| // 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) { |
| 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, ¶m); |
| 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); |
| |
| asm volatile( |
| "sti\n" |
| |
| "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" |
| |
| "cli\n" |
| "cld\n" |
| : |
| : "r"(func), "r"(status), "r"(X), "r"(Y) |
| : "cc" |
| ); |
| } |
| |
| // 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(); |
| } |