIST_HEAD (&dev->gadget.ep_list);
1622         INIT_LIST_HEAD (&dev->gadget.ep0->ep_list);
1623         dev->ep0state = EP0_IDLE;
1624
1625         for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1626                 struct s3c2410_ep *ep = &dev->ep[i];
1627
1628                 if (i != 0)
1629                         list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list);
1630
1631                 ep->dev = dev;
1632                 ep->desc = NULL;
1633                 ep->ep.desc = NULL;
1634                 ep->halted = 0;
1635                 INIT_LIST_HEAD (&ep->queue);
1636         }
1637 }
1638
1639 /*
1640  * s3c2410_udc_enable
1641  */
1642 static void s3c2410_udc_enable(struct s3c2410_udc *dev)
1643 {
1644         int i;
1645
1646         dprintk(DEBUG_NORMAL, "s3c2410_udc_enable called\n");
1647
1648         /* dev->gadget.speed = USB_SPEED_UNKNOWN; */
1649         dev->gadget.speed = USB_SPEED_FULL;
1650
1651         /* Set MAXP for all endpoints */
1652         for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1653                 udc_write(i, S3C2410_UDC_INDEX_REG);
1654                 udc_write((dev->ep[i].ep.maxpacket & 0x7ff) >> 3,
1655                                 S3C2410_UDC_MAXP_REG);
1656         }
1657
1658         /* Set default power state */
1659         udc_write(DEFAULT_POWER_STATE, S3C2410_UDC_PWR_REG);
1660
1661         /* Enable reset and suspend interrupt interrupts */
1662         udc_write(S3C2410_UDC_USBINT_RESET | S3C2410_UDC_USBINT_SUSPEND,
1663                         S3C2410_UDC_USB_INT_EN_REG);
1664
1665         /* Enable ep0 interrupt */
1666         udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_EN_REG);
1667
1668         /* time to say "hello, world" */
1669         s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
1670 }
1671
1672 static int s3c2410_udc_start(struct usb_gadget_driver *driver,
1673                 int (*bind)(struct usb_gadget *))
1674 {
1675         struct s3c2410_udc *udc = the_controller;
1676         int             retval;
1677
1678         dprintk(DEBUG_NORMAL, "%s() '%s'\n", __func__, driver->driver.name);
1679
1680         /* Sanity checks */
1681         if (!udc)
1682                 return -ENODEV;
1683
1684         if (udc->driver)
1685                 return -EBUSY;
1686
1687         if (!bind || !driver->setup || driver->max_speed < USB_SPEED_FULL) {
1688                 printk(KERN_ERR "Invalid driver: bind %p setup %p speed %d\n",
1689                         bind, driver->setup, driver->max_speed);
1690                 return -EINVAL;
1691         }
1692 #if defined(MODULE)
1693         if (!driver->unbind) {
1694                 printk(KERN_ERR "Invalid driver: no unbind method\n");
1695                 return -EINVAL;
1696         }
1697 #endif
1698
1699         /* Hook the driver */
1700         udc->driver = driver;
1701         udc->gadget.dev.driver = &driver->driver;
1702
1703         /* Bind the driver */
1704         if ((retval = device_add(&udc->gadget.dev)) != 0) {
1705                 printk(KERN_ERR "Error in device_add() : %d\n",retval);
1706                 goto register_error;
1707         }
1708
1709         dprintk(DEBUG_NORMAL, "binding gadget driver '%s'\n",
1710                 driver->driver.name);
1711
1712         if ((retval = bind(&udc->gadget)) != 0) {
1713                 device_del(&udc->gadget.dev);
1714                 goto register_error;
1715         }
1716
1717         /* Enable udc */
1718         s3c2410_udc_enable(udc);
1719
1720         return 0;
1721
1722 register_error:
1723         udc->driver = NULL;
1724         udc->gadget.dev.driver = NULL;
1725         return retval;
1726 }
1727
1728 static int s3c2410_udc_stop(struct usb_gadget_driver *driver)
1729 {
1730         struct s3c2410_udc *udc = the_controller;
1731
1732         if (!udc)
1733                 return -ENODEV;
1734
1735         if (!driver || driver != udc->driver || !driver->unbind)
1736                 return -EINVAL;
1737
1738         dprintk(DEBUG_NORMAL, "usb_gadget_unregister_driver() '%s'\n",
1739                 driver->driver.name);
1740
1741         /* report disconnect */
1742         if (driver->disconnect)
1743                 driver->disconnect(&udc->gadget);
1744
1745         driver->unbind(&udc->gadget);
1746
1747         device_del(&udc->gadget.dev);
1748         udc->driver = NULL;
1749
1750         /* Disable udc */
1751         s3c2410_udc_disable(udc);
1752
1753         return 0;
1754 }
1755
1756 /*---------------------------------------------------------------------------*/
1757 static struct s3c2410_udc memory = {
1758         .gadget = {
1759                 .ops            = &s3c2410_ops,
1760                 .ep0            = &memory.ep[0].ep,
1761                 .name           = gadget_name,
1762                 .dev = {
1763                         .init_name      = "gadget",
1764                 },
1765         },
1766
1767         /* control endpoint */
1768         .ep[0] = {
1769                 .num            = 0,
1770                 .ep = {
1771                         .name           = ep0name,
1772                         .ops            = &s3c2410_ep_ops,
1773                         .maxpacket      = EP0_FIFO_SIZE,
1774                 },
1775                 .dev            = &memory,
1776         },
1777
1778         /* first group of endpoints */
1779         .ep[1] = {
1780                 .num            = 1,
1781                 .ep = {
1782                         .name           = "ep1-bulk",
1783                         .ops            = &s3c2410_ep_ops,
1784                         .maxpacket      = EP_FIFO_SIZE,
1785                 },
1786                 .dev            = &memory,
1787                 .fifo_size      = EP_FIFO_SIZE,
1788                 .bEndpointAddress = 1,
1789                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1790         },
1791         .ep[2] = {
1792                 .num            = 2,
1793                 .ep = {
1794                         .name           = "ep2-bulk",
1795                         .ops            = &s3c2410_ep_ops,
1796                         .maxpacket      = EP_FIFO_SIZE,
1797                 },
1798                 .dev            = &memory,
1799                 .fifo_size      = EP_FIFO_SIZE,
1800                 .bEndpointAddress = 2,
1801                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1802         },
1803         .ep[3] = {
1804                 .num            = 3,
1805                 .ep = {
1806                         .name           = "ep3-bulk",
1807                         .ops            = &s3c2410_ep_ops,
1808                         .maxpacket      = EP_FIFO_SIZE,
1809                 },
1810                 .dev            = &memory,
1811                 .fifo_size      = EP_FIFO_SIZE,
1812                 .bEndpointAddress = 3,
1813                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1814         },
1815         .ep[4] = {
1816                 .num            = 4,
1817                 .ep = {
1818                         .name           = "ep4-bulk",
1819                         .ops            = &s3c2410_ep_ops,
1820                         .maxpacket      = EP_FIFO_SIZE,
1821                 },
1822                 .dev            = &memory,
1823                 .fifo_size      = EP_FIFO_SIZE,
1824                 .bEndpointAddress = 4,
1825                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1826         }
1827
1828 };
1829
1830 /*
1831  *      probe - binds to the platform device
1832  */
1833 static int s3c2410_udc_probe(struct platform_device *pdev)
1834 {
1835         struct s3c2410_udc *udc = &memory;
1836         struct device *dev = &pdev->dev;
1837         int retval;
1838         int irq;
1839
1840         dev_dbg(dev, "%s()\n", __func__);
1841
1842         usb_bus_clock = clk_get(NULL, "usb-bus-gadget");
1843         if (IS_ERR(usb_bus_clock)) {
1844                 dev_err(dev, "failed to get usb bus clock source\n");
1845                 return PTR_ERR(usb_bus_clock);
1846         }
1847
1848         clk_enable(usb_bus_clock);
1849
1850         udc_clock = clk_get(NULL, "usb-device");
1851         if (IS_ERR(udc_clock)) {
1852                 dev_err(dev, "failed to get udc clock source\n");
1853                 return PTR_ERR(udc_clock);
1854         }
1855
1856         clk_enable(udc_clock);
1857
1858         mdelay(10);
1859
1860         dev_dbg(dev, "got and enabled clocks\n");
1861
1862         if (strncmp(pdev->name, "s3c2440", 7) == 0) {
1863                 dev_info(dev, "S3C2440: increasing FIFO to 128 bytes\n");
1864                 memory.ep[1].fifo_size = S3C2440_EP_FIFO_SIZE;
1865                 memory.ep[2].fifo_size = S3C2440_EP_FIFO_SIZE;
1866                 memory.ep[3].fifo_size = S3C2440_EP_FIFO_SIZE;
1867                 memory.ep[4].fifo_size = S3C2440_EP_FIFO_SIZE;
1868         }
1869
1870         spin_lock_init (&udc->lock);
1871         udc_info = pdev->dev.platform_data;
1872
1873         rsrc_start = S3C2410_PA_USBDEV;
1874         rsrc_len   = S3C24XX_SZ_USBDEV;
1875
1876         if (!request_mem_region(rsrc_start, rsrc_len, gadget_name))
1877                 return -EBUSY;
1878
1879         base_addr = ioremap(rsrc_start, rsrc_len);
1880         if (!base_addr) {
1881                 retval = -ENOMEM;
1882                 goto err_mem;
1883         }
1884
1885         device_initialize(&udc->gadget.dev);
1886         udc->gadget.dev.parent = &pdev->dev;
1887         udc->gadget.dev.dma_mask = pdev->dev.dma_mask;
1888
1889         the_controller = udc;
1890         platform_set_drvdata(pdev, udc);
1891
1892         s3c2410_udc_disable(udc);
1893         s3c2410_udc_reinit(udc);
1894
1895         /* irq setup after old hardware state is cleaned up */
1896         retval = request_irq(IRQ_USBD, s3c2410_udc_irq,
1897                              0, gadget_name, udc);
1898
1899         if (retval != 0) {
1900                 dev_err(dev, "cannot get irq %i, err %d\n", IRQ_USBD, retval);
1901                 retval = -EBUSY;
1902                 goto err_map;
1903         }
1904
1905         dev_dbg(dev, "got irq %i\n", IRQ_USBD);
1906
1907         if (udc_info && udc_info->vbus_pin > 0) {
1908                 retval = gpio_request(udc_info->vbus_pin, "udc vbus");
1909                 if (retval < 0) {
1910                         dev_err(dev, "cannot claim vbus pin\n");
1911                         goto err_int;
1912                 }
1913
1914                 irq = gpio_to_irq(udc_info->vbus_pin);
1915                 if (irq < 0) {
1916                         dev_err(dev, "no irq for gpio vbus pin\n");
1917                         goto err_gpio_claim;
1918                 }
1919
1920                 retval = request_irq(irq, s3c2410_udc_vbus_irq,
1921                                      IRQF_TRIGGER_RISING
1922                                      | IRQF_TRIGGER_FALLING | IRQF_SHARED,
1923                                      gadget_name, udc);
1924
1925                 if (retval != 0) {
1926                         dev_err(dev, "can't get vbus irq %d, err %d\n",
1927                                 irq, retval);
1928                         retval = -EBUSY;
1929                         goto err_gpio_claim;
1930                 }
1931
1932                 dev_dbg(dev, "got irq %i\n", irq);
1933         } else {
1934                 udc->vbus = 1;
1935         }
1936
1937         if (udc_info && !udc_info->udc_command &&
1938                 gpio_is_valid(udc_info->pullup_pin)) {
1939
1940                 retval = gpio_request_one(udc_info->pullup_pin,
1941                                 udc_info->vbus_pin_inverted ?
1942                                 GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
1943                                 "udc pullup");
1944                 if (retval)
1945                         goto err_vbus_irq;
1946         }
1947
1948         retval = usb_add_gadget_udc(&pdev->dev, &udc->gadget);
1949         if (retval)
1950                 goto err_add_udc;
1951
1952         if (s3c2410_udc_debugfs_root) {
1953                 udc->regs_info = debugfs_create_file("registers", S_IRUGO,
1954                                 s3c2410_udc_debugfs_root,
1955                                 udc, &s3c2410_udc_debugfs_fops);
1956                 if (!udc->regs_info)
1957                         dev_warn(dev, "debugfs file creation failed\n");
1958         }
1959
1960         dev_dbg(dev, "probe ok\n");
1961
1962         return 0;
1963
1964 err_add_udc:
1965         if (udc_info && !udc_info->udc_command &&
1966                         gpio_is_valid(udc_info->pullup_pin))
1967                 gpio_free(udc_info->pullup_pin);
1968 err_vbus_irq:
1969         if (udc_info && udc_info->vbus_pin > 0)
1970                 free_irq(gpio_to_irq(udc_info->vbus_pin), udc);
1971 err_gpio_claim:
1972         if (udc_info && udc_info->vbus_pin > 0)
1973                 gpio_free(udc_info->vbus_pin);
1974 err_int:
1975         free_irq(IRQ_USBD, udc);
1976 err_map:
1977         iounmap(base_addr);
1978 err_mem:
1979         release_mem_region(rsrc_start, rsrc_len);
1980
1981         return retval;
1982 }
1983
1984 /*
1985  *      s3c2410_udc_remove
1986  */
1987 static int s3c2410_udc_remove(struct platform_device *pdev)
1988 {
1989         struct s3c2410_udc *udc = platform_get_drvdata(pdev);
1990         unsigned int irq;
1991
1992         dev_dbg(&pdev->dev, "%s()\n", __func__);
1993
1994         usb_del_gadget_udc(&udc->gadget);
1995         if (udc->driver)
1996                 return -EBUSY;
1997
1998         debugfs_remove(udc->regs_info);
1999
2000         if (udc_info && !udc_info->udc_command &&
2001                 gpio_is_valid(udc_info->pullup_pin))
2002                 gpio_free(udc_info->pullup_pin);
2003
2004         if (udc_info && udc_info->vbus_pin > 0) {
2005                 irq = gpio_to_irq(udc_info->vbus_pin);
2006                 free_irq(irq, udc);
2007         }
2008
2009         free_irq(IRQ_USBD, udc);
2010
2011         iounmap(base_addr);
2012         release_mem_region(rsrc_start, rsrc_len);
2013
2014         platform_set_drvdata(pdev, NULL);
2015
2016         if (!IS_ERR(udc_clock) && udc_clock != NULL) {
2017                 clk_disable(udc_clock);
2018                 clk_put(udc_clock);
2019                 udc_clock = NULL;
2020         }
2021
2022         if (!IS_ERR(usb_bus_clock) && usb_bus_clock != NULL) {
2023                 clk_disable(usb_bus_clock);
2024                 clk_put(usb_bus_clock);
2025                 usb_bus_clock = NULL;
2026         }
2027
2028         dev_dbg(&pdev->dev, "%s: remove ok\n", __func__);
2029         return 0;
2030 }
2031
2032 #ifdef CONFIG_PM
2033 static int s3c2410_udc_suspend(struct platform_device *pdev, pm_message_t message)
2034 {
2035         s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
2036
2037         return 0;
2038 }
2039
2040 static int s3c2410_udc_resume(struct platform_device *pdev)
2041 {
2042         s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
2043
2044         return 0;
2045 }
2046 #else
2047 #define s3c2410_udc_suspend     NULL
2048 #define s3c2410_udc_resume      NULL
2049 #endif
2050
2051 static const struct platform_device_id s3c_udc_ids[] = {
2052         { "s3c2410-usbgadget", },
2053         { "s3c2440-usbgadget", },
2054         { }
2055 };
2056 MODULE_DEVICE_TABLE(platform, s3c_udc_ids);
2057
2058 static struct platform_driver udc_driver_24x0 = {
2059         .driver         = {
2060                 .name   = "s3c24x0-usbgadget",
2061                 .owner  = THIS_MODULE,
2062         },
2063         .probe          = s3c2410_udc_probe,
2064         .remove         = s3c2410_udc_remove,
2065         .suspend        = s3c2410_udc_suspend,
2066         .resume         = s3c2410_udc_resume,
2067         .id_table       = s3c_udc_ids,
2068 };
2069
2070 static int __init udc_init(void)
2071 {
2072         int retval;
2073
2074         dprintk(DEBUG_NORMAL, "%s: version %s\n", gadget_name, DRIVER_VERSION);
2075
2076         s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name, NULL);
2077         if (IS_ERR(s3c2410_udc_debugfs_root)) {
2078                 printk(KERN_ERR "%s: debugfs dir creation failed %ld\n",
2079                         gadget_name, PTR_ERR(s3c2410_udc_debugfs_root));
2080                 s3c2410_udc_debugfs_root = NULL;
2081         }
2082
2083         retval = platform_driver_register(&udc_driver_24x0);
2084         if (retval)
2085                 goto err;
2086
2087         return 0;
2088
2089 err:
2090         debugfs_remove(s3c2410_udc_debugfs_root);
2091         return retval;
2092 }
2093
2094 static void __exit udc_exit(void)
2095 {
2096         platform_driver_unregister(&udc_driver_24x0);
2097         debugfs_remove(s3c2410_udc_debugfs_root);
2098 }
2099
2100 module_init(udc_init);
2101 module_exit(udc_exit);
2102
2103 MODULE_AUTHOR(DRIVER_AUTHOR);
2104 MODULE_DESCRIPTION(DRIVER_DESC);
2105 MODULE_VERSION(DRIVER_VERSION);
2106 MODULE_LICENSE("GPL");