+++ /dev/null
-/*
- * Overview:
- * Platform independent driver for NDFC (NanD Flash Controller)
- * integrated into IBM/AMCC PPC4xx cores
- *
- * (C) Copyright 2006-2009
- * Stefan Roese, DENX Software Engineering, sr@denx.de.
- *
- * Based on original work by
- * Thomas Gleixner
- * Copyright 2006 IBM
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-
-#include <common.h>
-#include <nand.h>
-#include <linux/mtd/ndfc.h>
-#include <linux/mtd/nand_ecc.h>
-#include <asm/processor.h>
-#include <asm/io.h>
-#include <asm/ppc4xx.h>
-
-#ifndef CONFIG_SYS_NAND_BCR
-#define CONFIG_SYS_NAND_BCR 0x80002222
-#endif
-#ifndef CONFIG_SYS_NDFC_EBC0_CFG
-#define CONFIG_SYS_NDFC_EBC0_CFG 0xb8400000
-#endif
-
-/*
- * We need to store the info, which chip-select (CS) is used for the
- * chip number. For example on Sequoia NAND chip #0 uses
- * CS #3.
- */
-static int ndfc_cs[NDFC_MAX_BANKS];
-
-static void ndfc_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
-{
- struct nand_chip *this = mtd_to_nand(mtd);
- ulong base = (ulong) this->IO_ADDR_W & 0xffffff00;
-
- if (cmd == NAND_CMD_NONE)
- return;
-
- if (ctrl & NAND_CLE)
- out_8((u8 *)(base + NDFC_CMD), cmd & 0xFF);
- else
- out_8((u8 *)(base + NDFC_ALE), cmd & 0xFF);
-}
-
-static int ndfc_dev_ready(struct mtd_info *mtdinfo)
-{
- struct nand_chip *this = mtd_to_nand(mtdinfo);
- ulong base = (ulong) this->IO_ADDR_W & 0xffffff00;
-
- return (in_be32((u32 *)(base + NDFC_STAT)) & NDFC_STAT_IS_READY);
-}
-
-static void ndfc_enable_hwecc(struct mtd_info *mtdinfo, int mode)
-{
- struct nand_chip *this = mtd_to_nand(mtdinfo);
- ulong base = (ulong) this->IO_ADDR_W & 0xffffff00;
- u32 ccr;
-
- ccr = in_be32((u32 *)(base + NDFC_CCR));
- ccr |= NDFC_CCR_RESET_ECC;
- out_be32((u32 *)(base + NDFC_CCR), ccr);
-}
-
-static int ndfc_calculate_ecc(struct mtd_info *mtdinfo,
- const u_char *dat, u_char *ecc_code)
-{
- struct nand_chip *this = mtd_to_nand(mtdinfo);
- ulong base = (ulong) this->IO_ADDR_W & 0xffffff00;
- u32 ecc;
- u8 *p = (u8 *)&ecc;
-
- ecc = in_be32((u32 *)(base + NDFC_ECC));
-
- /* The NDFC uses Smart Media (SMC) bytes order
- */
- ecc_code[0] = p[1];
- ecc_code[1] = p[2];
- ecc_code[2] = p[3];
-
- return 0;
-}
-
-/*
- * Speedups for buffer read/write/verify
- *
- * NDFC allows 32bit read/write of data. So we can speed up the buffer
- * functions. No further checking, as nand_base will always read/write
- * page aligned.
- */
-static void ndfc_read_buf(struct mtd_info *mtdinfo, uint8_t *buf, int len)
-{
- struct nand_chip *this = mtd_to_nand(mtdinfo);
- ulong base = (ulong) this->IO_ADDR_W & 0xffffff00;
- uint32_t *p = (uint32_t *) buf;
-
- for (;len > 0; len -= 4)
- *p++ = in_be32((u32 *)(base + NDFC_DATA));
-}
-
-/*
- * Don't use these speedup functions in NAND boot image, since the image
- * has to fit into 4kByte.
- */
-static void ndfc_write_buf(struct mtd_info *mtdinfo, const uint8_t *buf, int len)
-{
- struct nand_chip *this = mtd_to_nand(mtdinfo);
- ulong base = (ulong) this->IO_ADDR_W & 0xffffff00;
- uint32_t *p = (uint32_t *) buf;
-
- for (; len > 0; len -= 4)
- out_be32((u32 *)(base + NDFC_DATA), *p++);
-}
-
-/*
- * Read a byte from the NDFC.
- */
-static uint8_t ndfc_read_byte(struct mtd_info *mtd)
-{
-
- struct nand_chip *chip = mtd_to_nand(mtd);
-
-#ifdef CONFIG_SYS_NAND_BUSWIDTH_16BIT
- return (uint8_t) readw(chip->IO_ADDR_R);
-#else
- return readb(chip->IO_ADDR_R);
-#endif
-
-}
-
-void board_nand_select_device(struct nand_chip *nand, int chip)
-{
- /*
- * Don't use "chip" to address the NAND device,
- * generate the cs from the address where it is encoded.
- */
- ulong base = (ulong)nand->IO_ADDR_W & 0xffffff00;
- int cs = ndfc_cs[chip];
-
- /* Set NandFlash Core Configuration Register */
- /* 1 col x 2 rows */
- out_be32((u32 *)(base + NDFC_CCR), 0x00000000 | (cs << 24));
- out_be32((u32 *)(base + NDFC_BCFG0 + (cs << 2)), CONFIG_SYS_NAND_BCR);
-}
-
-static void ndfc_select_chip(struct mtd_info *mtd, int chip)
-{
- /*
- * Nothing to do here!
- */
-}
-
-int board_nand_init(struct nand_chip *nand)
-{
- int cs = (ulong)nand->IO_ADDR_W & 0x00000003;
- ulong base = (ulong)nand->IO_ADDR_W & 0xffffff00;
- static int chip = 0;
-
- /*
- * Save chip-select for this chip #
- */
- ndfc_cs[chip] = cs;
-
- /*
- * Select required NAND chip in NDFC
- */
- board_nand_select_device(nand, chip);
-
- nand->IO_ADDR_R = (void __iomem *)(base + NDFC_DATA);
- nand->IO_ADDR_W = (void __iomem *)(base + NDFC_DATA);
- nand->cmd_ctrl = ndfc_hwcontrol;
- nand->chip_delay = 50;
- nand->read_buf = ndfc_read_buf;
- nand->dev_ready = ndfc_dev_ready;
- nand->ecc.correct = nand_correct_data;
- nand->ecc.hwctl = ndfc_enable_hwecc;
- nand->ecc.calculate = ndfc_calculate_ecc;
- nand->ecc.mode = NAND_ECC_HW;
- nand->ecc.size = 256;
- nand->ecc.bytes = 3;
- nand->ecc.strength = 1;
- nand->select_chip = ndfc_select_chip;
-
-#ifdef CONFIG_SYS_NAND_BUSWIDTH_16BIT
- nand->options |= NAND_BUSWIDTH_16;
-#endif
-
- nand->write_buf = ndfc_write_buf;
- nand->read_byte = ndfc_read_byte;
-
- chip++;
-
- return 0;
-}
projects / u-boot.git / commitdiff
