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 if (urb->status == -EINPROGRESS)
440 urb->status = status;
442 spin_unlock(&urb->lock);
444 usb_hcd_unlink_urb_from_ep(sl811_to_hcd(sl811), urb);
445 spin_unlock(&sl811->lock);
446 usb_hcd_giveback_urb(sl811_to_hcd(sl811), urb);
447 spin_lock(&sl811->lock);
449 /* leave active endpoints in the schedule */
450 if (!list_empty(&ep->hep->urb_list))
453 /* async deschedule? */
454 if (!list_empty(&ep->schedule)) {
455 list_del_init(&ep->schedule);
456 if (ep == sl811->next_async)
457 sl811->next_async = NULL;
461 /* periodic deschedule */
462 DBG("deschedule qh%d/%p branch %d\n", ep->period, ep, ep->branch);
463 for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
464 struct sl811h_ep *temp;
465 struct sl811h_ep **prev = &sl811->periodic[i];
467 while (*prev && ((temp = *prev) != ep))
471 sl811->load[i] -= ep->load;
473 ep->branch = PERIODIC_SIZE;
474 sl811->periodic_count--;
475 sl811_to_hcd(sl811)->self.bandwidth_allocated
476 -= ep->load / ep->period;
477 if (ep == sl811->next_periodic)
478 sl811->next_periodic = ep->next;
480 /* we might turn SOFs back on again for the async schedule */
481 if (sl811->periodic_count == 0)
486 done(struct sl811 *sl811, struct sl811h_ep *ep, u8 bank)
490 int urbstat = -EINPROGRESS;
495 status = sl811_read(sl811, bank + SL11H_PKTSTATREG);
497 urb = container_of(ep->hep->urb_list.next, struct urb, urb_list);
499 /* we can safely ignore NAKs */
500 if (status & SL11H_STATMASK_NAK) {
501 // PACKET("...NAK_%02x qh%p\n", bank, ep);
506 /* ACK advances transfer, toggle, and maybe queue */
507 } else if (status & SL11H_STATMASK_ACK) {
508 struct usb_device *udev = urb->dev;
512 /* urb->iso_frame_desc is currently ignored here... */
514 ep->nak_count = ep->error_count = 0;
515 switch (ep->nextpid) {
517 // PACKET("...ACK/out_%02x qh%p\n", bank, ep);
518 urb->actual_length += ep->length;
519 usb_dotoggle(udev, ep->epnum, 1);
520 if (urb->actual_length
521 == urb->transfer_buffer_length) {
522 if (usb_pipecontrol(urb->pipe))
523 ep->nextpid = USB_PID_ACK;
525 /* some bulk protocols terminate OUT transfers
526 * by a short packet, using ZLPs not padding.
528 else if (ep->length < ep->maxpacket
529 || !(urb->transfer_flags
535 // PACKET("...ACK/in_%02x qh%p\n", bank, ep);
536 buf = urb->transfer_buffer + urb->actual_length;
538 len = ep->maxpacket - sl811_read(sl811,
539 bank + SL11H_XFERCNTREG);
540 if (len > ep->length) {
542 urb->status = -EOVERFLOW;
544 urb->actual_length += len;
545 sl811_read_buf(sl811, SL811HS_PACKET_BUF(bank == 0),
547 usb_dotoggle(udev, ep->epnum, 0);
548 if (urb->actual_length == urb->transfer_buffer_length)
550 else if (len < ep->maxpacket) {
551 if (urb->transfer_flags & URB_SHORT_NOT_OK)
552 urbstat = -EREMOTEIO;
556 if (usb_pipecontrol(urb->pipe)
557 && (urbstat == -EREMOTEIO
560 /* NOTE if the status stage STALLs (why?),
561 * this reports the wrong urb status.
563 spin_lock(&urb->lock);
564 if (urb->status == -EINPROGRESS)
565 urb->status = urbstat;
566 spin_unlock(&urb->lock);
569 ep->nextpid = USB_PID_ACK;
573 // PACKET("...ACK/setup_%02x qh%p\n", bank, ep);
574 if (urb->transfer_buffer_length == urb->actual_length)
575 ep->nextpid = USB_PID_ACK;
576 else if (usb_pipeout(urb->pipe)) {
577 usb_settoggle(udev, 0, 1, 1);
578 ep->nextpid = USB_PID_OUT;
580 usb_settoggle(udev, 0, 0, 1);
581 ep->nextpid = USB_PID_IN;
585 // PACKET("...ACK/status_%02x qh%p\n", bank, ep);
590 /* STALL stops all transfers */
591 } else if (status & SL11H_STATMASK_STALL) {
592 PACKET("...STALL_%02x qh%p\n", bank, ep);
593 ep->nak_count = ep->error_count = 0;
596 /* error? retry, until "3 strikes" */
597 } else if (++ep->error_count >= 3) {
598 if (status & SL11H_STATMASK_TMOUT)
600 else if (status & SL11H_STATMASK_OVF)
601 urbstat = -EOVERFLOW;
605 PACKET("...3STRIKES_%02x %02x qh%p stat %d\n",
606 bank, status, ep, urbstat);
609 if (urb && (urbstat != -EINPROGRESS || urb->status != -EINPROGRESS))
610 finish_request(sl811, ep, urb, urbstat);
613 static inline u8 checkdone(struct sl811 *sl811)
618 if (sl811->active_a && time_before_eq(sl811->jiffies_a, jiffies)) {
619 ctl = sl811_read(sl811, SL811_EP_A(SL11H_HOSTCTLREG));
620 if (ctl & SL11H_HCTLMASK_ARM)
621 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0);
622 DBG("%s DONE_A: ctrl %02x sts %02x\n",
623 (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost",
625 sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG)));
626 irqstat |= SL11H_INTMASK_DONE_A;
629 if (sl811->active_b && time_before_eq(sl811->jiffies_b, jiffies)) {
630 ctl = sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG));
631 if (ctl & SL11H_HCTLMASK_ARM)
632 sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0);
633 DBG("%s DONE_B: ctrl %02x sts %02x\n",
634 (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost",
636 sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG)));
637 irqstat |= SL11H_INTMASK_DONE_A;
643 static irqreturn_t sl811h_irq(struct usb_hcd *hcd)
645 struct sl811 *sl811 = hcd_to_sl811(hcd);
647 irqreturn_t ret = IRQ_NONE;
648 unsigned retries = 5;
650 spin_lock(&sl811->lock);
653 irqstat = sl811_read(sl811, SL11H_IRQ_STATUS) & ~SL11H_INTMASK_DP;
655 sl811_write(sl811, SL11H_IRQ_STATUS, irqstat);
656 irqstat &= sl811->irq_enable;
660 /* this may no longer be necessary ... */
662 irqstat = checkdone(sl811);
668 /* USB packets, not necessarily handled in the order they're
669 * issued ... that's fine if they're different endpoints.
671 if (irqstat & SL11H_INTMASK_DONE_A) {
672 done(sl811, sl811->active_a, SL811_EP_A(SL811_HOST_BUF));
673 sl811->active_a = NULL;
677 if (irqstat & SL11H_INTMASK_DONE_B) {
678 done(sl811, sl811->active_b, SL811_EP_B(SL811_HOST_BUF));
679 sl811->active_b = NULL;
683 if (irqstat & SL11H_INTMASK_SOFINTR) {
686 index = sl811->frame++ % (PERIODIC_SIZE - 1);
689 /* be graceful about almost-inevitable periodic schedule
690 * overruns: continue the previous frame's transfers iff
691 * this one has nothing scheduled.
693 if (sl811->next_periodic) {
694 // ERR("overrun to slot %d\n", index);
695 sl811->stat_overrun++;
697 if (sl811->periodic[index])
698 sl811->next_periodic = sl811->periodic[index];
701 /* khubd manages debouncing and wakeup */
702 if (irqstat & SL11H_INTMASK_INSRMV) {
703 sl811->stat_insrmv++;
705 /* most stats are reset for each VBUS session */
706 sl811->stat_wake = 0;
710 sl811->stat_lost = 0;
713 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
715 sl811->irq_enable = SL11H_INTMASK_INSRMV;
716 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
718 /* usbcore nukes other pending transactions on disconnect */
719 if (sl811->active_a) {
720 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0);
721 finish_request(sl811, sl811->active_a,
722 container_of(sl811->active_a
723 ->hep->urb_list.next,
724 struct urb, urb_list),
726 sl811->active_a = NULL;
729 if (sl811->active_b) {
730 sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0);
731 finish_request(sl811, sl811->active_b,
732 container_of(sl811->active_b
733 ->hep->urb_list.next,
734 struct urb, urb_list),
736 sl811->active_b = NULL;
740 /* port status seems weird until after reset, so
741 * force the reset and make khubd clean up later.
743 sl811->port1 |= (1 << USB_PORT_FEAT_C_CONNECTION)
744 | (1 << USB_PORT_FEAT_CONNECTION);
746 } else if (irqstat & SL11H_INTMASK_RD) {
747 if (sl811->port1 & (1 << USB_PORT_FEAT_SUSPEND)) {
749 sl811->port1 |= 1 << USB_PORT_FEAT_C_SUSPEND;
752 irqstat &= ~SL11H_INTMASK_RD;
756 if (sl811->port1 & (1 << USB_PORT_FEAT_ENABLE))
757 start_transfer(sl811);
763 if (sl811->periodic_count == 0 && list_empty(&sl811->async))
765 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
767 spin_unlock(&sl811->lock);
772 /*-------------------------------------------------------------------------*/
774 /* usb 1.1 says max 90% of a frame is available for periodic transfers.
775 * this driver doesn't promise that much since it's got to handle an
776 * IRQ per packet; irq handling latencies also use up that time.
778 * NOTE: the periodic schedule is a sparse tree, with the load for
779 * each branch minimized. see fig 3.5 in the OHCI spec for example.
781 #define MAX_PERIODIC_LOAD 500 /* out of 1000 usec */
783 static int balance(struct sl811 *sl811, u16 period, u16 load)
785 int i, branch = -ENOSPC;
787 /* search for the least loaded schedule branch of that period
788 * which has enough bandwidth left unreserved.
790 for (i = 0; i < period ; i++) {
791 if (branch < 0 || sl811->load[branch] > sl811->load[i]) {
794 for (j = i; j < PERIODIC_SIZE; j += period) {
795 if ((sl811->load[j] + load)
799 if (j < PERIODIC_SIZE)
807 /*-------------------------------------------------------------------------*/
809 static int sl811h_urb_enqueue(
814 struct sl811 *sl811 = hcd_to_sl811(hcd);
815 struct usb_device *udev = urb->dev;
816 unsigned int pipe = urb->pipe;
817 int is_out = !usb_pipein(pipe);
818 int type = usb_pipetype(pipe);
819 int epnum = usb_pipeendpoint(pipe);
820 struct sl811h_ep *ep = NULL;
824 struct usb_host_endpoint *hep = urb->ep;
827 if (type == PIPE_ISOCHRONOUS)
831 /* avoid all allocations within spinlocks */
833 ep = kzalloc(sizeof *ep, mem_flags);
835 spin_lock_irqsave(&sl811->lock, flags);
837 /* don't submit to a dead or disabled port */
838 if (!(sl811->port1 & (1 << USB_PORT_FEAT_ENABLE))
839 || !HC_IS_RUNNING(hcd->state)) {
842 goto fail_not_linked;
844 retval = usb_hcd_link_urb_to_ep(hcd, urb);
847 goto fail_not_linked;
858 INIT_LIST_HEAD(&ep->schedule);
861 ep->maxpacket = usb_maxpacket(udev, urb->pipe, is_out);
862 ep->defctrl = SL11H_HCTLMASK_ARM | SL11H_HCTLMASK_ENABLE;
863 usb_settoggle(udev, epnum, is_out, 0);
865 if (type == PIPE_CONTROL)
866 ep->nextpid = USB_PID_SETUP;
868 ep->nextpid = USB_PID_OUT;
870 ep->nextpid = USB_PID_IN;
872 if (ep->maxpacket > H_MAXPACKET) {
873 /* iso packets up to 240 bytes could work... */
874 DBG("dev %d ep%d maxpacket %d\n",
875 udev->devnum, epnum, ep->maxpacket);
880 if (udev->speed == USB_SPEED_LOW) {
881 /* send preamble for external hub? */
882 if (!(sl811->ctrl1 & SL11H_CTL1MASK_LSPD))
883 ep->defctrl |= SL11H_HCTLMASK_PREAMBLE;
886 case PIPE_ISOCHRONOUS:
888 if (urb->interval > PERIODIC_SIZE)
889 urb->interval = PERIODIC_SIZE;
890 ep->period = urb->interval;
891 ep->branch = PERIODIC_SIZE;
892 if (type == PIPE_ISOCHRONOUS)
893 ep->defctrl |= SL11H_HCTLMASK_ISOCH;
894 ep->load = usb_calc_bus_time(udev->speed, !is_out,
895 (type == PIPE_ISOCHRONOUS),
896 usb_maxpacket(udev, pipe, is_out))
905 /* maybe put endpoint into schedule */
909 if (list_empty(&ep->schedule))
910 list_add_tail(&ep->schedule, &sl811->async);
912 case PIPE_ISOCHRONOUS:
914 urb->interval = ep->period;
915 if (ep->branch < PERIODIC_SIZE) {
916 /* NOTE: the phase is correct here, but the value
917 * needs offsetting by the transfer queue depth.
918 * All current drivers ignore start_frame, so this
919 * is unlikely to ever matter...
921 urb->start_frame = (sl811->frame & (PERIODIC_SIZE - 1))
926 retval = balance(sl811, ep->period, ep->load);
931 urb->start_frame = (sl811->frame & (PERIODIC_SIZE - 1))
934 /* sort each schedule branch by period (slow before fast)
935 * to share the faster parts of the tree without needing
936 * dummy/placeholder nodes
938 DBG("schedule qh%d/%p branch %d\n", ep->period, ep, ep->branch);
939 for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
940 struct sl811h_ep **prev = &sl811->periodic[i];
941 struct sl811h_ep *here = *prev;
943 while (here && ep != here) {
944 if (ep->period > here->period)
953 sl811->load[i] += ep->load;
955 sl811->periodic_count++;
956 hcd->self.bandwidth_allocated += ep->load / ep->period;
960 /* in case of unlink-during-submit */
961 spin_lock(&urb->lock);
962 if (urb->status != -EINPROGRESS) {
963 spin_unlock(&urb->lock);
964 finish_request(sl811, ep, urb, 0);
969 spin_unlock(&urb->lock);
971 start_transfer(sl811);
972 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
975 usb_hcd_unlink_urb_from_ep(hcd, urb);
977 spin_unlock_irqrestore(&sl811->lock, flags);
981 static int sl811h_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
983 struct sl811 *sl811 = hcd_to_sl811(hcd);
984 struct usb_host_endpoint *hep;
986 struct sl811h_ep *ep;
989 spin_lock_irqsave(&sl811->lock, flags);
990 retval = usb_hcd_check_unlink_urb(hcd, urb, status);
997 /* finish right away if this urb can't be active ...
998 * note that some drivers wrongly expect delays
1000 if (ep->hep->urb_list.next != &urb->urb_list) {
1001 /* not front of queue? never active */
1003 /* for active transfers, we expect an IRQ */
1004 } else if (sl811->active_a == ep) {
1005 if (time_before_eq(sl811->jiffies_a, jiffies)) {
1006 /* happens a lot with lowspeed?? */
1007 DBG("giveup on DONE_A: ctrl %02x sts %02x\n",
1009 SL811_EP_A(SL11H_HOSTCTLREG)),
1011 SL811_EP_A(SL11H_PKTSTATREG)));
1012 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG),
1014 sl811->active_a = NULL;
1018 } else if (sl811->active_b == ep) {
1019 if (time_before_eq(sl811->jiffies_a, jiffies)) {
1020 /* happens a lot with lowspeed?? */
1021 DBG("giveup on DONE_B: ctrl %02x sts %02x\n",
1023 SL811_EP_B(SL11H_HOSTCTLREG)),
1025 SL811_EP_B(SL11H_PKTSTATREG)));
1026 sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG),
1028 sl811->active_b = NULL;
1033 /* front of queue for inactive endpoint */
1037 finish_request(sl811, ep, urb, 0);
1039 VDBG("dequeue, urb %p active %s; wait4irq\n", urb,
1040 (sl811->active_a == ep) ? "A" : "B");
1044 spin_unlock_irqrestore(&sl811->lock, flags);
1049 sl811h_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *hep)
1051 struct sl811h_ep *ep = hep->hcpriv;
1056 /* assume we'd just wait for the irq */
1057 if (!list_empty(&hep->urb_list))
1059 if (!list_empty(&hep->urb_list))
1060 WARN("ep %p not empty?\n", ep);
1067 sl811h_get_frame(struct usb_hcd *hcd)
1069 struct sl811 *sl811 = hcd_to_sl811(hcd);
1071 /* wrong except while periodic transfers are scheduled;
1072 * never matches the on-the-wire frame;
1073 * subject to overruns.
1075 return sl811->frame;
1079 /*-------------------------------------------------------------------------*/
1081 /* the virtual root hub timer IRQ checks for hub status */
1083 sl811h_hub_status_data(struct usb_hcd *hcd, char *buf)
1085 struct sl811 *sl811 = hcd_to_sl811(hcd);
1087 unsigned long flags;
1089 /* non-SMP HACK: use root hub timer as i/o watchdog
1090 * this seems essential when SOF IRQs aren't in use...
1092 local_irq_save(flags);
1093 if (!timer_pending(&sl811->timer)) {
1094 if (sl811h_irq( /* ~0, */ hcd) != IRQ_NONE)
1097 local_irq_restore(flags);
1100 if (!(sl811->port1 & (0xffff << 16)))
1103 /* tell khubd port 1 changed */
1109 sl811h_hub_descriptor (
1110 struct sl811 *sl811,
1111 struct usb_hub_descriptor *desc
1115 desc->bDescriptorType = 0x29;
1116 desc->bHubContrCurrent = 0;
1118 desc->bNbrPorts = 1;
1119 desc->bDescLength = 9;
1121 /* per-port power switching (gang of one!), or none */
1122 desc->bPwrOn2PwrGood = 0;
1123 if (sl811->board && sl811->board->port_power) {
1124 desc->bPwrOn2PwrGood = sl811->board->potpg;
1125 if (!desc->bPwrOn2PwrGood)
1126 desc->bPwrOn2PwrGood = 10;
1131 /* no overcurrent errors detection/handling */
1134 desc->wHubCharacteristics = (__force __u16)cpu_to_le16(temp);
1136 /* two bitmaps: ports removable, and legacy PortPwrCtrlMask */
1137 desc->bitmap[0] = 0 << 1;
1138 desc->bitmap[1] = ~0;
1142 sl811h_timer(unsigned long _sl811)
1144 struct sl811 *sl811 = (void *) _sl811;
1145 unsigned long flags;
1147 u8 signaling = sl811->ctrl1 & SL11H_CTL1MASK_FORCE;
1148 const u32 mask = (1 << USB_PORT_FEAT_CONNECTION)
1149 | (1 << USB_PORT_FEAT_ENABLE)
1150 | (1 << USB_PORT_FEAT_LOWSPEED);
1152 spin_lock_irqsave(&sl811->lock, flags);
1154 /* stop special signaling */
1155 sl811->ctrl1 &= ~SL11H_CTL1MASK_FORCE;
1156 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1159 irqstat = sl811_read(sl811, SL11H_IRQ_STATUS);
1161 switch (signaling) {
1162 case SL11H_CTL1MASK_SE0:
1164 sl811->port1 = (1 << USB_PORT_FEAT_C_RESET)
1165 | (1 << USB_PORT_FEAT_POWER);
1167 /* don't wrongly ack RD */
1168 if (irqstat & SL11H_INTMASK_INSRMV)
1169 irqstat &= ~SL11H_INTMASK_RD;
1171 case SL11H_CTL1MASK_K:
1172 DBG("end resume\n");
1173 sl811->port1 &= ~(1 << USB_PORT_FEAT_SUSPEND);
1176 DBG("odd timer signaling: %02x\n", signaling);
1179 sl811_write(sl811, SL11H_IRQ_STATUS, irqstat);
1181 if (irqstat & SL11H_INTMASK_RD) {
1182 /* usbcore nukes all pending transactions on disconnect */
1183 if (sl811->port1 & (1 << USB_PORT_FEAT_CONNECTION))
1184 sl811->port1 |= (1 << USB_PORT_FEAT_C_CONNECTION)
1185 | (1 << USB_PORT_FEAT_C_ENABLE);
1186 sl811->port1 &= ~mask;
1187 sl811->irq_enable = SL11H_INTMASK_INSRMV;
1189 sl811->port1 |= mask;
1190 if (irqstat & SL11H_INTMASK_DP)
1191 sl811->port1 &= ~(1 << USB_PORT_FEAT_LOWSPEED);
1192 sl811->irq_enable = SL11H_INTMASK_INSRMV | SL11H_INTMASK_RD;
1195 if (sl811->port1 & (1 << USB_PORT_FEAT_CONNECTION)) {
1196 u8 ctrl2 = SL811HS_CTL2_INIT;
1198 sl811->irq_enable |= SL11H_INTMASK_DONE_A;
1200 sl811->irq_enable |= SL11H_INTMASK_DONE_B;
1202 if (sl811->port1 & (1 << USB_PORT_FEAT_LOWSPEED)) {
1203 sl811->ctrl1 |= SL11H_CTL1MASK_LSPD;
1204 ctrl2 |= SL811HS_CTL2MASK_DSWAP;
1207 /* start SOFs flowing, kickstarting with A registers */
1208 sl811->ctrl1 |= SL11H_CTL1MASK_SOF_ENA;
1209 sl811_write(sl811, SL11H_SOFLOWREG, 0xe0);
1210 sl811_write(sl811, SL811HS_CTLREG2, ctrl2);
1212 /* autoincrementing */
1213 sl811_write(sl811, SL811_EP_A(SL11H_BUFLNTHREG), 0);
1214 writeb(SL_SOF, sl811->data_reg);
1215 writeb(0, sl811->data_reg);
1216 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG),
1217 SL11H_HCTLMASK_ARM);
1219 /* khubd provides debounce delay */
1223 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1226 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
1227 spin_unlock_irqrestore(&sl811->lock, flags);
1232 struct usb_hcd *hcd,
1239 struct sl811 *sl811 = hcd_to_sl811(hcd);
1241 unsigned long flags;
1243 spin_lock_irqsave(&sl811->lock, flags);
1246 case ClearHubFeature:
1249 case C_HUB_OVER_CURRENT:
1250 case C_HUB_LOCAL_POWER:
1256 case ClearPortFeature:
1257 if (wIndex != 1 || wLength != 0)
1261 case USB_PORT_FEAT_ENABLE:
1262 sl811->port1 &= (1 << USB_PORT_FEAT_POWER);
1264 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1265 sl811->irq_enable = SL11H_INTMASK_INSRMV;
1266 sl811_write(sl811, SL11H_IRQ_ENABLE,
1269 case USB_PORT_FEAT_SUSPEND:
1270 if (!(sl811->port1 & (1 << USB_PORT_FEAT_SUSPEND)))
1273 /* 20 msec of resume/K signaling, other irqs blocked */
1274 DBG("start resume...\n");
1275 sl811->irq_enable = 0;
1276 sl811_write(sl811, SL11H_IRQ_ENABLE,
1278 sl811->ctrl1 |= SL11H_CTL1MASK_K;
1279 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1281 mod_timer(&sl811->timer, jiffies
1282 + msecs_to_jiffies(20));
1284 case USB_PORT_FEAT_POWER:
1285 port_power(sl811, 0);
1287 case USB_PORT_FEAT_C_ENABLE:
1288 case USB_PORT_FEAT_C_SUSPEND:
1289 case USB_PORT_FEAT_C_CONNECTION:
1290 case USB_PORT_FEAT_C_OVER_CURRENT:
1291 case USB_PORT_FEAT_C_RESET:
1296 sl811->port1 &= ~(1 << wValue);
1298 case GetHubDescriptor:
1299 sl811h_hub_descriptor(sl811, (struct usb_hub_descriptor *) buf);
1302 *(__le32 *) buf = cpu_to_le32(0);
1307 *(__le32 *) buf = cpu_to_le32(sl811->port1);
1310 if (*(u16*)(buf+2)) /* only if wPortChange is interesting */
1312 DBG("GetPortStatus %08x\n", sl811->port1);
1314 case SetPortFeature:
1315 if (wIndex != 1 || wLength != 0)
1318 case USB_PORT_FEAT_SUSPEND:
1319 if (sl811->port1 & (1 << USB_PORT_FEAT_RESET))
1321 if (!(sl811->port1 & (1 << USB_PORT_FEAT_ENABLE)))
1324 DBG("suspend...\n");
1325 sl811->ctrl1 &= ~SL11H_CTL1MASK_SOF_ENA;
1326 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1328 case USB_PORT_FEAT_POWER:
1329 port_power(sl811, 1);
1331 case USB_PORT_FEAT_RESET:
1332 if (sl811->port1 & (1 << USB_PORT_FEAT_SUSPEND))
1334 if (!(sl811->port1 & (1 << USB_PORT_FEAT_POWER)))
1337 /* 50 msec of reset/SE0 signaling, irqs blocked */
1338 sl811->irq_enable = 0;
1339 sl811_write(sl811, SL11H_IRQ_ENABLE,
1341 sl811->ctrl1 = SL11H_CTL1MASK_SE0;
1342 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1343 sl811->port1 |= (1 << USB_PORT_FEAT_RESET);
1344 mod_timer(&sl811->timer, jiffies
1345 + msecs_to_jiffies(50));
1350 sl811->port1 |= 1 << wValue;
1355 /* "protocol stall" on error */
1359 spin_unlock_irqrestore(&sl811->lock, flags);
1366 sl811h_bus_suspend(struct usb_hcd *hcd)
1369 DBG("%s\n", __FUNCTION__);
1374 sl811h_bus_resume(struct usb_hcd *hcd)
1377 DBG("%s\n", __FUNCTION__);
1383 #define sl811h_bus_suspend NULL
1384 #define sl811h_bus_resume NULL
1389 /*-------------------------------------------------------------------------*/
1391 #ifdef STUB_DEBUG_FILE
1393 static inline void create_debug_file(struct sl811 *sl811) { }
1394 static inline void remove_debug_file(struct sl811 *sl811) { }
1398 #include <linux/proc_fs.h>
1399 #include <linux/seq_file.h>
1401 static void dump_irq(struct seq_file *s, char *label, u8 mask)
1403 seq_printf(s, "%s %02x%s%s%s%s%s%s\n", label, mask,
1404 (mask & SL11H_INTMASK_DONE_A) ? " done_a" : "",
1405 (mask & SL11H_INTMASK_DONE_B) ? " done_b" : "",
1406 (mask & SL11H_INTMASK_SOFINTR) ? " sof" : "",
1407 (mask & SL11H_INTMASK_INSRMV) ? " ins/rmv" : "",
1408 (mask & SL11H_INTMASK_RD) ? " rd" : "",
1409 (mask & SL11H_INTMASK_DP) ? " dp" : "");
1412 static int proc_sl811h_show(struct seq_file *s, void *unused)
1414 struct sl811 *sl811 = s->private;
1415 struct sl811h_ep *ep;
1418 seq_printf(s, "%s\n%s version %s\nportstatus[1] = %08x\n",
1419 sl811_to_hcd(sl811)->product_desc,
1420 hcd_name, DRIVER_VERSION,
1423 seq_printf(s, "insert/remove: %ld\n", sl811->stat_insrmv);
1424 seq_printf(s, "current session: done_a %ld done_b %ld "
1425 "wake %ld sof %ld overrun %ld lost %ld\n\n",
1426 sl811->stat_a, sl811->stat_b,
1427 sl811->stat_wake, sl811->stat_sof,
1428 sl811->stat_overrun, sl811->stat_lost);
1430 spin_lock_irq(&sl811->lock);
1432 if (sl811->ctrl1 & SL11H_CTL1MASK_SUSPEND)
1433 seq_printf(s, "(suspended)\n\n");
1435 u8 t = sl811_read(sl811, SL11H_CTLREG1);
1437 seq_printf(s, "ctrl1 %02x%s%s%s%s\n", t,
1438 (t & SL11H_CTL1MASK_SOF_ENA) ? " sofgen" : "",
1439 ({char *s; switch (t & SL11H_CTL1MASK_FORCE) {
1440 case SL11H_CTL1MASK_NORMAL: s = ""; break;
1441 case SL11H_CTL1MASK_SE0: s = " se0/reset"; break;
1442 case SL11H_CTL1MASK_K: s = " k/resume"; break;
1443 default: s = "j"; break;
1445 (t & SL11H_CTL1MASK_LSPD) ? " lowspeed" : "",
1446 (t & SL11H_CTL1MASK_SUSPEND) ? " suspend" : "");
1448 dump_irq(s, "irq_enable",
1449 sl811_read(sl811, SL11H_IRQ_ENABLE));
1450 dump_irq(s, "irq_status",
1451 sl811_read(sl811, SL11H_IRQ_STATUS));
1452 seq_printf(s, "frame clocks remaining: %d\n",
1453 sl811_read(sl811, SL11H_SOFTMRREG) << 6);
1456 seq_printf(s, "A: qh%p ctl %02x sts %02x\n", sl811->active_a,
1457 sl811_read(sl811, SL811_EP_A(SL11H_HOSTCTLREG)),
1458 sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG)));
1459 seq_printf(s, "B: qh%p ctl %02x sts %02x\n", sl811->active_b,
1460 sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG)),
1461 sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG)));
1462 seq_printf(s, "\n");
1463 list_for_each_entry (ep, &sl811->async, schedule) {
1466 seq_printf(s, "%s%sqh%p, ep%d%s, maxpacket %d"
1468 (ep == sl811->active_a) ? "(A) " : "",
1469 (ep == sl811->active_b) ? "(B) " : "",
1471 ({ char *s; switch (ep->nextpid) {
1472 case USB_PID_IN: s = "in"; break;
1473 case USB_PID_OUT: s = "out"; break;
1474 case USB_PID_SETUP: s = "setup"; break;
1475 case USB_PID_ACK: s = "status"; break;
1476 default: s = "?"; break;
1479 ep->nak_count, ep->error_count);
1480 list_for_each_entry (urb, &ep->hep->urb_list, urb_list) {
1481 seq_printf(s, " urb%p, %d/%d\n", urb,
1483 urb->transfer_buffer_length);
1486 if (!list_empty(&sl811->async))
1487 seq_printf(s, "\n");
1489 seq_printf(s, "periodic size= %d\n", PERIODIC_SIZE);
1491 for (i = 0; i < PERIODIC_SIZE; i++) {
1492 ep = sl811->periodic[i];
1495 seq_printf(s, "%2d [%3d]:\n", i, sl811->load[i]);
1497 /* DUMB: prints shared entries multiple times */
1500 " %s%sqh%d/%p (%sdev%d ep%d%s max %d) "
1502 (ep == sl811->active_a) ? "(A) " : "",
1503 (ep == sl811->active_b) ? "(B) " : "",
1505 (ep->udev->speed == USB_SPEED_FULL)
1507 ep->udev->devnum, ep->epnum,
1508 (ep->epnum == 0) ? ""
1509 : ((ep->nextpid == USB_PID_IN)
1512 ep->maxpacket, ep->error_count);
1517 spin_unlock_irq(&sl811->lock);
1518 seq_printf(s, "\n");
1523 static int proc_sl811h_open(struct inode *inode, struct file *file)
1525 return single_open(file, proc_sl811h_show, PDE(inode)->data);
1528 static const struct file_operations proc_ops = {
1529 .open = proc_sl811h_open,
1531 .llseek = seq_lseek,
1532 .release = single_release,
1535 /* expect just one sl811 per system */
1536 static const char proc_filename[] = "driver/sl811h";
1538 static void create_debug_file(struct sl811 *sl811)
1540 struct proc_dir_entry *pde;
1542 pde = create_proc_entry(proc_filename, 0, NULL);
1546 pde->proc_fops = &proc_ops;
1551 static void remove_debug_file(struct sl811 *sl811)
1554 remove_proc_entry(proc_filename, NULL);
1559 /*-------------------------------------------------------------------------*/
1562 sl811h_stop(struct usb_hcd *hcd)
1564 struct sl811 *sl811 = hcd_to_sl811(hcd);
1565 unsigned long flags;
1567 del_timer_sync(&hcd->rh_timer);
1569 spin_lock_irqsave(&sl811->lock, flags);
1570 port_power(sl811, 0);
1571 spin_unlock_irqrestore(&sl811->lock, flags);
1575 sl811h_start(struct usb_hcd *hcd)
1577 struct sl811 *sl811 = hcd_to_sl811(hcd);
1579 /* chip has been reset, VBUS power is off */
1580 hcd->state = HC_STATE_RUNNING;
1583 if (!device_can_wakeup(hcd->self.controller))
1584 device_init_wakeup(hcd->self.controller,
1585 sl811->board->can_wakeup);
1586 hcd->power_budget = sl811->board->power * 2;
1589 /* enable power and interupts */
1590 port_power(sl811, 1);
1595 /*-------------------------------------------------------------------------*/
1597 static struct hc_driver sl811h_hc_driver = {
1598 .description = hcd_name,
1599 .hcd_priv_size = sizeof(struct sl811),
1602 * generic hardware linkage
1605 .flags = HCD_USB11 | HCD_MEMORY,
1607 /* Basic lifecycle operations */
1608 .start = sl811h_start,
1609 .stop = sl811h_stop,
1612 * managing i/o requests and associated device resources
1614 .urb_enqueue = sl811h_urb_enqueue,
1615 .urb_dequeue = sl811h_urb_dequeue,
1616 .endpoint_disable = sl811h_endpoint_disable,
1619 * periodic schedule support
1621 .get_frame_number = sl811h_get_frame,
1626 .hub_status_data = sl811h_hub_status_data,
1627 .hub_control = sl811h_hub_control,
1628 .bus_suspend = sl811h_bus_suspend,
1629 .bus_resume = sl811h_bus_resume,
1632 /*-------------------------------------------------------------------------*/
1634 static int __devexit
1635 sl811h_remove(struct platform_device *dev)
1637 struct usb_hcd *hcd = platform_get_drvdata(dev);
1638 struct sl811 *sl811 = hcd_to_sl811(hcd);
1639 struct resource *res;
1641 remove_debug_file(sl811);
1642 usb_remove_hcd(hcd);
1644 /* some platforms may use IORESOURCE_IO */
1645 res = platform_get_resource(dev, IORESOURCE_MEM, 1);
1647 iounmap(sl811->data_reg);
1649 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
1651 iounmap(sl811->addr_reg);
1657 static int __devinit
1658 sl811h_probe(struct platform_device *dev)
1660 struct usb_hcd *hcd;
1661 struct sl811 *sl811;
1662 struct resource *addr, *data;
1664 void __iomem *addr_reg;
1665 void __iomem *data_reg;
1669 /* basic sanity checks first. board-specific init logic should
1670 * have initialized these three resources and probably board
1671 * specific platform_data. we don't probe for IRQs, and do only
1672 * minimal sanity checking.
1674 irq = platform_get_irq(dev, 0);
1675 if (dev->num_resources < 3 || irq < 0)
1678 /* refuse to confuse usbcore */
1679 if (dev->dev.dma_mask) {
1680 DBG("no we won't dma\n");
1684 /* the chip may be wired for either kind of addressing */
1685 addr = platform_get_resource(dev, IORESOURCE_MEM, 0);
1686 data = platform_get_resource(dev, IORESOURCE_MEM, 1);
1688 if (!addr || !data) {
1689 addr = platform_get_resource(dev, IORESOURCE_IO, 0);
1690 data = platform_get_resource(dev, IORESOURCE_IO, 1);
1695 * NOTE: 64-bit resource->start is getting truncated
1696 * to avoid compiler warning, assuming that ->start
1697 * is always 32-bit for this case
1699 addr_reg = (void __iomem *) (unsigned long) addr->start;
1700 data_reg = (void __iomem *) (unsigned long) data->start;
1702 addr_reg = ioremap(addr->start, 1);
1703 if (addr_reg == NULL) {
1708 data_reg = ioremap(data->start, 1);
1709 if (data_reg == NULL) {
1715 /* allocate and initialize hcd */
1716 hcd = usb_create_hcd(&sl811h_hc_driver, &dev->dev, dev->dev.bus_id);
1721 hcd->rsrc_start = addr->start;
1722 sl811 = hcd_to_sl811(hcd);
1724 spin_lock_init(&sl811->lock);
1725 INIT_LIST_HEAD(&sl811->async);
1726 sl811->board = dev->dev.platform_data;
1727 init_timer(&sl811->timer);
1728 sl811->timer.function = sl811h_timer;
1729 sl811->timer.data = (unsigned long) sl811;
1730 sl811->addr_reg = addr_reg;
1731 sl811->data_reg = data_reg;
1733 spin_lock_irq(&sl811->lock);
1734 port_power(sl811, 0);
1735 spin_unlock_irq(&sl811->lock);
1738 tmp = sl811_read(sl811, SL11H_HWREVREG);
1741 hcd->product_desc = "SL811HS v1.2";
1744 hcd->product_desc = "SL811HS v1.5";
1747 /* reject case 0, SL11S is less functional */
1748 DBG("chiprev %02x\n", tmp);
1753 /* The chip's IRQ is level triggered, active high. A requirement
1754 * for platform device setup is to cope with things like signal
1755 * inverters (e.g. CF is active low) or working only with edge
1756 * triggers (e.g. most ARM CPUs). Initial driver stress testing
1757 * was on a system with single edge triggering, so most sorts of
1758 * triggering arrangement should work.
1760 retval = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
1764 create_debug_file(sl811);
1776 DBG("init error, %d\n", retval);
1782 /* for this device there's no useful distinction between the controller
1783 * and its root hub, except that the root hub only gets direct PM calls
1784 * when CONFIG_USB_SUSPEND is enabled.
1788 sl811h_suspend(struct platform_device *dev, pm_message_t state)
1790 struct usb_hcd *hcd = platform_get_drvdata(dev);
1791 struct sl811 *sl811 = hcd_to_sl811(hcd);
1794 switch (state.event) {
1795 case PM_EVENT_FREEZE:
1796 retval = sl811h_bus_suspend(hcd);
1798 case PM_EVENT_SUSPEND:
1799 case PM_EVENT_PRETHAW: /* explicitly discard hw state */
1800 port_power(sl811, 0);
1804 dev->dev.power.power_state = state;
1809 sl811h_resume(struct platform_device *dev)
1811 struct usb_hcd *hcd = platform_get_drvdata(dev);
1812 struct sl811 *sl811 = hcd_to_sl811(hcd);
1814 /* with no "check to see if VBUS is still powered" board hook,
1815 * let's assume it'd only be powered to enable remote wakeup.
1817 if (dev->dev.power.power_state.event == PM_EVENT_SUSPEND
1818 || !device_can_wakeup(&hcd->self.root_hub->dev)) {
1820 port_power(sl811, 1);
1821 usb_root_hub_lost_power(hcd->self.root_hub);
1825 dev->dev.power.power_state = PMSG_ON;
1826 return sl811h_bus_resume(hcd);
1831 #define sl811h_suspend NULL
1832 #define sl811h_resume NULL
1837 /* this driver is exported so sl811_cs can depend on it */
1838 struct platform_driver sl811h_driver = {
1839 .probe = sl811h_probe,
1840 .remove = __devexit_p(sl811h_remove),
1842 .suspend = sl811h_suspend,
1843 .resume = sl811h_resume,
1845 .name = (char *) hcd_name,
1846 .owner = THIS_MODULE,
1849 EXPORT_SYMBOL(sl811h_driver);
1851 /*-------------------------------------------------------------------------*/
1853 static int __init sl811h_init(void)
1858 INFO("driver %s, %s\n", hcd_name, DRIVER_VERSION);
1859 return platform_driver_register(&sl811h_driver);
1861 module_init(sl811h_init);
1863 static void __exit sl811h_cleanup(void)
1865 platform_driver_unregister(&sl811h_driver);
1867 module_exit(sl811h_cleanup);