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ACPI: thinkpad-acpi: add bluetooth and WWAN rfkill support
Add a read/write rfkill interface to the bluetooth radio switch on the bluetooth submodule, and one for the wireless wan radio switch to the wan submodule. Since rfkill does care for when a switch changes state, use WLSW notifications to also check if the WWAN or Bluetooth switches did not change state (due to them being slaves of WLSW in firmware/hardware, but that reality not being always properly exported by the thinkpad firmware). Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Cc: Ivo van Doorn <IvDoorn@gmail.com> Cc: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Henrique de Moraes Holschuh
parent
133ec3bd3a
commit
0e74dc2646
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@ -621,7 +621,8 @@ Bluetooth
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---------
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procfs: /proc/acpi/ibm/bluetooth
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sysfs device attribute: bluetooth_enable
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sysfs device attribute: bluetooth_enable (deprecated)
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sysfs rfkill class: switch "tpacpi_bluetooth_sw"
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This feature shows the presence and current state of a ThinkPad
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Bluetooth device in the internal ThinkPad CDC slot.
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@ -643,8 +644,12 @@ Sysfs notes:
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0: disables Bluetooth / Bluetooth is disabled
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1: enables Bluetooth / Bluetooth is enabled.
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Note: this interface will be probably be superseded by the
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generic rfkill class, so it is NOT to be considered stable yet.
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Note: this interface has been superseded by the generic rfkill
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class. It has been deprecated, and it will be removed in year
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2010.
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rfkill controller switch "tpacpi_bluetooth_sw": refer to
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Documentation/rfkill.txt for details.
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Video output control -- /proc/acpi/ibm/video
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--------------------------------------------
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@ -1374,7 +1379,8 @@ EXPERIMENTAL: WAN
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-----------------
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procfs: /proc/acpi/ibm/wan
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sysfs device attribute: wwan_enable
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sysfs device attribute: wwan_enable (deprecated)
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sysfs rfkill class: switch "tpacpi_wwan_sw"
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This feature is marked EXPERIMENTAL because the implementation
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directly accesses hardware registers and may not work as expected. USE
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@ -1404,8 +1410,12 @@ Sysfs notes:
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0: disables WWAN card / WWAN card is disabled
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1: enables WWAN card / WWAN card is enabled.
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Note: this interface will be probably be superseded by the
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generic rfkill class, so it is NOT to be considered stable yet.
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Note: this interface has been superseded by the generic rfkill
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class. It has been deprecated, and it will be removed in year
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2010.
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rfkill controller switch "tpacpi_wwan_sw": refer to
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Documentation/rfkill.txt for details.
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Multiple Commands, Module Parameters
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------------------------------------
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@ -279,6 +279,8 @@ config THINKPAD_ACPI
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select INPUT
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select NEW_LEDS
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select LEDS_CLASS
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select NET
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select RFKILL
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---help---
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This is a driver for the IBM and Lenovo ThinkPad laptops. It adds
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support for Fn-Fx key combinations, Bluetooth control, video
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@ -68,6 +68,7 @@
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#include <linux/hwmon-sysfs.h>
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#include <linux/input.h>
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#include <linux/leds.h>
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#include <linux/rfkill.h>
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#include <asm/uaccess.h>
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#include <linux/dmi.h>
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@ -144,6 +145,12 @@ enum {
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#define TPACPI_MAX_ACPI_ARGS 3
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/* rfkill switches */
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enum {
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TPACPI_RFK_BLUETOOTH_SW_ID = 0,
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TPACPI_RFK_WWAN_SW_ID,
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};
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/* Debugging */
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#define TPACPI_LOG TPACPI_FILE ": "
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#define TPACPI_ERR KERN_ERR TPACPI_LOG
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@ -905,6 +912,43 @@ static int __init tpacpi_check_std_acpi_brightness_support(void)
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return 0;
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}
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static int __init tpacpi_new_rfkill(const unsigned int id,
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struct rfkill **rfk,
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const enum rfkill_type rfktype,
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const char *name,
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int (*toggle_radio)(void *, enum rfkill_state),
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int (*get_state)(void *, enum rfkill_state *))
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{
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int res;
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enum rfkill_state initial_state;
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*rfk = rfkill_allocate(&tpacpi_pdev->dev, rfktype);
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if (!*rfk) {
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printk(TPACPI_ERR
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"failed to allocate memory for rfkill class\n");
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return -ENOMEM;
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}
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(*rfk)->name = name;
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(*rfk)->get_state = get_state;
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(*rfk)->toggle_radio = toggle_radio;
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if (!get_state(NULL, &initial_state))
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(*rfk)->state = initial_state;
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res = rfkill_register(*rfk);
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if (res < 0) {
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printk(TPACPI_ERR
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"failed to register %s rfkill switch: %d\n",
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name, res);
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rfkill_free(*rfk);
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*rfk = NULL;
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return res;
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}
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return 0;
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}
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/*************************************************************************
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* thinkpad-acpi driver attributes
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*/
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@ -1906,10 +1950,18 @@ static struct attribute *hotkey_mask_attributes[] __initdata = {
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&dev_attr_hotkey_wakeup_hotunplug_complete.attr,
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};
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static void bluetooth_update_rfk(void);
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static void wan_update_rfk(void);
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static void tpacpi_send_radiosw_update(void)
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{
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int wlsw;
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/* Sync these BEFORE sending any rfkill events */
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if (tp_features.bluetooth)
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bluetooth_update_rfk();
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if (tp_features.wan)
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wan_update_rfk();
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if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
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mutex_lock(&tpacpi_inputdev_send_mutex);
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@ -2581,6 +2633,8 @@ enum {
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TP_ACPI_BLUETOOTH_UNK = 0x04, /* unknown function */
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};
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static struct rfkill *tpacpi_bluetooth_rfkill;
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static int bluetooth_get_radiosw(void)
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{
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int status;
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@ -2590,15 +2644,29 @@ static int bluetooth_get_radiosw(void)
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/* WLSW overrides bluetooth in firmware/hardware, reflect that */
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if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
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return 0;
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return RFKILL_STATE_HARD_BLOCKED;
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if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
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return -EIO;
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return (status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0;
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return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
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RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
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}
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static int bluetooth_set_radiosw(int radio_on)
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static void bluetooth_update_rfk(void)
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{
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int status;
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if (!tpacpi_bluetooth_rfkill)
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return;
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status = bluetooth_get_radiosw();
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if (status < 0)
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return;
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rfkill_force_state(tpacpi_bluetooth_rfkill, status);
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}
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static int bluetooth_set_radiosw(int radio_on, int update_rfk)
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{
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int status;
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@ -2620,6 +2688,9 @@ static int bluetooth_set_radiosw(int radio_on)
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if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
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return -EIO;
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if (update_rfk)
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bluetooth_update_rfk();
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return 0;
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}
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@ -2634,7 +2705,8 @@ static ssize_t bluetooth_enable_show(struct device *dev,
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if (status < 0)
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return status;
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return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
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return snprintf(buf, PAGE_SIZE, "%d\n",
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(status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
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}
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static ssize_t bluetooth_enable_store(struct device *dev,
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@ -2647,7 +2719,7 @@ static ssize_t bluetooth_enable_store(struct device *dev,
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if (parse_strtoul(buf, 1, &t))
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return -EINVAL;
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res = bluetooth_set_radiosw(t);
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res = bluetooth_set_radiosw(t, 1);
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return (res) ? res : count;
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}
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@ -2667,8 +2739,27 @@ static const struct attribute_group bluetooth_attr_group = {
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.attrs = bluetooth_attributes,
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};
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static int tpacpi_bluetooth_rfk_get(void *data, enum rfkill_state *state)
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{
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int bts = bluetooth_get_radiosw();
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if (bts < 0)
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return bts;
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*state = bts;
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return 0;
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}
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static int tpacpi_bluetooth_rfk_set(void *data, enum rfkill_state state)
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{
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return bluetooth_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
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}
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static void bluetooth_exit(void)
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{
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if (tpacpi_bluetooth_rfkill)
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rfkill_unregister(tpacpi_bluetooth_rfkill);
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sysfs_remove_group(&tpacpi_pdev->dev.kobj,
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&bluetooth_attr_group);
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}
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@ -2699,14 +2790,26 @@ static int __init bluetooth_init(struct ibm_init_struct *iibm)
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"bluetooth hardware not installed\n");
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}
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if (tp_features.bluetooth) {
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res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
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if (!tp_features.bluetooth)
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return 1;
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res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
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&bluetooth_attr_group);
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if (res)
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return res;
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if (res)
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return res;
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res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
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&tpacpi_bluetooth_rfkill,
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RFKILL_TYPE_BLUETOOTH,
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"tpacpi_bluetooth_sw",
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tpacpi_bluetooth_rfk_set,
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tpacpi_bluetooth_rfk_get);
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if (res) {
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bluetooth_exit();
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return res;
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}
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return (tp_features.bluetooth)? 0 : 1;
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return 0;
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}
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/* procfs -------------------------------------------------------------- */
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@ -2719,7 +2822,8 @@ static int bluetooth_read(char *p)
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len += sprintf(p + len, "status:\t\tnot supported\n");
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else {
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len += sprintf(p + len, "status:\t\t%s\n",
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(status)? "enabled" : "disabled");
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(status == RFKILL_STATE_UNBLOCKED) ?
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"enabled" : "disabled");
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len += sprintf(p + len, "commands:\tenable, disable\n");
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}
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@ -2735,9 +2839,9 @@ static int bluetooth_write(char *buf)
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while ((cmd = next_cmd(&buf))) {
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if (strlencmp(cmd, "enable") == 0) {
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bluetooth_set_radiosw(1);
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bluetooth_set_radiosw(1, 1);
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} else if (strlencmp(cmd, "disable") == 0) {
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bluetooth_set_radiosw(0);
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bluetooth_set_radiosw(0, 1);
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} else
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return -EINVAL;
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}
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@ -2763,6 +2867,8 @@ enum {
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TP_ACPI_WANCARD_UNK = 0x04, /* unknown function */
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};
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static struct rfkill *tpacpi_wan_rfkill;
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static int wan_get_radiosw(void)
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{
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int status;
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@ -2772,15 +2878,29 @@ static int wan_get_radiosw(void)
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/* WLSW overrides WWAN in firmware/hardware, reflect that */
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if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
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return 0;
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return RFKILL_STATE_HARD_BLOCKED;
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if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
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return -EIO;
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return (status & TP_ACPI_WANCARD_RADIOSSW) != 0;
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return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
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RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
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}
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static int wan_set_radiosw(int radio_on)
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static void wan_update_rfk(void)
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{
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int status;
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if (!tpacpi_wan_rfkill)
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return;
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status = wan_get_radiosw();
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if (status < 0)
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return;
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rfkill_force_state(tpacpi_wan_rfkill, status);
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}
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static int wan_set_radiosw(int radio_on, int update_rfk)
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{
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int status;
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@ -2802,6 +2922,9 @@ static int wan_set_radiosw(int radio_on)
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if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
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return -EIO;
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if (update_rfk)
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wan_update_rfk();
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return 0;
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}
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@ -2816,7 +2939,8 @@ static ssize_t wan_enable_show(struct device *dev,
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if (status < 0)
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return status;
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return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
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return snprintf(buf, PAGE_SIZE, "%d\n",
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(status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
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}
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static ssize_t wan_enable_store(struct device *dev,
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@ -2829,7 +2953,7 @@ static ssize_t wan_enable_store(struct device *dev,
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if (parse_strtoul(buf, 1, &t))
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return -EINVAL;
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res = wan_set_radiosw(t);
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res = wan_set_radiosw(t, 1);
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return (res) ? res : count;
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}
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@ -2849,8 +2973,27 @@ static const struct attribute_group wan_attr_group = {
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.attrs = wan_attributes,
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};
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static int tpacpi_wan_rfk_get(void *data, enum rfkill_state *state)
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{
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int wans = wan_get_radiosw();
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if (wans < 0)
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return wans;
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*state = wans;
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return 0;
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}
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static int tpacpi_wan_rfk_set(void *data, enum rfkill_state state)
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{
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return wan_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
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}
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static void wan_exit(void)
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{
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if (tpacpi_wan_rfkill)
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rfkill_unregister(tpacpi_wan_rfkill);
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sysfs_remove_group(&tpacpi_pdev->dev.kobj,
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&wan_attr_group);
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}
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@ -2879,14 +3022,26 @@ static int __init wan_init(struct ibm_init_struct *iibm)
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"wan hardware not installed\n");
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}
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if (tp_features.wan) {
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res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
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if (!tp_features.wan)
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return 1;
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res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
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&wan_attr_group);
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if (res)
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return res;
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if (res)
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return res;
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res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
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&tpacpi_wan_rfkill,
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RFKILL_TYPE_WWAN,
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"tpacpi_wwan_sw",
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tpacpi_wan_rfk_set,
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tpacpi_wan_rfk_get);
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if (res) {
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wan_exit();
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return res;
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}
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return (tp_features.wan)? 0 : 1;
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return 0;
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}
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/* procfs -------------------------------------------------------------- */
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@ -2899,7 +3054,8 @@ static int wan_read(char *p)
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len += sprintf(p + len, "status:\t\tnot supported\n");
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else {
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len += sprintf(p + len, "status:\t\t%s\n",
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(status)? "enabled" : "disabled");
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(status == RFKILL_STATE_UNBLOCKED) ?
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"enabled" : "disabled");
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len += sprintf(p + len, "commands:\tenable, disable\n");
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}
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@ -2915,9 +3071,9 @@ static int wan_write(char *buf)
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while ((cmd = next_cmd(&buf))) {
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if (strlencmp(cmd, "enable") == 0) {
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wan_set_radiosw(1);
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wan_set_radiosw(1, 1);
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} else if (strlencmp(cmd, "disable") == 0) {
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wan_set_radiosw(0);
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wan_set_radiosw(0, 1);
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} else
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return -EINVAL;
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}
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