1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Backlight control code for Sharp Zaurus SL-5500
*
* Copyright 2005 John Lenz <lenz@cs.wisc.edu>
* Maintainer: Pavel Machek <pavel@ucw.cz> (unless John wants to :-)
*
* This driver assumes single CPU. That's okay, because collie is
* slightly old hardware, and no one is going to retrofit second CPU to
* old PDA.
*/
/* LCD power functions */
#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/fb.h>
#include <linux/backlight.h>
#include <asm/hardware/locomo.h>
#include <asm/irq.h>
#include <asm/mach/sharpsl_param.h>
#include <asm/mach-types.h>
#include "../../../arch/arm/mach-sa1100/generic.h"
static struct backlight_device *locomolcd_bl_device;
static struct locomo_dev *locomolcd_dev;
static unsigned long locomolcd_flags;
#define LOCOMOLCD_SUSPENDED 0x01
static void locomolcd_on(int comadj)
{
locomo_gpio_set_dir(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VSHA_ON, 0);
locomo_gpio_write(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VSHA_ON, 1);
mdelay(2);
locomo_gpio_set_dir(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VSHD_ON, 0);
locomo_gpio_write(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VSHD_ON, 1);
mdelay(2);
locomo_m62332_senddata(locomolcd_dev, comadj, 0);
mdelay(5);
locomo_gpio_set_dir(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VEE_ON, 0);
locomo_gpio_write(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VEE_ON, 1);
mdelay(10);
/* TFTCRST | CPSOUT=0 | CPSEN */
locomo_writel(0x01, locomolcd_dev->mapbase + LOCOMO_TC);
/* Set CPSD */
locomo_writel(6, locomolcd_dev->mapbase + LOCOMO_CPSD);
/* TFTCRST | CPSOUT=0 | CPSEN */
locomo_writel((0x04 | 0x01), locomolcd_dev->mapbase + LOCOMO_TC);
mdelay(10);
locomo_gpio_set_dir(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_MOD, 0);
locomo_gpio_write(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_MOD, 1);
}
static void locomolcd_off(int comadj)
{
/* TFTCRST=1 | CPSOUT=1 | CPSEN = 0 */
locomo_writel(0x06, locomolcd_dev->mapbase + LOCOMO_TC);
mdelay(1);
locomo_gpio_write(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VSHA_ON, 0);
mdelay(110);
locomo_gpio_write(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VEE_ON, 0);
mdelay(700);
/* TFTCRST=0 | CPSOUT=0 | CPSEN = 0 */
locomo_writel(0, locomolcd_dev->mapbase + LOCOMO_TC);
locomo_gpio_write(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_MOD, 0);
locomo_gpio_write(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VSHD_ON, 0);
}
void locomolcd_power(int on)
{
int comadj = sharpsl_param.comadj;
unsigned long flags;
local_irq_save(flags);
if (!locomolcd_dev) {
local_irq_restore(flags);
return;
}
/* read comadj */
if (comadj == -1 && machine_is_collie())
comadj = 128;
if (comadj == -1 && machine_is_poodle())
comadj = 118;
if (on)
locomolcd_on(comadj);
else
locomolcd_off(comadj);
local_irq_restore(flags);
}
EXPORT_SYMBOL(locomolcd_power);
static int current_intensity;
static int locomolcd_set_intensity(struct backlight_device *bd)
{
int intensity = bd->props.brightness;
if (bd->props.power != FB_BLANK_UNBLANK)
intensity = 0;
if (bd->props.fb_blank != FB_BLANK_UNBLANK)
intensity = 0;
if (locomolcd_flags & LOCOMOLCD_SUSPENDED)
intensity = 0;
switch (intensity) {
/*
* AC and non-AC are handled differently,
* but produce same results in sharp code?
*/
case 0:
locomo_frontlight_set(locomolcd_dev, 0, 0, 161);
break;
case 1:
locomo_frontlight_set(locomolcd_dev, 117, 0, 161);
break;
case 2:
locomo_frontlight_set(locomolcd_dev, 163, 0, 148);
break;
case 3:
locomo_frontlight_set(locomolcd_dev, 194, 0, 161);
break;
case 4:
locomo_frontlight_set(locomolcd_dev, 194, 1, 161);
break;
default:
return -ENODEV;
}
current_intensity = intensity;
return 0;
}
static int locomolcd_get_intensity(struct backlight_device *bd)
{
return current_intensity;
}
static const struct backlight_ops locomobl_data = {
.get_brightness = locomolcd_get_intensity,
.update_status = locomolcd_set_intensity,
};
#ifdef CONFIG_PM_SLEEP
static int locomolcd_suspend(struct device *dev)
{
locomolcd_flags |= LOCOMOLCD_SUSPENDED;
locomolcd_set_intensity(locomolcd_bl_device);
return 0;
}
static int locomolcd_resume(struct device *dev)
{
locomolcd_flags &= ~LOCOMOLCD_SUSPENDED;
locomolcd_set_intensity(locomolcd_bl_device);
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(locomolcd_pm_ops, locomolcd_suspend, locomolcd_resume);
static int locomolcd_probe(struct locomo_dev *ldev)
{
struct backlight_properties props;
unsigned long flags;
local_irq_save(flags);
locomolcd_dev = ldev;
locomo_gpio_set_dir(ldev->dev.parent, LOCOMO_GPIO_FL_VR, 0);
/*
* the poodle_lcd_power function is called for the first time
* from fs_initcall, which is before locomo is activated.
* We need to recall poodle_lcd_power here
*/
if (machine_is_poodle())
locomolcd_power(1);
local_irq_restore(flags);
memset(&props, 0, sizeof(struct backlight_properties));
props.type = BACKLIGHT_RAW;
props.max_brightness = 4;
locomolcd_bl_device = backlight_device_register("locomo-bl",
&ldev->dev, NULL,
&locomobl_data, &props);
if (IS_ERR(locomolcd_bl_device))
return PTR_ERR(locomolcd_bl_device);
/* Set up frontlight so that screen is readable */
locomolcd_bl_device->props.brightness = 2;
locomolcd_set_intensity(locomolcd_bl_device);
return 0;
}
static int locomolcd_remove(struct locomo_dev *dev)
{
unsigned long flags;
locomolcd_bl_device->props.brightness = 0;
locomolcd_bl_device->props.power = 0;
locomolcd_set_intensity(locomolcd_bl_device);
backlight_device_unregister(locomolcd_bl_device);
local_irq_save(flags);
locomolcd_dev = NULL;
local_irq_restore(flags);
return 0;
}
static struct locomo_driver poodle_lcd_driver = {
.drv = {
.name = "locomo-backlight",
.pm = &locomolcd_pm_ops,
},
.devid = LOCOMO_DEVID_BACKLIGHT,
.probe = locomolcd_probe,
.remove = locomolcd_remove,
};
static int __init locomolcd_init(void)
{
return locomo_driver_register(&poodle_lcd_driver);
}
static void __exit locomolcd_exit(void)
{
locomo_driver_unregister(&poodle_lcd_driver);
}
module_init(locomolcd_init);
module_exit(locomolcd_exit);
MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>, Pavel Machek <pavel@ucw.cz>");
MODULE_DESCRIPTION("Collie LCD driver");
MODULE_LICENSE("GPL");
|
