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[Qemu-devel] [PATCH v2 1/2] ps2: add support of auto-repeat
From: |
Amos Kong |
Subject: |
[Qemu-devel] [PATCH v2 1/2] ps2: add support of auto-repeat |
Date: |
Thu, 23 May 2013 00:10:11 +0800 |
Guest driver sets repeat rate and delay time by KBD_CMD_SET_RATE,
but ps2 backend doesn't process it and no auto-repeat implementation.
This patch adds support of auto-repeat feature. The repeated events
from host are ignored and re-implements ps2's auto-repeat.
Guest ps2 driver sets autorepeat to fastest possible in reset,
period: 250ms, delay: 33ms
Tested by 'sendkey' monitor command.
Tested by Linux & Windows guests with SDL, VNC, SPICE, GTK+
referenced: http://www.computer-engineering.org/ps2keyboard/
Signed-off-by: Amos Kong <address@hidden>
---
hw/input/ps2.c | 41 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 41 insertions(+)
diff --git a/hw/input/ps2.c b/hw/input/ps2.c
index 3412079..8adbb4a 100644
--- a/hw/input/ps2.c
+++ b/hw/input/ps2.c
@@ -94,6 +94,10 @@ typedef struct {
int translate;
int scancode_set; /* 1=XT, 2=AT, 3=PS/2 */
int ledstate;
+ int repeat_period; /* typematic period, ms */
+ int repeat_delay; /* typematic delay, ms */
+ int repeat_key; /* keycode to repeat */
+ QEMUTimer *repeat_timer;
} PS2KbdState;
typedef struct {
@@ -146,6 +150,15 @@ void ps2_queue(void *opaque, int b)
s->update_irq(s->update_arg, 1);
}
+static void repeat_ps2_queue(void *opaque)
+{
+ PS2KbdState *s = opaque;
+
+ qemu_mod_timer(s->repeat_timer, qemu_get_clock_ns(vm_clock) +
+ muldiv64(get_ticks_per_sec(), s->repeat_period, 1000));
+ ps2_queue(&s->common, s->repeat_key);
+}
+
/*
keycode is expressed as follow:
bit 7 - 0 key pressed, 1 = key released
@@ -167,7 +180,23 @@ static void ps2_put_keycode(void *opaque, int keycode)
keycode = ps2_raw_keycode_set3[keycode & 0x7f];
}
}
+
+ /* ignore repeated events from host, re-implement it */
+ if (keycode == s->repeat_key) {
+ return;
+ }
ps2_queue(&s->common, keycode);
+ qemu_del_timer(s->repeat_timer);
+
+ /* only auto-repeat press event */
+ if (!(keycode & 0x80)) {
+ s->repeat_key = keycode;
+ /* delay a while before first repeat */
+ qemu_mod_timer(s->repeat_timer, qemu_get_clock_ns(vm_clock) +
+ muldiv64(get_ticks_per_sec(), s->repeat_delay, 1000));
+ } else {
+ s->repeat_key = -1;
+ }
}
uint32_t ps2_read_data(void *opaque)
@@ -213,6 +242,11 @@ static void ps2_reset_keyboard(PS2KbdState *s)
void ps2_write_keyboard(void *opaque, int val)
{
+ /* repeat period/delay table from kernel (drivers/input/keyboard/atkbd.c)
*/
+ const short period[32] = { 33, 37, 42, 46, 50, 54, 58, 63, 67, 75,
+ 83, 92, 100, 109, 116, 125, 133, 149, 167, 182, 200, 217, 232,
+ 250, 270, 303, 333, 370, 400, 435, 470, 500 };
+ const short delay[4] = { 250, 500, 750, 1000 };
PS2KbdState *s = (PS2KbdState *)opaque;
switch(s->common.write_cmd) {
@@ -288,6 +322,10 @@ void ps2_write_keyboard(void *opaque, int val)
s->common.write_cmd = -1;
break;
case KBD_CMD_SET_RATE:
+ /* Bit0-4 specifies the repeat rate */
+ s->repeat_period = period[val & 0x1f];
+ /* Bit5-6 bit specifies the delay time */
+ s->repeat_delay = delay[val >> 5 & 0x3];
ps2_queue(&s->common, KBD_REPLY_ACK);
s->common.write_cmd = -1;
break;
@@ -536,6 +574,9 @@ static void ps2_kbd_reset(void *opaque)
s->scan_enabled = 0;
s->translate = 0;
s->scancode_set = 0;
+ s->repeat_period = 92;
+ s->repeat_delay = 500;
+ s->repeat_timer = qemu_new_timer_ns(vm_clock, repeat_ps2_queue, s);
}
static void ps2_mouse_reset(void *opaque)
--
1.8.1.4