git.sur5r.net Git - u-boot/blob - cpu/mpc5xxx/usb_ohci.c

   1 /*
   2  * URB OHCI HCD (Host Controller Driver) for USB on the MPC5200.
   3  *
   4  * (C) Copyright 2003-2004
   5  * Gary Jennejohn, DENX Software Engineering <gj@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 <mpc5xxx.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) (*((vu_long *)(a)))
  60 #define writel(a, b) (*((vu_long *)(b)) = ((vu_long)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 #ifdef CONFIG_MPC5200
  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
 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         /* every endpoint has a ed, locate and fill it */
 406         if (!(ed = ep_add_ed (dev, pipe))) {
 407                 err("sohci_submit_job: ENOMEM");
 408                 return -1;
 409         }
 410
 411         /* for the private part of the URB we need the number of TDs (size) */
 412         switch (usb_pipetype (pipe)) {
 413                 case PIPE_BULK: /* one TD for every 4096 Byte */
 414                         size = (transfer_len - 1) / 4096 + 1;
 415                         break;
 416                 case PIPE_CONTROL: /* 1 TD for setup, 1 for ACK and 1 for every 4096 B */
 417                         size = (transfer_len == 0)? 2:
 418                                                 (transfer_len - 1) / 4096 + 3;
 419                         break;
 420         }
 421
 422         if (size >= (N_URB_TD - 1)) {
 423                 err("need %d TDs, only have %d", size, N_URB_TD);
 424                 return -1;
 425         }
 426         purb_priv = &urb_priv;
 427         purb_priv->pipe = pipe;
 428
 429         /* fill the private part of the URB */
 430         purb_priv->length = size;
 431         purb_priv->ed = ed;
 432         purb_priv->actual_length = 0;
 433
 434         /* allocate the TDs */
 435         /* note that td[0] was allocated in ep_add_ed */
 436         for (i = 0; i < size; i++) {
 437                 purb_priv->td[i] = td_alloc (dev);
 438                 if (!purb_priv->td[i]) {
 439                         purb_priv->length = i;
 440                         urb_free_priv (purb_priv);
 441                         err("sohci_submit_job: ENOMEM");
 442                         return -1;
 443                 }
 444         }
 445
 446         if (ed->state == ED_NEW || (ed->state & ED_DEL)) {
 447                 urb_free_priv (purb_priv);
 448                 err("sohci_submit_job: EINVAL");
 449                 return -1;
 450         }
 451
 452         /* link the ed into a chain if is not already */
 453         if (ed->state != ED_OPER)
 454                 ep_link (ohci, ed);
 455
 456         /* fill the TDs and link it to the ed */
 457         td_submit_job(dev, pipe, buffer, transfer_len, setup, purb_priv, interval);
 458
 459         return 0;
 460 }
 461
 462 /*-------------------------------------------------------------------------*/
 463
 464 #ifdef DEBUG
 465 /* tell us the current USB frame number */
 466
 467 static int sohci_get_current_frame_number (struct usb_device *usb_dev)
 468 {
 469         ohci_t *ohci = &gohci;
 470
 471         return ohci_cpu_to_le16 (ohci->hcca->frame_no);
 472 }
 473 #endif
 474
 475 /*-------------------------------------------------------------------------*
 476  * ED handling functions
 477  *-------------------------------------------------------------------------*/
 478
 479 /* link an ed into one of the HC chains */
 480
 481 static int ep_link (ohci_t *ohci, ed_t *edi)
 482 {
 483         volatile ed_t *ed = edi;
 484
 485         ed->state = ED_OPER;
 486
 487         switch (ed->type) {
 488         case PIPE_CONTROL:
 489                 ed->hwNextED = 0;
 490                 if (ohci->ed_controltail == NULL) {
 491                         writel (ed, &ohci->regs->ed_controlhead);
 492                 } else {
 493                         ohci->ed_controltail->hwNextED = ohci_cpu_to_le32 ((unsigned long)ed);
 494                 }
 495                 ed->ed_prev = ohci->ed_controltail;
 496                 if (!ohci->ed_controltail && !ohci->ed_rm_list[0] &&
 497                         !ohci->ed_rm_list[1] && !ohci->sleeping) {
 498                         ohci->hc_control |= OHCI_CTRL_CLE;
 499                         writel (ohci->hc_control, &ohci->regs->control);
 500                 }
 501                 ohci->ed_controltail = edi;
 502                 break;
 503
 504         case PIPE_BULK:
 505                 ed->hwNextED = 0;
 506                 if (ohci->ed_bulktail == NULL) {
 507                         writel (ed, &ohci->regs->ed_bulkhead);
 508                 } else {
 509                         ohci->ed_bulktail->hwNextED = ohci_cpu_to_le32 ((unsigned long)ed);
 510                 }
 511                 ed->ed_prev = ohci->ed_bulktail;
 512                 if (!ohci->ed_bulktail && !ohci->ed_rm_list[0] &&
 513                         !ohci->ed_rm_list[1] && !ohci->sleeping) {
 514                         ohci->hc_control |= OHCI_CTRL_BLE;
 515                         writel (ohci->hc_control, &ohci->regs->control);
 516                 }
 517                 ohci->ed_bulktail = edi;
 518                 break;
 519         }
 520         return 0;
 521 }
 522
 523 /*-------------------------------------------------------------------------*/
 524
 525 /* unlink an ed from one of the HC chains.
 526  * just the link to the ed is unlinked.
 527  * the link from the ed still points to another operational ed or 0
 528  * so the HC can eventually finish the processing of the unlinked ed */
 529
 530 static int ep_unlink (ohci_t *ohci, ed_t *edi)
 531 {
 532         volatile ed_t *ed = edi;
 533
 534         ed->hwINFO |= ohci_cpu_to_le32 (OHCI_ED_SKIP);
 535
 536         switch (ed->type) {
 537         case PIPE_CONTROL:
 538                 if (ed->ed_prev == NULL) {
 539                         if (!ed->hwNextED) {
 540                                 ohci->hc_control &= ~OHCI_CTRL_CLE;
 541                                 writel (ohci->hc_control, &ohci->regs->control);
 542                         }
 543                         writel (ohci_cpu_to_le32 (*((__u32 *)&ed->hwNextED)), &ohci->regs->ed_controlhead);
 544                 } else {
 545                         ed->ed_prev->hwNextED = ed->hwNextED;
 546                 }
 547                 if (ohci->ed_controltail == ed) {
 548                         ohci->ed_controltail = ed->ed_prev;
 549                 } else {
 550                         ((ed_t *)ohci_cpu_to_le32 (*((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
 551                 }
 552                 break;
 553
 554         case PIPE_BULK:
 555                 if (ed->ed_prev == NULL) {
 556                         if (!ed->hwNextED) {
 557                                 ohci->hc_control &= ~OHCI_CTRL_BLE;
 558                                 writel (ohci->hc_control, &ohci->regs->control);
 559                         }
 560                         writel (ohci_cpu_to_le32 (*((__u32 *)&ed->hwNextED)), &ohci->regs->ed_bulkhead);
 561                 } else {
 562                         ed->ed_prev->hwNextED = ed->hwNextED;
 563                 }
 564                 if (ohci->ed_bulktail == ed) {
 565                         ohci->ed_bulktail = ed->ed_prev;
 566                 } else {
 567                         ((ed_t *)ohci_cpu_to_le32 (*((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
 568                 }
 569                 break;
 570         }
 571         ed->state = ED_UNLINK;
 572         return 0;
 573 }
 574
 575
 576 /*-------------------------------------------------------------------------*/
 577
 578 /* add/reinit an endpoint; this should be done once at the usb_set_configuration command,
 579  * but the USB stack is a little bit stateless  so we do it at every transaction
 580  * if the state of the ed is ED_NEW then a dummy td is added and the state is changed to ED_UNLINK
 581  * in all other cases the state is left unchanged
 582  * the ed info fields are setted anyway even though most of them should not change */
 583
 584 static ed_t * ep_add_ed (struct usb_device *usb_dev, unsigned long pipe)
 585 {
 586         td_t *td;
 587         ed_t *ed_ret;
 588         volatile ed_t *ed;
 589
 590         ed = ed_ret = &ohci_dev.ed[(usb_pipeendpoint (pipe) << 1) |
 591                         (usb_pipecontrol (pipe)? 0: usb_pipeout (pipe))];
 592
 593         if ((ed->state & ED_DEL) || (ed->state & ED_URB_DEL)) {
 594                 err("ep_add_ed: pending delete");
 595                 /* pending delete request */
 596                 return NULL;
 597         }
 598
 599         if (ed->state == ED_NEW) {
 600                 ed->hwINFO = ohci_cpu_to_le32 (OHCI_ED_SKIP); /* skip ed */
 601                 /* dummy td; end of td list for ed */
 602                 td = td_alloc (usb_dev);
 603                 ed->hwTailP = ohci_cpu_to_le32 ((unsigned long)td);
 604                 ed->hwHeadP = ed->hwTailP;
 605                 ed->state = ED_UNLINK;
 606                 ed->type = usb_pipetype (pipe);
 607                 ohci_dev.ed_cnt++;
 608         }
 609
 610         ed->hwINFO = ohci_cpu_to_le32 (usb_pipedevice (pipe)
 611                         | usb_pipeendpoint (pipe) << 7
 612                         | (usb_pipeisoc (pipe)? 0x8000: 0)
 613                         | (usb_pipecontrol (pipe)? 0: (usb_pipeout (pipe)? 0x800: 0x1000))
 614                         | usb_pipeslow (pipe) << 13
 615                         | usb_maxpacket (usb_dev, pipe) << 16);
 616
 617         return ed_ret;
 618 }
 619
 620 /*-------------------------------------------------------------------------*
 621  * TD handling functions
 622  *-------------------------------------------------------------------------*/
 623
 624 /* enqueue next TD for this URB (OHCI spec 5.2.8.2) */
 625
 626 static void td_fill (ohci_t *ohci, unsigned int info,
 627         void *data, int len,
 628         struct usb_device *dev, int index, urb_priv_t *urb_priv)
 629 {
 630         volatile td_t  *td, *td_pt;
 631 #ifdef OHCI_FILL_TRACE
 632         int i;
 633 #endif
 634
 635         if (index > urb_priv->length) {
 636                 err("index > length");
 637                 return;
 638         }
 639         /* use this td as the next dummy */
 640         td_pt = urb_priv->td [index];
 641         td_pt->hwNextTD = 0;
 642
 643         /* fill the old dummy TD */
 644         td = urb_priv->td [index] = (td_t *)(ohci_cpu_to_le32 (urb_priv->ed->hwTailP) & ~0xf);
 645
 646         td->ed = urb_priv->ed;
 647         td->next_dl_td = NULL;
 648         td->index = index;
 649         td->data = (__u32)data;
 650 #ifdef OHCI_FILL_TRACE
 651         if ((usb_pipetype(urb_priv->pipe) == PIPE_BULK) && usb_pipeout(urb_priv->pipe)) {
 652                 for (i = 0; i < len; i++)
 653                 printf("td->data[%d] %#2x ",i, ((unsigned char *)td->data)[i]);
 654                 printf("\n");
 655         }
 656 #endif
 657         if (!len)
 658                 data = 0;
 659
 660         td->hwINFO = ohci_cpu_to_le32 (info);
 661         td->hwCBP = ohci_cpu_to_le32 ((unsigned long)data);
 662         if (data)
 663                 td->hwBE = ohci_cpu_to_le32 ((unsigned long)(data + len - 1));
 664         else
 665                 td->hwBE = 0;
 666         td->hwNextTD = ohci_cpu_to_le32 ((unsigned long)td_pt);
 667         td->hwPSW [0] = ohci_cpu_to_le16 (((__u32)data & 0x0FFF) | 0xE000);
 668
 669         /* append to queue */
 670         td->ed->hwTailP = td->hwNextTD;
 671 }
 672
 673 /*-------------------------------------------------------------------------*/
 674
 675 /* prepare all TDs of a transfer */
 676
 677 static void td_submit_job (struct usb_device *dev, unsigned long pipe, void *buffer,
 678         int transfer_len, struct devrequest *setup, urb_priv_t *urb, int interval)
 679 {
 680         ohci_t *ohci = &gohci;
 681         int data_len = transfer_len;
 682         void *data;
 683         int cnt = 0;
 684         __u32 info = 0;
 685         unsigned int toggle = 0;
 686
 687         /* OHCI handles the DATA-toggles itself, we just use the USB-toggle bits for reseting */
 688         if(usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe))) {
 689                 toggle = TD_T_TOGGLE;
 690         } else {
 691                 toggle = TD_T_DATA0;
 692                 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 1);
 693         }
 694         urb->td_cnt = 0;
 695         if (data_len)
 696                 data = buffer;
 697         else
 698                 data = 0;
 699
 700         switch (usb_pipetype (pipe)) {
 701         case PIPE_BULK:
 702                 info = usb_pipeout (pipe)?
 703                         TD_CC | TD_DP_OUT : TD_CC | TD_DP_IN ;
 704                 while(data_len > 4096) {
 705                         td_fill (ohci, info | (cnt? TD_T_TOGGLE:toggle), data, 4096, dev, cnt, urb);
 706                         data += 4096; data_len -= 4096; cnt++;
 707                 }
 708                 info = usb_pipeout (pipe)?
 709                         TD_CC | TD_DP_OUT : TD_CC | TD_R | TD_DP_IN ;
 710                 td_fill (ohci, info | (cnt? TD_T_TOGGLE:toggle), data, data_len, dev, cnt, urb);
 711                 cnt++;
 712
 713                 if (!ohci->sleeping)
 714                         writel (OHCI_BLF, &ohci->regs->cmdstatus); /* start bulk list */
 715                 break;
 716
 717         case PIPE_CONTROL:
 718                 info = TD_CC | TD_DP_SETUP | TD_T_DATA0;
 719                 td_fill (ohci, info, setup, 8, dev, cnt++, urb);
 720                 if (data_len > 0) {
 721                         info = usb_pipeout (pipe)?
 722                                 TD_CC | TD_R | TD_DP_OUT | TD_T_DATA1 : TD_CC | TD_R | TD_DP_IN | TD_T_DATA1;
 723                         /* NOTE:  mishandles transfers >8K, some >4K */
 724                         td_fill (ohci, info, data, data_len, dev, cnt++, urb);
 725                 }
 726                 info = usb_pipeout (pipe)?
 727                         TD_CC | TD_DP_IN | TD_T_DATA1: TD_CC | TD_DP_OUT | TD_T_DATA1;
 728                 td_fill (ohci, info, data, 0, dev, cnt++, urb);
 729                 if (!ohci->sleeping)
 730                         writel (OHCI_CLF, &ohci->regs->cmdstatus); /* start Control list */
 731                 break;
 732         }
 733         if (urb->length != cnt)
 734                 dbg("TD LENGTH %d != CNT %d", urb->length, cnt);
 735 }
 736
 737 /*-------------------------------------------------------------------------*
 738  * Done List handling functions
 739  *-------------------------------------------------------------------------*/
 740
 741
 742 /* calculate the transfer length and update the urb */
 743
 744 static void dl_transfer_length(td_t * td)
 745 {
 746         __u32 tdINFO, tdBE, tdCBP;
 747         urb_priv_t *lurb_priv = &urb_priv;
 748
 749         tdINFO = ohci_cpu_to_le32 (td->hwINFO);
 750         tdBE   = ohci_cpu_to_le32 (td->hwBE);
 751         tdCBP  = ohci_cpu_to_le32 (td->hwCBP);
 752
 753
 754         if (!(usb_pipetype (lurb_priv->pipe) == PIPE_CONTROL &&
 755             ((td->index == 0) || (td->index == lurb_priv->length - 1)))) {
 756                 if (tdBE != 0) {
 757                         if (td->hwCBP == 0)
 758                                 lurb_priv->actual_length += tdBE - td->data + 1;
 759                         else
 760                                 lurb_priv->actual_length += tdCBP - td->data;
 761                 }
 762         }
 763 }
 764
 765 /*-------------------------------------------------------------------------*/
 766
 767 /* replies to the request have to be on a FIFO basis so
 768  * we reverse the reversed done-list */
 769
 770 static td_t * dl_reverse_done_list (ohci_t *ohci)
 771 {
 772         __u32 td_list_hc;
 773         td_t *td_rev = NULL;
 774         td_t *td_list = NULL;
 775         urb_priv_t *lurb_priv = NULL;
 776
 777         td_list_hc = ohci_cpu_to_le32 (ohci->hcca->done_head) & 0xfffffff0;
 778         ohci->hcca->done_head = 0;
 779
 780         while (td_list_hc) {
 781                 td_list = (td_t *)td_list_hc;
 782
 783                 if (TD_CC_GET (ohci_cpu_to_le32 (td_list->hwINFO))) {
 784                         lurb_priv = &urb_priv;
 785                         dbg(" USB-error/status: %x : %p",
 786                                         TD_CC_GET (ohci_cpu_to_le32 (td_list->hwINFO)), td_list);
 787                         if (td_list->ed->hwHeadP & ohci_cpu_to_le32 (0x1)) {
 788                                 if (lurb_priv && ((td_list->index + 1) < lurb_priv->length)) {
 789                                         td_list->ed->hwHeadP =
 790                                                 (lurb_priv->td[lurb_priv->length - 1]->hwNextTD & ohci_cpu_to_le32 (0xfffffff0)) |
 791                                                                         (td_list->ed->hwHeadP & ohci_cpu_to_le32 (0x2));
 792                                         lurb_priv->td_cnt += lurb_priv->length - td_list->index - 1;
 793                                 } else
 794                                         td_list->ed->hwHeadP &= ohci_cpu_to_le32 (0xfffffff2);
 795                         }
 796 #ifdef CONFIG_MPC5200
 797                         td_list->hwNextTD = 0;
 798 #endif
 799                 }
 800
 801                 td_list->next_dl_td = td_rev;
 802                 td_rev = td_list;
 803                 td_list_hc = ohci_cpu_to_le32 (td_list->hwNextTD) & 0xfffffff0;
 804         }
 805         return td_list;
 806 }
 807
 808 /*-------------------------------------------------------------------------*/
 809
 810 /* td done list */
 811 static int dl_done_list (ohci_t *ohci, td_t *td_list)
 812 {
 813         td_t *td_list_next = NULL;
 814         ed_t *ed;
 815         int cc = 0;
 816         int stat = 0xff;
 817         /* urb_t *urb; */
 818         urb_priv_t *lurb_priv;
 819         __u32 tdINFO, edHeadP, edTailP;
 820
 821         while (td_list) {
 822                 td_list_next = td_list->next_dl_td;
 823
 824                 lurb_priv = &urb_priv;
 825                 tdINFO = ohci_cpu_to_le32 (td_list->hwINFO);
 826
 827                 ed = td_list->ed;
 828
 829                 dl_transfer_length(td_list);
 830
 831                 /* error code of transfer */
 832                 cc = TD_CC_GET (tdINFO);
 833                 if (++(lurb_priv->td_cnt) == lurb_priv->length) {
 834                         if ((ed->state & (ED_OPER | ED_UNLINK))
 835                                         && (lurb_priv->state != URB_DEL)) {
 836                                 dbg("ConditionCode %#x", cc);
 837                                 stat = cc_to_error[cc];
 838                         }
 839                 }
 840
 841                 if (ed->state != ED_NEW) {
 842                         edHeadP = ohci_cpu_to_le32 (ed->hwHeadP) & 0xfffffff0;
 843                         edTailP = ohci_cpu_to_le32 (ed->hwTailP);
 844
 845                         /* unlink eds if they are not busy */
 846                         if ((edHeadP == edTailP) && (ed->state == ED_OPER))
 847                                 ep_unlink (ohci, ed);
 848                 }
 849
 850                 td_list = td_list_next;
 851         }
 852         return stat;
 853 }
 854
 855 /*-------------------------------------------------------------------------*
 856  * Virtual Root Hub
 857  *-------------------------------------------------------------------------*/
 858
 859 /* Device descriptor */
 860 static __u8 root_hub_dev_des[] =
 861 {
 862         0x12,       /*  __u8  bLength; */
 863         0x01,       /*  __u8  bDescriptorType; Device */
 864         0x10,       /*  __u16 bcdUSB; v1.1 */
 865         0x01,
 866         0x09,       /*  __u8  bDeviceClass; HUB_CLASSCODE */
 867         0x00,       /*  __u8  bDeviceSubClass; */
 868         0x00,       /*  __u8  bDeviceProtocol; */
 869         0x08,       /*  __u8  bMaxPacketSize0; 8 Bytes */
 870         0x00,       /*  __u16 idVendor; */
 871         0x00,
 872         0x00,       /*  __u16 idProduct; */
 873         0x00,
 874         0x00,       /*  __u16 bcdDevice; */
 875         0x00,
 876         0x00,       /*  __u8  iManufacturer; */
 877         0x01,       /*  __u8  iProduct; */
 878         0x00,       /*  __u8  iSerialNumber; */
 879         0x01        /*  __u8  bNumConfigurations; */
 880 };
 881
 882
 883 /* Configuration descriptor */
 884 static __u8 root_hub_config_des[] =
 885 {
 886         0x09,       /*  __u8  bLength; */
 887         0x02,       /*  __u8  bDescriptorType; Configuration */
 888         0x19,       /*  __u16 wTotalLength; */
 889         0x00,
 890         0x01,       /*  __u8  bNumInterfaces; */
 891         0x01,       /*  __u8  bConfigurationValue; */
 892         0x00,       /*  __u8  iConfiguration; */
 893         0x40,       /*  __u8  bmAttributes;
 894                  Bit 7: Bus-powered, 6: Self-powered, 5 Remote-wakwup, 4..0: resvd */
 895         0x00,       /*  __u8  MaxPower; */
 896
 897         /* interface */
 898         0x09,       /*  __u8  if_bLength; */
 899         0x04,       /*  __u8  if_bDescriptorType; Interface */
 900         0x00,       /*  __u8  if_bInterfaceNumber; */
 901         0x00,       /*  __u8  if_bAlternateSetting; */
 902         0x01,       /*  __u8  if_bNumEndpoints; */
 903         0x09,       /*  __u8  if_bInterfaceClass; HUB_CLASSCODE */
 904         0x00,       /*  __u8  if_bInterfaceSubClass; */
 905         0x00,       /*  __u8  if_bInterfaceProtocol; */
 906         0x00,       /*  __u8  if_iInterface; */
 907
 908         /* endpoint */
 909         0x07,       /*  __u8  ep_bLength; */
 910         0x05,       /*  __u8  ep_bDescriptorType; Endpoint */
 911         0x81,       /*  __u8  ep_bEndpointAddress; IN Endpoint 1 */
 912         0x03,       /*  __u8  ep_bmAttributes; Interrupt */
 913         0x02,       /*  __u16 ep_wMaxPacketSize; ((MAX_ROOT_PORTS + 1) / 8 */
 914         0x00,
 915         0xff        /*  __u8  ep_bInterval; 255 ms */
 916 };
 917
 918 static unsigned char root_hub_str_index0[] =
 919 {
 920         0x04,                   /*  __u8  bLength; */
 921         0x03,                   /*  __u8  bDescriptorType; String-descriptor */
 922         0x09,                   /*  __u8  lang ID */
 923         0x04,                   /*  __u8  lang ID */
 924 };
 925
 926 static unsigned char root_hub_str_index1[] =
 927 {
 928         28,                     /*  __u8  bLength; */
 929         0x03,                   /*  __u8  bDescriptorType; String-descriptor */
 930         'O',                    /*  __u8  Unicode */
 931         0,                              /*  __u8  Unicode */
 932         'H',                    /*  __u8  Unicode */
 933         0,                              /*  __u8  Unicode */
 934         'C',                    /*  __u8  Unicode */
 935         0,                              /*  __u8  Unicode */
 936         'I',                    /*  __u8  Unicode */
 937         0,                              /*  __u8  Unicode */
 938         ' ',                    /*  __u8  Unicode */
 939         0,                              /*  __u8  Unicode */
 940         'R',                    /*  __u8  Unicode */
 941         0,                              /*  __u8  Unicode */
 942         'o',                    /*  __u8  Unicode */
 943         0,                              /*  __u8  Unicode */
 944         'o',                    /*  __u8  Unicode */
 945         0,                              /*  __u8  Unicode */
 946         't',                    /*  __u8  Unicode */
 947         0,                              /*  __u8  Unicode */
 948         ' ',                    /*  __u8  Unicode */
 949         0,                              /*  __u8  Unicode */
 950         'H',                    /*  __u8  Unicode */
 951         0,                              /*  __u8  Unicode */
 952         'u',                    /*  __u8  Unicode */
 953         0,                              /*  __u8  Unicode */
 954         'b',                    /*  __u8  Unicode */
 955         0,                              /*  __u8  Unicode */
 956 };
 957
 958 /* Hub class-specific descriptor is constructed dynamically */
 959
 960
 961 /*-------------------------------------------------------------------------*/
 962
 963 #define OK(x)                   len = (x); break
 964 #ifdef DEBUG
 965 #define WR_RH_STAT(x)           {info("WR:status %#8x", (x));writel((x), &gohci.regs->roothub.status);}
 966 #define WR_RH_PORTSTAT(x)       {info("WR:portstatus[%d] %#8x", wIndex-1, (x));writel((x), &gohci.regs->roothub.portstatus[wIndex-1]);}
 967 #else
 968 #define WR_RH_STAT(x)           writel((x), &gohci.regs->roothub.status)
 969 #define WR_RH_PORTSTAT(x)       writel((x), &gohci.regs->roothub.portstatus[wIndex-1])
 970 #endif
 971 #define RD_RH_STAT              roothub_status(&gohci)
 972 #define RD_RH_PORTSTAT          roothub_portstatus(&gohci,wIndex-1)
 973
 974 /* request to virtual root hub */
 975
 976 int rh_check_port_status(ohci_t *controller)
 977 {
 978         __u32 temp, ndp, i;
 979         int res;
 980
 981         res = -1;
 982         temp = roothub_a (controller);
 983         ndp = (temp & RH_A_NDP);
 984         for (i = 0; i < ndp; i++) {
 985                 temp = roothub_portstatus (controller, i);
 986                 /* check for a device disconnect */
 987                 if (((temp & (RH_PS_PESC | RH_PS_CSC)) ==
 988                         (RH_PS_PESC | RH_PS_CSC)) &&
 989                         ((temp & RH_PS_CCS) == 0)) {
 990                         res = i;
 991                         break;
 992                 }
 993         }
 994         return res;
 995 }
 996
 997 static int ohci_submit_rh_msg(struct usb_device *dev, unsigned long pipe,
 998                 void *buffer, int transfer_len, struct devrequest *cmd)
 999 {
1000         void * data = buffer;
1001         int leni = transfer_len;
1002         int len = 0;
1003         int stat = 0;
1004         __u32 datab[4];
1005         __u8 *data_buf = (__u8 *)datab;
1006         __u16 bmRType_bReq;
1007         __u16 wValue;
1008         __u16 wIndex;
1009         __u16 wLength;
1010
1011 #ifdef DEBUG
1012 urb_priv.actual_length = 0;
1013 pkt_print(dev, pipe, buffer, transfer_len, cmd, "SUB(rh)", usb_pipein(pipe));
1014 #endif
1015         if ((pipe & PIPE_INTERRUPT) == PIPE_INTERRUPT) {
1016                 info("Root-Hub submit IRQ: NOT implemented");
1017                 return 0;
1018         }
1019
1020         bmRType_bReq  = cmd->requesttype | (cmd->request << 8);
1021         wValue        = m16_swap (cmd->value);
1022         wIndex        = m16_swap (cmd->index);
1023         wLength       = m16_swap (cmd->length);
1024
1025         info("Root-Hub: adr: %2x cmd(%1x): %08x %04x %04x %04x",
1026                 dev->devnum, 8, bmRType_bReq, wValue, wIndex, wLength);
1027
1028         switch (bmRType_bReq) {
1029         /* Request Destination:
1030            without flags: Device,
1031            RH_INTERFACE: interface,
1032            RH_ENDPOINT: endpoint,
1033            RH_CLASS means HUB here,
1034            RH_OTHER | RH_CLASS  almost ever means HUB_PORT here
1035         */
1036
1037         case RH_GET_STATUS:
1038                         *(__u16 *) data_buf = m16_swap (1); OK (2);
1039         case RH_GET_STATUS | RH_INTERFACE:
1040                         *(__u16 *) data_buf = m16_swap (0); OK (2);
1041         case RH_GET_STATUS | RH_ENDPOINT:
1042                         *(__u16 *) data_buf = m16_swap (0); OK (2);
1043         case RH_GET_STATUS | RH_CLASS:
1044                         *(__u32 *) data_buf = m32_swap (
1045                                 RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE));
1046                         OK (4);
1047         case RH_GET_STATUS | RH_OTHER | RH_CLASS:
1048                         *(__u32 *) data_buf = m32_swap (RD_RH_PORTSTAT); OK (4);
1049
1050         case RH_CLEAR_FEATURE | RH_ENDPOINT:
1051                 switch (wValue) {
1052                         case (RH_ENDPOINT_STALL): OK (0);
1053                 }
1054                 break;
1055
1056         case RH_CLEAR_FEATURE | RH_CLASS:
1057                 switch (wValue) {
1058                         case RH_C_HUB_LOCAL_POWER:
1059                                 OK(0);
1060                         case (RH_C_HUB_OVER_CURRENT):
1061                                         WR_RH_STAT(RH_HS_OCIC); OK (0);
1062                 }
1063                 break;
1064
1065         case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
1066                 switch (wValue) {
1067                         case (RH_PORT_ENABLE):
1068                                         WR_RH_PORTSTAT (RH_PS_CCS ); OK (0);
1069                         case (RH_PORT_SUSPEND):
1070                                         WR_RH_PORTSTAT (RH_PS_POCI); OK (0);
1071                         case (RH_PORT_POWER):
1072                                         WR_RH_PORTSTAT (RH_PS_LSDA); OK (0);
1073                         case (RH_C_PORT_CONNECTION):
1074                                         WR_RH_PORTSTAT (RH_PS_CSC ); OK (0);
1075                         case (RH_C_PORT_ENABLE):
1076                                         WR_RH_PORTSTAT (RH_PS_PESC); OK (0);
1077                         case (RH_C_PORT_SUSPEND):
1078                                         WR_RH_PORTSTAT (RH_PS_PSSC); OK (0);
1079                         case (RH_C_PORT_OVER_CURRENT):
1080                                         WR_RH_PORTSTAT (RH_PS_OCIC); OK (0);
1081                         case (RH_C_PORT_RESET):
1082                                         WR_RH_PORTSTAT (RH_PS_PRSC); OK (0);
1083                 }
1084                 break;
1085
1086         case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
1087                 switch (wValue) {
1088                         case (RH_PORT_SUSPEND):
1089                                         WR_RH_PORTSTAT (RH_PS_PSS ); OK (0);
1090                         case (RH_PORT_RESET): /* BUG IN HUP CODE *********/
1091                                         if (RD_RH_PORTSTAT & RH_PS_CCS)
1092                                             WR_RH_PORTSTAT (RH_PS_PRS);
1093                                         OK (0);
1094                         case (RH_PORT_POWER):
1095                                         WR_RH_PORTSTAT (RH_PS_PPS ); OK (0);
1096                         case (RH_PORT_ENABLE): /* BUG IN HUP CODE *********/
1097                                         if (RD_RH_PORTSTAT & RH_PS_CCS)
1098                                             WR_RH_PORTSTAT (RH_PS_PES );
1099                                         OK (0);
1100                 }
1101                 break;
1102
1103         case RH_SET_ADDRESS: gohci.rh.devnum = wValue; OK(0);
1104
1105         case RH_GET_DESCRIPTOR:
1106                 switch ((wValue & 0xff00) >> 8) {
1107                         case (0x01): /* device descriptor */
1108                                 len = min_t(unsigned int,
1109                                           leni,
1110                                           min_t(unsigned int,
1111                                               sizeof (root_hub_dev_des),
1112                                               wLength));
1113                                 data_buf = root_hub_dev_des; OK(len);
1114                         case (0x02): /* configuration descriptor */
1115                                 len = min_t(unsigned int,
1116                                           leni,
1117                                           min_t(unsigned int,
1118                                               sizeof (root_hub_config_des),
1119                                               wLength));
1120                                 data_buf = root_hub_config_des; OK(len);
1121                         case (0x03): /* string descriptors */
1122                                 if(wValue==0x0300) {
1123                                         len = min_t(unsigned int,
1124                                                   leni,
1125                                                   min_t(unsigned int,
1126                                                       sizeof (root_hub_str_index0),
1127                                                       wLength));
1128                                         data_buf = root_hub_str_index0;
1129                                         OK(len);
1130                                 }
1131                                 if(wValue==0x0301) {
1132                                         len = min_t(unsigned int,
1133                                                   leni,
1134                                                   min_t(unsigned int,
1135                                                       sizeof (root_hub_str_index1),
1136                                                       wLength));
1137                                         data_buf = root_hub_str_index1;
1138                                         OK(len);
1139                         }
1140                         default:
1141                                 stat = USB_ST_STALLED;
1142                 }
1143                 break;
1144
1145         case RH_GET_DESCRIPTOR | RH_CLASS:
1146             {
1147                     __u32 temp = roothub_a (&gohci);
1148
1149                     data_buf [0] = 9;           /* min length; */
1150                     data_buf [1] = 0x29;
1151                     data_buf [2] = temp & RH_A_NDP;
1152                     data_buf [3] = 0;
1153                     if (temp & RH_A_PSM)        /* per-port power switching? */
1154                         data_buf [3] |= 0x1;
1155                     if (temp & RH_A_NOCP)       /* no overcurrent reporting? */
1156                         data_buf [3] |= 0x10;
1157                     else if (temp & RH_A_OCPM)  /* per-port overcurrent reporting? */
1158                         data_buf [3] |= 0x8;
1159
1160                     /* corresponds to data_buf[4-7] */
1161                     datab [1] = 0;
1162                     data_buf [5] = (temp & RH_A_POTPGT) >> 24;
1163                     temp = roothub_b (&gohci);
1164                     data_buf [7] = temp & RH_B_DR;
1165                     if (data_buf [2] < 7) {
1166                         data_buf [8] = 0xff;
1167                     } else {
1168                         data_buf [0] += 2;
1169                         data_buf [8] = (temp & RH_B_DR) >> 8;
1170                         data_buf [10] = data_buf [9] = 0xff;
1171                     }
1172
1173                     len = min_t(unsigned int, leni,
1174                               min_t(unsigned int, data_buf [0], wLength));
1175                     OK (len);
1176                 }
1177
1178         case RH_GET_CONFIGURATION:      *(__u8 *) data_buf = 0x01; OK (1);
1179
1180         case RH_SET_CONFIGURATION:      WR_RH_STAT (0x10000); OK (0);
1181
1182         default:
1183                 dbg ("unsupported root hub command");
1184                 stat = USB_ST_STALLED;
1185         }
1186
1187 #ifdef  DEBUG
1188         ohci_dump_roothub (&gohci, 1);
1189 #endif
1190
1191         len = min_t(int, len, leni);
1192         if (data != data_buf)
1193             memcpy (data, data_buf, len);
1194         dev->act_len = len;
1195         dev->status = stat;
1196
1197 #ifdef DEBUG
1198         if (transfer_len)
1199                 urb_priv.actual_length = transfer_len;
1200         pkt_print(dev, pipe, buffer, transfer_len, cmd, "RET(rh)", 0/*usb_pipein(pipe)*/);
1201 #endif
1202
1203         return stat;
1204 }
1205
1206 /*-------------------------------------------------------------------------*/
1207
1208 /* common code for handling submit messages - used for all but root hub */
1209 /* accesses. */
1210 int submit_common_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1211                 int transfer_len, struct devrequest *setup, int interval)
1212 {
1213         int stat = 0;
1214         int maxsize = usb_maxpacket(dev, pipe);
1215         int timeout;
1216
1217         /* device pulled? Shortcut the action. */
1218         if (devgone == dev) {
1219                 dev->status = USB_ST_CRC_ERR;
1220                 return 0;
1221         }
1222
1223 #ifdef DEBUG
1224         urb_priv.actual_length = 0;
1225         pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB", usb_pipein(pipe));
1226 #endif
1227         if (!maxsize) {
1228                 err("submit_common_message: pipesize for pipe %lx is zero",
1229                         pipe);
1230                 return -1;
1231         }
1232
1233         if (sohci_submit_job(dev, pipe, buffer, transfer_len, setup, interval) < 0) {
1234                 err("sohci_submit_job failed");
1235                 return -1;
1236         }
1237
1238         /* allow more time for a BULK device to react - some are slow */
1239 #define BULK_TO  5000   /* timeout in milliseconds */
1240         if (usb_pipetype (pipe) == PIPE_BULK)
1241                 timeout = BULK_TO;
1242         else
1243                 timeout = 100;
1244
1245         /* wait for it to complete */
1246         for (;;) {
1247                 /* check whether the controller is done */
1248                 stat = hc_interrupt();
1249                 if (stat < 0) {
1250                         stat = USB_ST_CRC_ERR;
1251                         break;
1252                 }
1253                 if (stat >= 0 && stat < 0xff) {
1254                         /* 0xff is returned for an SF-interrupt */
1255                         break;
1256                 }
1257                 if (--timeout) {
1258                         wait_ms(1);
1259                 } else {
1260                         err("CTL:TIMEOUT ");
1261                         stat = USB_ST_CRC_ERR;
1262                         break;
1263                 }
1264         }
1265         /* we got an Root Hub Status Change interrupt */
1266         if (got_rhsc) {
1267 #ifdef DEBUG
1268                 ohci_dump_roothub (&gohci, 1);
1269 #endif
1270                 got_rhsc = 0;
1271                 /* abuse timeout */
1272                 timeout = rh_check_port_status(&gohci);
1273                 if (timeout >= 0) {
1274 #if 0 /* this does nothing useful, but leave it here in case that changes */
1275                         /* the called routine adds 1 to the passed value */
1276                         usb_hub_port_connect_change(gohci.rh.dev, timeout - 1);
1277 #endif
1278                         /*
1279                          * XXX
1280                          * This is potentially dangerous because it assumes
1281                          * that only one device is ever plugged in!
1282                          */
1283                         devgone = dev;
1284                 }
1285         }
1286
1287         dev->status = stat;
1288         dev->act_len = transfer_len;
1289
1290 #ifdef DEBUG
1291         pkt_print(dev, pipe, buffer, transfer_len, setup, "RET(ctlr)", usb_pipein(pipe));
1292 #endif
1293
1294         /* free TDs in urb_priv */
1295         urb_free_priv (&urb_priv);
1296         return 0;
1297 }
1298
1299 /* submit routines called from usb.c */
1300 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1301                 int transfer_len)
1302 {
1303         info("submit_bulk_msg");
1304         return submit_common_msg(dev, pipe, buffer, transfer_len, NULL, 0);
1305 }
1306
1307 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1308                 int transfer_len, struct devrequest *setup)
1309 {
1310         int maxsize = usb_maxpacket(dev, pipe);
1311
1312         info("submit_control_msg");
1313 #ifdef DEBUG
1314         urb_priv.actual_length = 0;
1315         pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB", usb_pipein(pipe));
1316 #endif
1317         if (!maxsize) {
1318                 err("submit_control_message: pipesize for pipe %lx is zero",
1319                         pipe);
1320                 return -1;
1321         }
1322         if (((pipe >> 8) & 0x7f) == gohci.rh.devnum) {
1323                 gohci.rh.dev = dev;
1324                 /* root hub - redirect */
1325                 return ohci_submit_rh_msg(dev, pipe, buffer, transfer_len,
1326                         setup);
1327         }
1328
1329         return submit_common_msg(dev, pipe, buffer, transfer_len, setup, 0);
1330 }
1331
1332 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1333                 int transfer_len, int interval)
1334 {
1335         info("submit_int_msg");
1336         return -1;
1337 }
1338
1339 /*-------------------------------------------------------------------------*
1340  * HC functions
1341  *-------------------------------------------------------------------------*/
1342
1343 /* reset the HC and BUS */
1344
1345 static int hc_reset (ohci_t *ohci)
1346 {
1347         int timeout = 30;
1348         int smm_timeout = 50; /* 0,5 sec */
1349
1350         if (readl (&ohci->regs->control) & OHCI_CTRL_IR) { /* SMM owns the HC */
1351                 writel (OHCI_OCR, &ohci->regs->cmdstatus); /* request ownership */
1352                 info("USB HC TakeOver from SMM");
1353                 while (readl (&ohci->regs->control) & OHCI_CTRL_IR) {
1354                         wait_ms (10);
1355                         if (--smm_timeout == 0) {
1356                                 err("USB HC TakeOver failed!");
1357                                 return -1;
1358                         }
1359                 }
1360         }
1361
1362         /* Disable HC interrupts */
1363         writel (OHCI_INTR_MIE, &ohci->regs->intrdisable);
1364
1365         dbg("USB HC reset_hc usb-%s: ctrl = 0x%X ;",
1366                 ohci->slot_name,
1367                 readl (&ohci->regs->control));
1368
1369         /* Reset USB (needed by some controllers) */
1370         ohci->hc_control = 0;
1371         writel (ohci->hc_control, &ohci->regs->control);
1372
1373         /* HC Reset requires max 10 us delay */
1374         writel (OHCI_HCR,  &ohci->regs->cmdstatus);
1375         while ((readl (&ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
1376                 if (--timeout == 0) {
1377                         err("USB HC reset timed out!");
1378                         return -1;
1379                 }
1380                 udelay (1);
1381         }
1382         return 0;
1383 }
1384
1385 /*-------------------------------------------------------------------------*/
1386
1387 /* Start an OHCI controller, set the BUS operational
1388  * enable interrupts
1389  * connect the virtual root hub */
1390
1391 static int hc_start (ohci_t * ohci)
1392 {
1393         __u32 mask;
1394         unsigned int fminterval;
1395
1396         ohci->disabled = 1;
1397
1398         /* Tell the controller where the control and bulk lists are
1399          * The lists are empty now. */
1400
1401         writel (0, &ohci->regs->ed_controlhead);
1402         writel (0, &ohci->regs->ed_bulkhead);
1403
1404         writel ((__u32)ohci->hcca, &ohci->regs->hcca); /* a reset clears this */
1405
1406         fminterval = 0x2edf;
1407         writel ((fminterval * 9) / 10, &ohci->regs->periodicstart);
1408         fminterval |= ((((fminterval - 210) * 6) / 7) << 16);
1409         writel (fminterval, &ohci->regs->fminterval);
1410         writel (0x628, &ohci->regs->lsthresh);
1411
1412         /* start controller operations */
1413         ohci->hc_control = OHCI_CONTROL_INIT | OHCI_USB_OPER;
1414         ohci->disabled = 0;
1415         writel (ohci->hc_control, &ohci->regs->control);
1416
1417         /* disable all interrupts */
1418         mask = (OHCI_INTR_SO | OHCI_INTR_WDH | OHCI_INTR_SF | OHCI_INTR_RD |
1419                         OHCI_INTR_UE | OHCI_INTR_FNO | OHCI_INTR_RHSC |
1420                         OHCI_INTR_OC | OHCI_INTR_MIE);
1421         writel (mask, &ohci->regs->intrdisable);
1422         /* clear all interrupts */
1423         mask &= ~OHCI_INTR_MIE;
1424         writel (mask, &ohci->regs->intrstatus);
1425         /* Choose the interrupts we care about now  - but w/o MIE */
1426         mask = OHCI_INTR_RHSC | OHCI_INTR_UE | OHCI_INTR_WDH | OHCI_INTR_SO;
1427         writel (mask, &ohci->regs->intrenable);
1428
1429 #ifdef  OHCI_USE_NPS
1430         /* required for AMD-756 and some Mac platforms */
1431         writel ((roothub_a (ohci) | RH_A_NPS) & ~RH_A_PSM,
1432                 &ohci->regs->roothub.a);
1433         writel (RH_HS_LPSC, &ohci->regs->roothub.status);
1434 #endif  /* OHCI_USE_NPS */
1435
1436 #define mdelay(n) ({unsigned long msec=(n); while (msec--) udelay(1000);})
1437         /* POTPGT delay is bits 24-31, in 2 ms units. */
1438         mdelay ((roothub_a (ohci) >> 23) & 0x1fe);
1439
1440         /* connect the virtual root hub */
1441         ohci->rh.devnum = 0;
1442
1443         return 0;
1444 }
1445
1446 /*-------------------------------------------------------------------------*/
1447
1448 /* an interrupt happens */
1449
1450 static int
1451 hc_interrupt (void)
1452 {
1453         ohci_t *ohci = &gohci;
1454         struct ohci_regs *regs = ohci->regs;
1455         int ints;
1456         int stat = -1;
1457
1458         if ((ohci->hcca->done_head != 0) && !(ohci_cpu_to_le32 (ohci->hcca->done_head) & 0x01)) {
1459                 ints =  OHCI_INTR_WDH;
1460         } else {
1461                 ints = readl (&regs->intrstatus);
1462         }
1463
1464         /* dbg("Interrupt: %x frame: %x", ints, le16_to_cpu (ohci->hcca->frame_no)); */
1465
1466         if (ints & OHCI_INTR_RHSC) {
1467                 got_rhsc = 1;
1468         }
1469
1470         if (ints & OHCI_INTR_UE) {
1471                 ohci->disabled++;
1472                 err ("OHCI Unrecoverable Error, controller usb-%s disabled",
1473                         ohci->slot_name);
1474                 /* e.g. due to PCI Master/Target Abort */
1475
1476 #ifdef  DEBUG
1477                 ohci_dump (ohci, 1);
1478 #endif
1479                 /* FIXME: be optimistic, hope that bug won't repeat often. */
1480                 /* Make some non-interrupt context restart the controller. */
1481                 /* Count and limit the retries though; either hardware or */
1482                 /* software errors can go forever... */
1483                 hc_reset (ohci);
1484                 return -1;
1485         }
1486
1487         if (ints & OHCI_INTR_WDH) {
1488                 writel (OHCI_INTR_WDH, &regs->intrdisable);
1489                 stat = dl_done_list (&gohci, dl_reverse_done_list (&gohci));
1490                 writel (OHCI_INTR_WDH, &regs->intrenable);
1491         }
1492
1493         if (ints & OHCI_INTR_SO) {
1494                 dbg("USB Schedule overrun\n");
1495                 writel (OHCI_INTR_SO, &regs->intrenable);
1496                 stat = -1;
1497         }
1498
1499         /* FIXME:  this assumes SOF (1/ms) interrupts don't get lost... */
1500         if (ints & OHCI_INTR_SF) {
1501                 unsigned int frame = ohci_cpu_to_le16 (ohci->hcca->frame_no) & 1;
1502                 writel (OHCI_INTR_SF, &regs->intrdisable);
1503                 if (ohci->ed_rm_list[frame] != NULL)
1504                         writel (OHCI_INTR_SF, &regs->intrenable);
1505                 stat = 0xff;
1506         }
1507
1508         writel (ints, &regs->intrstatus);
1509         return stat;
1510 }
1511
1512 /*-------------------------------------------------------------------------*/
1513
1514 /*-------------------------------------------------------------------------*/
1515
1516 /* De-allocate all resources.. */
1517
1518 static void hc_release_ohci (ohci_t *ohci)
1519 {
1520         dbg ("USB HC release ohci usb-%s", ohci->slot_name);
1521
1522         if (!ohci->disabled)
1523                 hc_reset (ohci);
1524 }
1525
1526 /*-------------------------------------------------------------------------*/
1527
1528 /*
1529  * low level initalisation routine, called from usb.c
1530  */
1531 static char ohci_inited = 0;
1532
1533 int usb_lowlevel_init(void)
1534 {
1535
1536         /* Set the USB Clock                                                 */
1537         *(vu_long *)MPC5XXX_CDM_48_FDC = CONFIG_USB_CLOCK;
1538
1539         /* remove all USB bits first before ORing in ours */
1540         *(vu_long *)MPC5XXX_GPS_PORT_CONFIG &= ~0x00807000;
1541
1542         /* Activate USB port                                                 */
1543         *(vu_long *)MPC5XXX_GPS_PORT_CONFIG |= CONFIG_USB_CONFIG;
1544
1545         memset (&gohci, 0, sizeof (ohci_t));
1546         memset (&urb_priv, 0, sizeof (urb_priv_t));
1547
1548         /* align the storage */
1549         if ((__u32)&ghcca[0] & 0xff) {
1550                 err("HCCA not aligned!!");
1551                 return -1;
1552         }
1553         phcca = &ghcca[0];
1554         info("aligned ghcca %p", phcca);
1555         memset(&ohci_dev, 0, sizeof(struct ohci_device));
1556         if ((__u32)&ohci_dev.ed[0] & 0x7) {
1557                 err("EDs not aligned!!");
1558                 return -1;
1559         }
1560         memset(gtd, 0, sizeof(td_t) * (NUM_TD + 1));
1561         if ((__u32)gtd & 0x7) {
1562                 err("TDs not aligned!!");
1563                 return -1;
1564         }
1565         ptd = gtd;
1566         gohci.hcca = phcca;
1567         memset (phcca, 0, sizeof (struct ohci_hcca));
1568
1569         gohci.disabled = 1;
1570         gohci.sleeping = 0;
1571         gohci.irq = -1;
1572         gohci.regs = (struct ohci_regs *)MPC5XXX_USB;
1573
1574         gohci.flags = 0;
1575         gohci.slot_name = "mpc5200";
1576
1577         if (hc_reset (&gohci) < 0) {
1578                 hc_release_ohci (&gohci);
1579                 return -1;
1580         }
1581
1582         if (hc_start (&gohci) < 0) {
1583                 err ("can't start usb-%s", gohci.slot_name);
1584                 hc_release_ohci (&gohci);
1585                 return -1;
1586         }
1587
1588 #ifdef  DEBUG
1589         ohci_dump (&gohci, 1);
1590 #endif
1591         ohci_inited = 1;
1592         return 0;
1593 }
1594
1595 int usb_lowlevel_stop(void)
1596 {
1597         /* this gets called really early - before the controller has */
1598         /* even been initialized! */
1599         if (!ohci_inited)
1600                 return 0;
1601         /* TODO release any interrupts, etc. */
1602         /* call hc_release_ohci() here ? */
1603         hc_reset (&gohci);
1604         return 0;
1605 }
1606
1607 #endif /* CONFIG_USB_OHCI */