The NAND layer needs to use cache-aligned buffers by default. Towards this goal. align the default buffers and their members according to the minimum DMA alignment defined for the architecture.

Signed-off-by: Simon Glass sjg@chromium.org --- Changes in v2: - Add new patch to align default buffers in nand_base

drivers/mtd/nand/nand_base.c | 3 ++- include/linux/mtd/nand.h | 7 ++++--- 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 44f7b91..7bfc29e 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -2935,7 +2935,8 @@ int nand_scan_tail(struct mtd_info *mtd) struct nand_chip *chip = mtd->priv;

if (!(chip->options & NAND_OWN_BUFFERS)) - chip->buffers = kmalloc(sizeof(*chip->buffers), GFP_KERNEL); + chip->buffers = memalign(ARCH_DMA_MINALIGN, + sizeof(*chip->buffers)); if (!chip->buffers) return -ENOMEM;

diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index da6fa18..ae0bdf6 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -391,9 +391,10 @@ struct nand_ecc_ctrl { * consecutive order. */ struct nand_buffers { - uint8_t ecccalc[NAND_MAX_OOBSIZE]; - uint8_t ecccode[NAND_MAX_OOBSIZE]; - uint8_t databuf[NAND_MAX_PAGESIZE + NAND_MAX_OOBSIZE]; + uint8_t ecccalc[ALIGN(NAND_MAX_OOBSIZE, ARCH_DMA_MINALIGN)]; + uint8_t ecccode[ALIGN(NAND_MAX_OOBSIZE, ARCH_DMA_MINALIGN)]; + uint8_t databuf[ALIGN(NAND_MAX_PAGESIZE + NAND_MAX_OOBSIZE, + ARCH_DMA_MINALIGN)]; };

/**

Add selection of NAND flash pins to the funcmux.

Signed-off-by: Simon Glass sjg@chromium.org Acked-by: Stephen Warren swarren@nvidia.com ---

arch/arm/cpu/armv7/tegra2/funcmux.c | 7 +++++++ arch/arm/include/asm/arch-tegra2/funcmux.h | 3 +++ 2 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/arch/arm/cpu/armv7/tegra2/funcmux.c b/arch/arm/cpu/armv7/tegra2/funcmux.c index c1d2dfe..8931d5e 100644 --- a/arch/arm/cpu/armv7/tegra2/funcmux.c +++ b/arch/arm/cpu/armv7/tegra2/funcmux.c @@ -169,6 +169,13 @@ int funcmux_select(enum periph_id id, int config) } break;

+ case PERIPH_ID_NDFLASH: + if (config == FUNCMUX_NDFLASH_ATC) { + pinmux_set_func(PINGRP_ATC, PMUX_FUNC_NAND); + pinmux_tristate_disable(PINGRP_ATC); + } + break; + default: debug("%s: invalid periph_id %d", __func__, id); return -1; diff --git a/arch/arm/include/asm/arch-tegra2/funcmux.h b/arch/arm/include/asm/arch-tegra2/funcmux.h index ae73c72..9419522 100644 --- a/arch/arm/include/asm/arch-tegra2/funcmux.h +++ b/arch/arm/include/asm/arch-tegra2/funcmux.h @@ -47,6 +47,9 @@ enum { FUNCMUX_SDMMC4_ATC_ATD_8BIT = 0, FUNCMUX_SDMMC4_ATB_GMA_4_BIT, FUNCMUX_SDMMC4_ATB_GMA_GME_8_BIT, + + /* NAND flags */ + FUNCMUX_NDFLASH_ATC = 0, };

/**

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@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 at 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)

This enables NAND support for the Seaboard.

Signed-off-by: Simon Glass sjg@chromium.org ---

include/configs/seaboard.h | 9 +++++++++ 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/include/configs/seaboard.h b/include/configs/seaboard.h index 5d33dc5..3306622 100644 --- a/include/configs/seaboard.h +++ b/include/configs/seaboard.h @@ -105,4 +105,13 @@ #define CONFIG_USB_STORAGE #define CONFIG_CMD_USB

+/* NAND support */ +#define CONFIG_CMD_NAND +#define CONFIG_TEGRA2_NAND + +/* Max number of NAND devices */ +#define CONFIG_SYS_MAX_NAND_DEVICE 1 + +/* Somewhat oddly, the NAND base address must be a config option */ +#define CONFIG_SYS_NAND_BASE TEGRA2_NAND_BASE #endif /* __CONFIG_H */