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/*
* Copyright 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved
* Copyright 2010 Digi International, 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
*/
#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 <mach/hardware.h>
#include <mach/mxc.h>
#define MAX_DISPLAYS 2
#define DISP0_ID "DISP3 BG"
#define DISP1_ID "DISP3 BG - DI1"
static void lcd_poweron(struct ccwmx51_lcd_pdata *plat);
static void lcd_poweroff(struct ccwmx51_lcd_pdata *plat);
static struct platform_device *plcd_dev[MAX_DISPLAYS] = {NULL, NULL};
static int lcd_get_index(struct fb_info *info)
{
if (!strcmp(info->fix.id, DISP0_ID))
return 0;
else if (!strcmp(info->fix.id, DISP1_ID))
return 1;
return -1;
}
static void lcd_init_fb(struct fb_info *info)
{
struct fb_var_screeninfo var;
struct ccwmx51_lcd_pdata *plat;
int i = lcd_get_index(info);
if (i < 0)
return;
plat = plcd_dev[i]->dev.platform_data;
memset(&var, 0, sizeof(var));
fb_videomode_to_var(&var, plat->fb_pdata.mode);
var.activate = FB_ACTIVATE_ALL;
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;
struct ccwmx51_lcd_pdata *plat = event->info->dev->platform_data;
switch (val) {
case FB_EVENT_FB_REGISTERED:
lcd_init_fb(event->info);
lcd_poweron(plat);
break;
case FB_EVENT_BLANK:
if (*((int *)event->data) == FB_BLANK_UNBLANK) {
lcd_poweron(plat);
} else {
lcd_poweroff(plat);
}
break;
}
return 0;
}
static struct notifier_block nb = {
.notifier_call = lcd_fb_event,
};
static int __devinit lcd_sync_probe(struct platform_device *pdev)
{
struct ccwmx51_lcd_pdata *plat = pdev->dev.platform_data;
int i;
if (!plat)
return -ENODEV;
if (plat->vif < 0 || plat->vif > (MAX_DISPLAYS - 1))
return -EINVAL;
if (plat->init)
plat->init(plat->vif);
plcd_dev[plat->vif] = pdev;
for (i = 0; i < num_registered_fb; i++) {
if ((!strcmp(registered_fb[i]->fix.id, DISP0_ID) && plat->vif == 0) ||
(!strcmp(registered_fb[i]->fix.id, DISP1_ID) && plat->vif == 1)) {
lcd_init_fb(registered_fb[i]);
/* Clear the screen */
memset((char *)registered_fb[i]->screen_base, 0,
registered_fb[i]->fix.smem_len);
fb_show_logo(registered_fb[i], 0);
}
}
/**
* Register the block notifier only once. The device being notified can be
* retrieved from the received event. There are some issues when the same
* notifier is registered multiple times.
*/
if (plcd_dev[0] == NULL && plcd_dev[1] == NULL)
fb_register_client(&nb);
lcd_poweron(plat);
return 0;
}
static int __devexit lcd_sync_remove(struct platform_device *pdev)
{
struct ccwmx51_lcd_pdata *plat = pdev->dev.platform_data;
lcd_poweroff(plat);
if (plat->deinit)
plat->deinit(plat->vif);
plcd_dev[plat->vif] = NULL;
if (plcd_dev[0] == NULL && plcd_dev[1] == NULL)
fb_unregister_client(&nb);
return 0;
}
#ifdef CONFIG_PM
static int lcd_sync_suspend(struct platform_device *pdev, pm_message_t state)
{
return 0;
}
static int lcd_sync_resume(struct platform_device *pdev)
{
return 0;
}
#else
#define lcd_sync_suspend NULL
#define lcd_sync_resume NULL
#endif
static struct platform_driver lcd_driver = {
.driver = {
.name = "ccwmx51_display"
},
.probe = lcd_sync_probe,
.remove = __devexit_p(lcd_sync_remove),
.suspend = lcd_sync_suspend,
.resume = lcd_sync_resume,
};
static void lcd_poweron(struct ccwmx51_lcd_pdata *plat)
{
if (plat && plat->bl_enable)
plat->bl_enable(1, plat->vif);
}
static void lcd_poweroff(struct ccwmx51_lcd_pdata *plat)
{
if (plat && plat->bl_enable)
plat->bl_enable(0, plat->vif);
}
static int __init lcd_sync_init(void)
{
return platform_driver_register(&lcd_driver);
}
static void __exit lcd_sync_exit(void)
{
platform_driver_unregister(&lcd_driver);
}
module_init(lcd_sync_init);
module_exit(lcd_sync_exit);
MODULE_AUTHOR("Digi International, Inc.");
MODULE_DESCRIPTION("ConnectCore Wi-i.MX51 LCD init driver");
MODULE_LICENSE("GPL");
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