2 * drivers/mtd/autcpu12.c
4 * Copyright (c) 2002 Thomas Gleixner <tgxl@linutronix.de>
6 * Derived from drivers/mtd/spia.c
7 * Copyright (C) 2000 Steven J. Hill (sjhill@realitydiluted.com)
9 * $Id: autcpu12.c,v 1.23 2005/11/07 11:14:30 gleixner Exp $
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.
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 * 16MiB, 32MiB and 64MiB cards.
21 * 02-12-2002 TG Cleanup of module params
23 * 02-20-2002 TG adjusted for different rd/wr adress support
24 * added support for read device ready/busy line
27 * 10-06-2002 TG 128K card support added
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>
38 #include <asm/arch/hardware.h>
39 #include <asm/sizes.h>
40 #include <asm/arch/autcpu12.h>
43 * MTD structure for AUTCPU12 board
45 static struct mtd_info *autcpu12_mtd = NULL;
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;
54 * Define partitions for flash devices
56 static struct mtd_partition partition_info16k[] = {
57 { .name = "AUTCPU12 flash partition 1",
60 { .name = "AUTCPU12 flash partition 2",
65 static struct mtd_partition partition_info32k[] = {
66 { .name = "AUTCPU12 flash partition 1",
69 { .name = "AUTCPU12 flash partition 2",
74 static struct mtd_partition partition_info64k[] = {
75 { .name = "AUTCPU12 flash partition 1",
78 { .name = "AUTCPU12 flash partition 2",
83 static struct mtd_partition partition_info128k[] = {
84 { .name = "AUTCPU12 flash partition 1",
87 { .name = "AUTCPU12 flash partition 2",
89 .size = 112 * SZ_1M },
92 #define NUM_PARTITIONS16K 2
93 #define NUM_PARTITIONS32K 2
94 #define NUM_PARTITIONS64K 2
95 #define NUM_PARTITIONS128K 2
97 * hardware specific access to control-lines
99 static void autcpu12_hwcontrol(struct mtd_info *mtd, int cmd)
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;
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;
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;
116 * read device ready pin
118 int autcpu12_device_ready(struct mtd_info *mtd)
121 return ( (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) & AUTCPU12_SMC_RDY) ? 1 : 0;
126 * Main initialization routine
128 int __init autcpu12_init (void)
130 struct nand_chip *this;
133 /* Allocate memory for MTD device structure and private data */
134 autcpu12_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct nand_chip),
137 printk ("Unable to allocate AUTCPU12 NAND MTD device structure.\n");
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");
150 /* Get pointer to private data */
151 this = (struct nand_chip *) (&autcpu12_mtd[1]);
153 /* Initialize structures */
154 memset((char *) autcpu12_mtd, 0, sizeof(struct mtd_info));
155 memset((char *) this, 0, sizeof(struct nand_chip));
157 /* Link the private data with the MTD structure */
158 autcpu12_mtd->priv = this;
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 */
166 this->chip_delay = 20;
167 this->eccmode = NAND_ECC_SOFT;
169 /* Enable the following for a flash based bad block table */
171 this->options = NAND_USE_FLASH_BBT;
173 this->options = NAND_USE_FLASH_BBT;
175 /* Scan to find existance of the device */
176 if (nand_scan (autcpu12_mtd, 1)) {
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;
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;
188 printk ("Unsupported SmartMedia device\n");
196 iounmap((void *)autcpu12_fio_base);
198 kfree (autcpu12_mtd);
203 module_init(autcpu12_init);
209 static void __exit autcpu12_cleanup (void)
211 /* Release resources, unregister device */
212 nand_release (autcpu12_mtd);
214 /* unmap physical adress */
215 iounmap((void *)autcpu12_fio_base);
217 /* Free the MTD device structure */
218 kfree (autcpu12_mtd);
220 module_exit(autcpu12_cleanup);
223 MODULE_LICENSE("GPL");
224 MODULE_AUTHOR("Thomas Gleixner <tglx@linutronix.de>");
225 MODULE_DESCRIPTION("Glue layer for SmartMediaCard on autronix autcpu12");