From f5affd4f36d839d706b02f1ffb69e0cf70c4140c Mon Sep 17 00:00:00 2001
From: Lars-Peter Clausen <lars@metafoo.de>
Date: Mon, 18 May 2009 17:55:41 +0000
Subject: bump to 2.6.30-rc6
SVN-Revision: 15918
---
.../files-2.6.30/drivers/input/keyboard/gta02kbd.c | 442 ++++++++++
.../files-2.6.30/drivers/input/misc/lis302dl.c | 957 +++++++++++++++++++++
.../drivers/input/touchscreen/s3c2410_ts.c | 593 +++++++++++++
.../drivers/input/touchscreen/ts_filter_chain.c | 183 ++++
.../drivers/input/touchscreen/ts_filter_group.c | 296 +++++++
.../drivers/input/touchscreen/ts_filter_linear.c | 212 +++++
.../drivers/input/touchscreen/ts_filter_mean.c | 174 ++++
.../drivers/input/touchscreen/ts_filter_median.c | 261 ++++++
8 files changed, 3118 insertions(+)
create mode 100644 target/linux/s3c24xx/files-2.6.30/drivers/input/keyboard/gta02kbd.c
create mode 100644 target/linux/s3c24xx/files-2.6.30/drivers/input/misc/lis302dl.c
create mode 100644 target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/s3c2410_ts.c
create mode 100644 target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/ts_filter_chain.c
create mode 100644 target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/ts_filter_group.c
create mode 100644 target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/ts_filter_linear.c
create mode 100644 target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/ts_filter_mean.c
create mode 100644 target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/ts_filter_median.c
(limited to 'target/linux/s3c24xx/files-2.6.30/drivers/input')
diff --git a/target/linux/s3c24xx/files-2.6.30/drivers/input/keyboard/gta02kbd.c b/target/linux/s3c24xx/files-2.6.30/drivers/input/keyboard/gta02kbd.c
new file mode 100644
index 0000000..0814d10
--- /dev/null
+++ b/target/linux/s3c24xx/files-2.6.30/drivers/input/keyboard/gta02kbd.c
@@ -0,0 +1,442 @@
+/*
+ * Keyboard driver for Openmoko Freerunner GSM phone
+ *
+ * (C) 2006-2007 by Openmoko, Inc.
+ * Author: Harald Welte <laforge@openmoko.org>
+ * All rights reserved.
+ *
+ * inspired by corkgbd.c by Richard Purdie
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/jiffies.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+
+#include <mach/gpio.h>
+#include <asm/mach-types.h>
+
+#ifdef CONFIG_PM
+extern int global_inside_suspend;
+#else
+#define global_inside_suspend 0
+#endif
+
+struct gta02kbd {
+ struct platform_device *pdev;
+ struct input_dev *input;
+ struct device *cdev;
+ struct work_struct work;
+ int aux_state;
+ int work_in_progress;
+ int hp_irq_count_in_work;
+ int hp_irq_count;
+ int jack_irq;
+};
+
+static struct class *gta02kbd_switch_class;
+
+enum keys {
+ GTA02_KEY_AUX,
+ GTA02_KEY_HOLD,
+ GTA02_KEY_JACK,
+};
+
+struct gta02kbd_key {
+ const char * name;
+ irqreturn_t (*isr)(int irq, void *dev_id);
+ int irq;
+ int input_key;
+};
+
+static irqreturn_t gta02kbd_aux_irq(int irq, void *dev_id);
+static irqreturn_t gta02kbd_headphone_irq(int irq, void *dev_id);
+static irqreturn_t gta02kbd_default_key_irq(int irq, void *dev_id);
+
+
+static struct gta02kbd_key keys[] = {
+ [GTA02_KEY_AUX] = {
+ .name = "GTA02 AUX button",
+ .isr = gta02kbd_aux_irq,
+ .input_key = KEY_PHONE,
+ },
+ [GTA02_KEY_HOLD] = {
+ .name = "GTA02 HOLD button",
+ .isr = gta02kbd_default_key_irq,
+ .input_key = KEY_PAUSE,
+ },
+ [GTA02_KEY_JACK] = {
+ .name = "GTA02 Headphone jack",
+ .isr = gta02kbd_headphone_irq,
+ },
+};
+
+/* This timer section filters AUX button IRQ bouncing */
+
+static void aux_key_timer_f(unsigned long data);
+
+static struct timer_list aux_key_timer =
+ TIMER_INITIALIZER(aux_key_timer_f, 0, 0);
+
+#define AUX_TIMER_TIMEOUT (HZ >> 7)
+#define AUX_TIMER_ALLOWED_NOOP 2
+#define AUX_TIMER_CONSECUTIVE_EVENTS 5
+
+struct gta02kbd *timer_kbd;
+
+static void aux_key_timer_f(unsigned long data)
+{
+ static int noop_counter;
+ static int last_key = -1;
+ static int last_count;
+ int key_pressed;
+
+ key_pressed =
+ gpio_get_value(timer_kbd->pdev->resource[GTA02_KEY_AUX].start);
+
+ if (likely(key_pressed == last_key))
+ last_count++;
+ else {
+ last_count = 1;
+ last_key = key_pressed;
+ }
+
+ if (unlikely(last_count >= AUX_TIMER_CONSECUTIVE_EVENTS)) {
+ if (timer_kbd->aux_state != last_key) {
+ input_report_key(timer_kbd->input, KEY_PHONE, last_key);
+ input_sync(timer_kbd->input);
+
+ timer_kbd->aux_state = last_key;
+ noop_counter = 0;
+ }
+ last_count = 0;
+ if (unlikely(++noop_counter > AUX_TIMER_ALLOWED_NOOP)) {
+ noop_counter = 0;
+ return;
+ }
+ }
+
+ mod_timer(&aux_key_timer, jiffies + AUX_TIMER_TIMEOUT);
+}
+
+static irqreturn_t gta02kbd_aux_irq(int irq, void *dev)
+{
+ mod_timer(&aux_key_timer, jiffies + AUX_TIMER_TIMEOUT);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t gta02kbd_default_key_irq(int irq, void *dev_id)
+{
+ struct gta02kbd *kbd = dev_id;
+ int n;
+
+ for (n = 0; n < ARRAY_SIZE(keys); n++) {
+
+ if (irq != keys[n].irq)
+ continue;
+
+ input_report_key(kbd->input, keys[n].input_key,
+ gpio_get_value(kbd->pdev->resource[n].start));
+ input_sync(kbd->input);
+ }
+
+ return IRQ_HANDLED;
+}
+
+
+static const char *event_array_jack[2][4] = {
+ [0] = {
+ "SWITCH_NAME=headset",
+ "SWITCH_STATE=0",
+ "EVENT=remove",
+ NULL
+ },
+ [1] = {
+ "SWITCH_NAME=headset",
+ "SWITCH_STATE=1",
+ "EVENT=insert",
+ NULL
+ },
+};
+
+static void gta02kbd_jack_event(struct device *dev, int num)
+{
+ kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, (char **)event_array_jack[!!num]);
+}
+
+
+static void gta02kbd_debounce_jack(struct work_struct *work)
+{
+ struct gta02kbd *kbd = container_of(work, struct gta02kbd, work);
+ unsigned long flags;
+ int loop = 0;
+ int level;
+
+ do {
+ /*
+ * we wait out any multiple interrupt
+ * stuttering in 100ms lumps
+ */
+ do {
+ kbd->hp_irq_count_in_work = kbd->hp_irq_count;
+ msleep(100);
+ } while (kbd->hp_irq_count != kbd->hp_irq_count_in_work);
+ /*
+ * no new interrupts on jack for 100ms...
+ * ok we will report it
+ */
+ level = gpio_get_value(kbd->pdev->resource[GTA02_KEY_JACK].start);
+ input_report_switch(kbd->input, SW_HEADPHONE_INSERT, level);
+ input_sync(kbd->input);
+ gta02kbd_jack_event(kbd->cdev, level);
+ /*
+ * we go around the outer loop again if we detect that more
+ * interrupts came while we are servicing here. But we have
+ * to sequence it carefully with interrupts off
+ */
+ local_save_flags(flags);
+ /* no interrupts during this work means we can exit the work */
+ loop = !!(kbd->hp_irq_count != kbd->hp_irq_count_in_work);
+ if (!loop)
+ kbd->work_in_progress = 0;
+ local_irq_restore(flags);
+ /*
+ * interrupt that comes here will either queue a new work action
+ * since work_in_progress is cleared now, or be dealt with
+ * when we loop.
+ */
+ } while (loop);
+}
+
+
+static irqreturn_t gta02kbd_headphone_irq(int irq, void *dev_id)
+{
+ struct gta02kbd *gta02kbd_data = dev_id;
+
+ /*
+ * this interrupt is prone to bouncing and userspace doesn't like
+ * to have to deal with that kind of thing. So we do not accept
+ * that a jack interrupt is equal to a jack event. Instead we fire
+ * some work on the first interrupt, and it hangs about in 100ms units
+ * until no more interrupts come. Then it accepts the state it finds
+ * for jack insert and reports it once
+ */
+
+ gta02kbd_data->hp_irq_count++;
+ /*
+ * the first interrupt we see for a while, we fire the work item
+ * and record the interrupt count when we did that. If more interrupts
+ * come in the meanwhile, we can tell by the difference in that
+ * stored count and hp_irq_count which increments every interrupt
+ */
+ if (!gta02kbd_data->work_in_progress) {
+ gta02kbd_data->jack_irq = irq;
+ gta02kbd_data->hp_irq_count_in_work =
+ gta02kbd_data->hp_irq_count;
+ if (!schedule_work(>a02kbd_data->work))
+ printk(KERN_ERR
+ "Unable to schedule headphone debounce\n");
+ else
+ gta02kbd_data->work_in_progress = 1;
+ }
+
+ return IRQ_HANDLED;
+}
+
+#ifdef CONFIG_PM
+static int gta02kbd_suspend(struct platform_device *dev, pm_message_t state)
+{
+ disable_irq(keys[GTA02_KEY_AUX].irq);
+ del_timer_sync(&aux_key_timer);
+ return 0;
+}
+
+static int gta02kbd_resume(struct platform_device *dev)
+{
+ enable_irq(keys[GTA02_KEY_AUX].irq);
+ return 0;
+}
+#else
+#define gta02kbd_suspend NULL
+#define gta02kbd_resume NULL
+#endif
+
+static ssize_t gta02kbd_switch_name_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%s\n", "gta02 Headset Jack");
+}
+
+static ssize_t gta02kbd_switch_state_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct gta02kbd *kbd = dev_get_drvdata(dev);
+ return sprintf(buf, "%d\n",
+ gpio_get_value(kbd->pdev->resource[GTA02_KEY_JACK].start));
+}
+
+static DEVICE_ATTR(name, S_IRUGO , gta02kbd_switch_name_show, NULL);
+static DEVICE_ATTR(state, S_IRUGO , gta02kbd_switch_state_show, NULL);
+
+static int gta02kbd_probe(struct platform_device *pdev)
+{
+ struct gta02kbd *gta02kbd;
+ struct input_dev *input_dev;
+ int rc;
+ int irq;
+ int n;
+
+ gta02kbd = kzalloc(sizeof(struct gta02kbd), GFP_KERNEL);
+ input_dev = input_allocate_device();
+ if (!gta02kbd || !input_dev) {
+ kfree(gta02kbd);
+ input_free_device(input_dev);
+ return -ENOMEM;
+ }
+
+ gta02kbd->pdev = pdev;
+ timer_kbd = gta02kbd;
+
+ if (pdev->resource[0].flags != 0)
+ return -EINVAL;
+
+ platform_set_drvdata(pdev, gta02kbd);
+
+ gta02kbd->input = input_dev;
+
+ INIT_WORK(>a02kbd->work, gta02kbd_debounce_jack);
+
+ input_dev->name = "GTA02 Buttons";
+ input_dev->phys = "gta02kbd/input0";
+ input_dev->id.bustype = BUS_HOST;
+ input_dev->id.vendor = 0x0001;
+ input_dev->id.product = 0x0001;
+ input_dev->id.version = 0x0100;
+ input_dev->dev.parent = &pdev->dev;
+
+ input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_SW);
+ set_bit(SW_HEADPHONE_INSERT, input_dev->swbit);
+ set_bit(KEY_PHONE, input_dev->keybit);
+ set_bit(KEY_PAUSE, input_dev->keybit);
+
+ rc = input_register_device(gta02kbd->input);
+ if (rc)
+ goto out_register;
+
+ gta02kbd->cdev = device_create(gta02kbd_switch_class,
+ &pdev->dev, 0, gta02kbd, "headset");
+ if (unlikely(IS_ERR(gta02kbd->cdev))) {
+ rc = PTR_ERR(gta02kbd->cdev);
+ goto out_device_create;
+ }
+
+ rc = device_create_file(gta02kbd->cdev, &dev_attr_name);
+ if(rc)
+ goto out_device_create_file;
+
+ rc = device_create_file(gta02kbd->cdev, &dev_attr_state);
+ if(rc)
+ goto out_device_create_file;
+
+ /* register GPIO IRQs */
+ for(n = 0; n < min(pdev->num_resources, ARRAY_SIZE(keys)); n++) {
+
+ if (!pdev->resource[0].start)
+ continue;
+
+ irq = gpio_to_irq(pdev->resource[n].start);
+ if (irq < 0)
+ continue;
+
+ if (request_irq(irq, keys[n].isr, IRQF_DISABLED |
+ IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+ keys[n].name, gta02kbd)) {
+ dev_err(&pdev->dev, "Can't get IRQ %u\n", irq);
+
+ /* unwind any irq registrations and fail */
+
+ while (n > 0) {
+ n--;
+ free_irq(gpio_to_irq(pdev->resource[n].start),
+ gta02kbd);
+ }
+ goto out_device_create_file;
+ }
+
+ keys[n].irq = irq;
+ }
+
+ enable_irq_wake(keys[GTA02_KEY_JACK].irq);
+
+ return 0;
+
+out_device_create_file:
+ device_unregister(gta02kbd->cdev);
+out_device_create:
+ input_unregister_device(gta02kbd->input);
+out_register:
+ input_free_device(gta02kbd->input);
+ platform_set_drvdata(pdev, NULL);
+ kfree(gta02kbd);
+
+ return -ENODEV;
+}
+
+static int gta02kbd_remove(struct platform_device *pdev)
+{
+ struct gta02kbd *gta02kbd = platform_get_drvdata(pdev);
+
+ free_irq(gpio_to_irq(pdev->resource[2].start), gta02kbd);
+ free_irq(gpio_to_irq(pdev->resource[1].start), gta02kbd);
+ free_irq(gpio_to_irq(pdev->resource[0].start), gta02kbd);
+
+ device_unregister(gta02kbd->cdev);
+ input_unregister_device(gta02kbd->input);
+ input_free_device(gta02kbd->input);
+ platform_set_drvdata(pdev, NULL);
+ kfree(gta02kbd);
+
+ return 0;
+}
+
+static struct platform_driver gta02kbd_driver = {
+ .probe = gta02kbd_probe,
+ .remove = gta02kbd_remove,
+ .suspend = gta02kbd_suspend,
+ .resume = gta02kbd_resume,
+ .driver = {
+ .name = "gta02-button",
+ },
+};
+
+static int __devinit gta02kbd_init(void)
+{
+ gta02kbd_switch_class = class_create(THIS_MODULE, "switch");
+ if (IS_ERR(gta02kbd_switch_class))
+ return PTR_ERR(gta02kbd_switch_class);
+ return platform_driver_register(>a02kbd_driver);
+}
+
+static void __exit gta02kbd_exit(void)
+{
+ platform_driver_unregister(>a02kbd_driver);
+ class_destroy(gta02kbd_switch_class);
+}
+
+module_init(gta02kbd_init);
+module_exit(gta02kbd_exit);
+
+MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
+MODULE_DESCRIPTION("Openmoko Freerunner buttons input driver");
+MODULE_LICENSE("GPL");
diff --git a/target/linux/s3c24xx/files-2.6.30/drivers/input/misc/lis302dl.c b/target/linux/s3c24xx/files-2.6.30/drivers/input/misc/lis302dl.c
new file mode 100644
index 0000000..dc6602a
--- /dev/null
+++ b/target/linux/s3c24xx/files-2.6.30/drivers/input/misc/lis302dl.c
@@ -0,0 +1,957 @@
+/* Linux kernel driver for the ST LIS302D 3-axis accelerometer
+ *
+ * Copyright (C) 2007-2008 by Openmoko, Inc.
+ * Author: Harald Welte <laforge@openmoko.org>
+ * converted to private bitbang by:
+ * Andy Green <andy@openmoko.com>
+ * ability to set acceleration threshold added by:
+ * Simon Kagstrom <simon.kagstrom@gmail.com>
+ * All rights reserved.
+ *
+ * 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
+ *
+ * TODO
+ * * statistics for overflow events
+ * * configuration interface (sysfs) for
+ * * enable/disable x/y/z axis data ready
+ * * enable/disable resume from freee fall / click
+ * * free fall / click parameters
+ * * high pass filter parameters
+ */
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/sysfs.h>
+#include <linux/spi/spi.h>
+
+#include <linux/lis302dl.h>
+
+/* Utility functions */
+static u8 __reg_read(struct lis302dl_info *lis, u8 reg)
+{
+ struct spi_message msg;
+ struct spi_transfer t;
+ u8 data[2] = {0xc0 | reg};
+ int rc;
+
+ spi_message_init(&msg);
+ memset(&t, 0, sizeof t);
+ t.len = 2;
+ spi_message_add_tail(&t, &msg);
+ t.tx_buf = &data[0];
+ t.rx_buf = &data[0];
+
+ /* Should complete without blocking */
+ rc = spi_non_blocking_transfer(lis->spi, &msg);
+ if (rc < 0) {
+ dev_err(lis->dev, "Error reading register\n");
+ return rc;
+ }
+
+ return data[1];
+}
+
+static void __reg_write(struct lis302dl_info *lis, u8 reg, u8 val)
+{
+ struct spi_message msg;
+ struct spi_transfer t;
+ u8 data[2] = {reg, val};
+
+ spi_message_init(&msg);
+ memset(&t, 0, sizeof t);
+ t.len = 2;
+ spi_message_add_tail(&t, &msg);
+ t.tx_buf = &data[0];
+ t.rx_buf = &data[0];
+
+ /* Completes without blocking */
+ if (spi_non_blocking_transfer(lis->spi, &msg) < 0)
+ dev_err(lis->dev, "Error writing register\n");
+}
+
+static void __reg_set_bit_mask(struct lis302dl_info *lis, u8 reg, u8 mask,
+ u8 val)
+{
+ u_int8_t tmp;
+
+ val &= mask;
+
+ tmp = __reg_read(lis, reg);
+ tmp &= ~mask;
+ tmp |= val;
+ __reg_write(lis, reg, tmp);
+}
+
+static int __ms_to_duration(struct lis302dl_info *lis, int ms)
+{
+ /* If we have 400 ms sampling rate, the stepping is 2.5 ms,
+ * on 100 ms the stepping is 10ms */
+ if (lis->flags & LIS302DL_F_DR)
+ return min((ms * 10) / 25, 637);
+
+ return min(ms / 10, 2550);
+}
+
+static int __duration_to_ms(struct lis302dl_info *lis, int duration)
+{
+ if (lis->flags & LIS302DL_F_DR)
+ return (duration * 25) / 10;
+
+ return duration * 10;
+}
+
+static u8 __mg_to_threshold(struct lis302dl_info *lis, int mg)
+{
+ /* If FS is set each bit is 71mg, otherwise 18mg. The THS register
+ * has 7 bits for the threshold value */
+ if (lis->flags & LIS302DL_F_FS)
+ return min(mg / 71, 127);
+
+ return min(mg / 18, 127);
+}
+
+static int __threshold_to_mg(struct lis302dl_info *lis, u8 threshold)
+{
+ if (lis->flags & LIS302DL_F_FS)
+ return threshold * 71;
+
+ return threshold * 18;
+}
+
+/* interrupt handling related */
+
+enum lis302dl_intmode {
+ LIS302DL_INTMODE_GND = 0x00,
+ LIS302DL_INTMODE_FF_WU_1 = 0x01,
+ LIS302DL_INTMODE_FF_WU_2 = 0x02,
+ LIS302DL_INTMODE_FF_WU_12 = 0x03,
+ LIS302DL_INTMODE_DATA_READY = 0x04,
+ LIS302DL_INTMODE_CLICK = 0x07,
+};
+
+static void __lis302dl_int_mode(struct device *dev, int int_pin,
+ enum lis302dl_intmode mode)
+{
+ struct lis302dl_info *lis = dev_get_drvdata(dev);
+
+ switch (int_pin) {
+ case 1:
+ __reg_set_bit_mask(lis, LIS302DL_REG_CTRL3, 0x07, mode);
+ break;
+ case 2:
+ __reg_set_bit_mask(lis, LIS302DL_REG_CTRL3, 0x38, mode << 3);
+ break;
+ default:
+ BUG();
+ }
+}
+
+static void __enable_wakeup(struct lis302dl_info *lis)
+{
+ __reg_write(lis, LIS302DL_REG_CTRL1, 0);
+
+ /* First zero to get to a known state */
+ __reg_write(lis, LIS302DL_REG_FF_WU_CFG_1, LIS302DL_FFWUCFG_XHIE |
+ LIS302DL_FFWUCFG_YHIE | LIS302DL_FFWUCFG_ZHIE |
+ LIS302DL_FFWUCFG_LIR);
+ __reg_write(lis, LIS302DL_REG_FF_WU_THS_1,
+ __mg_to_threshold(lis, lis->wakeup.threshold));
+ __reg_write(lis, LIS302DL_REG_FF_WU_DURATION_1,
+ __ms_to_duration(lis, lis->wakeup.duration));
+
+ /* Route the interrupt for wakeup */
+ __lis302dl_int_mode(lis->dev, 1,
+ LIS302DL_INTMODE_FF_WU_1);
+
+ __reg_read(lis, LIS302DL_REG_HP_FILTER_RESET);
+ __reg_read(lis, LIS302DL_REG_OUT_X);
+ __reg_read(lis, LIS302DL_REG_OUT_Y);
+ __reg_read(lis, LIS302DL_REG_OUT_Z);
+ __reg_read(lis, LIS302DL_REG_STATUS);
+ __reg_read(lis, LIS302DL_REG_FF_WU_SRC_1);
+ __reg_read(lis, LIS302DL_REG_FF_WU_SRC_2);
+ __reg_write(lis, LIS302DL_REG_CTRL1, LIS302DL_CTRL1_PD | 7);
+}
+
+static void __enable_data_collection(struct lis302dl_info *lis)
+{
+ u_int8_t ctrl1 = LIS302DL_CTRL1_PD | LIS302DL_CTRL1_Xen |
+ LIS302DL_CTRL1_Yen | LIS302DL_CTRL1_Zen;
+
+ /* make sure we're powered up and generate data ready */
+ __reg_set_bit_mask(lis, LIS302DL_REG_CTRL1, ctrl1, ctrl1);
+
+ /* If the threshold is zero, let the device generated an interrupt
+ * on each datum */
+ if (lis->threshold == 0) {
+ __reg_write(lis, LIS302DL_REG_CTRL2, 0);
+ __lis302dl_int_mode(lis->dev, 1, LIS302DL_INTMODE_DATA_READY);
+ __lis302dl_int_mode(lis->dev, 2, LIS302DL_INTMODE_DATA_READY);
+ } else {
+ __reg_write(lis, LIS302DL_REG_CTRL2,
+ LIS302DL_CTRL2_HPFF1);
+ __reg_write(lis, LIS302DL_REG_FF_WU_THS_1,
+ __mg_to_threshold(lis, lis->threshold));
+ __reg_write(lis, LIS302DL_REG_FF_WU_DURATION_1,
+ __ms_to_duration(lis, lis->duration));
+
+ /* Clear the HP filter "starting point" */
+ __reg_read(lis, LIS302DL_REG_HP_FILTER_RESET);
+ __reg_write(lis, LIS302DL_REG_FF_WU_CFG_1,
+ LIS302DL_FFWUCFG_XHIE | LIS302DL_FFWUCFG_YHIE |
+ LIS302DL_FFWUCFG_ZHIE | LIS302DL_FFWUCFG_LIR);
+ __lis302dl_int_mode(lis->dev, 1, LIS302DL_INTMODE_FF_WU_12);
+ __lis302dl_int_mode(lis->dev, 2, LIS302DL_INTMODE_FF_WU_12);
+ }
+}
+
+#if 0
+static void _report_btn_single(struct input_dev *inp, int btn)
+{
+ input_report_key(inp, btn, 1);
+ input_sync(inp);
+ input_report_key(inp, btn, 0);
+}
+
+static void _report_btn_double(struct input_dev *inp, int btn)
+{
+ input_report_key(inp, btn, 1);
+ input_sync(inp);
+ input_report_key(inp, btn, 0);
+ input_sync(inp);
+ input_report_key(inp, btn, 1);
+ input_sync(inp);
+ input_report_key(inp, btn, 0);
+}
+#endif
+
+
+static void lis302dl_bitbang_read_sample(struct lis302dl_info *lis)
+{
+ u8 data[(LIS302DL_REG_OUT_Z - LIS302DL_REG_STATUS) + 2] = {0xC0 | LIS302DL_REG_STATUS};
+ u8 *read = data + 1;
+ unsigned long flags;
+ int mg_per_sample = __threshold_to_mg(lis, 1);
+ struct spi_message msg;
+ struct spi_transfer t;
+
+ spi_message_init(&msg);
+ memset(&t, 0, sizeof t);
+ t.len = sizeof(data);
+ spi_message_add_tail(&t, &msg);
+ t.tx_buf = &data[0];
+ t.rx_buf = &data[0];
+
+ /* grab the set of register containing status and XYZ data */
+
+ local_irq_save(flags);
+
+ /* Should complete without blocking */
+ if (spi_non_blocking_transfer(lis->spi, &msg) < 0)
+ dev_err(lis->dev, "Error reading registers\n");
+
+ local_irq_restore(flags);
+
+ /*
+ * at the minute the test below fails 50% of the time due to
+ * a problem with level interrupts causing ISRs to get called twice.
+ * This is a workaround for that, but actually this test is still
+ * valid and the information can be used for overrrun stats.
+ */
+
+ /* has any kind of overrun been observed by the lis302dl? */
+ if (read[0] & (LIS302DL_STATUS_XOR |
+ LIS302DL_STATUS_YOR |
+ LIS302DL_STATUS_ZOR))
+ lis->overruns++;
+
+ /* we have a valid sample set? */
+ if (read[0] & LIS302DL_STATUS_XYZDA) {
+ input_report_abs(lis->input_dev, ABS_X, mg_per_sample *
+ (s8)read[LIS302DL_REG_OUT_X - LIS302DL_REG_STATUS]);
+ input_report_abs(lis->input_dev, ABS_Y, mg_per_sample *
+ (s8)read[LIS302DL_REG_OUT_Y - LIS302DL_REG_STATUS]);
+ input_report_abs(lis->input_dev, ABS_Z, mg_per_sample *
+ (s8)read[LIS302DL_REG_OUT_Z - LIS302DL_REG_STATUS]);
+
+ input_sync(lis->input_dev);
+ }
+
+ if (lis->threshold)
+ /* acknowledge the wakeup source */
+ __reg_read(lis, LIS302DL_REG_FF_WU_SRC_1);
+}
+
+static irqreturn_t lis302dl_interrupt(int irq, void *_lis)
+{
+ struct lis302dl_info *lis = _lis;
+
+ lis302dl_bitbang_read_sample(lis);
+ return IRQ_HANDLED;
+}
+
+/* sysfs */
+
+static ssize_t show_overruns(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct lis302dl_info *lis = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", lis->overruns);
+}
+
+static DEVICE_ATTR(overruns, S_IRUGO, show_overruns, NULL);
+
+static ssize_t show_rate(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct lis302dl_info *lis = dev_get_drvdata(dev);
+ u8 ctrl1;
+ unsigned long flags;
+
+ local_irq_save(flags);
+ ctrl1 = __reg_read(lis, LIS302DL_REG_CTRL1);
+ local_irq_restore(flags);
+
+ return sprintf(buf, "%d\n", ctrl1 & LIS302DL_CTRL1_DR ? 400 : 100);
+}
+
+static ssize_t set_rate(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct lis302dl_info *lis = dev_get_drvdata(dev);
+ unsigned long flags;
+
+ local_irq_save(flags);
+
+ if (!strcmp(buf, "400\n")) {
+ __reg_set_bit_mask(lis, LIS302DL_REG_CTRL1, LIS302DL_CTRL1_DR,
+ LIS302DL_CTRL1_DR);
+ lis->flags |= LIS302DL_F_DR;
+ } else {
+ __reg_set_bit_mask(lis, LIS302DL_REG_CTRL1, LIS302DL_CTRL1_DR,
+ 0);
+ lis->flags &= ~LIS302DL_F_DR;
+ }
+ local_irq_restore(flags);
+
+ return count;
+}
+
+static DEVICE_ATTR(sample_rate, S_IRUGO | S_IWUSR, show_rate, set_rate);
+
+static ssize_t show_scale(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct lis302dl_info *lis = dev_get_drvdata(dev);
+ u_int8_t ctrl1;
+ unsigned long flags;
+
+ local_irq_save(flags);
+ ctrl1 = __reg_read(lis, LIS302DL_REG_CTRL1);
+ local_irq_restore(flags);
+
+ return sprintf(buf, "%s\n", ctrl1 & LIS302DL_CTRL1_FS ? "9.2" : "2.3");
+}
+
+static ssize_t set_scale(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct lis302dl_info *lis = dev_get_drvdata(dev);
+ unsigned long flags;
+
+ local_irq_save(flags);
+
+ if (!strcmp(buf, "9.2\n")) {
+ __reg_set_bit_mask(lis, LIS302DL_REG_CTRL1, LIS302DL_CTRL1_FS,
+ LIS302DL_CTRL1_FS);
+ lis->flags |= LIS302DL_F_FS;
+ } else {
+ __reg_set_bit_mask(lis, LIS302DL_REG_CTRL1, LIS302DL_CTRL1_FS,
+ 0);
+ lis->flags &= ~LIS302DL_F_FS;
+ }
+
+ if (lis->flags & LIS302DL_F_INPUT_OPEN)
+ __enable_data_collection(lis);
+
+ local_irq_restore(flags);
+
+ return count;
+}
+
+static DEVICE_ATTR(full_scale, S_IRUGO | S_IWUSR, show_scale, set_scale);
+
+static ssize_t show_threshold(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct lis302dl_info *lis = dev_get_drvdata(dev);
+
+ /* Display the device view of the threshold setting */
+ return sprintf(buf, "%d\n", __threshold_to_mg(lis,
+ __mg_to_threshold(lis, lis->threshold)));
+}
+
+static ssize_t set_threshold(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct lis302dl_info *lis = dev_get_drvdata(dev);
+ unsigned int val;
+
+ if (sscanf(buf, "%u\n", &val) != 1)
+ return -EINVAL;
+ /* 8g is the maximum if FS is 1 */
+ if (val > 8000)
+ return -ERANGE;
+
+ /* Set the threshold and write it out if the device is used */
+ lis->threshold = val;
+
+ if (lis->flags & LIS302DL_F_INPUT_OPEN) {
+ unsigned long flags;
+
+ local_irq_save(flags);
+ __enable_data_collection(lis);
+ local_irq_restore(flags);
+ }
+
+ return count;
+}
+
+static DEVICE_ATTR(threshold, S_IRUGO | S_IWUSR, show_threshold, set_threshold);
+
+static ssize_t show_duration(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct lis302dl_info *lis = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%d\n", __duration_to_ms(lis,
+ __ms_to_duration(lis, lis->duration)));
+}
+
+static ssize_t set_duration(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct lis302dl_info *lis = dev_get_drvdata(dev);
+ unsigned int val;
+
+ if (sscanf(buf, "%u\n", &val) != 1)
+ return -EINVAL;
+ if (val > 2550)
+ return -ERANGE;
+
+ lis->duration = val;
+ if (lis->flags & LIS302DL_F_INPUT_OPEN)
+ __reg_write(lis, LIS302DL_REG_FF_WU_DURATION_1,
+ __ms_to_duration(lis, lis->duration));
+
+ return count;
+}
+
+static DEVICE_ATTR(duration, S_IRUGO | S_IWUSR, show_duration, set_duration);
+
+static ssize_t lis302dl_dump(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct lis302dl_info *lis = dev_get_drvdata(dev);
+ int n = 0;
+ u8 reg[0x40];
+ char *end = buf;
+ unsigned long flags;
+
+ local_irq_save(flags);
+
+ for (n = 0; n < sizeof(reg); n++)
+ reg[n] = __reg_read(lis, n);
+
+ local_irq_restore(flags);
+
+ for (n = 0; n < sizeof(reg); n += 16) {
+ hex_dump_to_buffer(reg + n, 16, 16, 1, end, 128, 0);
+ end += strlen(end);
+ *end++ = '\n';
+ *end++ = '\0';
+ }
+
+ return end - buf;
+}
+static DEVICE_ATTR(dump, S_IRUGO, lis302dl_dump, NULL);
+
+/* Configure freefall/wakeup interrupts */
+static ssize_t set_wakeup_threshold(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct lis302dl_info *lis = dev_get_drvdata(dev);
+ unsigned int threshold;
+
+ if (sscanf(buf, "%u\n", &threshold) != 1)
+ return -EINVAL;
+
+ if (threshold > 8000)
+ return -ERANGE;
+
+ /* Zero turns the feature off */
+ if (threshold == 0) {
+ if (lis->flags & LIS302DL_F_IRQ_WAKE) {
+ disable_irq_wake(lis->pdata->interrupt);
+ lis->flags &= ~LIS302DL_F_IRQ_WAKE;
+ }
+
+ return count;
+ }
+
+ lis->wakeup.threshold = threshold;
+
+ if (!(lis->flags & LIS302DL_F_IRQ_WAKE)) {
+ enable_irq_wake(lis->pdata->interrupt);
+ lis->flags |= LIS302DL_F_IRQ_WAKE;
+ }
+
+ return count;
+}
+
+static ssize_t show_wakeup_threshold(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct lis302dl_info *lis = dev_get_drvdata(dev);
+
+ /* All events off? */
+ if (lis->wakeup.threshold == 0)
+ return sprintf(buf, "off\n");
+
+ return sprintf(buf, "%u\n", lis->wakeup.threshold);
+}
+
+static DEVICE_ATTR(wakeup_threshold, S_IRUGO | S_IWUSR, show_wakeup_threshold,
+ set_wakeup_threshold);
+
+static ssize_t set_wakeup_duration(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct lis302dl_info *lis = dev_get_drvdata(dev);
+ unsigned int duration;
+
+ if (sscanf(buf, "%u\n", &duration) != 1)
+ return -EINVAL;
+
+ if (duration > 2550)
+ return -ERANGE;
+
+ lis->wakeup.duration = duration;
+
+ return count;
+}
+
+static ssize_t show_wakeup_duration(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct lis302dl_info *lis = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%u\n", lis->wakeup.duration);
+}
+
+static DEVICE_ATTR(wakeup_duration, S_IRUGO | S_IWUSR, show_wakeup_duration,
+ set_wakeup_duration);
+
+static struct attribute *lis302dl_sysfs_entries[] = {
+ &dev_attr_sample_rate.attr,
+ &dev_attr_full_scale.attr,
+ &dev_attr_threshold.attr,
+ &dev_attr_duration.attr,
+ &dev_attr_dump.attr,
+ &dev_attr_wakeup_threshold.attr,
+ &dev_attr_wakeup_duration.attr,
+ &dev_attr_overruns.attr,
+ NULL
+};
+
+static struct attribute_group lis302dl_attr_group = {
+ .name = NULL,
+ .attrs = lis302dl_sysfs_entries,
+};
+
+/* input device handling and driver core interaction */
+
+static int lis302dl_input_open(struct input_dev *inp)
+{
+ struct lis302dl_info *lis = input_get_drvdata(inp);
+ unsigned long flags;
+
+ local_irq_save(flags);
+
+ __enable_data_collection(lis);
+ lis->flags |= LIS302DL_F_INPUT_OPEN;
+
+ local_irq_restore(flags);
+
+ return 0;
+}
+
+static void lis302dl_input_close(struct input_dev *inp)
+{
+ struct lis302dl_info *lis = input_get_drvdata(inp);
+ u_int8_t ctrl1 = LIS302DL_CTRL1_Xen | LIS302DL_CTRL1_Yen |
+ LIS302DL_CTRL1_Zen;
+ unsigned long flags;
+
+ local_irq_save(flags);
+
+ /* since the input core already serializes access and makes sure we
+ * only see close() for the close of the last user, we can safely
+ * disable the data ready events */
+ __reg_set_bit_mask(lis, LIS302DL_REG_CTRL1, ctrl1, 0x00);
+ lis->flags &= ~LIS302DL_F_INPUT_OPEN;
+
+ /* however, don't power down the whole device if still needed */
+ if (!(lis->flags & LIS302DL_F_WUP_FF ||
+ lis->flags & LIS302DL_F_WUP_CLICK)) {
+ __reg_set_bit_mask(lis, LIS302DL_REG_CTRL1, LIS302DL_CTRL1_PD,
+ 0x00);
+ }
+ local_irq_restore(flags);
+}
+
+/* get the device to reload its coefficients from EEPROM and wait for it
+ * to complete
+ */
+
+static int __lis302dl_reset_device(struct lis302dl_info *lis)
+{
+ int timeout = 10;
+
+ __reg_write(lis, LIS302DL_REG_CTRL2,
+ LIS302DL_CTRL2_BOOT | LIS302DL_CTRL2_FDS);
+
+ while ((__reg_read(lis, LIS302DL_REG_CTRL2)
+ & LIS302DL_CTRL2_BOOT) && (timeout--))
+ mdelay(1);
+
+ return !!(timeout < 0);
+}
+
+static int __devinit lis302dl_probe(struct spi_device *spi)
+{
+ int rc;
+ struct lis302dl_info *lis;
+ u_int8_t wai;
+ unsigned long flags;
+ struct lis302dl_platform_data *pdata = spi->dev.platform_data;
+
+ spi->mode = SPI_MODE_3;
+ rc = spi_setup(spi);
+ if (rc < 0) {
+ dev_err(&spi->dev, "spi_setup failed\n");
+ return rc;
+ }
+
+ lis = kzalloc(sizeof(*lis), GFP_KERNEL);
+ if (!lis)
+ return -ENOMEM;
+
+ lis->dev = &spi->dev;
+ lis->spi = spi;
+
+ dev_set_drvdata(lis->dev, lis);
+
+ lis->pdata = pdata;
+
+ rc = sysfs_create_group(&lis->dev->kobj, &lis302dl_attr_group);
+ if (rc) {
+ dev_err(lis->dev, "error creating sysfs group\n");
+ goto bail_free_lis;
+ }
+
+ /* initialize input layer details */
+ lis->input_dev = input_allocate_device();
+ if (!lis->input_dev) {
+ dev_err(lis->dev, "Unable to allocate input device\n");
+ goto bail_sysfs;
+ }
+
+ input_set_drvdata(lis->input_dev, lis);
+ lis->input_dev->name = pdata->name;
+ /* SPI Bus not defined as a valid bus for input subsystem*/
+ lis->input_dev->id.bustype = BUS_I2C; /* lie about it */
+ lis->input_dev->open = lis302dl_input_open;
+ lis->input_dev->close = lis302dl_input_close;
+
+ rc = input_register_device(lis->input_dev);
+ if (rc) {
+ dev_err(lis->dev, "error %d registering input device\n", rc);
+ goto bail_inp_dev;
+ }
+
+ local_irq_save(flags);
+ /* Configure our IO */
+ (lis->pdata->lis302dl_suspend_io)(lis, 1);
+
+ wai = __reg_read(lis, LIS302DL_REG_WHO_AM_I);
+ if (wai != LIS302DL_WHO_AM_I_MAGIC) {
+ dev_err(lis->dev, "unknown who_am_i signature 0x%02x\n", wai);
+ dev_set_drvdata(lis->dev, NULL);
+ rc = -ENODEV;
+ local_irq_restore(flags);
+ goto bail_inp_reg;
+ }
+
+ set_bit(EV_ABS, lis->input_dev->evbit);
+ input_set_abs_params(lis->input_dev, ABS_X, 0, 0, 0, 0);
+ input_set_abs_params(lis->input_dev, ABS_Y, 0, 0, 0, 0);
+ input_set_abs_params(lis->input_dev, ABS_Z, 0, 0, 0, 0);
+
+ lis->threshold = 0;
+ lis->duration = 0;
+ memset(&lis->wakeup, 0, sizeof(lis->wakeup));
+
+ if (__lis302dl_reset_device(lis))
+ dev_err(lis->dev, "device BOOT reload failed\n");
+
+ /* force us powered */
+ __reg_write(lis, LIS302DL_REG_CTRL1, LIS302DL_CTRL1_PD |
+ LIS302DL_CTRL1_Xen |
+ LIS302DL_CTRL1_Yen |
+ LIS302DL_CTRL1_Zen);
+ mdelay(1);
+
+ __reg_write(lis, LIS302DL_REG_CTRL2, 0);
+ __reg_write(lis, LIS302DL_REG_CTRL3,
+ LIS302DL_CTRL3_PP_OD | LIS302DL_CTRL3_IHL);
+ __reg_write(lis, LIS302DL_REG_FF_WU_THS_1, 0x0);
+ __reg_write(lis, LIS302DL_REG_FF_WU_DURATION_1, 0x00);
+ __reg_write(lis, LIS302DL_REG_FF_WU_CFG_1, 0x0);
+
+ /* start off in powered down mode; we power up when someone opens us */
+ __reg_write(lis, LIS302DL_REG_CTRL1, LIS302DL_CTRL1_Xen |
+ LIS302DL_CTRL1_Yen | LIS302DL_CTRL1_Zen);
+
+ if (pdata->open_drain)
+ /* switch interrupt to open collector, active-low */
+ __reg_write(lis, LIS302DL_REG_CTRL3,
+ LIS302DL_CTRL3_PP_OD | LIS302DL_CTRL3_IHL);
+ else
+ /* push-pull, active-low */
+ __reg_write(lis, LIS302DL_REG_CTRL3, LIS302DL_CTRL3_IHL);
+
+ __lis302dl_int_mode(lis->dev, 1, LIS302DL_INTMODE_GND);
+ __lis302dl_int_mode(lis->dev, 2, LIS302DL_INTMODE_GND);
+
+ __reg_read(lis, LIS302DL_REG_STATUS);
+ __reg_read(lis, LIS302DL_REG_FF_WU_SRC_1);
+ __reg_read(lis, LIS302DL_REG_FF_WU_SRC_2);
+ __reg_read(lis, LIS302DL_REG_CLICK_SRC);
+ local_irq_restore(flags);
+
+ dev_info(lis->dev, "Found %s\n", pdata->name);
+
+ lis->pdata = pdata;
+
+ set_irq_handler(lis->pdata->interrupt, handle_level_irq);
+
+ rc = request_irq(lis->pdata->interrupt, lis302dl_interrupt,
+ IRQF_TRIGGER_LOW, "lis302dl", lis);
+
+ if (rc < 0) {
+ dev_err(lis->dev, "error requesting IRQ %d\n",
+ lis->pdata->interrupt);
+ goto bail_inp_reg;
+ }
+ return 0;
+
+bail_inp_reg:
+ input_unregister_device(lis->input_dev);
+bail_inp_dev:
+ input_free_device(lis->input_dev);
+bail_sysfs:
+ sysfs_remove_group(&lis->dev->kobj, &lis302dl_attr_group);
+bail_free_lis:
+ kfree(lis);
+ return rc;
+}
+
+static int __devexit lis302dl_remove(struct spi_device *spi)
+{
+ struct lis302dl_info *lis = dev_get_drvdata(&spi->dev);
+ unsigned long flags;
+
+ /* Disable interrupts */
+ if (lis->flags & LIS302DL_F_IRQ_WAKE)
+ disable_irq_wake(lis->pdata->interrupt);
+ free_irq(lis->pdata->interrupt, lis);
+
+ /* Reset and power down the device */
+ local_irq_save(flags);
+ __reg_write(lis, LIS302DL_REG_CTRL3, 0x00);
+ __reg_write(lis, LIS302DL_REG_CTRL2, 0x00);
+ __reg_write(lis, LIS302DL_REG_CTRL1, 0x00);
+ local_irq_restore(flags);
+
+ /* Cleanup resources */
+ sysfs_remove_group(&spi->dev.kobj, &lis302dl_attr_group);
+ input_unregister_device(lis->input_dev);
+ if (lis->input_dev)
+ input_free_device(lis->input_dev);
+ dev_set_drvdata(lis->dev, NULL);
+ kfree(lis);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+
+static u8 regs_to_save[] = {
+ LIS302DL_REG_CTRL1,
+ LIS302DL_REG_CTRL2,
+ LIS302DL_REG_CTRL3,
+ LIS302DL_REG_FF_WU_CFG_1,
+ LIS302DL_REG_FF_WU_THS_1,
+ LIS302DL_REG_FF_WU_DURATION_1,
+ LIS302DL_REG_FF_WU_CFG_2,
+ LIS302DL_REG_FF_WU_THS_2,
+ LIS302DL_REG_FF_WU_DURATION_2,
+ LIS302DL_REG_CLICK_CFG,
+ LIS302DL_REG_CLICK_THSY_X,
+ LIS302DL_REG_CLICK_THSZ,
+ LIS302DL_REG_CLICK_TIME_LIMIT,
+ LIS302DL_REG_CLICK_LATENCY,
+ LIS302DL_REG_CLICK_WINDOW,
+
+};
+
+static int lis302dl_suspend(struct spi_device *spi, pm_message_t state)
+{
+ struct lis302dl_info *lis = dev_get_drvdata(&spi->dev);
+ unsigned long flags;
+ u_int8_t tmp;
+ int n;
+
+ /* determine if we want to wake up from the accel. */
+ if (lis->flags & LIS302DL_F_WUP_CLICK)
+ return 0;
+
+ disable_irq(lis->pdata->interrupt);
+ local_irq_save(flags);
+
+ /*
+ * When we share SPI over multiple sensors, there is a race here
+ * that one or more sensors will lose. In that case, the shared
+ * SPI bus GPIO will be in sleep mode and partially pulled down. So
+ * we explicitly put our IO into "wake" mode here before the final
+ * traffic to the sensor.
+ */
+ (lis->pdata->lis302dl_suspend_io)(lis, 1);
+
+ /* save registers */
+ for (n = 0; n < ARRAY_SIZE(regs_to_save); n++)
+ lis->regs[regs_to_save[n]] =
+ __reg_read(lis, regs_to_save[n]);
+
+ /* power down or enable wakeup */
+
+ if (lis->wakeup.threshold == 0) {
+ tmp = __reg_read(lis, LIS302DL_REG_CTRL1);
+ tmp &= ~LIS302DL_CTRL1_PD;
+ __reg_write(lis, LIS302DL_REG_CTRL1, tmp);
+ } else
+ __enable_wakeup(lis);
+
+ /* place our IO to the device in sleep-compatible states */
+ (lis->pdata->lis302dl_suspend_io)(lis, 0);
+
+ local_irq_restore(flags);
+
+ return 0;
+}
+
+static int lis302dl_resume(struct spi_device *spi)
+{
+ struct lis302dl_info *lis = dev_get_drvdata(&spi->dev);
+ unsigned long flags;
+ int n;
+
+ if (lis->flags & LIS302DL_F_WUP_CLICK)
+ return 0;
+
+ local_irq_save(flags);
+
+ /* get our IO to the device back in operational states */
+ (lis->pdata->lis302dl_suspend_io)(lis, 1);
+
+ /* resume from powerdown first! */
+ __reg_write(lis, LIS302DL_REG_CTRL1,
+ LIS302DL_CTRL1_PD |
+ LIS302DL_CTRL1_Xen |
+ LIS302DL_CTRL1_Yen |
+ LIS302DL_CTRL1_Zen);
+ mdelay(1);
+
+ if (__lis302dl_reset_device(lis))
+ dev_err(&spi->dev, "device BOOT reload failed\n");
+
+ lis->regs[LIS302DL_REG_CTRL1] |= LIS302DL_CTRL1_PD |
+ LIS302DL_CTRL1_Xen |
+ LIS302DL_CTRL1_Yen |
+ LIS302DL_CTRL1_Zen;
+
+ /* restore registers after resume */
+ for (n = 0; n < ARRAY_SIZE(regs_to_save); n++)
+ __reg_write(lis, regs_to_save[n], lis->regs[regs_to_save[n]]);
+
+ /* if someone had us open, reset the non-wake threshold stuff */
+ if (lis->flags & LIS302DL_F_INPUT_OPEN)
+ __enable_data_collection(lis);
+
+ local_irq_restore(flags);
+ enable_irq(lis->pdata->interrupt);
+
+ return 0;
+}
+#else
+#define lis302dl_suspend NULL
+#define lis302dl_resume NULL
+#endif
+
+static struct spi_driver lis302dl_spi_driver = {
+ .driver = {
+ .name = "lis302dl",
+ .owner = THIS_MODULE,
+ },
+
+ .probe = lis302dl_probe,
+ .remove = __devexit_p(lis302dl_remove),
+ .suspend = lis302dl_suspend,
+ .resume = lis302dl_resume,
+};
+
+static int __devinit lis302dl_init(void)
+{
+ return spi_register_driver(&lis302dl_spi_driver);
+}
+
+static void __exit lis302dl_exit(void)
+{
+ spi_unregister_driver(&lis302dl_spi_driver);
+}
+
+MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
+MODULE_LICENSE("GPL");
+
+module_init(lis302dl_init);
+module_exit(lis302dl_exit);
diff --git a/target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/s3c2410_ts.c b/target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/s3c2410_ts.c
new file mode 100644
index 0000000..f980bfc
--- /dev/null
+++ b/target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/s3c2410_ts.c
@@ -0,0 +1,593 @@
+/*
+ * 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
+ *
+ * Copyright (c) 2004 Arnaud Patard <arnaud.patard@rtp-net.org>
+ * iPAQ H1940 touchscreen support
+ *
+ * ChangeLog
+ *
+ * 2004-09-05: Herbert Pötzl <herbert@13thfloor.at>
+ * - added clock (de-)allocation code
+ *
+ * 2005-03-06: Arnaud Patard <arnaud.patard@rtp-net.org>
+ * - h1940_ -> s3c2410 (this driver is now also used on the n30
+ * machines :P)
+ * - Debug messages are now enabled with the config option
+ * TOUCHSCREEN_S3C2410_DEBUG
+ * - Changed the way the value are read
+ * - Input subsystem should now work
+ * - Use ioremap and readl/writel
+ *
+ * 2005-03-23: Arnaud Patard <arnaud.patard@rtp-net.org>
+ * - Make use of some undocumented features of the touchscreen
+ * controller
+ *
+ * 2007-05-23: Harald Welte <laforge@openmoko.org>
+ * - Add proper support for S32440
+ *
+ * 2008-06-23: Andy Green <andy@openmoko.com>
+ * - removed averaging system
+ * - added generic Touchscreen filter stuff
+ *
+ * 2008-11-27: Nelson Castillo <arhuaco@freaks-unidos.net>
+ * - improve interrupt handling
+ */
+
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/init.h>
+#include <linux/serio.h>
+#include <linux/timer.h>
+#include <linux/kfifo.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+
+#include <mach/regs-gpio.h>
+#include <mach/ts.h>
+#include <mach/hardware.h>
+#include <plat/regs-adc.h>
+
+#include <linux/touchscreen/ts_filter_chain.h>
+
+/* For ts.dev.id.version */
+#define S3C2410TSVERSION 0x0101
+
+#define TSC_SLEEP (S3C2410_ADCTSC_PULL_UP_DISABLE | S3C2410_ADCTSC_XY_PST(0))
+
+#define WAIT4INT(x) (((x)<<8) | \
+ S3C2410_ADCTSC_YM_SEN | \
+ S3C2410_ADCTSC_YP_SEN | \
+ S3C2410_ADCTSC_XP_SEN | \
+ S3C2410_ADCTSC_XY_PST(3))
+
+#define AUTOPST (S3C2410_ADCTSC_YM_SEN | \
+ S3C2410_ADCTSC_YP_SEN | \
+ S3C2410_ADCTSC_XP_SEN | \
+ S3C2410_ADCTSC_AUTO_PST | \
+ S3C2410_ADCTSC_XY_PST(0))
+
+#define DEBUG_LVL KERN_DEBUG
+
+MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
+MODULE_DESCRIPTION("s3c2410 touchscreen driver");
+MODULE_LICENSE("GPL");
+
+/*
+ * Definitions & global arrays.
+ */
+
+static char *s3c2410ts_name = "s3c2410 TouchScreen";
+
+#define TS_RELEASE_TIMEOUT (HZ >> 7 ? HZ >> 7 : 1) /* 8ms (5ms if HZ is 200) */
+#define TS_EVENT_FIFO_SIZE (2 << 6) /* must be a power of 2 */
+
+#define TS_STATE_STANDBY 0 /* initial state */
+#define TS_STATE_PRESSED 1
+#define TS_STATE_RELEASE_PENDING 2
+#define TS_STATE_RELEASE 3
+
+/*
+ * Per-touchscreen data.
+ */
+
+struct s3c2410ts {
+ struct input_dev *dev;
+ struct ts_filter_chain *chain;
+ int is_down;
+ int state;
+ struct kfifo *event_fifo;
+};
+
+static struct s3c2410ts ts;
+
+static void __iomem *base_addr;
+
+/*
+ * A few low level functions.
+ */
+
+static inline void s3c2410_ts_connect(void)
+{
+ s3c2410_gpio_cfgpin(S3C2410_GPG12, S3C2410_GPG12_XMON);
+ s3c2410_gpio_cfgpin(S3C2410_GPG13, S3C2410_GPG13_nXPON);
+ s3c2410_gpio_cfgpin(S3C2410_GPG14, S3C2410_GPG14_YMON);
+ s3c2410_gpio_cfgpin(S3C2410_GPG15, S3C2410_GPG15_nYPON);
+}
+
+static void s3c2410_ts_start_adc_conversion(void)
+{
+ writel(S3C2410_ADCTSC_PULL_UP_DISABLE | AUTOPST,
+ base_addr + S3C2410_ADCTSC);
+ writel(readl(base_addr + S3C2410_ADCCON) | S3C2410_ADCCON_ENABLE_START,
+ base_addr + S3C2410_ADCCON);
+}
+
+/*
+ * Just send the input events.
+ */
+
+enum ts_input_event {IE_DOWN = 0, IE_UP};
+
+static void ts_input_report(int event, int coords[])
+{
+#ifdef CONFIG_TOUCHSCREEN_S3C2410_DEBUG
+ static char *s[] = {"down", "up"};
+ struct timeval tv;
+
+ do_gettimeofday(&tv);
+#endif
+
+ if (event == IE_DOWN) {
+ input_report_abs(ts.dev, ABS_X, coords[0]);
+ input_report_abs(ts.dev, ABS_Y, coords[1]);
+ input_report_key(ts.dev, BTN_TOUCH, 1);
+ input_report_abs(ts.dev, ABS_PRESSURE, 1);
+
+#ifdef CONFIG_TOUCHSCREEN_S3C2410_DEBUG
+ printk(DEBUG_LVL "T:%06d %6s (X:%03d, Y:%03d)\n",
+ (int)tv.tv_usec, s[event], coords[0], coords[1]);
+#endif
+ } else {
+ input_report_key(ts.dev, BTN_TOUCH, 0);
+ input_report_abs(ts.dev, ABS_PRESSURE, 0);
+
+#ifdef CONFIG_TOUCHSCREEN_S3C2410_DEBUG
+ printk(DEBUG_LVL "T:%06d %6s\n",
+ (int)tv.tv_usec, s[event]);
+#endif
+ }
+
+ input_sync(ts.dev);
+}
+
+/*
+ * Manage the state of the touchscreen.
+ */
+
+static void event_send_timer_f(unsigned long data);
+
+static struct timer_list event_send_timer =
+ TIMER_INITIALIZER(event_send_timer_f, 0, 0);
+
+static void event_send_timer_f(unsigned long data)
+{
+ static int noop_counter;
+ int event_type;
+
+ while (__kfifo_get(ts.event_fifo, (unsigned char *)&event_type,
+ sizeof(int))) {
+ int buf[2];
+
+ switch (event_type) {
+ case 'D':
+ if (ts.state == TS_STATE_RELEASE_PENDING)
+ /* Ignore short UP event */
+ ts.state = TS_STATE_PRESSED;
+ break;
+
+ case 'U':
+ ts.state = TS_STATE_RELEASE_PENDING;
+ break;
+
+ case 'P':
+ if (ts.is_down) /* stylus_action needs a conversion */
+ s3c2410_ts_start_adc_conversion();
+
+ if (unlikely(__kfifo_get(ts.event_fifo,
+ (unsigned char *)buf,
+ sizeof(int) * 2)
+ != sizeof(int) * 2))
+ goto ts_exit_error;
+
+ ts_input_report(IE_DOWN, buf);
+ ts.state = TS_STATE_PRESSED;
+ break;
+
+ default:
+ goto ts_exit_error;
+ }
+
+ noop_counter = 0;
+ }
+
+ if (noop_counter++ >= 1) {
+ noop_counter = 0;
+ if (ts.state == TS_STATE_RELEASE_PENDING) {
+ /*
+ * We delay the UP event for a while to avoid jitter.
+ * If we get a DOWN event we do not send it.
+ */
+ ts_input_report(IE_UP, NULL);
+ ts.state = TS_STATE_STANDBY;
+
+ ts_filter_chain_clear(ts.chain);
+ }
+ } else {
+ mod_timer(&event_send_timer, jiffies + TS_RELEASE_TIMEOUT);
+ }
+
+ return;
+
+ts_exit_error: /* should not happen unless we have a bug */
+ printk(KERN_ERR __FILE__ ": event_send_timer_f failed\n");
+}
+
+/*
+ * Manage interrupts.
+ */
+
+static irqreturn_t stylus_updown(int irq, void *dev_id)
+{
+ unsigned long data0;
+ unsigned long data1;
+ int event_type;
+
+ data0 = readl(base_addr+S3C2410_ADCDAT0);
+ data1 = readl(base_addr+S3C2410_ADCDAT1);
+
+ ts.is_down = (!(data0 & S3C2410_ADCDAT0_UPDOWN)) &&
+ (!(data1 & S3C2410_ADCDAT0_UPDOWN));
+
+ event_type = ts.is_down ? 'D' : 'U';
+
+ if (unlikely(__kfifo_put(ts.event_fifo, (unsigned char *)&event_type,
+ sizeof(int)) != sizeof(int))) /* should not happen */
+ printk(KERN_ERR __FILE__": stylus_updown lost event!\n");
+
+ if (ts.is_down)
+ s3c2410_ts_start_adc_conversion();
+ else
+ writel(WAIT4INT(0), base_addr+S3C2410_ADCTSC);
+
+ mod_timer(&event_send_timer, jiffies + 1);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t stylus_action(int irq, void *dev_id)
+{
+ int buf[3];
+
+ /* Grab the ADC results. */
+ buf[1] = readl(base_addr + S3C2410_ADCDAT0) &
+ S3C2410_ADCDAT0_XPDATA_MASK;
+ buf[2] = readl(base_addr + S3C2410_ADCDAT1) &
+ S3C2410_ADCDAT1_YPDATA_MASK;
+
+ switch (ts_filter_chain_feed(ts.chain, &buf[1])) {
+ case 0:
+ /* The filter wants more points. */
+ s3c2410_ts_start_adc_conversion();
+ return IRQ_HANDLED;
+ case 1:
+ /* We have a point from the filters or no filtering enabled. */
+ buf[0] = 'P';
+ break;
+ default:
+ printk(KERN_ERR __FILE__
+ ":%d Invalid ts_filter_chain_feed return value.\n",
+ __LINE__);
+ case -1:
+ /* Error. Ignore the event. */
+ ts_filter_chain_clear(ts.chain);
+ writel(WAIT4INT(1), base_addr + S3C2410_ADCTSC);
+ return IRQ_HANDLED;
+ };
+
+ if (unlikely(__kfifo_put(ts.event_fifo, (unsigned char *)buf,
+ sizeof(int) * 3) != sizeof(int) * 3))
+ printk(KERN_ERR __FILE__":stylus_action bug.\n");
+
+ writel(WAIT4INT(1), base_addr + S3C2410_ADCTSC);
+ mod_timer(&event_send_timer, jiffies + 1);
+
+ return IRQ_HANDLED;
+}
+
+static struct clk *adc_clock;
+
+/*
+ * The functions for inserting/removing us as a module.
+ */
+
+static int __init s3c2410ts_probe(struct platform_device *pdev)
+{
+ int rc;
+ struct s3c2410_ts_mach_info *info;
+ struct input_dev *input_dev;
+ int ret = 0;
+
+ dev_info(&pdev->dev, "Starting\n");
+
+ info = (struct s3c2410_ts_mach_info *)pdev->dev.platform_data;
+
+ if (!info)
+ {
+ dev_err(&pdev->dev, "Hm... too bad: no platform data for ts\n");
+ return -EINVAL;
+ }
+
+#ifdef CONFIG_TOUCHSCREEN_S3C2410_DEBUG
+ printk(DEBUG_LVL "Entering s3c2410ts_init\n");
+#endif
+
+ adc_clock = clk_get(NULL, "adc");
+ if (!adc_clock) {
+ dev_err(&pdev->dev, "failed to get adc clock source\n");
+ return -ENOENT;
+ }
+ clk_enable(adc_clock);
+
+#ifdef CONFIG_TOUCHSCREEN_S3C2410_DEBUG
+ printk(DEBUG_LVL "got and enabled clock\n");
+#endif
+
+ base_addr = ioremap(S3C2410_PA_ADC,0x20);
+ if (base_addr == NULL) {
+ dev_err(&pdev->dev, "Failed to remap register block\n");
+ ret = -ENOMEM;
+ goto bail0;
+ }
+
+
+ /* If we acutally are a S3C2410: Configure GPIOs */
+ if (!strcmp(pdev->name, "s3c2410-ts"))
+ s3c2410_ts_connect();
+
+ if ((info->presc & 0xff) > 0)
+ writel(S3C2410_ADCCON_PRSCEN |
+ S3C2410_ADCCON_PRSCVL(info->presc&0xFF),
+ base_addr + S3C2410_ADCCON);
+ else
+ writel(0, base_addr+S3C2410_ADCCON);
+
+ /* Initialise registers */
+ if ((info->delay & 0xffff) > 0)
+ writel(info->delay & 0xffff, base_addr + S3C2410_ADCDLY);
+
+ writel(WAIT4INT(0), base_addr + S3C2410_ADCTSC);
+
+ /* Initialise input stuff */
+ memset(&ts, 0, sizeof(struct s3c2410ts));
+ input_dev = input_allocate_device();
+
+ if (!input_dev) {
+ dev_err(&pdev->dev, "Unable to allocate the input device\n");
+ ret = -ENOMEM;
+ goto bail1;
+ }
+
+ ts.dev = input_dev;
+ ts.dev->evbit[0] = BIT_MASK(EV_SYN) | BIT_MASK(EV_KEY) |
+ BIT_MASK(EV_ABS);
+ ts.dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
+ input_set_abs_params(ts.dev, ABS_X, 0, 0x3FF, 0, 0);
+ input_set_abs_params(ts.dev, ABS_Y, 0, 0x3FF, 0, 0);
+ input_set_abs_params(ts.dev, ABS_PRESSURE, 0, 1, 0, 0);
+
+ ts.dev->name = s3c2410ts_name;
+ ts.dev->id.bustype = BUS_RS232;
+ ts.dev->id.vendor = 0xDEAD;
+ ts.dev->id.product = 0xBEEF;
+ ts.dev->id.version = S3C2410TSVERSION;
+ ts.state = TS_STATE_STANDBY;
+ ts.event_fifo = kfifo_alloc(TS_EVENT_FIFO_SIZE, GFP_KERNEL, NULL);
+ if (IS_ERR(ts.event_fifo)) {
+ ret = -EIO;
+ goto bail2;
+ }
+
+ /* create the filter chain set up for the 2 coordinates we produce */
+ ts.chain = ts_filter_chain_create(pdev, info->filter_config, 2);
+
+ if (IS_ERR(ts.chain))
+ goto bail2;
+
+ ts_filter_chain_clear(ts.chain);
+
+ /* Get irqs */
+ if (request_irq(IRQ_ADC, stylus_action, IRQF_SAMPLE_RANDOM,
+ "s3c2410_action", ts.dev)) {
+ dev_err(&pdev->dev, "Could not allocate ts IRQ_ADC !\n");
+ iounmap(base_addr);
+ ret = -EIO;
+ goto bail3;
+ }
+ if (request_irq(IRQ_TC, stylus_updown, IRQF_SAMPLE_RANDOM,
+ "s3c2410_action", ts.dev)) {
+ dev_err(&pdev->dev, "Could not allocate ts IRQ_TC !\n");
+ free_irq(IRQ_ADC, ts.dev);
+ iounmap(base_addr);
+ ret = -EIO;
+ goto bail4;
+ }
+
+ dev_info(&pdev->dev, "Successfully loaded\n");
+
+ /* All went ok, so register to the input system */
+ rc = input_register_device(ts.dev);
+ if (rc) {
+ ret = -EIO;
+ goto bail5;
+ }
+
+ return 0;
+
+bail5:
+ free_irq(IRQ_TC, ts.dev);
+ free_irq(IRQ_ADC, ts.dev);
+ clk_disable(adc_clock);
+ iounmap(base_addr);
+ disable_irq(IRQ_TC);
+bail4:
+ disable_irq(IRQ_ADC);
+bail3:
+ ts_filter_chain_destroy(ts.chain);
+ kfifo_free(ts.event_fifo);
+bail2:
+ input_unregister_device(ts.dev);
+bail1:
+ iounmap(base_addr);
+bail0:
+
+ return ret;
+}
+
+static int s3c2410ts_remove(struct platform_device *pdev)
+{
+ disable_irq(IRQ_ADC);
+ disable_irq(IRQ_TC);
+ free_irq(IRQ_TC,ts.dev);
+ free_irq(IRQ_ADC,ts.dev);
+
+ if (adc_clock) {
+ clk_disable(adc_clock);
+ clk_put(adc_clock);
+ adc_clock = NULL;
+ }
+
+ input_unregister_device(ts.dev);
+ iounmap(base_addr);
+
+ ts_filter_chain_destroy(ts.chain);
+
+ kfifo_free(ts.event_fifo);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int s3c2410ts_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ writel(TSC_SLEEP, base_addr+S3C2410_ADCTSC);
+ writel(readl(base_addr+S3C2410_ADCCON) | S3C2410_ADCCON_STDBM,
+ base_addr+S3C2410_ADCCON);
+
+ disable_irq(IRQ_ADC);
+ disable_irq(IRQ_TC);
+
+ clk_disable(adc_clock);
+
+ return 0;
+}
+
+static int s3c2410ts_resume(struct platform_device *pdev)
+{
+ struct s3c2410_ts_mach_info *info =
+ ( struct s3c2410_ts_mach_info *)pdev->dev.platform_data;
+
+ clk_enable(adc_clock);
+ mdelay(1);
+
+ ts_filter_chain_clear(ts.chain);
+
+ enable_irq(IRQ_ADC);
+ enable_irq(IRQ_TC);
+
+ if ((info->presc&0xff) > 0)
+ writel(S3C2410_ADCCON_PRSCEN |
+ S3C2410_ADCCON_PRSCVL(info->presc&0xFF),
+ base_addr+S3C2410_ADCCON);
+ else
+ writel(0,base_addr+S3C2410_ADCCON);
+
+ /* Initialise registers */
+ if ((info->delay & 0xffff) > 0)
+ writel(info->delay & 0xffff, base_addr+S3C2410_ADCDLY);
+
+ writel(WAIT4INT(0), base_addr+S3C2410_ADCTSC);
+
+ return 0;
+}
+
+#else
+#define s3c2410ts_suspend NULL
+#define s3c2410ts_resume NULL
+#endif
+
+static struct platform_driver s3c2410ts_driver = {
+ .driver = {
+ .name = "s3c2410-ts",
+ .owner = THIS_MODULE,
+ },
+ .probe = s3c2410ts_probe,
+ .remove = s3c2410ts_remove,
+ .suspend = s3c2410ts_suspend,
+ .resume = s3c2410ts_resume,
+
+};
+
+static struct platform_driver s3c2440ts_driver = {
+ .driver = {
+ .name = "s3c2440-ts",
+ .owner = THIS_MODULE,
+ },
+ .probe = s3c2410ts_probe,
+ .remove = s3c2410ts_remove,
+ .suspend = s3c2410ts_suspend,
+ .resume = s3c2410ts_resume,
+
+};
+
+static int __init s3c2410ts_init(void)
+{
+ int rc;
+
+ rc = platform_driver_register(&s3c2410ts_driver);
+ if (rc < 0)
+ return rc;
+
+ rc = platform_driver_register(&s3c2440ts_driver);
+ if (rc < 0)
+ platform_driver_unregister(&s3c2410ts_driver);
+
+ return rc;
+}
+
+static void __exit s3c2410ts_exit(void)
+{
+ platform_driver_unregister(&s3c2440ts_driver);
+ platform_driver_unregister(&s3c2410ts_driver);
+}
+
+module_init(s3c2410ts_init);
+module_exit(s3c2410ts_exit);
+
diff --git a/target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/ts_filter_chain.c b/target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/ts_filter_chain.c
new file mode 100644
index 0000000..e6bb382
--- /dev/null
+++ b/target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/ts_filter_chain.c
@@ -0,0 +1,183 @@
+/*
+ * 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
+ *
+ * Copyright (c) 2008,2009 Andy Green <andy@openmoko.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+
+#include <linux/touchscreen/ts_filter_chain.h>
+#include <linux/touchscreen/ts_filter.h>
+
+/*
+ * Tux, would you like the following function in /lib?
+ * It helps us avoid silly code.
+ */
+
+/**
+ * sptrlen - Count how many non-null pointers are in a pointer array
+ * @arr: The array of pointers
+ */
+static int sptrlen(const void *arr)
+{
+ /* All pointers have the same size. */
+ const int **p = (const int **)arr;
+ int len = 0;
+
+ while (*(p++))
+ len++;
+
+ return len;
+}
+
+
+struct ts_filter_chain {
+ /* All of the filters. */
+ struct ts_filter **arr;
+ /* Filters that can propagate values in the chain. */
+ struct ts_filter **pchain;
+ /* Length of the pchain array. */
+ int pchain_len;
+ /* FIXME: Add a spinlock and use it. */
+};
+
+struct ts_filter_chain *ts_filter_chain_create(
+ struct platform_device *pdev,
+ const struct ts_filter_chain_configuration conf[],
+ int count_coords)
+{
+ struct ts_filter_chain *c;
+ int count = 0;
+ int len;
+
+ BUG_ON((count_coords < 1));
+ BUG_ON(count_coords > MAX_TS_FILTER_COORDS);
+
+ c = kzalloc(sizeof(struct ts_filter_chain), GFP_KERNEL);
+ if (!c)
+ goto create_err_1;
+
+ len = (sptrlen(conf) + 1);
+ /* Memory for two null-terminated arrays of filters. */
+ c->arr = kzalloc(2 * sizeof(struct ts_filter *) * len, GFP_KERNEL);
+ if (!c->arr)
+ goto create_err_1;
+ c->pchain = c->arr + len;
+
+ while (conf->api) {
+ /* TODO: Can we get away with only sending pdev->dev? */
+ struct ts_filter *f =
+ (conf->api->create)(pdev, conf->config, count_coords);
+ if (!f) {
+ dev_info(&pdev->dev, "Filter %d creation failed\n",
+ count);
+ goto create_err_2;
+ }
+
+ f->api = conf->api;
+ c->arr[count++] = f;
+
+ if (f->api->haspoint && f->api->getpoint && f->api->process)
+ c->pchain[c->pchain_len++] = f;
+
+ conf++;
+ }
+
+ dev_info(&pdev->dev, "%d filter(s) initialized\n", count);
+
+ return c;
+
+create_err_2:
+ ts_filter_chain_destroy(c); /* Also frees c. */
+create_err_1:
+ dev_info(&pdev->dev, "Error in filter chain initialization\n");
+ /*
+ * FIXME: Individual filters have to return errors this way.
+ * We only have to forward the errors we find.
+ */
+ return ERR_PTR(-ENOMEM);
+}
+EXPORT_SYMBOL_GPL(ts_filter_chain_create);
+
+void ts_filter_chain_destroy(struct ts_filter_chain *c)
+{
+ if (c->arr) {
+ struct ts_filter **a = c->arr;
+ while (*a) {
+ ((*a)->api->destroy)(*a);
+ a++;
+ }
+ kfree(c->arr);
+ }
+ kfree(c);
+}
+EXPORT_SYMBOL_GPL(ts_filter_chain_destroy);
+
+void ts_filter_chain_clear(struct ts_filter_chain *c)
+{
+ struct ts_filter **a = c->arr;
+
+ while (*a) {
+ if ((*a)->api->clear)
+ ((*a)->api->clear)(*a);
+ a++;
+ }
+}
+EXPORT_SYMBOL_GPL(ts_filter_chain_clear);
+
+static void ts_filter_chain_scale(struct ts_filter_chain *c, int *coords)
+{
+ struct ts_filter **a = c->arr;
+ while (*a) {
+ if ((*a)->api->scale)
+ ((*a)->api->scale)(*a, coords);
+ a++;
+ }
+}
+
+int ts_filter_chain_feed(struct ts_filter_chain *c, int *coords)
+{
+ int len = c->pchain_len;
+ int i = len - 1;
+
+ if (!c->pchain[0])
+ return 1; /* Nothing to do. */
+
+ BUG_ON(c->pchain[0]->api->haspoint(c->pchain[0]));
+
+ if (c->pchain[0]->api->process(c->pchain[0], coords))
+ return -1;
+
+ while (i >= 0 && i < len) {
+ if (c->pchain[i]->api->haspoint(c->pchain[i])) {
+ c->pchain[i]->api->getpoint(c->pchain[i], coords);
+ if (++i < len &&
+ c->pchain[i]->api->process(c->pchain[i], coords))
+ return -1; /* Error. */
+ } else {
+ i--;
+ }
+ }
+
+ if (i >= 0) { /* Same as i == len. */
+ ts_filter_chain_scale(c, coords);
+ return 1;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ts_filter_chain_feed);
+
diff --git a/target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/ts_filter_group.c b/target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/ts_filter_group.c
new file mode 100644
index 0000000..f53f16d
--- /dev/null
+++ b/target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/ts_filter_group.c
@@ -0,0 +1,296 @@
+/*
+ * 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
+ *
+ * Copyright (C) 2008,2009 by Openmoko, Inc.
+ * Author: Nelson Castillo <arhuaco@freaks-unidos.net>
+ * All rights reserved.
+ *
+ *
+ * This filter is useful to reject samples that are not reliable. We consider
+ * that a sample is not reliable if it deviates form the Majority.
+ *
+ * 1) We collect S samples.
+ *
+ * 2) For each dimension:
+ *
+ * - We sort the points.
+ * - Points that are "close enough" are considered to be in the same set.
+ * - We choose the set with more elements. If more than "threshold"
+ * points are in this set we use the first and the last point of the set
+ * to define the valid range for this dimension [min, max], otherwise we
+ * discard all the points and go to step 1.
+ *
+ * 3) We consider the unsorted S samples and try to feed them to the next
+ * filter in the chain. If one of the points of each sample
+ * is not in the allowed range for its dimension, we discard the sample.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/sort.h>
+#include <linux/touchscreen/ts_filter_group.h>
+
+struct ts_filter_group {
+ /* Private filter configuration. */
+ struct ts_filter_group_configuration *config;
+ /* Filter API. */
+ struct ts_filter tsf;
+
+ int N; /* How many samples we have. */
+ int *samples[MAX_TS_FILTER_COORDS]; /* The samples: our input. */
+
+ int *group_size; /* Used for temporal computations. */
+ int *sorted_samples; /* Used for temporal computations. */
+
+ int range_max[MAX_TS_FILTER_COORDS]; /* Max. computed ranges. */
+ int range_min[MAX_TS_FILTER_COORDS]; /* Min. computed ranges. */
+
+ int tries_left; /* We finish if we don't get enough samples. */
+ int ready; /* If we are ready to deliver samples. */
+ int result; /* Index of the point being returned. */
+};
+
+#define ts_filter_to_filter_group(f) \
+ container_of(f, struct ts_filter_group, tsf)
+
+
+static void ts_filter_group_clear_internal(struct ts_filter_group *tsfg,
+ int attempts)
+{
+ tsfg->N = 0;
+ tsfg->tries_left = attempts;
+ tsfg->ready = 0;
+ tsfg->result = 0;
+}
+
+static void ts_filter_group_clear(struct ts_filter *tsf)
+{
+ struct ts_filter_group *tsfg = ts_filter_to_filter_group(tsf);
+
+ ts_filter_group_clear_internal(tsfg, tsfg->config->attempts);
+}
+
+static struct ts_filter *ts_filter_group_create(
+ struct platform_device *pdev,
+ const struct ts_filter_configuration *conf,
+ int count_coords)
+{
+ struct ts_filter_group *tsfg;
+ int i;
+
+ tsfg = kzalloc(sizeof(struct ts_filter_group), GFP_KERNEL);
+ if (!tsfg)
+ return NULL;
+
+ tsfg->config = container_of(conf,
+ struct ts_filter_group_configuration,
+ config);
+ tsfg->tsf.count_coords = count_coords;
+
+ BUG_ON(tsfg->config->attempts <= 0);
+
+ tsfg->samples[0] = kmalloc((2 + count_coords) * sizeof(int) *
+ tsfg->config->length, GFP_KERNEL);
+ if (!tsfg->samples[0]) {
+ kfree(tsfg);
+ return NULL;
+ }
+ for (i = 1; i < count_coords; ++i)
+ tsfg->samples[i] = tsfg->samples[0] + i * tsfg->config->length;
+ tsfg->sorted_samples = tsfg->samples[0] + count_coords *
+ tsfg->config->length;
+ tsfg->group_size = tsfg->samples[0] + (1 + count_coords) *
+ tsfg->config->length;
+
+ ts_filter_group_clear_internal(tsfg, tsfg->config->attempts);
+
+ dev_info(&pdev->dev, "Created Group filter len:%d coords:%d close:%d "
+ "thresh:%d\n", tsfg->config->length, count_coords,
+ tsfg->config->close_enough, tsfg->config->threshold);
+
+ return &tsfg->tsf;
+}
+
+static void ts_filter_group_destroy(struct ts_filter *tsf)
+{
+ struct ts_filter_group *tsfg = ts_filter_to_filter_group(tsf);
+
+ kfree(tsfg->samples[0]); /* first guy has pointer from kmalloc */
+ kfree(tsf);
+}
+
+static int int_cmp(const void *_a, const void *_b)
+{
+ const int *a = _a;
+ const int *b = _b;
+
+ if (*a > *b)
+ return 1;
+ if (*a < *b)
+ return -1;
+ return 0;
+}
+
+static void ts_filter_group_prepare_next(struct ts_filter *tsf);
+
+static int ts_filter_group_process(struct ts_filter *tsf, int *coords)
+{
+ struct ts_filter_group *tsfg = ts_filter_to_filter_group(tsf);
+ int n;
+ int i;
+
+ BUG_ON(tsfg->N >= tsfg->config->length);
+ BUG_ON(tsfg->ready);
+
+ for (n = 0; n < tsf->count_coords; n++)
+ tsfg->samples[n][tsfg->N] = coords[n];
+
+ if (++tsfg->N < tsfg->config->length)
+ return 0; /* We need more samples. */
+
+ for (n = 0; n < tsfg->tsf.count_coords; n++) {
+ int *v = tsfg->sorted_samples;
+ int ngroups = 0;
+ int best_size;
+ int best_idx = 0;
+ int idx = 0;
+
+ memcpy(v, tsfg->samples[n], tsfg->N * sizeof(int));
+ /*
+ * FIXME: Remove this sort call. We already have the
+ * algorithm for this modification. The filter will
+ * need less points (about half) if there is not a
+ * lot of noise. Right now we are doing a constant
+ * amount of work no matter how much noise we are
+ * dealing with.
+ */
+ sort(v, tsfg->N, sizeof(int), int_cmp, NULL);
+
+ tsfg->group_size[0] = 1;
+ for (i = 1; i < tsfg->N; ++i) {
+ if (v[i] - v[i - 1] <= tsfg->config->close_enough)
+ tsfg->group_size[ngroups]++;
+ else
+ tsfg->group_size[++ngroups] = 1;
+ }
+ ngroups++;
+
+ best_size = tsfg->group_size[0];
+ for (i = 1; i < ngroups; i++) {
+ idx += tsfg->group_size[i - 1];
+ if (best_size < tsfg->group_size[i]) {
+ best_size = tsfg->group_size[i];
+ best_idx = idx;
+ }
+ }
+
+ if (best_size < tsfg->config->threshold) {
+ /* This set is not good enough for us. */
+ if (--tsfg->tries_left) {
+ ts_filter_group_clear_internal
+ (tsfg, tsfg->tries_left);
+ /* No errors but we need more samples. */
+ return 0;
+ }
+ return 1; /* We give up: error. */
+ }
+
+ tsfg->range_min[n] = v[best_idx];
+ tsfg->range_max[n] = v[best_idx + best_size - 1];
+ }
+
+ ts_filter_group_prepare_next(tsf);
+
+ return 0;
+}
+
+/*
+ * This private function prepares a point that will be returned
+ * in ts_filter_group_getpoint if it is available. It updates
+ * the priv->ready state also.
+ */
+static void ts_filter_group_prepare_next(struct ts_filter *tsf)
+{
+ struct ts_filter_group *priv = ts_filter_to_filter_group(tsf);
+ int n;
+
+ while (priv->result < priv->N) {
+ for (n = 0; n < priv->tsf.count_coords; ++n) {
+ if (priv->samples[n][priv->result] <
+ priv->range_min[n] ||
+ priv->samples[n][priv->result] > priv->range_max[n])
+ break;
+ }
+
+ if (n == priv->tsf.count_coords) /* Sample is OK. */
+ break;
+
+ priv->result++;
+ }
+
+ if (unlikely(priv->result >= priv->N)) { /* No sample to deliver. */
+ ts_filter_group_clear_internal(priv, priv->config->attempts);
+ priv->ready = 0;
+ } else {
+ priv->ready = 1;
+ }
+}
+
+static int ts_filter_group_haspoint(struct ts_filter *tsf)
+{
+ struct ts_filter_group *priv = ts_filter_to_filter_group(tsf);
+
+ return priv->ready;
+}
+
+static void ts_filter_group_getpoint(struct ts_filter *tsf, int *point)
+{
+ struct ts_filter_group *priv = ts_filter_to_filter_group(tsf);
+ int n;
+
+ BUG_ON(!priv->ready);
+
+ for (n = 0; n < priv->tsf.count_coords; n++)
+ point[n] = priv->samples[n][priv->result];
+
+ priv->result++;
+
+ /* This call will update priv->ready. */
+ ts_filter_group_prepare_next(tsf);
+}
+
+/*
+ * Get ready to process the next batch of points, forget
+ * points we could have delivered.
+ */
+static void ts_filter_group_scale(struct ts_filter *tsf, int *coords)
+{
+ struct ts_filter_group *priv = ts_filter_to_filter_group(tsf);
+
+ ts_filter_group_clear_internal(priv, priv->config->attempts);
+}
+
+const struct ts_filter_api ts_filter_group_api = {
+ .create = ts_filter_group_create,
+ .destroy = ts_filter_group_destroy,
+ .clear = ts_filter_group_clear,
+ .process = ts_filter_group_process,
+ .haspoint = ts_filter_group_haspoint,
+ .getpoint = ts_filter_group_getpoint,
+ .scale = ts_filter_group_scale,
+};
+EXPORT_SYMBOL_GPL(ts_filter_group_api);
+
diff --git a/target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/ts_filter_linear.c b/target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/ts_filter_linear.c
new file mode 100644
index 0000000..0a595c5
--- /dev/null
+++ b/target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/ts_filter_linear.c
@@ -0,0 +1,212 @@
+/*
+ * 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; 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
+ *
+ * Copyright (C) 2008,2009 by Openmoko, Inc.
+ * Author: Nelson Castillo <arhuaco@freaks-unidos.net>
+ * All rights reserved.
+ *
+ * Linearly scale touchscreen values.
+ *
+ * Expose the TS_FILTER_LINEAR_NCONSTANTS for the linear transformation
+ * using sysfs.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+
+#include <linux/touchscreen/ts_filter_linear.h>
+
+struct ts_filter_linear;
+
+/* Sysfs code. */
+
+struct const_obj {
+ /* The actual private object. */
+ struct ts_filter_linear *tsfl;
+ /* Our kobject. */
+ struct kobject kobj;
+};
+
+#define to_const_obj(x) container_of(x, struct const_obj, kobj)
+
+struct const_attribute {
+ struct attribute attr;
+ ssize_t (*show)(struct const_obj *const, struct const_attribute *attr,
+ char *buf);
+ ssize_t (*store)(struct const_obj *const, struct const_attribute *attr,
+ const char *buf, size_t count);
+};
+
+#define to_const_attr(x) container_of(x, struct const_attribute, attr)
+
+
+/* Private linear filter structure. */
+
+struct ts_filter_linear {
+ /* Private configuration for this filter. */
+ struct ts_filter_linear_configuration *config;
+
+ /* Generic filter API. */
+ struct ts_filter tsf;
+
+ /* Linear constants for the transformation. */
+ int constants[TS_FILTER_LINEAR_NCONSTANTS];
+
+ /* Sysfs. */
+
+ /* Our const_object. */
+ struct const_obj c_obj;
+ /* Our type. We will stick operations to it. */
+ struct kobj_type const_ktype;
+ /* Attrs. of the virtual files. */
+ struct const_attribute kattrs[TS_FILTER_LINEAR_NCONSTANTS];
+ /* Default Attrs. Always NULL for us. */
+ struct attribute *attrs[TS_FILTER_LINEAR_NCONSTANTS + 1];
+ /* Storage for the name of the virtual files. */
+ char attr_names[TS_FILTER_LINEAR_NCONSTANTS][2];
+};
+
+#define ts_filter_to_filter_linear(f) \
+ container_of(f, struct ts_filter_linear, tsf)
+
+/* Sysfs functions. */
+
+static ssize_t const_attr_show(struct kobject *kobj,
+ struct attribute *attr,
+ char *buf)
+{
+ struct const_attribute *a = to_const_attr(attr);
+
+ return a->show(to_const_obj(kobj), a, buf);
+}
+
+static ssize_t const_attr_store(struct kobject *kobj,
+ struct attribute *attr,
+ const char *buf, size_t len)
+{
+ struct const_attribute *a = to_const_attr(attr);
+
+ return a->store(to_const_obj(kobj), a, buf, len);
+}
+
+static struct sysfs_ops const_sysfs_ops = {
+ .show = const_attr_show,
+ .store = const_attr_store,
+};
+
+static void const_release(struct kobject *kobj)
+{
+ kfree(to_const_obj(kobj)->tsfl);
+}
+
+static ssize_t const_show(struct const_obj *obj, struct const_attribute *attr,
+ char *buf)
+{
+ int who;
+
+ sscanf(attr->attr.name, "%d", &who);
+ return sprintf(buf, "%d\n", obj->tsfl->constants[who]);
+}
+
+static ssize_t const_store(struct const_obj *obj, struct const_attribute *attr,
+ const char *buf, size_t count)
+{
+ int who;
+
+ sscanf(attr->attr.name, "%d", &who);
+ sscanf(buf, "%d", &obj->tsfl->constants[who]);
+ return count;
+}
+
+/* Filter functions. */
+
+static struct ts_filter *ts_filter_linear_create(
+ struct platform_device *pdev,
+ const struct ts_filter_configuration *conf,
+ int count_coords)
+{
+ struct ts_filter_linear *tsfl;
+ int i;
+ int ret;
+
+ tsfl = kzalloc(sizeof(struct ts_filter_linear), GFP_KERNEL);
+ if (!tsfl)
+ return NULL;
+
+ tsfl->config = container_of(conf,
+ struct ts_filter_linear_configuration,
+ config);
+
+ tsfl->tsf.count_coords = count_coords;
+
+ for (i = 0; i < TS_FILTER_LINEAR_NCONSTANTS; ++i) {
+ tsfl->constants[i] = tsfl->config->constants[i];
+
+ /* sysfs */
+ sprintf(tsfl->attr_names[i], "%d", i);
+ tsfl->kattrs[i].attr.name = tsfl->attr_names[i];
+ tsfl->kattrs[i].attr.mode = 0666;
+ tsfl->kattrs[i].show = const_show;
+ tsfl->kattrs[i].store = const_store;
+ tsfl->attrs[i] = &tsfl->kattrs[i].attr;
+ }
+ tsfl->attrs[i] = NULL;
+
+ tsfl->const_ktype.sysfs_ops = &const_sysfs_ops;
+ tsfl->const_ktype.release = const_release;
+ tsfl->const_ktype.default_attrs = tsfl->attrs;
+ tsfl->c_obj.tsfl = tsfl; /* kernel frees tsfl in const_release */
+
+ ret = kobject_init_and_add(&tsfl->c_obj.kobj, &tsfl->const_ktype,
+ &pdev->dev.kobj, "calibration");
+ if (ret) {
+ kobject_put(&tsfl->c_obj.kobj);
+ return NULL;
+ }
+
+ dev_info(&pdev->dev, "Created Linear filter coords:%d\n", count_coords);
+
+ return &tsfl->tsf;
+}
+
+static void ts_filter_linear_destroy(struct ts_filter *tsf)
+{
+ struct ts_filter_linear *tsfl = ts_filter_to_filter_linear(tsf);
+
+ /* Kernel frees tsfl in const_release. */
+ kobject_put(&tsfl->c_obj.kobj);
+}
+
+static void ts_filter_linear_scale(struct ts_filter *tsf, int *coords)
+{
+ struct ts_filter_linear *tsfl = ts_filter_to_filter_linear(tsf);
+
+ int *k = tsfl->constants;
+ int c0 = coords[tsfl->config->coord0];
+ int c1 = coords[tsfl->config->coord1];
+
+ coords[tsfl->config->coord0] = (k[2] + k[0] * c0 + k[1] * c1) / k[6];
+ coords[tsfl->config->coord1] = (k[5] + k[3] * c0 + k[4] * c1) / k[6];
+}
+
+const struct ts_filter_api ts_filter_linear_api = {
+ .create = ts_filter_linear_create,
+ .destroy = ts_filter_linear_destroy,
+ .scale = ts_filter_linear_scale,
+};
+EXPORT_SYMBOL_GPL(ts_filter_linear_api);
+
diff --git a/target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/ts_filter_mean.c b/target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/ts_filter_mean.c
new file mode 100644
index 0000000..8b85f67
--- /dev/null
+++ b/target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/ts_filter_mean.c
@@ -0,0 +1,174 @@
+/*
+ * 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
+ *
+ * Copyright (c) 2008,2009
+ * Andy Green <andy@openmoko.com>
+ * Nelson Castillo <arhuaco@freaks-unidos.net>
+ *
+ * Simple mean filter.
+ *
+ */
+
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+
+#include <linux/touchscreen/ts_filter_mean.h>
+
+struct ts_filter_mean {
+ /* Copy of the private filter configuration. */
+ struct ts_filter_mean_configuration *config;
+ /* Filter API. */
+ struct ts_filter tsf;
+
+ /* Index on a circular buffer. */
+ int curr;
+ /* Useful to tell if the circular buffer is full(read:ready). */
+ int count;
+ /* Sumation used to compute the mean. */
+ int sum[MAX_TS_FILTER_COORDS];
+ /* Keep point values and decrement them from the sum on time. */
+ int *fifo[MAX_TS_FILTER_COORDS];
+ /* Store the output of this filter. */
+ int ready;
+};
+
+#define ts_filter_to_filter_mean(f) container_of(f, struct ts_filter_mean, tsf)
+
+
+static void ts_filter_mean_clear(struct ts_filter *tsf);
+
+static struct ts_filter *ts_filter_mean_create(
+ struct platform_device *pdev,
+ const struct ts_filter_configuration *conf,
+ int count_coords)
+{
+ struct ts_filter_mean *priv;
+ int *v;
+ int n;
+
+ priv = kzalloc(sizeof(struct ts_filter_mean), GFP_KERNEL);
+ if (!priv)
+ return NULL;
+
+ priv->tsf.count_coords = count_coords;
+ priv->config = container_of(conf,
+ struct ts_filter_mean_configuration,
+ config);
+
+ BUG_ON(priv->config->length <= 0);
+
+ v = kmalloc(priv->config->length * sizeof(int) * count_coords,
+ GFP_KERNEL);
+ if (!v)
+ return NULL;
+
+ for (n = 0; n < count_coords; n++) {
+ priv->fifo[n] = v;
+ v += priv->config->length;
+ }
+
+ ts_filter_mean_clear(&priv->tsf);
+
+ dev_info(&pdev->dev, "Created Mean filter len:%d coords:%d\n",
+ priv->config->length, count_coords);
+
+ return &priv->tsf;
+}
+
+static void ts_filter_mean_destroy(struct ts_filter *tsf)
+{
+ struct ts_filter_mean *priv = ts_filter_to_filter_mean(tsf);
+
+ kfree(priv->fifo[0]); /* first guy has pointer from kmalloc */
+ kfree(tsf);
+}
+
+static void ts_filter_mean_clear(struct ts_filter *tsf)
+{
+ struct ts_filter_mean *priv = ts_filter_to_filter_mean(tsf);
+
+ priv->count = 0;
+ priv->curr = 0;
+ priv->ready = 0;
+ memset(priv->sum, 0, tsf->count_coords * sizeof(int));
+}
+
+static int ts_filter_mean_process(struct ts_filter *tsf, int *coords)
+{
+ struct ts_filter_mean *priv = ts_filter_to_filter_mean(tsf);
+ int n;
+
+ BUG_ON(priv->ready);
+
+ for (n = 0; n < tsf->count_coords; n++) {
+ priv->sum[n] += coords[n];
+ priv->fifo[n][priv->curr] = coords[n];
+ }
+
+ if (priv->count + 1 == priv->config->length)
+ priv->ready = 1;
+ else
+ priv->count++;
+
+ priv->curr = (priv->curr + 1) % priv->config->length;
+
+ return 0; /* No error. */
+}
+
+static int ts_filter_mean_haspoint(struct ts_filter *tsf)
+{
+ struct ts_filter_mean *priv = ts_filter_to_filter_mean(tsf);
+
+ return priv->ready;
+}
+
+static void ts_filter_mean_getpoint(struct ts_filter *tsf, int *point)
+{
+ struct ts_filter_mean *priv = ts_filter_to_filter_mean(tsf);
+ int n;
+
+ BUG_ON(!priv->ready);
+
+ for (n = 0; n < tsf->count_coords; n++) {
+ point[n] = priv->sum[n];
+ priv->sum[n] -= priv->fifo[n][priv->curr];
+ }
+
+ priv->ready = 0;
+}
+
+static void ts_filter_mean_scale(struct ts_filter *tsf, int *coords)
+{
+ int n;
+ struct ts_filter_mean *priv = ts_filter_to_filter_mean(tsf);
+
+ for (n = 0; n < tsf->count_coords; n++) {
+ coords[n] += priv->config->length >> 1; /* Rounding. */
+ coords[n] /= priv->config->length;
+ }
+}
+
+const struct ts_filter_api ts_filter_mean_api = {
+ .create = ts_filter_mean_create,
+ .destroy = ts_filter_mean_destroy,
+ .clear = ts_filter_mean_clear,
+ .process = ts_filter_mean_process,
+ .scale = ts_filter_mean_scale,
+ .haspoint = ts_filter_mean_haspoint,
+ .getpoint = ts_filter_mean_getpoint,
+};
+EXPORT_SYMBOL_GPL(ts_filter_mean_api);
+
diff --git a/target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/ts_filter_median.c b/target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/ts_filter_median.c
new file mode 100644
index 0000000..4c230f1
--- /dev/null
+++ b/target/linux/s3c24xx/files-2.6.30/drivers/input/touchscreen/ts_filter_median.c
@@ -0,0 +1,261 @@
+/*
+ * 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
+ *
+ * Copyright (c) 2008 Andy Green <andy@openmoko.com>
+ *
+ *
+ * Median averaging stuff. We sort incoming raw samples into an array of
+ * MEDIAN_SIZE length, discarding the oldest sample each time once we are full.
+ * We then return the sum of the middle three samples for X and Y. It means
+ * the final result must be divided by (3 * scaling factor) to correct for
+ * avoiding the repeated /3.
+ *
+ * This strongly rejects brief excursions away from a central point that is
+ * sticky in time compared to the excursion duration.
+ *
+ * Thanks to Dale Schumacher (who wrote some example code) and Carl-Daniel
+ * Halifinger who pointed out this would be a good method.
+ */
+
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/touchscreen/ts_filter_median.h>
+
+struct ts_filter_median {
+ /* Private configuration. */
+ struct ts_filter_median_configuration *config;
+ /* Generic Filter API. */
+ struct ts_filter tsf;
+
+ /* Count raw samples we get. */
+ int samples_count;
+ /*
+ * Remember the last coordinates we got in order to know if
+ * we are moving slow or fast.
+ */
+ int last_issued[MAX_TS_FILTER_COORDS];
+ /* How many samples in the sort buffer are valid. */
+ int valid;
+ /* Samples taken for median in sorted form. */
+ int *sort[MAX_TS_FILTER_COORDS];
+ /* Samples taken for median. */
+ int *fifo[MAX_TS_FILTER_COORDS];
+ /* Where we are in the fifo sample memory. */
+ int pos;
+ /* Do we have a sample to deliver? */
+ int ready;
+};
+
+#define ts_filter_to_filter_median(f) \
+ container_of(f, struct ts_filter_median, tsf)
+
+
+static void ts_filter_median_insert(int *p, int sample, int count)
+{
+ int n;
+
+ /* Search through what we got so far to find where to put sample. */
+ for (n = 0; n < count; n++)
+ if (sample < p[n]) { /* We met somebody bigger than us? */
+ /* Starting from the end, push bigger guys down one. */
+ for (count--; count >= n; count--)
+ p[count + 1] = p[count];
+ p[n] = sample; /* Put us in place of first bigger. */
+ return;
+ }
+
+ p[count] = sample; /* Nobody was bigger than us, add us on the end. */
+}
+
+static void ts_filter_median_del(int *p, int value, int count)
+{
+ int index;
+
+ for (index = 0; index < count; index++)
+ if (p[index] == value) {
+ for (; index < count; index++)
+ p[index] = p[index + 1];
+ return;
+ }
+}
+
+
+static void ts_filter_median_clear(struct ts_filter *tsf)
+{
+ struct ts_filter_median *tsfm = ts_filter_to_filter_median(tsf);
+
+ tsfm->pos = 0;
+ tsfm->valid = 0;
+ tsfm->ready = 0;
+ memset(&tsfm->last_issued[0], 1, tsf->count_coords * sizeof(int));
+}
+
+static struct ts_filter *ts_filter_median_create(
+ struct platform_device *pdev,
+ const struct ts_filter_configuration *conf,
+ int count_coords)
+{
+ int *p;
+ int n;
+ struct ts_filter_median *tsfm = kzalloc(sizeof(struct ts_filter_median),
+ GFP_KERNEL);
+
+ if (!tsfm)
+ return NULL;
+
+ tsfm->config = container_of(conf,
+ struct ts_filter_median_configuration,
+ config);
+
+ tsfm->tsf.count_coords = count_coords;
+
+ tsfm->config->midpoint = (tsfm->config->extent >> 1) + 1;
+
+ p = kmalloc(2 * count_coords * sizeof(int) * (tsfm->config->extent + 1),
+ GFP_KERNEL);
+ if (!p) {
+ kfree(tsfm);
+ return NULL;
+ }
+
+ for (n = 0; n < count_coords; n++) {
+ tsfm->sort[n] = p;
+ p += tsfm->config->extent + 1;
+ tsfm->fifo[n] = p;
+ p += tsfm->config->extent + 1;
+ }
+
+ ts_filter_median_clear(&tsfm->tsf);
+
+ dev_info(&pdev->dev,
+ "Created Median filter len:%d coords:%d dec_threshold:%d\n",
+ tsfm->config->extent, count_coords,
+ tsfm->config->decimation_threshold);
+
+ return &tsfm->tsf;
+}
+
+static void ts_filter_median_destroy(struct ts_filter *tsf)
+{
+ struct ts_filter_median *tsfm = ts_filter_to_filter_median(tsf);
+
+ kfree(tsfm->sort[0]); /* First guy has pointer from kmalloc. */
+ kfree(tsf);
+}
+
+static void ts_filter_median_scale(struct ts_filter *tsf, int *coords)
+{
+ int n;
+
+ for (n = 0; n < tsf->count_coords; n++)
+ coords[n] = (coords[n] + 2) / 3;
+}
+
+/*
+ * Give us the raw sample data coords, and if we return 1 then you can
+ * get a filtered coordinate from coords. If we return 0 you didn't
+ * fill all the filters with samples yet.
+ */
+
+static int ts_filter_median_process(struct ts_filter *tsf, int *coords)
+{
+ struct ts_filter_median *tsfm = ts_filter_to_filter_median(tsf);
+ int n;
+ int movement = 1;
+
+ for (n = 0; n < tsf->count_coords; n++) {
+ /* Grab copy in insertion order to remove when oldest. */
+ tsfm->fifo[n][tsfm->pos] = coords[n];
+ /* Insert these samples in sorted order in the median arrays. */
+ ts_filter_median_insert(tsfm->sort[n], coords[n], tsfm->valid);
+ }
+ /* Move us on in the fifo. */
+ if (++tsfm->pos == (tsfm->config->extent + 1))
+ tsfm->pos = 0;
+
+ /* Have we finished a median sampling? */
+ if (++tsfm->valid < tsfm->config->extent)
+ goto process_exit; /* No valid sample to use. */
+
+ BUG_ON(tsfm->valid != tsfm->config->extent);
+
+ tsfm->valid--;
+
+ /*
+ * Sum the middle 3 in the median sorted arrays. We don't divide back
+ * down which increases the sum resolution by a factor of 3 until the
+ * scale API function is called.
+ */
+ for (n = 0; n < tsf->count_coords; n++)
+ /* Perform the deletion of the oldest sample. */
+ ts_filter_median_del(tsfm->sort[n], tsfm->fifo[n][tsfm->pos],
+ tsfm->valid);
+
+ tsfm->samples_count--;
+ if (tsfm->samples_count >= 0)
+ goto process_exit;
+
+ for (n = 0; n < tsf->count_coords; n++) {
+ /* Give the coordinate result from summing median 3. */
+ coords[n] = tsfm->sort[n][tsfm->config->midpoint - 1] +
+ tsfm->sort[n][tsfm->config->midpoint] +
+ tsfm->sort[n][tsfm->config->midpoint + 1];
+
+ movement += abs(tsfm->last_issued[n] - coords[n]);
+ }
+
+ if (movement > tsfm->config->decimation_threshold) /* Moving fast. */
+ tsfm->samples_count = tsfm->config->decimation_above;
+ else
+ tsfm->samples_count = tsfm->config->decimation_below;
+
+ memcpy(&tsfm->last_issued[0], coords, tsf->count_coords * sizeof(int));
+
+ tsfm->ready = 1;
+
+process_exit:
+ return 0;
+}
+
+static int ts_filter_median_haspoint(struct ts_filter *tsf)
+{
+ struct ts_filter_median *priv = ts_filter_to_filter_median(tsf);
+
+ return priv->ready;
+}
+
+static void ts_filter_median_getpoint(struct ts_filter *tsf, int *point)
+{
+ struct ts_filter_median *priv = ts_filter_to_filter_median(tsf);
+
+ BUG_ON(!priv->ready);
+
+ memcpy(point, &priv->last_issued[0], tsf->count_coords * sizeof(int));
+
+ priv->ready = 0;
+}
+
+const struct ts_filter_api ts_filter_median_api = {
+ .create = ts_filter_median_create,
+ .destroy = ts_filter_median_destroy,
+ .clear = ts_filter_median_clear,
+ .process = ts_filter_median_process,
+ .scale = ts_filter_median_scale,
+ .haspoint = ts_filter_median_haspoint,
+ .getpoint = ts_filter_median_getpoint,
+};
+EXPORT_SYMBOL_GPL(ts_filter_median_api);
+
--
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