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staging: brcm80211: make use of crc8 library function 

The crc8 function is now available as a library function provided
by kernel module crc8.ko. The function has been removed from brcmutil
module and srom.c now uses crc8 library function.

Reviewed-by: Henry Ptasinski <henryp@broadcom.com>
Reviewed-by: Roland Vossen <rvossen@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Arend van Spriel 2011-08-23 14:13:54 +02:00 committed by Greg Kroah-Hartman
parent 75e07b6b2b
commit 0ed129c9df
4 changed files with 17 additions and 78 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/staging/brcm80211/Kconfig
View File

@ -11,6 +11,7 @@ config BRCMSMAC
select BRCMUTIL select BRCMUTIL
select FW_LOADER select FW_LOADER
select CRC_CCITT select CRC_CCITT
select CRC8
---help--- ---help---
This module adds support for PCIe wireless adapters based on Broadcom This module adds support for PCIe wireless adapters based on Broadcom
IEEE802.11n SoftMAC chipsets. If you choose to build a module, it'll IEEE802.11n SoftMAC chipsets. If you choose to build a module, it'll

20
drivers/staging/brcm80211/brcmsmac/srom.c
View File

@ -18,6 +18,7 @@
#include <linux/string.h> #include <linux/string.h>
#include <linux/io.h> #include <linux/io.h>
#include <linux/etherdevice.h> #include <linux/etherdevice.h>
#include <linux/crc8.h>
#include <stdarg.h> #include <stdarg.h>
#include <chipcommon.h> #include <chipcommon.h>
@ -39,6 +40,13 @@
#define WRITE_WORD_DELAY 20 #define WRITE_WORD_DELAY 20
#endif #endif
/*
* SROM CRC8 polynomial value:
*
* x^8 + x^7 +x^6 + x^4 + x^2 + 1
*/
#define SROM_CRC8_POLY 0xAB
/* Maximum srom: 6 Kilobits == 768 bytes */ /* Maximum srom: 6 Kilobits == 768 bytes */
#define SROM_MAX 768 #define SROM_MAX 768
@ -782,6 +790,8 @@ static const struct brcms_sromvar perpath_pci_sromvars[] = {
{NULL, 0, 0, 0, 0} {NULL, 0, 0, 0, 0}
}; };
static u8 srom_crc8_table[CRC8_TABLE_SIZE];
static void _initvars_srom_pci(u8 sromrev, u16 *srom, uint off, static void _initvars_srom_pci(u8 sromrev, u16 *srom, uint off,
struct brcms_varbuf *b); struct brcms_varbuf *b);
static int initvars_srom_pci(struct si_pub *sih, void *curmap, char **vars, static int initvars_srom_pci(struct si_pub *sih, void *curmap, char **vars,
@ -919,8 +929,8 @@ sprom_read_pci(struct si_pub *sih, u16 *sprom, uint wordoff,
/* fixup the endianness so crc8 will pass */ /* fixup the endianness so crc8 will pass */
htol16_buf(buf, nwords * 2); htol16_buf(buf, nwords * 2);
if (brcmu_crc8((u8 *) buf, nwords * 2, CRC8_INIT_VALUE) != if (crc8(srom_crc8_table, (u8 *) buf, nwords * 2,
CRC8_GOOD_VALUE) CRC8_INIT_VALUE) != CRC8_GOOD_VALUE(srom_crc8_table))
/* DBG only pci always read srom4 first, then srom8/9 */ /* DBG only pci always read srom4 first, then srom8/9 */
err = -EIO; err = -EIO;
@ -957,8 +967,8 @@ static int otp_read_pci(struct si_pub *sih, u16 *buf, uint bufsz)
/* fixup the endianness so crc8 will pass */ /* fixup the endianness so crc8 will pass */
htol16_buf(buf, bufsz); htol16_buf(buf, bufsz);
if (brcmu_crc8((u8 *) buf, SROM4_WORDS * 2, CRC8_INIT_VALUE) != if (crc8(srom_crc8_table, (u8 *) buf, SROM4_WORDS * 2,
CRC8_GOOD_VALUE) CRC8_INIT_VALUE) != CRC8_GOOD_VALUE(srom_crc8_table))
err = -EIO; err = -EIO;
/* now correct the endianness of the byte array */ /* now correct the endianness of the byte array */
@ -1174,6 +1184,8 @@ static int initvars_srom_pci(struct si_pub *sih, void *curmap, char **vars,
return -ENOMEM; return -ENOMEM;
sromwindow = (u16 *) SROM_OFFSET(sih); sromwindow = (u16 *) SROM_OFFSET(sih);
crc8_populate_lsb(srom_crc8_table, SROM_CRC8_POLY);
if (ai_is_sprom_available(sih)) { if (ai_is_sprom_available(sih)) {
err = sprom_read_pci(sih, sromwindow, 0, srom, SROM_WORDS, err = sprom_read_pci(sih, sromwindow, 0, srom, SROM_WORDS,
true); true);

69
drivers/staging/brcm80211/brcmutil/utils.c
View File

@ -431,75 +431,6 @@ int brcmu_iovar_lencheck(const struct brcmu_iovar *vi, void *arg, int len,
} }
EXPORT_SYMBOL(brcmu_iovar_lencheck); EXPORT_SYMBOL(brcmu_iovar_lencheck);
/*******************************************************************************
* crc8
*
* Computes a crc8 over the input data using the polynomial:
*
* x^8 + x^7 +x^6 + x^4 + x^2 + 1
*
* The caller provides the initial value (either CRC8_INIT_VALUE
* or the previous returned value) to allow for processing of
* discontiguous blocks of data. When generating the CRC the
* caller is responsible for complementing the final return value
* and inserting it into the byte stream. When checking, a final
* return value of CRC8_GOOD_VALUE indicates a valid CRC.
*
* Reference: Dallas Semiconductor Application Note 27
* Williams, Ross N., "A Painless Guide to CRC Error Detection Algorithms",
* ver 3, Aug 1993, ross@guest.adelaide.edu.au, Rocksoft Pty Ltd.,
* ftp://ftp.rocksoft.com/clients/rocksoft/papers/crc_v3.txt
*
* ****************************************************************************
*/
static const u8 crc8_table[256] = {
0x00, 0xF7, 0xB9, 0x4E, 0x25, 0xD2, 0x9C, 0x6B,
0x4A, 0xBD, 0xF3, 0x04, 0x6F, 0x98, 0xD6, 0x21,
0x94, 0x63, 0x2D, 0xDA, 0xB1, 0x46, 0x08, 0xFF,
0xDE, 0x29, 0x67, 0x90, 0xFB, 0x0C, 0x42, 0xB5,
0x7F, 0x88, 0xC6, 0x31, 0x5A, 0xAD, 0xE3, 0x14,
0x35, 0xC2, 0x8C, 0x7B, 0x10, 0xE7, 0xA9, 0x5E,
0xEB, 0x1C, 0x52, 0xA5, 0xCE, 0x39, 0x77, 0x80,
0xA1, 0x56, 0x18, 0xEF, 0x84, 0x73, 0x3D, 0xCA,
0xFE, 0x09, 0x47, 0xB0, 0xDB, 0x2C, 0x62, 0x95,
0xB4, 0x43, 0x0D, 0xFA, 0x91, 0x66, 0x28, 0xDF,
0x6A, 0x9D, 0xD3, 0x24, 0x4F, 0xB8, 0xF6, 0x01,
0x20, 0xD7, 0x99, 0x6E, 0x05, 0xF2, 0xBC, 0x4B,
0x81, 0x76, 0x38, 0xCF, 0xA4, 0x53, 0x1D, 0xEA,
0xCB, 0x3C, 0x72, 0x85, 0xEE, 0x19, 0x57, 0xA0,
0x15, 0xE2, 0xAC, 0x5B, 0x30, 0xC7, 0x89, 0x7E,
0x5F, 0xA8, 0xE6, 0x11, 0x7A, 0x8D, 0xC3, 0x34,
0xAB, 0x5C, 0x12, 0xE5, 0x8E, 0x79, 0x37, 0xC0,
0xE1, 0x16, 0x58, 0xAF, 0xC4, 0x33, 0x7D, 0x8A,
0x3F, 0xC8, 0x86, 0x71, 0x1A, 0xED, 0xA3, 0x54,
0x75, 0x82, 0xCC, 0x3B, 0x50, 0xA7, 0xE9, 0x1E,
0xD4, 0x23, 0x6D, 0x9A, 0xF1, 0x06, 0x48, 0xBF,
0x9E, 0x69, 0x27, 0xD0, 0xBB, 0x4C, 0x02, 0xF5,
0x40, 0xB7, 0xF9, 0x0E, 0x65, 0x92, 0xDC, 0x2B,
0x0A, 0xFD, 0xB3, 0x44, 0x2F, 0xD8, 0x96, 0x61,
0x55, 0xA2, 0xEC, 0x1B, 0x70, 0x87, 0xC9, 0x3E,
0x1F, 0xE8, 0xA6, 0x51, 0x3A, 0xCD, 0x83, 0x74,
0xC1, 0x36, 0x78, 0x8F, 0xE4, 0x13, 0x5D, 0xAA,
0x8B, 0x7C, 0x32, 0xC5, 0xAE, 0x59, 0x17, 0xE0,
0x2A, 0xDD, 0x93, 0x64, 0x0F, 0xF8, 0xB6, 0x41,
0x60, 0x97, 0xD9, 0x2E, 0x45, 0xB2, 0xFC, 0x0B,
0xBE, 0x49, 0x07, 0xF0, 0x9B, 0x6C, 0x22, 0xD5,
0xF4, 0x03, 0x4D, 0xBA, 0xD1, 0x26, 0x68, 0x9F
};
u8 brcmu_crc8(u8 *pdata, /* pointer to array of data to process */
uint nbytes, /* number of input data bytes to process */
u8 crc /* either CRC8_INIT_VALUE or previous return value */
) {
/* loop over the buffer data */
while (nbytes-- > 0)
crc = crc8_table[(crc ^ *pdata++) & 0xff];
return crc;
}
EXPORT_SYMBOL(brcmu_crc8);
/* /*
* Traverse a string of 1-byte tag/1-byte length/variable-length value * Traverse a string of 1-byte tag/1-byte length/variable-length value
* triples, returning a pointer to the substring whose first element * triples, returning a pointer to the substring whose first element

5
drivers/staging/brcm80211/include/brcmu_utils.h
View File

@ -246,8 +246,6 @@ extern int brcmu_iovar_lencheck(const struct brcmu_iovar *table, void *arg,
#define MODSUB_POW2(x, y, bound) (((x) - (y)) & ((bound) - 1)) #define MODSUB_POW2(x, y, bound) (((x) - (y)) & ((bound) - 1))
/* crc defines */ /* crc defines */
#define CRC8_INIT_VALUE 0xff /* Initial CRC8 checksum value */
#define CRC8_GOOD_VALUE 0x9f /* Good final CRC8 checksum value */
#define CRC16_INIT_VALUE 0xffff /* Initial CRC16 checksum value */ #define CRC16_INIT_VALUE 0xffff /* Initial CRC16 checksum value */
#define CRC16_GOOD_VALUE 0xf0b8 /* Good final CRC16 checksum value */ #define CRC16_GOOD_VALUE 0xf0b8 /* Good final CRC16 checksum value */
@ -268,9 +266,6 @@ struct brcmu_tlv {
#define ETHER_ADDR_STR_LEN 18 #define ETHER_ADDR_STR_LEN 18
/* externs */ /* externs */
/* crc */
extern u8 brcmu_crc8(u8 *p, uint nbytes, u8 crc);
/* format/print */ /* format/print */
#if defined(BCMDBG) #if defined(BCMDBG)
extern int brcmu_format_flags(const struct brcmu_bit_desc *bd, u32 flags, extern int brcmu_format_flags(const struct brcmu_bit_desc *bd, u32 flags,