+// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2008
- *
- * 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
*/
#include <common.h>
-#if defined(CFG_NAND_BASE)
+#if defined(CONFIG_SYS_NAND_BASE)
#include <nand.h>
-#include <asm/errno.h>
+#include <linux/errno.h>
#include <asm/io.h>
static int state;
-static void nand_write_byte(struct mtd_info *mtd, u_char byte);
-static void nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len);
-static void nand_write_word(struct mtd_info *mtd, u16 word);
-static u_char nand_read_byte(struct mtd_info *mtd);
-static u16 nand_read_word(struct mtd_info *mtd);
-static void nand_read_buf(struct mtd_info *mtd, u_char *buf, int len);
-static int nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len);
-static int nand_device_ready(struct mtd_info *mtdinfo);
-static void nand_hwcontrol(struct mtd_info *mtdinfo, int cmd);
+static void sc_nand_write_byte(struct mtd_info *mtd, u_char byte);
+static void sc_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len);
+static u_char sc_nand_read_byte(struct mtd_info *mtd);
+static u16 sc_nand_read_word(struct mtd_info *mtd);
+static void sc_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len);
+static int sc_nand_device_ready(struct mtd_info *mtdinfo);
#define FPGA_NAND_CMD_MASK (0x7 << 28)
-#define FPGA_NAND_CMD_COMMAND (0x0 << 28)
+#define FPGA_NAND_CMD_COMMAND (0x0 << 28)
#define FPGA_NAND_CMD_ADDR (0x1 << 28)
#define FPGA_NAND_CMD_READ (0x2 << 28)
#define FPGA_NAND_CMD_WRITE (0x3 << 28)
#define FPGA_NAND_BUSY (0x1 << 15)
#define FPGA_NAND_ENABLE (0x1 << 31)
-#define FPGA_NAND_DATA_SHIFT 16
+#define FPGA_NAND_DATA_SHIFT 16
/**
- * nand_write_byte - write one byte to the chip
+ * sc_nand_write_byte - write one byte to the chip
* @mtd: MTD device structure
* @byte: pointer to data byte to write
*/
-static void nand_write_byte(struct mtd_info *mtd, u_char byte)
+static void sc_nand_write_byte(struct mtd_info *mtd, u_char byte)
{
- nand_write_buf(mtd, (const uchar *)&byte, sizeof(byte));
+ sc_nand_write_buf(mtd, (const uchar *)&byte, sizeof(byte));
}
/**
- * nand_write_word - write one word to the chip
- * @mtd: MTD device structure
- * @word: data word to write
- */
-static void nand_write_word(struct mtd_info *mtd, u16 word)
-{
- nand_write_buf(mtd, (const uchar *)&word, sizeof(word));
-}
-
-/**
- * nand_write_buf - write buffer to chip
+ * sc_nand_write_buf - write buffer to chip
* @mtd: MTD device structure
* @buf: data buffer
* @len: number of bytes to write
*/
-static void nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
+static void sc_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
{
int i;
- struct nand_chip *this = mtd->priv;
- long val;
-
- if ((state & FPGA_NAND_CMD_MASK) == FPGA_NAND_CMD_MASK) {
- /* Write data */
- val = (state & FPGA_NAND_ENABLE) | FPGA_NAND_CMD_WRITE;
- } else {
- /* Write address or command */
- val = state;
- }
+ struct nand_chip *this = mtd_to_nand(mtd);
for (i = 0; i < len; i++) {
- out_be32(this->IO_ADDR_W, val | (buf[i] << FPGA_NAND_DATA_SHIFT));
+ out_be32(this->IO_ADDR_W,
+ state | (buf[i] << FPGA_NAND_DATA_SHIFT));
}
}
/**
- * nand_read_byte - read one byte from the chip
+ * sc_nand_read_byte - read one byte from the chip
* @mtd: MTD device structure
*/
-static u_char nand_read_byte(struct mtd_info *mtd)
+static u_char sc_nand_read_byte(struct mtd_info *mtd)
{
u8 byte;
- nand_read_buf(mtd, (uchar *)&byte, sizeof(byte));
+ sc_nand_read_buf(mtd, (uchar *)&byte, sizeof(byte));
return byte;
}
/**
- * nand_read_word - read one word from the chip
+ * sc_nand_read_word - read one word from the chip
* @mtd: MTD device structure
*/
-static u16 nand_read_word(struct mtd_info *mtd)
+static u16 sc_nand_read_word(struct mtd_info *mtd)
{
u16 word;
- nand_read_buf(mtd, (uchar *)&word, sizeof(word));
+ sc_nand_read_buf(mtd, (uchar *)&word, sizeof(word));
return word;
}
/**
- * nand_read_buf - read chip data into buffer
+ * sc_nand_read_buf - read chip data into buffer
* @mtd: MTD device structure
* @buf: buffer to store date
* @len: number of bytes to read
*/
-static void nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
+static void sc_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
{
int i;
- struct nand_chip *this = mtd->priv;
+ struct nand_chip *this = mtd_to_nand(mtd);
int val;
val = (state & FPGA_NAND_ENABLE) | FPGA_NAND_CMD_READ;
}
/**
- * nand_verify_buf - Verify chip data against buffer
+ * sc_nand_device_ready - Check the NAND device is ready for next command.
* @mtd: MTD device structure
- * @buf: buffer containing the data to compare
- * @len: number of bytes to compare
*/
-static int nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len)
+static int sc_nand_device_ready(struct mtd_info *mtdinfo)
{
- int i;
-
- for (i = 0; i < len; i++) {
- if (buf[i] != nand_read_byte(mtd));
- return -EFAULT;
- }
- return 0;
-}
-
-/**
- * nand_device_ready - Check the NAND device is ready for next command.
- * @mtd: MTD device structure
- */
-static int nand_device_ready(struct mtd_info *mtdinfo)
-{
- struct nand_chip *this = mtdinfo->priv;
+ struct nand_chip *this = mtd_to_nand(mtdinfo);
if (in_be32(this->IO_ADDR_W) & FPGA_NAND_BUSY)
return 0; /* busy */
}
/**
- * nand_hwcontrol - NAND control functions wrapper.
+ * sc_nand_hwcontrol - NAND control functions wrapper.
* @mtd: MTD device structure
* @cmd: Command
*/
-static void nand_hwcontrol(struct mtd_info *mtdinfo, int cmd)
+static void sc_nand_hwcontrol(struct mtd_info *mtdinfo, int cmd, unsigned int ctrl)
{
+ if (ctrl & NAND_CTRL_CHANGE) {
+ state &= ~(FPGA_NAND_CMD_MASK | FPGA_NAND_ENABLE);
- switch(cmd) {
- case NAND_CTL_CLRALE:
- state |= FPGA_NAND_CMD_MASK; /* use all 1s to mark */
- break;
- case NAND_CTL_CLRCLE:
- state |= FPGA_NAND_CMD_MASK; /* use all 1s to mark */
- break;
- case NAND_CTL_SETCLE:
- state = (state & ~FPGA_NAND_CMD_MASK) | FPGA_NAND_CMD_COMMAND;
- break;
- case NAND_CTL_SETALE:
- state = (state & ~FPGA_NAND_CMD_MASK) | FPGA_NAND_CMD_ADDR;
- break;
- case NAND_CTL_SETNCE:
- state |= FPGA_NAND_ENABLE;
- break;
- case NAND_CTL_CLRNCE:
- state &= ~FPGA_NAND_ENABLE;
- break;
- default:
- printf("%s: unknown cmd %#x\n", __FUNCTION__, cmd);
- break;
+ switch (ctrl & (NAND_ALE | NAND_CLE)) {
+ case 0:
+ state |= FPGA_NAND_CMD_WRITE;
+ break;
+
+ case NAND_ALE:
+ state |= FPGA_NAND_CMD_ADDR;
+ break;
+
+ case NAND_CLE:
+ state |= FPGA_NAND_CMD_COMMAND;
+ break;
+
+ default:
+ printf("%s: unknown ctrl %#x\n", __FUNCTION__, ctrl);
+ }
+
+ if (ctrl & NAND_NCE)
+ state |= FPGA_NAND_ENABLE;
}
+
+ if (cmd != NAND_CMD_NONE)
+ sc_nand_write_byte(mtdinfo, cmd);
}
int board_nand_init(struct nand_chip *nand)
{
- nand->hwcontrol = nand_hwcontrol;
- nand->eccmode = NAND_ECC_SOFT;
- nand->dev_ready = nand_device_ready;
- nand->write_byte = nand_write_byte;
- nand->read_byte = nand_read_byte;
- nand->write_word = nand_write_word;
- nand->read_word = nand_read_word;
- nand->write_buf = nand_write_buf;
- nand->read_buf = nand_read_buf;
- nand->verify_buf = nand_verify_buf;
+ nand->cmd_ctrl = sc_nand_hwcontrol;
+ nand->ecc.mode = NAND_ECC_SOFT;
+ nand->dev_ready = sc_nand_device_ready;
+ nand->read_byte = sc_nand_read_byte;
+ nand->read_word = sc_nand_read_word;
+ nand->write_buf = sc_nand_write_buf;
+ nand->read_buf = sc_nand_read_buf;
return 0;
}
projects / J-u-boot.git / blobdiff