root / lab3 / kbc.c @ 66
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| 1 | 30 | up20180655 | #include <lcom/lcf.h> |
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| 2 | |||
| 3 | #include "kbc.h" |
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| 4 | |||
| 5 | 60 | up20180642 | #include "kbc_macros.h" |
| 6 | #include "utils.h" |
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| 7 | 30 | up20180655 | |
| 8 | 60 | up20180642 | int (unsubscribe_interrupt)(int *interrupt_id) { |
| 9 | 30 | up20180655 | if (interrupt_id == NULL) return 1; |
| 10 | return sys_irqrmpolicy(interrupt_id);
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| 11 | } |
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| 12 | |||
| 13 | 39 | up20180642 | int (kbc_read_cmd)(uint8_t *cmd){
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| 14 | if(kbc_issue_cmd(READ_KBC_CMD)) return 1; |
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| 15 | if(kbc_read_byte(cmd)) return 1; |
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| 16 | return 0; |
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| 17 | } |
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| 18 | |||
| 19 | int (kbc_change_cmd)(uint8_t cmd){
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| 20 | if(kbc_issue_cmd(WRITE_KBC_CMD)) return 1; |
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| 21 | if(sys_outb(KBC_CMD_ARG, cmd)) return 1; |
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| 22 | return 0; |
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| 23 | } |
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| 24 | |||
| 25 | 60 | up20180642 | int (kbc_restore_keyboard)(){
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| 26 | 43 | up20180642 | uint8_t cmd = 0;
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| 27 | if(kbc_read_cmd(&cmd)) return 1; |
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| 28 | 60 | up20180642 | cmd = (cmd | INT_KBD) & (~DIS_KBD) ; |
| 29 | 43 | up20180642 | if(kbc_change_cmd(cmd)) return 1; |
| 30 | return 0; |
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| 31 | } |
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| 32 | |||
| 33 | 39 | up20180642 | int (kbc_issue_cmd)(uint8_t cmd){
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| 34 | 36 | up20180642 | uint8_t stat; |
| 35 | 40 | up20180642 | for(int i = 0; i < KBC_NUM_TRIES; ++i){ |
| 36 | 36 | up20180642 | if(util_sys_inb(STATUS_REG, &stat)) return 1; |
| 37 | 38 | up20180642 | if((stat&IN_BUF_FULL) == 0){ |
| 38 | if(sys_outb(KBC_CMD, cmd)) return 1; |
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| 39 | return 0; |
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| 40 | } |
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| 41 | tickdelay(micros_to_ticks(DELAY)); |
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| 42 | } |
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| 43 | return 1; |
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| 44 | } |
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| 45 | |||
| 46 | 61 | up20180642 | int (kbc_issue_arg)(uint8_t arg){
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| 47 | uint8_t stat; |
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| 48 | for(int i = 0; i < KBC_NUM_TRIES; ++i){ |
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| 49 | if(util_sys_inb(STATUS_REG, &stat)) return 1; |
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| 50 | if((stat&IN_BUF_FULL) == 0){ |
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| 51 | if(sys_outb(KBC_CMD_ARG, arg)) return 1; |
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| 52 | return 0; |
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| 53 | } |
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| 54 | tickdelay(micros_to_ticks(DELAY)); |
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| 55 | } |
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| 56 | return 1; |
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| 57 | } |
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| 58 | |||
| 59 | 39 | up20180642 | int (kbc_read_byte)(uint8_t *byte){
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| 60 | 38 | up20180642 | uint8_t stat; |
| 61 | while(true){ |
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| 62 | if(util_sys_inb(STATUS_REG, &stat)) return 1; |
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| 63 | if((stat&OUT_BUF_FUL) && (stat&AUX_MOUSE)==0){ |
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| 64 | 36 | up20180642 | if(stat & (PARITY_ERROR | TIME_OUT_REC)) return 1; |
| 65 | 38 | up20180642 | if(util_sys_inb(OUTPUT_BUF, byte)) return 1; |
| 66 | else return 0; |
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| 67 | 36 | up20180642 | } |
| 68 | tickdelay(micros_to_ticks(DELAY)); |
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| 69 | } |
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| 70 | } |