Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * drivers/mtd/autcpu12.c |
| 3 | * |
| 4 | * Copyright (c) 2002 Thomas Gleixner <tgxl@linutronix.de> |
| 5 | * |
| 6 | * Derived from drivers/mtd/spia.c |
| 7 | * Copyright (C) 2000 Steven J. Hill (sjhill@realitydiluted.com) |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame^] | 8 | * |
| 9 | * $Id: autcpu12.c,v 1.23 2005/11/07 11:14:30 gleixner Exp $ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License version 2 as |
| 13 | * published by the Free Software Foundation. |
| 14 | * |
| 15 | * Overview: |
| 16 | * This is a device driver for the NAND flash device found on the |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame^] | 17 | * autronix autcpu12 board, which is a SmartMediaCard. It supports |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | * 16MiB, 32MiB and 64MiB cards. |
| 19 | * |
| 20 | * |
| 21 | * 02-12-2002 TG Cleanup of module params |
| 22 | * |
| 23 | * 02-20-2002 TG adjusted for different rd/wr adress support |
| 24 | * added support for read device ready/busy line |
| 25 | * added page_cache |
| 26 | * |
| 27 | * 10-06-2002 TG 128K card support added |
| 28 | */ |
| 29 | |
| 30 | #include <linux/version.h> |
| 31 | #include <linux/slab.h> |
| 32 | #include <linux/init.h> |
| 33 | #include <linux/module.h> |
| 34 | #include <linux/mtd/mtd.h> |
| 35 | #include <linux/mtd/nand.h> |
| 36 | #include <linux/mtd/partitions.h> |
| 37 | #include <asm/io.h> |
| 38 | #include <asm/arch/hardware.h> |
| 39 | #include <asm/sizes.h> |
| 40 | #include <asm/arch/autcpu12.h> |
| 41 | |
| 42 | /* |
| 43 | * MTD structure for AUTCPU12 board |
| 44 | */ |
| 45 | static struct mtd_info *autcpu12_mtd = NULL; |
| 46 | |
| 47 | static int autcpu12_io_base = CS89712_VIRT_BASE; |
| 48 | static int autcpu12_fio_pbase = AUTCPU12_PHYS_SMC; |
| 49 | static int autcpu12_fio_ctrl = AUTCPU12_SMC_SELECT_OFFSET; |
| 50 | static int autcpu12_pedr = AUTCPU12_SMC_PORT_OFFSET; |
| 51 | static void __iomem * autcpu12_fio_base; |
| 52 | |
| 53 | /* |
| 54 | * Define partitions for flash devices |
| 55 | */ |
| 56 | static struct mtd_partition partition_info16k[] = { |
| 57 | { .name = "AUTCPU12 flash partition 1", |
| 58 | .offset = 0, |
| 59 | .size = 8 * SZ_1M }, |
| 60 | { .name = "AUTCPU12 flash partition 2", |
| 61 | .offset = 8 * SZ_1M, |
| 62 | .size = 8 * SZ_1M }, |
| 63 | }; |
| 64 | |
| 65 | static struct mtd_partition partition_info32k[] = { |
| 66 | { .name = "AUTCPU12 flash partition 1", |
| 67 | .offset = 0, |
| 68 | .size = 8 * SZ_1M }, |
| 69 | { .name = "AUTCPU12 flash partition 2", |
| 70 | .offset = 8 * SZ_1M, |
| 71 | .size = 24 * SZ_1M }, |
| 72 | }; |
| 73 | |
| 74 | static struct mtd_partition partition_info64k[] = { |
| 75 | { .name = "AUTCPU12 flash partition 1", |
| 76 | .offset = 0, |
| 77 | .size = 16 * SZ_1M }, |
| 78 | { .name = "AUTCPU12 flash partition 2", |
| 79 | .offset = 16 * SZ_1M, |
| 80 | .size = 48 * SZ_1M }, |
| 81 | }; |
| 82 | |
| 83 | static struct mtd_partition partition_info128k[] = { |
| 84 | { .name = "AUTCPU12 flash partition 1", |
| 85 | .offset = 0, |
| 86 | .size = 16 * SZ_1M }, |
| 87 | { .name = "AUTCPU12 flash partition 2", |
| 88 | .offset = 16 * SZ_1M, |
| 89 | .size = 112 * SZ_1M }, |
| 90 | }; |
| 91 | |
| 92 | #define NUM_PARTITIONS16K 2 |
| 93 | #define NUM_PARTITIONS32K 2 |
| 94 | #define NUM_PARTITIONS64K 2 |
| 95 | #define NUM_PARTITIONS128K 2 |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame^] | 96 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | * hardware specific access to control-lines |
| 98 | */ |
| 99 | static void autcpu12_hwcontrol(struct mtd_info *mtd, int cmd) |
| 100 | { |
| 101 | |
| 102 | switch(cmd){ |
| 103 | |
| 104 | case NAND_CTL_SETCLE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) |= AUTCPU12_SMC_CLE; break; |
| 105 | case NAND_CTL_CLRCLE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) &= ~AUTCPU12_SMC_CLE; break; |
| 106 | |
| 107 | case NAND_CTL_SETALE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) |= AUTCPU12_SMC_ALE; break; |
| 108 | case NAND_CTL_CLRALE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) &= ~AUTCPU12_SMC_ALE; break; |
| 109 | |
| 110 | case NAND_CTL_SETNCE: (*(volatile unsigned char *) (autcpu12_fio_base + autcpu12_fio_ctrl)) = 0x01; break; |
| 111 | case NAND_CTL_CLRNCE: (*(volatile unsigned char *) (autcpu12_fio_base + autcpu12_fio_ctrl)) = 0x00; break; |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | /* |
| 116 | * read device ready pin |
| 117 | */ |
| 118 | int autcpu12_device_ready(struct mtd_info *mtd) |
| 119 | { |
| 120 | |
| 121 | return ( (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) & AUTCPU12_SMC_RDY) ? 1 : 0; |
| 122 | |
| 123 | } |
| 124 | |
| 125 | /* |
| 126 | * Main initialization routine |
| 127 | */ |
| 128 | int __init autcpu12_init (void) |
| 129 | { |
| 130 | struct nand_chip *this; |
| 131 | int err = 0; |
| 132 | |
| 133 | /* Allocate memory for MTD device structure and private data */ |
| 134 | autcpu12_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct nand_chip), |
| 135 | GFP_KERNEL); |
| 136 | if (!autcpu12_mtd) { |
| 137 | printk ("Unable to allocate AUTCPU12 NAND MTD device structure.\n"); |
| 138 | err = -ENOMEM; |
| 139 | goto out; |
| 140 | } |
| 141 | |
| 142 | /* map physical adress */ |
| 143 | autcpu12_fio_base = ioremap(autcpu12_fio_pbase,SZ_1K); |
| 144 | if(!autcpu12_fio_base){ |
| 145 | printk("Ioremap autcpu12 SmartMedia Card failed\n"); |
| 146 | err = -EIO; |
| 147 | goto out_mtd; |
| 148 | } |
| 149 | |
| 150 | /* Get pointer to private data */ |
| 151 | this = (struct nand_chip *) (&autcpu12_mtd[1]); |
| 152 | |
| 153 | /* Initialize structures */ |
| 154 | memset((char *) autcpu12_mtd, 0, sizeof(struct mtd_info)); |
| 155 | memset((char *) this, 0, sizeof(struct nand_chip)); |
| 156 | |
| 157 | /* Link the private data with the MTD structure */ |
| 158 | autcpu12_mtd->priv = this; |
| 159 | |
| 160 | /* Set address of NAND IO lines */ |
| 161 | this->IO_ADDR_R = autcpu12_fio_base; |
| 162 | this->IO_ADDR_W = autcpu12_fio_base; |
| 163 | this->hwcontrol = autcpu12_hwcontrol; |
| 164 | this->dev_ready = autcpu12_device_ready; |
| 165 | /* 20 us command delay time */ |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame^] | 166 | this->chip_delay = 20; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | this->eccmode = NAND_ECC_SOFT; |
| 168 | |
| 169 | /* Enable the following for a flash based bad block table */ |
| 170 | /* |
| 171 | this->options = NAND_USE_FLASH_BBT; |
| 172 | */ |
| 173 | this->options = NAND_USE_FLASH_BBT; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame^] | 174 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | /* Scan to find existance of the device */ |
| 176 | if (nand_scan (autcpu12_mtd, 1)) { |
| 177 | err = -ENXIO; |
| 178 | goto out_ior; |
| 179 | } |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame^] | 180 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | /* Register the partitions */ |
| 182 | switch(autcpu12_mtd->size){ |
| 183 | case SZ_16M: add_mtd_partitions(autcpu12_mtd, partition_info16k, NUM_PARTITIONS16K); break; |
| 184 | case SZ_32M: add_mtd_partitions(autcpu12_mtd, partition_info32k, NUM_PARTITIONS32K); break; |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame^] | 185 | case SZ_64M: add_mtd_partitions(autcpu12_mtd, partition_info64k, NUM_PARTITIONS64K); break; |
| 186 | case SZ_128M: add_mtd_partitions(autcpu12_mtd, partition_info128k, NUM_PARTITIONS128K); break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | default: { |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame^] | 188 | printk ("Unsupported SmartMedia device\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | err = -ENXIO; |
| 190 | goto out_ior; |
| 191 | } |
| 192 | } |
| 193 | goto out; |
| 194 | |
| 195 | out_ior: |
| 196 | iounmap((void *)autcpu12_fio_base); |
| 197 | out_mtd: |
| 198 | kfree (autcpu12_mtd); |
| 199 | out: |
| 200 | return err; |
| 201 | } |
| 202 | |
| 203 | module_init(autcpu12_init); |
| 204 | |
| 205 | /* |
| 206 | * Clean up routine |
| 207 | */ |
| 208 | #ifdef MODULE |
| 209 | static void __exit autcpu12_cleanup (void) |
| 210 | { |
| 211 | /* Release resources, unregister device */ |
| 212 | nand_release (autcpu12_mtd); |
| 213 | |
| 214 | /* unmap physical adress */ |
| 215 | iounmap((void *)autcpu12_fio_base); |
Thomas Gleixner | 61b03bd | 2005-11-07 11:15:49 +0000 | [diff] [blame^] | 216 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | /* Free the MTD device structure */ |
| 218 | kfree (autcpu12_mtd); |
| 219 | } |
| 220 | module_exit(autcpu12_cleanup); |
| 221 | #endif |
| 222 | |
| 223 | MODULE_LICENSE("GPL"); |
| 224 | MODULE_AUTHOR("Thomas Gleixner <tglx@linutronix.de>"); |
| 225 | MODULE_DESCRIPTION("Glue layer for SmartMediaCard on autronix autcpu12"); |