Function out_bit

src/device/software_i2c.c:133–164

}

static int out_bit(unsigned int bus, int bit)
{
	spew("software_i2c(%d): Sending a %d bit... ", bus, bit);

	software_i2c[bus]->set_sda(bus, bit);
	wait(bus);

	if (bit && !software_i2c[bus]->get_sda(bus)) {
		printk(BIOS_ERR, "software_i2c(%d): ERROR: SDA wedged low "
			"by slave before clock pulse on transmit!\n", bus);
		return ERR_WEDGE;
	}

	/* Clock stretching */
	assert(!software_i2c[bus]->get_scl(bus));
	software_i2c[bus]->set_scl(bus, 1);
	if (wait_for_scl(bus, "on transmit"))
		return ERR_TIMEOUT;
	wait(bus);

	if (bit && !software_i2c[bus]->get_sda(bus)) {
		printk(BIOS_ERR, "software_i2c(%d): ERROR: SDA wedged low "
			"by slave after clock pulse on transmit!\n", bus);
		return ERR_WEDGE;
	}

	assert(software_i2c[bus]->get_scl(bus));
	software_i2c[bus]->set_scl(bus, 0);

	spew("%d bit sent!\n", bit);
	return 0;
}

static int in_bit(unsigned int bus)
{