diff options
Diffstat (limited to 'drivers/mtd/nand/davinci_nand.c')
| -rw-r--r-- | drivers/mtd/nand/davinci_nand.c | 55 |
1 files changed, 22 insertions, 33 deletions
diff --git a/drivers/mtd/nand/davinci_nand.c b/drivers/mtd/nand/davinci_nand.c index 8ef18b8..8b22024 100644 --- a/drivers/mtd/nand/davinci_nand.c +++ b/drivers/mtd/nand/davinci_nand.c @@ -49,6 +49,8 @@ extern struct nand_chip nand_dev_desc[CONFIG_SYS_MAX_NAND_DEVICE]; +static emif_registers *const emif_regs = (void *) DAVINCI_ASYNC_EMIF_CNTRL_BASE; + static void nand_davinci_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl) { struct nand_chip *this = mtd->priv; @@ -115,34 +117,31 @@ static struct nand_ecclayout davinci_nand_ecclayout = { static void nand_davinci_enable_hwecc(struct mtd_info *mtd, int mode) { - emifregs emif_addr; int dummy; - emif_addr = (emifregs)DAVINCI_ASYNC_EMIF_CNTRL_BASE; - - dummy = emif_addr->NANDF1ECC; - dummy = emif_addr->NANDF2ECC; - dummy = emif_addr->NANDF3ECC; - dummy = emif_addr->NANDF4ECC; + dummy = emif_regs->NANDF1ECC; +#ifdef CONFIG_SYS_DAVINCI_BROKEN_ECC + dummy = emif_regs->NANDF2ECC; + dummy = emif_regs->NANDF3ECC; + dummy = emif_regs->NANDF4ECC; +#endif - emif_addr->NANDFCR |= (1 << 8); + /* FIXME: only chipselect 0 is supported for now */ + emif_regs->NANDFCR |= 1 << 8; } static u_int32_t nand_davinci_readecc(struct mtd_info *mtd, u_int32_t region) { u_int32_t ecc = 0; - emifregs emif_base_addr; - - emif_base_addr = (emifregs)DAVINCI_ASYNC_EMIF_CNTRL_BASE; if (region == 1) - ecc = emif_base_addr->NANDF1ECC; + ecc = emif_regs->NANDF1ECC; else if (region == 2) - ecc = emif_base_addr->NANDF2ECC; + ecc = emif_regs->NANDF2ECC; else if (region == 3) - ecc = emif_base_addr->NANDF3ECC; + ecc = emif_regs->NANDF3ECC; else if (region == 4) - ecc = emif_base_addr->NANDF4ECC; + ecc = emif_regs->NANDF4ECC; return(ecc); } @@ -369,24 +368,18 @@ static int nand_davinci_correct_data(struct mtd_info *mtd, u_char *dat, u_char * static int nand_davinci_dev_ready(struct mtd_info *mtd) { - emifregs emif_addr; - - emif_addr = (emifregs)DAVINCI_ASYNC_EMIF_CNTRL_BASE; - - return(emif_addr->NANDFSR & 0x1); -} - -static int nand_davinci_waitfunc(struct mtd_info *mtd, struct nand_chip *this) -{ - while(!nand_davinci_dev_ready(mtd)) {;} - *NAND_CE0CLE = NAND_STATUS; - return(*NAND_CE0DATA); + return emif_regs->NANDFSR & 0x1; } static void nand_flash_init(void) { + /* This is for DM6446 EVM and *very* similar. DO NOT GROW THIS! + * Instead, have your board_init() set EMIF timings, based on its + * knowledge of the clocks and what devices are hooked up ... and + * don't even do that unless no UBL handled it. + */ +#ifdef CONFIG_SOC_DM6446 u_int32_t acfg1 = 0x3ffffffc; - emifregs emif_regs; /*------------------------------------------------------------------* * NAND FLASH CHIP TIMEOUT @ 459 MHz * @@ -408,17 +401,14 @@ static void nand_flash_init(void) | (0 << 0 ) /* asyncSize 8-bit bus */ ; - emif_regs = (emifregs)DAVINCI_ASYNC_EMIF_CNTRL_BASE; - emif_regs->AB1CR = acfg1; /* CS2 */ emif_regs->NANDFCR = 0x00000101; /* NAND flash on CS2 */ +#endif } int board_nand_init(struct nand_chip *nand) { - nand->IO_ADDR_R = (void __iomem *)NAND_CE0DATA; - nand->IO_ADDR_W = (void __iomem *)NAND_CE0DATA; nand->chip_delay = 0; nand->select_chip = nand_davinci_select_chip; #ifdef CONFIG_SYS_NAND_USE_FLASH_BBT @@ -452,7 +442,6 @@ int board_nand_init(struct nand_chip *nand) nand->cmd_ctrl = nand_davinci_hwcontrol; nand->dev_ready = nand_davinci_dev_ready; - nand->waitfunc = nand_davinci_waitfunc; nand_flash_init(); |