drivers/usb/host/ehci-fsl.c

   1 /*
   2  * Copyright 2005-2009 MontaVista Software, Inc.
   3  * Copyright 2008      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 = otg_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,
 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, 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 ehci_hcd *ehci,
 215                                enum fsl_usb2_phy_modes phy_mode,
 216                                unsigned int port_offset)
 217 {
 218         u32 portsc;
 219         struct usb_hcd *hcd = ehci_to_hcd(ehci);
 220         void __iomem *non_ehci = hcd->regs;
 221
 222         portsc = ehci_readl(ehci, &ehci->regs->port_status[port_offset]);
 223         portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW);
 224
 225         switch (phy_mode) {
 226         case FSL_USB2_PHY_ULPI:
 227                 portsc |= PORT_PTS_ULPI;
 228                 break;
 229         case FSL_USB2_PHY_SERIAL:
 230                 portsc |= PORT_PTS_SERIAL;
 231                 break;
 232         case FSL_USB2_PHY_UTMI_WIDE:
 233                 portsc |= PORT_PTS_PTW;
 234                 /* fall through */
 235         case FSL_USB2_PHY_UTMI:
 236                 /* enable UTMI PHY */
 237                 setbits32(non_ehci + FSL_SOC_USB_CTRL, CTRL_UTMI_PHY_EN);
 238                 portsc |= PORT_PTS_UTMI;
 239                 break;
 240         case FSL_USB2_PHY_NONE:
 241                 break;
 242         }
 243         ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]);
 244 }
 245
 246 static void ehci_fsl_usb_setup(struct ehci_hcd *ehci)
 247 {
 248         struct usb_hcd *hcd = ehci_to_hcd(ehci);
 249         struct fsl_usb2_platform_data *pdata;
 250         void __iomem *non_ehci = hcd->regs;
 251         u32 temp;
 252
 253         pdata = hcd->self.controller->platform_data;
 254
 255         /* Enable PHY interface in the control reg. */
 256         if (pdata->have_sysif_regs) {
 257                 temp = in_be32(non_ehci + FSL_SOC_USB_CTRL);
 258                 out_be32(non_ehci + FSL_SOC_USB_CTRL, temp | 0x00000004);
 259                 out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0000001b);
 260         }
 261
 262 #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE)
 263         /*
 264          * Turn on cache snooping hardware, since some PowerPC platforms
 265          * wholly rely on hardware to deal with cache coherent
 266          */
 267
 268         /* Setup Snooping for all the 4GB space */
 269         /* SNOOP1 starts from 0x0, size 2G */
 270         out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0 | SNOOP_SIZE_2GB);
 271         /* SNOOP2 starts from 0x80000000, size 2G */
 272         out_be32(non_ehci + FSL_SOC_USB_SNOOP2, 0x80000000 | SNOOP_SIZE_2GB);
 273 #endif
 274
 275         if ((pdata->operating_mode == FSL_USB2_DR_HOST) ||
 276                         (pdata->operating_mode == FSL_USB2_DR_OTG))
 277                 ehci_fsl_setup_phy(ehci, pdata->phy_mode, 0);
 278
 279         if (pdata->operating_mode == FSL_USB2_MPH_HOST) {
 280                 unsigned int chip, rev, svr;
 281
 282                 svr = mfspr(SPRN_SVR);
 283                 chip = svr >> 16;
 284                 rev = (svr >> 4) & 0xf;
 285
 286                 /* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */
 287                 if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055))
 288                         ehci->has_fsl_port_bug = 1;
 289
 290                 if (pdata->port_enables & FSL_USB2_PORT0_ENABLED)
 291                         ehci_fsl_setup_phy(ehci, pdata->phy_mode, 0);
 292                 if (pdata->port_enables & FSL_USB2_PORT1_ENABLED)
 293                         ehci_fsl_setup_phy(ehci, pdata->phy_mode, 1);
 294         }
 295
 296         if (pdata->have_sysif_regs) {
 297 #ifdef CONFIG_PPC_85xx
 298                 out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x00000008);
 299                 out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000080);
 300 #else
 301                 out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x0000000c);
 302                 out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000040);
 303 #endif
 304                 out_be32(non_ehci + FSL_SOC_USB_SICTRL, 0x00000001);
 305         }
 306 }
 307
 308 /* called after powerup, by probe or system-pm "wakeup" */
 309 static int ehci_fsl_reinit(struct ehci_hcd *ehci)
 310 {
 311         ehci_fsl_usb_setup(ehci);
 312         ehci_port_power(ehci, 0);
 313
 314         return 0;
 315 }
 316
 317 /* called during probe() after chip reset completes */
 318 static int ehci_fsl_setup(struct usb_hcd *hcd)
 319 {
 320         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 321         int retval;
 322         struct fsl_usb2_platform_data *pdata;
 323
 324         pdata = hcd->self.controller->platform_data;
 325         ehci->big_endian_desc = pdata->big_endian_desc;
 326         ehci->big_endian_mmio = pdata->big_endian_mmio;
 327
 328         /* EHCI registers start at offset 0x100 */
 329         ehci->caps = hcd->regs + 0x100;
 330         ehci->regs = hcd->regs + 0x100 +
 331                 HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
 332         dbg_hcs_params(ehci, "reset");
 333         dbg_hcc_params(ehci, "reset");
 334
 335         /* cache this readonly data; minimize chip reads */
 336         ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
 337
 338         hcd->has_tt = 1;
 339
 340         retval = ehci_halt(ehci);
 341         if (retval)
 342                 return retval;
 343
 344         /* data structure init */
 345         retval = ehci_init(hcd);
 346         if (retval)
 347                 return retval;
 348
 349         ehci->sbrn = 0x20;
 350
 351         ehci_reset(ehci);
 352
 353         retval = ehci_fsl_reinit(ehci);
 354         return retval;
 355 }
 356
 357 struct ehci_fsl {
 358         struct ehci_hcd ehci;
 359
 360 #ifdef CONFIG_PM
 361         /* Saved USB PHY settings, need to restore after deep sleep. */
 362         u32 usb_ctrl;
 363 #endif
 364 };
 365
 366 #ifdef CONFIG_PM
 367
 368 #ifdef CONFIG_PPC_MPC512x
 369 static int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
 370 {
 371         struct usb_hcd *hcd = dev_get_drvdata(dev);
 372         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 373         struct fsl_usb2_platform_data *pdata = dev->platform_data;
 374         u32 tmp;
 375
 376 #ifdef DEBUG
 377         u32 mode = ehci_readl(ehci, hcd->regs + FSL_SOC_USB_USBMODE);
 378         mode &= USBMODE_CM_MASK;
 379         tmp = ehci_readl(ehci, hcd->regs + 0x140);      /* usbcmd */
 380
 381         dev_dbg(dev, "suspend=%d already_suspended=%d "
 382                 "mode=%d  usbcmd %08x\n", pdata->suspended,
 383                 pdata->already_suspended, mode, tmp);
 384 #endif
 385
 386         /*
 387          * If the controller is already suspended, then this must be a
 388          * PM suspend.  Remember this fact, so that we will leave the
 389          * controller suspended at PM resume time.
 390          */
 391         if (pdata->suspended) {
 392                 dev_dbg(dev, "already suspended, leaving early\n");
 393                 pdata->already_suspended = 1;
 394                 return 0;
 395         }
 396
 397         dev_dbg(dev, "suspending...\n");
 398
 399         ehci->rh_state = EHCI_RH_SUSPENDED;
 400         dev->power.power_state = PMSG_SUSPEND;
 401
 402         /* ignore non-host interrupts */
 403         clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 404
 405         /* stop the controller */
 406         tmp = ehci_readl(ehci, &ehci->regs->command);
 407         tmp &= ~CMD_RUN;
 408         ehci_writel(ehci, tmp, &ehci->regs->command);
 409
 410         /* save EHCI registers */
 411         pdata->pm_command = ehci_readl(ehci, &ehci->regs->command);
 412         pdata->pm_command &= ~CMD_RUN;
 413         pdata->pm_status  = ehci_readl(ehci, &ehci->regs->status);
 414         pdata->pm_intr_enable  = ehci_readl(ehci, &ehci->regs->intr_enable);
 415         pdata->pm_frame_index  = ehci_readl(ehci, &ehci->regs->frame_index);
 416         pdata->pm_segment  = ehci_readl(ehci, &ehci->regs->segment);
 417         pdata->pm_frame_list  = ehci_readl(ehci, &ehci->regs->frame_list);
 418         pdata->pm_async_next  = ehci_readl(ehci, &ehci->regs->async_next);
 419         pdata->pm_configured_flag  =
 420                 ehci_readl(ehci, &ehci->regs->configured_flag);
 421         pdata->pm_portsc = ehci_readl(ehci, &ehci->regs->port_status[0]);
 422         pdata->pm_usbgenctrl = ehci_readl(ehci,
 423                                           hcd->regs + FSL_SOC_USB_USBGENCTRL);
 424
 425         /* clear the W1C bits */
 426         pdata->pm_portsc &= cpu_to_hc32(ehci, ~PORT_RWC_BITS);
 427
 428         pdata->suspended = 1;
 429
 430         /* clear PP to cut power to the port */
 431         tmp = ehci_readl(ehci, &ehci->regs->port_status[0]);
 432         tmp &= ~PORT_POWER;
 433         ehci_writel(ehci, tmp, &ehci->regs->port_status[0]);
 434
 435         return 0;
 436 }
 437
 438 static int ehci_fsl_mpc512x_drv_resume(struct device *dev)
 439 {
 440         struct usb_hcd *hcd = dev_get_drvdata(dev);
 441         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 442         struct fsl_usb2_platform_data *pdata = dev->platform_data;
 443         u32 tmp;
 444
 445         dev_dbg(dev, "suspend=%d already_suspended=%d\n",
 446                 pdata->suspended, pdata->already_suspended);
 447
 448         /*
 449          * If the controller was already suspended at suspend time,
 450          * then don't resume it now.
 451          */
 452         if (pdata->already_suspended) {
 453                 dev_dbg(dev, "already suspended, leaving early\n");
 454                 pdata->already_suspended = 0;
 455                 return 0;
 456         }
 457
 458         if (!pdata->suspended) {
 459                 dev_dbg(dev, "not suspended, leaving early\n");
 460                 return 0;
 461         }
 462
 463         pdata->suspended = 0;
 464
 465         dev_dbg(dev, "resuming...\n");
 466
 467         /* set host mode */
 468         tmp = USBMODE_CM_HOST | (pdata->es ? USBMODE_ES : 0);
 469         ehci_writel(ehci, tmp, hcd->regs + FSL_SOC_USB_USBMODE);
 470
 471         ehci_writel(ehci, pdata->pm_usbgenctrl,
 472                     hcd->regs + FSL_SOC_USB_USBGENCTRL);
 473         ehci_writel(ehci, ISIPHYCTRL_PXE | ISIPHYCTRL_PHYE,
 474                     hcd->regs + FSL_SOC_USB_ISIPHYCTRL);
 475
 476         /* restore EHCI registers */
 477         ehci_writel(ehci, pdata->pm_command, &ehci->regs->command);
 478         ehci_writel(ehci, pdata->pm_intr_enable, &ehci->regs->intr_enable);
 479         ehci_writel(ehci, pdata->pm_frame_index, &ehci->regs->frame_index);
 480         ehci_writel(ehci, pdata->pm_segment, &ehci->regs->segment);
 481         ehci_writel(ehci, pdata->pm_frame_list, &ehci->regs->frame_list);
 482         ehci_writel(ehci, pdata->pm_async_next, &ehci->regs->async_next);
 483         ehci_writel(ehci, pdata->pm_configured_flag,
 484                     &ehci->regs->configured_flag);
 485         ehci_writel(ehci, pdata->pm_portsc, &ehci->regs->port_status[0]);
 486
 487         set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 488         ehci->rh_state = EHCI_RH_RUNNING;
 489         dev->power.power_state = PMSG_ON;
 490
 491         tmp = ehci_readl(ehci, &ehci->regs->command);
 492         tmp |= CMD_RUN;
 493         ehci_writel(ehci, tmp, &ehci->regs->command);
 494
 495         usb_hcd_resume_root_hub(hcd);
 496
 497         return 0;
 498 }
 499 #else
 500 static inline int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
 501 {
 502         return 0;
 503 }
 504
 505 static inline int ehci_fsl_mpc512x_drv_resume(struct device *dev)
 506 {
 507         return 0;
 508 }
 509 #endif /* CONFIG_PPC_MPC512x */
 510
 511 static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd)
 512 {
 513         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 514
 515         return container_of(ehci, struct ehci_fsl, ehci);
 516 }
 517
 518 static int ehci_fsl_drv_suspend(struct device *dev)
 519 {
 520         struct usb_hcd *hcd = dev_get_drvdata(dev);
 521         struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
 522         void __iomem *non_ehci = hcd->regs;
 523
 524         if (of_device_is_compatible(dev->parent->of_node,
 525                                     "fsl,mpc5121-usb2-dr")) {
 526                 return ehci_fsl_mpc512x_drv_suspend(dev);
 527         }
 528
 529         ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd),
 530                         device_may_wakeup(dev));
 531         if (!fsl_deep_sleep())
 532                 return 0;
 533
 534         ehci_fsl->usb_ctrl = in_be32(non_ehci + FSL_SOC_USB_CTRL);
 535         return 0;
 536 }
 537
 538 static int ehci_fsl_drv_resume(struct device *dev)
 539 {
 540         struct usb_hcd *hcd = dev_get_drvdata(dev);
 541         struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
 542         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 543         void __iomem *non_ehci = hcd->regs;
 544
 545         if (of_device_is_compatible(dev->parent->of_node,
 546                                     "fsl,mpc5121-usb2-dr")) {
 547                 return ehci_fsl_mpc512x_drv_resume(dev);
 548         }
 549
 550         ehci_prepare_ports_for_controller_resume(ehci);
 551         if (!fsl_deep_sleep())
 552                 return 0;
 553
 554         usb_root_hub_lost_power(hcd->self.root_hub);
 555
 556         /* Restore USB PHY settings and enable the controller. */
 557         out_be32(non_ehci + FSL_SOC_USB_CTRL, ehci_fsl->usb_ctrl);
 558
 559         ehci_reset(ehci);
 560         ehci_fsl_reinit(ehci);
 561
 562         return 0;
 563 }
 564
 565 static int ehci_fsl_drv_restore(struct device *dev)
 566 {
 567         struct usb_hcd *hcd = dev_get_drvdata(dev);
 568
 569         usb_root_hub_lost_power(hcd->self.root_hub);
 570         return 0;
 571 }
 572
 573 static struct dev_pm_ops ehci_fsl_pm_ops = {
 574         .suspend = ehci_fsl_drv_suspend,
 575         .resume = ehci_fsl_drv_resume,
 576         .restore = ehci_fsl_drv_restore,
 577 };
 578
 579 #define EHCI_FSL_PM_OPS         (&ehci_fsl_pm_ops)
 580 #else
 581 #define EHCI_FSL_PM_OPS         NULL
 582 #endif /* CONFIG_PM */
 583
 584 #ifdef CONFIG_USB_OTG
 585 static int ehci_start_port_reset(struct usb_hcd *hcd, unsigned port)
 586 {
 587         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 588         u32 status;
 589
 590         if (!port)
 591                 return -EINVAL;
 592
 593         port--;
 594
 595         /* start port reset before HNP protocol time out */
 596         status = readl(&ehci->regs->port_status[port]);
 597         if (!(status & PORT_CONNECT))
 598                 return -ENODEV;
 599
 600         /* khubd will finish the reset later */
 601         if (ehci_is_TDI(ehci)) {
 602                 writel(PORT_RESET |
 603                        (status & ~(PORT_CSC | PORT_PEC | PORT_OCC)),
 604                        &ehci->regs->port_status[port]);
 605         } else {
 606                 writel(PORT_RESET, &ehci->regs->port_status[port]);
 607         }
 608
 609         return 0;
 610 }
 611 #else
 612 #define ehci_start_port_reset   NULL
 613 #endif /* CONFIG_USB_OTG */
 614
 615
 616 static const struct hc_driver ehci_fsl_hc_driver = {
 617         .description = hcd_name,
 618         .product_desc = "Freescale On-Chip EHCI Host Controller",
 619         .hcd_priv_size = sizeof(struct ehci_fsl),
 620
 621         /*
 622          * generic hardware linkage
 623          */
 624         .irq = ehci_irq,
 625         .flags = HCD_USB2 | HCD_MEMORY,
 626
 627         /*
 628          * basic lifecycle operations
 629          */
 630         .reset = ehci_fsl_setup,
 631         .start = ehci_run,
 632         .stop = ehci_stop,
 633         .shutdown = ehci_shutdown,
 634
 635         /*
 636          * managing i/o requests and associated device resources
 637          */
 638         .urb_enqueue = ehci_urb_enqueue,
 639         .urb_dequeue = ehci_urb_dequeue,
 640         .endpoint_disable = ehci_endpoint_disable,
 641         .endpoint_reset = ehci_endpoint_reset,
 642
 643         /*
 644          * scheduling support
 645          */
 646         .get_frame_number = ehci_get_frame,
 647
 648         /*
 649          * root hub support
 650          */
 651         .hub_status_data = ehci_hub_status_data,
 652         .hub_control = ehci_hub_control,
 653         .bus_suspend = ehci_bus_suspend,
 654         .bus_resume = ehci_bus_resume,
 655         .start_port_reset = ehci_start_port_reset,
 656         .relinquish_port = ehci_relinquish_port,
 657         .port_handed_over = ehci_port_handed_over,
 658
 659         .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
 660 };
 661
 662 static int ehci_fsl_drv_probe(struct platform_device *pdev)
 663 {
 664         if (usb_disabled())
 665                 return -ENODEV;
 666
 667         /* FIXME we only want one one probe() not two */
 668         return usb_hcd_fsl_probe(&ehci_fsl_hc_driver, pdev);
 669 }
 670
 671 static int ehci_fsl_drv_remove(struct platform_device *pdev)
 672 {
 673         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 674
 675         /* FIXME we only want one one remove() not two */
 676         usb_hcd_fsl_remove(hcd, pdev);
 677         return 0;
 678 }
 679
 680 MODULE_ALIAS("platform:fsl-ehci");
 681
 682 static struct platform_driver ehci_fsl_driver = {
 683         .probe = ehci_fsl_drv_probe,
 684         .remove = ehci_fsl_drv_remove,
 685         .shutdown = usb_hcd_platform_shutdown,
 686         .driver = {
 687                 .name = "fsl-ehci",
 688                 .pm = EHCI_FSL_PM_OPS,
 689         },
 690 };