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
26 /* debug PC keyboard */
29 /* debug PC keyboard : only mouse */
32 /* Keyboard Controller Commands */
33 #define KBD_CCMD_READ_MODE 0x20 /* Read mode bits */
34 #define KBD_CCMD_WRITE_MODE 0x60 /* Write mode bits */
35 #define KBD_CCMD_GET_VERSION 0xA1 /* Get controller version */
36 #define KBD_CCMD_MOUSE_DISABLE 0xA7 /* Disable mouse interface */
37 #define KBD_CCMD_MOUSE_ENABLE 0xA8 /* Enable mouse interface */
38 #define KBD_CCMD_TEST_MOUSE 0xA9 /* Mouse interface test */
39 #define KBD_CCMD_SELF_TEST 0xAA /* Controller self test */
40 #define KBD_CCMD_KBD_TEST 0xAB /* Keyboard interface test */
41 #define KBD_CCMD_KBD_DISABLE 0xAD /* Keyboard interface disable */
42 #define KBD_CCMD_KBD_ENABLE 0xAE /* Keyboard interface enable */
43 #define KBD_CCMD_READ_INPORT 0xC0 /* read input port */
44 #define KBD_CCMD_READ_OUTPORT 0xD0 /* read output port */
45 #define KBD_CCMD_WRITE_OUTPORT 0xD1 /* write output port */
46 #define KBD_CCMD_WRITE_OBUF 0xD2
47 #define KBD_CCMD_WRITE_AUX_OBUF 0xD3 /* Write to output buffer as if
48 initiated by the auxiliary device */
49 #define KBD_CCMD_WRITE_MOUSE 0xD4 /* Write the following byte to the mouse */
50 #define KBD_CCMD_DISABLE_A20 0xDD /* HP vectra only ? */
51 #define KBD_CCMD_ENABLE_A20 0xDF /* HP vectra only ? */
52 #define KBD_CCMD_RESET 0xFE
54 /* Keyboard Commands */
55 #define KBD_CMD_SET_LEDS 0xED /* Set keyboard leds */
56 #define KBD_CMD_ECHO 0xEE
57 #define KBD_CMD_GET_ID 0xF2 /* get keyboard ID */
58 #define KBD_CMD_SET_RATE 0xF3 /* Set typematic rate */
59 #define KBD_CMD_ENABLE 0xF4 /* Enable scanning */
60 #define KBD_CMD_RESET_DISABLE 0xF5 /* reset and disable scanning */
61 #define KBD_CMD_RESET_ENABLE 0xF6 /* reset and enable scanning */
62 #define KBD_CMD_RESET 0xFF /* Reset */
64 /* Keyboard Replies */
65 #define KBD_REPLY_POR 0xAA /* Power on reset */
66 #define KBD_REPLY_ACK 0xFA /* Command ACK */
67 #define KBD_REPLY_RESEND 0xFE /* Command NACK, send the cmd again */
69 /* Status Register Bits */
70 #define KBD_STAT_OBF 0x01 /* Keyboard output buffer full */
71 #define KBD_STAT_IBF 0x02 /* Keyboard input buffer full */
72 #define KBD_STAT_SELFTEST 0x04 /* Self test successful */
73 #define KBD_STAT_CMD 0x08 /* Last write was a command write (0=data) */
74 #define KBD_STAT_UNLOCKED 0x10 /* Zero if keyboard locked */
75 #define KBD_STAT_MOUSE_OBF 0x20 /* Mouse output buffer full */
76 #define KBD_STAT_GTO 0x40 /* General receive/xmit timeout */
77 #define KBD_STAT_PERR 0x80 /* Parity error */
79 /* Controller Mode Register Bits */
80 #define KBD_MODE_KBD_INT 0x01 /* Keyboard data generate IRQ1 */
81 #define KBD_MODE_MOUSE_INT 0x02 /* Mouse data generate IRQ12 */
82 #define KBD_MODE_SYS 0x04 /* The system flag (?) */
83 #define KBD_MODE_NO_KEYLOCK 0x08 /* The keylock doesn't affect the keyboard if set */
84 #define KBD_MODE_DISABLE_KBD 0x10 /* Disable keyboard interface */
85 #define KBD_MODE_DISABLE_MOUSE 0x20 /* Disable mouse interface */
86 #define KBD_MODE_KCC 0x40 /* Scan code conversion to PC format */
87 #define KBD_MODE_RFU 0x80
90 #define AUX_SET_SCALE11 0xE6 /* Set 1:1 scaling */
91 #define AUX_SET_SCALE21 0xE7 /* Set 2:1 scaling */
92 #define AUX_SET_RES 0xE8 /* Set resolution */
93 #define AUX_GET_SCALE 0xE9 /* Get scaling factor */
94 #define AUX_SET_STREAM 0xEA /* Set stream mode */
95 #define AUX_POLL 0xEB /* Poll */
96 #define AUX_RESET_WRAP 0xEC /* Reset wrap mode */
97 #define AUX_SET_WRAP 0xEE /* Set wrap mode */
98 #define AUX_SET_REMOTE 0xF0 /* Set remote mode */
99 #define AUX_GET_TYPE 0xF2 /* Get type */
100 #define AUX_SET_SAMPLE 0xF3 /* Set sample rate */
101 #define AUX_ENABLE_DEV 0xF4 /* Enable aux device */
102 #define AUX_DISABLE_DEV 0xF5 /* Disable aux device */
103 #define AUX_SET_DEFAULT 0xF6
104 #define AUX_RESET 0xFF /* Reset aux device */
105 #define AUX_ACK 0xFA /* Command byte ACK. */
107 #define MOUSE_STATUS_REMOTE 0x40
108 #define MOUSE_STATUS_ENABLED 0x20
109 #define MOUSE_STATUS_SCALE21 0x10
111 #define KBD_QUEUE_SIZE 256
113 #define KBD_PENDING_KBD 1
114 #define KBD_PENDING_AUX 2
116 typedef struct KBDState {
117 uint8_t write_cmd; /* if non zero, write data to port 60 is expected */
120 /* Bitmask of devices with data available. */
127 target_phys_addr_t base;
132 /* update irq and KBD_STAT_[MOUSE_]OBF */
133 /* XXX: not generating the irqs if KBD_MODE_DISABLE_KBD is set may be
134 incorrect, but it avoids having to simulate exact delays */
135 static void kbd_update_irq(KBDState *s)
137 int irq_kbd_level, irq_mouse_level;
141 s->status &= ~(KBD_STAT_OBF | KBD_STAT_MOUSE_OBF);
143 s->status |= KBD_STAT_OBF;
144 /* kbd data takes priority over aux data. */
145 if (s->pending == KBD_PENDING_AUX) {
146 s->status |= KBD_STAT_MOUSE_OBF;
147 if (s->mode & KBD_MODE_MOUSE_INT)
150 if ((s->mode & KBD_MODE_KBD_INT) &&
151 !(s->mode & KBD_MODE_DISABLE_KBD))
155 qemu_set_irq(s->irq_kbd, irq_kbd_level);
156 qemu_set_irq(s->irq_mouse, irq_mouse_level);
159 static void kbd_update_kbd_irq(void *opaque, int level)
161 KBDState *s = (KBDState *)opaque;
164 s->pending |= KBD_PENDING_KBD;
166 s->pending &= ~KBD_PENDING_KBD;
170 static void kbd_update_aux_irq(void *opaque, int level)
172 KBDState *s = (KBDState *)opaque;
175 s->pending |= KBD_PENDING_AUX;
177 s->pending &= ~KBD_PENDING_AUX;
181 static uint32_t kbd_read_status(void *opaque, uint32_t addr)
183 KBDState *s = opaque;
186 #if defined(DEBUG_KBD)
187 printf("kbd: read status=0x%02x\n", val);
192 static void kbd_queue(KBDState *s, int b, int aux)
195 ps2_queue(s->mouse, b);
197 ps2_queue(s->kbd, b);
200 static void kbd_write_command(void *opaque, uint32_t addr, uint32_t val)
202 KBDState *s = opaque;
205 printf("kbd: write cmd=0x%02x\n", val);
208 case KBD_CCMD_READ_MODE:
209 kbd_queue(s, s->mode, 0);
211 case KBD_CCMD_WRITE_MODE:
212 case KBD_CCMD_WRITE_OBUF:
213 case KBD_CCMD_WRITE_AUX_OBUF:
214 case KBD_CCMD_WRITE_MOUSE:
215 case KBD_CCMD_WRITE_OUTPORT:
218 case KBD_CCMD_MOUSE_DISABLE:
219 s->mode |= KBD_MODE_DISABLE_MOUSE;
221 case KBD_CCMD_MOUSE_ENABLE:
222 s->mode &= ~KBD_MODE_DISABLE_MOUSE;
224 case KBD_CCMD_TEST_MOUSE:
225 kbd_queue(s, 0x00, 0);
227 case KBD_CCMD_SELF_TEST:
228 s->status |= KBD_STAT_SELFTEST;
229 kbd_queue(s, 0x55, 0);
231 case KBD_CCMD_KBD_TEST:
232 kbd_queue(s, 0x00, 0);
234 case KBD_CCMD_KBD_DISABLE:
235 s->mode |= KBD_MODE_DISABLE_KBD;
238 case KBD_CCMD_KBD_ENABLE:
239 s->mode &= ~KBD_MODE_DISABLE_KBD;
242 case KBD_CCMD_READ_INPORT:
243 kbd_queue(s, 0x00, 0);
245 case KBD_CCMD_READ_OUTPORT:
246 /* XXX: check that */
248 val = 0x01 | (ioport_get_a20() << 1);
252 if (s->status & KBD_STAT_OBF)
254 if (s->status & KBD_STAT_MOUSE_OBF)
256 kbd_queue(s, val, 0);
259 case KBD_CCMD_ENABLE_A20:
262 case KBD_CCMD_DISABLE_A20:
267 qemu_system_reset_request();
270 /* ignore that - I don't know what is its use */
273 fprintf(stderr, "qemu: unsupported keyboard cmd=0x%02x\n", val);
278 static uint32_t kbd_read_data(void *opaque, uint32_t addr)
280 KBDState *s = opaque;
282 if (s->pending == KBD_PENDING_AUX)
283 return ps2_read_data(s->mouse);
285 return ps2_read_data(s->kbd);
288 void kbd_write_data(void *opaque, uint32_t addr, uint32_t val)
290 KBDState *s = opaque;
293 printf("kbd: write data=0x%02x\n", val);
296 switch(s->write_cmd) {
298 ps2_write_keyboard(s->kbd, val);
300 case KBD_CCMD_WRITE_MODE:
302 ps2_keyboard_set_translation(s->kbd, (s->mode & KBD_MODE_KCC) != 0);
306 case KBD_CCMD_WRITE_OBUF:
307 kbd_queue(s, val, 0);
309 case KBD_CCMD_WRITE_AUX_OBUF:
310 kbd_queue(s, val, 1);
312 case KBD_CCMD_WRITE_OUTPORT:
314 ioport_set_a20((val >> 1) & 1);
317 qemu_system_reset_request();
320 case KBD_CCMD_WRITE_MOUSE:
321 ps2_write_mouse(s->mouse, val);
329 static void kbd_reset(void *opaque)
331 KBDState *s = opaque;
333 s->mode = KBD_MODE_KBD_INT | KBD_MODE_MOUSE_INT;
334 s->status = KBD_STAT_CMD | KBD_STAT_UNLOCKED;
337 static void kbd_save(QEMUFile* f, void* opaque)
339 KBDState *s = (KBDState*)opaque;
341 qemu_put_8s(f, &s->write_cmd);
342 qemu_put_8s(f, &s->status);
343 qemu_put_8s(f, &s->mode);
344 qemu_put_8s(f, &s->pending);
347 static int kbd_load(QEMUFile* f, void* opaque, int version_id)
349 KBDState *s = (KBDState*)opaque;
353 qemu_get_8s(f, &s->write_cmd);
354 qemu_get_8s(f, &s->status);
355 qemu_get_8s(f, &s->mode);
356 qemu_get_8s(f, &s->pending);
360 void i8042_init(qemu_irq kbd_irq, qemu_irq mouse_irq, uint32_t io_base)
362 KBDState *s = &kbd_state;
364 s->irq_kbd = kbd_irq;
365 s->irq_mouse = mouse_irq;
368 register_savevm("pckbd", 0, 3, kbd_save, kbd_load, s);
369 register_ioport_read(io_base, 1, 1, kbd_read_data, s);
370 register_ioport_write(io_base, 1, 1, kbd_write_data, s);
371 register_ioport_read(io_base + 4, 1, 1, kbd_read_status, s);
372 register_ioport_write(io_base + 4, 1, 1, kbd_write_command, s);
374 s->kbd = ps2_kbd_init(kbd_update_kbd_irq, s);
375 s->mouse = ps2_mouse_init(kbd_update_aux_irq, s);
377 vmmouse_init(s->mouse);
379 qemu_register_reset(kbd_reset, s);
382 /* Memory mapped interface */
383 uint32_t kbd_mm_readb (void *opaque, target_phys_addr_t addr)
385 KBDState *s = opaque;
388 return kbd_read_data(s, 0);
390 return kbd_read_status(s, 0);
393 void kbd_mm_writeb (void *opaque,
394 target_phys_addr_t addr, uint32_t value)
396 KBDState *s = opaque;
399 kbd_write_data(s, 0, value);
401 kbd_write_command(s, 0, value);
404 static CPUReadMemoryFunc *kbd_mm_read[] = {
410 static CPUWriteMemoryFunc *kbd_mm_write[] = {
416 void i8042_mm_init(qemu_irq kbd_irq, qemu_irq mouse_irq, target_ulong base, int it_shift)
418 KBDState *s = &kbd_state;
421 s->irq_kbd = kbd_irq;
422 s->irq_mouse = mouse_irq;
426 register_savevm("pckbd", 0, 3, kbd_save, kbd_load, s);
427 s_io_memory = cpu_register_io_memory(0, kbd_mm_read, kbd_mm_write, s);
428 cpu_register_physical_memory(base & ~(TARGET_PAGE_SIZE - 1), TARGET_PAGE_SIZE, s_io_memory);
430 s->kbd = ps2_kbd_init(kbd_update_kbd_irq, s);
431 s->mouse = ps2_mouse_init(kbd_update_aux_irq, s);
433 vmmouse_init(s->mouse);
435 qemu_register_reset(kbd_reset, s);