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2024-02-20 e636c8d336489bf3eed5878299e6cc045bbad077 
 kernel/drivers/platform/x86/ideapad-laptop.c
....@@ -1,23 +1,9 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23  *  ideapad-laptop.c - Lenovo IdeaPad ACPI Extras
34  *
45  *  Copyright © 2010 Intel Corporation
56  *  Copyright © 2010 David Woodhouse <dwmw2@infradead.org>
6
- *
7
- *  This program is free software; you can redistribute it and/or modify
8
- *  it under the terms of the GNU General Public License as published by
9
- *  the Free Software Foundation; either version 2 of the License, or
10
- *  (at your option) any later version.
11
- *
12
- *  This program is distributed in the hope that it will be useful,
13
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
14
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15
- *  GNU General Public License for more details.
16
- *
17
- *  You should have received a copy of the GNU General Public License
18
- *  along with this program; if not, write to the Free Software
19
- *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
20
- *  02110-1301, USA.
217  */
228 
239 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
....@@ -106,6 +92,7 @@
10692 	struct dentry *debug;
10793 	unsigned long cfg;
10894 	bool has_hw_rfkill_switch;
95
+	bool has_touchpad_switch;
10996 	const char *fnesc_guid;
11097 };
11198 
....@@ -212,7 +199,7 @@
212199 			return 0;
213200 		}
214201 	}
215
-	pr_err("timeout in read_ec_cmd\n");
202
+	pr_err("timeout in %s\n", __func__);
216203 	return -1;
217204 }
218205 
....@@ -330,34 +317,15 @@
330317 }
331318 DEFINE_SHOW_ATTRIBUTE(debugfs_cfg);
332319 
333
-static int ideapad_debugfs_init(struct ideapad_private *priv)
320
+static void ideapad_debugfs_init(struct ideapad_private *priv)
334321 {
335
-	struct dentry *node;
322
+	struct dentry *dir;
336323 
337
-	priv->debug = debugfs_create_dir("ideapad", NULL);
338
-	if (priv->debug == NULL) {
339
-		pr_err("failed to create debugfs directory");
340
-		goto errout;
341
-	}
324
+	dir = debugfs_create_dir("ideapad", NULL);
325
+	priv->debug = dir;
342326 
343
-	node = debugfs_create_file("cfg", S_IRUGO, priv->debug, priv,
344
-				   &debugfs_cfg_fops);
345
-	if (!node) {
346
-		pr_err("failed to create cfg in debugfs");
347
-		goto errout;
348
-	}
349
-
350
-	node = debugfs_create_file("status", S_IRUGO, priv->debug, priv,
351
-				   &debugfs_status_fops);
352
-	if (!node) {
353
-		pr_err("failed to create status in debugfs");
354
-		goto errout;
355
-	}
356
-
357
-	return 0;
358
-
359
-errout:
360
-	return -ENOMEM;
327
+	debugfs_create_file("cfg", S_IRUGO, dir, priv, &debugfs_cfg_fops);
328
+	debugfs_create_file("status", S_IRUGO, dir, priv, &debugfs_status_fops);
361329 }
362330 
363331 static void ideapad_debugfs_exit(struct ideapad_private *priv)
....@@ -568,7 +536,9 @@
568536 	} else if (attr == &dev_attr_fn_lock.attr) {
569537 		supported = acpi_has_method(priv->adev->handle, "HALS") &&
570538 			acpi_has_method(priv->adev->handle, "SALS");
571
-	} else
539
+	} else if (attr == &dev_attr_touchpad.attr)
540
+		supported = priv->has_touchpad_switch;
541
+	else
572542 		supported = true;
573543 
574544 	return supported ? attr->mode : 0;
....@@ -900,6 +870,9 @@
900870 {
901871 	unsigned long value;
902872 
873
+	if (!priv->has_touchpad_switch)
874
+		return;
875
+
903876 	/* Without reading from EC touchpad LED doesn't switch state */
904877 	if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value)) {
905878 		/* Some IdeaPads don't really turn off touchpad - they only
....@@ -980,263 +953,21 @@
980953 #endif
981954 
982955 /*
983
- * Some ideapads don't have a hardware rfkill switch, reading VPCCMD_R_RF
984
- * always results in 0 on these models, causing ideapad_laptop to wrongly
985
- * report all radios as hardware-blocked.
956
+ * Some ideapads have a hardware rfkill switch, but most do not have one.
957
+ * Reading VPCCMD_R_RF always results in 0 on models without a hardware rfkill,
958
+ * switch causing ideapad_laptop to wrongly report all radios as hw-blocked.
959
+ * There used to be a long list of DMI ids for models without a hw rfkill
960
+ * switch here, but that resulted in playing whack a mole.
961
+ * More importantly wrongly reporting the wifi radio as hw-blocked, results in
962
+ * non working wifi. Whereas not reporting it hw-blocked, when it actually is
963
+ * hw-blocked results in an empty SSID list, which is a much more benign
964
+ * failure mode.
965
+ * So the default now is the much safer option of assuming there is no
966
+ * hardware rfkill switch. This default also actually matches most hardware,
967
+ * since having a hw rfkill switch is quite rare on modern hardware, so this
968
+ * also leads to a much shorter list.
986969  */
987
-static const struct dmi_system_id no_hw_rfkill_list[] = {
988
-	{
989
-		.ident = "Lenovo RESCUER R720-15IKBN",
990
-		.matches = {
991
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
992
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo R720-15IKBN"),
993
-		},
994
-	},
995
-	{
996
-		.ident = "Lenovo G40-30",
997
-		.matches = {
998
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
999
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo G40-30"),
1000
-		},
1001
-	},
1002
-	{
1003
-		.ident = "Lenovo G50-30",
1004
-		.matches = {
1005
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1006
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo G50-30"),
1007
-		},
1008
-	},
1009
-	{
1010
-		.ident = "Lenovo V310-14IKB",
1011
-		.matches = {
1012
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1013
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo V310-14IKB"),
1014
-		},
1015
-	},
1016
-	{
1017
-		.ident = "Lenovo V310-14ISK",
1018
-		.matches = {
1019
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1020
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo V310-14ISK"),
1021
-		},
1022
-	},
1023
-	{
1024
-		.ident = "Lenovo V310-15IKB",
1025
-		.matches = {
1026
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1027
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo V310-15IKB"),
1028
-		},
1029
-	},
1030
-	{
1031
-		.ident = "Lenovo V310-15ISK",
1032
-		.matches = {
1033
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1034
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo V310-15ISK"),
1035
-		},
1036
-	},
1037
-	{
1038
-		.ident = "Lenovo V510-15IKB",
1039
-		.matches = {
1040
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1041
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo V510-15IKB"),
1042
-		},
1043
-	},
1044
-	{
1045
-		.ident = "Lenovo ideapad 300-15IBR",
1046
-		.matches = {
1047
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1048
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 300-15IBR"),
1049
-		},
1050
-	},
1051
-	{
1052
-		.ident = "Lenovo ideapad 300-15IKB",
1053
-		.matches = {
1054
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1055
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 300-15IKB"),
1056
-		},
1057
-	},
1058
-	{
1059
-		.ident = "Lenovo ideapad 300S-11IBR",
1060
-		.matches = {
1061
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1062
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 300S-11BR"),
1063
-		},
1064
-	},
1065
-	{
1066
-		.ident = "Lenovo ideapad 310-15ABR",
1067
-		.matches = {
1068
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1069
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 310-15ABR"),
1070
-		},
1071
-	},
1072
-	{
1073
-		.ident = "Lenovo ideapad 310-15IAP",
1074
-		.matches = {
1075
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1076
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 310-15IAP"),
1077
-		},
1078
-	},
1079
-	{
1080
-		.ident = "Lenovo ideapad 310-15IKB",
1081
-		.matches = {
1082
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1083
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 310-15IKB"),
1084
-		},
1085
-	},
1086
-	{
1087
-		.ident = "Lenovo ideapad 310-15ISK",
1088
-		.matches = {
1089
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1090
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 310-15ISK"),
1091
-		},
1092
-	},
1093
-	{
1094
-		.ident = "Lenovo ideapad Y700-14ISK",
1095
-		.matches = {
1096
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1097
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700-14ISK"),
1098
-		},
1099
-	},
1100
-	{
1101
-		.ident = "Lenovo ideapad Y700-15ACZ",
1102
-		.matches = {
1103
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1104
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700-15ACZ"),
1105
-		},
1106
-	},
1107
-	{
1108
-		.ident = "Lenovo ideapad Y700-15ISK",
1109
-		.matches = {
1110
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1111
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700-15ISK"),
1112
-		},
1113
-	},
1114
-	{
1115
-		.ident = "Lenovo ideapad Y700 Touch-15ISK",
1116
-		.matches = {
1117
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1118
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700 Touch-15ISK"),
1119
-		},
1120
-	},
1121
-	{
1122
-		.ident = "Lenovo ideapad Y700-17ISK",
1123
-		.matches = {
1124
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1125
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700-17ISK"),
1126
-		},
1127
-	},
1128
-	{
1129
-		.ident = "Lenovo ideapad MIIX 720-12IKB",
1130
-		.matches = {
1131
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1132
-			DMI_MATCH(DMI_PRODUCT_VERSION, "MIIX 720-12IKB"),
1133
-		},
1134
-	},
1135
-	{
1136
-		.ident = "Lenovo Legion Y520-15IKB",
1137
-		.matches = {
1138
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1139
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Y520-15IKB"),
1140
-		},
1141
-	},
1142
-	{
1143
-		.ident = "Lenovo Y520-15IKBM",
1144
-		.matches = {
1145
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1146
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Y520-15IKBM"),
1147
-		},
1148
-	},
1149
-	{
1150
-		.ident = "Lenovo Legion Y720-15IKB",
1151
-		.matches = {
1152
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1153
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Y720-15IKB"),
1154
-		},
1155
-	},
1156
-	{
1157
-		.ident = "Lenovo Legion Y720-15IKBN",
1158
-		.matches = {
1159
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1160
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Y720-15IKBN"),
1161
-		},
1162
-	},
1163
-	{
1164
-		.ident = "Lenovo Y720-15IKBM",
1165
-		.matches = {
1166
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1167
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Y720-15IKBM"),
1168
-		},
1169
-	},
1170
-	{
1171
-		.ident = "Lenovo Yoga 2 11 / 13 / Pro",
1172
-		.matches = {
1173
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1174
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 2"),
1175
-		},
1176
-	},
1177
-	{
1178
-		.ident = "Lenovo Yoga 2 11 / 13 / Pro",
1179
-		.matches = {
1180
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1181
-			DMI_MATCH(DMI_BOARD_NAME, "Yoga2"),
1182
-		},
1183
-	},
1184
-	{
1185
-		.ident = "Lenovo Yoga 3 1170 / 1470",
1186
-		.matches = {
1187
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1188
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 3"),
1189
-		},
1190
-	},
1191
-	{
1192
-		.ident = "Lenovo Yoga 3 Pro 1370",
1193
-		.matches = {
1194
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1195
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 3"),
1196
-		},
1197
-	},
1198
-	{
1199
-		.ident = "Lenovo Yoga 700",
1200
-		.matches = {
1201
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1202
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 700"),
1203
-		},
1204
-	},
1205
-	{
1206
-		.ident = "Lenovo Yoga 900",
1207
-		.matches = {
1208
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1209
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 900"),
1210
-		},
1211
-	},
1212
-	{
1213
-		.ident = "Lenovo Yoga 900",
1214
-		.matches = {
1215
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1216
-			DMI_MATCH(DMI_BOARD_NAME, "VIUU4"),
1217
-		},
1218
-	},
1219
-	{
1220
-		.ident = "Lenovo YOGA 910-13IKB",
1221
-		.matches = {
1222
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1223
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 910-13IKB"),
1224
-		},
1225
-	},
1226
-	{
1227
-		.ident = "Lenovo YOGA 920-13IKB",
1228
-		.matches = {
1229
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1230
-			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 920-13IKB"),
1231
-		},
1232
-	},
1233
-	{
1234
-		.ident = "Lenovo Zhaoyang E42-80",
1235
-		.matches = {
1236
-			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1237
-			DMI_MATCH(DMI_PRODUCT_VERSION, "ZHAOYANG E42-80"),
1238
-		},
1239
-	},
970
+static const struct dmi_system_id hw_rfkill_list[] = {
1240971 	{}
1241972 };
1242973 
....@@ -1262,15 +993,16 @@
1262993 	priv->cfg = cfg;
1263994 	priv->adev = adev;
1264995 	priv->platform_device = pdev;
1265
-	priv->has_hw_rfkill_switch = !dmi_check_system(no_hw_rfkill_list);
996
+	priv->has_hw_rfkill_switch = dmi_check_system(hw_rfkill_list);
997
+
998
+	/* Most ideapads with ELAN0634 touchpad don't use EC touchpad switch */
999
+	priv->has_touchpad_switch = !acpi_dev_present("ELAN0634", NULL, -1);
12661000 
12671001 	ret = ideapad_sysfs_init(priv);
12681002 	if (ret)
12691003 		return ret;
12701004 
1271
-	ret = ideapad_debugfs_init(priv);
1272
-	if (ret)
1273
-		goto debugfs_failed;
1005
+	ideapad_debugfs_init(priv);
12741006 
12751007 	ret = ideapad_input_init(priv);
12761008 	if (ret)
....@@ -1282,6 +1014,10 @@
12821014 	 */
12831015 	if (!priv->has_hw_rfkill_switch)
12841016 		write_ec_cmd(priv->adev->handle, VPCCMD_W_RF, 1);
1017
+
1018
+	/* The same for Touchpad */
1019
+	if (!priv->has_touchpad_switch)
1020
+		write_ec_cmd(priv->adev->handle, VPCCMD_W_TOUCHPAD, 1);
12851021 
12861022 	for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
12871023 		if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg))
....@@ -1327,7 +1063,6 @@
13271063 	ideapad_input_exit(priv);
13281064 input_failed:
13291065 	ideapad_debugfs_exit(priv);
1330
-debugfs_failed:
13311066 	ideapad_sysfs_exit(priv);
13321067 	return ret;
13331068 }