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Diffstat (limited to 'board/prodrive/pdnb3/nand.c')
| -rw-r--r-- | board/prodrive/pdnb3/nand.c | 172 |
1 files changed, 0 insertions, 172 deletions
diff --git a/board/prodrive/pdnb3/nand.c b/board/prodrive/pdnb3/nand.c deleted file mode 100644 index 92f9c01902..0000000000 --- a/board/prodrive/pdnb3/nand.c +++ /dev/null @@ -1,172 +0,0 @@ -/* - * (C) Copyright 2006 - * Stefan Roese, DENX Software Engineering, sr@denx.de. - * - * 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 (CONFIG_COMMANDS & CFG_CMD_NAND) - -#include <nand.h> - -struct pdnb3_ndfc_regs { - uchar cmd; - uchar wait; - uchar addr; - uchar term; - uchar data; -}; - -static u8 hwctl; -static struct pdnb3_ndfc_regs *pdnb3_ndfc; - -#define readb(addr) *(volatile u_char *)(addr) -#define readl(addr) *(volatile u_long *)(addr) -#define writeb(d,addr) *(volatile u_char *)(addr) = (d) - -/* - * The PDNB3 has a NAND Flash Controller (NDFC) that handles all accesses to - * the NAND devices. The NDFC has command, address and data registers that - * when accessed will set up the NAND flash pins appropriately. We'll use the - * hwcontrol function to save the configuration in a global variable. - * We can then use this information in the read and write functions to - * determine which NDFC register to access. - * - * There is one NAND devices on the board, a Hynix HY27US08561A (32 MByte). - */ -static void pdnb3_nand_hwcontrol(struct mtd_info *mtd, int cmd) -{ - switch (cmd) { - case NAND_CTL_SETCLE: - hwctl |= 0x1; - break; - case NAND_CTL_CLRCLE: - hwctl &= ~0x1; - break; - - case NAND_CTL_SETALE: - hwctl |= 0x2; - break; - case NAND_CTL_CLRALE: - hwctl &= ~0x2; - break; - - case NAND_CTL_SETNCE: - break; - case NAND_CTL_CLRNCE: - writeb(0x00, &(pdnb3_ndfc->term)); - break; - } -} - -static void pdnb3_nand_write_byte(struct mtd_info *mtd, u_char byte) -{ - if (hwctl & 0x1) - writeb(byte, &(pdnb3_ndfc->cmd)); - else if (hwctl & 0x2) - writeb(byte, &(pdnb3_ndfc->addr)); - else - writeb(byte, &(pdnb3_ndfc->data)); -} - -static u_char pdnb3_nand_read_byte(struct mtd_info *mtd) -{ - return readb(&(pdnb3_ndfc->data)); -} - -static void pdnb3_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len) -{ - int i; - - for (i = 0; i < len; i++) { - if (hwctl & 0x1) - writeb(buf[i], &(pdnb3_ndfc->cmd)); - else if (hwctl & 0x2) - writeb(buf[i], &(pdnb3_ndfc->addr)); - else - writeb(buf[i], &(pdnb3_ndfc->data)); - } -} - -static void pdnb3_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len) -{ - int i; - - if (len % 4) { - for (i = 0; i < len; i++) - buf[i] = readb(&(pdnb3_ndfc->data)); - } else { - ulong *ptr = (ulong *)buf; - int count = len >> 2; - - for (i = 0; i < count; i++) - *ptr++ = readl(&(pdnb3_ndfc->data)); - } -} - -static int pdnb3_nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len) -{ - int i; - - for (i = 0; i < len; i++) - if (buf[i] != readb(&(pdnb3_ndfc->data))) - return i; - - return 0; -} - -static int pdnb3_nand_dev_ready(struct mtd_info *mtd) -{ - volatile u_char val; - - /* - * Blocking read to wait for NAND to be ready - */ - val = readb(&(pdnb3_ndfc->wait)); - - /* - * Return always true - */ - return 1; -} - -int board_nand_init(struct nand_chip *nand) -{ - pdnb3_ndfc = (struct pdnb3_ndfc_regs *)CFG_NAND_BASE; - - nand->eccmode = NAND_ECC_SOFT; - - /* Set address of NAND IO lines (Using Linear Data Access Region) */ - nand->IO_ADDR_R = (void __iomem *) ((ulong) pdnb3_ndfc + 0x4); - nand->IO_ADDR_W = (void __iomem *) ((ulong) pdnb3_ndfc + 0x4); - /* Reference hardware control function */ - nand->hwcontrol = pdnb3_nand_hwcontrol; - /* Set command delay time */ - nand->hwcontrol = pdnb3_nand_hwcontrol; - nand->write_byte = pdnb3_nand_write_byte; - nand->read_byte = pdnb3_nand_read_byte; - nand->write_buf = pdnb3_nand_write_buf; - nand->read_buf = pdnb3_nand_read_buf; - nand->verify_buf = pdnb3_nand_verify_buf; - nand->dev_ready = pdnb3_nand_dev_ready; - return 0; -} -#endif |