271 lines
6.1 KiB
C
271 lines
6.1 KiB
C
/* Copyright (c) 2009-2011, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/delay.h>
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#include <linux/pwm.h>
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#ifdef CONFIG_PMIC8058_PWM
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#include <linux/mfd/pmic8058.h>
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#include <linux/pmic8058-pwm.h>
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#endif
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#include <mach/gpio.h>
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#include "msm_fb.h"
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#ifdef CONFIG_PMIC8058_PWM
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static struct pwm_device *bl_pwm0;
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static struct pwm_device *bl_pwm1;
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/* for samsung panel 300hz was the minimum freq where flickering wasnt
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* observed as the screen was dimmed
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*/
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#define PWM_FREQ_HZ 300
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#define PWM_PERIOD_USEC (USEC_PER_SEC / PWM_FREQ_HZ)
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#define PWM_LEVEL 100
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#define PWM_DUTY_LEVEL (PWM_PERIOD_USEC / PWM_LEVEL)
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#endif
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struct lcdc_samsung_data {
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struct msm_panel_common_pdata *pdata;
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#ifdef CONFIG_FB_MSM_LCDC_DSUB
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int vga_enabled;
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#endif
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struct platform_device *fbpdev;
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};
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static struct lcdc_samsung_data *dd;
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static void lcdc_samsung_panel_set_backlight(struct msm_fb_data_type *mfd)
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{
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#ifdef CONFIG_PMIC8058_PWM
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int bl_level;
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int ret;
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bl_level = mfd->bl_level;
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if (bl_pwm0) {
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ret = pwm_config(bl_pwm0, PWM_DUTY_LEVEL * bl_level,
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PWM_PERIOD_USEC);
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if (ret)
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printk(KERN_ERR "pwm_config on pwm 0 failed %d\n", ret);
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}
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if (bl_pwm1) {
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ret = pwm_config(bl_pwm1,
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PWM_PERIOD_USEC - (PWM_DUTY_LEVEL * bl_level),
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PWM_PERIOD_USEC);
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if (ret)
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printk(KERN_ERR "pwm_config on pwm 1 failed %d\n", ret);
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}
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if (bl_pwm0) {
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ret = pwm_enable(bl_pwm0);
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if (ret)
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printk(KERN_ERR "pwm_enable on pwm 0 failed %d\n", ret);
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}
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if (bl_pwm1) {
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ret = pwm_enable(bl_pwm1);
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if (ret)
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printk(KERN_ERR "pwm_enable on pwm 1 failed %d\n", ret);
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}
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#endif
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}
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#ifdef CONFIG_FB_MSM_LCDC_DSUB
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static ssize_t show_vga_enable(struct device *device,
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struct device_attribute *attr, char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%d\n", dd->vga_enabled);
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}
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static ssize_t store_vga_enable(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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unsigned long enable;
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int rc;
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rc = strict_strtoul(buf, 10, &enable);
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if (rc)
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return -EINVAL;
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if (dd->pdata && dd->pdata->vga_switch)
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rc = dd->pdata->vga_switch(enable);
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else
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rc = -ENODEV;
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if (!rc) {
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dd->vga_enabled = enable;
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rc = count;
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}
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return rc;
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}
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static DEVICE_ATTR(vga_enable, S_IRUGO|S_IWUSR, show_vga_enable,
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store_vga_enable);
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static struct attribute *attrs[] = {
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&dev_attr_vga_enable.attr,
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NULL,
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};
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static struct attribute_group attr_group = {
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.attrs = attrs,
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};
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#endif
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static int __devinit samsung_probe(struct platform_device *pdev)
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{
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int rc = 0;
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#ifdef CONFIG_FB_MSM_LCDC_DSUB
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struct msm_fb_data_type *mfd;
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#endif
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if (pdev->id == 0) {
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dd = kzalloc(sizeof *dd, GFP_KERNEL);
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if (!dd)
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return -ENOMEM;
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#ifdef CONFIG_FB_MSM_LCDC_DSUB
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dd->vga_enabled = 0;
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#endif
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dd->pdata = pdev->dev.platform_data;
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return 0;
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} else if (!dd)
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return -ENODEV;
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#ifdef CONFIG_PMIC8058_PWM
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bl_pwm0 = pwm_request(dd->pdata->gpio_num[0], "backlight1");
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if (bl_pwm0 == NULL || IS_ERR(bl_pwm0)) {
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pr_err("%s pwm_request() failed\n", __func__);
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bl_pwm0 = NULL;
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}
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bl_pwm1 = pwm_request(dd->pdata->gpio_num[1], "backlight2");
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if (bl_pwm1 == NULL || IS_ERR(bl_pwm1)) {
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pr_err("%s pwm_request() failed\n", __func__);
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bl_pwm1 = NULL;
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}
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pr_debug("samsung_probe: bl_pwm0=%p LPG_chan0=%d "
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"bl_pwm1=%p LPG_chan1=%d\n",
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bl_pwm0, (int)dd->pdata->gpio_num[0],
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bl_pwm1, (int)dd->pdata->gpio_num[1]
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);
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#endif
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dd->fbpdev = msm_fb_add_device(pdev);
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if (!dd->fbpdev) {
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dev_err(&pdev->dev, "failed to add msm_fb device\n");
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rc = -ENODEV;
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goto probe_exit;
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}
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#ifdef CONFIG_FB_MSM_LCDC_DSUB
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mfd = platform_get_drvdata(dd->fbpdev);
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if (mfd && mfd->fbi && mfd->fbi->dev) {
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rc = sysfs_create_group(&mfd->fbi->dev->kobj, &attr_group);
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if (rc)
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dev_err(&pdev->dev, "failed to create sysfs group\n");
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} else {
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dev_err(&pdev->dev, "no dev to create sysfs group\n");
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rc = -ENODEV;
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}
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#endif
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probe_exit:
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return rc;
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}
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#ifdef CONFIG_FB_MSM_LCDC_DSUB
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static int __devexit samsung_remove(struct platform_device *pdev)
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{
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sysfs_remove_group(&dd->fbpdev->dev.kobj, &attr_group);
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return 0;
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}
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#endif
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static struct platform_driver this_driver = {
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.probe = samsung_probe,
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#ifdef CONFIG_FB_MSM_LCDC_DSUB
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.remove = samsung_remove,
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#endif
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.driver = {
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.name = "lcdc_samsung_wsvga",
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},
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};
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static struct msm_fb_panel_data samsung_panel_data = {
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.set_backlight = lcdc_samsung_panel_set_backlight,
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};
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static struct platform_device this_device = {
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.name = "lcdc_samsung_wsvga",
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.id = 1,
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.dev = {
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.platform_data = &samsung_panel_data,
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}
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};
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static int __init lcdc_samsung_panel_init(void)
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{
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int ret;
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struct msm_panel_info *pinfo;
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if (msm_fb_detect_client("lcdc_samsung_wsvga"))
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return 0;
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ret = platform_driver_register(&this_driver);
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if (ret)
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return ret;
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pinfo = &samsung_panel_data.panel_info;
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pinfo->xres = 1024;
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pinfo->yres = 600;
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#ifdef CONFIG_FB_MSM_LCDC_DSUB
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/* DSUB (VGA) is on the same bus, this allows us to allocate for the
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* max resolution of the DSUB display */
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pinfo->mode2_xres = 1440;
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pinfo->mode2_yres = 900;
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pinfo->mode2_bpp = 16;
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#else
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MSM_FB_SINGLE_MODE_PANEL(pinfo);
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#endif
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pinfo->type = LCDC_PANEL;
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pinfo->pdest = DISPLAY_1;
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pinfo->wait_cycle = 0;
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pinfo->bpp = 18;
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pinfo->fb_num = 2;
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pinfo->clk_rate = 43192000;
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pinfo->bl_max = PWM_LEVEL;
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pinfo->bl_min = 1;
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pinfo->lcdc.h_back_porch = 80;
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pinfo->lcdc.h_front_porch = 48;
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pinfo->lcdc.h_pulse_width = 32;
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pinfo->lcdc.v_back_porch = 4;
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pinfo->lcdc.v_front_porch = 3;
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pinfo->lcdc.v_pulse_width = 1;
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pinfo->lcdc.border_clr = 0;
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pinfo->lcdc.underflow_clr = 0xff;
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pinfo->lcdc.hsync_skew = 0;
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ret = platform_device_register(&this_device);
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if (ret)
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platform_driver_unregister(&this_driver);
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return ret;
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}
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module_init(lcdc_samsung_panel_init);
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