diff options
Diffstat (limited to 'src/capabilities.c')
| -rw-r--r-- | src/capabilities.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/src/capabilities.c b/src/capabilities.c new file mode 100644 index 0000000..0d11669 --- /dev/null +++ b/src/capabilities.c @@ -0,0 +1,171 @@ +/*************************************************************************** + * + * Multitouch X driver + * Copyright (C) 2008 Henrik Rydberg <rydberg@euromail.se> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + **************************************************************************/ + +#include "capabilities.h" + +#define SETABS(c, x, map, key, fd) \ + (c->has_##x = getbit(map, key) && getabs(&c->x, key, fd)) + +#define ADDCAP(s, c, x) strcat(s, c->has_##x ? " " #x : "") + +static const int SN_COORD = 250; /* coordinate signal-to-noise ratio */ +static const int SN_WIDTH = 100; /* width signal-to-noise ratio */ +static const int SN_ORIENT = 10; /* orientation signal-to-noise ratio */ + +static const int bits_per_long = 8 * sizeof(long); + +static inline int nlongs(int nbit) +{ + return (nbit + bits_per_long - 1) / bits_per_long; +} + +static inline int getbit(const unsigned long *map, int key) +{ + return (map[key / bits_per_long] >> (key % bits_per_long)) & 0x01; +} + +static int getabs(struct input_absinfo *abs, int key, int fd) +{ + int rc; + SYSCALL(rc = ioctl(fd, EVIOCGABS(key), abs)); + return rc >= 0; +} + +static int has_mt_data(const struct Capabilities *cap) +{ + return cap->has_abs[MTDEV_POSITION_X] && cap->has_abs[MTDEV_POSITION_Y]; +} + +static int has_integrated_button(const struct Capabilities *cap) +{ + static const int bcm5974_vmask_ibt = 1; + if (strcmp(cap->devname, "bcm5974")) + return 0; + return cap->devid.version & bcm5974_vmask_ibt; +} + +static void default_fuzz(struct Capabilities *cap, unsigned int code, int sn) +{ + int bit = mtdev_abs2mt(code); + if (cap->has_abs[bit] && cap->abs[bit].fuzz == 0) + cap->abs[bit].fuzz = + (cap->abs[bit].maximum - cap->abs[bit].minimum) / sn; +} + +int read_capabilities(struct Capabilities *cap, int fd) +{ + unsigned long evbits[nlongs(EV_MAX)]; + unsigned long absbits[nlongs(ABS_MAX)]; + unsigned long keybits[nlongs(KEY_MAX)]; + int rc, i; + + memset(cap, 0, sizeof(struct Capabilities)); + + SYSCALL(rc = ioctl(fd, EVIOCGID, &cap->devid)); + if (rc < 0) + return rc; + SYSCALL(rc = ioctl(fd, EVIOCGNAME(sizeof(cap->devname)), cap->devname)); + if (rc < 0) + return rc; + SYSCALL(rc = ioctl(fd, EVIOCGBIT(EV_SYN, sizeof(evbits)), evbits)); + if (rc < 0) + return rc; + SYSCALL(rc = ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keybits)), keybits)); + if (rc < 0) + return rc; + SYSCALL(rc = ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(absbits)), absbits)); + if (rc < 0) + return rc; + + cap->has_left = getbit(keybits, BTN_LEFT); + cap->has_middle = getbit(keybits, BTN_MIDDLE); + cap->has_right = getbit(keybits, BTN_RIGHT); + + SETABS(cap, slot, absbits, ABS_MT_SLOT, fd); + for (i = 0; i < MT_ABS_SIZE; i++) + SETABS(cap, abs[i], absbits, mtdev_mt2abs(i), fd); + + cap->has_mtdata = has_mt_data(cap); + cap->has_ibt = has_integrated_button(cap); + + default_fuzz(cap, ABS_MT_POSITION_X, SN_COORD); + default_fuzz(cap, ABS_MT_POSITION_Y, SN_COORD); + default_fuzz(cap, ABS_MT_TOUCH_MAJOR, SN_WIDTH); + default_fuzz(cap, ABS_MT_TOUCH_MINOR, SN_WIDTH); + default_fuzz(cap, ABS_MT_WIDTH_MAJOR, SN_WIDTH); + default_fuzz(cap, ABS_MT_WIDTH_MINOR, SN_WIDTH); + default_fuzz(cap, ABS_MT_ORIENTATION, SN_ORIENT); + + return 0; +} + +int get_cap_xsize(const struct Capabilities *cap) +{ + const struct input_absinfo *x = &cap->abs[MTDEV_POSITION_X]; + return x->maximum - x->minimum; +} + +int get_cap_ysize(const struct Capabilities *cap) +{ + const struct input_absinfo *y = &cap->abs[MTDEV_POSITION_Y]; + return y->maximum - y->minimum; +} + +int get_cap_wsize(const struct Capabilities *cap) +{ + const struct input_absinfo *w = &cap->abs[MTDEV_TOUCH_MAJOR]; + return w->maximum - w->minimum; +} + +int get_cap_xmid(const struct Capabilities *cap) +{ + const struct input_absinfo *x = &cap->abs[MTDEV_POSITION_X]; + return (x->maximum + x->minimum) >> 1; +} + +int get_cap_ymid(const struct Capabilities *cap) +{ + const struct input_absinfo *y = &cap->abs[MTDEV_POSITION_Y]; + return (y->maximum + y->minimum) >> 1; +} + +void output_capabilities(const struct Capabilities *cap) +{ + char line[1024]; + int i; + memset(line, 0, sizeof(line)); + ADDCAP(line, cap, left); + ADDCAP(line, cap, middle); + ADDCAP(line, cap, right); + ADDCAP(line, cap, mtdata); + ADDCAP(line, cap, ibt); + xf86Msg(X_INFO, "multitouch: devname: %s\n", cap->devname); + xf86Msg(X_INFO, "multitouch: devid: %x %x %x\n", + cap->devid.vendor, cap->devid.product, cap->devid.version); + xf86Msg(X_INFO, "multitouch: caps:%s\n", line); + for (i = 0; i < MT_ABS_SIZE; i++) { + if (cap->has_abs[i]) + xf86Msg(X_INFO, "multitouch: %d: min: %d max: %d\n", + i, + cap->abs[i].minimum, + cap->abs[i].maximum); + } +} |