// Support for handling the PS/2 mouse/keyboard ports.
//
// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
-// Based on code Copyright (c) 1999-2004 Vojtech Pavlik
+// Several ideas taken from code Copyright (c) 1999-2004 Vojtech Pavlik
//
-// This file may be distributed under the terms of the GNU GPLv3 license.
+// This file may be distributed under the terms of the GNU LGPLv3 license.
#include "ioport.h" // inb
#include "util.h" // dprintf
#include "biosvar.h" // GET_EBDA
#include "ps2port.h" // kbd_command
+#include "pic.h" // eoi_pic1
/****************************************************************
i8042_flush(void)
{
dprintf(7, "i8042_flush\n");
- unsigned long flags = irq_save();
-
int i;
for (i=0; i<I8042_BUFFER_SIZE; i++) {
u8 status = inb(PORT_PS2_STATUS);
- if (! (status & I8042_STR_OBF)) {
- irq_restore(flags);
+ if (! (status & I8042_STR_OBF))
return 0;
- }
udelay(50);
u8 data = inb(PORT_PS2_DATA);
- dprintf(7, "i8042 flushed %x\n", data);
+ dprintf(7, "i8042 flushed %x (status=%x)\n", data, status);
}
- irq_restore(flags);
dprintf(1, "i8042 timeout on flush\n");
return -1;
}
i8042_command(int command, u8 *param)
{
dprintf(7, "i8042_command cmd=%x\n", command);
- unsigned long flags = irq_save();
int ret = __i8042_command(command, param);
- irq_restore(flags);
if (ret)
dprintf(2, "i8042 command %x failed\n", command);
return ret;
i8042_kbd_write(u8 c)
{
dprintf(7, "i8042_kbd_write c=%d\n", c);
- unsigned long flags = irq_save();
-
int ret = i8042_wait_write();
if (! ret)
outb(c, PORT_PS2_DATA);
-
- irq_restore(flags);
-
return ret;
}
#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)
{
u64 end = calc_future_tsc(timeout);
for (;;) {
- if (rdtscll() >= end) {
- dprintf(1, "ps2_recvbyte timeout\n");
- return -1;
- }
-
u8 status = inb(PORT_PS2_STATUS);
- if (! (status & I8042_STR_OBF))
- continue;
- u8 data = inb(PORT_PS2_DATA);
- dprintf(7, "ps2 read %x\n", data);
-
- if ((!!(status & I8042_STR_AUXDATA) != aux)
- || (needack && data != PS2_RET_ACK)) {
- // This data not for us - XXX - just discard it for now.
- dprintf(1, "Discarding ps2 data %x\n", data);
- continue;
+ if (status & I8042_STR_OBF) {
+ u8 data = inb(PORT_PS2_DATA);
+ dprintf(7, "ps2 read %x\n", data);
+
+ if (!!(status & I8042_STR_AUXDATA) == aux) {
+ if (!needack)
+ return data;
+ if (data == PS2_RET_ACK)
+ return data;
+ if (data == PS2_RET_NAK) {
+ dprintf(1, "Got ps2 nak (status=%x)\n", status);
+ return data;
+ }
+ }
+
+ // Data not part of this command.
+ process_ps2byte(status, data);
}
- return data;
+ if (check_time(end)) {
+ dprintf(1, "ps2_recvbyte timeout\n");
+ return -1;
+ }
+ yield();
}
}
static int
-ps2_sendbyte(int aux, u8 command)
+ps2_sendbyte(int aux, u8 command, int timeout)
{
dprintf(7, "ps2_sendbyte aux=%d cmd=%x\n", aux, command);
int ret;
return ret;
// Read ack.
- ret = ps2_recvbyte(aux, 1, 200);
+ ret = ps2_recvbyte(aux, 1, timeout);
if (ret < 0)
return ret;
+ if (ret != PS2_RET_ACK)
+ return -1;
return 0;
}
if (ret)
return ret;
- // Send command.
- ret = ps2_sendbyte(aux, command);
- if (ret)
- goto fail;
+ if (command == ATKBD_CMD_RESET_BAT) {
+ // Reset is special wrt timeouts.
- // Send parameters (if any).
- int i;
- for (i = 0; i < send; i++) {
- ret = ps2_sendbyte(aux, param[i]);
+ // Send command.
+ ret = ps2_sendbyte(aux, command, 1000);
if (ret)
goto fail;
- }
- // Receive parameters (if any).
- for (i = 0; i < receive; i++) {
- u8 data = ps2_recvbyte(aux, 0, 200);
- if (data < 0) {
- // On a receive timeout, return the item number that the
- // transfer failed on.
- ret = i + 1;
+ // Receive parameters.
+ ret = ps2_recvbyte(aux, 0, 4000);
+ if (ret < 0)
goto fail;
+ param[0] = ret;
+ ret = ps2_recvbyte(aux, 0, 100);
+ if (ret < 0)
+ // Some devices only respond with one byte on reset.
+ ret = 0;
+ param[1] = ret;
+ } else {
+ // Send command.
+ ret = ps2_sendbyte(aux, command, 200);
+ if (ret)
+ goto fail;
+
+ // Send parameters (if any).
+ int i;
+ for (i = 0; i < send; i++) {
+ ret = ps2_sendbyte(aux, param[i], 200);
+ if (ret)
+ goto fail;
+ }
+
+ // Receive parameters (if any).
+ for (i = 0; i < receive; i++) {
+ ret = ps2_recvbyte(aux, 0, 500);
+ if (ret < 0)
+ goto fail;
+ param[i] = ret;
}
- param[i] = data;
}
+ ret = 0;
+
fail:
// Restore interrupts and keyboard/mouse.
ret2 = i8042_command(I8042_CMD_CTL_WCTR, &ps2ctr);
dprintf(7, "kbd_command cmd=%x\n", command);
int ret = ps2_command(0, command, param);
if (ret)
- dprintf(2, "keyboard command %x failed (ret=%d)\n", command, ret);
+ dprintf(2, "keyboard command %x failed\n", command);
return ret;
}
dprintf(7, "aux_command cmd=%x\n", command);
int ret = ps2_command(1, command, param);
if (ret)
- dprintf(2, "mouse command %x failed (ret=%d)\n", command, ret);
+ 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);
+}
projects / seabios.git / blobdiff