diff options
Diffstat (limited to 'target/linux/s3c24xx/files-2.6.31/drivers/input/touchscreen/ts_filter_mean.c')
| -rw-r--r-- | target/linux/s3c24xx/files-2.6.31/drivers/input/touchscreen/ts_filter_mean.c | 174 |
1 files changed, 0 insertions, 174 deletions
diff --git a/target/linux/s3c24xx/files-2.6.31/drivers/input/touchscreen/ts_filter_mean.c b/target/linux/s3c24xx/files-2.6.31/drivers/input/touchscreen/ts_filter_mean.c deleted file mode 100644 index 8b85f676fe..0000000000 --- a/target/linux/s3c24xx/files-2.6.31/drivers/input/touchscreen/ts_filter_mean.c +++ /dev/null @@ -1,174 +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; 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); - |