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-rw-r--r--target/linux/omap24xx/patches-2.6.36/600-tsc2005.patch1031
1 files changed, 1031 insertions, 0 deletions
diff --git a/target/linux/omap24xx/patches-2.6.36/600-tsc2005.patch b/target/linux/omap24xx/patches-2.6.36/600-tsc2005.patch
new file mode 100644
index 0000000000..6146eb975c
--- /dev/null
+++ b/target/linux/omap24xx/patches-2.6.36/600-tsc2005.patch
@@ -0,0 +1,1031 @@
+---
+ drivers/input/touchscreen/Kconfig | 11
+ drivers/input/touchscreen/Makefile | 1
+ drivers/input/touchscreen/tsc2005.c | 958 ++++++++++++++++++++++++++++++++++++
+ include/linux/spi/tsc2005.h | 30 +
+ 4 files changed, 1000 insertions(+)
+
+--- linux-2.6.36-rc4.orig/drivers/input/touchscreen/Kconfig
++++ linux-2.6.36-rc4/drivers/input/touchscreen/Kconfig
+@@ -586,6 +586,17 @@ config TOUCHSCREEN_TOUCHIT213
+ To compile this driver as a module, choose M here: the
+ module will be called touchit213.
+
++config TOUCHSCREEN_TSC2005
++ tristate "TSC2005 based touchscreens"
++ depends on SPI_MASTER
++ help
++ Say Y here if you have a TSC2005 based touchscreen.
++
++ If unsure, say N.
++
++ To compile this driver as a module, choose M here: the
++ module will be called tsc2005.
++
+ config TOUCHSCREEN_TSC2007
+ tristate "TSC2007 based touchscreens"
+ depends on I2C
+--- linux-2.6.36-rc4.orig/drivers/input/touchscreen/Makefile
++++ linux-2.6.36-rc4/drivers/input/touchscreen/Makefile
+@@ -40,6 +40,7 @@ obj-$(CONFIG_TOUCHSCREEN_STMPE) += stmp
+ obj-$(CONFIG_TOUCHSCREEN_TOUCHIT213) += touchit213.o
+ obj-$(CONFIG_TOUCHSCREEN_TOUCHRIGHT) += touchright.o
+ obj-$(CONFIG_TOUCHSCREEN_TOUCHWIN) += touchwin.o
++obj-$(CONFIG_TOUCHSCREEN_TSC2005) += tsc2005.o
+ obj-$(CONFIG_TOUCHSCREEN_TSC2007) += tsc2007.o
+ obj-$(CONFIG_TOUCHSCREEN_UCB1400) += ucb1400_ts.o
+ obj-$(CONFIG_TOUCHSCREEN_WACOM_W8001) += wacom_w8001.o
+--- /dev/null
++++ linux-2.6.36-rc4/drivers/input/touchscreen/tsc2005.c
+@@ -0,0 +1,958 @@
++/*
++ * TSC2005 touchscreen driver
++ *
++ * Copyright (C) 2006-2008 Nokia Corporation
++ *
++ * Author: Lauri Leukkunen <lauri.leukkunen@nokia.com>
++ * based on TSC2301 driver by Klaus K. Pedersen <klaus.k.pedersen@nokia.com>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ *
++ */
++
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/input.h>
++#include <linux/interrupt.h>
++#include <linux/delay.h>
++#include <linux/spi/spi.h>
++
++#include <linux/spi/tsc2005.h>
++
++/**
++ * The touchscreen interface operates as follows:
++ *
++ * Initialize:
++ * Request access to GPIO103 (DAV)
++ * tsc2005_ts_irq_handler will trigger when DAV line goes down
++ *
++ * 1) Pen is pressed against touchscreeen
++ * 2) TSC2005 performs AD conversion
++ * 3) After the conversion is done TSC2005 drives DAV line down
++ * 4) GPIO IRQ is received and tsc2005_ts_irq_handler is called
++ * 5) tsc2005_ts_irq_handler queues up an spi transfer to fetch
++ * the x, y, z1, z2 values
++ * 6) tsc2005_ts_rx() reports coordinates to input layer and
++ * sets up tsc2005_ts_timer() to be called after TSC2005_TS_SCAN_TIME
++ * 7) When the penup_timer expires, there have not been DAV interrupts
++ * during the last 20ms which means the pen has been lifted.
++ */
++
++#define TSC2005_VDD_LOWER_27
++
++#ifdef TSC2005_VDD_LOWER_27
++#define TSC2005_HZ (10000000)
++#else
++#define TSC2005_HZ (25000000)
++#endif
++
++#define TSC2005_CMD (0x80)
++#define TSC2005_REG (0x00)
++
++#define TSC2005_CMD_STOP (1)
++#define TSC2005_CMD_10BIT (0 << 2)
++#define TSC2005_CMD_12BIT (1 << 2)
++
++#define TSC2005_CMD_SCAN_XYZZ (0 << 3)
++#define TSC2005_CMD_SCAN_XY (1 << 3)
++#define TSC2005_CMD_SCAN_X (2 << 3)
++#define TSC2005_CMD_SCAN_Y (3 << 3)
++#define TSC2005_CMD_SCAN_ZZ (4 << 3)
++#define TSC2005_CMD_AUX_SINGLE (5 << 3)
++#define TSC2005_CMD_TEMP1 (6 << 3)
++#define TSC2005_CMD_TEMP2 (7 << 3)
++#define TSC2005_CMD_AUX_CONT (8 << 3)
++#define TSC2005_CMD_TEST_X_CONN (9 << 3)
++#define TSC2005_CMD_TEST_Y_CONN (10 << 3)
++#define TSC2005_CMD_TEST_SHORT (11 << 3)
++/* command 12 reserved, according to 2008-03 erratum */
++#define TSC2005_CMD_DRIVE_XX (13 << 3)
++#define TSC2005_CMD_DRIVE_YY (14 << 3)
++#define TSC2005_CMD_DRIVE_YX (15 << 3)
++
++#define TSC2005_REG_X (0 << 3)
++#define TSC2005_REG_Y (1 << 3)
++#define TSC2005_REG_Z1 (2 << 3)
++#define TSC2005_REG_Z2 (3 << 3)
++#define TSC2005_REG_AUX (4 << 3)
++#define TSC2005_REG_TEMP1 (5 << 3)
++#define TSC2005_REG_TEMP2 (6 << 3)
++#define TSC2005_REG_STATUS (7 << 3)
++#define TSC2005_REG_AUX_HIGH (8 << 3)
++#define TSC2005_REG_AUX_LOW (9 << 3)
++#define TSC2005_REG_TEMP_HIGH (10 << 3)
++#define TSC2005_REG_TEMP_LOW (11 << 3)
++#define TSC2005_REG_CFR0 (12 << 3)
++#define TSC2005_REG_CFR1 (13 << 3)
++#define TSC2005_REG_CFR2 (14 << 3)
++#define TSC2005_REG_FUNCTION (15 << 3)
++
++#define TSC2005_REG_PND0 (1 << 1)
++#define TSC2005_REG_READ (0x01)
++#define TSC2005_REG_WRITE (0x00)
++
++
++#define TSC2005_CFR0_LONGSAMPLING (1)
++#define TSC2005_CFR0_DETECTINWAIT (1 << 1)
++#define TSC2005_CFR0_SENSETIME_32US (0)
++#define TSC2005_CFR0_SENSETIME_96US (1 << 2)
++#define TSC2005_CFR0_SENSETIME_544US (1 << 3)
++#define TSC2005_CFR0_SENSETIME_2080US (1 << 4)
++#define TSC2005_CFR0_SENSETIME_2656US (0x001C)
++#define TSC2005_CFR0_PRECHARGE_20US (0x0000)
++#define TSC2005_CFR0_PRECHARGE_84US (0x0020)
++#define TSC2005_CFR0_PRECHARGE_276US (0x0040)
++#define TSC2005_CFR0_PRECHARGE_1044US (0x0080)
++#define TSC2005_CFR0_PRECHARGE_1364US (0x00E0)
++#define TSC2005_CFR0_STABTIME_0US (0x0000)
++#define TSC2005_CFR0_STABTIME_100US (0x0100)
++#define TSC2005_CFR0_STABTIME_500US (0x0200)
++#define TSC2005_CFR0_STABTIME_1MS (0x0300)
++#define TSC2005_CFR0_STABTIME_5MS (0x0400)
++#define TSC2005_CFR0_STABTIME_100MS (0x0700)
++#define TSC2005_CFR0_CLOCK_4MHZ (0x0000)
++#define TSC2005_CFR0_CLOCK_2MHZ (0x0800)
++#define TSC2005_CFR0_CLOCK_1MHZ (0x1000)
++#define TSC2005_CFR0_RESOLUTION12 (0x2000)
++#define TSC2005_CFR0_STATUS (0x4000)
++#define TSC2005_CFR0_PENMODE (0x8000)
++
++#define TSC2005_CFR0_INITVALUE (TSC2005_CFR0_STABTIME_1MS | \
++ TSC2005_CFR0_CLOCK_1MHZ | \
++ TSC2005_CFR0_RESOLUTION12 | \
++ TSC2005_CFR0_PRECHARGE_276US | \
++ TSC2005_CFR0_PENMODE)
++
++/* Bits common to both read and write of config register 0 */
++#define TSC2005_CFR0_RW_MASK 0x3fff
++
++#define TSC2005_CFR1_BATCHDELAY_0MS (0x0000)
++#define TSC2005_CFR1_BATCHDELAY_1MS (0x0001)
++#define TSC2005_CFR1_BATCHDELAY_2MS (0x0002)
++#define TSC2005_CFR1_BATCHDELAY_4MS (0x0003)
++#define TSC2005_CFR1_BATCHDELAY_10MS (0x0004)
++#define TSC2005_CFR1_BATCHDELAY_20MS (0x0005)
++#define TSC2005_CFR1_BATCHDELAY_40MS (0x0006)
++#define TSC2005_CFR1_BATCHDELAY_100MS (0x0007)
++
++#define TSC2005_CFR1_INITVALUE (TSC2005_CFR1_BATCHDELAY_4MS)
++
++#define TSC2005_CFR2_MAVE_TEMP (0x0001)
++#define TSC2005_CFR2_MAVE_AUX (0x0002)
++#define TSC2005_CFR2_MAVE_Z (0x0004)
++#define TSC2005_CFR2_MAVE_Y (0x0008)
++#define TSC2005_CFR2_MAVE_X (0x0010)
++#define TSC2005_CFR2_AVG_1 (0x0000)
++#define TSC2005_CFR2_AVG_3 (0x0400)
++#define TSC2005_CFR2_AVG_7 (0x0800)
++#define TSC2005_CFR2_MEDIUM_1 (0x0000)
++#define TSC2005_CFR2_MEDIUM_3 (0x1000)
++#define TSC2005_CFR2_MEDIUM_7 (0x2000)
++#define TSC2005_CFR2_MEDIUM_15 (0x3000)
++
++#define TSC2005_CFR2_IRQ_MASK (0xC000)
++#define TSC2005_CFR2_IRQ_DAV (0x4000)
++#define TSC2005_CFR2_IRQ_PEN (0x8000)
++#define TSC2005_CFR2_IRQ_PENDAV (0x0000)
++
++#define TSC2005_CFR2_INITVALUE (TSC2005_CFR2_IRQ_PENDAV | \
++ TSC2005_CFR2_MAVE_X | \
++ TSC2005_CFR2_MAVE_Y | \
++ TSC2005_CFR2_MAVE_Z | \
++ TSC2005_CFR2_MEDIUM_15 | \
++ TSC2005_CFR2_AVG_7)
++
++#define MAX_12BIT ((1 << 12) - 1)
++#define TS_SAMPLES 4
++#define TSC2005_TS_PENUP_TIME 40
++
++static const u32 tsc2005_read_reg[] = {
++ (TSC2005_REG | TSC2005_REG_X | TSC2005_REG_READ) << 16,
++ (TSC2005_REG | TSC2005_REG_Y | TSC2005_REG_READ) << 16,
++ (TSC2005_REG | TSC2005_REG_Z1 | TSC2005_REG_READ) << 16,
++ (TSC2005_REG | TSC2005_REG_Z2 | TSC2005_REG_READ) << 16,
++};
++#define NUM_READ_REGS (sizeof(tsc2005_read_reg)/sizeof(tsc2005_read_reg[0]))
++
++struct tsc2005 {
++ struct spi_device *spi;
++
++ struct input_dev *idev;
++ char phys[32];
++ struct timer_list penup_timer;
++
++ /* ESD recovery via a hardware reset if the tsc2005
++ * doesn't respond after a configurable period (in ms) of
++ * IRQ/SPI inactivity. If esd_timeout is 0, timer and work
++ * fields are used.
++ */
++ u32 esd_timeout;
++ struct timer_list esd_timer;
++ struct work_struct esd_work;
++
++ spinlock_t lock;
++ struct mutex mutex;
++
++ struct spi_message read_msg;
++ struct spi_transfer read_xfer[NUM_READ_REGS];
++ 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 = &rx;
++ 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, &reg_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");
+--- /dev/null
++++ linux-2.6.36-rc4/include/linux/spi/tsc2005.h
+@@ -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