root / lab3 / kbc.c @ 64
History | View | Annotate | Download (1.77 KB)
| 1 | 30 | up20180655 | #include <lcom/lcf.h> |
|---|---|---|---|
| 2 | |||
| 3 | #include "kbc.h" |
||
| 4 | |||
| 5 | 60 | up20180642 | #include "kbc_macros.h" |
| 6 | #include "utils.h" |
||
| 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);
|
||
| 11 | } |
||
| 12 | |||
| 13 | 39 | up20180642 | int (kbc_read_cmd)(uint8_t *cmd){
|
| 14 | if(kbc_issue_cmd(READ_KBC_CMD)) return 1; |
||
| 15 | if(kbc_read_byte(cmd)) return 1; |
||
| 16 | return 0; |
||
| 17 | } |
||
| 18 | |||
| 19 | int (kbc_change_cmd)(uint8_t cmd){
|
||
| 20 | if(kbc_issue_cmd(WRITE_KBC_CMD)) return 1; |
||
| 21 | if(sys_outb(KBC_CMD_ARG, cmd)) return 1; |
||
| 22 | return 0; |
||
| 23 | } |
||
| 24 | |||
| 25 | 60 | up20180642 | int (kbc_restore_keyboard)(){
|
| 26 | 43 | up20180642 | uint8_t cmd = 0;
|
| 27 | if(kbc_read_cmd(&cmd)) return 1; |
||
| 28 | 60 | up20180642 | cmd = (cmd | INT_KBD) & (~DIS_KBD) ; |
| 29 | 43 | up20180642 | if(kbc_change_cmd(cmd)) return 1; |
| 30 | return 0; |
||
| 31 | } |
||
| 32 | |||
| 33 | 39 | up20180642 | int (kbc_issue_cmd)(uint8_t cmd){
|
| 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; |
||
| 39 | return 0; |
||
| 40 | } |
||
| 41 | tickdelay(micros_to_ticks(DELAY)); |
||
| 42 | } |
||
| 43 | return 1; |
||
| 44 | } |
||
| 45 | |||
| 46 | 61 | up20180642 | int (kbc_issue_arg)(uint8_t arg){
|
| 47 | uint8_t stat; |
||
| 48 | for(int i = 0; i < KBC_NUM_TRIES; ++i){ |
||
| 49 | if(util_sys_inb(STATUS_REG, &stat)) return 1; |
||
| 50 | if((stat&IN_BUF_FULL) == 0){ |
||
| 51 | if(sys_outb(KBC_CMD_ARG, arg)) return 1; |
||
| 52 | return 0; |
||
| 53 | } |
||
| 54 | tickdelay(micros_to_ticks(DELAY)); |
||
| 55 | } |
||
| 56 | return 1; |
||
| 57 | } |
||
| 58 | |||
| 59 | 39 | up20180642 | int (kbc_read_byte)(uint8_t *byte){
|
| 60 | 38 | up20180642 | uint8_t stat; |
| 61 | while(true){ |
||
| 62 | if(util_sys_inb(STATUS_REG, &stat)) return 1; |
||
| 63 | if((stat&OUT_BUF_FUL) && (stat&AUX_MOUSE)==0){ |
||
| 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; |
||
| 67 | 36 | up20180642 | } |
| 68 | tickdelay(micros_to_ticks(DELAY)); |
||
| 69 | } |
||
| 70 | } |