diff options
Diffstat (limited to 'u-boot/board/freescale/mpc8360erdk/nand.c')
| -rw-r--r-- | u-boot/board/freescale/mpc8360erdk/nand.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/u-boot/board/freescale/mpc8360erdk/nand.c b/u-boot/board/freescale/mpc8360erdk/nand.c new file mode 100644 index 0000000..92d56a3 --- /dev/null +++ b/u-boot/board/freescale/mpc8360erdk/nand.c @@ -0,0 +1,92 @@ +/* + * MPC8360E-RDK support for the NAND on FSL UPM + * + * Copyright (C) 2007 MontaVista Software, Inc. + * Anton Vorontsov <avorontsov@ru.mvista.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + */ + +#include <config.h> +#include <common.h> +#include <asm/io.h> +#include <asm/immap_83xx.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/fsl_upm.h> +#include <nand.h> + +static struct immap *im = (struct immap *)CONFIG_SYS_IMMR; + +static const u32 upm_array[] = { + 0x0ff03c30, 0x0ff03c30, 0x0ff03c34, 0x0ff33c30, /* Words 0 to 3 */ + 0xfff33c31, 0xfffffc30, 0xfffffc30, 0xfffffc30, /* Words 4 to 7 */ + 0x0faf3c30, 0x0faf3c30, 0x0faf3c30, 0x0fff3c34, /* Words 8 to 11 */ + 0xffff3c31, 0xfffffc30, 0xfffffc30, 0xfffffc30, /* Words 12 to 15 */ + 0x0fa3fc30, 0x0fa3fc30, 0x0fa3fc30, 0x0ff3fc34, /* Words 16 to 19 */ + 0xfff3fc31, 0xfffffc30, 0xfffffc30, 0xfffffc30, /* Words 20 to 23 */ + 0x0ff33c30, 0x0fa33c30, 0x0fa33c34, 0x0ff33c30, /* Words 24 to 27 */ + 0xfff33c31, 0xfff0fc30, 0xfff0fc30, 0xfff0fc30, /* Words 28 to 31 */ + 0xfff3fc30, 0xfff3fc30, 0xfff6fc30, 0xfffcfc30, /* Words 32 to 35 */ + 0xfffcfc30, 0xfffcfc30, 0xfffcfc30, 0xfffcfc30, /* Words 36 to 39 */ + 0xfffcfc30, 0xfffcfc30, 0xfffcfc30, 0xfffcfc30, /* Words 40 to 43 */ + 0xfffdfc30, 0xfffffc30, 0xfffffc30, 0xfffffc31, /* Words 44 to 47 */ + 0xfffffc30, 0xfffffc00, 0xfffffc00, 0xfffffc00, /* Words 48 to 51 */ + 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00, /* Words 52 to 55 */ + 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01, /* Words 56 to 59 */ + 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01, /* Words 60 to 63 */ +}; + +static void upm_setup(struct fsl_upm *upm) +{ + int i; + + /* write upm array */ + out_be32(upm->mxmr, MxMR_OP_WARR); + + for (i = 0; i < 64; i++) { + out_be32(upm->mdr, upm_array[i]); + out_8(upm->io_addr, 0x0); + } + + /* normal operation */ + out_be32(upm->mxmr, MxMR_OP_NORM); + while (in_be32(upm->mxmr) != MxMR_OP_NORM) + eieio(); +} + +static int dev_ready(int chip_nr) +{ + if (in_be32(&im->qepio.ioport[4].pdat) & 0x00002000) { + debug("nand ready\n"); + return 1; + } + + debug("nand busy\n"); + return 0; +} + +static struct fsl_upm_nand fun = { + .upm = { + .io_addr = (void *)CONFIG_SYS_NAND_BASE, + }, + .width = 8, + .upm_cmd_offset = 8, + .upm_addr_offset = 16, + .dev_ready = dev_ready, + .wait_flags = FSL_UPM_WAIT_RUN_PATTERN, + .chip_delay = 50, +}; + +int board_nand_init(struct nand_chip *nand) +{ + fun.upm.mxmr = &im->im_lbc.mamr; + fun.upm.mdr = &im->im_lbc.mdr; + fun.upm.mar = &im->im_lbc.mar; + + upm_setup(&fun.upm); + + return fsl_upm_nand_init(nand, &fun); +} |