1 /* 2 * Copyright 2005-2009 MontaVista Software, Inc. 3 * Copyright 2008,2012 Freescale Semiconductor, Inc. 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License as published by the 7 * Free Software Foundation; either version 2 of the License, or (at your 8 * option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, but 11 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 12 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software Foundation, 17 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 18 * 19 * Ported to 834x by Randy Vinson <rvinson@mvista.com> using code provided 20 * by Hunter Wu. 21 * Power Management support by Dave Liu <daveliu@freescale.com>, 22 * Jerry Huang <Chang-Ming.Huang@freescale.com> and 23 * Anton Vorontsov <avorontsov@ru.mvista.com>. 24 */ 25 26 #include <linux/kernel.h> 27 #include <linux/types.h> 28 #include <linux/delay.h> 29 #include <linux/pm.h> 30 #include <linux/platform_device.h> 31 #include <linux/fsl_devices.h> 32 33 #include "ehci-fsl.h" 34 35 /* configure so an HC device and id are always provided */ 36 /* always called with process context; sleeping is OK */ 37 38 /** 39 * usb_hcd_fsl_probe - initialize FSL-based HCDs 40 * @drvier: Driver to be used for this HCD 41 * @pdev: USB Host Controller being probed 42 * Context: !in_interrupt() 43 * 44 * Allocates basic resources for this USB host controller. 45 * 46 */ 47 static int usb_hcd_fsl_probe(const struct hc_driver *driver, 48 struct platform_device *pdev) 49 { 50 struct fsl_usb2_platform_data *pdata; 51 struct usb_hcd *hcd; 52 struct resource *res; 53 int irq; 54 int retval; 55 56 pr_debug("initializing FSL-SOC USB Controller\n"); 57 58 /* Need platform data for setup */ 59 pdata = (struct fsl_usb2_platform_data *)pdev->dev.platform_data; 60 if (!pdata) { 61 dev_err(&pdev->dev, 62 "No platform data for %s.\n", dev_name(&pdev->dev)); 63 return -ENODEV; 64 } 65 66 /* 67 * This is a host mode driver, verify that we're supposed to be 68 * in host mode. 69 */ 70 if (!((pdata->operating_mode == FSL_USB2_DR_HOST) || 71 (pdata->operating_mode == FSL_USB2_MPH_HOST) || 72 (pdata->operating_mode == FSL_USB2_DR_OTG))) { 73 dev_err(&pdev->dev, 74 "Non Host Mode configured for %s. Wrong driver linked.\n", 75 dev_name(&pdev->dev)); 76 return -ENODEV; 77 } 78 79 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 80 if (!res) { 81 dev_err(&pdev->dev, 82 "Found HC with no IRQ. Check %s setup!\n", 83 dev_name(&pdev->dev)); 84 return -ENODEV; 85 } 86 irq = res->start; 87 88 hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev)); 89 if (!hcd) { 90 retval = -ENOMEM; 91 goto err1; 92 } 93 94 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 95 if (!res) { 96 dev_err(&pdev->dev, 97 "Found HC with no register addr. Check %s setup!\n", 98 dev_name(&pdev->dev)); 99 retval = -ENODEV; 100 goto err2; 101 } 102 hcd->rsrc_start = res->start; 103 hcd->rsrc_len = resource_size(res); 104 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, 105 driver->description)) { 106 dev_dbg(&pdev->dev, "controller already in use\n"); 107 retval = -EBUSY; 108 goto err2; 109 } 110 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); 111 112 if (hcd->regs == NULL) { 113 dev_dbg(&pdev->dev, "error mapping memory\n"); 114 retval = -EFAULT; 115 goto err3; 116 } 117 118 pdata->regs = hcd->regs; 119 120 if (pdata->power_budget) 121 hcd->power_budget = pdata->power_budget; 122 123 /* 124 * do platform specific init: check the clock, grab/config pins, etc. 125 */ 126 if (pdata->init && pdata->init(pdev)) { 127 retval = -ENODEV; 128 goto err4; 129 } 130 131 /* Enable USB controller, 83xx or 8536 */ 132 if (pdata->have_sysif_regs) 133 setbits32(hcd->regs + FSL_SOC_USB_CTRL, 0x4); 134 135 /* Don't need to set host mode here. It will be done by tdi_reset() */ 136 137 retval = usb_add_hcd(hcd, irq, IRQF_SHARED); 138 if (retval != 0) 139 goto err4; 140 141 #ifdef CONFIG_USB_OTG 142 if (pdata->operating_mode == FSL_USB2_DR_OTG) { 143 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 144 145 ehci->transceiver = usb_get_transceiver(); 146 dev_dbg(&pdev->dev, "hcd=0x%p ehci=0x%p, transceiver=0x%p\n", 147 hcd, ehci, ehci->transceiver); 148 149 if (ehci->transceiver) { 150 retval = otg_set_host(ehci->transceiver->otg, 151 &ehci_to_hcd(ehci)->self); 152 if (retval) { 153 usb_put_transceiver(ehci->transceiver); 154 goto err4; 155 } 156 } else { 157 dev_err(&pdev->dev, "can't find transceiver\n"); 158 retval = -ENODEV; 159 goto err4; 160 } 161 } 162 #endif 163 return retval; 164 165 err4: 166 iounmap(hcd->regs); 167 err3: 168 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 169 err2: 170 usb_put_hcd(hcd); 171 err1: 172 dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), retval); 173 if (pdata->exit) 174 pdata->exit(pdev); 175 return retval; 176 } 177 178 /* may be called without controller electrically present */ 179 /* may be called with controller, bus, and devices active */ 180 181 /** 182 * usb_hcd_fsl_remove - shutdown processing for FSL-based HCDs 183 * @dev: USB Host Controller being removed 184 * Context: !in_interrupt() 185 * 186 * Reverses the effect of usb_hcd_fsl_probe(). 187 * 188 */ 189 static void usb_hcd_fsl_remove(struct usb_hcd *hcd, 190 struct platform_device *pdev) 191 { 192 struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data; 193 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 194 195 if (ehci->transceiver) { 196 otg_set_host(ehci->transceiver->otg, NULL); 197 usb_put_transceiver(ehci->transceiver); 198 } 199 200 usb_remove_hcd(hcd); 201 202 /* 203 * do platform specific un-initialization: 204 * release iomux pins, disable clock, etc. 205 */ 206 if (pdata->exit) 207 pdata->exit(pdev); 208 iounmap(hcd->regs); 209 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 210 usb_put_hcd(hcd); 211 } 212 213 static void ehci_fsl_setup_phy(struct usb_hcd *hcd, 214 enum fsl_usb2_phy_modes phy_mode, 215 unsigned int port_offset) 216 { 217 u32 portsc, temp; 218 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 219 void __iomem *non_ehci = hcd->regs; 220 struct device *dev = hcd->self.controller; 221 struct fsl_usb2_platform_data *pdata = dev->platform_data; 222 223 if (pdata->controller_ver < 0) { 224 dev_warn(hcd->self.controller, "Could not get controller version\n"); 225 return; 226 } 227 228 portsc = ehci_readl(ehci, &ehci->regs->port_status[port_offset]); 229 portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW); 230 231 switch (phy_mode) { 232 case FSL_USB2_PHY_ULPI: 233 if (pdata->controller_ver) { 234 /* controller version 1.6 or above */ 235 temp = in_be32(non_ehci + FSL_SOC_USB_CTRL); 236 out_be32(non_ehci + FSL_SOC_USB_CTRL, temp | 237 USB_CTRL_USB_EN | ULPI_PHY_CLK_SEL); 238 } 239 portsc |= PORT_PTS_ULPI; 240 break; 241 case FSL_USB2_PHY_SERIAL: 242 portsc |= PORT_PTS_SERIAL; 243 break; 244 case FSL_USB2_PHY_UTMI_WIDE: 245 portsc |= PORT_PTS_PTW; 246 /* fall through */ 247 case FSL_USB2_PHY_UTMI: 248 if (pdata->controller_ver) { 249 /* controller version 1.6 or above */ 250 temp = in_be32(non_ehci + FSL_SOC_USB_CTRL); 251 out_be32(non_ehci + FSL_SOC_USB_CTRL, temp | 252 UTMI_PHY_EN | USB_CTRL_USB_EN); 253 mdelay(FSL_UTMI_PHY_DLY); /* Delay for UTMI PHY CLK to 254 become stable - 10ms*/ 255 } 256 /* enable UTMI PHY */ 257 if (pdata->have_sysif_regs) 258 setbits32(non_ehci + FSL_SOC_USB_CTRL, 259 CTRL_UTMI_PHY_EN); 260 portsc |= PORT_PTS_UTMI; 261 break; 262 case FSL_USB2_PHY_NONE: 263 break; 264 } 265 ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]); 266 } 267 268 static void ehci_fsl_usb_setup(struct ehci_hcd *ehci) 269 { 270 struct usb_hcd *hcd = ehci_to_hcd(ehci); 271 struct fsl_usb2_platform_data *pdata; 272 void __iomem *non_ehci = hcd->regs; 273 u32 temp; 274 275 pdata = hcd->self.controller->platform_data; 276 277 /* Enable PHY interface in the control reg. */ 278 if (pdata->have_sysif_regs) { 279 temp = in_be32(non_ehci + FSL_SOC_USB_CTRL); 280 out_be32(non_ehci + FSL_SOC_USB_CTRL, temp | 0x00000004); 281 282 /* 283 * Turn on cache snooping hardware, since some PowerPC platforms 284 * wholly rely on hardware to deal with cache coherent 285 */ 286 287 /* Setup Snooping for all the 4GB space */ 288 /* SNOOP1 starts from 0x0, size 2G */ 289 out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0 | SNOOP_SIZE_2GB); 290 /* SNOOP2 starts from 0x80000000, size 2G */ 291 out_be32(non_ehci + FSL_SOC_USB_SNOOP2, 0x80000000 | SNOOP_SIZE_2GB); 292 } 293 294 if ((pdata->operating_mode == FSL_USB2_DR_HOST) || 295 (pdata->operating_mode == FSL_USB2_DR_OTG)) 296 ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0); 297 298 if (pdata->operating_mode == FSL_USB2_MPH_HOST) { 299 unsigned int chip, rev, svr; 300 301 svr = mfspr(SPRN_SVR); 302 chip = svr >> 16; 303 rev = (svr >> 4) & 0xf; 304 305 /* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */ 306 if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055)) 307 ehci->has_fsl_port_bug = 1; 308 309 if (pdata->port_enables & FSL_USB2_PORT0_ENABLED) 310 ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0); 311 if (pdata->port_enables & FSL_USB2_PORT1_ENABLED) 312 ehci_fsl_setup_phy(hcd, pdata->phy_mode, 1); 313 } 314 315 if (pdata->have_sysif_regs) { 316 #ifdef CONFIG_PPC_85xx 317 out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x00000008); 318 out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000080); 319 #else 320 out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x0000000c); 321 out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000040); 322 #endif 323 out_be32(non_ehci + FSL_SOC_USB_SICTRL, 0x00000001); 324 } 325 } 326 327 /* called after powerup, by probe or system-pm "wakeup" */ 328 static int ehci_fsl_reinit(struct ehci_hcd *ehci) 329 { 330 ehci_fsl_usb_setup(ehci); 331 ehci_port_power(ehci, 0); 332 333 return 0; 334 } 335 336 /* called during probe() after chip reset completes */ 337 static int ehci_fsl_setup(struct usb_hcd *hcd) 338 { 339 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 340 int retval; 341 struct fsl_usb2_platform_data *pdata; 342 struct device *dev; 343 344 dev = hcd->self.controller; 345 pdata = hcd->self.controller->platform_data; 346 ehci->big_endian_desc = pdata->big_endian_desc; 347 ehci->big_endian_mmio = pdata->big_endian_mmio; 348 349 /* EHCI registers start at offset 0x100 */ 350 ehci->caps = hcd->regs + 0x100; 351 ehci->regs = hcd->regs + 0x100 + 352 HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase)); 353 dbg_hcs_params(ehci, "reset"); 354 dbg_hcc_params(ehci, "reset"); 355 356 /* cache this readonly data; minimize chip reads */ 357 ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); 358 359 hcd->has_tt = 1; 360 361 retval = ehci_halt(ehci); 362 if (retval) 363 return retval; 364 365 /* data structure init */ 366 retval = ehci_init(hcd); 367 if (retval) 368 return retval; 369 370 ehci->sbrn = 0x20; 371 372 ehci_reset(ehci); 373 374 if (of_device_is_compatible(dev->parent->of_node, 375 "fsl,mpc5121-usb2-dr")) { 376 /* 377 * set SBUSCFG:AHBBRST so that control msgs don't 378 * fail when doing heavy PATA writes. 379 */ 380 ehci_writel(ehci, SBUSCFG_INCR8, 381 hcd->regs + FSL_SOC_USB_SBUSCFG); 382 } 383 384 retval = ehci_fsl_reinit(ehci); 385 return retval; 386 } 387 388 struct ehci_fsl { 389 struct ehci_hcd ehci; 390 391 #ifdef CONFIG_PM 392 /* Saved USB PHY settings, need to restore after deep sleep. */ 393 u32 usb_ctrl; 394 #endif 395 }; 396 397 #ifdef CONFIG_PM 398 399 #ifdef CONFIG_PPC_MPC512x 400 static int ehci_fsl_mpc512x_drv_suspend(struct device *dev) 401 { 402 struct usb_hcd *hcd = dev_get_drvdata(dev); 403 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 404 struct fsl_usb2_platform_data *pdata = dev->platform_data; 405 u32 tmp; 406 407 #ifdef DEBUG 408 u32 mode = ehci_readl(ehci, hcd->regs + FSL_SOC_USB_USBMODE); 409 mode &= USBMODE_CM_MASK; 410 tmp = ehci_readl(ehci, hcd->regs + 0x140); /* usbcmd */ 411 412 dev_dbg(dev, "suspend=%d already_suspended=%d " 413 "mode=%d usbcmd %08x\n", pdata->suspended, 414 pdata->already_suspended, mode, tmp); 415 #endif 416 417 /* 418 * If the controller is already suspended, then this must be a 419 * PM suspend. Remember this fact, so that we will leave the 420 * controller suspended at PM resume time. 421 */ 422 if (pdata->suspended) { 423 dev_dbg(dev, "already suspended, leaving early\n"); 424 pdata->already_suspended = 1; 425 return 0; 426 } 427 428 dev_dbg(dev, "suspending...\n"); 429 430 ehci->rh_state = EHCI_RH_SUSPENDED; 431 dev->power.power_state = PMSG_SUSPEND; 432 433 /* ignore non-host interrupts */ 434 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 435 436 /* stop the controller */ 437 tmp = ehci_readl(ehci, &ehci->regs->command); 438 tmp &= ~CMD_RUN; 439 ehci_writel(ehci, tmp, &ehci->regs->command); 440 441 /* save EHCI registers */ 442 pdata->pm_command = ehci_readl(ehci, &ehci->regs->command); 443 pdata->pm_command &= ~CMD_RUN; 444 pdata->pm_status = ehci_readl(ehci, &ehci->regs->status); 445 pdata->pm_intr_enable = ehci_readl(ehci, &ehci->regs->intr_enable); 446 pdata->pm_frame_index = ehci_readl(ehci, &ehci->regs->frame_index); 447 pdata->pm_segment = ehci_readl(ehci, &ehci->regs->segment); 448 pdata->pm_frame_list = ehci_readl(ehci, &ehci->regs->frame_list); 449 pdata->pm_async_next = ehci_readl(ehci, &ehci->regs->async_next); 450 pdata->pm_configured_flag = 451 ehci_readl(ehci, &ehci->regs->configured_flag); 452 pdata->pm_portsc = ehci_readl(ehci, &ehci->regs->port_status[0]); 453 pdata->pm_usbgenctrl = ehci_readl(ehci, 454 hcd->regs + FSL_SOC_USB_USBGENCTRL); 455 456 /* clear the W1C bits */ 457 pdata->pm_portsc &= cpu_to_hc32(ehci, ~PORT_RWC_BITS); 458 459 pdata->suspended = 1; 460 461 /* clear PP to cut power to the port */ 462 tmp = ehci_readl(ehci, &ehci->regs->port_status[0]); 463 tmp &= ~PORT_POWER; 464 ehci_writel(ehci, tmp, &ehci->regs->port_status[0]); 465 466 return 0; 467 } 468 469 static int ehci_fsl_mpc512x_drv_resume(struct device *dev) 470 { 471 struct usb_hcd *hcd = dev_get_drvdata(dev); 472 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 473 struct fsl_usb2_platform_data *pdata = dev->platform_data; 474 u32 tmp; 475 476 dev_dbg(dev, "suspend=%d already_suspended=%d\n", 477 pdata->suspended, pdata->already_suspended); 478 479 /* 480 * If the controller was already suspended at suspend time, 481 * then don't resume it now. 482 */ 483 if (pdata->already_suspended) { 484 dev_dbg(dev, "already suspended, leaving early\n"); 485 pdata->already_suspended = 0; 486 return 0; 487 } 488 489 if (!pdata->suspended) { 490 dev_dbg(dev, "not suspended, leaving early\n"); 491 return 0; 492 } 493 494 pdata->suspended = 0; 495 496 dev_dbg(dev, "resuming...\n"); 497 498 /* set host mode */ 499 tmp = USBMODE_CM_HOST | (pdata->es ? USBMODE_ES : 0); 500 ehci_writel(ehci, tmp, hcd->regs + FSL_SOC_USB_USBMODE); 501 502 ehci_writel(ehci, pdata->pm_usbgenctrl, 503 hcd->regs + FSL_SOC_USB_USBGENCTRL); 504 ehci_writel(ehci, ISIPHYCTRL_PXE | ISIPHYCTRL_PHYE, 505 hcd->regs + FSL_SOC_USB_ISIPHYCTRL); 506 507 ehci_writel(ehci, SBUSCFG_INCR8, hcd->regs + FSL_SOC_USB_SBUSCFG); 508 509 /* restore EHCI registers */ 510 ehci_writel(ehci, pdata->pm_command, &ehci->regs->command); 511 ehci_writel(ehci, pdata->pm_intr_enable, &ehci->regs->intr_enable); 512 ehci_writel(ehci, pdata->pm_frame_index, &ehci->regs->frame_index); 513 ehci_writel(ehci, pdata->pm_segment, &ehci->regs->segment); 514 ehci_writel(ehci, pdata->pm_frame_list, &ehci->regs->frame_list); 515 ehci_writel(ehci, pdata->pm_async_next, &ehci->regs->async_next); 516 ehci_writel(ehci, pdata->pm_configured_flag, 517 &ehci->regs->configured_flag); 518 ehci_writel(ehci, pdata->pm_portsc, &ehci->regs->port_status[0]); 519 520 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 521 ehci->rh_state = EHCI_RH_RUNNING; 522 dev->power.power_state = PMSG_ON; 523 524 tmp = ehci_readl(ehci, &ehci->regs->command); 525 tmp |= CMD_RUN; 526 ehci_writel(ehci, tmp, &ehci->regs->command); 527 528 usb_hcd_resume_root_hub(hcd); 529 530 return 0; 531 } 532 #else 533 static inline int ehci_fsl_mpc512x_drv_suspend(struct device *dev) 534 { 535 return 0; 536 } 537 538 static inline int ehci_fsl_mpc512x_drv_resume(struct device *dev) 539 { 540 return 0; 541 } 542 #endif /* CONFIG_PPC_MPC512x */ 543 544 static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd) 545 { 546 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 547 548 return container_of(ehci, struct ehci_fsl, ehci); 549 } 550 551 static int ehci_fsl_drv_suspend(struct device *dev) 552 { 553 struct usb_hcd *hcd = dev_get_drvdata(dev); 554 struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd); 555 void __iomem *non_ehci = hcd->regs; 556 557 if (of_device_is_compatible(dev->parent->of_node, 558 "fsl,mpc5121-usb2-dr")) { 559 return ehci_fsl_mpc512x_drv_suspend(dev); 560 } 561 562 ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd), 563 device_may_wakeup(dev)); 564 if (!fsl_deep_sleep()) 565 return 0; 566 567 ehci_fsl->usb_ctrl = in_be32(non_ehci + FSL_SOC_USB_CTRL); 568 return 0; 569 } 570 571 static int ehci_fsl_drv_resume(struct device *dev) 572 { 573 struct usb_hcd *hcd = dev_get_drvdata(dev); 574 struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd); 575 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 576 void __iomem *non_ehci = hcd->regs; 577 578 if (of_device_is_compatible(dev->parent->of_node, 579 "fsl,mpc5121-usb2-dr")) { 580 return ehci_fsl_mpc512x_drv_resume(dev); 581 } 582 583 ehci_prepare_ports_for_controller_resume(ehci); 584 if (!fsl_deep_sleep()) 585 return 0; 586 587 usb_root_hub_lost_power(hcd->self.root_hub); 588 589 /* Restore USB PHY settings and enable the controller. */ 590 out_be32(non_ehci + FSL_SOC_USB_CTRL, ehci_fsl->usb_ctrl); 591 592 ehci_reset(ehci); 593 ehci_fsl_reinit(ehci); 594 595 return 0; 596 } 597 598 static int ehci_fsl_drv_restore(struct device *dev) 599 { 600 struct usb_hcd *hcd = dev_get_drvdata(dev); 601 602 usb_root_hub_lost_power(hcd->self.root_hub); 603 return 0; 604 } 605 606 static struct dev_pm_ops ehci_fsl_pm_ops = { 607 .suspend = ehci_fsl_drv_suspend, 608 .resume = ehci_fsl_drv_resume, 609 .restore = ehci_fsl_drv_restore, 610 }; 611 612 #define EHCI_FSL_PM_OPS (&ehci_fsl_pm_ops) 613 #else 614 #define EHCI_FSL_PM_OPS NULL 615 #endif /* CONFIG_PM */ 616 617 #ifdef CONFIG_USB_OTG 618 static int ehci_start_port_reset(struct usb_hcd *hcd, unsigned port) 619 { 620 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 621 u32 status; 622 623 if (!port) 624 return -EINVAL; 625 626 port--; 627 628 /* start port reset before HNP protocol time out */ 629 status = readl(&ehci->regs->port_status[port]); 630 if (!(status & PORT_CONNECT)) 631 return -ENODEV; 632 633 /* khubd will finish the reset later */ 634 if (ehci_is_TDI(ehci)) { 635 writel(PORT_RESET | 636 (status & ~(PORT_CSC | PORT_PEC | PORT_OCC)), 637 &ehci->regs->port_status[port]); 638 } else { 639 writel(PORT_RESET, &ehci->regs->port_status[port]); 640 } 641 642 return 0; 643 } 644 #else 645 #define ehci_start_port_reset NULL 646 #endif /* CONFIG_USB_OTG */ 647 648 649 static const struct hc_driver ehci_fsl_hc_driver = { 650 .description = hcd_name, 651 .product_desc = "Freescale On-Chip EHCI Host Controller", 652 .hcd_priv_size = sizeof(struct ehci_fsl), 653 654 /* 655 * generic hardware linkage 656 */ 657 .irq = ehci_irq, 658 .flags = HCD_USB2 | HCD_MEMORY, 659 660 /* 661 * basic lifecycle operations 662 */ 663 .reset = ehci_fsl_setup, 664 .start = ehci_run, 665 .stop = ehci_stop, 666 .shutdown = ehci_shutdown, 667 668 /* 669 * managing i/o requests and associated device resources 670 */ 671 .urb_enqueue = ehci_urb_enqueue, 672 .urb_dequeue = ehci_urb_dequeue, 673 .endpoint_disable = ehci_endpoint_disable, 674 .endpoint_reset = ehci_endpoint_reset, 675 676 /* 677 * scheduling support 678 */ 679 .get_frame_number = ehci_get_frame, 680 681 /* 682 * root hub support 683 */ 684 .hub_status_data = ehci_hub_status_data, 685 .hub_control = ehci_hub_control, 686 .bus_suspend = ehci_bus_suspend, 687 .bus_resume = ehci_bus_resume, 688 .start_port_reset = ehci_start_port_reset, 689 .relinquish_port = ehci_relinquish_port, 690 .port_handed_over = ehci_port_handed_over, 691 692 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, 693 }; 694 695 static int ehci_fsl_drv_probe(struct platform_device *pdev) 696 { 697 if (usb_disabled()) 698 return -ENODEV; 699 700 /* FIXME we only want one one probe() not two */ 701 return usb_hcd_fsl_probe(&ehci_fsl_hc_driver, pdev); 702 } 703 704 static int ehci_fsl_drv_remove(struct platform_device *pdev) 705 { 706 struct usb_hcd *hcd = platform_get_drvdata(pdev); 707 708 /* FIXME we only want one one remove() not two */ 709 usb_hcd_fsl_remove(hcd, pdev); 710 return 0; 711 } 712 713 MODULE_ALIAS("platform:fsl-ehci"); 714 715 static struct platform_driver ehci_fsl_driver = { 716 .probe = ehci_fsl_drv_probe, 717 .remove = ehci_fsl_drv_remove, 718 .shutdown = usb_hcd_platform_shutdown, 719 .driver = { 720 .name = "fsl-ehci", 721 .pm = EHCI_FSL_PM_OPS, 722 }, 723 }; 724