diff options
Diffstat (limited to 'target/linux/s3c24xx/files-2.6.31/drivers/input/touchscreen/ts_filter_linear.c')
| -rw-r--r-- | target/linux/s3c24xx/files-2.6.31/drivers/input/touchscreen/ts_filter_linear.c | 212 |
1 files changed, 0 insertions, 212 deletions
diff --git a/target/linux/s3c24xx/files-2.6.31/drivers/input/touchscreen/ts_filter_linear.c b/target/linux/s3c24xx/files-2.6.31/drivers/input/touchscreen/ts_filter_linear.c deleted file mode 100644 index 0a595c5992..0000000000 --- a/target/linux/s3c24xx/files-2.6.31/drivers/input/touchscreen/ts_filter_linear.c +++ /dev/null @@ -1,212 +0,0 @@ -/* - * 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); - |