/* * drivers/mtd/autcpu12.c * * Copyright (c) 2002 Thomas Gleixner * * Derived from drivers/mtd/spia.c * Copyright (C) 2000 Steven J. Hill (sjhill@realitydiluted.com) * * $Id: autcpu12.c,v 1.23 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 * autronix autcpu12 board, which is a SmartMediaCard. It supports * 16MiB, 32MiB and 64MiB cards. * * * 02-12-2002 TG Cleanup of module params * * 02-20-2002 TG adjusted for different rd/wr adress support * added support for read device ready/busy line * added page_cache * * 10-06-2002 TG 128K card support added */ #include #include #include #include #include #include #include #include #include #include /* * MTD structure for AUTCPU12 board */ static struct mtd_info *autcpu12_mtd = NULL; static int autcpu12_io_base = CS89712_VIRT_BASE; static int autcpu12_fio_pbase = AUTCPU12_PHYS_SMC; static int autcpu12_fio_ctrl = AUTCPU12_SMC_SELECT_OFFSET; static int autcpu12_pedr = AUTCPU12_SMC_PORT_OFFSET; static void __iomem *autcpu12_fio_base; /* * Define partitions for flash devices */ static struct mtd_partition partition_info16k[] = { { .name = "AUTCPU12 flash partition 1", .offset = 0, .size = 8 * SZ_1M }, { .name = "AUTCPU12 flash partition 2", .offset = 8 * SZ_1M, .size = 8 * SZ_1M }, }; static struct mtd_partition partition_info32k[] = { { .name = "AUTCPU12 flash partition 1", .offset = 0, .size = 8 * SZ_1M }, { .name = "AUTCPU12 flash partition 2", .offset = 8 * SZ_1M, .size = 24 * SZ_1M }, }; static struct mtd_partition partition_info64k[] = { { .name = "AUTCPU12 flash partition 1", .offset = 0, .size = 16 * SZ_1M }, { .name = "AUTCPU12 flash partition 2", .offset = 16 * SZ_1M, .size = 48 * SZ_1M }, }; static struct mtd_partition partition_info128k[] = { { .name = "AUTCPU12 flash partition 1", .offset = 0, .size = 16 * SZ_1M }, { .name = "AUTCPU12 flash partition 2", .offset = 16 * SZ_1M, .size = 112 * SZ_1M }, }; #define NUM_PARTITIONS16K 2 #define NUM_PARTITIONS32K 2 #define NUM_PARTITIONS64K 2 #define NUM_PARTITIONS128K 2 /* * hardware specific access to control-lines */ static void autcpu12_hwcontrol(struct mtd_info *mtd, int cmd) { switch (cmd) { case NAND_CTL_SETCLE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) |= AUTCPU12_SMC_CLE; break; case NAND_CTL_CLRCLE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) &= ~AUTCPU12_SMC_CLE; break; case NAND_CTL_SETALE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) |= AUTCPU12_SMC_ALE; break; case NAND_CTL_CLRALE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) &= ~AUTCPU12_SMC_ALE; break; case NAND_CTL_SETNCE: (*(volatile unsigned char *) (autcpu12_fio_base + autcpu12_fio_ctrl)) = 0x01; break; case NAND_CTL_CLRNCE: (*(volatile unsigned char *) (autcpu12_fio_base + autcpu12_fio_ctrl)) = 0x00; break; } } /* * read device ready pin */ int autcpu12_device_ready(struct mtd_info *mtd) { return ((*(volatile unsigned char *)(autcpu12_io_base + autcpu12_pedr)) & AUTCPU12_SMC_RDY) ? 1 : 0; } /* * Main initialization routine */ int __init autcpu12_init(void) { struct nand_chip *this; int err = 0; /* Allocate memory for MTD device structure and private data */ autcpu12_mtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip), GFP_KERNEL); if (!autcpu12_mtd) { printk("Unable to allocate AUTCPU12 NAND MTD device structure.\n"); err = -ENOMEM; goto out; } /* map physical adress */ autcpu12_fio_base = ioremap(autcpu12_fio_pbase, SZ_1K); if (!autcpu12_fio_base) { printk("Ioremap autcpu12 SmartMedia Card failed\n"); err = -EIO; goto out_mtd; } /* Get pointer to private data */ this = (struct nand_chip *)(&autcpu12_mtd[1]); /* Initialize structures */ memset(autcpu12_mtd, 0, sizeof(struct mtd_info)); memset(this, 0, sizeof(struct nand_chip)); /* Link the private data with the MTD structure */ autcpu12_mtd->priv = this; autcpu12_mtd->owner = THIS_MODULE; /* Set address of NAND IO lines */ this->IO_ADDR_R = autcpu12_fio_base; this->IO_ADDR_W = autcpu12_fio_base; this->hwcontrol = autcpu12_hwcontrol; this->dev_ready = autcpu12_device_ready; /* 20 us command delay time */ this->chip_delay = 20; this->eccmode = NAND_ECC_SOFT; /* Enable the following for a flash based bad block table */ /* this->options = NAND_USE_FLASH_BBT; */ this->options = NAND_USE_FLASH_BBT; /* Scan to find existance of the device */ if (nand_scan(autcpu12_mtd, 1)) { err = -ENXIO; goto out_ior; } /* Register the partitions */ switch (autcpu12_mtd->size) { case SZ_16M: add_mtd_partitions(autcpu12_mtd, partition_info16k, NUM_PARTITIONS16K); break; case SZ_32M: add_mtd_partitions(autcpu12_mtd, partition_info32k, NUM_PARTITIONS32K); break; case SZ_64M: add_mtd_partitions(autcpu12_mtd, partition_info64k, NUM_PARTITIONS64K); break; case SZ_128M: add_mtd_partitions(autcpu12_mtd, partition_info128k, NUM_PARTITIONS128K); break; default: printk("Unsupported SmartMedia device\n"); err = -ENXIO; goto out_ior; } goto out; out_ior: iounmap((void *)autcpu12_fio_base); out_mtd: kfree(autcpu12_mtd); out: return err; } module_init(autcpu12_init); /* * Clean up routine */ #ifdef MODULE static void __exit autcpu12_cleanup(void) { /* Release resources, unregister device */ nand_release(autcpu12_mtd); /* unmap physical adress */ iounmap((void *)autcpu12_fio_base); /* Free the MTD device structure */ kfree(autcpu12_mtd); } module_exit(autcpu12_cleanup); #endif MODULE_LICENSE("GPL"); MODULE_AUTHOR("Thomas Gleixner "); MODULE_DESCRIPTION("Glue layer for SmartMediaCard on autronix autcpu12");