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-rw-r--r--drivers/platform/x86/dell-laptop.c1055
1 files changed, 6 insertions, 1049 deletions
diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c
index 9411eae39a4e..3d21efe11d7b 100644
--- a/drivers/platform/x86/dell-laptop.c
+++ b/drivers/platform/x86/dell-laptop.c
@@ -2,11 +2,9 @@
2 * Driver for Dell laptop extras 2 * Driver for Dell laptop extras
3 * 3 *
4 * Copyright (c) Red Hat <mjg@redhat.com> 4 * Copyright (c) Red Hat <mjg@redhat.com>
5 * Copyright (c) 2014 Gabriele Mazzotta <gabriele.mzt@gmail.com>
6 * Copyright (c) 2014 Pali Rohár <pali.rohar@gmail.com>
7 * 5 *
8 * Based on documentation in the libsmbios package: 6 * Based on documentation in the libsmbios package, Copyright (C) 2005 Dell
9 * Copyright (C) 2005-2014 Dell Inc. 7 * Inc.
10 * 8 *
11 * This program is free software; you can redistribute it and/or modify 9 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as 10 * it under the terms of the GNU General Public License version 2 as
@@ -34,13 +32,6 @@
34#include "../../firmware/dcdbas.h" 32#include "../../firmware/dcdbas.h"
35 33
36#define BRIGHTNESS_TOKEN 0x7d 34#define BRIGHTNESS_TOKEN 0x7d
37#define KBD_LED_OFF_TOKEN 0x01E1
38#define KBD_LED_ON_TOKEN 0x01E2
39#define KBD_LED_AUTO_TOKEN 0x01E3
40#define KBD_LED_AUTO_25_TOKEN 0x02EA
41#define KBD_LED_AUTO_50_TOKEN 0x02EB
42#define KBD_LED_AUTO_75_TOKEN 0x02EC
43#define KBD_LED_AUTO_100_TOKEN 0x02F6
44 35
45/* This structure will be modified by the firmware when we enter 36/* This structure will be modified by the firmware when we enter
46 * system management mode, hence the volatiles */ 37 * system management mode, hence the volatiles */
@@ -71,13 +62,6 @@ struct calling_interface_structure {
71 62
72struct quirk_entry { 63struct quirk_entry {
73 u8 touchpad_led; 64 u8 touchpad_led;
74
75 int needs_kbd_timeouts;
76 /*
77 * Ordered list of timeouts expressed in seconds.
78 * The list must end with -1
79 */
80 int kbd_timeouts[];
81}; 65};
82 66
83static struct quirk_entry *quirks; 67static struct quirk_entry *quirks;
@@ -92,15 +76,6 @@ static int __init dmi_matched(const struct dmi_system_id *dmi)
92 return 1; 76 return 1;
93} 77}
94 78
95/*
96 * These values come from Windows utility provided by Dell. If any other value
97 * is used then BIOS silently set timeout to 0 without any error message.
98 */
99static struct quirk_entry quirk_dell_xps13_9333 = {
100 .needs_kbd_timeouts = 1,
101 .kbd_timeouts = { 0, 5, 15, 60, 5 * 60, 15 * 60, -1 },
102};
103
104static int da_command_address; 79static int da_command_address;
105static int da_command_code; 80static int da_command_code;
106static int da_num_tokens; 81static int da_num_tokens;
@@ -292,15 +267,6 @@ static const struct dmi_system_id dell_quirks[] __initconst = {
292 }, 267 },
293 .driver_data = &quirk_dell_vostro_v130, 268 .driver_data = &quirk_dell_vostro_v130,
294 }, 269 },
295 {
296 .callback = dmi_matched,
297 .ident = "Dell XPS13 9333",
298 .matches = {
299 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
300 DMI_MATCH(DMI_PRODUCT_NAME, "XPS13 9333"),
301 },
302 .driver_data = &quirk_dell_xps13_9333,
303 },
304 { } 270 { }
305}; 271};
306 272
@@ -365,29 +331,17 @@ static void __init find_tokens(const struct dmi_header *dm, void *dummy)
365 } 331 }
366} 332}
367 333
368static int find_token_id(int tokenid) 334static int find_token_location(int tokenid)
369{ 335{
370 int i; 336 int i;
371
372 for (i = 0; i < da_num_tokens; i++) { 337 for (i = 0; i < da_num_tokens; i++) {
373 if (da_tokens[i].tokenID == tokenid) 338 if (da_tokens[i].tokenID == tokenid)
374 return i; 339 return da_tokens[i].location;
375 } 340 }
376 341
377 return -1; 342 return -1;
378} 343}
379 344
380static int find_token_location(int tokenid)
381{
382 int id;
383
384 id = find_token_id(tokenid);
385 if (id == -1)
386 return -1;
387
388 return da_tokens[id].location;
389}
390
391static struct calling_interface_buffer * 345static struct calling_interface_buffer *
392dell_send_request(struct calling_interface_buffer *buffer, int class, 346dell_send_request(struct calling_interface_buffer *buffer, int class,
393 int select) 347 int select)
@@ -408,20 +362,6 @@ dell_send_request(struct calling_interface_buffer *buffer, int class,
408 return buffer; 362 return buffer;
409} 363}
410 364
411static inline int dell_smi_error(int value)
412{
413 switch (value) {
414 case 0: /* Completed successfully */
415 return 0;
416 case -1: /* Completed with error */
417 return -EIO;
418 case -2: /* Function not supported */
419 return -ENXIO;
420 default: /* Unknown error */
421 return -EINVAL;
422 }
423}
424
425/* Derived from information in DellWirelessCtl.cpp: 365/* Derived from information in DellWirelessCtl.cpp:
426 Class 17, select 11 is radio control. It returns an array of 32-bit values. 366 Class 17, select 11 is radio control. It returns an array of 32-bit values.
427 367
@@ -776,7 +716,7 @@ static int dell_send_intensity(struct backlight_device *bd)
776 else 716 else
777 dell_send_request(buffer, 1, 1); 717 dell_send_request(buffer, 1, 1);
778 718
779 out: 719out:
780 release_buffer(); 720 release_buffer();
781 return ret; 721 return ret;
782} 722}
@@ -800,7 +740,7 @@ static int dell_get_intensity(struct backlight_device *bd)
800 740
801 ret = buffer->output[1]; 741 ret = buffer->output[1];
802 742
803 out: 743out:
804 release_buffer(); 744 release_buffer();
805 return ret; 745 return ret;
806} 746}
@@ -849,984 +789,6 @@ static void touchpad_led_exit(void)
849 led_classdev_unregister(&touchpad_led); 789 led_classdev_unregister(&touchpad_led);
850} 790}
851 791
852/*
853 * Derived from information in smbios-keyboard-ctl:
854 *
855 * cbClass 4
856 * cbSelect 11
857 * Keyboard illumination
858 * cbArg1 determines the function to be performed
859 *
860 * cbArg1 0x0 = Get Feature Information
861 * cbRES1 Standard return codes (0, -1, -2)
862 * cbRES2, word0 Bitmap of user-selectable modes
863 * bit 0 Always off (All systems)
864 * bit 1 Always on (Travis ATG, Siberia)
865 * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
866 * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
867 * bit 4 Auto: Input-activity-based On; input-activity based Off
868 * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
869 * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
870 * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
871 * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
872 * bits 9-15 Reserved for future use
873 * cbRES2, byte2 Reserved for future use
874 * cbRES2, byte3 Keyboard illumination type
875 * 0 Reserved
876 * 1 Tasklight
877 * 2 Backlight
878 * 3-255 Reserved for future use
879 * cbRES3, byte0 Supported auto keyboard illumination trigger bitmap.
880 * bit 0 Any keystroke
881 * bit 1 Touchpad activity
882 * bit 2 Pointing stick
883 * bit 3 Any mouse
884 * bits 4-7 Reserved for future use
885 * cbRES3, byte1 Supported timeout unit bitmap
886 * bit 0 Seconds
887 * bit 1 Minutes
888 * bit 2 Hours
889 * bit 3 Days
890 * bits 4-7 Reserved for future use
891 * cbRES3, byte2 Number of keyboard light brightness levels
892 * cbRES4, byte0 Maximum acceptable seconds value (0 if seconds not supported).
893 * cbRES4, byte1 Maximum acceptable minutes value (0 if minutes not supported).
894 * cbRES4, byte2 Maximum acceptable hours value (0 if hours not supported).
895 * cbRES4, byte3 Maximum acceptable days value (0 if days not supported)
896 *
897 * cbArg1 0x1 = Get Current State
898 * cbRES1 Standard return codes (0, -1, -2)
899 * cbRES2, word0 Bitmap of current mode state
900 * bit 0 Always off (All systems)
901 * bit 1 Always on (Travis ATG, Siberia)
902 * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
903 * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
904 * bit 4 Auto: Input-activity-based On; input-activity based Off
905 * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
906 * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
907 * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
908 * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
909 * bits 9-15 Reserved for future use
910 * Note: Only One bit can be set
911 * cbRES2, byte2 Currently active auto keyboard illumination triggers.
912 * bit 0 Any keystroke
913 * bit 1 Touchpad activity
914 * bit 2 Pointing stick
915 * bit 3 Any mouse
916 * bits 4-7 Reserved for future use
917 * cbRES2, byte3 Current Timeout
918 * bits 7:6 Timeout units indicator:
919 * 00b Seconds
920 * 01b Minutes
921 * 10b Hours
922 * 11b Days
923 * bits 5:0 Timeout value (0-63) in sec/min/hr/day
924 * NOTE: A value of 0 means always on (no timeout) if any bits of RES3 byte
925 * are set upon return from the [Get feature information] call.
926 * cbRES3, byte0 Current setting of ALS value that turns the light on or off.
927 * cbRES3, byte1 Current ALS reading
928 * cbRES3, byte2 Current keyboard light level.
929 *
930 * cbArg1 0x2 = Set New State
931 * cbRES1 Standard return codes (0, -1, -2)
932 * cbArg2, word0 Bitmap of current mode state
933 * bit 0 Always off (All systems)
934 * bit 1 Always on (Travis ATG, Siberia)
935 * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
936 * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
937 * bit 4 Auto: Input-activity-based On; input-activity based Off
938 * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
939 * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
940 * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
941 * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
942 * bits 9-15 Reserved for future use
943 * Note: Only One bit can be set
944 * cbArg2, byte2 Desired auto keyboard illumination triggers. Must remain inactive to allow
945 * keyboard to turn off automatically.
946 * bit 0 Any keystroke
947 * bit 1 Touchpad activity
948 * bit 2 Pointing stick
949 * bit 3 Any mouse
950 * bits 4-7 Reserved for future use
951 * cbArg2, byte3 Desired Timeout
952 * bits 7:6 Timeout units indicator:
953 * 00b Seconds
954 * 01b Minutes
955 * 10b Hours
956 * 11b Days
957 * bits 5:0 Timeout value (0-63) in sec/min/hr/day
958 * cbArg3, byte0 Desired setting of ALS value that turns the light on or off.
959 * cbArg3, byte2 Desired keyboard light level.
960 */
961
962
963enum kbd_timeout_unit {
964 KBD_TIMEOUT_SECONDS = 0,
965 KBD_TIMEOUT_MINUTES,
966 KBD_TIMEOUT_HOURS,
967 KBD_TIMEOUT_DAYS,
968};
969
970enum kbd_mode_bit {
971 KBD_MODE_BIT_OFF = 0,
972 KBD_MODE_BIT_ON,
973 KBD_MODE_BIT_ALS,
974 KBD_MODE_BIT_TRIGGER_ALS,
975 KBD_MODE_BIT_TRIGGER,
976 KBD_MODE_BIT_TRIGGER_25,
977 KBD_MODE_BIT_TRIGGER_50,
978 KBD_MODE_BIT_TRIGGER_75,
979 KBD_MODE_BIT_TRIGGER_100,
980};
981
982#define kbd_is_als_mode_bit(bit) \
983 ((bit) == KBD_MODE_BIT_ALS || (bit) == KBD_MODE_BIT_TRIGGER_ALS)
984#define kbd_is_trigger_mode_bit(bit) \
985 ((bit) >= KBD_MODE_BIT_TRIGGER_ALS && (bit) <= KBD_MODE_BIT_TRIGGER_100)
986#define kbd_is_level_mode_bit(bit) \
987 ((bit) >= KBD_MODE_BIT_TRIGGER_25 && (bit) <= KBD_MODE_BIT_TRIGGER_100)
988
989struct kbd_info {
990 u16 modes;
991 u8 type;
992 u8 triggers;
993 u8 levels;
994 u8 seconds;
995 u8 minutes;
996 u8 hours;
997 u8 days;
998};
999
1000struct kbd_state {
1001 u8 mode_bit;
1002 u8 triggers;
1003 u8 timeout_value;
1004 u8 timeout_unit;
1005 u8 als_setting;
1006 u8 als_value;
1007 u8 level;
1008};
1009
1010static const int kbd_tokens[] = {
1011 KBD_LED_OFF_TOKEN,
1012 KBD_LED_AUTO_25_TOKEN,
1013 KBD_LED_AUTO_50_TOKEN,
1014 KBD_LED_AUTO_75_TOKEN,
1015 KBD_LED_AUTO_100_TOKEN,
1016 KBD_LED_ON_TOKEN,
1017};
1018
1019static u16 kbd_token_bits;
1020
1021static struct kbd_info kbd_info;
1022static bool kbd_als_supported;
1023static bool kbd_triggers_supported;
1024
1025static u8 kbd_mode_levels[16];
1026static int kbd_mode_levels_count;
1027
1028static u8 kbd_previous_level;
1029static u8 kbd_previous_mode_bit;
1030
1031static bool kbd_led_present;
1032
1033/*
1034 * NOTE: there are three ways to set the keyboard backlight level.
1035 * First, via kbd_state.mode_bit (assigning KBD_MODE_BIT_TRIGGER_* value).
1036 * Second, via kbd_state.level (assigning numerical value <= kbd_info.levels).
1037 * Third, via SMBIOS tokens (KBD_LED_* in kbd_tokens)
1038 *
1039 * There are laptops which support only one of these methods. If we want to
1040 * support as many machines as possible we need to implement all three methods.
1041 * The first two methods use the kbd_state structure. The third uses SMBIOS
1042 * tokens. If kbd_info.levels == 0, the machine does not support setting the
1043 * keyboard backlight level via kbd_state.level.
1044 */
1045
1046static int kbd_get_info(struct kbd_info *info)
1047{
1048 u8 units;
1049 int ret;
1050
1051 get_buffer();
1052
1053 buffer->input[0] = 0x0;
1054 dell_send_request(buffer, 4, 11);
1055 ret = buffer->output[0];
1056
1057 if (ret) {
1058 ret = dell_smi_error(ret);
1059 goto out;
1060 }
1061
1062 info->modes = buffer->output[1] & 0xFFFF;
1063 info->type = (buffer->output[1] >> 24) & 0xFF;
1064 info->triggers = buffer->output[2] & 0xFF;
1065 units = (buffer->output[2] >> 8) & 0xFF;
1066 info->levels = (buffer->output[2] >> 16) & 0xFF;
1067
1068 if (units & BIT(0))
1069 info->seconds = (buffer->output[3] >> 0) & 0xFF;
1070 if (units & BIT(1))
1071 info->minutes = (buffer->output[3] >> 8) & 0xFF;
1072 if (units & BIT(2))
1073 info->hours = (buffer->output[3] >> 16) & 0xFF;
1074 if (units & BIT(3))
1075 info->days = (buffer->output[3] >> 24) & 0xFF;
1076
1077 out:
1078 release_buffer();
1079 return ret;
1080}
1081
1082static unsigned int kbd_get_max_level(void)
1083{
1084 if (kbd_info.levels != 0)
1085 return kbd_info.levels;
1086 if (kbd_mode_levels_count > 0)
1087 return kbd_mode_levels_count - 1;
1088 return 0;
1089}
1090
1091static int kbd_get_level(struct kbd_state *state)
1092{
1093 int i;
1094
1095 if (kbd_info.levels != 0)
1096 return state->level;
1097
1098 if (kbd_mode_levels_count > 0) {
1099 for (i = 0; i < kbd_mode_levels_count; ++i)
1100 if (kbd_mode_levels[i] == state->mode_bit)
1101 return i;
1102 return 0;
1103 }
1104
1105 return -EINVAL;
1106}
1107
1108static int kbd_set_level(struct kbd_state *state, u8 level)
1109{
1110 if (kbd_info.levels != 0) {
1111 if (level != 0)
1112 kbd_previous_level = level;
1113 if (state->level == level)
1114 return 0;
1115 state->level = level;
1116 if (level != 0 && state->mode_bit == KBD_MODE_BIT_OFF)
1117 state->mode_bit = kbd_previous_mode_bit;
1118 else if (level == 0 && state->mode_bit != KBD_MODE_BIT_OFF) {
1119 kbd_previous_mode_bit = state->mode_bit;
1120 state->mode_bit = KBD_MODE_BIT_OFF;
1121 }
1122 return 0;
1123 }
1124
1125 if (kbd_mode_levels_count > 0 && level < kbd_mode_levels_count) {
1126 if (level != 0)
1127 kbd_previous_level = level;
1128 state->mode_bit = kbd_mode_levels[level];
1129 return 0;
1130 }
1131
1132 return -EINVAL;
1133}
1134
1135static int kbd_get_state(struct kbd_state *state)
1136{
1137 int ret;
1138
1139 get_buffer();
1140
1141 buffer->input[0] = 0x1;
1142 dell_send_request(buffer, 4, 11);
1143 ret = buffer->output[0];
1144
1145 if (ret) {
1146 ret = dell_smi_error(ret);
1147 goto out;
1148 }
1149
1150 state->mode_bit = ffs(buffer->output[1] & 0xFFFF);
1151 if (state->mode_bit != 0)
1152 state->mode_bit--;
1153
1154 state->triggers = (buffer->output[1] >> 16) & 0xFF;
1155 state->timeout_value = (buffer->output[1] >> 24) & 0x3F;
1156 state->timeout_unit = (buffer->output[1] >> 30) & 0x3;
1157 state->als_setting = buffer->output[2] & 0xFF;
1158 state->als_value = (buffer->output[2] >> 8) & 0xFF;
1159 state->level = (buffer->output[2] >> 16) & 0xFF;
1160
1161 out:
1162 release_buffer();
1163 return ret;
1164}
1165
1166static int kbd_set_state(struct kbd_state *state)
1167{
1168 int ret;
1169
1170 get_buffer();
1171 buffer->input[0] = 0x2;
1172 buffer->input[1] = BIT(state->mode_bit) & 0xFFFF;
1173 buffer->input[1] |= (state->triggers & 0xFF) << 16;
1174 buffer->input[1] |= (state->timeout_value & 0x3F) << 24;
1175 buffer->input[1] |= (state->timeout_unit & 0x3) << 30;
1176 buffer->input[2] = state->als_setting & 0xFF;
1177 buffer->input[2] |= (state->level & 0xFF) << 16;
1178 dell_send_request(buffer, 4, 11);
1179 ret = buffer->output[0];
1180 release_buffer();
1181
1182 return dell_smi_error(ret);
1183}
1184
1185static int kbd_set_state_safe(struct kbd_state *state, struct kbd_state *old)
1186{
1187 int ret;
1188
1189 ret = kbd_set_state(state);
1190 if (ret == 0)
1191 return 0;
1192
1193 /*
1194 * When setting the new state fails,try to restore the previous one.
1195 * This is needed on some machines where BIOS sets a default state when
1196 * setting a new state fails. This default state could be all off.
1197 */
1198
1199 if (kbd_set_state(old))
1200 pr_err("Setting old previous keyboard state failed\n");
1201
1202 return ret;
1203}
1204
1205static int kbd_set_token_bit(u8 bit)
1206{
1207 int id;
1208 int ret;
1209
1210 if (bit >= ARRAY_SIZE(kbd_tokens))
1211 return -EINVAL;
1212
1213 id = find_token_id(kbd_tokens[bit]);
1214 if (id == -1)
1215 return -EINVAL;
1216
1217 get_buffer();
1218 buffer->input[0] = da_tokens[id].location;
1219 buffer->input[1] = da_tokens[id].value;
1220 dell_send_request(buffer, 1, 0);
1221 ret = buffer->output[0];
1222 release_buffer();
1223
1224 return dell_smi_error(ret);
1225}
1226
1227static int kbd_get_token_bit(u8 bit)
1228{
1229 int id;
1230 int ret;
1231 int val;
1232
1233 if (bit >= ARRAY_SIZE(kbd_tokens))
1234 return -EINVAL;
1235
1236 id = find_token_id(kbd_tokens[bit]);
1237 if (id == -1)
1238 return -EINVAL;
1239
1240 get_buffer();
1241 buffer->input[0] = da_tokens[id].location;
1242 dell_send_request(buffer, 0, 0);
1243 ret = buffer->output[0];
1244 val = buffer->output[1];
1245 release_buffer();
1246
1247 if (ret)
1248 return dell_smi_error(ret);
1249
1250 return (val == da_tokens[id].value);
1251}
1252
1253static int kbd_get_first_active_token_bit(void)
1254{
1255 int i;
1256 int ret;
1257
1258 for (i = 0; i < ARRAY_SIZE(kbd_tokens); ++i) {
1259 ret = kbd_get_token_bit(i);
1260 if (ret == 1)
1261 return i;
1262 }
1263
1264 return ret;
1265}
1266
1267static int kbd_get_valid_token_counts(void)
1268{
1269 return hweight16(kbd_token_bits);
1270}
1271
1272static inline int kbd_init_info(void)
1273{
1274 struct kbd_state state;
1275 int ret;
1276 int i;
1277
1278 ret = kbd_get_info(&kbd_info);
1279 if (ret)
1280 return ret;
1281
1282 kbd_get_state(&state);
1283
1284 /* NOTE: timeout value is stored in 6 bits so max value is 63 */
1285 if (kbd_info.seconds > 63)
1286 kbd_info.seconds = 63;
1287 if (kbd_info.minutes > 63)
1288 kbd_info.minutes = 63;
1289 if (kbd_info.hours > 63)
1290 kbd_info.hours = 63;
1291 if (kbd_info.days > 63)
1292 kbd_info.days = 63;
1293
1294 /* NOTE: On tested machines ON mode did not work and caused
1295 * problems (turned backlight off) so do not use it
1296 */
1297 kbd_info.modes &= ~BIT(KBD_MODE_BIT_ON);
1298
1299 kbd_previous_level = kbd_get_level(&state);
1300 kbd_previous_mode_bit = state.mode_bit;
1301
1302 if (kbd_previous_level == 0 && kbd_get_max_level() != 0)
1303 kbd_previous_level = 1;
1304
1305 if (kbd_previous_mode_bit == KBD_MODE_BIT_OFF) {
1306 kbd_previous_mode_bit =
1307 ffs(kbd_info.modes & ~BIT(KBD_MODE_BIT_OFF));
1308 if (kbd_previous_mode_bit != 0)
1309 kbd_previous_mode_bit--;
1310 }
1311
1312 if (kbd_info.modes & (BIT(KBD_MODE_BIT_ALS) |
1313 BIT(KBD_MODE_BIT_TRIGGER_ALS)))
1314 kbd_als_supported = true;
1315
1316 if (kbd_info.modes & (
1317 BIT(KBD_MODE_BIT_TRIGGER_ALS) | BIT(KBD_MODE_BIT_TRIGGER) |
1318 BIT(KBD_MODE_BIT_TRIGGER_25) | BIT(KBD_MODE_BIT_TRIGGER_50) |
1319 BIT(KBD_MODE_BIT_TRIGGER_75) | BIT(KBD_MODE_BIT_TRIGGER_100)
1320 ))
1321 kbd_triggers_supported = true;
1322
1323 /* kbd_mode_levels[0] is reserved, see below */
1324 for (i = 0; i < 16; ++i)
1325 if (kbd_is_level_mode_bit(i) && (BIT(i) & kbd_info.modes))
1326 kbd_mode_levels[1 + kbd_mode_levels_count++] = i;
1327
1328 /*
1329 * Find the first supported mode and assign to kbd_mode_levels[0].
1330 * This should be 0 (off), but we cannot depend on the BIOS to
1331 * support 0.
1332 */
1333 if (kbd_mode_levels_count > 0) {
1334 for (i = 0; i < 16; ++i) {
1335 if (BIT(i) & kbd_info.modes) {
1336 kbd_mode_levels[0] = i;
1337 break;
1338 }
1339 }
1340 kbd_mode_levels_count++;
1341 }
1342
1343 return 0;
1344
1345}
1346
1347static inline void kbd_init_tokens(void)
1348{
1349 int i;
1350
1351 for (i = 0; i < ARRAY_SIZE(kbd_tokens); ++i)
1352 if (find_token_id(kbd_tokens[i]) != -1)
1353 kbd_token_bits |= BIT(i);
1354}
1355
1356static void kbd_init(void)
1357{
1358 int ret;
1359
1360 ret = kbd_init_info();
1361 kbd_init_tokens();
1362
1363 if (kbd_token_bits != 0 || ret == 0)
1364 kbd_led_present = true;
1365}
1366
1367static ssize_t kbd_led_timeout_store(struct device *dev,
1368 struct device_attribute *attr,
1369 const char *buf, size_t count)
1370{
1371 struct kbd_state new_state;
1372 struct kbd_state state;
1373 bool convert;
1374 int value;
1375 int ret;
1376 char ch;
1377 u8 unit;
1378 int i;
1379
1380 ret = sscanf(buf, "%d %c", &value, &ch);
1381 if (ret < 1)
1382 return -EINVAL;
1383 else if (ret == 1)
1384 ch = 's';
1385
1386 if (value < 0)
1387 return -EINVAL;
1388
1389 convert = false;
1390
1391 switch (ch) {
1392 case 's':
1393 if (value > kbd_info.seconds)
1394 convert = true;
1395 unit = KBD_TIMEOUT_SECONDS;
1396 break;
1397 case 'm':
1398 if (value > kbd_info.minutes)
1399 convert = true;
1400 unit = KBD_TIMEOUT_MINUTES;
1401 break;
1402 case 'h':
1403 if (value > kbd_info.hours)
1404 convert = true;
1405 unit = KBD_TIMEOUT_HOURS;
1406 break;
1407 case 'd':
1408 if (value > kbd_info.days)
1409 convert = true;
1410 unit = KBD_TIMEOUT_DAYS;
1411 break;
1412 default:
1413 return -EINVAL;
1414 }
1415
1416 if (quirks && quirks->needs_kbd_timeouts)
1417 convert = true;
1418
1419 if (convert) {
1420 /* Convert value from current units to seconds */
1421 switch (unit) {
1422 case KBD_TIMEOUT_DAYS:
1423 value *= 24;
1424 case KBD_TIMEOUT_HOURS:
1425 value *= 60;
1426 case KBD_TIMEOUT_MINUTES:
1427 value *= 60;
1428 unit = KBD_TIMEOUT_SECONDS;
1429 }
1430
1431 if (quirks && quirks->needs_kbd_timeouts) {
1432 for (i = 0; quirks->kbd_timeouts[i] != -1; i++) {
1433 if (value <= quirks->kbd_timeouts[i]) {
1434 value = quirks->kbd_timeouts[i];
1435 break;
1436 }
1437 }
1438 }
1439
1440 if (value <= kbd_info.seconds && kbd_info.seconds) {
1441 unit = KBD_TIMEOUT_SECONDS;
1442 } else if (value / 60 <= kbd_info.minutes && kbd_info.minutes) {
1443 value /= 60;
1444 unit = KBD_TIMEOUT_MINUTES;
1445 } else if (value / (60 * 60) <= kbd_info.hours && kbd_info.hours) {
1446 value /= (60 * 60);
1447 unit = KBD_TIMEOUT_HOURS;
1448 } else if (value / (60 * 60 * 24) <= kbd_info.days && kbd_info.days) {
1449 value /= (60 * 60 * 24);
1450 unit = KBD_TIMEOUT_DAYS;
1451 } else {
1452 return -EINVAL;
1453 }
1454 }
1455
1456 ret = kbd_get_state(&state);
1457 if (ret)
1458 return ret;
1459
1460 new_state = state;
1461 new_state.timeout_value = value;
1462 new_state.timeout_unit = unit;
1463
1464 ret = kbd_set_state_safe(&new_state, &state);
1465 if (ret)
1466 return ret;
1467
1468 return count;
1469}
1470
1471static ssize_t kbd_led_timeout_show(struct device *dev,
1472 struct device_attribute *attr, char *buf)
1473{
1474 struct kbd_state state;
1475 int ret;
1476 int len;
1477
1478 ret = kbd_get_state(&state);
1479 if (ret)
1480 return ret;
1481
1482 len = sprintf(buf, "%d", state.timeout_value);
1483
1484 switch (state.timeout_unit) {
1485 case KBD_TIMEOUT_SECONDS:
1486 return len + sprintf(buf+len, "s\n");
1487 case KBD_TIMEOUT_MINUTES:
1488 return len + sprintf(buf+len, "m\n");
1489 case KBD_TIMEOUT_HOURS:
1490 return len + sprintf(buf+len, "h\n");
1491 case KBD_TIMEOUT_DAYS:
1492 return len + sprintf(buf+len, "d\n");
1493 default:
1494 return -EINVAL;
1495 }
1496
1497 return len;
1498}
1499
1500static DEVICE_ATTR(stop_timeout, S_IRUGO | S_IWUSR,
1501 kbd_led_timeout_show, kbd_led_timeout_store);
1502
1503static const char * const kbd_led_triggers[] = {
1504 "keyboard",
1505 "touchpad",
1506 /*"trackstick"*/ NULL, /* NOTE: trackstick is just alias for touchpad */
1507 "mouse",
1508};
1509
1510static ssize_t kbd_led_triggers_store(struct device *dev,
1511 struct device_attribute *attr,
1512 const char *buf, size_t count)
1513{
1514 struct kbd_state new_state;
1515 struct kbd_state state;
1516 bool triggers_enabled = false;
1517 bool als_enabled = false;
1518 bool disable_als = false;
1519 bool enable_als = false;
1520 int trigger_bit = -1;
1521 char trigger[21];
1522 int i, ret;
1523
1524 ret = sscanf(buf, "%20s", trigger);
1525 if (ret != 1)
1526 return -EINVAL;
1527
1528 if (trigger[0] != '+' && trigger[0] != '-')
1529 return -EINVAL;
1530
1531 ret = kbd_get_state(&state);
1532 if (ret)
1533 return ret;
1534
1535 if (kbd_als_supported)
1536 als_enabled = kbd_is_als_mode_bit(state.mode_bit);
1537
1538 if (kbd_triggers_supported)
1539 triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
1540
1541 if (kbd_als_supported) {
1542 if (strcmp(trigger, "+als") == 0) {
1543 if (als_enabled)
1544 return count;
1545 enable_als = true;
1546 } else if (strcmp(trigger, "-als") == 0) {
1547 if (!als_enabled)
1548 return count;
1549 disable_als = true;
1550 }
1551 }
1552
1553 if (enable_als || disable_als) {
1554 new_state = state;
1555 if (enable_als) {
1556 if (triggers_enabled)
1557 new_state.mode_bit = KBD_MODE_BIT_TRIGGER_ALS;
1558 else
1559 new_state.mode_bit = KBD_MODE_BIT_ALS;
1560 } else {
1561 if (triggers_enabled) {
1562 new_state.mode_bit = KBD_MODE_BIT_TRIGGER;
1563 kbd_set_level(&new_state, kbd_previous_level);
1564 } else {
1565 new_state.mode_bit = KBD_MODE_BIT_ON;
1566 }
1567 }
1568 if (!(kbd_info.modes & BIT(new_state.mode_bit)))
1569 return -EINVAL;
1570 ret = kbd_set_state_safe(&new_state, &state);
1571 if (ret)
1572 return ret;
1573 kbd_previous_mode_bit = new_state.mode_bit;
1574 return count;
1575 }
1576
1577 if (kbd_triggers_supported) {
1578 for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); ++i) {
1579 if (!(kbd_info.triggers & BIT(i)))
1580 continue;
1581 if (!kbd_led_triggers[i])
1582 continue;
1583 if (strcmp(trigger+1, kbd_led_triggers[i]) != 0)
1584 continue;
1585 if (trigger[0] == '+' &&
1586 triggers_enabled && (state.triggers & BIT(i)))
1587 return count;
1588 if (trigger[0] == '-' &&
1589 (!triggers_enabled || !(state.triggers & BIT(i))))
1590 return count;
1591 trigger_bit = i;
1592 break;
1593 }
1594 }
1595
1596 if (trigger_bit != -1) {
1597 new_state = state;
1598 if (trigger[0] == '+')
1599 new_state.triggers |= BIT(trigger_bit);
1600 else {
1601 new_state.triggers &= ~BIT(trigger_bit);
1602 /* NOTE: trackstick bit (2) must be disabled when
1603 * disabling touchpad bit (1), otherwise touchpad
1604 * bit (1) will not be disabled */
1605 if (trigger_bit == 1)
1606 new_state.triggers &= ~BIT(2);
1607 }
1608 if ((kbd_info.triggers & new_state.triggers) !=
1609 new_state.triggers)
1610 return -EINVAL;
1611 if (new_state.triggers && !triggers_enabled) {
1612 if (als_enabled)
1613 new_state.mode_bit = KBD_MODE_BIT_TRIGGER_ALS;
1614 else {
1615 new_state.mode_bit = KBD_MODE_BIT_TRIGGER;
1616 kbd_set_level(&new_state, kbd_previous_level);
1617 }
1618 } else if (new_state.triggers == 0) {
1619 if (als_enabled)
1620 new_state.mode_bit = KBD_MODE_BIT_ALS;
1621 else
1622 kbd_set_level(&new_state, 0);
1623 }
1624 if (!(kbd_info.modes & BIT(new_state.mode_bit)))
1625 return -EINVAL;
1626 ret = kbd_set_state_safe(&new_state, &state);
1627 if (ret)
1628 return ret;
1629 if (new_state.mode_bit != KBD_MODE_BIT_OFF)
1630 kbd_previous_mode_bit = new_state.mode_bit;
1631 return count;
1632 }
1633
1634 return -EINVAL;
1635}
1636
1637static ssize_t kbd_led_triggers_show(struct device *dev,
1638 struct device_attribute *attr, char *buf)
1639{
1640 struct kbd_state state;
1641 bool triggers_enabled;
1642 int level, i, ret;
1643 int len = 0;
1644
1645 ret = kbd_get_state(&state);
1646 if (ret)
1647 return ret;
1648
1649 len = 0;
1650
1651 if (kbd_triggers_supported) {
1652 triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
1653 level = kbd_get_level(&state);
1654 for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); ++i) {
1655 if (!(kbd_info.triggers & BIT(i)))
1656 continue;
1657 if (!kbd_led_triggers[i])
1658 continue;
1659 if ((triggers_enabled || level <= 0) &&
1660 (state.triggers & BIT(i)))
1661 buf[len++] = '+';
1662 else
1663 buf[len++] = '-';
1664 len += sprintf(buf+len, "%s ", kbd_led_triggers[i]);
1665 }
1666 }
1667
1668 if (kbd_als_supported) {
1669 if (kbd_is_als_mode_bit(state.mode_bit))
1670 len += sprintf(buf+len, "+als ");
1671 else
1672 len += sprintf(buf+len, "-als ");
1673 }
1674
1675 if (len)
1676 buf[len - 1] = '\n';
1677
1678 return len;
1679}
1680
1681static DEVICE_ATTR(start_triggers, S_IRUGO | S_IWUSR,
1682 kbd_led_triggers_show, kbd_led_triggers_store);
1683
1684static ssize_t kbd_led_als_store(struct device *dev,
1685 struct device_attribute *attr,
1686 const char *buf, size_t count)
1687{
1688 struct kbd_state state;
1689 struct kbd_state new_state;
1690 u8 setting;
1691 int ret;
1692
1693 ret = kstrtou8(buf, 10, &setting);
1694 if (ret)
1695 return ret;
1696
1697 ret = kbd_get_state(&state);
1698 if (ret)
1699 return ret;
1700
1701 new_state = state;
1702 new_state.als_setting = setting;
1703
1704 ret = kbd_set_state_safe(&new_state, &state);
1705 if (ret)
1706 return ret;
1707
1708 return count;
1709}
1710
1711static ssize_t kbd_led_als_show(struct device *dev,
1712 struct device_attribute *attr, char *buf)
1713{
1714 struct kbd_state state;
1715 int ret;
1716
1717 ret = kbd_get_state(&state);
1718 if (ret)
1719 return ret;
1720
1721 return sprintf(buf, "%d\n", state.als_setting);
1722}
1723
1724static DEVICE_ATTR(als_setting, S_IRUGO | S_IWUSR,
1725 kbd_led_als_show, kbd_led_als_store);
1726
1727static struct attribute *kbd_led_attrs[] = {
1728 &dev_attr_stop_timeout.attr,
1729 &dev_attr_start_triggers.attr,
1730 &dev_attr_als_setting.attr,
1731 NULL,
1732};
1733ATTRIBUTE_GROUPS(kbd_led);
1734
1735static enum led_brightness kbd_led_level_get(struct led_classdev *led_cdev)
1736{
1737 int ret;
1738 u16 num;
1739 struct kbd_state state;
1740
1741 if (kbd_get_max_level()) {
1742 ret = kbd_get_state(&state);
1743 if (ret)
1744 return 0;
1745 ret = kbd_get_level(&state);
1746 if (ret < 0)
1747 return 0;
1748 return ret;
1749 }
1750
1751 if (kbd_get_valid_token_counts()) {
1752 ret = kbd_get_first_active_token_bit();
1753 if (ret < 0)
1754 return 0;
1755 for (num = kbd_token_bits; num != 0 && ret > 0; --ret)
1756 num &= num - 1; /* clear the first bit set */
1757 if (num == 0)
1758 return 0;
1759 return ffs(num) - 1;
1760 }
1761
1762 pr_warn("Keyboard brightness level control not supported\n");
1763 return 0;
1764}
1765
1766static void kbd_led_level_set(struct led_classdev *led_cdev,
1767 enum led_brightness value)
1768{
1769 struct kbd_state state;
1770 struct kbd_state new_state;
1771 u16 num;
1772
1773 if (kbd_get_max_level()) {
1774 if (kbd_get_state(&state))
1775 return;
1776 new_state = state;
1777 if (kbd_set_level(&new_state, value))
1778 return;
1779 kbd_set_state_safe(&new_state, &state);
1780 return;
1781 }
1782
1783 if (kbd_get_valid_token_counts()) {
1784 for (num = kbd_token_bits; num != 0 && value > 0; --value)
1785 num &= num - 1; /* clear the first bit set */
1786 if (num == 0)
1787 return;
1788 kbd_set_token_bit(ffs(num) - 1);
1789 return;
1790 }
1791
1792 pr_warn("Keyboard brightness level control not supported\n");
1793}
1794
1795static struct led_classdev kbd_led = {
1796 .name = "dell::kbd_backlight",
1797 .brightness_set = kbd_led_level_set,
1798 .brightness_get = kbd_led_level_get,
1799 .groups = kbd_led_groups,
1800};
1801
1802static int __init kbd_led_init(struct device *dev)
1803{
1804 kbd_init();
1805 if (!kbd_led_present)
1806 return -ENODEV;
1807 kbd_led.max_brightness = kbd_get_max_level();
1808 if (!kbd_led.max_brightness) {
1809 kbd_led.max_brightness = kbd_get_valid_token_counts();
1810 if (kbd_led.max_brightness)
1811 kbd_led.max_brightness--;
1812 }
1813 return led_classdev_register(dev, &kbd_led);
1814}
1815
1816static void brightness_set_exit(struct led_classdev *led_cdev,
1817 enum led_brightness value)
1818{
1819 /* Don't change backlight level on exit */
1820};
1821
1822static void kbd_led_exit(void)
1823{
1824 if (!kbd_led_present)
1825 return;
1826 kbd_led.brightness_set = brightness_set_exit;
1827 led_classdev_unregister(&kbd_led);
1828}
1829
1830static int __init dell_init(void) 792static int __init dell_init(void)
1831{ 793{
1832 int max_intensity = 0; 794 int max_intensity = 0;
@@ -1879,8 +841,6 @@ static int __init dell_init(void)
1879 if (quirks && quirks->touchpad_led) 841 if (quirks && quirks->touchpad_led)
1880 touchpad_led_init(&platform_device->dev); 842 touchpad_led_init(&platform_device->dev);
1881 843
1882 kbd_led_init(&platform_device->dev);
1883
1884 dell_laptop_dir = debugfs_create_dir("dell_laptop", NULL); 844 dell_laptop_dir = debugfs_create_dir("dell_laptop", NULL);
1885 if (dell_laptop_dir != NULL) 845 if (dell_laptop_dir != NULL)
1886 debugfs_create_file("rfkill", 0444, dell_laptop_dir, NULL, 846 debugfs_create_file("rfkill", 0444, dell_laptop_dir, NULL,
@@ -1948,7 +908,6 @@ static void __exit dell_exit(void)
1948 debugfs_remove_recursive(dell_laptop_dir); 908 debugfs_remove_recursive(dell_laptop_dir);
1949 if (quirks && quirks->touchpad_led) 909 if (quirks && quirks->touchpad_led)
1950 touchpad_led_exit(); 910 touchpad_led_exit();
1951 kbd_led_exit();
1952 i8042_remove_filter(dell_laptop_i8042_filter); 911 i8042_remove_filter(dell_laptop_i8042_filter);
1953 cancel_delayed_work_sync(&dell_rfkill_work); 912 cancel_delayed_work_sync(&dell_rfkill_work);
1954 backlight_device_unregister(dell_backlight_device); 913 backlight_device_unregister(dell_backlight_device);
@@ -1965,7 +924,5 @@ module_init(dell_init);
1965module_exit(dell_exit); 924module_exit(dell_exit);
1966 925
1967MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>"); 926MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
1968MODULE_AUTHOR("Gabriele Mazzotta <gabriele.mzt@gmail.com>");
1969MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>");
1970MODULE_DESCRIPTION("Dell laptop driver"); 927MODULE_DESCRIPTION("Dell laptop driver");
1971MODULE_LICENSE("GPL"); 928MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-09 11:03:04 -0500