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