Subversion Repositories freemyipod

Rev

Details | Last modification | View Log | RSS feed

Rev Author Line No. Line
881 theseven 1 
#include "global.h"
2 
#include "protocol/i2c/i2c.h"
3 
 
4 
enum i2c_result i2c_init(const struct i2c_driver_instance* instance)
5 
{
6 
    if (!instance) return I2C_RESULT_BAD_OBJECT;
7 
    return instance->driver->init(instance);
8 
}
9 
 
10 
enum i2c_result i2c_txn(const struct i2c_driver_instance* instance, const struct i2c_transaction* transaction)
11 
{
12 
    if (!instance) return I2C_RESULT_BAD_OBJECT;
13 
    return instance->driver->txn(instance, transaction);
14 
}
15 
 
16 
enum i2c_result i2c_read_regs(const struct i2c_driver_instance* instance, int address, int reg, void* buf, int len)
17 
{
18 
    if (!instance) return I2C_RESULT_BAD_OBJECT;
19 
    if (reg < 0 || reg > 255) return I2C_RESULT_INVALID_ARGUMENT;
20 
    struct __attribute__((packed,aligned(4)))
21 
    {
22 
        struct i2c_transaction info;
23 
        struct i2c_transfer transfers[2];
24 
    } txn =
25 
    {
26 
        .info.address = address,
27 
        .info.transfercount = 2,
28 
        .transfers =
29 
        {
30 
            { .type = I2C_TRANSFER_TYPE_TX, .len = 1, .txbuf = &reg },
31 
            { .type = I2C_TRANSFER_TYPE_RX, .len = len, .txbuf = buf },
32 
        },
33 
    };
34 
    return i2c_txn(instance, &txn.info);
35 
}
36 
 
37 
enum i2c_result i2c_write_regs(const struct i2c_driver_instance* instance, int address, int reg, const void* buf, int len)
38 
{
39 
    if (!instance) return I2C_RESULT_BAD_OBJECT;
40 
    if (reg < 0 || reg > 255) return I2C_RESULT_INVALID_ARGUMENT;
41 
    struct __attribute__((packed,aligned(4)))
42 
    {
43 
        struct i2c_transaction info;
44 
        struct i2c_transfer transfers[2];
45 
    } txn =
46 
    {
47 
        .info.address = address,
48 
        .info.transfercount = 2,
49 
        .transfers =
50 
        {
51 
            { .type = I2C_TRANSFER_TYPE_TX, .len = 1, .txbuf = &reg },
52 
            { .type = I2C_TRANSFER_TYPE_CONT, .len = len, .txbuf = buf },
53 
        },
54 
    };
55 
    return i2c_txn(instance, &txn.info);
56 
}