| /* |
| * (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., 59 Temple Place, Suite 330, Boston, |
| * MA 02111-1307 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); |
| } |
| |