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-rw-r--r--drivers/mtd/nand/autcpu12.c225
1 files changed, 225 insertions, 0 deletions
diff --git a/drivers/mtd/nand/autcpu12.c b/drivers/mtd/nand/autcpu12.c
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index 000000000000..4afa8ced05ad
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+++ b/drivers/mtd/nand/autcpu12.c
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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 1.22 2004/11/04 12:53:10 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 * 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 */
45static struct mtd_info *autcpu12_mtd = NULL;
46
47static int autcpu12_io_base = CS89712_VIRT_BASE;
48static int autcpu12_fio_pbase = AUTCPU12_PHYS_SMC;
49static int autcpu12_fio_ctrl = AUTCPU12_SMC_SELECT_OFFSET;
50static int autcpu12_pedr = AUTCPU12_SMC_PORT_OFFSET;
51static void __iomem * autcpu12_fio_base;
52
53/*
54 * Define partitions for flash devices
55 */
56static 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
65static 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
74static 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
83static 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
96/*
97 * hardware specific access to control-lines
98*/
99static 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*/
118int 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 */
128int __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 */
166 this->chip_delay = 20;
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;
174
175 /* Scan to find existance of the device */
176 if (nand_scan (autcpu12_mtd, 1)) {
177 err = -ENXIO;
178 goto out_ior;
179 }
180
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;
187 default: {
188 printk ("Unsupported SmartMedia device\n");
189 err = -ENXIO;
190 goto out_ior;
191 }
192 }
193 goto out;
194
195out_ior:
196 iounmap((void *)autcpu12_fio_base);
197out_mtd:
198 kfree (autcpu12_mtd);
199out:
200 return err;
201}
202
203module_init(autcpu12_init);
204
205/*
206 * Clean up routine
207 */
208#ifdef MODULE
209static 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);
216
217 /* Free the MTD device structure */
218 kfree (autcpu12_mtd);
219}
220module_exit(autcpu12_cleanup);
221#endif
222
223MODULE_LICENSE("GPL");
224MODULE_AUTHOR("Thomas Gleixner <tglx@linutronix.de>");
225MODULE_DESCRIPTION("Glue layer for SmartMediaCard on autronix autcpu12");
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-17 17:51:33 -0500