plugins: add driver for DMC touchscreens

Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Chris Larson <chris_larson@mentor.com>

diff --git a/configure.ac b/configure.ac
index 9ab9654..066d635 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -65,6 +65,7 @@ TSLIB_CHECK_MODULE([h3600], [yes], [Enable building of h3600 raw module (HP iPaq
 TSLIB_CHECK_MODULE([mk712], [yes], [Enable building of mk712 raw module (Hi tachi support)])
 TSLIB_CHECK_MODULE([arctic2], [yes], [Enable building of arctic2 raw module (IBM Arctic II support)])
 TSLIB_CHECK_MODULE([tatung], [yes], [Enable building of tatung raw module (Tatung Webpad support)])
+TSLIB_CHECK_MODULE([dmc], [yes], [Enable building of dmc raw module (HP iPaq DMC support)])
 TSLIB_CHECK_MODULE([input], [yes], [Enable building of generic input raw module (Linux /dev/input/eventN support)])
 
 AC_MSG_CHECKING([where to place modules])

diff --git a/plugins/Makefile.am b/plugins/Makefile.am
index 304141b..b748a65 100644 (file)
--- a/plugins/Makefile.am
+++ b/plugins/Makefile.am
@@ -84,6 +84,12 @@ else
 TATUNG_MODULE =
 endif
 
+if ENABLE_DMC_MODULE
+DMC_MODULE = dmc.la
+else
+DMC_MODULE =
+endif
+
 if ENABLE_INPUT_MODULE
 INPUT_MODULE = input.la
 else
@@ -114,6 +120,7 @@ pluginexec_LTLIBRARIES = \
        $(MK712_MODULE) \
        $(ARCTIC2_MODULE) \
        $(TATUNG_MODULE) \
+       $(DMC_MODULE) \
        $(H2200_LINEAR_MODULE) \
        $(INPUT_MODULE) \
        $(CY8MRLN_PALMPRE_MODULE)
@@ -156,6 +163,9 @@ arctic2_la_LDFLAGS  = -module $(LTVSN)
 tatung_la_SOURCES      = tatung-raw.c
 tatung_la_LDFLAGS      = -module $(LTVSN)
 
+dmc_la_SOURCES         = dmc-raw.c
+dmc_la_LDFLAGS         = -module $(LTVSN)
+
 input_la_SOURCES       = input-raw.c
 input_la_LDFLAGS       = -module $(LTVSN)
 input_la_LIBADD                = $(top_builddir)/src/libts.la

diff --git a/plugins/dmc-raw.c b/plugins/dmc-raw.c
new file mode 100644 (file)
index 0000000..f9f5381
--- /dev/null
+++ b/plugins/dmc-raw.c
@@ -0,0 +1,139 @@
+/*
+ * tslib driver for DMC touchscreens
+ * Copyright (C) 2009 Michael Olbrich, Pengutronix e.K.
+ * some inspiration from the old xf86-input-dmc xorg input driver.
+ *
+ * This file is placed under the LGPL.  Please see the file COPYING for more
+ * details.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <termios.h>
+
+#include "config.h"
+#include "tslib-private.h"
+
+struct tslib_dmc {
+       struct tslib_module_info module;
+
+       int     current_x;
+       int     current_y;
+       int     sane_fd;
+};
+
+int dmc_init_device(struct tsdev *dev)
+{
+       int fd = dev->fd;
+       struct termios t;
+       char buf[1];
+
+       /* flags from the old xorg driver.
+        * I have no idea what all of these mean but it works (tm). */
+       tcgetattr(fd, &t);
+       t.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON|IXOFF);
+
+       t.c_oflag &= ~OPOST;
+
+       t.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
+
+       t.c_cflag &= ~(CSIZE|PARENB|CSTOPB);
+       t.c_cflag |= CS8|CLOCAL;
+
+       cfsetispeed (&t, B9600);
+       cfsetospeed (&t, B9600);
+
+       t.c_cc[VMIN] = 3;
+       t.c_cc[VTIME] = 1;
+
+       tcsetattr(fd, TCSANOW, &t);
+
+       if (write(fd, "\x55", 1) != 1) {
+               fprintf(stderr, "dmc: failed to write. Check permissions of the device!\n");
+               return EINVAL;
+       }
+       sleep(1);
+       if (write(fd, "\x05\x40", 2) != 2) {
+               perror("dmc write");
+               goto fail;
+       }
+       if (read(fd, buf, 1) != 1) {
+               perror("dmc read");
+               goto fail;
+       }
+       if (buf[0] != 0x6) {
+               fprintf(stderr, "dmc: got wrong return value. The touchscreen may not work.\n");
+       }
+       if (write(fd, "\x31", 1) != 1) {
+               perror("dmc write");
+               goto fail;
+       }
+       return 0;
+fail:
+       fprintf(stderr, "dmc: selected device is not a touchscreen I understand\n");
+       return EINVAL;
+}
+
+static int dmc_read(struct tslib_module_info *inf, struct ts_sample *samp, int nr)
+{
+       struct tslib_dmc *dmc = (struct tslib_dmc*)inf;
+       struct tsdev *ts = inf->dev;
+       uint8_t buf[5];
+       int ret;
+       int i;
+
+       for (i = 0; i < nr; ++i) {
+               if ((ret = read(ts->fd, buf, 1)) != 1) {
+                       --i;
+                       break;
+               }
+               if (buf[0] == 0x10) {
+                       /* release. No coords follow. Use old values */
+                       samp->x = dmc->current_x;
+                       samp->y = dmc->current_y;
+                       samp->pressure = 0;
+               }
+               else if (buf[0] == 0x11) {
+                       /* read coords */
+                       if ((ret = read(ts->fd, buf, 4)) != 4) {
+                               /* must have 4 bytes */
+                               --i;
+                               break;
+                       }
+                       samp->x = dmc->current_x = (int)((buf[0] << 8) + buf[1]);
+                       samp->y = dmc->current_y = (int)((buf[2] << 8) + buf[3]);
+                       samp->pressure = 100;
+               }
+               else
+                       continue;
+#ifdef DEBUG
+               fprintf(stderr,"RAW---------------------------> %d %d %d\n",samp->x,samp->y,samp->pressure);
+#endif /*DEBUG*/
+               gettimeofday(&samp->tv,NULL);
+               ++samp;
+       }
+       return i;
+}
+
+static const struct tslib_ops dmc_ops =
+{
+       .read   = dmc_read,
+};
+
+TSAPI struct tslib_module_info *mod_init(struct tsdev *dev, const char *params)
+{
+       struct tslib_dmc *m;
+
+       if (dmc_init_device(dev) != 0)
+               return 0;
+
+       m = calloc(1, sizeof(struct tslib_dmc));
+       if (m == NULL)
+               return NULL;
+
+       m->module.ops = &dmc_ops;
+       return (struct tslib_module_info*)m;
+}