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/*
* Copyright (C) 2010 Freescale Semiconductor, Inc. All Rights Reserved.
*/
/*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*!
* @defgroup Framebuffer Framebuffer Driver for SDC and ADC.
*/
/*!
* @file mxcfb_seiko_wvga.c
*
* @brief MXC Frame buffer driver for SDC
*
* @ingroup Framebuffer
*/
/*!
* Include files
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/fb.h>
#include <linux/fsl_devices.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/mxcfb.h>
#include <linux/regulator/consumer.h>
#include <mach/hardware.h>
static void lcd_poweron(void);
static void lcd_poweroff(void);
static struct platform_device *plcd_dev;
static struct regulator *io_reg;
static struct regulator *core_reg;
static int lcd_on;
static struct fb_videomode video_modes[] = {
{
/* 800x480 @ 57 Hz , pixel clk @ 32MHz */
"SEIKO-WVGA", 60, 800, 480, 29850, 99, 164, 33, 10, 10, 10,
FB_SYNC_CLK_LAT_FALL,
FB_VMODE_NONINTERLACED,
0,},
};
static void lcd_init_fb(struct fb_info *info)
{
struct fb_var_screeninfo var;
memset(&var, 0, sizeof(var));
fb_videomode_to_var(&var, &video_modes[0]);
var.activate = FB_ACTIVATE_ALL;
var.yres_virtual = var.yres * 3;
acquire_console_sem();
info->flags |= FBINFO_MISC_USEREVENT;
fb_set_var(info, &var);
info->flags &= ~FBINFO_MISC_USEREVENT;
release_console_sem();
}
static int lcd_fb_event(struct notifier_block *nb, unsigned long val, void *v)
{
struct fb_event *event = v;
if (strcmp(event->info->fix.id, "mxc_elcdif_fb"))
return 0;
switch (val) {
case FB_EVENT_FB_REGISTERED:
lcd_init_fb(event->info);
fb_show_logo(event->info, 0);
lcd_poweron();
break;
case FB_EVENT_BLANK:
if ((event->info->var.xres != 800) ||
(event->info->var.yres != 480)) {
break;
}
if (*((int *)event->data) == FB_BLANK_UNBLANK)
lcd_poweron();
else
lcd_poweroff();
break;
}
return 0;
}
static struct notifier_block nb = {
.notifier_call = lcd_fb_event,
};
/*!
* This function is called whenever the platform device is detected.
*
* @param pdev the platform device
*
* @return Returns 0 on SUCCESS and error on FAILURE.
*/
static int __devinit lcd_probe(struct platform_device *pdev)
{
int i;
struct mxc_lcd_platform_data *plat = pdev->dev.platform_data;
if (plat) {
if (plat->reset)
plat->reset();
io_reg = regulator_get(&pdev->dev, plat->io_reg);
if (IS_ERR(io_reg))
io_reg = NULL;
core_reg = regulator_get(&pdev->dev, plat->core_reg);
if (!IS_ERR(core_reg))
regulator_set_voltage(io_reg, 1800000, 1800000);
else
core_reg = NULL;
}
for (i = 0; i < num_registered_fb; i++) {
if (strcmp(registered_fb[i]->fix.id, "mxc_elcdif_fb") == 0) {
lcd_init_fb(registered_fb[i]);
fb_show_logo(registered_fb[i], 0);
lcd_poweron();
}
}
fb_register_client(&nb);
plcd_dev = pdev;
return 0;
}
static int __devexit lcd_remove(struct platform_device *pdev)
{
fb_unregister_client(&nb);
lcd_poweroff();
if (io_reg)
regulator_put(io_reg);
if (core_reg)
regulator_put(core_reg);
return 0;
}
#ifdef CONFIG_PM
static int lcd_suspend(struct platform_device *pdev, pm_message_t state)
{
return 0;
}
static int lcd_resume(struct platform_device *pdev)
{
return 0;
}
#else
#define lcd_suspend NULL
#define lcd_resume NULL
#endif
/*!
* platform driver structure for SEIKO WVGA
*/
static struct platform_driver lcd_driver = {
.driver = {
.name = "lcd_seiko"},
.probe = lcd_probe,
.remove = __devexit_p(lcd_remove),
.suspend = lcd_suspend,
.resume = lcd_resume,
};
/*
* Send Power
*
*/
static void lcd_poweron(void)
{
if (lcd_on)
return;
dev_dbg(&plcd_dev->dev, "turning on LCD\n");
if (core_reg)
regulator_enable(core_reg);
if (io_reg)
regulator_enable(io_reg);
lcd_on = 1;
}
/*
* Send Power Off
*
*/
static void lcd_poweroff(void)
{
lcd_on = 0;
dev_dbg(&plcd_dev->dev, "turning off LCD\n");
if (io_reg)
regulator_disable(io_reg);
if (core_reg)
regulator_disable(core_reg);
}
static int __init seiko_wvga_lcd_init(void)
{
return platform_driver_register(&lcd_driver);
}
static void __exit seiko_wvga_lcd_exit(void)
{
platform_driver_unregister(&lcd_driver);
}
module_init(seiko_wvga_lcd_init);
module_exit(seiko_wvga_lcd_exit);
MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_DESCRIPTION("SEIKO WVGA LCD init driver");
MODULE_LICENSE("GPL");
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