cpu/arm920t/usb_ohci.c

   1 /*
   2  * URB OHCI HCD (Host Controller Driver) for USB on the S3C2400.
   3  *
   4  * (C) Copyright 2003
   5  * Gary Jennejohn, DENX Software Engineering <gj@denx.de>
   6  *
   7  * See file CREDITS for list of people who contributed to this
   8  * project.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of
  13  * the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23  * MA 02111-1307 USA
  24  *
  25  * Note: Part of this code has been derived from linux
  26  *
  27  */
  28 /*
  29  * IMPORTANT NOTES
  30  * 1 - you MUST define LITTLEENDIAN in the configuration file for the
  31  *     board or this driver will NOT work!
  32  * 2 - this driver is intended for use with USB Mass Storage Devices
  33  *     (BBB) ONLY. There is NO support for Interrupt or Isochronous pipes!
  34  */
  35
  36 #include <common.h>
  37 /* #include <pci.h> no PCI on the S3C2400 */
  38
  39 #ifdef CONFIG_USB_OHCI
  40
  41 #include <s3c2400.h>
  42 #include <malloc.h>
  43 #include <usb.h>
  44 #include "usb_ohci.h"
  45
  46 #define OHCI_USE_NPS            /* force NoPowerSwitching mode */
  47 #undef OHCI_VERBOSE_DEBUG       /* not always helpful */
  48
  49
  50 /* For initializing controller (mask in an HCFS mode too) */
  51 #define OHCI_CONTROL_INIT \
  52         (OHCI_CTRL_CBSR & 0x3) | OHCI_CTRL_IE | OHCI_CTRL_PLE
  53
  54 #define OHCI_UNLINK_TIMEOUT     (CFG_HZ / 10)
  55
  56 #define readl(a) (*((vu_long *)(a)))
  57 #define writel(a, b) (*((vu_long *)(b)) = ((vu_long)a))
  58
  59 #define min_t(type,x,y) ({ type __x = (x); type __y = (y); __x < __y ? __x: __y; })
  60
  61 #undef DEBUG
  62 #ifdef DEBUG
  63 #define dbg(format, arg...) printf("DEBUG: " format "\n", ## arg)
  64 #else
  65 #define dbg(format, arg...) do {} while(0)
  66 #endif /* DEBUG */
  67 #define err(format, arg...) printf("ERROR: " format "\n", ## arg)
  68 #undef SHOW_INFO
  69 #ifdef SHOW_INFO
  70 #define info(format, arg...) printf("INFO: " format "\n", ## arg)
  71 #else
  72 #define info(format, arg...) do {} while(0)
  73 #endif
  74
  75 #define m16_swap(x) swap_16(x)
  76 #define m32_swap(x) swap_32(x)
  77
  78 /* global ohci_t */
  79 static ohci_t gohci;
  80 /* this must be aligned to a 256 byte boundary */
  81 struct ohci_hcca ghcca[1];
  82 /* a pointer to the aligned storage */
  83 struct ohci_hcca *phcca;
  84 /* this allocates EDs for all possible endpoints */
  85 struct ohci_device ohci_dev;
  86 /* urb_priv */
  87 urb_priv_t urb_priv;
  88
  89 /*-------------------------------------------------------------------------*/
  90
  91 /* AMD-756 (D2 rev) reports corrupt register contents in some cases.
  92  * The erratum (#4) description is incorrect.  AMD's workaround waits
  93  * till some bits (mostly reserved) are clear; ok for all revs.
  94  */
  95 #define OHCI_QUIRK_AMD756 0xabcd
  96 #define read_roothub(hc, register, mask) ({ \
  97         u32 temp = readl (&hc->regs->roothub.register); \
  98         if (hc->flags & OHCI_QUIRK_AMD756) \
  99                 while (temp & mask) \
 100                         temp = readl (&hc->regs->roothub.register); \
 101         temp; })
 102
 103 static u32 roothub_a (struct ohci *hc)
 104         { return read_roothub (hc, a, 0xfc0fe000); }
 105 static inline u32 roothub_b (struct ohci *hc)
 106         { return readl (&hc->regs->roothub.b); }
 107 static inline u32 roothub_status (struct ohci *hc)
 108         { return readl (&hc->regs->roothub.status); }
 109 static u32 roothub_portstatus (struct ohci *hc, int i)
 110         { return read_roothub (hc, portstatus [i], 0xffe0fce0); }
 111
 112
 113 /* forward declaration */
 114 static int hc_interrupt (void);
 115 static void
 116 td_submit_job (struct usb_device * dev, unsigned long pipe, void * buffer,
 117         int transfer_len, struct devrequest * setup, urb_priv_t * urb, int interval);
 118
 119 /*-------------------------------------------------------------------------*
 120  * URB support functions
 121  *-------------------------------------------------------------------------*/
 122
 123 /* free HCD-private data associated with this URB */
 124
 125 static void urb_free_priv (urb_priv_t * urb)
 126 {
 127         int             i;
 128         int             last;
 129         struct td       * td;
 130
 131         last = urb->length - 1;
 132         if (last >= 0) {
 133                 for (i = 0; i <= last; i++) {
 134                         td = urb->td[i];
 135                         if (td) {
 136                                 td->usb_dev = NULL;
 137                                 urb->td[i] = NULL;
 138                         }
 139                 }
 140         }
 141 }
 142
 143 /*-------------------------------------------------------------------------*/
 144
 145 #ifdef DEBUG
 146 static int sohci_get_current_frame_number (struct usb_device * dev);
 147
 148 /* debug| print the main components of an URB
 149  * small: 0) header + data packets 1) just header */
 150
 151 static void pkt_print (struct usb_device * dev, unsigned long pipe, void * buffer,
 152         int transfer_len, struct devrequest * setup, char * str, int small)
 153 {
 154         urb_priv_t * purb = &urb_priv;
 155
 156         dbg("%s URB:[%4x] dev:%2d,ep:%2d-%c,type:%s,len:%d/%d stat:%#lx",
 157                         str,
 158                         sohci_get_current_frame_number (dev),
 159                         usb_pipedevice (pipe),
 160                         usb_pipeendpoint (pipe),
 161                         usb_pipeout (pipe)? 'O': 'I',
 162                         usb_pipetype (pipe) < 2? (usb_pipeint (pipe)? "INTR": "ISOC"):
 163                                 (usb_pipecontrol (pipe)? "CTRL": "BULK"),
 164                         purb->actual_length,
 165                         transfer_len, dev->status);
 166 #ifdef  OHCI_VERBOSE_DEBUG
 167         if (!small) {
 168                 int i, len;
 169
 170                 if (usb_pipecontrol (pipe)) {
 171                         printf (__FILE__ ": cmd(8):");
 172                         for (i = 0; i < 8 ; i++)
 173                                 printf (" %02x", ((__u8 *) setup) [i]);
 174                         printf ("\n");
 175                 }
 176                 if (transfer_len > 0 && buffer) {
 177                         printf (__FILE__ ": data(%d/%d):",
 178                                 purb->actual_length,
 179                                 transfer_len);
 180                         len = usb_pipeout (pipe)?
 181                                         transfer_len: purb->actual_length;
 182                         for (i = 0; i < 16 && i < len; i++)
 183                                 printf (" %02x", ((__u8 *) buffer) [i]);
 184                         printf ("%s\n", i < len? "...": "");
 185                 }
 186         }
 187 #endif
 188 }
 189
 190 /* just for debugging; prints non-empty branches of the int ed tree inclusive iso eds*/
 191 void ep_print_int_eds (ohci_t *ohci, char * str) {
 192         int i, j;
 193          __u32 * ed_p;
 194         for (i= 0; i < 32; i++) {
 195                 j = 5;
 196                 ed_p = &(ohci->hcca->int_table [i]);
 197                 if (*ed_p == 0)
 198                     continue;
 199                 printf (__FILE__ ": %s branch int %2d(%2x):", str, i, i);
 200                 while (*ed_p != 0 && j--) {
 201                         ed_t *ed = (ed_t *)m32_swap(ed_p);
 202                         printf (" ed: %4x;", ed->hwINFO);
 203                         ed_p = &ed->hwNextED;
 204                 }
 205                 printf ("\n");
 206         }
 207 }
 208
 209 static void ohci_dump_intr_mask (char *label, __u32 mask)
 210 {
 211         dbg ("%s: 0x%08x%s%s%s%s%s%s%s%s%s",
 212                 label,
 213                 mask,
 214                 (mask & OHCI_INTR_MIE) ? " MIE" : "",
 215                 (mask & OHCI_INTR_OC) ? " OC" : "",
 216                 (mask & OHCI_INTR_RHSC) ? " RHSC" : "",
 217                 (mask & OHCI_INTR_FNO) ? " FNO" : "",
 218                 (mask & OHCI_INTR_UE) ? " UE" : "",
 219                 (mask & OHCI_INTR_RD) ? " RD" : "",
 220                 (mask & OHCI_INTR_SF) ? " SF" : "",
 221                 (mask & OHCI_INTR_WDH) ? " WDH" : "",
 222                 (mask & OHCI_INTR_SO) ? " SO" : ""
 223                 );
 224 }
 225
 226 static void maybe_print_eds (char *label, __u32 value)
 227 {
 228         ed_t *edp = (ed_t *)value;
 229
 230         if (value) {
 231                 dbg ("%s %08x", label, value);
 232                 dbg ("%08x", edp->hwINFO);
 233                 dbg ("%08x", edp->hwTailP);
 234                 dbg ("%08x", edp->hwHeadP);
 235                 dbg ("%08x", edp->hwNextED);
 236         }
 237 }
 238
 239 static char * hcfs2string (int state)
 240 {
 241         switch (state) {
 242                 case OHCI_USB_RESET:    return "reset";
 243                 case OHCI_USB_RESUME:   return "resume";
 244                 case OHCI_USB_OPER:     return "operational";
 245                 case OHCI_USB_SUSPEND:  return "suspend";
 246         }
 247         return "?";
 248 }
 249
 250 /* dump control and status registers */
 251 static void ohci_dump_status (ohci_t *controller)
 252 {
 253         struct ohci_regs        *regs = controller->regs;
 254         __u32                   temp;
 255
 256         temp = readl (&regs->revision) & 0xff;
 257         if (temp != 0x10)
 258                 dbg ("spec %d.%d", (temp >> 4), (temp & 0x0f));
 259
 260         temp = readl (&regs->control);
 261         dbg ("control: 0x%08x%s%s%s HCFS=%s%s%s%s%s CBSR=%d", temp,
 262                 (temp & OHCI_CTRL_RWE) ? " RWE" : "",
 263                 (temp & OHCI_CTRL_RWC) ? " RWC" : "",
 264                 (temp & OHCI_CTRL_IR) ? " IR" : "",
 265                 hcfs2string (temp & OHCI_CTRL_HCFS),
 266                 (temp & OHCI_CTRL_BLE) ? " BLE" : "",
 267                 (temp & OHCI_CTRL_CLE) ? " CLE" : "",
 268                 (temp & OHCI_CTRL_IE) ? " IE" : "",
 269                 (temp & OHCI_CTRL_PLE) ? " PLE" : "",
 270                 temp & OHCI_CTRL_CBSR
 271                 );
 272
 273         temp = readl (&regs->cmdstatus);
 274         dbg ("cmdstatus: 0x%08x SOC=%d%s%s%s%s", temp,
 275                 (temp & OHCI_SOC) >> 16,
 276                 (temp & OHCI_OCR) ? " OCR" : "",
 277                 (temp & OHCI_BLF) ? " BLF" : "",
 278                 (temp & OHCI_CLF) ? " CLF" : "",
 279                 (temp & OHCI_HCR) ? " HCR" : ""
 280                 );
 281
 282         ohci_dump_intr_mask ("intrstatus", readl (&regs->intrstatus));
 283         ohci_dump_intr_mask ("intrenable", readl (&regs->intrenable));
 284
 285         maybe_print_eds ("ed_periodcurrent", readl (&regs->ed_periodcurrent));
 286
 287         maybe_print_eds ("ed_controlhead", readl (&regs->ed_controlhead));
 288         maybe_print_eds ("ed_controlcurrent", readl (&regs->ed_controlcurrent));
 289
 290         maybe_print_eds ("ed_bulkhead", readl (&regs->ed_bulkhead));
 291         maybe_print_eds ("ed_bulkcurrent", readl (&regs->ed_bulkcurrent));
 292
 293         maybe_print_eds ("donehead", readl (&regs->donehead));
 294 }
 295
 296 static void ohci_dump_roothub (ohci_t *controller, int verbose)
 297 {
 298         __u32                   temp, ndp, i;
 299
 300         temp = roothub_a (controller);
 301         ndp = (temp & RH_A_NDP);
 302
 303         if (verbose) {
 304                 dbg ("roothub.a: %08x POTPGT=%d%s%s%s%s%s NDP=%d", temp,
 305                         ((temp & RH_A_POTPGT) >> 24) & 0xff,
 306                         (temp & RH_A_NOCP) ? " NOCP" : "",
 307                         (temp & RH_A_OCPM) ? " OCPM" : "",
 308                         (temp & RH_A_DT) ? " DT" : "",
 309                         (temp & RH_A_NPS) ? " NPS" : "",
 310                         (temp & RH_A_PSM) ? " PSM" : "",
 311                         ndp
 312                         );
 313                 temp = roothub_b (controller);
 314                 dbg ("roothub.b: %08x PPCM=%04x DR=%04x",
 315                         temp,
 316                         (temp & RH_B_PPCM) >> 16,
 317                         (temp & RH_B_DR)
 318                         );
 319                 temp = roothub_status (controller);
 320                 dbg ("roothub.status: %08x%s%s%s%s%s%s",
 321                         temp,
 322                         (temp & RH_HS_CRWE) ? " CRWE" : "",
 323                         (temp & RH_HS_OCIC) ? " OCIC" : "",
 324                         (temp & RH_HS_LPSC) ? " LPSC" : "",
 325                         (temp & RH_HS_DRWE) ? " DRWE" : "",
 326                         (temp & RH_HS_OCI) ? " OCI" : "",
 327                         (temp & RH_HS_LPS) ? " LPS" : ""
 328                         );
 329         }
 330
 331         for (i = 0; i < ndp; i++) {
 332                 temp = roothub_portstatus (controller, i);
 333                 dbg ("roothub.portstatus [%d] = 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s",
 334                         i,
 335                         temp,
 336                         (temp & RH_PS_PRSC) ? " PRSC" : "",
 337                         (temp & RH_PS_OCIC) ? " OCIC" : "",
 338                         (temp & RH_PS_PSSC) ? " PSSC" : "",
 339                         (temp & RH_PS_PESC) ? " PESC" : "",
 340                         (temp & RH_PS_CSC) ? " CSC" : "",
 341
 342                         (temp & RH_PS_LSDA) ? " LSDA" : "",
 343                         (temp & RH_PS_PPS) ? " PPS" : "",
 344                         (temp & RH_PS_PRS) ? " PRS" : "",
 345                         (temp & RH_PS_POCI) ? " POCI" : "",
 346                         (temp & RH_PS_PSS) ? " PSS" : "",
 347
 348                         (temp & RH_PS_PES) ? " PES" : "",
 349                         (temp & RH_PS_CCS) ? " CCS" : ""
 350                         );
 351         }
 352 }
 353
 354 static void ohci_dump (ohci_t *controller, int verbose)
 355 {
 356         dbg ("OHCI controller usb-%s state", controller->slot_name);
 357
 358         /* dumps some of the state we know about */
 359         ohci_dump_status (controller);
 360         if (verbose)
 361                 ep_print_int_eds (controller, "hcca");
 362         dbg ("hcca frame #%04x", controller->hcca->frame_no);
 363         ohci_dump_roothub (controller, 1);
 364 }
 365
 366
 367 #endif /* DEBUG */
 368
 369 /*-------------------------------------------------------------------------*
 370  * Interface functions (URB)
 371  *-------------------------------------------------------------------------*/
 372
 373 /* get a transfer request */
 374
 375 int sohci_submit_job(struct usb_device *dev, unsigned long pipe, void *buffer,
 376                 int transfer_len, struct devrequest *setup, int interval)
 377 {
 378         ohci_t *ohci;
 379         ed_t * ed;
 380         urb_priv_t *purb_priv;
 381         int i, size = 0;
 382
 383         ohci = &gohci;
 384
 385         /* when controller's hung, permit only roothub cleanup attempts
 386          * such as powering down ports */
 387         if (ohci->disabled) {
 388                 err("sohci_submit_job: EPIPE");
 389                 return -1;
 390         }
 391
 392         /* every endpoint has a ed, locate and fill it */
 393         if (!(ed = ep_add_ed (dev, pipe))) {
 394                 err("sohci_submit_job: ENOMEM");
 395                 return -1;
 396         }
 397
 398         /* for the private part of the URB we need the number of TDs (size) */
 399         switch (usb_pipetype (pipe)) {
 400                 case PIPE_BULK: /* one TD for every 4096 Byte */
 401                         size = (transfer_len - 1) / 4096 + 1;
 402                         break;
 403                 case PIPE_CONTROL: /* 1 TD for setup, 1 for ACK and 1 for every 4096 B */
 404                         size = (transfer_len == 0)? 2:
 405                                                 (transfer_len - 1) / 4096 + 3;
 406                         break;
 407         }
 408
 409         if (size >= (N_URB_TD - 1)) {
 410                 err("need %d TDs, only have %d", size, N_URB_TD);
 411                 return -1;
 412         }
 413         purb_priv = &urb_priv;
 414         purb_priv->pipe = pipe;
 415
 416         /* fill the private part of the URB */
 417         purb_priv->length = size;
 418         purb_priv->ed = ed;
 419         purb_priv->actual_length = 0;
 420
 421         /* allocate the TDs */
 422         /* note that td[0] was allocated in ep_add_ed */
 423         for (i = 0; i < size; i++) {
 424                 purb_priv->td[i] = td_alloc (dev);
 425                 if (!purb_priv->td[i]) {
 426                         purb_priv->length = i;
 427                         urb_free_priv (purb_priv);
 428                         err("sohci_submit_job: ENOMEM");
 429                         return -1;
 430                 }
 431         }
 432
 433         if (ed->state == ED_NEW || (ed->state & ED_DEL)) {
 434                 urb_free_priv (purb_priv);
 435                 err("sohci_submit_job: EINVAL");
 436                 return -1;
 437         }
 438
 439         /* link the ed into a chain if is not already */
 440         if (ed->state != ED_OPER)
 441                 ep_link (ohci, ed);
 442
 443         /* fill the TDs and link it to the ed */
 444         td_submit_job(dev, pipe, buffer, transfer_len, setup, purb_priv, interval);
 445
 446         return 0;
 447 }
 448
 449 /*-------------------------------------------------------------------------*/
 450
 451 #ifdef DEBUG
 452 /* tell us the current USB frame number */
 453
 454 static int sohci_get_current_frame_number (struct usb_device *usb_dev)
 455 {
 456         ohci_t *ohci = &gohci;
 457
 458         return m16_swap (ohci->hcca->frame_no);
 459 }
 460 #endif
 461
 462 /*-------------------------------------------------------------------------*
 463  * ED handling functions
 464  *-------------------------------------------------------------------------*/
 465
 466 /* link an ed into one of the HC chains */
 467
 468 static int ep_link (ohci_t *ohci, ed_t *edi)
 469 {
 470         volatile ed_t *ed = edi;
 471
 472         ed->state = ED_OPER;
 473
 474         switch (ed->type) {
 475         case PIPE_CONTROL:
 476                 ed->hwNextED = 0;
 477                 if (ohci->ed_controltail == NULL) {
 478                         writel (ed, &ohci->regs->ed_controlhead);
 479                 } else {
 480                         ohci->ed_controltail->hwNextED = m32_swap (ed);
 481                 }
 482                 ed->ed_prev = ohci->ed_controltail;
 483                 if (!ohci->ed_controltail && !ohci->ed_rm_list[0] &&
 484                         !ohci->ed_rm_list[1] && !ohci->sleeping) {
 485                         ohci->hc_control |= OHCI_CTRL_CLE;
 486                         writel (ohci->hc_control, &ohci->regs->control);
 487                 }
 488                 ohci->ed_controltail = edi;
 489                 break;
 490
 491         case PIPE_BULK:
 492                 ed->hwNextED = 0;
 493                 if (ohci->ed_bulktail == NULL) {
 494                         writel (ed, &ohci->regs->ed_bulkhead);
 495                 } else {
 496                         ohci->ed_bulktail->hwNextED = m32_swap (ed);
 497                 }
 498                 ed->ed_prev = ohci->ed_bulktail;
 499                 if (!ohci->ed_bulktail && !ohci->ed_rm_list[0] &&
 500                         !ohci->ed_rm_list[1] && !ohci->sleeping) {
 501                         ohci->hc_control |= OHCI_CTRL_BLE;
 502                         writel (ohci->hc_control, &ohci->regs->control);
 503                 }
 504                 ohci->ed_bulktail = edi;
 505                 break;
 506         }
 507         return 0;
 508 }
 509
 510 /*-------------------------------------------------------------------------*/
 511
 512 /* unlink an ed from one of the HC chains.
 513  * just the link to the ed is unlinked.
 514  * the link from the ed still points to another operational ed or 0
 515  * so the HC can eventually finish the processing of the unlinked ed */
 516
 517 static int ep_unlink (ohci_t *ohci, ed_t *ed)
 518 {
 519         ed->hwINFO |= m32_swap (OHCI_ED_SKIP);
 520
 521         switch (ed->type) {
 522         case PIPE_CONTROL:
 523                 if (ed->ed_prev == NULL) {
 524                         if (!ed->hwNextED) {
 525                                 ohci->hc_control &= ~OHCI_CTRL_CLE;
 526                                 writel (ohci->hc_control, &ohci->regs->control);
 527                         }
 528                         writel (m32_swap (*((__u32 *)&ed->hwNextED)), &ohci->regs->ed_controlhead);
 529                 } else {
 530                         ed->ed_prev->hwNextED = ed->hwNextED;
 531                 }
 532                 if (ohci->ed_controltail == ed) {
 533                         ohci->ed_controltail = ed->ed_prev;
 534                 } else {
 535                         ((ed_t *)m32_swap (*((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
 536                 }
 537                 break;
 538
 539         case PIPE_BULK:
 540                 if (ed->ed_prev == NULL) {
 541                         if (!ed->hwNextED) {
 542                                 ohci->hc_control &= ~OHCI_CTRL_BLE;
 543                                 writel (ohci->hc_control, &ohci->regs->control);
 544                         }
 545                         writel (m32_swap (*((__u32 *)&ed->hwNextED)), &ohci->regs->ed_bulkhead);
 546                 } else {
 547                         ed->ed_prev->hwNextED = ed->hwNextED;
 548                 }
 549                 if (ohci->ed_bulktail == ed) {
 550                         ohci->ed_bulktail = ed->ed_prev;
 551                 } else {
 552                         ((ed_t *)m32_swap (*((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
 553                 }
 554                 break;
 555         }
 556         ed->state = ED_UNLINK;
 557         return 0;
 558 }
 559
 560
 561 /*-------------------------------------------------------------------------*/
 562
 563 /* add/reinit an endpoint; this should be done once at the usb_set_configuration command,
 564  * but the USB stack is a little bit stateless  so we do it at every transaction
 565  * if the state of the ed is ED_NEW then a dummy td is added and the state is changed to ED_UNLINK
 566  * in all other cases the state is left unchanged
 567  * the ed info fields are setted anyway even though most of them should not change */
 568
 569 static ed_t * ep_add_ed (struct usb_device *usb_dev, unsigned long pipe)
 570 {
 571         td_t *td;
 572         ed_t *ed_ret;
 573         volatile ed_t *ed;
 574
 575         ed = ed_ret = &ohci_dev.ed[(usb_pipeendpoint (pipe) << 1) |
 576                         (usb_pipecontrol (pipe)? 0: usb_pipeout (pipe))];
 577
 578         if ((ed->state & ED_DEL) || (ed->state & ED_URB_DEL)) {
 579                 err("ep_add_ed: pending delete");
 580                 /* pending delete request */
 581                 return NULL;
 582         }
 583
 584         if (ed->state == ED_NEW) {
 585                 ed->hwINFO = m32_swap (OHCI_ED_SKIP); /* skip ed */
 586                 /* dummy td; end of td list for ed */
 587                 td = td_alloc (usb_dev);
 588                 ed->hwTailP = m32_swap (td);
 589                 ed->hwHeadP = ed->hwTailP;
 590                 ed->state = ED_UNLINK;
 591                 ed->type = usb_pipetype (pipe);
 592                 ohci_dev.ed_cnt++;
 593         }
 594
 595         ed->hwINFO = m32_swap (usb_pipedevice (pipe)
 596                         | usb_pipeendpoint (pipe) << 7
 597                         | (usb_pipeisoc (pipe)? 0x8000: 0)
 598                         | (usb_pipecontrol (pipe)? 0: (usb_pipeout (pipe)? 0x800: 0x1000))
 599                         | usb_pipeslow (pipe) << 13
 600                         | usb_maxpacket (usb_dev, pipe) << 16);
 601
 602         return ed_ret;
 603 }
 604
 605 /*-------------------------------------------------------------------------*
 606  * TD handling functions
 607  *-------------------------------------------------------------------------*/
 608
 609 /* enqueue next TD for this URB (OHCI spec 5.2.8.2) */
 610
 611 static void td_fill (ohci_t *ohci, unsigned int info,
 612         void *data, int len,
 613         struct usb_device *dev, int index, urb_priv_t *urb_priv)
 614 {
 615         volatile td_t  *td, *td_pt;
 616 #ifdef OHCI_FILL_TRACE
 617         int i;
 618 #endif
 619
 620         if (index > urb_priv->length) {
 621                 err("index > length");
 622                 return;
 623         }
 624         /* use this td as the next dummy */
 625         td_pt = urb_priv->td [index];
 626         td_pt->hwNextTD = 0;
 627
 628         /* fill the old dummy TD */
 629         td = urb_priv->td [index] = (td_t *)(m32_swap (urb_priv->ed->hwTailP) & ~0xf);
 630
 631         td->ed = urb_priv->ed;
 632         td->next_dl_td = NULL;
 633         td->index = index;
 634         td->data = (__u32)data;
 635 #ifdef OHCI_FILL_TRACE
 636         if ((usb_pipetype(urb_priv->pipe) == PIPE_BULK) && usb_pipeout(urb_priv->pipe)) {
 637                 for (i = 0; i < len; i++)
 638                 printf("td->data[%d] %#2x ",i, ((unsigned char *)td->data)[i]);
 639                 printf("\n");
 640         }
 641 #endif
 642         if (!len)
 643                 data = 0;
 644
 645         td->hwINFO = m32_swap (info);
 646         td->hwCBP = m32_swap (data);
 647         if (data)
 648                 td->hwBE = m32_swap (data + len - 1);
 649         else
 650                 td->hwBE = 0;
 651         td->hwNextTD = m32_swap (td_pt);
 652         td->hwPSW [0] = m16_swap (((__u32)data & 0x0FFF) | 0xE000);
 653
 654         /* append to queue */
 655         td->ed->hwTailP = td->hwNextTD;
 656 }
 657
 658 /*-------------------------------------------------------------------------*/
 659
 660 /* prepare all TDs of a transfer */
 661
 662 static void td_submit_job (struct usb_device *dev, unsigned long pipe, void *buffer,
 663         int transfer_len, struct devrequest *setup, urb_priv_t *urb, int interval)
 664 {
 665         ohci_t *ohci = &gohci;
 666         int data_len = transfer_len;
 667         void *data;
 668         int cnt = 0;
 669         __u32 info = 0;
 670         unsigned int toggle = 0;
 671
 672         /* OHCI handles the DATA-toggles itself, we just use the USB-toggle bits for reseting */
 673         if(usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe))) {
 674                 toggle = TD_T_TOGGLE;
 675         } else {
 676                 toggle = TD_T_DATA0;
 677                 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 1);
 678         }
 679         urb->td_cnt = 0;
 680         if (data_len)
 681                 data = buffer;
 682         else
 683                 data = 0;
 684
 685         switch (usb_pipetype (pipe)) {
 686         case PIPE_BULK:
 687                 info = usb_pipeout (pipe)?
 688                         TD_CC | TD_DP_OUT : TD_CC | TD_DP_IN ;
 689                 while(data_len > 4096) {
 690                         td_fill (ohci, info | (cnt? TD_T_TOGGLE:toggle), data, 4096, dev, cnt, urb);
 691                         data += 4096; data_len -= 4096; cnt++;
 692                 }
 693                 info = usb_pipeout (pipe)?
 694                         TD_CC | TD_DP_OUT : TD_CC | TD_R | TD_DP_IN ;
 695                 td_fill (ohci, info | (cnt? TD_T_TOGGLE:toggle), data, data_len, dev, cnt, urb);
 696                 cnt++;
 697
 698                 if (!ohci->sleeping)
 699                         writel (OHCI_BLF, &ohci->regs->cmdstatus); /* start bulk list */
 700                 break;
 701
 702         case PIPE_CONTROL:
 703                 info = TD_CC | TD_DP_SETUP | TD_T_DATA0;
 704                 td_fill (ohci, info, setup, 8, dev, cnt++, urb);
 705                 if (data_len > 0) {
 706                         info = usb_pipeout (pipe)?
 707                                 TD_CC | TD_R | TD_DP_OUT | TD_T_DATA1 : TD_CC | TD_R | TD_DP_IN | TD_T_DATA1;
 708                         /* NOTE:  mishandles transfers >8K, some >4K */
 709                         td_fill (ohci, info, data, data_len, dev, cnt++, urb);
 710                 }
 711                 info = usb_pipeout (pipe)?
 712                         TD_CC | TD_DP_IN | TD_T_DATA1: TD_CC | TD_DP_OUT | TD_T_DATA1;
 713                 td_fill (ohci, info, data, 0, dev, cnt++, urb);
 714                 if (!ohci->sleeping)
 715                         writel (OHCI_CLF, &ohci->regs->cmdstatus); /* start Control list */
 716                 break;
 717         }
 718         if (urb->length != cnt)
 719                 dbg("TD LENGTH %d != CNT %d", urb->length, cnt);
 720 }
 721
 722 /*-------------------------------------------------------------------------*
 723  * Done List handling functions
 724  *-------------------------------------------------------------------------*/
 725
 726
 727 /* calculate the transfer length and update the urb */
 728
 729 static void dl_transfer_length(td_t * td)
 730 {
 731         __u32 tdINFO, tdBE, tdCBP;
 732         urb_priv_t *lurb_priv = &urb_priv;
 733
 734         tdINFO = m32_swap (td->hwINFO);
 735         tdBE   = m32_swap (td->hwBE);
 736         tdCBP  = m32_swap (td->hwCBP);
 737
 738
 739         if (!(usb_pipetype (lurb_priv->pipe) == PIPE_CONTROL &&
 740             ((td->index == 0) || (td->index == lurb_priv->length - 1)))) {
 741                 if (tdBE != 0) {
 742                         if (td->hwCBP == 0)
 743                                 lurb_priv->actual_length += tdBE - td->data + 1;
 744                         else
 745                                 lurb_priv->actual_length += tdCBP - td->data;
 746                 }
 747         }
 748 }
 749
 750 /*-------------------------------------------------------------------------*/
 751
 752 /* replies to the request have to be on a FIFO basis so
 753  * we reverse the reversed done-list */
 754
 755 static td_t * dl_reverse_done_list (ohci_t *ohci)
 756 {
 757         __u32 td_list_hc;
 758         td_t *td_rev = NULL;
 759         td_t *td_list = NULL;
 760         urb_priv_t *lurb_priv = NULL;
 761
 762         td_list_hc = m32_swap (ohci->hcca->done_head) & 0xfffffff0;
 763         ohci->hcca->done_head = 0;
 764
 765         while (td_list_hc) {
 766                 td_list = (td_t *)td_list_hc;
 767
 768                 if (TD_CC_GET (m32_swap (td_list->hwINFO))) {
 769                         lurb_priv = &urb_priv;
 770                         dbg(" USB-error/status: %x : %p",
 771                                         TD_CC_GET (m32_swap (td_list->hwINFO)), td_list);
 772                         if (td_list->ed->hwHeadP & m32_swap (0x1)) {
 773                                 if (lurb_priv && ((td_list->index + 1) < lurb_priv->length)) {
 774                                         td_list->ed->hwHeadP =
 775                                                 (lurb_priv->td[lurb_priv->length - 1]->hwNextTD & m32_swap (0xfffffff0)) |
 776                                                                         (td_list->ed->hwHeadP & m32_swap (0x2));
 777                                         lurb_priv->td_cnt += lurb_priv->length - td_list->index - 1;
 778                                 } else
 779                                         td_list->ed->hwHeadP &= m32_swap (0xfffffff2);
 780                         }
 781                 }
 782
 783                 td_list->next_dl_td = td_rev;
 784                 td_rev = td_list;
 785                 td_list_hc = m32_swap (td_list->hwNextTD) & 0xfffffff0;
 786         }
 787         return td_list;
 788 }
 789
 790 /*-------------------------------------------------------------------------*/
 791
 792 /* td done list */
 793 static int dl_done_list (ohci_t *ohci, td_t *td_list)
 794 {
 795         td_t *td_list_next = NULL;
 796         ed_t *ed;
 797         int cc = 0;
 798         int stat = 0;
 799         /* urb_t *urb; */
 800         urb_priv_t *lurb_priv;
 801         __u32 tdINFO, edHeadP, edTailP;
 802
 803         while (td_list) {
 804                 td_list_next = td_list->next_dl_td;
 805
 806                 lurb_priv = &urb_priv;
 807                 tdINFO = m32_swap (td_list->hwINFO);
 808
 809                 ed = td_list->ed;
 810
 811                 dl_transfer_length(td_list);
 812
 813                 /* error code of transfer */
 814                 cc = TD_CC_GET (tdINFO);
 815                 if (cc != 0) {
 816                         dbg("ConditionCode %#x", cc);
 817                         stat = cc_to_error[cc];
 818                 }
 819
 820                 if (ed->state != ED_NEW) {
 821                         edHeadP = m32_swap (ed->hwHeadP) & 0xfffffff0;
 822                         edTailP = m32_swap (ed->hwTailP);
 823
 824                         /* unlink eds if they are not busy */
 825                         if ((edHeadP == edTailP) && (ed->state == ED_OPER))
 826                                 ep_unlink (ohci, ed);
 827                 }
 828
 829                 td_list = td_list_next;
 830         }
 831         return stat;
 832 }
 833
 834 /*-------------------------------------------------------------------------*
 835  * Virtual Root Hub
 836  *-------------------------------------------------------------------------*/
 837
 838 /* Device descriptor */
 839 static __u8 root_hub_dev_des[] =
 840 {
 841         0x12,       /*  __u8  bLength; */
 842         0x01,       /*  __u8  bDescriptorType; Device */
 843         0x10,       /*  __u16 bcdUSB; v1.1 */
 844         0x01,
 845         0x09,       /*  __u8  bDeviceClass; HUB_CLASSCODE */
 846         0x00,       /*  __u8  bDeviceSubClass; */
 847         0x00,       /*  __u8  bDeviceProtocol; */
 848         0x08,       /*  __u8  bMaxPacketSize0; 8 Bytes */
 849         0x00,       /*  __u16 idVendor; */
 850         0x00,
 851         0x00,       /*  __u16 idProduct; */
 852         0x00,
 853         0x00,       /*  __u16 bcdDevice; */
 854         0x00,
 855         0x00,       /*  __u8  iManufacturer; */
 856         0x01,       /*  __u8  iProduct; */
 857         0x00,       /*  __u8  iSerialNumber; */
 858         0x01        /*  __u8  bNumConfigurations; */
 859 };
 860
 861
 862 /* Configuration descriptor */
 863 static __u8 root_hub_config_des[] =
 864 {
 865         0x09,       /*  __u8  bLength; */
 866         0x02,       /*  __u8  bDescriptorType; Configuration */
 867         0x19,       /*  __u16 wTotalLength; */
 868         0x00,
 869         0x01,       /*  __u8  bNumInterfaces; */
 870         0x01,       /*  __u8  bConfigurationValue; */
 871         0x00,       /*  __u8  iConfiguration; */
 872         0x40,       /*  __u8  bmAttributes;
 873                  Bit 7: Bus-powered, 6: Self-powered, 5 Remote-wakwup, 4..0: resvd */
 874         0x00,       /*  __u8  MaxPower; */
 875
 876         /* interface */
 877         0x09,       /*  __u8  if_bLength; */
 878         0x04,       /*  __u8  if_bDescriptorType; Interface */
 879         0x00,       /*  __u8  if_bInterfaceNumber; */
 880         0x00,       /*  __u8  if_bAlternateSetting; */
 881         0x01,       /*  __u8  if_bNumEndpoints; */
 882         0x09,       /*  __u8  if_bInterfaceClass; HUB_CLASSCODE */
 883         0x00,       /*  __u8  if_bInterfaceSubClass; */
 884         0x00,       /*  __u8  if_bInterfaceProtocol; */
 885         0x00,       /*  __u8  if_iInterface; */
 886
 887         /* endpoint */
 888         0x07,       /*  __u8  ep_bLength; */
 889         0x05,       /*  __u8  ep_bDescriptorType; Endpoint */
 890         0x81,       /*  __u8  ep_bEndpointAddress; IN Endpoint 1 */
 891         0x03,       /*  __u8  ep_bmAttributes; Interrupt */
 892         0x02,       /*  __u16 ep_wMaxPacketSize; ((MAX_ROOT_PORTS + 1) / 8 */
 893         0x00,
 894         0xff        /*  __u8  ep_bInterval; 255 ms */
 895 };
 896
 897 static unsigned char root_hub_str_index0[] =
 898 {
 899         0x04,                   /*  __u8  bLength; */
 900         0x03,                   /*  __u8  bDescriptorType; String-descriptor */
 901         0x09,                   /*  __u8  lang ID */
 902         0x04,                   /*  __u8  lang ID */
 903 };
 904
 905 static unsigned char root_hub_str_index1[] =
 906 {
 907         28,                     /*  __u8  bLength; */
 908         0x03,                   /*  __u8  bDescriptorType; String-descriptor */
 909         'O',                    /*  __u8  Unicode */
 910         0,                              /*  __u8  Unicode */
 911         'H',                    /*  __u8  Unicode */
 912         0,                              /*  __u8  Unicode */
 913         'C',                    /*  __u8  Unicode */
 914         0,                              /*  __u8  Unicode */
 915         'I',                    /*  __u8  Unicode */
 916         0,                              /*  __u8  Unicode */
 917         ' ',                    /*  __u8  Unicode */
 918         0,                              /*  __u8  Unicode */
 919         'R',                    /*  __u8  Unicode */
 920         0,                              /*  __u8  Unicode */
 921         'o',                    /*  __u8  Unicode */
 922         0,                              /*  __u8  Unicode */
 923         'o',                    /*  __u8  Unicode */
 924         0,                              /*  __u8  Unicode */
 925         't',                    /*  __u8  Unicode */
 926         0,                              /*  __u8  Unicode */
 927         ' ',                    /*  __u8  Unicode */
 928         0,                              /*  __u8  Unicode */
 929         'H',                    /*  __u8  Unicode */
 930         0,                              /*  __u8  Unicode */
 931         'u',                    /*  __u8  Unicode */
 932         0,                              /*  __u8  Unicode */
 933         'b',                    /*  __u8  Unicode */
 934         0,                              /*  __u8  Unicode */
 935 };
 936
 937 /* Hub class-specific descriptor is constructed dynamically */
 938
 939
 940 /*-------------------------------------------------------------------------*/
 941
 942 #define OK(x)                   len = (x); break
 943 #ifdef DEBUG
 944 #define WR_RH_STAT(x)           {info("WR:status %#8x", (x));writel((x), &gohci.regs->roothub.status);}
 945 #define WR_RH_PORTSTAT(x)       {info("WR:portstatus[%d] %#8x", wIndex-1, (x));writel((x), &gohci.regs->roothub.portstatus[wIndex-1]);}
 946 #else
 947 #define WR_RH_STAT(x)           writel((x), &gohci.regs->roothub.status)
 948 #define WR_RH_PORTSTAT(x)       writel((x), &gohci.regs->roothub.portstatus[wIndex-1])
 949 #endif
 950 #define RD_RH_STAT              roothub_status(&gohci)
 951 #define RD_RH_PORTSTAT          roothub_portstatus(&gohci,wIndex-1)
 952
 953 /* request to virtual root hub */
 954
 955 static int ohci_submit_rh_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 956                 int transfer_len, struct devrequest *cmd)
 957 {
 958         void * data = buffer;
 959         int leni = transfer_len;
 960         int len = 0;
 961         int stat = 0;
 962         __u32 datab[4];
 963         __u8 *data_buf = (__u8 *)datab;
 964         __u16 bmRType_bReq;
 965         __u16 wValue;
 966         __u16 wIndex;
 967         __u16 wLength;
 968
 969 #ifdef DEBUG
 970 urb_priv.actual_length = 0;
 971 pkt_print(dev, pipe, buffer, transfer_len, cmd, "SUB(rh)", usb_pipein(pipe));
 972 #else
 973         wait_ms(1);
 974 #endif
 975         if ((pipe & PIPE_INTERRUPT) == PIPE_INTERRUPT) {
 976                 info("Root-Hub submit IRQ: NOT implemented");
 977                 return 0;
 978         }
 979
 980         bmRType_bReq  = cmd->requesttype | (cmd->request << 8);
 981         wValue        = m16_swap (cmd->value);
 982         wIndex        = m16_swap (cmd->index);
 983         wLength       = m16_swap (cmd->length);
 984
 985         info("Root-Hub: adr: %2x cmd(%1x): %08x %04x %04x %04x",
 986                 dev->devnum, 8, bmRType_bReq, wValue, wIndex, wLength);
 987
 988         switch (bmRType_bReq) {
 989         /* Request Destination:
 990            without flags: Device,
 991            RH_INTERFACE: interface,
 992            RH_ENDPOINT: endpoint,
 993            RH_CLASS means HUB here,
 994            RH_OTHER | RH_CLASS  almost ever means HUB_PORT here
 995         */
 996
 997         case RH_GET_STATUS:
 998                         *(__u16 *) data_buf = m16_swap (1); OK (2);
 999         case RH_GET_STATUS | RH_INTERFACE:
1000                         *(__u16 *) data_buf = m16_swap (0); OK (2);
1001         case RH_GET_STATUS | RH_ENDPOINT:
1002                         *(__u16 *) data_buf = m16_swap (0); OK (2);
1003         case RH_GET_STATUS | RH_CLASS:
1004                         *(__u32 *) data_buf = m32_swap (
1005                                 RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE));
1006                         OK (4);
1007         case RH_GET_STATUS | RH_OTHER | RH_CLASS:
1008                         *(__u32 *) data_buf = m32_swap (RD_RH_PORTSTAT); OK (4);
1009
1010         case RH_CLEAR_FEATURE | RH_ENDPOINT:
1011                 switch (wValue) {
1012                         case (RH_ENDPOINT_STALL): OK (0);
1013                 }
1014                 break;
1015
1016         case RH_CLEAR_FEATURE | RH_CLASS:
1017                 switch (wValue) {
1018                         case RH_C_HUB_LOCAL_POWER:
1019                                 OK(0);
1020                         case (RH_C_HUB_OVER_CURRENT):
1021                                         WR_RH_STAT(RH_HS_OCIC); OK (0);
1022                 }
1023                 break;
1024
1025         case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
1026                 switch (wValue) {
1027                         case (RH_PORT_ENABLE):
1028                                         WR_RH_PORTSTAT (RH_PS_CCS ); OK (0);
1029                         case (RH_PORT_SUSPEND):
1030                                         WR_RH_PORTSTAT (RH_PS_POCI); OK (0);
1031                         case (RH_PORT_POWER):
1032                                         WR_RH_PORTSTAT (RH_PS_LSDA); OK (0);
1033                         case (RH_C_PORT_CONNECTION):
1034                                         WR_RH_PORTSTAT (RH_PS_CSC ); OK (0);
1035                         case (RH_C_PORT_ENABLE):
1036                                         WR_RH_PORTSTAT (RH_PS_PESC); OK (0);
1037                         case (RH_C_PORT_SUSPEND):
1038                                         WR_RH_PORTSTAT (RH_PS_PSSC); OK (0);
1039                         case (RH_C_PORT_OVER_CURRENT):
1040                                         WR_RH_PORTSTAT (RH_PS_OCIC); OK (0);
1041                         case (RH_C_PORT_RESET):
1042                                         WR_RH_PORTSTAT (RH_PS_PRSC); OK (0);
1043                 }
1044                 break;
1045
1046         case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
1047                 switch (wValue) {
1048                         case (RH_PORT_SUSPEND):
1049                                         WR_RH_PORTSTAT (RH_PS_PSS ); OK (0);
1050                         case (RH_PORT_RESET): /* BUG IN HUP CODE *********/
1051                                         if (RD_RH_PORTSTAT & RH_PS_CCS)
1052                                             WR_RH_PORTSTAT (RH_PS_PRS);
1053                                         OK (0);
1054                         case (RH_PORT_POWER):
1055                                         WR_RH_PORTSTAT (RH_PS_PPS ); OK (0);
1056                         case (RH_PORT_ENABLE): /* BUG IN HUP CODE *********/
1057                                         if (RD_RH_PORTSTAT & RH_PS_CCS)
1058                                             WR_RH_PORTSTAT (RH_PS_PES );
1059                                         OK (0);
1060                 }
1061                 break;
1062
1063         case RH_SET_ADDRESS: gohci.rh.devnum = wValue; OK(0);
1064
1065         case RH_GET_DESCRIPTOR:
1066                 switch ((wValue & 0xff00) >> 8) {
1067                         case (0x01): /* device descriptor */
1068                                 len = min_t(unsigned int,
1069                                           leni,
1070                                           min_t(unsigned int,
1071                                               sizeof (root_hub_dev_des),
1072                                               wLength));
1073                                 data_buf = root_hub_dev_des; OK(len);
1074                         case (0x02): /* configuration descriptor */
1075                                 len = min_t(unsigned int,
1076                                           leni,
1077                                           min_t(unsigned int,
1078                                               sizeof (root_hub_config_des),
1079                                               wLength));
1080                                 data_buf = root_hub_config_des; OK(len);
1081                         case (0x03): /* string descriptors */
1082                                 if(wValue==0x0300) {
1083                                         len = min_t(unsigned int,
1084                                                   leni,
1085                                                   min_t(unsigned int,
1086                                                       sizeof (root_hub_str_index0),
1087                                                       wLength));
1088                                         data_buf = root_hub_str_index0;
1089                                         OK(len);
1090                                 }
1091                                 if(wValue==0x0301) {
1092                                         len = min_t(unsigned int,
1093                                                   leni,
1094                                                   min_t(unsigned int,
1095                                                       sizeof (root_hub_str_index1),
1096                                                       wLength));
1097                                         data_buf = root_hub_str_index1;
1098                                         OK(len);
1099                         }
1100                         default:
1101                                 stat = USB_ST_STALLED;
1102                 }
1103                 break;
1104
1105         case RH_GET_DESCRIPTOR | RH_CLASS:
1106             {
1107                     __u32 temp = roothub_a (&gohci);
1108
1109                     data_buf [0] = 9;           /* min length; */
1110                     data_buf [1] = 0x29;
1111                     data_buf [2] = temp & RH_A_NDP;
1112                     data_buf [3] = 0;
1113                     if (temp & RH_A_PSM)        /* per-port power switching? */
1114                         data_buf [3] |= 0x1;
1115                     if (temp & RH_A_NOCP)       /* no overcurrent reporting? */
1116                         data_buf [3] |= 0x10;
1117                     else if (temp & RH_A_OCPM)  /* per-port overcurrent reporting? */
1118                         data_buf [3] |= 0x8;
1119
1120                     /* corresponds to data_buf[4-7] */
1121                     datab [1] = 0;
1122                     data_buf [5] = (temp & RH_A_POTPGT) >> 24;
1123                     temp = roothub_b (&gohci);
1124                     data_buf [7] = temp & RH_B_DR;
1125                     if (data_buf [2] < 7) {
1126                         data_buf [8] = 0xff;
1127                     } else {
1128                         data_buf [0] += 2;
1129                         data_buf [8] = (temp & RH_B_DR) >> 8;
1130                         data_buf [10] = data_buf [9] = 0xff;
1131                     }
1132
1133                     len = min_t(unsigned int, leni,
1134                               min_t(unsigned int, data_buf [0], wLength));
1135                     OK (len);
1136                 }
1137
1138         case RH_GET_CONFIGURATION:      *(__u8 *) data_buf = 0x01; OK (1);
1139
1140         case RH_SET_CONFIGURATION:      WR_RH_STAT (0x10000); OK (0);
1141
1142         default:
1143                 dbg ("unsupported root hub command");
1144                 stat = USB_ST_STALLED;
1145         }
1146
1147 #ifdef  DEBUG
1148         ohci_dump_roothub (&gohci, 1);
1149 #else
1150         wait_ms(1);
1151 #endif
1152
1153         len = min_t(int, len, leni);
1154         if (data != data_buf)
1155             memcpy (data, data_buf, len);
1156         dev->act_len = len;
1157         dev->status = stat;
1158
1159 #ifdef DEBUG
1160         if (transfer_len)
1161                 urb_priv.actual_length = transfer_len;
1162         pkt_print(dev, pipe, buffer, transfer_len, cmd, "RET(rh)", 0/*usb_pipein(pipe)*/);
1163 #else
1164         wait_ms(1);
1165 #endif
1166
1167         return stat;
1168 }
1169
1170 /*-------------------------------------------------------------------------*/
1171
1172 /* common code for handling submit messages - used for all but root hub */
1173 /* accesses. */
1174 int submit_common_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1175                 int transfer_len, struct devrequest *setup, int interval)
1176 {
1177         int stat = 0;
1178         int maxsize = usb_maxpacket(dev, pipe);
1179         int timeout;
1180
1181 #ifdef DEBUG
1182         urb_priv.actual_length = 0;
1183         pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB", usb_pipein(pipe));
1184 #else
1185         wait_ms(1);
1186 #endif
1187         if (!maxsize) {
1188                 err("submit_common_message: pipesize for pipe %lx is zero",
1189                         pipe);
1190                 return -1;
1191         }
1192
1193         if (sohci_submit_job(dev, pipe, buffer, transfer_len, setup, interval) < 0) {
1194                 err("sohci_submit_job failed");
1195                 return -1;
1196         }
1197
1198         wait_ms(10);
1199         /* ohci_dump_status(&gohci); */
1200
1201         /* allow more time for a BULK device to react - some are slow */
1202 #define BULK_TO  5000   /* timeout in milliseconds */
1203         if (usb_pipetype (pipe) == PIPE_BULK)
1204                 timeout = BULK_TO;
1205         else
1206                 timeout = 100;
1207
1208         /* wait for it to complete */
1209         for (;;) {
1210                 /* check whether the controller is done */
1211                 stat = hc_interrupt();
1212                 if (stat < 0) {
1213                         stat = 1;
1214                         break;
1215                 }
1216                 if (stat >= 0 && stat != 0xff) {
1217                         /* 0xff is returned for an SF-interrupt */
1218                         break;
1219                 }
1220                 if (--timeout) {
1221                         wait_ms(1);
1222                 } else {
1223                         err("CTL:TIMEOUT");
1224                         stat = 1;
1225                         break;
1226                 }
1227         }
1228         dev->status = stat;
1229         dev->act_len = transfer_len;
1230
1231 #ifdef DEBUG
1232         pkt_print(dev, pipe, buffer, transfer_len, setup, "RET(ctlr)", usb_pipein(pipe));
1233 #else
1234         wait_ms(1);
1235 #endif
1236
1237         /* free TDs in urb_priv */
1238         urb_free_priv (&urb_priv);
1239         return 0;
1240 }
1241
1242 /* submit routines called from usb.c */
1243 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1244                 int transfer_len)
1245 {
1246         info("submit_bulk_msg");
1247         return submit_common_msg(dev, pipe, buffer, transfer_len, NULL, 0);
1248 }
1249
1250 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1251                 int transfer_len, struct devrequest *setup)
1252 {
1253         int maxsize = usb_maxpacket(dev, pipe);
1254
1255         info("submit_control_msg");
1256 #ifdef DEBUG
1257         urb_priv.actual_length = 0;
1258         pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB", usb_pipein(pipe));
1259 #else
1260         wait_ms(1);
1261 #endif
1262         if (!maxsize) {
1263                 err("submit_control_message: pipesize for pipe %lx is zero",
1264                         pipe);
1265                 return -1;
1266         }
1267         if (((pipe >> 8) & 0x7f) == gohci.rh.devnum)
1268                 /* root hub - redirect */
1269                 return ohci_submit_rh_msg(dev, pipe, buffer, transfer_len,
1270                         setup);
1271
1272         return submit_common_msg(dev, pipe, buffer, transfer_len, setup, 0);
1273 }
1274
1275 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1276                 int transfer_len, int interval)
1277 {
1278         info("submit_int_msg");
1279         return -1;
1280 }
1281
1282 /*-------------------------------------------------------------------------*
1283  * HC functions
1284  *-------------------------------------------------------------------------*/
1285
1286 /* reset the HC and BUS */
1287
1288 static int hc_reset (ohci_t *ohci)
1289 {
1290         int timeout = 30;
1291         int smm_timeout = 50; /* 0,5 sec */
1292
1293         if (readl (&ohci->regs->control) & OHCI_CTRL_IR) { /* SMM owns the HC */
1294                 writel (OHCI_OCR, &ohci->regs->cmdstatus); /* request ownership */
1295                 info("USB HC TakeOver from SMM");
1296                 while (readl (&ohci->regs->control) & OHCI_CTRL_IR) {
1297                         wait_ms (10);
1298                         if (--smm_timeout == 0) {
1299                                 err("USB HC TakeOver failed!");
1300                                 return -1;
1301                         }
1302                 }
1303         }
1304
1305         /* Disable HC interrupts */
1306         writel (OHCI_INTR_MIE, &ohci->regs->intrdisable);
1307
1308         dbg("USB HC reset_hc usb-%s: ctrl = 0x%X ;",
1309                 ohci->slot_name,
1310                 readl (&ohci->regs->control));
1311
1312         /* Reset USB (needed by some controllers) */
1313         writel (0, &ohci->regs->control);
1314
1315         /* HC Reset requires max 10 us delay */
1316         writel (OHCI_HCR,  &ohci->regs->cmdstatus);
1317         while ((readl (&ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
1318                 if (--timeout == 0) {
1319                         err("USB HC reset timed out!");
1320                         return -1;
1321                 }
1322                 udelay (1);
1323         }
1324         return 0;
1325 }
1326
1327 /*-------------------------------------------------------------------------*/
1328
1329 /* Start an OHCI controller, set the BUS operational
1330  * enable interrupts
1331  * connect the virtual root hub */
1332
1333 static int hc_start (ohci_t * ohci)
1334 {
1335         __u32 mask;
1336         unsigned int fminterval;
1337
1338         ohci->disabled = 1;
1339
1340         /* Tell the controller where the control and bulk lists are
1341          * The lists are empty now. */
1342
1343         writel (0, &ohci->regs->ed_controlhead);
1344         writel (0, &ohci->regs->ed_bulkhead);
1345
1346         writel ((__u32)ohci->hcca, &ohci->regs->hcca); /* a reset clears this */
1347
1348         fminterval = 0x2edf;
1349         writel ((fminterval * 9) / 10, &ohci->regs->periodicstart);
1350         fminterval |= ((((fminterval - 210) * 6) / 7) << 16);
1351         writel (fminterval, &ohci->regs->fminterval);
1352         writel (0x628, &ohci->regs->lsthresh);
1353
1354         /* start controller operations */
1355         ohci->hc_control = OHCI_CONTROL_INIT | OHCI_USB_OPER;
1356         ohci->disabled = 0;
1357         writel (ohci->hc_control, &ohci->regs->control);
1358
1359         /* Choose the interrupts we care about now, others later on demand */
1360         mask = OHCI_INTR_MIE | OHCI_INTR_UE | OHCI_INTR_WDH | OHCI_INTR_SO;
1361         writel (mask, &ohci->regs->intrstatus);
1362
1363 #ifdef  OHCI_USE_NPS
1364         /* required for AMD-756 and some Mac platforms */
1365         writel ((roothub_a (ohci) | RH_A_NPS) & ~RH_A_PSM,
1366                 &ohci->regs->roothub.a);
1367         writel (RH_HS_LPSC, &ohci->regs->roothub.status);
1368 #endif  /* OHCI_USE_NPS */
1369
1370 #define mdelay(n) ({unsigned long msec=(n); while (msec--) udelay(1000);})
1371         /* POTPGT delay is bits 24-31, in 2 ms units. */
1372         mdelay ((roothub_a (ohci) >> 23) & 0x1fe);
1373
1374         /* connect the virtual root hub */
1375         ohci->rh.devnum = 0;
1376
1377         return 0;
1378 }
1379
1380 /*-------------------------------------------------------------------------*/
1381
1382 /* an interrupt happens */
1383
1384 static int
1385 hc_interrupt (void)
1386 {
1387         ohci_t *ohci = &gohci;
1388         struct ohci_regs *regs = ohci->regs;
1389         int ints;
1390         int stat = -1;
1391
1392         if ((ohci->hcca->done_head != 0) && !(m32_swap (ohci->hcca->done_head) & 0x01)) {
1393                 ints =  OHCI_INTR_WDH;
1394         } else {
1395                 ints = readl (&regs->intrstatus);
1396         }
1397
1398         /* dbg("Interrupt: %x frame: %x", ints, le16_to_cpu (ohci->hcca->frame_no)); */
1399
1400         if (ints & OHCI_INTR_UE) {
1401                 ohci->disabled++;
1402                 err ("OHCI Unrecoverable Error, controller usb-%s disabled",
1403                         ohci->slot_name);
1404                 /* e.g. due to PCI Master/Target Abort */
1405
1406 #ifdef  DEBUG
1407                 ohci_dump (ohci, 1);
1408 #else
1409         wait_ms(1);
1410 #endif
1411                 /* FIXME: be optimistic, hope that bug won't repeat often. */
1412                 /* Make some non-interrupt context restart the controller. */
1413                 /* Count and limit the retries though; either hardware or */
1414                 /* software errors can go forever... */
1415                 hc_reset (ohci);
1416                 return -1;
1417         }
1418
1419         if (ints & OHCI_INTR_WDH) {
1420                 wait_ms(1);
1421                 writel (OHCI_INTR_WDH, &regs->intrdisable);
1422                 stat = dl_done_list (&gohci, dl_reverse_done_list (&gohci));
1423                 writel (OHCI_INTR_WDH, &regs->intrenable);
1424         }
1425
1426         if (ints & OHCI_INTR_SO) {
1427                 dbg("USB Schedule overrun\n");
1428                 writel (OHCI_INTR_SO, &regs->intrenable);
1429                 stat = -1;
1430         }
1431
1432         /* FIXME:  this assumes SOF (1/ms) interrupts don't get lost... */
1433         if (ints & OHCI_INTR_SF) {
1434                 unsigned int frame = m16_swap (ohci->hcca->frame_no) & 1;
1435                 wait_ms(1);
1436                 writel (OHCI_INTR_SF, &regs->intrdisable);
1437                 if (ohci->ed_rm_list[frame] != NULL)
1438                         writel (OHCI_INTR_SF, &regs->intrenable);
1439                 stat = 0xff;
1440         }
1441
1442         writel (ints, &regs->intrstatus);
1443         return stat;
1444 }
1445
1446 /*-------------------------------------------------------------------------*/
1447
1448 /*-------------------------------------------------------------------------*/
1449
1450 /* De-allocate all resources.. */
1451
1452 static void hc_release_ohci (ohci_t *ohci)
1453 {
1454         dbg ("USB HC release ohci usb-%s", ohci->slot_name);
1455
1456         if (!ohci->disabled)
1457                 hc_reset (ohci);
1458 }
1459
1460 /*-------------------------------------------------------------------------*/
1461
1462 /*
1463  * low level initalisation routine, called from usb.c
1464  */
1465 static char ohci_inited = 0;
1466
1467 int usb_lowlevel_init(void)
1468 {
1469         S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();
1470         S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();
1471
1472         /*
1473          * Set the 48 MHz UPLL clocking. Values are taken from
1474          * "PLL value selection guide", 6-23, s3c2400_UM.pdf.
1475          */
1476         clk_power->UPLLCON = ((40 << 12) + (1 << 4) + 2);
1477         gpio->MISCCR |= 0x8; /* 1 = use pads related USB for USB host */
1478
1479         /*
1480          * Enable USB host clock.
1481          */
1482         clk_power->CLKCON |= (1 << 4);
1483
1484         memset (&gohci, 0, sizeof (ohci_t));
1485         memset (&urb_priv, 0, sizeof (urb_priv_t));
1486
1487         /* align the storage */
1488         if ((__u32)&ghcca[0] & 0xff) {
1489                 err("HCCA not aligned!!");
1490                 return -1;
1491         }
1492         phcca = &ghcca[0];
1493         info("aligned ghcca %p", phcca);
1494         memset(&ohci_dev, 0, sizeof(struct ohci_device));
1495         if ((__u32)&ohci_dev.ed[0] & 0x7) {
1496                 err("EDs not aligned!!");
1497                 return -1;
1498         }
1499         memset(gtd, 0, sizeof(td_t) * (NUM_TD + 1));
1500         if ((__u32)gtd & 0x7) {
1501                 err("TDs not aligned!!");
1502                 return -1;
1503         }
1504         ptd = gtd;
1505         gohci.hcca = phcca;
1506         memset (phcca, 0, sizeof (struct ohci_hcca));
1507
1508         gohci.disabled = 1;
1509         gohci.sleeping = 0;
1510         gohci.irq = -1;
1511         gohci.regs = (struct ohci_regs *)S3C24X0_USB_HOST_BASE;
1512
1513         gohci.flags = 0;
1514         gohci.slot_name = "s3c2400";
1515
1516         if (hc_reset (&gohci) < 0) {
1517                 hc_release_ohci (&gohci);
1518                 /* Initialization failed */
1519                 clk_power->CLKCON &= ~(1 << 4);
1520                 return -1;
1521         }
1522
1523         /* FIXME this is a second HC reset; why?? */
1524         writel (gohci.hc_control = OHCI_USB_RESET, &gohci.regs->control);
1525         wait_ms (10);
1526
1527         if (hc_start (&gohci) < 0) {
1528                 err ("can't start usb-%s", gohci.slot_name);
1529                 hc_release_ohci (&gohci);
1530                 /* Initialization failed */
1531                 clk_power->CLKCON &= ~(1 << 4);
1532                 return -1;
1533         }
1534
1535 #ifdef  DEBUG
1536         ohci_dump (&gohci, 1);
1537 #else
1538         wait_ms(1);
1539 #endif
1540         ohci_inited = 1;
1541         return 0;
1542 }
1543
1544 int usb_lowlevel_stop(void)
1545 {
1546         S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();
1547
1548         /* this gets called really early - before the controller has */
1549         /* even been initialized! */
1550         if (!ohci_inited)
1551                 return 0;
1552         /* TODO release any interrupts, etc. */
1553         /* call hc_release_ohci() here ? */
1554         hc_reset (&gohci);
1555         /* may not want to do this */
1556         clk_power->CLKCON &= ~(1 << 4);
1557         return 0;
1558 }
1559
1560 #endif /* CONFIG_USB_OHCI */