/* * QEMU PC keyboard emulation * * Copyright (c) 2003 Fabrice Bellard * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include "vl.h" /* debug PC keyboard */ //#define DEBUG_KBD /* debug PC keyboard : only mouse */ //#define DEBUG_MOUSE /* Keyboard Controller Commands */ #define KBD_CCMD_READ_MODE 0x20 /* Read mode bits */ #define KBD_CCMD_WRITE_MODE 0x60 /* Write mode bits */ #define KBD_CCMD_GET_VERSION 0xA1 /* Get controller version */ #define KBD_CCMD_MOUSE_DISABLE 0xA7 /* Disable mouse interface */ #define KBD_CCMD_MOUSE_ENABLE 0xA8 /* Enable mouse interface */ #define KBD_CCMD_TEST_MOUSE 0xA9 /* Mouse interface test */ #define KBD_CCMD_SELF_TEST 0xAA /* Controller self test */ #define KBD_CCMD_KBD_TEST 0xAB /* Keyboard interface test */ #define KBD_CCMD_KBD_DISABLE 0xAD /* Keyboard interface disable */ #define KBD_CCMD_KBD_ENABLE 0xAE /* Keyboard interface enable */ #define KBD_CCMD_READ_INPORT 0xC0 /* read input port */ #define KBD_CCMD_READ_OUTPORT 0xD0 /* read output port */ #define KBD_CCMD_WRITE_OUTPORT 0xD1 /* write output port */ #define KBD_CCMD_WRITE_OBUF 0xD2 #define KBD_CCMD_WRITE_AUX_OBUF 0xD3 /* Write to output buffer as if initiated by the auxiliary device */ #define KBD_CCMD_WRITE_MOUSE 0xD4 /* Write the following byte to the mouse */ #define KBD_CCMD_DISABLE_A20 0xDD /* HP vectra only ? */ #define KBD_CCMD_ENABLE_A20 0xDF /* HP vectra only ? */ #define KBD_CCMD_RESET 0xFE /* Keyboard Commands */ #define KBD_CMD_SET_LEDS 0xED /* Set keyboard leds */ #define KBD_CMD_ECHO 0xEE #define KBD_CMD_GET_ID 0xF2 /* get keyboard ID */ #define KBD_CMD_SET_RATE 0xF3 /* Set typematic rate */ #define KBD_CMD_ENABLE 0xF4 /* Enable scanning */ #define KBD_CMD_RESET_DISABLE 0xF5 /* reset and disable scanning */ #define KBD_CMD_RESET_ENABLE 0xF6 /* reset and enable scanning */ #define KBD_CMD_RESET 0xFF /* Reset */ /* Keyboard Replies */ #define KBD_REPLY_POR 0xAA /* Power on reset */ #define KBD_REPLY_ACK 0xFA /* Command ACK */ #define KBD_REPLY_RESEND 0xFE /* Command NACK, send the cmd again */ /* Status Register Bits */ #define KBD_STAT_OBF 0x01 /* Keyboard output buffer full */ #define KBD_STAT_IBF 0x02 /* Keyboard input buffer full */ #define KBD_STAT_SELFTEST 0x04 /* Self test successful */ #define KBD_STAT_CMD 0x08 /* Last write was a command write (0=data) */ #define KBD_STAT_UNLOCKED 0x10 /* Zero if keyboard locked */ #define KBD_STAT_MOUSE_OBF 0x20 /* Mouse output buffer full */ #define KBD_STAT_GTO 0x40 /* General receive/xmit timeout */ #define KBD_STAT_PERR 0x80 /* Parity error */ /* Controller Mode Register Bits */ #define KBD_MODE_KBD_INT 0x01 /* Keyboard data generate IRQ1 */ #define KBD_MODE_MOUSE_INT 0x02 /* Mouse data generate IRQ12 */ #define KBD_MODE_SYS 0x04 /* The system flag (?) */ #define KBD_MODE_NO_KEYLOCK 0x08 /* The keylock doesn't affect the keyboard if set */ #define KBD_MODE_DISABLE_KBD 0x10 /* Disable keyboard interface */ #define KBD_MODE_DISABLE_MOUSE 0x20 /* Disable mouse interface */ #define KBD_MODE_KCC 0x40 /* Scan code conversion to PC format */ #define KBD_MODE_RFU 0x80 /* Mouse Commands */ #define AUX_SET_SCALE11 0xE6 /* Set 1:1 scaling */ #define AUX_SET_SCALE21 0xE7 /* Set 2:1 scaling */ #define AUX_SET_RES 0xE8 /* Set resolution */ #define AUX_GET_SCALE 0xE9 /* Get scaling factor */ #define AUX_SET_STREAM 0xEA /* Set stream mode */ #define AUX_POLL 0xEB /* Poll */ #define AUX_RESET_WRAP 0xEC /* Reset wrap mode */ #define AUX_SET_WRAP 0xEE /* Set wrap mode */ #define AUX_SET_REMOTE 0xF0 /* Set remote mode */ #define AUX_GET_TYPE 0xF2 /* Get type */ #define AUX_SET_SAMPLE 0xF3 /* Set sample rate */ #define AUX_ENABLE_DEV 0xF4 /* Enable aux device */ #define AUX_DISABLE_DEV 0xF5 /* Disable aux device */ #define AUX_SET_DEFAULT 0xF6 #define AUX_RESET 0xFF /* Reset aux device */ #define AUX_ACK 0xFA /* Command byte ACK. */ #define MOUSE_STATUS_REMOTE 0x40 #define MOUSE_STATUS_ENABLED 0x20 #define MOUSE_STATUS_SCALE21 0x10 #define KBD_QUEUE_SIZE 256 #define KBD_PENDING_KBD 1 #define KBD_PENDING_AUX 2 typedef struct KBDState { uint8_t write_cmd; /* if non zero, write data to port 60 is expected */ uint8_t status; uint8_t mode; /* Bitmask of devices with data available. */ uint8_t pending; void *kbd; void *mouse; qemu_irq irq_kbd; qemu_irq irq_mouse; } KBDState; KBDState kbd_state; /* update irq and KBD_STAT_[MOUSE_]OBF */ /* XXX: not generating the irqs if KBD_MODE_DISABLE_KBD is set may be incorrect, but it avoids having to simulate exact delays */ static void kbd_update_irq(KBDState *s) { int irq_kbd_level, irq_mouse_level; irq_kbd_level = 0; irq_mouse_level = 0; s->status &= ~(KBD_STAT_OBF | KBD_STAT_MOUSE_OBF); if (s->pending) { s->status |= KBD_STAT_OBF; /* kdb data takes priority over aux data. */ if (s->pending == KBD_PENDING_AUX) { s->status |= KBD_STAT_MOUSE_OBF; if (s->mode & KBD_MODE_MOUSE_INT) irq_mouse_level = 1; } else { if ((s->mode & KBD_MODE_KBD_INT) && !(s->mode & KBD_MODE_DISABLE_KBD)) irq_kbd_level = 1; } } qemu_set_irq(s->irq_kbd, irq_kbd_level); qemu_set_irq(s->irq_mouse, irq_mouse_level); } static void kbd_update_kbd_irq(void *opaque, int level) { KBDState *s = (KBDState *)opaque; if (level) s->pending |= KBD_PENDING_KBD; else s->pending &= ~KBD_PENDING_KBD; kbd_update_irq(s); } static void kbd_update_aux_irq(void *opaque, int level) { KBDState *s = (KBDState *)opaque; if (level) s->pending |= KBD_PENDING_AUX; else s->pending &= ~KBD_PENDING_AUX; kbd_update_irq(s); } static uint32_t kbd_read_status(void *opaque, uint32_t addr) { KBDState *s = opaque; int val; val = s->status; #if defined(DEBUG_KBD) printf("kbd: read status=0x%02x\n", val); #endif return val; } static void kbd_queue(KBDState *s, int b, int aux) { if (aux) ps2_queue(s->mouse, b); else ps2_queue(s->kbd, b); } static void kbd_write_command(void *opaque, uint32_t addr, uint32_t val) { KBDState *s = opaque; #ifdef DEBUG_KBD printf("kbd: write cmd=0x%02x\n", val); #endif switch(val) { case KBD_CCMD_READ_MODE: kbd_queue(s, s->mode, 0); break; case KBD_CCMD_WRITE_MODE: case KBD_CCMD_WRITE_OBUF: case KBD_CCMD_WRITE_AUX_OBUF: case KBD_CCMD_WRITE_MOUSE: case KBD_CCMD_WRITE_OUTPORT: s->write_cmd = val; break; case KBD_CCMD_MOUSE_DISABLE: s->mode |= KBD_MODE_DISABLE_MOUSE; break; case KBD_CCMD_MOUSE_ENABLE: s->mode &= ~KBD_MODE_DISABLE_MOUSE; break; case KBD_CCMD_TEST_MOUSE: kbd_queue(s, 0x00, 0); break; case KBD_CCMD_SELF_TEST: s->status |= KBD_STAT_SELFTEST; kbd_queue(s, 0x55, 0); break; case KBD_CCMD_KBD_TEST: kbd_queue(s, 0x00, 0); break; case KBD_CCMD_KBD_DISABLE: s->mode |= KBD_MODE_DISABLE_KBD; kbd_update_irq(s); break; case KBD_CCMD_KBD_ENABLE: s->mode &= ~KBD_MODE_DISABLE_KBD; kbd_update_irq(s); break; case KBD_CCMD_READ_INPORT: kbd_queue(s, 0x00, 0); break; case KBD_CCMD_READ_OUTPORT: /* XXX: check that */ #ifdef TARGET_I386 val = 0x01 | (ioport_get_a20() << 1); #else val = 0x01; #endif if (s->status & KBD_STAT_OBF) val |= 0x10; if (s->status & KBD_STAT_MOUSE_OBF) val |= 0x20; kbd_queue(s, val, 0); break; #ifdef TARGET_I386 case KBD_CCMD_ENABLE_A20: ioport_set_a20(1); break; case KBD_CCMD_DISABLE_A20: ioport_set_a20(0); break; #endif case KBD_CCMD_RESET: qemu_system_reset_request(); break; case 0xff: /* ignore that - I don't know what is its use */ break; default: fprintf(stderr, "qemu: unsupported keyboard cmd=0x%02x\n", val); break; } } static uint32_t kbd_read_data(void *opaque, uint32_t addr) { KBDState *s = opaque; if (s->pending == KBD_PENDING_AUX) return ps2_read_data(s->mouse); return ps2_read_data(s->kbd); } void kbd_write_data(void *opaque, uint32_t addr, uint32_t val) { KBDState *s = opaque; #ifdef DEBUG_KBD printf("kbd: write data=0x%02x\n", val); #endif switch(s->write_cmd) { case 0: ps2_write_keyboard(s->kbd, val); break; case KBD_CCMD_WRITE_MODE: s->mode = val; ps2_keyboard_set_translation(s->kbd, (s->mode & KBD_MODE_KCC) != 0); /* ??? */ kbd_update_irq(s); break; case KBD_CCMD_WRITE_OBUF: kbd_queue(s, val, 0); break; case KBD_CCMD_WRITE_AUX_OBUF: kbd_queue(s, val, 1); break; case KBD_CCMD_WRITE_OUTPORT: #ifdef TARGET_I386 ioport_set_a20((val >> 1) & 1); #endif if (!(val & 1)) { qemu_system_reset_request(); } break; case KBD_CCMD_WRITE_MOUSE: ps2_write_mouse(s->mouse, val); break; default: break; } s->write_cmd = 0; } static void kbd_reset(void *opaque) { KBDState *s = opaque; s->mode = KBD_MODE_KBD_INT | KBD_MODE_MOUSE_INT; s->status = KBD_STAT_CMD | KBD_STAT_UNLOCKED; } static void kbd_save(QEMUFile* f, void* opaque) { KBDState *s = (KBDState*)opaque; qemu_put_8s(f, &s->write_cmd); qemu_put_8s(f, &s->status); qemu_put_8s(f, &s->mode); qemu_put_8s(f, &s->pending); } static int kbd_load(QEMUFile* f, void* opaque, int version_id) { KBDState *s = (KBDState*)opaque; if (version_id != 3) return -EINVAL; qemu_get_8s(f, &s->write_cmd); qemu_get_8s(f, &s->status); qemu_get_8s(f, &s->mode); qemu_get_8s(f, &s->pending); return 0; } void i8042_init(qemu_irq kbd_irq, qemu_irq mouse_irq, uint32_t io_base) { KBDState *s = &kbd_state; s->irq_kbd = kbd_irq; s->irq_mouse = mouse_irq; kbd_reset(s); register_savevm("pckbd", 0, 3, kbd_save, kbd_load, s); register_ioport_read(io_base, 1, 1, kbd_read_data, s); register_ioport_write(io_base, 1, 1, kbd_write_data, s); register_ioport_read(io_base + 4, 1, 1, kbd_read_status, s); register_ioport_write(io_base + 4, 1, 1, kbd_write_command, s); s->kbd = ps2_kbd_init(kbd_update_kbd_irq, s); s->mouse = ps2_mouse_init(kbd_update_aux_irq, s); #ifdef TARGET_I386 vmmouse_init(s->mouse); #endif qemu_register_reset(kbd_reset, s); }