1 /* 2 * Copyright 2005-2009 MontaVista Software, Inc. 3 * Copyright 2008,2012 Freescale Semiconductor, Inc. 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License as published by the 7 * Free Software Foundation; either version 2 of the License, or (at your 8 * option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, but 11 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 12 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software Foundation, 17 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 18 * 19 * Ported to 834x by Randy Vinson <rvinson@mvista.com> using code provided 20 * by Hunter Wu. 21 * Power Management support by Dave Liu <daveliu@freescale.com>, 22 * Jerry Huang <Chang-Ming.Huang@freescale.com> and 23 * Anton Vorontsov <avorontsov@ru.mvista.com>. 24 */ 25 26 #include <linux/kernel.h> 27 #include <linux/types.h> 28 #include <linux/delay.h> 29 #include <linux/pm.h> 30 #include <linux/err.h> 31 #include <linux/platform_device.h> 32 #include <linux/fsl_devices.h> 33 34 #include "ehci-fsl.h" 35 36 /* configure so an HC device and id are always provided */ 37 /* always called with process context; sleeping is OK */ 38 39 /** 40 * usb_hcd_fsl_probe - initialize FSL-based HCDs 41 * @drvier: Driver to be used for this HCD 42 * @pdev: USB Host Controller being probed 43 * Context: !in_interrupt() 44 * 45 * Allocates basic resources for this USB host controller. 46 * 47 */ 48 static int usb_hcd_fsl_probe(const struct hc_driver *driver, 49 struct platform_device *pdev) 50 { 51 struct fsl_usb2_platform_data *pdata; 52 struct usb_hcd *hcd; 53 struct resource *res; 54 int irq; 55 int retval; 56 57 pr_debug("initializing FSL-SOC USB Controller\n"); 58 59 /* Need platform data for setup */ 60 pdata = dev_get_platdata(&pdev->dev); 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 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 setbits32(hcd->regs + FSL_SOC_USB_CTRL, 0x4); 121 122 /* Don't need to set host mode here. It will be done by tdi_reset() */ 123 124 retval = usb_add_hcd(hcd, irq, IRQF_SHARED); 125 if (retval != 0) 126 goto err2; 127 device_wakeup_enable(hcd->self.controller); 128 129 #ifdef CONFIG_USB_OTG 130 if (pdata->operating_mode == FSL_USB2_DR_OTG) { 131 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 132 133 hcd->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2); 134 dev_dbg(&pdev->dev, "hcd=0x%p ehci=0x%p, phy=0x%p\n", 135 hcd, ehci, hcd->usb_phy); 136 137 if (!IS_ERR_OR_NULL(hcd->usb_phy)) { 138 retval = otg_set_host(hcd->usb_phy->otg, 139 &ehci_to_hcd(ehci)->self); 140 if (retval) { 141 usb_put_phy(hcd->usb_phy); 142 goto err2; 143 } 144 } else { 145 dev_err(&pdev->dev, "can't find phy\n"); 146 retval = -ENODEV; 147 goto err2; 148 } 149 } 150 #endif 151 return retval; 152 153 err2: 154 usb_put_hcd(hcd); 155 err1: 156 dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), retval); 157 if (pdata->exit) 158 pdata->exit(pdev); 159 return retval; 160 } 161 162 /* may be called without controller electrically present */ 163 /* may be called with controller, bus, and devices active */ 164 165 /** 166 * usb_hcd_fsl_remove - shutdown processing for FSL-based HCDs 167 * @dev: USB Host Controller being removed 168 * Context: !in_interrupt() 169 * 170 * Reverses the effect of usb_hcd_fsl_probe(). 171 * 172 */ 173 static void usb_hcd_fsl_remove(struct usb_hcd *hcd, 174 struct platform_device *pdev) 175 { 176 struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev); 177 178 if (!IS_ERR_OR_NULL(hcd->usb_phy)) { 179 otg_set_host(hcd->usb_phy->otg, NULL); 180 usb_put_phy(hcd->usb_phy); 181 } 182 183 usb_remove_hcd(hcd); 184 185 /* 186 * do platform specific un-initialization: 187 * release iomux pins, disable clock, etc. 188 */ 189 if (pdata->exit) 190 pdata->exit(pdev); 191 usb_put_hcd(hcd); 192 } 193 194 static int ehci_fsl_setup_phy(struct usb_hcd *hcd, 195 enum fsl_usb2_phy_modes phy_mode, 196 unsigned int port_offset) 197 { 198 u32 portsc; 199 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 200 void __iomem *non_ehci = hcd->regs; 201 struct device *dev = hcd->self.controller; 202 struct fsl_usb2_platform_data *pdata = dev_get_platdata(dev); 203 204 if (pdata->controller_ver < 0) { 205 dev_warn(hcd->self.controller, "Could not get controller version\n"); 206 return -ENODEV; 207 } 208 209 portsc = ehci_readl(ehci, &ehci->regs->port_status[port_offset]); 210 portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW); 211 212 switch (phy_mode) { 213 case FSL_USB2_PHY_ULPI: 214 if (pdata->have_sysif_regs && pdata->controller_ver) { 215 /* controller version 1.6 or above */ 216 clrbits32(non_ehci + FSL_SOC_USB_CTRL, UTMI_PHY_EN); 217 setbits32(non_ehci + FSL_SOC_USB_CTRL, 218 ULPI_PHY_CLK_SEL | USB_CTRL_USB_EN); 219 } 220 portsc |= PORT_PTS_ULPI; 221 break; 222 case FSL_USB2_PHY_SERIAL: 223 portsc |= PORT_PTS_SERIAL; 224 break; 225 case FSL_USB2_PHY_UTMI_WIDE: 226 portsc |= PORT_PTS_PTW; 227 /* fall through */ 228 case FSL_USB2_PHY_UTMI: 229 if (pdata->have_sysif_regs && pdata->controller_ver) { 230 /* controller version 1.6 or above */ 231 setbits32(non_ehci + FSL_SOC_USB_CTRL, UTMI_PHY_EN); 232 mdelay(FSL_UTMI_PHY_DLY); /* Delay for UTMI PHY CLK to 233 become stable - 10ms*/ 234 } 235 /* enable UTMI PHY */ 236 if (pdata->have_sysif_regs) 237 setbits32(non_ehci + FSL_SOC_USB_CTRL, 238 CTRL_UTMI_PHY_EN); 239 portsc |= PORT_PTS_UTMI; 240 break; 241 case FSL_USB2_PHY_NONE: 242 break; 243 } 244 245 if (pdata->have_sysif_regs && 246 pdata->controller_ver > FSL_USB_VER_1_6 && 247 (phy_mode == FSL_USB2_PHY_ULPI)) { 248 /* check PHY_CLK_VALID to get phy clk valid */ 249 if (!(spin_event_timeout(in_be32(non_ehci + FSL_SOC_USB_CTRL) & 250 PHY_CLK_VALID, FSL_USB_PHY_CLK_TIMEOUT, 0) || 251 in_be32(non_ehci + FSL_SOC_USB_PRICTRL))) { 252 dev_warn(hcd->self.controller, "USB PHY clock invalid\n"); 253 return -EINVAL; 254 } 255 } 256 257 ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]); 258 259 if (phy_mode != FSL_USB2_PHY_ULPI && pdata->have_sysif_regs) 260 setbits32(non_ehci + FSL_SOC_USB_CTRL, USB_CTRL_USB_EN); 261 262 return 0; 263 } 264 265 static int ehci_fsl_usb_setup(struct ehci_hcd *ehci) 266 { 267 struct usb_hcd *hcd = ehci_to_hcd(ehci); 268 struct fsl_usb2_platform_data *pdata; 269 void __iomem *non_ehci = hcd->regs; 270 271 pdata = dev_get_platdata(hcd->self.controller); 272 273 if (pdata->have_sysif_regs) { 274 /* 275 * Turn on cache snooping hardware, since some PowerPC platforms 276 * wholly rely on hardware to deal with cache coherent 277 */ 278 279 /* Setup Snooping for all the 4GB space */ 280 /* SNOOP1 starts from 0x0, size 2G */ 281 out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0 | SNOOP_SIZE_2GB); 282 /* SNOOP2 starts from 0x80000000, size 2G */ 283 out_be32(non_ehci + FSL_SOC_USB_SNOOP2, 0x80000000 | SNOOP_SIZE_2GB); 284 } 285 286 if ((pdata->operating_mode == FSL_USB2_DR_HOST) || 287 (pdata->operating_mode == FSL_USB2_DR_OTG)) 288 if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0)) 289 return -EINVAL; 290 291 if (pdata->operating_mode == FSL_USB2_MPH_HOST) { 292 unsigned int chip, rev, svr; 293 294 svr = mfspr(SPRN_SVR); 295 chip = svr >> 16; 296 rev = (svr >> 4) & 0xf; 297 298 /* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */ 299 if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055)) 300 ehci->has_fsl_port_bug = 1; 301 302 if (pdata->port_enables & FSL_USB2_PORT0_ENABLED) 303 if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0)) 304 return -EINVAL; 305 306 if (pdata->port_enables & FSL_USB2_PORT1_ENABLED) 307 if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 1)) 308 return -EINVAL; 309 } 310 311 if (pdata->have_sysif_regs) { 312 #ifdef CONFIG_FSL_SOC_BOOKE 313 out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x00000008); 314 out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000080); 315 #else 316 out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x0000000c); 317 out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000040); 318 #endif 319 out_be32(non_ehci + FSL_SOC_USB_SICTRL, 0x00000001); 320 } 321 322 return 0; 323 } 324 325 /* called after powerup, by probe or system-pm "wakeup" */ 326 static int ehci_fsl_reinit(struct ehci_hcd *ehci) 327 { 328 if (ehci_fsl_usb_setup(ehci)) 329 return -EINVAL; 330 331 return 0; 332 } 333 334 /* called during probe() after chip reset completes */ 335 static int ehci_fsl_setup(struct usb_hcd *hcd) 336 { 337 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 338 int retval; 339 struct fsl_usb2_platform_data *pdata; 340 struct device *dev; 341 342 dev = hcd->self.controller; 343 pdata = dev_get_platdata(hcd->self.controller); 344 ehci->big_endian_desc = pdata->big_endian_desc; 345 ehci->big_endian_mmio = pdata->big_endian_mmio; 346 347 /* EHCI registers start at offset 0x100 */ 348 ehci->caps = hcd->regs + 0x100; 349 350 #ifdef CONFIG_PPC_83xx 351 /* 352 * Deal with MPC834X that need port power to be cycled after the power 353 * fault condition is removed. Otherwise the state machine does not 354 * reflect PORTSC[CSC] correctly. 355 */ 356 ehci->need_oc_pp_cycle = 1; 357 #endif 358 359 hcd->has_tt = 1; 360 361 retval = ehci_setup(hcd); 362 if (retval) 363 return retval; 364 365 if (of_device_is_compatible(dev->parent->of_node, 366 "fsl,mpc5121-usb2-dr")) { 367 /* 368 * set SBUSCFG:AHBBRST so that control msgs don't 369 * fail when doing heavy PATA writes. 370 */ 371 ehci_writel(ehci, SBUSCFG_INCR8, 372 hcd->regs + FSL_SOC_USB_SBUSCFG); 373 } 374 375 retval = ehci_fsl_reinit(ehci); 376 return retval; 377 } 378 379 struct ehci_fsl { 380 struct ehci_hcd ehci; 381 382 #ifdef CONFIG_PM 383 /* Saved USB PHY settings, need to restore after deep sleep. */ 384 u32 usb_ctrl; 385 #endif 386 }; 387 388 #ifdef CONFIG_PM 389 390 #ifdef CONFIG_PPC_MPC512x 391 static int ehci_fsl_mpc512x_drv_suspend(struct device *dev) 392 { 393 struct usb_hcd *hcd = dev_get_drvdata(dev); 394 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 395 struct fsl_usb2_platform_data *pdata = dev_get_platdata(dev); 396 u32 tmp; 397 398 #ifdef CONFIG_DYNAMIC_DEBUG 399 u32 mode = ehci_readl(ehci, hcd->regs + FSL_SOC_USB_USBMODE); 400 mode &= USBMODE_CM_MASK; 401 tmp = ehci_readl(ehci, hcd->regs + 0x140); /* usbcmd */ 402 403 dev_dbg(dev, "suspend=%d already_suspended=%d " 404 "mode=%d usbcmd %08x\n", pdata->suspended, 405 pdata->already_suspended, mode, tmp); 406 #endif 407 408 /* 409 * If the controller is already suspended, then this must be a 410 * PM suspend. Remember this fact, so that we will leave the 411 * controller suspended at PM resume time. 412 */ 413 if (pdata->suspended) { 414 dev_dbg(dev, "already suspended, leaving early\n"); 415 pdata->already_suspended = 1; 416 return 0; 417 } 418 419 dev_dbg(dev, "suspending...\n"); 420 421 ehci->rh_state = EHCI_RH_SUSPENDED; 422 dev->power.power_state = PMSG_SUSPEND; 423 424 /* ignore non-host interrupts */ 425 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 426 427 /* stop the controller */ 428 tmp = ehci_readl(ehci, &ehci->regs->command); 429 tmp &= ~CMD_RUN; 430 ehci_writel(ehci, tmp, &ehci->regs->command); 431 432 /* save EHCI registers */ 433 pdata->pm_command = ehci_readl(ehci, &ehci->regs->command); 434 pdata->pm_command &= ~CMD_RUN; 435 pdata->pm_status = ehci_readl(ehci, &ehci->regs->status); 436 pdata->pm_intr_enable = ehci_readl(ehci, &ehci->regs->intr_enable); 437 pdata->pm_frame_index = ehci_readl(ehci, &ehci->regs->frame_index); 438 pdata->pm_segment = ehci_readl(ehci, &ehci->regs->segment); 439 pdata->pm_frame_list = ehci_readl(ehci, &ehci->regs->frame_list); 440 pdata->pm_async_next = ehci_readl(ehci, &ehci->regs->async_next); 441 pdata->pm_configured_flag = 442 ehci_readl(ehci, &ehci->regs->configured_flag); 443 pdata->pm_portsc = ehci_readl(ehci, &ehci->regs->port_status[0]); 444 pdata->pm_usbgenctrl = ehci_readl(ehci, 445 hcd->regs + FSL_SOC_USB_USBGENCTRL); 446 447 /* clear the W1C bits */ 448 pdata->pm_portsc &= cpu_to_hc32(ehci, ~PORT_RWC_BITS); 449 450 pdata->suspended = 1; 451 452 /* clear PP to cut power to the port */ 453 tmp = ehci_readl(ehci, &ehci->regs->port_status[0]); 454 tmp &= ~PORT_POWER; 455 ehci_writel(ehci, tmp, &ehci->regs->port_status[0]); 456 457 return 0; 458 } 459 460 static int ehci_fsl_mpc512x_drv_resume(struct device *dev) 461 { 462 struct usb_hcd *hcd = dev_get_drvdata(dev); 463 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 464 struct fsl_usb2_platform_data *pdata = dev_get_platdata(dev); 465 u32 tmp; 466 467 dev_dbg(dev, "suspend=%d already_suspended=%d\n", 468 pdata->suspended, pdata->already_suspended); 469 470 /* 471 * If the controller was already suspended at suspend time, 472 * then don't resume it now. 473 */ 474 if (pdata->already_suspended) { 475 dev_dbg(dev, "already suspended, leaving early\n"); 476 pdata->already_suspended = 0; 477 return 0; 478 } 479 480 if (!pdata->suspended) { 481 dev_dbg(dev, "not suspended, leaving early\n"); 482 return 0; 483 } 484 485 pdata->suspended = 0; 486 487 dev_dbg(dev, "resuming...\n"); 488 489 /* set host mode */ 490 tmp = USBMODE_CM_HOST | (pdata->es ? USBMODE_ES : 0); 491 ehci_writel(ehci, tmp, hcd->regs + FSL_SOC_USB_USBMODE); 492 493 ehci_writel(ehci, pdata->pm_usbgenctrl, 494 hcd->regs + FSL_SOC_USB_USBGENCTRL); 495 ehci_writel(ehci, ISIPHYCTRL_PXE | ISIPHYCTRL_PHYE, 496 hcd->regs + FSL_SOC_USB_ISIPHYCTRL); 497 498 ehci_writel(ehci, SBUSCFG_INCR8, hcd->regs + FSL_SOC_USB_SBUSCFG); 499 500 /* restore EHCI registers */ 501 ehci_writel(ehci, pdata->pm_command, &ehci->regs->command); 502 ehci_writel(ehci, pdata->pm_intr_enable, &ehci->regs->intr_enable); 503 ehci_writel(ehci, pdata->pm_frame_index, &ehci->regs->frame_index); 504 ehci_writel(ehci, pdata->pm_segment, &ehci->regs->segment); 505 ehci_writel(ehci, pdata->pm_frame_list, &ehci->regs->frame_list); 506 ehci_writel(ehci, pdata->pm_async_next, &ehci->regs->async_next); 507 ehci_writel(ehci, pdata->pm_configured_flag, 508 &ehci->regs->configured_flag); 509 ehci_writel(ehci, pdata->pm_portsc, &ehci->regs->port_status[0]); 510 511 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 512 ehci->rh_state = EHCI_RH_RUNNING; 513 dev->power.power_state = PMSG_ON; 514 515 tmp = ehci_readl(ehci, &ehci->regs->command); 516 tmp |= CMD_RUN; 517 ehci_writel(ehci, tmp, &ehci->regs->command); 518 519 usb_hcd_resume_root_hub(hcd); 520 521 return 0; 522 } 523 #else 524 static inline int ehci_fsl_mpc512x_drv_suspend(struct device *dev) 525 { 526 return 0; 527 } 528 529 static inline int ehci_fsl_mpc512x_drv_resume(struct device *dev) 530 { 531 return 0; 532 } 533 #endif /* CONFIG_PPC_MPC512x */ 534 535 static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd) 536 { 537 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 538 539 return container_of(ehci, struct ehci_fsl, ehci); 540 } 541 542 static int ehci_fsl_drv_suspend(struct device *dev) 543 { 544 struct usb_hcd *hcd = dev_get_drvdata(dev); 545 struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd); 546 void __iomem *non_ehci = hcd->regs; 547 548 if (of_device_is_compatible(dev->parent->of_node, 549 "fsl,mpc5121-usb2-dr")) { 550 return ehci_fsl_mpc512x_drv_suspend(dev); 551 } 552 553 ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd), 554 device_may_wakeup(dev)); 555 if (!fsl_deep_sleep()) 556 return 0; 557 558 ehci_fsl->usb_ctrl = in_be32(non_ehci + FSL_SOC_USB_CTRL); 559 return 0; 560 } 561 562 static int ehci_fsl_drv_resume(struct device *dev) 563 { 564 struct usb_hcd *hcd = dev_get_drvdata(dev); 565 struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd); 566 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 567 void __iomem *non_ehci = hcd->regs; 568 569 if (of_device_is_compatible(dev->parent->of_node, 570 "fsl,mpc5121-usb2-dr")) { 571 return ehci_fsl_mpc512x_drv_resume(dev); 572 } 573 574 ehci_prepare_ports_for_controller_resume(ehci); 575 if (!fsl_deep_sleep()) 576 return 0; 577 578 usb_root_hub_lost_power(hcd->self.root_hub); 579 580 /* Restore USB PHY settings and enable the controller. */ 581 out_be32(non_ehci + FSL_SOC_USB_CTRL, ehci_fsl->usb_ctrl); 582 583 ehci_reset(ehci); 584 ehci_fsl_reinit(ehci); 585 586 return 0; 587 } 588 589 static int ehci_fsl_drv_restore(struct device *dev) 590 { 591 struct usb_hcd *hcd = dev_get_drvdata(dev); 592 593 usb_root_hub_lost_power(hcd->self.root_hub); 594 return 0; 595 } 596 597 static struct dev_pm_ops ehci_fsl_pm_ops = { 598 .suspend = ehci_fsl_drv_suspend, 599 .resume = ehci_fsl_drv_resume, 600 .restore = ehci_fsl_drv_restore, 601 }; 602 603 #define EHCI_FSL_PM_OPS (&ehci_fsl_pm_ops) 604 #else 605 #define EHCI_FSL_PM_OPS NULL 606 #endif /* CONFIG_PM */ 607 608 #ifdef CONFIG_USB_OTG 609 static int ehci_start_port_reset(struct usb_hcd *hcd, unsigned port) 610 { 611 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 612 u32 status; 613 614 if (!port) 615 return -EINVAL; 616 617 port--; 618 619 /* start port reset before HNP protocol time out */ 620 status = readl(&ehci->regs->port_status[port]); 621 if (!(status & PORT_CONNECT)) 622 return -ENODEV; 623 624 /* hub_wq will finish the reset later */ 625 if (ehci_is_TDI(ehci)) { 626 writel(PORT_RESET | 627 (status & ~(PORT_CSC | PORT_PEC | PORT_OCC)), 628 &ehci->regs->port_status[port]); 629 } else { 630 writel(PORT_RESET, &ehci->regs->port_status[port]); 631 } 632 633 return 0; 634 } 635 #else 636 #define ehci_start_port_reset NULL 637 #endif /* CONFIG_USB_OTG */ 638 639 640 static const struct hc_driver ehci_fsl_hc_driver = { 641 .description = hcd_name, 642 .product_desc = "Freescale On-Chip EHCI Host Controller", 643 .hcd_priv_size = sizeof(struct ehci_fsl), 644 645 /* 646 * generic hardware linkage 647 */ 648 .irq = ehci_irq, 649 .flags = HCD_USB2 | HCD_MEMORY | HCD_BH, 650 651 /* 652 * basic lifecycle operations 653 */ 654 .reset = ehci_fsl_setup, 655 .start = ehci_run, 656 .stop = ehci_stop, 657 .shutdown = ehci_shutdown, 658 659 /* 660 * managing i/o requests and associated device resources 661 */ 662 .urb_enqueue = ehci_urb_enqueue, 663 .urb_dequeue = ehci_urb_dequeue, 664 .endpoint_disable = ehci_endpoint_disable, 665 .endpoint_reset = ehci_endpoint_reset, 666 667 /* 668 * scheduling support 669 */ 670 .get_frame_number = ehci_get_frame, 671 672 /* 673 * root hub support 674 */ 675 .hub_status_data = ehci_hub_status_data, 676 .hub_control = ehci_hub_control, 677 .bus_suspend = ehci_bus_suspend, 678 .bus_resume = ehci_bus_resume, 679 .start_port_reset = ehci_start_port_reset, 680 .relinquish_port = ehci_relinquish_port, 681 .port_handed_over = ehci_port_handed_over, 682 683 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, 684 }; 685 686 static int ehci_fsl_drv_probe(struct platform_device *pdev) 687 { 688 if (usb_disabled()) 689 return -ENODEV; 690 691 /* FIXME we only want one one probe() not two */ 692 return usb_hcd_fsl_probe(&ehci_fsl_hc_driver, pdev); 693 } 694 695 static int ehci_fsl_drv_remove(struct platform_device *pdev) 696 { 697 struct usb_hcd *hcd = platform_get_drvdata(pdev); 698 699 /* FIXME we only want one one remove() not two */ 700 usb_hcd_fsl_remove(hcd, pdev); 701 return 0; 702 } 703 704 MODULE_ALIAS("platform:fsl-ehci"); 705 706 static struct platform_driver ehci_fsl_driver = { 707 .probe = ehci_fsl_drv_probe, 708 .remove = ehci_fsl_drv_remove, 709 .shutdown = usb_hcd_platform_shutdown, 710 .driver = { 711 .name = "fsl-ehci", 712 .pm = EHCI_FSL_PM_OPS, 713 }, 714 }; 715