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@cotw.com)
   8  *
   9  * $Id: autcpu12.c,v 1.6 2002/11/11 15:47:56 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
  31 #include <linux/slab.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
  74 static struct mtd_partition partition_info16k[] = {
  75         { name: "AUTCPU12 flash partition 1",
  76           offset:  0,
  77           size:    8 * SZ_1M },
  78         { name: "AUTCPU12 flash partition 2",
  79           offset:  8 * SZ_1M,
  80           size:    8 * SZ_1M },
  81 };
  82
  83 static struct mtd_partition partition_info32k[] = {
  84         { name: "AUTCPU12 flash partition 1",
  85           offset:  0,
  86           size:    8 * SZ_1M },
  87         { name: "AUTCPU12 flash partition 2",
  88           offset:  8 * SZ_1M,
  89           size:   24 * SZ_1M },
  90 };
  91
  92 static struct mtd_partition partition_info64k[] = {
  93         { name: "AUTCPU12 flash partition 1",
  94           offset:  0,
  95           size:   16 * SZ_1M },
  96         { name: "AUTCPU12 flash partition 2",
  97           offset: 16 * SZ_1M,
  98           size:   48 * SZ_1M},
  99 };
 100
 101 static struct mtd_partition partition_info128k[] = {
 102         { name: "AUTCPU12 flash partition 1",
 103           offset:  0,
 104           size:   16 * SZ_1M },
 105         { name: "AUTCPU12 flash partition 2",
 106           offset: 16 * SZ_1M,
 107           size:   112 * SZ_1M},
 108 };
 109
 110 #define NUM_PARTITIONS16K 2
 111 #define NUM_PARTITIONS32K 2
 112 #define NUM_PARTITIONS64K 2
 113 #define NUM_PARTITIONS128K 2
 114 /*
 115  *      hardware specific access to control-lines
 116 */
 117 void autcpu12_hwcontrol(int cmd)
 118 {
 119
 120         switch(cmd){
 121
 122                 case NAND_CTL_SETCLE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) |=  AUTCPU12_SMC_CLE; break;
 123                 case NAND_CTL_CLRCLE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) &= ~AUTCPU12_SMC_CLE; break;
 124
 125                 case NAND_CTL_SETALE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) |=  AUTCPU12_SMC_ALE; break;
 126                 case NAND_CTL_CLRALE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) &= ~AUTCPU12_SMC_ALE; break;
 127
 128                 case NAND_CTL_SETNCE: (*(volatile unsigned char *) (autcpu12_fio_base + autcpu12_fio_ctrl)) = 0x01; break;
 129                 case NAND_CTL_CLRNCE: (*(volatile unsigned char *) (autcpu12_fio_base + autcpu12_fio_ctrl)) = 0x00; break;
 130         }
 131 }
 132
 133 /*
 134 *       read device ready pin
 135 */
 136 int autcpu12_device_ready(void)
 137 {
 138
 139         return ( (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) & AUTCPU12_SMC_RDY) ? 1 : 0;
 140
 141 }
 142 /*
 143  * Main initialization routine
 144  */
 145 int __init autcpu12_init (void)
 146 {
 147         struct nand_chip *this;
 148         int err = 0;
 149
 150         /* Allocate memory for MTD device structure and private data */
 151         autcpu12_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct nand_chip),
 152                                 GFP_KERNEL);
 153         if (!autcpu12_mtd) {
 154                 printk ("Unable to allocate AUTCPU12 NAND MTD device structure.\n");
 155                 err = -ENOMEM;
 156                 goto out;
 157         }
 158
 159         /* map physical adress */
 160         autcpu12_fio_base=(unsigned long)ioremap(autcpu12_fio_pbase,SZ_1K);
 161         if(!autcpu12_fio_base){
 162                 printk("Ioremap autcpu12 SmartMedia Card failed\n");
 163                 err = -EIO;
 164                 goto out_mtd;
 165         }
 166
 167         /* Get pointer to private data */
 168         this = (struct nand_chip *) (&autcpu12_mtd[1]);
 169
 170         /* Initialize structures */
 171         memset((char *) autcpu12_mtd, 0, sizeof(struct mtd_info));
 172         memset((char *) this, 0, sizeof(struct nand_chip));
 173
 174         /* Link the private data with the MTD structure */
 175         autcpu12_mtd->priv = this;
 176
 177         /* Set address of NAND IO lines */
 178         this->IO_ADDR_R = autcpu12_fio_base;
 179         this->IO_ADDR_W = autcpu12_fio_base;
 180         this->hwcontrol = autcpu12_hwcontrol;
 181         this->dev_ready = autcpu12_device_ready;
 182         /* 20 us command delay time */
 183         this->chip_delay = 20;
 184         this->eccmode = NAND_ECC_SOFT;
 185
 186         /* Scan to find existance of the device */
 187         if (nand_scan (autcpu12_mtd)) {
 188                 err = -ENXIO;
 189                 goto out_ior;
 190         }
 191
 192         /* Allocate memory for internal data buffer */
 193         this->data_buf = kmalloc (sizeof(u_char) * (autcpu12_mtd->oobblock + autcpu12_mtd->oobsize), GFP_KERNEL);
 194         if (!this->data_buf) {
 195                 printk ("Unable to allocate NAND data buffer for AUTCPU12.\n");
 196                 err = -ENOMEM;
 197                 goto out_ior;
 198         }
 199
 200         /* Allocate memory for internal data buffer */
 201         this->data_cache = kmalloc (sizeof(u_char) * (autcpu12_mtd->oobblock + autcpu12_mtd->oobsize), GFP_KERNEL);
 202         if (!this->data_cache) {
 203                 printk ("Unable to allocate NAND data cache for AUTCPU12.\n");
 204                 err = -ENOMEM;
 205                 goto out_buf;
 206         }
 207         this->cache_page = -1;
 208
 209         /* Register the partitions */
 210         switch(autcpu12_mtd->size){
 211                 case SZ_16M: add_mtd_partitions(autcpu12_mtd, partition_info16k, NUM_PARTITIONS16K); break;
 212                 case SZ_32M: add_mtd_partitions(autcpu12_mtd, partition_info32k, NUM_PARTITIONS32K); break;
 213                 case SZ_64M: add_mtd_partitions(autcpu12_mtd, partition_info64k, NUM_PARTITIONS64K); break;
 214                 case SZ_128M: add_mtd_partitions(autcpu12_mtd, partition_info128k, NUM_PARTITIONS128K); break;
 215                 default: {
 216                         printk ("Unsupported SmartMedia device\n");
 217                         err = -ENXIO;
 218                         goto out_cac;
 219                 }
 220         }
 221         goto out;
 222
 223 out_cac:
 224         kfree (this->data_cache);
 225 out_buf:
 226         kfree (this->data_buf);
 227 out_ior:
 228         iounmap((void *)autcpu12_fio_base);
 229 out_mtd:
 230         kfree (autcpu12_mtd);
 231 out:
 232         return err;
 233 }
 234
 235 module_init(autcpu12_init);
 236
 237 /*
 238  * Clean up routine
 239  */
 240 #ifdef MODULE
 241 static void __exit autcpu12_cleanup (void)
 242 {
 243         struct nand_chip *this = (struct nand_chip *) &autcpu12_mtd[1];
 244
 245         /* Unregister partitions */
 246         del_mtd_partitions(autcpu12_mtd);
 247
 248         /* Unregister the device */
 249         del_mtd_device (autcpu12_mtd);
 250
 251         /* Free internal data buffers */
 252         kfree (this->data_buf);
 253         kfree (this->data_cache);
 254
 255         /* unmap physical adress */
 256         iounmap((void *)autcpu12_fio_base);
 257
 258         /* Free the MTD device structure */
 259         kfree (autcpu12_mtd);
 260 }
 261 module_exit(autcpu12_cleanup);
 262 #endif
 263
 264 MODULE_LICENSE("GPL");
 265 MODULE_AUTHOR("Thomas Gleixner <tglx@linutronix.de>");
 266 MODULE_DESCRIPTION("Glue layer for SmartMediaCard on autronix autcpu12");