#include "util.h" // dprintf
#include "biosvar.h" // GET_EBDA
#include "ps2port.h" // kbd_command
+#include "pic.h" // eoi_pic1
/****************************************************************
#define PS2_RET_ACK 0xfa
#define PS2_RET_NAK 0xfe
+static void
+process_ps2byte(u8 status, u8 data)
+{
+ if (!MODE16) {
+ // Don't pull in all of keyboard/mouse code into 32bit code -
+ // just discard the data.
+ dprintf(1, "Discarding ps2 data %x (status=%x)\n", data, status);
+ return;
+ }
+ if (status & I8042_STR_AUXDATA)
+ process_mouse(data);
+ else
+ process_key(data);
+}
+
static int
ps2_recvbyte(int aux, int needack, int timeout)
{
if (data == PS2_RET_ACK)
return data;
if (data == PS2_RET_NAK) {
- dprintf(1, "Got ps2 nak (status=%x); continuing\n", status);
+ dprintf(1, "Got ps2 nak (status=%x)\n", status);
return data;
}
}
- // This data not for us - XXX - just discard it for now.
- dprintf(1, "Discarding ps2 data %x (status=%x)\n", data, status);
+ // Data not part of this command.
+ process_ps2byte(status, data);
}
if (check_time(end)) {
ret = ps2_recvbyte(aux, 1, timeout);
if (ret < 0)
return ret;
+ if (ret != PS2_RET_ACK)
+ return -1;
return 0;
}
dprintf(2, "mouse command %x failed\n", command);
return ret;
}
+
+
+/****************************************************************
+ * IRQ handlers
+ ****************************************************************/
+
+static void
+process_ps2irq(void)
+{
+ u8 status = inb(PORT_PS2_STATUS);
+ if (!(status & I8042_STR_OBF)) {
+ dprintf(1, "ps2 irq but no data.\n");
+ return;
+ }
+ u8 data = inb(PORT_PS2_DATA);
+
+ process_ps2byte(status, data);
+}
+
+// INT74h : PS/2 mouse hardware interrupt
+void VISIBLE16
+handle_74(void)
+{
+ if (! CONFIG_PS2PORT)
+ return;
+
+ debug_isr(DEBUG_ISR_74);
+ process_ps2irq();
+ eoi_pic2();
+}
+
+// INT09h : Keyboard Hardware Service Entry Point
+void VISIBLE16
+handle_09(void)
+{
+ if (! CONFIG_PS2PORT)
+ return;
+
+ debug_isr(DEBUG_ISR_09);
+ process_ps2irq();
+ eoi_pic1();
+}
+
+
+/****************************************************************
+ * Setup
+ ****************************************************************/
+
+static void
+keyboard_init(void *data)
+{
+ /* flush incoming keys */
+ int ret = i8042_flush();
+ if (ret)
+ return;
+
+ // Controller self-test.
+ u8 param[2];
+ ret = i8042_command(I8042_CMD_CTL_TEST, param);
+ if (ret)
+ return;
+ if (param[0] != 0x55) {
+ dprintf(1, "i8042 self test failed (got %x not 0x55)\n", param[0]);
+ return;
+ }
+
+ // Controller keyboard test.
+ ret = i8042_command(I8042_CMD_KBD_TEST, param);
+ if (ret)
+ return;
+ if (param[0] != 0x00) {
+ dprintf(1, "i8042 keyboard test failed (got %x not 0x00)\n", param[0]);
+ return;
+ }
+
+ // Enable keyboard and mouse ports.
+ ret = i8042_command(I8042_CMD_KBD_ENABLE, NULL);
+ if (ret)
+ return;
+ ret = i8042_command(I8042_CMD_AUX_ENABLE, NULL);
+ if (ret)
+ return;
+
+
+ /* ------------------- keyboard side ------------------------*/
+ /* reset keyboard and self test (keyboard side) */
+ ret = kbd_command(ATKBD_CMD_RESET_BAT, param);
+ if (ret)
+ return;
+ if (param[0] != 0xaa) {
+ dprintf(1, "keyboard self test failed (got %x not 0xaa)\n", param[0]);
+ return;
+ }
+
+ /* Disable keyboard */
+ ret = kbd_command(ATKBD_CMD_RESET_DIS, NULL);
+ if (ret)
+ return;
+
+ // Set scancode command (mode 2)
+ param[0] = 0x02;
+ ret = kbd_command(ATKBD_CMD_SSCANSET, param);
+ if (ret)
+ return;
+
+ // Keyboard Mode: scan code convert, disable mouse, enable IRQ 1
+ SET_EBDA(ps2ctr, I8042_CTR_AUXDIS | I8042_CTR_XLATE | I8042_CTR_KBDINT);
+
+ /* Enable keyboard */
+ ret = kbd_command(ATKBD_CMD_ENABLE, NULL);
+ if (ret)
+ return;
+
+ dprintf(1, "keyboard initialized\n");
+}
+
+void
+ps2port_setup(void)
+{
+ if (! CONFIG_PS2PORT)
+ return;
+ dprintf(3, "init ps2port\n");
+
+ enable_hwirq(1, entry_09);
+ enable_hwirq(12, entry_74);
+
+ run_thread(keyboard_init, NULL);
+}