[1] | 1 | /* Lecture des disquettes Thomson sous Linux |
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| 2 | * Version 2.1 |
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| 3 | * Copyright (C) 2000-2003 Eric Botcazou |
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| 4 | * |
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| 5 | * This program is free software; you can redistribute it and/or modify |
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| 6 | * it under the terms of the GNU General Public License as published by |
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| 7 | * the Free Software Foundation; either version 2 of the License, or |
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| 8 | * (at your option) any later version. |
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| 9 | * |
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| 10 | * This program is distributed in the hope that it will be useful, |
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| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 13 | * GNU General Public License for more details. |
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| 14 | * |
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| 15 | * You should have received a copy of the GNU General Public License |
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| 16 | * along with this program; if not, write to the Free Software |
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| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 18 | */ |
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| 19 | |
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| 20 | |
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| 21 | #ifndef SCAN_DEPEND |
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| 22 | #include <stdio.h> |
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| 23 | #include <fcntl.h> |
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| 24 | #include <unistd.h> |
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| 25 | #include <sys/ioctl.h> |
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| 26 | #include <linux/fd.h> |
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| 27 | #include <linux/fdreg.h> |
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| 28 | #endif |
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| 29 | |
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| 30 | #include "floppy.h" |
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| 31 | |
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| 32 | |
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| 33 | #define DISK_RETRY 4 |
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| 34 | #define RETRY2 10 |
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| 35 | |
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| 36 | static int rw_flag; |
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| 37 | static int fd[2] = {-1, -1}; |
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| 38 | static int drive_type[2]; |
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| 39 | |
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| 40 | #define IS_5_INCHES(drive) ((drive_type[drive]>0) && (drive_type[drive]<3)) |
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| 41 | |
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| 42 | #define SET_NO_MULTITRACK(lval) (lval &= ~0x80) |
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| 43 | #define SET_NO_MFM(lval) (lval &= ~0x40) |
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| 44 | |
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| 45 | |
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| 46 | |
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| 47 | /* ResetDrive: |
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| 48 | * Réinitialise le lecteur de disquettes. |
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| 49 | */ |
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| 50 | static void ResetDrive(int drive, int density) |
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| 51 | { |
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| 52 | struct floppy_struct fd_prm; |
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| 53 | |
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| 54 | fd_prm.head = (density == 1 ? 1 : 2); /* nr of heads */ |
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| 55 | fd_prm.track = (IS_5_INCHES(drive) ? 40 : 80); /* nr of tracks */ |
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| 56 | fd_prm.sect = (density == 1 ? 4 : 8); /* sectors per track (512-byte sector) */ |
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| 57 | fd_prm.size = fd_prm.head * fd_prm.track * fd_prm.sect; /* nr of sectors total */ |
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| 58 | fd_prm.stretch = 0; |
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| 59 | fd_prm.gap = 0x1B; |
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| 60 | fd_prm.rate = (density == 1 ? 0xB1 : 0x3A); /* cf /usr/include/linux/fd.h */ |
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| 61 | fd_prm.spec1 = 0xDF; |
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| 62 | fd_prm.fmt_gap = 0x2C; |
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| 63 | |
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| 64 | ioctl(fd[drive], FDSETPRM, &fd_prm); |
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| 65 | } |
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| 66 | |
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| 67 | |
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| 68 | |
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| 69 | /* OpenDrive: |
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| 70 | * Obtient le descripteur de fichier pour le lecteur de disquettes. |
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| 71 | */ |
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| 72 | static int OpenDrive(int drive, int density) |
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| 73 | { |
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| 74 | char dev_str[16]; |
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| 75 | |
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| 76 | snprintf(dev_str, sizeof(dev_str), "/dev/fd%d", drive); |
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| 77 | |
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| 78 | if (rw_flag) { |
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| 79 | if ((fd[drive]=open(dev_str, O_RDWR | O_NDELAY))>=0) |
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| 80 | goto success; |
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| 81 | } |
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| 82 | else { |
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| 83 | if ((fd[drive]=open(dev_str, O_RDONLY | O_NDELAY))>=0) |
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| 84 | goto success; |
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| 85 | } |
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| 86 | |
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| 87 | return 0; |
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| 88 | |
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| 89 | success: |
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| 90 | ResetDrive(drive, density); |
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| 91 | return 1; |
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| 92 | } |
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| 93 | |
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| 94 | |
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| 95 | |
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| 96 | /* ExecCommand: |
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| 97 | * Exécute la commande spécifiée via l'appel ioctl() FDRAWCMD. |
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| 98 | */ |
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| 99 | static int ExecCommand2(int drive, int density, struct floppy_raw_cmd *fd_cmd); |
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| 100 | |
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| 101 | static int ExecCommand(int drive,int density, struct floppy_raw_cmd *fd_cmd) { |
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| 102 | int i,ret; |
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| 103 | for (i=0;i<RETRY2;i++) { |
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| 104 | if ((ret=ExecCommand2(drive,density,fd_cmd))==0) return 0; |
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| 105 | ResetDrive(drive,density); |
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| 106 | } |
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| 107 | return ret; |
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| 108 | } |
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| 109 | |
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| 110 | static int ExecCommand2(int drive, int density, struct floppy_raw_cmd *fd_cmd) |
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| 111 | { |
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| 112 | int i, ret = 0; |
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| 113 | |
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| 114 | if (fd[drive]<0 && !OpenDrive(drive, density)) |
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| 115 | return 0x10; /* lecteur non prêt */ |
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| 116 | |
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| 117 | for (i=0; i<DISK_RETRY; i++) { |
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| 118 | ret=ioctl(fd[drive], FDRAWCMD, fd_cmd); |
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| 119 | |
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| 120 | if (ret >= 0) |
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| 121 | break; |
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| 122 | |
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| 123 | ResetDrive(drive, density); |
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| 124 | } |
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| 125 | |
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| 126 | if (ret<0) |
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| 127 | return 0x10; /* lecteur non prêt */ |
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| 128 | |
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| 129 | #ifdef DEBUG |
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| 130 | printf("fd_cmd reply: "); |
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| 131 | for (i=0; i<3; i++) |
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| 132 | printf("ST%d=%02x ", i, fd_cmd->reply[i]); |
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| 133 | printf("\n"); |
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| 134 | #endif |
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| 135 | |
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| 136 | switch (fd_cmd->reply[1]) { /* ST1 */ |
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| 137 | |
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| 138 | case 0x01: /* Missing Address Mark */ |
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| 139 | return 0x04; /* erreur sur l'adresse */ |
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| 140 | |
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| 141 | case 0x02: /* Write Protected */ |
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| 142 | return 0x01; /* disk protégé en écriture */ |
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| 143 | |
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| 144 | case 0x04: /* No Data - unreadable */ |
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| 145 | return 0x08; /* erreur sur les données */ |
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| 146 | |
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| 147 | case 0x20: /* CRC error in data or addr */ |
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| 148 | if (fd_cmd->reply[2]==0x20) |
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| 149 | return 0x08; /* erreur sur les données */ |
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| 150 | else |
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| 151 | return 0x04; /* erreur sur l'adresse */ |
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| 152 | |
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| 153 | default: |
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| 154 | return 0; /* OK */ |
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| 155 | } |
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| 156 | } |
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| 157 | |
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| 158 | |
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| 159 | |
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| 160 | /* FloppyReadSector: |
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| 161 | * Lit le secteur spécifié sur la disquette. |
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| 162 | */ |
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| 163 | int FloppyReadSector(int drive, int density, int track, int sector, int nsects, unsigned char data[]) |
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| 164 | { |
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| 165 | struct floppy_raw_cmd fd_cmd; |
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| 166 | int pc_drive = drive/2; |
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| 167 | |
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| 168 | /* paramètres de commande */ |
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| 169 | fd_cmd.flags = FD_RAW_READ | FD_RAW_INTR | FD_RAW_NEED_SEEK; |
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| 170 | fd_cmd.data = data; |
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| 171 | fd_cmd.length = (density == 1 ? 128 : 256)*nsects; /* buffer length */ |
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| 172 | fd_cmd.rate = IS_5_INCHES(pc_drive) ? 1 : 2; |
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| 173 | fd_cmd.track = IS_5_INCHES(pc_drive) ? track*2 : track; /* physical cylinder */ |
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| 174 | |
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| 175 | fd_cmd.cmd[0] = FD_READ; |
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| 176 | fd_cmd.cmd[1] = (drive%2) << 2; /* physical head */ |
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| 177 | fd_cmd.cmd[2] = track; /* logical cylinder */ |
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| 178 | fd_cmd.cmd[3] = 0; /* logical head */ |
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| 179 | fd_cmd.cmd[4] = sector; |
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| 180 | fd_cmd.cmd[5] = density - 1; /* sector size = 128*2^n */ |
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| 181 | fd_cmd.cmd[6] = 16; /* num sectors */ |
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| 182 | fd_cmd.cmd[7] = 0x1B; /* gap */ |
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| 183 | fd_cmd.cmd[8] = 0xFF; |
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| 184 | fd_cmd.cmd_count = 9; |
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| 185 | |
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| 186 | SET_NO_MULTITRACK(fd_cmd.cmd[0]); |
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| 187 | |
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| 188 | if (density == 1) |
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| 189 | SET_NO_MFM(fd_cmd.cmd[0]); /* FM coding */ |
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| 190 | |
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| 191 | return ExecCommand(pc_drive, density, &fd_cmd); |
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| 192 | } |
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| 193 | |
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| 194 | |
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| 195 | |
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| 196 | /* FloppyWriteSector: |
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| 197 | * Ecrit le secteur spécifié sur la disquette. |
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| 198 | */ |
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| 199 | int FloppyWriteSector(int drive, int density, int track, int sector, int nsects, const unsigned char data[]) |
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| 200 | { |
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| 201 | struct floppy_raw_cmd fd_cmd; |
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| 202 | int pc_drive = drive/2; |
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| 203 | |
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| 204 | /* paramètres de commande */ |
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| 205 | fd_cmd.flags = FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_NEED_SEEK; |
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| 206 | fd_cmd.data = (unsigned char *)data; |
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| 207 | fd_cmd.length = (density == 1 ? 128 : 256)*nsects; /* buffer length */ |
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| 208 | fd_cmd.rate = IS_5_INCHES(pc_drive) ? 1 : 2; |
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| 209 | fd_cmd.track = IS_5_INCHES(pc_drive) ? track*2 : track; /* physical cylinder */ |
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| 210 | |
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| 211 | fd_cmd.cmd[0] = FD_WRITE; |
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| 212 | fd_cmd.cmd[1] = (drive%2) << 2; /* physical head */ |
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| 213 | fd_cmd.cmd[2] = track; /* logical cylinder */ |
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| 214 | fd_cmd.cmd[3] = 0; /* logical head */ |
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| 215 | fd_cmd.cmd[4] = sector; |
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| 216 | fd_cmd.cmd[5] = density - 1; /* sector size = 128*2^n */ |
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| 217 | fd_cmd.cmd[6] = 16; /* num sectors */ |
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| 218 | fd_cmd.cmd[7] = 0x1B; /* gap */ |
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| 219 | fd_cmd.cmd[8] = 0xFF; |
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| 220 | fd_cmd.cmd_count = 9; |
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| 221 | |
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| 222 | SET_NO_MULTITRACK(fd_cmd.cmd[0]); |
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| 223 | |
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| 224 | if (density == 1) |
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| 225 | SET_NO_MFM(fd_cmd.cmd[0]); /* FM coding */ |
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| 226 | |
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| 227 | return ExecCommand(pc_drive, density, &fd_cmd); |
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| 228 | } |
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| 229 | |
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| 230 | |
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| 231 | |
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| 232 | /* FloppyFormatTrack: |
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| 233 | * Formate la piste en utilisant la table des headers spécifiée. |
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| 234 | */ |
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| 235 | int FloppyFormatTrack(int drive, int density, int track, const unsigned char header_table[]) |
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| 236 | { |
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| 237 | struct floppy_raw_cmd fd_cmd; |
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| 238 | int pc_drive = drive/2; |
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| 239 | |
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| 240 | /* paramètres de commande */ |
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| 241 | fd_cmd.flags = FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_NEED_SEEK; |
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| 242 | fd_cmd.data = (unsigned char *)header_table; |
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| 243 | fd_cmd.length = 64; |
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| 244 | fd_cmd.rate = IS_5_INCHES(pc_drive) ? 1 : 2; |
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| 245 | fd_cmd.track = IS_5_INCHES(pc_drive) ? track*2 : track; /* physical cylinder */ |
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| 246 | |
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| 247 | fd_cmd.cmd[0] = FD_FORMAT; |
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| 248 | fd_cmd.cmd[1] = (drive%2) << 2; |
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| 249 | fd_cmd.cmd[2] = density - 1; /* sector size = 128*2^n */ |
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| 250 | fd_cmd.cmd[3] = 16; /* num sectors */ |
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| 251 | fd_cmd.cmd[4] = 0x2C; |
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| 252 | fd_cmd.cmd[5] = 0xE5; /* filler_byte */ |
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| 253 | fd_cmd.cmd_count = 6; |
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| 254 | |
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| 255 | SET_NO_MULTITRACK(fd_cmd.cmd[0]); /* nop */ |
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| 256 | |
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| 257 | if (density == 1) |
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| 258 | SET_NO_MFM(fd_cmd.cmd[0]); /* FM coding */ |
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| 259 | |
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| 260 | return ExecCommand(pc_drive, density, &fd_cmd); |
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| 261 | } |
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| 262 | |
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| 263 | |
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| 264 | |
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| 265 | /* FloppyInit: |
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| 266 | * Initialise le module de lecture de disquettes. |
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| 267 | */ |
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| 268 | int FloppyInit(struct floppy_info *fi, int enable_write_support) |
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| 269 | { |
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| 270 | struct floppy_drive_params fd_params; |
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| 271 | char dev_str[16]; |
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| 272 | int i, num_drives = 0; |
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| 273 | |
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| 274 | for (i=0; i<2; i++) { |
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| 275 | /* get drive type */ |
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| 276 | snprintf(dev_str, sizeof(dev_str), "/dev/fd%d", i); |
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| 277 | |
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| 278 | if ((fd[i]=open(dev_str, O_RDONLY | O_NDELAY))<0) { |
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| 279 | drive_type[i] = 0; |
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| 280 | fi->drive_type[2*i] = 0; |
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| 281 | fi->drive_type[2*i+1] = 0; |
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| 282 | } |
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| 283 | else { |
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| 284 | ioctl(fd[i], FDGETDRVPRM, &fd_params); |
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| 285 | close(fd[i]); |
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| 286 | fd[i] = -1; |
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| 287 | |
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| 288 | if (fd_params.cmos > 6) { |
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| 289 | drive_type[i] = 0; |
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| 290 | fi->drive_type[2*i] = 0; |
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| 291 | fi->drive_type[2*i+1] = 0; |
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| 292 | } |
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| 293 | else { |
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| 294 | drive_type[i] = fd_params.cmos; |
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| 295 | fi->drive_type[2*i] = fd_params.cmos; |
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| 296 | fi->drive_type[2*i+1] = fd_params.cmos; |
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| 297 | } |
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| 298 | |
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| 299 | num_drives++; |
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| 300 | } |
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| 301 | } |
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| 302 | |
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| 303 | fi->num_drives = num_drives; |
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| 304 | fi->fm_support = 1; |
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| 305 | fi->write_support = enable_write_support; |
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| 306 | |
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| 307 | rw_flag = enable_write_support; |
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| 308 | |
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| 309 | return num_drives; |
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| 310 | } |
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| 311 | |
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| 312 | |
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| 313 | |
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| 314 | /* FloppyExit: |
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| 315 | * Met au repos le module de lecture de disquettes. |
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| 316 | */ |
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| 317 | void FloppyExit(void) |
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| 318 | { |
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| 319 | int i; |
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| 320 | |
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| 321 | for (i=0; i<2; i++) { |
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| 322 | if (fd[i] >= 0) { |
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| 323 | close(fd[i]); |
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| 324 | fd[i] = -1; |
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| 325 | } |
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| 326 | } |
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| 327 | } |
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| 328 | |
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