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 if (!res) { 97 dev_err(&pdev->dev, 98 "Found HC with no register addr. Check %s setup!\n", 99 dev_name(&pdev->dev)); 100 retval = -ENODEV; 101 goto err2; 102 } 103 hcd->rsrc_start = res->start; 104 hcd->rsrc_len = resource_size(res); 105 hcd->regs = devm_ioremap_resource(&pdev->dev, res); 106 if (IS_ERR(hcd->regs)) { 107 retval = PTR_ERR(hcd->regs); 108 goto err2; 109 } 110 111 pdata->regs = hcd->regs; 112 113 if (pdata->power_budget) 114 hcd->power_budget = pdata->power_budget; 115 116 /* 117 * do platform specific init: check the clock, grab/config pins, etc. 118 */ 119 if (pdata->init && pdata->init(pdev)) { 120 retval = -ENODEV; 121 goto err2; 122 } 123 124 /* Enable USB controller, 83xx or 8536 */ 125 if (pdata->have_sysif_regs && pdata->controller_ver < FSL_USB_VER_1_6) 126 setbits32(hcd->regs + FSL_SOC_USB_CTRL, 0x4); 127 128 /* Don't need to set host mode here. It will be done by tdi_reset() */ 129 130 retval = usb_add_hcd(hcd, irq, IRQF_SHARED); 131 if (retval != 0) 132 goto err2; 133 device_wakeup_enable(hcd->self.controller); 134 135 #ifdef CONFIG_USB_OTG 136 if (pdata->operating_mode == FSL_USB2_DR_OTG) { 137 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 138 139 hcd->phy = usb_get_phy(USB_PHY_TYPE_USB2); 140 dev_dbg(&pdev->dev, "hcd=0x%p ehci=0x%p, phy=0x%p\n", 141 hcd, ehci, hcd->phy); 142 143 if (!IS_ERR_OR_NULL(hcd->phy)) { 144 retval = otg_set_host(hcd->phy->otg, 145 &ehci_to_hcd(ehci)->self); 146 if (retval) { 147 usb_put_phy(hcd->phy); 148 goto err2; 149 } 150 } else { 151 dev_err(&pdev->dev, "can't find phy\n"); 152 retval = -ENODEV; 153 goto err2; 154 } 155 } 156 #endif 157 return retval; 158 159 err2: 160 usb_put_hcd(hcd); 161 err1: 162 dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), retval); 163 if (pdata->exit) 164 pdata->exit(pdev); 165 return retval; 166 } 167 168 /* may be called without controller electrically present */ 169 /* may be called with controller, bus, and devices active */ 170 171 /** 172 * usb_hcd_fsl_remove - shutdown processing for FSL-based HCDs 173 * @dev: USB Host Controller being removed 174 * Context: !in_interrupt() 175 * 176 * Reverses the effect of usb_hcd_fsl_probe(). 177 * 178 */ 179 static void usb_hcd_fsl_remove(struct usb_hcd *hcd, 180 struct platform_device *pdev) 181 { 182 struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev); 183 184 if (!IS_ERR_OR_NULL(hcd->phy)) { 185 otg_set_host(hcd->phy->otg, NULL); 186 usb_put_phy(hcd->phy); 187 } 188 189 usb_remove_hcd(hcd); 190 191 /* 192 * do platform specific un-initialization: 193 * release iomux pins, disable clock, etc. 194 */ 195 if (pdata->exit) 196 pdata->exit(pdev); 197 usb_put_hcd(hcd); 198 } 199 200 static int ehci_fsl_setup_phy(struct usb_hcd *hcd, 201 enum fsl_usb2_phy_modes phy_mode, 202 unsigned int port_offset) 203 { 204 u32 portsc; 205 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 206 void __iomem *non_ehci = hcd->regs; 207 struct device *dev = hcd->self.controller; 208 struct fsl_usb2_platform_data *pdata = dev_get_platdata(dev); 209 210 if (pdata->controller_ver < 0) { 211 dev_warn(hcd->self.controller, "Could not get controller version\n"); 212 return -ENODEV; 213 } 214 215 portsc = ehci_readl(ehci, &ehci->regs->port_status[port_offset]); 216 portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW); 217 218 switch (phy_mode) { 219 case FSL_USB2_PHY_ULPI: 220 if (pdata->have_sysif_regs && pdata->controller_ver) { 221 /* controller version 1.6 or above */ 222 clrbits32(non_ehci + FSL_SOC_USB_CTRL, UTMI_PHY_EN); 223 setbits32(non_ehci + FSL_SOC_USB_CTRL, 224 ULPI_PHY_CLK_SEL | USB_CTRL_USB_EN); 225 } 226 portsc |= PORT_PTS_ULPI; 227 break; 228 case FSL_USB2_PHY_SERIAL: 229 portsc |= PORT_PTS_SERIAL; 230 break; 231 case FSL_USB2_PHY_UTMI_WIDE: 232 portsc |= PORT_PTS_PTW; 233 /* fall through */ 234 case FSL_USB2_PHY_UTMI: 235 if (pdata->have_sysif_regs && pdata->controller_ver) { 236 /* controller version 1.6 or above */ 237 setbits32(non_ehci + FSL_SOC_USB_CTRL, UTMI_PHY_EN); 238 mdelay(FSL_UTMI_PHY_DLY); /* Delay for UTMI PHY CLK to 239 become stable - 10ms*/ 240 } 241 /* enable UTMI PHY */ 242 if (pdata->have_sysif_regs) 243 setbits32(non_ehci + FSL_SOC_USB_CTRL, 244 CTRL_UTMI_PHY_EN); 245 portsc |= PORT_PTS_UTMI; 246 break; 247 case FSL_USB2_PHY_NONE: 248 break; 249 } 250 251 if (pdata->have_sysif_regs && pdata->controller_ver && 252 (phy_mode == FSL_USB2_PHY_ULPI)) { 253 /* check PHY_CLK_VALID to get phy clk valid */ 254 if (!(spin_event_timeout(in_be32(non_ehci + FSL_SOC_USB_CTRL) & 255 PHY_CLK_VALID, FSL_USB_PHY_CLK_TIMEOUT, 0) || 256 in_be32(non_ehci + FSL_SOC_USB_PRICTRL))) { 257 dev_warn(hcd->self.controller, "USB PHY clock invalid\n"); 258 return -EINVAL; 259 } 260 } 261 262 ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]); 263 264 if (phy_mode != FSL_USB2_PHY_ULPI && pdata->have_sysif_regs) 265 setbits32(non_ehci + FSL_SOC_USB_CTRL, USB_CTRL_USB_EN); 266 267 return 0; 268 } 269 270 static int ehci_fsl_usb_setup(struct ehci_hcd *ehci) 271 { 272 struct usb_hcd *hcd = ehci_to_hcd(ehci); 273 struct fsl_usb2_platform_data *pdata; 274 void __iomem *non_ehci = hcd->regs; 275 276 pdata = dev_get_platdata(hcd->self.controller); 277 278 if (pdata->have_sysif_regs) { 279 /* 280 * Turn on cache snooping hardware, since some PowerPC platforms 281 * wholly rely on hardware to deal with cache coherent 282 */ 283 284 /* Setup Snooping for all the 4GB space */ 285 /* SNOOP1 starts from 0x0, size 2G */ 286 out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0 | SNOOP_SIZE_2GB); 287 /* SNOOP2 starts from 0x80000000, size 2G */ 288 out_be32(non_ehci + FSL_SOC_USB_SNOOP2, 0x80000000 | SNOOP_SIZE_2GB); 289 } 290 291 if ((pdata->operating_mode == FSL_USB2_DR_HOST) || 292 (pdata->operating_mode == FSL_USB2_DR_OTG)) 293 if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0)) 294 return -EINVAL; 295 296 if (pdata->operating_mode == FSL_USB2_MPH_HOST) { 297 unsigned int chip, rev, svr; 298 299 svr = mfspr(SPRN_SVR); 300 chip = svr >> 16; 301 rev = (svr >> 4) & 0xf; 302 303 /* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */ 304 if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055)) 305 ehci->has_fsl_port_bug = 1; 306 307 if (pdata->port_enables & FSL_USB2_PORT0_ENABLED) 308 if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0)) 309 return -EINVAL; 310 311 if (pdata->port_enables & FSL_USB2_PORT1_ENABLED) 312 if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 1)) 313 return -EINVAL; 314 } 315 316 if (pdata->have_sysif_regs) { 317 #ifdef CONFIG_FSL_SOC_BOOKE 318 out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x00000008); 319 out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000080); 320 #else 321 out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x0000000c); 322 out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000040); 323 #endif 324 out_be32(non_ehci + FSL_SOC_USB_SICTRL, 0x00000001); 325 } 326 327 return 0; 328 } 329 330 /* called after powerup, by probe or system-pm "wakeup" */ 331 static int ehci_fsl_reinit(struct ehci_hcd *ehci) 332 { 333 if (ehci_fsl_usb_setup(ehci)) 334 return -EINVAL; 335 336 return 0; 337 } 338 339 /* called during probe() after chip reset completes */ 340 static int ehci_fsl_setup(struct usb_hcd *hcd) 341 { 342 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 343 int retval; 344 struct fsl_usb2_platform_data *pdata; 345 struct device *dev; 346 347 dev = hcd->self.controller; 348 pdata = dev_get_platdata(hcd->self.controller); 349 ehci->big_endian_desc = pdata->big_endian_desc; 350 ehci->big_endian_mmio = pdata->big_endian_mmio; 351 352 /* EHCI registers start at offset 0x100 */ 353 ehci->caps = hcd->regs + 0x100; 354 355 #ifdef CONFIG_PPC_83xx 356 /* 357 * Deal with MPC834X that need port power to be cycled after the power 358 * fault condition is removed. Otherwise the state machine does not 359 * reflect PORTSC[CSC] correctly. 360 */ 361 ehci->need_oc_pp_cycle = 1; 362 #endif 363 364 hcd->has_tt = 1; 365 366 retval = ehci_setup(hcd); 367 if (retval) 368 return retval; 369 370 if (of_device_is_compatible(dev->parent->of_node, 371 "fsl,mpc5121-usb2-dr")) { 372 /* 373 * set SBUSCFG:AHBBRST so that control msgs don't 374 * fail when doing heavy PATA writes. 375 */ 376 ehci_writel(ehci, SBUSCFG_INCR8, 377 hcd->regs + FSL_SOC_USB_SBUSCFG); 378 } 379 380 retval = ehci_fsl_reinit(ehci); 381 return retval; 382 } 383 384 struct ehci_fsl { 385 struct ehci_hcd ehci; 386 387 #ifdef CONFIG_PM 388 /* Saved USB PHY settings, need to restore after deep sleep. */ 389 u32 usb_ctrl; 390 #endif 391 }; 392 393 #ifdef CONFIG_PM 394 395 #ifdef CONFIG_PPC_MPC512x 396 static int ehci_fsl_mpc512x_drv_suspend(struct device *dev) 397 { 398 struct usb_hcd *hcd = dev_get_drvdata(dev); 399 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 400 struct fsl_usb2_platform_data *pdata = dev_get_platdata(dev); 401 u32 tmp; 402 403 #ifdef CONFIG_DYNAMIC_DEBUG 404 u32 mode = ehci_readl(ehci, hcd->regs + FSL_SOC_USB_USBMODE); 405 mode &= USBMODE_CM_MASK; 406 tmp = ehci_readl(ehci, hcd->regs + 0x140); /* usbcmd */ 407 408 dev_dbg(dev, "suspend=%d already_suspended=%d " 409 "mode=%d usbcmd %08x\n", pdata->suspended, 410 pdata->already_suspended, mode, tmp); 411 #endif 412 413 /* 414 * If the controller is already suspended, then this must be a 415 * PM suspend. Remember this fact, so that we will leave the 416 * controller suspended at PM resume time. 417 */ 418 if (pdata->suspended) { 419 dev_dbg(dev, "already suspended, leaving early\n"); 420 pdata->already_suspended = 1; 421 return 0; 422 } 423 424 dev_dbg(dev, "suspending...\n"); 425 426 ehci->rh_state = EHCI_RH_SUSPENDED; 427 dev->power.power_state = PMSG_SUSPEND; 428 429 /* ignore non-host interrupts */ 430 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 431 432 /* stop the controller */ 433 tmp = ehci_readl(ehci, &ehci->regs->command); 434 tmp &= ~CMD_RUN; 435 ehci_writel(ehci, tmp, &ehci->regs->command); 436 437 /* save EHCI registers */ 438 pdata->pm_command = ehci_readl(ehci, &ehci->regs->command); 439 pdata->pm_command &= ~CMD_RUN; 440 pdata->pm_status = ehci_readl(ehci, &ehci->regs->status); 441 pdata->pm_intr_enable = ehci_readl(ehci, &ehci->regs->intr_enable); 442 pdata->pm_frame_index = ehci_readl(ehci, &ehci->regs->frame_index); 443 pdata->pm_segment = ehci_readl(ehci, &ehci->regs->segment); 444 pdata->pm_frame_list = ehci_readl(ehci, &ehci->regs->frame_list); 445 pdata->pm_async_next = ehci_readl(ehci, &ehci->regs->async_next); 446 pdata->pm_configured_flag = 447 ehci_readl(ehci, &ehci->regs->configured_flag); 448 pdata->pm_portsc = ehci_readl(ehci, &ehci->regs->port_status[0]); 449 pdata->pm_usbgenctrl = ehci_readl(ehci, 450 hcd->regs + FSL_SOC_USB_USBGENCTRL); 451 452 /* clear the W1C bits */ 453 pdata->pm_portsc &= cpu_to_hc32(ehci, ~PORT_RWC_BITS); 454 455 pdata->suspended = 1; 456 457 /* clear PP to cut power to the port */ 458 tmp = ehci_readl(ehci, &ehci->regs->port_status[0]); 459 tmp &= ~PORT_POWER; 460 ehci_writel(ehci, tmp, &ehci->regs->port_status[0]); 461 462 return 0; 463 } 464 465 static int ehci_fsl_mpc512x_drv_resume(struct device *dev) 466 { 467 struct usb_hcd *hcd = dev_get_drvdata(dev); 468 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 469 struct fsl_usb2_platform_data *pdata = dev_get_platdata(dev); 470 u32 tmp; 471 472 dev_dbg(dev, "suspend=%d already_suspended=%d\n", 473 pdata->suspended, pdata->already_suspended); 474 475 /* 476 * If the controller was already suspended at suspend time, 477 * then don't resume it now. 478 */ 479 if (pdata->already_suspended) { 480 dev_dbg(dev, "already suspended, leaving early\n"); 481 pdata->already_suspended = 0; 482 return 0; 483 } 484 485 if (!pdata->suspended) { 486 dev_dbg(dev, "not suspended, leaving early\n"); 487 return 0; 488 } 489 490 pdata->suspended = 0; 491 492 dev_dbg(dev, "resuming...\n"); 493 494 /* set host mode */ 495 tmp = USBMODE_CM_HOST | (pdata->es ? USBMODE_ES : 0); 496 ehci_writel(ehci, tmp, hcd->regs + FSL_SOC_USB_USBMODE); 497 498 ehci_writel(ehci, pdata->pm_usbgenctrl, 499 hcd->regs + FSL_SOC_USB_USBGENCTRL); 500 ehci_writel(ehci, ISIPHYCTRL_PXE | ISIPHYCTRL_PHYE, 501 hcd->regs + FSL_SOC_USB_ISIPHYCTRL); 502 503 ehci_writel(ehci, SBUSCFG_INCR8, hcd->regs + FSL_SOC_USB_SBUSCFG); 504 505 /* restore EHCI registers */ 506 ehci_writel(ehci, pdata->pm_command, &ehci->regs->command); 507 ehci_writel(ehci, pdata->pm_intr_enable, &ehci->regs->intr_enable); 508 ehci_writel(ehci, pdata->pm_frame_index, &ehci->regs->frame_index); 509 ehci_writel(ehci, pdata->pm_segment, &ehci->regs->segment); 510 ehci_writel(ehci, pdata->pm_frame_list, &ehci->regs->frame_list); 511 ehci_writel(ehci, pdata->pm_async_next, &ehci->regs->async_next); 512 ehci_writel(ehci, pdata->pm_configured_flag, 513 &ehci->regs->configured_flag); 514 ehci_writel(ehci, pdata->pm_portsc, &ehci->regs->port_status[0]); 515 516 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 517 ehci->rh_state = EHCI_RH_RUNNING; 518 dev->power.power_state = PMSG_ON; 519 520 tmp = ehci_readl(ehci, &ehci->regs->command); 521 tmp |= CMD_RUN; 522 ehci_writel(ehci, tmp, &ehci->regs->command); 523 524 usb_hcd_resume_root_hub(hcd); 525 526 return 0; 527 } 528 #else 529 static inline int ehci_fsl_mpc512x_drv_suspend(struct device *dev) 530 { 531 return 0; 532 } 533 534 static inline int ehci_fsl_mpc512x_drv_resume(struct device *dev) 535 { 536 return 0; 537 } 538 #endif /* CONFIG_PPC_MPC512x */ 539 540 static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd) 541 { 542 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 543 544 return container_of(ehci, struct ehci_fsl, ehci); 545 } 546 547 static int ehci_fsl_drv_suspend(struct device *dev) 548 { 549 struct usb_hcd *hcd = dev_get_drvdata(dev); 550 struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd); 551 void __iomem *non_ehci = hcd->regs; 552 553 if (of_device_is_compatible(dev->parent->of_node, 554 "fsl,mpc5121-usb2-dr")) { 555 return ehci_fsl_mpc512x_drv_suspend(dev); 556 } 557 558 ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd), 559 device_may_wakeup(dev)); 560 if (!fsl_deep_sleep()) 561 return 0; 562 563 ehci_fsl->usb_ctrl = in_be32(non_ehci + FSL_SOC_USB_CTRL); 564 return 0; 565 } 566 567 static int ehci_fsl_drv_resume(struct device *dev) 568 { 569 struct usb_hcd *hcd = dev_get_drvdata(dev); 570 struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd); 571 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 572 void __iomem *non_ehci = hcd->regs; 573 574 if (of_device_is_compatible(dev->parent->of_node, 575 "fsl,mpc5121-usb2-dr")) { 576 return ehci_fsl_mpc512x_drv_resume(dev); 577 } 578 579 ehci_prepare_ports_for_controller_resume(ehci); 580 if (!fsl_deep_sleep()) 581 return 0; 582 583 usb_root_hub_lost_power(hcd->self.root_hub); 584 585 /* Restore USB PHY settings and enable the controller. */ 586 out_be32(non_ehci + FSL_SOC_USB_CTRL, ehci_fsl->usb_ctrl); 587 588 ehci_reset(ehci); 589 ehci_fsl_reinit(ehci); 590 591 return 0; 592 } 593 594 static int ehci_fsl_drv_restore(struct device *dev) 595 { 596 struct usb_hcd *hcd = dev_get_drvdata(dev); 597 598 usb_root_hub_lost_power(hcd->self.root_hub); 599 return 0; 600 } 601 602 static struct dev_pm_ops ehci_fsl_pm_ops = { 603 .suspend = ehci_fsl_drv_suspend, 604 .resume = ehci_fsl_drv_resume, 605 .restore = ehci_fsl_drv_restore, 606 }; 607 608 #define EHCI_FSL_PM_OPS (&ehci_fsl_pm_ops) 609 #else 610 #define EHCI_FSL_PM_OPS NULL 611 #endif /* CONFIG_PM */ 612 613 #ifdef CONFIG_USB_OTG 614 static int ehci_start_port_reset(struct usb_hcd *hcd, unsigned port) 615 { 616 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 617 u32 status; 618 619 if (!port) 620 return -EINVAL; 621 622 port--; 623 624 /* start port reset before HNP protocol time out */ 625 status = readl(&ehci->regs->port_status[port]); 626 if (!(status & PORT_CONNECT)) 627 return -ENODEV; 628 629 /* khubd will finish the reset later */ 630 if (ehci_is_TDI(ehci)) { 631 writel(PORT_RESET | 632 (status & ~(PORT_CSC | PORT_PEC | PORT_OCC)), 633 &ehci->regs->port_status[port]); 634 } else { 635 writel(PORT_RESET, &ehci->regs->port_status[port]); 636 } 637 638 return 0; 639 } 640 #else 641 #define ehci_start_port_reset NULL 642 #endif /* CONFIG_USB_OTG */ 643 644 645 static const struct hc_driver ehci_fsl_hc_driver = { 646 .description = hcd_name, 647 .product_desc = "Freescale On-Chip EHCI Host Controller", 648 .hcd_priv_size = sizeof(struct ehci_fsl), 649 650 /* 651 * generic hardware linkage 652 */ 653 .irq = ehci_irq, 654 .flags = HCD_USB2 | HCD_MEMORY | HCD_BH, 655 656 /* 657 * basic lifecycle operations 658 */ 659 .reset = ehci_fsl_setup, 660 .start = ehci_run, 661 .stop = ehci_stop, 662 .shutdown = ehci_shutdown, 663 664 /* 665 * managing i/o requests and associated device resources 666 */ 667 .urb_enqueue = ehci_urb_enqueue, 668 .urb_dequeue = ehci_urb_dequeue, 669 .endpoint_disable = ehci_endpoint_disable, 670 .endpoint_reset = ehci_endpoint_reset, 671 672 /* 673 * scheduling support 674 */ 675 .get_frame_number = ehci_get_frame, 676 677 /* 678 * root hub support 679 */ 680 .hub_status_data = ehci_hub_status_data, 681 .hub_control = ehci_hub_control, 682 .bus_suspend = ehci_bus_suspend, 683 .bus_resume = ehci_bus_resume, 684 .start_port_reset = ehci_start_port_reset, 685 .relinquish_port = ehci_relinquish_port, 686 .port_handed_over = ehci_port_handed_over, 687 688 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, 689 }; 690 691 static int ehci_fsl_drv_probe(struct platform_device *pdev) 692 { 693 if (usb_disabled()) 694 return -ENODEV; 695 696 /* FIXME we only want one one probe() not two */ 697 return usb_hcd_fsl_probe(&ehci_fsl_hc_driver, pdev); 698 } 699 700 static int ehci_fsl_drv_remove(struct platform_device *pdev) 701 { 702 struct usb_hcd *hcd = platform_get_drvdata(pdev); 703 704 /* FIXME we only want one one remove() not two */ 705 usb_hcd_fsl_remove(hcd, pdev); 706 return 0; 707 } 708 709 MODULE_ALIAS("platform:fsl-ehci"); 710 711 static struct platform_driver ehci_fsl_driver = { 712 .probe = ehci_fsl_drv_probe, 713 .remove = ehci_fsl_drv_remove, 714 .shutdown = usb_hcd_platform_shutdown, 715 .driver = { 716 .name = "fsl-ehci", 717 .owner = THIS_MODULE, 718 .pm = EHCI_FSL_PM_OPS, 719 }, 720 }; 721