drivers/usb/host/fhci-hcd.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Freescale QUICC Engine USB Host Controller Driver
   4  *
   5  * Copyright (c) Freescale Semicondutor, Inc. 2006.
   6  *               Shlomi Gridish <gridish@freescale.com>
   7  *               Jerry Huang <Chang-Ming.Huang@freescale.com>
   8  * Copyright (c) Logic Product Development, Inc. 2007
   9  *               Peter Barada <peterb@logicpd.com>
  10  * Copyright (c) MontaVista Software, Inc. 2008.
  11  *               Anton Vorontsov <avorontsov@ru.mvista.com>
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/types.h>
  16 #include <linux/spinlock.h>
  17 #include <linux/kernel.h>
  18 #include <linux/delay.h>
  19 #include <linux/errno.h>
  20 #include <linux/list.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/io.h>
  23 #include <linux/usb.h>
  24 #include <linux/usb/hcd.h>
  25 #include <linux/of.h>
  26 #include <linux/of_address.h>
  27 #include <linux/of_irq.h>
  28 #include <linux/platform_device.h>
  29 #include <linux/slab.h>
  30 #include <linux/gpio/consumer.h>
  31 #include <soc/fsl/qe/qe.h>
  32 #include <asm/fsl_gtm.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_ussft, 0);
  43         setbits8(&fhci->regs->usb_usmod, 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_usmod, 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_ussft) / 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_usber, 0xffff);
  91                 out_be16(&usb->fhci->regs->usb_usbmr, 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 /* disable 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                 /* disable 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_usbmr, 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_usber, 0xffff);
 122         out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk);
 123         setbits8(&usb->fhci->regs->usb_usmod, 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_usmod, 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 (!gpiod_get_value(fhci->gpiods[GPIO_USBOE]))
 155                 return -1;
 156
 157         /* check USBRP */
 158         if (gpiod_get_value(fhci->gpiods[GPIO_USBRP]))
 159                 bits |= 0x2;
 160
 161         /* check USBRN */
 162         if (gpiod_get_value(fhci->gpiods[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_usmod, USB_MODE_HOST | USB_MODE_EN);
 288
 289         /* clearing the mask register */
 290         out_be16(&usb->fhci->regs->usb_usbmr, 0);
 291
 292         /* initialing the event register */
 293         out_be16(&usb->fhci->regs->usb_usber, 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                 return NULL;
 312
 313         usb->fhci = fhci;
 314         usb->hc_list = fhci->hc_list;
 315         usb->vroot_hub = fhci->vroot_hub;
 316
 317         usb->transfer_confirm = fhci_transfer_confirm_callback;
 318
 319         return usb;
 320 }
 321
 322 static int fhci_start(struct usb_hcd *hcd)
 323 {
 324         int ret;
 325         struct fhci_hcd *fhci = hcd_to_fhci(hcd);
 326
 327         ret = fhci_mem_init(fhci);
 328         if (ret) {
 329                 fhci_err(fhci, "failed to allocate memory\n");
 330                 goto err;
 331         }
 332
 333         fhci->usb_lld = fhci_create_lld(fhci);
 334         if (!fhci->usb_lld) {
 335                 fhci_err(fhci, "low level driver config failed\n");
 336                 ret = -ENOMEM;
 337                 goto err;
 338         }
 339
 340         ret = fhci_usb_init(fhci);
 341         if (ret) {
 342                 fhci_err(fhci, "low level driver initialize failed\n");
 343                 goto err;
 344         }
 345
 346         spin_lock_init(&fhci->lock);
 347
 348         /* connect the virtual root hub */
 349         fhci->vroot_hub->dev_num = 1;   /* this field may be needed to fix */
 350         fhci->vroot_hub->hub.wHubStatus = 0;
 351         fhci->vroot_hub->hub.wHubChange = 0;
 352         fhci->vroot_hub->port.wPortStatus = 0;
 353         fhci->vroot_hub->port.wPortChange = 0;
 354
 355         hcd->state = HC_STATE_RUNNING;
 356
 357         /*
 358          * From here on, hub_wq concurrently accesses the root
 359          * hub; drivers will be talking to enumerated devices.
 360          * (On restart paths, hub_wq already knows about the root
 361          * hub and could find work as soon as we wrote FLAG_CF.)
 362          *
 363          * Before this point the HC was idle/ready.  After, hub_wq
 364          * and device drivers may start it running.
 365          */
 366         fhci_usb_enable(fhci);
 367         return 0;
 368 err:
 369         fhci_mem_free(fhci);
 370         return ret;
 371 }
 372
 373 static void fhci_stop(struct usb_hcd *hcd)
 374 {
 375         struct fhci_hcd *fhci = hcd_to_fhci(hcd);
 376
 377         fhci_usb_disable_interrupt(fhci->usb_lld);
 378         fhci_usb_disable(fhci);
 379
 380         fhci_usb_free(fhci->usb_lld);
 381         fhci->usb_lld = NULL;
 382         fhci_mem_free(fhci);
 383 }
 384
 385 static int fhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
 386                             gfp_t mem_flags)
 387 {
 388         struct fhci_hcd *fhci = hcd_to_fhci(hcd);
 389         u32 pipe = urb->pipe;
 390         int ret;
 391         int i;
 392         int size = 0;
 393         struct urb_priv *urb_priv;
 394         unsigned long flags;
 395
 396         switch (usb_pipetype(pipe)) {
 397         case PIPE_CONTROL:
 398                 /* 1 td fro setup,1 for ack */
 399                 size = 2;
 400                 fallthrough;
 401         case PIPE_BULK:
 402                 /* one td for every 4096 bytes(can be up to 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)) != 0)
 413                         size++;
 414                 break;
 415         case PIPE_ISOCHRONOUS:
 416                 size = urb->number_of_packets;
 417                 if (size <= 0)
 418                         return -EINVAL;
 419                 for (i = 0; i < urb->number_of_packets; i++) {
 420                         urb->iso_frame_desc[i].actual_length = 0;
 421                         urb->iso_frame_desc[i].status = (u32) (-EXDEV);
 422                 }
 423                 break;
 424         case PIPE_INTERRUPT:
 425                 size = 1;
 426         }
 427
 428         /* allocate the private part of the URB */
 429         urb_priv = kzalloc(sizeof(*urb_priv), mem_flags);
 430         if (!urb_priv)
 431                 return -ENOMEM;
 432
 433         /* allocate the private part of the URB */
 434         urb_priv->tds = kcalloc(size, sizeof(*urb_priv->tds), mem_flags);
 435         if (!urb_priv->tds) {
 436                 kfree(urb_priv);
 437                 return -ENOMEM;
 438         }
 439
 440         spin_lock_irqsave(&fhci->lock, flags);
 441
 442         ret = usb_hcd_link_urb_to_ep(hcd, urb);
 443         if (ret)
 444                 goto err;
 445
 446         /* fill the private part of the URB */
 447         urb_priv->num_of_tds = size;
 448
 449         urb->status = -EINPROGRESS;
 450         urb->actual_length = 0;
 451         urb->error_count = 0;
 452         urb->hcpriv = urb_priv;
 453
 454         fhci_queue_urb(fhci, urb);
 455 err:
 456         if (ret) {
 457                 kfree(urb_priv->tds);
 458                 kfree(urb_priv);
 459         }
 460         spin_unlock_irqrestore(&fhci->lock, flags);
 461         return ret;
 462 }
 463
 464 /* dequeue FHCI URB */
 465 static int fhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 466 {
 467         struct fhci_hcd *fhci = hcd_to_fhci(hcd);
 468         struct fhci_usb *usb = fhci->usb_lld;
 469         int ret = -EINVAL;
 470         unsigned long flags;
 471
 472         if (!urb || !urb->dev || !urb->dev->bus)
 473                 goto out;
 474
 475         spin_lock_irqsave(&fhci->lock, flags);
 476
 477         ret = usb_hcd_check_unlink_urb(hcd, urb, status);
 478         if (ret)
 479                 goto out2;
 480
 481         if (usb->port_status != FHCI_PORT_DISABLED) {
 482                 struct urb_priv *urb_priv;
 483
 484                 /*
 485                  * flag the urb's data for deletion in some upcoming
 486                  * SF interrupt's delete list processing
 487                  */
 488                 urb_priv = urb->hcpriv;
 489
 490                 if (!urb_priv || (urb_priv->state == URB_DEL))
 491                         goto out2;
 492
 493                 urb_priv->state = URB_DEL;
 494
 495                 /* already pending? */
 496                 urb_priv->ed->state = FHCI_ED_URB_DEL;
 497         } else {
 498                 fhci_urb_complete_free(fhci, urb);
 499         }
 500
 501 out2:
 502         spin_unlock_irqrestore(&fhci->lock, flags);
 503 out:
 504         return ret;
 505 }
 506
 507 static void fhci_endpoint_disable(struct usb_hcd *hcd,
 508                                   struct usb_host_endpoint *ep)
 509 {
 510         struct fhci_hcd *fhci;
 511         struct ed *ed;
 512         unsigned long flags;
 513
 514         fhci = hcd_to_fhci(hcd);
 515         spin_lock_irqsave(&fhci->lock, flags);
 516         ed = ep->hcpriv;
 517         if (ed) {
 518                 while (ed->td_head != NULL) {
 519                         struct td *td = fhci_remove_td_from_ed(ed);
 520                         fhci_urb_complete_free(fhci, td->urb);
 521                 }
 522                 fhci_recycle_empty_ed(fhci, ed);
 523                 ep->hcpriv = NULL;
 524         }
 525         spin_unlock_irqrestore(&fhci->lock, flags);
 526 }
 527
 528 static int fhci_get_frame_number(struct usb_hcd *hcd)
 529 {
 530         struct fhci_hcd *fhci = hcd_to_fhci(hcd);
 531
 532         return get_frame_num(fhci);
 533 }
 534
 535 static const struct hc_driver fhci_driver = {
 536         .description = "fsl,usb-fhci",
 537         .product_desc = "FHCI HOST Controller",
 538         .hcd_priv_size = sizeof(struct fhci_hcd),
 539
 540         /* generic hardware linkage */
 541         .irq = fhci_irq,
 542         .flags = HCD_DMA | HCD_USB11 | HCD_MEMORY,
 543
 544         /* basic lifecycle operation */
 545         .start = fhci_start,
 546         .stop = fhci_stop,
 547
 548         /* managing i/o requests and associated device resources */
 549         .urb_enqueue = fhci_urb_enqueue,
 550         .urb_dequeue = fhci_urb_dequeue,
 551         .endpoint_disable = fhci_endpoint_disable,
 552
 553         /* scheduling support */
 554         .get_frame_number = fhci_get_frame_number,
 555
 556         /* root hub support */
 557         .hub_status_data = fhci_hub_status_data,
 558         .hub_control = fhci_hub_control,
 559 };
 560
 561 static int of_fhci_probe(struct platform_device *ofdev)
 562 {
 563         struct device *dev = &ofdev->dev;
 564         struct device_node *node = dev->of_node;
 565         struct usb_hcd *hcd;
 566         struct fhci_hcd *fhci;
 567         struct resource usb_regs;
 568         unsigned long pram_addr;
 569         unsigned int usb_irq;
 570         const char *sprop;
 571         const u32 *iprop;
 572         int size;
 573         int ret;
 574         int i;
 575         int j;
 576
 577         if (usb_disabled())
 578                 return -ENODEV;
 579
 580         sprop = of_get_property(node, "mode", NULL);
 581         if (sprop && strcmp(sprop, "host"))
 582                 return -ENODEV;
 583
 584         hcd = usb_create_hcd(&fhci_driver, dev, dev_name(dev));
 585         if (!hcd) {
 586                 dev_err(dev, "could not create hcd\n");
 587                 return -ENOMEM;
 588         }
 589
 590         fhci = hcd_to_fhci(hcd);
 591         hcd->self.controller = dev;
 592         dev_set_drvdata(dev, hcd);
 593
 594         iprop = of_get_property(node, "hub-power-budget", &size);
 595         if (iprop && size == sizeof(*iprop))
 596                 hcd->power_budget = *iprop;
 597
 598         /* FHCI registers. */
 599         ret = of_address_to_resource(node, 0, &usb_regs);
 600         if (ret) {
 601                 dev_err(dev, "could not get regs\n");
 602                 goto err_regs;
 603         }
 604
 605         hcd->regs = ioremap(usb_regs.start, resource_size(&usb_regs));
 606         if (!hcd->regs) {
 607                 dev_err(dev, "could not ioremap regs\n");
 608                 ret = -ENOMEM;
 609                 goto err_regs;
 610         }
 611         fhci->regs = hcd->regs;
 612
 613         /* Parameter RAM. */
 614         iprop = of_get_property(node, "reg", &size);
 615         if (!iprop || size < sizeof(*iprop) * 4) {
 616                 dev_err(dev, "can't get pram offset\n");
 617                 ret = -EINVAL;
 618                 goto err_pram;
 619         }
 620
 621         pram_addr = cpm_muram_alloc(FHCI_PRAM_SIZE, 64);
 622         if (IS_ERR_VALUE(pram_addr)) {
 623                 dev_err(dev, "failed to allocate usb pram\n");
 624                 ret = -ENOMEM;
 625                 goto err_pram;
 626         }
 627
 628         qe_issue_cmd(QE_ASSIGN_PAGE_TO_DEVICE, QE_CR_SUBBLOCK_USB,
 629                      QE_CR_PROTOCOL_UNSPECIFIED, pram_addr);
 630         fhci->pram = cpm_muram_addr(pram_addr);
 631
 632         /* GPIOs and pins */
 633         for (i = 0; i < NUM_GPIOS; i++) {
 634                 if (i < GPIO_SPEED)
 635                         fhci->gpiods[i] = devm_gpiod_get_index(dev,
 636                                         NULL, i, GPIOD_IN);
 637
 638                 else
 639                         fhci->gpiods[i] = devm_gpiod_get_index_optional(dev,
 640                                         NULL, i, GPIOD_OUT_LOW);
 641
 642                 if (IS_ERR(fhci->gpiods[i])) {
 643                         dev_err(dev, "incorrect GPIO%d: %ld\n",
 644                                 i, PTR_ERR(fhci->gpiods[i]));
 645                         goto err_gpios;
 646                 }
 647                 if (!fhci->gpiods[i]) {
 648                         dev_info(dev, "assuming board doesn't have "
 649                                  "%s gpio\n", i == GPIO_SPEED ?
 650                                  "speed" : "power");
 651                 }
 652         }
 653
 654         for (j = 0; j < NUM_PINS; j++) {
 655                 fhci->pins[j] = qe_pin_request(dev, j);
 656                 if (IS_ERR(fhci->pins[j])) {
 657                         ret = PTR_ERR(fhci->pins[j]);
 658                         dev_err(dev, "can't get pin %d: %d\n", j, ret);
 659                         goto err_pins;
 660                 }
 661         }
 662
 663         /* Frame limit timer and its interrupt. */
 664         fhci->timer = gtm_get_timer16();
 665         if (IS_ERR(fhci->timer)) {
 666                 ret = PTR_ERR(fhci->timer);
 667                 dev_err(dev, "failed to request qe timer: %i", ret);
 668                 goto err_get_timer;
 669         }
 670
 671         ret = request_irq(fhci->timer->irq, fhci_frame_limit_timer_irq,
 672                           0, "qe timer (usb)", hcd);
 673         if (ret) {
 674                 dev_err(dev, "failed to request timer irq");
 675                 goto err_timer_irq;
 676         }
 677
 678         /* USB Host interrupt. */
 679         usb_irq = irq_of_parse_and_map(node, 0);
 680         if (!usb_irq) {
 681                 dev_err(dev, "could not get usb irq\n");
 682                 ret = -EINVAL;
 683                 goto err_usb_irq;
 684         }
 685
 686         /* Clocks. */
 687         sprop = of_get_property(node, "fsl,fullspeed-clock", NULL);
 688         if (sprop) {
 689                 fhci->fullspeed_clk = qe_clock_source(sprop);
 690                 if (fhci->fullspeed_clk == QE_CLK_DUMMY) {
 691                         dev_err(dev, "wrong fullspeed-clock\n");
 692                         ret = -EINVAL;
 693                         goto err_clocks;
 694                 }
 695         }
 696
 697         sprop = of_get_property(node, "fsl,lowspeed-clock", NULL);
 698         if (sprop) {
 699                 fhci->lowspeed_clk = qe_clock_source(sprop);
 700                 if (fhci->lowspeed_clk == QE_CLK_DUMMY) {
 701                         dev_err(dev, "wrong lowspeed-clock\n");
 702                         ret = -EINVAL;
 703                         goto err_clocks;
 704                 }
 705         }
 706
 707         if (fhci->fullspeed_clk == QE_CLK_NONE &&
 708                         fhci->lowspeed_clk == QE_CLK_NONE) {
 709                 dev_err(dev, "no clocks specified\n");
 710                 ret = -EINVAL;
 711                 goto err_clocks;
 712         }
 713
 714         dev_info(dev, "at 0x%p, irq %d\n", hcd->regs, usb_irq);
 715
 716         fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF);
 717
 718         /* Start with full-speed, if possible. */
 719         if (fhci->fullspeed_clk != QE_CLK_NONE) {
 720                 fhci_config_transceiver(fhci, FHCI_PORT_FULL);
 721                 qe_usb_clock_set(fhci->fullspeed_clk, USB_CLOCK);
 722         } else {
 723                 fhci_config_transceiver(fhci, FHCI_PORT_LOW);
 724                 qe_usb_clock_set(fhci->lowspeed_clk, USB_CLOCK >> 3);
 725         }
 726
 727         /* Clear and disable any pending interrupts. */
 728         out_be16(&fhci->regs->usb_usber, 0xffff);
 729         out_be16(&fhci->regs->usb_usbmr, 0);
 730
 731         ret = usb_add_hcd(hcd, usb_irq, 0);
 732         if (ret < 0)
 733                 goto err_add_hcd;
 734
 735         device_wakeup_enable(hcd->self.controller);
 736
 737         fhci_dfs_create(fhci);
 738
 739         return 0;
 740
 741 err_add_hcd:
 742 err_clocks:
 743         irq_dispose_mapping(usb_irq);
 744 err_usb_irq:
 745         free_irq(fhci->timer->irq, hcd);
 746 err_timer_irq:
 747         gtm_put_timer16(fhci->timer);
 748 err_get_timer:
 749 err_pins:
 750         while (--j >= 0)
 751                 qe_pin_free(fhci->pins[j]);
 752 err_gpios:
 753         cpm_muram_free(pram_addr);
 754 err_pram:
 755         iounmap(hcd->regs);
 756 err_regs:
 757         usb_put_hcd(hcd);
 758         return ret;
 759 }
 760
 761 static void fhci_remove(struct device *dev)
 762 {
 763         struct usb_hcd *hcd = dev_get_drvdata(dev);
 764         struct fhci_hcd *fhci = hcd_to_fhci(hcd);
 765         int j;
 766
 767         usb_remove_hcd(hcd);
 768         free_irq(fhci->timer->irq, hcd);
 769         gtm_put_timer16(fhci->timer);
 770         cpm_muram_free(cpm_muram_offset(fhci->pram));
 771         for (j = 0; j < NUM_PINS; j++)
 772                 qe_pin_free(fhci->pins[j]);
 773         fhci_dfs_destroy(fhci);
 774         usb_put_hcd(hcd);
 775 }
 776
 777 static void of_fhci_remove(struct platform_device *ofdev)
 778 {
 779         fhci_remove(&ofdev->dev);
 780 }
 781
 782 static const struct of_device_id of_fhci_match[] = {
 783         { .compatible = "fsl,mpc8323-qe-usb", },
 784         {},
 785 };
 786 MODULE_DEVICE_TABLE(of, of_fhci_match);
 787
 788 static struct platform_driver of_fhci_driver = {
 789         .driver = {
 790                 .name = "fsl,usb-fhci",
 791                 .of_match_table = of_fhci_match,
 792         },
 793         .probe          = of_fhci_probe,
 794         .remove         = of_fhci_remove,
 795 };
 796
 797 module_platform_driver(of_fhci_driver);
 798
 799 MODULE_DESCRIPTION("USB Freescale Host Controller Interface Driver");
 800 MODULE_AUTHOR("Shlomi Gridish <gridish@freescale.com>, "
 801               "Jerry Huang <Chang-Ming.Huang@freescale.com>, "
 802               "Anton Vorontsov <avorontsov@ru.mvista.com>");
 803 MODULE_LICENSE("GPL");