arch/ppc/cpu/mpc5xxx/usb_ohci.h

   1 /*
   2  * URB OHCI HCD (Host Controller Driver) for USB.
   3  *
   4  * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
   5  * (C) Copyright 2000-2001 David Brownell <dbrownell@users.sourceforge.net>
   6  *
   7  * usb-ohci.h
   8  */
   9
  10
  11 static int cc_to_error[16] = {
  12
  13 /* mapping of the OHCI CC status to error codes */
  14         /* No  Error  */               0,
  15         /* CRC Error  */               USB_ST_CRC_ERR,
  16         /* Bit Stuff  */               USB_ST_BIT_ERR,
  17         /* Data Togg  */               USB_ST_CRC_ERR,
  18         /* Stall      */               USB_ST_STALLED,
  19         /* DevNotResp */               -1,
  20         /* PIDCheck   */               USB_ST_BIT_ERR,
  21         /* UnExpPID   */               USB_ST_BIT_ERR,
  22         /* DataOver   */               USB_ST_BUF_ERR,
  23         /* DataUnder  */               USB_ST_BUF_ERR,
  24         /* reservd    */               -1,
  25         /* reservd    */               -1,
  26         /* BufferOver */               USB_ST_BUF_ERR,
  27         /* BuffUnder  */               USB_ST_BUF_ERR,
  28         /* Not Access */               -1,
  29         /* Not Access */               -1
  30 };
  31
  32 /* ED States */
  33
  34 #define ED_NEW          0x00
  35 #define ED_UNLINK       0x01
  36 #define ED_OPER         0x02
  37 #define ED_DEL          0x04
  38 #define ED_URB_DEL      0x08
  39
  40 /* usb_ohci_ed */
  41 struct ed {
  42         __u32 hwINFO;
  43         __u32 hwTailP;
  44         __u32 hwHeadP;
  45         __u32 hwNextED;
  46
  47         struct ed *ed_prev;
  48         __u8 int_period;
  49         __u8 int_branch;
  50         __u8 int_load;
  51         __u8 int_interval;
  52         __u8 state;
  53         __u8 type;
  54         __u16 last_iso;
  55         struct ed *ed_rm_list;
  56
  57         struct usb_device *usb_dev;
  58         __u32 unused[3];
  59 } __attribute__((aligned(16)));
  60 typedef struct ed ed_t;
  61
  62
  63 /* TD info field */
  64 #define TD_CC       0xf0000000
  65 #define TD_CC_GET(td_p) ((td_p >>28) & 0x0f)
  66 #define TD_CC_SET(td_p, cc) (td_p) = ((td_p) & 0x0fffffff) | (((cc) & 0x0f) << 28)
  67 #define TD_EC       0x0C000000
  68 #define TD_T        0x03000000
  69 #define TD_T_DATA0  0x02000000
  70 #define TD_T_DATA1  0x03000000
  71 #define TD_T_TOGGLE 0x00000000
  72 #define TD_R        0x00040000
  73 #define TD_DI       0x00E00000
  74 #define TD_DI_SET(X) (((X) & 0x07)<< 21)
  75 #define TD_DP       0x00180000
  76 #define TD_DP_SETUP 0x00000000
  77 #define TD_DP_IN    0x00100000
  78 #define TD_DP_OUT   0x00080000
  79
  80 #define TD_ISO      0x00010000
  81 #define TD_DEL      0x00020000
  82
  83 /* CC Codes */
  84 #define TD_CC_NOERROR      0x00
  85 #define TD_CC_CRC          0x01
  86 #define TD_CC_BITSTUFFING  0x02
  87 #define TD_CC_DATATOGGLEM  0x03
  88 #define TD_CC_STALL        0x04
  89 #define TD_DEVNOTRESP      0x05
  90 #define TD_PIDCHECKFAIL    0x06
  91 #define TD_UNEXPECTEDPID   0x07
  92 #define TD_DATAOVERRUN     0x08
  93 #define TD_DATAUNDERRUN    0x09
  94 #define TD_BUFFEROVERRUN   0x0C
  95 #define TD_BUFFERUNDERRUN  0x0D
  96 #define TD_NOTACCESSED     0x0F
  97
  98
  99 #define MAXPSW 1
 100
 101 struct td {
 102         __u32 hwINFO;
 103         __u32 hwCBP;            /* Current Buffer Pointer */
 104         __u32 hwNextTD;         /* Next TD Pointer */
 105         __u32 hwBE;             /* Memory Buffer End Pointer */
 106
 107         __u8 unused;
 108         __u8 index;
 109         struct ed *ed;
 110         struct td *next_dl_td;
 111         struct usb_device *usb_dev;
 112         int transfer_len;
 113         __u32 data;
 114
 115         __u32 unused2[2];
 116 } __attribute__((aligned(32)));
 117 typedef struct td td_t;
 118
 119 #define OHCI_ED_SKIP    (1 << 14)
 120
 121 /*
 122  * The HCCA (Host Controller Communications Area) is a 256 byte
 123  * structure defined in the OHCI spec. that the host controller is
 124  * told the base address of.  It must be 256-byte aligned.
 125  */
 126
 127 #define NUM_INTS 32     /* part of the OHCI standard */
 128 struct ohci_hcca {
 129         __u32   int_table[NUM_INTS];    /* Interrupt ED table */
 130         __u16   pad1;                   /* set to 0 on each frame_no change */
 131         __u16   frame_no;               /* current frame number */
 132         __u32   done_head;              /* info returned for an interrupt */
 133         u8              reserved_for_hc[116];
 134 } __attribute__((aligned(256)));
 135
 136
 137 /*
 138  * Maximum number of root hub ports.
 139  */
 140 #define MAX_ROOT_PORTS  15      /* maximum OHCI root hub ports */
 141
 142 /*
 143  * This is the structure of the OHCI controller's memory mapped I/O
 144  * region.  This is Memory Mapped I/O.  You must use the readl() and
 145  * writel() macros defined in asm/io.h to access these!!
 146  */
 147 struct ohci_regs {
 148         /* control and status registers */
 149         __u32   revision;
 150         __u32   control;
 151         __u32   cmdstatus;
 152         __u32   intrstatus;
 153         __u32   intrenable;
 154         __u32   intrdisable;
 155         /* memory pointers */
 156         __u32   hcca;
 157         __u32   ed_periodcurrent;
 158         __u32   ed_controlhead;
 159         __u32   ed_controlcurrent;
 160         __u32   ed_bulkhead;
 161         __u32   ed_bulkcurrent;
 162         __u32   donehead;
 163         /* frame counters */
 164         __u32   fminterval;
 165         __u32   fmremaining;
 166         __u32   fmnumber;
 167         __u32   periodicstart;
 168         __u32   lsthresh;
 169         /* Root hub ports */
 170         struct  ohci_roothub_regs {
 171                 __u32   a;
 172                 __u32   b;
 173                 __u32   status;
 174                 __u32   portstatus[MAX_ROOT_PORTS];
 175         } roothub;
 176 } __attribute__((aligned(32)));
 177
 178
 179 /* OHCI CONTROL AND STATUS REGISTER MASKS */
 180
 181 /*
 182  * HcControl (control) register masks
 183  */
 184 #define OHCI_CTRL_CBSR  (3 << 0)        /* control/bulk service ratio */
 185 #define OHCI_CTRL_PLE   (1 << 2)        /* periodic list enable */
 186 #define OHCI_CTRL_IE    (1 << 3)        /* isochronous enable */
 187 #define OHCI_CTRL_CLE   (1 << 4)        /* control list enable */
 188 #define OHCI_CTRL_BLE   (1 << 5)        /* bulk list enable */
 189 #define OHCI_CTRL_HCFS  (3 << 6)        /* host controller functional state */
 190 #define OHCI_CTRL_IR    (1 << 8)        /* interrupt routing */
 191 #define OHCI_CTRL_RWC   (1 << 9)        /* remote wakeup connected */
 192 #define OHCI_CTRL_RWE   (1 << 10)       /* remote wakeup enable */
 193
 194 /* pre-shifted values for HCFS */
 195 #       define OHCI_USB_RESET   (0 << 6)
 196 #       define OHCI_USB_RESUME  (1 << 6)
 197 #       define OHCI_USB_OPER    (2 << 6)
 198 #       define OHCI_USB_SUSPEND (3 << 6)
 199
 200 /*
 201  * HcCommandStatus (cmdstatus) register masks
 202  */
 203 #define OHCI_HCR        (1 << 0)        /* host controller reset */
 204 #define OHCI_CLF        (1 << 1)        /* control list filled */
 205 #define OHCI_BLF        (1 << 2)        /* bulk list filled */
 206 #define OHCI_OCR        (1 << 3)        /* ownership change request */
 207 #define OHCI_SOC        (3 << 16)       /* scheduling overrun count */
 208
 209 /*
 210  * masks used with interrupt registers:
 211  * HcInterruptStatus (intrstatus)
 212  * HcInterruptEnable (intrenable)
 213  * HcInterruptDisable (intrdisable)
 214  */
 215 #define OHCI_INTR_SO    (1 << 0)        /* scheduling overrun */
 216 #define OHCI_INTR_WDH   (1 << 1)        /* writeback of done_head */
 217 #define OHCI_INTR_SF    (1 << 2)        /* start frame */
 218 #define OHCI_INTR_RD    (1 << 3)        /* resume detect */
 219 #define OHCI_INTR_UE    (1 << 4)        /* unrecoverable error */
 220 #define OHCI_INTR_FNO   (1 << 5)        /* frame number overflow */
 221 #define OHCI_INTR_RHSC  (1 << 6)        /* root hub status change */
 222 #define OHCI_INTR_OC    (1 << 30)       /* ownership change */
 223 #define OHCI_INTR_MIE   (1 << 31)       /* master interrupt enable */
 224
 225
 226 /* Virtual Root HUB */
 227 struct virt_root_hub {
 228         int devnum; /* Address of Root Hub endpoint */
 229         void *dev;  /* was urb */
 230         void *int_addr;
 231         int send;
 232         int interval;
 233 };
 234
 235 /* USB HUB CONSTANTS (not OHCI-specific; see hub.h) */
 236
 237 /* destination of request */
 238 #define RH_INTERFACE               0x01
 239 #define RH_ENDPOINT                0x02
 240 #define RH_OTHER                   0x03
 241
 242 #define RH_CLASS                   0x20
 243 #define RH_VENDOR                  0x40
 244
 245 /* Requests: bRequest << 8 | bmRequestType */
 246 #define RH_GET_STATUS           0x0080
 247 #define RH_CLEAR_FEATURE        0x0100
 248 #define RH_SET_FEATURE          0x0300
 249 #define RH_SET_ADDRESS          0x0500
 250 #define RH_GET_DESCRIPTOR       0x0680
 251 #define RH_SET_DESCRIPTOR       0x0700
 252 #define RH_GET_CONFIGURATION    0x0880
 253 #define RH_SET_CONFIGURATION    0x0900
 254 #define RH_GET_STATE            0x0280
 255 #define RH_GET_INTERFACE        0x0A80
 256 #define RH_SET_INTERFACE        0x0B00
 257 #define RH_SYNC_FRAME           0x0C80
 258 /* Our Vendor Specific Request */
 259 #define RH_SET_EP               0x2000
 260
 261
 262 /* Hub port features */
 263 #define RH_PORT_CONNECTION         0x00
 264 #define RH_PORT_ENABLE             0x01
 265 #define RH_PORT_SUSPEND            0x02
 266 #define RH_PORT_OVER_CURRENT       0x03
 267 #define RH_PORT_RESET              0x04
 268 #define RH_PORT_POWER              0x08
 269 #define RH_PORT_LOW_SPEED          0x09
 270
 271 #define RH_C_PORT_CONNECTION       0x10
 272 #define RH_C_PORT_ENABLE           0x11
 273 #define RH_C_PORT_SUSPEND          0x12
 274 #define RH_C_PORT_OVER_CURRENT     0x13
 275 #define RH_C_PORT_RESET            0x14
 276
 277 /* Hub features */
 278 #define RH_C_HUB_LOCAL_POWER       0x00
 279 #define RH_C_HUB_OVER_CURRENT      0x01
 280
 281 #define RH_DEVICE_REMOTE_WAKEUP    0x00
 282 #define RH_ENDPOINT_STALL          0x01
 283
 284 #define RH_ACK                     0x01
 285 #define RH_REQ_ERR                 -1
 286 #define RH_NACK                    0x00
 287
 288
 289 /* OHCI ROOT HUB REGISTER MASKS */
 290
 291 /* roothub.portstatus [i] bits */
 292 #define RH_PS_CCS            0x00000001         /* current connect status */
 293 #define RH_PS_PES            0x00000002         /* port enable status*/
 294 #define RH_PS_PSS            0x00000004         /* port suspend status */
 295 #define RH_PS_POCI           0x00000008         /* port over current indicator */
 296 #define RH_PS_PRS            0x00000010         /* port reset status */
 297 #define RH_PS_PPS            0x00000100         /* port power status */
 298 #define RH_PS_LSDA           0x00000200         /* low speed device attached */
 299 #define RH_PS_CSC            0x00010000         /* connect status change */
 300 #define RH_PS_PESC           0x00020000         /* port enable status change */
 301 #define RH_PS_PSSC           0x00040000         /* port suspend status change */
 302 #define RH_PS_OCIC           0x00080000         /* over current indicator change */
 303 #define RH_PS_PRSC           0x00100000         /* port reset status change */
 304
 305 /* roothub.status bits */
 306 #define RH_HS_LPS            0x00000001         /* local power status */
 307 #define RH_HS_OCI            0x00000002         /* over current indicator */
 308 #define RH_HS_DRWE           0x00008000         /* device remote wakeup enable */
 309 #define RH_HS_LPSC           0x00010000         /* local power status change */
 310 #define RH_HS_OCIC           0x00020000         /* over current indicator change */
 311 #define RH_HS_CRWE           0x80000000         /* clear remote wakeup enable */
 312
 313 /* roothub.b masks */
 314 #define RH_B_DR         0x0000ffff              /* device removable flags */
 315 #define RH_B_PPCM       0xffff0000              /* port power control mask */
 316
 317 /* roothub.a masks */
 318 #define RH_A_NDP        (0xff << 0)             /* number of downstream ports */
 319 #define RH_A_PSM        (1 << 8)                /* power switching mode */
 320 #define RH_A_NPS        (1 << 9)                /* no power switching */
 321 #define RH_A_DT         (1 << 10)               /* device type (mbz) */
 322 #define RH_A_OCPM       (1 << 11)               /* over current protection mode */
 323 #define RH_A_NOCP       (1 << 12)               /* no over current protection */
 324 #define RH_A_POTPGT     (0xff << 24)            /* power on to power good time */
 325
 326 /* urb */
 327 #define N_URB_TD 48
 328 typedef struct
 329 {
 330         ed_t *ed;
 331         __u16 length;   /* number of tds associated with this request */
 332         __u16 td_cnt;   /* number of tds already serviced */
 333         int   state;
 334         unsigned long pipe;
 335         int actual_length;
 336         td_t *td[N_URB_TD];     /* list pointer to all corresponding TDs associated with this request */
 337 } urb_priv_t;
 338 #define URB_DEL 1
 339
 340 /*
 341  * This is the full ohci controller description
 342  *
 343  * Note how the "proper" USB information is just
 344  * a subset of what the full implementation needs. (Linus)
 345  */
 346
 347
 348 typedef struct ohci {
 349         struct ohci_hcca *hcca;         /* hcca */
 350         /*dma_addr_t hcca_dma;*/
 351
 352         int irq;
 353         int disabled;                   /* e.g. got a UE, we're hung */
 354         int sleeping;
 355         unsigned long flags;            /* for HC bugs */
 356
 357         struct ohci_regs *regs; /* OHCI controller's memory */
 358
 359         ed_t *ed_rm_list[2];     /* lists of all endpoints to be removed */
 360         ed_t *ed_bulktail;       /* last endpoint of bulk list */
 361         ed_t *ed_controltail;    /* last endpoint of control list */
 362         int intrstatus;
 363         __u32 hc_control;               /* copy of the hc control reg */
 364         struct usb_device *dev[32];
 365         struct virt_root_hub rh;
 366
 367         const char      *slot_name;
 368 } ohci_t;
 369
 370 #define NUM_EDS 8               /* num of preallocated endpoint descriptors */
 371
 372 struct ohci_device {
 373         ed_t    ed[NUM_EDS];
 374         int ed_cnt;
 375 };
 376
 377 /* hcd */
 378 /* endpoint */
 379 static int ep_link(ohci_t * ohci, ed_t * ed);
 380 static int ep_unlink(ohci_t * ohci, ed_t * ed);
 381 static ed_t * ep_add_ed(struct usb_device * usb_dev, unsigned long pipe);
 382
 383 /*-------------------------------------------------------------------------*/
 384
 385 /* we need more TDs than EDs */
 386 #define NUM_TD 64
 387
 388 /* +1 so we can align the storage */
 389 td_t gtd[NUM_TD+1];
 390 /* pointers to aligned storage */
 391 td_t *ptd;
 392
 393 /* TDs ... */
 394 static inline struct td *
 395 td_alloc (struct usb_device *usb_dev)
 396 {
 397         int i;
 398         struct td       *td;
 399
 400         td = NULL;
 401         for (i = 0; i < NUM_TD; i++)
 402         {
 403                 if (ptd[i].usb_dev == NULL)
 404                 {
 405                         td = &ptd[i];
 406                         td->usb_dev = usb_dev;
 407                         break;
 408                 }
 409         }
 410
 411         return td;
 412 }
 413
 414 static inline void
 415 ed_free (struct ed *ed)
 416 {
 417         ed->usb_dev = NULL;
 418 }