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/of_platform.h>
29 #include <linux/of_gpio.h>
30 #include <asm/qe.h>
31 #include <asm/fsl_gtm.h>
32 #include "../core/hcd.h"
33 #include "fhci.h"
34
fhci_start_sof_timer(struct fhci_hcd * fhci)35 void fhci_start_sof_timer(struct fhci_hcd *fhci)
36 {
37 fhci_dbg(fhci, "-> %s\n", __func__);
38
39 /* clear frame_n */
40 out_be16(&fhci->pram->frame_num, 0);
41
42 out_be16(&fhci->regs->usb_sof_tmr, 0);
43 setbits8(&fhci->regs->usb_mod, USB_MODE_SFTE);
44
45 fhci_dbg(fhci, "<- %s\n", __func__);
46 }
47
fhci_stop_sof_timer(struct fhci_hcd * fhci)48 void fhci_stop_sof_timer(struct fhci_hcd *fhci)
49 {
50 fhci_dbg(fhci, "-> %s\n", __func__);
51
52 clrbits8(&fhci->regs->usb_mod, USB_MODE_SFTE);
53 gtm_stop_timer16(fhci->timer);
54
55 fhci_dbg(fhci, "<- %s\n", __func__);
56 }
57
fhci_get_sof_timer_count(struct fhci_usb * usb)58 u16 fhci_get_sof_timer_count(struct fhci_usb *usb)
59 {
60 return be16_to_cpu(in_be16(&usb->fhci->regs->usb_sof_tmr) / 12);
61 }
62
63 /* initialize the endpoint zero */
endpoint_zero_init(struct fhci_usb * usb,enum fhci_mem_alloc data_mem,u32 ring_len)64 static u32 endpoint_zero_init(struct fhci_usb *usb,
65 enum fhci_mem_alloc data_mem,
66 u32 ring_len)
67 {
68 u32 rc;
69
70 rc = fhci_create_ep(usb, data_mem, ring_len);
71 if (rc)
72 return rc;
73
74 /* inilialize endpoint registers */
75 fhci_init_ep_registers(usb, usb->ep0, data_mem);
76
77 return 0;
78 }
79
80 /* enable the USB interrupts */
fhci_usb_enable_interrupt(struct fhci_usb * usb)81 void fhci_usb_enable_interrupt(struct fhci_usb *usb)
82 {
83 struct fhci_hcd *fhci = usb->fhci;
84
85 if (usb->intr_nesting_cnt == 1) {
86 /* initialize the USB interrupt */
87 enable_irq(fhci_to_hcd(fhci)->irq);
88
89 /* initialize the event register and mask register */
90 out_be16(&usb->fhci->regs->usb_event, 0xffff);
91 out_be16(&usb->fhci->regs->usb_mask, usb->saved_msk);
92
93 /* enable the timer interrupts */
94 enable_irq(fhci->timer->irq);
95 } else if (usb->intr_nesting_cnt > 1)
96 fhci_info(fhci, "unbalanced USB interrupts nesting\n");
97 usb->intr_nesting_cnt--;
98 }
99
100 /* diable the usb interrupt */
fhci_usb_disable_interrupt(struct fhci_usb * usb)101 void fhci_usb_disable_interrupt(struct fhci_usb *usb)
102 {
103 struct fhci_hcd *fhci = usb->fhci;
104
105 if (usb->intr_nesting_cnt == 0) {
106 /* diable the timer interrupt */
107 disable_irq_nosync(fhci->timer->irq);
108
109 /* disable the usb interrupt */
110 disable_irq_nosync(fhci_to_hcd(fhci)->irq);
111 out_be16(&usb->fhci->regs->usb_mask, 0);
112 }
113 usb->intr_nesting_cnt++;
114 }
115
116 /* enable the USB controller */
fhci_usb_enable(struct fhci_hcd * fhci)117 static u32 fhci_usb_enable(struct fhci_hcd *fhci)
118 {
119 struct fhci_usb *usb = fhci->usb_lld;
120
121 out_be16(&usb->fhci->regs->usb_event, 0xffff);
122 out_be16(&usb->fhci->regs->usb_mask, usb->saved_msk);
123 setbits8(&usb->fhci->regs->usb_mod, USB_MODE_EN);
124
125 mdelay(100);
126
127 return 0;
128 }
129
130 /* disable the USB controller */
fhci_usb_disable(struct fhci_hcd * fhci)131 static u32 fhci_usb_disable(struct fhci_hcd *fhci)
132 {
133 struct fhci_usb *usb = fhci->usb_lld;
134
135 fhci_usb_disable_interrupt(usb);
136 fhci_port_disable(fhci);
137
138 /* disable the usb controller */
139 if (usb->port_status == FHCI_PORT_FULL ||
140 usb->port_status == FHCI_PORT_LOW)
141 fhci_device_disconnected_interrupt(fhci);
142
143 clrbits8(&usb->fhci->regs->usb_mod, USB_MODE_EN);
144
145 return 0;
146 }
147
148 /* check the bus state by polling the QE bit on the IO ports */
fhci_ioports_check_bus_state(struct fhci_hcd * fhci)149 int fhci_ioports_check_bus_state(struct fhci_hcd *fhci)
150 {
151 u8 bits = 0;
152
153 /* check USBOE,if transmitting,exit */
154 if (!gpio_get_value(fhci->gpios[GPIO_USBOE]))
155 return -1;
156
157 /* check USBRP */
158 if (gpio_get_value(fhci->gpios[GPIO_USBRP]))
159 bits |= 0x2;
160
161 /* check USBRN */
162 if (gpio_get_value(fhci->gpios[GPIO_USBRN]))
163 bits |= 0x1;
164
165 return bits;
166 }
167
fhci_mem_free(struct fhci_hcd * fhci)168 static void fhci_mem_free(struct fhci_hcd *fhci)
169 {
170 struct ed *ed;
171 struct ed *next_ed;
172 struct td *td;
173 struct td *next_td;
174
175 list_for_each_entry_safe(ed, next_ed, &fhci->empty_eds, node) {
176 list_del(&ed->node);
177 kfree(ed);
178 }
179
180 list_for_each_entry_safe(td, next_td, &fhci->empty_tds, node) {
181 list_del(&td->node);
182 kfree(td);
183 }
184
185 kfree(fhci->vroot_hub);
186 fhci->vroot_hub = NULL;
187
188 kfree(fhci->hc_list);
189 fhci->hc_list = NULL;
190 }
191
fhci_mem_init(struct fhci_hcd * fhci)192 static int fhci_mem_init(struct fhci_hcd *fhci)
193 {
194 int i;
195
196 fhci->hc_list = kzalloc(sizeof(*fhci->hc_list), GFP_KERNEL);
197 if (!fhci->hc_list)
198 goto err;
199
200 INIT_LIST_HEAD(&fhci->hc_list->ctrl_list);
201 INIT_LIST_HEAD(&fhci->hc_list->bulk_list);
202 INIT_LIST_HEAD(&fhci->hc_list->iso_list);
203 INIT_LIST_HEAD(&fhci->hc_list->intr_list);
204 INIT_LIST_HEAD(&fhci->hc_list->done_list);
205
206 fhci->vroot_hub = kzalloc(sizeof(*fhci->vroot_hub), GFP_KERNEL);
207 if (!fhci->vroot_hub)
208 goto err;
209
210 INIT_LIST_HEAD(&fhci->empty_eds);
211 INIT_LIST_HEAD(&fhci->empty_tds);
212
213 /* initialize work queue to handle done list */
214 fhci_tasklet.data = (unsigned long)fhci;
215 fhci->process_done_task = &fhci_tasklet;
216
217 for (i = 0; i < MAX_TDS; i++) {
218 struct td *td;
219
220 td = kmalloc(sizeof(*td), GFP_KERNEL);
221 if (!td)
222 goto err;
223 fhci_recycle_empty_td(fhci, td);
224 }
225 for (i = 0; i < MAX_EDS; i++) {
226 struct ed *ed;
227
228 ed = kmalloc(sizeof(*ed), GFP_KERNEL);
229 if (!ed)
230 goto err;
231 fhci_recycle_empty_ed(fhci, ed);
232 }
233
234 fhci->active_urbs = 0;
235 return 0;
236 err:
237 fhci_mem_free(fhci);
238 return -ENOMEM;
239 }
240
241 /* destroy the fhci_usb structure */
fhci_usb_free(void * lld)242 static void fhci_usb_free(void *lld)
243 {
244 struct fhci_usb *usb = lld;
245 struct fhci_hcd *fhci = usb->fhci;
246
247 if (usb) {
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_mod, USB_MODE_HOST | USB_MODE_EN);
287
288 /* clearing the mask register */
289 out_be16(&usb->fhci->regs->usb_mask, 0);
290
291 /* initialing the event register */
292 out_be16(&usb->fhci->regs->usb_event, 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 fhci_err(fhci, "no memory for SCC data struct\n");
311 return NULL;
312 }
313
314 usb->fhci = fhci;
315 usb->hc_list = fhci->hc_list;
316 usb->vroot_hub = fhci->vroot_hub;
317
318 usb->transfer_confirm = fhci_transfer_confirm_callback;
319
320 return usb;
321 }
322
fhci_start(struct usb_hcd * hcd)323 static int fhci_start(struct usb_hcd *hcd)
324 {
325 int ret;
326 struct fhci_hcd *fhci = hcd_to_fhci(hcd);
327
328 ret = fhci_mem_init(fhci);
329 if (ret) {
330 fhci_err(fhci, "failed to allocate memory\n");
331 goto err;
332 }
333
334 fhci->usb_lld = fhci_create_lld(fhci);
335 if (!fhci->usb_lld) {
336 fhci_err(fhci, "low level driver config failed\n");
337 ret = -ENOMEM;
338 goto err;
339 }
340
341 ret = fhci_usb_init(fhci);
342 if (ret) {
343 fhci_err(fhci, "low level driver initialize failed\n");
344 goto err;
345 }
346
347 spin_lock_init(&fhci->lock);
348
349 /* connect the virtual root hub */
350 fhci->vroot_hub->dev_num = 1; /* this field may be needed to fix */
351 fhci->vroot_hub->hub.wHubStatus = 0;
352 fhci->vroot_hub->hub.wHubChange = 0;
353 fhci->vroot_hub->port.wPortStatus = 0;
354 fhci->vroot_hub->port.wPortChange = 0;
355
356 hcd->state = HC_STATE_RUNNING;
357
358 /*
359 * From here on, khubd concurrently accesses the root
360 * hub; drivers will be talking to enumerated devices.
361 * (On restart paths, khubd already knows about the root
362 * hub and could find work as soon as we wrote FLAG_CF.)
363 *
364 * Before this point the HC was idle/ready. After, khubd
365 * and device drivers may start it running.
366 */
367 fhci_usb_enable(fhci);
368 return 0;
369 err:
370 fhci_mem_free(fhci);
371 return ret;
372 }
373
fhci_stop(struct usb_hcd * hcd)374 static void fhci_stop(struct usb_hcd *hcd)
375 {
376 struct fhci_hcd *fhci = hcd_to_fhci(hcd);
377
378 fhci_usb_disable_interrupt(fhci->usb_lld);
379 fhci_usb_disable(fhci);
380
381 fhci_usb_free(fhci->usb_lld);
382 fhci->usb_lld = NULL;
383 fhci_mem_free(fhci);
384 }
385
fhci_urb_enqueue(struct usb_hcd * hcd,struct urb * urb,gfp_t mem_flags)386 static int fhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
387 gfp_t mem_flags)
388 {
389 struct fhci_hcd *fhci = hcd_to_fhci(hcd);
390 u32 pipe = urb->pipe;
391 int ret;
392 int i;
393 int size = 0;
394 struct urb_priv *urb_priv;
395 unsigned long flags;
396
397 switch (usb_pipetype(pipe)) {
398 case PIPE_CONTROL:
399 /* 1 td fro setup,1 for ack */
400 size = 2;
401 case PIPE_BULK:
402 /* one td for every 4096 bytes(can be upto 8k) */
403 size += urb->transfer_buffer_length / 4096;
404 /* ...add for any remaining bytes... */
405 if ((urb->transfer_buffer_length % 4096) != 0)
406 size++;
407 /* ..and maybe a zero length packet to wrap it up */
408 if (size == 0)
409 size++;
410 else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0
411 && (urb->transfer_buffer_length
412 % usb_maxpacket(urb->dev, pipe,
413 usb_pipeout(pipe))) != 0)
414 size++;
415 break;
416 case PIPE_ISOCHRONOUS:
417 size = urb->number_of_packets;
418 if (size <= 0)
419 return -EINVAL;
420 for (i = 0; i < urb->number_of_packets; i++) {
421 urb->iso_frame_desc[i].actual_length = 0;
422 urb->iso_frame_desc[i].status = (u32) (-EXDEV);
423 }
424 break;
425 case PIPE_INTERRUPT:
426 size = 1;
427 }
428
429 /* allocate the private part of the URB */
430 urb_priv = kzalloc(sizeof(*urb_priv), mem_flags);
431 if (!urb_priv)
432 return -ENOMEM;
433
434 /* allocate the private part of the URB */
435 urb_priv->tds = kzalloc(size * sizeof(struct td), mem_flags);
436 if (!urb_priv->tds) {
437 kfree(urb_priv);
438 return -ENOMEM;
439 }
440
441 spin_lock_irqsave(&fhci->lock, flags);
442
443 ret = usb_hcd_link_urb_to_ep(hcd, urb);
444 if (ret)
445 goto err;
446
447 /* fill the private part of the URB */
448 urb_priv->num_of_tds = size;
449
450 urb->status = -EINPROGRESS;
451 urb->actual_length = 0;
452 urb->error_count = 0;
453 urb->hcpriv = urb_priv;
454
455 fhci_queue_urb(fhci, urb);
456 err:
457 if (ret) {
458 kfree(urb_priv->tds);
459 kfree(urb_priv);
460 }
461 spin_unlock_irqrestore(&fhci->lock, flags);
462 return ret;
463 }
464
465 /* dequeue FHCI URB */
fhci_urb_dequeue(struct usb_hcd * hcd,struct urb * urb,int status)466 static int fhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
467 {
468 struct fhci_hcd *fhci = hcd_to_fhci(hcd);
469 struct fhci_usb *usb = fhci->usb_lld;
470 int ret = -EINVAL;
471 unsigned long flags;
472
473 if (!urb || !urb->dev || !urb->dev->bus)
474 goto out;
475
476 spin_lock_irqsave(&fhci->lock, flags);
477
478 ret = usb_hcd_check_unlink_urb(hcd, urb, status);
479 if (ret)
480 goto out2;
481
482 if (usb->port_status != FHCI_PORT_DISABLED) {
483 struct urb_priv *urb_priv;
484
485 /*
486 * flag the urb's data for deletion in some upcoming
487 * SF interrupt's delete list processing
488 */
489 urb_priv = urb->hcpriv;
490
491 if (!urb_priv || (urb_priv->state == URB_DEL))
492 goto out2;
493
494 urb_priv->state = URB_DEL;
495
496 /* already pending? */
497 urb_priv->ed->state = FHCI_ED_URB_DEL;
498 } else {
499 fhci_urb_complete_free(fhci, urb);
500 }
501
502 out2:
503 spin_unlock_irqrestore(&fhci->lock, flags);
504 out:
505 return ret;
506 }
507
fhci_endpoint_disable(struct usb_hcd * hcd,struct usb_host_endpoint * ep)508 static void fhci_endpoint_disable(struct usb_hcd *hcd,
509 struct usb_host_endpoint *ep)
510 {
511 struct fhci_hcd *fhci;
512 struct ed *ed;
513 unsigned long flags;
514
515 fhci = hcd_to_fhci(hcd);
516 spin_lock_irqsave(&fhci->lock, flags);
517 ed = ep->hcpriv;
518 if (ed) {
519 while (ed->td_head != NULL) {
520 struct td *td = fhci_remove_td_from_ed(ed);
521 fhci_urb_complete_free(fhci, td->urb);
522 }
523 fhci_recycle_empty_ed(fhci, ed);
524 ep->hcpriv = NULL;
525 }
526 spin_unlock_irqrestore(&fhci->lock, flags);
527 }
528
fhci_get_frame_number(struct usb_hcd * hcd)529 static int fhci_get_frame_number(struct usb_hcd *hcd)
530 {
531 struct fhci_hcd *fhci = hcd_to_fhci(hcd);
532
533 return get_frame_num(fhci);
534 }
535
536 static const struct hc_driver fhci_driver = {
537 .description = "fsl,usb-fhci",
538 .product_desc = "FHCI HOST Controller",
539 .hcd_priv_size = sizeof(struct fhci_hcd),
540
541 /* generic hardware linkage */
542 .irq = fhci_irq,
543 .flags = HCD_USB11 | HCD_MEMORY,
544
545 /* basic lifecycle operation */
546 .start = fhci_start,
547 .stop = fhci_stop,
548
549 /* managing i/o requests and associated device resources */
550 .urb_enqueue = fhci_urb_enqueue,
551 .urb_dequeue = fhci_urb_dequeue,
552 .endpoint_disable = fhci_endpoint_disable,
553
554 /* scheduling support */
555 .get_frame_number = fhci_get_frame_number,
556
557 /* root hub support */
558 .hub_status_data = fhci_hub_status_data,
559 .hub_control = fhci_hub_control,
560 };
561
of_fhci_probe(struct of_device * ofdev,const struct of_device_id * ofid)562 static int __devinit of_fhci_probe(struct of_device *ofdev,
563 const struct of_device_id *ofid)
564 {
565 struct device *dev = &ofdev->dev;
566 struct device_node *node = ofdev->node;
567 struct usb_hcd *hcd;
568 struct fhci_hcd *fhci;
569 struct resource usb_regs;
570 unsigned long pram_addr;
571 unsigned int usb_irq;
572 const char *sprop;
573 const u32 *iprop;
574 int size;
575 int ret;
576 int i;
577 int j;
578
579 if (usb_disabled())
580 return -ENODEV;
581
582 sprop = of_get_property(node, "mode", NULL);
583 if (sprop && strcmp(sprop, "host"))
584 return -ENODEV;
585
586 hcd = usb_create_hcd(&fhci_driver, dev, dev->bus_id);
587 if (!hcd) {
588 dev_err(dev, "could not create hcd\n");
589 return -ENOMEM;
590 }
591
592 fhci = hcd_to_fhci(hcd);
593 hcd->self.controller = dev;
594 dev_set_drvdata(dev, hcd);
595
596 iprop = of_get_property(node, "hub-power-budget", &size);
597 if (iprop && size == sizeof(*iprop))
598 hcd->power_budget = *iprop;
599
600 /* FHCI registers. */
601 ret = of_address_to_resource(node, 0, &usb_regs);
602 if (ret) {
603 dev_err(dev, "could not get regs\n");
604 goto err_regs;
605 }
606
607 hcd->regs = ioremap(usb_regs.start, usb_regs.end - usb_regs.start + 1);
608 if (!hcd->regs) {
609 dev_err(dev, "could not ioremap regs\n");
610 ret = -ENOMEM;
611 goto err_regs;
612 }
613 fhci->regs = hcd->regs;
614
615 /* Parameter RAM. */
616 iprop = of_get_property(node, "reg", &size);
617 if (!iprop || size < sizeof(*iprop) * 4) {
618 dev_err(dev, "can't get pram offset\n");
619 ret = -EINVAL;
620 goto err_pram;
621 }
622
623 pram_addr = cpm_muram_alloc_fixed(iprop[2], FHCI_PRAM_SIZE);
624 if (IS_ERR_VALUE(pram_addr)) {
625 dev_err(dev, "failed to allocate usb pram\n");
626 ret = -ENOMEM;
627 goto err_pram;
628 }
629 fhci->pram = cpm_muram_addr(pram_addr);
630
631 /* GPIOs and pins */
632 for (i = 0; i < NUM_GPIOS; i++) {
633 int gpio;
634 enum of_gpio_flags flags;
635
636 gpio = of_get_gpio_flags(node, i, &flags);
637 fhci->gpios[i] = gpio;
638 fhci->alow_gpios[i] = flags & OF_GPIO_ACTIVE_LOW;
639
640 if (!gpio_is_valid(gpio)) {
641 if (i < GPIO_SPEED) {
642 dev_err(dev, "incorrect GPIO%d: %d\n",
643 i, gpio);
644 goto err_gpios;
645 } else {
646 dev_info(dev, "assuming board doesn't have "
647 "%s gpio\n", i == GPIO_SPEED ?
648 "speed" : "power");
649 continue;
650 }
651 }
652
653 ret = gpio_request(gpio, dev->bus_id);
654 if (ret) {
655 dev_err(dev, "failed to request gpio %d", i);
656 goto err_gpios;
657 }
658
659 if (i >= GPIO_SPEED) {
660 ret = gpio_direction_output(gpio, 0);
661 if (ret) {
662 dev_err(dev, "failed to set gpio %d as "
663 "an output\n", i);
664 i++;
665 goto err_gpios;
666 }
667 }
668 }
669
670 for (j = 0; j < NUM_PINS; j++) {
671 fhci->pins[j] = qe_pin_request(ofdev->node, j);
672 if (IS_ERR(fhci->pins[j])) {
673 ret = PTR_ERR(fhci->pins[j]);
674 dev_err(dev, "can't get pin %d: %d\n", j, ret);
675 goto err_pins;
676 }
677 }
678
679 /* Frame limit timer and its interrupt. */
680 fhci->timer = gtm_get_timer16();
681 if (IS_ERR(fhci->timer)) {
682 ret = PTR_ERR(fhci->timer);
683 dev_err(dev, "failed to request qe timer: %i", ret);
684 goto err_get_timer;
685 }
686
687 ret = request_irq(fhci->timer->irq, fhci_frame_limit_timer_irq,
688 IRQF_DISABLED, "qe timer (usb)", hcd);
689 if (ret) {
690 dev_err(dev, "failed to request timer irq");
691 goto err_timer_irq;
692 }
693
694 /* USB Host interrupt. */
695 usb_irq = irq_of_parse_and_map(node, 0);
696 if (usb_irq == NO_IRQ) {
697 dev_err(dev, "could not get usb irq\n");
698 ret = -EINVAL;
699 goto err_usb_irq;
700 }
701
702 /* Clocks. */
703 sprop = of_get_property(node, "fsl,fullspeed-clock", NULL);
704 if (sprop) {
705 fhci->fullspeed_clk = qe_clock_source(sprop);
706 if (fhci->fullspeed_clk == QE_CLK_DUMMY) {
707 dev_err(dev, "wrong fullspeed-clock\n");
708 ret = -EINVAL;
709 goto err_clocks;
710 }
711 }
712
713 sprop = of_get_property(node, "fsl,lowspeed-clock", NULL);
714 if (sprop) {
715 fhci->lowspeed_clk = qe_clock_source(sprop);
716 if (fhci->lowspeed_clk == QE_CLK_DUMMY) {
717 dev_err(dev, "wrong lowspeed-clock\n");
718 ret = -EINVAL;
719 goto err_clocks;
720 }
721 }
722
723 if (fhci->fullspeed_clk == QE_CLK_NONE &&
724 fhci->lowspeed_clk == QE_CLK_NONE) {
725 dev_err(dev, "no clocks specified\n");
726 ret = -EINVAL;
727 goto err_clocks;
728 }
729
730 dev_info(dev, "at 0x%p, irq %d\n", hcd->regs, usb_irq);
731
732 fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF);
733
734 /* Start with full-speed, if possible. */
735 if (fhci->fullspeed_clk != QE_CLK_NONE) {
736 fhci_config_transceiver(fhci, FHCI_PORT_FULL);
737 qe_usb_clock_set(fhci->fullspeed_clk, USB_CLOCK);
738 } else {
739 fhci_config_transceiver(fhci, FHCI_PORT_LOW);
740 qe_usb_clock_set(fhci->lowspeed_clk, USB_CLOCK >> 3);
741 }
742
743 /* Clear and disable any pending interrupts. */
744 out_be16(&fhci->regs->usb_event, 0xffff);
745 out_be16(&fhci->regs->usb_mask, 0);
746
747 ret = usb_add_hcd(hcd, usb_irq, IRQF_DISABLED);
748 if (ret < 0)
749 goto err_add_hcd;
750
751 fhci_dfs_create(fhci);
752
753 return 0;
754
755 err_add_hcd:
756 err_clocks:
757 irq_dispose_mapping(usb_irq);
758 err_usb_irq:
759 free_irq(fhci->timer->irq, hcd);
760 err_timer_irq:
761 gtm_put_timer16(fhci->timer);
762 err_get_timer:
763 err_pins:
764 while (--j >= 0)
765 qe_pin_free(fhci->pins[j]);
766 err_gpios:
767 while (--i >= 0) {
768 if (gpio_is_valid(fhci->gpios[i]))
769 gpio_free(fhci->gpios[i]);
770 }
771 cpm_muram_free(pram_addr);
772 err_pram:
773 iounmap(hcd->regs);
774 err_regs:
775 usb_put_hcd(hcd);
776 return ret;
777 }
778
fhci_remove(struct device * dev)779 static int __devexit fhci_remove(struct device *dev)
780 {
781 struct usb_hcd *hcd = dev_get_drvdata(dev);
782 struct fhci_hcd *fhci = hcd_to_fhci(hcd);
783 int i;
784 int j;
785
786 usb_remove_hcd(hcd);
787 free_irq(fhci->timer->irq, hcd);
788 gtm_put_timer16(fhci->timer);
789 cpm_muram_free(cpm_muram_offset(fhci->pram));
790 for (i = 0; i < NUM_GPIOS; i++) {
791 if (!gpio_is_valid(fhci->gpios[i]))
792 continue;
793 gpio_free(fhci->gpios[i]);
794 }
795 for (j = 0; j < NUM_PINS; j++)
796 qe_pin_free(fhci->pins[j]);
797 fhci_dfs_destroy(fhci);
798 usb_put_hcd(hcd);
799 return 0;
800 }
801
of_fhci_remove(struct of_device * ofdev)802 static int __devexit of_fhci_remove(struct of_device *ofdev)
803 {
804 return fhci_remove(&ofdev->dev);
805 }
806
807 static struct of_device_id of_fhci_match[] = {
808 { .compatible = "fsl,mpc8323-qe-usb", },
809 {},
810 };
811 MODULE_DEVICE_TABLE(of, of_fhci_match);
812
813 static struct of_platform_driver of_fhci_driver = {
814 .name = "fsl,usb-fhci",
815 .match_table = of_fhci_match,
816 .probe = of_fhci_probe,
817 .remove = __devexit_p(of_fhci_remove),
818 };
819
fhci_module_init(void)820 static int __init fhci_module_init(void)
821 {
822 return of_register_platform_driver(&of_fhci_driver);
823 }
824 module_init(fhci_module_init);
825
fhci_module_exit(void)826 static void __exit fhci_module_exit(void)
827 {
828 of_unregister_platform_driver(&of_fhci_driver);
829 }
830 module_exit(fhci_module_exit);
831
832 MODULE_DESCRIPTION("USB Freescale Host Controller Interface Driver");
833 MODULE_AUTHOR("Shlomi Gridish <gridish@freescale.com>, "
834 "Jerry Huang <Chang-Ming.Huang@freescale.com>, "
835 "Anton Vorontsov <avorontsov@ru.mvista.com>");
836 MODULE_LICENSE("GPL");
837