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/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>
24 #include <linux/init.h>
26 #include <asm/uaccess.h>
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"
36 static int vfd_is_open;
37 static unsigned char vfd[40];
38 static int vfd_cursor;
39 static unsigned char ledpb, led;
41 static void update_vfd(void)
46 outb(0x02, BRIQ_PANEL_VFD_IOPORT);
48 outb(vfd[i], BRIQ_PANEL_VFD_IOPORT + 1);
50 /* cursor to next line */
51 outb(0xc0, BRIQ_PANEL_VFD_IOPORT);
53 outb(vfd[i], BRIQ_PANEL_VFD_IOPORT + 1);
57 static void set_led(char state)
61 else if (state == 'G')
63 else if (state == 'Y')
65 else if (state == 'X')
67 outb(led, BRIQ_PANEL_LED_IOPORT);
70 static int briq_panel_open(struct inode *ino, struct file *filep)
72 /* enforce single access */
80 static int briq_panel_release(struct inode *ino, struct file *filep)
90 static ssize_t briq_panel_read(struct file *file, char __user *buf, size_t count,
96 #if 0 /* Can't seek (pread) on this device */
97 if (ppos != &file->f_pos)
104 c = (inb(BRIQ_PANEL_LED_IOPORT) & 0x000c) | (ledpb & 0x0003);
106 /* upper button released */
107 if ((!(ledpb & 0x0004)) && (c & 0x0004)) {
110 if (copy_to_user(buf, &cp, 1))
114 /* lower button released */
115 else if ((!(ledpb & 0x0008)) && (c & 0x0008)) {
118 if (copy_to_user(buf, &cp, 1))
127 static void scroll_vfd( void )
131 for (i=0; i<20; i++) {
138 static ssize_t briq_panel_write(struct file *file, const char __user *buf, size_t len,
144 #if 0 /* Can't seek (pwrite) on this device */
145 if (ppos != &file->f_pos)
156 if (get_user(c, buf))
161 } else if (c == 27) {
163 } else if (c == 12) {
168 } else if (c == 10) {
171 else if (vfd_cursor < 40)
173 else if (vfd_cursor < 60)
178 /* just a character */
181 vfd[vfd_cursor++] = c;
191 static struct file_operations briq_panel_fops = {
192 .owner = THIS_MODULE,
193 .read = briq_panel_read,
194 .write = briq_panel_write,
195 .open = briq_panel_open,
196 .release = briq_panel_release,
199 static struct miscdevice briq_panel_miscdev = {
205 static int __init briq_panel_init(void)
207 struct device_node *root = find_path_device("/");
211 machine = get_property(root, "model", NULL);
212 if (!machine || strncmp(machine, "TotalImpact,BRIQ-1", 18) != 0)
216 "briq_panel: v%s Dr. Karsten Jeppesen (kj@totalimpact.com)\n",
219 if (!request_region(BRIQ_PANEL_VFD_IOPORT, 4, "BRIQ Front Panel"))
222 if (!request_region(BRIQ_PANEL_LED_IOPORT, 2, "BRIQ Front Panel")) {
223 release_region(BRIQ_PANEL_VFD_IOPORT, 4);
226 ledpb = inb(BRIQ_PANEL_LED_IOPORT) & 0x000c;
228 if (misc_register(&briq_panel_miscdev) < 0) {
229 release_region(BRIQ_PANEL_VFD_IOPORT, 4);
230 release_region(BRIQ_PANEL_LED_IOPORT, 2);
234 outb(0x38, BRIQ_PANEL_VFD_IOPORT); /* Function set */
235 outb(0x01, BRIQ_PANEL_VFD_IOPORT); /* Clear display */
236 outb(0x0c, BRIQ_PANEL_VFD_IOPORT); /* Display on */
237 outb(0x06, BRIQ_PANEL_VFD_IOPORT); /* Entry normal */
259 static void __exit briq_panel_exit(void)
261 misc_deregister(&briq_panel_miscdev);
262 release_region(BRIQ_PANEL_VFD_IOPORT, 4);
263 release_region(BRIQ_PANEL_LED_IOPORT, 2);
266 module_init(briq_panel_init);
267 module_exit(briq_panel_exit);
269 MODULE_LICENSE("GPL");
270 MODULE_AUTHOR("Karsten Jeppesen <karsten@jeppesens.com>");
271 MODULE_DESCRIPTION("Driver for the Total Impact briQ front panel");