| /* Integrated Flash Controller NAND Machine Driver |
| * |
| * Copyright (c) 2012 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; |
| |
| errors = (reg >> ((3 - bufnum % 4) * 8)) & 15; |
| |
| return errors; |
| } |
| |
| /* |
| * 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 errors; |
| int bufnum = ctrl->page & priv->bufnum_mask; |
| int sector = bufnum * chip->ecc.steps; |
| int sector_end = sector + chip->ecc.steps - 1; |
| |
| for (i = sector / 4; i <= sector_end / 4; i++) |
| eccstat[i] = in_be32(&ifc->ifc_nand.nand_eccstat[i]); |
| |
| for (i = sector; i <= sector_end; i++) { |
| errors = check_read_ecc(mtd, ctrl, eccstat, i); |
| |
| if (errors == 15) { |
| /* |
| * Uncorrectable error. |
| * OK only if the whole page is blank. |
| * |
| * We disable ECCER reporting due to erratum |
| * IFC-A002770 -- so report it now if we |
| * see an uncorrectable error in ECCSTAT. |
| */ |
| if (!is_blank(mtd, ctrl, bufnum)) |
| ctrl->status |= |
| IFC_NAND_EVTER_STAT_ECCER; |
| break; |
| } |
| |
| mtd->ecc_stats.corrected += errors; |
| } |
| |
| 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) |
| nand_fcr0 |= |
| NAND_CMD_READOOB << IFC_NAND_FCR0_CMD0_SHIFT; |
| else |
| nand_fcr0 |= |
| NAND_CMD_READ0 << IFC_NAND_FCR0_CMD0_SHIFT; |
| } |
| |
| if (column >= mtd->writesize) { |
| /* OOB area --> READOOB */ |
| column -= mtd->writesize; |
| ctrl->oob = 1; |
| } |
| 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 - ctrl->column); |
| 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; |
| } |