diff options
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/nand/fsl_ifc_nand.c | 62 |
1 files changed, 61 insertions, 1 deletions
diff --git a/drivers/mtd/nand/fsl_ifc_nand.c b/drivers/mtd/nand/fsl_ifc_nand.c index f473003769..0878bece67 100644 --- a/drivers/mtd/nand/fsl_ifc_nand.c +++ b/drivers/mtd/nand/fsl_ifc_nand.c @@ -30,6 +30,7 @@ #include <asm/errno.h> #include <asm/fsl_ifc.h> +#define FSL_IFC_V1_1_0 0x01010000 #define MAX_BANKS 4 #define ERR_BYTE 0xFF /* Value returned for read bytes when read failed */ @@ -738,11 +739,66 @@ static void fsl_ifc_select_chip(struct mtd_info *mtd, int chip) { } +static void fsl_ifc_sram_init(void) +{ + struct fsl_ifc *ifc = ifc_ctrl->regs; + uint32_t cs = 0, csor = 0, csor_8k = 0, csor_ext = 0; + long long end_tick; + + cs = ifc_ctrl->cs_nand >> IFC_NAND_CSEL_SHIFT; + + /* Save CSOR and CSOR_ext */ + csor = in_be32(&ifc_ctrl->regs->csor_cs[cs].csor); + csor_ext = in_be32(&ifc_ctrl->regs->csor_cs[cs].csor_ext); + + /* chage PageSize 8K and SpareSize 1K*/ + csor_8k = (csor & ~(CSOR_NAND_PGS_MASK)) | 0x0018C000; + out_be32(&ifc_ctrl->regs->csor_cs[cs].csor, csor_8k); + out_be32(&ifc_ctrl->regs->csor_cs[cs].csor_ext, 0x0000400); + + /* READID */ + out_be32(&ifc->ifc_nand.nand_fir0, + (IFC_FIR_OP_CMD0 << IFC_NAND_FIR0_OP0_SHIFT) | + (IFC_FIR_OP_UA << IFC_NAND_FIR0_OP1_SHIFT) | + (IFC_FIR_OP_RB << IFC_NAND_FIR0_OP2_SHIFT)); + out_be32(&ifc->ifc_nand.nand_fcr0, + NAND_CMD_READID << IFC_NAND_FCR0_CMD0_SHIFT); + out_be32(&ifc->ifc_nand.row3, 0x0); + + out_be32(&ifc->ifc_nand.nand_fbcr, 0x0); + + /* Program ROW0/COL0 */ + out_be32(&ifc->ifc_nand.row0, 0x0); + out_be32(&ifc->ifc_nand.col0, 0x0); + + /* set the chip select for NAND Transaction */ + out_be32(&ifc->ifc_nand.nand_csel, ifc_ctrl->cs_nand); + + /* start read seq */ + out_be32(&ifc->ifc_nand.nandseq_strt, IFC_NAND_SEQ_STRT_FIR_STRT); + + /* wait for NAND Machine complete flag or timeout */ + end_tick = usec2ticks(IFC_TIMEOUT_MSECS * 1000) + get_ticks(); + + while (end_tick > get_ticks()) { + ifc_ctrl->status = in_be32(&ifc->ifc_nand.nand_evter_stat); + + if (ifc_ctrl->status & IFC_NAND_EVTER_STAT_OPC) + break; + } + + out_be32(&ifc->ifc_nand.nand_evter_stat, ifc_ctrl->status); + + /* Restore CSOR and CSOR_ext */ + out_be32(&ifc_ctrl->regs->csor_cs[cs].csor, csor); + out_be32(&ifc_ctrl->regs->csor_cs[cs].csor_ext, csor_ext); +} + int board_nand_init(struct nand_chip *nand) { struct fsl_ifc_mtd *priv; struct nand_ecclayout *layout; - uint32_t cspr = 0, csor = 0; + uint32_t cspr = 0, csor = 0, ver = 0; if (!ifc_ctrl) { fsl_ifc_ctrl_init(); @@ -861,5 +917,9 @@ int board_nand_init(struct nand_chip *nand) nand->ecc.mode = NAND_ECC_SOFT; } + ver = in_be32(&ifc_ctrl->regs->ifc_rev); + if (ver == FSL_IFC_V1_1_0) + fsl_ifc_sram_init(); + return 0; } |