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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 | ||
ce491cf8 | 28 | #include <plat/mux.h> |
2a8729c4 SS |
29 | #include <asm/mach-types.h> |
30 | ||
91773a00 TV |
31 | #include "omapfb.h" |
32 | ||
2a8729c4 SS |
33 | #define LCD_PANEL_ENABLE_GPIO 153 |
34 | #define LCD_PANEL_LR 2 | |
35 | #define LCD_PANEL_UD 3 | |
36 | #define LCD_PANEL_INI 152 | |
37 | #define LCD_PANEL_QVGA 154 | |
38 | #define LCD_PANEL_RESB 155 | |
39 | ||
40 | #define ENABLE_VDAC_DEDICATED 0x03 | |
41 | #define ENABLE_VDAC_DEV_GRP 0x20 | |
42 | #define ENABLE_VPLL2_DEDICATED 0x05 | |
43 | #define ENABLE_VPLL2_DEV_GRP 0xE0 | |
44 | ||
45 | #define TWL_LED_LEDEN 0x00 | |
46 | #define TWL_PWMA_PWMAON 0x00 | |
47 | #define TWL_PWMA_PWMAOFF 0x01 | |
48 | ||
49 | static unsigned int bklight_level; | |
50 | ||
51 | static int omap3evm_panel_init(struct lcd_panel *panel, | |
52 | struct omapfb_device *fbdev) | |
53 | { | |
54 | gpio_request(LCD_PANEL_LR, "LCD lr"); | |
55 | gpio_request(LCD_PANEL_UD, "LCD ud"); | |
56 | gpio_request(LCD_PANEL_INI, "LCD ini"); | |
57 | gpio_request(LCD_PANEL_RESB, "LCD resb"); | |
58 | gpio_request(LCD_PANEL_QVGA, "LCD qvga"); | |
59 | ||
60 | gpio_direction_output(LCD_PANEL_RESB, 1); | |
61 | gpio_direction_output(LCD_PANEL_INI, 1); | |
62 | gpio_direction_output(LCD_PANEL_QVGA, 0); | |
63 | gpio_direction_output(LCD_PANEL_LR, 1); | |
64 | gpio_direction_output(LCD_PANEL_UD, 1); | |
65 | ||
66 | twl4030_i2c_write_u8(TWL4030_MODULE_LED, 0x11, TWL_LED_LEDEN); | |
67 | twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x01, TWL_PWMA_PWMAON); | |
68 | twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, 0x02, TWL_PWMA_PWMAOFF); | |
69 | bklight_level = 100; | |
70 | ||
71 | return 0; | |
72 | } | |
73 | ||
74 | static void omap3evm_panel_cleanup(struct lcd_panel *panel) | |
75 | { | |
76 | gpio_free(LCD_PANEL_QVGA); | |
77 | gpio_free(LCD_PANEL_RESB); | |
78 | gpio_free(LCD_PANEL_INI); | |
79 | gpio_free(LCD_PANEL_UD); | |
80 | gpio_free(LCD_PANEL_LR); | |
81 | } | |
82 | ||
83 | static int omap3evm_panel_enable(struct lcd_panel *panel) | |
84 | { | |
85 | gpio_set_value(LCD_PANEL_ENABLE_GPIO, 0); | |
86 | return 0; | |
87 | } | |
88 | ||
89 | static void omap3evm_panel_disable(struct lcd_panel *panel) | |
90 | { | |
91 | gpio_set_value(LCD_PANEL_ENABLE_GPIO, 1); | |
92 | } | |
93 | ||
94 | static unsigned long omap3evm_panel_get_caps(struct lcd_panel *panel) | |
95 | { | |
96 | return 0; | |
97 | } | |
98 | ||
99 | static int omap3evm_bklight_setlevel(struct lcd_panel *panel, | |
100 | unsigned int level) | |
101 | { | |
102 | u8 c; | |
103 | if ((level >= 0) && (level <= 100)) { | |
104 | c = (125 * (100 - level)) / 100 + 2; | |
105 | twl4030_i2c_write_u8(TWL4030_MODULE_PWMA, c, TWL_PWMA_PWMAOFF); | |
106 | bklight_level = level; | |
107 | } | |
108 | return 0; | |
109 | } | |
110 | ||
111 | static unsigned int omap3evm_bklight_getlevel(struct lcd_panel *panel) | |
112 | { | |
113 | return bklight_level; | |
114 | } | |
115 | ||
116 | static unsigned int omap3evm_bklight_getmaxlevel(struct lcd_panel *panel) | |
117 | { | |
118 | return 100; | |
119 | } | |
120 | ||
121 | struct lcd_panel omap3evm_panel = { | |
122 | .name = "omap3evm", | |
123 | .config = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC | | |
124 | OMAP_LCDC_INV_HSYNC, | |
125 | ||
126 | .bpp = 16, | |
127 | .data_lines = 18, | |
128 | .x_res = 480, | |
129 | .y_res = 640, | |
130 | .hsw = 3, /* hsync_len (4) - 1 */ | |
131 | .hfp = 3, /* right_margin (4) - 1 */ | |
132 | .hbp = 39, /* left_margin (40) - 1 */ | |
133 | .vsw = 1, /* vsync_len (2) - 1 */ | |
134 | .vfp = 2, /* lower_margin */ | |
135 | .vbp = 7, /* upper_margin (8) - 1 */ | |
136 | ||
137 | .pixel_clock = 26000, | |
138 | ||
139 | .init = omap3evm_panel_init, | |
140 | .cleanup = omap3evm_panel_cleanup, | |
141 | .enable = omap3evm_panel_enable, | |
142 | .disable = omap3evm_panel_disable, | |
143 | .get_caps = omap3evm_panel_get_caps, | |
144 | .set_bklight_level = omap3evm_bklight_setlevel, | |
145 | .get_bklight_level = omap3evm_bklight_getlevel, | |
146 | .get_bklight_max = omap3evm_bklight_getmaxlevel, | |
147 | }; | |
148 | ||
149 | static int omap3evm_panel_probe(struct platform_device *pdev) | |
150 | { | |
151 | omapfb_register_panel(&omap3evm_panel); | |
152 | return 0; | |
153 | } | |
154 | ||
155 | static int omap3evm_panel_remove(struct platform_device *pdev) | |
156 | { | |
157 | return 0; | |
158 | } | |
159 | ||
160 | static int omap3evm_panel_suspend(struct platform_device *pdev, | |
161 | pm_message_t mesg) | |
162 | { | |
163 | return 0; | |
164 | } | |
165 | ||
166 | static int omap3evm_panel_resume(struct platform_device *pdev) | |
167 | { | |
168 | return 0; | |
169 | } | |
170 | ||
171 | struct platform_driver omap3evm_panel_driver = { | |
172 | .probe = omap3evm_panel_probe, | |
173 | .remove = omap3evm_panel_remove, | |
174 | .suspend = omap3evm_panel_suspend, | |
175 | .resume = omap3evm_panel_resume, | |
176 | .driver = { | |
177 | .name = "omap3evm_lcd", | |
178 | .owner = THIS_MODULE, | |
179 | }, | |
180 | }; | |
181 | ||
182 | static int __init omap3evm_panel_drv_init(void) | |
183 | { | |
184 | return platform_driver_register(&omap3evm_panel_driver); | |
185 | } | |
186 | ||
187 | static void __exit omap3evm_panel_drv_exit(void) | |
188 | { | |
189 | platform_driver_unregister(&omap3evm_panel_driver); | |
190 | } | |
191 | ||
192 | module_init(omap3evm_panel_drv_init); | |
193 | module_exit(omap3evm_panel_drv_exit); |