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/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
  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
  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
  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 */
  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 */
  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 */
 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 */
 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 */
 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 */
 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
 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
 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 */
 242 static void fhci_usb_free(void *lld)
 243 {
 244         struct fhci_usb *usb = lld;
 245         struct fhci_hcd *fhci;
 246
 247         if (usb) {
 248                 fhci = usb->fhci;
 249                 fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF);
 250                 fhci_ep0_free(usb);
 251                 kfree(usb->actual_frame);
 252                 kfree(usb);
 253         }
 254 }
 255
 256 /* initialize the USB */
 257 static int fhci_usb_init(struct fhci_hcd *fhci)
 258 {
 259         struct fhci_usb *usb = fhci->usb_lld;
 260
 261         memset_io(usb->fhci->pram, 0, FHCI_PRAM_SIZE);
 262
 263         usb->port_status = FHCI_PORT_DISABLED;
 264         usb->max_frame_usage = FRAME_TIME_USAGE;
 265         usb->sw_transaction_time = SW_FIX_TIME_BETWEEN_TRANSACTION;
 266
 267         usb->actual_frame = kzalloc(sizeof(*usb->actual_frame), GFP_KERNEL);
 268         if (!usb->actual_frame) {
 269                 fhci_usb_free(usb);
 270                 return -ENOMEM;
 271         }
 272
 273         INIT_LIST_HEAD(&usb->actual_frame->tds_list);
 274
 275         /* initializing registers on chip, clear frame number */
 276         out_be16(&fhci->pram->frame_num, 0);
 277
 278         /* clear rx state */
 279         out_be32(&fhci->pram->rx_state, 0);
 280
 281         /* set mask register */
 282         usb->saved_msk = (USB_E_TXB_MASK |
 283                           USB_E_TXE1_MASK |
 284                           USB_E_IDLE_MASK |
 285                           USB_E_RESET_MASK | USB_E_SFT_MASK | USB_E_MSF_MASK);
 286
 287         out_8(&usb->fhci->regs->usb_mod, USB_MODE_HOST | USB_MODE_EN);
 288
 289         /* clearing the mask register */
 290         out_be16(&usb->fhci->regs->usb_mask, 0);
 291
 292         /* initialing the event register */
 293         out_be16(&usb->fhci->regs->usb_event, 0xffff);
 294
 295         if (endpoint_zero_init(usb, DEFAULT_DATA_MEM, DEFAULT_RING_LEN) != 0) {
 296                 fhci_usb_free(usb);
 297                 return -EINVAL;
 298         }
 299
 300         return 0;
 301 }
 302
 303 /* initialize the fhci_usb struct and the corresponding data staruct */
 304 static struct fhci_usb *fhci_create_lld(struct fhci_hcd *fhci)
 305 {
 306         struct fhci_usb *usb;
 307
 308         /* allocate memory for SCC data structure */
 309         usb = kzalloc(sizeof(*usb), GFP_KERNEL);
 310         if (!usb) {
 311                 fhci_err(fhci, "no memory for SCC data struct\n");
 312                 return NULL;
 313         }
 314
 315         usb->fhci = fhci;
 316         usb->hc_list = fhci->hc_list;
 317         usb->vroot_hub = fhci->vroot_hub;
 318
 319         usb->transfer_confirm = fhci_transfer_confirm_callback;
 320
 321         return usb;
 322 }
 323
 324 static int fhci_start(struct usb_hcd *hcd)
 325 {
 326         int ret;
 327         struct fhci_hcd *fhci = hcd_to_fhci(hcd);
 328
 329         ret = fhci_mem_init(fhci);
 330         if (ret) {
 331                 fhci_err(fhci, "failed to allocate memory\n");
 332                 goto err;
 333         }
 334
 335         fhci->usb_lld = fhci_create_lld(fhci);
 336         if (!fhci->usb_lld) {
 337                 fhci_err(fhci, "low level driver config failed\n");
 338                 ret = -ENOMEM;
 339                 goto err;
 340         }
 341
 342         ret = fhci_usb_init(fhci);
 343         if (ret) {
 344                 fhci_err(fhci, "low level driver initialize failed\n");
 345                 goto err;
 346         }
 347
 348         spin_lock_init(&fhci->lock);
 349
 350         /* connect the virtual root hub */
 351         fhci->vroot_hub->dev_num = 1;   /* this field may be needed to fix */
 352         fhci->vroot_hub->hub.wHubStatus = 0;
 353         fhci->vroot_hub->hub.wHubChange = 0;
 354         fhci->vroot_hub->port.wPortStatus = 0;
 355         fhci->vroot_hub->port.wPortChange = 0;
 356
 357         hcd->state = HC_STATE_RUNNING;
 358
 359         /*
 360          * From here on, khubd concurrently accesses the root
 361          * hub; drivers will be talking to enumerated devices.
 362          * (On restart paths, khubd already knows about the root
 363          * hub and could find work as soon as we wrote FLAG_CF.)
 364          *
 365          * Before this point the HC was idle/ready.  After, khubd
 366          * and device drivers may start it running.
 367          */
 368         fhci_usb_enable(fhci);
 369         return 0;
 370 err:
 371         fhci_mem_free(fhci);
 372         return ret;
 373 }
 374
 375 static void fhci_stop(struct usb_hcd *hcd)
 376 {
 377         struct fhci_hcd *fhci = hcd_to_fhci(hcd);
 378
 379         fhci_usb_disable_interrupt(fhci->usb_lld);
 380         fhci_usb_disable(fhci);
 381
 382         fhci_usb_free(fhci->usb_lld);
 383         fhci->usb_lld = NULL;
 384         fhci_mem_free(fhci);
 385 }
 386
 387 static int fhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
 388                             gfp_t mem_flags)
 389 {
 390         struct fhci_hcd *fhci = hcd_to_fhci(hcd);
 391         u32 pipe = urb->pipe;
 392         int ret;
 393         int i;
 394         int size = 0;
 395         struct urb_priv *urb_priv;
 396         unsigned long flags;
 397
 398         switch (usb_pipetype(pipe)) {
 399         case PIPE_CONTROL:
 400                 /* 1 td fro setup,1 for ack */
 401                 size = 2;
 402         case PIPE_BULK:
 403                 /* one td for every 4096 bytes(can be upto 8k) */
 404                 size += urb->transfer_buffer_length / 4096;
 405                 /* ...add for any remaining bytes... */
 406                 if ((urb->transfer_buffer_length % 4096) != 0)
 407                         size++;
 408                 /* ..and maybe a zero length packet to wrap it up */
 409                 if (size == 0)
 410                         size++;
 411                 else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0
 412                          && (urb->transfer_buffer_length
 413                              % usb_maxpacket(urb->dev, pipe,
 414                                              usb_pipeout(pipe))) != 0)
 415                         size++;
 416                 break;
 417         case PIPE_ISOCHRONOUS:
 418                 size = urb->number_of_packets;
 419                 if (size <= 0)
 420                         return -EINVAL;
 421                 for (i = 0; i < urb->number_of_packets; i++) {
 422                         urb->iso_frame_desc[i].actual_length = 0;
 423                         urb->iso_frame_desc[i].status = (u32) (-EXDEV);
 424                 }
 425                 break;
 426         case PIPE_INTERRUPT:
 427                 size = 1;
 428         }
 429
 430         /* allocate the private part of the URB */
 431         urb_priv = kzalloc(sizeof(*urb_priv), mem_flags);
 432         if (!urb_priv)
 433                 return -ENOMEM;
 434
 435         /* allocate the private part of the URB */
 436         urb_priv->tds = kcalloc(size, sizeof(*urb_priv->tds), mem_flags);
 437         if (!urb_priv->tds) {
 438                 kfree(urb_priv);
 439                 return -ENOMEM;
 440         }
 441
 442         spin_lock_irqsave(&fhci->lock, flags);
 443
 444         ret = usb_hcd_link_urb_to_ep(hcd, urb);
 445         if (ret)
 446                 goto err;
 447
 448         /* fill the private part of the URB */
 449         urb_priv->num_of_tds = size;
 450
 451         urb->status = -EINPROGRESS;
 452         urb->actual_length = 0;
 453         urb->error_count = 0;
 454         urb->hcpriv = urb_priv;
 455
 456         fhci_queue_urb(fhci, urb);
 457 err:
 458         if (ret) {
 459                 kfree(urb_priv->tds);
 460                 kfree(urb_priv);
 461         }
 462         spin_unlock_irqrestore(&fhci->lock, flags);
 463         return ret;
 464 }
 465
 466 /* dequeue FHCI URB */
 467 static int fhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 468 {
 469         struct fhci_hcd *fhci = hcd_to_fhci(hcd);
 470         struct fhci_usb *usb = fhci->usb_lld;
 471         int ret = -EINVAL;
 472         unsigned long flags;
 473
 474         if (!urb || !urb->dev || !urb->dev->bus)
 475                 goto out;
 476
 477         spin_lock_irqsave(&fhci->lock, flags);
 478
 479         ret = usb_hcd_check_unlink_urb(hcd, urb, status);
 480         if (ret)
 481                 goto out2;
 482
 483         if (usb->port_status != FHCI_PORT_DISABLED) {
 484                 struct urb_priv *urb_priv;
 485
 486                 /*
 487                  * flag the urb's data for deletion in some upcoming
 488                  * SF interrupt's delete list processing
 489                  */
 490                 urb_priv = urb->hcpriv;
 491
 492                 if (!urb_priv || (urb_priv->state == URB_DEL))
 493                         goto out2;
 494
 495                 urb_priv->state = URB_DEL;
 496
 497                 /* already pending? */
 498                 urb_priv->ed->state = FHCI_ED_URB_DEL;
 499         } else {
 500                 fhci_urb_complete_free(fhci, urb);
 501         }
 502
 503 out2:
 504         spin_unlock_irqrestore(&fhci->lock, flags);
 505 out:
 506         return ret;
 507 }
 508
 509 static void fhci_endpoint_disable(struct usb_hcd *hcd,
 510                                   struct usb_host_endpoint *ep)
 511 {
 512         struct fhci_hcd *fhci;
 513         struct ed *ed;
 514         unsigned long flags;
 515
 516         fhci = hcd_to_fhci(hcd);
 517         spin_lock_irqsave(&fhci->lock, flags);
 518         ed = ep->hcpriv;
 519         if (ed) {
 520                 while (ed->td_head != NULL) {
 521                         struct td *td = fhci_remove_td_from_ed(ed);
 522                         fhci_urb_complete_free(fhci, td->urb);
 523                 }
 524                 fhci_recycle_empty_ed(fhci, ed);
 525                 ep->hcpriv = NULL;
 526         }
 527         spin_unlock_irqrestore(&fhci->lock, flags);
 528 }
 529
 530 static int fhci_get_frame_number(struct usb_hcd *hcd)
 531 {
 532         struct fhci_hcd *fhci = hcd_to_fhci(hcd);
 533
 534         return get_frame_num(fhci);
 535 }
 536
 537 static const struct hc_driver fhci_driver = {
 538         .description = "fsl,usb-fhci",
 539         .product_desc = "FHCI HOST Controller",
 540         .hcd_priv_size = sizeof(struct fhci_hcd),
 541
 542         /* generic hardware linkage */
 543         .irq = fhci_irq,
 544         .flags = HCD_USB11 | HCD_MEMORY,
 545
 546         /* basic lifecycle operation */
 547         .start = fhci_start,
 548         .stop = fhci_stop,
 549
 550         /* managing i/o requests and associated device resources */
 551         .urb_enqueue = fhci_urb_enqueue,
 552         .urb_dequeue = fhci_urb_dequeue,
 553         .endpoint_disable = fhci_endpoint_disable,
 554
 555         /* scheduling support */
 556         .get_frame_number = fhci_get_frame_number,
 557
 558         /* root hub support */
 559         .hub_status_data = fhci_hub_status_data,
 560         .hub_control = fhci_hub_control,
 561 };
 562
 563 static int __devinit of_fhci_probe(struct of_device *ofdev,
 564                                    const struct of_device_id *ofid)
 565 {
 566         struct device *dev = &ofdev->dev;
 567         struct device_node *node = ofdev->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, usb_regs.end - usb_regs.start + 1);
 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_fixed(iprop[2], FHCI_PRAM_SIZE);
 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         fhci->pram = cpm_muram_addr(pram_addr);
 631
 632         /* GPIOs and pins */
 633         for (i = 0; i < NUM_GPIOS; i++) {
 634                 int gpio;
 635                 enum of_gpio_flags flags;
 636
 637                 gpio = of_get_gpio_flags(node, i, &flags);
 638                 fhci->gpios[i] = gpio;
 639                 fhci->alow_gpios[i] = flags & OF_GPIO_ACTIVE_LOW;
 640
 641                 if (!gpio_is_valid(gpio)) {
 642                         if (i < GPIO_SPEED) {
 643                                 dev_err(dev, "incorrect GPIO%d: %d\n",
 644                                         i, gpio);
 645                                 goto err_gpios;
 646                         } else {
 647                                 dev_info(dev, "assuming board doesn't have "
 648                                         "%s gpio\n", i == GPIO_SPEED ?
 649                                         "speed" : "power");
 650                                 continue;
 651                         }
 652                 }
 653
 654                 ret = gpio_request(gpio, dev_name(dev));
 655                 if (ret) {
 656                         dev_err(dev, "failed to request gpio %d", i);
 657                         goto err_gpios;
 658                 }
 659
 660                 if (i >= GPIO_SPEED) {
 661                         ret = gpio_direction_output(gpio, 0);
 662                         if (ret) {
 663                                 dev_err(dev, "failed to set gpio %d as "
 664                                         "an output\n", i);
 665                                 i++;
 666                                 goto err_gpios;
 667                         }
 668                 }
 669         }
 670
 671         for (j = 0; j < NUM_PINS; j++) {
 672                 fhci->pins[j] = qe_pin_request(ofdev->node, j);
 673                 if (IS_ERR(fhci->pins[j])) {
 674                         ret = PTR_ERR(fhci->pins[j]);
 675                         dev_err(dev, "can't get pin %d: %d\n", j, ret);
 676                         goto err_pins;
 677                 }
 678         }
 679
 680         /* Frame limit timer and its interrupt. */
 681         fhci->timer = gtm_get_timer16();
 682         if (IS_ERR(fhci->timer)) {
 683                 ret = PTR_ERR(fhci->timer);
 684                 dev_err(dev, "failed to request qe timer: %i", ret);
 685                 goto err_get_timer;
 686         }
 687
 688         ret = request_irq(fhci->timer->irq, fhci_frame_limit_timer_irq,
 689                           IRQF_DISABLED, "qe timer (usb)", hcd);
 690         if (ret) {
 691                 dev_err(dev, "failed to request timer irq");
 692                 goto err_timer_irq;
 693         }
 694
 695         /* USB Host interrupt. */
 696         usb_irq = irq_of_parse_and_map(node, 0);
 697         if (usb_irq == NO_IRQ) {
 698                 dev_err(dev, "could not get usb irq\n");
 699                 ret = -EINVAL;
 700                 goto err_usb_irq;
 701         }
 702
 703         /* Clocks. */
 704         sprop = of_get_property(node, "fsl,fullspeed-clock", NULL);
 705         if (sprop) {
 706                 fhci->fullspeed_clk = qe_clock_source(sprop);
 707                 if (fhci->fullspeed_clk == QE_CLK_DUMMY) {
 708                         dev_err(dev, "wrong fullspeed-clock\n");
 709                         ret = -EINVAL;
 710                         goto err_clocks;
 711                 }
 712         }
 713
 714         sprop = of_get_property(node, "fsl,lowspeed-clock", NULL);
 715         if (sprop) {
 716                 fhci->lowspeed_clk = qe_clock_source(sprop);
 717                 if (fhci->lowspeed_clk == QE_CLK_DUMMY) {
 718                         dev_err(dev, "wrong lowspeed-clock\n");
 719                         ret = -EINVAL;
 720                         goto err_clocks;
 721                 }
 722         }
 723
 724         if (fhci->fullspeed_clk == QE_CLK_NONE &&
 725                         fhci->lowspeed_clk == QE_CLK_NONE) {
 726                 dev_err(dev, "no clocks specified\n");
 727                 ret = -EINVAL;
 728                 goto err_clocks;
 729         }
 730
 731         dev_info(dev, "at 0x%p, irq %d\n", hcd->regs, usb_irq);
 732
 733         fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF);
 734
 735         /* Start with full-speed, if possible. */
 736         if (fhci->fullspeed_clk != QE_CLK_NONE) {
 737                 fhci_config_transceiver(fhci, FHCI_PORT_FULL);
 738                 qe_usb_clock_set(fhci->fullspeed_clk, USB_CLOCK);
 739         } else {
 740                 fhci_config_transceiver(fhci, FHCI_PORT_LOW);
 741                 qe_usb_clock_set(fhci->lowspeed_clk, USB_CLOCK >> 3);
 742         }
 743
 744         /* Clear and disable any pending interrupts. */
 745         out_be16(&fhci->regs->usb_event, 0xffff);
 746         out_be16(&fhci->regs->usb_mask, 0);
 747
 748         ret = usb_add_hcd(hcd, usb_irq, IRQF_DISABLED);
 749         if (ret < 0)
 750                 goto err_add_hcd;
 751
 752         fhci_dfs_create(fhci);
 753
 754         return 0;
 755
 756 err_add_hcd:
 757 err_clocks:
 758         irq_dispose_mapping(usb_irq);
 759 err_usb_irq:
 760         free_irq(fhci->timer->irq, hcd);
 761 err_timer_irq:
 762         gtm_put_timer16(fhci->timer);
 763 err_get_timer:
 764 err_pins:
 765         while (--j >= 0)
 766                 qe_pin_free(fhci->pins[j]);
 767 err_gpios:
 768         while (--i >= 0) {
 769                 if (gpio_is_valid(fhci->gpios[i]))
 770                         gpio_free(fhci->gpios[i]);
 771         }
 772         cpm_muram_free(pram_addr);
 773 err_pram:
 774         iounmap(hcd->regs);
 775 err_regs:
 776         usb_put_hcd(hcd);
 777         return ret;
 778 }
 779
 780 static int __devexit fhci_remove(struct device *dev)
 781 {
 782         struct usb_hcd *hcd = dev_get_drvdata(dev);
 783         struct fhci_hcd *fhci = hcd_to_fhci(hcd);
 784         int i;
 785         int j;
 786
 787         usb_remove_hcd(hcd);
 788         free_irq(fhci->timer->irq, hcd);
 789         gtm_put_timer16(fhci->timer);
 790         cpm_muram_free(cpm_muram_offset(fhci->pram));
 791         for (i = 0; i < NUM_GPIOS; i++) {
 792                 if (!gpio_is_valid(fhci->gpios[i]))
 793                         continue;
 794                 gpio_free(fhci->gpios[i]);
 795         }
 796         for (j = 0; j < NUM_PINS; j++)
 797                 qe_pin_free(fhci->pins[j]);
 798         fhci_dfs_destroy(fhci);
 799         usb_put_hcd(hcd);
 800         return 0;
 801 }
 802
 803 static int __devexit of_fhci_remove(struct of_device *ofdev)
 804 {
 805         return fhci_remove(&ofdev->dev);
 806 }
 807
 808 static const struct of_device_id of_fhci_match[] = {
 809         { .compatible = "fsl,mpc8323-qe-usb", },
 810         {},
 811 };
 812 MODULE_DEVICE_TABLE(of, of_fhci_match);
 813
 814 static struct of_platform_driver of_fhci_driver = {
 815         .name           = "fsl,usb-fhci",
 816         .match_table    = of_fhci_match,
 817         .probe          = of_fhci_probe,
 818         .remove         = __devexit_p(of_fhci_remove),
 819 };
 820
 821 static int __init fhci_module_init(void)
 822 {
 823         return of_register_platform_driver(&of_fhci_driver);
 824 }
 825 module_init(fhci_module_init);
 826
 827 static void __exit fhci_module_exit(void)
 828 {
 829         of_unregister_platform_driver(&of_fhci_driver);
 830 }
 831 module_exit(fhci_module_exit);
 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");