patch-2.4.22 linux-2.4.22/drivers/char/briq_panel.c
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- Lines: 252
- Date:
2003-08-25 04:44:41.000000000 -0700
- Orig file:
linux-2.4.21/drivers/char/briq_panel.c
- Orig date:
1969-12-31 16:00:00.000000000 -0800
diff -urN linux-2.4.21/drivers/char/briq_panel.c linux-2.4.22/drivers/char/briq_panel.c
@@ -0,0 +1,251 @@
+/*
+ * Drivers for the Total Impact PPC based computer "BRIQ"
+ * by Dr. Karsten Jeppesen
+ *
+ *
+ * 010407 Coding started
+ *
+ * 04/20/2002 1.1 Adapted to 2.4, small cleanups
+ */
+
+#include <linux/module.h>
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/tty.h>
+#include <linux/timer.h>
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/wait.h>
+#include <linux/string.h>
+#include <linux/malloc.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/miscdevice.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/init.h>
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+#define TOTALIMPACT_VFD_MINOR 156
+#define VFD_IOPORT 0x0390
+#define LED_IOPORT 0x0398
+#define TI_VER "1.1 (04/20/2002)"
+#define TI_MSG0 "Loading Linux"
+
+static int vfd_is_open;
+static unsigned char vfd[40];
+static int vfd_cursor;
+static unsigned char ledpb, led;
+
+
+static void UpdateVFD( void )
+{
+ int i;
+ outb(0x02, VFD_IOPORT); /* cursor home */
+ for (i=0; i<20; i++) outb(vfd[i], VFD_IOPORT + 1);
+ outb(0xc0, VFD_IOPORT); /* cursor to next line */
+ for (i=20; i<40; i++) outb(vfd[i], VFD_IOPORT + 1);
+
+}
+
+static void SetLED( char state)
+{
+ if ( state == 'R' ) led = 0x01;
+ else if ( state == 'G' ) led = 0x02;
+ else if ( state == 'Y' ) led = 0x03;
+ else if ( state == 'X' ) led = 0x00;
+ outb(led, LED_IOPORT);
+}
+
+static int do_open(struct inode *ino, struct file *filep)
+{
+ if (vfd_is_open) return -EBUSY;
+ MOD_INC_USE_COUNT;
+ vfd_is_open = 1;
+ return(0);
+}
+
+static int do_release(struct inode *ino, struct file *filep)
+{
+ if (!vfd_is_open) return -ENODEV;
+ MOD_DEC_USE_COUNT;
+ vfd_is_open = 0;
+ return(0);
+}
+
+
+static ssize_t do_read(struct file *file, char *buf, size_t count,
+ loff_t *ppos)
+{
+ unsigned short c;
+ unsigned char cp;
+
+ /* Can't seek (pread) on this device */
+ if (ppos != &file->f_pos) return -ESPIPE;
+ if (!vfd_is_open) return -ENODEV;
+ c = (inb( LED_IOPORT ) & 0x000c) | (ledpb & 0x0003);
+ SetLED(' ');
+ if ((!(ledpb & 0x0004)) && (c & 0x0004))
+ { /* upper button released */
+ cp = ' ';
+ ledpb = c;
+ if (copy_to_user(buf, &cp, 1)) return -EFAULT;
+ return(1);
+ }
+ else if ((!(ledpb & 0x0008)) && (c & 0x0008))
+ { /* lower button released */
+ cp = '\r';
+ ledpb = c;
+ if (copy_to_user(buf, &cp, 1)) return -EFAULT;
+ return(1);
+ } else
+ {
+ ledpb = c;
+ return(0);
+ }
+}
+
+
+static void ScrollVFD( void )
+{
+ int i;
+ for (i=0; i<20; i++)
+ {
+ vfd[i] = vfd[i+20];
+ vfd[i+20] = ' ';
+ }
+ vfd_cursor = 20;
+}
+
+
+static ssize_t do_write(struct file *file, const char *buf, size_t len,
+ loff_t *ppos)
+{
+ size_t indx = len;
+ int i, esc=0;
+ /* Can't seek (pwrite) on this device */
+ if (ppos != &file->f_pos) return -ESPIPE;
+ if (!vfd_is_open) return -EBUSY;
+ for (;;)
+ {
+ if (!indx) break;
+ if (esc)
+ {
+ SetLED(*buf);
+ esc = 0;
+ }
+ else if (*buf == 27)
+ {
+ esc = 1;
+ }
+ else if (*buf == 12)
+ { /* do a form feed */
+ for (i=0; i<40; i++) vfd[i] = ' ';
+ vfd_cursor = 0;
+ }
+ else if (*buf == 10)
+ {
+ if (vfd_cursor < 20) vfd_cursor = 20;
+ else if (vfd_cursor < 40) vfd_cursor = 40;
+ else if (vfd_cursor < 60) vfd_cursor = 60;
+ if (vfd_cursor > 59) ScrollVFD();
+ }
+ else
+ {
+ /* just a character */
+ if (vfd_cursor > 39) ScrollVFD();
+ vfd[vfd_cursor++] = *buf;
+ }
+ indx--;
+ buf++;
+ }
+ UpdateVFD();
+ return len;
+}
+
+
+static struct file_operations vfd_fops = {
+ read: do_read, /* Read */
+ write: do_write, /* Write */
+ open: do_open, /* Open */
+ release: do_release, /* Release */
+};
+
+
+static struct miscdevice ti_vfd_miscdev = {
+ TOTALIMPACT_VFD_MINOR,
+ "vfd",
+ &vfd_fops
+};
+
+
+static int __init briq_panel_init(void)
+{
+ struct device_node *root = find_path_device("/");
+ char *machine;
+ int i;
+
+ machine = get_property(root, "model", NULL);
+ if (!machine || strncmp(machine, "TotalImpact,BRIQ-1", 18) != 0)
+ return -ENODEV;
+
+ printk(KERN_INFO "ti_briq: v%s Dr. Karsten Jeppesen (kj@totalimpact.com)\n", TI_VER);
+
+ if (!request_region( VFD_IOPORT, 4, "BRIQ Front Panel"))
+ return -EBUSY;
+ if (!request_region( LED_IOPORT, 2, "BRIQ Front Panel")) {
+ release_region(VFD_IOPORT, 4);
+ return -EBUSY;
+ }
+ ledpb = inb( LED_IOPORT ) & 0x000c;
+
+ if (misc_register(&ti_vfd_miscdev) < 0) {
+ release_region(VFD_IOPORT, 4);
+ release_region(LED_IOPORT, 2);
+ return -EBUSY;
+ }
+
+ outb(0x38, VFD_IOPORT); /* Function set */
+ outb(0x01, VFD_IOPORT); /* Clear display */
+ outb(0x0c, VFD_IOPORT); /* Display on */
+ outb(0x06, VFD_IOPORT); /* Entry normal */
+ for (i=0; i<40; i++) vfd[i]=' ';
+#ifndef MODULE
+ vfd[0] = 'L';
+ vfd[1] = 'o';
+ vfd[2] = 'a';
+ vfd[3] = 'd';
+ vfd[4] = 'i';
+ vfd[5] = 'n';
+ vfd[6] = 'g';
+ vfd[7] = ' ';
+ vfd[8] = '.';
+ vfd[9] = '.';
+ vfd[10] = '.';
+#endif /* !MODULE */
+ UpdateVFD();
+
+ return 0;
+}
+
+
+static void __exit briq_panel_exit(void)
+{
+ misc_deregister(&ti_vfd_miscdev);
+ release_region(VFD_IOPORT, 4);
+ release_region(LED_IOPORT, 2);
+}
+
+
+module_init(briq_panel_init);
+module_exit(briq_panel_exit);
+
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Karsten Jeppesen <karsten@jeppesens.com>");
+MODULE_DESCRIPTION("Driver for the Total Impact briQ front panel");
+EXPORT_NO_SYMBOLS;
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