2 * Drivers for the Total Impact PPC based computer "BRIQ"
3 * by Dr. Karsten Jeppesen
7 #include <linux/module.h>
9 #include <linux/smp_lock.h>
10 #include <linux/types.h>
11 #include <linux/errno.h>
12 #include <linux/tty.h>
13 #include <linux/timer.h>
14 #include <linux/kernel.h>
15 #include <linux/wait.h>
16 #include <linux/string.h>
17 #include <linux/slab.h>
18 #include <linux/ioport.h>
19 #include <linux/delay.h>
20 #include <linux/miscdevice.h>
23 #include <linux/init.h>
25 #include <asm/uaccess.h>
29 #define BRIQ_PANEL_MINOR 156
30 #define BRIQ_PANEL_VFD_IOPORT 0x0390
31 #define BRIQ_PANEL_LED_IOPORT 0x0398
32 #define BRIQ_PANEL_VER "1.1 (04/20/2002)"
33 #define BRIQ_PANEL_MSG0 "Loading Linux"
35 static int vfd_is_open;
36 static unsigned char vfd[40];
37 static int vfd_cursor;
38 static unsigned char ledpb, led;
40 static void update_vfd(void)
45 outb(0x02, BRIQ_PANEL_VFD_IOPORT);
47 outb(vfd[i], BRIQ_PANEL_VFD_IOPORT + 1);
49 /* cursor to next line */
50 outb(0xc0, BRIQ_PANEL_VFD_IOPORT);
52 outb(vfd[i], BRIQ_PANEL_VFD_IOPORT + 1);
56 static void set_led(char state)
60 else if (state == 'G')
62 else if (state == 'Y')
64 else if (state == 'X')
66 outb(led, BRIQ_PANEL_LED_IOPORT);
69 static int briq_panel_open(struct inode *ino, struct file *filep)
72 /* enforce single access, vfd_is_open is protected by BKL */
83 static int briq_panel_release(struct inode *ino, struct file *filep)
93 static ssize_t briq_panel_read(struct file *file, char __user *buf, size_t count,
102 c = (inb(BRIQ_PANEL_LED_IOPORT) & 0x000c) | (ledpb & 0x0003);
104 /* upper button released */
105 if ((!(ledpb & 0x0004)) && (c & 0x0004)) {
108 if (copy_to_user(buf, &cp, 1))
112 /* lower button released */
113 else if ((!(ledpb & 0x0008)) && (c & 0x0008)) {
116 if (copy_to_user(buf, &cp, 1))
125 static void scroll_vfd( void )
129 for (i=0; i<20; i++) {
136 static ssize_t briq_panel_write(struct file *file, const char __user *buf, size_t len,
149 if (get_user(c, buf))
154 } else if (c == 27) {
156 } else if (c == 12) {
161 } else if (c == 10) {
164 else if (vfd_cursor < 40)
166 else if (vfd_cursor < 60)
171 /* just a character */
174 vfd[vfd_cursor++] = c;
184 static const struct file_operations briq_panel_fops = {
185 .owner = THIS_MODULE,
186 .read = briq_panel_read,
187 .write = briq_panel_write,
188 .open = briq_panel_open,
189 .release = briq_panel_release,
192 static struct miscdevice briq_panel_miscdev = {
198 static int __init briq_panel_init(void)
200 struct device_node *root = of_find_node_by_path("/");
204 machine = of_get_property(root, "model", NULL);
205 if (!machine || strncmp(machine, "TotalImpact,BRIQ-1", 18) != 0) {
212 "briq_panel: v%s Dr. Karsten Jeppesen (kj@totalimpact.com)\n",
215 if (!request_region(BRIQ_PANEL_VFD_IOPORT, 4, "BRIQ Front Panel"))
218 if (!request_region(BRIQ_PANEL_LED_IOPORT, 2, "BRIQ Front Panel")) {
219 release_region(BRIQ_PANEL_VFD_IOPORT, 4);
222 ledpb = inb(BRIQ_PANEL_LED_IOPORT) & 0x000c;
224 if (misc_register(&briq_panel_miscdev) < 0) {
225 release_region(BRIQ_PANEL_VFD_IOPORT, 4);
226 release_region(BRIQ_PANEL_LED_IOPORT, 2);
230 outb(0x38, BRIQ_PANEL_VFD_IOPORT); /* Function set */
231 outb(0x01, BRIQ_PANEL_VFD_IOPORT); /* Clear display */
232 outb(0x0c, BRIQ_PANEL_VFD_IOPORT); /* Display on */
233 outb(0x06, BRIQ_PANEL_VFD_IOPORT); /* Entry normal */
255 static void __exit briq_panel_exit(void)
257 misc_deregister(&briq_panel_miscdev);
258 release_region(BRIQ_PANEL_VFD_IOPORT, 4);
259 release_region(BRIQ_PANEL_LED_IOPORT, 2);
262 module_init(briq_panel_init);
263 module_exit(briq_panel_exit);
265 MODULE_LICENSE("GPL");
266 MODULE_AUTHOR("Karsten Jeppesen <karsten@jeppesens.com>");
267 MODULE_DESCRIPTION("Driver for the Total Impact briQ front panel");