drivers/usb/host/ehci-fsl.c

   1 /*
   2  * Copyright 2005-2009 MontaVista Software, Inc.
   3  * Copyright 2008      Freescale Semiconductor, Inc.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or (at your
   8  * option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software Foundation,
  17  * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  *
  19  * Ported to 834x by Randy Vinson <rvinson@mvista.com> using code provided
  20  * by Hunter Wu.
  21  * Power Management support by Dave Liu <daveliu@freescale.com>,
  22  * Jerry Huang <Chang-Ming.Huang@freescale.com> and
  23  * Anton Vorontsov <avorontsov@ru.mvista.com>.
  24  */
  25
  26 #include <linux/kernel.h>
  27 #include <linux/types.h>
  28 #include <linux/delay.h>
  29 #include <linux/pm.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/fsl_devices.h>
  32
  33 #include "ehci-fsl.h"
  34
  35 /* configure so an HC device and id are always provided */
  36 /* always called with process context; sleeping is OK */
  37
  38 /**
  39  * usb_hcd_fsl_probe - initialize FSL-based HCDs
  40  * @drvier: Driver to be used for this HCD
  41  * @pdev: USB Host Controller being probed
  42  * Context: !in_interrupt()
  43  *
  44  * Allocates basic resources for this USB host controller.
  45  *
  46  */
  47 static int usb_hcd_fsl_probe(const struct hc_driver *driver,
  48                              struct platform_device *pdev)
  49 {
  50         struct fsl_usb2_platform_data *pdata;
  51         struct usb_hcd *hcd;
  52         struct resource *res;
  53         int irq;
  54         int retval;
  55
  56         pr_debug("initializing FSL-SOC USB Controller\n");
  57
  58         /* Need platform data for setup */
  59         pdata = (struct fsl_usb2_platform_data *)pdev->dev.platform_data;
  60         if (!pdata) {
  61                 dev_err(&pdev->dev,
  62                         "No platform data for %s.\n", dev_name(&pdev->dev));
  63                 return -ENODEV;
  64         }
  65
  66         /*
  67          * This is a host mode driver, verify that we're supposed to be
  68          * in host mode.
  69          */
  70         if (!((pdata->operating_mode == FSL_USB2_DR_HOST) ||
  71               (pdata->operating_mode == FSL_USB2_MPH_HOST) ||
  72               (pdata->operating_mode == FSL_USB2_DR_OTG))) {
  73                 dev_err(&pdev->dev,
  74                         "Non Host Mode configured for %s. Wrong driver linked.\n",
  75                         dev_name(&pdev->dev));
  76                 return -ENODEV;
  77         }
  78
  79         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
  80         if (!res) {
  81                 dev_err(&pdev->dev,
  82                         "Found HC with no IRQ. Check %s setup!\n",
  83                         dev_name(&pdev->dev));
  84                 return -ENODEV;
  85         }
  86         irq = res->start;
  87
  88         hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
  89         if (!hcd) {
  90                 retval = -ENOMEM;
  91                 goto err1;
  92         }
  93
  94         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  95         if (!res) {
  96                 dev_err(&pdev->dev,
  97                         "Found HC with no register addr. Check %s setup!\n",
  98                         dev_name(&pdev->dev));
  99                 retval = -ENODEV;
 100                 goto err2;
 101         }
 102         hcd->rsrc_start = res->start;
 103         hcd->rsrc_len = resource_size(res);
 104         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
 105                                 driver->description)) {
 106                 dev_dbg(&pdev->dev, "controller already in use\n");
 107                 retval = -EBUSY;
 108                 goto err2;
 109         }
 110         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
 111
 112         if (hcd->regs == NULL) {
 113                 dev_dbg(&pdev->dev, "error mapping memory\n");
 114                 retval = -EFAULT;
 115                 goto err3;
 116         }
 117
 118         pdata->regs = hcd->regs;
 119
 120         if (pdata->power_budget)
 121                 hcd->power_budget = pdata->power_budget;
 122
 123         /*
 124          * do platform specific init: check the clock, grab/config pins, etc.
 125          */
 126         if (pdata->init && pdata->init(pdev)) {
 127                 retval = -ENODEV;
 128                 goto err4;
 129         }
 130
 131         /* Enable USB controller, 83xx or 8536 */
 132         if (pdata->have_sysif_regs)
 133                 setbits32(hcd->regs + FSL_SOC_USB_CTRL, 0x4);
 134
 135         /* Don't need to set host mode here. It will be done by tdi_reset() */
 136
 137         retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
 138         if (retval != 0)
 139                 goto err4;
 140
 141 #ifdef CONFIG_USB_OTG
 142         if (pdata->operating_mode == FSL_USB2_DR_OTG) {
 143                 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 144
 145                 ehci->transceiver = otg_get_transceiver();
 146                 dev_dbg(&pdev->dev, "hcd=0x%p  ehci=0x%p, transceiver=0x%p\n",
 147                         hcd, ehci, ehci->transceiver);
 148
 149                 if (ehci->transceiver) {
 150                         retval = otg_set_host(ehci->transceiver,
 151                                               &ehci_to_hcd(ehci)->self);
 152                         if (retval) {
 153                                 if (ehci->transceiver)
 154                                         put_device(ehci->transceiver->dev);
 155                                 goto err4;
 156                         }
 157                 } else {
 158                         dev_err(&pdev->dev, "can't find transceiver\n");
 159                         retval = -ENODEV;
 160                         goto err4;
 161                 }
 162         }
 163 #endif
 164         return retval;
 165
 166       err4:
 167         iounmap(hcd->regs);
 168       err3:
 169         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 170       err2:
 171         usb_put_hcd(hcd);
 172       err1:
 173         dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), retval);
 174         if (pdata->exit)
 175                 pdata->exit(pdev);
 176         return retval;
 177 }
 178
 179 /* may be called without controller electrically present */
 180 /* may be called with controller, bus, and devices active */
 181
 182 /**
 183  * usb_hcd_fsl_remove - shutdown processing for FSL-based HCDs
 184  * @dev: USB Host Controller being removed
 185  * Context: !in_interrupt()
 186  *
 187  * Reverses the effect of usb_hcd_fsl_probe().
 188  *
 189  */
 190 static void usb_hcd_fsl_remove(struct usb_hcd *hcd,
 191                                struct platform_device *pdev)
 192 {
 193         struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
 194         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 195
 196         if (ehci->transceiver) {
 197                 otg_set_host(ehci->transceiver, NULL);
 198                 put_device(ehci->transceiver->dev);
 199         }
 200
 201         usb_remove_hcd(hcd);
 202
 203         /*
 204          * do platform specific un-initialization:
 205          * release iomux pins, disable clock, etc.
 206          */
 207         if (pdata->exit)
 208                 pdata->exit(pdev);
 209         iounmap(hcd->regs);
 210         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 211         usb_put_hcd(hcd);
 212 }
 213
 214 static void ehci_fsl_setup_phy(struct ehci_hcd *ehci,
 215                                enum fsl_usb2_phy_modes phy_mode,
 216                                unsigned int port_offset)
 217 {
 218         u32 portsc;
 219         struct usb_hcd *hcd = ehci_to_hcd(ehci);
 220         void __iomem *non_ehci = hcd->regs;
 221
 222         portsc = ehci_readl(ehci, &ehci->regs->port_status[port_offset]);
 223         portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW);
 224
 225         switch (phy_mode) {
 226         case FSL_USB2_PHY_ULPI:
 227                 portsc |= PORT_PTS_ULPI;
 228                 break;
 229         case FSL_USB2_PHY_SERIAL:
 230                 portsc |= PORT_PTS_SERIAL;
 231                 break;
 232         case FSL_USB2_PHY_UTMI_WIDE:
 233                 portsc |= PORT_PTS_PTW;
 234                 /* fall through */
 235         case FSL_USB2_PHY_UTMI:
 236                 /* enable UTMI PHY */
 237                 setbits32(non_ehci + FSL_SOC_USB_CTRL, CTRL_UTMI_PHY_EN);
 238                 portsc |= PORT_PTS_UTMI;
 239                 break;
 240         case FSL_USB2_PHY_NONE:
 241                 break;
 242         }
 243         ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]);
 244 }
 245
 246 static void ehci_fsl_usb_setup(struct ehci_hcd *ehci)
 247 {
 248         struct usb_hcd *hcd = ehci_to_hcd(ehci);
 249         struct fsl_usb2_platform_data *pdata;
 250         void __iomem *non_ehci = hcd->regs;
 251         u32 temp;
 252
 253         pdata = hcd->self.controller->platform_data;
 254
 255         /* Enable PHY interface in the control reg. */
 256         if (pdata->have_sysif_regs) {
 257                 temp = in_be32(non_ehci + FSL_SOC_USB_CTRL);
 258                 out_be32(non_ehci + FSL_SOC_USB_CTRL, temp | 0x00000004);
 259                 out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0000001b);
 260         }
 261
 262 #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE)
 263         /*
 264          * Turn on cache snooping hardware, since some PowerPC platforms
 265          * wholly rely on hardware to deal with cache coherent
 266          */
 267
 268         /* Setup Snooping for all the 4GB space */
 269         /* SNOOP1 starts from 0x0, size 2G */
 270         out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0 | SNOOP_SIZE_2GB);
 271         /* SNOOP2 starts from 0x80000000, size 2G */
 272         out_be32(non_ehci + FSL_SOC_USB_SNOOP2, 0x80000000 | SNOOP_SIZE_2GB);
 273 #endif
 274
 275         /* Deal with USB erratum A-005275 */
 276         if (pdata->has_fsl_erratum_a005275 == 1)
 277                 ehci->has_fsl_hs_errata = 1;
 278
 279         if ((pdata->operating_mode == FSL_USB2_DR_HOST) ||
 280                         (pdata->operating_mode == FSL_USB2_DR_OTG))
 281                 ehci_fsl_setup_phy(ehci, pdata->phy_mode, 0);
 282
 283         if (pdata->operating_mode == FSL_USB2_MPH_HOST) {
 284                 unsigned int chip, rev, svr;
 285
 286                 svr = mfspr(SPRN_SVR);
 287                 chip = svr >> 16;
 288                 rev = (svr >> 4) & 0xf;
 289
 290                 /* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */
 291                 if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055))
 292                         ehci->has_fsl_port_bug = 1;
 293
 294                 if (pdata->port_enables & FSL_USB2_PORT0_ENABLED)
 295                         ehci_fsl_setup_phy(ehci, pdata->phy_mode, 0);
 296                 if (pdata->port_enables & FSL_USB2_PORT1_ENABLED)
 297                         ehci_fsl_setup_phy(ehci, pdata->phy_mode, 1);
 298         }
 299
 300         if (pdata->have_sysif_regs) {
 301 #ifdef CONFIG_PPC_85xx
 302                 out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x00000008);
 303                 out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000080);
 304 #else
 305                 out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x0000000c);
 306                 out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000040);
 307 #endif
 308                 out_be32(non_ehci + FSL_SOC_USB_SICTRL, 0x00000001);
 309         }
 310 }
 311
 312 /* called after powerup, by probe or system-pm "wakeup" */
 313 static int ehci_fsl_reinit(struct ehci_hcd *ehci)
 314 {
 315         ehci_fsl_usb_setup(ehci);
 316         ehci_port_power(ehci, 0);
 317
 318         return 0;
 319 }
 320
 321 /* called during probe() after chip reset completes */
 322 static int ehci_fsl_setup(struct usb_hcd *hcd)
 323 {
 324         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 325         int retval;
 326         struct fsl_usb2_platform_data *pdata;
 327
 328         pdata = hcd->self.controller->platform_data;
 329         ehci->big_endian_desc = pdata->big_endian_desc;
 330         ehci->big_endian_mmio = pdata->big_endian_mmio;
 331
 332         /* EHCI registers start at offset 0x100 */
 333         ehci->caps = hcd->regs + 0x100;
 334         ehci->regs = hcd->regs + 0x100 +
 335                 HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
 336         dbg_hcs_params(ehci, "reset");
 337         dbg_hcc_params(ehci, "reset");
 338
 339         /* cache this readonly data; minimize chip reads */
 340         ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
 341
 342         hcd->has_tt = 1;
 343
 344         retval = ehci_halt(ehci);
 345         if (retval)
 346                 return retval;
 347
 348         /* data structure init */
 349         retval = ehci_init(hcd);
 350         if (retval)
 351                 return retval;
 352
 353         ehci->sbrn = 0x20;
 354
 355         ehci_reset(ehci);
 356
 357         retval = ehci_fsl_reinit(ehci);
 358         return retval;
 359 }
 360
 361 struct ehci_fsl {
 362         struct ehci_hcd ehci;
 363
 364 #ifdef CONFIG_PM
 365         /* Saved USB PHY settings, need to restore after deep sleep. */
 366         u32 usb_ctrl;
 367 #endif
 368 };
 369
 370 #ifdef CONFIG_PM
 371
 372 #ifdef CONFIG_PPC_MPC512x
 373 static int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
 374 {
 375         struct usb_hcd *hcd = dev_get_drvdata(dev);
 376         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 377         struct fsl_usb2_platform_data *pdata = dev->platform_data;
 378         u32 tmp;
 379
 380 #ifdef DEBUG
 381         u32 mode = ehci_readl(ehci, hcd->regs + FSL_SOC_USB_USBMODE);
 382         mode &= USBMODE_CM_MASK;
 383         tmp = ehci_readl(ehci, hcd->regs + 0x140);      /* usbcmd */
 384
 385         dev_dbg(dev, "suspend=%d already_suspended=%d "
 386                 "mode=%d  usbcmd %08x\n", pdata->suspended,
 387                 pdata->already_suspended, mode, tmp);
 388 #endif
 389
 390         /*
 391          * If the controller is already suspended, then this must be a
 392          * PM suspend.  Remember this fact, so that we will leave the
 393          * controller suspended at PM resume time.
 394          */
 395         if (pdata->suspended) {
 396                 dev_dbg(dev, "already suspended, leaving early\n");
 397                 pdata->already_suspended = 1;
 398                 return 0;
 399         }
 400
 401         dev_dbg(dev, "suspending...\n");
 402
 403         ehci->rh_state = EHCI_RH_SUSPENDED;
 404         dev->power.power_state = PMSG_SUSPEND;
 405
 406         /* ignore non-host interrupts */
 407         clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 408
 409         /* stop the controller */
 410         tmp = ehci_readl(ehci, &ehci->regs->command);
 411         tmp &= ~CMD_RUN;
 412         ehci_writel(ehci, tmp, &ehci->regs->command);
 413
 414         /* save EHCI registers */
 415         pdata->pm_command = ehci_readl(ehci, &ehci->regs->command);
 416         pdata->pm_command &= ~CMD_RUN;
 417         pdata->pm_status  = ehci_readl(ehci, &ehci->regs->status);
 418         pdata->pm_intr_enable  = ehci_readl(ehci, &ehci->regs->intr_enable);
 419         pdata->pm_frame_index  = ehci_readl(ehci, &ehci->regs->frame_index);
 420         pdata->pm_segment  = ehci_readl(ehci, &ehci->regs->segment);
 421         pdata->pm_frame_list  = ehci_readl(ehci, &ehci->regs->frame_list);
 422         pdata->pm_async_next  = ehci_readl(ehci, &ehci->regs->async_next);
 423         pdata->pm_configured_flag  =
 424                 ehci_readl(ehci, &ehci->regs->configured_flag);
 425         pdata->pm_portsc = ehci_readl(ehci, &ehci->regs->port_status[0]);
 426         pdata->pm_usbgenctrl = ehci_readl(ehci,
 427                                           hcd->regs + FSL_SOC_USB_USBGENCTRL);
 428
 429         /* clear the W1C bits */
 430         pdata->pm_portsc &= cpu_to_hc32(ehci, ~PORT_RWC_BITS);
 431
 432         pdata->suspended = 1;
 433
 434         /* clear PP to cut power to the port */
 435         tmp = ehci_readl(ehci, &ehci->regs->port_status[0]);
 436         tmp &= ~PORT_POWER;
 437         ehci_writel(ehci, tmp, &ehci->regs->port_status[0]);
 438
 439         return 0;
 440 }
 441
 442 static int ehci_fsl_mpc512x_drv_resume(struct device *dev)
 443 {
 444         struct usb_hcd *hcd = dev_get_drvdata(dev);
 445         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 446         struct fsl_usb2_platform_data *pdata = dev->platform_data;
 447         u32 tmp;
 448
 449         dev_dbg(dev, "suspend=%d already_suspended=%d\n",
 450                 pdata->suspended, pdata->already_suspended);
 451
 452         /*
 453          * If the controller was already suspended at suspend time,
 454          * then don't resume it now.
 455          */
 456         if (pdata->already_suspended) {
 457                 dev_dbg(dev, "already suspended, leaving early\n");
 458                 pdata->already_suspended = 0;
 459                 return 0;
 460         }
 461
 462         if (!pdata->suspended) {
 463                 dev_dbg(dev, "not suspended, leaving early\n");
 464                 return 0;
 465         }
 466
 467         pdata->suspended = 0;
 468
 469         dev_dbg(dev, "resuming...\n");
 470
 471         /* set host mode */
 472         tmp = USBMODE_CM_HOST | (pdata->es ? USBMODE_ES : 0);
 473         ehci_writel(ehci, tmp, hcd->regs + FSL_SOC_USB_USBMODE);
 474
 475         ehci_writel(ehci, pdata->pm_usbgenctrl,
 476                     hcd->regs + FSL_SOC_USB_USBGENCTRL);
 477         ehci_writel(ehci, ISIPHYCTRL_PXE | ISIPHYCTRL_PHYE,
 478                     hcd->regs + FSL_SOC_USB_ISIPHYCTRL);
 479
 480         /* restore EHCI registers */
 481         ehci_writel(ehci, pdata->pm_command, &ehci->regs->command);
 482         ehci_writel(ehci, pdata->pm_intr_enable, &ehci->regs->intr_enable);
 483         ehci_writel(ehci, pdata->pm_frame_index, &ehci->regs->frame_index);
 484         ehci_writel(ehci, pdata->pm_segment, &ehci->regs->segment);
 485         ehci_writel(ehci, pdata->pm_frame_list, &ehci->regs->frame_list);
 486         ehci_writel(ehci, pdata->pm_async_next, &ehci->regs->async_next);
 487         ehci_writel(ehci, pdata->pm_configured_flag,
 488                     &ehci->regs->configured_flag);
 489         ehci_writel(ehci, pdata->pm_portsc, &ehci->regs->port_status[0]);
 490
 491         set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 492         ehci->rh_state = EHCI_RH_RUNNING;
 493         dev->power.power_state = PMSG_ON;
 494
 495         tmp = ehci_readl(ehci, &ehci->regs->command);
 496         tmp |= CMD_RUN;
 497         ehci_writel(ehci, tmp, &ehci->regs->command);
 498
 499         usb_hcd_resume_root_hub(hcd);
 500
 501         return 0;
 502 }
 503 #else
 504 static inline int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
 505 {
 506         return 0;
 507 }
 508
 509 static inline int ehci_fsl_mpc512x_drv_resume(struct device *dev)
 510 {
 511         return 0;
 512 }
 513 #endif /* CONFIG_PPC_MPC512x */
 514
 515 static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd)
 516 {
 517         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 518
 519         return container_of(ehci, struct ehci_fsl, ehci);
 520 }
 521
 522 static int ehci_fsl_drv_suspend(struct device *dev)
 523 {
 524         struct usb_hcd *hcd = dev_get_drvdata(dev);
 525         struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
 526         void __iomem *non_ehci = hcd->regs;
 527
 528         if (of_device_is_compatible(dev->parent->of_node,
 529                                     "fsl,mpc5121-usb2-dr")) {
 530                 return ehci_fsl_mpc512x_drv_suspend(dev);
 531         }
 532
 533         ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd),
 534                         device_may_wakeup(dev));
 535         if (!fsl_deep_sleep())
 536                 return 0;
 537
 538         ehci_fsl->usb_ctrl = in_be32(non_ehci + FSL_SOC_USB_CTRL);
 539         return 0;
 540 }
 541
 542 static int ehci_fsl_drv_resume(struct device *dev)
 543 {
 544         struct usb_hcd *hcd = dev_get_drvdata(dev);
 545         struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
 546         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 547         void __iomem *non_ehci = hcd->regs;
 548
 549         if (of_device_is_compatible(dev->parent->of_node,
 550                                     "fsl,mpc5121-usb2-dr")) {
 551                 return ehci_fsl_mpc512x_drv_resume(dev);
 552         }
 553
 554         ehci_prepare_ports_for_controller_resume(ehci);
 555         if (!fsl_deep_sleep())
 556                 return 0;
 557
 558         usb_root_hub_lost_power(hcd->self.root_hub);
 559
 560         /* Restore USB PHY settings and enable the controller. */
 561         out_be32(non_ehci + FSL_SOC_USB_CTRL, ehci_fsl->usb_ctrl);
 562
 563         ehci_reset(ehci);
 564         ehci_fsl_reinit(ehci);
 565
 566         return 0;
 567 }
 568
 569 static int ehci_fsl_drv_restore(struct device *dev)
 570 {
 571         struct usb_hcd *hcd = dev_get_drvdata(dev);
 572
 573         usb_root_hub_lost_power(hcd->self.root_hub);
 574         return 0;
 575 }
 576
 577 static struct dev_pm_ops ehci_fsl_pm_ops = {
 578         .suspend = ehci_fsl_drv_suspend,
 579         .resume = ehci_fsl_drv_resume,
 580         .restore = ehci_fsl_drv_restore,
 581 };
 582
 583 #define EHCI_FSL_PM_OPS         (&ehci_fsl_pm_ops)
 584 #else
 585 #define EHCI_FSL_PM_OPS         NULL
 586 #endif /* CONFIG_PM */
 587
 588 #ifdef CONFIG_USB_OTG
 589 static int ehci_start_port_reset(struct usb_hcd *hcd, unsigned port)
 590 {
 591         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 592         u32 status;
 593
 594         if (!port)
 595                 return -EINVAL;
 596
 597         port--;
 598
 599         /* start port reset before HNP protocol time out */
 600         status = readl(&ehci->regs->port_status[port]);
 601         if (!(status & PORT_CONNECT))
 602                 return -ENODEV;
 603
 604         /* khubd will finish the reset later */
 605         if (ehci_is_TDI(ehci)) {
 606                 writel(PORT_RESET |
 607                        (status & ~(PORT_CSC | PORT_PEC | PORT_OCC)),
 608                        &ehci->regs->port_status[port]);
 609         } else {
 610                 writel(PORT_RESET, &ehci->regs->port_status[port]);
 611         }
 612
 613         return 0;
 614 }
 615 #else
 616 #define ehci_start_port_reset   NULL
 617 #endif /* CONFIG_USB_OTG */
 618
 619
 620 static const struct hc_driver ehci_fsl_hc_driver = {
 621         .description = hcd_name,
 622         .product_desc = "Freescale On-Chip EHCI Host Controller",
 623         .hcd_priv_size = sizeof(struct ehci_fsl),
 624
 625         /*
 626          * generic hardware linkage
 627          */
 628         .irq = ehci_irq,
 629         .flags = HCD_USB2 | HCD_MEMORY,
 630
 631         /*
 632          * basic lifecycle operations
 633          */
 634         .reset = ehci_fsl_setup,
 635         .start = ehci_run,
 636         .stop = ehci_stop,
 637         .shutdown = ehci_shutdown,
 638
 639         /*
 640          * managing i/o requests and associated device resources
 641          */
 642         .urb_enqueue = ehci_urb_enqueue,
 643         .urb_dequeue = ehci_urb_dequeue,
 644         .endpoint_disable = ehci_endpoint_disable,
 645         .endpoint_reset = ehci_endpoint_reset,
 646
 647         /*
 648          * scheduling support
 649          */
 650         .get_frame_number = ehci_get_frame,
 651
 652         /*
 653          * root hub support
 654          */
 655         .hub_status_data = ehci_hub_status_data,
 656         .hub_control = ehci_hub_control,
 657         .bus_suspend = ehci_bus_suspend,
 658         .bus_resume = ehci_bus_resume,
 659         .start_port_reset = ehci_start_port_reset,
 660         .relinquish_port = ehci_relinquish_port,
 661         .port_handed_over = ehci_port_handed_over,
 662
 663         .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
 664 };
 665
 666 static int ehci_fsl_drv_probe(struct platform_device *pdev)
 667 {
 668         if (usb_disabled())
 669                 return -ENODEV;
 670
 671         /* FIXME we only want one one probe() not two */
 672         return usb_hcd_fsl_probe(&ehci_fsl_hc_driver, pdev);
 673 }
 674
 675 static int ehci_fsl_drv_remove(struct platform_device *pdev)
 676 {
 677         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 678
 679         /* FIXME we only want one one remove() not two */
 680         usb_hcd_fsl_remove(hcd, pdev);
 681         return 0;
 682 }
 683
 684 MODULE_ALIAS("platform:fsl-ehci");
 685
 686 static struct platform_driver ehci_fsl_driver = {
 687         .probe = ehci_fsl_drv_probe,
 688         .remove = ehci_fsl_drv_remove,
 689         .shutdown = usb_hcd_platform_shutdown,
 690         .driver = {
 691                 .name = "fsl-ehci",
 692                 .pm = EHCI_FSL_PM_OPS,
 693         },
 694 };