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1da177e4 LT |
1 | /* |
2 | * drivers/mtd/nand/h1910.c | |
3 | * | |
4 | * Copyright (C) 2003 Joshua Wise (joshua@joshuawise.com) | |
5 | * | |
6 | * Derived from drivers/mtd/nand/edb7312.c | |
151e7659 | 7 | * Copyright (C) 2002 Marius Gröger (mag@sysgo.de) |
1da177e4 LT |
8 | * Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de) |
9 | * | |
61b03bd7 | 10 | * $Id: h1910.c,v 1.6 2005/11/07 11:14:30 gleixner Exp $ |
1da177e4 LT |
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 | * iPAQ h1910 board which utilizes the Samsung K9F2808 part. This is | |
19 | * a 128Mibit (16MiB x 8 bits) NAND flash device. | |
20 | */ | |
21 | ||
22 | #include <linux/slab.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/mtd/mtd.h> | |
26 | #include <linux/mtd/nand.h> | |
27 | #include <linux/mtd/partitions.h> | |
28 | #include <asm/io.h> | |
e0c7d767 | 29 | #include <asm/arch/hardware.h> /* for CLPS7111_VIRT_BASE */ |
1da177e4 LT |
30 | #include <asm/sizes.h> |
31 | #include <asm/arch/h1900-gpio.h> | |
32 | #include <asm/arch/ipaq.h> | |
33 | ||
34 | /* | |
35 | * MTD structure for EDB7312 board | |
36 | */ | |
37 | static struct mtd_info *h1910_nand_mtd = NULL; | |
38 | ||
39 | /* | |
40 | * Module stuff | |
41 | */ | |
42 | ||
43 | #ifdef CONFIG_MTD_PARTITIONS | |
44 | /* | |
45 | * Define static partitions for flash device | |
46 | */ | |
47 | static struct mtd_partition partition_info[] = { | |
e0c7d767 DW |
48 | {name:"h1910 NAND Flash", |
49 | offset:0, | |
50 | size:16 * 1024 * 1024} | |
1da177e4 | 51 | }; |
e0c7d767 | 52 | |
1da177e4 LT |
53 | #define NUM_PARTITIONS 1 |
54 | ||
55 | #endif | |
56 | ||
61b03bd7 | 57 | /* |
1da177e4 LT |
58 | * hardware specific access to control-lines |
59 | */ | |
61b03bd7 | 60 | static void h1910_hwcontrol(struct mtd_info *mtd, int cmd) |
1da177e4 | 61 | { |
e0c7d767 | 62 | struct nand_chip *this = (struct nand_chip *)(mtd->priv); |
61b03bd7 | 63 | |
e0c7d767 | 64 | switch (cmd) { |
61b03bd7 TG |
65 | |
66 | case NAND_CTL_SETCLE: | |
1da177e4 LT |
67 | this->IO_ADDR_R |= (1 << 2); |
68 | this->IO_ADDR_W |= (1 << 2); | |
69 | break; | |
61b03bd7 | 70 | case NAND_CTL_CLRCLE: |
1da177e4 LT |
71 | this->IO_ADDR_R &= ~(1 << 2); |
72 | this->IO_ADDR_W &= ~(1 << 2); | |
73 | break; | |
61b03bd7 | 74 | |
1da177e4 LT |
75 | case NAND_CTL_SETALE: |
76 | this->IO_ADDR_R |= (1 << 3); | |
77 | this->IO_ADDR_W |= (1 << 3); | |
78 | break; | |
79 | case NAND_CTL_CLRALE: | |
80 | this->IO_ADDR_R &= ~(1 << 3); | |
81 | this->IO_ADDR_W &= ~(1 << 3); | |
82 | break; | |
61b03bd7 | 83 | |
1da177e4 LT |
84 | case NAND_CTL_SETNCE: |
85 | break; | |
86 | case NAND_CTL_CLRNCE: | |
87 | break; | |
88 | } | |
89 | } | |
90 | ||
91 | /* | |
92 | * read device ready pin | |
93 | */ | |
94 | #if 0 | |
95 | static int h1910_device_ready(struct mtd_info *mtd) | |
96 | { | |
97 | return (GPLR(55) & GPIO_bit(55)); | |
98 | } | |
99 | #endif | |
100 | ||
101 | /* | |
102 | * Main initialization routine | |
103 | */ | |
e0c7d767 | 104 | static int __init h1910_init(void) |
1da177e4 LT |
105 | { |
106 | struct nand_chip *this; | |
107 | const char *part_type = 0; | |
108 | int mtd_parts_nb = 0; | |
109 | struct mtd_partition *mtd_parts = 0; | |
110 | void __iomem *nandaddr; | |
61b03bd7 | 111 | |
1da177e4 LT |
112 | if (!machine_is_h1900()) |
113 | return -ENODEV; | |
61b03bd7 | 114 | |
0c2e4b4f | 115 | nandaddr = ioremap(0x08000000, 0x1000); |
1da177e4 LT |
116 | if (!nandaddr) { |
117 | printk("Failed to ioremap nand flash.\n"); | |
118 | return -ENOMEM; | |
119 | } | |
61b03bd7 | 120 | |
1da177e4 | 121 | /* Allocate memory for MTD device structure and private data */ |
e0c7d767 | 122 | h1910_nand_mtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip), GFP_KERNEL); |
1da177e4 LT |
123 | if (!h1910_nand_mtd) { |
124 | printk("Unable to allocate h1910 NAND MTD device structure.\n"); | |
e0c7d767 | 125 | iounmap((void *)nandaddr); |
1da177e4 LT |
126 | return -ENOMEM; |
127 | } | |
61b03bd7 | 128 | |
1da177e4 | 129 | /* Get pointer to private data */ |
e0c7d767 | 130 | this = (struct nand_chip *)(&h1910_nand_mtd[1]); |
61b03bd7 | 131 | |
1da177e4 | 132 | /* Initialize structures */ |
e0c7d767 DW |
133 | memset(h1910_nand_mtd, 0, sizeof(struct mtd_info)); |
134 | memset(this, 0, sizeof(struct nand_chip)); | |
61b03bd7 | 135 | |
1da177e4 LT |
136 | /* Link the private data with the MTD structure */ |
137 | h1910_nand_mtd->priv = this; | |
552d9205 | 138 | h1910_nand_mtd->owner = THIS_MODULE; |
61b03bd7 | 139 | |
1da177e4 LT |
140 | /* |
141 | * Enable VPEN | |
142 | */ | |
143 | GPSR(37) = GPIO_bit(37); | |
61b03bd7 | 144 | |
1da177e4 LT |
145 | /* insert callbacks */ |
146 | this->IO_ADDR_R = nandaddr; | |
147 | this->IO_ADDR_W = nandaddr; | |
148 | this->hwcontrol = h1910_hwcontrol; | |
149 | this->dev_ready = NULL; /* unknown whether that was correct or not so we will just do it like this */ | |
150 | /* 15 us command delay time */ | |
151 | this->chip_delay = 50; | |
6dfc6d25 | 152 | this->ecc.mode = NAND_ECC_SOFT; |
1da177e4 | 153 | this->options = NAND_NO_AUTOINCR; |
61b03bd7 | 154 | |
1da177e4 | 155 | /* Scan to find existence of the device */ |
e0c7d767 | 156 | if (nand_scan(h1910_nand_mtd, 1)) { |
1da177e4 | 157 | printk(KERN_NOTICE "No NAND device - returning -ENXIO\n"); |
e0c7d767 DW |
158 | kfree(h1910_nand_mtd); |
159 | iounmap((void *)nandaddr); | |
1da177e4 LT |
160 | return -ENXIO; |
161 | } | |
1da177e4 | 162 | #ifdef CONFIG_MTD_CMDLINE_PARTS |
e0c7d767 | 163 | mtd_parts_nb = parse_cmdline_partitions(h1910_nand_mtd, &mtd_parts, "h1910-nand"); |
1da177e4 | 164 | if (mtd_parts_nb > 0) |
e0c7d767 | 165 | part_type = "command line"; |
1da177e4 | 166 | else |
e0c7d767 | 167 | mtd_parts_nb = 0; |
1da177e4 | 168 | #endif |
e0c7d767 | 169 | if (mtd_parts_nb == 0) { |
1da177e4 LT |
170 | mtd_parts = partition_info; |
171 | mtd_parts_nb = NUM_PARTITIONS; | |
172 | part_type = "static"; | |
173 | } | |
61b03bd7 | 174 | |
1da177e4 LT |
175 | /* Register the partitions */ |
176 | printk(KERN_NOTICE "Using %s partition definition\n", part_type); | |
177 | add_mtd_partitions(h1910_nand_mtd, mtd_parts, mtd_parts_nb); | |
61b03bd7 | 178 | |
1da177e4 LT |
179 | /* Return happy */ |
180 | return 0; | |
181 | } | |
e0c7d767 | 182 | |
1da177e4 LT |
183 | module_init(h1910_init); |
184 | ||
185 | /* | |
186 | * Clean up routine | |
187 | */ | |
e0c7d767 | 188 | static void __exit h1910_cleanup(void) |
1da177e4 | 189 | { |
e0c7d767 | 190 | struct nand_chip *this = (struct nand_chip *)&h1910_nand_mtd[1]; |
61b03bd7 | 191 | |
1da177e4 | 192 | /* Release resources, unregister device */ |
e0c7d767 | 193 | nand_release(h1910_nand_mtd); |
1da177e4 LT |
194 | |
195 | /* Release io resource */ | |
e0c7d767 | 196 | iounmap((void *)this->IO_ADDR_W); |
1da177e4 LT |
197 | |
198 | /* Free the MTD device structure */ | |
e0c7d767 | 199 | kfree(h1910_nand_mtd); |
1da177e4 | 200 | } |
e0c7d767 | 201 | |
1da177e4 LT |
202 | module_exit(h1910_cleanup); |
203 | ||
204 | MODULE_LICENSE("GPL"); | |
205 | MODULE_AUTHOR("Joshua Wise <joshua at joshuawise dot com>"); | |
206 | MODULE_DESCRIPTION("NAND flash driver for iPAQ h1910"); |