root / lab3 / kbc_func.c @ 51
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| 1 | 47 | up20180642 | #include "kbc_func.h" |
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| 2 | #include "kbc.h" |
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| 3 | |||
| 4 | #include <lcom/lcf.h> |
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| 5 | |||
| 6 | int (subscribe_kbc_interrupt)(uint8_t interrupt_bit, int *interrupt_id) { |
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| 7 | if (interrupt_id == NULL) return 1; |
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| 8 | *interrupt_id = interrupt_bit; |
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| 9 | return (sys_irqsetpolicy(KBC_IRQ, IRQ_REENABLE | IRQ_EXCLUSIVE, interrupt_id));
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| 10 | } |
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| 11 | |||
| 12 | int (unsubscribe_interrupt)(int *interrupt_id) { |
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| 13 | if (interrupt_id == NULL) return 1; |
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| 14 | return sys_irqrmpolicy(interrupt_id);
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| 15 | } |
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| 16 | |||
| 17 | uint8_t scancode[2];
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| 18 | int got_error = 0; |
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| 19 | 49 | up20180655 | int done = 1; |
| 20 | 48 | up20180655 | int sz = 1; |
| 21 | 47 | up20180642 | |
| 22 | void (kbc_ih)(void) { |
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| 23 | 49 | up20180655 | |
| 24 | if(done) sz = 1; |
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| 25 | else sz++;
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| 26 | |||
| 27 | 47 | up20180642 | uint8_t status = 0;
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| 28 | got_error = 0;
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| 29 | |||
| 30 | if (util_sys_inb(STATUS_REG, &status)) {
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| 31 | got_error = 1;
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| 32 | return;
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| 33 | } |
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| 34 | |||
| 35 | if (status & (TIME_OUT_REC | PARITY_ERROR)) {
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| 36 | got_error = 1;
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| 37 | return;
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| 38 | } |
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| 39 | |||
| 40 | 50 | up20180655 | if ((status & OUT_BUF_FUL) == 0 || (status & AUX_MOUSE) != 0) { |
| 41 | got_error = 1;
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| 42 | return;
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| 43 | } |
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| 44 | |||
| 45 | 47 | up20180642 | uint8_t byte = 0;
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| 46 | |||
| 47 | if (util_sys_inb(OUTPUT_BUF, &byte)) {
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| 48 | got_error = 1;
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| 49 | return;
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| 50 | } |
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| 51 | |||
| 52 | 49 | up20180655 | scancode[sz-1] = byte;
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| 53 | done = !(TWO_BYTE_CODE == byte); |
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| 54 | 47 | up20180642 | |
| 55 | } |
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| 56 | |||
| 57 | int (kbd_poll)(uint8_t bytes[], uint8_t *size){
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| 58 | if(bytes == NULL || size == NULL) return 1; |
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| 59 | uint8_t c; |
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| 60 | if(kbc_read_byte(&c)) return 1; |
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| 61 | if(c == TWO_BYTE_CODE){
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| 62 | if(kbc_read_byte(&bytes[1])) return 1; |
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| 63 | bytes[0] = c;
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| 64 | *size = 2;
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| 65 | }else{
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| 66 | bytes[1] = 0; |
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| 67 | bytes[0] = c;
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| 68 | *size = 1;
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| 69 | } |
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| 70 | return 0; |
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| 71 | } |
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| 72 | |||
| 73 | int (kbc_read_cmd)(uint8_t *cmd){
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| 74 | if(kbc_issue_cmd(READ_KBC_CMD)) return 1; |
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| 75 | if(kbc_read_byte(cmd)) return 1; |
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| 76 | return 0; |
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| 77 | } |
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| 78 | |||
| 79 | int (kbc_change_cmd)(uint8_t cmd){
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| 80 | if(kbc_issue_cmd(WRITE_KBC_CMD)) return 1; |
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| 81 | 50 | up20180655 | if(kbc_issue_arg(cmd)) return 1; |
| 82 | 47 | up20180642 | return 0; |
| 83 | } |
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| 84 | |||
| 85 | int (kbc_restore_kbd)(){
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| 86 | uint8_t cmd = 0;
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| 87 | if(kbc_read_cmd(&cmd)) return 1; |
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| 88 | cmd = (cmd | INT_KBD) & (~DIS_KBD); |
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| 89 | if(kbc_change_cmd(cmd)) return 1; |
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| 90 | return 0; |
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| 91 | } |
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| 92 | |||
| 93 | int (kbc_issue_cmd)(uint8_t cmd){
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| 94 | uint8_t stat; |
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| 95 | for(int i = 0; i < KBC_NUM_TRIES; ++i){ |
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| 96 | if(util_sys_inb(STATUS_REG, &stat)) return 1; |
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| 97 | if((stat&IN_BUF_FULL) == 0){ |
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| 98 | if(sys_outb(KBC_CMD, cmd)) return 1; |
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| 99 | return 0; |
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| 100 | } |
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| 101 | tickdelay(micros_to_ticks(DELAY)); |
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| 102 | } |
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| 103 | return 1; |
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| 104 | } |
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| 105 | |||
| 106 | 50 | up20180655 | int (kbc_issue_arg)(uint8_t arg){
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| 107 | uint8_t stat; |
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| 108 | for(int i = 0; i < KBC_NUM_TRIES; ++i){ |
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| 109 | if(util_sys_inb(STATUS_REG, &stat)) return 1; |
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| 110 | if((stat&IN_BUF_FULL) == 0){ |
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| 111 | if(sys_outb(KBC_CMD_ARG, arg)) return 1; |
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| 112 | return 0; |
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| 113 | } |
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| 114 | tickdelay(micros_to_ticks(DELAY)); |
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| 115 | } |
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| 116 | return 1; |
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| 117 | } |
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| 118 | |||
| 119 | 47 | up20180642 | int (kbc_read_byte)(uint8_t *byte){
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| 120 | uint8_t stat; |
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| 121 | while(true){ |
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| 122 | if(util_sys_inb(STATUS_REG, &stat)) return 1; |
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| 123 | if((stat&OUT_BUF_FUL) && (stat&AUX_MOUSE)==0){ |
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| 124 | if(stat & (PARITY_ERROR | TIME_OUT_REC)) return 1; |
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| 125 | if(util_sys_inb(OUTPUT_BUF, byte)) return 1; |
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| 126 | else return 0; |
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| 127 | } |
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| 128 | tickdelay(micros_to_ticks(DELAY)); |
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| 129 | } |
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| 130 | } |