1 /*
2  * MUSB OTG driver defines
3  *
4  * Copyright 2005 Mentor Graphics Corporation
5  * Copyright (C) 2005-2006 by Texas Instruments
6  * Copyright (C) 2006-2007 Nokia Corporation
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License
10  * version 2 as published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20  * 02110-1301 USA
21  *
22  * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
23  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
24  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
25  * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
28  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
29  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32  *
33  */
34 
35 #ifndef __MUSB_CORE_H__
36 #define __MUSB_CORE_H__
37 
38 #ifndef __UBOOT__
39 #include <linux/slab.h>
40 #include <linux/list.h>
41 #include <linux/interrupt.h>
42 #include <linux/errno.h>
43 #include <linux/timer.h>
44 #include <linux/device.h>
45 #include <linux/usb.h>
46 #include <linux/usb/otg.h>
47 #else
48 #include <asm/errno.h>
49 #endif
50 #include <linux/usb/ch9.h>
51 #include <linux/usb/gadget.h>
52 #include <linux/usb/musb.h>
53 
54 struct musb;
55 struct musb_hw_ep;
56 struct musb_ep;
57 
58 /* Helper defines for struct musb->hwvers */
59 #define MUSB_HWVERS_MAJOR(x)	((x >> 10) & 0x1f)
60 #define MUSB_HWVERS_MINOR(x)	(x & 0x3ff)
61 #define MUSB_HWVERS_RC		0x8000
62 #define MUSB_HWVERS_1300	0x52C
63 #define MUSB_HWVERS_1400	0x590
64 #define MUSB_HWVERS_1800	0x720
65 #define MUSB_HWVERS_1900	0x784
66 #define MUSB_HWVERS_2000	0x800
67 
68 #include "musb_debug.h"
69 #include "musb_dma.h"
70 
71 #include "musb_io.h"
72 #include "musb_regs.h"
73 
74 #include "musb_gadget.h"
75 #ifndef __UBOOT__
76 #include <linux/usb/hcd.h>
77 #endif
78 #include "musb_host.h"
79 
80 #define	is_peripheral_enabled(musb)	((musb)->board_mode != MUSB_HOST)
81 #define	is_host_enabled(musb)		((musb)->board_mode != MUSB_PERIPHERAL)
82 #define	is_otg_enabled(musb)		((musb)->board_mode == MUSB_OTG)
83 
84 /* NOTE:  otg and peripheral-only state machines start at B_IDLE.
85  * OTG or host-only go to A_IDLE when ID is sensed.
86  */
87 #define is_peripheral_active(m)		(!(m)->is_host)
88 #define is_host_active(m)		((m)->is_host)
89 
90 #ifdef CONFIG_PROC_FS
91 #include <linux/fs.h>
92 #define MUSB_CONFIG_PROC_FS
93 #endif
94 
95 /****************************** PERIPHERAL ROLE *****************************/
96 
97 #ifndef __UBOOT__
98 #define	is_peripheral_capable()	(1)
99 #else
100 #ifdef CONFIG_MUSB_GADGET
101 #define	is_peripheral_capable()	(1)
102 #else
103 #define	is_peripheral_capable()	(0)
104 #endif
105 #endif
106 
107 extern irqreturn_t musb_g_ep0_irq(struct musb *);
108 extern void musb_g_tx(struct musb *, u8);
109 extern void musb_g_rx(struct musb *, u8);
110 extern void musb_g_reset(struct musb *);
111 extern void musb_g_suspend(struct musb *);
112 extern void musb_g_resume(struct musb *);
113 extern void musb_g_wakeup(struct musb *);
114 extern void musb_g_disconnect(struct musb *);
115 
116 /****************************** HOST ROLE ***********************************/
117 
118 #ifndef __UBOOT__
119 #define	is_host_capable()	(1)
120 #else
121 #ifdef CONFIG_MUSB_HOST
122 #define	is_host_capable()	(1)
123 #else
124 #define	is_host_capable()	(0)
125 #endif
126 #endif
127 
128 extern irqreturn_t musb_h_ep0_irq(struct musb *);
129 extern void musb_host_tx(struct musb *, u8);
130 extern void musb_host_rx(struct musb *, u8);
131 
132 /****************************** CONSTANTS ********************************/
133 
134 #ifndef MUSB_C_NUM_EPS
135 #define MUSB_C_NUM_EPS ((u8)16)
136 #endif
137 
138 #ifndef MUSB_MAX_END0_PACKET
139 #define MUSB_MAX_END0_PACKET ((u16)MUSB_EP0_FIFOSIZE)
140 #endif
141 
142 /* host side ep0 states */
143 enum musb_h_ep0_state {
144 	MUSB_EP0_IDLE,
145 	MUSB_EP0_START,			/* expect ack of setup */
146 	MUSB_EP0_IN,			/* expect IN DATA */
147 	MUSB_EP0_OUT,			/* expect ack of OUT DATA */
148 	MUSB_EP0_STATUS,		/* expect ack of STATUS */
149 } __attribute__ ((packed));
150 
151 /* peripheral side ep0 states */
152 enum musb_g_ep0_state {
153 	MUSB_EP0_STAGE_IDLE,		/* idle, waiting for SETUP */
154 	MUSB_EP0_STAGE_SETUP,		/* received SETUP */
155 	MUSB_EP0_STAGE_TX,		/* IN data */
156 	MUSB_EP0_STAGE_RX,		/* OUT data */
157 	MUSB_EP0_STAGE_STATUSIN,	/* (after OUT data) */
158 	MUSB_EP0_STAGE_STATUSOUT,	/* (after IN data) */
159 	MUSB_EP0_STAGE_ACKWAIT,		/* after zlp, before statusin */
160 } __attribute__ ((packed));
161 
162 /*
163  * OTG protocol constants.  See USB OTG 1.3 spec,
164  * sections 5.5 "Device Timings" and 6.6.5 "Timers".
165  */
166 #define OTG_TIME_A_WAIT_VRISE	100		/* msec (max) */
167 #define OTG_TIME_A_WAIT_BCON	1100		/* min 1 second */
168 #define OTG_TIME_A_AIDL_BDIS	200		/* min 200 msec */
169 #define OTG_TIME_B_ASE0_BRST	100		/* min 3.125 ms */
170 
171 
172 /*************************** REGISTER ACCESS ********************************/
173 
174 /* Endpoint registers (other than dynfifo setup) can be accessed either
175  * directly with the "flat" model, or after setting up an index register.
176  */
177 
178 #if defined(CONFIG_ARCH_DAVINCI) || defined(CONFIG_SOC_OMAP2430) \
179 		|| defined(CONFIG_SOC_OMAP3430) || defined(CONFIG_BLACKFIN) \
180 		|| defined(CONFIG_ARCH_OMAP4)
181 /* REVISIT indexed access seemed to
182  * misbehave (on DaVinci) for at least peripheral IN ...
183  */
184 #define	MUSB_FLAT_REG
185 #endif
186 
187 /* TUSB mapping: "flat" plus ep0 special cases */
188 #if defined(CONFIG_USB_MUSB_TUSB6010) || \
189 	defined(CONFIG_USB_MUSB_TUSB6010_MODULE)
190 #define musb_ep_select(_mbase, _epnum) \
191 	musb_writeb((_mbase), MUSB_INDEX, (_epnum))
192 #define	MUSB_EP_OFFSET			MUSB_TUSB_OFFSET
193 
194 /* "flat" mapping: each endpoint has its own i/o address */
195 #elif	defined(MUSB_FLAT_REG)
196 #define musb_ep_select(_mbase, _epnum)	(((void)(_mbase)), ((void)(_epnum)))
197 #define	MUSB_EP_OFFSET			MUSB_FLAT_OFFSET
198 
199 /* "indexed" mapping: INDEX register controls register bank select */
200 #else
201 #define musb_ep_select(_mbase, _epnum) \
202 	musb_writeb((_mbase), MUSB_INDEX, (_epnum))
203 #define	MUSB_EP_OFFSET			MUSB_INDEXED_OFFSET
204 #endif
205 
206 /****************************** FUNCTIONS ********************************/
207 
208 #define MUSB_HST_MODE(_musb)\
209 	{ (_musb)->is_host = true; }
210 #define MUSB_DEV_MODE(_musb) \
211 	{ (_musb)->is_host = false; }
212 
213 #define test_devctl_hst_mode(_x) \
214 	(musb_readb((_x)->mregs, MUSB_DEVCTL)&MUSB_DEVCTL_HM)
215 
216 #define MUSB_MODE(musb) ((musb)->is_host ? "Host" : "Peripheral")
217 
218 /******************************** TYPES *************************************/
219 
220 /**
221  * struct musb_platform_ops - Operations passed to musb_core by HW glue layer
222  * @init:	turns on clocks, sets up platform-specific registers, etc
223  * @exit:	undoes @init
224  * @set_mode:	forcefully changes operating mode
225  * @try_ilde:	tries to idle the IP
226  * @vbus_status: returns vbus status if possible
227  * @set_vbus:	forces vbus status
228  * @adjust_channel_params: pre check for standard dma channel_program func
229  */
230 struct musb_platform_ops {
231 	int	(*init)(struct musb *musb);
232 	int	(*exit)(struct musb *musb);
233 
234 #ifndef __UBOOT__
235 	void	(*enable)(struct musb *musb);
236 #else
237 	int	(*enable)(struct musb *musb);
238 #endif
239 	void	(*disable)(struct musb *musb);
240 
241 	int	(*set_mode)(struct musb *musb, u8 mode);
242 	void	(*try_idle)(struct musb *musb, unsigned long timeout);
243 
244 	int	(*vbus_status)(struct musb *musb);
245 	void	(*set_vbus)(struct musb *musb, int on);
246 
247 	int	(*adjust_channel_params)(struct dma_channel *channel,
248 				u16 packet_sz, u8 *mode,
249 				dma_addr_t *dma_addr, u32 *len);
250 };
251 
252 /*
253  * struct musb_hw_ep - endpoint hardware (bidirectional)
254  *
255  * Ordered slightly for better cacheline locality.
256  */
257 struct musb_hw_ep {
258 	struct musb		*musb;
259 	void __iomem		*fifo;
260 	void __iomem		*regs;
261 
262 #if defined(CONFIG_USB_MUSB_TUSB6010) || \
263 	defined(CONFIG_USB_MUSB_TUSB6010_MODULE)
264 	void __iomem		*conf;
265 #endif
266 
267 	/* index in musb->endpoints[]  */
268 	u8			epnum;
269 
270 	/* hardware configuration, possibly dynamic */
271 	bool			is_shared_fifo;
272 	bool			tx_double_buffered;
273 	bool			rx_double_buffered;
274 	u16			max_packet_sz_tx;
275 	u16			max_packet_sz_rx;
276 
277 	struct dma_channel	*tx_channel;
278 	struct dma_channel	*rx_channel;
279 
280 #if defined(CONFIG_USB_MUSB_TUSB6010) || \
281 	defined(CONFIG_USB_MUSB_TUSB6010_MODULE)
282 	/* TUSB has "asynchronous" and "synchronous" dma modes */
283 	dma_addr_t		fifo_async;
284 	dma_addr_t		fifo_sync;
285 	void __iomem		*fifo_sync_va;
286 #endif
287 
288 	void __iomem		*target_regs;
289 
290 	/* currently scheduled peripheral endpoint */
291 	struct musb_qh		*in_qh;
292 	struct musb_qh		*out_qh;
293 
294 	u8			rx_reinit;
295 	u8			tx_reinit;
296 
297 	/* peripheral side */
298 	struct musb_ep		ep_in;			/* TX */
299 	struct musb_ep		ep_out;			/* RX */
300 };
301 
302 static inline struct musb_request *next_in_request(struct musb_hw_ep *hw_ep)
303 {
304 	return next_request(&hw_ep->ep_in);
305 }
306 
307 static inline struct musb_request *next_out_request(struct musb_hw_ep *hw_ep)
308 {
309 	return next_request(&hw_ep->ep_out);
310 }
311 
312 struct musb_csr_regs {
313 	/* FIFO registers */
314 	u16 txmaxp, txcsr, rxmaxp, rxcsr;
315 	u16 rxfifoadd, txfifoadd;
316 	u8 txtype, txinterval, rxtype, rxinterval;
317 	u8 rxfifosz, txfifosz;
318 	u8 txfunaddr, txhubaddr, txhubport;
319 	u8 rxfunaddr, rxhubaddr, rxhubport;
320 };
321 
322 struct musb_context_registers {
323 
324 	u8 power;
325 	u16 intrtxe, intrrxe;
326 	u8 intrusbe;
327 	u16 frame;
328 	u8 index, testmode;
329 
330 	u8 devctl, busctl, misc;
331 	u32 otg_interfsel;
332 
333 	struct musb_csr_regs index_regs[MUSB_C_NUM_EPS];
334 };
335 
336 /*
337  * struct musb - Driver instance data.
338  */
339 struct musb {
340 	/* device lock */
341 	spinlock_t		lock;
342 
343 	const struct musb_platform_ops *ops;
344 	struct musb_context_registers context;
345 
346 	irqreturn_t		(*isr)(int, void *);
347 	struct work_struct	irq_work;
348 	u16			hwvers;
349 
350 /* this hub status bit is reserved by USB 2.0 and not seen by usbcore */
351 #define MUSB_PORT_STAT_RESUME	(1 << 31)
352 
353 	u32			port1_status;
354 
355 	unsigned long		rh_timer;
356 
357 	enum musb_h_ep0_state	ep0_stage;
358 
359 	/* bulk traffic normally dedicates endpoint hardware, and each
360 	 * direction has its own ring of host side endpoints.
361 	 * we try to progress the transfer at the head of each endpoint's
362 	 * queue until it completes or NAKs too much; then we try the next
363 	 * endpoint.
364 	 */
365 	struct musb_hw_ep	*bulk_ep;
366 
367 	struct list_head	control;	/* of musb_qh */
368 	struct list_head	in_bulk;	/* of musb_qh */
369 	struct list_head	out_bulk;	/* of musb_qh */
370 
371 	struct timer_list	otg_timer;
372 	struct notifier_block	nb;
373 
374 	struct dma_controller	*dma_controller;
375 
376 	struct device		*controller;
377 	void __iomem		*ctrl_base;
378 	void __iomem		*mregs;
379 
380 #if defined(CONFIG_USB_MUSB_TUSB6010) || \
381 	defined(CONFIG_USB_MUSB_TUSB6010_MODULE)
382 	dma_addr_t		async;
383 	dma_addr_t		sync;
384 	void __iomem		*sync_va;
385 #endif
386 
387 	/* passed down from chip/board specific irq handlers */
388 	u8			int_usb;
389 	u16			int_rx;
390 	u16			int_tx;
391 
392 	struct usb_phy		*xceiv;
393 
394 	int nIrq;
395 	unsigned		irq_wake:1;
396 
397 	struct musb_hw_ep	 endpoints[MUSB_C_NUM_EPS];
398 #define control_ep		endpoints
399 
400 #define VBUSERR_RETRY_COUNT	3
401 	u16			vbuserr_retry;
402 	u16 epmask;
403 	u8 nr_endpoints;
404 
405 	u8 board_mode;		/* enum musb_mode */
406 	int			(*board_set_power)(int state);
407 
408 	u8			min_power;	/* vbus for periph, in mA/2 */
409 
410 	bool			is_host;
411 
412 	int			a_wait_bcon;	/* VBUS timeout in msecs */
413 	unsigned long		idle_timeout;	/* Next timeout in jiffies */
414 
415 	/* active means connected and not suspended */
416 	unsigned		is_active:1;
417 
418 	unsigned is_multipoint:1;
419 	unsigned ignore_disconnect:1;	/* during bus resets */
420 
421 	unsigned		hb_iso_rx:1;	/* high bandwidth iso rx? */
422 	unsigned		hb_iso_tx:1;	/* high bandwidth iso tx? */
423 	unsigned		dyn_fifo:1;	/* dynamic FIFO supported? */
424 
425 	unsigned		bulk_split:1;
426 #define	can_bulk_split(musb,type) \
427 	(((type) == USB_ENDPOINT_XFER_BULK) && (musb)->bulk_split)
428 
429 	unsigned		bulk_combine:1;
430 #define	can_bulk_combine(musb,type) \
431 	(((type) == USB_ENDPOINT_XFER_BULK) && (musb)->bulk_combine)
432 
433 	/* is_suspended means USB B_PERIPHERAL suspend */
434 	unsigned		is_suspended:1;
435 
436 	/* may_wakeup means remote wakeup is enabled */
437 	unsigned		may_wakeup:1;
438 
439 	/* is_self_powered is reported in device status and the
440 	 * config descriptor.  is_bus_powered means B_PERIPHERAL
441 	 * draws some VBUS current; both can be true.
442 	 */
443 	unsigned		is_self_powered:1;
444 	unsigned		is_bus_powered:1;
445 
446 	unsigned		set_address:1;
447 	unsigned		test_mode:1;
448 	unsigned		softconnect:1;
449 
450 	u8			address;
451 	u8			test_mode_nr;
452 	u16			ackpend;		/* ep0 */
453 	enum musb_g_ep0_state	ep0_state;
454 	struct usb_gadget	g;			/* the gadget */
455 	struct usb_gadget_driver *gadget_driver;	/* its driver */
456 
457 	/*
458 	 * FIXME: Remove this flag.
459 	 *
460 	 * This is only added to allow Blackfin to work
461 	 * with current driver. For some unknown reason
462 	 * Blackfin doesn't work with double buffering
463 	 * and that's enabled by default.
464 	 *
465 	 * We added this flag to forcefully disable double
466 	 * buffering until we get it working.
467 	 */
468 	unsigned                double_buffer_not_ok:1;
469 
470 	struct musb_hdrc_config	*config;
471 
472 #ifdef MUSB_CONFIG_PROC_FS
473 	struct proc_dir_entry *proc_entry;
474 #endif
475 };
476 
477 static inline struct musb *gadget_to_musb(struct usb_gadget *g)
478 {
479 	return container_of(g, struct musb, g);
480 }
481 
482 #ifdef CONFIG_BLACKFIN
483 static inline int musb_read_fifosize(struct musb *musb,
484 		struct musb_hw_ep *hw_ep, u8 epnum)
485 {
486 	musb->nr_endpoints++;
487 	musb->epmask |= (1 << epnum);
488 
489 	if (epnum < 5) {
490 		hw_ep->max_packet_sz_tx = 128;
491 		hw_ep->max_packet_sz_rx = 128;
492 	} else {
493 		hw_ep->max_packet_sz_tx = 1024;
494 		hw_ep->max_packet_sz_rx = 1024;
495 	}
496 	hw_ep->is_shared_fifo = false;
497 
498 	return 0;
499 }
500 
501 static inline void musb_configure_ep0(struct musb *musb)
502 {
503 	musb->endpoints[0].max_packet_sz_tx = MUSB_EP0_FIFOSIZE;
504 	musb->endpoints[0].max_packet_sz_rx = MUSB_EP0_FIFOSIZE;
505 	musb->endpoints[0].is_shared_fifo = true;
506 }
507 
508 #else
509 
510 static inline int musb_read_fifosize(struct musb *musb,
511 		struct musb_hw_ep *hw_ep, u8 epnum)
512 {
513 	void *mbase = musb->mregs;
514 	u8 reg = 0;
515 
516 	/* read from core using indexed model */
517 	reg = musb_readb(mbase, MUSB_EP_OFFSET(epnum, MUSB_FIFOSIZE));
518 	/* 0's returned when no more endpoints */
519 	if (!reg)
520 		return -ENODEV;
521 
522 	musb->nr_endpoints++;
523 	musb->epmask |= (1 << epnum);
524 
525 	hw_ep->max_packet_sz_tx = 1 << (reg & 0x0f);
526 
527 	/* shared TX/RX FIFO? */
528 	if ((reg & 0xf0) == 0xf0) {
529 		hw_ep->max_packet_sz_rx = hw_ep->max_packet_sz_tx;
530 		hw_ep->is_shared_fifo = true;
531 		return 0;
532 	} else {
533 		hw_ep->max_packet_sz_rx = 1 << ((reg & 0xf0) >> 4);
534 		hw_ep->is_shared_fifo = false;
535 	}
536 
537 	return 0;
538 }
539 
540 static inline void musb_configure_ep0(struct musb *musb)
541 {
542 	musb->endpoints[0].max_packet_sz_tx = MUSB_EP0_FIFOSIZE;
543 	musb->endpoints[0].max_packet_sz_rx = MUSB_EP0_FIFOSIZE;
544 	musb->endpoints[0].is_shared_fifo = true;
545 }
546 #endif /* CONFIG_BLACKFIN */
547 
548 
549 /***************************** Glue it together *****************************/
550 
551 extern const char musb_driver_name[];
552 
553 #ifndef __UBOOT__
554 extern void musb_start(struct musb *musb);
555 #else
556 extern int musb_start(struct musb *musb);
557 #endif
558 extern void musb_stop(struct musb *musb);
559 
560 extern void musb_write_fifo(struct musb_hw_ep *ep, u16 len, const u8 *src);
561 extern void musb_read_fifo(struct musb_hw_ep *ep, u16 len, u8 *dst);
562 
563 extern void musb_load_testpacket(struct musb *);
564 
565 extern irqreturn_t musb_interrupt(struct musb *);
566 
567 extern void musb_hnp_stop(struct musb *musb);
568 
569 static inline void musb_platform_set_vbus(struct musb *musb, int is_on)
570 {
571 	if (musb->ops->set_vbus)
572 		musb->ops->set_vbus(musb, is_on);
573 }
574 
575 #ifndef __UBOOT__
576 static inline void musb_platform_enable(struct musb *musb)
577 {
578 	if (musb->ops->enable)
579 		musb->ops->enable(musb);
580 }
581 #else
582 static inline int musb_platform_enable(struct musb *musb)
583 {
584 	if (!musb->ops->enable)
585 		return 0;
586 
587 	return musb->ops->enable(musb);
588 }
589 #endif
590 
591 static inline void musb_platform_disable(struct musb *musb)
592 {
593 	if (musb->ops->disable)
594 		musb->ops->disable(musb);
595 }
596 
597 static inline int musb_platform_set_mode(struct musb *musb, u8 mode)
598 {
599 	if (!musb->ops->set_mode)
600 		return 0;
601 
602 	return musb->ops->set_mode(musb, mode);
603 }
604 
605 static inline void musb_platform_try_idle(struct musb *musb,
606 		unsigned long timeout)
607 {
608 	if (musb->ops->try_idle)
609 		musb->ops->try_idle(musb, timeout);
610 }
611 
612 static inline int musb_platform_get_vbus_status(struct musb *musb)
613 {
614 	if (!musb->ops->vbus_status)
615 		return 0;
616 
617 	return musb->ops->vbus_status(musb);
618 }
619 
620 static inline int musb_platform_init(struct musb *musb)
621 {
622 	if (!musb->ops->init)
623 		return -EINVAL;
624 
625 	return musb->ops->init(musb);
626 }
627 
628 static inline int musb_platform_exit(struct musb *musb)
629 {
630 	if (!musb->ops->exit)
631 		return -EINVAL;
632 
633 	return musb->ops->exit(musb);
634 }
635 
636 #ifdef __UBOOT__
637 struct musb *
638 musb_init_controller(struct musb_hdrc_platform_data *plat, struct device *dev,
639 			     void *ctrl);
640 #endif
641 #endif	/* __MUSB_CORE_H__ */
642