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USB: ehci-fsl: fix regression on mpc5121e
[~shefty/rdma-dev.git] / drivers / usb / host / ehci-fsl.c
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->have_sysif_regs && 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->have_sysif_regs && 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->have_sysif_regs && pdata->controller_ver &&
271             (phy_mode == FSL_USB2_PHY_ULPI)) {
272                 /* check PHY_CLK_VALID to get phy clk valid */
273                 if (!spin_event_timeout(in_be32(non_ehci + FSL_SOC_USB_CTRL) &
274                                 PHY_CLK_VALID, FSL_USB_PHY_CLK_TIMEOUT, 0)) {
275                         printk(KERN_WARNING "fsl-ehci: USB PHY clock invalid\n");
276                         return -EINVAL;
277                 }
278         }
279
280         ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]);
281
282         if (phy_mode != FSL_USB2_PHY_ULPI && pdata->have_sysif_regs)
283                 setbits32(non_ehci + FSL_SOC_USB_CTRL, USB_CTRL_USB_EN);
284
285         return 0;
286 }
287
288 static int ehci_fsl_usb_setup(struct ehci_hcd *ehci)
289 {
290         struct usb_hcd *hcd = ehci_to_hcd(ehci);
291         struct fsl_usb2_platform_data *pdata;
292         void __iomem *non_ehci = hcd->regs;
293
294         pdata = hcd->self.controller->platform_data;
295
296         if (pdata->have_sysif_regs) {
297                 /*
298                 * Turn on cache snooping hardware, since some PowerPC platforms
299                 * wholly rely on hardware to deal with cache coherent
300                 */
301
302                 /* Setup Snooping for all the 4GB space */
303                 /* SNOOP1 starts from 0x0, size 2G */
304                 out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0 | SNOOP_SIZE_2GB);
305                 /* SNOOP2 starts from 0x80000000, size 2G */
306                 out_be32(non_ehci + FSL_SOC_USB_SNOOP2, 0x80000000 | SNOOP_SIZE_2GB);
307         }
308
309         if ((pdata->operating_mode == FSL_USB2_DR_HOST) ||
310                         (pdata->operating_mode == FSL_USB2_DR_OTG))
311                 if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0))
312                         return -EINVAL;
313
314         if (pdata->operating_mode == FSL_USB2_MPH_HOST) {
315                 unsigned int chip, rev, svr;
316
317                 svr = mfspr(SPRN_SVR);
318                 chip = svr >> 16;
319                 rev = (svr >> 4) & 0xf;
320
321                 /* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */
322                 if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055))
323                         ehci->has_fsl_port_bug = 1;
324
325                 if (pdata->port_enables & FSL_USB2_PORT0_ENABLED)
326                         if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0))
327                                 return -EINVAL;
328
329                 if (pdata->port_enables & FSL_USB2_PORT1_ENABLED)
330                         if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 1))
331                                 return -EINVAL;
332         }
333
334         if (pdata->have_sysif_regs) {
335 #ifdef CONFIG_FSL_SOC_BOOKE
336                 out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x00000008);
337                 out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000080);
338 #else
339                 out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x0000000c);
340                 out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000040);
341 #endif
342                 out_be32(non_ehci + FSL_SOC_USB_SICTRL, 0x00000001);
343         }
344
345         return 0;
346 }
347
348 /* called after powerup, by probe or system-pm "wakeup" */
349 static int ehci_fsl_reinit(struct ehci_hcd *ehci)
350 {
351         if (ehci_fsl_usb_setup(ehci))
352                 return -EINVAL;
353
354         return 0;
355 }
356
357 /* called during probe() after chip reset completes */
358 static int ehci_fsl_setup(struct usb_hcd *hcd)
359 {
360         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
361         int retval;
362         struct fsl_usb2_platform_data *pdata;
363         struct device *dev;
364
365         dev = hcd->self.controller;
366         pdata = hcd->self.controller->platform_data;
367         ehci->big_endian_desc = pdata->big_endian_desc;
368         ehci->big_endian_mmio = pdata->big_endian_mmio;
369
370         /* EHCI registers start at offset 0x100 */
371         ehci->caps = hcd->regs + 0x100;
372
373         hcd->has_tt = 1;
374
375         retval = ehci_setup(hcd);
376         if (retval)
377                 return retval;
378
379         if (of_device_is_compatible(dev->parent->of_node,
380                                     "fsl,mpc5121-usb2-dr")) {
381                 /*
382                  * set SBUSCFG:AHBBRST so that control msgs don't
383                  * fail when doing heavy PATA writes.
384                  */
385                 ehci_writel(ehci, SBUSCFG_INCR8,
386                             hcd->regs + FSL_SOC_USB_SBUSCFG);
387         }
388
389         retval = ehci_fsl_reinit(ehci);
390         return retval;
391 }
392
393 struct ehci_fsl {
394         struct ehci_hcd ehci;
395
396 #ifdef CONFIG_PM
397         /* Saved USB PHY settings, need to restore after deep sleep. */
398         u32 usb_ctrl;
399 #endif
400 };
401
402 #ifdef CONFIG_PM
403
404 #ifdef CONFIG_PPC_MPC512x
405 static int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
406 {
407         struct usb_hcd *hcd = dev_get_drvdata(dev);
408         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
409         struct fsl_usb2_platform_data *pdata = dev->platform_data;
410         u32 tmp;
411
412 #ifdef DEBUG
413         u32 mode = ehci_readl(ehci, hcd->regs + FSL_SOC_USB_USBMODE);
414         mode &= USBMODE_CM_MASK;
415         tmp = ehci_readl(ehci, hcd->regs + 0x140);      /* usbcmd */
416
417         dev_dbg(dev, "suspend=%d already_suspended=%d "
418                 "mode=%d  usbcmd %08x\n", pdata->suspended,
419                 pdata->already_suspended, mode, tmp);
420 #endif
421
422         /*
423          * If the controller is already suspended, then this must be a
424          * PM suspend.  Remember this fact, so that we will leave the
425          * controller suspended at PM resume time.
426          */
427         if (pdata->suspended) {
428                 dev_dbg(dev, "already suspended, leaving early\n");
429                 pdata->already_suspended = 1;
430                 return 0;
431         }
432
433         dev_dbg(dev, "suspending...\n");
434
435         ehci->rh_state = EHCI_RH_SUSPENDED;
436         dev->power.power_state = PMSG_SUSPEND;
437
438         /* ignore non-host interrupts */
439         clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
440
441         /* stop the controller */
442         tmp = ehci_readl(ehci, &ehci->regs->command);
443         tmp &= ~CMD_RUN;
444         ehci_writel(ehci, tmp, &ehci->regs->command);
445
446         /* save EHCI registers */
447         pdata->pm_command = ehci_readl(ehci, &ehci->regs->command);
448         pdata->pm_command &= ~CMD_RUN;
449         pdata->pm_status  = ehci_readl(ehci, &ehci->regs->status);
450         pdata->pm_intr_enable  = ehci_readl(ehci, &ehci->regs->intr_enable);
451         pdata->pm_frame_index  = ehci_readl(ehci, &ehci->regs->frame_index);
452         pdata->pm_segment  = ehci_readl(ehci, &ehci->regs->segment);
453         pdata->pm_frame_list  = ehci_readl(ehci, &ehci->regs->frame_list);
454         pdata->pm_async_next  = ehci_readl(ehci, &ehci->regs->async_next);
455         pdata->pm_configured_flag  =
456                 ehci_readl(ehci, &ehci->regs->configured_flag);
457         pdata->pm_portsc = ehci_readl(ehci, &ehci->regs->port_status[0]);
458         pdata->pm_usbgenctrl = ehci_readl(ehci,
459                                           hcd->regs + FSL_SOC_USB_USBGENCTRL);
460
461         /* clear the W1C bits */
462         pdata->pm_portsc &= cpu_to_hc32(ehci, ~PORT_RWC_BITS);
463
464         pdata->suspended = 1;
465
466         /* clear PP to cut power to the port */
467         tmp = ehci_readl(ehci, &ehci->regs->port_status[0]);
468         tmp &= ~PORT_POWER;
469         ehci_writel(ehci, tmp, &ehci->regs->port_status[0]);
470
471         return 0;
472 }
473
474 static int ehci_fsl_mpc512x_drv_resume(struct device *dev)
475 {
476         struct usb_hcd *hcd = dev_get_drvdata(dev);
477         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
478         struct fsl_usb2_platform_data *pdata = dev->platform_data;
479         u32 tmp;
480
481         dev_dbg(dev, "suspend=%d already_suspended=%d\n",
482                 pdata->suspended, pdata->already_suspended);
483
484         /*
485          * If the controller was already suspended at suspend time,
486          * then don't resume it now.
487          */
488         if (pdata->already_suspended) {
489                 dev_dbg(dev, "already suspended, leaving early\n");
490                 pdata->already_suspended = 0;
491                 return 0;
492         }
493
494         if (!pdata->suspended) {
495                 dev_dbg(dev, "not suspended, leaving early\n");
496                 return 0;
497         }
498
499         pdata->suspended = 0;
500
501         dev_dbg(dev, "resuming...\n");
502
503         /* set host mode */
504         tmp = USBMODE_CM_HOST | (pdata->es ? USBMODE_ES : 0);
505         ehci_writel(ehci, tmp, hcd->regs + FSL_SOC_USB_USBMODE);
506
507         ehci_writel(ehci, pdata->pm_usbgenctrl,
508                     hcd->regs + FSL_SOC_USB_USBGENCTRL);
509         ehci_writel(ehci, ISIPHYCTRL_PXE | ISIPHYCTRL_PHYE,
510                     hcd->regs + FSL_SOC_USB_ISIPHYCTRL);
511
512         ehci_writel(ehci, SBUSCFG_INCR8, hcd->regs + FSL_SOC_USB_SBUSCFG);
513
514         /* restore EHCI registers */
515         ehci_writel(ehci, pdata->pm_command, &ehci->regs->command);
516         ehci_writel(ehci, pdata->pm_intr_enable, &ehci->regs->intr_enable);
517         ehci_writel(ehci, pdata->pm_frame_index, &ehci->regs->frame_index);
518         ehci_writel(ehci, pdata->pm_segment, &ehci->regs->segment);
519         ehci_writel(ehci, pdata->pm_frame_list, &ehci->regs->frame_list);
520         ehci_writel(ehci, pdata->pm_async_next, &ehci->regs->async_next);
521         ehci_writel(ehci, pdata->pm_configured_flag,
522                     &ehci->regs->configured_flag);
523         ehci_writel(ehci, pdata->pm_portsc, &ehci->regs->port_status[0]);
524
525         set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
526         ehci->rh_state = EHCI_RH_RUNNING;
527         dev->power.power_state = PMSG_ON;
528
529         tmp = ehci_readl(ehci, &ehci->regs->command);
530         tmp |= CMD_RUN;
531         ehci_writel(ehci, tmp, &ehci->regs->command);
532
533         usb_hcd_resume_root_hub(hcd);
534
535         return 0;
536 }
537 #else
538 static inline int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
539 {
540         return 0;
541 }
542
543 static inline int ehci_fsl_mpc512x_drv_resume(struct device *dev)
544 {
545         return 0;
546 }
547 #endif /* CONFIG_PPC_MPC512x */
548
549 static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd)
550 {
551         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
552
553         return container_of(ehci, struct ehci_fsl, ehci);
554 }
555
556 static int ehci_fsl_drv_suspend(struct device *dev)
557 {
558         struct usb_hcd *hcd = dev_get_drvdata(dev);
559         struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
560         void __iomem *non_ehci = hcd->regs;
561
562         if (of_device_is_compatible(dev->parent->of_node,
563                                     "fsl,mpc5121-usb2-dr")) {
564                 return ehci_fsl_mpc512x_drv_suspend(dev);
565         }
566
567         ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd),
568                         device_may_wakeup(dev));
569         if (!fsl_deep_sleep())
570                 return 0;
571
572         ehci_fsl->usb_ctrl = in_be32(non_ehci + FSL_SOC_USB_CTRL);
573         return 0;
574 }
575
576 static int ehci_fsl_drv_resume(struct device *dev)
577 {
578         struct usb_hcd *hcd = dev_get_drvdata(dev);
579         struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
580         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
581         void __iomem *non_ehci = hcd->regs;
582
583         if (of_device_is_compatible(dev->parent->of_node,
584                                     "fsl,mpc5121-usb2-dr")) {
585                 return ehci_fsl_mpc512x_drv_resume(dev);
586         }
587
588         ehci_prepare_ports_for_controller_resume(ehci);
589         if (!fsl_deep_sleep())
590                 return 0;
591
592         usb_root_hub_lost_power(hcd->self.root_hub);
593
594         /* Restore USB PHY settings and enable the controller. */
595         out_be32(non_ehci + FSL_SOC_USB_CTRL, ehci_fsl->usb_ctrl);
596
597         ehci_reset(ehci);
598         ehci_fsl_reinit(ehci);
599
600         return 0;
601 }
602
603 static int ehci_fsl_drv_restore(struct device *dev)
604 {
605         struct usb_hcd *hcd = dev_get_drvdata(dev);
606
607         usb_root_hub_lost_power(hcd->self.root_hub);
608         return 0;
609 }
610
611 static struct dev_pm_ops ehci_fsl_pm_ops = {
612         .suspend = ehci_fsl_drv_suspend,
613         .resume = ehci_fsl_drv_resume,
614         .restore = ehci_fsl_drv_restore,
615 };
616
617 #define EHCI_FSL_PM_OPS         (&ehci_fsl_pm_ops)
618 #else
619 #define EHCI_FSL_PM_OPS         NULL
620 #endif /* CONFIG_PM */
621
622 #ifdef CONFIG_USB_OTG
623 static int ehci_start_port_reset(struct usb_hcd *hcd, unsigned port)
624 {
625         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
626         u32 status;
627
628         if (!port)
629                 return -EINVAL;
630
631         port--;
632
633         /* start port reset before HNP protocol time out */
634         status = readl(&ehci->regs->port_status[port]);
635         if (!(status & PORT_CONNECT))
636                 return -ENODEV;
637
638         /* khubd will finish the reset later */
639         if (ehci_is_TDI(ehci)) {
640                 writel(PORT_RESET |
641                        (status & ~(PORT_CSC | PORT_PEC | PORT_OCC)),
642                        &ehci->regs->port_status[port]);
643         } else {
644                 writel(PORT_RESET, &ehci->regs->port_status[port]);
645         }
646
647         return 0;
648 }
649 #else
650 #define ehci_start_port_reset   NULL
651 #endif /* CONFIG_USB_OTG */
652
653
654 static const struct hc_driver ehci_fsl_hc_driver = {
655         .description = hcd_name,
656         .product_desc = "Freescale On-Chip EHCI Host Controller",
657         .hcd_priv_size = sizeof(struct ehci_fsl),
658
659         /*
660          * generic hardware linkage
661          */
662         .irq = ehci_irq,
663         .flags = HCD_USB2 | HCD_MEMORY,
664
665         /*
666          * basic lifecycle operations
667          */
668         .reset = ehci_fsl_setup,
669         .start = ehci_run,
670         .stop = ehci_stop,
671         .shutdown = ehci_shutdown,
672
673         /*
674          * managing i/o requests and associated device resources
675          */
676         .urb_enqueue = ehci_urb_enqueue,
677         .urb_dequeue = ehci_urb_dequeue,
678         .endpoint_disable = ehci_endpoint_disable,
679         .endpoint_reset = ehci_endpoint_reset,
680
681         /*
682          * scheduling support
683          */
684         .get_frame_number = ehci_get_frame,
685
686         /*
687          * root hub support
688          */
689         .hub_status_data = ehci_hub_status_data,
690         .hub_control = ehci_hub_control,
691         .bus_suspend = ehci_bus_suspend,
692         .bus_resume = ehci_bus_resume,
693         .start_port_reset = ehci_start_port_reset,
694         .relinquish_port = ehci_relinquish_port,
695         .port_handed_over = ehci_port_handed_over,
696
697         .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
698 };
699
700 static int ehci_fsl_drv_probe(struct platform_device *pdev)
701 {
702         if (usb_disabled())
703                 return -ENODEV;
704
705         /* FIXME we only want one one probe() not two */
706         return usb_hcd_fsl_probe(&ehci_fsl_hc_driver, pdev);
707 }
708
709 static int ehci_fsl_drv_remove(struct platform_device *pdev)
710 {
711         struct usb_hcd *hcd = platform_get_drvdata(pdev);
712
713         /* FIXME we only want one one remove() not two */
714         usb_hcd_fsl_remove(hcd, pdev);
715         return 0;
716 }
717
718 MODULE_ALIAS("platform:fsl-ehci");
719
720 static struct platform_driver ehci_fsl_driver = {
721         .probe = ehci_fsl_drv_probe,
722         .remove = ehci_fsl_drv_remove,
723         .shutdown = usb_hcd_platform_shutdown,
724         .driver = {
725                 .name = "fsl-ehci",
726                 .pm = EHCI_FSL_PM_OPS,
727         },
728 };