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/platform_device.h>
52 #include <asm/system.h>
53 #include <asm/byteorder.h>
55 #include "../core/hcd.h"
59 MODULE_DESCRIPTION("SL811HS USB Host Controller Driver");
60 MODULE_LICENSE("GPL");
62 #define DRIVER_VERSION "19 May 2005"
66 # define STUB_DEBUG_FILE
69 /* for now, use only one transfer register bank */
72 /* this doesn't understand urb->iso_frame_desc[], but if you had a driver
73 * that just queued one ISO frame per URB then iso transfers "should" work
74 * using the normal urb status fields.
81 static const char hcd_name[] = "sl811-hcd";
83 /*-------------------------------------------------------------------------*/
85 static void port_power(struct sl811 *sl811, int is_on)
87 struct usb_hcd *hcd = sl811_to_hcd(sl811);
89 /* hub is inactive unless the port is powered */
91 if (sl811->port1 & (1 << USB_PORT_FEAT_POWER))
94 sl811->port1 = (1 << USB_PORT_FEAT_POWER);
95 sl811->irq_enable = SL11H_INTMASK_INSRMV;
96 hcd->self.controller->power.power_state = PMSG_ON;
99 sl811->irq_enable = 0;
100 hcd->state = HC_STATE_HALT;
101 hcd->self.controller->power.power_state = PMSG_SUSPEND;
104 sl811_write(sl811, SL11H_IRQ_ENABLE, 0);
105 sl811_write(sl811, SL11H_IRQ_STATUS, ~0);
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);
113 /* reset as thoroughly as we can */
114 if (sl811->board && sl811->board->reset)
115 sl811->board->reset(hcd->self.controller);
117 sl811_write(sl811, SL11H_CTLREG1, SL11H_CTL1MASK_SE0);
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);
126 // if !is_on, put into lowpower mode now
129 /*-------------------------------------------------------------------------*/
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.
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.
139 /* SETUP starts a new control request. Devices are not allowed to
140 * STALL or NAK these; they must cancel any pending control requests.
142 static void setup_packet(
144 struct sl811h_ep *ep,
152 void __iomem *data_reg;
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);
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);
165 /* always OUT/data0 */ ;
166 sl811_write(sl811, bank + SL11H_HOSTCTLREG,
167 control | SL11H_HCTLMASK_OUT);
169 PACKET("SETUP qh%p\n", ep);
172 /* STATUS finishes control requests, often after IN or OUT data packets */
173 static void status_packet(
175 struct sl811h_ep *ep,
182 void __iomem *data_reg;
184 do_out = urb->transfer_buffer_length && usb_pipein(urb->pipe);
185 data_reg = sl811->data_reg;
187 /* autoincrementing */
188 sl811_write(sl811, bank + SL11H_BUFADDRREG, 0);
190 writeb((do_out ? SL_OUT : SL_IN) /* | ep->epnum */, data_reg);
191 writeb(usb_pipedevice(urb->pipe), data_reg);
193 /* always data1; sometimes IN */
194 control |= SL11H_HCTLMASK_TOGGLE;
196 control |= SL11H_HCTLMASK_OUT;
197 sl811_write(sl811, bank + SL11H_HOSTCTLREG, control);
199 PACKET("STATUS%s/%s qh%p\n", ep->nak_count ? "/retry" : "",
200 do_out ? "out" : "in", ep);
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...
207 static void in_packet(
209 struct sl811h_ep *ep,
217 void __iomem *data_reg;
219 /* avoid losing data on overflow */
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;
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);
233 sl811_write(sl811, bank + SL11H_HOSTCTLREG, control);
234 ep->length = min((int)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);
240 /* OUT packets can be used with any type of endpoint.
241 * urb->iso_frame_desc is currently ignored here...
243 static void out_packet(
245 struct sl811h_ep *ep,
254 void __iomem *data_reg;
256 buf = urb->transfer_buffer + urb->actual_length;
259 len = min((int)ep->maxpacket,
260 urb->transfer_buffer_length - urb->actual_length);
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;
268 sl811_write_buf(sl811, addr, buf, len);
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);
276 sl811_write(sl811, bank + SL11H_HOSTCTLREG,
277 control | SL11H_HCTLMASK_OUT);
279 PACKET("OUT%s/%d qh%p len%d\n", ep->nak_count ? "/retry" : "",
280 !!usb_gettoggle(urb->dev, ep->epnum, 1), ep, len);
283 /*-------------------------------------------------------------------------*/
285 /* caller updates on-chip enables later */
287 static inline void sofirq_on(struct sl811 *sl811)
289 if (sl811->irq_enable & SL11H_INTMASK_SOFINTR)
291 VDBG("sof irq on\n");
292 sl811->irq_enable |= SL11H_INTMASK_SOFINTR;
295 static inline void sofirq_off(struct sl811 *sl811)
297 if (!(sl811->irq_enable & SL11H_INTMASK_SOFINTR))
299 VDBG("sof irq off\n");
300 sl811->irq_enable &= ~SL11H_INTMASK_SOFINTR;
303 /*-------------------------------------------------------------------------*/
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.
310 static struct sl811h_ep *start(struct sl811 *sl811, u8 bank)
312 struct sl811h_ep *ep;
317 /* use endpoint at schedule head */
318 if (sl811->next_periodic) {
319 ep = sl811->next_periodic;
320 sl811->next_periodic = ep->next;
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);
328 /* could set up the first fullspeed periodic
329 * transfer for the next frame ...
335 if ((bank && sl811->active_b == ep) || sl811->active_a == ep)
339 if (ep->schedule.next == &sl811->async)
340 sl811->next_async = NULL;
342 sl811->next_async = container_of(ep->schedule.next,
343 struct sl811h_ep, schedule);
346 if (unlikely(list_empty(&ep->hep->urb_list))) {
347 DBG("empty %p queue?\n", ep);
351 urb = container_of(ep->hep->urb_list.next, struct urb, urb_list);
352 control = ep->defctrl;
354 /* if this frame doesn't have enough time left to transfer this
355 * packet, wait till the next frame. too-simple algorithm...
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 */
364 fclock -= ep->maxpacket << 8;
366 /* erratum 2: AFTERSOF only works for fullspeed */
369 sl811->stat_overrun++;
374 fclock -= 12000 / 19; /* 19 64byte packets/msec */
377 sl811->stat_overrun++;
378 control |= SL11H_HCTLMASK_AFTERSOF;
380 /* throttle bulk/control irq noise */
381 } else if (ep->nak_count)
382 control |= SL11H_HCTLMASK_AFTERSOF;
386 switch (ep->nextpid) {
388 in_packet(sl811, ep, urb, bank, control);
391 out_packet(sl811, ep, urb, bank, control);
394 setup_packet(sl811, ep, urb, bank, control);
396 case USB_PID_ACK: /* for control status */
397 status_packet(sl811, ep, urb, bank, control);
400 DBG("bad ep%p pid %02x\n", ep, ep->nextpid);
406 #define MIN_JIFFIES ((msecs_to_jiffies(2) > 1) ? msecs_to_jiffies(2) : 2)
408 static inline void start_transfer(struct sl811 *sl811)
410 if (sl811->port1 & (1 << USB_PORT_FEAT_SUSPEND))
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;
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;
426 static void finish_request(
428 struct sl811h_ep *ep,
431 ) __releases(sl811->lock) __acquires(sl811->lock)
435 if (usb_pipecontrol(urb->pipe))
436 ep->nextpid = USB_PID_SETUP;
438 spin_lock(&urb->lock);
439 urb->status = status;
440 spin_unlock(&urb->lock);
442 usb_hcd_unlink_urb_from_ep(sl811_to_hcd(sl811), urb);
443 spin_unlock(&sl811->lock);
444 usb_hcd_giveback_urb(sl811_to_hcd(sl811), urb);
445 spin_lock(&sl811->lock);
447 /* leave active endpoints in the schedule */
448 if (!list_empty(&ep->hep->urb_list))
451 /* async deschedule? */
452 if (!list_empty(&ep->schedule)) {
453 list_del_init(&ep->schedule);
454 if (ep == sl811->next_async)
455 sl811->next_async = NULL;
459 /* periodic deschedule */
460 DBG("deschedule qh%d/%p branch %d\n", ep->period, ep, ep->branch);
461 for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
462 struct sl811h_ep *temp;
463 struct sl811h_ep **prev = &sl811->periodic[i];
465 while (*prev && ((temp = *prev) != ep))
469 sl811->load[i] -= ep->load;
471 ep->branch = PERIODIC_SIZE;
472 sl811->periodic_count--;
473 sl811_to_hcd(sl811)->self.bandwidth_allocated
474 -= ep->load / ep->period;
475 if (ep == sl811->next_periodic)
476 sl811->next_periodic = ep->next;
478 /* we might turn SOFs back on again for the async schedule */
479 if (sl811->periodic_count == 0)
484 done(struct sl811 *sl811, struct sl811h_ep *ep, u8 bank)
488 int urbstat = -EINPROGRESS;
493 status = sl811_read(sl811, bank + SL11H_PKTSTATREG);
495 urb = container_of(ep->hep->urb_list.next, struct urb, urb_list);
497 /* we can safely ignore NAKs */
498 if (status & SL11H_STATMASK_NAK) {
499 // PACKET("...NAK_%02x qh%p\n", bank, ep);
504 /* ACK advances transfer, toggle, and maybe queue */
505 } else if (status & SL11H_STATMASK_ACK) {
506 struct usb_device *udev = urb->dev;
510 /* urb->iso_frame_desc is currently ignored here... */
512 ep->nak_count = ep->error_count = 0;
513 switch (ep->nextpid) {
515 // PACKET("...ACK/out_%02x qh%p\n", bank, ep);
516 urb->actual_length += ep->length;
517 usb_dotoggle(udev, ep->epnum, 1);
518 if (urb->actual_length
519 == urb->transfer_buffer_length) {
520 if (usb_pipecontrol(urb->pipe))
521 ep->nextpid = USB_PID_ACK;
523 /* some bulk protocols terminate OUT transfers
524 * by a short packet, using ZLPs not padding.
526 else if (ep->length < ep->maxpacket
527 || !(urb->transfer_flags
533 // PACKET("...ACK/in_%02x qh%p\n", bank, ep);
534 buf = urb->transfer_buffer + urb->actual_length;
536 len = ep->maxpacket - sl811_read(sl811,
537 bank + SL11H_XFERCNTREG);
538 if (len > ep->length) {
540 urb->status = -EOVERFLOW;
542 urb->actual_length += len;
543 sl811_read_buf(sl811, SL811HS_PACKET_BUF(bank == 0),
545 usb_dotoggle(udev, ep->epnum, 0);
546 if (urb->actual_length == urb->transfer_buffer_length
547 || len < ep->maxpacket)
549 if (usb_pipecontrol(urb->pipe) && urbstat == 0) {
551 /* NOTE if the status stage STALLs (why?),
552 * this reports the wrong urb status.
554 spin_lock(&urb->lock);
555 if (urb->status == -EINPROGRESS)
556 urb->status = urbstat;
557 spin_unlock(&urb->lock);
560 ep->nextpid = USB_PID_ACK;
564 // PACKET("...ACK/setup_%02x qh%p\n", bank, ep);
565 if (urb->transfer_buffer_length == urb->actual_length)
566 ep->nextpid = USB_PID_ACK;
567 else if (usb_pipeout(urb->pipe)) {
568 usb_settoggle(udev, 0, 1, 1);
569 ep->nextpid = USB_PID_OUT;
571 usb_settoggle(udev, 0, 0, 1);
572 ep->nextpid = USB_PID_IN;
576 // PACKET("...ACK/status_%02x qh%p\n", bank, ep);
581 /* STALL stops all transfers */
582 } else if (status & SL11H_STATMASK_STALL) {
583 PACKET("...STALL_%02x qh%p\n", bank, ep);
584 ep->nak_count = ep->error_count = 0;
587 /* error? retry, until "3 strikes" */
588 } else if (++ep->error_count >= 3) {
589 if (status & SL11H_STATMASK_TMOUT)
591 else if (status & SL11H_STATMASK_OVF)
592 urbstat = -EOVERFLOW;
596 PACKET("...3STRIKES_%02x %02x qh%p stat %d\n",
597 bank, status, ep, urbstat);
600 if (urb && (urbstat != -EINPROGRESS || urb->unlinked))
601 finish_request(sl811, ep, urb, urbstat);
604 static inline u8 checkdone(struct sl811 *sl811)
609 if (sl811->active_a && time_before_eq(sl811->jiffies_a, jiffies)) {
610 ctl = sl811_read(sl811, SL811_EP_A(SL11H_HOSTCTLREG));
611 if (ctl & SL11H_HCTLMASK_ARM)
612 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0);
613 DBG("%s DONE_A: ctrl %02x sts %02x\n",
614 (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost",
616 sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG)));
617 irqstat |= SL11H_INTMASK_DONE_A;
620 if (sl811->active_b && time_before_eq(sl811->jiffies_b, jiffies)) {
621 ctl = sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG));
622 if (ctl & SL11H_HCTLMASK_ARM)
623 sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0);
624 DBG("%s DONE_B: ctrl %02x sts %02x\n",
625 (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost",
627 sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG)));
628 irqstat |= SL11H_INTMASK_DONE_A;
634 static irqreturn_t sl811h_irq(struct usb_hcd *hcd)
636 struct sl811 *sl811 = hcd_to_sl811(hcd);
638 irqreturn_t ret = IRQ_NONE;
639 unsigned retries = 5;
641 spin_lock(&sl811->lock);
644 irqstat = sl811_read(sl811, SL11H_IRQ_STATUS) & ~SL11H_INTMASK_DP;
646 sl811_write(sl811, SL11H_IRQ_STATUS, irqstat);
647 irqstat &= sl811->irq_enable;
651 /* this may no longer be necessary ... */
653 irqstat = checkdone(sl811);
659 /* USB packets, not necessarily handled in the order they're
660 * issued ... that's fine if they're different endpoints.
662 if (irqstat & SL11H_INTMASK_DONE_A) {
663 done(sl811, sl811->active_a, SL811_EP_A(SL811_HOST_BUF));
664 sl811->active_a = NULL;
668 if (irqstat & SL11H_INTMASK_DONE_B) {
669 done(sl811, sl811->active_b, SL811_EP_B(SL811_HOST_BUF));
670 sl811->active_b = NULL;
674 if (irqstat & SL11H_INTMASK_SOFINTR) {
677 index = sl811->frame++ % (PERIODIC_SIZE - 1);
680 /* be graceful about almost-inevitable periodic schedule
681 * overruns: continue the previous frame's transfers iff
682 * this one has nothing scheduled.
684 if (sl811->next_periodic) {
685 // ERR("overrun to slot %d\n", index);
686 sl811->stat_overrun++;
688 if (sl811->periodic[index])
689 sl811->next_periodic = sl811->periodic[index];
692 /* khubd manages debouncing and wakeup */
693 if (irqstat & SL11H_INTMASK_INSRMV) {
694 sl811->stat_insrmv++;
696 /* most stats are reset for each VBUS session */
697 sl811->stat_wake = 0;
701 sl811->stat_lost = 0;
704 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
706 sl811->irq_enable = SL11H_INTMASK_INSRMV;
707 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
709 /* usbcore nukes other pending transactions on disconnect */
710 if (sl811->active_a) {
711 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0);
712 finish_request(sl811, sl811->active_a,
713 container_of(sl811->active_a
714 ->hep->urb_list.next,
715 struct urb, urb_list),
717 sl811->active_a = NULL;
720 if (sl811->active_b) {
721 sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0);
722 finish_request(sl811, sl811->active_b,
723 container_of(sl811->active_b
724 ->hep->urb_list.next,
725 struct urb, urb_list),
727 sl811->active_b = NULL;
731 /* port status seems weird until after reset, so
732 * force the reset and make khubd clean up later.
734 sl811->port1 |= (1 << USB_PORT_FEAT_C_CONNECTION)
735 | (1 << USB_PORT_FEAT_CONNECTION);
737 } else if (irqstat & SL11H_INTMASK_RD) {
738 if (sl811->port1 & (1 << USB_PORT_FEAT_SUSPEND)) {
740 sl811->port1 |= 1 << USB_PORT_FEAT_C_SUSPEND;
743 irqstat &= ~SL11H_INTMASK_RD;
747 if (sl811->port1 & (1 << USB_PORT_FEAT_ENABLE))
748 start_transfer(sl811);
754 if (sl811->periodic_count == 0 && list_empty(&sl811->async))
756 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
758 spin_unlock(&sl811->lock);
763 /*-------------------------------------------------------------------------*/
765 /* usb 1.1 says max 90% of a frame is available for periodic transfers.
766 * this driver doesn't promise that much since it's got to handle an
767 * IRQ per packet; irq handling latencies also use up that time.
769 * NOTE: the periodic schedule is a sparse tree, with the load for
770 * each branch minimized. see fig 3.5 in the OHCI spec for example.
772 #define MAX_PERIODIC_LOAD 500 /* out of 1000 usec */
774 static int balance(struct sl811 *sl811, u16 period, u16 load)
776 int i, branch = -ENOSPC;
778 /* search for the least loaded schedule branch of that period
779 * which has enough bandwidth left unreserved.
781 for (i = 0; i < period ; i++) {
782 if (branch < 0 || sl811->load[branch] > sl811->load[i]) {
785 for (j = i; j < PERIODIC_SIZE; j += period) {
786 if ((sl811->load[j] + load)
790 if (j < PERIODIC_SIZE)
798 /*-------------------------------------------------------------------------*/
800 static int sl811h_urb_enqueue(
805 struct sl811 *sl811 = hcd_to_sl811(hcd);
806 struct usb_device *udev = urb->dev;
807 unsigned int pipe = urb->pipe;
808 int is_out = !usb_pipein(pipe);
809 int type = usb_pipetype(pipe);
810 int epnum = usb_pipeendpoint(pipe);
811 struct sl811h_ep *ep = NULL;
815 struct usb_host_endpoint *hep = urb->ep;
818 if (type == PIPE_ISOCHRONOUS)
822 /* avoid all allocations within spinlocks */
824 ep = kzalloc(sizeof *ep, mem_flags);
826 spin_lock_irqsave(&sl811->lock, flags);
828 /* don't submit to a dead or disabled port */
829 if (!(sl811->port1 & (1 << USB_PORT_FEAT_ENABLE))
830 || !HC_IS_RUNNING(hcd->state)) {
833 goto fail_not_linked;
835 retval = usb_hcd_link_urb_to_ep(hcd, urb);
838 goto fail_not_linked;
849 INIT_LIST_HEAD(&ep->schedule);
852 ep->maxpacket = usb_maxpacket(udev, urb->pipe, is_out);
853 ep->defctrl = SL11H_HCTLMASK_ARM | SL11H_HCTLMASK_ENABLE;
854 usb_settoggle(udev, epnum, is_out, 0);
856 if (type == PIPE_CONTROL)
857 ep->nextpid = USB_PID_SETUP;
859 ep->nextpid = USB_PID_OUT;
861 ep->nextpid = USB_PID_IN;
863 if (ep->maxpacket > H_MAXPACKET) {
864 /* iso packets up to 240 bytes could work... */
865 DBG("dev %d ep%d maxpacket %d\n",
866 udev->devnum, epnum, ep->maxpacket);
871 if (udev->speed == USB_SPEED_LOW) {
872 /* send preamble for external hub? */
873 if (!(sl811->ctrl1 & SL11H_CTL1MASK_LSPD))
874 ep->defctrl |= SL11H_HCTLMASK_PREAMBLE;
877 case PIPE_ISOCHRONOUS:
879 if (urb->interval > PERIODIC_SIZE)
880 urb->interval = PERIODIC_SIZE;
881 ep->period = urb->interval;
882 ep->branch = PERIODIC_SIZE;
883 if (type == PIPE_ISOCHRONOUS)
884 ep->defctrl |= SL11H_HCTLMASK_ISOCH;
885 ep->load = usb_calc_bus_time(udev->speed, !is_out,
886 (type == PIPE_ISOCHRONOUS),
887 usb_maxpacket(udev, pipe, is_out))
896 /* maybe put endpoint into schedule */
900 if (list_empty(&ep->schedule))
901 list_add_tail(&ep->schedule, &sl811->async);
903 case PIPE_ISOCHRONOUS:
905 urb->interval = ep->period;
906 if (ep->branch < PERIODIC_SIZE) {
907 /* NOTE: the phase is correct here, but the value
908 * needs offsetting by the transfer queue depth.
909 * All current drivers ignore start_frame, so this
910 * is unlikely to ever matter...
912 urb->start_frame = (sl811->frame & (PERIODIC_SIZE - 1))
917 retval = balance(sl811, ep->period, ep->load);
922 urb->start_frame = (sl811->frame & (PERIODIC_SIZE - 1))
925 /* sort each schedule branch by period (slow before fast)
926 * to share the faster parts of the tree without needing
927 * dummy/placeholder nodes
929 DBG("schedule qh%d/%p branch %d\n", ep->period, ep, ep->branch);
930 for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
931 struct sl811h_ep **prev = &sl811->periodic[i];
932 struct sl811h_ep *here = *prev;
934 while (here && ep != here) {
935 if (ep->period > here->period)
944 sl811->load[i] += ep->load;
946 sl811->periodic_count++;
947 hcd->self.bandwidth_allocated += ep->load / ep->period;
952 start_transfer(sl811);
953 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
956 usb_hcd_unlink_urb_from_ep(hcd, urb);
958 spin_unlock_irqrestore(&sl811->lock, flags);
962 static int sl811h_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
964 struct sl811 *sl811 = hcd_to_sl811(hcd);
965 struct usb_host_endpoint *hep;
967 struct sl811h_ep *ep;
970 spin_lock_irqsave(&sl811->lock, flags);
971 retval = usb_hcd_check_unlink_urb(hcd, urb, status);
978 /* finish right away if this urb can't be active ...
979 * note that some drivers wrongly expect delays
981 if (ep->hep->urb_list.next != &urb->urb_list) {
982 /* not front of queue? never active */
984 /* for active transfers, we expect an IRQ */
985 } else if (sl811->active_a == ep) {
986 if (time_before_eq(sl811->jiffies_a, jiffies)) {
987 /* happens a lot with lowspeed?? */
988 DBG("giveup on DONE_A: ctrl %02x sts %02x\n",
990 SL811_EP_A(SL11H_HOSTCTLREG)),
992 SL811_EP_A(SL11H_PKTSTATREG)));
993 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG),
995 sl811->active_a = NULL;
999 } else if (sl811->active_b == ep) {
1000 if (time_before_eq(sl811->jiffies_a, jiffies)) {
1001 /* happens a lot with lowspeed?? */
1002 DBG("giveup on DONE_B: ctrl %02x sts %02x\n",
1004 SL811_EP_B(SL11H_HOSTCTLREG)),
1006 SL811_EP_B(SL11H_PKTSTATREG)));
1007 sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG),
1009 sl811->active_b = NULL;
1014 /* front of queue for inactive endpoint */
1018 finish_request(sl811, ep, urb, 0);
1020 VDBG("dequeue, urb %p active %s; wait4irq\n", urb,
1021 (sl811->active_a == ep) ? "A" : "B");
1025 spin_unlock_irqrestore(&sl811->lock, flags);
1030 sl811h_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *hep)
1032 struct sl811h_ep *ep = hep->hcpriv;
1037 /* assume we'd just wait for the irq */
1038 if (!list_empty(&hep->urb_list))
1040 if (!list_empty(&hep->urb_list))
1041 WARN("ep %p not empty?\n", ep);
1048 sl811h_get_frame(struct usb_hcd *hcd)
1050 struct sl811 *sl811 = hcd_to_sl811(hcd);
1052 /* wrong except while periodic transfers are scheduled;
1053 * never matches the on-the-wire frame;
1054 * subject to overruns.
1056 return sl811->frame;
1060 /*-------------------------------------------------------------------------*/
1062 /* the virtual root hub timer IRQ checks for hub status */
1064 sl811h_hub_status_data(struct usb_hcd *hcd, char *buf)
1066 struct sl811 *sl811 = hcd_to_sl811(hcd);
1068 unsigned long flags;
1070 /* non-SMP HACK: use root hub timer as i/o watchdog
1071 * this seems essential when SOF IRQs aren't in use...
1073 local_irq_save(flags);
1074 if (!timer_pending(&sl811->timer)) {
1075 if (sl811h_irq( /* ~0, */ hcd) != IRQ_NONE)
1078 local_irq_restore(flags);
1081 if (!(sl811->port1 & (0xffff << 16)))
1084 /* tell khubd port 1 changed */
1090 sl811h_hub_descriptor (
1091 struct sl811 *sl811,
1092 struct usb_hub_descriptor *desc
1096 desc->bDescriptorType = 0x29;
1097 desc->bHubContrCurrent = 0;
1099 desc->bNbrPorts = 1;
1100 desc->bDescLength = 9;
1102 /* per-port power switching (gang of one!), or none */
1103 desc->bPwrOn2PwrGood = 0;
1104 if (sl811->board && sl811->board->port_power) {
1105 desc->bPwrOn2PwrGood = sl811->board->potpg;
1106 if (!desc->bPwrOn2PwrGood)
1107 desc->bPwrOn2PwrGood = 10;
1112 /* no overcurrent errors detection/handling */
1115 desc->wHubCharacteristics = (__force __u16)cpu_to_le16(temp);
1117 /* two bitmaps: ports removable, and legacy PortPwrCtrlMask */
1118 desc->bitmap[0] = 0 << 1;
1119 desc->bitmap[1] = ~0;
1123 sl811h_timer(unsigned long _sl811)
1125 struct sl811 *sl811 = (void *) _sl811;
1126 unsigned long flags;
1128 u8 signaling = sl811->ctrl1 & SL11H_CTL1MASK_FORCE;
1129 const u32 mask = (1 << USB_PORT_FEAT_CONNECTION)
1130 | (1 << USB_PORT_FEAT_ENABLE)
1131 | (1 << USB_PORT_FEAT_LOWSPEED);
1133 spin_lock_irqsave(&sl811->lock, flags);
1135 /* stop special signaling */
1136 sl811->ctrl1 &= ~SL11H_CTL1MASK_FORCE;
1137 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1140 irqstat = sl811_read(sl811, SL11H_IRQ_STATUS);
1142 switch (signaling) {
1143 case SL11H_CTL1MASK_SE0:
1145 sl811->port1 = (1 << USB_PORT_FEAT_C_RESET)
1146 | (1 << USB_PORT_FEAT_POWER);
1148 /* don't wrongly ack RD */
1149 if (irqstat & SL11H_INTMASK_INSRMV)
1150 irqstat &= ~SL11H_INTMASK_RD;
1152 case SL11H_CTL1MASK_K:
1153 DBG("end resume\n");
1154 sl811->port1 &= ~(1 << USB_PORT_FEAT_SUSPEND);
1157 DBG("odd timer signaling: %02x\n", signaling);
1160 sl811_write(sl811, SL11H_IRQ_STATUS, irqstat);
1162 if (irqstat & SL11H_INTMASK_RD) {
1163 /* usbcore nukes all pending transactions on disconnect */
1164 if (sl811->port1 & (1 << USB_PORT_FEAT_CONNECTION))
1165 sl811->port1 |= (1 << USB_PORT_FEAT_C_CONNECTION)
1166 | (1 << USB_PORT_FEAT_C_ENABLE);
1167 sl811->port1 &= ~mask;
1168 sl811->irq_enable = SL11H_INTMASK_INSRMV;
1170 sl811->port1 |= mask;
1171 if (irqstat & SL11H_INTMASK_DP)
1172 sl811->port1 &= ~(1 << USB_PORT_FEAT_LOWSPEED);
1173 sl811->irq_enable = SL11H_INTMASK_INSRMV | SL11H_INTMASK_RD;
1176 if (sl811->port1 & (1 << USB_PORT_FEAT_CONNECTION)) {
1177 u8 ctrl2 = SL811HS_CTL2_INIT;
1179 sl811->irq_enable |= SL11H_INTMASK_DONE_A;
1181 sl811->irq_enable |= SL11H_INTMASK_DONE_B;
1183 if (sl811->port1 & (1 << USB_PORT_FEAT_LOWSPEED)) {
1184 sl811->ctrl1 |= SL11H_CTL1MASK_LSPD;
1185 ctrl2 |= SL811HS_CTL2MASK_DSWAP;
1188 /* start SOFs flowing, kickstarting with A registers */
1189 sl811->ctrl1 |= SL11H_CTL1MASK_SOF_ENA;
1190 sl811_write(sl811, SL11H_SOFLOWREG, 0xe0);
1191 sl811_write(sl811, SL811HS_CTLREG2, ctrl2);
1193 /* autoincrementing */
1194 sl811_write(sl811, SL811_EP_A(SL11H_BUFLNTHREG), 0);
1195 writeb(SL_SOF, sl811->data_reg);
1196 writeb(0, sl811->data_reg);
1197 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG),
1198 SL11H_HCTLMASK_ARM);
1200 /* khubd provides debounce delay */
1204 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1207 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
1208 spin_unlock_irqrestore(&sl811->lock, flags);
1213 struct usb_hcd *hcd,
1220 struct sl811 *sl811 = hcd_to_sl811(hcd);
1222 unsigned long flags;
1224 spin_lock_irqsave(&sl811->lock, flags);
1227 case ClearHubFeature:
1230 case C_HUB_OVER_CURRENT:
1231 case C_HUB_LOCAL_POWER:
1237 case ClearPortFeature:
1238 if (wIndex != 1 || wLength != 0)
1242 case USB_PORT_FEAT_ENABLE:
1243 sl811->port1 &= (1 << USB_PORT_FEAT_POWER);
1245 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1246 sl811->irq_enable = SL11H_INTMASK_INSRMV;
1247 sl811_write(sl811, SL11H_IRQ_ENABLE,
1250 case USB_PORT_FEAT_SUSPEND:
1251 if (!(sl811->port1 & (1 << USB_PORT_FEAT_SUSPEND)))
1254 /* 20 msec of resume/K signaling, other irqs blocked */
1255 DBG("start resume...\n");
1256 sl811->irq_enable = 0;
1257 sl811_write(sl811, SL11H_IRQ_ENABLE,
1259 sl811->ctrl1 |= SL11H_CTL1MASK_K;
1260 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1262 mod_timer(&sl811->timer, jiffies
1263 + msecs_to_jiffies(20));
1265 case USB_PORT_FEAT_POWER:
1266 port_power(sl811, 0);
1268 case USB_PORT_FEAT_C_ENABLE:
1269 case USB_PORT_FEAT_C_SUSPEND:
1270 case USB_PORT_FEAT_C_CONNECTION:
1271 case USB_PORT_FEAT_C_OVER_CURRENT:
1272 case USB_PORT_FEAT_C_RESET:
1277 sl811->port1 &= ~(1 << wValue);
1279 case GetHubDescriptor:
1280 sl811h_hub_descriptor(sl811, (struct usb_hub_descriptor *) buf);
1283 *(__le32 *) buf = cpu_to_le32(0);
1288 *(__le32 *) buf = cpu_to_le32(sl811->port1);
1291 if (*(u16*)(buf+2)) /* only if wPortChange is interesting */
1293 DBG("GetPortStatus %08x\n", sl811->port1);
1295 case SetPortFeature:
1296 if (wIndex != 1 || wLength != 0)
1299 case USB_PORT_FEAT_SUSPEND:
1300 if (sl811->port1 & (1 << USB_PORT_FEAT_RESET))
1302 if (!(sl811->port1 & (1 << USB_PORT_FEAT_ENABLE)))
1305 DBG("suspend...\n");
1306 sl811->ctrl1 &= ~SL11H_CTL1MASK_SOF_ENA;
1307 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1309 case USB_PORT_FEAT_POWER:
1310 port_power(sl811, 1);
1312 case USB_PORT_FEAT_RESET:
1313 if (sl811->port1 & (1 << USB_PORT_FEAT_SUSPEND))
1315 if (!(sl811->port1 & (1 << USB_PORT_FEAT_POWER)))
1318 /* 50 msec of reset/SE0 signaling, irqs blocked */
1319 sl811->irq_enable = 0;
1320 sl811_write(sl811, SL11H_IRQ_ENABLE,
1322 sl811->ctrl1 = SL11H_CTL1MASK_SE0;
1323 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1324 sl811->port1 |= (1 << USB_PORT_FEAT_RESET);
1325 mod_timer(&sl811->timer, jiffies
1326 + msecs_to_jiffies(50));
1331 sl811->port1 |= 1 << wValue;
1336 /* "protocol stall" on error */
1340 spin_unlock_irqrestore(&sl811->lock, flags);
1347 sl811h_bus_suspend(struct usb_hcd *hcd)
1350 DBG("%s\n", __FUNCTION__);
1355 sl811h_bus_resume(struct usb_hcd *hcd)
1358 DBG("%s\n", __FUNCTION__);
1364 #define sl811h_bus_suspend NULL
1365 #define sl811h_bus_resume NULL
1370 /*-------------------------------------------------------------------------*/
1372 #ifdef STUB_DEBUG_FILE
1374 static inline void create_debug_file(struct sl811 *sl811) { }
1375 static inline void remove_debug_file(struct sl811 *sl811) { }
1379 #include <linux/proc_fs.h>
1380 #include <linux/seq_file.h>
1382 static void dump_irq(struct seq_file *s, char *label, u8 mask)
1384 seq_printf(s, "%s %02x%s%s%s%s%s%s\n", label, mask,
1385 (mask & SL11H_INTMASK_DONE_A) ? " done_a" : "",
1386 (mask & SL11H_INTMASK_DONE_B) ? " done_b" : "",
1387 (mask & SL11H_INTMASK_SOFINTR) ? " sof" : "",
1388 (mask & SL11H_INTMASK_INSRMV) ? " ins/rmv" : "",
1389 (mask & SL11H_INTMASK_RD) ? " rd" : "",
1390 (mask & SL11H_INTMASK_DP) ? " dp" : "");
1393 static int proc_sl811h_show(struct seq_file *s, void *unused)
1395 struct sl811 *sl811 = s->private;
1396 struct sl811h_ep *ep;
1399 seq_printf(s, "%s\n%s version %s\nportstatus[1] = %08x\n",
1400 sl811_to_hcd(sl811)->product_desc,
1401 hcd_name, DRIVER_VERSION,
1404 seq_printf(s, "insert/remove: %ld\n", sl811->stat_insrmv);
1405 seq_printf(s, "current session: done_a %ld done_b %ld "
1406 "wake %ld sof %ld overrun %ld lost %ld\n\n",
1407 sl811->stat_a, sl811->stat_b,
1408 sl811->stat_wake, sl811->stat_sof,
1409 sl811->stat_overrun, sl811->stat_lost);
1411 spin_lock_irq(&sl811->lock);
1413 if (sl811->ctrl1 & SL11H_CTL1MASK_SUSPEND)
1414 seq_printf(s, "(suspended)\n\n");
1416 u8 t = sl811_read(sl811, SL11H_CTLREG1);
1418 seq_printf(s, "ctrl1 %02x%s%s%s%s\n", t,
1419 (t & SL11H_CTL1MASK_SOF_ENA) ? " sofgen" : "",
1420 ({char *s; switch (t & SL11H_CTL1MASK_FORCE) {
1421 case SL11H_CTL1MASK_NORMAL: s = ""; break;
1422 case SL11H_CTL1MASK_SE0: s = " se0/reset"; break;
1423 case SL11H_CTL1MASK_K: s = " k/resume"; break;
1424 default: s = "j"; break;
1426 (t & SL11H_CTL1MASK_LSPD) ? " lowspeed" : "",
1427 (t & SL11H_CTL1MASK_SUSPEND) ? " suspend" : "");
1429 dump_irq(s, "irq_enable",
1430 sl811_read(sl811, SL11H_IRQ_ENABLE));
1431 dump_irq(s, "irq_status",
1432 sl811_read(sl811, SL11H_IRQ_STATUS));
1433 seq_printf(s, "frame clocks remaining: %d\n",
1434 sl811_read(sl811, SL11H_SOFTMRREG) << 6);
1437 seq_printf(s, "A: qh%p ctl %02x sts %02x\n", sl811->active_a,
1438 sl811_read(sl811, SL811_EP_A(SL11H_HOSTCTLREG)),
1439 sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG)));
1440 seq_printf(s, "B: qh%p ctl %02x sts %02x\n", sl811->active_b,
1441 sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG)),
1442 sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG)));
1443 seq_printf(s, "\n");
1444 list_for_each_entry (ep, &sl811->async, schedule) {
1447 seq_printf(s, "%s%sqh%p, ep%d%s, maxpacket %d"
1449 (ep == sl811->active_a) ? "(A) " : "",
1450 (ep == sl811->active_b) ? "(B) " : "",
1452 ({ char *s; switch (ep->nextpid) {
1453 case USB_PID_IN: s = "in"; break;
1454 case USB_PID_OUT: s = "out"; break;
1455 case USB_PID_SETUP: s = "setup"; break;
1456 case USB_PID_ACK: s = "status"; break;
1457 default: s = "?"; break;
1460 ep->nak_count, ep->error_count);
1461 list_for_each_entry (urb, &ep->hep->urb_list, urb_list) {
1462 seq_printf(s, " urb%p, %d/%d\n", urb,
1464 urb->transfer_buffer_length);
1467 if (!list_empty(&sl811->async))
1468 seq_printf(s, "\n");
1470 seq_printf(s, "periodic size= %d\n", PERIODIC_SIZE);
1472 for (i = 0; i < PERIODIC_SIZE; i++) {
1473 ep = sl811->periodic[i];
1476 seq_printf(s, "%2d [%3d]:\n", i, sl811->load[i]);
1478 /* DUMB: prints shared entries multiple times */
1481 " %s%sqh%d/%p (%sdev%d ep%d%s max %d) "
1483 (ep == sl811->active_a) ? "(A) " : "",
1484 (ep == sl811->active_b) ? "(B) " : "",
1486 (ep->udev->speed == USB_SPEED_FULL)
1488 ep->udev->devnum, ep->epnum,
1489 (ep->epnum == 0) ? ""
1490 : ((ep->nextpid == USB_PID_IN)
1493 ep->maxpacket, ep->error_count);
1498 spin_unlock_irq(&sl811->lock);
1499 seq_printf(s, "\n");
1504 static int proc_sl811h_open(struct inode *inode, struct file *file)
1506 return single_open(file, proc_sl811h_show, PDE(inode)->data);
1509 static const struct file_operations proc_ops = {
1510 .open = proc_sl811h_open,
1512 .llseek = seq_lseek,
1513 .release = single_release,
1516 /* expect just one sl811 per system */
1517 static const char proc_filename[] = "driver/sl811h";
1519 static void create_debug_file(struct sl811 *sl811)
1521 struct proc_dir_entry *pde;
1523 pde = create_proc_entry(proc_filename, 0, NULL);
1527 pde->proc_fops = &proc_ops;
1532 static void remove_debug_file(struct sl811 *sl811)
1535 remove_proc_entry(proc_filename, NULL);
1540 /*-------------------------------------------------------------------------*/
1543 sl811h_stop(struct usb_hcd *hcd)
1545 struct sl811 *sl811 = hcd_to_sl811(hcd);
1546 unsigned long flags;
1548 del_timer_sync(&hcd->rh_timer);
1550 spin_lock_irqsave(&sl811->lock, flags);
1551 port_power(sl811, 0);
1552 spin_unlock_irqrestore(&sl811->lock, flags);
1556 sl811h_start(struct usb_hcd *hcd)
1558 struct sl811 *sl811 = hcd_to_sl811(hcd);
1560 /* chip has been reset, VBUS power is off */
1561 hcd->state = HC_STATE_RUNNING;
1564 if (!device_can_wakeup(hcd->self.controller))
1565 device_init_wakeup(hcd->self.controller,
1566 sl811->board->can_wakeup);
1567 hcd->power_budget = sl811->board->power * 2;
1570 /* enable power and interupts */
1571 port_power(sl811, 1);
1576 /*-------------------------------------------------------------------------*/
1578 static struct hc_driver sl811h_hc_driver = {
1579 .description = hcd_name,
1580 .hcd_priv_size = sizeof(struct sl811),
1583 * generic hardware linkage
1586 .flags = HCD_USB11 | HCD_MEMORY,
1588 /* Basic lifecycle operations */
1589 .start = sl811h_start,
1590 .stop = sl811h_stop,
1593 * managing i/o requests and associated device resources
1595 .urb_enqueue = sl811h_urb_enqueue,
1596 .urb_dequeue = sl811h_urb_dequeue,
1597 .endpoint_disable = sl811h_endpoint_disable,
1600 * periodic schedule support
1602 .get_frame_number = sl811h_get_frame,
1607 .hub_status_data = sl811h_hub_status_data,
1608 .hub_control = sl811h_hub_control,
1609 .bus_suspend = sl811h_bus_suspend,
1610 .bus_resume = sl811h_bus_resume,
1613 /*-------------------------------------------------------------------------*/
1615 static int __devexit
1616 sl811h_remove(struct platform_device *dev)
1618 struct usb_hcd *hcd = platform_get_drvdata(dev);
1619 struct sl811 *sl811 = hcd_to_sl811(hcd);
1620 struct resource *res;
1622 remove_debug_file(sl811);
1623 usb_remove_hcd(hcd);
1625 /* some platforms may use IORESOURCE_IO */
1626 res = platform_get_resource(dev, IORESOURCE_MEM, 1);
1628 iounmap(sl811->data_reg);
1630 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
1632 iounmap(sl811->addr_reg);
1638 static int __devinit
1639 sl811h_probe(struct platform_device *dev)
1641 struct usb_hcd *hcd;
1642 struct sl811 *sl811;
1643 struct resource *addr, *data;
1645 void __iomem *addr_reg;
1646 void __iomem *data_reg;
1650 /* basic sanity checks first. board-specific init logic should
1651 * have initialized these three resources and probably board
1652 * specific platform_data. we don't probe for IRQs, and do only
1653 * minimal sanity checking.
1655 irq = platform_get_irq(dev, 0);
1656 if (dev->num_resources < 3 || irq < 0)
1659 /* refuse to confuse usbcore */
1660 if (dev->dev.dma_mask) {
1661 DBG("no we won't dma\n");
1665 /* the chip may be wired for either kind of addressing */
1666 addr = platform_get_resource(dev, IORESOURCE_MEM, 0);
1667 data = platform_get_resource(dev, IORESOURCE_MEM, 1);
1669 if (!addr || !data) {
1670 addr = platform_get_resource(dev, IORESOURCE_IO, 0);
1671 data = platform_get_resource(dev, IORESOURCE_IO, 1);
1676 * NOTE: 64-bit resource->start is getting truncated
1677 * to avoid compiler warning, assuming that ->start
1678 * is always 32-bit for this case
1680 addr_reg = (void __iomem *) (unsigned long) addr->start;
1681 data_reg = (void __iomem *) (unsigned long) data->start;
1683 addr_reg = ioremap(addr->start, 1);
1684 if (addr_reg == NULL) {
1689 data_reg = ioremap(data->start, 1);
1690 if (data_reg == NULL) {
1696 /* allocate and initialize hcd */
1697 hcd = usb_create_hcd(&sl811h_hc_driver, &dev->dev, dev->dev.bus_id);
1702 hcd->rsrc_start = addr->start;
1703 sl811 = hcd_to_sl811(hcd);
1705 spin_lock_init(&sl811->lock);
1706 INIT_LIST_HEAD(&sl811->async);
1707 sl811->board = dev->dev.platform_data;
1708 init_timer(&sl811->timer);
1709 sl811->timer.function = sl811h_timer;
1710 sl811->timer.data = (unsigned long) sl811;
1711 sl811->addr_reg = addr_reg;
1712 sl811->data_reg = data_reg;
1714 spin_lock_irq(&sl811->lock);
1715 port_power(sl811, 0);
1716 spin_unlock_irq(&sl811->lock);
1719 tmp = sl811_read(sl811, SL11H_HWREVREG);
1722 hcd->product_desc = "SL811HS v1.2";
1725 hcd->product_desc = "SL811HS v1.5";
1728 /* reject case 0, SL11S is less functional */
1729 DBG("chiprev %02x\n", tmp);
1734 /* The chip's IRQ is level triggered, active high. A requirement
1735 * for platform device setup is to cope with things like signal
1736 * inverters (e.g. CF is active low) or working only with edge
1737 * triggers (e.g. most ARM CPUs). Initial driver stress testing
1738 * was on a system with single edge triggering, so most sorts of
1739 * triggering arrangement should work.
1741 retval = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
1745 create_debug_file(sl811);
1757 DBG("init error, %d\n", retval);
1763 /* for this device there's no useful distinction between the controller
1764 * and its root hub, except that the root hub only gets direct PM calls
1765 * when CONFIG_USB_SUSPEND is enabled.
1769 sl811h_suspend(struct platform_device *dev, pm_message_t state)
1771 struct usb_hcd *hcd = platform_get_drvdata(dev);
1772 struct sl811 *sl811 = hcd_to_sl811(hcd);
1775 switch (state.event) {
1776 case PM_EVENT_FREEZE:
1777 retval = sl811h_bus_suspend(hcd);
1779 case PM_EVENT_SUSPEND:
1780 case PM_EVENT_PRETHAW: /* explicitly discard hw state */
1781 port_power(sl811, 0);
1785 dev->dev.power.power_state = state;
1790 sl811h_resume(struct platform_device *dev)
1792 struct usb_hcd *hcd = platform_get_drvdata(dev);
1793 struct sl811 *sl811 = hcd_to_sl811(hcd);
1795 /* with no "check to see if VBUS is still powered" board hook,
1796 * let's assume it'd only be powered to enable remote wakeup.
1798 if (dev->dev.power.power_state.event == PM_EVENT_SUSPEND
1799 || !device_can_wakeup(&hcd->self.root_hub->dev)) {
1801 port_power(sl811, 1);
1802 usb_root_hub_lost_power(hcd->self.root_hub);
1806 dev->dev.power.power_state = PMSG_ON;
1807 return sl811h_bus_resume(hcd);
1812 #define sl811h_suspend NULL
1813 #define sl811h_resume NULL
1818 /* this driver is exported so sl811_cs can depend on it */
1819 struct platform_driver sl811h_driver = {
1820 .probe = sl811h_probe,
1821 .remove = __devexit_p(sl811h_remove),
1823 .suspend = sl811h_suspend,
1824 .resume = sl811h_resume,
1826 .name = (char *) hcd_name,
1827 .owner = THIS_MODULE,
1830 EXPORT_SYMBOL(sl811h_driver);
1832 /*-------------------------------------------------------------------------*/
1834 static int __init sl811h_init(void)
1839 INFO("driver %s, %s\n", hcd_name, DRIVER_VERSION);
1840 return platform_driver_register(&sl811h_driver);
1842 module_init(sl811h_init);
1844 static void __exit sl811h_cleanup(void)
1846 platform_driver_unregister(&sl811h_driver);
1848 module_exit(sl811h_cleanup);