/*
this two functions are used by i2c slave core to get data by the specific i2c slave device
or send data to it to feed i2c master's need.
@mod: async(1) or sync(0) mode.
*/
int i2c_slave_device_read(i2c_slave_device_t *device, int num, u8 *data)
{
int read_num, read_total = 0;
int step = 1000;
u8 *read_buf = data;
printk(KERN_INFO "%s: device id=%d, num=%d\n", __func__, device->id,
num);
read_num = i2c_slave_rb_consume(device->receive_buffer, num, read_buf);
read_total += read_num;
read_buf += read_num;
step--;
while ((read_total < num) && step) {
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(HZ / 10);
if (!signal_pending(current)) {
} else {
/*TODO*/ break;
}
read_num =
i2c_slave_rb_consume(device->receive_buffer,
num - read_total, read_buf);
num -= read_num;
read_buf += read_num;
step--;
}
return read_total;
}
int i2c_slave_device_consume(i2c_slave_device_t *device, int num, u8 *data)
{
return i2c_slave_rb_consume(device->send_buffer, num, data);
}
