Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-12-26 04:53:42 +00:00
Code Issues Projects Releases Packages Wiki Activity
u-boot/drivers/mtd/nand/raw/fsl_ifc_nand.c
Maxim Kochetkov cad6ffa34d mtd: rawnand: fsl_ifc: fix FSL NAND driver to read all ONFI parameter pages 
Linux commit a75bbe71a27 ("mtd: rawnand: fsl_ifc: fix FSL NAND driver to
 read all ONFI parameter pages")

Per ONFI specification (Rev. 4.0), if the CRC of the first parameter page
read is not valid, the host should read redundant parameter page copies.
Fix FSL NAND driver to read the two redundant copies which are mandatory
in the specification.

Signed-off-by: Jane Wan <Jane.Wan@nokia.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Maxim Kochetkov <fido_max@inbox.ru>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
2021-03-23 18:06:07 +05:30

1069 lines
29 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0+
/* Integrated Flash Controller NAND Machine Driver
*
* Copyright (c) 2012 Freescale Semiconductor, Inc
*
* Authors: Dipen Dudhat <Dipen.Dudhat@freescale.com>
*/
#include <common.h>
#include <command.h>
#include <malloc.h>
#include <nand.h>
#include <dm/devres.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/rawnand.h>
#include <linux/mtd/nand_ecc.h>
#include <asm/io.h>
#include <linux/errno.h>
#include <fsl_ifc.h>
#ifndef CONFIG_SYS_FSL_IFC_BANK_COUNT
#define CONFIG_SYS_FSL_IFC_BANK_COUNT 4
#endif
#define MAX_BANKS CONFIG_SYS_FSL_IFC_BANK_COUNT
#define ERR_BYTE 0xFF /* Value returned for read bytes
when read failed */
struct fsl_ifc_ctrl;
/* mtd information per set */
struct fsl_ifc_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;
void __iomem *addr; /* Address of assigned IFC buffer */
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} },
};
/* 8192-byte page size with 4-bit ECC */
static struct nand_ecclayout oob_8192_ecc4 = {
.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, 208} },
};
/* 8192-byte page size with 8-bit ECC -- requires 218-byte OOB */
static struct nand_ecclayout oob_8192_ecc8 = {
.eccbytes = 256,
.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,
136, 137, 138, 139, 140, 141, 142, 143,
144, 145, 146, 147, 148, 149, 150, 151,
152, 153, 154, 155, 156, 157, 158, 159,
160, 161, 162, 163, 164, 165, 166, 167,
168, 169, 170, 171, 172, 173, 174, 175,
176, 177, 178, 179, 180, 181, 182, 183,
184, 185, 186, 187, 188, 189, 190, 191,
192, 193, 194, 195, 196, 197, 198, 199,
200, 201, 202, 203, 204, 205, 206, 207,
208, 209, 210, 211, 212, 213, 214, 215,
216, 217, 218, 219, 220, 221, 222, 223,
224, 225, 226, 227, 228, 229, 230, 231,
232, 233, 234, 235, 236, 237, 238, 239,
240, 241, 242, 243, 244, 245, 246, 247,
248, 249, 250, 251, 252, 253, 254, 255,
256, 257, 258, 259, 260, 261, 262, 263,
},
.oobfree = { {2, 6}, {264, 80} },
};
/*
* 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_to_nand(mtd);
struct fsl_ifc_mtd *priv = nand_get_controller_data(chip);
struct fsl_ifc_ctrl *ctrl = priv->ctrl;
struct fsl_ifc_runtime *ifc = ctrl->regs.rregs;
int buf_num;
ctrl->page = page_addr;
/* Program ROW0/COL0 */
ifc_out32(&ifc->ifc_nand.row0, page_addr);
ifc_out32(&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;
}
/* 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)
{
return (eccstat >> ((3 - bufnum % 4) * 8)) & 15;
}
/*
* 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_to_nand(mtd);
struct fsl_ifc_mtd *priv = nand_get_controller_data(chip);
struct fsl_ifc_ctrl *ctrl = priv->ctrl;
struct fsl_ifc_runtime *ifc = ctrl->regs.rregs;
u32 timeo = (CONFIG_SYS_HZ * 10) / 1000;
u32 time_start;
u32 eccstat;
int i;
/* set the chip select for NAND Transaction */
ifc_out32(&ifc->ifc_nand.nand_csel, priv->bank << IFC_NAND_CSEL_SHIFT);
/* start read/write seq */
ifc_out32(&ifc->ifc_nand.nandseq_strt,
IFC_NAND_SEQ_STRT_FIR_STRT);
/* wait for NAND Machine complete flag or timeout */
time_start = get_timer(0);
while (get_timer(time_start) < timeo) {
ctrl->status = ifc_in32(&ifc->ifc_nand.nand_evter_stat);
if (ctrl->status & IFC_NAND_EVTER_STAT_OPC)
break;
}
ifc_out32(&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_start = bufnum * chip->ecc.steps;
int sector_end = sector_start + chip->ecc.steps - 1;
u32 *eccstat_regs;
eccstat_regs = ifc->ifc_nand.nand_eccstat;
eccstat = ifc_in32(&eccstat_regs[sector_start / 4]);
for (i = sector_start; i <= sector_end; i++) {
if ((i != sector_start) && !(i % 4))
eccstat = ifc_in32(&eccstat_regs[i / 4]);
errors = check_read_ecc(mtd, ctrl, eccstat, i);
if (errors == 15) {
/*
* Uncorrectable error.
* We'll check for blank pages later.
*
* We disable ECCER reporting due to erratum
* IFC-A002770 -- so report it now if we
* see an uncorrectable error in ECCSTAT.
*/
ctrl->status |= IFC_NAND_EVTER_STAT_ECCER;
continue;
}
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 = nand_get_controller_data(chip);
struct fsl_ifc_ctrl *ctrl = priv->ctrl;
struct fsl_ifc_runtime *ifc = ctrl->regs.rregs;
/* Program FIR/IFC_NAND_FCR0 for Small/Large page */
if (mtd->writesize > 512) {
ifc_out32(&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));
ifc_out32(&ifc->ifc_nand.nand_fir1, 0x0);
ifc_out32(&ifc->ifc_nand.nand_fcr0,
(NAND_CMD_READ0 << IFC_NAND_FCR0_CMD0_SHIFT) |
(NAND_CMD_READSTART << IFC_NAND_FCR0_CMD1_SHIFT));
} else {
ifc_out32(&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)
ifc_out32(&ifc->ifc_nand.nand_fcr0,
NAND_CMD_READOOB << IFC_NAND_FCR0_CMD0_SHIFT);
else
ifc_out32(&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_to_nand(mtd);
struct fsl_ifc_mtd *priv = nand_get_controller_data(chip);
struct fsl_ifc_ctrl *ctrl = priv->ctrl;
struct fsl_ifc_runtime *ifc = ctrl->regs.rregs;
/* 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: {
ifc_out32(&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:
ifc_out32(&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:
case NAND_CMD_PARAM: {
/*
* For READID, read 8 bytes that are currently used.
* For PARAM, read all 3 copies of 256-bytes pages.
*/
int len = 8;
int timing = IFC_FIR_OP_RB;
if (command == NAND_CMD_PARAM) {
timing = IFC_FIR_OP_RBCD;
len = 256 * 3;
}
ifc_out32(&ifc->ifc_nand.nand_fir0,
(IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) |
(IFC_FIR_OP_UA << IFC_NAND_FIR0_OP1_SHIFT) |
(timing << IFC_NAND_FIR0_OP2_SHIFT));
ifc_out32(&ifc->ifc_nand.nand_fcr0,
command << IFC_NAND_FCR0_CMD0_SHIFT);
ifc_out32(&ifc->ifc_nand.row3, column);
ifc_out32(&ifc->ifc_nand.nand_fbcr, len);
ctrl->read_bytes = len;
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:
ifc_out32(&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));
ifc_out32(&ifc->ifc_nand.nand_fcr0,
(NAND_CMD_ERASE1 << IFC_NAND_FCR0_CMD0_SHIFT) |
(NAND_CMD_ERASE2 << IFC_NAND_FCR0_CMD1_SHIFT));
ifc_out32(&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_STATUS << IFC_NAND_FCR0_CMD1_SHIFT) |
(NAND_CMD_PAGEPROG << IFC_NAND_FCR0_CMD2_SHIFT);
ifc_out32(&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_CMD2 << IFC_NAND_FIR0_OP4_SHIFT));
ifc_out32(&ifc->ifc_nand.nand_fir1,
(IFC_FIR_OP_CW1 << IFC_NAND_FIR1_OP5_SHIFT) |
(IFC_FIR_OP_RDSTAT <<
IFC_NAND_FIR1_OP6_SHIFT) |
(IFC_FIR_OP_NOP << IFC_NAND_FIR1_OP7_SHIFT));
} else {
nand_fcr0 = ((NAND_CMD_PAGEPROG <<
IFC_NAND_FCR0_CMD1_SHIFT) |
(NAND_CMD_SEQIN <<
IFC_NAND_FCR0_CMD2_SHIFT) |
(NAND_CMD_STATUS <<
IFC_NAND_FCR0_CMD3_SHIFT));
ifc_out32(&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));
ifc_out32(&ifc->ifc_nand.nand_fir1,
(IFC_FIR_OP_CMD1 << IFC_NAND_FIR1_OP5_SHIFT) |
(IFC_FIR_OP_CW3 << IFC_NAND_FIR1_OP6_SHIFT) |
(IFC_FIR_OP_RDSTAT <<
IFC_NAND_FIR1_OP7_SHIFT) |
(IFC_FIR_OP_NOP << IFC_NAND_FIR1_OP8_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;
}
ifc_out32(&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)
ifc_out32(&ifc->ifc_nand.nand_fbcr,
ctrl->index - ctrl->column);
else
ifc_out32(&ifc->ifc_nand.nand_fbcr, 0);
fsl_ifc_run_command(mtd);
return;
case NAND_CMD_STATUS:
ifc_out32(&ifc->ifc_nand.nand_fir0,
(IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) |
(IFC_FIR_OP_RB << IFC_NAND_FIR0_OP1_SHIFT));
ifc_out32(&ifc->ifc_nand.nand_fcr0,
NAND_CMD_STATUS << IFC_NAND_FCR0_CMD0_SHIFT);
ifc_out32(&ifc->ifc_nand.nand_fbcr, 1);
set_addr(mtd, 0, 0, 0);
ctrl->read_bytes = 1;
fsl_ifc_run_command(mtd);
/*
* The chip always seems to report that it is
* write-protected, even when it is not.
*/
if (chip->options & NAND_BUSWIDTH_16)
ifc_out16(ctrl->addr,
ifc_in16(ctrl->addr) | NAND_STATUS_WP);
else
out_8(ctrl->addr, in_8(ctrl->addr) | NAND_STATUS_WP);
return;
case NAND_CMD_RESET:
ifc_out32(&ifc->ifc_nand.nand_fir0,
IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT);
ifc_out32(&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_to_nand(mtd);
struct fsl_ifc_mtd *priv = nand_get_controller_data(chip);
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_to_nand(mtd);
struct fsl_ifc_mtd *priv = nand_get_controller_data(chip);
struct fsl_ifc_ctrl *ctrl = priv->ctrl;
unsigned int offset;
/*
* If there are still bytes in the IFC buffer, then use the
* next byte.
*/
if (ctrl->index < ctrl->read_bytes) {
offset = ctrl->index++;
return in_8(ctrl->addr + offset);
}
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_to_nand(mtd);
struct fsl_ifc_mtd *priv = nand_get_controller_data(chip);
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 = ifc_in16(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_to_nand(mtd);
struct fsl_ifc_mtd *priv = nand_get_controller_data(chip);
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);
}
/* 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 = nand_get_controller_data(chip);
struct fsl_ifc_ctrl *ctrl = priv->ctrl;
struct fsl_ifc_runtime *ifc = ctrl->regs.rregs;
u32 nand_fsr;
int status;
if (ctrl->status != IFC_NAND_EVTER_STAT_OPC)
return NAND_STATUS_FAIL;
/* Use READ_STATUS command, but wait for the device to be ready */
ifc_out32(&ifc->ifc_nand.nand_fir0,
(IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) |
(IFC_FIR_OP_RDSTAT << IFC_NAND_FIR0_OP1_SHIFT));
ifc_out32(&ifc->ifc_nand.nand_fcr0, NAND_CMD_STATUS <<
IFC_NAND_FCR0_CMD0_SHIFT);
ifc_out32(&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 = ifc_in32(&ifc->ifc_nand.nand_fsr);
status = nand_fsr >> 24;
/* Chip sometimes reporting write protect even when it's not */
return status | NAND_STATUS_WP;
}
/*
* The controller does not check for bitflips in erased pages,
* therefore software must check instead.
*/
static int
check_erased_page(struct nand_chip *chip, u8 *buf, struct mtd_info *mtd)
{
u8 *ecc = chip->oob_poi;
const int ecc_size = chip->ecc.bytes;
const int pkt_size = chip->ecc.size;
int i, res, bitflips;
/* IFC starts ecc bytes at offset 8 in the spare area. */
ecc += 8;
bitflips = 0;
for (i = 0; i < chip->ecc.steps; i++) {
res = nand_check_erased_ecc_chunk(buf, pkt_size, ecc, ecc_size,
NULL, 0, chip->ecc.strength);
if (res < 0) {
printf("fsl-ifc: NAND Flash ECC Uncorrectable Error\n");
mtd->ecc_stats.failed++;
} else if (res > 0) {
mtd->ecc_stats.corrected += res;
}
bitflips = max(res, bitflips);
buf += pkt_size;
ecc += ecc_size;
}
return bitflips;
}
static int fsl_ifc_read_page(struct mtd_info *mtd, struct nand_chip *chip,
uint8_t *buf, int oob_required, int page)
{
struct fsl_ifc_mtd *priv = nand_get_controller_data(chip);
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_ECCER)
return check_erased_page(chip, buf, mtd);
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 int fsl_ifc_write_page(struct mtd_info *mtd, struct nand_chip *chip,
const uint8_t *buf, int oob_required, int page)
{
fsl_ifc_write_buf(mtd, buf, mtd->writesize);
fsl_ifc_write_buf(mtd, chip->oob_poi, mtd->oobsize);
return 0;
}
static void fsl_ifc_ctrl_init(void)
{
uint32_t ver = 0;
ifc_ctrl = kzalloc(sizeof(*ifc_ctrl), GFP_KERNEL);
if (!ifc_ctrl)
return;
ifc_ctrl->regs.gregs = IFC_FCM_BASE_ADDR;
ver = ifc_in32(&ifc_ctrl->regs.gregs->ifc_rev);
if (ver >= FSL_IFC_V2_0_0)
ifc_ctrl->regs.rregs =
(void *)CONFIG_SYS_IFC_ADDR + IFC_RREGS_64KOFFSET;
else
ifc_ctrl->regs.rregs =
(void *)CONFIG_SYS_IFC_ADDR + IFC_RREGS_4KOFFSET;
/* clear event registers */
ifc_out32(&ifc_ctrl->regs.rregs->ifc_nand.nand_evter_stat, ~0U);
ifc_out32(&ifc_ctrl->regs.rregs->ifc_nand.pgrdcmpl_evt_stat, ~0U);
/* Enable error and event for any detected errors */
ifc_out32(&ifc_ctrl->regs.rregs->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);
ifc_out32(&ifc_ctrl->regs.rregs->ifc_nand.ncfgr, 0x0);
}
static void fsl_ifc_select_chip(struct mtd_info *mtd, int chip)
{
}
static int fsl_ifc_sram_init(struct fsl_ifc_mtd *priv, uint32_t ver)
{
struct fsl_ifc_runtime *ifc = ifc_ctrl->regs.rregs;
uint32_t cs = 0, csor = 0, csor_8k = 0, csor_ext = 0;
uint32_t ncfgr = 0;
u32 timeo = (CONFIG_SYS_HZ * 10) / 1000;
u32 time_start;
if (ver > FSL_IFC_V1_1_0) {
ncfgr = ifc_in32(&ifc->ifc_nand.ncfgr);
ifc_out32(&ifc->ifc_nand.ncfgr, ncfgr | IFC_NAND_SRAM_INIT_EN);
/* wait for SRAM_INIT bit to be clear or timeout */
time_start = get_timer(0);
while (get_timer(time_start) < timeo) {
ifc_ctrl->status =
ifc_in32(&ifc->ifc_nand.nand_evter_stat);
if (!(ifc_ctrl->status & IFC_NAND_SRAM_INIT_EN))
return 0;
}
printf("fsl-ifc: Failed to Initialise SRAM\n");
return 1;
}
cs = priv->bank;
/* Save CSOR and CSOR_ext */
csor = ifc_in32(&ifc_ctrl->regs.gregs->csor_cs[cs].csor);
csor_ext = ifc_in32(&ifc_ctrl->regs.gregs->csor_cs[cs].csor_ext);
/* chage PageSize 8K and SpareSize 1K*/
csor_8k = (csor & ~(CSOR_NAND_PGS_MASK)) | 0x0018C000;
ifc_out32(&ifc_ctrl->regs.gregs->csor_cs[cs].csor, csor_8k);
ifc_out32(&ifc_ctrl->regs.gregs->csor_cs[cs].csor_ext, 0x0000400);
/* READID */
ifc_out32(&ifc->ifc_nand.nand_fir0,
(IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) |
(IFC_FIR_OP_UA << IFC_NAND_FIR0_OP1_SHIFT) |
(IFC_FIR_OP_RB << IFC_NAND_FIR0_OP2_SHIFT));
ifc_out32(&ifc->ifc_nand.nand_fcr0,
NAND_CMD_READID << IFC_NAND_FCR0_CMD0_SHIFT);
ifc_out32(&ifc->ifc_nand.row3, 0x0);
ifc_out32(&ifc->ifc_nand.nand_fbcr, 0x0);
/* Program ROW0/COL0 */
ifc_out32(&ifc->ifc_nand.row0, 0x0);
ifc_out32(&ifc->ifc_nand.col0, 0x0);
/* set the chip select for NAND Transaction */
ifc_out32(&ifc->ifc_nand.nand_csel, priv->bank << IFC_NAND_CSEL_SHIFT);
/* start read seq */
ifc_out32(&ifc->ifc_nand.nandseq_strt, IFC_NAND_SEQ_STRT_FIR_STRT);
time_start = get_timer(0);
while (get_timer(time_start) < timeo) {
ifc_ctrl->status = ifc_in32(&ifc->ifc_nand.nand_evter_stat);
if (ifc_ctrl->status & IFC_NAND_EVTER_STAT_OPC)
break;
}
if (ifc_ctrl->status != IFC_NAND_EVTER_STAT_OPC) {
printf("fsl-ifc: Failed to Initialise SRAM\n");
return 1;
}
ifc_out32(&ifc->ifc_nand.nand_evter_stat, ifc_ctrl->status);
/* Restore CSOR and CSOR_ext */
ifc_out32(&ifc_ctrl->regs.gregs->csor_cs[cs].csor, csor);
ifc_out32(&ifc_ctrl->regs.gregs->csor_cs[cs].csor_ext, csor_ext);
return 0;
}
static int fsl_ifc_chip_init(int devnum, u8 *addr)
{
struct mtd_info *mtd;
struct nand_chip *nand;
struct fsl_ifc_mtd *priv;
struct nand_ecclayout *layout;
struct fsl_ifc_fcm *gregs = NULL;
uint32_t cspr = 0, csor = 0, ver = 0;
int ret = 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 = addr;
gregs = ifc_ctrl->regs.gregs;
/* Find which chip select it is connected to.
*/
for (priv->bank = 0; priv->bank < MAX_BANKS; priv->bank++) {
phys_addr_t phys_addr = virt_to_phys(addr);
cspr = ifc_in32(&gregs->cspr_cs[priv->bank].cspr);
csor = ifc_in32(&gregs->csor_cs[priv->bank].csor);
if ((cspr & CSPR_V) && (cspr & CSPR_MSEL) == CSPR_MSEL_NAND &&
(cspr & CSPR_BA) == CSPR_PHYS_ADDR(phys_addr))
break;
}
if (priv->bank >= MAX_BANKS) {
printf("%s: address did not match any "
"chip selects\n", __func__);
kfree(priv);
return -ENODEV;
}
nand = &priv->chip;
mtd = nand_to_mtd(nand);
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->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_SUBPAGE_WRITE;
nand->bbt_options = NAND_BBT_USE_FLASH;
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_set_controller_data(nand, 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;
}
nand->ecc.strength = 4;
priv->bufnum_mask = 15;
break;
case CSOR_NAND_PGS_2K:
layout = &oob_2048_ecc4;
nand->ecc.strength = 4;
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;
nand->ecc.strength = 4;
} else {
layout = &oob_4096_ecc8;
nand->ecc.strength = 8;
nand->ecc.bytes = 16;
}
priv->bufnum_mask = 1;
break;
case CSOR_NAND_PGS_8K:
if ((csor & CSOR_NAND_ECC_MODE_MASK) ==
CSOR_NAND_ECC_MODE_4) {
layout = &oob_8192_ecc4;
nand->ecc.strength = 4;
} else {
layout = &oob_8192_ecc8;
nand->ecc.strength = 8;
nand->ecc.bytes = 16;
}
priv->bufnum_mask = 0;
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;
}
ver = ifc_in32(&gregs->ifc_rev);
if (ver >= FSL_IFC_V1_1_0)
ret = fsl_ifc_sram_init(priv, ver);
if (ret)
return ret;
if (ver >= FSL_IFC_V2_0_0)
priv->bufnum_mask = (priv->bufnum_mask * 2) + 1;
ret = nand_scan_ident(mtd, 1, NULL);
if (ret)
return ret;
ret = nand_scan_tail(mtd);
if (ret)
return ret;
ret = nand_register(devnum, mtd);
if (ret)
return ret;
return 0;
}
#ifndef CONFIG_SYS_NAND_BASE_LIST
#define CONFIG_SYS_NAND_BASE_LIST { CONFIG_SYS_NAND_BASE }
#endif
static unsigned long base_address[CONFIG_SYS_MAX_NAND_DEVICE] =
CONFIG_SYS_NAND_BASE_LIST;
void board_nand_init(void)
{
int i;
for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++)
fsl_ifc_chip_init(i, (u8 *)base_address[i]);
}
Reference in a new issue View git blame Copy permalink