davinci: move nand driver to drivers/mtd/nand

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

2 files changed, 1 insertions, 476 deletions

diff --git a/cpu/arm926ejs/davinci/Makefile b/cpu/arm926ejs/davinci/Makefile
index 0f77f40..53f7742 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 014e2b0..0000000
--- 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 */