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authorMike Frysinger <vapier@gentoo.org>2009-05-25 22:42:28 -0400
committerScott Wood <scottwood@freescale.com>2009-07-07 17:58:04 -0500
commitcd84423a09f3a08029fe41c1db96168debd0b51f (patch)
tree877f8cda0130e3645a24aaf03c267117fa940abc /board/bf537-stamp
parentd27bc728cf35e7d7996fbd77154335e66615b213 (diff)
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mtd: nand: new base driver for memory mapped nand devices
The BF537-STAMP Blackfin board had a driver for working with NAND devices that are simply memory mapped. Since there is nothing Blackfin specific about this, generalize the driver a bit so that everyone can leverage it. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Scott Wood <scottwood@freescale.com>
Diffstat (limited to 'board/bf537-stamp')
-rw-r--r--board/bf537-stamp/Makefile1
-rw-r--r--board/bf537-stamp/nand.c100
2 files changed, 0 insertions, 101 deletions
diff --git a/board/bf537-stamp/Makefile b/board/bf537-stamp/Makefile
index 4c9e015..f728e2c 100644
--- a/board/bf537-stamp/Makefile
+++ b/board/bf537-stamp/Makefile
@@ -32,7 +32,6 @@ LIB = $(obj)lib$(BOARD).a
COBJS-y := $(BOARD).o cmd_bf537led.o
COBJS-$(CONFIG_BFIN_IDE) += ide-cf.o
COBJS-$(CONFIG_CMD_EEPROM) += spi_flash.o
-COBJS-$(CONFIG_CMD_NAND) += nand.o
COBJS-$(CONFIG_POST) += post.o post-memory.o
SRCS := $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
diff --git a/board/bf537-stamp/nand.c b/board/bf537-stamp/nand.c
deleted file mode 100644
index 181e83d..0000000
--- a/board/bf537-stamp/nand.c
+++ /dev/null
@@ -1,100 +0,0 @@
-/*
- * Copyright (c) 2006-2007 Analog Devices Inc.
- *
- * 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>
-#include <asm/io.h>
-
-#include <nand.h>
-
-#define CONCAT(a,b,c,d) a ## b ## c ## d
-#define PORT(a,b) CONCAT(pPORT,a,b,)
-
-#ifndef CONFIG_NAND_GPIO_PORT
-#define CONFIG_NAND_GPIO_PORT F
-#endif
-
-/*
- * hardware specific access to control-lines
- */
-static void bfin_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
-{
- register struct nand_chip *this = mtd->priv;
- u32 IO_ADDR_W = (u32) this->IO_ADDR_W;
-
- if (ctrl & NAND_CTRL_CHANGE) {
- if (ctrl & NAND_CLE)
- IO_ADDR_W = CONFIG_SYS_NAND_BASE + BFIN_NAND_CLE;
- else
- IO_ADDR_W = CONFIG_SYS_NAND_BASE;
- if (ctrl & NAND_ALE)
- IO_ADDR_W = CONFIG_SYS_NAND_BASE + BFIN_NAND_ALE;
- else
- IO_ADDR_W = CONFIG_SYS_NAND_BASE;
- this->IO_ADDR_W = (void __iomem *) IO_ADDR_W;
- }
- this->IO_ADDR_R = this->IO_ADDR_W;
-
- /* Drain the writebuffer */
- SSYNC();
-
- if (cmd != NAND_CMD_NONE)
- writeb(cmd, this->IO_ADDR_W);
-}
-
-int bfin_device_ready(struct mtd_info *mtd)
-{
- int ret = (*PORT(CONFIG_NAND_GPIO_PORT, IO) & BFIN_NAND_READY) ? 1 : 0;
- SSYNC();
- return ret;
-}
-
-/*
- * Board-specific NAND initialization. The following members of the
- * argument are board-specific (per include/linux/mtd/nand.h):
- * - IO_ADDR_R?: address to read the 8 I/O lines of the flash device
- * - IO_ADDR_W?: address to write the 8 I/O lines of the flash device
- * - cmd_ctrl: hardwarespecific function for accesing control-lines
- * - dev_ready: hardwarespecific function for accesing device ready/busy line
- * - enable_hwecc?: function to enable (reset) hardware ecc generator. Must
- * only be provided if a hardware ECC is available
- * - ecc.mode: mode of ecc, see defines
- * - chip_delay: chip dependent delay for transfering data from array to
- * read regs (tR)
- * - options: various chip options. They can partly be set to inform
- * nand_scan about special functionality. See the defines for further
- * explanation
- * Members with a "?" were not set in the merged testing-NAND branch,
- * so they are not set here either.
- */
-int board_nand_init(struct nand_chip *nand)
-{
- *PORT(CONFIG_NAND_GPIO_PORT, _FER) &= ~BFIN_NAND_READY;
- *PORT(CONFIG_NAND_GPIO_PORT, IO_DIR) &= ~BFIN_NAND_READY;
- *PORT(CONFIG_NAND_GPIO_PORT, IO_INEN) |= BFIN_NAND_READY;
-
- nand->cmd_ctrl = bfin_hwcontrol;
- nand->ecc.mode = NAND_ECC_SOFT;
- nand->dev_ready = bfin_device_ready;
- nand->chip_delay = 30;
-
- return 0;
-}