2 * Drivers for the Total Impact PPC based computer "BRIQ"
3 * by Dr. Karsten Jeppesen
7 #include <linux/module.h>
9 #include <linux/types.h>
10 #include <linux/errno.h>
11 #include <linux/tty.h>
12 #include <linux/timer.h>
13 #include <linux/kernel.h>
14 #include <linux/wait.h>
15 #include <linux/string.h>
16 #include <linux/slab.h>
17 #include <linux/ioport.h>
18 #include <linux/delay.h>
19 #include <linux/miscdevice.h>
22 #include <linux/init.h>
24 #include <asm/uaccess.h>
28 #define BRIQ_PANEL_MINOR 156
29 #define BRIQ_PANEL_VFD_IOPORT 0x0390
30 #define BRIQ_PANEL_LED_IOPORT 0x0398
31 #define BRIQ_PANEL_VER "1.1 (04/20/2002)"
32 #define BRIQ_PANEL_MSG0 "Loading Linux"
34 static int vfd_is_open;
35 static unsigned char vfd[40];
36 static int vfd_cursor;
37 static unsigned char ledpb, led;
39 static void update_vfd(void)
44 outb(0x02, BRIQ_PANEL_VFD_IOPORT);
46 outb(vfd[i], BRIQ_PANEL_VFD_IOPORT + 1);
48 /* cursor to next line */
49 outb(0xc0, BRIQ_PANEL_VFD_IOPORT);
51 outb(vfd[i], BRIQ_PANEL_VFD_IOPORT + 1);
55 static void set_led(char state)
59 else if (state == 'G')
61 else if (state == 'Y')
63 else if (state == 'X')
65 outb(led, BRIQ_PANEL_LED_IOPORT);
68 static int briq_panel_open(struct inode *ino, struct file *filep)
70 /* enforce single access */
78 static int briq_panel_release(struct inode *ino, struct file *filep)
88 static ssize_t briq_panel_read(struct file *file, char __user *buf, size_t count,
94 #if 0 /* Can't seek (pread) on this device */
95 if (ppos != &file->f_pos)
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,
142 #if 0 /* Can't seek (pwrite) on this device */
143 if (ppos != &file->f_pos)
154 if (get_user(c, buf))
159 } else if (c == 27) {
161 } else if (c == 12) {
166 } else if (c == 10) {
169 else if (vfd_cursor < 40)
171 else if (vfd_cursor < 60)
176 /* just a character */
179 vfd[vfd_cursor++] = c;
189 static const struct file_operations briq_panel_fops = {
190 .owner = THIS_MODULE,
191 .read = briq_panel_read,
192 .write = briq_panel_write,
193 .open = briq_panel_open,
194 .release = briq_panel_release,
197 static struct miscdevice briq_panel_miscdev = {
203 static int __init briq_panel_init(void)
205 struct device_node *root = of_find_node_by_path("/");
209 machine = of_get_property(root, "model", NULL);
210 if (!machine || strncmp(machine, "TotalImpact,BRIQ-1", 18) != 0) {
217 "briq_panel: v%s Dr. Karsten Jeppesen (kj@totalimpact.com)\n",
220 if (!request_region(BRIQ_PANEL_VFD_IOPORT, 4, "BRIQ Front Panel"))
223 if (!request_region(BRIQ_PANEL_LED_IOPORT, 2, "BRIQ Front Panel")) {
224 release_region(BRIQ_PANEL_VFD_IOPORT, 4);
227 ledpb = inb(BRIQ_PANEL_LED_IOPORT) & 0x000c;
229 if (misc_register(&briq_panel_miscdev) < 0) {
230 release_region(BRIQ_PANEL_VFD_IOPORT, 4);
231 release_region(BRIQ_PANEL_LED_IOPORT, 2);
235 outb(0x38, BRIQ_PANEL_VFD_IOPORT); /* Function set */
236 outb(0x01, BRIQ_PANEL_VFD_IOPORT); /* Clear display */
237 outb(0x0c, BRIQ_PANEL_VFD_IOPORT); /* Display on */
238 outb(0x06, BRIQ_PANEL_VFD_IOPORT); /* Entry normal */
260 static void __exit briq_panel_exit(void)
262 misc_deregister(&briq_panel_miscdev);
263 release_region(BRIQ_PANEL_VFD_IOPORT, 4);
264 release_region(BRIQ_PANEL_LED_IOPORT, 2);
267 module_init(briq_panel_init);
268 module_exit(briq_panel_exit);
270 MODULE_LICENSE("GPL");
271 MODULE_AUTHOR("Karsten Jeppesen <karsten@jeppesens.com>");
272 MODULE_DESCRIPTION("Driver for the Total Impact briQ front panel");