diff options
author | bellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162> | 2005-11-26 10:36:25 +0000 |
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committer | bellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162> | 2005-11-26 10:36:25 +0000 |
commit | 0e43e99c045eb22415a7e52e2f88dbdb8e2d96f5 (patch) | |
tree | d7dc0bdd0517faf3b738637f7234eaf221730bca /hw | |
parent | 98699967b8f49bb0537aab882242b2045bdb05fc (diff) |
PS2 mouse and keyboard separation (Paul Brook)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1660 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'hw')
-rw-r--r-- | hw/ps2.c | 512 |
1 files changed, 512 insertions, 0 deletions
diff --git a/hw/ps2.c b/hw/ps2.c new file mode 100644 index 0000000000..e7c66f648f --- /dev/null +++ b/hw/ps2.c @@ -0,0 +1,512 @@ +/* + * QEMU PS/2 keyboard/mouse 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 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 */ + +/* 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 PS2_QUEUE_SIZE 256 + +typedef struct { + uint8_t data[PS2_QUEUE_SIZE]; + int rptr, wptr, count; +} PS2Queue; + +typedef struct { + PS2Queue queue; + int32_t write_cmd; + void (*update_irq)(void *, int); + void *update_arg; +} PS2State; + +typedef struct { + PS2State common; + int scan_enabled; +} PS2KbdState; + +typedef struct { + PS2State common; + 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; +} PS2MouseState; + +void ps2_queue(void *opaque, int b) +{ + PS2State *s = (PS2State *)opaque; + PS2Queue *q = &s->queue; + + if (q->count >= PS2_QUEUE_SIZE) + return; + q->data[q->wptr] = b; + if (++q->wptr == PS2_QUEUE_SIZE) + q->wptr = 0; + q->count++; + s->update_irq(s->update_arg, 1); +} + +static void ps2_put_keycode(void *opaque, int keycode) +{ + PS2MouseState *s = opaque; + ps2_queue(&s->common, keycode); +} + +uint32_t ps2_read_data(void *opaque) +{ + PS2State *s = (PS2State *)opaque; + PS2Queue *q; + int val, index; + + 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 = PS2_QUEUE_SIZE - 1; + val = q->data[index]; + } else { + val = q->data[q->rptr]; + if (++q->rptr == PS2_QUEUE_SIZE) + q->rptr = 0; + q->count--; + /* reading deasserts IRQ */ + s->update_irq(s->update_arg, 0); + /* reassert IRQs if data left */ + s->update_irq(s->update_arg, q->count != 0); + } + return val; +} + +static void ps2_reset_keyboard(PS2KbdState *s) +{ + s->scan_enabled = 1; +} + +void ps2_write_keyboard(void *opaque, int val) +{ + PS2KbdState *s = (PS2KbdState *)opaque; + + switch(s->common.write_cmd) { + default: + case -1: + switch(val) { + case 0x00: + ps2_queue(&s->common, KBD_REPLY_ACK); + break; + case 0x05: + ps2_queue(&s->common, KBD_REPLY_RESEND); + break; + case KBD_CMD_GET_ID: + ps2_queue(&s->common, KBD_REPLY_ACK); + ps2_queue(&s->common, 0xab); + ps2_queue(&s->common, 0x83); + break; + case KBD_CMD_ECHO: + ps2_queue(&s->common, KBD_CMD_ECHO); + break; + case KBD_CMD_ENABLE: + s->scan_enabled = 1; + ps2_queue(&s->common, KBD_REPLY_ACK); + break; + case KBD_CMD_SET_LEDS: + case KBD_CMD_SET_RATE: + s->common.write_cmd = val; + ps2_queue(&s->common, KBD_REPLY_ACK); + break; + case KBD_CMD_RESET_DISABLE: + ps2_reset_keyboard(s); + s->scan_enabled = 0; + ps2_queue(&s->common, KBD_REPLY_ACK); + break; + case KBD_CMD_RESET_ENABLE: + ps2_reset_keyboard(s); + s->scan_enabled = 1; + ps2_queue(&s->common, KBD_REPLY_ACK); + break; + case KBD_CMD_RESET: + ps2_reset_keyboard(s); + ps2_queue(&s->common, KBD_REPLY_ACK); + ps2_queue(&s->common, KBD_REPLY_POR); + break; + default: + ps2_queue(&s->common, KBD_REPLY_ACK); + break; + } + break; + case KBD_CMD_SET_LEDS: + ps2_queue(&s->common, KBD_REPLY_ACK); + s->common.write_cmd = -1; + break; + case KBD_CMD_SET_RATE: + ps2_queue(&s->common, KBD_REPLY_ACK); + s->common.write_cmd = -1; + break; + } +} + +static void ps2_mouse_send_packet(PS2MouseState *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); + ps2_queue(&s->common, b); + ps2_queue(&s->common, dx1 & 0xff); + ps2_queue(&s->common, dy1 & 0xff); + /* 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; + ps2_queue(&s->common, dz1 & 0xff); + break; + case 4: + if (dz1 > 7) + dz1 = 7; + else if (dz1 < -7) + dz1 = -7; + b = (dz1 & 0x0f) | ((s->mouse_buttons & 0x18) << 1); + ps2_queue(&s->common, b); + break; + } + + /* update deltas */ + s->mouse_dx -= dx1; + s->mouse_dy -= dy1; + s->mouse_dz -= dz1; +} + +static void ps2_mouse_event(void *opaque, + int dx, int dy, int dz, int buttons_state) +{ + PS2MouseState *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->common.queue.count < (PS2_QUEUE_SIZE - 16))) { + for(;;) { + /* if not remote, send event. Multiple events are sent if + too big deltas */ + ps2_mouse_send_packet(s); + if (s->mouse_dx == 0 && s->mouse_dy == 0 && s->mouse_dz == 0) + break; + } + } +} + +void ps2_write_mouse(void *opaque, int val) +{ + PS2MouseState *s = (PS2MouseState *)opaque; +#ifdef DEBUG_MOUSE + printf("kbd: write mouse 0x%02x\n", val); +#endif + switch(s->common.write_cmd) { + default: + case -1: + /* mouse command */ + if (s->mouse_wrap) { + if (val == AUX_RESET_WRAP) { + s->mouse_wrap = 0; + ps2_queue(&s->common, AUX_ACK); + return; + } else if (val != AUX_RESET) { + ps2_queue(&s->common, val); + return; + } + } + switch(val) { + case AUX_SET_SCALE11: + s->mouse_status &= ~MOUSE_STATUS_SCALE21; + ps2_queue(&s->common, AUX_ACK); + break; + case AUX_SET_SCALE21: + s->mouse_status |= MOUSE_STATUS_SCALE21; + ps2_queue(&s->common, AUX_ACK); + break; + case AUX_SET_STREAM: + s->mouse_status &= ~MOUSE_STATUS_REMOTE; + ps2_queue(&s->common, AUX_ACK); + break; + case AUX_SET_WRAP: + s->mouse_wrap = 1; + ps2_queue(&s->common, AUX_ACK); + break; + case AUX_SET_REMOTE: + s->mouse_status |= MOUSE_STATUS_REMOTE; + ps2_queue(&s->common, AUX_ACK); + break; + case AUX_GET_TYPE: + ps2_queue(&s->common, AUX_ACK); + ps2_queue(&s->common, s->mouse_type); + break; + case AUX_SET_RES: + case AUX_SET_SAMPLE: + s->common.write_cmd = val; + ps2_queue(&s->common, AUX_ACK); + break; + case AUX_GET_SCALE: + ps2_queue(&s->common, AUX_ACK); + ps2_queue(&s->common, s->mouse_status); + ps2_queue(&s->common, s->mouse_resolution); + ps2_queue(&s->common, s->mouse_sample_rate); + break; + case AUX_POLL: + ps2_queue(&s->common, AUX_ACK); + ps2_mouse_send_packet(s); + break; + case AUX_ENABLE_DEV: + s->mouse_status |= MOUSE_STATUS_ENABLED; + ps2_queue(&s->common, AUX_ACK); + break; + case AUX_DISABLE_DEV: + s->mouse_status &= ~MOUSE_STATUS_ENABLED; + ps2_queue(&s->common, AUX_ACK); + break; + case AUX_SET_DEFAULT: + s->mouse_sample_rate = 100; + s->mouse_resolution = 2; + s->mouse_status = 0; + ps2_queue(&s->common, AUX_ACK); + break; + case AUX_RESET: + s->mouse_sample_rate = 100; + s->mouse_resolution = 2; + s->mouse_status = 0; + s->mouse_type = 0; + ps2_queue(&s->common, AUX_ACK); + ps2_queue(&s->common, 0xaa); + ps2_queue(&s->common, s->mouse_type); + break; + default: + break; + } + break; + case AUX_SET_SAMPLE: + s->mouse_sample_rate = val; + /* 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; + } + ps2_queue(&s->common, AUX_ACK); + s->common.write_cmd = -1; + break; + case AUX_SET_RES: + s->mouse_resolution = val; + ps2_queue(&s->common, AUX_ACK); + s->common.write_cmd = -1; + break; + } +} + +static void ps2_reset(void *opaque) +{ + PS2State *s = (PS2State *)opaque; + PS2Queue *q; + s->write_cmd = -1; + q = &s->queue; + q->rptr = 0; + q->wptr = 0; + q->count = 0; +} + +static void ps2_kbd_save(QEMUFile* f, void* opaque) +{ + PS2KbdState *s = (PS2KbdState*)opaque; + + qemu_put_be32s(f, &s->common.write_cmd); + qemu_put_be32s(f, &s->scan_enabled); +} + +static void ps2_mouse_save(QEMUFile* f, void* opaque) +{ + PS2MouseState *s = (PS2MouseState*)opaque; + + qemu_put_be32s(f, &s->common.write_cmd); + qemu_put_8s(f, &s->mouse_status); + qemu_put_8s(f, &s->mouse_resolution); + qemu_put_8s(f, &s->mouse_sample_rate); + qemu_put_8s(f, &s->mouse_wrap); + qemu_put_8s(f, &s->mouse_type); + qemu_put_8s(f, &s->mouse_detect_state); + qemu_put_be32s(f, &s->mouse_dx); + qemu_put_be32s(f, &s->mouse_dy); + qemu_put_be32s(f, &s->mouse_dz); + qemu_put_8s(f, &s->mouse_buttons); +} + +static int ps2_kbd_load(QEMUFile* f, void* opaque, int version_id) +{ + PS2KbdState *s = (PS2KbdState*)opaque; + + if (version_id != 1) + return -EINVAL; + qemu_get_be32s(f, &s->common.write_cmd); + qemu_get_be32s(f, &s->scan_enabled); + return 0; +} + +static int ps2_mouse_load(QEMUFile* f, void* opaque, int version_id) +{ + PS2MouseState *s = (PS2MouseState*)opaque; + + if (version_id != 1) + return -EINVAL; + qemu_get_be32s(f, &s->common.write_cmd); + qemu_get_8s(f, &s->mouse_status); + qemu_get_8s(f, &s->mouse_resolution); + qemu_get_8s(f, &s->mouse_sample_rate); + qemu_get_8s(f, &s->mouse_wrap); + qemu_get_8s(f, &s->mouse_type); + qemu_get_8s(f, &s->mouse_detect_state); + qemu_get_be32s(f, &s->mouse_dx); + qemu_get_be32s(f, &s->mouse_dy); + qemu_get_be32s(f, &s->mouse_dz); + qemu_get_8s(f, &s->mouse_buttons); + return 0; +} + +void *ps2_kbd_init(void (*update_irq)(void *, int), void *update_arg) +{ + PS2KbdState *s = (PS2KbdState *)qemu_mallocz(sizeof(PS2KbdState)); + + s->common.update_irq = update_irq; + s->common.update_arg = update_arg; + ps2_reset(&s->common); + register_savevm("ps2kbd", 0, 1, ps2_kbd_save, ps2_kbd_load, s); + qemu_add_kbd_event_handler(ps2_put_keycode, s); + qemu_register_reset(ps2_reset, &s->common); + return s; +} + +void *ps2_mouse_init(void (*update_irq)(void *, int), void *update_arg) +{ + PS2MouseState *s = (PS2MouseState *)qemu_mallocz(sizeof(PS2MouseState)); + + s->common.update_irq = update_irq; + s->common.update_arg = update_arg; + ps2_reset(&s->common); + register_savevm("ps2mouse", 0, 1, ps2_mouse_save, ps2_mouse_load, s); + qemu_add_mouse_event_handler(ps2_mouse_event, s); + qemu_register_reset(ps2_reset, &s->common); + return s; +} |