1 /*
2  * Texas Instruments DSPS platforms "glue layer"
3  *
4  * Copyright (C) 2012, by Texas Instruments
5  *
6  * Based on the am35x "glue layer" code.
7  *
8  * This file is part of the Inventra Controller Driver for Linux.
9  *
10  * SPDX-License-Identifier:	GPL-2.0
11  *
12  * musb_dsps.c will be a common file for all the TI DSPS platforms
13  * such as dm64x, dm36x, dm35x, da8x, am35x and ti81x.
14  * For now only ti81x is using this and in future davinci.c, am35x.c
15  * da8xx.c would be merged to this file after testing.
16  */
17 
18 #ifndef __UBOOT__
19 #include <linux/init.h>
20 #include <linux/io.h>
21 #include <linux/err.h>
22 #include <linux/platform_device.h>
23 #include <linux/dma-mapping.h>
24 #include <linux/pm_runtime.h>
25 #include <linux/module.h>
26 
27 #include <linux/of.h>
28 #include <linux/of_device.h>
29 #include <linux/of_address.h>
30 
31 #include <plat/usb.h>
32 #else
33 #include <common.h>
34 #include <asm/omap_musb.h>
35 #include "linux-compat.h"
36 #endif
37 
38 #include "musb_core.h"
39 
40 /**
41  * avoid using musb_readx()/musb_writex() as glue layer should not be
42  * dependent on musb core layer symbols.
43  */
44 static inline u8 dsps_readb(const void __iomem *addr, unsigned offset)
45 	{ return __raw_readb(addr + offset); }
46 
47 static inline u32 dsps_readl(const void __iomem *addr, unsigned offset)
48 	{ return __raw_readl(addr + offset); }
49 
50 static inline void dsps_writeb(void __iomem *addr, unsigned offset, u8 data)
51 	{ __raw_writeb(data, addr + offset); }
52 
53 static inline void dsps_writel(void __iomem *addr, unsigned offset, u32 data)
54 	{ __raw_writel(data, addr + offset); }
55 
56 /**
57  * DSPS musb wrapper register offset.
58  * FIXME: This should be expanded to have all the wrapper registers from TI DSPS
59  * musb ips.
60  */
61 struct dsps_musb_wrapper {
62 	u16	revision;
63 	u16	control;
64 	u16	status;
65 	u16	eoi;
66 	u16	epintr_set;
67 	u16	epintr_clear;
68 	u16	epintr_status;
69 	u16	coreintr_set;
70 	u16	coreintr_clear;
71 	u16	coreintr_status;
72 	u16	phy_utmi;
73 	u16	mode;
74 
75 	/* bit positions for control */
76 	unsigned	reset:5;
77 
78 	/* bit positions for interrupt */
79 	unsigned	usb_shift:5;
80 	u32		usb_mask;
81 	u32		usb_bitmap;
82 	unsigned	drvvbus:5;
83 
84 	unsigned	txep_shift:5;
85 	u32		txep_mask;
86 	u32		txep_bitmap;
87 
88 	unsigned	rxep_shift:5;
89 	u32		rxep_mask;
90 	u32		rxep_bitmap;
91 
92 	/* bit positions for phy_utmi */
93 	unsigned	otg_disable:5;
94 
95 	/* bit positions for mode */
96 	unsigned	iddig:5;
97 	/* miscellaneous stuff */
98 	u32		musb_core_offset;
99 	u8		poll_seconds;
100 };
101 
102 static const struct dsps_musb_wrapper ti81xx_driver_data __devinitconst = {
103 	.revision		= 0x00,
104 	.control		= 0x14,
105 	.status			= 0x18,
106 	.eoi			= 0x24,
107 	.epintr_set		= 0x38,
108 	.epintr_clear		= 0x40,
109 	.epintr_status		= 0x30,
110 	.coreintr_set		= 0x3c,
111 	.coreintr_clear		= 0x44,
112 	.coreintr_status	= 0x34,
113 	.phy_utmi		= 0xe0,
114 	.mode			= 0xe8,
115 	.reset			= 0,
116 	.otg_disable		= 21,
117 	.iddig			= 8,
118 	.usb_shift		= 0,
119 	.usb_mask		= 0x1ff,
120 	.usb_bitmap		= (0x1ff << 0),
121 	.drvvbus		= 8,
122 	.txep_shift		= 0,
123 	.txep_mask		= 0xffff,
124 	.txep_bitmap		= (0xffff << 0),
125 	.rxep_shift		= 16,
126 	.rxep_mask		= 0xfffe,
127 	.rxep_bitmap		= (0xfffe << 16),
128 	.musb_core_offset	= 0x400,
129 	.poll_seconds		= 2,
130 };
131 
132 /**
133  * DSPS glue structure.
134  */
135 struct dsps_glue {
136 	struct device *dev;
137 	struct platform_device *musb;	/* child musb pdev */
138 	const struct dsps_musb_wrapper *wrp; /* wrapper register offsets */
139 	struct timer_list timer;	/* otg_workaround timer */
140 };
141 
142 /**
143  * dsps_musb_enable - enable interrupts
144  */
145 #ifndef __UBOOT__
146 static void dsps_musb_enable(struct musb *musb)
147 #else
148 static int dsps_musb_enable(struct musb *musb)
149 #endif
150 {
151 #ifndef __UBOOT__
152 	struct device *dev = musb->controller;
153 	struct platform_device *pdev = to_platform_device(dev->parent);
154 	struct dsps_glue *glue = platform_get_drvdata(pdev);
155 	const struct dsps_musb_wrapper *wrp = glue->wrp;
156 #else
157 	const struct dsps_musb_wrapper *wrp = &ti81xx_driver_data;
158 #endif
159 	void __iomem *reg_base = musb->ctrl_base;
160 	u32 epmask, coremask;
161 
162 	/* Workaround: setup IRQs through both register sets. */
163 	epmask = ((musb->epmask & wrp->txep_mask) << wrp->txep_shift) |
164 	       ((musb->epmask & wrp->rxep_mask) << wrp->rxep_shift);
165 	coremask = (wrp->usb_bitmap & ~MUSB_INTR_SOF);
166 
167 	dsps_writel(reg_base, wrp->epintr_set, epmask);
168 	dsps_writel(reg_base, wrp->coreintr_set, coremask);
169 	/* Force the DRVVBUS IRQ so we can start polling for ID change. */
170 #ifndef __UBOOT__
171 	if (is_otg_enabled(musb))
172 		dsps_writel(reg_base, wrp->coreintr_set,
173 			    (1 << wrp->drvvbus) << wrp->usb_shift);
174 #else
175 	return 0;
176 #endif
177 }
178 
179 /**
180  * dsps_musb_disable - disable HDRC and flush interrupts
181  */
182 static void dsps_musb_disable(struct musb *musb)
183 {
184 #ifndef __UBOOT__
185 	struct device *dev = musb->controller;
186 	struct platform_device *pdev = to_platform_device(dev->parent);
187 	struct dsps_glue *glue = platform_get_drvdata(pdev);
188 	const struct dsps_musb_wrapper *wrp = glue->wrp;
189 	void __iomem *reg_base = musb->ctrl_base;
190 
191 	dsps_writel(reg_base, wrp->coreintr_clear, wrp->usb_bitmap);
192 	dsps_writel(reg_base, wrp->epintr_clear,
193 			 wrp->txep_bitmap | wrp->rxep_bitmap);
194 	dsps_writeb(musb->mregs, MUSB_DEVCTL, 0);
195 	dsps_writel(reg_base, wrp->eoi, 0);
196 #endif
197 }
198 
199 #ifndef __UBOOT__
200 static void otg_timer(unsigned long _musb)
201 {
202 	struct musb *musb = (void *)_musb;
203 	void __iomem *mregs = musb->mregs;
204 	struct device *dev = musb->controller;
205 	struct platform_device *pdev = to_platform_device(dev->parent);
206 	struct dsps_glue *glue = platform_get_drvdata(pdev);
207 	const struct dsps_musb_wrapper *wrp = glue->wrp;
208 	u8 devctl;
209 	unsigned long flags;
210 
211 	/*
212 	 * We poll because DSPS IP's won't expose several OTG-critical
213 	 * status change events (from the transceiver) otherwise.
214 	 */
215 	devctl = dsps_readb(mregs, MUSB_DEVCTL);
216 	dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl,
217 				otg_state_string(musb->xceiv->state));
218 
219 	spin_lock_irqsave(&musb->lock, flags);
220 	switch (musb->xceiv->state) {
221 	case OTG_STATE_A_WAIT_BCON:
222 		devctl &= ~MUSB_DEVCTL_SESSION;
223 		dsps_writeb(musb->mregs, MUSB_DEVCTL, devctl);
224 
225 		devctl = dsps_readb(musb->mregs, MUSB_DEVCTL);
226 		if (devctl & MUSB_DEVCTL_BDEVICE) {
227 			musb->xceiv->state = OTG_STATE_B_IDLE;
228 			MUSB_DEV_MODE(musb);
229 		} else {
230 			musb->xceiv->state = OTG_STATE_A_IDLE;
231 			MUSB_HST_MODE(musb);
232 		}
233 		break;
234 	case OTG_STATE_A_WAIT_VFALL:
235 		musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
236 		dsps_writel(musb->ctrl_base, wrp->coreintr_set,
237 			    MUSB_INTR_VBUSERROR << wrp->usb_shift);
238 		break;
239 	case OTG_STATE_B_IDLE:
240 		if (!is_peripheral_enabled(musb))
241 			break;
242 
243 		devctl = dsps_readb(mregs, MUSB_DEVCTL);
244 		if (devctl & MUSB_DEVCTL_BDEVICE)
245 			mod_timer(&glue->timer,
246 					jiffies + wrp->poll_seconds * HZ);
247 		else
248 			musb->xceiv->state = OTG_STATE_A_IDLE;
249 		break;
250 	default:
251 		break;
252 	}
253 	spin_unlock_irqrestore(&musb->lock, flags);
254 }
255 
256 static void dsps_musb_try_idle(struct musb *musb, unsigned long timeout)
257 {
258 	struct device *dev = musb->controller;
259 	struct platform_device *pdev = to_platform_device(dev->parent);
260 	struct dsps_glue *glue = platform_get_drvdata(pdev);
261 	static unsigned long last_timer;
262 
263 	if (!is_otg_enabled(musb))
264 		return;
265 
266 	if (timeout == 0)
267 		timeout = jiffies + msecs_to_jiffies(3);
268 
269 	/* Never idle if active, or when VBUS timeout is not set as host */
270 	if (musb->is_active || (musb->a_wait_bcon == 0 &&
271 				musb->xceiv->state == OTG_STATE_A_WAIT_BCON)) {
272 		dev_dbg(musb->controller, "%s active, deleting timer\n",
273 				otg_state_string(musb->xceiv->state));
274 		del_timer(&glue->timer);
275 		last_timer = jiffies;
276 		return;
277 	}
278 
279 	if (time_after(last_timer, timeout) && timer_pending(&glue->timer)) {
280 		dev_dbg(musb->controller,
281 			"Longer idle timer already pending, ignoring...\n");
282 		return;
283 	}
284 	last_timer = timeout;
285 
286 	dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n",
287 		otg_state_string(musb->xceiv->state),
288 			jiffies_to_msecs(timeout - jiffies));
289 	mod_timer(&glue->timer, timeout);
290 }
291 #endif
292 
293 static irqreturn_t dsps_interrupt(int irq, void *hci)
294 {
295 	struct musb  *musb = hci;
296 	void __iomem *reg_base = musb->ctrl_base;
297 #ifndef __UBOOT__
298 	struct device *dev = musb->controller;
299 	struct platform_device *pdev = to_platform_device(dev->parent);
300 	struct dsps_glue *glue = platform_get_drvdata(pdev);
301 	const struct dsps_musb_wrapper *wrp = glue->wrp;
302 #else
303 	const struct dsps_musb_wrapper *wrp = &ti81xx_driver_data;
304 #endif
305 	unsigned long flags;
306 	irqreturn_t ret = IRQ_NONE;
307 	u32 epintr, usbintr;
308 
309 	spin_lock_irqsave(&musb->lock, flags);
310 
311 	/* Get endpoint interrupts */
312 	epintr = dsps_readl(reg_base, wrp->epintr_status);
313 	musb->int_rx = (epintr & wrp->rxep_bitmap) >> wrp->rxep_shift;
314 	musb->int_tx = (epintr & wrp->txep_bitmap) >> wrp->txep_shift;
315 
316 	if (epintr)
317 		dsps_writel(reg_base, wrp->epintr_status, epintr);
318 
319 	/* Get usb core interrupts */
320 	usbintr = dsps_readl(reg_base, wrp->coreintr_status);
321 	if (!usbintr && !epintr)
322 		goto eoi;
323 
324 	musb->int_usb =	(usbintr & wrp->usb_bitmap) >> wrp->usb_shift;
325 	if (usbintr)
326 		dsps_writel(reg_base, wrp->coreintr_status, usbintr);
327 
328 	dev_dbg(musb->controller, "usbintr (%x) epintr(%x)\n",
329 			usbintr, epintr);
330 #ifndef __UBOOT__
331 	/*
332 	 * DRVVBUS IRQs are the only proxy we have (a very poor one!) for
333 	 * DSPS IP's missing ID change IRQ.  We need an ID change IRQ to
334 	 * switch appropriately between halves of the OTG state machine.
335 	 * Managing DEVCTL.SESSION per Mentor docs requires that we know its
336 	 * value but DEVCTL.BDEVICE is invalid without DEVCTL.SESSION set.
337 	 * Also, DRVVBUS pulses for SRP (but not at 5V) ...
338 	 */
339 	if ((usbintr & MUSB_INTR_BABBLE) && is_host_enabled(musb))
340 		pr_info("CAUTION: musb: Babble Interrupt Occured\n");
341 
342 	if (usbintr & ((1 << wrp->drvvbus) << wrp->usb_shift)) {
343 		int drvvbus = dsps_readl(reg_base, wrp->status);
344 		void __iomem *mregs = musb->mregs;
345 		u8 devctl = dsps_readb(mregs, MUSB_DEVCTL);
346 		int err;
347 
348 		err = is_host_enabled(musb) && (musb->int_usb &
349 						MUSB_INTR_VBUSERROR);
350 		if (err) {
351 			/*
352 			 * The Mentor core doesn't debounce VBUS as needed
353 			 * to cope with device connect current spikes. This
354 			 * means it's not uncommon for bus-powered devices
355 			 * to get VBUS errors during enumeration.
356 			 *
357 			 * This is a workaround, but newer RTL from Mentor
358 			 * seems to allow a better one: "re"-starting sessions
359 			 * without waiting for VBUS to stop registering in
360 			 * devctl.
361 			 */
362 			musb->int_usb &= ~MUSB_INTR_VBUSERROR;
363 			musb->xceiv->state = OTG_STATE_A_WAIT_VFALL;
364 			mod_timer(&glue->timer,
365 					jiffies + wrp->poll_seconds * HZ);
366 			WARNING("VBUS error workaround (delay coming)\n");
367 		} else if (is_host_enabled(musb) && drvvbus) {
368 			musb->is_active = 1;
369 			MUSB_HST_MODE(musb);
370 			musb->xceiv->otg->default_a = 1;
371 			musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
372 			del_timer(&glue->timer);
373 		} else {
374 			musb->is_active = 0;
375 			MUSB_DEV_MODE(musb);
376 			musb->xceiv->otg->default_a = 0;
377 			musb->xceiv->state = OTG_STATE_B_IDLE;
378 		}
379 
380 		/* NOTE: this must complete power-on within 100 ms. */
381 		dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n",
382 				drvvbus ? "on" : "off",
383 				otg_state_string(musb->xceiv->state),
384 				err ? " ERROR" : "",
385 				devctl);
386 		ret = IRQ_HANDLED;
387 	}
388 #endif
389 
390 	if (musb->int_tx || musb->int_rx || musb->int_usb)
391 		ret |= musb_interrupt(musb);
392 
393  eoi:
394 	/* EOI needs to be written for the IRQ to be re-asserted. */
395 	if (ret == IRQ_HANDLED || epintr || usbintr)
396 		dsps_writel(reg_base, wrp->eoi, 1);
397 
398 #ifndef __UBOOT__
399 	/* Poll for ID change */
400 	if (is_otg_enabled(musb) && musb->xceiv->state == OTG_STATE_B_IDLE)
401 		mod_timer(&glue->timer, jiffies + wrp->poll_seconds * HZ);
402 #endif
403 
404 	spin_unlock_irqrestore(&musb->lock, flags);
405 
406 	return ret;
407 }
408 
409 static int dsps_musb_init(struct musb *musb)
410 {
411 #ifndef __UBOOT__
412 	struct device *dev = musb->controller;
413 	struct musb_hdrc_platform_data *plat = dev->platform_data;
414 	struct platform_device *pdev = to_platform_device(dev->parent);
415 	struct dsps_glue *glue = platform_get_drvdata(pdev);
416 	const struct dsps_musb_wrapper *wrp = glue->wrp;
417 	struct omap_musb_board_data *data = plat->board_data;
418 #else
419 	struct omap_musb_board_data *data =
420 			(struct omap_musb_board_data *)musb->controller;
421 	const struct dsps_musb_wrapper *wrp = &ti81xx_driver_data;
422 #endif
423 	void __iomem *reg_base = musb->ctrl_base;
424 	u32 rev, val;
425 	int status;
426 
427 	/* mentor core register starts at offset of 0x400 from musb base */
428 	musb->mregs += wrp->musb_core_offset;
429 
430 #ifndef __UBOOT__
431 	/* NOP driver needs change if supporting dual instance */
432 	usb_nop_xceiv_register();
433 	musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
434 	if (IS_ERR_OR_NULL(musb->xceiv))
435 		return -ENODEV;
436 #endif
437 
438 	/* Returns zero if e.g. not clocked */
439 	rev = dsps_readl(reg_base, wrp->revision);
440 	if (!rev) {
441 		status = -ENODEV;
442 		goto err0;
443 	}
444 
445 #ifndef __UBOOT__
446 	if (is_host_enabled(musb))
447 		setup_timer(&glue->timer, otg_timer, (unsigned long) musb);
448 #endif
449 
450 	/* Reset the musb */
451 	dsps_writel(reg_base, wrp->control, (1 << wrp->reset));
452 
453 	/* Start the on-chip PHY and its PLL. */
454 	if (data->set_phy_power)
455 		data->set_phy_power(data->dev, 1);
456 
457 	musb->isr = dsps_interrupt;
458 
459 	/* reset the otgdisable bit, needed for host mode to work */
460 	val = dsps_readl(reg_base, wrp->phy_utmi);
461 	val &= ~(1 << wrp->otg_disable);
462 	dsps_writel(musb->ctrl_base, wrp->phy_utmi, val);
463 
464 	/* clear level interrupt */
465 	dsps_writel(reg_base, wrp->eoi, 0);
466 
467 	return 0;
468 err0:
469 #ifndef __UBOOT__
470 	usb_put_phy(musb->xceiv);
471 	usb_nop_xceiv_unregister();
472 #endif
473 	return status;
474 }
475 
476 static int dsps_musb_exit(struct musb *musb)
477 {
478 #ifndef __UBOOT__
479 	struct device *dev = musb->controller;
480 	struct musb_hdrc_platform_data *plat = dev->platform_data;
481 	struct omap_musb_board_data *data = plat->board_data;
482 	struct platform_device *pdev = to_platform_device(dev->parent);
483 	struct dsps_glue *glue = platform_get_drvdata(pdev);
484 #else
485 	struct omap_musb_board_data *data =
486 			(struct omap_musb_board_data *)musb->controller;
487 #endif
488 
489 #ifndef __UBOOT__
490 	if (is_host_enabled(musb))
491 		del_timer_sync(&glue->timer);
492 #endif
493 
494 	/* Shutdown the on-chip PHY and its PLL. */
495 	if (data->set_phy_power)
496 		data->set_phy_power(data->dev, 0);
497 
498 #ifndef __UBOOT__
499 	/* NOP driver needs change if supporting dual instance */
500 	usb_put_phy(musb->xceiv);
501 	usb_nop_xceiv_unregister();
502 #endif
503 
504 	return 0;
505 }
506 
507 #ifndef __UBOOT__
508 static struct musb_platform_ops dsps_ops = {
509 #else
510 struct musb_platform_ops musb_dsps_ops = {
511 #endif
512 	.init		= dsps_musb_init,
513 	.exit		= dsps_musb_exit,
514 
515 	.enable		= dsps_musb_enable,
516 	.disable	= dsps_musb_disable,
517 
518 #ifndef __UBOOT__
519 	.try_idle	= dsps_musb_try_idle,
520 #endif
521 };
522 
523 #ifndef __UBOOT__
524 static u64 musb_dmamask = DMA_BIT_MASK(32);
525 #endif
526 
527 #ifndef __UBOOT__
528 static int __devinit dsps_create_musb_pdev(struct dsps_glue *glue, u8 id)
529 {
530 	struct device *dev = glue->dev;
531 	struct platform_device *pdev = to_platform_device(dev);
532 	struct musb_hdrc_platform_data  *pdata = dev->platform_data;
533 	struct platform_device	*musb;
534 	struct resource *res;
535 	struct resource	resources[2];
536 	char res_name[10];
537 	int ret;
538 
539 	/* get memory resource */
540 	sprintf(res_name, "musb%d", id);
541 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, res_name);
542 	if (!res) {
543 		dev_err(dev, "%s get mem resource failed\n", res_name);
544 		ret = -ENODEV;
545 		goto err0;
546 	}
547 	res->parent = NULL;
548 	resources[0] = *res;
549 
550 	/* get irq resource */
551 	sprintf(res_name, "musb%d-irq", id);
552 	res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, res_name);
553 	if (!res) {
554 		dev_err(dev, "%s get irq resource failed\n", res_name);
555 		ret = -ENODEV;
556 		goto err0;
557 	}
558 	res->parent = NULL;
559 	resources[1] = *res;
560 	resources[1].name = "mc";
561 
562 	/* allocate the child platform device */
563 	musb = platform_device_alloc("musb-hdrc", -1);
564 	if (!musb) {
565 		dev_err(dev, "failed to allocate musb device\n");
566 		ret = -ENOMEM;
567 		goto err0;
568 	}
569 
570 	musb->dev.parent		= dev;
571 	musb->dev.dma_mask		= &musb_dmamask;
572 	musb->dev.coherent_dma_mask	= musb_dmamask;
573 
574 	glue->musb			= musb;
575 
576 	pdata->platform_ops		= &dsps_ops;
577 
578 	ret = platform_device_add_resources(musb, resources, 2);
579 	if (ret) {
580 		dev_err(dev, "failed to add resources\n");
581 		goto err1;
582 	}
583 
584 	ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
585 	if (ret) {
586 		dev_err(dev, "failed to add platform_data\n");
587 		goto err1;
588 	}
589 
590 	ret = platform_device_add(musb);
591 	if (ret) {
592 		dev_err(dev, "failed to register musb device\n");
593 		goto err1;
594 	}
595 
596 	return 0;
597 
598 err1:
599 	platform_device_put(musb);
600 err0:
601 	return ret;
602 }
603 
604 static void __devexit dsps_delete_musb_pdev(struct dsps_glue *glue)
605 {
606 	platform_device_del(glue->musb);
607 	platform_device_put(glue->musb);
608 }
609 
610 static int __devinit dsps_probe(struct platform_device *pdev)
611 {
612 	const struct platform_device_id *id = platform_get_device_id(pdev);
613 	const struct dsps_musb_wrapper *wrp =
614 				(struct dsps_musb_wrapper *)id->driver_data;
615 	struct dsps_glue *glue;
616 	struct resource *iomem;
617 	int ret;
618 
619 	/* allocate glue */
620 	glue = kzalloc(sizeof(*glue), GFP_KERNEL);
621 	if (!glue) {
622 		dev_err(&pdev->dev, "unable to allocate glue memory\n");
623 		ret = -ENOMEM;
624 		goto err0;
625 	}
626 
627 	/* get memory resource */
628 	iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
629 	if (!iomem) {
630 		dev_err(&pdev->dev, "failed to get usbss mem resource\n");
631 		ret = -ENODEV;
632 		goto err1;
633 	}
634 
635 	glue->dev = &pdev->dev;
636 
637 	glue->wrp = kmemdup(wrp, sizeof(*wrp), GFP_KERNEL);
638 	if (!glue->wrp) {
639 		dev_err(&pdev->dev, "failed to duplicate wrapper struct memory\n");
640 		ret = -ENOMEM;
641 		goto err1;
642 	}
643 	platform_set_drvdata(pdev, glue);
644 
645 	/* enable the usbss clocks */
646 	pm_runtime_enable(&pdev->dev);
647 
648 	ret = pm_runtime_get_sync(&pdev->dev);
649 	if (ret < 0) {
650 		dev_err(&pdev->dev, "pm_runtime_get_sync FAILED");
651 		goto err2;
652 	}
653 
654 	/* create the child platform device for first instances of musb */
655 	ret = dsps_create_musb_pdev(glue, 0);
656 	if (ret != 0) {
657 		dev_err(&pdev->dev, "failed to create child pdev\n");
658 		goto err3;
659 	}
660 
661 	return 0;
662 
663 err3:
664 	pm_runtime_put(&pdev->dev);
665 err2:
666 	pm_runtime_disable(&pdev->dev);
667 	kfree(glue->wrp);
668 err1:
669 	kfree(glue);
670 err0:
671 	return ret;
672 }
673 static int __devexit dsps_remove(struct platform_device *pdev)
674 {
675 	struct dsps_glue *glue = platform_get_drvdata(pdev);
676 
677 	/* delete the child platform device */
678 	dsps_delete_musb_pdev(glue);
679 
680 	/* disable usbss clocks */
681 	pm_runtime_put(&pdev->dev);
682 	pm_runtime_disable(&pdev->dev);
683 	kfree(glue->wrp);
684 	kfree(glue);
685 	return 0;
686 }
687 
688 #ifdef CONFIG_PM_SLEEP
689 static int dsps_suspend(struct device *dev)
690 {
691 	struct musb_hdrc_platform_data *plat = dev->platform_data;
692 	struct omap_musb_board_data *data = plat->board_data;
693 
694 	/* Shutdown the on-chip PHY and its PLL. */
695 	if (data->set_phy_power)
696 		data->set_phy_power(data->dev, 0);
697 
698 	return 0;
699 }
700 
701 static int dsps_resume(struct device *dev)
702 {
703 	struct musb_hdrc_platform_data *plat = dev->platform_data;
704 	struct omap_musb_board_data *data = plat->board_data;
705 
706 	/* Start the on-chip PHY and its PLL. */
707 	if (data->set_phy_power)
708 		data->set_phy_power(data->dev, 1);
709 
710 	return 0;
711 }
712 #endif
713 
714 static SIMPLE_DEV_PM_OPS(dsps_pm_ops, dsps_suspend, dsps_resume);
715 #endif
716 
717 #ifndef __UBOOT__
718 static const struct platform_device_id musb_dsps_id_table[] __devinitconst = {
719 	{
720 		.name	= "musb-ti81xx",
721 		.driver_data	= (kernel_ulong_t) &ti81xx_driver_data,
722 	},
723 	{  },	/* Terminating Entry */
724 };
725 MODULE_DEVICE_TABLE(platform, musb_dsps_id_table);
726 
727 static const struct of_device_id musb_dsps_of_match[] __devinitconst = {
728 	{ .compatible = "musb-ti81xx", },
729 	{ .compatible = "ti,ti81xx-musb", },
730 	{ .compatible = "ti,am335x-musb", },
731 	{  },
732 };
733 MODULE_DEVICE_TABLE(of, musb_dsps_of_match);
734 
735 static struct platform_driver dsps_usbss_driver = {
736 	.probe		= dsps_probe,
737 	.remove         = __devexit_p(dsps_remove),
738 	.driver         = {
739 		.name   = "musb-dsps",
740 		.pm	= &dsps_pm_ops,
741 		.of_match_table	= musb_dsps_of_match,
742 	},
743 	.id_table	= musb_dsps_id_table,
744 };
745 
746 MODULE_DESCRIPTION("TI DSPS MUSB Glue Layer");
747 MODULE_AUTHOR("Ravi B <ravibabu@ti.com>");
748 MODULE_AUTHOR("Ajay Kumar Gupta <ajay.gupta@ti.com>");
749 MODULE_LICENSE("GPL v2");
750 
751 static int __init dsps_init(void)
752 {
753 	return platform_driver_register(&dsps_usbss_driver);
754 }
755 subsys_initcall(dsps_init);
756 
757 static void __exit dsps_exit(void)
758 {
759 	platform_driver_unregister(&dsps_usbss_driver);
760 }
761 module_exit(dsps_exit);
762 #endif
763