diff options
Diffstat (limited to 'drivers/mtd')
-rw-r--r-- | drivers/mtd/nand/fsl_upm.c | 82 | ||||
-rw-r--r-- | drivers/mtd/nand/nand.c | 6 | ||||
-rw-r--r-- | drivers/mtd/nand/nand_base.c | 2 |
3 files changed, 73 insertions, 17 deletions
diff --git a/drivers/mtd/nand/fsl_upm.c b/drivers/mtd/nand/fsl_upm.c index 1a1d8c4..7cb99cb 100644 --- a/drivers/mtd/nand/fsl_upm.c +++ b/drivers/mtd/nand/fsl_upm.c @@ -31,26 +31,59 @@ static void fsl_upm_end_pattern(struct fsl_upm *upm) eieio(); } -static void fsl_upm_run_pattern(struct fsl_upm *upm, int width, u32 cmd) +static void fsl_upm_run_pattern(struct fsl_upm *upm, int width, + void __iomem *io_addr, u32 mar) { - out_be32(upm->mar, cmd << (32 - width)); + out_be32(upm->mar, mar); switch (width) { case 8: - out_8(upm->io_addr, 0x0); + out_8(io_addr, 0x0); break; case 16: - out_be16(upm->io_addr, 0x0); + out_be16(io_addr, 0x0); break; case 32: - out_be32(upm->io_addr, 0x0); + out_be32(io_addr, 0x0); break; } } +static void fun_wait(struct fsl_upm_nand *fun) +{ + if (fun->dev_ready) { + while (!fun->dev_ready(fun->chip_nr)) + debug("unexpected busy state\n"); + } else { + /* + * If the R/B pin is not connected, like on the TQM8548, + * a short delay is necessary. + */ + udelay(1); + } +} + +#if CONFIG_SYS_NAND_MAX_CHIPS > 1 +static void fun_select_chip(struct mtd_info *mtd, int chip_nr) +{ + struct nand_chip *chip = mtd->priv; + struct fsl_upm_nand *fun = chip->priv; + + if (chip_nr >= 0) { + fun->chip_nr = chip_nr; + chip->IO_ADDR_R = chip->IO_ADDR_W = + fun->upm.io_addr + fun->chip_offset * chip_nr; + } else if (chip_nr == -1) { + chip->cmd_ctrl(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE); + } +} +#endif + static void fun_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl) { struct nand_chip *chip = mtd->priv; struct fsl_upm_nand *fun = chip->priv; + void __iomem *io_addr; + u32 mar; if (!(ctrl & fun->last_ctrl)) { fsl_upm_end_pattern(&fun->upm); @@ -68,18 +101,25 @@ static void fun_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl) fsl_upm_start_pattern(&fun->upm, fun->upm_cmd_offset); } - fsl_upm_run_pattern(&fun->upm, fun->width, cmd); + mar = cmd << (32 - fun->width); + io_addr = fun->upm.io_addr; +#if CONFIG_SYS_NAND_MAX_CHIPS > 1 + if (fun->chip_nr > 0) { + io_addr += fun->chip_offset * fun->chip_nr; + if (fun->upm_mar_chip_offset) + mar |= fun->upm_mar_chip_offset * fun->chip_nr; + } +#endif + fsl_upm_run_pattern(&fun->upm, fun->width, io_addr, mar); /* - * Some boards/chips needs this. At least on MPC8360E-RDK we - * need it. Probably weird chip, because I don't see any need - * for this on MPC8555E + Samsung K9F1G08U0A. Usually here are - * 0-2 unexpected busy states per block read. + * Some boards/chips needs this. At least the MPC8360E-RDK and + * TQM8548 need it. Probably weird chip, because I don't see + * any need for this on MPC8555E + Samsung K9F1G08U0A. Usually + * here are 0-2 unexpected busy states per block read. */ - if (fun->wait_pattern) { - while (!fun->dev_ready()) - debug("unexpected busy state\n"); - } + if (fun->wait_flags & FSL_UPM_WAIT_RUN_PATTERN) + fun_wait(fun); } static u8 nand_read_byte(struct mtd_info *mtd) @@ -93,9 +133,16 @@ static void nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len) { int i; struct nand_chip *chip = mtd->priv; + struct fsl_upm_nand *fun = chip->priv; - for (i = 0; i < len; i++) + for (i = 0; i < len; i++) { out_8(chip->IO_ADDR_W, buf[i]); + if (fun->wait_flags & FSL_UPM_WAIT_WRITE_BYTE) + fun_wait(fun); + } + + if (fun->wait_flags & FSL_UPM_WAIT_WRITE_BUFFER) + fun_wait(fun); } static void nand_read_buf(struct mtd_info *mtd, u_char *buf, int len) @@ -125,7 +172,7 @@ static int nand_dev_ready(struct mtd_info *mtd) struct nand_chip *chip = mtd->priv; struct fsl_upm_nand *fun = chip->priv; - return fun->dev_ready(); + return fun->dev_ready(fun->chip_nr); } int fsl_upm_nand_init(struct nand_chip *chip, struct fsl_upm_nand *fun) @@ -139,6 +186,9 @@ int fsl_upm_nand_init(struct nand_chip *chip, struct fsl_upm_nand *fun) chip->chip_delay = fun->chip_delay; chip->ecc.mode = NAND_ECC_SOFT; chip->cmd_ctrl = fun_cmd_ctrl; +#if CONFIG_SYS_NAND_MAX_CHIPS > 1 + chip->select_chip = fun_select_chip; +#endif chip->read_byte = nand_read_byte; chip->read_buf = nand_read_buf; chip->write_buf = nand_write_buf; diff --git a/drivers/mtd/nand/nand.c b/drivers/mtd/nand/nand.c index 70b605f..9d83794 100644 --- a/drivers/mtd/nand/nand.c +++ b/drivers/mtd/nand/nand.c @@ -41,11 +41,15 @@ static const char default_nand_name[] = "nand"; static void nand_init_chip(struct mtd_info *mtd, struct nand_chip *nand, ulong base_addr) { + int maxchips = CONFIG_SYS_NAND_MAX_CHIPS; + + if (maxchips < 1) + maxchips = 1; mtd->priv = nand; nand->IO_ADDR_R = nand->IO_ADDR_W = (void __iomem *)base_addr; if (board_nand_init(nand) == 0) { - if (nand_scan(mtd, 1) == 0) { + if (nand_scan(mtd, maxchips) == 0) { if (!mtd->name) mtd->name = (char *)default_nand_name; else diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index d33fee2..e6ac859 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -2652,8 +2652,10 @@ int nand_scan_ident(struct mtd_info *mtd, int maxchips) type->id != chip->read_byte(mtd)) break; } +#ifdef DEBUG if (i > 1) printk(KERN_INFO "%d NAND chips detected\n", i); +#endif /* Store the number of chips and calc total size for mtd */ chip->numchips = i; |