mirror of
https://github.com/Mathewnd/Astral.git
synced 2026-10-27 12:48:22 +00:00
Matheus
118 lines
2.5 KiB
C
118 lines
2.5 KiB
C
#include <arch/ps2.h>
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#include <printf.h>
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#include <arch/ps2kbd.h>
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static bool reset_selftest(int port) {
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uint8_t r = RESEND;
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bool timeout = false;
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int attempts = 0;
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while (r == RESEND && attempts < 10) {
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device_command(port, DEVICE_CMD_RESETSELFTEST);
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r = read_data_timeout(5, &timeout);
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}
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if (attempts == 10)
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timeout = true;
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if (!timeout) {
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if (read_data() != DEVICE_SELFTEST_OK)
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printf("ps2: %s port device self test failed!\n", port == 1 ? "First" : "Second");
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else
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return true;
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}
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return false;
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}
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void arch_ps2_init() {
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// XXX actually check if the controller is there
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write_command(CTLR_CMD_DISABLEP1);
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write_command(CTLR_CMD_DISABLEP2);
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inb(PS2_PORT_DATA); // flush output buffer
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write_command(CTLR_CMD_READCFG);
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uint8_t control = read_data();
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bool dualport = control & CONFIG_CLOCKP2;
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control &= ~(CONFIG_IRQP1 | CONFIG_IRQP2 | CONFIG_TRANSLATION);
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write_command(CTLR_CMD_WRITECFG);
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write_data(control);
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write_command(CTLR_CMD_SELFTEST);
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if (read_data() != CTLR_SELFTEST_OK)
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printf("ps2: controller self test failed.\n");
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write_command(CTLR_CMD_WRITECFG);
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write_data(control); // restore config if it was reset
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// confirm existance of second port
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write_command(CTLR_CMD_ENABLEP2);
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write_command(CTLR_CMD_READCFG);
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control = read_data();
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if (dualport && (control & CONFIG_CLOCKP2)) // not enabled, not dual port.
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dualport = false;
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else
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write_command(CTLR_CMD_DISABLEP2); // disable second port again
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// self test ports
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int workingflag = 0;
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write_command(CTLR_CMD_P1SELFTEST);
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if (read_data() == 0)
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workingflag |= 1;
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else
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printf("First PS/2 port self test failed!\n");
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if (dualport) {
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write_command(CTLR_CMD_P2SELFTEST);
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if (read_data() == 0)
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workingflag |= 2;
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else
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printf("ps2: econd port self test failed!\n");
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}
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if (workingflag == 0) {
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printf("ps2: no working ports.\n");
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return;
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}
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printf("ps2: controller with %d ports\n", dualport ? 2 : 1);
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// enable ports
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write_command(CTLR_CMD_ENABLEP1);
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if (dualport)
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write_command(CTLR_CMD_ENABLEP2);
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// enable irqs and translation in config
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write_command(CTLR_CMD_READCFG);
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control = read_data();
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control |= (dualport ? CONFIG_IRQP1 | CONFIG_IRQP2 : CONFIG_IRQP1) | CONFIG_TRANSLATION;
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write_command(CTLR_CMD_WRITECFG);
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write_data(control);
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// reset and self test devices
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int connectedflag = 0;
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if (workingflag & 1 && reset_selftest(1))
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connectedflag |= 1;
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if (workingflag & 2 && reset_selftest(2))
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connectedflag |= 2;
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// XXX should id each one for proper identification
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if (connectedflag & 1)
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ps2kbd_init();
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}
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