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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 | /* * drivers/mtd/nand/spia.c * * Copyright (C) 2000 Steven J. Hill (sjhill@cotw.com) * * $Id: spia.c,v 1.12 2001/10/02 15:05:14 dwmw2 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 * SPIA board which utilizes the Toshiba TC58V64AFT part. This is * a 64Mibit (8MiB x 8 bits) NAND flash device. */ #include <linux/slab.h> #include <linux/module.h> #include <linux/mtd/mtd.h> #include <linux/mtd/nand.h> #include <linux/mtd/partitions.h> #include <asm/io.h> /* * MTD structure for SPIA board */ static struct mtd_info *spia_mtd = NULL; /* * Values specific to the SPIA board (used with EP7212 processor) */ #define SPIA_IO_ADDR = 0xd0000000 /* Start of EP7212 IO address space */ #define SPIA_FIO_ADDR = 0xf0000000 /* Address where flash is mapped */ #define SPIA_PEDR = 0x0080 /* * IO offset to Port E data register * where the CLE, ALE and NCE pins * are wired to. */ #define SPIA_PEDDR = 0x00c0 /* * IO offset to Port E data direction * register so we can control the IO * lines. */ /* * Module stuff */ static int spia_io_base = SPIA_IO_BASE; static int spia_fio_base = SPIA_FIO_BASE; static int spia_pedr = SPIA_PEDR; static int spia_peddr = SPIA_PEDDR; MODULE_PARM(spia_io_base, "i"); MODULE_PARM(spia_fio_base, "i"); MODULE_PARM(spia_pedr, "i"); MODULE_PARM(spia_peddr, "i"); __setup("spia_io_base=",spia_io_base); __setup("spia_fio_base=",spia_fio_base); __setup("spia_pedr=",spia_pedr); __setup("spia_peddr=",spia_peddr); /* * Define partitions for flash device */ const static struct mtd_partition partition_info[] = { { name: "SPIA flash partition 1", offset: 0, size: 2*1024*1024 }, { name: "SPIA flash partition 2", offset: 2*1024*1024, size: 6*1024*1024 } }; #define NUM_PARTITIONS 2 /* * Main initialization routine */ int __init spia_init (void) { struct nand_chip *this; /* Allocate memory for MTD device structure and private data */ spia_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct nand_chip), GFP_KERNEL); if (!spia_mtd) { printk ("Unable to allocate SPIA NAND MTD device structure.\n"); return -ENOMEM; } /* Get pointer to private data */ this = (struct nand_chip *) (&spia_mtd[1]); /* Initialize structures */ memset((char *) spia_mtd, 0, sizeof(struct mtd_info)); memset((char *) this, 0, sizeof(struct nand_chip)); /* Link the private data with the MTD structure */ spia_mtd->priv = this; /* * Set GPIO Port E control register so that the pins are configured * to be outputs for controlling the NAND flash. */ (*(volatile unsigned char *) (spia_io_base + spia_peddr)) = 0x07; /* Set address of NAND IO lines */ this->IO_ADDR = spia_fio_base; this->CTRL_ADDR = spia_io_base + spia_pedr; this->CLE = 0x01; this->ALE = 0x02; this->NCE = 0x04; /* Scan to find existance of the device */ if (nand_scan (spia_mtd)) { kfree (spia_mtd); return -ENXIO; } /* Allocate memory for internal data buffer */ this->data_buf = kmalloc (sizeof(u_char) * (spia_mtd->oobblock + spia_mtd->oobsize), GFP_KERNEL); if (!this->data_buf) { printk ("Unable to allocate NAND data buffer for SPIA.\n"); kfree (spia_mtd); return -ENOMEM; } /* Register the partitions */ add_mtd_partitions(spia_mtd, partition_info, NUM_PARTITIONS); /* Return happy */ return 0; } module_init(spia_init); /* * Clean up routine */ #ifdef MODULE static void __exit spia_cleanup (void) { struct nand_chip *this = (struct nand_chip *) &spia_mtd[1]; /* Unregister the device */ del_mtd_device (spia_mtd); /* Free internal data buffer */ kfree (this->data_buf); /* Free the MTD device structure */ kfree (spia_mtd); } module_exit(spia_cleanup); #endif MODULE_LICENSE("GPL"); MODULE_AUTHOR("Steven J. Hill <sjhill@cotw.com"); MODULE_DESCRIPTION("Board-specific glue layer for NAND flash on SPIA board"); |