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 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  "15 Dec 2004"
  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 irqreturn_t sl811h_irq(int irq, void *_hcd, struct pt_regs *regs);
  94
  95 static void port_power(struct sl811 *sl811, int is_on)
  96 {
  97         struct usb_hcd  *hcd = sl811_to_hcd(sl811);
  98
  99         /* hub is inactive unless the port is powered */
 100         if (is_on) {
 101                 if (sl811->port1 & (1 << USB_PORT_FEAT_POWER))
 102                         return;
 103
 104                 sl811->port1 = (1 << USB_PORT_FEAT_POWER);
 105                 sl811->irq_enable = SL11H_INTMASK_INSRMV;
 106                 hcd->self.controller->power.power_state = PM_SUSPEND_ON;
 107         } else {
 108                 sl811->port1 = 0;
 109                 sl811->irq_enable = 0;
 110                 hcd->state = USB_STATE_HALT;
 111                 hcd->self.controller->power.power_state = PM_SUSPEND_DISK;
 112         }
 113         sl811->ctrl1 = 0;
 114         sl811_write(sl811, SL11H_IRQ_ENABLE, 0);
 115         sl811_write(sl811, SL11H_IRQ_STATUS, ~0);
 116
 117         if (sl811->board && sl811->board->port_power) {
 118                 /* switch VBUS, at 500mA unless hub power budget gets set */
 119                 DBG("power %s\n", is_on ? "on" : "off");
 120                 sl811->board->port_power(hcd->self.controller, is_on);
 121         }
 122
 123         /* reset as thoroughly as we can */
 124         if (sl811->board && sl811->board->reset)
 125                 sl811->board->reset(hcd->self.controller);
 126
 127         sl811_write(sl811, SL11H_IRQ_ENABLE, 0);
 128         sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
 129         sl811_write(sl811, SL811HS_CTLREG2, SL811HS_CTL2_INIT);
 130         sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
 131
 132         // if !is_on, put into lowpower mode now
 133 }
 134
 135 /*-------------------------------------------------------------------------*/
 136
 137 /* This is a PIO-only HCD.  Queueing appends URBs to the endpoint's queue,
 138  * and may start I/O.  Endpoint queues are scanned during completion irq
 139  * handlers (one per packet: ACK, NAK, faults, etc) and urb cancelation.
 140  *
 141  * Using an external DMA engine to copy a packet at a time could work,
 142  * though setup/teardown costs may be too big to make it worthwhile.
 143  */
 144
 145 /* SETUP starts a new control request.  Devices are not allowed to
 146  * STALL or NAK these; they must cancel any pending control requests.
 147  */
 148 static void setup_packet(
 149         struct sl811            *sl811,
 150         struct sl811h_ep        *ep,
 151         struct urb              *urb,
 152         u8                      bank,
 153         u8                      control
 154 )
 155 {
 156         u8                      addr;
 157         u8                      len;
 158         void __iomem            *data_reg;
 159
 160         addr = SL811HS_PACKET_BUF(bank == 0);
 161         len = sizeof(struct usb_ctrlrequest);
 162         data_reg = sl811->data_reg;
 163         sl811_write_buf(sl811, addr, urb->setup_packet, len);
 164
 165         /* autoincrementing */
 166         sl811_write(sl811, bank + SL11H_BUFADDRREG, addr);
 167         writeb(len, data_reg);
 168         writeb(SL_SETUP /* | ep->epnum */, data_reg);
 169         writeb(usb_pipedevice(urb->pipe), data_reg);
 170
 171         /* always OUT/data0 */ ;
 172         sl811_write(sl811, bank + SL11H_HOSTCTLREG,
 173                         control | SL11H_HCTLMASK_OUT);
 174         ep->length = 0;
 175         PACKET("SETUP qh%p\n", ep);
 176 }
 177
 178 /* STATUS finishes control requests, often after IN or OUT data packets */
 179 static void status_packet(
 180         struct sl811            *sl811,
 181         struct sl811h_ep        *ep,
 182         struct urb              *urb,
 183         u8                      bank,
 184         u8                      control
 185 )
 186 {
 187         int                     do_out;
 188         void __iomem            *data_reg;
 189
 190         do_out = urb->transfer_buffer_length && usb_pipein(urb->pipe);
 191         data_reg = sl811->data_reg;
 192
 193         /* autoincrementing */
 194         sl811_write(sl811, bank + SL11H_BUFADDRREG, 0);
 195         writeb(0, data_reg);
 196         writeb((do_out ? SL_OUT : SL_IN) /* | ep->epnum */, data_reg);
 197         writeb(usb_pipedevice(urb->pipe), data_reg);
 198
 199         /* always data1; sometimes IN */
 200         control |= SL11H_HCTLMASK_TOGGLE;
 201         if (do_out)
 202                 control |= SL11H_HCTLMASK_OUT;
 203         sl811_write(sl811, bank + SL11H_HOSTCTLREG, control);
 204         ep->length = 0;
 205         PACKET("STATUS%s/%s qh%p\n", ep->nak_count ? "/retry" : "",
 206                         do_out ? "out" : "in", ep);
 207 }
 208
 209 /* IN packets can be used with any type of endpoint. here we just
 210  * start the transfer, data from the peripheral may arrive later.
 211  * urb->iso_frame_desc is currently ignored here...
 212  */
 213 static void in_packet(
 214         struct sl811            *sl811,
 215         struct sl811h_ep        *ep,
 216         struct urb              *urb,
 217         u8                      bank,
 218         u8                      control
 219 )
 220 {
 221         u8                      addr;
 222         u8                      len;
 223         void __iomem            *data_reg;
 224
 225         /* avoid losing data on overflow */
 226         len = ep->maxpacket;
 227         addr = SL811HS_PACKET_BUF(bank == 0);
 228         if (!(control & SL11H_HCTLMASK_ISOCH)
 229                         && usb_gettoggle(urb->dev, ep->epnum, 0))
 230                 control |= SL11H_HCTLMASK_TOGGLE;
 231         data_reg = sl811->data_reg;
 232
 233         /* autoincrementing */
 234         sl811_write(sl811, bank + SL11H_BUFADDRREG, addr);
 235         writeb(len, data_reg);
 236         writeb(SL_IN | ep->epnum, data_reg);
 237         writeb(usb_pipedevice(urb->pipe), data_reg);
 238
 239         sl811_write(sl811, bank + SL11H_HOSTCTLREG, control);
 240         ep->length = min((int)len,
 241                         urb->transfer_buffer_length - urb->actual_length);
 242         PACKET("IN%s/%d qh%p len%d\n", ep->nak_count ? "/retry" : "",
 243                         !!usb_gettoggle(urb->dev, ep->epnum, 0), ep, len);
 244 }
 245
 246 /* OUT packets can be used with any type of endpoint.
 247  * urb->iso_frame_desc is currently ignored here...
 248  */
 249 static void out_packet(
 250         struct sl811            *sl811,
 251         struct sl811h_ep        *ep,
 252         struct urb              *urb,
 253         u8                      bank,
 254         u8                      control
 255 )
 256 {
 257         void                    *buf;
 258         u8                      addr;
 259         u8                      len;
 260         void __iomem            *data_reg;
 261
 262         buf = urb->transfer_buffer + urb->actual_length;
 263         prefetch(buf);
 264
 265         len = min((int)ep->maxpacket,
 266                         urb->transfer_buffer_length - urb->actual_length);
 267
 268         if (!(control & SL11H_HCTLMASK_ISOCH)
 269                         && usb_gettoggle(urb->dev, ep->epnum, 1))
 270                 control |= SL11H_HCTLMASK_TOGGLE;
 271         addr = SL811HS_PACKET_BUF(bank == 0);
 272         data_reg = sl811->data_reg;
 273
 274         sl811_write_buf(sl811, addr, buf, len);
 275
 276         /* autoincrementing */
 277         sl811_write(sl811, bank + SL11H_BUFADDRREG, addr);
 278         writeb(len, data_reg);
 279         writeb(SL_OUT | ep->epnum, data_reg);
 280         writeb(usb_pipedevice(urb->pipe), data_reg);
 281
 282         sl811_write(sl811, bank + SL11H_HOSTCTLREG,
 283                         control | SL11H_HCTLMASK_OUT);
 284         ep->length = len;
 285         PACKET("OUT%s/%d qh%p len%d\n", ep->nak_count ? "/retry" : "",
 286                         !!usb_gettoggle(urb->dev, ep->epnum, 1), ep, len);
 287 }
 288
 289 /*-------------------------------------------------------------------------*/
 290
 291 /* caller updates on-chip enables later */
 292
 293 static inline void sofirq_on(struct sl811 *sl811)
 294 {
 295         if (sl811->irq_enable & SL11H_INTMASK_SOFINTR)
 296                 return;
 297         VDBG("sof irq on\n");
 298         sl811->irq_enable |= SL11H_INTMASK_SOFINTR;
 299 }
 300
 301 static inline void sofirq_off(struct sl811 *sl811)
 302 {
 303         if (!(sl811->irq_enable & SL11H_INTMASK_SOFINTR))
 304                 return;
 305         VDBG("sof irq off\n");
 306         sl811->irq_enable &= ~SL11H_INTMASK_SOFINTR;
 307 }
 308
 309 /*-------------------------------------------------------------------------*/
 310
 311 /* pick the next endpoint for a transaction, and issue it.
 312  * frames start with periodic transfers (after whatever is pending
 313  * from the previous frame), and the rest of the time is async
 314  * transfers, scheduled round-robin.
 315  */
 316 static struct sl811h_ep *start(struct sl811 *sl811, u8 bank)
 317 {
 318         struct sl811h_ep        *ep;
 319         struct urb              *urb;
 320         int                     fclock;
 321         u8                      control;
 322
 323         /* use endpoint at schedule head */
 324         if (sl811->next_periodic) {
 325                 ep = sl811->next_periodic;
 326                 sl811->next_periodic = ep->next;
 327         } else {
 328                 if (sl811->next_async)
 329                         ep = sl811->next_async;
 330                 else if (!list_empty(&sl811->async))
 331                         ep = container_of(sl811->async.next,
 332                                         struct sl811h_ep, schedule);
 333                 else {
 334                         /* could set up the first fullspeed periodic
 335                          * transfer for the next frame ...
 336                          */
 337                         return NULL;
 338                 }
 339
 340 #ifdef USE_B
 341                 if ((bank && sl811->active_b == ep) || sl811->active_a == ep)
 342                         return NULL;
 343 #endif
 344
 345                 if (ep->schedule.next == &sl811->async)
 346                         sl811->next_async = NULL;
 347                 else
 348                         sl811->next_async = container_of(ep->schedule.next,
 349                                         struct sl811h_ep, schedule);
 350         }
 351
 352         if (unlikely(list_empty(&ep->hep->urb_list))) {
 353                 DBG("empty %p queue?\n", ep);
 354                 return NULL;
 355         }
 356
 357         urb = container_of(ep->hep->urb_list.next, struct urb, urb_list);
 358         control = ep->defctrl;
 359
 360         /* if this frame doesn't have enough time left to transfer this
 361          * packet, wait till the next frame.  too-simple algorithm...
 362          */
 363         fclock = sl811_read(sl811, SL11H_SOFTMRREG) << 6;
 364         fclock -= 100;          /* setup takes not much time */
 365         if (urb->dev->speed == USB_SPEED_LOW) {
 366                 if (control & SL11H_HCTLMASK_PREAMBLE) {
 367                         /* also note erratum 1: some hubs won't work */
 368                         fclock -= 800;
 369                 }
 370                 fclock -= ep->maxpacket << 8;
 371
 372                 /* erratum 2: AFTERSOF only works for fullspeed */
 373                 if (fclock < 0) {
 374                         if (ep->period)
 375                                 sl811->stat_overrun++;
 376                         sofirq_on(sl811);
 377                         return NULL;
 378                 }
 379         } else {
 380                 fclock -= 12000 / 19;   /* 19 64byte packets/msec */
 381                 if (fclock < 0) {
 382                         if (ep->period)
 383                                 sl811->stat_overrun++;
 384                         control |= SL11H_HCTLMASK_AFTERSOF;
 385
 386                 /* throttle bulk/control irq noise */
 387                 } else if (ep->nak_count)
 388                         control |= SL11H_HCTLMASK_AFTERSOF;
 389         }
 390
 391
 392         switch (ep->nextpid) {
 393         case USB_PID_IN:
 394                 in_packet(sl811, ep, urb, bank, control);
 395                 break;
 396         case USB_PID_OUT:
 397                 out_packet(sl811, ep, urb, bank, control);
 398                 break;
 399         case USB_PID_SETUP:
 400                 setup_packet(sl811, ep, urb, bank, control);
 401                 break;
 402         case USB_PID_ACK:               /* for control status */
 403                 status_packet(sl811, ep, urb, bank, control);
 404                 break;
 405         default:
 406                 DBG("bad ep%p pid %02x\n", ep, ep->nextpid);
 407                 ep = NULL;
 408         }
 409         return ep;
 410 }
 411
 412 #define MIN_JIFFIES     ((msecs_to_jiffies(2) > 1) ? msecs_to_jiffies(2) : 2)
 413
 414 static inline void start_transfer(struct sl811 *sl811)
 415 {
 416         if (sl811->port1 & (1 << USB_PORT_FEAT_SUSPEND))
 417                 return;
 418         if (sl811->active_a == NULL) {
 419                 sl811->active_a = start(sl811, SL811_EP_A(SL811_HOST_BUF));
 420                 if (sl811->active_a != NULL)
 421                         sl811->jiffies_a = jiffies + MIN_JIFFIES;
 422         }
 423 #ifdef USE_B
 424         if (sl811->active_b == NULL) {
 425                 sl811->active_b = start(sl811, SL811_EP_B(SL811_HOST_BUF));
 426                 if (sl811->active_b != NULL)
 427                         sl811->jiffies_b = jiffies + MIN_JIFFIES;
 428         }
 429 #endif
 430 }
 431
 432 static void finish_request(
 433         struct sl811            *sl811,
 434         struct sl811h_ep        *ep,
 435         struct urb              *urb,
 436         struct pt_regs          *regs,
 437         int                     status
 438 ) __releases(sl811->lock) __acquires(sl811->lock)
 439 {
 440         unsigned                i;
 441
 442         if (usb_pipecontrol(urb->pipe))
 443                 ep->nextpid = USB_PID_SETUP;
 444
 445         spin_lock(&urb->lock);
 446         if (urb->status == -EINPROGRESS)
 447                 urb->status = status;
 448         spin_unlock(&urb->lock);
 449
 450         spin_unlock(&sl811->lock);
 451         usb_hcd_giveback_urb(sl811_to_hcd(sl811), urb, regs);
 452         spin_lock(&sl811->lock);
 453
 454         /* leave active endpoints in the schedule */
 455         if (!list_empty(&ep->hep->urb_list))
 456                 return;
 457
 458         /* async deschedule? */
 459         if (!list_empty(&ep->schedule)) {
 460                 list_del_init(&ep->schedule);
 461                 if (ep == sl811->next_async)
 462                         sl811->next_async = NULL;
 463                 return;
 464         }
 465
 466         /* periodic deschedule */
 467         DBG("deschedule qh%d/%p branch %d\n", ep->period, ep, ep->branch);
 468         for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
 469                 struct sl811h_ep        *temp;
 470                 struct sl811h_ep        **prev = &sl811->periodic[i];
 471
 472                 while (*prev && ((temp = *prev) != ep))
 473                         prev = &temp->next;
 474                 if (*prev)
 475                         *prev = ep->next;
 476                 sl811->load[i] -= ep->load;
 477         }
 478         ep->branch = PERIODIC_SIZE;
 479         sl811->periodic_count--;
 480         sl811_to_hcd(sl811)->self.bandwidth_allocated
 481                 -= ep->load / ep->period;
 482         if (ep == sl811->next_periodic)
 483                 sl811->next_periodic = ep->next;
 484
 485         /* we might turn SOFs back on again for the async schedule */
 486         if (sl811->periodic_count == 0)
 487                 sofirq_off(sl811);
 488 }
 489
 490 static void
 491 done(struct sl811 *sl811, struct sl811h_ep *ep, u8 bank, struct pt_regs *regs)
 492 {
 493         u8                      status;
 494         struct urb              *urb;
 495         int                     urbstat = -EINPROGRESS;
 496
 497         if (unlikely(!ep))
 498                 return;
 499
 500         status = sl811_read(sl811, bank + SL11H_PKTSTATREG);
 501
 502         urb = container_of(ep->hep->urb_list.next, struct urb, urb_list);
 503
 504         /* we can safely ignore NAKs */
 505         if (status & SL11H_STATMASK_NAK) {
 506                 // PACKET("...NAK_%02x qh%p\n", bank, ep);
 507                 if (!ep->period)
 508                         ep->nak_count++;
 509                 ep->error_count = 0;
 510
 511         /* ACK advances transfer, toggle, and maybe queue */
 512         } else if (status & SL11H_STATMASK_ACK) {
 513                 struct usb_device       *udev = urb->dev;
 514                 int                     len;
 515                 unsigned char           *buf;
 516
 517                 /* urb->iso_frame_desc is currently ignored here... */
 518
 519                 ep->nak_count = ep->error_count = 0;
 520                 switch (ep->nextpid) {
 521                 case USB_PID_OUT:
 522                         // PACKET("...ACK/out_%02x qh%p\n", bank, ep);
 523                         urb->actual_length += ep->length;
 524                         usb_dotoggle(udev, ep->epnum, 1);
 525                         if (urb->actual_length
 526                                         == urb->transfer_buffer_length) {
 527                                 if (usb_pipecontrol(urb->pipe))
 528                                         ep->nextpid = USB_PID_ACK;
 529
 530                                 /* some bulk protocols terminate OUT transfers
 531                                  * by a short packet, using ZLPs not padding.
 532                                  */
 533                                 else if (ep->length < ep->maxpacket
 534                                                 || !(urb->transfer_flags
 535                                                         & URB_ZERO_PACKET))
 536                                         urbstat = 0;
 537                         }
 538                         break;
 539                 case USB_PID_IN:
 540                         // PACKET("...ACK/in_%02x qh%p\n", bank, ep);
 541                         buf = urb->transfer_buffer + urb->actual_length;
 542                         prefetchw(buf);
 543                         len = ep->maxpacket - sl811_read(sl811,
 544                                                 bank + SL11H_XFERCNTREG);
 545                         if (len > ep->length) {
 546                                 len = ep->length;
 547                                 urb->status = -EOVERFLOW;
 548                         }
 549                         urb->actual_length += len;
 550                         sl811_read_buf(sl811, SL811HS_PACKET_BUF(bank == 0),
 551                                         buf, len);
 552                         usb_dotoggle(udev, ep->epnum, 0);
 553                         if (urb->actual_length == urb->transfer_buffer_length)
 554                                 urbstat = 0;
 555                         else if (len < ep->maxpacket) {
 556                                 if (urb->transfer_flags & URB_SHORT_NOT_OK)
 557                                         urbstat = -EREMOTEIO;
 558                                 else
 559                                         urbstat = 0;
 560                         }
 561                         if (usb_pipecontrol(urb->pipe)
 562                                         && (urbstat == -EREMOTEIO
 563                                                 || urbstat == 0)) {
 564
 565                                 /* NOTE if the status stage STALLs (why?),
 566                                  * this reports the wrong urb status.
 567                                  */
 568                                 spin_lock(&urb->lock);
 569                                 if (urb->status == -EINPROGRESS)
 570                                         urb->status = urbstat;
 571                                 spin_unlock(&urb->lock);
 572
 573                                 urb = NULL;
 574                                 ep->nextpid = USB_PID_ACK;
 575                         }
 576                         break;
 577                 case USB_PID_SETUP:
 578                         // PACKET("...ACK/setup_%02x qh%p\n", bank, ep);
 579                         if (urb->transfer_buffer_length == urb->actual_length)
 580                                 ep->nextpid = USB_PID_ACK;
 581                         else if (usb_pipeout(urb->pipe)) {
 582                                 usb_settoggle(udev, 0, 1, 1);
 583                                 ep->nextpid = USB_PID_OUT;
 584                         } else {
 585                                 usb_settoggle(udev, 0, 0, 1);
 586                                 ep->nextpid = USB_PID_IN;
 587                         }
 588                         break;
 589                 case USB_PID_ACK:
 590                         // PACKET("...ACK/status_%02x qh%p\n", bank, ep);
 591                         urbstat = 0;
 592                         break;
 593                 }
 594
 595         /* STALL stops all transfers */
 596         } else if (status & SL11H_STATMASK_STALL) {
 597                 PACKET("...STALL_%02x qh%p\n", bank, ep);
 598                 ep->nak_count = ep->error_count = 0;
 599                 urbstat = -EPIPE;
 600
 601         /* error? retry, until "3 strikes" */
 602         } else if (++ep->error_count >= 3) {
 603                 if (status & SL11H_STATMASK_TMOUT)
 604                         urbstat = -ETIMEDOUT;
 605                 else if (status & SL11H_STATMASK_OVF)
 606                         urbstat = -EOVERFLOW;
 607                 else
 608                         urbstat = -EPROTO;
 609                 ep->error_count = 0;
 610                 PACKET("...3STRIKES_%02x %02x qh%p stat %d\n",
 611                                 bank, status, ep, urbstat);
 612         }
 613
 614         if (urb && (urbstat != -EINPROGRESS || urb->status != -EINPROGRESS))
 615                 finish_request(sl811, ep, urb, regs, urbstat);
 616 }
 617
 618 static inline u8 checkdone(struct sl811 *sl811)
 619 {
 620         u8      ctl;
 621         u8      irqstat = 0;
 622
 623         if (sl811->active_a && time_before_eq(sl811->jiffies_a, jiffies)) {
 624                 ctl = sl811_read(sl811, SL811_EP_A(SL11H_HOSTCTLREG));
 625                 if (ctl & SL11H_HCTLMASK_ARM)
 626                         sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0);
 627                 DBG("%s DONE_A: ctrl %02x sts %02x\n",
 628                         (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost",
 629                         ctl,
 630                         sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG)));
 631                 irqstat |= SL11H_INTMASK_DONE_A;
 632         }
 633 #ifdef  USE_B
 634         if (sl811->active_b && time_before_eq(sl811->jiffies_b, jiffies)) {
 635                 ctl = sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG));
 636                 if (ctl & SL11H_HCTLMASK_ARM)
 637                         sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0);
 638                 DBG("%s DONE_B: ctrl %02x sts %02x\n",
 639                         (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost",
 640                         ctl,
 641                         sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG)));
 642                 irqstat |= SL11H_INTMASK_DONE_A;
 643         }
 644 #endif
 645         return irqstat;
 646 }
 647
 648 static irqreturn_t sl811h_irq(int irq, void *_hcd, struct pt_regs *regs)
 649 {
 650         struct usb_hcd  *hcd = _hcd;
 651         struct sl811    *sl811 = hcd_to_sl811(hcd);
 652         u8              irqstat;
 653         irqreturn_t     ret = IRQ_NONE;
 654         unsigned        retries = 5;
 655
 656         spin_lock(&sl811->lock);
 657
 658 retry:
 659         irqstat = sl811_read(sl811, SL11H_IRQ_STATUS) & ~SL11H_INTMASK_DP;
 660         if (irqstat) {
 661                 sl811_write(sl811, SL11H_IRQ_STATUS, irqstat);
 662                 irqstat &= sl811->irq_enable;
 663         }
 664
 665 #ifdef  QUIRK2
 666         /* this may no longer be necessary ... */
 667         if (irqstat == 0 && ret == IRQ_NONE) {
 668                 irqstat = checkdone(sl811);
 669                 if (irqstat && irq != ~0)
 670                         sl811->stat_lost++;
 671         }
 672 #endif
 673
 674         /* USB packets, not necessarily handled in the order they're
 675          * issued ... that's fine if they're different endpoints.
 676          */
 677         if (irqstat & SL11H_INTMASK_DONE_A) {
 678                 done(sl811, sl811->active_a, SL811_EP_A(SL811_HOST_BUF), regs);
 679                 sl811->active_a = NULL;
 680                 sl811->stat_a++;
 681         }
 682 #ifdef USE_B
 683         if (irqstat & SL11H_INTMASK_DONE_B) {
 684                 done(sl811, sl811->active_b, SL811_EP_B(SL811_HOST_BUF), regs);
 685                 sl811->active_b = NULL;
 686                 sl811->stat_b++;
 687         }
 688 #endif
 689         if (irqstat & SL11H_INTMASK_SOFINTR) {
 690                 unsigned index;
 691
 692                 index = sl811->frame++ % (PERIODIC_SIZE - 1);
 693                 sl811->stat_sof++;
 694
 695                 /* be graceful about almost-inevitable periodic schedule
 696                  * overruns:  continue the previous frame's transfers iff
 697                  * this one has nothing scheduled.
 698                  */
 699                 if (sl811->next_periodic) {
 700                         // ERR("overrun to slot %d\n", index);
 701                         sl811->stat_overrun++;
 702                 }
 703                 if (sl811->periodic[index])
 704                         sl811->next_periodic = sl811->periodic[index];
 705         }
 706
 707         /* khubd manages debouncing and wakeup */
 708         if (irqstat & SL11H_INTMASK_INSRMV) {
 709                 sl811->stat_insrmv++;
 710
 711                 /* most stats are reset for each VBUS session */
 712                 sl811->stat_wake = 0;
 713                 sl811->stat_sof = 0;
 714                 sl811->stat_a = 0;
 715                 sl811->stat_b = 0;
 716                 sl811->stat_lost = 0;
 717
 718                 sl811->ctrl1 = 0;
 719                 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
 720
 721                 sl811->irq_enable = SL11H_INTMASK_INSRMV;
 722                 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
 723
 724                 /* usbcore nukes other pending transactions on disconnect */
 725                 if (sl811->active_a) {
 726                         sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0);
 727                         finish_request(sl811, sl811->active_a,
 728                                 container_of(sl811->active_a->hep->urb_list.next,
 729                                         struct urb, urb_list),
 730                                 NULL, -ESHUTDOWN);
 731                         sl811->active_a = NULL;
 732                 }
 733 #ifdef  USE_B
 734                 if (sl811->active_b) {
 735                         sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0);
 736                         finish_request(sl811, sl811->active_b,
 737                                 container_of(sl811->active_b->hep->urb_list.next,
 738                                         struct urb, urb_list),
 739                                 NULL, -ESHUTDOWN);
 740                         sl811->active_b = NULL;
 741                 }
 742 #endif
 743
 744                 /* port status seems wierd until after reset, so
 745                  * force the reset and make khubd clean up later.
 746                  */
 747                 sl811->port1 |= (1 << USB_PORT_FEAT_C_CONNECTION)
 748                                 | (1 << USB_PORT_FEAT_CONNECTION);
 749
 750         } else if (irqstat & SL11H_INTMASK_RD) {
 751                 if (sl811->port1 & (1 << USB_PORT_FEAT_SUSPEND)) {
 752                         DBG("wakeup\n");
 753                         sl811->port1 |= 1 << USB_PORT_FEAT_C_SUSPEND;
 754                         sl811->stat_wake++;
 755                 } else
 756                         irqstat &= ~SL11H_INTMASK_RD;
 757         }
 758
 759         if (irqstat) {
 760                 if (sl811->port1 & (1 << USB_PORT_FEAT_ENABLE))
 761                         start_transfer(sl811);
 762                 ret = IRQ_HANDLED;
 763                 hcd->saw_irq = 1;
 764                 if (retries--)
 765                         goto retry;
 766         }
 767
 768         if (sl811->periodic_count == 0 && list_empty(&sl811->async))
 769                 sofirq_off(sl811);
 770         sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
 771
 772         spin_unlock(&sl811->lock);
 773
 774         return ret;
 775 }
 776
 777 /*-------------------------------------------------------------------------*/
 778
 779 /* usb 1.1 says max 90% of a frame is available for periodic transfers.
 780  * this driver doesn't promise that much since it's got to handle an
 781  * IRQ per packet; irq handling latencies also use up that time.
 782  */
 783 #define MAX_PERIODIC_LOAD       500     /* out of 1000 usec */
 784
 785 static int balance(struct sl811 *sl811, u16 period, u16 load)
 786 {
 787         int     i, branch = -ENOSPC;
 788
 789         /* search for the least loaded schedule branch of that period
 790          * which has enough bandwidth left unreserved.
 791          */
 792         for (i = 0; i < period ; i++) {
 793                 if (branch < 0 || sl811->load[branch] > sl811->load[i]) {
 794                         int     j;
 795
 796                         for (j = i; j < PERIODIC_SIZE; j += period) {
 797                                 if ((sl811->load[j] + load)
 798                                                 > MAX_PERIODIC_LOAD)
 799                                         break;
 800                         }
 801                         if (j < PERIODIC_SIZE)
 802                                 continue;
 803                         branch = i;
 804                 }
 805         }
 806         return branch;
 807 }
 808
 809 /*-------------------------------------------------------------------------*/
 810
 811 static int sl811h_urb_enqueue(
 812         struct usb_hcd          *hcd,
 813         struct usb_host_endpoint *hep,
 814         struct urb              *urb,
 815         int                     mem_flags
 816 ) {
 817         struct sl811            *sl811 = hcd_to_sl811(hcd);
 818         struct usb_device       *udev = urb->dev;
 819         unsigned int            pipe = urb->pipe;
 820         int                     is_out = !usb_pipein(pipe);
 821         int                     type = usb_pipetype(pipe);
 822         int                     epnum = usb_pipeendpoint(pipe);
 823         struct sl811h_ep        *ep = NULL;
 824         unsigned long           flags;
 825         int                     i;
 826         int                     retval = 0;
 827
 828 #ifdef  DISABLE_ISO
 829         if (type == PIPE_ISOCHRONOUS)
 830                 return -ENOSPC;
 831 #endif
 832
 833         /* avoid all allocations within spinlocks */
 834         if (!hep->hcpriv)
 835                 ep = kcalloc(1, sizeof *ep, mem_flags);
 836
 837         spin_lock_irqsave(&sl811->lock, flags);
 838
 839         /* don't submit to a dead or disabled port */
 840         if (!(sl811->port1 & (1 << USB_PORT_FEAT_ENABLE))
 841                         || !HCD_IS_RUNNING(hcd->state)) {
 842                 retval = -ENODEV;
 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 = usb_get_dev(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                 hep->hcpriv = ep;
 898         }
 899
 900         /* maybe put endpoint into schedule */
 901         switch (type) {
 902         case PIPE_CONTROL:
 903         case PIPE_BULK:
 904                 if (list_empty(&ep->schedule))
 905                         list_add_tail(&ep->schedule, &sl811->async);
 906                 break;
 907         case PIPE_ISOCHRONOUS:
 908         case PIPE_INTERRUPT:
 909                 urb->interval = ep->period;
 910                 if (ep->branch < PERIODIC_SIZE)
 911                         break;
 912
 913                 retval = balance(sl811, ep->period, ep->load);
 914                 if (retval < 0)
 915                         goto fail;
 916                 ep->branch = retval;
 917                 retval = 0;
 918                 urb->start_frame = (sl811->frame & (PERIODIC_SIZE - 1))
 919                                         + ep->branch;
 920
 921                 /* sort each schedule branch by period (slow before fast)
 922                  * to share the faster parts of the tree without needing
 923                  * dummy/placeholder nodes
 924                  */
 925                 DBG("schedule qh%d/%p branch %d\n", ep->period, ep, ep->branch);
 926                 for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
 927                         struct sl811h_ep        **prev = &sl811->periodic[i];
 928                         struct sl811h_ep        *here = *prev;
 929
 930                         while (here && ep != here) {
 931                                 if (ep->period > here->period)
 932                                         break;
 933                                 prev = &here->next;
 934                                 here = *prev;
 935                         }
 936                         if (ep != here) {
 937                                 ep->next = here;
 938                                 *prev = ep;
 939                         }
 940                         sl811->load[i] += ep->load;
 941                 }
 942                 sl811->periodic_count++;
 943                 hcd->self.bandwidth_allocated += ep->load / ep->period;
 944                 sofirq_on(sl811);
 945         }
 946
 947         /* in case of unlink-during-submit */
 948         spin_lock(&urb->lock);
 949         if (urb->status != -EINPROGRESS) {
 950                 spin_unlock(&urb->lock);
 951                 finish_request(sl811, ep, urb, NULL, 0);
 952                 retval = 0;
 953                 goto fail;
 954         }
 955         urb->hcpriv = hep;
 956         spin_unlock(&urb->lock);
 957
 958         start_transfer(sl811);
 959         sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
 960 fail:
 961         spin_unlock_irqrestore(&sl811->lock, flags);
 962         return retval;
 963 }
 964
 965 static int sl811h_urb_dequeue(struct usb_hcd *hcd, struct urb *urb)
 966 {
 967         struct sl811            *sl811 = hcd_to_sl811(hcd);
 968         struct usb_host_endpoint *hep = urb->hcpriv;
 969         unsigned long           flags;
 970         struct sl811h_ep        *ep;
 971         int                     retval = 0;
 972
 973         if (!hep)
 974                 return -EINVAL;
 975
 976         spin_lock_irqsave(&sl811->lock, flags);
 977         ep = hep->hcpriv;
 978         if (ep) {
 979                 /* finish right away if this urb can't be active ...
 980                  * note that some drivers wrongly expect delays
 981                  */
 982                 if (ep->hep->urb_list.next != &urb->urb_list) {
 983                         /* not front of queue?  never active */
 984
 985                 /* for active transfers, we expect an IRQ */
 986                 } else if (sl811->active_a == ep) {
 987                         if (time_before_eq(sl811->jiffies_a, jiffies)) {
 988                                 /* happens a lot with lowspeed?? */
 989                                 DBG("giveup on DONE_A: ctrl %02x sts %02x\n",
 990                                         sl811_read(sl811,
 991                                                 SL811_EP_A(SL11H_HOSTCTLREG)),
 992                                         sl811_read(sl811,
 993                                                 SL811_EP_A(SL11H_PKTSTATREG)));
 994                                 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG),
 995                                                 0);
 996                                 sl811->active_a = NULL;
 997                         } else
 998                                 urb = NULL;
 999 #ifdef  USE_B
1000                 } else if (sl811->active_b == ep) {
1001                         if (time_before_eq(sl811->jiffies_a, jiffies)) {
1002                                 /* happens a lot with lowspeed?? */
1003                                 DBG("giveup on DONE_B: ctrl %02x sts %02x\n",
1004                                         sl811_read(sl811,
1005                                                 SL811_EP_B(SL11H_HOSTCTLREG)),
1006                                         sl811_read(sl811,
1007                                                 SL811_EP_B(SL11H_PKTSTATREG)));
1008                                 sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG),
1009                                                 0);
1010                                 sl811->active_b = NULL;
1011                         } else
1012                                 urb = NULL;
1013 #endif
1014                 } else {
1015                         /* front of queue for inactive endpoint */
1016                 }
1017
1018                 if (urb)
1019                         finish_request(sl811, ep, urb, NULL, 0);
1020                 else
1021                         VDBG("dequeue, urb %p active %s; wait4irq\n", urb,
1022                                 (sl811->active_a == ep) ? "A" : "B");
1023         } else
1024                 retval = -EINVAL;
1025         spin_unlock_irqrestore(&sl811->lock, flags);
1026         return retval;
1027 }
1028
1029 static void
1030 sl811h_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *hep)
1031 {
1032         struct sl811h_ep        *ep = hep->hcpriv;
1033
1034         if (!ep)
1035                 return;
1036
1037         /* assume we'd just wait for the irq */
1038         if (!list_empty(&hep->urb_list))
1039                 msleep(3);
1040         if (!list_empty(&hep->urb_list))
1041                 WARN("ep %p not empty?\n", ep);
1042
1043         usb_put_dev(ep->udev);
1044         kfree(ep);
1045         hep->hcpriv = NULL;
1046 }
1047
1048 static int
1049 sl811h_get_frame(struct usb_hcd *hcd)
1050 {
1051         struct sl811 *sl811 = hcd_to_sl811(hcd);
1052
1053         /* wrong except while periodic transfers are scheduled;
1054          * never matches the on-the-wire frame;
1055          * subject to overruns.
1056          */
1057         return sl811->frame;
1058 }
1059
1060
1061 /*-------------------------------------------------------------------------*/
1062
1063 /* the virtual root hub timer IRQ checks for hub status */
1064 static int
1065 sl811h_hub_status_data(struct usb_hcd *hcd, char *buf)
1066 {
1067         struct sl811 *sl811 = hcd_to_sl811(hcd);
1068 #ifdef  QUIRK3
1069         unsigned long flags;
1070
1071         /* non-SMP HACK: use root hub timer as i/o watchdog
1072          * this seems essential when SOF IRQs aren't in use...
1073          */
1074         local_irq_save(flags);
1075         if (!timer_pending(&sl811->timer)) {
1076                 if (sl811h_irq(~0, sl811, NULL) != IRQ_NONE)
1077                         sl811->stat_lost++;
1078         }
1079         local_irq_restore(flags);
1080 #endif
1081
1082         if (!(sl811->port1 & (0xffff << 16)))
1083                 return 0;
1084
1085         /* tell khubd port 1 changed */
1086         *buf = (1 << 1);
1087         return 1;
1088 }
1089
1090 static void
1091 sl811h_hub_descriptor (
1092         struct sl811                    *sl811,
1093         struct usb_hub_descriptor       *desc
1094 ) {
1095         u16             temp = 0;
1096
1097         desc->bDescriptorType = 0x29;
1098         desc->bHubContrCurrent = 0;
1099
1100         desc->bNbrPorts = 1;
1101         desc->bDescLength = 9;
1102
1103         /* per-port power switching (gang of one!), or none */
1104         desc->bPwrOn2PwrGood = 0;
1105         if (sl811->board && sl811->board->port_power) {
1106                 desc->bPwrOn2PwrGood = sl811->board->potpg;
1107                 if (!desc->bPwrOn2PwrGood)
1108                         desc->bPwrOn2PwrGood = 10;
1109                 temp = 0x0001;
1110         } else
1111                 temp = 0x0002;
1112
1113         /* no overcurrent errors detection/handling */
1114         temp |= 0x0010;
1115
1116         desc->wHubCharacteristics = (__force __u16)cpu_to_le16(temp);
1117
1118         /* two bitmaps:  ports removable, and legacy PortPwrCtrlMask */
1119         desc->bitmap[0] = 1 << 1;
1120         desc->bitmap[1] = ~0;
1121 }
1122
1123 static void
1124 sl811h_timer(unsigned long _sl811)
1125 {
1126         struct sl811    *sl811 = (void *) _sl811;
1127         unsigned long   flags;
1128         u8              irqstat;
1129         u8              signaling = sl811->ctrl1 & SL11H_CTL1MASK_FORCE;
1130         const u32       mask = (1 << USB_PORT_FEAT_CONNECTION)
1131                                 | (1 << USB_PORT_FEAT_ENABLE)
1132                                 | (1 << USB_PORT_FEAT_LOWSPEED);
1133
1134         spin_lock_irqsave(&sl811->lock, flags);
1135
1136         /* stop special signaling */
1137         sl811->ctrl1 &= ~SL11H_CTL1MASK_FORCE;
1138         sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1139         udelay(3);
1140
1141         irqstat = sl811_read(sl811, SL11H_IRQ_STATUS);
1142
1143         switch (signaling) {
1144         case SL11H_CTL1MASK_SE0:
1145                 DBG("end reset\n");
1146                 sl811->port1 = (1 << USB_PORT_FEAT_C_RESET)
1147                                 | (1 << USB_PORT_FEAT_POWER);
1148                 sl811->ctrl1 = 0;
1149                 /* don't wrongly ack RD */
1150                 if (irqstat & SL11H_INTMASK_INSRMV)
1151                         irqstat &= ~SL11H_INTMASK_RD;
1152                 break;
1153         case SL11H_CTL1MASK_K:
1154                 DBG("end resume\n");
1155                 sl811->port1 &= ~(1 << USB_PORT_FEAT_SUSPEND);
1156                 break;
1157         default:
1158                 DBG("odd timer signaling: %02x\n", signaling);
1159                 break;
1160         }
1161         sl811_write(sl811, SL11H_IRQ_STATUS, irqstat);
1162
1163         if (irqstat & SL11H_INTMASK_RD) {
1164                 /* usbcore nukes all pending transactions on disconnect */
1165                 if (sl811->port1 & (1 << USB_PORT_FEAT_CONNECTION))
1166                         sl811->port1 |= (1 << USB_PORT_FEAT_C_CONNECTION)
1167                                         | (1 << USB_PORT_FEAT_C_ENABLE);
1168                 sl811->port1 &= ~mask;
1169                 sl811->irq_enable = SL11H_INTMASK_INSRMV;
1170         } else {
1171                 sl811->port1 |= mask;
1172                 if (irqstat & SL11H_INTMASK_DP)
1173                         sl811->port1 &= ~(1 << USB_PORT_FEAT_LOWSPEED);
1174                 sl811->irq_enable = SL11H_INTMASK_INSRMV | SL11H_INTMASK_RD;
1175         }
1176
1177         if (sl811->port1 & (1 << USB_PORT_FEAT_CONNECTION)) {
1178                 u8      ctrl2 = SL811HS_CTL2_INIT;
1179
1180                 sl811->irq_enable |= SL11H_INTMASK_DONE_A;
1181 #ifdef USE_B
1182                 sl811->irq_enable |= SL11H_INTMASK_DONE_B;
1183 #endif
1184                 if (sl811->port1 & (1 << USB_PORT_FEAT_LOWSPEED)) {
1185                         sl811->ctrl1 |= SL11H_CTL1MASK_LSPD;
1186                         ctrl2 |= SL811HS_CTL2MASK_DSWAP;
1187                 }
1188
1189                 /* start SOFs flowing, kickstarting with A registers */
1190                 sl811->ctrl1 |= SL11H_CTL1MASK_SOF_ENA;
1191                 sl811_write(sl811, SL11H_SOFLOWREG, 0xe0);
1192                 sl811_write(sl811, SL811HS_CTLREG2, ctrl2);
1193
1194                 /* autoincrementing */
1195                 sl811_write(sl811, SL811_EP_A(SL11H_BUFLNTHREG), 0);
1196                 writeb(SL_SOF, sl811->data_reg);
1197                 writeb(0, sl811->data_reg);
1198                 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG),
1199                                 SL11H_HCTLMASK_ARM);
1200
1201                 /* khubd provides debounce delay */
1202         } else {
1203                 sl811->ctrl1 = 0;
1204         }
1205         sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1206
1207         /* reenable irqs */
1208         sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
1209         spin_unlock_irqrestore(&sl811->lock, flags);
1210 }
1211
1212 static int
1213 sl811h_hub_control(
1214         struct usb_hcd  *hcd,
1215         u16             typeReq,
1216         u16             wValue,
1217         u16             wIndex,
1218         char            *buf,
1219         u16             wLength
1220 ) {
1221         struct sl811    *sl811 = hcd_to_sl811(hcd);
1222         int             retval = 0;
1223         unsigned long   flags;
1224
1225         spin_lock_irqsave(&sl811->lock, flags);
1226
1227         switch (typeReq) {
1228         case ClearHubFeature:
1229         case SetHubFeature:
1230                 switch (wValue) {
1231                 case C_HUB_OVER_CURRENT:
1232                 case C_HUB_LOCAL_POWER:
1233                         break;
1234                 default:
1235                         goto error;
1236                 }
1237                 break;
1238         case ClearPortFeature:
1239                 if (wIndex != 1 || wLength != 0)
1240                         goto error;
1241
1242                 switch (wValue) {
1243                 case USB_PORT_FEAT_ENABLE:
1244                         sl811->port1 &= (1 << USB_PORT_FEAT_POWER);
1245                         sl811->ctrl1 = 0;
1246                         sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1247                         sl811->irq_enable = SL11H_INTMASK_INSRMV;
1248                         sl811_write(sl811, SL11H_IRQ_ENABLE,
1249                                                 sl811->irq_enable);
1250                         break;
1251                 case USB_PORT_FEAT_SUSPEND:
1252                         if (!(sl811->port1 & (1 << USB_PORT_FEAT_SUSPEND)))
1253                                 break;
1254
1255                         /* 20 msec of resume/K signaling, other irqs blocked */
1256                         DBG("start resume...\n");
1257                         sl811->irq_enable = 0;
1258                         sl811_write(sl811, SL11H_IRQ_ENABLE,
1259                                                 sl811->irq_enable);
1260                         sl811->ctrl1 |= SL11H_CTL1MASK_K;
1261                         sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1262
1263                         mod_timer(&sl811->timer, jiffies
1264                                         + msecs_to_jiffies(20));
1265                         break;
1266                 case USB_PORT_FEAT_POWER:
1267                         port_power(sl811, 0);
1268                         break;
1269                 case USB_PORT_FEAT_C_ENABLE:
1270                 case USB_PORT_FEAT_C_SUSPEND:
1271                 case USB_PORT_FEAT_C_CONNECTION:
1272                 case USB_PORT_FEAT_C_OVER_CURRENT:
1273                 case USB_PORT_FEAT_C_RESET:
1274                         break;
1275                 default:
1276                         goto error;
1277                 }
1278                 sl811->port1 &= ~(1 << wValue);
1279                 break;
1280         case GetHubDescriptor:
1281                 sl811h_hub_descriptor(sl811, (struct usb_hub_descriptor *) buf);
1282                 break;
1283         case GetHubStatus:
1284                 *(__le32 *) buf = cpu_to_le32(0);
1285                 break;
1286         case GetPortStatus:
1287                 if (wIndex != 1)
1288                         goto error;
1289                 *(__le32 *) buf = cpu_to_le32(sl811->port1);
1290
1291 #ifndef VERBOSE
1292         if (*(u16*)(buf+2))     /* only if wPortChange is interesting */
1293 #endif
1294                 DBG("GetPortStatus %08x\n", sl811->port1);
1295                 break;
1296         case SetPortFeature:
1297                 if (wIndex != 1 || wLength != 0)
1298                         goto error;
1299                 switch (wValue) {
1300                 case USB_PORT_FEAT_SUSPEND:
1301                         if (sl811->port1 & (1 << USB_PORT_FEAT_RESET))
1302                                 goto error;
1303                         if (!(sl811->port1 & (1 << USB_PORT_FEAT_ENABLE)))
1304                                 goto error;
1305
1306                         DBG("suspend...\n");
1307                         sl811->ctrl1 &= ~SL11H_CTL1MASK_SOF_ENA;
1308                         sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1309                         break;
1310                 case USB_PORT_FEAT_POWER:
1311                         port_power(sl811, 1);
1312                         break;
1313                 case USB_PORT_FEAT_RESET:
1314                         if (sl811->port1 & (1 << USB_PORT_FEAT_SUSPEND))
1315                                 goto error;
1316                         if (!(sl811->port1 & (1 << USB_PORT_FEAT_POWER)))
1317                                 break;
1318
1319                         /* 50 msec of reset/SE0 signaling, irqs blocked */
1320                         sl811->irq_enable = 0;
1321                         sl811_write(sl811, SL11H_IRQ_ENABLE,
1322                                                 sl811->irq_enable);
1323                         sl811->ctrl1 = SL11H_CTL1MASK_SE0;
1324                         sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1325                         sl811->port1 |= (1 << USB_PORT_FEAT_RESET);
1326                         mod_timer(&sl811->timer, jiffies
1327                                         + msecs_to_jiffies(50));
1328                         break;
1329                 default:
1330                         goto error;
1331                 }
1332                 sl811->port1 |= 1 << wValue;
1333                 break;
1334
1335         default:
1336 error:
1337                 /* "protocol stall" on error */
1338                 retval = -EPIPE;
1339         }
1340
1341         spin_unlock_irqrestore(&sl811->lock, flags);
1342         return retval;
1343 }
1344
1345 #ifdef  CONFIG_PM
1346
1347 static int
1348 sl811h_hub_suspend(struct usb_hcd *hcd)
1349 {
1350         // SOFs off
1351         DBG("%s\n", __FUNCTION__);
1352         return 0;
1353 }
1354
1355 static int
1356 sl811h_hub_resume(struct usb_hcd *hcd)
1357 {
1358         // SOFs on
1359         DBG("%s\n", __FUNCTION__);
1360         return 0;
1361 }
1362
1363 #else
1364
1365 #define sl811h_hub_suspend      NULL
1366 #define sl811h_hub_resume       NULL
1367
1368 #endif
1369
1370
1371 /*-------------------------------------------------------------------------*/
1372
1373 #ifdef STUB_DEBUG_FILE
1374
1375 static inline void create_debug_file(struct sl811 *sl811) { }
1376 static inline void remove_debug_file(struct sl811 *sl811) { }
1377
1378 #else
1379
1380 #include <linux/proc_fs.h>
1381 #include <linux/seq_file.h>
1382
1383 static void dump_irq(struct seq_file *s, char *label, u8 mask)
1384 {
1385         seq_printf(s, "%s %02x%s%s%s%s%s%s\n", label, mask,
1386                 (mask & SL11H_INTMASK_DONE_A) ? " done_a" : "",
1387                 (mask & SL11H_INTMASK_DONE_B) ? " done_b" : "",
1388                 (mask & SL11H_INTMASK_SOFINTR) ? " sof" : "",
1389                 (mask & SL11H_INTMASK_INSRMV) ? " ins/rmv" : "",
1390                 (mask & SL11H_INTMASK_RD) ? " rd" : "",
1391                 (mask & SL11H_INTMASK_DP) ? " dp" : "");
1392 }
1393
1394 static int proc_sl811h_show(struct seq_file *s, void *unused)
1395 {
1396         struct sl811            *sl811 = s->private;
1397         struct sl811h_ep        *ep;
1398         unsigned                i;
1399
1400         seq_printf(s, "%s\n%s version %s\nportstatus[1] = %08x\n",
1401                 sl811_to_hcd(sl811)->product_desc,
1402                 hcd_name, DRIVER_VERSION,
1403                 sl811->port1);
1404
1405         seq_printf(s, "insert/remove: %ld\n", sl811->stat_insrmv);
1406         seq_printf(s, "current session:  done_a %ld done_b %ld "
1407                         "wake %ld sof %ld overrun %ld lost %ld\n\n",
1408                 sl811->stat_a, sl811->stat_b,
1409                 sl811->stat_wake, sl811->stat_sof,
1410                 sl811->stat_overrun, sl811->stat_lost);
1411
1412         spin_lock_irq(&sl811->lock);
1413
1414         if (sl811->ctrl1 & SL11H_CTL1MASK_SUSPEND)
1415                 seq_printf(s, "(suspended)\n\n");
1416         else {
1417                 u8      t = sl811_read(sl811, SL11H_CTLREG1);
1418
1419                 seq_printf(s, "ctrl1 %02x%s%s%s%s\n", t,
1420                         (t & SL11H_CTL1MASK_SOF_ENA) ? " sofgen" : "",
1421                         ({char *s; switch (t & SL11H_CTL1MASK_FORCE) {
1422                         case SL11H_CTL1MASK_NORMAL: s = ""; break;
1423                         case SL11H_CTL1MASK_SE0: s = " se0/reset"; break;
1424                         case SL11H_CTL1MASK_K: s = " k/resume"; break;
1425                         default: s = "j"; break;
1426                         }; s; }),
1427                         (t & SL11H_CTL1MASK_LSPD) ? " lowspeed" : "",
1428                         (t & SL11H_CTL1MASK_SUSPEND) ? " suspend" : "");
1429
1430                 dump_irq(s, "irq_enable",
1431                                 sl811_read(sl811, SL11H_IRQ_ENABLE));
1432                 dump_irq(s, "irq_status",
1433                                 sl811_read(sl811, SL11H_IRQ_STATUS));
1434                 seq_printf(s, "frame clocks remaining:  %d\n",
1435                                 sl811_read(sl811, SL11H_SOFTMRREG) << 6);
1436         }
1437
1438         seq_printf(s, "A: qh%p ctl %02x sts %02x\n", sl811->active_a,
1439                 sl811_read(sl811, SL811_EP_A(SL11H_HOSTCTLREG)),
1440                 sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG)));
1441         seq_printf(s, "B: qh%p ctl %02x sts %02x\n", sl811->active_b,
1442                 sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG)),
1443                 sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG)));
1444         seq_printf(s, "\n");
1445         list_for_each_entry (ep, &sl811->async, schedule) {
1446                 struct urb              *urb;
1447
1448                 seq_printf(s, "%s%sqh%p, ep%d%s, maxpacket %d"
1449                                         " nak %d err %d\n",
1450                         (ep == sl811->active_a) ? "(A) " : "",
1451                         (ep == sl811->active_b) ? "(B) " : "",
1452                         ep, ep->epnum,
1453                         ({ char *s; switch (ep->nextpid) {
1454                         case USB_PID_IN: s = "in"; break;
1455                         case USB_PID_OUT: s = "out"; break;
1456                         case USB_PID_SETUP: s = "setup"; break;
1457                         case USB_PID_ACK: s = "status"; break;
1458                         default: s = "?"; break;
1459                         }; s;}),
1460                         ep->maxpacket,
1461                         ep->nak_count, ep->error_count);
1462                 list_for_each_entry (urb, &ep->hep->urb_list, urb_list) {
1463                         seq_printf(s, "  urb%p, %d/%d\n", urb,
1464                                 urb->actual_length,
1465                                 urb->transfer_buffer_length);
1466                 }
1467         }
1468         if (!list_empty(&sl811->async))
1469                 seq_printf(s, "\n");
1470
1471         seq_printf(s, "periodic size= %d\n", PERIODIC_SIZE);
1472
1473         for (i = 0; i < PERIODIC_SIZE; i++) {
1474                 ep = sl811->periodic[i];
1475                 if (!ep)
1476                         continue;
1477                 seq_printf(s, "%2d [%3d]:\n", i, sl811->load[i]);
1478
1479                 /* DUMB: prints shared entries multiple times */
1480                 do {
1481                         seq_printf(s,
1482                                 "   %s%sqh%d/%p (%sdev%d ep%d%s max %d) "
1483                                         "err %d\n",
1484                                 (ep == sl811->active_a) ? "(A) " : "",
1485                                 (ep == sl811->active_b) ? "(B) " : "",
1486                                 ep->period, ep,
1487                                 (ep->udev->speed == USB_SPEED_FULL)
1488                                         ? "" : "ls ",
1489                                 ep->udev->devnum, ep->epnum,
1490                                 (ep->epnum == 0) ? ""
1491                                         : ((ep->nextpid == USB_PID_IN)
1492                                                 ? "in"
1493                                                 : "out"),
1494                                 ep->maxpacket, ep->error_count);
1495                         ep = ep->next;
1496                 } while (ep);
1497         }
1498
1499         spin_unlock_irq(&sl811->lock);
1500         seq_printf(s, "\n");
1501
1502         return 0;
1503 }
1504
1505 static int proc_sl811h_open(struct inode *inode, struct file *file)
1506 {
1507         return single_open(file, proc_sl811h_show, PDE(inode)->data);
1508 }
1509
1510 static struct file_operations proc_ops = {
1511         .open           = proc_sl811h_open,
1512         .read           = seq_read,
1513         .llseek         = seq_lseek,
1514         .release        = single_release,
1515 };
1516
1517 /* expect just one sl811 per system */
1518 static const char proc_filename[] = "driver/sl811h";
1519
1520 static void create_debug_file(struct sl811 *sl811)
1521 {
1522         struct proc_dir_entry *pde;
1523
1524         pde = create_proc_entry(proc_filename, 0, NULL);
1525         if (pde == NULL)
1526                 return;
1527
1528         pde->proc_fops = &proc_ops;
1529         pde->data = sl811;
1530         sl811->pde = pde;
1531 }
1532
1533 static void remove_debug_file(struct sl811 *sl811)
1534 {
1535         if (sl811->pde)
1536                 remove_proc_entry(proc_filename, NULL);
1537 }
1538
1539 #endif
1540
1541 /*-------------------------------------------------------------------------*/
1542
1543 static void
1544 sl811h_stop(struct usb_hcd *hcd)
1545 {
1546         struct sl811    *sl811 = hcd_to_sl811(hcd);
1547         unsigned long   flags;
1548
1549         del_timer_sync(&hcd->rh_timer);
1550
1551         spin_lock_irqsave(&sl811->lock, flags);
1552         port_power(sl811, 0);
1553         spin_unlock_irqrestore(&sl811->lock, flags);
1554 }
1555
1556 static int
1557 sl811h_start(struct usb_hcd *hcd)
1558 {
1559         struct sl811            *sl811 = hcd_to_sl811(hcd);
1560         struct usb_device       *udev;
1561
1562         /* chip has been reset, VBUS power is off */
1563
1564         udev = usb_alloc_dev(NULL, &hcd->self, 0);
1565         if (!udev)
1566                 return -ENOMEM;
1567
1568         udev->speed = USB_SPEED_FULL;
1569         hcd->state = USB_STATE_RUNNING;
1570
1571         if (sl811->board)
1572                 hcd->can_wakeup = sl811->board->can_wakeup;
1573
1574         if (hcd_register_root(udev, hcd) != 0) {
1575                 usb_put_dev(udev);
1576                 sl811h_stop(hcd);
1577                 return -ENODEV;
1578         }
1579
1580         if (sl811->board && sl811->board->power)
1581                 hub_set_power_budget(udev, sl811->board->power * 2);
1582
1583         return 0;
1584 }
1585
1586 /*-------------------------------------------------------------------------*/
1587
1588 static struct hc_driver sl811h_hc_driver = {
1589         .description =          hcd_name,
1590         .hcd_priv_size =        sizeof(struct sl811),
1591
1592         /*
1593          * generic hardware linkage
1594          */
1595         .flags =                HCD_USB11,
1596
1597         /*
1598          * managing i/o requests and associated device resources
1599          */
1600         .urb_enqueue =          sl811h_urb_enqueue,
1601         .urb_dequeue =          sl811h_urb_dequeue,
1602         .endpoint_disable =     sl811h_endpoint_disable,
1603
1604         /*
1605          * periodic schedule support
1606          */
1607         .get_frame_number =     sl811h_get_frame,
1608
1609         /*
1610          * root hub support
1611          */
1612         .hub_status_data =      sl811h_hub_status_data,
1613         .hub_control =          sl811h_hub_control,
1614         .hub_suspend =          sl811h_hub_suspend,
1615         .hub_resume =           sl811h_hub_resume,
1616 };
1617
1618 /*-------------------------------------------------------------------------*/
1619
1620 static int __init_or_module
1621 sl811h_remove(struct device *dev)
1622 {
1623         struct sl811            *sl811 = dev_get_drvdata(dev);
1624         struct usb_hcd          *hcd = sl811_to_hcd(sl811);
1625         struct platform_device  *pdev;
1626         struct resource         *res;
1627
1628         pdev = container_of(dev, struct platform_device, dev);
1629
1630         if (HCD_IS_RUNNING(hcd->state))
1631                 hcd->state = USB_STATE_QUIESCING;
1632
1633         usb_disconnect(&hcd->self.root_hub);
1634         remove_debug_file(sl811);
1635         sl811h_stop(hcd);
1636
1637         usb_deregister_bus(&hcd->self);
1638
1639         free_irq(hcd->irq, hcd);
1640
1641         iounmap(sl811->data_reg);
1642         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1643         release_mem_region(res->start, 1);
1644
1645         iounmap(sl811->addr_reg);
1646         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1647         release_mem_region(res->start, 1);
1648
1649         usb_put_hcd(hcd);
1650         return 0;
1651 }
1652
1653 #define resource_len(r) (((r)->end - (r)->start) + 1)
1654
1655 static int __init
1656 sl811h_probe(struct device *dev)
1657 {
1658         struct usb_hcd          *hcd;
1659         struct sl811            *sl811;
1660         struct platform_device  *pdev;
1661         struct resource         *addr, *data;
1662         int                     irq;
1663         void __iomem            *addr_reg;
1664         void __iomem            *data_reg;
1665         int                     retval;
1666         u8                      tmp;
1667
1668         /* basic sanity checks first.  board-specific init logic should
1669          * have initialized these three resources and probably board
1670          * specific platform_data.  we don't probe for IRQs, and do only
1671          * minimal sanity checking.
1672          */
1673         pdev = container_of(dev, struct platform_device, dev);
1674         if (pdev->num_resources < 3)
1675                 return -ENODEV;
1676
1677         addr = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1678         data = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1679         irq = platform_get_irq(pdev, 0);
1680         if (!addr || !data || irq < 0)
1681                 return -ENODEV;
1682
1683         /* refuse to confuse usbcore */
1684         if (dev->dma_mask) {
1685                 DBG("no we won't dma\n");
1686                 return -EINVAL;
1687         }
1688
1689         if (!request_mem_region(addr->start, 1, hcd_name)) {
1690                 retval = -EBUSY;
1691                 goto err1;
1692         }
1693         addr_reg = ioremap(addr->start, resource_len(addr));
1694         if (addr_reg == NULL) {
1695                 retval = -ENOMEM;
1696                 goto err2;
1697         }
1698
1699         if (!request_mem_region(data->start, 1, hcd_name)) {
1700                 retval = -EBUSY;
1701                 goto err3;
1702         }
1703         data_reg = ioremap(data->start, resource_len(addr));
1704         if (data_reg == NULL) {
1705                 retval = -ENOMEM;
1706                 goto err4;
1707         }
1708
1709         /* allocate and initialize hcd */
1710         hcd = usb_create_hcd(&sl811h_hc_driver);
1711         if (!hcd) {
1712                 retval = 0;
1713                 goto err5;
1714         }
1715         sl811 = hcd_to_sl811(hcd);
1716         dev_set_drvdata(dev, sl811);
1717
1718         hcd->self.controller = dev;
1719         hcd->self.bus_name = dev->bus_id;
1720         hcd->irq = irq;
1721         hcd->regs = addr_reg;
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         /* sl811s would need a different handler for this irq */
1753 #ifdef  CONFIG_ARM
1754         /* Cypress docs say the IRQ is IRQT_HIGH ... */
1755         set_irq_type(irq, IRQT_RISING);
1756 #endif
1757         retval = request_irq(irq, sl811h_irq, SA_INTERRUPT,
1758                         hcd->driver->description, hcd);
1759         if (retval != 0)
1760                 goto err6;
1761
1762         INFO("%s, irq %d\n", hcd->product_desc, irq);
1763
1764         retval = usb_register_bus(&hcd->self);
1765         if (retval < 0)
1766                 goto err7;
1767
1768         retval = sl811h_start(hcd);
1769         if (retval < 0)
1770                 goto err8;
1771
1772         create_debug_file(sl811);
1773         return 0;
1774
1775  err8:
1776         usb_deregister_bus(&hcd->self);
1777  err7:
1778         free_irq(hcd->irq, hcd);
1779  err6:
1780         usb_put_hcd(hcd);
1781  err5:
1782         iounmap(data_reg);
1783  err4:
1784         release_mem_region(data->start, 1);
1785  err3:
1786         iounmap(addr_reg);
1787  err2:
1788         release_mem_region(addr->start, 1);
1789  err1:
1790         DBG("init error, %d\n", retval);
1791         return retval;
1792 }
1793
1794 #ifdef  CONFIG_PM
1795
1796 /* for this device there's no useful distinction between the controller
1797  * and its root hub, except that the root hub only gets direct PM calls
1798  * when CONFIG_USB_SUSPEND is enabled.
1799  */
1800
1801 static int
1802 sl811h_suspend(struct device *dev, u32 state, u32 phase)
1803 {
1804         struct sl811    *sl811 = dev_get_drvdata(dev);
1805         int             retval = 0;
1806
1807         if (phase != SUSPEND_POWER_DOWN)
1808                 return retval;
1809
1810         if (state <= PM_SUSPEND_MEM)
1811                 retval = sl811h_hub_suspend(sl811_to_hcd(sl811));
1812         else
1813                 port_power(sl811, 0);
1814         if (retval == 0)
1815                 dev->power.power_state = state;
1816         return retval;
1817 }
1818
1819 static int
1820 sl811h_resume(struct device *dev, u32 phase)
1821 {
1822         struct sl811    *sl811 = dev_get_drvdata(dev);
1823
1824         if (phase != RESUME_POWER_ON)
1825                 return 0;
1826
1827         /* with no "check to see if VBUS is still powered" board hook,
1828          * let's assume it'd only be powered to enable remote wakeup.
1829          */
1830         if (dev->power.power_state > PM_SUSPEND_MEM
1831                         || !sl811_to_hcd(sl811)->can_wakeup) {
1832                 sl811->port1 = 0;
1833                 port_power(sl811, 1);
1834                 return 0;
1835         }
1836
1837         dev->power.power_state = PM_SUSPEND_ON;
1838         return sl811h_hub_resume(sl811_to_hcd(sl811));
1839 }
1840
1841 #else
1842
1843 #define sl811h_suspend  NULL
1844 #define sl811h_resume   NULL
1845
1846 #endif
1847
1848
1849 static struct device_driver sl811h_driver = {
1850         .name =         (char *) hcd_name,
1851         .bus =          &platform_bus_type,
1852
1853         .probe =        sl811h_probe,
1854         .remove =       sl811h_remove,
1855
1856         .suspend =      sl811h_suspend,
1857         .resume =       sl811h_resume,
1858 };
1859
1860 /*-------------------------------------------------------------------------*/
1861
1862 static int __init sl811h_init(void)
1863 {
1864         if (usb_disabled())
1865                 return -ENODEV;
1866
1867         INFO("driver %s, %s\n", hcd_name, DRIVER_VERSION);
1868         return driver_register(&sl811h_driver);
1869 }
1870 module_init(sl811h_init);
1871
1872 static void __exit sl811h_cleanup(void)
1873 {
1874         driver_unregister(&sl811h_driver);
1875 }
1876 module_exit(sl811h_cleanup);