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 tdBE, tdCBP;
 969         urb_priv_t *lurb_priv = td->ed->purb;
 970
 971         tdBE   = m32_swap(td->hwBE);
 972         tdCBP  = m32_swap(td->hwCBP);
 973
 974         if (!(usb_pipecontrol(lurb_priv->pipe) &&
 975             ((td->index == 0) || (td->index == lurb_priv->length - 1)))) {
 976                 if (tdBE != 0) {
 977                         if (td->hwCBP == 0)
 978                                 lurb_priv->actual_length += tdBE - td->data + 1;
 979                         else
 980                                 lurb_priv->actual_length += tdCBP - td->data;
 981                 }
 982         }
 983 }
 984
 985 /*-------------------------------------------------------------------------*/
 986 static void check_status(td_t *td_list)
 987 {
 988         urb_priv_t *lurb_priv = td_list->ed->purb;
 989         int        urb_len    = lurb_priv->length;
 990         __u32      *phwHeadP  = &td_list->ed->hwHeadP;
 991         int        cc;
 992
 993         cc = TD_CC_GET(m32_swap(td_list->hwINFO));
 994         if (cc) {
 995                 err(" USB-error: %s (%x)", cc_to_string[cc], cc);
 996
 997                 if (*phwHeadP & m32_swap(0x1)) {
 998                         if (lurb_priv &&
 999                             ((td_list->index + 1) < urb_len)) {
1000                                 *phwHeadP =
1001                                         (lurb_priv->td[urb_len - 1]->hwNextTD &\
1002                                                         m32_swap(0xfffffff0)) |
1003                                                    (*phwHeadP & m32_swap(0x2));
1004
1005                                 lurb_priv->td_cnt += urb_len -
1006                                                      td_list->index - 1;
1007                         } else
1008                                 *phwHeadP &= m32_swap(0xfffffff2);
1009                 }
1010 #ifdef CONFIG_MPC5200
1011                 td_list->hwNextTD = 0;
1012 #endif
1013         }
1014 }
1015
1016 /* replies to the request have to be on a FIFO basis so
1017  * we reverse the reversed done-list */
1018 static td_t *dl_reverse_done_list(ohci_t *ohci)
1019 {
1020         __u32 td_list_hc;
1021         td_t *td_rev = NULL;
1022         td_t *td_list = NULL;
1023
1024         td_list_hc = m32_swap(ohci->hcca->done_head) & 0xfffffff0;
1025         ohci->hcca->done_head = 0;
1026
1027         while (td_list_hc) {
1028                 td_list = (td_t *)td_list_hc;
1029                 check_status(td_list);
1030                 td_list->next_dl_td = td_rev;
1031                 td_rev = td_list;
1032                 td_list_hc = m32_swap(td_list->hwNextTD) & 0xfffffff0;
1033         }
1034         return td_list;
1035 }
1036
1037 /*-------------------------------------------------------------------------*/
1038 /*-------------------------------------------------------------------------*/
1039
1040 static void finish_urb(ohci_t *ohci, urb_priv_t *urb, int status)
1041 {
1042         if ((status & (ED_OPER | ED_UNLINK)) && (urb->state != URB_DEL))
1043                 urb->finished = sohci_return_job(ohci, urb);
1044         else
1045                 dbg("finish_urb: strange.., ED state %x, \n", status);
1046 }
1047
1048 /*
1049  * Used to take back a TD from the host controller. This would normally be
1050  * called from within dl_done_list, however it may be called directly if the
1051  * HC no longer sees the TD and it has not appeared on the donelist (after
1052  * two frames).  This bug has been observed on ZF Micro systems.
1053  */
1054 static int takeback_td(ohci_t *ohci, td_t *td_list)
1055 {
1056         ed_t *ed;
1057         int cc;
1058         int stat = 0;
1059         /* urb_t *urb; */
1060         urb_priv_t *lurb_priv;
1061         __u32 tdINFO, edHeadP, edTailP;
1062
1063         tdINFO = m32_swap(td_list->hwINFO);
1064
1065         ed = td_list->ed;
1066         lurb_priv = ed->purb;
1067
1068         dl_transfer_length(td_list);
1069
1070         lurb_priv->td_cnt++;
1071
1072         /* error code of transfer */
1073         cc = TD_CC_GET(tdINFO);
1074         if (cc) {
1075                 err("USB-error: %s (%x)", cc_to_string[cc], cc);
1076                 stat = cc_to_error[cc];
1077         }
1078
1079         /* see if this done list makes for all TD's of current URB,
1080         * and mark the URB finished if so */
1081         if (lurb_priv->td_cnt == lurb_priv->length)
1082                 finish_urb(ohci, lurb_priv, ed->state);
1083
1084         dbg("dl_done_list: processing TD %x, len %x\n",
1085                 lurb_priv->td_cnt, lurb_priv->length);
1086
1087         if (ed->state != ED_NEW && (!usb_pipeint(lurb_priv->pipe))) {
1088                 edHeadP = m32_swap(ed->hwHeadP) & 0xfffffff0;
1089                 edTailP = m32_swap(ed->hwTailP);
1090
1091                 /* unlink eds if they are not busy */
1092                 if ((edHeadP == edTailP) && (ed->state == ED_OPER))
1093                         ep_unlink(ohci, ed);
1094         }
1095         return stat;
1096 }
1097
1098 static int dl_done_list(ohci_t *ohci)
1099 {
1100         int stat = 0;
1101         td_t    *td_list = dl_reverse_done_list(ohci);
1102
1103         while (td_list) {
1104                 td_t    *td_next = td_list->next_dl_td;
1105                 stat = takeback_td(ohci, td_list);
1106                 td_list = td_next;
1107         }
1108         return stat;
1109 }
1110
1111 /*-------------------------------------------------------------------------*
1112  * Virtual Root Hub
1113  *-------------------------------------------------------------------------*/
1114
1115 /* Device descriptor */
1116 static __u8 root_hub_dev_des[] =
1117 {
1118         0x12,       /*  __u8  bLength; */
1119         0x01,       /*  __u8  bDescriptorType; Device */
1120         0x10,       /*  __u16 bcdUSB; v1.1 */
1121         0x01,
1122         0x09,       /*  __u8  bDeviceClass; HUB_CLASSCODE */
1123         0x00,       /*  __u8  bDeviceSubClass; */
1124         0x00,       /*  __u8  bDeviceProtocol; */
1125         0x08,       /*  __u8  bMaxPacketSize0; 8 Bytes */
1126         0x00,       /*  __u16 idVendor; */
1127         0x00,
1128         0x00,       /*  __u16 idProduct; */
1129         0x00,
1130         0x00,       /*  __u16 bcdDevice; */
1131         0x00,
1132         0x00,       /*  __u8  iManufacturer; */
1133         0x01,       /*  __u8  iProduct; */
1134         0x00,       /*  __u8  iSerialNumber; */
1135         0x01        /*  __u8  bNumConfigurations; */
1136 };
1137
1138 /* Configuration descriptor */
1139 static __u8 root_hub_config_des[] =
1140 {
1141         0x09,       /*  __u8  bLength; */
1142         0x02,       /*  __u8  bDescriptorType; Configuration */
1143         0x19,       /*  __u16 wTotalLength; */
1144         0x00,
1145         0x01,       /*  __u8  bNumInterfaces; */
1146         0x01,       /*  __u8  bConfigurationValue; */
1147         0x00,       /*  __u8  iConfiguration; */
1148         0x40,       /*  __u8  bmAttributes;
1149          Bit 7: Bus-powered, 6: Self-powered, 5 Remote-wakwup, 4..0: resvd */
1150         0x00,       /*  __u8  MaxPower; */
1151
1152         /* interface */
1153         0x09,       /*  __u8  if_bLength; */
1154         0x04,       /*  __u8  if_bDescriptorType; Interface */
1155         0x00,       /*  __u8  if_bInterfaceNumber; */
1156         0x00,       /*  __u8  if_bAlternateSetting; */
1157         0x01,       /*  __u8  if_bNumEndpoints; */
1158         0x09,       /*  __u8  if_bInterfaceClass; HUB_CLASSCODE */
1159         0x00,       /*  __u8  if_bInterfaceSubClass; */
1160         0x00,       /*  __u8  if_bInterfaceProtocol; */
1161         0x00,       /*  __u8  if_iInterface; */
1162
1163         /* endpoint */
1164         0x07,       /*  __u8  ep_bLength; */
1165         0x05,       /*  __u8  ep_bDescriptorType; Endpoint */
1166         0x81,       /*  __u8  ep_bEndpointAddress; IN Endpoint 1 */
1167         0x03,       /*  __u8  ep_bmAttributes; Interrupt */
1168         0x02,       /*  __u16 ep_wMaxPacketSize; ((MAX_ROOT_PORTS + 1) / 8 */
1169         0x00,
1170         0xff        /*  __u8  ep_bInterval; 255 ms */
1171 };
1172
1173 static unsigned char root_hub_str_index0[] =
1174 {
1175         0x04,                   /*  __u8  bLength; */
1176         0x03,                   /*  __u8  bDescriptorType; String-descriptor */
1177         0x09,                   /*  __u8  lang ID */
1178         0x04,                   /*  __u8  lang ID */
1179 };
1180
1181 static unsigned char root_hub_str_index1[] =
1182 {
1183         28,                     /*  __u8  bLength; */
1184         0x03,                   /*  __u8  bDescriptorType; String-descriptor */
1185         'O',                    /*  __u8  Unicode */
1186         0,                              /*  __u8  Unicode */
1187         'H',                    /*  __u8  Unicode */
1188         0,                              /*  __u8  Unicode */
1189         'C',                    /*  __u8  Unicode */
1190         0,                              /*  __u8  Unicode */
1191         'I',                    /*  __u8  Unicode */
1192         0,                              /*  __u8  Unicode */
1193         ' ',                    /*  __u8  Unicode */
1194         0,                              /*  __u8  Unicode */
1195         'R',                    /*  __u8  Unicode */
1196         0,                              /*  __u8  Unicode */
1197         'o',                    /*  __u8  Unicode */
1198         0,                              /*  __u8  Unicode */
1199         'o',                    /*  __u8  Unicode */
1200         0,                              /*  __u8  Unicode */
1201         't',                    /*  __u8  Unicode */
1202         0,                              /*  __u8  Unicode */
1203         ' ',                    /*  __u8  Unicode */
1204         0,                              /*  __u8  Unicode */
1205         'H',                    /*  __u8  Unicode */
1206         0,                              /*  __u8  Unicode */
1207         'u',                    /*  __u8  Unicode */
1208         0,                              /*  __u8  Unicode */
1209         'b',                    /*  __u8  Unicode */
1210         0,                              /*  __u8  Unicode */
1211 };
1212
1213 /* Hub class-specific descriptor is constructed dynamically */
1214
1215 /*-------------------------------------------------------------------------*/
1216
1217 #define OK(x)                   len = (x); break
1218 #ifdef DEBUG
1219 #define WR_RH_STAT(x)           {info("WR:status %#8x", (x)); ohci_writel((x), \
1220                                                 &gohci.regs->roothub.status); }
1221 #define WR_RH_PORTSTAT(x)       {info("WR:portstatus[%d] %#8x", wIndex-1, \
1222         (x)); ohci_writel((x), &gohci.regs->roothub.portstatus[wIndex-1]); }
1223 #else
1224 #define WR_RH_STAT(x)           ohci_writel((x), &gohci.regs->roothub.status)
1225 #define WR_RH_PORTSTAT(x)       ohci_writel((x), \
1226                                     &gohci.regs->roothub.portstatus[wIndex-1])
1227 #endif
1228 #define RD_RH_STAT              roothub_status(&gohci)
1229 #define RD_RH_PORTSTAT          roothub_portstatus(&gohci, wIndex-1)
1230
1231 /* request to virtual root hub */
1232
1233 int rh_check_port_status(ohci_t *controller)
1234 {
1235         __u32 temp, ndp, i;
1236         int res;
1237
1238         res = -1;
1239         temp = roothub_a(controller);
1240         ndp = (temp & RH_A_NDP);
1241 #ifdef CONFIG_AT91C_PQFP_UHPBUG
1242         ndp = (ndp == 2) ? 1:0;
1243 #endif
1244         for (i = 0; i < ndp; i++) {
1245                 temp = roothub_portstatus(controller, i);
1246                 /* check for a device disconnect */
1247                 if (((temp & (RH_PS_PESC | RH_PS_CSC)) ==
1248                         (RH_PS_PESC | RH_PS_CSC)) &&
1249                         ((temp & RH_PS_CCS) == 0)) {
1250                         res = i;
1251                         break;
1252                 }
1253         }
1254         return res;
1255 }
1256
1257 static int ohci_submit_rh_msg(struct usb_device *dev, unsigned long pipe,
1258                 void *buffer, int transfer_len, struct devrequest *cmd)
1259 {
1260         void *data = buffer;
1261         int leni = transfer_len;
1262         int len = 0;
1263         int stat = 0;
1264         __u32 datab[4];
1265         union {
1266                 void *ptr;
1267                 __u8 *u8;
1268                 __u16 *u16;
1269                 __u32 *u32;
1270         } databuf;
1271         __u16 bmRType_bReq;
1272         __u16 wValue;
1273         __u16 wIndex;
1274         __u16 wLength;
1275
1276         databuf.u32 = (__u32 *)datab;
1277
1278 #ifdef DEBUG
1279 pkt_print(NULL, dev, pipe, buffer, transfer_len,
1280           cmd, "SUB(rh)", usb_pipein(pipe));
1281 #else
1282         mdelay(1);
1283 #endif
1284         if (usb_pipeint(pipe)) {
1285                 info("Root-Hub submit IRQ: NOT implemented");
1286                 return 0;
1287         }
1288
1289         bmRType_bReq  = cmd->requesttype | (cmd->request << 8);
1290         wValue        = le16_to_cpu(cmd->value);
1291         wIndex        = le16_to_cpu(cmd->index);
1292         wLength       = le16_to_cpu(cmd->length);
1293
1294         info("Root-Hub: adr: %2x cmd(%1x): %08x %04x %04x %04x",
1295                 dev->devnum, 8, bmRType_bReq, wValue, wIndex, wLength);
1296
1297         switch (bmRType_bReq) {
1298         /* Request Destination:
1299            without flags: Device,
1300            RH_INTERFACE: interface,
1301            RH_ENDPOINT: endpoint,
1302            RH_CLASS means HUB here,
1303            RH_OTHER | RH_CLASS  almost ever means HUB_PORT here
1304         */
1305
1306         case RH_GET_STATUS:
1307                 databuf.u16[0] = cpu_to_le16(1);
1308                 OK(2);
1309         case RH_GET_STATUS | RH_INTERFACE:
1310                 databuf.u16[0] = cpu_to_le16(0);
1311                 OK(2);
1312         case RH_GET_STATUS | RH_ENDPOINT:
1313                 databuf.u16[0] = cpu_to_le16(0);
1314                 OK(2);
1315         case RH_GET_STATUS | RH_CLASS:
1316                 databuf.u32[0] = cpu_to_le32(
1317                                 RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE));
1318                 OK(4);
1319         case RH_GET_STATUS | RH_OTHER | RH_CLASS:
1320                 databuf.u32[0] = cpu_to_le32(RD_RH_PORTSTAT);
1321                 OK(4);
1322
1323         case RH_CLEAR_FEATURE | RH_ENDPOINT:
1324                 switch (wValue) {
1325                 case (RH_ENDPOINT_STALL):
1326                         OK(0);
1327                 }
1328                 break;
1329
1330         case RH_CLEAR_FEATURE | RH_CLASS:
1331                 switch (wValue) {
1332                 case RH_C_HUB_LOCAL_POWER:
1333                         OK(0);
1334                 case (RH_C_HUB_OVER_CURRENT):
1335                         WR_RH_STAT(RH_HS_OCIC);
1336                         OK(0);
1337                 }
1338                 break;
1339
1340         case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
1341                 switch (wValue) {
1342                 case (RH_PORT_ENABLE):        WR_RH_PORTSTAT(RH_PS_CCS);  OK(0);
1343                 case (RH_PORT_SUSPEND):       WR_RH_PORTSTAT(RH_PS_POCI); OK(0);
1344                 case (RH_PORT_POWER):         WR_RH_PORTSTAT(RH_PS_LSDA); OK(0);
1345                 case (RH_C_PORT_CONNECTION):  WR_RH_PORTSTAT(RH_PS_CSC);  OK(0);
1346                 case (RH_C_PORT_ENABLE):      WR_RH_PORTSTAT(RH_PS_PESC); OK(0);
1347                 case (RH_C_PORT_SUSPEND):     WR_RH_PORTSTAT(RH_PS_PSSC); OK(0);
1348                 case (RH_C_PORT_OVER_CURRENT):WR_RH_PORTSTAT(RH_PS_OCIC); OK(0);
1349                 case (RH_C_PORT_RESET):       WR_RH_PORTSTAT(RH_PS_PRSC); OK(0);
1350                 }
1351                 break;
1352
1353         case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
1354                 switch (wValue) {
1355                 case (RH_PORT_SUSPEND):
1356                         WR_RH_PORTSTAT(RH_PS_PSS);  OK(0);
1357                 case (RH_PORT_RESET): /* BUG IN HUP CODE *********/
1358                         if (RD_RH_PORTSTAT & RH_PS_CCS)
1359                                 WR_RH_PORTSTAT(RH_PS_PRS);
1360                         OK(0);
1361                 case (RH_PORT_POWER):
1362                         WR_RH_PORTSTAT(RH_PS_PPS);
1363                         mdelay(100);
1364                         OK(0);
1365                 case (RH_PORT_ENABLE): /* BUG IN HUP CODE *********/
1366                         if (RD_RH_PORTSTAT & RH_PS_CCS)
1367                                 WR_RH_PORTSTAT(RH_PS_PES);
1368                         OK(0);
1369                 }
1370                 break;
1371
1372         case RH_SET_ADDRESS:
1373                 gohci.rh.devnum = wValue;
1374                 OK(0);
1375
1376         case RH_GET_DESCRIPTOR:
1377                 switch ((wValue & 0xff00) >> 8) {
1378                 case (0x01): /* device descriptor */
1379                         len = min_t(unsigned int,
1380                                         leni,
1381                                         min_t(unsigned int,
1382                                         sizeof(root_hub_dev_des),
1383                                         wLength));
1384                         databuf.ptr = root_hub_dev_des; OK(len);
1385                 case (0x02): /* configuration descriptor */
1386                         len = min_t(unsigned int,
1387                                         leni,
1388                                         min_t(unsigned int,
1389                                         sizeof(root_hub_config_des),
1390                                         wLength));
1391                         databuf.ptr = root_hub_config_des; OK(len);
1392                 case (0x03): /* string descriptors */
1393                         if (wValue == 0x0300) {
1394                                 len = min_t(unsigned int,
1395                                                 leni,
1396                                                 min_t(unsigned int,
1397                                                 sizeof(root_hub_str_index0),
1398                                                 wLength));
1399                                 databuf.ptr = root_hub_str_index0;
1400                                 OK(len);
1401                         }
1402                         if (wValue == 0x0301) {
1403                                 len = min_t(unsigned int,
1404                                                 leni,
1405                                                 min_t(unsigned int,
1406                                                 sizeof(root_hub_str_index1),
1407                                                 wLength));
1408                                 databuf.ptr = root_hub_str_index1;
1409                                 OK(len);
1410                 }
1411                 default:
1412                         stat = USB_ST_STALLED;
1413                 }
1414                 break;
1415
1416         case RH_GET_DESCRIPTOR | RH_CLASS:
1417         {
1418                 __u32 temp = roothub_a(&gohci);
1419
1420                 databuf.u8[0] = 9;              /* min length; */
1421                 databuf.u8[1] = 0x29;
1422                 databuf.u8[2] = temp & RH_A_NDP;
1423 #ifdef CONFIG_AT91C_PQFP_UHPBUG
1424                 databuf.u8[2] = (databuf.u8[2] == 2) ? 1 : 0;
1425 #endif
1426                 databuf.u8[3] = 0;
1427                 if (temp & RH_A_PSM)    /* per-port power switching? */
1428                         databuf.u8[3] |= 0x1;
1429                 if (temp & RH_A_NOCP)   /* no overcurrent reporting? */
1430                         databuf.u8[3] |= 0x10;
1431                 else if (temp & RH_A_OCPM)/* per-port overcurrent reporting? */
1432                         databuf.u8[3] |= 0x8;
1433
1434                 /* corresponds to databuf.u8[4-7] */
1435                 databuf.u8[1] = 0;
1436                 databuf.u8[5] = (temp & RH_A_POTPGT) >> 24;
1437                 temp = roothub_b(&gohci);
1438                 databuf.u8[7] = temp & RH_B_DR;
1439                 if (databuf.u8[2] < 7) {
1440                         databuf.u8[8] = 0xff;
1441                 } else {
1442                         databuf.u8[0] += 2;
1443                         databuf.u8[8] = (temp & RH_B_DR) >> 8;
1444                         databuf.u8[10] = databuf.u8[9] = 0xff;
1445                 }
1446
1447                 len = min_t(unsigned int, leni,
1448                             min_t(unsigned int, databuf.u8[0], wLength));
1449                 OK(len);
1450         }
1451
1452         case RH_GET_CONFIGURATION:
1453                 databuf.u8[0] = 0x01;
1454                 OK(1);
1455
1456         case RH_SET_CONFIGURATION:
1457                 WR_RH_STAT(0x10000);
1458                 OK(0);
1459
1460         default:
1461                 dbg("unsupported root hub command");
1462                 stat = USB_ST_STALLED;
1463         }
1464
1465 #ifdef  DEBUG
1466         ohci_dump_roothub(&gohci, 1);
1467 #else
1468         mdelay(1);
1469 #endif
1470
1471         len = min_t(int, len, leni);
1472         if (data != databuf.ptr)
1473                 memcpy(data, databuf.ptr, len);
1474         dev->act_len = len;
1475         dev->status = stat;
1476
1477 #ifdef DEBUG
1478         pkt_print(NULL, dev, pipe, buffer,
1479                   transfer_len, cmd, "RET(rh)", 0/*usb_pipein(pipe)*/);
1480 #else
1481         mdelay(1);
1482 #endif
1483
1484         return stat;
1485 }
1486
1487 /*-------------------------------------------------------------------------*/
1488
1489 /* common code for handling submit messages - used for all but root hub */
1490 /* accesses. */
1491 int submit_common_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1492                 int transfer_len, struct devrequest *setup, int interval)
1493 {
1494         int stat = 0;
1495         int maxsize = usb_maxpacket(dev, pipe);
1496         int timeout;
1497         urb_priv_t *urb;
1498
1499         urb = malloc(sizeof(urb_priv_t));
1500         memset(urb, 0, sizeof(urb_priv_t));
1501
1502         urb->dev = dev;
1503         urb->pipe = pipe;
1504         urb->transfer_buffer = buffer;
1505         urb->transfer_buffer_length = transfer_len;
1506         urb->interval = interval;
1507
1508         /* device pulled? Shortcut the action. */
1509         if (devgone == dev) {
1510                 dev->status = USB_ST_CRC_ERR;
1511                 return 0;
1512         }
1513
1514 #ifdef DEBUG
1515         urb->actual_length = 0;
1516         pkt_print(urb, dev, pipe, buffer, transfer_len,
1517                   setup, "SUB", usb_pipein(pipe));
1518 #else
1519         mdelay(1);
1520 #endif
1521         if (!maxsize) {
1522                 err("submit_common_message: pipesize for pipe %lx is zero",
1523                         pipe);
1524                 return -1;
1525         }
1526
1527         if (sohci_submit_job(urb, setup) < 0) {
1528                 err("sohci_submit_job failed");
1529                 return -1;
1530         }
1531
1532 #if 0
1533         mdelay(10);
1534         /* ohci_dump_status(&gohci); */
1535 #endif
1536
1537         timeout = USB_TIMEOUT_MS(pipe);
1538
1539         /* wait for it to complete */
1540         for (;;) {
1541                 /* check whether the controller is done */
1542                 stat = hc_interrupt();
1543                 if (stat < 0) {
1544                         stat = USB_ST_CRC_ERR;
1545                         break;
1546                 }
1547
1548                 /* NOTE: since we are not interrupt driven in U-Boot and always
1549                  * handle only one URB at a time, we cannot assume the
1550                  * transaction finished on the first successful return from
1551                  * hc_interrupt().. unless the flag for current URB is set,
1552                  * meaning that all TD's to/from device got actually
1553                  * transferred and processed. If the current URB is not
1554                  * finished we need to re-iterate this loop so as
1555                  * hc_interrupt() gets called again as there needs to be some
1556                  * more TD's to process still */
1557                 if ((stat >= 0) && (stat != 0xff) && (urb->finished)) {
1558                         /* 0xff is returned for an SF-interrupt */
1559                         break;
1560                 }
1561
1562                 if (--timeout) {
1563                         mdelay(1);
1564                         if (!urb->finished)
1565                                 dbg("*");
1566
1567                 } else {
1568                         err("CTL:TIMEOUT ");
1569                         dbg("submit_common_msg: TO status %x\n", stat);
1570                         urb->finished = 1;
1571                         stat = USB_ST_CRC_ERR;
1572                         break;
1573                 }
1574         }
1575
1576         dev->status = stat;
1577         dev->act_len = transfer_len;
1578
1579 #ifdef DEBUG
1580         pkt_print(urb, dev, pipe, buffer, transfer_len,
1581                   setup, "RET(ctlr)", usb_pipein(pipe));
1582 #else
1583         mdelay(1);
1584 #endif
1585
1586         /* free TDs in urb_priv */
1587         if (!usb_pipeint(pipe))
1588                 urb_free_priv(urb);
1589         return 0;
1590 }
1591
1592 /* submit routines called from usb.c */
1593 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1594                 int transfer_len)
1595 {
1596         info("submit_bulk_msg");
1597         return submit_common_msg(dev, pipe, buffer, transfer_len, NULL, 0);
1598 }
1599
1600 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1601                 int transfer_len, struct devrequest *setup)
1602 {
1603         int maxsize = usb_maxpacket(dev, pipe);
1604
1605         info("submit_control_msg");
1606 #ifdef DEBUG
1607         pkt_print(NULL, dev, pipe, buffer, transfer_len,
1608                   setup, "SUB", usb_pipein(pipe));
1609 #else
1610         mdelay(1);
1611 #endif
1612         if (!maxsize) {
1613                 err("submit_control_message: pipesize for pipe %lx is zero",
1614                         pipe);
1615                 return -1;
1616         }
1617         if (((pipe >> 8) & 0x7f) == gohci.rh.devnum) {
1618                 gohci.rh.dev = dev;
1619                 /* root hub - redirect */
1620                 return ohci_submit_rh_msg(dev, pipe, buffer, transfer_len,
1621                         setup);
1622         }
1623
1624         return submit_common_msg(dev, pipe, buffer, transfer_len, setup, 0);
1625 }
1626
1627 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
1628                 int transfer_len, int interval)
1629 {
1630         info("submit_int_msg");
1631         return submit_common_msg(dev, pipe, buffer, transfer_len, NULL,
1632                         interval);
1633 }
1634
1635 /*-------------------------------------------------------------------------*
1636  * HC functions
1637  *-------------------------------------------------------------------------*/
1638
1639 /* reset the HC and BUS */
1640
1641 static int hc_reset(ohci_t *ohci)
1642 {
1643 #ifdef CONFIG_PCI_EHCI_DEVNO
1644         pci_dev_t pdev;
1645 #endif
1646         int timeout = 30;
1647         int smm_timeout = 50; /* 0,5 sec */
1648
1649         dbg("%s\n", __FUNCTION__);
1650
1651 #ifdef CONFIG_PCI_EHCI_DEVNO
1652         /*
1653          *  Some multi-function controllers (e.g. ISP1562) allow root hub
1654          * resetting via EHCI registers only.
1655          */
1656         pdev = pci_find_devices(ehci_pci_ids, CONFIG_PCI_EHCI_DEVNO);
1657         if (pdev != -1) {
1658                 u32 base;
1659                 int timeout = 1000;
1660
1661                 pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &base);
1662                 base += EHCI_USBCMD_OFF;
1663                 ohci_writel(ohci_readl(base) | EHCI_USBCMD_HCRESET, base);
1664
1665                 while (ohci_readl(base) & EHCI_USBCMD_HCRESET) {
1666                         if (timeout-- <= 0) {
1667                                 printf("USB RootHub reset timed out!");
1668                                 break;
1669                         }
1670                         udelay(1);
1671                 }
1672         } else
1673                 printf("No EHCI func at %d index!\n", CONFIG_PCI_EHCI_DEVNO);
1674 #endif
1675         if (ohci_readl(&ohci->regs->control) & OHCI_CTRL_IR) {
1676                 /* SMM owns the HC, request ownership */
1677                 ohci_writel(OHCI_OCR, &ohci->regs->cmdstatus);
1678                 info("USB HC TakeOver from SMM");
1679                 while (ohci_readl(&ohci->regs->control) & OHCI_CTRL_IR) {
1680                         mdelay(10);
1681                         if (--smm_timeout == 0) {
1682                                 err("USB HC TakeOver failed!");
1683                                 return -1;
1684                         }
1685                 }
1686         }
1687
1688         /* Disable HC interrupts */
1689         ohci_writel(OHCI_INTR_MIE, &ohci->regs->intrdisable);
1690
1691         dbg("USB HC reset_hc usb-%s: ctrl = 0x%X ;\n",
1692                 ohci->slot_name,
1693                 ohci_readl(&ohci->regs->control));
1694
1695         /* Reset USB (needed by some controllers) */
1696         ohci->hc_control = 0;
1697         ohci_writel(ohci->hc_control, &ohci->regs->control);
1698
1699         /* HC Reset requires max 10 us delay */
1700         ohci_writel(OHCI_HCR,  &ohci->regs->cmdstatus);
1701         while ((ohci_readl(&ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
1702                 if (--timeout == 0) {
1703                         err("USB HC reset timed out!");
1704                         return -1;
1705                 }
1706                 udelay(1);
1707         }
1708         return 0;
1709 }
1710
1711 /*-------------------------------------------------------------------------*/
1712
1713 /* Start an OHCI controller, set the BUS operational
1714  * enable interrupts
1715  * connect the virtual root hub */
1716
1717 static int hc_start(ohci_t *ohci)
1718 {
1719         __u32 mask;
1720         unsigned int fminterval;
1721
1722         ohci->disabled = 1;
1723
1724         /* Tell the controller where the control and bulk lists are
1725          * The lists are empty now. */
1726
1727         ohci_writel(0, &ohci->regs->ed_controlhead);
1728         ohci_writel(0, &ohci->regs->ed_bulkhead);
1729
1730         ohci_writel((__u32)ohci->hcca,
1731                     &ohci->regs->hcca); /* reset clears this */
1732
1733         fminterval = 0x2edf;
1734         ohci_writel((fminterval * 9) / 10, &ohci->regs->periodicstart);
1735         fminterval |= ((((fminterval - 210) * 6) / 7) << 16);
1736         ohci_writel(fminterval, &ohci->regs->fminterval);
1737         ohci_writel(0x628, &ohci->regs->lsthresh);
1738
1739         /* start controller operations */
1740         ohci->hc_control = OHCI_CONTROL_INIT | OHCI_USB_OPER;
1741         ohci->disabled = 0;
1742         ohci_writel(ohci->hc_control, &ohci->regs->control);
1743
1744         /* disable all interrupts */
1745         mask = (OHCI_INTR_SO | OHCI_INTR_WDH | OHCI_INTR_SF | OHCI_INTR_RD |
1746                         OHCI_INTR_UE | OHCI_INTR_FNO | OHCI_INTR_RHSC |
1747                         OHCI_INTR_OC | OHCI_INTR_MIE);
1748         ohci_writel(mask, &ohci->regs->intrdisable);
1749         /* clear all interrupts */
1750         mask &= ~OHCI_INTR_MIE;
1751         ohci_writel(mask, &ohci->regs->intrstatus);
1752         /* Choose the interrupts we care about now  - but w/o MIE */
1753         mask = OHCI_INTR_RHSC | OHCI_INTR_UE | OHCI_INTR_WDH | OHCI_INTR_SO;
1754         ohci_writel(mask, &ohci->regs->intrenable);
1755
1756 #ifdef  OHCI_USE_NPS
1757         /* required for AMD-756 and some Mac platforms */
1758         ohci_writel((roothub_a(ohci) | RH_A_NPS) & ~RH_A_PSM,
1759                 &ohci->regs->roothub.a);
1760         ohci_writel(RH_HS_LPSC, &ohci->regs->roothub.status);
1761 #endif  /* OHCI_USE_NPS */
1762
1763         /* POTPGT delay is bits 24-31, in 2 ms units. */
1764         mdelay((roothub_a(ohci) >> 23) & 0x1fe);
1765
1766         /* connect the virtual root hub */
1767         ohci->rh.devnum = 0;
1768
1769         return 0;
1770 }
1771
1772 /*-------------------------------------------------------------------------*/
1773
1774 /* an interrupt happens */
1775
1776 static int hc_interrupt(void)
1777 {
1778         ohci_t *ohci = &gohci;
1779         struct ohci_regs *regs = ohci->regs;
1780         int ints;
1781         int stat = -1;
1782
1783         if ((ohci->hcca->done_head != 0) &&
1784                                 !(m32_swap(ohci->hcca->done_head) & 0x01)) {
1785                 ints =  OHCI_INTR_WDH;
1786         } else {
1787                 ints = ohci_readl(&regs->intrstatus);
1788                 if (ints == ~(u32)0) {
1789                         ohci->disabled++;
1790                         err("%s device removed!", ohci->slot_name);
1791                         return -1;
1792                 } else {
1793                         ints &= ohci_readl(&regs->intrenable);
1794                         if (ints == 0) {
1795                                 dbg("hc_interrupt: returning..\n");
1796                                 return 0xff;
1797                         }
1798                 }
1799         }
1800
1801         /* dbg("Interrupt: %x frame: %x", ints,
1802                                         le16_to_cpu(ohci->hcca->frame_no)); */
1803
1804         if (ints & OHCI_INTR_RHSC)
1805                 stat = 0xff;
1806
1807         if (ints & OHCI_INTR_UE) {
1808                 ohci->disabled++;
1809                 err("OHCI Unrecoverable Error, controller usb-%s disabled",
1810                         ohci->slot_name);
1811                 /* e.g. due to PCI Master/Target Abort */
1812
1813 #ifdef  DEBUG
1814                 ohci_dump(ohci, 1);
1815 #else
1816                 mdelay(1);
1817 #endif
1818                 /* FIXME: be optimistic, hope that bug won't repeat often. */
1819                 /* Make some non-interrupt context restart the controller. */
1820                 /* Count and limit the retries though; either hardware or */
1821                 /* software errors can go forever... */
1822                 hc_reset(ohci);
1823                 return -1;
1824         }
1825
1826         if (ints & OHCI_INTR_WDH) {
1827                 mdelay(1);
1828                 ohci_writel(OHCI_INTR_WDH, &regs->intrdisable);
1829                 (void)ohci_readl(&regs->intrdisable); /* flush */
1830                 stat = dl_done_list(&gohci);
1831                 ohci_writel(OHCI_INTR_WDH, &regs->intrenable);
1832                 (void)ohci_readl(&regs->intrdisable); /* flush */
1833         }
1834
1835         if (ints & OHCI_INTR_SO) {
1836                 dbg("USB Schedule overrun\n");
1837                 ohci_writel(OHCI_INTR_SO, &regs->intrenable);
1838                 stat = -1;
1839         }
1840
1841         /* FIXME:  this assumes SOF (1/ms) interrupts don't get lost... */
1842         if (ints & OHCI_INTR_SF) {
1843                 unsigned int frame = m16_swap(ohci->hcca->frame_no) & 1;
1844                 mdelay(1);
1845                 ohci_writel(OHCI_INTR_SF, &regs->intrdisable);
1846                 if (ohci->ed_rm_list[frame] != NULL)
1847                         ohci_writel(OHCI_INTR_SF, &regs->intrenable);
1848                 stat = 0xff;
1849         }
1850
1851         ohci_writel(ints, &regs->intrstatus);
1852         return stat;
1853 }
1854
1855 /*-------------------------------------------------------------------------*/
1856
1857 /*-------------------------------------------------------------------------*/
1858
1859 /* De-allocate all resources.. */
1860
1861 static void hc_release_ohci(ohci_t *ohci)
1862 {
1863         dbg("USB HC release ohci usb-%s", ohci->slot_name);
1864
1865         if (!ohci->disabled)
1866                 hc_reset(ohci);
1867 }
1868
1869 /*-------------------------------------------------------------------------*/
1870
1871 /*
1872  * low level initalisation routine, called from usb.c
1873  */
1874 static char ohci_inited = 0;
1875
1876 int usb_lowlevel_init(void)
1877 {
1878 #ifdef CONFIG_PCI_OHCI
1879         pci_dev_t pdev;
1880 #endif
1881
1882 #ifdef CONFIG_SYS_USB_OHCI_CPU_INIT
1883         /* cpu dependant init */
1884         if (usb_cpu_init())
1885                 return -1;
1886 #endif
1887
1888 #ifdef CONFIG_SYS_USB_OHCI_BOARD_INIT
1889         /*  board dependant init */
1890         if (usb_board_init())
1891                 return -1;
1892 #endif
1893         memset(&gohci, 0, sizeof(ohci_t));
1894
1895         /* align the storage */
1896         if ((__u32)&ghcca[0] & 0xff) {
1897                 err("HCCA not aligned!!");
1898                 return -1;
1899         }
1900         phcca = &ghcca[0];
1901         info("aligned ghcca %p", phcca);
1902         memset(&ohci_dev, 0, sizeof(struct ohci_device));
1903         if ((__u32)&ohci_dev.ed[0] & 0x7) {
1904                 err("EDs not aligned!!");
1905                 return -1;
1906         }
1907         memset(gtd, 0, sizeof(td_t) * (NUM_TD + 1));
1908         if ((__u32)gtd & 0x7) {
1909                 err("TDs not aligned!!");
1910                 return -1;
1911         }
1912         ptd = gtd;
1913         gohci.hcca = phcca;
1914         memset(phcca, 0, sizeof(struct ohci_hcca));
1915
1916         gohci.disabled = 1;
1917         gohci.sleeping = 0;
1918         gohci.irq = -1;
1919 #ifdef CONFIG_PCI_OHCI
1920         pdev = pci_find_devices(ohci_pci_ids, CONFIG_PCI_OHCI_DEVNO);
1921
1922         if (pdev != -1) {
1923                 u16 vid, did;
1924                 u32 base;
1925                 pci_read_config_word(pdev, PCI_VENDOR_ID, &vid);
1926                 pci_read_config_word(pdev, PCI_DEVICE_ID, &did);
1927                 printf("OHCI pci controller (%04x, %04x) found @(%d:%d:%d)\n",
1928                                 vid, did, (pdev >> 16) & 0xff,
1929                                 (pdev >> 11) & 0x1f, (pdev >> 8) & 0x7);
1930                 pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &base);
1931                 printf("OHCI regs address 0x%08x\n", base);
1932                 gohci.regs = (struct ohci_regs *)base;
1933         } else
1934                 return -1;
1935 #else
1936         gohci.regs = (struct ohci_regs *)CONFIG_SYS_USB_OHCI_REGS_BASE;
1937 #endif
1938
1939         gohci.flags = 0;
1940         gohci.slot_name = CONFIG_SYS_USB_OHCI_SLOT_NAME;
1941
1942         if (hc_reset (&gohci) < 0) {
1943                 hc_release_ohci (&gohci);
1944                 err ("can't reset usb-%s", gohci.slot_name);
1945 #ifdef CONFIG_SYS_USB_OHCI_BOARD_INIT
1946                 /* board dependant cleanup */
1947                 usb_board_init_fail();
1948 #endif
1949
1950 #ifdef CONFIG_SYS_USB_OHCI_CPU_INIT
1951                 /* cpu dependant cleanup */
1952                 usb_cpu_init_fail();
1953 #endif
1954                 return -1;
1955         }
1956
1957         if (hc_start(&gohci) < 0) {
1958                 err("can't start usb-%s", gohci.slot_name);
1959                 hc_release_ohci(&gohci);
1960                 /* Initialization failed */
1961 #ifdef CONFIG_SYS_USB_OHCI_BOARD_INIT
1962                 /* board dependant cleanup */
1963                 usb_board_stop();
1964 #endif
1965
1966 #ifdef CONFIG_SYS_USB_OHCI_CPU_INIT
1967                 /* cpu dependant cleanup */
1968                 usb_cpu_stop();
1969 #endif
1970                 return -1;
1971         }
1972
1973 #ifdef  DEBUG
1974         ohci_dump(&gohci, 1);
1975 #else
1976         mdelay(1);
1977 #endif
1978         ohci_inited = 1;
1979         return 0;
1980 }
1981
1982 int usb_lowlevel_stop(void)
1983 {
1984         /* this gets called really early - before the controller has */
1985         /* even been initialized! */
1986         if (!ohci_inited)
1987                 return 0;
1988         /* TODO release any interrupts, etc. */
1989         /* call hc_release_ohci() here ? */
1990         hc_reset(&gohci);
1991
1992 #ifdef CONFIG_SYS_USB_OHCI_BOARD_INIT
1993         /* board dependant cleanup */
1994         if (usb_board_stop())
1995                 return -1;
1996 #endif
1997
1998 #ifdef CONFIG_SYS_USB_OHCI_CPU_INIT
1999         /* cpu dependant cleanup */
2000         if (usb_cpu_stop())
2001                 return -1;
2002 #endif
2003         /* This driver is no longer initialised. It needs a new low-level
2004          * init (board/cpu) before it can be used again. */
2005         ohci_inited = 0;
2006         return 0;
2007 }