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input: support analog read

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@937 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2011-12-09 23:58:48 +00:00
parent 23bfd0f2cc
commit 76bc7a1d9a
1 changed files with 58 additions and 13 deletions
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71
platform/linux/in_evdev.c
View file

@ -22,10 +22,12 @@
#include "../common/input.h"
#include "in_evdev.h"
#define MAX_ABS_DEVS 8
typedef struct {
int fd;
int *kbits;
int abs_min_x;
int abs_min_x; /* abs->digital mapping */
int abs_max_x;
int abs_min_y;
int abs_max_y;
@ -34,6 +36,10 @@ typedef struct {
int abs_lasty;
int kc_first;
int kc_last;
unsigned int abs_count;
/* 16.16 multiplier to IN_ABS_RANGE */
unsigned int abs_mult[MAX_ABS_DEVS];
unsigned int abs_to_digital:1;
} in_evdev_t;
#ifndef KEY_CNT
@ -154,7 +160,7 @@ static void in_evdev_probe(void)
for (i = 0;; i++)
{
int support = 0, count = 0;
int u, ret, fd, kc_first = KEY_MAX, kc_last = 0;
int u, ret, fd, kc_first = KEY_MAX, kc_last = 0, have_abs = 0;
in_evdev_t *dev;
char name[64];
@ -195,9 +201,6 @@ static void in_evdev_probe(void)
}
}
if (count == 0 && !in_evdev_allow_abs_only)
goto skip;
dev = calloc(1, sizeof(*dev));
if (dev == NULL)
goto skip;
@ -236,10 +239,20 @@ static void in_evdev_probe(void)
dev->abs_min_y = ainfo.minimum;
dev->abs_max_y = ainfo.maximum;
}
for (u = 0; u < MAX_ABS_DEVS; u++) {
ret = ioctl(fd, EVIOCGABS(u), &ainfo);
if (ret == -1)
break;
dist = ainfo.maximum - ainfo.minimum;
if (dist != 0)
dev->abs_mult[u] = IN_ABS_RANGE * 2 * 65536 / dist;
have_abs = 1;
}
dev->abs_count = u;
}
no_abs:
if (count == 0 && dev->abs_lzone == 0) {
if (count == 0 && !have_abs) {
free(dev);
goto skip;
}
@ -247,6 +260,8 @@ no_abs:
dev->fd = fd;
dev->kc_first = kc_first;
dev->kc_last = kc_last;
if (count > 0 || in_evdev_allow_abs_only)
dev->abs_to_digital = 1;
strcpy(name, IN_EVDEV_PREFIX);
ioctl(fd, EVIOCGNAME(sizeof(name)-6), name+6);
printf("in_evdev: found \"%s\" with %d events (type %08x)\n",
@ -327,14 +342,12 @@ static int in_evdev_update(void *drv_data, const int *binds, int *result)
/* map X and Y absolute to UDLR */
lzone = dev->abs_lzone;
if (lzone != 0) {
if (dev->abs_to_digital && lzone != 0) {
ret = ioctl(dev->fd, EVIOCGABS(ABS_X), &ainfo);
if (ret != -1) {
if (ainfo.value < dev->abs_min_x + lzone) or_binds(binds, KEY_LEFT, result);
if (ainfo.value > dev->abs_max_x - lzone) or_binds(binds, KEY_RIGHT, result);
}
}
if (lzone != 0) {
ret = ioctl(dev->fd, EVIOCGABS(ABS_Y), &ainfo);
if (ret != -1) {
if (ainfo.value < dev->abs_min_y + lzone) or_binds(binds, KEY_UP, result);
@ -345,6 +358,23 @@ static int in_evdev_update(void *drv_data, const int *binds, int *result)
return 0;
}
static int in_evdev_update_analog(void *drv_data, int axis_id, int *result)
{
struct input_absinfo ainfo;
in_evdev_t *dev = drv_data;
int ret;
if ((unsigned int)axis_id >= MAX_ABS_DEVS)
return -1;
ret = ioctl(dev->fd, EVIOCGABS(axis_id), &ainfo);
if (ret != 0)
return ret;
*result = (int)(ainfo.value * dev->abs_mult[axis_id]) >> 16;
return 0;
}
static int in_evdev_set_blocking(in_evdev_t *dev, int y)
{
long flags;
@ -378,6 +408,21 @@ static int in_evdev_set_blocking(in_evdev_t *dev, int y)
return 0;
}
static int in_evdev_get_config(void *drv_data, int what, int *val)
{
in_evdev_t *dev = drv_data;
switch (what) {
case IN_CFG_ABS_AXIS_COUNT:
*val = dev->abs_count;
break;
default:
return -1;
}
return 0;
}
static int in_evdev_set_config(void *drv_data, int what, int val)
{
in_evdev_t *dev = drv_data;
@ -430,7 +475,7 @@ static int in_evdev_update_keycode(void *data, int *is_down)
ret_down = ev.value;
goto out;
}
else if (ev.type == EV_ABS)
else if (ev.type == EV_ABS && dev->abs_to_digital)
{
int lzone = dev->abs_lzone, down = 0, *last;
@ -565,11 +610,9 @@ static int in_evdev_clean_binds(void *drv_data, int *binds, int *def_binds)
// memset(keybits, 0xff, sizeof(keybits)); /* mark all as good */
}
if (dev->abs_lzone != 0) {
if (dev->abs_to_digital && dev->abs_lzone != 0) {
KEYBITS_BIT_SET(KEY_LEFT);
KEYBITS_BIT_SET(KEY_RIGHT);
}
if (dev->abs_lzone != 0) {
KEYBITS_BIT_SET(KEY_UP);
KEYBITS_BIT_SET(KEY_DOWN);
}
@ -594,8 +637,10 @@ static const in_drv_t in_evdev_drv = {
.get_key_names = in_evdev_get_key_names,
.get_def_binds = in_evdev_get_def_binds,
.clean_binds = in_evdev_clean_binds,
.get_config = in_evdev_get_config,
.set_config = in_evdev_set_config,
.update = in_evdev_update,
.update_analog = in_evdev_update_analog,
.update_keycode = in_evdev_update_keycode,
.menu_translate = in_evdev_menu_translate,
};