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authorPete Popov <ppopov@pacbell.net>2005-02-27 16:50:25 -0500
committerThomas Gleixner <tglx@mtd.linutronix.de>2005-05-23 06:45:13 -0400
commit002fa30170f9500ac31fa22931c689029af7f27b (patch)
treeb633bd9776af565884251588fc86d7aadbf77c43 /drivers/mtd/maps/db1x00-flash.c
parentd30f11d22549c54e9b05d153e37d166f88a2aa43 (diff)
[MTD] Replace all the Au1x mapping drivers with a simplified single driver
This driver does not have as many options but it's easier to maintain. And, it turns out AMD never shipped boards with different flash densities. Signed-off-by: Pete Popov <ppopov@pacbell.net> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers/mtd/maps/db1x00-flash.c')
-rw-r--r--drivers/mtd/maps/db1x00-flash.c226
1 files changed, 0 insertions, 226 deletions
diff --git a/drivers/mtd/maps/db1x00-flash.c b/drivers/mtd/maps/db1x00-flash.c
deleted file mode 100644
index faa68ec56902..000000000000
--- a/drivers/mtd/maps/db1x00-flash.c
+++ /dev/null
@@ -1,226 +0,0 @@
1/*
2 * Flash memory access on Alchemy Db1xxx boards
3 *
4 * $Id: db1x00-flash.c,v 1.6 2004/11/04 13:24:14 gleixner Exp $
5 *
6 * (C) 2003 Pete Popov <ppopov@embeddedalley.com>
7 *
8 */
9
10#include <linux/config.h>
11#include <linux/module.h>
12#include <linux/types.h>
13#include <linux/init.h>
14#include <linux/kernel.h>
15
16#include <linux/mtd/mtd.h>
17#include <linux/mtd/map.h>
18#include <linux/mtd/partitions.h>
19
20#include <asm/io.h>
21
22#ifdef DEBUG_RW
23#define DBG(x...) printk(x)
24#else
25#define DBG(x...)
26#endif
27
28/* MTD CONFIG OPTIONS */
29#if defined(CONFIG_MTD_DB1X00_BOOT) && defined(CONFIG_MTD_DB1X00_USER)
30#define DB1X00_BOTH_BANKS
31#elif defined(CONFIG_MTD_DB1X00_BOOT) && !defined(CONFIG_MTD_DB1X00_USER)
32#define DB1X00_BOOT_ONLY
33#elif !defined(CONFIG_MTD_DB1X00_BOOT) && defined(CONFIG_MTD_DB1X00_USER)
34#define DB1X00_USER_ONLY
35#endif
36
37static unsigned long window_addr;
38static unsigned long window_size;
39static unsigned long flash_size;
40
41static unsigned short *bcsr = (unsigned short *)0xAE000000;
42static unsigned char flash_bankwidth = 4;
43
44/*
45 * The Db1x boards support different flash densities. We setup
46 * the mtd_partition structures below for default of 64Mbit
47 * flash densities, and override the partitions sizes, if
48 * necessary, after we check the board status register.
49 */
50
51#ifdef DB1X00_BOTH_BANKS
52/* both banks will be used. Combine the first bank and the first
53 * part of the second bank together into a single jffs/jffs2
54 * partition.
55 */
56static struct mtd_partition db1x00_partitions[] = {
57 {
58 .name = "User FS",
59 .size = 0x1c00000,
60 .offset = 0x0000000
61 },{
62 .name = "yamon",
63 .size = 0x0100000,
64 .offset = MTDPART_OFS_APPEND,
65 .mask_flags = MTD_WRITEABLE
66 },{
67 .name = "raw kernel",
68 .size = (0x300000-0x40000), /* last 256KB is env */
69 .offset = MTDPART_OFS_APPEND,
70 }
71};
72#elif defined(DB1X00_BOOT_ONLY)
73static struct mtd_partition db1x00_partitions[] = {
74 {
75 .name = "User FS",
76 .size = 0x00c00000,
77 .offset = 0x0000000
78 },{
79 .name = "yamon",
80 .size = 0x0100000,
81 .offset = MTDPART_OFS_APPEND,
82 .mask_flags = MTD_WRITEABLE
83 },{
84 .name = "raw kernel",
85 .size = (0x300000-0x40000), /* last 256KB is env */
86 .offset = MTDPART_OFS_APPEND,
87 }
88};
89#elif defined(DB1X00_USER_ONLY)
90static struct mtd_partition db1x00_partitions[] = {
91 {
92 .name = "User FS",
93 .size = 0x0e00000,
94 .offset = 0x0000000
95 },{
96 .name = "raw kernel",
97 .size = MTDPART_SIZ_FULL,
98 .offset = MTDPART_OFS_APPEND,
99 }
100};
101#else
102#error MTD_DB1X00 define combo error /* should never happen */
103#endif
104#define NB_OF(x) (sizeof(x)/sizeof(x[0]))
105
106#define NAME "Db1x00 Linux Flash"
107
108static struct map_info db1xxx_mtd_map = {
109 .name = NAME,
110};
111
112static struct mtd_partition *parsed_parts;
113static struct mtd_info *db1xxx_mtd;
114
115/*
116 * Probe the flash density and setup window address and size
117 * based on user CONFIG options. There are times when we don't
118 * want the MTD driver to be probing the boot or user flash,
119 * so having the option to enable only one bank is important.
120 */
121int setup_flash_params(void)
122{
123 switch ((bcsr[2] >> 14) & 0x3) {
124 case 0: /* 64Mbit devices */
125 flash_size = 0x800000; /* 8MB per part */
126#if defined(DB1X00_BOTH_BANKS)
127 window_addr = 0x1E000000;
128 window_size = 0x2000000;
129#elif defined(DB1X00_BOOT_ONLY)
130 window_addr = 0x1F000000;
131 window_size = 0x1000000;
132#else /* USER ONLY */
133 window_addr = 0x1E000000;
134 window_size = 0x1000000;
135#endif
136 break;
137 case 1:
138 /* 128 Mbit devices */
139 flash_size = 0x1000000; /* 16MB per part */
140#if defined(DB1X00_BOTH_BANKS)
141 window_addr = 0x1C000000;
142 window_size = 0x4000000;
143 /* USERFS from 0x1C00 0000 to 0x1FC0 0000 */
144 db1x00_partitions[0].size = 0x3C00000;
145#elif defined(DB1X00_BOOT_ONLY)
146 window_addr = 0x1E000000;
147 window_size = 0x2000000;
148 /* USERFS from 0x1E00 0000 to 0x1FC0 0000 */
149 db1x00_partitions[0].size = 0x1C00000;
150#else /* USER ONLY */
151 window_addr = 0x1C000000;
152 window_size = 0x2000000;
153 /* USERFS from 0x1C00 0000 to 0x1DE00000 */
154 db1x00_partitions[0].size = 0x1DE0000;
155#endif
156 break;
157 case 2:
158 /* 256 Mbit devices */
159 flash_size = 0x4000000; /* 64MB per part */
160#if defined(DB1X00_BOTH_BANKS)
161 return 1;
162#elif defined(DB1X00_BOOT_ONLY)
163 /* Boot ROM flash bank only; no user bank */
164 window_addr = 0x1C000000;
165 window_size = 0x4000000;
166 /* USERFS from 0x1C00 0000 to 0x1FC00000 */
167 db1x00_partitions[0].size = 0x3C00000;
168#else /* USER ONLY */
169 return 1;
170#endif
171 break;
172 default:
173 return 1;
174 }
175 db1xxx_mtd_map.size = window_size;
176 db1xxx_mtd_map.bankwidth = flash_bankwidth;
177 db1xxx_mtd_map.phys = window_addr;
178 db1xxx_mtd_map.bankwidth = flash_bankwidth;
179 return 0;
180}
181
182int __init db1x00_mtd_init(void)
183{
184 struct mtd_partition *parts;
185 int nb_parts = 0;
186
187 if (setup_flash_params())
188 return -ENXIO;
189
190 /*
191 * Static partition definition selection
192 */
193 parts = db1x00_partitions;
194 nb_parts = NB_OF(db1x00_partitions);
195
196 /*
197 * Now let's probe for the actual flash. Do it here since
198 * specific machine settings might have been set above.
199 */
200 printk(KERN_NOTICE "Db1xxx flash: probing %d-bit flash bus\n",
201 db1xxx_mtd_map.bankwidth*8);
202 db1xxx_mtd_map.virt = ioremap(window_addr, window_size);
203 db1xxx_mtd = do_map_probe("cfi_probe", &db1xxx_mtd_map);
204 if (!db1xxx_mtd) return -ENXIO;
205 db1xxx_mtd->owner = THIS_MODULE;
206
207 add_mtd_partitions(db1xxx_mtd, parts, nb_parts);
208 return 0;
209}
210
211static void __exit db1x00_mtd_cleanup(void)
212{
213 if (db1xxx_mtd) {
214 del_mtd_partitions(db1xxx_mtd);
215 map_destroy(db1xxx_mtd);
216 if (parsed_parts)
217 kfree(parsed_parts);
218 }
219}
220
221module_init(db1x00_mtd_init);
222module_exit(db1x00_mtd_cleanup);
223
224MODULE_AUTHOR("Pete Popov");
225MODULE_DESCRIPTION("Db1x00 mtd map driver");
226MODULE_LICENSE("GPL");
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