summaryrefslogtreecommitdiffstats
path: root/drivers/usb/host/fhci-hcd.c
blob: 1f666804fa9134af5400656f6888ac423a4a030a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
// SPDX-License-Identifier: GPL-2.0+
/*
 * Freescale QUICC Engine USB Host Controller Driver
 *
 * Copyright (c) Freescale Semicondutor, Inc. 2006.
 *               Shlomi Gridish <gridish@freescale.com>
 *               Jerry Huang <Chang-Ming.Huang@freescale.com>
 * Copyright (c) Logic Product Development, Inc. 2007
 *               Peter Barada <peterb@logicpd.com>
 * Copyright (c) MontaVista Software, Inc. 2008.
 *               Anton Vorontsov <avorontsov@ru.mvista.com>
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/list.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/slab.h>
#include <linux/gpio/consumer.h>
#include <soc/fsl/qe/qe.h>
#include <asm/fsl_gtm.h>
#include "fhci.h"

void fhci_start_sof_timer(struct fhci_hcd *fhci)
{
	fhci_dbg(fhci, "-> %s\n", __func__);

	/* clear frame_n */
	out_be16(&fhci->pram->frame_num, 0);

	out_be16(&fhci->regs->usb_ussft, 0);
	setbits8(&fhci->regs->usb_usmod, USB_MODE_SFTE);

	fhci_dbg(fhci, "<- %s\n", __func__);
}

void fhci_stop_sof_timer(struct fhci_hcd *fhci)
{
	fhci_dbg(fhci, "-> %s\n", __func__);

	clrbits8(&fhci->regs->usb_usmod, USB_MODE_SFTE);
	gtm_stop_timer16(fhci->timer);

	fhci_dbg(fhci, "<- %s\n", __func__);
}

u16 fhci_get_sof_timer_count(struct fhci_usb *usb)
{
	return be16_to_cpu(in_be16(&usb->fhci->regs->usb_ussft) / 12);
}

/* initialize the endpoint zero */
static u32 endpoint_zero_init(struct fhci_usb *usb,
			      enum fhci_mem_alloc data_mem,
			      u32 ring_len)
{
	u32 rc;

	rc = fhci_create_ep(usb, data_mem, ring_len);
	if (rc)
		return rc;

	/* inilialize endpoint registers */
	fhci_init_ep_registers(usb, usb->ep0, data_mem);

	return 0;
}

/* enable the USB interrupts */
void fhci_usb_enable_interrupt(struct fhci_usb *usb)
{
	struct fhci_hcd *fhci = usb->fhci;

	if (usb->intr_nesting_cnt == 1) {
		/* initialize the USB interrupt */
		enable_irq(fhci_to_hcd(fhci)->irq);

		/* initialize the event register and mask register */
		out_be16(&usb->fhci->regs->usb_usber, 0xffff);
		out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk);

		/* enable the timer interrupts */
		enable_irq(fhci->timer->irq);
	} else if (usb->intr_nesting_cnt > 1)
		fhci_info(fhci, "unbalanced USB interrupts nesting\n");
	usb->intr_nesting_cnt--;
}

/* disable the usb interrupt */
void fhci_usb_disable_interrupt(struct fhci_usb *usb)
{
	struct fhci_hcd *fhci = usb->fhci;

	if (usb->intr_nesting_cnt == 0) {
		/* disable the timer interrupt */
		disable_irq_nosync(fhci->timer->irq);

		/* disable the usb interrupt */
		disable_irq_nosync(fhci_to_hcd(fhci)->irq);
		out_be16(&usb->fhci->regs->usb_usbmr, 0);
	}
	usb->intr_nesting_cnt++;
}

/* enable the USB controller */
static u32 fhci_usb_enable(struct fhci_hcd *fhci)
{
	struct fhci_usb *usb = fhci->usb_lld;

	out_be16(&usb->fhci->regs->usb_usber, 0xffff);
	out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk);
	setbits8(&usb->fhci->regs->usb_usmod, USB_MODE_EN);

	mdelay(100);

	return 0;
}

/* disable the USB controller */
static u32 fhci_usb_disable(struct fhci_hcd *fhci)
{
	struct fhci_usb *usb = fhci->usb_lld;

	fhci_usb_disable_interrupt(usb);
	fhci_port_disable(fhci);

	/* disable the usb controller */
	if (usb->port_status == FHCI_PORT_FULL ||
			usb->port_status == FHCI_PORT_LOW)
		fhci_device_disconnected_interrupt(fhci);

	clrbits8(&usb->fhci->regs->usb_usmod, USB_MODE_EN);

	return 0;
}

/* check the bus state by polling the QE bit on the IO ports */
int fhci_ioports_check_bus_state(struct fhci_hcd *fhci)
{
	u8 bits = 0;

	/* check USBOE,if transmitting,exit */
	if (!gpiod_get_value(fhci->gpiods[GPIO_USBOE]))
		return -1;

	/* check USBRP */
	if (gpiod_get_value(fhci->gpiods[GPIO_USBRP]))
		bits |= 0x2;

	/* check USBRN */
	if (gpiod_get_value(fhci->gpiods[GPIO_USBRN]))
		bits |= 0x1;

	return bits;
}

static void fhci_mem_free(struct fhci_hcd *fhci)
{
	struct ed *ed;
	struct ed *next_ed;
	struct td *td;
	struct td *next_td;

	list_for_each_entry_safe(ed, next_ed, &fhci->empty_eds, node) {
		list_del(&ed->node);
		kfree(ed);
	}

	list_for_each_entry_safe(td, next_td, &fhci->empty_tds, node) {
		list_del(&td->node);
		kfree(td);
	}

	kfree(fhci->vroot_hub);
	fhci->vroot_hub = NULL;

	kfree(fhci->hc_list);
	fhci->hc_list = NULL;
}

static int fhci_mem_init(struct fhci_hcd *fhci)
{
	int i;

	fhci->hc_list = kzalloc(sizeof(*fhci->hc_list), GFP_KERNEL);
	if (!fhci->hc_list)
		goto err;

	INIT_LIST_HEAD(&fhci->hc_list->ctrl_list);
	INIT_LIST_HEAD(&fhci->hc_list->bulk_list);
	INIT_LIST_HEAD(&fhci->hc_list->iso_list);
	INIT_LIST_HEAD(&fhci->hc_list->intr_list);
	INIT_LIST_HEAD(&fhci->hc_list->done_list);

	fhci->vroot_hub = kzalloc(sizeof(*fhci->vroot_hub), GFP_KERNEL);
	if (!fhci->vroot_hub)
		goto err;

	INIT_LIST_HEAD(&fhci->empty_eds);
	INIT_LIST_HEAD(&fhci->empty_tds);

	/* initialize work queue to handle done list */
	fhci_tasklet.data = (unsigned long)fhci;
	fhci->process_done_task = &fhci_tasklet;

	for (i = 0; i < MAX_TDS; i++) {
		struct td *td;

		td = kmalloc(sizeof(*td), GFP_KERNEL);
		if (!td)
			goto err;
		fhci_recycle_empty_td(fhci, td);
	}
	for (i = 0; i < MAX_EDS; i++) {
		struct ed *ed;

		ed = kmalloc(sizeof(*ed), GFP_KERNEL);
		if (!ed)
			goto err;
		fhci_recycle_empty_ed(fhci, ed);
	}

	fhci->active_urbs = 0;
	return 0;
err:
	fhci_mem_free(fhci);
	return -ENOMEM;
}

/* destroy the fhci_usb structure */
static void fhci_usb_free(void *lld)
{
	struct fhci_usb *usb = lld;
	struct fhci_hcd *fhci;

	if (usb) {
		fhci = usb->fhci;
		fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF);
		fhci_ep0_free(usb);
		kfree(usb->actual_frame);
		kfree(usb);
	}
}

/* initialize the USB */
static int fhci_usb_init(struct fhci_hcd *fhci)
{
	struct fhci_usb *usb = fhci->usb_lld;

	memset_io(usb->fhci->pram, 0, FHCI_PRAM_SIZE);

	usb->port_status = FHCI_PORT_DISABLED;
	usb->max_frame_usage = FRAME_TIME_USAGE;
	usb->sw_transaction_time = SW_FIX_TIME_BETWEEN_TRANSACTION;

	usb->actual_frame = kzalloc(sizeof(*usb->actual_frame), GFP_KERNEL);
	if (!usb->actual_frame) {
		fhci_usb_free(usb);
		return -ENOMEM;
	}

	INIT_LIST_HEAD(&usb->actual_frame->tds_list);

	/* initializing registers on chip, clear frame number */
	out_be16(&fhci->pram->frame_num, 0);

	/* clear rx state */
	out_be32(&fhci->pram->rx_state, 0);

	/* set mask register */
	usb->saved_msk = (USB_E_TXB_MASK |
			  USB_E_TXE1_MASK |
			  USB_E_IDLE_MASK |
			  USB_E_RESET_MASK | USB_E_SFT_MASK | USB_E_MSF_MASK);

	out_8(&usb->fhci->regs->usb_usmod, USB_MODE_HOST | USB_MODE_EN);

	/* clearing the mask register */
	out_be16(&usb->fhci->regs->usb_usbmr, 0);

	/* initialing the event register */
	out_be16(&usb->fhci->regs->usb_usber, 0xffff);

	if (endpoint_zero_init(usb, DEFAULT_DATA_MEM, DEFAULT_RING_LEN) != 0) {
		fhci_usb_free(usb);
		return -EINVAL;
	}

	return 0;
}

/* initialize the fhci_usb struct and the corresponding data staruct */
static struct fhci_usb *fhci_create_lld(struct fhci_hcd *fhci)
{
	struct fhci_usb *usb;

	/* allocate memory for SCC data structure */
	usb = kzalloc(sizeof(*usb), GFP_KERNEL);
	if (!usb)
		return NULL;

	usb->fhci = fhci;
	usb->hc_list = fhci->hc_list;
	usb->vroot_hub = fhci->vroot_hub;

	usb->transfer_confirm = fhci_transfer_confirm_callback;

	return usb;
}

static int fhci_start(struct usb_hcd *hcd)
{
	int ret;
	struct fhci_hcd *fhci = hcd_to_fhci(hcd);

	ret = fhci_mem_init(fhci);
	if (ret) {
		fhci_err(fhci, "failed to allocate memory\n");
		goto err;
	}

	fhci->usb_lld = fhci_create_lld(fhci);
	if (!fhci->usb_lld) {
		fhci_err(fhci, "low level driver config failed\n");
		ret = -ENOMEM;
		goto err;
	}

	ret = fhci_usb_init(fhci);
	if (ret) {
		fhci_err(fhci, "low level driver initialize failed\n");
		goto err;
	}

	spin_lock_init(&fhci->lock);

	/* connect the virtual root hub */
	fhci->vroot_hub->dev_num = 1;	/* this field may be needed to fix */
	fhci->vroot_hub->hub.wHubStatus = 0;
	fhci->vroot_hub->hub.wHubChange = 0;
	fhci->vroot_hub->port.wPortStatus = 0;
	fhci->vroot_hub->port.wPortChange = 0;

	hcd->state = HC_STATE_RUNNING;

	/*
	 * From here on, hub_wq concurrently accesses the root
	 * hub; drivers will be talking to enumerated devices.
	 * (On restart paths, hub_wq already knows about the root
	 * hub and could find work as soon as we wrote FLAG_CF.)
	 *
	 * Before this point the HC was idle/ready.  After, hub_wq
	 * and device drivers may start it running.
	 */
	fhci_usb_enable(fhci);
	return 0;
err:
	fhci_mem_free(fhci);
	return ret;
}

static void fhci_stop(struct usb_hcd *hcd)
{
	struct fhci_hcd *fhci = hcd_to_fhci(hcd);

	fhci_usb_disable_interrupt(fhci->usb_lld);
	fhci_usb_disable(fhci);

	fhci_usb_free(fhci->usb_lld);
	fhci->usb_lld = NULL;
	fhci_mem_free(fhci);
}

static int fhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
			    gfp_t mem_flags)
{
	struct fhci_hcd *fhci = hcd_to_fhci(hcd);
	u32 pipe = urb->pipe;
	int ret;
	int i;
	int size = 0;
	struct urb_priv *urb_priv;
	unsigned long flags;

	switch (usb_pipetype(pipe)) {
	case PIPE_CONTROL:
		/* 1 td fro setup,1 for ack */
		size = 2;
		fallthrough;
	case PIPE_BULK:
		/* one td for every 4096 bytes(can be up to 8k) */
		size += urb->transfer_buffer_length / 4096;
		/* ...add for any remaining bytes... */
		if ((urb->transfer_buffer_length % 4096) != 0)
			size++;
		/* ..and maybe a zero length packet to wrap it up */
		if (size == 0)
			size++;
		else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0
			 && (urb->transfer_buffer_length
			     % usb_maxpacket(urb->dev, pipe)) != 0)
			size++;
		break;
	case PIPE_ISOCHRONOUS:
		size = urb->number_of_packets;
		if (size <= 0)
			return -EINVAL;
		for (i = 0; i < urb->number_of_packets; i++) {
			urb->iso_frame_desc[i].actual_length = 0;
			urb->iso_frame_desc[i].status = (u32) (-EXDEV);
		}
		break;
	case PIPE_INTERRUPT:
		size = 1;
	}

	/* allocate the private part of the URB */
	urb_priv = kzalloc(sizeof(*urb_priv), mem_flags);
	if (!urb_priv)
		return -ENOMEM;

	/* allocate the private part of the URB */
	urb_priv->tds = kcalloc(size, sizeof(*urb_priv->tds), mem_flags);
	if (!urb_priv->tds) {
		kfree(urb_priv);
		return -ENOMEM;
	}

	spin_lock_irqsave(&fhci->lock, flags);

	ret = usb_hcd_link_urb_to_ep(hcd, urb);
	if (ret)
		goto err;

	/* fill the private part of the URB */
	urb_priv->num_of_tds = size;

	urb->status = -EINPROGRESS;
	urb->actual_length = 0;
	urb->error_count = 0;
	urb->hcpriv = urb_priv;

	fhci_queue_urb(fhci, urb);
err:
	if (ret) {
		kfree(urb_priv->tds);
		kfree(urb_priv);
	}
	spin_unlock_irqrestore(&fhci->lock, flags);
	return ret;
}

/* dequeue FHCI URB */
static int fhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
{
	struct fhci_hcd *fhci = hcd_to_fhci(hcd);
	struct fhci_usb *usb = fhci->usb_lld;
	int ret = -EINVAL;
	unsigned long flags;

	if (!urb || !urb->dev || !urb->dev->bus)
		goto out;

	spin_lock_irqsave(&fhci->lock, flags);

	ret = usb_hcd_check_unlink_urb(hcd, urb, status);
	if (ret)
		goto out2;

	if (usb->port_status != FHCI_PORT_DISABLED) {
		struct urb_priv *urb_priv;

		/*
		 * flag the urb's data for deletion in some upcoming
		 * SF interrupt's delete list processing
		 */
		urb_priv = urb->hcpriv;

		if (!urb_priv || (urb_priv->state == URB_DEL))
			goto out2;

		urb_priv->state = URB_DEL;

		/* already pending? */
		urb_priv->ed->state = FHCI_ED_URB_DEL;
	} else {
		fhci_urb_complete_free(fhci, urb);
	}

out2:
	spin_unlock_irqrestore(&fhci->lock, flags);
out:
	return ret;
}

static void fhci_endpoint_disable(struct usb_hcd *hcd,
				  struct usb_host_endpoint *ep)
{
	struct fhci_hcd *fhci;
	struct ed *ed;
	unsigned long flags;

	fhci = hcd_to_fhci(hcd);
	spin_lock_irqsave(&fhci->lock, flags);
	ed = ep->hcpriv;
	if (ed) {
		while (ed->td_head != NULL) {
			struct td *td = fhci_remove_td_from_ed(ed);
			fhci_urb_complete_free(fhci, td->urb);
		}
		fhci_recycle_empty_ed(fhci, ed);
		ep->hcpriv = NULL;
	}
	spin_unlock_irqrestore(&fhci->lock, flags);
}

static int fhci_get_frame_number(struct usb_hcd *hcd)
{
	struct fhci_hcd *fhci = hcd_to_fhci(hcd);

	return get_frame_num(fhci);
}

static const struct hc_driver fhci_driver = {
	.description = "fsl,usb-fhci",
	.product_desc = "FHCI HOST Controller",
	.hcd_priv_size = sizeof(struct fhci_hcd),

	/* generic hardware linkage */
	.irq = fhci_irq,
	.flags = HCD_DMA | HCD_USB11 | HCD_MEMORY,

	/* basic lifecycle operation */
	.start = fhci_start,
	.stop = fhci_stop,

	/* managing i/o requests and associated device resources */
	.urb_enqueue = fhci_urb_enqueue,
	.urb_dequeue = fhci_urb_dequeue,
	.endpoint_disable = fhci_endpoint_disable,

	/* scheduling support */
	.get_frame_number = fhci_get_frame_number,

	/* root hub support */
	.hub_status_data = fhci_hub_status_data,
	.hub_control = fhci_hub_control,
};

static int of_fhci_probe(struct platform_device *ofdev)
{
	struct device *dev = &ofdev->dev;
	struct device_node *node = dev->of_node;
	struct usb_hcd *hcd;
	struct fhci_hcd *fhci;
	struct resource usb_regs;
	unsigned long pram_addr;
	unsigned int usb_irq;
	const char *sprop;
	const u32 *iprop;
	int size;
	int ret;
	int i;
	int j;

	if (usb_disabled())
		return -ENODEV;

	sprop = of_get_property(node, "mode", NULL);
	if (sprop && strcmp(sprop, "host"))
		return -ENODEV;

	hcd = usb_create_hcd(&fhci_driver, dev, dev_name(dev));
	if (!hcd) {
		dev_err(dev, "could not create hcd\n");
		return -ENOMEM;
	}

	fhci = hcd_to_fhci(hcd);
	hcd->self.controller = dev;
	dev_set_drvdata(dev, hcd);

	iprop = of_get_property(node, "hub-power-budget", &size);
	if (iprop && size == sizeof(*iprop))
		hcd->power_budget = *iprop;

	/* FHCI registers. */
	ret = of_address_to_resource(node, 0, &usb_regs);
	if (ret) {
		dev_err(dev, "could not get regs\n");
		goto err_regs;
	}

	hcd->regs = ioremap(usb_regs.start, resource_size(&usb_regs));
	if (!hcd->regs) {
		dev_err(dev, "could not ioremap regs\n");
		ret = -ENOMEM;
		goto err_regs;
	}
	fhci->regs = hcd->regs;

	/* Parameter RAM. */
	iprop = of_get_property(node, "reg", &size);
	if (!iprop || size < sizeof(*iprop) * 4) {
		dev_err(dev, "can't get pram offset\n");
		ret = -EINVAL;
		goto err_pram;
	}

	pram_addr = cpm_muram_alloc(FHCI_PRAM_SIZE, 64);
	if (IS_ERR_VALUE(pram_addr)) {
		dev_err(dev, "failed to allocate usb pram\n");
		ret = -ENOMEM;
		goto err_pram;
	}

	qe_issue_cmd(QE_ASSIGN_PAGE_TO_DEVICE, QE_CR_SUBBLOCK_USB,
		     QE_CR_PROTOCOL_UNSPECIFIED, pram_addr);
	fhci->pram = cpm_muram_addr(pram_addr);

	/* GPIOs and pins */
	for (i = 0; i < NUM_GPIOS; i++) {
		if (i < GPIO_SPEED)
			fhci->gpiods[i] = devm_gpiod_get_index(dev,
					NULL, i, GPIOD_IN);

		else
			fhci->gpiods[i] = devm_gpiod_get_index_optional(dev,
					NULL, i, GPIOD_OUT_LOW);

		if (IS_ERR(fhci->gpiods[i])) {
			dev_err(dev, "incorrect GPIO%d: %ld\n",
				i, PTR_ERR(fhci->gpiods[i]));
			goto err_gpios;
		}
		if (!fhci->gpiods[i]) {
			dev_info(dev, "assuming board doesn't have "
				 "%s gpio\n", i == GPIO_SPEED ?
				 "speed" : "power");
		}
	}

	for (j = 0; j < NUM_PINS; j++) {
		fhci->pins[j] = qe_pin_request(dev, j);
		if (IS_ERR(fhci->pins[j])) {
			ret = PTR_ERR(fhci->pins[j]);
			dev_err(dev, "can't get pin %d: %d\n", j, ret);
			goto err_pins;
		}
	}

	/* Frame limit timer and its interrupt. */
	fhci->timer = gtm_get_timer16();
	if (IS_ERR(fhci->timer)) {
		ret = PTR_ERR(fhci->timer);
		dev_err(dev, "failed to request qe timer: %i", ret);
		goto err_get_timer;
	}

	ret = request_irq(fhci->timer->irq, fhci_frame_limit_timer_irq,
			  0, "qe timer (usb)", hcd);
	if (ret) {
		dev_err(dev, "failed to request timer irq");
		goto err_timer_irq;
	}

	/* USB Host interrupt. */
	usb_irq = irq_of_parse_and_map(node, 0);
	if (usb_irq == NO_IRQ) {
		dev_err(dev, "could not get usb irq\n");
		ret = -EINVAL;
		goto err_usb_irq;
	}

	/* Clocks. */
	sprop = of_get_property(node, "fsl,fullspeed-clock", NULL);
	if (sprop) {
		fhci->fullspeed_clk = qe_clock_source(sprop);
		if (fhci->fullspeed_clk == QE_CLK_DUMMY) {
			dev_err(dev, "wrong fullspeed-clock\n");
			ret = -EINVAL;
			goto err_clocks;
		}
	}

	sprop = of_get_property(node, "fsl,lowspeed-clock", NULL);
	if (sprop) {
		fhci->lowspeed_clk = qe_clock_source(sprop);
		if (fhci->lowspeed_clk == QE_CLK_DUMMY) {
			dev_err(dev, "wrong lowspeed-clock\n");
			ret = -EINVAL;
			goto err_clocks;
		}
	}

	if (fhci->fullspeed_clk == QE_CLK_NONE &&
			fhci->lowspeed_clk == QE_CLK_NONE) {
		dev_err(dev, "no clocks specified\n");
		ret = -EINVAL;
		goto err_clocks;
	}

	dev_info(dev, "at 0x%p, irq %d\n", hcd->regs, usb_irq);

	fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF);

	/* Start with full-speed, if possible. */
	if (fhci->fullspeed_clk != QE_CLK_NONE) {
		fhci_config_transceiver(fhci, FHCI_PORT_FULL);
		qe_usb_clock_set(fhci->fullspeed_clk, USB_CLOCK);
	} else {
		fhci_config_transceiver(fhci, FHCI_PORT_LOW);
		qe_usb_clock_set(fhci->lowspeed_clk, USB_CLOCK >> 3);
	}

	/* Clear and disable any pending interrupts. */
	out_be16(&fhci->regs->usb_usber, 0xffff);
	out_be16(&fhci->regs->usb_usbmr, 0);

	ret = usb_add_hcd(hcd, usb_irq, 0);
	if (ret < 0)
		goto err_add_hcd;

	device_wakeup_enable(hcd->self.controller);

	fhci_dfs_create(fhci);

	return 0;

err_add_hcd:
err_clocks:
	irq_dispose_mapping(usb_irq);
err_usb_irq:
	free_irq(fhci->timer->irq, hcd);
err_timer_irq:
	gtm_put_timer16(fhci->timer);
err_get_timer:
err_pins:
	while (--j >= 0)
		qe_pin_free(fhci->pins[j]);
err_gpios:
	cpm_muram_free(pram_addr);
err_pram:
	iounmap(hcd->regs);
err_regs:
	usb_put_hcd(hcd);
	return ret;
}

static int fhci_remove(struct device *dev)
{
	struct usb_hcd *hcd = dev_get_drvdata(dev);
	struct fhci_hcd *fhci = hcd_to_fhci(hcd);
	int j;

	usb_remove_hcd(hcd);
	free_irq(fhci->timer->irq, hcd);
	gtm_put_timer16(fhci->timer);
	cpm_muram_free(cpm_muram_offset(fhci->pram));
	for (j = 0; j < NUM_PINS; j++)
		qe_pin_free(fhci->pins[j]);
	fhci_dfs_destroy(fhci);
	usb_put_hcd(hcd);
	return 0;
}

static int of_fhci_remove(struct platform_device *ofdev)
{
	return fhci_remove(&ofdev->dev);
}

static const struct of_device_id of_fhci_match[] = {
	{ .compatible = "fsl,mpc8323-qe-usb", },
	{},
};
MODULE_DEVICE_TABLE(of, of_fhci_match);

static struct platform_driver of_fhci_driver = {
	.driver = {
		.name = "fsl,usb-fhci",
		.of_match_table = of_fhci_match,
	},
	.probe		= of_fhci_probe,
	.remove		= of_fhci_remove,
};

module_platform_driver(of_fhci_driver);

MODULE_DESCRIPTION("USB Freescale Host Controller Interface Driver");
MODULE_AUTHOR("Shlomi Gridish <gridish@freescale.com>, "
	      "Jerry Huang <Chang-Ming.Huang@freescale.com>, "
	      "Anton Vorontsov <avorontsov@ru.mvista.com>");
MODULE_LICENSE("GPL");