root / lab4 / kbc.c @ 191
History | View | Annotate | Download (2.19 KB)
| 1 | 59 | up20180642 | #include <lcom/lcf.h> |
|---|---|---|---|
| 2 | |||
| 3 | #include "kbc.h" |
||
| 4 | |||
| 5 | #include "kbc_macros.h" |
||
| 6 | 68 | up20180642 | #include "utils.h" |
| 7 | #include "errors.h" |
||
| 8 | 59 | up20180642 | |
| 9 | int (unsubscribe_interrupt)(int *interrupt_id) { |
||
| 10 | 68 | up20180642 | if (interrupt_id == NULL) return NULL_PTR; |
| 11 | if(sys_irqrmpolicy(interrupt_id)) return UNSBCR_ERROR; |
||
| 12 | return SUCCESS;
|
||
| 13 | 59 | up20180642 | } |
| 14 | |||
| 15 | int (kbc_read_cmd)(uint8_t *cmd){
|
||
| 16 | 68 | up20180642 | int ret = 0; |
| 17 | if((ret = kbc_issue_cmd(READ_KBC_CMD))) return ret; |
||
| 18 | if((ret = kbc_read_byte(cmd))) return ret; |
||
| 19 | return SUCCESS;
|
||
| 20 | 59 | up20180642 | } |
| 21 | |||
| 22 | int (kbc_change_cmd)(uint8_t cmd){
|
||
| 23 | 68 | up20180642 | int ret = 0; |
| 24 | if((ret = kbc_issue_cmd(WRITE_KBC_CMD))) return ret; |
||
| 25 | if((ret = kbc_issue_arg(cmd))) return ret; |
||
| 26 | return SUCCESS;
|
||
| 27 | 59 | up20180642 | } |
| 28 | |||
| 29 | int (kbc_restore_kbd)(){
|
||
| 30 | 68 | up20180642 | int ret = 0; |
| 31 | 59 | up20180642 | uint8_t cmd = 0;
|
| 32 | 68 | up20180642 | if((ret = kbc_read_cmd(&cmd))) return ret; |
| 33 | 79 | up20180655 | cmd = (cmd | INT_KBD) & (~DIS_KBD); |
| 34 | 68 | up20180642 | if((ret = kbc_change_cmd(cmd))) return ret; |
| 35 | return SUCCESS;
|
||
| 36 | 59 | up20180642 | } |
| 37 | |||
| 38 | int (kbc_issue_cmd)(uint8_t cmd){
|
||
| 39 | 68 | up20180642 | int ret = 0; |
| 40 | 59 | up20180642 | uint8_t stat; |
| 41 | for(int i = 0; i < KBC_NUM_TRIES; ++i){ |
||
| 42 | 68 | up20180642 | if((ret = util_sys_inb(STATUS_REG, &stat))) return ret; |
| 43 | 59 | up20180642 | if((stat&IN_BUF_FULL) == 0){ |
| 44 | 68 | up20180642 | if(sys_outb(KBC_CMD, cmd)) return WRITE_ERROR; |
| 45 | return SUCCESS;
|
||
| 46 | 59 | up20180642 | } |
| 47 | tickdelay(micros_to_ticks(DELAY)); |
||
| 48 | } |
||
| 49 | 68 | up20180642 | return TIMEOUT_ERROR;
|
| 50 | 59 | up20180642 | } |
| 51 | |||
| 52 | 68 | up20180642 | int (kbc_issue_arg)(uint8_t arg){
|
| 53 | int ret = 0; |
||
| 54 | uint8_t stat; |
||
| 55 | for(int i = 0; i < KBC_NUM_TRIES; ++i){ |
||
| 56 | if((ret = util_sys_inb(STATUS_REG, &stat))) return ret; |
||
| 57 | if((stat&IN_BUF_FULL) == 0){ |
||
| 58 | if(sys_outb(KBC_CMD_ARG, arg)) return WRITE_ERROR; |
||
| 59 | return SUCCESS;
|
||
| 60 | } |
||
| 61 | tickdelay(micros_to_ticks(DELAY)); |
||
| 62 | } |
||
| 63 | return TIMEOUT_ERROR;
|
||
| 64 | } |
||
| 65 | |||
| 66 | 59 | up20180642 | int (kbc_read_byte)(uint8_t *byte){
|
| 67 | 68 | up20180642 | int ret = 0; |
| 68 | 59 | up20180642 | uint8_t stat; |
| 69 | 68 | up20180642 | for(int i = 0; i < KBC_NUM_TRIES; ++i){ |
| 70 | 78 | up20180655 | if((ret = util_sys_inb(STATUS_REG, &stat))) return ret; |
| 71 | if((stat&OUT_BUF_FUL) && (stat&AUX_MOUSE)==0){ |
||
| 72 | if(stat & (PARITY_ERROR | TIME_OUT_REC)) return OTHER_ERROR; |
||
| 73 | 68 | up20180642 | if((ret = util_sys_inb(OUTPUT_BUF, byte))) return ret; |
| 74 | else return SUCCESS; |
||
| 75 | 59 | up20180642 | } |
| 76 | tickdelay(micros_to_ticks(DELAY)); |
||
| 77 | } |
||
| 78 | 72 | up20180642 | printf("Timing out\n");
|
| 79 | 68 | up20180642 | return TIMEOUT_ERROR;
|
| 80 | 59 | up20180642 | } |