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