drivers/usb/musb/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 #include <linux/slab.h>
  39 #include <linux/list.h>
  40 #include <linux/interrupt.h>
  41 #include <linux/errno.h>
  42 #include <linux/timer.h>
  43 #include <linux/device.h>
  44 #include <linux/usb/ch9.h>
  45 #include <linux/usb/gadget.h>
  46 #include <linux/usb.h>
  47 #include <linux/usb/otg.h>
  48 #include <linux/usb/musb.h>
  49 #include <linux/phy/phy.h>
  50 #include <linux/workqueue.h>
  51
  52 struct musb;
  53 struct musb_hw_ep;
  54 struct musb_ep;
  55
  56 /* Helper defines for struct musb->hwvers */
  57 #define MUSB_HWVERS_MAJOR(x)    ((x >> 10) & 0x1f)
  58 #define MUSB_HWVERS_MINOR(x)    (x & 0x3ff)
  59 #define MUSB_HWVERS_RC          0x8000
  60 #define MUSB_HWVERS_1300        0x52C
  61 #define MUSB_HWVERS_1400        0x590
  62 #define MUSB_HWVERS_1800        0x720
  63 #define MUSB_HWVERS_1900        0x784
  64 #define MUSB_HWVERS_2000        0x800
  65
  66 #include "musb_debug.h"
  67 #include "musb_dma.h"
  68
  69 #include "musb_io.h"
  70
  71 #include "musb_gadget.h"
  72 #include <linux/usb/hcd.h>
  73 #include "musb_host.h"
  74
  75 /* NOTE:  otg and peripheral-only state machines start at B_IDLE.
  76  * OTG or host-only go to A_IDLE when ID is sensed.
  77  */
  78 #define is_peripheral_active(m)         (!(m)->is_host)
  79 #define is_host_active(m)               ((m)->is_host)
  80
  81 enum {
  82         MUSB_PORT_MODE_HOST     = 1,
  83         MUSB_PORT_MODE_GADGET,
  84         MUSB_PORT_MODE_DUAL_ROLE,
  85 };
  86
  87 /****************************** CONSTANTS ********************************/
  88
  89 #ifndef MUSB_C_NUM_EPS
  90 #define MUSB_C_NUM_EPS ((u8)16)
  91 #endif
  92
  93 #ifndef MUSB_MAX_END0_PACKET
  94 #define MUSB_MAX_END0_PACKET ((u16)MUSB_EP0_FIFOSIZE)
  95 #endif
  96
  97 /* host side ep0 states */
  98 enum musb_h_ep0_state {
  99         MUSB_EP0_IDLE,
 100         MUSB_EP0_START,                 /* expect ack of setup */
 101         MUSB_EP0_IN,                    /* expect IN DATA */
 102         MUSB_EP0_OUT,                   /* expect ack of OUT DATA */
 103         MUSB_EP0_STATUS,                /* expect ack of STATUS */
 104 } __attribute__ ((packed));
 105
 106 /* peripheral side ep0 states */
 107 enum musb_g_ep0_state {
 108         MUSB_EP0_STAGE_IDLE,            /* idle, waiting for SETUP */
 109         MUSB_EP0_STAGE_SETUP,           /* received SETUP */
 110         MUSB_EP0_STAGE_TX,              /* IN data */
 111         MUSB_EP0_STAGE_RX,              /* OUT data */
 112         MUSB_EP0_STAGE_STATUSIN,        /* (after OUT data) */
 113         MUSB_EP0_STAGE_STATUSOUT,       /* (after IN data) */
 114         MUSB_EP0_STAGE_ACKWAIT,         /* after zlp, before statusin */
 115 } __attribute__ ((packed));
 116
 117 /*
 118  * OTG protocol constants.  See USB OTG 1.3 spec,
 119  * sections 5.5 "Device Timings" and 6.6.5 "Timers".
 120  */
 121 #define OTG_TIME_A_WAIT_VRISE   100             /* msec (max) */
 122 #define OTG_TIME_A_WAIT_BCON    1100            /* min 1 second */
 123 #define OTG_TIME_A_AIDL_BDIS    200             /* min 200 msec */
 124 #define OTG_TIME_B_ASE0_BRST    100             /* min 3.125 ms */
 125
 126 /****************************** FUNCTIONS ********************************/
 127
 128 #define MUSB_HST_MODE(_musb)\
 129         { (_musb)->is_host = true; }
 130 #define MUSB_DEV_MODE(_musb) \
 131         { (_musb)->is_host = false; }
 132
 133 #define test_devctl_hst_mode(_x) \
 134         (musb_readb((_x)->mregs, MUSB_DEVCTL)&MUSB_DEVCTL_HM)
 135
 136 #define MUSB_MODE(musb) ((musb)->is_host ? "Host" : "Peripheral")
 137
 138 /******************************** TYPES *************************************/
 139
 140 struct musb_io;
 141
 142 /**
 143  * struct musb_platform_ops - Operations passed to musb_core by HW glue layer
 144  * @quirks:     flags for platform specific quirks
 145  * @enable:     enable device
 146  * @disable:    disable device
 147  * @ep_offset:  returns the end point offset
 148  * @ep_select:  selects the specified end point
 149  * @fifo_mode:  sets the fifo mode
 150  * @fifo_offset: returns the fifo offset
 151  * @readb:      read 8 bits
 152  * @writeb:     write 8 bits
 153  * @readw:      read 16 bits
 154  * @writew:     write 16 bits
 155  * @readl:      read 32 bits
 156  * @writel:     write 32 bits
 157  * @read_fifo:  reads the fifo
 158  * @write_fifo: writes to fifo
 159  * @dma_init:   platform specific dma init function
 160  * @dma_exit:   platform specific dma exit function
 161  * @init:       turns on clocks, sets up platform-specific registers, etc
 162  * @exit:       undoes @init
 163  * @set_mode:   forcefully changes operating mode
 164  * @try_idle:   tries to idle the IP
 165  * @recover:    platform-specific babble recovery
 166  * @vbus_status: returns vbus status if possible
 167  * @set_vbus:   forces vbus status
 168  * @adjust_channel_params: pre check for standard dma channel_program func
 169  * @pre_root_reset_end: called before the root usb port reset flag gets cleared
 170  * @post_root_reset_end: called after the root usb port reset flag gets cleared
 171  * @phy_callback: optional callback function for the phy to call
 172  */
 173 struct musb_platform_ops {
 174
 175 #define MUSB_DMA_UX500          BIT(6)
 176 #define MUSB_DMA_CPPI41         BIT(5)
 177 #define MUSB_DMA_CPPI           BIT(4)
 178 #define MUSB_DMA_TUSB_OMAP      BIT(3)
 179 #define MUSB_DMA_INVENTRA       BIT(2)
 180 #define MUSB_IN_TUSB            BIT(1)
 181 #define MUSB_INDEXED_EP         BIT(0)
 182         u32     quirks;
 183
 184         int     (*init)(struct musb *musb);
 185         int     (*exit)(struct musb *musb);
 186
 187         void    (*enable)(struct musb *musb);
 188         void    (*disable)(struct musb *musb);
 189
 190         u32     (*ep_offset)(u8 epnum, u16 offset);
 191         void    (*ep_select)(void __iomem *mbase, u8 epnum);
 192         u16     fifo_mode;
 193         u32     (*fifo_offset)(u8 epnum);
 194         u32     (*busctl_offset)(u8 epnum, u16 offset);
 195         u8      (*readb)(const void __iomem *addr, unsigned offset);
 196         void    (*writeb)(void __iomem *addr, unsigned offset, u8 data);
 197         u16     (*readw)(const void __iomem *addr, unsigned offset);
 198         void    (*writew)(void __iomem *addr, unsigned offset, u16 data);
 199         u32     (*readl)(const void __iomem *addr, unsigned offset);
 200         void    (*writel)(void __iomem *addr, unsigned offset, u32 data);
 201         void    (*read_fifo)(struct musb_hw_ep *hw_ep, u16 len, u8 *buf);
 202         void    (*write_fifo)(struct musb_hw_ep *hw_ep, u16 len, const u8 *buf);
 203         struct dma_controller *
 204                 (*dma_init) (struct musb *musb, void __iomem *base);
 205         void    (*dma_exit)(struct dma_controller *c);
 206         int     (*set_mode)(struct musb *musb, u8 mode);
 207         void    (*try_idle)(struct musb *musb, unsigned long timeout);
 208         int     (*recover)(struct musb *musb);
 209
 210         int     (*vbus_status)(struct musb *musb);
 211         void    (*set_vbus)(struct musb *musb, int on);
 212
 213         int     (*adjust_channel_params)(struct dma_channel *channel,
 214                                 u16 packet_sz, u8 *mode,
 215                                 dma_addr_t *dma_addr, u32 *len);
 216         void    (*pre_root_reset_end)(struct musb *musb);
 217         void    (*post_root_reset_end)(struct musb *musb);
 218         int     (*phy_callback)(enum musb_vbus_id_status status);
 219 };
 220
 221 /*
 222  * struct musb_hw_ep - endpoint hardware (bidirectional)
 223  *
 224  * Ordered slightly for better cacheline locality.
 225  */
 226 struct musb_hw_ep {
 227         struct musb             *musb;
 228         void __iomem            *fifo;
 229         void __iomem            *regs;
 230
 231 #if IS_ENABLED(CONFIG_USB_MUSB_TUSB6010)
 232         void __iomem            *conf;
 233 #endif
 234
 235         /* index in musb->endpoints[]  */
 236         u8                      epnum;
 237
 238         /* hardware configuration, possibly dynamic */
 239         bool                    is_shared_fifo;
 240         bool                    tx_double_buffered;
 241         bool                    rx_double_buffered;
 242         u16                     max_packet_sz_tx;
 243         u16                     max_packet_sz_rx;
 244
 245         struct dma_channel      *tx_channel;
 246         struct dma_channel      *rx_channel;
 247
 248 #if IS_ENABLED(CONFIG_USB_MUSB_TUSB6010)
 249         /* TUSB has "asynchronous" and "synchronous" dma modes */
 250         dma_addr_t              fifo_async;
 251         dma_addr_t              fifo_sync;
 252         void __iomem            *fifo_sync_va;
 253 #endif
 254
 255         /* currently scheduled peripheral endpoint */
 256         struct musb_qh          *in_qh;
 257         struct musb_qh          *out_qh;
 258
 259         u8                      rx_reinit;
 260         u8                      tx_reinit;
 261
 262         /* peripheral side */
 263         struct musb_ep          ep_in;                  /* TX */
 264         struct musb_ep          ep_out;                 /* RX */
 265 };
 266
 267 static inline struct musb_request *next_in_request(struct musb_hw_ep *hw_ep)
 268 {
 269         return next_request(&hw_ep->ep_in);
 270 }
 271
 272 static inline struct musb_request *next_out_request(struct musb_hw_ep *hw_ep)
 273 {
 274         return next_request(&hw_ep->ep_out);
 275 }
 276
 277 struct musb_csr_regs {
 278         /* FIFO registers */
 279         u16 txmaxp, txcsr, rxmaxp, rxcsr;
 280         u16 rxfifoadd, txfifoadd;
 281         u8 txtype, txinterval, rxtype, rxinterval;
 282         u8 rxfifosz, txfifosz;
 283         u8 txfunaddr, txhubaddr, txhubport;
 284         u8 rxfunaddr, rxhubaddr, rxhubport;
 285 };
 286
 287 struct musb_context_registers {
 288
 289         u8 power;
 290         u8 intrusbe;
 291         u16 frame;
 292         u8 index, testmode;
 293
 294         u8 devctl, busctl, misc;
 295         u32 otg_interfsel;
 296
 297         struct musb_csr_regs index_regs[MUSB_C_NUM_EPS];
 298 };
 299
 300 /*
 301  * struct musb - Driver instance data.
 302  */
 303 struct musb {
 304         /* device lock */
 305         spinlock_t              lock;
 306
 307         struct musb_io          io;
 308         const struct musb_platform_ops *ops;
 309         struct musb_context_registers context;
 310
 311         irqreturn_t             (*isr)(int, void *);
 312         struct work_struct      irq_work;
 313         struct delayed_work     deassert_reset_work;
 314         struct delayed_work     finish_resume_work;
 315         struct delayed_work     gadget_work;
 316         u16                     hwvers;
 317
 318         u16                     intrrxe;
 319         u16                     intrtxe;
 320 /* this hub status bit is reserved by USB 2.0 and not seen by usbcore */
 321 #define MUSB_PORT_STAT_RESUME   (1 << 31)
 322
 323         u32                     port1_status;
 324
 325         unsigned long           rh_timer;
 326
 327         enum musb_h_ep0_state   ep0_stage;
 328
 329         /* bulk traffic normally dedicates endpoint hardware, and each
 330          * direction has its own ring of host side endpoints.
 331          * we try to progress the transfer at the head of each endpoint's
 332          * queue until it completes or NAKs too much; then we try the next
 333          * endpoint.
 334          */
 335         struct musb_hw_ep       *bulk_ep;
 336
 337         struct list_head        control;        /* of musb_qh */
 338         struct list_head        in_bulk;        /* of musb_qh */
 339         struct list_head        out_bulk;       /* of musb_qh */
 340
 341         struct timer_list       otg_timer;
 342         struct notifier_block   nb;
 343
 344         struct dma_controller   *dma_controller;
 345
 346         struct device           *controller;
 347         void __iomem            *ctrl_base;
 348         void __iomem            *mregs;
 349
 350 #if IS_ENABLED(CONFIG_USB_MUSB_TUSB6010)
 351         dma_addr_t              async;
 352         dma_addr_t              sync;
 353         void __iomem            *sync_va;
 354         u8                      tusb_revision;
 355 #endif
 356
 357         /* passed down from chip/board specific irq handlers */
 358         u8                      int_usb;
 359         u16                     int_rx;
 360         u16                     int_tx;
 361
 362         struct usb_phy          *xceiv;
 363         struct phy              *phy;
 364
 365         int nIrq;
 366         unsigned                irq_wake:1;
 367
 368         struct musb_hw_ep        endpoints[MUSB_C_NUM_EPS];
 369 #define control_ep              endpoints
 370
 371 #define VBUSERR_RETRY_COUNT     3
 372         u16                     vbuserr_retry;
 373         u16 epmask;
 374         u8 nr_endpoints;
 375
 376         int                     (*board_set_power)(int state);
 377
 378         u8                      min_power;      /* vbus for periph, in mA/2 */
 379
 380         int                     port_mode;      /* MUSB_PORT_MODE_* */
 381         bool                    session;
 382         bool                    quirk_invalid_vbus;
 383         bool                    is_host;
 384
 385         int                     a_wait_bcon;    /* VBUS timeout in msecs */
 386         unsigned long           idle_timeout;   /* Next timeout in jiffies */
 387
 388         /* active means connected and not suspended */
 389         unsigned                is_active:1;
 390
 391         unsigned is_multipoint:1;
 392
 393         unsigned                hb_iso_rx:1;    /* high bandwidth iso rx? */
 394         unsigned                hb_iso_tx:1;    /* high bandwidth iso tx? */
 395         unsigned                dyn_fifo:1;     /* dynamic FIFO supported? */
 396
 397         unsigned                bulk_split:1;
 398 #define can_bulk_split(musb,type) \
 399         (((type) == USB_ENDPOINT_XFER_BULK) && (musb)->bulk_split)
 400
 401         unsigned                bulk_combine:1;
 402 #define can_bulk_combine(musb,type) \
 403         (((type) == USB_ENDPOINT_XFER_BULK) && (musb)->bulk_combine)
 404
 405         /* is_suspended means USB B_PERIPHERAL suspend */
 406         unsigned                is_suspended:1;
 407         unsigned                need_finish_resume :1;
 408
 409         /* may_wakeup means remote wakeup is enabled */
 410         unsigned                may_wakeup:1;
 411
 412         /* is_self_powered is reported in device status and the
 413          * config descriptor.  is_bus_powered means B_PERIPHERAL
 414          * draws some VBUS current; both can be true.
 415          */
 416         unsigned                is_self_powered:1;
 417         unsigned                is_bus_powered:1;
 418
 419         unsigned                set_address:1;
 420         unsigned                test_mode:1;
 421         unsigned                softconnect:1;
 422
 423         u8                      address;
 424         u8                      test_mode_nr;
 425         u16                     ackpend;                /* ep0 */
 426         enum musb_g_ep0_state   ep0_state;
 427         struct usb_gadget       g;                      /* the gadget */
 428         struct usb_gadget_driver *gadget_driver;        /* its driver */
 429         struct usb_hcd          *hcd;                   /* the usb hcd */
 430
 431         /*
 432          * FIXME: Remove this flag.
 433          *
 434          * This is only added to allow Blackfin to work
 435          * with current driver. For some unknown reason
 436          * Blackfin doesn't work with double buffering
 437          * and that's enabled by default.
 438          *
 439          * We added this flag to forcefully disable double
 440          * buffering until we get it working.
 441          */
 442         unsigned                double_buffer_not_ok:1;
 443
 444         const struct musb_hdrc_config *config;
 445
 446         int                     xceiv_old_state;
 447 #ifdef CONFIG_DEBUG_FS
 448         struct dentry           *debugfs_root;
 449 #endif
 450 };
 451
 452 /* This must be included after struct musb is defined */
 453 #include "musb_regs.h"
 454
 455 static inline struct musb *gadget_to_musb(struct usb_gadget *g)
 456 {
 457         return container_of(g, struct musb, g);
 458 }
 459
 460 #ifdef CONFIG_BLACKFIN
 461 static inline int musb_read_fifosize(struct musb *musb,
 462                 struct musb_hw_ep *hw_ep, u8 epnum)
 463 {
 464         musb->nr_endpoints++;
 465         musb->epmask |= (1 << epnum);
 466
 467         if (epnum < 5) {
 468                 hw_ep->max_packet_sz_tx = 128;
 469                 hw_ep->max_packet_sz_rx = 128;
 470         } else {
 471                 hw_ep->max_packet_sz_tx = 1024;
 472                 hw_ep->max_packet_sz_rx = 1024;
 473         }
 474         hw_ep->is_shared_fifo = false;
 475
 476         return 0;
 477 }
 478
 479 static inline void musb_configure_ep0(struct musb *musb)
 480 {
 481         musb->endpoints[0].max_packet_sz_tx = MUSB_EP0_FIFOSIZE;
 482         musb->endpoints[0].max_packet_sz_rx = MUSB_EP0_FIFOSIZE;
 483         musb->endpoints[0].is_shared_fifo = true;
 484 }
 485
 486 #else
 487
 488 static inline int musb_read_fifosize(struct musb *musb,
 489                 struct musb_hw_ep *hw_ep, u8 epnum)
 490 {
 491         void __iomem *mbase = musb->mregs;
 492         u8 reg = 0;
 493
 494         /* read from core using indexed model */
 495         reg = musb_readb(mbase, musb->io.ep_offset(epnum, MUSB_FIFOSIZE));
 496         /* 0's returned when no more endpoints */
 497         if (!reg)
 498                 return -ENODEV;
 499
 500         musb->nr_endpoints++;
 501         musb->epmask |= (1 << epnum);
 502
 503         hw_ep->max_packet_sz_tx = 1 << (reg & 0x0f);
 504
 505         /* shared TX/RX FIFO? */
 506         if ((reg & 0xf0) == 0xf0) {
 507                 hw_ep->max_packet_sz_rx = hw_ep->max_packet_sz_tx;
 508                 hw_ep->is_shared_fifo = true;
 509                 return 0;
 510         } else {
 511                 hw_ep->max_packet_sz_rx = 1 << ((reg & 0xf0) >> 4);
 512                 hw_ep->is_shared_fifo = false;
 513         }
 514
 515         return 0;
 516 }
 517
 518 static inline void musb_configure_ep0(struct musb *musb)
 519 {
 520         musb->endpoints[0].max_packet_sz_tx = MUSB_EP0_FIFOSIZE;
 521         musb->endpoints[0].max_packet_sz_rx = MUSB_EP0_FIFOSIZE;
 522         musb->endpoints[0].is_shared_fifo = true;
 523 }
 524 #endif /* CONFIG_BLACKFIN */
 525
 526
 527 /***************************** Glue it together *****************************/
 528
 529 extern const char musb_driver_name[];
 530
 531 extern void musb_stop(struct musb *musb);
 532 extern void musb_start(struct musb *musb);
 533
 534 extern void musb_write_fifo(struct musb_hw_ep *ep, u16 len, const u8 *src);
 535 extern void musb_read_fifo(struct musb_hw_ep *ep, u16 len, u8 *dst);
 536
 537 extern void musb_load_testpacket(struct musb *);
 538
 539 extern irqreturn_t musb_interrupt(struct musb *);
 540
 541 extern void musb_hnp_stop(struct musb *musb);
 542
 543 static inline void musb_platform_set_vbus(struct musb *musb, int is_on)
 544 {
 545         if (musb->ops->set_vbus)
 546                 musb->ops->set_vbus(musb, is_on);
 547 }
 548
 549 static inline void musb_platform_enable(struct musb *musb)
 550 {
 551         if (musb->ops->enable)
 552                 musb->ops->enable(musb);
 553 }
 554
 555 static inline void musb_platform_disable(struct musb *musb)
 556 {
 557         if (musb->ops->disable)
 558                 musb->ops->disable(musb);
 559 }
 560
 561 static inline int musb_platform_set_mode(struct musb *musb, u8 mode)
 562 {
 563         if (!musb->ops->set_mode)
 564                 return 0;
 565
 566         return musb->ops->set_mode(musb, mode);
 567 }
 568
 569 static inline void musb_platform_try_idle(struct musb *musb,
 570                 unsigned long timeout)
 571 {
 572         if (musb->ops->try_idle)
 573                 musb->ops->try_idle(musb, timeout);
 574 }
 575
 576 static inline int  musb_platform_recover(struct musb *musb)
 577 {
 578         if (!musb->ops->recover)
 579                 return 0;
 580
 581         return musb->ops->recover(musb);
 582 }
 583
 584 static inline int musb_platform_get_vbus_status(struct musb *musb)
 585 {
 586         if (!musb->ops->vbus_status)
 587                 return -EINVAL;
 588
 589         return musb->ops->vbus_status(musb);
 590 }
 591
 592 static inline int musb_platform_init(struct musb *musb)
 593 {
 594         if (!musb->ops->init)
 595                 return -EINVAL;
 596
 597         return musb->ops->init(musb);
 598 }
 599
 600 static inline int musb_platform_exit(struct musb *musb)
 601 {
 602         if (!musb->ops->exit)
 603                 return -EINVAL;
 604
 605         return musb->ops->exit(musb);
 606 }
 607
 608 static inline void musb_platform_pre_root_reset_end(struct musb *musb)
 609 {
 610         if (musb->ops->pre_root_reset_end)
 611                 musb->ops->pre_root_reset_end(musb);
 612 }
 613
 614 static inline void musb_platform_post_root_reset_end(struct musb *musb)
 615 {
 616         if (musb->ops->post_root_reset_end)
 617                 musb->ops->post_root_reset_end(musb);
 618 }
 619
 620 #endif  /* __MUSB_CORE_H__ */