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");