drivers/usb/host/ehci-fsl.c

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
fsl_ehci_drv_probe
usb_phy_clk_valid
ehci_fsl_setup_phy
ehci_fsl_usb_setup
ehci_fsl_reinit
ehci_fsl_setup
ehci_fsl_mpc512x_drv_suspend
ehci_fsl_mpc512x_drv_resume
ehci_fsl_mpc512x_drv_suspend
ehci_fsl_mpc512x_drv_resume
hcd_to_ehci_fsl
ehci_fsl_drv_suspend
ehci_fsl_drv_resume
ehci_fsl_drv_restore
ehci_start_port_reset
fsl_ehci_drv_remove
ehci_fsl_init
ehci_fsl_cleanup
   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2005-2009 MontaVista Software, Inc.
   4  * Copyright 2008,2012,2015      Freescale Semiconductor, Inc.
   5  *
   6  * Ported to 834x by Randy Vinson <rvinson@mvista.com> using code provided
   7  * by Hunter Wu.
   8  * Power Management support by Dave Liu <daveliu@freescale.com>,
   9  * Jerry Huang <Chang-Ming.Huang@freescale.com> and
  10  * Anton Vorontsov <avorontsov@ru.mvista.com>.
  11  */
  12 
  13 #include <linux/kernel.h>
  14 #include <linux/module.h>
  15 #include <linux/types.h>
  16 #include <linux/delay.h>
  17 #include <linux/pm.h>
  18 #include <linux/err.h>
  19 #include <linux/usb.h>
  20 #include <linux/usb/ehci_def.h>
  21 #include <linux/usb/hcd.h>
  22 #include <linux/usb/otg.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/fsl_devices.h>
  25 #include <linux/of_platform.h>
  26 #include <linux/io.h>
  27 
  28 #include "ehci.h"
  29 #include "ehci-fsl.h"
  30 
  31 #define DRIVER_DESC "Freescale EHCI Host controller driver"
  32 #define DRV_NAME "ehci-fsl"
  33 
  34 static struct hc_driver __read_mostly fsl_ehci_hc_driver;
  35 
  36 /* configure so an HC device and id are always provided */
  37 /* always called with process context; sleeping is OK */
  38 
  39 /*
  40  * fsl_ehci_drv_probe - initialize FSL-based HCDs
  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 fsl_ehci_drv_probe(struct platform_device *pdev)
  48 {
  49         struct fsl_usb2_platform_data *pdata;
  50         struct usb_hcd *hcd;
  51         struct resource *res;
  52         int irq;
  53         int retval;
  54         u32 tmp;
  55 
  56         pr_debug("initializing FSL-SOC USB Controller\n");
  57 
  58         /* Need platform data for setup */
  59         pdata = dev_get_platdata(&pdev->dev);
  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(&fsl_ehci_hc_driver, pdev->dev.parent,
  89                                &pdev->dev, dev_name(&pdev->dev), NULL);
  90         if (!hcd) {
  91                 retval = -ENOMEM;
  92                 goto err1;
  93         }
  94 
  95         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  96         hcd->regs = devm_ioremap_resource(&pdev->dev, res);
  97         if (IS_ERR(hcd->regs)) {
  98                 retval = PTR_ERR(hcd->regs);
  99                 goto err2;
 100         }
 101 
 102         hcd->rsrc_start = res->start;
 103         hcd->rsrc_len = resource_size(res);
 104 
 105         pdata->regs = hcd->regs;
 106 
 107         if (pdata->power_budget)
 108                 hcd->power_budget = pdata->power_budget;
 109 
 110         /*
 111          * do platform specific init: check the clock, grab/config pins, etc.
 112          */
 113         if (pdata->init && pdata->init(pdev)) {
 114                 retval = -ENODEV;
 115                 goto err2;
 116         }
 117 
 118         /* Enable USB controller, 83xx or 8536 */
 119         if (pdata->have_sysif_regs && pdata->controller_ver < FSL_USB_VER_1_6) {
 120                 tmp = ioread32be(hcd->regs + FSL_SOC_USB_CTRL);
 121                 tmp &= ~CONTROL_REGISTER_W1C_MASK;
 122                 tmp |= 0x4;
 123                 iowrite32be(tmp, hcd->regs + FSL_SOC_USB_CTRL);
 124         }
 125 
 126         /* Set USB_EN bit to select ULPI phy for USB controller version 2.5 */
 127         if (pdata->controller_ver == FSL_USB_VER_2_5 &&
 128             pdata->phy_mode == FSL_USB2_PHY_ULPI)
 129                 iowrite32be(USB_CTRL_USB_EN, hcd->regs + FSL_SOC_USB_CTRL);
 130 
 131         /*
 132          * Enable UTMI phy and program PTS field in UTMI mode before asserting
 133          * controller reset for USB Controller version 2.5
 134          */
 135         if (pdata->has_fsl_erratum_a007792) {
 136                 tmp = ioread32be(hcd->regs + FSL_SOC_USB_CTRL);
 137                 tmp &= ~CONTROL_REGISTER_W1C_MASK;
 138                 tmp |= CTRL_UTMI_PHY_EN;
 139                 iowrite32be(tmp, hcd->regs + FSL_SOC_USB_CTRL);
 140 
 141                 writel(PORT_PTS_UTMI, hcd->regs + FSL_SOC_USB_PORTSC1);
 142         }
 143 
 144         /* Don't need to set host mode here. It will be done by tdi_reset() */
 145 
 146         retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
 147         if (retval != 0)
 148                 goto err2;
 149         device_wakeup_enable(hcd->self.controller);
 150 
 151 #ifdef CONFIG_USB_OTG
 152         if (pdata->operating_mode == FSL_USB2_DR_OTG) {
 153                 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 154 
 155                 hcd->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
 156                 dev_dbg(&pdev->dev, "hcd=0x%p  ehci=0x%p, phy=0x%p\n",
 157                         hcd, ehci, hcd->usb_phy);
 158 
 159                 if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
 160                         retval = otg_set_host(hcd->usb_phy->otg,
 161                                               &ehci_to_hcd(ehci)->self);
 162                         if (retval) {
 163                                 usb_put_phy(hcd->usb_phy);
 164                                 goto err2;
 165                         }
 166                 } else {
 167                         dev_err(&pdev->dev, "can't find phy\n");
 168                         retval = -ENODEV;
 169                         goto err2;
 170                 }
 171 
 172                 hcd->skip_phy_initialization = 1;
 173         }
 174 #endif
 175         return retval;
 176 
 177       err2:
 178         usb_put_hcd(hcd);
 179       err1:
 180         dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), retval);
 181         if (pdata->exit)
 182                 pdata->exit(pdev);
 183         return retval;
 184 }
 185 
 186 static bool usb_phy_clk_valid(struct usb_hcd *hcd)
 187 {
 188         void __iomem *non_ehci = hcd->regs;
 189         bool ret = true;
 190 
 191         if (!(ioread32be(non_ehci + FSL_SOC_USB_CTRL) & PHY_CLK_VALID))
 192                 ret = false;
 193 
 194         return ret;
 195 }
 196 
 197 static int ehci_fsl_setup_phy(struct usb_hcd *hcd,
 198                                enum fsl_usb2_phy_modes phy_mode,
 199                                unsigned int port_offset)
 200 {
 201         u32 portsc, tmp;
 202         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 203         void __iomem *non_ehci = hcd->regs;
 204         struct device *dev = hcd->self.controller;
 205         struct fsl_usb2_platform_data *pdata = dev_get_platdata(dev);
 206 
 207         if (pdata->controller_ver < 0) {
 208                 dev_warn(hcd->self.controller, "Could not get controller version\n");
 209                 return -ENODEV;
 210         }
 211 
 212         portsc = ehci_readl(ehci, &ehci->regs->port_status[port_offset]);
 213         portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW);
 214 
 215         switch (phy_mode) {
 216         case FSL_USB2_PHY_ULPI:
 217                 if (pdata->have_sysif_regs && pdata->controller_ver) {
 218                         /* controller version 1.6 or above */
 219                         /* turn off UTMI PHY first */
 220                         tmp = ioread32be(non_ehci + FSL_SOC_USB_CTRL);
 221                         tmp &= ~(CONTROL_REGISTER_W1C_MASK | UTMI_PHY_EN);
 222                         iowrite32be(tmp, non_ehci + FSL_SOC_USB_CTRL);
 223 
 224                         /* then turn on ULPI and enable USB controller */
 225                         tmp = ioread32be(non_ehci + FSL_SOC_USB_CTRL);
 226                         tmp &= ~CONTROL_REGISTER_W1C_MASK;
 227                         tmp |= ULPI_PHY_CLK_SEL | USB_CTRL_USB_EN;
 228                         iowrite32be(tmp, non_ehci + FSL_SOC_USB_CTRL);
 229                 }
 230                 portsc |= PORT_PTS_ULPI;
 231                 break;
 232         case FSL_USB2_PHY_SERIAL:
 233                 portsc |= PORT_PTS_SERIAL;
 234                 break;
 235         case FSL_USB2_PHY_UTMI_WIDE:
 236                 portsc |= PORT_PTS_PTW;
 237                 /* fall through */
 238         case FSL_USB2_PHY_UTMI:
 239                 /* Presence of this node "has_fsl_erratum_a006918"
 240                  * in device-tree is used to stop USB controller
 241                  * initialization in Linux
 242                  */
 243                 if (pdata->has_fsl_erratum_a006918) {
 244                         dev_warn(dev, "USB PHY clock invalid\n");
 245                         return -EINVAL;
 246                 }
 247                 /* fall through */
 248         case FSL_USB2_PHY_UTMI_DUAL:
 249                 /* PHY_CLK_VALID bit is de-featured from all controller
 250                  * versions below 2.4 and is to be checked only for
 251                  * internal UTMI phy
 252                  */
 253                 if (pdata->controller_ver > FSL_USB_VER_2_4 &&
 254                     pdata->have_sysif_regs && !usb_phy_clk_valid(hcd)) {
 255                         dev_err(dev, "USB PHY clock invalid\n");
 256                         return -EINVAL;
 257                 }
 258 
 259                 if (pdata->have_sysif_regs && pdata->controller_ver) {
 260                         /* controller version 1.6 or above */
 261                         tmp = ioread32be(non_ehci + FSL_SOC_USB_CTRL);
 262                         tmp &= ~CONTROL_REGISTER_W1C_MASK;
 263                         tmp |= UTMI_PHY_EN;
 264                         iowrite32be(tmp, non_ehci + FSL_SOC_USB_CTRL);
 265 
 266                         mdelay(FSL_UTMI_PHY_DLY);  /* Delay for UTMI PHY CLK to
 267                                                 become stable - 10ms*/
 268                 }
 269                 /* enable UTMI PHY */
 270                 if (pdata->have_sysif_regs) {
 271                         tmp = ioread32be(non_ehci + FSL_SOC_USB_CTRL);
 272                         tmp &= ~CONTROL_REGISTER_W1C_MASK;
 273                         tmp |= CTRL_UTMI_PHY_EN;
 274                         iowrite32be(tmp, non_ehci + FSL_SOC_USB_CTRL);
 275                 }
 276                 portsc |= PORT_PTS_UTMI;
 277                 break;
 278         case FSL_USB2_PHY_NONE:
 279                 break;
 280         }
 281 
 282         if (pdata->have_sysif_regs &&
 283             pdata->controller_ver > FSL_USB_VER_1_6 &&
 284             !usb_phy_clk_valid(hcd)) {
 285                 dev_warn(hcd->self.controller, "USB PHY clock invalid\n");
 286                 return -EINVAL;
 287         }
 288 
 289         ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]);
 290 
 291         if (phy_mode != FSL_USB2_PHY_ULPI && pdata->have_sysif_regs) {
 292                 tmp = ioread32be(non_ehci + FSL_SOC_USB_CTRL);
 293                 tmp &= ~CONTROL_REGISTER_W1C_MASK;
 294                 tmp |= USB_CTRL_USB_EN;
 295                 iowrite32be(tmp, non_ehci + FSL_SOC_USB_CTRL);
 296         }
 297 
 298         return 0;
 299 }
 300 
 301 static int ehci_fsl_usb_setup(struct ehci_hcd *ehci)
 302 {
 303         struct usb_hcd *hcd = ehci_to_hcd(ehci);
 304         struct fsl_usb2_platform_data *pdata;
 305         void __iomem *non_ehci = hcd->regs;
 306 
 307         pdata = dev_get_platdata(hcd->self.controller);
 308 
 309         if (pdata->have_sysif_regs) {
 310                 /*
 311                 * Turn on cache snooping hardware, since some PowerPC platforms
 312                 * wholly rely on hardware to deal with cache coherent
 313                 */
 314 
 315                 /* Setup Snooping for all the 4GB space */
 316                 /* SNOOP1 starts from 0x0, size 2G */
 317                 iowrite32be(0x0 | SNOOP_SIZE_2GB,
 318                             non_ehci + FSL_SOC_USB_SNOOP1);
 319                 /* SNOOP2 starts from 0x80000000, size 2G */
 320                 iowrite32be(0x80000000 | SNOOP_SIZE_2GB,
 321                             non_ehci + FSL_SOC_USB_SNOOP2);
 322         }
 323 
 324         /* Deal with USB erratum A-005275 */
 325         if (pdata->has_fsl_erratum_a005275 == 1)
 326                 ehci->has_fsl_hs_errata = 1;
 327 
 328         if (pdata->has_fsl_erratum_a005697 == 1)
 329                 ehci->has_fsl_susp_errata = 1;
 330 
 331         if ((pdata->operating_mode == FSL_USB2_DR_HOST) ||
 332                         (pdata->operating_mode == FSL_USB2_DR_OTG))
 333                 if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0))
 334                         return -EINVAL;
 335 
 336         if (pdata->operating_mode == FSL_USB2_MPH_HOST) {
 337 
 338                 /* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */
 339                 if (pdata->has_fsl_erratum_14 == 1)
 340                         ehci->has_fsl_port_bug = 1;
 341 
 342                 if (pdata->port_enables & FSL_USB2_PORT0_ENABLED)
 343                         if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0))
 344                                 return -EINVAL;
 345 
 346                 if (pdata->port_enables & FSL_USB2_PORT1_ENABLED)
 347                         if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 1))
 348                                 return -EINVAL;
 349         }
 350 
 351         if (pdata->have_sysif_regs) {
 352 #ifdef CONFIG_FSL_SOC_BOOKE
 353                 iowrite32be(0x00000008, non_ehci + FSL_SOC_USB_PRICTRL);
 354                 iowrite32be(0x00000080, non_ehci + FSL_SOC_USB_AGECNTTHRSH);
 355 #else
 356                 iowrite32be(0x0000000c, non_ehci + FSL_SOC_USB_PRICTRL);
 357                 iowrite32be(0x00000040, non_ehci + FSL_SOC_USB_AGECNTTHRSH);
 358 #endif
 359                 iowrite32be(0x00000001, non_ehci + FSL_SOC_USB_SICTRL);
 360         }
 361 
 362         return 0;
 363 }
 364 
 365 /* called after powerup, by probe or system-pm "wakeup" */
 366 static int ehci_fsl_reinit(struct ehci_hcd *ehci)
 367 {
 368         if (ehci_fsl_usb_setup(ehci))
 369                 return -EINVAL;
 370 
 371         return 0;
 372 }
 373 
 374 /* called during probe() after chip reset completes */
 375 static int ehci_fsl_setup(struct usb_hcd *hcd)
 376 {
 377         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 378         int retval;
 379         struct fsl_usb2_platform_data *pdata;
 380         struct device *dev;
 381 
 382         dev = hcd->self.controller;
 383         pdata = dev_get_platdata(hcd->self.controller);
 384         ehci->big_endian_desc = pdata->big_endian_desc;
 385         ehci->big_endian_mmio = pdata->big_endian_mmio;
 386 
 387         /* EHCI registers start at offset 0x100 */
 388         ehci->caps = hcd->regs + 0x100;
 389 
 390 #ifdef CONFIG_PPC_83xx
 391         /*
 392          * Deal with MPC834X that need port power to be cycled after the power
 393          * fault condition is removed. Otherwise the state machine does not
 394          * reflect PORTSC[CSC] correctly.
 395          */
 396         ehci->need_oc_pp_cycle = 1;
 397 #endif
 398 
 399         hcd->has_tt = 1;
 400 
 401         retval = ehci_setup(hcd);
 402         if (retval)
 403                 return retval;
 404 
 405         if (of_device_is_compatible(dev->parent->of_node,
 406                                     "fsl,mpc5121-usb2-dr")) {
 407                 /*
 408                  * set SBUSCFG:AHBBRST so that control msgs don't
 409                  * fail when doing heavy PATA writes.
 410                  */
 411                 ehci_writel(ehci, SBUSCFG_INCR8,
 412                             hcd->regs + FSL_SOC_USB_SBUSCFG);
 413         }
 414 
 415         retval = ehci_fsl_reinit(ehci);
 416         return retval;
 417 }
 418 
 419 struct ehci_fsl {
 420         struct ehci_hcd ehci;
 421 
 422 #ifdef CONFIG_PM
 423         /* Saved USB PHY settings, need to restore after deep sleep. */
 424         u32 usb_ctrl;
 425 #endif
 426 };
 427 
 428 #ifdef CONFIG_PM
 429 
 430 #ifdef CONFIG_PPC_MPC512x
 431 static int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
 432 {
 433         struct usb_hcd *hcd = dev_get_drvdata(dev);
 434         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 435         struct fsl_usb2_platform_data *pdata = dev_get_platdata(dev);
 436         u32 tmp;
 437 
 438 #ifdef CONFIG_DYNAMIC_DEBUG
 439         u32 mode = ehci_readl(ehci, hcd->regs + FSL_SOC_USB_USBMODE);
 440         mode &= USBMODE_CM_MASK;
 441         tmp = ehci_readl(ehci, hcd->regs + 0x140);      /* usbcmd */
 442 
 443         dev_dbg(dev, "suspend=%d already_suspended=%d "
 444                 "mode=%d  usbcmd %08x\n", pdata->suspended,
 445                 pdata->already_suspended, mode, tmp);
 446 #endif
 447 
 448         /*
 449          * If the controller is already suspended, then this must be a
 450          * PM suspend.  Remember this fact, so that we will leave the
 451          * controller suspended at PM resume time.
 452          */
 453         if (pdata->suspended) {
 454                 dev_dbg(dev, "already suspended, leaving early\n");
 455                 pdata->already_suspended = 1;
 456                 return 0;
 457         }
 458 
 459         dev_dbg(dev, "suspending...\n");
 460 
 461         ehci->rh_state = EHCI_RH_SUSPENDED;
 462         dev->power.power_state = PMSG_SUSPEND;
 463 
 464         /* ignore non-host interrupts */
 465         clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 466 
 467         /* stop the controller */
 468         tmp = ehci_readl(ehci, &ehci->regs->command);
 469         tmp &= ~CMD_RUN;
 470         ehci_writel(ehci, tmp, &ehci->regs->command);
 471 
 472         /* save EHCI registers */
 473         pdata->pm_command = ehci_readl(ehci, &ehci->regs->command);
 474         pdata->pm_command &= ~CMD_RUN;
 475         pdata->pm_status  = ehci_readl(ehci, &ehci->regs->status);
 476         pdata->pm_intr_enable  = ehci_readl(ehci, &ehci->regs->intr_enable);
 477         pdata->pm_frame_index  = ehci_readl(ehci, &ehci->regs->frame_index);
 478         pdata->pm_segment  = ehci_readl(ehci, &ehci->regs->segment);
 479         pdata->pm_frame_list  = ehci_readl(ehci, &ehci->regs->frame_list);
 480         pdata->pm_async_next  = ehci_readl(ehci, &ehci->regs->async_next);
 481         pdata->pm_configured_flag  =
 482                 ehci_readl(ehci, &ehci->regs->configured_flag);
 483         pdata->pm_portsc = ehci_readl(ehci, &ehci->regs->port_status[0]);
 484         pdata->pm_usbgenctrl = ehci_readl(ehci,
 485                                           hcd->regs + FSL_SOC_USB_USBGENCTRL);
 486 
 487         /* clear the W1C bits */
 488         pdata->pm_portsc &= cpu_to_hc32(ehci, ~PORT_RWC_BITS);
 489 
 490         pdata->suspended = 1;
 491 
 492         /* clear PP to cut power to the port */
 493         tmp = ehci_readl(ehci, &ehci->regs->port_status[0]);
 494         tmp &= ~PORT_POWER;
 495         ehci_writel(ehci, tmp, &ehci->regs->port_status[0]);
 496 
 497         return 0;
 498 }
 499 
 500 static int ehci_fsl_mpc512x_drv_resume(struct device *dev)
 501 {
 502         struct usb_hcd *hcd = dev_get_drvdata(dev);
 503         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 504         struct fsl_usb2_platform_data *pdata = dev_get_platdata(dev);
 505         u32 tmp;
 506 
 507         dev_dbg(dev, "suspend=%d already_suspended=%d\n",
 508                 pdata->suspended, pdata->already_suspended);
 509 
 510         /*
 511          * If the controller was already suspended at suspend time,
 512          * then don't resume it now.
 513          */
 514         if (pdata->already_suspended) {
 515                 dev_dbg(dev, "already suspended, leaving early\n");
 516                 pdata->already_suspended = 0;
 517                 return 0;
 518         }
 519 
 520         if (!pdata->suspended) {
 521                 dev_dbg(dev, "not suspended, leaving early\n");
 522                 return 0;
 523         }
 524 
 525         pdata->suspended = 0;
 526 
 527         dev_dbg(dev, "resuming...\n");
 528 
 529         /* set host mode */
 530         tmp = USBMODE_CM_HOST | (pdata->es ? USBMODE_ES : 0);
 531         ehci_writel(ehci, tmp, hcd->regs + FSL_SOC_USB_USBMODE);
 532 
 533         ehci_writel(ehci, pdata->pm_usbgenctrl,
 534                     hcd->regs + FSL_SOC_USB_USBGENCTRL);
 535         ehci_writel(ehci, ISIPHYCTRL_PXE | ISIPHYCTRL_PHYE,
 536                     hcd->regs + FSL_SOC_USB_ISIPHYCTRL);
 537 
 538         ehci_writel(ehci, SBUSCFG_INCR8, hcd->regs + FSL_SOC_USB_SBUSCFG);
 539 
 540         /* restore EHCI registers */
 541         ehci_writel(ehci, pdata->pm_command, &ehci->regs->command);
 542         ehci_writel(ehci, pdata->pm_intr_enable, &ehci->regs->intr_enable);
 543         ehci_writel(ehci, pdata->pm_frame_index, &ehci->regs->frame_index);
 544         ehci_writel(ehci, pdata->pm_segment, &ehci->regs->segment);
 545         ehci_writel(ehci, pdata->pm_frame_list, &ehci->regs->frame_list);
 546         ehci_writel(ehci, pdata->pm_async_next, &ehci->regs->async_next);
 547         ehci_writel(ehci, pdata->pm_configured_flag,
 548                     &ehci->regs->configured_flag);
 549         ehci_writel(ehci, pdata->pm_portsc, &ehci->regs->port_status[0]);
 550 
 551         set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 552         ehci->rh_state = EHCI_RH_RUNNING;
 553         dev->power.power_state = PMSG_ON;
 554 
 555         tmp = ehci_readl(ehci, &ehci->regs->command);
 556         tmp |= CMD_RUN;
 557         ehci_writel(ehci, tmp, &ehci->regs->command);
 558 
 559         usb_hcd_resume_root_hub(hcd);
 560 
 561         return 0;
 562 }
 563 #else
 564 static inline int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
 565 {
 566         return 0;
 567 }
 568 
 569 static inline int ehci_fsl_mpc512x_drv_resume(struct device *dev)
 570 {
 571         return 0;
 572 }
 573 #endif /* CONFIG_PPC_MPC512x */
 574 
 575 static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd)
 576 {
 577         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 578 
 579         return container_of(ehci, struct ehci_fsl, ehci);
 580 }
 581 
 582 static int ehci_fsl_drv_suspend(struct device *dev)
 583 {
 584         struct usb_hcd *hcd = dev_get_drvdata(dev);
 585         struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
 586         void __iomem *non_ehci = hcd->regs;
 587 
 588         if (of_device_is_compatible(dev->parent->of_node,
 589                                     "fsl,mpc5121-usb2-dr")) {
 590                 return ehci_fsl_mpc512x_drv_suspend(dev);
 591         }
 592 
 593         ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd),
 594                         device_may_wakeup(dev));
 595         if (!fsl_deep_sleep())
 596                 return 0;
 597 
 598         ehci_fsl->usb_ctrl = ioread32be(non_ehci + FSL_SOC_USB_CTRL);
 599         return 0;
 600 }
 601 
 602 static int ehci_fsl_drv_resume(struct device *dev)
 603 {
 604         struct usb_hcd *hcd = dev_get_drvdata(dev);
 605         struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
 606         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 607         void __iomem *non_ehci = hcd->regs;
 608 
 609         if (of_device_is_compatible(dev->parent->of_node,
 610                                     "fsl,mpc5121-usb2-dr")) {
 611                 return ehci_fsl_mpc512x_drv_resume(dev);
 612         }
 613 
 614         ehci_prepare_ports_for_controller_resume(ehci);
 615         if (!fsl_deep_sleep())
 616                 return 0;
 617 
 618         usb_root_hub_lost_power(hcd->self.root_hub);
 619 
 620         /* Restore USB PHY settings and enable the controller. */
 621         iowrite32be(ehci_fsl->usb_ctrl, non_ehci + FSL_SOC_USB_CTRL);
 622 
 623         ehci_reset(ehci);
 624         ehci_fsl_reinit(ehci);
 625 
 626         return 0;
 627 }
 628 
 629 static int ehci_fsl_drv_restore(struct device *dev)
 630 {
 631         struct usb_hcd *hcd = dev_get_drvdata(dev);
 632 
 633         usb_root_hub_lost_power(hcd->self.root_hub);
 634         return 0;
 635 }
 636 
 637 static const struct dev_pm_ops ehci_fsl_pm_ops = {
 638         .suspend = ehci_fsl_drv_suspend,
 639         .resume = ehci_fsl_drv_resume,
 640         .restore = ehci_fsl_drv_restore,
 641 };
 642 
 643 #define EHCI_FSL_PM_OPS         (&ehci_fsl_pm_ops)
 644 #else
 645 #define EHCI_FSL_PM_OPS         NULL
 646 #endif /* CONFIG_PM */
 647 
 648 #ifdef CONFIG_USB_OTG
 649 static int ehci_start_port_reset(struct usb_hcd *hcd, unsigned port)
 650 {
 651         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 652         u32 status;
 653 
 654         if (!port)
 655                 return -EINVAL;
 656 
 657         port--;
 658 
 659         /* start port reset before HNP protocol time out */
 660         status = readl(&ehci->regs->port_status[port]);
 661         if (!(status & PORT_CONNECT))
 662                 return -ENODEV;
 663 
 664         /* hub_wq will finish the reset later */
 665         if (ehci_is_TDI(ehci)) {
 666                 writel(PORT_RESET |
 667                        (status & ~(PORT_CSC | PORT_PEC | PORT_OCC)),
 668                        &ehci->regs->port_status[port]);
 669         } else {
 670                 writel(PORT_RESET, &ehci->regs->port_status[port]);
 671         }
 672 
 673         return 0;
 674 }
 675 #else
 676 #define ehci_start_port_reset   NULL
 677 #endif /* CONFIG_USB_OTG */
 678 
 679 static const struct ehci_driver_overrides ehci_fsl_overrides __initconst = {
 680         .extra_priv_size = sizeof(struct ehci_fsl),
 681         .reset = ehci_fsl_setup,
 682 };
 683 
 684 /**
 685  * fsl_ehci_drv_remove - shutdown processing for FSL-based HCDs
 686  * @dev: USB Host Controller being removed
 687  * Context: !in_interrupt()
 688  *
 689  * Reverses the effect of usb_hcd_fsl_probe().
 690  *
 691  */
 692 
 693 static int fsl_ehci_drv_remove(struct platform_device *pdev)
 694 {
 695         struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
 696         struct usb_hcd *hcd = platform_get_drvdata(pdev);
 697 
 698         if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
 699                 otg_set_host(hcd->usb_phy->otg, NULL);
 700                 usb_put_phy(hcd->usb_phy);
 701         }
 702 
 703         usb_remove_hcd(hcd);
 704 
 705         /*
 706          * do platform specific un-initialization:
 707          * release iomux pins, disable clock, etc.
 708          */
 709         if (pdata->exit)
 710                 pdata->exit(pdev);
 711         usb_put_hcd(hcd);
 712 
 713         return 0;
 714 }
 715 
 716 static struct platform_driver ehci_fsl_driver = {
 717         .probe = fsl_ehci_drv_probe,
 718         .remove = fsl_ehci_drv_remove,
 719         .shutdown = usb_hcd_platform_shutdown,
 720         .driver = {
 721                 .name = "fsl-ehci",
 722                 .pm = EHCI_FSL_PM_OPS,
 723         },
 724 };
 725 
 726 static int __init ehci_fsl_init(void)
 727 {
 728         if (usb_disabled())
 729                 return -ENODEV;
 730 
 731         pr_info(DRV_NAME ": " DRIVER_DESC "\n");
 732 
 733         ehci_init_driver(&fsl_ehci_hc_driver, &ehci_fsl_overrides);
 734 
 735         fsl_ehci_hc_driver.product_desc =
 736                         "Freescale On-Chip EHCI Host Controller";
 737         fsl_ehci_hc_driver.start_port_reset = ehci_start_port_reset;
 738 
 739 
 740         return platform_driver_register(&ehci_fsl_driver);
 741 }
 742 module_init(ehci_fsl_init);
 743 
 744 static void __exit ehci_fsl_cleanup(void)
 745 {
 746         platform_driver_unregister(&ehci_fsl_driver);
 747 }
 748 module_exit(ehci_fsl_cleanup);
 749 
 750 MODULE_DESCRIPTION(DRIVER_DESC);
 751 MODULE_LICENSE("GPL");
 752 MODULE_ALIAS("platform:" DRV_NAME);
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/usb/host/ehci-fsl.c

DEFINITIONS
