From be8444bdf34f7ba21e2364ca296c68e81033e3b2 Mon Sep 17 00:00:00 2001 From: David Woodhouse Date: Tue, 31 Oct 2006 12:36:04 +0800 Subject: [PATCH] =?utf8?q?[MTD]=20NAND:=20Add=20register=20debugging=20spe?= =?utf8?q?w=20option=20to=20CAF=C3=89=20driver?= MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Signed-off-by: David Woodhouse --- drivers/mtd/nand/cafe.c | 26 +++++++++++++------------- 1 file changed, 13 insertions(+), 13 deletions(-) diff --git a/drivers/mtd/nand/cafe.c b/drivers/mtd/nand/cafe.c index 175cf82..c5d03b0 100644 --- a/drivers/mtd/nand/cafe.c +++ b/drivers/mtd/nand/cafe.c @@ -72,6 +72,9 @@ module_param(skipbbt, int, 0644); static int debug = 0; module_param(debug, int, 0644); +static int regdebug = 0; +module_param(regdebug, int, 0644); + static int checkecc = 1; module_param(checkecc, int, 0644); @@ -228,12 +231,6 @@ static void cafe_nand_cmdfunc(struct mtd_info *mtd, unsigned command, cafe_writel(cafe, cafe->ctl2 | 0x100 | NAND_CMD_READSTART, NAND_CTRL2); do_command: -#if 0 - /* http://dev.laptop.org/ticket/200 - ECC on read only works if we read precisely 0x80e bytes */ - if (cafe->datalen == 2112) - cafe->datalen = 2062; -#endif cafe_dev_dbg(&cafe->pdev->dev, "dlen %x, ctl1 %x, ctl2 %x\n", cafe->datalen, ctl1, cafe_readl(cafe, NAND_CTRL2)); @@ -254,13 +251,13 @@ static void cafe_nand_cmdfunc(struct mtd_info *mtd, unsigned command, } cafe->datalen = 0; -#if 0 - { int i; - printk("About to write command %08x\n", ctl1); - for (i=0; i< 0x5c; i+=4) - printk("Register %x: %08x\n", i, readl(cafe->mmio + i)); + if (unlikely(regdebug)) { + int i; + printk("About to write command %08x to register 0\n", ctl1); + for (i=4; i< 0x5c; i+=4) + printk("Register %x: %08x\n", i, readl(cafe->mmio + i)); } -#endif + cafe_writel(cafe, ctl1, NAND_CTRL1); /* Apply this short delay always to ensure that we do wait tWB in * any case on any machine. */ @@ -388,7 +385,10 @@ static int cafe_nand_read_page(struct mtd_info *mtd, struct nand_chip *chip, } if ((i = cafe_correct_ecc(buf, syn)) < 0) { - dev_dbg(&cafe->pdev->dev, "Failed to correct ECC\n"); + dev_dbg(&cafe->pdev->dev, "Failed to correct ECC at %08x\n", + cafe_readl(cafe, NAND_ADDR2) * 2048); + for (i=0; i< 0x5c; i+=4) + printk("Register %x: %08x\n", i, readl(cafe->mmio + i)); mtd->ecc_stats.failed++; } else { dev_dbg(&cafe->pdev->dev, "Corrected %d symbol errors\n", i); -- 2.7.4