Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15

Linux/drivers/usb/host/fhci-hcd.c

  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_address.h>
 30 #include <linux/of_irq.h>
 31 #include <linux/of_platform.h>
 32 #include <linux/of_gpio.h>
 33 #include <linux/slab.h>
 34 #include <asm/qe.h>
 35 #include <asm/fsl_gtm.h>
 36 #include "fhci.h"
 37 
 38 void fhci_start_sof_timer(struct fhci_hcd *fhci)
 39 {
 40         fhci_dbg(fhci, "-> %s\n", __func__);
 41 
 42         /* clear frame_n */
 43         out_be16(&fhci->pram->frame_num, 0);
 44 
 45         out_be16(&fhci->regs->usb_ussft, 0);
 46         setbits8(&fhci->regs->usb_usmod, USB_MODE_SFTE);
 47 
 48         fhci_dbg(fhci, "<- %s\n", __func__);
 49 }
 50 
 51 void fhci_stop_sof_timer(struct fhci_hcd *fhci)
 52 {
 53         fhci_dbg(fhci, "-> %s\n", __func__);
 54 
 55         clrbits8(&fhci->regs->usb_usmod, USB_MODE_SFTE);
 56         gtm_stop_timer16(fhci->timer);
 57 
 58         fhci_dbg(fhci, "<- %s\n", __func__);
 59 }
 60 
 61 u16 fhci_get_sof_timer_count(struct fhci_usb *usb)
 62 {
 63         return be16_to_cpu(in_be16(&usb->fhci->regs->usb_ussft) / 12);
 64 }
 65 
 66 /* initialize the endpoint zero */
 67 static u32 endpoint_zero_init(struct fhci_usb *usb,
 68                               enum fhci_mem_alloc data_mem,
 69                               u32 ring_len)
 70 {
 71         u32 rc;
 72 
 73         rc = fhci_create_ep(usb, data_mem, ring_len);
 74         if (rc)
 75                 return rc;
 76 
 77         /* inilialize endpoint registers */
 78         fhci_init_ep_registers(usb, usb->ep0, data_mem);
 79 
 80         return 0;
 81 }
 82 
 83 /* enable the USB interrupts */
 84 void fhci_usb_enable_interrupt(struct fhci_usb *usb)
 85 {
 86         struct fhci_hcd *fhci = usb->fhci;
 87 
 88         if (usb->intr_nesting_cnt == 1) {
 89                 /* initialize the USB interrupt */
 90                 enable_irq(fhci_to_hcd(fhci)->irq);
 91 
 92                 /* initialize the event register and mask register */
 93                 out_be16(&usb->fhci->regs->usb_usber, 0xffff);
 94                 out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk);
 95 
 96                 /* enable the timer interrupts */
 97                 enable_irq(fhci->timer->irq);
 98         } else if (usb->intr_nesting_cnt > 1)
 99                 fhci_info(fhci, "unbalanced USB interrupts nesting\n");
100         usb->intr_nesting_cnt--;
101 }
102 
103 /* disable the usb interrupt */
104 void fhci_usb_disable_interrupt(struct fhci_usb *usb)
105 {
106         struct fhci_hcd *fhci = usb->fhci;
107 
108         if (usb->intr_nesting_cnt == 0) {
109                 /* disable the timer interrupt */
110                 disable_irq_nosync(fhci->timer->irq);
111 
112                 /* disable the usb interrupt */
113                 disable_irq_nosync(fhci_to_hcd(fhci)->irq);
114                 out_be16(&usb->fhci->regs->usb_usbmr, 0);
115         }
116         usb->intr_nesting_cnt++;
117 }
118 
119 /* enable the USB controller */
120 static u32 fhci_usb_enable(struct fhci_hcd *fhci)
121 {
122         struct fhci_usb *usb = fhci->usb_lld;
123 
124         out_be16(&usb->fhci->regs->usb_usber, 0xffff);
125         out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk);
126         setbits8(&usb->fhci->regs->usb_usmod, USB_MODE_EN);
127 
128         mdelay(100);
129 
130         return 0;
131 }
132 
133 /* disable the USB controller */
134 static u32 fhci_usb_disable(struct fhci_hcd *fhci)
135 {
136         struct fhci_usb *usb = fhci->usb_lld;
137 
138         fhci_usb_disable_interrupt(usb);
139         fhci_port_disable(fhci);
140 
141         /* disable the usb controller */
142         if (usb->port_status == FHCI_PORT_FULL ||
143                         usb->port_status == FHCI_PORT_LOW)
144                 fhci_device_disconnected_interrupt(fhci);
145 
146         clrbits8(&usb->fhci->regs->usb_usmod, USB_MODE_EN);
147 
148         return 0;
149 }
150 
151 /* check the bus state by polling the QE bit on the IO ports */
152 int fhci_ioports_check_bus_state(struct fhci_hcd *fhci)
153 {
154         u8 bits = 0;
155 
156         /* check USBOE,if transmitting,exit */
157         if (!gpio_get_value(fhci->gpios[GPIO_USBOE]))
158                 return -1;
159 
160         /* check USBRP */
161         if (gpio_get_value(fhci->gpios[GPIO_USBRP]))
162                 bits |= 0x2;
163 
164         /* check USBRN */
165         if (gpio_get_value(fhci->gpios[GPIO_USBRN]))
166                 bits |= 0x1;
167 
168         return bits;
169 }
170 
171 static void fhci_mem_free(struct fhci_hcd *fhci)
172 {
173         struct ed *ed;
174         struct ed *next_ed;
175         struct td *td;
176         struct td *next_td;
177 
178         list_for_each_entry_safe(ed, next_ed, &fhci->empty_eds, node) {
179                 list_del(&ed->node);
180                 kfree(ed);
181         }
182 
183         list_for_each_entry_safe(td, next_td, &fhci->empty_tds, node) {
184                 list_del(&td->node);
185                 kfree(td);
186         }
187 
188         kfree(fhci->vroot_hub);
189         fhci->vroot_hub = NULL;
190 
191         kfree(fhci->hc_list);
192         fhci->hc_list = NULL;
193 }
194 
195 static int fhci_mem_init(struct fhci_hcd *fhci)
196 {
197         int i;
198 
199         fhci->hc_list = kzalloc(sizeof(*fhci->hc_list), GFP_KERNEL);
200         if (!fhci->hc_list)
201                 goto err;
202 
203         INIT_LIST_HEAD(&fhci->hc_list->ctrl_list);
204         INIT_LIST_HEAD(&fhci->hc_list->bulk_list);
205         INIT_LIST_HEAD(&fhci->hc_list->iso_list);
206         INIT_LIST_HEAD(&fhci->hc_list->intr_list);
207         INIT_LIST_HEAD(&fhci->hc_list->done_list);
208 
209         fhci->vroot_hub = kzalloc(sizeof(*fhci->vroot_hub), GFP_KERNEL);
210         if (!fhci->vroot_hub)
211                 goto err;
212 
213         INIT_LIST_HEAD(&fhci->empty_eds);
214         INIT_LIST_HEAD(&fhci->empty_tds);
215 
216         /* initialize work queue to handle done list */
217         fhci_tasklet.data = (unsigned long)fhci;
218         fhci->process_done_task = &fhci_tasklet;
219 
220         for (i = 0; i < MAX_TDS; i++) {
221                 struct td *td;
222 
223                 td = kmalloc(sizeof(*td), GFP_KERNEL);
224                 if (!td)
225                         goto err;
226                 fhci_recycle_empty_td(fhci, td);
227         }
228         for (i = 0; i < MAX_EDS; i++) {
229                 struct ed *ed;
230 
231                 ed = kmalloc(sizeof(*ed), GFP_KERNEL);
232                 if (!ed)
233                         goto err;
234                 fhci_recycle_empty_ed(fhci, ed);
235         }
236 
237         fhci->active_urbs = 0;
238         return 0;
239 err:
240         fhci_mem_free(fhci);
241         return -ENOMEM;
242 }
243 
244 /* destroy the fhci_usb structure */
245 static void fhci_usb_free(void *lld)
246 {
247         struct fhci_usb *usb = lld;
248         struct fhci_hcd *fhci;
249 
250         if (usb) {
251                 fhci = usb->fhci;
252                 fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF);
253                 fhci_ep0_free(usb);
254                 kfree(usb->actual_frame);
255                 kfree(usb);
256         }
257 }
258 
259 /* initialize the USB */
260 static int fhci_usb_init(struct fhci_hcd *fhci)
261 {
262         struct fhci_usb *usb = fhci->usb_lld;
263 
264         memset_io(usb->fhci->pram, 0, FHCI_PRAM_SIZE);
265 
266         usb->port_status = FHCI_PORT_DISABLED;
267         usb->max_frame_usage = FRAME_TIME_USAGE;
268         usb->sw_transaction_time = SW_FIX_TIME_BETWEEN_TRANSACTION;
269 
270         usb->actual_frame = kzalloc(sizeof(*usb->actual_frame), GFP_KERNEL);
271         if (!usb->actual_frame) {
272                 fhci_usb_free(usb);
273                 return -ENOMEM;
274         }
275 
276         INIT_LIST_HEAD(&usb->actual_frame->tds_list);
277 
278         /* initializing registers on chip, clear frame number */
279         out_be16(&fhci->pram->frame_num, 0);
280 
281         /* clear rx state */
282         out_be32(&fhci->pram->rx_state, 0);
283 
284         /* set mask register */
285         usb->saved_msk = (USB_E_TXB_MASK |
286                           USB_E_TXE1_MASK |
287                           USB_E_IDLE_MASK |
288                           USB_E_RESET_MASK | USB_E_SFT_MASK | USB_E_MSF_MASK);
289 
290         out_8(&usb->fhci->regs->usb_usmod, USB_MODE_HOST | USB_MODE_EN);
291 
292         /* clearing the mask register */
293         out_be16(&usb->fhci->regs->usb_usbmr, 0);
294 
295         /* initialing the event register */
296         out_be16(&usb->fhci->regs->usb_usber, 0xffff);
297 
298         if (endpoint_zero_init(usb, DEFAULT_DATA_MEM, DEFAULT_RING_LEN) != 0) {
299                 fhci_usb_free(usb);
300                 return -EINVAL;
301         }
302 
303         return 0;
304 }
305 
306 /* initialize the fhci_usb struct and the corresponding data staruct */
307 static struct fhci_usb *fhci_create_lld(struct fhci_hcd *fhci)
308 {
309         struct fhci_usb *usb;
310 
311         /* allocate memory for SCC data structure */
312         usb = kzalloc(sizeof(*usb), GFP_KERNEL);
313         if (!usb) {
314                 fhci_err(fhci, "no memory for SCC data struct\n");
315                 return NULL;
316         }
317 
318         usb->fhci = fhci;
319         usb->hc_list = fhci->hc_list;
320         usb->vroot_hub = fhci->vroot_hub;
321 
322         usb->transfer_confirm = fhci_transfer_confirm_callback;
323 
324         return usb;
325 }
326 
327 static int fhci_start(struct usb_hcd *hcd)
328 {
329         int ret;
330         struct fhci_hcd *fhci = hcd_to_fhci(hcd);
331 
332         ret = fhci_mem_init(fhci);
333         if (ret) {
334                 fhci_err(fhci, "failed to allocate memory\n");
335                 goto err;
336         }
337 
338         fhci->usb_lld = fhci_create_lld(fhci);
339         if (!fhci->usb_lld) {
340                 fhci_err(fhci, "low level driver config failed\n");
341                 ret = -ENOMEM;
342                 goto err;
343         }
344 
345         ret = fhci_usb_init(fhci);
346         if (ret) {
347                 fhci_err(fhci, "low level driver initialize failed\n");
348                 goto err;
349         }
350 
351         spin_lock_init(&fhci->lock);
352 
353         /* connect the virtual root hub */
354         fhci->vroot_hub->dev_num = 1;   /* this field may be needed to fix */
355         fhci->vroot_hub->hub.wHubStatus = 0;
356         fhci->vroot_hub->hub.wHubChange = 0;
357         fhci->vroot_hub->port.wPortStatus = 0;
358         fhci->vroot_hub->port.wPortChange = 0;
359 
360         hcd->state = HC_STATE_RUNNING;
361 
362         /*
363          * From here on, khubd concurrently accesses the root
364          * hub; drivers will be talking to enumerated devices.
365          * (On restart paths, khubd already knows about the root
366          * hub and could find work as soon as we wrote FLAG_CF.)
367          *
368          * Before this point the HC was idle/ready.  After, khubd
369          * and device drivers may start it running.
370          */
371         fhci_usb_enable(fhci);
372         return 0;
373 err:
374         fhci_mem_free(fhci);
375         return ret;
376 }
377 
378 static void fhci_stop(struct usb_hcd *hcd)
379 {
380         struct fhci_hcd *fhci = hcd_to_fhci(hcd);
381 
382         fhci_usb_disable_interrupt(fhci->usb_lld);
383         fhci_usb_disable(fhci);
384 
385         fhci_usb_free(fhci->usb_lld);
386         fhci->usb_lld = NULL;
387         fhci_mem_free(fhci);
388 }
389 
390 static int fhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
391                             gfp_t mem_flags)
392 {
393         struct fhci_hcd *fhci = hcd_to_fhci(hcd);
394         u32 pipe = urb->pipe;
395         int ret;
396         int i;
397         int size = 0;
398         struct urb_priv *urb_priv;
399         unsigned long flags;
400 
401         switch (usb_pipetype(pipe)) {
402         case PIPE_CONTROL:
403                 /* 1 td fro setup,1 for ack */
404                 size = 2;
405         case PIPE_BULK:
406                 /* one td for every 4096 bytes(can be up to 8k) */
407                 size += urb->transfer_buffer_length / 4096;
408                 /* ...add for any remaining bytes... */
409                 if ((urb->transfer_buffer_length % 4096) != 0)
410                         size++;
411                 /* ..and maybe a zero length packet to wrap it up */
412                 if (size == 0)
413                         size++;
414                 else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0
415                          && (urb->transfer_buffer_length
416                              % usb_maxpacket(urb->dev, pipe,
417                                              usb_pipeout(pipe))) != 0)
418                         size++;
419                 break;
420         case PIPE_ISOCHRONOUS:
421                 size = urb->number_of_packets;
422                 if (size <= 0)
423                         return -EINVAL;
424                 for (i = 0; i < urb->number_of_packets; i++) {
425                         urb->iso_frame_desc[i].actual_length = 0;
426                         urb->iso_frame_desc[i].status = (u32) (-EXDEV);
427                 }
428                 break;
429         case PIPE_INTERRUPT:
430                 size = 1;
431         }
432 
433         /* allocate the private part of the URB */
434         urb_priv = kzalloc(sizeof(*urb_priv), mem_flags);
435         if (!urb_priv)
436                 return -ENOMEM;
437 
438         /* allocate the private part of the URB */
439         urb_priv->tds = kcalloc(size, sizeof(*urb_priv->tds), mem_flags);
440         if (!urb_priv->tds) {
441                 kfree(urb_priv);
442                 return -ENOMEM;
443         }
444 
445         spin_lock_irqsave(&fhci->lock, flags);
446 
447         ret = usb_hcd_link_urb_to_ep(hcd, urb);
448         if (ret)
449                 goto err;
450 
451         /* fill the private part of the URB */
452         urb_priv->num_of_tds = size;
453 
454         urb->status = -EINPROGRESS;
455         urb->actual_length = 0;
456         urb->error_count = 0;
457         urb->hcpriv = urb_priv;
458 
459         fhci_queue_urb(fhci, urb);
460 err:
461         if (ret) {
462                 kfree(urb_priv->tds);
463                 kfree(urb_priv);
464         }
465         spin_unlock_irqrestore(&fhci->lock, flags);
466         return ret;
467 }
468 
469 /* dequeue FHCI URB */
470 static int fhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
471 {
472         struct fhci_hcd *fhci = hcd_to_fhci(hcd);
473         struct fhci_usb *usb = fhci->usb_lld;
474         int ret = -EINVAL;
475         unsigned long flags;
476 
477         if (!urb || !urb->dev || !urb->dev->bus)
478                 goto out;
479 
480         spin_lock_irqsave(&fhci->lock, flags);
481 
482         ret = usb_hcd_check_unlink_urb(hcd, urb, status);
483         if (ret)
484                 goto out2;
485 
486         if (usb->port_status != FHCI_PORT_DISABLED) {
487                 struct urb_priv *urb_priv;
488 
489                 /*
490                  * flag the urb's data for deletion in some upcoming
491                  * SF interrupt's delete list processing
492                  */
493                 urb_priv = urb->hcpriv;
494 
495                 if (!urb_priv || (urb_priv->state == URB_DEL))
496                         goto out2;
497 
498                 urb_priv->state = URB_DEL;
499 
500                 /* already pending? */
501                 urb_priv->ed->state = FHCI_ED_URB_DEL;
502         } else {
503                 fhci_urb_complete_free(fhci, urb);
504         }
505 
506 out2:
507         spin_unlock_irqrestore(&fhci->lock, flags);
508 out:
509         return ret;
510 }
511 
512 static void fhci_endpoint_disable(struct usb_hcd *hcd,
513                                   struct usb_host_endpoint *ep)
514 {
515         struct fhci_hcd *fhci;
516         struct ed *ed;
517         unsigned long flags;
518 
519         fhci = hcd_to_fhci(hcd);
520         spin_lock_irqsave(&fhci->lock, flags);
521         ed = ep->hcpriv;
522         if (ed) {
523                 while (ed->td_head != NULL) {
524                         struct td *td = fhci_remove_td_from_ed(ed);
525                         fhci_urb_complete_free(fhci, td->urb);
526                 }
527                 fhci_recycle_empty_ed(fhci, ed);
528                 ep->hcpriv = NULL;
529         }
530         spin_unlock_irqrestore(&fhci->lock, flags);
531 }
532 
533 static int fhci_get_frame_number(struct usb_hcd *hcd)
534 {
535         struct fhci_hcd *fhci = hcd_to_fhci(hcd);
536 
537         return get_frame_num(fhci);
538 }
539 
540 static const struct hc_driver fhci_driver = {
541         .description = "fsl,usb-fhci",
542         .product_desc = "FHCI HOST Controller",
543         .hcd_priv_size = sizeof(struct fhci_hcd),
544 
545         /* generic hardware linkage */
546         .irq = fhci_irq,
547         .flags = HCD_USB11 | HCD_MEMORY,
548 
549         /* basic lifecycle operation */
550         .start = fhci_start,
551         .stop = fhci_stop,
552 
553         /* managing i/o requests and associated device resources */
554         .urb_enqueue = fhci_urb_enqueue,
555         .urb_dequeue = fhci_urb_dequeue,
556         .endpoint_disable = fhci_endpoint_disable,
557 
558         /* scheduling support */
559         .get_frame_number = fhci_get_frame_number,
560 
561         /* root hub support */
562         .hub_status_data = fhci_hub_status_data,
563         .hub_control = fhci_hub_control,
564 };
565 
566 static int of_fhci_probe(struct platform_device *ofdev)
567 {
568         struct device *dev = &ofdev->dev;
569         struct device_node *node = dev->of_node;
570         struct usb_hcd *hcd;
571         struct fhci_hcd *fhci;
572         struct resource usb_regs;
573         unsigned long pram_addr;
574         unsigned int usb_irq;
575         const char *sprop;
576         const u32 *iprop;
577         int size;
578         int ret;
579         int i;
580         int j;
581 
582         if (usb_disabled())
583                 return -ENODEV;
584 
585         sprop = of_get_property(node, "mode", NULL);
586         if (sprop && strcmp(sprop, "host"))
587                 return -ENODEV;
588 
589         hcd = usb_create_hcd(&fhci_driver, dev, dev_name(dev));
590         if (!hcd) {
591                 dev_err(dev, "could not create hcd\n");
592                 return -ENOMEM;
593         }
594 
595         fhci = hcd_to_fhci(hcd);
596         hcd->self.controller = dev;
597         dev_set_drvdata(dev, hcd);
598 
599         iprop = of_get_property(node, "hub-power-budget", &size);
600         if (iprop && size == sizeof(*iprop))
601                 hcd->power_budget = *iprop;
602 
603         /* FHCI registers. */
604         ret = of_address_to_resource(node, 0, &usb_regs);
605         if (ret) {
606                 dev_err(dev, "could not get regs\n");
607                 goto err_regs;
608         }
609 
610         hcd->regs = ioremap(usb_regs.start, resource_size(&usb_regs));
611         if (!hcd->regs) {
612                 dev_err(dev, "could not ioremap regs\n");
613                 ret = -ENOMEM;
614                 goto err_regs;
615         }
616         fhci->regs = hcd->regs;
617 
618         /* Parameter RAM. */
619         iprop = of_get_property(node, "reg", &size);
620         if (!iprop || size < sizeof(*iprop) * 4) {
621                 dev_err(dev, "can't get pram offset\n");
622                 ret = -EINVAL;
623                 goto err_pram;
624         }
625 
626         pram_addr = cpm_muram_alloc(FHCI_PRAM_SIZE, 64);
627         if (IS_ERR_VALUE(pram_addr)) {
628                 dev_err(dev, "failed to allocate usb pram\n");
629                 ret = -ENOMEM;
630                 goto err_pram;
631         }
632 
633         qe_issue_cmd(QE_ASSIGN_PAGE_TO_DEVICE, QE_CR_SUBBLOCK_USB,
634                      QE_CR_PROTOCOL_UNSPECIFIED, pram_addr);
635         fhci->pram = cpm_muram_addr(pram_addr);
636 
637         /* GPIOs and pins */
638         for (i = 0; i < NUM_GPIOS; i++) {
639                 int gpio;
640                 enum of_gpio_flags flags;
641 
642                 gpio = of_get_gpio_flags(node, i, &flags);
643                 fhci->gpios[i] = gpio;
644                 fhci->alow_gpios[i] = flags & OF_GPIO_ACTIVE_LOW;
645 
646                 if (!gpio_is_valid(gpio)) {
647                         if (i < GPIO_SPEED) {
648                                 dev_err(dev, "incorrect GPIO%d: %d\n",
649                                         i, gpio);
650                                 goto err_gpios;
651                         } else {
652                                 dev_info(dev, "assuming board doesn't have "
653                                         "%s gpio\n", i == GPIO_SPEED ?
654                                         "speed" : "power");
655                                 continue;
656                         }
657                 }
658 
659                 ret = gpio_request(gpio, dev_name(dev));
660                 if (ret) {
661                         dev_err(dev, "failed to request gpio %d", i);
662                         goto err_gpios;
663                 }
664 
665                 if (i >= GPIO_SPEED) {
666                         ret = gpio_direction_output(gpio, 0);
667                         if (ret) {
668                                 dev_err(dev, "failed to set gpio %d as "
669                                         "an output\n", i);
670                                 i++;
671                                 goto err_gpios;
672                         }
673                 }
674         }
675 
676         for (j = 0; j < NUM_PINS; j++) {
677                 fhci->pins[j] = qe_pin_request(node, j);
678                 if (IS_ERR(fhci->pins[j])) {
679                         ret = PTR_ERR(fhci->pins[j]);
680                         dev_err(dev, "can't get pin %d: %d\n", j, ret);
681                         goto err_pins;
682                 }
683         }
684 
685         /* Frame limit timer and its interrupt. */
686         fhci->timer = gtm_get_timer16();
687         if (IS_ERR(fhci->timer)) {
688                 ret = PTR_ERR(fhci->timer);
689                 dev_err(dev, "failed to request qe timer: %i", ret);
690                 goto err_get_timer;
691         }
692 
693         ret = request_irq(fhci->timer->irq, fhci_frame_limit_timer_irq,
694                           0, "qe timer (usb)", hcd);
695         if (ret) {
696                 dev_err(dev, "failed to request timer irq");
697                 goto err_timer_irq;
698         }
699 
700         /* USB Host interrupt. */
701         usb_irq = irq_of_parse_and_map(node, 0);
702         if (usb_irq == NO_IRQ) {
703                 dev_err(dev, "could not get usb irq\n");
704                 ret = -EINVAL;
705                 goto err_usb_irq;
706         }
707 
708         /* Clocks. */
709         sprop = of_get_property(node, "fsl,fullspeed-clock", NULL);
710         if (sprop) {
711                 fhci->fullspeed_clk = qe_clock_source(sprop);
712                 if (fhci->fullspeed_clk == QE_CLK_DUMMY) {
713                         dev_err(dev, "wrong fullspeed-clock\n");
714                         ret = -EINVAL;
715                         goto err_clocks;
716                 }
717         }
718 
719         sprop = of_get_property(node, "fsl,lowspeed-clock", NULL);
720         if (sprop) {
721                 fhci->lowspeed_clk = qe_clock_source(sprop);
722                 if (fhci->lowspeed_clk == QE_CLK_DUMMY) {
723                         dev_err(dev, "wrong lowspeed-clock\n");
724                         ret = -EINVAL;
725                         goto err_clocks;
726                 }
727         }
728 
729         if (fhci->fullspeed_clk == QE_CLK_NONE &&
730                         fhci->lowspeed_clk == QE_CLK_NONE) {
731                 dev_err(dev, "no clocks specified\n");
732                 ret = -EINVAL;
733                 goto err_clocks;
734         }
735 
736         dev_info(dev, "at 0x%p, irq %d\n", hcd->regs, usb_irq);
737 
738         fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF);
739 
740         /* Start with full-speed, if possible. */
741         if (fhci->fullspeed_clk != QE_CLK_NONE) {
742                 fhci_config_transceiver(fhci, FHCI_PORT_FULL);
743                 qe_usb_clock_set(fhci->fullspeed_clk, USB_CLOCK);
744         } else {
745                 fhci_config_transceiver(fhci, FHCI_PORT_LOW);
746                 qe_usb_clock_set(fhci->lowspeed_clk, USB_CLOCK >> 3);
747         }
748 
749         /* Clear and disable any pending interrupts. */
750         out_be16(&fhci->regs->usb_usber, 0xffff);
751         out_be16(&fhci->regs->usb_usbmr, 0);
752 
753         ret = usb_add_hcd(hcd, usb_irq, 0);
754         if (ret < 0)
755                 goto err_add_hcd;
756 
757         device_wakeup_enable(hcd->self.controller);
758 
759         fhci_dfs_create(fhci);
760 
761         return 0;
762 
763 err_add_hcd:
764 err_clocks:
765         irq_dispose_mapping(usb_irq);
766 err_usb_irq:
767         free_irq(fhci->timer->irq, hcd);
768 err_timer_irq:
769         gtm_put_timer16(fhci->timer);
770 err_get_timer:
771 err_pins:
772         while (--j >= 0)
773                 qe_pin_free(fhci->pins[j]);
774 err_gpios:
775         while (--i >= 0) {
776                 if (gpio_is_valid(fhci->gpios[i]))
777                         gpio_free(fhci->gpios[i]);
778         }
779         cpm_muram_free(pram_addr);
780 err_pram:
781         iounmap(hcd->regs);
782 err_regs:
783         usb_put_hcd(hcd);
784         return ret;
785 }
786 
787 static int fhci_remove(struct device *dev)
788 {
789         struct usb_hcd *hcd = dev_get_drvdata(dev);
790         struct fhci_hcd *fhci = hcd_to_fhci(hcd);
791         int i;
792         int j;
793 
794         usb_remove_hcd(hcd);
795         free_irq(fhci->timer->irq, hcd);
796         gtm_put_timer16(fhci->timer);
797         cpm_muram_free(cpm_muram_offset(fhci->pram));
798         for (i = 0; i < NUM_GPIOS; i++) {
799                 if (!gpio_is_valid(fhci->gpios[i]))
800                         continue;
801                 gpio_free(fhci->gpios[i]);
802         }
803         for (j = 0; j < NUM_PINS; j++)
804                 qe_pin_free(fhci->pins[j]);
805         fhci_dfs_destroy(fhci);
806         usb_put_hcd(hcd);
807         return 0;
808 }
809 
810 static int of_fhci_remove(struct platform_device *ofdev)
811 {
812         return fhci_remove(&ofdev->dev);
813 }
814 
815 static const struct of_device_id of_fhci_match[] = {
816         { .compatible = "fsl,mpc8323-qe-usb", },
817         {},
818 };
819 MODULE_DEVICE_TABLE(of, of_fhci_match);
820 
821 static struct platform_driver of_fhci_driver = {
822         .driver = {
823                 .name = "fsl,usb-fhci",
824                 .owner = THIS_MODULE,
825                 .of_match_table = of_fhci_match,
826         },
827         .probe          = of_fhci_probe,
828         .remove         = of_fhci_remove,
829 };
830 
831 module_platform_driver(of_fhci_driver);
832 
833 MODULE_DESCRIPTION("USB Freescale Host Controller Interface Driver");
834 MODULE_AUTHOR("Shlomi Gridish <gridish@freescale.com>, "
835               "Jerry Huang <Chang-Ming.Huang@freescale.com>, "
836               "Anton Vorontsov <avorontsov@ru.mvista.com>");
837 MODULE_LICENSE("GPL");
838 

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