From: Thomas Diener <die...@gmx.de>
Signed-off-by: Thomas Diener <die...@gmx.de>
---
drivers/input/Makefile | 1 +
drivers/input/polytouch.c | 138 +++++++++++++++++++++++++++++++++++++++++++++
include/polytouch.h | 35 ++++++++++++
3 files changed, 174 insertions(+)
create mode 100644 drivers/input/polytouch.c
create mode 100644 include/polytouch.h
diff --git a/drivers/input/Makefile b/drivers/input/Makefile
index a8e9be2..65c40ba 100644
--- a/drivers/input/Makefile
+++ b/drivers/input/Makefile
@@ -14,3 +14,4 @@ obj-$(CONFIG_PS2MULT) += ps2mult.o ps2ser.o
endif
obj-y += input.o
obj-$(CONFIG_OF_CONTROL) += key_matrix.o
+obj-$(CONFIG_POLYTOUCH) += polytouch.o
\ No newline at end of file
diff --git a/drivers/input/polytouch.c b/drivers/input/polytouch.c
new file mode 100644
index 0000000..9f1f38f
--- /dev/null
+++ b/drivers/input/polytouch.c
@@ -0,0 +1,138 @@
+/*
+ * (c) 2013 Graf-Syteco, Matthias Weisser
+ * <weiss...@arcor.de>
+ *
+ * polytouch.c - EDT PolyTouch capacitive touch sensor controller
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ *
+ */
+
+#include <common.h>
+#include <polytouch.h>
+#include <i2c.h>
+
+
+#define POLYTOUCH_CMD_GETVERSION 0xBB
+#define POLYTOUCH_CMD_GETTOUCH 0xF9
+#define POLYTOUCH_CMD_SETREG 0xFC
+#define POLYTOUCH_CMD_GETREG 0xFC
+
+#define POLYTOUCH_REG_THRESHOLD 0x00
+#define POLYTOUCH_REG_MONITORTIME 0x07
+#define POLYTOUCH_REG_REPORTRATE 0x08
+#define POLYTOUCH_REG_GAIN 0x30
+#define POLYTOUCH_REG_OFFSET 0x31
+#define POLYTOUCH_REG_XRES 0x33
+#define POLYTOUCH_REG_YRES 0x34
+#define POLYTOUCH_REG_HIBERNATE 0x3A
+
+#define POLYTOUCH_PACKET_LENGTH 26
+
+static int xres;
+static int yres;
+
+static int32_t polytouch_set_reg(uint32_t reg, uint32_t val)
+{
+ uint8_t buf[3];
+ int r;
+
+ buf[0] = reg;
+ buf[1] = val;
+ buf[2] = POLYTOUCH_CMD_SETREG ^ buf[0] ^ buf[1];
+
+ r = i2c_write(POLYTOUCH_SA, POLYTOUCH_CMD_SETREG, 1, buf, 3);
+
+ if (0 != r)
+ printf("i2c_write failed with %d\n", r);
+
+ return r;
+}
+
+static int32_t polytouch_get_reg(uint32_t reg)
+{
+ uint8_t buf;
+
+ if (i2c_read(POLYTOUCH_SA, (POLYTOUCH_CMD_GETREG<<8) +
+ ((reg + 0x40)<<0), 2, &buf, 1) == 0)
+ return buf;
+
+ return -1;
+}
+
+int polytouch_init(void)
+{
+ char buf[32];
+
+ if (!i2c_probe(POLYTOUCH_SA)) {
+ if (i2c_read(POLYTOUCH_SA, POLYTOUCH_CMD_GETVERSION, 1,
+ (uint8_t *)buf, 22) == 0) {
+ uint32_t gain = 7;
+ uint32_t threshold = 40;
+ uint32_t offset = 0;
+
+ buf[22] = '\0';
+
+ xres = polytouch_get_reg(POLYTOUCH_REG_XRES) * 64;
+ yres = polytouch_get_reg(POLYTOUCH_REG_YRES) * 64;
+
+ if (0 != strstr(buf, "EP035")) {
+ gain = 3;
+ threshold = 25;
+ offset = 34;
+ } else if (0 != strstr(buf, "EP043")) {
+ gain = 5;
+ threshold = 35;
+ offset = 34;
+ } else if (0 != strstr(buf, "EP057")) {
+ gain = 2;
+ threshold = 25;
+ offset = 34;
+ } else if (0 != strstr(buf, "EP070")) {
+ gain = 2;
+ threshold = 27;
+ offset = 34;
+ }
+
+ polytouch_set_reg(POLYTOUCH_REG_GAIN, gain);
+ polytouch_set_reg(POLYTOUCH_REG_THRESHOLD, threshold);
+ polytouch_set_reg(POLYTOUCH_REG_OFFSET, offset);
+ polytouch_set_reg(POLYTOUCH_REG_REPORTRATE, 8);
+ polytouch_set_reg(POLYTOUCH_REG_MONITORTIME, 0xC8);
+
+ return 1;
+ }
+ }
+ return 0;
+}
+
+void polytouch_get_resolution(struct polytouch_resolution *res)
+{
+ if (NULL != res) {
+ res->x = xres;
+ res->y = yres;
+ }
+}
+
+int polytouch_is_touched(struct polytouch_area *area)
+{
+ if (NULL != area) {
+ uint8_t buf[POLYTOUCH_PACKET_LENGTH];
+ if (0 == i2c_read(POLYTOUCH_SA, POLYTOUCH_CMD_GETTOUCH, 1, buf,
+ POLYTOUCH_PACKET_LENGTH)) {
+ if ((buf[0] == 0xAA) && (buf[1] == 0xAA) &&
+ (buf[2] == 0x1A) && (buf[3] == 0x01)) {
+ uint16_t x;
+ uint16_t y;
+
+ x = ((buf[5] & 0x0F) << 8) + buf[6];
+ y = ((buf[7] & 0x0F) << 8) + buf[8];
+
+ if ((x > area->x1) && (x < area->x2) &&
+ (y > area->y1) && (x < area->y2))
+ return 1;
+ }
+ }
+ }
+ return 0;
+}
diff --git a/include/polytouch.h b/include/polytouch.h
new file mode 100644
index 0000000..f906bbe
--- /dev/null
+++ b/include/polytouch.h
@@ -0,0 +1,35 @@
+/*
+ * (c) 2012 Graf-Syteco, Matthias Weisser
+ * <weiss...@arcor.de>
+ *
+ * polytouch.h - EDT PolyTouch capacitive touch sensor controller
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ *
+ */
+
+#ifndef __POLYTOUCH_H
+#define __POLYTOUCH_H
+
+#define POLYTOUCH_SA 0x38 /* I2C slave address of PolyTouch */
+
+
+struct polytouch_resolution {
+ uint x;
+ uint y;
+};
+
+struct polytouch_area {
+ uint x1; /* Start position x */
+ uint y1; /* Start position y */
+ uint x2; /* End position x */
+ uint y2; /* End position y */
+};
+
+
+int polytouch_init(void);
+void polytouch_get_resolution(struct polytouch_resolution *res);
+int polytouch_is_touched(struct polytouch_area *area);
+
+#endif
+
--
1.7.9.5
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
http://lists.denx.de/mailman/listinfo/u-boot
