--- linux98-2.5.48/drivers/char/lp_old98.c.98 Tue Nov 19 09:12:07 2002
+++ linux98-2.5.48/drivers/char/lp_old98.c Mon Nov 18 15:31:27 2002
@@ -17,7 +17,8 @@
#include <linux/kernel.h>
#include <linux/major.h>
#include <linux/sched.h>
-#include <linux/malloc.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
#include <linux/ioport.h>
#include <linux/fcntl.h>
#include <linux/delay.h>
@@ -32,23 +33,15 @@
#error This driver works only for NEC PC-9800 series
#endif
-#if LINUX_VERSION_CODE < 0x20200
-# define LP_STATS
-#endif
-
-#if LINUX_VERSION_CODE >= 0x2030b
-# define CONFIG_RESOURCE98
-#endif
-
#include <linux/lp.h>
/*
* I/O port numbers
*/
#define LP_PORT_DATA 0x40
-#define LP_PORT_STATUS (LP_PORT_DATA+2)
-#define LP_PORT_STROBE (LP_PORT_DATA+4)
-#define LP_PORT_CONTROL (LP_PORT_DATA+6)
+#define LP_PORT_STATUS (LP_PORT_DATA + 2)
+#define LP_PORT_STROBE (LP_PORT_DATA + 4)
+#define LP_PORT_CONTROL (LP_PORT_DATA + 6)
#define LP_PORT_H98MODE 0x0448
#define LP_PORT_EXTMODE 0x0149
@@ -73,27 +66,27 @@
/* PC-9800s have at least and at most one old-style printer port. */
static struct lp_struct lp = {
/* Following `TAG: INITIALIZER' notations are GNU CC extension. */
- flags: LP_EXIST | LP_ABORTOPEN,
- chars: LP_INIT_CHAR,
- time: LP_INIT_TIME,
- wait: LP_INIT_WAIT,
+ .flags = LP_EXIST | LP_ABORTOPEN,
+ .chars = LP_INIT_CHAR,
+ .time = LP_INIT_TIME,
+ .wait = LP_INIT_WAIT,
};
static int dc1_check = 1000;
+static spinlock_t lp_old98_lock = SPIN_LOCK_UNLOCKED;
-#undef LP_OLD98_DEBUG
-#ifndef __udelay_val
-# define __udelay_val current_cpu_data.loops_per_sec
-#endif
+#undef LP_OLD98_DEBUG
static inline void nanodelay(unsigned long nanosecs) /* Evil ? */
{
- if( nanosecs ) {
- nanosecs *= (unsigned long)((1ULL << 40) / 1000000000ULL);
- __asm__("mul%L2 %2"
- : "=d"(nanosecs) : "a"(nanosecs), "g"(__udelay_val));
- __delay(nanosecs >> 8);
+ if (nanosecs) {
+ int d0;
+ nanosecs = (nanosecs * 512UL) / 119UL;
+ __asm__("mull %0"
+ :"=d" (nanosecs), "=&a" (d0)
+ :"1" (nanosecs),"0" (current_cpu_data.loops_per_jiffy));
+ __delay(nanosecs * HZ);
}
}
@@ -118,15 +111,14 @@
}
}
-static inline int
-lp_old98_wait_ready(void)
+static inline int lp_old98_wait_ready(void)
{
struct timer_list timer;
init_timer(&timer);
timer.function = lp_old98_timer_function;
timer.expires = jiffies + 1;
- timer.data = (unsigned long) &timer;
+ timer.data = (unsigned long)&timer;
add_timer(&timer);
interruptible_sleep_on(&lp_old98_waitq);
del_timer(&timer);
@@ -140,7 +132,7 @@
int tmp;
#endif
- while( !(inb(LP_PORT_STATUS) & LP_MASK_nBUSY) ) {
+ while (!(inb(LP_PORT_STATUS) & LP_MASK_nBUSY)) {
count++;
if (count >= lp.chars)
return 0;
@@ -153,7 +145,7 @@
* Update lp statsistics here (and between next two outb()'s).
* Time to compute it is part of storobe delay.
*/
- if( count > lp.stats.maxwait ) {
+ if (count > lp.stats.maxwait) {
#ifdef LP_OLD98_DEBUG
printk(KERN_DEBUG "lp_old98: success after %d counts.\n",
count);
@@ -162,7 +154,7 @@
}
count *= 256;
tmp = count - lp.stats.meanwait;
- if( tmp < 0 )
+ if (tmp < 0)
tmp = -tmp;
#endif
nanodelay(lp.wait);
@@ -173,7 +165,7 @@
#ifdef LP_STATS
lp.stats.meanwait = (255 * lp.stats.meanwait + count + 128) / 256;
lp.stats.mdev = (127 * lp.stats.mdev + tmp + 64) / 128;
- lp.stats.chars++;
+ lp.stats.chars ++;
#endif
nanodelay(lp.wait);
@@ -199,7 +191,7 @@
return -EFAULT;
#ifdef LP_STATS
- if( jiffies - lp.lastcall > lp.time )
+ if (jiffies - lp.lastcall > lp.time)
lp.runchars = 0;
lp.lastcall = jiffies;
#endif
@@ -212,17 +204,17 @@
if (__copy_from_user(lp.lp_buffer, buf, copy_size))
return -EFAULT;
- while( bytes_written < copy_size ) {
- if( lp_old98_char(lp.lp_buffer[bytes_written]) )
- bytes_written++;
+ while (bytes_written < copy_size) {
+ if (lp_old98_char(lp.lp_buffer[bytes_written]))
+ bytes_written ++;
else {
#ifdef LP_STATS
int rc = lp.runchars + bytes_written;
- if( rc > lp.stats.maxrun )
+ if (rc > lp.stats.maxrun)
lp.stats.maxrun = rc;
- lp.stats.sleeps++;
+ lp.stats.sleeps ++;
#endif
#ifdef LP_OLD98_DEBUG
printk(KERN_DEBUG
@@ -243,7 +235,7 @@
lp.runchars += bytes_written;
#endif
count -= bytes_written;
- } while( count > 0 );
+ } while (count > 0);
return total_bytes_written;
}
@@ -256,16 +248,16 @@
static int lp_old98_open(struct inode * inode, struct file * file)
{
- if( MINOR(inode->i_rdev) != 0 )
+ if (minor(inode->i_rdev) != 0)
return -ENXIO;
- if( lp.flags & LP_BUSY )
+ if (lp.flags & LP_BUSY)
return -EBUSY;
if ((lp.lp_buffer = kmalloc(LP_BUFFER_SIZE, GFP_KERNEL)) == NULL)
return -ENOMEM;
if (dc1_check && (lp.flags & LP_ABORTOPEN)
- && !(file->f_flags & O_NONBLOCK) ) {
+ && !(file->f_flags & O_NONBLOCK)) {
/*
* Check whether printer is on-line.
* PC-9800's old style port have only BUSY# as status input,
@@ -284,22 +276,22 @@
* `PC-9801 Super Technique', Ascii, 1992.
*/
int count;
- unsigned long eflags;
+ unsigned long flags;
- save_flags(eflags);
- cli(); /* interrupts while check is fairly bad */
+ /* interrupts while check is fairly bad */
+ spin_lock_irqsave(&lp_old98_lock, flags);
if (!lp_old98_char(DC1)) {
- restore_flags(eflags);
+ spin_unlock_irqrestore(&lp_old98_lock, flags);
return -EBUSY;
}
count = (unsigned int)dc1_check > 10000 ? 10000 : dc1_check;
- while( inb(LP_PORT_STATUS) & LP_MASK_nBUSY )
- if( --count == 0 ) {
- restore_flags(eflags);
+ while (inb(LP_PORT_STATUS) & LP_MASK_nBUSY)
+ if (--count == 0) {
+ spin_unlock_irqrestore(&lp_old98_lock, flags);
return -ENODEV;
}
- restore_flags(eflags);
+ spin_unlock_irqrestore(&lp_old98_lock, flags);
}
lp.flags |= LP_BUSY;
@@ -329,14 +321,14 @@
{
unsigned char data;
- if( (data = inb(LP_PORT_EXTMODE)) != 0xFF && (data & 0x10) ) {
+ if ((data = inb(LP_PORT_EXTMODE)) != 0xFF && (data & 0x10)) {
printk(KERN_INFO
"lp_old98: shutting down extended parallel port mode...\n");
outb(data & ~0x10, LP_PORT_EXTMODE);
}
#ifdef PC98_HW_H98
- if( (pc98_hw_flags & PC98_HW_H98)
- && ((data = inb(LP_PORT_H98MODE)) & 0x01) ) {
+ if ((pc98_hw_flags & PC98_HW_H98)
+ && ((data = inb(LP_PORT_H98MODE)) & 0x01)) {
printk(KERN_INFO
"lp_old98: shutting down H98 full centronics mode...\n");
outb(data & ~0x01, LP_PORT_H98MODE);
@@ -358,7 +350,7 @@
{
int retval = 0;
- switch ( command ) {
+ switch (command) {
case LPTIME:
lp.time = arg * HZ/100;
break;
@@ -366,13 +358,13 @@
lp.chars = arg;
break;
case LPABORT:
- if( arg )
+ if (arg)
lp.flags |= LP_ABORT;
else
lp.flags &= ~LP_ABORT;
break;
case LPABORTOPEN:
- if( arg )
+ if (arg)
lp.flags |= LP_ABORTOPEN;
else
lp.flags &= ~LP_ABORTOPEN;
@@ -402,8 +394,8 @@
break;
#ifdef LP_STATS
case LPGETSTATS:
- if( copy_to_user((struct lp_stats *)arg, &lp.stats,
- sizeof(struct lp_stats)) )
+ if (copy_to_user((struct lp_stats *)arg, &lp.stats,
+ sizeof(struct lp_stats)))
retval = -EFAULT;
else if (suser())
memset(&lp.stats, 0, sizeof(struct lp_stats));
@@ -420,13 +412,13 @@
}
static struct file_operations lp_old98_fops = {
- owner: THIS_MODULE,
- llseek: lp_old98_llseek,
- read: NULL,
- write: lp_old98_write,
- ioctl: lp_old98_ioctl,
- open: lp_old98_open,
- release:lp_old98_release,
+ .owner = THIS_MODULE,
+ .llseek = lp_old98_llseek,
+ .read = NULL,
+ .write = lp_old98_write,
+ .ioctl = lp_old98_ioctl,
+ .open = lp_old98_open,
+ .release = lp_old98_release,
};
/*
@@ -494,15 +486,15 @@
static kdev_t lp_old98_console_device(struct console *console)
{
- return MKDEV(LP_MAJOR, 0);
+ return mk_kdev(LP_MAJOR, 0);
}
static struct console lp_old98_console = {
- name: "lp_old98",
- write: lp_old98_console_write,
- device: lp_old98_console_device,
- flags: CON_PRINTBUFFER,
- index: -1,
+ .name = "lp_old98",
+ .write = lp_old98_console_write,
+ .device = lp_old98_console_device,
+ .flags = CON_PRINTBUFFER,
+ .index = -1,
};
#endif /* console on lp_old98 */
@@ -544,7 +536,7 @@
* but for locking out other printer drivers...
*/
#ifdef PC98_HW_H98
- if( pc98_hw_flags & PC98_HW_H98 )
+ if (pc98_hw_flags & PC98_HW_H98)
request_region(LP_PORT_H98MODE, 1, "lp_old98");
#endif
request_region(LP_PORT_EXTMODE, 1, "lp_old98");
@@ -565,7 +557,7 @@
release_region(LP_PORT_STATUS, 1);
release_region(LP_PORT_STROBE, 1);
#ifdef PC98_HW_H98
- if( pc98_hw_flags & PC98_HW_H98 )
+ if (pc98_hw_flags & PC98_HW_H98)
release_region(LP_PORT_H98MODE, 1);
#endif
release_region(LP_PORT_EXTMODE, 1);
@@ -573,5 +565,7 @@
MODULE_PARM(dc1_check, "1i");
MODULE_AUTHOR("Kousuke Takai <[email protected]>");
+MODULE_DESCRIPTION("PC-9800 old printer port driver");
+MODULE_LICENSE("GPL");
#endif