1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * phy-brcm-usb.c - Broadcom USB Phy Driver
4  *
5  * Copyright (C) 2015-2017 Broadcom
6  */
7 
8 #include <linux/clk.h>
9 #include <linux/delay.h>
10 #include <linux/err.h>
11 #include <linux/io.h>
12 #include <linux/module.h>
13 #include <linux/of.h>
14 #include <linux/phy/phy.h>
15 #include <linux/platform_device.h>
16 #include <linux/interrupt.h>
17 #include <linux/soc/brcmstb/brcmstb.h>
18 #include <dt-bindings/phy/phy.h>
19 #include <linux/mfd/syscon.h>
20 #include <linux/suspend.h>
21 
22 #include "phy-brcm-usb-init.h"
23 
24 static DEFINE_MUTEX(sysfs_lock);
25 
26 enum brcm_usb_phy_id {
27 	BRCM_USB_PHY_2_0 = 0,
28 	BRCM_USB_PHY_3_0,
29 	BRCM_USB_PHY_ID_MAX
30 };
31 
32 struct value_to_name_map {
33 	int value;
34 	const char *name;
35 };
36 
37 struct match_chip_info {
38 	void (*init_func)(struct brcm_usb_init_params *params);
39 	u8 required_regs[BRCM_REGS_MAX + 1];
40 	u8 optional_reg;
41 };
42 
43 static const struct value_to_name_map brcm_dr_mode_to_name[] = {
44 	{ USB_CTLR_MODE_HOST, "host" },
45 	{ USB_CTLR_MODE_DEVICE, "peripheral" },
46 	{ USB_CTLR_MODE_DRD, "drd" },
47 	{ USB_CTLR_MODE_TYPEC_PD, "typec-pd" }
48 };
49 
50 static const struct value_to_name_map brcm_dual_mode_to_name[] = {
51 	{ 0, "host" },
52 	{ 1, "device" },
53 	{ 2, "auto" },
54 };
55 
56 struct brcm_usb_phy {
57 	struct phy *phy;
58 	unsigned int id;
59 	bool inited;
60 };
61 
62 struct brcm_usb_phy_data {
63 	struct  brcm_usb_init_params ini;
64 	bool			has_eohci;
65 	bool			has_xhci;
66 	struct clk		*usb_20_clk;
67 	struct clk		*usb_30_clk;
68 	struct clk		*suspend_clk;
69 	struct mutex		mutex;	/* serialize phy init */
70 	int			init_count;
71 	int			wake_irq;
72 	struct brcm_usb_phy	phys[BRCM_USB_PHY_ID_MAX];
73 	struct notifier_block	pm_notifier;
74 	bool			pm_active;
75 };
76 
77 static s8 *node_reg_names[BRCM_REGS_MAX] = {
78 	"crtl", "xhci_ec", "xhci_gbl", "usb_phy", "usb_mdio", "bdc_ec"
79 };
80 
brcm_pm_notifier(struct notifier_block * notifier,unsigned long pm_event,void * unused)81 static int brcm_pm_notifier(struct notifier_block *notifier,
82 			    unsigned long pm_event,
83 			    void *unused)
84 {
85 	struct brcm_usb_phy_data *priv =
86 		container_of(notifier, struct brcm_usb_phy_data, pm_notifier);
87 
88 	switch (pm_event) {
89 	case PM_HIBERNATION_PREPARE:
90 	case PM_SUSPEND_PREPARE:
91 		priv->pm_active = true;
92 		break;
93 	case PM_POST_RESTORE:
94 	case PM_POST_HIBERNATION:
95 	case PM_POST_SUSPEND:
96 		priv->pm_active = false;
97 		break;
98 	}
99 	return NOTIFY_DONE;
100 }
101 
brcm_usb_phy_wake_isr(int irq,void * dev_id)102 static irqreturn_t brcm_usb_phy_wake_isr(int irq, void *dev_id)
103 {
104 	struct device *dev = dev_id;
105 
106 	pm_wakeup_event(dev, 0);
107 
108 	return IRQ_HANDLED;
109 }
110 
brcm_usb_phy_init(struct phy * gphy)111 static int brcm_usb_phy_init(struct phy *gphy)
112 {
113 	struct brcm_usb_phy *phy = phy_get_drvdata(gphy);
114 	struct brcm_usb_phy_data *priv =
115 		container_of(phy, struct brcm_usb_phy_data, phys[phy->id]);
116 
117 	if (priv->pm_active)
118 		return 0;
119 
120 	/*
121 	 * Use a lock to make sure a second caller waits until
122 	 * the base phy is inited before using it.
123 	 */
124 	mutex_lock(&priv->mutex);
125 	if (priv->init_count++ == 0) {
126 		clk_prepare_enable(priv->usb_20_clk);
127 		clk_prepare_enable(priv->usb_30_clk);
128 		clk_prepare_enable(priv->suspend_clk);
129 		brcm_usb_init_common(&priv->ini);
130 	}
131 	mutex_unlock(&priv->mutex);
132 	if (phy->id == BRCM_USB_PHY_2_0)
133 		brcm_usb_init_eohci(&priv->ini);
134 	else if (phy->id == BRCM_USB_PHY_3_0)
135 		brcm_usb_init_xhci(&priv->ini);
136 	phy->inited = true;
137 	dev_dbg(&gphy->dev, "INIT, id: %d, total: %d\n", phy->id,
138 		priv->init_count);
139 
140 	return 0;
141 }
142 
brcm_usb_phy_exit(struct phy * gphy)143 static int brcm_usb_phy_exit(struct phy *gphy)
144 {
145 	struct brcm_usb_phy *phy = phy_get_drvdata(gphy);
146 	struct brcm_usb_phy_data *priv =
147 		container_of(phy, struct brcm_usb_phy_data, phys[phy->id]);
148 
149 	if (priv->pm_active)
150 		return 0;
151 
152 	dev_dbg(&gphy->dev, "EXIT\n");
153 	if (phy->id == BRCM_USB_PHY_2_0)
154 		brcm_usb_uninit_eohci(&priv->ini);
155 	if (phy->id == BRCM_USB_PHY_3_0)
156 		brcm_usb_uninit_xhci(&priv->ini);
157 
158 	/* If both xhci and eohci are gone, reset everything else */
159 	mutex_lock(&priv->mutex);
160 	if (--priv->init_count == 0) {
161 		brcm_usb_uninit_common(&priv->ini);
162 		clk_disable_unprepare(priv->usb_20_clk);
163 		clk_disable_unprepare(priv->usb_30_clk);
164 		clk_disable_unprepare(priv->suspend_clk);
165 	}
166 	mutex_unlock(&priv->mutex);
167 	phy->inited = false;
168 	return 0;
169 }
170 
171 static const struct phy_ops brcm_usb_phy_ops = {
172 	.init		= brcm_usb_phy_init,
173 	.exit		= brcm_usb_phy_exit,
174 	.owner		= THIS_MODULE,
175 };
176 
brcm_usb_phy_xlate(struct device * dev,struct of_phandle_args * args)177 static struct phy *brcm_usb_phy_xlate(struct device *dev,
178 				      struct of_phandle_args *args)
179 {
180 	struct brcm_usb_phy_data *data = dev_get_drvdata(dev);
181 
182 	/*
183 	 * values 0 and 1 are for backward compatibility with
184 	 * device tree nodes from older bootloaders.
185 	 */
186 	switch (args->args[0]) {
187 	case 0:
188 	case PHY_TYPE_USB2:
189 		if (data->phys[BRCM_USB_PHY_2_0].phy)
190 			return data->phys[BRCM_USB_PHY_2_0].phy;
191 		dev_warn(dev, "Error, 2.0 Phy not found\n");
192 		break;
193 	case 1:
194 	case PHY_TYPE_USB3:
195 		if (data->phys[BRCM_USB_PHY_3_0].phy)
196 			return data->phys[BRCM_USB_PHY_3_0].phy;
197 		dev_warn(dev, "Error, 3.0 Phy not found\n");
198 		break;
199 	}
200 	return ERR_PTR(-ENODEV);
201 }
202 
name_to_value(const struct value_to_name_map * table,int count,const char * name,int * value)203 static int name_to_value(const struct value_to_name_map *table, int count,
204 			 const char *name, int *value)
205 {
206 	int x;
207 
208 	*value = 0;
209 	for (x = 0; x < count; x++) {
210 		if (sysfs_streq(name, table[x].name)) {
211 			*value = x;
212 			return 0;
213 		}
214 	}
215 	return -EINVAL;
216 }
217 
value_to_name(const struct value_to_name_map * table,int count,int value)218 static const char *value_to_name(const struct value_to_name_map *table, int count,
219 				 int value)
220 {
221 	if (value >= count)
222 		return "unknown";
223 	return table[value].name;
224 }
225 
dr_mode_show(struct device * dev,struct device_attribute * attr,char * buf)226 static ssize_t dr_mode_show(struct device *dev,
227 			    struct device_attribute *attr,
228 			    char *buf)
229 {
230 	struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);
231 
232 	return sprintf(buf, "%s\n",
233 		value_to_name(&brcm_dr_mode_to_name[0],
234 			      ARRAY_SIZE(brcm_dr_mode_to_name),
235 			      priv->ini.supported_port_modes));
236 }
237 static DEVICE_ATTR_RO(dr_mode);
238 
dual_select_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t len)239 static ssize_t dual_select_store(struct device *dev,
240 				 struct device_attribute *attr,
241 				 const char *buf, size_t len)
242 {
243 	struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);
244 	int value;
245 	int res;
246 
247 	mutex_lock(&sysfs_lock);
248 	res = name_to_value(&brcm_dual_mode_to_name[0],
249 			    ARRAY_SIZE(brcm_dual_mode_to_name), buf, &value);
250 	if (!res) {
251 		priv->ini.port_mode = value;
252 		brcm_usb_set_dual_select(&priv->ini);
253 		res = len;
254 	}
255 	mutex_unlock(&sysfs_lock);
256 	return res;
257 }
258 
dual_select_show(struct device * dev,struct device_attribute * attr,char * buf)259 static ssize_t dual_select_show(struct device *dev,
260 				struct device_attribute *attr,
261 				char *buf)
262 {
263 	struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);
264 	int value;
265 
266 	mutex_lock(&sysfs_lock);
267 	value = brcm_usb_get_dual_select(&priv->ini);
268 	mutex_unlock(&sysfs_lock);
269 	return sprintf(buf, "%s\n",
270 		value_to_name(&brcm_dual_mode_to_name[0],
271 			      ARRAY_SIZE(brcm_dual_mode_to_name),
272 			      value));
273 }
274 static DEVICE_ATTR_RW(dual_select);
275 
276 static struct attribute *brcm_usb_phy_attrs[] = {
277 	&dev_attr_dr_mode.attr,
278 	&dev_attr_dual_select.attr,
279 	NULL
280 };
281 
282 static const struct attribute_group brcm_usb_phy_group = {
283 	.attrs = brcm_usb_phy_attrs,
284 };
285 
286 static const struct match_chip_info chip_info_4908 = {
287 	.init_func = &brcm_usb_dvr_init_4908,
288 	.required_regs = {
289 		BRCM_REGS_CTRL,
290 		BRCM_REGS_XHCI_EC,
291 		-1,
292 	},
293 };
294 
295 static const struct match_chip_info chip_info_7216 = {
296 	.init_func = &brcm_usb_dvr_init_7216,
297 	.required_regs = {
298 		BRCM_REGS_CTRL,
299 		BRCM_REGS_XHCI_EC,
300 		BRCM_REGS_XHCI_GBL,
301 		-1,
302 	},
303 };
304 
305 static const struct match_chip_info chip_info_7211b0 = {
306 	.init_func = &brcm_usb_dvr_init_7211b0,
307 	.required_regs = {
308 		BRCM_REGS_CTRL,
309 		BRCM_REGS_XHCI_EC,
310 		BRCM_REGS_XHCI_GBL,
311 		BRCM_REGS_USB_PHY,
312 		BRCM_REGS_USB_MDIO,
313 		-1,
314 	},
315 	.optional_reg = BRCM_REGS_BDC_EC,
316 };
317 
318 static const struct match_chip_info chip_info_7445 = {
319 	.init_func = &brcm_usb_dvr_init_7445,
320 	.required_regs = {
321 		BRCM_REGS_CTRL,
322 		BRCM_REGS_XHCI_EC,
323 		-1,
324 	},
325 };
326 
327 static const struct of_device_id brcm_usb_dt_ids[] = {
328 	{
329 		.compatible = "brcm,bcm4908-usb-phy",
330 		.data = &chip_info_4908,
331 	},
332 	{
333 		.compatible = "brcm,bcm7216-usb-phy",
334 		.data = &chip_info_7216,
335 	},
336 	{
337 		.compatible = "brcm,bcm7211-usb-phy",
338 		.data = &chip_info_7211b0,
339 	},
340 	{
341 		.compatible = "brcm,brcmstb-usb-phy",
342 		.data = &chip_info_7445,
343 	},
344 	{ /* sentinel */ }
345 };
346 
brcm_usb_get_regs(struct platform_device * pdev,enum brcmusb_reg_sel regs,struct brcm_usb_init_params * ini,bool optional)347 static int brcm_usb_get_regs(struct platform_device *pdev,
348 			     enum brcmusb_reg_sel regs,
349 			     struct  brcm_usb_init_params *ini,
350 			     bool optional)
351 {
352 	struct resource *res;
353 
354 	/* Older DT nodes have ctrl and optional xhci_ec by index only */
355 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
356 						node_reg_names[regs]);
357 	if (res == NULL) {
358 		if (regs == BRCM_REGS_CTRL) {
359 			res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
360 		} else if (regs == BRCM_REGS_XHCI_EC) {
361 			res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
362 			/* XHCI_EC registers are optional */
363 			if (res == NULL)
364 				return 0;
365 		}
366 		if (res == NULL) {
367 			if (optional) {
368 				dev_dbg(&pdev->dev,
369 					"Optional reg %s not found\n",
370 					node_reg_names[regs]);
371 				return 0;
372 			}
373 			dev_err(&pdev->dev, "can't get %s base addr\n",
374 				node_reg_names[regs]);
375 			return 1;
376 		}
377 	}
378 	ini->regs[regs] = devm_ioremap_resource(&pdev->dev, res);
379 	if (IS_ERR(ini->regs[regs])) {
380 		dev_err(&pdev->dev, "can't map %s register space\n",
381 			node_reg_names[regs]);
382 		return 1;
383 	}
384 	return 0;
385 }
386 
brcm_usb_phy_dvr_init(struct platform_device * pdev,struct brcm_usb_phy_data * priv,struct device_node * dn)387 static int brcm_usb_phy_dvr_init(struct platform_device *pdev,
388 				 struct brcm_usb_phy_data *priv,
389 				 struct device_node *dn)
390 {
391 	struct device *dev = &pdev->dev;
392 	struct phy *gphy = NULL;
393 	int err;
394 
395 	priv->usb_20_clk = of_clk_get_by_name(dn, "sw_usb");
396 	if (IS_ERR(priv->usb_20_clk)) {
397 		if (PTR_ERR(priv->usb_20_clk) == -EPROBE_DEFER)
398 			return -EPROBE_DEFER;
399 		dev_info(dev, "Clock not found in Device Tree\n");
400 		priv->usb_20_clk = NULL;
401 	}
402 	err = clk_prepare_enable(priv->usb_20_clk);
403 	if (err)
404 		return err;
405 
406 	if (priv->has_eohci) {
407 		gphy = devm_phy_create(dev, NULL, &brcm_usb_phy_ops);
408 		if (IS_ERR(gphy)) {
409 			dev_err(dev, "failed to create EHCI/OHCI PHY\n");
410 			return PTR_ERR(gphy);
411 		}
412 		priv->phys[BRCM_USB_PHY_2_0].phy = gphy;
413 		priv->phys[BRCM_USB_PHY_2_0].id = BRCM_USB_PHY_2_0;
414 		phy_set_drvdata(gphy, &priv->phys[BRCM_USB_PHY_2_0]);
415 	}
416 
417 	if (priv->has_xhci) {
418 		gphy = devm_phy_create(dev, NULL, &brcm_usb_phy_ops);
419 		if (IS_ERR(gphy)) {
420 			dev_err(dev, "failed to create XHCI PHY\n");
421 			return PTR_ERR(gphy);
422 		}
423 		priv->phys[BRCM_USB_PHY_3_0].phy = gphy;
424 		priv->phys[BRCM_USB_PHY_3_0].id = BRCM_USB_PHY_3_0;
425 		phy_set_drvdata(gphy, &priv->phys[BRCM_USB_PHY_3_0]);
426 
427 		priv->usb_30_clk = of_clk_get_by_name(dn, "sw_usb3");
428 		if (IS_ERR(priv->usb_30_clk)) {
429 			if (PTR_ERR(priv->usb_30_clk) == -EPROBE_DEFER)
430 				return -EPROBE_DEFER;
431 			dev_info(dev,
432 				 "USB3.0 clock not found in Device Tree\n");
433 			priv->usb_30_clk = NULL;
434 		}
435 		err = clk_prepare_enable(priv->usb_30_clk);
436 		if (err)
437 			return err;
438 	}
439 
440 	priv->suspend_clk = clk_get(dev, "usb0_freerun");
441 	if (IS_ERR(priv->suspend_clk)) {
442 		if (PTR_ERR(priv->suspend_clk) == -EPROBE_DEFER)
443 			return -EPROBE_DEFER;
444 		dev_err(dev, "Suspend Clock not found in Device Tree\n");
445 		priv->suspend_clk = NULL;
446 	}
447 
448 	priv->wake_irq = platform_get_irq_byname_optional(pdev, "wake");
449 	if (priv->wake_irq < 0)
450 		priv->wake_irq = platform_get_irq_byname_optional(pdev, "wakeup");
451 	if (priv->wake_irq >= 0) {
452 		err = devm_request_irq(dev, priv->wake_irq,
453 				       brcm_usb_phy_wake_isr, 0,
454 				       dev_name(dev), dev);
455 		if (err < 0)
456 			return err;
457 		device_set_wakeup_capable(dev, 1);
458 	} else {
459 		dev_info(dev,
460 			 "Wake interrupt missing, system wake not supported\n");
461 	}
462 
463 	return 0;
464 }
465 
brcm_usb_phy_probe(struct platform_device * pdev)466 static int brcm_usb_phy_probe(struct platform_device *pdev)
467 {
468 	struct device *dev = &pdev->dev;
469 	struct brcm_usb_phy_data *priv;
470 	struct phy_provider *phy_provider;
471 	struct device_node *dn = pdev->dev.of_node;
472 	int err;
473 	const char *mode;
474 	const struct match_chip_info *info;
475 	struct regmap *rmap;
476 	int x;
477 
478 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
479 	if (!priv)
480 		return -ENOMEM;
481 	platform_set_drvdata(pdev, priv);
482 
483 	priv->ini.family_id = brcmstb_get_family_id();
484 	priv->ini.product_id = brcmstb_get_product_id();
485 
486 	info = of_device_get_match_data(&pdev->dev);
487 	if (!info)
488 		return -ENOENT;
489 
490 	info->init_func(&priv->ini);
491 
492 	dev_dbg(dev, "Best mapping table is for %s\n",
493 		priv->ini.family_name);
494 
495 	of_property_read_u32(dn, "brcm,ipp", &priv->ini.ipp);
496 	of_property_read_u32(dn, "brcm,ioc", &priv->ini.ioc);
497 
498 	priv->ini.supported_port_modes = USB_CTLR_MODE_HOST;
499 	err = of_property_read_string(dn, "dr_mode", &mode);
500 	if (err == 0) {
501 		name_to_value(&brcm_dr_mode_to_name[0],
502 			      ARRAY_SIZE(brcm_dr_mode_to_name),
503 			mode, &priv->ini.supported_port_modes);
504 	}
505 	/* Default port_mode to supported port_modes */
506 	priv->ini.port_mode = priv->ini.supported_port_modes;
507 
508 	if (of_property_read_bool(dn, "brcm,has-xhci"))
509 		priv->has_xhci = true;
510 	if (of_property_read_bool(dn, "brcm,has-eohci"))
511 		priv->has_eohci = true;
512 
513 	for (x = 0; x < BRCM_REGS_MAX; x++) {
514 		if (info->required_regs[x] >= BRCM_REGS_MAX)
515 			break;
516 
517 		err = brcm_usb_get_regs(pdev, info->required_regs[x],
518 					&priv->ini, false);
519 		if (err)
520 			return -EINVAL;
521 	}
522 	if (info->optional_reg) {
523 		err = brcm_usb_get_regs(pdev, info->optional_reg,
524 					&priv->ini, true);
525 		if (err)
526 			return -EINVAL;
527 	}
528 
529 	err = brcm_usb_phy_dvr_init(pdev, priv, dn);
530 	if (err)
531 		return err;
532 
533 	priv->pm_notifier.notifier_call = brcm_pm_notifier;
534 	register_pm_notifier(&priv->pm_notifier);
535 
536 	mutex_init(&priv->mutex);
537 
538 	/* make sure invert settings are correct */
539 	brcm_usb_init_ipp(&priv->ini);
540 
541 	/*
542 	 * Create sysfs entries for mode.
543 	 * Remove "dual_select" attribute if not in dual mode
544 	 */
545 	if (priv->ini.supported_port_modes != USB_CTLR_MODE_DRD)
546 		brcm_usb_phy_attrs[1] = NULL;
547 	err = sysfs_create_group(&dev->kobj, &brcm_usb_phy_group);
548 	if (err)
549 		dev_warn(dev, "Error creating sysfs attributes\n");
550 
551 	/* Get piarbctl syscon if it exists */
552 	rmap = syscon_regmap_lookup_by_phandle(dev->of_node,
553 						 "syscon-piarbctl");
554 	if (IS_ERR(rmap))
555 		rmap = syscon_regmap_lookup_by_phandle(dev->of_node,
556 						       "brcm,syscon-piarbctl");
557 	if (!IS_ERR(rmap))
558 		priv->ini.syscon_piarbctl = rmap;
559 
560 	/* start with everything off */
561 	if (priv->has_xhci)
562 		brcm_usb_uninit_xhci(&priv->ini);
563 	if (priv->has_eohci)
564 		brcm_usb_uninit_eohci(&priv->ini);
565 	brcm_usb_uninit_common(&priv->ini);
566 	clk_disable_unprepare(priv->usb_20_clk);
567 	clk_disable_unprepare(priv->usb_30_clk);
568 
569 	phy_provider = devm_of_phy_provider_register(dev, brcm_usb_phy_xlate);
570 
571 	return PTR_ERR_OR_ZERO(phy_provider);
572 }
573 
brcm_usb_phy_remove(struct platform_device * pdev)574 static void brcm_usb_phy_remove(struct platform_device *pdev)
575 {
576 	struct brcm_usb_phy_data *priv = dev_get_drvdata(&pdev->dev);
577 
578 	sysfs_remove_group(&pdev->dev.kobj, &brcm_usb_phy_group);
579 	unregister_pm_notifier(&priv->pm_notifier);
580 }
581 
582 #ifdef CONFIG_PM_SLEEP
brcm_usb_phy_suspend(struct device * dev)583 static int brcm_usb_phy_suspend(struct device *dev)
584 {
585 	struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);
586 
587 	if (priv->init_count) {
588 		dev_dbg(dev, "SUSPEND\n");
589 		priv->ini.wake_enabled = device_may_wakeup(dev);
590 		if (priv->phys[BRCM_USB_PHY_3_0].inited)
591 			brcm_usb_uninit_xhci(&priv->ini);
592 		if (priv->phys[BRCM_USB_PHY_2_0].inited)
593 			brcm_usb_uninit_eohci(&priv->ini);
594 		brcm_usb_uninit_common(&priv->ini);
595 
596 		/*
597 		 * Handle the clocks unless needed for wake. This has
598 		 * to work for both older XHCI->3.0-clks, EOHCI->2.0-clks
599 		 * and newer XHCI->2.0-clks/3.0-clks.
600 		 */
601 
602 		if (!priv->ini.wake_enabled) {
603 			if (priv->phys[BRCM_USB_PHY_3_0].inited)
604 				clk_disable_unprepare(priv->usb_30_clk);
605 			if (priv->phys[BRCM_USB_PHY_2_0].inited ||
606 			    !priv->has_eohci)
607 				clk_disable_unprepare(priv->usb_20_clk);
608 		}
609 		if (priv->wake_irq >= 0)
610 			enable_irq_wake(priv->wake_irq);
611 	}
612 	return 0;
613 }
614 
brcm_usb_phy_resume(struct device * dev)615 static int brcm_usb_phy_resume(struct device *dev)
616 {
617 	struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);
618 
619 	if (!priv->ini.wake_enabled) {
620 		clk_prepare_enable(priv->usb_20_clk);
621 		clk_prepare_enable(priv->usb_30_clk);
622 	}
623 	brcm_usb_init_ipp(&priv->ini);
624 
625 	/*
626 	 * Initialize anything that was previously initialized.
627 	 * Uninitialize anything that wasn't previously initialized.
628 	 */
629 	if (priv->init_count) {
630 		dev_dbg(dev, "RESUME\n");
631 		if (priv->wake_irq >= 0)
632 			disable_irq_wake(priv->wake_irq);
633 		brcm_usb_init_common(&priv->ini);
634 		if (priv->phys[BRCM_USB_PHY_2_0].inited) {
635 			brcm_usb_init_eohci(&priv->ini);
636 		} else if (priv->has_eohci) {
637 			brcm_usb_uninit_eohci(&priv->ini);
638 			clk_disable_unprepare(priv->usb_20_clk);
639 		}
640 		if (priv->phys[BRCM_USB_PHY_3_0].inited) {
641 			brcm_usb_init_xhci(&priv->ini);
642 		} else if (priv->has_xhci) {
643 			brcm_usb_uninit_xhci(&priv->ini);
644 			clk_disable_unprepare(priv->usb_30_clk);
645 			if (!priv->has_eohci)
646 				clk_disable_unprepare(priv->usb_20_clk);
647 		}
648 	} else {
649 		if (priv->has_xhci)
650 			brcm_usb_uninit_xhci(&priv->ini);
651 		if (priv->has_eohci)
652 			brcm_usb_uninit_eohci(&priv->ini);
653 		brcm_usb_uninit_common(&priv->ini);
654 		clk_disable_unprepare(priv->usb_20_clk);
655 		clk_disable_unprepare(priv->usb_30_clk);
656 	}
657 	priv->ini.wake_enabled = false;
658 	return 0;
659 }
660 #endif /* CONFIG_PM_SLEEP */
661 
662 static const struct dev_pm_ops brcm_usb_phy_pm_ops = {
663 	SET_LATE_SYSTEM_SLEEP_PM_OPS(brcm_usb_phy_suspend, brcm_usb_phy_resume)
664 };
665 
666 MODULE_DEVICE_TABLE(of, brcm_usb_dt_ids);
667 
668 static struct platform_driver brcm_usb_driver = {
669 	.probe		= brcm_usb_phy_probe,
670 	.remove_new	= brcm_usb_phy_remove,
671 	.driver		= {
672 		.name	= "brcmstb-usb-phy",
673 		.pm = &brcm_usb_phy_pm_ops,
674 		.of_match_table = brcm_usb_dt_ids,
675 	},
676 };
677 
678 module_platform_driver(brcm_usb_driver);
679 
680 MODULE_ALIAS("platform:brcmstb-usb-phy");
681 MODULE_AUTHOR("Al Cooper <acooper@broadcom.com>");
682 MODULE_DESCRIPTION("BRCM USB PHY driver");
683 MODULE_LICENSE("GPL v2");
684