cpu/arm920t/s3c24x0/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  * Note: Much of this code has been derived from Linux 2.4
   8  * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
   9  * (C) Copyright 2000-2002 David Brownell
  10  *
  11  * See file CREDITS for list of people who contributed to this
  12  * project.
  13  *
  14  * This program is free software; you can redistribute it and/or
  15  * modify it under the terms of the GNU General Public License as
  16  * published by the Free Software Foundation; either version 2 of
  17  * the License, or (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with this program; if not, write to the Free Software
  26  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  27  * MA 02111-1307 USA
  28  *
  29  */
  30 /*
  31  * IMPORTANT NOTES
  32  * 1 - you MUST define LITTLEENDIAN in the configuration file for the
  33  *     board or this driver will NOT work!
  34  * 2 - this driver is intended for use with USB Mass Storage Devices
  35  *     (BBB) ONLY. There is NO support for Interrupt or Isochronous pipes!
  36  */
  37
  38 #include <common.h>
  39 /* #include <pci.h> no PCI on the S3C24X0 */
  40
  41 #ifdef CONFIG_USB_OHCI
  42
  43 #if defined(CONFIG_S3C2400)
  44 #include <s3c2400.h>
  45 #elif defined(CONFIG_S3C2410)
  46 #include <s3c2410.h>
  47 #endif
  48
  49 #include <malloc.h>
  50 #include <usb.h>
  51 #include "usb_ohci.h"
  52
  53 #define OHCI_USE_NPS            /* force NoPowerSwitching mode */
  54 #undef OHCI_VERBOSE_DEBUG       /* not always helpful */
  55
  56
  57 /* For initializing controller (mask in an HCFS mode too) */
  58 #define OHCI_CONTROL_INIT \
  59         (OHCI_CTRL_CBSR & 0x3) | OHCI_CTRL_IE | OHCI_CTRL_PLE
  60
  61 #define readl(a) (*((vu_long *)(a)))
  62 #define writel(a, b) (*((vu_long *)(b)) = ((vu_long)a))
  63
  64 #define min_t(type,x,y) ({ type __x = (x); type __y = (y); __x < __y ? __x: __y; })
  65
  66 #undef DEBUG
  67 #ifdef DEBUG
  68 #define dbg(format, arg...) printf("DEBUG: " format "\n", ## arg)
  69 #else
  70 #define dbg(format, arg...) do {} while(0)
  71 #endif /* DEBUG */
  72 #define err(format, arg...) printf("ERROR: " format "\n", ## arg)
  73 #undef SHOW_INFO
  74 #ifdef SHOW_INFO
  75 #define info(format, arg...) printf("INFO: " format "\n", ## arg)
  76 #else
  77 #define info(format, arg...) do {} while(0)
  78 #endif
  79
  80 #define m16_swap(x) swap_16(x)
  81 #define m32_swap(x) swap_32(x)
  82
  83 /* global ohci_t */
  84 static ohci_t gohci;
  85 /* this must be aligned to a 256 byte boundary */
  86 struct ohci_hcca ghcca[1];
  87 /* a pointer to the aligned storage */
  88 struct ohci_hcca *phcca;
  89 /* this allocates EDs for all possible endpoints */
  90 struct ohci_device ohci_dev;
  91 /* urb_priv */
  92 urb_priv_t urb_priv;
  93 /* RHSC flag */
  94 int got_rhsc;
  95 /* device which was disconnected */
  96 struct usb_device *devgone;
  97 /* flag guarding URB transation */
  98 int urb_finished = 0;
  99
 100 /*-------------------------------------------------------------------------*/
 101
 102 /* AMD-756 (D2 rev) reports corrupt register contents in some cases.
 103  * The erratum (#4) description is incorrect.  AMD's workaround waits
 104  * till some bits (mostly reserved) are clear; ok for all revs.
 105  */
 106 #define OHCI_QUIRK_AMD756 0xabcd
 107 #define read_roothub(hc, register, mask) ({ \
 108         u32 temp = readl (&hc->regs->roothub.register); \
 109         if (hc->flags & OHCI_QUIRK_AMD756) \
 110                 while (temp & mask) \
 111                         temp = readl (&hc->regs->roothub.register); \
 112         temp; })
 113
 114 static u32 roothub_a (struct ohci *hc)
 115         { return read_roothub (hc, a, 0xfc0fe000); }
 116 static inline u32 roothub_b (struct ohci *hc)
 117         { return readl (&hc->regs->roothub.b); }
 118 static inline u32 roothub_status (struct ohci *hc)
 119         { return readl (&hc->regs->roothub.status); }
 120 static u32 roothub_portstatus (struct ohci *hc, int i)
 121         { return read_roothub (hc, portstatus [i], 0xffe0fce0); }
 122
 123
 124 /* forward declaration */
 125 static int hc_interrupt (void);
 126 static void
 127 td_submit_job (struct usb_device * dev, unsigned long pipe, void * buffer,
 128         int transfer_len, struct devrequest * setup, urb_priv_t * urb, int interval);
 129
 130 /*-------------------------------------------------------------------------*
 131  * URB support functions
 132  *-------------------------------------------------------------------------*/
 133
 134 /* free HCD-private data associated with this URB */
 135
 136 static void urb_free_priv (urb_priv_t * urb)
 137 {
 138         int             i;
 139         int             last;
 140         struct td       * td;
 141
 142         last = urb->length - 1;
 143         if (last >= 0) {
 144                 for (i = 0; i <= last; i++) {
 145                         td = urb->td[i];
 146                         if (td) {
 147                                 td->usb_dev = NULL;
 148                                 urb->td[i] = NULL;
 149                         }
 150                 }
 151         }
 152 }
 153
 154 /*-------------------------------------------------------------------------*/
 155
 156 #ifdef DEBUG
 157 static int sohci_get_current_frame_number (struct usb_device * dev);
 158
 159 /* debug| print the main components of an URB
 160  * small: 0) header + data packets 1) just header */
 161
 162 static void pkt_print (struct usb_device * dev, unsigned long pipe, void * buffer,
 163         int transfer_len, struct devrequest * setup, char * str, int small)
 164 {
 165         urb_priv_t * purb = &urb_priv;
 166
 167         dbg("%s URB:[%4x] dev:%2d,ep:%2d-%c,type:%s,len:%d/%d stat:%#lx",
 168                         str,
 169                         sohci_get_current_frame_number (dev),
 170                         usb_pipedevice (pipe),
 171                         usb_pipeendpoint (pipe),
 172                         usb_pipeout (pipe)? 'O': 'I',
 173                         usb_pipetype (pipe) < 2? (usb_pipeint (pipe)? "INTR": "ISOC"):
 174                                 (usb_pipecontrol (pipe)? "CTRL": "BULK"),
 175                         purb->actual_length,
 176                         transfer_len, dev->status);
 177 #ifdef  OHCI_VERBOSE_DEBUG
 178         if (!small) {
 179                 int i, len;
 180
 181                 if (usb_pipecontrol (pipe)) {
 182                         printf (__FILE__ ": cmd(8):");
 183                         for (i = 0; i < 8 ; i++)
 184                                 printf (" %02x", ((__u8 *) setup) [i]);
 185                         printf ("\n");
 186                 }
 187                 if (transfer_len > 0 && buffer) {
 188                         printf (__FILE__ ": data(%d/%d):",
 189                                 purb->actual_length,
 190                                 transfer_len);
 191                         len = usb_pipeout (pipe)?
 192                                         transfer_len: purb->actual_length;
 193                         for (i = 0; i < 16 && i < len; i++)
 194                                 printf (" %02x", ((__u8 *) buffer) [i]);
 195                         printf ("%s\n", i < len? "...": "");
 196                 }
 197         }
 198 #endif
 199 }
 200
 201 /* just for debugging; prints non-empty branches of the int ed tree inclusive iso eds*/
 202 void ep_print_int_eds (ohci_t *ohci, char * str) {
 203         int i, j;
 204          __u32 * ed_p;
 205         for (i= 0; i < 32; i++) {
 206                 j = 5;
 207                 ed_p = &(ohci->hcca->int_table [i]);
 208                 if (*ed_p == 0)
 209                     continue;
 210                 printf (__FILE__ ": %s branch int %2d(%2x):", str, i, i);
 211                 while (*ed_p != 0 && j--) {
 212                         ed_t *ed = (ed_t *)m32_swap(ed_p);
 213                         printf (" ed: %4x;", ed->hwINFO);
 214                         ed_p = &ed->hwNextED;
 215                 }
 216                 printf ("\n");
 217         }
 218 }
 219
 220 static void ohci_dump_intr_mask (char *label, __u32 mask)
 221 {
 222         dbg ("%s: 0x%08x%s%s%s%s%s%s%s%s%s",
 223                 label,
 224                 mask,
 225                 (mask & OHCI_INTR_MIE) ? " MIE" : "",
 226                 (mask & OHCI_INTR_OC) ? " OC" : "",
 227                 (mask & OHCI_INTR_RHSC) ? " RHSC" : "",
 228                 (mask & OHCI_INTR_FNO) ? " FNO" : "",
 229                 (mask & OHCI_INTR_UE) ? " UE" : "",
 230                 (mask & OHCI_INTR_RD) ? " RD" : "",
 231                 (mask & OHCI_INTR_SF) ? " SF" : "",
 232                 (mask & OHCI_INTR_WDH) ? " WDH" : "",
 233                 (mask & OHCI_INTR_SO) ? " SO" : ""
 234                 );
 235 }
 236
 237 static void maybe_print_eds (char *label, __u32 value)
 238 {
 239         ed_t *edp = (ed_t *)value;
 240
 241         if (value) {
 242                 dbg ("%s %08x", label, value);
 243                 dbg ("%08x", edp->hwINFO);
 244                 dbg ("%08x", edp->hwTailP);
 245                 dbg ("%08x", edp->hwHeadP);
 246                 dbg ("%08x", edp->hwNextED);
 247         }
 248 }
 249
 250 static char * hcfs2string (int state)
 251 {
 252         switch (state) {
 253                 case OHCI_USB_RESET:    return "reset";
 254                 case OHCI_USB_RESUME:   return "resume";
 255                 case OHCI_USB_OPER:     return "operational";
 256                 case OHCI_USB_SUSPEND:  return "suspend";
 257         }
 258         return "?";
 259 }
 260
 261 /* dump control and status registers */
 262 static void ohci_dump_status (ohci_t *controller)
 263 {
 264         struct ohci_regs        *regs = controller->regs;
 265         __u32                   temp;
 266
 267         temp = readl (&regs->revision) & 0xff;
 268         if (temp != 0x10)
 269                 dbg ("spec %d.%d", (temp >> 4), (temp & 0x0f));
 270
 271         temp = readl (&regs->control);
 272         dbg ("control: 0x%08x%s%s%s HCFS=%s%s%s%s%s CBSR=%d", temp,
 273                 (temp & OHCI_CTRL_RWE) ? " RWE" : "",
 274                 (temp & OHCI_CTRL_RWC) ? " RWC" : "",
 275                 (temp & OHCI_CTRL_IR) ? " IR" : "",
 276                 hcfs2string (temp & OHCI_CTRL_HCFS),
 277                 (temp & OHCI_CTRL_BLE) ? " BLE" : "",
 278                 (temp & OHCI_CTRL_CLE) ? " CLE" : "",
 279                 (temp & OHCI_CTRL_IE) ? " IE" : "",
 280                 (temp & OHCI_CTRL_PLE) ? " PLE" : "",
 281                 temp & OHCI_CTRL_CBSR
 282                 );
 283
 284         temp = readl (&regs->cmdstatus);
 285         dbg ("cmdstatus: 0x%08x SOC=%d%s%s%s%s", temp,
 286                 (temp & OHCI_SOC) >> 16,
 287                 (temp & OHCI_OCR) ? " OCR" : "",
 288                 (temp & OHCI_BLF) ? " BLF" : "",
 289                 (temp & OHCI_CLF) ? " CLF" : "",
 290                 (temp & OHCI_HCR) ? " HCR" : ""
 291                 );
 292
 293         ohci_dump_intr_mask ("intrstatus", readl (&regs->intrstatus));
 294         ohci_dump_intr_mask ("intrenable", readl (&regs->intrenable));
 295
 296         maybe_print_eds ("ed_periodcurrent", readl (&regs->ed_periodcurrent));
 297
 298         maybe_print_eds ("ed_controlhead", readl (&regs->ed_controlhead));
 299         maybe_print_eds ("ed_controlcurrent", readl (&regs->ed_controlcurrent));
 300
 301         maybe_print_eds ("ed_bulkhead", readl (&regs->ed_bulkhead));
 302         maybe_print_eds ("ed_bulkcurrent", readl (&regs->ed_bulkcurrent));
 303
 304         maybe_print_eds ("donehead", readl (&regs->donehead));
 305 }
 306
 307 static void ohci_dump_roothub (ohci_t *controller, int verbose)
 308 {
 309         __u32                   temp, ndp, i;
 310
 311         temp = roothub_a (controller);
 312         ndp = (temp & RH_A_NDP);
 313
 314         if (verbose) {
 315                 dbg ("roothub.a: %08x POTPGT=%d%s%s%s%s%s NDP=%d", temp,
 316                         ((temp & RH_A_POTPGT) >> 24) & 0xff,
 317                         (temp & RH_A_NOCP) ? " NOCP" : "",
 318                         (temp & RH_A_OCPM) ? " OCPM" : "",
 319                         (temp & RH_A_DT) ? " DT" : "",
 320                         (temp & RH_A_NPS) ? " NPS" : "",
 321                         (temp & RH_A_PSM) ? " PSM" : "",
 322                         ndp
 323                         );
 324                 temp = roothub_b (controller);
 325                 dbg ("roothub.b: %08x PPCM=%04x DR=%04x",
 326                         temp,
 327                         (temp & RH_B_PPCM) >> 16,
 328                         (temp & RH_B_DR)
 329                         );
 330                 temp = roothub_status (controller);
 331                 dbg ("roothub.status: %08x%s%s%s%s%s%s",
 332                         temp,
 333                         (temp & RH_HS_CRWE) ? " CRWE" : "",
 334                         (temp & RH_HS_OCIC) ? " OCIC" : "",
 335                         (temp & RH_HS_LPSC) ? " LPSC" : "",
 336                         (temp & RH_HS_DRWE) ? " DRWE" : "",
 337                         (temp & RH_HS_OCI) ? " OCI" : "",
 338                         (temp & RH_HS_LPS) ? " LPS" : ""
 339                         );
 340         }
 341
 342         for (i = 0; i < ndp; i++) {
 343                 temp = roothub_portstatus (controller, i);
 344                 dbg ("roothub.portstatus [%d] = 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s",
 345                         i,
 346                         temp,
 347                         (temp & RH_PS_PRSC) ? " PRSC" : "",
 348                         (temp & RH_PS_OCIC) ? " OCIC" : "",
 349                         (temp & RH_PS_PSSC) ? " PSSC" : "",
 350                         (temp & RH_PS_PESC) ? " PESC" : "",
 351                         (temp & RH_PS_CSC) ? " CSC" : "",
 352
 353                         (temp & RH_PS_LSDA) ? " LSDA" : "",
 354                         (temp & RH_PS_PPS) ? " PPS" : "",
 355                         (temp & RH_PS_PRS) ? " PRS" : "",
 356                         (temp & RH_PS_POCI) ? " POCI" : "",
 357                         (temp & RH_PS_PSS) ? " PSS" : "",
 358
 359                         (temp & RH_PS_PES) ? " PES" : "",
 360                         (temp & RH_PS_CCS) ? " CCS" : ""
 361                         );
 362         }
 363 }
 364
 365 static void ohci_dump (ohci_t *controller, int verbose)
 366 {
 367         dbg ("OHCI controller usb-%s state", controller->slot_name);
 368
 369         /* dumps some of the state we know about */
 370         ohci_dump_status (controller);
 371         if (verbose)
 372                 ep_print_int_eds (controller, "hcca");
 373         dbg ("hcca frame #%04x", controller->hcca->frame_no);
 374         ohci_dump_roothub (controller, 1);
 375 }
 376
 377
 378 #endif /* DEBUG */
 379
 380 /*-------------------------------------------------------------------------*
 381  * Interface functions (URB)
 382  *-------------------------------------------------------------------------*/
 383
 384 /* get a transfer request */
 385
 386 int sohci_submit_job(struct usb_device *dev, unsigned long pipe, void *buffer,
 387                 int transfer_len, struct devrequest *setup, int interval)
 388 {
 389         ohci_t *ohci;
 390         ed_t * ed;
 391         urb_priv_t *purb_priv;
 392         int i, size = 0;
 393
 394         ohci = &gohci;
 395
 396         /* when controller's hung, permit only roothub cleanup attempts
 397          * such as powering down ports */
 398         if (ohci->disabled) {
 399                 err("sohci_submit_job: EPIPE");
 400                 return -1;
 401         }
 402
 403         /* if we have an unfinished URB from previous transaction let's
 404          * fail and scream as quickly as possible so as not to corrupt
 405          * further communication */
 406         if (!urb_finished) {
 407                 err("sohci_submit_job: URB NOT FINISHED");
 408                 return -1;
 409         }
 410         /* we're about to begin a new transaction here so mark the URB unfinished */
 411         urb_finished = 0;
 412
 413         /* every endpoint has a ed, locate and fill it */
 414         if (!(ed = ep_add_ed (dev, pipe))) {
 415                 err("sohci_submit_job: ENOMEM");
 416                 return -1;
 417         }
 418
 419         /* for the private part of the URB we need the number of TDs (size) */
 420         switch (usb_pipetype (pipe)) {
 421                 case PIPE_BULK: /* one TD for every 4096 Byte */
 422                         size = (transfer_len - 1) / 4096 + 1;
 423                         break;
 424                 case PIPE_CONTROL: /* 1 TD for setup, 1 for ACK and 1 for every 4096 B */
 425                         size = (transfer_len == 0)? 2:
 426                                                 (transfer_len - 1) / 4096 + 3;
 427                         break;
 428         }
 429
 430         if (size >= (N_URB_TD - 1)) {
 431                 err("need %d TDs, only have %d", size, N_URB_TD);
 432                 return -1;
 433         }
 434         purb_priv = &urb_priv;
 435         purb_priv->pipe = pipe;
 436
 437         /* fill the private part of the URB */
 438         purb_priv->length = size;
 439         purb_priv->ed = ed;
 440         purb_priv->actual_length = 0;
 441
 442         /* allocate the TDs */
 443         /* note that td[0] was allocated in ep_add_ed */
 444         for (i = 0; i < size; i++) {
 445                 purb_priv->td[i] = td_alloc (dev);
 446                 if (!purb_priv->td[i]) {
 447                         purb_priv->length = i;
 448                         urb_free_priv (purb_priv);
 449                         err("sohci_submit_job: ENOMEM");
 450                         return -1;
 451                 }
 452         }
 453
 454         if (ed->state == ED_NEW || (ed->state & ED_DEL)) {
 455                 urb_free_priv (purb_priv);
 456                 err("sohci_submit_job: EINVAL");
 457                 return -1;
 458         }
 459
 460         /* link the ed into a chain if is not already */
 461         if (ed->state != ED_OPER)
 462                 ep_link (ohci, ed);
 463
 464         /* fill the TDs and link it to the ed */
 465         td_submit_job(dev, pipe, buffer, transfer_len, setup, purb_priv, interval);
 466
 467         return 0;
 468 }
 469
 470 /*-------------------------------------------------------------------------*/
 471
 472 #ifdef DEBUG
 473 /* tell us the current USB frame number */
 474
 475 static int sohci_get_current_frame_number (struct usb_device *usb_dev)
 476 {
 477         ohci_t *ohci = &gohci;
 478
 479         return m16_swap (ohci->hcca->frame_no);
 480 }
 481 #endif
 482
 483 /*-------------------------------------------------------------------------*
 484  * ED handling functions
 485  *-------------------------------------------------------------------------*/
 486
 487 /* link an ed into one of the HC chains */
 488
 489 static int ep_link (ohci_t *ohci, ed_t *edi)
 490 {
 491         volatile ed_t *ed = edi;
 492
 493         ed->state = ED_OPER;
 494
 495         switch (ed->type) {
 496         case PIPE_CONTROL:
 497                 ed->hwNextED = 0;
 498                 if (ohci->ed_controltail == NULL) {
 499                         writel (ed, &ohci->regs->ed_controlhead);
 500                 } else {
 501                         ohci->ed_controltail->hwNextED = (__u32)m32_swap (ed);
 502                 }
 503                 ed->ed_prev = ohci->ed_controltail;
 504                 if (!ohci->ed_controltail && !ohci->ed_rm_list[0] &&
 505                         !ohci->ed_rm_list[1] && !ohci->sleeping) {
 506                         ohci->hc_control |= OHCI_CTRL_CLE;
 507                         writel (ohci->hc_control, &ohci->regs->control);
 508                 }
 509                 ohci->ed_controltail = edi;
 510                 break;
 511
 512         case PIPE_BULK:
 513                 ed->hwNextED = 0;
 514                 if (ohci->ed_bulktail == NULL) {
 515                         writel (ed, &ohci->regs->ed_bulkhead);
 516                 } else {
 517                         ohci->ed_bulktail->hwNextED = (__u32)m32_swap (ed);
 518                 }
 519                 ed->ed_prev = ohci->ed_bulktail;
 520                 if (!ohci->ed_bulktail && !ohci->ed_rm_list[0] &&
 521                         !ohci->ed_rm_list[1] && !ohci->sleeping) {
 522                         ohci->hc_control |= OHCI_CTRL_BLE;
 523                         writel (ohci->hc_control, &ohci->regs->control);
 524                 }
 525                 ohci->ed_bulktail = edi;
 526                 break;
 527         }
 528         return 0;
 529 }
 530
 531 /*-------------------------------------------------------------------------*/
 532
 533 /* unlink an ed from one of the HC chains.
 534  * just the link to the ed is unlinked.
 535  * the link from the ed still points to another operational ed or 0
 536  * so the HC can eventually finish the processing of the unlinked ed */
 537
 538 static int ep_unlink (ohci_t *ohci, ed_t *ed)
 539 {
 540         ed->hwINFO |= m32_swap (OHCI_ED_SKIP);
 541
 542         switch (ed->type) {
 543         case PIPE_CONTROL:
 544                 if (ed->ed_prev == NULL) {
 545                         if (!ed->hwNextED) {
 546                                 ohci->hc_control &= ~OHCI_CTRL_CLE;
 547                                 writel (ohci->hc_control, &ohci->regs->control);
 548                         }
 549                         writel (m32_swap (*((__u32 *)&ed->hwNextED)), &ohci->regs->ed_controlhead);
 550                 } else {
 551                         ed->ed_prev->hwNextED = ed->hwNextED;
 552                 }
 553                 if (ohci->ed_controltail == ed) {
 554                         ohci->ed_controltail = ed->ed_prev;
 555                 } else {
 556                         ((ed_t *)m32_swap (*((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
 557                 }
 558                 break;
 559
 560         case PIPE_BULK:
 561                 if (ed->ed_prev == NULL) {
 562                         if (!ed->hwNextED) {
 563                                 ohci->hc_control &= ~OHCI_CTRL_BLE;
 564                                 writel (ohci->hc_control, &ohci->regs->control);
 565                         }
 566                         writel (m32_swap (*((__u32 *)&ed->hwNextED)), &ohci->regs->ed_bulkhead);
 567                 } else {
 568                         ed->ed_prev->hwNextED = ed->hwNextED;
 569                 }
 570                 if (ohci->ed_bulktail == ed) {
 571                         ohci->ed_bulktail = ed->ed_prev;
 572                 } else {
 573                         ((ed_t *)m32_swap (*((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
 574                 }
 575                 break;
 576         }
 577         ed->state = ED_UNLINK;
 578         return 0;
 579 }
 580
 581
 582 /*-------------------------------------------------------------------------*/
 583
 584 /* add/reinit an endpoint; this should be done once at the usb_set_configuration command,
 585  * but the USB stack is a little bit stateless  so we do it at every transaction
 586  * if the state of the ed is ED_NEW then a dummy td is added and the state is changed to ED_UNLINK
 587  * in all other cases the state is left unchanged
 588  * the ed info fields are setted anyway even though most of them should not change */
 589
 590 static ed_t * ep_add_ed (struct usb_device *usb_dev, unsigned long pipe)
 591 {
 592         td_t *td;
 593         ed_t *ed_ret;
 594         volatile ed_t *ed;
 595
 596         ed = ed_ret = &ohci_dev.ed[(usb_pipeendpoint (pipe) << 1) |
 597                         (usb_pipecontrol (pipe)? 0: usb_pipeout (pipe))];
 598
 599         if ((ed->state & ED_DEL) || (ed->state & ED_URB_DEL)) {
 600                 err("ep_add_ed: pending delete");
 601                 /* pending delete request */
 602                 return NULL;
 603         }
 604
 605         if (ed->state == ED_NEW) {
 606                 ed->hwINFO = m32_swap (OHCI_ED_SKIP); /* skip ed */
 607                 /* dummy td; end of td list for ed */
 608                 td = td_alloc (usb_dev);
 609                 ed->hwTailP = (__u32)m32_swap (td);
 610                 ed->hwHeadP = ed->hwTailP;
 611                 ed->state = ED_UNLINK;
 612                 ed->type = usb_pipetype (pipe);
 613                 ohci_dev.ed_cnt++;
 614         }
 615
 616         ed->hwINFO = m32_swap (usb_pipedevice (pipe)
 617                         | usb_pipeendpoint (pipe) << 7
 618                         | (usb_pipeisoc (pipe)? 0x8000: 0)
 619                         | (usb_pipecontrol (pipe)? 0: (usb_pipeout (pipe)? 0x800: 0x1000))
 620                         | usb_pipeslow (pipe) << 13
 621                         | usb_maxpacket (usb_dev, pipe) << 16);
 622
 623         return ed_ret;
 624 }
 625
 626 /*-------------------------------------------------------------------------*
 627  * TD handling functions
 628  *-------------------------------------------------------------------------*/
 629
 630 /* enqueue next TD for this URB (OHCI spec 5.2.8.2) */
 631
 632 static void td_fill (ohci_t *ohci, unsigned int info,
 633         void *data, int len,
 634         struct usb_device *dev, int index, urb_priv_t *urb_priv)
 635 {
 636         volatile td_t  *td, *td_pt;
 637 #ifdef OHCI_FILL_TRACE
 638         int i;
 639 #endif
 640
 641         if (index > urb_priv->length) {
 642                 err("index > length");
 643                 return;
 644         }
 645         /* use this td as the next dummy */
 646         td_pt = urb_priv->td [index];
 647         td_pt->hwNextTD = 0;
 648
 649         /* fill the old dummy TD */
 650         td = urb_priv->td [index] = (td_t *)(m32_swap (urb_priv->ed->hwTailP) & ~0xf);
 651
 652         td->ed = urb_priv->ed;
 653         td->next_dl_td = NULL;
 654         td->index = index;
 655         td->data = (__u32)data;
 656 #ifdef OHCI_FILL_TRACE
 657         if ((usb_pipetype(urb_priv->pipe) == PIPE_BULK) && usb_pipeout(urb_priv->pipe)) {
 658                 for (i = 0; i < len; i++)
 659                 printf("td->data[%d] %#2x ",i, ((unsigned char *)td->data)[i]);
 660                 printf("\n");
 661         }
 662 #endif
 663         if (!len)
 664                 data = 0;
 665
 666         td->hwINFO = (__u32)m32_swap (info);
 667         td->hwCBP = (__u32)m32_swap (data);
 668         if (data)
 669                 td->hwBE = (__u32)m32_swap (data + len - 1);
 670         else
 671                 td->hwBE = 0;
 672         td->hwNextTD = (__u32)m32_swap (td_pt);
 673
 674         /* append to queue */
 675         td->ed->hwTailP = td->hwNextTD;
 676 }
 677
 678 /*-------------------------------------------------------------------------*/
 679
 680 /* prepare all TDs of a transfer */
 681
 682 static void td_submit_job (struct usb_device *dev, unsigned long pipe, void *buffer,
 683         int transfer_len, struct devrequest *setup, urb_priv_t *urb, int interval)
 684 {
 685         ohci_t *ohci = &gohci;
 686         int data_len = transfer_len;
 687         void *data;
 688         int cnt = 0;
 689         __u32 info = 0;
 690         unsigned int toggle = 0;
 691
 692         /* OHCI handles the DATA-toggles itself, we just use the USB-toggle bits for reseting */
 693         if(usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe))) {
 694                 toggle = TD_T_TOGGLE;
 695         } else {
 696                 toggle = TD_T_DATA0;
 697                 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 1);
 698         }
 699         urb->td_cnt = 0;
 700         if (data_len)
 701                 data = buffer;
 702         else
 703                 data = 0;
 704
 705         switch (usb_pipetype (pipe)) {
 706         case PIPE_BULK:
 707                 info = usb_pipeout (pipe)?
 708                         TD_CC | TD_DP_OUT : TD_CC | TD_DP_IN ;
 709                 while(data_len > 4096) {
 710                         td_fill (ohci, info | (cnt? TD_T_TOGGLE:toggle), data, 4096, dev, cnt, urb);
 711                         data += 4096; data_len -= 4096; cnt++;
 712                 }
 713                 info = usb_pipeout (pipe)?
 714                         TD_CC | TD_DP_OUT : TD_CC | TD_R | TD_DP_IN ;
 715                 td_fill (ohci, info | (cnt? TD_T_TOGGLE:toggle), data, data_len, dev, cnt, urb);
 716                 cnt++;
 717
 718                 if (!ohci->sleeping)
 719                         writel (OHCI_BLF, &ohci->regs->cmdstatus); /* start bulk list */
 720                 break;
 721
 722         case PIPE_CONTROL:
 723                 info = TD_CC | TD_DP_SETUP | TD_T_DATA0;
 724                 td_fill (ohci, info, setup, 8, dev, cnt++, urb);
 725                 if (data_len > 0) {
 726                         info = usb_pipeout (pipe)?
 727                                 TD_CC | TD_R | TD_DP_OUT | TD_T_DATA1 : TD_CC | TD_R | TD_DP_IN | TD_T_DATA1;
 728                         /* NOTE:  mishandles transfers >8K, some >4K */
 729                         td_fill (ohci, info, data, data_len, dev, cnt++, urb);
 730                 }
 731                 info = usb_pipeout (pipe)?
 732                         TD_CC | TD_DP_IN | TD_T_DATA1: TD_CC | TD_DP_OUT | TD_T_DATA1;
 733                 td_fill (ohci, info, data, 0, dev, cnt++, urb);
 734                 if (!ohci->sleeping)
 735                         writel (OHCI_CLF, &ohci->regs->cmdstatus); /* start Control list */
 736                 break;
 737         }
 738         if (urb->length != cnt)
 739                 dbg("TD LENGTH %d != CNT %d", urb->length, cnt);
 740 }
 741
 742 /*-------------------------------------------------------------------------*
 743  * Done List handling functions
 744  *-------------------------------------------------------------------------*/
 745
 746
 747 /* calculate the transfer length and update the urb */
 748
 749 static void dl_transfer_length(td_t * td)
 750 {
 751         __u32 tdINFO, tdBE, tdCBP;
 752         urb_priv_t *lurb_priv = &urb_priv;
 753
 754         tdINFO = m32_swap (td->hwINFO);
 755         tdBE   = m32_swap (td->hwBE);
 756         tdCBP  = m32_swap (td->hwCBP);
 757
 758
 759         if (!(usb_pipetype (lurb_priv->pipe) == PIPE_CONTROL &&
 760             ((td->index == 0) || (td->index == lurb_priv->length - 1)))) {
 761                 if (tdBE != 0) {
 762                         if (td->hwCBP == 0)
 763                                 lurb_priv->actual_length += tdBE - td->data + 1;
 764                         else
 765                                 lurb_priv->actual_length += tdCBP - td->data;
 766                 }
 767         }
 768 }
 769
 770 /*-------------------------------------------------------------------------*/
 771
 772 /* replies to the request have to be on a FIFO basis so
 773  * we reverse the reversed done-list */
 774
 775 static td_t * dl_reverse_done_list (ohci_t *ohci)
 776 {
 777         __u32 td_list_hc;
 778         td_t *td_rev = NULL;
 779         td_t *td_list = NULL;
 780         urb_priv_t *lurb_priv = NULL;
 781
 782         td_list_hc = m32_swap (ohci->hcca->done_head) & 0xfffffff0;
 783         ohci->hcca->done_head = 0;
 784
 785         while (td_list_hc) {
 786                 td_list = (td_t *)td_list_hc;
 787
 788                 if (TD_CC_GET (m32_swap (td_list->hwINFO))) {
 789                         lurb_priv = &urb_priv;
 790                         dbg(" USB-error/status: %x : %p",
 791                                         TD_CC_GET (m32_swap (td_list->hwINFO)), td_list);
 792                         if (td_list->ed->hwHeadP & m32_swap (0x1)) {
 793                                 if (lurb_priv && ((td_list->index + 1) < lurb_priv->length)) {
 794                                         td_list->ed->hwHeadP =
 795                                                 (lurb_priv->td[lurb_priv->length - 1]->hwNextTD & m32_swap (0xfffffff0)) |
 796                                                                         (td_list->ed->hwHeadP & m32_swap (0x2));
 797                                         lurb_priv->td_cnt += lurb_priv->length - td_list->index - 1;
 798                                 } else
 799                                         td_list->ed->hwHeadP &= m32_swap (0xfffffff2);
 800                         }
 801                 }
 802
 803                 td_list->next_dl_td = td_rev;
 804                 td_rev = td_list;
 805                 td_list_hc = m32_swap (td_list->hwNextTD) & 0xfffffff0;
 806         }
 807
 808         return td_list;
 809 }
 810
 811 /*-------------------------------------------------------------------------*/
 812
 813 /* td done list */
 814 static int dl_done_list (ohci_t *ohci, td_t *td_list)
 815 {
 816         td_t *td_list_next = NULL;
 817         ed_t *ed;
 818         int cc = 0;
 819         int stat = 0;
 820         /* urb_t *urb; */
 821         urb_priv_t *lurb_priv;
 822         __u32 tdINFO, edHeadP, edTailP;
 823
 824         while (td_list) {
 825                 td_list_next = td_list->next_dl_td;
 826
 827                 lurb_priv = &urb_priv;
 828                 tdINFO = m32_swap (td_list->hwINFO);
 829
 830                 ed = td_list->ed;
 831
 832                 dl_transfer_length(td_list);
 833
 834                 /* error code of transfer */
 835                 cc = TD_CC_GET (tdINFO);
 836                 if (cc != 0) {
 837                         dbg("ConditionCode %#x", cc);
 838                         stat = cc_to_error[cc];
 839                 }
 840
 841                 /* see if this done list makes for all TD's of current URB,
 842                  * and mark the URB finished if so */
 843                 if (++(lurb_priv->td_cnt) == lurb_priv->length) {
 844                         if ((ed->state & (ED_OPER | ED_UNLINK)))
 845                                 urb_finished = 1;
 846                         else
 847                                 dbg("dl_done_list: strange.., ED state %x, ed->state\n");
 848                 } else
 849                         dbg("dl_done_list: processing TD %x, len %x\n", lurb_priv->td_cnt,
 850                                 lurb_priv->length);
 851
 852                 if (ed->state != ED_NEW) {
 853                         edHeadP = m32_swap (ed->hwHeadP) & 0xfffffff0;
 854                         edTailP = m32_swap (ed->hwTailP);
 855
 856                         /* unlink eds if they are not busy */
 857                         if ((edHeadP == edTailP) && (ed->state == ED_OPER))
 858                                 ep_unlink (ohci, ed);
 859                 }
 860
 861                 td_list = td_list_next;
 862         }
 863         return stat;
 864 }
 865
 866 /*-------------------------------------------------------------------------*
 867  * Virtual Root Hub
 868  *-------------------------------------------------------------------------*/
 869
 870 /* Device descriptor */
 871 static __u8 root_hub_dev_des[] =
 872 {
 873         0x12,       /*  __u8  bLength; */
 874         0x01,       /*  __u8  bDescriptorType; Device */
 875         0x10,       /*  __u16 bcdUSB; v1.1 */
 876         0x01,
 877         0x09,       /*  __u8  bDeviceClass; HUB_CLASSCODE */
 878         0x00,       /*  __u8  bDeviceSubClass; */
 879         0x00,       /*  __u8  bDeviceProtocol; */
 880         0x08,       /*  __u8  bMaxPacketSize0; 8 Bytes */
 881         0x00,       /*  __u16 idVendor; */
 882         0x00,
 883         0x00,       /*  __u16 idProduct; */
 884         0x00,
 885         0x00,       /*  __u16 bcdDevice; */
 886         0x00,
 887         0x00,       /*  __u8  iManufacturer; */
 888         0x01,       /*  __u8  iProduct; */
 889         0x00,       /*  __u8  iSerialNumber; */
 890         0x01        /*  __u8  bNumConfigurations; */
 891 };
 892
 893
 894 /* Configuration descriptor */
 895 static __u8 root_hub_config_des[] =
 896 {
 897         0x09,       /*  __u8  bLength; */
 898         0x02,       /*  __u8  bDescriptorType; Configuration */
 899         0x19,       /*  __u16 wTotalLength; */
 900         0x00,
 901         0x01,       /*  __u8  bNumInterfaces; */
 902         0x01,       /*  __u8  bConfigurationValue; */
 903         0x00,       /*  __u8  iConfiguration; */
 904         0x40,       /*  __u8  bmAttributes;
 905                  Bit 7: Bus-powered, 6: Self-powered, 5 Remote-wakwup, 4..0: resvd */
 906         0x00,       /*  __u8  MaxPower; */
 907
 908         /* interface */
 909         0x09,       /*  __u8  if_bLength; */
 910         0x04,       /*  __u8  if_bDescriptorType; Interface */
 911         0x00,       /*  __u8  if_bInterfaceNumber; */
 912         0x00,       /*  __u8  if_bAlternateSetting; */
 913         0x01,       /*  __u8  if_bNumEndpoints; */
 914         0x09,       /*  __u8  if_bInterfaceClass; HUB_CLASSCODE */
 915         0x00,       /*  __u8  if_bInterfaceSubClass; */
 916         0x00,       /*  __u8  if_bInterfaceProtocol; */
 917         0x00,       /*  __u8  if_iInterface; */
 918
 919         /* endpoint */
 920         0x07,       /*  __u8  ep_bLength; */
 921         0x05,       /*  __u8  ep_bDescriptorType; Endpoint */
 922         0x81,       /*  __u8  ep_bEndpointAddress; IN Endpoint 1 */
 923         0x03,       /*  __u8  ep_bmAttributes; Interrupt */
 924         0x02,       /*  __u16 ep_wMaxPacketSize; ((MAX_ROOT_PORTS + 1) / 8 */
 925         0x00,
 926         0xff        /*  __u8  ep_bInterval; 255 ms */
 927 };
 928
 929 static unsigned char root_hub_str_index0[] =
 930 {
 931         0x04,                   /*  __u8  bLength; */
 932         0x03,                   /*  __u8  bDescriptorType; String-descriptor */
 933         0x09,                   /*  __u8  lang ID */
 934         0x04,                   /*  __u8  lang ID */
 935 };
 936
 937 static unsigned char root_hub_str_index1[] =
 938 {
 939         28,                     /*  __u8  bLength; */
 940         0x03,                   /*  __u8  bDescriptorType; String-descriptor */
 941         'O',                    /*  __u8  Unicode */
 942         0,                              /*  __u8  Unicode */
 943         'H',                    /*  __u8  Unicode */
 944         0,                              /*  __u8  Unicode */
 945         'C',                    /*  __u8  Unicode */
 946         0,                              /*  __u8  Unicode */
 947         'I',                    /*  __u8  Unicode */
 948         0,                              /*  __u8  Unicode */
 949         ' ',                    /*  __u8  Unicode */
 950         0,                              /*  __u8  Unicode */
 951         'R',                    /*  __u8  Unicode */
 952         0,                              /*  __u8  Unicode */
 953         'o',                    /*  __u8  Unicode */
 954         0,                              /*  __u8  Unicode */
 955         'o',                    /*  __u8  Unicode */
 956         0,                              /*  __u8  Unicode */
 957         't',                    /*  __u8  Unicode */
 958         0,                              /*  __u8  Unicode */
 959         ' ',                    /*  __u8  Unicode */
 960         0,                              /*  __u8  Unicode */
 961         'H',                    /*  __u8  Unicode */
 962         0,                              /*  __u8  Unicode */
 963         'u',                    /*  __u8  Unicode */
 964         0,                              /*  __u8  Unicode */
 965         'b',                    /*  __u8  Unicode */
 966         0,                              /*  __u8  Unicode */
 967 };
 968
 969 /* Hub class-specific descriptor is constructed dynamically */
 970
 971
 972 /*-------------------------------------------------------------------------*/
 973
 974 #define OK(x)                   len = (x); break
 975 #ifdef DEBUG
 976 #define WR_RH_STAT(x)           {info("WR:status %#8x", (x));writel((x), &gohci.regs->roothub.status);}
 977 #define WR_RH_PORTSTAT(x)       {info("WR:portstatus[%d] %#8x", wIndex-1, (x));writel((x), &gohci.regs->roothub.portstatus[wIndex-1]);}
 978 #else
 979 #define WR_RH_STAT(x)           writel((x), &gohci.regs->roothub.status)
 980 #define WR_RH_PORTSTAT(x)       writel((x), &gohci.regs->roothub.portstatus[wIndex-1])
 981 #endif
 982 #define RD_RH_STAT              roothub_status(&gohci)
 983 #define RD_RH_PORTSTAT          roothub_portstatus(&gohci,wIndex-1)
 984
 985 /* request to virtual root hub */
 986
 987 int rh_check_port_status(ohci_t *controller)
 988 {
 989         __u32 temp, ndp, i;
 990         int res;
 991
 992         res = -1;
 993         temp = roothub_a (controller);
 994         ndp = (temp & RH_A_NDP);
 995         for (i = 0; i < ndp; i++) {
 996                 temp = roothub_portstatus (controller, i);
 997                 /* check for a device disconnect */
 998                 if (((temp & (RH_PS_PESC | RH_PS_CSC)) ==
 999                         (RH_PS_PESC | RH_PS_CSC)) &&
1000                         ((temp & RH_PS_CCS) == 0)) {
1001                         res = i;
1002                         break;
1003                 }
1004         }
1005         return res;
1006 }
1007
1008 static int ohci_submit_rh_msg(struct usb_device *dev, unsigned long pipe,
1009                 void *buffer, int transfer_len, struct devrequest *cmd)
1010 {
1011         void * data = buffer;
1012         int leni = transfer_len;
1013         int len = 0;
1014         int stat = 0;
1015         __u32 datab[4];
1016         __u8 *data_buf = (__u8 *)datab;
1017         __u16 bmRType_bReq;
1018         __u16 wValue;
1019         __u16 wIndex;
1020         __u16 wLength;
1021
1022 #ifdef DEBUG
1023 urb_priv.actual_length = 0;
1024 pkt_print(dev, pipe, buffer, transfer_len, cmd, "SUB(rh)", usb_pipein(pipe));
1025 #else
1026         wait_ms(1);
1027 #endif
1028         if ((pipe & PIPE_INTERRUPT) == PIPE_INTERRUPT) {
1029                 info("Root-Hub submit IRQ: NOT implemented");
1030                 return 0;
1031         }
1032
1033         bmRType_bReq  = cmd->requesttype | (cmd->request << 8);
1034         wValue        = m16_swap (cmd->value);
1035         wIndex        = m16_swap (cmd->index);
1036         wLength       = m16_swap (cmd->length);
1037
1038         info("Root-Hub: adr: %2x cmd(%1x): %08x %04x %04x %04x",
1039                 dev->devnum, 8, bmRType_bReq, wValue, wIndex, wLength);
1040
1041         switch (bmRType_bReq) {
1042         /* Request Destination:
1043            without flags: Device,
1044            RH_INTERFACE: interface,
1045            RH_ENDPOINT: endpoint,
1046            RH_CLASS means HUB here,
1047            RH_OTHER | RH_CLASS  almost ever means HUB_PORT here
1048         */
1049
1050         case RH_GET_STATUS:
1051                         *(__u16 *) data_buf = m16_swap (1); OK (2);
1052         case RH_GET_STATUS | RH_INTERFACE:
1053                         *(__u16 *) data_buf = m16_swap (0); OK (2);
1054         case RH_GET_STATUS | RH_ENDPOINT:
1055                         *(__u16 *) data_buf = m16_swap (0); OK (2);
1056         case RH_GET_STATUS | RH_CLASS:
1057                         *(__u32 *) data_buf = m32_swap (
1058                                 RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE));
1059                         OK (4);
1060         case RH_GET_STATUS | RH_OTHER | RH_CLASS:
1061                         *(__u32 *) data_buf = m32_swap (RD_RH_PORTSTAT); OK (4);
1062
1063         case RH_CLEAR_FEATURE | RH_ENDPOINT:
1064                 switch (wValue) {
1065                         case (RH_ENDPOINT_STALL): OK (0);
1066                 }
1067                 break;
1068
1069         case RH_CLEAR_FEATURE | RH_CLASS:
1070                 switch (wValue) {
1071                         case RH_C_HUB_LOCAL_POWER:
1072                                 OK(0);
1073                         case (RH_C_HUB_OVER_CURRENT):
1074                                         WR_RH_STAT(RH_HS_OCIC); OK (0);
1075                 }
1076                 break;
1077
1078         case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
1079                 switch (wValue) {
1080                         case (RH_PORT_ENABLE):
1081                                         WR_RH_PORTSTAT (RH_PS_CCS ); OK (0);
1082                         case (RH_PORT_SUSPEND):
1083                                         WR_RH_PORTSTAT (RH_PS_POCI); OK (0);
1084                         case (RH_PORT_POWER):
1085                                         WR_RH_PORTSTAT (RH_PS_LSDA); OK (0);
1086                         case (RH_C_PORT_CONNECTION):
1087                                         WR_RH_PORTSTAT (RH_PS_CSC ); OK (0);
1088                         case (RH_C_PORT_ENABLE):
1089                                         WR_RH_PORTSTAT (RH_PS_PESC); OK (0);
1090                         case (RH_C_PORT_SUSPEND):
1091                                         WR_RH_PORTSTAT (RH_PS_PSSC); OK (0);
1092                         case (RH_C_PORT_OVER_CURRENT):
1093                                         WR_RH_PORTSTAT (RH_PS_OCIC); OK (0);
1094                         case (RH_C_PORT_RESET):
1095                                         WR_RH_PORTSTAT (RH_PS_PRSC); OK (0);
1096                 }
1097                 break;
1098
1099         case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
1100                 switch (wValue) {
1101                         case (RH_PORT_SUSPEND):
1102                                         WR_RH_PORTSTAT (RH_PS_PSS ); OK (0);
1103                         case (RH_PORT_RESET): /* BUG IN HUP CODE *********/
1104                                         if (RD_RH_PORTSTAT & RH_PS_CCS)
1105                                             WR_RH_PORTSTAT (RH_PS_PRS);
1106                                         OK (0);
1107                         case (RH_PORT_POWER):
1108                                         WR_RH_PORTSTAT (RH_PS_PPS ); OK (0);
1109                         case (RH_PORT_ENABLE): /* BUG IN HUP CODE *********/
1110                                         if (RD_RH_PORTSTAT & RH_PS_CCS)
1111                                             WR_RH_PORTSTAT (RH_PS_PES );
1112                                         OK (0);
1113                 }
1114                 break;
1115
1116         case RH_SET_ADDRESS: gohci.rh.devnum = wValue; OK(0);
1117
1118         case RH_GET_DESCRIPTOR:
1119                 switch ((wValue & 0xff00) >> 8) {
1120                         case (0x01): /* device descriptor */
1121                                 len = min_t(unsigned int,
1122                                           leni,
1123                                           min_t(unsigned int,
1124                                               sizeof (root_hub_dev_des),
1125                                               wLength));
1126                                 data_buf = root_hub_dev_des; OK(len);
1127                         case (0x02): /* configuration descriptor */
1128                                 len = min_t(unsigned int,
1129                                           leni,
1130                                           min_t(unsigned int,
1131                                               sizeof (root_hub_config_des),
1132                                               wLength));
1133                                 data_buf = root_hub_config_des; OK(len);
1134                         case (0x03): /* string descriptors */
1135                                 if(wValue==0x0300) {
1136                                         len = min_t(unsigned int,
1137                                                   leni,
1138                                                   min_t(unsigned int,
1139                                                       sizeof (root_hub_str_index0),
1140                                                       wLength));
1141                                         data_buf = root_hub_str_index0;
1142                                         OK(len);
1143                                 }
1144                                 if(wValue==0x0301) {
1145                                         len = min_t(unsigned int,
1146                                                   leni,
1147                                                   min_t(unsigned int,
1148                                                       sizeof (root_hub_str_index1),
1149                                                       wLength));
1150                                         data_buf = root_hub_str_index1;
1151                                         OK(len);
1152                         }
1153                         default:
1154                                 stat = USB_ST_STALLED;
1155                 }
1156                 break;
1157
1158         case RH_GET_DESCRIPTOR | RH_CLASS:
1159             {
1160                     __u32 temp = roothub_a (&gohci);
1161
1162                     data_buf [0] = 9;           /* min length; */
1163                     data_buf [1] = 0x29;
1164                     data_buf [2] = temp & RH_A_NDP;
1165                     data_buf [3] = 0;
1166                     if (temp & RH_A_PSM)        /* per-port power switching? */
1167                         data_buf [3] |= 0x1;
1168                     if (temp & RH_A_NOCP)       /* no overcurrent reporting? */
1169                         data_buf [3] |= 0x10;
1170                     else if (temp & RH_A_OCPM)  /* per-port overcurrent reporting? */
1171                         data_buf [3] |= 0x8;
1172
1173                     /* corresponds to data_buf[4-7] */
1174                     datab [1] = 0;
1175                     data_buf [5] = (temp & RH_A_POTPGT) >> 24;
1176                     temp = roothub_b (&gohci);
1177                     data_buf [7] = temp & RH_B_DR;
1178                     if (data_buf [2] < 7) {
1179                         data_buf [8] = 0xff;
1180                     } else {
1181                         data_buf [0] += 2;
1182                         data_buf [8] = (temp & RH_B_DR) >> 8;
1183                         data_buf [10] = data_buf [9] = 0xff;
1184                     }
1185
1186                     len = min_t(unsigned int, leni,
1187                               min_t(unsigned int, data_buf [0], wLength));
1188                     OK (len);
1189                 }
1190
1191         case RH_GET_CONFIGURATION:      *(__u8 *) data_buf = 0x01; OK (1);
1192
1193         case RH_SET_CONFIGURATION:      WR_RH_STAT (0x10000); OK (0);
1194
1195         default:
1196                 dbg ("unsupported root hub command");
1197                 stat = USB_ST_STALLED;
1198         }
1199
1200 #ifdef  DEBUG
1201         ohci_dump_roothub (&gohci, 1);
1202 #else
1203         wait_ms(1);
1204 #endif
1205
1206         len = min_t(int, len, leni);
1207         if (data != data_buf)
1208             memcpy (data, data_buf, len);
1209         dev->act_len = len;
1210         dev->status = stat;
1211
1212 #ifdef DEBUG
1213         if (transfer_len)
1214                 urb_priv.actual_length = transfer_len;
1215         pkt_print(dev, pipe, buffer, transfer_len, cmd, "RET(rh)", 0/*usb_pipein(pipe)*/);
1216 #else
1217         wait_ms(1);
1218 #endif
1219
1220         return stat;
1221 }
1222
1223 /*-------------------------------------------------------------------------*/
1224
1225 /* common code for handling submit messages - used for all but root hub */
1226 /* accesses. */
1227 int submit_common_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1228                 int transfer_len, struct devrequest *setup, int interval)
1229 {
1230         int stat = 0;
1231         int maxsize = usb_maxpacket(dev, pipe);
1232         int timeout;
1233
1234         /* device pulled? Shortcut the action. */
1235         if (devgone == dev) {
1236                 dev->status = USB_ST_CRC_ERR;
1237                 return 0;
1238         }
1239
1240 #ifdef DEBUG
1241         urb_priv.actual_length = 0;
1242         pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB", usb_pipein(pipe));
1243 #else
1244         wait_ms(1);
1245 #endif
1246         if (!maxsize) {
1247                 err("submit_common_message: pipesize for pipe %lx is zero",
1248                         pipe);
1249                 return -1;
1250         }
1251
1252         if (sohci_submit_job(dev, pipe, buffer, transfer_len, setup, interval) < 0) {
1253                 err("sohci_submit_job failed");
1254                 return -1;
1255         }
1256
1257         wait_ms(10);
1258         /* ohci_dump_status(&gohci); */
1259
1260         /* allow more time for a BULK device to react - some are slow */
1261 #define BULK_TO  5000   /* timeout in milliseconds */
1262         if (usb_pipetype (pipe) == PIPE_BULK)
1263                 timeout = BULK_TO;
1264         else
1265                 timeout = 100;
1266
1267         /* wait for it to complete */
1268         for (;;) {
1269                 /* check whether the controller is done */
1270                 stat = hc_interrupt();
1271
1272                 if (stat < 0) {
1273                         stat = USB_ST_CRC_ERR;
1274                         break;
1275                 }
1276
1277                 /* NOTE: since we are not interrupt driven in U-Boot and always
1278                  * handle only one URB at a time, we cannot assume the
1279                  * transaction finished on the first successful return from
1280                  * hc_interrupt().. unless the flag for current URB is set,
1281                  * meaning that all TD's to/from device got actually
1282                  * transferred and processed. If the current URB is not
1283                  * finished we need to re-iterate this loop so as
1284                  * hc_interrupt() gets called again as there needs to be some
1285                  * more TD's to process still */
1286                 if ((stat >= 0) && (stat != 0xff) && (urb_finished)) {
1287                         /* 0xff is returned for an SF-interrupt */
1288                         break;
1289                 }
1290
1291                 if (--timeout) {
1292                         wait_ms(1);
1293                         if (!urb_finished)
1294                                 dbg("\%");
1295
1296                 } else {
1297                         err("CTL:TIMEOUT ");
1298                         dbg("submit_common_msg: TO status %x\n", stat);
1299                         stat = USB_ST_CRC_ERR;
1300                         urb_finished = 1;
1301                         break;
1302                 }
1303         }
1304
1305 #if 0
1306         /* we got an Root Hub Status Change interrupt */
1307         if (got_rhsc) {
1308 #ifdef DEBUG
1309                 ohci_dump_roothub (&gohci, 1);
1310 #endif
1311                 got_rhsc = 0;
1312                 /* abuse timeout */
1313                 timeout = rh_check_port_status(&gohci);
1314                 if (timeout >= 0) {
1315 #if 0 /* this does nothing useful, but leave it here in case that changes */
1316                         /* the called routine adds 1 to the passed value */
1317                         usb_hub_port_connect_change(gohci.rh.dev, timeout - 1);
1318 #endif
1319                         /*
1320                          * XXX
1321                          * This is potentially dangerous because it assumes
1322                          * that only one device is ever plugged in!
1323                          */
1324                         devgone = dev;
1325                 }
1326         }
1327 #endif
1328
1329         dev->status = stat;
1330         dev->act_len = transfer_len;
1331
1332 #ifdef DEBUG
1333         pkt_print(dev, pipe, buffer, transfer_len, setup, "RET(ctlr)", usb_pipein(pipe));
1334 #else
1335         wait_ms(1);
1336 #endif
1337
1338         /* free TDs in urb_priv */
1339         urb_free_priv (&urb_priv);
1340         return 0;
1341 }
1342
1343 /* submit routines called from usb.c */
1344 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1345                 int transfer_len)
1346 {
1347         info("submit_bulk_msg");
1348         return submit_common_msg(dev, pipe, buffer, transfer_len, NULL, 0);
1349 }
1350
1351 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1352                 int transfer_len, struct devrequest *setup)
1353 {
1354         int maxsize = usb_maxpacket(dev, pipe);
1355
1356         info("submit_control_msg");
1357 #ifdef DEBUG
1358         urb_priv.actual_length = 0;
1359         pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB", usb_pipein(pipe));
1360 #else
1361         wait_ms(1);
1362 #endif
1363         if (!maxsize) {
1364                 err("submit_control_message: pipesize for pipe %lx is zero",
1365                         pipe);
1366                 return -1;
1367         }
1368         if (((pipe >> 8) & 0x7f) == gohci.rh.devnum) {
1369                 gohci.rh.dev = dev;
1370                 /* root hub - redirect */
1371                 return ohci_submit_rh_msg(dev, pipe, buffer, transfer_len,
1372                         setup);
1373         }
1374
1375         return submit_common_msg(dev, pipe, buffer, transfer_len, setup, 0);
1376 }
1377
1378 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1379                 int transfer_len, int interval)
1380 {
1381         info("submit_int_msg");
1382         return -1;
1383 }
1384
1385 /*-------------------------------------------------------------------------*
1386  * HC functions
1387  *-------------------------------------------------------------------------*/
1388
1389 /* reset the HC and BUS */
1390
1391 static int hc_reset (ohci_t *ohci)
1392 {
1393         int timeout = 30;
1394         int smm_timeout = 50; /* 0,5 sec */
1395
1396         if (readl (&ohci->regs->control) & OHCI_CTRL_IR) { /* SMM owns the HC */
1397                 writel (OHCI_OCR, &ohci->regs->cmdstatus); /* request ownership */
1398                 info("USB HC TakeOver from SMM");
1399                 while (readl (&ohci->regs->control) & OHCI_CTRL_IR) {
1400                         wait_ms (10);
1401                         if (--smm_timeout == 0) {
1402                                 err("USB HC TakeOver failed!");
1403                                 return -1;
1404                         }
1405                 }
1406         }
1407
1408         /* Disable HC interrupts */
1409         writel (OHCI_INTR_MIE, &ohci->regs->intrdisable);
1410
1411         dbg("USB HC reset_hc usb-%s: ctrl = 0x%X ;",
1412                 ohci->slot_name,
1413                 readl (&ohci->regs->control));
1414
1415         /* Reset USB (needed by some controllers) */
1416         writel (0, &ohci->regs->control);
1417
1418         /* HC Reset requires max 10 us delay */
1419         writel (OHCI_HCR,  &ohci->regs->cmdstatus);
1420         while ((readl (&ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
1421                 if (--timeout == 0) {
1422                         err("USB HC reset timed out!");
1423                         return -1;
1424                 }
1425                 udelay (1);
1426         }
1427         return 0;
1428 }
1429
1430 /*-------------------------------------------------------------------------*/
1431
1432 /* Start an OHCI controller, set the BUS operational
1433  * enable interrupts
1434  * connect the virtual root hub */
1435
1436 static int hc_start (ohci_t * ohci)
1437 {
1438         __u32 mask;
1439         unsigned int fminterval;
1440
1441         ohci->disabled = 1;
1442
1443         /* Tell the controller where the control and bulk lists are
1444          * The lists are empty now. */
1445
1446         writel (0, &ohci->regs->ed_controlhead);
1447         writel (0, &ohci->regs->ed_bulkhead);
1448
1449         writel ((__u32)ohci->hcca, &ohci->regs->hcca); /* a reset clears this */
1450
1451         fminterval = 0x2edf;
1452         writel ((fminterval * 9) / 10, &ohci->regs->periodicstart);
1453         fminterval |= ((((fminterval - 210) * 6) / 7) << 16);
1454         writel (fminterval, &ohci->regs->fminterval);
1455         writel (0x628, &ohci->regs->lsthresh);
1456
1457         /* start controller operations */
1458         ohci->hc_control = OHCI_CONTROL_INIT | OHCI_USB_OPER;
1459         ohci->disabled = 0;
1460         writel (ohci->hc_control, &ohci->regs->control);
1461
1462         /* disable all interrupts */
1463         mask = (OHCI_INTR_SO | OHCI_INTR_WDH | OHCI_INTR_SF | OHCI_INTR_RD |
1464                         OHCI_INTR_UE | OHCI_INTR_FNO | OHCI_INTR_RHSC |
1465                         OHCI_INTR_OC | OHCI_INTR_MIE);
1466         writel (mask, &ohci->regs->intrdisable);
1467         /* clear all interrupts */
1468         mask &= ~OHCI_INTR_MIE;
1469         writel (mask, &ohci->regs->intrstatus);
1470         /* Choose the interrupts we care about now  - but w/o MIE */
1471         mask = OHCI_INTR_RHSC | OHCI_INTR_UE | OHCI_INTR_WDH | OHCI_INTR_SO;
1472         writel (mask, &ohci->regs->intrenable);
1473
1474 #ifdef  OHCI_USE_NPS
1475         /* required for AMD-756 and some Mac platforms */
1476         writel ((roothub_a (ohci) | RH_A_NPS) & ~RH_A_PSM,
1477                 &ohci->regs->roothub.a);
1478         writel (RH_HS_LPSC, &ohci->regs->roothub.status);
1479 #endif  /* OHCI_USE_NPS */
1480
1481 #define mdelay(n) ({unsigned long msec=(n); while (msec--) udelay(1000);})
1482         /* POTPGT delay is bits 24-31, in 2 ms units. */
1483         mdelay ((roothub_a (ohci) >> 23) & 0x1fe);
1484
1485         /* connect the virtual root hub */
1486         ohci->rh.devnum = 0;
1487
1488         return 0;
1489 }
1490
1491 /*-------------------------------------------------------------------------*/
1492
1493 /* an interrupt happens */
1494
1495 static int
1496 hc_interrupt (void)
1497 {
1498         ohci_t *ohci = &gohci;
1499         struct ohci_regs *regs = ohci->regs;
1500         int ints;
1501         int stat = -1;
1502
1503         if ((ohci->hcca->done_head != 0) &&
1504              !(m32_swap (ohci->hcca->done_head) & 0x01)) {
1505
1506                 ints =  OHCI_INTR_WDH;
1507
1508         } else if ((ints = readl (&regs->intrstatus)) == ~(u32)0) {
1509                 ohci->disabled++;
1510                 err ("%s device removed!", ohci->slot_name);
1511                 return -1;
1512
1513         } else if ((ints &= readl (&regs->intrenable)) == 0) {
1514                 dbg("hc_interrupt: returning..\n");
1515                 return 0xff;
1516         }
1517
1518         /* dbg("Interrupt: %x frame: %x", ints, le16_to_cpu (ohci->hcca->frame_no)); */
1519
1520         if (ints & OHCI_INTR_RHSC) {
1521                 got_rhsc = 1;
1522                 stat = 0xff;
1523         }
1524
1525         if (ints & OHCI_INTR_UE) {
1526                 ohci->disabled++;
1527                 err ("OHCI Unrecoverable Error, controller usb-%s disabled",
1528                         ohci->slot_name);
1529                 /* e.g. due to PCI Master/Target Abort */
1530
1531 #ifdef  DEBUG
1532                 ohci_dump (ohci, 1);
1533 #else
1534         wait_ms(1);
1535 #endif
1536                 /* FIXME: be optimistic, hope that bug won't repeat often. */
1537                 /* Make some non-interrupt context restart the controller. */
1538                 /* Count and limit the retries though; either hardware or */
1539                 /* software errors can go forever... */
1540                 hc_reset (ohci);
1541                 return -1;
1542         }
1543
1544         if (ints & OHCI_INTR_WDH) {
1545                 wait_ms(1);
1546
1547                 writel (OHCI_INTR_WDH, &regs->intrdisable);
1548                 stat = dl_done_list (&gohci, dl_reverse_done_list (&gohci));
1549                 writel (OHCI_INTR_WDH, &regs->intrenable);
1550         }
1551
1552         if (ints & OHCI_INTR_SO) {
1553                 dbg("USB Schedule overrun\n");
1554                 writel (OHCI_INTR_SO, &regs->intrenable);
1555                 stat = -1;
1556         }
1557
1558         /* FIXME:  this assumes SOF (1/ms) interrupts don't get lost... */
1559         if (ints & OHCI_INTR_SF) {
1560                 unsigned int frame = m16_swap (ohci->hcca->frame_no) & 1;
1561                 wait_ms(1);
1562                 writel (OHCI_INTR_SF, &regs->intrdisable);
1563                 if (ohci->ed_rm_list[frame] != NULL)
1564                         writel (OHCI_INTR_SF, &regs->intrenable);
1565                 stat = 0xff;
1566         }
1567
1568         writel (ints, &regs->intrstatus);
1569         return stat;
1570 }
1571
1572 /*-------------------------------------------------------------------------*/
1573
1574 /*-------------------------------------------------------------------------*/
1575
1576 /* De-allocate all resources.. */
1577
1578 static void hc_release_ohci (ohci_t *ohci)
1579 {
1580         dbg ("USB HC release ohci usb-%s", ohci->slot_name);
1581
1582         if (!ohci->disabled)
1583                 hc_reset (ohci);
1584 }
1585
1586 /*-------------------------------------------------------------------------*/
1587
1588 /*
1589  * low level initalisation routine, called from usb.c
1590  */
1591 static char ohci_inited = 0;
1592
1593 int usb_lowlevel_init(void)
1594 {
1595         S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();
1596         S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();
1597
1598         /*
1599          * Set the 48 MHz UPLL clocking. Values are taken from
1600          * "PLL value selection guide", 6-23, s3c2400_UM.pdf.
1601          */
1602         clk_power->UPLLCON = ((40 << 12) + (1 << 4) + 2);
1603         gpio->MISCCR |= 0x8; /* 1 = use pads related USB for USB host */
1604
1605         /*
1606          * Enable USB host clock.
1607          */
1608         clk_power->CLKCON |= (1 << 4);
1609
1610         memset (&gohci, 0, sizeof (ohci_t));
1611         memset (&urb_priv, 0, sizeof (urb_priv_t));
1612
1613         /* align the storage */
1614         if ((__u32)&ghcca[0] & 0xff) {
1615                 err("HCCA not aligned!!");
1616                 return -1;
1617         }
1618         phcca = &ghcca[0];
1619         info("aligned ghcca %p", phcca);
1620         memset(&ohci_dev, 0, sizeof(struct ohci_device));
1621         if ((__u32)&ohci_dev.ed[0] & 0x7) {
1622                 err("EDs not aligned!!");
1623                 return -1;
1624         }
1625         memset(gtd, 0, sizeof(td_t) * (NUM_TD + 1));
1626         if ((__u32)gtd & 0x7) {
1627                 err("TDs not aligned!!");
1628                 return -1;
1629         }
1630         ptd = gtd;
1631         gohci.hcca = phcca;
1632         memset (phcca, 0, sizeof (struct ohci_hcca));
1633
1634         gohci.disabled = 1;
1635         gohci.sleeping = 0;
1636         gohci.irq = -1;
1637         gohci.regs = (struct ohci_regs *)S3C24X0_USB_HOST_BASE;
1638
1639         gohci.flags = 0;
1640         gohci.slot_name = "s3c2400";
1641
1642         if (hc_reset (&gohci) < 0) {
1643                 hc_release_ohci (&gohci);
1644                 /* Initialization failed */
1645                 clk_power->CLKCON &= ~(1 << 4);
1646                 return -1;
1647         }
1648
1649         /* FIXME this is a second HC reset; why?? */
1650         gohci.hc_control = OHCI_USB_RESET;
1651         writel (gohci.hc_control, &gohci.regs->control);
1652         wait_ms (10);
1653
1654         if (hc_start (&gohci) < 0) {
1655                 err ("can't start usb-%s", gohci.slot_name);
1656                 hc_release_ohci (&gohci);
1657                 /* Initialization failed */
1658                 clk_power->CLKCON &= ~(1 << 4);
1659                 return -1;
1660         }
1661
1662 #ifdef  DEBUG
1663         ohci_dump (&gohci, 1);
1664 #else
1665         wait_ms(1);
1666 #endif
1667         ohci_inited = 1;
1668         urb_finished = 1;
1669
1670         return 0;
1671 }
1672
1673 int usb_lowlevel_stop(void)
1674 {
1675         S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();
1676
1677         /* this gets called really early - before the controller has */
1678         /* even been initialized! */
1679         if (!ohci_inited)
1680                 return 0;
1681         /* TODO release any interrupts, etc. */
1682         /* call hc_release_ohci() here ? */
1683         hc_reset (&gohci);
1684         /* may not want to do this */
1685         clk_power->CLKCON &= ~(1 << 4);
1686         return 0;
1687 }
1688
1689 #endif /* CONFIG_USB_OHCI */