diff options
| author | Jason Liu <r64343@freescale.com> | 2010-12-01 17:17:51 +0800 |
|---|---|---|
| committer | Jason Liu <r64343@freescale.com> | 2010-12-02 11:04:48 +0800 |
| commit | 57f9aa6a2fe468a8f09e993331b78bd7d8bfaca1 (patch) | |
| tree | 21ea49d09650f18b960307aa0741f35114b225b9 /drivers/mtd | |
| parent | 8f45d72bbe87ac8569eddf4551399c479b9c5691 (diff) | |
ENGR00134220 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_nd2.c | 7 | ||||
| -rw-r--r-- | drivers/mtd/nand/mxc_nd2.h | 6 |
2 files changed, 12 insertions, 1 deletions
diff --git a/drivers/mtd/nand/mxc_nd2.c b/drivers/mtd/nand/mxc_nd2.c index 5e45cc40f2fe..f8db0442bce1 100644 --- a/drivers/mtd/nand/mxc_nd2.c +++ b/drivers/mtd/nand/mxc_nd2.c @@ -291,7 +291,7 @@ static void auto_cmd_interleave(struct mtd_info *mtd, u16 cmd) else page_addr = addr_low >> 16 | addr_high << 16; - ncs = page_addr >> (this->chip_shift - this->page_shift); + ncs = NFC_GET_NFC_ACTIVE_CS(); if (j > 1) { page_addr *= j; @@ -529,6 +529,8 @@ static u16 get_dev_status(void) #ifdef NFC_AUTO_MODE_ENABLE int i; u16 status = 0; + int cs = NFC_GET_NFC_ACTIVE_CS(); + for (i = 0; i < num_of_interleave; i++) { /* set ative cs */ @@ -544,6 +546,9 @@ static u16 get_dev_status(void) break; } + /* Restore active CS */ + NFC_SET_NFC_ACTIVE_CS(cs); + return status; #else volatile u16 *mainBuf = MAIN_AREA1; diff --git a/drivers/mtd/nand/mxc_nd2.h b/drivers/mtd/nand/mxc_nd2.h index d6b19deed301..4120c2aa1722 100644 --- a/drivers/mtd/nand/mxc_nd2.h +++ b/drivers/mtd/nand/mxc_nd2.h @@ -381,6 +381,10 @@ do { \ (NFC_FIELD_RESET(NFC_ACTIVE_CS_WIDTH, NFC_ACTIVE_CS_SHIFT))) | \ ((val) << NFC_ACTIVE_CS_SHIFT), NFC_CONFIG1); +#define NFC_GET_NFC_ACTIVE_CS() \ + ((raw_read(NFC_CONFIG1) >> NFC_ACTIVE_CS_SHIFT) & \ + ((1 << NFC_ACTIVE_CS_WIDTH) - 1)) + #define NFC_GET_MAXCHIP_SP() 8 #else @@ -389,6 +393,7 @@ do { \ (end_addr << NFC_UNLOCK_END_ADDR_SHIFT), REG_UNLOCK_BLK_ADD0); #define NFC_SET_NFC_ACTIVE_CS(val) +#define NFC_GET_NFC_ACTIVE_CS() #define NFC_GET_MAXCHIP_SP() 1 #endif @@ -680,6 +685,7 @@ do { \ } #define NFC_SET_NFC_ACTIVE_CS(val) +#define NFC_GET_NFC_ACTIVE_CS() #define NFC_GET_MAXCHIP_SP() 1 #define NFC_SET_WPC(val) val |