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