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/*
* (C) Copyright 2002
* Humboldt Solutions Ltd, <adrian@humboldt.co.uk>
*
* 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., 51 Franklin St, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include "i2c.h"
static i2c_bus *first_i2c = NULL;
#if 0
int register_i2c_bus(const i2c_fn *fn, char *tag, void *data)
{
i2c_bus *bus = malloc (sizeof (i2c_bus));
if (bus)
{
bus->fn = fn;
bus->tag = tag;
bus->data = data;
bus->next = first_i2c;
first_i2c = bus;
return 0;
}
return -1;
}
#endif
i2c_bus *find_i2c_bus(const char *name)
{
int len;
if (! name)
return first_i2c;
if (first_i2c)
{
i2c_bus *i2c;
len = strlen(name);
for (i2c = first_i2c; i2c; i2c = i2c->next)
if (strlen(i2c->tag) == len && memcmp (name, i2c->tag, len) == 0)
return i2c;
}
return NULL;
}
void i2c_start(struct i2c_bus *bus)
{
if (! bus)
bus = first_i2c;
bus->fn->start(bus);
}
void i2c_stop(struct i2c_bus *bus)
{
if (! bus)
bus = first_i2c;
bus->fn->stop(bus);
}
int i2c_master_write(struct i2c_bus *bus, int target, int address,
const uint8_t *data, int length)
{
if (! bus)
bus = first_i2c;
return bus->fn->master_write(bus, target, address, data, length);
}
int i2c_master_read(struct i2c_bus *bus, int target, int address,
uint8_t *data, int length)
{
if (! bus)
bus = first_i2c;
return bus->fn->master_read(bus, target, address, data, length);
}
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