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 = usb->fhci;
 246
 247         if (usb) {
 248                 fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF);
 249                 fhci_ep0_free(usb);
 250                 kfree(usb->actual_frame);
 251                 kfree(usb);
 252         }
 253 }
 254
 255 /* initialize the USB */
 256 static int fhci_usb_init(struct fhci_hcd *fhci)
 257 {
 258         struct fhci_usb *usb = fhci->usb_lld;
 259
 260         memset_io(usb->fhci->pram, 0, FHCI_PRAM_SIZE);
 261
 262         usb->port_status = FHCI_PORT_DISABLED;
 263         usb->max_frame_usage = FRAME_TIME_USAGE;
 264         usb->sw_transaction_time = SW_FIX_TIME_BETWEEN_TRANSACTION;
 265
 266         usb->actual_frame = kzalloc(sizeof(*usb->actual_frame), GFP_KERNEL);
 267         if (!usb->actual_frame) {
 268                 fhci_usb_free(usb);
 269                 return -ENOMEM;
 270         }
 271
 272         INIT_LIST_HEAD(&usb->actual_frame->tds_list);
 273
 274         /* initializing registers on chip, clear frame number */
 275         out_be16(&fhci->pram->frame_num, 0);
 276
 277         /* clear rx state */
 278         out_be32(&fhci->pram->rx_state, 0);
 279
 280         /* set mask register */
 281         usb->saved_msk = (USB_E_TXB_MASK |
 282                           USB_E_TXE1_MASK |
 283                           USB_E_IDLE_MASK |
 284                           USB_E_RESET_MASK | USB_E_SFT_MASK | USB_E_MSF_MASK);
 285
 286         out_8(&usb->fhci->regs->usb_mod, USB_MODE_HOST | USB_MODE_EN);
 287
 288         /* clearing the mask register */
 289         out_be16(&usb->fhci->regs->usb_mask, 0);
 290
 291         /* initialing the event register */
 292         out_be16(&usb->fhci->regs->usb_event, 0xffff);
 293
 294         if (endpoint_zero_init(usb, DEFAULT_DATA_MEM, DEFAULT_RING_LEN) != 0) {
 295                 fhci_usb_free(usb);
 296                 return -EINVAL;
 297         }
 298
 299         return 0;
 300 }
 301
 302 /* initialize the fhci_usb struct and the corresponding data staruct */
 303 static struct fhci_usb *fhci_create_lld(struct fhci_hcd *fhci)
 304 {
 305         struct fhci_usb *usb;
 306
 307         /* allocate memory for SCC data structure */
 308         usb = kzalloc(sizeof(*usb), GFP_KERNEL);
 309         if (!usb) {
 310                 fhci_err(fhci, "no memory for SCC data struct\n");
 311                 return NULL;
 312         }
 313
 314         usb->fhci = fhci;
 315         usb->hc_list = fhci->hc_list;
 316         usb->vroot_hub = fhci->vroot_hub;
 317
 318         usb->transfer_confirm = fhci_transfer_confirm_callback;
 319
 320         return usb;
 321 }
 322
 323 static int fhci_start(struct usb_hcd *hcd)
 324 {
 325         int ret;
 326         struct fhci_hcd *fhci = hcd_to_fhci(hcd);
 327
 328         ret = fhci_mem_init(fhci);
 329         if (ret) {
 330                 fhci_err(fhci, "failed to allocate memory\n");
 331                 goto err;
 332         }
 333
 334         fhci->usb_lld = fhci_create_lld(fhci);
 335         if (!fhci->usb_lld) {
 336                 fhci_err(fhci, "low level driver config failed\n");
 337                 ret = -ENOMEM;
 338                 goto err;
 339         }
 340
 341         ret = fhci_usb_init(fhci);
 342         if (ret) {
 343                 fhci_err(fhci, "low level driver initialize failed\n");
 344                 goto err;
 345         }
 346
 347         spin_lock_init(&fhci->lock);
 348
 349         /* connect the virtual root hub */
 350         fhci->vroot_hub->dev_num = 1;   /* this field may be needed to fix */
 351         fhci->vroot_hub->hub.wHubStatus = 0;
 352         fhci->vroot_hub->hub.wHubChange = 0;
 353         fhci->vroot_hub->port.wPortStatus = 0;
 354         fhci->vroot_hub->port.wPortChange = 0;
 355
 356         hcd->state = HC_STATE_RUNNING;
 357
 358         /*
 359          * From here on, khubd concurrently accesses the root
 360          * hub; drivers will be talking to enumerated devices.
 361          * (On restart paths, khubd already knows about the root
 362          * hub and could find work as soon as we wrote FLAG_CF.)
 363          *
 364          * Before this point the HC was idle/ready.  After, khubd
 365          * and device drivers may start it running.
 366          */
 367         fhci_usb_enable(fhci);
 368         return 0;
 369 err:
 370         fhci_mem_free(fhci);
 371         return ret;
 372 }
 373
 374 static void fhci_stop(struct usb_hcd *hcd)
 375 {
 376         struct fhci_hcd *fhci = hcd_to_fhci(hcd);
 377
 378         fhci_usb_disable_interrupt(fhci->usb_lld);
 379         fhci_usb_disable(fhci);
 380
 381         fhci_usb_free(fhci->usb_lld);
 382         fhci->usb_lld = NULL;
 383         fhci_mem_free(fhci);
 384 }
 385
 386 static int fhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
 387                             gfp_t mem_flags)
 388 {
 389         struct fhci_hcd *fhci = hcd_to_fhci(hcd);
 390         u32 pipe = urb->pipe;
 391         int ret;
 392         int i;
 393         int size = 0;
 394         struct urb_priv *urb_priv;
 395         unsigned long flags;
 396
 397         switch (usb_pipetype(pipe)) {
 398         case PIPE_CONTROL:
 399                 /* 1 td fro setup,1 for ack */
 400                 size = 2;
 401         case PIPE_BULK:
 402                 /* one td for every 4096 bytes(can be upto 8k) */
 403                 size += urb->transfer_buffer_length / 4096;
 404                 /* ...add for any remaining bytes... */
 405                 if ((urb->transfer_buffer_length % 4096) != 0)
 406                         size++;
 407                 /* ..and maybe a zero length packet to wrap it up */
 408                 if (size == 0)
 409                         size++;
 410                 else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0
 411                          && (urb->transfer_buffer_length
 412                              % usb_maxpacket(urb->dev, pipe,
 413                                              usb_pipeout(pipe))) != 0)
 414                         size++;
 415                 break;
 416         case PIPE_ISOCHRONOUS:
 417                 size = urb->number_of_packets;
 418                 if (size <= 0)
 419                         return -EINVAL;
 420                 for (i = 0; i < urb->number_of_packets; i++) {
 421                         urb->iso_frame_desc[i].actual_length = 0;
 422                         urb->iso_frame_desc[i].status = (u32) (-EXDEV);
 423                 }
 424                 break;
 425         case PIPE_INTERRUPT:
 426                 size = 1;
 427         }
 428
 429         /* allocate the private part of the URB */
 430         urb_priv = kzalloc(sizeof(*urb_priv), mem_flags);
 431         if (!urb_priv)
 432                 return -ENOMEM;
 433
 434         /* allocate the private part of the URB */
 435         urb_priv->tds = kzalloc(size * sizeof(struct td), mem_flags);
 436         if (!urb_priv->tds) {
 437                 kfree(urb_priv);
 438                 return -ENOMEM;
 439         }
 440
 441         spin_lock_irqsave(&fhci->lock, flags);
 442
 443         ret = usb_hcd_link_urb_to_ep(hcd, urb);
 444         if (ret)
 445                 goto err;
 446
 447         /* fill the private part of the URB */
 448         urb_priv->num_of_tds = size;
 449
 450         urb->status = -EINPROGRESS;
 451         urb->actual_length = 0;
 452         urb->error_count = 0;
 453         urb->hcpriv = urb_priv;
 454
 455         fhci_queue_urb(fhci, urb);
 456 err:
 457         if (ret) {
 458                 kfree(urb_priv->tds);
 459                 kfree(urb_priv);
 460         }
 461         spin_unlock_irqrestore(&fhci->lock, flags);
 462         return ret;
 463 }
 464
 465 /* dequeue FHCI URB */
 466 static int fhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 467 {
 468         struct fhci_hcd *fhci = hcd_to_fhci(hcd);
 469         struct fhci_usb *usb = fhci->usb_lld;
 470         int ret = -EINVAL;
 471         unsigned long flags;
 472
 473         if (!urb || !urb->dev || !urb->dev->bus)
 474                 goto out;
 475
 476         spin_lock_irqsave(&fhci->lock, flags);
 477
 478         ret = usb_hcd_check_unlink_urb(hcd, urb, status);
 479         if (ret)
 480                 goto out2;
 481
 482         if (usb->port_status != FHCI_PORT_DISABLED) {
 483                 struct urb_priv *urb_priv;
 484
 485                 /*
 486                  * flag the urb's data for deletion in some upcoming
 487                  * SF interrupt's delete list processing
 488                  */
 489                 urb_priv = urb->hcpriv;
 490
 491                 if (!urb_priv || (urb_priv->state == URB_DEL))
 492                         goto out2;
 493
 494                 urb_priv->state = URB_DEL;
 495
 496                 /* already pending? */
 497                 urb_priv->ed->state = FHCI_ED_URB_DEL;
 498         } else {
 499                 fhci_urb_complete_free(fhci, urb);
 500         }
 501
 502 out2:
 503         spin_unlock_irqrestore(&fhci->lock, flags);
 504 out:
 505         return ret;
 506 }
 507
 508 static void fhci_endpoint_disable(struct usb_hcd *hcd,
 509                                   struct usb_host_endpoint *ep)
 510 {
 511         struct fhci_hcd *fhci;
 512         struct ed *ed;
 513         unsigned long flags;
 514
 515         fhci = hcd_to_fhci(hcd);
 516         spin_lock_irqsave(&fhci->lock, flags);
 517         ed = ep->hcpriv;
 518         if (ed) {
 519                 while (ed->td_head != NULL) {
 520                         struct td *td = fhci_remove_td_from_ed(ed);
 521                         fhci_urb_complete_free(fhci, td->urb);
 522                 }
 523                 fhci_recycle_empty_ed(fhci, ed);
 524                 ep->hcpriv = NULL;
 525         }
 526         spin_unlock_irqrestore(&fhci->lock, flags);
 527 }
 528
 529 static int fhci_get_frame_number(struct usb_hcd *hcd)
 530 {
 531         struct fhci_hcd *fhci = hcd_to_fhci(hcd);
 532
 533         return get_frame_num(fhci);
 534 }
 535
 536 static const struct hc_driver fhci_driver = {
 537         .description = "fsl,usb-fhci",
 538         .product_desc = "FHCI HOST Controller",
 539         .hcd_priv_size = sizeof(struct fhci_hcd),
 540
 541         /* generic hardware linkage */
 542         .irq = fhci_irq,
 543         .flags = HCD_USB11 | HCD_MEMORY,
 544
 545         /* basic lifecycle operation */
 546         .start = fhci_start,
 547         .stop = fhci_stop,
 548
 549         /* managing i/o requests and associated device resources */
 550         .urb_enqueue = fhci_urb_enqueue,
 551         .urb_dequeue = fhci_urb_dequeue,
 552         .endpoint_disable = fhci_endpoint_disable,
 553
 554         /* scheduling support */
 555         .get_frame_number = fhci_get_frame_number,
 556
 557         /* root hub support */
 558         .hub_status_data = fhci_hub_status_data,
 559         .hub_control = fhci_hub_control,
 560 };
 561
 562 static int __devinit of_fhci_probe(struct of_device *ofdev,
 563                                    const struct of_device_id *ofid)
 564 {
 565         struct device *dev = &ofdev->dev;
 566         struct device_node *node = ofdev->node;
 567         struct usb_hcd *hcd;
 568         struct fhci_hcd *fhci;
 569         struct resource usb_regs;
 570         unsigned long pram_addr;
 571         unsigned int usb_irq;
 572         const char *sprop;
 573         const u32 *iprop;
 574         int size;
 575         int ret;
 576         int i;
 577         int j;
 578
 579         if (usb_disabled())
 580                 return -ENODEV;
 581
 582         sprop = of_get_property(node, "mode", NULL);
 583         if (sprop && strcmp(sprop, "host"))
 584                 return -ENODEV;
 585
 586         hcd = usb_create_hcd(&fhci_driver, dev, dev_name(dev));
 587         if (!hcd) {
 588                 dev_err(dev, "could not create hcd\n");
 589                 return -ENOMEM;
 590         }
 591
 592         fhci = hcd_to_fhci(hcd);
 593         hcd->self.controller = dev;
 594         dev_set_drvdata(dev, hcd);
 595
 596         iprop = of_get_property(node, "hub-power-budget", &size);
 597         if (iprop && size == sizeof(*iprop))
 598                 hcd->power_budget = *iprop;
 599
 600         /* FHCI registers. */
 601         ret = of_address_to_resource(node, 0, &usb_regs);
 602         if (ret) {
 603                 dev_err(dev, "could not get regs\n");
 604                 goto err_regs;
 605         }
 606
 607         hcd->regs = ioremap(usb_regs.start, usb_regs.end - usb_regs.start + 1);
 608         if (!hcd->regs) {
 609                 dev_err(dev, "could not ioremap regs\n");
 610                 ret = -ENOMEM;
 611                 goto err_regs;
 612         }
 613         fhci->regs = hcd->regs;
 614
 615         /* Parameter RAM. */
 616         iprop = of_get_property(node, "reg", &size);
 617         if (!iprop || size < sizeof(*iprop) * 4) {
 618                 dev_err(dev, "can't get pram offset\n");
 619                 ret = -EINVAL;
 620                 goto err_pram;
 621         }
 622
 623         pram_addr = cpm_muram_alloc_fixed(iprop[2], FHCI_PRAM_SIZE);
 624         if (IS_ERR_VALUE(pram_addr)) {
 625                 dev_err(dev, "failed to allocate usb pram\n");
 626                 ret = -ENOMEM;
 627                 goto err_pram;
 628         }
 629         fhci->pram = cpm_muram_addr(pram_addr);
 630
 631         /* GPIOs and pins */
 632         for (i = 0; i < NUM_GPIOS; i++) {
 633                 int gpio;
 634                 enum of_gpio_flags flags;
 635
 636                 gpio = of_get_gpio_flags(node, i, &flags);
 637                 fhci->gpios[i] = gpio;
 638                 fhci->alow_gpios[i] = flags & OF_GPIO_ACTIVE_LOW;
 639
 640                 if (!gpio_is_valid(gpio)) {
 641                         if (i < GPIO_SPEED) {
 642                                 dev_err(dev, "incorrect GPIO%d: %d\n",
 643                                         i, gpio);
 644                                 goto err_gpios;
 645                         } else {
 646                                 dev_info(dev, "assuming board doesn't have "
 647                                         "%s gpio\n", i == GPIO_SPEED ?
 648                                         "speed" : "power");
 649                                 continue;
 650                         }
 651                 }
 652
 653                 ret = gpio_request(gpio, dev_name(dev));
 654                 if (ret) {
 655                         dev_err(dev, "failed to request gpio %d", i);
 656                         goto err_gpios;
 657                 }
 658
 659                 if (i >= GPIO_SPEED) {
 660                         ret = gpio_direction_output(gpio, 0);
 661                         if (ret) {
 662                                 dev_err(dev, "failed to set gpio %d as "
 663                                         "an output\n", i);
 664                                 i++;
 665                                 goto err_gpios;
 666                         }
 667                 }
 668         }
 669
 670         for (j = 0; j < NUM_PINS; j++) {
 671                 fhci->pins[j] = qe_pin_request(ofdev->node, j);
 672                 if (IS_ERR(fhci->pins[j])) {
 673                         ret = PTR_ERR(fhci->pins[j]);
 674                         dev_err(dev, "can't get pin %d: %d\n", j, ret);
 675                         goto err_pins;
 676                 }
 677         }
 678
 679         /* Frame limit timer and its interrupt. */
 680         fhci->timer = gtm_get_timer16();
 681         if (IS_ERR(fhci->timer)) {
 682                 ret = PTR_ERR(fhci->timer);
 683                 dev_err(dev, "failed to request qe timer: %i", ret);
 684                 goto err_get_timer;
 685         }
 686
 687         ret = request_irq(fhci->timer->irq, fhci_frame_limit_timer_irq,
 688                           IRQF_DISABLED, "qe timer (usb)", hcd);
 689         if (ret) {
 690                 dev_err(dev, "failed to request timer irq");
 691                 goto err_timer_irq;
 692         }
 693
 694         /* USB Host interrupt. */
 695         usb_irq = irq_of_parse_and_map(node, 0);
 696         if (usb_irq == NO_IRQ) {
 697                 dev_err(dev, "could not get usb irq\n");
 698                 ret = -EINVAL;
 699                 goto err_usb_irq;
 700         }
 701
 702         /* Clocks. */
 703         sprop = of_get_property(node, "fsl,fullspeed-clock", NULL);
 704         if (sprop) {
 705                 fhci->fullspeed_clk = qe_clock_source(sprop);
 706                 if (fhci->fullspeed_clk == QE_CLK_DUMMY) {
 707                         dev_err(dev, "wrong fullspeed-clock\n");
 708                         ret = -EINVAL;
 709                         goto err_clocks;
 710                 }
 711         }
 712
 713         sprop = of_get_property(node, "fsl,lowspeed-clock", NULL);
 714         if (sprop) {
 715                 fhci->lowspeed_clk = qe_clock_source(sprop);
 716                 if (fhci->lowspeed_clk == QE_CLK_DUMMY) {
 717                         dev_err(dev, "wrong lowspeed-clock\n");
 718                         ret = -EINVAL;
 719                         goto err_clocks;
 720                 }
 721         }
 722
 723         if (fhci->fullspeed_clk == QE_CLK_NONE &&
 724                         fhci->lowspeed_clk == QE_CLK_NONE) {
 725                 dev_err(dev, "no clocks specified\n");
 726                 ret = -EINVAL;
 727                 goto err_clocks;
 728         }
 729
 730         dev_info(dev, "at 0x%p, irq %d\n", hcd->regs, usb_irq);
 731
 732         fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF);
 733
 734         /* Start with full-speed, if possible. */
 735         if (fhci->fullspeed_clk != QE_CLK_NONE) {
 736                 fhci_config_transceiver(fhci, FHCI_PORT_FULL);
 737                 qe_usb_clock_set(fhci->fullspeed_clk, USB_CLOCK);
 738         } else {
 739                 fhci_config_transceiver(fhci, FHCI_PORT_LOW);
 740                 qe_usb_clock_set(fhci->lowspeed_clk, USB_CLOCK >> 3);
 741         }
 742
 743         /* Clear and disable any pending interrupts. */
 744         out_be16(&fhci->regs->usb_event, 0xffff);
 745         out_be16(&fhci->regs->usb_mask, 0);
 746
 747         ret = usb_add_hcd(hcd, usb_irq, IRQF_DISABLED);
 748         if (ret < 0)
 749                 goto err_add_hcd;
 750
 751         fhci_dfs_create(fhci);
 752
 753         return 0;
 754
 755 err_add_hcd:
 756 err_clocks:
 757         irq_dispose_mapping(usb_irq);
 758 err_usb_irq:
 759         free_irq(fhci->timer->irq, hcd);
 760 err_timer_irq:
 761         gtm_put_timer16(fhci->timer);
 762 err_get_timer:
 763 err_pins:
 764         while (--j >= 0)
 765                 qe_pin_free(fhci->pins[j]);
 766 err_gpios:
 767         while (--i >= 0) {
 768                 if (gpio_is_valid(fhci->gpios[i]))
 769                         gpio_free(fhci->gpios[i]);
 770         }
 771         cpm_muram_free(pram_addr);
 772 err_pram:
 773         iounmap(hcd->regs);
 774 err_regs:
 775         usb_put_hcd(hcd);
 776         return ret;
 777 }
 778
 779 static int __devexit fhci_remove(struct device *dev)
 780 {
 781         struct usb_hcd *hcd = dev_get_drvdata(dev);
 782         struct fhci_hcd *fhci = hcd_to_fhci(hcd);
 783         int i;
 784         int j;
 785
 786         usb_remove_hcd(hcd);
 787         free_irq(fhci->timer->irq, hcd);
 788         gtm_put_timer16(fhci->timer);
 789         cpm_muram_free(cpm_muram_offset(fhci->pram));
 790         for (i = 0; i < NUM_GPIOS; i++) {
 791                 if (!gpio_is_valid(fhci->gpios[i]))
 792                         continue;
 793                 gpio_free(fhci->gpios[i]);
 794         }
 795         for (j = 0; j < NUM_PINS; j++)
 796                 qe_pin_free(fhci->pins[j]);
 797         fhci_dfs_destroy(fhci);
 798         usb_put_hcd(hcd);
 799         return 0;
 800 }
 801
 802 static int __devexit of_fhci_remove(struct of_device *ofdev)
 803 {
 804         return fhci_remove(&ofdev->dev);
 805 }
 806
 807 static struct of_device_id of_fhci_match[] = {
 808         { .compatible = "fsl,mpc8323-qe-usb", },
 809         {},
 810 };
 811 MODULE_DEVICE_TABLE(of, of_fhci_match);
 812
 813 static struct of_platform_driver of_fhci_driver = {
 814         .name           = "fsl,usb-fhci",
 815         .match_table    = of_fhci_match,
 816         .probe          = of_fhci_probe,
 817         .remove         = __devexit_p(of_fhci_remove),
 818 };
 819
 820 static int __init fhci_module_init(void)
 821 {
 822         return of_register_platform_driver(&of_fhci_driver);
 823 }
 824 module_init(fhci_module_init);
 825
 826 static void __exit fhci_module_exit(void)
 827 {
 828         of_unregister_platform_driver(&of_fhci_driver);
 829 }
 830 module_exit(fhci_module_exit);
 831
 832 MODULE_DESCRIPTION("USB Freescale Host Controller Interface Driver");
 833 MODULE_AUTHOR("Shlomi Gridish <gridish@freescale.com>, "
 834               "Jerry Huang <Chang-Ming.Huang@freescale.com>, "
 835               "Anton Vorontsov <avorontsov@ru.mvista.com>");
 836 MODULE_LICENSE("GPL");