From: Dipen Dudhat Dipen.Dudhat@freescale.com

Add NAND support (including spl) on IFC, such as is found on the p1010.

Note that using hardware ECC on IFC with small-page NAND (which is what comes on the p1010rdb reference board) means there will be insufficient OOB space for JFFS2, since IFC does not support 1-bit ECC. UBI should work, as it does not use OOB for anything but ECC.

When hardware ECC is not enabled in CSOR, software ECC is now used.

Signed-off-by: Dipen Dudhat Dipen.Dudhat@freescale.com [scottwood@freescale.com: ECC rework and misc fixes] Signed-off-by: Scott Wood scottwood@freescale.com --- arch/powerpc/cpu/mpc85xx/cpu_init_nand.c | 10 + arch/powerpc/cpu/mpc85xx/u-boot-nand_spl.lds | 18 +- arch/powerpc/include/asm/fsl_ifc.h | 6 +- drivers/mtd/nand/Makefile | 1 + drivers/mtd/nand/fsl_ifc_nand.c | 850 ++++++++++++++++++++++++++ nand_spl/nand_boot_fsl_ifc.c | 268 ++++++++ 6 files changed, 1146 insertions(+), 7 deletions(-) create mode 100644 drivers/mtd/nand/fsl_ifc_nand.c create mode 100644 nand_spl/nand_boot_fsl_ifc.c

diff --git a/arch/powerpc/cpu/mpc85xx/cpu_init_nand.c b/arch/powerpc/cpu/mpc85xx/cpu_init_nand.c index 796d398..6d01479 100644 --- a/arch/powerpc/cpu/mpc85xx/cpu_init_nand.c +++ b/arch/powerpc/cpu/mpc85xx/cpu_init_nand.c @@ -21,10 +21,12 @@ */

#include <common.h> +#include <asm/fsl_ifc.h> #include <asm/io.h>

void cpu_init_f(void) { +#ifdef CONFIG_FSL_LBC fsl_lbc_t *lbc = LBC_BASE_ADDR;

/* @@ -39,6 +41,14 @@ void cpu_init_f(void) #else #error CONFIG_SYS_NAND_BR_PRELIM, CONFIG_SYS_NAND_OR_PRELIM must be defined #endif +#endif +#ifdef CONFIG_FSL_IFC +#if defined(CONFIG_SYS_CSPR0) && defined(CONFIG_SYS_CSOR0) + set_ifc_cspr(IFC_CS0, CONFIG_SYS_CSPR0); + set_ifc_amask(IFC_CS0, CONFIG_SYS_AMASK0); + set_ifc_csor(IFC_CS0, CONFIG_SYS_CSOR0); +#endif +#endif

#if defined(CONFIG_SYS_RAMBOOT) && defined(CONFIG_SYS_INIT_L2_ADDR) ccsr_l2cache_t *l2cache = (void *)CONFIG_SYS_MPC85xx_L2_ADDR; diff --git a/arch/powerpc/cpu/mpc85xx/u-boot-nand_spl.lds b/arch/powerpc/cpu/mpc85xx/u-boot-nand_spl.lds index 8410bd7..852f9aa 100644 --- a/arch/powerpc/cpu/mpc85xx/u-boot-nand_spl.lds +++ b/arch/powerpc/cpu/mpc85xx/u-boot-nand_spl.lds @@ -23,6 +23,8 @@ * MA 02111-1307 USA */

+#include "config.h" /* CONFIG_BOARDDIR */ + OUTPUT_ARCH(powerpc) SECTIONS { @@ -52,8 +54,18 @@ SECTIONS . = ALIGN(8); __init_begin = .; __init_end = .; - - .resetvec ADDR(.text) + 0xffc : { +#if defined(CONFIG_FSL_IFC) /* Restrict bootpg at 4K boundry for IFC */ + .bootpg ADDR(.text) + 0x1000 : + { + start.o (.bootpg) + } +#define RESET_VECTOR_OFFSET 0x1ffc /* IFC has 8K sram */ +#elif defined(CONFIG_FSL_ELBC) +#define RESET_VECTOR_OFFSET 0xffc /* LBC has 4k sram */ +#else +#error unknown NAND controller +#endif + .resetvec ADDR(.text) + RESET_VECTOR_OFFSET : { KEEP(*(.resetvec)) } = 0xffff

@@ -64,4 +76,4 @@ SECTIONS } __bss_end__ = .; } -ASSERT(__init_end <= 0xfff00ffc, "NAND bootstrap too big"); +ASSERT(__init_end <= (0xfff00000 + RESET_VECTOR_OFFSET), "NAND bootstrap too big"); diff --git a/arch/powerpc/include/asm/fsl_ifc.h b/arch/powerpc/include/asm/fsl_ifc.h index d4d9809..fb12363 100644 --- a/arch/powerpc/include/asm/fsl_ifc.h +++ b/arch/powerpc/include/asm/fsl_ifc.h @@ -69,6 +69,7 @@ */ /* Enable ECC Encoder */ #define CSOR_NAND_ECC_ENC_EN 0x80000000 +#define CSOR_NAND_ECC_MODE_MASK 0x30000000 /* 4 bit correction per 520 Byte sector */ #define CSOR_NAND_ECC_MODE_4 0x00000000 /* 8 bit correction per 528 Byte sector */ @@ -857,10 +858,7 @@ struct fsl_ifc_nand { u32 res19[0x10]; u32 nand_fsr; u32 res20; - u32 nand_eccstat0; - u32 nand_eccstat1; - u32 nand_eccstat2; - u32 nand_eccstat3; + u32 nand_eccstat[4]; u32 res21[0x20]; u32 nanndcr; u32 res22[0x2]; diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile index 8b598f6..3353dcd 100644 --- a/drivers/mtd/nand/Makefile +++ b/drivers/mtd/nand/Makefile @@ -37,6 +37,7 @@ COBJS-$(CONFIG_NAND_ATMEL) += atmel_nand.o COBJS-$(CONFIG_DRIVER_NAND_BFIN) += bfin_nand.o COBJS-$(CONFIG_NAND_DAVINCI) += davinci_nand.o COBJS-$(CONFIG_NAND_FSL_ELBC) += fsl_elbc_nand.o +COBJS-$(CONFIG_NAND_FSL_IFC) += fsl_ifc_nand.o COBJS-$(CONFIG_NAND_FSL_UPM) += fsl_upm.o COBJS-$(CONFIG_NAND_KB9202) += kb9202_nand.o COBJS-$(CONFIG_NAND_KIRKWOOD) += kirkwood_nand.o diff --git a/drivers/mtd/nand/fsl_ifc_nand.c b/drivers/mtd/nand/fsl_ifc_nand.c new file mode 100644 index 0000000..b3f3c3c --- /dev/null +++ b/drivers/mtd/nand/fsl_ifc_nand.c @@ -0,0 +1,850 @@ +/* Integrated Flash Controller NAND Machine Driver + * + * Copyright (c) 2011 Freescale Semiconductor, Inc + * + * Authors: Dipen Dudhat Dipen.Dudhat@freescale.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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <common.h> +#include <malloc.h> + +#include <linux/mtd/mtd.h> +#include <linux/mtd/nand.h> +#include <linux/mtd/nand_ecc.h> + +#include <asm/io.h> +#include <asm/errno.h> +#include <asm/fsl_ifc.h> + +#define MAX_BANKS 4 +#define ERR_BYTE 0xFF /* Value returned for read bytes + when read failed */ +#define IFC_TIMEOUT_MSECS 10 /* Maximum number of mSecs to wait for IFC + NAND Machine */ + +struct fsl_ifc_ctrl; + +/* mtd information per set */ +struct fsl_ifc_mtd { + struct mtd_info mtd; + struct nand_chip chip; + struct fsl_ifc_ctrl *ctrl; + + struct device *dev; + int bank; /* Chip select bank number */ + unsigned int bufnum_mask; /* bufnum = page & bufnum_mask */ + u8 __iomem *vbase; /* Chip select base virtual address */ +}; + +/* overview of the fsl ifc controller */ +struct fsl_ifc_ctrl { + struct nand_hw_control controller; + struct fsl_ifc_mtd *chips[MAX_BANKS]; + + /* device info */ + struct fsl_ifc *regs; + uint8_t __iomem *addr; /* Address of assigned IFC buffer */ + unsigned int cs_nand; /* On which chipsel NAND is connected */ + unsigned int page; /* Last page written to / read from */ + unsigned int read_bytes; /* Number of bytes read during command */ + unsigned int column; /* Saved column from SEQIN */ + unsigned int index; /* Pointer to next byte to 'read' */ + unsigned int status; /* status read from NEESR after last op */ + unsigned int oob; /* Non zero if operating on OOB data */ + unsigned int eccread; /* Non zero for a full-page ECC read */ +}; + +static struct fsl_ifc_ctrl *ifc_ctrl; + +/* 512-byte page with 4-bit ECC, 8-bit */ +static struct nand_ecclayout oob_512_8bit_ecc4 = { + .eccbytes = 8, + .eccpos = {8, 9, 10, 11, 12, 13, 14, 15}, + .oobfree = { {0, 5}, {6, 2} }, +}; + +/* 512-byte page with 4-bit ECC, 16-bit */ +static struct nand_ecclayout oob_512_16bit_ecc4 = { + .eccbytes = 8, + .eccpos = {8, 9, 10, 11, 12, 13, 14, 15}, + .oobfree = { {2, 6}, }, +}; + +/* 2048-byte page size with 4-bit ECC */ +static struct nand_ecclayout oob_2048_ecc4 = { + .eccbytes = 32, + .eccpos = { + 8, 9, 10, 11, 12, 13, 14, 15, + 16, 17, 18, 19, 20, 21, 22, 23, + 24, 25, 26, 27, 28, 29, 30, 31, + 32, 33, 34, 35, 36, 37, 38, 39, + }, + .oobfree = { {2, 6}, {40, 24} }, +}; + +/* 4096-byte page size with 4-bit ECC */ +static struct nand_ecclayout oob_4096_ecc4 = { + .eccbytes = 64, + .eccpos = { + 8, 9, 10, 11, 12, 13, 14, 15, + 16, 17, 18, 19, 20, 21, 22, 23, + 24, 25, 26, 27, 28, 29, 30, 31, + 32, 33, 34, 35, 36, 37, 38, 39, + 40, 41, 42, 43, 44, 45, 46, 47, + 48, 49, 50, 51, 52, 53, 54, 55, + 56, 57, 58, 59, 60, 61, 62, 63, + 64, 65, 66, 67, 68, 69, 70, 71, + }, + .oobfree = { {2, 6}, {72, 56} }, +}; + +/* 4096-byte page size with 8-bit ECC -- requires 218-byte OOB */ +static struct nand_ecclayout oob_4096_ecc8 = { + .eccbytes = 128, + .eccpos = { + 8, 9, 10, 11, 12, 13, 14, 15, + 16, 17, 18, 19, 20, 21, 22, 23, + 24, 25, 26, 27, 28, 29, 30, 31, + 32, 33, 34, 35, 36, 37, 38, 39, + 40, 41, 42, 43, 44, 45, 46, 47, + 48, 49, 50, 51, 52, 53, 54, 55, + 56, 57, 58, 59, 60, 61, 62, 63, + 64, 65, 66, 67, 68, 69, 70, 71, + 72, 73, 74, 75, 76, 77, 78, 79, + 80, 81, 82, 83, 84, 85, 86, 87, + 88, 89, 90, 91, 92, 93, 94, 95, + 96, 97, 98, 99, 100, 101, 102, 103, + 104, 105, 106, 107, 108, 109, 110, 111, + 112, 113, 114, 115, 116, 117, 118, 119, + 120, 121, 122, 123, 124, 125, 126, 127, + 128, 129, 130, 131, 132, 133, 134, 135, + }, + .oobfree = { {2, 6}, {136, 82} }, +}; + + +/* + * Generic flash bbt descriptors + */ +static u8 bbt_pattern[] = {'B', 'b', 't', '0' }; +static u8 mirror_pattern[] = {'1', 't', 'b', 'B' }; + +static struct nand_bbt_descr bbt_main_descr = { + .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE | + NAND_BBT_2BIT | NAND_BBT_VERSION, + .offs = 2, /* 0 on 8-bit small page */ + .len = 4, + .veroffs = 6, + .maxblocks = 4, + .pattern = bbt_pattern, +}; + +static struct nand_bbt_descr bbt_mirror_descr = { + .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE | + NAND_BBT_2BIT | NAND_BBT_VERSION, + .offs = 2, /* 0 on 8-bit small page */ + .len = 4, + .veroffs = 6, + .maxblocks = 4, + .pattern = mirror_pattern, +}; + +/* + * Set up the IFC hardware block and page address fields, and the ifc nand + * structure addr field to point to the correct IFC buffer in memory + */ +static void set_addr(struct mtd_info *mtd, int column, int page_addr, int oob) +{ + struct nand_chip *chip = mtd->priv; + struct fsl_ifc_mtd *priv = chip->priv; + struct fsl_ifc_ctrl *ctrl = priv->ctrl; + struct fsl_ifc *ifc = ctrl->regs; + int buf_num; + + ctrl->page = page_addr; + + /* Program ROW0/COL0 */ + out_be32(&ifc->ifc_nand.row0, page_addr); + out_be32(&ifc->ifc_nand.col0, (oob ? IFC_NAND_COL_MS : 0) | column); + + buf_num = page_addr & priv->bufnum_mask; + + ctrl->addr = priv->vbase + buf_num * (mtd->writesize * 2); + ctrl->index = column; + + /* for OOB data point to the second half of the buffer */ + if (oob) + ctrl->index += mtd->writesize; +} + +static int is_blank(struct mtd_info *mtd, struct fsl_ifc_ctrl *ctrl, + unsigned int bufnum) +{ + struct nand_chip *chip = mtd->priv; + struct fsl_ifc_mtd *priv = chip->priv; + u8 __iomem *addr = priv->vbase + bufnum * (mtd->writesize * 2); + u32 __iomem *main = (u32 *)addr; + u8 __iomem *oob = addr + mtd->writesize; + int i; + + for (i = 0; i < mtd->writesize / 4; i++) { + if (__raw_readl(&main[i]) != 0xffffffff) + return 0; + } + + for (i = 0; i < chip->ecc.layout->eccbytes; i++) { + int pos = chip->ecc.layout->eccpos[i]; + + if (__raw_readb(&oob[pos]) != 0xff) + return 0; + } + + return 1; +} + +/* returns nonzero if entire page is blank */ +static int check_read_ecc(struct mtd_info *mtd, struct fsl_ifc_ctrl *ctrl, + u32 *eccstat, unsigned int bufnum) +{ + u32 reg = eccstat[bufnum / 4]; + int errors = (reg >> ((3 - bufnum % 4) * 8)) & 15; + + if (errors == 15) { /* uncorrectable */ + /* Blank pages fail hw ECC checks */ + if (is_blank(mtd, ctrl, bufnum)) + return 1; + + /* + * We disable ECCER reporting in hardware due to + * erratum IFC-A002770 -- so report it now if we + * see an uncorrectable error in ECCSTAT. + */ + ctrl->status |= IFC_NAND_EVTER_STAT_ECCER; + } else if (errors > 0) { + mtd->ecc_stats.corrected += errors; + } + + return 0; +} + +/* + * execute IFC NAND command and wait for it to complete + */ +static int fsl_ifc_run_command(struct mtd_info *mtd) +{ + struct nand_chip *chip = mtd->priv; + struct fsl_ifc_mtd *priv = chip->priv; + struct fsl_ifc_ctrl *ctrl = priv->ctrl; + struct fsl_ifc *ifc = ctrl->regs; + long long end_tick; + u32 eccstat[4]; + int i; + + /* set the chip select for NAND Transaction */ + out_be32(&ifc->ifc_nand.nand_csel, ifc_ctrl->cs_nand); + + /* start read/write 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()) { + ctrl->status = in_be32(&ifc->ifc_nand.nand_evter_stat); + + if (ctrl->status & IFC_NAND_EVTER_STAT_OPC) + break; + } + + out_be32(&ifc->ifc_nand.nand_evter_stat, ctrl->status); + + if (ctrl->status & IFC_NAND_EVTER_STAT_FTOER) + printf("%s: Flash Time Out Error\n", __func__); + if (ctrl->status & IFC_NAND_EVTER_STAT_WPER) + printf("%s: Write Protect Error\n", __func__); + + if (ctrl->eccread) { + int bufperpage = mtd->writesize / 512; + int bufnum = (ctrl->page & priv->bufnum_mask) * bufperpage; + int bufnum_end = bufnum + bufperpage - 1; + + for (i = bufnum / 4; i <= bufnum_end / 4; i++) + eccstat[i] = in_be32(&ifc->ifc_nand.nand_eccstat[i]); + + for (i = bufnum; i <= bufnum_end; i++) { + if (check_read_ecc(mtd, ctrl, eccstat, i)) + break; + } + + ctrl->eccread = 0; + } + + /* returns 0 on success otherwise non-zero) */ + return ctrl->status == IFC_NAND_EVTER_STAT_OPC ? 0 : -EIO; +} + +static void fsl_ifc_do_read(struct nand_chip *chip, + int oob, + struct mtd_info *mtd) +{ + struct fsl_ifc_mtd *priv = chip->priv; + struct fsl_ifc_ctrl *ctrl = priv->ctrl; + struct fsl_ifc *ifc = ctrl->regs; + + /* Program FIR/IFC_NAND_FCR0 for Small/Large page */ + if (mtd->writesize > 512) { + out_be32(&ifc->ifc_nand.nand_fir0, + (IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) | + (IFC_FIR_OP_CA0 << IFC_NAND_FIR0_OP1_SHIFT) | + (IFC_FIR_OP_RA0 << IFC_NAND_FIR0_OP2_SHIFT) | + (IFC_FIR_OP_CMD1 << IFC_NAND_FIR0_OP3_SHIFT) | + (IFC_FIR_OP_RBCD << IFC_NAND_FIR0_OP4_SHIFT)); + out_be32(&ifc->ifc_nand.nand_fir1, 0x0); + + out_be32(&ifc->ifc_nand.nand_fcr0, + (NAND_CMD_READ0 << IFC_NAND_FCR0_CMD0_SHIFT) | + (NAND_CMD_READSTART << IFC_NAND_FCR0_CMD1_SHIFT)); + } else { + out_be32(&ifc->ifc_nand.nand_fir0, + (IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) | + (IFC_FIR_OP_CA0 << IFC_NAND_FIR0_OP1_SHIFT) | + (IFC_FIR_OP_RA0 << IFC_NAND_FIR0_OP2_SHIFT) | + (IFC_FIR_OP_RBCD << IFC_NAND_FIR0_OP3_SHIFT)); + + if (oob) + out_be32(&ifc->ifc_nand.nand_fcr0, + NAND_CMD_READOOB << IFC_NAND_FCR0_CMD0_SHIFT); + else + out_be32(&ifc->ifc_nand.nand_fcr0, + NAND_CMD_READ0 << IFC_NAND_FCR0_CMD0_SHIFT); + } +} + +/* cmdfunc send commands to the IFC NAND Machine */ +static void fsl_ifc_cmdfunc(struct mtd_info *mtd, unsigned int command, + int column, int page_addr) +{ + struct nand_chip *chip = mtd->priv; + struct fsl_ifc_mtd *priv = chip->priv; + struct fsl_ifc_ctrl *ctrl = priv->ctrl; + struct fsl_ifc *ifc = ctrl->regs; + + /* clear the read buffer */ + ctrl->read_bytes = 0; + if (command != NAND_CMD_PAGEPROG) + ctrl->index = 0; + + switch (command) { + /* READ0 read the entire buffer to use hardware ECC. */ + case NAND_CMD_READ0: { + out_be32(&ifc->ifc_nand.nand_fbcr, 0); + set_addr(mtd, 0, page_addr, 0); + + ctrl->read_bytes = mtd->writesize + mtd->oobsize; + ctrl->index += column; + + if (chip->ecc.mode == NAND_ECC_HW) + ctrl->eccread = 1; + + fsl_ifc_do_read(chip, 0, mtd); + fsl_ifc_run_command(mtd); + return; + } + + /* READOOB reads only the OOB because no ECC is performed. */ + case NAND_CMD_READOOB: + out_be32(&ifc->ifc_nand.nand_fbcr, mtd->oobsize - column); + set_addr(mtd, column, page_addr, 1); + + ctrl->read_bytes = mtd->writesize + mtd->oobsize; + + fsl_ifc_do_read(chip, 1, mtd); + fsl_ifc_run_command(mtd); + + return; + + /* READID must read all possible bytes while CEB is active */ + case NAND_CMD_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); + /* 4 bytes for manuf, device and exts */ + out_be32(&ifc->ifc_nand.nand_fbcr, 4); + ctrl->read_bytes = 4; + + set_addr(mtd, 0, 0, 0); + fsl_ifc_run_command(mtd); + return; + + /* ERASE1 stores the block and page address */ + case NAND_CMD_ERASE1: + set_addr(mtd, 0, page_addr, 0); + return; + + /* ERASE2 uses the block and page address from ERASE1 */ + case NAND_CMD_ERASE2: + out_be32(&ifc->ifc_nand.nand_fir0, + (IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) | + (IFC_FIR_OP_RA0 << IFC_NAND_FIR0_OP1_SHIFT) | + (IFC_FIR_OP_CMD1 << IFC_NAND_FIR0_OP2_SHIFT)); + + out_be32(&ifc->ifc_nand.nand_fcr0, + (NAND_CMD_ERASE1 << IFC_NAND_FCR0_CMD0_SHIFT) | + (NAND_CMD_ERASE2 << IFC_NAND_FCR0_CMD1_SHIFT)); + + out_be32(&ifc->ifc_nand.nand_fbcr, 0); + ctrl->read_bytes = 0; + fsl_ifc_run_command(mtd); + return; + + /* SEQIN sets up the addr buffer and all registers except the length */ + case NAND_CMD_SEQIN: { + u32 nand_fcr0; + ctrl->column = column; + ctrl->oob = 0; + + if (mtd->writesize > 512) { + nand_fcr0 = + (NAND_CMD_SEQIN << IFC_NAND_FCR0_CMD0_SHIFT) | + (NAND_CMD_PAGEPROG << IFC_NAND_FCR0_CMD1_SHIFT); + + out_be32(&ifc->ifc_nand.nand_fir0, + (IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) | + (IFC_FIR_OP_CA0 << IFC_NAND_FIR0_OP1_SHIFT) | + (IFC_FIR_OP_RA0 << IFC_NAND_FIR0_OP2_SHIFT) | + (IFC_FIR_OP_WBCD << IFC_NAND_FIR0_OP3_SHIFT) | + (IFC_FIR_OP_CW1 << IFC_NAND_FIR0_OP4_SHIFT)); + out_be32(&ifc->ifc_nand.nand_fir1, 0); + } else { + nand_fcr0 = ((NAND_CMD_PAGEPROG << + IFC_NAND_FCR0_CMD1_SHIFT) | + (NAND_CMD_SEQIN << + IFC_NAND_FCR0_CMD2_SHIFT)); + + out_be32(&ifc->ifc_nand.nand_fir0, + (IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) | + (IFC_FIR_OP_CMD2 << IFC_NAND_FIR0_OP1_SHIFT) | + (IFC_FIR_OP_CA0 << IFC_NAND_FIR0_OP2_SHIFT) | + (IFC_FIR_OP_RA0 << IFC_NAND_FIR0_OP3_SHIFT) | + (IFC_FIR_OP_WBCD << IFC_NAND_FIR0_OP4_SHIFT)); + out_be32(&ifc->ifc_nand.nand_fir1, + (IFC_FIR_OP_CW1 << IFC_NAND_FIR1_OP5_SHIFT)); + + if (column >= mtd->writesize) { + /* OOB area --> READOOB */ + column -= mtd->writesize; + nand_fcr0 |= NAND_CMD_READOOB << + IFC_NAND_FCR0_CMD0_SHIFT; + ctrl->oob = 1; + } else if (column < 256) { + /* First 256 bytes --> READ0 */ + nand_fcr0 |= NAND_CMD_READ0 << FCR_CMD0_SHIFT; + } else { + /* Second 256 bytes --> READ1 */ + nand_fcr0 |= NAND_CMD_READ1 << FCR_CMD0_SHIFT; + } + } + + out_be32(&ifc->ifc_nand.nand_fcr0, nand_fcr0); + set_addr(mtd, column, page_addr, ctrl->oob); + return; + } + + /* PAGEPROG reuses all of the setup from SEQIN and adds the length */ + case NAND_CMD_PAGEPROG: + if (ctrl->oob) + out_be32(&ifc->ifc_nand.nand_fbcr, ctrl->index); + else + out_be32(&ifc->ifc_nand.nand_fbcr, 0); + + fsl_ifc_run_command(mtd); + return; + + case NAND_CMD_STATUS: + out_be32(&ifc->ifc_nand.nand_fir0, + (IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) | + (IFC_FIR_OP_RB << IFC_NAND_FIR0_OP1_SHIFT)); + out_be32(&ifc->ifc_nand.nand_fcr0, + NAND_CMD_STATUS << IFC_NAND_FCR0_CMD0_SHIFT); + out_be32(&ifc->ifc_nand.nand_fbcr, 1); + set_addr(mtd, 0, 0, 0); + ctrl->read_bytes = 1; + + fsl_ifc_run_command(mtd); + + /* Chip sometimes reporting write protect even when it's not */ + out_8(ctrl->addr, in_8(ctrl->addr) | NAND_STATUS_WP); + return; + + case NAND_CMD_RESET: + out_be32(&ifc->ifc_nand.nand_fir0, + IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT); + out_be32(&ifc->ifc_nand.nand_fcr0, + NAND_CMD_RESET << IFC_NAND_FCR0_CMD0_SHIFT); + fsl_ifc_run_command(mtd); + return; + + default: + printf("%s: error, unsupported command 0x%x.\n", + __func__, command); + } +} + +/* + * Write buf to the IFC NAND Controller Data Buffer + */ +static void fsl_ifc_write_buf(struct mtd_info *mtd, const u8 *buf, int len) +{ + struct nand_chip *chip = mtd->priv; + struct fsl_ifc_mtd *priv = chip->priv; + struct fsl_ifc_ctrl *ctrl = priv->ctrl; + unsigned int bufsize = mtd->writesize + mtd->oobsize; + + if (len <= 0) { + printf("%s of %d bytes", __func__, len); + ctrl->status = 0; + return; + } + + if ((unsigned int)len > bufsize - ctrl->index) { + printf("%s beyond end of buffer " + "(%d requested, %u available)\n", + __func__, len, bufsize - ctrl->index); + len = bufsize - ctrl->index; + } + + memcpy_toio(&ctrl->addr[ctrl->index], buf, len); + ctrl->index += len; +} + +/* + * read a byte from either the IFC hardware buffer if it has any data left + * otherwise issue a command to read a single byte. + */ +static u8 fsl_ifc_read_byte(struct mtd_info *mtd) +{ + struct nand_chip *chip = mtd->priv; + struct fsl_ifc_mtd *priv = chip->priv; + struct fsl_ifc_ctrl *ctrl = priv->ctrl; + + /* If there are still bytes in the IFC buffer, then use the + * next byte. */ + if (ctrl->index < ctrl->read_bytes) + return in_8(&ctrl->addr[ctrl->index++]); + + printf("%s beyond end of buffer\n", __func__); + return ERR_BYTE; +} + +/* + * Read two bytes from the IFC hardware buffer + * read function for 16-bit buswith + */ +static uint8_t fsl_ifc_read_byte16(struct mtd_info *mtd) +{ + struct nand_chip *chip = mtd->priv; + struct fsl_ifc_mtd *priv = chip->priv; + struct fsl_ifc_ctrl *ctrl = priv->ctrl; + uint16_t data; + + /* + * If there are still bytes in the IFC buffer, then use the + * next byte. + */ + if (ctrl->index < ctrl->read_bytes) { + data = in_be16((uint16_t *)&ctrl-> + addr[ctrl->index]); + ctrl->index += 2; + return (uint8_t)data; + } + + printf("%s beyond end of buffer\n", __func__); + return ERR_BYTE; +} + +/* + * Read from the IFC Controller Data Buffer + */ +static void fsl_ifc_read_buf(struct mtd_info *mtd, u8 *buf, int len) +{ + struct nand_chip *chip = mtd->priv; + struct fsl_ifc_mtd *priv = chip->priv; + struct fsl_ifc_ctrl *ctrl = priv->ctrl; + int avail; + + if (len < 0) + return; + + avail = min((unsigned int)len, ctrl->read_bytes - ctrl->index); + memcpy_fromio(buf, &ctrl->addr[ctrl->index], avail); + ctrl->index += avail; + + if (len > avail) + printf("%s beyond end of buffer " + "(%d requested, %d available)\n", + __func__, len, avail); +} + +/* + * Verify buffer against the IFC Controller Data Buffer + */ +static int fsl_ifc_verify_buf(struct mtd_info *mtd, + const u_char *buf, int len) +{ + struct nand_chip *chip = mtd->priv; + struct fsl_ifc_mtd *priv = chip->priv; + struct fsl_ifc_ctrl *ctrl = priv->ctrl; + int i; + + if (len < 0) { + printf("%s of %d bytes", __func__, len); + return -EINVAL; + } + + if ((unsigned int)len > ctrl->read_bytes - ctrl->index) { + printf("%s beyond end of buffer " + "(%d requested, %u available)\n", + __func__, len, ctrl->read_bytes - ctrl->index); + + ctrl->index = ctrl->read_bytes; + return -EINVAL; + } + + for (i = 0; i < len; i++) + if (in_8(&ctrl->addr[ctrl->index + i]) != buf[i]) + break; + + ctrl->index += len; + return i == len && ctrl->status == IFC_NAND_EVTER_STAT_OPC ? 0 : -EIO; +} + +/* This function is called after Program and Erase Operations to + * check for success or failure. + */ +static int fsl_ifc_wait(struct mtd_info *mtd, struct nand_chip *chip) +{ + struct fsl_ifc_mtd *priv = chip->priv; + struct fsl_ifc_ctrl *ctrl = priv->ctrl; + struct fsl_ifc *ifc = ctrl->regs; + u32 nand_fsr; + + if (ctrl->status != IFC_NAND_EVTER_STAT_OPC) + return NAND_STATUS_FAIL; + + /* Use READ_STATUS command, but wait for the device to be ready */ + out_be32(&ifc->ifc_nand.nand_fir0, + (IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) | + (IFC_FIR_OP_RDSTAT << IFC_NAND_FIR0_OP1_SHIFT)); + out_be32(&ifc->ifc_nand.nand_fcr0, NAND_CMD_STATUS << + IFC_NAND_FCR0_CMD0_SHIFT); + out_be32(&ifc->ifc_nand.nand_fbcr, 1); + set_addr(mtd, 0, 0, 0); + ctrl->read_bytes = 1; + + fsl_ifc_run_command(mtd); + + if (ctrl->status != IFC_NAND_EVTER_STAT_OPC) + return NAND_STATUS_FAIL; + + nand_fsr = in_be32(&ifc->ifc_nand.nand_fsr); + + /* Chip sometimes reporting write protect even when it's not */ + nand_fsr = nand_fsr | NAND_STATUS_WP; + return nand_fsr; +} + +static int fsl_ifc_read_page(struct mtd_info *mtd, + struct nand_chip *chip, + uint8_t *buf, int page) +{ + struct fsl_ifc_mtd *priv = chip->priv; + struct fsl_ifc_ctrl *ctrl = priv->ctrl; + + fsl_ifc_read_buf(mtd, buf, mtd->writesize); + fsl_ifc_read_buf(mtd, chip->oob_poi, mtd->oobsize); + + if (ctrl->status != IFC_NAND_EVTER_STAT_OPC) + mtd->ecc_stats.failed++; + + return 0; +} + +/* ECC will be calculated automatically, and errors will be detected in + * waitfunc. + */ +static void fsl_ifc_write_page(struct mtd_info *mtd, + struct nand_chip *chip, + const uint8_t *buf) +{ + fsl_ifc_write_buf(mtd, buf, mtd->writesize); + fsl_ifc_write_buf(mtd, chip->oob_poi, mtd->oobsize); +} + +static void fsl_ifc_ctrl_init(void) +{ + ifc_ctrl = kzalloc(sizeof(*ifc_ctrl), GFP_KERNEL); + if (!ifc_ctrl) + return; + + ifc_ctrl->regs = IFC_BASE_ADDR; + + /* clear event registers */ + out_be32(&ifc_ctrl->regs->ifc_nand.nand_evter_stat, ~0U); + out_be32(&ifc_ctrl->regs->ifc_nand.pgrdcmpl_evt_stat, ~0U); + + /* Enable error and event for any detected errors */ + out_be32(&ifc_ctrl->regs->ifc_nand.nand_evter_en, + IFC_NAND_EVTER_EN_OPC_EN | + IFC_NAND_EVTER_EN_PGRDCMPL_EN | + IFC_NAND_EVTER_EN_FTOER_EN | + IFC_NAND_EVTER_EN_WPER_EN); + + out_be32(&ifc_ctrl->regs->ifc_nand.ncfgr, 0x0); +} + +static void fsl_ifc_select_chip(struct mtd_info *mtd, int chip) +{ +} + +int board_nand_init(struct nand_chip *nand) +{ + struct fsl_ifc_mtd *priv; + struct nand_ecclayout *layout; + uint32_t cspr = 0, csor = 0; + + if (!ifc_ctrl) { + fsl_ifc_ctrl_init(); + if (!ifc_ctrl) + return -1; + } + + priv = kzalloc(sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->ctrl = ifc_ctrl; + priv->vbase = nand->IO_ADDR_R; + + /* Find which chip select it is connected to. + */ + for (priv->bank = 0; priv->bank < MAX_BANKS; priv->bank++) { + phys_addr_t base_addr = virt_to_phys(nand->IO_ADDR_R); + + cspr = in_be32(&ifc_ctrl->regs->cspr_cs[priv->bank].cspr); + csor = in_be32(&ifc_ctrl->regs->csor_cs[priv->bank].csor); + + if ((cspr & CSPR_V) && (cspr & CSPR_MSEL) == CSPR_MSEL_NAND && + (cspr & CSPR_BA) == CSPR_PHYS_ADDR(base_addr)) { + ifc_ctrl->cs_nand = priv->bank << IFC_NAND_CSEL_SHIFT; + break; + } + } + + if (priv->bank >= MAX_BANKS) { + printf("%s: address did not match any " + "chip selects\n", __func__); + return -ENODEV; + } + + ifc_ctrl->chips[priv->bank] = priv; + + /* fill in nand_chip structure */ + /* set up function call table */ + + nand->write_buf = fsl_ifc_write_buf; + nand->read_buf = fsl_ifc_read_buf; + nand->verify_buf = fsl_ifc_verify_buf; + nand->select_chip = fsl_ifc_select_chip; + nand->cmdfunc = fsl_ifc_cmdfunc; + nand->waitfunc = fsl_ifc_wait; + + /* set up nand options */ + nand->bbt_td = &bbt_main_descr; + nand->bbt_md = &bbt_mirror_descr; + + /* set up nand options */ + nand->options = NAND_NO_READRDY | NAND_NO_AUTOINCR | + NAND_USE_FLASH_BBT; + + if (cspr & CSPR_PORT_SIZE_16) { + nand->read_byte = fsl_ifc_read_byte16; + nand->options |= NAND_BUSWIDTH_16; + } else { + nand->read_byte = fsl_ifc_read_byte; + } + + nand->controller = &ifc_ctrl->controller; + nand->priv = priv; + + nand->ecc.read_page = fsl_ifc_read_page; + nand->ecc.write_page = fsl_ifc_write_page; + + /* Hardware generates ECC per 512 Bytes */ + nand->ecc.size = 512; + nand->ecc.bytes = 8; + + switch (csor & CSOR_NAND_PGS_MASK) { + case CSOR_NAND_PGS_512: + if (nand->options & NAND_BUSWIDTH_16) { + layout = &oob_512_16bit_ecc4; + } else { + layout = &oob_512_8bit_ecc4; + + /* Avoid conflict with bad block marker */ + bbt_main_descr.offs = 0; + bbt_mirror_descr.offs = 0; + } + + priv->bufnum_mask = 15; + break; + + case CSOR_NAND_PGS_2K: + layout = &oob_2048_ecc4; + priv->bufnum_mask = 3; + break; + + case CSOR_NAND_PGS_4K: + if ((csor & CSOR_NAND_ECC_MODE_MASK) == + CSOR_NAND_ECC_MODE_4) { + layout = &oob_4096_ecc4; + } else { + layout = &oob_4096_ecc8; + nand->ecc.bytes = 16; + } + + priv->bufnum_mask = 1; + break; + + default: + printf("ifc nand: bad csor %#x: bad page size\n", csor); + return -ENODEV; + } + + /* Must also set CSOR_NAND_ECC_ENC_EN if DEC_EN set */ + if (csor & CSOR_NAND_ECC_DEC_EN) { + nand->ecc.mode = NAND_ECC_HW; + nand->ecc.layout = layout; + } else { + nand->ecc.mode = NAND_ECC_SOFT; + } + + return 0; +} diff --git a/nand_spl/nand_boot_fsl_ifc.c b/nand_spl/nand_boot_fsl_ifc.c new file mode 100644 index 0000000..4948e70 --- /dev/null +++ b/nand_spl/nand_boot_fsl_ifc.c @@ -0,0 +1,268 @@ +/* + * NAND boot for Freescale Integrated Flash Controller, NAND Flash Control Machine + * + * Copyright 2011 Freescale Semiconductor, Inc. + * Author: Dipen Dudhat dipen.dudhat@freescale.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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/fsl_ifc.h> +#include <linux/mtd/nand.h> + +static inline int is_blank(uchar *addr, int page_size) +{ + int i; + + for (i = 0; i < page_size; i++) { + if (__raw_readb(&addr[i]) != 0xff) + return 0; + } + + /* + * For the SPL, don't worry about uncorrectable errors + * where the main area is all FFs but shouldn't be. + */ + return 1; +} + +/* returns nonzero if entire page is blank */ +static inline int check_read_ecc(uchar *buf, u32 *eccstat, + unsigned int bufnum, int page_size) +{ + u32 reg = eccstat[bufnum / 4]; + int errors = (reg >> ((3 - bufnum % 4) * 8)) & 15; + + if (errors == 15) { /* uncorrectable */ + /* Blank pages fail hw ECC checks */ + if (is_blank(buf, page_size)) + return 1; + + puts("ecc error\n"); + for (;;); + } + + return 0; +} + +static inline void nand_wait(uchar *buf, int bufnum, int page_size) +{ + struct fsl_ifc *ifc = IFC_BASE_ADDR; + u32 status; + u32 eccstat[4]; + int bufperpage = page_size / 512; + int bufnum_end, i; + + bufnum *= bufperpage; + bufnum_end = bufnum + bufperpage - 1; + + do { + status = in_be32(&ifc->ifc_nand.nand_evter_stat); + } while (!(status & IFC_NAND_EVTER_STAT_OPC)); + + if (status & IFC_NAND_EVTER_STAT_FTOER) { + puts("flash time out error\n"); + for (;;); + } + + for (i = bufnum / 4; i <= bufnum_end / 4; i++) + eccstat[i] = in_be32(&ifc->ifc_nand.nand_eccstat[i]); + + for (i = bufnum; i <= bufnum_end; i++) { + if (check_read_ecc(buf, eccstat, i, page_size)) + break; + } + + out_be32(&ifc->ifc_nand.nand_evter_stat, status); +} + +static inline int bad_block(uchar *marker, int port_size) +{ + if (port_size == 8) + return __raw_readb(marker) != 0xff; + else + return __raw_readw((u16 *)marker) != 0xffff; +} + +static void nand_load(unsigned int offs, int uboot_size, uchar *dst) +{ + struct fsl_ifc *ifc = IFC_BASE_ADDR; + uchar *buf = (uchar *)CONFIG_SYS_NAND_BASE; + int page_size; + int port_size; + int pages_per_blk; + int blk_size; + int bad_marker = 0; + int bufnum_mask, bufnum; + + int csor, cspr; + int pos = 0; + int j = 0; + + int sram_addr; + int pg_no; + + /* Get NAND Flash configuration */ + csor = CONFIG_SYS_NAND_CSOR; + cspr = CONFIG_SYS_NAND_CSPR; + + if (!(csor & CSOR_NAND_ECC_DEC_EN)) { + /* soft ECC in SPL is unimplemented */ + puts("WARNING: soft ECC not checked in SPL\n"); + } else { + u32 hwcsor; + + /* make sure board is configured with ECC on boot */ + hwcsor = in_be32(&ifc->csor_cs[0].csor); + if (!(hwcsor & CSOR_NAND_ECC_DEC_EN)) + puts("WARNING: ECC not checked in SPL, check board cfg\n"); + } + + port_size = (cspr & CSPR_PORT_SIZE_16) ? 16 : 8; + + if (csor & CSOR_NAND_PGS_4K) { + page_size = 4096; + bufnum_mask = 1; + } else if (csor & CSOR_NAND_PGS_2K) { + page_size = 2048; + bufnum_mask = 3; + } else { + page_size = 512; + bufnum_mask = 15; + + if (port_size == 8) + bad_marker = 5; + } + + pages_per_blk = + 32 << ((csor & CSOR_NAND_PB_MASK) >> CSOR_NAND_PB_SHIFT); + + blk_size = pages_per_blk * page_size; + + /* Open Full SRAM mapping for spare are access */ + out_be32(&ifc->ifc_nand.ncfgr, 0x0); + + /* Clear Boot events */ + out_be32(&ifc->ifc_nand.nand_evter_stat, 0xffffffff); + + /* Program FIR/FCR for Large/Small page */ + if (page_size > 512) { + out_be32(&ifc->ifc_nand.nand_fir0, + (IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) | + (IFC_FIR_OP_CA0 << IFC_NAND_FIR0_OP1_SHIFT) | + (IFC_FIR_OP_RA0 << IFC_NAND_FIR0_OP2_SHIFT) | + (IFC_FIR_OP_CMD1 << IFC_NAND_FIR0_OP3_SHIFT) | + (IFC_FIR_OP_BTRD << IFC_NAND_FIR0_OP4_SHIFT)); + out_be32(&ifc->ifc_nand.nand_fir1, 0x0); + + out_be32(&ifc->ifc_nand.nand_fcr0, + (NAND_CMD_READ0 << IFC_NAND_FCR0_CMD0_SHIFT) | + (NAND_CMD_READSTART << IFC_NAND_FCR0_CMD1_SHIFT)); + } else { + out_be32(&ifc->ifc_nand.nand_fir0, + (IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) | + (IFC_FIR_OP_CA0 << IFC_NAND_FIR0_OP1_SHIFT) | + (IFC_FIR_OP_RA0 << IFC_NAND_FIR0_OP2_SHIFT) | + (IFC_FIR_OP_BTRD << IFC_NAND_FIR0_OP3_SHIFT)); + out_be32(&ifc->ifc_nand.nand_fir1, 0x0); + + out_be32(&ifc->ifc_nand.nand_fcr0, + NAND_CMD_READ0 << IFC_NAND_FCR0_CMD0_SHIFT); + } + + /* Program FBCR = 0 for full page read */ + out_be32(&ifc->ifc_nand.nand_fbcr, 0); + + /* Read and copy u-boot on SDRAM from NAND device, In parallel + * check for Bad block if found skip it and read continue to + * next Block + */ + while (pos < uboot_size) { + int i = 0; + do { + pg_no = offs / page_size; + bufnum = pg_no & bufnum_mask; + sram_addr = bufnum * page_size * 2; + + out_be32(&ifc->ifc_nand.row0, pg_no); + out_be32(&ifc->ifc_nand.col0, 0); + /* start read */ + out_be32(&ifc->ifc_nand.nandseq_strt, + IFC_NAND_SEQ_STRT_FIR_STRT); + + /* wait for read to complete */ + nand_wait(&buf[sram_addr], bufnum, page_size); + + /* + * If either of the first two pages are marked bad, + * continue to the next block. + */ + if (i++ < 2 && + bad_block(&buf[sram_addr + page_size + bad_marker], + port_size)) { + puts("skipping\n"); + offs = (offs + blk_size) & ~(blk_size - 1); + pos &= ~(blk_size - 1); + break; + } + + for (j = 0; j < page_size; j++) + dst[pos + j] = __raw_readb(&buf[sram_addr + j]); + + pos += page_size; + offs += page_size; + } while ((offs & (blk_size - 1)) && (pos < uboot_size)); + } +} + +/* + * Main entrypoint for NAND Boot. It's necessary that SDRAM is already + * configured and available since this code loads the main U-boot image + * from NAND into SDRAM and starts from there. + */ +void nand_boot(void) +{ + __attribute__((noreturn)) void (*uboot)(void); + + /* + * Load U-Boot image from NAND into RAM + */ + nand_load(CONFIG_SYS_NAND_U_BOOT_OFFS, CONFIG_SYS_NAND_U_BOOT_SIZE, + (uchar *)CONFIG_SYS_NAND_U_BOOT_DST); + +#ifdef CONFIG_NAND_ENV_DST + nand_load(CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, + (uchar *)CONFIG_NAND_ENV_DST); + +#ifdef CONFIG_ENV_OFFSET_REDUND + nand_load(CONFIG_ENV_OFFSET_REDUND, CONFIG_ENV_SIZE, + (uchar *)CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE); +#endif +#endif + + /* + * Jump to U-Boot image + */ + /* + * Clean d-cache and invalidate i-cache, to + * make sure that no stale data is executed. + */ + flush_cache(CONFIG_SYS_NAND_U_BOOT_DST, CONFIG_SYS_NAND_U_BOOT_SIZE); + uboot = (void *)CONFIG_SYS_NAND_U_BOOT_START; + uboot(); +}