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/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 = usb_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->otg,
 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->otg, 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 usb_hcd *hcd,
 215                                enum fsl_usb2_phy_modes phy_mode,
 216                                unsigned int port_offset)
 217 {
 218         u32 portsc, temp;
 219         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 220         void __iomem *non_ehci = hcd->regs;
 221         struct device *dev = hcd->self.controller;
 222         struct fsl_usb2_platform_data *pdata = dev->platform_data;
 223
 224         if (pdata->controller_ver < 0) {
 225                 dev_warn(hcd->self.controller, "Could not get controller version\n");
 226                 return;
 227         }
 228
 229         portsc = ehci_readl(ehci, &ehci->regs->port_status[port_offset]);
 230         portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW);
 231
 232         switch (phy_mode) {
 233         case FSL_USB2_PHY_ULPI:
 234                 if (pdata->controller_ver) {
 235                         /* controller version 1.6 or above */
 236                         temp = in_be32(non_ehci + FSL_SOC_USB_CTRL);
 237                         out_be32(non_ehci + FSL_SOC_USB_CTRL, temp |
 238                                 USB_CTRL_USB_EN | ULPI_PHY_CLK_SEL);
 239                 }
 240                 portsc |= PORT_PTS_ULPI;
 241                 break;
 242         case FSL_USB2_PHY_SERIAL:
 243                 portsc |= PORT_PTS_SERIAL;
 244                 break;
 245         case FSL_USB2_PHY_UTMI_WIDE:
 246                 portsc |= PORT_PTS_PTW;
 247                 /* fall through */
 248         case FSL_USB2_PHY_UTMI:
 249                 if (pdata->controller_ver) {
 250                         /* controller version 1.6 or above */
 251                         temp = in_be32(non_ehci + FSL_SOC_USB_CTRL);
 252                         out_be32(non_ehci + FSL_SOC_USB_CTRL, temp |
 253                                 UTMI_PHY_EN | USB_CTRL_USB_EN);
 254                         mdelay(FSL_UTMI_PHY_DLY);  /* Delay for UTMI PHY CLK to
 255                                                 become stable - 10ms*/
 256                 }
 257                 /* enable UTMI PHY */
 258                 if (pdata->have_sysif_regs)
 259                         setbits32(non_ehci + FSL_SOC_USB_CTRL,
 260                                   CTRL_UTMI_PHY_EN);
 261                 portsc |= PORT_PTS_UTMI;
 262                 break;
 263         case FSL_USB2_PHY_NONE:
 264                 break;
 265         }
 266         ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]);
 267 }
 268
 269 static void ehci_fsl_usb_setup(struct ehci_hcd *ehci)
 270 {
 271         struct usb_hcd *hcd = ehci_to_hcd(ehci);
 272         struct fsl_usb2_platform_data *pdata;
 273         void __iomem *non_ehci = hcd->regs;
 274         u32 temp;
 275
 276         pdata = hcd->self.controller->platform_data;
 277
 278         /* Enable PHY interface in the control reg. */
 279         if (pdata->have_sysif_regs) {
 280                 temp = in_be32(non_ehci + FSL_SOC_USB_CTRL);
 281                 out_be32(non_ehci + FSL_SOC_USB_CTRL, temp | 0x00000004);
 282
 283                 /*
 284                 * Turn on cache snooping hardware, since some PowerPC platforms
 285                 * wholly rely on hardware to deal with cache coherent
 286                 */
 287
 288                 /* Setup Snooping for all the 4GB space */
 289                 /* SNOOP1 starts from 0x0, size 2G */
 290                 out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0 | SNOOP_SIZE_2GB);
 291                 /* SNOOP2 starts from 0x80000000, size 2G */
 292                 out_be32(non_ehci + FSL_SOC_USB_SNOOP2, 0x80000000 | SNOOP_SIZE_2GB);
 293         }
 294
 295         if ((pdata->operating_mode == FSL_USB2_DR_HOST) ||
 296                         (pdata->operating_mode == FSL_USB2_DR_OTG))
 297                 ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0);
 298
 299         if (pdata->operating_mode == FSL_USB2_MPH_HOST) {
 300                 unsigned int chip, rev, svr;
 301
 302                 svr = mfspr(SPRN_SVR);
 303                 chip = svr >> 16;
 304                 rev = (svr >> 4) & 0xf;
 305
 306                 /* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */
 307                 if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055))
 308                         ehci->has_fsl_port_bug = 1;
 309
 310                 if (pdata->port_enables & FSL_USB2_PORT0_ENABLED)
 311                         ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0);
 312                 if (pdata->port_enables & FSL_USB2_PORT1_ENABLED)
 313                         ehci_fsl_setup_phy(hcd, pdata->phy_mode, 1);
 314         }
 315
 316         if (pdata->have_sysif_regs) {
 317 #ifdef CONFIG_PPC_85xx
 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
 328 /* called after powerup, by probe or system-pm "wakeup" */
 329 static int ehci_fsl_reinit(struct ehci_hcd *ehci)
 330 {
 331         ehci_fsl_usb_setup(ehci);
 332         ehci_port_power(ehci, 0);
 333
 334         return 0;
 335 }
 336
 337 /* called during probe() after chip reset completes */
 338 static int ehci_fsl_setup(struct usb_hcd *hcd)
 339 {
 340         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 341         int retval;
 342         struct fsl_usb2_platform_data *pdata;
 343         struct device *dev;
 344
 345         dev = hcd->self.controller;
 346         pdata = hcd->self.controller->platform_data;
 347         ehci->big_endian_desc = pdata->big_endian_desc;
 348         ehci->big_endian_mmio = pdata->big_endian_mmio;
 349
 350         /* EHCI registers start at offset 0x100 */
 351         ehci->caps = hcd->regs + 0x100;
 352         ehci->regs = hcd->regs + 0x100 +
 353                 HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
 354         dbg_hcs_params(ehci, "reset");
 355         dbg_hcc_params(ehci, "reset");
 356
 357         /* cache this readonly data; minimize chip reads */
 358         ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
 359
 360         hcd->has_tt = 1;
 361
 362         retval = ehci_halt(ehci);
 363         if (retval)
 364                 return retval;
 365
 366         /* data structure init */
 367         retval = ehci_init(hcd);
 368         if (retval)
 369                 return retval;
 370
 371         ehci->sbrn = 0x20;
 372
 373         ehci_reset(ehci);
 374
 375         if (of_device_is_compatible(dev->parent->of_node,
 376                                     "fsl,mpc5121-usb2-dr")) {
 377                 /*
 378                  * set SBUSCFG:AHBBRST so that control msgs don't
 379                  * fail when doing heavy PATA writes.
 380                  */
 381                 ehci_writel(ehci, SBUSCFG_INCR8,
 382                             hcd->regs + FSL_SOC_USB_SBUSCFG);
 383         }
 384
 385         retval = ehci_fsl_reinit(ehci);
 386         return retval;
 387 }
 388
 389 struct ehci_fsl {
 390         struct ehci_hcd ehci;
 391
 392 #ifdef CONFIG_PM
 393         /* Saved USB PHY settings, need to restore after deep sleep. */
 394         u32 usb_ctrl;
 395 #endif
 396 };
 397
 398 #ifdef CONFIG_PM
 399
 400 #ifdef CONFIG_PPC_MPC512x
 401 static int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
 402 {
 403         struct usb_hcd *hcd = dev_get_drvdata(dev);
 404         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 405         struct fsl_usb2_platform_data *pdata = dev->platform_data;
 406         u32 tmp;
 407
 408 #ifdef DEBUG
 409         u32 mode = ehci_readl(ehci, hcd->regs + FSL_SOC_USB_USBMODE);
 410         mode &= USBMODE_CM_MASK;
 411         tmp = ehci_readl(ehci, hcd->regs + 0x140);      /* usbcmd */
 412
 413         dev_dbg(dev, "suspend=%d already_suspended=%d "
 414                 "mode=%d  usbcmd %08x\n", pdata->suspended,
 415                 pdata->already_suspended, mode, tmp);
 416 #endif
 417
 418         /*
 419          * If the controller is already suspended, then this must be a
 420          * PM suspend.  Remember this fact, so that we will leave the
 421          * controller suspended at PM resume time.
 422          */
 423         if (pdata->suspended) {
 424                 dev_dbg(dev, "already suspended, leaving early\n");
 425                 pdata->already_suspended = 1;
 426                 return 0;
 427         }
 428
 429         dev_dbg(dev, "suspending...\n");
 430
 431         ehci->rh_state = EHCI_RH_SUSPENDED;
 432         dev->power.power_state = PMSG_SUSPEND;
 433
 434         /* ignore non-host interrupts */
 435         clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 436
 437         /* stop the controller */
 438         tmp = ehci_readl(ehci, &ehci->regs->command);
 439         tmp &= ~CMD_RUN;
 440         ehci_writel(ehci, tmp, &ehci->regs->command);
 441
 442         /* save EHCI registers */
 443         pdata->pm_command = ehci_readl(ehci, &ehci->regs->command);
 444         pdata->pm_command &= ~CMD_RUN;
 445         pdata->pm_status  = ehci_readl(ehci, &ehci->regs->status);
 446         pdata->pm_intr_enable  = ehci_readl(ehci, &ehci->regs->intr_enable);
 447         pdata->pm_frame_index  = ehci_readl(ehci, &ehci->regs->frame_index);
 448         pdata->pm_segment  = ehci_readl(ehci, &ehci->regs->segment);
 449         pdata->pm_frame_list  = ehci_readl(ehci, &ehci->regs->frame_list);
 450         pdata->pm_async_next  = ehci_readl(ehci, &ehci->regs->async_next);
 451         pdata->pm_configured_flag  =
 452                 ehci_readl(ehci, &ehci->regs->configured_flag);
 453         pdata->pm_portsc = ehci_readl(ehci, &ehci->regs->port_status[0]);
 454         pdata->pm_usbgenctrl = ehci_readl(ehci,
 455                                           hcd->regs + FSL_SOC_USB_USBGENCTRL);
 456
 457         /* clear the W1C bits */
 458         pdata->pm_portsc &= cpu_to_hc32(ehci, ~PORT_RWC_BITS);
 459
 460         pdata->suspended = 1;
 461
 462         /* clear PP to cut power to the port */
 463         tmp = ehci_readl(ehci, &ehci->regs->port_status[0]);
 464         tmp &= ~PORT_POWER;
 465         ehci_writel(ehci, tmp, &ehci->regs->port_status[0]);
 466
 467         return 0;
 468 }
 469
 470 static int ehci_fsl_mpc512x_drv_resume(struct device *dev)
 471 {
 472         struct usb_hcd *hcd = dev_get_drvdata(dev);
 473         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 474         struct fsl_usb2_platform_data *pdata = dev->platform_data;
 475         u32 tmp;
 476
 477         dev_dbg(dev, "suspend=%d already_suspended=%d\n",
 478                 pdata->suspended, pdata->already_suspended);
 479
 480         /*
 481          * If the controller was already suspended at suspend time,
 482          * then don't resume it now.
 483          */
 484         if (pdata->already_suspended) {
 485                 dev_dbg(dev, "already suspended, leaving early\n");
 486                 pdata->already_suspended = 0;
 487                 return 0;
 488         }
 489
 490         if (!pdata->suspended) {
 491                 dev_dbg(dev, "not suspended, leaving early\n");
 492                 return 0;
 493         }
 494
 495         pdata->suspended = 0;
 496
 497         dev_dbg(dev, "resuming...\n");
 498
 499         /* set host mode */
 500         tmp = USBMODE_CM_HOST | (pdata->es ? USBMODE_ES : 0);
 501         ehci_writel(ehci, tmp, hcd->regs + FSL_SOC_USB_USBMODE);
 502
 503         ehci_writel(ehci, pdata->pm_usbgenctrl,
 504                     hcd->regs + FSL_SOC_USB_USBGENCTRL);
 505         ehci_writel(ehci, ISIPHYCTRL_PXE | ISIPHYCTRL_PHYE,
 506                     hcd->regs + FSL_SOC_USB_ISIPHYCTRL);
 507
 508         ehci_writel(ehci, SBUSCFG_INCR8, hcd->regs + FSL_SOC_USB_SBUSCFG);
 509
 510         /* restore EHCI registers */
 511         ehci_writel(ehci, pdata->pm_command, &ehci->regs->command);
 512         ehci_writel(ehci, pdata->pm_intr_enable, &ehci->regs->intr_enable);
 513         ehci_writel(ehci, pdata->pm_frame_index, &ehci->regs->frame_index);
 514         ehci_writel(ehci, pdata->pm_segment, &ehci->regs->segment);
 515         ehci_writel(ehci, pdata->pm_frame_list, &ehci->regs->frame_list);
 516         ehci_writel(ehci, pdata->pm_async_next, &ehci->regs->async_next);
 517         ehci_writel(ehci, pdata->pm_configured_flag,
 518                     &ehci->regs->configured_flag);
 519         ehci_writel(ehci, pdata->pm_portsc, &ehci->regs->port_status[0]);
 520
 521         set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 522         ehci->rh_state = EHCI_RH_RUNNING;
 523         dev->power.power_state = PMSG_ON;
 524
 525         tmp = ehci_readl(ehci, &ehci->regs->command);
 526         tmp |= CMD_RUN;
 527         ehci_writel(ehci, tmp, &ehci->regs->command);
 528
 529         usb_hcd_resume_root_hub(hcd);
 530
 531         return 0;
 532 }
 533 #else
 534 static inline int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
 535 {
 536         return 0;
 537 }
 538
 539 static inline int ehci_fsl_mpc512x_drv_resume(struct device *dev)
 540 {
 541         return 0;
 542 }
 543 #endif /* CONFIG_PPC_MPC512x */
 544
 545 static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd)
 546 {
 547         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 548
 549         return container_of(ehci, struct ehci_fsl, ehci);
 550 }
 551
 552 static int ehci_fsl_drv_suspend(struct device *dev)
 553 {
 554         struct usb_hcd *hcd = dev_get_drvdata(dev);
 555         struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
 556         void __iomem *non_ehci = hcd->regs;
 557
 558         if (of_device_is_compatible(dev->parent->of_node,
 559                                     "fsl,mpc5121-usb2-dr")) {
 560                 return ehci_fsl_mpc512x_drv_suspend(dev);
 561         }
 562
 563         ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd),
 564                         device_may_wakeup(dev));
 565         if (!fsl_deep_sleep())
 566                 return 0;
 567
 568         ehci_fsl->usb_ctrl = in_be32(non_ehci + FSL_SOC_USB_CTRL);
 569         return 0;
 570 }
 571
 572 static int ehci_fsl_drv_resume(struct device *dev)
 573 {
 574         struct usb_hcd *hcd = dev_get_drvdata(dev);
 575         struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
 576         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 577         void __iomem *non_ehci = hcd->regs;
 578
 579         if (of_device_is_compatible(dev->parent->of_node,
 580                                     "fsl,mpc5121-usb2-dr")) {
 581                 return ehci_fsl_mpc512x_drv_resume(dev);
 582         }
 583
 584         ehci_prepare_ports_for_controller_resume(ehci);
 585         if (!fsl_deep_sleep())
 586                 return 0;
 587
 588         usb_root_hub_lost_power(hcd->self.root_hub);
 589
 590         /* Restore USB PHY settings and enable the controller. */
 591         out_be32(non_ehci + FSL_SOC_USB_CTRL, ehci_fsl->usb_ctrl);
 592
 593         ehci_reset(ehci);
 594         ehci_fsl_reinit(ehci);
 595
 596         return 0;
 597 }
 598
 599 static int ehci_fsl_drv_restore(struct device *dev)
 600 {
 601         struct usb_hcd *hcd = dev_get_drvdata(dev);
 602
 603         usb_root_hub_lost_power(hcd->self.root_hub);
 604         return 0;
 605 }
 606
 607 static struct dev_pm_ops ehci_fsl_pm_ops = {
 608         .suspend = ehci_fsl_drv_suspend,
 609         .resume = ehci_fsl_drv_resume,
 610         .restore = ehci_fsl_drv_restore,
 611 };
 612
 613 #define EHCI_FSL_PM_OPS         (&ehci_fsl_pm_ops)
 614 #else
 615 #define EHCI_FSL_PM_OPS         NULL
 616 #endif /* CONFIG_PM */
 617
 618 #ifdef CONFIG_USB_OTG
 619 static int ehci_start_port_reset(struct usb_hcd *hcd, unsigned port)
 620 {
 621         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 622         u32 status;
 623
 624         if (!port)
 625                 return -EINVAL;
 626
 627         port--;
 628
 629         /* start port reset before HNP protocol time out */
 630         status = readl(&ehci->regs->port_status[port]);
 631         if (!(status & PORT_CONNECT))
 632                 return -ENODEV;
 633
 634         /* khubd will finish the reset later */
 635         if (ehci_is_TDI(ehci)) {
 636                 writel(PORT_RESET |
 637                        (status & ~(PORT_CSC | PORT_PEC | PORT_OCC)),
 638                        &ehci->regs->port_status[port]);
 639         } else {
 640                 writel(PORT_RESET, &ehci->regs->port_status[port]);
 641         }
 642
 643         return 0;
 644 }
 645 #else
 646 #define ehci_start_port_reset   NULL
 647 #endif /* CONFIG_USB_OTG */
 648
 649
 650 static const struct hc_driver ehci_fsl_hc_driver = {
 651         .description = hcd_name,
 652         .product_desc = "Freescale On-Chip EHCI Host Controller",
 653         .hcd_priv_size = sizeof(struct ehci_fsl),
 654
 655         /*
 656          * generic hardware linkage
 657          */
 658         .irq = ehci_irq,
 659         .flags = HCD_USB2 | HCD_MEMORY,
 660
 661         /*
 662          * basic lifecycle operations
 663          */
 664         .reset = ehci_fsl_setup,
 665         .start = ehci_run,
 666         .stop = ehci_stop,
 667         .shutdown = ehci_shutdown,
 668
 669         /*
 670          * managing i/o requests and associated device resources
 671          */
 672         .urb_enqueue = ehci_urb_enqueue,
 673         .urb_dequeue = ehci_urb_dequeue,
 674         .endpoint_disable = ehci_endpoint_disable,
 675         .endpoint_reset = ehci_endpoint_reset,
 676
 677         /*
 678          * scheduling support
 679          */
 680         .get_frame_number = ehci_get_frame,
 681
 682         /*
 683          * root hub support
 684          */
 685         .hub_status_data = ehci_hub_status_data,
 686         .hub_control = ehci_hub_control,
 687         .bus_suspend = ehci_bus_suspend,
 688         .bus_resume = ehci_bus_resume,
 689         .start_port_reset = ehci_start_port_reset,
 690         .relinquish_port = ehci_relinquish_port,
 691         .port_handed_over = ehci_port_handed_over,
 692
 693         .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
 694 };
 695
 696 static int ehci_fsl_drv_probe(struct platform_device *pdev)
 697 {
 698         if (usb_disabled())
 699                 return -ENODEV;
 700
 701         /* FIXME we only want one one probe() not two */
 702         return usb_hcd_fsl_probe(&ehci_fsl_hc_driver, pdev);
 703 }
 704
 705 static int ehci_fsl_drv_remove(struct platform_device *pdev)
 706 {
 707         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 708
 709         /* FIXME we only want one one remove() not two */
 710         usb_hcd_fsl_remove(hcd, pdev);
 711         return 0;
 712 }
 713
 714 MODULE_ALIAS("platform:fsl-ehci");
 715
 716 static struct platform_driver ehci_fsl_driver = {
 717         .probe = ehci_fsl_drv_probe,
 718         .remove = ehci_fsl_drv_remove,
 719         .shutdown = usb_hcd_platform_shutdown,
 720         .driver = {
 721                 .name = "fsl-ehci",
 722                 .pm = EHCI_FSL_PM_OPS,
 723         },
 724 };