/* * 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 typedef struct { uint8_t aux[KBD_QUEUE_SIZE]; uint8_t data[KBD_QUEUE_SIZE]; int rptr, wptr, count; } KBDQueue; typedef struct KBDState { KBDQueue queue; uint8_t write_cmd; /* if non zero, write data to port 60 is expected */ uint8_t status; uint8_t mode; /* keyboard state */ int kbd_write_cmd; int scan_enabled; /* mouse state */ int mouse_write_cmd; uint8_t mouse_status; uint8_t mouse_resolution; uint8_t mouse_sample_rate; uint8_t mouse_wrap; uint8_t mouse_type; /* 0 = PS2, 3 = IMPS/2, 4 = IMEX */ uint8_t mouse_detect_state; int mouse_dx; /* current values, needed for 'poll' mode */ int mouse_dy; int mouse_dz; uint8_t mouse_buttons; } 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) { KBDQueue *q = &s->queue; int irq12_level, irq1_level; irq1_level = 0; irq12_level = 0; s->status &= ~(KBD_STAT_OBF | KBD_STAT_MOUSE_OBF); if (q->count != 0) { s->status |= KBD_STAT_OBF; if (q->aux[q->rptr]) { s->status |= KBD_STAT_MOUSE_OBF; if (s->mode & KBD_MODE_MOUSE_INT) irq12_level = 1; } else { if ((s->mode & KBD_MODE_KBD_INT) && !(s->mode & KBD_MODE_DISABLE_KBD)) irq1_level = 1; } } pic_set_irq(1, irq1_level); pic_set_irq(12, irq12_level); } static void kbd_queue(KBDState *s, int b, int aux) { KBDQueue *q = &s->queue; #if defined(DEBUG_MOUSE) || defined(DEBUG_KBD) if (aux) printf("mouse event: 0x%02x\n", b); #ifdef DEBUG_KBD else printf("kbd event: 0x%02x\n", b); #endif #endif if (q->count >= KBD_QUEUE_SIZE) return; q->aux[q->wptr] = aux; q->data[q->wptr] = b; if (++q->wptr == KBD_QUEUE_SIZE) q->wptr = 0; q->count++; kbd_update_irq(s); } static void pc_kbd_put_keycode(void *opaque, int keycode) { KBDState *s = opaque; kbd_queue(s, keycode, 0); } 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_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 | (((cpu_single_env->a20_mask >> 20) & 1) << 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: cpu_x86_set_a20(cpu_single_env, 1); break; case KBD_CCMD_DISABLE_A20: cpu_x86_set_a20(cpu_single_env, 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; KBDQueue *q; int val, index, aux; q = &s->queue; if (q->count == 0) { /* NOTE: if no data left, we return the last keyboard one (needed for EMM386) */ /* XXX: need a timer to do things correctly */ index = q->rptr - 1; if (index < 0) index = KBD_QUEUE_SIZE - 1; val = q->data[index]; } else { aux = q->aux[q->rptr]; val = q->data[q->rptr]; if (++q->rptr == KBD_QUEUE_SIZE) q->rptr = 0; q->count--; /* reading deasserts IRQ */ if (aux) pic_set_irq(12, 0); else pic_set_irq(1, 0); } /* reassert IRQs if data left */ kbd_update_irq(s); #ifdef DEBUG_KBD printf("kbd: read data=0x%02x\n", val); #endif return val; } static void kbd_reset_keyboard(KBDState *s) { s->scan_enabled = 1; } static void kbd_write_keyboard(KBDState *s, int val) { switch(s->kbd_write_cmd) { default: case -1: switch(val) { case 0x00: kbd_queue(s, KBD_REPLY_ACK, 0); break; case 0x05: kbd_queue(s, KBD_REPLY_RESEND, 0); break; case KBD_CMD_GET_ID: kbd_queue(s, KBD_REPLY_ACK, 0); kbd_queue(s, 0xab, 0); kbd_queue(s, 0x83, 0); break; case KBD_CMD_ECHO: kbd_queue(s, KBD_CMD_ECHO, 0); break; case KBD_CMD_ENABLE: s->scan_enabled = 1; kbd_queue(s, KBD_REPLY_ACK, 0); break; case KBD_CMD_SET_LEDS: case KBD_CMD_SET_RATE: s->kbd_write_cmd = val; kbd_queue(s, KBD_REPLY_ACK, 0); break; case KBD_CMD_RESET_DISABLE: kbd_reset_keyboard(s); s->scan_enabled = 0; kbd_queue(s, KBD_REPLY_ACK, 0); break; case KBD_CMD_RESET_ENABLE: kbd_reset_keyboard(s); s->scan_enabled = 1; kbd_queue(s, KBD_REPLY_ACK, 0); break; case KBD_CMD_RESET: kbd_reset_keyboard(s); kbd_queue(s, KBD_REPLY_ACK, 0); kbd_queue(s, KBD_REPLY_POR, 0); break; default: kbd_queue(s, KBD_REPLY_ACK, 0); break; } break; case KBD_CMD_SET_LEDS: kbd_queue(s, KBD_REPLY_ACK, 0); s->kbd_write_cmd = -1; break; case KBD_CMD_SET_RATE: kbd_queue(s, KBD_REPLY_ACK, 0); s->kbd_write_cmd = -1; break; } } static void kbd_mouse_send_packet(KBDState *s) { unsigned int b; int dx1, dy1, dz1; dx1 = s->mouse_dx; dy1 = s->mouse_dy; dz1 = s->mouse_dz; /* XXX: increase range to 8 bits ? */ if (dx1 > 127) dx1 = 127; else if (dx1 < -127) dx1 = -127; if (dy1 > 127) dy1 = 127; else if (dy1 < -127) dy1 = -127; b = 0x08 | ((dx1 < 0) << 4) | ((dy1 < 0) << 5) | (s->mouse_buttons & 0x07); kbd_queue(s, b, 1); kbd_queue(s, dx1 & 0xff, 1); kbd_queue(s, dy1 & 0xff, 1); /* extra byte for IMPS/2 or IMEX */ switch(s->mouse_type) { default: break; case 3: if (dz1 > 127) dz1 = 127; else if (dz1 < -127) dz1 = -127; kbd_queue(s, dz1 & 0xff, 1); break; case 4: if (dz1 > 7) dz1 = 7; else if (dz1 < -7) dz1 = -7; b = (dz1 & 0x0f) | ((s->mouse_buttons & 0x18) << 1); kbd_queue(s, b, 1); break; } /* update deltas */ s->mouse_dx -= dx1; s->mouse_dy -= dy1; s->mouse_dz -= dz1; } static void pc_kbd_mouse_event(void *opaque, int dx, int dy, int dz, int buttons_state) { KBDState *s = opaque; /* check if deltas are recorded when disabled */ if (!(s->mouse_status & MOUSE_STATUS_ENABLED)) return; s->mouse_dx += dx; s->mouse_dy -= dy; s->mouse_dz += dz; /* XXX: SDL sometimes generates nul events: we delete them */ if (s->mouse_dx == 0 && s->mouse_dy == 0 && s->mouse_dz == 0 && s->mouse_buttons == buttons_state) return; s->mouse_buttons = buttons_state; if (!(s->mouse_status & MOUSE_STATUS_REMOTE) && (s->queue.count < (KBD_QUEUE_SIZE - 16))) { for(;;) { /* if not remote, send event. Multiple events are sent if too big deltas */ kbd_mouse_send_packet(s); if (s->mouse_dx == 0 && s->mouse_dy == 0 && s->mouse_dz == 0) break; } } } static void kbd_write_mouse(KBDState *s, int val) { #ifdef DEBUG_MOUSE printf("kbd: write mouse 0x%02x\n", val); #endif switch(s->mouse_write_cmd) { default: case -1: /* mouse command */ if (s->mouse_wrap) { if (val == AUX_RESET_WRAP) { s->mouse_wrap = 0; kbd_queue(s, AUX_ACK, 1); return; } else if (val != AUX_RESET) { kbd_queue(s, val, 1); return; } } switch(val) { case AUX_SET_SCALE11: s->mouse_status &= ~MOUSE_STATUS_SCALE21; kbd_queue(s, AUX_ACK, 1); break; case AUX_SET_SCALE21: s->mouse_status |= MOUSE_STATUS_SCALE21; kbd_queue(s, AUX_ACK, 1); break; case AUX_SET_STREAM: s->mouse_status &= ~MOUSE_STATUS_REMOTE; kbd_queue(s, AUX_ACK, 1); break; case AUX_SET_WRAP: s->mouse_wrap = 1; kbd_queue(s, AUX_ACK, 1); break; case AUX_SET_REMOTE: s->mouse_status |= MOUSE_STATUS_REMOTE; kbd_queue(s, AUX_ACK, 1); break; case AUX_GET_TYPE: kbd_queue(s, AUX_ACK, 1); kbd_queue(s, s->mouse_type, 1); break; case AUX_SET_RES: case AUX_SET_SAMPLE: s->mouse_write_cmd = val; kbd_queue(s, AUX_ACK, 1); break; case AUX_GET_SCALE: kbd_queue(s, AUX_ACK, 1); kbd_queue(s, s->mouse_status, 1); kbd_queue(s, s->mouse_resolution, 1); kbd_queue(s, s->mouse_sample_rate, 1); break; case AUX_POLL: kbd_queue(s, AUX_ACK, 1); kbd_mouse_send_packet(s); break; case AUX_ENABLE_DEV: s->mouse_status |= MOUSE_STATUS_ENABLED; kbd_queue(s, AUX_ACK, 1); break; case AUX_DISABLE_DEV: s->mouse_status &= ~MOUSE_STATUS_ENABLED; kbd_queue(s, AUX_ACK, 1); break; case AUX_SET_DEFAULT: s->mouse_sample_rate = 100; s->mouse_resolution = 2; s->mouse_status = 0; kbd_queue(s, AUX_ACK, 1); break; case AUX_RESET: s->mouse_sample_rate = 100; s->mouse_resolution = 2; s->mouse_status = 0; kbd_queue(s, AUX_ACK, 1); kbd_queue(s, 0xaa, 1); kbd_queue(s, s->mouse_type, 1); break; default: break; } break; case AUX_SET_SAMPLE: s->mouse_sample_rate = val; #if 0 /* detect IMPS/2 or IMEX */ switch(s->mouse_detect_state) { default: case 0: if (val == 200) s->mouse_detect_state = 1; break; case 1: if (val == 100) s->mouse_detect_state = 2; else if (val == 200) s->mouse_detect_state = 3; else s->mouse_detect_state = 0; break; case 2: if (val == 80) s->mouse_type = 3; /* IMPS/2 */ s->mouse_detect_state = 0; break; case 3: if (val == 80) s->mouse_type = 4; /* IMEX */ s->mouse_detect_state = 0; break; } #endif kbd_queue(s, AUX_ACK, 1); s->mouse_write_cmd = -1; break; case AUX_SET_RES: s->mouse_resolution = val; kbd_queue(s, AUX_ACK, 1); s->mouse_write_cmd = -1; break; } } 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: kbd_write_keyboard(s, val); break; case KBD_CCMD_WRITE_MODE: s->mode = val; 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 cpu_x86_set_a20(cpu_single_env, (val >> 1) & 1); #endif if (!(val & 1)) { qemu_system_reset_request(); } break; case KBD_CCMD_WRITE_MOUSE: kbd_write_mouse(s, val); break; default: break; } s->write_cmd = 0; } static void kbd_reset(void *opaque) { KBDState *s = opaque; KBDQueue *q; s->kbd_write_cmd = -1; s->mouse_write_cmd = -1; s->mode = KBD_MODE_KBD_INT | KBD_MODE_MOUSE_INT; s->status = KBD_STAT_CMD | KBD_STAT_UNLOCKED; q = &s->queue; q->rptr = 0; q->wptr = 0; q->count = 0; } void kbd_init(void) { KBDState *s = &kbd_state; kbd_reset(s); register_ioport_read(0x60, 1, 1, kbd_read_data, s); register_ioport_write(0x60, 1, 1, kbd_write_data, s); register_ioport_read(0x64, 1, 1, kbd_read_status, s); register_ioport_write(0x64, 1, 1, kbd_write_command, s); qemu_add_kbd_event_handler(pc_kbd_put_keycode, s); qemu_add_mouse_event_handler(pc_kbd_mouse_event, s); qemu_register_reset(kbd_reset, s); }