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| author | Jason Liu <r64343@freescale.com> | 2010-12-03 11:08:12 +0800 |
|---|---|---|
| committer | Jason Liu <r64343@freescale.com> | 2010-12-07 15:33:56 +0800 |
| commit | d509a056972ea643382f4763768faeeb3aecc6f0 (patch) | |
| tree | 4f9f21cc9f46522774ec773e9054c4098bf85f27 /drivers/mtd | |
| parent | 298e4cf6838aca016388f6fdfc7ce80cb7902228 (diff) | |
| download | u-boot-imx-d509a056972ea643382f4763768faeeb3aecc6f0.zip u-boot-imx-d509a056972ea643382f4763768faeeb3aecc6f0.tar.gz u-boot-imx-d509a056972ea643382f4763768faeeb3aecc6f0.tar.bz2 | |
ENGR00134220-1 NAND: fix up the chip select handling
When the NAND has multi-cs, the chip select other than
cs0 is not handled correctly which will lead to NAND not
function as expected
Signed-off-by: Jason Liu <r64343@freescale.com>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/nand/mxc_nand.c | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c index a098c8f..eb20f58 100644 --- a/drivers/mtd/nand/mxc_nand.c +++ b/drivers/mtd/nand/mxc_nand.c @@ -324,21 +324,28 @@ static void send_cmd_interleave(struct mtd_info *mtd, u16 cmd) u8 *obuf = info->oob_buf; u32 dlen = mtd->writesize / j; u32 olen = mtd->oobsize / j; + u32 ncs = 0; /* adjust the addr value * since ADD_OP mode is 01 */ - if (j > 1) + if (cmd == NAND_CMD_ERASE2) + page_addr = addr_low; + + ncs = NFC_GET_NFC_ACTIVE_CS(); + + if (j > 1) { page_addr *= j; - else + } else { page_addr *= this->numchips; + page_addr += ncs; + } switch (cmd) { case NAND_CMD_PAGEPROG: for (i = 0; i < j; i++) { /* reset addr cycle */ - if (j > 1) - mxc_nand_addr_cycle(mtd, 0, page_addr++); + mxc_nand_addr_cycle(mtd, 0, page_addr++); /* data transfer */ nfc_memcpy(MAIN_AREA0, dbuf, dlen); @@ -365,8 +372,7 @@ static void send_cmd_interleave(struct mtd_info *mtd, u16 cmd) case NAND_CMD_READSTART: for (i = 0; i < j; i++) { /* reset addr cycle */ - if (j > 1) - mxc_nand_addr_cycle(mtd, 0, page_addr++); + mxc_nand_addr_cycle(mtd, 0, page_addr++); NFC_SET_RBA(0); raw_write(0, REG_NFC_OPS_STAT); @@ -388,10 +394,6 @@ static void send_cmd_interleave(struct mtd_info *mtd, u16 cmd) break; case NAND_CMD_ERASE2: for (i = 0; i < j; i++) { - if (!i) { - page_addr = addr_low; - page_addr *= (j > 1 ? j : this->numchips); - } mxc_nand_addr_cycle(mtd, -1, page_addr++); raw_write(0, REG_NFC_OPS_STAT); raw_write(NFC_AUTO_ERASE, REG_NFC_OPS); @@ -552,6 +554,7 @@ static u16 mxc_do_status_auto(struct mtd_info *mtd) #ifdef CONFIG_MXC_NFC_SP_AUTO int i = 0; u32 mask = 0xFF << 16; + int cs = NFC_GET_NFC_ACTIVE_CS(); struct nand_chip *this = mtd->priv; struct nand_info *info = this->priv; @@ -576,6 +579,9 @@ static u16 mxc_do_status_auto(struct mtd_info *mtd) if (status & NAND_STATUS_FAIL) break; } + + /* Restore active CS */ + NFC_SET_NFC_ACTIVE_CS(cs); #endif return status; } |