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-rw-r--r--drivers/mtd/nand/ts7250.c207
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diff --git a/drivers/mtd/nand/ts7250.c b/drivers/mtd/nand/ts7250.c
deleted file mode 100644
index 0f5562aeedc1..000000000000
--- a/drivers/mtd/nand/ts7250.c
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1/*
2 * drivers/mtd/nand/ts7250.c
3 *
4 * Copyright (C) 2004 Technologic Systems (support@embeddedARM.com)
5 *
6 * Derived from drivers/mtd/nand/edb7312.c
7 * Copyright (C) 2004 Marius Gröger (mag@sysgo.de)
8 *
9 * Derived from drivers/mtd/nand/autcpu12.c
10 * Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de)
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
15 *
16 * Overview:
17 * This is a device driver for the NAND flash device found on the
18 * TS-7250 board which utilizes a Samsung 32 Mbyte part.
19 */
20
21#include <linux/slab.h>
22#include <linux/module.h>
23#include <linux/init.h>
24#include <linux/mtd/mtd.h>
25#include <linux/mtd/nand.h>
26#include <linux/mtd/partitions.h>
27#include <linux/io.h>
28
29#include <mach/hardware.h>
30#include <mach/ts72xx.h>
31
32#include <asm/sizes.h>
33#include <asm/mach-types.h>
34
35/*
36 * MTD structure for TS7250 board
37 */
38static struct mtd_info *ts7250_mtd = NULL;
39
40#ifdef CONFIG_MTD_PARTITIONS
41static const char *part_probes[] = { "cmdlinepart", NULL };
42
43#define NUM_PARTITIONS 3
44
45/*
46 * Define static partitions for flash device
47 */
48static struct mtd_partition partition_info32[] = {
49 {
50 .name = "TS-BOOTROM",
51 .offset = 0x00000000,
52 .size = 0x00004000,
53 }, {
54 .name = "Linux",
55 .offset = 0x00004000,
56 .size = 0x01d00000,
57 }, {
58 .name = "RedBoot",
59 .offset = 0x01d04000,
60 .size = 0x002fc000,
61 },
62};
63
64/*
65 * Define static partitions for flash device
66 */
67static struct mtd_partition partition_info128[] = {
68 {
69 .name = "TS-BOOTROM",
70 .offset = 0x00000000,
71 .size = 0x00004000,
72 }, {
73 .name = "Linux",
74 .offset = 0x00004000,
75 .size = 0x07d00000,
76 }, {
77 .name = "RedBoot",
78 .offset = 0x07d04000,
79 .size = 0x002fc000,
80 },
81};
82#endif
83
84
85/*
86 * hardware specific access to control-lines
87 *
88 * ctrl:
89 * NAND_NCE: bit 0 -> bit 2
90 * NAND_CLE: bit 1 -> bit 1
91 * NAND_ALE: bit 2 -> bit 0
92 */
93static void ts7250_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
94{
95 struct nand_chip *chip = mtd->priv;
96
97 if (ctrl & NAND_CTRL_CHANGE) {
98 unsigned long addr = TS72XX_NAND_CONTROL_VIRT_BASE;
99 unsigned char bits;
100
101 bits = (ctrl & NAND_NCE) << 2;
102 bits |= ctrl & NAND_CLE;
103 bits |= (ctrl & NAND_ALE) >> 2;
104
105 __raw_writeb((__raw_readb(addr) & ~0x7) | bits, addr);
106 }
107
108 if (cmd != NAND_CMD_NONE)
109 writeb(cmd, chip->IO_ADDR_W);
110}
111
112/*
113 * read device ready pin
114 */
115static int ts7250_device_ready(struct mtd_info *mtd)
116{
117 return __raw_readb(TS72XX_NAND_BUSY_VIRT_BASE) & 0x20;
118}
119
120/*
121 * Main initialization routine
122 */
123static int __init ts7250_init(void)
124{
125 struct nand_chip *this;
126 const char *part_type = 0;
127 int mtd_parts_nb = 0;
128 struct mtd_partition *mtd_parts = 0;
129
130 if (!machine_is_ts72xx() || board_is_ts7200())
131 return -ENXIO;
132
133 /* Allocate memory for MTD device structure and private data */
134 ts7250_mtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip), GFP_KERNEL);
135 if (!ts7250_mtd) {
136 printk("Unable to allocate TS7250 NAND MTD device structure.\n");
137 return -ENOMEM;
138 }
139
140 /* Get pointer to private data */
141 this = (struct nand_chip *)(&ts7250_mtd[1]);
142
143 /* Initialize structures */
144 memset(ts7250_mtd, 0, sizeof(struct mtd_info));
145 memset(this, 0, sizeof(struct nand_chip));
146
147 /* Link the private data with the MTD structure */
148 ts7250_mtd->priv = this;
149 ts7250_mtd->owner = THIS_MODULE;
150
151 /* insert callbacks */
152 this->IO_ADDR_R = (void *)TS72XX_NAND_DATA_VIRT_BASE;
153 this->IO_ADDR_W = (void *)TS72XX_NAND_DATA_VIRT_BASE;
154 this->cmd_ctrl = ts7250_hwcontrol;
155 this->dev_ready = ts7250_device_ready;
156 this->chip_delay = 15;
157 this->ecc.mode = NAND_ECC_SOFT;
158
159 printk("Searching for NAND flash...\n");
160 /* Scan to find existence of the device */
161 if (nand_scan(ts7250_mtd, 1)) {
162 kfree(ts7250_mtd);
163 return -ENXIO;
164 }
165#ifdef CONFIG_MTD_PARTITIONS
166 ts7250_mtd->name = "ts7250-nand";
167 mtd_parts_nb = parse_mtd_partitions(ts7250_mtd, part_probes, &mtd_parts, 0);
168 if (mtd_parts_nb > 0)
169 part_type = "command line";
170 else
171 mtd_parts_nb = 0;
172#endif
173 if (mtd_parts_nb == 0) {
174 mtd_parts = partition_info32;
175 if (ts7250_mtd->size >= (128 * 0x100000))
176 mtd_parts = partition_info128;
177 mtd_parts_nb = NUM_PARTITIONS;
178 part_type = "static";
179 }
180
181 /* Register the partitions */
182 printk(KERN_NOTICE "Using %s partition definition\n", part_type);
183 add_mtd_partitions(ts7250_mtd, mtd_parts, mtd_parts_nb);
184
185 /* Return happy */
186 return 0;
187}
188
189module_init(ts7250_init);
190
191/*
192 * Clean up routine
193 */
194static void __exit ts7250_cleanup(void)
195{
196 /* Unregister the device */
197 del_mtd_device(ts7250_mtd);
198
199 /* Free the MTD device structure */
200 kfree(ts7250_mtd);
201}
202
203module_exit(ts7250_cleanup);
204
205MODULE_LICENSE("GPL");
206MODULE_AUTHOR("Jesse Off <joff@embeddedARM.com>");
207MODULE_DESCRIPTION("MTD map driver for Technologic Systems TS-7250 board");
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-21 04:44:32 -0500