arch/arm/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 <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  * 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 - this driver is intended for use with USB Mass Storage Devices
  33  *     (BBB) ONLY. There is NO support for Interrupt or Isochronous pipes!
  34  */
  35
  36 #include <common.h>
  37 /* #include <pci.h> no PCI on the S3C24X0 */
  38
  39 #if defined(CONFIG_USB_OHCI) && defined(CONFIG_S3C24X0)
  40
  41 #include <asm/arch/s3c24x0_cpu.h>
  42 #include <asm/io.h>
  43 #include <malloc.h>
  44 #include <usb.h>
  45 #include "usb_ohci.h"
  46
  47 #define OHCI_USE_NPS            /* force NoPowerSwitching mode */
  48 #undef OHCI_VERBOSE_DEBUG       /* not always helpful */
  49
  50
  51 /* For initializing controller (mask in an HCFS mode too) */
  52 #define OHCI_CONTROL_INIT \
  53         (OHCI_CTRL_CBSR & 0x3) | OHCI_CTRL_IE | OHCI_CTRL_PLE
  54
  55 #define min_t(type, x, y) \
  56         ({ type __x = (x); type __y = (y); __x < __y ? __x : __y; })
  57
  58 #undef DEBUG
  59 #ifdef DEBUG
  60 #define dbg(format, arg...) printf("DEBUG: " format "\n", ## arg)
  61 #else
  62 #define dbg(format, arg...) do {} while(0)
  63 #endif /* DEBUG */
  64 #define err(format, arg...) printf("ERROR: " format "\n", ## arg)
  65 #undef SHOW_INFO
  66 #ifdef SHOW_INFO
  67 #define info(format, arg...) printf("INFO: " format "\n", ## arg)
  68 #else
  69 #define info(format, arg...) do {} while(0)
  70 #endif
  71
  72 #define m16_swap(x) swap_16(x)
  73 #define m32_swap(x) swap_32(x)
  74
  75 /* global struct ohci */
  76 static struct ohci gohci;
  77 /* this must be aligned to a 256 byte boundary */
  78 struct ohci_hcca ghcca[1];
  79 /* a pointer to the aligned storage */
  80 struct ohci_hcca *phcca;
  81 /* this allocates EDs for all possible endpoints */
  82 struct ohci_device ohci_dev;
  83 /* urb_priv */
  84 struct urb_priv urb_priv;
  85 /* RHSC flag */
  86 int got_rhsc;
  87 /* device which was disconnected */
  88 struct usb_device *devgone;
  89 /* flag guarding URB transation */
  90 int urb_finished = 0;
  91
  92 /*-------------------------------------------------------------------------*/
  93
  94 /* AMD-756 (D2 rev) reports corrupt register contents in some cases.
  95  * The erratum (#4) description is incorrect.  AMD's workaround waits
  96  * till some bits (mostly reserved) are clear; ok for all revs.
  97  */
  98 #define OHCI_QUIRK_AMD756 0xabcd
  99 #define read_roothub(hc, register, mask) ({ \
 100         u32 temp = readl (&hc->regs->roothub.register); \
 101         if (hc->flags & OHCI_QUIRK_AMD756) \
 102                 while (temp & mask) \
 103                         temp = readl (&hc->regs->roothub.register); \
 104         temp; })
 105
 106 static u32 roothub_a(struct ohci *hc)
 107 {
 108         return read_roothub(hc, a, 0xfc0fe000);
 109 }
 110 static inline u32 roothub_b(struct ohci *hc)
 111 {
 112         return readl(&hc->regs->roothub.b);
 113 }
 114 static inline u32 roothub_status(struct ohci *hc)
 115 {
 116         return readl(&hc->regs->roothub.status);
 117 }
 118 static u32 roothub_portstatus(struct ohci *hc, int i)
 119 {
 120         return read_roothub(hc, portstatus[i], 0xffe0fce0);
 121 }
 122
 123 /* forward declaration */
 124 static int hc_interrupt(void);
 125 static void td_submit_job(struct usb_device *dev, unsigned long pipe,
 126                           void *buffer, int transfer_len,
 127                           struct devrequest *setup, struct urb_priv *urb,
 128                           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(struct urb_priv *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,
 164                       int small)
 165 {
 166         struct urb_priv *purb = &urb_priv;
 167
 168         dbg("%s URB:[%4x] dev:%2d,ep:%2d-%c,type:%s,len:%d/%d stat:%#lx",
 169             str,
 170             sohci_get_current_frame_number(dev),
 171             usb_pipedevice(pipe),
 172             usb_pipeendpoint(pipe),
 173             usb_pipeout(pipe) ? 'O' : 'I',
 174             usb_pipetype(pipe) < 2 ?
 175                 (usb_pipeint(pipe) ? "INTR" : "ISOC") :
 176                 (usb_pipecontrol(pipe) ? "CTRL" : "BULK"),
 177             purb->actual_length, transfer_len, dev->status);
 178 #ifdef  OHCI_VERBOSE_DEBUG
 179         if (!small) {
 180                 int i, len;
 181
 182                 if (usb_pipecontrol(pipe)) {
 183                         printf(__FILE__ ": cmd(8):");
 184                         for (i = 0; i < 8; i++)
 185                                 printf(" %02x", ((__u8 *) setup)[i]);
 186                         printf("\n");
 187                 }
 188                 if (transfer_len > 0 && buffer) {
 189                         printf(__FILE__ ": data(%d/%d):",
 190                                purb->actual_length, 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
 202    int ed tree inclusive iso eds*/
 203 void ep_print_int_eds(struct ohci *ohci, char *str)
 204 {
 205         int i, j;
 206         __u32 *ed_p;
 207         for (i = 0; i < 32; i++) {
 208                 j = 5;
 209                 ed_p = &(ohci->hcca->int_table[i]);
 210                 if (*ed_p == 0)
 211                         continue;
 212                 printf(__FILE__ ": %s branch int %2d(%2x):", str, i, i);
 213                 while (*ed_p != 0 && j--) {
 214                         struct ed *ed = (struct ed *) m32_swap(ed_p);
 215                         printf(" ed: %4x;", ed->hwINFO);
 216                         ed_p = &ed->hwNextED;
 217                 }
 218                 printf("\n");
 219         }
 220 }
 221
 222 static void ohci_dump_intr_mask(char *label, __u32 mask)
 223 {
 224         dbg("%s: 0x%08x%s%s%s%s%s%s%s%s%s",
 225             label,
 226             mask,
 227             (mask & OHCI_INTR_MIE) ? " MIE" : "",
 228             (mask & OHCI_INTR_OC) ? " OC" : "",
 229             (mask & OHCI_INTR_RHSC) ? " RHSC" : "",
 230             (mask & OHCI_INTR_FNO) ? " FNO" : "",
 231             (mask & OHCI_INTR_UE) ? " UE" : "",
 232             (mask & OHCI_INTR_RD) ? " RD" : "",
 233             (mask & OHCI_INTR_SF) ? " SF" : "",
 234             (mask & OHCI_INTR_WDH) ? " WDH" : "",
 235             (mask & OHCI_INTR_SO) ? " SO" : "");
 236 }
 237
 238 static void maybe_print_eds(char *label, __u32 value)
 239 {
 240         struct ed *edp = (struct ed *) value;
 241
 242         if (value) {
 243                 dbg("%s %08x", label, value);
 244                 dbg("%08x", edp->hwINFO);
 245                 dbg("%08x", edp->hwTailP);
 246                 dbg("%08x", edp->hwHeadP);
 247                 dbg("%08x", edp->hwNextED);
 248         }
 249 }
 250
 251 static char *hcfs2string(int state)
 252 {
 253         switch (state) {
 254         case OHCI_USB_RESET:
 255                 return "reset";
 256         case OHCI_USB_RESUME:
 257                 return "resume";
 258         case OHCI_USB_OPER:
 259                 return "operational";
 260         case OHCI_USB_SUSPEND:
 261                 return "suspend";
 262         }
 263         return "?";
 264 }
 265
 266 /* dump control and status registers */
 267 static void ohci_dump_status(struct ohci *controller)
 268 {
 269         struct ohci_regs *regs = controller->regs;
 270         __u32 temp;
 271
 272         temp = readl(&regs->revision) & 0xff;
 273         if (temp != 0x10)
 274                 dbg("spec %d.%d", (temp >> 4), (temp & 0x0f));
 275
 276         temp = readl(&regs->control);
 277         dbg("control: 0x%08x%s%s%s HCFS=%s%s%s%s%s CBSR=%d", temp,
 278             (temp & OHCI_CTRL_RWE) ? " RWE" : "",
 279             (temp & OHCI_CTRL_RWC) ? " RWC" : "",
 280             (temp & OHCI_CTRL_IR) ? " IR" : "",
 281             hcfs2string(temp & OHCI_CTRL_HCFS),
 282             (temp & OHCI_CTRL_BLE) ? " BLE" : "",
 283             (temp & OHCI_CTRL_CLE) ? " CLE" : "",
 284             (temp & OHCI_CTRL_IE) ? " IE" : "",
 285             (temp & OHCI_CTRL_PLE) ? " PLE" : "", temp & OHCI_CTRL_CBSR);
 286
 287         temp = readl(&regs->cmdstatus);
 288         dbg("cmdstatus: 0x%08x SOC=%d%s%s%s%s", temp,
 289             (temp & OHCI_SOC) >> 16,
 290             (temp & OHCI_OCR) ? " OCR" : "",
 291             (temp & OHCI_BLF) ? " BLF" : "",
 292             (temp & OHCI_CLF) ? " CLF" : "", (temp & OHCI_HCR) ? " HCR" : "");
 293
 294         ohci_dump_intr_mask("intrstatus", readl(&regs->intrstatus));
 295         ohci_dump_intr_mask("intrenable", readl(&regs->intrenable));
 296
 297         maybe_print_eds("ed_periodcurrent", readl(&regs->ed_periodcurrent));
 298
 299         maybe_print_eds("ed_controlhead", readl(&regs->ed_controlhead));
 300         maybe_print_eds("ed_controlcurrent", readl(&regs->ed_controlcurrent));
 301
 302         maybe_print_eds("ed_bulkhead", readl(&regs->ed_bulkhead));
 303         maybe_print_eds("ed_bulkcurrent", readl(&regs->ed_bulkcurrent));
 304
 305         maybe_print_eds("donehead", readl(&regs->donehead));
 306 }
 307
 308 static void ohci_dump_roothub(struct ohci *controller, int verbose)
 309 {
 310         __u32 temp, ndp, i;
 311
 312         temp = roothub_a(controller);
 313         ndp = (temp & RH_A_NDP);
 314
 315         if (verbose) {
 316                 dbg("roothub.a: %08x POTPGT=%d%s%s%s%s%s NDP=%d", temp,
 317                     ((temp & RH_A_POTPGT) >> 24) & 0xff,
 318                     (temp & RH_A_NOCP) ? " NOCP" : "",
 319                     (temp & RH_A_OCPM) ? " OCPM" : "",
 320                     (temp & RH_A_DT) ? " DT" : "",
 321                     (temp & RH_A_NPS) ? " NPS" : "",
 322                     (temp & RH_A_PSM) ? " PSM" : "", ndp);
 323                 temp = roothub_b(controller);
 324                 dbg("roothub.b: %08x PPCM=%04x DR=%04x",
 325                     temp, (temp & RH_B_PPCM) >> 16, (temp & RH_B_DR)
 326                     );
 327                 temp = roothub_status(controller);
 328                 dbg("roothub.status: %08x%s%s%s%s%s%s",
 329                     temp,
 330                     (temp & RH_HS_CRWE) ? " CRWE" : "",
 331                     (temp & RH_HS_OCIC) ? " OCIC" : "",
 332                     (temp & RH_HS_LPSC) ? " LPSC" : "",
 333                     (temp & RH_HS_DRWE) ? " DRWE" : "",
 334                     (temp & RH_HS_OCI) ? " OCI" : "",
 335                     (temp & RH_HS_LPS) ? " LPS" : "");
 336         }
 337
 338         for (i = 0; i < ndp; i++) {
 339                 temp = roothub_portstatus(controller, i);
 340                 dbg("roothub.portstatus [%d] = 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s",
 341                     i,
 342                     temp,
 343                     (temp & RH_PS_PRSC) ? " PRSC" : "",
 344                     (temp & RH_PS_OCIC) ? " OCIC" : "",
 345                     (temp & RH_PS_PSSC) ? " PSSC" : "",
 346                     (temp & RH_PS_PESC) ? " PESC" : "",
 347                     (temp & RH_PS_CSC) ? " CSC" : "",
 348                     (temp & RH_PS_LSDA) ? " LSDA" : "",
 349                     (temp & RH_PS_PPS) ? " PPS" : "",
 350                     (temp & RH_PS_PRS) ? " PRS" : "",
 351                     (temp & RH_PS_POCI) ? " POCI" : "",
 352                     (temp & RH_PS_PSS) ? " PSS" : "",
 353                     (temp & RH_PS_PES) ? " PES" : "",
 354                     (temp & RH_PS_CCS) ? " CCS" : "");
 355         }
 356 }
 357
 358 static void ohci_dump(struct ohci *controller, int verbose)
 359 {
 360         dbg("OHCI controller usb-%s state", controller->slot_name);
 361
 362         /* dumps some of the state we know about */
 363         ohci_dump_status(controller);
 364         if (verbose)
 365                 ep_print_int_eds(controller, "hcca");
 366         dbg("hcca frame #%04x", controller->hcca->frame_no);
 367         ohci_dump_roothub(controller, 1);
 368 }
 369
 370 #endif /* DEBUG */
 371
 372 /*-------------------------------------------------------------------------*
 373  * Interface functions (URB)
 374  *-------------------------------------------------------------------------*/
 375
 376 /* get a transfer request */
 377
 378 int sohci_submit_job(struct usb_device *dev, unsigned long pipe, void *buffer,
 379                      int transfer_len, struct devrequest *setup, int interval)
 380 {
 381         struct ohci *ohci;
 382         struct ed *ed;
 383         struct urb_priv *purb_priv;
 384         int i, size = 0;
 385
 386         ohci = &gohci;
 387
 388         /* when controller's hung, permit only roothub cleanup attempts
 389          * such as powering down ports */
 390         if (ohci->disabled) {
 391                 err("sohci_submit_job: EPIPE");
 392                 return -1;
 393         }
 394
 395         /* if we have an unfinished URB from previous transaction let's
 396          * fail and scream as quickly as possible so as not to corrupt
 397          * further communication */
 398         if (!urb_finished) {
 399                 err("sohci_submit_job: URB NOT FINISHED");
 400                 return -1;
 401         }
 402         /* we're about to begin a new transaction here
 403            so mark the URB unfinished */
 404         urb_finished = 0;
 405
 406         /* every endpoint has a ed, locate and fill it */
 407         ed = ep_add_ed(dev, pipe);
 408         if (!ed) {
 409                 err("sohci_submit_job: ENOMEM");
 410                 return -1;
 411         }
 412
 413         /* for the private part of the URB we need the number of TDs (size) */
 414         switch (usb_pipetype(pipe)) {
 415         case PIPE_BULK:
 416                 /* one TD for every 4096 Byte */
 417                 size = (transfer_len - 1) / 4096 + 1;
 418                 break;
 419         case PIPE_CONTROL:
 420                 /* 1 TD for setup, 1 for ACK and 1 for every 4096 B */
 421                 size = (transfer_len == 0) ? 2 : (transfer_len - 1) / 4096 + 3;
 422                 break;
 423         }
 424
 425         if (size >= (N_URB_TD - 1)) {
 426                 err("need %d TDs, only have %d", size, N_URB_TD);
 427                 return -1;
 428         }
 429         purb_priv = &urb_priv;
 430         purb_priv->pipe = pipe;
 431
 432         /* fill the private part of the URB */
 433         purb_priv->length = size;
 434         purb_priv->ed = ed;
 435         purb_priv->actual_length = 0;
 436
 437         /* allocate the TDs */
 438         /* note that td[0] was allocated in ep_add_ed */
 439         for (i = 0; i < size; i++) {
 440                 purb_priv->td[i] = td_alloc(dev);
 441                 if (!purb_priv->td[i]) {
 442                         purb_priv->length = i;
 443                         urb_free_priv(purb_priv);
 444                         err("sohci_submit_job: ENOMEM");
 445                         return -1;
 446                 }
 447         }
 448
 449         if (ed->state == ED_NEW || (ed->state & ED_DEL)) {
 450                 urb_free_priv(purb_priv);
 451                 err("sohci_submit_job: EINVAL");
 452                 return -1;
 453         }
 454
 455         /* link the ed into a chain if is not already */
 456         if (ed->state != ED_OPER)
 457                 ep_link(ohci, ed);
 458
 459         /* fill the TDs and link it to the ed */
 460         td_submit_job(dev, pipe, buffer, transfer_len, setup, purb_priv,
 461                       interval);
 462
 463         return 0;
 464 }
 465
 466 /*-------------------------------------------------------------------------*/
 467
 468 #ifdef DEBUG
 469 /* tell us the current USB frame number */
 470
 471 static int sohci_get_current_frame_number(struct usb_device *usb_dev)
 472 {
 473         struct ohci *ohci = &gohci;
 474
 475         return m16_swap(ohci->hcca->frame_no);
 476 }
 477 #endif
 478
 479 /*-------------------------------------------------------------------------*
 480  * ED handling functions
 481  *-------------------------------------------------------------------------*/
 482
 483 /* link an ed into one of the HC chains */
 484
 485 static int ep_link(struct ohci *ohci, struct ed *edi)
 486 {
 487         struct ed *ed = edi;
 488
 489         ed->state = ED_OPER;
 490
 491         switch (ed->type) {
 492         case PIPE_CONTROL:
 493                 ed->hwNextED = 0;
 494                 if (ohci->ed_controltail == NULL) {
 495                         writel((u32)ed, &ohci->regs->ed_controlhead);
 496                 } else {
 497                         ohci->ed_controltail->hwNextED = (__u32) m32_swap(ed);
 498                 }
 499                 ed->ed_prev = ohci->ed_controltail;
 500                 if (!ohci->ed_controltail && !ohci->ed_rm_list[0] &&
 501                     !ohci->ed_rm_list[1] && !ohci->sleeping) {
 502                         ohci->hc_control |= OHCI_CTRL_CLE;
 503                         writel(ohci->hc_control, &ohci->regs->control);
 504                 }
 505                 ohci->ed_controltail = edi;
 506                 break;
 507
 508         case PIPE_BULK:
 509                 ed->hwNextED = 0;
 510                 if (ohci->ed_bulktail == NULL) {
 511                         writel((u32)ed, &ohci->regs->ed_bulkhead);
 512                 } else {
 513                         ohci->ed_bulktail->hwNextED = (__u32) m32_swap(ed);
 514                 }
 515                 ed->ed_prev = ohci->ed_bulktail;
 516                 if (!ohci->ed_bulktail && !ohci->ed_rm_list[0] &&
 517                     !ohci->ed_rm_list[1] && !ohci->sleeping) {
 518                         ohci->hc_control |= OHCI_CTRL_BLE;
 519                         writel(ohci->hc_control, &ohci->regs->control);
 520                 }
 521                 ohci->ed_bulktail = edi;
 522                 break;
 523         }
 524         return 0;
 525 }
 526
 527 /*-------------------------------------------------------------------------*/
 528
 529 /* unlink an ed from one of the HC chains.
 530  * just the link to the ed is unlinked.
 531  * the link from the ed still points to another operational ed or 0
 532  * so the HC can eventually finish the processing of the unlinked ed */
 533
 534 static int ep_unlink(struct ohci *ohci, struct ed *ed)
 535 {
 536         struct ed *next;
 537         ed->hwINFO |= m32_swap(OHCI_ED_SKIP);
 538
 539         switch (ed->type) {
 540         case PIPE_CONTROL:
 541                 if (ed->ed_prev == NULL) {
 542                         if (!ed->hwNextED) {
 543                                 ohci->hc_control &= ~OHCI_CTRL_CLE;
 544                                 writel(ohci->hc_control, &ohci->regs->control);
 545                         }
 546                         writel(m32_swap(*((__u32 *) &ed->hwNextED)),
 547                                &ohci->regs->ed_controlhead);
 548                 } else {
 549                         ed->ed_prev->hwNextED = ed->hwNextED;
 550                 }
 551                 if (ohci->ed_controltail == ed) {
 552                         ohci->ed_controltail = ed->ed_prev;
 553                 } else {
 554                         next = (struct ed *)m32_swap(*((__u32 *)&ed->hwNextED));
 555                         next->ed_prev = ed->ed_prev;
 556                 }
 557                 break;
 558
 559         case PIPE_BULK:
 560                 if (ed->ed_prev == NULL) {
 561                         if (!ed->hwNextED) {
 562                                 ohci->hc_control &= ~OHCI_CTRL_BLE;
 563                                 writel(ohci->hc_control, &ohci->regs->control);
 564                         }
 565                         writel(m32_swap(*((__u32 *) &ed->hwNextED)),
 566                                &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                         next = (struct ed *)m32_swap(*((__u32 *)&ed->hwNextED));
 574                         next->ed_prev = ed->ed_prev;
 575                 }
 576                 break;
 577         }
 578         ed->state = ED_UNLINK;
 579         return 0;
 580 }
 581
 582 /*-------------------------------------------------------------------------*/
 583
 584 /* add/reinit an endpoint; this should be done once at the usb_set_configuration
 585  * command, but the USB stack is a little bit stateless  so we do it at every
 586  * transaction. If the state of the ed is ED_NEW then a dummy td is added and
 587  * the state is changed to ED_UNLINK. In all other cases the state is left
 588  * unchanged. The ed info fields are setted anyway even though most of them
 589  * should not change */
 590
 591 static struct ed *ep_add_ed(struct usb_device *usb_dev, unsigned long pipe)
 592 {
 593         struct td *td;
 594         struct ed *ed_ret;
 595         struct ed *ed;
 596
 597         ed = ed_ret = &ohci_dev.ed[(usb_pipeendpoint(pipe) << 1) |
 598                                    (usb_pipecontrol(pipe) ? 0 :
 599                                     usb_pipeout(pipe))];
 600
 601         if ((ed->state & ED_DEL) || (ed->state & ED_URB_DEL)) {
 602                 err("ep_add_ed: pending delete");
 603                 /* pending delete request */
 604                 return NULL;
 605         }
 606
 607         if (ed->state == ED_NEW) {
 608                 ed->hwINFO = m32_swap(OHCI_ED_SKIP);    /* skip ed */
 609                 /* dummy td; end of td list for ed */
 610                 td = td_alloc(usb_dev);
 611                 ed->hwTailP = (__u32) m32_swap(td);
 612                 ed->hwHeadP = ed->hwTailP;
 613                 ed->state = ED_UNLINK;
 614                 ed->type = usb_pipetype(pipe);
 615                 ohci_dev.ed_cnt++;
 616         }
 617
 618         ed->hwINFO = m32_swap(usb_pipedevice(pipe)
 619                               | usb_pipeendpoint(pipe) << 7
 620                               | (usb_pipeisoc(pipe) ? 0x8000 : 0)
 621                               | (usb_pipecontrol(pipe) ? 0 :
 622                                  (usb_pipeout(pipe) ? 0x800 : 0x1000))
 623                               | usb_pipeslow(pipe) << 13 |
 624                               usb_maxpacket(usb_dev, pipe) << 16);
 625
 626         return ed_ret;
 627 }
 628
 629 /*-------------------------------------------------------------------------*
 630  * TD handling functions
 631  *-------------------------------------------------------------------------*/
 632
 633 /* enqueue next TD for this URB (OHCI spec 5.2.8.2) */
 634
 635 static void td_fill(struct ohci *ohci, unsigned int info, void *data, int len,
 636                     struct usb_device *dev, int index,
 637                     struct urb_priv *urb_priv)
 638 {
 639         struct td *td, *td_pt;
 640 #ifdef OHCI_FILL_TRACE
 641         int i;
 642 #endif
 643
 644         if (index > urb_priv->length) {
 645                 err("index > length");
 646                 return;
 647         }
 648         /* use this td as the next dummy */
 649         td_pt = urb_priv->td[index];
 650         td_pt->hwNextTD = 0;
 651
 652         /* fill the old dummy TD */
 653         td = urb_priv->td[index] =
 654             (struct td *) (m32_swap(urb_priv->ed->hwTailP) & ~0xf);
 655
 656         td->ed = urb_priv->ed;
 657         td->next_dl_td = NULL;
 658         td->index = index;
 659         td->data = (__u32) data;
 660 #ifdef OHCI_FILL_TRACE
 661         if (usb_pipebulk(urb_priv->pipe) && usb_pipeout(urb_priv->pipe)) {
 662                 for (i = 0; i < len; i++)
 663                         printf("td->data[%d] %#2x ", i,
 664                                ((unsigned char *)td->data)[i]);
 665                 printf("\n");
 666         }
 667 #endif
 668         if (!len)
 669                 data = 0;
 670
 671         td->hwINFO = (__u32) m32_swap(info);
 672         td->hwCBP = (__u32) m32_swap(data);
 673         if (data)
 674                 td->hwBE = (__u32) m32_swap(data + len - 1);
 675         else
 676                 td->hwBE = 0;
 677         td->hwNextTD = (__u32) m32_swap(td_pt);
 678
 679         /* append to queue */
 680         td->ed->hwTailP = td->hwNextTD;
 681 }
 682
 683 /*-------------------------------------------------------------------------*/
 684
 685 /* prepare all TDs of a transfer */
 686
 687 static void td_submit_job(struct usb_device *dev, unsigned long pipe,
 688                           void *buffer, int transfer_len,
 689                           struct devrequest *setup, struct urb_priv *urb,
 690                           int interval)
 691 {
 692         struct ohci *ohci = &gohci;
 693         int data_len = transfer_len;
 694         void *data;
 695         int cnt = 0;
 696         __u32 info = 0;
 697         unsigned int toggle = 0;
 698
 699         /* OHCI handles the DATA-toggles itself, we just
 700            use the USB-toggle bits for reseting */
 701         if (usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe))) {
 702                 toggle = TD_T_TOGGLE;
 703         } else {
 704                 toggle = TD_T_DATA0;
 705                 usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe),
 706                               1);
 707         }
 708         urb->td_cnt = 0;
 709         if (data_len)
 710                 data = buffer;
 711         else
 712                 data = 0;
 713
 714         switch (usb_pipetype(pipe)) {
 715         case PIPE_BULK:
 716                 info = usb_pipeout(pipe) ? TD_CC | TD_DP_OUT : TD_CC | TD_DP_IN;
 717                 while (data_len > 4096) {
 718                         td_fill(ohci, info | (cnt ? TD_T_TOGGLE : toggle), data,
 719                                 4096, dev, cnt, urb);
 720                         data += 4096;
 721                         data_len -= 4096;
 722                         cnt++;
 723                 }
 724                 info = usb_pipeout(pipe) ?
 725                                 TD_CC | TD_DP_OUT :
 726                                 TD_CC | TD_R | TD_DP_IN;
 727                 td_fill(ohci, info | (cnt ? TD_T_TOGGLE : toggle), data,
 728                         data_len, dev, cnt, urb);
 729                 cnt++;
 730
 731                 if (!ohci->sleeping)
 732                         /* start bulk list */
 733                         writel(OHCI_BLF, &ohci->regs->cmdstatus);
 734                 break;
 735
 736         case PIPE_CONTROL:
 737                 info = TD_CC | TD_DP_SETUP | TD_T_DATA0;
 738                 td_fill(ohci, info, setup, 8, dev, cnt++, urb);
 739                 if (data_len > 0) {
 740                         info = usb_pipeout(pipe) ?
 741                             TD_CC | TD_R | TD_DP_OUT | TD_T_DATA1 :
 742                             TD_CC | TD_R | TD_DP_IN | TD_T_DATA1;
 743                         /* NOTE:  mishandles transfers >8K, some >4K */
 744                         td_fill(ohci, info, data, data_len, dev, cnt++, urb);
 745                 }
 746                 info = usb_pipeout(pipe) ?
 747                     TD_CC | TD_DP_IN | TD_T_DATA1 :
 748                     TD_CC | TD_DP_OUT | TD_T_DATA1;
 749                 td_fill(ohci, info, data, 0, dev, cnt++, urb);
 750                 if (!ohci->sleeping)
 751                         /* start Control list */
 752                         writel(OHCI_CLF, &ohci->regs->cmdstatus);
 753                 break;
 754         }
 755         if (urb->length != cnt)
 756                 dbg("TD LENGTH %d != CNT %d", urb->length, cnt);
 757 }
 758
 759 /*-------------------------------------------------------------------------*
 760  * Done List handling functions
 761  *-------------------------------------------------------------------------*/
 762
 763
 764 /* calculate the transfer length and update the urb */
 765
 766 static void dl_transfer_length(struct td *td)
 767 {
 768         __u32 tdINFO, tdBE, tdCBP;
 769         struct urb_priv *lurb_priv = &urb_priv;
 770
 771         tdINFO = m32_swap(td->hwINFO);
 772         tdBE = m32_swap(td->hwBE);
 773         tdCBP = m32_swap(td->hwCBP);
 774
 775         if (!(usb_pipecontrol(lurb_priv->pipe) &&
 776               ((td->index == 0) || (td->index == lurb_priv->length - 1)))) {
 777                 if (tdBE != 0) {
 778                         if (td->hwCBP == 0)
 779                                 lurb_priv->actual_length += tdBE - td->data + 1;
 780                         else
 781                                 lurb_priv->actual_length += tdCBP - td->data;
 782                 }
 783         }
 784 }
 785
 786 /*-------------------------------------------------------------------------*/
 787
 788 /* replies to the request have to be on a FIFO basis so
 789  * we reverse the reversed done-list */
 790
 791 static struct td *dl_reverse_done_list(struct ohci *ohci)
 792 {
 793         __u32 td_list_hc;
 794         __u32 tmp;
 795         struct td *td_rev = NULL;
 796         struct td *td_list = NULL;
 797         struct urb_priv *lurb_priv = NULL;
 798
 799         td_list_hc = m32_swap(ohci->hcca->done_head) & 0xfffffff0;
 800         ohci->hcca->done_head = 0;
 801
 802         while (td_list_hc) {
 803                 td_list = (struct td *) td_list_hc;
 804
 805                 if (TD_CC_GET(m32_swap(td_list->hwINFO))) {
 806                         lurb_priv = &urb_priv;
 807                         dbg(" USB-error/status: %x : %p",
 808                             TD_CC_GET(m32_swap(td_list->hwINFO)), td_list);
 809                         if (td_list->ed->hwHeadP & m32_swap(0x1)) {
 810                                 if (lurb_priv &&
 811                                     ((td_list->index+1) < lurb_priv->length)) {
 812                                         tmp = lurb_priv->length - 1;
 813                                         td_list->ed->hwHeadP =
 814                                                 (lurb_priv->td[tmp]->hwNextTD &
 815                                                  m32_swap(0xfffffff0)) |
 816                                                  (td_list->ed->hwHeadP &
 817                                                   m32_swap(0x2));
 818                                         lurb_priv->td_cnt += lurb_priv->length -
 819                                                              td_list->index - 1;
 820                                 } else
 821                                         td_list->ed->hwHeadP &=
 822                                             m32_swap(0xfffffff2);
 823                         }
 824                 }
 825
 826                 td_list->next_dl_td = td_rev;
 827                 td_rev = td_list;
 828                 td_list_hc = m32_swap(td_list->hwNextTD) & 0xfffffff0;
 829         }
 830
 831         return td_list;
 832 }
 833
 834 /*-------------------------------------------------------------------------*/
 835
 836 /* td done list */
 837 static int dl_done_list(struct ohci *ohci, struct td *td_list)
 838 {
 839         struct td *td_list_next = NULL;
 840         struct ed *ed;
 841         int cc = 0;
 842         int stat = 0;
 843         /* urb_t *urb; */
 844         struct urb_priv *lurb_priv;
 845         __u32 tdINFO, edHeadP, edTailP;
 846
 847         while (td_list) {
 848                 td_list_next = td_list->next_dl_td;
 849
 850                 lurb_priv = &urb_priv;
 851                 tdINFO = m32_swap(td_list->hwINFO);
 852
 853                 ed = td_list->ed;
 854
 855                 dl_transfer_length(td_list);
 856
 857                 /* error code of transfer */
 858                 cc = TD_CC_GET(tdINFO);
 859                 if (cc != 0) {
 860                         dbg("ConditionCode %#x", cc);
 861                         stat = cc_to_error[cc];
 862                 }
 863
 864                 /* see if this done list makes for all TD's of current URB,
 865                  * and mark the URB finished if so */
 866                 if (++(lurb_priv->td_cnt) == lurb_priv->length) {
 867                         if ((ed->state & (ED_OPER | ED_UNLINK)))
 868                                 urb_finished = 1;
 869                         else
 870                                 dbg("dl_done_list: strange.., ED state %x, "
 871                                     "ed->state\n");
 872                 } else
 873                         dbg("dl_done_list: processing TD %x, len %x\n",
 874                             lurb_priv->td_cnt, lurb_priv->length);
 875
 876                 if (ed->state != ED_NEW) {
 877                         edHeadP = m32_swap(ed->hwHeadP) & 0xfffffff0;
 878                         edTailP = m32_swap(ed->hwTailP);
 879
 880                         /* unlink eds if they are not busy */
 881                         if ((edHeadP == edTailP) && (ed->state == ED_OPER))
 882                                 ep_unlink(ohci, ed);
 883                 }
 884
 885                 td_list = td_list_next;
 886         }
 887         return stat;
 888 }
 889
 890 /*-------------------------------------------------------------------------*
 891  * Virtual Root Hub
 892  *-------------------------------------------------------------------------*/
 893
 894 /* Device descriptor */
 895 static __u8 root_hub_dev_des[] = {
 896         0x12,   /*  __u8  bLength; */
 897         0x01,   /*  __u8  bDescriptorType; Device */
 898         0x10,   /*  __u16 bcdUSB; v1.1 */
 899         0x01,
 900         0x09,   /*  __u8  bDeviceClass; HUB_CLASSCODE */
 901         0x00,   /*  __u8  bDeviceSubClass; */
 902         0x00,   /*  __u8  bDeviceProtocol; */
 903         0x08,   /*  __u8  bMaxPacketSize0; 8 Bytes */
 904         0x00,   /*  __u16 idVendor; */
 905         0x00,
 906         0x00,   /*  __u16 idProduct; */
 907         0x00,
 908         0x00,   /*  __u16 bcdDevice; */
 909         0x00,
 910         0x00,   /*  __u8  iManufacturer; */
 911         0x01,   /*  __u8  iProduct; */
 912         0x00,   /*  __u8  iSerialNumber; */
 913         0x01    /*  __u8  bNumConfigurations; */
 914 };
 915
 916 /* Configuration descriptor */
 917 static __u8 root_hub_config_des[] = {
 918         0x09,   /*  __u8  bLength; */
 919         0x02,   /*  __u8  bDescriptorType; Configuration */
 920         0x19,   /*  __u16 wTotalLength; */
 921         0x00,
 922         0x01,   /*  __u8  bNumInterfaces; */
 923         0x01,   /*  __u8  bConfigurationValue; */
 924         0x00,   /*  __u8  iConfiguration; */
 925         0x40,   /*  __u8  bmAttributes;
 926                    Bit 7: Bus-powered, 6: Self-powered,
 927                    5 Remote-wakwup, 4..0: resvd */
 928         0x00,   /*  __u8  MaxPower; */
 929
 930         /* interface */
 931         0x09,   /*  __u8  if_bLength; */
 932         0x04,   /*  __u8  if_bDescriptorType; Interface */
 933         0x00,   /*  __u8  if_bInterfaceNumber; */
 934         0x00,   /*  __u8  if_bAlternateSetting; */
 935         0x01,   /*  __u8  if_bNumEndpoints; */
 936         0x09,   /*  __u8  if_bInterfaceClass; HUB_CLASSCODE */
 937         0x00,   /*  __u8  if_bInterfaceSubClass; */
 938         0x00,   /*  __u8  if_bInterfaceProtocol; */
 939         0x00,   /*  __u8  if_iInterface; */
 940
 941         /* endpoint */
 942         0x07,   /*  __u8  ep_bLength; */
 943         0x05,   /*  __u8  ep_bDescriptorType; Endpoint */
 944         0x81,   /*  __u8  ep_bEndpointAddress; IN Endpoint 1 */
 945         0x03,   /*  __u8  ep_bmAttributes; Interrupt */
 946         0x02,   /*  __u16 ep_wMaxPacketSize; ((MAX_ROOT_PORTS + 1) / 8 */
 947         0x00,
 948         0xff    /*  __u8  ep_bInterval; 255 ms */
 949 };
 950
 951 static unsigned char root_hub_str_index0[] = {
 952         0x04,   /*  __u8  bLength; */
 953         0x03,   /*  __u8  bDescriptorType; String-descriptor */
 954         0x09,   /*  __u8  lang ID */
 955         0x04,   /*  __u8  lang ID */
 956 };
 957
 958 static unsigned char root_hub_str_index1[] = {
 959         28,     /*  __u8  bLength; */
 960         0x03,   /*  __u8  bDescriptorType; String-descriptor */
 961         'O',    /*  __u8  Unicode */
 962         0,      /*  __u8  Unicode */
 963         'H',    /*  __u8  Unicode */
 964         0,      /*  __u8  Unicode */
 965         'C',    /*  __u8  Unicode */
 966         0,      /*  __u8  Unicode */
 967         'I',    /*  __u8  Unicode */
 968         0,      /*  __u8  Unicode */
 969         ' ',    /*  __u8  Unicode */
 970         0,      /*  __u8  Unicode */
 971         'R',    /*  __u8  Unicode */
 972         0,      /*  __u8  Unicode */
 973         'o',    /*  __u8  Unicode */
 974         0,      /*  __u8  Unicode */
 975         'o',    /*  __u8  Unicode */
 976         0,      /*  __u8  Unicode */
 977         't',    /*  __u8  Unicode */
 978         0,      /*  __u8  Unicode */
 979         ' ',    /*  __u8  Unicode */
 980         0,      /*  __u8  Unicode */
 981         'H',    /*  __u8  Unicode */
 982         0,      /*  __u8  Unicode */
 983         'u',    /*  __u8  Unicode */
 984         0,      /*  __u8  Unicode */
 985         'b',    /*  __u8  Unicode */
 986         0,      /*  __u8  Unicode */
 987 };
 988
 989 /* Hub class-specific descriptor is constructed dynamically */
 990
 991
 992 /*-------------------------------------------------------------------------*/
 993
 994 #define OK(x)                   len = (x); break
 995 #ifdef DEBUG
 996 #define WR_RH_STAT(x) \
 997 { \
 998         info("WR:status %#8x", (x)); \
 999         writel((x), &gohci.regs->roothub.status); \
1000 }
1001 #define WR_RH_PORTSTAT(x) \
1002 { \
1003         info("WR:portstatus[%d] %#8x", wIndex-1, (x)); \
1004         writel((x), &gohci.regs->roothub.portstatus[wIndex-1]); \
1005 }
1006 #else
1007 #define WR_RH_STAT(x) \
1008         writel((x), &gohci.regs->roothub.status)
1009 #define WR_RH_PORTSTAT(x)\
1010         writel((x), &gohci.regs->roothub.portstatus[wIndex-1])
1011 #endif
1012 #define RD_RH_STAT      roothub_status(&gohci)
1013 #define RD_RH_PORTSTAT  roothub_portstatus(&gohci, wIndex-1)
1014
1015 /* request to virtual root hub */
1016
1017 int rh_check_port_status(struct ohci *controller)
1018 {
1019         __u32 temp, ndp, i;
1020         int res;
1021
1022         res = -1;
1023         temp = roothub_a(controller);
1024         ndp = (temp & RH_A_NDP);
1025         for (i = 0; i < ndp; i++) {
1026                 temp = roothub_portstatus(controller, i);
1027                 /* check for a device disconnect */
1028                 if (((temp & (RH_PS_PESC | RH_PS_CSC)) ==
1029                      (RH_PS_PESC | RH_PS_CSC)) && ((temp & RH_PS_CCS) == 0)) {
1030                         res = i;
1031                         break;
1032                 }
1033         }
1034         return res;
1035 }
1036
1037 static int ohci_submit_rh_msg(struct usb_device *dev, unsigned long pipe,
1038                               void *buffer, int transfer_len,
1039                               struct devrequest *cmd)
1040 {
1041         void *data = buffer;
1042         int leni = transfer_len;
1043         int len = 0;
1044         int stat = 0;
1045         __u32 datab[4];
1046         __u8 *data_buf = (__u8 *) datab;
1047         __u16 bmRType_bReq;
1048         __u16 wValue;
1049         __u16 wIndex;
1050         __u16 wLength;
1051
1052 #ifdef DEBUG
1053         urb_priv.actual_length = 0;
1054         pkt_print(dev, pipe, buffer, transfer_len, cmd, "SUB(rh)",
1055                   usb_pipein(pipe));
1056 #else
1057         wait_ms(1);
1058 #endif
1059         if (usb_pipeint(pipe)) {
1060                 info("Root-Hub submit IRQ: NOT implemented");
1061                 return 0;
1062         }
1063
1064         bmRType_bReq = cmd->requesttype | (cmd->request << 8);
1065         wValue = m16_swap(cmd->value);
1066         wIndex = m16_swap(cmd->index);
1067         wLength = m16_swap(cmd->length);
1068
1069         info("Root-Hub: adr: %2x cmd(%1x): %08x %04x %04x %04x",
1070              dev->devnum, 8, bmRType_bReq, wValue, wIndex, wLength);
1071
1072         switch (bmRType_bReq) {
1073                 /* Request Destination:
1074                    without flags: Device,
1075                    RH_INTERFACE: interface,
1076                    RH_ENDPOINT: endpoint,
1077                    RH_CLASS means HUB here,
1078                    RH_OTHER | RH_CLASS  almost ever means HUB_PORT here
1079                  */
1080
1081         case RH_GET_STATUS:
1082                 *(__u16 *) data_buf = m16_swap(1);
1083                 OK(2);
1084         case RH_GET_STATUS | RH_INTERFACE:
1085                 *(__u16 *) data_buf = m16_swap(0);
1086                 OK(2);
1087         case RH_GET_STATUS | RH_ENDPOINT:
1088                 *(__u16 *) data_buf = m16_swap(0);
1089                 OK(2);
1090         case RH_GET_STATUS | RH_CLASS:
1091                 *(__u32 *) data_buf =
1092                     m32_swap(RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE));
1093                 OK(4);
1094         case RH_GET_STATUS | RH_OTHER | RH_CLASS:
1095                 *(__u32 *) data_buf = m32_swap(RD_RH_PORTSTAT);
1096                 OK(4);
1097
1098         case RH_CLEAR_FEATURE | RH_ENDPOINT:
1099                 switch (wValue) {
1100                 case (RH_ENDPOINT_STALL):
1101                         OK(0);
1102                 }
1103                 break;
1104
1105         case RH_CLEAR_FEATURE | RH_CLASS:
1106                 switch (wValue) {
1107                 case RH_C_HUB_LOCAL_POWER:
1108                         OK(0);
1109                 case (RH_C_HUB_OVER_CURRENT):
1110                         WR_RH_STAT(RH_HS_OCIC);
1111                         OK(0);
1112                 }
1113                 break;
1114
1115         case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
1116                 switch (wValue) {
1117                 case (RH_PORT_ENABLE):
1118                         WR_RH_PORTSTAT(RH_PS_CCS);
1119                         OK(0);
1120                 case (RH_PORT_SUSPEND):
1121                         WR_RH_PORTSTAT(RH_PS_POCI);
1122                         OK(0);
1123                 case (RH_PORT_POWER):
1124                         WR_RH_PORTSTAT(RH_PS_LSDA);
1125                         OK(0);
1126                 case (RH_C_PORT_CONNECTION):
1127                         WR_RH_PORTSTAT(RH_PS_CSC);
1128                         OK(0);
1129                 case (RH_C_PORT_ENABLE):
1130                         WR_RH_PORTSTAT(RH_PS_PESC);
1131                         OK(0);
1132                 case (RH_C_PORT_SUSPEND):
1133                         WR_RH_PORTSTAT(RH_PS_PSSC);
1134                         OK(0);
1135                 case (RH_C_PORT_OVER_CURRENT):
1136                         WR_RH_PORTSTAT(RH_PS_OCIC);
1137                         OK(0);
1138                 case (RH_C_PORT_RESET):
1139                         WR_RH_PORTSTAT(RH_PS_PRSC);
1140                         OK(0);
1141                 }
1142                 break;
1143
1144         case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
1145                 switch (wValue) {
1146                 case (RH_PORT_SUSPEND):
1147                         WR_RH_PORTSTAT(RH_PS_PSS);
1148                         OK(0);
1149                 case (RH_PORT_RESET):   /* BUG IN HUP CODE ******** */
1150                         if (RD_RH_PORTSTAT & RH_PS_CCS)
1151                                 WR_RH_PORTSTAT(RH_PS_PRS);
1152                         OK(0);
1153                 case (RH_PORT_POWER):
1154                         WR_RH_PORTSTAT(RH_PS_PPS);
1155                         OK(0);
1156                 case (RH_PORT_ENABLE):  /* BUG IN HUP CODE ******** */
1157                         if (RD_RH_PORTSTAT & RH_PS_CCS)
1158                                 WR_RH_PORTSTAT(RH_PS_PES);
1159                         OK(0);
1160                 }
1161                 break;
1162
1163         case RH_SET_ADDRESS:
1164                 gohci.rh.devnum = wValue;
1165                 OK(0);
1166
1167         case RH_GET_DESCRIPTOR:
1168                 switch ((wValue & 0xff00) >> 8) {
1169                 case (0x01):    /* device descriptor */
1170                         len = min_t(unsigned int,
1171                                     leni,
1172                                     min_t(unsigned int,
1173                                           sizeof(root_hub_dev_des), wLength));
1174                         data_buf = root_hub_dev_des;
1175                         OK(len);
1176                 case (0x02):    /* configuration descriptor */
1177                         len = min_t(unsigned int,
1178                                     leni,
1179                                     min_t(unsigned int,
1180                                           sizeof(root_hub_config_des),
1181                                           wLength));
1182                         data_buf = root_hub_config_des;
1183                         OK(len);
1184                 case (0x03):    /* string descriptors */
1185                         if (wValue == 0x0300) {
1186                                 len = min_t(unsigned int,
1187                                             leni,
1188                                             min_t(unsigned int,
1189                                                   sizeof(root_hub_str_index0),
1190                                                   wLength));
1191                                 data_buf = root_hub_str_index0;
1192                                 OK(len);
1193                         }
1194                         if (wValue == 0x0301) {
1195                                 len = min_t(unsigned int,
1196                                             leni,
1197                                             min_t(unsigned int,
1198                                                   sizeof(root_hub_str_index1),
1199                                                   wLength));
1200                                 data_buf = root_hub_str_index1;
1201                                 OK(len);
1202                         }
1203                 default:
1204                         stat = USB_ST_STALLED;
1205                 }
1206                 break;
1207
1208         case RH_GET_DESCRIPTOR | RH_CLASS:
1209                 {
1210                         __u32 temp = roothub_a(&gohci);
1211
1212                         data_buf[0] = 9;        /* min length; */
1213                         data_buf[1] = 0x29;
1214                         data_buf[2] = temp & RH_A_NDP;
1215                         data_buf[3] = 0;
1216                         if (temp & RH_A_PSM)
1217                                 /* per-port power switching? */
1218                                 data_buf[3] |= 0x1;
1219                         if (temp & RH_A_NOCP)
1220                                 /* no overcurrent reporting? */
1221                                 data_buf[3] |= 0x10;
1222                         else if (temp & RH_A_OCPM)
1223                                 /* per-port overcurrent reporting? */
1224                                 data_buf[3] |= 0x8;
1225
1226                         /* corresponds to data_buf[4-7] */
1227                         datab[1] = 0;
1228                         data_buf[5] = (temp & RH_A_POTPGT) >> 24;
1229                         temp = roothub_b(&gohci);
1230                         data_buf[7] = temp & RH_B_DR;
1231                         if (data_buf[2] < 7) {
1232                                 data_buf[8] = 0xff;
1233                         } else {
1234                                 data_buf[0] += 2;
1235                                 data_buf[8] = (temp & RH_B_DR) >> 8;
1236                                 data_buf[10] = data_buf[9] = 0xff;
1237                         }
1238
1239                         len = min_t(unsigned int, leni,
1240                                     min_t(unsigned int, data_buf[0], wLength));
1241                         OK(len);
1242                 }
1243
1244         case RH_GET_CONFIGURATION:
1245                 *(__u8 *) data_buf = 0x01;
1246                 OK(1);
1247
1248         case RH_SET_CONFIGURATION:
1249                 WR_RH_STAT(0x10000);
1250                 OK(0);
1251
1252         default:
1253                 dbg("unsupported root hub command");
1254                 stat = USB_ST_STALLED;
1255         }
1256
1257 #ifdef  DEBUG
1258         ohci_dump_roothub(&gohci, 1);
1259 #else
1260         wait_ms(1);
1261 #endif
1262
1263         len = min_t(int, len, leni);
1264         if (data != data_buf)
1265                 memcpy(data, data_buf, len);
1266         dev->act_len = len;
1267         dev->status = stat;
1268
1269 #ifdef DEBUG
1270         if (transfer_len)
1271                 urb_priv.actual_length = transfer_len;
1272         pkt_print(dev, pipe, buffer, transfer_len, cmd, "RET(rh)",
1273                   0 /*usb_pipein(pipe) */);
1274 #else
1275         wait_ms(1);
1276 #endif
1277
1278         return stat;
1279 }
1280
1281 /*-------------------------------------------------------------------------*/
1282
1283 /* common code for handling submit messages - used for all but root hub */
1284 /* accesses. */
1285 int submit_common_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1286                       int transfer_len, struct devrequest *setup, int interval)
1287 {
1288         int stat = 0;
1289         int maxsize = usb_maxpacket(dev, pipe);
1290         int timeout;
1291
1292         /* device pulled? Shortcut the action. */
1293         if (devgone == dev) {
1294                 dev->status = USB_ST_CRC_ERR;
1295                 return 0;
1296         }
1297 #ifdef DEBUG
1298         urb_priv.actual_length = 0;
1299         pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB",
1300                   usb_pipein(pipe));
1301 #else
1302         wait_ms(1);
1303 #endif
1304         if (!maxsize) {
1305                 err("submit_common_message: pipesize for pipe %lx is zero",
1306                     pipe);
1307                 return -1;
1308         }
1309
1310         if (sohci_submit_job(dev, pipe, buffer, transfer_len, setup, interval) <
1311             0) {
1312                 err("sohci_submit_job failed");
1313                 return -1;
1314         }
1315
1316         wait_ms(10);
1317         /* ohci_dump_status(&gohci); */
1318
1319         /* allow more time for a BULK device to react - some are slow */
1320 #define BULK_TO  5000           /* timeout in milliseconds */
1321         if (usb_pipebulk(pipe))
1322                 timeout = BULK_TO;
1323         else
1324                 timeout = 100;
1325
1326         /* wait for it to complete */
1327         for (;;) {
1328                 /* check whether the controller is done */
1329                 stat = hc_interrupt();
1330
1331                 if (stat < 0) {
1332                         stat = USB_ST_CRC_ERR;
1333                         break;
1334                 }
1335
1336                 /* NOTE: since we are not interrupt driven in U-Boot and always
1337                  * handle only one URB at a time, we cannot assume the
1338                  * transaction finished on the first successful return from
1339                  * hc_interrupt().. unless the flag for current URB is set,
1340                  * meaning that all TD's to/from device got actually
1341                  * transferred and processed. If the current URB is not
1342                  * finished we need to re-iterate this loop so as
1343                  * hc_interrupt() gets called again as there needs to be some
1344                  * more TD's to process still */
1345                 if ((stat >= 0) && (stat != 0xff) && (urb_finished)) {
1346                         /* 0xff is returned for an SF-interrupt */
1347                         break;
1348                 }
1349
1350                 if (--timeout) {
1351                         wait_ms(1);
1352                         if (!urb_finished)
1353                                 dbg("\%");
1354
1355                 } else {
1356                         err("CTL:TIMEOUT ");
1357                         dbg("submit_common_msg: TO status %x\n", stat);
1358                         stat = USB_ST_CRC_ERR;
1359                         urb_finished = 1;
1360                         break;
1361                 }
1362         }
1363
1364 #if 0
1365         /* we got an Root Hub Status Change interrupt */
1366         if (got_rhsc) {
1367 #ifdef DEBUG
1368                 ohci_dump_roothub(&gohci, 1);
1369 #endif
1370                 got_rhsc = 0;
1371                 /* abuse timeout */
1372                 timeout = rh_check_port_status(&gohci);
1373                 if (timeout >= 0) {
1374 #if 0                   /* this does nothing useful, but leave it here
1375                            in case that changes */
1376                         /* the called routine adds 1 to the passed value */
1377                         usb_hub_port_connect_change(gohci.rh.dev, timeout - 1);
1378 #endif
1379                         /*
1380                          * XXX
1381                          * This is potentially dangerous because it assumes
1382                          * that only one device is ever plugged in!
1383                          */
1384                         devgone = dev;
1385                 }
1386         }
1387 #endif
1388
1389         dev->status = stat;
1390         dev->act_len = transfer_len;
1391
1392 #ifdef DEBUG
1393         pkt_print(dev, pipe, buffer, transfer_len, setup, "RET(ctlr)",
1394                   usb_pipein(pipe));
1395 #else
1396         wait_ms(1);
1397 #endif
1398
1399         /* free TDs in urb_priv */
1400         urb_free_priv(&urb_priv);
1401         return 0;
1402 }
1403
1404 /* submit routines called from usb.c */
1405 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1406                     int transfer_len)
1407 {
1408         info("submit_bulk_msg");
1409         return submit_common_msg(dev, pipe, buffer, transfer_len, NULL, 0);
1410 }
1411
1412 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1413                        int transfer_len, struct devrequest *setup)
1414 {
1415         int maxsize = usb_maxpacket(dev, pipe);
1416
1417         info("submit_control_msg");
1418 #ifdef DEBUG
1419         urb_priv.actual_length = 0;
1420         pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB",
1421                   usb_pipein(pipe));
1422 #else
1423         wait_ms(1);
1424 #endif
1425         if (!maxsize) {
1426                 err("submit_control_message: pipesize for pipe %lx is zero",
1427                     pipe);
1428                 return -1;
1429         }
1430         if (((pipe >> 8) & 0x7f) == gohci.rh.devnum) {
1431                 gohci.rh.dev = dev;
1432                 /* root hub - redirect */
1433                 return ohci_submit_rh_msg(dev, pipe, buffer, transfer_len,
1434                                           setup);
1435         }
1436
1437         return submit_common_msg(dev, pipe, buffer, transfer_len, setup, 0);
1438 }
1439
1440 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1441                    int transfer_len, int interval)
1442 {
1443         info("submit_int_msg");
1444         return -1;
1445 }
1446
1447 /*-------------------------------------------------------------------------*
1448  * HC functions
1449  *-------------------------------------------------------------------------*/
1450
1451 /* reset the HC and BUS */
1452
1453 static int hc_reset(struct ohci *ohci)
1454 {
1455         int timeout = 30;
1456         int smm_timeout = 50;   /* 0,5 sec */
1457
1458         if (readl(&ohci->regs->control) & OHCI_CTRL_IR) {
1459                 /* SMM owns the HC - request ownership */
1460                 writel(OHCI_OCR, &ohci->regs->cmdstatus);
1461                 info("USB HC TakeOver from SMM");
1462                 while (readl(&ohci->regs->control) & OHCI_CTRL_IR) {
1463                         wait_ms(10);
1464                         if (--smm_timeout == 0) {
1465                                 err("USB HC TakeOver failed!");
1466                                 return -1;
1467                         }
1468                 }
1469         }
1470
1471         /* Disable HC interrupts */
1472         writel(OHCI_INTR_MIE, &ohci->regs->intrdisable);
1473
1474         dbg("USB HC reset_hc usb-%s: ctrl = 0x%X ;",
1475             ohci->slot_name, readl(&ohci->regs->control));
1476
1477         /* Reset USB (needed by some controllers) */
1478         writel(0, &ohci->regs->control);
1479
1480         /* HC Reset requires max 10 us delay */
1481         writel(OHCI_HCR, &ohci->regs->cmdstatus);
1482         while ((readl(&ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
1483                 if (--timeout == 0) {
1484                         err("USB HC reset timed out!");
1485                         return -1;
1486                 }
1487                 udelay(1);
1488         }
1489         return 0;
1490 }
1491
1492 /*-------------------------------------------------------------------------*/
1493
1494 /* Start an OHCI controller, set the BUS operational
1495  * enable interrupts
1496  * connect the virtual root hub */
1497
1498 static int hc_start(struct ohci *ohci)
1499 {
1500         __u32 mask;
1501         unsigned int fminterval;
1502
1503         ohci->disabled = 1;
1504
1505         /* Tell the controller where the control and bulk lists are
1506          * The lists are empty now. */
1507
1508         writel(0, &ohci->regs->ed_controlhead);
1509         writel(0, &ohci->regs->ed_bulkhead);
1510
1511         /* a reset clears this */
1512         writel((__u32) ohci->hcca, &ohci->regs->hcca);
1513
1514         fminterval = 0x2edf;
1515         writel((fminterval * 9) / 10, &ohci->regs->periodicstart);
1516         fminterval |= ((((fminterval - 210) * 6) / 7) << 16);
1517         writel(fminterval, &ohci->regs->fminterval);
1518         writel(0x628, &ohci->regs->lsthresh);
1519
1520         /* start controller operations */
1521         ohci->hc_control = OHCI_CONTROL_INIT | OHCI_USB_OPER;
1522         ohci->disabled = 0;
1523         writel(ohci->hc_control, &ohci->regs->control);
1524
1525         /* disable all interrupts */
1526         mask = (OHCI_INTR_SO | OHCI_INTR_WDH | OHCI_INTR_SF | OHCI_INTR_RD |
1527                 OHCI_INTR_UE | OHCI_INTR_FNO | OHCI_INTR_RHSC |
1528                 OHCI_INTR_OC | OHCI_INTR_MIE);
1529         writel(mask, &ohci->regs->intrdisable);
1530         /* clear all interrupts */
1531         mask &= ~OHCI_INTR_MIE;
1532         writel(mask, &ohci->regs->intrstatus);
1533         /* Choose the interrupts we care about now  - but w/o MIE */
1534         mask = OHCI_INTR_RHSC | OHCI_INTR_UE | OHCI_INTR_WDH | OHCI_INTR_SO;
1535         writel(mask, &ohci->regs->intrenable);
1536
1537 #ifdef  OHCI_USE_NPS
1538         /* required for AMD-756 and some Mac platforms */
1539         writel((roothub_a(ohci) | RH_A_NPS) & ~RH_A_PSM,
1540                &ohci->regs->roothub.a);
1541         writel(RH_HS_LPSC, &ohci->regs->roothub.status);
1542 #endif /* OHCI_USE_NPS */
1543
1544 #define mdelay(n) ({unsigned long msec=(n); while (msec--) udelay(1000);})
1545         /* POTPGT delay is bits 24-31, in 2 ms units. */
1546         mdelay((roothub_a(ohci) >> 23) & 0x1fe);
1547
1548         /* connect the virtual root hub */
1549         ohci->rh.devnum = 0;
1550
1551         return 0;
1552 }
1553
1554 /*-------------------------------------------------------------------------*/
1555
1556 /* an interrupt happens */
1557
1558 static int hc_interrupt(void)
1559 {
1560         struct ohci *ohci = &gohci;
1561         struct ohci_regs *regs = ohci->regs;
1562         int ints;
1563         int stat = -1;
1564
1565         if ((ohci->hcca->done_head != 0) &&
1566             !(m32_swap(ohci->hcca->done_head) & 0x01)) {
1567
1568                 ints = OHCI_INTR_WDH;
1569
1570         } else {
1571                 ints = readl(&regs->intrstatus);
1572                 if (ints == ~(u32) 0) {
1573                         ohci->disabled++;
1574                         err("%s device removed!", ohci->slot_name);
1575                         return -1;
1576                 }
1577                 ints &= readl(&regs->intrenable);
1578                 if (ints == 0) {
1579                         dbg("hc_interrupt: returning..\n");
1580                         return 0xff;
1581                 }
1582         }
1583
1584         /* dbg("Interrupt: %x frame: %x", ints,
1585             le16_to_cpu(ohci->hcca->frame_no)); */
1586
1587         if (ints & OHCI_INTR_RHSC) {
1588                 got_rhsc = 1;
1589                 stat = 0xff;
1590         }
1591
1592         if (ints & OHCI_INTR_UE) {
1593                 ohci->disabled++;
1594                 err("OHCI Unrecoverable Error, controller usb-%s disabled",
1595                     ohci->slot_name);
1596                 /* e.g. due to PCI Master/Target Abort */
1597
1598 #ifdef  DEBUG
1599                 ohci_dump(ohci, 1);
1600 #else
1601                 wait_ms(1);
1602 #endif
1603                 /* FIXME: be optimistic, hope that bug won't repeat often. */
1604                 /* Make some non-interrupt context restart the controller. */
1605                 /* Count and limit the retries though; either hardware or */
1606                 /* software errors can go forever... */
1607                 hc_reset(ohci);
1608                 return -1;
1609         }
1610
1611         if (ints & OHCI_INTR_WDH) {
1612                 wait_ms(1);
1613
1614                 writel(OHCI_INTR_WDH, &regs->intrdisable);
1615                 stat = dl_done_list(&gohci, dl_reverse_done_list(&gohci));
1616                 writel(OHCI_INTR_WDH, &regs->intrenable);
1617         }
1618
1619         if (ints & OHCI_INTR_SO) {
1620                 dbg("USB Schedule overrun\n");
1621                 writel(OHCI_INTR_SO, &regs->intrenable);
1622                 stat = -1;
1623         }
1624
1625         /* FIXME:  this assumes SOF (1/ms) interrupts don't get lost... */
1626         if (ints & OHCI_INTR_SF) {
1627                 unsigned int frame = m16_swap(ohci->hcca->frame_no) & 1;
1628                 wait_ms(1);
1629                 writel(OHCI_INTR_SF, &regs->intrdisable);
1630                 if (ohci->ed_rm_list[frame] != NULL)
1631                         writel(OHCI_INTR_SF, &regs->intrenable);
1632                 stat = 0xff;
1633         }
1634
1635         writel(ints, &regs->intrstatus);
1636         return stat;
1637 }
1638
1639 /*-------------------------------------------------------------------------*/
1640
1641 /*-------------------------------------------------------------------------*/
1642
1643 /* De-allocate all resources.. */
1644
1645 static void hc_release_ohci(struct ohci *ohci)
1646 {
1647         dbg("USB HC release ohci usb-%s", ohci->slot_name);
1648
1649         if (!ohci->disabled)
1650                 hc_reset(ohci);
1651 }
1652
1653 /*-------------------------------------------------------------------------*/
1654
1655 /*
1656  * low level initalisation routine, called from usb.c
1657  */
1658 static char ohci_inited = 0;
1659
1660 int usb_lowlevel_init(void)
1661 {
1662         struct s3c24x0_clock_power *clk_power = s3c24x0_get_base_clock_power();
1663         struct s3c24x0_gpio *gpio = s3c24x0_get_base_gpio();
1664
1665         /*
1666          * Set the 48 MHz UPLL clocking. Values are taken from
1667          * "PLL value selection guide", 6-23, s3c2400_UM.pdf.
1668          */
1669         clk_power->upllcon = ((40 << 12) + (1 << 4) + 2);
1670         gpio->misccr |= 0x8;    /* 1 = use pads related USB for USB host */
1671
1672         /*
1673          * Enable USB host clock.
1674          */
1675         clk_power->clkcon |= (1 << 4);
1676
1677         memset(&gohci, 0, sizeof(struct ohci));
1678         memset(&urb_priv, 0, sizeof(struct urb_priv));
1679
1680         /* align the storage */
1681         if ((__u32) &ghcca[0] & 0xff) {
1682                 err("HCCA not aligned!!");
1683                 return -1;
1684         }
1685         phcca = &ghcca[0];
1686         info("aligned ghcca %p", phcca);
1687         memset(&ohci_dev, 0, sizeof(struct ohci_device));
1688         if ((__u32) &ohci_dev.ed[0] & 0x7) {
1689                 err("EDs not aligned!!");
1690                 return -1;
1691         }
1692         memset(gtd, 0, sizeof(struct td) * (NUM_TD + 1));
1693         if ((__u32) gtd & 0x7) {
1694                 err("TDs not aligned!!");
1695                 return -1;
1696         }
1697         ptd = gtd;
1698         gohci.hcca = phcca;
1699         memset(phcca, 0, sizeof(struct ohci_hcca));
1700
1701         gohci.disabled = 1;
1702         gohci.sleeping = 0;
1703         gohci.irq = -1;
1704         gohci.regs = (struct ohci_regs *)S3C24X0_USB_HOST_BASE;
1705
1706         gohci.flags = 0;
1707         gohci.slot_name = "s3c2400";
1708
1709         if (hc_reset(&gohci) < 0) {
1710                 hc_release_ohci(&gohci);
1711                 /* Initialization failed */
1712                 clk_power->clkcon &= ~(1 << 4);
1713                 return -1;
1714         }
1715
1716         /* FIXME this is a second HC reset; why?? */
1717         gohci.hc_control = OHCI_USB_RESET;
1718         writel(gohci.hc_control, &gohci.regs->control);
1719         wait_ms(10);
1720
1721         if (hc_start(&gohci) < 0) {
1722                 err("can't start usb-%s", gohci.slot_name);
1723                 hc_release_ohci(&gohci);
1724                 /* Initialization failed */
1725                 clk_power->clkcon &= ~(1 << 4);
1726                 return -1;
1727         }
1728 #ifdef  DEBUG
1729         ohci_dump(&gohci, 1);
1730 #else
1731         wait_ms(1);
1732 #endif
1733         ohci_inited = 1;
1734         urb_finished = 1;
1735
1736         return 0;
1737 }
1738
1739 int usb_lowlevel_stop(void)
1740 {
1741         struct s3c24x0_clock_power *clk_power = s3c24x0_get_base_clock_power();
1742
1743         /* this gets called really early - before the controller has */
1744         /* even been initialized! */
1745         if (!ohci_inited)
1746                 return 0;
1747         /* TODO release any interrupts, etc. */
1748         /* call hc_release_ohci() here ? */
1749         hc_reset(&gohci);
1750         /* may not want to do this */
1751         clk_power->clkcon &= ~(1 << 4);
1752         return 0;
1753 }
1754
1755 #endif /* defined(CONFIG_USB_OHCI) && defined(CONFIG_S3C24X0) */