Adding Linux event input touch driver

3 files changed, 175 insertions, 0 deletions

diff --git a/drivers/ginput/touch/Linux-Event/driver.mk b/drivers/ginput/touch/Linux-Event/driver.mk
new file mode 100644
index 00000000..20446f99
--- /dev/null
+++ b/drivers/ginput/touch/Linux-Event/driver.mk
@@ -0,0 +1 @@
+GFXSRC += $(GFXLIB)/drivers/ginput/touch/Linux-Event/gmouse_lld_linux_event.c
diff --git a/drivers/ginput/touch/Linux-Event/gmouse_lld_linux_event.c b/drivers/ginput/touch/Linux-Event/gmouse_lld_linux_event.c
new file mode 100644
index 00000000..e1989e03
--- /dev/null
+++ b/drivers/ginput/touch/Linux-Event/gmouse_lld_linux_event.c
@@ -0,0 +1,142 @@
+/*
+ * This file is subject to the terms of the GFX License. If a copy of
+ * the license was not distributed with this file, you can obtain one at:
+ *
+ *              http://ugfx.org/license.html
+ */
+
+#include "gfx.h"
+
+#include <linux/input.h>
+
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdio.h>
+
+#if GFX_USE_GINPUT && GINPUT_NEED_MOUSE
+
+#define GMOUSE_DRIVER_VMT GMOUSEVMT_LINUX_EVENT
+#include "src/ginput/ginput_driver_mouse.h"
+
+// Include the board file
+#include "gmouse_lld_linux_event_board.h"
+
+// Private area definition
+// We need to store the last reading ourselves because we only get events
+// from the Linux system. When touching the touchscreen and then moving around,
+// we only get one z = 1 event. However, the GINPUT module expects z = 1 to be
+// true for the entire touch duration.
+typedef struct privStruct {
+	int fd;
+	GMouseReading lastReading;
+} privStruct;
+
+static bool_t _init(GMouse* m, unsigned driverInstance)
+{
+	(void)driverInstance;
+
+	// Retrive the private area struct
+    privStruct* priv = (privStruct*)(m+1);
+
+	// Open the device
+	priv->fd = open(GMOUSE_LINUX_EVENT_DEVICE, O_RDONLY | O_NONBLOCK);
+	if (priv->fd < 0) {
+		fprintf(stderr, "GINPUT Mouse: Cannot open input device (%s)\n", GMOUSE_LINUX_EVENT_DEVICE);
+		return FALSE;
+	}
+
+	// Initialize
+	priv->lastReading.buttons = 0;
+	priv->lastReading.x = 0;
+	priv->lastReading.y = 0;
+	priv->lastReading.z = 0;
+
+	return TRUE;
+}
+
+static bool_t _read(GMouse* m, GMouseReading* pdr)
+{
+	int i;
+	int rb;
+	struct input_event ev[64];
+	privStruct* priv;
+
+	// Retrive the private area struct
+    priv = (privStruct*)(m+1);
+
+	// Assume not touched
+	pdr->buttons = 0;
+	pdr->z = priv->lastReading.z;
+	pdr->x = priv->lastReading.x;
+	pdr->y = priv->lastReading.y;
+
+	// Read
+	rb = read(priv->fd, ev, sizeof(struct input_event)*64);
+
+	// Parse	
+	if (rb > 0) {
+		for (i = 0;  i < (int)(rb / sizeof(struct input_event)); i++) {
+			if (ev[i].type == EV_KEY && ev[i].code == 330 && ev[i].value == 1) {
+				pdr->z = 1;
+			}
+			else if (ev[i].type == EV_KEY && ev[i].code == 330 && ev[i].value == 0) {
+				pdr->z = 0;
+			}
+			else if (ev[i].type == EV_ABS && ev[i].code == 0 && ev[i].value > 0) {
+				pdr->x = ev[i].value;
+			}
+			else if (ev[i].type == EV_ABS  && ev[i].code == 1 && ev[i].value > 0) {
+				pdr->y = ev[i].value;
+			}
+		}
+	}
+
+	// Store the current reading
+	priv->lastReading.x = pdr->x;
+	priv->lastReading.y = pdr->y;
+	priv->lastReading.z = pdr->z;
+	priv->lastReading.buttons = pdr->buttons;
+	
+	return TRUE;
+}
+
+const GMouseVMT const GMOUSE_DRIVER_VMT[1] = {{
+	{
+		GDRIVER_TYPE_TOUCH,
+		#if GMOUSE_LINUX_EVENT_FINGERMODE
+			GMOUSE_VFLG_DEFAULTFINGER |
+		#endif
+		
+		#if GMOUSE_LINUX_EVENT_SELF_CALIBRATE
+			GMOUSE_VFLG_TOUCH | GMOUSE_VFLG_ONLY_DOWN | GMOUSE_VFLG_POORUPDOWN , 
+		#else
+			GMOUSE_VFLG_TOUCH | GMOUSE_VFLG_ONLY_DOWN | GMOUSE_VFLG_POORUPDOWN |GMOUSE_VFLG_CALIBRATE,
+		#endif
+		sizeof(GMouse) + sizeof(privStruct),
+		_gmouseInitDriver,
+		_gmousePostInitDriver,
+		_gmouseDeInitDriver
+	},
+	1,				// z_max - (currently?) not supported
+	0,				// z_min - (currently?) not supported
+	1,				// z_touchon
+	0,				// z_touchoff
+	{				// pen_jitter
+		0,			// calibrate
+		0,			// click
+		0			// move
+	},
+	{				// finger_jitter
+		0,			// calibrate
+		0,			// click
+		0			// move
+	},
+	_init, 			// init
+	0,				// deinit
+	_read,			// get
+	0,				// calsave
+	0				// calload
+}};
+
+#endif /* GFX_USE_GINPUT && GINPUT_NEED_MOUSE */
+
diff --git a/drivers/ginput/touch/Linux-Event/gmouse_lld_linux_event_board_template.h b/drivers/ginput/touch/Linux-Event/gmouse_lld_linux_event_board_template.h
new file mode 100644
index 00000000..c6bf5a7b
--- /dev/null
+++ b/drivers/ginput/touch/Linux-Event/gmouse_lld_linux_event_board_template.h
@@ -0,0 +1,32 @@
+/*
+ * This file is subject to the terms of the GFX License. If a copy of
+ * the license was not distributed with this file, you can obtain one at:
+ *
+ *              http://ugfx.org/license.html
+ */
+
+#ifndef _GINPUT_LLD_MOUSE_BOARD_H
+#define _GINPUT_LLD_MOUSE_BOARD_H
+
+// Resolution and Accuracy Settings
+#define GMOUSE_LINUX_EVENT_PEN_CALIBRATE_ERROR		8
+#define GMOUSE_LINUX_EVENT_PEN_CLICK_ERROR			6
+#define GMOUSE_LINUX_EVENT_PEN_MOVE_ERROR			4
+#define GMOUSE_LINUX_EVENT_FINGER_CALIBRATE_ERROR	14
+#define GMOUSE_LINUX_EVENT_FINGER_CLICK_ERROR		18
+#define GMOUSE_LINUX_EVENT_FINGER_MOVE_ERROR		14
+
+#define GMOUSE_LINUX_EVENT_NUM_EVENT				64
+
+// The linux device input used for touchscreen
+#define GMOUSE_LINUX_EVENT_DEVICE					"/dev/input/event0"
+
+// Set this to TRUE if you want self-calibration.
+//	NOTE:	This is not as accurate as real calibration.
+//			It requires the orientation of the touch panel to match the display.
+//			It requires the active area of the touch panel to exactly match the display size.
+#define GMOUSE_LINUX_EVENT_SELF_CALIBRATE			FALSE
+
+#define GMOUSE_LINUX_EVENT_FINGERMODE				TRUE
+
+#endif /* _GINPUT_LLD_MOUSE_BOARD_H */