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