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1/*
2 * Based on drivers/video/omap/lcd_inn1510.c
3 *
4 * LCD panel support for the Amstrad E3 (Delta) videophone.
5 *
6 * Copyright (C) 2006 Jonathan McDowell <noodles@earth.li>
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/io.h>
26#include <linux/delay.h>
27#include <linux/lcd.h>
28#include <linux/gpio.h>
29
30#include <mach/hardware.h>
31#include <mach/board-ams-delta.h>
32
33#include "omapfb.h"
34
35#define AMS_DELTA_DEFAULT_CONTRAST 112
36
37#define AMS_DELTA_MAX_CONTRAST 0x00FF
38#define AMS_DELTA_LCD_POWER 0x0100
39
40
41/* LCD class device section */
42
43static int ams_delta_lcd;
44
45static int ams_delta_lcd_set_power(struct lcd_device *dev, int power)
46{
47 if (power == FB_BLANK_UNBLANK) {
48 if (!(ams_delta_lcd & AMS_DELTA_LCD_POWER)) {
49 omap_writeb(ams_delta_lcd & AMS_DELTA_MAX_CONTRAST,
50 OMAP_PWL_ENABLE);
51 omap_writeb(1, OMAP_PWL_CLK_ENABLE);
52 ams_delta_lcd |= AMS_DELTA_LCD_POWER;
53 }
54 } else {
55 if (ams_delta_lcd & AMS_DELTA_LCD_POWER) {
56 omap_writeb(0, OMAP_PWL_ENABLE);
57 omap_writeb(0, OMAP_PWL_CLK_ENABLE);
58 ams_delta_lcd &= ~AMS_DELTA_LCD_POWER;
59 }
60 }
61 return 0;
62}
63
64static int ams_delta_lcd_set_contrast(struct lcd_device *dev, int value)
65{
66 if ((value >= 0) && (value <= AMS_DELTA_MAX_CONTRAST)) {
67 omap_writeb(value, OMAP_PWL_ENABLE);
68 ams_delta_lcd &= ~AMS_DELTA_MAX_CONTRAST;
69 ams_delta_lcd |= value;
70 }
71 return 0;
72}
73
74#ifdef CONFIG_LCD_CLASS_DEVICE
75static int ams_delta_lcd_get_power(struct lcd_device *dev)
76{
77 if (ams_delta_lcd & AMS_DELTA_LCD_POWER)
78 return FB_BLANK_UNBLANK;
79 else
80 return FB_BLANK_POWERDOWN;
81}
82
83static int ams_delta_lcd_get_contrast(struct lcd_device *dev)
84{
85 if (!(ams_delta_lcd & AMS_DELTA_LCD_POWER))
86 return 0;
87
88 return ams_delta_lcd & AMS_DELTA_MAX_CONTRAST;
89}
90
91static struct lcd_ops ams_delta_lcd_ops = {
92 .get_power = ams_delta_lcd_get_power,
93 .set_power = ams_delta_lcd_set_power,
94 .get_contrast = ams_delta_lcd_get_contrast,
95 .set_contrast = ams_delta_lcd_set_contrast,
96};
97#endif
98
99
100/* omapfb panel section */
101
102static const struct gpio _gpios[] = {
103 {
104 .gpio = AMS_DELTA_GPIO_PIN_LCD_VBLEN,
105 .flags = GPIOF_OUT_INIT_LOW,
106 .label = "lcd_vblen",
107 },
108 {
109 .gpio = AMS_DELTA_GPIO_PIN_LCD_NDISP,
110 .flags = GPIOF_OUT_INIT_LOW,
111 .label = "lcd_ndisp",
112 },
113};
114
115static int ams_delta_panel_init(struct lcd_panel *panel,
116 struct omapfb_device *fbdev)
117{
118 return gpio_request_array(_gpios, ARRAY_SIZE(_gpios));
119}
120
121static void ams_delta_panel_cleanup(struct lcd_panel *panel)
122{
123 gpio_free_array(_gpios, ARRAY_SIZE(_gpios));
124}
125
126static int ams_delta_panel_enable(struct lcd_panel *panel)
127{
128 gpio_set_value(AMS_DELTA_GPIO_PIN_LCD_NDISP, 1);
129 gpio_set_value(AMS_DELTA_GPIO_PIN_LCD_VBLEN, 1);
130 return 0;
131}
132
133static void ams_delta_panel_disable(struct lcd_panel *panel)
134{
135 gpio_set_value(AMS_DELTA_GPIO_PIN_LCD_VBLEN, 0);
136 gpio_set_value(AMS_DELTA_GPIO_PIN_LCD_NDISP, 0);
137}
138
139static unsigned long ams_delta_panel_get_caps(struct lcd_panel *panel)
140{
141 return 0;
142}
143
144static struct lcd_panel ams_delta_panel = {
145 .name = "ams-delta",
146 .config = 0,
147
148 .bpp = 12,
149 .data_lines = 16,
150 .x_res = 480,
151 .y_res = 320,
152 .pixel_clock = 4687,
153 .hsw = 3,
154 .hfp = 1,
155 .hbp = 1,
156 .vsw = 1,
157 .vfp = 0,
158 .vbp = 0,
159 .pcd = 0,
160 .acb = 37,
161
162 .init = ams_delta_panel_init,
163 .cleanup = ams_delta_panel_cleanup,
164 .enable = ams_delta_panel_enable,
165 .disable = ams_delta_panel_disable,
166 .get_caps = ams_delta_panel_get_caps,
167};
168
169
170/* platform driver section */
171
172static int ams_delta_panel_probe(struct platform_device *pdev)
173{
174 struct lcd_device *lcd_device = NULL;
175#ifdef CONFIG_LCD_CLASS_DEVICE
176 int ret;
177
178 lcd_device = lcd_device_register("omapfb", &pdev->dev, NULL,
179 &ams_delta_lcd_ops);
180
181 if (IS_ERR(lcd_device)) {
182 ret = PTR_ERR(lcd_device);
183 dev_err(&pdev->dev, "failed to register device\n");
184 return ret;
185 }
186
187 platform_set_drvdata(pdev, lcd_device);
188 lcd_device->props.max_contrast = AMS_DELTA_MAX_CONTRAST;
189#endif
190
191 ams_delta_lcd_set_contrast(lcd_device, AMS_DELTA_DEFAULT_CONTRAST);
192 ams_delta_lcd_set_power(lcd_device, FB_BLANK_UNBLANK);
193
194 omapfb_register_panel(&ams_delta_panel);
195 return 0;
196}
197
198static int ams_delta_panel_remove(struct platform_device *pdev)
199{
200 return 0;
201}
202
203static int ams_delta_panel_suspend(struct platform_device *pdev,
204 pm_message_t mesg)
205{
206 return 0;
207}
208
209static int ams_delta_panel_resume(struct platform_device *pdev)
210{
211 return 0;
212}
213
214static struct platform_driver ams_delta_panel_driver = {
215 .probe = ams_delta_panel_probe,
216 .remove = ams_delta_panel_remove,
217 .suspend = ams_delta_panel_suspend,
218 .resume = ams_delta_panel_resume,
219 .driver = {
220 .name = "lcd_ams_delta",
221 },
222};
223
224module_platform_driver(ams_delta_panel_driver);
1// SPDX-License-Identifier: GPL-2.0-or-later
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>
8 */
9
10#include <linux/module.h>
11#include <linux/platform_device.h>
12#include <linux/io.h>
13#include <linux/delay.h>
14#include <linux/gpio/consumer.h>
15#include <linux/lcd.h>
16
17#include <linux/soc/ti/omap1-io.h>
18
19#include "omapfb.h"
20
21#define AMS_DELTA_DEFAULT_CONTRAST 112
22
23#define AMS_DELTA_MAX_CONTRAST 0x00FF
24#define AMS_DELTA_LCD_POWER 0x0100
25
26
27/* LCD class device section */
28
29static int ams_delta_lcd;
30static struct gpio_desc *gpiod_vblen;
31static struct gpio_desc *gpiod_ndisp;
32
33static 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
52static 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
63static 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
71static 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
79static 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
90static int ams_delta_panel_enable(struct lcd_panel *panel)
91{
92 gpiod_set_value(gpiod_ndisp, 1);
93 gpiod_set_value(gpiod_vblen, 1);
94 return 0;
95}
96
97static void ams_delta_panel_disable(struct lcd_panel *panel)
98{
99 gpiod_set_value(gpiod_vblen, 0);
100 gpiod_set_value(gpiod_ndisp, 0);
101}
102
103static 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
121 .enable = ams_delta_panel_enable,
122 .disable = ams_delta_panel_disable,
123};
124
125
126/* platform driver section */
127
128static int ams_delta_panel_probe(struct platform_device *pdev)
129{
130 struct lcd_device *lcd_device = NULL;
131
132 gpiod_vblen = devm_gpiod_get(&pdev->dev, "vblen", GPIOD_OUT_LOW);
133 if (IS_ERR(gpiod_vblen))
134 return dev_err_probe(&pdev->dev, PTR_ERR(gpiod_vblen),
135 "VBLEN GPIO request failed\n");
136
137 gpiod_ndisp = devm_gpiod_get(&pdev->dev, "ndisp", GPIOD_OUT_LOW);
138 if (IS_ERR(gpiod_ndisp))
139 return dev_err_probe(&pdev->dev, PTR_ERR(gpiod_ndisp),
140 "NDISP GPIO request failed\n");
141
142#ifdef CONFIG_LCD_CLASS_DEVICE
143 lcd_device = lcd_device_register("omapfb", &pdev->dev, NULL,
144 &ams_delta_lcd_ops);
145
146 if (IS_ERR(lcd_device)) {
147 int ret = PTR_ERR(lcd_device);
148
149 dev_err(&pdev->dev, "failed to register device\n");
150 return ret;
151 }
152
153 platform_set_drvdata(pdev, lcd_device);
154 lcd_device->props.max_contrast = AMS_DELTA_MAX_CONTRAST;
155#endif
156
157 ams_delta_lcd_set_contrast(lcd_device, AMS_DELTA_DEFAULT_CONTRAST);
158 ams_delta_lcd_set_power(lcd_device, FB_BLANK_UNBLANK);
159
160 omapfb_register_panel(&ams_delta_panel);
161 return 0;
162}
163
164static struct platform_driver ams_delta_panel_driver = {
165 .probe = ams_delta_panel_probe,
166 .driver = {
167 .name = "lcd_ams_delta",
168 },
169};
170
171module_platform_driver(ams_delta_panel_driver);
172
173MODULE_AUTHOR("Jonathan McDowell <noodles@earth.li>");
174MODULE_DESCRIPTION("LCD panel support for the Amstrad E3 (Delta) videophone");
175MODULE_LICENSE("GPL");