mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-25 09:17:42 +02:00
43d9b85117
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@25746 3c298f89-4303-0410-b956-a3cf2f4a3e73
1040 lines
29 KiB
Diff
1040 lines
29 KiB
Diff
---
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drivers/input/touchscreen/Kconfig | 11
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drivers/input/touchscreen/Makefile | 1
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drivers/input/touchscreen/tsc2005.c | 958 ++++++++++++++++++++++++++++++++++++
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include/linux/spi/tsc2005.h | 30 +
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4 files changed, 1000 insertions(+)
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Index: linux-2.6.38-rc6/drivers/input/touchscreen/Kconfig
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===================================================================
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--- linux-2.6.38-rc6.orig/drivers/input/touchscreen/Kconfig 2011-02-22 02:25:52.000000000 +0100
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+++ linux-2.6.38-rc6/drivers/input/touchscreen/Kconfig 2011-02-24 00:23:46.456893349 +0100
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@@ -629,6 +629,17 @@
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To compile this driver as a module, choose M here: the
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module will be called touchit213.
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+config TOUCHSCREEN_TSC2005
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+ tristate "TSC2005 based touchscreens"
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+ depends on SPI_MASTER
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+ help
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+ Say Y here if you have a TSC2005 based touchscreen.
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+
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+ If unsure, say N.
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+
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+ To compile this driver as a module, choose M here: the
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+ module will be called tsc2005.
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+
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config TOUCHSCREEN_TSC2007
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tristate "TSC2007 based touchscreens"
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depends on I2C
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Index: linux-2.6.38-rc6/drivers/input/touchscreen/Makefile
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===================================================================
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--- linux-2.6.38-rc6.orig/drivers/input/touchscreen/Makefile 2011-02-22 02:25:52.000000000 +0100
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+++ linux-2.6.38-rc6/drivers/input/touchscreen/Makefile 2011-02-24 00:23:46.457893305 +0100
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@@ -45,6 +45,7 @@
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obj-$(CONFIG_TOUCHSCREEN_TOUCHIT213) += touchit213.o
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obj-$(CONFIG_TOUCHSCREEN_TOUCHRIGHT) += touchright.o
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obj-$(CONFIG_TOUCHSCREEN_TOUCHWIN) += touchwin.o
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+obj-$(CONFIG_TOUCHSCREEN_TSC2005) += tsc2005.o
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obj-$(CONFIG_TOUCHSCREEN_TSC2007) += tsc2007.o
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obj-$(CONFIG_TOUCHSCREEN_UCB1400) += ucb1400_ts.o
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obj-$(CONFIG_TOUCHSCREEN_WACOM_W8001) += wacom_w8001.o
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Index: linux-2.6.38-rc6/drivers/input/touchscreen/tsc2005.c
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===================================================================
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--- /dev/null 1970-01-01 00:00:00.000000000 +0000
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+++ linux-2.6.38-rc6/drivers/input/touchscreen/tsc2005.c 2011-02-24 00:23:46.459893217 +0100
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@@ -0,0 +1,958 @@
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+/*
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+ * TSC2005 touchscreen driver
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+ *
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+ * Copyright (C) 2006-2008 Nokia Corporation
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+ *
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+ * Author: Lauri Leukkunen <lauri.leukkunen@nokia.com>
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+ * based on TSC2301 driver by Klaus K. Pedersen <klaus.k.pedersen@nokia.com>
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2 of the License, or
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+ * (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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+ *
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+ */
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+
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+#include <linux/kernel.h>
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+#include <linux/module.h>
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+#include <linux/input.h>
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+#include <linux/interrupt.h>
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+#include <linux/delay.h>
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+#include <linux/spi/spi.h>
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+
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+#include <linux/spi/tsc2005.h>
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+
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+/**
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+ * The touchscreen interface operates as follows:
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+ *
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+ * Initialize:
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+ * Request access to GPIO103 (DAV)
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+ * tsc2005_ts_irq_handler will trigger when DAV line goes down
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+ *
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+ * 1) Pen is pressed against touchscreeen
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+ * 2) TSC2005 performs AD conversion
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+ * 3) After the conversion is done TSC2005 drives DAV line down
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+ * 4) GPIO IRQ is received and tsc2005_ts_irq_handler is called
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+ * 5) tsc2005_ts_irq_handler queues up an spi transfer to fetch
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+ * the x, y, z1, z2 values
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+ * 6) tsc2005_ts_rx() reports coordinates to input layer and
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+ * sets up tsc2005_ts_timer() to be called after TSC2005_TS_SCAN_TIME
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+ * 7) When the penup_timer expires, there have not been DAV interrupts
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+ * during the last 20ms which means the pen has been lifted.
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+ */
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+
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+#define TSC2005_VDD_LOWER_27
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+
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+#ifdef TSC2005_VDD_LOWER_27
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+#define TSC2005_HZ (10000000)
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+#else
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+#define TSC2005_HZ (25000000)
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+#endif
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+
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+#define TSC2005_CMD (0x80)
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+#define TSC2005_REG (0x00)
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+
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+#define TSC2005_CMD_STOP (1)
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+#define TSC2005_CMD_10BIT (0 << 2)
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+#define TSC2005_CMD_12BIT (1 << 2)
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+
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+#define TSC2005_CMD_SCAN_XYZZ (0 << 3)
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+#define TSC2005_CMD_SCAN_XY (1 << 3)
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+#define TSC2005_CMD_SCAN_X (2 << 3)
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+#define TSC2005_CMD_SCAN_Y (3 << 3)
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+#define TSC2005_CMD_SCAN_ZZ (4 << 3)
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+#define TSC2005_CMD_AUX_SINGLE (5 << 3)
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+#define TSC2005_CMD_TEMP1 (6 << 3)
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+#define TSC2005_CMD_TEMP2 (7 << 3)
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+#define TSC2005_CMD_AUX_CONT (8 << 3)
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+#define TSC2005_CMD_TEST_X_CONN (9 << 3)
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+#define TSC2005_CMD_TEST_Y_CONN (10 << 3)
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+#define TSC2005_CMD_TEST_SHORT (11 << 3)
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+/* command 12 reserved, according to 2008-03 erratum */
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+#define TSC2005_CMD_DRIVE_XX (13 << 3)
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+#define TSC2005_CMD_DRIVE_YY (14 << 3)
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+#define TSC2005_CMD_DRIVE_YX (15 << 3)
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+
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+#define TSC2005_REG_X (0 << 3)
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+#define TSC2005_REG_Y (1 << 3)
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+#define TSC2005_REG_Z1 (2 << 3)
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+#define TSC2005_REG_Z2 (3 << 3)
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+#define TSC2005_REG_AUX (4 << 3)
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+#define TSC2005_REG_TEMP1 (5 << 3)
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+#define TSC2005_REG_TEMP2 (6 << 3)
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+#define TSC2005_REG_STATUS (7 << 3)
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+#define TSC2005_REG_AUX_HIGH (8 << 3)
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+#define TSC2005_REG_AUX_LOW (9 << 3)
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+#define TSC2005_REG_TEMP_HIGH (10 << 3)
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+#define TSC2005_REG_TEMP_LOW (11 << 3)
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+#define TSC2005_REG_CFR0 (12 << 3)
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+#define TSC2005_REG_CFR1 (13 << 3)
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+#define TSC2005_REG_CFR2 (14 << 3)
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+#define TSC2005_REG_FUNCTION (15 << 3)
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+
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+#define TSC2005_REG_PND0 (1 << 1)
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+#define TSC2005_REG_READ (0x01)
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+#define TSC2005_REG_WRITE (0x00)
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+
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+
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+#define TSC2005_CFR0_LONGSAMPLING (1)
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+#define TSC2005_CFR0_DETECTINWAIT (1 << 1)
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+#define TSC2005_CFR0_SENSETIME_32US (0)
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+#define TSC2005_CFR0_SENSETIME_96US (1 << 2)
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+#define TSC2005_CFR0_SENSETIME_544US (1 << 3)
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+#define TSC2005_CFR0_SENSETIME_2080US (1 << 4)
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+#define TSC2005_CFR0_SENSETIME_2656US (0x001C)
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+#define TSC2005_CFR0_PRECHARGE_20US (0x0000)
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+#define TSC2005_CFR0_PRECHARGE_84US (0x0020)
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+#define TSC2005_CFR0_PRECHARGE_276US (0x0040)
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+#define TSC2005_CFR0_PRECHARGE_1044US (0x0080)
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+#define TSC2005_CFR0_PRECHARGE_1364US (0x00E0)
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+#define TSC2005_CFR0_STABTIME_0US (0x0000)
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+#define TSC2005_CFR0_STABTIME_100US (0x0100)
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+#define TSC2005_CFR0_STABTIME_500US (0x0200)
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+#define TSC2005_CFR0_STABTIME_1MS (0x0300)
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+#define TSC2005_CFR0_STABTIME_5MS (0x0400)
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+#define TSC2005_CFR0_STABTIME_100MS (0x0700)
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+#define TSC2005_CFR0_CLOCK_4MHZ (0x0000)
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+#define TSC2005_CFR0_CLOCK_2MHZ (0x0800)
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+#define TSC2005_CFR0_CLOCK_1MHZ (0x1000)
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+#define TSC2005_CFR0_RESOLUTION12 (0x2000)
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+#define TSC2005_CFR0_STATUS (0x4000)
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+#define TSC2005_CFR0_PENMODE (0x8000)
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+
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+#define TSC2005_CFR0_INITVALUE (TSC2005_CFR0_STABTIME_1MS | \
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+ TSC2005_CFR0_CLOCK_1MHZ | \
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+ TSC2005_CFR0_RESOLUTION12 | \
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+ TSC2005_CFR0_PRECHARGE_276US | \
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+ TSC2005_CFR0_PENMODE)
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+
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+/* Bits common to both read and write of config register 0 */
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+#define TSC2005_CFR0_RW_MASK 0x3fff
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+
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+#define TSC2005_CFR1_BATCHDELAY_0MS (0x0000)
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+#define TSC2005_CFR1_BATCHDELAY_1MS (0x0001)
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+#define TSC2005_CFR1_BATCHDELAY_2MS (0x0002)
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+#define TSC2005_CFR1_BATCHDELAY_4MS (0x0003)
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+#define TSC2005_CFR1_BATCHDELAY_10MS (0x0004)
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+#define TSC2005_CFR1_BATCHDELAY_20MS (0x0005)
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+#define TSC2005_CFR1_BATCHDELAY_40MS (0x0006)
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+#define TSC2005_CFR1_BATCHDELAY_100MS (0x0007)
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+
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+#define TSC2005_CFR1_INITVALUE (TSC2005_CFR1_BATCHDELAY_4MS)
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+
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+#define TSC2005_CFR2_MAVE_TEMP (0x0001)
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+#define TSC2005_CFR2_MAVE_AUX (0x0002)
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+#define TSC2005_CFR2_MAVE_Z (0x0004)
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+#define TSC2005_CFR2_MAVE_Y (0x0008)
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+#define TSC2005_CFR2_MAVE_X (0x0010)
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+#define TSC2005_CFR2_AVG_1 (0x0000)
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+#define TSC2005_CFR2_AVG_3 (0x0400)
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+#define TSC2005_CFR2_AVG_7 (0x0800)
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+#define TSC2005_CFR2_MEDIUM_1 (0x0000)
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+#define TSC2005_CFR2_MEDIUM_3 (0x1000)
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+#define TSC2005_CFR2_MEDIUM_7 (0x2000)
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+#define TSC2005_CFR2_MEDIUM_15 (0x3000)
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+
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+#define TSC2005_CFR2_IRQ_MASK (0xC000)
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+#define TSC2005_CFR2_IRQ_DAV (0x4000)
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+#define TSC2005_CFR2_IRQ_PEN (0x8000)
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+#define TSC2005_CFR2_IRQ_PENDAV (0x0000)
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+
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+#define TSC2005_CFR2_INITVALUE (TSC2005_CFR2_IRQ_PENDAV | \
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+ TSC2005_CFR2_MAVE_X | \
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+ TSC2005_CFR2_MAVE_Y | \
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+ TSC2005_CFR2_MAVE_Z | \
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+ TSC2005_CFR2_MEDIUM_15 | \
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+ TSC2005_CFR2_AVG_7)
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+
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+#define MAX_12BIT ((1 << 12) - 1)
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+#define TS_SAMPLES 4
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+#define TSC2005_TS_PENUP_TIME 40
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+
|
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+static const u32 tsc2005_read_reg[] = {
|
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+ (TSC2005_REG | TSC2005_REG_X | TSC2005_REG_READ) << 16,
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+ (TSC2005_REG | TSC2005_REG_Y | TSC2005_REG_READ) << 16,
|
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+ (TSC2005_REG | TSC2005_REG_Z1 | TSC2005_REG_READ) << 16,
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+ (TSC2005_REG | TSC2005_REG_Z2 | TSC2005_REG_READ) << 16,
|
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+};
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+#define NUM_READ_REGS (sizeof(tsc2005_read_reg)/sizeof(tsc2005_read_reg[0]))
|
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+
|
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+struct tsc2005 {
|
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+ struct spi_device *spi;
|
|
+
|
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+ struct input_dev *idev;
|
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+ char phys[32];
|
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+ struct timer_list penup_timer;
|
|
+
|
|
+ /* ESD recovery via a hardware reset if the tsc2005
|
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+ * doesn't respond after a configurable period (in ms) of
|
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+ * IRQ/SPI inactivity. If esd_timeout is 0, timer and work
|
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+ * fields are used.
|
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+ */
|
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+ u32 esd_timeout;
|
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+ struct timer_list esd_timer;
|
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+ struct work_struct esd_work;
|
|
+
|
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+ spinlock_t lock;
|
|
+ struct mutex mutex;
|
|
+
|
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+ struct spi_message read_msg;
|
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+ struct spi_transfer read_xfer[NUM_READ_REGS];
|
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+ u32 data[NUM_READ_REGS];
|
|
+
|
|
+ /* previously reported x,y,p (if pen_down) */
|
|
+ int out_x;
|
|
+ int out_y;
|
|
+ int out_p;
|
|
+ /* fudge parameters - changes must exceed one of these. */
|
|
+ int fudge_x;
|
|
+ int fudge_y;
|
|
+ int fudge_p;
|
|
+ /* raw copy of previous x,y,z */
|
|
+ int in_x;
|
|
+ int in_y;
|
|
+ int in_z1;
|
|
+ int in_z2;
|
|
+ /* average accumulators for each component */
|
|
+ int sample_cnt;
|
|
+ int avg_x;
|
|
+ int avg_y;
|
|
+ int avg_z1;
|
|
+ int avg_z2;
|
|
+ /* configuration */
|
|
+ int x_plate_ohm;
|
|
+ int hw_avg_max;
|
|
+ int stab_time;
|
|
+ int p_max;
|
|
+ int touch_pressure;
|
|
+ /* status */
|
|
+ u8 sample_sent;
|
|
+ u8 pen_down;
|
|
+ u8 disabled;
|
|
+ u8 disable_depth;
|
|
+ u8 spi_pending;
|
|
+
|
|
+ void (*set_reset)(bool enable);
|
|
+};
|
|
+
|
|
+static void tsc2005_cmd(struct tsc2005 *ts, u8 cmd)
|
|
+{
|
|
+ u8 data = TSC2005_CMD | TSC2005_CMD_12BIT | cmd;
|
|
+ struct spi_message msg;
|
|
+ struct spi_transfer xfer = { 0 };
|
|
+
|
|
+ xfer.tx_buf = &data;
|
|
+ xfer.rx_buf = NULL;
|
|
+ xfer.len = 1;
|
|
+ xfer.bits_per_word = 8;
|
|
+
|
|
+ spi_message_init(&msg);
|
|
+ spi_message_add_tail(&xfer, &msg);
|
|
+ spi_sync(ts->spi, &msg);
|
|
+}
|
|
+
|
|
+static void tsc2005_write(struct tsc2005 *ts, u8 reg, u16 value)
|
|
+{
|
|
+ u32 tx;
|
|
+ struct spi_message msg;
|
|
+ struct spi_transfer xfer = { 0 };
|
|
+
|
|
+ tx = (TSC2005_REG | reg | TSC2005_REG_PND0 |
|
|
+ TSC2005_REG_WRITE) << 16;
|
|
+ tx |= value;
|
|
+
|
|
+ xfer.tx_buf = &tx;
|
|
+ xfer.rx_buf = NULL;
|
|
+ xfer.len = 4;
|
|
+ xfer.bits_per_word = 24;
|
|
+
|
|
+ spi_message_init(&msg);
|
|
+ spi_message_add_tail(&xfer, &msg);
|
|
+ spi_sync(ts->spi, &msg);
|
|
+}
|
|
+
|
|
+static void tsc2005_read(struct tsc2005 *ts, u8 reg, u16 *value)
|
|
+{
|
|
+ u32 tx;
|
|
+ u32 rx = 0;
|
|
+ struct spi_message msg;
|
|
+ struct spi_transfer xfer = { 0 };
|
|
+
|
|
+ tx = (TSC2005_REG | reg | TSC2005_REG_READ) << 16;
|
|
+
|
|
+ xfer.tx_buf = &tx;
|
|
+ xfer.rx_buf = ℞
|
|
+ xfer.len = 4;
|
|
+ xfer.bits_per_word = 24;
|
|
+
|
|
+ spi_message_init(&msg);
|
|
+ spi_message_add_tail(&xfer, &msg);
|
|
+ spi_sync(ts->spi, &msg);
|
|
+ *value = rx;
|
|
+}
|
|
+
|
|
+static void tsc2005_ts_update_pen_state(struct tsc2005 *ts,
|
|
+ int x, int y, int pressure)
|
|
+{
|
|
+ if (pressure) {
|
|
+ input_report_abs(ts->idev, ABS_X, x);
|
|
+ input_report_abs(ts->idev, ABS_Y, y);
|
|
+ input_report_abs(ts->idev, ABS_PRESSURE, pressure);
|
|
+ if (!ts->pen_down) {
|
|
+ input_report_key(ts->idev, BTN_TOUCH, 1);
|
|
+ ts->pen_down = 1;
|
|
+ }
|
|
+ } else {
|
|
+ input_report_abs(ts->idev, ABS_PRESSURE, 0);
|
|
+ if (ts->pen_down) {
|
|
+ input_report_key(ts->idev, BTN_TOUCH, 0);
|
|
+ ts->pen_down = 0;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ input_sync(ts->idev);
|
|
+}
|
|
+
|
|
+/*
|
|
+ * This function is called by the SPI framework after the coordinates
|
|
+ * have been read from TSC2005
|
|
+ */
|
|
+static void tsc2005_ts_rx(void *arg)
|
|
+{
|
|
+ struct tsc2005 *ts = arg;
|
|
+ unsigned long flags;
|
|
+ int inside_rect, pressure_limit;
|
|
+ int x, y, z1, z2, pressure;
|
|
+
|
|
+ spin_lock_irqsave(&ts->lock, flags);
|
|
+
|
|
+ if (ts->disable_depth) {
|
|
+ ts->spi_pending = 0;
|
|
+ goto out;
|
|
+ }
|
|
+
|
|
+ x = ts->data[0];
|
|
+ y = ts->data[1];
|
|
+ z1 = ts->data[2];
|
|
+ z2 = ts->data[3];
|
|
+
|
|
+ /* validate pressure and position */
|
|
+ if (x > MAX_12BIT || y > MAX_12BIT)
|
|
+ goto out;
|
|
+
|
|
+ /* skip coords if the pressure-components are out of range */
|
|
+ if (z1 < 100 || z2 > MAX_12BIT || z1 >= z2)
|
|
+ goto out;
|
|
+
|
|
+ /* skip point if this is a pen down with the exact same values as
|
|
+ * the value before pen-up - that implies SPI fed us stale data
|
|
+ */
|
|
+ if (!ts->pen_down &&
|
|
+ ts->in_x == x &&
|
|
+ ts->in_y == y &&
|
|
+ ts->in_z1 == z1 &&
|
|
+ ts->in_z2 == z2)
|
|
+ goto out;
|
|
+
|
|
+ /* At this point we are happy we have a valid and useful reading.
|
|
+ * Remember it for later comparisons. We may now begin downsampling
|
|
+ */
|
|
+ ts->in_x = x;
|
|
+ ts->in_y = y;
|
|
+ ts->in_z1 = z1;
|
|
+ ts->in_z2 = z2;
|
|
+
|
|
+ /* don't run average on the "pen down" event */
|
|
+ if (ts->sample_sent) {
|
|
+ ts->avg_x += x;
|
|
+ ts->avg_y += y;
|
|
+ ts->avg_z1 += z1;
|
|
+ ts->avg_z2 += z2;
|
|
+
|
|
+ if (++ts->sample_cnt < TS_SAMPLES)
|
|
+ goto out;
|
|
+
|
|
+ x = ts->avg_x / TS_SAMPLES;
|
|
+ y = ts->avg_y / TS_SAMPLES;
|
|
+ z1 = ts->avg_z1 / TS_SAMPLES;
|
|
+ z2 = ts->avg_z2 / TS_SAMPLES;
|
|
+ }
|
|
+
|
|
+ ts->sample_cnt = 0;
|
|
+ ts->avg_x = 0;
|
|
+ ts->avg_y = 0;
|
|
+ ts->avg_z1 = 0;
|
|
+ ts->avg_z2 = 0;
|
|
+
|
|
+ pressure = x * (z2 - z1) / z1;
|
|
+ pressure = pressure * ts->x_plate_ohm / 4096;
|
|
+
|
|
+ pressure_limit = ts->sample_sent ? ts->p_max : ts->touch_pressure;
|
|
+ if (pressure > pressure_limit)
|
|
+ goto out;
|
|
+
|
|
+ /* Discard the event if it still is within the previous rect -
|
|
+ * unless the pressure is clearly harder, but then use previous
|
|
+ * x,y position. If any coordinate deviates enough, fudging
|
|
+ * of all three will still take place in the input layer.
|
|
+ */
|
|
+ inside_rect = (ts->sample_sent &&
|
|
+ x > (int)ts->out_x - ts->fudge_x &&
|
|
+ x < (int)ts->out_x + ts->fudge_x &&
|
|
+ y > (int)ts->out_y - ts->fudge_y &&
|
|
+ y < (int)ts->out_y + ts->fudge_y);
|
|
+ if (inside_rect)
|
|
+ x = ts->out_x, y = ts->out_y;
|
|
+
|
|
+ if (!inside_rect || pressure < (ts->out_p - ts->fudge_p)) {
|
|
+ tsc2005_ts_update_pen_state(ts, x, y, pressure);
|
|
+ ts->sample_sent = 1;
|
|
+ ts->out_x = x;
|
|
+ ts->out_y = y;
|
|
+ ts->out_p = pressure;
|
|
+ }
|
|
+out:
|
|
+ if (ts->spi_pending > 1) {
|
|
+ /* One or more interrupts (sometimes several dozens)
|
|
+ * occured while waiting for the SPI read - get
|
|
+ * another read going.
|
|
+ */
|
|
+ ts->spi_pending = 1;
|
|
+ if (spi_async(ts->spi, &ts->read_msg)) {
|
|
+ dev_err(&ts->spi->dev, "ts: spi_async() failed");
|
|
+ ts->spi_pending = 0;
|
|
+ }
|
|
+ } else
|
|
+ ts->spi_pending = 0;
|
|
+
|
|
+ /* kick pen up timer - to make sure it expires again(!) */
|
|
+ if (ts->sample_sent) {
|
|
+ mod_timer(&ts->penup_timer,
|
|
+ jiffies + msecs_to_jiffies(TSC2005_TS_PENUP_TIME));
|
|
+ /* Also kick the watchdog, as we still think we're alive */
|
|
+ if (ts->esd_timeout && ts->disable_depth == 0) {
|
|
+ unsigned long wdj = msecs_to_jiffies(ts->esd_timeout);
|
|
+ mod_timer(&ts->esd_timer, round_jiffies(jiffies+wdj));
|
|
+ }
|
|
+ }
|
|
+ spin_unlock_irqrestore(&ts->lock, flags);
|
|
+}
|
|
+
|
|
+/* This penup timer is very forgiving of delayed SPI reads. The
|
|
+ * (ESD) watchdog will rescue us if spi_pending remains set, unless
|
|
+ * we are enterring the disabled state. In that case we must just
|
|
+ * handle the pen up, and let disabling complete.
|
|
+ */
|
|
+static void tsc2005_ts_penup_timer_handler(unsigned long data)
|
|
+{
|
|
+ struct tsc2005 *ts = (struct tsc2005 *)data;
|
|
+ if ((!ts->spi_pending || ts->disable_depth) &&
|
|
+ ts->sample_sent) {
|
|
+ tsc2005_ts_update_pen_state(ts, 0, 0, 0);
|
|
+ ts->sample_sent = 0;
|
|
+ }
|
|
+}
|
|
+
|
|
+/*
|
|
+ * This interrupt is called when pen is down and coordinates are
|
|
+ * available. That is indicated by a either:
|
|
+ * a) a rising edge on PINTDAV or (PENDAV mode)
|
|
+ * b) a falling edge on DAV line (DAV mode)
|
|
+ * depending on the setting of the IRQ bits in the CFR2 setting above.
|
|
+ */
|
|
+static irqreturn_t tsc2005_ts_irq_handler(int irq, void *dev_id)
|
|
+{
|
|
+ struct tsc2005 *ts = dev_id;
|
|
+ if (ts->disable_depth)
|
|
+ goto out;
|
|
+
|
|
+ if (!ts->spi_pending) {
|
|
+ if (spi_async(ts->spi, &ts->read_msg)) {
|
|
+ dev_err(&ts->spi->dev, "ts: spi_async() failed");
|
|
+ goto out;
|
|
+ }
|
|
+ }
|
|
+ /* By shifting in 1s we can never wrap */
|
|
+ ts->spi_pending = (ts->spi_pending<<1)+1;
|
|
+
|
|
+ /* Kick pen up timer only if it's not been started yet. Strictly,
|
|
+ * it isn't even necessary to start it at all here, but doing so
|
|
+ * keeps an equivalence between pen state and timer state.
|
|
+ * The SPI read loop will keep pushing it into the future.
|
|
+ * If it times out with an SPI pending, it's ignored anyway.
|
|
+ */
|
|
+ if (!timer_pending(&ts->penup_timer)) {
|
|
+ unsigned long pu = msecs_to_jiffies(TSC2005_TS_PENUP_TIME);
|
|
+ ts->penup_timer.expires = jiffies + pu;
|
|
+ add_timer(&ts->penup_timer);
|
|
+ }
|
|
+out:
|
|
+ return IRQ_HANDLED;
|
|
+}
|
|
+
|
|
+static void tsc2005_ts_setup_spi_xfer(struct tsc2005 *ts)
|
|
+{
|
|
+ struct spi_message *m = &ts->read_msg;
|
|
+ struct spi_transfer *x = &ts->read_xfer[0];
|
|
+ int i;
|
|
+
|
|
+ spi_message_init(m);
|
|
+
|
|
+ for (i = 0; i < NUM_READ_REGS; i++, x++) {
|
|
+ x->tx_buf = &tsc2005_read_reg[i];
|
|
+ x->rx_buf = &ts->data[i];
|
|
+ x->len = 4;
|
|
+ x->bits_per_word = 24;
|
|
+ x->cs_change = i < (NUM_READ_REGS - 1);
|
|
+ spi_message_add_tail(x, m);
|
|
+ }
|
|
+
|
|
+ m->complete = tsc2005_ts_rx;
|
|
+ m->context = ts;
|
|
+}
|
|
+
|
|
+static ssize_t tsc2005_ts_pen_down_show(struct device *dev,
|
|
+ struct device_attribute *attr,
|
|
+ char *buf)
|
|
+{
|
|
+ struct tsc2005 *ts = dev_get_drvdata(dev);
|
|
+
|
|
+ return sprintf(buf, "%u\n", ts->pen_down);
|
|
+}
|
|
+
|
|
+static DEVICE_ATTR(pen_down, S_IRUGO, tsc2005_ts_pen_down_show, NULL);
|
|
+
|
|
+static int tsc2005_configure(struct tsc2005 *ts, int flags)
|
|
+{
|
|
+ tsc2005_write(ts, TSC2005_REG_CFR0, TSC2005_CFR0_INITVALUE);
|
|
+ tsc2005_write(ts, TSC2005_REG_CFR1, TSC2005_CFR1_INITVALUE);
|
|
+ tsc2005_write(ts, TSC2005_REG_CFR2, TSC2005_CFR2_INITVALUE);
|
|
+ tsc2005_cmd(ts, flags);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static void tsc2005_start_scan(struct tsc2005 *ts)
|
|
+{
|
|
+ tsc2005_configure(ts, TSC2005_CMD_SCAN_XYZZ);
|
|
+}
|
|
+
|
|
+static void tsc2005_stop_scan(struct tsc2005 *ts)
|
|
+{
|
|
+ tsc2005_cmd(ts, TSC2005_CMD_STOP);
|
|
+}
|
|
+
|
|
+/* Must be called with mutex held */
|
|
+static void tsc2005_disable(struct tsc2005 *ts)
|
|
+{
|
|
+ if (ts->disable_depth++ != 0)
|
|
+ return;
|
|
+
|
|
+ disable_irq(ts->spi->irq);
|
|
+ if (ts->esd_timeout)
|
|
+ del_timer(&ts->esd_timer);
|
|
+
|
|
+ /* wait until penup timer expire normally */
|
|
+ do {
|
|
+ msleep(4);
|
|
+ } while (ts->sample_sent);
|
|
+
|
|
+ tsc2005_stop_scan(ts);
|
|
+}
|
|
+
|
|
+static void tsc2005_enable(struct tsc2005 *ts)
|
|
+{
|
|
+ if (ts->disable_depth != 1)
|
|
+ goto out;
|
|
+
|
|
+ if (ts->esd_timeout) {
|
|
+ unsigned long wdj = msecs_to_jiffies(ts->esd_timeout);
|
|
+ ts->esd_timer.expires = round_jiffies(jiffies+wdj);
|
|
+ add_timer(&ts->esd_timer);
|
|
+ }
|
|
+ tsc2005_start_scan(ts);
|
|
+ enable_irq(ts->spi->irq);
|
|
+out:
|
|
+ --ts->disable_depth;
|
|
+}
|
|
+
|
|
+static ssize_t tsc2005_disable_show(struct device *dev,
|
|
+ struct device_attribute *attr, char *buf)
|
|
+{
|
|
+ struct tsc2005 *ts = dev_get_drvdata(dev);
|
|
+
|
|
+ return sprintf(buf, "%u\n", ts->disabled);
|
|
+}
|
|
+
|
|
+static ssize_t tsc2005_disable_store(struct device *dev,
|
|
+ struct device_attribute *attr,
|
|
+ const char *buf, size_t count)
|
|
+{
|
|
+ struct tsc2005 *ts = dev_get_drvdata(dev);
|
|
+ unsigned long res;
|
|
+ int i;
|
|
+
|
|
+ if (strict_strtoul(buf, 10, &res) < 0)
|
|
+ return -EINVAL;
|
|
+ i = res ? 1 : 0;
|
|
+
|
|
+ mutex_lock(&ts->mutex);
|
|
+ if (i == ts->disabled)
|
|
+ goto out;
|
|
+ ts->disabled = i;
|
|
+
|
|
+ if (i)
|
|
+ tsc2005_disable(ts);
|
|
+ else
|
|
+ tsc2005_enable(ts);
|
|
+out:
|
|
+ mutex_unlock(&ts->mutex);
|
|
+ return count;
|
|
+}
|
|
+
|
|
+static DEVICE_ATTR(disable_ts, 0664, tsc2005_disable_show,
|
|
+ tsc2005_disable_store);
|
|
+
|
|
+static ssize_t tsc2005_ctrl_selftest_show(struct device *dev,
|
|
+ struct device_attribute *attr,
|
|
+ char *buf)
|
|
+{
|
|
+ u16 temp_high_orig, temp_high_test, temp_high;
|
|
+ unsigned int result = 1;
|
|
+ struct tsc2005 *ts = dev_get_drvdata(dev);
|
|
+
|
|
+ if (!ts->set_reset) {
|
|
+ dev_warn(&ts->spi->dev,
|
|
+ "unable to selftest: reset not configured\n");
|
|
+ result = 0;
|
|
+ goto out;
|
|
+ }
|
|
+
|
|
+ mutex_lock(&ts->mutex);
|
|
+ tsc2005_disable(ts);
|
|
+
|
|
+ /* Test ctrl communications via temp high / low registers */
|
|
+ tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high_orig);
|
|
+
|
|
+ temp_high_test = (temp_high_orig - 1) & 0x0FFF;
|
|
+
|
|
+ tsc2005_write(ts, TSC2005_REG_TEMP_HIGH, temp_high_test);
|
|
+
|
|
+ tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high);
|
|
+
|
|
+ if (temp_high != temp_high_test) {
|
|
+ result = 0;
|
|
+ dev_warn(dev, "selftest failed: %d != %d\n",
|
|
+ temp_high, temp_high_test);
|
|
+ }
|
|
+
|
|
+ /* HW Reset */
|
|
+ ts->set_reset(0);
|
|
+ msleep(1); /* only 10us required */
|
|
+ ts->set_reset(1);
|
|
+
|
|
+ tsc2005_enable(ts);
|
|
+
|
|
+ /* Test that reset really happened */
|
|
+ tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high);
|
|
+
|
|
+ if (temp_high != temp_high_orig) {
|
|
+ result = 0;
|
|
+ dev_warn(dev, "selftest failed after reset: "
|
|
+ "%d != %d\n",
|
|
+ temp_high, temp_high_orig);
|
|
+ }
|
|
+
|
|
+ mutex_unlock(&ts->mutex);
|
|
+
|
|
+out:
|
|
+ return sprintf(buf, "%u\n", result);
|
|
+}
|
|
+
|
|
+static DEVICE_ATTR(ts_ctrl_selftest, S_IRUGO, tsc2005_ctrl_selftest_show, NULL);
|
|
+
|
|
+static void tsc2005_esd_timer_handler(unsigned long data)
|
|
+{
|
|
+ struct tsc2005 *ts = (struct tsc2005 *)data;
|
|
+ if (!ts->disable_depth)
|
|
+ schedule_work(&ts->esd_work);
|
|
+}
|
|
+
|
|
+static void tsc2005_rst_handler(struct work_struct *work)
|
|
+{
|
|
+ u16 reg_val;
|
|
+ struct tsc2005 *ts = container_of(work, struct tsc2005, esd_work);
|
|
+ unsigned long wdj;
|
|
+
|
|
+ mutex_lock(&ts->mutex);
|
|
+
|
|
+ /* If we are disabled, or the a touch has been detected,
|
|
+ * then ignore this timeout. The enable will restart the
|
|
+ * watchdog, as it restarts scanning
|
|
+ */
|
|
+ if (ts->disable_depth)
|
|
+ goto out;
|
|
+
|
|
+ /* If we cannot read our known value from configuration register 0
|
|
+ * then reset the controller as if from power-up and start
|
|
+ * scanning again. Always re-arm the watchdog.
|
|
+ */
|
|
+ tsc2005_read(ts, TSC2005_REG_CFR0, ®_val);
|
|
+ if ((reg_val ^ TSC2005_CFR0_INITVALUE) & TSC2005_CFR0_RW_MASK) {
|
|
+ dev_info(&ts->spi->dev, "TSC not responding, resetting.\n");
|
|
+ /* If this timer kicked in, the penup timer, if ever active
|
|
+ * at all, must have expired ages ago, so no need to del it.
|
|
+ */
|
|
+ ts->set_reset(0);
|
|
+ if (ts->sample_sent) {
|
|
+ tsc2005_ts_update_pen_state(ts, 0, 0, 0);
|
|
+ ts->sample_sent = 0;
|
|
+ }
|
|
+ ts->spi_pending = 0;
|
|
+ msleep(1); /* only 10us required */
|
|
+ ts->set_reset(1);
|
|
+ tsc2005_start_scan(ts);
|
|
+ }
|
|
+ wdj = msecs_to_jiffies(ts->esd_timeout);
|
|
+ mod_timer(&ts->esd_timer, round_jiffies(jiffies+wdj));
|
|
+
|
|
+out:
|
|
+ mutex_unlock(&ts->mutex);
|
|
+}
|
|
+
|
|
+static int __devinit tsc2005_ts_init(struct tsc2005 *ts,
|
|
+ struct tsc2005_platform_data *pdata)
|
|
+{
|
|
+ struct input_dev *idev;
|
|
+ int r;
|
|
+ int x_max, y_max;
|
|
+
|
|
+ init_timer(&ts->penup_timer);
|
|
+ setup_timer(&ts->penup_timer, tsc2005_ts_penup_timer_handler,
|
|
+ (unsigned long)ts);
|
|
+
|
|
+ spin_lock_init(&ts->lock);
|
|
+ mutex_init(&ts->mutex);
|
|
+
|
|
+ ts->x_plate_ohm = pdata->ts_x_plate_ohm ? : 280;
|
|
+ ts->hw_avg_max = pdata->ts_hw_avg;
|
|
+ ts->stab_time = pdata->ts_stab_time;
|
|
+ x_max = pdata->ts_x_max ? : 4096;
|
|
+ ts->fudge_x = pdata->ts_x_fudge ? : 4;
|
|
+ y_max = pdata->ts_y_max ? : 4096;
|
|
+ ts->fudge_y = pdata->ts_y_fudge ? : 8;
|
|
+ ts->p_max = pdata->ts_pressure_max ? : MAX_12BIT;
|
|
+ ts->touch_pressure = pdata->ts_touch_pressure ? : ts->p_max;
|
|
+ ts->fudge_p = pdata->ts_pressure_fudge ? : 2;
|
|
+
|
|
+ ts->set_reset = pdata->set_reset;
|
|
+
|
|
+ idev = input_allocate_device();
|
|
+ if (idev == NULL) {
|
|
+ r = -ENOMEM;
|
|
+ goto err1;
|
|
+ }
|
|
+
|
|
+ idev->name = "TSC2005 touchscreen";
|
|
+ snprintf(ts->phys, sizeof(ts->phys), "%s/input-ts",
|
|
+ dev_name(&ts->spi->dev));
|
|
+ idev->phys = ts->phys;
|
|
+
|
|
+ idev->evbit[0] = BIT(EV_ABS) | BIT(EV_KEY);
|
|
+ idev->absbit[0] = BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE);
|
|
+ idev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
|
|
+ ts->idev = idev;
|
|
+
|
|
+ tsc2005_ts_setup_spi_xfer(ts);
|
|
+
|
|
+ input_set_abs_params(idev, ABS_X, 0, x_max, ts->fudge_x, 0);
|
|
+ input_set_abs_params(idev, ABS_Y, 0, y_max, ts->fudge_y, 0);
|
|
+ input_set_abs_params(idev, ABS_PRESSURE, 0, ts->p_max, ts->fudge_p, 0);
|
|
+
|
|
+ tsc2005_start_scan(ts);
|
|
+
|
|
+ r = request_irq(ts->spi->irq, tsc2005_ts_irq_handler,
|
|
+ (((TSC2005_CFR2_INITVALUE & TSC2005_CFR2_IRQ_MASK) ==
|
|
+ TSC2005_CFR2_IRQ_PENDAV)
|
|
+ ? IRQF_TRIGGER_RISING
|
|
+ : IRQF_TRIGGER_FALLING) |
|
|
+ IRQF_DISABLED, "tsc2005", ts);
|
|
+ if (r < 0) {
|
|
+ dev_err(&ts->spi->dev, "unable to get DAV IRQ");
|
|
+ goto err2;
|
|
+ }
|
|
+
|
|
+ set_irq_wake(ts->spi->irq, 1);
|
|
+
|
|
+ r = input_register_device(idev);
|
|
+ if (r < 0) {
|
|
+ dev_err(&ts->spi->dev, "can't register touchscreen device\n");
|
|
+ goto err3;
|
|
+ }
|
|
+
|
|
+ /* We can tolerate these failing */
|
|
+ r = device_create_file(&ts->spi->dev, &dev_attr_ts_ctrl_selftest);
|
|
+ if (r < 0)
|
|
+ dev_warn(&ts->spi->dev, "can't create sysfs file for %s: %d\n",
|
|
+ dev_attr_ts_ctrl_selftest.attr.name, r);
|
|
+
|
|
+ r = device_create_file(&ts->spi->dev, &dev_attr_pen_down);
|
|
+ if (r < 0)
|
|
+ dev_warn(&ts->spi->dev, "can't create sysfs file for %s: %d\n",
|
|
+ dev_attr_pen_down.attr.name, r);
|
|
+
|
|
+ r = device_create_file(&ts->spi->dev, &dev_attr_disable_ts);
|
|
+ if (r < 0)
|
|
+ dev_warn(&ts->spi->dev, "can't create sysfs file for %s: %d\n",
|
|
+ dev_attr_disable_ts.attr.name, r);
|
|
+
|
|
+ /* Finally, configure and start the optional EDD watchdog. */
|
|
+ ts->esd_timeout = pdata->esd_timeout;
|
|
+ if (ts->esd_timeout && ts->set_reset) {
|
|
+ unsigned long wdj;
|
|
+ setup_timer(&ts->esd_timer, tsc2005_esd_timer_handler,
|
|
+ (unsigned long)ts);
|
|
+ INIT_WORK(&ts->esd_work, tsc2005_rst_handler);
|
|
+ wdj = msecs_to_jiffies(ts->esd_timeout);
|
|
+ ts->esd_timer.expires = round_jiffies(jiffies+wdj);
|
|
+ add_timer(&ts->esd_timer);
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+err3:
|
|
+ free_irq(ts->spi->irq, ts);
|
|
+err2:
|
|
+ tsc2005_stop_scan(ts);
|
|
+ input_free_device(idev);
|
|
+err1:
|
|
+ return r;
|
|
+}
|
|
+
|
|
+static int __devinit tsc2005_probe(struct spi_device *spi)
|
|
+{
|
|
+ struct tsc2005 *ts;
|
|
+ struct tsc2005_platform_data *pdata = spi->dev.platform_data;
|
|
+ int r;
|
|
+
|
|
+ if (spi->irq < 0) {
|
|
+ dev_dbg(&spi->dev, "no irq?\n");
|
|
+ return -ENODEV;
|
|
+ }
|
|
+ if (!pdata) {
|
|
+ dev_dbg(&spi->dev, "no platform data?\n");
|
|
+ return -ENODEV;
|
|
+ }
|
|
+
|
|
+ ts = kzalloc(sizeof(*ts), GFP_KERNEL);
|
|
+ if (ts == NULL)
|
|
+ return -ENOMEM;
|
|
+
|
|
+ dev_set_drvdata(&spi->dev, ts);
|
|
+ ts->spi = spi;
|
|
+ spi->dev.power.power_state = PMSG_ON;
|
|
+
|
|
+ spi->mode = SPI_MODE_0;
|
|
+ spi->bits_per_word = 8;
|
|
+ /* The max speed might've been defined by the board-specific
|
|
+ * struct */
|
|
+ if (!spi->max_speed_hz)
|
|
+ spi->max_speed_hz = TSC2005_HZ;
|
|
+
|
|
+ spi_setup(spi);
|
|
+
|
|
+ r = tsc2005_ts_init(ts, pdata);
|
|
+ if (r)
|
|
+ goto err1;
|
|
+
|
|
+ return 0;
|
|
+
|
|
+err1:
|
|
+ kfree(ts);
|
|
+ return r;
|
|
+}
|
|
+
|
|
+static int __devexit tsc2005_remove(struct spi_device *spi)
|
|
+{
|
|
+ struct tsc2005 *ts = dev_get_drvdata(&spi->dev);
|
|
+
|
|
+ mutex_lock(&ts->mutex);
|
|
+ tsc2005_disable(ts);
|
|
+ mutex_unlock(&ts->mutex);
|
|
+
|
|
+ device_remove_file(&ts->spi->dev, &dev_attr_disable_ts);
|
|
+ device_remove_file(&ts->spi->dev, &dev_attr_pen_down);
|
|
+ device_remove_file(&ts->spi->dev, &dev_attr_ts_ctrl_selftest);
|
|
+
|
|
+ free_irq(ts->spi->irq, ts);
|
|
+ input_unregister_device(ts->idev);
|
|
+
|
|
+ if (ts->esd_timeout)
|
|
+ del_timer(&ts->esd_timer);
|
|
+ kfree(ts);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+#ifdef CONFIG_PM
|
|
+static int tsc2005_suspend(struct spi_device *spi, pm_message_t mesg)
|
|
+{
|
|
+ struct tsc2005 *ts = dev_get_drvdata(&spi->dev);
|
|
+
|
|
+ mutex_lock(&ts->mutex);
|
|
+ tsc2005_disable(ts);
|
|
+ mutex_unlock(&ts->mutex);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int tsc2005_resume(struct spi_device *spi)
|
|
+{
|
|
+ struct tsc2005 *ts = dev_get_drvdata(&spi->dev);
|
|
+
|
|
+ mutex_lock(&ts->mutex);
|
|
+ tsc2005_enable(ts);
|
|
+ mutex_unlock(&ts->mutex);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+#endif
|
|
+
|
|
+static struct spi_driver tsc2005_driver = {
|
|
+ .driver = {
|
|
+ .name = "tsc2005",
|
|
+ .owner = THIS_MODULE,
|
|
+ },
|
|
+#ifdef CONFIG_PM
|
|
+ .suspend = tsc2005_suspend,
|
|
+ .resume = tsc2005_resume,
|
|
+#endif
|
|
+ .probe = tsc2005_probe,
|
|
+ .remove = __devexit_p(tsc2005_remove),
|
|
+};
|
|
+
|
|
+static int __init tsc2005_init(void)
|
|
+{
|
|
+ printk(KERN_INFO "TSC2005 driver initializing\n");
|
|
+
|
|
+ return spi_register_driver(&tsc2005_driver);
|
|
+}
|
|
+module_init(tsc2005_init);
|
|
+
|
|
+static void __exit tsc2005_exit(void)
|
|
+{
|
|
+ spi_unregister_driver(&tsc2005_driver);
|
|
+}
|
|
+module_exit(tsc2005_exit);
|
|
+
|
|
+MODULE_AUTHOR("Lauri Leukkunen <lauri.leukkunen@nokia.com>");
|
|
+MODULE_LICENSE("GPL");
|
|
+MODULE_ALIAS("platform:tsc2005");
|
|
Index: linux-2.6.38-rc6/include/linux/spi/tsc2005.h
|
|
===================================================================
|
|
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
|
|
+++ linux-2.6.38-rc6/include/linux/spi/tsc2005.h 2011-02-24 00:23:46.459893217 +0100
|
|
@@ -0,0 +1,30 @@
|
|
+#ifndef _LINUX_SPI_TSC2005_H
|
|
+#define _LINUX_SPI_TSC2005_H
|
|
+
|
|
+#include <linux/types.h>
|
|
+
|
|
+struct tsc2005_platform_data {
|
|
+ u16 ts_x_plate_ohm;
|
|
+ u32 ts_stab_time; /* voltage settling time */
|
|
+ u8 ts_hw_avg; /* HW assiseted averaging. Can be
|
|
+ 0, 4, 8, 16 samples per reading */
|
|
+ u32 ts_touch_pressure; /* Pressure limit until we report a
|
|
+ touch event. After that we switch
|
|
+ to ts_max_pressure. */
|
|
+ u32 ts_pressure_max;/* Samples with bigger pressure value will
|
|
+ be ignored, since the corresponding X, Y
|
|
+ values are unreliable */
|
|
+ u32 ts_pressure_fudge;
|
|
+ u32 ts_x_max;
|
|
+ u32 ts_x_fudge;
|
|
+ u32 ts_y_max;
|
|
+ u32 ts_y_fudge;
|
|
+
|
|
+ u32 esd_timeout; /* msec of inactivity before we check */
|
|
+
|
|
+ unsigned ts_ignore_last:1;
|
|
+
|
|
+ void (*set_reset)(bool enable);
|
|
+};
|
|
+
|
|
+#endif
|