2 * SL811HS HCD (Host Controller Driver) for USB.
4 * Copyright (C) 2004 Psion Teklogix (for NetBook PRO)
5 * Copyright (C) 2004-2005 David Brownell
7 * Periodic scheduling is based on Roman's OHCI code
8 * Copyright (C) 1999 Roman Weissgaerber
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).
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.
21 * Status: Passed basic stress testing, works with hubs, mice, keyboards,
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
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 #include <linux/prefetch.h>
54 #include <asm/system.h>
55 #include <asm/byteorder.h>
56 #include <asm/unaligned.h>
61 MODULE_DESCRIPTION("SL811HS USB Host Controller Driver");
62 MODULE_LICENSE("GPL");
63 MODULE_ALIAS("platform:sl811-hcd");
65 #define DRIVER_VERSION "19 May 2005"
69 # define STUB_DEBUG_FILE
72 /* for now, use only one transfer register bank */
78 static const char hcd_name[] = "sl811-hcd";
80 /*-------------------------------------------------------------------------*/
82 static void port_power(struct sl811 *sl811, int is_on)
84 struct usb_hcd *hcd = sl811_to_hcd(sl811);
86 /* hub is inactive unless the port is powered */
88 if (sl811->port1 & USB_PORT_STAT_POWER)
91 sl811->port1 = USB_PORT_STAT_POWER;
92 sl811->irq_enable = SL11H_INTMASK_INSRMV;
95 sl811->irq_enable = 0;
96 hcd->state = HC_STATE_HALT;
99 sl811_write(sl811, SL11H_IRQ_ENABLE, 0);
100 sl811_write(sl811, SL11H_IRQ_STATUS, ~0);
102 if (sl811->board && sl811->board->port_power) {
103 /* switch VBUS, at 500mA unless hub power budget gets set */
104 DBG("power %s\n", is_on ? "on" : "off");
105 sl811->board->port_power(hcd->self.controller, is_on);
108 /* reset as thoroughly as we can */
109 if (sl811->board && sl811->board->reset)
110 sl811->board->reset(hcd->self.controller);
112 sl811_write(sl811, SL11H_CTLREG1, SL11H_CTL1MASK_SE0);
116 sl811_write(sl811, SL11H_IRQ_ENABLE, 0);
117 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
118 sl811_write(sl811, SL811HS_CTLREG2, SL811HS_CTL2_INIT);
119 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
121 // if !is_on, put into lowpower mode now
124 /*-------------------------------------------------------------------------*/
126 /* This is a PIO-only HCD. Queueing appends URBs to the endpoint's queue,
127 * and may start I/O. Endpoint queues are scanned during completion irq
128 * handlers (one per packet: ACK, NAK, faults, etc) and urb cancellation.
130 * Using an external DMA engine to copy a packet at a time could work,
131 * though setup/teardown costs may be too big to make it worthwhile.
134 /* SETUP starts a new control request. Devices are not allowed to
135 * STALL or NAK these; they must cancel any pending control requests.
137 static void setup_packet(
139 struct sl811h_ep *ep,
147 void __iomem *data_reg;
149 addr = SL811HS_PACKET_BUF(bank == 0);
150 len = sizeof(struct usb_ctrlrequest);
151 data_reg = sl811->data_reg;
152 sl811_write_buf(sl811, addr, urb->setup_packet, len);
154 /* autoincrementing */
155 sl811_write(sl811, bank + SL11H_BUFADDRREG, addr);
156 writeb(len, data_reg);
157 writeb(SL_SETUP /* | ep->epnum */, data_reg);
158 writeb(usb_pipedevice(urb->pipe), data_reg);
160 /* always OUT/data0 */ ;
161 sl811_write(sl811, bank + SL11H_HOSTCTLREG,
162 control | SL11H_HCTLMASK_OUT);
164 PACKET("SETUP qh%p\n", ep);
167 /* STATUS finishes control requests, often after IN or OUT data packets */
168 static void status_packet(
170 struct sl811h_ep *ep,
177 void __iomem *data_reg;
179 do_out = urb->transfer_buffer_length && usb_pipein(urb->pipe);
180 data_reg = sl811->data_reg;
182 /* autoincrementing */
183 sl811_write(sl811, bank + SL11H_BUFADDRREG, 0);
185 writeb((do_out ? SL_OUT : SL_IN) /* | ep->epnum */, data_reg);
186 writeb(usb_pipedevice(urb->pipe), data_reg);
188 /* always data1; sometimes IN */
189 control |= SL11H_HCTLMASK_TOGGLE;
191 control |= SL11H_HCTLMASK_OUT;
192 sl811_write(sl811, bank + SL11H_HOSTCTLREG, control);
194 PACKET("STATUS%s/%s qh%p\n", ep->nak_count ? "/retry" : "",
195 do_out ? "out" : "in", ep);
198 /* IN packets can be used with any type of endpoint. here we just
199 * start the transfer, data from the peripheral may arrive later.
200 * urb->iso_frame_desc is currently ignored here...
202 static void in_packet(
204 struct sl811h_ep *ep,
212 void __iomem *data_reg;
214 /* avoid losing data on overflow */
216 addr = SL811HS_PACKET_BUF(bank == 0);
217 if (!(control & SL11H_HCTLMASK_ISOCH)
218 && usb_gettoggle(urb->dev, ep->epnum, 0))
219 control |= SL11H_HCTLMASK_TOGGLE;
220 data_reg = sl811->data_reg;
222 /* autoincrementing */
223 sl811_write(sl811, bank + SL11H_BUFADDRREG, addr);
224 writeb(len, data_reg);
225 writeb(SL_IN | ep->epnum, data_reg);
226 writeb(usb_pipedevice(urb->pipe), data_reg);
228 sl811_write(sl811, bank + SL11H_HOSTCTLREG, control);
229 ep->length = min_t(u32, len,
230 urb->transfer_buffer_length - urb->actual_length);
231 PACKET("IN%s/%d qh%p len%d\n", ep->nak_count ? "/retry" : "",
232 !!usb_gettoggle(urb->dev, ep->epnum, 0), ep, len);
235 /* OUT packets can be used with any type of endpoint.
236 * urb->iso_frame_desc is currently ignored here...
238 static void out_packet(
240 struct sl811h_ep *ep,
249 void __iomem *data_reg;
251 buf = urb->transfer_buffer + urb->actual_length;
254 len = min_t(u32, ep->maxpacket,
255 urb->transfer_buffer_length - urb->actual_length);
257 if (!(control & SL11H_HCTLMASK_ISOCH)
258 && usb_gettoggle(urb->dev, ep->epnum, 1))
259 control |= SL11H_HCTLMASK_TOGGLE;
260 addr = SL811HS_PACKET_BUF(bank == 0);
261 data_reg = sl811->data_reg;
263 sl811_write_buf(sl811, addr, buf, len);
265 /* autoincrementing */
266 sl811_write(sl811, bank + SL11H_BUFADDRREG, addr);
267 writeb(len, data_reg);
268 writeb(SL_OUT | ep->epnum, data_reg);
269 writeb(usb_pipedevice(urb->pipe), data_reg);
271 sl811_write(sl811, bank + SL11H_HOSTCTLREG,
272 control | SL11H_HCTLMASK_OUT);
274 PACKET("OUT%s/%d qh%p len%d\n", ep->nak_count ? "/retry" : "",
275 !!usb_gettoggle(urb->dev, ep->epnum, 1), ep, len);
278 /*-------------------------------------------------------------------------*/
280 /* caller updates on-chip enables later */
282 static inline void sofirq_on(struct sl811 *sl811)
284 if (sl811->irq_enable & SL11H_INTMASK_SOFINTR)
286 VDBG("sof irq on\n");
287 sl811->irq_enable |= SL11H_INTMASK_SOFINTR;
290 static inline void sofirq_off(struct sl811 *sl811)
292 if (!(sl811->irq_enable & SL11H_INTMASK_SOFINTR))
294 VDBG("sof irq off\n");
295 sl811->irq_enable &= ~SL11H_INTMASK_SOFINTR;
298 /*-------------------------------------------------------------------------*/
300 /* pick the next endpoint for a transaction, and issue it.
301 * frames start with periodic transfers (after whatever is pending
302 * from the previous frame), and the rest of the time is async
303 * transfers, scheduled round-robin.
305 static struct sl811h_ep *start(struct sl811 *sl811, u8 bank)
307 struct sl811h_ep *ep;
312 /* use endpoint at schedule head */
313 if (sl811->next_periodic) {
314 ep = sl811->next_periodic;
315 sl811->next_periodic = ep->next;
317 if (sl811->next_async)
318 ep = sl811->next_async;
319 else if (!list_empty(&sl811->async))
320 ep = container_of(sl811->async.next,
321 struct sl811h_ep, schedule);
323 /* could set up the first fullspeed periodic
324 * transfer for the next frame ...
330 if ((bank && sl811->active_b == ep) || sl811->active_a == ep)
334 if (ep->schedule.next == &sl811->async)
335 sl811->next_async = NULL;
337 sl811->next_async = container_of(ep->schedule.next,
338 struct sl811h_ep, schedule);
341 if (unlikely(list_empty(&ep->hep->urb_list))) {
342 DBG("empty %p queue?\n", ep);
346 urb = container_of(ep->hep->urb_list.next, struct urb, urb_list);
347 control = ep->defctrl;
349 /* if this frame doesn't have enough time left to transfer this
350 * packet, wait till the next frame. too-simple algorithm...
352 fclock = sl811_read(sl811, SL11H_SOFTMRREG) << 6;
353 fclock -= 100; /* setup takes not much time */
354 if (urb->dev->speed == USB_SPEED_LOW) {
355 if (control & SL11H_HCTLMASK_PREAMBLE) {
356 /* also note erratum 1: some hubs won't work */
359 fclock -= ep->maxpacket << 8;
361 /* erratum 2: AFTERSOF only works for fullspeed */
364 sl811->stat_overrun++;
369 fclock -= 12000 / 19; /* 19 64byte packets/msec */
372 sl811->stat_overrun++;
373 control |= SL11H_HCTLMASK_AFTERSOF;
375 /* throttle bulk/control irq noise */
376 } else if (ep->nak_count)
377 control |= SL11H_HCTLMASK_AFTERSOF;
381 switch (ep->nextpid) {
383 in_packet(sl811, ep, urb, bank, control);
386 out_packet(sl811, ep, urb, bank, control);
389 setup_packet(sl811, ep, urb, bank, control);
391 case USB_PID_ACK: /* for control status */
392 status_packet(sl811, ep, urb, bank, control);
395 DBG("bad ep%p pid %02x\n", ep, ep->nextpid);
401 #define MIN_JIFFIES ((msecs_to_jiffies(2) > 1) ? msecs_to_jiffies(2) : 2)
403 static inline void start_transfer(struct sl811 *sl811)
405 if (sl811->port1 & USB_PORT_STAT_SUSPEND)
407 if (sl811->active_a == NULL) {
408 sl811->active_a = start(sl811, SL811_EP_A(SL811_HOST_BUF));
409 if (sl811->active_a != NULL)
410 sl811->jiffies_a = jiffies + MIN_JIFFIES;
413 if (sl811->active_b == NULL) {
414 sl811->active_b = start(sl811, SL811_EP_B(SL811_HOST_BUF));
415 if (sl811->active_b != NULL)
416 sl811->jiffies_b = jiffies + MIN_JIFFIES;
421 static void finish_request(
423 struct sl811h_ep *ep,
426 ) __releases(sl811->lock) __acquires(sl811->lock)
430 if (usb_pipecontrol(urb->pipe))
431 ep->nextpid = USB_PID_SETUP;
433 usb_hcd_unlink_urb_from_ep(sl811_to_hcd(sl811), urb);
434 spin_unlock(&sl811->lock);
435 usb_hcd_giveback_urb(sl811_to_hcd(sl811), urb, status);
436 spin_lock(&sl811->lock);
438 /* leave active endpoints in the schedule */
439 if (!list_empty(&ep->hep->urb_list))
442 /* async deschedule? */
443 if (!list_empty(&ep->schedule)) {
444 list_del_init(&ep->schedule);
445 if (ep == sl811->next_async)
446 sl811->next_async = NULL;
450 /* periodic deschedule */
451 DBG("deschedule qh%d/%p branch %d\n", ep->period, ep, ep->branch);
452 for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
453 struct sl811h_ep *temp;
454 struct sl811h_ep **prev = &sl811->periodic[i];
456 while (*prev && ((temp = *prev) != ep))
460 sl811->load[i] -= ep->load;
462 ep->branch = PERIODIC_SIZE;
463 sl811->periodic_count--;
464 sl811_to_hcd(sl811)->self.bandwidth_allocated
465 -= ep->load / ep->period;
466 if (ep == sl811->next_periodic)
467 sl811->next_periodic = ep->next;
469 /* we might turn SOFs back on again for the async schedule */
470 if (sl811->periodic_count == 0)
475 done(struct sl811 *sl811, struct sl811h_ep *ep, u8 bank)
479 int urbstat = -EINPROGRESS;
484 status = sl811_read(sl811, bank + SL11H_PKTSTATREG);
486 urb = container_of(ep->hep->urb_list.next, struct urb, urb_list);
488 /* we can safely ignore NAKs */
489 if (status & SL11H_STATMASK_NAK) {
490 // PACKET("...NAK_%02x qh%p\n", bank, ep);
495 /* ACK advances transfer, toggle, and maybe queue */
496 } else if (status & SL11H_STATMASK_ACK) {
497 struct usb_device *udev = urb->dev;
501 /* urb->iso_frame_desc is currently ignored here... */
503 ep->nak_count = ep->error_count = 0;
504 switch (ep->nextpid) {
506 // PACKET("...ACK/out_%02x qh%p\n", bank, ep);
507 urb->actual_length += ep->length;
508 usb_dotoggle(udev, ep->epnum, 1);
509 if (urb->actual_length
510 == urb->transfer_buffer_length) {
511 if (usb_pipecontrol(urb->pipe))
512 ep->nextpid = USB_PID_ACK;
514 /* some bulk protocols terminate OUT transfers
515 * by a short packet, using ZLPs not padding.
517 else if (ep->length < ep->maxpacket
518 || !(urb->transfer_flags
524 // PACKET("...ACK/in_%02x qh%p\n", bank, ep);
525 buf = urb->transfer_buffer + urb->actual_length;
527 len = ep->maxpacket - sl811_read(sl811,
528 bank + SL11H_XFERCNTREG);
529 if (len > ep->length) {
531 urbstat = -EOVERFLOW;
533 urb->actual_length += len;
534 sl811_read_buf(sl811, SL811HS_PACKET_BUF(bank == 0),
536 usb_dotoggle(udev, ep->epnum, 0);
537 if (urbstat == -EINPROGRESS &&
538 (len < ep->maxpacket ||
539 urb->actual_length ==
540 urb->transfer_buffer_length)) {
541 if (usb_pipecontrol(urb->pipe))
542 ep->nextpid = USB_PID_ACK;
548 // PACKET("...ACK/setup_%02x qh%p\n", bank, ep);
549 if (urb->transfer_buffer_length == urb->actual_length)
550 ep->nextpid = USB_PID_ACK;
551 else if (usb_pipeout(urb->pipe)) {
552 usb_settoggle(udev, 0, 1, 1);
553 ep->nextpid = USB_PID_OUT;
555 usb_settoggle(udev, 0, 0, 1);
556 ep->nextpid = USB_PID_IN;
560 // PACKET("...ACK/status_%02x qh%p\n", bank, ep);
565 /* STALL stops all transfers */
566 } else if (status & SL11H_STATMASK_STALL) {
567 PACKET("...STALL_%02x qh%p\n", bank, ep);
568 ep->nak_count = ep->error_count = 0;
571 /* error? retry, until "3 strikes" */
572 } else if (++ep->error_count >= 3) {
573 if (status & SL11H_STATMASK_TMOUT)
575 else if (status & SL11H_STATMASK_OVF)
576 urbstat = -EOVERFLOW;
580 PACKET("...3STRIKES_%02x %02x qh%p stat %d\n",
581 bank, status, ep, urbstat);
584 if (urbstat != -EINPROGRESS || urb->unlinked)
585 finish_request(sl811, ep, urb, urbstat);
588 static inline u8 checkdone(struct sl811 *sl811)
593 if (sl811->active_a && time_before_eq(sl811->jiffies_a, jiffies)) {
594 ctl = sl811_read(sl811, SL811_EP_A(SL11H_HOSTCTLREG));
595 if (ctl & SL11H_HCTLMASK_ARM)
596 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0);
597 DBG("%s DONE_A: ctrl %02x sts %02x\n",
598 (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost",
600 sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG)));
601 irqstat |= SL11H_INTMASK_DONE_A;
604 if (sl811->active_b && time_before_eq(sl811->jiffies_b, jiffies)) {
605 ctl = sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG));
606 if (ctl & SL11H_HCTLMASK_ARM)
607 sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0);
608 DBG("%s DONE_B: ctrl %02x sts %02x\n",
609 (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost",
611 sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG)));
612 irqstat |= SL11H_INTMASK_DONE_A;
618 static irqreturn_t sl811h_irq(struct usb_hcd *hcd)
620 struct sl811 *sl811 = hcd_to_sl811(hcd);
622 irqreturn_t ret = IRQ_NONE;
623 unsigned retries = 5;
625 spin_lock(&sl811->lock);
628 irqstat = sl811_read(sl811, SL11H_IRQ_STATUS) & ~SL11H_INTMASK_DP;
630 sl811_write(sl811, SL11H_IRQ_STATUS, irqstat);
631 irqstat &= sl811->irq_enable;
635 /* this may no longer be necessary ... */
637 irqstat = checkdone(sl811);
643 /* USB packets, not necessarily handled in the order they're
644 * issued ... that's fine if they're different endpoints.
646 if (irqstat & SL11H_INTMASK_DONE_A) {
647 done(sl811, sl811->active_a, SL811_EP_A(SL811_HOST_BUF));
648 sl811->active_a = NULL;
652 if (irqstat & SL11H_INTMASK_DONE_B) {
653 done(sl811, sl811->active_b, SL811_EP_B(SL811_HOST_BUF));
654 sl811->active_b = NULL;
658 if (irqstat & SL11H_INTMASK_SOFINTR) {
661 index = sl811->frame++ % (PERIODIC_SIZE - 1);
664 /* be graceful about almost-inevitable periodic schedule
665 * overruns: continue the previous frame's transfers iff
666 * this one has nothing scheduled.
668 if (sl811->next_periodic) {
669 // ERR("overrun to slot %d\n", index);
670 sl811->stat_overrun++;
672 if (sl811->periodic[index])
673 sl811->next_periodic = sl811->periodic[index];
676 /* khubd manages debouncing and wakeup */
677 if (irqstat & SL11H_INTMASK_INSRMV) {
678 sl811->stat_insrmv++;
680 /* most stats are reset for each VBUS session */
681 sl811->stat_wake = 0;
685 sl811->stat_lost = 0;
688 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
690 sl811->irq_enable = SL11H_INTMASK_INSRMV;
691 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
693 /* usbcore nukes other pending transactions on disconnect */
694 if (sl811->active_a) {
695 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0);
696 finish_request(sl811, sl811->active_a,
697 container_of(sl811->active_a
698 ->hep->urb_list.next,
699 struct urb, urb_list),
701 sl811->active_a = NULL;
704 if (sl811->active_b) {
705 sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0);
706 finish_request(sl811, sl811->active_b,
707 container_of(sl811->active_b
708 ->hep->urb_list.next,
709 struct urb, urb_list),
711 sl811->active_b = NULL;
715 /* port status seems weird until after reset, so
716 * force the reset and make khubd clean up later.
718 if (irqstat & SL11H_INTMASK_RD)
719 sl811->port1 &= ~USB_PORT_STAT_CONNECTION;
721 sl811->port1 |= USB_PORT_STAT_CONNECTION;
723 sl811->port1 |= USB_PORT_STAT_C_CONNECTION << 16;
725 } else if (irqstat & SL11H_INTMASK_RD) {
726 if (sl811->port1 & USB_PORT_STAT_SUSPEND) {
728 sl811->port1 |= USB_PORT_STAT_C_SUSPEND << 16;
731 irqstat &= ~SL11H_INTMASK_RD;
735 if (sl811->port1 & USB_PORT_STAT_ENABLE)
736 start_transfer(sl811);
742 if (sl811->periodic_count == 0 && list_empty(&sl811->async))
744 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
746 spin_unlock(&sl811->lock);
751 /*-------------------------------------------------------------------------*/
753 /* usb 1.1 says max 90% of a frame is available for periodic transfers.
754 * this driver doesn't promise that much since it's got to handle an
755 * IRQ per packet; irq handling latencies also use up that time.
757 * NOTE: the periodic schedule is a sparse tree, with the load for
758 * each branch minimized. see fig 3.5 in the OHCI spec for example.
760 #define MAX_PERIODIC_LOAD 500 /* out of 1000 usec */
762 static int balance(struct sl811 *sl811, u16 period, u16 load)
764 int i, branch = -ENOSPC;
766 /* search for the least loaded schedule branch of that period
767 * which has enough bandwidth left unreserved.
769 for (i = 0; i < period ; i++) {
770 if (branch < 0 || sl811->load[branch] > sl811->load[i]) {
773 for (j = i; j < PERIODIC_SIZE; j += period) {
774 if ((sl811->load[j] + load)
778 if (j < PERIODIC_SIZE)
786 /*-------------------------------------------------------------------------*/
788 static int sl811h_urb_enqueue(
793 struct sl811 *sl811 = hcd_to_sl811(hcd);
794 struct usb_device *udev = urb->dev;
795 unsigned int pipe = urb->pipe;
796 int is_out = !usb_pipein(pipe);
797 int type = usb_pipetype(pipe);
798 int epnum = usb_pipeendpoint(pipe);
799 struct sl811h_ep *ep = NULL;
803 struct usb_host_endpoint *hep = urb->ep;
805 #ifndef CONFIG_USB_SL811_HCD_ISO
806 if (type == PIPE_ISOCHRONOUS)
810 /* avoid all allocations within spinlocks */
812 ep = kzalloc(sizeof *ep, mem_flags);
817 spin_lock_irqsave(&sl811->lock, flags);
819 /* don't submit to a dead or disabled port */
820 if (!(sl811->port1 & USB_PORT_STAT_ENABLE)
821 || !HC_IS_RUNNING(hcd->state)) {
824 goto fail_not_linked;
826 retval = usb_hcd_link_urb_to_ep(hcd, urb);
829 goto fail_not_linked;
840 INIT_LIST_HEAD(&ep->schedule);
843 ep->maxpacket = usb_maxpacket(udev, urb->pipe, is_out);
844 ep->defctrl = SL11H_HCTLMASK_ARM | SL11H_HCTLMASK_ENABLE;
845 usb_settoggle(udev, epnum, is_out, 0);
847 if (type == PIPE_CONTROL)
848 ep->nextpid = USB_PID_SETUP;
850 ep->nextpid = USB_PID_OUT;
852 ep->nextpid = USB_PID_IN;
854 if (ep->maxpacket > H_MAXPACKET) {
855 /* iso packets up to 240 bytes could work... */
856 DBG("dev %d ep%d maxpacket %d\n",
857 udev->devnum, epnum, ep->maxpacket);
863 if (udev->speed == USB_SPEED_LOW) {
864 /* send preamble for external hub? */
865 if (!(sl811->ctrl1 & SL11H_CTL1MASK_LSPD))
866 ep->defctrl |= SL11H_HCTLMASK_PREAMBLE;
869 case PIPE_ISOCHRONOUS:
871 if (urb->interval > PERIODIC_SIZE)
872 urb->interval = PERIODIC_SIZE;
873 ep->period = urb->interval;
874 ep->branch = PERIODIC_SIZE;
875 if (type == PIPE_ISOCHRONOUS)
876 ep->defctrl |= SL11H_HCTLMASK_ISOCH;
877 ep->load = usb_calc_bus_time(udev->speed, !is_out,
878 (type == PIPE_ISOCHRONOUS),
879 usb_maxpacket(udev, pipe, is_out))
888 /* maybe put endpoint into schedule */
892 if (list_empty(&ep->schedule))
893 list_add_tail(&ep->schedule, &sl811->async);
895 case PIPE_ISOCHRONOUS:
897 urb->interval = ep->period;
898 if (ep->branch < PERIODIC_SIZE) {
899 /* NOTE: the phase is correct here, but the value
900 * needs offsetting by the transfer queue depth.
901 * All current drivers ignore start_frame, so this
902 * is unlikely to ever matter...
904 urb->start_frame = (sl811->frame & (PERIODIC_SIZE - 1))
909 retval = balance(sl811, ep->period, ep->load);
914 urb->start_frame = (sl811->frame & (PERIODIC_SIZE - 1))
917 /* sort each schedule branch by period (slow before fast)
918 * to share the faster parts of the tree without needing
919 * dummy/placeholder nodes
921 DBG("schedule qh%d/%p branch %d\n", ep->period, ep, ep->branch);
922 for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
923 struct sl811h_ep **prev = &sl811->periodic[i];
924 struct sl811h_ep *here = *prev;
926 while (here && ep != here) {
927 if (ep->period > here->period)
936 sl811->load[i] += ep->load;
938 sl811->periodic_count++;
939 hcd->self.bandwidth_allocated += ep->load / ep->period;
944 start_transfer(sl811);
945 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
948 usb_hcd_unlink_urb_from_ep(hcd, urb);
950 spin_unlock_irqrestore(&sl811->lock, flags);
954 static int sl811h_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
956 struct sl811 *sl811 = hcd_to_sl811(hcd);
957 struct usb_host_endpoint *hep;
959 struct sl811h_ep *ep;
962 spin_lock_irqsave(&sl811->lock, flags);
963 retval = usb_hcd_check_unlink_urb(hcd, urb, status);
970 /* finish right away if this urb can't be active ...
971 * note that some drivers wrongly expect delays
973 if (ep->hep->urb_list.next != &urb->urb_list) {
974 /* not front of queue? never active */
976 /* for active transfers, we expect an IRQ */
977 } else if (sl811->active_a == ep) {
978 if (time_before_eq(sl811->jiffies_a, jiffies)) {
979 /* happens a lot with lowspeed?? */
980 DBG("giveup on DONE_A: ctrl %02x sts %02x\n",
982 SL811_EP_A(SL11H_HOSTCTLREG)),
984 SL811_EP_A(SL11H_PKTSTATREG)));
985 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG),
987 sl811->active_a = NULL;
991 } else if (sl811->active_b == ep) {
992 if (time_before_eq(sl811->jiffies_a, jiffies)) {
993 /* happens a lot with lowspeed?? */
994 DBG("giveup on DONE_B: ctrl %02x sts %02x\n",
996 SL811_EP_B(SL11H_HOSTCTLREG)),
998 SL811_EP_B(SL11H_PKTSTATREG)));
999 sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG),
1001 sl811->active_b = NULL;
1006 /* front of queue for inactive endpoint */
1010 finish_request(sl811, ep, urb, 0);
1012 VDBG("dequeue, urb %p active %s; wait4irq\n", urb,
1013 (sl811->active_a == ep) ? "A" : "B");
1017 spin_unlock_irqrestore(&sl811->lock, flags);
1022 sl811h_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *hep)
1024 struct sl811h_ep *ep = hep->hcpriv;
1029 /* assume we'd just wait for the irq */
1030 if (!list_empty(&hep->urb_list))
1032 if (!list_empty(&hep->urb_list))
1033 WARNING("ep %p not empty?\n", ep);
1040 sl811h_get_frame(struct usb_hcd *hcd)
1042 struct sl811 *sl811 = hcd_to_sl811(hcd);
1044 /* wrong except while periodic transfers are scheduled;
1045 * never matches the on-the-wire frame;
1046 * subject to overruns.
1048 return sl811->frame;
1052 /*-------------------------------------------------------------------------*/
1054 /* the virtual root hub timer IRQ checks for hub status */
1056 sl811h_hub_status_data(struct usb_hcd *hcd, char *buf)
1058 struct sl811 *sl811 = hcd_to_sl811(hcd);
1060 unsigned long flags;
1062 /* non-SMP HACK: use root hub timer as i/o watchdog
1063 * this seems essential when SOF IRQs aren't in use...
1065 local_irq_save(flags);
1066 if (!timer_pending(&sl811->timer)) {
1067 if (sl811h_irq( /* ~0, */ hcd) != IRQ_NONE)
1070 local_irq_restore(flags);
1073 if (!(sl811->port1 & (0xffff << 16)))
1076 /* tell khubd port 1 changed */
1082 sl811h_hub_descriptor (
1083 struct sl811 *sl811,
1084 struct usb_hub_descriptor *desc
1088 desc->bDescriptorType = 0x29;
1089 desc->bHubContrCurrent = 0;
1091 desc->bNbrPorts = 1;
1092 desc->bDescLength = 9;
1094 /* per-port power switching (gang of one!), or none */
1095 desc->bPwrOn2PwrGood = 0;
1096 if (sl811->board && sl811->board->port_power) {
1097 desc->bPwrOn2PwrGood = sl811->board->potpg;
1098 if (!desc->bPwrOn2PwrGood)
1099 desc->bPwrOn2PwrGood = 10;
1104 /* no overcurrent errors detection/handling */
1107 desc->wHubCharacteristics = cpu_to_le16(temp);
1109 /* ports removable, and legacy PortPwrCtrlMask */
1110 desc->u.hs.DeviceRemovable[0] = 0 << 1;
1111 desc->u.hs.DeviceRemovable[1] = ~0;
1115 sl811h_timer(unsigned long _sl811)
1117 struct sl811 *sl811 = (void *) _sl811;
1118 unsigned long flags;
1120 u8 signaling = sl811->ctrl1 & SL11H_CTL1MASK_FORCE;
1121 const u32 mask = USB_PORT_STAT_CONNECTION
1122 | USB_PORT_STAT_ENABLE
1123 | USB_PORT_STAT_LOW_SPEED;
1125 spin_lock_irqsave(&sl811->lock, flags);
1127 /* stop special signaling */
1128 sl811->ctrl1 &= ~SL11H_CTL1MASK_FORCE;
1129 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1132 irqstat = sl811_read(sl811, SL11H_IRQ_STATUS);
1134 switch (signaling) {
1135 case SL11H_CTL1MASK_SE0:
1137 sl811->port1 = (USB_PORT_STAT_C_RESET << 16)
1138 | USB_PORT_STAT_POWER;
1140 /* don't wrongly ack RD */
1141 if (irqstat & SL11H_INTMASK_INSRMV)
1142 irqstat &= ~SL11H_INTMASK_RD;
1144 case SL11H_CTL1MASK_K:
1145 DBG("end resume\n");
1146 sl811->port1 &= ~USB_PORT_STAT_SUSPEND;
1149 DBG("odd timer signaling: %02x\n", signaling);
1152 sl811_write(sl811, SL11H_IRQ_STATUS, irqstat);
1154 if (irqstat & SL11H_INTMASK_RD) {
1155 /* usbcore nukes all pending transactions on disconnect */
1156 if (sl811->port1 & USB_PORT_STAT_CONNECTION)
1157 sl811->port1 |= (USB_PORT_STAT_C_CONNECTION << 16)
1158 | (USB_PORT_STAT_C_ENABLE << 16);
1159 sl811->port1 &= ~mask;
1160 sl811->irq_enable = SL11H_INTMASK_INSRMV;
1162 sl811->port1 |= mask;
1163 if (irqstat & SL11H_INTMASK_DP)
1164 sl811->port1 &= ~USB_PORT_STAT_LOW_SPEED;
1165 sl811->irq_enable = SL11H_INTMASK_INSRMV | SL11H_INTMASK_RD;
1168 if (sl811->port1 & USB_PORT_STAT_CONNECTION) {
1169 u8 ctrl2 = SL811HS_CTL2_INIT;
1171 sl811->irq_enable |= SL11H_INTMASK_DONE_A;
1173 sl811->irq_enable |= SL11H_INTMASK_DONE_B;
1175 if (sl811->port1 & USB_PORT_STAT_LOW_SPEED) {
1176 sl811->ctrl1 |= SL11H_CTL1MASK_LSPD;
1177 ctrl2 |= SL811HS_CTL2MASK_DSWAP;
1180 /* start SOFs flowing, kickstarting with A registers */
1181 sl811->ctrl1 |= SL11H_CTL1MASK_SOF_ENA;
1182 sl811_write(sl811, SL11H_SOFLOWREG, 0xe0);
1183 sl811_write(sl811, SL811HS_CTLREG2, ctrl2);
1185 /* autoincrementing */
1186 sl811_write(sl811, SL811_EP_A(SL11H_BUFLNTHREG), 0);
1187 writeb(SL_SOF, sl811->data_reg);
1188 writeb(0, sl811->data_reg);
1189 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG),
1190 SL11H_HCTLMASK_ARM);
1192 /* khubd provides debounce delay */
1196 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1199 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
1200 spin_unlock_irqrestore(&sl811->lock, flags);
1205 struct usb_hcd *hcd,
1212 struct sl811 *sl811 = hcd_to_sl811(hcd);
1214 unsigned long flags;
1216 spin_lock_irqsave(&sl811->lock, flags);
1219 case ClearHubFeature:
1222 case C_HUB_OVER_CURRENT:
1223 case C_HUB_LOCAL_POWER:
1229 case ClearPortFeature:
1230 if (wIndex != 1 || wLength != 0)
1234 case USB_PORT_FEAT_ENABLE:
1235 sl811->port1 &= USB_PORT_STAT_POWER;
1237 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1238 sl811->irq_enable = SL11H_INTMASK_INSRMV;
1239 sl811_write(sl811, SL11H_IRQ_ENABLE,
1242 case USB_PORT_FEAT_SUSPEND:
1243 if (!(sl811->port1 & USB_PORT_STAT_SUSPEND))
1246 /* 20 msec of resume/K signaling, other irqs blocked */
1247 DBG("start resume...\n");
1248 sl811->irq_enable = 0;
1249 sl811_write(sl811, SL11H_IRQ_ENABLE,
1251 sl811->ctrl1 |= SL11H_CTL1MASK_K;
1252 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1254 mod_timer(&sl811->timer, jiffies
1255 + msecs_to_jiffies(20));
1257 case USB_PORT_FEAT_POWER:
1258 port_power(sl811, 0);
1260 case USB_PORT_FEAT_C_ENABLE:
1261 case USB_PORT_FEAT_C_SUSPEND:
1262 case USB_PORT_FEAT_C_CONNECTION:
1263 case USB_PORT_FEAT_C_OVER_CURRENT:
1264 case USB_PORT_FEAT_C_RESET:
1269 sl811->port1 &= ~(1 << wValue);
1271 case GetHubDescriptor:
1272 sl811h_hub_descriptor(sl811, (struct usb_hub_descriptor *) buf);
1275 put_unaligned_le32(0, buf);
1280 put_unaligned_le32(sl811->port1, buf);
1283 if (*(u16*)(buf+2)) /* only if wPortChange is interesting */
1285 DBG("GetPortStatus %08x\n", sl811->port1);
1287 case SetPortFeature:
1288 if (wIndex != 1 || wLength != 0)
1291 case USB_PORT_FEAT_SUSPEND:
1292 if (sl811->port1 & USB_PORT_STAT_RESET)
1294 if (!(sl811->port1 & USB_PORT_STAT_ENABLE))
1297 DBG("suspend...\n");
1298 sl811->ctrl1 &= ~SL11H_CTL1MASK_SOF_ENA;
1299 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1301 case USB_PORT_FEAT_POWER:
1302 port_power(sl811, 1);
1304 case USB_PORT_FEAT_RESET:
1305 if (sl811->port1 & USB_PORT_STAT_SUSPEND)
1307 if (!(sl811->port1 & USB_PORT_STAT_POWER))
1310 /* 50 msec of reset/SE0 signaling, irqs blocked */
1311 sl811->irq_enable = 0;
1312 sl811_write(sl811, SL11H_IRQ_ENABLE,
1314 sl811->ctrl1 = SL11H_CTL1MASK_SE0;
1315 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1316 sl811->port1 |= USB_PORT_STAT_RESET;
1317 mod_timer(&sl811->timer, jiffies
1318 + msecs_to_jiffies(50));
1323 sl811->port1 |= 1 << wValue;
1328 /* "protocol stall" on error */
1332 spin_unlock_irqrestore(&sl811->lock, flags);
1339 sl811h_bus_suspend(struct usb_hcd *hcd)
1342 DBG("%s\n", __func__);
1347 sl811h_bus_resume(struct usb_hcd *hcd)
1350 DBG("%s\n", __func__);
1356 #define sl811h_bus_suspend NULL
1357 #define sl811h_bus_resume NULL
1362 /*-------------------------------------------------------------------------*/
1364 #ifdef STUB_DEBUG_FILE
1366 static inline void create_debug_file(struct sl811 *sl811) { }
1367 static inline void remove_debug_file(struct sl811 *sl811) { }
1371 #include <linux/proc_fs.h>
1372 #include <linux/seq_file.h>
1374 static void dump_irq(struct seq_file *s, char *label, u8 mask)
1376 seq_printf(s, "%s %02x%s%s%s%s%s%s\n", label, mask,
1377 (mask & SL11H_INTMASK_DONE_A) ? " done_a" : "",
1378 (mask & SL11H_INTMASK_DONE_B) ? " done_b" : "",
1379 (mask & SL11H_INTMASK_SOFINTR) ? " sof" : "",
1380 (mask & SL11H_INTMASK_INSRMV) ? " ins/rmv" : "",
1381 (mask & SL11H_INTMASK_RD) ? " rd" : "",
1382 (mask & SL11H_INTMASK_DP) ? " dp" : "");
1385 static int proc_sl811h_show(struct seq_file *s, void *unused)
1387 struct sl811 *sl811 = s->private;
1388 struct sl811h_ep *ep;
1391 seq_printf(s, "%s\n%s version %s\nportstatus[1] = %08x\n",
1392 sl811_to_hcd(sl811)->product_desc,
1393 hcd_name, DRIVER_VERSION,
1396 seq_printf(s, "insert/remove: %ld\n", sl811->stat_insrmv);
1397 seq_printf(s, "current session: done_a %ld done_b %ld "
1398 "wake %ld sof %ld overrun %ld lost %ld\n\n",
1399 sl811->stat_a, sl811->stat_b,
1400 sl811->stat_wake, sl811->stat_sof,
1401 sl811->stat_overrun, sl811->stat_lost);
1403 spin_lock_irq(&sl811->lock);
1405 if (sl811->ctrl1 & SL11H_CTL1MASK_SUSPEND)
1406 seq_printf(s, "(suspended)\n\n");
1408 u8 t = sl811_read(sl811, SL11H_CTLREG1);
1410 seq_printf(s, "ctrl1 %02x%s%s%s%s\n", t,
1411 (t & SL11H_CTL1MASK_SOF_ENA) ? " sofgen" : "",
1412 ({char *s; switch (t & SL11H_CTL1MASK_FORCE) {
1413 case SL11H_CTL1MASK_NORMAL: s = ""; break;
1414 case SL11H_CTL1MASK_SE0: s = " se0/reset"; break;
1415 case SL11H_CTL1MASK_K: s = " k/resume"; break;
1416 default: s = "j"; break;
1418 (t & SL11H_CTL1MASK_LSPD) ? " lowspeed" : "",
1419 (t & SL11H_CTL1MASK_SUSPEND) ? " suspend" : "");
1421 dump_irq(s, "irq_enable",
1422 sl811_read(sl811, SL11H_IRQ_ENABLE));
1423 dump_irq(s, "irq_status",
1424 sl811_read(sl811, SL11H_IRQ_STATUS));
1425 seq_printf(s, "frame clocks remaining: %d\n",
1426 sl811_read(sl811, SL11H_SOFTMRREG) << 6);
1429 seq_printf(s, "A: qh%p ctl %02x sts %02x\n", sl811->active_a,
1430 sl811_read(sl811, SL811_EP_A(SL11H_HOSTCTLREG)),
1431 sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG)));
1432 seq_printf(s, "B: qh%p ctl %02x sts %02x\n", sl811->active_b,
1433 sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG)),
1434 sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG)));
1435 seq_printf(s, "\n");
1436 list_for_each_entry (ep, &sl811->async, schedule) {
1439 seq_printf(s, "%s%sqh%p, ep%d%s, maxpacket %d"
1441 (ep == sl811->active_a) ? "(A) " : "",
1442 (ep == sl811->active_b) ? "(B) " : "",
1444 ({ char *s; switch (ep->nextpid) {
1445 case USB_PID_IN: s = "in"; break;
1446 case USB_PID_OUT: s = "out"; break;
1447 case USB_PID_SETUP: s = "setup"; break;
1448 case USB_PID_ACK: s = "status"; break;
1449 default: s = "?"; break;
1452 ep->nak_count, ep->error_count);
1453 list_for_each_entry (urb, &ep->hep->urb_list, urb_list) {
1454 seq_printf(s, " urb%p, %d/%d\n", urb,
1456 urb->transfer_buffer_length);
1459 if (!list_empty(&sl811->async))
1460 seq_printf(s, "\n");
1462 seq_printf(s, "periodic size= %d\n", PERIODIC_SIZE);
1464 for (i = 0; i < PERIODIC_SIZE; i++) {
1465 ep = sl811->periodic[i];
1468 seq_printf(s, "%2d [%3d]:\n", i, sl811->load[i]);
1470 /* DUMB: prints shared entries multiple times */
1473 " %s%sqh%d/%p (%sdev%d ep%d%s max %d) "
1475 (ep == sl811->active_a) ? "(A) " : "",
1476 (ep == sl811->active_b) ? "(B) " : "",
1478 (ep->udev->speed == USB_SPEED_FULL)
1480 ep->udev->devnum, ep->epnum,
1481 (ep->epnum == 0) ? ""
1482 : ((ep->nextpid == USB_PID_IN)
1485 ep->maxpacket, ep->error_count);
1490 spin_unlock_irq(&sl811->lock);
1491 seq_printf(s, "\n");
1496 static int proc_sl811h_open(struct inode *inode, struct file *file)
1498 return single_open(file, proc_sl811h_show, PDE(inode)->data);
1501 static const struct file_operations proc_ops = {
1502 .open = proc_sl811h_open,
1504 .llseek = seq_lseek,
1505 .release = single_release,
1508 /* expect just one sl811 per system */
1509 static const char proc_filename[] = "driver/sl811h";
1511 static void create_debug_file(struct sl811 *sl811)
1513 sl811->pde = proc_create_data(proc_filename, 0, NULL, &proc_ops, sl811);
1516 static void remove_debug_file(struct sl811 *sl811)
1519 remove_proc_entry(proc_filename, NULL);
1524 /*-------------------------------------------------------------------------*/
1527 sl811h_stop(struct usb_hcd *hcd)
1529 struct sl811 *sl811 = hcd_to_sl811(hcd);
1530 unsigned long flags;
1532 del_timer_sync(&hcd->rh_timer);
1534 spin_lock_irqsave(&sl811->lock, flags);
1535 port_power(sl811, 0);
1536 spin_unlock_irqrestore(&sl811->lock, flags);
1540 sl811h_start(struct usb_hcd *hcd)
1542 struct sl811 *sl811 = hcd_to_sl811(hcd);
1544 /* chip has been reset, VBUS power is off */
1545 hcd->state = HC_STATE_RUNNING;
1548 if (!device_can_wakeup(hcd->self.controller))
1549 device_init_wakeup(hcd->self.controller,
1550 sl811->board->can_wakeup);
1551 hcd->power_budget = sl811->board->power * 2;
1554 /* enable power and interrupts */
1555 port_power(sl811, 1);
1560 /*-------------------------------------------------------------------------*/
1562 static struct hc_driver sl811h_hc_driver = {
1563 .description = hcd_name,
1564 .hcd_priv_size = sizeof(struct sl811),
1567 * generic hardware linkage
1570 .flags = HCD_USB11 | HCD_MEMORY,
1572 /* Basic lifecycle operations */
1573 .start = sl811h_start,
1574 .stop = sl811h_stop,
1577 * managing i/o requests and associated device resources
1579 .urb_enqueue = sl811h_urb_enqueue,
1580 .urb_dequeue = sl811h_urb_dequeue,
1581 .endpoint_disable = sl811h_endpoint_disable,
1584 * periodic schedule support
1586 .get_frame_number = sl811h_get_frame,
1591 .hub_status_data = sl811h_hub_status_data,
1592 .hub_control = sl811h_hub_control,
1593 .bus_suspend = sl811h_bus_suspend,
1594 .bus_resume = sl811h_bus_resume,
1597 /*-------------------------------------------------------------------------*/
1599 static int __devexit
1600 sl811h_remove(struct platform_device *dev)
1602 struct usb_hcd *hcd = platform_get_drvdata(dev);
1603 struct sl811 *sl811 = hcd_to_sl811(hcd);
1604 struct resource *res;
1606 remove_debug_file(sl811);
1607 usb_remove_hcd(hcd);
1609 /* some platforms may use IORESOURCE_IO */
1610 res = platform_get_resource(dev, IORESOURCE_MEM, 1);
1612 iounmap(sl811->data_reg);
1614 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
1616 iounmap(sl811->addr_reg);
1622 static int __devinit
1623 sl811h_probe(struct platform_device *dev)
1625 struct usb_hcd *hcd;
1626 struct sl811 *sl811;
1627 struct resource *addr, *data, *ires;
1629 void __iomem *addr_reg;
1630 void __iomem *data_reg;
1633 unsigned long irqflags;
1638 /* basic sanity checks first. board-specific init logic should
1639 * have initialized these three resources and probably board
1640 * specific platform_data. we don't probe for IRQs, and do only
1641 * minimal sanity checking.
1643 ires = platform_get_resource(dev, IORESOURCE_IRQ, 0);
1644 if (dev->num_resources < 3 || !ires)
1648 irqflags = ires->flags & IRQF_TRIGGER_MASK;
1650 /* refuse to confuse usbcore */
1651 if (dev->dev.dma_mask) {
1652 DBG("no we won't dma\n");
1656 /* the chip may be wired for either kind of addressing */
1657 addr = platform_get_resource(dev, IORESOURCE_MEM, 0);
1658 data = platform_get_resource(dev, IORESOURCE_MEM, 1);
1660 if (!addr || !data) {
1661 addr = platform_get_resource(dev, IORESOURCE_IO, 0);
1662 data = platform_get_resource(dev, IORESOURCE_IO, 1);
1667 * NOTE: 64-bit resource->start is getting truncated
1668 * to avoid compiler warning, assuming that ->start
1669 * is always 32-bit for this case
1671 addr_reg = (void __iomem *) (unsigned long) addr->start;
1672 data_reg = (void __iomem *) (unsigned long) data->start;
1674 addr_reg = ioremap(addr->start, 1);
1675 if (addr_reg == NULL) {
1680 data_reg = ioremap(data->start, 1);
1681 if (data_reg == NULL) {
1687 /* allocate and initialize hcd */
1688 hcd = usb_create_hcd(&sl811h_hc_driver, &dev->dev, dev_name(&dev->dev));
1693 hcd->rsrc_start = addr->start;
1694 sl811 = hcd_to_sl811(hcd);
1696 spin_lock_init(&sl811->lock);
1697 INIT_LIST_HEAD(&sl811->async);
1698 sl811->board = dev->dev.platform_data;
1699 init_timer(&sl811->timer);
1700 sl811->timer.function = sl811h_timer;
1701 sl811->timer.data = (unsigned long) sl811;
1702 sl811->addr_reg = addr_reg;
1703 sl811->data_reg = data_reg;
1705 spin_lock_irq(&sl811->lock);
1706 port_power(sl811, 0);
1707 spin_unlock_irq(&sl811->lock);
1710 tmp = sl811_read(sl811, SL11H_HWREVREG);
1713 hcd->product_desc = "SL811HS v1.2";
1716 hcd->product_desc = "SL811HS v1.5";
1719 /* reject case 0, SL11S is less functional */
1720 DBG("chiprev %02x\n", tmp);
1725 /* The chip's IRQ is level triggered, active high. A requirement
1726 * for platform device setup is to cope with things like signal
1727 * inverters (e.g. CF is active low) or working only with edge
1728 * triggers (e.g. most ARM CPUs). Initial driver stress testing
1729 * was on a system with single edge triggering, so most sorts of
1730 * triggering arrangement should work.
1732 * Use resource IRQ flags if set by platform device setup.
1734 irqflags |= IRQF_SHARED;
1735 retval = usb_add_hcd(hcd, irq, irqflags);
1739 create_debug_file(sl811);
1751 DBG("init error, %d\n", retval);
1757 /* for this device there's no useful distinction between the controller
1758 * and its root hub, except that the root hub only gets direct PM calls
1759 * when CONFIG_USB_SUSPEND is enabled.
1763 sl811h_suspend(struct platform_device *dev, pm_message_t state)
1765 struct usb_hcd *hcd = platform_get_drvdata(dev);
1766 struct sl811 *sl811 = hcd_to_sl811(hcd);
1769 switch (state.event) {
1770 case PM_EVENT_FREEZE:
1771 retval = sl811h_bus_suspend(hcd);
1773 case PM_EVENT_SUSPEND:
1774 case PM_EVENT_HIBERNATE:
1775 case PM_EVENT_PRETHAW: /* explicitly discard hw state */
1776 port_power(sl811, 0);
1783 sl811h_resume(struct platform_device *dev)
1785 struct usb_hcd *hcd = platform_get_drvdata(dev);
1786 struct sl811 *sl811 = hcd_to_sl811(hcd);
1788 /* with no "check to see if VBUS is still powered" board hook,
1789 * let's assume it'd only be powered to enable remote wakeup.
1791 if (!sl811->port1 || !device_can_wakeup(&hcd->self.root_hub->dev)) {
1793 port_power(sl811, 1);
1794 usb_root_hub_lost_power(hcd->self.root_hub);
1798 return sl811h_bus_resume(hcd);
1803 #define sl811h_suspend NULL
1804 #define sl811h_resume NULL
1809 /* this driver is exported so sl811_cs can depend on it */
1810 struct platform_driver sl811h_driver = {
1811 .probe = sl811h_probe,
1812 .remove = __devexit_p(sl811h_remove),
1814 .suspend = sl811h_suspend,
1815 .resume = sl811h_resume,
1817 .name = (char *) hcd_name,
1818 .owner = THIS_MODULE,
1821 EXPORT_SYMBOL(sl811h_driver);
1823 module_platform_driver(sl811h_driver);