Linux 2.6.34-rc3
[pohmelfs.git] / drivers / video / omap / lcd_ams_delta.c
blob6978ae4ef83aedf90a560f1d166a890a413ad25e
1 /*
2 * Based on drivers/video/omap/lcd_inn1510.c
4 * LCD panel support for the Amstrad E3 (Delta) videophone.
6 * Copyright (C) 2006 Jonathan McDowell <noodles@earth.li>
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.
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.
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.
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>
29 #include <plat/board-ams-delta.h>
30 #include <mach/hardware.h>
32 #include "omapfb.h"
34 #define AMS_DELTA_DEFAULT_CONTRAST 112
36 #define AMS_DELTA_MAX_CONTRAST 0x00FF
37 #define AMS_DELTA_LCD_POWER 0x0100
40 /* LCD class device section */
42 static int ams_delta_lcd;
44 static int ams_delta_lcd_set_power(struct lcd_device *dev, int power)
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;
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;
60 return 0;
63 static int ams_delta_lcd_set_contrast(struct lcd_device *dev, int value)
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;
70 return 0;
73 #ifdef CONFIG_LCD_CLASS_DEVICE
74 static int ams_delta_lcd_get_power(struct lcd_device *dev)
76 if (ams_delta_lcd & AMS_DELTA_LCD_POWER)
77 return FB_BLANK_UNBLANK;
78 else
79 return FB_BLANK_POWERDOWN;
82 static int ams_delta_lcd_get_contrast(struct lcd_device *dev)
84 if (!(ams_delta_lcd & AMS_DELTA_LCD_POWER))
85 return 0;
87 return ams_delta_lcd & AMS_DELTA_MAX_CONTRAST;
90 static 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,
96 #endif
99 /* omapfb panel section */
101 static int ams_delta_panel_init(struct lcd_panel *panel,
102 struct omapfb_device *fbdev)
104 return 0;
107 static void ams_delta_panel_cleanup(struct lcd_panel *panel)
111 static int ams_delta_panel_enable(struct lcd_panel *panel)
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;
120 static void ams_delta_panel_disable(struct lcd_panel *panel)
122 ams_delta_latch2_write(AMS_DELTA_LATCH2_LCD_VBLEN, 0);
123 ams_delta_latch2_write(AMS_DELTA_LATCH2_LCD_NDISP, 0);
126 static unsigned long ams_delta_panel_get_caps(struct lcd_panel *panel)
128 return 0;
131 static struct lcd_panel ams_delta_panel = {
132 .name = "ams-delta",
133 .config = 0,
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,
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,
157 /* platform driver section */
159 static int ams_delta_panel_probe(struct platform_device *pdev)
161 struct lcd_device *lcd_device = NULL;
162 #ifdef CONFIG_LCD_CLASS_DEVICE
163 int ret;
165 lcd_device = lcd_device_register("omapfb", &pdev->dev, NULL,
166 &ams_delta_lcd_ops);
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;
174 platform_set_drvdata(pdev, lcd_device);
175 lcd_device->props.max_contrast = AMS_DELTA_MAX_CONTRAST;
176 #endif
178 ams_delta_lcd_set_contrast(lcd_device, AMS_DELTA_DEFAULT_CONTRAST);
179 ams_delta_lcd_set_power(lcd_device, FB_BLANK_UNBLANK);
181 omapfb_register_panel(&ams_delta_panel);
182 return 0;
185 static int ams_delta_panel_remove(struct platform_device *pdev)
187 return 0;
190 static int ams_delta_panel_suspend(struct platform_device *pdev,
191 pm_message_t mesg)
193 return 0;
196 static int ams_delta_panel_resume(struct platform_device *pdev)
198 return 0;
201 struct 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,
212 static int __init ams_delta_panel_drv_init(void)
214 return platform_driver_register(&ams_delta_panel_driver);
217 static void __exit ams_delta_panel_drv_cleanup(void)
219 platform_driver_unregister(&ams_delta_panel_driver);
222 module_init(ams_delta_panel_drv_init);
223 module_exit(ams_delta_panel_drv_cleanup);