diff options
author | David Woodhouse <dwmw2@shinybook.infradead.org> | 2005-07-13 15:25:59 +0100 |
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committer | David Woodhouse <dwmw2@shinybook.infradead.org> | 2005-07-13 15:25:59 +0100 |
commit | 30beab1491f0b96b2f23d3fb68af01fd921a16d8 (patch) | |
tree | c580bdc0846269fbb10feeda901ecec1a48ee2ef /drivers/mtd/nand/tx4925ndfmc.c | |
parent | 21af6c4f2aa5f63138871b4ddd77d7ebf2588c9d (diff) | |
parent | c32511e2718618f0b53479eb36e07439aa363a74 (diff) |
Merge with /shiny/git/linux-2.6/.git
Diffstat (limited to 'drivers/mtd/nand/tx4925ndfmc.c')
-rw-r--r-- | drivers/mtd/nand/tx4925ndfmc.c | 416 |
1 files changed, 0 insertions, 416 deletions
diff --git a/drivers/mtd/nand/tx4925ndfmc.c b/drivers/mtd/nand/tx4925ndfmc.c deleted file mode 100644 index bba688830c9..00000000000 --- a/drivers/mtd/nand/tx4925ndfmc.c +++ /dev/null @@ -1,416 +0,0 @@ -/* - * drivers/mtd/tx4925ndfmc.c - * - * Overview: - * This is a device driver for the NAND flash device found on the - * Toshiba RBTX4925 reference board, which is a SmartMediaCard. It supports - * 16MiB, 32MiB and 64MiB cards. - * - * Author: MontaVista Software, Inc. source@mvista.com - * - * Derived from drivers/mtd/autcpu12.c - * Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de) - * - * $Id: tx4925ndfmc.c,v 1.5 2004/10/05 13:50:20 gleixner Exp $ - * - * Copyright (C) 2001 Toshiba Corporation - * - * 2003 (c) MontaVista Software, Inc. This file is licensed under - * the terms of the GNU General Public License version 2. This program - * is licensed "as is" without any warranty of any kind, whether express - * or implied. - * - */ - -#include <linux/slab.h> -#include <linux/init.h> -#include <linux/module.h> -#include <linux/mtd/mtd.h> -#include <linux/mtd/nand.h> -#include <linux/mtd/partitions.h> -#include <linux/delay.h> -#include <asm/io.h> -#include <asm/tx4925/tx4925_nand.h> - -extern struct nand_oobinfo jffs2_oobinfo; - -/* - * MTD structure for RBTX4925 board - */ -static struct mtd_info *tx4925ndfmc_mtd = NULL; - -/* - * Define partitions for flash devices - */ - -static struct mtd_partition partition_info16k[] = { - { .name = "RBTX4925 flash partition 1", - .offset = 0, - .size = 8 * 0x00100000 }, - { .name = "RBTX4925 flash partition 2", - .offset = 8 * 0x00100000, - .size = 8 * 0x00100000 }, -}; - -static struct mtd_partition partition_info32k[] = { - { .name = "RBTX4925 flash partition 1", - .offset = 0, - .size = 8 * 0x00100000 }, - { .name = "RBTX4925 flash partition 2", - .offset = 8 * 0x00100000, - .size = 24 * 0x00100000 }, -}; - -static struct mtd_partition partition_info64k[] = { - { .name = "User FS", - .offset = 0, - .size = 16 * 0x00100000 }, - { .name = "RBTX4925 flash partition 2", - .offset = 16 * 0x00100000, - .size = 48 * 0x00100000}, -}; - -static struct mtd_partition partition_info128k[] = { - { .name = "Skip bad section", - .offset = 0, - .size = 16 * 0x00100000 }, - { .name = "User FS", - .offset = 16 * 0x00100000, - .size = 112 * 0x00100000 }, -}; -#define NUM_PARTITIONS16K 2 -#define NUM_PARTITIONS32K 2 -#define NUM_PARTITIONS64K 2 -#define NUM_PARTITIONS128K 2 - -/* - * hardware specific access to control-lines -*/ -static void tx4925ndfmc_hwcontrol(struct mtd_info *mtd, int cmd) -{ - - switch(cmd){ - - case NAND_CTL_SETCLE: - tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_CLE; - break; - case NAND_CTL_CLRCLE: - tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_CLE; - break; - case NAND_CTL_SETALE: - tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_ALE; - break; - case NAND_CTL_CLRALE: - tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_ALE; - break; - case NAND_CTL_SETNCE: - tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_CE; - break; - case NAND_CTL_CLRNCE: - tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_CE; - break; - case NAND_CTL_SETWP: - tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_WE; - break; - case NAND_CTL_CLRWP: - tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_WE; - break; - } -} - -/* -* read device ready pin -*/ -static int tx4925ndfmc_device_ready(struct mtd_info *mtd) -{ - int ready; - ready = (tx4925_ndfmcptr->sr & TX4925_NDSFR_BUSY) ? 0 : 1; - return ready; -} -void tx4925ndfmc_enable_hwecc(struct mtd_info *mtd, int mode) -{ - /* reset first */ - tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_ECC_CNTL_MASK; - tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_ECC_CNTL_MASK; - tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_ECC_CNTL_ENAB; -} -static void tx4925ndfmc_disable_ecc(void) -{ - tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_ECC_CNTL_MASK; -} -static void tx4925ndfmc_enable_read_ecc(void) -{ - tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_ECC_CNTL_MASK; - tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_ECC_CNTL_READ; -} -void tx4925ndfmc_readecc(struct mtd_info *mtd, const u_char *dat, u_char *ecc_code){ - int i; - u_char *ecc = ecc_code; - tx4925ndfmc_enable_read_ecc(); - for (i = 0;i < 6;i++,ecc++) - *ecc = tx4925_read_nfmc(&(tx4925_ndfmcptr->dtr)); - tx4925ndfmc_disable_ecc(); -} -void tx4925ndfmc_device_setup(void) -{ - - *(unsigned char *)0xbb005000 &= ~0x08; - - /* reset NDFMC */ - tx4925_ndfmcptr->rstr |= TX4925_NDFRSTR_RST; - while (tx4925_ndfmcptr->rstr & TX4925_NDFRSTR_RST); - - /* setup BusSeparete, Hold Time, Strobe Pulse Width */ - tx4925_ndfmcptr->mcr = TX4925_BSPRT ? TX4925_NDFMCR_BSPRT : 0; - tx4925_ndfmcptr->spr = TX4925_HOLD << 4 | TX4925_SPW; -} -static u_char tx4925ndfmc_nand_read_byte(struct mtd_info *mtd) -{ - struct nand_chip *this = mtd->priv; - return tx4925_read_nfmc(this->IO_ADDR_R); -} - -static void tx4925ndfmc_nand_write_byte(struct mtd_info *mtd, u_char byte) -{ - struct nand_chip *this = mtd->priv; - tx4925_write_nfmc(byte, this->IO_ADDR_W); -} - -static void tx4925ndfmc_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len) -{ - int i; - struct nand_chip *this = mtd->priv; - - for (i=0; i<len; i++) - tx4925_write_nfmc(buf[i], this->IO_ADDR_W); -} - -static void tx4925ndfmc_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len) -{ - int i; - struct nand_chip *this = mtd->priv; - - for (i=0; i<len; i++) - buf[i] = tx4925_read_nfmc(this->IO_ADDR_R); -} - -static int tx4925ndfmc_nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len) -{ - int i; - struct nand_chip *this = mtd->priv; - - for (i=0; i<len; i++) - if (buf[i] != tx4925_read_nfmc(this->IO_ADDR_R)) - return -EFAULT; - - return 0; -} - -/* - * Send command to NAND device - */ -static void tx4925ndfmc_nand_command (struct mtd_info *mtd, unsigned command, int column, int page_addr) -{ - register struct nand_chip *this = mtd->priv; - - /* Begin command latch cycle */ - this->hwcontrol(mtd, NAND_CTL_SETCLE); - /* - * Write out the command to the device. - */ - if (command == NAND_CMD_SEQIN) { - int readcmd; - - if (column >= mtd->oobblock) { - /* OOB area */ - column -= mtd->oobblock; - readcmd = NAND_CMD_READOOB; - } else if (column < 256) { - /* First 256 bytes --> READ0 */ - readcmd = NAND_CMD_READ0; - } else { - column -= 256; - readcmd = NAND_CMD_READ1; - } - this->write_byte(mtd, readcmd); - } - this->write_byte(mtd, command); - - /* Set ALE and clear CLE to start address cycle */ - this->hwcontrol(mtd, NAND_CTL_CLRCLE); - - if (column != -1 || page_addr != -1) { - this->hwcontrol(mtd, NAND_CTL_SETALE); - - /* Serially input address */ - if (column != -1) - this->write_byte(mtd, column); - if (page_addr != -1) { - this->write_byte(mtd, (unsigned char) (page_addr & 0xff)); - this->write_byte(mtd, (unsigned char) ((page_addr >> 8) & 0xff)); - /* One more address cycle for higher density devices */ - if (mtd->size & 0x0c000000) - this->write_byte(mtd, (unsigned char) ((page_addr >> 16) & 0x0f)); - } - /* Latch in address */ - this->hwcontrol(mtd, NAND_CTL_CLRALE); - } - - /* - * program and erase have their own busy handlers - * status and sequential in needs no delay - */ - switch (command) { - - case NAND_CMD_PAGEPROG: - /* Turn off WE */ - this->hwcontrol (mtd, NAND_CTL_CLRWP); - return; - - case NAND_CMD_SEQIN: - /* Turn on WE */ - this->hwcontrol (mtd, NAND_CTL_SETWP); - return; - - case NAND_CMD_ERASE1: - case NAND_CMD_ERASE2: - case NAND_CMD_STATUS: - return; - - case NAND_CMD_RESET: - if (this->dev_ready) - break; - this->hwcontrol(mtd, NAND_CTL_SETCLE); - this->write_byte(mtd, NAND_CMD_STATUS); - this->hwcontrol(mtd, NAND_CTL_CLRCLE); - while ( !(this->read_byte(mtd) & 0x40)); - return; - - /* This applies to read commands */ - default: - /* - * If we don't have access to the busy pin, we apply the given - * command delay - */ - if (!this->dev_ready) { - udelay (this->chip_delay); - return; - } - } - - /* wait until command is processed */ - while (!this->dev_ready(mtd)); -} - -#ifdef CONFIG_MTD_CMDLINE_PARTS -extern int parse_cmdline_partitions(struct mtd_info *master, struct mtd_partitio -n **pparts, char *); -#endif - -/* - * Main initialization routine - */ -extern int nand_correct_data(struct mtd_info *mtd, u_char *dat, u_char *read_ecc, u_char *calc_ecc); -int __init tx4925ndfmc_init (void) -{ - struct nand_chip *this; - int err = 0; - - /* Allocate memory for MTD device structure and private data */ - tx4925ndfmc_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct nand_chip), - GFP_KERNEL); - if (!tx4925ndfmc_mtd) { - printk ("Unable to allocate RBTX4925 NAND MTD device structure.\n"); - err = -ENOMEM; - goto out; - } - - tx4925ndfmc_device_setup(); - - /* io is indirect via a register so don't need to ioremap address */ - - /* Get pointer to private data */ - this = (struct nand_chip *) (&tx4925ndfmc_mtd[1]); - - /* Initialize structures */ - memset((char *) tx4925ndfmc_mtd, 0, sizeof(struct mtd_info)); - memset((char *) this, 0, sizeof(struct nand_chip)); - - /* Link the private data with the MTD structure */ - tx4925ndfmc_mtd->priv = this; - - /* Set address of NAND IO lines */ - this->IO_ADDR_R = (void __iomem *)&(tx4925_ndfmcptr->dtr); - this->IO_ADDR_W = (void __iomem *)&(tx4925_ndfmcptr->dtr); - this->hwcontrol = tx4925ndfmc_hwcontrol; - this->enable_hwecc = tx4925ndfmc_enable_hwecc; - this->calculate_ecc = tx4925ndfmc_readecc; - this->correct_data = nand_correct_data; - this->eccmode = NAND_ECC_HW6_512; - this->dev_ready = tx4925ndfmc_device_ready; - /* 20 us command delay time */ - this->chip_delay = 20; - this->read_byte = tx4925ndfmc_nand_read_byte; - this->write_byte = tx4925ndfmc_nand_write_byte; - this->cmdfunc = tx4925ndfmc_nand_command; - this->write_buf = tx4925ndfmc_nand_write_buf; - this->read_buf = tx4925ndfmc_nand_read_buf; - this->verify_buf = tx4925ndfmc_nand_verify_buf; - - /* Scan to find existance of the device */ - if (nand_scan (tx4925ndfmc_mtd, 1)) { - err = -ENXIO; - goto out_ior; - } - - /* Register the partitions */ -#ifdef CONFIG_MTD_CMDLINE_PARTS - { - int mtd_parts_nb = 0; - struct mtd_partition *mtd_parts = 0; - mtd_parts_nb = parse_cmdline_partitions(tx4925ndfmc_mtd, &mtd_parts, "tx4925ndfmc"); - if (mtd_parts_nb > 0) - add_mtd_partitions(tx4925ndfmc_mtd, mtd_parts, mtd_parts_nb); - else - add_mtd_device(tx4925ndfmc_mtd); - } -#else /* ifdef CONFIG_MTD_CMDLINE_PARTS */ - switch(tx4925ndfmc_mtd->size){ - case 0x01000000: add_mtd_partitions(tx4925ndfmc_mtd, partition_info16k, NUM_PARTITIONS16K); break; - case 0x02000000: add_mtd_partitions(tx4925ndfmc_mtd, partition_info32k, NUM_PARTITIONS32K); break; - case 0x04000000: add_mtd_partitions(tx4925ndfmc_mtd, partition_info64k, NUM_PARTITIONS64K); break; - case 0x08000000: add_mtd_partitions(tx4925ndfmc_mtd, partition_info128k, NUM_PARTITIONS128K); break; - default: { - printk ("Unsupported SmartMedia device\n"); - err = -ENXIO; - goto out_ior; - } - } -#endif /* ifdef CONFIG_MTD_CMDLINE_PARTS */ - goto out; - -out_ior: -out: - return err; -} - -module_init(tx4925ndfmc_init); - -/* - * Clean up routine - */ -#ifdef MODULE -static void __exit tx4925ndfmc_cleanup (void) -{ - /* Release resources, unregister device */ - nand_release (tx4925ndfmc_mtd); - - /* Free the MTD device structure */ - kfree (tx4925ndfmc_mtd); -} -module_exit(tx4925ndfmc_cleanup); -#endif - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Alice Hennessy <ahennessy@mvista.com>"); -MODULE_DESCRIPTION("Glue layer for SmartMediaCard on Toshiba RBTX4925"); |