This source file includes following definitions.
- locomolcd_on
- locomolcd_off
- locomolcd_power
- locomolcd_set_intensity
- locomolcd_get_intensity
- locomolcd_suspend
- locomolcd_resume
- locomolcd_probe
- locomolcd_remove
- locomolcd_init
- locomolcd_exit
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14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/delay.h>
17 #include <linux/device.h>
18 #include <linux/interrupt.h>
19 #include <linux/fb.h>
20 #include <linux/backlight.h>
21
22 #include <asm/hardware/locomo.h>
23 #include <asm/irq.h>
24 #include <asm/mach/sharpsl_param.h>
25 #include <asm/mach-types.h>
26
27 #include "../../../arch/arm/mach-sa1100/generic.h"
28
29 static struct backlight_device *locomolcd_bl_device;
30 static struct locomo_dev *locomolcd_dev;
31 static unsigned long locomolcd_flags;
32 #define LOCOMOLCD_SUSPENDED 0x01
33
34 static void locomolcd_on(int comadj)
35 {
36 locomo_gpio_set_dir(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VSHA_ON, 0);
37 locomo_gpio_write(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VSHA_ON, 1);
38 mdelay(2);
39
40 locomo_gpio_set_dir(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VSHD_ON, 0);
41 locomo_gpio_write(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VSHD_ON, 1);
42 mdelay(2);
43
44 locomo_m62332_senddata(locomolcd_dev, comadj, 0);
45 mdelay(5);
46
47 locomo_gpio_set_dir(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VEE_ON, 0);
48 locomo_gpio_write(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VEE_ON, 1);
49 mdelay(10);
50
51
52 locomo_writel(0x01, locomolcd_dev->mapbase + LOCOMO_TC);
53
54
55 locomo_writel(6, locomolcd_dev->mapbase + LOCOMO_CPSD);
56
57
58 locomo_writel((0x04 | 0x01), locomolcd_dev->mapbase + LOCOMO_TC);
59 mdelay(10);
60
61 locomo_gpio_set_dir(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_MOD, 0);
62 locomo_gpio_write(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_MOD, 1);
63 }
64
65 static void locomolcd_off(int comadj)
66 {
67
68 locomo_writel(0x06, locomolcd_dev->mapbase + LOCOMO_TC);
69 mdelay(1);
70
71 locomo_gpio_write(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VSHA_ON, 0);
72 mdelay(110);
73
74 locomo_gpio_write(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VEE_ON, 0);
75 mdelay(700);
76
77
78 locomo_writel(0, locomolcd_dev->mapbase + LOCOMO_TC);
79 locomo_gpio_write(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_MOD, 0);
80 locomo_gpio_write(locomolcd_dev->dev.parent, LOCOMO_GPIO_LCD_VSHD_ON, 0);
81 }
82
83 void locomolcd_power(int on)
84 {
85 int comadj = sharpsl_param.comadj;
86 unsigned long flags;
87
88 local_irq_save(flags);
89
90 if (!locomolcd_dev) {
91 local_irq_restore(flags);
92 return;
93 }
94
95
96 if (comadj == -1 && machine_is_collie())
97 comadj = 128;
98 if (comadj == -1 && machine_is_poodle())
99 comadj = 118;
100
101 if (on)
102 locomolcd_on(comadj);
103 else
104 locomolcd_off(comadj);
105
106 local_irq_restore(flags);
107 }
108 EXPORT_SYMBOL(locomolcd_power);
109
110 static int current_intensity;
111
112 static int locomolcd_set_intensity(struct backlight_device *bd)
113 {
114 int intensity = bd->props.brightness;
115
116 if (bd->props.power != FB_BLANK_UNBLANK)
117 intensity = 0;
118 if (bd->props.fb_blank != FB_BLANK_UNBLANK)
119 intensity = 0;
120 if (locomolcd_flags & LOCOMOLCD_SUSPENDED)
121 intensity = 0;
122
123 switch (intensity) {
124
125
126
127
128 case 0:
129 locomo_frontlight_set(locomolcd_dev, 0, 0, 161);
130 break;
131 case 1:
132 locomo_frontlight_set(locomolcd_dev, 117, 0, 161);
133 break;
134 case 2:
135 locomo_frontlight_set(locomolcd_dev, 163, 0, 148);
136 break;
137 case 3:
138 locomo_frontlight_set(locomolcd_dev, 194, 0, 161);
139 break;
140 case 4:
141 locomo_frontlight_set(locomolcd_dev, 194, 1, 161);
142 break;
143 default:
144 return -ENODEV;
145 }
146 current_intensity = intensity;
147 return 0;
148 }
149
150 static int locomolcd_get_intensity(struct backlight_device *bd)
151 {
152 return current_intensity;
153 }
154
155 static const struct backlight_ops locomobl_data = {
156 .get_brightness = locomolcd_get_intensity,
157 .update_status = locomolcd_set_intensity,
158 };
159
160 #ifdef CONFIG_PM_SLEEP
161 static int locomolcd_suspend(struct device *dev)
162 {
163 locomolcd_flags |= LOCOMOLCD_SUSPENDED;
164 locomolcd_set_intensity(locomolcd_bl_device);
165 return 0;
166 }
167
168 static int locomolcd_resume(struct device *dev)
169 {
170 locomolcd_flags &= ~LOCOMOLCD_SUSPENDED;
171 locomolcd_set_intensity(locomolcd_bl_device);
172 return 0;
173 }
174 #endif
175
176 static SIMPLE_DEV_PM_OPS(locomolcd_pm_ops, locomolcd_suspend, locomolcd_resume);
177
178 static int locomolcd_probe(struct locomo_dev *ldev)
179 {
180 struct backlight_properties props;
181 unsigned long flags;
182
183 local_irq_save(flags);
184 locomolcd_dev = ldev;
185
186 locomo_gpio_set_dir(ldev->dev.parent, LOCOMO_GPIO_FL_VR, 0);
187
188
189
190
191
192
193 if (machine_is_poodle())
194 locomolcd_power(1);
195
196 local_irq_restore(flags);
197
198 memset(&props, 0, sizeof(struct backlight_properties));
199 props.type = BACKLIGHT_RAW;
200 props.max_brightness = 4;
201 locomolcd_bl_device = backlight_device_register("locomo-bl",
202 &ldev->dev, NULL,
203 &locomobl_data, &props);
204
205 if (IS_ERR(locomolcd_bl_device))
206 return PTR_ERR(locomolcd_bl_device);
207
208
209 locomolcd_bl_device->props.brightness = 2;
210 locomolcd_set_intensity(locomolcd_bl_device);
211
212 return 0;
213 }
214
215 static int locomolcd_remove(struct locomo_dev *dev)
216 {
217 unsigned long flags;
218
219 locomolcd_bl_device->props.brightness = 0;
220 locomolcd_bl_device->props.power = 0;
221 locomolcd_set_intensity(locomolcd_bl_device);
222
223 backlight_device_unregister(locomolcd_bl_device);
224 local_irq_save(flags);
225 locomolcd_dev = NULL;
226 local_irq_restore(flags);
227 return 0;
228 }
229
230 static struct locomo_driver poodle_lcd_driver = {
231 .drv = {
232 .name = "locomo-backlight",
233 .pm = &locomolcd_pm_ops,
234 },
235 .devid = LOCOMO_DEVID_BACKLIGHT,
236 .probe = locomolcd_probe,
237 .remove = locomolcd_remove,
238 };
239
240 static int __init locomolcd_init(void)
241 {
242 return locomo_driver_register(&poodle_lcd_driver);
243 }
244
245 static void __exit locomolcd_exit(void)
246 {
247 locomo_driver_unregister(&poodle_lcd_driver);
248 }
249
250 module_init(locomolcd_init);
251 module_exit(locomolcd_exit);
252
253 MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>, Pavel Machek <pavel@ucw.cz>");
254 MODULE_DESCRIPTION("Collie LCD driver");
255 MODULE_LICENSE("GPL");