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-rw-r--r--drivers/char/pcmcia/Kconfig1
-rw-r--r--drivers/char/pcmcia/cm4000_cs.c35
2 files changed, 7 insertions, 29 deletions
diff --git a/drivers/char/pcmcia/Kconfig b/drivers/char/pcmcia/Kconfig
index 27c1179ee527..f25facd97bb4 100644
--- a/drivers/char/pcmcia/Kconfig
+++ b/drivers/char/pcmcia/Kconfig
@@ -21,6 +21,7 @@ config SYNCLINK_CS
21config CARDMAN_4000 21config CARDMAN_4000
22 tristate "Omnikey Cardman 4000 support" 22 tristate "Omnikey Cardman 4000 support"
23 depends on PCMCIA 23 depends on PCMCIA
24 select BITREVERSE
24 help 25 help
25 Enable support for the Omnikey Cardman 4000 PCMCIA Smartcard 26 Enable support for the Omnikey Cardman 4000 PCMCIA Smartcard
26 reader. 27 reader.
diff --git a/drivers/char/pcmcia/cm4000_cs.c b/drivers/char/pcmcia/cm4000_cs.c
index 8cbc64fe0feb..561d0e151d0f 100644
--- a/drivers/char/pcmcia/cm4000_cs.c
+++ b/drivers/char/pcmcia/cm4000_cs.c
@@ -31,6 +31,7 @@
31#include <linux/init.h> 31#include <linux/init.h>
32#include <linux/fs.h> 32#include <linux/fs.h>
33#include <linux/delay.h> 33#include <linux/delay.h>
34#include <linux/bitrev.h>
34#include <asm/uaccess.h> 35#include <asm/uaccess.h>
35#include <asm/io.h> 36#include <asm/io.h>
36 37
@@ -194,41 +195,17 @@ static inline unsigned char xinb(unsigned short port)
194} 195}
195#endif 196#endif
196 197
197#define b_0000 15 198static inline unsigned char invert_revert(unsigned char ch)
198#define b_0001 14 199{
199#define b_0010 13 200 return bitrev8(~ch);
200#define b_0011 12 201}
201#define b_0100 11
202#define b_0101 10
203#define b_0110 9
204#define b_0111 8
205#define b_1000 7
206#define b_1001 6
207#define b_1010 5
208#define b_1011 4
209#define b_1100 3
210#define b_1101 2
211#define b_1110 1
212#define b_1111 0
213
214static unsigned char irtab[16] = {
215 b_0000, b_1000, b_0100, b_1100,
216 b_0010, b_1010, b_0110, b_1110,
217 b_0001, b_1001, b_0101, b_1101,
218 b_0011, b_1011, b_0111, b_1111
219};
220 202
221static void str_invert_revert(unsigned char *b, int len) 203static void str_invert_revert(unsigned char *b, int len)
222{ 204{
223 int i; 205 int i;
224 206
225 for (i = 0; i < len; i++) 207 for (i = 0; i < len; i++)
226 b[i] = (irtab[b[i] & 0x0f] << 4) | irtab[b[i] >> 4]; 208 b[i] = invert_revert(b[i]);
227}
228
229static unsigned char invert_revert(unsigned char ch)
230{
231 return (irtab[ch & 0x0f] << 4) | irtab[ch >> 4];
232} 209}
233 210
234#define ATRLENCK(dev,pos) \ 211#define ATRLENCK(dev,pos) \