Version:  2.0.40 2.2.26 2.4.37 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9

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 <soc/fsl/qe/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                 return NULL;
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 
325 static 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, hub_wq concurrently accesses the root
362          * hub; drivers will be talking to enumerated devices.
363          * (On restart paths, hub_wq 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, hub_wq
367          * and device drivers may start it running.
368          */
369         fhci_usb_enable(fhci);
370         return 0;
371 err:
372         fhci_mem_free(fhci);
373         return ret;
374 }
375 
376 static 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 
388 static 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);
458 err:
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 */
468 static 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 
504 out2:
505         spin_unlock_irqrestore(&fhci->lock, flags);
506 out:
507         return ret;
508 }
509 
510 static 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 
531 static 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 
538 static 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 
564 static int 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_usber, 0xffff);
749         out_be16(&fhci->regs->usb_usbmr, 0);
750 
751         ret = usb_add_hcd(hcd, usb_irq, 0);
752         if (ret < 0)
753                 goto err_add_hcd;
754 
755         device_wakeup_enable(hcd->self.controller);
756 
757         fhci_dfs_create(fhci);
758 
759         return 0;
760 
761 err_add_hcd:
762 err_clocks:
763         irq_dispose_mapping(usb_irq);
764 err_usb_irq:
765         free_irq(fhci->timer->irq, hcd);
766 err_timer_irq:
767         gtm_put_timer16(fhci->timer);
768 err_get_timer:
769 err_pins:
770         while (--j >= 0)
771                 qe_pin_free(fhci->pins[j]);
772 err_gpios:
773         while (--i >= 0) {
774                 if (gpio_is_valid(fhci->gpios[i]))
775                         gpio_free(fhci->gpios[i]);
776         }
777         cpm_muram_free(pram_addr);
778 err_pram:
779         iounmap(hcd->regs);
780 err_regs:
781         usb_put_hcd(hcd);
782         return ret;
783 }
784 
785 static int fhci_remove(struct device *dev)
786 {
787         struct usb_hcd *hcd = dev_get_drvdata(dev);
788         struct fhci_hcd *fhci = hcd_to_fhci(hcd);
789         int i;
790         int j;
791 
792         usb_remove_hcd(hcd);
793         free_irq(fhci->timer->irq, hcd);
794         gtm_put_timer16(fhci->timer);
795         cpm_muram_free(cpm_muram_offset(fhci->pram));
796         for (i = 0; i < NUM_GPIOS; i++) {
797                 if (!gpio_is_valid(fhci->gpios[i]))
798                         continue;
799                 gpio_free(fhci->gpios[i]);
800         }
801         for (j = 0; j < NUM_PINS; j++)
802                 qe_pin_free(fhci->pins[j]);
803         fhci_dfs_destroy(fhci);
804         usb_put_hcd(hcd);
805         return 0;
806 }
807 
808 static int of_fhci_remove(struct platform_device *ofdev)
809 {
810         return fhci_remove(&ofdev->dev);
811 }
812 
813 static const struct of_device_id of_fhci_match[] = {
814         { .compatible = "fsl,mpc8323-qe-usb", },
815         {},
816 };
817 MODULE_DEVICE_TABLE(of, of_fhci_match);
818 
819 static struct platform_driver of_fhci_driver = {
820         .driver = {
821                 .name = "fsl,usb-fhci",
822                 .of_match_table = of_fhci_match,
823         },
824         .probe          = of_fhci_probe,
825         .remove         = of_fhci_remove,
826 };
827 
828 module_platform_driver(of_fhci_driver);
829 
830 MODULE_DESCRIPTION("USB Freescale Host Controller Interface Driver");
831 MODULE_AUTHOR("Shlomi Gridish <gridish@freescale.com>, "
832               "Jerry Huang <Chang-Ming.Huang@freescale.com>, "
833               "Anton Vorontsov <avorontsov@ru.mvista.com>");
834 MODULE_LICENSE("GPL");
835 

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