[POWERPC] Add support for briq front panel
This adds the driver for the Briq front panel. This is a cleaned up version of a driver that has been floating around for some time now, initially written by Karsten Jeppesen <karsten@jeppesens.com> and cleaned up by jk and myself. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
parent
26c5032eaa
commit
a45b83957d
3 changed files with 283 additions and 0 deletions
|
@ -495,6 +495,20 @@ config LEGACY_PTY_COUNT
|
|||
When not in use, each legacy PTY occupies 12 bytes on 32-bit
|
||||
architectures and 24 bytes on 64-bit architectures.
|
||||
|
||||
config BRIQ_PANEL
|
||||
tristate 'Total Impact briQ front panel driver'
|
||||
---help---
|
||||
The briQ is a small footprint CHRP computer with a frontpanel VFD, a
|
||||
tristate led and two switches. It is the size of a CDROM drive.
|
||||
|
||||
If you have such one and want anything showing on the VFD then you
|
||||
must answer Y here.
|
||||
|
||||
To compile this driver as a module, choose M here: the
|
||||
module will be called briq_panel.
|
||||
|
||||
It's safe to say N here.
|
||||
|
||||
config PRINTER
|
||||
tristate "Parallel printer support"
|
||||
depends on PARPORT
|
||||
|
|
|
@ -51,6 +51,7 @@ obj-$(CONFIG_VIOCONS) += viocons.o
|
|||
obj-$(CONFIG_VIOTAPE) += viotape.o
|
||||
obj-$(CONFIG_HVCS) += hvcs.o
|
||||
obj-$(CONFIG_SGI_MBCS) += mbcs.o
|
||||
obj-$(CONFIG_BRIQ_PANEL) += briq_panel.o
|
||||
|
||||
obj-$(CONFIG_PRINTER) += lp.o
|
||||
obj-$(CONFIG_TIPAR) += tipar.o
|
||||
|
|
268
drivers/char/briq_panel.c
Normal file
268
drivers/char/briq_panel.c
Normal file
|
@ -0,0 +1,268 @@
|
|||
/*
|
||||
* Drivers for the Total Impact PPC based computer "BRIQ"
|
||||
* by Dr. Karsten Jeppesen
|
||||
*
|
||||
*/
|
||||
|
||||
#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/slab.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>
|
||||
#include <asm/prom.h>
|
||||
|
||||
#define BRIQ_PANEL_MINOR 156
|
||||
#define BRIQ_PANEL_VFD_IOPORT 0x0390
|
||||
#define BRIQ_PANEL_LED_IOPORT 0x0398
|
||||
#define BRIQ_PANEL_VER "1.1 (04/20/2002)"
|
||||
#define BRIQ_PANEL_MSG0 "Loading Linux"
|
||||
|
||||
static int vfd_is_open;
|
||||
static unsigned char vfd[40];
|
||||
static int vfd_cursor;
|
||||
static unsigned char ledpb, led;
|
||||
|
||||
static void update_vfd(void)
|
||||
{
|
||||
int i;
|
||||
|
||||
/* cursor home */
|
||||
outb(0x02, BRIQ_PANEL_VFD_IOPORT);
|
||||
for (i=0; i<20; i++)
|
||||
outb(vfd[i], BRIQ_PANEL_VFD_IOPORT + 1);
|
||||
|
||||
/* cursor to next line */
|
||||
outb(0xc0, BRIQ_PANEL_VFD_IOPORT);
|
||||
for (i=20; i<40; i++)
|
||||
outb(vfd[i], BRIQ_PANEL_VFD_IOPORT + 1);
|
||||
|
||||
}
|
||||
|
||||
static void set_led(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, BRIQ_PANEL_LED_IOPORT);
|
||||
}
|
||||
|
||||
static int briq_panel_open(struct inode *ino, struct file *filep)
|
||||
{
|
||||
/* enforce single access */
|
||||
if (vfd_is_open)
|
||||
return -EBUSY;
|
||||
vfd_is_open = 1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int briq_panel_release(struct inode *ino, struct file *filep)
|
||||
{
|
||||
if (!vfd_is_open)
|
||||
return -ENODEV;
|
||||
|
||||
vfd_is_open = 0;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static ssize_t briq_panel_read(struct file *file, char *buf, size_t count,
|
||||
loff_t *ppos)
|
||||
{
|
||||
unsigned short c;
|
||||
unsigned char cp;
|
||||
|
||||
#if 0 /* Can't seek (pread) on this device */
|
||||
if (ppos != &file->f_pos)
|
||||
return -ESPIPE;
|
||||
#endif
|
||||
|
||||
if (!vfd_is_open)
|
||||
return -ENODEV;
|
||||
|
||||
c = (inb(BRIQ_PANEL_LED_IOPORT) & 0x000c) | (ledpb & 0x0003);
|
||||
set_led(' ');
|
||||
/* upper button released */
|
||||
if ((!(ledpb & 0x0004)) && (c & 0x0004)) {
|
||||
cp = ' ';
|
||||
ledpb = c;
|
||||
if (copy_to_user(buf, &cp, 1))
|
||||
return -EFAULT;
|
||||
return 1;
|
||||
}
|
||||
/* lower button released */
|
||||
else if ((!(ledpb & 0x0008)) && (c & 0x0008)) {
|
||||
cp = '\r';
|
||||
ledpb = c;
|
||||
if (copy_to_user(buf, &cp, 1))
|
||||
return -EFAULT;
|
||||
return 1;
|
||||
} else {
|
||||
ledpb = c;
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
static void scroll_vfd( void )
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i=0; i<20; i++) {
|
||||
vfd[i] = vfd[i+20];
|
||||
vfd[i+20] = ' ';
|
||||
}
|
||||
vfd_cursor = 20;
|
||||
}
|
||||
|
||||
static ssize_t briq_panel_write(struct file *file, const char *buf, size_t len,
|
||||
loff_t *ppos)
|
||||
{
|
||||
size_t indx = len;
|
||||
int i, esc = 0;
|
||||
|
||||
#if 0 /* Can't seek (pwrite) on this device */
|
||||
if (ppos != &file->f_pos)
|
||||
return -ESPIPE;
|
||||
#endif
|
||||
|
||||
if (!vfd_is_open)
|
||||
return -EBUSY;
|
||||
|
||||
for (;;) {
|
||||
if (!indx)
|
||||
break;
|
||||
if (esc) {
|
||||
set_led(*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)
|
||||
scroll_vfd();
|
||||
} else {
|
||||
/* just a character */
|
||||
if (vfd_cursor > 39)
|
||||
scroll_vfd();
|
||||
vfd[vfd_cursor++] = *buf;
|
||||
}
|
||||
indx--;
|
||||
buf++;
|
||||
}
|
||||
update_vfd();
|
||||
|
||||
return len;
|
||||
}
|
||||
|
||||
static struct file_operations briq_panel_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.read = briq_panel_read,
|
||||
.write = briq_panel_write,
|
||||
.open = briq_panel_open,
|
||||
.release = briq_panel_release,
|
||||
};
|
||||
|
||||
static struct miscdevice briq_panel_miscdev = {
|
||||
BRIQ_PANEL_MINOR,
|
||||
"briq_panel",
|
||||
&briq_panel_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
|
||||
"briq_panel: v%s Dr. Karsten Jeppesen (kj@totalimpact.com)\n",
|
||||
BRIQ_PANEL_VER);
|
||||
|
||||
if (!request_region(BRIQ_PANEL_VFD_IOPORT, 4, "BRIQ Front Panel"))
|
||||
return -EBUSY;
|
||||
|
||||
if (!request_region(BRIQ_PANEL_LED_IOPORT, 2, "BRIQ Front Panel")) {
|
||||
release_region(BRIQ_PANEL_VFD_IOPORT, 4);
|
||||
return -EBUSY;
|
||||
}
|
||||
ledpb = inb(BRIQ_PANEL_LED_IOPORT) & 0x000c;
|
||||
|
||||
if (misc_register(&briq_panel_miscdev) < 0) {
|
||||
release_region(BRIQ_PANEL_VFD_IOPORT, 4);
|
||||
release_region(BRIQ_PANEL_LED_IOPORT, 2);
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
outb(0x38, BRIQ_PANEL_VFD_IOPORT); /* Function set */
|
||||
outb(0x01, BRIQ_PANEL_VFD_IOPORT); /* Clear display */
|
||||
outb(0x0c, BRIQ_PANEL_VFD_IOPORT); /* Display on */
|
||||
outb(0x06, BRIQ_PANEL_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 */
|
||||
|
||||
update_vfd();
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __exit briq_panel_exit(void)
|
||||
{
|
||||
misc_deregister(&briq_panel_miscdev);
|
||||
release_region(BRIQ_PANEL_VFD_IOPORT, 4);
|
||||
release_region(BRIQ_PANEL_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");
|
Loading…
Reference in a new issue