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Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[mirror_ubuntu-focal-kernel.git] / drivers / usb / host / ehci-fsl.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2005-2009 MontaVista Software, Inc.
4 * Copyright 2008,2012,2015 Freescale Semiconductor, Inc.
5 *
6 * Ported to 834x by Randy Vinson <rvinson@mvista.com> using code provided
7 * by Hunter Wu.
8 * Power Management support by Dave Liu <daveliu@freescale.com>,
9 * Jerry Huang <Chang-Ming.Huang@freescale.com> and
10 * Anton Vorontsov <avorontsov@ru.mvista.com>.
11 */
12
13 #include <linux/kernel.h>
14 #include <linux/module.h>
15 #include <linux/types.h>
16 #include <linux/delay.h>
17 #include <linux/pm.h>
18 #include <linux/err.h>
19 #include <linux/usb.h>
20 #include <linux/usb/ehci_def.h>
21 #include <linux/usb/hcd.h>
22 #include <linux/usb/otg.h>
23 #include <linux/platform_device.h>
24 #include <linux/fsl_devices.h>
25 #include <linux/of_platform.h>
26 #include <linux/io.h>
27
28 #include "ehci.h"
29 #include "ehci-fsl.h"
30
31 #define DRIVER_DESC "Freescale EHCI Host controller driver"
32 #define DRV_NAME "ehci-fsl"
33
34 static struct hc_driver __read_mostly fsl_ehci_hc_driver;
35
36 /* configure so an HC device and id are always provided */
37 /* always called with process context; sleeping is OK */
38
39 /*
40 * fsl_ehci_drv_probe - initialize FSL-based HCDs
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 fsl_ehci_drv_probe(struct platform_device *pdev)
48 {
49 struct fsl_usb2_platform_data *pdata;
50 struct usb_hcd *hcd;
51 struct resource *res;
52 int irq;
53 int retval;
54 u32 tmp;
55
56 pr_debug("initializing FSL-SOC USB Controller\n");
57
58 /* Need platform data for setup */
59 pdata = dev_get_platdata(&pdev->dev);
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(&fsl_ehci_hc_driver, pdev->dev.parent,
89 &pdev->dev, dev_name(&pdev->dev), NULL);
90 if (!hcd) {
91 retval = -ENOMEM;
92 goto err1;
93 }
94
95 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
96 hcd->regs = devm_ioremap_resource(&pdev->dev, res);
97 if (IS_ERR(hcd->regs)) {
98 retval = PTR_ERR(hcd->regs);
99 goto err2;
100 }
101
102 hcd->rsrc_start = res->start;
103 hcd->rsrc_len = resource_size(res);
104
105 pdata->regs = hcd->regs;
106
107 if (pdata->power_budget)
108 hcd->power_budget = pdata->power_budget;
109
110 /*
111 * do platform specific init: check the clock, grab/config pins, etc.
112 */
113 if (pdata->init && pdata->init(pdev)) {
114 retval = -ENODEV;
115 goto err2;
116 }
117
118 /* Enable USB controller, 83xx or 8536 */
119 if (pdata->have_sysif_regs && pdata->controller_ver < FSL_USB_VER_1_6) {
120 tmp = ioread32be(hcd->regs + FSL_SOC_USB_CTRL);
121 tmp &= ~CONTROL_REGISTER_W1C_MASK;
122 tmp |= 0x4;
123 iowrite32be(tmp, hcd->regs + FSL_SOC_USB_CTRL);
124 }
125
126 /* Set USB_EN bit to select ULPI phy for USB controller version 2.5 */
127 if (pdata->controller_ver == FSL_USB_VER_2_5 &&
128 pdata->phy_mode == FSL_USB2_PHY_ULPI)
129 iowrite32be(USB_CTRL_USB_EN, hcd->regs + FSL_SOC_USB_CTRL);
130
131 /*
132 * Enable UTMI phy and program PTS field in UTMI mode before asserting
133 * controller reset for USB Controller version 2.5
134 */
135 if (pdata->has_fsl_erratum_a007792) {
136 tmp = ioread32be(hcd->regs + FSL_SOC_USB_CTRL);
137 tmp &= ~CONTROL_REGISTER_W1C_MASK;
138 tmp |= CTRL_UTMI_PHY_EN;
139 iowrite32be(tmp, hcd->regs + FSL_SOC_USB_CTRL);
140
141 writel(PORT_PTS_UTMI, hcd->regs + FSL_SOC_USB_PORTSC1);
142 }
143
144 /* Don't need to set host mode here. It will be done by tdi_reset() */
145
146 retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
147 if (retval != 0)
148 goto err2;
149 device_wakeup_enable(hcd->self.controller);
150
151 #ifdef CONFIG_USB_OTG
152 if (pdata->operating_mode == FSL_USB2_DR_OTG) {
153 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
154
155 hcd->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
156 dev_dbg(&pdev->dev, "hcd=0x%p ehci=0x%p, phy=0x%p\n",
157 hcd, ehci, hcd->usb_phy);
158
159 if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
160 retval = otg_set_host(hcd->usb_phy->otg,
161 &ehci_to_hcd(ehci)->self);
162 if (retval) {
163 usb_put_phy(hcd->usb_phy);
164 goto err2;
165 }
166 } else {
167 dev_err(&pdev->dev, "can't find phy\n");
168 retval = -ENODEV;
169 goto err2;
170 }
171
172 hcd->skip_phy_initialization = 1;
173 }
174 #endif
175 return retval;
176
177 err2:
178 usb_put_hcd(hcd);
179 err1:
180 dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), retval);
181 if (pdata->exit)
182 pdata->exit(pdev);
183 return retval;
184 }
185
186 static bool usb_phy_clk_valid(struct usb_hcd *hcd)
187 {
188 void __iomem *non_ehci = hcd->regs;
189 bool ret = true;
190
191 if (!(ioread32be(non_ehci + FSL_SOC_USB_CTRL) & PHY_CLK_VALID))
192 ret = false;
193
194 return ret;
195 }
196
197 static int ehci_fsl_setup_phy(struct usb_hcd *hcd,
198 enum fsl_usb2_phy_modes phy_mode,
199 unsigned int port_offset)
200 {
201 u32 portsc, tmp;
202 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
203 void __iomem *non_ehci = hcd->regs;
204 struct device *dev = hcd->self.controller;
205 struct fsl_usb2_platform_data *pdata = dev_get_platdata(dev);
206
207 if (pdata->controller_ver < 0) {
208 dev_warn(hcd->self.controller, "Could not get controller version\n");
209 return -ENODEV;
210 }
211
212 portsc = ehci_readl(ehci, &ehci->regs->port_status[port_offset]);
213 portsc &= ~(PORT_PTS_MSK | PORT_PTS_PTW);
214
215 switch (phy_mode) {
216 case FSL_USB2_PHY_ULPI:
217 if (pdata->have_sysif_regs && pdata->controller_ver) {
218 /* controller version 1.6 or above */
219 /* turn off UTMI PHY first */
220 tmp = ioread32be(non_ehci + FSL_SOC_USB_CTRL);
221 tmp &= ~(CONTROL_REGISTER_W1C_MASK | UTMI_PHY_EN);
222 iowrite32be(tmp, non_ehci + FSL_SOC_USB_CTRL);
223
224 /* then turn on ULPI and enable USB controller */
225 tmp = ioread32be(non_ehci + FSL_SOC_USB_CTRL);
226 tmp &= ~CONTROL_REGISTER_W1C_MASK;
227 tmp |= ULPI_PHY_CLK_SEL | USB_CTRL_USB_EN;
228 iowrite32be(tmp, non_ehci + FSL_SOC_USB_CTRL);
229 }
230 portsc |= PORT_PTS_ULPI;
231 break;
232 case FSL_USB2_PHY_SERIAL:
233 portsc |= PORT_PTS_SERIAL;
234 break;
235 case FSL_USB2_PHY_UTMI_WIDE:
236 portsc |= PORT_PTS_PTW;
237 /* fall through */
238 case FSL_USB2_PHY_UTMI:
239 /* Presence of this node "has_fsl_erratum_a006918"
240 * in device-tree is used to stop USB controller
241 * initialization in Linux
242 */
243 if (pdata->has_fsl_erratum_a006918) {
244 dev_warn(dev, "USB PHY clock invalid\n");
245 return -EINVAL;
246 }
247 /* fall through */
248 case FSL_USB2_PHY_UTMI_DUAL:
249 /* PHY_CLK_VALID bit is de-featured from all controller
250 * versions below 2.4 and is to be checked only for
251 * internal UTMI phy
252 */
253 if (pdata->controller_ver > FSL_USB_VER_2_4 &&
254 pdata->have_sysif_regs && !usb_phy_clk_valid(hcd)) {
255 dev_err(dev, "USB PHY clock invalid\n");
256 return -EINVAL;
257 }
258
259 if (pdata->have_sysif_regs && pdata->controller_ver) {
260 /* controller version 1.6 or above */
261 tmp = ioread32be(non_ehci + FSL_SOC_USB_CTRL);
262 tmp &= ~CONTROL_REGISTER_W1C_MASK;
263 tmp |= UTMI_PHY_EN;
264 iowrite32be(tmp, non_ehci + FSL_SOC_USB_CTRL);
265
266 mdelay(FSL_UTMI_PHY_DLY); /* Delay for UTMI PHY CLK to
267 become stable - 10ms*/
268 }
269 /* enable UTMI PHY */
270 if (pdata->have_sysif_regs) {
271 tmp = ioread32be(non_ehci + FSL_SOC_USB_CTRL);
272 tmp &= ~CONTROL_REGISTER_W1C_MASK;
273 tmp |= CTRL_UTMI_PHY_EN;
274 iowrite32be(tmp, non_ehci + FSL_SOC_USB_CTRL);
275 }
276 portsc |= PORT_PTS_UTMI;
277 break;
278 case FSL_USB2_PHY_NONE:
279 break;
280 }
281
282 if (pdata->have_sysif_regs &&
283 pdata->controller_ver > FSL_USB_VER_1_6 &&
284 !usb_phy_clk_valid(hcd)) {
285 dev_warn(hcd->self.controller, "USB PHY clock invalid\n");
286 return -EINVAL;
287 }
288
289 ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]);
290
291 if (phy_mode != FSL_USB2_PHY_ULPI && pdata->have_sysif_regs) {
292 tmp = ioread32be(non_ehci + FSL_SOC_USB_CTRL);
293 tmp &= ~CONTROL_REGISTER_W1C_MASK;
294 tmp |= USB_CTRL_USB_EN;
295 iowrite32be(tmp, non_ehci + FSL_SOC_USB_CTRL);
296 }
297
298 return 0;
299 }
300
301 static int ehci_fsl_usb_setup(struct ehci_hcd *ehci)
302 {
303 struct usb_hcd *hcd = ehci_to_hcd(ehci);
304 struct fsl_usb2_platform_data *pdata;
305 void __iomem *non_ehci = hcd->regs;
306
307 pdata = dev_get_platdata(hcd->self.controller);
308
309 if (pdata->have_sysif_regs) {
310 /*
311 * Turn on cache snooping hardware, since some PowerPC platforms
312 * wholly rely on hardware to deal with cache coherent
313 */
314
315 /* Setup Snooping for all the 4GB space */
316 /* SNOOP1 starts from 0x0, size 2G */
317 iowrite32be(0x0 | SNOOP_SIZE_2GB,
318 non_ehci + FSL_SOC_USB_SNOOP1);
319 /* SNOOP2 starts from 0x80000000, size 2G */
320 iowrite32be(0x80000000 | SNOOP_SIZE_2GB,
321 non_ehci + FSL_SOC_USB_SNOOP2);
322 }
323
324 /* Deal with USB erratum A-005275 */
325 if (pdata->has_fsl_erratum_a005275 == 1)
326 ehci->has_fsl_hs_errata = 1;
327
328 if (pdata->has_fsl_erratum_a005697 == 1)
329 ehci->has_fsl_susp_errata = 1;
330
331 if ((pdata->operating_mode == FSL_USB2_DR_HOST) ||
332 (pdata->operating_mode == FSL_USB2_DR_OTG))
333 if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0))
334 return -EINVAL;
335
336 if (pdata->operating_mode == FSL_USB2_MPH_HOST) {
337
338 /* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */
339 if (pdata->has_fsl_erratum_14 == 1)
340 ehci->has_fsl_port_bug = 1;
341
342 if (pdata->port_enables & FSL_USB2_PORT0_ENABLED)
343 if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 0))
344 return -EINVAL;
345
346 if (pdata->port_enables & FSL_USB2_PORT1_ENABLED)
347 if (ehci_fsl_setup_phy(hcd, pdata->phy_mode, 1))
348 return -EINVAL;
349 }
350
351 if (pdata->have_sysif_regs) {
352 #ifdef CONFIG_FSL_SOC_BOOKE
353 iowrite32be(0x00000008, non_ehci + FSL_SOC_USB_PRICTRL);
354 iowrite32be(0x00000080, non_ehci + FSL_SOC_USB_AGECNTTHRSH);
355 #else
356 iowrite32be(0x0000000c, non_ehci + FSL_SOC_USB_PRICTRL);
357 iowrite32be(0x00000040, non_ehci + FSL_SOC_USB_AGECNTTHRSH);
358 #endif
359 iowrite32be(0x00000001, non_ehci + FSL_SOC_USB_SICTRL);
360 }
361
362 return 0;
363 }
364
365 /* called after powerup, by probe or system-pm "wakeup" */
366 static int ehci_fsl_reinit(struct ehci_hcd *ehci)
367 {
368 if (ehci_fsl_usb_setup(ehci))
369 return -EINVAL;
370
371 return 0;
372 }
373
374 /* called during probe() after chip reset completes */
375 static int ehci_fsl_setup(struct usb_hcd *hcd)
376 {
377 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
378 int retval;
379 struct fsl_usb2_platform_data *pdata;
380 struct device *dev;
381
382 dev = hcd->self.controller;
383 pdata = dev_get_platdata(hcd->self.controller);
384 ehci->big_endian_desc = pdata->big_endian_desc;
385 ehci->big_endian_mmio = pdata->big_endian_mmio;
386
387 /* EHCI registers start at offset 0x100 */
388 ehci->caps = hcd->regs + 0x100;
389
390 #ifdef CONFIG_PPC_83xx
391 /*
392 * Deal with MPC834X that need port power to be cycled after the power
393 * fault condition is removed. Otherwise the state machine does not
394 * reflect PORTSC[CSC] correctly.
395 */
396 ehci->need_oc_pp_cycle = 1;
397 #endif
398
399 hcd->has_tt = 1;
400
401 retval = ehci_setup(hcd);
402 if (retval)
403 return retval;
404
405 if (of_device_is_compatible(dev->parent->of_node,
406 "fsl,mpc5121-usb2-dr")) {
407 /*
408 * set SBUSCFG:AHBBRST so that control msgs don't
409 * fail when doing heavy PATA writes.
410 */
411 ehci_writel(ehci, SBUSCFG_INCR8,
412 hcd->regs + FSL_SOC_USB_SBUSCFG);
413 }
414
415 retval = ehci_fsl_reinit(ehci);
416 return retval;
417 }
418
419 struct ehci_fsl {
420 struct ehci_hcd ehci;
421
422 #ifdef CONFIG_PM
423 /* Saved USB PHY settings, need to restore after deep sleep. */
424 u32 usb_ctrl;
425 #endif
426 };
427
428 #ifdef CONFIG_PM
429
430 #ifdef CONFIG_PPC_MPC512x
431 static int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
432 {
433 struct usb_hcd *hcd = dev_get_drvdata(dev);
434 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
435 struct fsl_usb2_platform_data *pdata = dev_get_platdata(dev);
436 u32 tmp;
437
438 #ifdef CONFIG_DYNAMIC_DEBUG
439 u32 mode = ehci_readl(ehci, hcd->regs + FSL_SOC_USB_USBMODE);
440 mode &= USBMODE_CM_MASK;
441 tmp = ehci_readl(ehci, hcd->regs + 0x140); /* usbcmd */
442
443 dev_dbg(dev, "suspend=%d already_suspended=%d "
444 "mode=%d usbcmd %08x\n", pdata->suspended,
445 pdata->already_suspended, mode, tmp);
446 #endif
447
448 /*
449 * If the controller is already suspended, then this must be a
450 * PM suspend. Remember this fact, so that we will leave the
451 * controller suspended at PM resume time.
452 */
453 if (pdata->suspended) {
454 dev_dbg(dev, "already suspended, leaving early\n");
455 pdata->already_suspended = 1;
456 return 0;
457 }
458
459 dev_dbg(dev, "suspending...\n");
460
461 ehci->rh_state = EHCI_RH_SUSPENDED;
462 dev->power.power_state = PMSG_SUSPEND;
463
464 /* ignore non-host interrupts */
465 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
466
467 /* stop the controller */
468 tmp = ehci_readl(ehci, &ehci->regs->command);
469 tmp &= ~CMD_RUN;
470 ehci_writel(ehci, tmp, &ehci->regs->command);
471
472 /* save EHCI registers */
473 pdata->pm_command = ehci_readl(ehci, &ehci->regs->command);
474 pdata->pm_command &= ~CMD_RUN;
475 pdata->pm_status = ehci_readl(ehci, &ehci->regs->status);
476 pdata->pm_intr_enable = ehci_readl(ehci, &ehci->regs->intr_enable);
477 pdata->pm_frame_index = ehci_readl(ehci, &ehci->regs->frame_index);
478 pdata->pm_segment = ehci_readl(ehci, &ehci->regs->segment);
479 pdata->pm_frame_list = ehci_readl(ehci, &ehci->regs->frame_list);
480 pdata->pm_async_next = ehci_readl(ehci, &ehci->regs->async_next);
481 pdata->pm_configured_flag =
482 ehci_readl(ehci, &ehci->regs->configured_flag);
483 pdata->pm_portsc = ehci_readl(ehci, &ehci->regs->port_status[0]);
484 pdata->pm_usbgenctrl = ehci_readl(ehci,
485 hcd->regs + FSL_SOC_USB_USBGENCTRL);
486
487 /* clear the W1C bits */
488 pdata->pm_portsc &= cpu_to_hc32(ehci, ~PORT_RWC_BITS);
489
490 pdata->suspended = 1;
491
492 /* clear PP to cut power to the port */
493 tmp = ehci_readl(ehci, &ehci->regs->port_status[0]);
494 tmp &= ~PORT_POWER;
495 ehci_writel(ehci, tmp, &ehci->regs->port_status[0]);
496
497 return 0;
498 }
499
500 static int ehci_fsl_mpc512x_drv_resume(struct device *dev)
501 {
502 struct usb_hcd *hcd = dev_get_drvdata(dev);
503 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
504 struct fsl_usb2_platform_data *pdata = dev_get_platdata(dev);
505 u32 tmp;
506
507 dev_dbg(dev, "suspend=%d already_suspended=%d\n",
508 pdata->suspended, pdata->already_suspended);
509
510 /*
511 * If the controller was already suspended at suspend time,
512 * then don't resume it now.
513 */
514 if (pdata->already_suspended) {
515 dev_dbg(dev, "already suspended, leaving early\n");
516 pdata->already_suspended = 0;
517 return 0;
518 }
519
520 if (!pdata->suspended) {
521 dev_dbg(dev, "not suspended, leaving early\n");
522 return 0;
523 }
524
525 pdata->suspended = 0;
526
527 dev_dbg(dev, "resuming...\n");
528
529 /* set host mode */
530 tmp = USBMODE_CM_HOST | (pdata->es ? USBMODE_ES : 0);
531 ehci_writel(ehci, tmp, hcd->regs + FSL_SOC_USB_USBMODE);
532
533 ehci_writel(ehci, pdata->pm_usbgenctrl,
534 hcd->regs + FSL_SOC_USB_USBGENCTRL);
535 ehci_writel(ehci, ISIPHYCTRL_PXE | ISIPHYCTRL_PHYE,
536 hcd->regs + FSL_SOC_USB_ISIPHYCTRL);
537
538 ehci_writel(ehci, SBUSCFG_INCR8, hcd->regs + FSL_SOC_USB_SBUSCFG);
539
540 /* restore EHCI registers */
541 ehci_writel(ehci, pdata->pm_command, &ehci->regs->command);
542 ehci_writel(ehci, pdata->pm_intr_enable, &ehci->regs->intr_enable);
543 ehci_writel(ehci, pdata->pm_frame_index, &ehci->regs->frame_index);
544 ehci_writel(ehci, pdata->pm_segment, &ehci->regs->segment);
545 ehci_writel(ehci, pdata->pm_frame_list, &ehci->regs->frame_list);
546 ehci_writel(ehci, pdata->pm_async_next, &ehci->regs->async_next);
547 ehci_writel(ehci, pdata->pm_configured_flag,
548 &ehci->regs->configured_flag);
549 ehci_writel(ehci, pdata->pm_portsc, &ehci->regs->port_status[0]);
550
551 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
552 ehci->rh_state = EHCI_RH_RUNNING;
553 dev->power.power_state = PMSG_ON;
554
555 tmp = ehci_readl(ehci, &ehci->regs->command);
556 tmp |= CMD_RUN;
557 ehci_writel(ehci, tmp, &ehci->regs->command);
558
559 usb_hcd_resume_root_hub(hcd);
560
561 return 0;
562 }
563 #else
564 static inline int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
565 {
566 return 0;
567 }
568
569 static inline int ehci_fsl_mpc512x_drv_resume(struct device *dev)
570 {
571 return 0;
572 }
573 #endif /* CONFIG_PPC_MPC512x */
574
575 static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd)
576 {
577 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
578
579 return container_of(ehci, struct ehci_fsl, ehci);
580 }
581
582 static int ehci_fsl_drv_suspend(struct device *dev)
583 {
584 struct usb_hcd *hcd = dev_get_drvdata(dev);
585 struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
586 void __iomem *non_ehci = hcd->regs;
587
588 if (of_device_is_compatible(dev->parent->of_node,
589 "fsl,mpc5121-usb2-dr")) {
590 return ehci_fsl_mpc512x_drv_suspend(dev);
591 }
592
593 ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd),
594 device_may_wakeup(dev));
595 if (!fsl_deep_sleep())
596 return 0;
597
598 ehci_fsl->usb_ctrl = ioread32be(non_ehci + FSL_SOC_USB_CTRL);
599 return 0;
600 }
601
602 static int ehci_fsl_drv_resume(struct device *dev)
603 {
604 struct usb_hcd *hcd = dev_get_drvdata(dev);
605 struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
606 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
607 void __iomem *non_ehci = hcd->regs;
608
609 if (of_device_is_compatible(dev->parent->of_node,
610 "fsl,mpc5121-usb2-dr")) {
611 return ehci_fsl_mpc512x_drv_resume(dev);
612 }
613
614 ehci_prepare_ports_for_controller_resume(ehci);
615 if (!fsl_deep_sleep())
616 return 0;
617
618 usb_root_hub_lost_power(hcd->self.root_hub);
619
620 /* Restore USB PHY settings and enable the controller. */
621 iowrite32be(ehci_fsl->usb_ctrl, non_ehci + FSL_SOC_USB_CTRL);
622
623 ehci_reset(ehci);
624 ehci_fsl_reinit(ehci);
625
626 return 0;
627 }
628
629 static int ehci_fsl_drv_restore(struct device *dev)
630 {
631 struct usb_hcd *hcd = dev_get_drvdata(dev);
632
633 usb_root_hub_lost_power(hcd->self.root_hub);
634 return 0;
635 }
636
637 static const struct dev_pm_ops ehci_fsl_pm_ops = {
638 .suspend = ehci_fsl_drv_suspend,
639 .resume = ehci_fsl_drv_resume,
640 .restore = ehci_fsl_drv_restore,
641 };
642
643 #define EHCI_FSL_PM_OPS (&ehci_fsl_pm_ops)
644 #else
645 #define EHCI_FSL_PM_OPS NULL
646 #endif /* CONFIG_PM */
647
648 #ifdef CONFIG_USB_OTG
649 static int ehci_start_port_reset(struct usb_hcd *hcd, unsigned port)
650 {
651 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
652 u32 status;
653
654 if (!port)
655 return -EINVAL;
656
657 port--;
658
659 /* start port reset before HNP protocol time out */
660 status = readl(&ehci->regs->port_status[port]);
661 if (!(status & PORT_CONNECT))
662 return -ENODEV;
663
664 /* hub_wq will finish the reset later */
665 if (ehci_is_TDI(ehci)) {
666 writel(PORT_RESET |
667 (status & ~(PORT_CSC | PORT_PEC | PORT_OCC)),
668 &ehci->regs->port_status[port]);
669 } else {
670 writel(PORT_RESET, &ehci->regs->port_status[port]);
671 }
672
673 return 0;
674 }
675 #else
676 #define ehci_start_port_reset NULL
677 #endif /* CONFIG_USB_OTG */
678
679 static const struct ehci_driver_overrides ehci_fsl_overrides __initconst = {
680 .extra_priv_size = sizeof(struct ehci_fsl),
681 .reset = ehci_fsl_setup,
682 };
683
684 /**
685 * fsl_ehci_drv_remove - shutdown processing for FSL-based HCDs
686 * @dev: USB Host Controller being removed
687 * Context: !in_interrupt()
688 *
689 * Reverses the effect of usb_hcd_fsl_probe().
690 *
691 */
692
693 static int fsl_ehci_drv_remove(struct platform_device *pdev)
694 {
695 struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
696 struct usb_hcd *hcd = platform_get_drvdata(pdev);
697
698 if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
699 otg_set_host(hcd->usb_phy->otg, NULL);
700 usb_put_phy(hcd->usb_phy);
701 }
702
703 usb_remove_hcd(hcd);
704
705 /*
706 * do platform specific un-initialization:
707 * release iomux pins, disable clock, etc.
708 */
709 if (pdata->exit)
710 pdata->exit(pdev);
711 usb_put_hcd(hcd);
712
713 return 0;
714 }
715
716 static struct platform_driver ehci_fsl_driver = {
717 .probe = fsl_ehci_drv_probe,
718 .remove = fsl_ehci_drv_remove,
719 .shutdown = usb_hcd_platform_shutdown,
720 .driver = {
721 .name = "fsl-ehci",
722 .pm = EHCI_FSL_PM_OPS,
723 },
724 };
725
726 static int __init ehci_fsl_init(void)
727 {
728 if (usb_disabled())
729 return -ENODEV;
730
731 pr_info(DRV_NAME ": " DRIVER_DESC "\n");
732
733 ehci_init_driver(&fsl_ehci_hc_driver, &ehci_fsl_overrides);
734
735 fsl_ehci_hc_driver.product_desc =
736 "Freescale On-Chip EHCI Host Controller";
737 fsl_ehci_hc_driver.start_port_reset = ehci_start_port_reset;
738
739
740 return platform_driver_register(&ehci_fsl_driver);
741 }
742 module_init(ehci_fsl_init);
743
744 static void __exit ehci_fsl_cleanup(void)
745 {
746 platform_driver_unregister(&ehci_fsl_driver);
747 }
748 module_exit(ehci_fsl_cleanup);
749
750 MODULE_DESCRIPTION(DRIVER_DESC);
751 MODULE_LICENSE("GPL");
752 MODULE_ALIAS("platform:" DRV_NAME);
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