]>
Commit | Line | Data |
---|---|---|
1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
92e0ed07 JM |
2 | /* |
3 | * Based on drivers/video/omap/lcd_inn1510.c | |
4 | * | |
5 | * LCD panel support for the Amstrad E3 (Delta) videophone. | |
6 | * | |
7 | * Copyright (C) 2006 Jonathan McDowell <noodles@earth.li> | |
92e0ed07 JM |
8 | */ |
9 | ||
10 | #include <linux/module.h> | |
11 | #include <linux/platform_device.h> | |
12 | #include <linux/io.h> | |
13 | #include <linux/delay.h> | |
02f17ffd | 14 | #include <linux/gpio/consumer.h> |
e7210327 | 15 | #include <linux/lcd.h> |
92e0ed07 | 16 | |
0adcbaf7 | 17 | #include <mach/hardware.h> |
91773a00 TV |
18 | |
19 | #include "omapfb.h" | |
92e0ed07 JM |
20 | |
21 | #define AMS_DELTA_DEFAULT_CONTRAST 112 | |
22 | ||
e7210327 JK |
23 | #define AMS_DELTA_MAX_CONTRAST 0x00FF |
24 | #define AMS_DELTA_LCD_POWER 0x0100 | |
25 | ||
26 | ||
27 | /* LCD class device section */ | |
28 | ||
29 | static int ams_delta_lcd; | |
02f17ffd JK |
30 | static struct gpio_desc *gpiod_vblen; |
31 | static struct gpio_desc *gpiod_ndisp; | |
e7210327 JK |
32 | |
33 | static int ams_delta_lcd_set_power(struct lcd_device *dev, int power) | |
34 | { | |
35 | if (power == FB_BLANK_UNBLANK) { | |
36 | if (!(ams_delta_lcd & AMS_DELTA_LCD_POWER)) { | |
37 | omap_writeb(ams_delta_lcd & AMS_DELTA_MAX_CONTRAST, | |
38 | OMAP_PWL_ENABLE); | |
39 | omap_writeb(1, OMAP_PWL_CLK_ENABLE); | |
40 | ams_delta_lcd |= AMS_DELTA_LCD_POWER; | |
41 | } | |
42 | } else { | |
43 | if (ams_delta_lcd & AMS_DELTA_LCD_POWER) { | |
44 | omap_writeb(0, OMAP_PWL_ENABLE); | |
45 | omap_writeb(0, OMAP_PWL_CLK_ENABLE); | |
46 | ams_delta_lcd &= ~AMS_DELTA_LCD_POWER; | |
47 | } | |
48 | } | |
49 | return 0; | |
50 | } | |
51 | ||
52 | static int ams_delta_lcd_set_contrast(struct lcd_device *dev, int value) | |
53 | { | |
54 | if ((value >= 0) && (value <= AMS_DELTA_MAX_CONTRAST)) { | |
55 | omap_writeb(value, OMAP_PWL_ENABLE); | |
56 | ams_delta_lcd &= ~AMS_DELTA_MAX_CONTRAST; | |
57 | ams_delta_lcd |= value; | |
58 | } | |
59 | return 0; | |
60 | } | |
61 | ||
62 | #ifdef CONFIG_LCD_CLASS_DEVICE | |
63 | static int ams_delta_lcd_get_power(struct lcd_device *dev) | |
64 | { | |
65 | if (ams_delta_lcd & AMS_DELTA_LCD_POWER) | |
66 | return FB_BLANK_UNBLANK; | |
67 | else | |
68 | return FB_BLANK_POWERDOWN; | |
69 | } | |
70 | ||
71 | static int ams_delta_lcd_get_contrast(struct lcd_device *dev) | |
72 | { | |
73 | if (!(ams_delta_lcd & AMS_DELTA_LCD_POWER)) | |
74 | return 0; | |
75 | ||
76 | return ams_delta_lcd & AMS_DELTA_MAX_CONTRAST; | |
77 | } | |
78 | ||
79 | static struct lcd_ops ams_delta_lcd_ops = { | |
80 | .get_power = ams_delta_lcd_get_power, | |
81 | .set_power = ams_delta_lcd_set_power, | |
82 | .get_contrast = ams_delta_lcd_get_contrast, | |
83 | .set_contrast = ams_delta_lcd_set_contrast, | |
84 | }; | |
85 | #endif | |
86 | ||
87 | ||
88 | /* omapfb panel section */ | |
89 | ||
92e0ed07 JM |
90 | static int ams_delta_panel_enable(struct lcd_panel *panel) |
91 | { | |
02f17ffd JK |
92 | gpiod_set_value(gpiod_ndisp, 1); |
93 | gpiod_set_value(gpiod_vblen, 1); | |
92e0ed07 JM |
94 | return 0; |
95 | } | |
96 | ||
97 | static void ams_delta_panel_disable(struct lcd_panel *panel) | |
98 | { | |
02f17ffd JK |
99 | gpiod_set_value(gpiod_vblen, 0); |
100 | gpiod_set_value(gpiod_ndisp, 0); | |
92e0ed07 JM |
101 | } |
102 | ||
92e0ed07 JM |
103 | static struct lcd_panel ams_delta_panel = { |
104 | .name = "ams-delta", | |
105 | .config = 0, | |
106 | ||
107 | .bpp = 12, | |
108 | .data_lines = 16, | |
109 | .x_res = 480, | |
110 | .y_res = 320, | |
111 | .pixel_clock = 4687, | |
112 | .hsw = 3, | |
113 | .hfp = 1, | |
114 | .hbp = 1, | |
115 | .vsw = 1, | |
116 | .vfp = 0, | |
117 | .vbp = 0, | |
118 | .pcd = 0, | |
119 | .acb = 37, | |
120 | ||
92e0ed07 JM |
121 | .enable = ams_delta_panel_enable, |
122 | .disable = ams_delta_panel_disable, | |
92e0ed07 JM |
123 | }; |
124 | ||
e7210327 JK |
125 | |
126 | /* platform driver section */ | |
127 | ||
92e0ed07 JM |
128 | static int ams_delta_panel_probe(struct platform_device *pdev) |
129 | { | |
e7210327 | 130 | struct lcd_device *lcd_device = NULL; |
e7210327 JK |
131 | int ret; |
132 | ||
02f17ffd JK |
133 | gpiod_vblen = devm_gpiod_get(&pdev->dev, "vblen", GPIOD_OUT_LOW); |
134 | if (IS_ERR(gpiod_vblen)) { | |
135 | ret = PTR_ERR(gpiod_vblen); | |
136 | dev_err(&pdev->dev, "VBLEN GPIO request failed (%d)\n", ret); | |
137 | return ret; | |
138 | } | |
139 | ||
140 | gpiod_ndisp = devm_gpiod_get(&pdev->dev, "ndisp", GPIOD_OUT_LOW); | |
141 | if (IS_ERR(gpiod_ndisp)) { | |
142 | ret = PTR_ERR(gpiod_ndisp); | |
143 | dev_err(&pdev->dev, "NDISP GPIO request failed (%d)\n", ret); | |
144 | return ret; | |
145 | } | |
146 | ||
147 | #ifdef CONFIG_LCD_CLASS_DEVICE | |
e7210327 JK |
148 | lcd_device = lcd_device_register("omapfb", &pdev->dev, NULL, |
149 | &ams_delta_lcd_ops); | |
150 | ||
151 | if (IS_ERR(lcd_device)) { | |
152 | ret = PTR_ERR(lcd_device); | |
153 | dev_err(&pdev->dev, "failed to register device\n"); | |
154 | return ret; | |
155 | } | |
156 | ||
157 | platform_set_drvdata(pdev, lcd_device); | |
158 | lcd_device->props.max_contrast = AMS_DELTA_MAX_CONTRAST; | |
159 | #endif | |
160 | ||
161 | ams_delta_lcd_set_contrast(lcd_device, AMS_DELTA_DEFAULT_CONTRAST); | |
162 | ams_delta_lcd_set_power(lcd_device, FB_BLANK_UNBLANK); | |
163 | ||
92e0ed07 JM |
164 | omapfb_register_panel(&ams_delta_panel); |
165 | return 0; | |
166 | } | |
167 | ||
f9905441 | 168 | static struct platform_driver ams_delta_panel_driver = { |
92e0ed07 | 169 | .probe = ams_delta_panel_probe, |
92e0ed07 JM |
170 | .driver = { |
171 | .name = "lcd_ams_delta", | |
92e0ed07 JM |
172 | }, |
173 | }; | |
174 | ||
f806f9b6 | 175 | module_platform_driver(ams_delta_panel_driver); |
1bde9f2c AB |
176 | |
177 | MODULE_AUTHOR("Jonathan McDowell <noodles@earth.li>"); | |
178 | MODULE_DESCRIPTION("LCD panel support for the Amstrad E3 (Delta) videophone"); | |
179 | MODULE_LICENSE("GPL"); |