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 1.11 2003/06/04 17:04:09 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 * 16MB, 32MB and 64MB 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;
50 #if LINUX_VERSION_CODE < 0x20212 && defined(MODULE)
51 #define autcpu12_init init_module
52 #define autcpu12_cleanup cleanup_module
55 static int autcpu12_io_base = CS89712_VIRT_BASE;
56 static int autcpu12_fio_pbase = AUTCPU12_PHYS_SMC;
57 static int autcpu12_fio_ctrl = AUTCPU12_SMC_SELECT_OFFSET;
58 static int autcpu12_pedr = AUTCPU12_SMC_PORT_OFFSET;
59 static int autcpu12_fio_base;
62 MODULE_PARM(autcpu12_fio_pbase, "i");
63 MODULE_PARM(autcpu12_fio_ctrl, "i");
64 MODULE_PARM(autcpu12_pedr, "i");
66 __setup("autcpu12_fio_pbase=",autcpu12_fio_pbase);
67 __setup("autcpu12_fio_ctrl=",autcpu12_fio_ctrl);
68 __setup("autcpu12_pedr=",autcpu12_pedr);
72 * Define partitions for flash devices
74 extern struct nand_oobinfo jffs2_oobinfo;
76 static struct mtd_partition partition_info16k[] = {
77 { .name = "AUTCPU12 flash partition 1",
80 { .name = "AUTCPU12 flash partition 2",
85 static struct mtd_partition partition_info32k[] = {
86 { .name = "AUTCPU12 flash partition 1",
89 { .name = "AUTCPU12 flash partition 2",
94 static struct mtd_partition partition_info64k[] = {
95 { .name = "AUTCPU12 flash partition 1",
98 { .name = "AUTCPU12 flash partition 2",
100 .size = 48 * SZ_1M },
103 static struct mtd_partition partition_info128k[] = {
104 { .name = "AUTCPU12 flash partition 1",
106 .size = 16 * SZ_1M },
107 { .name = "AUTCPU12 flash partition 2",
108 .offset = 16 * SZ_1M,
109 .size = 112 * SZ_1M },
112 #define NUM_PARTITIONS16K 2
113 #define NUM_PARTITIONS32K 2
114 #define NUM_PARTITIONS64K 2
115 #define NUM_PARTITIONS128K 2
117 * hardware specific access to control-lines
119 void autcpu12_hwcontrol(int cmd)
124 case NAND_CTL_SETCLE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) |= AUTCPU12_SMC_CLE; break;
125 case NAND_CTL_CLRCLE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) &= ~AUTCPU12_SMC_CLE; break;
127 case NAND_CTL_SETALE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) |= AUTCPU12_SMC_ALE; break;
128 case NAND_CTL_CLRALE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) &= ~AUTCPU12_SMC_ALE; break;
130 case NAND_CTL_SETNCE: (*(volatile unsigned char *) (autcpu12_fio_base + autcpu12_fio_ctrl)) = 0x01; break;
131 case NAND_CTL_CLRNCE: (*(volatile unsigned char *) (autcpu12_fio_base + autcpu12_fio_ctrl)) = 0x00; break;
136 * read device ready pin
138 int autcpu12_device_ready(void)
141 return ( (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) & AUTCPU12_SMC_RDY) ? 1 : 0;
145 * Main initialization routine
147 int __init autcpu12_init (void)
149 struct nand_chip *this;
152 /* Allocate memory for MTD device structure and private data */
153 autcpu12_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct nand_chip),
156 printk ("Unable to allocate AUTCPU12 NAND MTD device structure.\n");
161 /* map physical adress */
162 autcpu12_fio_base=(unsigned long)ioremap(autcpu12_fio_pbase,SZ_1K);
163 if(!autcpu12_fio_base){
164 printk("Ioremap autcpu12 SmartMedia Card failed\n");
169 /* Get pointer to private data */
170 this = (struct nand_chip *) (&autcpu12_mtd[1]);
172 /* Initialize structures */
173 memset((char *) autcpu12_mtd, 0, sizeof(struct mtd_info));
174 memset((char *) this, 0, sizeof(struct nand_chip));
176 /* Link the private data with the MTD structure */
177 autcpu12_mtd->priv = this;
179 /* Set address of NAND IO lines */
180 this->IO_ADDR_R = autcpu12_fio_base;
181 this->IO_ADDR_W = autcpu12_fio_base;
182 this->hwcontrol = autcpu12_hwcontrol;
183 this->dev_ready = autcpu12_device_ready;
184 /* 20 us command delay time */
185 this->chip_delay = 20;
186 this->eccmode = NAND_ECC_SOFT;
188 /* Scan to find existance of the device */
189 if (nand_scan (autcpu12_mtd)) {
194 /* Allocate memory for internal data buffer */
195 this->data_buf = kmalloc (sizeof(u_char) * (autcpu12_mtd->oobblock + autcpu12_mtd->oobsize), GFP_KERNEL);
196 if (!this->data_buf) {
197 printk ("Unable to allocate NAND data buffer for AUTCPU12.\n");
202 /* Register the partitions */
203 switch(autcpu12_mtd->size){
204 case SZ_16M: add_mtd_partitions(autcpu12_mtd, partition_info16k, NUM_PARTITIONS16K); break;
205 case SZ_32M: add_mtd_partitions(autcpu12_mtd, partition_info32k, NUM_PARTITIONS32K); break;
206 case SZ_64M: add_mtd_partitions(autcpu12_mtd, partition_info64k, NUM_PARTITIONS64K); break;
207 case SZ_128M: add_mtd_partitions(autcpu12_mtd, partition_info128k, NUM_PARTITIONS128K); break;
209 printk ("Unsupported SmartMedia device\n");
217 kfree (this->data_buf);
219 iounmap((void *)autcpu12_fio_base);
221 kfree (autcpu12_mtd);
226 module_init(autcpu12_init);
232 static void __exit autcpu12_cleanup (void)
234 struct nand_chip *this = (struct nand_chip *) &autcpu12_mtd[1];
236 /* Unregister partitions */
237 del_mtd_partitions(autcpu12_mtd);
239 /* Unregister the device */
240 del_mtd_device (autcpu12_mtd);
242 /* Free internal data buffers */
243 kfree (this->data_buf);
245 /* unmap physical adress */
246 iounmap((void *)autcpu12_fio_base);
248 /* Free the MTD device structure */
249 kfree (autcpu12_mtd);
251 module_exit(autcpu12_cleanup);
254 MODULE_LICENSE("GPL");
255 MODULE_AUTHOR("Thomas Gleixner <tglx@linutronix.de>");
256 MODULE_DESCRIPTION("Glue layer for SmartMediaCard on autronix autcpu12");