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cm4000_cs: use bitrev 

Cleanup using bitrev8 in cm4000_cs driver.

Cc: Harald Welte <laforge@gnumonks.org>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Akinobu Mita 2007-05-09 02:33:32 -07:00 committed by Linus Torvalds
parent 54493c1006
commit 884c3d7510
2 changed files with 7 additions and 29 deletions
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1
drivers/char/pcmcia/Kconfig
View File

@ -21,6 +21,7 @@ config SYNCLINK_CS
config CARDMAN_4000
tristate "Omnikey Cardman 4000 support"
depends on PCMCIA
select BITREVERSE
help
Enable support for the Omnikey Cardman 4000 PCMCIA Smartcard
reader.

35
drivers/char/pcmcia/cm4000_cs.c
View File

@ -31,6 +31,7 @@
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/delay.h>
#include <linux/bitrev.h>
#include <asm/uaccess.h>
#include <asm/io.h>
@ -194,41 +195,17 @@ static inline unsigned char xinb(unsigned short port)
}
#endif
#define b_0000 15
#define b_0001 14
#define b_0010 13
#define b_0011 12
#define b_0100 11
#define b_0101 10
#define b_0110 9
#define b_0111 8
#define b_1000 7
#define b_1001 6
#define b_1010 5
#define b_1011 4
#define b_1100 3
#define b_1101 2
#define b_1110 1
#define b_1111 0
static unsigned char irtab[16] = {
b_0000, b_1000, b_0100, b_1100,
b_0010, b_1010, b_0110, b_1110,
b_0001, b_1001, b_0101, b_1101,
b_0011, b_1011, b_0111, b_1111
};
static inline unsigned char invert_revert(unsigned char ch)
{
return bitrev8(~ch);
}
static void str_invert_revert(unsigned char *b, int len)
{
int i;
for (i = 0; i < len; i++)
b[i] = (irtab[b[i] & 0x0f] << 4) | irtab[b[i] >> 4];
}
static unsigned char invert_revert(unsigned char ch)
{
return (irtab[ch & 0x0f] << 4) | irtab[ch >> 4];
b[i] = invert_revert(b[i]);
}
#define ATRLENCK(dev,pos) \