/* * drivers/mtd/nand/h1910.c * * Copyright (C) 2003 Joshua Wise (joshua@joshuawise.com) * * Derived from drivers/mtd/nand/edb7312.c * Copyright (C) 2002 Marius Gröger (mag@sysgo.de) * Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de) * * $Id: h1910.c,v 1.6 2005/11/07 11:14:30 gleixner 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 * iPAQ h1910 board which utilizes the Samsung K9F2808 part. This is * a 128Mibit (16MiB x 8 bits) NAND flash device. */ #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 <asm/io.h> #include <asm/arch/hardware.h> /* for CLPS7111_VIRT_BASE */ #include <asm/sizes.h> #include <asm/arch/h1900-gpio.h> #include <asm/arch/ipaq.h> /* * MTD structure for EDB7312 board */ static struct mtd_info *h1910_nand_mtd = NULL; /* * Module stuff */ #ifdef CONFIG_MTD_PARTITIONS /* * Define static partitions for flash device */ static struct mtd_partition partition_info[] = { {name:"h1910 NAND Flash", offset:0, size:16 * 1024 * 1024} }; #define NUM_PARTITIONS 1 #endif /* * hardware specific access to control-lines * * NAND_NCE: bit 0 - don't care * NAND_CLE: bit 1 - address bit 2 * NAND_ALE: bit 2 - address bit 3 */ static void h1910_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl) { struct nand_chip *chip = mtd->priv; if (cmd != NAND_CMD_NONE) writeb(cmd, chip->IO_ADDR_W | ((ctrl & 0x6) << 1)); } /* * read device ready pin */ #if 0 static int h1910_device_ready(struct mtd_info *mtd) { return (GPLR(55) & GPIO_bit(55)); } #endif /* * Main initialization routine */ static int __init h1910_init(void) { struct nand_chip *this; const char *part_type = 0; int mtd_parts_nb = 0; struct mtd_partition *mtd_parts = 0; void __iomem *nandaddr; if (!machine_is_h1900()) return -ENODEV; nandaddr = ioremap(0x08000000, 0x1000); if (!nandaddr) { printk("Failed to ioremap nand flash.\n"); return -ENOMEM; } /* Allocate memory for MTD device structure and private data */ h1910_nand_mtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip), GFP_KERNEL); if (!h1910_nand_mtd) { printk("Unable to allocate h1910 NAND MTD device structure.\n"); iounmap((void *)nandaddr); return -ENOMEM; } /* Get pointer to private data */ this = (struct nand_chip *)(&h1910_nand_mtd[1]); /* Initialize structures */ memset(h1910_nand_mtd, 0, sizeof(struct mtd_info)); memset(this, 0, sizeof(struct nand_chip)); /* Link the private data with the MTD structure */ h1910_nand_mtd->priv = this; h1910_nand_mtd->owner = THIS_MODULE; /* * Enable VPEN */ GPSR(37) = GPIO_bit(37); /* insert callbacks */ this->IO_ADDR_R = nandaddr; this->IO_ADDR_W = nandaddr; this->cmd_ctrl = h1910_hwcontrol; this->dev_ready = NULL; /* unknown whether that was correct or not so we will just do it like this */ /* 15 us command delay time */ this->chip_delay = 50; this->ecc.mode = NAND_ECC_SOFT; this->options = NAND_NO_AUTOINCR; /* Scan to find existence of the device */ if (nand_scan(h1910_nand_mtd, 1)) { printk(KERN_NOTICE "No NAND device - returning -ENXIO\n"); kfree(h1910_nand_mtd); iounmap((void *)nandaddr); return -ENXIO; } #ifdef CONFIG_MTD_CMDLINE_PARTS mtd_parts_nb = parse_cmdline_partitions(h1910_nand_mtd, &mtd_parts, "h1910-nand"); if (mtd_parts_nb > 0) part_type = "command line"; else mtd_parts_nb = 0; #endif if (mtd_parts_nb == 0) { mtd_parts = partition_info; mtd_parts_nb = NUM_PARTITIONS; part_type = "static"; } /* Register the partitions */ printk(KERN_NOTICE "Using %s partition definition\n", part_type); add_mtd_partitions(h1910_nand_mtd, mtd_parts, mtd_parts_nb); /* Return happy */ return 0; } module_init(h1910_init); /* * Clean up routine */ static void __exit h1910_cleanup(void) { struct nand_chip *this = (struct nand_chip *)&h1910_nand_mtd[1]; /* Release resources, unregister device */ nand_release(h1910_nand_mtd); /* Release io resource */ iounmap((void *)this->IO_ADDR_W); /* Free the MTD device structure */ kfree(h1910_nand_mtd); } module_exit(h1910_cleanup); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Joshua Wise <joshua at joshuawise dot com>"); MODULE_DESCRIPTION("NAND flash driver for iPAQ h1910");