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Reduce code size and generally clean up the button driver more! * Add 'wheel repeat' functionality to prevent scrolling past the end of lists in a continuous scroll. Can release and resume scrolling to wrap to the top (4g, 5g, nano).

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@9110 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Brandon Low 2006-03-19 01:12:28 +00:00
parent 5650b70517
commit dd5a85839e
1 changed files with 29 additions and 26 deletions
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55
firmware/drivers/button.c
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@ -138,9 +138,7 @@ static inline int ipod_4g_button_read(void)
if ((status & 0x800000ff) == 0x8000001a) {
static int old_wheel_value IDATA_ATTR = -1;
/* NB: highest wheel = 0x5F, clockwise increases */
int new_wheel_value = (status << 9) >> 25;
int wheel_delta = new_wheel_value - old_wheel_value;
static int wheel_repeat = 0;
if (status & 0x100)
btn |= BUTTON_SELECT;
@ -153,37 +151,40 @@ static inline int ipod_4g_button_read(void)
if (status & 0x1000)
btn |= BUTTON_MENU;
if (status & 0x40000000) {
/* NB: highest wheel = 0x5F, clockwise increases */
int new_wheel_value = (status << 9) >> 25;
backlight_on();
/* The queue should have no other events when scrolling */
if (queue_empty(&button_queue)) {
if (queue_empty(&button_queue) && old_wheel_value >= 0) {
if (old_wheel_value >= 0) {
/* This is for later = BUTTON_SCROLL_TOUCH;*/
unsigned long data;
/* This is for later = BUTTON_SCROLL_TOUCH;*/
int wheel_delta = new_wheel_value - old_wheel_value;
unsigned long data;
int wheel_keycode;
if (wheel_delta < -48)
wheel_delta += 96; /* Forward wrapping case */
else if (wheel_delta > 48)
wheel_delta -= 96; /* Backward wrapping case */
if (wheel_delta < -48)
wheel_delta += 96; /* Forward wrapping case */
else if (wheel_delta > 48)
wheel_delta -= 96; /* Backward wrapping case */
if (wheel_delta > 4) {
old_wheel_value = new_wheel_value;
data = (wheel_delta << 16) | new_wheel_value;
queue_post(&button_queue, BUTTON_SCROLL_FWD,
(void *)data);
} else if (wheel_delta < -4) {
old_wheel_value = new_wheel_value;
data = (wheel_delta << 16) | new_wheel_value;
queue_post(&button_queue, BUTTON_SCROLL_BACK,
(void *)data);
}
} else
old_wheel_value = new_wheel_value;
if (wheel_delta > 4) {
wheel_keycode = BUTTON_SCROLL_FWD;
} else if (wheel_delta < -4) {
wheel_keycode = BUTTON_SCROLL_BACK;
} else goto wheel_end;
data = (wheel_delta << 16) | new_wheel_value;
queue_post(&button_queue, wheel_keycode | wheel_repeat,
(void *)data);
if (!wheel_repeat) wheel_repeat = BUTTON_REPEAT;
}
} else if (wheel_delta == 0) {
old_wheel_value = new_wheel_value;
} else if (old_wheel_value >= 0) {
/* scroll wheel up */
old_wheel_value = -1;
wheel_repeat = 0;
}
} else if (status == 0xffffffff) {
@ -191,6 +192,8 @@ static inline int ipod_4g_button_read(void)
}
}
wheel_end:
if ((inl(reg) & 0x8000000) != 0) {
outl(0xffffffff, 0x7000c120);
outl(0xffffffff, 0x7000c124);