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/*
* Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved.
*/
/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
/*!
* @defgroup Framebuffer Framebuffer Driver for SDC and ADC.
*/
/*!
* @file mxcfb_claa_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/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 @ 55 Hz , pixel clk @ 25MHz */
"CLAA-WVGA", 55, 800, 480, 40000, 40, 40, 5, 5, 20, 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, "DISP3 BG")) {
return 0;
}
switch (val) {
case FB_EVENT_FB_REGISTERED:
lcd_init_fb(event->info);
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 SPI slave device is detected.
*
* @param spi the SPI slave 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, "DISP3 BG") == 0) {
lcd_init_fb(registered_fb[i]);
fb_show_logo(registered_fb[i], 0);
lcd_poweron();
} else if (strcmp(registered_fb[i]->fix.id, "DISP3 FG") == 0) {
lcd_init_fb(registered_fb[i]);
}
}
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 CLAA WVGA
*/
static struct platform_driver lcd_driver = {
.driver = {
.name = "lcd_claa"},
.probe = lcd_probe,
.remove = __devexit_p(lcd_remove),
.suspend = lcd_suspend,
.resume = lcd_resume,
};
/*
* Send Power On commands to L4F00242T03
*
*/
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 commands to L4F00242T03
*
*/
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 claa_lcd_init(void)
{
return platform_driver_register(&lcd_driver);
}
static void __exit claa_lcd_exit(void)
{
platform_driver_unregister(&lcd_driver);
}
module_init(claa_lcd_init);
module_exit(claa_lcd_exit);
MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_DESCRIPTION("CLAA WVGA LCD init driver");
MODULE_LICENSE("GPL");
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