/usr/include/ddccontrol/ddcpci-ipc.h is in libddccontrol-dev 0.4.2-11.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 | /*
ddc/ci direct PCI memory interface - header file for IPC
Copyright(c) 2004 Nicolas Boichat (nicolas@boichat.ch)
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef DDCPCI_IPC_H
#define DDCPCI_IPC_H
#include "config.h"
#if !HAVE_DDCPCI
#error "This file mustn\'t be included if ddcpci support is disabled."
#endif
//#include <pci/pci.h>
/* If ddcpci receives no connections during IDLE_TIMEOUT seconds, it will break the connection and exit. */
#define IDLE_TIMEOUT 60
struct i2c_bus {
int bus;
int dev;
int func;
int i2cbus;
};
#define MAX_BUFFER_SIZE 256
#define QUERY_SIZE (sizeof(struct query) - (MAX_BUFFER_SIZE) - sizeof(long))
#define ANSWER_SIZE (sizeof(struct answer) - (MAX_BUFFER_SIZE) - sizeof(long))
/* ddccontrol to ddcpci messages (queries) */
#define QUERY_LIST 0 /* Nothing should be defined */
#define QUERY_OPEN 1 /* i2c_bus must be defined */
#define QUERY_DATA 2 /* addr and flags must be defined (and buffer for write operations) */
#define QUERY_HEARTBEAT 3 /* Nothing should be defined */
#define QUERY_QUIT 4 /* Nothing should be defined */
struct query {
long mtype; /* Always 1 */
int qtype; /* see above for possible values */
/* QUERY_OPEN */
struct i2c_bus bus;
/* QUERY_DATA */
int addr;
int flags;
int len; /* only for read queries, number of bytes to read */
unsigned char buffer[MAX_BUFFER_SIZE];
};
/* ddcpci to ddccontrol messages (answers) */
struct answer {
long mtype; /* Always 2 */
int status; /* 0 or greater - OK (bytes read/written for answers to QUERY_DATA), -1 - an error occured */
int last; /* 0 - Last message, no bus to read, 1 - Other messages follows (for QUERY_LIST) */
struct i2c_bus bus; /* For answers to QUERY_LIST */
unsigned char buffer[MAX_BUFFER_SIZE]; /* For answers to QUERY_DATA, read operations */
};
#endif //DDCPCI_IPC_H
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