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 = (struct fsl_usb2_platform_data *)pdev->dev.platform_data;
  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         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
 106                                 driver->description)) {
 107                 dev_dbg(&pdev->dev, "controller already in use\n");
 108                 retval = -EBUSY;
 109                 goto err2;
 110         }
 111         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
 112
 113         if (hcd->regs == NULL) {
 114                 dev_dbg(&pdev->dev, "error mapping memory\n");
 115                 retval = -EFAULT;
 116                 goto err3;
 117         }
 118
 119         pdata->regs = hcd->regs;
 120
 121         if (pdata->power_budget)
 122                 hcd->power_budget = pdata->power_budget;
 123
 124         /*
 125          * do platform specific init: check the clock, grab/config pins, etc.
 126          */
 127         if (pdata->init && pdata->init(pdev)) {
 128                 retval = -ENODEV;
 129                 goto err4;
 130         }
 131
 132         /* Enable USB controller, 83xx or 8536 */
 133         if (pdata->have_sysif_regs)
 134                 setbits32(hcd->regs + FSL_SOC_USB_CTRL, 0x4);
 135
 136         /* Don't need to set host mode here. It will be done by tdi_reset() */
 137
 138         retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
 139         if (retval != 0)
 140                 goto err4;
 141
 142 #ifdef CONFIG_USB_OTG
 143         if (pdata->operating_mode == FSL_USB2_DR_OTG) {
 144                 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 145
 146                 hcd->phy = usb_get_phy(USB_PHY_TYPE_USB2);
 147                 dev_dbg(&pdev->dev, "hcd=0x%p  ehci=0x%p, phy=0x%p\n",
 148                         hcd, ehci, hcd->phy);
 149
 150                 if (!IS_ERR_OR_NULL(hcd->phy)) {
 151                         retval = otg_set_host(hcd->phy->otg,
 152                                               &ehci_to_hcd(ehci)->self);
 153                         if (retval) {
 154                                 usb_put_phy(hcd->phy);
 155                                 goto err4;
 156                         }
 157                 } else {
 158                         dev_err(&pdev->dev, "can't find phy\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
 195         if (!IS_ERR_OR_NULL(hcd->phy)) {
 196                 otg_set_host(hcd->phy->otg, NULL);
 197                 usb_put_phy(hcd->phy);
 198         }
 199
 200         usb_remove_hcd(hcd);
 201
 202         /*
 203          * do platform specific un-initialization:
 204          * release iomux pins, disable clock, etc.
 205          */
 206         if (pdata->exit)
 207                 pdata->exit(pdev);
 208         iounmap(hcd->regs);
 209         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 210         usb_put_hcd(hcd);
 211 }
 212
 213 static int ehci_fsl_setup_phy(struct usb_hcd *hcd,
 214                                enum fsl_usb2_phy_modes phy_mode,
 215                                unsigned int port_offset)
 216 {
 217         u32 portsc;
 218         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 219         void __iomem *non_ehci = hcd->regs;
 220         struct device *dev = hcd->self.controller;
 221         struct fsl_usb2_platform_data *pdata = dev->platform_data;
 222
 223         if (pdata->controller_ver < 0) {
 224                 dev_warn(hcd->self.controller, "Could not get controller version\n");
 225                 return -ENODEV;
 226         }
 227
 228         portsc = ehci_readl(ehci, &ehci->regs->port_status[port_offset]);
 229         portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW);
 230
 231         switch (phy_mode) {
 232         case FSL_USB2_PHY_ULPI:
 233                 if (pdata->controller_ver) {
 234                         /* controller version 1.6 or above */
 235                         setbits32(non_ehci + FSL_SOC_USB_CTRL,
 236                                         ULPI_PHY_CLK_SEL);
 237                         /*
 238                          * Due to controller issue of PHY_CLK_VALID in ULPI
 239                          * mode, we set USB_CTRL_USB_EN before checking
 240                          * PHY_CLK_VALID, otherwise PHY_CLK_VALID doesn't work.
 241                          */
 242                         clrsetbits_be32(non_ehci + FSL_SOC_USB_CTRL,
 243                                         UTMI_PHY_EN, USB_CTRL_USB_EN);
 244                 }
 245                 portsc |= PORT_PTS_ULPI;
 246                 break;
 247         case FSL_USB2_PHY_SERIAL:
 248                 portsc |= PORT_PTS_SERIAL;
 249                 break;
 250         case FSL_USB2_PHY_UTMI_WIDE:
 251                 portsc |= PORT_PTS_PTW;
 252                 /* fall through */
 253         case FSL_USB2_PHY_UTMI:
 254                 if (pdata->controller_ver) {
 255                         /* controller version 1.6 or above */
 256                         setbits32(non_ehci + FSL_SOC_USB_CTRL, UTMI_PHY_EN);
 257                         mdelay(FSL_UTMI_PHY_DLY);  /* Delay for UTMI PHY CLK to
 258                                                 become stable - 10ms*/
 259                 }
 260                 /* enable UTMI PHY */
 261                 if (pdata->have_sysif_regs)
 262                         setbits32(non_ehci + FSL_SOC_USB_CTRL,
 263                                   CTRL_UTMI_PHY_EN);
 264                 portsc |= PORT_PTS_UTMI;
 265                 break;
 266         case FSL_USB2_PHY_NONE:
 267                 break;
 268         }
 269
 270         if (pdata->controller_ver && (phy_mode == FSL_USB2_PHY_ULPI)) {
 271                 /* check PHY_CLK_VALID to get phy clk valid */
 272                 if (!spin_event_timeout(in_be32(non_ehci + FSL_SOC_USB_CTRL) &
 273                                 PHY_CLK_VALID, FSL_USB_PHY_CLK_TIMEOUT, 0)) {
 274                         printk(KERN_WARNING "fsl-ehci: USB PHY clock invalid\n");
 275                         return -EINVAL;
 276                 }
 277         }
 278
 279         ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]);
 280
 281         if (phy_mode != FSL_USB2_PHY_ULPI)
 282                 setbits32(non_ehci + FSL_SOC_USB_CTRL, USB_CTRL_USB_EN);
 283
 284         return 0;
 285 }
 286
 287 static int ehci_fsl_usb_setup(struct ehci_hcd *ehci)
 288 {
 289         struct usb_hcd *hcd = ehci_to_hcd(ehci);
 290         struct fsl_usb2_platform_data *pdata;
 291         void __iomem *non_ehci = hcd->regs;
 292
 293         pdata = hcd->self.controller->platform_data;
 294
 295         if (pdata->have_sysif_regs) {
 296                 /*
 297                 * Turn on cache snooping hardware, since some PowerPC platforms
 298                 * wholly rely on hardware to deal with cache coherent
 299                 */
 300
 301                 /* Setup Snooping for all the 4GB space */
 302                 /* SNOOP1 starts from 0x0, size 2G */
 303                 out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0 | SNOOP_SIZE_2GB);
 304                 /* SNOOP2 starts from 0x80000000, size 2G */
 305                 out_be32(non_ehci + FSL_SOC_USB_SNOOP2, 0x80000000 | SNOOP_SIZE_2GB);
 306         }
 307
 308         if ((pdata->operating_mode == FSL_USB2_DR_HOST) ||
 309                         (pdata->operating_mode == FSL_USB2_DR_OTG))
 310                 if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0))
 311                         return -EINVAL;
 312
 313         if (pdata->operating_mode == FSL_USB2_MPH_HOST) {
 314                 unsigned int chip, rev, svr;
 315
 316                 svr = mfspr(SPRN_SVR);
 317                 chip = svr >> 16;
 318                 rev = (svr >> 4) & 0xf;
 319
 320                 /* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */
 321                 if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055))
 322                         ehci->has_fsl_port_bug = 1;
 323
 324                 if (pdata->port_enables & FSL_USB2_PORT0_ENABLED)
 325                         if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0))
 326                                 return -EINVAL;
 327
 328                 if (pdata->port_enables & FSL_USB2_PORT1_ENABLED)
 329                         if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 1))
 330                                 return -EINVAL;
 331         }
 332
 333         if (pdata->have_sysif_regs) {
 334 #ifdef CONFIG_FSL_SOC_BOOKE
 335                 out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x00000008);
 336                 out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000080);
 337 #else
 338                 out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x0000000c);
 339                 out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000040);
 340 #endif
 341                 out_be32(non_ehci + FSL_SOC_USB_SICTRL, 0x00000001);
 342         }
 343
 344         return 0;
 345 }
 346
 347 /* called after powerup, by probe or system-pm "wakeup" */
 348 static int ehci_fsl_reinit(struct ehci_hcd *ehci)
 349 {
 350         if (ehci_fsl_usb_setup(ehci))
 351                 return -EINVAL;
 352
 353         return 0;
 354 }
 355
 356 /* called during probe() after chip reset completes */
 357 static int ehci_fsl_setup(struct usb_hcd *hcd)
 358 {
 359         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 360         int retval;
 361         struct fsl_usb2_platform_data *pdata;
 362         struct device *dev;
 363
 364         dev = hcd->self.controller;
 365         pdata = hcd->self.controller->platform_data;
 366         ehci->big_endian_desc = pdata->big_endian_desc;
 367         ehci->big_endian_mmio = pdata->big_endian_mmio;
 368
 369         /* EHCI registers start at offset 0x100 */
 370         ehci->caps = hcd->regs + 0x100;
 371
 372         hcd->has_tt = 1;
 373
 374         retval = ehci_setup(hcd);
 375         if (retval)
 376                 return retval;
 377
 378         if (of_device_is_compatible(dev->parent->of_node,
 379                                     "fsl,mpc5121-usb2-dr")) {
 380                 /*
 381                  * set SBUSCFG:AHBBRST so that control msgs don't
 382                  * fail when doing heavy PATA writes.
 383                  */
 384                 ehci_writel(ehci, SBUSCFG_INCR8,
 385                             hcd->regs + FSL_SOC_USB_SBUSCFG);
 386         }
 387
 388         retval = ehci_fsl_reinit(ehci);
 389         return retval;
 390 }
 391
 392 struct ehci_fsl {
 393         struct ehci_hcd ehci;
 394
 395 #ifdef CONFIG_PM
 396         /* Saved USB PHY settings, need to restore after deep sleep. */
 397         u32 usb_ctrl;
 398 #endif
 399 };
 400
 401 #ifdef CONFIG_PM
 402
 403 #ifdef CONFIG_PPC_MPC512x
 404 static int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
 405 {
 406         struct usb_hcd *hcd = dev_get_drvdata(dev);
 407         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 408         struct fsl_usb2_platform_data *pdata = dev->platform_data;
 409         u32 tmp;
 410
 411 #ifdef DEBUG
 412         u32 mode = ehci_readl(ehci, hcd->regs + FSL_SOC_USB_USBMODE);
 413         mode &= USBMODE_CM_MASK;
 414         tmp = ehci_readl(ehci, hcd->regs + 0x140);      /* usbcmd */
 415
 416         dev_dbg(dev, "suspend=%d already_suspended=%d "
 417                 "mode=%d  usbcmd %08x\n", pdata->suspended,
 418                 pdata->already_suspended, mode, tmp);
 419 #endif
 420
 421         /*
 422          * If the controller is already suspended, then this must be a
 423          * PM suspend.  Remember this fact, so that we will leave the
 424          * controller suspended at PM resume time.
 425          */
 426         if (pdata->suspended) {
 427                 dev_dbg(dev, "already suspended, leaving early\n");
 428                 pdata->already_suspended = 1;
 429                 return 0;
 430         }
 431
 432         dev_dbg(dev, "suspending...\n");
 433
 434         ehci->rh_state = EHCI_RH_SUSPENDED;
 435         dev->power.power_state = PMSG_SUSPEND;
 436
 437         /* ignore non-host interrupts */
 438         clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 439
 440         /* stop the controller */
 441         tmp = ehci_readl(ehci, &ehci->regs->command);
 442         tmp &= ~CMD_RUN;
 443         ehci_writel(ehci, tmp, &ehci->regs->command);
 444
 445         /* save EHCI registers */
 446         pdata->pm_command = ehci_readl(ehci, &ehci->regs->command);
 447         pdata->pm_command &= ~CMD_RUN;
 448         pdata->pm_status  = ehci_readl(ehci, &ehci->regs->status);
 449         pdata->pm_intr_enable  = ehci_readl(ehci, &ehci->regs->intr_enable);
 450         pdata->pm_frame_index  = ehci_readl(ehci, &ehci->regs->frame_index);
 451         pdata->pm_segment  = ehci_readl(ehci, &ehci->regs->segment);
 452         pdata->pm_frame_list  = ehci_readl(ehci, &ehci->regs->frame_list);
 453         pdata->pm_async_next  = ehci_readl(ehci, &ehci->regs->async_next);
 454         pdata->pm_configured_flag  =
 455                 ehci_readl(ehci, &ehci->regs->configured_flag);
 456         pdata->pm_portsc = ehci_readl(ehci, &ehci->regs->port_status[0]);
 457         pdata->pm_usbgenctrl = ehci_readl(ehci,
 458                                           hcd->regs + FSL_SOC_USB_USBGENCTRL);
 459
 460         /* clear the W1C bits */
 461         pdata->pm_portsc &= cpu_to_hc32(ehci, ~PORT_RWC_BITS);
 462
 463         pdata->suspended = 1;
 464
 465         /* clear PP to cut power to the port */
 466         tmp = ehci_readl(ehci, &ehci->regs->port_status[0]);
 467         tmp &= ~PORT_POWER;
 468         ehci_writel(ehci, tmp, &ehci->regs->port_status[0]);
 469
 470         return 0;
 471 }
 472
 473 static int ehci_fsl_mpc512x_drv_resume(struct device *dev)
 474 {
 475         struct usb_hcd *hcd = dev_get_drvdata(dev);
 476         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 477         struct fsl_usb2_platform_data *pdata = dev->platform_data;
 478         u32 tmp;
 479
 480         dev_dbg(dev, "suspend=%d already_suspended=%d\n",
 481                 pdata->suspended, pdata->already_suspended);
 482
 483         /*
 484          * If the controller was already suspended at suspend time,
 485          * then don't resume it now.
 486          */
 487         if (pdata->already_suspended) {
 488                 dev_dbg(dev, "already suspended, leaving early\n");
 489                 pdata->already_suspended = 0;
 490                 return 0;
 491         }
 492
 493         if (!pdata->suspended) {
 494                 dev_dbg(dev, "not suspended, leaving early\n");
 495                 return 0;
 496         }
 497
 498         pdata->suspended = 0;
 499
 500         dev_dbg(dev, "resuming...\n");
 501
 502         /* set host mode */
 503         tmp = USBMODE_CM_HOST | (pdata->es ? USBMODE_ES : 0);
 504         ehci_writel(ehci, tmp, hcd->regs + FSL_SOC_USB_USBMODE);
 505
 506         ehci_writel(ehci, pdata->pm_usbgenctrl,
 507                     hcd->regs + FSL_SOC_USB_USBGENCTRL);
 508         ehci_writel(ehci, ISIPHYCTRL_PXE | ISIPHYCTRL_PHYE,
 509                     hcd->regs + FSL_SOC_USB_ISIPHYCTRL);
 510
 511         ehci_writel(ehci, SBUSCFG_INCR8, hcd->regs + FSL_SOC_USB_SBUSCFG);
 512
 513         /* restore EHCI registers */
 514         ehci_writel(ehci, pdata->pm_command, &ehci->regs->command);
 515         ehci_writel(ehci, pdata->pm_intr_enable, &ehci->regs->intr_enable);
 516         ehci_writel(ehci, pdata->pm_frame_index, &ehci->regs->frame_index);
 517         ehci_writel(ehci, pdata->pm_segment, &ehci->regs->segment);
 518         ehci_writel(ehci, pdata->pm_frame_list, &ehci->regs->frame_list);
 519         ehci_writel(ehci, pdata->pm_async_next, &ehci->regs->async_next);
 520         ehci_writel(ehci, pdata->pm_configured_flag,
 521                     &ehci->regs->configured_flag);
 522         ehci_writel(ehci, pdata->pm_portsc, &ehci->regs->port_status[0]);
 523
 524         set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 525         ehci->rh_state = EHCI_RH_RUNNING;
 526         dev->power.power_state = PMSG_ON;
 527
 528         tmp = ehci_readl(ehci, &ehci->regs->command);
 529         tmp |= CMD_RUN;
 530         ehci_writel(ehci, tmp, &ehci->regs->command);
 531
 532         usb_hcd_resume_root_hub(hcd);
 533
 534         return 0;
 535 }
 536 #else
 537 static inline int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
 538 {
 539         return 0;
 540 }
 541
 542 static inline int ehci_fsl_mpc512x_drv_resume(struct device *dev)
 543 {
 544         return 0;
 545 }
 546 #endif /* CONFIG_PPC_MPC512x */
 547
 548 static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd)
 549 {
 550         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 551
 552         return container_of(ehci, struct ehci_fsl, ehci);
 553 }
 554
 555 static int ehci_fsl_drv_suspend(struct device *dev)
 556 {
 557         struct usb_hcd *hcd = dev_get_drvdata(dev);
 558         struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
 559         void __iomem *non_ehci = hcd->regs;
 560
 561         if (of_device_is_compatible(dev->parent->of_node,
 562                                     "fsl,mpc5121-usb2-dr")) {
 563                 return ehci_fsl_mpc512x_drv_suspend(dev);
 564         }
 565
 566         ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd),
 567                         device_may_wakeup(dev));
 568         if (!fsl_deep_sleep())
 569                 return 0;
 570
 571         ehci_fsl->usb_ctrl = in_be32(non_ehci + FSL_SOC_USB_CTRL);
 572         return 0;
 573 }
 574
 575 static int ehci_fsl_drv_resume(struct device *dev)
 576 {
 577         struct usb_hcd *hcd = dev_get_drvdata(dev);
 578         struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
 579         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 580         void __iomem *non_ehci = hcd->regs;
 581
 582         if (of_device_is_compatible(dev->parent->of_node,
 583                                     "fsl,mpc5121-usb2-dr")) {
 584                 return ehci_fsl_mpc512x_drv_resume(dev);
 585         }
 586
 587         ehci_prepare_ports_for_controller_resume(ehci);
 588         if (!fsl_deep_sleep())
 589                 return 0;
 590
 591         usb_root_hub_lost_power(hcd->self.root_hub);
 592
 593         /* Restore USB PHY settings and enable the controller. */
 594         out_be32(non_ehci + FSL_SOC_USB_CTRL, ehci_fsl->usb_ctrl);
 595
 596         ehci_reset(ehci);
 597         ehci_fsl_reinit(ehci);
 598
 599         return 0;
 600 }
 601
 602 static int ehci_fsl_drv_restore(struct device *dev)
 603 {
 604         struct usb_hcd *hcd = dev_get_drvdata(dev);
 605
 606         usb_root_hub_lost_power(hcd->self.root_hub);
 607         return 0;
 608 }
 609
 610 static struct dev_pm_ops ehci_fsl_pm_ops = {
 611         .suspend = ehci_fsl_drv_suspend,
 612         .resume = ehci_fsl_drv_resume,
 613         .restore = ehci_fsl_drv_restore,
 614 };
 615
 616 #define EHCI_FSL_PM_OPS         (&ehci_fsl_pm_ops)
 617 #else
 618 #define EHCI_FSL_PM_OPS         NULL
 619 #endif /* CONFIG_PM */
 620
 621 #ifdef CONFIG_USB_OTG
 622 static int ehci_start_port_reset(struct usb_hcd *hcd, unsigned port)
 623 {
 624         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 625         u32 status;
 626
 627         if (!port)
 628                 return -EINVAL;
 629
 630         port--;
 631
 632         /* start port reset before HNP protocol time out */
 633         status = readl(&ehci->regs->port_status[port]);
 634         if (!(status & PORT_CONNECT))
 635                 return -ENODEV;
 636
 637         /* khubd will finish the reset later */
 638         if (ehci_is_TDI(ehci)) {
 639                 writel(PORT_RESET |
 640                        (status & ~(PORT_CSC | PORT_PEC | PORT_OCC)),
 641                        &ehci->regs->port_status[port]);
 642         } else {
 643                 writel(PORT_RESET, &ehci->regs->port_status[port]);
 644         }
 645
 646         return 0;
 647 }
 648 #else
 649 #define ehci_start_port_reset   NULL
 650 #endif /* CONFIG_USB_OTG */
 651
 652
 653 static const struct hc_driver ehci_fsl_hc_driver = {
 654         .description = hcd_name,
 655         .product_desc = "Freescale On-Chip EHCI Host Controller",
 656         .hcd_priv_size = sizeof(struct ehci_fsl),
 657
 658         /*
 659          * generic hardware linkage
 660          */
 661         .irq = ehci_irq,
 662         .flags = HCD_USB2 | HCD_MEMORY,
 663
 664         /*
 665          * basic lifecycle operations
 666          */
 667         .reset = ehci_fsl_setup,
 668         .start = ehci_run,
 669         .stop = ehci_stop,
 670         .shutdown = ehci_shutdown,
 671
 672         /*
 673          * managing i/o requests and associated device resources
 674          */
 675         .urb_enqueue = ehci_urb_enqueue,
 676         .urb_dequeue = ehci_urb_dequeue,
 677         .endpoint_disable = ehci_endpoint_disable,
 678         .endpoint_reset = ehci_endpoint_reset,
 679
 680         /*
 681          * scheduling support
 682          */
 683         .get_frame_number = ehci_get_frame,
 684
 685         /*
 686          * root hub support
 687          */
 688         .hub_status_data = ehci_hub_status_data,
 689         .hub_control = ehci_hub_control,
 690         .bus_suspend = ehci_bus_suspend,
 691         .bus_resume = ehci_bus_resume,
 692         .start_port_reset = ehci_start_port_reset,
 693         .relinquish_port = ehci_relinquish_port,
 694         .port_handed_over = ehci_port_handed_over,
 695
 696         .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
 697 };
 698
 699 static int ehci_fsl_drv_probe(struct platform_device *pdev)
 700 {
 701         if (usb_disabled())
 702                 return -ENODEV;
 703
 704         /* FIXME we only want one one probe() not two */
 705         return usb_hcd_fsl_probe(&ehci_fsl_hc_driver, pdev);
 706 }
 707
 708 static int ehci_fsl_drv_remove(struct platform_device *pdev)
 709 {
 710         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 711
 712         /* FIXME we only want one one remove() not two */
 713         usb_hcd_fsl_remove(hcd, pdev);
 714         return 0;
 715 }
 716
 717 MODULE_ALIAS("platform:fsl-ehci");
 718
 719 static struct platform_driver ehci_fsl_driver = {
 720         .probe = ehci_fsl_drv_probe,
 721         .remove = ehci_fsl_drv_remove,
 722         .shutdown = usb_hcd_platform_shutdown,
 723         .driver = {
 724                 .name = "fsl-ehci",
 725                 .pm = EHCI_FSL_PM_OPS,
 726         },
 727 };