/*
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/*
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* Copyright (C) 1992 by Jim Weigand and Linus Torvalds
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* Copyright (C) 1992 by Jim Weigand and Linus Torvalds
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* Copyright (C) 1992,1993 by Michael K. Johnson
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* Copyright (C) 1992,1993 by Michael K. Johnson
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* - Thanks much to Gunter Windau for pointing out to me where the error
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* - Thanks much to Gunter Windau for pointing out to me where the error
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* checking ought to be.
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* checking ought to be.
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* Copyright (C) 1993 by Nigel Gamble (added interrupt code)
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* Copyright (C) 1993 by Nigel Gamble (added interrupt code)
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* Copyright (C) 1994 by Alan Cox (Modularised it)
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* Copyright (C) 1994 by Alan Cox (Modularised it)
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* LPCAREFUL, LPABORT, LPGETSTATUS added by Chris Metcalf, metcalf@lcs.mit.edu
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* LPCAREFUL, LPABORT, LPGETSTATUS added by Chris Metcalf, metcalf@lcs.mit.edu
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* Statistics and support for slow printers by Rob Janssen, rob@knoware.nl
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* Statistics and support for slow printers by Rob Janssen, rob@knoware.nl
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* "lp=" command line parameters added by Grant Guenther, grant@torque.net
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* "lp=" command line parameters added by Grant Guenther, grant@torque.net
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*/
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*/
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|
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#include <linux/module.h>
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#include <linux/module.h>
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|
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#include <linux/errno.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/kernel.h>
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#include <linux/major.h>
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#include <linux/major.h>
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#include <linux/sched.h>
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#include <linux/sched.h>
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#include <linux/lp.h>
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#include <linux/lp.h>
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#include <linux/malloc.h>
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#include <linux/malloc.h>
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#include <linux/ioport.h>
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#include <linux/ioport.h>
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#include <linux/fcntl.h>
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#include <linux/fcntl.h>
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#include <linux/delay.h>
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#include <linux/delay.h>
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|
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#include <asm/io.h>
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#include <asm/io.h>
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#include <asm/segment.h>
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#include <asm/segment.h>
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#include <asm/system.h>
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#include <asm/system.h>
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|
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#define NO_IRQ (-1)
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#define NO_IRQ (-1)
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|
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/* the BIOS manuals say there can be up to 4 lpt devices
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/* the BIOS manuals say there can be up to 4 lpt devices
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* but I have not seen a board where the 4th address is listed
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* but I have not seen a board where the 4th address is listed
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* if you have different hardware change the table below
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* if you have different hardware change the table below
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* please let me know if you have different equipment
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* please let me know if you have different equipment
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* if you have more than 3 printers, remember to increase LP_NO
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* if you have more than 3 printers, remember to increase LP_NO
|
*/
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*/
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struct lp_struct lp_table[] = {
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struct lp_struct lp_table[] = {
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{ 0x3bc, NO_IRQ, 0, LP_INIT_CHAR, LP_INIT_TIME, LP_INIT_WAIT, NULL, NULL, 0, 0, 0, {0} },
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{ 0x3bc, NO_IRQ, 0, LP_INIT_CHAR, LP_INIT_TIME, LP_INIT_WAIT, NULL, NULL, 0, 0, 0, {0} },
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{ 0x378, NO_IRQ, 0, LP_INIT_CHAR, LP_INIT_TIME, LP_INIT_WAIT, NULL, NULL, 0, 0, 0, {0} },
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{ 0x378, NO_IRQ, 0, LP_INIT_CHAR, LP_INIT_TIME, LP_INIT_WAIT, NULL, NULL, 0, 0, 0, {0} },
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{ 0x278, NO_IRQ, 0, LP_INIT_CHAR, LP_INIT_TIME, LP_INIT_WAIT, NULL, NULL, 0, 0, 0, {0} },
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{ 0x278, NO_IRQ, 0, LP_INIT_CHAR, LP_INIT_TIME, LP_INIT_WAIT, NULL, NULL, 0, 0, 0, {0} },
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};
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};
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#define LP_NO 3
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#define LP_NO 3
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|
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/* Test if printer is ready (and optionally has no error conditions) */
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/* Test if printer is ready (and optionally has no error conditions) */
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#define LP_READY(minor, status) \
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#define LP_READY(minor, status) \
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((LP_F(minor) & LP_CAREFUL) ? _LP_CAREFUL_READY(status) : (status & LP_PBUSY))
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((LP_F(minor) & LP_CAREFUL) ? _LP_CAREFUL_READY(status) : (status & LP_PBUSY))
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#define LP_CAREFUL_READY(minor, status) \
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#define LP_CAREFUL_READY(minor, status) \
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((LP_F(minor) & LP_CAREFUL) ? _LP_CAREFUL_READY(status) : 1)
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((LP_F(minor) & LP_CAREFUL) ? _LP_CAREFUL_READY(status) : 1)
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#define _LP_CAREFUL_READY(status) \
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#define _LP_CAREFUL_READY(status) \
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(status & (LP_PBUSY|LP_POUTPA|LP_PSELECD|LP_PERRORP)) == \
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(status & (LP_PBUSY|LP_POUTPA|LP_PSELECD|LP_PERRORP)) == \
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(LP_PBUSY|LP_PSELECD|LP_PERRORP)
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(LP_PBUSY|LP_PSELECD|LP_PERRORP)
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|
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/*
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/*
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* All my debugging code assumes that you debug with only one printer at
|
* All my debugging code assumes that you debug with only one printer at
|
* a time. RWWH
|
* a time. RWWH
|
* Debug info moved into stats area, so this is no longer true (Rob Janssen)
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* Debug info moved into stats area, so this is no longer true (Rob Janssen)
|
*/
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*/
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|
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#undef LP_DEBUG
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#undef LP_DEBUG
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|
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static int lp_reset(int minor)
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static int lp_reset(int minor)
|
{
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{
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outb_p(LP_PSELECP, LP_C(minor));
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outb_p(LP_PSELECP, LP_C(minor));
|
udelay(LP_DELAY);
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udelay(LP_DELAY);
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outb_p(LP_PSELECP | LP_PINITP, LP_C(minor));
|
outb_p(LP_PSELECP | LP_PINITP, LP_C(minor));
|
return LP_S(minor);
|
return LP_S(minor);
|
}
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}
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|
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static inline int lp_char_polled(char lpchar, int minor)
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static inline int lp_char_polled(char lpchar, int minor)
|
{
|
{
|
int status, wait = 0;
|
int status, wait = 0;
|
unsigned long count = 0;
|
unsigned long count = 0;
|
struct lp_stats *stats;
|
struct lp_stats *stats;
|
|
|
do {
|
do {
|
status = LP_S(minor);
|
status = LP_S(minor);
|
count ++;
|
count ++;
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if(need_resched)
|
if(need_resched)
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schedule();
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schedule();
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} while(!LP_READY(minor,status) && count < LP_CHAR(minor));
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} while(!LP_READY(minor,status) && count < LP_CHAR(minor));
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|
|
if (count == LP_CHAR(minor)) {
|
if (count == LP_CHAR(minor)) {
|
return 0;
|
return 0;
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/* we timed out, and the character was /not/ printed */
|
/* we timed out, and the character was /not/ printed */
|
}
|
}
|
outb_p(lpchar, LP_B(minor));
|
outb_p(lpchar, LP_B(minor));
|
stats = &LP_STAT(minor);
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stats = &LP_STAT(minor);
|
stats->chars++;
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stats->chars++;
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/* must wait before taking strobe high, and after taking strobe
|
/* must wait before taking strobe high, and after taking strobe
|
low, according spec. Some printers need it, others don't. */
|
low, according spec. Some printers need it, others don't. */
|
while(wait != LP_WAIT(minor)) wait++;
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while(wait != LP_WAIT(minor)) wait++;
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/* control port takes strobe high */
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/* control port takes strobe high */
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outb_p(( LP_PSELECP | LP_PINITP | LP_PSTROBE ), ( LP_C( minor )));
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outb_p(( LP_PSELECP | LP_PINITP | LP_PSTROBE ), ( LP_C( minor )));
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/* Wait until NBUSY line goes high */
|
/* Wait until NBUSY line goes high */
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count = 0;
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count = 0;
|
do {
|
do {
|
status = LP_S(minor);
|
status = LP_S(minor);
|
count++;
|
count++;
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if (need_resched)
|
if (need_resched)
|
schedule();
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schedule();
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} while (LP_READY(minor, status) && (count<LP_CHAR(minor)));
|
} while (LP_READY(minor, status) && (count<LP_CHAR(minor)));
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/* take strobe low */
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/* take strobe low */
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outb_p(( LP_PSELECP | LP_PINITP ), ( LP_C( minor )));
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outb_p(( LP_PSELECP | LP_PINITP ), ( LP_C( minor )));
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/* update waittime statistics */
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/* update waittime statistics */
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if (count > stats->maxwait) {
|
if (count > stats->maxwait) {
|
#ifdef LP_DEBUG
|
#ifdef LP_DEBUG
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printk(KERN_DEBUG "lp%d success after %d counts.\n",minor,count);
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printk(KERN_DEBUG "lp%d success after %d counts.\n",minor,count);
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#endif
|
#endif
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stats->maxwait = count;
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stats->maxwait = count;
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}
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}
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count *= 256;
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count *= 256;
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wait = (count > stats->meanwait)? count - stats->meanwait :
|
wait = (count > stats->meanwait)? count - stats->meanwait :
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stats->meanwait - count;
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stats->meanwait - count;
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stats->meanwait = (255*stats->meanwait + count + 128) / 256;
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stats->meanwait = (255*stats->meanwait + count + 128) / 256;
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stats->mdev = ((127 * stats->mdev) + wait + 64) / 128;
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stats->mdev = ((127 * stats->mdev) + wait + 64) / 128;
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|
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return 1;
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return 1;
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}
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}
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|
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static inline int lp_char_interrupt(char lpchar, int minor)
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static inline int lp_char_interrupt(char lpchar, int minor)
|
{
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{
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int wait;
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int wait;
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unsigned long count = 0;
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unsigned long count = 0;
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unsigned char status;
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unsigned char status;
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struct lp_stats *stats;
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struct lp_stats *stats;
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|
|
do {
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do {
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if(need_resched)
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if(need_resched)
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schedule();
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schedule();
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if ((status = LP_S(minor)) & LP_PBUSY) {
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if ((status = LP_S(minor)) & LP_PBUSY) {
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if (!LP_CAREFUL_READY(minor, status))
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if (!LP_CAREFUL_READY(minor, status))
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return 0;
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return 0;
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outb_p(lpchar, LP_B(minor));
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outb_p(lpchar, LP_B(minor));
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stats = &LP_STAT(minor);
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stats = &LP_STAT(minor);
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stats->chars++;
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stats->chars++;
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/* must wait before taking strobe high, and after taking strobe
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/* must wait before taking strobe high, and after taking strobe
|
low, according spec. Some printers need it, others don't. */
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low, according spec. Some printers need it, others don't. */
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wait = 0;
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wait = 0;
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while(wait != LP_WAIT(minor)) wait++;
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while(wait != LP_WAIT(minor)) wait++;
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/* control port takes strobe high */
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/* control port takes strobe high */
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outb_p(( LP_PSELECP | LP_PINITP | LP_PSTROBE ), ( LP_C( minor )));
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outb_p(( LP_PSELECP | LP_PINITP | LP_PSTROBE ), ( LP_C( minor )));
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while(wait) wait--;
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while(wait) wait--;
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/* take strobe low */
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/* take strobe low */
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outb_p(( LP_PSELECP | LP_PINITP ), ( LP_C( minor )));
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outb_p(( LP_PSELECP | LP_PINITP ), ( LP_C( minor )));
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/* update waittime statistics */
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/* update waittime statistics */
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if (count) {
|
if (count) {
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if (count > stats->maxwait)
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if (count > stats->maxwait)
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stats->maxwait = count;
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stats->maxwait = count;
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count *= 256;
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count *= 256;
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wait = (count > stats->meanwait)? count - stats->meanwait :
|
wait = (count > stats->meanwait)? count - stats->meanwait :
|
stats->meanwait - count;
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stats->meanwait - count;
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stats->meanwait = (255*stats->meanwait + count + 128) / 256;
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stats->meanwait = (255*stats->meanwait + count + 128) / 256;
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stats->mdev = ((127 * stats->mdev) + wait + 64) / 128;
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stats->mdev = ((127 * stats->mdev) + wait + 64) / 128;
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}
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}
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return 1;
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return 1;
|
}
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}
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} while (count++ < LP_CHAR(minor));
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} while (count++ < LP_CHAR(minor));
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|
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return 0;
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return 0;
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}
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}
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static void lp_interrupt(int irq, void *dev_id, struct pt_regs *regs)
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static void lp_interrupt(int irq, void *dev_id, struct pt_regs *regs)
|
{
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{
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struct lp_struct *lp = &lp_table[0];
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struct lp_struct *lp = &lp_table[0];
|
|
|
while (irq != lp->irq) {
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while (irq != lp->irq) {
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if (++lp >= &lp_table[LP_NO])
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if (++lp >= &lp_table[LP_NO])
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return;
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return;
|
}
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}
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|
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wake_up(&lp->lp_wait_q);
|
wake_up(&lp->lp_wait_q);
|
}
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}
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|
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static inline int lp_write_interrupt(unsigned int minor, const char * buf, int count)
|
static inline int lp_write_interrupt(unsigned int minor, const char * buf, int count)
|
{
|
{
|
unsigned long copy_size;
|
unsigned long copy_size;
|
unsigned long total_bytes_written = 0;
|
unsigned long total_bytes_written = 0;
|
unsigned long bytes_written;
|
unsigned long bytes_written;
|
struct lp_struct *lp = &lp_table[minor];
|
struct lp_struct *lp = &lp_table[minor];
|
unsigned char status;
|
unsigned char status;
|
|
|
do {
|
do {
|
bytes_written = 0;
|
bytes_written = 0;
|
copy_size = (count <= LP_BUFFER_SIZE ? count : LP_BUFFER_SIZE);
|
copy_size = (count <= LP_BUFFER_SIZE ? count : LP_BUFFER_SIZE);
|
memcpy_fromfs(lp->lp_buffer, buf, copy_size);
|
memcpy_fromfs(lp->lp_buffer, buf, copy_size);
|
|
|
while (copy_size) {
|
while (copy_size) {
|
if (lp_char_interrupt(lp->lp_buffer[bytes_written], minor)) {
|
if (lp_char_interrupt(lp->lp_buffer[bytes_written], minor)) {
|
--copy_size;
|
--copy_size;
|
++bytes_written;
|
++bytes_written;
|
lp_table[minor].runchars++;
|
lp_table[minor].runchars++;
|
} else {
|
} else {
|
int rc = total_bytes_written + bytes_written;
|
int rc = total_bytes_written + bytes_written;
|
if (lp_table[minor].runchars > LP_STAT(minor).maxrun)
|
if (lp_table[minor].runchars > LP_STAT(minor).maxrun)
|
LP_STAT(minor).maxrun = lp_table[minor].runchars;
|
LP_STAT(minor).maxrun = lp_table[minor].runchars;
|
status = LP_S(minor);
|
status = LP_S(minor);
|
if ((status & LP_POUTPA)) {
|
if ((status & LP_POUTPA)) {
|
printk(KERN_INFO "lp%d out of paper\n", minor);
|
printk(KERN_INFO "lp%d out of paper\n", minor);
|
if (LP_F(minor) & LP_ABORT)
|
if (LP_F(minor) & LP_ABORT)
|
return rc?rc:-ENOSPC;
|
return rc?rc:-ENOSPC;
|
} else if (!(status & LP_PSELECD)) {
|
} else if (!(status & LP_PSELECD)) {
|
printk(KERN_INFO "lp%d off-line\n", minor);
|
printk(KERN_INFO "lp%d off-line\n", minor);
|
if (LP_F(minor) & LP_ABORT)
|
if (LP_F(minor) & LP_ABORT)
|
return rc?rc:-EIO;
|
return rc?rc:-EIO;
|
} else if (!(status & LP_PERRORP)) {
|
} else if (!(status & LP_PERRORP)) {
|
printk(KERN_ERR "lp%d printer error\n", minor);
|
printk(KERN_ERR "lp%d printer error\n", minor);
|
if (LP_F(minor) & LP_ABORT)
|
if (LP_F(minor) & LP_ABORT)
|
return rc?rc:-EIO;
|
return rc?rc:-EIO;
|
}
|
}
|
LP_STAT(minor).sleeps++;
|
LP_STAT(minor).sleeps++;
|
cli();
|
cli();
|
outb_p((LP_PSELECP|LP_PINITP|LP_PINTEN), (LP_C(minor)));
|
outb_p((LP_PSELECP|LP_PINITP|LP_PINTEN), (LP_C(minor)));
|
status = LP_S(minor);
|
status = LP_S(minor);
|
if ((!(status & LP_PACK) || (status & LP_PBUSY))
|
if ((!(status & LP_PACK) || (status & LP_PBUSY))
|
&& LP_CAREFUL_READY(minor, status)) {
|
&& LP_CAREFUL_READY(minor, status)) {
|
outb_p((LP_PSELECP|LP_PINITP), (LP_C(minor)));
|
outb_p((LP_PSELECP|LP_PINITP), (LP_C(minor)));
|
sti();
|
sti();
|
continue;
|
continue;
|
}
|
}
|
lp_table[minor].runchars=0;
|
lp_table[minor].runchars=0;
|
current->timeout = jiffies + LP_TIMEOUT_INTERRUPT;
|
current->timeout = jiffies + LP_TIMEOUT_INTERRUPT;
|
interruptible_sleep_on(&lp->lp_wait_q);
|
interruptible_sleep_on(&lp->lp_wait_q);
|
outb_p((LP_PSELECP|LP_PINITP), (LP_C(minor)));
|
outb_p((LP_PSELECP|LP_PINITP), (LP_C(minor)));
|
sti();
|
sti();
|
if (current->signal & ~current->blocked) {
|
if (current->signal & ~current->blocked) {
|
if (total_bytes_written + bytes_written)
|
if (total_bytes_written + bytes_written)
|
return total_bytes_written + bytes_written;
|
return total_bytes_written + bytes_written;
|
else
|
else
|
return -EINTR;
|
return -EINTR;
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
total_bytes_written += bytes_written;
|
total_bytes_written += bytes_written;
|
buf += bytes_written;
|
buf += bytes_written;
|
count -= bytes_written;
|
count -= bytes_written;
|
|
|
} while (count > 0);
|
} while (count > 0);
|
|
|
return total_bytes_written;
|
return total_bytes_written;
|
}
|
}
|
|
|
static inline int lp_write_polled(unsigned int minor, const char * buf, int count)
|
static inline int lp_write_polled(unsigned int minor, const char * buf, int count)
|
{
|
{
|
int retval,status;
|
int retval,status;
|
char c;
|
char c;
|
const char *temp;
|
const char *temp;
|
|
|
temp = buf;
|
temp = buf;
|
while (count > 0) {
|
while (count > 0) {
|
c = get_user(temp);
|
c = get_user(temp);
|
retval = lp_char_polled(c, minor);
|
retval = lp_char_polled(c, minor);
|
/* only update counting vars if character was printed */
|
/* only update counting vars if character was printed */
|
if (retval) {
|
if (retval) {
|
count--; temp++;
|
count--; temp++;
|
lp_table[minor].runchars++;
|
lp_table[minor].runchars++;
|
} else { /* if printer timed out */
|
} else { /* if printer timed out */
|
if (lp_table[minor].runchars > LP_STAT(minor).maxrun)
|
if (lp_table[minor].runchars > LP_STAT(minor).maxrun)
|
LP_STAT(minor).maxrun = lp_table[minor].runchars;
|
LP_STAT(minor).maxrun = lp_table[minor].runchars;
|
status = LP_S(minor);
|
status = LP_S(minor);
|
|
|
if (status & LP_POUTPA) {
|
if (status & LP_POUTPA) {
|
printk(KERN_INFO "lp%d out of paper\n", minor);
|
printk(KERN_INFO "lp%d out of paper\n", minor);
|
if(LP_F(minor) & LP_ABORT)
|
if(LP_F(minor) & LP_ABORT)
|
return temp-buf?temp-buf:-ENOSPC;
|
return temp-buf?temp-buf:-ENOSPC;
|
current->state = TASK_INTERRUPTIBLE;
|
current->state = TASK_INTERRUPTIBLE;
|
current->timeout = jiffies + LP_TIMEOUT_POLLED;
|
current->timeout = jiffies + LP_TIMEOUT_POLLED;
|
schedule();
|
schedule();
|
} else
|
} else
|
if (!(status & LP_PSELECD)) {
|
if (!(status & LP_PSELECD)) {
|
printk(KERN_INFO "lp%d off-line\n", minor);
|
printk(KERN_INFO "lp%d off-line\n", minor);
|
if(LP_F(minor) & LP_ABORT)
|
if(LP_F(minor) & LP_ABORT)
|
return temp-buf?temp-buf:-EIO;
|
return temp-buf?temp-buf:-EIO;
|
current->state = TASK_INTERRUPTIBLE;
|
current->state = TASK_INTERRUPTIBLE;
|
current->timeout = jiffies + LP_TIMEOUT_POLLED;
|
current->timeout = jiffies + LP_TIMEOUT_POLLED;
|
schedule();
|
schedule();
|
} else
|
} else
|
/* not offline or out of paper. on fire? */
|
/* not offline or out of paper. on fire? */
|
if (!(status & LP_PERRORP)) {
|
if (!(status & LP_PERRORP)) {
|
printk(KERN_ERR "lp%d reported invalid error status (on fire, eh?)\n", minor);
|
printk(KERN_ERR "lp%d reported invalid error status (on fire, eh?)\n", minor);
|
if(LP_F(minor) & LP_ABORT)
|
if(LP_F(minor) & LP_ABORT)
|
return temp-buf?temp-buf:-EIO;
|
return temp-buf?temp-buf:-EIO;
|
current->state = TASK_INTERRUPTIBLE;
|
current->state = TASK_INTERRUPTIBLE;
|
current->timeout = jiffies + LP_TIMEOUT_POLLED;
|
current->timeout = jiffies + LP_TIMEOUT_POLLED;
|
schedule();
|
schedule();
|
}
|
}
|
|
|
/* check for signals before going to sleep */
|
/* check for signals before going to sleep */
|
if (current->signal & ~current->blocked) {
|
if (current->signal & ~current->blocked) {
|
if (temp != buf)
|
if (temp != buf)
|
return temp-buf;
|
return temp-buf;
|
else
|
else
|
return -EINTR;
|
return -EINTR;
|
}
|
}
|
LP_STAT(minor).sleeps++;
|
LP_STAT(minor).sleeps++;
|
#ifdef LP_DEBUG
|
#ifdef LP_DEBUG
|
printk(KERN_DEBUG "lp%d sleeping at %d characters for %d jiffies\n",
|
printk(KERN_DEBUG "lp%d sleeping at %d characters for %d jiffies\n",
|
minor,lp_table[minor].runchars, LP_TIME(minor));
|
minor,lp_table[minor].runchars, LP_TIME(minor));
|
#endif
|
#endif
|
lp_table[minor].runchars=0;
|
lp_table[minor].runchars=0;
|
current->state = TASK_INTERRUPTIBLE;
|
current->state = TASK_INTERRUPTIBLE;
|
current->timeout = jiffies + LP_TIME(minor);
|
current->timeout = jiffies + LP_TIME(minor);
|
schedule();
|
schedule();
|
}
|
}
|
}
|
}
|
return temp-buf;
|
return temp-buf;
|
}
|
}
|
|
|
static int lp_write(struct inode * inode, struct file * file, const char * buf, int count)
|
static int lp_write(struct inode * inode, struct file * file, const char * buf, int count)
|
{
|
{
|
unsigned int minor = MINOR(inode->i_rdev);
|
unsigned int minor = MINOR(inode->i_rdev);
|
|
|
if (jiffies-lp_table[minor].lastcall > LP_TIME(minor))
|
if (jiffies-lp_table[minor].lastcall > LP_TIME(minor))
|
lp_table[minor].runchars = 0;
|
lp_table[minor].runchars = 0;
|
lp_table[minor].lastcall = jiffies;
|
lp_table[minor].lastcall = jiffies;
|
|
|
if (LP_IRQ(minor) != NO_IRQ)
|
if (LP_IRQ(minor) != NO_IRQ)
|
return lp_write_interrupt(minor, buf, count);
|
return lp_write_interrupt(minor, buf, count);
|
else
|
else
|
return lp_write_polled(minor, buf, count);
|
return lp_write_polled(minor, buf, count);
|
}
|
}
|
|
|
static int lp_lseek(struct inode * inode, struct file * file,
|
static int lp_lseek(struct inode * inode, struct file * file,
|
off_t offset, int origin)
|
off_t offset, int origin)
|
{
|
{
|
return -ESPIPE;
|
return -ESPIPE;
|
}
|
}
|
|
|
static int lp_open(struct inode * inode, struct file * file)
|
static int lp_open(struct inode * inode, struct file * file)
|
{
|
{
|
unsigned int minor = MINOR(inode->i_rdev);
|
unsigned int minor = MINOR(inode->i_rdev);
|
int ret;
|
int ret;
|
unsigned int irq;
|
unsigned int irq;
|
|
|
if (minor >= LP_NO)
|
if (minor >= LP_NO)
|
return -ENXIO;
|
return -ENXIO;
|
if ((LP_F(minor) & LP_EXIST) == 0)
|
if ((LP_F(minor) & LP_EXIST) == 0)
|
return -ENXIO;
|
return -ENXIO;
|
if (LP_F(minor) & LP_BUSY)
|
if (LP_F(minor) & LP_BUSY)
|
return -EBUSY;
|
return -EBUSY;
|
|
|
MOD_INC_USE_COUNT;
|
MOD_INC_USE_COUNT;
|
|
|
/* If ABORTOPEN is set and the printer is offline or out of paper,
|
/* If ABORTOPEN is set and the printer is offline or out of paper,
|
we may still want to open it to perform ioctl()s. Therefore we
|
we may still want to open it to perform ioctl()s. Therefore we
|
have commandeered O_NONBLOCK, even though it is being used in
|
have commandeered O_NONBLOCK, even though it is being used in
|
a non-standard manner. This is strictly a Linux hack, and
|
a non-standard manner. This is strictly a Linux hack, and
|
should most likely only ever be used by the tunelp application. */
|
should most likely only ever be used by the tunelp application. */
|
if ((LP_F(minor) & LP_ABORTOPEN) && !(file->f_flags & O_NONBLOCK)) {
|
if ((LP_F(minor) & LP_ABORTOPEN) && !(file->f_flags & O_NONBLOCK)) {
|
int status = LP_S(minor);
|
int status = LP_S(minor);
|
if (status & LP_POUTPA) {
|
if (status & LP_POUTPA) {
|
printk(KERN_INFO "lp%d out of paper\n", minor);
|
printk(KERN_INFO "lp%d out of paper\n", minor);
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
return -ENOSPC;
|
return -ENOSPC;
|
} else if (!(status & LP_PSELECD)) {
|
} else if (!(status & LP_PSELECD)) {
|
printk(KERN_INFO "lp%d off-line\n", minor);
|
printk(KERN_INFO "lp%d off-line\n", minor);
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
return -EIO;
|
return -EIO;
|
} else if (!(status & LP_PERRORP)) {
|
} else if (!(status & LP_PERRORP)) {
|
printk(KERN_ERR "lp%d printer error\n", minor);
|
printk(KERN_ERR "lp%d printer error\n", minor);
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
return -EIO;
|
return -EIO;
|
}
|
}
|
}
|
}
|
|
|
if ((irq = LP_IRQ(minor)) != NO_IRQ) {
|
if ((irq = LP_IRQ(minor)) != NO_IRQ) {
|
lp_table[minor].lp_buffer = (char *) kmalloc(LP_BUFFER_SIZE, GFP_KERNEL);
|
lp_table[minor].lp_buffer = (char *) kmalloc(LP_BUFFER_SIZE, GFP_KERNEL);
|
if (!lp_table[minor].lp_buffer) {
|
if (!lp_table[minor].lp_buffer) {
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
return -ENOMEM;
|
return -ENOMEM;
|
}
|
}
|
|
|
ret = request_irq(irq, lp_interrupt, SA_INTERRUPT, "printer", NULL);
|
ret = request_irq(irq, lp_interrupt, SA_INTERRUPT, "printer", NULL);
|
if (ret) {
|
if (ret) {
|
kfree_s(lp_table[minor].lp_buffer, LP_BUFFER_SIZE);
|
kfree_s(lp_table[minor].lp_buffer, LP_BUFFER_SIZE);
|
lp_table[minor].lp_buffer = NULL;
|
lp_table[minor].lp_buffer = NULL;
|
printk("lp%d unable to use interrupt %d, error %d\n", minor, irq, ret);
|
printk("lp%d unable to use interrupt %d, error %d\n", minor, irq, ret);
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
return ret;
|
return ret;
|
}
|
}
|
}
|
}
|
|
|
LP_F(minor) |= LP_BUSY;
|
LP_F(minor) |= LP_BUSY;
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static void lp_release(struct inode * inode, struct file * file)
|
static void lp_release(struct inode * inode, struct file * file)
|
{
|
{
|
unsigned int minor = MINOR(inode->i_rdev);
|
unsigned int minor = MINOR(inode->i_rdev);
|
unsigned int irq;
|
unsigned int irq;
|
|
|
if ((irq = LP_IRQ(minor)) != NO_IRQ) {
|
if ((irq = LP_IRQ(minor)) != NO_IRQ) {
|
free_irq(irq, NULL);
|
free_irq(irq, NULL);
|
kfree_s(lp_table[minor].lp_buffer, LP_BUFFER_SIZE);
|
kfree_s(lp_table[minor].lp_buffer, LP_BUFFER_SIZE);
|
lp_table[minor].lp_buffer = NULL;
|
lp_table[minor].lp_buffer = NULL;
|
}
|
}
|
|
|
LP_F(minor) &= ~LP_BUSY;
|
LP_F(minor) &= ~LP_BUSY;
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
}
|
}
|
|
|
|
|
static int lp_ioctl(struct inode *inode, struct file *file,
|
static int lp_ioctl(struct inode *inode, struct file *file,
|
unsigned int cmd, unsigned long arg)
|
unsigned int cmd, unsigned long arg)
|
{
|
{
|
unsigned int minor = MINOR(inode->i_rdev);
|
unsigned int minor = MINOR(inode->i_rdev);
|
int retval = 0;
|
int retval = 0;
|
|
|
#ifdef LP_DEBUG
|
#ifdef LP_DEBUG
|
printk(KERN_DEBUG "lp%d ioctl, cmd: 0x%x, arg: 0x%x\n", minor, cmd, arg);
|
printk(KERN_DEBUG "lp%d ioctl, cmd: 0x%x, arg: 0x%x\n", minor, cmd, arg);
|
#endif
|
#endif
|
if (minor >= LP_NO)
|
if (minor >= LP_NO)
|
return -ENODEV;
|
return -ENODEV;
|
if ((LP_F(minor) & LP_EXIST) == 0)
|
if ((LP_F(minor) & LP_EXIST) == 0)
|
return -ENODEV;
|
return -ENODEV;
|
switch ( cmd ) {
|
switch ( cmd ) {
|
case LPTIME:
|
case LPTIME:
|
LP_TIME(minor) = arg * HZ/100;
|
LP_TIME(minor) = arg * HZ/100;
|
break;
|
break;
|
case LPCHAR:
|
case LPCHAR:
|
LP_CHAR(minor) = arg;
|
LP_CHAR(minor) = arg;
|
break;
|
break;
|
case LPABORT:
|
case LPABORT:
|
if (arg)
|
if (arg)
|
LP_F(minor) |= LP_ABORT;
|
LP_F(minor) |= LP_ABORT;
|
else
|
else
|
LP_F(minor) &= ~LP_ABORT;
|
LP_F(minor) &= ~LP_ABORT;
|
break;
|
break;
|
case LPABORTOPEN:
|
case LPABORTOPEN:
|
if (arg)
|
if (arg)
|
LP_F(minor) |= LP_ABORTOPEN;
|
LP_F(minor) |= LP_ABORTOPEN;
|
else
|
else
|
LP_F(minor) &= ~LP_ABORTOPEN;
|
LP_F(minor) &= ~LP_ABORTOPEN;
|
break;
|
break;
|
case LPCAREFUL:
|
case LPCAREFUL:
|
if (arg)
|
if (arg)
|
LP_F(minor) |= LP_CAREFUL;
|
LP_F(minor) |= LP_CAREFUL;
|
else
|
else
|
LP_F(minor) &= ~LP_CAREFUL;
|
LP_F(minor) &= ~LP_CAREFUL;
|
break;
|
break;
|
case LPWAIT:
|
case LPWAIT:
|
LP_WAIT(minor) = arg;
|
LP_WAIT(minor) = arg;
|
break;
|
break;
|
case LPSETIRQ: {
|
case LPSETIRQ: {
|
int oldirq;
|
int oldirq;
|
int newirq = arg;
|
int newirq = arg;
|
struct lp_struct *lp = &lp_table[minor];
|
struct lp_struct *lp = &lp_table[minor];
|
|
|
if (!suser())
|
if (!suser())
|
return -EPERM;
|
return -EPERM;
|
|
|
oldirq = LP_IRQ(minor);
|
oldirq = LP_IRQ(minor);
|
|
|
/* Allocate buffer now if we are going to need it */
|
/* Allocate buffer now if we are going to need it */
|
if (oldirq == NO_IRQ && newirq != NO_IRQ) {
|
if (oldirq == NO_IRQ && newirq != NO_IRQ) {
|
lp->lp_buffer = (char *) kmalloc(LP_BUFFER_SIZE, GFP_KERNEL);
|
lp->lp_buffer = (char *) kmalloc(LP_BUFFER_SIZE, GFP_KERNEL);
|
if (!lp->lp_buffer)
|
if (!lp->lp_buffer)
|
return -ENOMEM;
|
return -ENOMEM;
|
}
|
}
|
|
|
if (oldirq != NO_IRQ) {
|
if (oldirq != NO_IRQ) {
|
free_irq(oldirq, NULL);
|
free_irq(oldirq, NULL);
|
}
|
}
|
if (newirq != NO_IRQ) {
|
if (newirq != NO_IRQ) {
|
/* Install new irq */
|
/* Install new irq */
|
if ((retval = request_irq(newirq, lp_interrupt, SA_INTERRUPT, "printer", NULL))) {
|
if ((retval = request_irq(newirq, lp_interrupt, SA_INTERRUPT, "printer", NULL))) {
|
if (oldirq != NO_IRQ) {
|
if (oldirq != NO_IRQ) {
|
/* restore old irq */
|
/* restore old irq */
|
request_irq(oldirq, lp_interrupt, SA_INTERRUPT, "printer", NULL);
|
request_irq(oldirq, lp_interrupt, SA_INTERRUPT, "printer", NULL);
|
} else {
|
} else {
|
/* We don't need the buffer */
|
/* We don't need the buffer */
|
kfree_s(lp->lp_buffer, LP_BUFFER_SIZE);
|
kfree_s(lp->lp_buffer, LP_BUFFER_SIZE);
|
lp->lp_buffer = NULL;
|
lp->lp_buffer = NULL;
|
}
|
}
|
return retval;
|
return retval;
|
}
|
}
|
}
|
}
|
if (oldirq != NO_IRQ && newirq == NO_IRQ) {
|
if (oldirq != NO_IRQ && newirq == NO_IRQ) {
|
/* We don't need the buffer */
|
/* We don't need the buffer */
|
kfree_s(lp->lp_buffer, LP_BUFFER_SIZE);
|
kfree_s(lp->lp_buffer, LP_BUFFER_SIZE);
|
lp->lp_buffer = NULL;
|
lp->lp_buffer = NULL;
|
}
|
}
|
LP_IRQ(minor) = newirq;
|
LP_IRQ(minor) = newirq;
|
lp_reset(minor);
|
lp_reset(minor);
|
break;
|
break;
|
}
|
}
|
case LPGETIRQ:
|
case LPGETIRQ:
|
retval = verify_area(VERIFY_WRITE, (void *) arg,
|
retval = verify_area(VERIFY_WRITE, (void *) arg,
|
sizeof(int));
|
sizeof(int));
|
if (retval)
|
if (retval)
|
return retval;
|
return retval;
|
memcpy_tofs((int *) arg, &LP_IRQ(minor), sizeof(int));
|
memcpy_tofs((int *) arg, &LP_IRQ(minor), sizeof(int));
|
break;
|
break;
|
case LPGETSTATUS:
|
case LPGETSTATUS:
|
retval = verify_area(VERIFY_WRITE, (void *) arg,
|
retval = verify_area(VERIFY_WRITE, (void *) arg,
|
sizeof(int));
|
sizeof(int));
|
if (retval)
|
if (retval)
|
return retval;
|
return retval;
|
else {
|
else {
|
int status = LP_S(minor);
|
int status = LP_S(minor);
|
memcpy_tofs((int *) arg, &status, sizeof(int));
|
memcpy_tofs((int *) arg, &status, sizeof(int));
|
}
|
}
|
break;
|
break;
|
case LPRESET:
|
case LPRESET:
|
lp_reset(minor);
|
lp_reset(minor);
|
break;
|
break;
|
case LPGETSTATS:
|
case LPGETSTATS:
|
retval = verify_area(VERIFY_WRITE, (void *) arg,
|
retval = verify_area(VERIFY_WRITE, (void *) arg,
|
sizeof(struct lp_stats));
|
sizeof(struct lp_stats));
|
if (retval)
|
if (retval)
|
return retval;
|
return retval;
|
else {
|
else {
|
memcpy_tofs((int *) arg, &LP_STAT(minor), sizeof(struct lp_stats));
|
memcpy_tofs((int *) arg, &LP_STAT(minor), sizeof(struct lp_stats));
|
if (suser())
|
if (suser())
|
memset(&LP_STAT(minor), 0, sizeof(struct lp_stats));
|
memset(&LP_STAT(minor), 0, sizeof(struct lp_stats));
|
}
|
}
|
break;
|
break;
|
case LPGETFLAGS:
|
case LPGETFLAGS:
|
retval = verify_area(VERIFY_WRITE, (void *) arg,
|
retval = verify_area(VERIFY_WRITE, (void *) arg,
|
sizeof(int));
|
sizeof(int));
|
if (retval)
|
if (retval)
|
return retval;
|
return retval;
|
else {
|
else {
|
int status = LP_F(minor);
|
int status = LP_F(minor);
|
memcpy_tofs((int *) arg, &status, sizeof(int));
|
memcpy_tofs((int *) arg, &status, sizeof(int));
|
}
|
}
|
break;
|
break;
|
default:
|
default:
|
retval = -EINVAL;
|
retval = -EINVAL;
|
}
|
}
|
return retval;
|
return retval;
|
}
|
}
|
|
|
|
|
static struct file_operations lp_fops = {
|
static struct file_operations lp_fops = {
|
lp_lseek,
|
lp_lseek,
|
NULL, /* lp_read */
|
NULL, /* lp_read */
|
lp_write,
|
lp_write,
|
NULL, /* lp_readdir */
|
NULL, /* lp_readdir */
|
NULL, /* lp_select */
|
NULL, /* lp_select */
|
lp_ioctl,
|
lp_ioctl,
|
NULL, /* lp_mmap */
|
NULL, /* lp_mmap */
|
lp_open,
|
lp_open,
|
lp_release
|
lp_release
|
};
|
};
|
|
|
static int lp_probe(int offset)
|
static int lp_probe(int offset)
|
{
|
{
|
int base, size;
|
int base, size;
|
unsigned int testvalue;
|
unsigned int testvalue;
|
|
|
base = LP_B(offset);
|
base = LP_B(offset);
|
if (base == 0)
|
if (base == 0)
|
return -1; /* de-configured by command line */
|
return -1; /* de-configured by command line */
|
if (LP_IRQ(offset) != NO_IRQ && LP_IRQ(offset) > 15)
|
if (LP_IRQ(offset) != NO_IRQ && LP_IRQ(offset) > 15)
|
return -1; /* bogus interrupt value */
|
return -1; /* bogus interrupt value */
|
size = (base == 0x3bc)? 3 : 8;
|
size = (base == 0x3bc)? 3 : 8;
|
if (check_region(base, size) < 0)
|
if (check_region(base, size) < 0)
|
return -1;
|
return -1;
|
/* write to port & read back to check */
|
/* write to port & read back to check */
|
outb_p(LP_DUMMY, base);
|
outb_p(LP_DUMMY, base);
|
udelay(LP_DELAY);
|
udelay(LP_DELAY);
|
testvalue = inb_p(base);
|
testvalue = inb_p(base);
|
if (testvalue == LP_DUMMY) {
|
if (testvalue == LP_DUMMY) {
|
LP_F(offset) |= LP_EXIST;
|
LP_F(offset) |= LP_EXIST;
|
lp_reset(offset);
|
lp_reset(offset);
|
printk(KERN_INFO "lp%d at 0x%04x, ", offset, base);
|
printk(KERN_INFO "lp%d at 0x%04x, ", offset, base);
|
request_region(base, size, "lp");
|
request_region(base, size, "lp");
|
if (LP_IRQ(offset) != NO_IRQ)
|
if (LP_IRQ(offset) != NO_IRQ)
|
printk("(irq = %d)\n", LP_IRQ(offset));
|
printk("(irq = %d)\n", LP_IRQ(offset));
|
else
|
else
|
printk("(polling)\n");
|
printk("(polling)\n");
|
return 1;
|
return 1;
|
} else
|
} else
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* Command line parameters:
|
/* Command line parameters:
|
|
|
When the lp driver is built in to the kernel, you may use the
|
When the lp driver is built in to the kernel, you may use the
|
LILO/LOADLIN command line to set the port addresses and interrupts
|
LILO/LOADLIN command line to set the port addresses and interrupts
|
that the driver will use.
|
that the driver will use.
|
|
|
Syntax: lp=port0[,irq0[,port1[,irq1[,port2[,irq2]]]]]
|
Syntax: lp=port0[,irq0[,port1[,irq1[,port2[,irq2]]]]]
|
|
|
For example: lp=0x378,0 or lp=0x278,5,0x378,7
|
For example: lp=0x378,0 or lp=0x278,5,0x378,7
|
|
|
Note that if this feature is used, you must specify *all* the ports
|
Note that if this feature is used, you must specify *all* the ports
|
you want considered, there are no defaults. You can disable a
|
you want considered, there are no defaults. You can disable a
|
built-in driver with lp=0 .
|
built-in driver with lp=0 .
|
|
|
*/
|
*/
|
|
|
void lp_setup(char *str, int *ints)
|
void lp_setup(char *str, int *ints)
|
|
|
{
|
{
|
LP_B(0) = ((ints[0] > 0) ? ints[1] : 0 );
|
LP_B(0) = ((ints[0] > 0) ? ints[1] : 0 );
|
LP_IRQ(0) = ((ints[0] > 1) ? ints[2] : NO_IRQ );
|
LP_IRQ(0) = ((ints[0] > 1) ? ints[2] : NO_IRQ );
|
LP_B(1) = ((ints[0] > 2) ? ints[3] : 0 );
|
LP_B(1) = ((ints[0] > 2) ? ints[3] : 0 );
|
LP_IRQ(1) = ((ints[0] > 3) ? ints[4] : NO_IRQ );
|
LP_IRQ(1) = ((ints[0] > 3) ? ints[4] : NO_IRQ );
|
LP_B(2) = ((ints[0] > 4) ? ints[5] : 0 );
|
LP_B(2) = ((ints[0] > 4) ? ints[5] : 0 );
|
LP_IRQ(2) = ((ints[0] > 5) ? ints[6] : NO_IRQ );
|
LP_IRQ(2) = ((ints[0] > 5) ? ints[6] : NO_IRQ );
|
}
|
}
|
|
|
#ifdef MODULE
|
#ifdef MODULE
|
static int io[] = {0, 0, 0};
|
static int io[] = {0, 0, 0};
|
static int irq[] = {NO_IRQ, NO_IRQ, NO_IRQ};
|
static int irq[] = {NO_IRQ, NO_IRQ, NO_IRQ};
|
|
|
#define lp_init init_module
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#define lp_init init_module
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#endif
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#endif
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int lp_init(void)
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int lp_init(void)
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{
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{
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int offset = 0;
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int offset = 0;
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int count = 0;
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int count = 0;
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#ifdef MODULE
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#ifdef MODULE
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int failed = 0;
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int failed = 0;
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#endif
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#endif
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if (register_chrdev(LP_MAJOR,"lp",&lp_fops)) {
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if (register_chrdev(LP_MAJOR,"lp",&lp_fops)) {
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printk("lp: unable to get major %d\n", LP_MAJOR);
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printk("lp: unable to get major %d\n", LP_MAJOR);
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return -EIO;
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return -EIO;
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}
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}
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#ifdef MODULE
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#ifdef MODULE
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/* When user feeds parameters, use them */
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/* When user feeds parameters, use them */
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for (offset=0; offset < LP_NO; offset++) {
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for (offset=0; offset < LP_NO; offset++) {
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int specified=0;
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int specified=0;
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if (io[offset] != 0) {
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if (io[offset] != 0) {
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LP_B(offset) = io[offset];
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LP_B(offset) = io[offset];
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specified++;
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specified++;
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}
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}
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if (irq[offset] != NO_IRQ) {
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if (irq[offset] != NO_IRQ) {
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LP_IRQ(offset) = irq[offset];
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LP_IRQ(offset) = irq[offset];
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specified++;
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specified++;
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}
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}
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if (specified) {
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if (specified) {
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if (lp_probe(offset) <= 0) {
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if (lp_probe(offset) <= 0) {
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printk(KERN_INFO "lp%d: Not found\n", offset);
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printk(KERN_INFO "lp%d: Not found\n", offset);
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failed++;
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failed++;
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} else
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} else
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count++;
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count++;
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}
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}
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}
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}
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/* Successful specified devices increase count
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/* Successful specified devices increase count
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* Unsuccessful specified devices increase failed
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* Unsuccessful specified devices increase failed
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*/
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*/
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if (count)
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if (count)
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return 0;
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return 0;
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if (failed) {
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if (failed) {
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printk(KERN_INFO "lp: No override devices found.\n");
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printk(KERN_INFO "lp: No override devices found.\n");
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unregister_chrdev(LP_MAJOR,"lp");
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unregister_chrdev(LP_MAJOR,"lp");
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return -EIO;
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return -EIO;
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}
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}
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/* Only get here if there were no specified devices. To continue
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/* Only get here if there were no specified devices. To continue
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* would be silly since the above code has scribbled all over the
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* would be silly since the above code has scribbled all over the
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* probe list.
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* probe list.
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*/
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*/
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#endif
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#endif
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/* take on all known port values */
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/* take on all known port values */
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for (offset = 0; offset < LP_NO; offset++) {
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for (offset = 0; offset < LP_NO; offset++) {
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int ret = lp_probe(offset);
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int ret = lp_probe(offset);
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if (ret < 0)
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if (ret < 0)
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continue;
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continue;
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count += ret;
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count += ret;
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}
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}
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if (count == 0)
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if (count == 0)
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printk("lp: Driver configured but no interfaces found.\n");
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printk("lp: Driver configured but no interfaces found.\n");
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|
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return 0;
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return 0;
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}
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}
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#ifdef MODULE
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#ifdef MODULE
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void cleanup_module(void)
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void cleanup_module(void)
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{
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{
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int offset;
|
int offset;
|
|
|
unregister_chrdev(LP_MAJOR,"lp");
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unregister_chrdev(LP_MAJOR,"lp");
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for (offset = 0; offset < LP_NO; offset++) {
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for (offset = 0; offset < LP_NO; offset++) {
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int base, size;
|
int base, size;
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base = LP_B(offset);
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base = LP_B(offset);
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size = (base == 0x3bc)? 3 : 8;
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size = (base == 0x3bc)? 3 : 8;
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if (LP_F(offset) & LP_EXIST)
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if (LP_F(offset) & LP_EXIST)
|
release_region(LP_B(offset),size);
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release_region(LP_B(offset),size);
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}
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}
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}
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}
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#endif
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#endif
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