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/* Copyright (c) 2008-2009, Code Aurora Forum. 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 version 2 and
* only version 2 as published by the Free Software Foundation.
*
* 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.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/time.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/delay.h>
#include <mach/hardware.h>
#include <linux/io.h>
#include <asm/system.h>
#include <asm/mach-types.h>
#include <linux/semaphore.h>
#include <linux/uaccess.h>
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/pm_qos_params.h>
#include "msm_fb.h"
static int lcdc_probe(struct platform_device *pdev);
static int lcdc_remove(struct platform_device *pdev);
static int lcdc_off(struct platform_device *pdev);
static int lcdc_on(struct platform_device *pdev);
static struct platform_device *pdev_list[MSM_FB_MAX_DEV_LIST];
static int pdev_list_cnt;
static struct clk *mdp_lcdc_pclk_clk;
static struct clk *mdp_lcdc_pad_pclk_clk;
int mdp_lcdc_pclk_clk_rate;
int mdp_lcdc_pad_pclk_clk_rate;
static struct platform_driver lcdc_driver = {
.probe = lcdc_probe,
.remove = lcdc_remove,
.suspend = NULL,
.resume = NULL,
.shutdown = NULL,
.driver = {
.name = "lcdc",
},
};
static struct lcdc_platform_data *lcdc_pdata;
static int lcdc_off(struct platform_device *pdev)
{
int ret = 0;
ret = panel_next_off(pdev);
clk_disable(mdp_lcdc_pclk_clk);
clk_disable(mdp_lcdc_pad_pclk_clk);
if (lcdc_pdata && lcdc_pdata->lcdc_power_save)
lcdc_pdata->lcdc_power_save(0);
if (lcdc_pdata && lcdc_pdata->lcdc_gpio_config)
ret = lcdc_pdata->lcdc_gpio_config(0);
// pm_qos_update_requirement(PM_QOS_SYSTEM_BUS_FREQ , "lcdc",
// PM_QOS_DEFAULT_VALUE);
return ret;
}
static int lcdc_on(struct platform_device *pdev)
{
int ret = 0;
struct msm_fb_data_type *mfd;
unsigned long panel_pixclock_freq , pm_qos_freq;
mfd = platform_get_drvdata(pdev);
panel_pixclock_freq = mfd->fbi->var.pixclock;
if (panel_pixclock_freq > 58000000)
/* pm_qos_freq should be in Khz */
pm_qos_freq = panel_pixclock_freq / 1000 ;
else
pm_qos_freq = 58000;
// pm_qos_update_requirement(PM_QOS_SYSTEM_BUS_FREQ , "lcdc",
// pm_qos_freq);
mfd = platform_get_drvdata(pdev);
clk_enable(mdp_lcdc_pclk_clk);
clk_enable(mdp_lcdc_pad_pclk_clk);
if (lcdc_pdata && lcdc_pdata->lcdc_power_save)
lcdc_pdata->lcdc_power_save(1);
if (lcdc_pdata && lcdc_pdata->lcdc_gpio_config)
ret = lcdc_pdata->lcdc_gpio_config(1);
clk_set_rate(mdp_lcdc_pclk_clk, mfd->fbi->var.pixclock);
clk_set_rate(mdp_lcdc_pad_pclk_clk, mfd->fbi->var.pixclock);
mdp_lcdc_pclk_clk_rate = clk_get_rate(mdp_lcdc_pclk_clk);
mdp_lcdc_pad_pclk_clk_rate = clk_get_rate(mdp_lcdc_pad_pclk_clk);
ret = panel_next_on(pdev);
return ret;
}
static int lcdc_probe(struct platform_device *pdev)
{
struct msm_fb_data_type *mfd;
struct fb_info *fbi;
struct platform_device *mdp_dev = NULL;
struct msm_fb_panel_data *pdata = NULL;
int rc;
if (pdev->id == 0) {
lcdc_pdata = pdev->dev.platform_data;
return 0;
}
mfd = platform_get_drvdata(pdev);
if (!mfd)
return -ENODEV;
if (mfd->key != MFD_KEY)
return -EINVAL;
if (pdev_list_cnt >= MSM_FB_MAX_DEV_LIST)
return -ENOMEM;
mdp_dev = platform_device_alloc("mdp", pdev->id);
if (!mdp_dev)
return -ENOMEM;
/*
* link to the latest pdev
*/
mfd->pdev = mdp_dev;
mfd->dest = DISPLAY_LCDC;
/*
* alloc panel device data
*/
if (platform_device_add_data
(mdp_dev, pdev->dev.platform_data,
sizeof(struct msm_fb_panel_data))) {
printk(KERN_ERR "lcdc_probe: platform_device_add_data failed!\n");
platform_device_put(mdp_dev);
return -ENOMEM;
}
/*
* data chain
*/
pdata = (struct msm_fb_panel_data *)mdp_dev->dev.platform_data;
pdata->on = lcdc_on;
pdata->off = lcdc_off;
pdata->next = pdev;
/*
* get/set panel specific fb info
*/
mfd->panel_info = pdata->panel_info;
mfd->fb_imgType = MDP_RGB_565;
fbi = mfd->fbi;
fbi->var.pixclock = mfd->panel_info.clk_rate;
fbi->var.left_margin = mfd->panel_info.lcdc.h_back_porch;
fbi->var.right_margin = mfd->panel_info.lcdc.h_front_porch;
fbi->var.upper_margin = mfd->panel_info.lcdc.v_back_porch;
fbi->var.lower_margin = mfd->panel_info.lcdc.v_front_porch;
fbi->var.hsync_len = mfd->panel_info.lcdc.h_pulse_width;
fbi->var.vsync_len = mfd->panel_info.lcdc.v_pulse_width;
/*
* set driver data
*/
platform_set_drvdata(mdp_dev, mfd);
/*
* register in mdp driver
*/
rc = platform_device_add(mdp_dev);
if (rc)
goto lcdc_probe_err;
pdev_list[pdev_list_cnt++] = pdev;
return 0;
lcdc_probe_err:
platform_device_put(mdp_dev);
return rc;
}
static int lcdc_remove(struct platform_device *pdev)
{
// pm_qos_remove_requirement(PM_QOS_SYSTEM_BUS_FREQ , "lcdc");
return 0;
}
static int lcdc_register_driver(void)
{
return platform_driver_register(&lcdc_driver);
}
static int __init lcdc_driver_init(void)
{
mdp_lcdc_pclk_clk = clk_get(NULL, "mdp_lcdc_pclk_clk");
if (IS_ERR(mdp_lcdc_pclk_clk)) {
printk(KERN_ERR "error: can't get mdp_lcdc_pclk_clk!\n");
return IS_ERR(mdp_lcdc_pclk_clk);
}
mdp_lcdc_pad_pclk_clk = clk_get(NULL, "mdp_lcdc_pad_pclk_clk");
if (IS_ERR(mdp_lcdc_pad_pclk_clk)) {
printk(KERN_ERR "error: can't get mdp_lcdc_pad_pclk_clk!\n");
return IS_ERR(mdp_lcdc_pad_pclk_clk);
}
// pm_qos_add_requirement(PM_QOS_SYSTEM_BUS_FREQ , "lcdc",
// PM_QOS_DEFAULT_VALUE);
return lcdc_register_driver();
}
module_init(lcdc_driver_init);
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