diff options
Diffstat (limited to 'drivers/char/briq_panel.c')
-rw-r--r-- | drivers/char/briq_panel.c | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/drivers/char/briq_panel.c b/drivers/char/briq_panel.c new file mode 100644 index 000000000000..a0e5eac5f33a --- /dev/null +++ b/drivers/char/briq_panel.c | |||
@@ -0,0 +1,268 @@ | |||
1 | /* | ||
2 | * Drivers for the Total Impact PPC based computer "BRIQ" | ||
3 | * by Dr. Karsten Jeppesen | ||
4 | * | ||
5 | */ | ||
6 | |||
7 | #include <linux/module.h> | ||
8 | |||
9 | #include <linux/types.h> | ||
10 | #include <linux/errno.h> | ||
11 | #include <linux/sched.h> | ||
12 | #include <linux/tty.h> | ||
13 | #include <linux/timer.h> | ||
14 | #include <linux/config.h> | ||
15 | #include <linux/kernel.h> | ||
16 | #include <linux/wait.h> | ||
17 | #include <linux/string.h> | ||
18 | #include <linux/slab.h> | ||
19 | #include <linux/ioport.h> | ||
20 | #include <linux/delay.h> | ||
21 | #include <linux/miscdevice.h> | ||
22 | #include <linux/fs.h> | ||
23 | #include <linux/mm.h> | ||
24 | #include <linux/init.h> | ||
25 | |||
26 | #include <asm/uaccess.h> | ||
27 | #include <asm/io.h> | ||
28 | #include <asm/prom.h> | ||
29 | |||
30 | #define BRIQ_PANEL_MINOR 156 | ||
31 | #define BRIQ_PANEL_VFD_IOPORT 0x0390 | ||
32 | #define BRIQ_PANEL_LED_IOPORT 0x0398 | ||
33 | #define BRIQ_PANEL_VER "1.1 (04/20/2002)" | ||
34 | #define BRIQ_PANEL_MSG0 "Loading Linux" | ||
35 | |||
36 | static int vfd_is_open; | ||
37 | static unsigned char vfd[40]; | ||
38 | static int vfd_cursor; | ||
39 | static unsigned char ledpb, led; | ||
40 | |||
41 | static void update_vfd(void) | ||
42 | { | ||
43 | int i; | ||
44 | |||
45 | /* cursor home */ | ||
46 | outb(0x02, BRIQ_PANEL_VFD_IOPORT); | ||
47 | for (i=0; i<20; i++) | ||
48 | outb(vfd[i], BRIQ_PANEL_VFD_IOPORT + 1); | ||
49 | |||
50 | /* cursor to next line */ | ||
51 | outb(0xc0, BRIQ_PANEL_VFD_IOPORT); | ||
52 | for (i=20; i<40; i++) | ||
53 | outb(vfd[i], BRIQ_PANEL_VFD_IOPORT + 1); | ||
54 | |||
55 | } | ||
56 | |||
57 | static void set_led(char state) | ||
58 | { | ||
59 | if (state == 'R') | ||
60 | led = 0x01; | ||
61 | else if (state == 'G') | ||
62 | led = 0x02; | ||
63 | else if (state == 'Y') | ||
64 | led = 0x03; | ||
65 | else if (state == 'X') | ||
66 | led = 0x00; | ||
67 | outb(led, BRIQ_PANEL_LED_IOPORT); | ||
68 | } | ||
69 | |||
70 | static int briq_panel_open(struct inode *ino, struct file *filep) | ||
71 | { | ||
72 | /* enforce single access */ | ||
73 | if (vfd_is_open) | ||
74 | return -EBUSY; | ||
75 | vfd_is_open = 1; | ||
76 | |||
77 | return 0; | ||
78 | } | ||
79 | |||
80 | static int briq_panel_release(struct inode *ino, struct file *filep) | ||
81 | { | ||
82 | if (!vfd_is_open) | ||
83 | return -ENODEV; | ||
84 | |||
85 | vfd_is_open = 0; | ||
86 | |||
87 | return 0; | ||
88 | } | ||
89 | |||
90 | static ssize_t briq_panel_read(struct file *file, char *buf, size_t count, | ||
91 | loff_t *ppos) | ||
92 | { | ||
93 | unsigned short c; | ||
94 | unsigned char cp; | ||
95 | |||
96 | #if 0 /* Can't seek (pread) on this device */ | ||
97 | if (ppos != &file->f_pos) | ||
98 | return -ESPIPE; | ||
99 | #endif | ||
100 | |||
101 | if (!vfd_is_open) | ||
102 | return -ENODEV; | ||
103 | |||
104 | c = (inb(BRIQ_PANEL_LED_IOPORT) & 0x000c) | (ledpb & 0x0003); | ||
105 | set_led(' '); | ||
106 | /* upper button released */ | ||
107 | if ((!(ledpb & 0x0004)) && (c & 0x0004)) { | ||
108 | cp = ' '; | ||
109 | ledpb = c; | ||
110 | if (copy_to_user(buf, &cp, 1)) | ||
111 | return -EFAULT; | ||
112 | return 1; | ||
113 | } | ||
114 | /* lower button released */ | ||
115 | else if ((!(ledpb & 0x0008)) && (c & 0x0008)) { | ||
116 | cp = '\r'; | ||
117 | ledpb = c; | ||
118 | if (copy_to_user(buf, &cp, 1)) | ||
119 | return -EFAULT; | ||
120 | return 1; | ||
121 | } else { | ||
122 | ledpb = c; | ||
123 | return 0; | ||
124 | } | ||
125 | } | ||
126 | |||
127 | static void scroll_vfd( void ) | ||
128 | { | ||
129 | int i; | ||
130 | |||
131 | for (i=0; i<20; i++) { | ||
132 | vfd[i] = vfd[i+20]; | ||
133 | vfd[i+20] = ' '; | ||
134 | } | ||
135 | vfd_cursor = 20; | ||
136 | } | ||
137 | |||
138 | static ssize_t briq_panel_write(struct file *file, const char *buf, size_t len, | ||
139 | loff_t *ppos) | ||
140 | { | ||
141 | size_t indx = len; | ||
142 | int i, esc = 0; | ||
143 | |||
144 | #if 0 /* Can't seek (pwrite) on this device */ | ||
145 | if (ppos != &file->f_pos) | ||
146 | return -ESPIPE; | ||
147 | #endif | ||
148 | |||
149 | if (!vfd_is_open) | ||
150 | return -EBUSY; | ||
151 | |||
152 | for (;;) { | ||
153 | if (!indx) | ||
154 | break; | ||
155 | if (esc) { | ||
156 | set_led(*buf); | ||
157 | esc = 0; | ||
158 | } else if (*buf == 27) { | ||
159 | esc = 1; | ||
160 | } else if (*buf == 12) { | ||
161 | /* do a form feed */ | ||
162 | for (i=0; i<40; i++) | ||
163 | vfd[i] = ' '; | ||
164 | vfd_cursor = 0; | ||
165 | } else if (*buf == 10) { | ||
166 | if (vfd_cursor < 20) | ||
167 | vfd_cursor = 20; | ||
168 | else if (vfd_cursor < 40) | ||
169 | vfd_cursor = 40; | ||
170 | else if (vfd_cursor < 60) | ||
171 | vfd_cursor = 60; | ||
172 | if (vfd_cursor > 59) | ||
173 | scroll_vfd(); | ||
174 | } else { | ||
175 | /* just a character */ | ||
176 | if (vfd_cursor > 39) | ||
177 | scroll_vfd(); | ||
178 | vfd[vfd_cursor++] = *buf; | ||
179 | } | ||
180 | indx--; | ||
181 | buf++; | ||
182 | } | ||
183 | update_vfd(); | ||
184 | |||
185 | return len; | ||
186 | } | ||
187 | |||
188 | static struct file_operations briq_panel_fops = { | ||
189 | .owner = THIS_MODULE, | ||
190 | .read = briq_panel_read, | ||
191 | .write = briq_panel_write, | ||
192 | .open = briq_panel_open, | ||
193 | .release = briq_panel_release, | ||
194 | }; | ||
195 | |||
196 | static struct miscdevice briq_panel_miscdev = { | ||
197 | BRIQ_PANEL_MINOR, | ||
198 | "briq_panel", | ||
199 | &briq_panel_fops | ||
200 | }; | ||
201 | |||
202 | static int __init briq_panel_init(void) | ||
203 | { | ||
204 | struct device_node *root = find_path_device("/"); | ||
205 | char *machine; | ||
206 | int i; | ||
207 | |||
208 | machine = get_property(root, "model", NULL); | ||
209 | if (!machine || strncmp(machine, "TotalImpact,BRIQ-1", 18) != 0) | ||
210 | return -ENODEV; | ||
211 | |||
212 | printk(KERN_INFO | ||
213 | "briq_panel: v%s Dr. Karsten Jeppesen (kj@totalimpact.com)\n", | ||
214 | BRIQ_PANEL_VER); | ||
215 | |||
216 | if (!request_region(BRIQ_PANEL_VFD_IOPORT, 4, "BRIQ Front Panel")) | ||
217 | return -EBUSY; | ||
218 | |||
219 | if (!request_region(BRIQ_PANEL_LED_IOPORT, 2, "BRIQ Front Panel")) { | ||
220 | release_region(BRIQ_PANEL_VFD_IOPORT, 4); | ||
221 | return -EBUSY; | ||
222 | } | ||
223 | ledpb = inb(BRIQ_PANEL_LED_IOPORT) & 0x000c; | ||
224 | |||
225 | if (misc_register(&briq_panel_miscdev) < 0) { | ||
226 | release_region(BRIQ_PANEL_VFD_IOPORT, 4); | ||
227 | release_region(BRIQ_PANEL_LED_IOPORT, 2); | ||
228 | return -EBUSY; | ||
229 | } | ||
230 | |||
231 | outb(0x38, BRIQ_PANEL_VFD_IOPORT); /* Function set */ | ||
232 | outb(0x01, BRIQ_PANEL_VFD_IOPORT); /* Clear display */ | ||
233 | outb(0x0c, BRIQ_PANEL_VFD_IOPORT); /* Display on */ | ||
234 | outb(0x06, BRIQ_PANEL_VFD_IOPORT); /* Entry normal */ | ||
235 | for (i=0; i<40; i++) | ||
236 | vfd[i]=' '; | ||
237 | #ifndef MODULE | ||
238 | vfd[0] = 'L'; | ||
239 | vfd[1] = 'o'; | ||
240 | vfd[2] = 'a'; | ||
241 | vfd[3] = 'd'; | ||
242 | vfd[4] = 'i'; | ||
243 | vfd[5] = 'n'; | ||
244 | vfd[6] = 'g'; | ||
245 | vfd[7] = ' '; | ||
246 | vfd[8] = '.'; | ||
247 | vfd[9] = '.'; | ||
248 | vfd[10] = '.'; | ||
249 | #endif /* !MODULE */ | ||
250 | |||
251 | update_vfd(); | ||
252 | |||
253 | return 0; | ||
254 | } | ||
255 | |||
256 | static void __exit briq_panel_exit(void) | ||
257 | { | ||
258 | misc_deregister(&briq_panel_miscdev); | ||
259 | release_region(BRIQ_PANEL_VFD_IOPORT, 4); | ||
260 | release_region(BRIQ_PANEL_LED_IOPORT, 2); | ||
261 | } | ||
262 | |||
263 | module_init(briq_panel_init); | ||
264 | module_exit(briq_panel_exit); | ||
265 | |||
266 | MODULE_LICENSE("GPL"); | ||
267 | MODULE_AUTHOR("Karsten Jeppesen <karsten@jeppesens.com>"); | ||
268 | MODULE_DESCRIPTION("Driver for the Total Impact briQ front panel"); | ||