diff options
author | Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> | 2009-03-30 18:58:39 +0200 |
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committer | Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> | 2009-03-30 18:58:39 +0200 |
commit | ee4f3e2765a1c65c9861c5d2cf2e6feb84b90bd8 (patch) | |
tree | 3968936421d56cf1e2426206d7cec95f4896b78b /cpu | |
parent | d3e55d0774a180c1837bd7ddec464015e883bd86 (diff) |
davinci: move nand driver to drivers/mtd/nand
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Diffstat (limited to 'cpu')
-rw-r--r-- | cpu/arm926ejs/davinci/Makefile | 2 | ||||
-rw-r--r-- | cpu/arm926ejs/davinci/nand.c | 475 |
2 files changed, 1 insertions, 476 deletions
diff --git a/cpu/arm926ejs/davinci/Makefile b/cpu/arm926ejs/davinci/Makefile index 0f77f402ed..53f77428e6 100644 --- a/cpu/arm926ejs/davinci/Makefile +++ b/cpu/arm926ejs/davinci/Makefile @@ -27,7 +27,7 @@ include $(TOPDIR)/config.mk LIB = $(obj)lib$(SOC).a -COBJS = timer.o ether.o lxt972.o dp83848.o i2c.o nand.o +COBJS = timer.o ether.o lxt972.o dp83848.o i2c.o SOBJS = lowlevel_init.o reset.o SRCS := $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c) diff --git a/cpu/arm926ejs/davinci/nand.c b/cpu/arm926ejs/davinci/nand.c deleted file mode 100644 index 014e2b0c11..0000000000 --- a/cpu/arm926ejs/davinci/nand.c +++ /dev/null @@ -1,475 +0,0 @@ -/* - * 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 */ |