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                                 usb_put_transceiver(ehci->transceiver);
 154                                 goto err4;
 155                         }
 156                 } else {
 157                         dev_err(&pdev->dev, "can't find transceiver\n");
 158                         retval = -ENODEV;
 159                         goto err4;
 160                 }
 161         }
 162 #endif
 163         return retval;
 164
 165       err4:
 166         iounmap(hcd->regs);
 167       err3:
 168         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 169       err2:
 170         usb_put_hcd(hcd);
 171       err1:
 172         dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), retval);
 173         if (pdata->exit)
 174                 pdata->exit(pdev);
 175         return retval;
 176 }
 177
 178 /* may be called without controller electrically present */
 179 /* may be called with controller, bus, and devices active */
 180
 181 /**
 182  * usb_hcd_fsl_remove - shutdown processing for FSL-based HCDs
 183  * @dev: USB Host Controller being removed
 184  * Context: !in_interrupt()
 185  *
 186  * Reverses the effect of usb_hcd_fsl_probe().
 187  *
 188  */
 189 static void usb_hcd_fsl_remove(struct usb_hcd *hcd,
 190                                struct platform_device *pdev)
 191 {
 192         struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
 193         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 194
 195         if (ehci->transceiver) {
 196                 otg_set_host(ehci->transceiver->otg, NULL);
 197                 usb_put_transceiver(ehci->transceiver);
 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 void 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, temp;
 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;
 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                         temp = in_be32(non_ehci + FSL_SOC_USB_CTRL);
 236                         out_be32(non_ehci + FSL_SOC_USB_CTRL, temp |
 237                                 USB_CTRL_USB_EN | ULPI_PHY_CLK_SEL);
 238                 }
 239                 portsc |= PORT_PTS_ULPI;
 240                 break;
 241         case FSL_USB2_PHY_SERIAL:
 242                 portsc |= PORT_PTS_SERIAL;
 243                 break;
 244         case FSL_USB2_PHY_UTMI_WIDE:
 245                 portsc |= PORT_PTS_PTW;
 246                 /* fall through */
 247         case FSL_USB2_PHY_UTMI:
 248                 if (pdata->controller_ver) {
 249                         /* controller version 1.6 or above */
 250                         temp = in_be32(non_ehci + FSL_SOC_USB_CTRL);
 251                         out_be32(non_ehci + FSL_SOC_USB_CTRL, temp |
 252                                 UTMI_PHY_EN | USB_CTRL_USB_EN);
 253                         mdelay(FSL_UTMI_PHY_DLY);  /* Delay for UTMI PHY CLK to
 254                                                 become stable - 10ms*/
 255                 }
 256                 /* enable UTMI PHY */
 257                 if (pdata->have_sysif_regs)
 258                         setbits32(non_ehci + FSL_SOC_USB_CTRL,
 259                                   CTRL_UTMI_PHY_EN);
 260                 portsc |= PORT_PTS_UTMI;
 261                 break;
 262         case FSL_USB2_PHY_NONE:
 263                 break;
 264         }
 265         ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]);
 266 }
 267
 268 static void ehci_fsl_usb_setup(struct ehci_hcd *ehci)
 269 {
 270         struct usb_hcd *hcd = ehci_to_hcd(ehci);
 271         struct fsl_usb2_platform_data *pdata;
 272         void __iomem *non_ehci = hcd->regs;
 273         u32 temp;
 274
 275         pdata = hcd->self.controller->platform_data;
 276
 277         /* Enable PHY interface in the control reg. */
 278         if (pdata->have_sysif_regs) {
 279                 temp = in_be32(non_ehci + FSL_SOC_USB_CTRL);
 280                 out_be32(non_ehci + FSL_SOC_USB_CTRL, temp | 0x00000004);
 281
 282                 /*
 283                 * Turn on cache snooping hardware, since some PowerPC platforms
 284                 * wholly rely on hardware to deal with cache coherent
 285                 */
 286
 287                 /* Setup Snooping for all the 4GB space */
 288                 /* SNOOP1 starts from 0x0, size 2G */
 289                 out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0 | SNOOP_SIZE_2GB);
 290                 /* SNOOP2 starts from 0x80000000, size 2G */
 291                 out_be32(non_ehci + FSL_SOC_USB_SNOOP2, 0x80000000 | SNOOP_SIZE_2GB);
 292         }
 293
 294         if ((pdata->operating_mode == FSL_USB2_DR_HOST) ||
 295                         (pdata->operating_mode == FSL_USB2_DR_OTG))
 296                 ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0);
 297
 298         if (pdata->operating_mode == FSL_USB2_MPH_HOST) {
 299                 unsigned int chip, rev, svr;
 300
 301                 svr = mfspr(SPRN_SVR);
 302                 chip = svr >> 16;
 303                 rev = (svr >> 4) & 0xf;
 304
 305                 /* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */
 306                 if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055))
 307                         ehci->has_fsl_port_bug = 1;
 308
 309                 if (pdata->port_enables & FSL_USB2_PORT0_ENABLED)
 310                         ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0);
 311                 if (pdata->port_enables & FSL_USB2_PORT1_ENABLED)
 312                         ehci_fsl_setup_phy(hcd, pdata->phy_mode, 1);
 313         }
 314
 315         if (pdata->have_sysif_regs) {
 316 #ifdef CONFIG_PPC_85xx
 317                 out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x00000008);
 318                 out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000080);
 319 #else
 320                 out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x0000000c);
 321                 out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000040);
 322 #endif
 323                 out_be32(non_ehci + FSL_SOC_USB_SICTRL, 0x00000001);
 324         }
 325 }
 326
 327 /* called after powerup, by probe or system-pm "wakeup" */
 328 static int ehci_fsl_reinit(struct ehci_hcd *ehci)
 329 {
 330         ehci_fsl_usb_setup(ehci);
 331         ehci_port_power(ehci, 0);
 332
 333         return 0;
 334 }
 335
 336 /* called during probe() after chip reset completes */
 337 static int ehci_fsl_setup(struct usb_hcd *hcd)
 338 {
 339         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 340         int retval;
 341         struct fsl_usb2_platform_data *pdata;
 342         struct device *dev;
 343
 344         dev = hcd->self.controller;
 345         pdata = hcd->self.controller->platform_data;
 346         ehci->big_endian_desc = pdata->big_endian_desc;
 347         ehci->big_endian_mmio = pdata->big_endian_mmio;
 348
 349         /* EHCI registers start at offset 0x100 */
 350         ehci->caps = hcd->regs + 0x100;
 351         ehci->regs = hcd->regs + 0x100 +
 352                 HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
 353         dbg_hcs_params(ehci, "reset");
 354         dbg_hcc_params(ehci, "reset");
 355
 356         /* cache this readonly data; minimize chip reads */
 357         ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
 358
 359         hcd->has_tt = 1;
 360
 361         retval = ehci_halt(ehci);
 362         if (retval)
 363                 return retval;
 364
 365         /* data structure init */
 366         retval = ehci_init(hcd);
 367         if (retval)
 368                 return retval;
 369
 370         ehci->sbrn = 0x20;
 371
 372         ehci_reset(ehci);
 373
 374         if (of_device_is_compatible(dev->parent->of_node,
 375                                     "fsl,mpc5121-usb2-dr")) {
 376                 /*
 377                  * set SBUSCFG:AHBBRST so that control msgs don't
 378                  * fail when doing heavy PATA writes.
 379                  */
 380                 ehci_writel(ehci, SBUSCFG_INCR8,
 381                             hcd->regs + FSL_SOC_USB_SBUSCFG);
 382         }
 383
 384         retval = ehci_fsl_reinit(ehci);
 385         return retval;
 386 }
 387
 388 struct ehci_fsl {
 389         struct ehci_hcd ehci;
 390
 391 #ifdef CONFIG_PM
 392         /* Saved USB PHY settings, need to restore after deep sleep. */
 393         u32 usb_ctrl;
 394 #endif
 395 };
 396
 397 #ifdef CONFIG_PM
 398
 399 #ifdef CONFIG_PPC_MPC512x
 400 static int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
 401 {
 402         struct usb_hcd *hcd = dev_get_drvdata(dev);
 403         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 404         struct fsl_usb2_platform_data *pdata = dev->platform_data;
 405         u32 tmp;
 406
 407 #ifdef DEBUG
 408         u32 mode = ehci_readl(ehci, hcd->regs + FSL_SOC_USB_USBMODE);
 409         mode &= USBMODE_CM_MASK;
 410         tmp = ehci_readl(ehci, hcd->regs + 0x140);      /* usbcmd */
 411
 412         dev_dbg(dev, "suspend=%d already_suspended=%d "
 413                 "mode=%d  usbcmd %08x\n", pdata->suspended,
 414                 pdata->already_suspended, mode, tmp);
 415 #endif
 416
 417         /*
 418          * If the controller is already suspended, then this must be a
 419          * PM suspend.  Remember this fact, so that we will leave the
 420          * controller suspended at PM resume time.
 421          */
 422         if (pdata->suspended) {
 423                 dev_dbg(dev, "already suspended, leaving early\n");
 424                 pdata->already_suspended = 1;
 425                 return 0;
 426         }
 427
 428         dev_dbg(dev, "suspending...\n");
 429
 430         ehci->rh_state = EHCI_RH_SUSPENDED;
 431         dev->power.power_state = PMSG_SUSPEND;
 432
 433         /* ignore non-host interrupts */
 434         clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 435
 436         /* stop the controller */
 437         tmp = ehci_readl(ehci, &ehci->regs->command);
 438         tmp &= ~CMD_RUN;
 439         ehci_writel(ehci, tmp, &ehci->regs->command);
 440
 441         /* save EHCI registers */
 442         pdata->pm_command = ehci_readl(ehci, &ehci->regs->command);
 443         pdata->pm_command &= ~CMD_RUN;
 444         pdata->pm_status  = ehci_readl(ehci, &ehci->regs->status);
 445         pdata->pm_intr_enable  = ehci_readl(ehci, &ehci->regs->intr_enable);
 446         pdata->pm_frame_index  = ehci_readl(ehci, &ehci->regs->frame_index);
 447         pdata->pm_segment  = ehci_readl(ehci, &ehci->regs->segment);
 448         pdata->pm_frame_list  = ehci_readl(ehci, &ehci->regs->frame_list);
 449         pdata->pm_async_next  = ehci_readl(ehci, &ehci->regs->async_next);
 450         pdata->pm_configured_flag  =
 451                 ehci_readl(ehci, &ehci->regs->configured_flag);
 452         pdata->pm_portsc = ehci_readl(ehci, &ehci->regs->port_status[0]);
 453         pdata->pm_usbgenctrl = ehci_readl(ehci,
 454                                           hcd->regs + FSL_SOC_USB_USBGENCTRL);
 455
 456         /* clear the W1C bits */
 457         pdata->pm_portsc &= cpu_to_hc32(ehci, ~PORT_RWC_BITS);
 458
 459         pdata->suspended = 1;
 460
 461         /* clear PP to cut power to the port */
 462         tmp = ehci_readl(ehci, &ehci->regs->port_status[0]);
 463         tmp &= ~PORT_POWER;
 464         ehci_writel(ehci, tmp, &ehci->regs->port_status[0]);
 465
 466         return 0;
 467 }
 468
 469 static int ehci_fsl_mpc512x_drv_resume(struct device *dev)
 470 {
 471         struct usb_hcd *hcd = dev_get_drvdata(dev);
 472         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 473         struct fsl_usb2_platform_data *pdata = dev->platform_data;
 474         u32 tmp;
 475
 476         dev_dbg(dev, "suspend=%d already_suspended=%d\n",
 477                 pdata->suspended, pdata->already_suspended);
 478
 479         /*
 480          * If the controller was already suspended at suspend time,
 481          * then don't resume it now.
 482          */
 483         if (pdata->already_suspended) {
 484                 dev_dbg(dev, "already suspended, leaving early\n");
 485                 pdata->already_suspended = 0;
 486                 return 0;
 487         }
 488
 489         if (!pdata->suspended) {
 490                 dev_dbg(dev, "not suspended, leaving early\n");
 491                 return 0;
 492         }
 493
 494         pdata->suspended = 0;
 495
 496         dev_dbg(dev, "resuming...\n");
 497
 498         /* set host mode */
 499         tmp = USBMODE_CM_HOST | (pdata->es ? USBMODE_ES : 0);
 500         ehci_writel(ehci, tmp, hcd->regs + FSL_SOC_USB_USBMODE);
 501
 502         ehci_writel(ehci, pdata->pm_usbgenctrl,
 503                     hcd->regs + FSL_SOC_USB_USBGENCTRL);
 504         ehci_writel(ehci, ISIPHYCTRL_PXE | ISIPHYCTRL_PHYE,
 505                     hcd->regs + FSL_SOC_USB_ISIPHYCTRL);
 506
 507         ehci_writel(ehci, SBUSCFG_INCR8, hcd->regs + FSL_SOC_USB_SBUSCFG);
 508
 509         /* restore EHCI registers */
 510         ehci_writel(ehci, pdata->pm_command, &ehci->regs->command);
 511         ehci_writel(ehci, pdata->pm_intr_enable, &ehci->regs->intr_enable);
 512         ehci_writel(ehci, pdata->pm_frame_index, &ehci->regs->frame_index);
 513         ehci_writel(ehci, pdata->pm_segment, &ehci->regs->segment);
 514         ehci_writel(ehci, pdata->pm_frame_list, &ehci->regs->frame_list);
 515         ehci_writel(ehci, pdata->pm_async_next, &ehci->regs->async_next);
 516         ehci_writel(ehci, pdata->pm_configured_flag,
 517                     &ehci->regs->configured_flag);
 518         ehci_writel(ehci, pdata->pm_portsc, &ehci->regs->port_status[0]);
 519
 520         set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 521         ehci->rh_state = EHCI_RH_RUNNING;
 522         dev->power.power_state = PMSG_ON;
 523
 524         tmp = ehci_readl(ehci, &ehci->regs->command);
 525         tmp |= CMD_RUN;
 526         ehci_writel(ehci, tmp, &ehci->regs->command);
 527
 528         usb_hcd_resume_root_hub(hcd);
 529
 530         return 0;
 531 }
 532 #else
 533 static inline int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
 534 {
 535         return 0;
 536 }
 537
 538 static inline int ehci_fsl_mpc512x_drv_resume(struct device *dev)
 539 {
 540         return 0;
 541 }
 542 #endif /* CONFIG_PPC_MPC512x */
 543
 544 static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd)
 545 {
 546         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 547
 548         return container_of(ehci, struct ehci_fsl, ehci);
 549 }
 550
 551 static int ehci_fsl_drv_suspend(struct device *dev)
 552 {
 553         struct usb_hcd *hcd = dev_get_drvdata(dev);
 554         struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
 555         void __iomem *non_ehci = hcd->regs;
 556
 557         if (of_device_is_compatible(dev->parent->of_node,
 558                                     "fsl,mpc5121-usb2-dr")) {
 559                 return ehci_fsl_mpc512x_drv_suspend(dev);
 560         }
 561
 562         ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd),
 563                         device_may_wakeup(dev));
 564         if (!fsl_deep_sleep())
 565                 return 0;
 566
 567         ehci_fsl->usb_ctrl = in_be32(non_ehci + FSL_SOC_USB_CTRL);
 568         return 0;
 569 }
 570
 571 static int ehci_fsl_drv_resume(struct device *dev)
 572 {
 573         struct usb_hcd *hcd = dev_get_drvdata(dev);
 574         struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
 575         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 576         void __iomem *non_ehci = hcd->regs;
 577
 578         if (of_device_is_compatible(dev->parent->of_node,
 579                                     "fsl,mpc5121-usb2-dr")) {
 580                 return ehci_fsl_mpc512x_drv_resume(dev);
 581         }
 582
 583         ehci_prepare_ports_for_controller_resume(ehci);
 584         if (!fsl_deep_sleep())
 585                 return 0;
 586
 587         usb_root_hub_lost_power(hcd->self.root_hub);
 588
 589         /* Restore USB PHY settings and enable the controller. */
 590         out_be32(non_ehci + FSL_SOC_USB_CTRL, ehci_fsl->usb_ctrl);
 591
 592         ehci_reset(ehci);
 593         ehci_fsl_reinit(ehci);
 594
 595         return 0;
 596 }
 597
 598 static int ehci_fsl_drv_restore(struct device *dev)
 599 {
 600         struct usb_hcd *hcd = dev_get_drvdata(dev);
 601
 602         usb_root_hub_lost_power(hcd->self.root_hub);
 603         return 0;
 604 }
 605
 606 static struct dev_pm_ops ehci_fsl_pm_ops = {
 607         .suspend = ehci_fsl_drv_suspend,
 608         .resume = ehci_fsl_drv_resume,
 609         .restore = ehci_fsl_drv_restore,
 610 };
 611
 612 #define EHCI_FSL_PM_OPS         (&ehci_fsl_pm_ops)
 613 #else
 614 #define EHCI_FSL_PM_OPS         NULL
 615 #endif /* CONFIG_PM */
 616
 617 #ifdef CONFIG_USB_OTG
 618 static int ehci_start_port_reset(struct usb_hcd *hcd, unsigned port)
 619 {
 620         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 621         u32 status;
 622
 623         if (!port)
 624                 return -EINVAL;
 625
 626         port--;
 627
 628         /* start port reset before HNP protocol time out */
 629         status = readl(&ehci->regs->port_status[port]);
 630         if (!(status & PORT_CONNECT))
 631                 return -ENODEV;
 632
 633         /* khubd will finish the reset later */
 634         if (ehci_is_TDI(ehci)) {
 635                 writel(PORT_RESET |
 636                        (status & ~(PORT_CSC | PORT_PEC | PORT_OCC)),
 637                        &ehci->regs->port_status[port]);
 638         } else {
 639                 writel(PORT_RESET, &ehci->regs->port_status[port]);
 640         }
 641
 642         return 0;
 643 }
 644 #else
 645 #define ehci_start_port_reset   NULL
 646 #endif /* CONFIG_USB_OTG */
 647
 648
 649 static const struct hc_driver ehci_fsl_hc_driver = {
 650         .description = hcd_name,
 651         .product_desc = "Freescale On-Chip EHCI Host Controller",
 652         .hcd_priv_size = sizeof(struct ehci_fsl),
 653
 654         /*
 655          * generic hardware linkage
 656          */
 657         .irq = ehci_irq,
 658         .flags = HCD_USB2 | HCD_MEMORY,
 659
 660         /*
 661          * basic lifecycle operations
 662          */
 663         .reset = ehci_fsl_setup,
 664         .start = ehci_run,
 665         .stop = ehci_stop,
 666         .shutdown = ehci_shutdown,
 667
 668         /*
 669          * managing i/o requests and associated device resources
 670          */
 671         .urb_enqueue = ehci_urb_enqueue,
 672         .urb_dequeue = ehci_urb_dequeue,
 673         .endpoint_disable = ehci_endpoint_disable,
 674         .endpoint_reset = ehci_endpoint_reset,
 675
 676         /*
 677          * scheduling support
 678          */
 679         .get_frame_number = ehci_get_frame,
 680
 681         /*
 682          * root hub support
 683          */
 684         .hub_status_data = ehci_hub_status_data,
 685         .hub_control = ehci_hub_control,
 686         .bus_suspend = ehci_bus_suspend,
 687         .bus_resume = ehci_bus_resume,
 688         .start_port_reset = ehci_start_port_reset,
 689         .relinquish_port = ehci_relinquish_port,
 690         .port_handed_over = ehci_port_handed_over,
 691
 692         .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
 693 };
 694
 695 static int ehci_fsl_drv_probe(struct platform_device *pdev)
 696 {
 697         if (usb_disabled())
 698                 return -ENODEV;
 699
 700         /* FIXME we only want one one probe() not two */
 701         return usb_hcd_fsl_probe(&ehci_fsl_hc_driver, pdev);
 702 }
 703
 704 static int ehci_fsl_drv_remove(struct platform_device *pdev)
 705 {
 706         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 707
 708         /* FIXME we only want one one remove() not two */
 709         usb_hcd_fsl_remove(hcd, pdev);
 710         return 0;
 711 }
 712
 713 MODULE_ALIAS("platform:fsl-ehci");
 714
 715 static struct platform_driver ehci_fsl_driver = {
 716         .probe = ehci_fsl_drv_probe,
 717         .remove = ehci_fsl_drv_remove,
 718         .shutdown = usb_hcd_platform_shutdown,
 719         .driver = {
 720                 .name = "fsl-ehci",
 721                 .pm = EHCI_FSL_PM_OPS,
 722         },
 723 };