git.oblomov.eu Git - linux-2.6/blob - 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/config.h>
  35
  36 #ifdef CONFIG_USB_DEBUG
  37 #       define DEBUG
  38 #else
  39 #       undef DEBUG
  40 #endif
  41
  42 #include <linux/module.h>
  43 #include <linux/moduleparam.h>
  44 #include <linux/kernel.h>
  45 #include <linux/delay.h>
  46 #include <linux/ioport.h>
  47 #include <linux/sched.h>
  48 #include <linux/slab.h>
  49 #include <linux/smp_lock.h>
  50 #include <linux/errno.h>
  51 #include <linux/init.h>
  52 #include <linux/timer.h>
  53 #include <linux/list.h>
  54 #include <linux/interrupt.h>
  55 #include <linux/usb.h>
  56 #include <linux/usb_sl811.h>
  57
  58 #include <asm/io.h>
  59 #include <asm/irq.h>
  60 #include <asm/system.h>
  61 #include <asm/byteorder.h>
  62
  63 #include "../core/hcd.h"
  64 #include "sl811.h"
  65
  66
  67 MODULE_DESCRIPTION("SL811HS USB Host Controller Driver");
  68 MODULE_LICENSE("GPL");
  69
  70 #define DRIVER_VERSION  "19 May 2005"
  71
  72
  73 #ifndef DEBUG
  74 #       define  STUB_DEBUG_FILE
  75 #endif
  76
  77 /* for now, use only one transfer register bank */
  78 #undef  USE_B
  79
  80 /* this doesn't understand urb->iso_frame_desc[], but if you had a driver
  81  * that just queued one ISO frame per URB then iso transfers "should" work
  82  * using the normal urb status fields.
  83  */
  84 #define DISABLE_ISO
  85
  86 // #define      QUIRK2
  87 #define QUIRK3
  88
  89 static const char hcd_name[] = "sl811-hcd";
  90
  91 /*-------------------------------------------------------------------------*/
  92
  93 static void port_power(struct sl811 *sl811, int is_on)
  94 {
  95         struct usb_hcd  *hcd = sl811_to_hcd(sl811);
  96
  97         /* hub is inactive unless the port is powered */
  98         if (is_on) {
  99                 if (sl811->port1 & (1 << USB_PORT_FEAT_POWER))
 100                         return;
 101
 102                 sl811->port1 = (1 << USB_PORT_FEAT_POWER);
 103                 sl811->irq_enable = SL11H_INTMASK_INSRMV;
 104                 hcd->self.controller->power.power_state = PMSG_ON;
 105         } else {
 106                 sl811->port1 = 0;
 107                 sl811->irq_enable = 0;
 108                 hcd->state = HC_STATE_HALT;
 109                 hcd->self.controller->power.power_state = PMSG_SUSPEND;
 110         }
 111         sl811->ctrl1 = 0;
 112         sl811_write(sl811, SL11H_IRQ_ENABLE, 0);
 113         sl811_write(sl811, SL11H_IRQ_STATUS, ~0);
 114
 115         if (sl811->board && sl811->board->port_power) {
 116                 /* switch VBUS, at 500mA unless hub power budget gets set */
 117                 DBG("power %s\n", is_on ? "on" : "off");
 118                 sl811->board->port_power(hcd->self.controller, is_on);
 119         }
 120
 121         /* reset as thoroughly as we can */
 122         if (sl811->board && sl811->board->reset)
 123                 sl811->board->reset(hcd->self.controller);
 124         else {
 125                 sl811_write(sl811, SL11H_CTLREG1, SL11H_CTL1MASK_SE0);
 126                 mdelay(20);
 127         }
 128
 129         sl811_write(sl811, SL11H_IRQ_ENABLE, 0);
 130         sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
 131         sl811_write(sl811, SL811HS_CTLREG2, SL811HS_CTL2_INIT);
 132         sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
 133
 134         // if !is_on, put into lowpower mode now
 135 }
 136
 137 /*-------------------------------------------------------------------------*/
 138
 139 /* This is a PIO-only HCD.  Queueing appends URBs to the endpoint's queue,
 140  * and may start I/O.  Endpoint queues are scanned during completion irq
 141  * handlers (one per packet: ACK, NAK, faults, etc) and urb cancellation.
 142  *
 143  * Using an external DMA engine to copy a packet at a time could work,
 144  * though setup/teardown costs may be too big to make it worthwhile.
 145  */
 146
 147 /* SETUP starts a new control request.  Devices are not allowed to
 148  * STALL or NAK these; they must cancel any pending control requests.
 149  */
 150 static void setup_packet(
 151         struct sl811            *sl811,
 152         struct sl811h_ep        *ep,
 153         struct urb              *urb,
 154         u8                      bank,
 155         u8                      control
 156 )
 157 {
 158         u8                      addr;
 159         u8                      len;
 160         void __iomem            *data_reg;
 161
 162         addr = SL811HS_PACKET_BUF(bank == 0);
 163         len = sizeof(struct usb_ctrlrequest);
 164         data_reg = sl811->data_reg;
 165         sl811_write_buf(sl811, addr, urb->setup_packet, len);
 166
 167         /* autoincrementing */
 168         sl811_write(sl811, bank + SL11H_BUFADDRREG, addr);
 169         writeb(len, data_reg);
 170         writeb(SL_SETUP /* | ep->epnum */, data_reg);
 171         writeb(usb_pipedevice(urb->pipe), data_reg);
 172
 173         /* always OUT/data0 */ ;
 174         sl811_write(sl811, bank + SL11H_HOSTCTLREG,
 175                         control | SL11H_HCTLMASK_OUT);
 176         ep->length = 0;
 177         PACKET("SETUP qh%p\n", ep);
 178 }
 179
 180 /* STATUS finishes control requests, often after IN or OUT data packets */
 181 static void status_packet(
 182         struct sl811            *sl811,
 183         struct sl811h_ep        *ep,
 184         struct urb              *urb,
 185         u8                      bank,
 186         u8                      control
 187 )
 188 {
 189         int                     do_out;
 190         void __iomem            *data_reg;
 191
 192         do_out = urb->transfer_buffer_length && usb_pipein(urb->pipe);
 193         data_reg = sl811->data_reg;
 194
 195         /* autoincrementing */
 196         sl811_write(sl811, bank + SL11H_BUFADDRREG, 0);
 197         writeb(0, data_reg);
 198         writeb((do_out ? SL_OUT : SL_IN) /* | ep->epnum */, data_reg);
 199         writeb(usb_pipedevice(urb->pipe), data_reg);
 200
 201         /* always data1; sometimes IN */
 202         control |= SL11H_HCTLMASK_TOGGLE;
 203         if (do_out)
 204                 control |= SL11H_HCTLMASK_OUT;
 205         sl811_write(sl811, bank + SL11H_HOSTCTLREG, control);
 206         ep->length = 0;
 207         PACKET("STATUS%s/%s qh%p\n", ep->nak_count ? "/retry" : "",
 208                         do_out ? "out" : "in", ep);
 209 }
 210
 211 /* IN packets can be used with any type of endpoint. here we just
 212  * start the transfer, data from the peripheral may arrive later.
 213  * urb->iso_frame_desc is currently ignored here...
 214  */
 215 static void in_packet(
 216         struct sl811            *sl811,
 217         struct sl811h_ep        *ep,
 218         struct urb              *urb,
 219         u8                      bank,
 220         u8                      control
 221 )
 222 {
 223         u8                      addr;
 224         u8                      len;
 225         void __iomem            *data_reg;
 226
 227         /* avoid losing data on overflow */
 228         len = ep->maxpacket;
 229         addr = SL811HS_PACKET_BUF(bank == 0);
 230         if (!(control & SL11H_HCTLMASK_ISOCH)
 231                         && usb_gettoggle(urb->dev, ep->epnum, 0))
 232                 control |= SL11H_HCTLMASK_TOGGLE;
 233         data_reg = sl811->data_reg;
 234
 235         /* autoincrementing */
 236         sl811_write(sl811, bank + SL11H_BUFADDRREG, addr);
 237         writeb(len, data_reg);
 238         writeb(SL_IN | ep->epnum, data_reg);
 239         writeb(usb_pipedevice(urb->pipe), data_reg);
 240
 241         sl811_write(sl811, bank + SL11H_HOSTCTLREG, control);
 242         ep->length = min((int)len,
 243                         urb->transfer_buffer_length - urb->actual_length);
 244         PACKET("IN%s/%d qh%p len%d\n", ep->nak_count ? "/retry" : "",
 245                         !!usb_gettoggle(urb->dev, ep->epnum, 0), ep, len);
 246 }
 247
 248 /* OUT packets can be used with any type of endpoint.
 249  * urb->iso_frame_desc is currently ignored here...
 250  */
 251 static void out_packet(
 252         struct sl811            *sl811,
 253         struct sl811h_ep        *ep,
 254         struct urb              *urb,
 255         u8                      bank,
 256         u8                      control
 257 )
 258 {
 259         void                    *buf;
 260         u8                      addr;
 261         u8                      len;
 262         void __iomem            *data_reg;
 263
 264         buf = urb->transfer_buffer + urb->actual_length;
 265         prefetch(buf);
 266
 267         len = min((int)ep->maxpacket,
 268                         urb->transfer_buffer_length - urb->actual_length);
 269
 270         if (!(control & SL11H_HCTLMASK_ISOCH)
 271                         && usb_gettoggle(urb->dev, ep->epnum, 1))
 272                 control |= SL11H_HCTLMASK_TOGGLE;
 273         addr = SL811HS_PACKET_BUF(bank == 0);
 274         data_reg = sl811->data_reg;
 275
 276         sl811_write_buf(sl811, addr, buf, len);
 277
 278         /* autoincrementing */
 279         sl811_write(sl811, bank + SL11H_BUFADDRREG, addr);
 280         writeb(len, data_reg);
 281         writeb(SL_OUT | ep->epnum, data_reg);
 282         writeb(usb_pipedevice(urb->pipe), data_reg);
 283
 284         sl811_write(sl811, bank + SL11H_HOSTCTLREG,
 285                         control | SL11H_HCTLMASK_OUT);
 286         ep->length = len;
 287         PACKET("OUT%s/%d qh%p len%d\n", ep->nak_count ? "/retry" : "",
 288                         !!usb_gettoggle(urb->dev, ep->epnum, 1), ep, len);
 289 }
 290
 291 /*-------------------------------------------------------------------------*/
 292
 293 /* caller updates on-chip enables later */
 294
 295 static inline void sofirq_on(struct sl811 *sl811)
 296 {
 297         if (sl811->irq_enable & SL11H_INTMASK_SOFINTR)
 298                 return;
 299         VDBG("sof irq on\n");
 300         sl811->irq_enable |= SL11H_INTMASK_SOFINTR;
 301 }
 302
 303 static inline void sofirq_off(struct sl811 *sl811)
 304 {
 305         if (!(sl811->irq_enable & SL11H_INTMASK_SOFINTR))
 306                 return;
 307         VDBG("sof irq off\n");
 308         sl811->irq_enable &= ~SL11H_INTMASK_SOFINTR;
 309 }
 310
 311 /*-------------------------------------------------------------------------*/
 312
 313 /* pick the next endpoint for a transaction, and issue it.
 314  * frames start with periodic transfers (after whatever is pending
 315  * from the previous frame), and the rest of the time is async
 316  * transfers, scheduled round-robin.
 317  */
 318 static struct sl811h_ep *start(struct sl811 *sl811, u8 bank)
 319 {
 320         struct sl811h_ep        *ep;
 321         struct urb              *urb;
 322         int                     fclock;
 323         u8                      control;
 324
 325         /* use endpoint at schedule head */
 326         if (sl811->next_periodic) {
 327                 ep = sl811->next_periodic;
 328                 sl811->next_periodic = ep->next;
 329         } else {
 330                 if (sl811->next_async)
 331                         ep = sl811->next_async;
 332                 else if (!list_empty(&sl811->async))
 333                         ep = container_of(sl811->async.next,
 334                                         struct sl811h_ep, schedule);
 335                 else {
 336                         /* could set up the first fullspeed periodic
 337                          * transfer for the next frame ...
 338                          */
 339                         return NULL;
 340                 }
 341
 342 #ifdef USE_B
 343                 if ((bank && sl811->active_b == ep) || sl811->active_a == ep)
 344                         return NULL;
 345 #endif
 346
 347                 if (ep->schedule.next == &sl811->async)
 348                         sl811->next_async = NULL;
 349                 else
 350                         sl811->next_async = container_of(ep->schedule.next,
 351                                         struct sl811h_ep, schedule);
 352         }
 353
 354         if (unlikely(list_empty(&ep->hep->urb_list))) {
 355                 DBG("empty %p queue?\n", ep);
 356                 return NULL;
 357         }
 358
 359         urb = container_of(ep->hep->urb_list.next, struct urb, urb_list);
 360         control = ep->defctrl;
 361
 362         /* if this frame doesn't have enough time left to transfer this
 363          * packet, wait till the next frame.  too-simple algorithm...
 364          */
 365         fclock = sl811_read(sl811, SL11H_SOFTMRREG) << 6;
 366         fclock -= 100;          /* setup takes not much time */
 367         if (urb->dev->speed == USB_SPEED_LOW) {
 368                 if (control & SL11H_HCTLMASK_PREAMBLE) {
 369                         /* also note erratum 1: some hubs won't work */
 370                         fclock -= 800;
 371                 }
 372                 fclock -= ep->maxpacket << 8;
 373
 374                 /* erratum 2: AFTERSOF only works for fullspeed */
 375                 if (fclock < 0) {
 376                         if (ep->period)
 377                                 sl811->stat_overrun++;
 378                         sofirq_on(sl811);
 379                         return NULL;
 380                 }
 381         } else {
 382                 fclock -= 12000 / 19;   /* 19 64byte packets/msec */
 383                 if (fclock < 0) {
 384                         if (ep->period)
 385                                 sl811->stat_overrun++;
 386                         control |= SL11H_HCTLMASK_AFTERSOF;
 387
 388                 /* throttle bulk/control irq noise */
 389                 } else if (ep->nak_count)
 390                         control |= SL11H_HCTLMASK_AFTERSOF;
 391         }
 392
 393
 394         switch (ep->nextpid) {
 395         case USB_PID_IN:
 396                 in_packet(sl811, ep, urb, bank, control);
 397                 break;
 398         case USB_PID_OUT:
 399                 out_packet(sl811, ep, urb, bank, control);
 400                 break;
 401         case USB_PID_SETUP:
 402                 setup_packet(sl811, ep, urb, bank, control);
 403                 break;
 404         case USB_PID_ACK:               /* for control status */
 405                 status_packet(sl811, ep, urb, bank, control);
 406                 break;
 407         default:
 408                 DBG("bad ep%p pid %02x\n", ep, ep->nextpid);
 409                 ep = NULL;
 410         }
 411         return ep;
 412 }
 413
 414 #define MIN_JIFFIES     ((msecs_to_jiffies(2) > 1) ? msecs_to_jiffies(2) : 2)
 415
 416 static inline void start_transfer(struct sl811 *sl811)
 417 {
 418         if (sl811->port1 & (1 << USB_PORT_FEAT_SUSPEND))
 419                 return;
 420         if (sl811->active_a == NULL) {
 421                 sl811->active_a = start(sl811, SL811_EP_A(SL811_HOST_BUF));
 422                 if (sl811->active_a != NULL)
 423                         sl811->jiffies_a = jiffies + MIN_JIFFIES;
 424         }
 425 #ifdef USE_B
 426         if (sl811->active_b == NULL) {
 427                 sl811->active_b = start(sl811, SL811_EP_B(SL811_HOST_BUF));
 428                 if (sl811->active_b != NULL)
 429                         sl811->jiffies_b = jiffies + MIN_JIFFIES;
 430         }
 431 #endif
 432 }
 433
 434 static void finish_request(
 435         struct sl811            *sl811,
 436         struct sl811h_ep        *ep,
 437         struct urb              *urb,
 438         struct pt_regs          *regs,
 439         int                     status
 440 ) __releases(sl811->lock) __acquires(sl811->lock)
 441 {
 442         unsigned                i;
 443
 444         if (usb_pipecontrol(urb->pipe))
 445                 ep->nextpid = USB_PID_SETUP;
 446
 447         spin_lock(&urb->lock);
 448         if (urb->status == -EINPROGRESS)
 449                 urb->status = status;
 450         urb->hcpriv = NULL;
 451         spin_unlock(&urb->lock);
 452
 453         spin_unlock(&sl811->lock);
 454         usb_hcd_giveback_urb(sl811_to_hcd(sl811), urb, regs);
 455         spin_lock(&sl811->lock);
 456
 457         /* leave active endpoints in the schedule */
 458         if (!list_empty(&ep->hep->urb_list))
 459                 return;
 460
 461         /* async deschedule? */
 462         if (!list_empty(&ep->schedule)) {
 463                 list_del_init(&ep->schedule);
 464                 if (ep == sl811->next_async)
 465                         sl811->next_async = NULL;
 466                 return;
 467         }
 468
 469         /* periodic deschedule */
 470         DBG("deschedule qh%d/%p branch %d\n", ep->period, ep, ep->branch);
 471         for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
 472                 struct sl811h_ep        *temp;
 473                 struct sl811h_ep        **prev = &sl811->periodic[i];
 474
 475                 while (*prev && ((temp = *prev) != ep))
 476                         prev = &temp->next;
 477                 if (*prev)
 478                         *prev = ep->next;
 479                 sl811->load[i] -= ep->load;
 480         }
 481         ep->branch = PERIODIC_SIZE;
 482         sl811->periodic_count--;
 483         sl811_to_hcd(sl811)->self.bandwidth_allocated
 484                 -= ep->load / ep->period;
 485         if (ep == sl811->next_periodic)
 486                 sl811->next_periodic = ep->next;
 487
 488         /* we might turn SOFs back on again for the async schedule */
 489         if (sl811->periodic_count == 0)
 490                 sofirq_off(sl811);
 491 }
 492
 493 static void
 494 done(struct sl811 *sl811, struct sl811h_ep *ep, u8 bank, struct pt_regs *regs)
 495 {
 496         u8                      status;
 497         struct urb              *urb;
 498         int                     urbstat = -EINPROGRESS;
 499
 500         if (unlikely(!ep))
 501                 return;
 502
 503         status = sl811_read(sl811, bank + SL11H_PKTSTATREG);
 504
 505         urb = container_of(ep->hep->urb_list.next, struct urb, urb_list);
 506
 507         /* we can safely ignore NAKs */
 508         if (status & SL11H_STATMASK_NAK) {
 509                 // PACKET("...NAK_%02x qh%p\n", bank, ep);
 510                 if (!ep->period)
 511                         ep->nak_count++;
 512                 ep->error_count = 0;
 513
 514         /* ACK advances transfer, toggle, and maybe queue */
 515         } else if (status & SL11H_STATMASK_ACK) {
 516                 struct usb_device       *udev = urb->dev;
 517                 int                     len;
 518                 unsigned char           *buf;
 519
 520                 /* urb->iso_frame_desc is currently ignored here... */
 521
 522                 ep->nak_count = ep->error_count = 0;
 523                 switch (ep->nextpid) {
 524                 case USB_PID_OUT:
 525                         // PACKET("...ACK/out_%02x qh%p\n", bank, ep);
 526                         urb->actual_length += ep->length;
 527                         usb_dotoggle(udev, ep->epnum, 1);
 528                         if (urb->actual_length
 529                                         == urb->transfer_buffer_length) {
 530                                 if (usb_pipecontrol(urb->pipe))
 531                                         ep->nextpid = USB_PID_ACK;
 532
 533                                 /* some bulk protocols terminate OUT transfers
 534                                  * by a short packet, using ZLPs not padding.
 535                                  */
 536                                 else if (ep->length < ep->maxpacket
 537                                                 || !(urb->transfer_flags
 538                                                         & URB_ZERO_PACKET))
 539                                         urbstat = 0;
 540                         }
 541                         break;
 542                 case USB_PID_IN:
 543                         // PACKET("...ACK/in_%02x qh%p\n", bank, ep);
 544                         buf = urb->transfer_buffer + urb->actual_length;
 545                         prefetchw(buf);
 546                         len = ep->maxpacket - sl811_read(sl811,
 547                                                 bank + SL11H_XFERCNTREG);
 548                         if (len > ep->length) {
 549                                 len = ep->length;
 550                                 urb->status = -EOVERFLOW;
 551                         }
 552                         urb->actual_length += len;
 553                         sl811_read_buf(sl811, SL811HS_PACKET_BUF(bank == 0),
 554                                         buf, len);
 555                         usb_dotoggle(udev, ep->epnum, 0);
 556                         if (urb->actual_length == urb->transfer_buffer_length)
 557                                 urbstat = 0;
 558                         else if (len < ep->maxpacket) {
 559                                 if (urb->transfer_flags & URB_SHORT_NOT_OK)
 560                                         urbstat = -EREMOTEIO;
 561                                 else
 562                                         urbstat = 0;
 563                         }
 564                         if (usb_pipecontrol(urb->pipe)
 565                                         && (urbstat == -EREMOTEIO
 566                                                 || urbstat == 0)) {
 567
 568                                 /* NOTE if the status stage STALLs (why?),
 569                                  * this reports the wrong urb status.
 570                                  */
 571                                 spin_lock(&urb->lock);
 572                                 if (urb->status == -EINPROGRESS)
 573                                         urb->status = urbstat;
 574                                 spin_unlock(&urb->lock);
 575
 576                                 urb = NULL;
 577                                 ep->nextpid = USB_PID_ACK;
 578                         }
 579                         break;
 580                 case USB_PID_SETUP:
 581                         // PACKET("...ACK/setup_%02x qh%p\n", bank, ep);
 582                         if (urb->transfer_buffer_length == urb->actual_length)
 583                                 ep->nextpid = USB_PID_ACK;
 584                         else if (usb_pipeout(urb->pipe)) {
 585                                 usb_settoggle(udev, 0, 1, 1);
 586                                 ep->nextpid = USB_PID_OUT;
 587                         } else {
 588                                 usb_settoggle(udev, 0, 0, 1);
 589                                 ep->nextpid = USB_PID_IN;
 590                         }
 591                         break;
 592                 case USB_PID_ACK:
 593                         // PACKET("...ACK/status_%02x qh%p\n", bank, ep);
 594                         urbstat = 0;
 595                         break;
 596                 }
 597
 598         /* STALL stops all transfers */
 599         } else if (status & SL11H_STATMASK_STALL) {
 600                 PACKET("...STALL_%02x qh%p\n", bank, ep);
 601                 ep->nak_count = ep->error_count = 0;
 602                 urbstat = -EPIPE;
 603
 604         /* error? retry, until "3 strikes" */
 605         } else if (++ep->error_count >= 3) {
 606                 if (status & SL11H_STATMASK_TMOUT)
 607                         urbstat = -ETIMEDOUT;
 608                 else if (status & SL11H_STATMASK_OVF)
 609                         urbstat = -EOVERFLOW;
 610                 else
 611                         urbstat = -EPROTO;
 612                 ep->error_count = 0;
 613                 PACKET("...3STRIKES_%02x %02x qh%p stat %d\n",
 614                                 bank, status, ep, urbstat);
 615         }
 616
 617         if (urb && (urbstat != -EINPROGRESS || urb->status != -EINPROGRESS))
 618                 finish_request(sl811, ep, urb, regs, urbstat);
 619 }
 620
 621 static inline u8 checkdone(struct sl811 *sl811)
 622 {
 623         u8      ctl;
 624         u8      irqstat = 0;
 625
 626         if (sl811->active_a && time_before_eq(sl811->jiffies_a, jiffies)) {
 627                 ctl = sl811_read(sl811, SL811_EP_A(SL11H_HOSTCTLREG));
 628                 if (ctl & SL11H_HCTLMASK_ARM)
 629                         sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0);
 630                 DBG("%s DONE_A: ctrl %02x sts %02x\n",
 631                         (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost",
 632                         ctl,
 633                         sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG)));
 634                 irqstat |= SL11H_INTMASK_DONE_A;
 635         }
 636 #ifdef  USE_B
 637         if (sl811->active_b && time_before_eq(sl811->jiffies_b, jiffies)) {
 638                 ctl = sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG));
 639                 if (ctl & SL11H_HCTLMASK_ARM)
 640                         sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0);
 641                 DBG("%s DONE_B: ctrl %02x sts %02x\n",
 642                         (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost",
 643                         ctl,
 644                         sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG)));
 645                 irqstat |= SL11H_INTMASK_DONE_A;
 646         }
 647 #endif
 648         return irqstat;
 649 }
 650
 651 static irqreturn_t sl811h_irq(struct usb_hcd *hcd, struct pt_regs *regs)
 652 {
 653         struct sl811    *sl811 = hcd_to_sl811(hcd);
 654         u8              irqstat;
 655         irqreturn_t     ret = IRQ_NONE;
 656         unsigned        retries = 5;
 657
 658         spin_lock(&sl811->lock);
 659
 660 retry:
 661         irqstat = sl811_read(sl811, SL11H_IRQ_STATUS) & ~SL11H_INTMASK_DP;
 662         if (irqstat) {
 663                 sl811_write(sl811, SL11H_IRQ_STATUS, irqstat);
 664                 irqstat &= sl811->irq_enable;
 665         }
 666
 667 #ifdef  QUIRK2
 668         /* this may no longer be necessary ... */
 669         if (irqstat == 0) {
 670                 irqstat = checkdone(sl811);
 671                 if (irqstat)
 672                         sl811->stat_lost++;
 673         }
 674 #endif
 675
 676         /* USB packets, not necessarily handled in the order they're
 677          * issued ... that's fine if they're different endpoints.
 678          */
 679         if (irqstat & SL11H_INTMASK_DONE_A) {
 680                 done(sl811, sl811->active_a, SL811_EP_A(SL811_HOST_BUF), regs);
 681                 sl811->active_a = NULL;
 682                 sl811->stat_a++;
 683         }
 684 #ifdef USE_B
 685         if (irqstat & SL11H_INTMASK_DONE_B) {
 686                 done(sl811, sl811->active_b, SL811_EP_B(SL811_HOST_BUF), regs);
 687                 sl811->active_b = NULL;
 688                 sl811->stat_b++;
 689         }
 690 #endif
 691         if (irqstat & SL11H_INTMASK_SOFINTR) {
 692                 unsigned index;
 693
 694                 index = sl811->frame++ % (PERIODIC_SIZE - 1);
 695                 sl811->stat_sof++;
 696
 697                 /* be graceful about almost-inevitable periodic schedule
 698                  * overruns:  continue the previous frame's transfers iff
 699                  * this one has nothing scheduled.
 700                  */
 701                 if (sl811->next_periodic) {
 702                         // ERR("overrun to slot %d\n", index);
 703                         sl811->stat_overrun++;
 704                 }
 705                 if (sl811->periodic[index])
 706                         sl811->next_periodic = sl811->periodic[index];
 707         }
 708
 709         /* khubd manages debouncing and wakeup */
 710         if (irqstat & SL11H_INTMASK_INSRMV) {
 711                 sl811->stat_insrmv++;
 712
 713                 /* most stats are reset for each VBUS session */
 714                 sl811->stat_wake = 0;
 715                 sl811->stat_sof = 0;
 716                 sl811->stat_a = 0;
 717                 sl811->stat_b = 0;
 718                 sl811->stat_lost = 0;
 719
 720                 sl811->ctrl1 = 0;
 721                 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
 722
 723                 sl811->irq_enable = SL11H_INTMASK_INSRMV;
 724                 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
 725
 726                 /* usbcore nukes other pending transactions on disconnect */
 727                 if (sl811->active_a) {
 728                         sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0);
 729                         finish_request(sl811, sl811->active_a,
 730                                 container_of(sl811->active_a
 731                                                 ->hep->urb_list.next,
 732                                         struct urb, urb_list),
 733                                 NULL, -ESHUTDOWN);
 734                         sl811->active_a = NULL;
 735                 }
 736 #ifdef  USE_B
 737                 if (sl811->active_b) {
 738                         sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0);
 739                         finish_request(sl811, sl811->active_b,
 740                                 container_of(sl811->active_b
 741                                                 ->hep->urb_list.next,
 742                                         struct urb, urb_list),
 743                                 NULL, -ESHUTDOWN);
 744                         sl811->active_b = NULL;
 745                 }
 746 #endif
 747
 748                 /* port status seems weird until after reset, so
 749                  * force the reset and make khubd clean up later.
 750                  */
 751                 sl811->port1 |= (1 << USB_PORT_FEAT_C_CONNECTION)
 752                                 | (1 << USB_PORT_FEAT_CONNECTION);
 753
 754         } else if (irqstat & SL11H_INTMASK_RD) {
 755                 if (sl811->port1 & (1 << USB_PORT_FEAT_SUSPEND)) {
 756                         DBG("wakeup\n");
 757                         sl811->port1 |= 1 << USB_PORT_FEAT_C_SUSPEND;
 758                         sl811->stat_wake++;
 759                 } else
 760                         irqstat &= ~SL11H_INTMASK_RD;
 761         }
 762
 763         if (irqstat) {
 764                 if (sl811->port1 & (1 << USB_PORT_FEAT_ENABLE))
 765                         start_transfer(sl811);
 766                 ret = IRQ_HANDLED;
 767                 if (retries--)
 768                         goto retry;
 769         }
 770
 771         if (sl811->periodic_count == 0 && list_empty(&sl811->async))
 772                 sofirq_off(sl811);
 773         sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
 774
 775         spin_unlock(&sl811->lock);
 776
 777         return ret;
 778 }
 779
 780 /*-------------------------------------------------------------------------*/
 781
 782 /* usb 1.1 says max 90% of a frame is available for periodic transfers.
 783  * this driver doesn't promise that much since it's got to handle an
 784  * IRQ per packet; irq handling latencies also use up that time.
 785  *
 786  * NOTE:  the periodic schedule is a sparse tree, with the load for
 787  * each branch minimized.  see fig 3.5 in the OHCI spec for example.
 788  */
 789 #define MAX_PERIODIC_LOAD       500     /* out of 1000 usec */
 790
 791 static int balance(struct sl811 *sl811, u16 period, u16 load)
 792 {
 793         int     i, branch = -ENOSPC;
 794
 795         /* search for the least loaded schedule branch of that period
 796          * which has enough bandwidth left unreserved.
 797          */
 798         for (i = 0; i < period ; i++) {
 799                 if (branch < 0 || sl811->load[branch] > sl811->load[i]) {
 800                         int     j;
 801
 802                         for (j = i; j < PERIODIC_SIZE; j += period) {
 803                                 if ((sl811->load[j] + load)
 804                                                 > MAX_PERIODIC_LOAD)
 805                                         break;
 806                         }
 807                         if (j < PERIODIC_SIZE)
 808                                 continue;
 809                         branch = i;
 810                 }
 811         }
 812         return branch;
 813 }
 814
 815 /*-------------------------------------------------------------------------*/
 816
 817 static int sl811h_urb_enqueue(
 818         struct usb_hcd          *hcd,
 819         struct usb_host_endpoint *hep,
 820         struct urb              *urb,
 821         gfp_t                   mem_flags
 822 ) {
 823         struct sl811            *sl811 = hcd_to_sl811(hcd);
 824         struct usb_device       *udev = urb->dev;
 825         unsigned int            pipe = urb->pipe;
 826         int                     is_out = !usb_pipein(pipe);
 827         int                     type = usb_pipetype(pipe);
 828         int                     epnum = usb_pipeendpoint(pipe);
 829         struct sl811h_ep        *ep = NULL;
 830         unsigned long           flags;
 831         int                     i;
 832         int                     retval = 0;
 833
 834 #ifdef  DISABLE_ISO
 835         if (type == PIPE_ISOCHRONOUS)
 836                 return -ENOSPC;
 837 #endif
 838
 839         /* avoid all allocations within spinlocks */
 840         if (!hep->hcpriv)
 841                 ep = kzalloc(sizeof *ep, mem_flags);
 842
 843         spin_lock_irqsave(&sl811->lock, flags);
 844
 845         /* don't submit to a dead or disabled port */
 846         if (!(sl811->port1 & (1 << USB_PORT_FEAT_ENABLE))
 847                         || !HC_IS_RUNNING(hcd->state)) {
 848                 retval = -ENODEV;
 849                 kfree(ep);
 850                 goto fail;
 851         }
 852
 853         if (hep->hcpriv) {
 854                 kfree(ep);
 855                 ep = hep->hcpriv;
 856         } else if (!ep) {
 857                 retval = -ENOMEM;
 858                 goto fail;
 859
 860         } else {
 861                 INIT_LIST_HEAD(&ep->schedule);
 862                 ep->udev = usb_get_dev(udev);
 863                 ep->epnum = epnum;
 864                 ep->maxpacket = usb_maxpacket(udev, urb->pipe, is_out);
 865                 ep->defctrl = SL11H_HCTLMASK_ARM | SL11H_HCTLMASK_ENABLE;
 866                 usb_settoggle(udev, epnum, is_out, 0);
 867
 868                 if (type == PIPE_CONTROL)
 869                         ep->nextpid = USB_PID_SETUP;
 870                 else if (is_out)
 871                         ep->nextpid = USB_PID_OUT;
 872                 else
 873                         ep->nextpid = USB_PID_IN;
 874
 875                 if (ep->maxpacket > H_MAXPACKET) {
 876                         /* iso packets up to 240 bytes could work... */
 877                         DBG("dev %d ep%d maxpacket %d\n",
 878                                 udev->devnum, epnum, ep->maxpacket);
 879                         retval = -EINVAL;
 880                         goto fail;
 881                 }
 882
 883                 if (udev->speed == USB_SPEED_LOW) {
 884                         /* send preamble for external hub? */
 885                         if (!(sl811->ctrl1 & SL11H_CTL1MASK_LSPD))
 886                                 ep->defctrl |= SL11H_HCTLMASK_PREAMBLE;
 887                 }
 888                 switch (type) {
 889                 case PIPE_ISOCHRONOUS:
 890                 case PIPE_INTERRUPT:
 891                         if (urb->interval > PERIODIC_SIZE)
 892                                 urb->interval = PERIODIC_SIZE;
 893                         ep->period = urb->interval;
 894                         ep->branch = PERIODIC_SIZE;
 895                         if (type == PIPE_ISOCHRONOUS)
 896                                 ep->defctrl |= SL11H_HCTLMASK_ISOCH;
 897                         ep->load = usb_calc_bus_time(udev->speed, !is_out,
 898                                 (type == PIPE_ISOCHRONOUS),
 899                                 usb_maxpacket(udev, pipe, is_out))
 900                                         / 1000;
 901                         break;
 902                 }
 903
 904                 ep->hep = hep;
 905                 hep->hcpriv = ep;
 906         }
 907
 908         /* maybe put endpoint into schedule */
 909         switch (type) {
 910         case PIPE_CONTROL:
 911         case PIPE_BULK:
 912                 if (list_empty(&ep->schedule))
 913                         list_add_tail(&ep->schedule, &sl811->async);
 914                 break;
 915         case PIPE_ISOCHRONOUS:
 916         case PIPE_INTERRUPT:
 917                 urb->interval = ep->period;
 918                 if (ep->branch < PERIODIC_SIZE) {
 919                         /* NOTE:  the phase is correct here, but the value
 920                          * needs offsetting by the transfer queue depth.
 921                          * All current drivers ignore start_frame, so this
 922                          * is unlikely to ever matter...
 923                          */
 924                         urb->start_frame = (sl811->frame & (PERIODIC_SIZE - 1))
 925                                                 + ep->branch;
 926                         break;
 927                 }
 928
 929                 retval = balance(sl811, ep->period, ep->load);
 930                 if (retval < 0)
 931                         goto fail;
 932                 ep->branch = retval;
 933                 retval = 0;
 934                 urb->start_frame = (sl811->frame & (PERIODIC_SIZE - 1))
 935                                         + ep->branch;
 936
 937                 /* sort each schedule branch by period (slow before fast)
 938                  * to share the faster parts of the tree without needing
 939                  * dummy/placeholder nodes
 940                  */
 941                 DBG("schedule qh%d/%p branch %d\n", ep->period, ep, ep->branch);
 942                 for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
 943                         struct sl811h_ep        **prev = &sl811->periodic[i];
 944                         struct sl811h_ep        *here = *prev;
 945
 946                         while (here && ep != here) {
 947                                 if (ep->period > here->period)
 948                                         break;
 949                                 prev = &here->next;
 950                                 here = *prev;
 951                         }
 952                         if (ep != here) {
 953                                 ep->next = here;
 954                                 *prev = ep;
 955                         }
 956                         sl811->load[i] += ep->load;
 957                 }
 958                 sl811->periodic_count++;
 959                 hcd->self.bandwidth_allocated += ep->load / ep->period;
 960                 sofirq_on(sl811);
 961         }
 962
 963         /* in case of unlink-during-submit */
 964         spin_lock(&urb->lock);
 965         if (urb->status != -EINPROGRESS) {
 966                 spin_unlock(&urb->lock);
 967                 finish_request(sl811, ep, urb, NULL, 0);
 968                 retval = 0;
 969                 goto fail;
 970         }
 971         urb->hcpriv = hep;
 972         spin_unlock(&urb->lock);
 973
 974         start_transfer(sl811);
 975         sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
 976 fail:
 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)
 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 = 0;
 988
 989         spin_lock_irqsave(&sl811->lock, flags);
 990         hep = urb->hcpriv;
 991         if (!hep)
 992                 goto fail;
 993
 994         ep = hep->hcpriv;
 995         if (ep) {
 996                 /* finish right away if this urb can't be active ...
 997                  * note that some drivers wrongly expect delays
 998                  */
 999                 if (ep->hep->urb_list.next != &urb->urb_list) {
1000                         /* not front of queue?  never active */
1001
1002                 /* for active transfers, we expect an IRQ */
1003                 } else if (sl811->active_a == ep) {
1004                         if (time_before_eq(sl811->jiffies_a, jiffies)) {
1005                                 /* happens a lot with lowspeed?? */
1006                                 DBG("giveup on DONE_A: ctrl %02x sts %02x\n",
1007                                         sl811_read(sl811,
1008                                                 SL811_EP_A(SL11H_HOSTCTLREG)),
1009                                         sl811_read(sl811,
1010                                                 SL811_EP_A(SL11H_PKTSTATREG)));
1011                                 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG),
1012                                                 0);
1013                                 sl811->active_a = NULL;
1014                         } else
1015                                 urb = NULL;
1016 #ifdef  USE_B
1017                 } else if (sl811->active_b == ep) {
1018                         if (time_before_eq(sl811->jiffies_a, jiffies)) {
1019                                 /* happens a lot with lowspeed?? */
1020                                 DBG("giveup on DONE_B: ctrl %02x sts %02x\n",
1021                                         sl811_read(sl811,
1022                                                 SL811_EP_B(SL11H_HOSTCTLREG)),
1023                                         sl811_read(sl811,
1024                                                 SL811_EP_B(SL11H_PKTSTATREG)));
1025                                 sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG),
1026                                                 0);
1027                                 sl811->active_b = NULL;
1028                         } else
1029                                 urb = NULL;
1030 #endif
1031                 } else {
1032                         /* front of queue for inactive endpoint */
1033                 }
1034
1035                 if (urb)
1036                         finish_request(sl811, ep, urb, NULL, 0);
1037                 else
1038                         VDBG("dequeue, urb %p active %s; wait4irq\n", urb,
1039                                 (sl811->active_a == ep) ? "A" : "B");
1040         } else
1041 fail:
1042                 retval = -EINVAL;
1043         spin_unlock_irqrestore(&sl811->lock, flags);
1044         return retval;
1045 }
1046
1047 static void
1048 sl811h_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *hep)
1049 {
1050         struct sl811h_ep        *ep = hep->hcpriv;
1051
1052         if (!ep)
1053                 return;
1054
1055         /* assume we'd just wait for the irq */
1056         if (!list_empty(&hep->urb_list))
1057                 msleep(3);
1058         if (!list_empty(&hep->urb_list))
1059                 WARN("ep %p not empty?\n", ep);
1060
1061         usb_put_dev(ep->udev);
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, NULL) != 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_hub_suspend(struct usb_hcd *hcd)
1367 {
1368         // SOFs off
1369         DBG("%s\n", __FUNCTION__);
1370         return 0;
1371 }
1372
1373 static int
1374 sl811h_hub_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_hub_suspend      NULL
1384 #define sl811h_hub_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 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                 hcd->can_wakeup = sl811->board->can_wakeup;
1584                 hcd->power_budget = sl811->board->power * 2;
1585         }
1586
1587         /* enable power and interupts */
1588         port_power(sl811, 1);
1589
1590         return 0;
1591 }
1592
1593 /*-------------------------------------------------------------------------*/
1594
1595 static struct hc_driver sl811h_hc_driver = {
1596         .description =          hcd_name,
1597         .hcd_priv_size =        sizeof(struct sl811),
1598
1599         /*
1600          * generic hardware linkage
1601          */
1602         .irq =                  sl811h_irq,
1603         .flags =                HCD_USB11 | HCD_MEMORY,
1604
1605         /* Basic lifecycle operations */
1606         .start =                sl811h_start,
1607         .stop =                 sl811h_stop,
1608
1609         /*
1610          * managing i/o requests and associated device resources
1611          */
1612         .urb_enqueue =          sl811h_urb_enqueue,
1613         .urb_dequeue =          sl811h_urb_dequeue,
1614         .endpoint_disable =     sl811h_endpoint_disable,
1615
1616         /*
1617          * periodic schedule support
1618          */
1619         .get_frame_number =     sl811h_get_frame,
1620
1621         /*
1622          * root hub support
1623          */
1624         .hub_status_data =      sl811h_hub_status_data,
1625         .hub_control =          sl811h_hub_control,
1626         .hub_suspend =          sl811h_hub_suspend,
1627         .hub_resume =           sl811h_hub_resume,
1628 };
1629
1630 /*-------------------------------------------------------------------------*/
1631
1632 static int __devexit
1633 sl811h_remove(struct device *dev)
1634 {
1635         struct usb_hcd          *hcd = dev_get_drvdata(dev);
1636         struct sl811            *sl811 = hcd_to_sl811(hcd);
1637         struct platform_device  *pdev;
1638         struct resource         *res;
1639
1640         pdev = container_of(dev, struct platform_device, dev);
1641
1642         remove_debug_file(sl811);
1643         usb_remove_hcd(hcd);
1644
1645         /* some platforms may use IORESOURCE_IO */
1646         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1647         if (res)
1648                 iounmap(sl811->data_reg);
1649
1650         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1651         if (res)
1652                 iounmap(sl811->addr_reg);
1653
1654         usb_put_hcd(hcd);
1655         return 0;
1656 }
1657
1658 static int __devinit
1659 sl811h_probe(struct device *dev)
1660 {
1661         struct usb_hcd          *hcd;
1662         struct sl811            *sl811;
1663         struct platform_device  *pdev;
1664         struct resource         *addr, *data;
1665         int                     irq;
1666         void __iomem            *addr_reg;
1667         void __iomem            *data_reg;
1668         int                     retval;
1669         u8                      tmp, ioaddr = 0;
1670
1671         /* basic sanity checks first.  board-specific init logic should
1672          * have initialized these three resources and probably board
1673          * specific platform_data.  we don't probe for IRQs, and do only
1674          * minimal sanity checking.
1675          */
1676         pdev = container_of(dev, struct platform_device, dev);
1677         irq = platform_get_irq(pdev, 0);
1678         if (pdev->num_resources < 3 || irq < 0)
1679                 return -ENODEV;
1680
1681         /* refuse to confuse usbcore */
1682         if (dev->dma_mask) {
1683                 DBG("no we won't dma\n");
1684                 return -EINVAL;
1685         }
1686
1687         /* the chip may be wired for either kind of addressing */
1688         addr = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1689         data = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1690         retval = -EBUSY;
1691         if (!addr || !data) {
1692                 addr = platform_get_resource(pdev, IORESOURCE_IO, 0);
1693                 data = platform_get_resource(pdev, IORESOURCE_IO, 1);
1694                 if (!addr || !data)
1695                         return -ENODEV;
1696                 ioaddr = 1;
1697
1698                 addr_reg = (void __iomem *) addr->start;
1699                 data_reg = (void __iomem *) data->start;
1700         } else {
1701                 addr_reg = ioremap(addr->start, 1);
1702                 if (addr_reg == NULL) {
1703                         retval = -ENOMEM;
1704                         goto err2;
1705                 }
1706
1707                 data_reg = ioremap(data->start, 1);
1708                 if (data_reg == NULL) {
1709                         retval = -ENOMEM;
1710                         goto err4;
1711                 }
1712         }
1713
1714         /* allocate and initialize hcd */
1715         hcd = usb_create_hcd(&sl811h_hc_driver, dev, dev->bus_id);
1716         if (!hcd) {
1717                 retval = -ENOMEM;
1718                 goto err5;
1719         }
1720         hcd->rsrc_start = addr->start;
1721         sl811 = hcd_to_sl811(hcd);
1722
1723         spin_lock_init(&sl811->lock);
1724         INIT_LIST_HEAD(&sl811->async);
1725         sl811->board = dev->platform_data;
1726         init_timer(&sl811->timer);
1727         sl811->timer.function = sl811h_timer;
1728         sl811->timer.data = (unsigned long) sl811;
1729         sl811->addr_reg = addr_reg;
1730         sl811->data_reg = data_reg;
1731
1732         spin_lock_irq(&sl811->lock);
1733         port_power(sl811, 0);
1734         spin_unlock_irq(&sl811->lock);
1735         msleep(200);
1736
1737         tmp = sl811_read(sl811, SL11H_HWREVREG);
1738         switch (tmp >> 4) {
1739         case 1:
1740                 hcd->product_desc = "SL811HS v1.2";
1741                 break;
1742         case 2:
1743                 hcd->product_desc = "SL811HS v1.5";
1744                 break;
1745         default:
1746                 /* reject case 0, SL11S is less functional */
1747                 DBG("chiprev %02x\n", tmp);
1748                 retval = -ENXIO;
1749                 goto err6;
1750         }
1751
1752         /* The chip's IRQ is level triggered, active high.  A requirement
1753          * for platform device setup is to cope with things like signal
1754          * inverters (e.g. CF is active low) or working only with edge
1755          * triggers (e.g. most ARM CPUs).  Initial driver stress testing
1756          * was on a system with single edge triggering, so most sorts of
1757          * triggering arrangement should work.
1758          */
1759         retval = usb_add_hcd(hcd, irq, SA_INTERRUPT | SA_SHIRQ);
1760         if (retval != 0)
1761                 goto err6;
1762
1763         create_debug_file(sl811);
1764         return retval;
1765
1766  err6:
1767         usb_put_hcd(hcd);
1768  err5:
1769         if (!ioaddr)
1770                 iounmap(data_reg);
1771  err4:
1772         if (!ioaddr)
1773                 iounmap(addr_reg);
1774  err2:
1775         DBG("init error, %d\n", retval);
1776         return retval;
1777 }
1778
1779 #ifdef  CONFIG_PM
1780
1781 /* for this device there's no useful distinction between the controller
1782  * and its root hub, except that the root hub only gets direct PM calls
1783  * when CONFIG_USB_SUSPEND is enabled.
1784  */
1785
1786 static int
1787 sl811h_suspend(struct device *dev, pm_message_t state)
1788 {
1789         struct usb_hcd  *hcd = dev_get_drvdata(dev);
1790         struct sl811    *sl811 = hcd_to_sl811(hcd);
1791         int             retval = 0;
1792
1793         if (state.event == PM_EVENT_FREEZE)
1794                 retval = sl811h_hub_suspend(hcd);
1795         else if (state.event == PM_EVENT_SUSPEND)
1796                 port_power(sl811, 0);
1797         if (retval == 0)
1798                 dev->power.power_state = state;
1799         return retval;
1800 }
1801
1802 static int
1803 sl811h_resume(struct device *dev)
1804 {
1805         struct usb_hcd  *hcd = dev_get_drvdata(dev);
1806         struct sl811    *sl811 = hcd_to_sl811(hcd);
1807
1808         /* with no "check to see if VBUS is still powered" board hook,
1809          * let's assume it'd only be powered to enable remote wakeup.
1810          */
1811         if (dev->power.power_state.event == PM_EVENT_SUSPEND
1812                         || !hcd->can_wakeup) {
1813                 sl811->port1 = 0;
1814                 port_power(sl811, 1);
1815                 return 0;
1816         }
1817
1818         dev->power.power_state = PMSG_ON;
1819         return sl811h_hub_resume(hcd);
1820 }
1821
1822 #else
1823
1824 #define sl811h_suspend  NULL
1825 #define sl811h_resume   NULL
1826
1827 #endif
1828
1829
1830 /* this driver is exported so sl811_cs can depend on it */
1831 struct device_driver sl811h_driver = {
1832         .name =         (char *) hcd_name,
1833         .bus =          &platform_bus_type,
1834
1835         .probe =        sl811h_probe,
1836         .remove =       __devexit_p(sl811h_remove),
1837
1838         .suspend =      sl811h_suspend,
1839         .resume =       sl811h_resume,
1840 };
1841 EXPORT_SYMBOL(sl811h_driver);
1842
1843 /*-------------------------------------------------------------------------*/
1844
1845 static int __init sl811h_init(void)
1846 {
1847         if (usb_disabled())
1848                 return -ENODEV;
1849
1850         INFO("driver %s, %s\n", hcd_name, DRIVER_VERSION);
1851         return driver_register(&sl811h_driver);
1852 }
1853 module_init(sl811h_init);
1854
1855 static void __exit sl811h_cleanup(void)
1856 {
1857         driver_unregister(&sl811h_driver);
1858 }
1859 module_exit(sl811h_cleanup);