drivers/usb/host/ehci-fsl.c

   1 /*
   2  * Copyright 2005-2009 MontaVista Software, Inc.
   3  * Copyright 2008,2012      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/err.h>
  31 #include <linux/platform_device.h>
  32 #include <linux/fsl_devices.h>
  33
  34 #include "ehci-fsl.h"
  35
  36 /* configure so an HC device and id are always provided */
  37 /* always called with process context; sleeping is OK */
  38
  39 /**
  40  * usb_hcd_fsl_probe - initialize FSL-based HCDs
  41  * @drvier: Driver to be used for this HCD
  42  * @pdev: USB Host Controller being probed
  43  * Context: !in_interrupt()
  44  *
  45  * Allocates basic resources for this USB host controller.
  46  *
  47  */
  48 static int usb_hcd_fsl_probe(const struct hc_driver *driver,
  49                              struct platform_device *pdev)
  50 {
  51         struct fsl_usb2_platform_data *pdata;
  52         struct usb_hcd *hcd;
  53         struct resource *res;
  54         int irq;
  55         int retval;
  56
  57         pr_debug("initializing FSL-SOC USB Controller\n");
  58
  59         /* Need platform data for setup */
  60         pdata = dev_get_platdata(&pdev->dev);
  61         if (!pdata) {
  62                 dev_err(&pdev->dev,
  63                         "No platform data for %s.\n", dev_name(&pdev->dev));
  64                 return -ENODEV;
  65         }
  66
  67         /*
  68          * This is a host mode driver, verify that we're supposed to be
  69          * in host mode.
  70          */
  71         if (!((pdata->operating_mode == FSL_USB2_DR_HOST) ||
  72               (pdata->operating_mode == FSL_USB2_MPH_HOST) ||
  73               (pdata->operating_mode == FSL_USB2_DR_OTG))) {
  74                 dev_err(&pdev->dev,
  75                         "Non Host Mode configured for %s. Wrong driver linked.\n",
  76                         dev_name(&pdev->dev));
  77                 return -ENODEV;
  78         }
  79
  80         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
  81         if (!res) {
  82                 dev_err(&pdev->dev,
  83                         "Found HC with no IRQ. Check %s setup!\n",
  84                         dev_name(&pdev->dev));
  85                 return -ENODEV;
  86         }
  87         irq = res->start;
  88
  89         hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
  90         if (!hcd) {
  91                 retval = -ENOMEM;
  92                 goto err1;
  93         }
  94
  95         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  96         if (!res) {
  97                 dev_err(&pdev->dev,
  98                         "Found HC with no register addr. Check %s setup!\n",
  99                         dev_name(&pdev->dev));
 100                 retval = -ENODEV;
 101                 goto err2;
 102         }
 103         hcd->rsrc_start = res->start;
 104         hcd->rsrc_len = resource_size(res);
 105         hcd->regs = devm_ioremap_resource(&pdev->dev, res);
 106         if (IS_ERR(hcd->regs)) {
 107                 retval = PTR_ERR(hcd->regs);
 108                 goto err2;
 109         }
 110
 111         pdata->regs = hcd->regs;
 112
 113         if (pdata->power_budget)
 114                 hcd->power_budget = pdata->power_budget;
 115
 116         /*
 117          * do platform specific init: check the clock, grab/config pins, etc.
 118          */
 119         if (pdata->init && pdata->init(pdev)) {
 120                 retval = -ENODEV;
 121                 goto err2;
 122         }
 123
 124         /* Enable USB controller, 83xx or 8536 */
 125         if (pdata->have_sysif_regs && pdata->controller_ver < FSL_USB_VER_1_6)
 126                 setbits32(hcd->regs + FSL_SOC_USB_CTRL, 0x4);
 127
 128         /* Don't need to set host mode here. It will be done by tdi_reset() */
 129
 130         retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
 131         if (retval != 0)
 132                 goto err2;
 133         device_wakeup_enable(hcd->self.controller);
 134
 135 #ifdef CONFIG_USB_OTG
 136         if (pdata->operating_mode == FSL_USB2_DR_OTG) {
 137                 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 138
 139                 hcd->phy = usb_get_phy(USB_PHY_TYPE_USB2);
 140                 dev_dbg(&pdev->dev, "hcd=0x%p  ehci=0x%p, phy=0x%p\n",
 141                         hcd, ehci, hcd->phy);
 142
 143                 if (!IS_ERR_OR_NULL(hcd->phy)) {
 144                         retval = otg_set_host(hcd->phy->otg,
 145                                               &ehci_to_hcd(ehci)->self);
 146                         if (retval) {
 147                                 usb_put_phy(hcd->phy);
 148                                 goto err2;
 149                         }
 150                 } else {
 151                         dev_err(&pdev->dev, "can't find phy\n");
 152                         retval = -ENODEV;
 153                         goto err2;
 154                 }
 155         }
 156 #endif
 157         return retval;
 158
 159       err2:
 160         usb_put_hcd(hcd);
 161       err1:
 162         dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), retval);
 163         if (pdata->exit)
 164                 pdata->exit(pdev);
 165         return retval;
 166 }
 167
 168 /* may be called without controller electrically present */
 169 /* may be called with controller, bus, and devices active */
 170
 171 /**
 172  * usb_hcd_fsl_remove - shutdown processing for FSL-based HCDs
 173  * @dev: USB Host Controller being removed
 174  * Context: !in_interrupt()
 175  *
 176  * Reverses the effect of usb_hcd_fsl_probe().
 177  *
 178  */
 179 static void usb_hcd_fsl_remove(struct usb_hcd *hcd,
 180                                struct platform_device *pdev)
 181 {
 182         struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
 183
 184         if (!IS_ERR_OR_NULL(hcd->phy)) {
 185                 otg_set_host(hcd->phy->otg, NULL);
 186                 usb_put_phy(hcd->phy);
 187         }
 188
 189         usb_remove_hcd(hcd);
 190
 191         /*
 192          * do platform specific un-initialization:
 193          * release iomux pins, disable clock, etc.
 194          */
 195         if (pdata->exit)
 196                 pdata->exit(pdev);
 197         usb_put_hcd(hcd);
 198 }
 199
 200 static int ehci_fsl_setup_phy(struct usb_hcd *hcd,
 201                                enum fsl_usb2_phy_modes phy_mode,
 202                                unsigned int port_offset)
 203 {
 204         u32 portsc;
 205         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 206         void __iomem *non_ehci = hcd->regs;
 207         struct device *dev = hcd->self.controller;
 208         struct fsl_usb2_platform_data *pdata = dev_get_platdata(dev);
 209
 210         if (pdata->controller_ver < 0) {
 211                 dev_warn(hcd->self.controller, "Could not get controller version\n");
 212                 return -ENODEV;
 213         }
 214
 215         portsc = ehci_readl(ehci, &ehci->regs->port_status[port_offset]);
 216         portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW);
 217
 218         switch (phy_mode) {
 219         case FSL_USB2_PHY_ULPI:
 220                 if (pdata->have_sysif_regs && pdata->controller_ver) {
 221                         /* controller version 1.6 or above */
 222                         clrbits32(non_ehci + FSL_SOC_USB_CTRL, UTMI_PHY_EN);
 223                         setbits32(non_ehci + FSL_SOC_USB_CTRL,
 224                                 ULPI_PHY_CLK_SEL | USB_CTRL_USB_EN);
 225                 }
 226                 portsc |= PORT_PTS_ULPI;
 227                 break;
 228         case FSL_USB2_PHY_SERIAL:
 229                 portsc |= PORT_PTS_SERIAL;
 230                 break;
 231         case FSL_USB2_PHY_UTMI_WIDE:
 232                 portsc |= PORT_PTS_PTW;
 233                 /* fall through */
 234         case FSL_USB2_PHY_UTMI:
 235                 if (pdata->have_sysif_regs && pdata->controller_ver) {
 236                         /* controller version 1.6 or above */
 237                         setbits32(non_ehci + FSL_SOC_USB_CTRL, UTMI_PHY_EN);
 238                         mdelay(FSL_UTMI_PHY_DLY);  /* Delay for UTMI PHY CLK to
 239                                                 become stable - 10ms*/
 240                 }
 241                 /* enable UTMI PHY */
 242                 if (pdata->have_sysif_regs)
 243                         setbits32(non_ehci + FSL_SOC_USB_CTRL,
 244                                   CTRL_UTMI_PHY_EN);
 245                 portsc |= PORT_PTS_UTMI;
 246                 break;
 247         case FSL_USB2_PHY_NONE:
 248                 break;
 249         }
 250
 251         if (pdata->have_sysif_regs && pdata->controller_ver &&
 252             (phy_mode == FSL_USB2_PHY_ULPI)) {
 253                 /* check PHY_CLK_VALID to get phy clk valid */
 254                 if (!(spin_event_timeout(in_be32(non_ehci + FSL_SOC_USB_CTRL) &
 255                                 PHY_CLK_VALID, FSL_USB_PHY_CLK_TIMEOUT, 0) ||
 256                                 in_be32(non_ehci + FSL_SOC_USB_PRICTRL))) {
 257                         dev_warn(hcd->self.controller, "USB PHY clock invalid\n");
 258                         return -EINVAL;
 259                 }
 260         }
 261
 262         ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]);
 263
 264         if (phy_mode != FSL_USB2_PHY_ULPI && pdata->have_sysif_regs)
 265                 setbits32(non_ehci + FSL_SOC_USB_CTRL, USB_CTRL_USB_EN);
 266
 267         return 0;
 268 }
 269
 270 static int ehci_fsl_usb_setup(struct ehci_hcd *ehci)
 271 {
 272         struct usb_hcd *hcd = ehci_to_hcd(ehci);
 273         struct fsl_usb2_platform_data *pdata;
 274         void __iomem *non_ehci = hcd->regs;
 275
 276         pdata = dev_get_platdata(hcd->self.controller);
 277
 278         if (pdata->have_sysif_regs) {
 279                 /*
 280                 * Turn on cache snooping hardware, since some PowerPC platforms
 281                 * wholly rely on hardware to deal with cache coherent
 282                 */
 283
 284                 /* Setup Snooping for all the 4GB space */
 285                 /* SNOOP1 starts from 0x0, size 2G */
 286                 out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0 | SNOOP_SIZE_2GB);
 287                 /* SNOOP2 starts from 0x80000000, size 2G */
 288                 out_be32(non_ehci + FSL_SOC_USB_SNOOP2, 0x80000000 | SNOOP_SIZE_2GB);
 289         }
 290
 291         if ((pdata->operating_mode == FSL_USB2_DR_HOST) ||
 292                         (pdata->operating_mode == FSL_USB2_DR_OTG))
 293                 if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0))
 294                         return -EINVAL;
 295
 296         if (pdata->operating_mode == FSL_USB2_MPH_HOST) {
 297                 unsigned int chip, rev, svr;
 298
 299                 svr = mfspr(SPRN_SVR);
 300                 chip = svr >> 16;
 301                 rev = (svr >> 4) & 0xf;
 302
 303                 /* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */
 304                 if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055))
 305                         ehci->has_fsl_port_bug = 1;
 306
 307                 if (pdata->port_enables & FSL_USB2_PORT0_ENABLED)
 308                         if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0))
 309                                 return -EINVAL;
 310
 311                 if (pdata->port_enables & FSL_USB2_PORT1_ENABLED)
 312                         if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 1))
 313                                 return -EINVAL;
 314         }
 315
 316         if (pdata->have_sysif_regs) {
 317 #ifdef CONFIG_FSL_SOC_BOOKE
 318                 out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x00000008);
 319                 out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000080);
 320 #else
 321                 out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x0000000c);
 322                 out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000040);
 323 #endif
 324                 out_be32(non_ehci + FSL_SOC_USB_SICTRL, 0x00000001);
 325         }
 326
 327         return 0;
 328 }
 329
 330 /* called after powerup, by probe or system-pm "wakeup" */
 331 static int ehci_fsl_reinit(struct ehci_hcd *ehci)
 332 {
 333         if (ehci_fsl_usb_setup(ehci))
 334                 return -EINVAL;
 335
 336         return 0;
 337 }
 338
 339 /* called during probe() after chip reset completes */
 340 static int ehci_fsl_setup(struct usb_hcd *hcd)
 341 {
 342         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 343         int retval;
 344         struct fsl_usb2_platform_data *pdata;
 345         struct device *dev;
 346
 347         dev = hcd->self.controller;
 348         pdata = dev_get_platdata(hcd->self.controller);
 349         ehci->big_endian_desc = pdata->big_endian_desc;
 350         ehci->big_endian_mmio = pdata->big_endian_mmio;
 351
 352         /* EHCI registers start at offset 0x100 */
 353         ehci->caps = hcd->regs + 0x100;
 354
 355 #ifdef CONFIG_PPC_83xx
 356         /*
 357          * Deal with MPC834X that need port power to be cycled after the power
 358          * fault condition is removed. Otherwise the state machine does not
 359          * reflect PORTSC[CSC] correctly.
 360          */
 361         ehci->need_oc_pp_cycle = 1;
 362 #endif
 363
 364         hcd->has_tt = 1;
 365
 366         retval = ehci_setup(hcd);
 367         if (retval)
 368                 return retval;
 369
 370         if (of_device_is_compatible(dev->parent->of_node,
 371                                     "fsl,mpc5121-usb2-dr")) {
 372                 /*
 373                  * set SBUSCFG:AHBBRST so that control msgs don't
 374                  * fail when doing heavy PATA writes.
 375                  */
 376                 ehci_writel(ehci, SBUSCFG_INCR8,
 377                             hcd->regs + FSL_SOC_USB_SBUSCFG);
 378         }
 379
 380         retval = ehci_fsl_reinit(ehci);
 381         return retval;
 382 }
 383
 384 struct ehci_fsl {
 385         struct ehci_hcd ehci;
 386
 387 #ifdef CONFIG_PM
 388         /* Saved USB PHY settings, need to restore after deep sleep. */
 389         u32 usb_ctrl;
 390 #endif
 391 };
 392
 393 #ifdef CONFIG_PM
 394
 395 #ifdef CONFIG_PPC_MPC512x
 396 static int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
 397 {
 398         struct usb_hcd *hcd = dev_get_drvdata(dev);
 399         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 400         struct fsl_usb2_platform_data *pdata = dev_get_platdata(dev);
 401         u32 tmp;
 402
 403 #ifdef CONFIG_DYNAMIC_DEBUG
 404         u32 mode = ehci_readl(ehci, hcd->regs + FSL_SOC_USB_USBMODE);
 405         mode &= USBMODE_CM_MASK;
 406         tmp = ehci_readl(ehci, hcd->regs + 0x140);      /* usbcmd */
 407
 408         dev_dbg(dev, "suspend=%d already_suspended=%d "
 409                 "mode=%d  usbcmd %08x\n", pdata->suspended,
 410                 pdata->already_suspended, mode, tmp);
 411 #endif
 412
 413         /*
 414          * If the controller is already suspended, then this must be a
 415          * PM suspend.  Remember this fact, so that we will leave the
 416          * controller suspended at PM resume time.
 417          */
 418         if (pdata->suspended) {
 419                 dev_dbg(dev, "already suspended, leaving early\n");
 420                 pdata->already_suspended = 1;
 421                 return 0;
 422         }
 423
 424         dev_dbg(dev, "suspending...\n");
 425
 426         ehci->rh_state = EHCI_RH_SUSPENDED;
 427         dev->power.power_state = PMSG_SUSPEND;
 428
 429         /* ignore non-host interrupts */
 430         clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 431
 432         /* stop the controller */
 433         tmp = ehci_readl(ehci, &ehci->regs->command);
 434         tmp &= ~CMD_RUN;
 435         ehci_writel(ehci, tmp, &ehci->regs->command);
 436
 437         /* save EHCI registers */
 438         pdata->pm_command = ehci_readl(ehci, &ehci->regs->command);
 439         pdata->pm_command &= ~CMD_RUN;
 440         pdata->pm_status  = ehci_readl(ehci, &ehci->regs->status);
 441         pdata->pm_intr_enable  = ehci_readl(ehci, &ehci->regs->intr_enable);
 442         pdata->pm_frame_index  = ehci_readl(ehci, &ehci->regs->frame_index);
 443         pdata->pm_segment  = ehci_readl(ehci, &ehci->regs->segment);
 444         pdata->pm_frame_list  = ehci_readl(ehci, &ehci->regs->frame_list);
 445         pdata->pm_async_next  = ehci_readl(ehci, &ehci->regs->async_next);
 446         pdata->pm_configured_flag  =
 447                 ehci_readl(ehci, &ehci->regs->configured_flag);
 448         pdata->pm_portsc = ehci_readl(ehci, &ehci->regs->port_status[0]);
 449         pdata->pm_usbgenctrl = ehci_readl(ehci,
 450                                           hcd->regs + FSL_SOC_USB_USBGENCTRL);
 451
 452         /* clear the W1C bits */
 453         pdata->pm_portsc &= cpu_to_hc32(ehci, ~PORT_RWC_BITS);
 454
 455         pdata->suspended = 1;
 456
 457         /* clear PP to cut power to the port */
 458         tmp = ehci_readl(ehci, &ehci->regs->port_status[0]);
 459         tmp &= ~PORT_POWER;
 460         ehci_writel(ehci, tmp, &ehci->regs->port_status[0]);
 461
 462         return 0;
 463 }
 464
 465 static int ehci_fsl_mpc512x_drv_resume(struct device *dev)
 466 {
 467         struct usb_hcd *hcd = dev_get_drvdata(dev);
 468         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 469         struct fsl_usb2_platform_data *pdata = dev_get_platdata(dev);
 470         u32 tmp;
 471
 472         dev_dbg(dev, "suspend=%d already_suspended=%d\n",
 473                 pdata->suspended, pdata->already_suspended);
 474
 475         /*
 476          * If the controller was already suspended at suspend time,
 477          * then don't resume it now.
 478          */
 479         if (pdata->already_suspended) {
 480                 dev_dbg(dev, "already suspended, leaving early\n");
 481                 pdata->already_suspended = 0;
 482                 return 0;
 483         }
 484
 485         if (!pdata->suspended) {
 486                 dev_dbg(dev, "not suspended, leaving early\n");
 487                 return 0;
 488         }
 489
 490         pdata->suspended = 0;
 491
 492         dev_dbg(dev, "resuming...\n");
 493
 494         /* set host mode */
 495         tmp = USBMODE_CM_HOST | (pdata->es ? USBMODE_ES : 0);
 496         ehci_writel(ehci, tmp, hcd->regs + FSL_SOC_USB_USBMODE);
 497
 498         ehci_writel(ehci, pdata->pm_usbgenctrl,
 499                     hcd->regs + FSL_SOC_USB_USBGENCTRL);
 500         ehci_writel(ehci, ISIPHYCTRL_PXE | ISIPHYCTRL_PHYE,
 501                     hcd->regs + FSL_SOC_USB_ISIPHYCTRL);
 502
 503         ehci_writel(ehci, SBUSCFG_INCR8, hcd->regs + FSL_SOC_USB_SBUSCFG);
 504
 505         /* restore EHCI registers */
 506         ehci_writel(ehci, pdata->pm_command, &ehci->regs->command);
 507         ehci_writel(ehci, pdata->pm_intr_enable, &ehci->regs->intr_enable);
 508         ehci_writel(ehci, pdata->pm_frame_index, &ehci->regs->frame_index);
 509         ehci_writel(ehci, pdata->pm_segment, &ehci->regs->segment);
 510         ehci_writel(ehci, pdata->pm_frame_list, &ehci->regs->frame_list);
 511         ehci_writel(ehci, pdata->pm_async_next, &ehci->regs->async_next);
 512         ehci_writel(ehci, pdata->pm_configured_flag,
 513                     &ehci->regs->configured_flag);
 514         ehci_writel(ehci, pdata->pm_portsc, &ehci->regs->port_status[0]);
 515
 516         set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 517         ehci->rh_state = EHCI_RH_RUNNING;
 518         dev->power.power_state = PMSG_ON;
 519
 520         tmp = ehci_readl(ehci, &ehci->regs->command);
 521         tmp |= CMD_RUN;
 522         ehci_writel(ehci, tmp, &ehci->regs->command);
 523
 524         usb_hcd_resume_root_hub(hcd);
 525
 526         return 0;
 527 }
 528 #else
 529 static inline int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
 530 {
 531         return 0;
 532 }
 533
 534 static inline int ehci_fsl_mpc512x_drv_resume(struct device *dev)
 535 {
 536         return 0;
 537 }
 538 #endif /* CONFIG_PPC_MPC512x */
 539
 540 static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd)
 541 {
 542         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 543
 544         return container_of(ehci, struct ehci_fsl, ehci);
 545 }
 546
 547 static int ehci_fsl_drv_suspend(struct device *dev)
 548 {
 549         struct usb_hcd *hcd = dev_get_drvdata(dev);
 550         struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
 551         void __iomem *non_ehci = hcd->regs;
 552
 553         if (of_device_is_compatible(dev->parent->of_node,
 554                                     "fsl,mpc5121-usb2-dr")) {
 555                 return ehci_fsl_mpc512x_drv_suspend(dev);
 556         }
 557
 558         ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd),
 559                         device_may_wakeup(dev));
 560         if (!fsl_deep_sleep())
 561                 return 0;
 562
 563         ehci_fsl->usb_ctrl = in_be32(non_ehci + FSL_SOC_USB_CTRL);
 564         return 0;
 565 }
 566
 567 static int ehci_fsl_drv_resume(struct device *dev)
 568 {
 569         struct usb_hcd *hcd = dev_get_drvdata(dev);
 570         struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
 571         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 572         void __iomem *non_ehci = hcd->regs;
 573
 574         if (of_device_is_compatible(dev->parent->of_node,
 575                                     "fsl,mpc5121-usb2-dr")) {
 576                 return ehci_fsl_mpc512x_drv_resume(dev);
 577         }
 578
 579         ehci_prepare_ports_for_controller_resume(ehci);
 580         if (!fsl_deep_sleep())
 581                 return 0;
 582
 583         usb_root_hub_lost_power(hcd->self.root_hub);
 584
 585         /* Restore USB PHY settings and enable the controller. */
 586         out_be32(non_ehci + FSL_SOC_USB_CTRL, ehci_fsl->usb_ctrl);
 587
 588         ehci_reset(ehci);
 589         ehci_fsl_reinit(ehci);
 590
 591         return 0;
 592 }
 593
 594 static int ehci_fsl_drv_restore(struct device *dev)
 595 {
 596         struct usb_hcd *hcd = dev_get_drvdata(dev);
 597
 598         usb_root_hub_lost_power(hcd->self.root_hub);
 599         return 0;
 600 }
 601
 602 static struct dev_pm_ops ehci_fsl_pm_ops = {
 603         .suspend = ehci_fsl_drv_suspend,
 604         .resume = ehci_fsl_drv_resume,
 605         .restore = ehci_fsl_drv_restore,
 606 };
 607
 608 #define EHCI_FSL_PM_OPS         (&ehci_fsl_pm_ops)
 609 #else
 610 #define EHCI_FSL_PM_OPS         NULL
 611 #endif /* CONFIG_PM */
 612
 613 #ifdef CONFIG_USB_OTG
 614 static int ehci_start_port_reset(struct usb_hcd *hcd, unsigned port)
 615 {
 616         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 617         u32 status;
 618
 619         if (!port)
 620                 return -EINVAL;
 621
 622         port--;
 623
 624         /* start port reset before HNP protocol time out */
 625         status = readl(&ehci->regs->port_status[port]);
 626         if (!(status & PORT_CONNECT))
 627                 return -ENODEV;
 628
 629         /* khubd will finish the reset later */
 630         if (ehci_is_TDI(ehci)) {
 631                 writel(PORT_RESET |
 632                        (status & ~(PORT_CSC | PORT_PEC | PORT_OCC)),
 633                        &ehci->regs->port_status[port]);
 634         } else {
 635                 writel(PORT_RESET, &ehci->regs->port_status[port]);
 636         }
 637
 638         return 0;
 639 }
 640 #else
 641 #define ehci_start_port_reset   NULL
 642 #endif /* CONFIG_USB_OTG */
 643
 644
 645 static const struct hc_driver ehci_fsl_hc_driver = {
 646         .description = hcd_name,
 647         .product_desc = "Freescale On-Chip EHCI Host Controller",
 648         .hcd_priv_size = sizeof(struct ehci_fsl),
 649
 650         /*
 651          * generic hardware linkage
 652          */
 653         .irq = ehci_irq,
 654         .flags = HCD_USB2 | HCD_MEMORY | HCD_BH,
 655
 656         /*
 657          * basic lifecycle operations
 658          */
 659         .reset = ehci_fsl_setup,
 660         .start = ehci_run,
 661         .stop = ehci_stop,
 662         .shutdown = ehci_shutdown,
 663
 664         /*
 665          * managing i/o requests and associated device resources
 666          */
 667         .urb_enqueue = ehci_urb_enqueue,
 668         .urb_dequeue = ehci_urb_dequeue,
 669         .endpoint_disable = ehci_endpoint_disable,
 670         .endpoint_reset = ehci_endpoint_reset,
 671
 672         /*
 673          * scheduling support
 674          */
 675         .get_frame_number = ehci_get_frame,
 676
 677         /*
 678          * root hub support
 679          */
 680         .hub_status_data = ehci_hub_status_data,
 681         .hub_control = ehci_hub_control,
 682         .bus_suspend = ehci_bus_suspend,
 683         .bus_resume = ehci_bus_resume,
 684         .start_port_reset = ehci_start_port_reset,
 685         .relinquish_port = ehci_relinquish_port,
 686         .port_handed_over = ehci_port_handed_over,
 687
 688         .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
 689 };
 690
 691 static int ehci_fsl_drv_probe(struct platform_device *pdev)
 692 {
 693         if (usb_disabled())
 694                 return -ENODEV;
 695
 696         /* FIXME we only want one one probe() not two */
 697         return usb_hcd_fsl_probe(&ehci_fsl_hc_driver, pdev);
 698 }
 699
 700 static int ehci_fsl_drv_remove(struct platform_device *pdev)
 701 {
 702         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 703
 704         /* FIXME we only want one one remove() not two */
 705         usb_hcd_fsl_remove(hcd, pdev);
 706         return 0;
 707 }
 708
 709 MODULE_ALIAS("platform:fsl-ehci");
 710
 711 static struct platform_driver ehci_fsl_driver = {
 712         .probe = ehci_fsl_drv_probe,
 713         .remove = ehci_fsl_drv_remove,
 714         .shutdown = usb_hcd_platform_shutdown,
 715         .driver = {
 716                 .name = "fsl-ehci",
 717                 .owner  = THIS_MODULE,
 718                 .pm = EHCI_FSL_PM_OPS,
 719         },
 720 };