X-Git-Url: https://git.kernelconcepts.de/?a=blobdiff_plain;f=drivers%2Finput%2Fcros_ec_keyb.c;h=a31aa77102522b04a579a4a94442398d196066bc;hb=8d607604c1dbe8e695279e0c0c9617de98c3e498;hp=c19730822138b2c1a24feb0e95532bf8e1f5b8ce;hpb=5a34d9bf31a021987f97f20aefa812b97b58584e;p=karo-tx-uboot.git diff --git a/drivers/input/cros_ec_keyb.c b/drivers/input/cros_ec_keyb.c index c197308221..a31aa77102 100644 --- a/drivers/input/cros_ec_keyb.c +++ b/drivers/input/cros_ec_keyb.c @@ -2,27 +2,13 @@ * Chromium OS Matrix Keyboard * * Copyright (c) 2012 The Chromium OS Authors. - * 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 #include +#include #include #include #include @@ -32,6 +18,8 @@ DECLARE_GLOBAL_DATA_PTR; enum { KBC_MAX_KEYS = 8, /* Maximum keys held down at once */ + KBC_REPEAT_RATE_MS = 30, + KBC_REPEAT_DELAY_MS = 240, }; static struct keyb { @@ -40,8 +28,6 @@ static struct keyb { struct key_matrix matrix; /* The key matrix layer */ int key_rows; /* Number of keyboard rows */ int key_cols; /* Number of keyboard columns */ - unsigned int repeat_delay_ms; /* Time before autorepeat starts */ - unsigned int repeat_rate_ms; /* Autorepeat rate in ms */ int ghost_filter; /* 1 to enable ghost filter, else 0 */ int inited; /* 1 if keyboard is ready */ } config; @@ -54,20 +40,34 @@ static struct keyb { * @param config Keyboard config * @param keys List of keys that we have detected * @param max_count Maximum number of keys to return - * @return number of pressed keys, 0 for none + * @param samep Set to true if this scan repeats the last, else false + * @return number of pressed keys, 0 for none, -EIO on error */ static int check_for_keys(struct keyb *config, - struct key_matrix_key *keys, int max_count) + struct key_matrix_key *keys, int max_count, + bool *samep) { struct key_matrix_key *key; + static struct mbkp_keyscan last_scan; + static bool last_scan_valid; struct mbkp_keyscan scan; unsigned int row, col, bit, data; int num_keys; if (cros_ec_scan_keyboard(config->dev, &scan)) { debug("%s: keyboard scan failed\n", __func__); - return -1; + return -EIO; } + *samep = last_scan_valid && !memcmp(&last_scan, &scan, sizeof(scan)); + + /* + * This is a bit odd. The EC has no way to tell us that it has run + * out of key scans. It just returns the same scan over and over + * again. So the only way to detect that we have run out is to detect + * that this scan is the same as the last. + */ + last_scan_valid = true; + memcpy(&last_scan, &scan, sizeof(last_scan)); for (col = num_keys = bit = 0; col < config->matrix.num_cols; col++) { @@ -93,7 +93,7 @@ static int check_for_keys(struct keyb *config, * * @return 0 if no keys available, 1 if keys are available */ -static int kbd_tstc(void) +static int kbd_tstc(struct stdio_dev *dev) { /* Just get input to do this for us */ return config.inited ? input_tstc(&config.input) : 0; @@ -104,7 +104,7 @@ static int kbd_tstc(void) * * @return ASCII key code, or 0 if no key, or -1 if error */ -static int kbd_getc(void) +static int kbd_getc(struct stdio_dev *dev) { /* Just get input to do this for us */ return config.inited ? input_getc(&config.input) : 0; @@ -127,6 +127,7 @@ int cros_ec_kbc_check(struct input_config *input) int keycodes[KBC_MAX_KEYS]; int num_keys, num_keycodes; int irq_pending, sent; + bool same = false; /* * Loop until the EC has no more keyscan records, or we have @@ -140,7 +141,10 @@ int cros_ec_kbc_check(struct input_config *input) do { irq_pending = cros_ec_interrupt_pending(config.dev); if (irq_pending) { - num_keys = check_for_keys(&config, keys, KBC_MAX_KEYS); + num_keys = check_for_keys(&config, keys, KBC_MAX_KEYS, + &same); + if (num_keys < 0) + return 0; last_num_keys = num_keys; memcpy(last_keys, keys, sizeof(keys)); } else { @@ -157,6 +161,13 @@ int cros_ec_kbc_check(struct input_config *input) num_keycodes = key_matrix_decode(&config.matrix, keys, num_keys, keycodes, KBC_MAX_KEYS); sent = input_send_keycodes(input, keycodes, num_keycodes); + + /* + * For those ECs without an interrupt, stop scanning when we + * see that the scan is the same as last time. + */ + if ((irq_pending < 0) && same) + break; } while (irq_pending && !sent); return 1; @@ -177,8 +188,8 @@ static int cros_ec_keyb_decode_fdt(const void *blob, int node, * Get keyboard rows and columns - at present we are limited to * 8 columns by the protocol (one byte per row scan) */ - config->key_rows = fdtdec_get_int(blob, node, "google,key-rows", 0); - config->key_cols = fdtdec_get_int(blob, node, "google,key-columns", 0); + config->key_rows = fdtdec_get_int(blob, node, "keypad,num-rows", 0); + config->key_cols = fdtdec_get_int(blob, node, "keypad,num-columns", 0); if (!config->key_rows || !config->key_cols || config->key_rows * config->key_cols / 8 > CROS_EC_KEYSCAN_COLS) { @@ -186,12 +197,8 @@ static int cros_ec_keyb_decode_fdt(const void *blob, int node, config->key_rows, config->key_cols); return -1; } - config->repeat_delay_ms = fdtdec_get_int(blob, node, - "google,repeat-delay-ms", 0); - config->repeat_rate_ms = fdtdec_get_int(blob, node, - "google,repeat-rate-ms", 0); config->ghost_filter = fdtdec_get_bool(blob, node, - "google,ghost-filter"); + "google,needs-ghost-filter"); return 0; } @@ -203,7 +210,7 @@ static int cros_ec_keyb_decode_fdt(const void *blob, int node, * * @return 0 if ok, -1 on error */ -static int cros_ec_init_keyboard(void) +static int cros_ec_init_keyboard(struct stdio_dev *dev) { const void *blob = gd->fdt_blob; int node; @@ -221,8 +228,8 @@ static int cros_ec_init_keyboard(void) } if (cros_ec_keyb_decode_fdt(blob, node, &config)) return -1; - input_set_delays(&config.input, config.repeat_delay_ms, - config.repeat_rate_ms); + input_set_delays(&config.input, KBC_REPEAT_DELAY_MS, + KBC_REPEAT_RATE_MS); if (key_matrix_init(&config.matrix, config.key_rows, config.key_cols, config.ghost_filter)) { debug("%s: cannot init key matrix\n", __func__);