upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
475 lines
13 KiB
475 lines
13 KiB
/*
|
|
* NAND driver for TI DaVinci based boards.
|
|
*
|
|
* Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
|
|
*
|
|
* Based on Linux DaVinci NAND driver by TI. Original copyright follows:
|
|
*/
|
|
|
|
/*
|
|
*
|
|
* linux/drivers/mtd/nand/nand_davinci.c
|
|
*
|
|
* NAND Flash Driver
|
|
*
|
|
* Copyright (C) 2006 Texas Instruments.
|
|
*
|
|
* ----------------------------------------------------------------------------
|
|
*
|
|
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
* ----------------------------------------------------------------------------
|
|
*
|
|
* Overview:
|
|
* This is a device driver for the NAND flash device found on the
|
|
* DaVinci board which utilizes the Samsung k9k2g08 part.
|
|
*
|
|
Modifications:
|
|
ver. 1.0: Feb 2005, Vinod/Sudhakar
|
|
-
|
|
*
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/io.h>
|
|
|
|
#ifdef CONFIG_SYS_USE_NAND
|
|
#if !defined(CONFIG_NAND_LEGACY)
|
|
|
|
#include <nand.h>
|
|
#include <asm/arch/nand_defs.h>
|
|
#include <asm/arch/emif_defs.h>
|
|
|
|
extern struct nand_chip nand_dev_desc[CONFIG_SYS_MAX_NAND_DEVICE];
|
|
|
|
static void nand_davinci_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
|
|
{
|
|
struct nand_chip *this = mtd->priv;
|
|
u_int32_t IO_ADDR_W = (u_int32_t)this->IO_ADDR_W;
|
|
|
|
IO_ADDR_W &= ~(MASK_ALE|MASK_CLE);
|
|
|
|
if (ctrl & NAND_CTRL_CHANGE) {
|
|
if ( ctrl & NAND_CLE )
|
|
IO_ADDR_W |= MASK_CLE;
|
|
if ( ctrl & NAND_ALE )
|
|
IO_ADDR_W |= MASK_ALE;
|
|
this->IO_ADDR_W = (void __iomem *) IO_ADDR_W;
|
|
}
|
|
|
|
if (cmd != NAND_CMD_NONE)
|
|
writeb(cmd, this->IO_ADDR_W);
|
|
}
|
|
|
|
/* Set WP on deselect, write enable on select */
|
|
static void nand_davinci_select_chip(struct mtd_info *mtd, int chip)
|
|
{
|
|
#define GPIO_SET_DATA01 0x01c67018
|
|
#define GPIO_CLR_DATA01 0x01c6701c
|
|
#define GPIO_NAND_WP (1 << 4)
|
|
#ifdef SONATA_BOARD_GPIOWP
|
|
if (chip < 0) {
|
|
REG(GPIO_CLR_DATA01) |= GPIO_NAND_WP;
|
|
} else {
|
|
REG(GPIO_SET_DATA01) |= GPIO_NAND_WP;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#ifdef CONFIG_SYS_NAND_HW_ECC
|
|
#ifdef CONFIG_SYS_DAVINCI_BROKEN_ECC
|
|
/* Linux-compatible ECC uses MTD defaults. */
|
|
/* These layouts are not compatible with Linux or RBL/UBL. */
|
|
#ifdef CONFIG_SYS_NAND_LARGEPAGE
|
|
static struct nand_ecclayout davinci_nand_ecclayout = {
|
|
.eccbytes = 12,
|
|
.eccpos = {8, 9, 10, 24, 25, 26, 40, 41, 42, 56, 57, 58},
|
|
.oobfree = {
|
|
{.offset = 2, .length = 6},
|
|
{.offset = 12, .length = 12},
|
|
{.offset = 28, .length = 12},
|
|
{.offset = 44, .length = 12},
|
|
{.offset = 60, .length = 4}
|
|
}
|
|
};
|
|
#elif defined(CONFIG_SYS_NAND_SMALLPAGE)
|
|
static struct nand_ecclayout davinci_nand_ecclayout = {
|
|
.eccbytes = 3,
|
|
.eccpos = {0, 1, 2},
|
|
.oobfree = {
|
|
{.offset = 6, .length = 2},
|
|
{.offset = 8, .length = 8}
|
|
}
|
|
};
|
|
#else
|
|
#error "Either CONFIG_SYS_NAND_LARGEPAGE or CONFIG_SYS_NAND_SMALLPAGE must be defined!"
|
|
#endif
|
|
#endif /* CONFIG_SYS_DAVINCI_BROKEN_ECC */
|
|
|
|
static void nand_davinci_enable_hwecc(struct mtd_info *mtd, int mode)
|
|
{
|
|
emifregs emif_addr;
|
|
int dummy;
|
|
|
|
emif_addr = (emifregs)DAVINCI_ASYNC_EMIF_CNTRL_BASE;
|
|
|
|
dummy = emif_addr->NANDF1ECC;
|
|
dummy = emif_addr->NANDF2ECC;
|
|
dummy = emif_addr->NANDF3ECC;
|
|
dummy = emif_addr->NANDF4ECC;
|
|
|
|
emif_addr->NANDFCR |= (1 << 8);
|
|
}
|
|
|
|
static u_int32_t nand_davinci_readecc(struct mtd_info *mtd, u_int32_t region)
|
|
{
|
|
u_int32_t ecc = 0;
|
|
emifregs emif_base_addr;
|
|
|
|
emif_base_addr = (emifregs)DAVINCI_ASYNC_EMIF_CNTRL_BASE;
|
|
|
|
if (region == 1)
|
|
ecc = emif_base_addr->NANDF1ECC;
|
|
else if (region == 2)
|
|
ecc = emif_base_addr->NANDF2ECC;
|
|
else if (region == 3)
|
|
ecc = emif_base_addr->NANDF3ECC;
|
|
else if (region == 4)
|
|
ecc = emif_base_addr->NANDF4ECC;
|
|
|
|
return(ecc);
|
|
}
|
|
|
|
static int nand_davinci_calculate_ecc(struct mtd_info *mtd, const u_char *dat, u_char *ecc_code)
|
|
{
|
|
u_int32_t tmp;
|
|
#ifdef CONFIG_SYS_DAVINCI_BROKEN_ECC
|
|
/*
|
|
* This is not how you should read ECCs on large page Davinci devices.
|
|
* The region parameter gets you ECCs for flash chips on different chip
|
|
* selects, not the 4x512 byte pages in a 2048 byte page.
|
|
*
|
|
* Preserved for backwards compatibility though.
|
|
*/
|
|
|
|
int region, n;
|
|
struct nand_chip *this = mtd->priv;
|
|
|
|
n = (this->ecc.size/512);
|
|
|
|
region = 1;
|
|
while (n--) {
|
|
tmp = nand_davinci_readecc(mtd, region);
|
|
*ecc_code++ = tmp;
|
|
*ecc_code++ = tmp >> 16;
|
|
*ecc_code++ = ((tmp >> 8) & 0x0f) | ((tmp >> 20) & 0xf0);
|
|
region++;
|
|
}
|
|
#else
|
|
const int region = 1;
|
|
|
|
tmp = nand_davinci_readecc(mtd, region);
|
|
|
|
/* Squeeze 4 bytes ECC into 3 bytes by removing RESERVED bits
|
|
* and shifting. RESERVED bits are 31 to 28 and 15 to 12. */
|
|
tmp = (tmp & 0x00000fff) | ((tmp & 0x0fff0000) >> 4);
|
|
|
|
/* Invert so that erased block ECC is correct */
|
|
tmp = ~tmp;
|
|
|
|
*ecc_code++ = tmp;
|
|
*ecc_code++ = tmp >> 8;
|
|
*ecc_code++ = tmp >> 16;
|
|
#endif /* CONFIG_SYS_DAVINCI_BROKEN_ECC */
|
|
return(0);
|
|
}
|
|
|
|
#ifdef CONFIG_SYS_DAVINCI_BROKEN_ECC
|
|
static void nand_davinci_gen_true_ecc(u_int8_t *ecc_buf)
|
|
{
|
|
u_int32_t tmp = ecc_buf[0] | (ecc_buf[1] << 16) | ((ecc_buf[2] & 0xf0) << 20) | ((ecc_buf[2] & 0x0f) << 8);
|
|
|
|
ecc_buf[0] = ~(P64o(tmp) | P64e(tmp) | P32o(tmp) | P32e(tmp) | P16o(tmp) | P16e(tmp) | P8o(tmp) | P8e(tmp));
|
|
ecc_buf[1] = ~(P1024o(tmp) | P1024e(tmp) | P512o(tmp) | P512e(tmp) | P256o(tmp) | P256e(tmp) | P128o(tmp) | P128e(tmp));
|
|
ecc_buf[2] = ~( P4o(tmp) | P4e(tmp) | P2o(tmp) | P2e(tmp) | P1o(tmp) | P1e(tmp) | P2048o(tmp) | P2048e(tmp));
|
|
}
|
|
|
|
static int nand_davinci_compare_ecc(u_int8_t *ecc_nand, u_int8_t *ecc_calc, u_int8_t *page_data)
|
|
{
|
|
u_int32_t i;
|
|
u_int8_t tmp0_bit[8], tmp1_bit[8], tmp2_bit[8];
|
|
u_int8_t comp0_bit[8], comp1_bit[8], comp2_bit[8];
|
|
u_int8_t ecc_bit[24];
|
|
u_int8_t ecc_sum = 0;
|
|
u_int8_t find_bit = 0;
|
|
u_int32_t find_byte = 0;
|
|
int is_ecc_ff;
|
|
|
|
is_ecc_ff = ((*ecc_nand == 0xff) && (*(ecc_nand + 1) == 0xff) && (*(ecc_nand + 2) == 0xff));
|
|
|
|
nand_davinci_gen_true_ecc(ecc_nand);
|
|
nand_davinci_gen_true_ecc(ecc_calc);
|
|
|
|
for (i = 0; i <= 2; i++) {
|
|
*(ecc_nand + i) = ~(*(ecc_nand + i));
|
|
*(ecc_calc + i) = ~(*(ecc_calc + i));
|
|
}
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
tmp0_bit[i] = *ecc_nand % 2;
|
|
*ecc_nand = *ecc_nand / 2;
|
|
}
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
tmp1_bit[i] = *(ecc_nand + 1) % 2;
|
|
*(ecc_nand + 1) = *(ecc_nand + 1) / 2;
|
|
}
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
tmp2_bit[i] = *(ecc_nand + 2) % 2;
|
|
*(ecc_nand + 2) = *(ecc_nand + 2) / 2;
|
|
}
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
comp0_bit[i] = *ecc_calc % 2;
|
|
*ecc_calc = *ecc_calc / 2;
|
|
}
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
comp1_bit[i] = *(ecc_calc + 1) % 2;
|
|
*(ecc_calc + 1) = *(ecc_calc + 1) / 2;
|
|
}
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
comp2_bit[i] = *(ecc_calc + 2) % 2;
|
|
*(ecc_calc + 2) = *(ecc_calc + 2) / 2;
|
|
}
|
|
|
|
for (i = 0; i< 6; i++)
|
|
ecc_bit[i] = tmp2_bit[i + 2] ^ comp2_bit[i + 2];
|
|
|
|
for (i = 0; i < 8; i++)
|
|
ecc_bit[i + 6] = tmp0_bit[i] ^ comp0_bit[i];
|
|
|
|
for (i = 0; i < 8; i++)
|
|
ecc_bit[i + 14] = tmp1_bit[i] ^ comp1_bit[i];
|
|
|
|
ecc_bit[22] = tmp2_bit[0] ^ comp2_bit[0];
|
|
ecc_bit[23] = tmp2_bit[1] ^ comp2_bit[1];
|
|
|
|
for (i = 0; i < 24; i++)
|
|
ecc_sum += ecc_bit[i];
|
|
|
|
switch (ecc_sum) {
|
|
case 0:
|
|
/* Not reached because this function is not called if
|
|
ECC values are equal */
|
|
return 0;
|
|
case 1:
|
|
/* Uncorrectable error */
|
|
MTDDEBUG (MTD_DEBUG_LEVEL0,
|
|
"ECC UNCORRECTED_ERROR 1\n");
|
|
return(-1);
|
|
case 12:
|
|
/* Correctable error */
|
|
find_byte = (ecc_bit[23] << 8) +
|
|
(ecc_bit[21] << 7) +
|
|
(ecc_bit[19] << 6) +
|
|
(ecc_bit[17] << 5) +
|
|
(ecc_bit[15] << 4) +
|
|
(ecc_bit[13] << 3) +
|
|
(ecc_bit[11] << 2) +
|
|
(ecc_bit[9] << 1) +
|
|
ecc_bit[7];
|
|
|
|
find_bit = (ecc_bit[5] << 2) + (ecc_bit[3] << 1) + ecc_bit[1];
|
|
|
|
MTDDEBUG (MTD_DEBUG_LEVEL0, "Correcting single bit ECC "
|
|
"error at offset: %d, bit: %d\n",
|
|
find_byte, find_bit);
|
|
|
|
page_data[find_byte] ^= (1 << find_bit);
|
|
|
|
return(0);
|
|
default:
|
|
if (is_ecc_ff) {
|
|
if (ecc_calc[0] == 0 && ecc_calc[1] == 0 && ecc_calc[2] == 0)
|
|
return(0);
|
|
}
|
|
MTDDEBUG (MTD_DEBUG_LEVEL0,
|
|
"UNCORRECTED_ERROR default\n");
|
|
return(-1);
|
|
}
|
|
}
|
|
#endif /* CONFIG_SYS_DAVINCI_BROKEN_ECC */
|
|
|
|
static int nand_davinci_correct_data(struct mtd_info *mtd, u_char *dat, u_char *read_ecc, u_char *calc_ecc)
|
|
{
|
|
struct nand_chip *this = mtd->priv;
|
|
#ifdef CONFIG_SYS_DAVINCI_BROKEN_ECC
|
|
int block_count = 0, i, rc;
|
|
|
|
block_count = (this->ecc.size/512);
|
|
for (i = 0; i < block_count; i++) {
|
|
if (memcmp(read_ecc, calc_ecc, 3) != 0) {
|
|
rc = nand_davinci_compare_ecc(read_ecc, calc_ecc, dat);
|
|
if (rc < 0) {
|
|
return(rc);
|
|
}
|
|
}
|
|
read_ecc += 3;
|
|
calc_ecc += 3;
|
|
dat += 512;
|
|
}
|
|
#else
|
|
u_int32_t ecc_nand = read_ecc[0] | (read_ecc[1] << 8) |
|
|
(read_ecc[2] << 16);
|
|
u_int32_t ecc_calc = calc_ecc[0] | (calc_ecc[1] << 8) |
|
|
(calc_ecc[2] << 16);
|
|
u_int32_t diff = ecc_calc ^ ecc_nand;
|
|
|
|
if (diff) {
|
|
if ((((diff >> 12) ^ diff) & 0xfff) == 0xfff) {
|
|
/* Correctable error */
|
|
if ((diff >> (12 + 3)) < this->ecc.size) {
|
|
uint8_t find_bit = 1 << ((diff >> 12) & 7);
|
|
uint32_t find_byte = diff >> (12 + 3);
|
|
|
|
dat[find_byte] ^= find_bit;
|
|
MTDDEBUG(MTD_DEBUG_LEVEL0, "Correcting single "
|
|
"bit ECC error at offset: %d, bit: "
|
|
"%d\n", find_byte, find_bit);
|
|
return 1;
|
|
} else {
|
|
return -1;
|
|
}
|
|
} else if (!(diff & (diff - 1))) {
|
|
/* Single bit ECC error in the ECC itself,
|
|
nothing to fix */
|
|
MTDDEBUG(MTD_DEBUG_LEVEL0, "Single bit ECC error in "
|
|
"ECC.\n");
|
|
return 1;
|
|
} else {
|
|
/* Uncorrectable error */
|
|
MTDDEBUG(MTD_DEBUG_LEVEL0, "ECC UNCORRECTED_ERROR 1\n");
|
|
return -1;
|
|
}
|
|
}
|
|
#endif /* CONFIG_SYS_DAVINCI_BROKEN_ECC */
|
|
return(0);
|
|
}
|
|
#endif /* CONFIG_SYS_NAND_HW_ECC */
|
|
|
|
static int nand_davinci_dev_ready(struct mtd_info *mtd)
|
|
{
|
|
emifregs emif_addr;
|
|
|
|
emif_addr = (emifregs)DAVINCI_ASYNC_EMIF_CNTRL_BASE;
|
|
|
|
return(emif_addr->NANDFSR & 0x1);
|
|
}
|
|
|
|
static int nand_davinci_waitfunc(struct mtd_info *mtd, struct nand_chip *this)
|
|
{
|
|
while(!nand_davinci_dev_ready(mtd)) {;}
|
|
*NAND_CE0CLE = NAND_STATUS;
|
|
return(*NAND_CE0DATA);
|
|
}
|
|
|
|
static void nand_flash_init(void)
|
|
{
|
|
u_int32_t acfg1 = 0x3ffffffc;
|
|
u_int32_t acfg2 = 0x3ffffffc;
|
|
u_int32_t acfg3 = 0x3ffffffc;
|
|
u_int32_t acfg4 = 0x3ffffffc;
|
|
emifregs emif_regs;
|
|
|
|
/*------------------------------------------------------------------*
|
|
* NAND FLASH CHIP TIMEOUT @ 459 MHz *
|
|
* *
|
|
* AEMIF.CLK freq = PLL1/6 = 459/6 = 76.5 MHz *
|
|
* AEMIF.CLK period = 1/76.5 MHz = 13.1 ns *
|
|
* *
|
|
*------------------------------------------------------------------*/
|
|
acfg1 = 0
|
|
| (0 << 31 ) /* selectStrobe */
|
|
| (0 << 30 ) /* extWait */
|
|
| (1 << 26 ) /* writeSetup 10 ns */
|
|
| (3 << 20 ) /* writeStrobe 40 ns */
|
|
| (1 << 17 ) /* writeHold 10 ns */
|
|
| (1 << 13 ) /* readSetup 10 ns */
|
|
| (5 << 7 ) /* readStrobe 60 ns */
|
|
| (1 << 4 ) /* readHold 10 ns */
|
|
| (3 << 2 ) /* turnAround ?? ns */
|
|
| (0 << 0 ) /* asyncSize 8-bit bus */
|
|
;
|
|
|
|
emif_regs = (emifregs)DAVINCI_ASYNC_EMIF_CNTRL_BASE;
|
|
|
|
emif_regs->AWCCR |= 0x10000000;
|
|
emif_regs->AB1CR = acfg1; /* 0x08244128 */;
|
|
emif_regs->AB2CR = acfg2;
|
|
emif_regs->AB3CR = acfg3;
|
|
emif_regs->AB4CR = acfg4;
|
|
emif_regs->NANDFCR = 0x00000101;
|
|
}
|
|
|
|
int board_nand_init(struct nand_chip *nand)
|
|
{
|
|
nand->IO_ADDR_R = (void __iomem *)NAND_CE0DATA;
|
|
nand->IO_ADDR_W = (void __iomem *)NAND_CE0DATA;
|
|
nand->chip_delay = 0;
|
|
nand->select_chip = nand_davinci_select_chip;
|
|
#ifdef CONFIG_SYS_NAND_USE_FLASH_BBT
|
|
nand->options = NAND_USE_FLASH_BBT;
|
|
#endif
|
|
#ifdef CONFIG_SYS_NAND_HW_ECC
|
|
nand->ecc.mode = NAND_ECC_HW;
|
|
#ifdef CONFIG_SYS_DAVINCI_BROKEN_ECC
|
|
nand->ecc.layout = &davinci_nand_ecclayout;
|
|
#ifdef CONFIG_SYS_NAND_LARGEPAGE
|
|
nand->ecc.size = 2048;
|
|
nand->ecc.bytes = 12;
|
|
#elif defined(CONFIG_SYS_NAND_SMALLPAGE)
|
|
nand->ecc.size = 512;
|
|
nand->ecc.bytes = 3;
|
|
#else
|
|
#error "Either CONFIG_SYS_NAND_LARGEPAGE or CONFIG_SYS_NAND_SMALLPAGE must be defined!"
|
|
#endif
|
|
#else
|
|
nand->ecc.size = 512;
|
|
nand->ecc.bytes = 3;
|
|
#endif /* CONFIG_SYS_DAVINCI_BROKEN_ECC */
|
|
nand->ecc.calculate = nand_davinci_calculate_ecc;
|
|
nand->ecc.correct = nand_davinci_correct_data;
|
|
nand->ecc.hwctl = nand_davinci_enable_hwecc;
|
|
#else
|
|
nand->ecc.mode = NAND_ECC_SOFT;
|
|
#endif /* CONFIG_SYS_NAND_HW_ECC */
|
|
|
|
/* Set address of hardware control function */
|
|
nand->cmd_ctrl = nand_davinci_hwcontrol;
|
|
|
|
nand->dev_ready = nand_davinci_dev_ready;
|
|
nand->waitfunc = nand_davinci_waitfunc;
|
|
|
|
nand_flash_init();
|
|
|
|
return(0);
|
|
}
|
|
|
|
#else
|
|
#error "U-Boot legacy NAND support not available for DaVinci chips"
|
|
#endif
|
|
#endif /* CONFIG_SYS_USE_NAND */
|
|
|