2019-05-27 14:55:05 +08:00
|
|
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
2009-09-23 07:46:44 +08:00
|
|
|
/*
|
|
|
|
* Based on drivers/video/omap/lcd_inn1510.c
|
|
|
|
*
|
|
|
|
* LCD panel support for the Amstrad E3 (Delta) videophone.
|
|
|
|
*
|
|
|
|
* Copyright (C) 2006 Jonathan McDowell <noodles@earth.li>
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/platform_device.h>
|
|
|
|
#include <linux/io.h>
|
|
|
|
#include <linux/delay.h>
|
2018-10-08 18:57:36 +08:00
|
|
|
#include <linux/gpio/consumer.h>
|
2009-12-11 21:21:46 +08:00
|
|
|
#include <linux/lcd.h>
|
2009-09-23 07:46:44 +08:00
|
|
|
|
2019-08-06 22:08:34 +08:00
|
|
|
#include <linux/soc/ti/omap1-io.h>
|
2009-08-03 20:06:36 +08:00
|
|
|
|
|
|
|
#include "omapfb.h"
|
2009-09-23 07:46:44 +08:00
|
|
|
|
|
|
|
#define AMS_DELTA_DEFAULT_CONTRAST 112
|
|
|
|
|
2009-12-11 21:21:46 +08:00
|
|
|
#define AMS_DELTA_MAX_CONTRAST 0x00FF
|
|
|
|
#define AMS_DELTA_LCD_POWER 0x0100
|
|
|
|
|
|
|
|
|
|
|
|
/* LCD class device section */
|
|
|
|
|
|
|
|
static int ams_delta_lcd;
|
2018-10-08 18:57:36 +08:00
|
|
|
static struct gpio_desc *gpiod_vblen;
|
|
|
|
static struct gpio_desc *gpiod_ndisp;
|
2009-12-11 21:21:46 +08:00
|
|
|
|
|
|
|
static int ams_delta_lcd_set_power(struct lcd_device *dev, int power)
|
|
|
|
{
|
|
|
|
if (power == FB_BLANK_UNBLANK) {
|
|
|
|
if (!(ams_delta_lcd & AMS_DELTA_LCD_POWER)) {
|
|
|
|
omap_writeb(ams_delta_lcd & AMS_DELTA_MAX_CONTRAST,
|
|
|
|
OMAP_PWL_ENABLE);
|
|
|
|
omap_writeb(1, OMAP_PWL_CLK_ENABLE);
|
|
|
|
ams_delta_lcd |= AMS_DELTA_LCD_POWER;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
if (ams_delta_lcd & AMS_DELTA_LCD_POWER) {
|
|
|
|
omap_writeb(0, OMAP_PWL_ENABLE);
|
|
|
|
omap_writeb(0, OMAP_PWL_CLK_ENABLE);
|
|
|
|
ams_delta_lcd &= ~AMS_DELTA_LCD_POWER;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ams_delta_lcd_set_contrast(struct lcd_device *dev, int value)
|
|
|
|
{
|
|
|
|
if ((value >= 0) && (value <= AMS_DELTA_MAX_CONTRAST)) {
|
|
|
|
omap_writeb(value, OMAP_PWL_ENABLE);
|
|
|
|
ams_delta_lcd &= ~AMS_DELTA_MAX_CONTRAST;
|
|
|
|
ams_delta_lcd |= value;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_LCD_CLASS_DEVICE
|
|
|
|
static int ams_delta_lcd_get_power(struct lcd_device *dev)
|
|
|
|
{
|
|
|
|
if (ams_delta_lcd & AMS_DELTA_LCD_POWER)
|
|
|
|
return FB_BLANK_UNBLANK;
|
|
|
|
else
|
|
|
|
return FB_BLANK_POWERDOWN;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int ams_delta_lcd_get_contrast(struct lcd_device *dev)
|
|
|
|
{
|
|
|
|
if (!(ams_delta_lcd & AMS_DELTA_LCD_POWER))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
return ams_delta_lcd & AMS_DELTA_MAX_CONTRAST;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct lcd_ops ams_delta_lcd_ops = {
|
|
|
|
.get_power = ams_delta_lcd_get_power,
|
|
|
|
.set_power = ams_delta_lcd_set_power,
|
|
|
|
.get_contrast = ams_delta_lcd_get_contrast,
|
|
|
|
.set_contrast = ams_delta_lcd_set_contrast,
|
|
|
|
};
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
|
|
/* omapfb panel section */
|
|
|
|
|
2009-09-23 07:46:44 +08:00
|
|
|
static int ams_delta_panel_enable(struct lcd_panel *panel)
|
|
|
|
{
|
2018-10-08 18:57:36 +08:00
|
|
|
gpiod_set_value(gpiod_ndisp, 1);
|
|
|
|
gpiod_set_value(gpiod_vblen, 1);
|
2009-09-23 07:46:44 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void ams_delta_panel_disable(struct lcd_panel *panel)
|
|
|
|
{
|
2018-10-08 18:57:36 +08:00
|
|
|
gpiod_set_value(gpiod_vblen, 0);
|
|
|
|
gpiod_set_value(gpiod_ndisp, 0);
|
2009-09-23 07:46:44 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static struct lcd_panel ams_delta_panel = {
|
|
|
|
.name = "ams-delta",
|
|
|
|
.config = 0,
|
|
|
|
|
|
|
|
.bpp = 12,
|
|
|
|
.data_lines = 16,
|
|
|
|
.x_res = 480,
|
|
|
|
.y_res = 320,
|
|
|
|
.pixel_clock = 4687,
|
|
|
|
.hsw = 3,
|
|
|
|
.hfp = 1,
|
|
|
|
.hbp = 1,
|
|
|
|
.vsw = 1,
|
|
|
|
.vfp = 0,
|
|
|
|
.vbp = 0,
|
|
|
|
.pcd = 0,
|
|
|
|
.acb = 37,
|
|
|
|
|
|
|
|
.enable = ams_delta_panel_enable,
|
|
|
|
.disable = ams_delta_panel_disable,
|
|
|
|
};
|
|
|
|
|
2009-12-11 21:21:46 +08:00
|
|
|
|
|
|
|
/* platform driver section */
|
|
|
|
|
2009-09-23 07:46:44 +08:00
|
|
|
static int ams_delta_panel_probe(struct platform_device *pdev)
|
|
|
|
{
|
2009-12-11 21:21:46 +08:00
|
|
|
struct lcd_device *lcd_device = NULL;
|
|
|
|
|
2018-10-08 18:57:36 +08:00
|
|
|
gpiod_vblen = devm_gpiod_get(&pdev->dev, "vblen", GPIOD_OUT_LOW);
|
2021-09-17 12:24:11 +08:00
|
|
|
if (IS_ERR(gpiod_vblen))
|
|
|
|
return dev_err_probe(&pdev->dev, PTR_ERR(gpiod_vblen),
|
|
|
|
"VBLEN GPIO request failed\n");
|
2018-10-08 18:57:36 +08:00
|
|
|
|
|
|
|
gpiod_ndisp = devm_gpiod_get(&pdev->dev, "ndisp", GPIOD_OUT_LOW);
|
2021-09-17 12:24:11 +08:00
|
|
|
if (IS_ERR(gpiod_ndisp))
|
|
|
|
return dev_err_probe(&pdev->dev, PTR_ERR(gpiod_ndisp),
|
|
|
|
"NDISP GPIO request failed\n");
|
2018-10-08 18:57:36 +08:00
|
|
|
|
|
|
|
#ifdef CONFIG_LCD_CLASS_DEVICE
|
2009-12-11 21:21:46 +08:00
|
|
|
lcd_device = lcd_device_register("omapfb", &pdev->dev, NULL,
|
|
|
|
&ams_delta_lcd_ops);
|
|
|
|
|
|
|
|
if (IS_ERR(lcd_device)) {
|
2022-04-05 05:18:51 +08:00
|
|
|
int ret = PTR_ERR(lcd_device);
|
|
|
|
|
2009-12-11 21:21:46 +08:00
|
|
|
dev_err(&pdev->dev, "failed to register device\n");
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
platform_set_drvdata(pdev, lcd_device);
|
|
|
|
lcd_device->props.max_contrast = AMS_DELTA_MAX_CONTRAST;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
ams_delta_lcd_set_contrast(lcd_device, AMS_DELTA_DEFAULT_CONTRAST);
|
|
|
|
ams_delta_lcd_set_power(lcd_device, FB_BLANK_UNBLANK);
|
|
|
|
|
2009-09-23 07:46:44 +08:00
|
|
|
omapfb_register_panel(&ams_delta_panel);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-12-09 09:37:57 +08:00
|
|
|
static struct platform_driver ams_delta_panel_driver = {
|
2009-09-23 07:46:44 +08:00
|
|
|
.probe = ams_delta_panel_probe,
|
|
|
|
.driver = {
|
|
|
|
.name = "lcd_ams_delta",
|
|
|
|
},
|
|
|
|
};
|
|
|
|
|
2011-12-09 09:59:56 +08:00
|
|
|
module_platform_driver(ams_delta_panel_driver);
|
2018-06-09 00:08:12 +08:00
|
|
|
|
|
|
|
MODULE_AUTHOR("Jonathan McDowell <noodles@earth.li>");
|
|
|
|
MODULE_DESCRIPTION("LCD panel support for the Amstrad E3 (Delta) videophone");
|
|
|
|
MODULE_LICENSE("GPL");
|