* Copyright (c) 2012 The Chromium OS Authors.
* (C) Copyright 2004 DENX Software Engineering, Wolfgang Denk, wd@denx.de
*
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * 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
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
-#include <fdtdec.h>
+#include <dm.h>
#include <key_matrix.h>
#include <malloc.h>
#include <linux/input.h>
int key_in_same_col = 0, key_in_same_row = 0;
int i, j;
+ if (!config->ghost_filter || valid < 3)
+ return 0;
+
for (i = 0; i < valid; i++) {
/*
* Find 2 keys such that one key is in the same row
}
/* For a ghost key config, ignore the keypresses for this iteration. */
- if (valid >= 3 && has_ghosting(config, keys, valid)) {
+ if (has_ghosting(config, keys, valid)) {
valid = 0;
debug(" ghosting detected!\n");
}
* @param pos Returns position of map_keycode, if found, else -1
* @return map Pointer to allocated map
*/
-static uchar *create_keymap(struct key_matrix *config, u32 *data, int len,
+static uchar *create_keymap(struct key_matrix *config, const u32 *data, int len,
int map_keycode, int *pos)
{
uchar *map;
key_code = tmp & 0xffff;
entry = row * config->num_cols + col;
map[entry] = key_code;
+ debug(" map %d, %d: pos=%d, keycode=%d\n", row, col,
+ entry, key_code);
if (pos && map_keycode == key_code)
*pos = entry;
}
return map;
}
-int key_matrix_decode_fdt(struct key_matrix *config, const void *blob,
- int node)
+int key_matrix_decode_fdt(struct udevice *dev, struct key_matrix *config)
{
- const struct fdt_property *prop;
- int offset;
-
- /* Check each property name for ones that we understand */
- for (offset = fdt_first_property_offset(blob, node);
- offset > 0;
- offset = fdt_next_property_offset(blob, offset)) {
- const char *name;
- int len;
-
- prop = fdt_get_property_by_offset(blob, offset, NULL);
- name = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
- len = strlen(name);
-
- /* Name needs to match "1,<type>keymap" */
- debug("%s: property '%s'\n", __func__, name);
- if (strncmp(name, "1,", 2) || len < 8 ||
- strcmp(name + len - 6, "keymap"))
- continue;
+ const u32 *prop;
+ int proplen;
+ uchar *plain_keycode;
- len -= 8;
- if (len == 0) {
- config->plain_keycode = create_keymap(config,
- (u32 *)prop->data, fdt32_to_cpu(prop->len),
- KEY_FN, &config->fn_pos);
- } else if (0 == strncmp(name + 2, "fn-", len)) {
- config->fn_keycode = create_keymap(config,
- (u32 *)prop->data, fdt32_to_cpu(prop->len),
- -1, NULL);
- } else {
- debug("%s: unrecognised property '%s'\n", __func__,
- name);
- }
+ prop = dev_read_prop(dev, "linux,keymap", &proplen);
+ /* Basic keymap is required */
+ if (!prop) {
+ debug("%s: cannot find keycode-plain map\n", __func__);
+ return -1;
}
- debug("%s: Decoded key maps %p, %p from fdt\n", __func__,
- config->plain_keycode, config->fn_keycode);
- if (!config->plain_keycode) {
- debug("%s: cannot find keycode-plain map\n", __func__);
+ plain_keycode = create_keymap(config, prop, proplen, KEY_FN,
+ &config->fn_pos);
+ config->plain_keycode = plain_keycode;
+ /* Conversion error -> fail */
+ if (!config->plain_keycode)
+ return -1;
+
+ prop = dev_read_prop(dev, "linux,fn-keymap", &proplen);
+ /* fn keymap is optional */
+ if (!prop)
+ goto done;
+
+ config->fn_keycode = create_keymap(config, prop, proplen, -1, NULL);
+ /* Conversion error -> fail */
+ if (!config->fn_keycode) {
+ free(plain_keycode);
return -1;
}
+done:
+ debug("%s: Decoded key maps %p, %p from fdt\n", __func__,
+ config->plain_keycode, config->fn_keycode);
return 0;
}
-int key_matrix_init(struct key_matrix *config, int rows, int cols)
+int key_matrix_init(struct key_matrix *config, int rows, int cols,
+ int ghost_filter)
{
memset(config, '\0', sizeof(*config));
config->num_rows = rows;
config->num_cols = cols;
config->key_count = rows * cols;
+ config->ghost_filter = ghost_filter;
assert(config->key_count > 0);
return 0;
projects / people / ms / u-boot.git / blobdiff