src/dev/bus/adb.h

   1 /*
   2  * ADB bus definitions for Open Hack'Ware
   3  *
   4  * Copyright (c) 2004-2005 Jocelyn Mayer
   5  *
   6  *   This program is free software; you can redistribute it and/or
   7  *   modify it under the terms of the GNU General Public License V2
   8  *   as published by the Free Software Foundation
   9  *
  10  *   This program is distributed in the hope that it will be useful,
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *   GNU General Public License for more details.
  14  *
  15  *   You should have received a copy of the GNU General Public License
  16  *   along with this program; if not, write to the Free Software
  17  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  */
  19
  20 #if !defined(__OHW_ADB_H__)
  21 #define __OHW_ADB_H__
  22
  23 typedef struct adb_bus_t adb_bus_t;
  24 typedef struct adb_dev_t adb_dev_t;
  25
  26 #define ADB_BUF_SIZE 8
  27 struct adb_bus_t {
  28     void *host;
  29     int (*req)(void *host, const uint8_t *snd_buf, int len, uint8_t *rcv_buf);
  30     adb_dev_t *devices;
  31 };
  32
  33 struct adb_dev_t {
  34     adb_dev_t *next;
  35     adb_bus_t *bus;
  36     uint8_t addr;
  37     uint8_t type;
  38     uint32_t state;
  39 };
  40
  41 #define ADB_BUF_SIZE 8
  42
  43 /* ADB commands */
  44 enum {
  45     ADB_SEND_RESET = 0x00,
  46     ADB_FLUSH      = 0x01,
  47     ADB_LISTEN     = 0x08,
  48     ADB_TALK       = 0x0C,
  49 };
  50 /* ADB default IDs before relocation */
  51 enum {
  52     ADB_PROTECT    = 0x01,
  53     ADB_KEYBD      = 0x02,
  54     ADB_MOUSE      = 0x03,
  55     ADB_ABS        = 0x04,
  56     ADB_MODEM      = 0x05,
  57     ADB_RES        = 0x06,
  58     ADB_MISC       = 0x07,
  59 };
  60 /* ADB special device handlers IDs */
  61 enum {
  62     ADB_CHADDR        = 0x00,
  63     ADB_CHADDR_ACTIV  = 0xFD,
  64     ADB_CHADDR_NOCOLL = 0xFE,
  65     ADB_SELF_TEST     = 0xFF,
  66 };
  67
  68 int adb_cmd (adb_dev_t *dev, uint8_t cmd, uint8_t reg,
  69              uint8_t *buf, int len);
  70 void adb_bus_reset (adb_bus_t *bus);
  71 adb_bus_t *adb_bus_new (void *host,
  72                         int (*req)(void *host, const uint8_t *snd_buf,
  73                                    int len, uint8_t *rcv_buf));
  74 int adb_bus_init (adb_bus_t *bus);
  75
  76 static inline int adb_reset (adb_bus_t *bus)
  77 {
  78     adb_dev_t fake_device;
  79
  80     memset(&fake_device, 0, sizeof(adb_dev_t));
  81     fake_device.bus = bus;
  82
  83     return adb_cmd(&fake_device, ADB_SEND_RESET, 0, NULL, 0);
  84 }
  85
  86 static inline int adb_flush (adb_dev_t *dev)
  87 {
  88     return adb_cmd(dev, ADB_FLUSH, 0, NULL, 0);
  89 }
  90
  91 static inline int adb_reg_get (adb_dev_t *dev, uint8_t reg, uint8_t *buf)
  92 {
  93     return adb_cmd(dev, ADB_TALK, reg, buf, 0);
  94 }
  95
  96 static inline int adb_reg_set (adb_dev_t *dev, uint8_t reg,
  97                                uint8_t *buf, int len)
  98 {
  99     return adb_cmd(dev, ADB_LISTEN, reg, buf, len);
 100 }
 101
 102 #endif /* !defined(__OHW_ADB_H__) */