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 #include "usbdev.h"
  48
  49 #define OHCI_USE_NPS            /* force NoPowerSwitching mode */
  50 #undef OHCI_VERBOSE_DEBUG       /* not always helpful */
  51 #undef DEBUG
  52 #undef SHOW_INFO
  53 #undef OHCI_FILL_TRACE
  54
  55 /* For initializing controller (mask in an HCFS mode too) */
  56 #define OHCI_CONTROL_INIT \
  57         (OHCI_CTRL_CBSR & 0x3) | OHCI_CTRL_IE | OHCI_CTRL_PLE
  58
  59 #define readl(a) (*((volatile u32 *)(a)))
  60 #define writel(a, b) (*((volatile u32 *)(b)) = ((volatile u32)a))
  61
  62 #define min_t(type,x,y) ({ type __x = (x); type __y = (y); __x < __y ? __x: __y; })
  63
  64 #ifdef DEBUG
  65 #define dbg(format, arg...) printf("DEBUG: " format "\n", ## arg)
  66 #else
  67 #define dbg(format, arg...) do {} while(0)
  68 #endif /* DEBUG */
  69 #define err(format, arg...) printf("ERROR: " format "\n", ## arg)
  70 #ifdef SHOW_INFO
  71 #define info(format, arg...) printf("INFO: " format "\n", ## arg)
  72 #else
  73 #define info(format, arg...) do {} while(0)
  74 #endif
  75
  76 #define m16_swap(x) swap_16(x)
  77 #define m32_swap(x) swap_32(x)
  78
  79 #if defined(CONFIG_405EZ) || defined(CONFIG_440EP) || defined(CONFIG_440EPX)
  80 #define ohci_cpu_to_le16(x) (x)
  81 #define ohci_cpu_to_le32(x) (x)
  82 #else
  83 #define ohci_cpu_to_le16(x) swap_16(x)
  84 #define ohci_cpu_to_le32(x) swap_32(x)
  85 #endif
  86
  87 /* global ohci_t */
  88 static ohci_t gohci;
  89 /* this must be aligned to a 256 byte boundary */
  90 struct ohci_hcca ghcca[1];
  91 /* a pointer to the aligned storage */
  92 struct ohci_hcca *phcca;
  93 /* this allocates EDs for all possible endpoints */
  94 struct ohci_device ohci_dev;
  95 /* urb_priv */
  96 urb_priv_t urb_priv;
  97 /* RHSC flag */
  98 int got_rhsc;
  99 /* device which was disconnected */
 100 struct usb_device *devgone;
 101 /* flag guarding URB transation */
 102 int urb_finished = 0;
 103
 104 /*-------------------------------------------------------------------------*/
 105
 106 /* AMD-756 (D2 rev) reports corrupt register contents in some cases.
 107  * The erratum (#4) description is incorrect.  AMD's workaround waits
 108  * till some bits (mostly reserved) are clear; ok for all revs.
 109  */
 110 #define OHCI_QUIRK_AMD756 0xabcd
 111 #define read_roothub(hc, register, mask) ({ \
 112         u32 temp = readl (&hc->regs->roothub.register); \
 113         if (hc->flags & OHCI_QUIRK_AMD756) \
 114                 while (temp & mask) \
 115                         temp = readl (&hc->regs->roothub.register); \
 116         temp; })
 117
 118 static u32 roothub_a (struct ohci *hc)
 119         { return read_roothub (hc, a, 0xfc0fe000); }
 120 static inline u32 roothub_b (struct ohci *hc)
 121         { return readl (&hc->regs->roothub.b); }
 122 static inline u32 roothub_status (struct ohci *hc)
 123         { return readl (&hc->regs->roothub.status); }
 124 static u32 roothub_portstatus (struct ohci *hc, int i)
 125         { return read_roothub (hc, portstatus [i], 0xffe0fce0); }
 126
 127
 128 /* forward declaration */
 129 static int hc_interrupt (void);
 130 static void
 131 td_submit_job (struct usb_device * dev, unsigned long pipe, void * buffer,
 132         int transfer_len, struct devrequest * setup, urb_priv_t * urb, int interval);
 133
 134 /*-------------------------------------------------------------------------*
 135  * URB support functions
 136  *-------------------------------------------------------------------------*/
 137
 138 /* free HCD-private data associated with this URB */
 139
 140 static void urb_free_priv (urb_priv_t * urb)
 141 {
 142         int             i;
 143         int             last;
 144         struct td       * td;
 145
 146         last = urb->length - 1;
 147         if (last >= 0) {
 148                 for (i = 0; i <= last; i++) {
 149                         td = urb->td[i];
 150                         if (td) {
 151                                 td->usb_dev = NULL;
 152                                 urb->td[i] = NULL;
 153                         }
 154                 }
 155         }
 156 }
 157
 158 /*-------------------------------------------------------------------------*/
 159
 160 #ifdef DEBUG
 161 static int sohci_get_current_frame_number (struct usb_device * dev);
 162
 163 /* debug| print the main components of an URB
 164  * small: 0) header + data packets 1) just header */
 165
 166 static void pkt_print (struct usb_device * dev, unsigned long pipe, void * buffer,
 167         int transfer_len, struct devrequest * setup, char * str, int small)
 168 {
 169         urb_priv_t * purb = &urb_priv;
 170
 171         dbg("%s URB:[%4x] dev:%2d,ep:%2d-%c,type:%s,len:%d/%d stat:%#lx",
 172                         str,
 173                         sohci_get_current_frame_number (dev),
 174                         usb_pipedevice (pipe),
 175                         usb_pipeendpoint (pipe),
 176                         usb_pipeout (pipe)? 'O': 'I',
 177                         usb_pipetype (pipe) < 2? (usb_pipeint (pipe)? "INTR": "ISOC"):
 178                                 (usb_pipecontrol (pipe)? "CTRL": "BULK"),
 179                         purb->actual_length,
 180                         transfer_len, dev->status);
 181 #ifdef  OHCI_VERBOSE_DEBUG
 182         if (!small) {
 183                 int i, len;
 184
 185                 if (usb_pipecontrol (pipe)) {
 186                         printf (__FILE__ ": cmd(8):");
 187                         for (i = 0; i < 8 ; i++)
 188                                 printf (" %02x", ((__u8 *) setup) [i]);
 189                         printf ("\n");
 190                 }
 191                 if (transfer_len > 0 && buffer) {
 192                         printf (__FILE__ ": data(%d/%d):",
 193                                 purb->actual_length,
 194                                 transfer_len);
 195                         len = usb_pipeout (pipe)?
 196                                         transfer_len: purb->actual_length;
 197                         for (i = 0; i < 16 && i < len; i++)
 198                                 printf (" %02x", ((__u8 *) buffer) [i]);
 199                         printf ("%s\n", i < len? "...": "");
 200                 }
 201         }
 202 #endif
 203 }
 204
 205 /* just for debugging; prints non-empty branches of the int ed tree inclusive iso eds*/
 206 void ep_print_int_eds (ohci_t *ohci, char * str) {
 207         int i, j;
 208          __u32 * ed_p;
 209         for (i= 0; i < 32; i++) {
 210                 j = 5;
 211                 ed_p = &(ohci->hcca->int_table [i]);
 212                 if (*ed_p == 0)
 213                     continue;
 214                 printf (__FILE__ ": %s branch int %2d(%2x):", str, i, i);
 215                 while (*ed_p != 0 && j--) {
 216                         ed_t *ed = (ed_t *)ohci_cpu_to_le32(ed_p);
 217                         printf (" ed: %4x;", ed->hwINFO);
 218                         ed_p = &ed->hwNextED;
 219                 }
 220                 printf ("\n");
 221         }
 222 }
 223
 224 static void ohci_dump_intr_mask (char *label, __u32 mask)
 225 {
 226         dbg ("%s: 0x%08x%s%s%s%s%s%s%s%s%s",
 227                 label,
 228                 mask,
 229                 (mask & OHCI_INTR_MIE) ? " MIE" : "",
 230                 (mask & OHCI_INTR_OC) ? " OC" : "",
 231                 (mask & OHCI_INTR_RHSC) ? " RHSC" : "",
 232                 (mask & OHCI_INTR_FNO) ? " FNO" : "",
 233                 (mask & OHCI_INTR_UE) ? " UE" : "",
 234                 (mask & OHCI_INTR_RD) ? " RD" : "",
 235                 (mask & OHCI_INTR_SF) ? " SF" : "",
 236                 (mask & OHCI_INTR_WDH) ? " WDH" : "",
 237                 (mask & OHCI_INTR_SO) ? " SO" : ""
 238                 );
 239 }
 240
 241 static void maybe_print_eds (char *label, __u32 value)
 242 {
 243         ed_t *edp = (ed_t *)value;
 244
 245         if (value) {
 246                 dbg ("%s %08x", label, value);
 247                 dbg ("%08x", edp->hwINFO);
 248                 dbg ("%08x", edp->hwTailP);
 249                 dbg ("%08x", edp->hwHeadP);
 250                 dbg ("%08x", edp->hwNextED);
 251         }
 252 }
 253
 254 static char * hcfs2string (int state)
 255 {
 256         switch (state) {
 257                 case OHCI_USB_RESET:    return "reset";
 258                 case OHCI_USB_RESUME:   return "resume";
 259                 case OHCI_USB_OPER:     return "operational";
 260                 case OHCI_USB_SUSPEND:  return "suspend";
 261         }
 262         return "?";
 263 }
 264
 265 /* dump control and status registers */
 266 static void ohci_dump_status (ohci_t *controller)
 267 {
 268         struct ohci_regs        *regs = controller->regs;
 269         __u32                   temp;
 270
 271         temp = readl (&regs->revision) & 0xff;
 272         if (temp != 0x10)
 273                 dbg ("spec %d.%d", (temp >> 4), (temp & 0x0f));
 274
 275         temp = readl (&regs->control);
 276         dbg ("control: 0x%08x%s%s%s HCFS=%s%s%s%s%s CBSR=%d", temp,
 277                 (temp & OHCI_CTRL_RWE) ? " RWE" : "",
 278                 (temp & OHCI_CTRL_RWC) ? " RWC" : "",
 279                 (temp & OHCI_CTRL_IR) ? " IR" : "",
 280                 hcfs2string (temp & OHCI_CTRL_HCFS),
 281                 (temp & OHCI_CTRL_BLE) ? " BLE" : "",
 282                 (temp & OHCI_CTRL_CLE) ? " CLE" : "",
 283                 (temp & OHCI_CTRL_IE) ? " IE" : "",
 284                 (temp & OHCI_CTRL_PLE) ? " PLE" : "",
 285                 temp & OHCI_CTRL_CBSR
 286                 );
 287
 288         temp = readl (&regs->cmdstatus);
 289         dbg ("cmdstatus: 0x%08x SOC=%d%s%s%s%s", temp,
 290                 (temp & OHCI_SOC) >> 16,
 291                 (temp & OHCI_OCR) ? " OCR" : "",
 292                 (temp & OHCI_BLF) ? " BLF" : "",
 293                 (temp & OHCI_CLF) ? " CLF" : "",
 294                 (temp & OHCI_HCR) ? " HCR" : ""
 295                 );
 296
 297         ohci_dump_intr_mask ("intrstatus", readl (&regs->intrstatus));
 298         ohci_dump_intr_mask ("intrenable", readl (&regs->intrenable));
 299
 300         maybe_print_eds ("ed_periodcurrent", readl (&regs->ed_periodcurrent));
 301
 302         maybe_print_eds ("ed_controlhead", readl (&regs->ed_controlhead));
 303         maybe_print_eds ("ed_controlcurrent", readl (&regs->ed_controlcurrent));
 304
 305         maybe_print_eds ("ed_bulkhead", readl (&regs->ed_bulkhead));
 306         maybe_print_eds ("ed_bulkcurrent", readl (&regs->ed_bulkcurrent));
 307
 308         maybe_print_eds ("donehead", readl (&regs->donehead));
 309 }
 310
 311 static void ohci_dump_roothub (ohci_t *controller, int verbose)
 312 {
 313         __u32                   temp, ndp, i;
 314
 315         temp = roothub_a (controller);
 316         ndp = (temp & RH_A_NDP);
 317
 318         if (verbose) {
 319                 dbg ("roothub.a: %08x POTPGT=%d%s%s%s%s%s NDP=%d", temp,
 320                         ((temp & RH_A_POTPGT) >> 24) & 0xff,
 321                         (temp & RH_A_NOCP) ? " NOCP" : "",
 322                         (temp & RH_A_OCPM) ? " OCPM" : "",
 323                         (temp & RH_A_DT) ? " DT" : "",
 324                         (temp & RH_A_NPS) ? " NPS" : "",
 325                         (temp & RH_A_PSM) ? " PSM" : "",
 326                         ndp
 327                         );
 328                 temp = roothub_b (controller);
 329                 dbg ("roothub.b: %08x PPCM=%04x DR=%04x",
 330                         temp,
 331                         (temp & RH_B_PPCM) >> 16,
 332                         (temp & RH_B_DR)
 333                         );
 334                 temp = roothub_status (controller);
 335                 dbg ("roothub.status: %08x%s%s%s%s%s%s",
 336                         temp,
 337                         (temp & RH_HS_CRWE) ? " CRWE" : "",
 338                         (temp & RH_HS_OCIC) ? " OCIC" : "",
 339                         (temp & RH_HS_LPSC) ? " LPSC" : "",
 340                         (temp & RH_HS_DRWE) ? " DRWE" : "",
 341                         (temp & RH_HS_OCI) ? " OCI" : "",
 342                         (temp & RH_HS_LPS) ? " LPS" : ""
 343                         );
 344         }
 345
 346         for (i = 0; i < ndp; i++) {
 347                 temp = roothub_portstatus (controller, i);
 348                 dbg ("roothub.portstatus [%d] = 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s",
 349                         i,
 350                         temp,
 351                         (temp & RH_PS_PRSC) ? " PRSC" : "",
 352                         (temp & RH_PS_OCIC) ? " OCIC" : "",
 353                         (temp & RH_PS_PSSC) ? " PSSC" : "",
 354                         (temp & RH_PS_PESC) ? " PESC" : "",
 355                         (temp & RH_PS_CSC) ? " CSC" : "",
 356
 357                         (temp & RH_PS_LSDA) ? " LSDA" : "",
 358                         (temp & RH_PS_PPS) ? " PPS" : "",
 359                         (temp & RH_PS_PRS) ? " PRS" : "",
 360                         (temp & RH_PS_POCI) ? " POCI" : "",
 361                         (temp & RH_PS_PSS) ? " PSS" : "",
 362
 363                         (temp & RH_PS_PES) ? " PES" : "",
 364                         (temp & RH_PS_CCS) ? " CCS" : ""
 365                         );
 366         }
 367 }
 368
 369 static void ohci_dump (ohci_t *controller, int verbose)
 370 {
 371         dbg ("OHCI controller usb-%s state", controller->slot_name);
 372
 373         /* dumps some of the state we know about */
 374         ohci_dump_status (controller);
 375         if (verbose)
 376                 ep_print_int_eds (controller, "hcca");
 377         dbg ("hcca frame #%04x", controller->hcca->frame_no);
 378         ohci_dump_roothub (controller, 1);
 379 }
 380
 381
 382 #endif /* DEBUG */
 383
 384 /*-------------------------------------------------------------------------*
 385  * Interface functions (URB)
 386  *-------------------------------------------------------------------------*/
 387
 388 /* get a transfer request */
 389
 390 int sohci_submit_job(struct usb_device *dev, unsigned long pipe, void *buffer,
 391                 int transfer_len, struct devrequest *setup, int interval)
 392 {
 393         ohci_t *ohci;
 394         ed_t * ed;
 395         urb_priv_t *purb_priv;
 396         int i, size = 0;
 397
 398         ohci = &gohci;
 399
 400         /* when controller's hung, permit only roothub cleanup attempts
 401          * such as powering down ports */
 402         if (ohci->disabled) {
 403                 err("sohci_submit_job: EPIPE");
 404                 return -1;
 405         }
 406
 407         /* if we have an unfinished URB from previous transaction let's
 408          * fail and scream as quickly as possible so as not to corrupt
 409          * further communication */
 410         if (!urb_finished) {
 411                 err("sohci_submit_job: URB NOT FINISHED");
 412                 return -1;
 413         }
 414         /* we're about to begin a new transaction here so mark the URB unfinished */
 415         urb_finished = 0;
 416
 417         /* every endpoint has a ed, locate and fill it */
 418         if (!(ed = ep_add_ed (dev, pipe))) {
 419                 err("sohci_submit_job: ENOMEM");
 420                 return -1;
 421         }
 422
 423         /* for the private part of the URB we need the number of TDs (size) */
 424         switch (usb_pipetype (pipe)) {
 425                 case PIPE_BULK: /* one TD for every 4096 Byte */
 426                         size = (transfer_len - 1) / 4096 + 1;
 427                         break;
 428                 case PIPE_CONTROL: /* 1 TD for setup, 1 for ACK and 1 for every 4096 B */
 429                         size = (transfer_len == 0)? 2:
 430                                                 (transfer_len - 1) / 4096 + 3;
 431                         break;
 432         }
 433
 434         if (size >= (N_URB_TD - 1)) {
 435                 err("need %d TDs, only have %d", size, N_URB_TD);
 436                 return -1;
 437         }
 438         purb_priv = &urb_priv;
 439         purb_priv->pipe = pipe;
 440
 441         /* fill the private part of the URB */
 442         purb_priv->length = size;
 443         purb_priv->ed = ed;
 444         purb_priv->actual_length = 0;
 445
 446         /* allocate the TDs */
 447         /* note that td[0] was allocated in ep_add_ed */
 448         for (i = 0; i < size; i++) {
 449                 purb_priv->td[i] = td_alloc (dev);
 450                 if (!purb_priv->td[i]) {
 451                         purb_priv->length = i;
 452                         urb_free_priv (purb_priv);
 453                         err("sohci_submit_job: ENOMEM");
 454                         return -1;
 455                 }
 456         }
 457
 458         if (ed->state == ED_NEW || (ed->state & ED_DEL)) {
 459                 urb_free_priv (purb_priv);
 460                 err("sohci_submit_job: EINVAL");
 461                 return -1;
 462         }
 463
 464         /* link the ed into a chain if is not already */
 465         if (ed->state != ED_OPER)
 466                 ep_link (ohci, ed);
 467
 468         /* fill the TDs and link it to the ed */
 469         td_submit_job(dev, pipe, buffer, transfer_len, setup, purb_priv, interval);
 470
 471         return 0;
 472 }
 473
 474 /*-------------------------------------------------------------------------*/
 475
 476 #ifdef DEBUG
 477 /* tell us the current USB frame number */
 478
 479 static int sohci_get_current_frame_number (struct usb_device *usb_dev)
 480 {
 481         ohci_t *ohci = &gohci;
 482
 483         return ohci_cpu_to_le16 (ohci->hcca->frame_no);
 484 }
 485 #endif
 486
 487 /*-------------------------------------------------------------------------*
 488  * ED handling functions
 489  *-------------------------------------------------------------------------*/
 490
 491 /* link an ed into one of the HC chains */
 492
 493 static int ep_link (ohci_t *ohci, ed_t *edi)
 494 {
 495         volatile ed_t *ed = edi;
 496
 497         ed->state = ED_OPER;
 498
 499         switch (ed->type) {
 500         case PIPE_CONTROL:
 501                 ed->hwNextED = 0;
 502                 if (ohci->ed_controltail == NULL) {
 503                         writel (ed, &ohci->regs->ed_controlhead);
 504                 } else {
 505                         ohci->ed_controltail->hwNextED = ohci_cpu_to_le32 ((unsigned long)ed);
 506                 }
 507                 ed->ed_prev = ohci->ed_controltail;
 508                 if (!ohci->ed_controltail && !ohci->ed_rm_list[0] &&
 509                         !ohci->ed_rm_list[1] && !ohci->sleeping) {
 510                         ohci->hc_control |= OHCI_CTRL_CLE;
 511                         writel (ohci->hc_control, &ohci->regs->control);
 512                 }
 513                 ohci->ed_controltail = edi;
 514                 break;
 515
 516         case PIPE_BULK:
 517                 ed->hwNextED = 0;
 518                 if (ohci->ed_bulktail == NULL) {
 519                         writel (ed, &ohci->regs->ed_bulkhead);
 520                 } else {
 521                         ohci->ed_bulktail->hwNextED = ohci_cpu_to_le32 ((unsigned long)ed);
 522                 }
 523                 ed->ed_prev = ohci->ed_bulktail;
 524                 if (!ohci->ed_bulktail && !ohci->ed_rm_list[0] &&
 525                         !ohci->ed_rm_list[1] && !ohci->sleeping) {
 526                         ohci->hc_control |= OHCI_CTRL_BLE;
 527                         writel (ohci->hc_control, &ohci->regs->control);
 528                 }
 529                 ohci->ed_bulktail = edi;
 530                 break;
 531         }
 532         return 0;
 533 }
 534
 535 /*-------------------------------------------------------------------------*/
 536
 537 /* unlink an ed from one of the HC chains.
 538  * just the link to the ed is unlinked.
 539  * the link from the ed still points to another operational ed or 0
 540  * so the HC can eventually finish the processing of the unlinked ed */
 541
 542 static int ep_unlink (ohci_t *ohci, ed_t *edi)
 543 {
 544         volatile ed_t *ed = edi;
 545
 546         ed->hwINFO |= ohci_cpu_to_le32 (OHCI_ED_SKIP);
 547
 548         switch (ed->type) {
 549         case PIPE_CONTROL:
 550                 if (ed->ed_prev == NULL) {
 551                         if (!ed->hwNextED) {
 552                                 ohci->hc_control &= ~OHCI_CTRL_CLE;
 553                                 writel (ohci->hc_control, &ohci->regs->control);
 554                         }
 555                         writel (ohci_cpu_to_le32 (*((__u32 *)&ed->hwNextED)), &ohci->regs->ed_controlhead);
 556                 } else {
 557                         ed->ed_prev->hwNextED = ed->hwNextED;
 558                 }
 559                 if (ohci->ed_controltail == ed) {
 560                         ohci->ed_controltail = ed->ed_prev;
 561                 } else {
 562                         ((ed_t *)ohci_cpu_to_le32 (*((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
 563                 }
 564                 break;
 565
 566         case PIPE_BULK:
 567                 if (ed->ed_prev == NULL) {
 568                         if (!ed->hwNextED) {
 569                                 ohci->hc_control &= ~OHCI_CTRL_BLE;
 570                                 writel (ohci->hc_control, &ohci->regs->control);
 571                         }
 572                         writel (ohci_cpu_to_le32 (*((__u32 *)&ed->hwNextED)), &ohci->regs->ed_bulkhead);
 573                 } else {
 574                         ed->ed_prev->hwNextED = ed->hwNextED;
 575                 }
 576                 if (ohci->ed_bulktail == ed) {
 577                         ohci->ed_bulktail = ed->ed_prev;
 578                 } else {
 579                         ((ed_t *)ohci_cpu_to_le32 (*((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
 580                 }
 581                 break;
 582         }
 583         ed->state = ED_UNLINK;
 584         return 0;
 585 }
 586
 587
 588 /*-------------------------------------------------------------------------*/
 589
 590 /* add/reinit an endpoint; this should be done once at the usb_set_configuration command,
 591  * but the USB stack is a little bit stateless  so we do it at every transaction
 592  * if the state of the ed is ED_NEW then a dummy td is added and the state is changed to ED_UNLINK
 593  * in all other cases the state is left unchanged
 594  * the ed info fields are setted anyway even though most of them should not change */
 595
 596 static ed_t * ep_add_ed (struct usb_device *usb_dev, unsigned long pipe)
 597 {
 598         td_t *td;
 599         ed_t *ed_ret;
 600         volatile ed_t *ed;
 601
 602         ed = ed_ret = &ohci_dev.ed[(usb_pipeendpoint (pipe) << 1) |
 603                         (usb_pipecontrol (pipe)? 0: usb_pipeout (pipe))];
 604
 605         if ((ed->state & ED_DEL) || (ed->state & ED_URB_DEL)) {
 606                 err("ep_add_ed: pending delete");
 607                 /* pending delete request */
 608                 return NULL;
 609         }
 610
 611         if (ed->state == ED_NEW) {
 612                 ed->hwINFO = ohci_cpu_to_le32 (OHCI_ED_SKIP); /* skip ed */
 613                 /* dummy td; end of td list for ed */
 614                 td = td_alloc (usb_dev);
 615                 ed->hwTailP = ohci_cpu_to_le32 ((unsigned long)td);
 616                 ed->hwHeadP = ed->hwTailP;
 617                 ed->state = ED_UNLINK;
 618                 ed->type = usb_pipetype (pipe);
 619                 ohci_dev.ed_cnt++;
 620         }
 621
 622         ed->hwINFO = ohci_cpu_to_le32 (usb_pipedevice (pipe)
 623                         | usb_pipeendpoint (pipe) << 7
 624                         | (usb_pipeisoc (pipe)? 0x8000: 0)
 625                         | (usb_pipecontrol (pipe)? 0: (usb_pipeout (pipe)? 0x800: 0x1000))
 626                         | usb_pipeslow (pipe) << 13
 627                         | usb_maxpacket (usb_dev, pipe) << 16);
 628
 629         return ed_ret;
 630 }
 631
 632 /*-------------------------------------------------------------------------*
 633  * TD handling functions
 634  *-------------------------------------------------------------------------*/
 635
 636 /* enqueue next TD for this URB (OHCI spec 5.2.8.2) */
 637
 638 static void td_fill (ohci_t *ohci, unsigned int info,
 639         void *data, int len,
 640         struct usb_device *dev, int index, urb_priv_t *urb_priv)
 641 {
 642         volatile td_t  *td, *td_pt;
 643 #ifdef OHCI_FILL_TRACE
 644         int i;
 645 #endif
 646
 647         if (index > urb_priv->length) {
 648                 err("index > length");
 649                 return;
 650         }
 651         /* use this td as the next dummy */
 652         td_pt = urb_priv->td [index];
 653         td_pt->hwNextTD = 0;
 654
 655         /* fill the old dummy TD */
 656         td = urb_priv->td [index] = (td_t *)(ohci_cpu_to_le32 (urb_priv->ed->hwTailP) & ~0xf);
 657
 658         td->ed = urb_priv->ed;
 659         td->next_dl_td = NULL;
 660         td->index = index;
 661         td->data = (__u32)data;
 662 #ifdef OHCI_FILL_TRACE
 663         if (usb_pipebulk(urb_priv->pipe) && usb_pipeout(urb_priv->pipe)) {
 664                 for (i = 0; i < len; i++)
 665                 printf("td->data[%d] %#2x ",i, ((unsigned char *)td->data)[i]);
 666                 printf("\n");
 667         }
 668 #endif
 669         if (!len)
 670                 data = 0;
 671
 672         td->hwINFO = ohci_cpu_to_le32 (info);
 673         td->hwCBP = ohci_cpu_to_le32 ((unsigned long)data);
 674         if (data)
 675                 td->hwBE = ohci_cpu_to_le32 ((unsigned long)(data + len - 1));
 676         else
 677                 td->hwBE = 0;
 678         td->hwNextTD = ohci_cpu_to_le32 ((unsigned long)td_pt);
 679
 680         /* append to queue */
 681         td->ed->hwTailP = td->hwNextTD;
 682 }
 683
 684 /*-------------------------------------------------------------------------*/
 685
 686 /* prepare all TDs of a transfer */
 687 static void td_submit_job (struct usb_device *dev, unsigned long pipe, void *buffer,
 688         int transfer_len, struct devrequest *setup, urb_priv_t *urb, int interval)
 689 {
 690         ohci_t *ohci = &gohci;
 691         int data_len = transfer_len;
 692         void *data;
 693         int cnt = 0;
 694         __u32 info = 0;
 695         unsigned int toggle = 0;
 696
 697         /* OHCI handles the DATA-toggles itself, we just use the USB-toggle bits for reseting */
 698         if(usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe))) {
 699                 toggle = TD_T_TOGGLE;
 700         } else {
 701                 toggle = TD_T_DATA0;
 702                 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 1);
 703         }
 704         urb->td_cnt = 0;
 705         if (data_len)
 706                 data = buffer;
 707         else
 708                 data = 0;
 709
 710         switch (usb_pipetype (pipe)) {
 711         case PIPE_BULK:
 712                 info = usb_pipeout (pipe)?
 713                         TD_CC | TD_DP_OUT : TD_CC | TD_DP_IN ;
 714                 while(data_len > 4096) {
 715                         td_fill (ohci, info | (cnt? TD_T_TOGGLE:toggle), data, 4096, dev, cnt, urb);
 716                         data += 4096; data_len -= 4096; cnt++;
 717                 }
 718                 info = usb_pipeout (pipe)?
 719                         TD_CC | TD_DP_OUT : TD_CC | TD_R | TD_DP_IN ;
 720                 td_fill (ohci, info | (cnt? TD_T_TOGGLE:toggle), data, data_len, dev, cnt, urb);
 721                 cnt++;
 722
 723                 if (!ohci->sleeping)
 724                         writel (OHCI_BLF, &ohci->regs->cmdstatus); /* start bulk list */
 725                 break;
 726
 727         case PIPE_CONTROL:
 728                 info = TD_CC | TD_DP_SETUP | TD_T_DATA0;
 729                 td_fill (ohci, info, setup, 8, dev, cnt++, urb);
 730                 if (data_len > 0) {
 731                         info = usb_pipeout (pipe)?
 732                                 TD_CC | TD_R | TD_DP_OUT | TD_T_DATA1 : TD_CC | TD_R | TD_DP_IN | TD_T_DATA1;
 733                         /* NOTE:  mishandles transfers >8K, some >4K */
 734                         td_fill (ohci, info, data, data_len, dev, cnt++, urb);
 735                 }
 736                 info = usb_pipeout (pipe)?
 737                         TD_CC | TD_DP_IN | TD_T_DATA1: TD_CC | TD_DP_OUT | TD_T_DATA1;
 738                 td_fill (ohci, info, data, 0, dev, cnt++, urb);
 739                 if (!ohci->sleeping)
 740                         writel (OHCI_CLF, &ohci->regs->cmdstatus); /* start Control list */
 741                 break;
 742         }
 743         if (urb->length != cnt)
 744                 dbg("TD LENGTH %d != CNT %d", urb->length, cnt);
 745 }
 746
 747 /*-------------------------------------------------------------------------*
 748  * Done List handling functions
 749  *-------------------------------------------------------------------------*/
 750
 751
 752 /* calculate the transfer length and update the urb */
 753
 754 static void dl_transfer_length(td_t * td)
 755 {
 756         __u32 tdBE, tdCBP;
 757         urb_priv_t *lurb_priv = &urb_priv;
 758
 759         tdBE   = ohci_cpu_to_le32 (td->hwBE);
 760         tdCBP  = ohci_cpu_to_le32 (td->hwCBP);
 761
 762
 763         if (!(usb_pipecontrol(lurb_priv->pipe) &&
 764             ((td->index == 0) || (td->index == lurb_priv->length - 1)))) {
 765                 if (tdBE != 0) {
 766                         if (td->hwCBP == 0)
 767                                 lurb_priv->actual_length += tdBE - td->data + 1;
 768                         else
 769                                 lurb_priv->actual_length += tdCBP - td->data;
 770                 }
 771         }
 772 }
 773
 774 /*-------------------------------------------------------------------------*/
 775
 776 /* replies to the request have to be on a FIFO basis so
 777  * we reverse the reversed done-list */
 778
 779 static td_t * dl_reverse_done_list (ohci_t *ohci)
 780 {
 781         __u32 td_list_hc;
 782         td_t *td_rev = NULL;
 783         td_t *td_list = NULL;
 784         urb_priv_t *lurb_priv = NULL;
 785
 786         td_list_hc = ohci_cpu_to_le32 (ohci->hcca->done_head) & 0xfffffff0;
 787         ohci->hcca->done_head = 0;
 788
 789         while (td_list_hc) {
 790                 td_list = (td_t *)td_list_hc;
 791
 792                 if (TD_CC_GET (ohci_cpu_to_le32 (td_list->hwINFO))) {
 793                         lurb_priv = &urb_priv;
 794                         dbg(" USB-error/status: %x : %p",
 795                                         TD_CC_GET (ohci_cpu_to_le32 (td_list->hwINFO)), td_list);
 796                         if (td_list->ed->hwHeadP & ohci_cpu_to_le32 (0x1)) {
 797                                 if (lurb_priv && ((td_list->index + 1) < lurb_priv->length)) {
 798                                         td_list->ed->hwHeadP =
 799                                                 (lurb_priv->td[lurb_priv->length - 1]->hwNextTD & ohci_cpu_to_le32 (0xfffffff0)) |
 800                                                                         (td_list->ed->hwHeadP & ohci_cpu_to_le32 (0x2));
 801                                         lurb_priv->td_cnt += lurb_priv->length - td_list->index - 1;
 802                                 } else
 803                                         td_list->ed->hwHeadP &= ohci_cpu_to_le32 (0xfffffff2);
 804                         }
 805 #ifdef CONFIG_MPC5200
 806                         td_list->hwNextTD = 0;
 807 #endif
 808                 }
 809
 810                 td_list->next_dl_td = td_rev;
 811                 td_rev = td_list;
 812                 td_list_hc = ohci_cpu_to_le32 (td_list->hwNextTD) & 0xfffffff0;
 813         }
 814         return td_list;
 815 }
 816
 817 /*-------------------------------------------------------------------------*/
 818
 819 /* td done list */
 820 static int dl_done_list (ohci_t *ohci, td_t *td_list)
 821 {
 822         td_t *td_list_next = NULL;
 823         ed_t *ed;
 824         int cc = 0;
 825         int stat = 0;
 826         /* urb_t *urb; */
 827         urb_priv_t *lurb_priv;
 828         __u32 tdINFO, edHeadP, edTailP;
 829
 830         while (td_list) {
 831                 td_list_next = td_list->next_dl_td;
 832
 833                 lurb_priv = &urb_priv;
 834                 tdINFO = ohci_cpu_to_le32 (td_list->hwINFO);
 835
 836                 ed = td_list->ed;
 837
 838                 dl_transfer_length(td_list);
 839
 840                 /* error code of transfer */
 841                 cc = TD_CC_GET (tdINFO);
 842                 if (++(lurb_priv->td_cnt) == lurb_priv->length) {
 843                         if ((ed->state & (ED_OPER | ED_UNLINK))
 844                                         && (lurb_priv->state != URB_DEL)) {
 845                                 dbg("ConditionCode %#x", cc);
 846                                 stat = cc_to_error[cc];
 847                                 urb_finished = 1;
 848                         }
 849                 }
 850
 851                 if (ed->state != ED_NEW) {
 852                         edHeadP = ohci_cpu_to_le32 (ed->hwHeadP) & 0xfffffff0;
 853                         edTailP = ohci_cpu_to_le32 (ed->hwTailP);
 854
 855                         /* unlink eds if they are not busy */
 856                         if ((edHeadP == edTailP) && (ed->state == ED_OPER))
 857                                 ep_unlink (ohci, ed);
 858                 }
 859
 860                 td_list = td_list_next;
 861         }
 862         return stat;
 863 }
 864
 865 /*-------------------------------------------------------------------------*
 866  * Virtual Root Hub
 867  *-------------------------------------------------------------------------*/
 868
 869 /* Device descriptor */
 870 static __u8 root_hub_dev_des[] =
 871 {
 872         0x12,       /*  __u8  bLength; */
 873         0x01,       /*  __u8  bDescriptorType; Device */
 874         0x10,       /*  __u16 bcdUSB; v1.1 */
 875         0x01,
 876         0x09,       /*  __u8  bDeviceClass; HUB_CLASSCODE */
 877         0x00,       /*  __u8  bDeviceSubClass; */
 878         0x00,       /*  __u8  bDeviceProtocol; */
 879         0x08,       /*  __u8  bMaxPacketSize0; 8 Bytes */
 880         0x00,       /*  __u16 idVendor; */
 881         0x00,
 882         0x00,       /*  __u16 idProduct; */
 883         0x00,
 884         0x00,       /*  __u16 bcdDevice; */
 885         0x00,
 886         0x00,       /*  __u8  iManufacturer; */
 887         0x01,       /*  __u8  iProduct; */
 888         0x00,       /*  __u8  iSerialNumber; */
 889         0x01        /*  __u8  bNumConfigurations; */
 890 };
 891
 892
 893 /* Configuration descriptor */
 894 static __u8 root_hub_config_des[] =
 895 {
 896         0x09,       /*  __u8  bLength; */
 897         0x02,       /*  __u8  bDescriptorType; Configuration */
 898         0x19,       /*  __u16 wTotalLength; */
 899         0x00,
 900         0x01,       /*  __u8  bNumInterfaces; */
 901         0x01,       /*  __u8  bConfigurationValue; */
 902         0x00,       /*  __u8  iConfiguration; */
 903         0x40,       /*  __u8  bmAttributes;
 904                  Bit 7: Bus-powered, 6: Self-powered, 5 Remote-wakwup, 4..0: resvd */
 905         0x00,       /*  __u8  MaxPower; */
 906
 907         /* interface */
 908         0x09,       /*  __u8  if_bLength; */
 909         0x04,       /*  __u8  if_bDescriptorType; Interface */
 910         0x00,       /*  __u8  if_bInterfaceNumber; */
 911         0x00,       /*  __u8  if_bAlternateSetting; */
 912         0x01,       /*  __u8  if_bNumEndpoints; */
 913         0x09,       /*  __u8  if_bInterfaceClass; HUB_CLASSCODE */
 914         0x00,       /*  __u8  if_bInterfaceSubClass; */
 915         0x00,       /*  __u8  if_bInterfaceProtocol; */
 916         0x00,       /*  __u8  if_iInterface; */
 917
 918         /* endpoint */
 919         0x07,       /*  __u8  ep_bLength; */
 920         0x05,       /*  __u8  ep_bDescriptorType; Endpoint */
 921         0x81,       /*  __u8  ep_bEndpointAddress; IN Endpoint 1 */
 922         0x03,       /*  __u8  ep_bmAttributes; Interrupt */
 923         0x02,       /*  __u16 ep_wMaxPacketSize; ((MAX_ROOT_PORTS + 1) / 8 */
 924         0x00,
 925         0xff        /*  __u8  ep_bInterval; 255 ms */
 926 };
 927
 928 static unsigned char root_hub_str_index0[] =
 929 {
 930         0x04,                   /*  __u8  bLength; */
 931         0x03,                   /*  __u8  bDescriptorType; String-descriptor */
 932         0x09,                   /*  __u8  lang ID */
 933         0x04,                   /*  __u8  lang ID */
 934 };
 935
 936 static unsigned char root_hub_str_index1[] =
 937 {
 938         28,                     /*  __u8  bLength; */
 939         0x03,                   /*  __u8  bDescriptorType; String-descriptor */
 940         'O',                    /*  __u8  Unicode */
 941         0,                              /*  __u8  Unicode */
 942         'H',                    /*  __u8  Unicode */
 943         0,                              /*  __u8  Unicode */
 944         'C',                    /*  __u8  Unicode */
 945         0,                              /*  __u8  Unicode */
 946         'I',                    /*  __u8  Unicode */
 947         0,                              /*  __u8  Unicode */
 948         ' ',                    /*  __u8  Unicode */
 949         0,                              /*  __u8  Unicode */
 950         'R',                    /*  __u8  Unicode */
 951         0,                              /*  __u8  Unicode */
 952         'o',                    /*  __u8  Unicode */
 953         0,                              /*  __u8  Unicode */
 954         'o',                    /*  __u8  Unicode */
 955         0,                              /*  __u8  Unicode */
 956         't',                    /*  __u8  Unicode */
 957         0,                              /*  __u8  Unicode */
 958         ' ',                    /*  __u8  Unicode */
 959         0,                              /*  __u8  Unicode */
 960         'H',                    /*  __u8  Unicode */
 961         0,                              /*  __u8  Unicode */
 962         'u',                    /*  __u8  Unicode */
 963         0,                              /*  __u8  Unicode */
 964         'b',                    /*  __u8  Unicode */
 965         0,                              /*  __u8  Unicode */
 966 };
 967
 968 /* Hub class-specific descriptor is constructed dynamically */
 969
 970
 971 /*-------------------------------------------------------------------------*/
 972
 973 #define OK(x)                   len = (x); break
 974 #ifdef DEBUG
 975 #define WR_RH_STAT(x)           {info("WR:status %#8x", (x));writel((x), &gohci.regs->roothub.status);}
 976 #define WR_RH_PORTSTAT(x)       {info("WR:portstatus[%d] %#8x", wIndex-1, (x));writel((x), &gohci.regs->roothub.portstatus[wIndex-1]);}
 977 #else
 978 #define WR_RH_STAT(x)           writel((x), &gohci.regs->roothub.status)
 979 #define WR_RH_PORTSTAT(x)       writel((x), &gohci.regs->roothub.portstatus[wIndex-1])
 980 #endif
 981 #define RD_RH_STAT              roothub_status(&gohci)
 982 #define RD_RH_PORTSTAT          roothub_portstatus(&gohci,wIndex-1)
 983
 984 /* request to virtual root hub */
 985
 986 int rh_check_port_status(ohci_t *controller)
 987 {
 988         __u32 temp, ndp, i;
 989         int res;
 990
 991         res = -1;
 992         temp = roothub_a (controller);
 993         ndp = (temp & RH_A_NDP);
 994         for (i = 0; i < ndp; i++) {
 995                 temp = roothub_portstatus (controller, i);
 996                 /* check for a device disconnect */
 997                 if (((temp & (RH_PS_PESC | RH_PS_CSC)) ==
 998                         (RH_PS_PESC | RH_PS_CSC)) &&
 999                         ((temp & RH_PS_CCS) == 0)) {
1000                         res = i;
1001                         break;
1002                 }
1003         }
1004         return res;
1005 }
1006
1007 static int ohci_submit_rh_msg(struct usb_device *dev, unsigned long pipe,
1008                 void *buffer, int transfer_len, struct devrequest *cmd)
1009 {
1010         void * data = buffer;
1011         int leni = transfer_len;
1012         int len = 0;
1013         int stat = 0;
1014         __u32 datab[4];
1015         __u8 *data_buf = (__u8 *)datab;
1016         __u16 bmRType_bReq;
1017         __u16 wValue;
1018         __u16 wIndex;
1019         __u16 wLength;
1020
1021 #ifdef DEBUG
1022 urb_priv.actual_length = 0;
1023 pkt_print(dev, pipe, buffer, transfer_len, cmd, "SUB(rh)", usb_pipein(pipe));
1024 #endif
1025         if (usb_pipeint(pipe)) {
1026                 info("Root-Hub submit IRQ: NOT implemented");
1027                 return 0;
1028         }
1029
1030         bmRType_bReq  = cmd->requesttype | (cmd->request << 8);
1031         wValue        = m16_swap (cmd->value);
1032         wIndex        = m16_swap (cmd->index);
1033         wLength       = m16_swap (cmd->length);
1034
1035         info("Root-Hub: adr: %2x cmd(%1x): %08x %04x %04x %04x",
1036                 dev->devnum, 8, bmRType_bReq, wValue, wIndex, wLength);
1037
1038         switch (bmRType_bReq) {
1039         /* Request Destination:
1040            without flags: Device,
1041            RH_INTERFACE: interface,
1042            RH_ENDPOINT: endpoint,
1043            RH_CLASS means HUB here,
1044            RH_OTHER | RH_CLASS  almost ever means HUB_PORT here
1045         */
1046
1047         case RH_GET_STATUS:
1048                         *(__u16 *) data_buf = m16_swap (1); OK (2);
1049         case RH_GET_STATUS | RH_INTERFACE:
1050                         *(__u16 *) data_buf = m16_swap (0); OK (2);
1051         case RH_GET_STATUS | RH_ENDPOINT:
1052                         *(__u16 *) data_buf = m16_swap (0); OK (2);
1053         case RH_GET_STATUS | RH_CLASS:
1054                         *(__u32 *) data_buf = m32_swap (
1055                                 RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE));
1056                         OK (4);
1057         case RH_GET_STATUS | RH_OTHER | RH_CLASS:
1058                         *(__u32 *) data_buf = m32_swap (RD_RH_PORTSTAT); OK (4);
1059
1060         case RH_CLEAR_FEATURE | RH_ENDPOINT:
1061                 switch (wValue) {
1062                         case (RH_ENDPOINT_STALL): OK (0);
1063                 }
1064                 break;
1065
1066         case RH_CLEAR_FEATURE | RH_CLASS:
1067                 switch (wValue) {
1068                         case RH_C_HUB_LOCAL_POWER:
1069                                 OK(0);
1070                         case (RH_C_HUB_OVER_CURRENT):
1071                                         WR_RH_STAT(RH_HS_OCIC); OK (0);
1072                 }
1073                 break;
1074
1075         case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
1076                 switch (wValue) {
1077                         case (RH_PORT_ENABLE):
1078                                         WR_RH_PORTSTAT (RH_PS_CCS ); OK (0);
1079                         case (RH_PORT_SUSPEND):
1080                                         WR_RH_PORTSTAT (RH_PS_POCI); OK (0);
1081                         case (RH_PORT_POWER):
1082                                         WR_RH_PORTSTAT (RH_PS_LSDA); OK (0);
1083                         case (RH_C_PORT_CONNECTION):
1084                                         WR_RH_PORTSTAT (RH_PS_CSC ); OK (0);
1085                         case (RH_C_PORT_ENABLE):
1086                                         WR_RH_PORTSTAT (RH_PS_PESC); OK (0);
1087                         case (RH_C_PORT_SUSPEND):
1088                                         WR_RH_PORTSTAT (RH_PS_PSSC); OK (0);
1089                         case (RH_C_PORT_OVER_CURRENT):
1090                                         WR_RH_PORTSTAT (RH_PS_OCIC); OK (0);
1091                         case (RH_C_PORT_RESET):
1092                                         WR_RH_PORTSTAT (RH_PS_PRSC); OK (0);
1093                 }
1094                 break;
1095
1096         case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
1097                 switch (wValue) {
1098                         case (RH_PORT_SUSPEND):
1099                                         WR_RH_PORTSTAT (RH_PS_PSS ); OK (0);
1100                         case (RH_PORT_RESET): /* BUG IN HUP CODE *********/
1101                                         if (RD_RH_PORTSTAT & RH_PS_CCS)
1102                                             WR_RH_PORTSTAT (RH_PS_PRS);
1103                                         OK (0);
1104                         case (RH_PORT_POWER):
1105                                         WR_RH_PORTSTAT (RH_PS_PPS ); OK (0);
1106                         case (RH_PORT_ENABLE): /* BUG IN HUP CODE *********/
1107                                         if (RD_RH_PORTSTAT & RH_PS_CCS)
1108                                             WR_RH_PORTSTAT (RH_PS_PES );
1109                                         OK (0);
1110                 }
1111                 break;
1112
1113         case RH_SET_ADDRESS: gohci.rh.devnum = wValue; OK(0);
1114
1115         case RH_GET_DESCRIPTOR:
1116                 switch ((wValue & 0xff00) >> 8) {
1117                         case (0x01): /* device descriptor */
1118                                 len = min_t(unsigned int,
1119                                           leni,
1120                                           min_t(unsigned int,
1121                                               sizeof (root_hub_dev_des),
1122                                               wLength));
1123                                 data_buf = root_hub_dev_des; OK(len);
1124                         case (0x02): /* configuration descriptor */
1125                                 len = min_t(unsigned int,
1126                                           leni,
1127                                           min_t(unsigned int,
1128                                               sizeof (root_hub_config_des),
1129                                               wLength));
1130                                 data_buf = root_hub_config_des; OK(len);
1131                         case (0x03): /* string descriptors */
1132                                 if(wValue==0x0300) {
1133                                         len = min_t(unsigned int,
1134                                                   leni,
1135                                                   min_t(unsigned int,
1136                                                       sizeof (root_hub_str_index0),
1137                                                       wLength));
1138                                         data_buf = root_hub_str_index0;
1139                                         OK(len);
1140                                 }
1141                                 if(wValue==0x0301) {
1142                                         len = min_t(unsigned int,
1143                                                   leni,
1144                                                   min_t(unsigned int,
1145                                                       sizeof (root_hub_str_index1),
1146                                                       wLength));
1147                                         data_buf = root_hub_str_index1;
1148                                         OK(len);
1149                         }
1150                         default:
1151                                 stat = USB_ST_STALLED;
1152                 }
1153                 break;
1154
1155         case RH_GET_DESCRIPTOR | RH_CLASS:
1156             {
1157                     __u32 temp = roothub_a (&gohci);
1158
1159                     data_buf [0] = 9;           /* min length; */
1160                     data_buf [1] = 0x29;
1161                     data_buf [2] = temp & RH_A_NDP;
1162                     data_buf [3] = 0;
1163                     if (temp & RH_A_PSM)        /* per-port power switching? */
1164                         data_buf [3] |= 0x1;
1165                     if (temp & RH_A_NOCP)       /* no overcurrent reporting? */
1166                         data_buf [3] |= 0x10;
1167                     else if (temp & RH_A_OCPM)  /* per-port overcurrent reporting? */
1168                         data_buf [3] |= 0x8;
1169
1170                     /* corresponds to data_buf[4-7] */
1171                     datab [1] = 0;
1172                     data_buf [5] = (temp & RH_A_POTPGT) >> 24;
1173                     temp = roothub_b (&gohci);
1174                     data_buf [7] = temp & RH_B_DR;
1175                     if (data_buf [2] < 7) {
1176                         data_buf [8] = 0xff;
1177                     } else {
1178                         data_buf [0] += 2;
1179                         data_buf [8] = (temp & RH_B_DR) >> 8;
1180                         data_buf [10] = data_buf [9] = 0xff;
1181                     }
1182
1183                     len = min_t(unsigned int, leni,
1184                               min_t(unsigned int, data_buf [0], wLength));
1185                     OK (len);
1186                 }
1187
1188         case RH_GET_CONFIGURATION:      *(__u8 *) data_buf = 0x01; OK (1);
1189
1190         case RH_SET_CONFIGURATION:      WR_RH_STAT (0x10000); OK (0);
1191
1192         default:
1193                 dbg ("unsupported root hub command");
1194                 stat = USB_ST_STALLED;
1195         }
1196
1197 #ifdef  DEBUG
1198         ohci_dump_roothub (&gohci, 1);
1199 #endif
1200
1201         len = min_t(int, len, leni);
1202         if (data != data_buf)
1203             memcpy (data, data_buf, len);
1204         dev->act_len = len;
1205         dev->status = stat;
1206
1207 #ifdef DEBUG
1208         if (transfer_len)
1209                 urb_priv.actual_length = transfer_len;
1210         pkt_print(dev, pipe, buffer, transfer_len, cmd, "RET(rh)", 0/*usb_pipein(pipe)*/);
1211 #endif
1212
1213         return stat;
1214 }
1215
1216 /*-------------------------------------------------------------------------*/
1217
1218 /* common code for handling submit messages - used for all but root hub */
1219 /* accesses. */
1220 int submit_common_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1221                 int transfer_len, struct devrequest *setup, int interval)
1222 {
1223         int stat = 0;
1224         int maxsize = usb_maxpacket(dev, pipe);
1225         int timeout;
1226
1227         /* device pulled? Shortcut the action. */
1228         if (devgone == dev) {
1229                 dev->status = USB_ST_CRC_ERR;
1230                 return 0;
1231         }
1232
1233 #ifdef DEBUG
1234         urb_priv.actual_length = 0;
1235         pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB", usb_pipein(pipe));
1236 #endif
1237         if (!maxsize) {
1238                 err("submit_common_message: pipesize for pipe %lx is zero",
1239                         pipe);
1240                 return -1;
1241         }
1242
1243         if (sohci_submit_job(dev, pipe, buffer, transfer_len, setup, interval) < 0) {
1244                 err("sohci_submit_job failed");
1245                 return -1;
1246         }
1247
1248         /* allow more time for a BULK device to react - some are slow */
1249 #define BULK_TO  5000   /* timeout in milliseconds */
1250         if (usb_pipebulk(pipe))
1251                 timeout = BULK_TO;
1252         else
1253                 timeout = 100;
1254
1255         /* wait for it to complete */
1256         for (;;) {
1257                 /* check whether the controller is done */
1258                 stat = hc_interrupt();
1259                 if (stat < 0) {
1260                         stat = USB_ST_CRC_ERR;
1261                         break;
1262                 }
1263
1264                 /* NOTE: since we are not interrupt driven in U-Boot and always
1265                  * handle only one URB at a time, we cannot assume the
1266                  * transaction finished on the first successful return from
1267                  * hc_interrupt().. unless the flag for current URB is set,
1268                  * meaning that all TD's to/from device got actually
1269                  * transferred and processed. If the current URB is not
1270                  * finished we need to re-iterate this loop so as
1271                  * hc_interrupt() gets called again as there needs to be some
1272                  * more TD's to process still */
1273                 if ((stat >= 0) && (stat != 0xff) && (urb_finished)) {
1274                         /* 0xff is returned for an SF-interrupt */
1275                         break;
1276                 }
1277
1278                 if (--timeout) {
1279                         wait_ms(1);
1280                         if (!urb_finished)
1281                                 dbg("\%");
1282
1283                 } else {
1284                         err("CTL:TIMEOUT ");
1285                         dbg("submit_common_msg: TO status %x\n", stat);
1286                         stat = USB_ST_CRC_ERR;
1287                         urb_finished = 1;
1288                         break;
1289                 }
1290         }
1291 #if 0
1292         /* we got an Root Hub Status Change interrupt */
1293         if (got_rhsc) {
1294 #ifdef DEBUG
1295                 ohci_dump_roothub (&gohci, 1);
1296 #endif
1297                 got_rhsc = 0;
1298                 /* abuse timeout */
1299                 timeout = rh_check_port_status(&gohci);
1300                 if (timeout >= 0) {
1301 #if 0 /* this does nothing useful, but leave it here in case that changes */
1302                         /* the called routine adds 1 to the passed value */
1303                         usb_hub_port_connect_change(gohci.rh.dev, timeout - 1);
1304 #endif
1305                         /*
1306                          * XXX
1307                          * This is potentially dangerous because it assumes
1308                          * that only one device is ever plugged in!
1309                          */
1310                         devgone = dev;
1311                 }
1312         }
1313 #endif
1314
1315         dev->status = stat;
1316         dev->act_len = transfer_len;
1317
1318 #ifdef DEBUG
1319         pkt_print(dev, pipe, buffer, transfer_len, setup, "RET(ctlr)", usb_pipein(pipe));
1320 #endif
1321
1322         /* free TDs in urb_priv */
1323         urb_free_priv (&urb_priv);
1324         return 0;
1325 }
1326
1327 /* submit routines called from usb.c */
1328 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1329                 int transfer_len)
1330 {
1331         info("submit_bulk_msg");
1332         return submit_common_msg(dev, pipe, buffer, transfer_len, NULL, 0);
1333 }
1334
1335 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1336                 int transfer_len, struct devrequest *setup)
1337 {
1338         int maxsize = usb_maxpacket(dev, pipe);
1339
1340         info("submit_control_msg");
1341 #ifdef DEBUG
1342         urb_priv.actual_length = 0;
1343         pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB", usb_pipein(pipe));
1344 #endif
1345         if (!maxsize) {
1346                 err("submit_control_message: pipesize for pipe %lx is zero",
1347                         pipe);
1348                 return -1;
1349         }
1350         if (((pipe >> 8) & 0x7f) == gohci.rh.devnum) {
1351                 gohci.rh.dev = dev;
1352                 /* root hub - redirect */
1353                 return ohci_submit_rh_msg(dev, pipe, buffer, transfer_len,
1354                         setup);
1355         }
1356
1357         return submit_common_msg(dev, pipe, buffer, transfer_len, setup, 0);
1358 }
1359
1360 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1361                 int transfer_len, int interval)
1362 {
1363         info("submit_int_msg");
1364         return -1;
1365 }
1366
1367 /*-------------------------------------------------------------------------*
1368  * HC functions
1369  *-------------------------------------------------------------------------*/
1370
1371 /* reset the HC and BUS */
1372
1373 static int hc_reset (ohci_t *ohci)
1374 {
1375         int timeout = 30;
1376         int smm_timeout = 50; /* 0,5 sec */
1377
1378         if (readl (&ohci->regs->control) & OHCI_CTRL_IR) { /* SMM owns the HC */
1379                 writel (OHCI_OCR, &ohci->regs->cmdstatus); /* request ownership */
1380                 info("USB HC TakeOver from SMM");
1381                 while (readl (&ohci->regs->control) & OHCI_CTRL_IR) {
1382                         wait_ms (10);
1383                         if (--smm_timeout == 0) {
1384                                 err("USB HC TakeOver failed!");
1385                                 return -1;
1386                         }
1387                 }
1388         }
1389
1390         /* Disable HC interrupts */
1391         writel (OHCI_INTR_MIE, &ohci->regs->intrdisable);
1392
1393         dbg("USB HC reset_hc usb-%s: ctrl = 0x%X ;",
1394                 ohci->slot_name,
1395                 readl (&ohci->regs->control));
1396
1397         /* Reset USB (needed by some controllers) */
1398         ohci->hc_control = 0;
1399         writel (ohci->hc_control, &ohci->regs->control);
1400
1401         /* HC Reset requires max 10 us delay */
1402         writel (OHCI_HCR,  &ohci->regs->cmdstatus);
1403         while ((readl (&ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
1404                 if (--timeout == 0) {
1405                         err("USB HC reset timed out!");
1406                         return -1;
1407                 }
1408                 udelay (1);
1409         }
1410         return 0;
1411 }
1412
1413 /*-------------------------------------------------------------------------*/
1414
1415 /* Start an OHCI controller, set the BUS operational
1416  * enable interrupts
1417  * connect the virtual root hub */
1418
1419 static int hc_start (ohci_t * ohci)
1420 {
1421         __u32 mask;
1422         unsigned int fminterval;
1423
1424         ohci->disabled = 1;
1425
1426         /* Tell the controller where the control and bulk lists are
1427          * The lists are empty now. */
1428
1429         writel (0, &ohci->regs->ed_controlhead);
1430         writel (0, &ohci->regs->ed_bulkhead);
1431
1432         writel ((__u32)ohci->hcca, &ohci->regs->hcca); /* a reset clears this */
1433
1434         fminterval = 0x2edf;
1435         writel ((fminterval * 9) / 10, &ohci->regs->periodicstart);
1436         fminterval |= ((((fminterval - 210) * 6) / 7) << 16);
1437         writel (fminterval, &ohci->regs->fminterval);
1438         writel (0x628, &ohci->regs->lsthresh);
1439
1440         /* start controller operations */
1441         ohci->hc_control = OHCI_CONTROL_INIT | OHCI_USB_OPER;
1442         ohci->disabled = 0;
1443         writel (ohci->hc_control, &ohci->regs->control);
1444
1445         /* disable all interrupts */
1446         mask = (OHCI_INTR_SO | OHCI_INTR_WDH | OHCI_INTR_SF | OHCI_INTR_RD |
1447                         OHCI_INTR_UE | OHCI_INTR_FNO | OHCI_INTR_RHSC |
1448                         OHCI_INTR_OC | OHCI_INTR_MIE);
1449         writel (mask, &ohci->regs->intrdisable);
1450         /* clear all interrupts */
1451         mask &= ~OHCI_INTR_MIE;
1452         writel (mask, &ohci->regs->intrstatus);
1453         /* Choose the interrupts we care about now  - but w/o MIE */
1454         mask = OHCI_INTR_RHSC | OHCI_INTR_UE | OHCI_INTR_WDH | OHCI_INTR_SO;
1455         writel (mask, &ohci->regs->intrenable);
1456
1457 #ifdef  OHCI_USE_NPS
1458         /* required for AMD-756 and some Mac platforms */
1459         writel ((roothub_a (ohci) | RH_A_NPS) & ~RH_A_PSM,
1460                 &ohci->regs->roothub.a);
1461         writel (RH_HS_LPSC, &ohci->regs->roothub.status);
1462 #endif  /* OHCI_USE_NPS */
1463
1464         /* POTPGT delay is bits 24-31, in 2 ms units. */
1465         mdelay ((roothub_a (ohci) >> 23) & 0x1fe);
1466
1467         /* connect the virtual root hub */
1468         ohci->rh.devnum = 0;
1469
1470         return 0;
1471 }
1472
1473 /*-------------------------------------------------------------------------*/
1474
1475 /* an interrupt happens */
1476
1477 static int
1478 hc_interrupt (void)
1479 {
1480         ohci_t *ohci = &gohci;
1481         struct ohci_regs *regs = ohci->regs;
1482         int ints;
1483         int stat = -1;
1484
1485         if ((ohci->hcca->done_head != 0) &&
1486              !(ohci_cpu_to_le32(ohci->hcca->done_head) & 0x01)) {
1487
1488                 ints =  OHCI_INTR_WDH;
1489
1490         } else if ((ints = readl (&regs->intrstatus)) == ~(u32)0) {
1491                 ohci->disabled++;
1492                 err ("%s device removed!", ohci->slot_name);
1493                 return -1;
1494
1495         } else if ((ints &= readl (&regs->intrenable)) == 0) {
1496                 dbg("hc_interrupt: returning..\n");
1497                 return 0xff;
1498         }
1499
1500         /* dbg("Interrupt: %x frame: %x", ints, le16_to_cpu (ohci->hcca->frame_no)); */
1501
1502         if (ints & OHCI_INTR_RHSC) {
1503                 got_rhsc = 1;
1504                 stat = 0xff;
1505         }
1506
1507         if (ints & OHCI_INTR_UE) {
1508                 ohci->disabled++;
1509                 err ("OHCI Unrecoverable Error, controller usb-%s disabled",
1510                         ohci->slot_name);
1511                 /* e.g. due to PCI Master/Target Abort */
1512
1513 #ifdef  DEBUG
1514                 ohci_dump (ohci, 1);
1515 #endif
1516                 /* FIXME: be optimistic, hope that bug won't repeat often. */
1517                 /* Make some non-interrupt context restart the controller. */
1518                 /* Count and limit the retries though; either hardware or */
1519                 /* software errors can go forever... */
1520                 hc_reset (ohci);
1521                 return -1;
1522         }
1523
1524         if (ints & OHCI_INTR_WDH) {
1525                 writel (OHCI_INTR_WDH, &regs->intrdisable);
1526                 stat = dl_done_list (&gohci, dl_reverse_done_list (&gohci));
1527                 writel (OHCI_INTR_WDH, &regs->intrenable);
1528         }
1529
1530         if (ints & OHCI_INTR_SO) {
1531                 dbg("USB Schedule overrun\n");
1532                 writel (OHCI_INTR_SO, &regs->intrenable);
1533                 stat = -1;
1534         }
1535
1536         /* FIXME:  this assumes SOF (1/ms) interrupts don't get lost... */
1537         if (ints & OHCI_INTR_SF) {
1538                 unsigned int frame = ohci_cpu_to_le16 (ohci->hcca->frame_no) & 1;
1539                 wait_ms(1);
1540                 writel (OHCI_INTR_SF, &regs->intrdisable);
1541                 if (ohci->ed_rm_list[frame] != NULL)
1542                         writel (OHCI_INTR_SF, &regs->intrenable);
1543                 stat = 0xff;
1544         }
1545
1546         writel (ints, &regs->intrstatus);
1547         return stat;
1548 }
1549
1550 /*-------------------------------------------------------------------------*/
1551
1552 /*-------------------------------------------------------------------------*/
1553
1554 /* De-allocate all resources.. */
1555
1556 static void hc_release_ohci (ohci_t *ohci)
1557 {
1558         dbg ("USB HC release ohci usb-%s", ohci->slot_name);
1559
1560         if (!ohci->disabled)
1561                 hc_reset (ohci);
1562 }
1563
1564 /*-------------------------------------------------------------------------*/
1565
1566 /*
1567  * low level initalisation routine, called from usb.c
1568  */
1569 static char ohci_inited = 0;
1570
1571 int usb_lowlevel_init(void)
1572 {
1573         memset (&gohci, 0, sizeof (ohci_t));
1574         memset (&urb_priv, 0, sizeof (urb_priv_t));
1575
1576         /* align the storage */
1577         if ((__u32)&ghcca[0] & 0xff) {
1578                 err("HCCA not aligned!!");
1579                 return -1;
1580         }
1581         phcca = &ghcca[0];
1582         info("aligned ghcca %p", phcca);
1583         memset(&ohci_dev, 0, sizeof(struct ohci_device));
1584         if ((__u32)&ohci_dev.ed[0] & 0x7) {
1585                 err("EDs not aligned!!");
1586                 return -1;
1587         }
1588         memset(gtd, 0, sizeof(td_t) * (NUM_TD + 1));
1589         if ((__u32)gtd & 0x7) {
1590                 err("TDs not aligned!!");
1591                 return -1;
1592         }
1593         ptd = gtd;
1594         gohci.hcca = phcca;
1595         memset (phcca, 0, sizeof (struct ohci_hcca));
1596
1597         gohci.disabled = 1;
1598         gohci.sleeping = 0;
1599         gohci.irq = -1;
1600 #if defined(CONFIG_440EP)
1601         gohci.regs = (struct ohci_regs *)(CONFIG_SYS_PERIPHERAL_BASE | 0x1000);
1602 #elif defined(CONFIG_440EPX) || defined(CONFIG_SYS_USB_HOST)
1603         gohci.regs = (struct ohci_regs *)(CONFIG_SYS_USB_HOST);
1604 #endif
1605
1606         gohci.flags = 0;
1607         gohci.slot_name = "ppc440";
1608
1609         if (hc_reset (&gohci) < 0) {
1610                 hc_release_ohci (&gohci);
1611                 return -1;
1612         }
1613
1614         if (hc_start (&gohci) < 0) {
1615                 err ("can't start usb-%s", gohci.slot_name);
1616                 hc_release_ohci (&gohci);
1617                 return -1;
1618         }
1619
1620 #ifdef  DEBUG
1621         ohci_dump (&gohci, 1);
1622 #endif
1623         ohci_inited = 1;
1624         urb_finished = 1;
1625
1626 #if defined(CONFIG_440EP) || defined(CONFIG_440EPX)
1627         /* init the device driver */
1628         usb_dev_init();
1629 #endif
1630
1631         return 0;
1632 }
1633
1634 int usb_lowlevel_stop(void)
1635 {
1636         /* this gets called really early - before the controller has */
1637         /* even been initialized! */
1638         if (!ohci_inited)
1639                 return 0;
1640         /* TODO release any interrupts, etc. */
1641         /* call hc_release_ohci() here ? */
1642         hc_reset (&gohci);
1643         return 0;
1644 }
1645
1646 #endif /* CONFIG_USB_OHCI */