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author | Frank Gevaerts <frank@gevaerts.be> | 2008-11-03 20:52:27 +0000 |
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committer | Frank Gevaerts <frank@gevaerts.be> | 2008-11-03 20:52:27 +0000 |
commit | 214cd81f080436fddb1994ed712f1000e143dfd7 (patch) | |
tree | 98e8deb0db4160385c4b73291031e61c4bc0c516 /firmware/drivers | |
parent | 65d9ca8a6f557847cf87ffe37e5b1ef48b1fa11b (diff) | |
download | rockbox-214cd81f080436fddb1994ed712f1000e143dfd7.tar.gz rockbox-214cd81f080436fddb1994ed712f1000e143dfd7.zip |
Add ramdisk storage driver. It will be useful for developing multi-driver storage
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18993 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/drivers')
-rw-r--r-- | firmware/drivers/ramdisk.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/firmware/drivers/ramdisk.c b/firmware/drivers/ramdisk.c new file mode 100644 index 0000000000..da0a12f836 --- /dev/null +++ b/firmware/drivers/ramdisk.c | |||
@@ -0,0 +1,102 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id: ramdisk.c 18965 2008-11-01 17:33:21Z gevaerts $ | ||
9 | * | ||
10 | * Copyright (C) 2008 Frank Gevaerts | ||
11 | * | ||
12 | * This program is free software; you can redistribute it and/or | ||
13 | * modify it under the terms of the GNU General Public License | ||
14 | * as published by the Free Software Foundation; either version 2 | ||
15 | * of the License, or (at your option) any later version. | ||
16 | * | ||
17 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
18 | * KIND, either express or implied. | ||
19 | * | ||
20 | ****************************************************************************/ | ||
21 | |||
22 | #include <stdbool.h> | ||
23 | #include <string.h> | ||
24 | |||
25 | #include "storage.h" | ||
26 | |||
27 | #define SECTOR_SIZE 512 | ||
28 | #define NUM_SECTORS 16384 | ||
29 | |||
30 | extern unsigned char ramdisk[SECTOR_SIZE * NUM_SECTORS]; | ||
31 | |||
32 | long last_disk_activity = -1; | ||
33 | |||
34 | int ramdisk_read_sectors(IF_MV2(int drive,) | ||
35 | unsigned long start, | ||
36 | int count, | ||
37 | void* buf) | ||
38 | { | ||
39 | if(start+count>=NUM_SECTORS) | ||
40 | { | ||
41 | return -1; | ||
42 | } | ||
43 | memcpy(buf,&ramdisk[start*SECTOR_SIZE],count*SECTOR_SIZE); | ||
44 | return 0; | ||
45 | } | ||
46 | |||
47 | int ramdisk_write_sectors(IF_MV2(int drive,) | ||
48 | unsigned long start, | ||
49 | int count, | ||
50 | const void* buf) | ||
51 | { | ||
52 | if(start+count>=NUM_SECTORS) | ||
53 | { | ||
54 | return -1; | ||
55 | } | ||
56 | memcpy(&ramdisk[start*SECTOR_SIZE],buf,count*SECTOR_SIZE); | ||
57 | return 0; | ||
58 | } | ||
59 | |||
60 | int ramdisk_init(void) | ||
61 | { | ||
62 | return 0; | ||
63 | } | ||
64 | |||
65 | long ramdisk_last_disk_activity(void) | ||
66 | { | ||
67 | return last_disk_activity; | ||
68 | } | ||
69 | |||
70 | void ramdisk_sleep(void) | ||
71 | { | ||
72 | } | ||
73 | |||
74 | void ramdisk_spin(void) | ||
75 | { | ||
76 | } | ||
77 | |||
78 | void ramdisk_sleepnow(void) | ||
79 | { | ||
80 | } | ||
81 | |||
82 | void ramdisk_spindown(int seconds) | ||
83 | { | ||
84 | (void)seconds; | ||
85 | } | ||
86 | #ifdef STORAGE_GET_INFO | ||
87 | void ramdisk_get_info(struct storage_info *info) | ||
88 | { | ||
89 | /* firmware version */ | ||
90 | info->revision="0.00"; | ||
91 | |||
92 | /* vendor field, need better name? */ | ||
93 | info->vendor="Rockbox"; | ||
94 | /* model field, need better name? */ | ||
95 | info->product="Ramdisk"; | ||
96 | |||
97 | /* blocks count */ | ||
98 | info->num_sectors=NUM_SECTORS; | ||
99 | info->sector_size=SECTOR_SIZE; | ||
100 | } | ||
101 | #endif | ||
102 | |||