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42acff34 | 1 | /* |
2 | * LCD panel support for the MISTRAL OMAP2EVM board | |
3 | * | |
4 | * Author: Arun C <arunedarath@mistralsolutions.com> | |
5 | * | |
6 | * Derived from drivers/video/omap/lcd_omap3evm.c | |
7 | * Derived from drivers/video/omap/lcd-apollon.c | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public License as published by the | |
11 | * Free Software Foundation; either version 2 of the License, or (at your | |
12 | * option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write to the Free Software Foundation, Inc., | |
21 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
22 | */ | |
23 | ||
24 | #include <linux/module.h> | |
25 | #include <linux/platform_device.h> | |
26 | #include <linux/gpio.h> | |
27 | #include <linux/i2c/twl4030.h> | |
28 | ||
29 | #include <mach/mux.h> | |
30 | #include <mach/omapfb.h> | |
31 | #include <asm/mach-types.h> | |
32 | ||
33 | #define LCD_PANEL_ENABLE_GPIO 154 | |
34 | #define LCD_PANEL_LR 128 | |
35 | #define LCD_PANEL_UD 129 | |
36 | #define LCD_PANEL_INI 152 | |
37 | #define LCD_PANEL_QVGA 148 | |
38 | #define LCD_PANEL_RESB 153 | |
39 | ||
40 | #define TWL_LED_LEDEN 0x00 | |
41 | #define TWL_PWMA_PWMAON 0x00 | |
42 | #define TWL_PWMA_PWMAOFF 0x01 | |
43 | ||
44 | static unsigned int bklight_level; | |
45 | ||
46 | static int omap2evm_panel_init(struct lcd_panel *panel, | |
47 | struct omapfb_device *fbdev) | |
48 | { | |
49 | gpio_request(LCD_PANEL_ENABLE_GPIO, "LCD enable"); | |
50 | gpio_request(LCD_PANEL_LR, "LCD lr"); | |
51 | gpio_request(LCD_PANEL_UD, "LCD ud"); | |
52 | gpio_request(LCD_PANEL_INI, "LCD ini"); | |
53 | gpio_request(LCD_PANEL_QVGA, "LCD qvga"); | |
54 | gpio_request(LCD_PANEL_RESB, "LCD resb"); | |
55 | ||
56 | gpio_direction_output(LCD_PANEL_ENABLE_GPIO, 1); | |
57 | gpio_direction_output(LCD_PANEL_RESB, 1); | |
58 | gpio_direction_output(LCD_PANEL_INI, 1); | |
59 | gpio_direction_output(LCD_PANEL_QVGA, 0); | |
60 | gpio_direction_output(LCD_PANEL_LR, 1); | |
61 | gpio_direction_output(LCD_PANEL_UD, 1); | |
62 | ||
63 | twl4030_i2c_write_u8(TWL4030_MODULE_LED, 0x11, TWL_LED_LEDEN); | |
64 | twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x01, TWL_PWMA_PWMAON); | |
65 | twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x02, TWL_PWMA_PWMAOFF); | |
66 | bklight_level = 100; | |
67 | ||
68 | return 0; | |
69 | } | |
70 | ||
71 | static void omap2evm_panel_cleanup(struct lcd_panel *panel) | |
72 | { | |
73 | gpio_free(LCD_PANEL_RESB); | |
74 | gpio_free(LCD_PANEL_QVGA); | |
75 | gpio_free(LCD_PANEL_INI); | |
76 | gpio_free(LCD_PANEL_UD); | |
77 | gpio_free(LCD_PANEL_LR); | |
78 | gpio_free(LCD_PANEL_ENABLE_GPIO); | |
79 | } | |
80 | ||
81 | static int omap2evm_panel_enable(struct lcd_panel *panel) | |
82 | { | |
83 | gpio_set_value(LCD_PANEL_ENABLE_GPIO, 0); | |
84 | return 0; | |
85 | } | |
86 | ||
87 | static void omap2evm_panel_disable(struct lcd_panel *panel) | |
88 | { | |
89 | gpio_set_value(LCD_PANEL_ENABLE_GPIO, 1); | |
90 | } | |
91 | ||
92 | static unsigned long omap2evm_panel_get_caps(struct lcd_panel *panel) | |
93 | { | |
94 | return 0; | |
95 | } | |
96 | ||
97 | static int omap2evm_bklight_setlevel(struct lcd_panel *panel, | |
98 | unsigned int level) | |
99 | { | |
100 | u8 c; | |
101 | if ((level >= 0) && (level <= 100)) { | |
102 | c = (125 * (100 - level)) / 100 + 2; | |
103 | twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, c, TWL_PWMA_PWMAOFF); | |
104 | bklight_level = level; | |
105 | } | |
106 | return 0; | |
107 | } | |
108 | ||
109 | static unsigned int omap2evm_bklight_getlevel(struct lcd_panel *panel) | |
110 | { | |
111 | return bklight_level; | |
112 | } | |
113 | ||
114 | static unsigned int omap2evm_bklight_getmaxlevel(struct lcd_panel *panel) | |
115 | { | |
116 | return 100; | |
117 | } | |
118 | ||
119 | struct lcd_panel omap2evm_panel = { | |
120 | .name = "omap2evm", | |
121 | .config = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC | | |
122 | OMAP_LCDC_INV_HSYNC, | |
123 | ||
124 | .bpp = 16, | |
125 | .data_lines = 18, | |
126 | .x_res = 480, | |
127 | .y_res = 640, | |
128 | .hsw = 3, | |
129 | .hfp = 0, | |
130 | .hbp = 28, | |
131 | .vsw = 2, | |
132 | .vfp = 1, | |
133 | .vbp = 0, | |
134 | ||
135 | .pixel_clock = 20000, | |
136 | ||
137 | .init = omap2evm_panel_init, | |
138 | .cleanup = omap2evm_panel_cleanup, | |
139 | .enable = omap2evm_panel_enable, | |
140 | .disable = omap2evm_panel_disable, | |
141 | .get_caps = omap2evm_panel_get_caps, | |
142 | .set_bklight_level = omap2evm_bklight_setlevel, | |
143 | .get_bklight_level = omap2evm_bklight_getlevel, | |
144 | .get_bklight_max = omap2evm_bklight_getmaxlevel, | |
145 | }; | |
146 | ||
147 | static int omap2evm_panel_probe(struct platform_device *pdev) | |
148 | { | |
149 | omapfb_register_panel(&omap2evm_panel); | |
150 | return 0; | |
151 | } | |
152 | ||
153 | static int omap2evm_panel_remove(struct platform_device *pdev) | |
154 | { | |
155 | return 0; | |
156 | } | |
157 | ||
158 | static int omap2evm_panel_suspend(struct platform_device *pdev, | |
159 | pm_message_t mesg) | |
160 | { | |
161 | return 0; | |
162 | } | |
163 | ||
164 | static int omap2evm_panel_resume(struct platform_device *pdev) | |
165 | { | |
166 | return 0; | |
167 | } | |
168 | ||
169 | struct platform_driver omap2evm_panel_driver = { | |
170 | .probe = omap2evm_panel_probe, | |
171 | .remove = omap2evm_panel_remove, | |
172 | .suspend = omap2evm_panel_suspend, | |
173 | .resume = omap2evm_panel_resume, | |
174 | .driver = { | |
175 | .name = "omap2evm_lcd", | |
176 | .owner = THIS_MODULE, | |
177 | }, | |
178 | }; | |
179 | ||
180 | static int __init omap2evm_panel_drv_init(void) | |
181 | { | |
182 | return platform_driver_register(&omap2evm_panel_driver); | |
183 | } | |
184 | ||
185 | static void __exit omap2evm_panel_drv_exit(void) | |
186 | { | |
187 | platform_driver_unregister(&omap2evm_panel_driver); | |
188 | } | |
189 | ||
190 | module_init(omap2evm_panel_drv_init); | |
191 | module_exit(omap2evm_panel_drv_exit); |