arch/powerpc/cpu/ppc4xx/usb_ohci.c

   1 /*
   2  * URB OHCI HCD (Host Controller Driver) for USB on the PPC440EP.
   3  *
   4  * (C) Copyright 2003-2004
   5  * Gary Jennejohn, DENX Software Engineering <garyj@denx.de>
   6  *
   7  * (C) Copyright 2004
   8  * Pierre Aubert, Staubli Faverges <p.aubert@staubli.com>
   9  *
  10  * Note: Much of this code has been derived from Linux 2.4
  11  * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
  12  * (C) Copyright 2000-2002 David Brownell
  13  *
  14  * See file CREDITS for list of people who contributed to this
  15  * project.
  16  *
  17  * This program is free software; you can redistribute it and/or
  18  * modify it under the terms of the GNU General Public License as
  19  * published by the Free Software Foundation; either version 2 of
  20  * the License, or (at your option) any later version.
  21  *
  22  * This program is distributed in the hope that it will be useful,
  23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  * GNU General Public License for more details.
  26  *
  27  * You should have received a copy of the GNU General Public License
  28  * along with this program; if not, write to the Free Software
  29  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  30  * MA 02111-1307 USA
  31  *
  32  */
  33 /*
  34  * IMPORTANT NOTES
  35  * 1 - this driver is intended for use with USB Mass Storage Devices
  36  *     (BBB) ONLY. There is NO support for Interrupt or Isochronous pipes!
  37  */
  38
  39 #include <common.h>
  40
  41 #ifdef CONFIG_USB_OHCI
  42
  43 #include <malloc.h>
  44 #include <usb.h>
  45 #include "usb_ohci.h"
  46
  47 #define OHCI_USE_NPS            /* force NoPowerSwitching mode */
  48 #undef OHCI_VERBOSE_DEBUG       /* not always helpful */
  49 #undef DEBUG
  50 #undef SHOW_INFO
  51 #undef OHCI_FILL_TRACE
  52
  53 /* For initializing controller (mask in an HCFS mode too) */
  54 #define OHCI_CONTROL_INIT \
  55         (OHCI_CTRL_CBSR & 0x3) | OHCI_CTRL_IE | OHCI_CTRL_PLE
  56
  57 #define readl(a) (*((volatile u32 *)(a)))
  58 #define writel(a, b) (*((volatile u32 *)(b)) = ((volatile u32)a))
  59
  60 #define min_t(type,x,y) ({ type __x = (x); type __y = (y); __x < __y ? __x: __y; })
  61
  62 #ifdef DEBUG
  63 #define dbg(format, arg...) printf("DEBUG: " format "\n", ## arg)
  64 #else
  65 #define dbg(format, arg...) do {} while(0)
  66 #endif /* DEBUG */
  67 #define err(format, arg...) printf("ERROR: " format "\n", ## arg)
  68 #ifdef SHOW_INFO
  69 #define info(format, arg...) printf("INFO: " format "\n", ## arg)
  70 #else
  71 #define info(format, arg...) do {} while(0)
  72 #endif
  73
  74 #define m16_swap(x) swap_16(x)
  75 #define m32_swap(x) swap_32(x)
  76
  77 #if defined(CONFIG_405EZ) || defined(CONFIG_440EP) || defined(CONFIG_440EPX)
  78 #define ohci_cpu_to_le16(x) (x)
  79 #define ohci_cpu_to_le32(x) (x)
  80 #else
  81 #define ohci_cpu_to_le16(x) swap_16(x)
  82 #define ohci_cpu_to_le32(x) swap_32(x)
  83 #endif
  84
  85 /* global ohci_t */
  86 static ohci_t gohci;
  87 /* this must be aligned to a 256 byte boundary */
  88 struct ohci_hcca ghcca[1];
  89 /* a pointer to the aligned storage */
  90 struct ohci_hcca *phcca;
  91 /* this allocates EDs for all possible endpoints */
  92 struct ohci_device ohci_dev;
  93 /* urb_priv */
  94 urb_priv_t urb_priv;
  95 /* RHSC flag */
  96 int got_rhsc;
  97 /* device which was disconnected */
  98 struct usb_device *devgone;
  99 /* flag guarding URB transation */
 100 int urb_finished = 0;
 101
 102 /*-------------------------------------------------------------------------*/
 103
 104 /* AMD-756 (D2 rev) reports corrupt register contents in some cases.
 105  * The erratum (#4) description is incorrect.  AMD's workaround waits
 106  * till some bits (mostly reserved) are clear; ok for all revs.
 107  */
 108 #define OHCI_QUIRK_AMD756 0xabcd
 109 #define read_roothub(hc, register, mask) ({ \
 110         u32 temp = readl (&hc->regs->roothub.register); \
 111         if (hc->flags & OHCI_QUIRK_AMD756) \
 112                 while (temp & mask) \
 113                         temp = readl (&hc->regs->roothub.register); \
 114         temp; })
 115
 116 static u32 roothub_a (struct ohci *hc)
 117         { return read_roothub (hc, a, 0xfc0fe000); }
 118 static inline u32 roothub_b (struct ohci *hc)
 119         { return readl (&hc->regs->roothub.b); }
 120 static inline u32 roothub_status (struct ohci *hc)
 121         { return readl (&hc->regs->roothub.status); }
 122 static u32 roothub_portstatus (struct ohci *hc, int i)
 123         { return read_roothub (hc, portstatus [i], 0xffe0fce0); }
 124
 125
 126 /* forward declaration */
 127 static int hc_interrupt (void);
 128 static void
 129 td_submit_job (struct usb_device * dev, unsigned long pipe, void * buffer,
 130         int transfer_len, struct devrequest * setup, urb_priv_t * urb, int interval);
 131
 132 /*-------------------------------------------------------------------------*
 133  * URB support functions
 134  *-------------------------------------------------------------------------*/
 135
 136 /* free HCD-private data associated with this URB */
 137
 138 static void urb_free_priv (urb_priv_t * urb)
 139 {
 140         int             i;
 141         int             last;
 142         struct td       * td;
 143
 144         last = urb->length - 1;
 145         if (last >= 0) {
 146                 for (i = 0; i <= last; i++) {
 147                         td = urb->td[i];
 148                         if (td) {
 149                                 td->usb_dev = NULL;
 150                                 urb->td[i] = NULL;
 151                         }
 152                 }
 153         }
 154 }
 155
 156 /*-------------------------------------------------------------------------*/
 157
 158 #ifdef DEBUG
 159 static int sohci_get_current_frame_number (struct usb_device * dev);
 160
 161 /* debug| print the main components of an URB
 162  * small: 0) header + data packets 1) just header */
 163
 164 static void pkt_print (struct usb_device * dev, unsigned long pipe, void * buffer,
 165         int transfer_len, struct devrequest * setup, char * str, int small)
 166 {
 167         urb_priv_t * purb = &urb_priv;
 168
 169         dbg("%s URB:[%4x] dev:%2d,ep:%2d-%c,type:%s,len:%d/%d stat:%#lx",
 170                         str,
 171                         sohci_get_current_frame_number (dev),
 172                         usb_pipedevice (pipe),
 173                         usb_pipeendpoint (pipe),
 174                         usb_pipeout (pipe)? 'O': 'I',
 175                         usb_pipetype (pipe) < 2? (usb_pipeint (pipe)? "INTR": "ISOC"):
 176                                 (usb_pipecontrol (pipe)? "CTRL": "BULK"),
 177                         purb->actual_length,
 178                         transfer_len, dev->status);
 179 #ifdef  OHCI_VERBOSE_DEBUG
 180         if (!small) {
 181                 int i, len;
 182
 183                 if (usb_pipecontrol (pipe)) {
 184                         printf (__FILE__ ": cmd(8):");
 185                         for (i = 0; i < 8 ; i++)
 186                                 printf (" %02x", ((__u8 *) setup) [i]);
 187                         printf ("\n");
 188                 }
 189                 if (transfer_len > 0 && buffer) {
 190                         printf (__FILE__ ": data(%d/%d):",
 191                                 purb->actual_length,
 192                                 transfer_len);
 193                         len = usb_pipeout (pipe)?
 194                                         transfer_len: purb->actual_length;
 195                         for (i = 0; i < 16 && i < len; i++)
 196                                 printf (" %02x", ((__u8 *) buffer) [i]);
 197                         printf ("%s\n", i < len? "...": "");
 198                 }
 199         }
 200 #endif
 201 }
 202
 203 /* just for debugging; prints non-empty branches of the int ed tree inclusive iso eds*/
 204 void ep_print_int_eds (ohci_t *ohci, char * str) {
 205         int i, j;
 206          __u32 * ed_p;
 207         for (i= 0; i < 32; i++) {
 208                 j = 5;
 209                 ed_p = &(ohci->hcca->int_table [i]);
 210                 if (*ed_p == 0)
 211                     continue;
 212                 printf (__FILE__ ": %s branch int %2d(%2x):", str, i, i);
 213                 while (*ed_p != 0 && j--) {
 214                         ed_t *ed = (ed_t *)ohci_cpu_to_le32(ed_p);
 215                         printf (" ed: %4x;", ed->hwINFO);
 216                         ed_p = &ed->hwNextED;
 217                 }
 218                 printf ("\n");
 219         }
 220 }
 221
 222 static void ohci_dump_intr_mask (char *label, __u32 mask)
 223 {
 224         dbg ("%s: 0x%08x%s%s%s%s%s%s%s%s%s",
 225                 label,
 226                 mask,
 227                 (mask & OHCI_INTR_MIE) ? " MIE" : "",
 228                 (mask & OHCI_INTR_OC) ? " OC" : "",
 229                 (mask & OHCI_INTR_RHSC) ? " RHSC" : "",
 230                 (mask & OHCI_INTR_FNO) ? " FNO" : "",
 231                 (mask & OHCI_INTR_UE) ? " UE" : "",
 232                 (mask & OHCI_INTR_RD) ? " RD" : "",
 233                 (mask & OHCI_INTR_SF) ? " SF" : "",
 234                 (mask & OHCI_INTR_WDH) ? " WDH" : "",
 235                 (mask & OHCI_INTR_SO) ? " SO" : ""
 236                 );
 237 }
 238
 239 static void maybe_print_eds (char *label, __u32 value)
 240 {
 241         ed_t *edp = (ed_t *)value;
 242
 243         if (value) {
 244                 dbg ("%s %08x", label, value);
 245                 dbg ("%08x", edp->hwINFO);
 246                 dbg ("%08x", edp->hwTailP);
 247                 dbg ("%08x", edp->hwHeadP);
 248                 dbg ("%08x", edp->hwNextED);
 249         }
 250 }
 251
 252 static char * hcfs2string (int state)
 253 {
 254         switch (state) {
 255                 case OHCI_USB_RESET:    return "reset";
 256                 case OHCI_USB_RESUME:   return "resume";
 257                 case OHCI_USB_OPER:     return "operational";
 258                 case OHCI_USB_SUSPEND:  return "suspend";
 259         }
 260         return "?";
 261 }
 262
 263 /* dump control and status registers */
 264 static void ohci_dump_status (ohci_t *controller)
 265 {
 266         struct ohci_regs        *regs = controller->regs;
 267         __u32                   temp;
 268
 269         temp = readl (&regs->revision) & 0xff;
 270         if (temp != 0x10)
 271                 dbg ("spec %d.%d", (temp >> 4), (temp & 0x0f));
 272
 273         temp = readl (&regs->control);
 274         dbg ("control: 0x%08x%s%s%s HCFS=%s%s%s%s%s CBSR=%d", temp,
 275                 (temp & OHCI_CTRL_RWE) ? " RWE" : "",
 276                 (temp & OHCI_CTRL_RWC) ? " RWC" : "",
 277                 (temp & OHCI_CTRL_IR) ? " IR" : "",
 278                 hcfs2string (temp & OHCI_CTRL_HCFS),
 279                 (temp & OHCI_CTRL_BLE) ? " BLE" : "",
 280                 (temp & OHCI_CTRL_CLE) ? " CLE" : "",
 281                 (temp & OHCI_CTRL_IE) ? " IE" : "",
 282                 (temp & OHCI_CTRL_PLE) ? " PLE" : "",
 283                 temp & OHCI_CTRL_CBSR
 284                 );
 285
 286         temp = readl (&regs->cmdstatus);
 287         dbg ("cmdstatus: 0x%08x SOC=%d%s%s%s%s", temp,
 288                 (temp & OHCI_SOC) >> 16,
 289                 (temp & OHCI_OCR) ? " OCR" : "",
 290                 (temp & OHCI_BLF) ? " BLF" : "",
 291                 (temp & OHCI_CLF) ? " CLF" : "",
 292                 (temp & OHCI_HCR) ? " HCR" : ""
 293                 );
 294
 295         ohci_dump_intr_mask ("intrstatus", readl (&regs->intrstatus));
 296         ohci_dump_intr_mask ("intrenable", readl (&regs->intrenable));
 297
 298         maybe_print_eds ("ed_periodcurrent", readl (&regs->ed_periodcurrent));
 299
 300         maybe_print_eds ("ed_controlhead", readl (&regs->ed_controlhead));
 301         maybe_print_eds ("ed_controlcurrent", readl (&regs->ed_controlcurrent));
 302
 303         maybe_print_eds ("ed_bulkhead", readl (&regs->ed_bulkhead));
 304         maybe_print_eds ("ed_bulkcurrent", readl (&regs->ed_bulkcurrent));
 305
 306         maybe_print_eds ("donehead", readl (&regs->donehead));
 307 }
 308
 309 static void ohci_dump_roothub (ohci_t *controller, int verbose)
 310 {
 311         __u32                   temp, ndp, i;
 312
 313         temp = roothub_a (controller);
 314         ndp = (temp & RH_A_NDP);
 315
 316         if (verbose) {
 317                 dbg ("roothub.a: %08x POTPGT=%d%s%s%s%s%s NDP=%d", temp,
 318                         ((temp & RH_A_POTPGT) >> 24) & 0xff,
 319                         (temp & RH_A_NOCP) ? " NOCP" : "",
 320                         (temp & RH_A_OCPM) ? " OCPM" : "",
 321                         (temp & RH_A_DT) ? " DT" : "",
 322                         (temp & RH_A_NPS) ? " NPS" : "",
 323                         (temp & RH_A_PSM) ? " PSM" : "",
 324                         ndp
 325                         );
 326                 temp = roothub_b (controller);
 327                 dbg ("roothub.b: %08x PPCM=%04x DR=%04x",
 328                         temp,
 329                         (temp & RH_B_PPCM) >> 16,
 330                         (temp & RH_B_DR)
 331                         );
 332                 temp = roothub_status (controller);
 333                 dbg ("roothub.status: %08x%s%s%s%s%s%s",
 334                         temp,
 335                         (temp & RH_HS_CRWE) ? " CRWE" : "",
 336                         (temp & RH_HS_OCIC) ? " OCIC" : "",
 337                         (temp & RH_HS_LPSC) ? " LPSC" : "",
 338                         (temp & RH_HS_DRWE) ? " DRWE" : "",
 339                         (temp & RH_HS_OCI) ? " OCI" : "",
 340                         (temp & RH_HS_LPS) ? " LPS" : ""
 341                         );
 342         }
 343
 344         for (i = 0; i < ndp; i++) {
 345                 temp = roothub_portstatus (controller, i);
 346                 dbg ("roothub.portstatus [%d] = 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s",
 347                         i,
 348                         temp,
 349                         (temp & RH_PS_PRSC) ? " PRSC" : "",
 350                         (temp & RH_PS_OCIC) ? " OCIC" : "",
 351                         (temp & RH_PS_PSSC) ? " PSSC" : "",
 352                         (temp & RH_PS_PESC) ? " PESC" : "",
 353                         (temp & RH_PS_CSC) ? " CSC" : "",
 354
 355                         (temp & RH_PS_LSDA) ? " LSDA" : "",
 356                         (temp & RH_PS_PPS) ? " PPS" : "",
 357                         (temp & RH_PS_PRS) ? " PRS" : "",
 358                         (temp & RH_PS_POCI) ? " POCI" : "",
 359                         (temp & RH_PS_PSS) ? " PSS" : "",
 360
 361                         (temp & RH_PS_PES) ? " PES" : "",
 362                         (temp & RH_PS_CCS) ? " CCS" : ""
 363                         );
 364         }
 365 }
 366
 367 static void ohci_dump (ohci_t *controller, int verbose)
 368 {
 369         dbg ("OHCI controller usb-%s state", controller->slot_name);
 370
 371         /* dumps some of the state we know about */
 372         ohci_dump_status (controller);
 373         if (verbose)
 374                 ep_print_int_eds (controller, "hcca");
 375         dbg ("hcca frame #%04x", controller->hcca->frame_no);
 376         ohci_dump_roothub (controller, 1);
 377 }
 378
 379
 380 #endif /* DEBUG */
 381
 382 /*-------------------------------------------------------------------------*
 383  * Interface functions (URB)
 384  *-------------------------------------------------------------------------*/
 385
 386 /* get a transfer request */
 387
 388 int sohci_submit_job(struct usb_device *dev, unsigned long pipe, void *buffer,
 389                 int transfer_len, struct devrequest *setup, int interval)
 390 {
 391         ohci_t *ohci;
 392         ed_t * ed;
 393         urb_priv_t *purb_priv;
 394         int i, size = 0;
 395
 396         ohci = &gohci;
 397
 398         /* when controller's hung, permit only roothub cleanup attempts
 399          * such as powering down ports */
 400         if (ohci->disabled) {
 401                 err("sohci_submit_job: EPIPE");
 402                 return -1;
 403         }
 404
 405         /* if we have an unfinished URB from previous transaction let's
 406          * fail and scream as quickly as possible so as not to corrupt
 407          * further communication */
 408         if (!urb_finished) {
 409                 err("sohci_submit_job: URB NOT FINISHED");
 410                 return -1;
 411         }
 412         /* we're about to begin a new transaction here so mark the URB unfinished */
 413         urb_finished = 0;
 414
 415         /* every endpoint has a ed, locate and fill it */
 416         if (!(ed = ep_add_ed (dev, pipe))) {
 417                 err("sohci_submit_job: ENOMEM");
 418                 return -1;
 419         }
 420
 421         /* for the private part of the URB we need the number of TDs (size) */
 422         switch (usb_pipetype (pipe)) {
 423                 case PIPE_BULK: /* one TD for every 4096 Byte */
 424                         size = (transfer_len - 1) / 4096 + 1;
 425                         break;
 426                 case PIPE_CONTROL: /* 1 TD for setup, 1 for ACK and 1 for every 4096 B */
 427                         size = (transfer_len == 0)? 2:
 428                                                 (transfer_len - 1) / 4096 + 3;
 429                         break;
 430         }
 431
 432         if (size >= (N_URB_TD - 1)) {
 433                 err("need %d TDs, only have %d", size, N_URB_TD);
 434                 return -1;
 435         }
 436         purb_priv = &urb_priv;
 437         purb_priv->pipe = pipe;
 438
 439         /* fill the private part of the URB */
 440         purb_priv->length = size;
 441         purb_priv->ed = ed;
 442         purb_priv->actual_length = 0;
 443
 444         /* allocate the TDs */
 445         /* note that td[0] was allocated in ep_add_ed */
 446         for (i = 0; i < size; i++) {
 447                 purb_priv->td[i] = td_alloc (dev);
 448                 if (!purb_priv->td[i]) {
 449                         purb_priv->length = i;
 450                         urb_free_priv (purb_priv);
 451                         err("sohci_submit_job: ENOMEM");
 452                         return -1;
 453                 }
 454         }
 455
 456         if (ed->state == ED_NEW || (ed->state & ED_DEL)) {
 457                 urb_free_priv (purb_priv);
 458                 err("sohci_submit_job: EINVAL");
 459                 return -1;
 460         }
 461
 462         /* link the ed into a chain if is not already */
 463         if (ed->state != ED_OPER)
 464                 ep_link (ohci, ed);
 465
 466         /* fill the TDs and link it to the ed */
 467         td_submit_job(dev, pipe, buffer, transfer_len, setup, purb_priv, interval);
 468
 469         return 0;
 470 }
 471
 472 /*-------------------------------------------------------------------------*/
 473
 474 #ifdef DEBUG
 475 /* tell us the current USB frame number */
 476
 477 static int sohci_get_current_frame_number (struct usb_device *usb_dev)
 478 {
 479         ohci_t *ohci = &gohci;
 480
 481         return ohci_cpu_to_le16 (ohci->hcca->frame_no);
 482 }
 483 #endif
 484
 485 /*-------------------------------------------------------------------------*
 486  * ED handling functions
 487  *-------------------------------------------------------------------------*/
 488
 489 /* link an ed into one of the HC chains */
 490
 491 static int ep_link (ohci_t *ohci, ed_t *edi)
 492 {
 493         volatile ed_t *ed = edi;
 494
 495         ed->state = ED_OPER;
 496
 497         switch (ed->type) {
 498         case PIPE_CONTROL:
 499                 ed->hwNextED = 0;
 500                 if (ohci->ed_controltail == NULL) {
 501                         writel (ed, &ohci->regs->ed_controlhead);
 502                 } else {
 503                         ohci->ed_controltail->hwNextED = ohci_cpu_to_le32 ((unsigned long)ed);
 504                 }
 505                 ed->ed_prev = ohci->ed_controltail;
 506                 if (!ohci->ed_controltail && !ohci->ed_rm_list[0] &&
 507                         !ohci->ed_rm_list[1] && !ohci->sleeping) {
 508                         ohci->hc_control |= OHCI_CTRL_CLE;
 509                         writel (ohci->hc_control, &ohci->regs->control);
 510                 }
 511                 ohci->ed_controltail = edi;
 512                 break;
 513
 514         case PIPE_BULK:
 515                 ed->hwNextED = 0;
 516                 if (ohci->ed_bulktail == NULL) {
 517                         writel (ed, &ohci->regs->ed_bulkhead);
 518                 } else {
 519                         ohci->ed_bulktail->hwNextED = ohci_cpu_to_le32 ((unsigned long)ed);
 520                 }
 521                 ed->ed_prev = ohci->ed_bulktail;
 522                 if (!ohci->ed_bulktail && !ohci->ed_rm_list[0] &&
 523                         !ohci->ed_rm_list[1] && !ohci->sleeping) {
 524                         ohci->hc_control |= OHCI_CTRL_BLE;
 525                         writel (ohci->hc_control, &ohci->regs->control);
 526                 }
 527                 ohci->ed_bulktail = edi;
 528                 break;
 529         }
 530         return 0;
 531 }
 532
 533 /*-------------------------------------------------------------------------*/
 534
 535 /* unlink an ed from one of the HC chains.
 536  * just the link to the ed is unlinked.
 537  * the link from the ed still points to another operational ed or 0
 538  * so the HC can eventually finish the processing of the unlinked ed */
 539
 540 static int ep_unlink (ohci_t *ohci, ed_t *edi)
 541 {
 542         volatile ed_t *ed = edi;
 543
 544         ed->hwINFO |= ohci_cpu_to_le32 (OHCI_ED_SKIP);
 545
 546         switch (ed->type) {
 547         case PIPE_CONTROL:
 548                 if (ed->ed_prev == NULL) {
 549                         if (!ed->hwNextED) {
 550                                 ohci->hc_control &= ~OHCI_CTRL_CLE;
 551                                 writel (ohci->hc_control, &ohci->regs->control);
 552                         }
 553                         writel (ohci_cpu_to_le32 (*((__u32 *)&ed->hwNextED)), &ohci->regs->ed_controlhead);
 554                 } else {
 555                         ed->ed_prev->hwNextED = ed->hwNextED;
 556                 }
 557                 if (ohci->ed_controltail == ed) {
 558                         ohci->ed_controltail = ed->ed_prev;
 559                 } else {
 560                         ((ed_t *)ohci_cpu_to_le32 (*((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
 561                 }
 562                 break;
 563
 564         case PIPE_BULK:
 565                 if (ed->ed_prev == NULL) {
 566                         if (!ed->hwNextED) {
 567                                 ohci->hc_control &= ~OHCI_CTRL_BLE;
 568                                 writel (ohci->hc_control, &ohci->regs->control);
 569                         }
 570                         writel (ohci_cpu_to_le32 (*((__u32 *)&ed->hwNextED)), &ohci->regs->ed_bulkhead);
 571                 } else {
 572                         ed->ed_prev->hwNextED = ed->hwNextED;
 573                 }
 574                 if (ohci->ed_bulktail == ed) {
 575                         ohci->ed_bulktail = ed->ed_prev;
 576                 } else {
 577                         ((ed_t *)ohci_cpu_to_le32 (*((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
 578                 }
 579                 break;
 580         }
 581         ed->state = ED_UNLINK;
 582         return 0;
 583 }
 584
 585
 586 /*-------------------------------------------------------------------------*/
 587
 588 /* add/reinit an endpoint; this should be done once at the usb_set_configuration command,
 589  * but the USB stack is a little bit stateless  so we do it at every transaction
 590  * if the state of the ed is ED_NEW then a dummy td is added and the state is changed to ED_UNLINK
 591  * in all other cases the state is left unchanged
 592  * the ed info fields are setted anyway even though most of them should not change */
 593
 594 static ed_t * ep_add_ed (struct usb_device *usb_dev, unsigned long pipe)
 595 {
 596         td_t *td;
 597         ed_t *ed_ret;
 598         volatile ed_t *ed;
 599
 600         ed = ed_ret = &ohci_dev.ed[(usb_pipeendpoint (pipe) << 1) |
 601                         (usb_pipecontrol (pipe)? 0: usb_pipeout (pipe))];
 602
 603         if ((ed->state & ED_DEL) || (ed->state & ED_URB_DEL)) {
 604                 err("ep_add_ed: pending delete");
 605                 /* pending delete request */
 606                 return NULL;
 607         }
 608
 609         if (ed->state == ED_NEW) {
 610                 ed->hwINFO = ohci_cpu_to_le32 (OHCI_ED_SKIP); /* skip ed */
 611                 /* dummy td; end of td list for ed */
 612                 td = td_alloc (usb_dev);
 613                 ed->hwTailP = ohci_cpu_to_le32 ((unsigned long)td);
 614                 ed->hwHeadP = ed->hwTailP;
 615                 ed->state = ED_UNLINK;
 616                 ed->type = usb_pipetype (pipe);
 617                 ohci_dev.ed_cnt++;
 618         }
 619
 620         ed->hwINFO = ohci_cpu_to_le32 (usb_pipedevice (pipe)
 621                         | usb_pipeendpoint (pipe) << 7
 622                         | (usb_pipeisoc (pipe)? 0x8000: 0)
 623                         | (usb_pipecontrol (pipe)? 0: (usb_pipeout (pipe)? 0x800: 0x1000))
 624                         | (usb_dev->speed == USB_SPEED_LOW) << 13
 625                         | usb_maxpacket (usb_dev, pipe) << 16);
 626
 627         return ed_ret;
 628 }
 629
 630 /*-------------------------------------------------------------------------*
 631  * TD handling functions
 632  *-------------------------------------------------------------------------*/
 633
 634 /* enqueue next TD for this URB (OHCI spec 5.2.8.2) */
 635
 636 static void td_fill (ohci_t *ohci, unsigned int info,
 637         void *data, int len,
 638         struct usb_device *dev, int index, urb_priv_t *urb_priv)
 639 {
 640         volatile td_t  *td, *td_pt;
 641 #ifdef OHCI_FILL_TRACE
 642         int i;
 643 #endif
 644
 645         if (index > urb_priv->length) {
 646                 err("index > length");
 647                 return;
 648         }
 649         /* use this td as the next dummy */
 650         td_pt = urb_priv->td [index];
 651         td_pt->hwNextTD = 0;
 652
 653         /* fill the old dummy TD */
 654         td = urb_priv->td [index] = (td_t *)(ohci_cpu_to_le32 (urb_priv->ed->hwTailP) & ~0xf);
 655
 656         td->ed = urb_priv->ed;
 657         td->next_dl_td = NULL;
 658         td->index = index;
 659         td->data = (__u32)data;
 660 #ifdef OHCI_FILL_TRACE
 661         if (usb_pipebulk(urb_priv->pipe) && usb_pipeout(urb_priv->pipe)) {
 662                 for (i = 0; i < len; i++)
 663                 printf("td->data[%d] %#2x ",i, ((unsigned char *)td->data)[i]);
 664                 printf("\n");
 665         }
 666 #endif
 667         if (!len)
 668                 data = 0;
 669
 670         td->hwINFO = ohci_cpu_to_le32 (info);
 671         td->hwCBP = ohci_cpu_to_le32 ((unsigned long)data);
 672         if (data)
 673                 td->hwBE = ohci_cpu_to_le32 ((unsigned long)(data + len - 1));
 674         else
 675                 td->hwBE = 0;
 676         td->hwNextTD = ohci_cpu_to_le32 ((unsigned long)td_pt);
 677
 678         /* append to queue */
 679         td->ed->hwTailP = td->hwNextTD;
 680 }
 681
 682 /*-------------------------------------------------------------------------*/
 683
 684 /* prepare all TDs of a transfer */
 685 static void td_submit_job (struct usb_device *dev, unsigned long pipe, void *buffer,
 686         int transfer_len, struct devrequest *setup, urb_priv_t *urb, int interval)
 687 {
 688         ohci_t *ohci = &gohci;
 689         int data_len = transfer_len;
 690         void *data;
 691         int cnt = 0;
 692         __u32 info = 0;
 693         unsigned int toggle = 0;
 694
 695         /* OHCI handles the DATA-toggles itself, we just use the USB-toggle bits for reseting */
 696         if(usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe))) {
 697                 toggle = TD_T_TOGGLE;
 698         } else {
 699                 toggle = TD_T_DATA0;
 700                 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 1);
 701         }
 702         urb->td_cnt = 0;
 703         if (data_len)
 704                 data = buffer;
 705         else
 706                 data = 0;
 707
 708         switch (usb_pipetype (pipe)) {
 709         case PIPE_BULK:
 710                 info = usb_pipeout (pipe)?
 711                         TD_CC | TD_DP_OUT : TD_CC | TD_DP_IN ;
 712                 while(data_len > 4096) {
 713                         td_fill (ohci, info | (cnt? TD_T_TOGGLE:toggle), data, 4096, dev, cnt, urb);
 714                         data += 4096; data_len -= 4096; cnt++;
 715                 }
 716                 info = usb_pipeout (pipe)?
 717                         TD_CC | TD_DP_OUT : TD_CC | TD_R | TD_DP_IN ;
 718                 td_fill (ohci, info | (cnt? TD_T_TOGGLE:toggle), data, data_len, dev, cnt, urb);
 719                 cnt++;
 720
 721                 if (!ohci->sleeping)
 722                         writel (OHCI_BLF, &ohci->regs->cmdstatus); /* start bulk list */
 723                 break;
 724
 725         case PIPE_CONTROL:
 726                 info = TD_CC | TD_DP_SETUP | TD_T_DATA0;
 727                 td_fill (ohci, info, setup, 8, dev, cnt++, urb);
 728                 if (data_len > 0) {
 729                         info = usb_pipeout (pipe)?
 730                                 TD_CC | TD_R | TD_DP_OUT | TD_T_DATA1 : TD_CC | TD_R | TD_DP_IN | TD_T_DATA1;
 731                         /* NOTE:  mishandles transfers >8K, some >4K */
 732                         td_fill (ohci, info, data, data_len, dev, cnt++, urb);
 733                 }
 734                 info = usb_pipeout (pipe)?
 735                         TD_CC | TD_DP_IN | TD_T_DATA1: TD_CC | TD_DP_OUT | TD_T_DATA1;
 736                 td_fill (ohci, info, data, 0, dev, cnt++, urb);
 737                 if (!ohci->sleeping)
 738                         writel (OHCI_CLF, &ohci->regs->cmdstatus); /* start Control list */
 739                 break;
 740         }
 741         if (urb->length != cnt)
 742                 dbg("TD LENGTH %d != CNT %d", urb->length, cnt);
 743 }
 744
 745 /*-------------------------------------------------------------------------*
 746  * Done List handling functions
 747  *-------------------------------------------------------------------------*/
 748
 749
 750 /* calculate the transfer length and update the urb */
 751
 752 static void dl_transfer_length(td_t * td)
 753 {
 754         __u32 tdBE, tdCBP;
 755         urb_priv_t *lurb_priv = &urb_priv;
 756
 757         tdBE   = ohci_cpu_to_le32 (td->hwBE);
 758         tdCBP  = ohci_cpu_to_le32 (td->hwCBP);
 759
 760
 761         if (!(usb_pipecontrol(lurb_priv->pipe) &&
 762             ((td->index == 0) || (td->index == lurb_priv->length - 1)))) {
 763                 if (tdBE != 0) {
 764                         if (td->hwCBP == 0)
 765                                 lurb_priv->actual_length += tdBE - td->data + 1;
 766                         else
 767                                 lurb_priv->actual_length += tdCBP - td->data;
 768                 }
 769         }
 770 }
 771
 772 /*-------------------------------------------------------------------------*/
 773
 774 /* replies to the request have to be on a FIFO basis so
 775  * we reverse the reversed done-list */
 776
 777 static td_t * dl_reverse_done_list (ohci_t *ohci)
 778 {
 779         __u32 td_list_hc;
 780         td_t *td_rev = NULL;
 781         td_t *td_list = NULL;
 782         urb_priv_t *lurb_priv = NULL;
 783
 784         td_list_hc = ohci_cpu_to_le32 (ohci->hcca->done_head) & 0xfffffff0;
 785         ohci->hcca->done_head = 0;
 786
 787         while (td_list_hc) {
 788                 td_list = (td_t *)td_list_hc;
 789
 790                 if (TD_CC_GET (ohci_cpu_to_le32 (td_list->hwINFO))) {
 791                         lurb_priv = &urb_priv;
 792                         dbg(" USB-error/status: %x : %p",
 793                                         TD_CC_GET (ohci_cpu_to_le32 (td_list->hwINFO)), td_list);
 794                         if (td_list->ed->hwHeadP & ohci_cpu_to_le32 (0x1)) {
 795                                 if (lurb_priv && ((td_list->index + 1) < lurb_priv->length)) {
 796                                         td_list->ed->hwHeadP =
 797                                                 (lurb_priv->td[lurb_priv->length - 1]->hwNextTD & ohci_cpu_to_le32 (0xfffffff0)) |
 798                                                                         (td_list->ed->hwHeadP & ohci_cpu_to_le32 (0x2));
 799                                         lurb_priv->td_cnt += lurb_priv->length - td_list->index - 1;
 800                                 } else
 801                                         td_list->ed->hwHeadP &= ohci_cpu_to_le32 (0xfffffff2);
 802                         }
 803 #ifdef CONFIG_MPC5200
 804                         td_list->hwNextTD = 0;
 805 #endif
 806                 }
 807
 808                 td_list->next_dl_td = td_rev;
 809                 td_rev = td_list;
 810                 td_list_hc = ohci_cpu_to_le32 (td_list->hwNextTD) & 0xfffffff0;
 811         }
 812         return td_list;
 813 }
 814
 815 /*-------------------------------------------------------------------------*/
 816
 817 /* td done list */
 818 static int dl_done_list (ohci_t *ohci, td_t *td_list)
 819 {
 820         td_t *td_list_next = NULL;
 821         ed_t *ed;
 822         int cc = 0;
 823         int stat = 0;
 824         /* urb_t *urb; */
 825         urb_priv_t *lurb_priv;
 826         __u32 tdINFO, edHeadP, edTailP;
 827
 828         while (td_list) {
 829                 td_list_next = td_list->next_dl_td;
 830
 831                 lurb_priv = &urb_priv;
 832                 tdINFO = ohci_cpu_to_le32 (td_list->hwINFO);
 833
 834                 ed = td_list->ed;
 835
 836                 dl_transfer_length(td_list);
 837
 838                 /* error code of transfer */
 839                 cc = TD_CC_GET (tdINFO);
 840                 if (++(lurb_priv->td_cnt) == lurb_priv->length) {
 841                         if ((ed->state & (ED_OPER | ED_UNLINK))
 842                                         && (lurb_priv->state != URB_DEL)) {
 843                                 dbg("ConditionCode %#x", cc);
 844                                 stat = cc_to_error[cc];
 845                                 urb_finished = 1;
 846                         }
 847                 }
 848
 849                 if (ed->state != ED_NEW) {
 850                         edHeadP = ohci_cpu_to_le32 (ed->hwHeadP) & 0xfffffff0;
 851                         edTailP = ohci_cpu_to_le32 (ed->hwTailP);
 852
 853                         /* unlink eds if they are not busy */
 854                         if ((edHeadP == edTailP) && (ed->state == ED_OPER))
 855                                 ep_unlink (ohci, ed);
 856                 }
 857
 858                 td_list = td_list_next;
 859         }
 860         return stat;
 861 }
 862
 863 /*-------------------------------------------------------------------------*
 864  * Virtual Root Hub
 865  *-------------------------------------------------------------------------*/
 866
 867 /* Device descriptor */
 868 static __u8 root_hub_dev_des[] =
 869 {
 870         0x12,       /*  __u8  bLength; */
 871         0x01,       /*  __u8  bDescriptorType; Device */
 872         0x10,       /*  __u16 bcdUSB; v1.1 */
 873         0x01,
 874         0x09,       /*  __u8  bDeviceClass; HUB_CLASSCODE */
 875         0x00,       /*  __u8  bDeviceSubClass; */
 876         0x00,       /*  __u8  bDeviceProtocol; */
 877         0x08,       /*  __u8  bMaxPacketSize0; 8 Bytes */
 878         0x00,       /*  __u16 idVendor; */
 879         0x00,
 880         0x00,       /*  __u16 idProduct; */
 881         0x00,
 882         0x00,       /*  __u16 bcdDevice; */
 883         0x00,
 884         0x00,       /*  __u8  iManufacturer; */
 885         0x01,       /*  __u8  iProduct; */
 886         0x00,       /*  __u8  iSerialNumber; */
 887         0x01        /*  __u8  bNumConfigurations; */
 888 };
 889
 890
 891 /* Configuration descriptor */
 892 static __u8 root_hub_config_des[] =
 893 {
 894         0x09,       /*  __u8  bLength; */
 895         0x02,       /*  __u8  bDescriptorType; Configuration */
 896         0x19,       /*  __u16 wTotalLength; */
 897         0x00,
 898         0x01,       /*  __u8  bNumInterfaces; */
 899         0x01,       /*  __u8  bConfigurationValue; */
 900         0x00,       /*  __u8  iConfiguration; */
 901         0x40,       /*  __u8  bmAttributes;
 902                  Bit 7: Bus-powered, 6: Self-powered, 5 Remote-wakwup, 4..0: resvd */
 903         0x00,       /*  __u8  MaxPower; */
 904
 905         /* interface */
 906         0x09,       /*  __u8  if_bLength; */
 907         0x04,       /*  __u8  if_bDescriptorType; Interface */
 908         0x00,       /*  __u8  if_bInterfaceNumber; */
 909         0x00,       /*  __u8  if_bAlternateSetting; */
 910         0x01,       /*  __u8  if_bNumEndpoints; */
 911         0x09,       /*  __u8  if_bInterfaceClass; HUB_CLASSCODE */
 912         0x00,       /*  __u8  if_bInterfaceSubClass; */
 913         0x00,       /*  __u8  if_bInterfaceProtocol; */
 914         0x00,       /*  __u8  if_iInterface; */
 915
 916         /* endpoint */
 917         0x07,       /*  __u8  ep_bLength; */
 918         0x05,       /*  __u8  ep_bDescriptorType; Endpoint */
 919         0x81,       /*  __u8  ep_bEndpointAddress; IN Endpoint 1 */
 920         0x03,       /*  __u8  ep_bmAttributes; Interrupt */
 921         0x02,       /*  __u16 ep_wMaxPacketSize; ((MAX_ROOT_PORTS + 1) / 8 */
 922         0x00,
 923         0xff        /*  __u8  ep_bInterval; 255 ms */
 924 };
 925
 926 static unsigned char root_hub_str_index0[] =
 927 {
 928         0x04,                   /*  __u8  bLength; */
 929         0x03,                   /*  __u8  bDescriptorType; String-descriptor */
 930         0x09,                   /*  __u8  lang ID */
 931         0x04,                   /*  __u8  lang ID */
 932 };
 933
 934 static unsigned char root_hub_str_index1[] =
 935 {
 936         28,                     /*  __u8  bLength; */
 937         0x03,                   /*  __u8  bDescriptorType; String-descriptor */
 938         'O',                    /*  __u8  Unicode */
 939         0,                              /*  __u8  Unicode */
 940         'H',                    /*  __u8  Unicode */
 941         0,                              /*  __u8  Unicode */
 942         'C',                    /*  __u8  Unicode */
 943         0,                              /*  __u8  Unicode */
 944         'I',                    /*  __u8  Unicode */
 945         0,                              /*  __u8  Unicode */
 946         ' ',                    /*  __u8  Unicode */
 947         0,                              /*  __u8  Unicode */
 948         'R',                    /*  __u8  Unicode */
 949         0,                              /*  __u8  Unicode */
 950         'o',                    /*  __u8  Unicode */
 951         0,                              /*  __u8  Unicode */
 952         'o',                    /*  __u8  Unicode */
 953         0,                              /*  __u8  Unicode */
 954         't',                    /*  __u8  Unicode */
 955         0,                              /*  __u8  Unicode */
 956         ' ',                    /*  __u8  Unicode */
 957         0,                              /*  __u8  Unicode */
 958         'H',                    /*  __u8  Unicode */
 959         0,                              /*  __u8  Unicode */
 960         'u',                    /*  __u8  Unicode */
 961         0,                              /*  __u8  Unicode */
 962         'b',                    /*  __u8  Unicode */
 963         0,                              /*  __u8  Unicode */
 964 };
 965
 966 /* Hub class-specific descriptor is constructed dynamically */
 967
 968
 969 /*-------------------------------------------------------------------------*/
 970
 971 #define OK(x)                   len = (x); break
 972 #ifdef DEBUG
 973 #define WR_RH_STAT(x)           {info("WR:status %#8x", (x));writel((x), &gohci.regs->roothub.status);}
 974 #define WR_RH_PORTSTAT(x)       {info("WR:portstatus[%d] %#8x", wIndex-1, (x));writel((x), &gohci.regs->roothub.portstatus[wIndex-1]);}
 975 #else
 976 #define WR_RH_STAT(x)           writel((x), &gohci.regs->roothub.status)
 977 #define WR_RH_PORTSTAT(x)       writel((x), &gohci.regs->roothub.portstatus[wIndex-1])
 978 #endif
 979 #define RD_RH_STAT              roothub_status(&gohci)
 980 #define RD_RH_PORTSTAT          roothub_portstatus(&gohci,wIndex-1)
 981
 982 /* request to virtual root hub */
 983
 984 int rh_check_port_status(ohci_t *controller)
 985 {
 986         __u32 temp, ndp, i;
 987         int res;
 988
 989         res = -1;
 990         temp = roothub_a (controller);
 991         ndp = (temp & RH_A_NDP);
 992         for (i = 0; i < ndp; i++) {
 993                 temp = roothub_portstatus (controller, i);
 994                 /* check for a device disconnect */
 995                 if (((temp & (RH_PS_PESC | RH_PS_CSC)) ==
 996                         (RH_PS_PESC | RH_PS_CSC)) &&
 997                         ((temp & RH_PS_CCS) == 0)) {
 998                         res = i;
 999                         break;
1000                 }
1001         }
1002         return res;
1003 }
1004
1005 static int ohci_submit_rh_msg(struct usb_device *dev, unsigned long pipe,
1006                 void *buffer, int transfer_len, struct devrequest *cmd)
1007 {
1008         void * data = buffer;
1009         int leni = transfer_len;
1010         int len = 0;
1011         int stat = 0;
1012         __u32 datab[4];
1013         __u8 *data_buf = (__u8 *)datab;
1014         __u16 bmRType_bReq;
1015         __u16 wValue;
1016         __u16 wIndex;
1017         __u16 wLength;
1018
1019 #ifdef DEBUG
1020 urb_priv.actual_length = 0;
1021 pkt_print(dev, pipe, buffer, transfer_len, cmd, "SUB(rh)", usb_pipein(pipe));
1022 #endif
1023         if (usb_pipeint(pipe)) {
1024                 info("Root-Hub submit IRQ: NOT implemented");
1025                 return 0;
1026         }
1027
1028         bmRType_bReq  = cmd->requesttype | (cmd->request << 8);
1029         wValue        = m16_swap (cmd->value);
1030         wIndex        = m16_swap (cmd->index);
1031         wLength       = m16_swap (cmd->length);
1032
1033         info("Root-Hub: adr: %2x cmd(%1x): %08x %04x %04x %04x",
1034                 dev->devnum, 8, bmRType_bReq, wValue, wIndex, wLength);
1035
1036         switch (bmRType_bReq) {
1037         /* Request Destination:
1038            without flags: Device,
1039            RH_INTERFACE: interface,
1040            RH_ENDPOINT: endpoint,
1041            RH_CLASS means HUB here,
1042            RH_OTHER | RH_CLASS  almost ever means HUB_PORT here
1043         */
1044
1045         case RH_GET_STATUS:
1046                         *(__u16 *) data_buf = m16_swap (1); OK (2);
1047         case RH_GET_STATUS | RH_INTERFACE:
1048                         *(__u16 *) data_buf = m16_swap (0); OK (2);
1049         case RH_GET_STATUS | RH_ENDPOINT:
1050                         *(__u16 *) data_buf = m16_swap (0); OK (2);
1051         case RH_GET_STATUS | RH_CLASS:
1052                         *(__u32 *) data_buf = m32_swap (
1053                                 RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE));
1054                         OK (4);
1055         case RH_GET_STATUS | RH_OTHER | RH_CLASS:
1056                         *(__u32 *) data_buf = m32_swap (RD_RH_PORTSTAT); OK (4);
1057
1058         case RH_CLEAR_FEATURE | RH_ENDPOINT:
1059                 switch (wValue) {
1060                         case (RH_ENDPOINT_STALL): OK (0);
1061                 }
1062                 break;
1063
1064         case RH_CLEAR_FEATURE | RH_CLASS:
1065                 switch (wValue) {
1066                         case RH_C_HUB_LOCAL_POWER:
1067                                 OK(0);
1068                         case (RH_C_HUB_OVER_CURRENT):
1069                                         WR_RH_STAT(RH_HS_OCIC); OK (0);
1070                 }
1071                 break;
1072
1073         case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
1074                 switch (wValue) {
1075                         case (RH_PORT_ENABLE):
1076                                         WR_RH_PORTSTAT (RH_PS_CCS ); OK (0);
1077                         case (RH_PORT_SUSPEND):
1078                                         WR_RH_PORTSTAT (RH_PS_POCI); OK (0);
1079                         case (RH_PORT_POWER):
1080                                         WR_RH_PORTSTAT (RH_PS_LSDA); OK (0);
1081                         case (RH_C_PORT_CONNECTION):
1082                                         WR_RH_PORTSTAT (RH_PS_CSC ); OK (0);
1083                         case (RH_C_PORT_ENABLE):
1084                                         WR_RH_PORTSTAT (RH_PS_PESC); OK (0);
1085                         case (RH_C_PORT_SUSPEND):
1086                                         WR_RH_PORTSTAT (RH_PS_PSSC); OK (0);
1087                         case (RH_C_PORT_OVER_CURRENT):
1088                                         WR_RH_PORTSTAT (RH_PS_OCIC); OK (0);
1089                         case (RH_C_PORT_RESET):
1090                                         WR_RH_PORTSTAT (RH_PS_PRSC); OK (0);
1091                 }
1092                 break;
1093
1094         case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
1095                 switch (wValue) {
1096                         case (RH_PORT_SUSPEND):
1097                                         WR_RH_PORTSTAT (RH_PS_PSS ); OK (0);
1098                         case (RH_PORT_RESET): /* BUG IN HUP CODE *********/
1099                                         if (RD_RH_PORTSTAT & RH_PS_CCS)
1100                                             WR_RH_PORTSTAT (RH_PS_PRS);
1101                                         OK (0);
1102                         case (RH_PORT_POWER):
1103                                         WR_RH_PORTSTAT (RH_PS_PPS ); OK (0);
1104                         case (RH_PORT_ENABLE): /* BUG IN HUP CODE *********/
1105                                         if (RD_RH_PORTSTAT & RH_PS_CCS)
1106                                             WR_RH_PORTSTAT (RH_PS_PES );
1107                                         OK (0);
1108                 }
1109                 break;
1110
1111         case RH_SET_ADDRESS: gohci.rh.devnum = wValue; OK(0);
1112
1113         case RH_GET_DESCRIPTOR:
1114                 switch ((wValue & 0xff00) >> 8) {
1115                         case (0x01): /* device descriptor */
1116                                 len = min_t(unsigned int,
1117                                           leni,
1118                                           min_t(unsigned int,
1119                                               sizeof (root_hub_dev_des),
1120                                               wLength));
1121                                 data_buf = root_hub_dev_des; OK(len);
1122                         case (0x02): /* configuration descriptor */
1123                                 len = min_t(unsigned int,
1124                                           leni,
1125                                           min_t(unsigned int,
1126                                               sizeof (root_hub_config_des),
1127                                               wLength));
1128                                 data_buf = root_hub_config_des; OK(len);
1129                         case (0x03): /* string descriptors */
1130                                 if(wValue==0x0300) {
1131                                         len = min_t(unsigned int,
1132                                                   leni,
1133                                                   min_t(unsigned int,
1134                                                       sizeof (root_hub_str_index0),
1135                                                       wLength));
1136                                         data_buf = root_hub_str_index0;
1137                                         OK(len);
1138                                 }
1139                                 if(wValue==0x0301) {
1140                                         len = min_t(unsigned int,
1141                                                   leni,
1142                                                   min_t(unsigned int,
1143                                                       sizeof (root_hub_str_index1),
1144                                                       wLength));
1145                                         data_buf = root_hub_str_index1;
1146                                         OK(len);
1147                         }
1148                         default:
1149                                 stat = USB_ST_STALLED;
1150                 }
1151                 break;
1152
1153         case RH_GET_DESCRIPTOR | RH_CLASS:
1154             {
1155                     __u32 temp = roothub_a (&gohci);
1156
1157                     data_buf [0] = 9;           /* min length; */
1158                     data_buf [1] = 0x29;
1159                     data_buf [2] = temp & RH_A_NDP;
1160                     data_buf [3] = 0;
1161                     if (temp & RH_A_PSM)        /* per-port power switching? */
1162                         data_buf [3] |= 0x1;
1163                     if (temp & RH_A_NOCP)       /* no overcurrent reporting? */
1164                         data_buf [3] |= 0x10;
1165                     else if (temp & RH_A_OCPM)  /* per-port overcurrent reporting? */
1166                         data_buf [3] |= 0x8;
1167
1168                     /* corresponds to data_buf[4-7] */
1169                     datab [1] = 0;
1170                     data_buf [5] = (temp & RH_A_POTPGT) >> 24;
1171                     temp = roothub_b (&gohci);
1172                     data_buf [7] = temp & RH_B_DR;
1173                     if (data_buf [2] < 7) {
1174                         data_buf [8] = 0xff;
1175                     } else {
1176                         data_buf [0] += 2;
1177                         data_buf [8] = (temp & RH_B_DR) >> 8;
1178                         data_buf [10] = data_buf [9] = 0xff;
1179                     }
1180
1181                     len = min_t(unsigned int, leni,
1182                               min_t(unsigned int, data_buf [0], wLength));
1183                     OK (len);
1184                 }
1185
1186         case RH_GET_CONFIGURATION:      *(__u8 *) data_buf = 0x01; OK (1);
1187
1188         case RH_SET_CONFIGURATION:      WR_RH_STAT (0x10000); OK (0);
1189
1190         default:
1191                 dbg ("unsupported root hub command");
1192                 stat = USB_ST_STALLED;
1193         }
1194
1195 #ifdef  DEBUG
1196         ohci_dump_roothub (&gohci, 1);
1197 #endif
1198
1199         len = min_t(int, len, leni);
1200         if (data != data_buf)
1201             memcpy (data, data_buf, len);
1202         dev->act_len = len;
1203         dev->status = stat;
1204
1205 #ifdef DEBUG
1206         if (transfer_len)
1207                 urb_priv.actual_length = transfer_len;
1208         pkt_print(dev, pipe, buffer, transfer_len, cmd, "RET(rh)", 0/*usb_pipein(pipe)*/);
1209 #endif
1210
1211         return stat;
1212 }
1213
1214 /*-------------------------------------------------------------------------*/
1215
1216 /* common code for handling submit messages - used for all but root hub */
1217 /* accesses. */
1218 int submit_common_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1219                 int transfer_len, struct devrequest *setup, int interval)
1220 {
1221         int stat = 0;
1222         int maxsize = usb_maxpacket(dev, pipe);
1223         int timeout;
1224
1225         /* device pulled? Shortcut the action. */
1226         if (devgone == dev) {
1227                 dev->status = USB_ST_CRC_ERR;
1228                 return 0;
1229         }
1230
1231 #ifdef DEBUG
1232         urb_priv.actual_length = 0;
1233         pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB", usb_pipein(pipe));
1234 #endif
1235         if (!maxsize) {
1236                 err("submit_common_message: pipesize for pipe %lx is zero",
1237                         pipe);
1238                 return -1;
1239         }
1240
1241         if (sohci_submit_job(dev, pipe, buffer, transfer_len, setup, interval) < 0) {
1242                 err("sohci_submit_job failed");
1243                 return -1;
1244         }
1245
1246         /* allow more time for a BULK device to react - some are slow */
1247 #define BULK_TO  5000   /* timeout in milliseconds */
1248         if (usb_pipebulk(pipe))
1249                 timeout = BULK_TO;
1250         else
1251                 timeout = 100;
1252
1253         /* wait for it to complete */
1254         for (;;) {
1255                 /* check whether the controller is done */
1256                 stat = hc_interrupt();
1257                 if (stat < 0) {
1258                         stat = USB_ST_CRC_ERR;
1259                         break;
1260                 }
1261
1262                 /* NOTE: since we are not interrupt driven in U-Boot and always
1263                  * handle only one URB at a time, we cannot assume the
1264                  * transaction finished on the first successful return from
1265                  * hc_interrupt().. unless the flag for current URB is set,
1266                  * meaning that all TD's to/from device got actually
1267                  * transferred and processed. If the current URB is not
1268                  * finished we need to re-iterate this loop so as
1269                  * hc_interrupt() gets called again as there needs to be some
1270                  * more TD's to process still */
1271                 if ((stat >= 0) && (stat != 0xff) && (urb_finished)) {
1272                         /* 0xff is returned for an SF-interrupt */
1273                         break;
1274                 }
1275
1276                 if (--timeout) {
1277                         mdelay(1);
1278                         if (!urb_finished)
1279                                 dbg("\%");
1280
1281                 } else {
1282                         err("CTL:TIMEOUT ");
1283                         dbg("submit_common_msg: TO status %x\n", stat);
1284                         stat = USB_ST_CRC_ERR;
1285                         urb_finished = 1;
1286                         break;
1287                 }
1288         }
1289 #if 0
1290         /* we got an Root Hub Status Change interrupt */
1291         if (got_rhsc) {
1292 #ifdef DEBUG
1293                 ohci_dump_roothub (&gohci, 1);
1294 #endif
1295                 got_rhsc = 0;
1296                 /* abuse timeout */
1297                 timeout = rh_check_port_status(&gohci);
1298                 if (timeout >= 0) {
1299 #if 0 /* this does nothing useful, but leave it here in case that changes */
1300                         /* the called routine adds 1 to the passed value */
1301                         usb_hub_port_connect_change(gohci.rh.dev, timeout - 1);
1302 #endif
1303                         /*
1304                          * XXX
1305                          * This is potentially dangerous because it assumes
1306                          * that only one device is ever plugged in!
1307                          */
1308                         devgone = dev;
1309                 }
1310         }
1311 #endif
1312
1313         dev->status = stat;
1314         dev->act_len = transfer_len;
1315
1316 #ifdef DEBUG
1317         pkt_print(dev, pipe, buffer, transfer_len, setup, "RET(ctlr)", usb_pipein(pipe));
1318 #endif
1319
1320         /* free TDs in urb_priv */
1321         urb_free_priv (&urb_priv);
1322         return 0;
1323 }
1324
1325 /* submit routines called from usb.c */
1326 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1327                 int transfer_len)
1328 {
1329         info("submit_bulk_msg");
1330         return submit_common_msg(dev, pipe, buffer, transfer_len, NULL, 0);
1331 }
1332
1333 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1334                 int transfer_len, struct devrequest *setup)
1335 {
1336         int maxsize = usb_maxpacket(dev, pipe);
1337
1338         info("submit_control_msg");
1339 #ifdef DEBUG
1340         urb_priv.actual_length = 0;
1341         pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB", usb_pipein(pipe));
1342 #endif
1343         if (!maxsize) {
1344                 err("submit_control_message: pipesize for pipe %lx is zero",
1345                         pipe);
1346                 return -1;
1347         }
1348         if (((pipe >> 8) & 0x7f) == gohci.rh.devnum) {
1349                 gohci.rh.dev = dev;
1350                 /* root hub - redirect */
1351                 return ohci_submit_rh_msg(dev, pipe, buffer, transfer_len,
1352                         setup);
1353         }
1354
1355         return submit_common_msg(dev, pipe, buffer, transfer_len, setup, 0);
1356 }
1357
1358 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1359                 int transfer_len, int interval)
1360 {
1361         info("submit_int_msg");
1362         return -1;
1363 }
1364
1365 /*-------------------------------------------------------------------------*
1366  * HC functions
1367  *-------------------------------------------------------------------------*/
1368
1369 /* reset the HC and BUS */
1370
1371 static int hc_reset (ohci_t *ohci)
1372 {
1373         int timeout = 30;
1374         int smm_timeout = 50; /* 0,5 sec */
1375
1376         if (readl (&ohci->regs->control) & OHCI_CTRL_IR) { /* SMM owns the HC */
1377                 writel (OHCI_OCR, &ohci->regs->cmdstatus); /* request ownership */
1378                 info("USB HC TakeOver from SMM");
1379                 while (readl (&ohci->regs->control) & OHCI_CTRL_IR) {
1380                         mdelay (10);
1381                         if (--smm_timeout == 0) {
1382                                 err("USB HC TakeOver failed!");
1383                                 return -1;
1384                         }
1385                 }
1386         }
1387
1388         /* Disable HC interrupts */
1389         writel (OHCI_INTR_MIE, &ohci->regs->intrdisable);
1390
1391         dbg("USB HC reset_hc usb-%s: ctrl = 0x%X ;",
1392                 ohci->slot_name,
1393                 readl (&ohci->regs->control));
1394
1395         /* Reset USB (needed by some controllers) */
1396         ohci->hc_control = 0;
1397         writel (ohci->hc_control, &ohci->regs->control);
1398
1399         /* HC Reset requires max 10 us delay */
1400         writel (OHCI_HCR,  &ohci->regs->cmdstatus);
1401         while ((readl (&ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
1402                 if (--timeout == 0) {
1403                         err("USB HC reset timed out!");
1404                         return -1;
1405                 }
1406                 udelay (1);
1407         }
1408         return 0;
1409 }
1410
1411 /*-------------------------------------------------------------------------*/
1412
1413 /* Start an OHCI controller, set the BUS operational
1414  * enable interrupts
1415  * connect the virtual root hub */
1416
1417 static int hc_start (ohci_t * ohci)
1418 {
1419         __u32 mask;
1420         unsigned int fminterval;
1421
1422         ohci->disabled = 1;
1423
1424         /* Tell the controller where the control and bulk lists are
1425          * The lists are empty now. */
1426
1427         writel (0, &ohci->regs->ed_controlhead);
1428         writel (0, &ohci->regs->ed_bulkhead);
1429
1430         writel ((__u32)ohci->hcca, &ohci->regs->hcca); /* a reset clears this */
1431
1432         fminterval = 0x2edf;
1433         writel ((fminterval * 9) / 10, &ohci->regs->periodicstart);
1434         fminterval |= ((((fminterval - 210) * 6) / 7) << 16);
1435         writel (fminterval, &ohci->regs->fminterval);
1436         writel (0x628, &ohci->regs->lsthresh);
1437
1438         /* start controller operations */
1439         ohci->hc_control = OHCI_CONTROL_INIT | OHCI_USB_OPER;
1440         ohci->disabled = 0;
1441         writel (ohci->hc_control, &ohci->regs->control);
1442
1443         /* disable all interrupts */
1444         mask = (OHCI_INTR_SO | OHCI_INTR_WDH | OHCI_INTR_SF | OHCI_INTR_RD |
1445                         OHCI_INTR_UE | OHCI_INTR_FNO | OHCI_INTR_RHSC |
1446                         OHCI_INTR_OC | OHCI_INTR_MIE);
1447         writel (mask, &ohci->regs->intrdisable);
1448         /* clear all interrupts */
1449         mask &= ~OHCI_INTR_MIE;
1450         writel (mask, &ohci->regs->intrstatus);
1451         /* Choose the interrupts we care about now  - but w/o MIE */
1452         mask = OHCI_INTR_RHSC | OHCI_INTR_UE | OHCI_INTR_WDH | OHCI_INTR_SO;
1453         writel (mask, &ohci->regs->intrenable);
1454
1455 #ifdef  OHCI_USE_NPS
1456         /* required for AMD-756 and some Mac platforms */
1457         writel ((roothub_a (ohci) | RH_A_NPS) & ~RH_A_PSM,
1458                 &ohci->regs->roothub.a);
1459         writel (RH_HS_LPSC, &ohci->regs->roothub.status);
1460 #endif  /* OHCI_USE_NPS */
1461
1462         /* POTPGT delay is bits 24-31, in 2 ms units. */
1463         mdelay ((roothub_a (ohci) >> 23) & 0x1fe);
1464
1465         /* connect the virtual root hub */
1466         ohci->rh.devnum = 0;
1467
1468         return 0;
1469 }
1470
1471 /*-------------------------------------------------------------------------*/
1472
1473 /* an interrupt happens */
1474
1475 static int
1476 hc_interrupt (void)
1477 {
1478         ohci_t *ohci = &gohci;
1479         struct ohci_regs *regs = ohci->regs;
1480         int ints;
1481         int stat = -1;
1482
1483         if ((ohci->hcca->done_head != 0) &&
1484              !(ohci_cpu_to_le32(ohci->hcca->done_head) & 0x01)) {
1485
1486                 ints =  OHCI_INTR_WDH;
1487
1488         } else if ((ints = readl (&regs->intrstatus)) == ~(u32)0) {
1489                 ohci->disabled++;
1490                 err ("%s device removed!", ohci->slot_name);
1491                 return -1;
1492
1493         } else if ((ints &= readl (&regs->intrenable)) == 0) {
1494                 dbg("hc_interrupt: returning..\n");
1495                 return 0xff;
1496         }
1497
1498         /* dbg("Interrupt: %x frame: %x", ints, le16_to_cpu (ohci->hcca->frame_no)); */
1499
1500         if (ints & OHCI_INTR_RHSC) {
1501                 got_rhsc = 1;
1502                 stat = 0xff;
1503         }
1504
1505         if (ints & OHCI_INTR_UE) {
1506                 ohci->disabled++;
1507                 err ("OHCI Unrecoverable Error, controller usb-%s disabled",
1508                         ohci->slot_name);
1509                 /* e.g. due to PCI Master/Target Abort */
1510
1511 #ifdef  DEBUG
1512                 ohci_dump (ohci, 1);
1513 #endif
1514                 /* FIXME: be optimistic, hope that bug won't repeat often. */
1515                 /* Make some non-interrupt context restart the controller. */
1516                 /* Count and limit the retries though; either hardware or */
1517                 /* software errors can go forever... */
1518                 hc_reset (ohci);
1519                 return -1;
1520         }
1521
1522         if (ints & OHCI_INTR_WDH) {
1523                 writel (OHCI_INTR_WDH, &regs->intrdisable);
1524                 stat = dl_done_list (&gohci, dl_reverse_done_list (&gohci));
1525                 writel (OHCI_INTR_WDH, &regs->intrenable);
1526         }
1527
1528         if (ints & OHCI_INTR_SO) {
1529                 dbg("USB Schedule overrun\n");
1530                 writel (OHCI_INTR_SO, &regs->intrenable);
1531                 stat = -1;
1532         }
1533
1534         /* FIXME:  this assumes SOF (1/ms) interrupts don't get lost... */
1535         if (ints & OHCI_INTR_SF) {
1536                 unsigned int frame = ohci_cpu_to_le16 (ohci->hcca->frame_no) & 1;
1537                 mdelay(1);
1538                 writel (OHCI_INTR_SF, &regs->intrdisable);
1539                 if (ohci->ed_rm_list[frame] != NULL)
1540                         writel (OHCI_INTR_SF, &regs->intrenable);
1541                 stat = 0xff;
1542         }
1543
1544         writel (ints, &regs->intrstatus);
1545         return stat;
1546 }
1547
1548 /*-------------------------------------------------------------------------*/
1549
1550 /*-------------------------------------------------------------------------*/
1551
1552 /* De-allocate all resources.. */
1553
1554 static void hc_release_ohci (ohci_t *ohci)
1555 {
1556         dbg ("USB HC release ohci usb-%s", ohci->slot_name);
1557
1558         if (!ohci->disabled)
1559                 hc_reset (ohci);
1560 }
1561
1562 /*-------------------------------------------------------------------------*/
1563
1564 /*
1565  * low level initalisation routine, called from usb.c
1566  */
1567 static char ohci_inited = 0;
1568
1569 int usb_lowlevel_init(int index, void **controller)
1570 {
1571         memset (&gohci, 0, sizeof (ohci_t));
1572         memset (&urb_priv, 0, sizeof (urb_priv_t));
1573
1574         /* align the storage */
1575         if ((__u32)&ghcca[0] & 0xff) {
1576                 err("HCCA not aligned!!");
1577                 return -1;
1578         }
1579         phcca = &ghcca[0];
1580         info("aligned ghcca %p", phcca);
1581         memset(&ohci_dev, 0, sizeof(struct ohci_device));
1582         if ((__u32)&ohci_dev.ed[0] & 0x7) {
1583                 err("EDs not aligned!!");
1584                 return -1;
1585         }
1586         memset(gtd, 0, sizeof(td_t) * (NUM_TD + 1));
1587         if ((__u32)gtd & 0x7) {
1588                 err("TDs not aligned!!");
1589                 return -1;
1590         }
1591         ptd = gtd;
1592         gohci.hcca = phcca;
1593         memset (phcca, 0, sizeof (struct ohci_hcca));
1594
1595         gohci.disabled = 1;
1596         gohci.sleeping = 0;
1597         gohci.irq = -1;
1598 #if defined(CONFIG_440EP)
1599         gohci.regs = (struct ohci_regs *)(CONFIG_SYS_PERIPHERAL_BASE | 0x1000);
1600 #elif defined(CONFIG_440EPX) || defined(CONFIG_SYS_USB_HOST)
1601         gohci.regs = (struct ohci_regs *)(CONFIG_SYS_USB_HOST);
1602 #endif
1603
1604         gohci.flags = 0;
1605         gohci.slot_name = "ppc440";
1606
1607         if (hc_reset (&gohci) < 0) {
1608                 hc_release_ohci (&gohci);
1609                 return -1;
1610         }
1611
1612         if (hc_start (&gohci) < 0) {
1613                 err ("can't start usb-%s", gohci.slot_name);
1614                 hc_release_ohci (&gohci);
1615                 return -1;
1616         }
1617
1618 #ifdef  DEBUG
1619         ohci_dump (&gohci, 1);
1620 #endif
1621         ohci_inited = 1;
1622         urb_finished = 1;
1623
1624         return 0;
1625 }
1626
1627 int usb_lowlevel_stop(int index)
1628 {
1629         /* this gets called really early - before the controller has */
1630         /* even been initialized! */
1631         if (!ohci_inited)
1632                 return 0;
1633         /* TODO release any interrupts, etc. */
1634         /* call hc_release_ohci() here ? */
1635         hc_reset (&gohci);
1636         return 0;
1637 }
1638
1639 #endif /* CONFIG_USB_OHCI */