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seabios/src/mouse.c

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// 16bit code to handle mouse events.
//
// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
// Copyright (C) 2002 MandrakeSoft S.A.
//
// This file may be distributed under the terms of the GNU LGPLv3 license.
#include "biosvar.h" // GET_EBDA
#include "util.h" // debug_isr
#include "pic.h" // eoi_pic2
#include "bregs.h" // struct bregs
#include "ps2port.h" // aux_command
void
mouse_setup()
{
if (! CONFIG_PS2_MOUSE)
return;
dprintf(3, "init mouse\n");
// pointing device installed
SETBITS_BDA(equipment_list_flags, 0x04);
enable_hwirq(12, entry_74);
}
#define RET_SUCCESS 0x00
#define RET_EINVFUNCTION 0x01
#define RET_EINVINPUT 0x02
#define RET_EINTERFACE 0x03
#define RET_ENEEDRESEND 0x04
#define RET_ENOHANDLER 0x05
static int
disable_mouse(u16 ebda_seg)
{
u8 ps2ctr = GET_EBDA2(ebda_seg, ps2ctr);
ps2ctr |= I8042_CTR_AUXDIS;
ps2ctr &= ~I8042_CTR_AUXINT;
SET_EBDA2(ebda_seg, ps2ctr, ps2ctr);
return aux_command(PSMOUSE_CMD_DISABLE, NULL);
}
// Disable Mouse
static void
mouse_15c20000(struct bregs *regs)
{
u16 ebda_seg = get_ebda_seg();
int ret = disable_mouse(ebda_seg);
if (ret)
set_code_fail(regs, RET_ENEEDRESEND);
else
set_code_success(regs);
}
// Enable Mouse
static void
mouse_15c20001(struct bregs *regs)
{
u16 ebda_seg = get_ebda_seg();
u8 mouse_flags_2 = GET_EBDA2(ebda_seg, mouse_flag2);
if ((mouse_flags_2 & 0x80) == 0) {
set_code_fail(regs, RET_ENOHANDLER);
return;
}
u8 ps2ctr = GET_EBDA2(ebda_seg, ps2ctr);
ps2ctr &= ~I8042_CTR_AUXDIS;
ps2ctr |= I8042_CTR_AUXINT;
SET_EBDA2(ebda_seg, ps2ctr, ps2ctr);
int ret = aux_command(PSMOUSE_CMD_ENABLE, NULL);
if (ret)
set_code_fail(regs, RET_ENEEDRESEND);
else
set_code_success(regs);
}
static void
mouse_15c200XX(struct bregs *regs)
{
set_code_fail(regs, RET_EINVFUNCTION);
}
// Disable/Enable Mouse
static void
mouse_15c200(struct bregs *regs)
{
switch (regs->bh) {
case 0x00: mouse_15c20000(regs); break;
case 0x01: mouse_15c20001(regs); break;
default: mouse_15c200XX(regs); break;
}
}
// Reset Mouse
static void
mouse_15c201(struct bregs *regs)
{
u8 param[2];
int ret = aux_command(PSMOUSE_CMD_RESET_BAT, param);
if (ret != 0 && ret != 2) {
set_code_fail(regs, RET_ENEEDRESEND);
return;
}
regs->bl = param[0];
regs->bh = param[1];
set_code_success(regs);
}
// Set Sample Rate
static void
mouse_15c202(struct bregs *regs)
{
static u8 VAR16 sample_rates[7] = {10, 20, 40, 60, 80, 100, 200};
if (regs->bh >= ARRAY_SIZE(sample_rates)) {
set_code_fail(regs, RET_EINVINPUT);
return;
}
u8 mouse_data1 = GET_GLOBAL(sample_rates[regs->bh]);
int ret = aux_command(PSMOUSE_CMD_SETRATE, &mouse_data1);
if (ret)
set_code_fail(regs, RET_ENEEDRESEND);
else
set_code_success(regs);
}
// Set Resolution
static void
mouse_15c203(struct bregs *regs)
{
// BH:
// 0 = 25 dpi, 1 count per millimeter
// 1 = 50 dpi, 2 counts per millimeter
// 2 = 100 dpi, 4 counts per millimeter
// 3 = 200 dpi, 8 counts per millimeter
if (regs->bh >= 4) {
set_code_fail(regs, RET_EINVINPUT);
return;
}
u8 param = regs->bh;
int ret = aux_command(PSMOUSE_CMD_SETRES, &param);
if (ret)
set_code_fail(regs, RET_ENEEDRESEND);
else
set_code_success(regs);
}
// Get Device ID
static void
mouse_15c204(struct bregs *regs)
{
u8 param[2];
int ret = aux_command(PSMOUSE_CMD_GETID, param);
if (ret) {
set_code_fail(regs, RET_ENEEDRESEND);
return;
}
regs->bh = param[0];
set_code_success(regs);
}
// Initialize Mouse
static void
mouse_15c205(struct bregs *regs)
{
if (regs->bh != 3) {
set_code_fail(regs, RET_EINTERFACE);
return;
}
u16 ebda_seg = get_ebda_seg();
SET_EBDA2(ebda_seg, mouse_flag1, 0x00);
SET_EBDA2(ebda_seg, mouse_flag2, regs->bh);
// Reset Mouse
mouse_15c201(regs);
}
// Return Status
static void
mouse_15c20600(struct bregs *regs)
{
u8 param[3];
int ret = aux_command(PSMOUSE_CMD_GETINFO, param);
if (ret) {
set_code_fail(regs, RET_ENEEDRESEND);
return;
}
regs->bl = param[0];
regs->cl = param[1];
regs->dl = param[2];
set_code_success(regs);
}
// Set Scaling Factor to 1:1
static void
mouse_15c20601(struct bregs *regs)
{
int ret = aux_command(PSMOUSE_CMD_SETSCALE11, NULL);
if (ret)
set_code_fail(regs, RET_ENEEDRESEND);
else
set_code_success(regs);
}
// Set Scaling Factor to 2:1
static void
mouse_15c20602(struct bregs *regs)
{
int ret = aux_command(PSMOUSE_CMD_SETSCALE21, NULL);
if (ret)
set_code_fail(regs, RET_ENEEDRESEND);
else
set_code_success(regs);
}
static void
mouse_15c206XX(struct bregs *regs)
{
set_code_fail(regs, RET_EINVFUNCTION);
}
// Return Status & Set Scaling Factor...
static void
mouse_15c206(struct bregs *regs)
{
switch (regs->bh) {
case 0x00: mouse_15c20600(regs); break;
case 0x01: mouse_15c20601(regs); break;
case 0x02: mouse_15c20602(regs); break;
default: mouse_15c206XX(regs); break;
}
}
// Set Mouse Handler Address
static void
mouse_15c207(struct bregs *regs)
{
u32 farptr = (regs->es << 16) | regs->bx;
u16 ebda_seg = get_ebda_seg();
u8 mouse_flags_2 = GET_EBDA2(ebda_seg, mouse_flag2);
if (! farptr) {
/* remove handler */
if ((mouse_flags_2 & 0x80) != 0) {
mouse_flags_2 &= ~0x80;
disable_mouse(ebda_seg);
}
} else {
/* install handler */
mouse_flags_2 |= 0x80;
}
SET_EBDA2(ebda_seg, mouse_flag2, mouse_flags_2);
SET_EBDA2(ebda_seg, far_call_pointer, farptr);
set_code_success(regs);
}
static void
mouse_15c2XX(struct bregs *regs)
{
set_code_fail(regs, RET_EINVFUNCTION);
}
void
handle_15c2(struct bregs *regs)
{
//debug_stub(regs);
if (! CONFIG_PS2_MOUSE) {
set_code_fail(regs, RET_EUNSUPPORTED);
return;
}
irq_enable();
switch (regs->al) {
case 0x00: mouse_15c200(regs); break;
case 0x01: mouse_15c201(regs); break;
case 0x02: mouse_15c202(regs); break;
case 0x03: mouse_15c203(regs); break;
case 0x04: mouse_15c204(regs); break;
case 0x05: mouse_15c205(regs); break;
case 0x06: mouse_15c206(regs); break;
case 0x07: mouse_15c207(regs); break;
default: mouse_15c2XX(regs); break;
}
}
static void
process_mouse(u8 data)
{
u16 ebda_seg = get_ebda_seg();
u8 mouse_flags_1 = GET_EBDA2(ebda_seg, mouse_flag1);
u8 mouse_flags_2 = GET_EBDA2(ebda_seg, mouse_flag2);
if (! (mouse_flags_2 & 0x80))
// far call handler not installed
return;
u8 package_count = mouse_flags_2 & 0x07;
u8 index = mouse_flags_1 & 0x07;
SET_EBDA2(ebda_seg, mouse_data[index], data);
if ((index+1) < package_count) {
mouse_flags_1++;
SET_EBDA2(ebda_seg, mouse_flag1, mouse_flags_1);
return;
}
//BX_DEBUG_INT74("int74_function: make_farcall=1\n");
u16 status = GET_EBDA2(ebda_seg, mouse_data[0]);
u16 X = GET_EBDA2(ebda_seg, mouse_data[1]);
u16 Y = GET_EBDA2(ebda_seg, mouse_data[2]);
SET_EBDA2(ebda_seg, mouse_flag1, 0);
u32 func = GET_EBDA2(ebda_seg, far_call_pointer);
irq_enable();
asm volatile(
"pushl %0\n"
"pushw %w1\n" // status
"pushw %w2\n" // X
"pushw %w3\n" // Y
"pushw $0\n" // Z
"lcallw *8(%%esp)\n"
"addl $12, %%esp\n"
"cld\n"
:
: "r"(func), "r"(status), "r"(X), "r"(Y)
: "cc"
);
irq_disable();
}
// INT74h : PS/2 mouse hardware interrupt
void VISIBLE16
handle_74()
{
debug_isr(DEBUG_ISR_74);
if (! CONFIG_PS2_MOUSE)
goto done;
u8 v = inb(PORT_PS2_STATUS);
if ((v & (I8042_STR_OBF|I8042_STR_AUXDATA))
!= (I8042_STR_OBF|I8042_STR_AUXDATA)) {
dprintf(1, "mouse irq but no mouse data.\n");
goto done;
}
v = inb(PORT_PS2_DATA);
process_mouse(v);
done:
eoi_pic2();
}
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