diff options
| -rw-r--r-- | drivers/mtd/nand/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/mtd/nand/Makefile | 1 | ||||
| -rw-r--r-- | drivers/mtd/nand/ts7250.c | 208 |
3 files changed, 215 insertions, 0 deletions
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig index cfe288a6e85..b735ab61c1e 100644 --- a/drivers/mtd/nand/Kconfig +++ b/drivers/mtd/nand/Kconfig @@ -55,6 +55,12 @@ config MTD_NAND_TOTO help Support for NAND flash on Texas Instruments Toto platform. +config MTD_NAND_TS7250 + tristate "NAND Flash device on TS-7250 board" + depends on MACH_TS72XX && MTD_NAND + help + Support for NAND flash on Technologic Systems TS-7250 platform. + config MTD_NAND_IDS tristate diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile index 41742026a52..073705bc8c2 100644 --- a/drivers/mtd/nand/Makefile +++ b/drivers/mtd/nand/Makefile @@ -17,6 +17,7 @@ obj-$(CONFIG_MTD_NAND_DISKONCHIP) += diskonchip.o obj-$(CONFIG_MTD_NAND_H1900) += h1910.o obj-$(CONFIG_MTD_NAND_RTC_FROM4) += rtc_from4.o obj-$(CONFIG_MTD_NAND_SHARPSL) += sharpsl.o +obj-$(CONFIG_MTD_NAND_TS7250) += ts7250.o obj-$(CONFIG_MTD_NAND_NANDSIM) += nandsim.o nand-objs = nand_base.o nand_bbt.o diff --git a/drivers/mtd/nand/ts7250.c b/drivers/mtd/nand/ts7250.c new file mode 100644 index 00000000000..643633d91a8 --- /dev/null +++ b/drivers/mtd/nand/ts7250.c @@ -0,0 +1,208 @@ +/* + * drivers/mtd/nand/ts7250.c + * + * Copyright (C) 2004 Technologic Systems (support@embeddedARM.com) + * + * Derived from drivers/mtd/nand/edb7312.c + * Copyright (C) 2004 Marius Gröger (mag@sysgo.de) + * + * Derived from drivers/mtd/nand/autcpu12.c + * Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de) + * + * $Id: ts7250.c,v 1.4 2004/12/30 22:02:07 joff Exp $ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * Overview: + * This is a device driver for the NAND flash device found on the + * TS-7250 board which utilizes a Samsung 32 Mbyte part. + */ + +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/nand.h> +#include <linux/mtd/partitions.h> +#include <asm/io.h> +#include <asm/arch/hardware.h> +#include <asm/sizes.h> +#include <asm/mach-types.h> + +/* + * MTD structure for TS7250 board + */ +static struct mtd_info *ts7250_mtd = NULL; + +#ifdef CONFIG_MTD_PARTITIONS +static const char *part_probes[] = { "cmdlinepart", NULL }; + +#define NUM_PARTITIONS 3 + +/* + * Define static partitions for flash device + */ +static struct mtd_partition partition_info32[] = { + { + .name = "TS-BOOTROM", + .offset = 0x00000000, + .size = 0x00004000, + }, { + .name = "Linux", + .offset = 0x00004000, + .size = 0x01d00000, + }, { + .name = "RedBoot", + .offset = 0x01d04000, + .size = 0x002fc000, + }, +}; + +/* + * Define static partitions for flash device + */ +static struct mtd_partition partition_info128[] = { + { + .name = "TS-BOOTROM", + .offset = 0x00000000, + .size = 0x00004000, + }, { + .name = "Linux", + .offset = 0x00004000, + .size = 0x07d00000, + }, { + .name = "RedBoot", + .offset = 0x07d04000, + .size = 0x002fc000, + }, +}; +#endif + + +/* + * hardware specific access to control-lines + */ +static void ts7250_hwcontrol(struct mtd_info *mtd, int cmd) +{ + unsigned long ctrl = TS72XX_NAND_CONTROL_VIRT_BASE; + + switch(cmd) { + case NAND_CTL_SETCLE: + __raw_writeb(__raw_readb(ctrl) | 0x2, ctrl); + break; + case NAND_CTL_CLRCLE: + __raw_writeb(__raw_readb(ctrl) & ~0x2, ctrl); + break; + case NAND_CTL_SETALE: + __raw_writeb(__raw_readb(ctrl) | 0x1, ctrl); + break; + case NAND_CTL_CLRALE: + __raw_writeb(__raw_readb(ctrl) & ~0x1, ctrl); + break; + case NAND_CTL_SETNCE: + __raw_writeb(__raw_readb(ctrl) | 0x4, ctrl); + break; + case NAND_CTL_CLRNCE: + __raw_writeb(__raw_readb(ctrl) & ~0x4, ctrl); + break; + } +} + +/* + * read device ready pin + */ +static int ts7250_device_ready(struct mtd_info *mtd) +{ + return __raw_readb(TS72XX_NAND_BUSY_VIRT_BASE) & 0x20; +} + +/* + * Main initialization routine + */ +static int __init ts7250_init(void) +{ + struct nand_chip *this; + const char *part_type = 0; + int mtd_parts_nb = 0; + struct mtd_partition *mtd_parts = 0; + + if (!machine_is_ts72xx() || board_is_ts7200()) + return -ENXIO; + + /* Allocate memory for MTD device structure and private data */ + ts7250_mtd = kmalloc(sizeof(struct mtd_info) + + sizeof(struct nand_chip), GFP_KERNEL); + if (!ts7250_mtd) { + printk("Unable to allocate TS7250 NAND MTD device structure.\n"); + return -ENOMEM; + } + + /* Get pointer to private data */ + this = (struct nand_chip *)(&ts7250_mtd[1]); + + /* Initialize structures */ + memset(ts7250_mtd, 0, sizeof(struct mtd_info)); + memset(this, 0, sizeof(struct nand_chip)); + + /* Link the private data with the MTD structure */ + ts7250_mtd->priv = this; + + /* insert callbacks */ + this->IO_ADDR_R = (void *)TS72XX_NAND_DATA_VIRT_BASE; + this->IO_ADDR_W = (void *)TS72XX_NAND_DATA_VIRT_BASE; + this->hwcontrol = ts7250_hwcontrol; + this->dev_ready = ts7250_device_ready; + this->chip_delay = 15; + this->eccmode = NAND_ECC_SOFT; + + printk("Searching for NAND flash...\n"); + /* Scan to find existence of the device */ + if (nand_scan(ts7250_mtd, 1)) { + kfree(ts7250_mtd); + return -ENXIO; + } + +#ifdef CONFIG_MTD_PARTITIONS + ts7250_mtd->name = "ts7250-nand"; + mtd_parts_nb = parse_mtd_partitions(ts7250_mtd, part_probes, + &mtd_parts, 0); + if (mtd_parts_nb > 0) + part_type = "command line"; + else + mtd_parts_nb = 0; +#endif + if (mtd_parts_nb == 0) { + mtd_parts = partition_info32; + if (ts7250_mtd->size >= (128 * 0x100000)) + mtd_parts = partition_info128; + mtd_parts_nb = NUM_PARTITIONS; + part_type = "static"; + } + + /* Register the partitions */ + printk(KERN_NOTICE "Using %s partition definition\n", part_type); + add_mtd_partitions(ts7250_mtd, mtd_parts, mtd_parts_nb); + + /* Return happy */ + return 0; +} +module_init(ts7250_init); + +/* + * Clean up routine + */ +static void __exit ts7250_cleanup(void) +{ + /* Unregister the device */ + del_mtd_device(ts7250_mtd); + + /* Free the MTD device structure */ + kfree(ts7250_mtd); +} +module_exit(ts7250_cleanup); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Jesse Off <joff@embeddedARM.com>"); +MODULE_DESCRIPTION("MTD map driver for Technologic Systems TS-7250 board"); |