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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 = (struct fsl_usb2_platform_data *)pdev->dev.platform_data;
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         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
106                                 driver->description)) {
107                 dev_dbg(&pdev->dev, "controller already in use\n");
108                 retval = -EBUSY;
109                 goto err2;
110         }
111         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
112
113         if (hcd->regs == NULL) {
114                 dev_dbg(&pdev->dev, "error mapping memory\n");
115                 retval = -EFAULT;
116                 goto err3;
117         }
118
119         pdata->regs = hcd->regs;
120
121         if (pdata->power_budget)
122                 hcd->power_budget = pdata->power_budget;
123
124         /*
125          * do platform specific init: check the clock, grab/config pins, etc.
126          */
127         if (pdata->init && pdata->init(pdev)) {
128                 retval = -ENODEV;
129                 goto err4;
130         }
131
132         /* Enable USB controller, 83xx or 8536 */
133         if (pdata->have_sysif_regs)
134                 setbits32(hcd->regs + FSL_SOC_USB_CTRL, 0x4);
135
136         /* Don't need to set host mode here. It will be done by tdi_reset() */
137
138         retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
139         if (retval != 0)
140                 goto err4;
141
142 #ifdef CONFIG_USB_OTG
143         if (pdata->operating_mode == FSL_USB2_DR_OTG) {
144                 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
145
146                 hcd->phy = usb_get_phy(USB_PHY_TYPE_USB2);
147                 dev_dbg(&pdev->dev, "hcd=0x%p  ehci=0x%p, phy=0x%p\n",
148                         hcd, ehci, hcd->phy);
149
150                 if (!IS_ERR_OR_NULL(hcd->phy)) {
151                         retval = otg_set_host(hcd->phy->otg,
152                                               &ehci_to_hcd(ehci)->self);
153                         if (retval) {
154                                 usb_put_phy(hcd->phy);
155                                 goto err4;
156                         }
157                 } else {
158                         dev_err(&pdev->dev, "can't find phy\n");
159                         retval = -ENODEV;
160                         goto err4;
161                 }
162         }
163 #endif
164         return retval;
165
166       err4:
167         iounmap(hcd->regs);
168       err3:
169         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
170       err2:
171         usb_put_hcd(hcd);
172       err1:
173         dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), retval);
174         if (pdata->exit)
175                 pdata->exit(pdev);
176         return retval;
177 }
178
179 /* may be called without controller electrically present */
180 /* may be called with controller, bus, and devices active */
181
182 /**
183  * usb_hcd_fsl_remove - shutdown processing for FSL-based HCDs
184  * @dev: USB Host Controller being removed
185  * Context: !in_interrupt()
186  *
187  * Reverses the effect of usb_hcd_fsl_probe().
188  *
189  */
190 static void usb_hcd_fsl_remove(struct usb_hcd *hcd,
191                                struct platform_device *pdev)
192 {
193         struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
194
195         if (!IS_ERR_OR_NULL(hcd->phy)) {
196                 otg_set_host(hcd->phy->otg, NULL);
197                 usb_put_phy(hcd->phy);
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 int 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;
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 -ENODEV;
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                         setbits32(non_ehci + FSL_SOC_USB_CTRL,
236                                         ULPI_PHY_CLK_SEL);
237                         /*
238                          * Due to controller issue of PHY_CLK_VALID in ULPI
239                          * mode, we set USB_CTRL_USB_EN before checking
240                          * PHY_CLK_VALID, otherwise PHY_CLK_VALID doesn't work.
241                          */
242                         clrsetbits_be32(non_ehci + FSL_SOC_USB_CTRL,
243                                         UTMI_PHY_EN, USB_CTRL_USB_EN);
244                 }
245                 portsc |= PORT_PTS_ULPI;
246                 break;
247         case FSL_USB2_PHY_SERIAL:
248                 portsc |= PORT_PTS_SERIAL;
249                 break;
250         case FSL_USB2_PHY_UTMI_WIDE:
251                 portsc |= PORT_PTS_PTW;
252                 /* fall through */
253         case FSL_USB2_PHY_UTMI:
254                 if (pdata->controller_ver) {
255                         /* controller version 1.6 or above */
256                         setbits32(non_ehci + FSL_SOC_USB_CTRL, UTMI_PHY_EN);
257                         mdelay(FSL_UTMI_PHY_DLY);  /* Delay for UTMI PHY CLK to
258                                                 become stable - 10ms*/
259                 }
260                 /* enable UTMI PHY */
261                 if (pdata->have_sysif_regs)
262                         setbits32(non_ehci + FSL_SOC_USB_CTRL,
263                                   CTRL_UTMI_PHY_EN);
264                 portsc |= PORT_PTS_UTMI;
265                 break;
266         case FSL_USB2_PHY_NONE:
267                 break;
268         }
269
270         if (pdata->controller_ver && (phy_mode == FSL_USB2_PHY_ULPI)) {
271                 /* check PHY_CLK_VALID to get phy clk valid */
272                 if (!spin_event_timeout(in_be32(non_ehci + FSL_SOC_USB_CTRL) &
273                                 PHY_CLK_VALID, FSL_USB_PHY_CLK_TIMEOUT, 0)) {
274                         printk(KERN_WARNING "fsl-ehci: USB PHY clock invalid\n");
275                         return -EINVAL;
276                 }
277         }
278
279         ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]);
280
281         if (phy_mode != FSL_USB2_PHY_ULPI)
282                 setbits32(non_ehci + FSL_SOC_USB_CTRL, USB_CTRL_USB_EN);
283
284         return 0;
285 }
286
287 static int ehci_fsl_usb_setup(struct ehci_hcd *ehci)
288 {
289         struct usb_hcd *hcd = ehci_to_hcd(ehci);
290         struct fsl_usb2_platform_data *pdata;
291         void __iomem *non_ehci = hcd->regs;
292
293         pdata = hcd->self.controller->platform_data;
294
295         if (pdata->have_sysif_regs) {
296                 /*
297                 * Turn on cache snooping hardware, since some PowerPC platforms
298                 * wholly rely on hardware to deal with cache coherent
299                 */
300
301                 /* Setup Snooping for all the 4GB space */
302                 /* SNOOP1 starts from 0x0, size 2G */
303                 out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0 | SNOOP_SIZE_2GB);
304                 /* SNOOP2 starts from 0x80000000, size 2G */
305                 out_be32(non_ehci + FSL_SOC_USB_SNOOP2, 0x80000000 | SNOOP_SIZE_2GB);
306         }
307
308         if ((pdata->operating_mode == FSL_USB2_DR_HOST) ||
309                         (pdata->operating_mode == FSL_USB2_DR_OTG))
310                 if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0))
311                         return -EINVAL;
312
313         if (pdata->operating_mode == FSL_USB2_MPH_HOST) {
314                 unsigned int chip, rev, svr;
315
316                 svr = mfspr(SPRN_SVR);
317                 chip = svr >> 16;
318                 rev = (svr >> 4) & 0xf;
319
320                 /* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */
321                 if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055))
322                         ehci->has_fsl_port_bug = 1;
323
324                 if (pdata->port_enables & FSL_USB2_PORT0_ENABLED)
325                         if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0))
326                                 return -EINVAL;
327
328                 if (pdata->port_enables & FSL_USB2_PORT1_ENABLED)
329                         if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 1))
330                                 return -EINVAL;
331         }
332
333         if (pdata->have_sysif_regs) {
334 #ifdef CONFIG_FSL_SOC_BOOKE
335                 out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x00000008);
336                 out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000080);
337 #else
338                 out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x0000000c);
339                 out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000040);
340 #endif
341                 out_be32(non_ehci + FSL_SOC_USB_SICTRL, 0x00000001);
342         }
343
344         return 0;
345 }
346
347 /* called after powerup, by probe or system-pm "wakeup" */
348 static int ehci_fsl_reinit(struct ehci_hcd *ehci)
349 {
350         if (ehci_fsl_usb_setup(ehci))
351                 return -EINVAL;
352
353         return 0;
354 }
355
356 /* called during probe() after chip reset completes */
357 static int ehci_fsl_setup(struct usb_hcd *hcd)
358 {
359         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
360         int retval;
361         struct fsl_usb2_platform_data *pdata;
362         struct device *dev;
363
364         dev = hcd->self.controller;
365         pdata = hcd->self.controller->platform_data;
366         ehci->big_endian_desc = pdata->big_endian_desc;
367         ehci->big_endian_mmio = pdata->big_endian_mmio;
368
369         /* EHCI registers start at offset 0x100 */
370         ehci->caps = hcd->regs + 0x100;
371
372         hcd->has_tt = 1;
373
374         retval = ehci_setup(hcd);
375         if (retval)
376                 return retval;
377
378         if (of_device_is_compatible(dev->parent->of_node,
379                                     "fsl,mpc5121-usb2-dr")) {
380                 /*
381                  * set SBUSCFG:AHBBRST so that control msgs don't
382                  * fail when doing heavy PATA writes.
383                  */
384                 ehci_writel(ehci, SBUSCFG_INCR8,
385                             hcd->regs + FSL_SOC_USB_SBUSCFG);
386         }
387
388         retval = ehci_fsl_reinit(ehci);
389         return retval;
390 }
391
392 struct ehci_fsl {
393         struct ehci_hcd ehci;
394
395 #ifdef CONFIG_PM
396         /* Saved USB PHY settings, need to restore after deep sleep. */
397         u32 usb_ctrl;
398 #endif
399 };
400
401 #ifdef CONFIG_PM
402
403 #ifdef CONFIG_PPC_MPC512x
404 static int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
405 {
406         struct usb_hcd *hcd = dev_get_drvdata(dev);
407         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
408         struct fsl_usb2_platform_data *pdata = dev->platform_data;
409         u32 tmp;
410
411 #ifdef DEBUG
412         u32 mode = ehci_readl(ehci, hcd->regs + FSL_SOC_USB_USBMODE);
413         mode &= USBMODE_CM_MASK;
414         tmp = ehci_readl(ehci, hcd->regs + 0x140);      /* usbcmd */
415
416         dev_dbg(dev, "suspend=%d already_suspended=%d "
417                 "mode=%d  usbcmd %08x\n", pdata->suspended,
418                 pdata->already_suspended, mode, tmp);
419 #endif
420
421         /*
422          * If the controller is already suspended, then this must be a
423          * PM suspend.  Remember this fact, so that we will leave the
424          * controller suspended at PM resume time.
425          */
426         if (pdata->suspended) {
427                 dev_dbg(dev, "already suspended, leaving early\n");
428                 pdata->already_suspended = 1;
429                 return 0;
430         }
431
432         dev_dbg(dev, "suspending...\n");
433
434         ehci->rh_state = EHCI_RH_SUSPENDED;
435         dev->power.power_state = PMSG_SUSPEND;
436
437         /* ignore non-host interrupts */
438         clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
439
440         /* stop the controller */
441         tmp = ehci_readl(ehci, &ehci->regs->command);
442         tmp &= ~CMD_RUN;
443         ehci_writel(ehci, tmp, &ehci->regs->command);
444
445         /* save EHCI registers */
446         pdata->pm_command = ehci_readl(ehci, &ehci->regs->command);
447         pdata->pm_command &= ~CMD_RUN;
448         pdata->pm_status  = ehci_readl(ehci, &ehci->regs->status);
449         pdata->pm_intr_enable  = ehci_readl(ehci, &ehci->regs->intr_enable);
450         pdata->pm_frame_index  = ehci_readl(ehci, &ehci->regs->frame_index);
451         pdata->pm_segment  = ehci_readl(ehci, &ehci->regs->segment);
452         pdata->pm_frame_list  = ehci_readl(ehci, &ehci->regs->frame_list);
453         pdata->pm_async_next  = ehci_readl(ehci, &ehci->regs->async_next);
454         pdata->pm_configured_flag  =
455                 ehci_readl(ehci, &ehci->regs->configured_flag);
456         pdata->pm_portsc = ehci_readl(ehci, &ehci->regs->port_status[0]);
457         pdata->pm_usbgenctrl = ehci_readl(ehci,
458                                           hcd->regs + FSL_SOC_USB_USBGENCTRL);
459
460         /* clear the W1C bits */
461         pdata->pm_portsc &= cpu_to_hc32(ehci, ~PORT_RWC_BITS);
462
463         pdata->suspended = 1;
464
465         /* clear PP to cut power to the port */
466         tmp = ehci_readl(ehci, &ehci->regs->port_status[0]);
467         tmp &= ~PORT_POWER;
468         ehci_writel(ehci, tmp, &ehci->regs->port_status[0]);
469
470         return 0;
471 }
472
473 static int ehci_fsl_mpc512x_drv_resume(struct device *dev)
474 {
475         struct usb_hcd *hcd = dev_get_drvdata(dev);
476         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
477         struct fsl_usb2_platform_data *pdata = dev->platform_data;
478         u32 tmp;
479
480         dev_dbg(dev, "suspend=%d already_suspended=%d\n",
481                 pdata->suspended, pdata->already_suspended);
482
483         /*
484          * If the controller was already suspended at suspend time,
485          * then don't resume it now.
486          */
487         if (pdata->already_suspended) {
488                 dev_dbg(dev, "already suspended, leaving early\n");
489                 pdata->already_suspended = 0;
490                 return 0;
491         }
492
493         if (!pdata->suspended) {
494                 dev_dbg(dev, "not suspended, leaving early\n");
495                 return 0;
496         }
497
498         pdata->suspended = 0;
499
500         dev_dbg(dev, "resuming...\n");
501
502         /* set host mode */
503         tmp = USBMODE_CM_HOST | (pdata->es ? USBMODE_ES : 0);
504         ehci_writel(ehci, tmp, hcd->regs + FSL_SOC_USB_USBMODE);
505
506         ehci_writel(ehci, pdata->pm_usbgenctrl,
507                     hcd->regs + FSL_SOC_USB_USBGENCTRL);
508         ehci_writel(ehci, ISIPHYCTRL_PXE | ISIPHYCTRL_PHYE,
509                     hcd->regs + FSL_SOC_USB_ISIPHYCTRL);
510
511         ehci_writel(ehci, SBUSCFG_INCR8, hcd->regs + FSL_SOC_USB_SBUSCFG);
512
513         /* restore EHCI registers */
514         ehci_writel(ehci, pdata->pm_command, &ehci->regs->command);
515         ehci_writel(ehci, pdata->pm_intr_enable, &ehci->regs->intr_enable);
516         ehci_writel(ehci, pdata->pm_frame_index, &ehci->regs->frame_index);
517         ehci_writel(ehci, pdata->pm_segment, &ehci->regs->segment);
518         ehci_writel(ehci, pdata->pm_frame_list, &ehci->regs->frame_list);
519         ehci_writel(ehci, pdata->pm_async_next, &ehci->regs->async_next);
520         ehci_writel(ehci, pdata->pm_configured_flag,
521                     &ehci->regs->configured_flag);
522         ehci_writel(ehci, pdata->pm_portsc, &ehci->regs->port_status[0]);
523
524         set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
525         ehci->rh_state = EHCI_RH_RUNNING;
526         dev->power.power_state = PMSG_ON;
527
528         tmp = ehci_readl(ehci, &ehci->regs->command);
529         tmp |= CMD_RUN;
530         ehci_writel(ehci, tmp, &ehci->regs->command);
531
532         usb_hcd_resume_root_hub(hcd);
533
534         return 0;
535 }
536 #else
537 static inline int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
538 {
539         return 0;
540 }
541
542 static inline int ehci_fsl_mpc512x_drv_resume(struct device *dev)
543 {
544         return 0;
545 }
546 #endif /* CONFIG_PPC_MPC512x */
547
548 static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd)
549 {
550         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
551
552         return container_of(ehci, struct ehci_fsl, ehci);
553 }
554
555 static int ehci_fsl_drv_suspend(struct device *dev)
556 {
557         struct usb_hcd *hcd = dev_get_drvdata(dev);
558         struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
559         void __iomem *non_ehci = hcd->regs;
560
561         if (of_device_is_compatible(dev->parent->of_node,
562                                     "fsl,mpc5121-usb2-dr")) {
563                 return ehci_fsl_mpc512x_drv_suspend(dev);
564         }
565
566         ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd),
567                         device_may_wakeup(dev));
568         if (!fsl_deep_sleep())
569                 return 0;
570
571         ehci_fsl->usb_ctrl = in_be32(non_ehci + FSL_SOC_USB_CTRL);
572         return 0;
573 }
574
575 static int ehci_fsl_drv_resume(struct device *dev)
576 {
577         struct usb_hcd *hcd = dev_get_drvdata(dev);
578         struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
579         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
580         void __iomem *non_ehci = hcd->regs;
581
582         if (of_device_is_compatible(dev->parent->of_node,
583                                     "fsl,mpc5121-usb2-dr")) {
584                 return ehci_fsl_mpc512x_drv_resume(dev);
585         }
586
587         ehci_prepare_ports_for_controller_resume(ehci);
588         if (!fsl_deep_sleep())
589                 return 0;
590
591         usb_root_hub_lost_power(hcd->self.root_hub);
592
593         /* Restore USB PHY settings and enable the controller. */
594         out_be32(non_ehci + FSL_SOC_USB_CTRL, ehci_fsl->usb_ctrl);
595
596         ehci_reset(ehci);
597         ehci_fsl_reinit(ehci);
598
599         return 0;
600 }
601
602 static int ehci_fsl_drv_restore(struct device *dev)
603 {
604         struct usb_hcd *hcd = dev_get_drvdata(dev);
605
606         usb_root_hub_lost_power(hcd->self.root_hub);
607         return 0;
608 }
609
610 static struct dev_pm_ops ehci_fsl_pm_ops = {
611         .suspend = ehci_fsl_drv_suspend,
612         .resume = ehci_fsl_drv_resume,
613         .restore = ehci_fsl_drv_restore,
614 };
615
616 #define EHCI_FSL_PM_OPS         (&ehci_fsl_pm_ops)
617 #else
618 #define EHCI_FSL_PM_OPS         NULL
619 #endif /* CONFIG_PM */
620
621 #ifdef CONFIG_USB_OTG
622 static int ehci_start_port_reset(struct usb_hcd *hcd, unsigned port)
623 {
624         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
625         u32 status;
626
627         if (!port)
628                 return -EINVAL;
629
630         port--;
631
632         /* start port reset before HNP protocol time out */
633         status = readl(&ehci->regs->port_status[port]);
634         if (!(status & PORT_CONNECT))
635                 return -ENODEV;
636
637         /* khubd will finish the reset later */
638         if (ehci_is_TDI(ehci)) {
639                 writel(PORT_RESET |
640                        (status & ~(PORT_CSC | PORT_PEC | PORT_OCC)),
641                        &ehci->regs->port_status[port]);
642         } else {
643                 writel(PORT_RESET, &ehci->regs->port_status[port]);
644         }
645
646         return 0;
647 }
648 #else
649 #define ehci_start_port_reset   NULL
650 #endif /* CONFIG_USB_OTG */
651
652
653 static const struct hc_driver ehci_fsl_hc_driver = {
654         .description = hcd_name,
655         .product_desc = "Freescale On-Chip EHCI Host Controller",
656         .hcd_priv_size = sizeof(struct ehci_fsl),
657
658         /*
659          * generic hardware linkage
660          */
661         .irq = ehci_irq,
662         .flags = HCD_USB2 | HCD_MEMORY,
663
664         /*
665          * basic lifecycle operations
666          */
667         .reset = ehci_fsl_setup,
668         .start = ehci_run,
669         .stop = ehci_stop,
670         .shutdown = ehci_shutdown,
671
672         /*
673          * managing i/o requests and associated device resources
674          */
675         .urb_enqueue = ehci_urb_enqueue,
676         .urb_dequeue = ehci_urb_dequeue,
677         .endpoint_disable = ehci_endpoint_disable,
678         .endpoint_reset = ehci_endpoint_reset,
679
680         /*
681          * scheduling support
682          */
683         .get_frame_number = ehci_get_frame,
684
685         /*
686          * root hub support
687          */
688         .hub_status_data = ehci_hub_status_data,
689         .hub_control = ehci_hub_control,
690         .bus_suspend = ehci_bus_suspend,
691         .bus_resume = ehci_bus_resume,
692         .start_port_reset = ehci_start_port_reset,
693         .relinquish_port = ehci_relinquish_port,
694         .port_handed_over = ehci_port_handed_over,
695
696         .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
697 };
698
699 static int ehci_fsl_drv_probe(struct platform_device *pdev)
700 {
701         if (usb_disabled())
702                 return -ENODEV;
703
704         /* FIXME we only want one one probe() not two */
705         return usb_hcd_fsl_probe(&ehci_fsl_hc_driver, pdev);
706 }
707
708 static int ehci_fsl_drv_remove(struct platform_device *pdev)
709 {
710         struct usb_hcd *hcd = platform_get_drvdata(pdev);
711
712         /* FIXME we only want one one remove() not two */
713         usb_hcd_fsl_remove(hcd, pdev);
714         return 0;
715 }
716
717 MODULE_ALIAS("platform:fsl-ehci");
718
719 static struct platform_driver ehci_fsl_driver = {
720         .probe = ehci_fsl_drv_probe,
721         .remove = ehci_fsl_drv_remove,
722         .shutdown = usb_hcd_platform_shutdown,
723         .driver = {
724                 .name = "fsl-ehci",
725                 .pm = EHCI_FSL_PM_OPS,
726         },
727 };