1/*
2 * Freescale QUICC Engine USB Host Controller Driver
3 *
4 * Copyright (c) Freescale Semicondutor, Inc. 2006.
5 *               Shlomi Gridish <gridish@freescale.com>
6 *               Jerry Huang <Chang-Ming.Huang@freescale.com>
7 * Copyright (c) Logic Product Development, Inc. 2007
8 *               Peter Barada <peterb@logicpd.com>
9 * Copyright (c) MontaVista Software, Inc. 2008.
10 *               Anton Vorontsov <avorontsov@ru.mvista.com>
11 *
12 * This program is free software; you can redistribute  it and/or modify it
13 * under  the terms of  the GNU General  Public License as published by the
14 * Free Software Foundation;  either version 2 of the  License, or (at your
15 * option) any later version.
16 */
17
18#include <linux/module.h>
19#include <linux/types.h>
20#include <linux/spinlock.h>
21#include <linux/kernel.h>
22#include <linux/delay.h>
23#include <linux/errno.h>
24#include <linux/list.h>
25#include <linux/interrupt.h>
26#include <linux/io.h>
27#include <linux/usb.h>
28#include <linux/usb/hcd.h>
29#include <linux/of_platform.h>
30#include <linux/of_gpio.h>
31#include <linux/slab.h>
32#include <asm/qe.h>
33#include <asm/fsl_gtm.h>
34#include "fhci.h"
35
36void fhci_start_sof_timer(struct fhci_hcd *fhci)
37{
38	fhci_dbg(fhci, "-> %s\n", __func__);
39
40	/* clear frame_n */
41	out_be16(&fhci->pram->frame_num, 0);
42
43	out_be16(&fhci->regs->usb_sof_tmr, 0);
44	setbits8(&fhci->regs->usb_mod, USB_MODE_SFTE);
45
46	fhci_dbg(fhci, "<- %s\n", __func__);
47}
48
49void fhci_stop_sof_timer(struct fhci_hcd *fhci)
50{
51	fhci_dbg(fhci, "-> %s\n", __func__);
52
53	clrbits8(&fhci->regs->usb_mod, USB_MODE_SFTE);
54	gtm_stop_timer16(fhci->timer);
55
56	fhci_dbg(fhci, "<- %s\n", __func__);
57}
58
59u16 fhci_get_sof_timer_count(struct fhci_usb *usb)
60{
61	return be16_to_cpu(in_be16(&usb->fhci->regs->usb_sof_tmr) / 12);
62}
63
64/* initialize the endpoint zero */
65static u32 endpoint_zero_init(struct fhci_usb *usb,
66			      enum fhci_mem_alloc data_mem,
67			      u32 ring_len)
68{
69	u32 rc;
70
71	rc = fhci_create_ep(usb, data_mem, ring_len);
72	if (rc)
73		return rc;
74
75	/* inilialize endpoint registers */
76	fhci_init_ep_registers(usb, usb->ep0, data_mem);
77
78	return 0;
79}
80
81/* enable the USB interrupts */
82void fhci_usb_enable_interrupt(struct fhci_usb *usb)
83{
84	struct fhci_hcd *fhci = usb->fhci;
85
86	if (usb->intr_nesting_cnt == 1) {
87		/* initialize the USB interrupt */
88		enable_irq(fhci_to_hcd(fhci)->irq);
89
90		/* initialize the event register and mask register */
91		out_be16(&usb->fhci->regs->usb_event, 0xffff);
92		out_be16(&usb->fhci->regs->usb_mask, usb->saved_msk);
93
94		/* enable the timer interrupts */
95		enable_irq(fhci->timer->irq);
96	} else if (usb->intr_nesting_cnt > 1)
97		fhci_info(fhci, "unbalanced USB interrupts nesting\n");
98	usb->intr_nesting_cnt--;
99}
100
101/* disable the usb interrupt */
102void fhci_usb_disable_interrupt(struct fhci_usb *usb)
103{
104	struct fhci_hcd *fhci = usb->fhci;
105
106	if (usb->intr_nesting_cnt == 0) {
107		/* disable the timer interrupt */
108		disable_irq_nosync(fhci->timer->irq);
109
110		/* disable the usb interrupt */
111		disable_irq_nosync(fhci_to_hcd(fhci)->irq);
112		out_be16(&usb->fhci->regs->usb_mask, 0);
113	}
114	usb->intr_nesting_cnt++;
115}
116
117/* enable the USB controller */
118static u32 fhci_usb_enable(struct fhci_hcd *fhci)
119{
120	struct fhci_usb *usb = fhci->usb_lld;
121
122	out_be16(&usb->fhci->regs->usb_event, 0xffff);
123	out_be16(&usb->fhci->regs->usb_mask, usb->saved_msk);
124	setbits8(&usb->fhci->regs->usb_mod, USB_MODE_EN);
125
126	mdelay(100);
127
128	return 0;
129}
130
131/* disable the USB controller */
132static u32 fhci_usb_disable(struct fhci_hcd *fhci)
133{
134	struct fhci_usb *usb = fhci->usb_lld;
135
136	fhci_usb_disable_interrupt(usb);
137	fhci_port_disable(fhci);
138
139	/* disable the usb controller */
140	if (usb->port_status == FHCI_PORT_FULL ||
141			usb->port_status == FHCI_PORT_LOW)
142		fhci_device_disconnected_interrupt(fhci);
143
144	clrbits8(&usb->fhci->regs->usb_mod, USB_MODE_EN);
145
146	return 0;
147}
148
149/* check the bus state by polling the QE bit on the IO ports */
150int fhci_ioports_check_bus_state(struct fhci_hcd *fhci)
151{
152	u8 bits = 0;
153
154	/* check USBOE,if transmitting,exit */
155	if (!gpio_get_value(fhci->gpios[GPIO_USBOE]))
156		return -1;
157
158	/* check USBRP */
159	if (gpio_get_value(fhci->gpios[GPIO_USBRP]))
160		bits |= 0x2;
161
162	/* check USBRN */
163	if (gpio_get_value(fhci->gpios[GPIO_USBRN]))
164		bits |= 0x1;
165
166	return bits;
167}
168
169static void fhci_mem_free(struct fhci_hcd *fhci)
170{
171	struct ed *ed;
172	struct ed *next_ed;
173	struct td *td;
174	struct td *next_td;
175
176	list_for_each_entry_safe(ed, next_ed, &fhci->empty_eds, node) {
177		list_del(&ed->node);
178		kfree(ed);
179	}
180
181	list_for_each_entry_safe(td, next_td, &fhci->empty_tds, node) {
182		list_del(&td->node);
183		kfree(td);
184	}
185
186	kfree(fhci->vroot_hub);
187	fhci->vroot_hub = NULL;
188
189	kfree(fhci->hc_list);
190	fhci->hc_list = NULL;
191}
192
193static int fhci_mem_init(struct fhci_hcd *fhci)
194{
195	int i;
196
197	fhci->hc_list = kzalloc(sizeof(*fhci->hc_list), GFP_KERNEL);
198	if (!fhci->hc_list)
199		goto err;
200
201	INIT_LIST_HEAD(&fhci->hc_list->ctrl_list);
202	INIT_LIST_HEAD(&fhci->hc_list->bulk_list);
203	INIT_LIST_HEAD(&fhci->hc_list->iso_list);
204	INIT_LIST_HEAD(&fhci->hc_list->intr_list);
205	INIT_LIST_HEAD(&fhci->hc_list->done_list);
206
207	fhci->vroot_hub = kzalloc(sizeof(*fhci->vroot_hub), GFP_KERNEL);
208	if (!fhci->vroot_hub)
209		goto err;
210
211	INIT_LIST_HEAD(&fhci->empty_eds);
212	INIT_LIST_HEAD(&fhci->empty_tds);
213
214	/* initialize work queue to handle done list */
215	fhci_tasklet.data = (unsigned long)fhci;
216	fhci->process_done_task = &fhci_tasklet;
217
218	for (i = 0; i < MAX_TDS; i++) {
219		struct td *td;
220
221		td = kmalloc(sizeof(*td), GFP_KERNEL);
222		if (!td)
223			goto err;
224		fhci_recycle_empty_td(fhci, td);
225	}
226	for (i = 0; i < MAX_EDS; i++) {
227		struct ed *ed;
228
229		ed = kmalloc(sizeof(*ed), GFP_KERNEL);
230		if (!ed)
231			goto err;
232		fhci_recycle_empty_ed(fhci, ed);
233	}
234
235	fhci->active_urbs = 0;
236	return 0;
237err:
238	fhci_mem_free(fhci);
239	return -ENOMEM;
240}
241
242/* destroy the fhci_usb structure */
243static void fhci_usb_free(void *lld)
244{
245	struct fhci_usb *usb = lld;
246	struct fhci_hcd *fhci;
247
248	if (usb) {
249		fhci = usb->fhci;
250		fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF);
251		fhci_ep0_free(usb);
252		kfree(usb->actual_frame);
253		kfree(usb);
254	}
255}
256
257/* initialize the USB */
258static int fhci_usb_init(struct fhci_hcd *fhci)
259{
260	struct fhci_usb *usb = fhci->usb_lld;
261
262	memset_io(usb->fhci->pram, 0, FHCI_PRAM_SIZE);
263
264	usb->port_status = FHCI_PORT_DISABLED;
265	usb->max_frame_usage = FRAME_TIME_USAGE;
266	usb->sw_transaction_time = SW_FIX_TIME_BETWEEN_TRANSACTION;
267
268	usb->actual_frame = kzalloc(sizeof(*usb->actual_frame), GFP_KERNEL);
269	if (!usb->actual_frame) {
270		fhci_usb_free(usb);
271		return -ENOMEM;
272	}
273
274	INIT_LIST_HEAD(&usb->actual_frame->tds_list);
275
276	/* initializing registers on chip, clear frame number */
277	out_be16(&fhci->pram->frame_num, 0);
278
279	/* clear rx state */
280	out_be32(&fhci->pram->rx_state, 0);
281
282	/* set mask register */
283	usb->saved_msk = (USB_E_TXB_MASK |
284			  USB_E_TXE1_MASK |
285			  USB_E_IDLE_MASK |
286			  USB_E_RESET_MASK | USB_E_SFT_MASK | USB_E_MSF_MASK);
287
288	out_8(&usb->fhci->regs->usb_mod, USB_MODE_HOST | USB_MODE_EN);
289
290	/* clearing the mask register */
291	out_be16(&usb->fhci->regs->usb_mask, 0);
292
293	/* initialing the event register */
294	out_be16(&usb->fhci->regs->usb_event, 0xffff);
295
296	if (endpoint_zero_init(usb, DEFAULT_DATA_MEM, DEFAULT_RING_LEN) != 0) {
297		fhci_usb_free(usb);
298		return -EINVAL;
299	}
300
301	return 0;
302}
303
304/* initialize the fhci_usb struct and the corresponding data staruct */
305static struct fhci_usb *fhci_create_lld(struct fhci_hcd *fhci)
306{
307	struct fhci_usb *usb;
308
309	/* allocate memory for SCC data structure */
310	usb = kzalloc(sizeof(*usb), GFP_KERNEL);
311	if (!usb) {
312		fhci_err(fhci, "no memory for SCC data struct\n");
313		return NULL;
314	}
315
316	usb->fhci = fhci;
317	usb->hc_list = fhci->hc_list;
318	usb->vroot_hub = fhci->vroot_hub;
319
320	usb->transfer_confirm = fhci_transfer_confirm_callback;
321
322	return usb;
323}
324
325static int fhci_start(struct usb_hcd *hcd)
326{
327	int ret;
328	struct fhci_hcd *fhci = hcd_to_fhci(hcd);
329
330	ret = fhci_mem_init(fhci);
331	if (ret) {
332		fhci_err(fhci, "failed to allocate memory\n");
333		goto err;
334	}
335
336	fhci->usb_lld = fhci_create_lld(fhci);
337	if (!fhci->usb_lld) {
338		fhci_err(fhci, "low level driver config failed\n");
339		ret = -ENOMEM;
340		goto err;
341	}
342
343	ret = fhci_usb_init(fhci);
344	if (ret) {
345		fhci_err(fhci, "low level driver initialize failed\n");
346		goto err;
347	}
348
349	spin_lock_init(&fhci->lock);
350
351	/* connect the virtual root hub */
352	fhci->vroot_hub->dev_num = 1;	/* this field may be needed to fix */
353	fhci->vroot_hub->hub.wHubStatus = 0;
354	fhci->vroot_hub->hub.wHubChange = 0;
355	fhci->vroot_hub->port.wPortStatus = 0;
356	fhci->vroot_hub->port.wPortChange = 0;
357
358	hcd->state = HC_STATE_RUNNING;
359
360	/*
361	 * From here on, khubd concurrently accesses the root
362	 * hub; drivers will be talking to enumerated devices.
363	 * (On restart paths, khubd already knows about the root
364	 * hub and could find work as soon as we wrote FLAG_CF.)
365	 *
366	 * Before this point the HC was idle/ready.  After, khubd
367	 * and device drivers may start it running.
368	 */
369	fhci_usb_enable(fhci);
370	return 0;
371err:
372	fhci_mem_free(fhci);
373	return ret;
374}
375
376static void fhci_stop(struct usb_hcd *hcd)
377{
378	struct fhci_hcd *fhci = hcd_to_fhci(hcd);
379
380	fhci_usb_disable_interrupt(fhci->usb_lld);
381	fhci_usb_disable(fhci);
382
383	fhci_usb_free(fhci->usb_lld);
384	fhci->usb_lld = NULL;
385	fhci_mem_free(fhci);
386}
387
388static int fhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
389			    gfp_t mem_flags)
390{
391	struct fhci_hcd *fhci = hcd_to_fhci(hcd);
392	u32 pipe = urb->pipe;
393	int ret;
394	int i;
395	int size = 0;
396	struct urb_priv *urb_priv;
397	unsigned long flags;
398
399	switch (usb_pipetype(pipe)) {
400	case PIPE_CONTROL:
401		/* 1 td fro setup,1 for ack */
402		size = 2;
403	case PIPE_BULK:
404		/* one td for every 4096 bytes(can be up to 8k) */
405		size += urb->transfer_buffer_length / 4096;
406		/* ...add for any remaining bytes... */
407		if ((urb->transfer_buffer_length % 4096) != 0)
408			size++;
409		/* ..and maybe a zero length packet to wrap it up */
410		if (size == 0)
411			size++;
412		else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0
413			 && (urb->transfer_buffer_length
414			     % usb_maxpacket(urb->dev, pipe,
415					     usb_pipeout(pipe))) != 0)
416			size++;
417		break;
418	case PIPE_ISOCHRONOUS:
419		size = urb->number_of_packets;
420		if (size <= 0)
421			return -EINVAL;
422		for (i = 0; i < urb->number_of_packets; i++) {
423			urb->iso_frame_desc[i].actual_length = 0;
424			urb->iso_frame_desc[i].status = (u32) (-EXDEV);
425		}
426		break;
427	case PIPE_INTERRUPT:
428		size = 1;
429	}
430
431	/* allocate the private part of the URB */
432	urb_priv = kzalloc(sizeof(*urb_priv), mem_flags);
433	if (!urb_priv)
434		return -ENOMEM;
435
436	/* allocate the private part of the URB */
437	urb_priv->tds = kcalloc(size, sizeof(*urb_priv->tds), mem_flags);
438	if (!urb_priv->tds) {
439		kfree(urb_priv);
440		return -ENOMEM;
441	}
442
443	spin_lock_irqsave(&fhci->lock, flags);
444
445	ret = usb_hcd_link_urb_to_ep(hcd, urb);
446	if (ret)
447		goto err;
448
449	/* fill the private part of the URB */
450	urb_priv->num_of_tds = size;
451
452	urb->status = -EINPROGRESS;
453	urb->actual_length = 0;
454	urb->error_count = 0;
455	urb->hcpriv = urb_priv;
456
457	fhci_queue_urb(fhci, urb);
458err:
459	if (ret) {
460		kfree(urb_priv->tds);
461		kfree(urb_priv);
462	}
463	spin_unlock_irqrestore(&fhci->lock, flags);
464	return ret;
465}
466
467/* dequeue FHCI URB */
468static int fhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
469{
470	struct fhci_hcd *fhci = hcd_to_fhci(hcd);
471	struct fhci_usb *usb = fhci->usb_lld;
472	int ret = -EINVAL;
473	unsigned long flags;
474
475	if (!urb || !urb->dev || !urb->dev->bus)
476		goto out;
477
478	spin_lock_irqsave(&fhci->lock, flags);
479
480	ret = usb_hcd_check_unlink_urb(hcd, urb, status);
481	if (ret)
482		goto out2;
483
484	if (usb->port_status != FHCI_PORT_DISABLED) {
485		struct urb_priv *urb_priv;
486
487		/*
488		 * flag the urb's data for deletion in some upcoming
489		 * SF interrupt's delete list processing
490		 */
491		urb_priv = urb->hcpriv;
492
493		if (!urb_priv || (urb_priv->state == URB_DEL))
494			goto out2;
495
496		urb_priv->state = URB_DEL;
497
498		/* already pending? */
499		urb_priv->ed->state = FHCI_ED_URB_DEL;
500	} else {
501		fhci_urb_complete_free(fhci, urb);
502	}
503
504out2:
505	spin_unlock_irqrestore(&fhci->lock, flags);
506out:
507	return ret;
508}
509
510static void fhci_endpoint_disable(struct usb_hcd *hcd,
511				  struct usb_host_endpoint *ep)
512{
513	struct fhci_hcd *fhci;
514	struct ed *ed;
515	unsigned long flags;
516
517	fhci = hcd_to_fhci(hcd);
518	spin_lock_irqsave(&fhci->lock, flags);
519	ed = ep->hcpriv;
520	if (ed) {
521		while (ed->td_head != NULL) {
522			struct td *td = fhci_remove_td_from_ed(ed);
523			fhci_urb_complete_free(fhci, td->urb);
524		}
525		fhci_recycle_empty_ed(fhci, ed);
526		ep->hcpriv = NULL;
527	}
528	spin_unlock_irqrestore(&fhci->lock, flags);
529}
530
531static int fhci_get_frame_number(struct usb_hcd *hcd)
532{
533	struct fhci_hcd *fhci = hcd_to_fhci(hcd);
534
535	return get_frame_num(fhci);
536}
537
538static const struct hc_driver fhci_driver = {
539	.description = "fsl,usb-fhci",
540	.product_desc = "FHCI HOST Controller",
541	.hcd_priv_size = sizeof(struct fhci_hcd),
542
543	/* generic hardware linkage */
544	.irq = fhci_irq,
545	.flags = HCD_USB11 | HCD_MEMORY,
546
547	/* basic lifecycle operation */
548	.start = fhci_start,
549	.stop = fhci_stop,
550
551	/* managing i/o requests and associated device resources */
552	.urb_enqueue = fhci_urb_enqueue,
553	.urb_dequeue = fhci_urb_dequeue,
554	.endpoint_disable = fhci_endpoint_disable,
555
556	/* scheduling support */
557	.get_frame_number = fhci_get_frame_number,
558
559	/* root hub support */
560	.hub_status_data = fhci_hub_status_data,
561	.hub_control = fhci_hub_control,
562};
563
564static int __devinit of_fhci_probe(struct platform_device *ofdev)
565{
566	struct device *dev = &ofdev->dev;
567	struct device_node *node = dev->of_node;
568	struct usb_hcd *hcd;
569	struct fhci_hcd *fhci;
570	struct resource usb_regs;
571	unsigned long pram_addr;
572	unsigned int usb_irq;
573	const char *sprop;
574	const u32 *iprop;
575	int size;
576	int ret;
577	int i;
578	int j;
579
580	if (usb_disabled())
581		return -ENODEV;
582
583	sprop = of_get_property(node, "mode", NULL);
584	if (sprop && strcmp(sprop, "host"))
585		return -ENODEV;
586
587	hcd = usb_create_hcd(&fhci_driver, dev, dev_name(dev));
588	if (!hcd) {
589		dev_err(dev, "could not create hcd\n");
590		return -ENOMEM;
591	}
592
593	fhci = hcd_to_fhci(hcd);
594	hcd->self.controller = dev;
595	dev_set_drvdata(dev, hcd);
596
597	iprop = of_get_property(node, "hub-power-budget", &size);
598	if (iprop && size == sizeof(*iprop))
599		hcd->power_budget = *iprop;
600
601	/* FHCI registers. */
602	ret = of_address_to_resource(node, 0, &usb_regs);
603	if (ret) {
604		dev_err(dev, "could not get regs\n");
605		goto err_regs;
606	}
607
608	hcd->regs = ioremap(usb_regs.start, resource_size(&usb_regs));
609	if (!hcd->regs) {
610		dev_err(dev, "could not ioremap regs\n");
611		ret = -ENOMEM;
612		goto err_regs;
613	}
614	fhci->regs = hcd->regs;
615
616	/* Parameter RAM. */
617	iprop = of_get_property(node, "reg", &size);
618	if (!iprop || size < sizeof(*iprop) * 4) {
619		dev_err(dev, "can't get pram offset\n");
620		ret = -EINVAL;
621		goto err_pram;
622	}
623
624	pram_addr = cpm_muram_alloc(FHCI_PRAM_SIZE, 64);
625	if (IS_ERR_VALUE(pram_addr)) {
626		dev_err(dev, "failed to allocate usb pram\n");
627		ret = -ENOMEM;
628		goto err_pram;
629	}
630
631	qe_issue_cmd(QE_ASSIGN_PAGE_TO_DEVICE, QE_CR_SUBBLOCK_USB,
632		     QE_CR_PROTOCOL_UNSPECIFIED, pram_addr);
633	fhci->pram = cpm_muram_addr(pram_addr);
634
635	/* GPIOs and pins */
636	for (i = 0; i < NUM_GPIOS; i++) {
637		int gpio;
638		enum of_gpio_flags flags;
639
640		gpio = of_get_gpio_flags(node, i, &flags);
641		fhci->gpios[i] = gpio;
642		fhci->alow_gpios[i] = flags & OF_GPIO_ACTIVE_LOW;
643
644		if (!gpio_is_valid(gpio)) {
645			if (i < GPIO_SPEED) {
646				dev_err(dev, "incorrect GPIO%d: %d\n",
647					i, gpio);
648				goto err_gpios;
649			} else {
650				dev_info(dev, "assuming board doesn't have "
651					"%s gpio\n", i == GPIO_SPEED ?
652					"speed" : "power");
653				continue;
654			}
655		}
656
657		ret = gpio_request(gpio, dev_name(dev));
658		if (ret) {
659			dev_err(dev, "failed to request gpio %d", i);
660			goto err_gpios;
661		}
662
663		if (i >= GPIO_SPEED) {
664			ret = gpio_direction_output(gpio, 0);
665			if (ret) {
666				dev_err(dev, "failed to set gpio %d as "
667					"an output\n", i);
668				i++;
669				goto err_gpios;
670			}
671		}
672	}
673
674	for (j = 0; j < NUM_PINS; j++) {
675		fhci->pins[j] = qe_pin_request(node, j);
676		if (IS_ERR(fhci->pins[j])) {
677			ret = PTR_ERR(fhci->pins[j]);
678			dev_err(dev, "can't get pin %d: %d\n", j, ret);
679			goto err_pins;
680		}
681	}
682
683	/* Frame limit timer and its interrupt. */
684	fhci->timer = gtm_get_timer16();
685	if (IS_ERR(fhci->timer)) {
686		ret = PTR_ERR(fhci->timer);
687		dev_err(dev, "failed to request qe timer: %i", ret);
688		goto err_get_timer;
689	}
690
691	ret = request_irq(fhci->timer->irq, fhci_frame_limit_timer_irq,
692			  0, "qe timer (usb)", hcd);
693	if (ret) {
694		dev_err(dev, "failed to request timer irq");
695		goto err_timer_irq;
696	}
697
698	/* USB Host interrupt. */
699	usb_irq = irq_of_parse_and_map(node, 0);
700	if (usb_irq == NO_IRQ) {
701		dev_err(dev, "could not get usb irq\n");
702		ret = -EINVAL;
703		goto err_usb_irq;
704	}
705
706	/* Clocks. */
707	sprop = of_get_property(node, "fsl,fullspeed-clock", NULL);
708	if (sprop) {
709		fhci->fullspeed_clk = qe_clock_source(sprop);
710		if (fhci->fullspeed_clk == QE_CLK_DUMMY) {
711			dev_err(dev, "wrong fullspeed-clock\n");
712			ret = -EINVAL;
713			goto err_clocks;
714		}
715	}
716
717	sprop = of_get_property(node, "fsl,lowspeed-clock", NULL);
718	if (sprop) {
719		fhci->lowspeed_clk = qe_clock_source(sprop);
720		if (fhci->lowspeed_clk == QE_CLK_DUMMY) {
721			dev_err(dev, "wrong lowspeed-clock\n");
722			ret = -EINVAL;
723			goto err_clocks;
724		}
725	}
726
727	if (fhci->fullspeed_clk == QE_CLK_NONE &&
728			fhci->lowspeed_clk == QE_CLK_NONE) {
729		dev_err(dev, "no clocks specified\n");
730		ret = -EINVAL;
731		goto err_clocks;
732	}
733
734	dev_info(dev, "at 0x%p, irq %d\n", hcd->regs, usb_irq);
735
736	fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF);
737
738	/* Start with full-speed, if possible. */
739	if (fhci->fullspeed_clk != QE_CLK_NONE) {
740		fhci_config_transceiver(fhci, FHCI_PORT_FULL);
741		qe_usb_clock_set(fhci->fullspeed_clk, USB_CLOCK);
742	} else {
743		fhci_config_transceiver(fhci, FHCI_PORT_LOW);
744		qe_usb_clock_set(fhci->lowspeed_clk, USB_CLOCK >> 3);
745	}
746
747	/* Clear and disable any pending interrupts. */
748	out_be16(&fhci->regs->usb_event, 0xffff);
749	out_be16(&fhci->regs->usb_mask, 0);
750
751	ret = usb_add_hcd(hcd, usb_irq, 0);
752	if (ret < 0)
753		goto err_add_hcd;
754
755	fhci_dfs_create(fhci);
756
757	return 0;
758
759err_add_hcd:
760err_clocks:
761	irq_dispose_mapping(usb_irq);
762err_usb_irq:
763	free_irq(fhci->timer->irq, hcd);
764err_timer_irq:
765	gtm_put_timer16(fhci->timer);
766err_get_timer:
767err_pins:
768	while (--j >= 0)
769		qe_pin_free(fhci->pins[j]);
770err_gpios:
771	while (--i >= 0) {
772		if (gpio_is_valid(fhci->gpios[i]))
773			gpio_free(fhci->gpios[i]);
774	}
775	cpm_muram_free(pram_addr);
776err_pram:
777	iounmap(hcd->regs);
778err_regs:
779	usb_put_hcd(hcd);
780	return ret;
781}
782
783static int __devexit fhci_remove(struct device *dev)
784{
785	struct usb_hcd *hcd = dev_get_drvdata(dev);
786	struct fhci_hcd *fhci = hcd_to_fhci(hcd);
787	int i;
788	int j;
789
790	usb_remove_hcd(hcd);
791	free_irq(fhci->timer->irq, hcd);
792	gtm_put_timer16(fhci->timer);
793	cpm_muram_free(cpm_muram_offset(fhci->pram));
794	for (i = 0; i < NUM_GPIOS; i++) {
795		if (!gpio_is_valid(fhci->gpios[i]))
796			continue;
797		gpio_free(fhci->gpios[i]);
798	}
799	for (j = 0; j < NUM_PINS; j++)
800		qe_pin_free(fhci->pins[j]);
801	fhci_dfs_destroy(fhci);
802	usb_put_hcd(hcd);
803	return 0;
804}
805
806static int __devexit of_fhci_remove(struct platform_device *ofdev)
807{
808	return fhci_remove(&ofdev->dev);
809}
810
811static const struct of_device_id of_fhci_match[] = {
812	{ .compatible = "fsl,mpc8323-qe-usb", },
813	{},
814};
815MODULE_DEVICE_TABLE(of, of_fhci_match);
816
817static struct platform_driver of_fhci_driver = {
818	.driver = {
819		.name = "fsl,usb-fhci",
820		.owner = THIS_MODULE,
821		.of_match_table = of_fhci_match,
822	},
823	.probe		= of_fhci_probe,
824	.remove		= __devexit_p(of_fhci_remove),
825};
826
827module_platform_driver(of_fhci_driver);
828
829MODULE_DESCRIPTION("USB Freescale Host Controller Interface Driver");
830MODULE_AUTHOR("Shlomi Gridish <gridish@freescale.com>, "
831	      "Jerry Huang <Chang-Ming.Huang@freescale.com>, "
832	      "Anton Vorontsov <avorontsov@ru.mvista.com>");
833MODULE_LICENSE("GPL");
834