drivers/mtd/nand/autcpu12.c

   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)
   8  *
   9  * $Id: autcpu12.c,v 1.11 2003/06/04 17:04:09 gleixner Exp $
  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
  17  *   autronix autcpu12 board, which is a SmartMediaCard. It supports
  18  *   16MB, 32MB and 64MB 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/slab.h>
  31 #include <linux/init.h>
  32 #include <linux/module.h>
  33 #include <linux/mtd/mtd.h>
  34 #include <linux/mtd/nand.h>
  35 #include <linux/mtd/partitions.h>
  36 #include <asm/io.h>
  37 #include <asm/arch/hardware.h>
  38 #include <asm/sizes.h>
  39 #include <asm/arch/autcpu12.h>
  40
  41 /*
  42  * MTD structure for AUTCPU12 board
  43  */
  44 static struct mtd_info *autcpu12_mtd = NULL;
  45
  46 /*
  47  * Module stuff
  48  */
  49 #if LINUX_VERSION_CODE < 0x20212 && defined(MODULE)
  50 #define autcpu12_init init_module
  51 #define autcpu12_cleanup cleanup_module
  52 #endif
  53
  54 static int autcpu12_io_base = CS89712_VIRT_BASE;
  55 static int autcpu12_fio_pbase = AUTCPU12_PHYS_SMC;
  56 static int autcpu12_fio_ctrl = AUTCPU12_SMC_SELECT_OFFSET;
  57 static int autcpu12_pedr = AUTCPU12_SMC_PORT_OFFSET;
  58 static int autcpu12_fio_base;
  59
  60 #ifdef MODULE
  61 MODULE_PARM(autcpu12_fio_pbase, "i");
  62 MODULE_PARM(autcpu12_fio_ctrl, "i");
  63 MODULE_PARM(autcpu12_pedr, "i");
  64
  65 __setup("autcpu12_fio_pbase=",autcpu12_fio_pbase);
  66 __setup("autcpu12_fio_ctrl=",autcpu12_fio_ctrl);
  67 __setup("autcpu12_pedr=",autcpu12_pedr);
  68 #endif
  69
  70 /*
  71  * Define partitions for flash devices
  72  */
  73 extern struct nand_oobinfo jffs2_oobinfo;
  74
  75 static struct mtd_partition partition_info16k[] = {
  76         { name: "AUTCPU12 flash partition 1",
  77           offset:  0,
  78           size:    8 * SZ_1M },
  79         { name: "AUTCPU12 flash partition 2",
  80           offset:  8 * SZ_1M,
  81           size:    8 * SZ_1M },
  82 };
  83
  84 static struct mtd_partition partition_info32k[] = {
  85         { name: "AUTCPU12 flash partition 1",
  86           offset:  0,
  87           size:    8 * SZ_1M },
  88         { name: "AUTCPU12 flash partition 2",
  89           offset:  8 * SZ_1M,
  90           size:   24 * SZ_1M },
  91 };
  92
  93 static struct mtd_partition partition_info64k[] = {
  94         { name: "AUTCPU12 flash partition 1",
  95           offset:  0,
  96           size:   16 * SZ_1M },
  97         { name: "AUTCPU12 flash partition 2",
  98           offset: 16 * SZ_1M,
  99           size:   48 * SZ_1M },
 100 };
 101
 102 static struct mtd_partition partition_info128k[] = {
 103         { name: "AUTCPU12 flash partition 1",
 104           offset:  0,
 105           size:   16 * SZ_1M },
 106         { name: "AUTCPU12 flash partition 2",
 107           offset: 16 * SZ_1M,
 108           size:   112 * SZ_1M },
 109 };
 110
 111 #define NUM_PARTITIONS16K 2
 112 #define NUM_PARTITIONS32K 2
 113 #define NUM_PARTITIONS64K 2
 114 #define NUM_PARTITIONS128K 2
 115 /*
 116  *      hardware specific access to control-lines
 117 */
 118 void autcpu12_hwcontrol(int cmd)
 119 {
 120
 121         switch(cmd){
 122
 123                 case NAND_CTL_SETCLE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) |=  AUTCPU12_SMC_CLE; break;
 124                 case NAND_CTL_CLRCLE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) &= ~AUTCPU12_SMC_CLE; break;
 125
 126                 case NAND_CTL_SETALE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) |=  AUTCPU12_SMC_ALE; break;
 127                 case NAND_CTL_CLRALE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) &= ~AUTCPU12_SMC_ALE; break;
 128
 129                 case NAND_CTL_SETNCE: (*(volatile unsigned char *) (autcpu12_fio_base + autcpu12_fio_ctrl)) = 0x01; break;
 130                 case NAND_CTL_CLRNCE: (*(volatile unsigned char *) (autcpu12_fio_base + autcpu12_fio_ctrl)) = 0x00; break;
 131         }
 132 }
 133
 134 /*
 135 *       read device ready pin
 136 */
 137 int autcpu12_device_ready(void)
 138 {
 139
 140         return ( (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) & AUTCPU12_SMC_RDY) ? 1 : 0;
 141
 142 }
 143 /*
 144  * Main initialization routine
 145  */
 146 int __init autcpu12_init (void)
 147 {
 148         struct nand_chip *this;
 149         int err = 0;
 150
 151         /* Allocate memory for MTD device structure and private data */
 152         autcpu12_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct nand_chip),
 153                                 GFP_KERNEL);
 154         if (!autcpu12_mtd) {
 155                 printk ("Unable to allocate AUTCPU12 NAND MTD device structure.\n");
 156                 err = -ENOMEM;
 157                 goto out;
 158         }
 159
 160         /* map physical adress */
 161         autcpu12_fio_base=(unsigned long)ioremap(autcpu12_fio_pbase,SZ_1K);
 162         if(!autcpu12_fio_base){
 163                 printk("Ioremap autcpu12 SmartMedia Card failed\n");
 164                 err = -EIO;
 165                 goto out_mtd;
 166         }
 167
 168         /* Get pointer to private data */
 169         this = (struct nand_chip *) (&autcpu12_mtd[1]);
 170
 171         /* Initialize structures */
 172         memset((char *) autcpu12_mtd, 0, sizeof(struct mtd_info));
 173         memset((char *) this, 0, sizeof(struct nand_chip));
 174
 175         /* Link the private data with the MTD structure */
 176         autcpu12_mtd->priv = this;
 177
 178         /* Set address of NAND IO lines */
 179         this->IO_ADDR_R = autcpu12_fio_base;
 180         this->IO_ADDR_W = autcpu12_fio_base;
 181         this->hwcontrol = autcpu12_hwcontrol;
 182         this->dev_ready = autcpu12_device_ready;
 183         /* 20 us command delay time */
 184         this->chip_delay = 20;
 185         this->eccmode = NAND_ECC_SOFT;
 186
 187         /* Scan to find existance of the device */
 188         if (nand_scan (autcpu12_mtd)) {
 189                 err = -ENXIO;
 190                 goto out_ior;
 191         }
 192
 193         /* Allocate memory for internal data buffer */
 194         this->data_buf = kmalloc (sizeof(u_char) * (autcpu12_mtd->oobblock + autcpu12_mtd->oobsize), GFP_KERNEL);
 195         if (!this->data_buf) {
 196                 printk ("Unable to allocate NAND data buffer for AUTCPU12.\n");
 197                 err = -ENOMEM;
 198                 goto out_ior;
 199         }
 200
 201         /* Register the partitions */
 202         switch(autcpu12_mtd->size){
 203                 case SZ_16M: add_mtd_partitions(autcpu12_mtd, partition_info16k, NUM_PARTITIONS16K); break;
 204                 case SZ_32M: add_mtd_partitions(autcpu12_mtd, partition_info32k, NUM_PARTITIONS32K); break;
 205                 case SZ_64M: add_mtd_partitions(autcpu12_mtd, partition_info64k, NUM_PARTITIONS64K); break;
 206                 case SZ_128M: add_mtd_partitions(autcpu12_mtd, partition_info128k, NUM_PARTITIONS128K); break;
 207                 default: {
 208                         printk ("Unsupported SmartMedia device\n");
 209                         err = -ENXIO;
 210                         goto out_buf;
 211                 }
 212         }
 213         goto out;
 214
 215 out_buf:
 216         kfree (this->data_buf);
 217 out_ior:
 218         iounmap((void *)autcpu12_fio_base);
 219 out_mtd:
 220         kfree (autcpu12_mtd);
 221 out:
 222         return err;
 223 }
 224
 225 module_init(autcpu12_init);
 226
 227 /*
 228  * Clean up routine
 229  */
 230 #ifdef MODULE
 231 static void __exit autcpu12_cleanup (void)
 232 {
 233         struct nand_chip *this = (struct nand_chip *) &autcpu12_mtd[1];
 234
 235         /* Unregister partitions */
 236         del_mtd_partitions(autcpu12_mtd);
 237
 238         /* Unregister the device */
 239         del_mtd_device (autcpu12_mtd);
 240
 241         /* Free internal data buffers */
 242         kfree (this->data_buf);
 243
 244         /* unmap physical adress */
 245         iounmap((void *)autcpu12_fio_base);
 246
 247         /* Free the MTD device structure */
 248         kfree (autcpu12_mtd);
 249 }
 250 module_exit(autcpu12_cleanup);
 251 #endif
 252
 253 MODULE_LICENSE("GPL");
 254 MODULE_AUTHOR("Thomas Gleixner <tglx@linutronix.de>");
 255 MODULE_DESCRIPTION("Glue layer for SmartMediaCard on autronix autcpu12");