target/linux/adm5120/files/drivers/usb/host/adm5120.h

   1 /*
   2  * ADM5120 HCD (Host Controller Driver) for USB
   3  *
   4  * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org>
   5  *
   6  * This file was derived from: drivers/usb/host/ohci.h
   7  *   (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
   8  *   (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
   9  *
  10  *  This program is free software; you can redistribute it and/or modify it
  11  *  under the terms of the GNU General Public License version 2 as published
  12  *  by the Free Software Foundation.
  13  *
  14  */
  15
  16 /*
  17  * __hc32 and __hc16 are "Host Controller" types, they may be equivalent to
  18  * __leXX (normally) or __beXX (given OHCI_BIG_ENDIAN), depending on the
  19  * host controller implementation.
  20  */
  21 typedef __u32 __bitwise __hc32;
  22 typedef __u16 __bitwise __hc16;
  23
  24 /*
  25  * OHCI Endpoint Descriptor (ED) ... holds TD queue
  26  * See OHCI spec, section 4.2
  27  *
  28  * This is a "Queue Head" for those transfers, which is why
  29  * both EHCI and UHCI call similar structures a "QH".
  30  */
  31
  32 #define TD_DATALEN_MAX  4096
  33
  34 #define ED_ALIGN        16
  35 #define ED_MASK ((u32)~(ED_ALIGN-1))    /* strip hw status in low addr bits */
  36
  37 struct ed {
  38         /* first fields are hardware-specified */
  39         __hc32                  hwINFO;      /* endpoint config bitmap */
  40         /* info bits defined by hcd */
  41 #define ED_DEQUEUE      (1 << 27)
  42         /* info bits defined by the hardware */
  43 #define ED_MPS_SHIFT    16
  44 #define ED_MPS_MASK     ((1 << 11)-1)
  45 #define ED_MPS_GET(x)   (((x) >> ED_MPS_SHIFT) & ED_MPS_MASK)
  46 #define ED_ISO          (1 << 15)               /* isochronous endpoint */
  47 #define ED_SKIP         (1 << 14)
  48 #define ED_SPEED_FULL   (1 << 13)               /* fullspeed device */
  49 #define ED_INT          (1 << 11)               /* interrupt endpoint */
  50 #define ED_EN_SHIFT     7                       /* endpoint shift */
  51 #define ED_EN_MASK      ((1 << 4)-1)            /* endpoint mask */
  52 #define ED_EN_GET(x)    (((x) >> ED_EN_SHIFT) & ED_EN_MASK)
  53 #define ED_FA_MASK      ((1 << 7)-1)            /* function address mask */
  54 #define ED_FA_GET(x)    ((x) & ED_FA_MASK)
  55         __hc32                  hwTailP;        /* tail of TD list */
  56         __hc32                  hwHeadP;        /* head of TD list (hc r/w) */
  57 #define ED_C            (0x02)                  /* toggle carry */
  58 #define ED_H            (0x01)                  /* halted */
  59         __hc32                  hwNextED;       /* next ED in list */
  60
  61         /* rest are purely for the driver's use */
  62         dma_addr_t              dma;            /* addr of ED */
  63         struct td               *dummy;         /* next TD to activate */
  64
  65         struct list_head        urb_list;       /* list of our URBs */
  66
  67         /* host's view of schedule */
  68         struct ed               *ed_next;       /* on schedule list */
  69         struct ed               *ed_prev;       /* for non-interrupt EDs */
  70         struct ed               *ed_rm_next;    /* on rm list */
  71         struct list_head        td_list;        /* "shadow list" of our TDs */
  72
  73         /* create --> IDLE --> OPER --> ... --> IDLE --> destroy
  74          * usually:  OPER --> UNLINK --> (IDLE | OPER) --> ...
  75          */
  76         u8                      state;          /* ED_{IDLE,UNLINK,OPER} */
  77 #define ED_IDLE         0x00            /* NOT linked to HC */
  78 #define ED_UNLINK       0x01            /* being unlinked from hc */
  79 #define ED_OPER         0x02            /* IS linked to hc */
  80
  81         u8                      type;           /* PIPE_{BULK,...} */
  82
  83         /* periodic scheduling params (for intr and iso) */
  84         u8                      branch;
  85         u16                     interval;
  86         u16                     load;
  87         u16                     last_iso;       /* iso only */
  88
  89         /* HC may see EDs on rm_list until next frame (frame_no == tick) */
  90         u16                     tick;
  91 } __attribute__ ((aligned(ED_ALIGN)));
  92
  93 /*
  94  * OHCI Transfer Descriptor (TD) ... one per transfer segment
  95  * See OHCI spec, sections 4.3.1 (general = control/bulk/interrupt)
  96  * and 4.3.2 (iso)
  97  */
  98
  99 #define TD_ALIGN        32
 100 #define TD_MASK ((u32)~(TD_ALIGN-1))    /* strip hw status in low addr bits */
 101
 102 struct td {
 103         /* first fields are hardware-specified */
 104         __hc32          hwINFO;         /* transfer info bitmask */
 105
 106         /* hwINFO bits */
 107 #define TD_OWN          (1 << 31)               /* owner of the descriptor */
 108 #define TD_CC_SHIFT     27                      /* condition code */
 109 #define TD_CC_MASK      0xf
 110 #define TD_CC           (TD_CC_MASK << TD_CC_SHIFT)
 111 #define TD_CC_GET(x)    (((x) >> TD_CC_SHIFT) & TD_CC_MASK)
 112
 113 #define TD_EC_SHIFT     25                      /* error count */
 114 #define TD_EC_MASK      0x3
 115 #define TD_EC           (TD_EC_MASK << TD_EC_SHIFT)
 116 #define TD_EC_GET(x)    ((x >> TD_EC_SHIFT) & TD_EC_MASK)
 117 #define TD_T_SHIFT      23                      /* data toggle state */
 118 #define TD_T_MASK       0x3
 119 #define TD_T            (TD_T_MASK << TD_T_SHIFT)
 120 #define TD_T_DATA0      (0x2 << TD_T_SHIFT)     /* DATA0 */
 121 #define TD_T_DATA1      (0x3 << TD_T_SHIFT)     /* DATA1 */
 122 #define TD_T_CARRY      (0x0 << TD_T_SHIFT)     /* uses ED_C */
 123 #define TD_T_GET(x)     (((x) >> TD_T_SHIFT) & TD_T_MASK)
 124 #define TD_DP_SHIFT     21                      /* direction/pid */
 125 #define TD_DP_MASK      0x3
 126 #define TD_DP           (TD_DP_MASK << TD_DP_SHIFT)
 127 #define TD_DP_GET       (((x) >> TD_DP_SHIFT) & TD_DP_MASK)
 128 #define TD_DP_SETUP     (0x0 << TD_DP_SHIFT)    /* SETUP pid */
 129 #define TD_DP_OUT       (0x1 << TD_DP_SHIFT)    /* OUT pid */
 130 #define TD_DP_IN        (0x2 << TD_DP_SHIFT)    /* IN pid */
 131 #define TD_ISI_SHIFT    8                       /* Interrupt Service Interval */
 132 #define TD_ISI_MASK     0x3f
 133 #define TD_ISI_GET(x)   (((x) >> TD_ISI_SHIFT) & TD_ISI_MASK)
 134 #define TD_FN_MASK      0x3f                    /* frame number */
 135 #define TD_FN_GET(x)    ((x) & TD_FN_MASK)
 136
 137         __hc32          hwDBP;          /* Data Buffer Pointer (or 0) */
 138         __hc32          hwCBL;          /* Controller/Buffer Length */
 139
 140         /* hwCBL bits */
 141 #define TD_BL_MASK      0xffff          /* buffer length */
 142 #define TD_BL_GET(x)    ((x) & TD_BL_MASK)
 143 #define TD_IE           (1 << 16)       /* interrupt enable */
 144         __hc32          hwNextTD;       /* Next TD Pointer */
 145
 146         /* rest are purely for the driver's use */
 147         __u8            index;
 148         struct ed       *ed;
 149         struct td       *td_hash;       /* dma-->td hashtable */
 150         struct td       *next_dl_td;
 151         struct urb      *urb;
 152
 153         dma_addr_t      td_dma;         /* addr of this TD */
 154         dma_addr_t      data_dma;       /* addr of data it points to */
 155
 156         struct list_head td_list;       /* "shadow list", TDs on same ED */
 157
 158         u32             flags;
 159 #define TD_FLAG_DONE    (1 << 17)       /* retired to done list */
 160 #define TD_FLAG_ISO     (1 << 16)       /* copy of ED_ISO */
 161 } __attribute__ ((aligned(TD_ALIGN)));  /* c/b/i need 16; only iso needs 32 */
 162
 163 /*
 164  * Hardware transfer status codes -- CC from td->hwINFO
 165  */
 166 #define TD_CC_NOERROR           0x00
 167 #define TD_CC_CRC               0x01
 168 #define TD_CC_BITSTUFFING       0x02
 169 #define TD_CC_DATATOGGLEM       0x03
 170 #define TD_CC_STALL             0x04
 171 #define TD_CC_DEVNOTRESP        0x05
 172 #define TD_CC_PIDCHECKFAIL      0x06
 173 #define TD_CC_UNEXPECTEDPID     0x07
 174 #define TD_CC_DATAOVERRUN       0x08
 175 #define TD_CC_DATAUNDERRUN      0x09
 176     /* 0x0A, 0x0B reserved for hardware */
 177 #define TD_CC_BUFFEROVERRUN     0x0C
 178 #define TD_CC_BUFFERUNDERRUN    0x0D
 179     /* 0x0E, 0x0F reserved for HCD */
 180 #define TD_CC_HCD0              0x0E
 181 #define TD_CC_NOTACCESSED       0x0F
 182
 183 /*
 184  * preshifted status codes
 185  */
 186 #define TD_SCC_NOTACCESSED      (TD_CC_NOTACCESSED << TD_CC_SHIFT)
 187
 188
 189 /* map OHCI TD status codes (CC) to errno values */
 190 static const int cc_to_error [16] = {
 191         /* No  Error  */        0,
 192         /* CRC Error  */        -EILSEQ,
 193         /* Bit Stuff  */        -EPROTO,
 194         /* Data Togg  */        -EILSEQ,
 195         /* Stall      */        -EPIPE,
 196         /* DevNotResp */        -ETIME,
 197         /* PIDCheck   */        -EPROTO,
 198         /* UnExpPID   */        -EPROTO,
 199         /* DataOver   */        -EOVERFLOW,
 200         /* DataUnder  */        -EREMOTEIO,
 201         /* (for hw)   */        -EIO,
 202         /* (for hw)   */        -EIO,
 203         /* BufferOver */        -ECOMM,
 204         /* BuffUnder  */        -ENOSR,
 205         /* (for HCD)  */        -EALREADY,
 206         /* (for HCD)  */        -EALREADY
 207 };
 208
 209 #define NUM_INTS        32
 210
 211 /*
 212  * This is the structure of the OHCI controller's memory mapped I/O region.
 213  * You must use readl() and writel() (in <asm/io.h>) to access these fields!!
 214  * Layout is in section 7 (and appendix B) of the spec.
 215  */
 216 struct admhcd_regs {
 217         __hc32  gencontrol;     /* General Control */
 218         __hc32  int_status;     /* Interrupt Status */
 219         __hc32  int_enable;     /* Interrupt Enable */
 220         __hc32  reserved00;
 221         __hc32  host_control;   /* Host General Control */
 222         __hc32  reserved01;
 223         __hc32  fminterval;     /* Frame Interval */
 224         __hc32  fmnumber;       /* Frame Number */
 225         __hc32  reserved02;
 226         __hc32  reserved03;
 227         __hc32  reserved04;
 228         __hc32  reserved05;
 229         __hc32  reserved06;
 230         __hc32  reserved07;
 231         __hc32  reserved08;
 232         __hc32  reserved09;
 233         __hc32  reserved10;
 234         __hc32  reserved11;
 235         __hc32  reserved12;
 236         __hc32  reserved13;
 237         __hc32  reserved14;
 238         __hc32  reserved15;
 239         __hc32  reserved16;
 240         __hc32  reserved17;
 241         __hc32  reserved18;
 242         __hc32  reserved19;
 243         __hc32  reserved20;
 244         __hc32  reserved21;
 245         __hc32  lsthresh;       /* Low Speed Threshold */
 246         __hc32  rhdesc;         /* Root Hub Descriptor */
 247 #define MAX_ROOT_PORTS  2
 248         __hc32  portstatus[MAX_ROOT_PORTS]; /* Port Status */
 249         __hc32  hosthead;       /* Host Descriptor Head */
 250 } __attribute__ ((aligned(32)));
 251
 252 /*
 253  * General Control register bits
 254  */
 255 #define ADMHC_CTRL_UHFE (1 << 0)        /* USB Host Function Enable */
 256 #define ADMHC_CTRL_SIR  (1 << 1)        /* Software Interrupt request */
 257 #define ADMHC_CTRL_DMAA (1 << 2)        /* DMA Arbitration Control */
 258 #define ADMHC_CTRL_SR   (1 << 3)        /* Software Reset */
 259
 260 /*
 261  * Host General Control register bits
 262  */
 263 #define ADMHC_HC_BUSS           0x3             /* USB bus state */
 264 #define   ADMHC_BUSS_RESET      0x0
 265 #define   ADMHC_BUSS_RESUME     0x1
 266 #define   ADMHC_BUSS_OPER       0x2
 267 #define   ADMHC_BUSS_SUSPEND    0x3
 268 #define ADMHC_HC_DMAE           (1 << 2)        /* DMA enable */
 269
 270 /*
 271  * Interrupt Status/Enable register bits
 272  */
 273 #define ADMHC_INTR_SOFI (1 << 4)        /* start of frame */
 274 #define ADMHC_INTR_RESI (1 << 5)        /* resume detected */
 275 #define ADMHC_INTR_6    (1 << 6)        /* unknown */
 276 #define ADMHC_INTR_7    (1 << 7)        /* unknown */
 277 #define ADMHC_INTR_BABI (1 << 8)        /* babble detected */
 278 #define ADMHC_INTR_INSM (1 << 9)        /* root hub status change */
 279 #define ADMHC_INTR_SO   (1 << 10)       /* scheduling overrun */
 280 #define ADMHC_INTR_FNO  (1 << 11)       /* frame number overflow */
 281 #define ADMHC_INTR_TDC  (1 << 20)       /* transfer descriptor completed */
 282 #define ADMHC_INTR_SWI  (1 << 29)       /* software interrupt */
 283 #define ADMHC_INTR_FATI (1 << 30)       /* fatal error */
 284 #define ADMHC_INTR_INTA (1 << 31)       /* interrupt active */
 285
 286 #define ADMHC_INTR_MIE  (1 << 31)       /* master interrupt enable */
 287
 288 /*
 289  * SOF Frame Interval register bits
 290  */
 291 #define ADMHC_SFI_FI_MASK       ((1 << 14)-1)   /* Frame Interval value */
 292 #define ADMHC_SFI_FSLDP_SHIFT   16
 293 #define ADMHC_SFI_FSLDP_MASK    ((1 << 15)-1)
 294 #define ADMHC_SFI_FIT           (1 << 31)       /* Frame Interval Toggle */
 295
 296 /*
 297  * SOF Frame Number register bits
 298  */
 299 #define ADMHC_SFN_FN_MASK       ((1 << 16)-1)   /* Frame Number Mask */
 300 #define ADMHC_SFN_FR_SHIFT      16              /* Frame Remaining Shift */
 301 #define ADMHC_SFN_FR_MASK       ((1 << 14)-1)   /* Frame Remaining Mask */
 302 #define ADMHC_SFN_FRT           (1 << 31)       /* Frame Remaining Toggle */
 303
 304 /*
 305  * Root Hub Descriptor register bits
 306  */
 307 #define ADMHC_RH_NUMP   0xff            /* number of ports */
 308 #define ADMHC_RH_PSM    (1 << 8)        /* power switching mode */
 309 #define ADMHC_RH_NPS    (1 << 9)        /* no power switching */
 310 #define ADMHC_RH_OCPM   (1 << 10)       /* over current protection mode */
 311 #define ADMHC_RH_NOCP   (1 << 11)       /* no over current protection */
 312 #define ADMHC_RH_PPCM   (0xff << 16)    /* port power control */
 313
 314 #define ADMHC_RH_LPS    (1 << 24)       /* local power switch */
 315 #define ADMHC_RH_OCI    (1 << 25)       /* over current indicator */
 316
 317 /* status change bits */
 318 #define ADMHC_RH_LPSC   (1 << 26)       /* local power switch change */
 319 #define ADMHC_RH_OCIC   (1 << 27)       /* over current indicator change */
 320
 321 #define ADMHC_RH_DRWE   (1 << 28)       /* device remote wakeup enable */
 322 #define ADMHC_RH_CRWE   (1 << 29)       /* clear remote wakeup enable */
 323
 324 #define ADMHC_RH_CGP    (1 << 24)       /* clear global power */
 325 #define ADMHC_RH_SGP    (1 << 26)       /* set global power */
 326
 327 /*
 328  * Port Status register bits
 329  */
 330 #define ADMHC_PS_CCS    (1 << 0)        /* current connect status */
 331 #define ADMHC_PS_PES    (1 << 1)        /* port enable status */
 332 #define ADMHC_PS_PSS    (1 << 2)        /* port suspend status */
 333 #define ADMHC_PS_POCI   (1 << 3)        /* port over current indicator */
 334 #define ADMHC_PS_PRS    (1 << 4)        /* port reset status */
 335 #define ADMHC_PS_PPS    (1 << 8)        /* port power status */
 336 #define ADMHC_PS_LSDA   (1 << 9)        /* low speed device attached */
 337
 338 /* status change bits */
 339 #define ADMHC_PS_CSC    (1 << 16)       /* connect status change */
 340 #define ADMHC_PS_PESC   (1 << 17)       /* port enable status change */
 341 #define ADMHC_PS_PSSC   (1 << 18)       /* port suspend status change */
 342 #define ADMHC_PS_OCIC   (1 << 19)       /* over current indicator change */
 343 #define ADMHC_PS_PRSC   (1 << 20)       /* port reset status change */
 344
 345 /* port feature bits */
 346 #define ADMHC_PS_CPE    (1 << 0)        /* clear port enable */
 347 #define ADMHC_PS_SPE    (1 << 1)        /* set port enable */
 348 #define ADMHC_PS_SPS    (1 << 2)        /* set port suspend */
 349 #define ADMHC_PS_CPS    (1 << 3)        /* clear suspend status */
 350 #define ADMHC_PS_SPR    (1 << 4)        /* set port reset */
 351 #define ADMHC_PS_SPP    (1 << 8)        /* set port power */
 352 #define ADMHC_PS_CPP    (1 << 9)        /* clear port power */
 353
 354 /*
 355  * the POTPGT value is not defined in the ADMHC, so define a dummy value
 356  */
 357 #define ADMHC_POTPGT    2               /* in ms */
 358
 359 /* hcd-private per-urb state */
 360 struct urb_priv {
 361         struct ed               *ed;
 362         struct list_head        pending;        /* URBs on the same ED */
 363
 364         u32                     td_cnt;         /* # tds in this request */
 365         u32                     td_idx;         /* index of the current td */
 366         struct td               *td[0];         /* all TDs in this request */
 367 };
 368
 369 #define TD_HASH_SIZE    64    /* power'o'two */
 370 /* sizeof (struct td) ~= 64 == 2^6 ... */
 371 #define TD_HASH_FUNC(td_dma) ((td_dma ^ (td_dma >> 6)) % TD_HASH_SIZE)
 372
 373 /*
 374  * This is the full ADMHCD controller description
 375  *
 376  * Note how the "proper" USB information is just
 377  * a subset of what the full implementation needs. (Linus)
 378  */
 379
 380 struct admhcd {
 381         spinlock_t              lock;
 382
 383         /*
 384          * I/O memory used to communicate with the HC (dma-consistent)
 385          */
 386         struct admhcd_regs __iomem *regs;
 387
 388         /*
 389          * hcd adds to schedule for a live hc any time, but removals finish
 390          * only at the start of the next frame.
 391          */
 392
 393         struct ed               *ed_head;
 394         struct ed               *ed_tails[4];
 395
 396         struct ed               *ed_rm_list;    /* to be removed */
 397
 398         struct ed               *periodic[NUM_INTS];    /* shadow int_table */
 399
 400 #if 0   /* TODO: remove? */
 401         /*
 402          * OTG controllers and transceivers need software interaction;
 403          * other external transceivers should be software-transparent
 404          */
 405         struct otg_transceiver  *transceiver;
 406 #endif
 407
 408         /*
 409          * memory management for queue data structures
 410          */
 411         struct dma_pool         *td_cache;
 412         struct dma_pool         *ed_cache;
 413         struct td               *td_hash[TD_HASH_SIZE];
 414         struct list_head        pending;
 415
 416         /*
 417          * driver state
 418          */
 419         int                     num_ports;
 420         int                     load[NUM_INTS];
 421         u32                     host_control;   /* copy of the host_control reg */
 422         unsigned long           next_statechange;       /* suspend/resume */
 423         u32                     fminterval;             /* saved register */
 424         unsigned                autostop:1;     /* rh auto stopping/stopped */
 425
 426         unsigned long           flags;          /* for HC bugs */
 427 #define OHCI_QUIRK_AMD756       0x01                    /* erratum #4 */
 428 #define OHCI_QUIRK_SUPERIO      0x02                    /* natsemi */
 429 #define OHCI_QUIRK_INITRESET    0x04                    /* SiS, OPTi, ... */
 430 #define OHCI_QUIRK_BE_DESC      0x08                    /* BE descriptors */
 431 #define OHCI_QUIRK_BE_MMIO      0x10                    /* BE registers */
 432 #define OHCI_QUIRK_ZFMICRO      0x20                    /* Compaq ZFMicro chipset*/
 433         // there are also chip quirks/bugs in init logic
 434
 435 #ifdef DEBUG
 436         struct dentry           *debug_dir;
 437         struct dentry           *debug_async;
 438         struct dentry           *debug_periodic;
 439         struct dentry           *debug_registers;
 440 #endif
 441 };
 442
 443 /* convert between an hcd pointer and the corresponding ahcd_hcd */
 444 static inline struct admhcd *hcd_to_admhcd(struct usb_hcd *hcd)
 445 {
 446         return (struct admhcd *)(hcd->hcd_priv);
 447 }
 448 static inline struct usb_hcd *admhcd_to_hcd(const struct admhcd *ahcd)
 449 {
 450         return container_of((void *)ahcd, struct usb_hcd, hcd_priv);
 451 }
 452
 453 /*-------------------------------------------------------------------------*/
 454
 455 #ifndef DEBUG
 456 #define STUB_DEBUG_FILES
 457 #endif  /* DEBUG */
 458
 459 #ifdef DEBUG
 460 #       define admhc_dbg(ahcd, fmt, args...) \
 461                 printk(KERN_DEBUG "adm5120-hcd: " fmt , ## args )
 462 #else
 463 #       define admhc_dbg(ahcd, fmt, args...) do { } while (0)
 464 #endif
 465
 466 #define admhc_err(ahcd, fmt, args...) \
 467         printk(KERN_ERR "adm5120-hcd: " fmt , ## args )
 468 #define admhc_info(ahcd, fmt, args...) \
 469         printk(KERN_INFO "adm5120-hcd: " fmt , ## args )
 470 #define admhc_warn(ahcd, fmt, args...) \
 471         printk(KERN_WARNING "adm5120-hcd: " fmt , ## args )
 472
 473 #ifdef ADMHC_VERBOSE_DEBUG
 474 #       define admhc_vdbg admhc_dbg
 475 #else
 476 #       define admhc_vdbg(ahcd, fmt, args...) do { } while (0)
 477 #endif
 478
 479 /*-------------------------------------------------------------------------*/
 480
 481 /*
 482  * While most USB host controllers implement their registers and
 483  * in-memory communication descriptors in little-endian format,
 484  * a minority (notably the IBM STB04XXX and the Motorola MPC5200
 485  * processors) implement them in big endian format.
 486  *
 487  * In addition some more exotic implementations like the Toshiba
 488  * Spider (aka SCC) cell southbridge are "mixed" endian, that is,
 489  * they have a different endianness for registers vs. in-memory
 490  * descriptors.
 491  *
 492  * This attempts to support either format at compile time without a
 493  * runtime penalty, or both formats with the additional overhead
 494  * of checking a flag bit.
 495  *
 496  * That leads to some tricky Kconfig rules howevber. There are
 497  * different defaults based on some arch/ppc platforms, though
 498  * the basic rules are:
 499  *
 500  * Controller type              Kconfig options needed
 501  * ---------------              ----------------------
 502  * little endian                CONFIG_USB_ADMHC_LITTLE_ENDIAN
 503  *
 504  * fully big endian             CONFIG_USB_ADMHC_BIG_ENDIAN_DESC _and_
 505  *                              CONFIG_USB_ADMHC_BIG_ENDIAN_MMIO
 506  *
 507  * mixed endian                 CONFIG_USB_ADMHC_LITTLE_ENDIAN _and_
 508  *                              CONFIG_USB_OHCI_BIG_ENDIAN_{MMIO,DESC}
 509  *
 510  * (If you have a mixed endian controller, you -must- also define
 511  * CONFIG_USB_ADMHC_LITTLE_ENDIAN or things will not work when building
 512  * both your mixed endian and a fully big endian controller support in
 513  * the same kernel image).
 514  */
 515
 516 #ifdef CONFIG_USB_ADMHC_BIG_ENDIAN_DESC
 517 #ifdef CONFIG_USB_ADMHC_LITTLE_ENDIAN
 518 #define big_endian_desc(ahcd)   (ahcd->flags & OHCI_QUIRK_BE_DESC)
 519 #else
 520 #define big_endian_desc(ahcd)   1               /* only big endian */
 521 #endif
 522 #else
 523 #define big_endian_desc(ahcd)   0               /* only little endian */
 524 #endif
 525
 526 #ifdef CONFIG_USB_ADMHC_BIG_ENDIAN_MMIO
 527 #ifdef CONFIG_USB_ADMHC_LITTLE_ENDIAN
 528 #define big_endian_mmio(ahcd)   (ahcd->flags & OHCI_QUIRK_BE_MMIO)
 529 #else
 530 #define big_endian_mmio(ahcd)   1               /* only big endian */
 531 #endif
 532 #else
 533 #define big_endian_mmio(ahcd)   0               /* only little endian */
 534 #endif
 535
 536 /*
 537  * Big-endian read/write functions are arch-specific.
 538  * Other arches can be added if/when they're needed.
 539  *
 540  * REVISIT: arch/powerpc now has readl/writel_be, so the
 541  * definition below can die once the STB04xxx support is
 542  * finally ported over.
 543  */
 544 #if defined(CONFIG_PPC) && !defined(CONFIG_PPC_MERGE)
 545 #define readl_be(addr)          in_be32((__force unsigned *)addr)
 546 #define writel_be(val, addr)    out_be32((__force unsigned *)addr, val)
 547 #endif
 548
 549 static inline unsigned int admhc_readl(const struct admhcd *ahcd,
 550         __hc32 __iomem *regs)
 551 {
 552 #ifdef CONFIG_USB_ADMHC_BIG_ENDIAN_MMIO
 553         return big_endian_mmio(ahcd) ?
 554                 readl_be(regs) :
 555                 readl(regs);
 556 #else
 557         return readl(regs);
 558 #endif
 559 }
 560
 561 static inline void admhc_writel(const struct admhcd *ahcd,
 562         const unsigned int val, __hc32 __iomem *regs)
 563 {
 564 #ifdef CONFIG_USB_ADMHC_BIG_ENDIAN_MMIO
 565         big_endian_mmio(ahcd) ?
 566                 writel_be(val, regs) :
 567                 writel(val, regs);
 568 #else
 569                 writel(val, regs);
 570 #endif
 571 }
 572
 573 static inline void admhc_writel_flush(const struct admhcd *ahcd)
 574 {
 575 #if 0
 576         /* TODO: remove? */
 577         (void) admhc_readl(ahcd, &ahcd->regs->gencontrol);
 578 #endif
 579 }
 580
 581
 582 /*-------------------------------------------------------------------------*/
 583
 584 /* cpu to ahcd */
 585 static inline __hc16 cpu_to_hc16(const struct admhcd *ahcd, const u16 x)
 586 {
 587         return big_endian_desc(ahcd) ?
 588                 (__force __hc16)cpu_to_be16(x) :
 589                 (__force __hc16)cpu_to_le16(x);
 590 }
 591
 592 static inline __hc16 cpu_to_hc16p(const struct admhcd *ahcd, const u16 *x)
 593 {
 594         return big_endian_desc(ahcd) ?
 595                 cpu_to_be16p(x) :
 596                 cpu_to_le16p(x);
 597 }
 598
 599 static inline __hc32 cpu_to_hc32(const struct admhcd *ahcd, const u32 x)
 600 {
 601         return big_endian_desc(ahcd) ?
 602                 (__force __hc32)cpu_to_be32(x) :
 603                 (__force __hc32)cpu_to_le32(x);
 604 }
 605
 606 static inline __hc32 cpu_to_hc32p(const struct admhcd *ahcd, const u32 *x)
 607 {
 608         return big_endian_desc(ahcd) ?
 609                 cpu_to_be32p(x) :
 610                 cpu_to_le32p(x);
 611 }
 612
 613 /* ahcd to cpu */
 614 static inline u16 hc16_to_cpu(const struct admhcd *ahcd, const __hc16 x)
 615 {
 616         return big_endian_desc(ahcd) ?
 617                 be16_to_cpu((__force __be16)x) :
 618                 le16_to_cpu((__force __le16)x);
 619 }
 620
 621 static inline u16 hc16_to_cpup(const struct admhcd *ahcd, const __hc16 *x)
 622 {
 623         return big_endian_desc(ahcd) ?
 624                 be16_to_cpup((__force __be16 *)x) :
 625                 le16_to_cpup((__force __le16 *)x);
 626 }
 627
 628 static inline u32 hc32_to_cpu(const struct admhcd *ahcd, const __hc32 x)
 629 {
 630         return big_endian_desc(ahcd) ?
 631                 be32_to_cpu((__force __be32)x) :
 632                 le32_to_cpu((__force __le32)x);
 633 }
 634
 635 static inline u32 hc32_to_cpup(const struct admhcd *ahcd, const __hc32 *x)
 636 {
 637         return big_endian_desc(ahcd) ?
 638                 be32_to_cpup((__force __be32 *)x) :
 639                 le32_to_cpup((__force __le32 *)x);
 640 }
 641
 642 /*-------------------------------------------------------------------------*/
 643
 644 static inline u16 admhc_frame_no(const struct admhcd *ahcd)
 645 {
 646         u32     t;
 647
 648         t = admhc_readl(ahcd, &ahcd->regs->fmnumber) & ADMHC_SFN_FN_MASK;
 649         return (u16)t;
 650 }
 651
 652 static inline u16 admhc_frame_remain(const struct admhcd *ahcd)
 653 {
 654         u32     t;
 655
 656         t = admhc_readl(ahcd, &ahcd->regs->fmnumber) >> ADMHC_SFN_FR_SHIFT;
 657         t &= ADMHC_SFN_FR_MASK;
 658         return (u16)t;
 659 }
 660
 661 /*-------------------------------------------------------------------------*/
 662
 663 static inline void admhc_disable(struct admhcd *ahcd)
 664 {
 665         admhcd_to_hcd(ahcd)->state = HC_STATE_HALT;
 666 }
 667
 668 #define FI              0x2edf          /* 12000 bits per frame (-1) */
 669 #define FSLDP(fi)       (0x7fff & ((6 * ((fi) - 1200)) / 7))
 670 #define FIT             ADMHC_SFI_FIT
 671 #define LSTHRESH        0x628           /* lowspeed bit threshold */
 672
 673 static inline void periodic_reinit(struct admhcd *ahcd)
 674 {
 675 #if 0
 676         u32     fi = ahcd->fminterval & ADMHC_SFI_FI_MASK;
 677         u32     fit = admhc_readl(ahcd, &ahcd->regs->fminterval) & FIT;
 678
 679         /* TODO: adjust FSLargestDataPacket value too? */
 680         admhc_writel(ahcd, (fit ^ FIT) | ahcd->fminterval,
 681                                         &ahcd->regs->fminterval);
 682 #else
 683         u32     fit = admhc_readl(ahcd, &ahcd->regs->fminterval) & FIT;
 684
 685         /* TODO: adjust FSLargestDataPacket value too? */
 686         admhc_writel(ahcd, (fit ^ FIT) | ahcd->fminterval,
 687                                         &ahcd->regs->fminterval);
 688 #endif
 689 }
 690
 691 static inline u32 admhc_read_rhdesc(struct admhcd *ahcd)
 692 {
 693         return admhc_readl(ahcd, &ahcd->regs->rhdesc);
 694 }
 695
 696 static inline u32 admhc_read_portstatus(struct admhcd *ahcd, int port)
 697 {
 698         return admhc_readl(ahcd, &ahcd->regs->portstatus[port]);
 699 }
 700
 701 static inline void admhc_write_portstatus(struct admhcd *ahcd, int port,
 702                 u32 value)
 703 {
 704         admhc_writel(ahcd, value, &ahcd->regs->portstatus[port]);
 705 }
 706
 707 static inline void roothub_write_status(struct admhcd *ahcd, u32 value)
 708 {
 709         /* FIXME: read-only bits must be masked out */
 710         admhc_writel(ahcd, value, &ahcd->regs->rhdesc);
 711 }
 712
 713 static inline void admhc_intr_disable(struct admhcd *ahcd, u32 ints)
 714 {
 715         u32     t;
 716
 717         t = admhc_readl(ahcd, &ahcd->regs->int_enable);
 718         t &= ~(ints);
 719         admhc_writel(ahcd, t, &ahcd->regs->int_enable);
 720         /* TODO: flush writes ?*/
 721 }
 722
 723 static inline void admhc_intr_enable(struct admhcd *ahcd, u32 ints)
 724 {
 725         u32     t;
 726
 727         t = admhc_readl(ahcd, &ahcd->regs->int_enable);
 728         t |= ints;
 729         admhc_writel(ahcd, t, &ahcd->regs->int_enable);
 730         /* TODO: flush writes ?*/
 731 }
 732
 733 static inline void admhc_intr_ack(struct admhcd *ahcd, u32 ints)
 734 {
 735         admhc_writel(ahcd, ints, &ahcd->regs->int_status);
 736 }
 737
 738 static inline void admhc_dma_enable(struct admhcd *ahcd)
 739 {
 740         u32 t;
 741
 742         t = admhc_readl(ahcd, &ahcd->regs->host_control);
 743         if (t & ADMHC_HC_DMAE)
 744                 return;
 745
 746         t |= ADMHC_HC_DMAE;
 747         admhc_writel(ahcd, t, &ahcd->regs->host_control);
 748         admhc_vdbg(ahcd,"DMA enabled\n");
 749 }
 750
 751 static inline void admhc_dma_disable(struct admhcd *ahcd)
 752 {
 753         u32 t;
 754
 755         t = admhc_readl(ahcd, &ahcd->regs->host_control);
 756         if (!(t & ADMHC_HC_DMAE))
 757                 return;
 758
 759         t &= ~ADMHC_HC_DMAE;
 760         admhc_writel(ahcd, t, &ahcd->regs->host_control);
 761         admhc_vdbg(ahcd,"DMA disabled\n");
 762 }