input: support analog read

git-svn-id: file:///home/notaz/opt/svn/PicoDrive/platform@937 be3aeb3a-fb24-0410-a615-afba39da0efa

diff --git a/linux/in_evdev.c b/linux/in_evdev.c
index 445f8fd..7dd631e 100644 (file)
--- a/linux/in_evdev.c
+++ b/linux/in_evdev.c
@@ -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,
 };