arch/powerpc/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 <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  * SPDX-License-Identifier:     GPL-2.0+
  15  */
  16 /*
  17  * IMPORTANT NOTES
  18  * 1 - this driver is intended for use with USB Mass Storage Devices
  19  *     (BBB) ONLY. There is NO support for Interrupt or Isochronous pipes!
  20  */
  21
  22 #include <common.h>
  23
  24 #ifdef CONFIG_USB_OHCI
  25
  26 #include <malloc.h>
  27 #include <usb.h>
  28 #include "usb_ohci.h"
  29
  30 #include <mpc5xxx.h>
  31
  32 #define OHCI_USE_NPS            /* force NoPowerSwitching mode */
  33 #undef OHCI_VERBOSE_DEBUG       /* not always helpful */
  34 #undef DEBUG
  35 #undef SHOW_INFO
  36 #undef OHCI_FILL_TRACE
  37
  38 /* For initializing controller (mask in an HCFS mode too) */
  39 #define OHCI_CONTROL_INIT \
  40         (OHCI_CTRL_CBSR & 0x3) | OHCI_CTRL_IE | OHCI_CTRL_PLE
  41
  42 #define readl(a) (*((volatile u32 *)(a)))
  43 #define writel(a, b) (*((volatile u32 *)(b)) = ((volatile u32)a))
  44
  45 #ifdef DEBUG
  46 #define dbg(format, arg...) printf("DEBUG: " format "\n", ## arg)
  47 #else
  48 #define dbg(format, arg...) do {} while(0)
  49 #endif /* DEBUG */
  50 #define err(format, arg...) printf("ERROR: " format "\n", ## arg)
  51 #ifdef SHOW_INFO
  52 #define info(format, arg...) printf("INFO: " format "\n", ## arg)
  53 #else
  54 #define info(format, arg...) do {} while(0)
  55 #endif
  56
  57 #define m16_swap(x) swap_16(x)
  58 #define m32_swap(x) swap_32(x)
  59
  60 #define ohci_cpu_to_le16(x) (x)
  61 #define ohci_cpu_to_le32(x) (x)
  62
  63 /* global ohci_t */
  64 static ohci_t gohci;
  65 /* this must be aligned to a 256 byte boundary */
  66 struct ohci_hcca ghcca[1];
  67 /* a pointer to the aligned storage */
  68 struct ohci_hcca *phcca;
  69 /* this allocates EDs for all possible endpoints */
  70 struct ohci_device ohci_dev;
  71 /* urb_priv */
  72 urb_priv_t urb_priv;
  73 /* RHSC flag */
  74 int got_rhsc;
  75 /* device which was disconnected */
  76 struct usb_device *devgone;
  77 /* flag guarding URB transation */
  78 int urb_finished = 0;
  79
  80 /*-------------------------------------------------------------------------*/
  81
  82 /* AMD-756 (D2 rev) reports corrupt register contents in some cases.
  83  * The erratum (#4) description is incorrect.  AMD's workaround waits
  84  * till some bits (mostly reserved) are clear; ok for all revs.
  85  */
  86 #define OHCI_QUIRK_AMD756 0xabcd
  87 #define read_roothub(hc, register, mask) ({ \
  88         u32 temp = readl (&hc->regs->roothub.register); \
  89         if (hc->flags & OHCI_QUIRK_AMD756) \
  90                 while (temp & mask) \
  91                         temp = readl (&hc->regs->roothub.register); \
  92         temp; })
  93
  94 static u32 roothub_a (struct ohci *hc)
  95         { return read_roothub (hc, a, 0xfc0fe000); }
  96 static inline u32 roothub_b (struct ohci *hc)
  97         { return readl (&hc->regs->roothub.b); }
  98 static inline u32 roothub_status (struct ohci *hc)
  99         { return readl (&hc->regs->roothub.status); }
 100 static u32 roothub_portstatus (struct ohci *hc, int i)
 101         { return read_roothub (hc, portstatus [i], 0xffe0fce0); }
 102
 103
 104 /* forward declaration */
 105 static int hc_interrupt (void);
 106 static void
 107 td_submit_job (struct usb_device * dev, unsigned long pipe, void * buffer,
 108         int transfer_len, struct devrequest * setup, urb_priv_t * urb, int interval);
 109
 110 /*-------------------------------------------------------------------------*
 111  * URB support functions
 112  *-------------------------------------------------------------------------*/
 113
 114 /* free HCD-private data associated with this URB */
 115
 116 static void urb_free_priv (urb_priv_t * urb)
 117 {
 118         int             i;
 119         int             last;
 120         struct td       * td;
 121
 122         last = urb->length - 1;
 123         if (last >= 0) {
 124                 for (i = 0; i <= last; i++) {
 125                         td = urb->td[i];
 126                         if (td) {
 127                                 td->usb_dev = NULL;
 128                                 urb->td[i] = NULL;
 129                         }
 130                 }
 131         }
 132 }
 133
 134 /*-------------------------------------------------------------------------*/
 135
 136 #ifdef DEBUG
 137 static int sohci_get_current_frame_number (struct usb_device * dev);
 138
 139 /* debug| print the main components of an URB
 140  * small: 0) header + data packets 1) just header */
 141
 142 static void pkt_print (struct usb_device * dev, unsigned long pipe, void * buffer,
 143         int transfer_len, struct devrequest * setup, char * str, int small)
 144 {
 145         urb_priv_t * purb = &urb_priv;
 146
 147         dbg("%s URB:[%4x] dev:%2d,ep:%2d-%c,type:%s,len:%d/%d stat:%#lx",
 148                         str,
 149                         sohci_get_current_frame_number (dev),
 150                         usb_pipedevice (pipe),
 151                         usb_pipeendpoint (pipe),
 152                         usb_pipeout (pipe)? 'O': 'I',
 153                         usb_pipetype (pipe) < 2? (usb_pipeint (pipe)? "INTR": "ISOC"):
 154                                 (usb_pipecontrol (pipe)? "CTRL": "BULK"),
 155                         purb->actual_length,
 156                         transfer_len, dev->status);
 157 #ifdef  OHCI_VERBOSE_DEBUG
 158         if (!small) {
 159                 int i, len;
 160
 161                 if (usb_pipecontrol (pipe)) {
 162                         printf (__FILE__ ": cmd(8):");
 163                         for (i = 0; i < 8 ; i++)
 164                                 printf (" %02x", ((__u8 *) setup) [i]);
 165                         printf ("\n");
 166                 }
 167                 if (transfer_len > 0 && buffer) {
 168                         printf (__FILE__ ": data(%d/%d):",
 169                                 purb->actual_length,
 170                                 transfer_len);
 171                         len = usb_pipeout (pipe)?
 172                                         transfer_len: purb->actual_length;
 173                         for (i = 0; i < 16 && i < len; i++)
 174                                 printf (" %02x", ((__u8 *) buffer) [i]);
 175                         printf ("%s\n", i < len? "...": "");
 176                 }
 177         }
 178 #endif
 179 }
 180
 181 /* just for debugging; prints non-empty branches of the int ed tree inclusive iso eds*/
 182 void ep_print_int_eds (ohci_t *ohci, char * str) {
 183         int i, j;
 184          __u32 * ed_p;
 185         for (i= 0; i < 32; i++) {
 186                 j = 5;
 187                 ed_p = &(ohci->hcca->int_table [i]);
 188                 if (*ed_p == 0)
 189                     continue;
 190                 printf (__FILE__ ": %s branch int %2d(%2x):", str, i, i);
 191                 while (*ed_p != 0 && j--) {
 192                         ed_t *ed = (ed_t *)ohci_cpu_to_le32(ed_p);
 193                         printf (" ed: %4x;", ed->hwINFO);
 194                         ed_p = &ed->hwNextED;
 195                 }
 196                 printf ("\n");
 197         }
 198 }
 199
 200 static void ohci_dump_intr_mask (char *label, __u32 mask)
 201 {
 202         dbg ("%s: 0x%08x%s%s%s%s%s%s%s%s%s",
 203                 label,
 204                 mask,
 205                 (mask & OHCI_INTR_MIE) ? " MIE" : "",
 206                 (mask & OHCI_INTR_OC) ? " OC" : "",
 207                 (mask & OHCI_INTR_RHSC) ? " RHSC" : "",
 208                 (mask & OHCI_INTR_FNO) ? " FNO" : "",
 209                 (mask & OHCI_INTR_UE) ? " UE" : "",
 210                 (mask & OHCI_INTR_RD) ? " RD" : "",
 211                 (mask & OHCI_INTR_SF) ? " SF" : "",
 212                 (mask & OHCI_INTR_WDH) ? " WDH" : "",
 213                 (mask & OHCI_INTR_SO) ? " SO" : ""
 214                 );
 215 }
 216
 217 static void maybe_print_eds (char *label, __u32 value)
 218 {
 219         ed_t *edp = (ed_t *)value;
 220
 221         if (value) {
 222                 dbg ("%s %08x", label, value);
 223                 dbg ("%08x", edp->hwINFO);
 224                 dbg ("%08x", edp->hwTailP);
 225                 dbg ("%08x", edp->hwHeadP);
 226                 dbg ("%08x", edp->hwNextED);
 227         }
 228 }
 229
 230 static char * hcfs2string (int state)
 231 {
 232         switch (state) {
 233                 case OHCI_USB_RESET:    return "reset";
 234                 case OHCI_USB_RESUME:   return "resume";
 235                 case OHCI_USB_OPER:     return "operational";
 236                 case OHCI_USB_SUSPEND:  return "suspend";
 237         }
 238         return "?";
 239 }
 240
 241 /* dump control and status registers */
 242 static void ohci_dump_status (ohci_t *controller)
 243 {
 244         struct ohci_regs        *regs = controller->regs;
 245         __u32                   temp;
 246
 247         temp = readl (&regs->revision) & 0xff;
 248         if (temp != 0x10)
 249                 dbg ("spec %d.%d", (temp >> 4), (temp & 0x0f));
 250
 251         temp = readl (&regs->control);
 252         dbg ("control: 0x%08x%s%s%s HCFS=%s%s%s%s%s CBSR=%d", temp,
 253                 (temp & OHCI_CTRL_RWE) ? " RWE" : "",
 254                 (temp & OHCI_CTRL_RWC) ? " RWC" : "",
 255                 (temp & OHCI_CTRL_IR) ? " IR" : "",
 256                 hcfs2string (temp & OHCI_CTRL_HCFS),
 257                 (temp & OHCI_CTRL_BLE) ? " BLE" : "",
 258                 (temp & OHCI_CTRL_CLE) ? " CLE" : "",
 259                 (temp & OHCI_CTRL_IE) ? " IE" : "",
 260                 (temp & OHCI_CTRL_PLE) ? " PLE" : "",
 261                 temp & OHCI_CTRL_CBSR
 262                 );
 263
 264         temp = readl (&regs->cmdstatus);
 265         dbg ("cmdstatus: 0x%08x SOC=%d%s%s%s%s", temp,
 266                 (temp & OHCI_SOC) >> 16,
 267                 (temp & OHCI_OCR) ? " OCR" : "",
 268                 (temp & OHCI_BLF) ? " BLF" : "",
 269                 (temp & OHCI_CLF) ? " CLF" : "",
 270                 (temp & OHCI_HCR) ? " HCR" : ""
 271                 );
 272
 273         ohci_dump_intr_mask ("intrstatus", readl (&regs->intrstatus));
 274         ohci_dump_intr_mask ("intrenable", readl (&regs->intrenable));
 275
 276         maybe_print_eds ("ed_periodcurrent", readl (&regs->ed_periodcurrent));
 277
 278         maybe_print_eds ("ed_controlhead", readl (&regs->ed_controlhead));
 279         maybe_print_eds ("ed_controlcurrent", readl (&regs->ed_controlcurrent));
 280
 281         maybe_print_eds ("ed_bulkhead", readl (&regs->ed_bulkhead));
 282         maybe_print_eds ("ed_bulkcurrent", readl (&regs->ed_bulkcurrent));
 283
 284         maybe_print_eds ("donehead", readl (&regs->donehead));
 285 }
 286
 287 static void ohci_dump_roothub (ohci_t *controller, int verbose)
 288 {
 289         __u32                   temp, ndp, i;
 290
 291         temp = roothub_a (controller);
 292         ndp = (temp & RH_A_NDP);
 293
 294         if (verbose) {
 295                 dbg ("roothub.a: %08x POTPGT=%d%s%s%s%s%s NDP=%d", temp,
 296                         ((temp & RH_A_POTPGT) >> 24) & 0xff,
 297                         (temp & RH_A_NOCP) ? " NOCP" : "",
 298                         (temp & RH_A_OCPM) ? " OCPM" : "",
 299                         (temp & RH_A_DT) ? " DT" : "",
 300                         (temp & RH_A_NPS) ? " NPS" : "",
 301                         (temp & RH_A_PSM) ? " PSM" : "",
 302                         ndp
 303                         );
 304                 temp = roothub_b (controller);
 305                 dbg ("roothub.b: %08x PPCM=%04x DR=%04x",
 306                         temp,
 307                         (temp & RH_B_PPCM) >> 16,
 308                         (temp & RH_B_DR)
 309                         );
 310                 temp = roothub_status (controller);
 311                 dbg ("roothub.status: %08x%s%s%s%s%s%s",
 312                         temp,
 313                         (temp & RH_HS_CRWE) ? " CRWE" : "",
 314                         (temp & RH_HS_OCIC) ? " OCIC" : "",
 315                         (temp & RH_HS_LPSC) ? " LPSC" : "",
 316                         (temp & RH_HS_DRWE) ? " DRWE" : "",
 317                         (temp & RH_HS_OCI) ? " OCI" : "",
 318                         (temp & RH_HS_LPS) ? " LPS" : ""
 319                         );
 320         }
 321
 322         for (i = 0; i < ndp; i++) {
 323                 temp = roothub_portstatus (controller, i);
 324                 dbg ("roothub.portstatus [%d] = 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s",
 325                         i,
 326                         temp,
 327                         (temp & RH_PS_PRSC) ? " PRSC" : "",
 328                         (temp & RH_PS_OCIC) ? " OCIC" : "",
 329                         (temp & RH_PS_PSSC) ? " PSSC" : "",
 330                         (temp & RH_PS_PESC) ? " PESC" : "",
 331                         (temp & RH_PS_CSC) ? " CSC" : "",
 332
 333                         (temp & RH_PS_LSDA) ? " LSDA" : "",
 334                         (temp & RH_PS_PPS) ? " PPS" : "",
 335                         (temp & RH_PS_PRS) ? " PRS" : "",
 336                         (temp & RH_PS_POCI) ? " POCI" : "",
 337                         (temp & RH_PS_PSS) ? " PSS" : "",
 338
 339                         (temp & RH_PS_PES) ? " PES" : "",
 340                         (temp & RH_PS_CCS) ? " CCS" : ""
 341                         );
 342         }
 343 }
 344
 345 static void ohci_dump (ohci_t *controller, int verbose)
 346 {
 347         dbg ("OHCI controller usb-%s state", controller->slot_name);
 348
 349         /* dumps some of the state we know about */
 350         ohci_dump_status (controller);
 351         if (verbose)
 352                 ep_print_int_eds (controller, "hcca");
 353         dbg ("hcca frame #%04x", controller->hcca->frame_no);
 354         ohci_dump_roothub (controller, 1);
 355 }
 356
 357
 358 #endif /* DEBUG */
 359
 360 /*-------------------------------------------------------------------------*
 361  * Interface functions (URB)
 362  *-------------------------------------------------------------------------*/
 363
 364 /* get a transfer request */
 365
 366 int sohci_submit_job(struct usb_device *dev, unsigned long pipe, void *buffer,
 367                 int transfer_len, struct devrequest *setup, int interval)
 368 {
 369         ohci_t *ohci;
 370         ed_t * ed;
 371         urb_priv_t *purb_priv;
 372         int i, size = 0;
 373
 374         ohci = &gohci;
 375
 376         /* when controller's hung, permit only roothub cleanup attempts
 377          * such as powering down ports */
 378         if (ohci->disabled) {
 379                 err("sohci_submit_job: EPIPE");
 380                 return -1;
 381         }
 382
 383         /* if we have an unfinished URB from previous transaction let's
 384          * fail and scream as quickly as possible so as not to corrupt
 385          * further communication */
 386         if (!urb_finished) {
 387                 err("sohci_submit_job: URB NOT FINISHED");
 388                 return -1;
 389         }
 390         /* we're about to begin a new transaction here so mark the URB unfinished */
 391         urb_finished = 0;
 392
 393         /* every endpoint has a ed, locate and fill it */
 394         if (!(ed = ep_add_ed (dev, pipe))) {
 395                 err("sohci_submit_job: ENOMEM");
 396                 return -1;
 397         }
 398
 399         /* for the private part of the URB we need the number of TDs (size) */
 400         switch (usb_pipetype (pipe)) {
 401                 case PIPE_BULK: /* one TD for every 4096 Byte */
 402                         size = (transfer_len - 1) / 4096 + 1;
 403                         break;
 404                 case PIPE_CONTROL: /* 1 TD for setup, 1 for ACK and 1 for every 4096 B */
 405                         size = (transfer_len == 0)? 2:
 406                                                 (transfer_len - 1) / 4096 + 3;
 407                         break;
 408         }
 409
 410         if (size >= (N_URB_TD - 1)) {
 411                 err("need %d TDs, only have %d", size, N_URB_TD);
 412                 return -1;
 413         }
 414         purb_priv = &urb_priv;
 415         purb_priv->pipe = pipe;
 416
 417         /* fill the private part of the URB */
 418         purb_priv->length = size;
 419         purb_priv->ed = ed;
 420         purb_priv->actual_length = 0;
 421
 422         /* allocate the TDs */
 423         /* note that td[0] was allocated in ep_add_ed */
 424         for (i = 0; i < size; i++) {
 425                 purb_priv->td[i] = td_alloc (dev);
 426                 if (!purb_priv->td[i]) {
 427                         purb_priv->length = i;
 428                         urb_free_priv (purb_priv);
 429                         err("sohci_submit_job: ENOMEM");
 430                         return -1;
 431                 }
 432         }
 433
 434         if (ed->state == ED_NEW || (ed->state & ED_DEL)) {
 435                 urb_free_priv (purb_priv);
 436                 err("sohci_submit_job: EINVAL");
 437                 return -1;
 438         }
 439
 440         /* link the ed into a chain if is not already */
 441         if (ed->state != ED_OPER)
 442                 ep_link (ohci, ed);
 443
 444         /* fill the TDs and link it to the ed */
 445         td_submit_job(dev, pipe, buffer, transfer_len, setup, purb_priv, interval);
 446
 447         return 0;
 448 }
 449
 450 /*-------------------------------------------------------------------------*/
 451
 452 #ifdef DEBUG
 453 /* tell us the current USB frame number */
 454
 455 static int sohci_get_current_frame_number (struct usb_device *usb_dev)
 456 {
 457         ohci_t *ohci = &gohci;
 458
 459         return ohci_cpu_to_le16 (ohci->hcca->frame_no);
 460 }
 461 #endif
 462
 463 /*-------------------------------------------------------------------------*
 464  * ED handling functions
 465  *-------------------------------------------------------------------------*/
 466
 467 /* link an ed into one of the HC chains */
 468
 469 static int ep_link (ohci_t *ohci, ed_t *edi)
 470 {
 471         volatile ed_t *ed = edi;
 472
 473         ed->state = ED_OPER;
 474
 475         switch (ed->type) {
 476         case PIPE_CONTROL:
 477                 ed->hwNextED = 0;
 478                 if (ohci->ed_controltail == NULL) {
 479                         writel (ed, &ohci->regs->ed_controlhead);
 480                 } else {
 481                         ohci->ed_controltail->hwNextED = ohci_cpu_to_le32 ((unsigned long)ed);
 482                 }
 483                 ed->ed_prev = ohci->ed_controltail;
 484                 if (!ohci->ed_controltail && !ohci->ed_rm_list[0] &&
 485                         !ohci->ed_rm_list[1] && !ohci->sleeping) {
 486                         ohci->hc_control |= OHCI_CTRL_CLE;
 487                         writel (ohci->hc_control, &ohci->regs->control);
 488                 }
 489                 ohci->ed_controltail = edi;
 490                 break;
 491
 492         case PIPE_BULK:
 493                 ed->hwNextED = 0;
 494                 if (ohci->ed_bulktail == NULL) {
 495                         writel (ed, &ohci->regs->ed_bulkhead);
 496                 } else {
 497                         ohci->ed_bulktail->hwNextED = ohci_cpu_to_le32 ((unsigned long)ed);
 498                 }
 499                 ed->ed_prev = ohci->ed_bulktail;
 500                 if (!ohci->ed_bulktail && !ohci->ed_rm_list[0] &&
 501                         !ohci->ed_rm_list[1] && !ohci->sleeping) {
 502                         ohci->hc_control |= OHCI_CTRL_BLE;
 503                         writel (ohci->hc_control, &ohci->regs->control);
 504                 }
 505                 ohci->ed_bulktail = edi;
 506                 break;
 507         }
 508         return 0;
 509 }
 510
 511 /*-------------------------------------------------------------------------*/
 512
 513 /* unlink an ed from one of the HC chains.
 514  * just the link to the ed is unlinked.
 515  * the link from the ed still points to another operational ed or 0
 516  * so the HC can eventually finish the processing of the unlinked ed */
 517
 518 static int ep_unlink (ohci_t *ohci, ed_t *edi)
 519 {
 520         volatile ed_t *ed = edi;
 521
 522         ed->hwINFO |= ohci_cpu_to_le32 (OHCI_ED_SKIP);
 523
 524         switch (ed->type) {
 525         case PIPE_CONTROL:
 526                 if (ed->ed_prev == NULL) {
 527                         if (!ed->hwNextED) {
 528                                 ohci->hc_control &= ~OHCI_CTRL_CLE;
 529                                 writel (ohci->hc_control, &ohci->regs->control);
 530                         }
 531                         writel (ohci_cpu_to_le32 (*((__u32 *)&ed->hwNextED)), &ohci->regs->ed_controlhead);
 532                 } else {
 533                         ed->ed_prev->hwNextED = ed->hwNextED;
 534                 }
 535                 if (ohci->ed_controltail == ed) {
 536                         ohci->ed_controltail = ed->ed_prev;
 537                 } else {
 538                         ((ed_t *)ohci_cpu_to_le32 (*((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
 539                 }
 540                 break;
 541
 542         case PIPE_BULK:
 543                 if (ed->ed_prev == NULL) {
 544                         if (!ed->hwNextED) {
 545                                 ohci->hc_control &= ~OHCI_CTRL_BLE;
 546                                 writel (ohci->hc_control, &ohci->regs->control);
 547                         }
 548                         writel (ohci_cpu_to_le32 (*((__u32 *)&ed->hwNextED)), &ohci->regs->ed_bulkhead);
 549                 } else {
 550                         ed->ed_prev->hwNextED = ed->hwNextED;
 551                 }
 552                 if (ohci->ed_bulktail == ed) {
 553                         ohci->ed_bulktail = ed->ed_prev;
 554                 } else {
 555                         ((ed_t *)ohci_cpu_to_le32 (*((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
 556                 }
 557                 break;
 558         }
 559         ed->state = ED_UNLINK;
 560         return 0;
 561 }
 562
 563
 564 /*-------------------------------------------------------------------------*/
 565
 566 /* add/reinit an endpoint; this should be done once at the usb_set_configuration command,
 567  * but the USB stack is a little bit stateless  so we do it at every transaction
 568  * if the state of the ed is ED_NEW then a dummy td is added and the state is changed to ED_UNLINK
 569  * in all other cases the state is left unchanged
 570  * the ed info fields are setted anyway even though most of them should not change */
 571
 572 static ed_t * ep_add_ed (struct usb_device *usb_dev, unsigned long pipe)
 573 {
 574         td_t *td;
 575         ed_t *ed_ret;
 576         volatile ed_t *ed;
 577
 578         ed = ed_ret = &ohci_dev.ed[(usb_pipeendpoint (pipe) << 1) |
 579                         (usb_pipecontrol (pipe)? 0: usb_pipeout (pipe))];
 580
 581         if ((ed->state & ED_DEL) || (ed->state & ED_URB_DEL)) {
 582                 err("ep_add_ed: pending delete");
 583                 /* pending delete request */
 584                 return NULL;
 585         }
 586
 587         if (ed->state == ED_NEW) {
 588                 ed->hwINFO = ohci_cpu_to_le32 (OHCI_ED_SKIP); /* skip ed */
 589                 /* dummy td; end of td list for ed */
 590                 td = td_alloc (usb_dev);
 591                 ed->hwTailP = ohci_cpu_to_le32 ((unsigned long)td);
 592                 ed->hwHeadP = ed->hwTailP;
 593                 ed->state = ED_UNLINK;
 594                 ed->type = usb_pipetype (pipe);
 595                 ohci_dev.ed_cnt++;
 596         }
 597
 598         ed->hwINFO = ohci_cpu_to_le32 (usb_pipedevice (pipe)
 599                         | usb_pipeendpoint (pipe) << 7
 600                         | (usb_pipeisoc (pipe)? 0x8000: 0)
 601                         | (usb_pipecontrol (pipe)? 0: (usb_pipeout (pipe)? 0x800: 0x1000))
 602                         | (usb_dev->speed == USB_SPEED_LOW) << 13
 603                         | usb_maxpacket (usb_dev, pipe) << 16);
 604
 605         return ed_ret;
 606 }
 607
 608 /*-------------------------------------------------------------------------*
 609  * TD handling functions
 610  *-------------------------------------------------------------------------*/
 611
 612 /* enqueue next TD for this URB (OHCI spec 5.2.8.2) */
 613
 614 static void td_fill (ohci_t *ohci, unsigned int info,
 615         void *data, int len,
 616         struct usb_device *dev, int index, urb_priv_t *urb_priv)
 617 {
 618         volatile td_t  *td, *td_pt;
 619 #ifdef OHCI_FILL_TRACE
 620         int i;
 621 #endif
 622
 623         if (index > urb_priv->length) {
 624                 err("index > length");
 625                 return;
 626         }
 627         /* use this td as the next dummy */
 628         td_pt = urb_priv->td [index];
 629         td_pt->hwNextTD = 0;
 630
 631         /* fill the old dummy TD */
 632         td = urb_priv->td [index] = (td_t *)(ohci_cpu_to_le32 (urb_priv->ed->hwTailP) & ~0xf);
 633
 634         td->ed = urb_priv->ed;
 635         td->next_dl_td = NULL;
 636         td->index = index;
 637         td->data = (__u32)data;
 638 #ifdef OHCI_FILL_TRACE
 639         if (usb_pipebulk(urb_priv->pipe) && usb_pipeout(urb_priv->pipe)) {
 640                 for (i = 0; i < len; i++)
 641                 printf("td->data[%d] %#2x ",i, ((unsigned char *)td->data)[i]);
 642                 printf("\n");
 643         }
 644 #endif
 645         if (!len)
 646                 data = 0;
 647
 648         td->hwINFO = ohci_cpu_to_le32 (info);
 649         td->hwCBP = ohci_cpu_to_le32 ((unsigned long)data);
 650         if (data)
 651                 td->hwBE = ohci_cpu_to_le32 ((unsigned long)(data + len - 1));
 652         else
 653                 td->hwBE = 0;
 654         td->hwNextTD = ohci_cpu_to_le32 ((unsigned long)td_pt);
 655
 656         /* append to queue */
 657         td->ed->hwTailP = td->hwNextTD;
 658 }
 659
 660 /*-------------------------------------------------------------------------*/
 661
 662 /* prepare all TDs of a transfer */
 663 static void td_submit_job (struct usb_device *dev, unsigned long pipe, void *buffer,
 664         int transfer_len, struct devrequest *setup, urb_priv_t *urb, int interval)
 665 {
 666         ohci_t *ohci = &gohci;
 667         int data_len = transfer_len;
 668         void *data;
 669         int cnt = 0;
 670         __u32 info = 0;
 671         unsigned int toggle = 0;
 672
 673         /* OHCI handles the DATA-toggles itself, we just use the
 674            USB-toggle bits for resetting */
 675         if(usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe))) {
 676                 toggle = TD_T_TOGGLE;
 677         } else {
 678                 toggle = TD_T_DATA0;
 679                 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 1);
 680         }
 681         urb->td_cnt = 0;
 682         if (data_len)
 683                 data = buffer;
 684         else
 685                 data = 0;
 686
 687         switch (usb_pipetype (pipe)) {
 688         case PIPE_BULK:
 689                 info = usb_pipeout (pipe)?
 690                         TD_CC | TD_DP_OUT : TD_CC | TD_DP_IN ;
 691                 while(data_len > 4096) {
 692                         td_fill (ohci, info | (cnt? TD_T_TOGGLE:toggle), data, 4096, dev, cnt, urb);
 693                         data += 4096; data_len -= 4096; cnt++;
 694                 }
 695                 info = usb_pipeout (pipe)?
 696                         TD_CC | TD_DP_OUT : TD_CC | TD_R | TD_DP_IN ;
 697                 td_fill (ohci, info | (cnt? TD_T_TOGGLE:toggle), data, data_len, dev, cnt, urb);
 698                 cnt++;
 699
 700                 if (!ohci->sleeping)
 701                         writel (OHCI_BLF, &ohci->regs->cmdstatus); /* start bulk list */
 702                 break;
 703
 704         case PIPE_CONTROL:
 705                 info = TD_CC | TD_DP_SETUP | TD_T_DATA0;
 706                 td_fill (ohci, info, setup, 8, dev, cnt++, urb);
 707                 if (data_len > 0) {
 708                         info = usb_pipeout (pipe)?
 709                                 TD_CC | TD_R | TD_DP_OUT | TD_T_DATA1 : TD_CC | TD_R | TD_DP_IN | TD_T_DATA1;
 710                         /* NOTE:  mishandles transfers >8K, some >4K */
 711                         td_fill (ohci, info, data, data_len, dev, cnt++, urb);
 712                 }
 713                 info = usb_pipeout (pipe)?
 714                         TD_CC | TD_DP_IN | TD_T_DATA1: TD_CC | TD_DP_OUT | TD_T_DATA1;
 715                 td_fill (ohci, info, data, 0, dev, cnt++, urb);
 716                 if (!ohci->sleeping)
 717                         writel (OHCI_CLF, &ohci->regs->cmdstatus); /* start Control list */
 718                 break;
 719         }
 720         if (urb->length != cnt)
 721                 dbg("TD LENGTH %d != CNT %d", urb->length, cnt);
 722 }
 723
 724 /*-------------------------------------------------------------------------*
 725  * Done List handling functions
 726  *-------------------------------------------------------------------------*/
 727
 728
 729 /* calculate the transfer length and update the urb */
 730
 731 static void dl_transfer_length(td_t * td)
 732 {
 733         __u32 tdBE, tdCBP;
 734         urb_priv_t *lurb_priv = &urb_priv;
 735
 736         tdBE   = ohci_cpu_to_le32 (td->hwBE);
 737         tdCBP  = ohci_cpu_to_le32 (td->hwCBP);
 738
 739
 740         if (!(usb_pipecontrol(lurb_priv->pipe) &&
 741             ((td->index == 0) || (td->index == lurb_priv->length - 1)))) {
 742                 if (tdBE != 0) {
 743                         if (td->hwCBP == 0)
 744                                 lurb_priv->actual_length += tdBE - td->data + 1;
 745                         else
 746                                 lurb_priv->actual_length += tdCBP - td->data;
 747                 }
 748         }
 749 }
 750
 751 /*-------------------------------------------------------------------------*/
 752
 753 /* replies to the request have to be on a FIFO basis so
 754  * we reverse the reversed done-list */
 755
 756 static td_t * dl_reverse_done_list (ohci_t *ohci)
 757 {
 758         __u32 td_list_hc;
 759         td_t *td_rev = NULL;
 760         td_t *td_list = NULL;
 761         urb_priv_t *lurb_priv = NULL;
 762
 763         td_list_hc = ohci_cpu_to_le32 (ohci->hcca->done_head) & 0xfffffff0;
 764         ohci->hcca->done_head = 0;
 765
 766         while (td_list_hc) {
 767                 td_list = (td_t *)td_list_hc;
 768
 769                 if (TD_CC_GET (ohci_cpu_to_le32 (td_list->hwINFO))) {
 770                         lurb_priv = &urb_priv;
 771                         dbg(" USB-error/status: %x : %p",
 772                                         TD_CC_GET (ohci_cpu_to_le32 (td_list->hwINFO)), td_list);
 773                         if (td_list->ed->hwHeadP & ohci_cpu_to_le32 (0x1)) {
 774                                 if (lurb_priv && ((td_list->index + 1) < lurb_priv->length)) {
 775                                         td_list->ed->hwHeadP =
 776                                                 (lurb_priv->td[lurb_priv->length - 1]->hwNextTD & ohci_cpu_to_le32 (0xfffffff0)) |
 777                                                                         (td_list->ed->hwHeadP & ohci_cpu_to_le32 (0x2));
 778                                         lurb_priv->td_cnt += lurb_priv->length - td_list->index - 1;
 779                                 } else
 780                                         td_list->ed->hwHeadP &= ohci_cpu_to_le32 (0xfffffff2);
 781                         }
 782                         td_list->hwNextTD = 0;
 783                 }
 784
 785                 td_list->next_dl_td = td_rev;
 786                 td_rev = td_list;
 787                 td_list_hc = ohci_cpu_to_le32 (td_list->hwNextTD) & 0xfffffff0;
 788         }
 789         return td_list;
 790 }
 791
 792 /*-------------------------------------------------------------------------*/
 793
 794 /* td done list */
 795 static int dl_done_list (ohci_t *ohci, td_t *td_list)
 796 {
 797         td_t *td_list_next = NULL;
 798         ed_t *ed;
 799         int cc = 0;
 800         int stat = 0;
 801         /* urb_t *urb; */
 802         urb_priv_t *lurb_priv;
 803         __u32 tdINFO, edHeadP, edTailP;
 804
 805         while (td_list) {
 806                 td_list_next = td_list->next_dl_td;
 807
 808                 lurb_priv = &urb_priv;
 809                 tdINFO = ohci_cpu_to_le32 (td_list->hwINFO);
 810
 811                 ed = td_list->ed;
 812
 813                 dl_transfer_length(td_list);
 814
 815                 /* error code of transfer */
 816                 cc = TD_CC_GET (tdINFO);
 817                 if (++(lurb_priv->td_cnt) == lurb_priv->length) {
 818                         if ((ed->state & (ED_OPER | ED_UNLINK))
 819                                         && (lurb_priv->state != URB_DEL)) {
 820                                 dbg("ConditionCode %#x", cc);
 821                                 stat = cc_to_error[cc];
 822                                 urb_finished = 1;
 823                         }
 824                 }
 825
 826                 if (ed->state != ED_NEW) {
 827                         edHeadP = ohci_cpu_to_le32 (ed->hwHeadP) & 0xfffffff0;
 828                         edTailP = ohci_cpu_to_le32 (ed->hwTailP);
 829
 830                         /* unlink eds if they are not busy */
 831                         if ((edHeadP == edTailP) && (ed->state == ED_OPER))
 832                                 ep_unlink (ohci, ed);
 833                 }
 834
 835                 td_list = td_list_next;
 836         }
 837         return stat;
 838 }
 839
 840 /*-------------------------------------------------------------------------*
 841  * Virtual Root Hub
 842  *-------------------------------------------------------------------------*/
 843
 844 #include <usbroothubdes.h>
 845
 846 /* Hub class-specific descriptor is constructed dynamically */
 847
 848
 849 /*-------------------------------------------------------------------------*/
 850
 851 #define OK(x)                   len = (x); break
 852 #ifdef DEBUG
 853 #define WR_RH_STAT(x)           {info("WR:status %#8x", (x));writel((x), &gohci.regs->roothub.status);}
 854 #define WR_RH_PORTSTAT(x)       {info("WR:portstatus[%d] %#8x", wIndex-1, (x));writel((x), &gohci.regs->roothub.portstatus[wIndex-1]);}
 855 #else
 856 #define WR_RH_STAT(x)           writel((x), &gohci.regs->roothub.status)
 857 #define WR_RH_PORTSTAT(x)       writel((x), &gohci.regs->roothub.portstatus[wIndex-1])
 858 #endif
 859 #define RD_RH_STAT              roothub_status(&gohci)
 860 #define RD_RH_PORTSTAT          roothub_portstatus(&gohci,wIndex-1)
 861
 862 /* request to virtual root hub */
 863
 864 int rh_check_port_status(ohci_t *controller)
 865 {
 866         __u32 temp, ndp, i;
 867         int res;
 868
 869         res = -1;
 870         temp = roothub_a (controller);
 871         ndp = (temp & RH_A_NDP);
 872         for (i = 0; i < ndp; i++) {
 873                 temp = roothub_portstatus (controller, i);
 874                 /* check for a device disconnect */
 875                 if (((temp & (RH_PS_PESC | RH_PS_CSC)) ==
 876                         (RH_PS_PESC | RH_PS_CSC)) &&
 877                         ((temp & RH_PS_CCS) == 0)) {
 878                         res = i;
 879                         break;
 880                 }
 881         }
 882         return res;
 883 }
 884
 885 static int ohci_submit_rh_msg(struct usb_device *dev, unsigned long pipe,
 886                 void *buffer, int transfer_len, struct devrequest *cmd)
 887 {
 888         void * data = buffer;
 889         int leni = transfer_len;
 890         int len = 0;
 891         int stat = 0;
 892         __u32 datab[4];
 893         __u8 *data_buf = (__u8 *)datab;
 894         __u16 bmRType_bReq;
 895         __u16 wValue;
 896         __u16 wIndex;
 897         __u16 wLength;
 898
 899 #ifdef DEBUG
 900 urb_priv.actual_length = 0;
 901 pkt_print(dev, pipe, buffer, transfer_len, cmd, "SUB(rh)", usb_pipein(pipe));
 902 #endif
 903         if (usb_pipeint(pipe)) {
 904                 info("Root-Hub submit IRQ: NOT implemented");
 905                 return 0;
 906         }
 907
 908         bmRType_bReq  = cmd->requesttype | (cmd->request << 8);
 909         wValue        = m16_swap (cmd->value);
 910         wIndex        = m16_swap (cmd->index);
 911         wLength       = m16_swap (cmd->length);
 912
 913         info("Root-Hub: adr: %2x cmd(%1x): %08x %04x %04x %04x",
 914                 dev->devnum, 8, bmRType_bReq, wValue, wIndex, wLength);
 915
 916         switch (bmRType_bReq) {
 917         /* Request Destination:
 918            without flags: Device,
 919            RH_INTERFACE: interface,
 920            RH_ENDPOINT: endpoint,
 921            RH_CLASS means HUB here,
 922            RH_OTHER | RH_CLASS  almost ever means HUB_PORT here
 923         */
 924
 925         case RH_GET_STATUS:
 926                         *(__u16 *) data_buf = m16_swap (1); OK (2);
 927         case RH_GET_STATUS | RH_INTERFACE:
 928                         *(__u16 *) data_buf = m16_swap (0); OK (2);
 929         case RH_GET_STATUS | RH_ENDPOINT:
 930                         *(__u16 *) data_buf = m16_swap (0); OK (2);
 931         case RH_GET_STATUS | RH_CLASS:
 932                         *(__u32 *) data_buf = m32_swap (
 933                                 RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE));
 934                         OK (4);
 935         case RH_GET_STATUS | RH_OTHER | RH_CLASS:
 936                         *(__u32 *) data_buf = m32_swap (RD_RH_PORTSTAT); OK (4);
 937
 938         case RH_CLEAR_FEATURE | RH_ENDPOINT:
 939                 switch (wValue) {
 940                         case (RH_ENDPOINT_STALL): OK (0);
 941                 }
 942                 break;
 943
 944         case RH_CLEAR_FEATURE | RH_CLASS:
 945                 switch (wValue) {
 946                         case RH_C_HUB_LOCAL_POWER:
 947                                 OK(0);
 948                         case (RH_C_HUB_OVER_CURRENT):
 949                                         WR_RH_STAT(RH_HS_OCIC); OK (0);
 950                 }
 951                 break;
 952
 953         case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
 954                 switch (wValue) {
 955                         case (RH_PORT_ENABLE):
 956                                         WR_RH_PORTSTAT (RH_PS_CCS ); OK (0);
 957                         case (RH_PORT_SUSPEND):
 958                                         WR_RH_PORTSTAT (RH_PS_POCI); OK (0);
 959                         case (RH_PORT_POWER):
 960                                         WR_RH_PORTSTAT (RH_PS_LSDA); OK (0);
 961                         case (RH_C_PORT_CONNECTION):
 962                                         WR_RH_PORTSTAT (RH_PS_CSC ); OK (0);
 963                         case (RH_C_PORT_ENABLE):
 964                                         WR_RH_PORTSTAT (RH_PS_PESC); OK (0);
 965                         case (RH_C_PORT_SUSPEND):
 966                                         WR_RH_PORTSTAT (RH_PS_PSSC); OK (0);
 967                         case (RH_C_PORT_OVER_CURRENT):
 968                                         WR_RH_PORTSTAT (RH_PS_OCIC); OK (0);
 969                         case (RH_C_PORT_RESET):
 970                                         WR_RH_PORTSTAT (RH_PS_PRSC); OK (0);
 971                 }
 972                 break;
 973
 974         case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
 975                 switch (wValue) {
 976                         case (RH_PORT_SUSPEND):
 977                                         WR_RH_PORTSTAT (RH_PS_PSS ); OK (0);
 978                         case (RH_PORT_RESET): /* BUG IN HUP CODE *********/
 979                                         if (RD_RH_PORTSTAT & RH_PS_CCS)
 980                                             WR_RH_PORTSTAT (RH_PS_PRS);
 981                                         OK (0);
 982                         case (RH_PORT_POWER):
 983                                         WR_RH_PORTSTAT (RH_PS_PPS ); OK (0);
 984                         case (RH_PORT_ENABLE): /* BUG IN HUP CODE *********/
 985                                         if (RD_RH_PORTSTAT & RH_PS_CCS)
 986                                             WR_RH_PORTSTAT (RH_PS_PES );
 987                                         OK (0);
 988                 }
 989                 break;
 990
 991         case RH_SET_ADDRESS: gohci.rh.devnum = wValue; OK(0);
 992
 993         case RH_GET_DESCRIPTOR:
 994                 switch ((wValue & 0xff00) >> 8) {
 995                         case (0x01): /* device descriptor */
 996                                 len = min_t(unsigned int,
 997                                           leni,
 998                                           min_t(unsigned int,
 999                                               sizeof (root_hub_dev_des),
1000                                               wLength));
1001                                 data_buf = root_hub_dev_des; OK(len);
1002                         case (0x02): /* configuration descriptor */
1003                                 len = min_t(unsigned int,
1004                                           leni,
1005                                           min_t(unsigned int,
1006                                               sizeof (root_hub_config_des),
1007                                               wLength));
1008                                 data_buf = root_hub_config_des; OK(len);
1009                         case (0x03): /* string descriptors */
1010                                 if(wValue==0x0300) {
1011                                         len = min_t(unsigned int,
1012                                                   leni,
1013                                                   min_t(unsigned int,
1014                                                       sizeof (root_hub_str_index0),
1015                                                       wLength));
1016                                         data_buf = root_hub_str_index0;
1017                                         OK(len);
1018                                 }
1019                                 if(wValue==0x0301) {
1020                                         len = min_t(unsigned int,
1021                                                   leni,
1022                                                   min_t(unsigned int,
1023                                                       sizeof (root_hub_str_index1),
1024                                                       wLength));
1025                                         data_buf = root_hub_str_index1;
1026                                         OK(len);
1027                         }
1028                         default:
1029                                 stat = USB_ST_STALLED;
1030                 }
1031                 break;
1032
1033         case RH_GET_DESCRIPTOR | RH_CLASS:
1034             {
1035                     __u32 temp = roothub_a (&gohci);
1036
1037                     data_buf [0] = 9;           /* min length; */
1038                     data_buf [1] = 0x29;
1039                     data_buf [2] = temp & RH_A_NDP;
1040                     data_buf [3] = 0;
1041                     if (temp & RH_A_PSM)        /* per-port power switching? */
1042                         data_buf [3] |= 0x1;
1043                     if (temp & RH_A_NOCP)       /* no overcurrent reporting? */
1044                         data_buf [3] |= 0x10;
1045                     else if (temp & RH_A_OCPM)  /* per-port overcurrent reporting? */
1046                         data_buf [3] |= 0x8;
1047
1048                     /* corresponds to data_buf[4-7] */
1049                     datab [1] = 0;
1050                     data_buf [5] = (temp & RH_A_POTPGT) >> 24;
1051                     temp = roothub_b (&gohci);
1052                     data_buf [7] = temp & RH_B_DR;
1053                     if (data_buf [2] < 7) {
1054                         data_buf [8] = 0xff;
1055                     } else {
1056                         data_buf [0] += 2;
1057                         data_buf [8] = (temp & RH_B_DR) >> 8;
1058                         data_buf [10] = data_buf [9] = 0xff;
1059                     }
1060
1061                     len = min_t(unsigned int, leni,
1062                               min_t(unsigned int, data_buf [0], wLength));
1063                     OK (len);
1064                 }
1065
1066         case RH_GET_CONFIGURATION:      *(__u8 *) data_buf = 0x01; OK (1);
1067
1068         case RH_SET_CONFIGURATION:      WR_RH_STAT (0x10000); OK (0);
1069
1070         default:
1071                 dbg ("unsupported root hub command");
1072                 stat = USB_ST_STALLED;
1073         }
1074
1075 #ifdef  DEBUG
1076         ohci_dump_roothub (&gohci, 1);
1077 #endif
1078
1079         len = min_t(int, len, leni);
1080         if (data != data_buf)
1081             memcpy (data, data_buf, len);
1082         dev->act_len = len;
1083         dev->status = stat;
1084
1085 #ifdef DEBUG
1086         if (transfer_len)
1087                 urb_priv.actual_length = transfer_len;
1088         pkt_print(dev, pipe, buffer, transfer_len, cmd, "RET(rh)", 0/*usb_pipein(pipe)*/);
1089 #endif
1090
1091         return stat;
1092 }
1093
1094 /*-------------------------------------------------------------------------*/
1095
1096 /* common code for handling submit messages - used for all but root hub */
1097 /* accesses. */
1098 int submit_common_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1099                 int transfer_len, struct devrequest *setup, int interval)
1100 {
1101         int stat = 0;
1102         int maxsize = usb_maxpacket(dev, pipe);
1103         int timeout;
1104
1105         /* device pulled? Shortcut the action. */
1106         if (devgone == dev) {
1107                 dev->status = USB_ST_CRC_ERR;
1108                 return 0;
1109         }
1110
1111 #ifdef DEBUG
1112         urb_priv.actual_length = 0;
1113         pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB", usb_pipein(pipe));
1114 #endif
1115         if (!maxsize) {
1116                 err("submit_common_message: pipesize for pipe %lx is zero",
1117                         pipe);
1118                 return -1;
1119         }
1120
1121         if (sohci_submit_job(dev, pipe, buffer, transfer_len, setup, interval) < 0) {
1122                 err("sohci_submit_job failed");
1123                 return -1;
1124         }
1125
1126         /* allow more time for a BULK device to react - some are slow */
1127 #define BULK_TO  5000   /* timeout in milliseconds */
1128         if (usb_pipebulk(pipe))
1129                 timeout = BULK_TO;
1130         else
1131                 timeout = 100;
1132
1133         /* wait for it to complete */
1134         for (;;) {
1135                 /* check whether the controller is done */
1136                 stat = hc_interrupt();
1137                 if (stat < 0) {
1138                         stat = USB_ST_CRC_ERR;
1139                         break;
1140                 }
1141
1142                 /* NOTE: since we are not interrupt driven in U-Boot and always
1143                  * handle only one URB at a time, we cannot assume the
1144                  * transaction finished on the first successful return from
1145                  * hc_interrupt().. unless the flag for current URB is set,
1146                  * meaning that all TD's to/from device got actually
1147                  * transferred and processed. If the current URB is not
1148                  * finished we need to re-iterate this loop so as
1149                  * hc_interrupt() gets called again as there needs to be some
1150                  * more TD's to process still */
1151                 if ((stat >= 0) && (stat != 0xff) && (urb_finished)) {
1152                         /* 0xff is returned for an SF-interrupt */
1153                         break;
1154                 }
1155
1156                 if (--timeout) {
1157                         mdelay(1);
1158                         if (!urb_finished)
1159                                 dbg("\%");
1160
1161                 } else {
1162                         err("CTL:TIMEOUT ");
1163                         dbg("submit_common_msg: TO status %x\n", stat);
1164                         stat = USB_ST_CRC_ERR;
1165                         urb_finished = 1;
1166                         break;
1167                 }
1168         }
1169 #if 0
1170         /* we got an Root Hub Status Change interrupt */
1171         if (got_rhsc) {
1172 #ifdef DEBUG
1173                 ohci_dump_roothub (&gohci, 1);
1174 #endif
1175                 got_rhsc = 0;
1176                 /* abuse timeout */
1177                 timeout = rh_check_port_status(&gohci);
1178                 if (timeout >= 0) {
1179 #if 0 /* this does nothing useful, but leave it here in case that changes */
1180                         /* the called routine adds 1 to the passed value */
1181                         usb_hub_port_connect_change(gohci.rh.dev, timeout - 1);
1182 #endif
1183                         /*
1184                          * XXX
1185                          * This is potentially dangerous because it assumes
1186                          * that only one device is ever plugged in!
1187                          */
1188                         devgone = dev;
1189                 }
1190         }
1191 #endif
1192
1193         dev->status = stat;
1194         dev->act_len = transfer_len;
1195
1196 #ifdef DEBUG
1197         pkt_print(dev, pipe, buffer, transfer_len, setup, "RET(ctlr)", usb_pipein(pipe));
1198 #endif
1199
1200         /* free TDs in urb_priv */
1201         urb_free_priv (&urb_priv);
1202         return 0;
1203 }
1204
1205 /* submit routines called from usb.c */
1206 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1207                 int transfer_len)
1208 {
1209         info("submit_bulk_msg");
1210         return submit_common_msg(dev, pipe, buffer, transfer_len, NULL, 0);
1211 }
1212
1213 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1214                 int transfer_len, struct devrequest *setup)
1215 {
1216         int maxsize = usb_maxpacket(dev, pipe);
1217
1218         info("submit_control_msg");
1219 #ifdef DEBUG
1220         urb_priv.actual_length = 0;
1221         pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB", usb_pipein(pipe));
1222 #endif
1223         if (!maxsize) {
1224                 err("submit_control_message: pipesize for pipe %lx is zero",
1225                         pipe);
1226                 return -1;
1227         }
1228         if (((pipe >> 8) & 0x7f) == gohci.rh.devnum) {
1229                 gohci.rh.dev = dev;
1230                 /* root hub - redirect */
1231                 return ohci_submit_rh_msg(dev, pipe, buffer, transfer_len,
1232                         setup);
1233         }
1234
1235         return submit_common_msg(dev, pipe, buffer, transfer_len, setup, 0);
1236 }
1237
1238 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1239                 int transfer_len, int interval)
1240 {
1241         info("submit_int_msg");
1242         return -1;
1243 }
1244
1245 /*-------------------------------------------------------------------------*
1246  * HC functions
1247  *-------------------------------------------------------------------------*/
1248
1249 /* reset the HC and BUS */
1250
1251 static int hc_reset (ohci_t *ohci)
1252 {
1253         int timeout = 30;
1254         int smm_timeout = 50; /* 0,5 sec */
1255
1256         if (readl (&ohci->regs->control) & OHCI_CTRL_IR) { /* SMM owns the HC */
1257                 writel (OHCI_OCR, &ohci->regs->cmdstatus); /* request ownership */
1258                 info("USB HC TakeOver from SMM");
1259                 while (readl (&ohci->regs->control) & OHCI_CTRL_IR) {
1260                         mdelay (10);
1261                         if (--smm_timeout == 0) {
1262                                 err("USB HC TakeOver failed!");
1263                                 return -1;
1264                         }
1265                 }
1266         }
1267
1268         /* Disable HC interrupts */
1269         writel (OHCI_INTR_MIE, &ohci->regs->intrdisable);
1270
1271         dbg("USB HC reset_hc usb-%s: ctrl = 0x%X ;",
1272                 ohci->slot_name,
1273                 readl (&ohci->regs->control));
1274
1275         /* Reset USB (needed by some controllers) */
1276         ohci->hc_control = 0;
1277         writel (ohci->hc_control, &ohci->regs->control);
1278
1279         /* HC Reset requires max 10 us delay */
1280         writel (OHCI_HCR,  &ohci->regs->cmdstatus);
1281         while ((readl (&ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
1282                 if (--timeout == 0) {
1283                         err("USB HC reset timed out!");
1284                         return -1;
1285                 }
1286                 udelay (1);
1287         }
1288         return 0;
1289 }
1290
1291 /*-------------------------------------------------------------------------*/
1292
1293 /* Start an OHCI controller, set the BUS operational
1294  * enable interrupts
1295  * connect the virtual root hub */
1296
1297 static int hc_start (ohci_t * ohci)
1298 {
1299         __u32 mask;
1300         unsigned int fminterval;
1301
1302         ohci->disabled = 1;
1303
1304         /* Tell the controller where the control and bulk lists are
1305          * The lists are empty now. */
1306
1307         writel (0, &ohci->regs->ed_controlhead);
1308         writel (0, &ohci->regs->ed_bulkhead);
1309
1310         writel ((__u32)ohci->hcca, &ohci->regs->hcca); /* a reset clears this */
1311
1312         fminterval = 0x2edf;
1313         writel ((fminterval * 9) / 10, &ohci->regs->periodicstart);
1314         fminterval |= ((((fminterval - 210) * 6) / 7) << 16);
1315         writel (fminterval, &ohci->regs->fminterval);
1316         writel (0x628, &ohci->regs->lsthresh);
1317
1318         /* start controller operations */
1319         ohci->hc_control = OHCI_CONTROL_INIT | OHCI_USB_OPER;
1320         ohci->disabled = 0;
1321         writel (ohci->hc_control, &ohci->regs->control);
1322
1323         /* disable all interrupts */
1324         mask = (OHCI_INTR_SO | OHCI_INTR_WDH | OHCI_INTR_SF | OHCI_INTR_RD |
1325                         OHCI_INTR_UE | OHCI_INTR_FNO | OHCI_INTR_RHSC |
1326                         OHCI_INTR_OC | OHCI_INTR_MIE);
1327         writel (mask, &ohci->regs->intrdisable);
1328         /* clear all interrupts */
1329         mask &= ~OHCI_INTR_MIE;
1330         writel (mask, &ohci->regs->intrstatus);
1331         /* Choose the interrupts we care about now  - but w/o MIE */
1332         mask = OHCI_INTR_RHSC | OHCI_INTR_UE | OHCI_INTR_WDH | OHCI_INTR_SO;
1333         writel (mask, &ohci->regs->intrenable);
1334
1335 #ifdef  OHCI_USE_NPS
1336         /* required for AMD-756 and some Mac platforms */
1337         writel ((roothub_a (ohci) | RH_A_NPS) & ~RH_A_PSM,
1338                 &ohci->regs->roothub.a);
1339         writel (RH_HS_LPSC, &ohci->regs->roothub.status);
1340 #endif  /* OHCI_USE_NPS */
1341
1342         /* POTPGT delay is bits 24-31, in 2 ms units. */
1343         mdelay ((roothub_a (ohci) >> 23) & 0x1fe);
1344
1345         /* connect the virtual root hub */
1346         ohci->rh.devnum = 0;
1347
1348         return 0;
1349 }
1350
1351 /*-------------------------------------------------------------------------*/
1352
1353 /* an interrupt happens */
1354
1355 static int
1356 hc_interrupt (void)
1357 {
1358         ohci_t *ohci = &gohci;
1359         struct ohci_regs *regs = ohci->regs;
1360         int ints;
1361         int stat = -1;
1362
1363         if ((ohci->hcca->done_head != 0) &&
1364              !(ohci_cpu_to_le32(ohci->hcca->done_head) & 0x01)) {
1365
1366                 ints =  OHCI_INTR_WDH;
1367
1368         } else if ((ints = readl (&regs->intrstatus)) == ~(u32)0) {
1369                 ohci->disabled++;
1370                 err ("%s device removed!", ohci->slot_name);
1371                 return -1;
1372
1373         } else if ((ints &= readl (&regs->intrenable)) == 0) {
1374                 dbg("hc_interrupt: returning..\n");
1375                 return 0xff;
1376         }
1377
1378         /* dbg("Interrupt: %x frame: %x", ints, le16_to_cpu (ohci->hcca->frame_no)); */
1379
1380         if (ints & OHCI_INTR_RHSC) {
1381                 got_rhsc = 1;
1382                 stat = 0xff;
1383         }
1384
1385         if (ints & OHCI_INTR_UE) {
1386                 ohci->disabled++;
1387                 err ("OHCI Unrecoverable Error, controller usb-%s disabled",
1388                         ohci->slot_name);
1389                 /* e.g. due to PCI Master/Target Abort */
1390
1391 #ifdef  DEBUG
1392                 ohci_dump (ohci, 1);
1393 #endif
1394                 /* FIXME: be optimistic, hope that bug won't repeat often. */
1395                 /* Make some non-interrupt context restart the controller. */
1396                 /* Count and limit the retries though; either hardware or */
1397                 /* software errors can go forever... */
1398                 hc_reset (ohci);
1399                 return -1;
1400         }
1401
1402         if (ints & OHCI_INTR_WDH) {
1403                 writel (OHCI_INTR_WDH, &regs->intrdisable);
1404                 stat = dl_done_list (&gohci, dl_reverse_done_list (&gohci));
1405                 writel (OHCI_INTR_WDH, &regs->intrenable);
1406         }
1407
1408         if (ints & OHCI_INTR_SO) {
1409                 dbg("USB Schedule overrun\n");
1410                 writel (OHCI_INTR_SO, &regs->intrenable);
1411                 stat = -1;
1412         }
1413
1414         /* FIXME:  this assumes SOF (1/ms) interrupts don't get lost... */
1415         if (ints & OHCI_INTR_SF) {
1416                 unsigned int frame = ohci_cpu_to_le16 (ohci->hcca->frame_no) & 1;
1417                 mdelay(1);
1418                 writel (OHCI_INTR_SF, &regs->intrdisable);
1419                 if (ohci->ed_rm_list[frame] != NULL)
1420                         writel (OHCI_INTR_SF, &regs->intrenable);
1421                 stat = 0xff;
1422         }
1423
1424         writel (ints, &regs->intrstatus);
1425         return stat;
1426 }
1427
1428 /*-------------------------------------------------------------------------*/
1429
1430 /*-------------------------------------------------------------------------*/
1431
1432 /* De-allocate all resources.. */
1433
1434 static void hc_release_ohci (ohci_t *ohci)
1435 {
1436         dbg ("USB HC release ohci usb-%s", ohci->slot_name);
1437
1438         if (!ohci->disabled)
1439                 hc_reset (ohci);
1440 }
1441
1442 /*-------------------------------------------------------------------------*/
1443
1444 /*
1445  * low level initalisation routine, called from usb.c
1446  */
1447 static char ohci_inited = 0;
1448
1449 int usb_lowlevel_init(int index, enum usb_init_type init, void **controller)
1450 {
1451
1452         /* Set the USB Clock                                                 */
1453         *(vu_long *)MPC5XXX_CDM_48_FDC = CONFIG_USB_CLOCK;
1454
1455 #ifdef CONFIG_PSC3_USB /* USB is using the alternate configuration */
1456         /* remove all PSC3 USB bits first before ORing in ours */
1457         *(vu_long *)MPC5XXX_GPS_PORT_CONFIG &= ~0x00804f00;
1458 #else
1459         /* remove all USB bits first before ORing in ours */
1460         *(vu_long *)MPC5XXX_GPS_PORT_CONFIG &= ~0x00807000;
1461 #endif
1462         /* Activate USB port                                                 */
1463         *(vu_long *)MPC5XXX_GPS_PORT_CONFIG |= CONFIG_USB_CONFIG;
1464
1465         memset (&gohci, 0, sizeof (ohci_t));
1466         memset (&urb_priv, 0, sizeof (urb_priv_t));
1467
1468         /* align the storage */
1469         if ((__u32)&ghcca[0] & 0xff) {
1470                 err("HCCA not aligned!!");
1471                 return -1;
1472         }
1473         phcca = &ghcca[0];
1474         info("aligned ghcca %p", phcca);
1475         memset(&ohci_dev, 0, sizeof(struct ohci_device));
1476         if ((__u32)&ohci_dev.ed[0] & 0x7) {
1477                 err("EDs not aligned!!");
1478                 return -1;
1479         }
1480         memset(gtd, 0, sizeof(td_t) * (NUM_TD + 1));
1481         if ((__u32)gtd & 0x7) {
1482                 err("TDs not aligned!!");
1483                 return -1;
1484         }
1485         ptd = gtd;
1486         gohci.hcca = phcca;
1487         memset (phcca, 0, sizeof (struct ohci_hcca));
1488
1489         gohci.disabled = 1;
1490         gohci.sleeping = 0;
1491         gohci.irq = -1;
1492         gohci.regs = (struct ohci_regs *)MPC5XXX_USB;
1493
1494         gohci.flags = 0;
1495         gohci.slot_name = "mpc5200";
1496
1497         if (hc_reset (&gohci) < 0) {
1498                 hc_release_ohci (&gohci);
1499                 return -1;
1500         }
1501
1502         if (hc_start (&gohci) < 0) {
1503                 err ("can't start usb-%s", gohci.slot_name);
1504                 hc_release_ohci (&gohci);
1505                 return -1;
1506         }
1507
1508 #ifdef  DEBUG
1509         ohci_dump (&gohci, 1);
1510 #endif
1511         ohci_inited = 1;
1512         urb_finished = 1;
1513
1514         return 0;
1515 }
1516
1517 int usb_lowlevel_stop(int index)
1518 {
1519         /* this gets called really early - before the controller has */
1520         /* even been initialized! */
1521         if (!ohci_inited)
1522                 return 0;
1523         /* TODO release any interrupts, etc. */
1524         /* call hc_release_ohci() here ? */
1525         hc_reset (&gohci);
1526         return 0;
1527 }
1528
1529 #endif /* CONFIG_USB_OHCI */