src/drivers/board/foster/panel.c

/*
 * Copyright 2016 Google Inc.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but without any warranty; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <stdint.h>

#include "base/container_of.h"
#include "base/xalloc.h"
#include "drivers/board/foster/panel.h"

static int foster_panel_enable(MonitorOps *me)
{
	FosterPanel *panel = container_of(me, FosterPanel, ops);

	return  // Brightness mode: BRTHI/BRTLO.
		i2c_write8(panel->i2c, panel->chip, 0x10, 0x01) ||
		// maxcurrent: 20ma.
		i2c_write8(panel->i2c, panel->chip, 0x11, 0x05) ||
		// ov: 2v, all 6 current sinks enabled.
		i2c_write8(panel->i2c, panel->chip, 0x14, 0x7f) ||
		// Backlight on.
		i2c_write8(panel->i2c, panel->chip, 0x00, 0x01) ||
		// Brightness: BRT[11:4]  0x000: 0%, 0xFFF: 100%
		i2c_write8(panel->i2c, panel->chip, 0x04, 0x55);
}

static int foster_panel_disable(MonitorOps *me)
{
	FosterPanel *panel = container_of(me, FosterPanel, ops);

	// Backlight off.
	return i2c_write8(panel->i2c, panel->chip, 0x00, 0x00);
}

FosterPanel *new_foster_panel(I2cOps *i2c, uint8_t chip)
{
	FosterPanel *panel = xzalloc(sizeof(*panel));

	panel->ops.enable = &foster_panel_enable;
	panel->ops.disable = &foster_panel_disable;

	panel->i2c = i2c;
	panel->chip = chip;

	return panel;
}