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-rw-r--r--drivers/mtd/nand/Kconfig6
-rw-r--r--drivers/mtd/nand/Makefile1
-rw-r--r--drivers/mtd/nand/ts7250.c208
3 files changed, 215 insertions, 0 deletions
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index cfe288a6e853..b735ab61c1e7 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -55,6 +55,12 @@ config MTD_NAND_TOTO
55 help 55 help
56 Support for NAND flash on Texas Instruments Toto platform. 56 Support for NAND flash on Texas Instruments Toto platform.
57 57
58config MTD_NAND_TS7250
59 tristate "NAND Flash device on TS-7250 board"
60 depends on MACH_TS72XX && MTD_NAND
61 help
62 Support for NAND flash on Technologic Systems TS-7250 platform.
63
58config MTD_NAND_IDS 64config MTD_NAND_IDS
59 tristate 65 tristate
60 66
diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index 41742026a52e..073705bc8c2d 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -17,6 +17,7 @@ obj-$(CONFIG_MTD_NAND_DISKONCHIP) += diskonchip.o
17obj-$(CONFIG_MTD_NAND_H1900) += h1910.o 17obj-$(CONFIG_MTD_NAND_H1900) += h1910.o
18obj-$(CONFIG_MTD_NAND_RTC_FROM4) += rtc_from4.o 18obj-$(CONFIG_MTD_NAND_RTC_FROM4) += rtc_from4.o
19obj-$(CONFIG_MTD_NAND_SHARPSL) += sharpsl.o 19obj-$(CONFIG_MTD_NAND_SHARPSL) += sharpsl.o
20obj-$(CONFIG_MTD_NAND_TS7250) += ts7250.o
20obj-$(CONFIG_MTD_NAND_NANDSIM) += nandsim.o 21obj-$(CONFIG_MTD_NAND_NANDSIM) += nandsim.o
21 22
22nand-objs = nand_base.o nand_bbt.o 23nand-objs = nand_base.o nand_bbt.o
diff --git a/drivers/mtd/nand/ts7250.c b/drivers/mtd/nand/ts7250.c
new file mode 100644
index 000000000000..643633d91a8b
--- /dev/null
+++ b/drivers/mtd/nand/ts7250.c
@@ -0,0 +1,208 @@
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 * $Id: ts7250.c,v 1.4 2004/12/30 22:02:07 joff Exp $
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 *
18 * Overview:
19 * This is a device driver for the NAND flash device found on the
20 * TS-7250 board which utilizes a Samsung 32 Mbyte part.
21 */
22
23#include <linux/slab.h>
24#include <linux/module.h>
25#include <linux/init.h>
26#include <linux/mtd/mtd.h>
27#include <linux/mtd/nand.h>
28#include <linux/mtd/partitions.h>
29#include <asm/io.h>
30#include <asm/arch/hardware.h>
31#include <asm/sizes.h>
32#include <asm/mach-types.h>
33
34/*
35 * MTD structure for TS7250 board
36 */
37static struct mtd_info *ts7250_mtd = NULL;
38
39#ifdef CONFIG_MTD_PARTITIONS
40static const char *part_probes[] = { "cmdlinepart", NULL };
41
42#define NUM_PARTITIONS 3
43
44/*
45 * Define static partitions for flash device
46 */
47static struct mtd_partition partition_info32[] = {
48 {
49 .name = "TS-BOOTROM",
50 .offset = 0x00000000,
51 .size = 0x00004000,
52 }, {
53 .name = "Linux",
54 .offset = 0x00004000,
55 .size = 0x01d00000,
56 }, {
57 .name = "RedBoot",
58 .offset = 0x01d04000,
59 .size = 0x002fc000,
60 },
61};
62
63/*
64 * Define static partitions for flash device
65 */
66static struct mtd_partition partition_info128[] = {
67 {
68 .name = "TS-BOOTROM",
69 .offset = 0x00000000,
70 .size = 0x00004000,
71 }, {
72 .name = "Linux",
73 .offset = 0x00004000,
74 .size = 0x07d00000,
75 }, {
76 .name = "RedBoot",
77 .offset = 0x07d04000,
78 .size = 0x002fc000,
79 },
80};
81#endif
82
83
84/*
85 * hardware specific access to control-lines
86 */
87static void ts7250_hwcontrol(struct mtd_info *mtd, int cmd)
88{
89 unsigned long ctrl = TS72XX_NAND_CONTROL_VIRT_BASE;
90
91 switch(cmd) {
92 case NAND_CTL_SETCLE:
93 __raw_writeb(__raw_readb(ctrl) | 0x2, ctrl);
94 break;
95 case NAND_CTL_CLRCLE:
96 __raw_writeb(__raw_readb(ctrl) & ~0x2, ctrl);
97 break;
98 case NAND_CTL_SETALE:
99 __raw_writeb(__raw_readb(ctrl) | 0x1, ctrl);
100 break;
101 case NAND_CTL_CLRALE:
102 __raw_writeb(__raw_readb(ctrl) & ~0x1, ctrl);
103 break;
104 case NAND_CTL_SETNCE:
105 __raw_writeb(__raw_readb(ctrl) | 0x4, ctrl);
106 break;
107 case NAND_CTL_CLRNCE:
108 __raw_writeb(__raw_readb(ctrl) & ~0x4, ctrl);
109 break;
110 }
111}
112
113/*
114 * read device ready pin
115 */
116static int ts7250_device_ready(struct mtd_info *mtd)
117{
118 return __raw_readb(TS72XX_NAND_BUSY_VIRT_BASE) & 0x20;
119}
120
121/*
122 * Main initialization routine
123 */
124static int __init ts7250_init(void)
125{
126 struct nand_chip *this;
127 const char *part_type = 0;
128 int mtd_parts_nb = 0;
129 struct mtd_partition *mtd_parts = 0;
130
131 if (!machine_is_ts72xx() || board_is_ts7200())
132 return -ENXIO;
133
134 /* Allocate memory for MTD device structure and private data */
135 ts7250_mtd = kmalloc(sizeof(struct mtd_info) +
136 sizeof(struct nand_chip), GFP_KERNEL);
137 if (!ts7250_mtd) {
138 printk("Unable to allocate TS7250 NAND MTD device structure.\n");
139 return -ENOMEM;
140 }
141
142 /* Get pointer to private data */
143 this = (struct nand_chip *)(&ts7250_mtd[1]);
144
145 /* Initialize structures */
146 memset(ts7250_mtd, 0, sizeof(struct mtd_info));
147 memset(this, 0, sizeof(struct nand_chip));
148
149 /* Link the private data with the MTD structure */
150 ts7250_mtd->priv = this;
151
152 /* insert callbacks */
153 this->IO_ADDR_R = (void *)TS72XX_NAND_DATA_VIRT_BASE;
154 this->IO_ADDR_W = (void *)TS72XX_NAND_DATA_VIRT_BASE;
155 this->hwcontrol = ts7250_hwcontrol;
156 this->dev_ready = ts7250_device_ready;
157 this->chip_delay = 15;
158 this->eccmode = NAND_ECC_SOFT;
159
160 printk("Searching for NAND flash...\n");
161 /* Scan to find existence of the device */
162 if (nand_scan(ts7250_mtd, 1)) {
163 kfree(ts7250_mtd);
164 return -ENXIO;
165 }
166
167#ifdef CONFIG_MTD_PARTITIONS
168 ts7250_mtd->name = "ts7250-nand";
169 mtd_parts_nb = parse_mtd_partitions(ts7250_mtd, part_probes,
170 &mtd_parts, 0);
171 if (mtd_parts_nb > 0)
172 part_type = "command line";
173 else
174 mtd_parts_nb = 0;
175#endif
176 if (mtd_parts_nb == 0) {
177 mtd_parts = partition_info32;
178 if (ts7250_mtd->size >= (128 * 0x100000))
179 mtd_parts = partition_info128;
180 mtd_parts_nb = NUM_PARTITIONS;
181 part_type = "static";
182 }
183
184 /* Register the partitions */
185 printk(KERN_NOTICE "Using %s partition definition\n", part_type);
186 add_mtd_partitions(ts7250_mtd, mtd_parts, mtd_parts_nb);
187
188 /* Return happy */
189 return 0;
190}
191module_init(ts7250_init);
192
193/*
194 * Clean up routine
195 */
196static void __exit ts7250_cleanup(void)
197{
198 /* Unregister the device */
199 del_mtd_device(ts7250_mtd);
200
201 /* Free the MTD device structure */
202 kfree(ts7250_mtd);
203}
204module_exit(ts7250_cleanup);
205
206MODULE_LICENSE("GPL");
207MODULE_AUTHOR("Jesse Off <joff@embeddedARM.com>");
208MODULE_DESCRIPTION("MTD map driver for Technologic Systems TS-7250 board");
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-26 13:49:17 -0500