root / proj / src / interrupts_func.c @ 195
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| 1 | 178 | up20180642 | #include <lcom/lcf.h> |
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| 2 | |||
| 3 | 154 | up20180655 | #include "interrupts_func.h" |
| 4 | #include "timer.h" |
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| 5 | #include "i8254.h" |
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| 6 | #include "kbc_macros.h" |
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| 7 | #include "keyboard.h" |
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| 8 | #include "mouse.h" |
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| 9 | #include "utils.h" |
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| 10 | #include "errors.h" |
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| 11 | |||
| 12 | static int timer_subscribed = 0, timer_id; |
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| 13 | |||
| 14 | static int keyboard_subscribed = 0, kbc_id; |
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| 15 | |||
| 16 | static int mouse_subscribed = 0, mouse_id; |
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| 17 | |||
| 18 | static void (*const ih[])(void) = { timer_int_handler, |
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| 19 | kbc_ih, |
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| 20 | NULL,
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| 21 | NULL,
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| 22 | NULL,
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| 23 | NULL,
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| 24 | NULL,
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| 25 | NULL,
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| 26 | NULL,
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| 27 | NULL,
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| 28 | NULL,
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| 29 | NULL,
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| 30 | mouse_ih, |
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| 31 | NULL,
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| 32 | NULL,
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| 33 | NULL,
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| 34 | NULL,
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| 35 | NULL,
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| 36 | NULL,
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| 37 | NULL,
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| 38 | NULL,
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| 39 | NULL,
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| 40 | NULL,
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| 41 | NULL,
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| 42 | NULL,
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| 43 | NULL,
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| 44 | NULL,
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| 45 | NULL,
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| 46 | NULL,
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| 47 | NULL,
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| 48 | NULL,
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| 49 | NULL,
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| 50 | }; |
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| 51 | |||
| 52 | int (subscribe_all)(void) { |
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| 53 | |||
| 54 | /// Timer interrupt handling
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| 55 | timer_id = 0;
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| 56 | if(subscribe_timer_interrupt(TIMER0_IRQ, &timer_id)) {
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| 57 | printf("%s: failed to subscribe timer interrupts.\n", __func__);
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| 58 | return SBCR_ERROR;
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| 59 | } |
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| 60 | timer_subscribed = 1;
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| 61 | |||
| 62 | /// Keyboard interrupt handling
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| 63 | kbc_id = 0;
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| 64 | if (subscribe_kbc_interrupt(KBC_IRQ, &kbc_id)) {
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| 65 | printf("%s: failed to subscribe keyboard interrupts.\n", __func__);
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| 66 | if (unsubscribe_all())
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| 67 | printf("%s: failed to unsubcribe driver, unexpected behaviour is expected.\n");
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| 68 | return SBCR_ERROR;
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| 69 | } |
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| 70 | keyboard_subscribed = 1;
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| 71 | |||
| 72 | /// Mouse interrupt handling
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| 73 | mouse_id = 0;
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| 74 | if (subscribe_mouse_interrupt(MOUSE_IRQ, &mouse_id)) { // subscribes mouse interrupts in exclusive mode |
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| 75 | printf("%s: failed to subscribe mouse interrupts.\n", __func__);
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| 76 | if (unsubscribe_all())
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| 77 | printf("%s: failed to unsubcribe driver, unexpected behaviour is expected.\n");
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| 78 | return SBCR_ERROR;
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| 79 | } |
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| 80 | mouse_subscribed = 1;
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| 81 | if (sys_irqdisable(&mouse_id)) { // temporarily disables our interrupts notifications |
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| 82 | printf("%s: failed to disable mouse interrupts.\n", __func__);
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| 83 | if (unsubscribe_all())
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| 84 | printf("%s: failed to unsubcribe driver, unexpected behaviour is expected.\n");
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| 85 | return SBCR_ERROR;
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| 86 | } |
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| 87 | if (mouse_set_data_report(true)) { // enables mouse data reporting |
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| 88 | printf("%s: failed to enable mouse data reporting.\n", __func__);
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| 89 | if (unsubscribe_all())
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| 90 | printf("%s: failed to unsubcribe driver, unexpected behaviour is expected.\n");
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| 91 | return SBCR_ERROR;
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| 92 | } |
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| 93 | if (sys_irqenable(&mouse_id)) { // re-enables our interrupts notifications |
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| 94 | printf("%s: failed to enable mouse interrupts.\n", __func__);
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| 95 | if (unsubscribe_all())
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| 96 | printf("%s: failed to unsubcribe driver, unexpected behaviour is expected.\n");
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| 97 | return SBCR_ERROR;
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| 98 | } |
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| 99 | |||
| 100 | return SUCCESS;
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| 101 | } |
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| 102 | |||
| 103 | int (unsubscribe_all)(void) { |
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| 104 | int r = SUCCESS;
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| 105 | |||
| 106 | // Unsubscribe Timer Interrupts
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| 107 | if (timer_subscribed) {
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| 108 | if (unsubscribe_interrupt(&timer_id)) {
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| 109 | printf("%s: failed to unsubcribe timer interrupts.\n");
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| 110 | r = UNSBCR_ERROR; |
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| 111 | } |
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| 112 | timer_subscribed = 0;
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| 113 | } |
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| 114 | |||
| 115 | // Unsubscribe Keyboard interrupts
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| 116 | if (keyboard_subscribed) {
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| 117 | if (unsubscribe_interrupt(&kbc_id)) {
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| 118 | printf("%s: failed to unsubcribe keyboard interrupts.\n");
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| 119 | r = UNSBCR_ERROR; |
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| 120 | } |
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| 121 | keyboard_subscribed = 0;
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| 122 | } |
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| 123 | |||
| 124 | // Unsubscribe Mouse Interrupts
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| 125 | if (mouse_subscribed) {
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| 126 | if (sys_irqdisable(&mouse_id)) { // temporarily disables our interrupts notifications |
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| 127 | printf("%s: failed to disable mouse interrupts.\n");
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| 128 | r = UNSBCR_ERROR; |
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| 129 | } |
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| 130 | if (mouse_set_data_report(false)) { // disables mouse data reporting |
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| 131 | printf("%s: failed to disable mouse data reporting.\n");
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| 132 | r = UNSBCR_ERROR; |
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| 133 | } |
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| 134 | if (sys_irqenable(&mouse_id)) { // re-enables our interrupts notifications |
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| 135 | printf("%s: failed to enable mouse interrupts.\n");
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| 136 | r = UNSBCR_ERROR; |
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| 137 | } |
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| 138 | if (unsubscribe_interrupt(&mouse_id)) { // unsubscribes interrupts |
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| 139 | printf("%s: failed to unsubcribe mouse interrupts.\n");
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| 140 | r = UNSBCR_ERROR; |
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| 141 | } |
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| 142 | mouse_subscribed = 0;
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| 143 | } |
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| 144 | |||
| 145 | return r;
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| 146 | } |
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| 147 | |||
| 148 | void interrupt_handler(uint8_t handler) {
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| 149 | if (handler >= 32) return; |
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| 150 | if ((*ih[handler]) == NULL) return; |
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| 151 | (*ih[handler])(); |
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| 152 | } |