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-rw-r--r--drivers/mtd/nand/edb7312.c203
1 files changed, 0 insertions, 203 deletions
diff --git a/drivers/mtd/nand/edb7312.c b/drivers/mtd/nand/edb7312.c
deleted file mode 100644
index 8400d0f6dada..000000000000
--- a/drivers/mtd/nand/edb7312.c
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1/*
2 * drivers/mtd/nand/edb7312.c
3 *
4 * Copyright (C) 2002 Marius Gröger (mag@sysgo.de)
5 *
6 * Derived from drivers/mtd/nand/autcpu12.c
7 * Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de)
8 *
9 * 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
15 * CLEP7312 board which utilizes the Toshiba TC58V64AFT part. This is
16 * a 64Mibit (8MiB x 8 bits) NAND flash device.
17 */
18
19#include <linux/slab.h>
20#include <linux/module.h>
21#include <linux/init.h>
22#include <linux/mtd/mtd.h>
23#include <linux/mtd/nand.h>
24#include <linux/mtd/partitions.h>
25#include <asm/io.h>
26#include <mach/hardware.h> /* for CLPS7111_VIRT_BASE */
27#include <asm/sizes.h>
28#include <asm/hardware/clps7111.h>
29
30/*
31 * MTD structure for EDB7312 board
32 */
33static struct mtd_info *ep7312_mtd = NULL;
34
35/*
36 * Values specific to the EDB7312 board (used with EP7312 processor)
37 */
38#define EP7312_FIO_PBASE 0x10000000 /* Phys address of flash */
39#define EP7312_PXDR 0x0001 /*
40 * IO offset to Port B data register
41 * where the CLE, ALE and NCE pins
42 * are wired to.
43 */
44#define EP7312_PXDDR 0x0041 /*
45 * IO offset to Port B data direction
46 * register so we can control the IO
47 * lines.
48 */
49
50/*
51 * Module stuff
52 */
53
54static unsigned long ep7312_fio_pbase = EP7312_FIO_PBASE;
55static void __iomem *ep7312_pxdr = (void __iomem *)EP7312_PXDR;
56static void __iomem *ep7312_pxddr = (void __iomem *)EP7312_PXDDR;
57
58/*
59 * Define static partitions for flash device
60 */
61static struct mtd_partition partition_info[] = {
62 {.name = "EP7312 Nand Flash",
63 .offset = 0,
64 .size = 8 * 1024 * 1024}
65};
66
67#define NUM_PARTITIONS 1
68
69/*
70 * hardware specific access to control-lines
71 *
72 * NAND_NCE: bit 0 -> bit 6 (bit 7 = 1)
73 * NAND_CLE: bit 1 -> bit 4
74 * NAND_ALE: bit 2 -> bit 5
75 */
76static void ep7312_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
77{
78 struct nand_chip *chip = mtd->priv;
79
80 if (ctrl & NAND_CTRL_CHANGE) {
81 unsigned char bits = 0x80;
82
83 bits |= (ctrl & (NAND_CLE | NAND_ALE)) << 3;
84 bits |= (ctrl & NAND_NCE) ? 0x00 : 0x40;
85
86 clps_writeb((clps_readb(ep7312_pxdr) & 0xF0) | bits,
87 ep7312_pxdr);
88 }
89 if (cmd != NAND_CMD_NONE)
90 writeb(cmd, chip->IO_ADDR_W);
91}
92
93/*
94 * read device ready pin
95 */
96static int ep7312_device_ready(struct mtd_info *mtd)
97{
98 return 1;
99}
100
101const char *part_probes[] = { "cmdlinepart", NULL };
102
103/*
104 * Main initialization routine
105 */
106static int __init ep7312_init(void)
107{
108 struct nand_chip *this;
109 const char *part_type = 0;
110 int mtd_parts_nb = 0;
111 struct mtd_partition *mtd_parts = 0;
112 void __iomem *ep7312_fio_base;
113
114 /* Allocate memory for MTD device structure and private data */
115 ep7312_mtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip), GFP_KERNEL);
116 if (!ep7312_mtd) {
117 printk("Unable to allocate EDB7312 NAND MTD device structure.\n");
118 return -ENOMEM;
119 }
120
121 /* map physical address */
122 ep7312_fio_base = ioremap(ep7312_fio_pbase, SZ_1K);
123 if (!ep7312_fio_base) {
124 printk("ioremap EDB7312 NAND flash failed\n");
125 kfree(ep7312_mtd);
126 return -EIO;
127 }
128
129 /* Get pointer to private data */
130 this = (struct nand_chip *)(&ep7312_mtd[1]);
131
132 /* Initialize structures */
133 memset(ep7312_mtd, 0, sizeof(struct mtd_info));
134 memset(this, 0, sizeof(struct nand_chip));
135
136 /* Link the private data with the MTD structure */
137 ep7312_mtd->priv = this;
138 ep7312_mtd->owner = THIS_MODULE;
139
140 /*
141 * Set GPIO Port B control register so that the pins are configured
142 * to be outputs for controlling the NAND flash.
143 */
144 clps_writeb(0xf0, ep7312_pxddr);
145
146 /* insert callbacks */
147 this->IO_ADDR_R = ep7312_fio_base;
148 this->IO_ADDR_W = ep7312_fio_base;
149 this->cmd_ctrl = ep7312_hwcontrol;
150 this->dev_ready = ep7312_device_ready;
151 /* 15 us command delay time */
152 this->chip_delay = 15;
153
154 /* Scan to find existence of the device */
155 if (nand_scan(ep7312_mtd, 1)) {
156 iounmap((void *)ep7312_fio_base);
157 kfree(ep7312_mtd);
158 return -ENXIO;
159 }
160 ep7312_mtd->name = "edb7312-nand";
161 mtd_parts_nb = parse_mtd_partitions(ep7312_mtd, part_probes, &mtd_parts, 0);
162 if (mtd_parts_nb > 0)
163 part_type = "command line";
164 else
165 mtd_parts_nb = 0;
166 if (mtd_parts_nb == 0) {
167 mtd_parts = partition_info;
168 mtd_parts_nb = NUM_PARTITIONS;
169 part_type = "static";
170 }
171
172 /* Register the partitions */
173 printk(KERN_NOTICE "Using %s partition definition\n", part_type);
174 mtd_device_register(ep7312_mtd, mtd_parts, mtd_parts_nb);
175
176 /* Return happy */
177 return 0;
178}
179
180module_init(ep7312_init);
181
182/*
183 * Clean up routine
184 */
185static void __exit ep7312_cleanup(void)
186{
187 struct nand_chip *this = (struct nand_chip *)&ep7312_mtd[1];
188
189 /* Release resources, unregister device */
190 nand_release(ap7312_mtd);
191
192 /* Release io resource */
193 iounmap(this->IO_ADDR_R);
194
195 /* Free the MTD device structure */
196 kfree(ep7312_mtd);
197}
198
199module_exit(ep7312_cleanup);
200
201MODULE_LICENSE("GPL");
202MODULE_AUTHOR("Marius Groeger <mag@sysgo.de>");
203MODULE_DESCRIPTION("MTD map driver for Cogent EDB7312 board");
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-15 07:26:24 -0500