linux/drivers/usb/host/ehci-fsl.c
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   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 */
  48static 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 */
 190static 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
 213static 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->have_sysif_regs && 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->have_sysif_regs && 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->have_sysif_regs && pdata->controller_ver &&
 271            (phy_mode == FSL_USB2_PHY_ULPI)) {
 272                /* check PHY_CLK_VALID to get phy clk valid */
 273                if (!spin_event_timeout(in_be32(non_ehci + FSL_SOC_USB_CTRL) &
 274                                PHY_CLK_VALID, FSL_USB_PHY_CLK_TIMEOUT, 0)) {
 275                        printk(KERN_WARNING "fsl-ehci: USB PHY clock invalid\n");
 276                        return -EINVAL;
 277                }
 278        }
 279
 280        ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]);
 281
 282        if (phy_mode != FSL_USB2_PHY_ULPI && pdata->have_sysif_regs)
 283                setbits32(non_ehci + FSL_SOC_USB_CTRL, USB_CTRL_USB_EN);
 284
 285        return 0;
 286}
 287
 288static int ehci_fsl_usb_setup(struct ehci_hcd *ehci)
 289{
 290        struct usb_hcd *hcd = ehci_to_hcd(ehci);
 291        struct fsl_usb2_platform_data *pdata;
 292        void __iomem *non_ehci = hcd->regs;
 293
 294        pdata = hcd->self.controller->platform_data;
 295
 296        if (pdata->have_sysif_regs) {
 297                /*
 298                * Turn on cache snooping hardware, since some PowerPC platforms
 299                * wholly rely on hardware to deal with cache coherent
 300                */
 301
 302                /* Setup Snooping for all the 4GB space */
 303                /* SNOOP1 starts from 0x0, size 2G */
 304                out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0 | SNOOP_SIZE_2GB);
 305                /* SNOOP2 starts from 0x80000000, size 2G */
 306                out_be32(non_ehci + FSL_SOC_USB_SNOOP2, 0x80000000 | SNOOP_SIZE_2GB);
 307        }
 308
 309        if ((pdata->operating_mode == FSL_USB2_DR_HOST) ||
 310                        (pdata->operating_mode == FSL_USB2_DR_OTG))
 311                if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0))
 312                        return -EINVAL;
 313
 314        if (pdata->operating_mode == FSL_USB2_MPH_HOST) {
 315                unsigned int chip, rev, svr;
 316
 317                svr = mfspr(SPRN_SVR);
 318                chip = svr >> 16;
 319                rev = (svr >> 4) & 0xf;
 320
 321                /* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */
 322                if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055))
 323                        ehci->has_fsl_port_bug = 1;
 324
 325                if (pdata->port_enables & FSL_USB2_PORT0_ENABLED)
 326                        if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0))
 327                                return -EINVAL;
 328
 329                if (pdata->port_enables & FSL_USB2_PORT1_ENABLED)
 330                        if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 1))
 331                                return -EINVAL;
 332        }
 333
 334        if (pdata->have_sysif_regs) {
 335#ifdef CONFIG_FSL_SOC_BOOKE
 336                out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x00000008);
 337                out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000080);
 338#else
 339                out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x0000000c);
 340                out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000040);
 341#endif
 342                out_be32(non_ehci + FSL_SOC_USB_SICTRL, 0x00000001);
 343        }
 344
 345        return 0;
 346}
 347
 348/* called after powerup, by probe or system-pm "wakeup" */
 349static int ehci_fsl_reinit(struct ehci_hcd *ehci)
 350{
 351        if (ehci_fsl_usb_setup(ehci))
 352                return -EINVAL;
 353
 354        return 0;
 355}
 356
 357/* called during probe() after chip reset completes */
 358static int ehci_fsl_setup(struct usb_hcd *hcd)
 359{
 360        struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 361        int retval;
 362        struct fsl_usb2_platform_data *pdata;
 363        struct device *dev;
 364
 365        dev = hcd->self.controller;
 366        pdata = hcd->self.controller->platform_data;
 367        ehci->big_endian_desc = pdata->big_endian_desc;
 368        ehci->big_endian_mmio = pdata->big_endian_mmio;
 369
 370        /* EHCI registers start at offset 0x100 */
 371        ehci->caps = hcd->regs + 0x100;
 372
 373        hcd->has_tt = 1;
 374
 375        retval = ehci_setup(hcd);
 376        if (retval)
 377                return retval;
 378
 379        if (of_device_is_compatible(dev->parent->of_node,
 380                                    "fsl,mpc5121-usb2-dr")) {
 381                /*
 382                 * set SBUSCFG:AHBBRST so that control msgs don't
 383                 * fail when doing heavy PATA writes.
 384                 */
 385                ehci_writel(ehci, SBUSCFG_INCR8,
 386                            hcd->regs + FSL_SOC_USB_SBUSCFG);
 387        }
 388
 389        retval = ehci_fsl_reinit(ehci);
 390        return retval;
 391}
 392
 393struct ehci_fsl {
 394        struct ehci_hcd ehci;
 395
 396#ifdef CONFIG_PM
 397        /* Saved USB PHY settings, need to restore after deep sleep. */
 398        u32 usb_ctrl;
 399#endif
 400};
 401
 402#ifdef CONFIG_PM
 403
 404#ifdef CONFIG_PPC_MPC512x
 405static int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
 406{
 407        struct usb_hcd *hcd = dev_get_drvdata(dev);
 408        struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 409        struct fsl_usb2_platform_data *pdata = dev->platform_data;
 410        u32 tmp;
 411
 412#ifdef DEBUG
 413        u32 mode = ehci_readl(ehci, hcd->regs + FSL_SOC_USB_USBMODE);
 414        mode &= USBMODE_CM_MASK;
 415        tmp = ehci_readl(ehci, hcd->regs + 0x140);      /* usbcmd */
 416
 417        dev_dbg(dev, "suspend=%d already_suspended=%d "
 418                "mode=%d  usbcmd %08x\n", pdata->suspended,
 419                pdata->already_suspended, mode, tmp);
 420#endif
 421
 422        /*
 423         * If the controller is already suspended, then this must be a
 424         * PM suspend.  Remember this fact, so that we will leave the
 425         * controller suspended at PM resume time.
 426         */
 427        if (pdata->suspended) {
 428                dev_dbg(dev, "already suspended, leaving early\n");
 429                pdata->already_suspended = 1;
 430                return 0;
 431        }
 432
 433        dev_dbg(dev, "suspending...\n");
 434
 435        ehci->rh_state = EHCI_RH_SUSPENDED;
 436        dev->power.power_state = PMSG_SUSPEND;
 437
 438        /* ignore non-host interrupts */
 439        clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 440
 441        /* stop the controller */
 442        tmp = ehci_readl(ehci, &ehci->regs->command);
 443        tmp &= ~CMD_RUN;
 444        ehci_writel(ehci, tmp, &ehci->regs->command);
 445
 446        /* save EHCI registers */
 447        pdata->pm_command = ehci_readl(ehci, &ehci->regs->command);
 448        pdata->pm_command &= ~CMD_RUN;
 449        pdata->pm_status  = ehci_readl(ehci, &ehci->regs->status);
 450        pdata->pm_intr_enable  = ehci_readl(ehci, &ehci->regs->intr_enable);
 451        pdata->pm_frame_index  = ehci_readl(ehci, &ehci->regs->frame_index);
 452        pdata->pm_segment  = ehci_readl(ehci, &ehci->regs->segment);
 453        pdata->pm_frame_list  = ehci_readl(ehci, &ehci->regs->frame_list);
 454        pdata->pm_async_next  = ehci_readl(ehci, &ehci->regs->async_next);
 455        pdata->pm_configured_flag  =
 456                ehci_readl(ehci, &ehci->regs->configured_flag);
 457        pdata->pm_portsc = ehci_readl(ehci, &ehci->regs->port_status[0]);
 458        pdata->pm_usbgenctrl = ehci_readl(ehci,
 459                                          hcd->regs + FSL_SOC_USB_USBGENCTRL);
 460
 461        /* clear the W1C bits */
 462        pdata->pm_portsc &= cpu_to_hc32(ehci, ~PORT_RWC_BITS);
 463
 464        pdata->suspended = 1;
 465
 466        /* clear PP to cut power to the port */
 467        tmp = ehci_readl(ehci, &ehci->regs->port_status[0]);
 468        tmp &= ~PORT_POWER;
 469        ehci_writel(ehci, tmp, &ehci->regs->port_status[0]);
 470
 471        return 0;
 472}
 473
 474static int ehci_fsl_mpc512x_drv_resume(struct device *dev)
 475{
 476        struct usb_hcd *hcd = dev_get_drvdata(dev);
 477        struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 478        struct fsl_usb2_platform_data *pdata = dev->platform_data;
 479        u32 tmp;
 480
 481        dev_dbg(dev, "suspend=%d already_suspended=%d\n",
 482                pdata->suspended, pdata->already_suspended);
 483
 484        /*
 485         * If the controller was already suspended at suspend time,
 486         * then don't resume it now.
 487         */
 488        if (pdata->already_suspended) {
 489                dev_dbg(dev, "already suspended, leaving early\n");
 490                pdata->already_suspended = 0;
 491                return 0;
 492        }
 493
 494        if (!pdata->suspended) {
 495                dev_dbg(dev, "not suspended, leaving early\n");
 496                return 0;
 497        }
 498
 499        pdata->suspended = 0;
 500
 501        dev_dbg(dev, "resuming...\n");
 502
 503        /* set host mode */
 504        tmp = USBMODE_CM_HOST | (pdata->es ? USBMODE_ES : 0);
 505        ehci_writel(ehci, tmp, hcd->regs + FSL_SOC_USB_USBMODE);
 506
 507        ehci_writel(ehci, pdata->pm_usbgenctrl,
 508                    hcd->regs + FSL_SOC_USB_USBGENCTRL);
 509        ehci_writel(ehci, ISIPHYCTRL_PXE | ISIPHYCTRL_PHYE,
 510                    hcd->regs + FSL_SOC_USB_ISIPHYCTRL);
 511
 512        ehci_writel(ehci, SBUSCFG_INCR8, hcd->regs + FSL_SOC_USB_SBUSCFG);
 513
 514        /* restore EHCI registers */
 515        ehci_writel(ehci, pdata->pm_command, &ehci->regs->command);
 516        ehci_writel(ehci, pdata->pm_intr_enable, &ehci->regs->intr_enable);
 517        ehci_writel(ehci, pdata->pm_frame_index, &ehci->regs->frame_index);
 518        ehci_writel(ehci, pdata->pm_segment, &ehci->regs->segment);
 519        ehci_writel(ehci, pdata->pm_frame_list, &ehci->regs->frame_list);
 520        ehci_writel(ehci, pdata->pm_async_next, &ehci->regs->async_next);
 521        ehci_writel(ehci, pdata->pm_configured_flag,
 522                    &ehci->regs->configured_flag);
 523        ehci_writel(ehci, pdata->pm_portsc, &ehci->regs->port_status[0]);
 524
 525        set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 526        ehci->rh_state = EHCI_RH_RUNNING;
 527        dev->power.power_state = PMSG_ON;
 528
 529        tmp = ehci_readl(ehci, &ehci->regs->command);
 530        tmp |= CMD_RUN;
 531        ehci_writel(ehci, tmp, &ehci->regs->command);
 532
 533        usb_hcd_resume_root_hub(hcd);
 534
 535        return 0;
 536}
 537#else
 538static inline int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
 539{
 540        return 0;
 541}
 542
 543static inline int ehci_fsl_mpc512x_drv_resume(struct device *dev)
 544{
 545        return 0;
 546}
 547#endif /* CONFIG_PPC_MPC512x */
 548
 549static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd)
 550{
 551        struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 552
 553        return container_of(ehci, struct ehci_fsl, ehci);
 554}
 555
 556static int ehci_fsl_drv_suspend(struct device *dev)
 557{
 558        struct usb_hcd *hcd = dev_get_drvdata(dev);
 559        struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
 560        void __iomem *non_ehci = hcd->regs;
 561
 562        if (of_device_is_compatible(dev->parent->of_node,
 563                                    "fsl,mpc5121-usb2-dr")) {
 564                return ehci_fsl_mpc512x_drv_suspend(dev);
 565        }
 566
 567        ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd),
 568                        device_may_wakeup(dev));
 569        if (!fsl_deep_sleep())
 570                return 0;
 571
 572        ehci_fsl->usb_ctrl = in_be32(non_ehci + FSL_SOC_USB_CTRL);
 573        return 0;
 574}
 575
 576static int ehci_fsl_drv_resume(struct device *dev)
 577{
 578        struct usb_hcd *hcd = dev_get_drvdata(dev);
 579        struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
 580        struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 581        void __iomem *non_ehci = hcd->regs;
 582
 583        if (of_device_is_compatible(dev->parent->of_node,
 584                                    "fsl,mpc5121-usb2-dr")) {
 585                return ehci_fsl_mpc512x_drv_resume(dev);
 586        }
 587
 588        ehci_prepare_ports_for_controller_resume(ehci);
 589        if (!fsl_deep_sleep())
 590                return 0;
 591
 592        usb_root_hub_lost_power(hcd->self.root_hub);
 593
 594        /* Restore USB PHY settings and enable the controller. */
 595        out_be32(non_ehci + FSL_SOC_USB_CTRL, ehci_fsl->usb_ctrl);
 596
 597        ehci_reset(ehci);
 598        ehci_fsl_reinit(ehci);
 599
 600        return 0;
 601}
 602
 603static int ehci_fsl_drv_restore(struct device *dev)
 604{
 605        struct usb_hcd *hcd = dev_get_drvdata(dev);
 606
 607        usb_root_hub_lost_power(hcd->self.root_hub);
 608        return 0;
 609}
 610
 611static struct dev_pm_ops ehci_fsl_pm_ops = {
 612        .suspend = ehci_fsl_drv_suspend,
 613        .resume = ehci_fsl_drv_resume,
 614        .restore = ehci_fsl_drv_restore,
 615};
 616
 617#define EHCI_FSL_PM_OPS         (&ehci_fsl_pm_ops)
 618#else
 619#define EHCI_FSL_PM_OPS         NULL
 620#endif /* CONFIG_PM */
 621
 622#ifdef CONFIG_USB_OTG
 623static int ehci_start_port_reset(struct usb_hcd *hcd, unsigned port)
 624{
 625        struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 626        u32 status;
 627
 628        if (!port)
 629                return -EINVAL;
 630
 631        port--;
 632
 633        /* start port reset before HNP protocol time out */
 634        status = readl(&ehci->regs->port_status[port]);
 635        if (!(status & PORT_CONNECT))
 636                return -ENODEV;
 637
 638        /* khubd will finish the reset later */
 639        if (ehci_is_TDI(ehci)) {
 640                writel(PORT_RESET |
 641                       (status & ~(PORT_CSC | PORT_PEC | PORT_OCC)),
 642                       &ehci->regs->port_status[port]);
 643        } else {
 644                writel(PORT_RESET, &ehci->regs->port_status[port]);
 645        }
 646
 647        return 0;
 648}
 649#else
 650#define ehci_start_port_reset   NULL
 651#endif /* CONFIG_USB_OTG */
 652
 653
 654static const struct hc_driver ehci_fsl_hc_driver = {
 655        .description = hcd_name,
 656        .product_desc = "Freescale On-Chip EHCI Host Controller",
 657        .hcd_priv_size = sizeof(struct ehci_fsl),
 658
 659        /*
 660         * generic hardware linkage
 661         */
 662        .irq = ehci_irq,
 663        .flags = HCD_USB2 | HCD_MEMORY,
 664
 665        /*
 666         * basic lifecycle operations
 667         */
 668        .reset = ehci_fsl_setup,
 669        .start = ehci_run,
 670        .stop = ehci_stop,
 671        .shutdown = ehci_shutdown,
 672
 673        /*
 674         * managing i/o requests and associated device resources
 675         */
 676        .urb_enqueue = ehci_urb_enqueue,
 677        .urb_dequeue = ehci_urb_dequeue,
 678        .endpoint_disable = ehci_endpoint_disable,
 679        .endpoint_reset = ehci_endpoint_reset,
 680
 681        /*
 682         * scheduling support
 683         */
 684        .get_frame_number = ehci_get_frame,
 685
 686        /*
 687         * root hub support
 688         */
 689        .hub_status_data = ehci_hub_status_data,
 690        .hub_control = ehci_hub_control,
 691        .bus_suspend = ehci_bus_suspend,
 692        .bus_resume = ehci_bus_resume,
 693        .start_port_reset = ehci_start_port_reset,
 694        .relinquish_port = ehci_relinquish_port,
 695        .port_handed_over = ehci_port_handed_over,
 696
 697        .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
 698};
 699
 700static int ehci_fsl_drv_probe(struct platform_device *pdev)
 701{
 702        if (usb_disabled())
 703                return -ENODEV;
 704
 705        /* FIXME we only want one one probe() not two */
 706        return usb_hcd_fsl_probe(&ehci_fsl_hc_driver, pdev);
 707}
 708
 709static int ehci_fsl_drv_remove(struct platform_device *pdev)
 710{
 711        struct usb_hcd *hcd = platform_get_drvdata(pdev);
 712
 713        /* FIXME we only want one one remove() not two */
 714        usb_hcd_fsl_remove(hcd, pdev);
 715        return 0;
 716}
 717
 718MODULE_ALIAS("platform:fsl-ehci");
 719
 720static struct platform_driver ehci_fsl_driver = {
 721        .probe = ehci_fsl_drv_probe,
 722        .remove = ehci_fsl_drv_remove,
 723        .shutdown = usb_hcd_platform_shutdown,
 724        .driver = {
 725                .name = "fsl-ehci",
 726                .pm = EHCI_FSL_PM_OPS,
 727        },
 728};
 729