aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/video/omap/lcd_ldp.c
blob: 062466402c0e67531e4fff8dbe6484973b1f7ced (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
/*
 * LCD panel support for the TI LDP board
 *
 * Copyright (C) 2007 WindRiver
 * Author: Stanley Miao <stanley.miao@windriver.com>
 *
 * Derived from drivers/video/omap/lcd-2430sdp.c
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * 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.,
 * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/i2c/twl.h>

#include <asm/gpio.h>
#include <plat/mux.h>
#include <asm/mach-types.h>

#include "omapfb.h"

#define LCD_PANEL_BACKLIGHT_GPIO	(15 + OMAP_MAX_GPIO_LINES)
#define LCD_PANEL_ENABLE_GPIO		(7 + OMAP_MAX_GPIO_LINES)

#define LCD_PANEL_RESET_GPIO		55
#define LCD_PANEL_QVGA_GPIO		56

#ifdef CONFIG_FB_OMAP_LCD_VGA
#define LCD_XRES		480
#define LCD_YRES		640
#define LCD_PIXCLOCK_MAX	41700
#else
#define LCD_XRES		240
#define LCD_YRES		320
#define LCD_PIXCLOCK_MAX	185186
#endif

#define PM_RECEIVER             TWL4030_MODULE_PM_RECEIVER
#define ENABLE_VAUX2_DEDICATED  0x09
#define ENABLE_VAUX2_DEV_GRP    0x20
#define ENABLE_VAUX3_DEDICATED	0x03
#define ENABLE_VAUX3_DEV_GRP	0x20

#define ENABLE_VPLL2_DEDICATED          0x05
#define ENABLE_VPLL2_DEV_GRP            0xE0
#define TWL4030_VPLL2_DEV_GRP           0x33
#define TWL4030_VPLL2_DEDICATED         0x36

#define t2_out(c, r, v) twl_i2c_write_u8(c, r, v)


static int ldp_panel_init(struct lcd_panel *panel,
				struct omapfb_device *fbdev)
{
	gpio_request(LCD_PANEL_RESET_GPIO, "lcd reset");
	gpio_request(LCD_PANEL_QVGA_GPIO, "lcd qvga");
	gpio_request(LCD_PANEL_ENABLE_GPIO, "lcd panel");
	gpio_request(LCD_PANEL_BACKLIGHT_GPIO, "lcd backlight");

	gpio_direction_output(LCD_PANEL_QVGA_GPIO, 0);
	gpio_direction_output(LCD_PANEL_RESET_GPIO, 0);
	gpio_direction_output(LCD_PANEL_ENABLE_GPIO, 0);
	gpio_direction_output(LCD_PANEL_BACKLIGHT_GPIO, 0);

#ifdef CONFIG_FB_OMAP_LCD_VGA
	gpio_set_value(LCD_PANEL_QVGA_GPIO, 0);
#else
	gpio_set_value(LCD_PANEL_QVGA_GPIO, 1);
#endif
	gpio_set_value(LCD_PANEL_RESET_GPIO, 1);

	return 0;
}

static void ldp_panel_cleanup(struct lcd_panel *panel)
{
	gpio_free(LCD_PANEL_BACKLIGHT_GPIO);
	gpio_free(LCD_PANEL_ENABLE_GPIO);
	gpio_free(LCD_PANEL_QVGA_GPIO);
	gpio_free(LCD_PANEL_RESET_GPIO);
}

static int ldp_panel_enable(struct lcd_panel *panel)
{
	if (0 != t2_out(PM_RECEIVER, ENABLE_VPLL2_DEDICATED,
			TWL4030_VPLL2_DEDICATED))
		return -EIO;
	if (0 != t2_out(PM_RECEIVER, ENABLE_VPLL2_DEV_GRP,
			TWL4030_VPLL2_DEV_GRP))
		return -EIO;

	gpio_direction_output(LCD_PANEL_ENABLE_GPIO, 1);
	gpio_direction_output(LCD_PANEL_BACKLIGHT_GPIO, 1);

	if (0 != t2_out(PM_RECEIVER, ENABLE_VAUX3_DEDICATED,
				TWL4030_VAUX3_DEDICATED))
		return -EIO;
	if (0 != t2_out(PM_RECEIVER, ENABLE_VAUX3_DEV_GRP,
				TWL4030_VAUX3_DEV_GRP))
		return -EIO;

	return 0;
}

static void ldp_panel_disable(struct lcd_panel *panel)
{
	gpio_direction_output(LCD_PANEL_ENABLE_GPIO, 0);
	gpio_direction_output(LCD_PANEL_BACKLIGHT_GPIO, 0);

	t2_out(PM_RECEIVER, 0x0, TWL4030_VPLL2_DEDICATED);
	t2_out(PM_RECEIVER, 0x0, TWL4030_VPLL2_DEV_GRP);
	msleep(4);
}

static unsigned long ldp_panel_get_caps(struct lcd_panel *panel)
{
	return 0;
}

struct lcd_panel ldp_panel = {
	.name		= "ldp",
	.config		= OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC |
			  OMAP_LCDC_INV_HSYNC,

	.bpp		= 16,
	.data_lines	= 18,
	.x_res		= LCD_XRES,
	.y_res		= LCD_YRES,
	.hsw		= 3,		/* hsync_len (4) - 1 */
	.hfp		= 3,		/* right_margin (4) - 1 */
	.hbp		= 39,		/* left_margin (40) - 1 */
	.vsw		= 1,		/* vsync_len (2) - 1 */
	.vfp		= 2,		/* lower_margin */
	.vbp		= 7,		/* upper_margin (8) - 1 */

	.pixel_clock	= LCD_PIXCLOCK_MAX,

	.init		= ldp_panel_init,
	.cleanup	= ldp_panel_cleanup,
	.enable		= ldp_panel_enable,
	.disable	= ldp_panel_disable,
	.get_caps	= ldp_panel_get_caps,
};

static int ldp_panel_probe(struct platform_device *pdev)
{
	omapfb_register_panel(&ldp_panel);
	return 0;
}

static int ldp_panel_remove(struct platform_device *pdev)
{
	return 0;
}

static int ldp_panel_suspend(struct platform_device *pdev, pm_message_t mesg)
{
	return 0;
}

static int ldp_panel_resume(struct platform_device *pdev)
{
	return 0;
}

struct platform_driver ldp_panel_driver = {
	.probe		= ldp_panel_probe,
	.remove		= ldp_panel_remove,
	.suspend	= ldp_panel_suspend,
	.resume		= ldp_panel_resume,
	.driver		= {
		.name	= "ldp_lcd",
		.owner	= THIS_MODULE,
	},
};

static int __init ldp_panel_drv_init(void)
{
	return platform_driver_register(&ldp_panel_driver);
}

static void __exit ldp_panel_drv_exit(void)
{
	platform_driver_unregister(&ldp_panel_driver);
}

module_init(ldp_panel_drv_init);
module_exit(ldp_panel_drv_exit);

Privacy Policy