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2a8729c4 SS |
1 | /* |
2 | * LCD panel support for the TI OMAP3 EVM board | |
3 | * | |
4 | * Author: Steve Sakoman <steve@sakoman.com> | |
5 | * | |
6 | * Derived from drivers/video/omap/lcd-apollon.c | |
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/gpio.h> | |
26 | #include <linux/i2c/twl4030.h> | |
27 | ||
28 | #include <mach/mux.h> | |
29 | #include <mach/omapfb.h> | |
30 | #include <asm/mach-types.h> | |
31 | ||
32 | #define LCD_PANEL_ENABLE_GPIO 153 | |
33 | #define LCD_PANEL_LR 2 | |
34 | #define LCD_PANEL_UD 3 | |
35 | #define LCD_PANEL_INI 152 | |
36 | #define LCD_PANEL_QVGA 154 | |
37 | #define LCD_PANEL_RESB 155 | |
38 | ||
39 | #define ENABLE_VDAC_DEDICATED 0x03 | |
40 | #define ENABLE_VDAC_DEV_GRP 0x20 | |
41 | #define ENABLE_VPLL2_DEDICATED 0x05 | |
42 | #define ENABLE_VPLL2_DEV_GRP 0xE0 | |
43 | ||
44 | #define TWL_LED_LEDEN 0x00 | |
45 | #define TWL_PWMA_PWMAON 0x00 | |
46 | #define TWL_PWMA_PWMAOFF 0x01 | |
47 | ||
48 | static unsigned int bklight_level; | |
49 | ||
50 | static int omap3evm_panel_init(struct lcd_panel *panel, | |
51 | struct omapfb_device *fbdev) | |
52 | { | |
53 | gpio_request(LCD_PANEL_LR, "LCD lr"); | |
54 | gpio_request(LCD_PANEL_UD, "LCD ud"); | |
55 | gpio_request(LCD_PANEL_INI, "LCD ini"); | |
56 | gpio_request(LCD_PANEL_RESB, "LCD resb"); | |
57 | gpio_request(LCD_PANEL_QVGA, "LCD qvga"); | |
58 | ||
59 | gpio_direction_output(LCD_PANEL_RESB, 1); | |
60 | gpio_direction_output(LCD_PANEL_INI, 1); | |
61 | gpio_direction_output(LCD_PANEL_QVGA, 0); | |
62 | gpio_direction_output(LCD_PANEL_LR, 1); | |
63 | gpio_direction_output(LCD_PANEL_UD, 1); | |
64 | ||
65 | twl4030_i2c_write_u8(TWL4030_MODULE_LED, 0x11, TWL_LED_LEDEN); | |
66 | twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x01, TWL_PWMA_PWMAON); | |
67 | twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x02, TWL_PWMA_PWMAOFF); | |
68 | bklight_level = 100; | |
69 | ||
70 | return 0; | |
71 | } | |
72 | ||
73 | static void omap3evm_panel_cleanup(struct lcd_panel *panel) | |
74 | { | |
75 | gpio_free(LCD_PANEL_QVGA); | |
76 | gpio_free(LCD_PANEL_RESB); | |
77 | gpio_free(LCD_PANEL_INI); | |
78 | gpio_free(LCD_PANEL_UD); | |
79 | gpio_free(LCD_PANEL_LR); | |
80 | } | |
81 | ||
82 | static int omap3evm_panel_enable(struct lcd_panel *panel) | |
83 | { | |
84 | gpio_set_value(LCD_PANEL_ENABLE_GPIO, 0); | |
85 | return 0; | |
86 | } | |
87 | ||
88 | static void omap3evm_panel_disable(struct lcd_panel *panel) | |
89 | { | |
90 | gpio_set_value(LCD_PANEL_ENABLE_GPIO, 1); | |
91 | } | |
92 | ||
93 | static unsigned long omap3evm_panel_get_caps(struct lcd_panel *panel) | |
94 | { | |
95 | return 0; | |
96 | } | |
97 | ||
98 | static int omap3evm_bklight_setlevel(struct lcd_panel *panel, | |
99 | unsigned int level) | |
100 | { | |
101 | u8 c; | |
102 | if ((level >= 0) && (level <= 100)) { | |
103 | c = (125 * (100 - level)) / 100 + 2; | |
104 | twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, c, TWL_PWMA_PWMAOFF); | |
105 | bklight_level = level; | |
106 | } | |
107 | return 0; | |
108 | } | |
109 | ||
110 | static unsigned int omap3evm_bklight_getlevel(struct lcd_panel *panel) | |
111 | { | |
112 | return bklight_level; | |
113 | } | |
114 | ||
115 | static unsigned int omap3evm_bklight_getmaxlevel(struct lcd_panel *panel) | |
116 | { | |
117 | return 100; | |
118 | } | |
119 | ||
120 | struct lcd_panel omap3evm_panel = { | |
121 | .name = "omap3evm", | |
122 | .config = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC | | |
123 | OMAP_LCDC_INV_HSYNC, | |
124 | ||
125 | .bpp = 16, | |
126 | .data_lines = 18, | |
127 | .x_res = 480, | |
128 | .y_res = 640, | |
129 | .hsw = 3, /* hsync_len (4) - 1 */ | |
130 | .hfp = 3, /* right_margin (4) - 1 */ | |
131 | .hbp = 39, /* left_margin (40) - 1 */ | |
132 | .vsw = 1, /* vsync_len (2) - 1 */ | |
133 | .vfp = 2, /* lower_margin */ | |
134 | .vbp = 7, /* upper_margin (8) - 1 */ | |
135 | ||
136 | .pixel_clock = 26000, | |
137 | ||
138 | .init = omap3evm_panel_init, | |
139 | .cleanup = omap3evm_panel_cleanup, | |
140 | .enable = omap3evm_panel_enable, | |
141 | .disable = omap3evm_panel_disable, | |
142 | .get_caps = omap3evm_panel_get_caps, | |
143 | .set_bklight_level = omap3evm_bklight_setlevel, | |
144 | .get_bklight_level = omap3evm_bklight_getlevel, | |
145 | .get_bklight_max = omap3evm_bklight_getmaxlevel, | |
146 | }; | |
147 | ||
148 | static int omap3evm_panel_probe(struct platform_device *pdev) | |
149 | { | |
150 | omapfb_register_panel(&omap3evm_panel); | |
151 | return 0; | |
152 | } | |
153 | ||
154 | static int omap3evm_panel_remove(struct platform_device *pdev) | |
155 | { | |
156 | return 0; | |
157 | } | |
158 | ||
159 | static int omap3evm_panel_suspend(struct platform_device *pdev, | |
160 | pm_message_t mesg) | |
161 | { | |
162 | return 0; | |
163 | } | |
164 | ||
165 | static int omap3evm_panel_resume(struct platform_device *pdev) | |
166 | { | |
167 | return 0; | |
168 | } | |
169 | ||
170 | struct platform_driver omap3evm_panel_driver = { | |
171 | .probe = omap3evm_panel_probe, | |
172 | .remove = omap3evm_panel_remove, | |
173 | .suspend = omap3evm_panel_suspend, | |
174 | .resume = omap3evm_panel_resume, | |
175 | .driver = { | |
176 | .name = "omap3evm_lcd", | |
177 | .owner = THIS_MODULE, | |
178 | }, | |
179 | }; | |
180 | ||
181 | static int __init omap3evm_panel_drv_init(void) | |
182 | { | |
183 | return platform_driver_register(&omap3evm_panel_driver); | |
184 | } | |
185 | ||
186 | static void __exit omap3evm_panel_drv_exit(void) | |
187 | { | |
188 | platform_driver_unregister(&omap3evm_panel_driver); | |
189 | } | |
190 | ||
191 | module_init(omap3evm_panel_drv_init); | |
192 | module_exit(omap3evm_panel_drv_exit); |