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https://github.com/Mathewnd/Astral.git
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Matheus
120 lines
2.6 KiB
C
120 lines
2.6 KiB
C
#include <arch/ps2.h>
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#include <logging.h>
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#include <kernel/mouse.h>
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#define PS2_MOUSE_CMD_SAMPLERATE 0xF3
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#define PS2_MOUSE 0
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#define PS2_MOUSE_Z 3
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#define PS2_MOUSE_5B 4
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static bool haswheel = false;
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static bool fivebuttons = false;
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static void ps2_mouse_setrate(int port, uint8_t rate) {
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if (ps2_device_write_ok(port, PS2_MOUSE_CMD_SAMPLERATE) == false) {
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printf("ps2mouse: setting rate at port %d failed\n", port);
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}
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if (ps2_device_write_ok(port, rate) == false) {
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printf("ps2mouse: setting rate at port %d failed\n", port);
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}
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}
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static int datac;
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static uint8_t data[4];
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static inline bool enoughdata() {
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if (!((haswheel && datac == 4) || (haswheel == false && datac == 3)))
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return false;
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else
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return true;
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}
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static mouse_t *mouse;
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static void mouseisr() {
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data[datac] = inb(PS2_PORT_DATA);
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// check if the packet is bad
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if ((data[0] & 8) == 0) {
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datac = 0;
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return;
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}
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++datac;
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if (!enoughdata())
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return;
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mousepacket_t packet = {0};
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datac = 0;
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bool left = data[0] & 1;
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bool right = data[0] & 2;
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bool middle = data[0] & 4;
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bool b4 = data[3] & 0x10;
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bool b5 = data[3] & 0x20;
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packet.x = data[1] - (data[0] & 0x10 ? 0x100 : 0);
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packet.y = data[2] - (data[0] & 0x20 ? 0x100 : 0);
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packet.z = (data[3] & 0x7) * (data[3] & 0x8 ? -1 : 1);
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packet.flags |= left ? MOUSE_FLAG_LB : 0;
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packet.flags |= middle ? MOUSE_FLAG_MB : 0;
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packet.flags |= right ? MOUSE_FLAG_RB : 0;
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packet.flags |= b4 ? MOUSE_FLAG_B4 : 0;
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packet.flags |= b5 ? MOUSE_FLAG_B5 : 0;
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mouse_packet(mouse, &packet);
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}
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#define DO_IDENTIFY_CHECK(step) \
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if (ps2_identify(2, identity) == false) { \
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printf("ps2: ps2mouse_init: failed to identify mouse at port %d (step \"%s\")\n", port, step); \
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return; \
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}
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void ps2mouse_init() {
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int port = 2;
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uint8_t identity[2];
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DO_IDENTIFY_CHECK("first");
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if (identity[0] != PS2_MOUSE) {
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printf("Not a mouse!\n");
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return;
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}
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// check if mouse has scroll wheel
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ps2_mouse_setrate(2, 200);
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ps2_mouse_setrate(2, 100);
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ps2_mouse_setrate(2, 80);
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DO_IDENTIFY_CHECK("has scroll");
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if (identity[0] == PS2_MOUSE_Z) {
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haswheel = true;
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// check if mouse has 5 buttons
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ps2_mouse_setrate(2, 200);
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ps2_mouse_setrate(2, 200);
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ps2_mouse_setrate(2, 80);
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DO_IDENTIFY_CHECK("5 buttons");
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if (identity[0] == PS2_MOUSE_5B)
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fivebuttons = true;
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}
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ps2_mouse_setrate(2, 60);
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isr_t *isr = interrupt_allocate(mouseisr, arch_apic_eoi, IPL_MOUSE);
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__assert(isr);
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arch_ioapic_setirq(PS2_MOUSEIRQ, isr->id & 0xff, _cpu()->id, false);
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mouse = mouse_new();
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__assert(mouse);
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printf("ps2mouse: irq enabled with vector %u\n", isr->id & 0xff);
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printf("ps2mouse: wheel: %d five buttons: %d\n", haswheel, fivebuttons);
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}
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