From 7608194c4ae454fab23b8d940986eeb9c58c3478 Mon Sep 17 00:00:00 2001 From: David Woodhouse Date: Fri, 27 Oct 2006 15:40:51 +0300 Subject: [PATCH] =?utf8?q?[MTD]=20NAND:=20Add=20ECC=20debugging=20for=20CA?= =?utf8?q?F=C3=89?= MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Signed-off-by: David Woodhouse --- drivers/mtd/nand/cafe_ecc.c | 39 ++++++++++++++++++++++++++++++++++--- 1 file changed, 36 insertions(+), 3 deletions(-) diff --git a/drivers/mtd/nand/cafe_ecc.c b/drivers/mtd/nand/cafe_ecc.c index 46214602d2..2d29265cc9 100644 --- a/drivers/mtd/nand/cafe_ecc.c +++ b/drivers/mtd/nand/cafe_ecc.c @@ -19,6 +19,7 @@ */ #include +#include #include static unsigned short gf4096_mul(unsigned short, unsigned short); @@ -1322,16 +1323,43 @@ void correct_12bit_symbol(unsigned char *buf, unsigned short sym, buf[2+(3*(sym-2))/2] ^= (val >> 8); buf[3+(3*(sym-2))/2] ^= (val & 0xff); } - - } +static int debugecc = 0; +module_param(debugecc, int, 0644); + int cafe_correct_ecc(unsigned char *buf, unsigned short *chk_syndrome_list) { unsigned short err_info[9]; int i; + if (debugecc) { + printk(KERN_WARNING "cafe_correct_ecc invoked. Syndromes %x %x %x %x %x %x %x %x\n", + chk_syndrome_list[0], chk_syndrome_list[1], + chk_syndrome_list[2], chk_syndrome_list[3], + chk_syndrome_list[4], chk_syndrome_list[5], + chk_syndrome_list[6], chk_syndrome_list[7]); + for (i=0; i < 2048; i+=16) { + printk(KERN_WARNING "D %04x: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", + i, + buf[i], buf[i+1], buf[i+2], buf[i+3], + buf[i+4], buf[i+5], buf[i+6], buf[i+7], + buf[i+8], buf[i+9], buf[i+10], buf[i+11], + buf[i+12], buf[i+13], buf[i+14], buf[i+15]); + } + for ( ; i < 2112; i+=16) { + printk(KERN_WARNING "O %02x: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", + i - 2048, + buf[i], buf[i+1], buf[i+2], buf[i+3], + buf[i+4], buf[i+5], buf[i+6], buf[i+7], + buf[i+8], buf[i+9], buf[i+10], buf[i+11], + buf[i+12], buf[i+13], buf[i+14], buf[i+15]); + } + } + + + if (chk_no_err_only(chk_syndrome_list, err_info) && chk_1_err_only(chk_syndrome_list, err_info) && chk_2_err_only(chk_syndrome_list, err_info) && @@ -1340,8 +1368,13 @@ int cafe_correct_ecc(unsigned char *buf, return -EIO; } - for (i=0; i < err_info[0]; i++) + for (i=0; i < err_info[0]; i++) { + if (debugecc) + printk(KERN_WARNING "Correct symbol %d with 0x%03x\n", + err_info[1+i], err_info[5+i]); + correct_12bit_symbol(buf, err_info[1+i], err_info[5+i]); + } return err_info[0]; } -- 2.39.5