1 /* 2 * SL811HS HCD (Host Controller Driver) for USB. 3 * 4 * Copyright (C) 2004 Psion Teklogix (for NetBook PRO) 5 * Copyright (C) 2004-2005 David Brownell 6 * 7 * Periodic scheduling is based on Roman's OHCI code 8 * Copyright (C) 1999 Roman Weissgaerber 9 * 10 * The SL811HS controller handles host side USB (like the SL11H, but with 11 * another register set and SOF generation) as well as peripheral side USB 12 * (like the SL811S). This driver version doesn't implement the Gadget API 13 * for the peripheral role; or OTG (that'd need much external circuitry). 14 * 15 * For documentation, see the SL811HS spec and the "SL811HS Embedded Host" 16 * document (providing significant pieces missing from that spec); plus 17 * the SL811S spec if you want peripheral side info. 18 */ 19 20 /* 21 * Status: Passed basic stress testing, works with hubs, mice, keyboards, 22 * and usb-storage. 23 * 24 * TODO: 25 * - usb suspend/resume triggered by sl811 (with USB_SUSPEND) 26 * - various issues noted in the code 27 * - performance work; use both register banks; ... 28 * - use urb->iso_frame_desc[] with ISO transfers 29 */ 30 31 #undef VERBOSE 32 #undef PACKET_TRACE 33 34 #include <linux/module.h> 35 #include <linux/moduleparam.h> 36 #include <linux/kernel.h> 37 #include <linux/delay.h> 38 #include <linux/ioport.h> 39 #include <linux/sched.h> 40 #include <linux/slab.h> 41 #include <linux/errno.h> 42 #include <linux/init.h> 43 #include <linux/timer.h> 44 #include <linux/list.h> 45 #include <linux/interrupt.h> 46 #include <linux/usb.h> 47 #include <linux/usb/sl811.h> 48 #include <linux/usb/hcd.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 #include <asm/unaligned.h> 56 57 #include "sl811.h" 58 59 60 MODULE_DESCRIPTION("SL811HS USB Host Controller Driver"); 61 MODULE_LICENSE("GPL"); 62 MODULE_ALIAS("platform:sl811-hcd"); 63 64 #define DRIVER_VERSION "19 May 2005" 65 66 67 #ifndef DEBUG 68 # define STUB_DEBUG_FILE 69 #endif 70 71 /* for now, use only one transfer register bank */ 72 #undef USE_B 73 74 /* this doesn't understand urb->iso_frame_desc[], but if you had a driver 75 * that just queued one ISO frame per URB then iso transfers "should" work 76 * using the normal urb status fields. 77 */ 78 #define DISABLE_ISO 79 80 // #define QUIRK2 81 #define QUIRK3 82 83 static const char hcd_name[] = "sl811-hcd"; 84 85 /*-------------------------------------------------------------------------*/ 86 87 static void port_power(struct sl811 *sl811, int is_on) 88 { 89 struct usb_hcd *hcd = sl811_to_hcd(sl811); 90 91 /* hub is inactive unless the port is powered */ 92 if (is_on) { 93 if (sl811->port1 & USB_PORT_STAT_POWER) 94 return; 95 96 sl811->port1 = USB_PORT_STAT_POWER; 97 sl811->irq_enable = SL11H_INTMASK_INSRMV; 98 } else { 99 sl811->port1 = 0; 100 sl811->irq_enable = 0; 101 hcd->state = HC_STATE_HALT; 102 } 103 sl811->ctrl1 = 0; 104 sl811_write(sl811, SL11H_IRQ_ENABLE, 0); 105 sl811_write(sl811, SL11H_IRQ_STATUS, ~0); 106 107 if (sl811->board && sl811->board->port_power) { 108 /* switch VBUS, at 500mA unless hub power budget gets set */ 109 DBG("power %s\n", is_on ? "on" : "off"); 110 sl811->board->port_power(hcd->self.controller, is_on); 111 } 112 113 /* reset as thoroughly as we can */ 114 if (sl811->board && sl811->board->reset) 115 sl811->board->reset(hcd->self.controller); 116 else { 117 sl811_write(sl811, SL11H_CTLREG1, SL11H_CTL1MASK_SE0); 118 mdelay(20); 119 } 120 121 sl811_write(sl811, SL11H_IRQ_ENABLE, 0); 122 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); 123 sl811_write(sl811, SL811HS_CTLREG2, SL811HS_CTL2_INIT); 124 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable); 125 126 // if !is_on, put into lowpower mode now 127 } 128 129 /*-------------------------------------------------------------------------*/ 130 131 /* This is a PIO-only HCD. Queueing appends URBs to the endpoint's queue, 132 * and may start I/O. Endpoint queues are scanned during completion irq 133 * handlers (one per packet: ACK, NAK, faults, etc) and urb cancellation. 134 * 135 * Using an external DMA engine to copy a packet at a time could work, 136 * though setup/teardown costs may be too big to make it worthwhile. 137 */ 138 139 /* SETUP starts a new control request. Devices are not allowed to 140 * STALL or NAK these; they must cancel any pending control requests. 141 */ 142 static void setup_packet( 143 struct sl811 *sl811, 144 struct sl811h_ep *ep, 145 struct urb *urb, 146 u8 bank, 147 u8 control 148 ) 149 { 150 u8 addr; 151 u8 len; 152 void __iomem *data_reg; 153 154 addr = SL811HS_PACKET_BUF(bank == 0); 155 len = sizeof(struct usb_ctrlrequest); 156 data_reg = sl811->data_reg; 157 sl811_write_buf(sl811, addr, urb->setup_packet, len); 158 159 /* autoincrementing */ 160 sl811_write(sl811, bank + SL11H_BUFADDRREG, addr); 161 writeb(len, data_reg); 162 writeb(SL_SETUP /* | ep->epnum */, data_reg); 163 writeb(usb_pipedevice(urb->pipe), data_reg); 164 165 /* always OUT/data0 */ ; 166 sl811_write(sl811, bank + SL11H_HOSTCTLREG, 167 control | SL11H_HCTLMASK_OUT); 168 ep->length = 0; 169 PACKET("SETUP qh%p\n", ep); 170 } 171 172 /* STATUS finishes control requests, often after IN or OUT data packets */ 173 static void status_packet( 174 struct sl811 *sl811, 175 struct sl811h_ep *ep, 176 struct urb *urb, 177 u8 bank, 178 u8 control 179 ) 180 { 181 int do_out; 182 void __iomem *data_reg; 183 184 do_out = urb->transfer_buffer_length && usb_pipein(urb->pipe); 185 data_reg = sl811->data_reg; 186 187 /* autoincrementing */ 188 sl811_write(sl811, bank + SL11H_BUFADDRREG, 0); 189 writeb(0, data_reg); 190 writeb((do_out ? SL_OUT : SL_IN) /* | ep->epnum */, data_reg); 191 writeb(usb_pipedevice(urb->pipe), data_reg); 192 193 /* always data1; sometimes IN */ 194 control |= SL11H_HCTLMASK_TOGGLE; 195 if (do_out) 196 control |= SL11H_HCTLMASK_OUT; 197 sl811_write(sl811, bank + SL11H_HOSTCTLREG, control); 198 ep->length = 0; 199 PACKET("STATUS%s/%s qh%p\n", ep->nak_count ? "/retry" : "", 200 do_out ? "out" : "in", ep); 201 } 202 203 /* IN packets can be used with any type of endpoint. here we just 204 * start the transfer, data from the peripheral may arrive later. 205 * urb->iso_frame_desc is currently ignored here... 206 */ 207 static void in_packet( 208 struct sl811 *sl811, 209 struct sl811h_ep *ep, 210 struct urb *urb, 211 u8 bank, 212 u8 control 213 ) 214 { 215 u8 addr; 216 u8 len; 217 void __iomem *data_reg; 218 219 /* avoid losing data on overflow */ 220 len = ep->maxpacket; 221 addr = SL811HS_PACKET_BUF(bank == 0); 222 if (!(control & SL11H_HCTLMASK_ISOCH) 223 && usb_gettoggle(urb->dev, ep->epnum, 0)) 224 control |= SL11H_HCTLMASK_TOGGLE; 225 data_reg = sl811->data_reg; 226 227 /* autoincrementing */ 228 sl811_write(sl811, bank + SL11H_BUFADDRREG, addr); 229 writeb(len, data_reg); 230 writeb(SL_IN | ep->epnum, data_reg); 231 writeb(usb_pipedevice(urb->pipe), data_reg); 232 233 sl811_write(sl811, bank + SL11H_HOSTCTLREG, control); 234 ep->length = min_t(u32, len, 235 urb->transfer_buffer_length - urb->actual_length); 236 PACKET("IN%s/%d qh%p len%d\n", ep->nak_count ? "/retry" : "", 237 !!usb_gettoggle(urb->dev, ep->epnum, 0), ep, len); 238 } 239 240 /* OUT packets can be used with any type of endpoint. 241 * urb->iso_frame_desc is currently ignored here... 242 */ 243 static void out_packet( 244 struct sl811 *sl811, 245 struct sl811h_ep *ep, 246 struct urb *urb, 247 u8 bank, 248 u8 control 249 ) 250 { 251 void *buf; 252 u8 addr; 253 u8 len; 254 void __iomem *data_reg; 255 256 buf = urb->transfer_buffer + urb->actual_length; 257 prefetch(buf); 258 259 len = min_t(u32, ep->maxpacket, 260 urb->transfer_buffer_length - urb->actual_length); 261 262 if (!(control & SL11H_HCTLMASK_ISOCH) 263 && usb_gettoggle(urb->dev, ep->epnum, 1)) 264 control |= SL11H_HCTLMASK_TOGGLE; 265 addr = SL811HS_PACKET_BUF(bank == 0); 266 data_reg = sl811->data_reg; 267 268 sl811_write_buf(sl811, addr, buf, len); 269 270 /* autoincrementing */ 271 sl811_write(sl811, bank + SL11H_BUFADDRREG, addr); 272 writeb(len, data_reg); 273 writeb(SL_OUT | ep->epnum, data_reg); 274 writeb(usb_pipedevice(urb->pipe), data_reg); 275 276 sl811_write(sl811, bank + SL11H_HOSTCTLREG, 277 control | SL11H_HCTLMASK_OUT); 278 ep->length = len; 279 PACKET("OUT%s/%d qh%p len%d\n", ep->nak_count ? "/retry" : "", 280 !!usb_gettoggle(urb->dev, ep->epnum, 1), ep, len); 281 } 282 283 /*-------------------------------------------------------------------------*/ 284 285 /* caller updates on-chip enables later */ 286 287 static inline void sofirq_on(struct sl811 *sl811) 288 { 289 if (sl811->irq_enable & SL11H_INTMASK_SOFINTR) 290 return; 291 VDBG("sof irq on\n"); 292 sl811->irq_enable |= SL11H_INTMASK_SOFINTR; 293 } 294 295 static inline void sofirq_off(struct sl811 *sl811) 296 { 297 if (!(sl811->irq_enable & SL11H_INTMASK_SOFINTR)) 298 return; 299 VDBG("sof irq off\n"); 300 sl811->irq_enable &= ~SL11H_INTMASK_SOFINTR; 301 } 302 303 /*-------------------------------------------------------------------------*/ 304 305 /* pick the next endpoint for a transaction, and issue it. 306 * frames start with periodic transfers (after whatever is pending 307 * from the previous frame), and the rest of the time is async 308 * transfers, scheduled round-robin. 309 */ 310 static struct sl811h_ep *start(struct sl811 *sl811, u8 bank) 311 { 312 struct sl811h_ep *ep; 313 struct urb *urb; 314 int fclock; 315 u8 control; 316 317 /* use endpoint at schedule head */ 318 if (sl811->next_periodic) { 319 ep = sl811->next_periodic; 320 sl811->next_periodic = ep->next; 321 } else { 322 if (sl811->next_async) 323 ep = sl811->next_async; 324 else if (!list_empty(&sl811->async)) 325 ep = container_of(sl811->async.next, 326 struct sl811h_ep, schedule); 327 else { 328 /* could set up the first fullspeed periodic 329 * transfer for the next frame ... 330 */ 331 return NULL; 332 } 333 334 #ifdef USE_B 335 if ((bank && sl811->active_b == ep) || sl811->active_a == ep) 336 return NULL; 337 #endif 338 339 if (ep->schedule.next == &sl811->async) 340 sl811->next_async = NULL; 341 else 342 sl811->next_async = container_of(ep->schedule.next, 343 struct sl811h_ep, schedule); 344 } 345 346 if (unlikely(list_empty(&ep->hep->urb_list))) { 347 DBG("empty %p queue?\n", ep); 348 return NULL; 349 } 350 351 urb = container_of(ep->hep->urb_list.next, struct urb, urb_list); 352 control = ep->defctrl; 353 354 /* if this frame doesn't have enough time left to transfer this 355 * packet, wait till the next frame. too-simple algorithm... 356 */ 357 fclock = sl811_read(sl811, SL11H_SOFTMRREG) << 6; 358 fclock -= 100; /* setup takes not much time */ 359 if (urb->dev->speed == USB_SPEED_LOW) { 360 if (control & SL11H_HCTLMASK_PREAMBLE) { 361 /* also note erratum 1: some hubs won't work */ 362 fclock -= 800; 363 } 364 fclock -= ep->maxpacket << 8; 365 366 /* erratum 2: AFTERSOF only works for fullspeed */ 367 if (fclock < 0) { 368 if (ep->period) 369 sl811->stat_overrun++; 370 sofirq_on(sl811); 371 return NULL; 372 } 373 } else { 374 fclock -= 12000 / 19; /* 19 64byte packets/msec */ 375 if (fclock < 0) { 376 if (ep->period) 377 sl811->stat_overrun++; 378 control |= SL11H_HCTLMASK_AFTERSOF; 379 380 /* throttle bulk/control irq noise */ 381 } else if (ep->nak_count) 382 control |= SL11H_HCTLMASK_AFTERSOF; 383 } 384 385 386 switch (ep->nextpid) { 387 case USB_PID_IN: 388 in_packet(sl811, ep, urb, bank, control); 389 break; 390 case USB_PID_OUT: 391 out_packet(sl811, ep, urb, bank, control); 392 break; 393 case USB_PID_SETUP: 394 setup_packet(sl811, ep, urb, bank, control); 395 break; 396 case USB_PID_ACK: /* for control status */ 397 status_packet(sl811, ep, urb, bank, control); 398 break; 399 default: 400 DBG("bad ep%p pid %02x\n", ep, ep->nextpid); 401 ep = NULL; 402 } 403 return ep; 404 } 405 406 #define MIN_JIFFIES ((msecs_to_jiffies(2) > 1) ? msecs_to_jiffies(2) : 2) 407 408 static inline void start_transfer(struct sl811 *sl811) 409 { 410 if (sl811->port1 & USB_PORT_STAT_SUSPEND) 411 return; 412 if (sl811->active_a == NULL) { 413 sl811->active_a = start(sl811, SL811_EP_A(SL811_HOST_BUF)); 414 if (sl811->active_a != NULL) 415 sl811->jiffies_a = jiffies + MIN_JIFFIES; 416 } 417 #ifdef USE_B 418 if (sl811->active_b == NULL) { 419 sl811->active_b = start(sl811, SL811_EP_B(SL811_HOST_BUF)); 420 if (sl811->active_b != NULL) 421 sl811->jiffies_b = jiffies + MIN_JIFFIES; 422 } 423 #endif 424 } 425 426 static void finish_request( 427 struct sl811 *sl811, 428 struct sl811h_ep *ep, 429 struct urb *urb, 430 int status 431 ) __releases(sl811->lock) __acquires(sl811->lock) 432 { 433 unsigned i; 434 435 if (usb_pipecontrol(urb->pipe)) 436 ep->nextpid = USB_PID_SETUP; 437 438 usb_hcd_unlink_urb_from_ep(sl811_to_hcd(sl811), urb); 439 spin_unlock(&sl811->lock); 440 usb_hcd_giveback_urb(sl811_to_hcd(sl811), urb, status); 441 spin_lock(&sl811->lock); 442 443 /* leave active endpoints in the schedule */ 444 if (!list_empty(&ep->hep->urb_list)) 445 return; 446 447 /* async deschedule? */ 448 if (!list_empty(&ep->schedule)) { 449 list_del_init(&ep->schedule); 450 if (ep == sl811->next_async) 451 sl811->next_async = NULL; 452 return; 453 } 454 455 /* periodic deschedule */ 456 DBG("deschedule qh%d/%p branch %d\n", ep->period, ep, ep->branch); 457 for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) { 458 struct sl811h_ep *temp; 459 struct sl811h_ep **prev = &sl811->periodic[i]; 460 461 while (*prev && ((temp = *prev) != ep)) 462 prev = &temp->next; 463 if (*prev) 464 *prev = ep->next; 465 sl811->load[i] -= ep->load; 466 } 467 ep->branch = PERIODIC_SIZE; 468 sl811->periodic_count--; 469 sl811_to_hcd(sl811)->self.bandwidth_allocated 470 -= ep->load / ep->period; 471 if (ep == sl811->next_periodic) 472 sl811->next_periodic = ep->next; 473 474 /* we might turn SOFs back on again for the async schedule */ 475 if (sl811->periodic_count == 0) 476 sofirq_off(sl811); 477 } 478 479 static void 480 done(struct sl811 *sl811, struct sl811h_ep *ep, u8 bank) 481 { 482 u8 status; 483 struct urb *urb; 484 int urbstat = -EINPROGRESS; 485 486 if (unlikely(!ep)) 487 return; 488 489 status = sl811_read(sl811, bank + SL11H_PKTSTATREG); 490 491 urb = container_of(ep->hep->urb_list.next, struct urb, urb_list); 492 493 /* we can safely ignore NAKs */ 494 if (status & SL11H_STATMASK_NAK) { 495 // PACKET("...NAK_%02x qh%p\n", bank, ep); 496 if (!ep->period) 497 ep->nak_count++; 498 ep->error_count = 0; 499 500 /* ACK advances transfer, toggle, and maybe queue */ 501 } else if (status & SL11H_STATMASK_ACK) { 502 struct usb_device *udev = urb->dev; 503 int len; 504 unsigned char *buf; 505 506 /* urb->iso_frame_desc is currently ignored here... */ 507 508 ep->nak_count = ep->error_count = 0; 509 switch (ep->nextpid) { 510 case USB_PID_OUT: 511 // PACKET("...ACK/out_%02x qh%p\n", bank, ep); 512 urb->actual_length += ep->length; 513 usb_dotoggle(udev, ep->epnum, 1); 514 if (urb->actual_length 515 == urb->transfer_buffer_length) { 516 if (usb_pipecontrol(urb->pipe)) 517 ep->nextpid = USB_PID_ACK; 518 519 /* some bulk protocols terminate OUT transfers 520 * by a short packet, using ZLPs not padding. 521 */ 522 else if (ep->length < ep->maxpacket 523 || !(urb->transfer_flags 524 & URB_ZERO_PACKET)) 525 urbstat = 0; 526 } 527 break; 528 case USB_PID_IN: 529 // PACKET("...ACK/in_%02x qh%p\n", bank, ep); 530 buf = urb->transfer_buffer + urb->actual_length; 531 prefetchw(buf); 532 len = ep->maxpacket - sl811_read(sl811, 533 bank + SL11H_XFERCNTREG); 534 if (len > ep->length) { 535 len = ep->length; 536 urbstat = -EOVERFLOW; 537 } 538 urb->actual_length += len; 539 sl811_read_buf(sl811, SL811HS_PACKET_BUF(bank == 0), 540 buf, len); 541 usb_dotoggle(udev, ep->epnum, 0); 542 if (urbstat == -EINPROGRESS && 543 (len < ep->maxpacket || 544 urb->actual_length == 545 urb->transfer_buffer_length)) { 546 if (usb_pipecontrol(urb->pipe)) 547 ep->nextpid = USB_PID_ACK; 548 else 549 urbstat = 0; 550 } 551 break; 552 case USB_PID_SETUP: 553 // PACKET("...ACK/setup_%02x qh%p\n", bank, ep); 554 if (urb->transfer_buffer_length == urb->actual_length) 555 ep->nextpid = USB_PID_ACK; 556 else if (usb_pipeout(urb->pipe)) { 557 usb_settoggle(udev, 0, 1, 1); 558 ep->nextpid = USB_PID_OUT; 559 } else { 560 usb_settoggle(udev, 0, 0, 1); 561 ep->nextpid = USB_PID_IN; 562 } 563 break; 564 case USB_PID_ACK: 565 // PACKET("...ACK/status_%02x qh%p\n", bank, ep); 566 urbstat = 0; 567 break; 568 } 569 570 /* STALL stops all transfers */ 571 } else if (status & SL11H_STATMASK_STALL) { 572 PACKET("...STALL_%02x qh%p\n", bank, ep); 573 ep->nak_count = ep->error_count = 0; 574 urbstat = -EPIPE; 575 576 /* error? retry, until "3 strikes" */ 577 } else if (++ep->error_count >= 3) { 578 if (status & SL11H_STATMASK_TMOUT) 579 urbstat = -ETIME; 580 else if (status & SL11H_STATMASK_OVF) 581 urbstat = -EOVERFLOW; 582 else 583 urbstat = -EPROTO; 584 ep->error_count = 0; 585 PACKET("...3STRIKES_%02x %02x qh%p stat %d\n", 586 bank, status, ep, urbstat); 587 } 588 589 if (urbstat != -EINPROGRESS || urb->unlinked) 590 finish_request(sl811, ep, urb, urbstat); 591 } 592 593 static inline u8 checkdone(struct sl811 *sl811) 594 { 595 u8 ctl; 596 u8 irqstat = 0; 597 598 if (sl811->active_a && time_before_eq(sl811->jiffies_a, jiffies)) { 599 ctl = sl811_read(sl811, SL811_EP_A(SL11H_HOSTCTLREG)); 600 if (ctl & SL11H_HCTLMASK_ARM) 601 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0); 602 DBG("%s DONE_A: ctrl %02x sts %02x\n", 603 (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost", 604 ctl, 605 sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG))); 606 irqstat |= SL11H_INTMASK_DONE_A; 607 } 608 #ifdef USE_B 609 if (sl811->active_b && time_before_eq(sl811->jiffies_b, jiffies)) { 610 ctl = sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG)); 611 if (ctl & SL11H_HCTLMASK_ARM) 612 sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0); 613 DBG("%s DONE_B: ctrl %02x sts %02x\n", 614 (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost", 615 ctl, 616 sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG))); 617 irqstat |= SL11H_INTMASK_DONE_A; 618 } 619 #endif 620 return irqstat; 621 } 622 623 static irqreturn_t sl811h_irq(struct usb_hcd *hcd) 624 { 625 struct sl811 *sl811 = hcd_to_sl811(hcd); 626 u8 irqstat; 627 irqreturn_t ret = IRQ_NONE; 628 unsigned retries = 5; 629 630 spin_lock(&sl811->lock); 631 632 retry: 633 irqstat = sl811_read(sl811, SL11H_IRQ_STATUS) & ~SL11H_INTMASK_DP; 634 if (irqstat) { 635 sl811_write(sl811, SL11H_IRQ_STATUS, irqstat); 636 irqstat &= sl811->irq_enable; 637 } 638 639 #ifdef QUIRK2 640 /* this may no longer be necessary ... */ 641 if (irqstat == 0) { 642 irqstat = checkdone(sl811); 643 if (irqstat) 644 sl811->stat_lost++; 645 } 646 #endif 647 648 /* USB packets, not necessarily handled in the order they're 649 * issued ... that's fine if they're different endpoints. 650 */ 651 if (irqstat & SL11H_INTMASK_DONE_A) { 652 done(sl811, sl811->active_a, SL811_EP_A(SL811_HOST_BUF)); 653 sl811->active_a = NULL; 654 sl811->stat_a++; 655 } 656 #ifdef USE_B 657 if (irqstat & SL11H_INTMASK_DONE_B) { 658 done(sl811, sl811->active_b, SL811_EP_B(SL811_HOST_BUF)); 659 sl811->active_b = NULL; 660 sl811->stat_b++; 661 } 662 #endif 663 if (irqstat & SL11H_INTMASK_SOFINTR) { 664 unsigned index; 665 666 index = sl811->frame++ % (PERIODIC_SIZE - 1); 667 sl811->stat_sof++; 668 669 /* be graceful about almost-inevitable periodic schedule 670 * overruns: continue the previous frame's transfers iff 671 * this one has nothing scheduled. 672 */ 673 if (sl811->next_periodic) { 674 // ERR("overrun to slot %d\n", index); 675 sl811->stat_overrun++; 676 } 677 if (sl811->periodic[index]) 678 sl811->next_periodic = sl811->periodic[index]; 679 } 680 681 /* khubd manages debouncing and wakeup */ 682 if (irqstat & SL11H_INTMASK_INSRMV) { 683 sl811->stat_insrmv++; 684 685 /* most stats are reset for each VBUS session */ 686 sl811->stat_wake = 0; 687 sl811->stat_sof = 0; 688 sl811->stat_a = 0; 689 sl811->stat_b = 0; 690 sl811->stat_lost = 0; 691 692 sl811->ctrl1 = 0; 693 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); 694 695 sl811->irq_enable = SL11H_INTMASK_INSRMV; 696 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable); 697 698 /* usbcore nukes other pending transactions on disconnect */ 699 if (sl811->active_a) { 700 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0); 701 finish_request(sl811, sl811->active_a, 702 container_of(sl811->active_a 703 ->hep->urb_list.next, 704 struct urb, urb_list), 705 -ESHUTDOWN); 706 sl811->active_a = NULL; 707 } 708 #ifdef USE_B 709 if (sl811->active_b) { 710 sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0); 711 finish_request(sl811, sl811->active_b, 712 container_of(sl811->active_b 713 ->hep->urb_list.next, 714 struct urb, urb_list), 715 NULL, -ESHUTDOWN); 716 sl811->active_b = NULL; 717 } 718 #endif 719 720 /* port status seems weird until after reset, so 721 * force the reset and make khubd clean up later. 722 */ 723 if (irqstat & SL11H_INTMASK_RD) 724 sl811->port1 &= ~USB_PORT_STAT_CONNECTION; 725 else 726 sl811->port1 |= USB_PORT_STAT_CONNECTION; 727 728 sl811->port1 |= USB_PORT_STAT_C_CONNECTION << 16; 729 730 } else if (irqstat & SL11H_INTMASK_RD) { 731 if (sl811->port1 & USB_PORT_STAT_SUSPEND) { 732 DBG("wakeup\n"); 733 sl811->port1 |= USB_PORT_STAT_C_SUSPEND << 16; 734 sl811->stat_wake++; 735 } else 736 irqstat &= ~SL11H_INTMASK_RD; 737 } 738 739 if (irqstat) { 740 if (sl811->port1 & USB_PORT_STAT_ENABLE) 741 start_transfer(sl811); 742 ret = IRQ_HANDLED; 743 if (retries--) 744 goto retry; 745 } 746 747 if (sl811->periodic_count == 0 && list_empty(&sl811->async)) 748 sofirq_off(sl811); 749 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable); 750 751 spin_unlock(&sl811->lock); 752 753 return ret; 754 } 755 756 /*-------------------------------------------------------------------------*/ 757 758 /* usb 1.1 says max 90% of a frame is available for periodic transfers. 759 * this driver doesn't promise that much since it's got to handle an 760 * IRQ per packet; irq handling latencies also use up that time. 761 * 762 * NOTE: the periodic schedule is a sparse tree, with the load for 763 * each branch minimized. see fig 3.5 in the OHCI spec for example. 764 */ 765 #define MAX_PERIODIC_LOAD 500 /* out of 1000 usec */ 766 767 static int balance(struct sl811 *sl811, u16 period, u16 load) 768 { 769 int i, branch = -ENOSPC; 770 771 /* search for the least loaded schedule branch of that period 772 * which has enough bandwidth left unreserved. 773 */ 774 for (i = 0; i < period ; i++) { 775 if (branch < 0 || sl811->load[branch] > sl811->load[i]) { 776 int j; 777 778 for (j = i; j < PERIODIC_SIZE; j += period) { 779 if ((sl811->load[j] + load) 780 > MAX_PERIODIC_LOAD) 781 break; 782 } 783 if (j < PERIODIC_SIZE) 784 continue; 785 branch = i; 786 } 787 } 788 return branch; 789 } 790 791 /*-------------------------------------------------------------------------*/ 792 793 static int sl811h_urb_enqueue( 794 struct usb_hcd *hcd, 795 struct urb *urb, 796 gfp_t mem_flags 797 ) { 798 struct sl811 *sl811 = hcd_to_sl811(hcd); 799 struct usb_device *udev = urb->dev; 800 unsigned int pipe = urb->pipe; 801 int is_out = !usb_pipein(pipe); 802 int type = usb_pipetype(pipe); 803 int epnum = usb_pipeendpoint(pipe); 804 struct sl811h_ep *ep = NULL; 805 unsigned long flags; 806 int i; 807 int retval; 808 struct usb_host_endpoint *hep = urb->ep; 809 810 #ifdef DISABLE_ISO 811 if (type == PIPE_ISOCHRONOUS) 812 return -ENOSPC; 813 #endif 814 815 /* avoid all allocations within spinlocks */ 816 if (!hep->hcpriv) 817 ep = kzalloc(sizeof *ep, mem_flags); 818 819 spin_lock_irqsave(&sl811->lock, flags); 820 821 /* don't submit to a dead or disabled port */ 822 if (!(sl811->port1 & USB_PORT_STAT_ENABLE) 823 || !HC_IS_RUNNING(hcd->state)) { 824 retval = -ENODEV; 825 kfree(ep); 826 goto fail_not_linked; 827 } 828 retval = usb_hcd_link_urb_to_ep(hcd, urb); 829 if (retval) { 830 kfree(ep); 831 goto fail_not_linked; 832 } 833 834 if (hep->hcpriv) { 835 kfree(ep); 836 ep = hep->hcpriv; 837 } else if (!ep) { 838 retval = -ENOMEM; 839 goto fail; 840 841 } else { 842 INIT_LIST_HEAD(&ep->schedule); 843 ep->udev = udev; 844 ep->epnum = epnum; 845 ep->maxpacket = usb_maxpacket(udev, urb->pipe, is_out); 846 ep->defctrl = SL11H_HCTLMASK_ARM | SL11H_HCTLMASK_ENABLE; 847 usb_settoggle(udev, epnum, is_out, 0); 848 849 if (type == PIPE_CONTROL) 850 ep->nextpid = USB_PID_SETUP; 851 else if (is_out) 852 ep->nextpid = USB_PID_OUT; 853 else 854 ep->nextpid = USB_PID_IN; 855 856 if (ep->maxpacket > H_MAXPACKET) { 857 /* iso packets up to 240 bytes could work... */ 858 DBG("dev %d ep%d maxpacket %d\n", 859 udev->devnum, epnum, ep->maxpacket); 860 retval = -EINVAL; 861 goto fail; 862 } 863 864 if (udev->speed == USB_SPEED_LOW) { 865 /* send preamble for external hub? */ 866 if (!(sl811->ctrl1 & SL11H_CTL1MASK_LSPD)) 867 ep->defctrl |= SL11H_HCTLMASK_PREAMBLE; 868 } 869 switch (type) { 870 case PIPE_ISOCHRONOUS: 871 case PIPE_INTERRUPT: 872 if (urb->interval > PERIODIC_SIZE) 873 urb->interval = PERIODIC_SIZE; 874 ep->period = urb->interval; 875 ep->branch = PERIODIC_SIZE; 876 if (type == PIPE_ISOCHRONOUS) 877 ep->defctrl |= SL11H_HCTLMASK_ISOCH; 878 ep->load = usb_calc_bus_time(udev->speed, !is_out, 879 (type == PIPE_ISOCHRONOUS), 880 usb_maxpacket(udev, pipe, is_out)) 881 / 1000; 882 break; 883 } 884 885 ep->hep = hep; 886 hep->hcpriv = ep; 887 } 888 889 /* maybe put endpoint into schedule */ 890 switch (type) { 891 case PIPE_CONTROL: 892 case PIPE_BULK: 893 if (list_empty(&ep->schedule)) 894 list_add_tail(&ep->schedule, &sl811->async); 895 break; 896 case PIPE_ISOCHRONOUS: 897 case PIPE_INTERRUPT: 898 urb->interval = ep->period; 899 if (ep->branch < PERIODIC_SIZE) { 900 /* NOTE: the phase is correct here, but the value 901 * needs offsetting by the transfer queue depth. 902 * All current drivers ignore start_frame, so this 903 * is unlikely to ever matter... 904 */ 905 urb->start_frame = (sl811->frame & (PERIODIC_SIZE - 1)) 906 + ep->branch; 907 break; 908 } 909 910 retval = balance(sl811, ep->period, ep->load); 911 if (retval < 0) 912 goto fail; 913 ep->branch = retval; 914 retval = 0; 915 urb->start_frame = (sl811->frame & (PERIODIC_SIZE - 1)) 916 + ep->branch; 917 918 /* sort each schedule branch by period (slow before fast) 919 * to share the faster parts of the tree without needing 920 * dummy/placeholder nodes 921 */ 922 DBG("schedule qh%d/%p branch %d\n", ep->period, ep, ep->branch); 923 for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) { 924 struct sl811h_ep **prev = &sl811->periodic[i]; 925 struct sl811h_ep *here = *prev; 926 927 while (here && ep != here) { 928 if (ep->period > here->period) 929 break; 930 prev = &here->next; 931 here = *prev; 932 } 933 if (ep != here) { 934 ep->next = here; 935 *prev = ep; 936 } 937 sl811->load[i] += ep->load; 938 } 939 sl811->periodic_count++; 940 hcd->self.bandwidth_allocated += ep->load / ep->period; 941 sofirq_on(sl811); 942 } 943 944 urb->hcpriv = hep; 945 start_transfer(sl811); 946 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable); 947 fail: 948 if (retval) 949 usb_hcd_unlink_urb_from_ep(hcd, urb); 950 fail_not_linked: 951 spin_unlock_irqrestore(&sl811->lock, flags); 952 return retval; 953 } 954 955 static int sl811h_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) 956 { 957 struct sl811 *sl811 = hcd_to_sl811(hcd); 958 struct usb_host_endpoint *hep; 959 unsigned long flags; 960 struct sl811h_ep *ep; 961 int retval; 962 963 spin_lock_irqsave(&sl811->lock, flags); 964 retval = usb_hcd_check_unlink_urb(hcd, urb, status); 965 if (retval) 966 goto fail; 967 968 hep = urb->hcpriv; 969 ep = hep->hcpriv; 970 if (ep) { 971 /* finish right away if this urb can't be active ... 972 * note that some drivers wrongly expect delays 973 */ 974 if (ep->hep->urb_list.next != &urb->urb_list) { 975 /* not front of queue? never active */ 976 977 /* for active transfers, we expect an IRQ */ 978 } else if (sl811->active_a == ep) { 979 if (time_before_eq(sl811->jiffies_a, jiffies)) { 980 /* happens a lot with lowspeed?? */ 981 DBG("giveup on DONE_A: ctrl %02x sts %02x\n", 982 sl811_read(sl811, 983 SL811_EP_A(SL11H_HOSTCTLREG)), 984 sl811_read(sl811, 985 SL811_EP_A(SL11H_PKTSTATREG))); 986 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 987 0); 988 sl811->active_a = NULL; 989 } else 990 urb = NULL; 991 #ifdef USE_B 992 } else if (sl811->active_b == ep) { 993 if (time_before_eq(sl811->jiffies_a, jiffies)) { 994 /* happens a lot with lowspeed?? */ 995 DBG("giveup on DONE_B: ctrl %02x sts %02x\n", 996 sl811_read(sl811, 997 SL811_EP_B(SL11H_HOSTCTLREG)), 998 sl811_read(sl811, 999 SL811_EP_B(SL11H_PKTSTATREG))); 1000 sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 1001 0); 1002 sl811->active_b = NULL; 1003 } else 1004 urb = NULL; 1005 #endif 1006 } else { 1007 /* front of queue for inactive endpoint */ 1008 } 1009 1010 if (urb) 1011 finish_request(sl811, ep, urb, 0); 1012 else 1013 VDBG("dequeue, urb %p active %s; wait4irq\n", urb, 1014 (sl811->active_a == ep) ? "A" : "B"); 1015 } else 1016 retval = -EINVAL; 1017 fail: 1018 spin_unlock_irqrestore(&sl811->lock, flags); 1019 return retval; 1020 } 1021 1022 static void 1023 sl811h_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *hep) 1024 { 1025 struct sl811h_ep *ep = hep->hcpriv; 1026 1027 if (!ep) 1028 return; 1029 1030 /* assume we'd just wait for the irq */ 1031 if (!list_empty(&hep->urb_list)) 1032 msleep(3); 1033 if (!list_empty(&hep->urb_list)) 1034 WARNING("ep %p not empty?\n", ep); 1035 1036 kfree(ep); 1037 hep->hcpriv = NULL; 1038 } 1039 1040 static int 1041 sl811h_get_frame(struct usb_hcd *hcd) 1042 { 1043 struct sl811 *sl811 = hcd_to_sl811(hcd); 1044 1045 /* wrong except while periodic transfers are scheduled; 1046 * never matches the on-the-wire frame; 1047 * subject to overruns. 1048 */ 1049 return sl811->frame; 1050 } 1051 1052 1053 /*-------------------------------------------------------------------------*/ 1054 1055 /* the virtual root hub timer IRQ checks for hub status */ 1056 static int 1057 sl811h_hub_status_data(struct usb_hcd *hcd, char *buf) 1058 { 1059 struct sl811 *sl811 = hcd_to_sl811(hcd); 1060 #ifdef QUIRK3 1061 unsigned long flags; 1062 1063 /* non-SMP HACK: use root hub timer as i/o watchdog 1064 * this seems essential when SOF IRQs aren't in use... 1065 */ 1066 local_irq_save(flags); 1067 if (!timer_pending(&sl811->timer)) { 1068 if (sl811h_irq( /* ~0, */ hcd) != IRQ_NONE) 1069 sl811->stat_lost++; 1070 } 1071 local_irq_restore(flags); 1072 #endif 1073 1074 if (!(sl811->port1 & (0xffff << 16))) 1075 return 0; 1076 1077 /* tell khubd port 1 changed */ 1078 *buf = (1 << 1); 1079 return 1; 1080 } 1081 1082 static void 1083 sl811h_hub_descriptor ( 1084 struct sl811 *sl811, 1085 struct usb_hub_descriptor *desc 1086 ) { 1087 u16 temp = 0; 1088 1089 desc->bDescriptorType = 0x29; 1090 desc->bHubContrCurrent = 0; 1091 1092 desc->bNbrPorts = 1; 1093 desc->bDescLength = 9; 1094 1095 /* per-port power switching (gang of one!), or none */ 1096 desc->bPwrOn2PwrGood = 0; 1097 if (sl811->board && sl811->board->port_power) { 1098 desc->bPwrOn2PwrGood = sl811->board->potpg; 1099 if (!desc->bPwrOn2PwrGood) 1100 desc->bPwrOn2PwrGood = 10; 1101 temp = 0x0001; 1102 } else 1103 temp = 0x0002; 1104 1105 /* no overcurrent errors detection/handling */ 1106 temp |= 0x0010; 1107 1108 desc->wHubCharacteristics = cpu_to_le16(temp); 1109 1110 /* two bitmaps: ports removable, and legacy PortPwrCtrlMask */ 1111 desc->bitmap[0] = 0 << 1; 1112 desc->bitmap[1] = ~0; 1113 } 1114 1115 static void 1116 sl811h_timer(unsigned long _sl811) 1117 { 1118 struct sl811 *sl811 = (void *) _sl811; 1119 unsigned long flags; 1120 u8 irqstat; 1121 u8 signaling = sl811->ctrl1 & SL11H_CTL1MASK_FORCE; 1122 const u32 mask = USB_PORT_STAT_CONNECTION 1123 | USB_PORT_STAT_ENABLE 1124 | USB_PORT_STAT_LOW_SPEED; 1125 1126 spin_lock_irqsave(&sl811->lock, flags); 1127 1128 /* stop special signaling */ 1129 sl811->ctrl1 &= ~SL11H_CTL1MASK_FORCE; 1130 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); 1131 udelay(3); 1132 1133 irqstat = sl811_read(sl811, SL11H_IRQ_STATUS); 1134 1135 switch (signaling) { 1136 case SL11H_CTL1MASK_SE0: 1137 DBG("end reset\n"); 1138 sl811->port1 = (USB_PORT_STAT_C_RESET << 16) 1139 | USB_PORT_STAT_POWER; 1140 sl811->ctrl1 = 0; 1141 /* don't wrongly ack RD */ 1142 if (irqstat & SL11H_INTMASK_INSRMV) 1143 irqstat &= ~SL11H_INTMASK_RD; 1144 break; 1145 case SL11H_CTL1MASK_K: 1146 DBG("end resume\n"); 1147 sl811->port1 &= ~USB_PORT_STAT_SUSPEND; 1148 break; 1149 default: 1150 DBG("odd timer signaling: %02x\n", signaling); 1151 break; 1152 } 1153 sl811_write(sl811, SL11H_IRQ_STATUS, irqstat); 1154 1155 if (irqstat & SL11H_INTMASK_RD) { 1156 /* usbcore nukes all pending transactions on disconnect */ 1157 if (sl811->port1 & USB_PORT_STAT_CONNECTION) 1158 sl811->port1 |= (USB_PORT_STAT_C_CONNECTION << 16) 1159 | (USB_PORT_STAT_C_ENABLE << 16); 1160 sl811->port1 &= ~mask; 1161 sl811->irq_enable = SL11H_INTMASK_INSRMV; 1162 } else { 1163 sl811->port1 |= mask; 1164 if (irqstat & SL11H_INTMASK_DP) 1165 sl811->port1 &= ~USB_PORT_STAT_LOW_SPEED; 1166 sl811->irq_enable = SL11H_INTMASK_INSRMV | SL11H_INTMASK_RD; 1167 } 1168 1169 if (sl811->port1 & USB_PORT_STAT_CONNECTION) { 1170 u8 ctrl2 = SL811HS_CTL2_INIT; 1171 1172 sl811->irq_enable |= SL11H_INTMASK_DONE_A; 1173 #ifdef USE_B 1174 sl811->irq_enable |= SL11H_INTMASK_DONE_B; 1175 #endif 1176 if (sl811->port1 & USB_PORT_STAT_LOW_SPEED) { 1177 sl811->ctrl1 |= SL11H_CTL1MASK_LSPD; 1178 ctrl2 |= SL811HS_CTL2MASK_DSWAP; 1179 } 1180 1181 /* start SOFs flowing, kickstarting with A registers */ 1182 sl811->ctrl1 |= SL11H_CTL1MASK_SOF_ENA; 1183 sl811_write(sl811, SL11H_SOFLOWREG, 0xe0); 1184 sl811_write(sl811, SL811HS_CTLREG2, ctrl2); 1185 1186 /* autoincrementing */ 1187 sl811_write(sl811, SL811_EP_A(SL11H_BUFLNTHREG), 0); 1188 writeb(SL_SOF, sl811->data_reg); 1189 writeb(0, sl811->data_reg); 1190 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 1191 SL11H_HCTLMASK_ARM); 1192 1193 /* khubd provides debounce delay */ 1194 } else { 1195 sl811->ctrl1 = 0; 1196 } 1197 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); 1198 1199 /* reenable irqs */ 1200 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable); 1201 spin_unlock_irqrestore(&sl811->lock, flags); 1202 } 1203 1204 static int 1205 sl811h_hub_control( 1206 struct usb_hcd *hcd, 1207 u16 typeReq, 1208 u16 wValue, 1209 u16 wIndex, 1210 char *buf, 1211 u16 wLength 1212 ) { 1213 struct sl811 *sl811 = hcd_to_sl811(hcd); 1214 int retval = 0; 1215 unsigned long flags; 1216 1217 spin_lock_irqsave(&sl811->lock, flags); 1218 1219 switch (typeReq) { 1220 case ClearHubFeature: 1221 case SetHubFeature: 1222 switch (wValue) { 1223 case C_HUB_OVER_CURRENT: 1224 case C_HUB_LOCAL_POWER: 1225 break; 1226 default: 1227 goto error; 1228 } 1229 break; 1230 case ClearPortFeature: 1231 if (wIndex != 1 || wLength != 0) 1232 goto error; 1233 1234 switch (wValue) { 1235 case USB_PORT_FEAT_ENABLE: 1236 sl811->port1 &= USB_PORT_STAT_POWER; 1237 sl811->ctrl1 = 0; 1238 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); 1239 sl811->irq_enable = SL11H_INTMASK_INSRMV; 1240 sl811_write(sl811, SL11H_IRQ_ENABLE, 1241 sl811->irq_enable); 1242 break; 1243 case USB_PORT_FEAT_SUSPEND: 1244 if (!(sl811->port1 & USB_PORT_STAT_SUSPEND)) 1245 break; 1246 1247 /* 20 msec of resume/K signaling, other irqs blocked */ 1248 DBG("start resume...\n"); 1249 sl811->irq_enable = 0; 1250 sl811_write(sl811, SL11H_IRQ_ENABLE, 1251 sl811->irq_enable); 1252 sl811->ctrl1 |= SL11H_CTL1MASK_K; 1253 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); 1254 1255 mod_timer(&sl811->timer, jiffies 1256 + msecs_to_jiffies(20)); 1257 break; 1258 case USB_PORT_FEAT_POWER: 1259 port_power(sl811, 0); 1260 break; 1261 case USB_PORT_FEAT_C_ENABLE: 1262 case USB_PORT_FEAT_C_SUSPEND: 1263 case USB_PORT_FEAT_C_CONNECTION: 1264 case USB_PORT_FEAT_C_OVER_CURRENT: 1265 case USB_PORT_FEAT_C_RESET: 1266 break; 1267 default: 1268 goto error; 1269 } 1270 sl811->port1 &= ~(1 << wValue); 1271 break; 1272 case GetHubDescriptor: 1273 sl811h_hub_descriptor(sl811, (struct usb_hub_descriptor *) buf); 1274 break; 1275 case GetHubStatus: 1276 put_unaligned_le32(0, buf); 1277 break; 1278 case GetPortStatus: 1279 if (wIndex != 1) 1280 goto error; 1281 put_unaligned_le32(sl811->port1, buf); 1282 1283 #ifndef VERBOSE 1284 if (*(u16*)(buf+2)) /* only if wPortChange is interesting */ 1285 #endif 1286 DBG("GetPortStatus %08x\n", sl811->port1); 1287 break; 1288 case SetPortFeature: 1289 if (wIndex != 1 || wLength != 0) 1290 goto error; 1291 switch (wValue) { 1292 case USB_PORT_FEAT_SUSPEND: 1293 if (sl811->port1 & USB_PORT_STAT_RESET) 1294 goto error; 1295 if (!(sl811->port1 & USB_PORT_STAT_ENABLE)) 1296 goto error; 1297 1298 DBG("suspend...\n"); 1299 sl811->ctrl1 &= ~SL11H_CTL1MASK_SOF_ENA; 1300 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); 1301 break; 1302 case USB_PORT_FEAT_POWER: 1303 port_power(sl811, 1); 1304 break; 1305 case USB_PORT_FEAT_RESET: 1306 if (sl811->port1 & USB_PORT_STAT_SUSPEND) 1307 goto error; 1308 if (!(sl811->port1 & USB_PORT_STAT_POWER)) 1309 break; 1310 1311 /* 50 msec of reset/SE0 signaling, irqs blocked */ 1312 sl811->irq_enable = 0; 1313 sl811_write(sl811, SL11H_IRQ_ENABLE, 1314 sl811->irq_enable); 1315 sl811->ctrl1 = SL11H_CTL1MASK_SE0; 1316 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1); 1317 sl811->port1 |= USB_PORT_STAT_RESET; 1318 mod_timer(&sl811->timer, jiffies 1319 + msecs_to_jiffies(50)); 1320 break; 1321 default: 1322 goto error; 1323 } 1324 sl811->port1 |= 1 << wValue; 1325 break; 1326 1327 default: 1328 error: 1329 /* "protocol stall" on error */ 1330 retval = -EPIPE; 1331 } 1332 1333 spin_unlock_irqrestore(&sl811->lock, flags); 1334 return retval; 1335 } 1336 1337 #ifdef CONFIG_PM 1338 1339 static int 1340 sl811h_bus_suspend(struct usb_hcd *hcd) 1341 { 1342 // SOFs off 1343 DBG("%s\n", __func__); 1344 return 0; 1345 } 1346 1347 static int 1348 sl811h_bus_resume(struct usb_hcd *hcd) 1349 { 1350 // SOFs on 1351 DBG("%s\n", __func__); 1352 return 0; 1353 } 1354 1355 #else 1356 1357 #define sl811h_bus_suspend NULL 1358 #define sl811h_bus_resume NULL 1359 1360 #endif 1361 1362 1363 /*-------------------------------------------------------------------------*/ 1364 1365 #ifdef STUB_DEBUG_FILE 1366 1367 static inline void create_debug_file(struct sl811 *sl811) { } 1368 static inline void remove_debug_file(struct sl811 *sl811) { } 1369 1370 #else 1371 1372 #include <linux/proc_fs.h> 1373 #include <linux/seq_file.h> 1374 1375 static void dump_irq(struct seq_file *s, char *label, u8 mask) 1376 { 1377 seq_printf(s, "%s %02x%s%s%s%s%s%s\n", label, mask, 1378 (mask & SL11H_INTMASK_DONE_A) ? " done_a" : "", 1379 (mask & SL11H_INTMASK_DONE_B) ? " done_b" : "", 1380 (mask & SL11H_INTMASK_SOFINTR) ? " sof" : "", 1381 (mask & SL11H_INTMASK_INSRMV) ? " ins/rmv" : "", 1382 (mask & SL11H_INTMASK_RD) ? " rd" : "", 1383 (mask & SL11H_INTMASK_DP) ? " dp" : ""); 1384 } 1385 1386 static int proc_sl811h_show(struct seq_file *s, void *unused) 1387 { 1388 struct sl811 *sl811 = s->private; 1389 struct sl811h_ep *ep; 1390 unsigned i; 1391 1392 seq_printf(s, "%s\n%s version %s\nportstatus[1] = %08x\n", 1393 sl811_to_hcd(sl811)->product_desc, 1394 hcd_name, DRIVER_VERSION, 1395 sl811->port1); 1396 1397 seq_printf(s, "insert/remove: %ld\n", sl811->stat_insrmv); 1398 seq_printf(s, "current session: done_a %ld done_b %ld " 1399 "wake %ld sof %ld overrun %ld lost %ld\n\n", 1400 sl811->stat_a, sl811->stat_b, 1401 sl811->stat_wake, sl811->stat_sof, 1402 sl811->stat_overrun, sl811->stat_lost); 1403 1404 spin_lock_irq(&sl811->lock); 1405 1406 if (sl811->ctrl1 & SL11H_CTL1MASK_SUSPEND) 1407 seq_printf(s, "(suspended)\n\n"); 1408 else { 1409 u8 t = sl811_read(sl811, SL11H_CTLREG1); 1410 1411 seq_printf(s, "ctrl1 %02x%s%s%s%s\n", t, 1412 (t & SL11H_CTL1MASK_SOF_ENA) ? " sofgen" : "", 1413 ({char *s; switch (t & SL11H_CTL1MASK_FORCE) { 1414 case SL11H_CTL1MASK_NORMAL: s = ""; break; 1415 case SL11H_CTL1MASK_SE0: s = " se0/reset"; break; 1416 case SL11H_CTL1MASK_K: s = " k/resume"; break; 1417 default: s = "j"; break; 1418 }; s; }), 1419 (t & SL11H_CTL1MASK_LSPD) ? " lowspeed" : "", 1420 (t & SL11H_CTL1MASK_SUSPEND) ? " suspend" : ""); 1421 1422 dump_irq(s, "irq_enable", 1423 sl811_read(sl811, SL11H_IRQ_ENABLE)); 1424 dump_irq(s, "irq_status", 1425 sl811_read(sl811, SL11H_IRQ_STATUS)); 1426 seq_printf(s, "frame clocks remaining: %d\n", 1427 sl811_read(sl811, SL11H_SOFTMRREG) << 6); 1428 } 1429 1430 seq_printf(s, "A: qh%p ctl %02x sts %02x\n", sl811->active_a, 1431 sl811_read(sl811, SL811_EP_A(SL11H_HOSTCTLREG)), 1432 sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG))); 1433 seq_printf(s, "B: qh%p ctl %02x sts %02x\n", sl811->active_b, 1434 sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG)), 1435 sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG))); 1436 seq_printf(s, "\n"); 1437 list_for_each_entry (ep, &sl811->async, schedule) { 1438 struct urb *urb; 1439 1440 seq_printf(s, "%s%sqh%p, ep%d%s, maxpacket %d" 1441 " nak %d err %d\n", 1442 (ep == sl811->active_a) ? "(A) " : "", 1443 (ep == sl811->active_b) ? "(B) " : "", 1444 ep, ep->epnum, 1445 ({ char *s; switch (ep->nextpid) { 1446 case USB_PID_IN: s = "in"; break; 1447 case USB_PID_OUT: s = "out"; break; 1448 case USB_PID_SETUP: s = "setup"; break; 1449 case USB_PID_ACK: s = "status"; break; 1450 default: s = "?"; break; 1451 }; s;}), 1452 ep->maxpacket, 1453 ep->nak_count, ep->error_count); 1454 list_for_each_entry (urb, &ep->hep->urb_list, urb_list) { 1455 seq_printf(s, " urb%p, %d/%d\n", urb, 1456 urb->actual_length, 1457 urb->transfer_buffer_length); 1458 } 1459 } 1460 if (!list_empty(&sl811->async)) 1461 seq_printf(s, "\n"); 1462 1463 seq_printf(s, "periodic size= %d\n", PERIODIC_SIZE); 1464 1465 for (i = 0; i < PERIODIC_SIZE; i++) { 1466 ep = sl811->periodic[i]; 1467 if (!ep) 1468 continue; 1469 seq_printf(s, "%2d [%3d]:\n", i, sl811->load[i]); 1470 1471 /* DUMB: prints shared entries multiple times */ 1472 do { 1473 seq_printf(s, 1474 " %s%sqh%d/%p (%sdev%d ep%d%s max %d) " 1475 "err %d\n", 1476 (ep == sl811->active_a) ? "(A) " : "", 1477 (ep == sl811->active_b) ? "(B) " : "", 1478 ep->period, ep, 1479 (ep->udev->speed == USB_SPEED_FULL) 1480 ? "" : "ls ", 1481 ep->udev->devnum, ep->epnum, 1482 (ep->epnum == 0) ? "" 1483 : ((ep->nextpid == USB_PID_IN) 1484 ? "in" 1485 : "out"), 1486 ep->maxpacket, ep->error_count); 1487 ep = ep->next; 1488 } while (ep); 1489 } 1490 1491 spin_unlock_irq(&sl811->lock); 1492 seq_printf(s, "\n"); 1493 1494 return 0; 1495 } 1496 1497 static int proc_sl811h_open(struct inode *inode, struct file *file) 1498 { 1499 return single_open(file, proc_sl811h_show, PDE(inode)->data); 1500 } 1501 1502 static const struct file_operations proc_ops = { 1503 .open = proc_sl811h_open, 1504 .read = seq_read, 1505 .llseek = seq_lseek, 1506 .release = single_release, 1507 }; 1508 1509 /* expect just one sl811 per system */ 1510 static const char proc_filename[] = "driver/sl811h"; 1511 1512 static void create_debug_file(struct sl811 *sl811) 1513 { 1514 sl811->pde = proc_create_data(proc_filename, 0, NULL, &proc_ops, sl811); 1515 } 1516 1517 static void remove_debug_file(struct sl811 *sl811) 1518 { 1519 if (sl811->pde) 1520 remove_proc_entry(proc_filename, NULL); 1521 } 1522 1523 #endif 1524 1525 /*-------------------------------------------------------------------------*/ 1526 1527 static void 1528 sl811h_stop(struct usb_hcd *hcd) 1529 { 1530 struct sl811 *sl811 = hcd_to_sl811(hcd); 1531 unsigned long flags; 1532 1533 del_timer_sync(&hcd->rh_timer); 1534 1535 spin_lock_irqsave(&sl811->lock, flags); 1536 port_power(sl811, 0); 1537 spin_unlock_irqrestore(&sl811->lock, flags); 1538 } 1539 1540 static int 1541 sl811h_start(struct usb_hcd *hcd) 1542 { 1543 struct sl811 *sl811 = hcd_to_sl811(hcd); 1544 1545 /* chip has been reset, VBUS power is off */ 1546 hcd->state = HC_STATE_RUNNING; 1547 1548 if (sl811->board) { 1549 if (!device_can_wakeup(hcd->self.controller)) 1550 device_init_wakeup(hcd->self.controller, 1551 sl811->board->can_wakeup); 1552 hcd->power_budget = sl811->board->power * 2; 1553 } 1554 1555 /* enable power and interrupts */ 1556 port_power(sl811, 1); 1557 1558 return 0; 1559 } 1560 1561 /*-------------------------------------------------------------------------*/ 1562 1563 static struct hc_driver sl811h_hc_driver = { 1564 .description = hcd_name, 1565 .hcd_priv_size = sizeof(struct sl811), 1566 1567 /* 1568 * generic hardware linkage 1569 */ 1570 .irq = sl811h_irq, 1571 .flags = HCD_USB11 | HCD_MEMORY, 1572 1573 /* Basic lifecycle operations */ 1574 .start = sl811h_start, 1575 .stop = sl811h_stop, 1576 1577 /* 1578 * managing i/o requests and associated device resources 1579 */ 1580 .urb_enqueue = sl811h_urb_enqueue, 1581 .urb_dequeue = sl811h_urb_dequeue, 1582 .endpoint_disable = sl811h_endpoint_disable, 1583 1584 /* 1585 * periodic schedule support 1586 */ 1587 .get_frame_number = sl811h_get_frame, 1588 1589 /* 1590 * root hub support 1591 */ 1592 .hub_status_data = sl811h_hub_status_data, 1593 .hub_control = sl811h_hub_control, 1594 .bus_suspend = sl811h_bus_suspend, 1595 .bus_resume = sl811h_bus_resume, 1596 }; 1597 1598 /*-------------------------------------------------------------------------*/ 1599 1600 static int __devexit 1601 sl811h_remove(struct platform_device *dev) 1602 { 1603 struct usb_hcd *hcd = platform_get_drvdata(dev); 1604 struct sl811 *sl811 = hcd_to_sl811(hcd); 1605 struct resource *res; 1606 1607 remove_debug_file(sl811); 1608 usb_remove_hcd(hcd); 1609 1610 /* some platforms may use IORESOURCE_IO */ 1611 res = platform_get_resource(dev, IORESOURCE_MEM, 1); 1612 if (res) 1613 iounmap(sl811->data_reg); 1614 1615 res = platform_get_resource(dev, IORESOURCE_MEM, 0); 1616 if (res) 1617 iounmap(sl811->addr_reg); 1618 1619 usb_put_hcd(hcd); 1620 return 0; 1621 } 1622 1623 static int __devinit 1624 sl811h_probe(struct platform_device *dev) 1625 { 1626 struct usb_hcd *hcd; 1627 struct sl811 *sl811; 1628 struct resource *addr, *data, *ires; 1629 int irq; 1630 void __iomem *addr_reg; 1631 void __iomem *data_reg; 1632 int retval; 1633 u8 tmp, ioaddr = 0; 1634 unsigned long irqflags; 1635 1636 /* basic sanity checks first. board-specific init logic should 1637 * have initialized these three resources and probably board 1638 * specific platform_data. we don't probe for IRQs, and do only 1639 * minimal sanity checking. 1640 */ 1641 ires = platform_get_resource(dev, IORESOURCE_IRQ, 0); 1642 if (dev->num_resources < 3 || !ires) 1643 return -ENODEV; 1644 1645 irq = ires->start; 1646 irqflags = ires->flags & IRQF_TRIGGER_MASK; 1647 1648 /* refuse to confuse usbcore */ 1649 if (dev->dev.dma_mask) { 1650 DBG("no we won't dma\n"); 1651 return -EINVAL; 1652 } 1653 1654 /* the chip may be wired for either kind of addressing */ 1655 addr = platform_get_resource(dev, IORESOURCE_MEM, 0); 1656 data = platform_get_resource(dev, IORESOURCE_MEM, 1); 1657 retval = -EBUSY; 1658 if (!addr || !data) { 1659 addr = platform_get_resource(dev, IORESOURCE_IO, 0); 1660 data = platform_get_resource(dev, IORESOURCE_IO, 1); 1661 if (!addr || !data) 1662 return -ENODEV; 1663 ioaddr = 1; 1664 /* 1665 * NOTE: 64-bit resource->start is getting truncated 1666 * to avoid compiler warning, assuming that ->start 1667 * is always 32-bit for this case 1668 */ 1669 addr_reg = (void __iomem *) (unsigned long) addr->start; 1670 data_reg = (void __iomem *) (unsigned long) data->start; 1671 } else { 1672 addr_reg = ioremap(addr->start, 1); 1673 if (addr_reg == NULL) { 1674 retval = -ENOMEM; 1675 goto err2; 1676 } 1677 1678 data_reg = ioremap(data->start, 1); 1679 if (data_reg == NULL) { 1680 retval = -ENOMEM; 1681 goto err4; 1682 } 1683 } 1684 1685 /* allocate and initialize hcd */ 1686 hcd = usb_create_hcd(&sl811h_hc_driver, &dev->dev, dev_name(&dev->dev)); 1687 if (!hcd) { 1688 retval = -ENOMEM; 1689 goto err5; 1690 } 1691 hcd->rsrc_start = addr->start; 1692 sl811 = hcd_to_sl811(hcd); 1693 1694 spin_lock_init(&sl811->lock); 1695 INIT_LIST_HEAD(&sl811->async); 1696 sl811->board = dev->dev.platform_data; 1697 init_timer(&sl811->timer); 1698 sl811->timer.function = sl811h_timer; 1699 sl811->timer.data = (unsigned long) sl811; 1700 sl811->addr_reg = addr_reg; 1701 sl811->data_reg = data_reg; 1702 1703 spin_lock_irq(&sl811->lock); 1704 port_power(sl811, 0); 1705 spin_unlock_irq(&sl811->lock); 1706 msleep(200); 1707 1708 tmp = sl811_read(sl811, SL11H_HWREVREG); 1709 switch (tmp >> 4) { 1710 case 1: 1711 hcd->product_desc = "SL811HS v1.2"; 1712 break; 1713 case 2: 1714 hcd->product_desc = "SL811HS v1.5"; 1715 break; 1716 default: 1717 /* reject case 0, SL11S is less functional */ 1718 DBG("chiprev %02x\n", tmp); 1719 retval = -ENXIO; 1720 goto err6; 1721 } 1722 1723 /* The chip's IRQ is level triggered, active high. A requirement 1724 * for platform device setup is to cope with things like signal 1725 * inverters (e.g. CF is active low) or working only with edge 1726 * triggers (e.g. most ARM CPUs). Initial driver stress testing 1727 * was on a system with single edge triggering, so most sorts of 1728 * triggering arrangement should work. 1729 * 1730 * Use resource IRQ flags if set by platform device setup. 1731 */ 1732 irqflags |= IRQF_SHARED; 1733 retval = usb_add_hcd(hcd, irq, IRQF_DISABLED | irqflags); 1734 if (retval != 0) 1735 goto err6; 1736 1737 create_debug_file(sl811); 1738 return retval; 1739 1740 err6: 1741 usb_put_hcd(hcd); 1742 err5: 1743 if (!ioaddr) 1744 iounmap(data_reg); 1745 err4: 1746 if (!ioaddr) 1747 iounmap(addr_reg); 1748 err2: 1749 DBG("init error, %d\n", retval); 1750 return retval; 1751 } 1752 1753 #ifdef CONFIG_PM 1754 1755 /* for this device there's no useful distinction between the controller 1756 * and its root hub, except that the root hub only gets direct PM calls 1757 * when CONFIG_USB_SUSPEND is enabled. 1758 */ 1759 1760 static int 1761 sl811h_suspend(struct platform_device *dev, pm_message_t state) 1762 { 1763 struct usb_hcd *hcd = platform_get_drvdata(dev); 1764 struct sl811 *sl811 = hcd_to_sl811(hcd); 1765 int retval = 0; 1766 1767 switch (state.event) { 1768 case PM_EVENT_FREEZE: 1769 retval = sl811h_bus_suspend(hcd); 1770 break; 1771 case PM_EVENT_SUSPEND: 1772 case PM_EVENT_HIBERNATE: 1773 case PM_EVENT_PRETHAW: /* explicitly discard hw state */ 1774 port_power(sl811, 0); 1775 break; 1776 } 1777 return retval; 1778 } 1779 1780 static int 1781 sl811h_resume(struct platform_device *dev) 1782 { 1783 struct usb_hcd *hcd = platform_get_drvdata(dev); 1784 struct sl811 *sl811 = hcd_to_sl811(hcd); 1785 1786 /* with no "check to see if VBUS is still powered" board hook, 1787 * let's assume it'd only be powered to enable remote wakeup. 1788 */ 1789 if (!sl811->port1 || !device_can_wakeup(&hcd->self.root_hub->dev)) { 1790 sl811->port1 = 0; 1791 port_power(sl811, 1); 1792 usb_root_hub_lost_power(hcd->self.root_hub); 1793 return 0; 1794 } 1795 1796 return sl811h_bus_resume(hcd); 1797 } 1798 1799 #else 1800 1801 #define sl811h_suspend NULL 1802 #define sl811h_resume NULL 1803 1804 #endif 1805 1806 1807 /* this driver is exported so sl811_cs can depend on it */ 1808 struct platform_driver sl811h_driver = { 1809 .probe = sl811h_probe, 1810 .remove = __devexit_p(sl811h_remove), 1811 1812 .suspend = sl811h_suspend, 1813 .resume = sl811h_resume, 1814 .driver = { 1815 .name = (char *) hcd_name, 1816 .owner = THIS_MODULE, 1817 }, 1818 }; 1819 EXPORT_SYMBOL(sl811h_driver); 1820 1821 /*-------------------------------------------------------------------------*/ 1822 1823 static int __init sl811h_init(void) 1824 { 1825 if (usb_disabled()) 1826 return -ENODEV; 1827 1828 INFO("driver %s, %s\n", hcd_name, DRIVER_VERSION); 1829 return platform_driver_register(&sl811h_driver); 1830 } 1831 module_init(sl811h_init); 1832 1833 static void __exit sl811h_cleanup(void) 1834 { 1835 platform_driver_unregister(&sl811h_driver); 1836 } 1837 module_exit(sl811h_cleanup); 1838