C++ (Cpp) i2c_davinci_wait_for_bb Exemples

Exemple #1

/*
 * Prepare controller for a transaction and call i2c_davinci_xfer_msg

 */
static int
i2c_davinci_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num)
{
	int count;
	int ret = 0;
	char retries = 5;

	DEB1("msgs: %d", num);

	if (num < 1 || num > MAX_MESSAGES)
		return -EINVAL;

	/* Check for valid parameters in messages */
	for (count = 0; count < num; count++)
		if (msgs[count].buf == NULL)
			return -EINVAL;

	if ((ret = i2c_davinci_wait_for_bb(1, adap)) < 0)
		return ret;

	for (count = 0; count < num; count++) {
		DEB1("msg: %d, addr: 0x%04x, len: %d, flags: 0x%x",
		     count, msgs[count].addr, msgs[count].len,
		     msgs[count].flags);

		do {
			ret = i2c_davinci_xfer_msg(adap, &msgs[count],
					   	   (count == (num - 1)));

			if (ret < 0) {
				struct i2c_davinci_device *dev = i2c_get_adapdata(adap);

				DEB1("i2c: retry %d - icstr = 0x%x", 
				      retries, dev->regs->icstr);
				mdelay (1);
				retries--;
			} else
				break;
		} while (retries);

		DEB1("ret: %d", ret);

		if (ret != msgs[count].len)
			break;
	}

	if (ret >= 0 && num >= 1)
		ret = num;

	DEB1("ret: %d", ret);

	return ret;
}

Exemple #2

/*
 * Prepare controller for a transaction and call i2c_davinci_xfer_msg

 */
static int
i2c_davinci_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num)
{
	int count;
	int ret = 0;

	DEB1("msgs: %d", num);

	if (num < 1 || num > MAX_MESSAGES)
		return -EINVAL;

	/* Check for valid parameters in messages */
	for (count = 0; count < num; count++)
		if (msgs[count].buf == NULL)
			return -EINVAL;

	if ((ret = i2c_davinci_wait_for_bb(1)) < 0)
		return ret;

	for (count = 0; count < num; count++) {
		DEB1("msg: %d, addr: 0x%04x, len: %d, flags: 0x%x",
		     count, msgs[count].addr, msgs[count].len,
		     msgs[count].flags);

		ret =
		    i2c_davinci_xfer_msg(adap, &msgs[count],
					 (count == (num - 1)));

		DEB1("ret: %d", ret);

		if (ret != msgs[count].len)
			break;
	}

	if (ret >= 0 && num > 1)
		ret = num;

	DEB1("ret xfer: %d", ret);

	return ret;
}