1 /* 2 * QEMU PS/2 Controller 3 * 4 * Copyright (c) 2003 Fabrice Bellard 5 * 6 * SPDX-License-Identifier: MIT 7 */ 8 #ifndef HW_INPUT_I8042_H 9 #define HW_INPUT_I8042_H 10 11 #include "hw/isa/isa.h" 12 #include "hw/sysbus.h" 13 #include "hw/input/ps2.h" 14 #include "qom/object.h" 15 16 #define I8042_KBD_IRQ 0 17 #define I8042_MOUSE_IRQ 1 18 19 typedef struct KBDState { 20 uint8_t write_cmd; /* if non zero, write data to port 60 is expected */ 21 uint8_t status; 22 uint8_t mode; 23 uint8_t outport; 24 uint32_t migration_flags; 25 uint32_t obsrc; 26 bool outport_present; 27 bool extended_state; 28 bool extended_state_loaded; 29 /* Bitmask of devices with data available. */ 30 uint8_t pending; 31 uint8_t obdata; 32 uint8_t cbdata; 33 uint8_t pending_tmp; 34 PS2KbdState ps2kbd; 35 PS2MouseState ps2mouse; 36 QEMUTimer *throttle_timer; 37 38 qemu_irq irqs[2]; 39 qemu_irq a20_out; 40 hwaddr mask; 41 } KBDState; 42 43 /* 44 * QEMU interface: 45 * + Named GPIO input "ps2-kbd-input-irq": set to 1 if the downstream PS2 46 * keyboard device has asserted its irq 47 * + Named GPIO input "ps2-mouse-input-irq": set to 1 if the downstream PS2 48 * mouse device has asserted its irq 49 * + Named GPIO output "a20": A20 line for x86 PCs 50 * + Unnamed GPIO output 0-1: i8042 output irqs for keyboard (0) or mouse (1) 51 */ 52 53 #define TYPE_I8042 "i8042" 54 OBJECT_DECLARE_SIMPLE_TYPE(ISAKBDState, I8042) 55 56 struct ISAKBDState { 57 ISADevice parent_obj; 58 59 KBDState kbd; 60 bool kbd_throttle; 61 MemoryRegion io[2]; 62 uint8_t kbd_irq; 63 uint8_t mouse_irq; 64 }; 65 66 /* 67 * QEMU interface: 68 * + sysbus MMIO region 0: MemoryRegion defining the command/status/data 69 * registers (access determined by mask property and access type) 70 * + Named GPIO input "ps2-kbd-input-irq": set to 1 if the downstream PS2 71 * keyboard device has asserted its irq 72 * + Named GPIO input "ps2-mouse-input-irq": set to 1 if the downstream PS2 73 * mouse device has asserted its irq 74 * + Unnamed GPIO output 0-1: i8042 output irqs for keyboard (0) or mouse (1) 75 */ 76 77 #define TYPE_I8042_MMIO "i8042-mmio" 78 OBJECT_DECLARE_SIMPLE_TYPE(MMIOKBDState, I8042_MMIO) 79 80 struct MMIOKBDState { 81 SysBusDevice parent_obj; 82 83 KBDState kbd; 84 uint32_t size; 85 MemoryRegion region; 86 }; 87 88 #define I8042_A20_LINE "a20" 89 90 91 void i8042_isa_mouse_fake_event(ISAKBDState *isa); 92 void i8042_setup_a20_line(ISADevice *dev, qemu_irq a20_out); 93 94 static inline bool i8042_present(void) 95 { 96 bool amb = false; 97 return object_resolve_path_type("", TYPE_I8042, &amb) || amb; 98 } 99 100 /* 101 * ACPI v2, Table 5-10 - Fixed ACPI Description Table Boot Architecture 102 * Flags, bit offset 1 - 8042. 103 */ 104 static inline uint16_t iapc_boot_arch_8042(void) 105 { 106 return i8042_present() ? 0x1 << 1 : 0x0 ; 107 } 108 109 #endif /* HW_INPUT_I8042_H */ 110