1 // SPDX-License-Identifier: GPL-2.0
3 * SL811HS HCD (Host Controller Driver) for USB.
5 * Copyright (C) 2004 Psion Teklogix (for NetBook PRO)
6 * Copyright (C) 2004-2005 David Brownell
8 * Periodic scheduling is based on Roman's OHCI code
9 * Copyright (C) 1999 Roman Weissgaerber
11 * The SL811HS controller handles host side USB (like the SL11H, but with
12 * another register set and SOF generation) as well as peripheral side USB
13 * (like the SL811S). This driver version doesn't implement the Gadget API
14 * for the peripheral role; or OTG (that'd need much external circuitry).
16 * For documentation, see the SL811HS spec and the "SL811HS Embedded Host"
17 * document (providing significant pieces missing from that spec); plus
18 * the SL811S spec if you want peripheral side info.
22 * Status: Passed basic stress testing, works with hubs, mice, keyboards,
26 * - usb suspend/resume triggered by sl811
27 * - various issues noted in the code
28 * - performance work; use both register banks; ...
29 * - use urb->iso_frame_desc[] with ISO transfers
35 #include <linux/module.h>
36 #include <linux/moduleparam.h>
37 #include <linux/kernel.h>
38 #include <linux/delay.h>
39 #include <linux/ioport.h>
40 #include <linux/sched.h>
41 #include <linux/slab.h>
42 #include <linux/errno.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>
51 #include <linux/debugfs.h>
52 #include <linux/seq_file.h>
56 #include <asm/byteorder.h>
57 #include <asm/unaligned.h>
62 MODULE_DESCRIPTION("SL811HS USB Host Controller Driver");
63 MODULE_LICENSE("GPL");
64 MODULE_ALIAS("platform:sl811-hcd");
66 #define DRIVER_VERSION "19 May 2005"
68 /* for now, use only one transfer register bank */
74 static const char hcd_name[] = "sl811-hcd";
76 /*-------------------------------------------------------------------------*/
78 static void port_power(struct sl811 *sl811, int is_on)
80 struct usb_hcd *hcd = sl811_to_hcd(sl811);
82 /* hub is inactive unless the port is powered */
84 if (sl811->port1 & USB_PORT_STAT_POWER)
87 sl811->port1 = USB_PORT_STAT_POWER;
88 sl811->irq_enable = SL11H_INTMASK_INSRMV;
91 sl811->irq_enable = 0;
92 hcd->state = HC_STATE_HALT;
95 sl811_write(sl811, SL11H_IRQ_ENABLE, 0);
96 sl811_write(sl811, SL11H_IRQ_STATUS, ~0);
98 if (sl811->board && sl811->board->port_power) {
99 /* switch VBUS, at 500mA unless hub power budget gets set */
100 dev_dbg(hcd->self.controller, "power %s\n",
101 is_on ? "on" : "off");
102 sl811->board->port_power(hcd->self.controller, is_on);
105 /* reset as thoroughly as we can */
106 if (sl811->board && sl811->board->reset)
107 sl811->board->reset(hcd->self.controller);
109 sl811_write(sl811, SL11H_CTLREG1, SL11H_CTL1MASK_SE0);
113 sl811_write(sl811, SL11H_IRQ_ENABLE, 0);
114 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
115 sl811_write(sl811, SL811HS_CTLREG2, SL811HS_CTL2_INIT);
116 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
118 // if !is_on, put into lowpower mode now
121 /*-------------------------------------------------------------------------*/
123 /* This is a PIO-only HCD. Queueing appends URBs to the endpoint's queue,
124 * and may start I/O. Endpoint queues are scanned during completion irq
125 * handlers (one per packet: ACK, NAK, faults, etc) and urb cancellation.
127 * Using an external DMA engine to copy a packet at a time could work,
128 * though setup/teardown costs may be too big to make it worthwhile.
131 /* SETUP starts a new control request. Devices are not allowed to
132 * STALL or NAK these; they must cancel any pending control requests.
134 static void setup_packet(
136 struct sl811h_ep *ep,
144 void __iomem *data_reg;
146 addr = SL811HS_PACKET_BUF(bank == 0);
147 len = sizeof(struct usb_ctrlrequest);
148 data_reg = sl811->data_reg;
149 sl811_write_buf(sl811, addr, urb->setup_packet, len);
151 /* autoincrementing */
152 sl811_write(sl811, bank + SL11H_BUFADDRREG, addr);
153 writeb(len, data_reg);
154 writeb(SL_SETUP /* | ep->epnum */, data_reg);
155 writeb(usb_pipedevice(urb->pipe), data_reg);
157 /* always OUT/data0 */
158 sl811_write(sl811, bank + SL11H_HOSTCTLREG,
159 control | SL11H_HCTLMASK_OUT);
161 PACKET("SETUP qh%p\n", ep);
164 /* STATUS finishes control requests, often after IN or OUT data packets */
165 static void status_packet(
167 struct sl811h_ep *ep,
174 void __iomem *data_reg;
176 do_out = urb->transfer_buffer_length && usb_pipein(urb->pipe);
177 data_reg = sl811->data_reg;
179 /* autoincrementing */
180 sl811_write(sl811, bank + SL11H_BUFADDRREG, 0);
182 writeb((do_out ? SL_OUT : SL_IN) /* | ep->epnum */, data_reg);
183 writeb(usb_pipedevice(urb->pipe), data_reg);
185 /* always data1; sometimes IN */
186 control |= SL11H_HCTLMASK_TOGGLE;
188 control |= SL11H_HCTLMASK_OUT;
189 sl811_write(sl811, bank + SL11H_HOSTCTLREG, control);
191 PACKET("STATUS%s/%s qh%p\n", ep->nak_count ? "/retry" : "",
192 do_out ? "out" : "in", ep);
195 /* IN packets can be used with any type of endpoint. here we just
196 * start the transfer, data from the peripheral may arrive later.
197 * urb->iso_frame_desc is currently ignored here...
199 static void in_packet(
201 struct sl811h_ep *ep,
209 void __iomem *data_reg;
211 /* avoid losing data on overflow */
213 addr = SL811HS_PACKET_BUF(bank == 0);
214 if (!(control & SL11H_HCTLMASK_ISOCH)
215 && usb_gettoggle(urb->dev, ep->epnum, 0))
216 control |= SL11H_HCTLMASK_TOGGLE;
217 data_reg = sl811->data_reg;
219 /* autoincrementing */
220 sl811_write(sl811, bank + SL11H_BUFADDRREG, addr);
221 writeb(len, data_reg);
222 writeb(SL_IN | ep->epnum, data_reg);
223 writeb(usb_pipedevice(urb->pipe), data_reg);
225 sl811_write(sl811, bank + SL11H_HOSTCTLREG, control);
226 ep->length = min_t(u32, len,
227 urb->transfer_buffer_length - urb->actual_length);
228 PACKET("IN%s/%d qh%p len%d\n", ep->nak_count ? "/retry" : "",
229 !!usb_gettoggle(urb->dev, ep->epnum, 0), ep, len);
232 /* OUT packets can be used with any type of endpoint.
233 * urb->iso_frame_desc is currently ignored here...
235 static void out_packet(
237 struct sl811h_ep *ep,
246 void __iomem *data_reg;
248 buf = urb->transfer_buffer + urb->actual_length;
251 len = min_t(u32, ep->maxpacket,
252 urb->transfer_buffer_length - urb->actual_length);
254 if (!(control & SL11H_HCTLMASK_ISOCH)
255 && usb_gettoggle(urb->dev, ep->epnum, 1))
256 control |= SL11H_HCTLMASK_TOGGLE;
257 addr = SL811HS_PACKET_BUF(bank == 0);
258 data_reg = sl811->data_reg;
260 sl811_write_buf(sl811, addr, buf, len);
262 /* autoincrementing */
263 sl811_write(sl811, bank + SL11H_BUFADDRREG, addr);
264 writeb(len, data_reg);
265 writeb(SL_OUT | ep->epnum, data_reg);
266 writeb(usb_pipedevice(urb->pipe), data_reg);
268 sl811_write(sl811, bank + SL11H_HOSTCTLREG,
269 control | SL11H_HCTLMASK_OUT);
271 PACKET("OUT%s/%d qh%p len%d\n", ep->nak_count ? "/retry" : "",
272 !!usb_gettoggle(urb->dev, ep->epnum, 1), ep, len);
275 /*-------------------------------------------------------------------------*/
277 /* caller updates on-chip enables later */
279 static inline void sofirq_on(struct sl811 *sl811)
281 if (sl811->irq_enable & SL11H_INTMASK_SOFINTR)
283 dev_dbg(sl811_to_hcd(sl811)->self.controller, "sof irq on\n");
284 sl811->irq_enable |= SL11H_INTMASK_SOFINTR;
287 static inline void sofirq_off(struct sl811 *sl811)
289 if (!(sl811->irq_enable & SL11H_INTMASK_SOFINTR))
291 dev_dbg(sl811_to_hcd(sl811)->self.controller, "sof irq off\n");
292 sl811->irq_enable &= ~SL11H_INTMASK_SOFINTR;
295 /*-------------------------------------------------------------------------*/
297 /* pick the next endpoint for a transaction, and issue it.
298 * frames start with periodic transfers (after whatever is pending
299 * from the previous frame), and the rest of the time is async
300 * transfers, scheduled round-robin.
302 static struct sl811h_ep *start(struct sl811 *sl811, u8 bank)
304 struct sl811h_ep *ep;
309 /* use endpoint at schedule head */
310 if (sl811->next_periodic) {
311 ep = sl811->next_periodic;
312 sl811->next_periodic = ep->next;
314 if (sl811->next_async)
315 ep = sl811->next_async;
316 else if (!list_empty(&sl811->async))
317 ep = container_of(sl811->async.next,
318 struct sl811h_ep, schedule);
320 /* could set up the first fullspeed periodic
321 * transfer for the next frame ...
327 if ((bank && sl811->active_b == ep) || sl811->active_a == ep)
331 if (ep->schedule.next == &sl811->async)
332 sl811->next_async = NULL;
334 sl811->next_async = container_of(ep->schedule.next,
335 struct sl811h_ep, schedule);
338 if (unlikely(list_empty(&ep->hep->urb_list))) {
339 dev_dbg(sl811_to_hcd(sl811)->self.controller,
340 "empty %p queue?\n", ep);
344 urb = container_of(ep->hep->urb_list.next, struct urb, urb_list);
345 control = ep->defctrl;
347 /* if this frame doesn't have enough time left to transfer this
348 * packet, wait till the next frame. too-simple algorithm...
350 fclock = sl811_read(sl811, SL11H_SOFTMRREG) << 6;
351 fclock -= 100; /* setup takes not much time */
352 if (urb->dev->speed == USB_SPEED_LOW) {
353 if (control & SL11H_HCTLMASK_PREAMBLE) {
354 /* also note erratum 1: some hubs won't work */
357 fclock -= ep->maxpacket << 8;
359 /* erratum 2: AFTERSOF only works for fullspeed */
362 sl811->stat_overrun++;
367 fclock -= 12000 / 19; /* 19 64byte packets/msec */
370 sl811->stat_overrun++;
371 control |= SL11H_HCTLMASK_AFTERSOF;
373 /* throttle bulk/control irq noise */
374 } else if (ep->nak_count)
375 control |= SL11H_HCTLMASK_AFTERSOF;
379 switch (ep->nextpid) {
381 in_packet(sl811, ep, urb, bank, control);
384 out_packet(sl811, ep, urb, bank, control);
387 setup_packet(sl811, ep, urb, bank, control);
389 case USB_PID_ACK: /* for control status */
390 status_packet(sl811, ep, urb, bank, control);
393 dev_dbg(sl811_to_hcd(sl811)->self.controller,
394 "bad ep%p pid %02x\n", ep, ep->nextpid);
400 #define MIN_JIFFIES ((msecs_to_jiffies(2) > 1) ? msecs_to_jiffies(2) : 2)
402 static inline void start_transfer(struct sl811 *sl811)
404 if (sl811->port1 & USB_PORT_STAT_SUSPEND)
406 if (sl811->active_a == NULL) {
407 sl811->active_a = start(sl811, SL811_EP_A(SL811_HOST_BUF));
408 if (sl811->active_a != NULL)
409 sl811->jiffies_a = jiffies + MIN_JIFFIES;
412 if (sl811->active_b == NULL) {
413 sl811->active_b = start(sl811, SL811_EP_B(SL811_HOST_BUF));
414 if (sl811->active_b != NULL)
415 sl811->jiffies_b = jiffies + MIN_JIFFIES;
420 static void finish_request(
422 struct sl811h_ep *ep,
425 ) __releases(sl811->lock) __acquires(sl811->lock)
429 if (usb_pipecontrol(urb->pipe))
430 ep->nextpid = USB_PID_SETUP;
432 usb_hcd_unlink_urb_from_ep(sl811_to_hcd(sl811), urb);
433 spin_unlock(&sl811->lock);
434 usb_hcd_giveback_urb(sl811_to_hcd(sl811), urb, status);
435 spin_lock(&sl811->lock);
437 /* leave active endpoints in the schedule */
438 if (!list_empty(&ep->hep->urb_list))
441 /* async deschedule? */
442 if (!list_empty(&ep->schedule)) {
443 list_del_init(&ep->schedule);
444 if (ep == sl811->next_async)
445 sl811->next_async = NULL;
449 /* periodic deschedule */
450 dev_dbg(sl811_to_hcd(sl811)->self.controller,
451 "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 dev_dbg(sl811_to_hcd(sl811)->self.controller,
598 "%s DONE_A: ctrl %02x sts %02x\n",
599 (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost",
601 sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG)));
602 irqstat |= SL11H_INTMASK_DONE_A;
605 if (sl811->active_b && time_before_eq(sl811->jiffies_b, jiffies)) {
606 ctl = sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG));
607 if (ctl & SL11H_HCTLMASK_ARM)
608 sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0);
609 dev_dbg(sl811_to_hcd(sl811)->self.controller,
610 "%s DONE_B: ctrl %02x sts %02x\n",
611 (ctl & SL11H_HCTLMASK_ARM) ? "timeout" : "lost",
613 sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG)));
614 irqstat |= SL11H_INTMASK_DONE_A;
620 static irqreturn_t sl811h_irq(struct usb_hcd *hcd)
622 struct sl811 *sl811 = hcd_to_sl811(hcd);
624 irqreturn_t ret = IRQ_NONE;
625 unsigned retries = 5;
627 spin_lock(&sl811->lock);
630 irqstat = sl811_read(sl811, SL11H_IRQ_STATUS) & ~SL11H_INTMASK_DP;
632 sl811_write(sl811, SL11H_IRQ_STATUS, irqstat);
633 irqstat &= sl811->irq_enable;
637 /* this may no longer be necessary ... */
639 irqstat = checkdone(sl811);
645 /* USB packets, not necessarily handled in the order they're
646 * issued ... that's fine if they're different endpoints.
648 if (irqstat & SL11H_INTMASK_DONE_A) {
649 done(sl811, sl811->active_a, SL811_EP_A(SL811_HOST_BUF));
650 sl811->active_a = NULL;
654 if (irqstat & SL11H_INTMASK_DONE_B) {
655 done(sl811, sl811->active_b, SL811_EP_B(SL811_HOST_BUF));
656 sl811->active_b = NULL;
660 if (irqstat & SL11H_INTMASK_SOFINTR) {
663 index = sl811->frame++ % (PERIODIC_SIZE - 1);
666 /* be graceful about almost-inevitable periodic schedule
667 * overruns: continue the previous frame's transfers iff
668 * this one has nothing scheduled.
670 if (sl811->next_periodic) {
671 // dev_err(hcd->self.controller, "overrun to slot %d\n", index);
672 sl811->stat_overrun++;
674 if (sl811->periodic[index])
675 sl811->next_periodic = sl811->periodic[index];
678 /* hub_wq manages debouncing and wakeup */
679 if (irqstat & SL11H_INTMASK_INSRMV) {
680 sl811->stat_insrmv++;
682 /* most stats are reset for each VBUS session */
683 sl811->stat_wake = 0;
687 sl811->stat_lost = 0;
690 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
692 sl811->irq_enable = SL11H_INTMASK_INSRMV;
693 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
695 /* usbcore nukes other pending transactions on disconnect */
696 if (sl811->active_a) {
697 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG), 0);
698 finish_request(sl811, sl811->active_a,
699 container_of(sl811->active_a
700 ->hep->urb_list.next,
701 struct urb, urb_list),
703 sl811->active_a = NULL;
706 if (sl811->active_b) {
707 sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG), 0);
708 finish_request(sl811, sl811->active_b,
709 container_of(sl811->active_b
710 ->hep->urb_list.next,
711 struct urb, urb_list),
713 sl811->active_b = NULL;
717 /* port status seems weird until after reset, so
718 * force the reset and make hub_wq clean up later.
720 if (irqstat & SL11H_INTMASK_RD)
721 sl811->port1 &= ~USB_PORT_STAT_CONNECTION;
723 sl811->port1 |= USB_PORT_STAT_CONNECTION;
725 sl811->port1 |= USB_PORT_STAT_C_CONNECTION << 16;
727 } else if (irqstat & SL11H_INTMASK_RD) {
728 if (sl811->port1 & USB_PORT_STAT_SUSPEND) {
729 dev_dbg(hcd->self.controller, "wakeup\n");
730 sl811->port1 |= USB_PORT_STAT_C_SUSPEND << 16;
733 irqstat &= ~SL11H_INTMASK_RD;
737 if (sl811->port1 & USB_PORT_STAT_ENABLE)
738 start_transfer(sl811);
744 if (sl811->periodic_count == 0 && list_empty(&sl811->async))
746 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
748 spin_unlock(&sl811->lock);
753 /*-------------------------------------------------------------------------*/
755 /* usb 1.1 says max 90% of a frame is available for periodic transfers.
756 * this driver doesn't promise that much since it's got to handle an
757 * IRQ per packet; irq handling latencies also use up that time.
759 * NOTE: the periodic schedule is a sparse tree, with the load for
760 * each branch minimized. see fig 3.5 in the OHCI spec for example.
762 #define MAX_PERIODIC_LOAD 500 /* out of 1000 usec */
764 static int balance(struct sl811 *sl811, u16 period, u16 load)
766 int i, branch = -ENOSPC;
768 /* search for the least loaded schedule branch of that period
769 * which has enough bandwidth left unreserved.
771 for (i = 0; i < period ; i++) {
772 if (branch < 0 || sl811->load[branch] > sl811->load[i]) {
775 for (j = i; j < PERIODIC_SIZE; j += period) {
776 if ((sl811->load[j] + load)
780 if (j < PERIODIC_SIZE)
788 /*-------------------------------------------------------------------------*/
790 static int sl811h_urb_enqueue(
795 struct sl811 *sl811 = hcd_to_sl811(hcd);
796 struct usb_device *udev = urb->dev;
797 unsigned int pipe = urb->pipe;
798 int is_out = !usb_pipein(pipe);
799 int type = usb_pipetype(pipe);
800 int epnum = usb_pipeendpoint(pipe);
801 struct sl811h_ep *ep = NULL;
805 struct usb_host_endpoint *hep = urb->ep;
807 #ifndef CONFIG_USB_SL811_HCD_ISO
808 if (type == PIPE_ISOCHRONOUS)
812 /* avoid all allocations within spinlocks */
814 ep = kzalloc(sizeof *ep, mem_flags);
819 spin_lock_irqsave(&sl811->lock, flags);
821 /* don't submit to a dead or disabled port */
822 if (!(sl811->port1 & USB_PORT_STAT_ENABLE)
823 || !HC_IS_RUNNING(hcd->state)) {
826 goto fail_not_linked;
828 retval = usb_hcd_link_urb_to_ep(hcd, urb);
831 goto fail_not_linked;
842 INIT_LIST_HEAD(&ep->schedule);
845 ep->maxpacket = usb_maxpacket(udev, urb->pipe, is_out);
846 ep->defctrl = SL11H_HCTLMASK_ARM | SL11H_HCTLMASK_ENABLE;
847 usb_settoggle(udev, epnum, is_out, 0);
849 if (type == PIPE_CONTROL)
850 ep->nextpid = USB_PID_SETUP;
852 ep->nextpid = USB_PID_OUT;
854 ep->nextpid = USB_PID_IN;
856 if (ep->maxpacket > H_MAXPACKET) {
857 /* iso packets up to 240 bytes could work... */
858 dev_dbg(hcd->self.controller,
859 "dev %d ep%d maxpacket %d\n", udev->devnum,
860 epnum, ep->maxpacket);
866 if (udev->speed == USB_SPEED_LOW) {
867 /* send preamble for external hub? */
868 if (!(sl811->ctrl1 & SL11H_CTL1MASK_LSPD))
869 ep->defctrl |= SL11H_HCTLMASK_PREAMBLE;
872 case PIPE_ISOCHRONOUS:
874 if (urb->interval > PERIODIC_SIZE)
875 urb->interval = PERIODIC_SIZE;
876 ep->period = urb->interval;
877 ep->branch = PERIODIC_SIZE;
878 if (type == PIPE_ISOCHRONOUS)
879 ep->defctrl |= SL11H_HCTLMASK_ISOCH;
880 ep->load = usb_calc_bus_time(udev->speed, !is_out,
881 (type == PIPE_ISOCHRONOUS),
882 usb_maxpacket(udev, pipe, is_out))
891 /* maybe put endpoint into schedule */
895 if (list_empty(&ep->schedule))
896 list_add_tail(&ep->schedule, &sl811->async);
898 case PIPE_ISOCHRONOUS:
900 urb->interval = ep->period;
901 if (ep->branch < PERIODIC_SIZE) {
902 /* NOTE: the phase is correct here, but the value
903 * needs offsetting by the transfer queue depth.
904 * All current drivers ignore start_frame, so this
905 * is unlikely to ever matter...
907 urb->start_frame = (sl811->frame & (PERIODIC_SIZE - 1))
912 retval = balance(sl811, ep->period, ep->load);
917 urb->start_frame = (sl811->frame & (PERIODIC_SIZE - 1))
920 /* sort each schedule branch by period (slow before fast)
921 * to share the faster parts of the tree without needing
922 * dummy/placeholder nodes
924 dev_dbg(hcd->self.controller, "schedule qh%d/%p branch %d\n",
925 ep->period, ep, ep->branch);
926 for (i = ep->branch; i < PERIODIC_SIZE; i += ep->period) {
927 struct sl811h_ep **prev = &sl811->periodic[i];
928 struct sl811h_ep *here = *prev;
930 while (here && ep != here) {
931 if (ep->period > here->period)
940 sl811->load[i] += ep->load;
942 sl811->periodic_count++;
943 hcd->self.bandwidth_allocated += ep->load / ep->period;
948 start_transfer(sl811);
949 sl811_write(sl811, SL11H_IRQ_ENABLE, sl811->irq_enable);
952 usb_hcd_unlink_urb_from_ep(hcd, urb);
954 spin_unlock_irqrestore(&sl811->lock, flags);
958 static int sl811h_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
960 struct sl811 *sl811 = hcd_to_sl811(hcd);
961 struct usb_host_endpoint *hep;
963 struct sl811h_ep *ep;
966 spin_lock_irqsave(&sl811->lock, flags);
967 retval = usb_hcd_check_unlink_urb(hcd, urb, status);
974 /* finish right away if this urb can't be active ...
975 * note that some drivers wrongly expect delays
977 if (ep->hep->urb_list.next != &urb->urb_list) {
978 /* not front of queue? never active */
980 /* for active transfers, we expect an IRQ */
981 } else if (sl811->active_a == ep) {
982 if (time_before_eq(sl811->jiffies_a, jiffies)) {
983 /* happens a lot with lowspeed?? */
984 dev_dbg(hcd->self.controller,
985 "giveup on DONE_A: ctrl %02x sts %02x\n",
987 SL811_EP_A(SL11H_HOSTCTLREG)),
989 SL811_EP_A(SL11H_PKTSTATREG)));
990 sl811_write(sl811, SL811_EP_A(SL11H_HOSTCTLREG),
992 sl811->active_a = NULL;
996 } else if (sl811->active_b == ep) {
997 if (time_before_eq(sl811->jiffies_a, jiffies)) {
998 /* happens a lot with lowspeed?? */
999 dev_dbg(hcd->self.controller,
1000 "giveup on DONE_B: ctrl %02x sts %02x\n",
1002 SL811_EP_B(SL11H_HOSTCTLREG)),
1004 SL811_EP_B(SL11H_PKTSTATREG)));
1005 sl811_write(sl811, SL811_EP_B(SL11H_HOSTCTLREG),
1007 sl811->active_b = NULL;
1012 /* front of queue for inactive endpoint */
1016 finish_request(sl811, ep, urb, 0);
1018 dev_dbg(sl811_to_hcd(sl811)->self.controller,
1019 "dequeue, urb %p active %s; wait4irq\n", urb,
1020 (sl811->active_a == ep) ? "A" : "B");
1024 spin_unlock_irqrestore(&sl811->lock, flags);
1029 sl811h_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *hep)
1031 struct sl811h_ep *ep = hep->hcpriv;
1036 /* assume we'd just wait for the irq */
1037 if (!list_empty(&hep->urb_list))
1039 if (!list_empty(&hep->urb_list))
1040 dev_warn(hcd->self.controller, "ep %p not empty?\n", ep);
1047 sl811h_get_frame(struct usb_hcd *hcd)
1049 struct sl811 *sl811 = hcd_to_sl811(hcd);
1051 /* wrong except while periodic transfers are scheduled;
1052 * never matches the on-the-wire frame;
1053 * subject to overruns.
1055 return sl811->frame;
1059 /*-------------------------------------------------------------------------*/
1061 /* the virtual root hub timer IRQ checks for hub status */
1063 sl811h_hub_status_data(struct usb_hcd *hcd, char *buf)
1065 struct sl811 *sl811 = hcd_to_sl811(hcd);
1067 unsigned long flags;
1069 /* non-SMP HACK: use root hub timer as i/o watchdog
1070 * this seems essential when SOF IRQs aren't in use...
1072 local_irq_save(flags);
1073 if (!timer_pending(&sl811->timer)) {
1074 if (sl811h_irq( /* ~0, */ hcd) != IRQ_NONE)
1077 local_irq_restore(flags);
1080 if (!(sl811->port1 & (0xffff << 16)))
1083 /* tell hub_wq port 1 changed */
1089 sl811h_hub_descriptor (
1090 struct sl811 *sl811,
1091 struct usb_hub_descriptor *desc
1095 desc->bDescriptorType = USB_DT_HUB;
1096 desc->bHubContrCurrent = 0;
1098 desc->bNbrPorts = 1;
1099 desc->bDescLength = 9;
1101 /* per-port power switching (gang of one!), or none */
1102 desc->bPwrOn2PwrGood = 0;
1103 if (sl811->board && sl811->board->port_power) {
1104 desc->bPwrOn2PwrGood = sl811->board->potpg;
1105 if (!desc->bPwrOn2PwrGood)
1106 desc->bPwrOn2PwrGood = 10;
1107 temp = HUB_CHAR_INDV_PORT_LPSM;
1109 temp = HUB_CHAR_NO_LPSM;
1111 /* no overcurrent errors detection/handling */
1112 temp |= HUB_CHAR_NO_OCPM;
1114 desc->wHubCharacteristics = cpu_to_le16(temp);
1116 /* ports removable, and legacy PortPwrCtrlMask */
1117 desc->u.hs.DeviceRemovable[0] = 0 << 1;
1118 desc->u.hs.DeviceRemovable[1] = ~0;
1122 sl811h_timer(struct timer_list *t)
1124 struct sl811 *sl811 = from_timer(sl811, t, timer);
1125 unsigned long flags;
1127 u8 signaling = sl811->ctrl1 & SL11H_CTL1MASK_FORCE;
1128 const u32 mask = USB_PORT_STAT_CONNECTION
1129 | USB_PORT_STAT_ENABLE
1130 | USB_PORT_STAT_LOW_SPEED;
1132 spin_lock_irqsave(&sl811->lock, flags);
1134 /* stop special signaling */
1135 sl811->ctrl1 &= ~SL11H_CTL1MASK_FORCE;
1136 sl811_write(sl811, SL11H_CTLREG1, sl811->ctrl1);
1139 irqstat = sl811_read(sl811, SL11H_IRQ_STATUS);
1141 switch (signaling) {
1142 case SL11H_CTL1MASK_SE0:
1143 dev_dbg(sl811_to_hcd(sl811)->self.controller, "end reset\n");
1144 sl811->port1 = (USB_PORT_STAT_C_RESET << 16)
1145 | USB_PORT_STAT_POWER;
1147 /* don't wrongly ack RD */
1148 if (irqstat & SL11H_INTMASK_INSRMV)
1149 irqstat &= ~SL11H_INTMASK_RD;
1151 case SL11H_CTL1MASK_K:
1152 dev_dbg(sl811_to_hcd(sl811)->self.controller, "end resume\n");
1153 sl811->port1 &= ~USB_PORT_STAT_SUSPEND;
1156 dev_dbg(sl811_to_hcd(sl811)->self.controller,
1157 "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 & USB_PORT_STAT_CONNECTION)
1165 sl811->port1 |= (USB_PORT_STAT_C_CONNECTION << 16)
1166 | (USB_PORT_STAT_C_ENABLE << 16);
1167 sl811->port1 &= ~mask;
1168 sl811->irq_enable = SL11H_INTMASK_INSRMV;
1170 sl811->port1 |= mask;
1171 if (irqstat & SL11H_INTMASK_DP)
1172 sl811->port1 &= ~USB_PORT_STAT_LOW_SPEED;
1173 sl811->irq_enable = SL11H_INTMASK_INSRMV | SL11H_INTMASK_RD;
1176 if (sl811->port1 & USB_PORT_STAT_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 & USB_PORT_STAT_LOW_SPEED) {
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 /* hub_wq 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 &= USB_PORT_STAT_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 & USB_PORT_STAT_SUSPEND))
1254 /* 20 msec of resume/K signaling, other irqs blocked */
1255 dev_dbg(hcd->self.controller, "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(USB_RESUME_TIMEOUT));
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 put_unaligned_le32(0, buf);
1288 put_unaligned_le32(sl811->port1, buf);
1290 if (__is_defined(VERBOSE) ||
1291 *(u16*)(buf+2)) /* only if wPortChange is interesting */
1292 dev_dbg(hcd->self.controller, "GetPortStatus %08x\n",
1295 case SetPortFeature:
1296 if (wIndex != 1 || wLength != 0)
1299 case USB_PORT_FEAT_SUSPEND:
1300 if (sl811->port1 & USB_PORT_STAT_RESET)
1302 if (!(sl811->port1 & USB_PORT_STAT_ENABLE))
1305 dev_dbg(hcd->self.controller,"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 & USB_PORT_STAT_SUSPEND)
1315 if (!(sl811->port1 & USB_PORT_STAT_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 |= USB_PORT_STAT_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 dev_dbg(hcd->self.controller, "%s\n", __func__);
1355 sl811h_bus_resume(struct usb_hcd *hcd)
1358 dev_dbg(hcd->self.controller, "%s\n", __func__);
1364 #define sl811h_bus_suspend NULL
1365 #define sl811h_bus_resume NULL
1370 /*-------------------------------------------------------------------------*/
1372 static void dump_irq(struct seq_file *s, char *label, u8 mask)
1374 seq_printf(s, "%s %02x%s%s%s%s%s%s\n", label, mask,
1375 (mask & SL11H_INTMASK_DONE_A) ? " done_a" : "",
1376 (mask & SL11H_INTMASK_DONE_B) ? " done_b" : "",
1377 (mask & SL11H_INTMASK_SOFINTR) ? " sof" : "",
1378 (mask & SL11H_INTMASK_INSRMV) ? " ins/rmv" : "",
1379 (mask & SL11H_INTMASK_RD) ? " rd" : "",
1380 (mask & SL11H_INTMASK_DP) ? " dp" : "");
1383 static int sl811h_debug_show(struct seq_file *s, void *unused)
1385 struct sl811 *sl811 = s->private;
1386 struct sl811h_ep *ep;
1389 seq_printf(s, "%s\n%s version %s\nportstatus[1] = %08x\n",
1390 sl811_to_hcd(sl811)->product_desc,
1391 hcd_name, DRIVER_VERSION,
1394 seq_printf(s, "insert/remove: %ld\n", sl811->stat_insrmv);
1395 seq_printf(s, "current session: done_a %ld done_b %ld "
1396 "wake %ld sof %ld overrun %ld lost %ld\n\n",
1397 sl811->stat_a, sl811->stat_b,
1398 sl811->stat_wake, sl811->stat_sof,
1399 sl811->stat_overrun, sl811->stat_lost);
1401 spin_lock_irq(&sl811->lock);
1403 if (sl811->ctrl1 & SL11H_CTL1MASK_SUSPEND)
1404 seq_printf(s, "(suspended)\n\n");
1406 u8 t = sl811_read(sl811, SL11H_CTLREG1);
1408 seq_printf(s, "ctrl1 %02x%s%s%s%s\n", t,
1409 (t & SL11H_CTL1MASK_SOF_ENA) ? " sofgen" : "",
1410 ({char *s; switch (t & SL11H_CTL1MASK_FORCE) {
1411 case SL11H_CTL1MASK_NORMAL: s = ""; break;
1412 case SL11H_CTL1MASK_SE0: s = " se0/reset"; break;
1413 case SL11H_CTL1MASK_K: s = " k/resume"; break;
1414 default: s = "j"; break;
1416 (t & SL11H_CTL1MASK_LSPD) ? " lowspeed" : "",
1417 (t & SL11H_CTL1MASK_SUSPEND) ? " suspend" : "");
1419 dump_irq(s, "irq_enable",
1420 sl811_read(sl811, SL11H_IRQ_ENABLE));
1421 dump_irq(s, "irq_status",
1422 sl811_read(sl811, SL11H_IRQ_STATUS));
1423 seq_printf(s, "frame clocks remaining: %d\n",
1424 sl811_read(sl811, SL11H_SOFTMRREG) << 6);
1427 seq_printf(s, "A: qh%p ctl %02x sts %02x\n", sl811->active_a,
1428 sl811_read(sl811, SL811_EP_A(SL11H_HOSTCTLREG)),
1429 sl811_read(sl811, SL811_EP_A(SL11H_PKTSTATREG)));
1430 seq_printf(s, "B: qh%p ctl %02x sts %02x\n", sl811->active_b,
1431 sl811_read(sl811, SL811_EP_B(SL11H_HOSTCTLREG)),
1432 sl811_read(sl811, SL811_EP_B(SL11H_PKTSTATREG)));
1433 seq_printf(s, "\n");
1434 list_for_each_entry (ep, &sl811->async, schedule) {
1437 seq_printf(s, "%s%sqh%p, ep%d%s, maxpacket %d"
1439 (ep == sl811->active_a) ? "(A) " : "",
1440 (ep == sl811->active_b) ? "(B) " : "",
1442 ({ char *s; switch (ep->nextpid) {
1443 case USB_PID_IN: s = "in"; break;
1444 case USB_PID_OUT: s = "out"; break;
1445 case USB_PID_SETUP: s = "setup"; break;
1446 case USB_PID_ACK: s = "status"; break;
1447 default: s = "?"; break;
1450 ep->nak_count, ep->error_count);
1451 list_for_each_entry (urb, &ep->hep->urb_list, urb_list) {
1452 seq_printf(s, " urb%p, %d/%d\n", urb,
1454 urb->transfer_buffer_length);
1457 if (!list_empty(&sl811->async))
1458 seq_printf(s, "\n");
1460 seq_printf(s, "periodic size= %d\n", PERIODIC_SIZE);
1462 for (i = 0; i < PERIODIC_SIZE; i++) {
1463 ep = sl811->periodic[i];
1466 seq_printf(s, "%2d [%3d]:\n", i, sl811->load[i]);
1468 /* DUMB: prints shared entries multiple times */
1471 " %s%sqh%d/%p (%sdev%d ep%d%s max %d) "
1473 (ep == sl811->active_a) ? "(A) " : "",
1474 (ep == sl811->active_b) ? "(B) " : "",
1476 (ep->udev->speed == USB_SPEED_FULL)
1478 ep->udev->devnum, ep->epnum,
1479 (ep->epnum == 0) ? ""
1480 : ((ep->nextpid == USB_PID_IN)
1483 ep->maxpacket, ep->error_count);
1488 spin_unlock_irq(&sl811->lock);
1489 seq_printf(s, "\n");
1493 DEFINE_SHOW_ATTRIBUTE(sl811h_debug);
1495 /* expect just one sl811 per system */
1496 static void create_debug_file(struct sl811 *sl811)
1498 debugfs_create_file("sl811h", S_IRUGO, usb_debug_root, sl811,
1499 &sl811h_debug_fops);
1502 static void remove_debug_file(struct sl811 *sl811)
1504 debugfs_remove(debugfs_lookup("sl811h", usb_debug_root));
1507 /*-------------------------------------------------------------------------*/
1510 sl811h_stop(struct usb_hcd *hcd)
1512 struct sl811 *sl811 = hcd_to_sl811(hcd);
1513 unsigned long flags;
1515 del_timer_sync(&hcd->rh_timer);
1517 spin_lock_irqsave(&sl811->lock, flags);
1518 port_power(sl811, 0);
1519 spin_unlock_irqrestore(&sl811->lock, flags);
1523 sl811h_start(struct usb_hcd *hcd)
1525 struct sl811 *sl811 = hcd_to_sl811(hcd);
1527 /* chip has been reset, VBUS power is off */
1528 hcd->state = HC_STATE_RUNNING;
1531 if (!device_can_wakeup(hcd->self.controller))
1532 device_init_wakeup(hcd->self.controller,
1533 sl811->board->can_wakeup);
1534 hcd->power_budget = sl811->board->power * 2;
1537 /* enable power and interrupts */
1538 port_power(sl811, 1);
1543 /*-------------------------------------------------------------------------*/
1545 static const struct hc_driver sl811h_hc_driver = {
1546 .description = hcd_name,
1547 .hcd_priv_size = sizeof(struct sl811),
1550 * generic hardware linkage
1553 .flags = HCD_USB11 | HCD_MEMORY,
1555 /* Basic lifecycle operations */
1556 .start = sl811h_start,
1557 .stop = sl811h_stop,
1560 * managing i/o requests and associated device resources
1562 .urb_enqueue = sl811h_urb_enqueue,
1563 .urb_dequeue = sl811h_urb_dequeue,
1564 .endpoint_disable = sl811h_endpoint_disable,
1567 * periodic schedule support
1569 .get_frame_number = sl811h_get_frame,
1574 .hub_status_data = sl811h_hub_status_data,
1575 .hub_control = sl811h_hub_control,
1576 .bus_suspend = sl811h_bus_suspend,
1577 .bus_resume = sl811h_bus_resume,
1580 /*-------------------------------------------------------------------------*/
1583 sl811h_remove(struct platform_device *dev)
1585 struct usb_hcd *hcd = platform_get_drvdata(dev);
1586 struct sl811 *sl811 = hcd_to_sl811(hcd);
1587 struct resource *res;
1589 remove_debug_file(sl811);
1590 usb_remove_hcd(hcd);
1592 /* some platforms may use IORESOURCE_IO */
1593 res = platform_get_resource(dev, IORESOURCE_MEM, 1);
1595 iounmap(sl811->data_reg);
1597 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
1599 iounmap(sl811->addr_reg);
1606 sl811h_probe(struct platform_device *dev)
1608 struct usb_hcd *hcd;
1609 struct sl811 *sl811;
1610 struct resource *addr, *data, *ires;
1612 void __iomem *addr_reg;
1613 void __iomem *data_reg;
1616 unsigned long irqflags;
1621 /* the chip may be wired for either kind of addressing */
1622 addr = platform_get_mem_or_io(dev, 0);
1623 data = platform_get_mem_or_io(dev, 1);
1624 if (!addr || !data || resource_type(addr) != resource_type(data))
1627 /* basic sanity checks first. board-specific init logic should
1628 * have initialized these three resources and probably board
1629 * specific platform_data. we don't probe for IRQs, and do only
1630 * minimal sanity checking.
1632 ires = platform_get_resource(dev, IORESOURCE_IRQ, 0);
1633 if (dev->num_resources < 3 || !ires)
1637 irqflags = ires->flags & IRQF_TRIGGER_MASK;
1639 ioaddr = resource_type(addr) == IORESOURCE_IO;
1642 * NOTE: 64-bit resource->start is getting truncated
1643 * to avoid compiler warning, assuming that ->start
1644 * is always 32-bit for this case
1646 addr_reg = (void __iomem *) (unsigned long) addr->start;
1647 data_reg = (void __iomem *) (unsigned long) data->start;
1649 addr_reg = ioremap(addr->start, 1);
1650 if (addr_reg == NULL) {
1655 data_reg = ioremap(data->start, 1);
1656 if (data_reg == NULL) {
1662 /* allocate and initialize hcd */
1663 hcd = usb_create_hcd(&sl811h_hc_driver, &dev->dev, dev_name(&dev->dev));
1668 hcd->rsrc_start = addr->start;
1669 sl811 = hcd_to_sl811(hcd);
1671 spin_lock_init(&sl811->lock);
1672 INIT_LIST_HEAD(&sl811->async);
1673 sl811->board = dev_get_platdata(&dev->dev);
1674 timer_setup(&sl811->timer, sl811h_timer, 0);
1675 sl811->addr_reg = addr_reg;
1676 sl811->data_reg = data_reg;
1678 spin_lock_irq(&sl811->lock);
1679 port_power(sl811, 0);
1680 spin_unlock_irq(&sl811->lock);
1683 tmp = sl811_read(sl811, SL11H_HWREVREG);
1686 hcd->product_desc = "SL811HS v1.2";
1689 hcd->product_desc = "SL811HS v1.5";
1692 /* reject case 0, SL11S is less functional */
1693 dev_dbg(&dev->dev, "chiprev %02x\n", tmp);
1698 /* The chip's IRQ is level triggered, active high. A requirement
1699 * for platform device setup is to cope with things like signal
1700 * inverters (e.g. CF is active low) or working only with edge
1701 * triggers (e.g. most ARM CPUs). Initial driver stress testing
1702 * was on a system with single edge triggering, so most sorts of
1703 * triggering arrangement should work.
1705 * Use resource IRQ flags if set by platform device setup.
1707 irqflags |= IRQF_SHARED;
1708 retval = usb_add_hcd(hcd, irq, irqflags);
1712 device_wakeup_enable(hcd->self.controller);
1714 create_debug_file(sl811);
1726 dev_dbg(&dev->dev, "init error, %d\n", retval);
1732 /* for this device there's no useful distinction between the controller
1737 sl811h_suspend(struct platform_device *dev, pm_message_t state)
1739 struct usb_hcd *hcd = platform_get_drvdata(dev);
1740 struct sl811 *sl811 = hcd_to_sl811(hcd);
1743 switch (state.event) {
1744 case PM_EVENT_FREEZE:
1745 retval = sl811h_bus_suspend(hcd);
1747 case PM_EVENT_SUSPEND:
1748 case PM_EVENT_HIBERNATE:
1749 case PM_EVENT_PRETHAW: /* explicitly discard hw state */
1750 port_power(sl811, 0);
1757 sl811h_resume(struct platform_device *dev)
1759 struct usb_hcd *hcd = platform_get_drvdata(dev);
1760 struct sl811 *sl811 = hcd_to_sl811(hcd);
1762 /* with no "check to see if VBUS is still powered" board hook,
1763 * let's assume it'd only be powered to enable remote wakeup.
1765 if (!sl811->port1 || !device_can_wakeup(&hcd->self.root_hub->dev)) {
1767 port_power(sl811, 1);
1768 usb_root_hub_lost_power(hcd->self.root_hub);
1772 return sl811h_bus_resume(hcd);
1777 #define sl811h_suspend NULL
1778 #define sl811h_resume NULL
1783 /* this driver is exported so sl811_cs can depend on it */
1784 struct platform_driver sl811h_driver = {
1785 .probe = sl811h_probe,
1786 .remove = sl811h_remove,
1788 .suspend = sl811h_suspend,
1789 .resume = sl811h_resume,
1794 EXPORT_SYMBOL(sl811h_driver);
1796 module_platform_driver(sl811h_driver);