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
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
|
#
# Patch managed by http://www.holgerschurig.de/patcher.html
#
--- linux-2.6.16/arch/arm/mach-pxa/ezx.c~ezx-backlight-r1.patch
+++ linux-2.6.16/arch/arm/mach-pxa/ezx.c
@@ -274,34 +274,9 @@
.udc_command = ezx_udc_command,
};
-/* pxafb */
-
-#define BKLIGHT_PRESCALE 2
-#define BKLIGHT_PERIOD 49
-#define DEFAULT_DUTYCYCLE 25
-#define MAX_DUTYCYCLE (BKLIGHT_PERIOD+1)
-#define MIN_DUTYCYCLE 0
-
-static void pxafb_backlight_power(int on)
-{
- if (on) {
- CKEN |= CKEN0_PWM0;
- PWM_CTRL0 = BKLIGHT_PRESCALE;
- PWM_PERVAL0 = BKLIGHT_PERIOD;
- PWM_PWDUTY0 = DEFAULT_DUTYCYCLE;
-
- GPDR0 |= 0x00010000; //PWM0 is GPIO16
- pxa_gpio_mode(GPIO16_PWM0_MD);
- } else {
- PWM_PWDUTY0 = 0;
- GAFR0_U &= 0xfffffffc;
- GPDR0 &= 0xfffeffff; /* set gpio16 (pwm0) as input */
- CKEN &= ~CKEN0_PWM0;
- PWM_PWDUTY0 = MIN_DUTYCYCLE;
- }
-}
-
-//#define mdelay(x) udelay((x)*1000)
+/*
+ * EZX PXA Framebuffer
+ */
static void pxafb_lcd_power(int on)
{
@@ -326,35 +301,24 @@
.xres = 240,
.yres = 320,
.bpp = 16,
-
.hsync_len = 10,
.left_margin = 20,
.right_margin = 10,
-
.vsync_len = 2,
.upper_margin = 3,
.lower_margin = 2,
-
.sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
-
.lccr0 = 0x002008F8,
.lccr3 = 0x0430FF09,
-
- .pxafb_backlight_power = &pxafb_backlight_power,
- .pxafb_lcd_power = &pxafb_lcd_power,
-};
-
-
-/* backlight for lcd */
-
-static struct resource ezx_backlight_resources[] = {
+ .pxafb_lcd_power= &pxafb_lcd_power,
};
-static struct platform_device ezx_backlight_device = {
- .name = "ezx-lcd-backlight",
+/*
+ * EZX LCD Backlight
+ */
+static struct platform_device ezxbacklight_device = {
+ .name = "ezx-bl",
.id = -1,
- .resource = ezx_backlight_resources,
- .num_resources = ARRAY_SIZE(ezx_backlight_resources),
};
#ifdef CONFIG_PXA_EZX_E680
@@ -786,6 +750,7 @@
static struct platform_device *devices[] __initdata = {
&ezx_bp_device,
+ &ezxbacklight_device,
#ifdef CONFIG_PXA_EZX_E680
&e680led_device,
#endif
--- linux-2.6.16/drivers/video/backlight/Kconfig~ezx-backlight-r1.patch
+++ linux-2.6.16/drivers/video/backlight/Kconfig
@@ -58,3 +58,12 @@
If you have a HP Jornada 680, say y to enable the
backlight driver.
+config BACKLIGHT_EZX
+ tristate "Motorola EXZ Backlight Driver (A780/E680/E680i)"
+ depends on BACKLIGHT_DEVICE && PXA_EZX
+ default y
+ help
+ If you have a Motorola A780 or E680(i), say y to enable the
+ backlight driver.
+
+
--- linux-2.6.16/drivers/video/backlight/Makefile~ezx-backlight-r1.patch
+++ linux-2.6.16/drivers/video/backlight/Makefile
@@ -5,3 +5,5 @@
obj-$(CONFIG_BACKLIGHT_CORGI) += corgi_bl.o
obj-$(CONFIG_BACKLIGHT_HP680) += hp680_bl.o
obj-$(CONFIG_SHARP_LOCOMO) += locomolcd.o
+obj-$(CONFIG_BACKLIGHT_EZX) += ezx_bl.o
+
--- /dev/null
+++ linux-2.6.16/drivers/video/backlight/ezx_bl.c
@@ -0,0 +1,161 @@
+/*
+ * Backlight Driver for Motorola A780 and E680(i) GSM Phones.
+ *
+ * Copyright 2006 Vanille Media
+ *
+ * Author: Michael Lauer <mickey@Vanille.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include <linux/fb.h>
+#include <linux/backlight.h>
+
+#include <asm/arch/pxa-regs.h>
+#include <asm/arch/ezx.h>
+
+#define EZX_MIN_INTENSITY 00
+#define EZX_MAX_INTENSITY 50
+#define EZX_DEFAULT_INTENSITY 25
+
+static spinlock_t bl_lock = SPIN_LOCK_UNLOCKED;
+static struct backlight_properties ezxbl_data;
+static struct backlight_device *ezx_backlight_device;
+static int last_intensity;
+
+static int ezx_send_intensity(struct backlight_device *bd)
+{
+ unsigned long flags;
+ int intensity = bd->props->brightness;
+
+ printk( KERN_DEBUG "ezx_set_intensity to %d", intensity );
+
+ if (bd->props->power != FB_BLANK_UNBLANK)
+ intensity = 0;
+ if (bd->props->fb_blank != FB_BLANK_UNBLANK)
+ intensity = 0;
+
+ spin_lock_irqsave(&bl_lock, flags);
+
+ printk( KERN_DEBUG "backlight last intensity was %d, new intensity is %d", last_intensity, intensity );
+
+ if ( !last_intensity && intensity ) {
+ printk( KERN_DEBUG "backlight power ON" );
+ /* need to power on backlight */
+ PWM_CTRL0 = 2; /* pre-scaler */
+ PWM_PWDUTY0 = intensity; /* duty cycle */
+ PWM_PERVAL0 = 49; /* period */
+ pxa_set_cken(CKEN0_PWM0, 1); /* clock enable */
+ GPDR0 |= 0x00010000; /* set GPIO16 as output */
+ pxa_gpio_mode(GPIO16_PWM0_MD); /* set GPIO16 as output */
+ }
+ else if ( last_intensity && !intensity ) {
+ printk( KERN_DEBUG "backlight power OFF" );
+ /* need to power off backlight */
+ PWM_PWDUTY0 = 0;
+ GAFR0_U &= 0xFFFFFFFC;
+ GPDR0 &= 0xFFFEFFFF; //PWM0 is GPIO16, set PWM0 as input when turn off bklight
+ pxa_set_cken(CKEN0_PWM0, 0); /* clock disable */
+ } else if ( last_intensity && intensity ) {
+ printk( KERN_DEBUG "backlight adjusting duty cycle" );
+ /* need to adjust duty cycle */
+ PWM_PWDUTY0 = intensity; /* duty cycle */
+ }
+ spin_unlock_irqrestore(&bl_lock, flags);
+ last_intensity = intensity;
+ return 0;
+}
+
+static int ezx_get_intensity(struct backlight_device *bd)
+{
+ return last_intensity;
+}
+
+static int ezx_set_intensity(struct backlight_device *bd)
+{
+ return ezx_send_intensity(ezx_backlight_device);
+}
+
+#ifdef CONFIG_PM
+static int ezx_bl_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ //set suspend flag
+ ezx_set_intensity(ezx_backlight_device);
+ return 0;
+}
+
+static int ezx_bl_resume(struct platform_device *pdev)
+{
+ // set resume flag
+ ezx_set_intensity(ezx_backlight_device);
+ return 0;
+}
+#else
+#define ezx_bl_suspend NULL
+#define ezx_bl_resume NULL
+#endif
+
+static struct backlight_properties ezx_bl_data = {
+ .owner = THIS_MODULE,
+ .get_brightness = ezx_get_intensity,
+ .max_brightness = EZX_MAX_INTENSITY,
+ .update_status = ezx_set_intensity,
+};
+
+static int __init ezx_bl_probe(struct platform_device *pdev)
+{
+ ezx_backlight_device = backlight_device_register ("ezx-bl",
+ NULL, &ezx_bl_data);
+ if (IS_ERR (ezx_backlight_device))
+ return PTR_ERR (ezx_backlight_device);
+
+ //ezx_bl_data.requested_brightness = EZX_DEFAULT_INTENSITY;
+ //ezx_bl_data.requested_power = FB_BLANK_UNBLANK;
+ //ezx_set_intensity(ezx_backlight_device, ezx_bl_data.requested_brightness);
+
+ printk("EZX Backlight Driver Initialized.\n");
+ return 0;
+}
+
+static int ezx_bl_remove(struct platform_device *pdev)
+{
+ backlight_device_unregister(ezx_backlight_device);
+
+ printk("EZX Backlight Driver Unloaded.\n");
+ return 0;
+}
+
+static struct platform_driver ezx_bl_driver = {
+ .probe = ezx_bl_probe,
+ .remove = ezx_bl_remove,
+ .suspend = ezx_bl_suspend,
+ .resume = ezx_bl_resume,
+ .driver = {
+ .name = "ezx-bl",
+ },
+};
+
+static int __init ezx_bl_init(void)
+{
+ return platform_driver_register(&ezx_bl_driver);
+}
+
+static void __exit ezx_bl_exit(void)
+{
+ platform_driver_unregister(&ezx_bl_driver);
+}
+
+module_init(ezx_bl_init);
+module_exit(ezx_bl_exit);
+
+MODULE_AUTHOR("Michael Lauer <mickey@Vanille.de>");
+MODULE_DESCRIPTION("Backlight Driver for Motorola A780|E680(i)");
+MODULE_LICENSE("GPL");
|
