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 #define pr_fmt(fmt) "s3c2410_udc: " fmt
  16
  17 #include <linux/module.h>
  18 #include <linux/kernel.h>
  19 #include <linux/delay.h>
  20 #include <linux/ioport.h>
  21 #include <linux/sched.h>
  22 #include <linux/slab.h>
  23 #include <linux/errno.h>
  24 #include <linux/init.h>
  25 #include <linux/timer.h>
  26 #include <linux/list.h>
  27 #include <linux/interrupt.h>
  28 #include <linux/platform_device.h>
  29 #include <linux/clk.h>
  30 #include <linux/gpio.h>
  31 #include <linux/prefetch.h>
  32 #include <linux/io.h>
  33
  34 #include <linux/debugfs.h>
  35 #include <linux/seq_file.h>
  36
  37 #include <linux/usb.h>
  38 #include <linux/usb/gadget.h>
  39
  40 #include <asm/byteorder.h>
  41 #include <asm/irq.h>
  42 #include <asm/unaligned.h>
  43 #include <mach/irqs.h>
  44
  45 #include <mach/hardware.h>
  46
  47 #include <plat/regs-udc.h>
  48 #include <linux/platform_data/usb-s3c2410_udc.h>
  49
  50
  51 #include "s3c2410_udc.h"
  52
  53 #define DRIVER_DESC     "S3C2410 USB Device Controller Gadget"
  54 #define DRIVER_VERSION  "29 Apr 2007"
  55 #define DRIVER_AUTHOR   "Herbert Pötzl <herbert@13thfloor.at>, " \
  56                         "Arnaud Patard <arnaud.patard@rtp-net.org>"
  57
  58 static const char               gadget_name[] = "s3c2410_udc";
  59 static const char               driver_desc[] = DRIVER_DESC;
  60
  61 static struct s3c2410_udc       *the_controller;
  62 static struct clk               *udc_clock;
  63 static struct clk               *usb_bus_clock;
  64 static void __iomem             *base_addr;
  65 static u64                      rsrc_start;
  66 static u64                      rsrc_len;
  67 static struct dentry            *s3c2410_udc_debugfs_root;
  68
  69 static inline u32 udc_read(u32 reg)
  70 {
  71         return readb(base_addr + reg);
  72 }
  73
  74 static inline void udc_write(u32 value, u32 reg)
  75 {
  76         writeb(value, base_addr + reg);
  77 }
  78
  79 static inline void udc_writeb(void __iomem *base, u32 value, u32 reg)
  80 {
  81         writeb(value, base + reg);
  82 }
  83
  84 static struct s3c2410_udc_mach_info *udc_info;
  85
  86 /*************************** DEBUG FUNCTION ***************************/
  87 #define DEBUG_NORMAL    1
  88 #define DEBUG_VERBOSE   2
  89
  90 #ifdef CONFIG_USB_S3C2410_DEBUG
  91 #define USB_S3C2410_DEBUG_LEVEL 0
  92
  93 static uint32_t s3c2410_ticks = 0;
  94
  95 static int dprintk(int level, const char *fmt, ...)
  96 {
  97         static char printk_buf[1024];
  98         static long prevticks;
  99         static int invocation;
 100         va_list args;
 101         int len;
 102
 103         if (level > USB_S3C2410_DEBUG_LEVEL)
 104                 return 0;
 105
 106         if (s3c2410_ticks != prevticks) {
 107                 prevticks = s3c2410_ticks;
 108                 invocation = 0;
 109         }
 110
 111         len = scnprintf(printk_buf,
 112                         sizeof(printk_buf), "%1lu.%02d USB: ",
 113                         prevticks, invocation++);
 114
 115         va_start(args, fmt);
 116         len = vscnprintf(printk_buf+len,
 117                         sizeof(printk_buf)-len, fmt, args);
 118         va_end(args);
 119
 120         return pr_debug("%s", printk_buf);
 121 }
 122 #else
 123 static int dprintk(int level, const char *fmt, ...)
 124 {
 125         return 0;
 126 }
 127 #endif
 128 static int s3c2410_udc_debugfs_seq_show(struct seq_file *m, void *p)
 129 {
 130         u32 addr_reg, pwr_reg, ep_int_reg, usb_int_reg;
 131         u32 ep_int_en_reg, usb_int_en_reg, ep0_csr;
 132         u32 ep1_i_csr1, ep1_i_csr2, ep1_o_csr1, ep1_o_csr2;
 133         u32 ep2_i_csr1, ep2_i_csr2, ep2_o_csr1, ep2_o_csr2;
 134
 135         addr_reg       = udc_read(S3C2410_UDC_FUNC_ADDR_REG);
 136         pwr_reg        = udc_read(S3C2410_UDC_PWR_REG);
 137         ep_int_reg     = udc_read(S3C2410_UDC_EP_INT_REG);
 138         usb_int_reg    = udc_read(S3C2410_UDC_USB_INT_REG);
 139         ep_int_en_reg  = udc_read(S3C2410_UDC_EP_INT_EN_REG);
 140         usb_int_en_reg = udc_read(S3C2410_UDC_USB_INT_EN_REG);
 141         udc_write(0, S3C2410_UDC_INDEX_REG);
 142         ep0_csr        = udc_read(S3C2410_UDC_IN_CSR1_REG);
 143         udc_write(1, S3C2410_UDC_INDEX_REG);
 144         ep1_i_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 145         ep1_i_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 146         ep1_o_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 147         ep1_o_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 148         udc_write(2, S3C2410_UDC_INDEX_REG);
 149         ep2_i_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 150         ep2_i_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 151         ep2_o_csr1     = udc_read(S3C2410_UDC_IN_CSR1_REG);
 152         ep2_o_csr2     = udc_read(S3C2410_UDC_IN_CSR2_REG);
 153
 154         seq_printf(m, "FUNC_ADDR_REG  : 0x%04X\n"
 155                  "PWR_REG        : 0x%04X\n"
 156                  "EP_INT_REG     : 0x%04X\n"
 157                  "USB_INT_REG    : 0x%04X\n"
 158                  "EP_INT_EN_REG  : 0x%04X\n"
 159                  "USB_INT_EN_REG : 0x%04X\n"
 160                  "EP0_CSR        : 0x%04X\n"
 161                  "EP1_I_CSR1     : 0x%04X\n"
 162                  "EP1_I_CSR2     : 0x%04X\n"
 163                  "EP1_O_CSR1     : 0x%04X\n"
 164                  "EP1_O_CSR2     : 0x%04X\n"
 165                  "EP2_I_CSR1     : 0x%04X\n"
 166                  "EP2_I_CSR2     : 0x%04X\n"
 167                  "EP2_O_CSR1     : 0x%04X\n"
 168                  "EP2_O_CSR2     : 0x%04X\n",
 169                         addr_reg, pwr_reg, ep_int_reg, usb_int_reg,
 170                         ep_int_en_reg, usb_int_en_reg, ep0_csr,
 171                         ep1_i_csr1, ep1_i_csr2, ep1_o_csr1, ep1_o_csr2,
 172                         ep2_i_csr1, ep2_i_csr2, ep2_o_csr1, ep2_o_csr2
 173                 );
 174
 175         return 0;
 176 }
 177
 178 static int s3c2410_udc_debugfs_fops_open(struct inode *inode,
 179                                          struct file *file)
 180 {
 181         return single_open(file, s3c2410_udc_debugfs_seq_show, NULL);
 182 }
 183
 184 static const struct file_operations s3c2410_udc_debugfs_fops = {
 185         .open           = s3c2410_udc_debugfs_fops_open,
 186         .read           = seq_read,
 187         .llseek         = seq_lseek,
 188         .release        = single_release,
 189         .owner          = THIS_MODULE,
 190 };
 191
 192 /* io macros */
 193
 194 static inline void s3c2410_udc_clear_ep0_opr(void __iomem *base)
 195 {
 196         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 197         udc_writeb(base, S3C2410_UDC_EP0_CSR_SOPKTRDY,
 198                         S3C2410_UDC_EP0_CSR_REG);
 199 }
 200
 201 static inline void s3c2410_udc_clear_ep0_sst(void __iomem *base)
 202 {
 203         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 204         writeb(0x00, base + S3C2410_UDC_EP0_CSR_REG);
 205 }
 206
 207 static inline void s3c2410_udc_clear_ep0_se(void __iomem *base)
 208 {
 209         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 210         udc_writeb(base, S3C2410_UDC_EP0_CSR_SSE, S3C2410_UDC_EP0_CSR_REG);
 211 }
 212
 213 static inline void s3c2410_udc_set_ep0_ipr(void __iomem *base)
 214 {
 215         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 216         udc_writeb(base, S3C2410_UDC_EP0_CSR_IPKRDY, S3C2410_UDC_EP0_CSR_REG);
 217 }
 218
 219 static inline void s3c2410_udc_set_ep0_de(void __iomem *base)
 220 {
 221         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 222         udc_writeb(base, S3C2410_UDC_EP0_CSR_DE, S3C2410_UDC_EP0_CSR_REG);
 223 }
 224
 225 inline void s3c2410_udc_set_ep0_ss(void __iomem *b)
 226 {
 227         udc_writeb(b, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 228         udc_writeb(b, S3C2410_UDC_EP0_CSR_SENDSTL, S3C2410_UDC_EP0_CSR_REG);
 229 }
 230
 231 static inline void s3c2410_udc_set_ep0_de_out(void __iomem *base)
 232 {
 233         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 234
 235         udc_writeb(base, (S3C2410_UDC_EP0_CSR_SOPKTRDY
 236                                 | S3C2410_UDC_EP0_CSR_DE),
 237                         S3C2410_UDC_EP0_CSR_REG);
 238 }
 239
 240 static inline void s3c2410_udc_set_ep0_sse_out(void __iomem *base)
 241 {
 242         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 243         udc_writeb(base, (S3C2410_UDC_EP0_CSR_SOPKTRDY
 244                                 | S3C2410_UDC_EP0_CSR_SSE),
 245                         S3C2410_UDC_EP0_CSR_REG);
 246 }
 247
 248 static inline void s3c2410_udc_set_ep0_de_in(void __iomem *base)
 249 {
 250         udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 251         udc_writeb(base, (S3C2410_UDC_EP0_CSR_IPKRDY
 252                         | S3C2410_UDC_EP0_CSR_DE),
 253                 S3C2410_UDC_EP0_CSR_REG);
 254 }
 255
 256 /*------------------------- I/O ----------------------------------*/
 257
 258 /*
 259  *      s3c2410_udc_done
 260  */
 261 static void s3c2410_udc_done(struct s3c2410_ep *ep,
 262                 struct s3c2410_request *req, int status)
 263 {
 264         unsigned halted = ep->halted;
 265
 266         list_del_init(&req->queue);
 267
 268         if (likely(req->req.status == -EINPROGRESS))
 269                 req->req.status = status;
 270         else
 271                 status = req->req.status;
 272
 273         ep->halted = 1;
 274         req->req.complete(&ep->ep, &req->req);
 275         ep->halted = halted;
 276 }
 277
 278 static void s3c2410_udc_nuke(struct s3c2410_udc *udc,
 279                 struct s3c2410_ep *ep, int status)
 280 {
 281         /* Sanity check */
 282         if (&ep->queue == NULL)
 283                 return;
 284
 285         while (!list_empty(&ep->queue)) {
 286                 struct s3c2410_request *req;
 287                 req = list_entry(ep->queue.next, struct s3c2410_request,
 288                                 queue);
 289                 s3c2410_udc_done(ep, req, status);
 290         }
 291 }
 292
 293 static inline void s3c2410_udc_clear_ep_state(struct s3c2410_udc *dev)
 294 {
 295         unsigned i;
 296
 297         /* hardware SET_{CONFIGURATION,INTERFACE} automagic resets endpoint
 298          * fifos, and pending transactions mustn't be continued in any case.
 299          */
 300
 301         for (i = 1; i < S3C2410_ENDPOINTS; i++)
 302                 s3c2410_udc_nuke(dev, &dev->ep[i], -ECONNABORTED);
 303 }
 304
 305 static inline int s3c2410_udc_fifo_count_out(void)
 306 {
 307         int tmp;
 308
 309         tmp = udc_read(S3C2410_UDC_OUT_FIFO_CNT2_REG) << 8;
 310         tmp |= udc_read(S3C2410_UDC_OUT_FIFO_CNT1_REG);
 311         return tmp;
 312 }
 313
 314 /*
 315  *      s3c2410_udc_write_packet
 316  */
 317 static inline int s3c2410_udc_write_packet(int fifo,
 318                 struct s3c2410_request *req,
 319                 unsigned max)
 320 {
 321         unsigned len = min(req->req.length - req->req.actual, max);
 322         u8 *buf = req->req.buf + req->req.actual;
 323
 324         prefetch(buf);
 325
 326         dprintk(DEBUG_VERBOSE, "%s %d %d %d %d\n", __func__,
 327                 req->req.actual, req->req.length, len, req->req.actual + len);
 328
 329         req->req.actual += len;
 330
 331         udelay(5);
 332         writesb(base_addr + fifo, buf, len);
 333         return len;
 334 }
 335
 336 /*
 337  *      s3c2410_udc_write_fifo
 338  *
 339  * return:  0 = still running, 1 = completed, negative = errno
 340  */
 341 static int s3c2410_udc_write_fifo(struct s3c2410_ep *ep,
 342                 struct s3c2410_request *req)
 343 {
 344         unsigned        count;
 345         int             is_last;
 346         u32             idx;
 347         int             fifo_reg;
 348         u32             ep_csr;
 349
 350         idx = ep->bEndpointAddress & 0x7F;
 351         switch (idx) {
 352         default:
 353                 idx = 0;
 354         case 0:
 355                 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
 356                 break;
 357         case 1:
 358                 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
 359                 break;
 360         case 2:
 361                 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
 362                 break;
 363         case 3:
 364                 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
 365                 break;
 366         case 4:
 367                 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
 368                 break;
 369         }
 370
 371         count = s3c2410_udc_write_packet(fifo_reg, req, ep->ep.maxpacket);
 372
 373         /* last packet is often short (sometimes a zlp) */
 374         if (count != ep->ep.maxpacket)
 375                 is_last = 1;
 376         else if (req->req.length != req->req.actual || req->req.zero)
 377                 is_last = 0;
 378         else
 379                 is_last = 2;
 380
 381         /* Only ep0 debug messages are interesting */
 382         if (idx == 0)
 383                 dprintk(DEBUG_NORMAL,
 384                         "Written ep%d %d.%d of %d b [last %d,z %d]\n",
 385                         idx, count, req->req.actual, req->req.length,
 386                         is_last, req->req.zero);
 387
 388         if (is_last) {
 389                 /* The order is important. It prevents sending 2 packets
 390                  * at the same time */
 391
 392                 if (idx == 0) {
 393                         /* Reset signal => no need to say 'data sent' */
 394                         if (!(udc_read(S3C2410_UDC_USB_INT_REG)
 395                                         & S3C2410_UDC_USBINT_RESET))
 396                                 s3c2410_udc_set_ep0_de_in(base_addr);
 397                         ep->dev->ep0state = EP0_IDLE;
 398                 } else {
 399                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 400                         ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 401                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 402                         udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
 403                                         S3C2410_UDC_IN_CSR1_REG);
 404                 }
 405
 406                 s3c2410_udc_done(ep, req, 0);
 407                 is_last = 1;
 408         } else {
 409                 if (idx == 0) {
 410                         /* Reset signal => no need to say 'data sent' */
 411                         if (!(udc_read(S3C2410_UDC_USB_INT_REG)
 412                                         & S3C2410_UDC_USBINT_RESET))
 413                                 s3c2410_udc_set_ep0_ipr(base_addr);
 414                 } else {
 415                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 416                         ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 417                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 418                         udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
 419                                         S3C2410_UDC_IN_CSR1_REG);
 420                 }
 421         }
 422
 423         return is_last;
 424 }
 425
 426 static inline int s3c2410_udc_read_packet(int fifo, u8 *buf,
 427                 struct s3c2410_request *req, unsigned avail)
 428 {
 429         unsigned len;
 430
 431         len = min(req->req.length - req->req.actual, avail);
 432         req->req.actual += len;
 433
 434         readsb(fifo + base_addr, buf, len);
 435         return len;
 436 }
 437
 438 /*
 439  * return:  0 = still running, 1 = queue empty, negative = errno
 440  */
 441 static int s3c2410_udc_read_fifo(struct s3c2410_ep *ep,
 442                                  struct s3c2410_request *req)
 443 {
 444         u8              *buf;
 445         u32             ep_csr;
 446         unsigned        bufferspace;
 447         int             is_last = 1;
 448         unsigned        avail;
 449         int             fifo_count = 0;
 450         u32             idx;
 451         int             fifo_reg;
 452
 453         idx = ep->bEndpointAddress & 0x7F;
 454
 455         switch (idx) {
 456         default:
 457                 idx = 0;
 458         case 0:
 459                 fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
 460                 break;
 461         case 1:
 462                 fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
 463                 break;
 464         case 2:
 465                 fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
 466                 break;
 467         case 3:
 468                 fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
 469                 break;
 470         case 4:
 471                 fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
 472                 break;
 473         }
 474
 475         if (!req->req.length)
 476                 return 1;
 477
 478         buf = req->req.buf + req->req.actual;
 479         bufferspace = req->req.length - req->req.actual;
 480         if (!bufferspace) {
 481                 dprintk(DEBUG_NORMAL, "%s: buffer full!\n", __func__);
 482                 return -1;
 483         }
 484
 485         udc_write(idx, S3C2410_UDC_INDEX_REG);
 486
 487         fifo_count = s3c2410_udc_fifo_count_out();
 488         dprintk(DEBUG_NORMAL, "%s fifo count : %d\n", __func__, fifo_count);
 489
 490         if (fifo_count > ep->ep.maxpacket)
 491                 avail = ep->ep.maxpacket;
 492         else
 493                 avail = fifo_count;
 494
 495         fifo_count = s3c2410_udc_read_packet(fifo_reg, buf, req, avail);
 496
 497         /* checking this with ep0 is not accurate as we already
 498          * read a control request
 499          **/
 500         if (idx != 0 && fifo_count < ep->ep.maxpacket) {
 501                 is_last = 1;
 502                 /* overflowed this request?  flush extra data */
 503                 if (fifo_count != avail)
 504                         req->req.status = -EOVERFLOW;
 505         } else {
 506                 is_last = (req->req.length <= req->req.actual) ? 1 : 0;
 507         }
 508
 509         udc_write(idx, S3C2410_UDC_INDEX_REG);
 510         fifo_count = s3c2410_udc_fifo_count_out();
 511
 512         /* Only ep0 debug messages are interesting */
 513         if (idx == 0)
 514                 dprintk(DEBUG_VERBOSE, "%s fifo count : %d [last %d]\n",
 515                         __func__, fifo_count, is_last);
 516
 517         if (is_last) {
 518                 if (idx == 0) {
 519                         s3c2410_udc_set_ep0_de_out(base_addr);
 520                         ep->dev->ep0state = EP0_IDLE;
 521                 } else {
 522                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 523                         ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 524                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 525                         udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
 526                                         S3C2410_UDC_OUT_CSR1_REG);
 527                 }
 528
 529                 s3c2410_udc_done(ep, req, 0);
 530         } else {
 531                 if (idx == 0) {
 532                         s3c2410_udc_clear_ep0_opr(base_addr);
 533                 } else {
 534                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 535                         ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 536                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 537                         udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
 538                                         S3C2410_UDC_OUT_CSR1_REG);
 539                 }
 540         }
 541
 542         return is_last;
 543 }
 544
 545 static int s3c2410_udc_read_fifo_crq(struct usb_ctrlrequest *crq)
 546 {
 547         unsigned char *outbuf = (unsigned char *)crq;
 548         int bytes_read = 0;
 549
 550         udc_write(0, S3C2410_UDC_INDEX_REG);
 551
 552         bytes_read = s3c2410_udc_fifo_count_out();
 553
 554         dprintk(DEBUG_NORMAL, "%s: fifo_count=%d\n", __func__, bytes_read);
 555
 556         if (bytes_read > sizeof(struct usb_ctrlrequest))
 557                 bytes_read = sizeof(struct usb_ctrlrequest);
 558
 559         readsb(S3C2410_UDC_EP0_FIFO_REG + base_addr, outbuf, bytes_read);
 560
 561         dprintk(DEBUG_VERBOSE, "%s: len=%d %02x:%02x {%x,%x,%x}\n", __func__,
 562                 bytes_read, crq->bRequest, crq->bRequestType,
 563                 crq->wValue, crq->wIndex, crq->wLength);
 564
 565         return bytes_read;
 566 }
 567
 568 static int s3c2410_udc_get_status(struct s3c2410_udc *dev,
 569                 struct usb_ctrlrequest *crq)
 570 {
 571         u16 status = 0;
 572         u8 ep_num = crq->wIndex & 0x7F;
 573         u8 is_in = crq->wIndex & USB_DIR_IN;
 574
 575         switch (crq->bRequestType & USB_RECIP_MASK) {
 576         case USB_RECIP_INTERFACE:
 577                 break;
 578
 579         case USB_RECIP_DEVICE:
 580                 status = dev->devstatus;
 581                 break;
 582
 583         case USB_RECIP_ENDPOINT:
 584                 if (ep_num > 4 || crq->wLength > 2)
 585                         return 1;
 586
 587                 if (ep_num == 0) {
 588                         udc_write(0, S3C2410_UDC_INDEX_REG);
 589                         status = udc_read(S3C2410_UDC_IN_CSR1_REG);
 590                         status = status & S3C2410_UDC_EP0_CSR_SENDSTL;
 591                 } else {
 592                         udc_write(ep_num, S3C2410_UDC_INDEX_REG);
 593                         if (is_in) {
 594                                 status = udc_read(S3C2410_UDC_IN_CSR1_REG);
 595                                 status = status & S3C2410_UDC_ICSR1_SENDSTL;
 596                         } else {
 597                                 status = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 598                                 status = status & S3C2410_UDC_OCSR1_SENDSTL;
 599                         }
 600                 }
 601
 602                 status = status ? 1 : 0;
 603                 break;
 604
 605         default:
 606                 return 1;
 607         }
 608
 609         /* Seems to be needed to get it working. ouch :( */
 610         udelay(5);
 611         udc_write(status & 0xFF, S3C2410_UDC_EP0_FIFO_REG);
 612         udc_write(status >> 8, S3C2410_UDC_EP0_FIFO_REG);
 613         s3c2410_udc_set_ep0_de_in(base_addr);
 614
 615         return 0;
 616 }
 617 /*------------------------- usb state machine -------------------------------*/
 618 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value);
 619
 620 static void s3c2410_udc_handle_ep0_idle(struct s3c2410_udc *dev,
 621                                         struct s3c2410_ep *ep,
 622                                         struct usb_ctrlrequest *crq,
 623                                         u32 ep0csr)
 624 {
 625         int len, ret, tmp;
 626
 627         /* start control request? */
 628         if (!(ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY))
 629                 return;
 630
 631         s3c2410_udc_nuke(dev, ep, -EPROTO);
 632
 633         len = s3c2410_udc_read_fifo_crq(crq);
 634         if (len != sizeof(*crq)) {
 635                 dprintk(DEBUG_NORMAL, "setup begin: fifo READ ERROR"
 636                         " wanted %d bytes got %d. Stalling out...\n",
 637                         sizeof(*crq), len);
 638                 s3c2410_udc_set_ep0_ss(base_addr);
 639                 return;
 640         }
 641
 642         dprintk(DEBUG_NORMAL, "bRequest = %d bRequestType %d wLength = %d\n",
 643                 crq->bRequest, crq->bRequestType, crq->wLength);
 644
 645         /* cope with automagic for some standard requests. */
 646         dev->req_std = (crq->bRequestType & USB_TYPE_MASK)
 647                 == USB_TYPE_STANDARD;
 648         dev->req_config = 0;
 649         dev->req_pending = 1;
 650
 651         switch (crq->bRequest) {
 652         case USB_REQ_SET_CONFIGURATION:
 653                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_CONFIGURATION ...\n");
 654
 655                 if (crq->bRequestType == USB_RECIP_DEVICE) {
 656                         dev->req_config = 1;
 657                         s3c2410_udc_set_ep0_de_out(base_addr);
 658                 }
 659                 break;
 660
 661         case USB_REQ_SET_INTERFACE:
 662                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_INTERFACE ...\n");
 663
 664                 if (crq->bRequestType == USB_RECIP_INTERFACE) {
 665                         dev->req_config = 1;
 666                         s3c2410_udc_set_ep0_de_out(base_addr);
 667                 }
 668                 break;
 669
 670         case USB_REQ_SET_ADDRESS:
 671                 dprintk(DEBUG_NORMAL, "USB_REQ_SET_ADDRESS ...\n");
 672
 673                 if (crq->bRequestType == USB_RECIP_DEVICE) {
 674                         tmp = crq->wValue & 0x7F;
 675                         dev->address = tmp;
 676                         udc_write((tmp | S3C2410_UDC_FUNCADDR_UPDATE),
 677                                         S3C2410_UDC_FUNC_ADDR_REG);
 678                         s3c2410_udc_set_ep0_de_out(base_addr);
 679                         return;
 680                 }
 681                 break;
 682
 683         case USB_REQ_GET_STATUS:
 684                 dprintk(DEBUG_NORMAL, "USB_REQ_GET_STATUS ...\n");
 685                 s3c2410_udc_clear_ep0_opr(base_addr);
 686
 687                 if (dev->req_std) {
 688                         if (!s3c2410_udc_get_status(dev, crq))
 689                                 return;
 690                 }
 691                 break;
 692
 693         case USB_REQ_CLEAR_FEATURE:
 694                 s3c2410_udc_clear_ep0_opr(base_addr);
 695
 696                 if (crq->bRequestType != USB_RECIP_ENDPOINT)
 697                         break;
 698
 699                 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
 700                         break;
 701
 702                 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 0);
 703                 s3c2410_udc_set_ep0_de_out(base_addr);
 704                 return;
 705
 706         case USB_REQ_SET_FEATURE:
 707                 s3c2410_udc_clear_ep0_opr(base_addr);
 708
 709                 if (crq->bRequestType != USB_RECIP_ENDPOINT)
 710                         break;
 711
 712                 if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
 713                         break;
 714
 715                 s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 1);
 716                 s3c2410_udc_set_ep0_de_out(base_addr);
 717                 return;
 718
 719         default:
 720                 s3c2410_udc_clear_ep0_opr(base_addr);
 721                 break;
 722         }
 723
 724         if (crq->bRequestType & USB_DIR_IN)
 725                 dev->ep0state = EP0_IN_DATA_PHASE;
 726         else
 727                 dev->ep0state = EP0_OUT_DATA_PHASE;
 728
 729         if (!dev->driver)
 730                 return;
 731
 732         /* deliver the request to the gadget driver */
 733         ret = dev->driver->setup(&dev->gadget, crq);
 734         if (ret < 0) {
 735                 if (dev->req_config) {
 736                         dprintk(DEBUG_NORMAL, "config change %02x fail %d?\n",
 737                                 crq->bRequest, ret);
 738                         return;
 739                 }
 740
 741                 if (ret == -EOPNOTSUPP)
 742                         dprintk(DEBUG_NORMAL, "Operation not supported\n");
 743                 else
 744                         dprintk(DEBUG_NORMAL,
 745                                 "dev->driver->setup failed. (%d)\n", ret);
 746
 747                 udelay(5);
 748                 s3c2410_udc_set_ep0_ss(base_addr);
 749                 s3c2410_udc_set_ep0_de_out(base_addr);
 750                 dev->ep0state = EP0_IDLE;
 751                 /* deferred i/o == no response yet */
 752         } else if (dev->req_pending) {
 753                 dprintk(DEBUG_VERBOSE, "dev->req_pending... what now?\n");
 754                 dev->req_pending = 0;
 755         }
 756
 757         dprintk(DEBUG_VERBOSE, "ep0state %s\n", ep0states[dev->ep0state]);
 758 }
 759
 760 static void s3c2410_udc_handle_ep0(struct s3c2410_udc *dev)
 761 {
 762         u32                     ep0csr;
 763         struct s3c2410_ep       *ep = &dev->ep[0];
 764         struct s3c2410_request  *req;
 765         struct usb_ctrlrequest  crq;
 766
 767         if (list_empty(&ep->queue))
 768                 req = NULL;
 769         else
 770                 req = list_entry(ep->queue.next, struct s3c2410_request, queue);
 771
 772         /* We make the assumption that S3C2410_UDC_IN_CSR1_REG equal to
 773          * S3C2410_UDC_EP0_CSR_REG when index is zero */
 774
 775         udc_write(0, S3C2410_UDC_INDEX_REG);
 776         ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 777
 778         dprintk(DEBUG_NORMAL, "ep0csr %x ep0state %s\n",
 779                 ep0csr, ep0states[dev->ep0state]);
 780
 781         /* clear stall status */
 782         if (ep0csr & S3C2410_UDC_EP0_CSR_SENTSTL) {
 783                 s3c2410_udc_nuke(dev, ep, -EPIPE);
 784                 dprintk(DEBUG_NORMAL, "... clear SENT_STALL ...\n");
 785                 s3c2410_udc_clear_ep0_sst(base_addr);
 786                 dev->ep0state = EP0_IDLE;
 787                 return;
 788         }
 789
 790         /* clear setup end */
 791         if (ep0csr & S3C2410_UDC_EP0_CSR_SE) {
 792                 dprintk(DEBUG_NORMAL, "... serviced SETUP_END ...\n");
 793                 s3c2410_udc_nuke(dev, ep, 0);
 794                 s3c2410_udc_clear_ep0_se(base_addr);
 795                 dev->ep0state = EP0_IDLE;
 796         }
 797
 798         switch (dev->ep0state) {
 799         case EP0_IDLE:
 800                 s3c2410_udc_handle_ep0_idle(dev, ep, &crq, ep0csr);
 801                 break;
 802
 803         case EP0_IN_DATA_PHASE:                 /* GET_DESCRIPTOR etc */
 804                 dprintk(DEBUG_NORMAL, "EP0_IN_DATA_PHASE ... what now?\n");
 805                 if (!(ep0csr & S3C2410_UDC_EP0_CSR_IPKRDY) && req)
 806                         s3c2410_udc_write_fifo(ep, req);
 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                 break;
 814
 815         case EP0_END_XFER:
 816                 dprintk(DEBUG_NORMAL, "EP0_END_XFER ... what now?\n");
 817                 dev->ep0state = EP0_IDLE;
 818                 break;
 819
 820         case EP0_STALL:
 821                 dprintk(DEBUG_NORMAL, "EP0_STALL ... what now?\n");
 822                 dev->ep0state = EP0_IDLE;
 823                 break;
 824         }
 825 }
 826
 827 /*
 828  *      handle_ep - Manage I/O endpoints
 829  */
 830
 831 static void s3c2410_udc_handle_ep(struct s3c2410_ep *ep)
 832 {
 833         struct s3c2410_request  *req;
 834         int                     is_in = ep->bEndpointAddress & USB_DIR_IN;
 835         u32                     ep_csr1;
 836         u32                     idx;
 837
 838         if (likely(!list_empty(&ep->queue)))
 839                 req = list_entry(ep->queue.next,
 840                                 struct s3c2410_request, queue);
 841         else
 842                 req = NULL;
 843
 844         idx = ep->bEndpointAddress & 0x7F;
 845
 846         if (is_in) {
 847                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 848                 ep_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
 849                 dprintk(DEBUG_VERBOSE, "ep%01d write csr:%02x %d\n",
 850                         idx, ep_csr1, req ? 1 : 0);
 851
 852                 if (ep_csr1 & S3C2410_UDC_ICSR1_SENTSTL) {
 853                         dprintk(DEBUG_VERBOSE, "st\n");
 854                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 855                         udc_write(ep_csr1 & ~S3C2410_UDC_ICSR1_SENTSTL,
 856                                         S3C2410_UDC_IN_CSR1_REG);
 857                         return;
 858                 }
 859
 860                 if (!(ep_csr1 & S3C2410_UDC_ICSR1_PKTRDY) && req)
 861                         s3c2410_udc_write_fifo(ep, req);
 862         } else {
 863                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 864                 ep_csr1 = udc_read(S3C2410_UDC_OUT_CSR1_REG);
 865                 dprintk(DEBUG_VERBOSE, "ep%01d rd csr:%02x\n", idx, ep_csr1);
 866
 867                 if (ep_csr1 & S3C2410_UDC_OCSR1_SENTSTL) {
 868                         udc_write(idx, S3C2410_UDC_INDEX_REG);
 869                         udc_write(ep_csr1 & ~S3C2410_UDC_OCSR1_SENTSTL,
 870                                         S3C2410_UDC_OUT_CSR1_REG);
 871                         return;
 872                 }
 873
 874                 if ((ep_csr1 & S3C2410_UDC_OCSR1_PKTRDY) && req)
 875                         s3c2410_udc_read_fifo(ep, req);
 876         }
 877 }
 878
 879 #include <mach/regs-irq.h>
 880
 881 /*
 882  *      s3c2410_udc_irq - interrupt handler
 883  */
 884 static irqreturn_t s3c2410_udc_irq(int dummy, void *_dev)
 885 {
 886         struct s3c2410_udc *dev = _dev;
 887         int usb_status;
 888         int usbd_status;
 889         int pwr_reg;
 890         int ep0csr;
 891         int i;
 892         u32 idx, idx2;
 893         unsigned long flags;
 894
 895         spin_lock_irqsave(&dev->lock, flags);
 896
 897         /* Driver connected ? */
 898         if (!dev->driver) {
 899                 /* Clear interrupts */
 900                 udc_write(udc_read(S3C2410_UDC_USB_INT_REG),
 901                                 S3C2410_UDC_USB_INT_REG);
 902                 udc_write(udc_read(S3C2410_UDC_EP_INT_REG),
 903                                 S3C2410_UDC_EP_INT_REG);
 904         }
 905
 906         /* Save index */
 907         idx = udc_read(S3C2410_UDC_INDEX_REG);
 908
 909         /* Read status registers */
 910         usb_status = udc_read(S3C2410_UDC_USB_INT_REG);
 911         usbd_status = udc_read(S3C2410_UDC_EP_INT_REG);
 912         pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
 913
 914         udc_writeb(base_addr, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
 915         ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
 916
 917         dprintk(DEBUG_NORMAL, "usbs=%02x, usbds=%02x, pwr=%02x ep0csr=%02x\n",
 918                 usb_status, usbd_status, pwr_reg, ep0csr);
 919
 920         /*
 921          * Now, handle interrupts. There's two types :
 922          * - Reset, Resume, Suspend coming -> usb_int_reg
 923          * - EP -> ep_int_reg
 924          */
 925
 926         /* RESET */
 927         if (usb_status & S3C2410_UDC_USBINT_RESET) {
 928                 /* two kind of reset :
 929                  * - reset start -> pwr reg = 8
 930                  * - reset end   -> pwr reg = 0
 931                  **/
 932                 dprintk(DEBUG_NORMAL, "USB reset csr %x pwr %x\n",
 933                         ep0csr, pwr_reg);
 934
 935                 dev->gadget.speed = USB_SPEED_UNKNOWN;
 936                 udc_write(0x00, S3C2410_UDC_INDEX_REG);
 937                 udc_write((dev->ep[0].ep.maxpacket & 0x7ff) >> 3,
 938                                 S3C2410_UDC_MAXP_REG);
 939                 dev->address = 0;
 940
 941                 dev->ep0state = EP0_IDLE;
 942                 dev->gadget.speed = USB_SPEED_FULL;
 943
 944                 /* clear interrupt */
 945                 udc_write(S3C2410_UDC_USBINT_RESET,
 946                                 S3C2410_UDC_USB_INT_REG);
 947
 948                 udc_write(idx, S3C2410_UDC_INDEX_REG);
 949                 spin_unlock_irqrestore(&dev->lock, flags);
 950                 return IRQ_HANDLED;
 951         }
 952
 953         /* RESUME */
 954         if (usb_status & S3C2410_UDC_USBINT_RESUME) {
 955                 dprintk(DEBUG_NORMAL, "USB resume\n");
 956
 957                 /* clear interrupt */
 958                 udc_write(S3C2410_UDC_USBINT_RESUME,
 959                                 S3C2410_UDC_USB_INT_REG);
 960
 961                 if (dev->gadget.speed != USB_SPEED_UNKNOWN
 962                                 && dev->driver
 963                                 && dev->driver->resume)
 964                         dev->driver->resume(&dev->gadget);
 965         }
 966
 967         /* SUSPEND */
 968         if (usb_status & S3C2410_UDC_USBINT_SUSPEND) {
 969                 dprintk(DEBUG_NORMAL, "USB suspend\n");
 970
 971                 /* clear interrupt */
 972                 udc_write(S3C2410_UDC_USBINT_SUSPEND,
 973                                 S3C2410_UDC_USB_INT_REG);
 974
 975                 if (dev->gadget.speed != USB_SPEED_UNKNOWN
 976                                 && dev->driver
 977                                 && dev->driver->suspend)
 978                         dev->driver->suspend(&dev->gadget);
 979
 980                 dev->ep0state = EP0_IDLE;
 981         }
 982
 983         /* EP */
 984         /* control traffic */
 985         /* check on ep0csr != 0 is not a good idea as clearing in_pkt_ready
 986          * generate an interrupt
 987          */
 988         if (usbd_status & S3C2410_UDC_INT_EP0) {
 989                 dprintk(DEBUG_VERBOSE, "USB ep0 irq\n");
 990                 /* Clear the interrupt bit by setting it to 1 */
 991                 udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_REG);
 992                 s3c2410_udc_handle_ep0(dev);
 993         }
 994
 995         /* endpoint data transfers */
 996         for (i = 1; i < S3C2410_ENDPOINTS; i++) {
 997                 u32 tmp = 1 << i;
 998                 if (usbd_status & tmp) {
 999                         dprintk(DEBUG_VERBOSE, "USB ep%d irq\n", i);
1000
1001                         /* Clear the interrupt bit by setting it to 1 */
1002                         udc_write(tmp, S3C2410_UDC_EP_INT_REG);
1003                         s3c2410_udc_handle_ep(&dev->ep[i]);
1004                 }
1005         }
1006
1007         /* what else causes this interrupt? a receive! who is it? */
1008         if (!usb_status && !usbd_status && !pwr_reg && !ep0csr) {
1009                 for (i = 1; i < S3C2410_ENDPOINTS; i++) {
1010                         idx2 = udc_read(S3C2410_UDC_INDEX_REG);
1011                         udc_write(i, S3C2410_UDC_INDEX_REG);
1012
1013                         if (udc_read(S3C2410_UDC_OUT_CSR1_REG) & 0x1)
1014                                 s3c2410_udc_handle_ep(&dev->ep[i]);
1015
1016                         /* restore index */
1017                         udc_write(idx2, S3C2410_UDC_INDEX_REG);
1018                 }
1019         }
1020
1021         dprintk(DEBUG_VERBOSE, "irq: %d s3c2410_udc_done.\n", IRQ_USBD);
1022
1023         /* Restore old index */
1024         udc_write(idx, S3C2410_UDC_INDEX_REG);
1025
1026         spin_unlock_irqrestore(&dev->lock, flags);
1027
1028         return IRQ_HANDLED;
1029 }
1030 /*------------------------- s3c2410_ep_ops ----------------------------------*/
1031
1032 static inline struct s3c2410_ep *to_s3c2410_ep(struct usb_ep *ep)
1033 {
1034         return container_of(ep, struct s3c2410_ep, ep);
1035 }
1036
1037 static inline struct s3c2410_udc *to_s3c2410_udc(struct usb_gadget *gadget)
1038 {
1039         return container_of(gadget, struct s3c2410_udc, gadget);
1040 }
1041
1042 static inline struct s3c2410_request *to_s3c2410_req(struct usb_request *req)
1043 {
1044         return container_of(req, struct s3c2410_request, req);
1045 }
1046
1047 /*
1048  *      s3c2410_udc_ep_enable
1049  */
1050 static int s3c2410_udc_ep_enable(struct usb_ep *_ep,
1051                                  const struct usb_endpoint_descriptor *desc)
1052 {
1053         struct s3c2410_udc      *dev;
1054         struct s3c2410_ep       *ep;
1055         u32                     max, tmp;
1056         unsigned long           flags;
1057         u32                     csr1, csr2;
1058         u32                     int_en_reg;
1059
1060         ep = to_s3c2410_ep(_ep);
1061
1062         if (!_ep || !desc
1063                         || _ep->name == ep0name
1064                         || desc->bDescriptorType != USB_DT_ENDPOINT)
1065                 return -EINVAL;
1066
1067         dev = ep->dev;
1068         if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
1069                 return -ESHUTDOWN;
1070
1071         max = usb_endpoint_maxp(desc) & 0x1fff;
1072
1073         local_irq_save(flags);
1074         _ep->maxpacket = max & 0x7ff;
1075         ep->ep.desc = desc;
1076         ep->halted = 0;
1077         ep->bEndpointAddress = desc->bEndpointAddress;
1078
1079         /* set max packet */
1080         udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1081         udc_write(max >> 3, S3C2410_UDC_MAXP_REG);
1082
1083         /* set type, direction, address; reset fifo counters */
1084         if (desc->bEndpointAddress & USB_DIR_IN) {
1085                 csr1 = S3C2410_UDC_ICSR1_FFLUSH|S3C2410_UDC_ICSR1_CLRDT;
1086                 csr2 = S3C2410_UDC_ICSR2_MODEIN|S3C2410_UDC_ICSR2_DMAIEN;
1087
1088                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1089                 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1090                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1091                 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1092         } else {
1093                 /* don't flush in fifo or it will cause endpoint interrupt */
1094                 csr1 = S3C2410_UDC_ICSR1_CLRDT;
1095                 csr2 = S3C2410_UDC_ICSR2_DMAIEN;
1096
1097                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1098                 udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
1099                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1100                 udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
1101
1102                 csr1 = S3C2410_UDC_OCSR1_FFLUSH | S3C2410_UDC_OCSR1_CLRDT;
1103                 csr2 = S3C2410_UDC_OCSR2_DMAIEN;
1104
1105                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1106                 udc_write(csr1, S3C2410_UDC_OUT_CSR1_REG);
1107                 udc_write(ep->num, S3C2410_UDC_INDEX_REG);
1108                 udc_write(csr2, S3C2410_UDC_OUT_CSR2_REG);
1109         }
1110
1111         /* enable irqs */
1112         int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1113         udc_write(int_en_reg | (1 << ep->num), S3C2410_UDC_EP_INT_EN_REG);
1114
1115         /* print some debug message */
1116         tmp = desc->bEndpointAddress;
1117         dprintk(DEBUG_NORMAL, "enable %s(%d) ep%x%s-blk max %02x\n",
1118                  _ep->name, ep->num, tmp,
1119                  desc->bEndpointAddress & USB_DIR_IN ? "in" : "out", max);
1120
1121         local_irq_restore(flags);
1122         s3c2410_udc_set_halt(_ep, 0);
1123
1124         return 0;
1125 }
1126
1127 /*
1128  * s3c2410_udc_ep_disable
1129  */
1130 static int s3c2410_udc_ep_disable(struct usb_ep *_ep)
1131 {
1132         struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
1133         unsigned long flags;
1134         u32 int_en_reg;
1135
1136         if (!_ep || !ep->ep.desc) {
1137                 dprintk(DEBUG_NORMAL, "%s not enabled\n",
1138                         _ep ? ep->ep.name : NULL);
1139                 return -EINVAL;
1140         }
1141
1142         local_irq_save(flags);
1143
1144         dprintk(DEBUG_NORMAL, "ep_disable: %s\n", _ep->name);
1145
1146         ep->ep.desc = NULL;
1147         ep->halted = 1;
1148
1149         s3c2410_udc_nuke(ep->dev, ep, -ESHUTDOWN);
1150
1151         /* disable irqs */
1152         int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
1153         udc_write(int_en_reg & ~(1<<ep->num), S3C2410_UDC_EP_INT_EN_REG);
1154
1155         local_irq_restore(flags);
1156
1157         dprintk(DEBUG_NORMAL, "%s disabled\n", _ep->name);
1158
1159         return 0;
1160 }
1161
1162 /*
1163  * s3c2410_udc_alloc_request
1164  */
1165 static struct usb_request *
1166 s3c2410_udc_alloc_request(struct usb_ep *_ep, gfp_t mem_flags)
1167 {
1168         struct s3c2410_request *req;
1169
1170         dprintk(DEBUG_VERBOSE, "%s(%p,%d)\n", __func__, _ep, mem_flags);
1171
1172         if (!_ep)
1173                 return NULL;
1174
1175         req = kzalloc(sizeof(struct s3c2410_request), mem_flags);
1176         if (!req)
1177                 return NULL;
1178
1179         INIT_LIST_HEAD(&req->queue);
1180         return &req->req;
1181 }
1182
1183 /*
1184  * s3c2410_udc_free_request
1185  */
1186 static void
1187 s3c2410_udc_free_request(struct usb_ep *_ep, struct usb_request *_req)
1188 {
1189         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1190         struct s3c2410_request  *req = to_s3c2410_req(_req);
1191
1192         dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1193
1194         if (!ep || !_req || (!ep->ep.desc && _ep->name != ep0name))
1195                 return;
1196
1197         WARN_ON(!list_empty(&req->queue));
1198         kfree(req);
1199 }
1200
1201 /*
1202  *      s3c2410_udc_queue
1203  */
1204 static int s3c2410_udc_queue(struct usb_ep *_ep, struct usb_request *_req,
1205                 gfp_t gfp_flags)
1206 {
1207         struct s3c2410_request  *req = to_s3c2410_req(_req);
1208         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1209         struct s3c2410_udc      *dev;
1210         u32                     ep_csr = 0;
1211         int                     fifo_count = 0;
1212         unsigned long           flags;
1213
1214         if (unlikely(!_ep || (!ep->ep.desc && ep->ep.name != ep0name))) {
1215                 dprintk(DEBUG_NORMAL, "%s: invalid args\n", __func__);
1216                 return -EINVAL;
1217         }
1218
1219         dev = ep->dev;
1220         if (unlikely(!dev->driver
1221                         || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
1222                 return -ESHUTDOWN;
1223         }
1224
1225         local_irq_save(flags);
1226
1227         if (unlikely(!_req || !_req->complete
1228                         || !_req->buf || !list_empty(&req->queue))) {
1229                 if (!_req)
1230                         dprintk(DEBUG_NORMAL, "%s: 1 X X X\n", __func__);
1231                 else {
1232                         dprintk(DEBUG_NORMAL, "%s: 0 %01d %01d %01d\n",
1233                                 __func__, !_req->complete, !_req->buf,
1234                                 !list_empty(&req->queue));
1235                 }
1236
1237                 local_irq_restore(flags);
1238                 return -EINVAL;
1239         }
1240
1241         _req->status = -EINPROGRESS;
1242         _req->actual = 0;
1243
1244         dprintk(DEBUG_VERBOSE, "%s: ep%x len %d\n",
1245                  __func__, ep->bEndpointAddress, _req->length);
1246
1247         if (ep->bEndpointAddress) {
1248                 udc_write(ep->bEndpointAddress & 0x7F, S3C2410_UDC_INDEX_REG);
1249
1250                 ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
1251                                 ? S3C2410_UDC_IN_CSR1_REG
1252                                 : S3C2410_UDC_OUT_CSR1_REG);
1253                 fifo_count = s3c2410_udc_fifo_count_out();
1254         } else {
1255                 udc_write(0, S3C2410_UDC_INDEX_REG);
1256                 ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
1257                 fifo_count = s3c2410_udc_fifo_count_out();
1258         }
1259
1260         /* kickstart this i/o queue? */
1261         if (list_empty(&ep->queue) && !ep->halted) {
1262                 if (ep->bEndpointAddress == 0 /* ep0 */) {
1263                         switch (dev->ep0state) {
1264                         case EP0_IN_DATA_PHASE:
1265                                 if (!(ep_csr&S3C2410_UDC_EP0_CSR_IPKRDY)
1266                                                 && s3c2410_udc_write_fifo(ep,
1267                                                         req)) {
1268                                         dev->ep0state = EP0_IDLE;
1269                                         req = NULL;
1270                                 }
1271                                 break;
1272
1273                         case EP0_OUT_DATA_PHASE:
1274                                 if ((!_req->length)
1275                                         || ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1276                                                 && s3c2410_udc_read_fifo(ep,
1277                                                         req))) {
1278                                         dev->ep0state = EP0_IDLE;
1279                                         req = NULL;
1280                                 }
1281                                 break;
1282
1283                         default:
1284                                 local_irq_restore(flags);
1285                                 return -EL2HLT;
1286                         }
1287                 } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0
1288                                 && (!(ep_csr&S3C2410_UDC_OCSR1_PKTRDY))
1289                                 && s3c2410_udc_write_fifo(ep, req)) {
1290                         req = NULL;
1291                 } else if ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
1292                                 && fifo_count
1293                                 && s3c2410_udc_read_fifo(ep, req)) {
1294                         req = NULL;
1295                 }
1296         }
1297
1298         /* pio or dma irq handler advances the queue. */
1299         if (likely(req))
1300                 list_add_tail(&req->queue, &ep->queue);
1301
1302         local_irq_restore(flags);
1303
1304         dprintk(DEBUG_VERBOSE, "%s ok\n", __func__);
1305         return 0;
1306 }
1307
1308 /*
1309  *      s3c2410_udc_dequeue
1310  */
1311 static int s3c2410_udc_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1312 {
1313         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1314         struct s3c2410_udc      *udc;
1315         int                     retval = -EINVAL;
1316         unsigned long           flags;
1317         struct s3c2410_request  *req = NULL;
1318
1319         dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
1320
1321         if (!the_controller->driver)
1322                 return -ESHUTDOWN;
1323
1324         if (!_ep || !_req)
1325                 return retval;
1326
1327         udc = to_s3c2410_udc(ep->gadget);
1328
1329         local_irq_save(flags);
1330
1331         list_for_each_entry(req, &ep->queue, queue) {
1332                 if (&req->req == _req) {
1333                         list_del_init(&req->queue);
1334                         _req->status = -ECONNRESET;
1335                         retval = 0;
1336                         break;
1337                 }
1338         }
1339
1340         if (retval == 0) {
1341                 dprintk(DEBUG_VERBOSE,
1342                         "dequeued req %p from %s, len %d buf %p\n",
1343                         req, _ep->name, _req->length, _req->buf);
1344
1345                 s3c2410_udc_done(ep, req, -ECONNRESET);
1346         }
1347
1348         local_irq_restore(flags);
1349         return retval;
1350 }
1351
1352 /*
1353  * s3c2410_udc_set_halt
1354  */
1355 static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value)
1356 {
1357         struct s3c2410_ep       *ep = to_s3c2410_ep(_ep);
1358         u32                     ep_csr = 0;
1359         unsigned long           flags;
1360         u32                     idx;
1361
1362         if (unlikely(!_ep || (!ep->ep.desc && ep->ep.name != ep0name))) {
1363                 dprintk(DEBUG_NORMAL, "%s: inval 2\n", __func__);
1364                 return -EINVAL;
1365         }
1366
1367         local_irq_save(flags);
1368
1369         idx = ep->bEndpointAddress & 0x7F;
1370
1371         if (idx == 0) {
1372                 s3c2410_udc_set_ep0_ss(base_addr);
1373                 s3c2410_udc_set_ep0_de_out(base_addr);
1374         } else {
1375                 udc_write(idx, S3C2410_UDC_INDEX_REG);
1376                 ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
1377                                 ? S3C2410_UDC_IN_CSR1_REG
1378                                 : S3C2410_UDC_OUT_CSR1_REG);
1379
1380                 if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
1381                         if (value)
1382                                 udc_write(ep_csr | S3C2410_UDC_ICSR1_SENDSTL,
1383                                         S3C2410_UDC_IN_CSR1_REG);
1384                         else {
1385                                 ep_csr &= ~S3C2410_UDC_ICSR1_SENDSTL;
1386                                 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1387                                 ep_csr |= S3C2410_UDC_ICSR1_CLRDT;
1388                                 udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
1389                         }
1390                 } else {
1391                         if (value)
1392                                 udc_write(ep_csr | S3C2410_UDC_OCSR1_SENDSTL,
1393                                         S3C2410_UDC_OUT_CSR1_REG);
1394                         else {
1395                                 ep_csr &= ~S3C2410_UDC_OCSR1_SENDSTL;
1396                                 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1397                                 ep_csr |= S3C2410_UDC_OCSR1_CLRDT;
1398                                 udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
1399                         }
1400                 }
1401         }
1402
1403         ep->halted = value ? 1 : 0;
1404         local_irq_restore(flags);
1405
1406         return 0;
1407 }
1408
1409 static const struct usb_ep_ops s3c2410_ep_ops = {
1410         .enable         = s3c2410_udc_ep_enable,
1411         .disable        = s3c2410_udc_ep_disable,
1412
1413         .alloc_request  = s3c2410_udc_alloc_request,
1414         .free_request   = s3c2410_udc_free_request,
1415
1416         .queue          = s3c2410_udc_queue,
1417         .dequeue        = s3c2410_udc_dequeue,
1418
1419         .set_halt       = s3c2410_udc_set_halt,
1420 };
1421
1422 /*------------------------- usb_gadget_ops ----------------------------------*/
1423
1424 /*
1425  *      s3c2410_udc_get_frame
1426  */
1427 static int s3c2410_udc_get_frame(struct usb_gadget *_gadget)
1428 {
1429         int tmp;
1430
1431         dprintk(DEBUG_VERBOSE, "%s()\n", __func__);
1432
1433         tmp = udc_read(S3C2410_UDC_FRAME_NUM2_REG) << 8;
1434         tmp |= udc_read(S3C2410_UDC_FRAME_NUM1_REG);
1435         return tmp;
1436 }
1437
1438 /*
1439  *      s3c2410_udc_wakeup
1440  */
1441 static int s3c2410_udc_wakeup(struct usb_gadget *_gadget)
1442 {
1443         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1444         return 0;
1445 }
1446
1447 /*
1448  *      s3c2410_udc_set_selfpowered
1449  */
1450 static int s3c2410_udc_set_selfpowered(struct usb_gadget *gadget, int value)
1451 {
1452         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1453
1454         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1455
1456         if (value)
1457                 udc->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
1458         else
1459                 udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
1460
1461         return 0;
1462 }
1463
1464 static void s3c2410_udc_disable(struct s3c2410_udc *dev);
1465 static void s3c2410_udc_enable(struct s3c2410_udc *dev);
1466
1467 static int s3c2410_udc_set_pullup(struct s3c2410_udc *udc, int is_on)
1468 {
1469         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1470
1471         if (udc_info && (udc_info->udc_command ||
1472                 gpio_is_valid(udc_info->pullup_pin))) {
1473
1474                 if (is_on)
1475                         s3c2410_udc_enable(udc);
1476                 else {
1477                         if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
1478                                 if (udc->driver && udc->driver->disconnect)
1479                                         udc->driver->disconnect(&udc->gadget);
1480
1481                         }
1482                         s3c2410_udc_disable(udc);
1483                 }
1484         } else {
1485                 return -EOPNOTSUPP;
1486         }
1487
1488         return 0;
1489 }
1490
1491 static int s3c2410_udc_vbus_session(struct usb_gadget *gadget, int is_active)
1492 {
1493         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1494
1495         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1496
1497         udc->vbus = (is_active != 0);
1498         s3c2410_udc_set_pullup(udc, is_active);
1499         return 0;
1500 }
1501
1502 static int s3c2410_udc_pullup(struct usb_gadget *gadget, int is_on)
1503 {
1504         struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
1505
1506         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1507
1508         s3c2410_udc_set_pullup(udc, is_on ? 0 : 1);
1509         return 0;
1510 }
1511
1512 static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev)
1513 {
1514         struct s3c2410_udc      *dev = _dev;
1515         unsigned int            value;
1516
1517         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1518
1519         value = gpio_get_value(udc_info->vbus_pin) ? 1 : 0;
1520         if (udc_info->vbus_pin_inverted)
1521                 value = !value;
1522
1523         if (value != dev->vbus)
1524                 s3c2410_udc_vbus_session(&dev->gadget, value);
1525
1526         return IRQ_HANDLED;
1527 }
1528
1529 static int s3c2410_vbus_draw(struct usb_gadget *_gadget, unsigned ma)
1530 {
1531         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1532
1533         if (udc_info && udc_info->vbus_draw) {
1534                 udc_info->vbus_draw(ma);
1535                 return 0;
1536         }
1537
1538         return -ENOTSUPP;
1539 }
1540
1541 static int s3c2410_udc_start(struct usb_gadget *g,
1542                 struct usb_gadget_driver *driver);
1543 static int s3c2410_udc_stop(struct usb_gadget *g,
1544                 struct usb_gadget_driver *driver);
1545
1546 static const struct usb_gadget_ops s3c2410_ops = {
1547         .get_frame              = s3c2410_udc_get_frame,
1548         .wakeup                 = s3c2410_udc_wakeup,
1549         .set_selfpowered        = s3c2410_udc_set_selfpowered,
1550         .pullup                 = s3c2410_udc_pullup,
1551         .vbus_session           = s3c2410_udc_vbus_session,
1552         .vbus_draw              = s3c2410_vbus_draw,
1553         .udc_start              = s3c2410_udc_start,
1554         .udc_stop               = s3c2410_udc_stop,
1555 };
1556
1557 static void s3c2410_udc_command(enum s3c2410_udc_cmd_e cmd)
1558 {
1559         if (!udc_info)
1560                 return;
1561
1562         if (udc_info->udc_command) {
1563                 udc_info->udc_command(cmd);
1564         } else if (gpio_is_valid(udc_info->pullup_pin)) {
1565                 int value;
1566
1567                 switch (cmd) {
1568                 case S3C2410_UDC_P_ENABLE:
1569                         value = 1;
1570                         break;
1571                 case S3C2410_UDC_P_DISABLE:
1572                         value = 0;
1573                         break;
1574                 default:
1575                         return;
1576                 }
1577                 value ^= udc_info->pullup_pin_inverted;
1578
1579                 gpio_set_value(udc_info->pullup_pin, value);
1580         }
1581 }
1582
1583 /*------------------------- gadget driver handling---------------------------*/
1584 /*
1585  * s3c2410_udc_disable
1586  */
1587 static void s3c2410_udc_disable(struct s3c2410_udc *dev)
1588 {
1589         dprintk(DEBUG_NORMAL, "%s()\n", __func__);
1590
1591         /* Disable all interrupts */
1592         udc_write(0x00, S3C2410_UDC_USB_INT_EN_REG);
1593         udc_write(0x00, S3C2410_UDC_EP_INT_EN_REG);
1594
1595         /* Clear the interrupt registers */
1596         udc_write(S3C2410_UDC_USBINT_RESET
1597                                 | S3C2410_UDC_USBINT_RESUME
1598                                 | S3C2410_UDC_USBINT_SUSPEND,
1599                         S3C2410_UDC_USB_INT_REG);
1600
1601         udc_write(0x1F, S3C2410_UDC_EP_INT_REG);
1602
1603         /* Good bye, cruel world */
1604         s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
1605
1606         /* Set speed to unknown */
1607         dev->gadget.speed = USB_SPEED_UNKNOWN;
1608 }
1609
1610 /*
1611  * s3c2410_udc_reinit
1612  */
1613 static void s3c2410_udc_reinit(struct s3c2410_udc *dev)
1614 {
1615         u32 i;
1616
1617         /* device/ep0 records init */
1618         INIT_LIST_HEAD(&dev->gadget.ep_list);
1619         INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
1620         dev->ep0state = EP0_IDLE;
1621
1622         for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1623                 struct s3c2410_ep *ep = &dev->ep[i];
1624
1625                 if (i != 0)
1626                         list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
1627
1628                 ep->dev = dev;
1629                 ep->ep.desc = NULL;
1630                 ep->halted = 0;
1631                 INIT_LIST_HEAD(&ep->queue);
1632         }
1633 }
1634
1635 /*
1636  * s3c2410_udc_enable
1637  */
1638 static void s3c2410_udc_enable(struct s3c2410_udc *dev)
1639 {
1640         int i;
1641
1642         dprintk(DEBUG_NORMAL, "s3c2410_udc_enable called\n");
1643
1644         /* dev->gadget.speed = USB_SPEED_UNKNOWN; */
1645         dev->gadget.speed = USB_SPEED_FULL;
1646
1647         /* Set MAXP for all endpoints */
1648         for (i = 0; i < S3C2410_ENDPOINTS; i++) {
1649                 udc_write(i, S3C2410_UDC_INDEX_REG);
1650                 udc_write((dev->ep[i].ep.maxpacket & 0x7ff) >> 3,
1651                                 S3C2410_UDC_MAXP_REG);
1652         }
1653
1654         /* Set default power state */
1655         udc_write(DEFAULT_POWER_STATE, S3C2410_UDC_PWR_REG);
1656
1657         /* Enable reset and suspend interrupt interrupts */
1658         udc_write(S3C2410_UDC_USBINT_RESET | S3C2410_UDC_USBINT_SUSPEND,
1659                         S3C2410_UDC_USB_INT_EN_REG);
1660
1661         /* Enable ep0 interrupt */
1662         udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_EN_REG);
1663
1664         /* time to say "hello, world" */
1665         s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
1666 }
1667
1668 static int s3c2410_udc_start(struct usb_gadget *g,
1669                 struct usb_gadget_driver *driver)
1670 {
1671         struct s3c2410_udc *udc = to_s3c2410(g);
1672
1673         dprintk(DEBUG_NORMAL, "%s() '%s'\n", __func__, driver->driver.name);
1674
1675         /* Hook the driver */
1676         udc->driver = driver;
1677
1678         /* Enable udc */
1679         s3c2410_udc_enable(udc);
1680
1681         return 0;
1682 }
1683
1684 static int s3c2410_udc_stop(struct usb_gadget *g,
1685                 struct usb_gadget_driver *driver)
1686 {
1687         struct s3c2410_udc *udc = to_s3c2410(g);
1688
1689         udc->driver = NULL;
1690
1691         /* Disable udc */
1692         s3c2410_udc_disable(udc);
1693
1694         return 0;
1695 }
1696
1697 /*---------------------------------------------------------------------------*/
1698 static struct s3c2410_udc memory = {
1699         .gadget = {
1700                 .ops            = &s3c2410_ops,
1701                 .ep0            = &memory.ep[0].ep,
1702                 .name           = gadget_name,
1703                 .dev = {
1704                         .init_name      = "gadget",
1705                 },
1706         },
1707
1708         /* control endpoint */
1709         .ep[0] = {
1710                 .num            = 0,
1711                 .ep = {
1712                         .name           = ep0name,
1713                         .ops            = &s3c2410_ep_ops,
1714                         .maxpacket      = EP0_FIFO_SIZE,
1715                 },
1716                 .dev            = &memory,
1717         },
1718
1719         /* first group of endpoints */
1720         .ep[1] = {
1721                 .num            = 1,
1722                 .ep = {
1723                         .name           = "ep1-bulk",
1724                         .ops            = &s3c2410_ep_ops,
1725                         .maxpacket      = EP_FIFO_SIZE,
1726                 },
1727                 .dev            = &memory,
1728                 .fifo_size      = EP_FIFO_SIZE,
1729                 .bEndpointAddress = 1,
1730                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1731         },
1732         .ep[2] = {
1733                 .num            = 2,
1734                 .ep = {
1735                         .name           = "ep2-bulk",
1736                         .ops            = &s3c2410_ep_ops,
1737                         .maxpacket      = EP_FIFO_SIZE,
1738                 },
1739                 .dev            = &memory,
1740                 .fifo_size      = EP_FIFO_SIZE,
1741                 .bEndpointAddress = 2,
1742                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1743         },
1744         .ep[3] = {
1745                 .num            = 3,
1746                 .ep = {
1747                         .name           = "ep3-bulk",
1748                         .ops            = &s3c2410_ep_ops,
1749                         .maxpacket      = EP_FIFO_SIZE,
1750                 },
1751                 .dev            = &memory,
1752                 .fifo_size      = EP_FIFO_SIZE,
1753                 .bEndpointAddress = 3,
1754                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1755         },
1756         .ep[4] = {
1757                 .num            = 4,
1758                 .ep = {
1759                         .name           = "ep4-bulk",
1760                         .ops            = &s3c2410_ep_ops,
1761                         .maxpacket      = EP_FIFO_SIZE,
1762                 },
1763                 .dev            = &memory,
1764                 .fifo_size      = EP_FIFO_SIZE,
1765                 .bEndpointAddress = 4,
1766                 .bmAttributes   = USB_ENDPOINT_XFER_BULK,
1767         }
1768
1769 };
1770
1771 /*
1772  *      probe - binds to the platform device
1773  */
1774 static int s3c2410_udc_probe(struct platform_device *pdev)
1775 {
1776         struct s3c2410_udc *udc = &memory;
1777         struct device *dev = &pdev->dev;
1778         int retval;
1779         int irq;
1780
1781         dev_dbg(dev, "%s()\n", __func__);
1782
1783         usb_bus_clock = clk_get(NULL, "usb-bus-gadget");
1784         if (IS_ERR(usb_bus_clock)) {
1785                 dev_err(dev, "failed to get usb bus clock source\n");
1786                 return PTR_ERR(usb_bus_clock);
1787         }
1788
1789         clk_enable(usb_bus_clock);
1790
1791         udc_clock = clk_get(NULL, "usb-device");
1792         if (IS_ERR(udc_clock)) {
1793                 dev_err(dev, "failed to get udc clock source\n");
1794                 return PTR_ERR(udc_clock);
1795         }
1796
1797         clk_enable(udc_clock);
1798
1799         mdelay(10);
1800
1801         dev_dbg(dev, "got and enabled clocks\n");
1802
1803         if (strncmp(pdev->name, "s3c2440", 7) == 0) {
1804                 dev_info(dev, "S3C2440: increasing FIFO to 128 bytes\n");
1805                 memory.ep[1].fifo_size = S3C2440_EP_FIFO_SIZE;
1806                 memory.ep[2].fifo_size = S3C2440_EP_FIFO_SIZE;
1807                 memory.ep[3].fifo_size = S3C2440_EP_FIFO_SIZE;
1808                 memory.ep[4].fifo_size = S3C2440_EP_FIFO_SIZE;
1809         }
1810
1811         spin_lock_init(&udc->lock);
1812         udc_info = pdev->dev.platform_data;
1813
1814         rsrc_start = S3C2410_PA_USBDEV;
1815         rsrc_len   = S3C24XX_SZ_USBDEV;
1816
1817         if (!request_mem_region(rsrc_start, rsrc_len, gadget_name))
1818                 return -EBUSY;
1819
1820         base_addr = ioremap(rsrc_start, rsrc_len);
1821         if (!base_addr) {
1822                 retval = -ENOMEM;
1823                 goto err_mem;
1824         }
1825
1826         the_controller = udc;
1827         platform_set_drvdata(pdev, udc);
1828
1829         s3c2410_udc_disable(udc);
1830         s3c2410_udc_reinit(udc);
1831
1832         /* irq setup after old hardware state is cleaned up */
1833         retval = request_irq(IRQ_USBD, s3c2410_udc_irq,
1834                              0, gadget_name, udc);
1835
1836         if (retval != 0) {
1837                 dev_err(dev, "cannot get irq %i, err %d\n", IRQ_USBD, retval);
1838                 retval = -EBUSY;
1839                 goto err_map;
1840         }
1841
1842         dev_dbg(dev, "got irq %i\n", IRQ_USBD);
1843
1844         if (udc_info && udc_info->vbus_pin > 0) {
1845                 retval = gpio_request(udc_info->vbus_pin, "udc vbus");
1846                 if (retval < 0) {
1847                         dev_err(dev, "cannot claim vbus pin\n");
1848                         goto err_int;
1849                 }
1850
1851                 irq = gpio_to_irq(udc_info->vbus_pin);
1852                 if (irq < 0) {
1853                         dev_err(dev, "no irq for gpio vbus pin\n");
1854                         retval = irq;
1855                         goto err_gpio_claim;
1856                 }
1857
1858                 retval = request_irq(irq, s3c2410_udc_vbus_irq,
1859                                      IRQF_TRIGGER_RISING
1860                                      | IRQF_TRIGGER_FALLING | IRQF_SHARED,
1861                                      gadget_name, udc);
1862
1863                 if (retval != 0) {
1864                         dev_err(dev, "can't get vbus irq %d, err %d\n",
1865                                 irq, retval);
1866                         retval = -EBUSY;
1867                         goto err_gpio_claim;
1868                 }
1869
1870                 dev_dbg(dev, "got irq %i\n", irq);
1871         } else {
1872                 udc->vbus = 1;
1873         }
1874
1875         if (udc_info && !udc_info->udc_command &&
1876                 gpio_is_valid(udc_info->pullup_pin)) {
1877
1878                 retval = gpio_request_one(udc_info->pullup_pin,
1879                                 udc_info->vbus_pin_inverted ?
1880                                 GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
1881                                 "udc pullup");
1882                 if (retval)
1883                         goto err_vbus_irq;
1884         }
1885
1886         retval = usb_add_gadget_udc(&pdev->dev, &udc->gadget);
1887         if (retval)
1888                 goto err_add_udc;
1889
1890         if (s3c2410_udc_debugfs_root) {
1891                 udc->regs_info = debugfs_create_file("registers", S_IRUGO,
1892                                 s3c2410_udc_debugfs_root,
1893                                 udc, &s3c2410_udc_debugfs_fops);
1894                 if (!udc->regs_info)
1895                         dev_warn(dev, "debugfs file creation failed\n");
1896         }
1897
1898         dev_dbg(dev, "probe ok\n");
1899
1900         return 0;
1901
1902 err_add_udc:
1903         if (udc_info && !udc_info->udc_command &&
1904                         gpio_is_valid(udc_info->pullup_pin))
1905                 gpio_free(udc_info->pullup_pin);
1906 err_vbus_irq:
1907         if (udc_info && udc_info->vbus_pin > 0)
1908                 free_irq(gpio_to_irq(udc_info->vbus_pin), udc);
1909 err_gpio_claim:
1910         if (udc_info && udc_info->vbus_pin > 0)
1911                 gpio_free(udc_info->vbus_pin);
1912 err_int:
1913         free_irq(IRQ_USBD, udc);
1914 err_map:
1915         iounmap(base_addr);
1916 err_mem:
1917         release_mem_region(rsrc_start, rsrc_len);
1918
1919         return retval;
1920 }
1921
1922 /*
1923  *      s3c2410_udc_remove
1924  */
1925 static int s3c2410_udc_remove(struct platform_device *pdev)
1926 {
1927         struct s3c2410_udc *udc = platform_get_drvdata(pdev);
1928         unsigned int irq;
1929
1930         dev_dbg(&pdev->dev, "%s()\n", __func__);
1931
1932         if (udc->driver)
1933                 return -EBUSY;
1934
1935         usb_del_gadget_udc(&udc->gadget);
1936         debugfs_remove(udc->regs_info);
1937
1938         if (udc_info && !udc_info->udc_command &&
1939                 gpio_is_valid(udc_info->pullup_pin))
1940                 gpio_free(udc_info->pullup_pin);
1941
1942         if (udc_info && udc_info->vbus_pin > 0) {
1943                 irq = gpio_to_irq(udc_info->vbus_pin);
1944                 free_irq(irq, udc);
1945         }
1946
1947         free_irq(IRQ_USBD, udc);
1948
1949         iounmap(base_addr);
1950         release_mem_region(rsrc_start, rsrc_len);
1951
1952         if (!IS_ERR(udc_clock) && udc_clock != NULL) {
1953                 clk_disable(udc_clock);
1954                 clk_put(udc_clock);
1955                 udc_clock = NULL;
1956         }
1957
1958         if (!IS_ERR(usb_bus_clock) && usb_bus_clock != NULL) {
1959                 clk_disable(usb_bus_clock);
1960                 clk_put(usb_bus_clock);
1961                 usb_bus_clock = NULL;
1962         }
1963
1964         dev_dbg(&pdev->dev, "%s: remove ok\n", __func__);
1965         return 0;
1966 }
1967
1968 #ifdef CONFIG_PM
1969 static int
1970 s3c2410_udc_suspend(struct platform_device *pdev, pm_message_t message)
1971 {
1972         s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
1973
1974         return 0;
1975 }
1976
1977 static int s3c2410_udc_resume(struct platform_device *pdev)
1978 {
1979         s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
1980
1981         return 0;
1982 }
1983 #else
1984 #define s3c2410_udc_suspend     NULL
1985 #define s3c2410_udc_resume      NULL
1986 #endif
1987
1988 static const struct platform_device_id s3c_udc_ids[] = {
1989         { "s3c2410-usbgadget", },
1990         { "s3c2440-usbgadget", },
1991         { }
1992 };
1993 MODULE_DEVICE_TABLE(platform, s3c_udc_ids);
1994
1995 static struct platform_driver udc_driver_24x0 = {
1996         .driver         = {
1997                 .name   = "s3c24x0-usbgadget",
1998                 .owner  = THIS_MODULE,
1999         },
2000         .probe          = s3c2410_udc_probe,
2001         .remove         = s3c2410_udc_remove,
2002         .suspend        = s3c2410_udc_suspend,
2003         .resume         = s3c2410_udc_resume,
2004         .id_table       = s3c_udc_ids,
2005 };
2006
2007 static int __init udc_init(void)
2008 {
2009         int retval;
2010
2011         dprintk(DEBUG_NORMAL, "%s: version %s\n", gadget_name, DRIVER_VERSION);
2012
2013         s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name, NULL);
2014         if (IS_ERR(s3c2410_udc_debugfs_root)) {
2015                 pr_err("%s: debugfs dir creation failed %ld\n",
2016                         gadget_name, PTR_ERR(s3c2410_udc_debugfs_root));
2017                 s3c2410_udc_debugfs_root = NULL;
2018         }
2019
2020         retval = platform_driver_register(&udc_driver_24x0);
2021         if (retval)
2022                 goto err;
2023
2024         return 0;
2025
2026 err:
2027         debugfs_remove(s3c2410_udc_debugfs_root);
2028         return retval;
2029 }
2030
2031 static void __exit udc_exit(void)
2032 {
2033         platform_driver_unregister(&udc_driver_24x0);
2034         debugfs_remove(s3c2410_udc_debugfs_root);
2035 }
2036
2037 module_init(udc_init);
2038 module_exit(udc_exit);
2039
2040 MODULE_AUTHOR(DRIVER_AUTHOR);
2041 MODULE_DESCRIPTION(DRIVER_DESC);
2042 MODULE_VERSION(DRIVER_VERSION);
2043 MODULE_LICENSE("GPL");