release/src/include/sbhndpio.h

   1 /*
   2  * Generic Broadcom Home Networking Division (HND) PIO engine HW interface
   3  * This supports the following chips: BCM42xx, 44xx, 47xx .
   4  *
   5  * Copyright 2007, Broadcom Corporation
   6  * All Rights Reserved.
   7  *
   8  * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
   9  * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
  10  * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
  11  * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
  12  * $Id$
  13  */
  14
  15 #ifndef _sbhndpio_h_
  16 #define _sbhndpio_h_
  17
  18 /* PIO structure,
  19  *  support two PIO format: 2 bytes access and 4 bytes access
  20  *  basic FIFO register set is per channel(transmit or receive)
  21  *  a pair of channels is defined for convenience
  22  */
  23
  24 /* 2byte-wide pio register set per channel(xmt or rcv) */
  25 typedef volatile struct {
  26         uint16  fifocontrol;
  27         uint16  fifodata;
  28         uint16  fifofree;       /* only valid in xmt channel, not in rcv channel */
  29         uint16  PAD;
  30 } pio2regs_t;
  31
  32 /* a pair of pio channels(tx and rx) */
  33 typedef volatile struct {
  34         pio2regs_t      tx;
  35         pio2regs_t      rx;
  36 } pio2regp_t;
  37
  38 /* 4byte-wide pio register set per channel(xmt or rcv) */
  39 typedef volatile struct {
  40         uint32  fifocontrol;
  41         uint32  fifodata;
  42 } pio4regs_t;
  43
  44 /* a pair of pio channels(tx and rx) */
  45 typedef volatile struct {
  46         pio4regs_t      tx;
  47         pio4regs_t      rx;
  48 } pio4regp_t;
  49
  50 #endif /* _sbhndpio_h_ */