2011-12-18 22:26:39 +00:00
|
|
|
/*
|
|
|
|
* Freescale i.MX28 NAND flash driver
|
|
|
|
*
|
|
|
|
* Copyright (C) 2011 Wolfram Sang <w.sang@pengutronix.de>
|
|
|
|
*
|
|
|
|
* Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
|
|
|
|
* on behalf of DENX Software Engineering GmbH
|
|
|
|
*
|
|
|
|
* Based on code from LTIB:
|
|
|
|
* Freescale GPMI NFC NAND Flash Driver
|
|
|
|
*
|
|
|
|
* Copyright (C) 2010 Freescale Semiconductor, Inc.
|
|
|
|
* Copyright (C) 2008 Embedded Alley Solutions, Inc.
|
|
|
|
*
|
|
|
|
* 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.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/mtd/mtd.h>
|
|
|
|
#include <linux/mtd/nand.h>
|
|
|
|
#include <linux/types.h>
|
2013-04-17 14:05:18 +00:00
|
|
|
#include <linux/clk.h>
|
|
|
|
#include <linux/err.h>
|
2013-07-22 10:18:58 +00:00
|
|
|
#include <of_mtd.h>
|
2011-12-18 22:26:39 +00:00
|
|
|
#include <common.h>
|
|
|
|
#include <malloc.h>
|
|
|
|
#include <errno.h>
|
|
|
|
#include <driver.h>
|
|
|
|
#include <init.h>
|
2013-07-09 14:47:50 +00:00
|
|
|
#include <io.h>
|
2013-07-09 12:20:00 +00:00
|
|
|
#include <dma/apbh-dma.h>
|
2013-07-09 11:01:00 +00:00
|
|
|
#include <stmp-device.h>
|
2011-12-18 22:26:39 +00:00
|
|
|
#include <asm/mmu.h>
|
2014-03-10 11:39:52 +00:00
|
|
|
#include <mach/generic.h>
|
2011-12-18 22:26:39 +00:00
|
|
|
|
|
|
|
#define MX28_BLOCK_SFTRST (1 << 31)
|
|
|
|
#define MX28_BLOCK_CLKGATE (1 << 30)
|
|
|
|
|
|
|
|
#define GPMI_CTRL0 0x00000000
|
|
|
|
#define GPMI_CTRL0_RUN (1 << 29)
|
|
|
|
#define GPMI_CTRL0_DEV_IRQ_EN (1 << 28)
|
|
|
|
/* Disable for now since we don't need it and it is different on MX23.
|
|
|
|
#define GPMI_CTRL0_LOCK_CS (1 << 27)
|
|
|
|
*/
|
|
|
|
#define GPMI_CTRL0_UDMA (1 << 26)
|
|
|
|
#define GPMI_CTRL0_COMMAND_MODE_MASK (0x3 << 24)
|
|
|
|
#define GPMI_CTRL0_COMMAND_MODE_OFFSET 24
|
|
|
|
#define GPMI_CTRL0_COMMAND_MODE_WRITE (0x0 << 24)
|
|
|
|
#define GPMI_CTRL0_COMMAND_MODE_READ (0x1 << 24)
|
|
|
|
#define GPMI_CTRL0_COMMAND_MODE_READ_AND_COMPARE (0x2 << 24)
|
|
|
|
#define GPMI_CTRL0_COMMAND_MODE_WAIT_FOR_READY (0x3 << 24)
|
|
|
|
#define GPMI_CTRL0_WORD_LENGTH (1 << 23)
|
|
|
|
/* Careful: Is 0x3 on MX23
|
|
|
|
#define GPMI_CTRL0_CS_MASK (0x7 << 20)
|
|
|
|
*/
|
|
|
|
#define GPMI_CTRL0_CS_OFFSET 20
|
|
|
|
#define GPMI_CTRL0_ADDRESS_MASK (0x7 << 17)
|
|
|
|
#define GPMI_CTRL0_ADDRESS_OFFSET 17
|
|
|
|
#define GPMI_CTRL0_ADDRESS_NAND_DATA (0x0 << 17)
|
|
|
|
#define GPMI_CTRL0_ADDRESS_NAND_CLE (0x1 << 17)
|
|
|
|
#define GPMI_CTRL0_ADDRESS_NAND_ALE (0x2 << 17)
|
|
|
|
#define GPMI_CTRL0_ADDRESS_INCREMENT (1 << 16)
|
|
|
|
#define GPMI_CTRL0_XFER_COUNT_MASK 0xffff
|
|
|
|
#define GPMI_CTRL0_XFER_COUNT_OFFSET 0
|
|
|
|
|
|
|
|
#define GPMI_CTRL1 0x00000060
|
|
|
|
#define GPMI_CTRL1_DECOUPLE_CS (1 << 24)
|
|
|
|
#define GPMI_CTRL1_WRN_DLY_SEL_MASK (0x3 << 22)
|
|
|
|
#define GPMI_CTRL1_WRN_DLY_SEL_OFFSET 22
|
|
|
|
#define GPMI_CTRL1_TIMEOUT_IRQ_EN (1 << 20)
|
|
|
|
#define GPMI_CTRL1_GANGED_RDYBUSY (1 << 19)
|
|
|
|
#define GPMI_CTRL1_BCH_MODE (1 << 18)
|
|
|
|
#define GPMI_CTRL1_DLL_ENABLE (1 << 17)
|
|
|
|
#define GPMI_CTRL1_HALF_PERIOD (1 << 16)
|
|
|
|
#define GPMI_CTRL1_RDN_DELAY_MASK (0xf << 12)
|
|
|
|
#define GPMI_CTRL1_RDN_DELAY_OFFSET 12
|
|
|
|
#define GPMI_CTRL1_DMA2ECC_MODE (1 << 11)
|
|
|
|
#define GPMI_CTRL1_DEV_IRQ (1 << 10)
|
|
|
|
#define GPMI_CTRL1_TIMEOUT_IRQ (1 << 9)
|
|
|
|
#define GPMI_CTRL1_BURST_EN (1 << 8)
|
|
|
|
#define GPMI_CTRL1_ABORT_WAIT_REQUEST (1 << 7)
|
|
|
|
#define GPMI_CTRL1_ABORT_WAIT_FOR_READY_CHANNEL_MASK (0x7 << 4)
|
|
|
|
#define GPMI_CTRL1_ABORT_WAIT_FOR_READY_CHANNEL_OFFSET 4
|
|
|
|
#define GPMI_CTRL1_DEV_RESET (1 << 3)
|
|
|
|
#define GPMI_CTRL1_ATA_IRQRDY_POLARITY (1 << 2)
|
|
|
|
#define GPMI_CTRL1_CAMERA_MODE (1 << 1)
|
|
|
|
#define GPMI_CTRL1_GPMI_MODE (1 << 0)
|
|
|
|
|
|
|
|
#define GPMI_ECCCTRL_HANDLE_MASK (0xffff << 16)
|
|
|
|
#define GPMI_ECCCTRL_HANDLE_OFFSET 16
|
|
|
|
#define GPMI_ECCCTRL_ECC_CMD_MASK (0x3 << 13)
|
|
|
|
#define GPMI_ECCCTRL_ECC_CMD_OFFSET 13
|
|
|
|
#define GPMI_ECCCTRL_ECC_CMD_DECODE (0x0 << 13)
|
|
|
|
#define GPMI_ECCCTRL_ECC_CMD_ENCODE (0x1 << 13)
|
|
|
|
#define GPMI_ECCCTRL_ENABLE_ECC (1 << 12)
|
|
|
|
#define GPMI_ECCCTRL_BUFFER_MASK_MASK 0x1ff
|
|
|
|
#define GPMI_ECCCTRL_BUFFER_MASK_OFFSET 0
|
|
|
|
#define GPMI_ECCCTRL_BUFFER_MASK_BCH_AUXONLY 0x100
|
|
|
|
#define GPMI_ECCCTRL_BUFFER_MASK_BCH_PAGE 0x1ff
|
|
|
|
|
|
|
|
#define GPMI_STAT 0x000000b0
|
|
|
|
#define GPMI_STAT_READY_BUSY_OFFSET 24
|
|
|
|
|
|
|
|
#define GPMI_DEBUG 0x000000c0
|
|
|
|
#define GPMI_DEBUG_READY0_OFFSET 28
|
|
|
|
|
|
|
|
#define GPMI_VERSION 0x000000d0
|
|
|
|
#define GPMI_VERSION_MINOR_OFFSET 16
|
|
|
|
#define GPMI_VERSION_TYPE_MX23 0x0300
|
|
|
|
|
|
|
|
#define BCH_CTRL 0x00000000
|
|
|
|
#define BCH_CTRL_COMPLETE_IRQ (1 << 0)
|
|
|
|
#define BCH_CTRL_COMPLETE_IRQ_EN (1 << 8)
|
|
|
|
|
|
|
|
#define BCH_LAYOUTSELECT 0x00000070
|
|
|
|
|
|
|
|
#define BCH_FLASH0LAYOUT0 0x00000080
|
|
|
|
#define BCH_FLASHLAYOUT0_NBLOCKS_MASK (0xff << 24)
|
|
|
|
#define BCH_FLASHLAYOUT0_NBLOCKS_OFFSET 24
|
|
|
|
#define BCH_FLASHLAYOUT0_META_SIZE_MASK (0xff << 16)
|
|
|
|
#define BCH_FLASHLAYOUT0_META_SIZE_OFFSET 16
|
|
|
|
#define BCH_FLASHLAYOUT0_ECC0_MASK (0xf << 12)
|
|
|
|
#define BCH_FLASHLAYOUT0_ECC0_OFFSET 12
|
2013-07-22 10:18:58 +00:00
|
|
|
#define IMX6_BCH_FLASHLAYOUT0_ECC0_OFFSET 11
|
2011-12-18 22:26:39 +00:00
|
|
|
|
|
|
|
#define BCH_FLASH0LAYOUT1 0x00000090
|
|
|
|
#define BCH_FLASHLAYOUT1_PAGE_SIZE_MASK (0xffff << 16)
|
|
|
|
#define BCH_FLASHLAYOUT1_PAGE_SIZE_OFFSET 16
|
|
|
|
#define BCH_FLASHLAYOUT1_ECCN_MASK (0xf << 12)
|
|
|
|
#define BCH_FLASHLAYOUT1_ECCN_OFFSET 12
|
2013-07-22 10:18:58 +00:00
|
|
|
#define IMX6_BCH_FLASHLAYOUT1_ECCN_OFFSET 11
|
2011-12-18 22:26:39 +00:00
|
|
|
|
|
|
|
#define MXS_NAND_DMA_DESCRIPTOR_COUNT 4
|
|
|
|
|
|
|
|
#define MXS_NAND_CHUNK_DATA_CHUNK_SIZE 512
|
|
|
|
#define MXS_NAND_METADATA_SIZE 10
|
|
|
|
|
|
|
|
#define MXS_NAND_COMMAND_BUFFER_SIZE 32
|
|
|
|
|
|
|
|
#define MXS_NAND_BCH_TIMEOUT 10000
|
|
|
|
|
2013-07-22 10:18:58 +00:00
|
|
|
enum gpmi_type {
|
|
|
|
GPMI_MXS,
|
|
|
|
GPMI_IMX6,
|
|
|
|
};
|
|
|
|
|
2011-12-18 22:26:39 +00:00
|
|
|
struct mxs_nand_info {
|
|
|
|
struct nand_chip nand_chip;
|
|
|
|
void __iomem *io_base;
|
2013-07-09 15:03:04 +00:00
|
|
|
void __iomem *bch_base;
|
2013-04-17 14:05:18 +00:00
|
|
|
struct clk *clk;
|
2011-12-18 22:26:39 +00:00
|
|
|
struct mtd_info mtd;
|
2013-07-22 10:18:58 +00:00
|
|
|
enum gpmi_type type;
|
|
|
|
int dma_channel_base;
|
2011-12-18 22:26:39 +00:00
|
|
|
u32 version;
|
|
|
|
|
|
|
|
int cur_chip;
|
|
|
|
|
|
|
|
uint32_t cmd_queue_len;
|
|
|
|
|
|
|
|
uint8_t *cmd_buf;
|
|
|
|
uint8_t *data_buf;
|
|
|
|
uint8_t *oob_buf;
|
|
|
|
|
|
|
|
uint8_t marking_block_bad;
|
|
|
|
uint8_t raw_oob_mode;
|
|
|
|
|
|
|
|
/* Functions with altered behaviour */
|
|
|
|
int (*hooked_read_oob)(struct mtd_info *mtd,
|
|
|
|
loff_t from, struct mtd_oob_ops *ops);
|
|
|
|
int (*hooked_write_oob)(struct mtd_info *mtd,
|
|
|
|
loff_t to, struct mtd_oob_ops *ops);
|
|
|
|
int (*hooked_block_markbad)(struct mtd_info *mtd,
|
|
|
|
loff_t ofs);
|
|
|
|
|
|
|
|
/* DMA descriptors */
|
|
|
|
struct mxs_dma_desc **desc;
|
|
|
|
uint32_t desc_index;
|
|
|
|
};
|
|
|
|
|
|
|
|
struct nand_ecclayout fake_ecc_layout;
|
|
|
|
|
2013-07-22 10:18:58 +00:00
|
|
|
static inline int mxs_nand_is_imx6(struct mxs_nand_info *info)
|
|
|
|
{
|
|
|
|
return info->type == GPMI_IMX6;
|
|
|
|
}
|
|
|
|
|
2011-12-18 22:26:39 +00:00
|
|
|
static struct mxs_dma_desc *mxs_nand_get_dma_desc(struct mxs_nand_info *info)
|
|
|
|
{
|
|
|
|
struct mxs_dma_desc *desc;
|
|
|
|
|
|
|
|
if (info->desc_index >= MXS_NAND_DMA_DESCRIPTOR_COUNT) {
|
|
|
|
printf("MXS NAND: Too many DMA descriptors requested\n");
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
desc = info->desc[info->desc_index];
|
|
|
|
info->desc_index++;
|
|
|
|
|
|
|
|
return desc;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void mxs_nand_return_dma_descs(struct mxs_nand_info *info)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
struct mxs_dma_desc *desc;
|
|
|
|
|
|
|
|
for (i = 0; i < info->desc_index; i++) {
|
|
|
|
desc = info->desc[i];
|
|
|
|
memset(desc, 0, sizeof(struct mxs_dma_desc));
|
|
|
|
desc->address = (dma_addr_t)desc;
|
|
|
|
}
|
|
|
|
|
|
|
|
info->desc_index = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static uint32_t mxs_nand_ecc_chunk_cnt(uint32_t page_data_size)
|
|
|
|
{
|
|
|
|
return page_data_size / MXS_NAND_CHUNK_DATA_CHUNK_SIZE;
|
|
|
|
}
|
|
|
|
|
|
|
|
static uint32_t mxs_nand_ecc_size_in_bits(uint32_t ecc_strength)
|
|
|
|
{
|
|
|
|
return ecc_strength * 13;
|
|
|
|
}
|
|
|
|
|
|
|
|
static uint32_t mxs_nand_aux_status_offset(void)
|
|
|
|
{
|
|
|
|
return (MXS_NAND_METADATA_SIZE + 0x3) & ~0x3;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline uint32_t mxs_nand_get_ecc_strength(uint32_t page_data_size,
|
|
|
|
uint32_t page_oob_size)
|
|
|
|
{
|
2014-03-10 11:39:53 +00:00
|
|
|
int ecc_chunk_count = mxs_nand_ecc_chunk_cnt(page_data_size);
|
|
|
|
int ecc_strength = 0;
|
|
|
|
int gf_len = 13; /* length of Galois Field for non-DDR nand */
|
|
|
|
|
|
|
|
ecc_strength = ((page_oob_size - MXS_NAND_METADATA_SIZE) * 8)
|
|
|
|
/ (gf_len * ecc_chunk_count);
|
|
|
|
|
|
|
|
/* We need the minor even number. */
|
|
|
|
return rounddown(ecc_strength, 2);
|
2011-12-18 22:26:39 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static inline uint32_t mxs_nand_get_mark_offset(uint32_t page_data_size,
|
|
|
|
uint32_t ecc_strength)
|
|
|
|
{
|
|
|
|
uint32_t chunk_data_size_in_bits;
|
|
|
|
uint32_t chunk_ecc_size_in_bits;
|
|
|
|
uint32_t chunk_total_size_in_bits;
|
|
|
|
uint32_t block_mark_chunk_number;
|
|
|
|
uint32_t block_mark_chunk_bit_offset;
|
|
|
|
uint32_t block_mark_bit_offset;
|
|
|
|
|
|
|
|
chunk_data_size_in_bits = MXS_NAND_CHUNK_DATA_CHUNK_SIZE * 8;
|
|
|
|
chunk_ecc_size_in_bits = mxs_nand_ecc_size_in_bits(ecc_strength);
|
|
|
|
|
|
|
|
chunk_total_size_in_bits =
|
|
|
|
chunk_data_size_in_bits + chunk_ecc_size_in_bits;
|
|
|
|
|
|
|
|
/* Compute the bit offset of the block mark within the physical page. */
|
|
|
|
block_mark_bit_offset = page_data_size * 8;
|
|
|
|
|
|
|
|
/* Subtract the metadata bits. */
|
|
|
|
block_mark_bit_offset -= MXS_NAND_METADATA_SIZE * 8;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Compute the chunk number (starting at zero) in which the block mark
|
|
|
|
* appears.
|
|
|
|
*/
|
|
|
|
block_mark_chunk_number =
|
|
|
|
block_mark_bit_offset / chunk_total_size_in_bits;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Compute the bit offset of the block mark within its chunk, and
|
|
|
|
* validate it.
|
|
|
|
*/
|
|
|
|
block_mark_chunk_bit_offset = block_mark_bit_offset -
|
|
|
|
(block_mark_chunk_number * chunk_total_size_in_bits);
|
|
|
|
|
|
|
|
if (block_mark_chunk_bit_offset > chunk_data_size_in_bits)
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Now that we know the chunk number in which the block mark appears,
|
|
|
|
* we can subtract all the ECC bits that appear before it.
|
|
|
|
*/
|
|
|
|
block_mark_bit_offset -=
|
|
|
|
block_mark_chunk_number * chunk_ecc_size_in_bits;
|
|
|
|
|
|
|
|
return block_mark_bit_offset;
|
|
|
|
}
|
|
|
|
|
|
|
|
static uint32_t mxs_nand_mark_byte_offset(struct mtd_info *mtd)
|
|
|
|
{
|
|
|
|
uint32_t ecc_strength;
|
|
|
|
ecc_strength = mxs_nand_get_ecc_strength(mtd->writesize, mtd->oobsize);
|
|
|
|
return mxs_nand_get_mark_offset(mtd->writesize, ecc_strength) >> 3;
|
|
|
|
}
|
|
|
|
|
|
|
|
static uint32_t mxs_nand_mark_bit_offset(struct mtd_info *mtd)
|
|
|
|
{
|
|
|
|
uint32_t ecc_strength;
|
|
|
|
ecc_strength = mxs_nand_get_ecc_strength(mtd->writesize, mtd->oobsize);
|
|
|
|
return mxs_nand_get_mark_offset(mtd->writesize, ecc_strength) & 0x7;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Wait for BCH complete IRQ and clear the IRQ
|
|
|
|
*/
|
2013-07-09 15:03:04 +00:00
|
|
|
static int mxs_nand_wait_for_bch_complete(struct mxs_nand_info *nand_info)
|
2011-12-18 22:26:39 +00:00
|
|
|
{
|
2013-07-09 15:03:04 +00:00
|
|
|
void __iomem *bch_regs = nand_info->bch_base;
|
2011-12-18 22:26:39 +00:00
|
|
|
int timeout = MXS_NAND_BCH_TIMEOUT;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
while (--timeout) {
|
|
|
|
if (readl(bch_regs + BCH_CTRL) & BCH_CTRL_COMPLETE_IRQ)
|
|
|
|
break;
|
|
|
|
udelay(1);
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = (timeout == 0) ? -ETIMEDOUT : 0;
|
|
|
|
|
2013-07-09 11:01:00 +00:00
|
|
|
writel(BCH_CTRL_COMPLETE_IRQ, bch_regs + BCH_CTRL + STMP_OFFSET_REG_CLR);
|
2011-12-18 22:26:39 +00:00
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This is the function that we install in the cmd_ctrl function pointer of the
|
|
|
|
* owning struct nand_chip. The only functions in the reference implementation
|
|
|
|
* that use these functions pointers are cmdfunc and select_chip.
|
|
|
|
*
|
|
|
|
* In this driver, we implement our own select_chip, so this function will only
|
|
|
|
* be called by the reference implementation's cmdfunc. For this reason, we can
|
|
|
|
* ignore the chip enable bit and concentrate only on sending bytes to the NAND
|
|
|
|
* Flash.
|
|
|
|
*/
|
|
|
|
static void mxs_nand_cmd_ctrl(struct mtd_info *mtd, int data, unsigned int ctrl)
|
|
|
|
{
|
|
|
|
struct nand_chip *nand = mtd->priv;
|
|
|
|
struct mxs_nand_info *nand_info = nand->priv;
|
|
|
|
struct mxs_dma_desc *d;
|
2013-07-22 10:18:58 +00:00
|
|
|
uint32_t channel = nand_info->dma_channel_base + nand_info->cur_chip;
|
2011-12-18 22:26:39 +00:00
|
|
|
int ret;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If this condition is true, something is _VERY_ wrong in MTD
|
|
|
|
* subsystem!
|
|
|
|
*/
|
|
|
|
if (nand_info->cmd_queue_len == MXS_NAND_COMMAND_BUFFER_SIZE) {
|
|
|
|
printf("MXS NAND: Command queue too long\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Every operation begins with a command byte and a series of zero or
|
|
|
|
* more address bytes. These are distinguished by either the Address
|
|
|
|
* Latch Enable (ALE) or Command Latch Enable (CLE) signals being
|
|
|
|
* asserted. When MTD is ready to execute the command, it will
|
|
|
|
* deasert both latch enables.
|
|
|
|
*
|
|
|
|
* Rather than run a separate DMA operation for every single byte, we
|
|
|
|
* queue them up and run a single DMA operation for the entire series
|
|
|
|
* of command and data bytes.
|
|
|
|
*/
|
|
|
|
if (ctrl & (NAND_ALE | NAND_CLE)) {
|
|
|
|
if (data != NAND_CMD_NONE)
|
|
|
|
nand_info->cmd_buf[nand_info->cmd_queue_len++] = data;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If control arrives here, MTD has deasserted both the ALE and CLE,
|
|
|
|
* which means it's ready to run an operation. Check if we have any
|
|
|
|
* bytes to send.
|
|
|
|
*/
|
|
|
|
if (nand_info->cmd_queue_len == 0)
|
|
|
|
return;
|
|
|
|
|
|
|
|
/* Compile the DMA descriptor -- a descriptor that sends command. */
|
|
|
|
d = mxs_nand_get_dma_desc(nand_info);
|
|
|
|
d->cmd.data =
|
|
|
|
MXS_DMA_DESC_COMMAND_DMA_READ | MXS_DMA_DESC_IRQ |
|
|
|
|
MXS_DMA_DESC_CHAIN | MXS_DMA_DESC_DEC_SEM |
|
|
|
|
MXS_DMA_DESC_WAIT4END | (3 << MXS_DMA_DESC_PIO_WORDS_OFFSET) |
|
|
|
|
(nand_info->cmd_queue_len << MXS_DMA_DESC_BYTES_OFFSET);
|
|
|
|
|
|
|
|
d->cmd.address = (dma_addr_t)nand_info->cmd_buf;
|
|
|
|
|
|
|
|
d->cmd.pio_words[0] =
|
|
|
|
GPMI_CTRL0_COMMAND_MODE_WRITE |
|
|
|
|
GPMI_CTRL0_WORD_LENGTH |
|
|
|
|
(nand_info->cur_chip << GPMI_CTRL0_CS_OFFSET) |
|
|
|
|
GPMI_CTRL0_ADDRESS_NAND_CLE |
|
|
|
|
GPMI_CTRL0_ADDRESS_INCREMENT |
|
|
|
|
nand_info->cmd_queue_len;
|
|
|
|
|
|
|
|
mxs_dma_desc_append(channel, d);
|
|
|
|
|
|
|
|
/* Execute the DMA chain. */
|
|
|
|
ret = mxs_dma_go(channel);
|
|
|
|
if (ret)
|
|
|
|
printf("MXS NAND: Error sending command\n");
|
|
|
|
|
|
|
|
mxs_nand_return_dma_descs(nand_info);
|
|
|
|
|
|
|
|
/* Reset the command queue. */
|
|
|
|
nand_info->cmd_queue_len = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Test if the NAND flash is ready.
|
|
|
|
*/
|
|
|
|
static int mxs_nand_device_ready(struct mtd_info *mtd)
|
|
|
|
{
|
|
|
|
struct nand_chip *chip = mtd->priv;
|
|
|
|
struct mxs_nand_info *nand_info = chip->priv;
|
2013-07-09 14:44:17 +00:00
|
|
|
void __iomem *gpmi_regs = nand_info->io_base;
|
2011-12-18 22:26:39 +00:00
|
|
|
uint32_t tmp;
|
|
|
|
|
|
|
|
if (nand_info->version > GPMI_VERSION_TYPE_MX23) {
|
|
|
|
tmp = readl(gpmi_regs + GPMI_STAT);
|
2014-03-10 11:39:52 +00:00
|
|
|
/* i.MX6 has only one R/B actual pin, so if there are several
|
|
|
|
R/B signals they must be all connected to this pin */
|
|
|
|
if (cpu_is_mx6())
|
|
|
|
tmp >>= GPMI_STAT_READY_BUSY_OFFSET;
|
|
|
|
else
|
|
|
|
tmp >>= (GPMI_STAT_READY_BUSY_OFFSET +
|
|
|
|
nand_info->cur_chip);
|
2011-12-18 22:26:39 +00:00
|
|
|
} else {
|
|
|
|
tmp = readl(gpmi_regs + GPMI_DEBUG);
|
|
|
|
tmp >>= (GPMI_DEBUG_READY0_OFFSET + nand_info->cur_chip);
|
|
|
|
}
|
|
|
|
return tmp & 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Select the NAND chip.
|
|
|
|
*/
|
|
|
|
static void mxs_nand_select_chip(struct mtd_info *mtd, int chip)
|
|
|
|
{
|
|
|
|
struct nand_chip *nand = mtd->priv;
|
|
|
|
struct mxs_nand_info *nand_info = nand->priv;
|
|
|
|
|
|
|
|
nand_info->cur_chip = chip;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Handle block mark swapping.
|
|
|
|
*
|
|
|
|
* Note that, when this function is called, it doesn't know whether it's
|
|
|
|
* swapping the block mark, or swapping it *back* -- but it doesn't matter
|
|
|
|
* because the the operation is the same.
|
|
|
|
*/
|
|
|
|
static void mxs_nand_swap_block_mark(struct mtd_info *mtd,
|
|
|
|
uint8_t *data_buf, uint8_t *oob_buf)
|
|
|
|
{
|
|
|
|
struct nand_chip *chip = mtd->priv;
|
|
|
|
struct mxs_nand_info *nand_info = chip->priv;
|
|
|
|
|
|
|
|
uint32_t bit_offset;
|
|
|
|
uint32_t buf_offset;
|
|
|
|
|
|
|
|
uint32_t src;
|
|
|
|
uint32_t dst;
|
|
|
|
|
|
|
|
/* Don't do swapping on MX23 */
|
|
|
|
if (nand_info->version == GPMI_VERSION_TYPE_MX23)
|
|
|
|
return;
|
|
|
|
|
|
|
|
bit_offset = mxs_nand_mark_bit_offset(mtd);
|
|
|
|
buf_offset = mxs_nand_mark_byte_offset(mtd);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Get the byte from the data area that overlays the block mark. Since
|
|
|
|
* the ECC engine applies its own view to the bits in the page, the
|
|
|
|
* physical block mark won't (in general) appear on a byte boundary in
|
|
|
|
* the data.
|
|
|
|
*/
|
|
|
|
src = data_buf[buf_offset] >> bit_offset;
|
|
|
|
src |= data_buf[buf_offset + 1] << (8 - bit_offset);
|
|
|
|
|
|
|
|
dst = oob_buf[0];
|
|
|
|
|
|
|
|
oob_buf[0] = src;
|
|
|
|
|
|
|
|
data_buf[buf_offset] &= ~(0xff << bit_offset);
|
|
|
|
data_buf[buf_offset + 1] &= 0xff << bit_offset;
|
|
|
|
|
|
|
|
data_buf[buf_offset] |= dst << bit_offset;
|
|
|
|
data_buf[buf_offset + 1] |= dst >> (8 - bit_offset);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Read data from NAND.
|
|
|
|
*/
|
|
|
|
static void mxs_nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int length)
|
|
|
|
{
|
|
|
|
struct nand_chip *nand = mtd->priv;
|
|
|
|
struct mxs_nand_info *nand_info = nand->priv;
|
|
|
|
struct mxs_dma_desc *d;
|
2013-07-22 10:18:58 +00:00
|
|
|
uint32_t channel = nand_info->dma_channel_base + nand_info->cur_chip;
|
2011-12-18 22:26:39 +00:00
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (length > NAND_MAX_PAGESIZE) {
|
|
|
|
printf("MXS NAND: DMA buffer too big\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!buf) {
|
|
|
|
printf("MXS NAND: DMA buffer is NULL\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Compile the DMA descriptor - a descriptor that reads data. */
|
|
|
|
d = mxs_nand_get_dma_desc(nand_info);
|
|
|
|
d->cmd.data =
|
|
|
|
MXS_DMA_DESC_COMMAND_DMA_WRITE | MXS_DMA_DESC_IRQ |
|
|
|
|
MXS_DMA_DESC_DEC_SEM | MXS_DMA_DESC_WAIT4END |
|
|
|
|
(1 << MXS_DMA_DESC_PIO_WORDS_OFFSET) |
|
|
|
|
(length << MXS_DMA_DESC_BYTES_OFFSET);
|
|
|
|
|
|
|
|
d->cmd.address = (dma_addr_t)nand_info->data_buf;
|
|
|
|
|
|
|
|
d->cmd.pio_words[0] =
|
|
|
|
GPMI_CTRL0_COMMAND_MODE_READ |
|
|
|
|
GPMI_CTRL0_WORD_LENGTH |
|
|
|
|
(nand_info->cur_chip << GPMI_CTRL0_CS_OFFSET) |
|
|
|
|
GPMI_CTRL0_ADDRESS_NAND_DATA |
|
|
|
|
length;
|
|
|
|
|
|
|
|
mxs_dma_desc_append(channel, d);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* A DMA descriptor that waits for the command to end and the chip to
|
|
|
|
* become ready.
|
|
|
|
*
|
|
|
|
* I think we actually should *not* be waiting for the chip to become
|
|
|
|
* ready because, after all, we don't care. I think the original code
|
|
|
|
* did that and no one has re-thought it yet.
|
|
|
|
*/
|
|
|
|
d = mxs_nand_get_dma_desc(nand_info);
|
|
|
|
d->cmd.data =
|
|
|
|
MXS_DMA_DESC_COMMAND_NO_DMAXFER | MXS_DMA_DESC_IRQ |
|
|
|
|
MXS_DMA_DESC_NAND_WAIT_4_READY | MXS_DMA_DESC_DEC_SEM |
|
|
|
|
MXS_DMA_DESC_WAIT4END | (4 << MXS_DMA_DESC_PIO_WORDS_OFFSET);
|
|
|
|
|
|
|
|
d->cmd.address = 0;
|
|
|
|
|
|
|
|
d->cmd.pio_words[0] =
|
|
|
|
GPMI_CTRL0_COMMAND_MODE_WAIT_FOR_READY |
|
|
|
|
GPMI_CTRL0_WORD_LENGTH |
|
|
|
|
(nand_info->cur_chip << GPMI_CTRL0_CS_OFFSET) |
|
|
|
|
GPMI_CTRL0_ADDRESS_NAND_DATA;
|
|
|
|
|
|
|
|
mxs_dma_desc_append(channel, d);
|
|
|
|
|
|
|
|
/* Execute the DMA chain. */
|
|
|
|
ret = mxs_dma_go(channel);
|
|
|
|
if (ret) {
|
|
|
|
printf("MXS NAND: DMA read error\n");
|
|
|
|
goto rtn;
|
|
|
|
}
|
|
|
|
|
|
|
|
memcpy(buf, nand_info->data_buf, length);
|
|
|
|
|
|
|
|
rtn:
|
|
|
|
mxs_nand_return_dma_descs(nand_info);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Write data to NAND.
|
|
|
|
*/
|
|
|
|
static void mxs_nand_write_buf(struct mtd_info *mtd, const uint8_t *buf,
|
|
|
|
int length)
|
|
|
|
{
|
|
|
|
struct nand_chip *nand = mtd->priv;
|
|
|
|
struct mxs_nand_info *nand_info = nand->priv;
|
|
|
|
struct mxs_dma_desc *d;
|
2013-07-22 10:18:58 +00:00
|
|
|
uint32_t channel = nand_info->dma_channel_base + nand_info->cur_chip;
|
2011-12-18 22:26:39 +00:00
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (length > NAND_MAX_PAGESIZE) {
|
|
|
|
printf("MXS NAND: DMA buffer too big\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!buf) {
|
|
|
|
printf("MXS NAND: DMA buffer is NULL\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
memcpy(nand_info->data_buf, buf, length);
|
|
|
|
|
|
|
|
/* Compile the DMA descriptor - a descriptor that writes data. */
|
|
|
|
d = mxs_nand_get_dma_desc(nand_info);
|
|
|
|
d->cmd.data =
|
|
|
|
MXS_DMA_DESC_COMMAND_DMA_READ | MXS_DMA_DESC_IRQ |
|
|
|
|
MXS_DMA_DESC_DEC_SEM | MXS_DMA_DESC_WAIT4END |
|
|
|
|
(4 << MXS_DMA_DESC_PIO_WORDS_OFFSET) |
|
|
|
|
(length << MXS_DMA_DESC_BYTES_OFFSET);
|
|
|
|
|
|
|
|
d->cmd.address = (dma_addr_t)nand_info->data_buf;
|
|
|
|
|
|
|
|
d->cmd.pio_words[0] =
|
|
|
|
GPMI_CTRL0_COMMAND_MODE_WRITE |
|
|
|
|
GPMI_CTRL0_WORD_LENGTH |
|
|
|
|
(nand_info->cur_chip << GPMI_CTRL0_CS_OFFSET) |
|
|
|
|
GPMI_CTRL0_ADDRESS_NAND_DATA |
|
|
|
|
length;
|
|
|
|
|
|
|
|
mxs_dma_desc_append(channel, d);
|
|
|
|
|
|
|
|
/* Execute the DMA chain. */
|
|
|
|
ret = mxs_dma_go(channel);
|
|
|
|
if (ret)
|
|
|
|
printf("MXS NAND: DMA write error\n");
|
|
|
|
|
|
|
|
mxs_nand_return_dma_descs(nand_info);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Read a single byte from NAND.
|
|
|
|
*/
|
|
|
|
static uint8_t mxs_nand_read_byte(struct mtd_info *mtd)
|
|
|
|
{
|
|
|
|
uint8_t buf;
|
|
|
|
mxs_nand_read_buf(mtd, &buf, 1);
|
|
|
|
return buf;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Read a page from NAND.
|
|
|
|
*/
|
|
|
|
static int mxs_nand_ecc_read_page(struct mtd_info *mtd, struct nand_chip *nand,
|
2013-07-18 13:10:50 +00:00
|
|
|
uint8_t *buf, int oob_required, int page)
|
2011-12-18 22:26:39 +00:00
|
|
|
{
|
|
|
|
struct mxs_nand_info *nand_info = nand->priv;
|
|
|
|
struct mxs_dma_desc *d;
|
2013-07-22 10:18:58 +00:00
|
|
|
uint32_t channel = nand_info->dma_channel_base + nand_info->cur_chip;
|
2011-12-18 22:26:39 +00:00
|
|
|
uint32_t corrected = 0, failed = 0;
|
|
|
|
uint8_t *status;
|
2014-04-29 08:53:15 +00:00
|
|
|
unsigned int max_bitflips = 0;
|
2011-12-18 22:26:39 +00:00
|
|
|
int i, ret;
|
|
|
|
|
|
|
|
/* Compile the DMA descriptor - wait for ready. */
|
|
|
|
d = mxs_nand_get_dma_desc(nand_info);
|
|
|
|
d->cmd.data =
|
|
|
|
MXS_DMA_DESC_COMMAND_NO_DMAXFER | MXS_DMA_DESC_CHAIN |
|
|
|
|
MXS_DMA_DESC_NAND_WAIT_4_READY | MXS_DMA_DESC_WAIT4END |
|
|
|
|
(1 << MXS_DMA_DESC_PIO_WORDS_OFFSET);
|
|
|
|
|
|
|
|
d->cmd.address = 0;
|
|
|
|
|
|
|
|
d->cmd.pio_words[0] =
|
|
|
|
GPMI_CTRL0_COMMAND_MODE_WAIT_FOR_READY |
|
|
|
|
GPMI_CTRL0_WORD_LENGTH |
|
|
|
|
(nand_info->cur_chip << GPMI_CTRL0_CS_OFFSET) |
|
|
|
|
GPMI_CTRL0_ADDRESS_NAND_DATA;
|
|
|
|
|
|
|
|
mxs_dma_desc_append(channel, d);
|
|
|
|
|
|
|
|
/* Compile the DMA descriptor - enable the BCH block and read. */
|
|
|
|
d = mxs_nand_get_dma_desc(nand_info);
|
|
|
|
d->cmd.data =
|
|
|
|
MXS_DMA_DESC_COMMAND_NO_DMAXFER | MXS_DMA_DESC_CHAIN |
|
|
|
|
MXS_DMA_DESC_WAIT4END | (6 << MXS_DMA_DESC_PIO_WORDS_OFFSET);
|
|
|
|
|
|
|
|
d->cmd.address = 0;
|
|
|
|
|
|
|
|
d->cmd.pio_words[0] =
|
|
|
|
GPMI_CTRL0_COMMAND_MODE_READ |
|
|
|
|
GPMI_CTRL0_WORD_LENGTH |
|
|
|
|
(nand_info->cur_chip << GPMI_CTRL0_CS_OFFSET) |
|
|
|
|
GPMI_CTRL0_ADDRESS_NAND_DATA |
|
|
|
|
(mtd->writesize + mtd->oobsize);
|
|
|
|
d->cmd.pio_words[1] = 0;
|
|
|
|
d->cmd.pio_words[2] =
|
|
|
|
GPMI_ECCCTRL_ENABLE_ECC |
|
|
|
|
GPMI_ECCCTRL_ECC_CMD_DECODE |
|
|
|
|
GPMI_ECCCTRL_BUFFER_MASK_BCH_PAGE;
|
|
|
|
d->cmd.pio_words[3] = mtd->writesize + mtd->oobsize;
|
|
|
|
d->cmd.pio_words[4] = (dma_addr_t)nand_info->data_buf;
|
|
|
|
d->cmd.pio_words[5] = (dma_addr_t)nand_info->oob_buf;
|
|
|
|
|
|
|
|
mxs_dma_desc_append(channel, d);
|
|
|
|
|
|
|
|
/* Compile the DMA descriptor - disable the BCH block. */
|
|
|
|
d = mxs_nand_get_dma_desc(nand_info);
|
|
|
|
d->cmd.data =
|
|
|
|
MXS_DMA_DESC_COMMAND_NO_DMAXFER | MXS_DMA_DESC_CHAIN |
|
|
|
|
MXS_DMA_DESC_NAND_WAIT_4_READY | MXS_DMA_DESC_WAIT4END |
|
|
|
|
(3 << MXS_DMA_DESC_PIO_WORDS_OFFSET);
|
|
|
|
|
|
|
|
d->cmd.address = 0;
|
|
|
|
|
|
|
|
d->cmd.pio_words[0] =
|
|
|
|
GPMI_CTRL0_COMMAND_MODE_WAIT_FOR_READY |
|
|
|
|
GPMI_CTRL0_WORD_LENGTH |
|
|
|
|
(nand_info->cur_chip << GPMI_CTRL0_CS_OFFSET) |
|
|
|
|
GPMI_CTRL0_ADDRESS_NAND_DATA |
|
|
|
|
(mtd->writesize + mtd->oobsize);
|
|
|
|
d->cmd.pio_words[1] = 0;
|
|
|
|
d->cmd.pio_words[2] = 0;
|
|
|
|
|
|
|
|
mxs_dma_desc_append(channel, d);
|
|
|
|
|
|
|
|
/* Compile the DMA descriptor - deassert the NAND lock and interrupt. */
|
|
|
|
d = mxs_nand_get_dma_desc(nand_info);
|
|
|
|
d->cmd.data =
|
|
|
|
MXS_DMA_DESC_COMMAND_NO_DMAXFER | MXS_DMA_DESC_IRQ |
|
|
|
|
MXS_DMA_DESC_DEC_SEM;
|
|
|
|
|
|
|
|
d->cmd.address = 0;
|
|
|
|
|
|
|
|
mxs_dma_desc_append(channel, d);
|
|
|
|
|
|
|
|
/* Execute the DMA chain. */
|
|
|
|
ret = mxs_dma_go(channel);
|
|
|
|
if (ret) {
|
|
|
|
printf("MXS NAND: DMA read error\n");
|
|
|
|
goto rtn;
|
|
|
|
}
|
|
|
|
|
2013-07-09 15:03:04 +00:00
|
|
|
ret = mxs_nand_wait_for_bch_complete(nand_info);
|
2011-12-18 22:26:39 +00:00
|
|
|
if (ret) {
|
|
|
|
printf("MXS NAND: BCH read timeout\n");
|
|
|
|
goto rtn;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Read DMA completed, now do the mark swapping. */
|
|
|
|
mxs_nand_swap_block_mark(mtd, nand_info->data_buf, nand_info->oob_buf);
|
|
|
|
|
|
|
|
/* Loop over status bytes, accumulating ECC status. */
|
|
|
|
status = nand_info->oob_buf + mxs_nand_aux_status_offset();
|
|
|
|
for (i = 0; i < mxs_nand_ecc_chunk_cnt(mtd->writesize); i++) {
|
|
|
|
if (status[i] == 0x00)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
if (status[i] == 0xff)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
if (status[i] == 0xfe) {
|
|
|
|
failed++;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
corrected += status[i];
|
2014-04-29 08:53:15 +00:00
|
|
|
max_bitflips = max_t(unsigned int, max_bitflips, status[i]);
|
2011-12-18 22:26:39 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Propagate ECC status to the owning MTD. */
|
|
|
|
mtd->ecc_stats.failed += failed;
|
|
|
|
mtd->ecc_stats.corrected += corrected;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* It's time to deliver the OOB bytes. See mxs_nand_ecc_read_oob() for
|
|
|
|
* details about our policy for delivering the OOB.
|
|
|
|
*
|
|
|
|
* We fill the caller's buffer with set bits, and then copy the block
|
|
|
|
* mark to the caller's buffer. Note that, if block mark swapping was
|
|
|
|
* necessary, it has already been done, so we can rely on the first
|
|
|
|
* byte of the auxiliary buffer to contain the block mark.
|
|
|
|
*/
|
|
|
|
memset(nand->oob_poi, 0xff, mtd->oobsize);
|
|
|
|
|
|
|
|
nand->oob_poi[0] = nand_info->oob_buf[0];
|
|
|
|
|
|
|
|
memcpy(buf, nand_info->data_buf, mtd->writesize);
|
|
|
|
|
2014-04-29 08:53:15 +00:00
|
|
|
ret = 0;
|
2011-12-18 22:26:39 +00:00
|
|
|
rtn:
|
|
|
|
mxs_nand_return_dma_descs(nand_info);
|
|
|
|
|
2014-04-29 08:53:15 +00:00
|
|
|
return ret ? ret : max_bitflips;
|
2011-12-18 22:26:39 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Write a page to NAND.
|
|
|
|
*/
|
2013-07-18 13:10:50 +00:00
|
|
|
static int mxs_nand_ecc_write_page(struct mtd_info *mtd,
|
|
|
|
struct nand_chip *nand, const uint8_t *buf,
|
|
|
|
int oob_required)
|
2011-12-18 22:26:39 +00:00
|
|
|
{
|
|
|
|
struct mxs_nand_info *nand_info = nand->priv;
|
|
|
|
struct mxs_dma_desc *d;
|
2013-07-22 10:18:58 +00:00
|
|
|
uint32_t channel = nand_info->dma_channel_base + nand_info->cur_chip;
|
2013-07-18 13:10:50 +00:00
|
|
|
int ret = 0;
|
2011-12-18 22:26:39 +00:00
|
|
|
|
|
|
|
memcpy(nand_info->data_buf, buf, mtd->writesize);
|
|
|
|
memcpy(nand_info->oob_buf, nand->oob_poi, mtd->oobsize);
|
|
|
|
|
|
|
|
/* Handle block mark swapping. */
|
|
|
|
mxs_nand_swap_block_mark(mtd, nand_info->data_buf, nand_info->oob_buf);
|
|
|
|
|
|
|
|
/* Compile the DMA descriptor - write data. */
|
|
|
|
d = mxs_nand_get_dma_desc(nand_info);
|
|
|
|
d->cmd.data =
|
|
|
|
MXS_DMA_DESC_COMMAND_NO_DMAXFER | MXS_DMA_DESC_IRQ |
|
|
|
|
MXS_DMA_DESC_DEC_SEM | MXS_DMA_DESC_WAIT4END |
|
|
|
|
(6 << MXS_DMA_DESC_PIO_WORDS_OFFSET);
|
|
|
|
|
|
|
|
d->cmd.address = 0;
|
|
|
|
|
|
|
|
d->cmd.pio_words[0] =
|
|
|
|
GPMI_CTRL0_COMMAND_MODE_WRITE |
|
|
|
|
GPMI_CTRL0_WORD_LENGTH |
|
|
|
|
(nand_info->cur_chip << GPMI_CTRL0_CS_OFFSET) |
|
|
|
|
GPMI_CTRL0_ADDRESS_NAND_DATA;
|
|
|
|
d->cmd.pio_words[1] = 0;
|
|
|
|
d->cmd.pio_words[2] =
|
|
|
|
GPMI_ECCCTRL_ENABLE_ECC |
|
|
|
|
GPMI_ECCCTRL_ECC_CMD_ENCODE |
|
|
|
|
GPMI_ECCCTRL_BUFFER_MASK_BCH_PAGE;
|
|
|
|
d->cmd.pio_words[3] = (mtd->writesize + mtd->oobsize);
|
|
|
|
d->cmd.pio_words[4] = (dma_addr_t)nand_info->data_buf;
|
|
|
|
d->cmd.pio_words[5] = (dma_addr_t)nand_info->oob_buf;
|
|
|
|
|
|
|
|
mxs_dma_desc_append(channel, d);
|
|
|
|
|
|
|
|
/* Execute the DMA chain. */
|
|
|
|
ret = mxs_dma_go(channel);
|
|
|
|
if (ret) {
|
|
|
|
printf("MXS NAND: DMA write error\n");
|
|
|
|
goto rtn;
|
|
|
|
}
|
|
|
|
|
2013-07-09 15:03:04 +00:00
|
|
|
ret = mxs_nand_wait_for_bch_complete(nand_info);
|
2011-12-18 22:26:39 +00:00
|
|
|
if (ret) {
|
|
|
|
printf("MXS NAND: BCH write timeout\n");
|
|
|
|
goto rtn;
|
|
|
|
}
|
|
|
|
|
|
|
|
rtn:
|
|
|
|
mxs_nand_return_dma_descs(nand_info);
|
2013-07-18 13:10:50 +00:00
|
|
|
|
|
|
|
return ret;
|
2011-12-18 22:26:39 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Read OOB from NAND.
|
|
|
|
*
|
|
|
|
* This function is a veneer that replaces the function originally installed by
|
|
|
|
* the NAND Flash MTD code.
|
|
|
|
*/
|
|
|
|
static int mxs_nand_hook_read_oob(struct mtd_info *mtd, loff_t from,
|
|
|
|
struct mtd_oob_ops *ops)
|
|
|
|
{
|
|
|
|
struct nand_chip *chip = mtd->priv;
|
|
|
|
struct mxs_nand_info *nand_info = chip->priv;
|
|
|
|
int ret;
|
|
|
|
|
2013-03-01 15:17:40 +00:00
|
|
|
if (ops->mode == MTD_OPS_RAW)
|
2011-12-18 22:26:39 +00:00
|
|
|
nand_info->raw_oob_mode = 1;
|
|
|
|
else
|
|
|
|
nand_info->raw_oob_mode = 0;
|
|
|
|
|
|
|
|
ret = nand_info->hooked_read_oob(mtd, from, ops);
|
|
|
|
|
|
|
|
nand_info->raw_oob_mode = 0;
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Write OOB to NAND.
|
|
|
|
*
|
|
|
|
* This function is a veneer that replaces the function originally installed by
|
|
|
|
* the NAND Flash MTD code.
|
|
|
|
*/
|
|
|
|
static int mxs_nand_hook_write_oob(struct mtd_info *mtd, loff_t to,
|
|
|
|
struct mtd_oob_ops *ops)
|
|
|
|
{
|
|
|
|
struct nand_chip *chip = mtd->priv;
|
|
|
|
struct mxs_nand_info *nand_info = chip->priv;
|
|
|
|
int ret;
|
|
|
|
|
2013-03-01 15:17:40 +00:00
|
|
|
if (ops->mode == MTD_OPS_RAW)
|
2011-12-18 22:26:39 +00:00
|
|
|
nand_info->raw_oob_mode = 1;
|
|
|
|
else
|
|
|
|
nand_info->raw_oob_mode = 0;
|
|
|
|
|
|
|
|
ret = nand_info->hooked_write_oob(mtd, to, ops);
|
|
|
|
|
|
|
|
nand_info->raw_oob_mode = 0;
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Mark a block bad in NAND.
|
|
|
|
*
|
|
|
|
* This function is a veneer that replaces the function originally installed by
|
|
|
|
* the NAND Flash MTD code.
|
|
|
|
*/
|
|
|
|
static int mxs_nand_hook_block_markbad(struct mtd_info *mtd, loff_t ofs)
|
|
|
|
{
|
|
|
|
struct nand_chip *chip = mtd->priv;
|
|
|
|
struct mxs_nand_info *nand_info = chip->priv;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
nand_info->marking_block_bad = 1;
|
|
|
|
|
|
|
|
ret = nand_info->hooked_block_markbad(mtd, ofs);
|
|
|
|
|
|
|
|
nand_info->marking_block_bad = 0;
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* There are several places in this driver where we have to handle the OOB and
|
|
|
|
* block marks. This is the function where things are the most complicated, so
|
|
|
|
* this is where we try to explain it all. All the other places refer back to
|
|
|
|
* here.
|
|
|
|
*
|
|
|
|
* These are the rules, in order of decreasing importance:
|
|
|
|
*
|
|
|
|
* 1) Nothing the caller does can be allowed to imperil the block mark, so all
|
|
|
|
* write operations take measures to protect it.
|
|
|
|
*
|
|
|
|
* 2) In read operations, the first byte of the OOB we return must reflect the
|
|
|
|
* true state of the block mark, no matter where that block mark appears in
|
|
|
|
* the physical page.
|
|
|
|
*
|
|
|
|
* 3) ECC-based read operations return an OOB full of set bits (since we never
|
|
|
|
* allow ECC-based writes to the OOB, it doesn't matter what ECC-based reads
|
|
|
|
* return).
|
|
|
|
*
|
|
|
|
* 4) "Raw" read operations return a direct view of the physical bytes in the
|
|
|
|
* page, using the conventional definition of which bytes are data and which
|
|
|
|
* are OOB. This gives the caller a way to see the actual, physical bytes
|
|
|
|
* in the page, without the distortions applied by our ECC engine.
|
|
|
|
*
|
|
|
|
* What we do for this specific read operation depends on whether we're doing
|
|
|
|
* "raw" read, or an ECC-based read.
|
|
|
|
*
|
|
|
|
* It turns out that knowing whether we want an "ECC-based" or "raw" read is not
|
|
|
|
* easy. When reading a page, for example, the NAND Flash MTD code calls our
|
|
|
|
* ecc.read_page or ecc.read_page_raw function. Thus, the fact that MTD wants an
|
|
|
|
* ECC-based or raw view of the page is implicit in which function it calls
|
|
|
|
* (there is a similar pair of ECC-based/raw functions for writing).
|
|
|
|
*
|
|
|
|
* Since MTD assumes the OOB is not covered by ECC, there is no pair of
|
|
|
|
* ECC-based/raw functions for reading or or writing the OOB. The fact that the
|
|
|
|
* caller wants an ECC-based or raw view of the page is not propagated down to
|
|
|
|
* this driver.
|
|
|
|
*
|
|
|
|
* Since our OOB *is* covered by ECC, we need this information. So, we hook the
|
|
|
|
* ecc.read_oob and ecc.write_oob function pointers in the owning
|
|
|
|
* struct mtd_info with our own functions. These hook functions set the
|
|
|
|
* raw_oob_mode field so that, when control finally arrives here, we'll know
|
|
|
|
* what to do.
|
|
|
|
*/
|
|
|
|
static int mxs_nand_ecc_read_oob(struct mtd_info *mtd, struct nand_chip *nand,
|
2013-07-18 13:10:50 +00:00
|
|
|
int page)
|
2011-12-18 22:26:39 +00:00
|
|
|
{
|
|
|
|
struct mxs_nand_info *nand_info = nand->priv;
|
|
|
|
int column;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* First, fill in the OOB buffer. If we're doing a raw read, we need to
|
|
|
|
* get the bytes from the physical page. If we're not doing a raw read,
|
|
|
|
* we need to fill the buffer with set bits.
|
|
|
|
*/
|
|
|
|
if (nand_info->raw_oob_mode && nand_info->version > GPMI_VERSION_TYPE_MX23) {
|
|
|
|
/*
|
|
|
|
* If control arrives here, we're doing a "raw" read. Send the
|
|
|
|
* command to read the conventional OOB and read it.
|
|
|
|
*/
|
|
|
|
nand->cmdfunc(mtd, NAND_CMD_READ0, mtd->writesize, page);
|
|
|
|
nand->read_buf(mtd, nand->oob_poi, mtd->oobsize);
|
|
|
|
} else {
|
|
|
|
/*
|
|
|
|
* If control arrives here, we're not doing a "raw" read. Fill
|
|
|
|
* the OOB buffer with set bits and correct the block mark.
|
|
|
|
*/
|
|
|
|
memset(nand->oob_poi, 0xff, mtd->oobsize);
|
|
|
|
|
|
|
|
column = nand_info->version == GPMI_VERSION_TYPE_MX23 ? 0 : mtd->writesize;
|
|
|
|
nand->cmdfunc(mtd, NAND_CMD_READ0, column, page);
|
|
|
|
mxs_nand_read_buf(mtd, nand->oob_poi, 1);
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Write OOB data to NAND.
|
|
|
|
*/
|
|
|
|
static int mxs_nand_ecc_write_oob(struct mtd_info *mtd, struct nand_chip *nand,
|
|
|
|
int page)
|
|
|
|
{
|
|
|
|
struct mxs_nand_info *nand_info = nand->priv;
|
|
|
|
int column;
|
|
|
|
uint8_t block_mark = 0;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* There are fundamental incompatibilities between the i.MX GPMI NFC and
|
|
|
|
* the NAND Flash MTD model that make it essentially impossible to write
|
|
|
|
* the out-of-band bytes.
|
|
|
|
*
|
|
|
|
* We permit *ONE* exception. If the *intent* of writing the OOB is to
|
|
|
|
* mark a block bad, we can do that.
|
|
|
|
*/
|
|
|
|
|
|
|
|
if (!nand_info->marking_block_bad) {
|
|
|
|
printf("NXS NAND: Writing OOB isn't supported\n");
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
column = nand_info->version == GPMI_VERSION_TYPE_MX23 ? 0 : mtd->writesize;
|
|
|
|
/* Write the block mark. */
|
|
|
|
nand->cmdfunc(mtd, NAND_CMD_SEQIN, column, page);
|
|
|
|
nand->write_buf(mtd, &block_mark, 1);
|
|
|
|
nand->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
|
|
|
|
|
|
|
|
/* Check if it worked. */
|
|
|
|
if (nand->waitfunc(mtd, nand) & NAND_STATUS_FAIL)
|
|
|
|
return -EIO;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Claims all blocks are good.
|
|
|
|
*
|
|
|
|
* In principle, this function is *only* called when the NAND Flash MTD system
|
|
|
|
* isn't allowed to keep an in-memory bad block table, so it is forced to ask
|
|
|
|
* the driver for bad block information.
|
|
|
|
*
|
|
|
|
* In fact, we permit the NAND Flash MTD system to have an in-memory BBT, so
|
|
|
|
* this function is *only* called when we take it away.
|
|
|
|
*
|
|
|
|
* Thus, this function is only called when we want *all* blocks to look good,
|
|
|
|
* so it *always* return success.
|
|
|
|
*/
|
|
|
|
static int mxs_nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip)
|
|
|
|
{
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Nominally, the purpose of this function is to look for or create the bad
|
|
|
|
* block table. In fact, since the we call this function at the very end of
|
|
|
|
* the initialization process started by nand_scan(), and we doesn't have a
|
|
|
|
* more formal mechanism, we "hook" this function to continue init process.
|
|
|
|
*
|
|
|
|
* At this point, the physical NAND Flash chips have been identified and
|
|
|
|
* counted, so we know the physical geometry. This enables us to make some
|
|
|
|
* important configuration decisions.
|
|
|
|
*
|
|
|
|
* The return value of this function propogates directly back to this driver's
|
|
|
|
* call to nand_scan(). Anything other than zero will cause this driver to
|
|
|
|
* tear everything down and declare failure.
|
|
|
|
*/
|
|
|
|
static int mxs_nand_scan_bbt(struct mtd_info *mtd)
|
|
|
|
{
|
|
|
|
struct nand_chip *nand = mtd->priv;
|
|
|
|
struct mxs_nand_info *nand_info = nand->priv;
|
2013-07-09 15:03:04 +00:00
|
|
|
void __iomem *bch_regs = nand_info->bch_base;
|
2013-07-22 10:18:58 +00:00
|
|
|
uint32_t layout0, layout1;
|
2012-10-30 14:21:15 +00:00
|
|
|
int ret;
|
2011-12-18 22:26:39 +00:00
|
|
|
|
|
|
|
/* Reset BCH. Don't use SFTRST on MX23 due to Errata #2847 */
|
2013-07-09 11:01:00 +00:00
|
|
|
ret = stmp_reset_block(bch_regs + BCH_CTRL,
|
2012-10-30 14:21:15 +00:00
|
|
|
nand_info->version == GPMI_VERSION_TYPE_MX23);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
2011-12-18 22:26:39 +00:00
|
|
|
|
2013-07-22 10:18:58 +00:00
|
|
|
if (mxs_nand_is_imx6(nand_info)) {
|
|
|
|
layout0 = (mxs_nand_ecc_chunk_cnt(mtd->writesize) - 1)
|
|
|
|
<< BCH_FLASHLAYOUT0_NBLOCKS_OFFSET |
|
|
|
|
MXS_NAND_METADATA_SIZE << BCH_FLASHLAYOUT0_META_SIZE_OFFSET |
|
|
|
|
(mxs_nand_get_ecc_strength(mtd->writesize, mtd->oobsize) >> 1)
|
|
|
|
<< IMX6_BCH_FLASHLAYOUT0_ECC0_OFFSET |
|
|
|
|
MXS_NAND_CHUNK_DATA_CHUNK_SIZE >> 2;
|
|
|
|
|
|
|
|
layout1 = (mtd->writesize + mtd->oobsize)
|
|
|
|
<< BCH_FLASHLAYOUT1_PAGE_SIZE_OFFSET |
|
|
|
|
(mxs_nand_get_ecc_strength(mtd->writesize, mtd->oobsize) >> 1)
|
|
|
|
<< IMX6_BCH_FLASHLAYOUT1_ECCN_OFFSET |
|
|
|
|
MXS_NAND_CHUNK_DATA_CHUNK_SIZE >> 2;
|
|
|
|
} else {
|
|
|
|
layout0 = (mxs_nand_ecc_chunk_cnt(mtd->writesize) - 1)
|
|
|
|
<< BCH_FLASHLAYOUT0_NBLOCKS_OFFSET |
|
|
|
|
MXS_NAND_METADATA_SIZE << BCH_FLASHLAYOUT0_META_SIZE_OFFSET |
|
|
|
|
(mxs_nand_get_ecc_strength(mtd->writesize, mtd->oobsize) >> 1)
|
|
|
|
<< BCH_FLASHLAYOUT0_ECC0_OFFSET |
|
|
|
|
MXS_NAND_CHUNK_DATA_CHUNK_SIZE;
|
|
|
|
|
|
|
|
layout1 = (mtd->writesize + mtd->oobsize)
|
|
|
|
<< BCH_FLASHLAYOUT1_PAGE_SIZE_OFFSET |
|
|
|
|
(mxs_nand_get_ecc_strength(mtd->writesize, mtd->oobsize) >> 1)
|
|
|
|
<< BCH_FLASHLAYOUT1_ECCN_OFFSET |
|
|
|
|
MXS_NAND_CHUNK_DATA_CHUNK_SIZE;
|
|
|
|
}
|
|
|
|
|
|
|
|
writel(layout0, bch_regs + BCH_FLASH0LAYOUT0);
|
|
|
|
writel(layout1, bch_regs + BCH_FLASH0LAYOUT1);
|
2011-12-18 22:26:39 +00:00
|
|
|
|
|
|
|
/* Set *all* chip selects to use layout 0 */
|
|
|
|
writel(0, bch_regs + BCH_LAYOUTSELECT);
|
|
|
|
|
|
|
|
/* Enable BCH complete interrupt */
|
2013-07-09 11:01:00 +00:00
|
|
|
writel(BCH_CTRL_COMPLETE_IRQ_EN, bch_regs + BCH_CTRL + STMP_OFFSET_REG_SET);
|
2011-12-18 22:26:39 +00:00
|
|
|
|
|
|
|
/* Hook some operations at the MTD level. */
|
|
|
|
if (mtd->read_oob != mxs_nand_hook_read_oob) {
|
|
|
|
nand_info->hooked_read_oob = mtd->read_oob;
|
|
|
|
mtd->read_oob = mxs_nand_hook_read_oob;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (mtd->write_oob != mxs_nand_hook_write_oob) {
|
|
|
|
nand_info->hooked_write_oob = mtd->write_oob;
|
|
|
|
mtd->write_oob = mxs_nand_hook_write_oob;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (mtd->block_markbad != mxs_nand_hook_block_markbad) {
|
|
|
|
nand_info->hooked_block_markbad = mtd->block_markbad;
|
|
|
|
mtd->block_markbad = mxs_nand_hook_block_markbad;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* We use the reference implementation for bad block management. */
|
|
|
|
return nand_default_bbt(mtd);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Allocate DMA buffers
|
|
|
|
*/
|
|
|
|
int mxs_nand_alloc_buffers(struct mxs_nand_info *nand_info)
|
|
|
|
{
|
|
|
|
uint8_t *buf;
|
|
|
|
const int size = NAND_MAX_PAGESIZE + NAND_MAX_OOBSIZE;
|
|
|
|
|
|
|
|
/* DMA buffers */
|
|
|
|
buf = dma_alloc_coherent(size);
|
|
|
|
if (!buf) {
|
|
|
|
printf("MXS NAND: Error allocating DMA buffers\n");
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
memset(buf, 0, size);
|
|
|
|
|
|
|
|
nand_info->data_buf = buf;
|
|
|
|
nand_info->oob_buf = buf + NAND_MAX_PAGESIZE;
|
|
|
|
|
|
|
|
/* Command buffers */
|
|
|
|
nand_info->cmd_buf = dma_alloc_coherent(MXS_NAND_COMMAND_BUFFER_SIZE);
|
|
|
|
if (!nand_info->cmd_buf) {
|
|
|
|
free(buf);
|
|
|
|
printf("MXS NAND: Error allocating command buffers\n");
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
memset(nand_info->cmd_buf, 0, MXS_NAND_COMMAND_BUFFER_SIZE);
|
|
|
|
nand_info->cmd_queue_len = 0;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Initializes the NFC hardware.
|
|
|
|
*/
|
|
|
|
int mxs_nand_hw_init(struct mxs_nand_info *info)
|
|
|
|
{
|
2013-07-09 14:44:17 +00:00
|
|
|
void __iomem *gpmi_regs = info->io_base;
|
2013-07-09 15:03:04 +00:00
|
|
|
void __iomem *bch_regs = info->bch_base;
|
2012-10-30 14:21:15 +00:00
|
|
|
int i = 0, ret;
|
2011-12-18 22:26:39 +00:00
|
|
|
u32 val;
|
|
|
|
|
|
|
|
info->desc = malloc(sizeof(struct mxs_dma_desc *) *
|
|
|
|
MXS_NAND_DMA_DESCRIPTOR_COUNT);
|
|
|
|
if (!info->desc)
|
|
|
|
goto err1;
|
|
|
|
|
|
|
|
/* Allocate the DMA descriptors. */
|
|
|
|
for (i = 0; i < MXS_NAND_DMA_DESCRIPTOR_COUNT; i++) {
|
|
|
|
info->desc[i] = mxs_dma_desc_alloc();
|
|
|
|
if (!info->desc[i])
|
|
|
|
goto err2;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Reset the GPMI block. */
|
2013-07-09 11:01:00 +00:00
|
|
|
ret = stmp_reset_block(gpmi_regs + GPMI_CTRL0, 0);
|
2012-10-30 14:21:15 +00:00
|
|
|
if (ret)
|
|
|
|
return ret;
|
2011-12-18 22:26:39 +00:00
|
|
|
|
2012-12-05 19:02:47 +00:00
|
|
|
val = readl(gpmi_regs + GPMI_VERSION);
|
|
|
|
info->version = val >> GPMI_VERSION_MINOR_OFFSET;
|
|
|
|
|
|
|
|
/* Reset BCH. Don't use SFTRST on MX23 due to Errata #2847 */
|
2013-07-09 11:01:00 +00:00
|
|
|
ret = stmp_reset_block(bch_regs + BCH_CTRL,
|
2012-12-05 19:02:47 +00:00
|
|
|
info->version == GPMI_VERSION_TYPE_MX23);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
2011-12-18 22:26:39 +00:00
|
|
|
/*
|
|
|
|
* Choose NAND mode, set IRQ polarity, disable write protection and
|
|
|
|
* select BCH ECC.
|
|
|
|
*/
|
|
|
|
val = readl(gpmi_regs + GPMI_CTRL1);
|
|
|
|
val &= ~GPMI_CTRL1_GPMI_MODE;
|
|
|
|
val |= GPMI_CTRL1_ATA_IRQRDY_POLARITY | GPMI_CTRL1_DEV_RESET |
|
|
|
|
GPMI_CTRL1_BCH_MODE;
|
|
|
|
writel(val, gpmi_regs + GPMI_CTRL1);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
err2:
|
|
|
|
free(info->desc);
|
|
|
|
err1:
|
|
|
|
for (--i; i >= 0; i--)
|
|
|
|
mxs_dma_desc_free(info->desc[i]);
|
|
|
|
printf("MXS NAND: Unable to allocate DMA descriptors\n");
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
2013-07-22 10:19:46 +00:00
|
|
|
static void mxs_nand_probe_dt(struct device_d *dev, struct mxs_nand_info *nand_info)
|
|
|
|
{
|
|
|
|
struct nand_chip *nand = &nand_info->nand_chip;
|
|
|
|
|
|
|
|
if (!IS_ENABLED(CONFIG_OFTREE))
|
|
|
|
return;
|
|
|
|
|
|
|
|
if (of_get_nand_on_flash_bbt(dev->device_node))
|
|
|
|
nand->bbt_options |= NAND_BBT_USE_FLASH | NAND_BBT_NO_OOB;
|
|
|
|
}
|
|
|
|
|
2011-12-18 22:26:39 +00:00
|
|
|
static int mxs_nand_probe(struct device_d *dev)
|
|
|
|
{
|
|
|
|
struct mxs_nand_info *nand_info;
|
|
|
|
struct nand_chip *nand;
|
|
|
|
struct mtd_info *mtd;
|
2013-07-22 10:18:58 +00:00
|
|
|
enum gpmi_type type;
|
2011-12-18 22:26:39 +00:00
|
|
|
int err;
|
|
|
|
|
2013-07-22 10:18:58 +00:00
|
|
|
err = dev_get_drvdata(dev, (unsigned long *)&type);
|
|
|
|
if (err)
|
|
|
|
type = GPMI_MXS;
|
|
|
|
|
2011-12-18 22:26:39 +00:00
|
|
|
nand_info = kzalloc(sizeof(struct mxs_nand_info), GFP_KERNEL);
|
|
|
|
if (!nand_info) {
|
|
|
|
printf("MXS NAND: Failed to allocate private data\n");
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
2013-07-22 10:19:46 +00:00
|
|
|
mxs_nand_probe_dt(dev, nand_info);
|
|
|
|
|
2013-07-22 10:18:58 +00:00
|
|
|
nand_info->type = type;
|
2011-12-18 22:26:39 +00:00
|
|
|
nand_info->io_base = dev_request_mem_region(dev, 0);
|
2013-07-09 15:03:04 +00:00
|
|
|
nand_info->bch_base = dev_request_mem_region(dev, 1);
|
2011-12-18 22:26:39 +00:00
|
|
|
|
2013-04-17 14:05:18 +00:00
|
|
|
nand_info->clk = clk_get(dev, NULL);
|
|
|
|
if (IS_ERR(nand_info->clk))
|
|
|
|
return PTR_ERR(nand_info->clk);
|
|
|
|
|
2013-07-22 10:18:58 +00:00
|
|
|
if (mxs_nand_is_imx6(nand_info)) {
|
|
|
|
clk_set_rate(nand_info->clk, 96000000);
|
|
|
|
clk_enable(nand_info->clk);
|
|
|
|
nand_info->dma_channel_base = 0;
|
|
|
|
} else {
|
|
|
|
nand_info->dma_channel_base = MXS_DMA_CHANNEL_AHB_APBH_GPMI0;
|
2013-09-10 17:13:32 +00:00
|
|
|
clk_enable(nand_info->clk);
|
2013-07-22 10:18:58 +00:00
|
|
|
}
|
2013-04-17 14:05:18 +00:00
|
|
|
|
2011-12-18 22:26:39 +00:00
|
|
|
err = mxs_nand_alloc_buffers(nand_info);
|
|
|
|
if (err)
|
|
|
|
goto err1;
|
|
|
|
|
|
|
|
err = mxs_nand_hw_init(nand_info);
|
|
|
|
if (err)
|
|
|
|
goto err2;
|
|
|
|
|
|
|
|
memset(&fake_ecc_layout, 0, sizeof(fake_ecc_layout));
|
|
|
|
|
|
|
|
/* structures must be linked */
|
|
|
|
nand = &nand_info->nand_chip;
|
|
|
|
mtd = &nand_info->mtd;
|
|
|
|
mtd->priv = nand;
|
2012-10-16 15:25:37 +00:00
|
|
|
mtd->parent = dev;
|
2011-12-18 22:26:39 +00:00
|
|
|
|
|
|
|
nand->priv = nand_info;
|
|
|
|
|
|
|
|
nand->cmd_ctrl = mxs_nand_cmd_ctrl;
|
|
|
|
|
|
|
|
nand->dev_ready = mxs_nand_device_ready;
|
|
|
|
nand->select_chip = mxs_nand_select_chip;
|
|
|
|
nand->block_bad = mxs_nand_block_bad;
|
|
|
|
nand->scan_bbt = mxs_nand_scan_bbt;
|
|
|
|
|
|
|
|
nand->read_byte = mxs_nand_read_byte;
|
|
|
|
|
|
|
|
nand->read_buf = mxs_nand_read_buf;
|
|
|
|
nand->write_buf = mxs_nand_write_buf;
|
|
|
|
|
|
|
|
nand->ecc.read_page = mxs_nand_ecc_read_page;
|
|
|
|
nand->ecc.write_page = mxs_nand_ecc_write_page;
|
|
|
|
nand->ecc.read_oob = mxs_nand_ecc_read_oob;
|
|
|
|
nand->ecc.write_oob = mxs_nand_ecc_write_oob;
|
|
|
|
|
|
|
|
nand->ecc.layout = &fake_ecc_layout;
|
|
|
|
nand->ecc.mode = NAND_ECC_HW;
|
|
|
|
nand->ecc.bytes = 9;
|
|
|
|
nand->ecc.size = 512;
|
2013-07-18 13:02:58 +00:00
|
|
|
nand->ecc.strength = 8;
|
2011-12-18 22:26:39 +00:00
|
|
|
|
2012-12-17 15:36:57 +00:00
|
|
|
/* first scan to find the device and get the page size */
|
2014-03-10 11:39:52 +00:00
|
|
|
err = nand_scan_ident(mtd, 4, NULL);
|
2012-12-17 15:36:57 +00:00
|
|
|
if (err)
|
|
|
|
goto err2;
|
|
|
|
|
|
|
|
nand->options |= NAND_NO_SUBPAGE_WRITE;
|
|
|
|
|
|
|
|
/* second phase scan */
|
|
|
|
err = nand_scan_tail(mtd);
|
2011-12-18 22:26:39 +00:00
|
|
|
if (err)
|
|
|
|
goto err2;
|
|
|
|
|
2013-02-27 13:25:30 +00:00
|
|
|
return add_mtd_nand_device(mtd, "nand");
|
2011-12-18 22:26:39 +00:00
|
|
|
err2:
|
|
|
|
free(nand_info->data_buf);
|
|
|
|
free(nand_info->cmd_buf);
|
|
|
|
err1:
|
|
|
|
free(nand_info);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2013-07-22 10:18:58 +00:00
|
|
|
static __maybe_unused struct of_device_id gpmi_dt_ids[] = {
|
|
|
|
{
|
|
|
|
.compatible = "fsl,imx23-gpmi-nand",
|
|
|
|
.data = GPMI_MXS,
|
|
|
|
}, {
|
|
|
|
.compatible = "fsl,imx28-gpmi-nand",
|
|
|
|
.data = GPMI_MXS,
|
|
|
|
}, {
|
|
|
|
.compatible = "fsl,imx6q-gpmi-nand",
|
|
|
|
.data = GPMI_IMX6,
|
|
|
|
}, {
|
|
|
|
/* sentinel */
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
2011-12-18 22:26:39 +00:00
|
|
|
static struct driver_d mxs_nand_driver = {
|
|
|
|
.name = "mxs_nand",
|
|
|
|
.probe = mxs_nand_probe,
|
2013-07-22 10:18:58 +00:00
|
|
|
.of_compatible = DRV_OF_COMPAT(gpmi_dt_ids),
|
2011-12-18 22:26:39 +00:00
|
|
|
};
|
2013-02-12 18:08:57 +00:00
|
|
|
device_platform_driver(mxs_nand_driver);
|
2011-12-18 22:26:39 +00:00
|
|
|
|
|
|
|
MODULE_AUTHOR("Denx Software Engeneering and Wolfram Sang");
|
|
|
|
MODULE_DESCRIPTION("MXS NAND MTD driver");
|
|
|
|
MODULE_LICENSE("GPL");
|