drivers/usb/host/ohci-hcd.c

   1 /*
   2  * URB OHCI HCD (Host Controller Driver) for USB on the AT91RM9200 and PCI bus.
   3  *
   4  * Interrupt support is added. Now, it has been tested
   5  * on ULI1575 chip and works well with USB keyboard.
   6  *
   7  * (C) Copyright 2007
   8  * Zhang Wei, Freescale Semiconductor, Inc. <wei.zhang@freescale.com>
   9  *
  10  * (C) Copyright 2003
  11  * Gary Jennejohn, DENX Software Engineering <garyj@denx.de>
  12  *
  13  * Note: Much of this code has been derived from Linux 2.4
  14  * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
  15  * (C) Copyright 2000-2002 David Brownell
  16  *
  17  * Modified for the MP2USB by (C) Copyright 2005 Eric Benard
  18  * ebenard@eukrea.com - based on s3c24x0's driver
  19  *
  20  * See file CREDITS for list of people who contributed to this
  21  * project.
  22  *
  23  * This program is free software; you can redistribute it and/or
  24  * modify it under the terms of the GNU General Public License as
  25  * published by the Free Software Foundation; either version 2 of
  26  * the License, or (at your option) any later version.
  27  *
  28  * This program is distributed in the hope that it will be useful,
  29  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  30  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  31  * GNU General Public License for more details.
  32  *
  33  * You should have received a copy of the GNU General Public License
  34  * along with this program; if not, write to the Free Software
  35  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  36  * MA 02111-1307 USA
  37  *
  38  */
  39 /*
  40  * IMPORTANT NOTES
  41  * 1 - Read doc/README.generic_usb_ohci
  42  * 2 - this driver is intended for use with USB Mass Storage Devices
  43  *     (BBB) and USB keyboard. There is NO support for Isochronous pipes!
  44  * 2 - when running on a PQFP208 AT91RM9200, define CONFIG_AT91C_PQFP_UHPBUG
  45  *     to activate workaround for bug #41 or this driver will NOT work!
  46  */
  47
  48 #include <common.h>
  49 #include <asm/byteorder.h>
  50
  51 #if defined(CONFIG_PCI_OHCI)
  52 # include <pci.h>
  53 #if !defined(CONFIG_PCI_OHCI_DEVNO)
  54 #define CONFIG_PCI_OHCI_DEVNO   0
  55 #endif
  56 #endif
  57
  58 #include <malloc.h>
  59 #include <usb.h>
  60
  61 #include "ohci.h"
  62
  63 #ifdef CONFIG_AT91RM9200
  64 #include <asm/arch/hardware.h>  /* needed for AT91_USB_HOST_BASE */
  65 #endif
  66
  67 #if defined(CONFIG_ARM920T) || \
  68     defined(CONFIG_S3C24X0) || \
  69     defined(CONFIG_S3C6400) || \
  70     defined(CONFIG_440EP) || \
  71     defined(CONFIG_PCI_OHCI) || \
  72     defined(CONFIG_MPC5200) || \
  73     defined(CONFIG_SYS_OHCI_USE_NPS)
  74 # define OHCI_USE_NPS           /* force NoPowerSwitching mode */
  75 #endif
  76
  77 #undef OHCI_VERBOSE_DEBUG       /* not always helpful */
  78 #undef DEBUG
  79 #undef SHOW_INFO
  80 #undef OHCI_FILL_TRACE
  81
  82 /* For initializing controller (mask in an HCFS mode too) */
  83 #define OHCI_CONTROL_INIT \
  84         (OHCI_CTRL_CBSR & 0x3) | OHCI_CTRL_IE | OHCI_CTRL_PLE
  85
  86 #define min_t(type, x, y) \
  87                     ({ type __x = (x); type __y = (y); __x < __y ? __x: __y; })
  88
  89 #ifdef CONFIG_PCI_OHCI
  90 static struct pci_device_id ohci_pci_ids[] = {
  91         {0x10b9, 0x5237},       /* ULI1575 PCI OHCI module ids */
  92         {0x1033, 0x0035},       /* NEC PCI OHCI module ids */
  93         {0x1131, 0x1561},       /* Philips 1561 PCI OHCI module ids */
  94         /* Please add supported PCI OHCI controller ids here */
  95         {0, 0}
  96 };
  97 #endif
  98
  99 #ifdef CONFIG_PCI_EHCI_DEVNO
 100 static struct pci_device_id ehci_pci_ids[] = {
 101         {0x1131, 0x1562},       /* Philips 1562 PCI EHCI module ids */
 102         /* Please add supported PCI EHCI controller ids here */
 103         {0, 0}
 104 };
 105 #endif
 106
 107 #ifdef DEBUG
 108 #define dbg(format, arg...) printf("DEBUG: " format "\n", ## arg)
 109 #else
 110 #define dbg(format, arg...) do {} while (0)
 111 #endif /* DEBUG */
 112 #define err(format, arg...) printf("ERROR: " format "\n", ## arg)
 113 #ifdef SHOW_INFO
 114 #define info(format, arg...) printf("INFO: " format "\n", ## arg)
 115 #else
 116 #define info(format, arg...) do {} while (0)
 117 #endif
 118
 119 #ifdef CONFIG_SYS_OHCI_BE_CONTROLLER
 120 # define m16_swap(x) cpu_to_be16(x)
 121 # define m32_swap(x) cpu_to_be32(x)
 122 #else
 123 # define m16_swap(x) cpu_to_le16(x)
 124 # define m32_swap(x) cpu_to_le32(x)
 125 #endif /* CONFIG_SYS_OHCI_BE_CONTROLLER */
 126
 127 /* global ohci_t */
 128 static ohci_t gohci;
 129 /* this must be aligned to a 256 byte boundary */
 130 struct ohci_hcca ghcca[1];
 131 /* a pointer to the aligned storage */
 132 struct ohci_hcca *phcca;
 133 /* this allocates EDs for all possible endpoints */
 134 struct ohci_device ohci_dev;
 135 /* device which was disconnected */
 136 struct usb_device *devgone;
 137
 138 static inline u32 roothub_a(struct ohci *hc)
 139         { return ohci_readl(&hc->regs->roothub.a); }
 140 static inline u32 roothub_b(struct ohci *hc)
 141         { return ohci_readl(&hc->regs->roothub.b); }
 142 static inline u32 roothub_status(struct ohci *hc)
 143         { return ohci_readl(&hc->regs->roothub.status); }
 144 static inline u32 roothub_portstatus(struct ohci *hc, int i)
 145         { return ohci_readl(&hc->regs->roothub.portstatus[i]); }
 146
 147 /* forward declaration */
 148 static int hc_interrupt(void);
 149 static void td_submit_job(struct usb_device *dev, unsigned long pipe,
 150                           void *buffer, int transfer_len,
 151                           struct devrequest *setup, urb_priv_t *urb,
 152                           int interval);
 153
 154 /*-------------------------------------------------------------------------*
 155  * URB support functions
 156  *-------------------------------------------------------------------------*/
 157
 158 /* free HCD-private data associated with this URB */
 159
 160 static void urb_free_priv(urb_priv_t *urb)
 161 {
 162         int             i;
 163         int             last;
 164         struct td       *td;
 165
 166         last = urb->length - 1;
 167         if (last >= 0) {
 168                 for (i = 0; i <= last; i++) {
 169                         td = urb->td[i];
 170                         if (td) {
 171                                 td->usb_dev = NULL;
 172                                 urb->td[i] = NULL;
 173                         }
 174                 }
 175         }
 176         free(urb);
 177 }
 178
 179 /*-------------------------------------------------------------------------*/
 180
 181 #ifdef DEBUG
 182 static int sohci_get_current_frame_number(struct usb_device *dev);
 183
 184 /* debug| print the main components of an URB
 185  * small: 0) header + data packets 1) just header */
 186
 187 static void pkt_print(urb_priv_t *purb, struct usb_device *dev,
 188                       unsigned long pipe, void *buffer, int transfer_len,
 189                       struct devrequest *setup, char *str, int small)
 190 {
 191         dbg("%s URB:[%4x] dev:%2lu,ep:%2lu-%c,type:%s,len:%d/%d stat:%#lx",
 192                         str,
 193                         sohci_get_current_frame_number(dev),
 194                         usb_pipedevice(pipe),
 195                         usb_pipeendpoint(pipe),
 196                         usb_pipeout(pipe)? 'O': 'I',
 197                         usb_pipetype(pipe) < 2 ? \
 198                                 (usb_pipeint(pipe)? "INTR": "ISOC"): \
 199                                 (usb_pipecontrol(pipe)? "CTRL": "BULK"),
 200                         (purb ? purb->actual_length : 0),
 201                         transfer_len, dev->status);
 202 #ifdef  OHCI_VERBOSE_DEBUG
 203         if (!small) {
 204                 int i, len;
 205
 206                 if (usb_pipecontrol(pipe)) {
 207                         printf(__FILE__ ": cmd(8):");
 208                         for (i = 0; i < 8 ; i++)
 209                                 printf(" %02x", ((__u8 *) setup) [i]);
 210                         printf("\n");
 211                 }
 212                 if (transfer_len > 0 && buffer) {
 213                         printf(__FILE__ ": data(%d/%d):",
 214                                 (purb ? purb->actual_length : 0),
 215                                 transfer_len);
 216                         len = usb_pipeout(pipe)? transfer_len:
 217                                         (purb ? purb->actual_length : 0);
 218                         for (i = 0; i < 16 && i < len; i++)
 219                                 printf(" %02x", ((__u8 *) buffer) [i]);
 220                         printf("%s\n", i < len? "...": "");
 221                 }
 222         }
 223 #endif
 224 }
 225
 226 /* just for debugging; prints non-empty branches of the int ed tree
 227  * inclusive iso eds */
 228 void ep_print_int_eds(ohci_t *ohci, char *str)
 229 {
 230         int i, j;
 231          __u32 *ed_p;
 232         for (i = 0; i < 32; i++) {
 233                 j = 5;
 234                 ed_p = &(ohci->hcca->int_table [i]);
 235                 if (*ed_p == 0)
 236                     continue;
 237                 printf(__FILE__ ": %s branch int %2d(%2x):", str, i, i);
 238                 while (*ed_p != 0 && j--) {
 239                         ed_t *ed = (ed_t *)m32_swap(ed_p);
 240                         printf(" ed: %4x;", ed->hwINFO);
 241                         ed_p = &ed->hwNextED;
 242                 }
 243                 printf("\n");
 244         }
 245 }
 246
 247 static void ohci_dump_intr_mask(char *label, __u32 mask)
 248 {
 249         dbg("%s: 0x%08x%s%s%s%s%s%s%s%s%s",
 250                 label,
 251                 mask,
 252                 (mask & OHCI_INTR_MIE) ? " MIE" : "",
 253                 (mask & OHCI_INTR_OC) ? " OC" : "",
 254                 (mask & OHCI_INTR_RHSC) ? " RHSC" : "",
 255                 (mask & OHCI_INTR_FNO) ? " FNO" : "",
 256                 (mask & OHCI_INTR_UE) ? " UE" : "",
 257                 (mask & OHCI_INTR_RD) ? " RD" : "",
 258                 (mask & OHCI_INTR_SF) ? " SF" : "",
 259                 (mask & OHCI_INTR_WDH) ? " WDH" : "",
 260                 (mask & OHCI_INTR_SO) ? " SO" : ""
 261                 );
 262 }
 263
 264 static void maybe_print_eds(char *label, __u32 value)
 265 {
 266         ed_t *edp = (ed_t *)value;
 267
 268         if (value) {
 269                 dbg("%s %08x", label, value);
 270                 dbg("%08x", edp->hwINFO);
 271                 dbg("%08x", edp->hwTailP);
 272                 dbg("%08x", edp->hwHeadP);
 273                 dbg("%08x", edp->hwNextED);
 274         }
 275 }
 276
 277 static char *hcfs2string(int state)
 278 {
 279         switch (state) {
 280         case OHCI_USB_RESET:    return "reset";
 281         case OHCI_USB_RESUME:   return "resume";
 282         case OHCI_USB_OPER:     return "operational";
 283         case OHCI_USB_SUSPEND:  return "suspend";
 284         }
 285         return "?";
 286 }
 287
 288 /* dump control and status registers */
 289 static void ohci_dump_status(ohci_t *controller)
 290 {
 291         struct ohci_regs        *regs = controller->regs;
 292         __u32                   temp;
 293
 294         temp = ohci_readl(&regs->revision) & 0xff;
 295         if (temp != 0x10)
 296                 dbg("spec %d.%d", (temp >> 4), (temp & 0x0f));
 297
 298         temp = ohci_readl(&regs->control);
 299         dbg("control: 0x%08x%s%s%s HCFS=%s%s%s%s%s CBSR=%d", temp,
 300                 (temp & OHCI_CTRL_RWE) ? " RWE" : "",
 301                 (temp & OHCI_CTRL_RWC) ? " RWC" : "",
 302                 (temp & OHCI_CTRL_IR) ? " IR" : "",
 303                 hcfs2string(temp & OHCI_CTRL_HCFS),
 304                 (temp & OHCI_CTRL_BLE) ? " BLE" : "",
 305                 (temp & OHCI_CTRL_CLE) ? " CLE" : "",
 306                 (temp & OHCI_CTRL_IE) ? " IE" : "",
 307                 (temp & OHCI_CTRL_PLE) ? " PLE" : "",
 308                 temp & OHCI_CTRL_CBSR
 309                 );
 310
 311         temp = ohci_readl(&regs->cmdstatus);
 312         dbg("cmdstatus: 0x%08x SOC=%d%s%s%s%s", temp,
 313                 (temp & OHCI_SOC) >> 16,
 314                 (temp & OHCI_OCR) ? " OCR" : "",
 315                 (temp & OHCI_BLF) ? " BLF" : "",
 316                 (temp & OHCI_CLF) ? " CLF" : "",
 317                 (temp & OHCI_HCR) ? " HCR" : ""
 318                 );
 319
 320         ohci_dump_intr_mask("intrstatus", ohci_readl(&regs->intrstatus));
 321         ohci_dump_intr_mask("intrenable", ohci_readl(&regs->intrenable));
 322
 323         maybe_print_eds("ed_periodcurrent",
 324                         ohci_readl(&regs->ed_periodcurrent));
 325
 326         maybe_print_eds("ed_controlhead", ohci_readl(&regs->ed_controlhead));
 327         maybe_print_eds("ed_controlcurrent",
 328                         ohci_readl(&regs->ed_controlcurrent));
 329
 330         maybe_print_eds("ed_bulkhead", ohci_readl(&regs->ed_bulkhead));
 331         maybe_print_eds("ed_bulkcurrent", ohci_readl(&regs->ed_bulkcurrent));
 332
 333         maybe_print_eds("donehead", ohci_readl(&regs->donehead));
 334 }
 335
 336 static void ohci_dump_roothub(ohci_t *controller, int verbose)
 337 {
 338         __u32                   temp, ndp, i;
 339
 340         temp = roothub_a(controller);
 341         ndp = (temp & RH_A_NDP);
 342 #ifdef CONFIG_AT91C_PQFP_UHPBUG
 343         ndp = (ndp == 2) ? 1:0;
 344 #endif
 345         if (verbose) {
 346                 dbg("roothub.a: %08x POTPGT=%d%s%s%s%s%s NDP=%d", temp,
 347                         ((temp & RH_A_POTPGT) >> 24) & 0xff,
 348                         (temp & RH_A_NOCP) ? " NOCP" : "",
 349                         (temp & RH_A_OCPM) ? " OCPM" : "",
 350                         (temp & RH_A_DT) ? " DT" : "",
 351                         (temp & RH_A_NPS) ? " NPS" : "",
 352                         (temp & RH_A_PSM) ? " PSM" : "",
 353                         ndp
 354                         );
 355                 temp = roothub_b(controller);
 356                 dbg("roothub.b: %08x PPCM=%04x DR=%04x",
 357                         temp,
 358                         (temp & RH_B_PPCM) >> 16,
 359                         (temp & RH_B_DR)
 360                         );
 361                 temp = roothub_status(controller);
 362                 dbg("roothub.status: %08x%s%s%s%s%s%s",
 363                         temp,
 364                         (temp & RH_HS_CRWE) ? " CRWE" : "",
 365                         (temp & RH_HS_OCIC) ? " OCIC" : "",
 366                         (temp & RH_HS_LPSC) ? " LPSC" : "",
 367                         (temp & RH_HS_DRWE) ? " DRWE" : "",
 368                         (temp & RH_HS_OCI) ? " OCI" : "",
 369                         (temp & RH_HS_LPS) ? " LPS" : ""
 370                         );
 371         }
 372
 373         for (i = 0; i < ndp; i++) {
 374                 temp = roothub_portstatus(controller, i);
 375                 dbg("roothub.portstatus [%d] = 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s",
 376                         i,
 377                         temp,
 378                         (temp & RH_PS_PRSC) ? " PRSC" : "",
 379                         (temp & RH_PS_OCIC) ? " OCIC" : "",
 380                         (temp & RH_PS_PSSC) ? " PSSC" : "",
 381                         (temp & RH_PS_PESC) ? " PESC" : "",
 382                         (temp & RH_PS_CSC) ? " CSC" : "",
 383
 384                         (temp & RH_PS_LSDA) ? " LSDA" : "",
 385                         (temp & RH_PS_PPS) ? " PPS" : "",
 386                         (temp & RH_PS_PRS) ? " PRS" : "",
 387                         (temp & RH_PS_POCI) ? " POCI" : "",
 388                         (temp & RH_PS_PSS) ? " PSS" : "",
 389
 390                         (temp & RH_PS_PES) ? " PES" : "",
 391                         (temp & RH_PS_CCS) ? " CCS" : ""
 392                         );
 393         }
 394 }
 395
 396 static void ohci_dump(ohci_t *controller, int verbose)
 397 {
 398         dbg("OHCI controller usb-%s state", controller->slot_name);
 399
 400         /* dumps some of the state we know about */
 401         ohci_dump_status(controller);
 402         if (verbose)
 403                 ep_print_int_eds(controller, "hcca");
 404         dbg("hcca frame #%04x", controller->hcca->frame_no);
 405         ohci_dump_roothub(controller, 1);
 406 }
 407 #endif /* DEBUG */
 408
 409 /*-------------------------------------------------------------------------*
 410  * Interface functions (URB)
 411  *-------------------------------------------------------------------------*/
 412
 413 /* get a transfer request */
 414
 415 int sohci_submit_job(urb_priv_t *urb, struct devrequest *setup)
 416 {
 417         ohci_t *ohci;
 418         ed_t *ed;
 419         urb_priv_t *purb_priv = urb;
 420         int i, size = 0;
 421         struct usb_device *dev = urb->dev;
 422         unsigned long pipe = urb->pipe;
 423         void *buffer = urb->transfer_buffer;
 424         int transfer_len = urb->transfer_buffer_length;
 425         int interval = urb->interval;
 426
 427         ohci = &gohci;
 428
 429         /* when controller's hung, permit only roothub cleanup attempts
 430          * such as powering down ports */
 431         if (ohci->disabled) {
 432                 err("sohci_submit_job: EPIPE");
 433                 return -1;
 434         }
 435
 436         /* we're about to begin a new transaction here so mark the
 437          * URB unfinished */
 438         urb->finished = 0;
 439
 440         /* every endpoint has a ed, locate and fill it */
 441         ed = ep_add_ed(dev, pipe, interval, 1);
 442         if (!ed) {
 443                 err("sohci_submit_job: ENOMEM");
 444                 return -1;
 445         }
 446
 447         /* for the private part of the URB we need the number of TDs (size) */
 448         switch (usb_pipetype(pipe)) {
 449         case PIPE_BULK: /* one TD for every 4096 Byte */
 450                 size = (transfer_len - 1) / 4096 + 1;
 451                 break;
 452         case PIPE_CONTROL:/* 1 TD for setup, 1 for ACK and 1 for every 4096 B */
 453                 size = (transfer_len == 0)? 2:
 454                                         (transfer_len - 1) / 4096 + 3;
 455                 break;
 456         case PIPE_INTERRUPT: /* 1 TD */
 457                 size = 1;
 458                 break;
 459         }
 460
 461         ed->purb = urb;
 462
 463         if (size >= (N_URB_TD - 1)) {
 464                 err("need %d TDs, only have %d", size, N_URB_TD);
 465                 return -1;
 466         }
 467         purb_priv->pipe = pipe;
 468
 469         /* fill the private part of the URB */
 470         purb_priv->length = size;
 471         purb_priv->ed = ed;
 472         purb_priv->actual_length = 0;
 473
 474         /* allocate the TDs */
 475         /* note that td[0] was allocated in ep_add_ed */
 476         for (i = 0; i < size; i++) {
 477                 purb_priv->td[i] = td_alloc(dev);
 478                 if (!purb_priv->td[i]) {
 479                         purb_priv->length = i;
 480                         urb_free_priv(purb_priv);
 481                         err("sohci_submit_job: ENOMEM");
 482                         return -1;
 483                 }
 484         }
 485
 486         if (ed->state == ED_NEW || (ed->state & ED_DEL)) {
 487                 urb_free_priv(purb_priv);
 488                 err("sohci_submit_job: EINVAL");
 489                 return -1;
 490         }
 491
 492         /* link the ed into a chain if is not already */
 493         if (ed->state != ED_OPER)
 494                 ep_link(ohci, ed);
 495
 496         /* fill the TDs and link it to the ed */
 497         td_submit_job(dev, pipe, buffer, transfer_len,
 498                       setup, purb_priv, interval);
 499
 500         return 0;
 501 }
 502
 503 static inline int sohci_return_job(struct ohci *hc, urb_priv_t *urb)
 504 {
 505         struct ohci_regs *regs = hc->regs;
 506
 507         switch (usb_pipetype(urb->pipe)) {
 508         case PIPE_INTERRUPT:
 509                 /* implicitly requeued */
 510                 if (urb->dev->irq_handle &&
 511                                 (urb->dev->irq_act_len = urb->actual_length)) {
 512                         ohci_writel(OHCI_INTR_WDH, &regs->intrenable);
 513                         ohci_readl(&regs->intrenable); /* PCI posting flush */
 514                         urb->dev->irq_handle(urb->dev);
 515                         ohci_writel(OHCI_INTR_WDH, &regs->intrdisable);
 516                         ohci_readl(&regs->intrdisable); /* PCI posting flush */
 517                 }
 518                 urb->actual_length = 0;
 519                 td_submit_job(
 520                                 urb->dev,
 521                                 urb->pipe,
 522                                 urb->transfer_buffer,
 523                                 urb->transfer_buffer_length,
 524                                 NULL,
 525                                 urb,
 526                                 urb->interval);
 527                 break;
 528         case PIPE_CONTROL:
 529         case PIPE_BULK:
 530                 break;
 531         default:
 532                 return 0;
 533         }
 534         return 1;
 535 }
 536
 537 /*-------------------------------------------------------------------------*/
 538
 539 #ifdef DEBUG
 540 /* tell us the current USB frame number */
 541
 542 static int sohci_get_current_frame_number(struct usb_device *usb_dev)
 543 {
 544         ohci_t *ohci = &gohci;
 545
 546         return m16_swap(ohci->hcca->frame_no);
 547 }
 548 #endif
 549
 550 /*-------------------------------------------------------------------------*
 551  * ED handling functions
 552  *-------------------------------------------------------------------------*/
 553
 554 /* search for the right branch to insert an interrupt ed into the int tree
 555  * do some load ballancing;
 556  * returns the branch and
 557  * sets the interval to interval = 2^integer (ld (interval)) */
 558
 559 static int ep_int_ballance(ohci_t *ohci, int interval, int load)
 560 {
 561         int i, branch = 0;
 562
 563         /* search for the least loaded interrupt endpoint
 564          * branch of all 32 branches
 565          */
 566         for (i = 0; i < 32; i++)
 567                 if (ohci->ohci_int_load [branch] > ohci->ohci_int_load [i])
 568                         branch = i;
 569
 570         branch = branch % interval;
 571         for (i = branch; i < 32; i += interval)
 572                 ohci->ohci_int_load [i] += load;
 573
 574         return branch;
 575 }
 576
 577 /*-------------------------------------------------------------------------*/
 578
 579 /*  2^int( ld (inter)) */
 580
 581 static int ep_2_n_interval(int inter)
 582 {
 583         int i;
 584         for (i = 0; ((inter >> i) > 1) && (i < 5); i++);
 585         return 1 << i;
 586 }
 587
 588 /*-------------------------------------------------------------------------*/
 589
 590 /* the int tree is a binary tree
 591  * in order to process it sequentially the indexes of the branches have to
 592  * be mapped the mapping reverses the bits of a word of num_bits length */
 593 static int ep_rev(int num_bits, int word)
 594 {
 595         int i, wout = 0;
 596
 597         for (i = 0; i < num_bits; i++)
 598                 wout |= (((word >> i) & 1) << (num_bits - i - 1));
 599         return wout;
 600 }
 601
 602 /*-------------------------------------------------------------------------*
 603  * ED handling functions
 604  *-------------------------------------------------------------------------*/
 605
 606 /* link an ed into one of the HC chains */
 607
 608 static int ep_link(ohci_t *ohci, ed_t *edi)
 609 {
 610         volatile ed_t *ed = edi;
 611         int int_branch;
 612         int i;
 613         int inter;
 614         int interval;
 615         int load;
 616         __u32 *ed_p;
 617
 618         ed->state = ED_OPER;
 619         ed->int_interval = 0;
 620
 621         switch (ed->type) {
 622         case PIPE_CONTROL:
 623                 ed->hwNextED = 0;
 624                 if (ohci->ed_controltail == NULL)
 625                         ohci_writel(ed, &ohci->regs->ed_controlhead);
 626                 else
 627                         ohci->ed_controltail->hwNextED =
 628                                                    m32_swap((unsigned long)ed);
 629
 630                 ed->ed_prev = ohci->ed_controltail;
 631                 if (!ohci->ed_controltail && !ohci->ed_rm_list[0] &&
 632                         !ohci->ed_rm_list[1] && !ohci->sleeping) {
 633                         ohci->hc_control |= OHCI_CTRL_CLE;
 634                         ohci_writel(ohci->hc_control, &ohci->regs->control);
 635                 }
 636                 ohci->ed_controltail = edi;
 637                 break;
 638
 639         case PIPE_BULK:
 640                 ed->hwNextED = 0;
 641                 if (ohci->ed_bulktail == NULL)
 642                         ohci_writel(ed, &ohci->regs->ed_bulkhead);
 643                 else
 644                         ohci->ed_bulktail->hwNextED =
 645                                                    m32_swap((unsigned long)ed);
 646
 647                 ed->ed_prev = ohci->ed_bulktail;
 648                 if (!ohci->ed_bulktail && !ohci->ed_rm_list[0] &&
 649                         !ohci->ed_rm_list[1] && !ohci->sleeping) {
 650                         ohci->hc_control |= OHCI_CTRL_BLE;
 651                         ohci_writel(ohci->hc_control, &ohci->regs->control);
 652                 }
 653                 ohci->ed_bulktail = edi;
 654                 break;
 655
 656         case PIPE_INTERRUPT:
 657                 load = ed->int_load;
 658                 interval = ep_2_n_interval(ed->int_period);
 659                 ed->int_interval = interval;
 660                 int_branch = ep_int_ballance(ohci, interval, load);
 661                 ed->int_branch = int_branch;
 662
 663                 for (i = 0; i < ep_rev(6, interval); i += inter) {
 664                         inter = 1;
 665                         for (ed_p = &(ohci->hcca->int_table[\
 666                                                 ep_rev(5, i) + int_branch]);
 667                                 (*ed_p != 0) &&
 668                                 (((ed_t *)ed_p)->int_interval >= interval);
 669                                 ed_p = &(((ed_t *)ed_p)->hwNextED))
 670                                         inter = ep_rev(6,
 671                                                  ((ed_t *)ed_p)->int_interval);
 672                         ed->hwNextED = *ed_p;
 673                         *ed_p = m32_swap((unsigned long)ed);
 674                 }
 675                 break;
 676         }
 677         return 0;
 678 }
 679
 680 /*-------------------------------------------------------------------------*/
 681
 682 /* scan the periodic table to find and unlink this ED */
 683 static void periodic_unlink(struct ohci *ohci, volatile struct ed *ed,
 684                             unsigned index, unsigned period)
 685 {
 686         for (; index < NUM_INTS; index += period) {
 687                 __u32   *ed_p = &ohci->hcca->int_table [index];
 688
 689                 /* ED might have been unlinked through another path */
 690                 while (*ed_p != 0) {
 691                         if (((struct ed *)
 692                                         m32_swap((unsigned long)ed_p)) == ed) {
 693                                 *ed_p = ed->hwNextED;
 694                                 break;
 695                         }
 696                         ed_p = &(((struct ed *)
 697                                      m32_swap((unsigned long)ed_p))->hwNextED);
 698                 }
 699         }
 700 }
 701
 702 /* unlink an ed from one of the HC chains.
 703  * just the link to the ed is unlinked.
 704  * the link from the ed still points to another operational ed or 0
 705  * so the HC can eventually finish the processing of the unlinked ed */
 706
 707 static int ep_unlink(ohci_t *ohci, ed_t *edi)
 708 {
 709         volatile ed_t *ed = edi;
 710         int i;
 711
 712         ed->hwINFO |= m32_swap(OHCI_ED_SKIP);
 713
 714         switch (ed->type) {
 715         case PIPE_CONTROL:
 716                 if (ed->ed_prev == NULL) {
 717                         if (!ed->hwNextED) {
 718                                 ohci->hc_control &= ~OHCI_CTRL_CLE;
 719                                 ohci_writel(ohci->hc_control,
 720                                             &ohci->regs->control);
 721                         }
 722                         ohci_writel(m32_swap(*((__u32 *)&ed->hwNextED)),
 723                                 &ohci->regs->ed_controlhead);
 724                 } else {
 725                         ed->ed_prev->hwNextED = ed->hwNextED;
 726                 }
 727                 if (ohci->ed_controltail == ed) {
 728                         ohci->ed_controltail = ed->ed_prev;
 729                 } else {
 730                         ((ed_t *)m32_swap(
 731                             *((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
 732                 }
 733                 break;
 734
 735         case PIPE_BULK:
 736                 if (ed->ed_prev == NULL) {
 737                         if (!ed->hwNextED) {
 738                                 ohci->hc_control &= ~OHCI_CTRL_BLE;
 739                                 ohci_writel(ohci->hc_control,
 740                                             &ohci->regs->control);
 741                         }
 742                         ohci_writel(m32_swap(*((__u32 *)&ed->hwNextED)),
 743                                &ohci->regs->ed_bulkhead);
 744                 } else {
 745                         ed->ed_prev->hwNextED = ed->hwNextED;
 746                 }
 747                 if (ohci->ed_bulktail == ed) {
 748                         ohci->ed_bulktail = ed->ed_prev;
 749                 } else {
 750                         ((ed_t *)m32_swap(
 751                              *((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
 752                 }
 753                 break;
 754
 755         case PIPE_INTERRUPT:
 756                 periodic_unlink(ohci, ed, 0, 1);
 757                 for (i = ed->int_branch; i < 32; i += ed->int_interval)
 758                     ohci->ohci_int_load[i] -= ed->int_load;
 759                 break;
 760         }
 761         ed->state = ED_UNLINK;
 762         return 0;
 763 }
 764
 765 /*-------------------------------------------------------------------------*/
 766
 767 /* add/reinit an endpoint; this should be done once at the
 768  * usb_set_configuration command, but the USB stack is a little bit
 769  * stateless so we do it at every transaction if the state of the ed
 770  * is ED_NEW then a dummy td is added and the state is changed to
 771  * ED_UNLINK in all other cases the state is left unchanged the ed
 772  * info fields are setted anyway even though most of them should not
 773  * change
 774  */
 775 static ed_t *ep_add_ed(struct usb_device *usb_dev, unsigned long pipe,
 776                         int interval, int load)
 777 {
 778         td_t *td;
 779         ed_t *ed_ret;
 780         volatile ed_t *ed;
 781
 782         ed = ed_ret = &ohci_dev.ed[(usb_pipeendpoint(pipe) << 1) |
 783                         (usb_pipecontrol(pipe)? 0: usb_pipeout(pipe))];
 784
 785         if ((ed->state & ED_DEL) || (ed->state & ED_URB_DEL)) {
 786                 err("ep_add_ed: pending delete");
 787                 /* pending delete request */
 788                 return NULL;
 789         }
 790
 791         if (ed->state == ED_NEW) {
 792                 /* dummy td; end of td list for ed */
 793                 td = td_alloc(usb_dev);
 794                 ed->hwTailP = m32_swap((unsigned long)td);
 795                 ed->hwHeadP = ed->hwTailP;
 796                 ed->state = ED_UNLINK;
 797                 ed->type = usb_pipetype(pipe);
 798                 ohci_dev.ed_cnt++;
 799         }
 800
 801         ed->hwINFO = m32_swap(usb_pipedevice(pipe)
 802                         | usb_pipeendpoint(pipe) << 7
 803                         | (usb_pipeisoc(pipe)? 0x8000: 0)
 804                         | (usb_pipecontrol(pipe)? 0: \
 805                                            (usb_pipeout(pipe)? 0x800: 0x1000))
 806                         | usb_pipeslow(pipe) << 13
 807                         | usb_maxpacket(usb_dev, pipe) << 16);
 808
 809         if (ed->type == PIPE_INTERRUPT && ed->state == ED_UNLINK) {
 810                 ed->int_period = interval;
 811                 ed->int_load = load;
 812         }
 813
 814         return ed_ret;
 815 }
 816
 817 /*-------------------------------------------------------------------------*
 818  * TD handling functions
 819  *-------------------------------------------------------------------------*/
 820
 821 /* enqueue next TD for this URB (OHCI spec 5.2.8.2) */
 822
 823 static void td_fill(ohci_t *ohci, unsigned int info,
 824         void *data, int len,
 825         struct usb_device *dev, int index, urb_priv_t *urb_priv)
 826 {
 827         volatile td_t  *td, *td_pt;
 828 #ifdef OHCI_FILL_TRACE
 829         int i;
 830 #endif
 831
 832         if (index > urb_priv->length) {
 833                 err("index > length");
 834                 return;
 835         }
 836         /* use this td as the next dummy */
 837         td_pt = urb_priv->td [index];
 838         td_pt->hwNextTD = 0;
 839
 840         /* fill the old dummy TD */
 841         td = urb_priv->td [index] =
 842                              (td_t *)(m32_swap(urb_priv->ed->hwTailP) & ~0xf);
 843
 844         td->ed = urb_priv->ed;
 845         td->next_dl_td = NULL;
 846         td->index = index;
 847         td->data = (__u32)data;
 848 #ifdef OHCI_FILL_TRACE
 849         if (usb_pipebulk(urb_priv->pipe) && usb_pipeout(urb_priv->pipe)) {
 850                 for (i = 0; i < len; i++)
 851                 printf("td->data[%d] %#2x ", i, ((unsigned char *)td->data)[i]);
 852                 printf("\n");
 853         }
 854 #endif
 855         if (!len)
 856                 data = 0;
 857
 858         td->hwINFO = m32_swap(info);
 859         td->hwCBP = m32_swap((unsigned long)data);
 860         if (data)
 861                 td->hwBE = m32_swap((unsigned long)(data + len - 1));
 862         else
 863                 td->hwBE = 0;
 864
 865         td->hwNextTD = m32_swap((unsigned long)td_pt);
 866
 867         /* append to queue */
 868         td->ed->hwTailP = td->hwNextTD;
 869 }
 870
 871 /*-------------------------------------------------------------------------*/
 872
 873 /* prepare all TDs of a transfer */
 874
 875 static void td_submit_job(struct usb_device *dev, unsigned long pipe,
 876                           void *buffer, int transfer_len,
 877                           struct devrequest *setup, urb_priv_t *urb,
 878                           int interval)
 879 {
 880         ohci_t *ohci = &gohci;
 881         int data_len = transfer_len;
 882         void *data;
 883         int cnt = 0;
 884         __u32 info = 0;
 885         unsigned int toggle = 0;
 886
 887         /* OHCI handles the DATA-toggles itself, we just use the USB-toggle
 888          * bits for reseting */
 889         if (usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe))) {
 890                 toggle = TD_T_TOGGLE;
 891         } else {
 892                 toggle = TD_T_DATA0;
 893                 usb_settoggle(dev, usb_pipeendpoint(pipe),
 894                                 usb_pipeout(pipe), 1);
 895         }
 896         urb->td_cnt = 0;
 897         if (data_len)
 898                 data = buffer;
 899         else
 900                 data = 0;
 901
 902         switch (usb_pipetype(pipe)) {
 903         case PIPE_BULK:
 904                 info = usb_pipeout(pipe)?
 905                         TD_CC | TD_DP_OUT : TD_CC | TD_DP_IN ;
 906                 while (data_len > 4096) {
 907                         td_fill(ohci, info | (cnt? TD_T_TOGGLE:toggle),
 908                                 data, 4096, dev, cnt, urb);
 909                         data += 4096; data_len -= 4096; cnt++;
 910                 }
 911                 info = usb_pipeout(pipe)?
 912                         TD_CC | TD_DP_OUT : TD_CC | TD_R | TD_DP_IN ;
 913                 td_fill(ohci, info | (cnt? TD_T_TOGGLE:toggle), data,
 914                         data_len, dev, cnt, urb);
 915                 cnt++;
 916
 917                 if (!ohci->sleeping) {
 918                         /* start bulk list */
 919                         ohci_writel(OHCI_BLF, &ohci->regs->cmdstatus);
 920                 }
 921                 break;
 922
 923         case PIPE_CONTROL:
 924                 /* Setup phase */
 925                 info = TD_CC | TD_DP_SETUP | TD_T_DATA0;
 926                 td_fill(ohci, info, setup, 8, dev, cnt++, urb);
 927
 928                 /* Optional Data phase */
 929                 if (data_len > 0) {
 930                         info = usb_pipeout(pipe)?
 931                                 TD_CC | TD_R | TD_DP_OUT | TD_T_DATA1 :
 932                                 TD_CC | TD_R | TD_DP_IN | TD_T_DATA1;
 933                         /* NOTE:  mishandles transfers >8K, some >4K */
 934                         td_fill(ohci, info, data, data_len, dev, cnt++, urb);
 935                 }
 936
 937                 /* Status phase */
 938                 info = usb_pipeout(pipe)?
 939                         TD_CC | TD_DP_IN | TD_T_DATA1:
 940                         TD_CC | TD_DP_OUT | TD_T_DATA1;
 941                 td_fill(ohci, info, data, 0, dev, cnt++, urb);
 942
 943                 if (!ohci->sleeping) {
 944                         /* start Control list */
 945                         ohci_writel(OHCI_CLF, &ohci->regs->cmdstatus);
 946                 }
 947                 break;
 948
 949         case PIPE_INTERRUPT:
 950                 info = usb_pipeout(urb->pipe)?
 951                         TD_CC | TD_DP_OUT | toggle:
 952                         TD_CC | TD_R | TD_DP_IN | toggle;
 953                 td_fill(ohci, info, data, data_len, dev, cnt++, urb);
 954                 break;
 955         }
 956         if (urb->length != cnt)
 957                 dbg("TD LENGTH %d != CNT %d", urb->length, cnt);
 958 }
 959
 960 /*-------------------------------------------------------------------------*
 961  * Done List handling functions
 962  *-------------------------------------------------------------------------*/
 963
 964 /* calculate the transfer length and update the urb */
 965
 966 static void dl_transfer_length(td_t *td)
 967 {
 968         __u32 tdINFO, tdBE, tdCBP;
 969         urb_priv_t *lurb_priv = td->ed->purb;
 970
 971         tdINFO = m32_swap(td->hwINFO);
 972         tdBE   = m32_swap(td->hwBE);
 973         tdCBP  = m32_swap(td->hwCBP);
 974
 975         if (!(usb_pipecontrol(lurb_priv->pipe) &&
 976             ((td->index == 0) || (td->index == lurb_priv->length - 1)))) {
 977                 if (tdBE != 0) {
 978                         if (td->hwCBP == 0)
 979                                 lurb_priv->actual_length += tdBE - td->data + 1;
 980                         else
 981                                 lurb_priv->actual_length += tdCBP - td->data;
 982                 }
 983         }
 984 }
 985
 986 /*-------------------------------------------------------------------------*/
 987 static void check_status(td_t *td_list)
 988 {
 989         urb_priv_t *lurb_priv = td_list->ed->purb;
 990         int        urb_len    = lurb_priv->length;
 991         __u32      *phwHeadP  = &td_list->ed->hwHeadP;
 992         int        cc;
 993
 994         cc = TD_CC_GET(m32_swap(td_list->hwINFO));
 995         if (cc) {
 996                 err(" USB-error: %s (%x)", cc_to_string[cc], cc);
 997
 998                 if (*phwHeadP & m32_swap(0x1)) {
 999                         if (lurb_priv &&
1000                             ((td_list->index + 1) < urb_len)) {
1001                                 *phwHeadP =
1002                                         (lurb_priv->td[urb_len - 1]->hwNextTD &\
1003                                                         m32_swap(0xfffffff0)) |
1004                                                    (*phwHeadP & m32_swap(0x2));
1005
1006                                 lurb_priv->td_cnt += urb_len -
1007                                                      td_list->index - 1;
1008                         } else
1009                                 *phwHeadP &= m32_swap(0xfffffff2);
1010                 }
1011 #ifdef CONFIG_MPC5200
1012                 td_list->hwNextTD = 0;
1013 #endif
1014         }
1015 }
1016
1017 /* replies to the request have to be on a FIFO basis so
1018  * we reverse the reversed done-list */
1019 static td_t *dl_reverse_done_list(ohci_t *ohci)
1020 {
1021         __u32 td_list_hc;
1022         td_t *td_rev = NULL;
1023         td_t *td_list = NULL;
1024
1025         td_list_hc = m32_swap(ohci->hcca->done_head) & 0xfffffff0;
1026         ohci->hcca->done_head = 0;
1027
1028         while (td_list_hc) {
1029                 td_list = (td_t *)td_list_hc;
1030                 check_status(td_list);
1031                 td_list->next_dl_td = td_rev;
1032                 td_rev = td_list;
1033                 td_list_hc = m32_swap(td_list->hwNextTD) & 0xfffffff0;
1034         }
1035         return td_list;
1036 }
1037
1038 /*-------------------------------------------------------------------------*/
1039 /*-------------------------------------------------------------------------*/
1040
1041 static void finish_urb(ohci_t *ohci, urb_priv_t *urb, int status)
1042 {
1043         if ((status & (ED_OPER | ED_UNLINK)) && (urb->state != URB_DEL))
1044                 urb->finished = sohci_return_job(ohci, urb);
1045         else
1046                 dbg("finish_urb: strange.., ED state %x, \n", status);
1047 }
1048
1049 /*
1050  * Used to take back a TD from the host controller. This would normally be
1051  * called from within dl_done_list, however it may be called directly if the
1052  * HC no longer sees the TD and it has not appeared on the donelist (after
1053  * two frames).  This bug has been observed on ZF Micro systems.
1054  */
1055 static int takeback_td(ohci_t *ohci, td_t *td_list)
1056 {
1057         ed_t *ed;
1058         int cc;
1059         int stat = 0;
1060         /* urb_t *urb; */
1061         urb_priv_t *lurb_priv;
1062         __u32 tdINFO, edHeadP, edTailP;
1063
1064         tdINFO = m32_swap(td_list->hwINFO);
1065
1066         ed = td_list->ed;
1067         lurb_priv = ed->purb;
1068
1069         dl_transfer_length(td_list);
1070
1071         lurb_priv->td_cnt++;
1072
1073         /* error code of transfer */
1074         cc = TD_CC_GET(tdINFO);
1075         if (cc) {
1076                 err("USB-error: %s (%x)", cc_to_string[cc], cc);
1077                 stat = cc_to_error[cc];
1078         }
1079
1080         /* see if this done list makes for all TD's of current URB,
1081         * and mark the URB finished if so */
1082         if (lurb_priv->td_cnt == lurb_priv->length)
1083                 finish_urb(ohci, lurb_priv, ed->state);
1084
1085         dbg("dl_done_list: processing TD %x, len %x\n",
1086                 lurb_priv->td_cnt, lurb_priv->length);
1087
1088         if (ed->state != ED_NEW && (!usb_pipeint(lurb_priv->pipe))) {
1089                 edHeadP = m32_swap(ed->hwHeadP) & 0xfffffff0;
1090                 edTailP = m32_swap(ed->hwTailP);
1091
1092                 /* unlink eds if they are not busy */
1093                 if ((edHeadP == edTailP) && (ed->state == ED_OPER))
1094                         ep_unlink(ohci, ed);
1095         }
1096         return stat;
1097 }
1098
1099 static int dl_done_list(ohci_t *ohci)
1100 {
1101         int stat = 0;
1102         td_t    *td_list = dl_reverse_done_list(ohci);
1103
1104         while (td_list) {
1105                 td_t    *td_next = td_list->next_dl_td;
1106                 stat = takeback_td(ohci, td_list);
1107                 td_list = td_next;
1108         }
1109         return stat;
1110 }
1111
1112 /*-------------------------------------------------------------------------*
1113  * Virtual Root Hub
1114  *-------------------------------------------------------------------------*/
1115
1116 /* Device descriptor */
1117 static __u8 root_hub_dev_des[] =
1118 {
1119         0x12,       /*  __u8  bLength; */
1120         0x01,       /*  __u8  bDescriptorType; Device */
1121         0x10,       /*  __u16 bcdUSB; v1.1 */
1122         0x01,
1123         0x09,       /*  __u8  bDeviceClass; HUB_CLASSCODE */
1124         0x00,       /*  __u8  bDeviceSubClass; */
1125         0x00,       /*  __u8  bDeviceProtocol; */
1126         0x08,       /*  __u8  bMaxPacketSize0; 8 Bytes */
1127         0x00,       /*  __u16 idVendor; */
1128         0x00,
1129         0x00,       /*  __u16 idProduct; */
1130         0x00,
1131         0x00,       /*  __u16 bcdDevice; */
1132         0x00,
1133         0x00,       /*  __u8  iManufacturer; */
1134         0x01,       /*  __u8  iProduct; */
1135         0x00,       /*  __u8  iSerialNumber; */
1136         0x01        /*  __u8  bNumConfigurations; */
1137 };
1138
1139 /* Configuration descriptor */
1140 static __u8 root_hub_config_des[] =
1141 {
1142         0x09,       /*  __u8  bLength; */
1143         0x02,       /*  __u8  bDescriptorType; Configuration */
1144         0x19,       /*  __u16 wTotalLength; */
1145         0x00,
1146         0x01,       /*  __u8  bNumInterfaces; */
1147         0x01,       /*  __u8  bConfigurationValue; */
1148         0x00,       /*  __u8  iConfiguration; */
1149         0x40,       /*  __u8  bmAttributes;
1150          Bit 7: Bus-powered, 6: Self-powered, 5 Remote-wakwup, 4..0: resvd */
1151         0x00,       /*  __u8  MaxPower; */
1152
1153         /* interface */
1154         0x09,       /*  __u8  if_bLength; */
1155         0x04,       /*  __u8  if_bDescriptorType; Interface */
1156         0x00,       /*  __u8  if_bInterfaceNumber; */
1157         0x00,       /*  __u8  if_bAlternateSetting; */
1158         0x01,       /*  __u8  if_bNumEndpoints; */
1159         0x09,       /*  __u8  if_bInterfaceClass; HUB_CLASSCODE */
1160         0x00,       /*  __u8  if_bInterfaceSubClass; */
1161         0x00,       /*  __u8  if_bInterfaceProtocol; */
1162         0x00,       /*  __u8  if_iInterface; */
1163
1164         /* endpoint */
1165         0x07,       /*  __u8  ep_bLength; */
1166         0x05,       /*  __u8  ep_bDescriptorType; Endpoint */
1167         0x81,       /*  __u8  ep_bEndpointAddress; IN Endpoint 1 */
1168         0x03,       /*  __u8  ep_bmAttributes; Interrupt */
1169         0x02,       /*  __u16 ep_wMaxPacketSize; ((MAX_ROOT_PORTS + 1) / 8 */
1170         0x00,
1171         0xff        /*  __u8  ep_bInterval; 255 ms */
1172 };
1173
1174 static unsigned char root_hub_str_index0[] =
1175 {
1176         0x04,                   /*  __u8  bLength; */
1177         0x03,                   /*  __u8  bDescriptorType; String-descriptor */
1178         0x09,                   /*  __u8  lang ID */
1179         0x04,                   /*  __u8  lang ID */
1180 };
1181
1182 static unsigned char root_hub_str_index1[] =
1183 {
1184         28,                     /*  __u8  bLength; */
1185         0x03,                   /*  __u8  bDescriptorType; String-descriptor */
1186         'O',                    /*  __u8  Unicode */
1187         0,                              /*  __u8  Unicode */
1188         'H',                    /*  __u8  Unicode */
1189         0,                              /*  __u8  Unicode */
1190         'C',                    /*  __u8  Unicode */
1191         0,                              /*  __u8  Unicode */
1192         'I',                    /*  __u8  Unicode */
1193         0,                              /*  __u8  Unicode */
1194         ' ',                    /*  __u8  Unicode */
1195         0,                              /*  __u8  Unicode */
1196         'R',                    /*  __u8  Unicode */
1197         0,                              /*  __u8  Unicode */
1198         'o',                    /*  __u8  Unicode */
1199         0,                              /*  __u8  Unicode */
1200         'o',                    /*  __u8  Unicode */
1201         0,                              /*  __u8  Unicode */
1202         't',                    /*  __u8  Unicode */
1203         0,                              /*  __u8  Unicode */
1204         ' ',                    /*  __u8  Unicode */
1205         0,                              /*  __u8  Unicode */
1206         'H',                    /*  __u8  Unicode */
1207         0,                              /*  __u8  Unicode */
1208         'u',                    /*  __u8  Unicode */
1209         0,                              /*  __u8  Unicode */
1210         'b',                    /*  __u8  Unicode */
1211         0,                              /*  __u8  Unicode */
1212 };
1213
1214 /* Hub class-specific descriptor is constructed dynamically */
1215
1216 /*-------------------------------------------------------------------------*/
1217
1218 #define OK(x)                   len = (x); break
1219 #ifdef DEBUG
1220 #define WR_RH_STAT(x)           {info("WR:status %#8x", (x)); ohci_writel((x), \
1221                                                 &gohci.regs->roothub.status); }
1222 #define WR_RH_PORTSTAT(x)       {info("WR:portstatus[%d] %#8x", wIndex-1, \
1223         (x)); ohci_writel((x), &gohci.regs->roothub.portstatus[wIndex-1]); }
1224 #else
1225 #define WR_RH_STAT(x)           ohci_writel((x), &gohci.regs->roothub.status)
1226 #define WR_RH_PORTSTAT(x)       ohci_writel((x), \
1227                                     &gohci.regs->roothub.portstatus[wIndex-1])
1228 #endif
1229 #define RD_RH_STAT              roothub_status(&gohci)
1230 #define RD_RH_PORTSTAT          roothub_portstatus(&gohci, wIndex-1)
1231
1232 /* request to virtual root hub */
1233
1234 int rh_check_port_status(ohci_t *controller)
1235 {
1236         __u32 temp, ndp, i;
1237         int res;
1238
1239         res = -1;
1240         temp = roothub_a(controller);
1241         ndp = (temp & RH_A_NDP);
1242 #ifdef CONFIG_AT91C_PQFP_UHPBUG
1243         ndp = (ndp == 2) ? 1:0;
1244 #endif
1245         for (i = 0; i < ndp; i++) {
1246                 temp = roothub_portstatus(controller, i);
1247                 /* check for a device disconnect */
1248                 if (((temp & (RH_PS_PESC | RH_PS_CSC)) ==
1249                         (RH_PS_PESC | RH_PS_CSC)) &&
1250                         ((temp & RH_PS_CCS) == 0)) {
1251                         res = i;
1252                         break;
1253                 }
1254         }
1255         return res;
1256 }
1257
1258 static int ohci_submit_rh_msg(struct usb_device *dev, unsigned long pipe,
1259                 void *buffer, int transfer_len, struct devrequest *cmd)
1260 {
1261         void *data = buffer;
1262         int leni = transfer_len;
1263         int len = 0;
1264         int stat = 0;
1265         __u32 datab[4];
1266         __u8 *data_buf = (__u8 *)datab;
1267         __u16 bmRType_bReq;
1268         __u16 wValue;
1269         __u16 wIndex;
1270         __u16 wLength;
1271
1272 #ifdef DEBUG
1273 pkt_print(NULL, dev, pipe, buffer, transfer_len,
1274           cmd, "SUB(rh)", usb_pipein(pipe));
1275 #else
1276         wait_ms(1);
1277 #endif
1278         if (usb_pipeint(pipe)) {
1279                 info("Root-Hub submit IRQ: NOT implemented");
1280                 return 0;
1281         }
1282
1283         bmRType_bReq  = cmd->requesttype | (cmd->request << 8);
1284         wValue        = le16_to_cpu(cmd->value);
1285         wIndex        = le16_to_cpu(cmd->index);
1286         wLength       = le16_to_cpu(cmd->length);
1287
1288         info("Root-Hub: adr: %2x cmd(%1x): %08x %04x %04x %04x",
1289                 dev->devnum, 8, bmRType_bReq, wValue, wIndex, wLength);
1290
1291         switch (bmRType_bReq) {
1292         /* Request Destination:
1293            without flags: Device,
1294            RH_INTERFACE: interface,
1295            RH_ENDPOINT: endpoint,
1296            RH_CLASS means HUB here,
1297            RH_OTHER | RH_CLASS  almost ever means HUB_PORT here
1298         */
1299
1300         case RH_GET_STATUS:
1301                 *(__u16 *) data_buf = cpu_to_le16(1);
1302                 OK(2);
1303         case RH_GET_STATUS | RH_INTERFACE:
1304                 *(__u16 *) data_buf = cpu_to_le16(0);
1305                 OK(2);
1306         case RH_GET_STATUS | RH_ENDPOINT:
1307                 *(__u16 *) data_buf = cpu_to_le16(0);
1308                 OK(2);
1309         case RH_GET_STATUS | RH_CLASS:
1310                 *(__u32 *) data_buf = cpu_to_le32(
1311                                 RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE));
1312                 OK(4);
1313         case RH_GET_STATUS | RH_OTHER | RH_CLASS:
1314                 *(__u32 *) data_buf = cpu_to_le32(RD_RH_PORTSTAT);
1315                 OK(4);
1316
1317         case RH_CLEAR_FEATURE | RH_ENDPOINT:
1318                 switch (wValue) {
1319                 case (RH_ENDPOINT_STALL):
1320                         OK(0);
1321                 }
1322                 break;
1323
1324         case RH_CLEAR_FEATURE | RH_CLASS:
1325                 switch (wValue) {
1326                 case RH_C_HUB_LOCAL_POWER:
1327                         OK(0);
1328                 case (RH_C_HUB_OVER_CURRENT):
1329                         WR_RH_STAT(RH_HS_OCIC);
1330                         OK(0);
1331                 }
1332                 break;
1333
1334         case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
1335                 switch (wValue) {
1336                 case (RH_PORT_ENABLE):        WR_RH_PORTSTAT(RH_PS_CCS);  OK(0);
1337                 case (RH_PORT_SUSPEND):       WR_RH_PORTSTAT(RH_PS_POCI); OK(0);
1338                 case (RH_PORT_POWER):         WR_RH_PORTSTAT(RH_PS_LSDA); OK(0);
1339                 case (RH_C_PORT_CONNECTION):  WR_RH_PORTSTAT(RH_PS_CSC);  OK(0);
1340                 case (RH_C_PORT_ENABLE):      WR_RH_PORTSTAT(RH_PS_PESC); OK(0);
1341                 case (RH_C_PORT_SUSPEND):     WR_RH_PORTSTAT(RH_PS_PSSC); OK(0);
1342                 case (RH_C_PORT_OVER_CURRENT):WR_RH_PORTSTAT(RH_PS_OCIC); OK(0);
1343                 case (RH_C_PORT_RESET):       WR_RH_PORTSTAT(RH_PS_PRSC); OK(0);
1344                 }
1345                 break;
1346
1347         case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
1348                 switch (wValue) {
1349                 case (RH_PORT_SUSPEND):
1350                         WR_RH_PORTSTAT(RH_PS_PSS);  OK(0);
1351                 case (RH_PORT_RESET): /* BUG IN HUP CODE *********/
1352                         if (RD_RH_PORTSTAT & RH_PS_CCS)
1353                                 WR_RH_PORTSTAT(RH_PS_PRS);
1354                         OK(0);
1355                 case (RH_PORT_POWER):
1356                         WR_RH_PORTSTAT(RH_PS_PPS);
1357                         wait_ms(100);
1358                         OK(0);
1359                 case (RH_PORT_ENABLE): /* BUG IN HUP CODE *********/
1360                         if (RD_RH_PORTSTAT & RH_PS_CCS)
1361                                 WR_RH_PORTSTAT(RH_PS_PES);
1362                         OK(0);
1363                 }
1364                 break;
1365
1366         case RH_SET_ADDRESS:
1367                 gohci.rh.devnum = wValue;
1368                 OK(0);
1369
1370         case RH_GET_DESCRIPTOR:
1371                 switch ((wValue & 0xff00) >> 8) {
1372                 case (0x01): /* device descriptor */
1373                         len = min_t(unsigned int,
1374                                         leni,
1375                                         min_t(unsigned int,
1376                                         sizeof(root_hub_dev_des),
1377                                         wLength));
1378                         data_buf = root_hub_dev_des; OK(len);
1379                 case (0x02): /* configuration descriptor */
1380                         len = min_t(unsigned int,
1381                                         leni,
1382                                         min_t(unsigned int,
1383                                         sizeof(root_hub_config_des),
1384                                         wLength));
1385                         data_buf = root_hub_config_des; OK(len);
1386                 case (0x03): /* string descriptors */
1387                         if (wValue == 0x0300) {
1388                                 len = min_t(unsigned int,
1389                                                 leni,
1390                                                 min_t(unsigned int,
1391                                                 sizeof(root_hub_str_index0),
1392                                                 wLength));
1393                                 data_buf = root_hub_str_index0;
1394                                 OK(len);
1395                         }
1396                         if (wValue == 0x0301) {
1397                                 len = min_t(unsigned int,
1398                                                 leni,
1399                                                 min_t(unsigned int,
1400                                                 sizeof(root_hub_str_index1),
1401                                                 wLength));
1402                                 data_buf = root_hub_str_index1;
1403                                 OK(len);
1404                 }
1405                 default:
1406                         stat = USB_ST_STALLED;
1407                 }
1408                 break;
1409
1410         case RH_GET_DESCRIPTOR | RH_CLASS:
1411         {
1412                 __u32 temp = roothub_a(&gohci);
1413
1414                 data_buf [0] = 9;               /* min length; */
1415                 data_buf [1] = 0x29;
1416                 data_buf [2] = temp & RH_A_NDP;
1417 #ifdef CONFIG_AT91C_PQFP_UHPBUG
1418                 data_buf [2] = (data_buf [2] == 2) ? 1:0;
1419 #endif
1420                 data_buf [3] = 0;
1421                 if (temp & RH_A_PSM)    /* per-port power switching? */
1422                         data_buf [3] |= 0x1;
1423                 if (temp & RH_A_NOCP)   /* no overcurrent reporting? */
1424                         data_buf [3] |= 0x10;
1425                 else if (temp & RH_A_OCPM)/* per-port overcurrent reporting? */
1426                         data_buf [3] |= 0x8;
1427
1428                 /* corresponds to data_buf[4-7] */
1429                 datab [1] = 0;
1430                 data_buf [5] = (temp & RH_A_POTPGT) >> 24;
1431                 temp = roothub_b(&gohci);
1432                 data_buf [7] = temp & RH_B_DR;
1433                 if (data_buf [2] < 7) {
1434                         data_buf [8] = 0xff;
1435                 } else {
1436                         data_buf [0] += 2;
1437                         data_buf [8] = (temp & RH_B_DR) >> 8;
1438                         data_buf [10] = data_buf [9] = 0xff;
1439                 }
1440
1441                 len = min_t(unsigned int, leni,
1442                             min_t(unsigned int, data_buf [0], wLength));
1443                 OK(len);
1444         }
1445
1446         case RH_GET_CONFIGURATION:      *(__u8 *) data_buf = 0x01; OK(1);
1447
1448         case RH_SET_CONFIGURATION:      WR_RH_STAT(0x10000); OK(0);
1449
1450         default:
1451                 dbg("unsupported root hub command");
1452                 stat = USB_ST_STALLED;
1453         }
1454
1455 #ifdef  DEBUG
1456         ohci_dump_roothub(&gohci, 1);
1457 #else
1458         wait_ms(1);
1459 #endif
1460
1461         len = min_t(int, len, leni);
1462         if (data != data_buf)
1463             memcpy(data, data_buf, len);
1464         dev->act_len = len;
1465         dev->status = stat;
1466
1467 #ifdef DEBUG
1468         pkt_print(NULL, dev, pipe, buffer,
1469                   transfer_len, cmd, "RET(rh)", 0/*usb_pipein(pipe)*/);
1470 #else
1471         wait_ms(1);
1472 #endif
1473
1474         return stat;
1475 }
1476
1477 /*-------------------------------------------------------------------------*/
1478
1479 /* common code for handling submit messages - used for all but root hub */
1480 /* accesses. */
1481 int submit_common_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1482                 int transfer_len, struct devrequest *setup, int interval)
1483 {
1484         int stat = 0;
1485         int maxsize = usb_maxpacket(dev, pipe);
1486         int timeout;
1487         urb_priv_t *urb;
1488
1489         urb = malloc(sizeof(urb_priv_t));
1490         memset(urb, 0, sizeof(urb_priv_t));
1491
1492         urb->dev = dev;
1493         urb->pipe = pipe;
1494         urb->transfer_buffer = buffer;
1495         urb->transfer_buffer_length = transfer_len;
1496         urb->interval = interval;
1497
1498         /* device pulled? Shortcut the action. */
1499         if (devgone == dev) {
1500                 dev->status = USB_ST_CRC_ERR;
1501                 return 0;
1502         }
1503
1504 #ifdef DEBUG
1505         urb->actual_length = 0;
1506         pkt_print(urb, dev, pipe, buffer, transfer_len,
1507                   setup, "SUB", usb_pipein(pipe));
1508 #else
1509         wait_ms(1);
1510 #endif
1511         if (!maxsize) {
1512                 err("submit_common_message: pipesize for pipe %lx is zero",
1513                         pipe);
1514                 return -1;
1515         }
1516
1517         if (sohci_submit_job(urb, setup) < 0) {
1518                 err("sohci_submit_job failed");
1519                 return -1;
1520         }
1521
1522 #if 0
1523         wait_ms(10);
1524         /* ohci_dump_status(&gohci); */
1525 #endif
1526
1527         /* allow more time for a BULK device to react - some are slow */
1528 #define BULK_TO  5000   /* timeout in milliseconds */
1529         if (usb_pipebulk(pipe))
1530                 timeout = BULK_TO;
1531         else
1532                 timeout = 100;
1533
1534         /* wait for it to complete */
1535         for (;;) {
1536                 /* check whether the controller is done */
1537                 stat = hc_interrupt();
1538                 if (stat < 0) {
1539                         stat = USB_ST_CRC_ERR;
1540                         break;
1541                 }
1542
1543                 /* NOTE: since we are not interrupt driven in U-Boot and always
1544                  * handle only one URB at a time, we cannot assume the
1545                  * transaction finished on the first successful return from
1546                  * hc_interrupt().. unless the flag for current URB is set,
1547                  * meaning that all TD's to/from device got actually
1548                  * transferred and processed. If the current URB is not
1549                  * finished we need to re-iterate this loop so as
1550                  * hc_interrupt() gets called again as there needs to be some
1551                  * more TD's to process still */
1552                 if ((stat >= 0) && (stat != 0xff) && (urb->finished)) {
1553                         /* 0xff is returned for an SF-interrupt */
1554                         break;
1555                 }
1556
1557                 if (--timeout) {
1558                         wait_ms(1);
1559                         if (!urb->finished)
1560                                 dbg("*");
1561
1562                 } else {
1563                         err("CTL:TIMEOUT ");
1564                         dbg("submit_common_msg: TO status %x\n", stat);
1565                         urb->finished = 1;
1566                         stat = USB_ST_CRC_ERR;
1567                         break;
1568                 }
1569         }
1570
1571         dev->status = stat;
1572         dev->act_len = transfer_len;
1573
1574 #ifdef DEBUG
1575         pkt_print(urb, dev, pipe, buffer, transfer_len,
1576                   setup, "RET(ctlr)", usb_pipein(pipe));
1577 #else
1578         wait_ms(1);
1579 #endif
1580
1581         /* free TDs in urb_priv */
1582         if (!usb_pipeint(pipe))
1583                 urb_free_priv(urb);
1584         return 0;
1585 }
1586
1587 /* submit routines called from usb.c */
1588 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1589                 int transfer_len)
1590 {
1591         info("submit_bulk_msg");
1592         return submit_common_msg(dev, pipe, buffer, transfer_len, NULL, 0);
1593 }
1594
1595 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1596                 int transfer_len, struct devrequest *setup)
1597 {
1598         int maxsize = usb_maxpacket(dev, pipe);
1599
1600         info("submit_control_msg");
1601 #ifdef DEBUG
1602         pkt_print(NULL, dev, pipe, buffer, transfer_len,
1603                   setup, "SUB", usb_pipein(pipe));
1604 #else
1605         wait_ms(1);
1606 #endif
1607         if (!maxsize) {
1608                 err("submit_control_message: pipesize for pipe %lx is zero",
1609                         pipe);
1610                 return -1;
1611         }
1612         if (((pipe >> 8) & 0x7f) == gohci.rh.devnum) {
1613                 gohci.rh.dev = dev;
1614                 /* root hub - redirect */
1615                 return ohci_submit_rh_msg(dev, pipe, buffer, transfer_len,
1616                         setup);
1617         }
1618
1619         return submit_common_msg(dev, pipe, buffer, transfer_len, setup, 0);
1620 }
1621
1622 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1623                 int transfer_len, int interval)
1624 {
1625         info("submit_int_msg");
1626         return submit_common_msg(dev, pipe, buffer, transfer_len, NULL,
1627                         interval);
1628 }
1629
1630 /*-------------------------------------------------------------------------*
1631  * HC functions
1632  *-------------------------------------------------------------------------*/
1633
1634 /* reset the HC and BUS */
1635
1636 static int hc_reset(ohci_t *ohci)
1637 {
1638 #ifdef CONFIG_PCI_EHCI_DEVNO
1639         pci_dev_t pdev;
1640 #endif
1641         int timeout = 30;
1642         int smm_timeout = 50; /* 0,5 sec */
1643
1644         dbg("%s\n", __FUNCTION__);
1645
1646 #ifdef CONFIG_PCI_EHCI_DEVNO
1647         /*
1648          *  Some multi-function controllers (e.g. ISP1562) allow root hub
1649          * resetting via EHCI registers only.
1650          */
1651         pdev = pci_find_devices(ehci_pci_ids, CONFIG_PCI_EHCI_DEVNO);
1652         if (pdev != -1) {
1653                 u32 base;
1654                 int timeout = 1000;
1655
1656                 pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &base);
1657                 base += EHCI_USBCMD_OFF;
1658                 ohci_writel(ohci_readl(base) | EHCI_USBCMD_HCRESET, base);
1659
1660                 while (ohci_readl(base) & EHCI_USBCMD_HCRESET) {
1661                         if (timeout-- <= 0) {
1662                                 printf("USB RootHub reset timed out!");
1663                                 break;
1664                         }
1665                         udelay(1);
1666                 }
1667         } else
1668                 printf("No EHCI func at %d index!\n", CONFIG_PCI_EHCI_DEVNO);
1669 #endif
1670         if (ohci_readl(&ohci->regs->control) & OHCI_CTRL_IR) {
1671                 /* SMM owns the HC, request ownership */
1672                 ohci_writel(OHCI_OCR, &ohci->regs->cmdstatus);
1673                 info("USB HC TakeOver from SMM");
1674                 while (ohci_readl(&ohci->regs->control) & OHCI_CTRL_IR) {
1675                         wait_ms(10);
1676                         if (--smm_timeout == 0) {
1677                                 err("USB HC TakeOver failed!");
1678                                 return -1;
1679                         }
1680                 }
1681         }
1682
1683         /* Disable HC interrupts */
1684         ohci_writel(OHCI_INTR_MIE, &ohci->regs->intrdisable);
1685
1686         dbg("USB HC reset_hc usb-%s: ctrl = 0x%X ;\n",
1687                 ohci->slot_name,
1688                 ohci_readl(&ohci->regs->control));
1689
1690         /* Reset USB (needed by some controllers) */
1691         ohci->hc_control = 0;
1692         ohci_writel(ohci->hc_control, &ohci->regs->control);
1693
1694         /* HC Reset requires max 10 us delay */
1695         ohci_writel(OHCI_HCR,  &ohci->regs->cmdstatus);
1696         while ((ohci_readl(&ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
1697                 if (--timeout == 0) {
1698                         err("USB HC reset timed out!");
1699                         return -1;
1700                 }
1701                 udelay(1);
1702         }
1703         return 0;
1704 }
1705
1706 /*-------------------------------------------------------------------------*/
1707
1708 /* Start an OHCI controller, set the BUS operational
1709  * enable interrupts
1710  * connect the virtual root hub */
1711
1712 static int hc_start(ohci_t *ohci)
1713 {
1714         __u32 mask;
1715         unsigned int fminterval;
1716
1717         ohci->disabled = 1;
1718
1719         /* Tell the controller where the control and bulk lists are
1720          * The lists are empty now. */
1721
1722         ohci_writel(0, &ohci->regs->ed_controlhead);
1723         ohci_writel(0, &ohci->regs->ed_bulkhead);
1724
1725         ohci_writel((__u32)ohci->hcca,
1726                     &ohci->regs->hcca); /* reset clears this */
1727
1728         fminterval = 0x2edf;
1729         ohci_writel((fminterval * 9) / 10, &ohci->regs->periodicstart);
1730         fminterval |= ((((fminterval - 210) * 6) / 7) << 16);
1731         ohci_writel(fminterval, &ohci->regs->fminterval);
1732         ohci_writel(0x628, &ohci->regs->lsthresh);
1733
1734         /* start controller operations */
1735         ohci->hc_control = OHCI_CONTROL_INIT | OHCI_USB_OPER;
1736         ohci->disabled = 0;
1737         ohci_writel(ohci->hc_control, &ohci->regs->control);
1738
1739         /* disable all interrupts */
1740         mask = (OHCI_INTR_SO | OHCI_INTR_WDH | OHCI_INTR_SF | OHCI_INTR_RD |
1741                         OHCI_INTR_UE | OHCI_INTR_FNO | OHCI_INTR_RHSC |
1742                         OHCI_INTR_OC | OHCI_INTR_MIE);
1743         ohci_writel(mask, &ohci->regs->intrdisable);
1744         /* clear all interrupts */
1745         mask &= ~OHCI_INTR_MIE;
1746         ohci_writel(mask, &ohci->regs->intrstatus);
1747         /* Choose the interrupts we care about now  - but w/o MIE */
1748         mask = OHCI_INTR_RHSC | OHCI_INTR_UE | OHCI_INTR_WDH | OHCI_INTR_SO;
1749         ohci_writel(mask, &ohci->regs->intrenable);
1750
1751 #ifdef  OHCI_USE_NPS
1752         /* required for AMD-756 and some Mac platforms */
1753         ohci_writel((roothub_a(ohci) | RH_A_NPS) & ~RH_A_PSM,
1754                 &ohci->regs->roothub.a);
1755         ohci_writel(RH_HS_LPSC, &ohci->regs->roothub.status);
1756 #endif  /* OHCI_USE_NPS */
1757
1758 #define mdelay(n) ({unsigned long msec = (n); while (msec--) udelay(1000); })
1759         /* POTPGT delay is bits 24-31, in 2 ms units. */
1760         mdelay((roothub_a(ohci) >> 23) & 0x1fe);
1761
1762         /* connect the virtual root hub */
1763         ohci->rh.devnum = 0;
1764
1765         return 0;
1766 }
1767
1768 /*-------------------------------------------------------------------------*/
1769
1770 /* Poll USB interrupt. */
1771 void usb_event_poll(void)
1772 {
1773         hc_interrupt();
1774 }
1775
1776 /* an interrupt happens */
1777
1778 static int hc_interrupt(void)
1779 {
1780         ohci_t *ohci = &gohci;
1781         struct ohci_regs *regs = ohci->regs;
1782         int ints;
1783         int stat = -1;
1784
1785         if ((ohci->hcca->done_head != 0) &&
1786                                 !(m32_swap(ohci->hcca->done_head) & 0x01)) {
1787                 ints =  OHCI_INTR_WDH;
1788         } else {
1789                 ints = ohci_readl(&regs->intrstatus);
1790                 if (ints == ~(u32)0) {
1791                         ohci->disabled++;
1792                         err("%s device removed!", ohci->slot_name);
1793                         return -1;
1794                 } else {
1795                         ints &= ohci_readl(&regs->intrenable);
1796                         if (ints == 0) {
1797                                 dbg("hc_interrupt: returning..\n");
1798                                 return 0xff;
1799                         }
1800                 }
1801         }
1802
1803         /* dbg("Interrupt: %x frame: %x", ints,
1804                                         le16_to_cpu(ohci->hcca->frame_no)); */
1805
1806         if (ints & OHCI_INTR_RHSC)
1807                 stat = 0xff;
1808
1809         if (ints & OHCI_INTR_UE) {
1810                 ohci->disabled++;
1811                 err("OHCI Unrecoverable Error, controller usb-%s disabled",
1812                         ohci->slot_name);
1813                 /* e.g. due to PCI Master/Target Abort */
1814
1815 #ifdef  DEBUG
1816                 ohci_dump(ohci, 1);
1817 #else
1818                 wait_ms(1);
1819 #endif
1820                 /* FIXME: be optimistic, hope that bug won't repeat often. */
1821                 /* Make some non-interrupt context restart the controller. */
1822                 /* Count and limit the retries though; either hardware or */
1823                 /* software errors can go forever... */
1824                 hc_reset(ohci);
1825                 return -1;
1826         }
1827
1828         if (ints & OHCI_INTR_WDH) {
1829                 wait_ms(1);
1830                 ohci_writel(OHCI_INTR_WDH, &regs->intrdisable);
1831                 (void)ohci_readl(&regs->intrdisable); /* flush */
1832                 stat = dl_done_list(&gohci);
1833                 ohci_writel(OHCI_INTR_WDH, &regs->intrenable);
1834                 (void)ohci_readl(&regs->intrdisable); /* flush */
1835         }
1836
1837         if (ints & OHCI_INTR_SO) {
1838                 dbg("USB Schedule overrun\n");
1839                 ohci_writel(OHCI_INTR_SO, &regs->intrenable);
1840                 stat = -1;
1841         }
1842
1843         /* FIXME:  this assumes SOF (1/ms) interrupts don't get lost... */
1844         if (ints & OHCI_INTR_SF) {
1845                 unsigned int frame = m16_swap(ohci->hcca->frame_no) & 1;
1846                 wait_ms(1);
1847                 ohci_writel(OHCI_INTR_SF, &regs->intrdisable);
1848                 if (ohci->ed_rm_list[frame] != NULL)
1849                         ohci_writel(OHCI_INTR_SF, &regs->intrenable);
1850                 stat = 0xff;
1851         }
1852
1853         ohci_writel(ints, &regs->intrstatus);
1854         return stat;
1855 }
1856
1857 /*-------------------------------------------------------------------------*/
1858
1859 /*-------------------------------------------------------------------------*/
1860
1861 /* De-allocate all resources.. */
1862
1863 static void hc_release_ohci(ohci_t *ohci)
1864 {
1865         dbg("USB HC release ohci usb-%s", ohci->slot_name);
1866
1867         if (!ohci->disabled)
1868                 hc_reset(ohci);
1869 }
1870
1871 /*-------------------------------------------------------------------------*/
1872
1873 /*
1874  * low level initalisation routine, called from usb.c
1875  */
1876 static char ohci_inited = 0;
1877
1878 int usb_lowlevel_init(void)
1879 {
1880 #ifdef CONFIG_PCI_OHCI
1881         pci_dev_t pdev;
1882 #endif
1883
1884 #ifdef CONFIG_SYS_USB_OHCI_CPU_INIT
1885         /* cpu dependant init */
1886         if (usb_cpu_init())
1887                 return -1;
1888 #endif
1889
1890 #ifdef CONFIG_SYS_USB_OHCI_BOARD_INIT
1891         /*  board dependant init */
1892         if (usb_board_init())
1893                 return -1;
1894 #endif
1895         memset(&gohci, 0, sizeof(ohci_t));
1896
1897         /* align the storage */
1898         if ((__u32)&ghcca[0] & 0xff) {
1899                 err("HCCA not aligned!!");
1900                 return -1;
1901         }
1902         phcca = &ghcca[0];
1903         info("aligned ghcca %p", phcca);
1904         memset(&ohci_dev, 0, sizeof(struct ohci_device));
1905         if ((__u32)&ohci_dev.ed[0] & 0x7) {
1906                 err("EDs not aligned!!");
1907                 return -1;
1908         }
1909         memset(gtd, 0, sizeof(td_t) * (NUM_TD + 1));
1910         if ((__u32)gtd & 0x7) {
1911                 err("TDs not aligned!!");
1912                 return -1;
1913         }
1914         ptd = gtd;
1915         gohci.hcca = phcca;
1916         memset(phcca, 0, sizeof(struct ohci_hcca));
1917
1918         gohci.disabled = 1;
1919         gohci.sleeping = 0;
1920         gohci.irq = -1;
1921 #ifdef CONFIG_PCI_OHCI
1922         pdev = pci_find_devices(ohci_pci_ids, CONFIG_PCI_OHCI_DEVNO);
1923
1924         if (pdev != -1) {
1925                 u16 vid, did;
1926                 u32 base;
1927                 pci_read_config_word(pdev, PCI_VENDOR_ID, &vid);
1928                 pci_read_config_word(pdev, PCI_DEVICE_ID, &did);
1929                 printf("OHCI pci controller (%04x, %04x) found @(%d:%d:%d)\n",
1930                                 vid, did, (pdev >> 16) & 0xff,
1931                                 (pdev >> 11) & 0x1f, (pdev >> 8) & 0x7);
1932                 pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &base);
1933                 printf("OHCI regs address 0x%08x\n", base);
1934                 gohci.regs = (struct ohci_regs *)base;
1935         } else
1936                 return -1;
1937 #else
1938         gohci.regs = (struct ohci_regs *)CONFIG_SYS_USB_OHCI_REGS_BASE;
1939 #endif
1940
1941         gohci.flags = 0;
1942         gohci.slot_name = CONFIG_SYS_USB_OHCI_SLOT_NAME;
1943
1944         if (hc_reset (&gohci) < 0) {
1945                 hc_release_ohci (&gohci);
1946                 err ("can't reset usb-%s", gohci.slot_name);
1947 #ifdef CONFIG_SYS_USB_OHCI_BOARD_INIT
1948                 /* board dependant cleanup */
1949                 usb_board_init_fail();
1950 #endif
1951
1952 #ifdef CONFIG_SYS_USB_OHCI_CPU_INIT
1953                 /* cpu dependant cleanup */
1954                 usb_cpu_init_fail();
1955 #endif
1956                 return -1;
1957         }
1958
1959         if (hc_start(&gohci) < 0) {
1960                 err("can't start usb-%s", gohci.slot_name);
1961                 hc_release_ohci(&gohci);
1962                 /* Initialization failed */
1963 #ifdef CONFIG_SYS_USB_OHCI_BOARD_INIT
1964                 /* board dependant cleanup */
1965                 usb_board_stop();
1966 #endif
1967
1968 #ifdef CONFIG_SYS_USB_OHCI_CPU_INIT
1969                 /* cpu dependant cleanup */
1970                 usb_cpu_stop();
1971 #endif
1972                 return -1;
1973         }
1974
1975 #ifdef  DEBUG
1976         ohci_dump(&gohci, 1);
1977 #else
1978         wait_ms(1);
1979 #endif
1980         ohci_inited = 1;
1981         return 0;
1982 }
1983
1984 int usb_lowlevel_stop(void)
1985 {
1986         /* this gets called really early - before the controller has */
1987         /* even been initialized! */
1988         if (!ohci_inited)
1989                 return 0;
1990         /* TODO release any interrupts, etc. */
1991         /* call hc_release_ohci() here ? */
1992         hc_reset(&gohci);
1993
1994 #ifdef CONFIG_SYS_USB_OHCI_BOARD_INIT
1995         /* board dependant cleanup */
1996         if (usb_board_stop())
1997                 return -1;
1998 #endif
1999
2000 #ifdef CONFIG_SYS_USB_OHCI_CPU_INIT
2001         /* cpu dependant cleanup */
2002         if (usb_cpu_stop())
2003                 return -1;
2004 #endif
2005         /* This driver is no longer initialised. It needs a new low-level
2006          * init (board/cpu) before it can be used again. */
2007         ohci_inited = 0;
2008         return 0;
2009 }