1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Freescale QUICC Engine USB Host Controller Driver
4 *
5 * Copyright (c) Freescale Semicondutor, Inc. 2006.
6 * Shlomi Gridish <gridish@freescale.com>
7 * Jerry Huang <Chang-Ming.Huang@freescale.com>
8 * Copyright (c) Logic Product Development, Inc. 2007
9 * Peter Barada <peterb@logicpd.com>
10 * Copyright (c) MontaVista Software, Inc. 2008.
11 * Anton Vorontsov <avorontsov@ru.mvista.com>
12 */
13
14 #include <linux/module.h>
15 #include <linux/types.h>
16 #include <linux/spinlock.h>
17 #include <linux/kernel.h>
18 #include <linux/delay.h>
19 #include <linux/errno.h>
20 #include <linux/list.h>
21 #include <linux/interrupt.h>
22 #include <linux/io.h>
23 #include <linux/usb.h>
24 #include <linux/usb/hcd.h>
25 #include <linux/of_address.h>
26 #include <linux/of_irq.h>
27 #include <linux/of_platform.h>
28 #include <linux/slab.h>
29 #include <linux/gpio/consumer.h>
30 #include <soc/fsl/qe/qe.h>
31 #include <asm/fsl_gtm.h>
32 #include "fhci.h"
33
fhci_start_sof_timer(struct fhci_hcd * fhci)34 void fhci_start_sof_timer(struct fhci_hcd *fhci)
35 {
36 fhci_dbg(fhci, "-> %s\n", __func__);
37
38 /* clear frame_n */
39 out_be16(&fhci->pram->frame_num, 0);
40
41 out_be16(&fhci->regs->usb_ussft, 0);
42 setbits8(&fhci->regs->usb_usmod, USB_MODE_SFTE);
43
44 fhci_dbg(fhci, "<- %s\n", __func__);
45 }
46
fhci_stop_sof_timer(struct fhci_hcd * fhci)47 void fhci_stop_sof_timer(struct fhci_hcd *fhci)
48 {
49 fhci_dbg(fhci, "-> %s\n", __func__);
50
51 clrbits8(&fhci->regs->usb_usmod, USB_MODE_SFTE);
52 gtm_stop_timer16(fhci->timer);
53
54 fhci_dbg(fhci, "<- %s\n", __func__);
55 }
56
fhci_get_sof_timer_count(struct fhci_usb * usb)57 u16 fhci_get_sof_timer_count(struct fhci_usb *usb)
58 {
59 return be16_to_cpu(in_be16(&usb->fhci->regs->usb_ussft) / 12);
60 }
61
62 /* initialize the endpoint zero */
endpoint_zero_init(struct fhci_usb * usb,enum fhci_mem_alloc data_mem,u32 ring_len)63 static u32 endpoint_zero_init(struct fhci_usb *usb,
64 enum fhci_mem_alloc data_mem,
65 u32 ring_len)
66 {
67 u32 rc;
68
69 rc = fhci_create_ep(usb, data_mem, ring_len);
70 if (rc)
71 return rc;
72
73 /* inilialize endpoint registers */
74 fhci_init_ep_registers(usb, usb->ep0, data_mem);
75
76 return 0;
77 }
78
79 /* enable the USB interrupts */
fhci_usb_enable_interrupt(struct fhci_usb * usb)80 void fhci_usb_enable_interrupt(struct fhci_usb *usb)
81 {
82 struct fhci_hcd *fhci = usb->fhci;
83
84 if (usb->intr_nesting_cnt == 1) {
85 /* initialize the USB interrupt */
86 enable_irq(fhci_to_hcd(fhci)->irq);
87
88 /* initialize the event register and mask register */
89 out_be16(&usb->fhci->regs->usb_usber, 0xffff);
90 out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk);
91
92 /* enable the timer interrupts */
93 enable_irq(fhci->timer->irq);
94 } else if (usb->intr_nesting_cnt > 1)
95 fhci_info(fhci, "unbalanced USB interrupts nesting\n");
96 usb->intr_nesting_cnt--;
97 }
98
99 /* disable the usb interrupt */
fhci_usb_disable_interrupt(struct fhci_usb * usb)100 void fhci_usb_disable_interrupt(struct fhci_usb *usb)
101 {
102 struct fhci_hcd *fhci = usb->fhci;
103
104 if (usb->intr_nesting_cnt == 0) {
105 /* disable the timer interrupt */
106 disable_irq_nosync(fhci->timer->irq);
107
108 /* disable the usb interrupt */
109 disable_irq_nosync(fhci_to_hcd(fhci)->irq);
110 out_be16(&usb->fhci->regs->usb_usbmr, 0);
111 }
112 usb->intr_nesting_cnt++;
113 }
114
115 /* enable the USB controller */
fhci_usb_enable(struct fhci_hcd * fhci)116 static u32 fhci_usb_enable(struct fhci_hcd *fhci)
117 {
118 struct fhci_usb *usb = fhci->usb_lld;
119
120 out_be16(&usb->fhci->regs->usb_usber, 0xffff);
121 out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk);
122 setbits8(&usb->fhci->regs->usb_usmod, USB_MODE_EN);
123
124 mdelay(100);
125
126 return 0;
127 }
128
129 /* disable the USB controller */
fhci_usb_disable(struct fhci_hcd * fhci)130 static u32 fhci_usb_disable(struct fhci_hcd *fhci)
131 {
132 struct fhci_usb *usb = fhci->usb_lld;
133
134 fhci_usb_disable_interrupt(usb);
135 fhci_port_disable(fhci);
136
137 /* disable the usb controller */
138 if (usb->port_status == FHCI_PORT_FULL ||
139 usb->port_status == FHCI_PORT_LOW)
140 fhci_device_disconnected_interrupt(fhci);
141
142 clrbits8(&usb->fhci->regs->usb_usmod, USB_MODE_EN);
143
144 return 0;
145 }
146
147 /* check the bus state by polling the QE bit on the IO ports */
fhci_ioports_check_bus_state(struct fhci_hcd * fhci)148 int fhci_ioports_check_bus_state(struct fhci_hcd *fhci)
149 {
150 u8 bits = 0;
151
152 /* check USBOE,if transmitting,exit */
153 if (!gpiod_get_value(fhci->gpiods[GPIO_USBOE]))
154 return -1;
155
156 /* check USBRP */
157 if (gpiod_get_value(fhci->gpiods[GPIO_USBRP]))
158 bits |= 0x2;
159
160 /* check USBRN */
161 if (gpiod_get_value(fhci->gpiods[GPIO_USBRN]))
162 bits |= 0x1;
163
164 return bits;
165 }
166
fhci_mem_free(struct fhci_hcd * fhci)167 static void fhci_mem_free(struct fhci_hcd *fhci)
168 {
169 struct ed *ed;
170 struct ed *next_ed;
171 struct td *td;
172 struct td *next_td;
173
174 list_for_each_entry_safe(ed, next_ed, &fhci->empty_eds, node) {
175 list_del(&ed->node);
176 kfree(ed);
177 }
178
179 list_for_each_entry_safe(td, next_td, &fhci->empty_tds, node) {
180 list_del(&td->node);
181 kfree(td);
182 }
183
184 kfree(fhci->vroot_hub);
185 fhci->vroot_hub = NULL;
186
187 kfree(fhci->hc_list);
188 fhci->hc_list = NULL;
189 }
190
fhci_mem_init(struct fhci_hcd * fhci)191 static int fhci_mem_init(struct fhci_hcd *fhci)
192 {
193 int i;
194
195 fhci->hc_list = kzalloc(sizeof(*fhci->hc_list), GFP_KERNEL);
196 if (!fhci->hc_list)
197 goto err;
198
199 INIT_LIST_HEAD(&fhci->hc_list->ctrl_list);
200 INIT_LIST_HEAD(&fhci->hc_list->bulk_list);
201 INIT_LIST_HEAD(&fhci->hc_list->iso_list);
202 INIT_LIST_HEAD(&fhci->hc_list->intr_list);
203 INIT_LIST_HEAD(&fhci->hc_list->done_list);
204
205 fhci->vroot_hub = kzalloc(sizeof(*fhci->vroot_hub), GFP_KERNEL);
206 if (!fhci->vroot_hub)
207 goto err;
208
209 INIT_LIST_HEAD(&fhci->empty_eds);
210 INIT_LIST_HEAD(&fhci->empty_tds);
211
212 /* initialize work queue to handle done list */
213 fhci_tasklet.data = (unsigned long)fhci;
214 fhci->process_done_task = &fhci_tasklet;
215
216 for (i = 0; i < MAX_TDS; i++) {
217 struct td *td;
218
219 td = kmalloc(sizeof(*td), GFP_KERNEL);
220 if (!td)
221 goto err;
222 fhci_recycle_empty_td(fhci, td);
223 }
224 for (i = 0; i < MAX_EDS; i++) {
225 struct ed *ed;
226
227 ed = kmalloc(sizeof(*ed), GFP_KERNEL);
228 if (!ed)
229 goto err;
230 fhci_recycle_empty_ed(fhci, ed);
231 }
232
233 fhci->active_urbs = 0;
234 return 0;
235 err:
236 fhci_mem_free(fhci);
237 return -ENOMEM;
238 }
239
240 /* destroy the fhci_usb structure */
fhci_usb_free(void * lld)241 static void fhci_usb_free(void *lld)
242 {
243 struct fhci_usb *usb = lld;
244 struct fhci_hcd *fhci;
245
246 if (usb) {
247 fhci = usb->fhci;
248 fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF);
249 fhci_ep0_free(usb);
250 kfree(usb->actual_frame);
251 kfree(usb);
252 }
253 }
254
255 /* initialize the USB */
fhci_usb_init(struct fhci_hcd * fhci)256 static int fhci_usb_init(struct fhci_hcd *fhci)
257 {
258 struct fhci_usb *usb = fhci->usb_lld;
259
260 memset_io(usb->fhci->pram, 0, FHCI_PRAM_SIZE);
261
262 usb->port_status = FHCI_PORT_DISABLED;
263 usb->max_frame_usage = FRAME_TIME_USAGE;
264 usb->sw_transaction_time = SW_FIX_TIME_BETWEEN_TRANSACTION;
265
266 usb->actual_frame = kzalloc(sizeof(*usb->actual_frame), GFP_KERNEL);
267 if (!usb->actual_frame) {
268 fhci_usb_free(usb);
269 return -ENOMEM;
270 }
271
272 INIT_LIST_HEAD(&usb->actual_frame->tds_list);
273
274 /* initializing registers on chip, clear frame number */
275 out_be16(&fhci->pram->frame_num, 0);
276
277 /* clear rx state */
278 out_be32(&fhci->pram->rx_state, 0);
279
280 /* set mask register */
281 usb->saved_msk = (USB_E_TXB_MASK |
282 USB_E_TXE1_MASK |
283 USB_E_IDLE_MASK |
284 USB_E_RESET_MASK | USB_E_SFT_MASK | USB_E_MSF_MASK);
285
286 out_8(&usb->fhci->regs->usb_usmod, USB_MODE_HOST | USB_MODE_EN);
287
288 /* clearing the mask register */
289 out_be16(&usb->fhci->regs->usb_usbmr, 0);
290
291 /* initialing the event register */
292 out_be16(&usb->fhci->regs->usb_usber, 0xffff);
293
294 if (endpoint_zero_init(usb, DEFAULT_DATA_MEM, DEFAULT_RING_LEN) != 0) {
295 fhci_usb_free(usb);
296 return -EINVAL;
297 }
298
299 return 0;
300 }
301
302 /* initialize the fhci_usb struct and the corresponding data staruct */
fhci_create_lld(struct fhci_hcd * fhci)303 static struct fhci_usb *fhci_create_lld(struct fhci_hcd *fhci)
304 {
305 struct fhci_usb *usb;
306
307 /* allocate memory for SCC data structure */
308 usb = kzalloc(sizeof(*usb), GFP_KERNEL);
309 if (!usb)
310 return NULL;
311
312 usb->fhci = fhci;
313 usb->hc_list = fhci->hc_list;
314 usb->vroot_hub = fhci->vroot_hub;
315
316 usb->transfer_confirm = fhci_transfer_confirm_callback;
317
318 return usb;
319 }
320
fhci_start(struct usb_hcd * hcd)321 static int fhci_start(struct usb_hcd *hcd)
322 {
323 int ret;
324 struct fhci_hcd *fhci = hcd_to_fhci(hcd);
325
326 ret = fhci_mem_init(fhci);
327 if (ret) {
328 fhci_err(fhci, "failed to allocate memory\n");
329 goto err;
330 }
331
332 fhci->usb_lld = fhci_create_lld(fhci);
333 if (!fhci->usb_lld) {
334 fhci_err(fhci, "low level driver config failed\n");
335 ret = -ENOMEM;
336 goto err;
337 }
338
339 ret = fhci_usb_init(fhci);
340 if (ret) {
341 fhci_err(fhci, "low level driver initialize failed\n");
342 goto err;
343 }
344
345 spin_lock_init(&fhci->lock);
346
347 /* connect the virtual root hub */
348 fhci->vroot_hub->dev_num = 1; /* this field may be needed to fix */
349 fhci->vroot_hub->hub.wHubStatus = 0;
350 fhci->vroot_hub->hub.wHubChange = 0;
351 fhci->vroot_hub->port.wPortStatus = 0;
352 fhci->vroot_hub->port.wPortChange = 0;
353
354 hcd->state = HC_STATE_RUNNING;
355
356 /*
357 * From here on, hub_wq concurrently accesses the root
358 * hub; drivers will be talking to enumerated devices.
359 * (On restart paths, hub_wq already knows about the root
360 * hub and could find work as soon as we wrote FLAG_CF.)
361 *
362 * Before this point the HC was idle/ready. After, hub_wq
363 * and device drivers may start it running.
364 */
365 fhci_usb_enable(fhci);
366 return 0;
367 err:
368 fhci_mem_free(fhci);
369 return ret;
370 }
371
fhci_stop(struct usb_hcd * hcd)372 static void fhci_stop(struct usb_hcd *hcd)
373 {
374 struct fhci_hcd *fhci = hcd_to_fhci(hcd);
375
376 fhci_usb_disable_interrupt(fhci->usb_lld);
377 fhci_usb_disable(fhci);
378
379 fhci_usb_free(fhci->usb_lld);
380 fhci->usb_lld = NULL;
381 fhci_mem_free(fhci);
382 }
383
fhci_urb_enqueue(struct usb_hcd * hcd,struct urb * urb,gfp_t mem_flags)384 static int fhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
385 gfp_t mem_flags)
386 {
387 struct fhci_hcd *fhci = hcd_to_fhci(hcd);
388 u32 pipe = urb->pipe;
389 int ret;
390 int i;
391 int size = 0;
392 struct urb_priv *urb_priv;
393 unsigned long flags;
394
395 switch (usb_pipetype(pipe)) {
396 case PIPE_CONTROL:
397 /* 1 td fro setup,1 for ack */
398 size = 2;
399 fallthrough;
400 case PIPE_BULK:
401 /* one td for every 4096 bytes(can be up to 8k) */
402 size += urb->transfer_buffer_length / 4096;
403 /* ...add for any remaining bytes... */
404 if ((urb->transfer_buffer_length % 4096) != 0)
405 size++;
406 /* ..and maybe a zero length packet to wrap it up */
407 if (size == 0)
408 size++;
409 else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0
410 && (urb->transfer_buffer_length
411 % usb_maxpacket(urb->dev, pipe)) != 0)
412 size++;
413 break;
414 case PIPE_ISOCHRONOUS:
415 size = urb->number_of_packets;
416 if (size <= 0)
417 return -EINVAL;
418 for (i = 0; i < urb->number_of_packets; i++) {
419 urb->iso_frame_desc[i].actual_length = 0;
420 urb->iso_frame_desc[i].status = (u32) (-EXDEV);
421 }
422 break;
423 case PIPE_INTERRUPT:
424 size = 1;
425 }
426
427 /* allocate the private part of the URB */
428 urb_priv = kzalloc(sizeof(*urb_priv), mem_flags);
429 if (!urb_priv)
430 return -ENOMEM;
431
432 /* allocate the private part of the URB */
433 urb_priv->tds = kcalloc(size, sizeof(*urb_priv->tds), mem_flags);
434 if (!urb_priv->tds) {
435 kfree(urb_priv);
436 return -ENOMEM;
437 }
438
439 spin_lock_irqsave(&fhci->lock, flags);
440
441 ret = usb_hcd_link_urb_to_ep(hcd, urb);
442 if (ret)
443 goto err;
444
445 /* fill the private part of the URB */
446 urb_priv->num_of_tds = size;
447
448 urb->status = -EINPROGRESS;
449 urb->actual_length = 0;
450 urb->error_count = 0;
451 urb->hcpriv = urb_priv;
452
453 fhci_queue_urb(fhci, urb);
454 err:
455 if (ret) {
456 kfree(urb_priv->tds);
457 kfree(urb_priv);
458 }
459 spin_unlock_irqrestore(&fhci->lock, flags);
460 return ret;
461 }
462
463 /* dequeue FHCI URB */
fhci_urb_dequeue(struct usb_hcd * hcd,struct urb * urb,int status)464 static int fhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
465 {
466 struct fhci_hcd *fhci = hcd_to_fhci(hcd);
467 struct fhci_usb *usb = fhci->usb_lld;
468 int ret = -EINVAL;
469 unsigned long flags;
470
471 if (!urb || !urb->dev || !urb->dev->bus)
472 goto out;
473
474 spin_lock_irqsave(&fhci->lock, flags);
475
476 ret = usb_hcd_check_unlink_urb(hcd, urb, status);
477 if (ret)
478 goto out2;
479
480 if (usb->port_status != FHCI_PORT_DISABLED) {
481 struct urb_priv *urb_priv;
482
483 /*
484 * flag the urb's data for deletion in some upcoming
485 * SF interrupt's delete list processing
486 */
487 urb_priv = urb->hcpriv;
488
489 if (!urb_priv || (urb_priv->state == URB_DEL))
490 goto out2;
491
492 urb_priv->state = URB_DEL;
493
494 /* already pending? */
495 urb_priv->ed->state = FHCI_ED_URB_DEL;
496 } else {
497 fhci_urb_complete_free(fhci, urb);
498 }
499
500 out2:
501 spin_unlock_irqrestore(&fhci->lock, flags);
502 out:
503 return ret;
504 }
505
fhci_endpoint_disable(struct usb_hcd * hcd,struct usb_host_endpoint * ep)506 static void fhci_endpoint_disable(struct usb_hcd *hcd,
507 struct usb_host_endpoint *ep)
508 {
509 struct fhci_hcd *fhci;
510 struct ed *ed;
511 unsigned long flags;
512
513 fhci = hcd_to_fhci(hcd);
514 spin_lock_irqsave(&fhci->lock, flags);
515 ed = ep->hcpriv;
516 if (ed) {
517 while (ed->td_head != NULL) {
518 struct td *td = fhci_remove_td_from_ed(ed);
519 fhci_urb_complete_free(fhci, td->urb);
520 }
521 fhci_recycle_empty_ed(fhci, ed);
522 ep->hcpriv = NULL;
523 }
524 spin_unlock_irqrestore(&fhci->lock, flags);
525 }
526
fhci_get_frame_number(struct usb_hcd * hcd)527 static int fhci_get_frame_number(struct usb_hcd *hcd)
528 {
529 struct fhci_hcd *fhci = hcd_to_fhci(hcd);
530
531 return get_frame_num(fhci);
532 }
533
534 static const struct hc_driver fhci_driver = {
535 .description = "fsl,usb-fhci",
536 .product_desc = "FHCI HOST Controller",
537 .hcd_priv_size = sizeof(struct fhci_hcd),
538
539 /* generic hardware linkage */
540 .irq = fhci_irq,
541 .flags = HCD_DMA | HCD_USB11 | HCD_MEMORY,
542
543 /* basic lifecycle operation */
544 .start = fhci_start,
545 .stop = fhci_stop,
546
547 /* managing i/o requests and associated device resources */
548 .urb_enqueue = fhci_urb_enqueue,
549 .urb_dequeue = fhci_urb_dequeue,
550 .endpoint_disable = fhci_endpoint_disable,
551
552 /* scheduling support */
553 .get_frame_number = fhci_get_frame_number,
554
555 /* root hub support */
556 .hub_status_data = fhci_hub_status_data,
557 .hub_control = fhci_hub_control,
558 };
559
of_fhci_probe(struct platform_device * ofdev)560 static int of_fhci_probe(struct platform_device *ofdev)
561 {
562 struct device *dev = &ofdev->dev;
563 struct device_node *node = dev->of_node;
564 struct usb_hcd *hcd;
565 struct fhci_hcd *fhci;
566 struct resource usb_regs;
567 unsigned long pram_addr;
568 unsigned int usb_irq;
569 const char *sprop;
570 const u32 *iprop;
571 int size;
572 int ret;
573 int i;
574 int j;
575
576 if (usb_disabled())
577 return -ENODEV;
578
579 sprop = of_get_property(node, "mode", NULL);
580 if (sprop && strcmp(sprop, "host"))
581 return -ENODEV;
582
583 hcd = usb_create_hcd(&fhci_driver, dev, dev_name(dev));
584 if (!hcd) {
585 dev_err(dev, "could not create hcd\n");
586 return -ENOMEM;
587 }
588
589 fhci = hcd_to_fhci(hcd);
590 hcd->self.controller = dev;
591 dev_set_drvdata(dev, hcd);
592
593 iprop = of_get_property(node, "hub-power-budget", &size);
594 if (iprop && size == sizeof(*iprop))
595 hcd->power_budget = *iprop;
596
597 /* FHCI registers. */
598 ret = of_address_to_resource(node, 0, &usb_regs);
599 if (ret) {
600 dev_err(dev, "could not get regs\n");
601 goto err_regs;
602 }
603
604 hcd->regs = ioremap(usb_regs.start, resource_size(&usb_regs));
605 if (!hcd->regs) {
606 dev_err(dev, "could not ioremap regs\n");
607 ret = -ENOMEM;
608 goto err_regs;
609 }
610 fhci->regs = hcd->regs;
611
612 /* Parameter RAM. */
613 iprop = of_get_property(node, "reg", &size);
614 if (!iprop || size < sizeof(*iprop) * 4) {
615 dev_err(dev, "can't get pram offset\n");
616 ret = -EINVAL;
617 goto err_pram;
618 }
619
620 pram_addr = cpm_muram_alloc(FHCI_PRAM_SIZE, 64);
621 if (IS_ERR_VALUE(pram_addr)) {
622 dev_err(dev, "failed to allocate usb pram\n");
623 ret = -ENOMEM;
624 goto err_pram;
625 }
626
627 qe_issue_cmd(QE_ASSIGN_PAGE_TO_DEVICE, QE_CR_SUBBLOCK_USB,
628 QE_CR_PROTOCOL_UNSPECIFIED, pram_addr);
629 fhci->pram = cpm_muram_addr(pram_addr);
630
631 /* GPIOs and pins */
632 for (i = 0; i < NUM_GPIOS; i++) {
633 if (i < GPIO_SPEED)
634 fhci->gpiods[i] = devm_gpiod_get_index(dev,
635 NULL, i, GPIOD_IN);
636
637 else
638 fhci->gpiods[i] = devm_gpiod_get_index_optional(dev,
639 NULL, i, GPIOD_OUT_LOW);
640
641 if (IS_ERR(fhci->gpiods[i])) {
642 dev_err(dev, "incorrect GPIO%d: %ld\n",
643 i, PTR_ERR(fhci->gpiods[i]));
644 goto err_gpios;
645 }
646 if (!fhci->gpiods[i]) {
647 dev_info(dev, "assuming board doesn't have "
648 "%s gpio\n", i == GPIO_SPEED ?
649 "speed" : "power");
650 }
651 }
652
653 for (j = 0; j < NUM_PINS; j++) {
654 fhci->pins[j] = qe_pin_request(node, j);
655 if (IS_ERR(fhci->pins[j])) {
656 ret = PTR_ERR(fhci->pins[j]);
657 dev_err(dev, "can't get pin %d: %d\n", j, ret);
658 goto err_pins;
659 }
660 }
661
662 /* Frame limit timer and its interrupt. */
663 fhci->timer = gtm_get_timer16();
664 if (IS_ERR(fhci->timer)) {
665 ret = PTR_ERR(fhci->timer);
666 dev_err(dev, "failed to request qe timer: %i", ret);
667 goto err_get_timer;
668 }
669
670 ret = request_irq(fhci->timer->irq, fhci_frame_limit_timer_irq,
671 0, "qe timer (usb)", hcd);
672 if (ret) {
673 dev_err(dev, "failed to request timer irq");
674 goto err_timer_irq;
675 }
676
677 /* USB Host interrupt. */
678 usb_irq = irq_of_parse_and_map(node, 0);
679 if (usb_irq == NO_IRQ) {
680 dev_err(dev, "could not get usb irq\n");
681 ret = -EINVAL;
682 goto err_usb_irq;
683 }
684
685 /* Clocks. */
686 sprop = of_get_property(node, "fsl,fullspeed-clock", NULL);
687 if (sprop) {
688 fhci->fullspeed_clk = qe_clock_source(sprop);
689 if (fhci->fullspeed_clk == QE_CLK_DUMMY) {
690 dev_err(dev, "wrong fullspeed-clock\n");
691 ret = -EINVAL;
692 goto err_clocks;
693 }
694 }
695
696 sprop = of_get_property(node, "fsl,lowspeed-clock", NULL);
697 if (sprop) {
698 fhci->lowspeed_clk = qe_clock_source(sprop);
699 if (fhci->lowspeed_clk == QE_CLK_DUMMY) {
700 dev_err(dev, "wrong lowspeed-clock\n");
701 ret = -EINVAL;
702 goto err_clocks;
703 }
704 }
705
706 if (fhci->fullspeed_clk == QE_CLK_NONE &&
707 fhci->lowspeed_clk == QE_CLK_NONE) {
708 dev_err(dev, "no clocks specified\n");
709 ret = -EINVAL;
710 goto err_clocks;
711 }
712
713 dev_info(dev, "at 0x%p, irq %d\n", hcd->regs, usb_irq);
714
715 fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF);
716
717 /* Start with full-speed, if possible. */
718 if (fhci->fullspeed_clk != QE_CLK_NONE) {
719 fhci_config_transceiver(fhci, FHCI_PORT_FULL);
720 qe_usb_clock_set(fhci->fullspeed_clk, USB_CLOCK);
721 } else {
722 fhci_config_transceiver(fhci, FHCI_PORT_LOW);
723 qe_usb_clock_set(fhci->lowspeed_clk, USB_CLOCK >> 3);
724 }
725
726 /* Clear and disable any pending interrupts. */
727 out_be16(&fhci->regs->usb_usber, 0xffff);
728 out_be16(&fhci->regs->usb_usbmr, 0);
729
730 ret = usb_add_hcd(hcd, usb_irq, 0);
731 if (ret < 0)
732 goto err_add_hcd;
733
734 device_wakeup_enable(hcd->self.controller);
735
736 fhci_dfs_create(fhci);
737
738 return 0;
739
740 err_add_hcd:
741 err_clocks:
742 irq_dispose_mapping(usb_irq);
743 err_usb_irq:
744 free_irq(fhci->timer->irq, hcd);
745 err_timer_irq:
746 gtm_put_timer16(fhci->timer);
747 err_get_timer:
748 err_pins:
749 while (--j >= 0)
750 qe_pin_free(fhci->pins[j]);
751 err_gpios:
752 cpm_muram_free(pram_addr);
753 err_pram:
754 iounmap(hcd->regs);
755 err_regs:
756 usb_put_hcd(hcd);
757 return ret;
758 }
759
fhci_remove(struct device * dev)760 static int fhci_remove(struct device *dev)
761 {
762 struct usb_hcd *hcd = dev_get_drvdata(dev);
763 struct fhci_hcd *fhci = hcd_to_fhci(hcd);
764 int j;
765
766 usb_remove_hcd(hcd);
767 free_irq(fhci->timer->irq, hcd);
768 gtm_put_timer16(fhci->timer);
769 cpm_muram_free(cpm_muram_offset(fhci->pram));
770 for (j = 0; j < NUM_PINS; j++)
771 qe_pin_free(fhci->pins[j]);
772 fhci_dfs_destroy(fhci);
773 usb_put_hcd(hcd);
774 return 0;
775 }
776
of_fhci_remove(struct platform_device * ofdev)777 static int of_fhci_remove(struct platform_device *ofdev)
778 {
779 return fhci_remove(&ofdev->dev);
780 }
781
782 static const struct of_device_id of_fhci_match[] = {
783 { .compatible = "fsl,mpc8323-qe-usb", },
784 {},
785 };
786 MODULE_DEVICE_TABLE(of, of_fhci_match);
787
788 static struct platform_driver of_fhci_driver = {
789 .driver = {
790 .name = "fsl,usb-fhci",
791 .of_match_table = of_fhci_match,
792 },
793 .probe = of_fhci_probe,
794 .remove = of_fhci_remove,
795 };
796
797 module_platform_driver(of_fhci_driver);
798
799 MODULE_DESCRIPTION("USB Freescale Host Controller Interface Driver");
800 MODULE_AUTHOR("Shlomi Gridish <gridish@freescale.com>, "
801 "Jerry Huang <Chang-Ming.Huang@freescale.com>, "
802 "Anton Vorontsov <avorontsov@ru.mvista.com>");
803 MODULE_LICENSE("GPL");
804