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1 #ifndef _LINUX_FDREG_H |
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2 #define _LINUX_FDREG_H |
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3 /* |
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4 * This file contains some defines for the floppy disk controller. |
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5 * Various sources. Mostly "IBM Microcomputers: A Programmers |
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6 * Handbook", Sanches and Canton. |
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7 */ |
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8 |
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9 #ifdef FDPATCHES |
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10 #define FD_IOPORT fdc_state[fdc].address |
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11 #else |
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12 /* It would be a lot saner just to force fdc_state[fdc].address to always |
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13 be set ! FIXME */ |
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14 #define FD_IOPORT 0x3f0 |
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15 #endif |
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16 |
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17 /* Fd controller regs. S&C, about page 340 */ |
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18 #define FD_STATUS (4 + FD_IOPORT ) |
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19 #define FD_DATA (5 + FD_IOPORT ) |
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20 |
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21 /* Digital Output Register */ |
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22 #define FD_DOR (2 + FD_IOPORT ) |
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23 |
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24 /* Digital Input Register (read) */ |
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25 #define FD_DIR (7 + FD_IOPORT ) |
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26 |
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27 /* Diskette Control Register (write)*/ |
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28 #define FD_DCR (7 + FD_IOPORT ) |
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29 |
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30 /* Bits of main status register */ |
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31 #define STATUS_BUSYMASK 0x0F /* drive busy mask */ |
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32 #define STATUS_BUSY 0x10 /* FDC busy */ |
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33 #define STATUS_DMA 0x20 /* 0- DMA mode */ |
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34 #define STATUS_DIR 0x40 /* 0- cpu->fdc */ |
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35 #define STATUS_READY 0x80 /* Data reg ready */ |
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36 |
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37 /* Bits of FD_ST0 */ |
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38 #define ST0_DS 0x03 /* drive select mask */ |
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39 #define ST0_HA 0x04 /* Head (Address) */ |
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40 #define ST0_NR 0x08 /* Not Ready */ |
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41 #define ST0_ECE 0x10 /* Equipment check error */ |
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42 #define ST0_SE 0x20 /* Seek end */ |
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43 #define ST0_INTR 0xC0 /* Interrupt code mask */ |
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44 |
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45 /* Bits of FD_ST1 */ |
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46 #define ST1_MAM 0x01 /* Missing Address Mark */ |
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47 #define ST1_WP 0x02 /* Write Protect */ |
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48 #define ST1_ND 0x04 /* No Data - unreadable */ |
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49 #define ST1_OR 0x10 /* OverRun */ |
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50 #define ST1_CRC 0x20 /* CRC error in data or addr */ |
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51 #define ST1_EOC 0x80 /* End Of Cylinder */ |
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52 |
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53 /* Bits of FD_ST2 */ |
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54 #define ST2_MAM 0x01 /* Missing Address Mark (again) */ |
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55 #define ST2_BC 0x02 /* Bad Cylinder */ |
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56 #define ST2_SNS 0x04 /* Scan Not Satisfied */ |
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57 #define ST2_SEH 0x08 /* Scan Equal Hit */ |
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58 #define ST2_WC 0x10 /* Wrong Cylinder */ |
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59 #define ST2_CRC 0x20 /* CRC error in data field */ |
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60 #define ST2_CM 0x40 /* Control Mark = deleted */ |
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61 |
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62 /* Bits of FD_ST3 */ |
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63 #define ST3_HA 0x04 /* Head (Address) */ |
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64 #define ST3_DS 0x08 /* drive is double-sided */ |
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65 #define ST3_TZ 0x10 /* Track Zero signal (1=track 0) */ |
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66 #define ST3_RY 0x20 /* drive is ready */ |
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67 #define ST3_WP 0x40 /* Write Protect */ |
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68 #define ST3_FT 0x80 /* Drive Fault */ |
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69 |
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70 /* Values for FD_COMMAND */ |
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71 #define FD_RECALIBRATE 0x07 /* move to track 0 */ |
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72 #define FD_SEEK 0x0F /* seek track */ |
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73 #define FD_READ 0xE6 /* read with MT, MFM, SKip deleted */ |
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74 #define FD_WRITE 0xC5 /* write with MT, MFM */ |
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75 #define FD_SENSEI 0x08 /* Sense Interrupt Status */ |
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76 #define FD_SPECIFY 0x03 /* specify HUT etc */ |
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77 #define FD_FORMAT 0x4D /* format one track */ |
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78 #define FD_VERSION 0x10 /* get version code */ |
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79 #define FD_CONFIGURE 0x13 /* configure FIFO operation */ |
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80 #define FD_PERPENDICULAR 0x12 /* perpendicular r/w mode */ |
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81 #define FD_GETSTATUS 0x04 /* read ST3 */ |
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82 #define FD_DUMPREGS 0x0E /* dump the contents of the fdc regs */ |
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83 #define FD_READID 0xEA /* prints the header of a sector */ |
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84 #define FD_UNLOCK 0x14 /* Fifo config unlock */ |
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85 #define FD_LOCK 0x94 /* Fifo config lock */ |
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86 #define FD_RSEEK_OUT 0x8f /* seek out (i.e. to lower tracks) */ |
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87 #define FD_RSEEK_IN 0xcf /* seek in (i.e. to higher tracks) */ |
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88 |
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89 /* the following commands are new in the 82078. They are not used in the |
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90 * floppy driver, except the first three. These commands may be useful for apps |
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91 * which use the FDRAWCMD interface. For doc, get the 82078 spec sheets at |
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92 * http://www-techdoc.intel.com/docs/periph/fd_contr/datasheets/ */ |
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93 |
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94 #define FD_PARTID 0x18 /* part id ("extended" version cmd) */ |
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95 #define FD_SAVE 0x2e /* save fdc regs for later restore */ |
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96 #define FD_DRIVESPEC 0x8e /* drive specification: Access to the |
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97 * 2 Mbps data transfer rate for tape |
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98 * drives */ |
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99 |
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100 #define FD_RESTORE 0x4e /* later restore */ |
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101 #define FD_POWERDOWN 0x27 /* configure FDC's powersave features */ |
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102 #define FD_FORMAT_N_WRITE 0xef /* format and write in one go. */ |
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103 #define FD_OPTION 0x33 /* ISO format (which is a clean way to |
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104 * pack more sectors on a track) */ |
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105 |
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106 /* DMA commands */ |
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107 #define DMA_READ 0x46 |
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108 #define DMA_WRITE 0x4A |
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109 |
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110 /* FDC version return types */ |
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111 #define FDC_NONE 0x00 |
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112 #define FDC_UNKNOWN 0x10 /* DO NOT USE THIS TYPE EXCEPT IF IDENTIFICATION |
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113 FAILS EARLY */ |
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114 #define FDC_8272A 0x20 /* Intel 8272a, NEC 765 */ |
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115 #define FDC_765ED 0x30 /* Non-Intel 1MB-compatible FDC, can't detect */ |
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116 #define FDC_82072 0x40 /* Intel 82072; 8272a + FIFO + DUMPREGS */ |
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117 #define FDC_82072A 0x45 /* 82072A (on Sparcs) */ |
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118 #define FDC_82077_ORIG 0x51 /* Original version of 82077AA, sans LOCK */ |
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119 #define FDC_82077 0x52 /* 82077AA-1 */ |
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120 #define FDC_82078_UNKN 0x5f /* Unknown 82078 variant */ |
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121 #define FDC_82078 0x60 /* 44pin 82078 or 64pin 82078SL */ |
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122 #define FDC_82078_1 0x61 /* 82078-1 (2Mbps fdc) */ |
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123 #define FDC_S82078B 0x62 /* S82078B (first seen on Adaptec AVA-2825 VLB |
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124 * SCSI/EIDE/Floppy controller) */ |
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125 #define FDC_87306 0x63 /* National Semiconductor PC 87306 */ |
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126 |
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127 /* |
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128 * Beware: the fdc type list is roughly sorted by increasing features. |
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129 * Presence of features is tested by comparing the FDC version id with the |
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130 * "oldest" version that has the needed feature. |
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131 * If during FDC detection, an obscure test fails late in the sequence, don't |
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132 * assign FDC_UNKNOWN. Else the FDC will be treated as a dumb 8272a, or worse. |
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133 * This is especially true if the tests are unneeded. |
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134 */ |
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135 |
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136 #define FD_RESET_DELAY 20 |
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137 #endif |