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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * drivers/mtd/autcpu12.c
3 *
4 * Copyright (c) 2002 Thomas Gleixner <tgxl@linutronix.de>
5 *
6 * Derived from drivers/mtd/spia.c
Thomas Gleixner7abd3ef2006-05-23 23:25:53 +02007 * Copyright (C) 2000 Steven J. Hill (sjhill@realitydiluted.com)
Thomas Gleixner61b03bd2005-11-07 11:15:49 +00008 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 * Overview:
14 * This is a device driver for the NAND flash device found on the
Thomas Gleixner61b03bd2005-11-07 11:15:49 +000015 * autronix autcpu12 board, which is a SmartMediaCard. It supports
Linus Torvalds1da177e2005-04-16 15:20:36 -070016 * 16MiB, 32MiB and 64MiB cards.
17 *
18 *
19 * 02-12-2002 TG Cleanup of module params
20 *
Joe Perches8e87d782008-02-03 17:22:34 +020021 * 02-20-2002 TG adjusted for different rd/wr address support
Linus Torvalds1da177e2005-04-16 15:20:36 -070022 * added support for read device ready/busy line
23 * added page_cache
24 *
25 * 10-06-2002 TG 128K card support added
26 */
27
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <linux/slab.h>
29#include <linux/init.h>
30#include <linux/module.h>
31#include <linux/mtd/mtd.h>
32#include <linux/mtd/nand.h>
33#include <linux/mtd/partitions.h>
34#include <asm/io.h>
Russell Kinga09e64f2008-08-05 16:14:15 +010035#include <mach/hardware.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include <asm/sizes.h>
Russell Kinga09e64f2008-08-05 16:14:15 +010037#include <mach/autcpu12.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038
39/*
40 * MTD structure for AUTCPU12 board
41 */
42static struct mtd_info *autcpu12_mtd = NULL;
David Woodhousee0c7d762006-05-13 18:07:53 +010043static void __iomem *autcpu12_fio_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
45/*
46 * Define partitions for flash devices
47 */
48static struct mtd_partition partition_info16k[] = {
49 { .name = "AUTCPU12 flash partition 1",
50 .offset = 0,
51 .size = 8 * SZ_1M },
52 { .name = "AUTCPU12 flash partition 2",
53 .offset = 8 * SZ_1M,
54 .size = 8 * SZ_1M },
55};
56
57static struct mtd_partition partition_info32k[] = {
58 { .name = "AUTCPU12 flash partition 1",
59 .offset = 0,
60 .size = 8 * SZ_1M },
61 { .name = "AUTCPU12 flash partition 2",
62 .offset = 8 * SZ_1M,
63 .size = 24 * SZ_1M },
64};
65
66static struct mtd_partition partition_info64k[] = {
67 { .name = "AUTCPU12 flash partition 1",
68 .offset = 0,
69 .size = 16 * SZ_1M },
70 { .name = "AUTCPU12 flash partition 2",
71 .offset = 16 * SZ_1M,
72 .size = 48 * SZ_1M },
73};
74
75static struct mtd_partition partition_info128k[] = {
76 { .name = "AUTCPU12 flash partition 1",
77 .offset = 0,
78 .size = 16 * SZ_1M },
79 { .name = "AUTCPU12 flash partition 2",
80 .offset = 16 * SZ_1M,
81 .size = 112 * SZ_1M },
82};
83
84#define NUM_PARTITIONS16K 2
85#define NUM_PARTITIONS32K 2
86#define NUM_PARTITIONS64K 2
87#define NUM_PARTITIONS128K 2
Thomas Gleixner61b03bd2005-11-07 11:15:49 +000088/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 * hardware specific access to control-lines
Thomas Gleixner7abd3ef2006-05-23 23:25:53 +020090 *
91 * ALE bit 4 autcpu12_pedr
92 * CLE bit 5 autcpu12_pedr
93 * NCE bit 0 fio_ctrl
94 *
95 */
96static void autcpu12_hwcontrol(struct mtd_info *mtd, int cmd,
97 unsigned int ctrl)
Linus Torvalds1da177e2005-04-16 15:20:36 -070098{
Thomas Gleixner7abd3ef2006-05-23 23:25:53 +020099 struct nand_chip *chip = mtd->priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100
Thomas Gleixner7abd3ef2006-05-23 23:25:53 +0200101 if (ctrl & NAND_CTRL_CHANGE) {
Yoann Padioleau632155e2007-06-01 00:46:35 -0700102 void __iomem *addr;
Thomas Gleixner7abd3ef2006-05-23 23:25:53 +0200103 unsigned char bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104
Thomas Gleixner7abd3ef2006-05-23 23:25:53 +0200105 addr = CS89712_VIRT_BASE + AUTCPU12_SMC_PORT_OFFSET;
106 bits = (ctrl & NAND_CLE) << 4;
107 bits |= (ctrl & NAND_ALE) << 2;
108 writeb((readb(addr) & ~0x30) | bits, addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109
Thomas Gleixner7abd3ef2006-05-23 23:25:53 +0200110 addr = autcpu12_fio_base + AUTCPU12_SMC_SELECT_OFFSET;
111 writeb((readb(addr) & ~0x1) | (ctrl & NAND_NCE), addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 }
Thomas Gleixner7abd3ef2006-05-23 23:25:53 +0200113
114 if (cmd != NAND_CMD_NONE)
115 writeb(cmd, chip->IO_ADDR_W);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116}
117
118/*
Thomas Gleixner7abd3ef2006-05-23 23:25:53 +0200119 * read device ready pin
120 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121int autcpu12_device_ready(struct mtd_info *mtd)
122{
Thomas Gleixner7abd3ef2006-05-23 23:25:53 +0200123 void __iomem *addr = CS89712_VIRT_BASE + AUTCPU12_SMC_PORT_OFFSET;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124
Thomas Gleixner7abd3ef2006-05-23 23:25:53 +0200125 return readb(addr) & AUTCPU12_SMC_RDY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126}
127
128/*
129 * Main initialization routine
130 */
David Woodhousecead4db2006-05-16 13:54:50 +0100131static int __init autcpu12_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132{
133 struct nand_chip *this;
134 int err = 0;
135
136 /* Allocate memory for MTD device structure and private data */
Thomas Gleixner7abd3ef2006-05-23 23:25:53 +0200137 autcpu12_mtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip),
138 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 if (!autcpu12_mtd) {
David Woodhousee0c7d762006-05-13 18:07:53 +0100140 printk("Unable to allocate AUTCPU12 NAND MTD device structure.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 err = -ENOMEM;
142 goto out;
143 }
144
Joe Perches8e87d782008-02-03 17:22:34 +0200145 /* map physical address */
Thomas Gleixner7abd3ef2006-05-23 23:25:53 +0200146 autcpu12_fio_base = ioremap(AUTCPU12_PHYS_SMC, SZ_1K);
David Woodhousee0c7d762006-05-13 18:07:53 +0100147 if (!autcpu12_fio_base) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 printk("Ioremap autcpu12 SmartMedia Card failed\n");
149 err = -EIO;
150 goto out_mtd;
151 }
152
153 /* Get pointer to private data */
David Woodhousee0c7d762006-05-13 18:07:53 +0100154 this = (struct nand_chip *)(&autcpu12_mtd[1]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
156 /* Initialize structures */
David Woodhousee0c7d762006-05-13 18:07:53 +0100157 memset(autcpu12_mtd, 0, sizeof(struct mtd_info));
158 memset(this, 0, sizeof(struct nand_chip));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159
160 /* Link the private data with the MTD structure */
161 autcpu12_mtd->priv = this;
David Woodhouse552d9202006-05-14 01:20:46 +0100162 autcpu12_mtd->owner = THIS_MODULE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163
164 /* Set address of NAND IO lines */
165 this->IO_ADDR_R = autcpu12_fio_base;
166 this->IO_ADDR_W = autcpu12_fio_base;
Thomas Gleixner7abd3ef2006-05-23 23:25:53 +0200167 this->cmd_ctrl = autcpu12_hwcontrol;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 this->dev_ready = autcpu12_device_ready;
169 /* 20 us command delay time */
Thomas Gleixner61b03bd2005-11-07 11:15:49 +0000170 this->chip_delay = 20;
Thomas Gleixner6dfc6d22006-05-23 12:00:46 +0200171 this->ecc.mode = NAND_ECC_SOFT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172
173 /* Enable the following for a flash based bad block table */
174 /*
Brian Norrisbb9ebd42011-05-31 16:31:23 -0700175 this->bbt_options = NAND_BBT_USE_FLASH;
David Woodhousee0c7d762006-05-13 18:07:53 +0100176 */
Brian Norrisbb9ebd42011-05-31 16:31:23 -0700177 this->bbt_options = NAND_BBT_USE_FLASH;
Thomas Gleixner61b03bd2005-11-07 11:15:49 +0000178
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300179 /* Scan to find existence of the device */
David Woodhousee0c7d762006-05-13 18:07:53 +0100180 if (nand_scan(autcpu12_mtd, 1)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 err = -ENXIO;
182 goto out_ior;
183 }
Thomas Gleixner61b03bd2005-11-07 11:15:49 +0000184
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 /* Register the partitions */
David Woodhousee0c7d762006-05-13 18:07:53 +0100186 switch (autcpu12_mtd->size) {
Thomas Gleixner7abd3ef2006-05-23 23:25:53 +0200187 case SZ_16M:
Jamie Ilesee0e87b2011-05-23 10:23:40 +0100188 mtd_device_register(autcpu12_mtd, partition_info16k,
189 NUM_PARTITIONS16K);
Thomas Gleixner7abd3ef2006-05-23 23:25:53 +0200190 break;
191 case SZ_32M:
Jamie Ilesee0e87b2011-05-23 10:23:40 +0100192 mtd_device_register(autcpu12_mtd, partition_info32k,
193 NUM_PARTITIONS32K);
Thomas Gleixner7abd3ef2006-05-23 23:25:53 +0200194 break;
195 case SZ_64M:
Jamie Ilesee0e87b2011-05-23 10:23:40 +0100196 mtd_device_register(autcpu12_mtd, partition_info64k,
197 NUM_PARTITIONS64K);
Thomas Gleixner7abd3ef2006-05-23 23:25:53 +0200198 break;
199 case SZ_128M:
Jamie Ilesee0e87b2011-05-23 10:23:40 +0100200 mtd_device_register(autcpu12_mtd, partition_info128k,
201 NUM_PARTITIONS128K);
Thomas Gleixner7abd3ef2006-05-23 23:25:53 +0200202 break;
David Woodhousee0c7d762006-05-13 18:07:53 +0100203 default:
204 printk("Unsupported SmartMedia device\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 err = -ENXIO;
206 goto out_ior;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 }
208 goto out;
209
David Woodhousee0c7d762006-05-13 18:07:53 +0100210 out_ior:
Thomas Gleixner7abd3ef2006-05-23 23:25:53 +0200211 iounmap(autcpu12_fio_base);
David Woodhousee0c7d762006-05-13 18:07:53 +0100212 out_mtd:
213 kfree(autcpu12_mtd);
214 out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 return err;
216}
217
218module_init(autcpu12_init);
219
220/*
221 * Clean up routine
222 */
David Woodhousee0c7d762006-05-13 18:07:53 +0100223static void __exit autcpu12_cleanup(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224{
225 /* Release resources, unregister device */
David Woodhousee0c7d762006-05-13 18:07:53 +0100226 nand_release(autcpu12_mtd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
Joe Perches8e87d782008-02-03 17:22:34 +0200228 /* unmap physical address */
Thomas Gleixner7abd3ef2006-05-23 23:25:53 +0200229 iounmap(autcpu12_fio_base);
Thomas Gleixner61b03bd2005-11-07 11:15:49 +0000230
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 /* Free the MTD device structure */
David Woodhousee0c7d762006-05-13 18:07:53 +0100232 kfree(autcpu12_mtd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233}
David Woodhousee0c7d762006-05-13 18:07:53 +0100234
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235module_exit(autcpu12_cleanup);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236
237MODULE_LICENSE("GPL");
238MODULE_AUTHOR("Thomas Gleixner <tglx@linutronix.de>");
239MODULE_DESCRIPTION("Glue layer for SmartMediaCard on autronix autcpu12");