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8fea8844 SM |
1 | /* |
2 | * LCD panel support for the TI LDP board | |
3 | * | |
4 | * Copyright (C) 2007 WindRiver | |
5 | * Author: Stanley Miao <stanley.miao@windriver.com> | |
6 | * | |
7 | * Derived from drivers/video/omap/lcd-2430sdp.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/delay.h> | |
ebeb53e1 | 27 | #include <linux/i2c/twl.h> |
8fea8844 | 28 | |
1bc857f7 | 29 | #include <asm/gpio.h> |
ce491cf8 | 30 | #include <plat/mux.h> |
8fea8844 SM |
31 | #include <asm/mach-types.h> |
32 | ||
91773a00 TV |
33 | #include "omapfb.h" |
34 | ||
8fea8844 SM |
35 | #define LCD_PANEL_BACKLIGHT_GPIO (15 + OMAP_MAX_GPIO_LINES) |
36 | #define LCD_PANEL_ENABLE_GPIO (7 + OMAP_MAX_GPIO_LINES) | |
37 | ||
38 | #define LCD_PANEL_RESET_GPIO 55 | |
39 | #define LCD_PANEL_QVGA_GPIO 56 | |
40 | ||
41 | #ifdef CONFIG_FB_OMAP_LCD_VGA | |
42 | #define LCD_XRES 480 | |
43 | #define LCD_YRES 640 | |
44 | #define LCD_PIXCLOCK_MAX 41700 | |
45 | #else | |
46 | #define LCD_XRES 240 | |
47 | #define LCD_YRES 320 | |
48 | #define LCD_PIXCLOCK_MAX 185186 | |
49 | #endif | |
50 | ||
51 | #define PM_RECEIVER TWL4030_MODULE_PM_RECEIVER | |
52 | #define ENABLE_VAUX2_DEDICATED 0x09 | |
53 | #define ENABLE_VAUX2_DEV_GRP 0x20 | |
54 | #define ENABLE_VAUX3_DEDICATED 0x03 | |
55 | #define ENABLE_VAUX3_DEV_GRP 0x20 | |
56 | ||
57 | #define ENABLE_VPLL2_DEDICATED 0x05 | |
58 | #define ENABLE_VPLL2_DEV_GRP 0xE0 | |
59 | #define TWL4030_VPLL2_DEV_GRP 0x33 | |
60 | #define TWL4030_VPLL2_DEDICATED 0x36 | |
61 | ||
ebeb53e1 | 62 | #define t2_out(c, r, v) twl_i2c_write_u8(c, r, v) |
8fea8844 SM |
63 | |
64 | ||
65 | static int ldp_panel_init(struct lcd_panel *panel, | |
66 | struct omapfb_device *fbdev) | |
67 | { | |
68 | gpio_request(LCD_PANEL_RESET_GPIO, "lcd reset"); | |
69 | gpio_request(LCD_PANEL_QVGA_GPIO, "lcd qvga"); | |
70 | gpio_request(LCD_PANEL_ENABLE_GPIO, "lcd panel"); | |
71 | gpio_request(LCD_PANEL_BACKLIGHT_GPIO, "lcd backlight"); | |
72 | ||
73 | gpio_direction_output(LCD_PANEL_QVGA_GPIO, 0); | |
74 | gpio_direction_output(LCD_PANEL_RESET_GPIO, 0); | |
75 | gpio_direction_output(LCD_PANEL_ENABLE_GPIO, 0); | |
76 | gpio_direction_output(LCD_PANEL_BACKLIGHT_GPIO, 0); | |
77 | ||
78 | #ifdef CONFIG_FB_OMAP_LCD_VGA | |
79 | gpio_set_value(LCD_PANEL_QVGA_GPIO, 0); | |
80 | #else | |
81 | gpio_set_value(LCD_PANEL_QVGA_GPIO, 1); | |
82 | #endif | |
83 | gpio_set_value(LCD_PANEL_RESET_GPIO, 1); | |
84 | ||
85 | return 0; | |
86 | } | |
87 | ||
88 | static void ldp_panel_cleanup(struct lcd_panel *panel) | |
89 | { | |
90 | gpio_free(LCD_PANEL_BACKLIGHT_GPIO); | |
91 | gpio_free(LCD_PANEL_ENABLE_GPIO); | |
92 | gpio_free(LCD_PANEL_QVGA_GPIO); | |
93 | gpio_free(LCD_PANEL_RESET_GPIO); | |
94 | } | |
95 | ||
96 | static int ldp_panel_enable(struct lcd_panel *panel) | |
97 | { | |
98 | if (0 != t2_out(PM_RECEIVER, ENABLE_VPLL2_DEDICATED, | |
99 | TWL4030_VPLL2_DEDICATED)) | |
100 | return -EIO; | |
101 | if (0 != t2_out(PM_RECEIVER, ENABLE_VPLL2_DEV_GRP, | |
102 | TWL4030_VPLL2_DEV_GRP)) | |
103 | return -EIO; | |
104 | ||
105 | gpio_direction_output(LCD_PANEL_ENABLE_GPIO, 1); | |
106 | gpio_direction_output(LCD_PANEL_BACKLIGHT_GPIO, 1); | |
107 | ||
108 | if (0 != t2_out(PM_RECEIVER, ENABLE_VAUX3_DEDICATED, | |
109 | TWL4030_VAUX3_DEDICATED)) | |
110 | return -EIO; | |
111 | if (0 != t2_out(PM_RECEIVER, ENABLE_VAUX3_DEV_GRP, | |
112 | TWL4030_VAUX3_DEV_GRP)) | |
113 | return -EIO; | |
114 | ||
115 | return 0; | |
116 | } | |
117 | ||
118 | static void ldp_panel_disable(struct lcd_panel *panel) | |
119 | { | |
120 | gpio_direction_output(LCD_PANEL_ENABLE_GPIO, 0); | |
121 | gpio_direction_output(LCD_PANEL_BACKLIGHT_GPIO, 0); | |
122 | ||
123 | t2_out(PM_RECEIVER, 0x0, TWL4030_VPLL2_DEDICATED); | |
124 | t2_out(PM_RECEIVER, 0x0, TWL4030_VPLL2_DEV_GRP); | |
125 | msleep(4); | |
126 | } | |
127 | ||
128 | static unsigned long ldp_panel_get_caps(struct lcd_panel *panel) | |
129 | { | |
130 | return 0; | |
131 | } | |
132 | ||
133 | struct lcd_panel ldp_panel = { | |
134 | .name = "ldp", | |
135 | .config = OMAP_LCDC_PANEL_TFT | OMAP_LCDC_INV_VSYNC | | |
136 | OMAP_LCDC_INV_HSYNC, | |
137 | ||
138 | .bpp = 16, | |
139 | .data_lines = 18, | |
140 | .x_res = LCD_XRES, | |
141 | .y_res = LCD_YRES, | |
142 | .hsw = 3, /* hsync_len (4) - 1 */ | |
143 | .hfp = 3, /* right_margin (4) - 1 */ | |
144 | .hbp = 39, /* left_margin (40) - 1 */ | |
145 | .vsw = 1, /* vsync_len (2) - 1 */ | |
146 | .vfp = 2, /* lower_margin */ | |
147 | .vbp = 7, /* upper_margin (8) - 1 */ | |
148 | ||
149 | .pixel_clock = LCD_PIXCLOCK_MAX, | |
150 | ||
151 | .init = ldp_panel_init, | |
152 | .cleanup = ldp_panel_cleanup, | |
153 | .enable = ldp_panel_enable, | |
154 | .disable = ldp_panel_disable, | |
155 | .get_caps = ldp_panel_get_caps, | |
156 | }; | |
157 | ||
158 | static int ldp_panel_probe(struct platform_device *pdev) | |
159 | { | |
160 | omapfb_register_panel(&ldp_panel); | |
161 | return 0; | |
162 | } | |
163 | ||
164 | static int ldp_panel_remove(struct platform_device *pdev) | |
165 | { | |
166 | return 0; | |
167 | } | |
168 | ||
169 | static int ldp_panel_suspend(struct platform_device *pdev, pm_message_t mesg) | |
170 | { | |
171 | return 0; | |
172 | } | |
173 | ||
174 | static int ldp_panel_resume(struct platform_device *pdev) | |
175 | { | |
176 | return 0; | |
177 | } | |
178 | ||
179 | struct platform_driver ldp_panel_driver = { | |
180 | .probe = ldp_panel_probe, | |
181 | .remove = ldp_panel_remove, | |
182 | .suspend = ldp_panel_suspend, | |
183 | .resume = ldp_panel_resume, | |
184 | .driver = { | |
185 | .name = "ldp_lcd", | |
186 | .owner = THIS_MODULE, | |
187 | }, | |
188 | }; | |
189 | ||
190 | static int __init ldp_panel_drv_init(void) | |
191 | { | |
192 | return platform_driver_register(&ldp_panel_driver); | |
193 | } | |
194 | ||
195 | static void __exit ldp_panel_drv_exit(void) | |
196 | { | |
197 | platform_driver_unregister(&ldp_panel_driver); | |
198 | } | |
199 | ||
200 | module_init(ldp_panel_drv_init); | |
201 | module_exit(ldp_panel_drv_exit); |