[U-Boot] [PATCH v3 6/7] tegra: nand: Add Tegra NAND driver

Simon Glass
2012-04-17T18:50:13Z

From: Jim Lin <jilin@nvidia.com>

A device tree is used to configure the NAND, including memory
timings and block/pages sizes.

If this node is not present or is disabled, then NAND will not
be initialized.

Signed-off-by: Jim Lin <jilin@nvidia.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
---
Changes in v2:
- Added comment about the behaviour of the 'resp' register
- Call set_bus_width_page_size() at init to report errors earlier
- Change set_bus_width_page_size() to return an error when needed
- Change timing structure member to u32 to match device tree
- Check for supported bus width in board_nand_init()
- Fix tegra nand header file to remove BIT defines
- Implement a dummy nand_select_chip() instead of nand_hwcontro()
- Make nand_command() display an error on an unknown command
- Minor code tidy-ups in driver for style
- Move cache logic into a separate dma_prepare() function
- Remove CMD_TRANS_SIZE_BYTESx enum
- Remove space after casts
- Remove use of 'register' variables
- Rename struct nand_info to struct nand_drv to avoid nand_info_t confusion
- Support 4096 byte page devices, drop 1024 and 2048
- Tidy up nand_waitfor_cmd_completion() logic
- Update NAND binding to add "nvidia," prefix
- Use s32 for device tree integer values

Changes in v3:
- Update fdt binding to make everything Nvidia-specific

arch/arm/include/asm/arch-tegra2/tegra2.h | 1 +
drivers/mtd/nand/Makefile | 1 +
drivers/mtd/nand/tegra2_nand.c | 1095 +++++++++++++++++++++++++++++
drivers/mtd/nand/tegra2_nand.h | 257 +++++++
include/fdtdec.h | 1 +
lib/fdtdec.c | 1 +
6 files changed, 1356 insertions(+), 0 deletions(-)
create mode 100644 drivers/mtd/nand/tegra2_nand.c
create mode 100644 drivers/mtd/nand/tegra2_nand.h

diff --git a/arch/arm/include/asm/arch-tegra2/tegra2.h b/arch/arm/include/asm/arch-tegra2/tegra2.h
index d4ada10..a080b63 100644
--- a/arch/arm/include/asm/arch-tegra2/tegra2.h
+++ b/arch/arm/include/asm/arch-tegra2/tegra2.h
@@ -39,6 +39,7 @@
#define NV_PA_APB_UARTC_BASE (NV_PA_APB_MISC_BASE + 0x6200)
#define NV_PA_APB_UARTD_BASE (NV_PA_APB_MISC_BASE + 0x6300)
#define NV_PA_APB_UARTE_BASE (NV_PA_APB_MISC_BASE + 0x6400)
+#define TEGRA2_NAND_BASE (NV_PA_APB_MISC_BASE + 0x8000)
#define TEGRA2_SPI_BASE (NV_PA_APB_MISC_BASE + 0xC380)
#define TEGRA2_PMC_BASE (NV_PA_APB_MISC_BASE + 0xE400)
#define TEGRA2_FUSE_BASE (NV_PA_APB_MISC_BASE + 0xF800)
diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index 1d1b628..7efccf8 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -61,6 +61,7 @@ COBJS-$(CONFIG_NAND_NOMADIK) += nomadik.o
COBJS-$(CONFIG_NAND_S3C2410) += s3c2410_nand.o
COBJS-$(CONFIG_NAND_S3C64XX) += s3c64xx.o
COBJS-$(CONFIG_NAND_SPEAR) += spr_nand.o
+COBJS-$(CONFIG_TEGRA2_NAND) += tegra2_nand.o
COBJS-$(CONFIG_NAND_OMAP_GPMC) += omap_gpmc.o
COBJS-$(CONFIG_NAND_PLAT) += nand_plat.o
endif
diff --git a/drivers/mtd/nand/tegra2_nand.c b/drivers/mtd/nand/tegra2_nand.c
new file mode 100644
index 0000000..55dd16f
--- /dev/null
+++ b/drivers/mtd/nand/tegra2_nand.c
@@ -0,0 +1,1095 @@
+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ * (C) Copyright 2011 NVIDIA Corporation <www.nvidia.com>
+ * (C) Copyright 2006 Detlev Zundel, dzu at denx.de
+ * (C) Copyright 2006 DENX Software Engineering
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#define DEBUG
+
+#include <common.h>
+#include <asm/io.h>
+#include <nand.h>
+#include <asm/arch/clk_rst.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/funcmux.h>
+#include <asm/arch/gpio.h>
+#include <asm/errno.h>
+#include <asm-generic/gpio.h>
+#include <fdtdec.h>
+#include "tegra2_nand.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define NAND_CMD_TIMEOUT_MS 10
+
+static struct nand_ecclayout eccoob = {
+ .eccpos = {
+ 4, 5, 6, 7, 8, 9, 10, 11, 12,
+ 13, 14, 15, 16, 17, 18, 19, 20, 21,
+ 22, 23, 24, 25, 26, 27, 28, 29, 30,
+ 31, 32, 33, 34, 35, 36, 37, 38, 39,
+ 60, 61, 62, 63,
+ },
+};
+
+enum {
+ ECC_OK,
+ ECC_TAG_ERROR = 1 << 0,
+ ECC_DATA_ERROR = 1 << 1
+};
+
+/* Timing parameters */
+enum {
+ FDT_NAND_MAX_TRP_TREA,
+ FDT_NAND_TWB,
+ FDT_NAND_MAX_TCR_TAR_TRR,
+ FDT_NAND_TWHR,
+ FDT_NAND_MAX_TCS_TCH_TALS_TALH,
+ FDT_NAND_TWH,
+ FDT_NAND_TWP,
+ FDT_NAND_TRH,
+ FDT_NAND_TADL,
+
+ FDT_NAND_TIMING_COUNT
+};
+
+/* Information about an attached NAND chip */
+struct fdt_nand {
+ struct nand_ctlr *reg;
+ int enabled; /* 1 to enable, 0 to disable */
+ struct fdt_gpio_state wp_gpio; /* write-protect GPIO */
+ s32 width; /* bit width, normally 8 */
+ s32 tag_ecc_bytes; /* ECC bytes to be generated for tag bytes */
+ s32 tag_bytes; /* Tag bytes in spare area */
+ s32 data_ecc_bytes; /* ECC bytes for data area */
+ s32 skipped_spare_bytes;
+ /*
+ * How many bytes in spare area:
+ * spare area = skipped bytes + ECC bytes of data area
+ * + tag bytes + ECC bytes of tag bytes
+ */
+ s32 page_spare_bytes;
+ s32 page_data_bytes; /* Bytes in data area */
+ u32 timing[FDT_NAND_TIMING_COUNT];
+};
+
+struct nand_drv {
+ struct nand_ctlr *reg;
+
+ /*
+ * When running in PIO mode to get READ ID bytes from register
+ * RESP_0, we need this variable as an index to know which byte in
+ * register RESP_0 should be read.
+ * Because common code in nand_base.c invokes read_byte function two
+ * times for NAND_CMD_READID.
+ * And our controller returns 4 bytes@once in register RESP_0.
+ */
+ int pio_byte_index;
+ struct fdt_nand config;
+};
+
+static struct nand_drv nand_ctrl;
+
+#ifdef CONFIG_SYS_DCACHE_OFF
+static inline void dma_prepare(void *start, unsigned long length,
+ int is_writing)
+{
+}
+#else
+/**
+ * Prepare for a DMA transaction
+ *
+ * For a write we flush out our data. For a read we invalidate, since we
+ * need to do this before we read from the buffer after the DMA has
+ * completed, so may as well do it now.
+ *
+ * @param start Start address for DMA buffer (should be cache-aligned)
+ * @param length Length of DMA buffer in bytes
+ * @param is_writing 0 if reading, non-zero if writing
+ */
+static void dma_prepare(void *start, unsigned long length, int is_writing)
+{
+ unsigned long addr = (unsigned long)start;
+
+ if (is_writing)
+ flush_dcache_range(addr, addr + length);
+ else
+ invalidate_dcache_range(addr, addr + length);
+}
+#endif
+
+/**
+ * Wait for command completion
+ *
+ * @param reg nand_ctlr structure
+ * @return
+ * 1 - Command completed
+ * 0 - Timeout
+ */
+static int nand_waitfor_cmd_completion(struct nand_ctlr *reg)
+{
+ u32 reg_val;
+ int running;
+ int i;
+
+ for (i = 0; i < NAND_CMD_TIMEOUT_MS * 1000; i++) {
+ if ((readl(&reg->command) & CMD_GO) ||
+ !(readl(&reg->status) & STATUS_RBSY0) ||
+ !(readl(&reg->isr) & ISR_IS_CMD_DONE)) {
+ udelay(1);
+ continue;
+ }
+ reg_val = readl(&reg->dma_mst_ctrl);
+ /*
+ * If DMA_MST_CTRL_EN_A_ENABLE or DMA_MST_CTRL_EN_B_ENABLE
+ * is set, that means DMA engine is running.
+ *
+ * Then we have to wait until DMA_MST_CTRL_IS_DMA_DONE
+ * is cleared, indicating DMA transfer completion.
+ */
+ running = reg_val & (DMA_MST_CTRL_EN_A_ENABLE |
+ DMA_MST_CTRL_EN_B_ENABLE);
+ if (!running || (reg_val & DMA_MST_CTRL_IS_DMA_DONE))
+ return 1;
+ udelay(1);
+ }
+ return 0;
+}
+
+/**
+ * [DEFAULT] Read one byte from the chip
+ *
+ * @param mtd MTD device structure
+ * @return data byte
+ *
+ * Default read function for 8bit bus-width
+ */
+static uint8_t read_byte(struct mtd_info *mtd)
+{
+ struct nand_chip *chip = mtd->priv;
+ u32 dword_read;
+ struct nand_drv *info;
+
+ info = (struct nand_drv *)chip->priv;
+ if (info->pio_byte_index > 3)
+ return 0;
+
+ /* We can read this data multiple times and get the same word */
+ dword_read = readl(&info->reg->resp);
+ dword_read = dword_read >> (8 * info->pio_byte_index);
+ info->pio_byte_index++;
+ return (uint8_t)dword_read;
+}
+
+/**
+ * [DEFAULT] Write buffer to chip
+ *
+ * @param mtd MTD device structure
+ * @param buf data buffer
+ * @param len number of bytes to write
+ *
+ * Default write function for 8bit bus-width
+ */
+static void write_buf(struct mtd_info *mtd, const uint8_t *buf, int len)
+{
+ int i, j, l;
+ struct nand_chip *chip = mtd->priv;
+ struct nand_drv *info;
+
+ info = (struct nand_drv *)chip->priv;
+
+ for (i = 0; i < len / 4; i++) {
+ l = ((int *)buf)[i];
+ writel(l, &info->reg->resp);
+ writel(CMD_GO | CMD_PIO | CMD_TX |
+ ((4 - 1) << CMD_TRANS_SIZE_SHIFT)
+ | CMD_A_VALID | CMD_CE0,
+ &info->reg->command);
+
+ if (!nand_waitfor_cmd_completion(info->reg))
+ printf("Command timeout during write_buf\n");
+ }
+ if (len & 3) {
+ l = 0;
+ for (j = 0; j < (len & 3); j++)
+ l |= (((int)buf[i * 4 + j]) << (8 * j));
+
+ writel(l, &info->reg->resp);
+ writel(CMD_GO | CMD_PIO | CMD_TX |
+ (((len & 3) - 1) << CMD_TRANS_SIZE_SHIFT) |
+ CMD_A_VALID | CMD_CE0,
+ &info->reg->command);
+ if (!nand_waitfor_cmd_completion(info->reg))
+ printf("Command timeout during write_buf\n");
+ }
+}
+
+/**
+ * [DEFAULT] Read chip data into buffer
+ *
+ * @param mtd MTD device structure
+ * @param buf buffer to store date
+ * @param len number of bytes to read
+ *
+ * Default read function for 8bit bus-width
+ */
+static void read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
+{
+ int i, j, l;
+ struct nand_chip *chip = mtd->priv;
+ int *buf_dword;
+ struct nand_drv *info;
+
+ info = (struct nand_drv *)chip->priv;
+
+ buf_dword = (int *)buf;
+ for (i = 0; i < len / 4; i++) {
+ writel(CMD_GO | CMD_PIO | CMD_RX |
+ ((4 - 1) << CMD_TRANS_SIZE_SHIFT)
+ | CMD_A_VALID | CMD_CE0,
+ &info->reg->command);
+ if (!nand_waitfor_cmd_completion(info->reg))
+ printf("Command timeout during read_buf\n");
+ l = readl(&info->reg->resp);
+ buf_dword[i] = l;
+ }
+ if (len & 3) {
+ writel(CMD_GO | CMD_PIO | CMD_RX |
+ (((len & 3) - 1) << CMD_TRANS_SIZE_SHIFT) |
+ CMD_A_VALID | CMD_CE0,
+ &info->reg->command);
+ if (!nand_waitfor_cmd_completion(info->reg))
+ printf("Command timeout during read_buf\n");
+ l = readl(&info->reg->resp);
+ for (j = 0; j < (len & 3); j++)
+ buf[i * 4 + j] = (char) (l >> (8 * j));
+ }
+}
+
+/**
+ * Check NAND status to see if it is ready or not
+ *
+ * @param mtd MTD device structure
+ * @return
+ * 1 - ready
+ * 0 - not ready
+ */
+static int nand_dev_ready(struct mtd_info *mtd)
+{
+ struct nand_chip *chip = mtd->priv;
+ int reg_val;
+ struct nand_drv *info;
+
+ info = (struct nand_drv *)chip->priv;
+
+ reg_val = readl(&info->reg->status);
+ if (reg_val & STATUS_RBSY0)
+ return 1;
+ else
+ return 0;
+}
+
+/* Dummy implementation: we don't support multiple chips */
+static void nand_select_chip(struct mtd_info *mtd, int chipnr)
+{
+ switch (chipnr) {
+ case -1:
+ case 0:
+ break;
+
+ default:
+ BUG();
+ }
+}
+
+/**
+ * Clear all interrupt status bits
+ *
+ * @param reg nand_ctlr structure
+ */
+static void nand_clear_interrupt_status(struct nand_ctlr *reg)
+{
+ u32 reg_val;
+
+ /* Clear interrupt status */
+ reg_val = readl(&reg->isr);
+ writel(reg_val, &reg->isr);
+}
+
+/**
+ * [DEFAULT] Send command to NAND device
+ *
+ * @param mtd MTD device structure
+ * @param command the command to be sent
+ * @param column the column address for this command, -1 if none
+ * @param page_addr the page address for this command, -1 if none
+ */
+static void nand_command(struct mtd_info *mtd, unsigned int command,
+ int column, int page_addr)
+{
+ struct nand_chip *chip = mtd->priv;
+ struct nand_drv *info;
+
+ info = (struct nand_drv *)chip->priv;
+
+ /*
+ * Write out the command to the device.
+ *
+ * Only command NAND_CMD_RESET or NAND_CMD_READID will come
+ * here before mtd->writesize is initialized.
+ */
+
+ /* Emulate NAND_CMD_READOOB */
+ if (command == NAND_CMD_READOOB) {
+ assert(mtd->writesize != 0);
+ column += mtd->writesize;
+ command = NAND_CMD_READ0;
+ }
+
+ /* Adjust columns for 16 bit bus-width */
+ if (column != -1 && (chip->options & NAND_BUSWIDTH_16))
+ column >>= 1;
+
+ nand_clear_interrupt_status(info->reg);
+
+ /* Stop DMA engine, clear DMA completion status */
+ writel(DMA_MST_CTRL_EN_A_DISABLE
+ | DMA_MST_CTRL_EN_B_DISABLE
+ | DMA_MST_CTRL_IS_DMA_DONE,
+ &info->reg->dma_mst_ctrl);
+
+ /*
+ * Program and erase have their own busy handlers
+ * status and sequential in needs no delay
+ */
+ switch (command) {
+ case NAND_CMD_READID:
+ writel(NAND_CMD_READID, &info->reg->cmd_reg1);
+ writel(CMD_GO | CMD_CLE | CMD_ALE | CMD_PIO
+ | CMD_RX |
+ ((4 - 1) << CMD_TRANS_SIZE_SHIFT)
+ | CMD_CE0,
+ &info->reg->command);
+ info->pio_byte_index = 0;
+ break;
+ case NAND_CMD_READ0:
+ writel(NAND_CMD_READ0, &info->reg->cmd_reg1);
+ writel(NAND_CMD_READSTART, &info->reg->cmd_reg2);
+ writel((page_addr << 16) | (column & 0xFFFF),
+ &info->reg->addr_reg1);
+ writel(page_addr >> 16, &info->reg->addr_reg2);
+ return;
+ case NAND_CMD_SEQIN:
+ writel(NAND_CMD_SEQIN, &info->reg->cmd_reg1);
+ writel(NAND_CMD_PAGEPROG, &info->reg->cmd_reg2);
+ writel((page_addr << 16) | (column & 0xFFFF),
+ &info->reg->addr_reg1);
+ writel(page_addr >> 16,
+ &info->reg->addr_reg2);
+ return;
+ case NAND_CMD_PAGEPROG:
+ return;
+ case NAND_CMD_ERASE1:
+ writel(NAND_CMD_ERASE1, &info->reg->cmd_reg1);
+ writel(NAND_CMD_ERASE2, &info->reg->cmd_reg2);
+ writel(page_addr, &info->reg->addr_reg1);
+ writel(CMD_GO | CMD_CLE | CMD_ALE |
+ CMD_SEC_CMD | CMD_CE0 | CMD_ALE_BYTES3,
+ &info->reg->command);
+ break;
+ case NAND_CMD_RNDOUT:
+ printf("%s: Unsupported RNDOUT command\n", __func__);
+ return;
+ case NAND_CMD_ERASE2:
+ return;
+ case NAND_CMD_STATUS:
+ writel(NAND_CMD_STATUS, &info->reg->cmd_reg1);
+ writel(CMD_GO | CMD_CLE | CMD_PIO | CMD_RX
+ | ((1 - 0) << CMD_TRANS_SIZE_SHIFT)
+ | CMD_CE0,
+ &info->reg->command);
+ info->pio_byte_index = 0;
+ break;
+ case NAND_CMD_RESET:
+ writel(NAND_CMD_RESET, &info->reg->cmd_reg1);
+ writel(CMD_GO | CMD_CLE | CMD_CE0,
+ &info->reg->command);
+ break;
+ default:
+ printf("%s: Unsupported command %d\n", __func__, command);
+ return;
+ }
+ if (!nand_waitfor_cmd_completion(info->reg))
+ printf("Command 0x%02X timeout\n", command);
+}
+
+/**
+ * Check whether the pointed buffer are all 0xff (blank).
+ *
+ * @param buf data buffer for blank check
+ * @param len length of the buffer in byte
+ * @return
+ * 1 - blank
+ * 0 - non-blank
+ */
+static int blank_check(u8 *buf, int len)
+{
+ int i;
+
+ for (i = 0; i < len; i++)
+ if (buf[i] != 0xFF)
+ return 0;
+ return 1;
+}
+
+/**
+ * After a DMA transfer for read, we call this function to see whether there
+ * is any uncorrectable error on the pointed data buffer or oob buffer.
+ *
+ * @param reg nand_ctlr structure
+ * @param databuf data buffer
+ * @param a_len data buffer length
+ * @param oobbuf oob buffer
+ * @param b_len oob buffer length
+ * @return
+ * ECC_OK - no ECC error or correctable ECC error
+ * ECC_TAG_ERROR - uncorrectable tag ECC error
+ * ECC_DATA_ERROR - uncorrectable data ECC error
+ * ECC_DATA_ERROR + ECC_TAG_ERROR - uncorrectable data+tag ECC error
+ */
+static int check_ecc_error(struct nand_ctlr *reg, u8 *databuf,
+ int a_len, u8 *oobbuf, int b_len)
+{
+ int return_val = ECC_OK;
+ u32 reg_val;
+
+ if (!(readl(&reg->isr) & ISR_IS_ECC_ERR))
+ return ECC_OK;
+
+ reg_val = readl(&reg->dec_status);
+ if ((reg_val & DEC_STATUS_A_ECC_FAIL) && databuf) {
+ reg_val = readl(&reg->bch_dec_status_buf);
+ /*
+ * If uncorrectable error occurs on data area, then see whether
+ * they are all FF. If all are FF, it's a blank page.
+ * Not error.
+ */
+ if ((reg_val & BCH_DEC_STATUS_FAIL_SEC_FLAG_MASK) &&
+ !blank_check(databuf, a_len))
+ return_val |= ECC_DATA_ERROR;
+ }
+
+ if ((reg_val & DEC_STATUS_B_ECC_FAIL) && oobbuf) {
+ reg_val = readl(&reg->bch_dec_status_buf);
+ /*
+ * If uncorrectable error occurs on tag area, then see whether
+ * they are all FF. If all are FF, it's a blank page.
+ * Not error.
+ */
+ if ((reg_val & BCH_DEC_STATUS_FAIL_TAG_MASK) &&
+ !blank_check(oobbuf, b_len))
+ return_val |= ECC_TAG_ERROR;
+ }
+
+ return return_val;
+}
+
+/**
+ * Set GO bit to send command to device
+ *
+ * @param reg nand_ctlr structure
+ */
+static void start_command(struct nand_ctlr *reg)
+{
+ u32 reg_val;
+
+ reg_val = readl(&reg->command);
+ reg_val |= CMD_GO;
+ writel(reg_val, &reg->command);
+}
+
+/**
+ * Clear command GO bit, DMA GO bit, and DMA completion status
+ *
+ * @param reg nand_ctlr structure
+ */
+static void stop_command(struct nand_ctlr *reg)
+{
+ /* Stop command */
+ writel(0, &reg->command);
+
+ /* Stop DMA engine and clear DMA completion status */
+ writel(DMA_MST_CTRL_GO_DISABLE
+ | DMA_MST_CTRL_IS_DMA_DONE,
+ &reg->dma_mst_ctrl);
+}
+
+/**
+ * Set up NAND bus width and page size
+ *
+ * @param info nand_info structure
+ * @param *reg_val address of reg_val
+ * @return 0 if ok, -1 on error
+ */
+static int set_bus_width_page_size(struct fdt_nand *config,
+ u32 *reg_val)
+{
+ if (config->width == 8)
+ *reg_val = CFG_BUS_WIDTH_8BIT;
+ else if (config->width == 16)
+ *reg_val = CFG_BUS_WIDTH_16BIT;
+ else {
+ debug("%s: Unsupported bus width %d\n", __func__,
+ config->width);
+ return -1;
+ }
+
+ if (config->page_data_bytes == 512)
+ *reg_val |= CFG_PAGE_SIZE_512;
+ else if (config->page_data_bytes == 2048)
+ *reg_val |= CFG_PAGE_SIZE_2048;
+ else if (config->page_data_bytes == 4096)
+ *reg_val |= CFG_PAGE_SIZE_4096;
+ else {
+ debug("%s: Unsupported page size %d\n", __func__,
+ config->page_data_bytes);
+ return -1;
+ }
+
+ return 0;
+}
+
+/**
+ * Page read/write function
+ *
+ * @param mtd mtd info structure
+ * @param chip nand chip info structure
+ * @param buf data buffer
+ * @param page page number
+ * @param with_ecc 1 to enable ECC, 0 to disable ECC
+ * @param is_writing 0 for read, 1 for write
+ * @return 0 when successfully completed
+ * -EIO when command timeout
+ */
+static int nand_rw_page(struct mtd_info *mtd, struct nand_chip *chip,
+ uint8_t *buf, int page, int with_ecc, int is_writing)
+{
+ u32 reg_val;
+ int tag_size;
+ struct nand_oobfree *free = chip->ecc.layout->oobfree;
+ /* 128 is larger than the value that our HW can support. */
+ ALLOC_CACHE_ALIGN_BUFFER(u32, tag_buf, 128);
+ char *tag_ptr;
+ struct nand_drv *info;
+ struct fdt_nand *config;
+
+ if ((uintptr_t)buf & 0x03) {
+ printf("buf %p has to be 4-byte aligned\n", buf);
+ return -EINVAL;
+ }
+
+ info = (struct nand_drv *)chip->priv;
+ config = &info->config;
+ if (set_bus_width_page_size(config, &reg_val))
+ return -EINVAL;
+
+ /* Need to be 4-byte aligned */
+ tag_ptr = (char *)&tag_buf;
+
+ stop_command(info->reg);
+
+ writel((1 << chip->page_shift) - 1, &info->reg->dma_cfg_a);
+ writel((u32)buf, &info->reg->data_block_ptr);
+
+ if (with_ecc) {
+ writel((u32)tag_ptr, &info->reg->tag_ptr);
+ if (is_writing)
+ memcpy(tag_ptr, chip->oob_poi + free->offset,
+ config->tag_bytes +
+ config->tag_ecc_bytes);
+ } else
+ writel((u32)chip->oob_poi, &info->reg->tag_ptr);
+
+ /* Set ECC selection, configure ECC settings */
+ if (with_ecc) {
+ tag_size = config->tag_bytes + config->tag_ecc_bytes;
+ reg_val |= (CFG_SKIP_SPARE_SEL_4
+ | CFG_SKIP_SPARE_ENABLE
+ | CFG_HW_ECC_CORRECTION_ENABLE
+ | CFG_ECC_EN_TAG_DISABLE
+ | CFG_HW_ECC_SEL_RS
+ | CFG_HW_ECC_ENABLE
+ | CFG_TVAL4
+ | (tag_size - 1));
+
+ if (!is_writing)
+ tag_size += config->skipped_spare_bytes;
+ dma_prepare(tag_ptr, tag_size, is_writing);
+ } else {
+ tag_size = mtd->oobsize;
+ reg_val |= (CFG_SKIP_SPARE_DISABLE
+ | CFG_HW_ECC_CORRECTION_DISABLE
+ | CFG_ECC_EN_TAG_DISABLE
+ | CFG_HW_ECC_DISABLE
+ | (tag_size - 1));
+ dma_prepare(chip->oob_poi, tag_size, is_writing);
+ }
+ writel(reg_val, &info->reg->config);
+
+ dma_prepare(buf, 1 << chip->page_shift, is_writing);
+
+ writel(BCH_CONFIG_BCH_ECC_DISABLE, &info->reg->bch_config);
+
+ writel(tag_size - 1, &info->reg->dma_cfg_b);
+
+ nand_clear_interrupt_status(info->reg);
+
+ reg_val = CMD_CLE | CMD_ALE
+ | CMD_SEC_CMD
+ | (CMD_ALE_BYTES5 << CMD_ALE_BYTE_SIZE_SHIFT)
+ | CMD_A_VALID
+ | CMD_B_VALID
+ | (CMD_TRANS_SIZE_PAGE << CMD_TRANS_SIZE_SHIFT)
+ | CMD_CE0;
+ if (!is_writing)
+ reg_val |= (CMD_AFT_DAT_DISABLE | CMD_RX);
+ else
+ reg_val |= (CMD_AFT_DAT_ENABLE | CMD_TX);
+ writel(reg_val, &info->reg->command);
+
+ /* Setup DMA engine */
+ reg_val = DMA_MST_CTRL_GO_ENABLE
+ | DMA_MST_CTRL_BURST_8WORDS
+ | DMA_MST_CTRL_EN_A_ENABLE
+ | DMA_MST_CTRL_EN_B_ENABLE;
+
+ if (!is_writing)
+ reg_val |= DMA_MST_CTRL_DIR_READ;
+ else
+ reg_val |= DMA_MST_CTRL_DIR_WRITE;
+
+ writel(reg_val, &info->reg->dma_mst_ctrl);
+
+ start_command(info->reg);
+
+ if (!nand_waitfor_cmd_completion(info->reg)) {
+ if (!is_writing)
+ printf("Read Page 0x%X timeout ", page);
+ else
+ printf("Write Page 0x%X timeout ", page);
+ if (with_ecc)
+ printf("with ECC");
+ else
+ printf("without ECC");
+ printf("\n");
+ return -EIO;
+ }
+
+ if (with_ecc && !is_writing) {
+ memcpy(chip->oob_poi, tag_ptr,
+ config->skipped_spare_bytes);
+ memcpy(chip->oob_poi + free->offset,
+ tag_ptr + config->skipped_spare_bytes,
+ config->tag_bytes);
+ reg_val = (u32)check_ecc_error(info->reg, (u8 *)buf,
+ 1 << chip->page_shift,
+ (u8 *)(tag_ptr + config->skipped_spare_bytes),
+ config->tag_bytes);
+ if (reg_val & ECC_TAG_ERROR)
+ printf("Read Page 0x%X tag ECC error\n", page);
+ if (reg_val & ECC_DATA_ERROR)
+ printf("Read Page 0x%X data ECC error\n",
+ page);
+ if (reg_val & (ECC_DATA_ERROR | ECC_TAG_ERROR))
+ return -EIO;
+ }
+ return 0;
+}
+
+/**
+ * Hardware ecc based page read function
+ *
+ * @param mtd mtd info structure
+ * @param chip nand chip info structure
+ * @param buf buffer to store read data
+ * @param page page number to read
+ * @return 0 when successfully completed
+ * -EIO when command timeout
+ */
+static int nand_read_page_hwecc(struct mtd_info *mtd,
+ struct nand_chip *chip, uint8_t *buf, int page)
+{
+ return nand_rw_page(mtd, chip, buf, page, 1, 0);
+}
+
+/**
+ * Hardware ecc based page write function
+ *
+ * @param mtd mtd info structure
+ * @param chip nand chip info structure
+ * @param buf data buffer
+ */
+static void nand_write_page_hwecc(struct mtd_info *mtd,
+ struct nand_chip *chip, const uint8_t *buf)
+{
+ int page;
+ struct nand_drv *info;
+
+ info = (struct nand_drv *)chip->priv;
+
+ page = (readl(&info->reg->addr_reg1) >> 16) |
+ (readl(&info->reg->addr_reg2) << 16);
+
+ nand_rw_page(mtd, chip, (uint8_t *)buf, page, 1, 1);
+}
+
+
+/**
+ * Read raw page data without ecc
+ *
+ * @param mtd mtd info structure
+ * @param chip nand chip info structure
+ * @param buf buffer to store read data
+ * @param page page number to read
+ * @return 0 when successfully completed
+ * -EINVAL when chip->oob_poi is not double-word aligned
+ * -EIO when command timeout
+ */
+static int nand_read_page_raw(struct mtd_info *mtd,
+ struct nand_chip *chip, uint8_t *buf, int page)
+{
+ return nand_rw_page(mtd, chip, buf, page, 0, 0);
+}
+
+/**
+ * Raw page write function
+ *
+ * @param mtd mtd info structure
+ * @param chip nand chip info structure
+ * @param buf data buffer
+ */
+static void nand_write_page_raw(struct mtd_info *mtd,
+ struct nand_chip *chip, const uint8_t *buf)
+{
+ int page;
+ struct nand_drv *info;
+
+ info = (struct nand_drv *)chip->priv;
+ page = (readl(&info->reg->addr_reg1) >> 16) |
+ (readl(&info->reg->addr_reg2) << 16);
+
+ nand_rw_page(mtd, chip, (uint8_t *)buf, page, 0, 1);
+}
+
+/**
+ * OOB data read/write function
+ *
+ * @param mtd mtd info structure
+ * @param chip nand chip info structure
+ * @param page page number to read
+ * @param with_ecc 1 to enable ECC, 0 to disable ECC
+ * @param is_writing 0 for read, 1 for write
+ * @return 0 when successfully completed
+ * -EINVAL when chip->oob_poi is not double-word aligned
+ * -EIO when command timeout
+ */
+static int nand_rw_oob(struct mtd_info *mtd, struct nand_chip *chip,
+ int page, int with_ecc, int is_writing)
+{
+ u32 reg_val;
+ int tag_size;
+ struct nand_oobfree *free = chip->ecc.layout->oobfree;
+ struct nand_drv *info;
+
+ if (((int)chip->oob_poi) & 0x03)
+ return -EINVAL;
+ info = (struct nand_drv *)chip->priv;
+ if (set_bus_width_page_size(&info->config, &reg_val))
+ return -EINVAL;
+
+ stop_command(info->reg);
+
+ writel((u32)chip->oob_poi, &info->reg->tag_ptr);
+
+ /* Set ECC selection */
+ tag_size = mtd->oobsize;
+ if (with_ecc)
+ reg_val |= CFG_ECC_EN_TAG_ENABLE;
+ else
+ reg_val |= (CFG_ECC_EN_TAG_DISABLE);
+
+ reg_val |= ((tag_size - 1) |
+ CFG_SKIP_SPARE_DISABLE |
+ CFG_HW_ECC_CORRECTION_DISABLE |
+ CFG_HW_ECC_DISABLE);
+ writel(reg_val, &info->reg->config);
+
+ dma_prepare(chip->oob_poi, tag_size, is_writing);
+
+ writel(BCH_CONFIG_BCH_ECC_DISABLE, &info->reg->bch_config);
+
+ if (is_writing && with_ecc)
+ tag_size -= info->config.tag_ecc_bytes;
+
+ writel(tag_size - 1, &info->reg->dma_cfg_b);
+
+ nand_clear_interrupt_status(info->reg);
+
+ reg_val = CMD_CLE | CMD_ALE
+ | CMD_SEC_CMD
+ | (CMD_ALE_BYTES5 << CMD_ALE_BYTE_SIZE_SHIFT)
+ | CMD_B_VALID
+ | CMD_CE0;
+ if (!is_writing)
+ reg_val |= (CMD_AFT_DAT_DISABLE | CMD_RX);
+ else
+ reg_val |= (CMD_AFT_DAT_ENABLE | CMD_TX);
+ writel(reg_val, &info->reg->command);
+
+ /* Setup DMA engine */
+ reg_val = DMA_MST_CTRL_GO_ENABLE
+ | DMA_MST_CTRL_BURST_8WORDS
+ | DMA_MST_CTRL_EN_B_ENABLE;
+ if (!is_writing)
+ reg_val |= DMA_MST_CTRL_DIR_READ;
+ else
+ reg_val |= DMA_MST_CTRL_DIR_WRITE;
+
+ writel(reg_val, &info->reg->dma_mst_ctrl);
+
+ start_command(info->reg);
+
+ if (!nand_waitfor_cmd_completion(info->reg)) {
+ if (!is_writing)
+ printf("Read OOB of Page 0x%X timeout\n", page);
+ else
+ printf("Write OOB of Page 0x%X timeout\n", page);
+ return -EIO;
+ }
+
+ if (with_ecc && !is_writing) {
+ reg_val = (u32)check_ecc_error(info->reg, 0, 0,
+ (u8 *)(chip->oob_poi + free->offset),
+ info->config.tag_bytes);
+ if (reg_val & ECC_TAG_ERROR)
+ printf("Read OOB of Page 0x%X tag ECC error\n", page);
+ }
+ return 0;
+}
+
+/**
+ * OOB data read function
+ *
+ * @param mtd mtd info structure
+ * @param chip nand chip info structure
+ * @param page page number to read
+ * @param sndcmd flag whether to issue read command or not
+ * @return 1 - issue read command next time
+ * 0 - not to issue
+ */
+static int nand_read_oob(struct mtd_info *mtd, struct nand_chip *chip,
+ int page, int sndcmd)
+{
+ if (sndcmd) {
+ chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page);
+ sndcmd = 0;
+ }
+ nand_rw_oob(mtd, chip, page, 0, 0);
+ return sndcmd;
+}
+
+/**
+ * OOB data write function
+ *
+ * @param mtd mtd info structure
+ * @param chip nand chip info structure
+ * @param page page number to write
+ * @return 0 when successfully completed
+ * -EINVAL when chip->oob_poi is not double-word aligned
+ * -EIO when command timeout
+ */
+static int nand_write_oob(struct mtd_info *mtd, struct nand_chip *chip,
+ int page)
+{
+ chip->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize, page);
+
+ return nand_rw_oob(mtd, chip, page, 0, 1);
+}
+
+/**
+ * Set up NAND memory timings according to the provided parameters
+ *
+ * @param timing Timing parameters
+ * @param reg NAND controller register address
+ */
+static void setup_timing(unsigned timing[FDT_NAND_TIMING_COUNT],
+ struct nand_ctlr *reg)
+{
+ u32 reg_val, clk_rate, clk_period, time_val;
+
+ clk_rate = (u32)clock_get_periph_rate(PERIPH_ID_NDFLASH,
+ CLOCK_ID_PERIPH) / 1000000;
+ clk_period = 1000 / clk_rate;
+ reg_val = ((timing[FDT_NAND_MAX_TRP_TREA] / clk_period) <<
+ TIMING_TRP_RESP_CNT_SHIFT) & TIMING_TRP_RESP_CNT_MASK;
+ reg_val |= ((timing[FDT_NAND_TWB] / clk_period) <<
+ TIMING_TWB_CNT_SHIFT) & TIMING_TWB_CNT_MASK;
+ time_val = timing[FDT_NAND_MAX_TCR_TAR_TRR] / clk_period;
+ if (time_val > 2)
+ reg_val |= ((time_val - 2) << TIMING_TCR_TAR_TRR_CNT_SHIFT) &
+ TIMING_TCR_TAR_TRR_CNT_MASK;
+ reg_val |= ((timing[FDT_NAND_TWHR] / clk_period) <<
+ TIMING_TWHR_CNT_SHIFT) & TIMING_TWHR_CNT_MASK;
+ time_val = timing[FDT_NAND_MAX_TCS_TCH_TALS_TALH] / clk_period;
+ if (time_val > 1)
+ reg_val |= ((time_val - 1) << TIMING_TCS_CNT_SHIFT) &
+ TIMING_TCS_CNT_MASK;
+ reg_val |= ((timing[FDT_NAND_TWH] / clk_period) <<
+ TIMING_TWH_CNT_SHIFT) & TIMING_TWH_CNT_MASK;
+ reg_val |= ((timing[FDT_NAND_TWP] / clk_period) <<
+ TIMING_TWP_CNT_SHIFT) & TIMING_TWP_CNT_MASK;
+ reg_val |= ((timing[FDT_NAND_TRH] / clk_period) <<
+ TIMING_TRH_CNT_SHIFT) & TIMING_TRH_CNT_MASK;
+ reg_val |= ((timing[FDT_NAND_MAX_TRP_TREA] / clk_period) <<
+ TIMING_TRP_CNT_SHIFT) & TIMING_TRP_CNT_MASK;
+ writel(reg_val, &reg->timing);
+
+ reg_val = 0;
+ time_val = timing[FDT_NAND_TADL] / clk_period;
+ if (time_val > 2)
+ reg_val = (time_val - 2) & TIMING2_TADL_CNT_MASK;
+ writel(reg_val, &reg->timing2);
+}
+
+/**
+ * Decode NAND parameters from the device tree
+ *
+ * @param blob Device tree blob
+ * @param node Node containing "nand-flash" compatble node
+ * @return 0 if ok, -ve on error (FDT_ERR_...)
+ */
+int fdt_decode_nand(const void *blob, int node, struct fdt_nand *config)
+{
+ int err;
+
+ config->reg = (struct nand_ctlr *)fdtdec_get_addr(blob, node, "reg");
+ config->enabled = fdtdec_get_is_enabled(blob, node);
+ config->width = fdtdec_get_int(blob, node, "nvidia,nand-width", 8);
+ err = fdtdec_decode_gpio(blob, node, "nvidia,wp-gpios",
+ &config->wp_gpio);
+ if (err)
+ return err;
+ err = fdtdec_get_int_array(blob, node, "nvidia,timing",
+ config->timing, FDT_NAND_TIMING_COUNT);
+ if (err < 0)
+ return err;
+
+ /* Now look up the controller and decode that */
+ node = fdt_next_node(blob, node, NULL);
+ if (node < 0)
+ return node;
+
+ config->page_data_bytes = fdtdec_get_int(blob, node,
+ "nvidia,page-data-bytes", -1);
+ config->tag_ecc_bytes = fdtdec_get_int(blob, node,
+ "nvidia,tag-ecc-bytes", -1);
+ config->tag_bytes = fdtdec_get_int(blob, node, "nvidia,tag-bytes", -1);
+ config->data_ecc_bytes = fdtdec_get_int(blob, node,
+ "nvidia,data-ecc-bytes", -1);
+ config->skipped_spare_bytes = fdtdec_get_int(blob, node,
+ "nvidia,skipped-spare-bytes", -1);
+ config->page_spare_bytes = fdtdec_get_int(blob, node,
+ "nvidia,page-spare-bytes", -1);
+ if (config->page_data_bytes == -1 || config->tag_ecc_bytes == -1 ||
+ config->tag_bytes == -1 || config->data_ecc_bytes == -1 ||
+ config->skipped_spare_bytes == -1 ||
+ config->page_spare_bytes == -1)
+ return -FDT_ERR_NOTFOUND;
+
+ return 0;
+}
+
+/**
+ * Board-specific NAND initialization
+ *
+ * @param nand nand chip info structure
+ * @return 0, after initialized, -1 on error
+ */
+int board_nand_init(struct nand_chip *nand)
+{
+ struct nand_drv *info = &nand_ctrl;
+ struct fdt_nand *config = &info->config;
+ u32 reg_val;
+ int node;
+
+ node = fdtdec_next_compatible(gd->fdt_blob, 0,
+ COMPAT_NVIDIA_TEGRA20_NAND);
+ if (node < 0)
+ return -1;
+ if (fdt_decode_nand(gd->fdt_blob, node, config)) {
+ printf("Could not decode nand-flash in device tree\n");
+ return -1;
+ }
+ if (!config->enabled)
+ return -1;
+ if (set_bus_width_page_size(&info->config, &reg_val)) {
+ printf("NAND bus width / page size not supported\n");
+ return -EINVAL;
+ }
+ info->reg = config->reg;
+ eccoob.eccbytes = config->data_ecc_bytes + config->tag_ecc_bytes;
+ eccoob.oobavail = config->tag_bytes;
+ eccoob.oobfree[0].offset = config->skipped_spare_bytes +
+ config->data_ecc_bytes;
+ eccoob.oobfree[0].length = config->tag_bytes;
+
+ nand->ecc.mode = NAND_ECC_HW;
+ nand->ecc.layout = &eccoob;
+ nand->ecc.size = config->page_data_bytes;
+ nand->ecc.bytes = config->page_spare_bytes;
+
+ nand->options = LP_OPTIONS;
+ nand->cmdfunc = nand_command;
+ nand->read_byte = read_byte;
+ nand->read_buf = read_buf;
+ nand->write_buf = write_buf;
+ nand->ecc.read_page = nand_read_page_hwecc;
+ nand->ecc.write_page = nand_write_page_hwecc;
+ nand->ecc.read_page_raw = nand_read_page_raw;
+ nand->ecc.write_page_raw = nand_write_page_raw;
+ nand->ecc.read_oob = nand_read_oob;
+ nand->ecc.write_oob = nand_write_oob;
+ nand->select_chip = nand_select_chip;
+ nand->dev_ready = nand_dev_ready;
+ nand->priv = &nand_ctrl;
+
+ /* Adjust controller clock rate */
+ clock_start_periph_pll(PERIPH_ID_NDFLASH, CLOCK_ID_PERIPH, 52000000);
+
+ /* Adjust timing for NAND device */
+ setup_timing(config->timing, info->reg);
+
+ funcmux_select(PERIPH_ID_NDFLASH, FUNCMUX_DEFAULT);
+ fdtdec_setup_gpio(&config->wp_gpio);
+ gpio_direction_output(config->wp_gpio.gpio, 1);
+
+ return 0;
+}
diff --git a/drivers/mtd/nand/tegra2_nand.h b/drivers/mtd/nand/tegra2_nand.h
new file mode 100644
index 0000000..7e74be7
--- /dev/null
+++ b/drivers/mtd/nand/tegra2_nand.h
@@ -0,0 +1,257 @@
+/*
+ * (C) Copyright 2011 NVIDIA Corporation <www.nvidia.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/* register offset */
+#define COMMAND_0 0x00
+#define CMD_GO (1 << 31)
+#define CMD_CLE (1 << 30)
+#define CMD_ALE (1 << 29)
+#define CMD_PIO (1 << 28)
+#define CMD_TX (1 << 27)
+#define CMD_RX (1 << 26)
+#define CMD_SEC_CMD (1 << 25)
+#define CMD_AFT_DAT_MASK (1 << 24)
+#define CMD_AFT_DAT_DISABLE 0
+#define CMD_AFT_DAT_ENABLE (1 << 24)
+#define CMD_TRANS_SIZE_SHIFT 20
+#define CMD_TRANS_SIZE_PAGE 8
+#define CMD_A_VALID (1 << 19)
+#define CMD_B_VALID (1 << 18)
+#define CMD_RD_STATUS_CHK (1 << 17)
+#define CMD_R_BSY_CHK (1 << 16)
+#define CMD_CE7 (1 << 15)
+#define CMD_CE6 (1 << 14)
+#define CMD_CE5 (1 << 13)
+#define CMD_CE4 (1 << 12)
+#define CMD_CE3 (1 << 11)
+#define CMD_CE2 (1 << 10)
+#define CMD_CE1 (1 << 9)
+#define CMD_CE0 (1 << 8)
+#define CMD_CLE_BYTE_SIZE_SHIFT 4
+enum {
+ CMD_CLE_BYTES1 = 0,
+ CMD_CLE_BYTES2,
+ CMD_CLE_BYTES3,
+ CMD_CLE_BYTES4,
+};
+#define CMD_ALE_BYTE_SIZE_SHIFT 0
+enum {
+ CMD_ALE_BYTES1 = 0,
+ CMD_ALE_BYTES2,
+ CMD_ALE_BYTES3,
+ CMD_ALE_BYTES4,
+ CMD_ALE_BYTES5,
+ CMD_ALE_BYTES6,
+ CMD_ALE_BYTES7,
+ CMD_ALE_BYTES8
+};
+
+#define STATUS_0 0x04
+#define STATUS_RBSY0 (1 << 8)
+
+#define ISR_0 0x08
+#define ISR_IS_CMD_DONE (1 << 5)
+#define ISR_IS_ECC_ERR (1 << 4)
+
+#define IER_0 0x0C
+
+#define CFG_0 0x10
+#define CFG_HW_ECC_MASK (1 << 31)
+#define CFG_HW_ECC_DISABLE 0
+#define CFG_HW_ECC_ENABLE (1 << 31)
+#define CFG_HW_ECC_SEL_MASK (1 << 30)
+#define CFG_HW_ECC_SEL_HAMMING 0
+#define CFG_HW_ECC_SEL_RS (1 << 30)
+#define CFG_HW_ECC_CORRECTION_MASK (1 << 29)
+#define CFG_HW_ECC_CORRECTION_DISABLE 0
+#define CFG_HW_ECC_CORRECTION_ENABLE (1 << 29)
+#define CFG_PIPELINE_EN_MASK (1 << 28)
+#define CFG_PIPELINE_EN_DISABLE 0
+#define CFG_PIPELINE_EN_ENABLE (1 << 28)
+#define CFG_ECC_EN_TAG_MASK (1 << 27)
+#define CFG_ECC_EN_TAG_DISABLE 0
+#define CFG_ECC_EN_TAG_ENABLE (1 << 27)
+#define CFG_TVALUE_MASK (3 << 24)
+enum {
+ CFG_TVAL4 = 0 << 24,
+ CFG_TVAL6 = 1 << 24,
+ CFG_TVAL8 = 2 << 24
+};
+#define CFG_SKIP_SPARE_MASK (1 << 23)
+#define CFG_SKIP_SPARE_DISABLE 0
+#define CFG_SKIP_SPARE_ENABLE (1 << 23)
+#define CFG_COM_BSY_MASK (1 << 22)
+#define CFG_COM_BSY_DISABLE 0
+#define CFG_COM_BSY_ENABLE (1 << 22)
+#define CFG_BUS_WIDTH_MASK (1 << 21)
+#define CFG_BUS_WIDTH_8BIT 0
+#define CFG_BUS_WIDTH_16BIT (1 << 21)
+#define CFG_LPDDR1_MODE_MASK (1 << 20)
+#define CFG_LPDDR1_MODE_DISABLE 0
+#define CFG_LPDDR1_MODE_ENABLE (1 << 20)
+#define CFG_EDO_MODE_MASK (1 << 19)
+#define CFG_EDO_MODE_DISABLE 0
+#define CFG_EDO_MODE_ENABLE (1 << 19)
+#define CFG_PAGE_SIZE_SEL_MASK (7 << 16)
+enum {
+ CFG_PAGE_SIZE_256 = 0 << 16,
+ CFG_PAGE_SIZE_512 = 1 << 16,
+ CFG_PAGE_SIZE_1024 = 2 << 16,
+ CFG_PAGE_SIZE_2048 = 3 << 16,
+ CFG_PAGE_SIZE_4096 = 4 << 16
+};
+#define CFG_SKIP_SPARE_SEL_MASK (3 << 14)
+enum {
+ CFG_SKIP_SPARE_SEL_4 = 0 << 14,
+ CFG_SKIP_SPARE_SEL_8 = 1 << 14,
+ CFG_SKIP_SPARE_SEL_12 = 2 << 14,
+ CFG_SKIP_SPARE_SEL_16 = 3 << 14
+};
+#define CFG_TAG_BYTE_SIZE_MASK 0x1FF
+
+#define TIMING_0 0x14
+#define TIMING_TRP_RESP_CNT_SHIFT 28
+#define TIMING_TRP_RESP_CNT_MASK (0xf << TIMING_TRP_RESP_CNT_SHIFT)
+#define TIMING_TWB_CNT_SHIFT 24
+#define TIMING_TWB_CNT_MASK (0xf << TIMING_TWB_CNT_SHIFT)
+#define TIMING_TCR_TAR_TRR_CNT_SHIFT 20
+#define TIMING_TCR_TAR_TRR_CNT_MASK (0xf << TIMING_TCR_TAR_TRR_CNT_SHIFT)
+#define TIMING_TWHR_CNT_SHIFT 16
+#define TIMING_TWHR_CNT_MASK (0xf << TIMING_TWHR_CNT_SHIFT)
+#define TIMING_TCS_CNT_SHIFT 14
+#define TIMING_TCS_CNT_MASK (3 << TIMING_TCS_CNT_SHIFT)
+#define TIMING_TWH_CNT_SHIFT 12
+#define TIMING_TWH_CNT_MASK (3 << TIMING_TWH_CNT_SHIFT)
+#define TIMING_TWP_CNT_SHIFT 8
+#define TIMING_TWP_CNT_MASK (0xf << TIMING_TWP_CNT_SHIFT)
+#define TIMING_TRH_CNT_SHIFT 4
+#define TIMING_TRH_CNT_MASK (3 << TIMING_TRH_CNT_SHIFT)
+#define TIMING_TRP_CNT_SHIFT 0
+#define TIMING_TRP_CNT_MASK (0xf << TIMING_TRP_CNT_SHIFT)
+
+#define RESP_0 0x18
+
+#define TIMING2_0 0x1C
+#define TIMING2_TADL_CNT_SHIFT 0
+#define TIMING2_TADL_CNT_MASK (0xf << TIMING2_TADL_CNT_SHIFT)
+
+#define CMD_REG1_0 0x20
+#define CMD_REG2_0 0x24
+#define ADDR_REG1_0 0x28
+#define ADDR_REG2_0 0x2C
+
+#define DMA_MST_CTRL_0 0x30
+#define DMA_MST_CTRL_GO_MASK (1 << 31)
+#define DMA_MST_CTRL_GO_DISABLE 0
+#define DMA_MST_CTRL_GO_ENABLE (1 << 31)
+#define DMA_MST_CTRL_DIR_MASK (1 << 30)
+#define DMA_MST_CTRL_DIR_READ 0
+#define DMA_MST_CTRL_DIR_WRITE (1 << 30)
+#define DMA_MST_CTRL_PERF_EN_MASK (1 << 29)
+#define DMA_MST_CTRL_PERF_EN_DISABLE 0
+#define DMA_MST_CTRL_PERF_EN_ENABLE (1 << 29)
+#define DMA_MST_CTRL_REUSE_BUFFER_MASK (1 << 27)
+#define DMA_MST_CTRL_REUSE_BUFFER_DISABLE 0
+#define DMA_MST_CTRL_REUSE_BUFFER_ENABLE (1 << 27)
+#define DMA_MST_CTRL_BURST_SIZE_SHIFT 24
+#define DMA_MST_CTRL_BURST_SIZE_MASK (7 << DMA_MST_CTRL_BURST_SIZE_SHIFT)
+enum {
+ DMA_MST_CTRL_BURST_1WORDS = 2 << DMA_MST_CTRL_BURST_SIZE_SHIFT,
+ DMA_MST_CTRL_BURST_4WORDS = 3 << DMA_MST_CTRL_BURST_SIZE_SHIFT,
+ DMA_MST_CTRL_BURST_8WORDS = 4 << DMA_MST_CTRL_BURST_SIZE_SHIFT,
+ DMA_MST_CTRL_BURST_16WORDS = 5 << DMA_MST_CTRL_BURST_SIZE_SHIFT
+};
+#define DMA_MST_CTRL_IS_DMA_DONE (1 << 20)
+#define DMA_MST_CTRL_EN_A_MASK (1 << 2)
+#define DMA_MST_CTRL_EN_A_DISABLE 0
+#define DMA_MST_CTRL_EN_A_ENABLE (1 << 2)
+#define DMA_MST_CTRL_EN_B_MASK (1 << 1)
+#define DMA_MST_CTRL_EN_B_DISABLE 0
+#define DMA_MST_CTRL_EN_B_ENABLE (1 << 1)
+
+#define DMA_CFG_A_0 0x34
+#define DMA_CFG_B_0 0x38
+#define FIFO_CTRL_0 0x3C
+#define DATA_BLOCK_PTR_0 0x40
+#define TAG_PTR_0 0x44
+#define ECC_PTR_0 0x48
+
+#define DEC_STATUS_0 0x4C
+#define DEC_STATUS_A_ECC_FAIL (1 << 1)
+#define DEC_STATUS_B_ECC_FAIL (1 << 0)
+
+#define BCH_CONFIG_0 0xCC
+#define BCH_CONFIG_BCH_TVALUE_SHIFT 4
+#define BCH_CONFIG_BCH_TVALUE_MASK (3 << BCH_CONFIG_BCH_TVALUE_SHIFT)
+enum {
+ BCH_CONFIG_BCH_TVAL4 = 0 << BCH_CONFIG_BCH_TVALUE_SHIFT,
+ BCH_CONFIG_BCH_TVAL8 = 1 << BCH_CONFIG_BCH_TVALUE_SHIFT,
+ BCH_CONFIG_BCH_TVAL14 = 2 << BCH_CONFIG_BCH_TVALUE_SHIFT,
+ BCH_CONFIG_BCH_TVAL16 = 3 << BCH_CONFIG_BCH_TVALUE_SHIFT
+};
+#define BCH_CONFIG_BCH_ECC_MASK (1 << 0)
+#define BCH_CONFIG_BCH_ECC_DISABLE 0
+#define BCH_CONFIG_BCH_ECC_ENABLE (1 << 0)
+
+#define BCH_DEC_RESULT_0 0xD0
+#define BCH_DEC_RESULT_CORRFAIL_ERR_MASK (1 << 8)
+#define BCH_DEC_RESULT_PAGE_COUNT_MASK 0xFF
+
+#define BCH_DEC_STATUS_BUF_0 0xD4
+#define BCH_DEC_STATUS_FAIL_SEC_FLAG_MASK 0xFF000000
+#define BCH_DEC_STATUS_CORR_SEC_FLAG_MASK 0x00FF0000
+#define BCH_DEC_STATUS_FAIL_TAG_MASK (1 << 14)
+#define BCH_DEC_STATUS_CORR_TAG_MASK (1 << 13)
+#define BCH_DEC_STATUS_MAX_CORR_CNT_MASK (0x1f << 8)
+#define BCH_DEC_STATUS_PAGE_NUMBER_MASK 0xFF
+
+#define LP_OPTIONS (NAND_NO_READRDY | NAND_NO_AUTOINCR)
+
+struct nand_ctlr {
+ u32 command; /* offset 00h */
+ u32 status; /* offset 04h */
+ u32 isr; /* offset 08h */
+ u32 ier; /* offset 0Ch */
+ u32 config; /* offset 10h */
+ u32 timing; /* offset 14h */
+ u32 resp; /* offset 18h */
+ u32 timing2; /* offset 1Ch */
+ u32 cmd_reg1; /* offset 20h */
+ u32 cmd_reg2; /* offset 24h */
+ u32 addr_reg1; /* offset 28h */
+ u32 addr_reg2; /* offset 2Ch */
+ u32 dma_mst_ctrl; /* offset 30h */
+ u32 dma_cfg_a; /* offset 34h */
+ u32 dma_cfg_b; /* offset 38h */
+ u32 fifo_ctrl; /* offset 3Ch */
+ u32 data_block_ptr; /* offset 40h */
+ u32 tag_ptr; /* offset 44h */
+ u32 resv1; /* offset 48h */
+ u32 dec_status; /* offset 4Ch */
+ u32 hwstatus_cmd; /* offset 50h */
+ u32 hwstatus_mask; /* offset 54h */
+ u32 resv2[29];
+ u32 bch_config; /* offset CCh */
+ u32 bch_dec_result; /* offset D0h */
+ u32 bch_dec_status_buf;
+ /* offset D4h */
+};
diff --git a/include/fdtdec.h b/include/fdtdec.h
index 49251d5..7bae2f8 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -62,6 +62,7 @@ enum fdt_compat_id {
COMPAT_NVIDIA_TEGRA20_DVC, /* Tegra2 dvc (really just i2c) */
COMPAT_NVIDIA_TEGRA20_EMC, /* Tegra2 memory controller */
COMPAT_NVIDIA_TEGRA20_EMC_TABLE, /* Tegra2 memory timing table */
+ COMPAT_NVIDIA_TEGRA20_NAND, /* Tegra2 NAND controller */

COMPAT_COUNT,
};
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index 3885634..2eb5b41 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -42,6 +42,7 @@ static const char * const compat_names[COMPAT_COUNT] = {
COMPAT(NVIDIA_TEGRA20_DVC, "nvidia,tegra20-i2c-dvc"),
COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),
+ COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),
};

const char *fdtdec_get_compatible(enum fdt_compat_id id)
--
1.7.7.3