/drivers/video/omap/lcd_ams_delta.c

  1/*
  2 * Based on drivers/video/omap/lcd_inn1510.c
  3 *
  4 * LCD panel support for the Amstrad E3 (Delta) videophone.
  5 *
  6 * Copyright (C) 2006 Jonathan McDowell <noodles@earth.li>
  7 *
  8 * This program is free software; you can redistribute it and/or modify it
  9 * under the terms of the GNU General Public License as published by the
 10 * Free Software Foundation; either version 2 of the License, or (at your
 11 * option) any later version.
 12 *
 13 * This program is distributed in the hope that it will be useful, but
 14 * WITHOUT ANY WARRANTY; without even the implied warranty of
 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 16 * General Public License for more details.
 17 *
 18 * You should have received a copy of the GNU General Public License along
 19 * with this program; if not, write to the Free Software Foundation, Inc.,
 20 * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 21 */
 22
 23#include <linux/module.h>
 24#include <linux/platform_device.h>
 25#include <linux/io.h>
 26#include <linux/delay.h>
 27#include <linux/lcd.h>
 28
 29#include <plat/board-ams-delta.h>
 30#include <mach/hardware.h>
 31
 32#include "omapfb.h"
 33
 34#define AMS_DELTA_DEFAULT_CONTRAST	112
 35
 36#define AMS_DELTA_MAX_CONTRAST		0x00FF
 37#define AMS_DELTA_LCD_POWER		0x0100
 38
 39
 40/* LCD class device section */
 41
 42static int ams_delta_lcd;
 43
 44static int ams_delta_lcd_set_power(struct lcd_device *dev, int power)
 45{
 46	if (power == FB_BLANK_UNBLANK) {
 47		if (!(ams_delta_lcd & AMS_DELTA_LCD_POWER)) {
 48			omap_writeb(ams_delta_lcd & AMS_DELTA_MAX_CONTRAST,
 49					OMAP_PWL_ENABLE);
 50			omap_writeb(1, OMAP_PWL_CLK_ENABLE);
 51			ams_delta_lcd |= AMS_DELTA_LCD_POWER;
 52		}
 53	} else {
 54		if (ams_delta_lcd & AMS_DELTA_LCD_POWER) {
 55			omap_writeb(0, OMAP_PWL_ENABLE);
 56			omap_writeb(0, OMAP_PWL_CLK_ENABLE);
 57			ams_delta_lcd &= ~AMS_DELTA_LCD_POWER;
 58		}
 59	}
 60	return 0;
 61}
 62
 63static int ams_delta_lcd_set_contrast(struct lcd_device *dev, int value)
 64{
 65	if ((value >= 0) && (value <= AMS_DELTA_MAX_CONTRAST)) {
 66		omap_writeb(value, OMAP_PWL_ENABLE);
 67		ams_delta_lcd &= ~AMS_DELTA_MAX_CONTRAST;
 68		ams_delta_lcd |= value;
 69	}
 70	return 0;
 71}
 72
 73#ifdef CONFIG_LCD_CLASS_DEVICE
 74static int ams_delta_lcd_get_power(struct lcd_device *dev)
 75{
 76	if (ams_delta_lcd & AMS_DELTA_LCD_POWER)
 77		return FB_BLANK_UNBLANK;
 78	else
 79		return FB_BLANK_POWERDOWN;
 80}
 81
 82static int ams_delta_lcd_get_contrast(struct lcd_device *dev)
 83{
 84	if (!(ams_delta_lcd & AMS_DELTA_LCD_POWER))
 85		return 0;
 86
 87	return ams_delta_lcd & AMS_DELTA_MAX_CONTRAST;
 88}
 89
 90static struct lcd_ops ams_delta_lcd_ops = {
 91	.get_power = ams_delta_lcd_get_power,
 92	.set_power = ams_delta_lcd_set_power,
 93	.get_contrast = ams_delta_lcd_get_contrast,
 94	.set_contrast = ams_delta_lcd_set_contrast,
 95};
 96#endif
 97
 98
 99/* omapfb panel section */
100
101static int ams_delta_panel_init(struct lcd_panel *panel,
102		struct omapfb_device *fbdev)
103{
104	return 0;
105}
106
107static void ams_delta_panel_cleanup(struct lcd_panel *panel)
108{
109}
110
111static int ams_delta_panel_enable(struct lcd_panel *panel)
112{
113	ams_delta_latch2_write(AMS_DELTA_LATCH2_LCD_NDISP,
114			AMS_DELTA_LATCH2_LCD_NDISP);
115	ams_delta_latch2_write(AMS_DELTA_LATCH2_LCD_VBLEN,
116			AMS_DELTA_LATCH2_LCD_VBLEN);
117	return 0;
118}
119
120static void ams_delta_panel_disable(struct lcd_panel *panel)
121{
122	ams_delta_latch2_write(AMS_DELTA_LATCH2_LCD_VBLEN, 0);
123	ams_delta_latch2_write(AMS_DELTA_LATCH2_LCD_NDISP, 0);
124}
125
126static unsigned long ams_delta_panel_get_caps(struct lcd_panel *panel)
127{
128	return 0;
129}
130
131static struct lcd_panel ams_delta_panel = {
132	.name		= "ams-delta",
133	.config		= 0,
134
135	.bpp		= 12,
136	.data_lines	= 16,
137	.x_res		= 480,
138	.y_res		= 320,
139	.pixel_clock	= 4687,
140	.hsw		= 3,
141	.hfp		= 1,
142	.hbp		= 1,
143	.vsw		= 1,
144	.vfp		= 0,
145	.vbp		= 0,
146	.pcd		= 0,
147	.acb		= 37,
148
149	.init		= ams_delta_panel_init,
150	.cleanup	= ams_delta_panel_cleanup,
151	.enable		= ams_delta_panel_enable,
152	.disable	= ams_delta_panel_disable,
153	.get_caps	= ams_delta_panel_get_caps,
154};
155
156
157/* platform driver section */
158
159static int ams_delta_panel_probe(struct platform_device *pdev)
160{
161	struct lcd_device *lcd_device = NULL;
162#ifdef CONFIG_LCD_CLASS_DEVICE
163	int ret;
164
165	lcd_device = lcd_device_register("omapfb", &pdev->dev, NULL,
166						&ams_delta_lcd_ops);
167
168	if (IS_ERR(lcd_device)) {
169		ret = PTR_ERR(lcd_device);
170		dev_err(&pdev->dev, "failed to register device\n");
171		return ret;
172	}
173
174	platform_set_drvdata(pdev, lcd_device);
175	lcd_device->props.max_contrast = AMS_DELTA_MAX_CONTRAST;
176#endif
177
178	ams_delta_lcd_set_contrast(lcd_device, AMS_DELTA_DEFAULT_CONTRAST);
179	ams_delta_lcd_set_power(lcd_device, FB_BLANK_UNBLANK);
180
181	omapfb_register_panel(&ams_delta_panel);
182	return 0;
183}
184
185static int ams_delta_panel_remove(struct platform_device *pdev)
186{
187	return 0;
188}
189
190static int ams_delta_panel_suspend(struct platform_device *pdev,
191		pm_message_t mesg)
192{
193	return 0;
194}
195
196static int ams_delta_panel_resume(struct platform_device *pdev)
197{
198	return 0;
199}
200
201struct platform_driver ams_delta_panel_driver = {
202	.probe		= ams_delta_panel_probe,
203	.remove		= ams_delta_panel_remove,
204	.suspend	= ams_delta_panel_suspend,
205	.resume		= ams_delta_panel_resume,
206	.driver		= {
207		.name	= "lcd_ams_delta",
208		.owner	= THIS_MODULE,
209	},
210};
211
212static int __init ams_delta_panel_drv_init(void)
213{
214	return platform_driver_register(&ams_delta_panel_driver);
215}
216
217static void __exit ams_delta_panel_drv_cleanup(void)
218{
219	platform_driver_unregister(&ams_delta_panel_driver);
220}
221
222module_init(ams_delta_panel_drv_init);
223module_exit(ams_delta_panel_drv_cleanup);