drivers/usb/musb-new/musb_core.h

   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         void    (*enable)(struct musb *musb);
 235         void    (*disable)(struct musb *musb);
 236
 237         int     (*set_mode)(struct musb *musb, u8 mode);
 238         void    (*try_idle)(struct musb *musb, unsigned long timeout);
 239
 240         int     (*vbus_status)(struct musb *musb);
 241         void    (*set_vbus)(struct musb *musb, int on);
 242
 243         int     (*adjust_channel_params)(struct dma_channel *channel,
 244                                 u16 packet_sz, u8 *mode,
 245                                 dma_addr_t *dma_addr, u32 *len);
 246 };
 247
 248 /*
 249  * struct musb_hw_ep - endpoint hardware (bidirectional)
 250  *
 251  * Ordered slightly for better cacheline locality.
 252  */
 253 struct musb_hw_ep {
 254         struct musb             *musb;
 255         void __iomem            *fifo;
 256         void __iomem            *regs;
 257
 258 #if defined(CONFIG_USB_MUSB_TUSB6010) || \
 259         defined(CONFIG_USB_MUSB_TUSB6010_MODULE)
 260         void __iomem            *conf;
 261 #endif
 262
 263         /* index in musb->endpoints[]  */
 264         u8                      epnum;
 265
 266         /* hardware configuration, possibly dynamic */
 267         bool                    is_shared_fifo;
 268         bool                    tx_double_buffered;
 269         bool                    rx_double_buffered;
 270         u16                     max_packet_sz_tx;
 271         u16                     max_packet_sz_rx;
 272
 273         struct dma_channel      *tx_channel;
 274         struct dma_channel      *rx_channel;
 275
 276 #if defined(CONFIG_USB_MUSB_TUSB6010) || \
 277         defined(CONFIG_USB_MUSB_TUSB6010_MODULE)
 278         /* TUSB has "asynchronous" and "synchronous" dma modes */
 279         dma_addr_t              fifo_async;
 280         dma_addr_t              fifo_sync;
 281         void __iomem            *fifo_sync_va;
 282 #endif
 283
 284         void __iomem            *target_regs;
 285
 286         /* currently scheduled peripheral endpoint */
 287         struct musb_qh          *in_qh;
 288         struct musb_qh          *out_qh;
 289
 290         u8                      rx_reinit;
 291         u8                      tx_reinit;
 292
 293         /* peripheral side */
 294         struct musb_ep          ep_in;                  /* TX */
 295         struct musb_ep          ep_out;                 /* RX */
 296 };
 297
 298 static inline struct musb_request *next_in_request(struct musb_hw_ep *hw_ep)
 299 {
 300         return next_request(&hw_ep->ep_in);
 301 }
 302
 303 static inline struct musb_request *next_out_request(struct musb_hw_ep *hw_ep)
 304 {
 305         return next_request(&hw_ep->ep_out);
 306 }
 307
 308 struct musb_csr_regs {
 309         /* FIFO registers */
 310         u16 txmaxp, txcsr, rxmaxp, rxcsr;
 311         u16 rxfifoadd, txfifoadd;
 312         u8 txtype, txinterval, rxtype, rxinterval;
 313         u8 rxfifosz, txfifosz;
 314         u8 txfunaddr, txhubaddr, txhubport;
 315         u8 rxfunaddr, rxhubaddr, rxhubport;
 316 };
 317
 318 struct musb_context_registers {
 319
 320         u8 power;
 321         u16 intrtxe, intrrxe;
 322         u8 intrusbe;
 323         u16 frame;
 324         u8 index, testmode;
 325
 326         u8 devctl, busctl, misc;
 327         u32 otg_interfsel;
 328
 329         struct musb_csr_regs index_regs[MUSB_C_NUM_EPS];
 330 };
 331
 332 /*
 333  * struct musb - Driver instance data.
 334  */
 335 struct musb {
 336         /* device lock */
 337         spinlock_t              lock;
 338
 339         const struct musb_platform_ops *ops;
 340         struct musb_context_registers context;
 341
 342         irqreturn_t             (*isr)(int, void *);
 343         struct work_struct      irq_work;
 344         u16                     hwvers;
 345
 346 /* this hub status bit is reserved by USB 2.0 and not seen by usbcore */
 347 #define MUSB_PORT_STAT_RESUME   (1 << 31)
 348
 349         u32                     port1_status;
 350
 351         unsigned long           rh_timer;
 352
 353         enum musb_h_ep0_state   ep0_stage;
 354
 355         /* bulk traffic normally dedicates endpoint hardware, and each
 356          * direction has its own ring of host side endpoints.
 357          * we try to progress the transfer at the head of each endpoint's
 358          * queue until it completes or NAKs too much; then we try the next
 359          * endpoint.
 360          */
 361         struct musb_hw_ep       *bulk_ep;
 362
 363         struct list_head        control;        /* of musb_qh */
 364         struct list_head        in_bulk;        /* of musb_qh */
 365         struct list_head        out_bulk;       /* of musb_qh */
 366
 367         struct timer_list       otg_timer;
 368         struct notifier_block   nb;
 369
 370         struct dma_controller   *dma_controller;
 371
 372         struct device           *controller;
 373         void __iomem            *ctrl_base;
 374         void __iomem            *mregs;
 375
 376 #if defined(CONFIG_USB_MUSB_TUSB6010) || \
 377         defined(CONFIG_USB_MUSB_TUSB6010_MODULE)
 378         dma_addr_t              async;
 379         dma_addr_t              sync;
 380         void __iomem            *sync_va;
 381 #endif
 382
 383         /* passed down from chip/board specific irq handlers */
 384         u8                      int_usb;
 385         u16                     int_rx;
 386         u16                     int_tx;
 387
 388         struct usb_phy          *xceiv;
 389
 390         int nIrq;
 391         unsigned                irq_wake:1;
 392
 393         struct musb_hw_ep        endpoints[MUSB_C_NUM_EPS];
 394 #define control_ep              endpoints
 395
 396 #define VBUSERR_RETRY_COUNT     3
 397         u16                     vbuserr_retry;
 398         u16 epmask;
 399         u8 nr_endpoints;
 400
 401         u8 board_mode;          /* enum musb_mode */
 402         int                     (*board_set_power)(int state);
 403
 404         u8                      min_power;      /* vbus for periph, in mA/2 */
 405
 406         bool                    is_host;
 407
 408         int                     a_wait_bcon;    /* VBUS timeout in msecs */
 409         unsigned long           idle_timeout;   /* Next timeout in jiffies */
 410
 411         /* active means connected and not suspended */
 412         unsigned                is_active:1;
 413
 414         unsigned is_multipoint:1;
 415         unsigned ignore_disconnect:1;   /* during bus resets */
 416
 417         unsigned                hb_iso_rx:1;    /* high bandwidth iso rx? */
 418         unsigned                hb_iso_tx:1;    /* high bandwidth iso tx? */
 419         unsigned                dyn_fifo:1;     /* dynamic FIFO supported? */
 420
 421         unsigned                bulk_split:1;
 422 #define can_bulk_split(musb,type) \
 423         (((type) == USB_ENDPOINT_XFER_BULK) && (musb)->bulk_split)
 424
 425         unsigned                bulk_combine:1;
 426 #define can_bulk_combine(musb,type) \
 427         (((type) == USB_ENDPOINT_XFER_BULK) && (musb)->bulk_combine)
 428
 429         /* is_suspended means USB B_PERIPHERAL suspend */
 430         unsigned                is_suspended:1;
 431
 432         /* may_wakeup means remote wakeup is enabled */
 433         unsigned                may_wakeup:1;
 434
 435         /* is_self_powered is reported in device status and the
 436          * config descriptor.  is_bus_powered means B_PERIPHERAL
 437          * draws some VBUS current; both can be true.
 438          */
 439         unsigned                is_self_powered:1;
 440         unsigned                is_bus_powered:1;
 441
 442         unsigned                set_address:1;
 443         unsigned                test_mode:1;
 444         unsigned                softconnect:1;
 445
 446         u8                      address;
 447         u8                      test_mode_nr;
 448         u16                     ackpend;                /* ep0 */
 449         enum musb_g_ep0_state   ep0_state;
 450         struct usb_gadget       g;                      /* the gadget */
 451         struct usb_gadget_driver *gadget_driver;        /* its driver */
 452
 453         /*
 454          * FIXME: Remove this flag.
 455          *
 456          * This is only added to allow Blackfin to work
 457          * with current driver. For some unknown reason
 458          * Blackfin doesn't work with double buffering
 459          * and that's enabled by default.
 460          *
 461          * We added this flag to forcefully disable double
 462          * buffering until we get it working.
 463          */
 464         unsigned                double_buffer_not_ok:1;
 465
 466         struct musb_hdrc_config *config;
 467
 468 #ifdef MUSB_CONFIG_PROC_FS
 469         struct proc_dir_entry *proc_entry;
 470 #endif
 471 };
 472
 473 static inline struct musb *gadget_to_musb(struct usb_gadget *g)
 474 {
 475         return container_of(g, struct musb, g);
 476 }
 477
 478 #ifdef CONFIG_BLACKFIN
 479 static inline int musb_read_fifosize(struct musb *musb,
 480                 struct musb_hw_ep *hw_ep, u8 epnum)
 481 {
 482         musb->nr_endpoints++;
 483         musb->epmask |= (1 << epnum);
 484
 485         if (epnum < 5) {
 486                 hw_ep->max_packet_sz_tx = 128;
 487                 hw_ep->max_packet_sz_rx = 128;
 488         } else {
 489                 hw_ep->max_packet_sz_tx = 1024;
 490                 hw_ep->max_packet_sz_rx = 1024;
 491         }
 492         hw_ep->is_shared_fifo = false;
 493
 494         return 0;
 495 }
 496
 497 static inline void musb_configure_ep0(struct musb *musb)
 498 {
 499         musb->endpoints[0].max_packet_sz_tx = MUSB_EP0_FIFOSIZE;
 500         musb->endpoints[0].max_packet_sz_rx = MUSB_EP0_FIFOSIZE;
 501         musb->endpoints[0].is_shared_fifo = true;
 502 }
 503
 504 #else
 505
 506 static inline int musb_read_fifosize(struct musb *musb,
 507                 struct musb_hw_ep *hw_ep, u8 epnum)
 508 {
 509         void *mbase = musb->mregs;
 510         u8 reg = 0;
 511
 512         /* read from core using indexed model */
 513         reg = musb_readb(mbase, MUSB_EP_OFFSET(epnum, MUSB_FIFOSIZE));
 514         /* 0's returned when no more endpoints */
 515         if (!reg)
 516                 return -ENODEV;
 517
 518         musb->nr_endpoints++;
 519         musb->epmask |= (1 << epnum);
 520
 521         hw_ep->max_packet_sz_tx = 1 << (reg & 0x0f);
 522
 523         /* shared TX/RX FIFO? */
 524         if ((reg & 0xf0) == 0xf0) {
 525                 hw_ep->max_packet_sz_rx = hw_ep->max_packet_sz_tx;
 526                 hw_ep->is_shared_fifo = true;
 527                 return 0;
 528         } else {
 529                 hw_ep->max_packet_sz_rx = 1 << ((reg & 0xf0) >> 4);
 530                 hw_ep->is_shared_fifo = false;
 531         }
 532
 533         return 0;
 534 }
 535
 536 static inline void musb_configure_ep0(struct musb *musb)
 537 {
 538         musb->endpoints[0].max_packet_sz_tx = MUSB_EP0_FIFOSIZE;
 539         musb->endpoints[0].max_packet_sz_rx = MUSB_EP0_FIFOSIZE;
 540         musb->endpoints[0].is_shared_fifo = true;
 541 }
 542 #endif /* CONFIG_BLACKFIN */
 543
 544
 545 /***************************** Glue it together *****************************/
 546
 547 extern const char musb_driver_name[];
 548
 549 extern void musb_start(struct musb *musb);
 550 extern void musb_stop(struct musb *musb);
 551
 552 extern void musb_write_fifo(struct musb_hw_ep *ep, u16 len, const u8 *src);
 553 extern void musb_read_fifo(struct musb_hw_ep *ep, u16 len, u8 *dst);
 554
 555 extern void musb_load_testpacket(struct musb *);
 556
 557 extern irqreturn_t musb_interrupt(struct musb *);
 558
 559 extern void musb_hnp_stop(struct musb *musb);
 560
 561 static inline void musb_platform_set_vbus(struct musb *musb, int is_on)
 562 {
 563         if (musb->ops->set_vbus)
 564                 musb->ops->set_vbus(musb, is_on);
 565 }
 566
 567 static inline void musb_platform_enable(struct musb *musb)
 568 {
 569         if (musb->ops->enable)
 570                 musb->ops->enable(musb);
 571 }
 572
 573 static inline void musb_platform_disable(struct musb *musb)
 574 {
 575         if (musb->ops->disable)
 576                 musb->ops->disable(musb);
 577 }
 578
 579 static inline int musb_platform_set_mode(struct musb *musb, u8 mode)
 580 {
 581         if (!musb->ops->set_mode)
 582                 return 0;
 583
 584         return musb->ops->set_mode(musb, mode);
 585 }
 586
 587 static inline void musb_platform_try_idle(struct musb *musb,
 588                 unsigned long timeout)
 589 {
 590         if (musb->ops->try_idle)
 591                 musb->ops->try_idle(musb, timeout);
 592 }
 593
 594 static inline int musb_platform_get_vbus_status(struct musb *musb)
 595 {
 596         if (!musb->ops->vbus_status)
 597                 return 0;
 598
 599         return musb->ops->vbus_status(musb);
 600 }
 601
 602 static inline int musb_platform_init(struct musb *musb)
 603 {
 604         if (!musb->ops->init)
 605                 return -EINVAL;
 606
 607         return musb->ops->init(musb);
 608 }
 609
 610 static inline int musb_platform_exit(struct musb *musb)
 611 {
 612         if (!musb->ops->exit)
 613                 return -EINVAL;
 614
 615         return musb->ops->exit(musb);
 616 }
 617
 618 #ifdef __UBOOT__
 619 struct musb *
 620 musb_init_controller(struct musb_hdrc_platform_data *plat, struct device *dev,
 621                              void *ctrl);
 622 #endif
 623 #endif  /* __MUSB_CORE_H__ */