thinkpad-acpi: enhance led support
Add support for extra LEDs on recent ThinkPads, and avoid registering
with the led class the LEDs which are not available for a given
ThinkPad model.
All non-restricted LEDs are always available through the procfs
interface, as the firmware doesn't care if an attempt is made to
access an invalid LED.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/Documentation/laptops/thinkpad-acpi.txt b/Documentation/laptops/thinkpad-acpi.txt
index e7e9a690..88fc066 100644
--- a/Documentation/laptops/thinkpad-acpi.txt
+++ b/Documentation/laptops/thinkpad-acpi.txt
@@ -920,7 +920,7 @@
echo '<LED number> off' >/proc/acpi/ibm/led
echo '<LED number> blink' >/proc/acpi/ibm/led
-The <LED number> range is 0 to 7. The set of LEDs that can be
+The <LED number> range is 0 to 15. The set of LEDs that can be
controlled varies from model to model. Here is the common ThinkPad
mapping:
@@ -932,6 +932,11 @@
5 - UltraBase battery slot
6 - (unknown)
7 - standby
+ 8 - dock status 1
+ 9 - dock status 2
+ 10, 11 - (unknown)
+ 12 - thinkvantage
+ 13, 14, 15 - (unknown)
All of the above can be turned on and off and can be made to blink.
@@ -940,10 +945,12 @@
The ThinkPad LED sysfs interface is described in detail by the LED class
documentation, in Documentation/leds-class.txt.
-The leds are named (in LED ID order, from 0 to 7):
+The LEDs are named (in LED ID order, from 0 to 12):
"tpacpi::power", "tpacpi:orange:batt", "tpacpi:green:batt",
"tpacpi::dock_active", "tpacpi::bay_active", "tpacpi::dock_batt",
-"tpacpi::unknown_led", "tpacpi::standby".
+"tpacpi::unknown_led", "tpacpi::standby", "tpacpi::dock_status1",
+"tpacpi::dock_status2", "tpacpi::unknown_led2", "tpacpi::unknown_led3",
+"tpacpi::thinkvantage".
Due to limitations in the sysfs LED class, if the status of the LED
indicators cannot be read due to an error, thinkpad-acpi will report it as
@@ -958,6 +965,12 @@
"timer" trigger, and leave the delay_on and delay_off parameters set to
zero (to request hardware acceleration autodetection).
+LEDs that are known not to exist in a given ThinkPad model are not
+made available through the sysfs interface. If you have a dock and you
+notice there are LEDs listed for your ThinkPad that do not exist (and
+are not in the dock), or if you notice that there are missing LEDs,
+a report to ibm-acpi-devel@lists.sourceforge.net is appreciated.
+
ACPI sounds -- /proc/acpi/ibm/beep
----------------------------------
@@ -1555,3 +1568,7 @@
0x020300: hotkey enable/disable support removed, attributes
hotkey_bios_enabled and hotkey_enable deprecated and
marked for removal.
+
+0x020400: Marker for 16 LEDs support. Also, LEDs that are known
+ to not exist in a given model are not registered with
+ the LED sysfs class anymore.
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index da739d5..06c7c03 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -22,7 +22,7 @@
*/
#define TPACPI_VERSION "0.23"
-#define TPACPI_SYSFS_VERSION 0x020300
+#define TPACPI_SYSFS_VERSION 0x020400
/*
* Changelog:
@@ -4815,7 +4815,7 @@
"LED", /* all others */
); /* R30, R31 */
-#define TPACPI_LED_NUMLEDS 8
+#define TPACPI_LED_NUMLEDS 16
static struct tpacpi_led_classdev *tpacpi_leds;
static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
@@ -4828,15 +4828,20 @@
"tpacpi::dock_batt",
"tpacpi::unknown_led",
"tpacpi::standby",
+ "tpacpi::dock_status1",
+ "tpacpi::dock_status2",
+ "tpacpi::unknown_led2",
+ "tpacpi::unknown_led3",
+ "tpacpi::thinkvantage",
};
-#define TPACPI_SAFE_LEDS 0x0081U
+#define TPACPI_SAFE_LEDS 0x1081U
static inline bool tpacpi_is_led_restricted(const unsigned int led)
{
#ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
return false;
#else
- return (TPACPI_SAFE_LEDS & (1 << led)) == 0;
+ return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
#endif
}
@@ -4998,6 +5003,10 @@
tpacpi_leds[led].led = led;
+ /* LEDs with no name don't get registered */
+ if (!tpacpi_led_names[led])
+ return 0;
+
tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
if (led_supported == TPACPI_LED_570)
@@ -5016,10 +5025,59 @@
return rc;
}
+static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
+ TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
+ TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
+ TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
+
+ TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
+ TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
+ TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
+ TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
+ TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
+ TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
+ TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
+ TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
+
+ TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
+ TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
+ TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
+ TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
+ TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
+
+ TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
+ TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
+ TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
+ TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
+
+ /* (1) - may have excess leds enabled on MSB */
+
+ /* Defaults (order matters, keep last, don't reorder!) */
+ { /* Lenovo */
+ .vendor = PCI_VENDOR_ID_LENOVO,
+ .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
+ .quirks = 0x1fffU,
+ },
+ { /* IBM ThinkPads with no EC version string */
+ .vendor = PCI_VENDOR_ID_IBM,
+ .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
+ .quirks = 0x00ffU,
+ },
+ { /* IBM ThinkPads with EC version string */
+ .vendor = PCI_VENDOR_ID_IBM,
+ .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
+ .quirks = 0x00bfU,
+ },
+};
+
+#undef TPACPI_LEDQ_IBM
+#undef TPACPI_LEDQ_LNV
+
static int __init led_init(struct ibm_init_struct *iibm)
{
unsigned int i;
int rc;
+ unsigned long useful_leds;
vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
@@ -5041,6 +5099,9 @@
vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
str_supported(led_supported), led_supported);
+ if (led_supported == TPACPI_LED_NONE)
+ return 1;
+
tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
GFP_KERNEL);
if (!tpacpi_leds) {
@@ -5048,8 +5109,12 @@
return -ENOMEM;
}
+ useful_leds = tpacpi_check_quirks(led_useful_qtable,
+ ARRAY_SIZE(led_useful_qtable));
+
for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
- if (!tpacpi_is_led_restricted(i)) {
+ if (!tpacpi_is_led_restricted(i) &&
+ test_bit(i, &useful_leds)) {
rc = tpacpi_init_led(i);
if (rc < 0) {
led_exit();
@@ -5059,12 +5124,11 @@
}
#ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
- if (led_supported != TPACPI_LED_NONE)
- printk(TPACPI_NOTICE
- "warning: userspace override of important "
- "firmware LEDs is enabled\n");
+ printk(TPACPI_NOTICE
+ "warning: userspace override of important "
+ "firmware LEDs is enabled\n");
#endif
- return (led_supported != TPACPI_LED_NONE)? 0 : 1;
+ return 0;
}
#define str_led_status(s) \
@@ -5094,7 +5158,7 @@
}
len += sprintf(p + len, "commands:\t"
- "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
+ "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
return len;
}
@@ -5109,7 +5173,7 @@
return -ENODEV;
while ((cmd = next_cmd(&buf))) {
- if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
+ if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
return -EINVAL;
if (strstr(cmd, "off")) {