Driver stages in place - should one support multiple

device instances by moving the private alloc to init/close?

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>

1 files changed, 90 insertions, 0 deletions

diff --git a/src/hwdata.c b/src/hwdata.c
new file mode 100644
index 0000000..212e860
--- /dev/null
+++ b/src/hwdata.c
@@ -0,0 +1,90 @@
+#include "hwdata.h"
+#include <errno.h>
+
+/******************************************************/
+
+static int parse_event(struct HWData *hw)
+{
+	const struct input_event *ev = hw->event + hw->at++;
+	bool on = ev->value != 0;
+	switch (ev->type) {
+	case EV_SYN:
+		switch (ev->code) {
+		case SYN_REPORT:
+			return 0;
+		}
+		break;
+	case EV_KEY:
+		switch (ev->code) {
+		case BTN_LEFT:
+			hw->left = on;
+			break;
+		case BTN_MIDDLE:
+			hw->middle = on;
+			break;
+		case BTN_RIGHT:
+			hw->right = on;
+			break;
+		case BTN_MT_REPORT_PACKET:
+			if (on)
+				hw->nfinger = 0;
+			break;
+		case BTN_MT_REPORT_FINGER:
+			if (!on && hw->nfinger < DIM_FINGER)
+				hw->nfinger++;
+			break;
+		}
+		break;
+	case EV_ABS:
+		switch (ev->code) {
+		case ABS_MT_TOUCH_MAJOR:
+			hw->finger[hw->nfinger].touch_major = ev->value;
+			break;
+		case ABS_MT_TOUCH_MINOR:
+			hw->finger[hw->nfinger].touch_minor = ev->value;
+			break;
+		case ABS_MT_WIDTH_MAJOR:
+			hw->finger[hw->nfinger].width_major = ev->value;
+			break;
+		case ABS_MT_WIDTH_MINOR:
+			hw->finger[hw->nfinger].width_minor = ev->value;
+			break;
+		case ABS_MT_ORIENTATION:
+			hw->finger[hw->nfinger].orientation = ev->value;
+			break;
+		case ABS_MT_POSITION_X:
+			hw->finger[hw->nfinger].position_x = ev->value;
+			break;
+		case ABS_MT_POSITION_Y:
+			hw->finger[hw->nfinger].position_y = ev->value;
+			break;
+		}
+		break;
+	}
+	return -EAGAIN;
+}
+
+/******************************************************/
+
+int read_hwdata(struct HWData *hw, int fd)
+{
+	int n;
+	do {
+		while (hw->at < hw->nev)
+			if (!parse_event(hw))
+				return 0;
+		n = read(fd, hw->event, sizeof(hw->event));
+		hw->at = 0;
+		hw->nev = n / sizeof(struct input_event);
+		xf86Msg(X_INFO, "multitouch: read: %d %d\n", n, hw->nev);
+	} while (n > 0);
+	return -EIO;
+};
+
+/******************************************************/
+
+void output_hwdata(const struct HWData *hw)
+{
+}
+
+/******************************************************/