linux/drivers/usb/host/fhci-hcd.c
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   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
  38void 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
  51void 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
  61u16 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 */
  67static 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 */
  84void 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 */
 104void 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 */
 120static 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 */
 134static 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 */
 152int 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
 171static 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
 195static 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;
 239err:
 240        fhci_mem_free(fhci);
 241        return -ENOMEM;
 242}
 243
 244/* destroy the fhci_usb structure */
 245static 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 */
 260static 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 */
 307static 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
 327static 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, hub_wq concurrently accesses the root
 364         * hub; drivers will be talking to enumerated devices.
 365         * (On restart paths, hub_wq 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, hub_wq
 369         * and device drivers may start it running.
 370         */
 371        fhci_usb_enable(fhci);
 372        return 0;
 373err:
 374        fhci_mem_free(fhci);
 375        return ret;
 376}
 377
 378static 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
 390static 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);
 460err:
 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 */
 470static 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
 506out2:
 507        spin_unlock_irqrestore(&fhci->lock, flags);
 508out:
 509        return ret;
 510}
 511
 512static 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
 533static 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
 540static 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
 566static 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
 763err_add_hcd:
 764err_clocks:
 765        irq_dispose_mapping(usb_irq);
 766err_usb_irq:
 767        free_irq(fhci->timer->irq, hcd);
 768err_timer_irq:
 769        gtm_put_timer16(fhci->timer);
 770err_get_timer:
 771err_pins:
 772        while (--j >= 0)
 773                qe_pin_free(fhci->pins[j]);
 774err_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);
 780err_pram:
 781        iounmap(hcd->regs);
 782err_regs:
 783        usb_put_hcd(hcd);
 784        return ret;
 785}
 786
 787static 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
 810static int of_fhci_remove(struct platform_device *ofdev)
 811{
 812        return fhci_remove(&ofdev->dev);
 813}
 814
 815static const struct of_device_id of_fhci_match[] = {
 816        { .compatible = "fsl,mpc8323-qe-usb", },
 817        {},
 818};
 819MODULE_DEVICE_TABLE(of, of_fhci_match);
 820
 821static struct platform_driver of_fhci_driver = {
 822        .driver = {
 823                .name = "fsl,usb-fhci",
 824                .of_match_table = of_fhci_match,
 825        },
 826        .probe          = of_fhci_probe,
 827        .remove         = of_fhci_remove,
 828};
 829
 830module_platform_driver(of_fhci_driver);
 831
 832MODULE_DESCRIPTION("USB Freescale Host Controller Interface Driver");
 833MODULE_AUTHOR("Shlomi Gridish <gridish@freescale.com>, "
 834              "Jerry Huang <Chang-Ming.Huang@freescale.com>, "
 835              "Anton Vorontsov <avorontsov@ru.mvista.com>");
 836MODULE_LICENSE("GPL");
 837