xref: /openbmc/linux/drivers/usb/dwc3/dwc3-omap.c (revision df2daed5)
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * dwc3-omap.c - OMAP Specific Glue layer
4  *
5  * Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com
6  *
7  * Authors: Felipe Balbi <balbi@ti.com>,
8  *	    Sebastian Andrzej Siewior <bigeasy@linutronix.de>
9  */
10 
11 #include <linux/module.h>
12 #include <linux/kernel.h>
13 #include <linux/slab.h>
14 #include <linux/irq.h>
15 #include <linux/interrupt.h>
16 #include <linux/platform_device.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/dma-mapping.h>
19 #include <linux/ioport.h>
20 #include <linux/io.h>
21 #include <linux/of.h>
22 #include <linux/of_platform.h>
23 #include <linux/extcon.h>
24 #include <linux/regulator/consumer.h>
25 
26 #include <linux/usb/otg.h>
27 
28 /*
29  * All these registers belong to OMAP's Wrapper around the
30  * DesignWare USB3 Core.
31  */
32 
33 #define USBOTGSS_REVISION			0x0000
34 #define USBOTGSS_SYSCONFIG			0x0010
35 #define USBOTGSS_IRQ_EOI			0x0020
36 #define USBOTGSS_EOI_OFFSET			0x0008
37 #define USBOTGSS_IRQSTATUS_RAW_0		0x0024
38 #define USBOTGSS_IRQSTATUS_0			0x0028
39 #define USBOTGSS_IRQENABLE_SET_0		0x002c
40 #define USBOTGSS_IRQENABLE_CLR_0		0x0030
41 #define USBOTGSS_IRQ0_OFFSET			0x0004
42 #define USBOTGSS_IRQSTATUS_RAW_1		0x0030
43 #define USBOTGSS_IRQSTATUS_1			0x0034
44 #define USBOTGSS_IRQENABLE_SET_1		0x0038
45 #define USBOTGSS_IRQENABLE_CLR_1		0x003c
46 #define USBOTGSS_IRQSTATUS_RAW_2		0x0040
47 #define USBOTGSS_IRQSTATUS_2			0x0044
48 #define USBOTGSS_IRQENABLE_SET_2		0x0048
49 #define USBOTGSS_IRQENABLE_CLR_2		0x004c
50 #define USBOTGSS_IRQSTATUS_RAW_3		0x0050
51 #define USBOTGSS_IRQSTATUS_3			0x0054
52 #define USBOTGSS_IRQENABLE_SET_3		0x0058
53 #define USBOTGSS_IRQENABLE_CLR_3		0x005c
54 #define USBOTGSS_IRQSTATUS_EOI_MISC		0x0030
55 #define USBOTGSS_IRQSTATUS_RAW_MISC		0x0034
56 #define USBOTGSS_IRQSTATUS_MISC			0x0038
57 #define USBOTGSS_IRQENABLE_SET_MISC		0x003c
58 #define USBOTGSS_IRQENABLE_CLR_MISC		0x0040
59 #define USBOTGSS_IRQMISC_OFFSET			0x03fc
60 #define USBOTGSS_UTMI_OTG_STATUS		0x0080
61 #define USBOTGSS_UTMI_OTG_CTRL			0x0084
62 #define USBOTGSS_UTMI_OTG_OFFSET		0x0480
63 #define USBOTGSS_TXFIFO_DEPTH			0x0508
64 #define USBOTGSS_RXFIFO_DEPTH			0x050c
65 #define USBOTGSS_MMRAM_OFFSET			0x0100
66 #define USBOTGSS_FLADJ				0x0104
67 #define USBOTGSS_DEBUG_CFG			0x0108
68 #define USBOTGSS_DEBUG_DATA			0x010c
69 #define USBOTGSS_DEV_EBC_EN			0x0110
70 #define USBOTGSS_DEBUG_OFFSET			0x0600
71 
72 /* SYSCONFIG REGISTER */
73 #define USBOTGSS_SYSCONFIG_DMADISABLE		BIT(16)
74 
75 /* IRQ_EOI REGISTER */
76 #define USBOTGSS_IRQ_EOI_LINE_NUMBER		BIT(0)
77 
78 /* IRQS0 BITS */
79 #define USBOTGSS_IRQO_COREIRQ_ST		BIT(0)
80 
81 /* IRQMISC BITS */
82 #define USBOTGSS_IRQMISC_DMADISABLECLR		BIT(17)
83 #define USBOTGSS_IRQMISC_OEVT			BIT(16)
84 #define USBOTGSS_IRQMISC_DRVVBUS_RISE		BIT(13)
85 #define USBOTGSS_IRQMISC_CHRGVBUS_RISE		BIT(12)
86 #define USBOTGSS_IRQMISC_DISCHRGVBUS_RISE	BIT(11)
87 #define USBOTGSS_IRQMISC_IDPULLUP_RISE		BIT(8)
88 #define USBOTGSS_IRQMISC_DRVVBUS_FALL		BIT(5)
89 #define USBOTGSS_IRQMISC_CHRGVBUS_FALL		BIT(4)
90 #define USBOTGSS_IRQMISC_DISCHRGVBUS_FALL		BIT(3)
91 #define USBOTGSS_IRQMISC_IDPULLUP_FALL		BIT(0)
92 
93 /* UTMI_OTG_STATUS REGISTER */
94 #define USBOTGSS_UTMI_OTG_STATUS_DRVVBUS	BIT(5)
95 #define USBOTGSS_UTMI_OTG_STATUS_CHRGVBUS	BIT(4)
96 #define USBOTGSS_UTMI_OTG_STATUS_DISCHRGVBUS	BIT(3)
97 #define USBOTGSS_UTMI_OTG_STATUS_IDPULLUP	BIT(0)
98 
99 /* UTMI_OTG_CTRL REGISTER */
100 #define USBOTGSS_UTMI_OTG_CTRL_SW_MODE		BIT(31)
101 #define USBOTGSS_UTMI_OTG_CTRL_POWERPRESENT	BIT(9)
102 #define USBOTGSS_UTMI_OTG_CTRL_TXBITSTUFFENABLE BIT(8)
103 #define USBOTGSS_UTMI_OTG_CTRL_IDDIG		BIT(4)
104 #define USBOTGSS_UTMI_OTG_CTRL_SESSEND		BIT(3)
105 #define USBOTGSS_UTMI_OTG_CTRL_SESSVALID	BIT(2)
106 #define USBOTGSS_UTMI_OTG_CTRL_VBUSVALID	BIT(1)
107 
108 enum dwc3_omap_utmi_mode {
109 	DWC3_OMAP_UTMI_MODE_UNKNOWN = 0,
110 	DWC3_OMAP_UTMI_MODE_HW,
111 	DWC3_OMAP_UTMI_MODE_SW,
112 };
113 
114 struct dwc3_omap {
115 	struct device		*dev;
116 
117 	int			irq;
118 	void __iomem		*base;
119 
120 	u32			utmi_otg_ctrl;
121 	u32			utmi_otg_offset;
122 	u32			irqmisc_offset;
123 	u32			irq_eoi_offset;
124 	u32			debug_offset;
125 	u32			irq0_offset;
126 
127 	struct extcon_dev	*edev;
128 	struct notifier_block	vbus_nb;
129 	struct notifier_block	id_nb;
130 
131 	struct regulator	*vbus_reg;
132 };
133 
134 enum omap_dwc3_vbus_id_status {
135 	OMAP_DWC3_ID_FLOAT,
136 	OMAP_DWC3_ID_GROUND,
137 	OMAP_DWC3_VBUS_OFF,
138 	OMAP_DWC3_VBUS_VALID,
139 };
140 
dwc3_omap_readl(void __iomem * base,u32 offset)141 static inline u32 dwc3_omap_readl(void __iomem *base, u32 offset)
142 {
143 	return readl(base + offset);
144 }
145 
dwc3_omap_writel(void __iomem * base,u32 offset,u32 value)146 static inline void dwc3_omap_writel(void __iomem *base, u32 offset, u32 value)
147 {
148 	writel(value, base + offset);
149 }
150 
dwc3_omap_read_utmi_ctrl(struct dwc3_omap * omap)151 static u32 dwc3_omap_read_utmi_ctrl(struct dwc3_omap *omap)
152 {
153 	return dwc3_omap_readl(omap->base, USBOTGSS_UTMI_OTG_CTRL +
154 							omap->utmi_otg_offset);
155 }
156 
dwc3_omap_write_utmi_ctrl(struct dwc3_omap * omap,u32 value)157 static void dwc3_omap_write_utmi_ctrl(struct dwc3_omap *omap, u32 value)
158 {
159 	dwc3_omap_writel(omap->base, USBOTGSS_UTMI_OTG_CTRL +
160 					omap->utmi_otg_offset, value);
161 
162 }
163 
dwc3_omap_read_irq0_status(struct dwc3_omap * omap)164 static u32 dwc3_omap_read_irq0_status(struct dwc3_omap *omap)
165 {
166 	return dwc3_omap_readl(omap->base, USBOTGSS_IRQSTATUS_RAW_0 -
167 						omap->irq0_offset);
168 }
169 
dwc3_omap_write_irq0_status(struct dwc3_omap * omap,u32 value)170 static void dwc3_omap_write_irq0_status(struct dwc3_omap *omap, u32 value)
171 {
172 	dwc3_omap_writel(omap->base, USBOTGSS_IRQSTATUS_0 -
173 						omap->irq0_offset, value);
174 
175 }
176 
dwc3_omap_read_irqmisc_status(struct dwc3_omap * omap)177 static u32 dwc3_omap_read_irqmisc_status(struct dwc3_omap *omap)
178 {
179 	return dwc3_omap_readl(omap->base, USBOTGSS_IRQSTATUS_RAW_MISC +
180 						omap->irqmisc_offset);
181 }
182 
dwc3_omap_write_irqmisc_status(struct dwc3_omap * omap,u32 value)183 static void dwc3_omap_write_irqmisc_status(struct dwc3_omap *omap, u32 value)
184 {
185 	dwc3_omap_writel(omap->base, USBOTGSS_IRQSTATUS_MISC +
186 					omap->irqmisc_offset, value);
187 
188 }
189 
dwc3_omap_write_irqmisc_set(struct dwc3_omap * omap,u32 value)190 static void dwc3_omap_write_irqmisc_set(struct dwc3_omap *omap, u32 value)
191 {
192 	dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_SET_MISC +
193 						omap->irqmisc_offset, value);
194 
195 }
196 
dwc3_omap_write_irq0_set(struct dwc3_omap * omap,u32 value)197 static void dwc3_omap_write_irq0_set(struct dwc3_omap *omap, u32 value)
198 {
199 	dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_SET_0 -
200 						omap->irq0_offset, value);
201 }
202 
dwc3_omap_write_irqmisc_clr(struct dwc3_omap * omap,u32 value)203 static void dwc3_omap_write_irqmisc_clr(struct dwc3_omap *omap, u32 value)
204 {
205 	dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_CLR_MISC +
206 						omap->irqmisc_offset, value);
207 }
208 
dwc3_omap_write_irq0_clr(struct dwc3_omap * omap,u32 value)209 static void dwc3_omap_write_irq0_clr(struct dwc3_omap *omap, u32 value)
210 {
211 	dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_CLR_0 -
212 						omap->irq0_offset, value);
213 }
214 
dwc3_omap_set_mailbox(struct dwc3_omap * omap,enum omap_dwc3_vbus_id_status status)215 static void dwc3_omap_set_mailbox(struct dwc3_omap *omap,
216 	enum omap_dwc3_vbus_id_status status)
217 {
218 	int	ret;
219 	u32	val;
220 
221 	switch (status) {
222 	case OMAP_DWC3_ID_GROUND:
223 		if (omap->vbus_reg) {
224 			ret = regulator_enable(omap->vbus_reg);
225 			if (ret) {
226 				dev_err(omap->dev, "regulator enable failed\n");
227 				return;
228 			}
229 		}
230 
231 		val = dwc3_omap_read_utmi_ctrl(omap);
232 		val &= ~USBOTGSS_UTMI_OTG_CTRL_IDDIG;
233 		dwc3_omap_write_utmi_ctrl(omap, val);
234 		break;
235 
236 	case OMAP_DWC3_VBUS_VALID:
237 		val = dwc3_omap_read_utmi_ctrl(omap);
238 		val &= ~USBOTGSS_UTMI_OTG_CTRL_SESSEND;
239 		val |= USBOTGSS_UTMI_OTG_CTRL_VBUSVALID
240 				| USBOTGSS_UTMI_OTG_CTRL_SESSVALID;
241 		dwc3_omap_write_utmi_ctrl(omap, val);
242 		break;
243 
244 	case OMAP_DWC3_ID_FLOAT:
245 		if (omap->vbus_reg && regulator_is_enabled(omap->vbus_reg))
246 			regulator_disable(omap->vbus_reg);
247 		val = dwc3_omap_read_utmi_ctrl(omap);
248 		val |= USBOTGSS_UTMI_OTG_CTRL_IDDIG;
249 		dwc3_omap_write_utmi_ctrl(omap, val);
250 		break;
251 
252 	case OMAP_DWC3_VBUS_OFF:
253 		val = dwc3_omap_read_utmi_ctrl(omap);
254 		val &= ~(USBOTGSS_UTMI_OTG_CTRL_SESSVALID
255 				| USBOTGSS_UTMI_OTG_CTRL_VBUSVALID);
256 		val |= USBOTGSS_UTMI_OTG_CTRL_SESSEND;
257 		dwc3_omap_write_utmi_ctrl(omap, val);
258 		break;
259 
260 	default:
261 		dev_WARN(omap->dev, "invalid state\n");
262 	}
263 }
264 
265 static void dwc3_omap_enable_irqs(struct dwc3_omap *omap);
266 static void dwc3_omap_disable_irqs(struct dwc3_omap *omap);
267 
dwc3_omap_interrupt(int irq,void * _omap)268 static irqreturn_t dwc3_omap_interrupt(int irq, void *_omap)
269 {
270 	struct dwc3_omap	*omap = _omap;
271 
272 	if (dwc3_omap_read_irqmisc_status(omap) ||
273 	    dwc3_omap_read_irq0_status(omap)) {
274 		/* mask irqs */
275 		dwc3_omap_disable_irqs(omap);
276 		return IRQ_WAKE_THREAD;
277 	}
278 
279 	return IRQ_NONE;
280 }
281 
dwc3_omap_interrupt_thread(int irq,void * _omap)282 static irqreturn_t dwc3_omap_interrupt_thread(int irq, void *_omap)
283 {
284 	struct dwc3_omap	*omap = _omap;
285 	u32			reg;
286 
287 	/* clear irq status flags */
288 	reg = dwc3_omap_read_irqmisc_status(omap);
289 	dwc3_omap_write_irqmisc_status(omap, reg);
290 
291 	reg = dwc3_omap_read_irq0_status(omap);
292 	dwc3_omap_write_irq0_status(omap, reg);
293 
294 	/* unmask irqs */
295 	dwc3_omap_enable_irqs(omap);
296 
297 	return IRQ_HANDLED;
298 }
299 
dwc3_omap_enable_irqs(struct dwc3_omap * omap)300 static void dwc3_omap_enable_irqs(struct dwc3_omap *omap)
301 {
302 	u32			reg;
303 
304 	/* enable all IRQs */
305 	reg = USBOTGSS_IRQO_COREIRQ_ST;
306 	dwc3_omap_write_irq0_set(omap, reg);
307 
308 	reg = (USBOTGSS_IRQMISC_OEVT |
309 			USBOTGSS_IRQMISC_DRVVBUS_RISE |
310 			USBOTGSS_IRQMISC_CHRGVBUS_RISE |
311 			USBOTGSS_IRQMISC_DISCHRGVBUS_RISE |
312 			USBOTGSS_IRQMISC_IDPULLUP_RISE |
313 			USBOTGSS_IRQMISC_DRVVBUS_FALL |
314 			USBOTGSS_IRQMISC_CHRGVBUS_FALL |
315 			USBOTGSS_IRQMISC_DISCHRGVBUS_FALL |
316 			USBOTGSS_IRQMISC_IDPULLUP_FALL);
317 
318 	dwc3_omap_write_irqmisc_set(omap, reg);
319 }
320 
dwc3_omap_disable_irqs(struct dwc3_omap * omap)321 static void dwc3_omap_disable_irqs(struct dwc3_omap *omap)
322 {
323 	u32			reg;
324 
325 	/* disable all IRQs */
326 	reg = USBOTGSS_IRQO_COREIRQ_ST;
327 	dwc3_omap_write_irq0_clr(omap, reg);
328 
329 	reg = (USBOTGSS_IRQMISC_OEVT |
330 			USBOTGSS_IRQMISC_DRVVBUS_RISE |
331 			USBOTGSS_IRQMISC_CHRGVBUS_RISE |
332 			USBOTGSS_IRQMISC_DISCHRGVBUS_RISE |
333 			USBOTGSS_IRQMISC_IDPULLUP_RISE |
334 			USBOTGSS_IRQMISC_DRVVBUS_FALL |
335 			USBOTGSS_IRQMISC_CHRGVBUS_FALL |
336 			USBOTGSS_IRQMISC_DISCHRGVBUS_FALL |
337 			USBOTGSS_IRQMISC_IDPULLUP_FALL);
338 
339 	dwc3_omap_write_irqmisc_clr(omap, reg);
340 }
341 
dwc3_omap_id_notifier(struct notifier_block * nb,unsigned long event,void * ptr)342 static int dwc3_omap_id_notifier(struct notifier_block *nb,
343 	unsigned long event, void *ptr)
344 {
345 	struct dwc3_omap *omap = container_of(nb, struct dwc3_omap, id_nb);
346 
347 	if (event)
348 		dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_GROUND);
349 	else
350 		dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_FLOAT);
351 
352 	return NOTIFY_DONE;
353 }
354 
dwc3_omap_vbus_notifier(struct notifier_block * nb,unsigned long event,void * ptr)355 static int dwc3_omap_vbus_notifier(struct notifier_block *nb,
356 	unsigned long event, void *ptr)
357 {
358 	struct dwc3_omap *omap = container_of(nb, struct dwc3_omap, vbus_nb);
359 
360 	if (event)
361 		dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_VALID);
362 	else
363 		dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_OFF);
364 
365 	return NOTIFY_DONE;
366 }
367 
dwc3_omap_map_offset(struct dwc3_omap * omap)368 static void dwc3_omap_map_offset(struct dwc3_omap *omap)
369 {
370 	struct device_node	*node = omap->dev->of_node;
371 
372 	/*
373 	 * Differentiate between OMAP5 and AM437x.
374 	 *
375 	 * For OMAP5(ES2.0) and AM437x wrapper revision is same, even
376 	 * though there are changes in wrapper register offsets.
377 	 *
378 	 * Using dt compatible to differentiate AM437x.
379 	 */
380 	if (of_device_is_compatible(node, "ti,am437x-dwc3")) {
381 		omap->irq_eoi_offset = USBOTGSS_EOI_OFFSET;
382 		omap->irq0_offset = USBOTGSS_IRQ0_OFFSET;
383 		omap->irqmisc_offset = USBOTGSS_IRQMISC_OFFSET;
384 		omap->utmi_otg_offset = USBOTGSS_UTMI_OTG_OFFSET;
385 		omap->debug_offset = USBOTGSS_DEBUG_OFFSET;
386 	}
387 }
388 
dwc3_omap_set_utmi_mode(struct dwc3_omap * omap)389 static void dwc3_omap_set_utmi_mode(struct dwc3_omap *omap)
390 {
391 	u32			reg;
392 	struct device_node	*node = omap->dev->of_node;
393 	u32			utmi_mode = 0;
394 
395 	reg = dwc3_omap_read_utmi_ctrl(omap);
396 
397 	of_property_read_u32(node, "utmi-mode", &utmi_mode);
398 
399 	switch (utmi_mode) {
400 	case DWC3_OMAP_UTMI_MODE_SW:
401 		reg |= USBOTGSS_UTMI_OTG_CTRL_SW_MODE;
402 		break;
403 	case DWC3_OMAP_UTMI_MODE_HW:
404 		reg &= ~USBOTGSS_UTMI_OTG_CTRL_SW_MODE;
405 		break;
406 	default:
407 		dev_WARN(omap->dev, "UNKNOWN utmi mode %d\n", utmi_mode);
408 	}
409 
410 	dwc3_omap_write_utmi_ctrl(omap, reg);
411 }
412 
dwc3_omap_extcon_register(struct dwc3_omap * omap)413 static int dwc3_omap_extcon_register(struct dwc3_omap *omap)
414 {
415 	int			ret;
416 	struct device_node	*node = omap->dev->of_node;
417 	struct extcon_dev	*edev;
418 
419 	if (of_property_read_bool(node, "extcon")) {
420 		edev = extcon_get_edev_by_phandle(omap->dev, 0);
421 		if (IS_ERR(edev)) {
422 			dev_vdbg(omap->dev, "couldn't get extcon device\n");
423 			return -EPROBE_DEFER;
424 		}
425 
426 		omap->vbus_nb.notifier_call = dwc3_omap_vbus_notifier;
427 		ret = devm_extcon_register_notifier(omap->dev, edev,
428 						EXTCON_USB, &omap->vbus_nb);
429 		if (ret < 0)
430 			dev_vdbg(omap->dev, "failed to register notifier for USB\n");
431 
432 		omap->id_nb.notifier_call = dwc3_omap_id_notifier;
433 		ret = devm_extcon_register_notifier(omap->dev, edev,
434 						EXTCON_USB_HOST, &omap->id_nb);
435 		if (ret < 0)
436 			dev_vdbg(omap->dev, "failed to register notifier for USB-HOST\n");
437 
438 		if (extcon_get_state(edev, EXTCON_USB) == true)
439 			dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_VALID);
440 		else
441 			dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_OFF);
442 
443 		if (extcon_get_state(edev, EXTCON_USB_HOST) == true)
444 			dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_GROUND);
445 		else
446 			dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_FLOAT);
447 
448 		omap->edev = edev;
449 	}
450 
451 	return 0;
452 }
453 
dwc3_omap_probe(struct platform_device * pdev)454 static int dwc3_omap_probe(struct platform_device *pdev)
455 {
456 	struct device_node	*node = pdev->dev.of_node;
457 
458 	struct dwc3_omap	*omap;
459 	struct device		*dev = &pdev->dev;
460 	struct regulator	*vbus_reg = NULL;
461 
462 	int			ret;
463 	int			irq;
464 
465 	void __iomem		*base;
466 
467 	if (!node) {
468 		dev_err(dev, "device node not found\n");
469 		return -EINVAL;
470 	}
471 
472 	omap = devm_kzalloc(dev, sizeof(*omap), GFP_KERNEL);
473 	if (!omap)
474 		return -ENOMEM;
475 
476 	platform_set_drvdata(pdev, omap);
477 
478 	irq = platform_get_irq(pdev, 0);
479 	if (irq < 0)
480 		return irq;
481 
482 	base = devm_platform_ioremap_resource(pdev, 0);
483 	if (IS_ERR(base))
484 		return PTR_ERR(base);
485 
486 	if (of_property_read_bool(node, "vbus-supply")) {
487 		vbus_reg = devm_regulator_get(dev, "vbus");
488 		if (IS_ERR(vbus_reg)) {
489 			dev_err(dev, "vbus init failed\n");
490 			return PTR_ERR(vbus_reg);
491 		}
492 	}
493 
494 	omap->dev	= dev;
495 	omap->irq	= irq;
496 	omap->base	= base;
497 	omap->vbus_reg	= vbus_reg;
498 
499 	pm_runtime_enable(dev);
500 	ret = pm_runtime_get_sync(dev);
501 	if (ret < 0) {
502 		dev_err(dev, "get_sync failed with err %d\n", ret);
503 		goto err1;
504 	}
505 
506 	dwc3_omap_map_offset(omap);
507 	dwc3_omap_set_utmi_mode(omap);
508 
509 	ret = dwc3_omap_extcon_register(omap);
510 	if (ret < 0)
511 		goto err1;
512 
513 	ret = of_platform_populate(node, NULL, NULL, dev);
514 	if (ret) {
515 		dev_err(&pdev->dev, "failed to create dwc3 core\n");
516 		goto err1;
517 	}
518 
519 	ret = devm_request_threaded_irq(dev, omap->irq, dwc3_omap_interrupt,
520 					dwc3_omap_interrupt_thread, IRQF_SHARED,
521 					"dwc3-omap", omap);
522 	if (ret) {
523 		dev_err(dev, "failed to request IRQ #%d --> %d\n",
524 			omap->irq, ret);
525 		goto err2;
526 	}
527 	dwc3_omap_enable_irqs(omap);
528 	return 0;
529 
530 err2:
531 	of_platform_depopulate(dev);
532 err1:
533 	pm_runtime_put_sync(dev);
534 	pm_runtime_disable(dev);
535 
536 	return ret;
537 }
538 
dwc3_omap_remove(struct platform_device * pdev)539 static void dwc3_omap_remove(struct platform_device *pdev)
540 {
541 	struct dwc3_omap	*omap = platform_get_drvdata(pdev);
542 
543 	dwc3_omap_disable_irqs(omap);
544 	disable_irq(omap->irq);
545 	of_platform_depopulate(omap->dev);
546 	pm_runtime_put_sync(&pdev->dev);
547 	pm_runtime_disable(&pdev->dev);
548 }
549 
550 static const struct of_device_id of_dwc3_match[] = {
551 	{
552 		.compatible =	"ti,dwc3"
553 	},
554 	{
555 		.compatible =	"ti,am437x-dwc3"
556 	},
557 	{ },
558 };
559 MODULE_DEVICE_TABLE(of, of_dwc3_match);
560 
561 #ifdef CONFIG_PM_SLEEP
dwc3_omap_suspend(struct device * dev)562 static int dwc3_omap_suspend(struct device *dev)
563 {
564 	struct dwc3_omap	*omap = dev_get_drvdata(dev);
565 
566 	omap->utmi_otg_ctrl = dwc3_omap_read_utmi_ctrl(omap);
567 	dwc3_omap_disable_irqs(omap);
568 
569 	return 0;
570 }
571 
dwc3_omap_resume(struct device * dev)572 static int dwc3_omap_resume(struct device *dev)
573 {
574 	struct dwc3_omap	*omap = dev_get_drvdata(dev);
575 
576 	dwc3_omap_write_utmi_ctrl(omap, omap->utmi_otg_ctrl);
577 	dwc3_omap_enable_irqs(omap);
578 
579 	pm_runtime_disable(dev);
580 	pm_runtime_set_active(dev);
581 	pm_runtime_enable(dev);
582 
583 	return 0;
584 }
585 
dwc3_omap_complete(struct device * dev)586 static void dwc3_omap_complete(struct device *dev)
587 {
588 	struct dwc3_omap	*omap = dev_get_drvdata(dev);
589 
590 	if (extcon_get_state(omap->edev, EXTCON_USB))
591 		dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_VALID);
592 	else
593 		dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_OFF);
594 
595 	if (extcon_get_state(omap->edev, EXTCON_USB_HOST))
596 		dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_GROUND);
597 	else
598 		dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_FLOAT);
599 }
600 
601 static const struct dev_pm_ops dwc3_omap_dev_pm_ops = {
602 
603 	SET_SYSTEM_SLEEP_PM_OPS(dwc3_omap_suspend, dwc3_omap_resume)
604 	.complete = dwc3_omap_complete,
605 };
606 
607 #define DEV_PM_OPS	(&dwc3_omap_dev_pm_ops)
608 #else
609 #define DEV_PM_OPS	NULL
610 #endif /* CONFIG_PM_SLEEP */
611 
612 static struct platform_driver dwc3_omap_driver = {
613 	.probe		= dwc3_omap_probe,
614 	.remove_new	= dwc3_omap_remove,
615 	.driver		= {
616 		.name	= "omap-dwc3",
617 		.of_match_table	= of_dwc3_match,
618 		.pm	= DEV_PM_OPS,
619 	},
620 };
621 
622 module_platform_driver(dwc3_omap_driver);
623 
624 MODULE_ALIAS("platform:omap-dwc3");
625 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
626 MODULE_LICENSE("GPL v2");
627 MODULE_DESCRIPTION("DesignWare USB3 OMAP Glue Layer");
628