drivers/usb/host/ohci-s3c24xx.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 <garyj@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  * SPDX-License-Identifier:     GPL-2.0+
  12  */
  13 /*
  14  * IMPORTANT NOTES
  15  * 1 - this driver is intended for use with USB Mass Storage Devices
  16  *     (BBB) ONLY. There is NO support for Interrupt or Isochronous pipes!
  17  */
  18
  19 #include <common.h>
  20 /* #include <pci.h> no PCI on the S3C24X0 */
  21
  22 #if defined(CONFIG_USB_OHCI) && defined(CONFIG_S3C24X0)
  23
  24 #include <asm/arch/s3c24x0_cpu.h>
  25 #include <asm/io.h>
  26 #include <malloc.h>
  27 #include <usb.h>
  28 #include "ohci-s3c24xx.h"
  29
  30 #define OHCI_USE_NPS            /* force NoPowerSwitching mode */
  31 #undef OHCI_VERBOSE_DEBUG       /* not always helpful */
  32
  33
  34 /* For initializing controller (mask in an HCFS mode too) */
  35 #define OHCI_CONTROL_INIT \
  36         (OHCI_CTRL_CBSR & 0x3) | OHCI_CTRL_IE | OHCI_CTRL_PLE
  37
  38 #define min_t(type, x, y) \
  39         ({ type __x = (x); type __y = (y); __x < __y ? __x : __y; })
  40
  41 #undef DEBUG
  42 #ifdef DEBUG
  43 #define dbg(format, arg...) printf("DEBUG: " format "\n", ## arg)
  44 #else
  45 #define dbg(format, arg...) do {} while(0)
  46 #endif /* DEBUG */
  47 #define err(format, arg...) printf("ERROR: " format "\n", ## arg)
  48 #undef SHOW_INFO
  49 #ifdef SHOW_INFO
  50 #define info(format, arg...) printf("INFO: " format "\n", ## arg)
  51 #else
  52 #define info(format, arg...) do {} while(0)
  53 #endif
  54
  55 #define m16_swap(x) swap_16(x)
  56 #define m32_swap(x) swap_32(x)
  57
  58 /* global struct ohci */
  59 static struct ohci gohci;
  60 /* this must be aligned to a 256 byte boundary */
  61 struct ohci_hcca ghcca[1];
  62 /* a pointer to the aligned storage */
  63 struct ohci_hcca *phcca;
  64 /* this allocates EDs for all possible endpoints */
  65 struct ohci_device ohci_dev;
  66 /* urb_priv */
  67 struct urb_priv urb_priv;
  68 /* RHSC flag */
  69 int got_rhsc;
  70 /* device which was disconnected */
  71 struct usb_device *devgone;
  72 /* flag guarding URB transation */
  73 int urb_finished = 0;
  74
  75 /*-------------------------------------------------------------------------*/
  76
  77 /* AMD-756 (D2 rev) reports corrupt register contents in some cases.
  78  * The erratum (#4) description is incorrect.  AMD's workaround waits
  79  * till some bits (mostly reserved) are clear; ok for all revs.
  80  */
  81 #define OHCI_QUIRK_AMD756 0xabcd
  82 #define read_roothub(hc, register, mask) ({ \
  83         u32 temp = readl (&hc->regs->roothub.register); \
  84         if (hc->flags & OHCI_QUIRK_AMD756) \
  85                 while (temp & mask) \
  86                         temp = readl (&hc->regs->roothub.register); \
  87         temp; })
  88
  89 static u32 roothub_a(struct ohci *hc)
  90 {
  91         return read_roothub(hc, a, 0xfc0fe000);
  92 }
  93 static inline u32 roothub_b(struct ohci *hc)
  94 {
  95         return readl(&hc->regs->roothub.b);
  96 }
  97 static inline u32 roothub_status(struct ohci *hc)
  98 {
  99         return readl(&hc->regs->roothub.status);
 100 }
 101 static u32 roothub_portstatus(struct ohci *hc, int i)
 102 {
 103         return read_roothub(hc, portstatus[i], 0xffe0fce0);
 104 }
 105
 106 /* forward declaration */
 107 static int hc_interrupt(void);
 108 static void td_submit_job(struct usb_device *dev, unsigned long pipe,
 109                           void *buffer, int transfer_len,
 110                           struct devrequest *setup, struct urb_priv *urb,
 111                           int interval);
 112
 113 /*-------------------------------------------------------------------------*
 114  * URB support functions
 115  *-------------------------------------------------------------------------*/
 116
 117 /* free HCD-private data associated with this URB */
 118
 119 static void urb_free_priv(struct urb_priv *urb)
 120 {
 121         int i;
 122         int last;
 123         struct td *td;
 124
 125         last = urb->length - 1;
 126         if (last >= 0) {
 127                 for (i = 0; i <= last; i++) {
 128                         td = urb->td[i];
 129                         if (td) {
 130                                 td->usb_dev = NULL;
 131                                 urb->td[i] = NULL;
 132                         }
 133                 }
 134         }
 135 }
 136
 137 /*-------------------------------------------------------------------------*/
 138
 139 #ifdef DEBUG
 140 static int sohci_get_current_frame_number(struct usb_device *dev);
 141
 142 /* debug| print the main components of an URB
 143  * small: 0) header + data packets 1) just header */
 144
 145 static void pkt_print(struct usb_device *dev, unsigned long pipe, void *buffer,
 146                       int transfer_len, struct devrequest *setup, char *str,
 147                       int small)
 148 {
 149         struct urb_priv *purb = &urb_priv;
 150
 151         dbg("%s URB:[%4x] dev:%2d,ep:%2d-%c,type:%s,len:%d/%d stat:%#lx",
 152             str,
 153             sohci_get_current_frame_number(dev),
 154             usb_pipedevice(pipe),
 155             usb_pipeendpoint(pipe),
 156             usb_pipeout(pipe) ? 'O' : 'I',
 157             usb_pipetype(pipe) < 2 ?
 158                 (usb_pipeint(pipe) ? "INTR" : "ISOC") :
 159                 (usb_pipecontrol(pipe) ? "CTRL" : "BULK"),
 160             purb->actual_length, transfer_len, dev->status);
 161 #ifdef  OHCI_VERBOSE_DEBUG
 162         if (!small) {
 163                 int i, len;
 164
 165                 if (usb_pipecontrol(pipe)) {
 166                         printf(__FILE__ ": cmd(8):");
 167                         for (i = 0; i < 8; i++)
 168                                 printf(" %02x", ((__u8 *) setup)[i]);
 169                         printf("\n");
 170                 }
 171                 if (transfer_len > 0 && buffer) {
 172                         printf(__FILE__ ": data(%d/%d):",
 173                                purb->actual_length, transfer_len);
 174                         len = usb_pipeout(pipe) ?
 175                             transfer_len : purb->actual_length;
 176                         for (i = 0; i < 16 && i < len; i++)
 177                                 printf(" %02x", ((__u8 *) buffer)[i]);
 178                         printf("%s\n", i < len ? "..." : "");
 179                 }
 180         }
 181 #endif
 182 }
 183
 184 /* just for debugging; prints non-empty branches of the
 185    int ed tree inclusive iso eds*/
 186 void ep_print_int_eds(struct ohci *ohci, char *str)
 187 {
 188         int i, j;
 189         __u32 *ed_p;
 190         for (i = 0; i < 32; i++) {
 191                 j = 5;
 192                 ed_p = &(ohci->hcca->int_table[i]);
 193                 if (*ed_p == 0)
 194                         continue;
 195                 printf(__FILE__ ": %s branch int %2d(%2x):", str, i, i);
 196                 while (*ed_p != 0 && j--) {
 197                         struct ed *ed = (struct ed *) m32_swap(ed_p);
 198                         printf(" ed: %4x;", ed->hwINFO);
 199                         ed_p = &ed->hwNextED;
 200                 }
 201                 printf("\n");
 202         }
 203 }
 204
 205 static void ohci_dump_intr_mask(char *label, __u32 mask)
 206 {
 207         dbg("%s: 0x%08x%s%s%s%s%s%s%s%s%s",
 208             label,
 209             mask,
 210             (mask & OHCI_INTR_MIE) ? " MIE" : "",
 211             (mask & OHCI_INTR_OC) ? " OC" : "",
 212             (mask & OHCI_INTR_RHSC) ? " RHSC" : "",
 213             (mask & OHCI_INTR_FNO) ? " FNO" : "",
 214             (mask & OHCI_INTR_UE) ? " UE" : "",
 215             (mask & OHCI_INTR_RD) ? " RD" : "",
 216             (mask & OHCI_INTR_SF) ? " SF" : "",
 217             (mask & OHCI_INTR_WDH) ? " WDH" : "",
 218             (mask & OHCI_INTR_SO) ? " SO" : "");
 219 }
 220
 221 static void maybe_print_eds(char *label, __u32 value)
 222 {
 223         struct ed *edp = (struct ed *) value;
 224
 225         if (value) {
 226                 dbg("%s %08x", label, value);
 227                 dbg("%08x", edp->hwINFO);
 228                 dbg("%08x", edp->hwTailP);
 229                 dbg("%08x", edp->hwHeadP);
 230                 dbg("%08x", edp->hwNextED);
 231         }
 232 }
 233
 234 static char *hcfs2string(int state)
 235 {
 236         switch (state) {
 237         case OHCI_USB_RESET:
 238                 return "reset";
 239         case OHCI_USB_RESUME:
 240                 return "resume";
 241         case OHCI_USB_OPER:
 242                 return "operational";
 243         case OHCI_USB_SUSPEND:
 244                 return "suspend";
 245         }
 246         return "?";
 247 }
 248
 249 /* dump control and status registers */
 250 static void ohci_dump_status(struct ohci *controller)
 251 {
 252         struct ohci_regs *regs = controller->regs;
 253         __u32 temp;
 254
 255         temp = readl(&regs->revision) & 0xff;
 256         if (temp != 0x10)
 257                 dbg("spec %d.%d", (temp >> 4), (temp & 0x0f));
 258
 259         temp = readl(&regs->control);
 260         dbg("control: 0x%08x%s%s%s HCFS=%s%s%s%s%s CBSR=%d", temp,
 261             (temp & OHCI_CTRL_RWE) ? " RWE" : "",
 262             (temp & OHCI_CTRL_RWC) ? " RWC" : "",
 263             (temp & OHCI_CTRL_IR) ? " IR" : "",
 264             hcfs2string(temp & OHCI_CTRL_HCFS),
 265             (temp & OHCI_CTRL_BLE) ? " BLE" : "",
 266             (temp & OHCI_CTRL_CLE) ? " CLE" : "",
 267             (temp & OHCI_CTRL_IE) ? " IE" : "",
 268             (temp & OHCI_CTRL_PLE) ? " PLE" : "", temp & OHCI_CTRL_CBSR);
 269
 270         temp = readl(&regs->cmdstatus);
 271         dbg("cmdstatus: 0x%08x SOC=%d%s%s%s%s", temp,
 272             (temp & OHCI_SOC) >> 16,
 273             (temp & OHCI_OCR) ? " OCR" : "",
 274             (temp & OHCI_BLF) ? " BLF" : "",
 275             (temp & OHCI_CLF) ? " CLF" : "", (temp & OHCI_HCR) ? " HCR" : "");
 276
 277         ohci_dump_intr_mask("intrstatus", readl(&regs->intrstatus));
 278         ohci_dump_intr_mask("intrenable", readl(&regs->intrenable));
 279
 280         maybe_print_eds("ed_periodcurrent", readl(&regs->ed_periodcurrent));
 281
 282         maybe_print_eds("ed_controlhead", readl(&regs->ed_controlhead));
 283         maybe_print_eds("ed_controlcurrent", readl(&regs->ed_controlcurrent));
 284
 285         maybe_print_eds("ed_bulkhead", readl(&regs->ed_bulkhead));
 286         maybe_print_eds("ed_bulkcurrent", readl(&regs->ed_bulkcurrent));
 287
 288         maybe_print_eds("donehead", readl(&regs->donehead));
 289 }
 290
 291 static void ohci_dump_roothub(struct ohci *controller, int verbose)
 292 {
 293         __u32 temp, ndp, i;
 294
 295         temp = roothub_a(controller);
 296         ndp = (temp & RH_A_NDP);
 297
 298         if (verbose) {
 299                 dbg("roothub.a: %08x POTPGT=%d%s%s%s%s%s NDP=%d", temp,
 300                     ((temp & RH_A_POTPGT) >> 24) & 0xff,
 301                     (temp & RH_A_NOCP) ? " NOCP" : "",
 302                     (temp & RH_A_OCPM) ? " OCPM" : "",
 303                     (temp & RH_A_DT) ? " DT" : "",
 304                     (temp & RH_A_NPS) ? " NPS" : "",
 305                     (temp & RH_A_PSM) ? " PSM" : "", ndp);
 306                 temp = roothub_b(controller);
 307                 dbg("roothub.b: %08x PPCM=%04x DR=%04x",
 308                     temp, (temp & RH_B_PPCM) >> 16, (temp & RH_B_DR)
 309                     );
 310                 temp = roothub_status(controller);
 311                 dbg("roothub.status: %08x%s%s%s%s%s%s",
 312                     temp,
 313                     (temp & RH_HS_CRWE) ? " CRWE" : "",
 314                     (temp & RH_HS_OCIC) ? " OCIC" : "",
 315                     (temp & RH_HS_LPSC) ? " LPSC" : "",
 316                     (temp & RH_HS_DRWE) ? " DRWE" : "",
 317                     (temp & RH_HS_OCI) ? " OCI" : "",
 318                     (temp & RH_HS_LPS) ? " LPS" : "");
 319         }
 320
 321         for (i = 0; i < ndp; i++) {
 322                 temp = roothub_portstatus(controller, i);
 323                 dbg("roothub.portstatus [%d] = 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s",
 324                     i,
 325                     temp,
 326                     (temp & RH_PS_PRSC) ? " PRSC" : "",
 327                     (temp & RH_PS_OCIC) ? " OCIC" : "",
 328                     (temp & RH_PS_PSSC) ? " PSSC" : "",
 329                     (temp & RH_PS_PESC) ? " PESC" : "",
 330                     (temp & RH_PS_CSC) ? " CSC" : "",
 331                     (temp & RH_PS_LSDA) ? " LSDA" : "",
 332                     (temp & RH_PS_PPS) ? " PPS" : "",
 333                     (temp & RH_PS_PRS) ? " PRS" : "",
 334                     (temp & RH_PS_POCI) ? " POCI" : "",
 335                     (temp & RH_PS_PSS) ? " PSS" : "",
 336                     (temp & RH_PS_PES) ? " PES" : "",
 337                     (temp & RH_PS_CCS) ? " CCS" : "");
 338         }
 339 }
 340
 341 static void ohci_dump(struct ohci *controller, int verbose)
 342 {
 343         dbg("OHCI controller usb-%s state", controller->slot_name);
 344
 345         /* dumps some of the state we know about */
 346         ohci_dump_status(controller);
 347         if (verbose)
 348                 ep_print_int_eds(controller, "hcca");
 349         dbg("hcca frame #%04x", controller->hcca->frame_no);
 350         ohci_dump_roothub(controller, 1);
 351 }
 352
 353 #endif /* DEBUG */
 354
 355 /*-------------------------------------------------------------------------*
 356  * Interface functions (URB)
 357  *-------------------------------------------------------------------------*/
 358
 359 /* get a transfer request */
 360
 361 int sohci_submit_job(struct usb_device *dev, unsigned long pipe, void *buffer,
 362                      int transfer_len, struct devrequest *setup, int interval)
 363 {
 364         struct ohci *ohci;
 365         struct ed *ed;
 366         struct urb_priv *purb_priv;
 367         int i, size = 0;
 368
 369         ohci = &gohci;
 370
 371         /* when controller's hung, permit only roothub cleanup attempts
 372          * such as powering down ports */
 373         if (ohci->disabled) {
 374                 err("sohci_submit_job: EPIPE");
 375                 return -1;
 376         }
 377
 378         /* if we have an unfinished URB from previous transaction let's
 379          * fail and scream as quickly as possible so as not to corrupt
 380          * further communication */
 381         if (!urb_finished) {
 382                 err("sohci_submit_job: URB NOT FINISHED");
 383                 return -1;
 384         }
 385         /* we're about to begin a new transaction here
 386            so mark the URB unfinished */
 387         urb_finished = 0;
 388
 389         /* every endpoint has a ed, locate and fill it */
 390         ed = ep_add_ed(dev, pipe);
 391         if (!ed) {
 392                 err("sohci_submit_job: ENOMEM");
 393                 return -1;
 394         }
 395
 396         /* for the private part of the URB we need the number of TDs (size) */
 397         switch (usb_pipetype(pipe)) {
 398         case PIPE_BULK:
 399                 /* one TD for every 4096 Byte */
 400                 size = (transfer_len - 1) / 4096 + 1;
 401                 break;
 402         case PIPE_CONTROL:
 403                 /* 1 TD for setup, 1 for ACK and 1 for every 4096 B */
 404                 size = (transfer_len == 0) ? 2 : (transfer_len - 1) / 4096 + 3;
 405                 break;
 406         }
 407
 408         if (size >= (N_URB_TD - 1)) {
 409                 err("need %d TDs, only have %d", size, N_URB_TD);
 410                 return -1;
 411         }
 412         purb_priv = &urb_priv;
 413         purb_priv->pipe = pipe;
 414
 415         /* fill the private part of the URB */
 416         purb_priv->length = size;
 417         purb_priv->ed = ed;
 418         purb_priv->actual_length = 0;
 419
 420         /* allocate the TDs */
 421         /* note that td[0] was allocated in ep_add_ed */
 422         for (i = 0; i < size; i++) {
 423                 purb_priv->td[i] = td_alloc(dev);
 424                 if (!purb_priv->td[i]) {
 425                         purb_priv->length = i;
 426                         urb_free_priv(purb_priv);
 427                         err("sohci_submit_job: ENOMEM");
 428                         return -1;
 429                 }
 430         }
 431
 432         if (ed->state == ED_NEW || (ed->state & ED_DEL)) {
 433                 urb_free_priv(purb_priv);
 434                 err("sohci_submit_job: EINVAL");
 435                 return -1;
 436         }
 437
 438         /* link the ed into a chain if is not already */
 439         if (ed->state != ED_OPER)
 440                 ep_link(ohci, ed);
 441
 442         /* fill the TDs and link it to the ed */
 443         td_submit_job(dev, pipe, buffer, transfer_len, setup, purb_priv,
 444                       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         struct ohci *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(struct ohci *ohci, struct ed *edi)
 469 {
 470         struct ed *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((u32)ed, &ohci->regs->ed_controlhead);
 479                 } else {
 480                         ohci->ed_controltail->hwNextED = (__u32) 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((u32)ed, &ohci->regs->ed_bulkhead);
 495                 } else {
 496                         ohci->ed_bulktail->hwNextED = (__u32) 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(struct ohci *ohci, struct ed *ed)
 518 {
 519         struct ed *next;
 520         ed->hwINFO |= m32_swap(OHCI_ED_SKIP);
 521
 522         switch (ed->type) {
 523         case PIPE_CONTROL:
 524                 if (ed->ed_prev == NULL) {
 525                         if (!ed->hwNextED) {
 526                                 ohci->hc_control &= ~OHCI_CTRL_CLE;
 527                                 writel(ohci->hc_control, &ohci->regs->control);
 528                         }
 529                         writel(m32_swap(*((__u32 *) &ed->hwNextED)),
 530                                &ohci->regs->ed_controlhead);
 531                 } else {
 532                         ed->ed_prev->hwNextED = ed->hwNextED;
 533                 }
 534                 if (ohci->ed_controltail == ed) {
 535                         ohci->ed_controltail = ed->ed_prev;
 536                 } else {
 537                         next = (struct ed *)m32_swap(*((__u32 *)&ed->hwNextED));
 538                         next->ed_prev = ed->ed_prev;
 539                 }
 540                 break;
 541
 542         case PIPE_BULK:
 543                 if (ed->ed_prev == NULL) {
 544                         if (!ed->hwNextED) {
 545                                 ohci->hc_control &= ~OHCI_CTRL_BLE;
 546                                 writel(ohci->hc_control, &ohci->regs->control);
 547                         }
 548                         writel(m32_swap(*((__u32 *) &ed->hwNextED)),
 549                                &ohci->regs->ed_bulkhead);
 550                 } else {
 551                         ed->ed_prev->hwNextED = ed->hwNextED;
 552                 }
 553                 if (ohci->ed_bulktail == ed) {
 554                         ohci->ed_bulktail = ed->ed_prev;
 555                 } else {
 556                         next = (struct ed *)m32_swap(*((__u32 *)&ed->hwNextED));
 557                         next->ed_prev = ed->ed_prev;
 558                 }
 559                 break;
 560         }
 561         ed->state = ED_UNLINK;
 562         return 0;
 563 }
 564
 565 /*-------------------------------------------------------------------------*/
 566
 567 /* add/reinit an endpoint; this should be done once at the usb_set_configuration
 568  * command, but the USB stack is a little bit stateless  so we do it at every
 569  * transaction. If the state of the ed is ED_NEW then a dummy td is added and
 570  * the state is changed to ED_UNLINK. In all other cases the state is left
 571  * unchanged. The ed info fields are setted anyway even though most of them
 572  * should not change */
 573
 574 static struct ed *ep_add_ed(struct usb_device *usb_dev, unsigned long pipe)
 575 {
 576         struct td *td;
 577         struct ed *ed_ret;
 578         struct ed *ed;
 579
 580         ed = ed_ret = &ohci_dev.ed[(usb_pipeendpoint(pipe) << 1) |
 581                                    (usb_pipecontrol(pipe) ? 0 :
 582                                     usb_pipeout(pipe))];
 583
 584         if ((ed->state & ED_DEL) || (ed->state & ED_URB_DEL)) {
 585                 err("ep_add_ed: pending delete");
 586                 /* pending delete request */
 587                 return NULL;
 588         }
 589
 590         if (ed->state == ED_NEW) {
 591                 ed->hwINFO = m32_swap(OHCI_ED_SKIP);    /* skip ed */
 592                 /* dummy td; end of td list for ed */
 593                 td = td_alloc(usb_dev);
 594                 ed->hwTailP = (__u32) m32_swap(td);
 595                 ed->hwHeadP = ed->hwTailP;
 596                 ed->state = ED_UNLINK;
 597                 ed->type = usb_pipetype(pipe);
 598                 ohci_dev.ed_cnt++;
 599         }
 600
 601         ed->hwINFO = m32_swap(usb_pipedevice(pipe)
 602                               | usb_pipeendpoint(pipe) << 7
 603                               | (usb_pipeisoc(pipe) ? 0x8000 : 0)
 604                               | (usb_pipecontrol(pipe) ? 0 :
 605                                  (usb_pipeout(pipe) ? 0x800 : 0x1000))
 606                               | (usb_dev->speed == USB_SPEED_LOW) << 13 |
 607                               usb_maxpacket(usb_dev, pipe) << 16);
 608
 609         return ed_ret;
 610 }
 611
 612 /*-------------------------------------------------------------------------*
 613  * TD handling functions
 614  *-------------------------------------------------------------------------*/
 615
 616 /* enqueue next TD for this URB (OHCI spec 5.2.8.2) */
 617
 618 static void td_fill(struct ohci *ohci, unsigned int info, void *data, int len,
 619                     struct usb_device *dev, int index,
 620                     struct urb_priv *urb_priv)
 621 {
 622         struct td *td, *td_pt;
 623 #ifdef OHCI_FILL_TRACE
 624         int i;
 625 #endif
 626
 627         if (index > urb_priv->length) {
 628                 err("index > length");
 629                 return;
 630         }
 631         /* use this td as the next dummy */
 632         td_pt = urb_priv->td[index];
 633         td_pt->hwNextTD = 0;
 634
 635         /* fill the old dummy TD */
 636         td = urb_priv->td[index] =
 637             (struct td *) (m32_swap(urb_priv->ed->hwTailP) & ~0xf);
 638
 639         td->ed = urb_priv->ed;
 640         td->next_dl_td = NULL;
 641         td->index = index;
 642         td->data = (__u32) data;
 643 #ifdef OHCI_FILL_TRACE
 644         if (usb_pipebulk(urb_priv->pipe) && usb_pipeout(urb_priv->pipe)) {
 645                 for (i = 0; i < len; i++)
 646                         printf("td->data[%d] %#2x ", i,
 647                                ((unsigned char *)td->data)[i]);
 648                 printf("\n");
 649         }
 650 #endif
 651         if (!len)
 652                 data = 0;
 653
 654         td->hwINFO = (__u32) m32_swap(info);
 655         td->hwCBP = (__u32) m32_swap(data);
 656         if (data)
 657                 td->hwBE = (__u32) m32_swap(data + len - 1);
 658         else
 659                 td->hwBE = 0;
 660         td->hwNextTD = (__u32) m32_swap(td_pt);
 661
 662         /* append to queue */
 663         td->ed->hwTailP = td->hwNextTD;
 664 }
 665
 666 /*-------------------------------------------------------------------------*/
 667
 668 /* prepare all TDs of a transfer */
 669
 670 static void td_submit_job(struct usb_device *dev, unsigned long pipe,
 671                           void *buffer, int transfer_len,
 672                           struct devrequest *setup, struct urb_priv *urb,
 673                           int interval)
 674 {
 675         struct ohci *ohci = &gohci;
 676         int data_len = transfer_len;
 677         void *data;
 678         int cnt = 0;
 679         __u32 info = 0;
 680         unsigned int toggle = 0;
 681
 682         /* OHCI handles the DATA-toggles itself, we just
 683            use the USB-toggle bits for reseting */
 684         if (usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe))) {
 685                 toggle = TD_T_TOGGLE;
 686         } else {
 687                 toggle = TD_T_DATA0;
 688                 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe),
 689                               1);
 690         }
 691         urb->td_cnt = 0;
 692         if (data_len)
 693                 data = buffer;
 694         else
 695                 data = 0;
 696
 697         switch (usb_pipetype(pipe)) {
 698         case PIPE_BULK:
 699                 info = usb_pipeout(pipe) ? TD_CC | TD_DP_OUT : TD_CC | TD_DP_IN;
 700                 while (data_len > 4096) {
 701                         td_fill(ohci, info | (cnt ? TD_T_TOGGLE : toggle), data,
 702                                 4096, dev, cnt, urb);
 703                         data += 4096;
 704                         data_len -= 4096;
 705                         cnt++;
 706                 }
 707                 info = usb_pipeout(pipe) ?
 708                                 TD_CC | TD_DP_OUT :
 709                                 TD_CC | TD_R | TD_DP_IN;
 710                 td_fill(ohci, info | (cnt ? TD_T_TOGGLE : toggle), data,
 711                         data_len, dev, cnt, urb);
 712                 cnt++;
 713
 714                 if (!ohci->sleeping)
 715                         /* start bulk list */
 716                         writel(OHCI_BLF, &ohci->regs->cmdstatus);
 717                 break;
 718
 719         case PIPE_CONTROL:
 720                 info = TD_CC | TD_DP_SETUP | TD_T_DATA0;
 721                 td_fill(ohci, info, setup, 8, dev, cnt++, urb);
 722                 if (data_len > 0) {
 723                         info = usb_pipeout(pipe) ?
 724                             TD_CC | TD_R | TD_DP_OUT | TD_T_DATA1 :
 725                             TD_CC | TD_R | TD_DP_IN | TD_T_DATA1;
 726                         /* NOTE:  mishandles transfers >8K, some >4K */
 727                         td_fill(ohci, info, data, data_len, dev, cnt++, urb);
 728                 }
 729                 info = usb_pipeout(pipe) ?
 730                     TD_CC | TD_DP_IN | TD_T_DATA1 :
 731                     TD_CC | TD_DP_OUT | TD_T_DATA1;
 732                 td_fill(ohci, info, data, 0, dev, cnt++, urb);
 733                 if (!ohci->sleeping)
 734                         /* start Control list */
 735                         writel(OHCI_CLF, &ohci->regs->cmdstatus);
 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(struct td *td)
 750 {
 751         __u32 tdBE, tdCBP;
 752         struct urb_priv *lurb_priv = &urb_priv;
 753
 754         tdBE = m32_swap(td->hwBE);
 755         tdCBP = m32_swap(td->hwCBP);
 756
 757         if (!(usb_pipecontrol(lurb_priv->pipe) &&
 758               ((td->index == 0) || (td->index == lurb_priv->length - 1)))) {
 759                 if (tdBE != 0) {
 760                         if (td->hwCBP == 0)
 761                                 lurb_priv->actual_length += tdBE - td->data + 1;
 762                         else
 763                                 lurb_priv->actual_length += tdCBP - td->data;
 764                 }
 765         }
 766 }
 767
 768 /*-------------------------------------------------------------------------*/
 769
 770 /* replies to the request have to be on a FIFO basis so
 771  * we reverse the reversed done-list */
 772
 773 static struct td *dl_reverse_done_list(struct ohci *ohci)
 774 {
 775         __u32 td_list_hc;
 776         __u32 tmp;
 777         struct td *td_rev = NULL;
 778         struct td *td_list = NULL;
 779         struct urb_priv *lurb_priv = NULL;
 780
 781         td_list_hc = m32_swap(ohci->hcca->done_head) & 0xfffffff0;
 782         ohci->hcca->done_head = 0;
 783
 784         while (td_list_hc) {
 785                 td_list = (struct td *) td_list_hc;
 786
 787                 if (TD_CC_GET(m32_swap(td_list->hwINFO))) {
 788                         lurb_priv = &urb_priv;
 789                         dbg(" USB-error/status: %x : %p",
 790                             TD_CC_GET(m32_swap(td_list->hwINFO)), td_list);
 791                         if (td_list->ed->hwHeadP & m32_swap(0x1)) {
 792                                 if (lurb_priv &&
 793                                     ((td_list->index+1) < lurb_priv->length)) {
 794                                         tmp = lurb_priv->length - 1;
 795                                         td_list->ed->hwHeadP =
 796                                                 (lurb_priv->td[tmp]->hwNextTD &
 797                                                  m32_swap(0xfffffff0)) |
 798                                                  (td_list->ed->hwHeadP &
 799                                                   m32_swap(0x2));
 800                                         lurb_priv->td_cnt += lurb_priv->length -
 801                                                              td_list->index - 1;
 802                                 } else
 803                                         td_list->ed->hwHeadP &=
 804                                             m32_swap(0xfffffff2);
 805                         }
 806                 }
 807
 808                 td_list->next_dl_td = td_rev;
 809                 td_rev = td_list;
 810                 td_list_hc = m32_swap(td_list->hwNextTD) & 0xfffffff0;
 811         }
 812
 813         return td_list;
 814 }
 815
 816 /*-------------------------------------------------------------------------*/
 817
 818 /* td done list */
 819 static int dl_done_list(struct ohci *ohci, struct td *td_list)
 820 {
 821         struct td *td_list_next = NULL;
 822         struct ed *ed;
 823         int cc = 0;
 824         int stat = 0;
 825         /* urb_t *urb; */
 826         struct urb_priv *lurb_priv;
 827         __u32 tdINFO, edHeadP, edTailP;
 828
 829         while (td_list) {
 830                 td_list_next = td_list->next_dl_td;
 831
 832                 lurb_priv = &urb_priv;
 833                 tdINFO = m32_swap(td_list->hwINFO);
 834
 835                 ed = td_list->ed;
 836
 837                 dl_transfer_length(td_list);
 838
 839                 /* error code of transfer */
 840                 cc = TD_CC_GET(tdINFO);
 841                 if (cc != 0) {
 842                         dbg("ConditionCode %#x", cc);
 843                         stat = cc_to_error[cc];
 844                 }
 845
 846                 /* see if this done list makes for all TD's of current URB,
 847                  * and mark the URB finished if so */
 848                 if (++(lurb_priv->td_cnt) == lurb_priv->length) {
 849                         if ((ed->state & (ED_OPER | ED_UNLINK)))
 850                                 urb_finished = 1;
 851                         else
 852                                 dbg("dl_done_list: strange.., ED state %x, "
 853                                     "ed->state\n");
 854                 } else
 855                         dbg("dl_done_list: processing TD %x, len %x\n",
 856                             lurb_priv->td_cnt, lurb_priv->length);
 857
 858                 if (ed->state != ED_NEW) {
 859                         edHeadP = m32_swap(ed->hwHeadP) & 0xfffffff0;
 860                         edTailP = m32_swap(ed->hwTailP);
 861
 862                         /* unlink eds if they are not busy */
 863                         if ((edHeadP == edTailP) && (ed->state == ED_OPER))
 864                                 ep_unlink(ohci, ed);
 865                 }
 866
 867                 td_list = td_list_next;
 868         }
 869         return stat;
 870 }
 871
 872 /*-------------------------------------------------------------------------*
 873  * Virtual Root Hub
 874  *-------------------------------------------------------------------------*/
 875
 876 /* Device descriptor */
 877 static __u8 root_hub_dev_des[] = {
 878         0x12,   /*  __u8  bLength; */
 879         0x01,   /*  __u8  bDescriptorType; Device */
 880         0x10,   /*  __u16 bcdUSB; v1.1 */
 881         0x01,
 882         0x09,   /*  __u8  bDeviceClass; HUB_CLASSCODE */
 883         0x00,   /*  __u8  bDeviceSubClass; */
 884         0x00,   /*  __u8  bDeviceProtocol; */
 885         0x08,   /*  __u8  bMaxPacketSize0; 8 Bytes */
 886         0x00,   /*  __u16 idVendor; */
 887         0x00,
 888         0x00,   /*  __u16 idProduct; */
 889         0x00,
 890         0x00,   /*  __u16 bcdDevice; */
 891         0x00,
 892         0x00,   /*  __u8  iManufacturer; */
 893         0x01,   /*  __u8  iProduct; */
 894         0x00,   /*  __u8  iSerialNumber; */
 895         0x01    /*  __u8  bNumConfigurations; */
 896 };
 897
 898 /* Configuration descriptor */
 899 static __u8 root_hub_config_des[] = {
 900         0x09,   /*  __u8  bLength; */
 901         0x02,   /*  __u8  bDescriptorType; Configuration */
 902         0x19,   /*  __u16 wTotalLength; */
 903         0x00,
 904         0x01,   /*  __u8  bNumInterfaces; */
 905         0x01,   /*  __u8  bConfigurationValue; */
 906         0x00,   /*  __u8  iConfiguration; */
 907         0x40,   /*  __u8  bmAttributes;
 908                    Bit 7: Bus-powered, 6: Self-powered,
 909                    5 Remote-wakwup, 4..0: resvd */
 910         0x00,   /*  __u8  MaxPower; */
 911
 912         /* interface */
 913         0x09,   /*  __u8  if_bLength; */
 914         0x04,   /*  __u8  if_bDescriptorType; Interface */
 915         0x00,   /*  __u8  if_bInterfaceNumber; */
 916         0x00,   /*  __u8  if_bAlternateSetting; */
 917         0x01,   /*  __u8  if_bNumEndpoints; */
 918         0x09,   /*  __u8  if_bInterfaceClass; HUB_CLASSCODE */
 919         0x00,   /*  __u8  if_bInterfaceSubClass; */
 920         0x00,   /*  __u8  if_bInterfaceProtocol; */
 921         0x00,   /*  __u8  if_iInterface; */
 922
 923         /* endpoint */
 924         0x07,   /*  __u8  ep_bLength; */
 925         0x05,   /*  __u8  ep_bDescriptorType; Endpoint */
 926         0x81,   /*  __u8  ep_bEndpointAddress; IN Endpoint 1 */
 927         0x03,   /*  __u8  ep_bmAttributes; Interrupt */
 928         0x02,   /*  __u16 ep_wMaxPacketSize; ((MAX_ROOT_PORTS + 1) / 8 */
 929         0x00,
 930         0xff    /*  __u8  ep_bInterval; 255 ms */
 931 };
 932
 933 static unsigned char root_hub_str_index0[] = {
 934         0x04,   /*  __u8  bLength; */
 935         0x03,   /*  __u8  bDescriptorType; String-descriptor */
 936         0x09,   /*  __u8  lang ID */
 937         0x04,   /*  __u8  lang ID */
 938 };
 939
 940 static unsigned char root_hub_str_index1[] = {
 941         28,     /*  __u8  bLength; */
 942         0x03,   /*  __u8  bDescriptorType; String-descriptor */
 943         'O',    /*  __u8  Unicode */
 944         0,      /*  __u8  Unicode */
 945         'H',    /*  __u8  Unicode */
 946         0,      /*  __u8  Unicode */
 947         'C',    /*  __u8  Unicode */
 948         0,      /*  __u8  Unicode */
 949         'I',    /*  __u8  Unicode */
 950         0,      /*  __u8  Unicode */
 951         ' ',    /*  __u8  Unicode */
 952         0,      /*  __u8  Unicode */
 953         'R',    /*  __u8  Unicode */
 954         0,      /*  __u8  Unicode */
 955         'o',    /*  __u8  Unicode */
 956         0,      /*  __u8  Unicode */
 957         'o',    /*  __u8  Unicode */
 958         0,      /*  __u8  Unicode */
 959         't',    /*  __u8  Unicode */
 960         0,      /*  __u8  Unicode */
 961         ' ',    /*  __u8  Unicode */
 962         0,      /*  __u8  Unicode */
 963         'H',    /*  __u8  Unicode */
 964         0,      /*  __u8  Unicode */
 965         'u',    /*  __u8  Unicode */
 966         0,      /*  __u8  Unicode */
 967         'b',    /*  __u8  Unicode */
 968         0,      /*  __u8  Unicode */
 969 };
 970
 971 /* Hub class-specific descriptor is constructed dynamically */
 972
 973
 974 /*-------------------------------------------------------------------------*/
 975
 976 #define OK(x)                   len = (x); break
 977 #ifdef DEBUG
 978 #define WR_RH_STAT(x) \
 979 { \
 980         info("WR:status %#8x", (x)); \
 981         writel((x), &gohci.regs->roothub.status); \
 982 }
 983 #define WR_RH_PORTSTAT(x) \
 984 { \
 985         info("WR:portstatus[%d] %#8x", wIndex-1, (x)); \
 986         writel((x), &gohci.regs->roothub.portstatus[wIndex-1]); \
 987 }
 988 #else
 989 #define WR_RH_STAT(x) \
 990         writel((x), &gohci.regs->roothub.status)
 991 #define WR_RH_PORTSTAT(x)\
 992         writel((x), &gohci.regs->roothub.portstatus[wIndex-1])
 993 #endif
 994 #define RD_RH_STAT      roothub_status(&gohci)
 995 #define RD_RH_PORTSTAT  roothub_portstatus(&gohci, wIndex-1)
 996
 997 /* request to virtual root hub */
 998
 999 int rh_check_port_status(struct ohci *controller)
1000 {
1001         __u32 temp, ndp, i;
1002         int res;
1003
1004         res = -1;
1005         temp = roothub_a(controller);
1006         ndp = (temp & RH_A_NDP);
1007         for (i = 0; i < ndp; i++) {
1008                 temp = roothub_portstatus(controller, i);
1009                 /* check for a device disconnect */
1010                 if (((temp & (RH_PS_PESC | RH_PS_CSC)) ==
1011                      (RH_PS_PESC | RH_PS_CSC)) && ((temp & RH_PS_CCS) == 0)) {
1012                         res = i;
1013                         break;
1014                 }
1015         }
1016         return res;
1017 }
1018
1019 static int ohci_submit_rh_msg(struct usb_device *dev, unsigned long pipe,
1020                               void *buffer, int transfer_len,
1021                               struct devrequest *cmd)
1022 {
1023         void *data = buffer;
1024         int leni = transfer_len;
1025         int len = 0;
1026         int stat = 0;
1027         union {
1028                 __u32 word[4];
1029                 __u16 hword[8];
1030                 __u8 byte[16];
1031         } datab;
1032         __u8 *data_buf = datab.byte;
1033         __u16 bmRType_bReq;
1034         __u16 wValue;
1035         __u16 wIndex;
1036         __u16 wLength;
1037
1038 #ifdef DEBUG
1039         urb_priv.actual_length = 0;
1040         pkt_print(dev, pipe, buffer, transfer_len, cmd, "SUB(rh)",
1041                   usb_pipein(pipe));
1042 #else
1043         mdelay(1);
1044 #endif
1045         if (usb_pipeint(pipe)) {
1046                 info("Root-Hub submit IRQ: NOT implemented");
1047                 return 0;
1048         }
1049
1050         bmRType_bReq = cmd->requesttype | (cmd->request << 8);
1051         wValue = m16_swap(cmd->value);
1052         wIndex = m16_swap(cmd->index);
1053         wLength = m16_swap(cmd->length);
1054
1055         info("Root-Hub: adr: %2x cmd(%1x): %08x %04x %04x %04x",
1056              dev->devnum, 8, bmRType_bReq, wValue, wIndex, wLength);
1057
1058         switch (bmRType_bReq) {
1059                 /* Request Destination:
1060                    without flags: Device,
1061                    RH_INTERFACE: interface,
1062                    RH_ENDPOINT: endpoint,
1063                    RH_CLASS means HUB here,
1064                    RH_OTHER | RH_CLASS  almost ever means HUB_PORT here
1065                  */
1066
1067         case RH_GET_STATUS:
1068                 datab.hword[0] = m16_swap(1);
1069                 OK(2);
1070         case RH_GET_STATUS | RH_INTERFACE:
1071                 datab.hword[0] = m16_swap(0);
1072                 OK(2);
1073         case RH_GET_STATUS | RH_ENDPOINT:
1074                 datab.hword[0] = m16_swap(0);
1075                 OK(2);
1076         case RH_GET_STATUS | RH_CLASS:
1077                 datab.word[0] =
1078                     m32_swap(RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE));
1079                 OK(4);
1080         case RH_GET_STATUS | RH_OTHER | RH_CLASS:
1081                 datab.word[0] = m32_swap(RD_RH_PORTSTAT);
1082                 OK(4);
1083
1084         case RH_CLEAR_FEATURE | RH_ENDPOINT:
1085                 switch (wValue) {
1086                 case (RH_ENDPOINT_STALL):
1087                         OK(0);
1088                 }
1089                 break;
1090
1091         case RH_CLEAR_FEATURE | RH_CLASS:
1092                 switch (wValue) {
1093                 case RH_C_HUB_LOCAL_POWER:
1094                         OK(0);
1095                 case (RH_C_HUB_OVER_CURRENT):
1096                         WR_RH_STAT(RH_HS_OCIC);
1097                         OK(0);
1098                 }
1099                 break;
1100
1101         case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
1102                 switch (wValue) {
1103                 case (RH_PORT_ENABLE):
1104                         WR_RH_PORTSTAT(RH_PS_CCS);
1105                         OK(0);
1106                 case (RH_PORT_SUSPEND):
1107                         WR_RH_PORTSTAT(RH_PS_POCI);
1108                         OK(0);
1109                 case (RH_PORT_POWER):
1110                         WR_RH_PORTSTAT(RH_PS_LSDA);
1111                         OK(0);
1112                 case (RH_C_PORT_CONNECTION):
1113                         WR_RH_PORTSTAT(RH_PS_CSC);
1114                         OK(0);
1115                 case (RH_C_PORT_ENABLE):
1116                         WR_RH_PORTSTAT(RH_PS_PESC);
1117                         OK(0);
1118                 case (RH_C_PORT_SUSPEND):
1119                         WR_RH_PORTSTAT(RH_PS_PSSC);
1120                         OK(0);
1121                 case (RH_C_PORT_OVER_CURRENT):
1122                         WR_RH_PORTSTAT(RH_PS_OCIC);
1123                         OK(0);
1124                 case (RH_C_PORT_RESET):
1125                         WR_RH_PORTSTAT(RH_PS_PRSC);
1126                         OK(0);
1127                 }
1128                 break;
1129
1130         case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
1131                 switch (wValue) {
1132                 case (RH_PORT_SUSPEND):
1133                         WR_RH_PORTSTAT(RH_PS_PSS);
1134                         OK(0);
1135                 case (RH_PORT_RESET):   /* BUG IN HUP CODE ******** */
1136                         if (RD_RH_PORTSTAT & RH_PS_CCS)
1137                                 WR_RH_PORTSTAT(RH_PS_PRS);
1138                         OK(0);
1139                 case (RH_PORT_POWER):
1140                         WR_RH_PORTSTAT(RH_PS_PPS);
1141                         OK(0);
1142                 case (RH_PORT_ENABLE):  /* BUG IN HUP CODE ******** */
1143                         if (RD_RH_PORTSTAT & RH_PS_CCS)
1144                                 WR_RH_PORTSTAT(RH_PS_PES);
1145                         OK(0);
1146                 }
1147                 break;
1148
1149         case RH_SET_ADDRESS:
1150                 gohci.rh.devnum = wValue;
1151                 OK(0);
1152
1153         case RH_GET_DESCRIPTOR:
1154                 switch ((wValue & 0xff00) >> 8) {
1155                 case (0x01):    /* device descriptor */
1156                         len = min_t(unsigned int,
1157                                     leni,
1158                                     min_t(unsigned int,
1159                                           sizeof(root_hub_dev_des), wLength));
1160                         data_buf = root_hub_dev_des;
1161                         OK(len);
1162                 case (0x02):    /* configuration descriptor */
1163                         len = min_t(unsigned int,
1164                                     leni,
1165                                     min_t(unsigned int,
1166                                           sizeof(root_hub_config_des),
1167                                           wLength));
1168                         data_buf = root_hub_config_des;
1169                         OK(len);
1170                 case (0x03):    /* string descriptors */
1171                         if (wValue == 0x0300) {
1172                                 len = min_t(unsigned int,
1173                                             leni,
1174                                             min_t(unsigned int,
1175                                                   sizeof(root_hub_str_index0),
1176                                                   wLength));
1177                                 data_buf = root_hub_str_index0;
1178                                 OK(len);
1179                         }
1180                         if (wValue == 0x0301) {
1181                                 len = min_t(unsigned int,
1182                                             leni,
1183                                             min_t(unsigned int,
1184                                                   sizeof(root_hub_str_index1),
1185                                                   wLength));
1186                                 data_buf = root_hub_str_index1;
1187                                 OK(len);
1188                         }
1189                 default:
1190                         stat = USB_ST_STALLED;
1191                 }
1192                 break;
1193
1194         case RH_GET_DESCRIPTOR | RH_CLASS:
1195                 {
1196                         __u32 temp = roothub_a(&gohci);
1197
1198                         data_buf[0] = 9;        /* min length; */
1199                         data_buf[1] = 0x29;
1200                         data_buf[2] = temp & RH_A_NDP;
1201                         data_buf[3] = 0;
1202                         if (temp & RH_A_PSM)
1203                                 /* per-port power switching? */
1204                                 data_buf[3] |= 0x1;
1205                         if (temp & RH_A_NOCP)
1206                                 /* no overcurrent reporting? */
1207                                 data_buf[3] |= 0x10;
1208                         else if (temp & RH_A_OCPM)
1209                                 /* per-port overcurrent reporting? */
1210                                 data_buf[3] |= 0x8;
1211
1212                         /* corresponds to data_buf[4-7] */
1213                         datab.word[1] = 0;
1214                         data_buf[5] = (temp & RH_A_POTPGT) >> 24;
1215                         temp = roothub_b(&gohci);
1216                         data_buf[7] = temp & RH_B_DR;
1217                         if (data_buf[2] < 7) {
1218                                 data_buf[8] = 0xff;
1219                         } else {
1220                                 data_buf[0] += 2;
1221                                 data_buf[8] = (temp & RH_B_DR) >> 8;
1222                                 data_buf[10] = data_buf[9] = 0xff;
1223                         }
1224
1225                         len = min_t(unsigned int, leni,
1226                                     min_t(unsigned int, data_buf[0], wLength));
1227                         OK(len);
1228                 }
1229
1230         case RH_GET_CONFIGURATION:
1231                 *(__u8 *) data_buf = 0x01;
1232                 OK(1);
1233
1234         case RH_SET_CONFIGURATION:
1235                 WR_RH_STAT(0x10000);
1236                 OK(0);
1237
1238         default:
1239                 dbg("unsupported root hub command");
1240                 stat = USB_ST_STALLED;
1241         }
1242
1243 #ifdef  DEBUG
1244         ohci_dump_roothub(&gohci, 1);
1245 #else
1246         mdelay(1);
1247 #endif
1248
1249         len = min_t(int, len, leni);
1250         if (data != data_buf)
1251                 memcpy(data, data_buf, len);
1252         dev->act_len = len;
1253         dev->status = stat;
1254
1255 #ifdef DEBUG
1256         if (transfer_len)
1257                 urb_priv.actual_length = transfer_len;
1258         pkt_print(dev, pipe, buffer, transfer_len, cmd, "RET(rh)",
1259                   0 /*usb_pipein(pipe) */);
1260 #else
1261         mdelay(1);
1262 #endif
1263
1264         return stat;
1265 }
1266
1267 /*-------------------------------------------------------------------------*/
1268
1269 /* common code for handling submit messages - used for all but root hub */
1270 /* accesses. */
1271 int submit_common_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1272                       int transfer_len, struct devrequest *setup, int interval)
1273 {
1274         int stat = 0;
1275         int maxsize = usb_maxpacket(dev, pipe);
1276         int timeout;
1277
1278         /* device pulled? Shortcut the action. */
1279         if (devgone == dev) {
1280                 dev->status = USB_ST_CRC_ERR;
1281                 return 0;
1282         }
1283 #ifdef DEBUG
1284         urb_priv.actual_length = 0;
1285         pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB",
1286                   usb_pipein(pipe));
1287 #else
1288         mdelay(1);
1289 #endif
1290         if (!maxsize) {
1291                 err("submit_common_message: pipesize for pipe %lx is zero",
1292                     pipe);
1293                 return -1;
1294         }
1295
1296         if (sohci_submit_job(dev, pipe, buffer, transfer_len, setup, interval) <
1297             0) {
1298                 err("sohci_submit_job failed");
1299                 return -1;
1300         }
1301
1302         mdelay(10);
1303         /* ohci_dump_status(&gohci); */
1304
1305         /* allow more time for a BULK device to react - some are slow */
1306 #define BULK_TO  5000           /* timeout in milliseconds */
1307         if (usb_pipebulk(pipe))
1308                 timeout = BULK_TO;
1309         else
1310                 timeout = 100;
1311
1312         /* wait for it to complete */
1313         for (;;) {
1314                 /* check whether the controller is done */
1315                 stat = hc_interrupt();
1316
1317                 if (stat < 0) {
1318                         stat = USB_ST_CRC_ERR;
1319                         break;
1320                 }
1321
1322                 /* NOTE: since we are not interrupt driven in U-Boot and always
1323                  * handle only one URB at a time, we cannot assume the
1324                  * transaction finished on the first successful return from
1325                  * hc_interrupt().. unless the flag for current URB is set,
1326                  * meaning that all TD's to/from device got actually
1327                  * transferred and processed. If the current URB is not
1328                  * finished we need to re-iterate this loop so as
1329                  * hc_interrupt() gets called again as there needs to be some
1330                  * more TD's to process still */
1331                 if ((stat >= 0) && (stat != 0xff) && (urb_finished)) {
1332                         /* 0xff is returned for an SF-interrupt */
1333                         break;
1334                 }
1335
1336                 if (--timeout) {
1337                         mdelay(1);
1338                         if (!urb_finished)
1339                                 dbg("\%");
1340
1341                 } else {
1342                         err("CTL:TIMEOUT ");
1343                         dbg("submit_common_msg: TO status %x\n", stat);
1344                         stat = USB_ST_CRC_ERR;
1345                         urb_finished = 1;
1346                         break;
1347                 }
1348         }
1349
1350 #if 0
1351         /* we got an Root Hub Status Change interrupt */
1352         if (got_rhsc) {
1353 #ifdef DEBUG
1354                 ohci_dump_roothub(&gohci, 1);
1355 #endif
1356                 got_rhsc = 0;
1357                 /* abuse timeout */
1358                 timeout = rh_check_port_status(&gohci);
1359                 if (timeout >= 0) {
1360 #if 0                   /* this does nothing useful, but leave it here
1361                            in case that changes */
1362                         /* the called routine adds 1 to the passed value */
1363                         usb_hub_port_connect_change(gohci.rh.dev, timeout - 1);
1364 #endif
1365                         /*
1366                          * XXX
1367                          * This is potentially dangerous because it assumes
1368                          * that only one device is ever plugged in!
1369                          */
1370                         devgone = dev;
1371                 }
1372         }
1373 #endif
1374
1375         dev->status = stat;
1376         dev->act_len = transfer_len;
1377
1378 #ifdef DEBUG
1379         pkt_print(dev, pipe, buffer, transfer_len, setup, "RET(ctlr)",
1380                   usb_pipein(pipe));
1381 #else
1382         mdelay(1);
1383 #endif
1384
1385         /* free TDs in urb_priv */
1386         urb_free_priv(&urb_priv);
1387         return 0;
1388 }
1389
1390 /* submit routines called from usb.c */
1391 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1392                     int transfer_len)
1393 {
1394         info("submit_bulk_msg");
1395         return submit_common_msg(dev, pipe, buffer, transfer_len, NULL, 0);
1396 }
1397
1398 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1399                        int transfer_len, struct devrequest *setup)
1400 {
1401         int maxsize = usb_maxpacket(dev, pipe);
1402
1403         info("submit_control_msg");
1404 #ifdef DEBUG
1405         urb_priv.actual_length = 0;
1406         pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB",
1407                   usb_pipein(pipe));
1408 #else
1409         mdelay(1);
1410 #endif
1411         if (!maxsize) {
1412                 err("submit_control_message: pipesize for pipe %lx is zero",
1413                     pipe);
1414                 return -1;
1415         }
1416         if (((pipe >> 8) & 0x7f) == gohci.rh.devnum) {
1417                 gohci.rh.dev = dev;
1418                 /* root hub - redirect */
1419                 return ohci_submit_rh_msg(dev, pipe, buffer, transfer_len,
1420                                           setup);
1421         }
1422
1423         return submit_common_msg(dev, pipe, buffer, transfer_len, setup, 0);
1424 }
1425
1426 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1427                    int transfer_len, int interval)
1428 {
1429         info("submit_int_msg");
1430         return -1;
1431 }
1432
1433 /*-------------------------------------------------------------------------*
1434  * HC functions
1435  *-------------------------------------------------------------------------*/
1436
1437 /* reset the HC and BUS */
1438
1439 static int hc_reset(struct ohci *ohci)
1440 {
1441         int timeout = 30;
1442         int smm_timeout = 50;   /* 0,5 sec */
1443
1444         if (readl(&ohci->regs->control) & OHCI_CTRL_IR) {
1445                 /* SMM owns the HC - request ownership */
1446                 writel(OHCI_OCR, &ohci->regs->cmdstatus);
1447                 info("USB HC TakeOver from SMM");
1448                 while (readl(&ohci->regs->control) & OHCI_CTRL_IR) {
1449                         mdelay(10);
1450                         if (--smm_timeout == 0) {
1451                                 err("USB HC TakeOver failed!");
1452                                 return -1;
1453                         }
1454                 }
1455         }
1456
1457         /* Disable HC interrupts */
1458         writel(OHCI_INTR_MIE, &ohci->regs->intrdisable);
1459
1460         dbg("USB HC reset_hc usb-%s: ctrl = 0x%X ;",
1461             ohci->slot_name, readl(&ohci->regs->control));
1462
1463         /* Reset USB (needed by some controllers) */
1464         writel(0, &ohci->regs->control);
1465
1466         /* HC Reset requires max 10 us delay */
1467         writel(OHCI_HCR, &ohci->regs->cmdstatus);
1468         while ((readl(&ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
1469                 if (--timeout == 0) {
1470                         err("USB HC reset timed out!");
1471                         return -1;
1472                 }
1473                 udelay(1);
1474         }
1475         return 0;
1476 }
1477
1478 /*-------------------------------------------------------------------------*/
1479
1480 /* Start an OHCI controller, set the BUS operational
1481  * enable interrupts
1482  * connect the virtual root hub */
1483
1484 static int hc_start(struct ohci *ohci)
1485 {
1486         __u32 mask;
1487         unsigned int fminterval;
1488
1489         ohci->disabled = 1;
1490
1491         /* Tell the controller where the control and bulk lists are
1492          * The lists are empty now. */
1493
1494         writel(0, &ohci->regs->ed_controlhead);
1495         writel(0, &ohci->regs->ed_bulkhead);
1496
1497         /* a reset clears this */
1498         writel((__u32) ohci->hcca, &ohci->regs->hcca);
1499
1500         fminterval = 0x2edf;
1501         writel((fminterval * 9) / 10, &ohci->regs->periodicstart);
1502         fminterval |= ((((fminterval - 210) * 6) / 7) << 16);
1503         writel(fminterval, &ohci->regs->fminterval);
1504         writel(0x628, &ohci->regs->lsthresh);
1505
1506         /* start controller operations */
1507         ohci->hc_control = OHCI_CONTROL_INIT | OHCI_USB_OPER;
1508         ohci->disabled = 0;
1509         writel(ohci->hc_control, &ohci->regs->control);
1510
1511         /* disable all interrupts */
1512         mask = (OHCI_INTR_SO | OHCI_INTR_WDH | OHCI_INTR_SF | OHCI_INTR_RD |
1513                 OHCI_INTR_UE | OHCI_INTR_FNO | OHCI_INTR_RHSC |
1514                 OHCI_INTR_OC | OHCI_INTR_MIE);
1515         writel(mask, &ohci->regs->intrdisable);
1516         /* clear all interrupts */
1517         mask &= ~OHCI_INTR_MIE;
1518         writel(mask, &ohci->regs->intrstatus);
1519         /* Choose the interrupts we care about now  - but w/o MIE */
1520         mask = OHCI_INTR_RHSC | OHCI_INTR_UE | OHCI_INTR_WDH | OHCI_INTR_SO;
1521         writel(mask, &ohci->regs->intrenable);
1522
1523 #ifdef  OHCI_USE_NPS
1524         /* required for AMD-756 and some Mac platforms */
1525         writel((roothub_a(ohci) | RH_A_NPS) & ~RH_A_PSM,
1526                &ohci->regs->roothub.a);
1527         writel(RH_HS_LPSC, &ohci->regs->roothub.status);
1528 #endif /* OHCI_USE_NPS */
1529
1530         /* POTPGT delay is bits 24-31, in 2 ms units. */
1531         mdelay((roothub_a(ohci) >> 23) & 0x1fe);
1532
1533         /* connect the virtual root hub */
1534         ohci->rh.devnum = 0;
1535
1536         return 0;
1537 }
1538
1539 /*-------------------------------------------------------------------------*/
1540
1541 /* an interrupt happens */
1542
1543 static int hc_interrupt(void)
1544 {
1545         struct ohci *ohci = &gohci;
1546         struct ohci_regs *regs = ohci->regs;
1547         int ints;
1548         int stat = -1;
1549
1550         if ((ohci->hcca->done_head != 0) &&
1551             !(m32_swap(ohci->hcca->done_head) & 0x01)) {
1552
1553                 ints = OHCI_INTR_WDH;
1554
1555         } else {
1556                 ints = readl(&regs->intrstatus);
1557                 if (ints == ~(u32) 0) {
1558                         ohci->disabled++;
1559                         err("%s device removed!", ohci->slot_name);
1560                         return -1;
1561                 }
1562                 ints &= readl(&regs->intrenable);
1563                 if (ints == 0) {
1564                         dbg("hc_interrupt: returning..\n");
1565                         return 0xff;
1566                 }
1567         }
1568
1569         /* dbg("Interrupt: %x frame: %x", ints,
1570             le16_to_cpu(ohci->hcca->frame_no)); */
1571
1572         if (ints & OHCI_INTR_RHSC) {
1573                 got_rhsc = 1;
1574                 stat = 0xff;
1575         }
1576
1577         if (ints & OHCI_INTR_UE) {
1578                 ohci->disabled++;
1579                 err("OHCI Unrecoverable Error, controller usb-%s disabled",
1580                     ohci->slot_name);
1581                 /* e.g. due to PCI Master/Target Abort */
1582
1583 #ifdef  DEBUG
1584                 ohci_dump(ohci, 1);
1585 #else
1586                 mdelay(1);
1587 #endif
1588                 /* FIXME: be optimistic, hope that bug won't repeat often. */
1589                 /* Make some non-interrupt context restart the controller. */
1590                 /* Count and limit the retries though; either hardware or */
1591                 /* software errors can go forever... */
1592                 hc_reset(ohci);
1593                 return -1;
1594         }
1595
1596         if (ints & OHCI_INTR_WDH) {
1597                 mdelay(1);
1598
1599                 writel(OHCI_INTR_WDH, &regs->intrdisable);
1600                 stat = dl_done_list(&gohci, dl_reverse_done_list(&gohci));
1601                 writel(OHCI_INTR_WDH, &regs->intrenable);
1602         }
1603
1604         if (ints & OHCI_INTR_SO) {
1605                 dbg("USB Schedule overrun\n");
1606                 writel(OHCI_INTR_SO, &regs->intrenable);
1607                 stat = -1;
1608         }
1609
1610         /* FIXME:  this assumes SOF (1/ms) interrupts don't get lost... */
1611         if (ints & OHCI_INTR_SF) {
1612                 unsigned int frame = m16_swap(ohci->hcca->frame_no) & 1;
1613                 mdelay(1);
1614                 writel(OHCI_INTR_SF, &regs->intrdisable);
1615                 if (ohci->ed_rm_list[frame] != NULL)
1616                         writel(OHCI_INTR_SF, &regs->intrenable);
1617                 stat = 0xff;
1618         }
1619
1620         writel(ints, &regs->intrstatus);
1621         return stat;
1622 }
1623
1624 /*-------------------------------------------------------------------------*/
1625
1626 /*-------------------------------------------------------------------------*/
1627
1628 /* De-allocate all resources.. */
1629
1630 static void hc_release_ohci(struct ohci *ohci)
1631 {
1632         dbg("USB HC release ohci usb-%s", ohci->slot_name);
1633
1634         if (!ohci->disabled)
1635                 hc_reset(ohci);
1636 }
1637
1638 /*-------------------------------------------------------------------------*/
1639
1640 /*
1641  * low level initalisation routine, called from usb.c
1642  */
1643 static char ohci_inited = 0;
1644
1645 int usb_lowlevel_init(int index, void **controller)
1646 {
1647         struct s3c24x0_clock_power *clk_power = s3c24x0_get_base_clock_power();
1648         struct s3c24x0_gpio *gpio = s3c24x0_get_base_gpio();
1649
1650         /*
1651          * Set the 48 MHz UPLL clocking. Values are taken from
1652          * "PLL value selection guide", 6-23, s3c2400_UM.pdf.
1653          */
1654         clk_power->upllcon = ((40 << 12) + (1 << 4) + 2);
1655         gpio->misccr |= 0x8;    /* 1 = use pads related USB for USB host */
1656
1657         /*
1658          * Enable USB host clock.
1659          */
1660         clk_power->clkcon |= (1 << 4);
1661
1662         memset(&gohci, 0, sizeof(struct ohci));
1663         memset(&urb_priv, 0, sizeof(struct urb_priv));
1664
1665         /* align the storage */
1666         if ((__u32) &ghcca[0] & 0xff) {
1667                 err("HCCA not aligned!!");
1668                 return -1;
1669         }
1670         phcca = &ghcca[0];
1671         info("aligned ghcca %p", phcca);
1672         memset(&ohci_dev, 0, sizeof(struct ohci_device));
1673         if ((__u32) &ohci_dev.ed[0] & 0x7) {
1674                 err("EDs not aligned!!");
1675                 return -1;
1676         }
1677         memset(gtd, 0, sizeof(struct td) * (NUM_TD + 1));
1678         if ((__u32) gtd & 0x7) {
1679                 err("TDs not aligned!!");
1680                 return -1;
1681         }
1682         ptd = gtd;
1683         gohci.hcca = phcca;
1684         memset(phcca, 0, sizeof(struct ohci_hcca));
1685
1686         gohci.disabled = 1;
1687         gohci.sleeping = 0;
1688         gohci.irq = -1;
1689         gohci.regs = (struct ohci_regs *)S3C24X0_USB_HOST_BASE;
1690
1691         gohci.flags = 0;
1692         gohci.slot_name = "s3c2400";
1693
1694         if (hc_reset(&gohci) < 0) {
1695                 hc_release_ohci(&gohci);
1696                 /* Initialization failed */
1697                 clk_power->clkcon &= ~(1 << 4);
1698                 return -1;
1699         }
1700
1701         /* FIXME this is a second HC reset; why?? */
1702         gohci.hc_control = OHCI_USB_RESET;
1703         writel(gohci.hc_control, &gohci.regs->control);
1704         mdelay(10);
1705
1706         if (hc_start(&gohci) < 0) {
1707                 err("can't start usb-%s", gohci.slot_name);
1708                 hc_release_ohci(&gohci);
1709                 /* Initialization failed */
1710                 clk_power->clkcon &= ~(1 << 4);
1711                 return -1;
1712         }
1713 #ifdef  DEBUG
1714         ohci_dump(&gohci, 1);
1715 #else
1716         mdelay(1);
1717 #endif
1718         ohci_inited = 1;
1719         urb_finished = 1;
1720
1721         return 0;
1722 }
1723
1724 int usb_lowlevel_stop(int index)
1725 {
1726         struct s3c24x0_clock_power *clk_power = s3c24x0_get_base_clock_power();
1727
1728         /* this gets called really early - before the controller has */
1729         /* even been initialized! */
1730         if (!ohci_inited)
1731                 return 0;
1732         /* TODO release any interrupts, etc. */
1733         /* call hc_release_ohci() here ? */
1734         hc_reset(&gohci);
1735         /* may not want to do this */
1736         clk_power->clkcon &= ~(1 << 4);
1737         return 0;
1738 }
1739
1740 #endif /* defined(CONFIG_USB_OHCI) && defined(CONFIG_S3C24X0) */
1741
1742 #if defined(CONFIG_USB_OHCI_NEW) && \
1743     defined(CONFIG_SYS_USB_OHCI_CPU_INIT) && \
1744     defined(CONFIG_S3C24X0)
1745
1746 int usb_cpu_init(void)
1747 {
1748         struct s3c24x0_clock_power *clk_power = s3c24x0_get_base_clock_power();
1749         struct s3c24x0_gpio *gpio = s3c24x0_get_base_gpio();
1750
1751         /*
1752          * Set the 48 MHz UPLL clocking. Values are taken from
1753          * "PLL value selection guide", 6-23, s3c2400_UM.pdf.
1754          */
1755         writel((40 << 12) + (1 << 4) + 2, &clk_power->upllcon);
1756         /* 1 = use pads related USB for USB host */
1757         writel(readl(&gpio->misccr) | 0x8, &gpio->misccr);
1758
1759         /*
1760          * Enable USB host clock.
1761          */
1762         writel(readl(&clk_power->clkcon) | (1 << 4), &clk_power->clkcon);
1763
1764         return 0;
1765 }
1766
1767 int usb_cpu_stop(void)
1768 {
1769         struct s3c24x0_clock_power *clk_power = s3c24x0_get_base_clock_power();
1770         /* may not want to do this */
1771         writel(readl(&clk_power->clkcon) & ~(1 << 4), &clk_power->clkcon);
1772         return 0;
1773 }
1774
1775 int usb_cpu_init_fail(void)
1776 {
1777         struct s3c24x0_clock_power *clk_power = s3c24x0_get_base_clock_power();
1778         writel(readl(&clk_power->clkcon) & ~(1 << 4), &clk_power->clkcon);
1779         return 0;
1780 }
1781
1782 #endif /* defined(CONFIG_USB_OHCI_NEW) && \
1783            defined(CONFIG_SYS_USB_OHCI_CPU_INIT) && \
1784            defined(CONFIG_S3C24X0) */