This patch adds support for TSC-40 driver to inputattach.
Signed-off-by: Christian Gmeiner <christian.gmeiner@xxxxxxxxx>
---
diff -Nur linuxconsoletools-1.4.2/docs/inputattach.1
linuxconsoletools-1.4.2_patched//docs/inputattach.1
--- linuxconsoletools-1.4.2/docs/inputattach.1 2011-08-09
07:35:02.000000000 +0200
+++ linuxconsoletools-1.4.2_patched//docs/inputattach.1 2011-09-27
11:39:28.935479294 +0200
@@ -108,6 +108,9 @@
.BR \-taos ", " \-\-taos\-evm
TAOS evaluation module.
.TP
+.BR \-tsc ", " \-\-tsc
+TSC-10/25/40 touch screen.
+.TP
.BR \-t213 ", " \-\-touchit213
Sahara Touch-iT213 Tablet PC.
.TP
diff -Nur linuxconsoletools-1.4.2/utils/inputattach.c
linuxconsoletools-1.4.2_patched//utils/inputattach.c
--- linuxconsoletools-1.4.2/utils/inputattach.c 2011-08-09
07:43:10.000000000 +0200
+++ linuxconsoletools-1.4.2_patched//utils/inputattach.c 2011-09-27
11:38:01.071479288 +0200
@@ -354,6 +354,82 @@
return 0;
}
+static int tsc40_init(int fd, unsigned long *id, unsigned long *extra)
+{
+ unsigned char cmd[2], data;
+ unsigned int eeprom;
+
+ /* Datasheet can be found here:
+ * http://www.distec.de/PDF/Drivers/DMC/TSC40_Protocol_Description.pdf
+ */
+
+#define TSC40_CMD_DATA1 0x01
+#define TSC40_CMD_RATE 0x05
+#define TSC40_CMD_ID 0x15
+#define TSC40_CMD_RESET 0x55
+
+#define TSC40_RATE_150 0x45
+#define TSC40_NACK 0x15
+
+ /* trigger a software reset to get into a well known state */
+ cmd[0] = TSC40_CMD_RESET;
+ if (write(fd, cmd, 1) != 1)
+ return -1;
+
+ /* wait to settle down */
+ usleep(15 * 1000); /* 15 ms */
+
+ /* read panel ID to check if an EEPROM is used */
+ cmd[0] = TSC40_CMD_ID;
+ if (write(fd, cmd, 1) != 1)
+ return -1;
+
+ if (readchar(fd, &data, 100))
+ return -1;
+
+ /* if bit7 is not set --> EEPROM is used */
+ eeprom = !((data & 0x80) >> 7);
+
+ /* ignore 2nd byte of ID cmd */
+ if (readchar(fd, &data, 100))
+ return -1;
+
+ /* set coordinate oupt rate setting */
+ cmd[0] = TSC40_CMD_RATE;
+ cmd[1] = TSC40_RATE_150;
+ if (write(fd, cmd, 2) != 2)
+ return -1;
+
+ /* read response */
+ if (readchar(fd, &data, 100))
+ return -1;
+
+ if ((data == TSC40_NACK) && (eeprom == 1)) {
+ /* get detailed failure information */
+ if (readchar(fd, &data, 100))
+ return -1;
+
+ switch (data) {
+ case 0x02: /* EEPROM data abnormal */
+ case 0x04: /* EEPROM write error */
+ case 0x08: /* Touch screen not connected */
+ return -1;
+ break;
+
+ default:
+ /* 0x01: EEPROM data empty */
+ break;
+ }
+ }
+
+ /* start sending coordinate informations */
+ cmd[0] = TSC40_CMD_DATA1;
+ if (write(fd, cmd, 1) != 1)
+ return -1;
+
+ return 0;
+}
+
static int t213_init(int fd, unsigned long *id, unsigned long *extra)
{
char cmd[]={0x0a,1,'A'};
@@ -556,6 +632,9 @@
{ "--mtouch", "-mtouch", "MicroTouch (3M) touchscreen",
B9600, CS8 | CRTSCTS,
SERIO_MICROTOUCH, 0x00, 0x00, 0, NULL },
+{ "--tsc", "-tsc", "TSC-10/25/40 serial touchscreen",
+ B9600, CS8,
+ SERIO_TSC40, 0x00, 0x00, 0, tsc40_init },
{ "--touchit213", "-t213", "Sahara Touch-iT213 Tablet PC",
B9600, CS8,
SERIO_TOUCHIT213, 0x00, 0x00, 0, t213_init },
--
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