2005-04-17 05:20:36 +07:00
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/*
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* Copyright (c) 1996-2001 Vojtech Pavlik
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*/
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/*
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* This is just a very simple driver that can dump the data
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* out of the joystick port into the syslog ...
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*/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/module.h>
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#include <linux/gameport.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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2005-10-31 06:03:48 +07:00
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#include <linux/slab.h>
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2005-04-17 05:20:36 +07:00
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#define DRIVER_DESC "Gameport data dumper module"
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MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL");
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#define BUF_SIZE 256
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struct joydump {
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unsigned int time;
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unsigned char data;
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};
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static int joydump_connect(struct gameport *gameport, struct gameport_driver *drv)
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{
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struct joydump *buf; /* all entries */
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struct joydump *dump, *prev; /* one entry each */
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int axes[4], buttons;
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int i, j, t, timeout;
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unsigned long flags;
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unsigned char u;
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printk(KERN_INFO "joydump: ,------------------ START ----------------.\n");
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printk(KERN_INFO "joydump: | Dumping: %30s |\n", gameport->phys);
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printk(KERN_INFO "joydump: | Speed: %28d kHz |\n", gameport->speed);
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if (gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) {
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printk(KERN_INFO "joydump: | Raw mode not available - trying cooked. |\n");
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if (gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) {
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printk(KERN_INFO "joydump: | Cooked not available either. Failing. |\n");
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printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
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return -ENODEV;
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}
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gameport_cooked_read(gameport, axes, &buttons);
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for (i = 0; i < 4; i++)
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printk(KERN_INFO "joydump: | Axis %d: %4d. |\n", i, axes[i]);
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printk(KERN_INFO "joydump: | Buttons %02x. |\n", buttons);
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printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
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}
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timeout = gameport_time(gameport, 10000); /* 10 ms */
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treewide: kmalloc() -> kmalloc_array()
The kmalloc() function has a 2-factor argument form, kmalloc_array(). This
patch replaces cases of:
kmalloc(a * b, gfp)
with:
kmalloc_array(a * b, gfp)
as well as handling cases of:
kmalloc(a * b * c, gfp)
with:
kmalloc(array3_size(a, b, c), gfp)
as it's slightly less ugly than:
kmalloc_array(array_size(a, b), c, gfp)
This does, however, attempt to ignore constant size factors like:
kmalloc(4 * 1024, gfp)
though any constants defined via macros get caught up in the conversion.
Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.
The tools/ directory was manually excluded, since it has its own
implementation of kmalloc().
The Coccinelle script used for this was:
// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@
(
kmalloc(
- (sizeof(TYPE)) * E
+ sizeof(TYPE) * E
, ...)
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kmalloc(
- (sizeof(THING)) * E
+ sizeof(THING) * E
, ...)
)
// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@
(
kmalloc(
- sizeof(u8) * (COUNT)
+ COUNT
, ...)
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kmalloc(
- sizeof(__u8) * (COUNT)
+ COUNT
, ...)
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kmalloc(
- sizeof(char) * (COUNT)
+ COUNT
, ...)
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kmalloc(
- sizeof(unsigned char) * (COUNT)
+ COUNT
, ...)
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kmalloc(
- sizeof(u8) * COUNT
+ COUNT
, ...)
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kmalloc(
- sizeof(__u8) * COUNT
+ COUNT
, ...)
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kmalloc(
- sizeof(char) * COUNT
+ COUNT
, ...)
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kmalloc(
- sizeof(unsigned char) * COUNT
+ COUNT
, ...)
)
// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@
(
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * (COUNT_ID)
+ COUNT_ID, sizeof(TYPE)
, ...)
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- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * COUNT_ID
+ COUNT_ID, sizeof(TYPE)
, ...)
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- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * (COUNT_CONST)
+ COUNT_CONST, sizeof(TYPE)
, ...)
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- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * COUNT_CONST
+ COUNT_CONST, sizeof(TYPE)
, ...)
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- kmalloc
+ kmalloc_array
(
- sizeof(THING) * (COUNT_ID)
+ COUNT_ID, sizeof(THING)
, ...)
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- kmalloc
+ kmalloc_array
(
- sizeof(THING) * COUNT_ID
+ COUNT_ID, sizeof(THING)
, ...)
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- kmalloc
+ kmalloc_array
(
- sizeof(THING) * (COUNT_CONST)
+ COUNT_CONST, sizeof(THING)
, ...)
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- kmalloc
+ kmalloc_array
(
- sizeof(THING) * COUNT_CONST
+ COUNT_CONST, sizeof(THING)
, ...)
)
// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@
- kmalloc
+ kmalloc_array
(
- SIZE * COUNT
+ COUNT, SIZE
, ...)
// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@
(
kmalloc(
- sizeof(TYPE) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
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kmalloc(
- sizeof(TYPE) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
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kmalloc(
- sizeof(TYPE) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
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kmalloc(
- sizeof(TYPE) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
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kmalloc(
- sizeof(THING) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
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kmalloc(
- sizeof(THING) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
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kmalloc(
- sizeof(THING) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
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kmalloc(
- sizeof(THING) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
)
// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@
(
kmalloc(
- sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
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kmalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
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kmalloc(
- sizeof(THING1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kmalloc(
- sizeof(THING1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
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kmalloc(
- sizeof(TYPE1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
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kmalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
)
// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@
(
kmalloc(
- (COUNT) * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
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kmalloc(
- COUNT * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- COUNT * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
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kmalloc(
- (COUNT) * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- COUNT * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
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kmalloc(
- (COUNT) * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
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kmalloc(
- (COUNT) * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
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kmalloc(
- COUNT * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
)
// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@
(
kmalloc(C1 * C2 * C3, ...)
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kmalloc(
- (E1) * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
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kmalloc(
- (E1) * (E2) * E3
+ array3_size(E1, E2, E3)
, ...)
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kmalloc(
- (E1) * (E2) * (E3)
+ array3_size(E1, E2, E3)
, ...)
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kmalloc(
- E1 * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
)
// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@
(
kmalloc(sizeof(THING) * C2, ...)
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kmalloc(sizeof(TYPE) * C2, ...)
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kmalloc(C1 * C2 * C3, ...)
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kmalloc(C1 * C2, ...)
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- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * (E2)
+ E2, sizeof(TYPE)
, ...)
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- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * E2
+ E2, sizeof(TYPE)
, ...)
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- kmalloc
+ kmalloc_array
(
- sizeof(THING) * (E2)
+ E2, sizeof(THING)
, ...)
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- kmalloc
+ kmalloc_array
(
- sizeof(THING) * E2
+ E2, sizeof(THING)
, ...)
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- kmalloc
+ kmalloc_array
(
- (E1) * E2
+ E1, E2
, ...)
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- kmalloc
+ kmalloc_array
(
- (E1) * (E2)
+ E1, E2
, ...)
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- kmalloc
+ kmalloc_array
(
- E1 * E2
+ E1, E2
, ...)
)
Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-13 03:55:00 +07:00
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buf = kmalloc_array(BUF_SIZE, sizeof(struct joydump), GFP_KERNEL);
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2005-04-17 05:20:36 +07:00
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if (!buf) {
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printk(KERN_INFO "joydump: no memory for testing\n");
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goto jd_end;
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}
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dump = buf;
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t = 0;
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i = 1;
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local_irq_save(flags);
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u = gameport_read(gameport);
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dump->data = u;
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dump->time = t;
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dump++;
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gameport_trigger(gameport);
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while (i < BUF_SIZE && t < timeout) {
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dump->data = gameport_read(gameport);
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if (dump->data ^ u) {
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u = dump->data;
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dump->time = t;
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i++;
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dump++;
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}
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t++;
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}
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local_irq_restore(flags);
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/*
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* Dump data.
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*/
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t = i;
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dump = buf;
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prev = dump;
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printk(KERN_INFO "joydump: >------------------ DATA -----------------<\n");
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printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ", 0, 0);
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for (j = 7; j >= 0; j--)
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printk("%d", (dump->data >> j) & 1);
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printk(" |\n");
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dump++;
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for (i = 1; i < t; i++, dump++, prev++) {
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printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ",
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i, dump->time - prev->time);
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for (j = 7; j >= 0; j--)
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printk("%d", (dump->data >> j) & 1);
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printk(" |\n");
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}
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kfree(buf);
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jd_end:
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printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
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return 0;
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}
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static void joydump_disconnect(struct gameport *gameport)
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{
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gameport_close(gameport);
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}
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static struct gameport_driver joydump_drv = {
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.driver = {
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.name = "joydump",
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},
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.description = DRIVER_DESC,
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.connect = joydump_connect,
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.disconnect = joydump_disconnect,
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};
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2012-04-04 13:52:27 +07:00
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module_gameport_driver(joydump_drv);
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