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MOXA linux-2.6.x / linux-2.6.19-uc1 from UC-7110-LX-BOOTLOADER-1.9_VERSION-4.2.tgz
[linux-2.6.19-moxart.git] / drivers / char / lcm0.c
blobec79a21b762888cb90c6efe81d8ea59abf67c942
1 /*
2 * Copyright (C) MOXA Inc. All rights reserved.
3 *
4 * This software is distributed under the terms of the
5 * MOXA License. See the file COPYING-MOXA for details.
6 *
7 * This is Moxa CPU for IVTC ODM LCM moudle WG12864C device driver.
8 * It is from misc interface. So the device node major number is 10.
9 * The device node minor number is following:
10 * lcm : 102
11 *
12 * There devices are mapping system memory is following:
13 * lcm : 0x04000000 read only, data -> LCM & control signal
14 * : 0x04002000 write only, LCM -> data & control signal
15 *
16 * History:
17 * Date Aurhor Comment
18 * 12-05-2005 Victor Yu. Create it.
19 * 09-03-2008 Victor Yu. Modify to support IVTC write byte feature.
20 */
21 #include <linux/config.h>
22 #include <asm/arch/moxa.h>
23 #include <linux/module.h>
24 #include <linux/kernel.h>
25 #include <linux/types.h>
26 #include <linux/miscdevice.h>
27 #include <linux/fcntl.h>
28 #include <linux/init.h>
29 #include <linux/poll.h>
30 #include <linux/proc_fs.h>
31 #include <linux/spinlock.h>
32 #include <linux/delay.h>
33 #include <linux/rtc.h>
34 #include <linux/timer.h>
35 #include <linux/ioport.h>
36
37 #include <asm/io.h>
38 #include <asm/uaccess.h>
39 #include <asm/system.h>
40 #include "moxalcm.h"
41
42 #define LCM_READ_ADDR 0x84002000
43 #define LCM_WRITE_ADDR 0x84000000
44
45 #define MOXA_LCM_MINOR 102
46
47 static spinlock_t lcm_lock= SPIN_LOCK_UNLOCKED;
48
49 //
50 // LCM file operation function call
51 //
52 static unsigned char fnt8x8[]={
53 0x3E,0x51,0x49,0x45,0x3E,0x00,0x00,0x00,0x40,0x42,0x7F,0x40,0x40,0x00,0x00,0x00,
54 0x42,0x61,0x51,0x49,0x66,0x00,0x00,0x00,0x22,0x49,0x49,0x49,0x36,0x00,0x00,0x00,
55 0x18,0x14,0x52,0x7F,0x50,0x00,0x00,0x00,0x27,0x45,0x45,0x45,0x39,0x00,0x00,0x00,
56 0x3C,0x4A,0x49,0x49,0x32,0x00,0x00,0x00,0x03,0x01,0x79,0x05,0x03,0x00,0x00,0x00,
57 0x36,0x49,0x49,0x49,0x36,0x00,0x00,0x00,0x26,0x49,0x49,0x49,0x3E,0x00,0x00,0x00,
58 0x7C,0x12,0x11,0x12,0x7C,0x00,0x00,0x00,0x41,0x7F,0x49,0x49,0x36,0x00,0x00,0x00,
59 0x1C,0x22,0x41,0x41,0x22,0x00,0x00,0x00,0x7F,0x41,0x41,0x22,0x1C,0x00,0x00,0x00,
60 0x41,0x7F,0x49,0x49,0x63,0x00,0x00,0x00,0x41,0x7F,0x49,0x09,0x03,0x00,0x00,0x00,
61 0x7F,0x3E,0x3E,0x1C,0x1C,0x08,0x08,0x00,0x08,0x08,0x1C,0x1C,0x3E,0x3E,0x7F,0x00,
62 0x00,0x24,0x66,0xFF,0xFF,0x66,0x24,0x00,0x00,0x5F,0x5F,0x00,0x00,0x5F,0x5F,0x00,
63 0x06,0x0F,0x09,0x7F,0x7F,0x01,0x7F,0x7F,0x40,0xDA,0xBF,0xA5,0xFD,0x59,0x03,0x02,
64 0x00,0x70,0x70,0x70,0x70,0x70,0x70,0x00,0x80,0x94,0xB6,0xFF,0xFF,0xB6,0x94,0x80,
65 0x00,0x04,0x06,0x7F,0x7F,0x06,0x04,0x00,0x00,0x10,0x30,0x7F,0x7F,0x30,0x10,0x00,
66 0x08,0x08,0x08,0x2A,0x3E,0x1C,0x08,0x00,0x08,0x1C,0x3E,0x2A,0x08,0x08,0x08,0x00,
67 0x3C,0x3C,0x20,0x20,0x20,0x20,0x20,0x00,0x08,0x1C,0x3E,0x08,0x08,0x3E,0x1C,0x08,
68 0x30,0x38,0x3C,0x3E,0x3E,0x3C,0x38,0x30,0x06,0x0E,0x1E,0x3E,0x3E,0x1E,0x0E,0x06,
69 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x5F,0x00,0x00,0x00,0x00,
70 0x00,0x07,0x00,0x00,0x00,0x07,0x00,0x00,0x14,0x7F,0x14,0x14,0x14,0x7F,0x14,0x00,
71 0x24,0x2A,0x6B,0x2A,0x10,0x00,0x00,0x00,0x43,0x23,0x10,0x08,0x04,0x62,0x61,0x00,
72 0x32,0x4D,0x49,0x4D,0x52,0x28,0x40,0x00,0x04,0x03,0x00,0x00,0x00,0x00,0x00,0x00,
73 0x00,0x00,0x1C,0x22,0x41,0x00,0x00,0x00,0x00,0x00,0x41,0x22,0x1C,0x00,0x00,0x00,
74 0x08,0x2A,0x1C,0x08,0x08,0x1C,0x2A,0x08,0x00,0x08,0x08,0x3E,0x08,0x08,0x00,0x00,
75 0x00,0x00,0x80,0x60,0x00,0x00,0x00,0x00,0x08,0x08,0x08,0x08,0x08,0x00,0x00,0x00,
76 0x00,0x00,0x60,0x60,0x00,0x00,0x00,0x00,0x40,0x20,0x10,0x08,0x04,0x02,0x01,0x00,
77 0x3E,0x61,0x51,0x49,0x45,0x43,0x3E,0x00,0x40,0x42,0x7F,0x40,0x40,0x00,0x00,0x00,
78 0x62,0x51,0x51,0x49,0x49,0x46,0x00,0x00,0x22,0x41,0x41,0x49,0x49,0x36,0x00,0x00,
79 0x18,0x14,0x12,0x11,0x51,0x7F,0x50,0x00,0x27,0x45,0x45,0x45,0x45,0x39,0x00,0x00,
80 0x3C,0x4A,0x49,0x49,0x48,0x30,0x00,0x00,0x03,0x01,0x01,0x71,0x09,0x07,0x00,0x00,
81 0x36,0x49,0x49,0x49,0x49,0x36,0x00,0x00,0x06,0x49,0x49,0x49,0x29,0x1E,0x00,0x00,
82 0x00,0x00,0x66,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x66,0x00,0x00,0x00,0x00,0x00,
83 0x08,0x14,0x22,0x41,0x00,0x00,0x00,0x00,0x24,0x24,0x24,0x24,0x24,0x00,0x00,0x00,
84 0x00,0x00,0x41,0x22,0x14,0x08,0x00,0x00,0x02,0x01,0x01,0x51,0x09,0x06,0x00,0x00,
85 0x3E,0x41,0x41,0x51,0x51,0x11,0x0E,0x00,0x7C,0x12,0x11,0x12,0x7C,0x00,0x00,0x00,
86 0x41,0x7F,0x49,0x49,0x49,0x36,0x00,0x00,0x1C,0x22,0x41,0x41,0x41,0x22,0x00,0x00,
87 0x41,0x7F,0x41,0x41,0x41,0x22,0x1C,0x00,0x7F,0x49,0x49,0x49,0x41,0x41,0x41,0x00,
88 0x7F,0x09,0x09,0x09,0x01,0x01,0x01,0x00,0x1C,0x22,0x41,0x41,0x41,0x51,0x32,0x00,
89 0x7F,0x08,0x08,0x08,0x08,0x7F,0x00,0x00,0x00,0x41,0x7F,0x41,0x00,0x00,0x00,0x00,
90 0x30,0x40,0x40,0x40,0x41,0x3F,0x01,0x00,0x00,0x7F,0x08,0x08,0x08,0x14,0x63,0x00,
91 0x00,0x7F,0x40,0x40,0x40,0x40,0x40,0x00,0x7F,0x02,0x04,0x08,0x04,0x02,0x7F,0x00,
92 0x7F,0x02,0x04,0x08,0x10,0x20,0x7F,0x00,0x1C,0x22,0x41,0x41,0x41,0x22,0x1C,0x00,
93 0x00,0x7F,0x09,0x09,0x09,0x09,0x06,0x00,0x1E,0x21,0x21,0x21,0x61,0x5E,0x00,0x00,
94 0x7F,0x09,0x09,0x09,0x19,0x66,0x00,0x00,0x26,0x49,0x49,0x49,0x49,0x32,0x00,0x00,
95 0x01,0x01,0x01,0x7F,0x01,0x01,0x01,0x00,0x3F,0x40,0x40,0x40,0x40,0x3F,0x00,0x00,
96 0x1F,0x20,0x40,0x40,0x20,0x1F,0x00,0x00,0x7F,0x20,0x10,0x08,0x10,0x20,0x7F,0x00,
97 0x41,0x22,0x14,0x08,0x14,0x22,0x41,0x00,0x07,0x08,0x78,0x08,0x07,0x00,0x00,0x00,
98 0x41,0x61,0x51,0x49,0x45,0x43,0x41,0x00,0x00,0x7F,0x41,0x41,0x41,0x00,0x00,0x00,
99 0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x00,0x00,0x41,0x41,0x41,0x7F,0x00,0x00,0x00,
100 0x08,0x04,0x02,0x01,0x02,0x04,0x08,0x00,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,
101 0x00,0x00,0x00,0x03,0x04,0x00,0x00,0x00,0x20,0x54,0x54,0x54,0x14,0x78,0x40,0x00,
102 0x00,0x7F,0x48,0x48,0x48,0x48,0x30,0x00,0x38,0x44,0x44,0x44,0x44,0x28,0x00,0x00,
103 0x30,0x48,0x48,0x48,0x48,0x3F,0x00,0x00,0x38,0x54,0x54,0x54,0x54,0x08,0x00,0x00,
104 0x08,0x7E,0x09,0x09,0x01,0x02,0x00,0x00,0x98,0xA4,0xA4,0xA4,0xA4,0x78,0x00,0x00,
105 0x00,0x7F,0x08,0x08,0x08,0x08,0x70,0x00,0x00,0x00,0x00,0x7D,0x00,0x00,0x00,0x00,
106 0x60,0x80,0x80,0x80,0x80,0x7D,0x00,0x00,0x7F,0x10,0x10,0x10,0x28,0x44,0x00,0x00,
107 0x00,0x00,0x00,0x7F,0x00,0x00,0x00,0x00,0x78,0x04,0x08,0x10,0x08,0x04,0x78,0x00,
108 0x7C,0x04,0x04,0x04,0x04,0x78,0x00,0x00,0x38,0x44,0x44,0x44,0x44,0x38,0x00,0x00,
109 0xFC,0x24,0x24,0x24,0x24,0x18,0x00,0x00,0x18,0x24,0x24,0x24,0x24,0xFC,0x00,0x00,
110 0x7C,0x08,0x04,0x04,0x04,0x08,0x00,0x00,0x48,0x54,0x54,0x54,0x54,0x24,0x00,0x00,
111 0x00,0x00,0x04,0x7F,0x04,0x00,0x00,0x00,0x3C,0x40,0x40,0x40,0x40,0x3C,0x00,0x00,
112 0x1C,0x20,0x40,0x40,0x20,0x1C,0x00,0x00,0x3C,0x40,0x20,0x10,0x20,0x40,0x3C,0x00,
113 0x00,0x44,0x28,0x10,0x28,0x44,0x00,0x00,0x9C,0xA0,0xA0,0xA0,0xA0,0x7C,0x00,0x00,
114 0x44,0x44,0x64,0x54,0x4C,0x44,0x00,0x00,0x00,0x08,0x08,0x36,0x41,0x41,0x00,0x00,
115 0x00,0x00,0x00,0x77,0x00,0x00,0x00,0x00,0x41,0x41,0x36,0x08,0x08,0x00,0x00,0x00,
116 0x02,0x03,0x01,0x03,0x02,0x03,0x01,0x00,0x70,0x48,0x44,0x42,0x44,0x48,0x70,0x00,
117 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
118 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
119 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
120 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
121 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
122 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
123 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
124 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
125 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
126 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
127 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
128 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
129 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
130 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
131 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
132 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
133 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
134 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
135 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
136 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
137 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
138 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
139 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
140 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
141 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
142 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
143 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
144 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
145 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
146 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
147 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
148 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
149 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
150 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
151 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
152 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
153 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
154 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
155 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
156 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
157 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
158 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
159 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
160 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
161 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
162 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
163 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
164 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
165 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
166 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
167 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
168 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
169 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
170 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
171 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
172 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
173 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
174 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
175 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
176 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
177 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
178 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
179 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
180 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
181 };
182 static int lcmx, lcmy; // dots position
183
184 // following on LCM command
185 #define LCM_CMD_DISPLAY_ON 0x3f
186 #define LCM_CMD_DISPLAY_OFF 0x3e
187 #define LCM_CMD_DISPLAY_START_LINE 0xc0
188 #define LCM_DISPLAY_START_LINE_MASK 0x3F // 0-63
189 #define LCM_CMD_SET_PAGE 0xb8 // x address
190 #define LCM_SET_PAGE_MASK 0x07 // x address 0-7
191 #define LCM_CMD_SET_ADDRESS 0x40 // y address, from 0x40 to 0xc0
192 #define LCM_SET_ADDRESS_MASK 0x3F // y address 0-63
193 #define LCM_STATUS_BUSY 0x80
194 #define LCM_STATUS_ON 0x20
195 #define LCM_STATUS_RESET 0x10
196 #define LCM_MODE_SELECT 0x05
197
198 // following LCM control
199 #define LCM_DATA (1<<8)
200 #define LCM_CMD 0
201 #define LCM_READ (1<<9)
202 #define LCM_WRITE 0
203 #define LCM_EBIT_ON (1<<10)
204 #define LCM_EBIT_OFF 0
205 #define LCM_BACK_LIGHT_ON (1<<11)
206 #define LCM_BACK_LIGHT_OFF 0
207 #define LCM_CS1 (1<<13)
208 #define LCM_CS2 (1<<12)
209 #define LCM_WRITE_ENABLE (1<<14)
210 #define LCM_READ_ENABLE 0
211 #define LCM_DATA_MASK 0xff
212
213 #define LCM_MAX_X_DOTS 128
214 #define LCM_MAX_Y_DOTS 64
215 #define LCM_HALF_X_DOTS (LCM_MAX_X_DOTS/2)
216 #define LCM_X_DOTS 8
217 #define LCM_Y_DOTS 8
218 #define LCM_MAX_X (LCM_MAX_X_DOTS/LCM_X_DOTS)
219 #define LCM_MAX_Y (LCM_MAX_Y_DOTS/LCM_Y_DOTS)
220
221 static unsigned char lcm_pix_buffer[LCM_MAX_Y][LCM_MAX_X_DOTS];
222 static u16 lcm_ctrl_data=LCM_BACK_LIGHT_ON;
223 static int lcm_auto_scroll_flag=1;
224 static int lcm_reverse_flag=0;
225 typedef struct lcm_xy {
226 int x; // 0 - 15
227 int y; // 0 - 7
228 } lcm_xy_t;
229
230 #define LCM_NOT_LOCK_INT
231
232 static void LCM_write_cmd(u16 cmd, u16 cs)
233 {
234 #ifndef LCM_NOT_LOCK_INT
235 unsigned long flags;
236
237 save_flags(flags);
238 cli();
239 #endif
240 spin_lock(&lcm_lock);
241 outw(lcm_ctrl_data|LCM_EBIT_OFF|LCM_READ|LCM_CMD|LCM_READ_ENABLE|cs, LCM_WRITE_ADDR);
242 outw(lcm_ctrl_data|LCM_EBIT_OFF|LCM_WRITE|LCM_CMD|LCM_READ_ENABLE|cs, LCM_WRITE_ADDR);
243 udelay(20) ;
244 outw(lcm_ctrl_data|LCM_EBIT_ON|LCM_WRITE|LCM_CMD|LCM_READ_ENABLE|cs|cmd, LCM_WRITE_ADDR);
245 udelay(20) ;
246 outw(lcm_ctrl_data|LCM_EBIT_OFF|LCM_WRITE|LCM_CMD|LCM_WRITE_ENABLE|cs|cmd, LCM_WRITE_ADDR);
247 outw(lcm_ctrl_data|LCM_EBIT_OFF|LCM_READ|LCM_CMD|LCM_READ_ENABLE|cs, LCM_WRITE_ADDR);
248 spin_unlock(&lcm_lock);
249 #ifndef LCM_NOT_LOCK_INT
250 restore_flags(flags);
251 #endif
252 }
253
254 static void LCM_write_data(unsigned char data, u16 cs)
255 {
256 #ifndef LCM_NOT_LOCK_INT
257 unsigned long flags;
258
259 save_flags(flags);
260 cli();
261 #endif
262 spin_lock(&lcm_lock);
263 outw(lcm_ctrl_data|LCM_EBIT_OFF|LCM_READ|LCM_DATA|LCM_READ_ENABLE|cs, LCM_WRITE_ADDR);
264 outw(lcm_ctrl_data|LCM_EBIT_OFF|LCM_WRITE|LCM_DATA|LCM_READ_ENABLE|cs, LCM_WRITE_ADDR);
265 udelay(20) ;
266 outw(lcm_ctrl_data|LCM_EBIT_ON|LCM_WRITE|LCM_DATA|LCM_READ_ENABLE|cs|(u16)data, LCM_WRITE_ADDR);
267 udelay(20) ;
268 outw(lcm_ctrl_data|LCM_EBIT_OFF|LCM_WRITE|LCM_DATA|LCM_WRITE_ENABLE|cs|(u16)data, LCM_WRITE_ADDR);
269 outw(lcm_ctrl_data|LCM_EBIT_OFF|LCM_READ|LCM_DATA|LCM_READ_ENABLE|cs, LCM_WRITE_ADDR);
270 spin_unlock(&lcm_lock);
271 #ifndef LCM_NOT_LOCK_INT
272 restore_flags(flags);
273 #endif
274 }
275
276 static void lcm_up_one_line(void)
277 {
278 int x, y, index, i;
279
280 // first up one line for lcm buffer
281 spin_lock(&lcm_lock);
282 for ( y=1; y<LCM_MAX_Y; y++ ) {
283 for ( x=0; x<LCM_MAX_X; x++ ) {
284 memcpy(&lcm_pix_buffer[y-1][x*LCM_X_DOTS], &lcm_pix_buffer[y][x*LCM_X_DOTS], LCM_X_DOTS);
285 }
286 }
287 for ( x=0; x<LCM_MAX_X; x++ ) {
288 memset(&lcm_pix_buffer[LCM_MAX_Y-1][x*LCM_X_DOTS], 0, LCM_X_DOTS);
289 }
290 spin_unlock(&lcm_lock);
291
292 // second redisplay up one line on LCM
293 LCM_write_cmd(LCM_CMD_DISPLAY_OFF, LCM_CS1);
294 LCM_write_cmd(LCM_CMD_DISPLAY_OFF, LCM_CS2);
295 for ( y=0; y<LCM_MAX_Y; y++ ) {
296 for ( x=0; x<LCM_MAX_X; x++ ) {
297 if ( x == 0 ) {
298 LCM_write_cmd(LCM_CMD_SET_ADDRESS, LCM_CS1);
299 LCM_write_cmd(LCM_CMD_SET_PAGE | (y & LCM_SET_PAGE_MASK), LCM_CS1);
300 } else if ( x == (LCM_HALF_X_DOTS/LCM_X_DOTS) ) {
301 LCM_write_cmd(LCM_CMD_SET_ADDRESS, LCM_CS2);
302 LCM_write_cmd(LCM_CMD_SET_PAGE | (y & LCM_SET_PAGE_MASK), LCM_CS2);
303 }
304 index = x * LCM_X_DOTS;
305 for ( i=0; i<LCM_X_DOTS; i++, index++ ) {
306 if ( x < (LCM_HALF_X_DOTS/LCM_X_DOTS) ) {
307 LCM_write_data(lcm_pix_buffer[y][index], LCM_CS1);
308 } else {
309 LCM_write_data(lcm_pix_buffer[y][index], LCM_CS2);
310 }
311 }
312 }
313 }
314 LCM_write_cmd(LCM_CMD_DISPLAY_ON, LCM_CS1);
315 LCM_write_cmd(LCM_CMD_DISPLAY_ON, LCM_CS2);
316 spin_lock(&lcm_lock);
317 lcmx = 0;
318 lcmy = LCM_MAX_Y - 1;
319 spin_unlock(&lcm_lock);
320 }
321
322 static void LCM_printf_char(unsigned char ch)
323 {
324 int index, i;
325
326 if ( ch == '\n' ) {
327 spin_lock(&lcm_lock);
328 for ( i=(lcmx/LCM_X_DOTS); i<LCM_MAX_X; i++ ) {
329 if ( lcm_reverse_flag )
330 memset(&lcm_pix_buffer[lcmy][i*LCM_X_DOTS], 1, LCM_X_DOTS);
331 else
332 memset(&lcm_pix_buffer[lcmy][i*LCM_X_DOTS], 0, LCM_X_DOTS);
333 }
334 lcmx = 0;
335 lcmy++;
336 if ( lcmy >= LCM_MAX_Y ) {
337 if ( lcm_auto_scroll_flag ) {
338 lcmy = LCM_MAX_Y - 1;
339 spin_unlock(&lcm_lock);
340 lcm_up_one_line();
341 return;
342 } else {
343 lcmy = 0;
344 }
345 }
346 spin_unlock(&lcm_lock);
347 return;
348 }
349 if ( lcmx < LCM_HALF_X_DOTS ) {
350 LCM_write_cmd(LCM_CMD_SET_ADDRESS|(unsigned char)lcmx, LCM_CS1);
351 LCM_write_cmd(LCM_CMD_SET_PAGE | (lcmy & LCM_SET_PAGE_MASK), LCM_CS1);
352 } else {
353 LCM_write_cmd(LCM_CMD_SET_ADDRESS|(unsigned char)(lcmx-LCM_HALF_X_DOTS), LCM_CS2);
354 LCM_write_cmd(LCM_CMD_SET_PAGE | (lcmy & LCM_SET_PAGE_MASK), LCM_CS2);
355 }
356 index = ch * LCM_Y_DOTS;
357 for ( i=0; i<LCM_X_DOTS; i++, index++, lcmx++ ) {
358 spin_lock(&lcm_lock);
359 if ( lcm_reverse_flag )
360 lcm_pix_buffer[lcmy][lcmx] = ~fnt8x8[index];
361 else
362 lcm_pix_buffer[lcmy][lcmx] = fnt8x8[index];
363 spin_unlock(&lcm_lock);
364 if ( lcmx < LCM_HALF_X_DOTS )
365 LCM_write_data(fnt8x8[index], LCM_CS1);
366 else
367 LCM_write_data(fnt8x8[index], LCM_CS2);
368 }
369 spin_lock(&lcm_lock);
370 if ( lcmx >= LCM_MAX_X_DOTS ) {
371 lcmx = 0;
372 lcmy++;
373 if ( lcmy >= LCM_MAX_Y ) {
374 if ( lcm_auto_scroll_flag ) {
375 lcmy = LCM_MAX_Y - 1;
376 spin_unlock(&lcm_lock);
377 lcm_up_one_line();
378 return;
379 } else {
380 lcmy = 0;
381 }
382 }
383 }
384 spin_unlock(&lcm_lock);
385 }
386
387 static void LCM_clear_line(void)
388 {
389 int x, index, i;
390
391 for ( x=0; x<LCM_MAX_X; x++ ) {
392 spin_lock(&lcm_lock);
393 if ( lcm_reverse_flag )
394 memset(&lcm_pix_buffer[lcmy][x*LCM_X_DOTS], 1, LCM_X_DOTS);
395 else
396 memset(&lcm_pix_buffer[lcmy][x*LCM_X_DOTS], 0, LCM_X_DOTS);
397 spin_unlock(&lcm_lock);
398 if ( x == 0 ) {
399 LCM_write_cmd(LCM_CMD_SET_ADDRESS, LCM_CS1);
400 LCM_write_cmd(LCM_CMD_SET_PAGE | (lcmy & LCM_SET_PAGE_MASK), LCM_CS1);
401 } else if ( x == (LCM_HALF_X_DOTS/LCM_X_DOTS) ) {
402 LCM_write_cmd(LCM_CMD_SET_ADDRESS, LCM_CS2);
403 LCM_write_cmd(LCM_CMD_SET_PAGE | (lcmy & LCM_SET_PAGE_MASK), LCM_CS2);
404 }
405 index = x * LCM_X_DOTS;
406 for ( i=0; i<LCM_X_DOTS; i++, index++ ) {
407 if ( x < (LCM_HALF_X_DOTS/LCM_X_DOTS) ) {
408 LCM_write_data(lcm_pix_buffer[lcmy][index], LCM_CS1);
409 } else {
410 LCM_write_data(lcm_pix_buffer[lcmy][index], LCM_CS2);
411 }
412 }
413 }
414 spin_lock(&lcm_lock);
415 lcmx = 0;
416 spin_unlock(&lcm_lock);
417 }
418
419 static void LCM_cls(void)
420 {
421 int x, y;
422
423 LCM_write_cmd(LCM_CMD_DISPLAY_OFF, LCM_CS1);
424 LCM_write_cmd(LCM_CMD_DISPLAY_OFF, LCM_CS2);
425 for ( y=0; y<LCM_MAX_Y; y++ ) {
426 // clear LCM hardware
427 for ( x=0; x<LCM_MAX_X_DOTS; x++ ) {
428 if ( x == 0 ) {
429 LCM_write_cmd(LCM_CMD_SET_ADDRESS, LCM_CS1);
430 LCM_write_cmd(LCM_CMD_SET_PAGE | (y & LCM_SET_PAGE_MASK), LCM_CS1);
431 } else if ( x == LCM_HALF_X_DOTS ) {
432 LCM_write_cmd(LCM_CMD_SET_ADDRESS, LCM_CS2);
433 LCM_write_cmd(LCM_CMD_SET_PAGE | (y & LCM_SET_PAGE_MASK), LCM_CS2);
434 }
435 spin_lock(&lcm_lock);
436 if ( lcm_reverse_flag )
437 lcm_pix_buffer[y][x] = 0xff;
438 else
439 lcm_pix_buffer[y][x] = 0;
440 spin_unlock(&lcm_lock);
441 if ( lcm_reverse_flag ) {
442 if ( x < LCM_HALF_X_DOTS )
443 LCM_write_data(0xff, LCM_CS1);
444 else
445 LCM_write_data(0xff, LCM_CS2);
446 } else {
447 if ( x < LCM_HALF_X_DOTS )
448 LCM_write_data(0, LCM_CS1);
449 else
450 LCM_write_data(0, LCM_CS2);
451 }
452 }
453 }
454 LCM_write_cmd(LCM_CMD_DISPLAY_ON, LCM_CS1);
455 LCM_write_cmd(LCM_CMD_DISPLAY_ON, LCM_CS2);
456 spin_lock(&lcm_lock);
457 lcmx = lcmy = 0;
458 spin_unlock(&lcm_lock);
459 }
460
461 /*
462 * I don't know why cannot malloc memory from kernel.
463 * 03-10-2004 Victor Yu.
464 */
465 #define USE_WRITE_BUFFER
466 static ssize_t lcm_write(struct file * filp, const char * buf, size_t count, loff_t *ppos)
467 {
468 #ifdef USE_WRITE_BUFFER
469 char write_buffer[LCM_MAX_X * LCM_MAX_Y];
470 #else
471 char *ptr;
472 #endif
473 int i;
474
475 if ( count == 0 )
476 return 0;
477 #ifdef USE_WRITE_BUFFER
478 if ( count > (LCM_MAX_X * LCM_MAX_Y) )
479 count = LCM_MAX_X * LCM_MAX_Y;
480 if ( copy_from_user(write_buffer, buf, count) ) {
481 return -EFAULT;
482 }
483 for ( i=0; i<count; i++ )
484 LCM_printf_char(write_buffer[i]);
485 #else
486 ptr = kmalloc(count, GFP_KERNEL);
487 if ( ptr == NULL )
488 return -ENOMEM;
489 if ( copy_from_user(ptr, buf, count) ) {
490 kfree(ptr);
491 return -EFAULT;
492 }
493 for ( i=0; i<count; i++ )
494 LCM_printf_char(*ptr++);
495 kfree(ptr);
496 #endif
497 return count;
498 }
499
500 static int lcm_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
501 {
502 lcm_xy_t pos;
503 static unsigned char user_data;
504
505 switch ( cmd ) {
506 case IOCTL_LCM_PIX_ON :
507 case IOCTL_LCM_PIX_OFF :
508 {
509 unsigned char v, mask;
510
511 if ( copy_from_user(&pos, (void *)arg, sizeof(pos)) )
512 return -EFAULT;
513 if ( pos.x < 0 || pos.x >= LCM_MAX_X_DOTS || pos.y < 0 || pos.y >= LCM_MAX_Y_DOTS )
514 return -EINVAL;
515 spin_lock(&lcm_lock);
516 v = lcm_pix_buffer[pos.y/LCM_Y_DOTS][pos.x];
517 mask = 1 << (pos.y % LCM_Y_DOTS);
518 if ( cmd == IOCTL_LCM_PIX_ON )
519 v |= mask;
520 else
521 v &= ~mask;
522 lcm_pix_buffer[pos.y/LCM_Y_DOTS][pos.x] = v;
523 spin_unlock(&lcm_lock);
524 if ( pos.x < LCM_HALF_X_DOTS ) {
525 LCM_write_cmd(LCM_CMD_SET_ADDRESS|(unsigned char)pos.x, LCM_CS1);
526 LCM_write_cmd(LCM_CMD_SET_PAGE | ((pos.y/LCM_Y_DOTS) & LCM_SET_PAGE_MASK), LCM_CS1);
527 LCM_write_data(v, LCM_CS1);
528 } else {
529 LCM_write_cmd(LCM_CMD_SET_ADDRESS|(unsigned char)(pos.x-LCM_HALF_X_DOTS), LCM_CS2);
530 LCM_write_cmd(LCM_CMD_SET_PAGE | ((pos.y/LCM_Y_DOTS) & LCM_SET_PAGE_MASK), LCM_CS2);
531 LCM_write_data(v, LCM_CS2);
532 }
533 break;
534 }
535 case IOCTL_LCM_GOTO_XY :
536 if ( copy_from_user(&pos, (void *)arg, sizeof(pos)) )
537 return -EFAULT;
538 if ( pos.x < 0 || pos.x >= LCM_MAX_X || pos.y < 0 || pos.y >= LCM_MAX_Y )
539 return -EINVAL;
540 spin_lock(&lcm_lock);
541 lcmx = pos.x * LCM_X_DOTS;
542 lcmy = pos.y;
543 spin_unlock(&lcm_lock);
544 break;
545 case IOCTL_LCM_CLS :
546 LCM_cls();
547 break;
548 case IOCTL_LCM_CLEAN_LINE :
549 LCM_clear_line();
550 break;
551 case IOCTL_LCM_GET_XY :
552 spin_lock(&lcm_lock);
553 pos.x = lcmx / LCM_X_DOTS;
554 pos.y = lcmy;
555 spin_unlock(&lcm_lock);
556 if ( copy_to_user((void *)arg, &pos,sizeof(pos)) )
557 return -EFAULT;
558 break;
559 case IOCTL_LCM_BACK_LIGHT_ON :
560 spin_lock(&lcm_lock);
561 lcm_ctrl_data |= LCM_BACK_LIGHT_ON;
562 outw(lcm_ctrl_data, LCM_WRITE_ADDR);
563 spin_unlock(&lcm_lock);
564 break;
565 case IOCTL_LCM_BACK_LIGHT_OFF :
566 spin_lock(&lcm_lock);
567 lcm_ctrl_data &= ~LCM_BACK_LIGHT_ON;
568 outw(lcm_ctrl_data, LCM_WRITE_ADDR);
569 spin_unlock(&lcm_lock);
570 break;
571 case IOCTL_LCM_AUTO_SCROLL_ON :
572 spin_lock(&lcm_lock);
573 lcm_auto_scroll_flag = 1;
574 spin_unlock(&lcm_lock);
575 break;
576 case IOCTL_LCM_AUTO_SCROLL_OFF :
577 spin_lock(&lcm_lock);
578 lcm_auto_scroll_flag = 0;
579 spin_unlock(&lcm_lock);
580 break;
581 case IOCTL_LCM_REVERSE_ON :
582 spin_lock(&lcm_lock);
583 lcm_reverse_flag = 1;
584 spin_unlock(&lcm_lock);
585 break;
586 case IOCTL_LCM_REVERSE_OFF :
587 spin_lock(&lcm_lock);
588 lcm_reverse_flag = 0;
589 spin_unlock(&lcm_lock);
590 break;
591 case IOCTL_LCM_SAVE_BYTE :
592 if ( copy_from_user(&user_data, (void *)arg, sizeof(user_data)) )
593 return -EFAULT;
594 break;
595 case IOCTL_LCM_WRITE_BYTE :
596 {
597 unsigned char v, mask, cbit;
598 int i, x, y, ybit;
599 if ( copy_from_user(&pos, (void *)arg, sizeof(pos)) )
600 return -EFAULT;
601 if ( pos.x < 0 || pos.x >= LCM_MAX_X_DOTS || pos.y < 0 || pos.y >= LCM_MAX_Y_DOTS )
602 return -EINVAL;
603 spin_lock(&lcm_lock);
604 y = pos.y / LCM_Y_DOTS;
605 ybit = pos.y % LCM_Y_DOTS;
606 for ( i=0, x=pos.x, cbit=1; i<sizeof(unsigned char); i++, x++, cbit<<=1 ) {
607 v = lcm_pix_buffer[y][x];
608 mask = 1 << ybit;
609 if ( user_data & cbit )
610 v |= mask;
611 else
612 v &= ~mask;
613 lcm_pix_buffer[y][x] = v;
614 }
615 spin_unlock(&lcm_lock);
616 for ( i=0, x=pos.x; i<sizeof(unsigned char); i++, x++ ) {
617 if ( x < LCM_HALF_X_DOTS ) {
618 LCM_write_cmd(LCM_CMD_SET_ADDRESS|(unsigned char)x, LCM_CS1);
619 LCM_write_cmd(LCM_CMD_SET_PAGE | (y & LCM_SET_PAGE_MASK), LCM_CS1);
620 LCM_write_data(lcm_pix_buffer[y][x], LCM_CS1);
621 } else {
622 LCM_write_cmd(LCM_CMD_SET_ADDRESS|(unsigned char)(x-LCM_HALF_X_DOTS), LCM_CS2);
623 LCM_write_cmd(LCM_CMD_SET_PAGE | (y & LCM_SET_PAGE_MASK), LCM_CS2);
624 LCM_write_data(lcm_pix_buffer[y][x], LCM_CS2);
625 }
626 }
627 break;
628 }
629 case IOCTL_LCM_DISPLAY_OFF :
630 LCM_write_cmd(LCM_CMD_DISPLAY_OFF, LCM_CS1);
631 LCM_write_cmd(LCM_CMD_DISPLAY_OFF, LCM_CS2);
632 break;
633 case IOCTL_LCM_DISPLAY_ON :
634 LCM_write_cmd(LCM_CMD_DISPLAY_ON, LCM_CS1);
635 LCM_write_cmd(LCM_CMD_DISPLAY_ON, LCM_CS2);
636 break;
637 default:
638 return -EINVAL;
639 }
640
641 return 0;
642 }
643
644 static int lcm_open(struct inode *inode, struct file *file)
645 {
646 if ( MINOR(inode->i_rdev) == MOXA_LCM_MINOR )
647 return 0;
648 return -ENODEV;
649 }
650
651 static int lcm_release(struct inode *inode, struct file *file)
652 {
653 return 0;
654 }
655
656 static struct file_operations lcm_fops = {
657 owner:THIS_MODULE,
658 llseek:NULL,
659 write:lcm_write,
660 ioctl:lcm_ioctl,
661 open:lcm_open,
662 release:lcm_release,
663 };
664 static struct miscdevice lcm_dev = {
665 MOXA_LCM_MINOR,
666 "lcm",
667 &lcm_fops
668 };
669
670 #if 1 // add by Victor Yu. 04-03-2007
671 extern int lcm_module_flag;
672 #endif
673 static void __exit ivtc_lcm0_exit(void)
674 {
675 misc_deregister(&lcm_dev);
676 lcm_module_flag = 0;
677 }
678
679 static int __init ivtc_lcm0_init(void)
680 {
681 printk("Moxa CPU misc: Register LCM module WG12864C misc ver1.0 ");
682 if ( lcm_module_flag ) {
683 printk("fail !\nThe other type LCM module device driver has loaded.\n");
684 return -ENOMEM;
685 }
686 if ( misc_register(&lcm_dev) ) {
687 printk("fail !\n");
688 return -ENOMEM;
689 }
690 lcm_module_flag = 1;
691 printk("OK.\n");
692 LCM_cls();
693 return 0;
694 }
695
696 module_init(ivtc_lcm0_init);
697 module_exit(ivtc_lcm0_exit);
698
699 MODULE_AUTHOR("Victor Yu");
700 MODULE_LICENSE("GPL");
MOXA 2.6.19 from UC-7110-LX-BOOTLOADER-1.9_VERSION-4.2.tgz