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 tdINFO, tdBE, tdCBP;
 757         urb_priv_t *lurb_priv = &urb_priv;
 758
 759         tdINFO = ohci_cpu_to_le32 (td->hwINFO);
 760         tdBE   = ohci_cpu_to_le32 (td->hwBE);
 761         tdCBP  = ohci_cpu_to_le32 (td->hwCBP);
 762
 763
 764         if (!(usb_pipecontrol(lurb_priv->pipe) &&
 765             ((td->index == 0) || (td->index == lurb_priv->length - 1)))) {
 766                 if (tdBE != 0) {
 767                         if (td->hwCBP == 0)
 768                                 lurb_priv->actual_length += tdBE - td->data + 1;
 769                         else
 770                                 lurb_priv->actual_length += tdCBP - td->data;
 771                 }
 772         }
 773 }
 774
 775 /*-------------------------------------------------------------------------*/
 776
 777 /* replies to the request have to be on a FIFO basis so
 778  * we reverse the reversed done-list */
 779
 780 static td_t * dl_reverse_done_list (ohci_t *ohci)
 781 {
 782         __u32 td_list_hc;
 783         td_t *td_rev = NULL;
 784         td_t *td_list = NULL;
 785         urb_priv_t *lurb_priv = NULL;
 786
 787         td_list_hc = ohci_cpu_to_le32 (ohci->hcca->done_head) & 0xfffffff0;
 788         ohci->hcca->done_head = 0;
 789
 790         while (td_list_hc) {
 791                 td_list = (td_t *)td_list_hc;
 792
 793                 if (TD_CC_GET (ohci_cpu_to_le32 (td_list->hwINFO))) {
 794                         lurb_priv = &urb_priv;
 795                         dbg(" USB-error/status: %x : %p",
 796                                         TD_CC_GET (ohci_cpu_to_le32 (td_list->hwINFO)), td_list);
 797                         if (td_list->ed->hwHeadP & ohci_cpu_to_le32 (0x1)) {
 798                                 if (lurb_priv && ((td_list->index + 1) < lurb_priv->length)) {
 799                                         td_list->ed->hwHeadP =
 800                                                 (lurb_priv->td[lurb_priv->length - 1]->hwNextTD & ohci_cpu_to_le32 (0xfffffff0)) |
 801                                                                         (td_list->ed->hwHeadP & ohci_cpu_to_le32 (0x2));
 802                                         lurb_priv->td_cnt += lurb_priv->length - td_list->index - 1;
 803                                 } else
 804                                         td_list->ed->hwHeadP &= ohci_cpu_to_le32 (0xfffffff2);
 805                         }
 806 #ifdef CONFIG_MPC5200
 807                         td_list->hwNextTD = 0;
 808 #endif
 809                 }
 810
 811                 td_list->next_dl_td = td_rev;
 812                 td_rev = td_list;
 813                 td_list_hc = ohci_cpu_to_le32 (td_list->hwNextTD) & 0xfffffff0;
 814         }
 815         return td_list;
 816 }
 817
 818 /*-------------------------------------------------------------------------*/
 819
 820 /* td done list */
 821 static int dl_done_list (ohci_t *ohci, td_t *td_list)
 822 {
 823         td_t *td_list_next = NULL;
 824         ed_t *ed;
 825         int cc = 0;
 826         int stat = 0;
 827         /* urb_t *urb; */
 828         urb_priv_t *lurb_priv;
 829         __u32 tdINFO, edHeadP, edTailP;
 830
 831         while (td_list) {
 832                 td_list_next = td_list->next_dl_td;
 833
 834                 lurb_priv = &urb_priv;
 835                 tdINFO = ohci_cpu_to_le32 (td_list->hwINFO);
 836
 837                 ed = td_list->ed;
 838
 839                 dl_transfer_length(td_list);
 840
 841                 /* error code of transfer */
 842                 cc = TD_CC_GET (tdINFO);
 843                 if (++(lurb_priv->td_cnt) == lurb_priv->length) {
 844                         if ((ed->state & (ED_OPER | ED_UNLINK))
 845                                         && (lurb_priv->state != URB_DEL)) {
 846                                 dbg("ConditionCode %#x", cc);
 847                                 stat = cc_to_error[cc];
 848                                 urb_finished = 1;
 849                         }
 850                 }
 851
 852                 if (ed->state != ED_NEW) {
 853                         edHeadP = ohci_cpu_to_le32 (ed->hwHeadP) & 0xfffffff0;
 854                         edTailP = ohci_cpu_to_le32 (ed->hwTailP);
 855
 856                         /* unlink eds if they are not busy */
 857                         if ((edHeadP == edTailP) && (ed->state == ED_OPER))
 858                                 ep_unlink (ohci, ed);
 859                 }
 860
 861                 td_list = td_list_next;
 862         }
 863         return stat;
 864 }
 865
 866 /*-------------------------------------------------------------------------*
 867  * Virtual Root Hub
 868  *-------------------------------------------------------------------------*/
 869
 870 /* Device descriptor */
 871 static __u8 root_hub_dev_des[] =
 872 {
 873         0x12,       /*  __u8  bLength; */
 874         0x01,       /*  __u8  bDescriptorType; Device */
 875         0x10,       /*  __u16 bcdUSB; v1.1 */
 876         0x01,
 877         0x09,       /*  __u8  bDeviceClass; HUB_CLASSCODE */
 878         0x00,       /*  __u8  bDeviceSubClass; */
 879         0x00,       /*  __u8  bDeviceProtocol; */
 880         0x08,       /*  __u8  bMaxPacketSize0; 8 Bytes */
 881         0x00,       /*  __u16 idVendor; */
 882         0x00,
 883         0x00,       /*  __u16 idProduct; */
 884         0x00,
 885         0x00,       /*  __u16 bcdDevice; */
 886         0x00,
 887         0x00,       /*  __u8  iManufacturer; */
 888         0x01,       /*  __u8  iProduct; */
 889         0x00,       /*  __u8  iSerialNumber; */
 890         0x01        /*  __u8  bNumConfigurations; */
 891 };
 892
 893
 894 /* Configuration descriptor */
 895 static __u8 root_hub_config_des[] =
 896 {
 897         0x09,       /*  __u8  bLength; */
 898         0x02,       /*  __u8  bDescriptorType; Configuration */
 899         0x19,       /*  __u16 wTotalLength; */
 900         0x00,
 901         0x01,       /*  __u8  bNumInterfaces; */
 902         0x01,       /*  __u8  bConfigurationValue; */
 903         0x00,       /*  __u8  iConfiguration; */
 904         0x40,       /*  __u8  bmAttributes;
 905                  Bit 7: Bus-powered, 6: Self-powered, 5 Remote-wakwup, 4..0: resvd */
 906         0x00,       /*  __u8  MaxPower; */
 907
 908         /* interface */
 909         0x09,       /*  __u8  if_bLength; */
 910         0x04,       /*  __u8  if_bDescriptorType; Interface */
 911         0x00,       /*  __u8  if_bInterfaceNumber; */
 912         0x00,       /*  __u8  if_bAlternateSetting; */
 913         0x01,       /*  __u8  if_bNumEndpoints; */
 914         0x09,       /*  __u8  if_bInterfaceClass; HUB_CLASSCODE */
 915         0x00,       /*  __u8  if_bInterfaceSubClass; */
 916         0x00,       /*  __u8  if_bInterfaceProtocol; */
 917         0x00,       /*  __u8  if_iInterface; */
 918
 919         /* endpoint */
 920         0x07,       /*  __u8  ep_bLength; */
 921         0x05,       /*  __u8  ep_bDescriptorType; Endpoint */
 922         0x81,       /*  __u8  ep_bEndpointAddress; IN Endpoint 1 */
 923         0x03,       /*  __u8  ep_bmAttributes; Interrupt */
 924         0x02,       /*  __u16 ep_wMaxPacketSize; ((MAX_ROOT_PORTS + 1) / 8 */
 925         0x00,
 926         0xff        /*  __u8  ep_bInterval; 255 ms */
 927 };
 928
 929 static unsigned char root_hub_str_index0[] =
 930 {
 931         0x04,                   /*  __u8  bLength; */
 932         0x03,                   /*  __u8  bDescriptorType; String-descriptor */
 933         0x09,                   /*  __u8  lang ID */
 934         0x04,                   /*  __u8  lang ID */
 935 };
 936
 937 static unsigned char root_hub_str_index1[] =
 938 {
 939         28,                     /*  __u8  bLength; */
 940         0x03,                   /*  __u8  bDescriptorType; String-descriptor */
 941         'O',                    /*  __u8  Unicode */
 942         0,                              /*  __u8  Unicode */
 943         'H',                    /*  __u8  Unicode */
 944         0,                              /*  __u8  Unicode */
 945         'C',                    /*  __u8  Unicode */
 946         0,                              /*  __u8  Unicode */
 947         'I',                    /*  __u8  Unicode */
 948         0,                              /*  __u8  Unicode */
 949         ' ',                    /*  __u8  Unicode */
 950         0,                              /*  __u8  Unicode */
 951         'R',                    /*  __u8  Unicode */
 952         0,                              /*  __u8  Unicode */
 953         'o',                    /*  __u8  Unicode */
 954         0,                              /*  __u8  Unicode */
 955         'o',                    /*  __u8  Unicode */
 956         0,                              /*  __u8  Unicode */
 957         't',                    /*  __u8  Unicode */
 958         0,                              /*  __u8  Unicode */
 959         ' ',                    /*  __u8  Unicode */
 960         0,                              /*  __u8  Unicode */
 961         'H',                    /*  __u8  Unicode */
 962         0,                              /*  __u8  Unicode */
 963         'u',                    /*  __u8  Unicode */
 964         0,                              /*  __u8  Unicode */
 965         'b',                    /*  __u8  Unicode */
 966         0,                              /*  __u8  Unicode */
 967 };
 968
 969 /* Hub class-specific descriptor is constructed dynamically */
 970
 971
 972 /*-------------------------------------------------------------------------*/
 973
 974 #define OK(x)                   len = (x); break
 975 #ifdef DEBUG
 976 #define WR_RH_STAT(x)           {info("WR:status %#8x", (x));writel((x), &gohci.regs->roothub.status);}
 977 #define WR_RH_PORTSTAT(x)       {info("WR:portstatus[%d] %#8x", wIndex-1, (x));writel((x), &gohci.regs->roothub.portstatus[wIndex-1]);}
 978 #else
 979 #define WR_RH_STAT(x)           writel((x), &gohci.regs->roothub.status)
 980 #define WR_RH_PORTSTAT(x)       writel((x), &gohci.regs->roothub.portstatus[wIndex-1])
 981 #endif
 982 #define RD_RH_STAT              roothub_status(&gohci)
 983 #define RD_RH_PORTSTAT          roothub_portstatus(&gohci,wIndex-1)
 984
 985 /* request to virtual root hub */
 986
 987 int rh_check_port_status(ohci_t *controller)
 988 {
 989         __u32 temp, ndp, i;
 990         int res;
 991
 992         res = -1;
 993         temp = roothub_a (controller);
 994         ndp = (temp & RH_A_NDP);
 995         for (i = 0; i < ndp; i++) {
 996                 temp = roothub_portstatus (controller, i);
 997                 /* check for a device disconnect */
 998                 if (((temp & (RH_PS_PESC | RH_PS_CSC)) ==
 999                         (RH_PS_PESC | RH_PS_CSC)) &&
1000                         ((temp & RH_PS_CCS) == 0)) {
1001                         res = i;
1002                         break;
1003                 }
1004         }
1005         return res;
1006 }
1007
1008 static int ohci_submit_rh_msg(struct usb_device *dev, unsigned long pipe,
1009                 void *buffer, int transfer_len, struct devrequest *cmd)
1010 {
1011         void * data = buffer;
1012         int leni = transfer_len;
1013         int len = 0;
1014         int stat = 0;
1015         __u32 datab[4];
1016         __u8 *data_buf = (__u8 *)datab;
1017         __u16 bmRType_bReq;
1018         __u16 wValue;
1019         __u16 wIndex;
1020         __u16 wLength;
1021
1022 #ifdef DEBUG
1023 urb_priv.actual_length = 0;
1024 pkt_print(dev, pipe, buffer, transfer_len, cmd, "SUB(rh)", usb_pipein(pipe));
1025 #endif
1026         if (usb_pipeint(pipe)) {
1027                 info("Root-Hub submit IRQ: NOT implemented");
1028                 return 0;
1029         }
1030
1031         bmRType_bReq  = cmd->requesttype | (cmd->request << 8);
1032         wValue        = m16_swap (cmd->value);
1033         wIndex        = m16_swap (cmd->index);
1034         wLength       = m16_swap (cmd->length);
1035
1036         info("Root-Hub: adr: %2x cmd(%1x): %08x %04x %04x %04x",
1037                 dev->devnum, 8, bmRType_bReq, wValue, wIndex, wLength);
1038
1039         switch (bmRType_bReq) {
1040         /* Request Destination:
1041            without flags: Device,
1042            RH_INTERFACE: interface,
1043            RH_ENDPOINT: endpoint,
1044            RH_CLASS means HUB here,
1045            RH_OTHER | RH_CLASS  almost ever means HUB_PORT here
1046         */
1047
1048         case RH_GET_STATUS:
1049                         *(__u16 *) data_buf = m16_swap (1); OK (2);
1050         case RH_GET_STATUS | RH_INTERFACE:
1051                         *(__u16 *) data_buf = m16_swap (0); OK (2);
1052         case RH_GET_STATUS | RH_ENDPOINT:
1053                         *(__u16 *) data_buf = m16_swap (0); OK (2);
1054         case RH_GET_STATUS | RH_CLASS:
1055                         *(__u32 *) data_buf = m32_swap (
1056                                 RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE));
1057                         OK (4);
1058         case RH_GET_STATUS | RH_OTHER | RH_CLASS:
1059                         *(__u32 *) data_buf = m32_swap (RD_RH_PORTSTAT); OK (4);
1060
1061         case RH_CLEAR_FEATURE | RH_ENDPOINT:
1062                 switch (wValue) {
1063                         case (RH_ENDPOINT_STALL): OK (0);
1064                 }
1065                 break;
1066
1067         case RH_CLEAR_FEATURE | RH_CLASS:
1068                 switch (wValue) {
1069                         case RH_C_HUB_LOCAL_POWER:
1070                                 OK(0);
1071                         case (RH_C_HUB_OVER_CURRENT):
1072                                         WR_RH_STAT(RH_HS_OCIC); OK (0);
1073                 }
1074                 break;
1075
1076         case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
1077                 switch (wValue) {
1078                         case (RH_PORT_ENABLE):
1079                                         WR_RH_PORTSTAT (RH_PS_CCS ); OK (0);
1080                         case (RH_PORT_SUSPEND):
1081                                         WR_RH_PORTSTAT (RH_PS_POCI); OK (0);
1082                         case (RH_PORT_POWER):
1083                                         WR_RH_PORTSTAT (RH_PS_LSDA); OK (0);
1084                         case (RH_C_PORT_CONNECTION):
1085                                         WR_RH_PORTSTAT (RH_PS_CSC ); OK (0);
1086                         case (RH_C_PORT_ENABLE):
1087                                         WR_RH_PORTSTAT (RH_PS_PESC); OK (0);
1088                         case (RH_C_PORT_SUSPEND):
1089                                         WR_RH_PORTSTAT (RH_PS_PSSC); OK (0);
1090                         case (RH_C_PORT_OVER_CURRENT):
1091                                         WR_RH_PORTSTAT (RH_PS_OCIC); OK (0);
1092                         case (RH_C_PORT_RESET):
1093                                         WR_RH_PORTSTAT (RH_PS_PRSC); OK (0);
1094                 }
1095                 break;
1096
1097         case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
1098                 switch (wValue) {
1099                         case (RH_PORT_SUSPEND):
1100                                         WR_RH_PORTSTAT (RH_PS_PSS ); OK (0);
1101                         case (RH_PORT_RESET): /* BUG IN HUP CODE *********/
1102                                         if (RD_RH_PORTSTAT & RH_PS_CCS)
1103                                             WR_RH_PORTSTAT (RH_PS_PRS);
1104                                         OK (0);
1105                         case (RH_PORT_POWER):
1106                                         WR_RH_PORTSTAT (RH_PS_PPS ); OK (0);
1107                         case (RH_PORT_ENABLE): /* BUG IN HUP CODE *********/
1108                                         if (RD_RH_PORTSTAT & RH_PS_CCS)
1109                                             WR_RH_PORTSTAT (RH_PS_PES );
1110                                         OK (0);
1111                 }
1112                 break;
1113
1114         case RH_SET_ADDRESS: gohci.rh.devnum = wValue; OK(0);
1115
1116         case RH_GET_DESCRIPTOR:
1117                 switch ((wValue & 0xff00) >> 8) {
1118                         case (0x01): /* device descriptor */
1119                                 len = min_t(unsigned int,
1120                                           leni,
1121                                           min_t(unsigned int,
1122                                               sizeof (root_hub_dev_des),
1123                                               wLength));
1124                                 data_buf = root_hub_dev_des; OK(len);
1125                         case (0x02): /* configuration descriptor */
1126                                 len = min_t(unsigned int,
1127                                           leni,
1128                                           min_t(unsigned int,
1129                                               sizeof (root_hub_config_des),
1130                                               wLength));
1131                                 data_buf = root_hub_config_des; OK(len);
1132                         case (0x03): /* string descriptors */
1133                                 if(wValue==0x0300) {
1134                                         len = min_t(unsigned int,
1135                                                   leni,
1136                                                   min_t(unsigned int,
1137                                                       sizeof (root_hub_str_index0),
1138                                                       wLength));
1139                                         data_buf = root_hub_str_index0;
1140                                         OK(len);
1141                                 }
1142                                 if(wValue==0x0301) {
1143                                         len = min_t(unsigned int,
1144                                                   leni,
1145                                                   min_t(unsigned int,
1146                                                       sizeof (root_hub_str_index1),
1147                                                       wLength));
1148                                         data_buf = root_hub_str_index1;
1149                                         OK(len);
1150                         }
1151                         default:
1152                                 stat = USB_ST_STALLED;
1153                 }
1154                 break;
1155
1156         case RH_GET_DESCRIPTOR | RH_CLASS:
1157             {
1158                     __u32 temp = roothub_a (&gohci);
1159
1160                     data_buf [0] = 9;           /* min length; */
1161                     data_buf [1] = 0x29;
1162                     data_buf [2] = temp & RH_A_NDP;
1163                     data_buf [3] = 0;
1164                     if (temp & RH_A_PSM)        /* per-port power switching? */
1165                         data_buf [3] |= 0x1;
1166                     if (temp & RH_A_NOCP)       /* no overcurrent reporting? */
1167                         data_buf [3] |= 0x10;
1168                     else if (temp & RH_A_OCPM)  /* per-port overcurrent reporting? */
1169                         data_buf [3] |= 0x8;
1170
1171                     /* corresponds to data_buf[4-7] */
1172                     datab [1] = 0;
1173                     data_buf [5] = (temp & RH_A_POTPGT) >> 24;
1174                     temp = roothub_b (&gohci);
1175                     data_buf [7] = temp & RH_B_DR;
1176                     if (data_buf [2] < 7) {
1177                         data_buf [8] = 0xff;
1178                     } else {
1179                         data_buf [0] += 2;
1180                         data_buf [8] = (temp & RH_B_DR) >> 8;
1181                         data_buf [10] = data_buf [9] = 0xff;
1182                     }
1183
1184                     len = min_t(unsigned int, leni,
1185                               min_t(unsigned int, data_buf [0], wLength));
1186                     OK (len);
1187                 }
1188
1189         case RH_GET_CONFIGURATION:      *(__u8 *) data_buf = 0x01; OK (1);
1190
1191         case RH_SET_CONFIGURATION:      WR_RH_STAT (0x10000); OK (0);
1192
1193         default:
1194                 dbg ("unsupported root hub command");
1195                 stat = USB_ST_STALLED;
1196         }
1197
1198 #ifdef  DEBUG
1199         ohci_dump_roothub (&gohci, 1);
1200 #endif
1201
1202         len = min_t(int, len, leni);
1203         if (data != data_buf)
1204             memcpy (data, data_buf, len);
1205         dev->act_len = len;
1206         dev->status = stat;
1207
1208 #ifdef DEBUG
1209         if (transfer_len)
1210                 urb_priv.actual_length = transfer_len;
1211         pkt_print(dev, pipe, buffer, transfer_len, cmd, "RET(rh)", 0/*usb_pipein(pipe)*/);
1212 #endif
1213
1214         return stat;
1215 }
1216
1217 /*-------------------------------------------------------------------------*/
1218
1219 /* common code for handling submit messages - used for all but root hub */
1220 /* accesses. */
1221 int submit_common_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1222                 int transfer_len, struct devrequest *setup, int interval)
1223 {
1224         int stat = 0;
1225         int maxsize = usb_maxpacket(dev, pipe);
1226         int timeout;
1227
1228         /* device pulled? Shortcut the action. */
1229         if (devgone == dev) {
1230                 dev->status = USB_ST_CRC_ERR;
1231                 return 0;
1232         }
1233
1234 #ifdef DEBUG
1235         urb_priv.actual_length = 0;
1236         pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB", usb_pipein(pipe));
1237 #endif
1238         if (!maxsize) {
1239                 err("submit_common_message: pipesize for pipe %lx is zero",
1240                         pipe);
1241                 return -1;
1242         }
1243
1244         if (sohci_submit_job(dev, pipe, buffer, transfer_len, setup, interval) < 0) {
1245                 err("sohci_submit_job failed");
1246                 return -1;
1247         }
1248
1249         /* allow more time for a BULK device to react - some are slow */
1250 #define BULK_TO  5000   /* timeout in milliseconds */
1251         if (usb_pipebulk(pipe))
1252                 timeout = BULK_TO;
1253         else
1254                 timeout = 100;
1255
1256         /* wait for it to complete */
1257         for (;;) {
1258                 /* check whether the controller is done */
1259                 stat = hc_interrupt();
1260                 if (stat < 0) {
1261                         stat = USB_ST_CRC_ERR;
1262                         break;
1263                 }
1264
1265                 /* NOTE: since we are not interrupt driven in U-Boot and always
1266                  * handle only one URB at a time, we cannot assume the
1267                  * transaction finished on the first successful return from
1268                  * hc_interrupt().. unless the flag for current URB is set,
1269                  * meaning that all TD's to/from device got actually
1270                  * transferred and processed. If the current URB is not
1271                  * finished we need to re-iterate this loop so as
1272                  * hc_interrupt() gets called again as there needs to be some
1273                  * more TD's to process still */
1274                 if ((stat >= 0) && (stat != 0xff) && (urb_finished)) {
1275                         /* 0xff is returned for an SF-interrupt */
1276                         break;
1277                 }
1278
1279                 if (--timeout) {
1280                         wait_ms(1);
1281                         if (!urb_finished)
1282                                 dbg("\%");
1283
1284                 } else {
1285                         err("CTL:TIMEOUT ");
1286                         dbg("submit_common_msg: TO status %x\n", stat);
1287                         stat = USB_ST_CRC_ERR;
1288                         urb_finished = 1;
1289                         break;
1290                 }
1291         }
1292 #if 0
1293         /* we got an Root Hub Status Change interrupt */
1294         if (got_rhsc) {
1295 #ifdef DEBUG
1296                 ohci_dump_roothub (&gohci, 1);
1297 #endif
1298                 got_rhsc = 0;
1299                 /* abuse timeout */
1300                 timeout = rh_check_port_status(&gohci);
1301                 if (timeout >= 0) {
1302 #if 0 /* this does nothing useful, but leave it here in case that changes */
1303                         /* the called routine adds 1 to the passed value */
1304                         usb_hub_port_connect_change(gohci.rh.dev, timeout - 1);
1305 #endif
1306                         /*
1307                          * XXX
1308                          * This is potentially dangerous because it assumes
1309                          * that only one device is ever plugged in!
1310                          */
1311                         devgone = dev;
1312                 }
1313         }
1314 #endif
1315
1316         dev->status = stat;
1317         dev->act_len = transfer_len;
1318
1319 #ifdef DEBUG
1320         pkt_print(dev, pipe, buffer, transfer_len, setup, "RET(ctlr)", usb_pipein(pipe));
1321 #endif
1322
1323         /* free TDs in urb_priv */
1324         urb_free_priv (&urb_priv);
1325         return 0;
1326 }
1327
1328 /* submit routines called from usb.c */
1329 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1330                 int transfer_len)
1331 {
1332         info("submit_bulk_msg");
1333         return submit_common_msg(dev, pipe, buffer, transfer_len, NULL, 0);
1334 }
1335
1336 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1337                 int transfer_len, struct devrequest *setup)
1338 {
1339         int maxsize = usb_maxpacket(dev, pipe);
1340
1341         info("submit_control_msg");
1342 #ifdef DEBUG
1343         urb_priv.actual_length = 0;
1344         pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB", usb_pipein(pipe));
1345 #endif
1346         if (!maxsize) {
1347                 err("submit_control_message: pipesize for pipe %lx is zero",
1348                         pipe);
1349                 return -1;
1350         }
1351         if (((pipe >> 8) & 0x7f) == gohci.rh.devnum) {
1352                 gohci.rh.dev = dev;
1353                 /* root hub - redirect */
1354                 return ohci_submit_rh_msg(dev, pipe, buffer, transfer_len,
1355                         setup);
1356         }
1357
1358         return submit_common_msg(dev, pipe, buffer, transfer_len, setup, 0);
1359 }
1360
1361 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1362                 int transfer_len, int interval)
1363 {
1364         info("submit_int_msg");
1365         return -1;
1366 }
1367
1368 /*-------------------------------------------------------------------------*
1369  * HC functions
1370  *-------------------------------------------------------------------------*/
1371
1372 /* reset the HC and BUS */
1373
1374 static int hc_reset (ohci_t *ohci)
1375 {
1376         int timeout = 30;
1377         int smm_timeout = 50; /* 0,5 sec */
1378
1379         if (readl (&ohci->regs->control) & OHCI_CTRL_IR) { /* SMM owns the HC */
1380                 writel (OHCI_OCR, &ohci->regs->cmdstatus); /* request ownership */
1381                 info("USB HC TakeOver from SMM");
1382                 while (readl (&ohci->regs->control) & OHCI_CTRL_IR) {
1383                         wait_ms (10);
1384                         if (--smm_timeout == 0) {
1385                                 err("USB HC TakeOver failed!");
1386                                 return -1;
1387                         }
1388                 }
1389         }
1390
1391         /* Disable HC interrupts */
1392         writel (OHCI_INTR_MIE, &ohci->regs->intrdisable);
1393
1394         dbg("USB HC reset_hc usb-%s: ctrl = 0x%X ;",
1395                 ohci->slot_name,
1396                 readl (&ohci->regs->control));
1397
1398         /* Reset USB (needed by some controllers) */
1399         ohci->hc_control = 0;
1400         writel (ohci->hc_control, &ohci->regs->control);
1401
1402         /* HC Reset requires max 10 us delay */
1403         writel (OHCI_HCR,  &ohci->regs->cmdstatus);
1404         while ((readl (&ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
1405                 if (--timeout == 0) {
1406                         err("USB HC reset timed out!");
1407                         return -1;
1408                 }
1409                 udelay (1);
1410         }
1411         return 0;
1412 }
1413
1414 /*-------------------------------------------------------------------------*/
1415
1416 /* Start an OHCI controller, set the BUS operational
1417  * enable interrupts
1418  * connect the virtual root hub */
1419
1420 static int hc_start (ohci_t * ohci)
1421 {
1422         __u32 mask;
1423         unsigned int fminterval;
1424
1425         ohci->disabled = 1;
1426
1427         /* Tell the controller where the control and bulk lists are
1428          * The lists are empty now. */
1429
1430         writel (0, &ohci->regs->ed_controlhead);
1431         writel (0, &ohci->regs->ed_bulkhead);
1432
1433         writel ((__u32)ohci->hcca, &ohci->regs->hcca); /* a reset clears this */
1434
1435         fminterval = 0x2edf;
1436         writel ((fminterval * 9) / 10, &ohci->regs->periodicstart);
1437         fminterval |= ((((fminterval - 210) * 6) / 7) << 16);
1438         writel (fminterval, &ohci->regs->fminterval);
1439         writel (0x628, &ohci->regs->lsthresh);
1440
1441         /* start controller operations */
1442         ohci->hc_control = OHCI_CONTROL_INIT | OHCI_USB_OPER;
1443         ohci->disabled = 0;
1444         writel (ohci->hc_control, &ohci->regs->control);
1445
1446         /* disable all interrupts */
1447         mask = (OHCI_INTR_SO | OHCI_INTR_WDH | OHCI_INTR_SF | OHCI_INTR_RD |
1448                         OHCI_INTR_UE | OHCI_INTR_FNO | OHCI_INTR_RHSC |
1449                         OHCI_INTR_OC | OHCI_INTR_MIE);
1450         writel (mask, &ohci->regs->intrdisable);
1451         /* clear all interrupts */
1452         mask &= ~OHCI_INTR_MIE;
1453         writel (mask, &ohci->regs->intrstatus);
1454         /* Choose the interrupts we care about now  - but w/o MIE */
1455         mask = OHCI_INTR_RHSC | OHCI_INTR_UE | OHCI_INTR_WDH | OHCI_INTR_SO;
1456         writel (mask, &ohci->regs->intrenable);
1457
1458 #ifdef  OHCI_USE_NPS
1459         /* required for AMD-756 and some Mac platforms */
1460         writel ((roothub_a (ohci) | RH_A_NPS) & ~RH_A_PSM,
1461                 &ohci->regs->roothub.a);
1462         writel (RH_HS_LPSC, &ohci->regs->roothub.status);
1463 #endif  /* OHCI_USE_NPS */
1464
1465 #define mdelay(n) ({unsigned long msec=(n); while (msec--) udelay(1000);})
1466         /* POTPGT delay is bits 24-31, in 2 ms units. */
1467         mdelay ((roothub_a (ohci) >> 23) & 0x1fe);
1468
1469         /* connect the virtual root hub */
1470         ohci->rh.devnum = 0;
1471
1472         return 0;
1473 }
1474
1475 /*-------------------------------------------------------------------------*/
1476
1477 /* an interrupt happens */
1478
1479 static int
1480 hc_interrupt (void)
1481 {
1482         ohci_t *ohci = &gohci;
1483         struct ohci_regs *regs = ohci->regs;
1484         int ints;
1485         int stat = -1;
1486
1487         if ((ohci->hcca->done_head != 0) &&
1488              !(ohci_cpu_to_le32(ohci->hcca->done_head) & 0x01)) {
1489
1490                 ints =  OHCI_INTR_WDH;
1491
1492         } else if ((ints = readl (&regs->intrstatus)) == ~(u32)0) {
1493                 ohci->disabled++;
1494                 err ("%s device removed!", ohci->slot_name);
1495                 return -1;
1496
1497         } else if ((ints &= readl (&regs->intrenable)) == 0) {
1498                 dbg("hc_interrupt: returning..\n");
1499                 return 0xff;
1500         }
1501
1502         /* dbg("Interrupt: %x frame: %x", ints, le16_to_cpu (ohci->hcca->frame_no)); */
1503
1504         if (ints & OHCI_INTR_RHSC) {
1505                 got_rhsc = 1;
1506                 stat = 0xff;
1507         }
1508
1509         if (ints & OHCI_INTR_UE) {
1510                 ohci->disabled++;
1511                 err ("OHCI Unrecoverable Error, controller usb-%s disabled",
1512                         ohci->slot_name);
1513                 /* e.g. due to PCI Master/Target Abort */
1514
1515 #ifdef  DEBUG
1516                 ohci_dump (ohci, 1);
1517 #endif
1518                 /* FIXME: be optimistic, hope that bug won't repeat often. */
1519                 /* Make some non-interrupt context restart the controller. */
1520                 /* Count and limit the retries though; either hardware or */
1521                 /* software errors can go forever... */
1522                 hc_reset (ohci);
1523                 return -1;
1524         }
1525
1526         if (ints & OHCI_INTR_WDH) {
1527                 writel (OHCI_INTR_WDH, &regs->intrdisable);
1528                 stat = dl_done_list (&gohci, dl_reverse_done_list (&gohci));
1529                 writel (OHCI_INTR_WDH, &regs->intrenable);
1530         }
1531
1532         if (ints & OHCI_INTR_SO) {
1533                 dbg("USB Schedule overrun\n");
1534                 writel (OHCI_INTR_SO, &regs->intrenable);
1535                 stat = -1;
1536         }
1537
1538         /* FIXME:  this assumes SOF (1/ms) interrupts don't get lost... */
1539         if (ints & OHCI_INTR_SF) {
1540                 unsigned int frame = ohci_cpu_to_le16 (ohci->hcca->frame_no) & 1;
1541                 wait_ms(1);
1542                 writel (OHCI_INTR_SF, &regs->intrdisable);
1543                 if (ohci->ed_rm_list[frame] != NULL)
1544                         writel (OHCI_INTR_SF, &regs->intrenable);
1545                 stat = 0xff;
1546         }
1547
1548         writel (ints, &regs->intrstatus);
1549         return stat;
1550 }
1551
1552 /*-------------------------------------------------------------------------*/
1553
1554 /*-------------------------------------------------------------------------*/
1555
1556 /* De-allocate all resources.. */
1557
1558 static void hc_release_ohci (ohci_t *ohci)
1559 {
1560         dbg ("USB HC release ohci usb-%s", ohci->slot_name);
1561
1562         if (!ohci->disabled)
1563                 hc_reset (ohci);
1564 }
1565
1566 /*-------------------------------------------------------------------------*/
1567
1568 /*
1569  * low level initalisation routine, called from usb.c
1570  */
1571 static char ohci_inited = 0;
1572
1573 int usb_lowlevel_init(void)
1574 {
1575         memset (&gohci, 0, sizeof (ohci_t));
1576         memset (&urb_priv, 0, sizeof (urb_priv_t));
1577
1578         /* align the storage */
1579         if ((__u32)&ghcca[0] & 0xff) {
1580                 err("HCCA not aligned!!");
1581                 return -1;
1582         }
1583         phcca = &ghcca[0];
1584         info("aligned ghcca %p", phcca);
1585         memset(&ohci_dev, 0, sizeof(struct ohci_device));
1586         if ((__u32)&ohci_dev.ed[0] & 0x7) {
1587                 err("EDs not aligned!!");
1588                 return -1;
1589         }
1590         memset(gtd, 0, sizeof(td_t) * (NUM_TD + 1));
1591         if ((__u32)gtd & 0x7) {
1592                 err("TDs not aligned!!");
1593                 return -1;
1594         }
1595         ptd = gtd;
1596         gohci.hcca = phcca;
1597         memset (phcca, 0, sizeof (struct ohci_hcca));
1598
1599         gohci.disabled = 1;
1600         gohci.sleeping = 0;
1601         gohci.irq = -1;
1602 #if defined(CONFIG_440EP)
1603         gohci.regs = (struct ohci_regs *)(CONFIG_SYS_PERIPHERAL_BASE | 0x1000);
1604 #elif defined(CONFIG_440EPX) || defined(CONFIG_SYS_USB_HOST)
1605         gohci.regs = (struct ohci_regs *)(CONFIG_SYS_USB_HOST);
1606 #endif
1607
1608         gohci.flags = 0;
1609         gohci.slot_name = "ppc440";
1610
1611         if (hc_reset (&gohci) < 0) {
1612                 hc_release_ohci (&gohci);
1613                 return -1;
1614         }
1615
1616         if (hc_start (&gohci) < 0) {
1617                 err ("can't start usb-%s", gohci.slot_name);
1618                 hc_release_ohci (&gohci);
1619                 return -1;
1620         }
1621
1622 #ifdef  DEBUG
1623         ohci_dump (&gohci, 1);
1624 #endif
1625         ohci_inited = 1;
1626         urb_finished = 1;
1627
1628 #if defined(CONFIG_440EP) || defined(CONFIG_440EPX)
1629         /* init the device driver */
1630         usb_dev_init();
1631 #endif
1632
1633         return 0;
1634 }
1635
1636 int usb_lowlevel_stop(void)
1637 {
1638         /* this gets called really early - before the controller has */
1639         /* even been initialized! */
1640         if (!ohci_inited)
1641                 return 0;
1642         /* TODO release any interrupts, etc. */
1643         /* call hc_release_ohci() here ? */
1644         hc_reset (&gohci);
1645         return 0;
1646 }
1647
1648 #endif /* CONFIG_USB_OHCI */