2 * QEMU PC keyboard emulation
4 * Copyright (c) 2003 Fabrice Bellard
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
30 /* debug PC keyboard */
33 #define DPRINTF(fmt, ...) \
34 do { printf("KBD: " fmt , ## __VA_ARGS__); } while (0)
36 #define DPRINTF(fmt, ...)
39 /* Keyboard Controller Commands */
40 #define KBD_CCMD_READ_MODE 0x20 /* Read mode bits */
41 #define KBD_CCMD_WRITE_MODE 0x60 /* Write mode bits */
42 #define KBD_CCMD_GET_VERSION 0xA1 /* Get controller version */
43 #define KBD_CCMD_MOUSE_DISABLE 0xA7 /* Disable mouse interface */
44 #define KBD_CCMD_MOUSE_ENABLE 0xA8 /* Enable mouse interface */
45 #define KBD_CCMD_TEST_MOUSE 0xA9 /* Mouse interface test */
46 #define KBD_CCMD_SELF_TEST 0xAA /* Controller self test */
47 #define KBD_CCMD_KBD_TEST 0xAB /* Keyboard interface test */
48 #define KBD_CCMD_KBD_DISABLE 0xAD /* Keyboard interface disable */
49 #define KBD_CCMD_KBD_ENABLE 0xAE /* Keyboard interface enable */
50 #define KBD_CCMD_READ_INPORT 0xC0 /* read input port */
51 #define KBD_CCMD_READ_OUTPORT 0xD0 /* read output port */
52 #define KBD_CCMD_WRITE_OUTPORT 0xD1 /* write output port */
53 #define KBD_CCMD_WRITE_OBUF 0xD2
54 #define KBD_CCMD_WRITE_AUX_OBUF 0xD3 /* Write to output buffer as if
55 initiated by the auxiliary device */
56 #define KBD_CCMD_WRITE_MOUSE 0xD4 /* Write the following byte to the mouse */
57 #define KBD_CCMD_DISABLE_A20 0xDD /* HP vectra only ? */
58 #define KBD_CCMD_ENABLE_A20 0xDF /* HP vectra only ? */
59 #define KBD_CCMD_PULSE_BITS_3_0 0xF0 /* Pulse bits 3-0 of the output port P2. */
60 #define KBD_CCMD_RESET 0xFE /* Pulse bit 0 of the output port P2 = CPU reset. */
61 #define KBD_CCMD_NO_OP 0xFF /* Pulse no bits of the output port P2. */
63 /* Keyboard Commands */
64 #define KBD_CMD_SET_LEDS 0xED /* Set keyboard leds */
65 #define KBD_CMD_ECHO 0xEE
66 #define KBD_CMD_GET_ID 0xF2 /* get keyboard ID */
67 #define KBD_CMD_SET_RATE 0xF3 /* Set typematic rate */
68 #define KBD_CMD_ENABLE 0xF4 /* Enable scanning */
69 #define KBD_CMD_RESET_DISABLE 0xF5 /* reset and disable scanning */
70 #define KBD_CMD_RESET_ENABLE 0xF6 /* reset and enable scanning */
71 #define KBD_CMD_RESET 0xFF /* Reset */
73 /* Keyboard Replies */
74 #define KBD_REPLY_POR 0xAA /* Power on reset */
75 #define KBD_REPLY_ACK 0xFA /* Command ACK */
76 #define KBD_REPLY_RESEND 0xFE /* Command NACK, send the cmd again */
78 /* Status Register Bits */
79 #define KBD_STAT_OBF 0x01 /* Keyboard output buffer full */
80 #define KBD_STAT_IBF 0x02 /* Keyboard input buffer full */
81 #define KBD_STAT_SELFTEST 0x04 /* Self test successful */
82 #define KBD_STAT_CMD 0x08 /* Last write was a command write (0=data) */
83 #define KBD_STAT_UNLOCKED 0x10 /* Zero if keyboard locked */
84 #define KBD_STAT_MOUSE_OBF 0x20 /* Mouse output buffer full */
85 #define KBD_STAT_GTO 0x40 /* General receive/xmit timeout */
86 #define KBD_STAT_PERR 0x80 /* Parity error */
88 /* Controller Mode Register Bits */
89 #define KBD_MODE_KBD_INT 0x01 /* Keyboard data generate IRQ1 */
90 #define KBD_MODE_MOUSE_INT 0x02 /* Mouse data generate IRQ12 */
91 #define KBD_MODE_SYS 0x04 /* The system flag (?) */
92 #define KBD_MODE_NO_KEYLOCK 0x08 /* The keylock doesn't affect the keyboard if set */
93 #define KBD_MODE_DISABLE_KBD 0x10 /* Disable keyboard interface */
94 #define KBD_MODE_DISABLE_MOUSE 0x20 /* Disable mouse interface */
95 #define KBD_MODE_KCC 0x40 /* Scan code conversion to PC format */
96 #define KBD_MODE_RFU 0x80
98 /* Output Port Bits */
99 #define KBD_OUT_RESET 0x01 /* 1=normal mode, 0=reset */
100 #define KBD_OUT_A20 0x02 /* x86 only */
101 #define KBD_OUT_OBF 0x10 /* Keyboard output buffer full */
102 #define KBD_OUT_MOUSE_OBF 0x20 /* Mouse output buffer full */
105 #define AUX_SET_SCALE11 0xE6 /* Set 1:1 scaling */
106 #define AUX_SET_SCALE21 0xE7 /* Set 2:1 scaling */
107 #define AUX_SET_RES 0xE8 /* Set resolution */
108 #define AUX_GET_SCALE 0xE9 /* Get scaling factor */
109 #define AUX_SET_STREAM 0xEA /* Set stream mode */
110 #define AUX_POLL 0xEB /* Poll */
111 #define AUX_RESET_WRAP 0xEC /* Reset wrap mode */
112 #define AUX_SET_WRAP 0xEE /* Set wrap mode */
113 #define AUX_SET_REMOTE 0xF0 /* Set remote mode */
114 #define AUX_GET_TYPE 0xF2 /* Get type */
115 #define AUX_SET_SAMPLE 0xF3 /* Set sample rate */
116 #define AUX_ENABLE_DEV 0xF4 /* Enable aux device */
117 #define AUX_DISABLE_DEV 0xF5 /* Disable aux device */
118 #define AUX_SET_DEFAULT 0xF6
119 #define AUX_RESET 0xFF /* Reset aux device */
120 #define AUX_ACK 0xFA /* Command byte ACK. */
122 #define MOUSE_STATUS_REMOTE 0x40
123 #define MOUSE_STATUS_ENABLED 0x20
124 #define MOUSE_STATUS_SCALE21 0x10
126 #define KBD_PENDING_KBD 1
127 #define KBD_PENDING_AUX 2
129 typedef struct KBDState {
130 uint8_t write_cmd; /* if non zero, write data to port 60 is expected */
134 /* Bitmask of devices with data available. */
142 target_phys_addr_t mask;
145 /* update irq and KBD_STAT_[MOUSE_]OBF */
146 /* XXX: not generating the irqs if KBD_MODE_DISABLE_KBD is set may be
147 incorrect, but it avoids having to simulate exact delays */
148 static void kbd_update_irq(KBDState *s)
150 int irq_kbd_level, irq_mouse_level;
154 s->status &= ~(KBD_STAT_OBF | KBD_STAT_MOUSE_OBF);
155 s->outport &= ~(KBD_OUT_OBF | KBD_OUT_MOUSE_OBF);
157 s->status |= KBD_STAT_OBF;
158 s->outport |= KBD_OUT_OBF;
159 /* kbd data takes priority over aux data. */
160 if (s->pending == KBD_PENDING_AUX) {
161 s->status |= KBD_STAT_MOUSE_OBF;
162 s->outport |= KBD_OUT_MOUSE_OBF;
163 if (s->mode & KBD_MODE_MOUSE_INT)
166 if ((s->mode & KBD_MODE_KBD_INT) &&
167 !(s->mode & KBD_MODE_DISABLE_KBD))
171 qemu_set_irq(s->irq_kbd, irq_kbd_level);
172 qemu_set_irq(s->irq_mouse, irq_mouse_level);
175 static void kbd_update_kbd_irq(void *opaque, int level)
177 KBDState *s = (KBDState *)opaque;
180 s->pending |= KBD_PENDING_KBD;
182 s->pending &= ~KBD_PENDING_KBD;
186 static void kbd_update_aux_irq(void *opaque, int level)
188 KBDState *s = (KBDState *)opaque;
191 s->pending |= KBD_PENDING_AUX;
193 s->pending &= ~KBD_PENDING_AUX;
197 static uint32_t kbd_read_status(void *opaque, uint32_t addr)
199 KBDState *s = opaque;
202 DPRINTF("kbd: read status=0x%02x\n", val);
206 static void kbd_queue(KBDState *s, int b, int aux)
209 ps2_queue(s->mouse, b);
211 ps2_queue(s->kbd, b);
214 static void ioport92_write(void *opaque, uint32_t addr, uint32_t val)
216 KBDState *s = opaque;
218 DPRINTF("kbd: write outport=0x%02x\n", val);
221 qemu_set_irq(*s->a20_out, (val >> 1) & 1);
224 qemu_system_reset_request();
228 static uint32_t ioport92_read(void *opaque, uint32_t addr)
230 KBDState *s = opaque;
234 DPRINTF("kbd: read outport=0x%02x\n", ret);
238 static void kbd_write_command(void *opaque, uint32_t addr, uint32_t val)
240 KBDState *s = opaque;
242 DPRINTF("kbd: write cmd=0x%02x\n", val);
244 /* Bits 3-0 of the output port P2 of the keyboard controller may be pulsed
245 * low for approximately 6 micro seconds. Bits 3-0 of the KBD_CCMD_PULSE
246 * command specify the output port bits to be pulsed.
247 * 0: Bit should be pulsed. 1: Bit should not be modified.
248 * The only useful version of this command is pulsing bit 0,
249 * which does a CPU reset.
251 if((val & KBD_CCMD_PULSE_BITS_3_0) == KBD_CCMD_PULSE_BITS_3_0) {
253 val = KBD_CCMD_RESET;
255 val = KBD_CCMD_NO_OP;
259 case KBD_CCMD_READ_MODE:
260 kbd_queue(s, s->mode, 0);
262 case KBD_CCMD_WRITE_MODE:
263 case KBD_CCMD_WRITE_OBUF:
264 case KBD_CCMD_WRITE_AUX_OBUF:
265 case KBD_CCMD_WRITE_MOUSE:
266 case KBD_CCMD_WRITE_OUTPORT:
269 case KBD_CCMD_MOUSE_DISABLE:
270 s->mode |= KBD_MODE_DISABLE_MOUSE;
272 case KBD_CCMD_MOUSE_ENABLE:
273 s->mode &= ~KBD_MODE_DISABLE_MOUSE;
275 case KBD_CCMD_TEST_MOUSE:
276 kbd_queue(s, 0x00, 0);
278 case KBD_CCMD_SELF_TEST:
279 s->status |= KBD_STAT_SELFTEST;
280 kbd_queue(s, 0x55, 0);
282 case KBD_CCMD_KBD_TEST:
283 kbd_queue(s, 0x00, 0);
285 case KBD_CCMD_KBD_DISABLE:
286 s->mode |= KBD_MODE_DISABLE_KBD;
289 case KBD_CCMD_KBD_ENABLE:
290 s->mode &= ~KBD_MODE_DISABLE_KBD;
293 case KBD_CCMD_READ_INPORT:
294 kbd_queue(s, 0x00, 0);
296 case KBD_CCMD_READ_OUTPORT:
297 kbd_queue(s, s->outport, 0);
299 case KBD_CCMD_ENABLE_A20:
301 qemu_irq_raise(*s->a20_out);
303 s->outport |= KBD_OUT_A20;
305 case KBD_CCMD_DISABLE_A20:
307 qemu_irq_lower(*s->a20_out);
309 s->outport &= ~KBD_OUT_A20;
312 qemu_system_reset_request();
318 fprintf(stderr, "qemu: unsupported keyboard cmd=0x%02x\n", val);
323 static uint32_t kbd_read_data(void *opaque, uint32_t addr)
325 KBDState *s = opaque;
328 if (s->pending == KBD_PENDING_AUX)
329 val = ps2_read_data(s->mouse);
331 val = ps2_read_data(s->kbd);
333 DPRINTF("kbd: read data=0x%02x\n", val);
337 static void kbd_write_data(void *opaque, uint32_t addr, uint32_t val)
339 KBDState *s = opaque;
341 DPRINTF("kbd: write data=0x%02x\n", val);
343 switch(s->write_cmd) {
345 ps2_write_keyboard(s->kbd, val);
347 case KBD_CCMD_WRITE_MODE:
349 ps2_keyboard_set_translation(s->kbd, (s->mode & KBD_MODE_KCC) != 0);
353 case KBD_CCMD_WRITE_OBUF:
354 kbd_queue(s, val, 0);
356 case KBD_CCMD_WRITE_AUX_OBUF:
357 kbd_queue(s, val, 1);
359 case KBD_CCMD_WRITE_OUTPORT:
360 ioport92_write(s, 0, val);
362 case KBD_CCMD_WRITE_MOUSE:
363 ps2_write_mouse(s->mouse, val);
371 static void kbd_reset(void *opaque)
373 KBDState *s = opaque;
375 s->mode = KBD_MODE_KBD_INT | KBD_MODE_MOUSE_INT;
376 s->status = KBD_STAT_CMD | KBD_STAT_UNLOCKED;
377 s->outport = KBD_OUT_RESET | KBD_OUT_A20;
380 static const VMStateDescription vmstate_kbd = {
383 .minimum_version_id = 3,
384 .minimum_version_id_old = 3,
385 .fields = (VMStateField []) {
386 VMSTATE_UINT8(write_cmd, KBDState),
387 VMSTATE_UINT8(status, KBDState),
388 VMSTATE_UINT8(mode, KBDState),
389 VMSTATE_UINT8(pending, KBDState),
390 VMSTATE_END_OF_LIST()
394 /* Memory mapped interface */
395 static uint32_t kbd_mm_readb (void *opaque, target_phys_addr_t addr)
397 KBDState *s = opaque;
400 return kbd_read_status(s, 0) & 0xff;
402 return kbd_read_data(s, 0) & 0xff;
405 static void kbd_mm_writeb (void *opaque, target_phys_addr_t addr, uint32_t value)
407 KBDState *s = opaque;
410 kbd_write_command(s, 0, value & 0xff);
412 kbd_write_data(s, 0, value & 0xff);
415 static CPUReadMemoryFunc * const kbd_mm_read[] = {
421 static CPUWriteMemoryFunc * const kbd_mm_write[] = {
427 void i8042_mm_init(qemu_irq kbd_irq, qemu_irq mouse_irq,
428 target_phys_addr_t base, ram_addr_t size,
429 target_phys_addr_t mask)
431 KBDState *s = qemu_mallocz(sizeof(KBDState));
434 s->irq_kbd = kbd_irq;
435 s->irq_mouse = mouse_irq;
438 vmstate_register(NULL, 0, &vmstate_kbd, s);
439 s_io_memory = cpu_register_io_memory(kbd_mm_read, kbd_mm_write, s);
440 cpu_register_physical_memory(base, size, s_io_memory);
442 s->kbd = ps2_kbd_init(kbd_update_kbd_irq, s);
443 s->mouse = ps2_mouse_init(kbd_update_aux_irq, s);
444 qemu_register_reset(kbd_reset, s);
447 typedef struct ISAKBDState {
452 void i8042_isa_mouse_fake_event(void *opaque)
454 ISADevice *dev = opaque;
455 KBDState *s = &(DO_UPCAST(ISAKBDState, dev, dev)->kbd);
457 ps2_mouse_fake_event(s->mouse);
460 void i8042_setup_a20_line(ISADevice *dev, qemu_irq *a20_out)
462 KBDState *s = &(DO_UPCAST(ISAKBDState, dev, dev)->kbd);
464 s->a20_out = a20_out;
467 static const VMStateDescription vmstate_kbd_isa = {
470 .minimum_version_id = 3,
471 .minimum_version_id_old = 3,
472 .fields = (VMStateField []) {
473 VMSTATE_STRUCT(kbd, ISAKBDState, 0, vmstate_kbd, KBDState),
474 VMSTATE_END_OF_LIST()
478 static int i8042_initfn(ISADevice *dev)
480 KBDState *s = &(DO_UPCAST(ISAKBDState, dev, dev)->kbd);
482 isa_init_irq(dev, &s->irq_kbd, 1);
483 isa_init_irq(dev, &s->irq_mouse, 12);
485 register_ioport_read(0x60, 1, 1, kbd_read_data, s);
486 register_ioport_write(0x60, 1, 1, kbd_write_data, s);
487 register_ioport_read(0x64, 1, 1, kbd_read_status, s);
488 register_ioport_write(0x64, 1, 1, kbd_write_command, s);
489 register_ioport_read(0x92, 1, 1, ioport92_read, s);
490 register_ioport_write(0x92, 1, 1, ioport92_write, s);
492 s->kbd = ps2_kbd_init(kbd_update_kbd_irq, s);
493 s->mouse = ps2_mouse_init(kbd_update_aux_irq, s);
494 qemu_register_reset(kbd_reset, s);
498 static ISADeviceInfo i8042_info = {
499 .qdev.name = "i8042",
500 .qdev.size = sizeof(ISAKBDState),
501 .qdev.vmsd = &vmstate_kbd_isa,
503 .init = i8042_initfn,
506 static void i8042_register(void)
508 isa_qdev_register(&i8042_info);
510 device_init(i8042_register)