root / proj / libs / kbc / src / kbc.c @ 328
History | View | Annotate | Download (2 KB)
| 1 | 145 | up20180655 | #include <lcom/lcf.h> |
|---|---|---|---|
| 2 | |||
| 3 | #include "kbc.h" |
||
| 4 | |||
| 5 | #include "utils.h" |
||
| 6 | #include "errors.h" |
||
| 7 | |||
| 8 | int (kbc_read_cmd)(uint8_t *cmd){
|
||
| 9 | int ret = 0; |
||
| 10 | if((ret = kbc_issue_cmd(READ_KBC_CMD))) return ret; |
||
| 11 | if((ret = kbc_read_byte(cmd))) return ret; |
||
| 12 | return SUCCESS;
|
||
| 13 | } |
||
| 14 | |||
| 15 | int (kbc_change_cmd)(uint8_t cmd){
|
||
| 16 | int ret = 0; |
||
| 17 | if((ret = kbc_issue_cmd(WRITE_KBC_CMD))) return ret; |
||
| 18 | if((ret = kbc_issue_arg(cmd))) return ret; |
||
| 19 | return SUCCESS;
|
||
| 20 | } |
||
| 21 | 323 | up20180642 | /*
|
| 22 | static int (kbc_restore_kbd)(){
|
||
| 23 | 145 | up20180655 | int ret = 0;
|
| 24 | uint8_t cmd = 0;
|
||
| 25 | if((ret = kbc_read_cmd(&cmd))) return ret;
|
||
| 26 | cmd = (cmd | INT_KBD) & (~DIS_KBD);
|
||
| 27 | if((ret = kbc_change_cmd(cmd))) return ret;
|
||
| 28 | return SUCCESS;
|
||
| 29 | }
|
||
| 30 | 323 | up20180642 | */
|
| 31 | 145 | up20180655 | int (kbc_issue_cmd)(uint8_t cmd){
|
| 32 | int ret = 0; |
||
| 33 | uint8_t stat; |
||
| 34 | for(int i = 0; i < KBC_NUM_TRIES; ++i){ |
||
| 35 | if((ret = util_sys_inb(STATUS_REG, &stat))) return ret; |
||
| 36 | if((stat&IN_BUF_FULL) == 0){ |
||
| 37 | if(sys_outb(KBC_CMD, cmd)) return WRITE_ERROR; |
||
| 38 | return SUCCESS;
|
||
| 39 | } |
||
| 40 | tickdelay(micros_to_ticks(DELAY)); |
||
| 41 | } |
||
| 42 | return TIMEOUT_ERROR;
|
||
| 43 | } |
||
| 44 | |||
| 45 | int (kbc_issue_arg)(uint8_t arg){
|
||
| 46 | int ret = 0; |
||
| 47 | uint8_t stat; |
||
| 48 | for(int i = 0; i < KBC_NUM_TRIES; ++i){ |
||
| 49 | if((ret = util_sys_inb(STATUS_REG, &stat))) return ret; |
||
| 50 | if((stat&IN_BUF_FULL) == 0){ |
||
| 51 | if(sys_outb(KBC_CMD_ARG, arg)) return WRITE_ERROR; |
||
| 52 | return SUCCESS;
|
||
| 53 | } |
||
| 54 | tickdelay(micros_to_ticks(DELAY)); |
||
| 55 | } |
||
| 56 | return TIMEOUT_ERROR;
|
||
| 57 | } |
||
| 58 | |||
| 59 | int (kbc_read_byte)(uint8_t *byte){
|
||
| 60 | int ret = 0; |
||
| 61 | uint8_t stat; |
||
| 62 | for(int i = 0; i < KBC_NUM_TRIES; ++i){ |
||
| 63 | if((ret = util_sys_inb(STATUS_REG, &stat))) return ret; |
||
| 64 | if((stat&OUT_BUF_FUL) && (stat&AUX_MOUSE)==0){ |
||
| 65 | if(stat & (PARITY_ERROR | TIME_OUT_REC)) return OTHER_ERROR; |
||
| 66 | if((ret = util_sys_inb(OUTPUT_BUF, byte))) return ret; |
||
| 67 | else return SUCCESS; |
||
| 68 | } |
||
| 69 | tickdelay(micros_to_ticks(DELAY)); |
||
| 70 | } |
||
| 71 | printf("Timing out\n");
|
||
| 72 | return TIMEOUT_ERROR;
|
||
| 73 | } |