3 * Stäubli Faverges - <www.staubli.com>
4 * Pierre AUBERT p.aubert@staubli.com
6 * See file CREDITS for list of people who contributed to this
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
38 /*-----------------------------------------------------------------------------
40 *-----------------------------------------------------------------------------
48 /*-----------------------------------------------------------------------------
49 * dev_read -- len and where are sectors number
50 *-----------------------------------------------------------------------------
52 int dev_read (void *buffer, int where, int len)
54 PRINTF ("dev_read (len = %d, where = %d)\n", len, where);
56 /* Si on ne desire pas lire a la position courante, il faut un seek */
57 if (where != lastwhere) {
58 if (!fdc_fdos_seek (where)) {
59 PRINTF ("seek error in dev_read");
65 if (!fdc_fdos_read (buffer, len)) {
66 PRINTF ("read error\n");
70 lastwhere = where + len;
73 /*-----------------------------------------------------------------------------
74 * check_dev -- verify the diskette format
75 *-----------------------------------------------------------------------------
77 int check_dev (BootSector_t *boot, Fs_t *fs)
79 unsigned int heads, sectors, tracks;
80 int BootP, Infp0, InfpX, InfTm;
83 /* Display Boot header */
84 PRINTF ("Jump to boot code 0x%02x 0x%02x 0x%02x\n",
85 boot -> jump [0], boot -> jump [1], boot -> jump[2]);
86 PRINTF ("OEM name & version '%*.*s'\n",
87 BANNER_LG, BANNER_LG, boot -> banner );
88 PRINTF ("Bytes per sector hopefully 512 %d\n",
89 __le16_to_cpu (boot -> secsiz));
90 PRINTF ("Cluster size in sectors %d\n",
92 PRINTF ("Number of reserved (boot) sectors %d\n",
93 __le16_to_cpu (boot -> nrsvsect));
94 PRINTF ("Number of FAT tables hopefully 2 %d\n",
96 PRINTF ("Number of directory slots %d\n",
97 __le16_to_cpu (boot -> dirents));
98 PRINTF ("Total sectors on disk %d\n",
99 __le16_to_cpu (boot -> psect));
100 PRINTF ("Media descriptor=first byte of FAT %d\n",
102 PRINTF ("Sectors in FAT %d\n",
103 __le16_to_cpu (boot -> fatlen));
104 PRINTF ("Sectors/track %d\n",
105 __le16_to_cpu (boot -> nsect));
106 PRINTF ("Heads %d\n",
107 __le16_to_cpu (boot -> nheads));
108 PRINTF ("number of hidden sectors %d\n",
109 __le32_to_cpu (boot -> nhs));
110 PRINTF ("big total sectors %d\n",
111 __le32_to_cpu (boot -> bigsect));
112 PRINTF ("physical drive ? %d\n",
114 PRINTF ("reserved %d\n",
116 PRINTF ("dos > 4.0 diskette %d\n",
118 PRINTF ("serial number %d\n",
119 __le32_to_cpu (boot -> serial));
120 PRINTF ("disk label %*.*s\n",
121 LABEL_LG, LABEL_LG, boot -> label);
122 PRINTF ("FAT type %8.8s\n",
124 PRINTF ("reserved by 2M %d\n",
126 PRINTF ("2M checksum (not used) %d\n",
128 PRINTF ("2MF format version %d\n",
130 PRINTF ("1 if write track after format %d\n",
132 PRINTF ("data transfer rate on track 0 %d\n",
134 PRINTF ("data transfer rate on track<>0 %d\n",
136 PRINTF ("offset to boot program %d\n",
137 __le16_to_cpu (boot -> BootP));
138 PRINTF ("T1: information for track 0 %d\n",
139 __le16_to_cpu (boot -> Infp0));
140 PRINTF ("T2: information for track<>0 %d\n",
141 __le16_to_cpu (boot -> InfpX));
142 PRINTF ("T3: track sectors size table %d\n",
143 __le16_to_cpu (boot -> InfTm));
144 PRINTF ("Format date 0x%04x\n",
145 __le16_to_cpu (boot -> DateF));
146 PRINTF ("Format time 0x%04x\n",
147 __le16_to_cpu (boot -> TimeF));
150 /* information is extracted from boot sector */
151 heads = __le16_to_cpu (boot -> nheads);
152 sectors = __le16_to_cpu (boot -> nsect);
153 fs -> tot_sectors = __le32_to_cpu (boot -> bigsect);
154 if (__le16_to_cpu (boot -> psect) != 0) {
155 fs -> tot_sectors = __le16_to_cpu (boot -> psect);
158 sect_per_track = heads * sectors;
159 tracks = (fs -> tot_sectors + sect_per_track - 1) / sect_per_track;
161 BootP = __le16_to_cpu (boot -> BootP);
162 Infp0 = __le16_to_cpu (boot -> Infp0);
163 InfpX = __le16_to_cpu (boot -> InfpX);
164 InfTm = __le16_to_cpu (boot -> InfTm);
166 if (boot -> dos4 == EXTENDED_BOOT &&
167 strncmp( boot->banner,"2M", 2 ) == 0 &&
168 BootP < SZ_STD_SECTOR &&
169 Infp0 < SZ_STD_SECTOR &&
170 InfpX < SZ_STD_SECTOR &&
171 InfTm < SZ_STD_SECTOR &&
172 BootP >= InfTm + 2 &&
180 if (heads != NB_HEADS ||
181 tracks != NB_TRACKS ||
182 sectors != NB_SECTORS ||
183 __le16_to_cpu (boot -> secsiz) != SZ_STD_SECTOR ||
184 fs -> tot_sectors == 0 ||
185 (fs -> tot_sectors % sectors) != 0) {