static long dtlk_ioctl(struct file *file,
unsigned int cmd,
unsigned long arg)
{
char __user *argp = (char __user *)arg;
struct dtlk_settings *sp;
char portval;
TRACE_TEXT(" dtlk_ioctl");
switch (cmd) {
case DTLK_INTERROGATE:
mutex_lock(&dtlk_mutex);
sp = dtlk_interrogate();
mutex_unlock(&dtlk_mutex);
if (copy_to_user(argp, sp, sizeof(struct dtlk_settings)))
return -EINVAL;
return 0;
case DTLK_STATUS:
portval = inb_p(dtlk_port_tts);
return put_user(portval, argp);
default:
return -EINVAL;
}
}
static int dtlk_ioctl(struct inode *inode,
struct file *file,
unsigned int cmd,
unsigned long arg)
{
struct dtlk_settings *sp;
char portval;
TRACE_TEXT(" dtlk_ioctl");
switch (cmd) {
case DTLK_INTERROGATE:
sp = dtlk_interrogate();
if (copy_to_user((char *) arg, (char *) sp,
sizeof(struct dtlk_settings)))
return -EINVAL;
return 0;
case DTLK_STATUS:
portval = inb_p(dtlk_port_tts);
return put_user(portval, (char *) arg);
default:
return -EINVAL;
}
}
static int __init dtlk_dev_probe(void)
{
unsigned int testval = 0;
int i = 0;
struct dtlk_settings *sp;
if (dtlk_port_lpc | dtlk_port_tts)
return -EBUSY;
for (i = 0; dtlk_portlist[i]; i++) {
#if 0
printk("DoubleTalk PC - Port %03x = %04x\n",
dtlk_portlist[i], (testval = inw_p(dtlk_portlist[i])));
#endif
if (!request_region(dtlk_portlist[i], DTLK_IO_EXTENT,
"dtlk"))
continue;
testval = inw_p(dtlk_portlist[i]);
if ((testval &= 0xfbff) == 0x107f) {
dtlk_port_lpc = dtlk_portlist[i];
dtlk_port_tts = dtlk_port_lpc + 1;
sp = dtlk_interrogate();
printk("DoubleTalk PC at %03x-%03x, "
"ROM version %s, serial number %u",
dtlk_portlist[i], dtlk_portlist[i] +
DTLK_IO_EXTENT - 1,
sp->rom_version, sp->serial_number);
/* put LPC port into known state, so
dtlk_readable() gives valid result */
outb_p(0xff, dtlk_port_lpc);
/* INIT string and index marker */
dtlk_write_bytes("\036\1@\0\0012I\r", 8);
/* posting an index takes 18 msec. Here, we
wait up to 100 msec to see whether it
appears. */
msleep_interruptible(100);
dtlk_has_indexing = dtlk_readable();
#ifdef TRACING
printk(", indexing %d\n", dtlk_has_indexing);
#endif
#ifdef INSCOPE
{
/* This macro records ten samples read from the LPC port, for later display */
#define LOOK \
for (i = 0; i < 10; i++) \
{ \
buffer[b++] = inb_p(dtlk_port_lpc); \
__delay(loops_per_jiffy/(1000000/HZ)); \
}
char buffer[1000];
int b = 0, i, j;
LOOK
outb_p(0xff, dtlk_port_lpc);
buffer[b++] = 0;
LOOK
dtlk_write_bytes("\0012I\r", 4);
buffer[b++] = 0;
__delay(50 * loops_per_jiffy / (1000/HZ));
outb_p(0xff, dtlk_port_lpc);
buffer[b++] = 0;
LOOK
printk("\n");
for (j = 0; j < b; j++)
printk(" %02x", buffer[j]);
printk("\n");
}
#endif /* INSCOPE */
#ifdef OUTSCOPE
{
/* This macro records ten samples read from the TTS port, for later display */
#define LOOK \
for (i = 0; i < 10; i++) \
{ \
buffer[b++] = inb_p(dtlk_port_tts); \
__delay(loops_per_jiffy/(1000000/HZ)); /* 1 us */ \
}
char buffer[1000];
int b = 0, i, j;
mdelay(10); /* 10 ms */
LOOK
outb_p(0x03, dtlk_port_tts);
buffer[b++] = 0;
LOOK
LOOK
printk("\n");
for (j = 0; j < b; j++)
printk(" %02x", buffer[j]);
printk("\n");
}
#endif /* OUTSCOPE */
dtlk_write_bytes("Double Talk found", 18);
return 0;
}
release_region(dtlk_portlist[i], DTLK_IO_EXTENT);
}
printk(KERN_INFO "DoubleTalk PC - not found\n");
return -ENODEV;
}