git.sur5r.net Git - u-boot/blob - cpu/arm920t/usb_ohci.c

   1 /*
   2  * URB OHCI HCD (Host Controller Driver) for USB on the S3C2400.
   3  *
   4  * (C) Copyright 2003
   5  * Gary Jennejohn, DENX Software Engineering <gj@denx.de>
   6  *
   7  * See file CREDITS for list of people who contributed to this
   8  * project.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of
  13  * the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23  * MA 02111-1307 USA
  24  *
  25  * Note: Part of this code has been derived from linux
  26  *
  27  */
  28 /*
  29  * IMPORTANT NOTES
  30  * 1 - you MUST define LITTLEENDIAN in the configuration file for the
  31  *     board or this driver will NOT work!
  32  * 2 - this driver is intended for use with USB Mass Storage Devices
  33  *     (BBB) ONLY. There is NO support for Interrupt or Isochronous pipes!
  34  */
  35
  36 #include <common.h>
  37 /* #include <pci.h> no PCI on the S3C2400 */
  38
  39 #ifdef CONFIG_USB_OHCI
  40
  41 #include <s3c2400.h>
  42 #include <malloc.h>
  43 #include <usb.h>
  44 #include "usb_ohci.h"
  45
  46 #define OHCI_USE_NPS            /* force NoPowerSwitching mode */
  47 #undef OHCI_VERBOSE_DEBUG       /* not always helpful */
  48
  49
  50 /* For initializing controller (mask in an HCFS mode too) */
  51 #define OHCI_CONTROL_INIT \
  52         (OHCI_CTRL_CBSR & 0x3) | OHCI_CTRL_IE | OHCI_CTRL_PLE
  53
  54 #define readl(a) (*((vu_long *)(a)))
  55 #define writel(a, b) (*((vu_long *)(b)) = ((vu_long)a))
  56
  57 #define min_t(type,x,y) ({ type __x = (x); type __y = (y); __x < __y ? __x: __y; })
  58
  59 #undef DEBUG
  60 #ifdef DEBUG
  61 #define dbg(format, arg...) printf("DEBUG: " format "\n", ## arg)
  62 #else
  63 #define dbg(format, arg...) do {} while(0)
  64 #endif /* DEBUG */
  65 #define err(format, arg...) printf("ERROR: " format "\n", ## arg)
  66 #undef SHOW_INFO
  67 #ifdef SHOW_INFO
  68 #define info(format, arg...) printf("INFO: " format "\n", ## arg)
  69 #else
  70 #define info(format, arg...) do {} while(0)
  71 #endif
  72
  73 #define m16_swap(x) swap_16(x)
  74 #define m32_swap(x) swap_32(x)
  75
  76 /* global ohci_t */
  77 static ohci_t gohci;
  78 /* this must be aligned to a 256 byte boundary */
  79 struct ohci_hcca ghcca[1];
  80 /* a pointer to the aligned storage */
  81 struct ohci_hcca *phcca;
  82 /* this allocates EDs for all possible endpoints */
  83 struct ohci_device ohci_dev;
  84 /* urb_priv */
  85 urb_priv_t urb_priv;
  86 /* RHSC flag */
  87 int got_rhsc;
  88 /* device which was disconnected */
  89 struct usb_device *devgone;
  90
  91 /*-------------------------------------------------------------------------*/
  92
  93 /* AMD-756 (D2 rev) reports corrupt register contents in some cases.
  94  * The erratum (#4) description is incorrect.  AMD's workaround waits
  95  * till some bits (mostly reserved) are clear; ok for all revs.
  96  */
  97 #define OHCI_QUIRK_AMD756 0xabcd
  98 #define read_roothub(hc, register, mask) ({ \
  99         u32 temp = readl (&hc->regs->roothub.register); \
 100         if (hc->flags & OHCI_QUIRK_AMD756) \
 101                 while (temp & mask) \
 102                         temp = readl (&hc->regs->roothub.register); \
 103         temp; })
 104
 105 static u32 roothub_a (struct ohci *hc)
 106         { return read_roothub (hc, a, 0xfc0fe000); }
 107 static inline u32 roothub_b (struct ohci *hc)
 108         { return readl (&hc->regs->roothub.b); }
 109 static inline u32 roothub_status (struct ohci *hc)
 110         { return readl (&hc->regs->roothub.status); }
 111 static u32 roothub_portstatus (struct ohci *hc, int i)
 112         { return read_roothub (hc, portstatus [i], 0xffe0fce0); }
 113
 114
 115 /* forward declaration */
 116 static int hc_interrupt (void);
 117 static void
 118 td_submit_job (struct usb_device * dev, unsigned long pipe, void * buffer,
 119         int transfer_len, struct devrequest * setup, urb_priv_t * urb, int interval);
 120
 121 /*-------------------------------------------------------------------------*
 122  * URB support functions
 123  *-------------------------------------------------------------------------*/
 124
 125 /* free HCD-private data associated with this URB */
 126
 127 static void urb_free_priv (urb_priv_t * urb)
 128 {
 129         int             i;
 130         int             last;
 131         struct td       * td;
 132
 133         last = urb->length - 1;
 134         if (last >= 0) {
 135                 for (i = 0; i <= last; i++) {
 136                         td = urb->td[i];
 137                         if (td) {
 138                                 td->usb_dev = NULL;
 139                                 urb->td[i] = NULL;
 140                         }
 141                 }
 142         }
 143 }
 144
 145 /*-------------------------------------------------------------------------*/
 146
 147 #ifdef DEBUG
 148 static int sohci_get_current_frame_number (struct usb_device * dev);
 149
 150 /* debug| print the main components of an URB
 151  * small: 0) header + data packets 1) just header */
 152
 153 static void pkt_print (struct usb_device * dev, unsigned long pipe, void * buffer,
 154         int transfer_len, struct devrequest * setup, char * str, int small)
 155 {
 156         urb_priv_t * purb = &urb_priv;
 157
 158         dbg("%s URB:[%4x] dev:%2d,ep:%2d-%c,type:%s,len:%d/%d stat:%#lx",
 159                         str,
 160                         sohci_get_current_frame_number (dev),
 161                         usb_pipedevice (pipe),
 162                         usb_pipeendpoint (pipe),
 163                         usb_pipeout (pipe)? 'O': 'I',
 164                         usb_pipetype (pipe) < 2? (usb_pipeint (pipe)? "INTR": "ISOC"):
 165                                 (usb_pipecontrol (pipe)? "CTRL": "BULK"),
 166                         purb->actual_length,
 167                         transfer_len, dev->status);
 168 #ifdef  OHCI_VERBOSE_DEBUG
 169         if (!small) {
 170                 int i, len;
 171
 172                 if (usb_pipecontrol (pipe)) {
 173                         printf (__FILE__ ": cmd(8):");
 174                         for (i = 0; i < 8 ; i++)
 175                                 printf (" %02x", ((__u8 *) setup) [i]);
 176                         printf ("\n");
 177                 }
 178                 if (transfer_len > 0 && buffer) {
 179                         printf (__FILE__ ": data(%d/%d):",
 180                                 purb->actual_length,
 181                                 transfer_len);
 182                         len = usb_pipeout (pipe)?
 183                                         transfer_len: purb->actual_length;
 184                         for (i = 0; i < 16 && i < len; i++)
 185                                 printf (" %02x", ((__u8 *) buffer) [i]);
 186                         printf ("%s\n", i < len? "...": "");
 187                 }
 188         }
 189 #endif
 190 }
 191
 192 /* just for debugging; prints non-empty branches of the int ed tree inclusive iso eds*/
 193 void ep_print_int_eds (ohci_t *ohci, char * str) {
 194         int i, j;
 195          __u32 * ed_p;
 196         for (i= 0; i < 32; i++) {
 197                 j = 5;
 198                 ed_p = &(ohci->hcca->int_table [i]);
 199                 if (*ed_p == 0)
 200                     continue;
 201                 printf (__FILE__ ": %s branch int %2d(%2x):", str, i, i);
 202                 while (*ed_p != 0 && j--) {
 203                         ed_t *ed = (ed_t *)m32_swap(ed_p);
 204                         printf (" ed: %4x;", ed->hwINFO);
 205                         ed_p = &ed->hwNextED;
 206                 }
 207                 printf ("\n");
 208         }
 209 }
 210
 211 static void ohci_dump_intr_mask (char *label, __u32 mask)
 212 {
 213         dbg ("%s: 0x%08x%s%s%s%s%s%s%s%s%s",
 214                 label,
 215                 mask,
 216                 (mask & OHCI_INTR_MIE) ? " MIE" : "",
 217                 (mask & OHCI_INTR_OC) ? " OC" : "",
 218                 (mask & OHCI_INTR_RHSC) ? " RHSC" : "",
 219                 (mask & OHCI_INTR_FNO) ? " FNO" : "",
 220                 (mask & OHCI_INTR_UE) ? " UE" : "",
 221                 (mask & OHCI_INTR_RD) ? " RD" : "",
 222                 (mask & OHCI_INTR_SF) ? " SF" : "",
 223                 (mask & OHCI_INTR_WDH) ? " WDH" : "",
 224                 (mask & OHCI_INTR_SO) ? " SO" : ""
 225                 );
 226 }
 227
 228 static void maybe_print_eds (char *label, __u32 value)
 229 {
 230         ed_t *edp = (ed_t *)value;
 231
 232         if (value) {
 233                 dbg ("%s %08x", label, value);
 234                 dbg ("%08x", edp->hwINFO);
 235                 dbg ("%08x", edp->hwTailP);
 236                 dbg ("%08x", edp->hwHeadP);
 237                 dbg ("%08x", edp->hwNextED);
 238         }
 239 }
 240
 241 static char * hcfs2string (int state)
 242 {
 243         switch (state) {
 244                 case OHCI_USB_RESET:    return "reset";
 245                 case OHCI_USB_RESUME:   return "resume";
 246                 case OHCI_USB_OPER:     return "operational";
 247                 case OHCI_USB_SUSPEND:  return "suspend";
 248         }
 249         return "?";
 250 }
 251
 252 /* dump control and status registers */
 253 static void ohci_dump_status (ohci_t *controller)
 254 {
 255         struct ohci_regs        *regs = controller->regs;
 256         __u32                   temp;
 257
 258         temp = readl (&regs->revision) & 0xff;
 259         if (temp != 0x10)
 260                 dbg ("spec %d.%d", (temp >> 4), (temp & 0x0f));
 261
 262         temp = readl (&regs->control);
 263         dbg ("control: 0x%08x%s%s%s HCFS=%s%s%s%s%s CBSR=%d", temp,
 264                 (temp & OHCI_CTRL_RWE) ? " RWE" : "",
 265                 (temp & OHCI_CTRL_RWC) ? " RWC" : "",
 266                 (temp & OHCI_CTRL_IR) ? " IR" : "",
 267                 hcfs2string (temp & OHCI_CTRL_HCFS),
 268                 (temp & OHCI_CTRL_BLE) ? " BLE" : "",
 269                 (temp & OHCI_CTRL_CLE) ? " CLE" : "",
 270                 (temp & OHCI_CTRL_IE) ? " IE" : "",
 271                 (temp & OHCI_CTRL_PLE) ? " PLE" : "",
 272                 temp & OHCI_CTRL_CBSR
 273                 );
 274
 275         temp = readl (&regs->cmdstatus);
 276         dbg ("cmdstatus: 0x%08x SOC=%d%s%s%s%s", temp,
 277                 (temp & OHCI_SOC) >> 16,
 278                 (temp & OHCI_OCR) ? " OCR" : "",
 279                 (temp & OHCI_BLF) ? " BLF" : "",
 280                 (temp & OHCI_CLF) ? " CLF" : "",
 281                 (temp & OHCI_HCR) ? " HCR" : ""
 282                 );
 283
 284         ohci_dump_intr_mask ("intrstatus", readl (&regs->intrstatus));
 285         ohci_dump_intr_mask ("intrenable", readl (&regs->intrenable));
 286
 287         maybe_print_eds ("ed_periodcurrent", readl (&regs->ed_periodcurrent));
 288
 289         maybe_print_eds ("ed_controlhead", readl (&regs->ed_controlhead));
 290         maybe_print_eds ("ed_controlcurrent", readl (&regs->ed_controlcurrent));
 291
 292         maybe_print_eds ("ed_bulkhead", readl (&regs->ed_bulkhead));
 293         maybe_print_eds ("ed_bulkcurrent", readl (&regs->ed_bulkcurrent));
 294
 295         maybe_print_eds ("donehead", readl (&regs->donehead));
 296 }
 297
 298 static void ohci_dump_roothub (ohci_t *controller, int verbose)
 299 {
 300         __u32                   temp, ndp, i;
 301
 302         temp = roothub_a (controller);
 303         ndp = (temp & RH_A_NDP);
 304
 305         if (verbose) {
 306                 dbg ("roothub.a: %08x POTPGT=%d%s%s%s%s%s NDP=%d", temp,
 307                         ((temp & RH_A_POTPGT) >> 24) & 0xff,
 308                         (temp & RH_A_NOCP) ? " NOCP" : "",
 309                         (temp & RH_A_OCPM) ? " OCPM" : "",
 310                         (temp & RH_A_DT) ? " DT" : "",
 311                         (temp & RH_A_NPS) ? " NPS" : "",
 312                         (temp & RH_A_PSM) ? " PSM" : "",
 313                         ndp
 314                         );
 315                 temp = roothub_b (controller);
 316                 dbg ("roothub.b: %08x PPCM=%04x DR=%04x",
 317                         temp,
 318                         (temp & RH_B_PPCM) >> 16,
 319                         (temp & RH_B_DR)
 320                         );
 321                 temp = roothub_status (controller);
 322                 dbg ("roothub.status: %08x%s%s%s%s%s%s",
 323                         temp,
 324                         (temp & RH_HS_CRWE) ? " CRWE" : "",
 325                         (temp & RH_HS_OCIC) ? " OCIC" : "",
 326                         (temp & RH_HS_LPSC) ? " LPSC" : "",
 327                         (temp & RH_HS_DRWE) ? " DRWE" : "",
 328                         (temp & RH_HS_OCI) ? " OCI" : "",
 329                         (temp & RH_HS_LPS) ? " LPS" : ""
 330                         );
 331         }
 332
 333         for (i = 0; i < ndp; i++) {
 334                 temp = roothub_portstatus (controller, i);
 335                 dbg ("roothub.portstatus [%d] = 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s",
 336                         i,
 337                         temp,
 338                         (temp & RH_PS_PRSC) ? " PRSC" : "",
 339                         (temp & RH_PS_OCIC) ? " OCIC" : "",
 340                         (temp & RH_PS_PSSC) ? " PSSC" : "",
 341                         (temp & RH_PS_PESC) ? " PESC" : "",
 342                         (temp & RH_PS_CSC) ? " CSC" : "",
 343
 344                         (temp & RH_PS_LSDA) ? " LSDA" : "",
 345                         (temp & RH_PS_PPS) ? " PPS" : "",
 346                         (temp & RH_PS_PRS) ? " PRS" : "",
 347                         (temp & RH_PS_POCI) ? " POCI" : "",
 348                         (temp & RH_PS_PSS) ? " PSS" : "",
 349
 350                         (temp & RH_PS_PES) ? " PES" : "",
 351                         (temp & RH_PS_CCS) ? " CCS" : ""
 352                         );
 353         }
 354 }
 355
 356 static void ohci_dump (ohci_t *controller, int verbose)
 357 {
 358         dbg ("OHCI controller usb-%s state", controller->slot_name);
 359
 360         /* dumps some of the state we know about */
 361         ohci_dump_status (controller);
 362         if (verbose)
 363                 ep_print_int_eds (controller, "hcca");
 364         dbg ("hcca frame #%04x", controller->hcca->frame_no);
 365         ohci_dump_roothub (controller, 1);
 366 }
 367
 368
 369 #endif /* DEBUG */
 370
 371 /*-------------------------------------------------------------------------*
 372  * Interface functions (URB)
 373  *-------------------------------------------------------------------------*/
 374
 375 /* get a transfer request */
 376
 377 int sohci_submit_job(struct usb_device *dev, unsigned long pipe, void *buffer,
 378                 int transfer_len, struct devrequest *setup, int interval)
 379 {
 380         ohci_t *ohci;
 381         ed_t * ed;
 382         urb_priv_t *purb_priv;
 383         int i, size = 0;
 384
 385         ohci = &gohci;
 386
 387         /* when controller's hung, permit only roothub cleanup attempts
 388          * such as powering down ports */
 389         if (ohci->disabled) {
 390                 err("sohci_submit_job: EPIPE");
 391                 return -1;
 392         }
 393
 394         /* every endpoint has a ed, locate and fill it */
 395         if (!(ed = ep_add_ed (dev, pipe))) {
 396                 err("sohci_submit_job: ENOMEM");
 397                 return -1;
 398         }
 399
 400         /* for the private part of the URB we need the number of TDs (size) */
 401         switch (usb_pipetype (pipe)) {
 402                 case PIPE_BULK: /* one TD for every 4096 Byte */
 403                         size = (transfer_len - 1) / 4096 + 1;
 404                         break;
 405                 case PIPE_CONTROL: /* 1 TD for setup, 1 for ACK and 1 for every 4096 B */
 406                         size = (transfer_len == 0)? 2:
 407                                                 (transfer_len - 1) / 4096 + 3;
 408                         break;
 409         }
 410
 411         if (size >= (N_URB_TD - 1)) {
 412                 err("need %d TDs, only have %d", size, N_URB_TD);
 413                 return -1;
 414         }
 415         purb_priv = &urb_priv;
 416         purb_priv->pipe = pipe;
 417
 418         /* fill the private part of the URB */
 419         purb_priv->length = size;
 420         purb_priv->ed = ed;
 421         purb_priv->actual_length = 0;
 422
 423         /* allocate the TDs */
 424         /* note that td[0] was allocated in ep_add_ed */
 425         for (i = 0; i < size; i++) {
 426                 purb_priv->td[i] = td_alloc (dev);
 427                 if (!purb_priv->td[i]) {
 428                         purb_priv->length = i;
 429                         urb_free_priv (purb_priv);
 430                         err("sohci_submit_job: ENOMEM");
 431                         return -1;
 432                 }
 433         }
 434
 435         if (ed->state == ED_NEW || (ed->state & ED_DEL)) {
 436                 urb_free_priv (purb_priv);
 437                 err("sohci_submit_job: EINVAL");
 438                 return -1;
 439         }
 440
 441         /* link the ed into a chain if is not already */
 442         if (ed->state != ED_OPER)
 443                 ep_link (ohci, ed);
 444
 445         /* fill the TDs and link it to the ed */
 446         td_submit_job(dev, pipe, buffer, transfer_len, setup, purb_priv, interval);
 447
 448         return 0;
 449 }
 450
 451 /*-------------------------------------------------------------------------*/
 452
 453 #ifdef DEBUG
 454 /* tell us the current USB frame number */
 455
 456 static int sohci_get_current_frame_number (struct usb_device *usb_dev)
 457 {
 458         ohci_t *ohci = &gohci;
 459
 460         return m16_swap (ohci->hcca->frame_no);
 461 }
 462 #endif
 463
 464 /*-------------------------------------------------------------------------*
 465  * ED handling functions
 466  *-------------------------------------------------------------------------*/
 467
 468 /* link an ed into one of the HC chains */
 469
 470 static int ep_link (ohci_t *ohci, ed_t *edi)
 471 {
 472         volatile ed_t *ed = edi;
 473
 474         ed->state = ED_OPER;
 475
 476         switch (ed->type) {
 477         case PIPE_CONTROL:
 478                 ed->hwNextED = 0;
 479                 if (ohci->ed_controltail == NULL) {
 480                         writel (ed, &ohci->regs->ed_controlhead);
 481                 } else {
 482                         ohci->ed_controltail->hwNextED = m32_swap (ed);
 483                 }
 484                 ed->ed_prev = ohci->ed_controltail;
 485                 if (!ohci->ed_controltail && !ohci->ed_rm_list[0] &&
 486                         !ohci->ed_rm_list[1] && !ohci->sleeping) {
 487                         ohci->hc_control |= OHCI_CTRL_CLE;
 488                         writel (ohci->hc_control, &ohci->regs->control);
 489                 }
 490                 ohci->ed_controltail = edi;
 491                 break;
 492
 493         case PIPE_BULK:
 494                 ed->hwNextED = 0;
 495                 if (ohci->ed_bulktail == NULL) {
 496                         writel (ed, &ohci->regs->ed_bulkhead);
 497                 } else {
 498                         ohci->ed_bulktail->hwNextED = m32_swap (ed);
 499                 }
 500                 ed->ed_prev = ohci->ed_bulktail;
 501                 if (!ohci->ed_bulktail && !ohci->ed_rm_list[0] &&
 502                         !ohci->ed_rm_list[1] && !ohci->sleeping) {
 503                         ohci->hc_control |= OHCI_CTRL_BLE;
 504                         writel (ohci->hc_control, &ohci->regs->control);
 505                 }
 506                 ohci->ed_bulktail = edi;
 507                 break;
 508         }
 509         return 0;
 510 }
 511
 512 /*-------------------------------------------------------------------------*/
 513
 514 /* unlink an ed from one of the HC chains.
 515  * just the link to the ed is unlinked.
 516  * the link from the ed still points to another operational ed or 0
 517  * so the HC can eventually finish the processing of the unlinked ed */
 518
 519 static int ep_unlink (ohci_t *ohci, ed_t *ed)
 520 {
 521         ed->hwINFO |= m32_swap (OHCI_ED_SKIP);
 522
 523         switch (ed->type) {
 524         case PIPE_CONTROL:
 525                 if (ed->ed_prev == NULL) {
 526                         if (!ed->hwNextED) {
 527                                 ohci->hc_control &= ~OHCI_CTRL_CLE;
 528                                 writel (ohci->hc_control, &ohci->regs->control);
 529                         }
 530                         writel (m32_swap (*((__u32 *)&ed->hwNextED)), &ohci->regs->ed_controlhead);
 531                 } else {
 532                         ed->ed_prev->hwNextED = ed->hwNextED;
 533                 }
 534                 if (ohci->ed_controltail == ed) {
 535                         ohci->ed_controltail = ed->ed_prev;
 536                 } else {
 537                         ((ed_t *)m32_swap (*((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
 538                 }
 539                 break;
 540
 541         case PIPE_BULK:
 542                 if (ed->ed_prev == NULL) {
 543                         if (!ed->hwNextED) {
 544                                 ohci->hc_control &= ~OHCI_CTRL_BLE;
 545                                 writel (ohci->hc_control, &ohci->regs->control);
 546                         }
 547                         writel (m32_swap (*((__u32 *)&ed->hwNextED)), &ohci->regs->ed_bulkhead);
 548                 } else {
 549                         ed->ed_prev->hwNextED = ed->hwNextED;
 550                 }
 551                 if (ohci->ed_bulktail == ed) {
 552                         ohci->ed_bulktail = ed->ed_prev;
 553                 } else {
 554                         ((ed_t *)m32_swap (*((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
 555                 }
 556                 break;
 557         }
 558         ed->state = ED_UNLINK;
 559         return 0;
 560 }
 561
 562
 563 /*-------------------------------------------------------------------------*/
 564
 565 /* add/reinit an endpoint; this should be done once at the usb_set_configuration command,
 566  * but the USB stack is a little bit stateless  so we do it at every transaction
 567  * if the state of the ed is ED_NEW then a dummy td is added and the state is changed to ED_UNLINK
 568  * in all other cases the state is left unchanged
 569  * the ed info fields are setted anyway even though most of them should not change */
 570
 571 static ed_t * ep_add_ed (struct usb_device *usb_dev, unsigned long pipe)
 572 {
 573         td_t *td;
 574         ed_t *ed_ret;
 575         volatile ed_t *ed;
 576
 577         ed = ed_ret = &ohci_dev.ed[(usb_pipeendpoint (pipe) << 1) |
 578                         (usb_pipecontrol (pipe)? 0: usb_pipeout (pipe))];
 579
 580         if ((ed->state & ED_DEL) || (ed->state & ED_URB_DEL)) {
 581                 err("ep_add_ed: pending delete");
 582                 /* pending delete request */
 583                 return NULL;
 584         }
 585
 586         if (ed->state == ED_NEW) {
 587                 ed->hwINFO = m32_swap (OHCI_ED_SKIP); /* skip ed */
 588                 /* dummy td; end of td list for ed */
 589                 td = td_alloc (usb_dev);
 590                 ed->hwTailP = m32_swap (td);
 591                 ed->hwHeadP = ed->hwTailP;
 592                 ed->state = ED_UNLINK;
 593                 ed->type = usb_pipetype (pipe);
 594                 ohci_dev.ed_cnt++;
 595         }
 596
 597         ed->hwINFO = m32_swap (usb_pipedevice (pipe)
 598                         | usb_pipeendpoint (pipe) << 7
 599                         | (usb_pipeisoc (pipe)? 0x8000: 0)
 600                         | (usb_pipecontrol (pipe)? 0: (usb_pipeout (pipe)? 0x800: 0x1000))
 601                         | usb_pipeslow (pipe) << 13
 602                         | usb_maxpacket (usb_dev, pipe) << 16);
 603
 604         return ed_ret;
 605 }
 606
 607 /*-------------------------------------------------------------------------*
 608  * TD handling functions
 609  *-------------------------------------------------------------------------*/
 610
 611 /* enqueue next TD for this URB (OHCI spec 5.2.8.2) */
 612
 613 static void td_fill (ohci_t *ohci, unsigned int info,
 614         void *data, int len,
 615         struct usb_device *dev, int index, urb_priv_t *urb_priv)
 616 {
 617         volatile td_t  *td, *td_pt;
 618 #ifdef OHCI_FILL_TRACE
 619         int i;
 620 #endif
 621
 622         if (index > urb_priv->length) {
 623                 err("index > length");
 624                 return;
 625         }
 626         /* use this td as the next dummy */
 627         td_pt = urb_priv->td [index];
 628         td_pt->hwNextTD = 0;
 629
 630         /* fill the old dummy TD */
 631         td = urb_priv->td [index] = (td_t *)(m32_swap (urb_priv->ed->hwTailP) & ~0xf);
 632
 633         td->ed = urb_priv->ed;
 634         td->next_dl_td = NULL;
 635         td->index = index;
 636         td->data = (__u32)data;
 637 #ifdef OHCI_FILL_TRACE
 638         if ((usb_pipetype(urb_priv->pipe) == PIPE_BULK) && usb_pipeout(urb_priv->pipe)) {
 639                 for (i = 0; i < len; i++)
 640                 printf("td->data[%d] %#2x ",i, ((unsigned char *)td->data)[i]);
 641                 printf("\n");
 642         }
 643 #endif
 644         if (!len)
 645                 data = 0;
 646
 647         td->hwINFO = m32_swap (info);
 648         td->hwCBP = m32_swap (data);
 649         if (data)
 650                 td->hwBE = m32_swap (data + len - 1);
 651         else
 652                 td->hwBE = 0;
 653         td->hwNextTD = m32_swap (td_pt);
 654         td->hwPSW [0] = m16_swap (((__u32)data & 0x0FFF) | 0xE000);
 655
 656         /* append to queue */
 657         td->ed->hwTailP = td->hwNextTD;
 658 }
 659
 660 /*-------------------------------------------------------------------------*/
 661
 662 /* prepare all TDs of a transfer */
 663
 664 static void td_submit_job (struct usb_device *dev, unsigned long pipe, void *buffer,
 665         int transfer_len, struct devrequest *setup, urb_priv_t *urb, int interval)
 666 {
 667         ohci_t *ohci = &gohci;
 668         int data_len = transfer_len;
 669         void *data;
 670         int cnt = 0;
 671         __u32 info = 0;
 672         unsigned int toggle = 0;
 673
 674         /* OHCI handles the DATA-toggles itself, we just use the USB-toggle bits for reseting */
 675         if(usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe))) {
 676                 toggle = TD_T_TOGGLE;
 677         } else {
 678                 toggle = TD_T_DATA0;
 679                 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 1);
 680         }
 681         urb->td_cnt = 0;
 682         if (data_len)
 683                 data = buffer;
 684         else
 685                 data = 0;
 686
 687         switch (usb_pipetype (pipe)) {
 688         case PIPE_BULK:
 689                 info = usb_pipeout (pipe)?
 690                         TD_CC | TD_DP_OUT : TD_CC | TD_DP_IN ;
 691                 while(data_len > 4096) {
 692                         td_fill (ohci, info | (cnt? TD_T_TOGGLE:toggle), data, 4096, dev, cnt, urb);
 693                         data += 4096; data_len -= 4096; cnt++;
 694                 }
 695                 info = usb_pipeout (pipe)?
 696                         TD_CC | TD_DP_OUT : TD_CC | TD_R | TD_DP_IN ;
 697                 td_fill (ohci, info | (cnt? TD_T_TOGGLE:toggle), data, data_len, dev, cnt, urb);
 698                 cnt++;
 699
 700                 if (!ohci->sleeping)
 701                         writel (OHCI_BLF, &ohci->regs->cmdstatus); /* start bulk list */
 702                 break;
 703
 704         case PIPE_CONTROL:
 705                 info = TD_CC | TD_DP_SETUP | TD_T_DATA0;
 706                 td_fill (ohci, info, setup, 8, dev, cnt++, urb);
 707                 if (data_len > 0) {
 708                         info = usb_pipeout (pipe)?
 709                                 TD_CC | TD_R | TD_DP_OUT | TD_T_DATA1 : TD_CC | TD_R | TD_DP_IN | TD_T_DATA1;
 710                         /* NOTE:  mishandles transfers >8K, some >4K */
 711                         td_fill (ohci, info, data, data_len, dev, cnt++, urb);
 712                 }
 713                 info = usb_pipeout (pipe)?
 714                         TD_CC | TD_DP_IN | TD_T_DATA1: TD_CC | TD_DP_OUT | TD_T_DATA1;
 715                 td_fill (ohci, info, data, 0, dev, cnt++, urb);
 716                 if (!ohci->sleeping)
 717                         writel (OHCI_CLF, &ohci->regs->cmdstatus); /* start Control list */
 718                 break;
 719         }
 720         if (urb->length != cnt)
 721                 dbg("TD LENGTH %d != CNT %d", urb->length, cnt);
 722 }
 723
 724 /*-------------------------------------------------------------------------*
 725  * Done List handling functions
 726  *-------------------------------------------------------------------------*/
 727
 728
 729 /* calculate the transfer length and update the urb */
 730
 731 static void dl_transfer_length(td_t * td)
 732 {
 733         __u32 tdINFO, tdBE, tdCBP;
 734         urb_priv_t *lurb_priv = &urb_priv;
 735
 736         tdINFO = m32_swap (td->hwINFO);
 737         tdBE   = m32_swap (td->hwBE);
 738         tdCBP  = m32_swap (td->hwCBP);
 739
 740
 741         if (!(usb_pipetype (lurb_priv->pipe) == PIPE_CONTROL &&
 742             ((td->index == 0) || (td->index == lurb_priv->length - 1)))) {
 743                 if (tdBE != 0) {
 744                         if (td->hwCBP == 0)
 745                                 lurb_priv->actual_length += tdBE - td->data + 1;
 746                         else
 747                                 lurb_priv->actual_length += tdCBP - td->data;
 748                 }
 749         }
 750 }
 751
 752 /*-------------------------------------------------------------------------*/
 753
 754 /* replies to the request have to be on a FIFO basis so
 755  * we reverse the reversed done-list */
 756
 757 static td_t * dl_reverse_done_list (ohci_t *ohci)
 758 {
 759         __u32 td_list_hc;
 760         td_t *td_rev = NULL;
 761         td_t *td_list = NULL;
 762         urb_priv_t *lurb_priv = NULL;
 763
 764         td_list_hc = m32_swap (ohci->hcca->done_head) & 0xfffffff0;
 765         ohci->hcca->done_head = 0;
 766
 767         while (td_list_hc) {
 768                 td_list = (td_t *)td_list_hc;
 769
 770                 if (TD_CC_GET (m32_swap (td_list->hwINFO))) {
 771                         lurb_priv = &urb_priv;
 772                         dbg(" USB-error/status: %x : %p",
 773                                         TD_CC_GET (m32_swap (td_list->hwINFO)), td_list);
 774                         if (td_list->ed->hwHeadP & m32_swap (0x1)) {
 775                                 if (lurb_priv && ((td_list->index + 1) < lurb_priv->length)) {
 776                                         td_list->ed->hwHeadP =
 777                                                 (lurb_priv->td[lurb_priv->length - 1]->hwNextTD & m32_swap (0xfffffff0)) |
 778                                                                         (td_list->ed->hwHeadP & m32_swap (0x2));
 779                                         lurb_priv->td_cnt += lurb_priv->length - td_list->index - 1;
 780                                 } else
 781                                         td_list->ed->hwHeadP &= m32_swap (0xfffffff2);
 782                         }
 783                 }
 784
 785                 td_list->next_dl_td = td_rev;
 786                 td_rev = td_list;
 787                 td_list_hc = m32_swap (td_list->hwNextTD) & 0xfffffff0;
 788         }
 789         return td_list;
 790 }
 791
 792 /*-------------------------------------------------------------------------*/
 793
 794 /* td done list */
 795 static int dl_done_list (ohci_t *ohci, td_t *td_list)
 796 {
 797         td_t *td_list_next = NULL;
 798         ed_t *ed;
 799         int cc = 0;
 800         int stat = 0;
 801         /* urb_t *urb; */
 802         urb_priv_t *lurb_priv;
 803         __u32 tdINFO, edHeadP, edTailP;
 804
 805         while (td_list) {
 806                 td_list_next = td_list->next_dl_td;
 807
 808                 lurb_priv = &urb_priv;
 809                 tdINFO = m32_swap (td_list->hwINFO);
 810
 811                 ed = td_list->ed;
 812
 813                 dl_transfer_length(td_list);
 814
 815                 /* error code of transfer */
 816                 cc = TD_CC_GET (tdINFO);
 817                 if (cc != 0) {
 818                         dbg("ConditionCode %#x", cc);
 819                         stat = cc_to_error[cc];
 820                 }
 821
 822                 if (ed->state != ED_NEW) {
 823                         edHeadP = m32_swap (ed->hwHeadP) & 0xfffffff0;
 824                         edTailP = m32_swap (ed->hwTailP);
 825
 826                         /* unlink eds if they are not busy */
 827                         if ((edHeadP == edTailP) && (ed->state == ED_OPER))
 828                                 ep_unlink (ohci, ed);
 829                 }
 830
 831                 td_list = td_list_next;
 832         }
 833         return stat;
 834 }
 835
 836 /*-------------------------------------------------------------------------*
 837  * Virtual Root Hub
 838  *-------------------------------------------------------------------------*/
 839
 840 /* Device descriptor */
 841 static __u8 root_hub_dev_des[] =
 842 {
 843         0x12,       /*  __u8  bLength; */
 844         0x01,       /*  __u8  bDescriptorType; Device */
 845         0x10,       /*  __u16 bcdUSB; v1.1 */
 846         0x01,
 847         0x09,       /*  __u8  bDeviceClass; HUB_CLASSCODE */
 848         0x00,       /*  __u8  bDeviceSubClass; */
 849         0x00,       /*  __u8  bDeviceProtocol; */
 850         0x08,       /*  __u8  bMaxPacketSize0; 8 Bytes */
 851         0x00,       /*  __u16 idVendor; */
 852         0x00,
 853         0x00,       /*  __u16 idProduct; */
 854         0x00,
 855         0x00,       /*  __u16 bcdDevice; */
 856         0x00,
 857         0x00,       /*  __u8  iManufacturer; */
 858         0x01,       /*  __u8  iProduct; */
 859         0x00,       /*  __u8  iSerialNumber; */
 860         0x01        /*  __u8  bNumConfigurations; */
 861 };
 862
 863
 864 /* Configuration descriptor */
 865 static __u8 root_hub_config_des[] =
 866 {
 867         0x09,       /*  __u8  bLength; */
 868         0x02,       /*  __u8  bDescriptorType; Configuration */
 869         0x19,       /*  __u16 wTotalLength; */
 870         0x00,
 871         0x01,       /*  __u8  bNumInterfaces; */
 872         0x01,       /*  __u8  bConfigurationValue; */
 873         0x00,       /*  __u8  iConfiguration; */
 874         0x40,       /*  __u8  bmAttributes;
 875                  Bit 7: Bus-powered, 6: Self-powered, 5 Remote-wakwup, 4..0: resvd */
 876         0x00,       /*  __u8  MaxPower; */
 877
 878         /* interface */
 879         0x09,       /*  __u8  if_bLength; */
 880         0x04,       /*  __u8  if_bDescriptorType; Interface */
 881         0x00,       /*  __u8  if_bInterfaceNumber; */
 882         0x00,       /*  __u8  if_bAlternateSetting; */
 883         0x01,       /*  __u8  if_bNumEndpoints; */
 884         0x09,       /*  __u8  if_bInterfaceClass; HUB_CLASSCODE */
 885         0x00,       /*  __u8  if_bInterfaceSubClass; */
 886         0x00,       /*  __u8  if_bInterfaceProtocol; */
 887         0x00,       /*  __u8  if_iInterface; */
 888
 889         /* endpoint */
 890         0x07,       /*  __u8  ep_bLength; */
 891         0x05,       /*  __u8  ep_bDescriptorType; Endpoint */
 892         0x81,       /*  __u8  ep_bEndpointAddress; IN Endpoint 1 */
 893         0x03,       /*  __u8  ep_bmAttributes; Interrupt */
 894         0x02,       /*  __u16 ep_wMaxPacketSize; ((MAX_ROOT_PORTS + 1) / 8 */
 895         0x00,
 896         0xff        /*  __u8  ep_bInterval; 255 ms */
 897 };
 898
 899 static unsigned char root_hub_str_index0[] =
 900 {
 901         0x04,                   /*  __u8  bLength; */
 902         0x03,                   /*  __u8  bDescriptorType; String-descriptor */
 903         0x09,                   /*  __u8  lang ID */
 904         0x04,                   /*  __u8  lang ID */
 905 };
 906
 907 static unsigned char root_hub_str_index1[] =
 908 {
 909         28,                     /*  __u8  bLength; */
 910         0x03,                   /*  __u8  bDescriptorType; String-descriptor */
 911         'O',                    /*  __u8  Unicode */
 912         0,                              /*  __u8  Unicode */
 913         'H',                    /*  __u8  Unicode */
 914         0,                              /*  __u8  Unicode */
 915         'C',                    /*  __u8  Unicode */
 916         0,                              /*  __u8  Unicode */
 917         'I',                    /*  __u8  Unicode */
 918         0,                              /*  __u8  Unicode */
 919         ' ',                    /*  __u8  Unicode */
 920         0,                              /*  __u8  Unicode */
 921         'R',                    /*  __u8  Unicode */
 922         0,                              /*  __u8  Unicode */
 923         'o',                    /*  __u8  Unicode */
 924         0,                              /*  __u8  Unicode */
 925         'o',                    /*  __u8  Unicode */
 926         0,                              /*  __u8  Unicode */
 927         't',                    /*  __u8  Unicode */
 928         0,                              /*  __u8  Unicode */
 929         ' ',                    /*  __u8  Unicode */
 930         0,                              /*  __u8  Unicode */
 931         'H',                    /*  __u8  Unicode */
 932         0,                              /*  __u8  Unicode */
 933         'u',                    /*  __u8  Unicode */
 934         0,                              /*  __u8  Unicode */
 935         'b',                    /*  __u8  Unicode */
 936         0,                              /*  __u8  Unicode */
 937 };
 938
 939 /* Hub class-specific descriptor is constructed dynamically */
 940
 941
 942 /*-------------------------------------------------------------------------*/
 943
 944 #define OK(x)                   len = (x); break
 945 #ifdef DEBUG
 946 #define WR_RH_STAT(x)           {info("WR:status %#8x", (x));writel((x), &gohci.regs->roothub.status);}
 947 #define WR_RH_PORTSTAT(x)       {info("WR:portstatus[%d] %#8x", wIndex-1, (x));writel((x), &gohci.regs->roothub.portstatus[wIndex-1]);}
 948 #else
 949 #define WR_RH_STAT(x)           writel((x), &gohci.regs->roothub.status)
 950 #define WR_RH_PORTSTAT(x)       writel((x), &gohci.regs->roothub.portstatus[wIndex-1])
 951 #endif
 952 #define RD_RH_STAT              roothub_status(&gohci)
 953 #define RD_RH_PORTSTAT          roothub_portstatus(&gohci,wIndex-1)
 954
 955 /* request to virtual root hub */
 956
 957 int rh_check_port_status(ohci_t *controller)
 958 {
 959         __u32 temp, ndp, i;
 960         int res;
 961
 962         res = -1;
 963         temp = roothub_a (controller);
 964         ndp = (temp & RH_A_NDP);
 965         for (i = 0; i < ndp; i++) {
 966                 temp = roothub_portstatus (controller, i);
 967                 /* check for a device disconnect */
 968                 if (((temp & (RH_PS_PESC | RH_PS_CSC)) ==
 969                         (RH_PS_PESC | RH_PS_CSC)) &&
 970                         ((temp & RH_PS_CCS) == 0)) {
 971                         res = i;
 972                         break;
 973                 }
 974         }
 975         return res;
 976 }
 977
 978 static int ohci_submit_rh_msg(struct usb_device *dev, unsigned long pipe,
 979                 void *buffer, int transfer_len, struct devrequest *cmd)
 980 {
 981         void * data = buffer;
 982         int leni = transfer_len;
 983         int len = 0;
 984         int stat = 0;
 985         __u32 datab[4];
 986         __u8 *data_buf = (__u8 *)datab;
 987         __u16 bmRType_bReq;
 988         __u16 wValue;
 989         __u16 wIndex;
 990         __u16 wLength;
 991
 992 #ifdef DEBUG
 993 urb_priv.actual_length = 0;
 994 pkt_print(dev, pipe, buffer, transfer_len, cmd, "SUB(rh)", usb_pipein(pipe));
 995 #else
 996         wait_ms(1);
 997 #endif
 998         if ((pipe & PIPE_INTERRUPT) == PIPE_INTERRUPT) {
 999                 info("Root-Hub submit IRQ: NOT implemented");
1000                 return 0;
1001         }
1002
1003         bmRType_bReq  = cmd->requesttype | (cmd->request << 8);
1004         wValue        = m16_swap (cmd->value);
1005         wIndex        = m16_swap (cmd->index);
1006         wLength       = m16_swap (cmd->length);
1007
1008         info("Root-Hub: adr: %2x cmd(%1x): %08x %04x %04x %04x",
1009                 dev->devnum, 8, bmRType_bReq, wValue, wIndex, wLength);
1010
1011         switch (bmRType_bReq) {
1012         /* Request Destination:
1013            without flags: Device,
1014            RH_INTERFACE: interface,
1015            RH_ENDPOINT: endpoint,
1016            RH_CLASS means HUB here,
1017            RH_OTHER | RH_CLASS  almost ever means HUB_PORT here
1018         */
1019
1020         case RH_GET_STATUS:
1021                         *(__u16 *) data_buf = m16_swap (1); OK (2);
1022         case RH_GET_STATUS | RH_INTERFACE:
1023                         *(__u16 *) data_buf = m16_swap (0); OK (2);
1024         case RH_GET_STATUS | RH_ENDPOINT:
1025                         *(__u16 *) data_buf = m16_swap (0); OK (2);
1026         case RH_GET_STATUS | RH_CLASS:
1027                         *(__u32 *) data_buf = m32_swap (
1028                                 RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE));
1029                         OK (4);
1030         case RH_GET_STATUS | RH_OTHER | RH_CLASS:
1031                         *(__u32 *) data_buf = m32_swap (RD_RH_PORTSTAT); OK (4);
1032
1033         case RH_CLEAR_FEATURE | RH_ENDPOINT:
1034                 switch (wValue) {
1035                         case (RH_ENDPOINT_STALL): OK (0);
1036                 }
1037                 break;
1038
1039         case RH_CLEAR_FEATURE | RH_CLASS:
1040                 switch (wValue) {
1041                         case RH_C_HUB_LOCAL_POWER:
1042                                 OK(0);
1043                         case (RH_C_HUB_OVER_CURRENT):
1044                                         WR_RH_STAT(RH_HS_OCIC); OK (0);
1045                 }
1046                 break;
1047
1048         case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
1049                 switch (wValue) {
1050                         case (RH_PORT_ENABLE):
1051                                         WR_RH_PORTSTAT (RH_PS_CCS ); OK (0);
1052                         case (RH_PORT_SUSPEND):
1053                                         WR_RH_PORTSTAT (RH_PS_POCI); OK (0);
1054                         case (RH_PORT_POWER):
1055                                         WR_RH_PORTSTAT (RH_PS_LSDA); OK (0);
1056                         case (RH_C_PORT_CONNECTION):
1057                                         WR_RH_PORTSTAT (RH_PS_CSC ); OK (0);
1058                         case (RH_C_PORT_ENABLE):
1059                                         WR_RH_PORTSTAT (RH_PS_PESC); OK (0);
1060                         case (RH_C_PORT_SUSPEND):
1061                                         WR_RH_PORTSTAT (RH_PS_PSSC); OK (0);
1062                         case (RH_C_PORT_OVER_CURRENT):
1063                                         WR_RH_PORTSTAT (RH_PS_OCIC); OK (0);
1064                         case (RH_C_PORT_RESET):
1065                                         WR_RH_PORTSTAT (RH_PS_PRSC); OK (0);
1066                 }
1067                 break;
1068
1069         case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
1070                 switch (wValue) {
1071                         case (RH_PORT_SUSPEND):
1072                                         WR_RH_PORTSTAT (RH_PS_PSS ); OK (0);
1073                         case (RH_PORT_RESET): /* BUG IN HUP CODE *********/
1074                                         if (RD_RH_PORTSTAT & RH_PS_CCS)
1075                                             WR_RH_PORTSTAT (RH_PS_PRS);
1076                                         OK (0);
1077                         case (RH_PORT_POWER):
1078                                         WR_RH_PORTSTAT (RH_PS_PPS ); OK (0);
1079                         case (RH_PORT_ENABLE): /* BUG IN HUP CODE *********/
1080                                         if (RD_RH_PORTSTAT & RH_PS_CCS)
1081                                             WR_RH_PORTSTAT (RH_PS_PES );
1082                                         OK (0);
1083                 }
1084                 break;
1085
1086         case RH_SET_ADDRESS: gohci.rh.devnum = wValue; OK(0);
1087
1088         case RH_GET_DESCRIPTOR:
1089                 switch ((wValue & 0xff00) >> 8) {
1090                         case (0x01): /* device descriptor */
1091                                 len = min_t(unsigned int,
1092                                           leni,
1093                                           min_t(unsigned int,
1094                                               sizeof (root_hub_dev_des),
1095                                               wLength));
1096                                 data_buf = root_hub_dev_des; OK(len);
1097                         case (0x02): /* configuration descriptor */
1098                                 len = min_t(unsigned int,
1099                                           leni,
1100                                           min_t(unsigned int,
1101                                               sizeof (root_hub_config_des),
1102                                               wLength));
1103                                 data_buf = root_hub_config_des; OK(len);
1104                         case (0x03): /* string descriptors */
1105                                 if(wValue==0x0300) {
1106                                         len = min_t(unsigned int,
1107                                                   leni,
1108                                                   min_t(unsigned int,
1109                                                       sizeof (root_hub_str_index0),
1110                                                       wLength));
1111                                         data_buf = root_hub_str_index0;
1112                                         OK(len);
1113                                 }
1114                                 if(wValue==0x0301) {
1115                                         len = min_t(unsigned int,
1116                                                   leni,
1117                                                   min_t(unsigned int,
1118                                                       sizeof (root_hub_str_index1),
1119                                                       wLength));
1120                                         data_buf = root_hub_str_index1;
1121                                         OK(len);
1122                         }
1123                         default:
1124                                 stat = USB_ST_STALLED;
1125                 }
1126                 break;
1127
1128         case RH_GET_DESCRIPTOR | RH_CLASS:
1129             {
1130                     __u32 temp = roothub_a (&gohci);
1131
1132                     data_buf [0] = 9;           /* min length; */
1133                     data_buf [1] = 0x29;
1134                     data_buf [2] = temp & RH_A_NDP;
1135                     data_buf [3] = 0;
1136                     if (temp & RH_A_PSM)        /* per-port power switching? */
1137                         data_buf [3] |= 0x1;
1138                     if (temp & RH_A_NOCP)       /* no overcurrent reporting? */
1139                         data_buf [3] |= 0x10;
1140                     else if (temp & RH_A_OCPM)  /* per-port overcurrent reporting? */
1141                         data_buf [3] |= 0x8;
1142
1143                     /* corresponds to data_buf[4-7] */
1144                     datab [1] = 0;
1145                     data_buf [5] = (temp & RH_A_POTPGT) >> 24;
1146                     temp = roothub_b (&gohci);
1147                     data_buf [7] = temp & RH_B_DR;
1148                     if (data_buf [2] < 7) {
1149                         data_buf [8] = 0xff;
1150                     } else {
1151                         data_buf [0] += 2;
1152                         data_buf [8] = (temp & RH_B_DR) >> 8;
1153                         data_buf [10] = data_buf [9] = 0xff;
1154                     }
1155
1156                     len = min_t(unsigned int, leni,
1157                               min_t(unsigned int, data_buf [0], wLength));
1158                     OK (len);
1159                 }
1160
1161         case RH_GET_CONFIGURATION:      *(__u8 *) data_buf = 0x01; OK (1);
1162
1163         case RH_SET_CONFIGURATION:      WR_RH_STAT (0x10000); OK (0);
1164
1165         default:
1166                 dbg ("unsupported root hub command");
1167                 stat = USB_ST_STALLED;
1168         }
1169
1170 #ifdef  DEBUG
1171         ohci_dump_roothub (&gohci, 1);
1172 #else
1173         wait_ms(1);
1174 #endif
1175
1176         len = min_t(int, len, leni);
1177         if (data != data_buf)
1178             memcpy (data, data_buf, len);
1179         dev->act_len = len;
1180         dev->status = stat;
1181
1182 #ifdef DEBUG
1183         if (transfer_len)
1184                 urb_priv.actual_length = transfer_len;
1185         pkt_print(dev, pipe, buffer, transfer_len, cmd, "RET(rh)", 0/*usb_pipein(pipe)*/);
1186 #else
1187         wait_ms(1);
1188 #endif
1189
1190         return stat;
1191 }
1192
1193 /*-------------------------------------------------------------------------*/
1194
1195 /* common code for handling submit messages - used for all but root hub */
1196 /* accesses. */
1197 int submit_common_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1198                 int transfer_len, struct devrequest *setup, int interval)
1199 {
1200         int stat = 0;
1201         int maxsize = usb_maxpacket(dev, pipe);
1202         int timeout;
1203
1204         /* device pulled? Shortcut the action. */
1205         if (devgone == dev) {
1206                 dev->status = USB_ST_CRC_ERR;
1207                 return 0;
1208         }
1209
1210 #ifdef DEBUG
1211         urb_priv.actual_length = 0;
1212         pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB", usb_pipein(pipe));
1213 #else
1214         wait_ms(1);
1215 #endif
1216         if (!maxsize) {
1217                 err("submit_common_message: pipesize for pipe %lx is zero",
1218                         pipe);
1219                 return -1;
1220         }
1221
1222         if (sohci_submit_job(dev, pipe, buffer, transfer_len, setup, interval) < 0) {
1223                 err("sohci_submit_job failed");
1224                 return -1;
1225         }
1226
1227         wait_ms(10);
1228         /* ohci_dump_status(&gohci); */
1229
1230         /* allow more time for a BULK device to react - some are slow */
1231 #define BULK_TO  5000   /* timeout in milliseconds */
1232         if (usb_pipetype (pipe) == PIPE_BULK)
1233                 timeout = BULK_TO;
1234         else
1235                 timeout = 100;
1236
1237         /* wait for it to complete */
1238         for (;;) {
1239                 /* check whether the controller is done */
1240                 stat = hc_interrupt();
1241                 if (stat < 0) {
1242                         stat = USB_ST_CRC_ERR;
1243                         break;
1244                 }
1245                 if (stat >= 0 && stat != 0xff) {
1246                         /* 0xff is returned for an SF-interrupt */
1247                         break;
1248                 }
1249                 if (--timeout) {
1250                         wait_ms(1);
1251                 } else {
1252                         err("CTL:TIMEOUT ");
1253                         stat = USB_ST_CRC_ERR;
1254                         break;
1255                 }
1256         }
1257         /* we got an Root Hub Status Change interrupt */
1258         if (got_rhsc) {
1259 #ifdef DEBUG
1260                 ohci_dump_roothub (&gohci, 1);
1261 #endif
1262                 got_rhsc = 0;
1263                 /* abuse timeout */
1264                 timeout = rh_check_port_status(&gohci);
1265                 if (timeout >= 0) {
1266 #if 0 /* this does nothing useful, but leave it here in case that changes */
1267                         /* the called routine adds 1 to the passed value */
1268                         usb_hub_port_connect_change(gohci.rh.dev, timeout - 1);
1269 #endif
1270                         /*
1271                          * XXX
1272                          * This is potentially dangerous because it assumes
1273                          * that only one device is ever plugged in!
1274                          */
1275                         devgone = dev;
1276                 }
1277         }
1278
1279         dev->status = stat;
1280         dev->act_len = transfer_len;
1281
1282 #ifdef DEBUG
1283         pkt_print(dev, pipe, buffer, transfer_len, setup, "RET(ctlr)", usb_pipein(pipe));
1284 #else
1285         wait_ms(1);
1286 #endif
1287
1288         /* free TDs in urb_priv */
1289         urb_free_priv (&urb_priv);
1290         return 0;
1291 }
1292
1293 /* submit routines called from usb.c */
1294 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1295                 int transfer_len)
1296 {
1297         info("submit_bulk_msg");
1298         return submit_common_msg(dev, pipe, buffer, transfer_len, NULL, 0);
1299 }
1300
1301 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1302                 int transfer_len, struct devrequest *setup)
1303 {
1304         int maxsize = usb_maxpacket(dev, pipe);
1305
1306         info("submit_control_msg");
1307 #ifdef DEBUG
1308         urb_priv.actual_length = 0;
1309         pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB", usb_pipein(pipe));
1310 #else
1311         wait_ms(1);
1312 #endif
1313         if (!maxsize) {
1314                 err("submit_control_message: pipesize for pipe %lx is zero",
1315                         pipe);
1316                 return -1;
1317         }
1318         if (((pipe >> 8) & 0x7f) == gohci.rh.devnum) {
1319                 gohci.rh.dev = dev;
1320                 /* root hub - redirect */
1321                 return ohci_submit_rh_msg(dev, pipe, buffer, transfer_len,
1322                         setup);
1323         }
1324
1325         return submit_common_msg(dev, pipe, buffer, transfer_len, setup, 0);
1326 }
1327
1328 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1329                 int transfer_len, int interval)
1330 {
1331         info("submit_int_msg");
1332         return -1;
1333 }
1334
1335 /*-------------------------------------------------------------------------*
1336  * HC functions
1337  *-------------------------------------------------------------------------*/
1338
1339 /* reset the HC and BUS */
1340
1341 static int hc_reset (ohci_t *ohci)
1342 {
1343         int timeout = 30;
1344         int smm_timeout = 50; /* 0,5 sec */
1345
1346         if (readl (&ohci->regs->control) & OHCI_CTRL_IR) { /* SMM owns the HC */
1347                 writel (OHCI_OCR, &ohci->regs->cmdstatus); /* request ownership */
1348                 info("USB HC TakeOver from SMM");
1349                 while (readl (&ohci->regs->control) & OHCI_CTRL_IR) {
1350                         wait_ms (10);
1351                         if (--smm_timeout == 0) {
1352                                 err("USB HC TakeOver failed!");
1353                                 return -1;
1354                         }
1355                 }
1356         }
1357
1358         /* Disable HC interrupts */
1359         writel (OHCI_INTR_MIE, &ohci->regs->intrdisable);
1360
1361         dbg("USB HC reset_hc usb-%s: ctrl = 0x%X ;",
1362                 ohci->slot_name,
1363                 readl (&ohci->regs->control));
1364
1365         /* Reset USB (needed by some controllers) */
1366         writel (0, &ohci->regs->control);
1367
1368         /* HC Reset requires max 10 us delay */
1369         writel (OHCI_HCR,  &ohci->regs->cmdstatus);
1370         while ((readl (&ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
1371                 if (--timeout == 0) {
1372                         err("USB HC reset timed out!");
1373                         return -1;
1374                 }
1375                 udelay (1);
1376         }
1377         return 0;
1378 }
1379
1380 /*-------------------------------------------------------------------------*/
1381
1382 /* Start an OHCI controller, set the BUS operational
1383  * enable interrupts
1384  * connect the virtual root hub */
1385
1386 static int hc_start (ohci_t * ohci)
1387 {
1388         __u32 mask;
1389         unsigned int fminterval;
1390
1391         ohci->disabled = 1;
1392
1393         /* Tell the controller where the control and bulk lists are
1394          * The lists are empty now. */
1395
1396         writel (0, &ohci->regs->ed_controlhead);
1397         writel (0, &ohci->regs->ed_bulkhead);
1398
1399         writel ((__u32)ohci->hcca, &ohci->regs->hcca); /* a reset clears this */
1400
1401         fminterval = 0x2edf;
1402         writel ((fminterval * 9) / 10, &ohci->regs->periodicstart);
1403         fminterval |= ((((fminterval - 210) * 6) / 7) << 16);
1404         writel (fminterval, &ohci->regs->fminterval);
1405         writel (0x628, &ohci->regs->lsthresh);
1406
1407         /* start controller operations */
1408         ohci->hc_control = OHCI_CONTROL_INIT | OHCI_USB_OPER;
1409         ohci->disabled = 0;
1410         writel (ohci->hc_control, &ohci->regs->control);
1411
1412         /* disable all interrupts */
1413         mask = (OHCI_INTR_SO | OHCI_INTR_WDH | OHCI_INTR_SF | OHCI_INTR_RD |
1414                         OHCI_INTR_UE | OHCI_INTR_FNO | OHCI_INTR_RHSC |
1415                         OHCI_INTR_OC | OHCI_INTR_MIE);
1416         writel (mask, &ohci->regs->intrdisable);
1417         /* clear all interrupts */
1418         mask &= ~OHCI_INTR_MIE;
1419         writel (mask, &ohci->regs->intrstatus);
1420         /* Choose the interrupts we care about now  - but w/o MIE */
1421         mask = OHCI_INTR_RHSC | OHCI_INTR_UE | OHCI_INTR_WDH | OHCI_INTR_SO;
1422         writel (mask, &ohci->regs->intrenable);
1423
1424 #ifdef  OHCI_USE_NPS
1425         /* required for AMD-756 and some Mac platforms */
1426         writel ((roothub_a (ohci) | RH_A_NPS) & ~RH_A_PSM,
1427                 &ohci->regs->roothub.a);
1428         writel (RH_HS_LPSC, &ohci->regs->roothub.status);
1429 #endif  /* OHCI_USE_NPS */
1430
1431 #define mdelay(n) ({unsigned long msec=(n); while (msec--) udelay(1000);})
1432         /* POTPGT delay is bits 24-31, in 2 ms units. */
1433         mdelay ((roothub_a (ohci) >> 23) & 0x1fe);
1434
1435         /* connect the virtual root hub */
1436         ohci->rh.devnum = 0;
1437
1438         return 0;
1439 }
1440
1441 /*-------------------------------------------------------------------------*/
1442
1443 /* an interrupt happens */
1444
1445 static int
1446 hc_interrupt (void)
1447 {
1448         ohci_t *ohci = &gohci;
1449         struct ohci_regs *regs = ohci->regs;
1450         int ints;
1451         int stat = -1;
1452
1453         if ((ohci->hcca->done_head != 0) && !(m32_swap (ohci->hcca->done_head) & 0x01)) {
1454                 ints =  OHCI_INTR_WDH;
1455         } else {
1456                 ints = readl (&regs->intrstatus);
1457         }
1458
1459         /* dbg("Interrupt: %x frame: %x", ints, le16_to_cpu (ohci->hcca->frame_no)); */
1460
1461         if (ints & OHCI_INTR_RHSC) {
1462                 got_rhsc = 1;
1463         }
1464
1465         if (ints & OHCI_INTR_UE) {
1466                 ohci->disabled++;
1467                 err ("OHCI Unrecoverable Error, controller usb-%s disabled",
1468                         ohci->slot_name);
1469                 /* e.g. due to PCI Master/Target Abort */
1470
1471 #ifdef  DEBUG
1472                 ohci_dump (ohci, 1);
1473 #else
1474         wait_ms(1);
1475 #endif
1476                 /* FIXME: be optimistic, hope that bug won't repeat often. */
1477                 /* Make some non-interrupt context restart the controller. */
1478                 /* Count and limit the retries though; either hardware or */
1479                 /* software errors can go forever... */
1480                 hc_reset (ohci);
1481                 return -1;
1482         }
1483
1484         if (ints & OHCI_INTR_WDH) {
1485                 wait_ms(1);
1486                 writel (OHCI_INTR_WDH, &regs->intrdisable);
1487                 stat = dl_done_list (&gohci, dl_reverse_done_list (&gohci));
1488                 writel (OHCI_INTR_WDH, &regs->intrenable);
1489         }
1490
1491         if (ints & OHCI_INTR_SO) {
1492                 dbg("USB Schedule overrun\n");
1493                 writel (OHCI_INTR_SO, &regs->intrenable);
1494                 stat = -1;
1495         }
1496
1497         /* FIXME:  this assumes SOF (1/ms) interrupts don't get lost... */
1498         if (ints & OHCI_INTR_SF) {
1499                 unsigned int frame = m16_swap (ohci->hcca->frame_no) & 1;
1500                 wait_ms(1);
1501                 writel (OHCI_INTR_SF, &regs->intrdisable);
1502                 if (ohci->ed_rm_list[frame] != NULL)
1503                         writel (OHCI_INTR_SF, &regs->intrenable);
1504                 stat = 0xff;
1505         }
1506
1507         writel (ints, &regs->intrstatus);
1508         return stat;
1509 }
1510
1511 /*-------------------------------------------------------------------------*/
1512
1513 /*-------------------------------------------------------------------------*/
1514
1515 /* De-allocate all resources.. */
1516
1517 static void hc_release_ohci (ohci_t *ohci)
1518 {
1519         dbg ("USB HC release ohci usb-%s", ohci->slot_name);
1520
1521         if (!ohci->disabled)
1522                 hc_reset (ohci);
1523 }
1524
1525 /*-------------------------------------------------------------------------*/
1526
1527 /*
1528  * low level initalisation routine, called from usb.c
1529  */
1530 static char ohci_inited = 0;
1531
1532 int usb_lowlevel_init(void)
1533 {
1534         S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();
1535         S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();
1536
1537         /*
1538          * Set the 48 MHz UPLL clocking. Values are taken from
1539          * "PLL value selection guide", 6-23, s3c2400_UM.pdf.
1540          */
1541         clk_power->UPLLCON = ((40 << 12) + (1 << 4) + 2);
1542         gpio->MISCCR |= 0x8; /* 1 = use pads related USB for USB host */
1543
1544         /*
1545          * Enable USB host clock.
1546          */
1547         clk_power->CLKCON |= (1 << 4);
1548
1549         memset (&gohci, 0, sizeof (ohci_t));
1550         memset (&urb_priv, 0, sizeof (urb_priv_t));
1551
1552         /* align the storage */
1553         if ((__u32)&ghcca[0] & 0xff) {
1554                 err("HCCA not aligned!!");
1555                 return -1;
1556         }
1557         phcca = &ghcca[0];
1558         info("aligned ghcca %p", phcca);
1559         memset(&ohci_dev, 0, sizeof(struct ohci_device));
1560         if ((__u32)&ohci_dev.ed[0] & 0x7) {
1561                 err("EDs not aligned!!");
1562                 return -1;
1563         }
1564         memset(gtd, 0, sizeof(td_t) * (NUM_TD + 1));
1565         if ((__u32)gtd & 0x7) {
1566                 err("TDs not aligned!!");
1567                 return -1;
1568         }
1569         ptd = gtd;
1570         gohci.hcca = phcca;
1571         memset (phcca, 0, sizeof (struct ohci_hcca));
1572
1573         gohci.disabled = 1;
1574         gohci.sleeping = 0;
1575         gohci.irq = -1;
1576         gohci.regs = (struct ohci_regs *)S3C24X0_USB_HOST_BASE;
1577
1578         gohci.flags = 0;
1579         gohci.slot_name = "s3c2400";
1580
1581         if (hc_reset (&gohci) < 0) {
1582                 hc_release_ohci (&gohci);
1583                 /* Initialization failed */
1584                 clk_power->CLKCON &= ~(1 << 4);
1585                 return -1;
1586         }
1587
1588         /* FIXME this is a second HC reset; why?? */
1589         writel (gohci.hc_control = OHCI_USB_RESET, &gohci.regs->control);
1590         wait_ms (10);
1591
1592         if (hc_start (&gohci) < 0) {
1593                 err ("can't start usb-%s", gohci.slot_name);
1594                 hc_release_ohci (&gohci);
1595                 /* Initialization failed */
1596                 clk_power->CLKCON &= ~(1 << 4);
1597                 return -1;
1598         }
1599
1600 #ifdef  DEBUG
1601         ohci_dump (&gohci, 1);
1602 #else
1603         wait_ms(1);
1604 #endif
1605         ohci_inited = 1;
1606         return 0;
1607 }
1608
1609 int usb_lowlevel_stop(void)
1610 {
1611         S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();
1612
1613         /* this gets called really early - before the controller has */
1614         /* even been initialized! */
1615         if (!ohci_inited)
1616                 return 0;
1617         /* TODO release any interrupts, etc. */
1618         /* call hc_release_ohci() here ? */
1619         hc_reset (&gohci);
1620         /* may not want to do this */
1621         clk_power->CLKCON &= ~(1 << 4);
1622         return 0;
1623 }
1624
1625 #endif /* CONFIG_USB_OHCI */