root / lab3 / kbc.c @ 254
History | View | Annotate | Download (2.13 KB)
| 1 |
#include <lcom/lcf.h> |
|---|---|
| 2 |
|
| 3 |
#include "kbc.h" |
| 4 |
|
| 5 |
#include "kbc_macros.h" |
| 6 |
#include "utils.h" |
| 7 |
#include "errors.h" |
| 8 |
|
| 9 |
int (unsubscribe_interrupt)(int *interrupt_id) { |
| 10 |
if (interrupt_id == NULL) return NULL_PTR; |
| 11 |
if(sys_irqrmpolicy(interrupt_id)) return UNSBCR_ERROR; |
| 12 |
return SUCCESS;
|
| 13 |
} |
| 14 |
|
| 15 |
int (kbc_read_cmd)(uint8_t *cmd){
|
| 16 |
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 |
} |
| 21 |
|
| 22 |
int (kbc_change_cmd)(uint8_t cmd){
|
| 23 |
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 |
} |
| 28 |
|
| 29 |
int (kbc_restore_keyboard)(){
|
| 30 |
int ret = 0; |
| 31 |
uint8_t cmd = 0;
|
| 32 |
if((ret = kbc_read_cmd(&cmd))) return ret; |
| 33 |
cmd = (cmd | INT_KBD) & (~DIS_KBD) ; |
| 34 |
if((ret = kbc_change_cmd(cmd))) return ret; |
| 35 |
return SUCCESS;
|
| 36 |
} |
| 37 |
|
| 38 |
int (kbc_issue_cmd)(uint8_t cmd){
|
| 39 |
int ret = 0; |
| 40 |
uint8_t stat; |
| 41 |
for(int i = 0; i < KBC_NUM_TRIES; ++i){ |
| 42 |
if((ret = util_sys_inb(STATUS_REG, &stat))) return ret; |
| 43 |
if((stat&IN_BUF_FULL) == 0){ |
| 44 |
if(sys_outb(KBC_CMD, cmd)) return WRITE_ERROR; |
| 45 |
return SUCCESS;
|
| 46 |
} |
| 47 |
tickdelay(micros_to_ticks(DELAY)); |
| 48 |
} |
| 49 |
return TIMEOUT_ERROR;
|
| 50 |
} |
| 51 |
|
| 52 |
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 |
int (kbc_read_byte)(uint8_t *byte){
|
| 67 |
int ret = 0; |
| 68 |
uint8_t stat; |
| 69 |
while(true){ |
| 70 |
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 1; |
| 73 |
if((ret = util_sys_inb(OUTPUT_BUF, byte))) return ret; |
| 74 |
else return SUCCESS; |
| 75 |
} |
| 76 |
tickdelay(micros_to_ticks(DELAY)); |
| 77 |
} |
| 78 |
return TIMEOUT_ERROR;
|
| 79 |
} |