Exemple #1
0
static int hdpvr_transfer(struct i2c_adapter *i2c_adapter, struct i2c_msg *msgs,
			  int num)
{
	struct hdpvr_device *dev = i2c_get_adapdata(i2c_adapter);
	int retval = 0, i, addr;

	if (num <= 0)
		return 0;

	mutex_lock(&dev->i2c_mutex);

	for (i = 0; i < num && !retval; i++) {
		addr = msgs[i].addr << 1;

		if (msgs[i].flags & I2C_M_RD)
			retval = hdpvr_i2c_read(dev, 1, addr, msgs[i].buf,
						msgs[i].len);
		else
			retval = hdpvr_i2c_write(dev, 1, addr, msgs[i].buf,
						 msgs[i].len);
	}

	mutex_unlock(&dev->i2c_mutex);

	return retval ? retval : num;
}
Exemple #2
0
static int hdpvr_activate_ir(struct hdpvr_device *dev)
{
	char buffer[2];

	mutex_lock(&dev->i2c_mutex);

	hdpvr_i2c_read(dev, 0, 0x54, NULL, 0, buffer, 1);

	buffer[0] = 0;
	buffer[1] = 0x8;
	hdpvr_i2c_write(dev, 1, 0x54, buffer, 2);

	buffer[1] = 0x18;
	hdpvr_i2c_write(dev, 1, 0x54, buffer, 2);

	mutex_unlock(&dev->i2c_mutex);

	return 0;
}
Exemple #3
0
static int hdpvr_transfer(struct i2c_adapter *i2c_adapter, struct i2c_msg *msgs,
			  int num)
{
	struct hdpvr_device *dev = i2c_get_adapdata(i2c_adapter);
	int retval = 0, addr;

	if (num <= 0)
		return 0;

	mutex_lock(&dev->i2c_mutex);

	addr = msgs[0].addr << 1;

	if (num == 1) {
		if (msgs[0].flags & I2C_M_RD)
			retval = hdpvr_i2c_read(dev, 1, addr, NULL, 0,
						msgs[0].buf, msgs[0].len);
		else
			retval = hdpvr_i2c_write(dev, 1, addr, msgs[0].buf,
						 msgs[0].len);
	} else if (num == 2) {
		if (msgs[0].addr != msgs[1].addr) {
			v4l2_warn(&dev->v4l2_dev, "refusing 2-phase i2c xfer "
				  "with conflicting target addresses\n");
			retval = -EINVAL;
			goto out;
		}

		if ((msgs[0].flags & I2C_M_RD) || !(msgs[1].flags & I2C_M_RD)) {
			v4l2_warn(&dev->v4l2_dev, "refusing complex xfer with "
				  "r0=%d, r1=%d\n", msgs[0].flags & I2C_M_RD,
				  msgs[1].flags & I2C_M_RD);
			retval = -EINVAL;
			goto out;
		}

		/*
		 * Write followed by atomic read is the only complex xfer that
		 * we actually support here.
		 */
		retval = hdpvr_i2c_read(dev, 1, addr, msgs[0].buf, msgs[0].len,
					msgs[1].buf, msgs[1].len);
	} else {
		v4l2_warn(&dev->v4l2_dev, "refusing %d-phase i2c xfer\n", num);
	}

out:
	mutex_unlock(&dev->i2c_mutex);

	return retval ? retval : num;
}