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#ifdef __linux__
#include <linux/input.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <string.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/fcntl.h>
#include <unistd.h>
#include "hid.h"
#define DEBUG(x)
//#define DEBUG(x) x
/*------------------------------------------------------------------------------
* from evtest.c from the ff-utils package
*/
#define BITS_PER_LONG (sizeof(long) * 8)
#define NBITS(x) ((((x)-1)/BITS_PER_LONG)+1)
#define OFF(x) ((x)%BITS_PER_LONG)
#define BIT(x) (1UL<<OFF(x))
#define LONG(x) ((x)/BITS_PER_LONG)
#define test_bit(bit, array) ((array[LONG(bit)] >> OFF(bit)) & 1)
/*
* from an email from Vojtech:
*
* The application reading the device is supposed to queue all events up to
* the SYN_REPORT event, and then process them, so that a mouse pointer
* will move diagonally instead of following the sides of a rectangle,
* which would be very annoying.
*/
t_int hid_get_events(t_hid *x)
{
DEBUG(post("hid_get_events"););
/* for debugging, counts how many events are processed each time hid_read() is called */
t_int i;
DEBUG(t_int event_counter = 0;);
t_int read_bytes;
t_atom event_data[4];
/* this will go into the generic read function declared in hid.h and
* implemented in hid_linux.c
*/
struct input_event hid_input_event;
if (x->x_fd < 0) return 0;
while (read (x->x_fd, &(hid_input_event), sizeof(struct input_event)) > -1)
{
/* build event_data list from event data */
/* type */
SETSYMBOL(event_data, gensym(ev[hid_input_event.type]));
/* code */
SETSYMBOL(event_data + 1, gensym(event_names[hid_input_event.type][hid_input_event.code]));
/* value */
SETFLOAT(event_data + 2, (t_float)hid_input_event.value);
/* time */
SETFLOAT(event_data + 3, (t_float)(hid_input_event.time).tv_sec);
outlet_anything(x->x_obj.te_outlet,atom_gensym(event_data),3,event_data+1);
DEBUG(++event_counter;);
}
DEBUG(
if (event_counter > 0)
post("output %d events",event_counter);
);
return (0);
}
t_int hid_open_device(t_hid *x, t_int device_number)
{
DEBUG(post("hid_open_device"););
char arg[20];
struct input_event hid_input_event;
unsigned long bitmask[EV_MAX][NBITS(KEY_MAX)];
char devicename[256] = "Unknown";
t_int event_type, event_code;
char *event_typeName = "";
/* counts for various event types */
t_int synCount,keyCount,relCount,absCount,mscCount,ledCount,sndCount,repCount,ffCount,pwrCount,ff_statusCount;
x->x_fd = -1;
x->x_device_number = device_number;
sprintf(arg,"/dev/input/event%d",x->x_device_number);
x->x_devname = gensym(arg);
if (x->x_devname)
{
/* open the device read-only, non-exclusive */
x->x_fd = open(x->x_devname->s_name, O_RDONLY | O_NONBLOCK);
/* test if device open */
if (x->x_fd < 0 )
{
error("[hid] open %s failed",x->x_devname->s_name);
x->x_fd = -1;
return 1;
}
}
/* read input_events from the HID_DEVICE stream
* It seems that is just there to flush the input event queue
*/
while (read (x->x_fd, &(hid_input_event), sizeof(struct input_event)) > -1);
/* get name of device */
ioctl(x->x_fd, EVIOCGNAME(sizeof(devicename)), devicename);
post ("\nConfiguring device %d as %s (%s)",
x->x_device_number,devicename,x->x_devname->s_name);
/* get bitmask representing supported events (axes, keys, etc.) */
memset(bitmask, 0, sizeof(bitmask));
ioctl(x->x_fd, EVIOCGBIT(0, EV_MAX), bitmask[0]);
post("\nSupported events:");
/* init all count vars */
synCount = keyCount = relCount = absCount = mscCount = ledCount = 0;
sndCount = repCount = ffCount = pwrCount = ff_statusCount = 0;
/* cycle through all possible event types */
for (event_type = 0; event_type < EV_MAX; event_type++)
{
if (test_bit(event_type, bitmask[0]))
{
/* make pretty names for event types */
switch(event_type)
{
case EV_SYN: event_typeName = "Synchronization"; break;
case EV_KEY: event_typeName = "Keys/Buttons"; break;
case EV_REL: event_typeName = "Relative Axes"; break;
case EV_ABS: event_typeName = "Absolute Axes"; break;
case EV_MSC: event_typeName = "Miscellaneous"; break;
case EV_LED: event_typeName = "LEDs"; break;
case EV_SND: event_typeName = "System Sounds"; break;
case EV_REP: event_typeName = "Autorepeat Values"; break;
case EV_FF: event_typeName = "Force Feedback"; break;
case EV_PWR: event_typeName = "Power"; break;
case EV_FF_STATUS: event_typeName = "Force Feedback Status"; break;
}
post(" %s (%s/type %d) ", event_typeName, ev[event_type] ? ev[event_type] : "?", event_type);
/* get bitmask representing supported button types */
ioctl(x->x_fd, EVIOCGBIT(event_type, KEY_MAX), bitmask[event_type]);
/* cycle through all possible event codes (axes, keys, etc.)
* testing to see which are supported
*/
for (event_code = 0; event_code < KEY_MAX; event_code++)
{
if (test_bit(event_code, bitmask[event_type]))
{
post(" %s (%d)", event_names[event_type] ? (event_names[event_type][event_code] ? event_names[event_type][event_code] : "?") : "?", event_code);
/* post(" Event code %d (%s)", event_code, names[event_type] ? (names[event_type][event_code] ? names[event_type][event_code] : "?") : "?"); */
switch(event_type) {
/*
* the API changed at some point... EV_SYN seems to be the new name
* from "Reset" events to "Syncronization" events
*/
#ifdef EV_RST
case EV_RST: synCount++; break;
#else
case EV_SYN: synCount++; break;
#endif
case EV_KEY: keyCount++; break;
case EV_REL: relCount++; break;
case EV_ABS: absCount++; break;
case EV_MSC: mscCount++; break;
case EV_LED: ledCount++; break;
case EV_SND: sndCount++; break;
case EV_REP: repCount++; break;
case EV_FF: ffCount++; break;
case EV_PWR: pwrCount++; break;
case EV_FF_STATUS: ff_statusCount++; break;
}
}
}
}
}
post("\nDetected:");
if (synCount > 0) post (" %d Sync types",synCount);
if (keyCount > 0) post (" %d Key/Button types",keyCount);
if (relCount > 0) post (" %d Relative Axis types",relCount);
if (absCount > 0) post (" %d Absolute Axis types",absCount);
if (mscCount > 0) post (" %d Misc types",mscCount);
if (ledCount > 0) post (" %d LED types",ledCount);
if (sndCount > 0) post (" %d System Sound types",sndCount);
if (repCount > 0) post (" %d Key Repeat types",repCount);
if (ffCount > 0) post (" %d Force Feedback types",ffCount);
if (pwrCount > 0) post (" %d Power types",pwrCount);
if (ff_statusCount > 0) post (" %d Force Feedback types",ff_statusCount);
return (0);
}
/*
* Under GNU/Linux, the device is a filehandle
*/
t_int hid_close_device(t_hid *x)
{
DEBUG(post("hid_close_device"););
if (x->x_fd <0)
return 0;
else
return (close(x->x_fd));
}
t_int hid_build_device_list(t_hid *x)
{
DEBUG(post("hid_build_device_list"););
/* the device list should be refreshed here */
/*
* since in GNU/Linux the device list is the input event devices
* (/dev/input/event?), nothing needs to be done as of yet to refresh
* the device list. Once the device name can be other things in addition
* the current t_float, then this will probably need to be changed.
*/
return (0);
}
#endif /* #ifdef __linux__ */
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