root / lab4 / mouse.c @ 87
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| 1 | 59 | up20180642 | #include <lcom/lcf.h> |
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| 2 | |||
| 3 | #include "mouse.h" |
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| 4 | |||
| 5 | #include "errors.h" |
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| 6 | #include "kbc_macros.h" |
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| 7 | #include "mouse_macros.h" |
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| 8 | #include "kbc.h" |
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| 9 | |||
| 10 | int (subscribe_mouse_interrupt)(uint8_t interrupt_bit, int *interrupt_id) { |
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| 11 | if (interrupt_id == NULL) return NULL_PTR; |
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| 12 | *interrupt_id = interrupt_bit; |
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| 13 | if (sys_irqsetpolicy(MOUSE_IRQ, IRQ_REENABLE | IRQ_EXCLUSIVE, interrupt_id)) return SBCR_ERROR; |
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| 14 | return SUCCESS;
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| 15 | } |
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| 16 | |||
| 17 | int got_error_mouse_ih = 0; |
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| 18 | 80 | up20180642 | int counter_mouse_ih = 0; |
| 19 | 59 | up20180642 | |
| 20 | void (mouse_ih)(void) { |
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| 21 | uint8_t status = 0;
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| 22 | got_error_mouse_ih = 0;
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| 23 | 80 | up20180642 | if(counter_mouse_ih >= 3) counter_mouse_ih = 0; |
| 24 | 59 | up20180642 | |
| 25 | 68 | up20180642 | if ((got_error_mouse_ih = util_sys_inb(STATUS_REG, &status))) return; |
| 26 | 59 | up20180642 | |
| 27 | if (status & (TIME_OUT_REC | PARITY_ERROR)) {
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| 28 | 68 | up20180642 | got_error_mouse_ih = OTHER_ERROR; |
| 29 | 59 | up20180642 | return;
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| 30 | } |
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| 31 | 76 | up20180655 | if (((status & AUX_MOUSE) == 0) || ((status & OUT_BUF_FUL) == 0)) { |
| 32 | got_error_mouse_ih = OTHER_ERROR; |
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| 33 | return;
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| 34 | } |
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| 35 | 59 | up20180642 | |
| 36 | uint8_t byte = 0;
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| 37 | |||
| 38 | 68 | up20180642 | if ((got_error_mouse_ih = util_sys_inb(OUTPUT_BUF, &byte))) return; |
| 39 | 59 | up20180642 | |
| 40 | /// This does not run if: I was expecting the first one but what I get is definitely not the first byte
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| 41 | 80 | up20180642 | if((byte & FIRST_BYTE_ID) || counter_mouse_ih){
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| 42 | packet_mouse_ih[counter_mouse_ih] = byte; |
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| 43 | counter_mouse_ih++; |
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| 44 | 59 | up20180642 | } |
| 45 | } |
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| 46 | |||
| 47 | struct packet (mouse_parse_packet)(const uint8_t *packet_bytes){ |
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| 48 | struct packet pp;
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| 49 | pp.bytes[0] = packet_bytes[0]; |
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| 50 | pp.bytes[1] = packet_bytes[1]; |
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| 51 | pp.bytes[2] = packet_bytes[2]; |
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| 52 | pp.rb = pp.bytes[0] & RIGHT_BUTTON;
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| 53 | pp.mb = pp.bytes[0] & MIDDLE_BUTTON;
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| 54 | pp.lb = pp.bytes[0] & LEFT_BUTTON;
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| 55 | 71 | up20180655 | pp.delta_x = sign_extend_byte((packet_bytes[0] & MSB_X_DELTA) != 0, pp.bytes[1]); |
| 56 | pp.delta_y = sign_extend_byte((packet_bytes[0] & MSB_Y_DELTA) != 0, pp.bytes[2]); |
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| 57 | 59 | up20180642 | pp.x_ov = pp.bytes[0] & X_OVERFLOW;
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| 58 | pp.y_ov = pp.bytes[0] & Y_OVERFLOW;
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| 59 | return pp;
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| 60 | } |
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| 61 | |||
| 62 | 80 | up20180642 | int mouse_poll(struct packet *pp, uint16_t period){ |
| 63 | 77 | up20180642 | int ret = 0; |
| 64 | 80 | up20180642 | |
| 65 | uint8_t packet[3];
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| 66 | uint8_t byte; |
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| 67 | 82 | up20180642 | if ((ret = mouse_issue_cmd(READ_DATA))) return ret; |
| 68 | for(unsigned i = 0; i < 3; ++i){ |
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| 69 | if((ret = mouse_poll_byte(&byte, period))) return ret; |
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| 70 | packet[i] = byte; |
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| 71 | 77 | up20180642 | } |
| 72 | 80 | up20180642 | *pp = mouse_parse_packet(packet); |
| 73 | return SUCCESS;
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| 74 | 59 | up20180642 | } |
| 75 | 70 | up20180655 | |
| 76 | 80 | up20180642 | int (mouse_set_data_report)(int on){ |
| 77 | if(on) return mouse_issue_cmd(ENABLE_DATA_REP); |
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| 78 | else return mouse_issue_cmd( DIS_DATA_REP); |
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| 79 | } |
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| 80 | |||
| 81 | int (mouse_read_data)(uint8_t *data, uint16_t period) {
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| 82 | 70 | up20180655 | int ret;
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| 83 | if ((ret = mouse_issue_cmd(READ_DATA))) return ret; |
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| 84 | 80 | up20180642 | if ((ret = mouse_poll_byte(data, period))) return ret; |
| 85 | 70 | up20180655 | return SUCCESS;
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| 86 | } |
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| 87 | |||
| 88 | int (mouse_issue_cmd)(uint32_t cmd) {
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| 89 | int ret;
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| 90 | uint8_t ack = 0;
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| 91 | 78 | up20180655 | for (unsigned int i = 0; i < KBC_NUM_TRIES; i++) { |
| 92 | if ((ret = kbc_issue_cmd(MOUSE_WRITE_B))) return ret; |
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| 93 | if ((ret = kbc_issue_arg(cmd))) return ret; |
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| 94 | 87 | up20180655 | if ((ret = mouse_read_byte(&ack))) return ret; |
| 95 | 78 | up20180655 | |
| 96 | if (ack == ACK_OK) return SUCCESS; |
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| 97 | if (ack == ACK_ERROR) return INVALID_COMMAND; |
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| 98 | tickdelay(micros_to_ticks(DELAY)); |
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| 99 | } |
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| 100 | return TIMEOUT_ERROR;
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| 101 | 70 | up20180655 | } |
| 102 | |||
| 103 | int (mouse_read_byte)(uint8_t *byte) {
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| 104 | int ret = 0; |
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| 105 | uint8_t stat; |
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| 106 | for(int i = 0; i < KBC_NUM_TRIES; ++i){ |
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| 107 | if((ret = util_sys_inb(STATUS_REG, &stat))) return ret; |
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| 108 | if((stat&OUT_BUF_FUL) && (stat&AUX_MOUSE)) {
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| 109 | if(stat & (PARITY_ERROR | TIME_OUT_REC)) return OTHER_ERROR; |
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| 110 | if((ret = util_sys_inb(OUTPUT_BUF, byte))) return ret; |
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| 111 | else return SUCCESS; |
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| 112 | } |
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| 113 | tickdelay(micros_to_ticks(DELAY)); |
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| 114 | } |
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| 115 | return TIMEOUT_ERROR;
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| 116 | } |
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| 117 | 71 | up20180655 | |
| 118 | 80 | up20180642 | int (mouse_poll_byte)(uint8_t *byte, uint16_t period) {
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| 119 | int ret = 0; |
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| 120 | uint8_t stat; |
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| 121 | while(true){ |
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| 122 | if((ret = util_sys_inb(STATUS_REG, &stat))) return ret; |
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| 123 | if((stat&OUT_BUF_FUL) && (stat&AUX_MOUSE)) {
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| 124 | if(stat & (PARITY_ERROR | TIME_OUT_REC)) return OTHER_ERROR; |
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| 125 | if((ret = util_sys_inb(OUTPUT_BUF, byte))) return ret; |
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| 126 | else return SUCCESS; |
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| 127 | } |
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| 128 | 86 | up20180655 | tickdelay(micros_to_ticks(DELAY)); |
| 129 | 80 | up20180642 | } |
| 130 | } |
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| 131 | |||
| 132 | 71 | up20180655 | int16_t (sign_extend_byte)(uint8_t sign_bit, uint8_t byte) {
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| 133 | return (int16_t)(((0xFF * sign_bit)<<8) | byte); |
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| 134 | } |