drivers/usb/host/sl811-hcd.c

   1 /*
   2  * SL811HS HCD (Host Controller Driver) for USB.
   3  *
   4  * Copyright (C) 2004 Psion Teklogix (for NetBook PRO)
   5  * Copyright (C) 2004-2005 David Brownell
   6  *
   7  * Periodic scheduling is based on Roman's OHCI code
   8  *      Copyright (C) 1999 Roman Weissgaerber
   9  *
  10  * The SL811HS controller handles host side USB (like the SL11H, but with
  11  * another register set and SOF generation) as well as peripheral side USB
  12  * (like the SL811S).  This driver version doesn't implement the Gadget API
  13  * for the peripheral role; or OTG (that'd need much external circuitry).
  14  *
  15  * For documentation, see the SL811HS spec and the "SL811HS Embedded Host"
  16  * document (providing significant pieces missing from that spec); plus
  17  * the SL811S spec if you want peripheral side info.
  18  */
  19
  20 /*
  21  * Status:  Passed basic stress testing, works with hubs, mice, keyboards,
  22  * and usb-storage.
  23  *
  24  * TODO:
  25  * - usb suspend/resume triggered by sl811 (with USB_SUSPEND)
  26  * - various issues noted in the code
  27  * - performance work; use both register banks; ...
  28  * - use urb->iso_frame_desc[] with ISO transfers
  29  */
  30
  31 #undef  VERBOSE
  32 #undef  PACKET_TRACE
  33
  34 #include <linux/module.h>
  35 #include <linux/moduleparam.h>
  36 #include <linux/kernel.h>
  37 #include <linux/delay.h>
  38 #include <linux/ioport.h>
  39 #include <linux/sched.h>
  40 #include <linux/slab.h>
  41 #include <linux/errno.h>
  42 #include <linux/init.h>
  43 #include <linux/timer.h>
  44 #include <linux/list.h>
  45 #include <linux/interrupt.h>
  46 #include <linux/usb.h>
  47 #include <linux/usb/sl811.h>
  48 #include <linux/platform_device.h>
  49
  50 #include <asm/io.h>
  51 #include <asm/irq.h>
  52 #include <asm/system.h>
  53 #include <asm/byteorder.h>
  54
  55 #include "../core/hcd.h"
  56 #include "sl811.h"
  57
  58
  59 MODULE_DESCRIPTION("SL811HS USB Host Controller Driver");
  60 MODULE_LICENSE("GPL");
  61
  62 #define DRIVER_VERSION  "19 May 2005"
  63
  64
  65 #ifndef DEBUG
  66 #       define  STUB_DEBUG_FILE
  67 #endif
  68
  69 /* for now, use only one transfer register bank */
  70 #undef  USE_B
  71
  72 /* this doesn't understand urb->iso_frame_desc[], but if you had a driver
  73  * that just queued one ISO frame per URB then iso transfers "should" work
  74  * using the normal urb status fields.
  75  */
  76 #define DISABLE_ISO
  77
  78 // #define      QUIRK2
  79 #define QUIRK3
  80
  81 static const char hcd_name[] = "sl811-hcd";
  82
  83 /*-------------------------------------------------------------------------*/
  84
  85 static void port_power(struct sl811 *sl811, int is_on)
  86 {
  87         struct usb_hcd  *hcd = sl811_to_hcd(sl811);
  88
  89         /* hub is inactive unless the port is powered */
  90         if (is_on) {
  91                 if (sl811->port1 & (1 << USB_PORT_FEAT_POWER))
  92                         return;
  93
  94                 sl811->port1 = (1 << USB_PORT_FEAT_POWER);
  95                 sl811->irq_enable = SL11H_INTMASK_INSRMV;
  96                 hcd->self.controller->power.power_state = PMSG_ON;
  97         } else {
  98                 sl811->port1 = 0;
  99                 sl811->irq_enable = 0;
 100                 hcd->state = HC_STATE_HALT;
 101                 hcd->self.controller->power.power_state = PMSG_SUSPEND;
 102         }
 103         sl811->ctrl1 = 0;
 104         sl811_write(sl811, SL11H_IRQ_ENABLE, 0);
 105         sl811_write(sl811, SL11H_IRQ_STATUS, ~0);
 106
 107         if (sl811->board && sl811->board->port_power) {
 108                 /* switch VBUS, at 500mA unless hub power budget gets set */
 109                 DBG("power %s\n", is_on ? "on" : "off");
 110                 sl811->board->port_power(hcd->self.controller, is_on);
 111         }
 112
 113         /* reset as thoroughly as we can */
 114         if (sl811->board && sl811->board->reset)
 115                 sl811->board->reset(hcd->self.controller);
 116         else {
 117                 sl811_write(sl811, SL11H_CTLREG1, SL11H_CTL1MASK_SE0);
 118                 mdelay(20);
 119         }
 120
 121         sl811_write(sl811, SL11H_IRQ_ENABLE, 0);
 122         sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
 123         sl811_write(sl811, SL811HS_CTLREG2, SL811HS_CTL2_INIT);
 124         sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
 125
 126         // if !is_on, put into lowpower mode now
 127 }
 128
 129 /*-------------------------------------------------------------------------*/
 130
 131 /* This is a PIO-only HCD.  Queueing appends URBs to the endpoint's queue,
 132  * and may start I/O.  Endpoint queues are scanned during completion irq
 133  * handlers (one per packet: ACK, NAK, faults, etc) and urb cancellation.
 134  *
 135  * Using an external DMA engine to copy a packet at a time could work,
 136  * though setup/teardown costs may be too big to make it worthwhile.
 137  */
 138
 139 /* SETUP starts a new control request.  Devices are not allowed to
 140  * STALL or NAK these; they must cancel any pending control requests.
 141  */
 142 static void setup_packet(
 143         struct sl811            *sl811,
 144         struct sl811h_ep        *ep,
 145         struct urb              *urb,
 146         u8                      bank,
 147         u8                      control
 148 )
 149 {
 150         u8                      addr;
 151         u8                      len;
 152         void __iomem            *data_reg;
 153
 154         addr = SL811HS_PACKET_BUF(bank == 0);
 155         len = sizeof(struct usb_ctrlrequest);
 156         data_reg = sl811->data_reg;
 157         sl811_write_buf(sl811, addr, urb->setup_packet, len);
 158
 159         /* autoincrementing */
 160         sl811_write(sl811, bank + SL11H_BUFADDRREG, addr);
 161         writeb(len, data_reg);
 162         writeb(SL_SETUP /* | ep->epnum */, data_reg);
 163         writeb(usb_pipedevice(urb->pipe), data_reg);
 164
 165         /* always OUT/data0 */ ;
 166         sl811_write(sl811, bank + SL11H_HOSTCTLREG,
 167                         control | SL11H_HCTLMASK_OUT);
 168         ep->length = 0;
 169         PACKET("SETUP qh%p\n", ep);
 170 }
 171
 172 /* STATUS finishes control requests, often after IN or OUT data packets */
 173 static void status_packet(
 174         struct sl811            *sl811,
 175         struct sl811h_ep        *ep,
 176         struct urb              *urb,
 177         u8                      bank,
 178         u8                      control
 179 )
 180 {
 181         int                     do_out;
 182         void __iomem            *data_reg;
 183
 184         do_out = urb->transfer_buffer_length && usb_pipein(urb->pipe);
 185         data_reg = sl811->data_reg;
 186
 187         /* autoincrementing */
 188         sl811_write(sl811, bank + SL11H_BUFADDRREG, 0);
 189         writeb(0, data_reg);
 190         writeb((do_out ? SL_OUT : SL_IN) /* | ep->epnum */, data_reg);
 191         writeb(usb_pipedevice(urb->pipe), data_reg);
 192
 193         /* always data1; sometimes IN */
 194         control |= SL11H_HCTLMASK_TOGGLE;
 195         if (do_out)
 196                 control |= SL11H_HCTLMASK_OUT;
 197         sl811_write(sl811, bank + SL11H_HOSTCTLREG, control);
 198         ep->length = 0;
 199         PACKET("STATUS%s/%s qh%p\n", ep->nak_count ? "/retry" : "",
 200                         do_out ? "out" : "in", ep);
 201 }
 202
 203 /* IN packets can be used with any type of endpoint. here we just
 204  * start the transfer, data from the peripheral may arrive later.
 205  * urb->iso_frame_desc is currently ignored here...
 206  */
 207 static void in_packet(
 208         struct sl811            *sl811,
 209         struct sl811h_ep        *ep,
 210         struct urb              *urb,
 211         u8                      bank,
 212         u8                      control
 213 )
 214 {
 215         u8                      addr;
 216         u8                      len;
 217         void __iomem            *data_reg;
 218
 219         /* avoid losing data on overflow */
 220         len = ep->maxpacket;
 221         addr = SL811HS_PACKET_BUF(bank == 0);
 222         if (!(control & SL11H_HCTLMASK_ISOCH)
 223                         && usb_gettoggle(urb->dev, ep->epnum, 0))
 224                 control |= SL11H_HCTLMASK_TOGGLE;
 225         data_reg = sl811->data_reg;
 226
 227         /* autoincrementing */
 228         sl811_write(sl811, bank + SL11H_BUFADDRREG, addr);
 229         writeb(len, data_reg);
 230         writeb(SL_IN | ep->epnum, data_reg);
 231         writeb(usb_pipedevice(urb->pipe), data_reg);
 232
 233         sl811_write(sl811, bank + SL11H_HOSTCTLREG, control);
 234         ep->length = min((int)len,
 235                         urb->transfer_buffer_length - urb->actual_length);
 236         PACKET("IN%s/%d qh%p len%d\n", ep->nak_count ? "/retry" : "",
 237                         !!usb_gettoggle(urb->dev, ep->epnum, 0), ep, len);
 238 }
 239
 240 /* OUT packets can be used with any type of endpoint.
 241  * urb->iso_frame_desc is currently ignored here...
 242  */
 243 static void out_packet(
 244         struct sl811            *sl811,
 245         struct sl811h_ep        *ep,
 246         struct urb              *urb,
 247         u8                      bank,
 248         u8                      control
 249 )
 250 {
 251         void                    *buf;
 252         u8                      addr;
 253         u8                      len;
 254         void __iomem            *data_reg;
 255
 256         buf = urb->transfer_buffer + urb->actual_length;
 257         prefetch(buf);
 258
 259         len = min((int)ep->maxpacket,
 260                         urb->transfer_buffer_length - urb->actual_length);
 261
 262         if (!(control & SL11H_HCTLMASK_ISOCH)
 263                         && usb_gettoggle(urb->dev, ep->epnum, 1))
 264                 control |= SL11H_HCTLMASK_TOGGLE;
 265         addr = SL811HS_PACKET_BUF(bank == 0);
 266         data_reg = sl811->data_reg;
 267
 268         sl811_write_buf(sl811, addr, buf, len);
 269
 270         /* autoincrementing */
 271         sl811_write(sl811, bank + SL11H_BUFADDRREG, addr);
 272         writeb(len, data_reg);
 273         writeb(SL_OUT | ep->epnum, data_reg);
 274         writeb(usb_pipedevice(urb->pipe), data_reg);
 275
 276         sl811_write(sl811, bank + SL11H_HOSTCTLREG,
 277                         control | SL11H_HCTLMASK_OUT);
 278         ep->length = len;
 279         PACKET("OUT%s/%d qh%p len%d\n", ep->nak_count ? "/retry" : "",
 280                         !!usb_gettoggle(urb->dev, ep->epnum, 1), ep, len);
 281 }
 282
 283 /*-------------------------------------------------------------------------*/
 284
 285 /* caller updates on-chip enables later */
 286
 287 static inline void sofirq_on(struct sl811 *sl811)
 288 {
 289         if (sl811->irq_enable & SL11H_INTMASK_SOFINTR)
 290                 return;
 291         VDBG("sof irq on\n");
 292         sl811->irq_enable |= SL11H_INTMASK_SOFINTR;
 293 }
 294
 295 static inline void sofirq_off(struct sl811 *sl811)
 296 {
 297         if (!(sl811->irq_enable & SL11H_INTMASK_SOFINTR))
 298                 return;
 299         VDBG("sof irq off\n");
 300         sl811->irq_enable &= ~SL11H_INTMASK_SOFINTR;
 301 }
 302
 303 /*-------------------------------------------------------------------------*/
 304
 305 /* pick the next endpoint for a transaction, and issue it.
 306  * frames start with periodic transfers (after whatever is pending
 307  * from the previous frame), and the rest of the time is async
 308  * transfers, scheduled round-robin.
 309  */
 310 static struct sl811h_ep *start(struct sl811 *sl811, u8 bank)
 311 {
 312         struct sl811h_ep        *ep;
 313         struct urb              *urb;
 314         int                     fclock;
 315         u8                      control;
 316
 317         /* use endpoint at schedule head */
 318         if (sl811->next_periodic) {
 319                 ep = sl811->next_periodic;
 320                 sl811->next_periodic = ep->next;
 321         } else {
 322                 if (sl811->next_async)
 323                         ep = sl811->next_async;
 324                 else if (!list_empty(&sl811->async))
 325                         ep = container_of(sl811->async.next,
 326                                         struct sl811h_ep, schedule);
 327                 else {
 328                         /* could set up the first fullspeed periodic
 329                          * transfer for the next frame ...
 330                          */
 331                         return NULL;
 332                 }
 333
 334 #ifdef USE_B
 335                 if ((bank && sl811->active_b == ep) || sl811->active_a == ep)
 336                         return NULL;
 337 #endif
 338
 339                 if (ep->schedule.next == &sl811->async)
 340                         sl811->next_async = NULL;
 341                 else
 342                         sl811->next_async = container_of(ep->schedule.next,
 343                                         struct sl811h_ep, schedule);
 344         }
 345
 346         if (unlikely(list_empty(&ep->hep->urb_list))) {
 347                 DBG("empty %p queue?\n", ep);
 348                 return NULL;
 349         }
 350
 351         urb = container_of(ep->hep->urb_list.next, struct urb, urb_list);
 352         control = ep->defctrl;
 353
 354         /* if this frame doesn't have enough time left to transfer this
 355          * packet, wait till the next frame.  too-simple algorithm...
 356          */
 357         fclock = sl811_read(sl811, SL11H_SOFTMRREG) << 6;
 358         fclock -= 100;          /* setup takes not much time */
 359         if (urb->dev->speed == USB_SPEED_LOW) {
 360                 if (control & SL11H_HCTLMASK_PREAMBLE) {
 361                         /* also note erratum 1: some hubs won't work */
 362                         fclock -= 800;
 363                 }
 364                 fclock -= ep->maxpacket << 8;
 365
 366                 /* erratum 2: AFTERSOF only works for fullspeed */
 367                 if (fclock < 0) {
 368                         if (ep->period)
 369                                 sl811->stat_overrun++;
 370                         sofirq_on(sl811);
 371                         return NULL;
 372                 }
 373         } else {
 374                 fclock -= 12000 / 19;   /* 19 64byte packets/msec */
 375                 if (fclock < 0) {
 376                         if (ep->period)
 377                                 sl811->stat_overrun++;
 378                         control |= SL11H_HCTLMASK_AFTERSOF;
 379
 380                 /* throttle bulk/control irq noise */
 381                 } else if (ep->nak_count)
 382                         control |= SL11H_HCTLMASK_AFTERSOF;
 383         }
 384
 385
 386         switch (ep->nextpid) {
 387         case USB_PID_IN:
 388                 in_packet(sl811, ep, urb, bank, control);
 389                 break;
 390         case USB_PID_OUT:
 391                 out_packet(sl811, ep, urb, bank, control);
 392                 break;
 393         case USB_PID_SETUP:
 394                 setup_packet(sl811, ep, urb, bank, control);
 395                 break;
 396         case USB_PID_ACK:               /* for control status */
 397                 status_packet(sl811, ep, urb, bank, control);
 398                 break;
 399         default:
 400                 DBG("bad ep%p pid %02x\n", ep, ep->nextpid);
 401                 ep = NULL;
 402         }
 403         return ep;
 404 }
 405
 406 #define MIN_JIFFIES     ((msecs_to_jiffies(2) > 1) ? msecs_to_jiffies(2) : 2)
 407
 408 static inline void start_transfer(struct sl811 *sl811)
 409 {
 410         if (sl811->port1 & (1 << USB_PORT_FEAT_SUSPEND))
 411                 return;
 412         if (sl811->active_a == NULL) {
 413                 sl811->active_a = start(sl811, SL811_EP_A(SL811_HOST_BUF));
 414                 if (sl811->active_a != NULL)
 415                         sl811->jiffies_a = jiffies + MIN_JIFFIES;
 416         }
 417 #ifdef USE_B
 418         if (sl811->active_b == NULL) {
 419                 sl811->active_b = start(sl811, SL811_EP_B(SL811_HOST_BUF));
 420                 if (sl811->active_b != NULL)
 421                         sl811->jiffies_b = jiffies + MIN_JIFFIES;
 422         }
 423 #endif
 424 }
 425
 426 static void finish_request(
 427         struct sl811            *sl811,
 428         struct sl811h_ep        *ep,
 429         struct urb              *urb,
 430         int                     status
 431 ) __releases(sl811->lock) __acquires(sl811->lock)
 432 {
 433         unsigned                i;
 434
 435         if (usb_pipecontrol(urb->pipe))
 436                 ep->nextpid = USB_PID_SETUP;
 437
 438         spin_lock(&urb->lock);
 439         if (urb->status == -EINPROGRESS)
 440                 urb->status = status;
 441         urb->hcpriv = NULL;
 442         spin_unlock(&urb->lock);
 443
 444         usb_hcd_unlink_urb_from_ep(sl811_to_hcd(sl811), urb);
 445         spin_unlock(&sl811->lock);
 446         usb_hcd_giveback_urb(sl811_to_hcd(sl811), urb);
 447         spin_lock(&sl811->lock);
 448
 449         /* leave active endpoints in the schedule */
 450         if (!list_empty(&ep->hep->urb_list))
 451                 return;
 452
 453         /* async deschedule? */
 454         if (!list_empty(&ep->schedule)) {
 455                 list_del_init(&ep->schedule);
 456                 if (ep == sl811->next_async)
 457                         sl811->next_async = NULL;
 458                 return;
 459         }
 460
 461         /* periodic deschedule */
 462         DBG("deschedule qh%d/%p branch %d\n", ep->period, ep, ep->branch);
 463         for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
 464                 struct sl811h_ep        *temp;
 465                 struct sl811h_ep        **prev = &sl811->periodic[i];
 466
 467                 while (*prev && ((temp = *prev) != ep))
 468                         prev = &temp->next;
 469                 if (*prev)
 470                         *prev = ep->next;
 471                 sl811->load[i] -= ep->load;
 472         }
 473         ep->branch = PERIODIC_SIZE;
 474         sl811->periodic_count--;
 475         sl811_to_hcd(sl811)->self.bandwidth_allocated
 476                 -= ep->load / ep->period;
 477         if (ep == sl811->next_periodic)
 478                 sl811->next_periodic = ep->next;
 479
 480         /* we might turn SOFs back on again for the async schedule */
 481         if (sl811->periodic_count == 0)
 482                 sofirq_off(sl811);
 483 }
 484
 485 static void
 486 done(struct sl811 *sl811, struct sl811h_ep *ep, u8 bank)
 487 {
 488         u8                      status;
 489         struct urb              *urb;
 490         int                     urbstat = -EINPROGRESS;
 491
 492         if (unlikely(!ep))
 493                 return;
 494
 495         status = sl811_read(sl811, bank + SL11H_PKTSTATREG);
 496
 497         urb = container_of(ep->hep->urb_list.next, struct urb, urb_list);
 498
 499         /* we can safely ignore NAKs */
 500         if (status & SL11H_STATMASK_NAK) {
 501                 // PACKET("...NAK_%02x qh%p\n", bank, ep);
 502                 if (!ep->period)
 503                         ep->nak_count++;
 504                 ep->error_count = 0;
 505
 506         /* ACK advances transfer, toggle, and maybe queue */
 507         } else if (status & SL11H_STATMASK_ACK) {
 508                 struct usb_device       *udev = urb->dev;
 509                 int                     len;
 510                 unsigned char           *buf;
 511
 512                 /* urb->iso_frame_desc is currently ignored here... */
 513
 514                 ep->nak_count = ep->error_count = 0;
 515                 switch (ep->nextpid) {
 516                 case USB_PID_OUT:
 517                         // PACKET("...ACK/out_%02x qh%p\n", bank, ep);
 518                         urb->actual_length += ep->length;
 519                         usb_dotoggle(udev, ep->epnum, 1);
 520                         if (urb->actual_length
 521                                         == urb->transfer_buffer_length) {
 522                                 if (usb_pipecontrol(urb->pipe))
 523                                         ep->nextpid = USB_PID_ACK;
 524
 525                                 /* some bulk protocols terminate OUT transfers
 526                                  * by a short packet, using ZLPs not padding.
 527                                  */
 528                                 else if (ep->length < ep->maxpacket
 529                                                 || !(urb->transfer_flags
 530                                                         & URB_ZERO_PACKET))
 531                                         urbstat = 0;
 532                         }
 533                         break;
 534                 case USB_PID_IN:
 535                         // PACKET("...ACK/in_%02x qh%p\n", bank, ep);
 536                         buf = urb->transfer_buffer + urb->actual_length;
 537                         prefetchw(buf);
 538                         len = ep->maxpacket - sl811_read(sl811,
 539                                                 bank + SL11H_XFERCNTREG);
 540                         if (len > ep->length) {
 541                                 len = ep->length;
 542                                 urb->status = -EOVERFLOW;
 543                         }
 544                         urb->actual_length += len;
 545                         sl811_read_buf(sl811, SL811HS_PACKET_BUF(bank == 0),
 546                                         buf, len);
 547                         usb_dotoggle(udev, ep->epnum, 0);
 548                         if (urb->actual_length == urb->transfer_buffer_length)
 549                                 urbstat = 0;
 550                         else if (len < ep->maxpacket) {
 551                                 if (urb->transfer_flags & URB_SHORT_NOT_OK)
 552                                         urbstat = -EREMOTEIO;
 553                                 else
 554                                         urbstat = 0;
 555                         }
 556                         if (usb_pipecontrol(urb->pipe)
 557                                         && (urbstat == -EREMOTEIO
 558                                                 || urbstat == 0)) {
 559
 560                                 /* NOTE if the status stage STALLs (why?),
 561                                  * this reports the wrong urb status.
 562                                  */
 563                                 spin_lock(&urb->lock);
 564                                 if (urb->status == -EINPROGRESS)
 565                                         urb->status = urbstat;
 566                                 spin_unlock(&urb->lock);
 567
 568                                 urb = NULL;
 569                                 ep->nextpid = USB_PID_ACK;
 570                         }
 571                         break;
 572                 case USB_PID_SETUP:
 573                         // PACKET("...ACK/setup_%02x qh%p\n", bank, ep);
 574                         if (urb->transfer_buffer_length == urb->actual_length)
 575                                 ep->nextpid = USB_PID_ACK;
 576                         else if (usb_pipeout(urb->pipe)) {
 577                                 usb_settoggle(udev, 0, 1, 1);
 578                                 ep->nextpid = USB_PID_OUT;
 579                         } else {
 580                                 usb_settoggle(udev, 0, 0, 1);
 581                                 ep->nextpid = USB_PID_IN;
 582                         }
 583                         break;
 584                 case USB_PID_ACK:
 585                         // PACKET("...ACK/status_%02x qh%p\n", bank, ep);
 586                         urbstat = 0;
 587                         break;
 588                 }
 589
 590         /* STALL stops all transfers */
 591         } else if (status & SL11H_STATMASK_STALL) {
 592                 PACKET("...STALL_%02x qh%p\n", bank, ep);
 593                 ep->nak_count = ep->error_count = 0;
 594                 urbstat = -EPIPE;
 595
 596         /* error? retry, until "3 strikes" */
 597         } else if (++ep->error_count >= 3) {
 598                 if (status & SL11H_STATMASK_TMOUT)
 599                         urbstat = -ETIME;
 600                 else if (status & SL11H_STATMASK_OVF)
 601                         urbstat = -EOVERFLOW;
 602                 else
 603                         urbstat = -EPROTO;
 604                 ep->error_count = 0;
 605                 PACKET("...3STRIKES_%02x %02x qh%p stat %d\n",
 606                                 bank, status, ep, urbstat);
 607         }
 608
 609         if (urb && (urbstat != -EINPROGRESS || urb->status != -EINPROGRESS))
 610                 finish_request(sl811, ep, urb, urbstat);
 611 }
 612
 613 static inline u8 checkdone(struct sl811 *sl811)
 614 {
 615         u8      ctl;
 616         u8      irqstat = 0;
 617
 618         if (sl811->active_a && time_before_eq(sl811->jiffies_a, jiffies)) {
 619                 ctl = sl811_read(sl811, SL811_EP_A(SL11H_HOSTCTLREG));
 620                 if (ctl & SL11H_HCTLMASK_ARM)
 621                         sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0);
 622                 DBG("%s DONE_A: ctrl %02x sts %02x\n",
 623                         (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost",
 624                         ctl,
 625                         sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG)));
 626                 irqstat |= SL11H_INTMASK_DONE_A;
 627         }
 628 #ifdef  USE_B
 629         if (sl811->active_b && time_before_eq(sl811->jiffies_b, jiffies)) {
 630                 ctl = sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG));
 631                 if (ctl & SL11H_HCTLMASK_ARM)
 632                         sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0);
 633                 DBG("%s DONE_B: ctrl %02x sts %02x\n",
 634                         (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost",
 635                         ctl,
 636                         sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG)));
 637                 irqstat |= SL11H_INTMASK_DONE_A;
 638         }
 639 #endif
 640         return irqstat;
 641 }
 642
 643 static irqreturn_t sl811h_irq(struct usb_hcd *hcd)
 644 {
 645         struct sl811    *sl811 = hcd_to_sl811(hcd);
 646         u8              irqstat;
 647         irqreturn_t     ret = IRQ_NONE;
 648         unsigned        retries = 5;
 649
 650         spin_lock(&sl811->lock);
 651
 652 retry:
 653         irqstat = sl811_read(sl811, SL11H_IRQ_STATUS) & ~SL11H_INTMASK_DP;
 654         if (irqstat) {
 655                 sl811_write(sl811, SL11H_IRQ_STATUS, irqstat);
 656                 irqstat &= sl811->irq_enable;
 657         }
 658
 659 #ifdef  QUIRK2
 660         /* this may no longer be necessary ... */
 661         if (irqstat == 0) {
 662                 irqstat = checkdone(sl811);
 663                 if (irqstat)
 664                         sl811->stat_lost++;
 665         }
 666 #endif
 667
 668         /* USB packets, not necessarily handled in the order they're
 669          * issued ... that's fine if they're different endpoints.
 670          */
 671         if (irqstat & SL11H_INTMASK_DONE_A) {
 672                 done(sl811, sl811->active_a, SL811_EP_A(SL811_HOST_BUF));
 673                 sl811->active_a = NULL;
 674                 sl811->stat_a++;
 675         }
 676 #ifdef USE_B
 677         if (irqstat & SL11H_INTMASK_DONE_B) {
 678                 done(sl811, sl811->active_b, SL811_EP_B(SL811_HOST_BUF));
 679                 sl811->active_b = NULL;
 680                 sl811->stat_b++;
 681         }
 682 #endif
 683         if (irqstat & SL11H_INTMASK_SOFINTR) {
 684                 unsigned index;
 685
 686                 index = sl811->frame++ % (PERIODIC_SIZE - 1);
 687                 sl811->stat_sof++;
 688
 689                 /* be graceful about almost-inevitable periodic schedule
 690                  * overruns:  continue the previous frame's transfers iff
 691                  * this one has nothing scheduled.
 692                  */
 693                 if (sl811->next_periodic) {
 694                         // ERR("overrun to slot %d\n", index);
 695                         sl811->stat_overrun++;
 696                 }
 697                 if (sl811->periodic[index])
 698                         sl811->next_periodic = sl811->periodic[index];
 699         }
 700
 701         /* khubd manages debouncing and wakeup */
 702         if (irqstat & SL11H_INTMASK_INSRMV) {
 703                 sl811->stat_insrmv++;
 704
 705                 /* most stats are reset for each VBUS session */
 706                 sl811->stat_wake = 0;
 707                 sl811->stat_sof = 0;
 708                 sl811->stat_a = 0;
 709                 sl811->stat_b = 0;
 710                 sl811->stat_lost = 0;
 711
 712                 sl811->ctrl1 = 0;
 713                 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
 714
 715                 sl811->irq_enable = SL11H_INTMASK_INSRMV;
 716                 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
 717
 718                 /* usbcore nukes other pending transactions on disconnect */
 719                 if (sl811->active_a) {
 720                         sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0);
 721                         finish_request(sl811, sl811->active_a,
 722                                 container_of(sl811->active_a
 723                                                 ->hep->urb_list.next,
 724                                         struct urb, urb_list),
 725                                 -ESHUTDOWN);
 726                         sl811->active_a = NULL;
 727                 }
 728 #ifdef  USE_B
 729                 if (sl811->active_b) {
 730                         sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0);
 731                         finish_request(sl811, sl811->active_b,
 732                                 container_of(sl811->active_b
 733                                                 ->hep->urb_list.next,
 734                                         struct urb, urb_list),
 735                                 NULL, -ESHUTDOWN);
 736                         sl811->active_b = NULL;
 737                 }
 738 #endif
 739
 740                 /* port status seems weird until after reset, so
 741                  * force the reset and make khubd clean up later.
 742                  */
 743                 sl811->port1 |= (1 << USB_PORT_FEAT_C_CONNECTION)
 744                                 | (1 << USB_PORT_FEAT_CONNECTION);
 745
 746         } else if (irqstat & SL11H_INTMASK_RD) {
 747                 if (sl811->port1 & (1 << USB_PORT_FEAT_SUSPEND)) {
 748                         DBG("wakeup\n");
 749                         sl811->port1 |= 1 << USB_PORT_FEAT_C_SUSPEND;
 750                         sl811->stat_wake++;
 751                 } else
 752                         irqstat &= ~SL11H_INTMASK_RD;
 753         }
 754
 755         if (irqstat) {
 756                 if (sl811->port1 & (1 << USB_PORT_FEAT_ENABLE))
 757                         start_transfer(sl811);
 758                 ret = IRQ_HANDLED;
 759                 if (retries--)
 760                         goto retry;
 761         }
 762
 763         if (sl811->periodic_count == 0 && list_empty(&sl811->async))
 764                 sofirq_off(sl811);
 765         sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
 766
 767         spin_unlock(&sl811->lock);
 768
 769         return ret;
 770 }
 771
 772 /*-------------------------------------------------------------------------*/
 773
 774 /* usb 1.1 says max 90% of a frame is available for periodic transfers.
 775  * this driver doesn't promise that much since it's got to handle an
 776  * IRQ per packet; irq handling latencies also use up that time.
 777  *
 778  * NOTE:  the periodic schedule is a sparse tree, with the load for
 779  * each branch minimized.  see fig 3.5 in the OHCI spec for example.
 780  */
 781 #define MAX_PERIODIC_LOAD       500     /* out of 1000 usec */
 782
 783 static int balance(struct sl811 *sl811, u16 period, u16 load)
 784 {
 785         int     i, branch = -ENOSPC;
 786
 787         /* search for the least loaded schedule branch of that period
 788          * which has enough bandwidth left unreserved.
 789          */
 790         for (i = 0; i < period ; i++) {
 791                 if (branch < 0 || sl811->load[branch] > sl811->load[i]) {
 792                         int     j;
 793
 794                         for (j = i; j < PERIODIC_SIZE; j += period) {
 795                                 if ((sl811->load[j] + load)
 796                                                 > MAX_PERIODIC_LOAD)
 797                                         break;
 798                         }
 799                         if (j < PERIODIC_SIZE)
 800                                 continue;
 801                         branch = i;
 802                 }
 803         }
 804         return branch;
 805 }
 806
 807 /*-------------------------------------------------------------------------*/
 808
 809 static int sl811h_urb_enqueue(
 810         struct usb_hcd          *hcd,
 811         struct urb              *urb,
 812         gfp_t                   mem_flags
 813 ) {
 814         struct sl811            *sl811 = hcd_to_sl811(hcd);
 815         struct usb_device       *udev = urb->dev;
 816         unsigned int            pipe = urb->pipe;
 817         int                     is_out = !usb_pipein(pipe);
 818         int                     type = usb_pipetype(pipe);
 819         int                     epnum = usb_pipeendpoint(pipe);
 820         struct sl811h_ep        *ep = NULL;
 821         unsigned long           flags;
 822         int                     i;
 823         int                     retval;
 824         struct usb_host_endpoint        *hep = urb->ep;
 825
 826 #ifdef  DISABLE_ISO
 827         if (type == PIPE_ISOCHRONOUS)
 828                 return -ENOSPC;
 829 #endif
 830
 831         /* avoid all allocations within spinlocks */
 832         if (!hep->hcpriv)
 833                 ep = kzalloc(sizeof *ep, mem_flags);
 834
 835         spin_lock_irqsave(&sl811->lock, flags);
 836
 837         /* don't submit to a dead or disabled port */
 838         if (!(sl811->port1 & (1 << USB_PORT_FEAT_ENABLE))
 839                         || !HC_IS_RUNNING(hcd->state)) {
 840                 retval = -ENODEV;
 841                 kfree(ep);
 842                 goto fail_not_linked;
 843         }
 844         retval = usb_hcd_link_urb_to_ep(hcd, urb);
 845         if (retval) {
 846                 kfree(ep);
 847                 goto fail_not_linked;
 848         }
 849
 850         if (hep->hcpriv) {
 851                 kfree(ep);
 852                 ep = hep->hcpriv;
 853         } else if (!ep) {
 854                 retval = -ENOMEM;
 855                 goto fail;
 856
 857         } else {
 858                 INIT_LIST_HEAD(&ep->schedule);
 859                 ep->udev = udev;
 860                 ep->epnum = epnum;
 861                 ep->maxpacket = usb_maxpacket(udev, urb->pipe, is_out);
 862                 ep->defctrl = SL11H_HCTLMASK_ARM | SL11H_HCTLMASK_ENABLE;
 863                 usb_settoggle(udev, epnum, is_out, 0);
 864
 865                 if (type == PIPE_CONTROL)
 866                         ep->nextpid = USB_PID_SETUP;
 867                 else if (is_out)
 868                         ep->nextpid = USB_PID_OUT;
 869                 else
 870                         ep->nextpid = USB_PID_IN;
 871
 872                 if (ep->maxpacket > H_MAXPACKET) {
 873                         /* iso packets up to 240 bytes could work... */
 874                         DBG("dev %d ep%d maxpacket %d\n",
 875                                 udev->devnum, epnum, ep->maxpacket);
 876                         retval = -EINVAL;
 877                         goto fail;
 878                 }
 879
 880                 if (udev->speed == USB_SPEED_LOW) {
 881                         /* send preamble for external hub? */
 882                         if (!(sl811->ctrl1 & SL11H_CTL1MASK_LSPD))
 883                                 ep->defctrl |= SL11H_HCTLMASK_PREAMBLE;
 884                 }
 885                 switch (type) {
 886                 case PIPE_ISOCHRONOUS:
 887                 case PIPE_INTERRUPT:
 888                         if (urb->interval > PERIODIC_SIZE)
 889                                 urb->interval = PERIODIC_SIZE;
 890                         ep->period = urb->interval;
 891                         ep->branch = PERIODIC_SIZE;
 892                         if (type == PIPE_ISOCHRONOUS)
 893                                 ep->defctrl |= SL11H_HCTLMASK_ISOCH;
 894                         ep->load = usb_calc_bus_time(udev->speed, !is_out,
 895                                 (type == PIPE_ISOCHRONOUS),
 896                                 usb_maxpacket(udev, pipe, is_out))
 897                                         / 1000;
 898                         break;
 899                 }
 900
 901                 ep->hep = hep;
 902                 hep->hcpriv = ep;
 903         }
 904
 905         /* maybe put endpoint into schedule */
 906         switch (type) {
 907         case PIPE_CONTROL:
 908         case PIPE_BULK:
 909                 if (list_empty(&ep->schedule))
 910                         list_add_tail(&ep->schedule, &sl811->async);
 911                 break;
 912         case PIPE_ISOCHRONOUS:
 913         case PIPE_INTERRUPT:
 914                 urb->interval = ep->period;
 915                 if (ep->branch < PERIODIC_SIZE) {
 916                         /* NOTE:  the phase is correct here, but the value
 917                          * needs offsetting by the transfer queue depth.
 918                          * All current drivers ignore start_frame, so this
 919                          * is unlikely to ever matter...
 920                          */
 921                         urb->start_frame = (sl811->frame & (PERIODIC_SIZE - 1))
 922                                                 + ep->branch;
 923                         break;
 924                 }
 925
 926                 retval = balance(sl811, ep->period, ep->load);
 927                 if (retval < 0)
 928                         goto fail;
 929                 ep->branch = retval;
 930                 retval = 0;
 931                 urb->start_frame = (sl811->frame & (PERIODIC_SIZE - 1))
 932                                         + ep->branch;
 933
 934                 /* sort each schedule branch by period (slow before fast)
 935                  * to share the faster parts of the tree without needing
 936                  * dummy/placeholder nodes
 937                  */
 938                 DBG("schedule qh%d/%p branch %d\n", ep->period, ep, ep->branch);
 939                 for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
 940                         struct sl811h_ep        **prev = &sl811->periodic[i];
 941                         struct sl811h_ep        *here = *prev;
 942
 943                         while (here && ep != here) {
 944                                 if (ep->period > here->period)
 945                                         break;
 946                                 prev = &here->next;
 947                                 here = *prev;
 948                         }
 949                         if (ep != here) {
 950                                 ep->next = here;
 951                                 *prev = ep;
 952                         }
 953                         sl811->load[i] += ep->load;
 954                 }
 955                 sl811->periodic_count++;
 956                 hcd->self.bandwidth_allocated += ep->load / ep->period;
 957                 sofirq_on(sl811);
 958         }
 959
 960         /* in case of unlink-during-submit */
 961         spin_lock(&urb->lock);
 962         if (urb->status != -EINPROGRESS) {
 963                 spin_unlock(&urb->lock);
 964                 finish_request(sl811, ep, urb, 0);
 965                 retval = 0;
 966                 goto fail;
 967         }
 968         urb->hcpriv = hep;
 969         spin_unlock(&urb->lock);
 970
 971         start_transfer(sl811);
 972         sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
 973 fail:
 974         if (retval)
 975                 usb_hcd_unlink_urb_from_ep(hcd, urb);
 976 fail_not_linked:
 977         spin_unlock_irqrestore(&sl811->lock, flags);
 978         return retval;
 979 }
 980
 981 static int sl811h_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 982 {
 983         struct sl811            *sl811 = hcd_to_sl811(hcd);
 984         struct usb_host_endpoint *hep;
 985         unsigned long           flags;
 986         struct sl811h_ep        *ep;
 987         int                     retval;
 988
 989         spin_lock_irqsave(&sl811->lock, flags);
 990         retval = usb_hcd_check_unlink_urb(hcd, urb, status);
 991         if (retval)
 992                 goto fail;
 993
 994         hep = urb->hcpriv;
 995         ep = hep->hcpriv;
 996         if (ep) {
 997                 /* finish right away if this urb can't be active ...
 998                  * note that some drivers wrongly expect delays
 999                  */
1000                 if (ep->hep->urb_list.next != &urb->urb_list) {
1001                         /* not front of queue?  never active */
1002
1003                 /* for active transfers, we expect an IRQ */
1004                 } else if (sl811->active_a == ep) {
1005                         if (time_before_eq(sl811->jiffies_a, jiffies)) {
1006                                 /* happens a lot with lowspeed?? */
1007                                 DBG("giveup on DONE_A: ctrl %02x sts %02x\n",
1008                                         sl811_read(sl811,
1009                                                 SL811_EP_A(SL11H_HOSTCTLREG)),
1010                                         sl811_read(sl811,
1011                                                 SL811_EP_A(SL11H_PKTSTATREG)));
1012                                 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG),
1013                                                 0);
1014                                 sl811->active_a = NULL;
1015                         } else
1016                                 urb = NULL;
1017 #ifdef  USE_B
1018                 } else if (sl811->active_b == ep) {
1019                         if (time_before_eq(sl811->jiffies_a, jiffies)) {
1020                                 /* happens a lot with lowspeed?? */
1021                                 DBG("giveup on DONE_B: ctrl %02x sts %02x\n",
1022                                         sl811_read(sl811,
1023                                                 SL811_EP_B(SL11H_HOSTCTLREG)),
1024                                         sl811_read(sl811,
1025                                                 SL811_EP_B(SL11H_PKTSTATREG)));
1026                                 sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG),
1027                                                 0);
1028                                 sl811->active_b = NULL;
1029                         } else
1030                                 urb = NULL;
1031 #endif
1032                 } else {
1033                         /* front of queue for inactive endpoint */
1034                 }
1035
1036                 if (urb)
1037                         finish_request(sl811, ep, urb, 0);
1038                 else
1039                         VDBG("dequeue, urb %p active %s; wait4irq\n", urb,
1040                                 (sl811->active_a == ep) ? "A" : "B");
1041         } else
1042                 retval = -EINVAL;
1043  fail:
1044         spin_unlock_irqrestore(&sl811->lock, flags);
1045         return retval;
1046 }
1047
1048 static void
1049 sl811h_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *hep)
1050 {
1051         struct sl811h_ep        *ep = hep->hcpriv;
1052
1053         if (!ep)
1054                 return;
1055
1056         /* assume we'd just wait for the irq */
1057         if (!list_empty(&hep->urb_list))
1058                 msleep(3);
1059         if (!list_empty(&hep->urb_list))
1060                 WARN("ep %p not empty?\n", ep);
1061
1062         kfree(ep);
1063         hep->hcpriv = NULL;
1064 }
1065
1066 static int
1067 sl811h_get_frame(struct usb_hcd *hcd)
1068 {
1069         struct sl811 *sl811 = hcd_to_sl811(hcd);
1070
1071         /* wrong except while periodic transfers are scheduled;
1072          * never matches the on-the-wire frame;
1073          * subject to overruns.
1074          */
1075         return sl811->frame;
1076 }
1077
1078
1079 /*-------------------------------------------------------------------------*/
1080
1081 /* the virtual root hub timer IRQ checks for hub status */
1082 static int
1083 sl811h_hub_status_data(struct usb_hcd *hcd, char *buf)
1084 {
1085         struct sl811 *sl811 = hcd_to_sl811(hcd);
1086 #ifdef  QUIRK3
1087         unsigned long flags;
1088
1089         /* non-SMP HACK: use root hub timer as i/o watchdog
1090          * this seems essential when SOF IRQs aren't in use...
1091          */
1092         local_irq_save(flags);
1093         if (!timer_pending(&sl811->timer)) {
1094                 if (sl811h_irq( /* ~0, */ hcd) != IRQ_NONE)
1095                         sl811->stat_lost++;
1096         }
1097         local_irq_restore(flags);
1098 #endif
1099
1100         if (!(sl811->port1 & (0xffff << 16)))
1101                 return 0;
1102
1103         /* tell khubd port 1 changed */
1104         *buf = (1 << 1);
1105         return 1;
1106 }
1107
1108 static void
1109 sl811h_hub_descriptor (
1110         struct sl811                    *sl811,
1111         struct usb_hub_descriptor       *desc
1112 ) {
1113         u16             temp = 0;
1114
1115         desc->bDescriptorType = 0x29;
1116         desc->bHubContrCurrent = 0;
1117
1118         desc->bNbrPorts = 1;
1119         desc->bDescLength = 9;
1120
1121         /* per-port power switching (gang of one!), or none */
1122         desc->bPwrOn2PwrGood = 0;
1123         if (sl811->board && sl811->board->port_power) {
1124                 desc->bPwrOn2PwrGood = sl811->board->potpg;
1125                 if (!desc->bPwrOn2PwrGood)
1126                         desc->bPwrOn2PwrGood = 10;
1127                 temp = 0x0001;
1128         } else
1129                 temp = 0x0002;
1130
1131         /* no overcurrent errors detection/handling */
1132         temp |= 0x0010;
1133
1134         desc->wHubCharacteristics = (__force __u16)cpu_to_le16(temp);
1135
1136         /* two bitmaps:  ports removable, and legacy PortPwrCtrlMask */
1137         desc->bitmap[0] = 0 << 1;
1138         desc->bitmap[1] = ~0;
1139 }
1140
1141 static void
1142 sl811h_timer(unsigned long _sl811)
1143 {
1144         struct sl811    *sl811 = (void *) _sl811;
1145         unsigned long   flags;
1146         u8              irqstat;
1147         u8              signaling = sl811->ctrl1 & SL11H_CTL1MASK_FORCE;
1148         const u32       mask = (1 << USB_PORT_FEAT_CONNECTION)
1149                                 | (1 << USB_PORT_FEAT_ENABLE)
1150                                 | (1 << USB_PORT_FEAT_LOWSPEED);
1151
1152         spin_lock_irqsave(&sl811->lock, flags);
1153
1154         /* stop special signaling */
1155         sl811->ctrl1 &= ~SL11H_CTL1MASK_FORCE;
1156         sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1157         udelay(3);
1158
1159         irqstat = sl811_read(sl811, SL11H_IRQ_STATUS);
1160
1161         switch (signaling) {
1162         case SL11H_CTL1MASK_SE0:
1163                 DBG("end reset\n");
1164                 sl811->port1 = (1 << USB_PORT_FEAT_C_RESET)
1165                                 | (1 << USB_PORT_FEAT_POWER);
1166                 sl811->ctrl1 = 0;
1167                 /* don't wrongly ack RD */
1168                 if (irqstat & SL11H_INTMASK_INSRMV)
1169                         irqstat &= ~SL11H_INTMASK_RD;
1170                 break;
1171         case SL11H_CTL1MASK_K:
1172                 DBG("end resume\n");
1173                 sl811->port1 &= ~(1 << USB_PORT_FEAT_SUSPEND);
1174                 break;
1175         default:
1176                 DBG("odd timer signaling: %02x\n", signaling);
1177                 break;
1178         }
1179         sl811_write(sl811, SL11H_IRQ_STATUS, irqstat);
1180
1181         if (irqstat & SL11H_INTMASK_RD) {
1182                 /* usbcore nukes all pending transactions on disconnect */
1183                 if (sl811->port1 & (1 << USB_PORT_FEAT_CONNECTION))
1184                         sl811->port1 |= (1 << USB_PORT_FEAT_C_CONNECTION)
1185                                         | (1 << USB_PORT_FEAT_C_ENABLE);
1186                 sl811->port1 &= ~mask;
1187                 sl811->irq_enable = SL11H_INTMASK_INSRMV;
1188         } else {
1189                 sl811->port1 |= mask;
1190                 if (irqstat & SL11H_INTMASK_DP)
1191                         sl811->port1 &= ~(1 << USB_PORT_FEAT_LOWSPEED);
1192                 sl811->irq_enable = SL11H_INTMASK_INSRMV | SL11H_INTMASK_RD;
1193         }
1194
1195         if (sl811->port1 & (1 << USB_PORT_FEAT_CONNECTION)) {
1196                 u8      ctrl2 = SL811HS_CTL2_INIT;
1197
1198                 sl811->irq_enable |= SL11H_INTMASK_DONE_A;
1199 #ifdef USE_B
1200                 sl811->irq_enable |= SL11H_INTMASK_DONE_B;
1201 #endif
1202                 if (sl811->port1 & (1 << USB_PORT_FEAT_LOWSPEED)) {
1203                         sl811->ctrl1 |= SL11H_CTL1MASK_LSPD;
1204                         ctrl2 |= SL811HS_CTL2MASK_DSWAP;
1205                 }
1206
1207                 /* start SOFs flowing, kickstarting with A registers */
1208                 sl811->ctrl1 |= SL11H_CTL1MASK_SOF_ENA;
1209                 sl811_write(sl811, SL11H_SOFLOWREG, 0xe0);
1210                 sl811_write(sl811, SL811HS_CTLREG2, ctrl2);
1211
1212                 /* autoincrementing */
1213                 sl811_write(sl811, SL811_EP_A(SL11H_BUFLNTHREG), 0);
1214                 writeb(SL_SOF, sl811->data_reg);
1215                 writeb(0, sl811->data_reg);
1216                 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG),
1217                                 SL11H_HCTLMASK_ARM);
1218
1219                 /* khubd provides debounce delay */
1220         } else {
1221                 sl811->ctrl1 = 0;
1222         }
1223         sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1224
1225         /* reenable irqs */
1226         sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
1227         spin_unlock_irqrestore(&sl811->lock, flags);
1228 }
1229
1230 static int
1231 sl811h_hub_control(
1232         struct usb_hcd  *hcd,
1233         u16             typeReq,
1234         u16             wValue,
1235         u16             wIndex,
1236         char            *buf,
1237         u16             wLength
1238 ) {
1239         struct sl811    *sl811 = hcd_to_sl811(hcd);
1240         int             retval = 0;
1241         unsigned long   flags;
1242
1243         spin_lock_irqsave(&sl811->lock, flags);
1244
1245         switch (typeReq) {
1246         case ClearHubFeature:
1247         case SetHubFeature:
1248                 switch (wValue) {
1249                 case C_HUB_OVER_CURRENT:
1250                 case C_HUB_LOCAL_POWER:
1251                         break;
1252                 default:
1253                         goto error;
1254                 }
1255                 break;
1256         case ClearPortFeature:
1257                 if (wIndex != 1 || wLength != 0)
1258                         goto error;
1259
1260                 switch (wValue) {
1261                 case USB_PORT_FEAT_ENABLE:
1262                         sl811->port1 &= (1 << USB_PORT_FEAT_POWER);
1263                         sl811->ctrl1 = 0;
1264                         sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1265                         sl811->irq_enable = SL11H_INTMASK_INSRMV;
1266                         sl811_write(sl811, SL11H_IRQ_ENABLE,
1267                                                 sl811->irq_enable);
1268                         break;
1269                 case USB_PORT_FEAT_SUSPEND:
1270                         if (!(sl811->port1 & (1 << USB_PORT_FEAT_SUSPEND)))
1271                                 break;
1272
1273                         /* 20 msec of resume/K signaling, other irqs blocked */
1274                         DBG("start resume...\n");
1275                         sl811->irq_enable = 0;
1276                         sl811_write(sl811, SL11H_IRQ_ENABLE,
1277                                                 sl811->irq_enable);
1278                         sl811->ctrl1 |= SL11H_CTL1MASK_K;
1279                         sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1280
1281                         mod_timer(&sl811->timer, jiffies
1282                                         + msecs_to_jiffies(20));
1283                         break;
1284                 case USB_PORT_FEAT_POWER:
1285                         port_power(sl811, 0);
1286                         break;
1287                 case USB_PORT_FEAT_C_ENABLE:
1288                 case USB_PORT_FEAT_C_SUSPEND:
1289                 case USB_PORT_FEAT_C_CONNECTION:
1290                 case USB_PORT_FEAT_C_OVER_CURRENT:
1291                 case USB_PORT_FEAT_C_RESET:
1292                         break;
1293                 default:
1294                         goto error;
1295                 }
1296                 sl811->port1 &= ~(1 << wValue);
1297                 break;
1298         case GetHubDescriptor:
1299                 sl811h_hub_descriptor(sl811, (struct usb_hub_descriptor *) buf);
1300                 break;
1301         case GetHubStatus:
1302                 *(__le32 *) buf = cpu_to_le32(0);
1303                 break;
1304         case GetPortStatus:
1305                 if (wIndex != 1)
1306                         goto error;
1307                 *(__le32 *) buf = cpu_to_le32(sl811->port1);
1308
1309 #ifndef VERBOSE
1310         if (*(u16*)(buf+2))     /* only if wPortChange is interesting */
1311 #endif
1312                 DBG("GetPortStatus %08x\n", sl811->port1);
1313                 break;
1314         case SetPortFeature:
1315                 if (wIndex != 1 || wLength != 0)
1316                         goto error;
1317                 switch (wValue) {
1318                 case USB_PORT_FEAT_SUSPEND:
1319                         if (sl811->port1 & (1 << USB_PORT_FEAT_RESET))
1320                                 goto error;
1321                         if (!(sl811->port1 & (1 << USB_PORT_FEAT_ENABLE)))
1322                                 goto error;
1323
1324                         DBG("suspend...\n");
1325                         sl811->ctrl1 &= ~SL11H_CTL1MASK_SOF_ENA;
1326                         sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1327                         break;
1328                 case USB_PORT_FEAT_POWER:
1329                         port_power(sl811, 1);
1330                         break;
1331                 case USB_PORT_FEAT_RESET:
1332                         if (sl811->port1 & (1 << USB_PORT_FEAT_SUSPEND))
1333                                 goto error;
1334                         if (!(sl811->port1 & (1 << USB_PORT_FEAT_POWER)))
1335                                 break;
1336
1337                         /* 50 msec of reset/SE0 signaling, irqs blocked */
1338                         sl811->irq_enable = 0;
1339                         sl811_write(sl811, SL11H_IRQ_ENABLE,
1340                                                 sl811->irq_enable);
1341                         sl811->ctrl1 = SL11H_CTL1MASK_SE0;
1342                         sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1343                         sl811->port1 |= (1 << USB_PORT_FEAT_RESET);
1344                         mod_timer(&sl811->timer, jiffies
1345                                         + msecs_to_jiffies(50));
1346                         break;
1347                 default:
1348                         goto error;
1349                 }
1350                 sl811->port1 |= 1 << wValue;
1351                 break;
1352
1353         default:
1354 error:
1355                 /* "protocol stall" on error */
1356                 retval = -EPIPE;
1357         }
1358
1359         spin_unlock_irqrestore(&sl811->lock, flags);
1360         return retval;
1361 }
1362
1363 #ifdef  CONFIG_PM
1364
1365 static int
1366 sl811h_bus_suspend(struct usb_hcd *hcd)
1367 {
1368         // SOFs off
1369         DBG("%s\n", __FUNCTION__);
1370         return 0;
1371 }
1372
1373 static int
1374 sl811h_bus_resume(struct usb_hcd *hcd)
1375 {
1376         // SOFs on
1377         DBG("%s\n", __FUNCTION__);
1378         return 0;
1379 }
1380
1381 #else
1382
1383 #define sl811h_bus_suspend      NULL
1384 #define sl811h_bus_resume       NULL
1385
1386 #endif
1387
1388
1389 /*-------------------------------------------------------------------------*/
1390
1391 #ifdef STUB_DEBUG_FILE
1392
1393 static inline void create_debug_file(struct sl811 *sl811) { }
1394 static inline void remove_debug_file(struct sl811 *sl811) { }
1395
1396 #else
1397
1398 #include <linux/proc_fs.h>
1399 #include <linux/seq_file.h>
1400
1401 static void dump_irq(struct seq_file *s, char *label, u8 mask)
1402 {
1403         seq_printf(s, "%s %02x%s%s%s%s%s%s\n", label, mask,
1404                 (mask & SL11H_INTMASK_DONE_A) ? " done_a" : "",
1405                 (mask & SL11H_INTMASK_DONE_B) ? " done_b" : "",
1406                 (mask & SL11H_INTMASK_SOFINTR) ? " sof" : "",
1407                 (mask & SL11H_INTMASK_INSRMV) ? " ins/rmv" : "",
1408                 (mask & SL11H_INTMASK_RD) ? " rd" : "",
1409                 (mask & SL11H_INTMASK_DP) ? " dp" : "");
1410 }
1411
1412 static int proc_sl811h_show(struct seq_file *s, void *unused)
1413 {
1414         struct sl811            *sl811 = s->private;
1415         struct sl811h_ep        *ep;
1416         unsigned                i;
1417
1418         seq_printf(s, "%s\n%s version %s\nportstatus[1] = %08x\n",
1419                 sl811_to_hcd(sl811)->product_desc,
1420                 hcd_name, DRIVER_VERSION,
1421                 sl811->port1);
1422
1423         seq_printf(s, "insert/remove: %ld\n", sl811->stat_insrmv);
1424         seq_printf(s, "current session:  done_a %ld done_b %ld "
1425                         "wake %ld sof %ld overrun %ld lost %ld\n\n",
1426                 sl811->stat_a, sl811->stat_b,
1427                 sl811->stat_wake, sl811->stat_sof,
1428                 sl811->stat_overrun, sl811->stat_lost);
1429
1430         spin_lock_irq(&sl811->lock);
1431
1432         if (sl811->ctrl1 & SL11H_CTL1MASK_SUSPEND)
1433                 seq_printf(s, "(suspended)\n\n");
1434         else {
1435                 u8      t = sl811_read(sl811, SL11H_CTLREG1);
1436
1437                 seq_printf(s, "ctrl1 %02x%s%s%s%s\n", t,
1438                         (t & SL11H_CTL1MASK_SOF_ENA) ? " sofgen" : "",
1439                         ({char *s; switch (t & SL11H_CTL1MASK_FORCE) {
1440                         case SL11H_CTL1MASK_NORMAL: s = ""; break;
1441                         case SL11H_CTL1MASK_SE0: s = " se0/reset"; break;
1442                         case SL11H_CTL1MASK_K: s = " k/resume"; break;
1443                         default: s = "j"; break;
1444                         }; s; }),
1445                         (t & SL11H_CTL1MASK_LSPD) ? " lowspeed" : "",
1446                         (t & SL11H_CTL1MASK_SUSPEND) ? " suspend" : "");
1447
1448                 dump_irq(s, "irq_enable",
1449                                 sl811_read(sl811, SL11H_IRQ_ENABLE));
1450                 dump_irq(s, "irq_status",
1451                                 sl811_read(sl811, SL11H_IRQ_STATUS));
1452                 seq_printf(s, "frame clocks remaining:  %d\n",
1453                                 sl811_read(sl811, SL11H_SOFTMRREG) << 6);
1454         }
1455
1456         seq_printf(s, "A: qh%p ctl %02x sts %02x\n", sl811->active_a,
1457                 sl811_read(sl811, SL811_EP_A(SL11H_HOSTCTLREG)),
1458                 sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG)));
1459         seq_printf(s, "B: qh%p ctl %02x sts %02x\n", sl811->active_b,
1460                 sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG)),
1461                 sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG)));
1462         seq_printf(s, "\n");
1463         list_for_each_entry (ep, &sl811->async, schedule) {
1464                 struct urb              *urb;
1465
1466                 seq_printf(s, "%s%sqh%p, ep%d%s, maxpacket %d"
1467                                         " nak %d err %d\n",
1468                         (ep == sl811->active_a) ? "(A) " : "",
1469                         (ep == sl811->active_b) ? "(B) " : "",
1470                         ep, ep->epnum,
1471                         ({ char *s; switch (ep->nextpid) {
1472                         case USB_PID_IN: s = "in"; break;
1473                         case USB_PID_OUT: s = "out"; break;
1474                         case USB_PID_SETUP: s = "setup"; break;
1475                         case USB_PID_ACK: s = "status"; break;
1476                         default: s = "?"; break;
1477                         }; s;}),
1478                         ep->maxpacket,
1479                         ep->nak_count, ep->error_count);
1480                 list_for_each_entry (urb, &ep->hep->urb_list, urb_list) {
1481                         seq_printf(s, "  urb%p, %d/%d\n", urb,
1482                                 urb->actual_length,
1483                                 urb->transfer_buffer_length);
1484                 }
1485         }
1486         if (!list_empty(&sl811->async))
1487                 seq_printf(s, "\n");
1488
1489         seq_printf(s, "periodic size= %d\n", PERIODIC_SIZE);
1490
1491         for (i = 0; i < PERIODIC_SIZE; i++) {
1492                 ep = sl811->periodic[i];
1493                 if (!ep)
1494                         continue;
1495                 seq_printf(s, "%2d [%3d]:\n", i, sl811->load[i]);
1496
1497                 /* DUMB: prints shared entries multiple times */
1498                 do {
1499                         seq_printf(s,
1500                                 "   %s%sqh%d/%p (%sdev%d ep%d%s max %d) "
1501                                         "err %d\n",
1502                                 (ep == sl811->active_a) ? "(A) " : "",
1503                                 (ep == sl811->active_b) ? "(B) " : "",
1504                                 ep->period, ep,
1505                                 (ep->udev->speed == USB_SPEED_FULL)
1506                                         ? "" : "ls ",
1507                                 ep->udev->devnum, ep->epnum,
1508                                 (ep->epnum == 0) ? ""
1509                                         : ((ep->nextpid == USB_PID_IN)
1510                                                 ? "in"
1511                                                 : "out"),
1512                                 ep->maxpacket, ep->error_count);
1513                         ep = ep->next;
1514                 } while (ep);
1515         }
1516
1517         spin_unlock_irq(&sl811->lock);
1518         seq_printf(s, "\n");
1519
1520         return 0;
1521 }
1522
1523 static int proc_sl811h_open(struct inode *inode, struct file *file)
1524 {
1525         return single_open(file, proc_sl811h_show, PDE(inode)->data);
1526 }
1527
1528 static const struct file_operations proc_ops = {
1529         .open           = proc_sl811h_open,
1530         .read           = seq_read,
1531         .llseek         = seq_lseek,
1532         .release        = single_release,
1533 };
1534
1535 /* expect just one sl811 per system */
1536 static const char proc_filename[] = "driver/sl811h";
1537
1538 static void create_debug_file(struct sl811 *sl811)
1539 {
1540         struct proc_dir_entry *pde;
1541
1542         pde = create_proc_entry(proc_filename, 0, NULL);
1543         if (pde == NULL)
1544                 return;
1545
1546         pde->proc_fops = &proc_ops;
1547         pde->data = sl811;
1548         sl811->pde = pde;
1549 }
1550
1551 static void remove_debug_file(struct sl811 *sl811)
1552 {
1553         if (sl811->pde)
1554                 remove_proc_entry(proc_filename, NULL);
1555 }
1556
1557 #endif
1558
1559 /*-------------------------------------------------------------------------*/
1560
1561 static void
1562 sl811h_stop(struct usb_hcd *hcd)
1563 {
1564         struct sl811    *sl811 = hcd_to_sl811(hcd);
1565         unsigned long   flags;
1566
1567         del_timer_sync(&hcd->rh_timer);
1568
1569         spin_lock_irqsave(&sl811->lock, flags);
1570         port_power(sl811, 0);
1571         spin_unlock_irqrestore(&sl811->lock, flags);
1572 }
1573
1574 static int
1575 sl811h_start(struct usb_hcd *hcd)
1576 {
1577         struct sl811            *sl811 = hcd_to_sl811(hcd);
1578
1579         /* chip has been reset, VBUS power is off */
1580         hcd->state = HC_STATE_RUNNING;
1581
1582         if (sl811->board) {
1583                 if (!device_can_wakeup(hcd->self.controller))
1584                         device_init_wakeup(hcd->self.controller,
1585                                 sl811->board->can_wakeup);
1586                 hcd->power_budget = sl811->board->power * 2;
1587         }
1588
1589         /* enable power and interupts */
1590         port_power(sl811, 1);
1591
1592         return 0;
1593 }
1594
1595 /*-------------------------------------------------------------------------*/
1596
1597 static struct hc_driver sl811h_hc_driver = {
1598         .description =          hcd_name,
1599         .hcd_priv_size =        sizeof(struct sl811),
1600
1601         /*
1602          * generic hardware linkage
1603          */
1604         .irq =                  sl811h_irq,
1605         .flags =                HCD_USB11 | HCD_MEMORY,
1606
1607         /* Basic lifecycle operations */
1608         .start =                sl811h_start,
1609         .stop =                 sl811h_stop,
1610
1611         /*
1612          * managing i/o requests and associated device resources
1613          */
1614         .urb_enqueue =          sl811h_urb_enqueue,
1615         .urb_dequeue =          sl811h_urb_dequeue,
1616         .endpoint_disable =     sl811h_endpoint_disable,
1617
1618         /*
1619          * periodic schedule support
1620          */
1621         .get_frame_number =     sl811h_get_frame,
1622
1623         /*
1624          * root hub support
1625          */
1626         .hub_status_data =      sl811h_hub_status_data,
1627         .hub_control =          sl811h_hub_control,
1628         .bus_suspend =          sl811h_bus_suspend,
1629         .bus_resume =           sl811h_bus_resume,
1630 };
1631
1632 /*-------------------------------------------------------------------------*/
1633
1634 static int __devexit
1635 sl811h_remove(struct platform_device *dev)
1636 {
1637         struct usb_hcd          *hcd = platform_get_drvdata(dev);
1638         struct sl811            *sl811 = hcd_to_sl811(hcd);
1639         struct resource         *res;
1640
1641         remove_debug_file(sl811);
1642         usb_remove_hcd(hcd);
1643
1644         /* some platforms may use IORESOURCE_IO */
1645         res = platform_get_resource(dev, IORESOURCE_MEM, 1);
1646         if (res)
1647                 iounmap(sl811->data_reg);
1648
1649         res = platform_get_resource(dev, IORESOURCE_MEM, 0);
1650         if (res)
1651                 iounmap(sl811->addr_reg);
1652
1653         usb_put_hcd(hcd);
1654         return 0;
1655 }
1656
1657 static int __devinit
1658 sl811h_probe(struct platform_device *dev)
1659 {
1660         struct usb_hcd          *hcd;
1661         struct sl811            *sl811;
1662         struct resource         *addr, *data;
1663         int                     irq;
1664         void __iomem            *addr_reg;
1665         void __iomem            *data_reg;
1666         int                     retval;
1667         u8                      tmp, ioaddr = 0;
1668
1669         /* basic sanity checks first.  board-specific init logic should
1670          * have initialized these three resources and probably board
1671          * specific platform_data.  we don't probe for IRQs, and do only
1672          * minimal sanity checking.
1673          */
1674         irq = platform_get_irq(dev, 0);
1675         if (dev->num_resources < 3 || irq < 0)
1676                 return -ENODEV;
1677
1678         /* refuse to confuse usbcore */
1679         if (dev->dev.dma_mask) {
1680                 DBG("no we won't dma\n");
1681                 return -EINVAL;
1682         }
1683
1684         /* the chip may be wired for either kind of addressing */
1685         addr = platform_get_resource(dev, IORESOURCE_MEM, 0);
1686         data = platform_get_resource(dev, IORESOURCE_MEM, 1);
1687         retval = -EBUSY;
1688         if (!addr || !data) {
1689                 addr = platform_get_resource(dev, IORESOURCE_IO, 0);
1690                 data = platform_get_resource(dev, IORESOURCE_IO, 1);
1691                 if (!addr || !data)
1692                         return -ENODEV;
1693                 ioaddr = 1;
1694                 /*
1695                  * NOTE: 64-bit resource->start is getting truncated
1696                  * to avoid compiler warning, assuming that ->start
1697                  * is always 32-bit for this case
1698                  */
1699                 addr_reg = (void __iomem *) (unsigned long) addr->start;
1700                 data_reg = (void __iomem *) (unsigned long) data->start;
1701         } else {
1702                 addr_reg = ioremap(addr->start, 1);
1703                 if (addr_reg == NULL) {
1704                         retval = -ENOMEM;
1705                         goto err2;
1706                 }
1707
1708                 data_reg = ioremap(data->start, 1);
1709                 if (data_reg == NULL) {
1710                         retval = -ENOMEM;
1711                         goto err4;
1712                 }
1713         }
1714
1715         /* allocate and initialize hcd */
1716         hcd = usb_create_hcd(&sl811h_hc_driver, &dev->dev, dev->dev.bus_id);
1717         if (!hcd) {
1718                 retval = -ENOMEM;
1719                 goto err5;
1720         }
1721         hcd->rsrc_start = addr->start;
1722         sl811 = hcd_to_sl811(hcd);
1723
1724         spin_lock_init(&sl811->lock);
1725         INIT_LIST_HEAD(&sl811->async);
1726         sl811->board = dev->dev.platform_data;
1727         init_timer(&sl811->timer);
1728         sl811->timer.function = sl811h_timer;
1729         sl811->timer.data = (unsigned long) sl811;
1730         sl811->addr_reg = addr_reg;
1731         sl811->data_reg = data_reg;
1732
1733         spin_lock_irq(&sl811->lock);
1734         port_power(sl811, 0);
1735         spin_unlock_irq(&sl811->lock);
1736         msleep(200);
1737
1738         tmp = sl811_read(sl811, SL11H_HWREVREG);
1739         switch (tmp >> 4) {
1740         case 1:
1741                 hcd->product_desc = "SL811HS v1.2";
1742                 break;
1743         case 2:
1744                 hcd->product_desc = "SL811HS v1.5";
1745                 break;
1746         default:
1747                 /* reject case 0, SL11S is less functional */
1748                 DBG("chiprev %02x\n", tmp);
1749                 retval = -ENXIO;
1750                 goto err6;
1751         }
1752
1753         /* The chip's IRQ is level triggered, active high.  A requirement
1754          * for platform device setup is to cope with things like signal
1755          * inverters (e.g. CF is active low) or working only with edge
1756          * triggers (e.g. most ARM CPUs).  Initial driver stress testing
1757          * was on a system with single edge triggering, so most sorts of
1758          * triggering arrangement should work.
1759          */
1760         retval = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
1761         if (retval != 0)
1762                 goto err6;
1763
1764         create_debug_file(sl811);
1765         return retval;
1766
1767  err6:
1768         usb_put_hcd(hcd);
1769  err5:
1770         if (!ioaddr)
1771                 iounmap(data_reg);
1772  err4:
1773         if (!ioaddr)
1774                 iounmap(addr_reg);
1775  err2:
1776         DBG("init error, %d\n", retval);
1777         return retval;
1778 }
1779
1780 #ifdef  CONFIG_PM
1781
1782 /* for this device there's no useful distinction between the controller
1783  * and its root hub, except that the root hub only gets direct PM calls
1784  * when CONFIG_USB_SUSPEND is enabled.
1785  */
1786
1787 static int
1788 sl811h_suspend(struct platform_device *dev, pm_message_t state)
1789 {
1790         struct usb_hcd  *hcd = platform_get_drvdata(dev);
1791         struct sl811    *sl811 = hcd_to_sl811(hcd);
1792         int             retval = 0;
1793
1794         switch (state.event) {
1795         case PM_EVENT_FREEZE:
1796                 retval = sl811h_bus_suspend(hcd);
1797                 break;
1798         case PM_EVENT_SUSPEND:
1799         case PM_EVENT_PRETHAW:          /* explicitly discard hw state */
1800                 port_power(sl811, 0);
1801                 break;
1802         }
1803         if (retval == 0)
1804                 dev->dev.power.power_state = state;
1805         return retval;
1806 }
1807
1808 static int
1809 sl811h_resume(struct platform_device *dev)
1810 {
1811         struct usb_hcd  *hcd = platform_get_drvdata(dev);
1812         struct sl811    *sl811 = hcd_to_sl811(hcd);
1813
1814         /* with no "check to see if VBUS is still powered" board hook,
1815          * let's assume it'd only be powered to enable remote wakeup.
1816          */
1817         if (dev->dev.power.power_state.event == PM_EVENT_SUSPEND
1818                         || !device_can_wakeup(&hcd->self.root_hub->dev)) {
1819                 sl811->port1 = 0;
1820                 port_power(sl811, 1);
1821                 usb_root_hub_lost_power(hcd->self.root_hub);
1822                 return 0;
1823         }
1824
1825         dev->dev.power.power_state = PMSG_ON;
1826         return sl811h_bus_resume(hcd);
1827 }
1828
1829 #else
1830
1831 #define sl811h_suspend  NULL
1832 #define sl811h_resume   NULL
1833
1834 #endif
1835
1836
1837 /* this driver is exported so sl811_cs can depend on it */
1838 struct platform_driver sl811h_driver = {
1839         .probe =        sl811h_probe,
1840         .remove =       __devexit_p(sl811h_remove),
1841
1842         .suspend =      sl811h_suspend,
1843         .resume =       sl811h_resume,
1844         .driver = {
1845                 .name = (char *) hcd_name,
1846                 .owner = THIS_MODULE,
1847         },
1848 };
1849 EXPORT_SYMBOL(sl811h_driver);
1850
1851 /*-------------------------------------------------------------------------*/
1852
1853 static int __init sl811h_init(void)
1854 {
1855         if (usb_disabled())
1856                 return -ENODEV;
1857
1858         INFO("driver %s, %s\n", hcd_name, DRIVER_VERSION);
1859         return platform_driver_register(&sl811h_driver);
1860 }
1861 module_init(sl811h_init);
1862
1863 static void __exit sl811h_cleanup(void)
1864 {
1865         platform_driver_unregister(&sl811h_driver);
1866 }
1867 module_exit(sl811h_cleanup);