git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1658 c046a42c-6fe2-441c-8c8c-71466251a162
368 lines
11 KiB
C
368 lines
11 KiB
C
/*
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* QEMU PC keyboard emulation
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "vl.h"
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/* debug PC keyboard */
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//#define DEBUG_KBD
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/* debug PC keyboard : only mouse */
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//#define DEBUG_MOUSE
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/* Keyboard Controller Commands */
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#define KBD_CCMD_READ_MODE 0x20 /* Read mode bits */
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#define KBD_CCMD_WRITE_MODE 0x60 /* Write mode bits */
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#define KBD_CCMD_GET_VERSION 0xA1 /* Get controller version */
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#define KBD_CCMD_MOUSE_DISABLE 0xA7 /* Disable mouse interface */
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#define KBD_CCMD_MOUSE_ENABLE 0xA8 /* Enable mouse interface */
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#define KBD_CCMD_TEST_MOUSE 0xA9 /* Mouse interface test */
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#define KBD_CCMD_SELF_TEST 0xAA /* Controller self test */
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#define KBD_CCMD_KBD_TEST 0xAB /* Keyboard interface test */
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#define KBD_CCMD_KBD_DISABLE 0xAD /* Keyboard interface disable */
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#define KBD_CCMD_KBD_ENABLE 0xAE /* Keyboard interface enable */
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#define KBD_CCMD_READ_INPORT 0xC0 /* read input port */
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#define KBD_CCMD_READ_OUTPORT 0xD0 /* read output port */
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#define KBD_CCMD_WRITE_OUTPORT 0xD1 /* write output port */
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#define KBD_CCMD_WRITE_OBUF 0xD2
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#define KBD_CCMD_WRITE_AUX_OBUF 0xD3 /* Write to output buffer as if
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initiated by the auxiliary device */
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#define KBD_CCMD_WRITE_MOUSE 0xD4 /* Write the following byte to the mouse */
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#define KBD_CCMD_DISABLE_A20 0xDD /* HP vectra only ? */
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#define KBD_CCMD_ENABLE_A20 0xDF /* HP vectra only ? */
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#define KBD_CCMD_RESET 0xFE
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/* Keyboard Commands */
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#define KBD_CMD_SET_LEDS 0xED /* Set keyboard leds */
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#define KBD_CMD_ECHO 0xEE
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#define KBD_CMD_GET_ID 0xF2 /* get keyboard ID */
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#define KBD_CMD_SET_RATE 0xF3 /* Set typematic rate */
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#define KBD_CMD_ENABLE 0xF4 /* Enable scanning */
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#define KBD_CMD_RESET_DISABLE 0xF5 /* reset and disable scanning */
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#define KBD_CMD_RESET_ENABLE 0xF6 /* reset and enable scanning */
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#define KBD_CMD_RESET 0xFF /* Reset */
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/* Keyboard Replies */
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#define KBD_REPLY_POR 0xAA /* Power on reset */
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#define KBD_REPLY_ACK 0xFA /* Command ACK */
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#define KBD_REPLY_RESEND 0xFE /* Command NACK, send the cmd again */
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/* Status Register Bits */
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#define KBD_STAT_OBF 0x01 /* Keyboard output buffer full */
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#define KBD_STAT_IBF 0x02 /* Keyboard input buffer full */
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#define KBD_STAT_SELFTEST 0x04 /* Self test successful */
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#define KBD_STAT_CMD 0x08 /* Last write was a command write (0=data) */
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#define KBD_STAT_UNLOCKED 0x10 /* Zero if keyboard locked */
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#define KBD_STAT_MOUSE_OBF 0x20 /* Mouse output buffer full */
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#define KBD_STAT_GTO 0x40 /* General receive/xmit timeout */
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#define KBD_STAT_PERR 0x80 /* Parity error */
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/* Controller Mode Register Bits */
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#define KBD_MODE_KBD_INT 0x01 /* Keyboard data generate IRQ1 */
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#define KBD_MODE_MOUSE_INT 0x02 /* Mouse data generate IRQ12 */
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#define KBD_MODE_SYS 0x04 /* The system flag (?) */
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#define KBD_MODE_NO_KEYLOCK 0x08 /* The keylock doesn't affect the keyboard if set */
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#define KBD_MODE_DISABLE_KBD 0x10 /* Disable keyboard interface */
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#define KBD_MODE_DISABLE_MOUSE 0x20 /* Disable mouse interface */
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#define KBD_MODE_KCC 0x40 /* Scan code conversion to PC format */
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#define KBD_MODE_RFU 0x80
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/* Mouse Commands */
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#define AUX_SET_SCALE11 0xE6 /* Set 1:1 scaling */
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#define AUX_SET_SCALE21 0xE7 /* Set 2:1 scaling */
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#define AUX_SET_RES 0xE8 /* Set resolution */
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#define AUX_GET_SCALE 0xE9 /* Get scaling factor */
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#define AUX_SET_STREAM 0xEA /* Set stream mode */
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#define AUX_POLL 0xEB /* Poll */
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#define AUX_RESET_WRAP 0xEC /* Reset wrap mode */
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#define AUX_SET_WRAP 0xEE /* Set wrap mode */
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#define AUX_SET_REMOTE 0xF0 /* Set remote mode */
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#define AUX_GET_TYPE 0xF2 /* Get type */
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#define AUX_SET_SAMPLE 0xF3 /* Set sample rate */
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#define AUX_ENABLE_DEV 0xF4 /* Enable aux device */
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#define AUX_DISABLE_DEV 0xF5 /* Disable aux device */
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#define AUX_SET_DEFAULT 0xF6
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#define AUX_RESET 0xFF /* Reset aux device */
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#define AUX_ACK 0xFA /* Command byte ACK. */
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#define MOUSE_STATUS_REMOTE 0x40
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#define MOUSE_STATUS_ENABLED 0x20
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#define MOUSE_STATUS_SCALE21 0x10
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#define KBD_QUEUE_SIZE 256
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#define KBD_PENDING_KBD 1
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#define KBD_PENDING_AUX 2
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typedef struct KBDState {
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uint8_t write_cmd; /* if non zero, write data to port 60 is expected */
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uint8_t status;
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uint8_t mode;
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/* Bitmask of devices with data available. */
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int pending;
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void *kbd;
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void *mouse;
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} KBDState;
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KBDState kbd_state;
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/* update irq and KBD_STAT_[MOUSE_]OBF */
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/* XXX: not generating the irqs if KBD_MODE_DISABLE_KBD is set may be
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incorrect, but it avoids having to simulate exact delays */
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static void kbd_update_irq(KBDState *s)
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{
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int irq12_level, irq1_level;
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irq1_level = 0;
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irq12_level = 0;
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s->status &= ~(KBD_STAT_OBF | KBD_STAT_MOUSE_OBF);
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if (s->pending) {
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s->status |= KBD_STAT_OBF;
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/* kdb data takes priority over aux data. */
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if (s->pending == KBD_PENDING_AUX) {
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s->status |= KBD_STAT_MOUSE_OBF;
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if (s->mode & KBD_MODE_MOUSE_INT)
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irq12_level = 1;
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} else {
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if ((s->mode & KBD_MODE_KBD_INT) &&
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!(s->mode & KBD_MODE_DISABLE_KBD))
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irq1_level = 1;
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}
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}
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pic_set_irq(1, irq1_level);
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pic_set_irq(12, irq12_level);
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}
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static void kbd_update_kbd_irq(void *opaque, int level)
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{
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KBDState *s = (KBDState *)opaque;
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if (level)
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s->pending |= KBD_PENDING_KBD;
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else
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s->pending &= ~KBD_PENDING_KBD;
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kbd_update_irq(s);
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}
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static void kbd_update_aux_irq(void *opaque, int level)
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{
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KBDState *s = (KBDState *)opaque;
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if (level)
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s->pending |= KBD_PENDING_AUX;
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else
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s->pending &= ~KBD_PENDING_AUX;
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kbd_update_irq(s);
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}
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static uint32_t kbd_read_status(void *opaque, uint32_t addr)
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{
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KBDState *s = opaque;
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int val;
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val = s->status;
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#if defined(DEBUG_KBD)
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printf("kbd: read status=0x%02x\n", val);
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#endif
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return val;
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}
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static void kbd_queue(KBDState *s, int b, int aux)
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{
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if (aux)
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ps2_queue(s->mouse, b);
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else
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ps2_queue(s->kbd, b);
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}
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static void kbd_write_command(void *opaque, uint32_t addr, uint32_t val)
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{
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KBDState *s = opaque;
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#ifdef DEBUG_KBD
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printf("kbd: write cmd=0x%02x\n", val);
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#endif
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switch(val) {
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case KBD_CCMD_READ_MODE:
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kbd_queue(s, s->mode, 0);
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break;
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case KBD_CCMD_WRITE_MODE:
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case KBD_CCMD_WRITE_OBUF:
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case KBD_CCMD_WRITE_AUX_OBUF:
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case KBD_CCMD_WRITE_MOUSE:
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case KBD_CCMD_WRITE_OUTPORT:
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s->write_cmd = val;
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break;
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case KBD_CCMD_MOUSE_DISABLE:
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s->mode |= KBD_MODE_DISABLE_MOUSE;
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break;
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case KBD_CCMD_MOUSE_ENABLE:
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s->mode &= ~KBD_MODE_DISABLE_MOUSE;
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break;
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case KBD_CCMD_TEST_MOUSE:
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kbd_queue(s, 0x00, 0);
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break;
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case KBD_CCMD_SELF_TEST:
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s->status |= KBD_STAT_SELFTEST;
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kbd_queue(s, 0x55, 0);
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break;
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case KBD_CCMD_KBD_TEST:
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kbd_queue(s, 0x00, 0);
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break;
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case KBD_CCMD_KBD_DISABLE:
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s->mode |= KBD_MODE_DISABLE_KBD;
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kbd_update_irq(s);
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break;
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case KBD_CCMD_KBD_ENABLE:
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s->mode &= ~KBD_MODE_DISABLE_KBD;
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kbd_update_irq(s);
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break;
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case KBD_CCMD_READ_INPORT:
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kbd_queue(s, 0x00, 0);
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break;
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case KBD_CCMD_READ_OUTPORT:
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/* XXX: check that */
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#ifdef TARGET_I386
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val = 0x01 | (ioport_get_a20() << 1);
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#else
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val = 0x01;
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#endif
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if (s->status & KBD_STAT_OBF)
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val |= 0x10;
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if (s->status & KBD_STAT_MOUSE_OBF)
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val |= 0x20;
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kbd_queue(s, val, 0);
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break;
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#ifdef TARGET_I386
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case KBD_CCMD_ENABLE_A20:
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ioport_set_a20(1);
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break;
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case KBD_CCMD_DISABLE_A20:
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ioport_set_a20(0);
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break;
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#endif
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case KBD_CCMD_RESET:
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qemu_system_reset_request();
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break;
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case 0xff:
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/* ignore that - I don't know what is its use */
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break;
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default:
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fprintf(stderr, "qemu: unsupported keyboard cmd=0x%02x\n", val);
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break;
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}
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}
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static uint32_t kbd_read_data(void *opaque, uint32_t addr)
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{
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KBDState *s = opaque;
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if (s->pending == KBD_PENDING_AUX)
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return ps2_read_data(s->mouse);
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return ps2_read_data(s->kbd);
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}
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void kbd_write_data(void *opaque, uint32_t addr, uint32_t val)
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{
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KBDState *s = opaque;
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#ifdef DEBUG_KBD
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printf("kbd: write data=0x%02x\n", val);
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#endif
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switch(s->write_cmd) {
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case 0:
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ps2_write_keyboard(s->kbd, val);
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break;
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case KBD_CCMD_WRITE_MODE:
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s->mode = val;
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/* ??? */
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kbd_update_irq(s);
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break;
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case KBD_CCMD_WRITE_OBUF:
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kbd_queue(s, val, 0);
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break;
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case KBD_CCMD_WRITE_AUX_OBUF:
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kbd_queue(s, val, 1);
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break;
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case KBD_CCMD_WRITE_OUTPORT:
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#ifdef TARGET_I386
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ioport_set_a20((val >> 1) & 1);
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#endif
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if (!(val & 1)) {
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qemu_system_reset_request();
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}
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break;
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case KBD_CCMD_WRITE_MOUSE:
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ps2_write_mouse(s->mouse, val);
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break;
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default:
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break;
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}
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s->write_cmd = 0;
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}
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static void kbd_reset(void *opaque)
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{
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KBDState *s = opaque;
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s->mode = KBD_MODE_KBD_INT | KBD_MODE_MOUSE_INT;
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s->status = KBD_STAT_CMD | KBD_STAT_UNLOCKED;
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}
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static void kbd_save(QEMUFile* f, void* opaque)
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{
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KBDState *s = (KBDState*)opaque;
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qemu_put_8s(f, &s->write_cmd);
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qemu_put_8s(f, &s->status);
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qemu_put_8s(f, &s->mode);
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}
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static int kbd_load(QEMUFile* f, void* opaque, int version_id)
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{
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KBDState *s = (KBDState*)opaque;
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if (version_id != 2)
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return -EINVAL;
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qemu_get_8s(f, &s->write_cmd);
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qemu_get_8s(f, &s->status);
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qemu_get_8s(f, &s->mode);
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return 0;
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}
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void kbd_init(void)
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{
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KBDState *s = &kbd_state;
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kbd_reset(s);
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register_savevm("pckbd", 0, 2, kbd_save, kbd_load, s);
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register_ioport_read(0x60, 1, 1, kbd_read_data, s);
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register_ioport_write(0x60, 1, 1, kbd_write_data, s);
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register_ioport_read(0x64, 1, 1, kbd_read_status, s);
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register_ioport_write(0x64, 1, 1, kbd_write_command, s);
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s->kbd = ps2_kbd_init(kbd_update_kbd_irq, s);
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s->mouse = ps2_mouse_init(kbd_update_aux_irq, s);
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qemu_register_reset(kbd_reset, s);
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}
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