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https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
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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>
This commit is contained in:
Henrique de Moraes Holschuh
Len Brown
parent
60201732f0
commit
f21179a47f
2 changed files with 96 additions and 15 deletions
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@ -920,7 +920,7 @@ The available commands are:
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echo '<LED number> off' >/proc/acpi/ibm/led
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echo '<LED number> blink' >/proc/acpi/ibm/led
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The <LED number> range is 0 to 7. The set of LEDs that can be
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The <LED number> range is 0 to 15. The set of LEDs that can be
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controlled varies from model to model. Here is the common ThinkPad
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mapping:
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@ -932,6 +932,11 @@ mapping:
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5 - UltraBase battery slot
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6 - (unknown)
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7 - standby
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8 - dock status 1
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9 - dock status 2
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10, 11 - (unknown)
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12 - thinkvantage
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13, 14, 15 - (unknown)
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All of the above can be turned on and off and can be made to blink.
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@ -940,10 +945,12 @@ sysfs notes:
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The ThinkPad LED sysfs interface is described in detail by the LED class
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documentation, in Documentation/leds-class.txt.
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The leds are named (in LED ID order, from 0 to 7):
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The LEDs are named (in LED ID order, from 0 to 12):
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"tpacpi::power", "tpacpi:orange:batt", "tpacpi:green:batt",
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"tpacpi::dock_active", "tpacpi::bay_active", "tpacpi::dock_batt",
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"tpacpi::unknown_led", "tpacpi::standby".
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"tpacpi::unknown_led", "tpacpi::standby", "tpacpi::dock_status1",
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"tpacpi::dock_status2", "tpacpi::unknown_led2", "tpacpi::unknown_led3",
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"tpacpi::thinkvantage".
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Due to limitations in the sysfs LED class, if the status of the LED
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indicators cannot be read due to an error, thinkpad-acpi will report it as
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@ -958,6 +965,12 @@ ThinkPad indicator LED should blink in hardware accelerated mode, use the
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"timer" trigger, and leave the delay_on and delay_off parameters set to
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zero (to request hardware acceleration autodetection).
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LEDs that are known not to exist in a given ThinkPad model are not
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made available through the sysfs interface. If you have a dock and you
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notice there are LEDs listed for your ThinkPad that do not exist (and
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are not in the dock), or if you notice that there are missing LEDs,
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a report to ibm-acpi-devel@lists.sourceforge.net is appreciated.
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ACPI sounds -- /proc/acpi/ibm/beep
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----------------------------------
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@ -1555,3 +1568,7 @@ Sysfs interface changelog:
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0x020300: hotkey enable/disable support removed, attributes
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hotkey_bios_enabled and hotkey_enable deprecated and
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marked for removal.
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0x020400: Marker for 16 LEDs support. Also, LEDs that are known
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to not exist in a given model are not registered with
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the LED sysfs class anymore.
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@ -22,7 +22,7 @@
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*/
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#define TPACPI_VERSION "0.23"
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#define TPACPI_SYSFS_VERSION 0x020300
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#define TPACPI_SYSFS_VERSION 0x020400
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/*
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* Changelog:
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@ -4815,7 +4815,7 @@ TPACPI_HANDLE(led, ec, "SLED", /* 570 */
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"LED", /* all others */
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); /* R30, R31 */
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#define TPACPI_LED_NUMLEDS 8
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#define TPACPI_LED_NUMLEDS 16
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static struct tpacpi_led_classdev *tpacpi_leds;
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static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
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static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
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@ -4828,15 +4828,20 @@ static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
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"tpacpi::dock_batt",
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"tpacpi::unknown_led",
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"tpacpi::standby",
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"tpacpi::dock_status1",
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"tpacpi::dock_status2",
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"tpacpi::unknown_led2",
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"tpacpi::unknown_led3",
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"tpacpi::thinkvantage",
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};
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#define TPACPI_SAFE_LEDS 0x0081U
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#define TPACPI_SAFE_LEDS 0x1081U
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static inline bool tpacpi_is_led_restricted(const unsigned int led)
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{
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#ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
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return false;
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#else
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return (TPACPI_SAFE_LEDS & (1 << led)) == 0;
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return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
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#endif
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}
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@ -4998,6 +5003,10 @@ static int __init tpacpi_init_led(unsigned int led)
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tpacpi_leds[led].led = led;
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/* LEDs with no name don't get registered */
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if (!tpacpi_led_names[led])
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return 0;
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tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
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tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
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if (led_supported == TPACPI_LED_570)
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@ -5016,10 +5025,59 @@ static int __init tpacpi_init_led(unsigned int led)
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return rc;
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}
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static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
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TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
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TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
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TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
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TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
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TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
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TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
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TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
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TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
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TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
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TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
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TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
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TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
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TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
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TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
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TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
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TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
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TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
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TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
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TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
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TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
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/* (1) - may have excess leds enabled on MSB */
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/* Defaults (order matters, keep last, don't reorder!) */
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{ /* Lenovo */
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.vendor = PCI_VENDOR_ID_LENOVO,
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.bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
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.quirks = 0x1fffU,
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},
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{ /* IBM ThinkPads with no EC version string */
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.vendor = PCI_VENDOR_ID_IBM,
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.bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
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.quirks = 0x00ffU,
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},
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{ /* IBM ThinkPads with EC version string */
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.vendor = PCI_VENDOR_ID_IBM,
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.bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
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.quirks = 0x00bfU,
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},
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};
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#undef TPACPI_LEDQ_IBM
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#undef TPACPI_LEDQ_LNV
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static int __init led_init(struct ibm_init_struct *iibm)
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{
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unsigned int i;
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int rc;
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unsigned long useful_leds;
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vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
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@ -5041,6 +5099,9 @@ static int __init led_init(struct ibm_init_struct *iibm)
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vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
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str_supported(led_supported), led_supported);
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if (led_supported == TPACPI_LED_NONE)
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return 1;
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tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
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GFP_KERNEL);
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if (!tpacpi_leds) {
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@ -5048,8 +5109,12 @@ static int __init led_init(struct ibm_init_struct *iibm)
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return -ENOMEM;
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}
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useful_leds = tpacpi_check_quirks(led_useful_qtable,
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ARRAY_SIZE(led_useful_qtable));
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for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
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if (!tpacpi_is_led_restricted(i)) {
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if (!tpacpi_is_led_restricted(i) &&
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test_bit(i, &useful_leds)) {
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rc = tpacpi_init_led(i);
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if (rc < 0) {
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led_exit();
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@ -5059,12 +5124,11 @@ static int __init led_init(struct ibm_init_struct *iibm)
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}
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#ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
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if (led_supported != TPACPI_LED_NONE)
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printk(TPACPI_NOTICE
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"warning: userspace override of important "
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"firmware LEDs is enabled\n");
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printk(TPACPI_NOTICE
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"warning: userspace override of important "
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"firmware LEDs is enabled\n");
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#endif
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return (led_supported != TPACPI_LED_NONE)? 0 : 1;
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return 0;
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}
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#define str_led_status(s) \
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@ -5094,7 +5158,7 @@ static int led_read(char *p)
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}
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len += sprintf(p + len, "commands:\t"
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"<led> on, <led> off, <led> blink (<led> is 0-7)\n");
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"<led> on, <led> off, <led> blink (<led> is 0-15)\n");
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return len;
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}
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@ -5109,7 +5173,7 @@ static int led_write(char *buf)
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return -ENODEV;
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while ((cmd = next_cmd(&buf))) {
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if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
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if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
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return -EINVAL;
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if (strstr(cmd, "off")) {
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