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/clk.h>
  44 #include <linux/device.h>
  45 #include <linux/usb/ch9.h>
  46 #include <linux/usb/gadget.h>
  47 #include <linux/usb.h>
  48 #include <linux/usb/otg.h>
  49 #include <linux/usb/musb.h>
  50
  51 struct musb;
  52 struct musb_hw_ep;
  53 struct musb_ep;
  54
  55 /* Helper defines for struct musb->hwvers */
  56 #define MUSB_HWVERS_MAJOR(x)    ((x >> 10) & 0x1f)
  57 #define MUSB_HWVERS_MINOR(x)    (x & 0x3ff)
  58 #define MUSB_HWVERS_RC          0x8000
  59 #define MUSB_HWVERS_1300        0x52C
  60 #define MUSB_HWVERS_1400        0x590
  61 #define MUSB_HWVERS_1800        0x720
  62 #define MUSB_HWVERS_1900        0x784
  63 #define MUSB_HWVERS_2000        0x800
  64
  65 #include "musb_debug.h"
  66 #include "musb_dma.h"
  67
  68 #include "musb_io.h"
  69 #include "musb_regs.h"
  70
  71 #include "musb_gadget.h"
  72 #include <linux/usb/hcd.h>
  73 #include "musb_host.h"
  74
  75
  76
  77 #ifdef CONFIG_USB_MUSB_OTG
  78
  79 #define is_peripheral_enabled(musb)     ((musb)->board_mode != MUSB_HOST)
  80 #define is_host_enabled(musb)           ((musb)->board_mode != MUSB_PERIPHERAL)
  81 #define is_otg_enabled(musb)            ((musb)->board_mode == MUSB_OTG)
  82
  83 /* NOTE:  otg and peripheral-only state machines start at B_IDLE.
  84  * OTG or host-only go to A_IDLE when ID is sensed.
  85  */
  86 #define is_peripheral_active(m)         (!(m)->is_host)
  87 #define is_host_active(m)               ((m)->is_host)
  88
  89 #else
  90 #define is_peripheral_enabled(musb)     is_peripheral_capable()
  91 #define is_host_enabled(musb)           is_host_capable()
  92 #define is_otg_enabled(musb)            0
  93
  94 #define is_peripheral_active(musb)      is_peripheral_capable()
  95 #define is_host_active(musb)            is_host_capable()
  96 #endif
  97
  98 #if defined(CONFIG_USB_MUSB_OTG) || defined(CONFIG_USB_MUSB_PERIPHERAL)
  99 /* for some reason, the "select USB_GADGET_MUSB_HDRC" doesn't always
 100  * override that choice selection (often USB_GADGET_DUMMY_HCD).
 101  */
 102 #ifndef CONFIG_USB_GADGET_MUSB_HDRC
 103 #error bogus Kconfig output ... select CONFIG_USB_GADGET_MUSB_HDRC
 104 #endif
 105 #endif  /* need MUSB gadget selection */
 106
 107 #ifndef CONFIG_HAVE_CLK
 108 /* Dummy stub for clk framework */
 109 #define clk_get(dev, id)        NULL
 110 #define clk_put(clock)          do {} while (0)
 111 #define clk_enable(clock)       do {} while (0)
 112 #define clk_disable(clock)      do {} while (0)
 113 #endif
 114
 115 #ifdef CONFIG_PROC_FS
 116 #include <linux/fs.h>
 117 #define MUSB_CONFIG_PROC_FS
 118 #endif
 119
 120 /****************************** PERIPHERAL ROLE *****************************/
 121
 122 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
 123
 124 #define is_peripheral_capable() (1)
 125
 126 extern irqreturn_t musb_g_ep0_irq(struct musb *);
 127 extern void musb_g_tx(struct musb *, u8);
 128 extern void musb_g_rx(struct musb *, u8);
 129 extern void musb_g_reset(struct musb *);
 130 extern void musb_g_suspend(struct musb *);
 131 extern void musb_g_resume(struct musb *);
 132 extern void musb_g_wakeup(struct musb *);
 133 extern void musb_g_disconnect(struct musb *);
 134
 135 #else
 136
 137 #define is_peripheral_capable() (0)
 138
 139 static inline irqreturn_t musb_g_ep0_irq(struct musb *m) { return IRQ_NONE; }
 140 static inline void musb_g_reset(struct musb *m) {}
 141 static inline void musb_g_suspend(struct musb *m) {}
 142 static inline void musb_g_resume(struct musb *m) {}
 143 static inline void musb_g_wakeup(struct musb *m) {}
 144 static inline void musb_g_disconnect(struct musb *m) {}
 145
 146 #endif
 147
 148 /****************************** HOST ROLE ***********************************/
 149
 150 #ifdef CONFIG_USB_MUSB_HDRC_HCD
 151
 152 #define is_host_capable()       (1)
 153
 154 extern irqreturn_t musb_h_ep0_irq(struct musb *);
 155 extern void musb_host_tx(struct musb *, u8);
 156 extern void musb_host_rx(struct musb *, u8);
 157
 158 #else
 159
 160 #define is_host_capable()       (0)
 161
 162 static inline irqreturn_t musb_h_ep0_irq(struct musb *m) { return IRQ_NONE; }
 163 static inline void musb_host_tx(struct musb *m, u8 e) {}
 164 static inline void musb_host_rx(struct musb *m, u8 e) {}
 165
 166 #endif
 167
 168
 169 /****************************** CONSTANTS ********************************/
 170
 171 #ifndef MUSB_C_NUM_EPS
 172 #define MUSB_C_NUM_EPS ((u8)16)
 173 #endif
 174
 175 #ifndef MUSB_MAX_END0_PACKET
 176 #define MUSB_MAX_END0_PACKET ((u16)MUSB_EP0_FIFOSIZE)
 177 #endif
 178
 179 /* host side ep0 states */
 180 enum musb_h_ep0_state {
 181         MUSB_EP0_IDLE,
 182         MUSB_EP0_START,                 /* expect ack of setup */
 183         MUSB_EP0_IN,                    /* expect IN DATA */
 184         MUSB_EP0_OUT,                   /* expect ack of OUT DATA */
 185         MUSB_EP0_STATUS,                /* expect ack of STATUS */
 186 } __attribute__ ((packed));
 187
 188 /* peripheral side ep0 states */
 189 enum musb_g_ep0_state {
 190         MUSB_EP0_STAGE_IDLE,            /* idle, waiting for SETUP */
 191         MUSB_EP0_STAGE_SETUP,           /* received SETUP */
 192         MUSB_EP0_STAGE_TX,              /* IN data */
 193         MUSB_EP0_STAGE_RX,              /* OUT data */
 194         MUSB_EP0_STAGE_STATUSIN,        /* (after OUT data) */
 195         MUSB_EP0_STAGE_STATUSOUT,       /* (after IN data) */
 196         MUSB_EP0_STAGE_ACKWAIT,         /* after zlp, before statusin */
 197 } __attribute__ ((packed));
 198
 199 /*
 200  * OTG protocol constants.  See USB OTG 1.3 spec,
 201  * sections 5.5 "Device Timings" and 6.6.5 "Timers".
 202  */
 203 #define OTG_TIME_A_WAIT_VRISE   100             /* msec (max) */
 204 #define OTG_TIME_A_WAIT_BCON    1100            /* min 1 second */
 205 #define OTG_TIME_A_AIDL_BDIS    200             /* min 200 msec */
 206 #define OTG_TIME_B_ASE0_BRST    100             /* min 3.125 ms */
 207
 208
 209 /*************************** REGISTER ACCESS ********************************/
 210
 211 /* Endpoint registers (other than dynfifo setup) can be accessed either
 212  * directly with the "flat" model, or after setting up an index register.
 213  */
 214
 215 #if defined(CONFIG_ARCH_DAVINCI) || defined(CONFIG_ARCH_OMAP2430) \
 216                 || defined(CONFIG_ARCH_OMAP3430) || defined(CONFIG_BLACKFIN) \
 217                 || defined(CONFIG_ARCH_OMAP4)
 218 /* REVISIT indexed access seemed to
 219  * misbehave (on DaVinci) for at least peripheral IN ...
 220  */
 221 #define MUSB_FLAT_REG
 222 #endif
 223
 224 /* TUSB mapping: "flat" plus ep0 special cases */
 225 #if     defined(CONFIG_USB_TUSB6010)
 226 #define musb_ep_select(_mbase, _epnum) \
 227         musb_writeb((_mbase), MUSB_INDEX, (_epnum))
 228 #define MUSB_EP_OFFSET                  MUSB_TUSB_OFFSET
 229
 230 /* "flat" mapping: each endpoint has its own i/o address */
 231 #elif   defined(MUSB_FLAT_REG)
 232 #define musb_ep_select(_mbase, _epnum)  (((void)(_mbase)), ((void)(_epnum)))
 233 #define MUSB_EP_OFFSET                  MUSB_FLAT_OFFSET
 234
 235 /* "indexed" mapping: INDEX register controls register bank select */
 236 #else
 237 #define musb_ep_select(_mbase, _epnum) \
 238         musb_writeb((_mbase), MUSB_INDEX, (_epnum))
 239 #define MUSB_EP_OFFSET                  MUSB_INDEXED_OFFSET
 240 #endif
 241
 242 /****************************** FUNCTIONS ********************************/
 243
 244 #define MUSB_HST_MODE(_musb)\
 245         { (_musb)->is_host = true; }
 246 #define MUSB_DEV_MODE(_musb) \
 247         { (_musb)->is_host = false; }
 248
 249 #define test_devctl_hst_mode(_x) \
 250         (musb_readb((_x)->mregs, MUSB_DEVCTL)&MUSB_DEVCTL_HM)
 251
 252 #define MUSB_MODE(musb) ((musb)->is_host ? "Host" : "Peripheral")
 253
 254 /******************************** TYPES *************************************/
 255
 256 /**
 257  * struct musb_platform_ops - Operations passed to musb_core by HW glue layer
 258  * @init:       turns on clocks, sets up platform-specific registers, etc
 259  * @exit:       undoes @init
 260  * @suspend:    platform-specific suspend, e.g. context save
 261  * @resume:     platform-specific resume, e.g. context restore
 262  * @set_mode:   forcefully changes operating mode
 263  * @try_ilde:   tries to idle the IP
 264  * @vbus_status: returns vbus status if possible
 265  * @set_vbus:   forces vbus status
 266  */
 267 struct musb_platform_ops {
 268         int     (*init)(struct musb *musb);
 269         int     (*exit)(struct musb *musb);
 270
 271         int     (*suspend)(struct musb *musb);
 272         int     (*resume)(struct musb *musb);
 273
 274         void    (*enable)(struct musb *musb);
 275         void    (*disable)(struct musb *musb);
 276
 277         int     (*set_mode)(struct musb *musb, u8 mode);
 278         void    (*try_idle)(struct musb *musb, unsigned long timeout);
 279
 280         int     (*vbus_status)(struct musb *musb);
 281         void    (*set_vbus)(struct musb *musb, int on);
 282 };
 283
 284 /*
 285  * struct musb_hw_ep - endpoint hardware (bidirectional)
 286  *
 287  * Ordered slightly for better cacheline locality.
 288  */
 289 struct musb_hw_ep {
 290         struct musb             *musb;
 291         void __iomem            *fifo;
 292         void __iomem            *regs;
 293
 294 #ifdef CONFIG_USB_TUSB6010
 295         void __iomem            *conf;
 296 #endif
 297
 298         /* index in musb->endpoints[]  */
 299         u8                      epnum;
 300
 301         /* hardware configuration, possibly dynamic */
 302         bool                    is_shared_fifo;
 303         bool                    tx_double_buffered;
 304         bool                    rx_double_buffered;
 305         u16                     max_packet_sz_tx;
 306         u16                     max_packet_sz_rx;
 307
 308         struct dma_channel      *tx_channel;
 309         struct dma_channel      *rx_channel;
 310
 311 #ifdef CONFIG_USB_TUSB6010
 312         /* TUSB has "asynchronous" and "synchronous" dma modes */
 313         dma_addr_t              fifo_async;
 314         dma_addr_t              fifo_sync;
 315         void __iomem            *fifo_sync_va;
 316 #endif
 317
 318 #ifdef CONFIG_USB_MUSB_HDRC_HCD
 319         void __iomem            *target_regs;
 320
 321         /* currently scheduled peripheral endpoint */
 322         struct musb_qh          *in_qh;
 323         struct musb_qh          *out_qh;
 324
 325         u8                      rx_reinit;
 326         u8                      tx_reinit;
 327 #endif
 328
 329 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
 330         /* peripheral side */
 331         struct musb_ep          ep_in;                  /* TX */
 332         struct musb_ep          ep_out;                 /* RX */
 333 #endif
 334 };
 335
 336 static inline struct usb_request *next_in_request(struct musb_hw_ep *hw_ep)
 337 {
 338 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
 339         return next_request(&hw_ep->ep_in);
 340 #else
 341         return NULL;
 342 #endif
 343 }
 344
 345 static inline struct usb_request *next_out_request(struct musb_hw_ep *hw_ep)
 346 {
 347 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
 348         return next_request(&hw_ep->ep_out);
 349 #else
 350         return NULL;
 351 #endif
 352 }
 353
 354 /*
 355  * struct musb - Driver instance data.
 356  */
 357 struct musb {
 358         /* device lock */
 359         spinlock_t              lock;
 360         struct clk              *clock;
 361         struct clk              *phy_clock;
 362         irqreturn_t             (*isr)(int, void *);
 363         struct work_struct      irq_work;
 364         u16                     hwvers;
 365
 366 /* this hub status bit is reserved by USB 2.0 and not seen by usbcore */
 367 #define MUSB_PORT_STAT_RESUME   (1 << 31)
 368
 369         u32                     port1_status;
 370
 371 #ifdef CONFIG_USB_MUSB_HDRC_HCD
 372         unsigned long           rh_timer;
 373
 374         enum musb_h_ep0_state   ep0_stage;
 375
 376         /* bulk traffic normally dedicates endpoint hardware, and each
 377          * direction has its own ring of host side endpoints.
 378          * we try to progress the transfer at the head of each endpoint's
 379          * queue until it completes or NAKs too much; then we try the next
 380          * endpoint.
 381          */
 382         struct musb_hw_ep       *bulk_ep;
 383
 384         struct list_head        control;        /* of musb_qh */
 385         struct list_head        in_bulk;        /* of musb_qh */
 386         struct list_head        out_bulk;       /* of musb_qh */
 387
 388         struct timer_list       otg_timer;
 389 #endif
 390
 391         /* called with IRQs blocked; ON/nonzero implies starting a session,
 392          * and waiting at least a_wait_vrise_tmout.
 393          */
 394         void                    (*board_set_vbus)(struct musb *, int is_on);
 395
 396         struct dma_controller   *dma_controller;
 397
 398         struct device           *controller;
 399         void __iomem            *ctrl_base;
 400         void __iomem            *mregs;
 401
 402 #ifdef CONFIG_USB_TUSB6010
 403         dma_addr_t              async;
 404         dma_addr_t              sync;
 405         void __iomem            *sync_va;
 406 #endif
 407
 408         /* passed down from chip/board specific irq handlers */
 409         u8                      int_usb;
 410         u16                     int_rx;
 411         u16                     int_tx;
 412
 413         struct otg_transceiver  *xceiv;
 414
 415         int nIrq;
 416         unsigned                irq_wake:1;
 417
 418         struct musb_hw_ep        endpoints[MUSB_C_NUM_EPS];
 419 #define control_ep              endpoints
 420
 421 #define VBUSERR_RETRY_COUNT     3
 422         u16                     vbuserr_retry;
 423         u16 epmask;
 424         u8 nr_endpoints;
 425
 426         u8 board_mode;          /* enum musb_mode */
 427         int                     (*board_set_power)(int state);
 428
 429         int                     (*set_clock)(struct clk *clk, int is_active);
 430
 431         u8                      min_power;      /* vbus for periph, in mA/2 */
 432
 433         bool                    is_host;
 434
 435         int                     a_wait_bcon;    /* VBUS timeout in msecs */
 436         unsigned long           idle_timeout;   /* Next timeout in jiffies */
 437
 438         /* active means connected and not suspended */
 439         unsigned                is_active:1;
 440
 441         unsigned is_multipoint:1;
 442         unsigned ignore_disconnect:1;   /* during bus resets */
 443
 444         unsigned                hb_iso_rx:1;    /* high bandwidth iso rx? */
 445         unsigned                hb_iso_tx:1;    /* high bandwidth iso tx? */
 446         unsigned                dyn_fifo:1;     /* dynamic FIFO supported? */
 447
 448         unsigned                bulk_split:1;
 449 #define can_bulk_split(musb,type) \
 450         (((type) == USB_ENDPOINT_XFER_BULK) && (musb)->bulk_split)
 451
 452         unsigned                bulk_combine:1;
 453 #define can_bulk_combine(musb,type) \
 454         (((type) == USB_ENDPOINT_XFER_BULK) && (musb)->bulk_combine)
 455
 456 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
 457         /* is_suspended means USB B_PERIPHERAL suspend */
 458         unsigned                is_suspended:1;
 459
 460         /* may_wakeup means remote wakeup is enabled */
 461         unsigned                may_wakeup:1;
 462
 463         /* is_self_powered is reported in device status and the
 464          * config descriptor.  is_bus_powered means B_PERIPHERAL
 465          * draws some VBUS current; both can be true.
 466          */
 467         unsigned                is_self_powered:1;
 468         unsigned                is_bus_powered:1;
 469
 470         unsigned                set_address:1;
 471         unsigned                test_mode:1;
 472         unsigned                softconnect:1;
 473
 474         u8                      address;
 475         u8                      test_mode_nr;
 476         u16                     ackpend;                /* ep0 */
 477         enum musb_g_ep0_state   ep0_state;
 478         struct usb_gadget       g;                      /* the gadget */
 479         struct usb_gadget_driver *gadget_driver;        /* its driver */
 480 #endif
 481
 482         struct musb_hdrc_config *config;
 483
 484 #ifdef MUSB_CONFIG_PROC_FS
 485         struct proc_dir_entry *proc_entry;
 486 #endif
 487 };
 488
 489 #ifdef CONFIG_PM
 490 struct musb_csr_regs {
 491         /* FIFO registers */
 492         u16 txmaxp, txcsr, rxmaxp, rxcsr;
 493         u16 rxfifoadd, txfifoadd;
 494         u8 txtype, txinterval, rxtype, rxinterval;
 495         u8 rxfifosz, txfifosz;
 496         u8 txfunaddr, txhubaddr, txhubport;
 497         u8 rxfunaddr, rxhubaddr, rxhubport;
 498 };
 499
 500 struct musb_context_registers {
 501
 502 #if defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP3) || \
 503     defined(CONFIG_ARCH_OMAP4)
 504         u32 otg_sysconfig, otg_forcestandby;
 505 #endif
 506         u8 power;
 507         u16 intrtxe, intrrxe;
 508         u8 intrusbe;
 509         u16 frame;
 510         u8 index, testmode;
 511
 512         u8 devctl, busctl, misc;
 513
 514         struct musb_csr_regs index_regs[MUSB_C_NUM_EPS];
 515 };
 516
 517 #if defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP3) || \
 518     defined(CONFIG_ARCH_OMAP4)
 519 extern void musb_platform_save_context(struct musb *musb,
 520                 struct musb_context_registers *musb_context);
 521 extern void musb_platform_restore_context(struct musb *musb,
 522                 struct musb_context_registers *musb_context);
 523 #else
 524 #define musb_platform_save_context(m, x)        do {} while (0)
 525 #define musb_platform_restore_context(m, x)     do {} while (0)
 526 #endif
 527
 528 #endif
 529
 530 static inline void musb_set_vbus(struct musb *musb, int is_on)
 531 {
 532         musb->board_set_vbus(musb, is_on);
 533 }
 534
 535 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
 536 static inline struct musb *gadget_to_musb(struct usb_gadget *g)
 537 {
 538         return container_of(g, struct musb, g);
 539 }
 540 #endif
 541
 542 #ifdef CONFIG_BLACKFIN
 543 static inline int musb_read_fifosize(struct musb *musb,
 544                 struct musb_hw_ep *hw_ep, u8 epnum)
 545 {
 546         musb->nr_endpoints++;
 547         musb->epmask |= (1 << epnum);
 548
 549         if (epnum < 5) {
 550                 hw_ep->max_packet_sz_tx = 128;
 551                 hw_ep->max_packet_sz_rx = 128;
 552         } else {
 553                 hw_ep->max_packet_sz_tx = 1024;
 554                 hw_ep->max_packet_sz_rx = 1024;
 555         }
 556         hw_ep->is_shared_fifo = false;
 557
 558         return 0;
 559 }
 560
 561 static inline void musb_configure_ep0(struct musb *musb)
 562 {
 563         musb->endpoints[0].max_packet_sz_tx = MUSB_EP0_FIFOSIZE;
 564         musb->endpoints[0].max_packet_sz_rx = MUSB_EP0_FIFOSIZE;
 565         musb->endpoints[0].is_shared_fifo = true;
 566 }
 567
 568 #else
 569
 570 static inline int musb_read_fifosize(struct musb *musb,
 571                 struct musb_hw_ep *hw_ep, u8 epnum)
 572 {
 573         void *mbase = musb->mregs;
 574         u8 reg = 0;
 575
 576         /* read from core using indexed model */
 577         reg = musb_readb(mbase, MUSB_EP_OFFSET(epnum, MUSB_FIFOSIZE));
 578         /* 0's returned when no more endpoints */
 579         if (!reg)
 580                 return -ENODEV;
 581
 582         musb->nr_endpoints++;
 583         musb->epmask |= (1 << epnum);
 584
 585         hw_ep->max_packet_sz_tx = 1 << (reg & 0x0f);
 586
 587         /* shared TX/RX FIFO? */
 588         if ((reg & 0xf0) == 0xf0) {
 589                 hw_ep->max_packet_sz_rx = hw_ep->max_packet_sz_tx;
 590                 hw_ep->is_shared_fifo = true;
 591                 return 0;
 592         } else {
 593                 hw_ep->max_packet_sz_rx = 1 << ((reg & 0xf0) >> 4);
 594                 hw_ep->is_shared_fifo = false;
 595         }
 596
 597         return 0;
 598 }
 599
 600 static inline void musb_configure_ep0(struct musb *musb)
 601 {
 602         musb->endpoints[0].max_packet_sz_tx = MUSB_EP0_FIFOSIZE;
 603         musb->endpoints[0].max_packet_sz_rx = MUSB_EP0_FIFOSIZE;
 604         musb->endpoints[0].is_shared_fifo = true;
 605 }
 606 #endif /* CONFIG_BLACKFIN */
 607
 608
 609 /***************************** Glue it together *****************************/
 610
 611 extern const char musb_driver_name[];
 612
 613 extern void musb_start(struct musb *musb);
 614 extern void musb_stop(struct musb *musb);
 615
 616 extern void musb_write_fifo(struct musb_hw_ep *ep, u16 len, const u8 *src);
 617 extern void musb_read_fifo(struct musb_hw_ep *ep, u16 len, u8 *dst);
 618
 619 extern void musb_load_testpacket(struct musb *);
 620
 621 extern irqreturn_t musb_interrupt(struct musb *);
 622
 623 extern void musb_platform_enable(struct musb *musb);
 624 extern void musb_platform_disable(struct musb *musb);
 625
 626 extern void musb_hnp_stop(struct musb *musb);
 627
 628 extern int musb_platform_set_mode(struct musb *musb, u8 musb_mode);
 629
 630 #if defined(CONFIG_USB_TUSB6010) || defined(CONFIG_BLACKFIN) || \
 631         defined(CONFIG_ARCH_DAVINCI_DA8XX) || \
 632         defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP3) || \
 633         defined(CONFIG_ARCH_OMAP4)
 634 extern void musb_platform_try_idle(struct musb *musb, unsigned long timeout);
 635 #else
 636 #define musb_platform_try_idle(x, y)            do {} while (0)
 637 #endif
 638
 639 #if defined(CONFIG_USB_TUSB6010) || defined(CONFIG_BLACKFIN)
 640 extern int musb_platform_get_vbus_status(struct musb *musb);
 641 #else
 642 #define musb_platform_get_vbus_status(x)        0
 643 #endif
 644
 645 extern int __init musb_platform_init(struct musb *musb);
 646 extern int musb_platform_exit(struct musb *musb);
 647
 648 #endif  /* __MUSB_CORE_H__ */