2006-10-19 16:24:35 +00:00
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|
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/*
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2012-06-29 09:47:55 +00:00
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* Copyright © 2003 Rick Bronson
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2006-10-19 16:24:35 +00:00
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*
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* Derived from drivers/mtd/nand/autcpu12.c
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2012-06-29 09:47:55 +00:00
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* Copyright © 2001 Thomas Gleixner (gleixner@autronix.de)
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2006-10-19 16:24:35 +00:00
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*
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* Derived from drivers/mtd/spia.c
|
2012-06-29 09:47:55 +00:00
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* Copyright © 2000 Steven J. Hill (sjhill@cotw.com)
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2006-10-19 16:24:35 +00:00
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*
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2008-04-23 17:51:14 +00:00
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*
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* Add Hardware ECC support for AT91SAM9260 / AT91SAM9263
|
2012-06-29 09:47:55 +00:00
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* Richard Genoud (richard.genoud@gmail.com), Adeneo Copyright © 2007
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2008-04-23 17:51:14 +00:00
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*
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* Derived from Das U-Boot source code
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* (u-boot-1.1.5/board/atmel/at91sam9263ek/nand.c)
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2012-06-29 09:47:55 +00:00
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* © Copyright 2006 ATMEL Rousset, Lacressonniere Nicolas
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2008-04-23 17:51:14 +00:00
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*
|
2012-06-29 09:47:55 +00:00
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* Add Programmable Multibit ECC support for various AT91 SoC
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* © Copyright 2012 ATMEL, Hong Xu
|
2008-04-23 17:51:14 +00:00
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*
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2006-10-19 16:24:35 +00:00
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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2011-06-16 11:01:34 +00:00
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#include <linux/dma-mapping.h>
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2006-10-19 16:24:35 +00:00
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#include <linux/slab.h>
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#include <linux/module.h>
|
2009-05-27 15:19:39 +00:00
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|
|
#include <linux/moduleparam.h>
|
2006-10-19 16:24:35 +00:00
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#include <linux/platform_device.h>
|
2012-01-25 18:11:06 +00:00
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|
|
#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_gpio.h>
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|
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#include <linux/of_mtd.h>
|
2006-10-19 16:24:35 +00:00
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|
#include <linux/mtd/mtd.h>
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#include <linux/mtd/nand.h>
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#include <linux/mtd/partitions.h>
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|
2011-04-13 13:55:17 +00:00
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#include <linux/dmaengine.h>
|
2008-06-07 07:49:00 +00:00
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#include <linux/gpio.h>
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#include <linux/io.h>
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2011-12-29 06:43:24 +00:00
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#include <linux/platform_data/atmel.h>
|
2012-07-12 15:31:39 +00:00
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#include <linux/pinctrl/consumer.h>
|
2006-10-19 16:24:35 +00:00
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|
2008-08-05 15:14:15 +00:00
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#include <mach/cpu.h>
|
2006-10-19 16:24:35 +00:00
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|
2011-01-18 06:36:05 +00:00
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|
static int use_dma = 1;
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module_param(use_dma, int, 0);
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|
|
2009-05-27 15:19:39 +00:00
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static int on_flash_bbt = 0;
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module_param(on_flash_bbt, int, 0);
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|
2008-04-23 17:51:14 +00:00
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/* Register access macros */
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|
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#define ecc_readl(add, reg) \
|
2008-06-06 16:04:53 +00:00
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|
__raw_readl(add + ATMEL_ECC_##reg)
|
2008-04-23 17:51:14 +00:00
|
|
|
#define ecc_writel(add, reg, value) \
|
2008-06-06 16:04:53 +00:00
|
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|
__raw_writel((value), add + ATMEL_ECC_##reg)
|
2008-04-23 17:51:14 +00:00
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|
2008-06-06 16:04:52 +00:00
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#include "atmel_nand_ecc.h" /* Hardware ECC registers */
|
2008-04-23 17:51:14 +00:00
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/* oob layout for large page size
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|
* bad block info is on bytes 0 and 1
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|
* the bytes have to be consecutives to avoid
|
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|
|
* several NAND_CMD_RNDOUT during read
|
|
|
|
*/
|
2008-06-06 16:04:53 +00:00
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|
|
static struct nand_ecclayout atmel_oobinfo_large = {
|
2008-04-23 17:51:14 +00:00
|
|
|
.eccbytes = 4,
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|
|
.eccpos = {60, 61, 62, 63},
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|
|
.oobfree = {
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|
|
|
{2, 58}
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|
|
|
},
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|
|
};
|
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|
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|
|
|
/* oob layout for small page size
|
|
|
|
* bad block info is on bytes 4 and 5
|
|
|
|
* the bytes have to be consecutives to avoid
|
|
|
|
* several NAND_CMD_RNDOUT during read
|
|
|
|
*/
|
2008-06-06 16:04:53 +00:00
|
|
|
static struct nand_ecclayout atmel_oobinfo_small = {
|
2008-04-23 17:51:14 +00:00
|
|
|
.eccbytes = 4,
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|
|
.eccpos = {0, 1, 2, 3},
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|
|
.oobfree = {
|
|
|
|
{6, 10}
|
|
|
|
},
|
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|
|
};
|
|
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|
2008-06-06 16:04:53 +00:00
|
|
|
struct atmel_nand_host {
|
2006-10-19 16:24:35 +00:00
|
|
|
struct nand_chip nand_chip;
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|
struct mtd_info mtd;
|
|
|
|
void __iomem *io_base;
|
2011-01-18 06:36:05 +00:00
|
|
|
dma_addr_t io_phys;
|
2012-01-25 18:11:06 +00:00
|
|
|
struct atmel_nand_data board;
|
2008-04-23 17:51:14 +00:00
|
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|
struct device *dev;
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|
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|
void __iomem *ecc;
|
2011-01-18 06:36:05 +00:00
|
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|
|
struct completion comp;
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|
|
struct dma_chan *dma_chan;
|
2012-06-29 09:47:54 +00:00
|
|
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|
|
|
bool has_pmecc;
|
|
|
|
u8 pmecc_corr_cap;
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|
|
u16 pmecc_sector_size;
|
|
|
|
u32 pmecc_lookup_table_offset;
|
2012-06-29 09:47:55 +00:00
|
|
|
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|
|
int pmecc_bytes_per_sector;
|
|
|
|
int pmecc_sector_number;
|
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|
|
int pmecc_degree; /* Degree of remainders */
|
|
|
|
int pmecc_cw_len; /* Length of codeword */
|
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|
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|
void __iomem *pmerrloc_base;
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|
void __iomem *pmecc_rom_base;
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|
|
/* lookup table for alpha_to and index_of */
|
|
|
|
void __iomem *pmecc_alpha_to;
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|
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|
void __iomem *pmecc_index_of;
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|
|
|
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|
|
/* data for pmecc computation */
|
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|
int16_t *pmecc_partial_syn;
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|
int16_t *pmecc_si;
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|
int16_t *pmecc_smu; /* Sigma table */
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|
int16_t *pmecc_lmu; /* polynomal order */
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|
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|
int *pmecc_mu;
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|
int *pmecc_dmu;
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|
int *pmecc_delta;
|
2006-10-19 16:24:35 +00:00
|
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|
};
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|
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|
2012-06-29 09:47:55 +00:00
|
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|
static struct nand_ecclayout atmel_pmecc_oobinfo;
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|
2011-01-18 06:36:05 +00:00
|
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|
static int cpu_has_dma(void)
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|
|
|
{
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|
return cpu_is_at91sam9rl() || cpu_is_at91sam9g45();
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}
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|
2008-04-26 16:51:12 +00:00
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/*
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* Enable NAND.
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|
*/
|
2008-06-06 16:04:53 +00:00
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static void atmel_nand_enable(struct atmel_nand_host *host)
|
2008-04-26 16:51:12 +00:00
|
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|
{
|
2012-01-25 18:11:06 +00:00
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if (gpio_is_valid(host->board.enable_pin))
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gpio_set_value(host->board.enable_pin, 0);
|
2008-04-26 16:51:12 +00:00
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}
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/*
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* Disable NAND.
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*/
|
2008-06-06 16:04:53 +00:00
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static void atmel_nand_disable(struct atmel_nand_host *host)
|
2008-04-26 16:51:12 +00:00
|
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|
{
|
2012-01-25 18:11:06 +00:00
|
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|
if (gpio_is_valid(host->board.enable_pin))
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gpio_set_value(host->board.enable_pin, 1);
|
2008-04-26 16:51:12 +00:00
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}
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|
2006-10-19 16:24:35 +00:00
|
|
|
/*
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|
|
* Hardware specific access to control-lines
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*/
|
2008-06-06 16:04:53 +00:00
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|
static void atmel_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
|
2006-10-19 16:24:35 +00:00
|
|
|
{
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|
struct nand_chip *nand_chip = mtd->priv;
|
2008-06-06 16:04:53 +00:00
|
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|
struct atmel_nand_host *host = nand_chip->priv;
|
2006-10-19 16:24:35 +00:00
|
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|
|
2008-04-26 16:51:12 +00:00
|
|
|
if (ctrl & NAND_CTRL_CHANGE) {
|
2008-04-24 14:51:29 +00:00
|
|
|
if (ctrl & NAND_NCE)
|
2008-06-06 16:04:53 +00:00
|
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|
atmel_nand_enable(host);
|
2008-04-24 14:51:29 +00:00
|
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|
else
|
2008-06-06 16:04:53 +00:00
|
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|
atmel_nand_disable(host);
|
2008-04-24 14:51:29 +00:00
|
|
|
}
|
2006-10-19 16:24:35 +00:00
|
|
|
if (cmd == NAND_CMD_NONE)
|
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|
return;
|
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|
|
|
|
|
|
if (ctrl & NAND_CLE)
|
2012-01-25 18:11:06 +00:00
|
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|
writeb(cmd, host->io_base + (1 << host->board.cle));
|
2006-10-19 16:24:35 +00:00
|
|
|
else
|
2012-01-25 18:11:06 +00:00
|
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|
writeb(cmd, host->io_base + (1 << host->board.ale));
|
2006-10-19 16:24:35 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Read the Device Ready pin.
|
|
|
|
*/
|
2008-06-06 16:04:53 +00:00
|
|
|
static int atmel_nand_device_ready(struct mtd_info *mtd)
|
2006-10-19 16:24:35 +00:00
|
|
|
{
|
|
|
|
struct nand_chip *nand_chip = mtd->priv;
|
2008-06-06 16:04:53 +00:00
|
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|
struct atmel_nand_host *host = nand_chip->priv;
|
2006-10-19 16:24:35 +00:00
|
|
|
|
2012-01-25 18:11:06 +00:00
|
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|
return gpio_get_value(host->board.rdy_pin) ^
|
|
|
|
!!host->board.rdy_pin_active_low;
|
2006-10-19 16:24:35 +00:00
|
|
|
}
|
|
|
|
|
2012-02-02 11:54:25 +00:00
|
|
|
/*
|
|
|
|
* Minimal-overhead PIO for data access.
|
|
|
|
*/
|
|
|
|
static void atmel_read_buf8(struct mtd_info *mtd, u8 *buf, int len)
|
|
|
|
{
|
|
|
|
struct nand_chip *nand_chip = mtd->priv;
|
|
|
|
|
|
|
|
__raw_readsb(nand_chip->IO_ADDR_R, buf, len);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void atmel_read_buf16(struct mtd_info *mtd, u8 *buf, int len)
|
|
|
|
{
|
|
|
|
struct nand_chip *nand_chip = mtd->priv;
|
|
|
|
|
|
|
|
__raw_readsw(nand_chip->IO_ADDR_R, buf, len / 2);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void atmel_write_buf8(struct mtd_info *mtd, const u8 *buf, int len)
|
|
|
|
{
|
|
|
|
struct nand_chip *nand_chip = mtd->priv;
|
|
|
|
|
|
|
|
__raw_writesb(nand_chip->IO_ADDR_W, buf, len);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void atmel_write_buf16(struct mtd_info *mtd, const u8 *buf, int len)
|
|
|
|
{
|
|
|
|
struct nand_chip *nand_chip = mtd->priv;
|
|
|
|
|
|
|
|
__raw_writesw(nand_chip->IO_ADDR_W, buf, len / 2);
|
|
|
|
}
|
|
|
|
|
2011-01-18 06:36:05 +00:00
|
|
|
static void dma_complete_func(void *completion)
|
|
|
|
{
|
|
|
|
complete(completion);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int atmel_nand_dma_op(struct mtd_info *mtd, void *buf, int len,
|
|
|
|
int is_read)
|
|
|
|
{
|
|
|
|
struct dma_device *dma_dev;
|
|
|
|
enum dma_ctrl_flags flags;
|
|
|
|
dma_addr_t dma_src_addr, dma_dst_addr, phys_addr;
|
|
|
|
struct dma_async_tx_descriptor *tx = NULL;
|
|
|
|
dma_cookie_t cookie;
|
|
|
|
struct nand_chip *chip = mtd->priv;
|
|
|
|
struct atmel_nand_host *host = chip->priv;
|
|
|
|
void *p = buf;
|
|
|
|
int err = -EIO;
|
|
|
|
enum dma_data_direction dir = is_read ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
|
|
|
|
|
2011-03-31 10:33:15 +00:00
|
|
|
if (buf >= high_memory)
|
|
|
|
goto err_buf;
|
2011-01-18 06:36:05 +00:00
|
|
|
|
|
|
|
dma_dev = host->dma_chan->device;
|
|
|
|
|
|
|
|
flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT | DMA_COMPL_SKIP_SRC_UNMAP |
|
|
|
|
DMA_COMPL_SKIP_DEST_UNMAP;
|
|
|
|
|
|
|
|
phys_addr = dma_map_single(dma_dev->dev, p, len, dir);
|
|
|
|
if (dma_mapping_error(dma_dev->dev, phys_addr)) {
|
|
|
|
dev_err(host->dev, "Failed to dma_map_single\n");
|
|
|
|
goto err_buf;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (is_read) {
|
|
|
|
dma_src_addr = host->io_phys;
|
|
|
|
dma_dst_addr = phys_addr;
|
|
|
|
} else {
|
|
|
|
dma_src_addr = phys_addr;
|
|
|
|
dma_dst_addr = host->io_phys;
|
|
|
|
}
|
|
|
|
|
|
|
|
tx = dma_dev->device_prep_dma_memcpy(host->dma_chan, dma_dst_addr,
|
|
|
|
dma_src_addr, len, flags);
|
|
|
|
if (!tx) {
|
|
|
|
dev_err(host->dev, "Failed to prepare DMA memcpy\n");
|
|
|
|
goto err_dma;
|
|
|
|
}
|
|
|
|
|
|
|
|
init_completion(&host->comp);
|
|
|
|
tx->callback = dma_complete_func;
|
|
|
|
tx->callback_param = &host->comp;
|
|
|
|
|
|
|
|
cookie = tx->tx_submit(tx);
|
|
|
|
if (dma_submit_error(cookie)) {
|
|
|
|
dev_err(host->dev, "Failed to do DMA tx_submit\n");
|
|
|
|
goto err_dma;
|
|
|
|
}
|
|
|
|
|
|
|
|
dma_async_issue_pending(host->dma_chan);
|
|
|
|
wait_for_completion(&host->comp);
|
|
|
|
|
|
|
|
err = 0;
|
|
|
|
|
|
|
|
err_dma:
|
|
|
|
dma_unmap_single(dma_dev->dev, phys_addr, len, dir);
|
|
|
|
err_buf:
|
|
|
|
if (err != 0)
|
|
|
|
dev_warn(host->dev, "Fall back to CPU I/O\n");
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void atmel_read_buf(struct mtd_info *mtd, u8 *buf, int len)
|
|
|
|
{
|
|
|
|
struct nand_chip *chip = mtd->priv;
|
2012-02-02 11:54:25 +00:00
|
|
|
struct atmel_nand_host *host = chip->priv;
|
2011-01-18 06:36:05 +00:00
|
|
|
|
2011-04-01 14:40:44 +00:00
|
|
|
if (use_dma && len > mtd->oobsize)
|
|
|
|
/* only use DMA for bigger than oob size: better performances */
|
2011-01-18 06:36:05 +00:00
|
|
|
if (atmel_nand_dma_op(mtd, buf, len, 1) == 0)
|
|
|
|
return;
|
|
|
|
|
2012-01-25 18:11:06 +00:00
|
|
|
if (host->board.bus_width_16)
|
2012-02-02 11:54:25 +00:00
|
|
|
atmel_read_buf16(mtd, buf, len);
|
|
|
|
else
|
|
|
|
atmel_read_buf8(mtd, buf, len);
|
2011-01-18 06:36:05 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void atmel_write_buf(struct mtd_info *mtd, const u8 *buf, int len)
|
|
|
|
{
|
|
|
|
struct nand_chip *chip = mtd->priv;
|
2012-02-02 11:54:25 +00:00
|
|
|
struct atmel_nand_host *host = chip->priv;
|
2011-01-18 06:36:05 +00:00
|
|
|
|
2011-04-01 14:40:44 +00:00
|
|
|
if (use_dma && len > mtd->oobsize)
|
|
|
|
/* only use DMA for bigger than oob size: better performances */
|
2011-01-18 06:36:05 +00:00
|
|
|
if (atmel_nand_dma_op(mtd, (void *)buf, len, 0) == 0)
|
|
|
|
return;
|
|
|
|
|
2012-01-25 18:11:06 +00:00
|
|
|
if (host->board.bus_width_16)
|
2012-02-02 11:54:25 +00:00
|
|
|
atmel_write_buf16(mtd, buf, len);
|
|
|
|
else
|
|
|
|
atmel_write_buf8(mtd, buf, len);
|
2011-01-18 06:36:05 +00:00
|
|
|
}
|
|
|
|
|
2012-06-29 09:47:55 +00:00
|
|
|
/*
|
|
|
|
* Return number of ecc bytes per sector according to sector size and
|
|
|
|
* correction capability
|
|
|
|
*
|
|
|
|
* Following table shows what at91 PMECC supported:
|
|
|
|
* Correction Capability Sector_512_bytes Sector_1024_bytes
|
|
|
|
* ===================== ================ =================
|
|
|
|
* 2-bits 4-bytes 4-bytes
|
|
|
|
* 4-bits 7-bytes 7-bytes
|
|
|
|
* 8-bits 13-bytes 14-bytes
|
|
|
|
* 12-bits 20-bytes 21-bytes
|
|
|
|
* 24-bits 39-bytes 42-bytes
|
|
|
|
*/
|
2012-11-19 18:23:07 +00:00
|
|
|
static int pmecc_get_ecc_bytes(int cap, int sector_size)
|
2012-06-29 09:47:55 +00:00
|
|
|
{
|
|
|
|
int m = 12 + sector_size / 512;
|
|
|
|
return (m * cap + 7) / 8;
|
|
|
|
}
|
|
|
|
|
2012-11-19 18:23:07 +00:00
|
|
|
static void pmecc_config_ecc_layout(struct nand_ecclayout *layout,
|
2012-12-21 21:19:05 +00:00
|
|
|
int oobsize, int ecc_len)
|
2012-06-29 09:47:55 +00:00
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
layout->eccbytes = ecc_len;
|
|
|
|
|
|
|
|
/* ECC will occupy the last ecc_len bytes continuously */
|
|
|
|
for (i = 0; i < ecc_len; i++)
|
|
|
|
layout->eccpos[i] = oobsize - ecc_len + i;
|
|
|
|
|
|
|
|
layout->oobfree[0].offset = 2;
|
|
|
|
layout->oobfree[0].length =
|
|
|
|
oobsize - ecc_len - layout->oobfree[0].offset;
|
|
|
|
}
|
|
|
|
|
2012-11-19 18:23:07 +00:00
|
|
|
static void __iomem *pmecc_get_alpha_to(struct atmel_nand_host *host)
|
2012-06-29 09:47:55 +00:00
|
|
|
{
|
|
|
|
int table_size;
|
|
|
|
|
|
|
|
table_size = host->pmecc_sector_size == 512 ?
|
|
|
|
PMECC_LOOKUP_TABLE_SIZE_512 : PMECC_LOOKUP_TABLE_SIZE_1024;
|
|
|
|
|
|
|
|
return host->pmecc_rom_base + host->pmecc_lookup_table_offset +
|
|
|
|
table_size * sizeof(int16_t);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void pmecc_data_free(struct atmel_nand_host *host)
|
|
|
|
{
|
|
|
|
kfree(host->pmecc_partial_syn);
|
|
|
|
kfree(host->pmecc_si);
|
|
|
|
kfree(host->pmecc_lmu);
|
|
|
|
kfree(host->pmecc_smu);
|
|
|
|
kfree(host->pmecc_mu);
|
|
|
|
kfree(host->pmecc_dmu);
|
|
|
|
kfree(host->pmecc_delta);
|
|
|
|
}
|
|
|
|
|
2012-11-19 18:23:07 +00:00
|
|
|
static int pmecc_data_alloc(struct atmel_nand_host *host)
|
2012-06-29 09:47:55 +00:00
|
|
|
{
|
|
|
|
const int cap = host->pmecc_corr_cap;
|
|
|
|
|
|
|
|
host->pmecc_partial_syn = kzalloc((2 * cap + 1) * sizeof(int16_t),
|
|
|
|
GFP_KERNEL);
|
|
|
|
host->pmecc_si = kzalloc((2 * cap + 1) * sizeof(int16_t), GFP_KERNEL);
|
|
|
|
host->pmecc_lmu = kzalloc((cap + 1) * sizeof(int16_t), GFP_KERNEL);
|
|
|
|
host->pmecc_smu = kzalloc((cap + 2) * (2 * cap + 1) * sizeof(int16_t),
|
|
|
|
GFP_KERNEL);
|
|
|
|
host->pmecc_mu = kzalloc((cap + 1) * sizeof(int), GFP_KERNEL);
|
|
|
|
host->pmecc_dmu = kzalloc((cap + 1) * sizeof(int), GFP_KERNEL);
|
|
|
|
host->pmecc_delta = kzalloc((cap + 1) * sizeof(int), GFP_KERNEL);
|
|
|
|
|
|
|
|
if (host->pmecc_partial_syn &&
|
|
|
|
host->pmecc_si &&
|
|
|
|
host->pmecc_lmu &&
|
|
|
|
host->pmecc_smu &&
|
|
|
|
host->pmecc_mu &&
|
|
|
|
host->pmecc_dmu &&
|
|
|
|
host->pmecc_delta)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
/* error happened */
|
|
|
|
pmecc_data_free(host);
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void pmecc_gen_syndrome(struct mtd_info *mtd, int sector)
|
|
|
|
{
|
|
|
|
struct nand_chip *nand_chip = mtd->priv;
|
|
|
|
struct atmel_nand_host *host = nand_chip->priv;
|
|
|
|
int i;
|
|
|
|
uint32_t value;
|
|
|
|
|
|
|
|
/* Fill odd syndromes */
|
|
|
|
for (i = 0; i < host->pmecc_corr_cap; i++) {
|
|
|
|
value = pmecc_readl_rem_relaxed(host->ecc, sector, i / 2);
|
|
|
|
if (i & 1)
|
|
|
|
value >>= 16;
|
|
|
|
value &= 0xffff;
|
|
|
|
host->pmecc_partial_syn[(2 * i) + 1] = (int16_t)value;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void pmecc_substitute(struct mtd_info *mtd)
|
|
|
|
{
|
|
|
|
struct nand_chip *nand_chip = mtd->priv;
|
|
|
|
struct atmel_nand_host *host = nand_chip->priv;
|
|
|
|
int16_t __iomem *alpha_to = host->pmecc_alpha_to;
|
|
|
|
int16_t __iomem *index_of = host->pmecc_index_of;
|
|
|
|
int16_t *partial_syn = host->pmecc_partial_syn;
|
|
|
|
const int cap = host->pmecc_corr_cap;
|
|
|
|
int16_t *si;
|
|
|
|
int i, j;
|
|
|
|
|
|
|
|
/* si[] is a table that holds the current syndrome value,
|
|
|
|
* an element of that table belongs to the field
|
|
|
|
*/
|
|
|
|
si = host->pmecc_si;
|
|
|
|
|
|
|
|
memset(&si[1], 0, sizeof(int16_t) * (2 * cap - 1));
|
|
|
|
|
|
|
|
/* Computation 2t syndromes based on S(x) */
|
|
|
|
/* Odd syndromes */
|
|
|
|
for (i = 1; i < 2 * cap; i += 2) {
|
|
|
|
for (j = 0; j < host->pmecc_degree; j++) {
|
|
|
|
if (partial_syn[i] & ((unsigned short)0x1 << j))
|
|
|
|
si[i] = readw_relaxed(alpha_to + i * j) ^ si[i];
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/* Even syndrome = (Odd syndrome) ** 2 */
|
|
|
|
for (i = 2, j = 1; j <= cap; i = ++j << 1) {
|
|
|
|
if (si[j] == 0) {
|
|
|
|
si[i] = 0;
|
|
|
|
} else {
|
|
|
|
int16_t tmp;
|
|
|
|
|
|
|
|
tmp = readw_relaxed(index_of + si[j]);
|
|
|
|
tmp = (tmp * 2) % host->pmecc_cw_len;
|
|
|
|
si[i] = readw_relaxed(alpha_to + tmp);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void pmecc_get_sigma(struct mtd_info *mtd)
|
|
|
|
{
|
|
|
|
struct nand_chip *nand_chip = mtd->priv;
|
|
|
|
struct atmel_nand_host *host = nand_chip->priv;
|
|
|
|
|
|
|
|
int16_t *lmu = host->pmecc_lmu;
|
|
|
|
int16_t *si = host->pmecc_si;
|
|
|
|
int *mu = host->pmecc_mu;
|
|
|
|
int *dmu = host->pmecc_dmu; /* Discrepancy */
|
|
|
|
int *delta = host->pmecc_delta; /* Delta order */
|
|
|
|
int cw_len = host->pmecc_cw_len;
|
|
|
|
const int16_t cap = host->pmecc_corr_cap;
|
|
|
|
const int num = 2 * cap + 1;
|
|
|
|
int16_t __iomem *index_of = host->pmecc_index_of;
|
|
|
|
int16_t __iomem *alpha_to = host->pmecc_alpha_to;
|
|
|
|
int i, j, k;
|
|
|
|
uint32_t dmu_0_count, tmp;
|
|
|
|
int16_t *smu = host->pmecc_smu;
|
|
|
|
|
|
|
|
/* index of largest delta */
|
|
|
|
int ro;
|
|
|
|
int largest;
|
|
|
|
int diff;
|
|
|
|
|
|
|
|
dmu_0_count = 0;
|
|
|
|
|
|
|
|
/* First Row */
|
|
|
|
|
|
|
|
/* Mu */
|
|
|
|
mu[0] = -1;
|
|
|
|
|
|
|
|
memset(smu, 0, sizeof(int16_t) * num);
|
|
|
|
smu[0] = 1;
|
|
|
|
|
|
|
|
/* discrepancy set to 1 */
|
|
|
|
dmu[0] = 1;
|
|
|
|
/* polynom order set to 0 */
|
|
|
|
lmu[0] = 0;
|
|
|
|
delta[0] = (mu[0] * 2 - lmu[0]) >> 1;
|
|
|
|
|
|
|
|
/* Second Row */
|
|
|
|
|
|
|
|
/* Mu */
|
|
|
|
mu[1] = 0;
|
|
|
|
/* Sigma(x) set to 1 */
|
|
|
|
memset(&smu[num], 0, sizeof(int16_t) * num);
|
|
|
|
smu[num] = 1;
|
|
|
|
|
|
|
|
/* discrepancy set to S1 */
|
|
|
|
dmu[1] = si[1];
|
|
|
|
|
|
|
|
/* polynom order set to 0 */
|
|
|
|
lmu[1] = 0;
|
|
|
|
|
|
|
|
delta[1] = (mu[1] * 2 - lmu[1]) >> 1;
|
|
|
|
|
|
|
|
/* Init the Sigma(x) last row */
|
|
|
|
memset(&smu[(cap + 1) * num], 0, sizeof(int16_t) * num);
|
|
|
|
|
|
|
|
for (i = 1; i <= cap; i++) {
|
|
|
|
mu[i + 1] = i << 1;
|
|
|
|
/* Begin Computing Sigma (Mu+1) and L(mu) */
|
|
|
|
/* check if discrepancy is set to 0 */
|
|
|
|
if (dmu[i] == 0) {
|
|
|
|
dmu_0_count++;
|
|
|
|
|
|
|
|
tmp = ((cap - (lmu[i] >> 1) - 1) / 2);
|
|
|
|
if ((cap - (lmu[i] >> 1) - 1) & 0x1)
|
|
|
|
tmp += 2;
|
|
|
|
else
|
|
|
|
tmp += 1;
|
|
|
|
|
|
|
|
if (dmu_0_count == tmp) {
|
|
|
|
for (j = 0; j <= (lmu[i] >> 1) + 1; j++)
|
|
|
|
smu[(cap + 1) * num + j] =
|
|
|
|
smu[i * num + j];
|
|
|
|
|
|
|
|
lmu[cap + 1] = lmu[i];
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* copy polynom */
|
|
|
|
for (j = 0; j <= lmu[i] >> 1; j++)
|
|
|
|
smu[(i + 1) * num + j] = smu[i * num + j];
|
|
|
|
|
|
|
|
/* copy previous polynom order to the next */
|
|
|
|
lmu[i + 1] = lmu[i];
|
|
|
|
} else {
|
|
|
|
ro = 0;
|
|
|
|
largest = -1;
|
|
|
|
/* find largest delta with dmu != 0 */
|
|
|
|
for (j = 0; j < i; j++) {
|
|
|
|
if ((dmu[j]) && (delta[j] > largest)) {
|
|
|
|
largest = delta[j];
|
|
|
|
ro = j;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* compute difference */
|
|
|
|
diff = (mu[i] - mu[ro]);
|
|
|
|
|
|
|
|
/* Compute degree of the new smu polynomial */
|
|
|
|
if ((lmu[i] >> 1) > ((lmu[ro] >> 1) + diff))
|
|
|
|
lmu[i + 1] = lmu[i];
|
|
|
|
else
|
|
|
|
lmu[i + 1] = ((lmu[ro] >> 1) + diff) * 2;
|
|
|
|
|
|
|
|
/* Init smu[i+1] with 0 */
|
|
|
|
for (k = 0; k < num; k++)
|
|
|
|
smu[(i + 1) * num + k] = 0;
|
|
|
|
|
|
|
|
/* Compute smu[i+1] */
|
|
|
|
for (k = 0; k <= lmu[ro] >> 1; k++) {
|
|
|
|
int16_t a, b, c;
|
|
|
|
|
|
|
|
if (!(smu[ro * num + k] && dmu[i]))
|
|
|
|
continue;
|
|
|
|
a = readw_relaxed(index_of + dmu[i]);
|
|
|
|
b = readw_relaxed(index_of + dmu[ro]);
|
|
|
|
c = readw_relaxed(index_of + smu[ro * num + k]);
|
|
|
|
tmp = a + (cw_len - b) + c;
|
|
|
|
a = readw_relaxed(alpha_to + tmp % cw_len);
|
|
|
|
smu[(i + 1) * num + (k + diff)] = a;
|
|
|
|
}
|
|
|
|
|
|
|
|
for (k = 0; k <= lmu[i] >> 1; k++)
|
|
|
|
smu[(i + 1) * num + k] ^= smu[i * num + k];
|
|
|
|
}
|
|
|
|
|
|
|
|
/* End Computing Sigma (Mu+1) and L(mu) */
|
|
|
|
/* In either case compute delta */
|
|
|
|
delta[i + 1] = (mu[i + 1] * 2 - lmu[i + 1]) >> 1;
|
|
|
|
|
|
|
|
/* Do not compute discrepancy for the last iteration */
|
|
|
|
if (i >= cap)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
for (k = 0; k <= (lmu[i + 1] >> 1); k++) {
|
|
|
|
tmp = 2 * (i - 1);
|
|
|
|
if (k == 0) {
|
|
|
|
dmu[i + 1] = si[tmp + 3];
|
|
|
|
} else if (smu[(i + 1) * num + k] && si[tmp + 3 - k]) {
|
|
|
|
int16_t a, b, c;
|
|
|
|
a = readw_relaxed(index_of +
|
|
|
|
smu[(i + 1) * num + k]);
|
|
|
|
b = si[2 * (i - 1) + 3 - k];
|
|
|
|
c = readw_relaxed(index_of + b);
|
|
|
|
tmp = a + c;
|
|
|
|
tmp %= cw_len;
|
|
|
|
dmu[i + 1] = readw_relaxed(alpha_to + tmp) ^
|
|
|
|
dmu[i + 1];
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int pmecc_err_location(struct mtd_info *mtd)
|
|
|
|
{
|
|
|
|
struct nand_chip *nand_chip = mtd->priv;
|
|
|
|
struct atmel_nand_host *host = nand_chip->priv;
|
|
|
|
unsigned long end_time;
|
|
|
|
const int cap = host->pmecc_corr_cap;
|
|
|
|
const int num = 2 * cap + 1;
|
|
|
|
int sector_size = host->pmecc_sector_size;
|
|
|
|
int err_nbr = 0; /* number of error */
|
|
|
|
int roots_nbr; /* number of roots */
|
|
|
|
int i;
|
|
|
|
uint32_t val;
|
|
|
|
int16_t *smu = host->pmecc_smu;
|
|
|
|
|
|
|
|
pmerrloc_writel(host->pmerrloc_base, ELDIS, PMERRLOC_DISABLE);
|
|
|
|
|
|
|
|
for (i = 0; i <= host->pmecc_lmu[cap + 1] >> 1; i++) {
|
|
|
|
pmerrloc_writel_sigma_relaxed(host->pmerrloc_base, i,
|
|
|
|
smu[(cap + 1) * num + i]);
|
|
|
|
err_nbr++;
|
|
|
|
}
|
|
|
|
|
|
|
|
val = (err_nbr - 1) << 16;
|
|
|
|
if (sector_size == 1024)
|
|
|
|
val |= 1;
|
|
|
|
|
|
|
|
pmerrloc_writel(host->pmerrloc_base, ELCFG, val);
|
|
|
|
pmerrloc_writel(host->pmerrloc_base, ELEN,
|
|
|
|
sector_size * 8 + host->pmecc_degree * cap);
|
|
|
|
|
|
|
|
end_time = jiffies + msecs_to_jiffies(PMECC_MAX_TIMEOUT_MS);
|
|
|
|
while (!(pmerrloc_readl_relaxed(host->pmerrloc_base, ELISR)
|
|
|
|
& PMERRLOC_CALC_DONE)) {
|
|
|
|
if (unlikely(time_after(jiffies, end_time))) {
|
|
|
|
dev_err(host->dev, "PMECC: Timeout to calculate error location.\n");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
cpu_relax();
|
|
|
|
}
|
|
|
|
|
|
|
|
roots_nbr = (pmerrloc_readl_relaxed(host->pmerrloc_base, ELISR)
|
|
|
|
& PMERRLOC_ERR_NUM_MASK) >> 8;
|
|
|
|
/* Number of roots == degree of smu hence <= cap */
|
|
|
|
if (roots_nbr == host->pmecc_lmu[cap + 1] >> 1)
|
|
|
|
return err_nbr - 1;
|
|
|
|
|
|
|
|
/* Number of roots does not match the degree of smu
|
|
|
|
* unable to correct error */
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void pmecc_correct_data(struct mtd_info *mtd, uint8_t *buf, uint8_t *ecc,
|
|
|
|
int sector_num, int extra_bytes, int err_nbr)
|
|
|
|
{
|
|
|
|
struct nand_chip *nand_chip = mtd->priv;
|
|
|
|
struct atmel_nand_host *host = nand_chip->priv;
|
|
|
|
int i = 0;
|
|
|
|
int byte_pos, bit_pos, sector_size, pos;
|
|
|
|
uint32_t tmp;
|
|
|
|
uint8_t err_byte;
|
|
|
|
|
|
|
|
sector_size = host->pmecc_sector_size;
|
|
|
|
|
|
|
|
while (err_nbr) {
|
|
|
|
tmp = pmerrloc_readl_el_relaxed(host->pmerrloc_base, i) - 1;
|
|
|
|
byte_pos = tmp / 8;
|
|
|
|
bit_pos = tmp % 8;
|
|
|
|
|
|
|
|
if (byte_pos >= (sector_size + extra_bytes))
|
|
|
|
BUG(); /* should never happen */
|
|
|
|
|
|
|
|
if (byte_pos < sector_size) {
|
|
|
|
err_byte = *(buf + byte_pos);
|
|
|
|
*(buf + byte_pos) ^= (1 << bit_pos);
|
|
|
|
|
|
|
|
pos = sector_num * host->pmecc_sector_size + byte_pos;
|
|
|
|
dev_info(host->dev, "Bit flip in data area, byte_pos: %d, bit_pos: %d, 0x%02x -> 0x%02x\n",
|
|
|
|
pos, bit_pos, err_byte, *(buf + byte_pos));
|
|
|
|
} else {
|
|
|
|
/* Bit flip in OOB area */
|
|
|
|
tmp = sector_num * host->pmecc_bytes_per_sector
|
|
|
|
+ (byte_pos - sector_size);
|
|
|
|
err_byte = ecc[tmp];
|
|
|
|
ecc[tmp] ^= (1 << bit_pos);
|
|
|
|
|
|
|
|
pos = tmp + nand_chip->ecc.layout->eccpos[0];
|
|
|
|
dev_info(host->dev, "Bit flip in OOB, oob_byte_pos: %d, bit_pos: %d, 0x%02x -> 0x%02x\n",
|
|
|
|
pos, bit_pos, err_byte, ecc[tmp]);
|
|
|
|
}
|
|
|
|
|
|
|
|
i++;
|
|
|
|
err_nbr--;
|
|
|
|
}
|
|
|
|
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int pmecc_correction(struct mtd_info *mtd, u32 pmecc_stat, uint8_t *buf,
|
|
|
|
u8 *ecc)
|
|
|
|
{
|
|
|
|
struct nand_chip *nand_chip = mtd->priv;
|
|
|
|
struct atmel_nand_host *host = nand_chip->priv;
|
|
|
|
int i, err_nbr, eccbytes;
|
|
|
|
uint8_t *buf_pos;
|
2012-11-27 10:50:31 +00:00
|
|
|
int total_err = 0;
|
2012-06-29 09:47:55 +00:00
|
|
|
|
|
|
|
eccbytes = nand_chip->ecc.bytes;
|
|
|
|
for (i = 0; i < eccbytes; i++)
|
|
|
|
if (ecc[i] != 0xff)
|
|
|
|
goto normal_check;
|
|
|
|
/* Erased page, return OK */
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
normal_check:
|
|
|
|
for (i = 0; i < host->pmecc_sector_number; i++) {
|
|
|
|
err_nbr = 0;
|
|
|
|
if (pmecc_stat & 0x1) {
|
|
|
|
buf_pos = buf + i * host->pmecc_sector_size;
|
|
|
|
|
|
|
|
pmecc_gen_syndrome(mtd, i);
|
|
|
|
pmecc_substitute(mtd);
|
|
|
|
pmecc_get_sigma(mtd);
|
|
|
|
|
|
|
|
err_nbr = pmecc_err_location(mtd);
|
|
|
|
if (err_nbr == -1) {
|
|
|
|
dev_err(host->dev, "PMECC: Too many errors\n");
|
|
|
|
mtd->ecc_stats.failed++;
|
|
|
|
return -EIO;
|
|
|
|
} else {
|
|
|
|
pmecc_correct_data(mtd, buf_pos, ecc, i,
|
|
|
|
host->pmecc_bytes_per_sector, err_nbr);
|
|
|
|
mtd->ecc_stats.corrected += err_nbr;
|
2012-11-27 10:50:31 +00:00
|
|
|
total_err += err_nbr;
|
2012-06-29 09:47:55 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
pmecc_stat >>= 1;
|
|
|
|
}
|
|
|
|
|
2012-11-27 10:50:31 +00:00
|
|
|
return total_err;
|
2012-06-29 09:47:55 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static int atmel_nand_pmecc_read_page(struct mtd_info *mtd,
|
|
|
|
struct nand_chip *chip, uint8_t *buf, int oob_required, int page)
|
|
|
|
{
|
|
|
|
struct atmel_nand_host *host = chip->priv;
|
|
|
|
int eccsize = chip->ecc.size;
|
|
|
|
uint8_t *oob = chip->oob_poi;
|
|
|
|
uint32_t *eccpos = chip->ecc.layout->eccpos;
|
|
|
|
uint32_t stat;
|
|
|
|
unsigned long end_time;
|
2012-11-27 10:50:31 +00:00
|
|
|
int bitflips = 0;
|
2012-06-29 09:47:55 +00:00
|
|
|
|
|
|
|
pmecc_writel(host->ecc, CTRL, PMECC_CTRL_RST);
|
|
|
|
pmecc_writel(host->ecc, CTRL, PMECC_CTRL_DISABLE);
|
|
|
|
pmecc_writel(host->ecc, CFG, (pmecc_readl_relaxed(host->ecc, CFG)
|
|
|
|
& ~PMECC_CFG_WRITE_OP) | PMECC_CFG_AUTO_ENABLE);
|
|
|
|
|
|
|
|
pmecc_writel(host->ecc, CTRL, PMECC_CTRL_ENABLE);
|
|
|
|
pmecc_writel(host->ecc, CTRL, PMECC_CTRL_DATA);
|
|
|
|
|
|
|
|
chip->read_buf(mtd, buf, eccsize);
|
|
|
|
chip->read_buf(mtd, oob, mtd->oobsize);
|
|
|
|
|
|
|
|
end_time = jiffies + msecs_to_jiffies(PMECC_MAX_TIMEOUT_MS);
|
|
|
|
while ((pmecc_readl_relaxed(host->ecc, SR) & PMECC_SR_BUSY)) {
|
|
|
|
if (unlikely(time_after(jiffies, end_time))) {
|
|
|
|
dev_err(host->dev, "PMECC: Timeout to get error status.\n");
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
cpu_relax();
|
|
|
|
}
|
|
|
|
|
|
|
|
stat = pmecc_readl_relaxed(host->ecc, ISR);
|
2012-11-27 10:50:31 +00:00
|
|
|
if (stat != 0) {
|
|
|
|
bitflips = pmecc_correction(mtd, stat, buf, &oob[eccpos[0]]);
|
|
|
|
if (bitflips < 0)
|
|
|
|
/* uncorrectable errors */
|
|
|
|
return 0;
|
|
|
|
}
|
2012-06-29 09:47:55 +00:00
|
|
|
|
2012-11-27 10:50:31 +00:00
|
|
|
return bitflips;
|
2012-06-29 09:47:55 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static int atmel_nand_pmecc_write_page(struct mtd_info *mtd,
|
|
|
|
struct nand_chip *chip, const uint8_t *buf, int oob_required)
|
|
|
|
{
|
|
|
|
struct atmel_nand_host *host = chip->priv;
|
|
|
|
uint32_t *eccpos = chip->ecc.layout->eccpos;
|
|
|
|
int i, j;
|
|
|
|
unsigned long end_time;
|
|
|
|
|
|
|
|
pmecc_writel(host->ecc, CTRL, PMECC_CTRL_RST);
|
|
|
|
pmecc_writel(host->ecc, CTRL, PMECC_CTRL_DISABLE);
|
|
|
|
|
|
|
|
pmecc_writel(host->ecc, CFG, (pmecc_readl_relaxed(host->ecc, CFG) |
|
|
|
|
PMECC_CFG_WRITE_OP) & ~PMECC_CFG_AUTO_ENABLE);
|
|
|
|
|
|
|
|
pmecc_writel(host->ecc, CTRL, PMECC_CTRL_ENABLE);
|
|
|
|
pmecc_writel(host->ecc, CTRL, PMECC_CTRL_DATA);
|
|
|
|
|
|
|
|
chip->write_buf(mtd, (u8 *)buf, mtd->writesize);
|
|
|
|
|
|
|
|
end_time = jiffies + msecs_to_jiffies(PMECC_MAX_TIMEOUT_MS);
|
|
|
|
while ((pmecc_readl_relaxed(host->ecc, SR) & PMECC_SR_BUSY)) {
|
|
|
|
if (unlikely(time_after(jiffies, end_time))) {
|
|
|
|
dev_err(host->dev, "PMECC: Timeout to get ECC value.\n");
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
cpu_relax();
|
|
|
|
}
|
|
|
|
|
|
|
|
for (i = 0; i < host->pmecc_sector_number; i++) {
|
|
|
|
for (j = 0; j < host->pmecc_bytes_per_sector; j++) {
|
|
|
|
int pos;
|
|
|
|
|
|
|
|
pos = i * host->pmecc_bytes_per_sector + j;
|
|
|
|
chip->oob_poi[eccpos[pos]] =
|
|
|
|
pmecc_readb_ecc_relaxed(host->ecc, i, j);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void atmel_pmecc_core_init(struct mtd_info *mtd)
|
|
|
|
{
|
|
|
|
struct nand_chip *nand_chip = mtd->priv;
|
|
|
|
struct atmel_nand_host *host = nand_chip->priv;
|
|
|
|
uint32_t val = 0;
|
|
|
|
struct nand_ecclayout *ecc_layout;
|
|
|
|
|
|
|
|
pmecc_writel(host->ecc, CTRL, PMECC_CTRL_RST);
|
|
|
|
pmecc_writel(host->ecc, CTRL, PMECC_CTRL_DISABLE);
|
|
|
|
|
|
|
|
switch (host->pmecc_corr_cap) {
|
|
|
|
case 2:
|
|
|
|
val = PMECC_CFG_BCH_ERR2;
|
|
|
|
break;
|
|
|
|
case 4:
|
|
|
|
val = PMECC_CFG_BCH_ERR4;
|
|
|
|
break;
|
|
|
|
case 8:
|
|
|
|
val = PMECC_CFG_BCH_ERR8;
|
|
|
|
break;
|
|
|
|
case 12:
|
|
|
|
val = PMECC_CFG_BCH_ERR12;
|
|
|
|
break;
|
|
|
|
case 24:
|
|
|
|
val = PMECC_CFG_BCH_ERR24;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (host->pmecc_sector_size == 512)
|
|
|
|
val |= PMECC_CFG_SECTOR512;
|
|
|
|
else if (host->pmecc_sector_size == 1024)
|
|
|
|
val |= PMECC_CFG_SECTOR1024;
|
|
|
|
|
|
|
|
switch (host->pmecc_sector_number) {
|
|
|
|
case 1:
|
|
|
|
val |= PMECC_CFG_PAGE_1SECTOR;
|
|
|
|
break;
|
|
|
|
case 2:
|
|
|
|
val |= PMECC_CFG_PAGE_2SECTORS;
|
|
|
|
break;
|
|
|
|
case 4:
|
|
|
|
val |= PMECC_CFG_PAGE_4SECTORS;
|
|
|
|
break;
|
|
|
|
case 8:
|
|
|
|
val |= PMECC_CFG_PAGE_8SECTORS;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
val |= (PMECC_CFG_READ_OP | PMECC_CFG_SPARE_DISABLE
|
|
|
|
| PMECC_CFG_AUTO_DISABLE);
|
|
|
|
pmecc_writel(host->ecc, CFG, val);
|
|
|
|
|
|
|
|
ecc_layout = nand_chip->ecc.layout;
|
|
|
|
pmecc_writel(host->ecc, SAREA, mtd->oobsize - 1);
|
|
|
|
pmecc_writel(host->ecc, SADDR, ecc_layout->eccpos[0]);
|
|
|
|
pmecc_writel(host->ecc, EADDR,
|
|
|
|
ecc_layout->eccpos[ecc_layout->eccbytes - 1]);
|
|
|
|
/* See datasheet about PMECC Clock Control Register */
|
|
|
|
pmecc_writel(host->ecc, CLK, 2);
|
|
|
|
pmecc_writel(host->ecc, IDR, 0xff);
|
|
|
|
pmecc_writel(host->ecc, CTRL, PMECC_CTRL_ENABLE);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int __init atmel_pmecc_nand_init_params(struct platform_device *pdev,
|
|
|
|
struct atmel_nand_host *host)
|
|
|
|
{
|
|
|
|
struct mtd_info *mtd = &host->mtd;
|
|
|
|
struct nand_chip *nand_chip = &host->nand_chip;
|
|
|
|
struct resource *regs, *regs_pmerr, *regs_rom;
|
|
|
|
int cap, sector_size, err_no;
|
|
|
|
|
|
|
|
cap = host->pmecc_corr_cap;
|
|
|
|
sector_size = host->pmecc_sector_size;
|
|
|
|
dev_info(host->dev, "Initialize PMECC params, cap: %d, sector: %d\n",
|
|
|
|
cap, sector_size);
|
|
|
|
|
|
|
|
regs = platform_get_resource(pdev, IORESOURCE_MEM, 1);
|
|
|
|
if (!regs) {
|
|
|
|
dev_warn(host->dev,
|
|
|
|
"Can't get I/O resource regs for PMECC controller, rolling back on software ECC\n");
|
|
|
|
nand_chip->ecc.mode = NAND_ECC_SOFT;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
host->ecc = ioremap(regs->start, resource_size(regs));
|
|
|
|
if (host->ecc == NULL) {
|
|
|
|
dev_err(host->dev, "ioremap failed\n");
|
|
|
|
err_no = -EIO;
|
|
|
|
goto err_pmecc_ioremap;
|
|
|
|
}
|
|
|
|
|
|
|
|
regs_pmerr = platform_get_resource(pdev, IORESOURCE_MEM, 2);
|
|
|
|
regs_rom = platform_get_resource(pdev, IORESOURCE_MEM, 3);
|
|
|
|
if (regs_pmerr && regs_rom) {
|
|
|
|
host->pmerrloc_base = ioremap(regs_pmerr->start,
|
|
|
|
resource_size(regs_pmerr));
|
|
|
|
host->pmecc_rom_base = ioremap(regs_rom->start,
|
|
|
|
resource_size(regs_rom));
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!host->pmerrloc_base || !host->pmecc_rom_base) {
|
|
|
|
dev_err(host->dev,
|
|
|
|
"Can not get I/O resource for PMECC ERRLOC controller or ROM!\n");
|
|
|
|
err_no = -EIO;
|
|
|
|
goto err_pmloc_ioremap;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* ECC is calculated for the whole page (1 step) */
|
|
|
|
nand_chip->ecc.size = mtd->writesize;
|
|
|
|
|
|
|
|
/* set ECC page size and oob layout */
|
|
|
|
switch (mtd->writesize) {
|
|
|
|
case 2048:
|
|
|
|
host->pmecc_degree = PMECC_GF_DIMENSION_13;
|
|
|
|
host->pmecc_cw_len = (1 << host->pmecc_degree) - 1;
|
|
|
|
host->pmecc_sector_number = mtd->writesize / sector_size;
|
|
|
|
host->pmecc_bytes_per_sector = pmecc_get_ecc_bytes(
|
|
|
|
cap, sector_size);
|
|
|
|
host->pmecc_alpha_to = pmecc_get_alpha_to(host);
|
|
|
|
host->pmecc_index_of = host->pmecc_rom_base +
|
|
|
|
host->pmecc_lookup_table_offset;
|
|
|
|
|
|
|
|
nand_chip->ecc.steps = 1;
|
|
|
|
nand_chip->ecc.strength = cap;
|
|
|
|
nand_chip->ecc.bytes = host->pmecc_bytes_per_sector *
|
|
|
|
host->pmecc_sector_number;
|
|
|
|
if (nand_chip->ecc.bytes > mtd->oobsize - 2) {
|
|
|
|
dev_err(host->dev, "No room for ECC bytes\n");
|
|
|
|
err_no = -EINVAL;
|
|
|
|
goto err_no_ecc_room;
|
|
|
|
}
|
|
|
|
pmecc_config_ecc_layout(&atmel_pmecc_oobinfo,
|
|
|
|
mtd->oobsize,
|
|
|
|
nand_chip->ecc.bytes);
|
|
|
|
nand_chip->ecc.layout = &atmel_pmecc_oobinfo;
|
|
|
|
break;
|
|
|
|
case 512:
|
|
|
|
case 1024:
|
|
|
|
case 4096:
|
|
|
|
/* TODO */
|
|
|
|
dev_warn(host->dev,
|
|
|
|
"Unsupported page size for PMECC, use Software ECC\n");
|
|
|
|
default:
|
|
|
|
/* page size not handled by HW ECC */
|
|
|
|
/* switching back to soft ECC */
|
|
|
|
nand_chip->ecc.mode = NAND_ECC_SOFT;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Allocate data for PMECC computation */
|
|
|
|
err_no = pmecc_data_alloc(host);
|
|
|
|
if (err_no) {
|
|
|
|
dev_err(host->dev,
|
|
|
|
"Cannot allocate memory for PMECC computation!\n");
|
|
|
|
goto err_pmecc_data_alloc;
|
|
|
|
}
|
|
|
|
|
|
|
|
nand_chip->ecc.read_page = atmel_nand_pmecc_read_page;
|
|
|
|
nand_chip->ecc.write_page = atmel_nand_pmecc_write_page;
|
|
|
|
|
|
|
|
atmel_pmecc_core_init(mtd);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
err_pmecc_data_alloc:
|
|
|
|
err_no_ecc_room:
|
|
|
|
err_pmloc_ioremap:
|
|
|
|
iounmap(host->ecc);
|
|
|
|
if (host->pmerrloc_base)
|
|
|
|
iounmap(host->pmerrloc_base);
|
|
|
|
if (host->pmecc_rom_base)
|
|
|
|
iounmap(host->pmecc_rom_base);
|
|
|
|
err_pmecc_ioremap:
|
|
|
|
return err_no;
|
|
|
|
}
|
|
|
|
|
2008-04-23 17:51:14 +00:00
|
|
|
/*
|
|
|
|
* Calculate HW ECC
|
|
|
|
*
|
|
|
|
* function called after a write
|
|
|
|
*
|
|
|
|
* mtd: MTD block structure
|
|
|
|
* dat: raw data (unused)
|
|
|
|
* ecc_code: buffer for ECC
|
|
|
|
*/
|
2008-06-06 16:04:53 +00:00
|
|
|
static int atmel_nand_calculate(struct mtd_info *mtd,
|
2008-04-23 17:51:14 +00:00
|
|
|
const u_char *dat, unsigned char *ecc_code)
|
|
|
|
{
|
|
|
|
struct nand_chip *nand_chip = mtd->priv;
|
2008-06-06 16:04:53 +00:00
|
|
|
struct atmel_nand_host *host = nand_chip->priv;
|
2008-04-23 17:51:14 +00:00
|
|
|
unsigned int ecc_value;
|
|
|
|
|
|
|
|
/* get the first 2 ECC bytes */
|
2008-04-25 07:32:26 +00:00
|
|
|
ecc_value = ecc_readl(host->ecc, PR);
|
2008-04-23 17:51:14 +00:00
|
|
|
|
2008-10-12 06:42:28 +00:00
|
|
|
ecc_code[0] = ecc_value & 0xFF;
|
|
|
|
ecc_code[1] = (ecc_value >> 8) & 0xFF;
|
2008-04-23 17:51:14 +00:00
|
|
|
|
|
|
|
/* get the last 2 ECC bytes */
|
2008-06-06 16:04:53 +00:00
|
|
|
ecc_value = ecc_readl(host->ecc, NPR) & ATMEL_ECC_NPARITY;
|
2008-04-23 17:51:14 +00:00
|
|
|
|
2008-10-12 06:42:28 +00:00
|
|
|
ecc_code[2] = ecc_value & 0xFF;
|
|
|
|
ecc_code[3] = (ecc_value >> 8) & 0xFF;
|
2008-04-23 17:51:14 +00:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* HW ECC read page function
|
|
|
|
*
|
|
|
|
* mtd: mtd info structure
|
|
|
|
* chip: nand chip info structure
|
|
|
|
* buf: buffer to store read data
|
2012-05-02 17:14:55 +00:00
|
|
|
* oob_required: caller expects OOB data read to chip->oob_poi
|
2008-04-23 17:51:14 +00:00
|
|
|
*/
|
2012-05-02 17:14:55 +00:00
|
|
|
static int atmel_nand_read_page(struct mtd_info *mtd, struct nand_chip *chip,
|
|
|
|
uint8_t *buf, int oob_required, int page)
|
2008-04-23 17:51:14 +00:00
|
|
|
{
|
|
|
|
int eccsize = chip->ecc.size;
|
|
|
|
int eccbytes = chip->ecc.bytes;
|
|
|
|
uint32_t *eccpos = chip->ecc.layout->eccpos;
|
|
|
|
uint8_t *p = buf;
|
|
|
|
uint8_t *oob = chip->oob_poi;
|
|
|
|
uint8_t *ecc_pos;
|
|
|
|
int stat;
|
2012-04-25 19:06:09 +00:00
|
|
|
unsigned int max_bitflips = 0;
|
2008-04-23 17:51:14 +00:00
|
|
|
|
2008-07-04 06:40:18 +00:00
|
|
|
/*
|
|
|
|
* Errata: ALE is incorrectly wired up to the ECC controller
|
|
|
|
* on the AP7000, so it will include the address cycles in the
|
|
|
|
* ECC calculation.
|
|
|
|
*
|
|
|
|
* Workaround: Reset the parity registers before reading the
|
|
|
|
* actual data.
|
|
|
|
*/
|
|
|
|
if (cpu_is_at32ap7000()) {
|
|
|
|
struct atmel_nand_host *host = chip->priv;
|
|
|
|
ecc_writel(host->ecc, CR, ATMEL_ECC_RST);
|
|
|
|
}
|
|
|
|
|
2008-04-23 17:51:14 +00:00
|
|
|
/* read the page */
|
|
|
|
chip->read_buf(mtd, p, eccsize);
|
|
|
|
|
|
|
|
/* move to ECC position if needed */
|
|
|
|
if (eccpos[0] != 0) {
|
|
|
|
/* This only works on large pages
|
|
|
|
* because the ECC controller waits for
|
|
|
|
* NAND_CMD_RNDOUTSTART after the
|
|
|
|
* NAND_CMD_RNDOUT.
|
|
|
|
* anyway, for small pages, the eccpos[0] == 0
|
|
|
|
*/
|
|
|
|
chip->cmdfunc(mtd, NAND_CMD_RNDOUT,
|
|
|
|
mtd->writesize + eccpos[0], -1);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* the ECC controller needs to read the ECC just after the data */
|
|
|
|
ecc_pos = oob + eccpos[0];
|
|
|
|
chip->read_buf(mtd, ecc_pos, eccbytes);
|
|
|
|
|
|
|
|
/* check if there's an error */
|
|
|
|
stat = chip->ecc.correct(mtd, p, oob, NULL);
|
|
|
|
|
2012-04-25 19:06:09 +00:00
|
|
|
if (stat < 0) {
|
2008-04-23 17:51:14 +00:00
|
|
|
mtd->ecc_stats.failed++;
|
2012-04-25 19:06:09 +00:00
|
|
|
} else {
|
2008-04-23 17:51:14 +00:00
|
|
|
mtd->ecc_stats.corrected += stat;
|
2012-04-25 19:06:09 +00:00
|
|
|
max_bitflips = max_t(unsigned int, max_bitflips, stat);
|
|
|
|
}
|
2008-04-23 17:51:14 +00:00
|
|
|
|
|
|
|
/* get back to oob start (end of page) */
|
|
|
|
chip->cmdfunc(mtd, NAND_CMD_RNDOUT, mtd->writesize, -1);
|
|
|
|
|
|
|
|
/* read the oob */
|
|
|
|
chip->read_buf(mtd, oob, mtd->oobsize);
|
|
|
|
|
2012-04-25 19:06:09 +00:00
|
|
|
return max_bitflips;
|
2008-04-23 17:51:14 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* HW ECC Correction
|
|
|
|
*
|
|
|
|
* function called after a read
|
|
|
|
*
|
|
|
|
* mtd: MTD block structure
|
|
|
|
* dat: raw data read from the chip
|
|
|
|
* read_ecc: ECC from the chip (unused)
|
|
|
|
* isnull: unused
|
|
|
|
*
|
|
|
|
* Detect and correct a 1 bit error for a page
|
|
|
|
*/
|
2008-06-06 16:04:53 +00:00
|
|
|
static int atmel_nand_correct(struct mtd_info *mtd, u_char *dat,
|
2008-04-23 17:51:14 +00:00
|
|
|
u_char *read_ecc, u_char *isnull)
|
|
|
|
{
|
|
|
|
struct nand_chip *nand_chip = mtd->priv;
|
2008-06-06 16:04:53 +00:00
|
|
|
struct atmel_nand_host *host = nand_chip->priv;
|
2008-04-23 17:51:14 +00:00
|
|
|
unsigned int ecc_status;
|
|
|
|
unsigned int ecc_word, ecc_bit;
|
|
|
|
|
|
|
|
/* get the status from the Status Register */
|
|
|
|
ecc_status = ecc_readl(host->ecc, SR);
|
|
|
|
|
|
|
|
/* if there's no error */
|
2008-06-06 16:04:53 +00:00
|
|
|
if (likely(!(ecc_status & ATMEL_ECC_RECERR)))
|
2008-04-23 17:51:14 +00:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
/* get error bit offset (4 bits) */
|
2008-06-06 16:04:53 +00:00
|
|
|
ecc_bit = ecc_readl(host->ecc, PR) & ATMEL_ECC_BITADDR;
|
2008-04-23 17:51:14 +00:00
|
|
|
/* get word address (12 bits) */
|
2008-06-06 16:04:53 +00:00
|
|
|
ecc_word = ecc_readl(host->ecc, PR) & ATMEL_ECC_WORDADDR;
|
2008-04-23 17:51:14 +00:00
|
|
|
ecc_word >>= 4;
|
|
|
|
|
|
|
|
/* if there are multiple errors */
|
2008-06-06 16:04:53 +00:00
|
|
|
if (ecc_status & ATMEL_ECC_MULERR) {
|
2008-04-23 17:51:14 +00:00
|
|
|
/* check if it is a freshly erased block
|
|
|
|
* (filled with 0xff) */
|
2008-06-06 16:04:53 +00:00
|
|
|
if ((ecc_bit == ATMEL_ECC_BITADDR)
|
|
|
|
&& (ecc_word == (ATMEL_ECC_WORDADDR >> 4))) {
|
2008-04-23 17:51:14 +00:00
|
|
|
/* the block has just been erased, return OK */
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
/* it doesn't seems to be a freshly
|
|
|
|
* erased block.
|
|
|
|
* We can't correct so many errors */
|
2008-06-06 16:04:53 +00:00
|
|
|
dev_dbg(host->dev, "atmel_nand : multiple errors detected."
|
2008-04-23 17:51:14 +00:00
|
|
|
" Unable to correct.\n");
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* if there's a single bit error : we can correct it */
|
2008-06-06 16:04:53 +00:00
|
|
|
if (ecc_status & ATMEL_ECC_ECCERR) {
|
2008-04-23 17:51:14 +00:00
|
|
|
/* there's nothing much to do here.
|
|
|
|
* the bit error is on the ECC itself.
|
|
|
|
*/
|
2008-06-06 16:04:53 +00:00
|
|
|
dev_dbg(host->dev, "atmel_nand : one bit error on ECC code."
|
2008-04-23 17:51:14 +00:00
|
|
|
" Nothing to correct\n");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2008-06-06 16:04:53 +00:00
|
|
|
dev_dbg(host->dev, "atmel_nand : one bit error on data."
|
2008-04-23 17:51:14 +00:00
|
|
|
" (word offset in the page :"
|
|
|
|
" 0x%x bit offset : 0x%x)\n",
|
|
|
|
ecc_word, ecc_bit);
|
|
|
|
/* correct the error */
|
|
|
|
if (nand_chip->options & NAND_BUSWIDTH_16) {
|
|
|
|
/* 16 bits words */
|
|
|
|
((unsigned short *) dat)[ecc_word] ^= (1 << ecc_bit);
|
|
|
|
} else {
|
|
|
|
/* 8 bits words */
|
|
|
|
dat[ecc_word] ^= (1 << ecc_bit);
|
|
|
|
}
|
2008-06-06 16:04:53 +00:00
|
|
|
dev_dbg(host->dev, "atmel_nand : error corrected\n");
|
2008-04-23 17:51:14 +00:00
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2008-07-04 06:40:18 +00:00
|
|
|
* Enable HW ECC : unused on most chips
|
2008-04-23 17:51:14 +00:00
|
|
|
*/
|
2008-07-04 06:40:18 +00:00
|
|
|
static void atmel_nand_hwctl(struct mtd_info *mtd, int mode)
|
|
|
|
{
|
|
|
|
if (cpu_is_at32ap7000()) {
|
|
|
|
struct nand_chip *nand_chip = mtd->priv;
|
|
|
|
struct atmel_nand_host *host = nand_chip->priv;
|
|
|
|
ecc_writel(host->ecc, CR, ATMEL_ECC_RST);
|
|
|
|
}
|
|
|
|
}
|
2008-04-23 17:51:14 +00:00
|
|
|
|
2012-01-25 18:11:06 +00:00
|
|
|
#if defined(CONFIG_OF)
|
2012-11-19 18:23:07 +00:00
|
|
|
static int atmel_of_init_port(struct atmel_nand_host *host,
|
2012-12-21 21:19:05 +00:00
|
|
|
struct device_node *np)
|
2012-01-25 18:11:06 +00:00
|
|
|
{
|
2012-06-29 09:47:54 +00:00
|
|
|
u32 val, table_offset;
|
|
|
|
u32 offset[2];
|
2012-01-25 18:11:06 +00:00
|
|
|
int ecc_mode;
|
|
|
|
struct atmel_nand_data *board = &host->board;
|
|
|
|
enum of_gpio_flags flags;
|
|
|
|
|
|
|
|
if (of_property_read_u32(np, "atmel,nand-addr-offset", &val) == 0) {
|
|
|
|
if (val >= 32) {
|
|
|
|
dev_err(host->dev, "invalid addr-offset %u\n", val);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
board->ale = val;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (of_property_read_u32(np, "atmel,nand-cmd-offset", &val) == 0) {
|
|
|
|
if (val >= 32) {
|
|
|
|
dev_err(host->dev, "invalid cmd-offset %u\n", val);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
board->cle = val;
|
|
|
|
}
|
|
|
|
|
|
|
|
ecc_mode = of_get_nand_ecc_mode(np);
|
|
|
|
|
|
|
|
board->ecc_mode = ecc_mode < 0 ? NAND_ECC_SOFT : ecc_mode;
|
|
|
|
|
|
|
|
board->on_flash_bbt = of_get_nand_on_flash_bbt(np);
|
|
|
|
|
|
|
|
if (of_get_nand_bus_width(np) == 16)
|
|
|
|
board->bus_width_16 = 1;
|
|
|
|
|
|
|
|
board->rdy_pin = of_get_gpio_flags(np, 0, &flags);
|
|
|
|
board->rdy_pin_active_low = (flags == OF_GPIO_ACTIVE_LOW);
|
|
|
|
|
|
|
|
board->enable_pin = of_get_gpio(np, 1);
|
|
|
|
board->det_pin = of_get_gpio(np, 2);
|
|
|
|
|
2012-06-29 09:47:54 +00:00
|
|
|
host->has_pmecc = of_property_read_bool(np, "atmel,has-pmecc");
|
|
|
|
|
|
|
|
if (!(board->ecc_mode == NAND_ECC_HW) || !host->has_pmecc)
|
|
|
|
return 0; /* Not using PMECC */
|
|
|
|
|
|
|
|
/* use PMECC, get correction capability, sector size and lookup
|
|
|
|
* table offset.
|
|
|
|
*/
|
|
|
|
if (of_property_read_u32(np, "atmel,pmecc-cap", &val) != 0) {
|
|
|
|
dev_err(host->dev, "Cannot decide PMECC Capability\n");
|
|
|
|
return -EINVAL;
|
|
|
|
} else if ((val != 2) && (val != 4) && (val != 8) && (val != 12) &&
|
|
|
|
(val != 24)) {
|
|
|
|
dev_err(host->dev,
|
|
|
|
"Unsupported PMECC correction capability: %d; should be 2, 4, 8, 12 or 24\n",
|
|
|
|
val);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
host->pmecc_corr_cap = (u8)val;
|
|
|
|
|
|
|
|
if (of_property_read_u32(np, "atmel,pmecc-sector-size", &val) != 0) {
|
|
|
|
dev_err(host->dev, "Cannot decide PMECC Sector Size\n");
|
|
|
|
return -EINVAL;
|
|
|
|
} else if ((val != 512) && (val != 1024)) {
|
|
|
|
dev_err(host->dev,
|
|
|
|
"Unsupported PMECC sector size: %d; should be 512 or 1024 bytes\n",
|
|
|
|
val);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
host->pmecc_sector_size = (u16)val;
|
|
|
|
|
|
|
|
if (of_property_read_u32_array(np, "atmel,pmecc-lookup-table-offset",
|
|
|
|
offset, 2) != 0) {
|
|
|
|
dev_err(host->dev, "Cannot get PMECC lookup table offset\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
table_offset = host->pmecc_sector_size == 512 ? offset[0] : offset[1];
|
|
|
|
|
|
|
|
if (!table_offset) {
|
|
|
|
dev_err(host->dev, "Invalid PMECC lookup table offset\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
host->pmecc_lookup_table_offset = table_offset;
|
|
|
|
|
2012-01-25 18:11:06 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
#else
|
2012-11-19 18:23:07 +00:00
|
|
|
static int atmel_of_init_port(struct atmel_nand_host *host,
|
2012-12-21 21:19:05 +00:00
|
|
|
struct device_node *np)
|
2012-01-25 18:11:06 +00:00
|
|
|
{
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2012-06-25 10:07:43 +00:00
|
|
|
static int __init atmel_hw_nand_init_params(struct platform_device *pdev,
|
|
|
|
struct atmel_nand_host *host)
|
|
|
|
{
|
|
|
|
struct mtd_info *mtd = &host->mtd;
|
|
|
|
struct nand_chip *nand_chip = &host->nand_chip;
|
|
|
|
struct resource *regs;
|
|
|
|
|
|
|
|
regs = platform_get_resource(pdev, IORESOURCE_MEM, 1);
|
|
|
|
if (!regs) {
|
|
|
|
dev_err(host->dev,
|
|
|
|
"Can't get I/O resource regs, use software ECC\n");
|
|
|
|
nand_chip->ecc.mode = NAND_ECC_SOFT;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
host->ecc = ioremap(regs->start, resource_size(regs));
|
|
|
|
if (host->ecc == NULL) {
|
|
|
|
dev_err(host->dev, "ioremap failed\n");
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* ECC is calculated for the whole page (1 step) */
|
|
|
|
nand_chip->ecc.size = mtd->writesize;
|
|
|
|
|
|
|
|
/* set ECC page size and oob layout */
|
|
|
|
switch (mtd->writesize) {
|
|
|
|
case 512:
|
|
|
|
nand_chip->ecc.layout = &atmel_oobinfo_small;
|
|
|
|
ecc_writel(host->ecc, MR, ATMEL_ECC_PAGESIZE_528);
|
|
|
|
break;
|
|
|
|
case 1024:
|
|
|
|
nand_chip->ecc.layout = &atmel_oobinfo_large;
|
|
|
|
ecc_writel(host->ecc, MR, ATMEL_ECC_PAGESIZE_1056);
|
|
|
|
break;
|
|
|
|
case 2048:
|
|
|
|
nand_chip->ecc.layout = &atmel_oobinfo_large;
|
|
|
|
ecc_writel(host->ecc, MR, ATMEL_ECC_PAGESIZE_2112);
|
|
|
|
break;
|
|
|
|
case 4096:
|
|
|
|
nand_chip->ecc.layout = &atmel_oobinfo_large;
|
|
|
|
ecc_writel(host->ecc, MR, ATMEL_ECC_PAGESIZE_4224);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
/* page size not handled by HW ECC */
|
|
|
|
/* switching back to soft ECC */
|
|
|
|
nand_chip->ecc.mode = NAND_ECC_SOFT;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* set up for HW ECC */
|
|
|
|
nand_chip->ecc.calculate = atmel_nand_calculate;
|
|
|
|
nand_chip->ecc.correct = atmel_nand_correct;
|
|
|
|
nand_chip->ecc.hwctl = atmel_nand_hwctl;
|
|
|
|
nand_chip->ecc.read_page = atmel_nand_read_page;
|
|
|
|
nand_chip->ecc.bytes = 4;
|
|
|
|
nand_chip->ecc.strength = 1;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2006-10-19 16:24:35 +00:00
|
|
|
/*
|
|
|
|
* Probe for the NAND device.
|
|
|
|
*/
|
2008-06-06 16:04:53 +00:00
|
|
|
static int __init atmel_nand_probe(struct platform_device *pdev)
|
2006-10-19 16:24:35 +00:00
|
|
|
{
|
2008-06-06 16:04:53 +00:00
|
|
|
struct atmel_nand_host *host;
|
2006-10-19 16:24:35 +00:00
|
|
|
struct mtd_info *mtd;
|
|
|
|
struct nand_chip *nand_chip;
|
2008-04-23 17:51:14 +00:00
|
|
|
struct resource *mem;
|
2012-01-25 18:11:06 +00:00
|
|
|
struct mtd_part_parser_data ppdata = {};
|
2006-10-19 16:24:35 +00:00
|
|
|
int res;
|
2012-07-12 15:31:39 +00:00
|
|
|
struct pinctrl *pinctrl;
|
2006-10-19 16:24:35 +00:00
|
|
|
|
2008-06-06 16:04:54 +00:00
|
|
|
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
|
|
if (!mem) {
|
|
|
|
printk(KERN_ERR "atmel_nand: can't get I/O resource mem\n");
|
|
|
|
return -ENXIO;
|
|
|
|
}
|
|
|
|
|
2006-10-19 16:24:35 +00:00
|
|
|
/* Allocate memory for the device structure (and zero it) */
|
2008-06-06 16:04:53 +00:00
|
|
|
host = kzalloc(sizeof(struct atmel_nand_host), GFP_KERNEL);
|
2006-10-19 16:24:35 +00:00
|
|
|
if (!host) {
|
2008-06-06 16:04:53 +00:00
|
|
|
printk(KERN_ERR "atmel_nand: failed to allocate device structure.\n");
|
2006-10-19 16:24:35 +00:00
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
2011-01-18 06:36:05 +00:00
|
|
|
host->io_phys = (dma_addr_t)mem->start;
|
|
|
|
|
2011-06-09 16:13:32 +00:00
|
|
|
host->io_base = ioremap(mem->start, resource_size(mem));
|
2006-10-19 16:24:35 +00:00
|
|
|
if (host->io_base == NULL) {
|
2008-06-06 16:04:53 +00:00
|
|
|
printk(KERN_ERR "atmel_nand: ioremap failed\n");
|
2008-06-06 16:04:54 +00:00
|
|
|
res = -EIO;
|
|
|
|
goto err_nand_ioremap;
|
2006-10-19 16:24:35 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
mtd = &host->mtd;
|
|
|
|
nand_chip = &host->nand_chip;
|
2008-04-23 17:51:14 +00:00
|
|
|
host->dev = &pdev->dev;
|
2012-01-25 18:11:06 +00:00
|
|
|
if (pdev->dev.of_node) {
|
|
|
|
res = atmel_of_init_port(host, pdev->dev.of_node);
|
|
|
|
if (res)
|
2012-07-12 08:31:08 +00:00
|
|
|
goto err_ecc_ioremap;
|
2012-01-25 18:11:06 +00:00
|
|
|
} else {
|
|
|
|
memcpy(&host->board, pdev->dev.platform_data,
|
|
|
|
sizeof(struct atmel_nand_data));
|
|
|
|
}
|
2006-10-19 16:24:35 +00:00
|
|
|
|
|
|
|
nand_chip->priv = host; /* link the private data structures */
|
|
|
|
mtd->priv = nand_chip;
|
|
|
|
mtd->owner = THIS_MODULE;
|
|
|
|
|
|
|
|
/* Set address of NAND IO lines */
|
|
|
|
nand_chip->IO_ADDR_R = host->io_base;
|
|
|
|
nand_chip->IO_ADDR_W = host->io_base;
|
2008-06-06 16:04:53 +00:00
|
|
|
nand_chip->cmd_ctrl = atmel_nand_cmd_ctrl;
|
2007-05-24 11:35:58 +00:00
|
|
|
|
2012-07-12 15:31:39 +00:00
|
|
|
pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
|
|
|
|
if (IS_ERR(pinctrl)) {
|
|
|
|
dev_err(host->dev, "Failed to request pinctrl\n");
|
|
|
|
res = PTR_ERR(pinctrl);
|
|
|
|
goto err_ecc_ioremap;
|
|
|
|
}
|
|
|
|
|
2012-07-12 08:31:08 +00:00
|
|
|
if (gpio_is_valid(host->board.rdy_pin)) {
|
|
|
|
res = gpio_request(host->board.rdy_pin, "nand_rdy");
|
|
|
|
if (res < 0) {
|
|
|
|
dev_err(&pdev->dev,
|
|
|
|
"can't request rdy gpio %d\n",
|
|
|
|
host->board.rdy_pin);
|
|
|
|
goto err_ecc_ioremap;
|
|
|
|
}
|
|
|
|
|
|
|
|
res = gpio_direction_input(host->board.rdy_pin);
|
|
|
|
if (res < 0) {
|
|
|
|
dev_err(&pdev->dev,
|
|
|
|
"can't request input direction rdy gpio %d\n",
|
|
|
|
host->board.rdy_pin);
|
|
|
|
goto err_ecc_ioremap;
|
|
|
|
}
|
|
|
|
|
2008-06-06 16:04:53 +00:00
|
|
|
nand_chip->dev_ready = atmel_nand_device_ready;
|
2012-07-12 08:31:08 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
if (gpio_is_valid(host->board.enable_pin)) {
|
|
|
|
res = gpio_request(host->board.enable_pin, "nand_enable");
|
|
|
|
if (res < 0) {
|
|
|
|
dev_err(&pdev->dev,
|
|
|
|
"can't request enable gpio %d\n",
|
|
|
|
host->board.enable_pin);
|
|
|
|
goto err_ecc_ioremap;
|
|
|
|
}
|
|
|
|
|
|
|
|
res = gpio_direction_output(host->board.enable_pin, 1);
|
|
|
|
if (res < 0) {
|
|
|
|
dev_err(&pdev->dev,
|
|
|
|
"can't request output direction enable gpio %d\n",
|
|
|
|
host->board.enable_pin);
|
|
|
|
goto err_ecc_ioremap;
|
|
|
|
}
|
|
|
|
}
|
2007-05-24 11:35:58 +00:00
|
|
|
|
2012-01-25 18:11:06 +00:00
|
|
|
nand_chip->ecc.mode = host->board.ecc_mode;
|
2006-10-19 16:24:35 +00:00
|
|
|
nand_chip->chip_delay = 20; /* 20us command delay time */
|
|
|
|
|
2012-01-25 18:11:06 +00:00
|
|
|
if (host->board.bus_width_16) /* 16-bit bus width */
|
2006-12-08 11:49:42 +00:00
|
|
|
nand_chip->options |= NAND_BUSWIDTH_16;
|
2011-01-18 06:36:05 +00:00
|
|
|
|
|
|
|
nand_chip->read_buf = atmel_read_buf;
|
|
|
|
nand_chip->write_buf = atmel_write_buf;
|
2006-12-08 11:49:42 +00:00
|
|
|
|
2006-10-19 16:24:35 +00:00
|
|
|
platform_set_drvdata(pdev, host);
|
2008-06-06 16:04:53 +00:00
|
|
|
atmel_nand_enable(host);
|
2006-10-19 16:24:35 +00:00
|
|
|
|
2012-01-25 18:11:06 +00:00
|
|
|
if (gpio_is_valid(host->board.det_pin)) {
|
2012-07-12 08:31:08 +00:00
|
|
|
res = gpio_request(host->board.det_pin, "nand_det");
|
|
|
|
if (res < 0) {
|
|
|
|
dev_err(&pdev->dev,
|
|
|
|
"can't request det gpio %d\n",
|
|
|
|
host->board.det_pin);
|
|
|
|
goto err_no_card;
|
|
|
|
}
|
|
|
|
|
|
|
|
res = gpio_direction_input(host->board.det_pin);
|
|
|
|
if (res < 0) {
|
|
|
|
dev_err(&pdev->dev,
|
|
|
|
"can't request input direction det gpio %d\n",
|
|
|
|
host->board.det_pin);
|
|
|
|
goto err_no_card;
|
|
|
|
}
|
|
|
|
|
2012-01-25 18:11:06 +00:00
|
|
|
if (gpio_get_value(host->board.det_pin)) {
|
2009-05-27 15:19:39 +00:00
|
|
|
printk(KERN_INFO "No SmartMedia card inserted.\n");
|
2009-11-11 20:47:06 +00:00
|
|
|
res = -ENXIO;
|
2008-06-06 16:04:54 +00:00
|
|
|
goto err_no_card;
|
2006-10-19 16:24:35 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-01-25 18:11:06 +00:00
|
|
|
if (host->board.on_flash_bbt || on_flash_bbt) {
|
2009-05-27 15:19:39 +00:00
|
|
|
printk(KERN_INFO "atmel_nand: Use On Flash BBT\n");
|
2011-05-31 23:31:23 +00:00
|
|
|
nand_chip->bbt_options |= NAND_BBT_USE_FLASH;
|
2009-05-27 15:19:39 +00:00
|
|
|
}
|
|
|
|
|
2011-03-30 08:26:41 +00:00
|
|
|
if (!cpu_has_dma())
|
|
|
|
use_dma = 0;
|
|
|
|
|
|
|
|
if (use_dma) {
|
2011-01-18 06:36:05 +00:00
|
|
|
dma_cap_mask_t mask;
|
|
|
|
|
|
|
|
dma_cap_zero(mask);
|
|
|
|
dma_cap_set(DMA_MEMCPY, mask);
|
2011-06-29 16:41:16 +00:00
|
|
|
host->dma_chan = dma_request_channel(mask, NULL, NULL);
|
2011-01-18 06:36:05 +00:00
|
|
|
if (!host->dma_chan) {
|
|
|
|
dev_err(host->dev, "Failed to request DMA channel\n");
|
|
|
|
use_dma = 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (use_dma)
|
2011-03-30 08:26:40 +00:00
|
|
|
dev_info(host->dev, "Using %s for DMA transfers.\n",
|
|
|
|
dma_chan_name(host->dma_chan));
|
2011-01-18 06:36:05 +00:00
|
|
|
else
|
|
|
|
dev_info(host->dev, "No DMA support for NAND access.\n");
|
|
|
|
|
2008-04-23 17:51:14 +00:00
|
|
|
/* first scan to find the device and get the page size */
|
2010-02-26 18:32:56 +00:00
|
|
|
if (nand_scan_ident(mtd, 1, NULL)) {
|
2008-04-23 17:51:14 +00:00
|
|
|
res = -ENXIO;
|
2008-06-06 16:04:54 +00:00
|
|
|
goto err_scan_ident;
|
2008-04-23 17:51:14 +00:00
|
|
|
}
|
|
|
|
|
2008-10-12 06:42:28 +00:00
|
|
|
if (nand_chip->ecc.mode == NAND_ECC_HW) {
|
2012-06-29 09:47:55 +00:00
|
|
|
if (host->has_pmecc)
|
|
|
|
res = atmel_pmecc_nand_init_params(pdev, host);
|
|
|
|
else
|
|
|
|
res = atmel_hw_nand_init_params(pdev, host);
|
|
|
|
|
2012-06-25 10:07:43 +00:00
|
|
|
if (res != 0)
|
|
|
|
goto err_hw_ecc;
|
2008-04-23 17:51:14 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* second phase scan */
|
|
|
|
if (nand_scan_tail(mtd)) {
|
2006-10-19 16:24:35 +00:00
|
|
|
res = -ENXIO;
|
2008-06-06 16:04:54 +00:00
|
|
|
goto err_scan_tail;
|
2006-10-19 16:24:35 +00:00
|
|
|
}
|
|
|
|
|
2008-06-06 16:04:53 +00:00
|
|
|
mtd->name = "atmel_nand";
|
2012-01-25 18:11:06 +00:00
|
|
|
ppdata.of_node = pdev->dev.of_node;
|
|
|
|
res = mtd_device_parse_register(mtd, NULL, &ppdata,
|
|
|
|
host->board.parts, host->board.num_parts);
|
2006-10-19 16:24:35 +00:00
|
|
|
if (!res)
|
|
|
|
return res;
|
|
|
|
|
2008-06-06 16:04:54 +00:00
|
|
|
err_scan_tail:
|
2012-06-29 09:47:55 +00:00
|
|
|
if (host->has_pmecc && host->nand_chip.ecc.mode == NAND_ECC_HW) {
|
|
|
|
pmecc_writel(host->ecc, CTRL, PMECC_CTRL_DISABLE);
|
|
|
|
pmecc_data_free(host);
|
|
|
|
}
|
2012-06-25 10:07:43 +00:00
|
|
|
if (host->ecc)
|
|
|
|
iounmap(host->ecc);
|
2012-06-29 09:47:55 +00:00
|
|
|
if (host->pmerrloc_base)
|
|
|
|
iounmap(host->pmerrloc_base);
|
|
|
|
if (host->pmecc_rom_base)
|
|
|
|
iounmap(host->pmecc_rom_base);
|
2012-06-25 10:07:43 +00:00
|
|
|
err_hw_ecc:
|
2008-06-06 16:04:54 +00:00
|
|
|
err_scan_ident:
|
|
|
|
err_no_card:
|
2008-06-06 16:04:53 +00:00
|
|
|
atmel_nand_disable(host);
|
2006-10-19 16:24:35 +00:00
|
|
|
platform_set_drvdata(pdev, NULL);
|
2011-01-18 06:36:05 +00:00
|
|
|
if (host->dma_chan)
|
|
|
|
dma_release_channel(host->dma_chan);
|
2012-07-12 08:31:08 +00:00
|
|
|
err_ecc_ioremap:
|
2006-10-19 16:24:35 +00:00
|
|
|
iounmap(host->io_base);
|
2008-06-06 16:04:54 +00:00
|
|
|
err_nand_ioremap:
|
2006-10-19 16:24:35 +00:00
|
|
|
kfree(host);
|
|
|
|
return res;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Remove a NAND device.
|
|
|
|
*/
|
2008-07-04 06:40:16 +00:00
|
|
|
static int __exit atmel_nand_remove(struct platform_device *pdev)
|
2006-10-19 16:24:35 +00:00
|
|
|
{
|
2008-06-06 16:04:53 +00:00
|
|
|
struct atmel_nand_host *host = platform_get_drvdata(pdev);
|
2006-10-19 16:24:35 +00:00
|
|
|
struct mtd_info *mtd = &host->mtd;
|
|
|
|
|
|
|
|
nand_release(mtd);
|
|
|
|
|
2008-06-06 16:04:53 +00:00
|
|
|
atmel_nand_disable(host);
|
2006-10-19 16:24:35 +00:00
|
|
|
|
2012-06-29 09:47:55 +00:00
|
|
|
if (host->has_pmecc && host->nand_chip.ecc.mode == NAND_ECC_HW) {
|
|
|
|
pmecc_writel(host->ecc, CTRL, PMECC_CTRL_DISABLE);
|
|
|
|
pmerrloc_writel(host->pmerrloc_base, ELDIS,
|
|
|
|
PMERRLOC_DISABLE);
|
|
|
|
pmecc_data_free(host);
|
|
|
|
}
|
|
|
|
|
2012-07-12 08:31:08 +00:00
|
|
|
if (gpio_is_valid(host->board.det_pin))
|
|
|
|
gpio_free(host->board.det_pin);
|
|
|
|
|
|
|
|
if (gpio_is_valid(host->board.enable_pin))
|
|
|
|
gpio_free(host->board.enable_pin);
|
|
|
|
|
|
|
|
if (gpio_is_valid(host->board.rdy_pin))
|
|
|
|
gpio_free(host->board.rdy_pin);
|
|
|
|
|
2008-06-06 16:04:54 +00:00
|
|
|
if (host->ecc)
|
|
|
|
iounmap(host->ecc);
|
2012-06-29 09:47:55 +00:00
|
|
|
if (host->pmecc_rom_base)
|
|
|
|
iounmap(host->pmecc_rom_base);
|
|
|
|
if (host->pmerrloc_base)
|
|
|
|
iounmap(host->pmerrloc_base);
|
2011-01-18 06:36:05 +00:00
|
|
|
|
|
|
|
if (host->dma_chan)
|
|
|
|
dma_release_channel(host->dma_chan);
|
|
|
|
|
2006-10-19 16:24:35 +00:00
|
|
|
iounmap(host->io_base);
|
|
|
|
kfree(host);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2012-01-25 18:11:06 +00:00
|
|
|
#if defined(CONFIG_OF)
|
|
|
|
static const struct of_device_id atmel_nand_dt_ids[] = {
|
|
|
|
{ .compatible = "atmel,at91rm9200-nand" },
|
|
|
|
{ /* sentinel */ }
|
|
|
|
};
|
|
|
|
|
|
|
|
MODULE_DEVICE_TABLE(of, atmel_nand_dt_ids);
|
|
|
|
#endif
|
|
|
|
|
2008-06-06 16:04:53 +00:00
|
|
|
static struct platform_driver atmel_nand_driver = {
|
2008-07-04 06:40:16 +00:00
|
|
|
.remove = __exit_p(atmel_nand_remove),
|
2006-10-19 16:24:35 +00:00
|
|
|
.driver = {
|
2008-06-06 16:04:53 +00:00
|
|
|
.name = "atmel_nand",
|
2006-10-19 16:24:35 +00:00
|
|
|
.owner = THIS_MODULE,
|
2012-01-25 18:11:06 +00:00
|
|
|
.of_match_table = of_match_ptr(atmel_nand_dt_ids),
|
2006-10-19 16:24:35 +00:00
|
|
|
},
|
|
|
|
};
|
|
|
|
|
2008-06-06 16:04:53 +00:00
|
|
|
static int __init atmel_nand_init(void)
|
2006-10-19 16:24:35 +00:00
|
|
|
{
|
2008-07-04 06:40:16 +00:00
|
|
|
return platform_driver_probe(&atmel_nand_driver, atmel_nand_probe);
|
2006-10-19 16:24:35 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2008-06-06 16:04:53 +00:00
|
|
|
static void __exit atmel_nand_exit(void)
|
2006-10-19 16:24:35 +00:00
|
|
|
{
|
2008-06-06 16:04:53 +00:00
|
|
|
platform_driver_unregister(&atmel_nand_driver);
|
2006-10-19 16:24:35 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2008-06-06 16:04:53 +00:00
|
|
|
module_init(atmel_nand_init);
|
|
|
|
module_exit(atmel_nand_exit);
|
2006-10-19 16:24:35 +00:00
|
|
|
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_AUTHOR("Rick Bronson");
|
2008-06-06 16:04:52 +00:00
|
|
|
MODULE_DESCRIPTION("NAND/SmartMedia driver for AT91 / AVR32");
|
2008-06-06 16:04:53 +00:00
|
|
|
MODULE_ALIAS("platform:atmel_nand");
|