linux-ezx: Add additional fix to improve the touchscreen behaviour.

1 files changed, 119 insertions, 0 deletions

diff --git a/packages/linux/linux-ezx/wyrm-ts.diff b/packages/linux/linux-ezx/wyrm-ts.diff
new file mode 100644
index 0000000000..a7ec75613c
--- /dev/null
+++ b/packages/linux/linux-ezx/wyrm-ts.diff
@@ -0,0 +1,119 @@
+--- /tmp/pcap_ts.c	2007-02-04 16:55:21.000000000 -0200
++++ linux-2.6.16/drivers/input/touchscreen/pcap_ts.c	2007-02-04 18:47:58.000000000 -0200
+@@ -31,7 +31,7 @@
+ 
+ #include "../../misc/ezx/ssp_pcap.h"
+ 
+-#if 1
++#if 0
+ #define DEBUGP(x, args ...) printk(KERN_DEBUG "%s: " x, __FUNCTION__, ## args)
+ #else
+ #define DEBUGP(x, args ...)
+@@ -39,6 +39,7 @@
+ 
+ #define PRESSURE 1
+ #define COORDINATE 2
++#define STANDBY 3
+ 
+ struct pcap_ts {
+ 	int irq_xy;
+@@ -97,7 +98,7 @@
+ 	int ret;
+ 	u_int32_t tmp;
+ 	DEBUGP("start xy read in mode %s\n", 
+-		pcap_ts->read_state == COORDINATE ? "COORD" : "PRESS");
++		pcap_ts->read_state == COORDINATE ? "COORD" : (pcap_ts->read_state == PRESSURE ? "PRESS" : "STANDBY"));
+ 
+ 	ret = ezx_pcap_read(SSP_PCAP_ADJ_ADC1_REGISTER, &tmp);
+ 	if (ret < 0)
+@@ -122,7 +123,7 @@
+ 	u_int32_t tmp;
+ 
+ 	DEBUGP("get xy value in mode %s\n", 
+-		pcap_ts->read_state == COORDINATE ? "COORD" : "PRESS");
++		pcap_ts->read_state == COORDINATE ? "COORD" : (pcap_ts->read_state == PRESSURE ? "PRESS" : "STANDBY"));
+ 
+ 	ret = ezx_pcap_read(SSP_PCAP_ADJ_ADC2_REGISTER, &tmp);
+ 	if (ret < 0)
+@@ -145,7 +146,16 @@
+ static irqreturn_t pcap_ts_irq_xy(int irq, void *dev_id, struct pt_regs *regs)
+ {
+ 	struct pcap_ts *pcap_ts = dev_id;
++//	DEBUGP("read_state: %d\n", pcap_ts->read_state);
+ 
++	/*
++	 * Ignore further read interrupts after we set STANDBY - WM
++	 */
++	if (pcap_ts->read_state == STANDBY)
++	{
++		DEBUGP("ignored\n");
++		return IRQ_HANDLED;
++	}
+ 	if (pcap_ts_get_xy_value(pcap_ts) < 0) {
+ 		printk("pcap_ts: error reading XY value\n");
+ 		return IRQ_HANDLED;
+@@ -160,33 +170,32 @@
+ 		     pcap_ts->pressure <= PRESSURE_MIN ) &&
+ 		    pcap_ts->pressure == pcap_ts->pressure_last) {
+ 			/* pen has been released */
++			DEBUGP("UP\n");
+ 			input_report_key(pcap_ts->input, BTN_TOUCH, 0);
+-			input_sync(pcap_ts->input);
+-
+ 			input_report_abs(pcap_ts->input, ABS_PRESSURE, 0);
++			input_sync(pcap_ts->input);
+ 
+ 			pcap_ts->x = pcap_ts->y = 0;
+ 
++			/* no need for timer, we'll get interrupted with
++			 * next touch down event */
++			del_timer(&pcap_ts->timer);
++
+ 			/* ask PCAP2 to interrupt us if touch event happens
+ 			 * again */
+-			pcap_ts->read_state = PRESSURE;
++			pcap_ts->read_state = STANDBY;
+ 			pcap_ts_mode(PCAP_TS_STANDBY_MODE);
+ 			ezx_pcap_bit_set(SSP_PCAP_ADJ_BIT_MSR_TSM, 0);
+-
+-			/* no need for timer, we'll get interrupted with
+-			 * next touch down event */
+-			del_timer(&pcap_ts->timer);
+ 		} else {
+ 			/* pen has been touched down */
++			DEBUGP("DOWN\n");
++
+ 			input_report_key(pcap_ts->input, BTN_TOUCH, 1);
+ 			/* don't input_sync(), we don't know position yet */
+ 
+ 			if (pcap_ts->pressure == 0) 
+ 				pcap_ts->pressure = pcap_ts->pressure_last;
+ 
+-			input_report_abs(pcap_ts->input, ABS_PRESSURE,
+-				pcap_ts->pressure);
+-
+ 			/* switch state machine into coordinate read mode */
+ 			pcap_ts->read_state = COORDINATE;
+ 			pcap_ts_mode(PCAP_TS_POSITION_XY_MEASUREMENT);
+@@ -196,18 +205,14 @@
+ 		/* we are in coordinate mode */
+ 		if (pcap_ts->x <= X_AXIS_MIN || pcap_ts->x >= X_AXIS_MAX ||
+ 		    pcap_ts->y <= Y_AXIS_MIN || pcap_ts->y >= Y_AXIS_MAX) {
+-			DEBUGP("invalid x/y coordinate position: PEN_UP?\n");
+-
++			DEBUGP("PEN_UP?\n");
+ 			pcap_ts->pressure = 0;
+-#if 0
+-			input_report_key(pcap_ts->input, BTN_TOUCH, 0);
+-			pcap_ts->x = pcap_ts->y = 0;
+-#endif
+ 		} else {
++			input_report_abs(pcap_ts->input, ABS_PRESSURE, pcap_ts->pressure);
+ 			input_report_abs(pcap_ts->input, ABS_X, pcap_ts->x);
+ 			input_report_abs(pcap_ts->input, ABS_Y, pcap_ts->y);
++			input_sync(pcap_ts->input);
+ 		}
+-		input_sync(pcap_ts->input);
+ 
+ 		/* switch back to pressure read mode */
+ 		pcap_ts->read_state = PRESSURE;