From f5affd4f36d839d706b02f1ffb69e0cf70c4140c Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen 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 0000000000..0814d100ee --- /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 + * 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 +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#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 "); +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 0000000000..dc6602a8ea --- /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 + * converted to private bitbang by: + * Andy Green + * ability to set acceleration threshold added by: + * Simon Kagstrom + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +/* 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 "); +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 0000000000..f980bfcce4 --- /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 + * iPAQ H1940 touchscreen support + * + * ChangeLog + * + * 2004-09-05: Herbert Pötzl + * - added clock (de-)allocation code + * + * 2005-03-06: Arnaud Patard + * - 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 + * - Make use of some undocumented features of the touchscreen + * controller + * + * 2007-05-23: Harald Welte + * - Add proper support for S32440 + * + * 2008-06-23: Andy Green + * - removed averaging system + * - added generic Touchscreen filter stuff + * + * 2008-11-27: Nelson Castillo + * - improve interrupt handling + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#include + +/* 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 "); +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 0000000000..e6bb382700 --- /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 + */ + +#include +#include + +#include +#include + +/* + * 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 0000000000..f53f16dafd --- /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 + * 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 +#include +#include +#include + +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 0000000000..0a595c5992 --- /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 + * All rights reserved. + * + * Linearly scale touchscreen values. + * + * Expose the TS_FILTER_LINEAR_NCONSTANTS for the linear transformation + * using sysfs. + * + */ + +#include +#include +#include + +#include + +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 0000000000..8b85f676fe --- /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 + * Nelson Castillo + * + * Simple mean filter. + * + */ + +#include +#include +#include + +#include + +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 0000000000..4c230f174b --- /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 + * + * + * 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 +#include +#include +#include + +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); + -- cgit v1.2.3