ACPI: thinkpad-acpi: add UWB radio support
Add rfkill support for USB UWB radio devices on very recent ThinkPad laptop models. The new subdriver is moslty a trimmed down copy of the wwan subdriver. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Cc: Ivo van Doorn <IvDoorn@gmail.com> Signed-off-by: Len Brown <len.brown@intel.com>hifive-unleashed-5.1
Henrique de Moraes Holschuh
Len Brown
parent
90d9d3c79c
commit
0045c0aa7d
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@ -1413,6 +1413,24 @@ Sysfs notes:
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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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EXPERIMENTAL: UWB
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-----------------
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This feature is marked EXPERIMENTAL because it has not been extensively
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tested and validated in various ThinkPad models yet. The feature may not
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work as expected. USE WITH CAUTION! To use this feature, you need to supply
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the experimental=1 parameter when loading the module.
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sysfs rfkill class: switch "tpacpi_uwb_sw"
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This feature exports an rfkill controller for the UWB device, if one is
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present and enabled in the BIOS.
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Sysfs notes:
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rfkill controller switch "tpacpi_uwb_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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@ -169,6 +169,7 @@ enum {
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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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TPACPI_RFK_UWB_SW_ID,
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};
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/* Debugging */
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@ -261,6 +262,7 @@ static struct {
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u32 bright_16levels:1;
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u32 bright_acpimode:1;
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u32 wan:1;
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u32 uwb:1;
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u32 fan_ctrl_status_undef:1;
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u32 input_device_registered:1;
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u32 platform_drv_registered:1;
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@ -317,6 +319,8 @@ static int dbg_bluetoothemul;
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static int tpacpi_bluetooth_emulstate;
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static int dbg_wwanemul;
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static int tpacpi_wwan_emulstate;
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static int dbg_uwbemul;
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static int tpacpi_uwb_emulstate;
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#endif
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@ -967,6 +971,7 @@ 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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const bool set_default,
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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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@ -978,7 +983,7 @@ static int __init tpacpi_new_rfkill(const unsigned int id,
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printk(TPACPI_ERR
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"failed to read initial state for %s, error %d; "
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"will turn radio off\n", name, res);
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} else {
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} else if (set_default) {
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/* try to set the initial state as the default for the rfkill
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* type, since we ask the firmware to preserve it across S5 in
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* NVRAM */
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@ -1148,6 +1153,31 @@ static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
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tpacpi_driver_wwan_emulstate_show,
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tpacpi_driver_wwan_emulstate_store);
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/* uwb_emulstate ------------------------------------------------- */
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static ssize_t tpacpi_driver_uwb_emulstate_show(
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struct device_driver *drv,
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char *buf)
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{
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return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
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}
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static ssize_t tpacpi_driver_uwb_emulstate_store(
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struct device_driver *drv,
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const char *buf, size_t count)
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{
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unsigned long t;
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if (parse_strtoul(buf, 1, &t))
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return -EINVAL;
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tpacpi_uwb_emulstate = !!t;
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return count;
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}
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static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
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tpacpi_driver_uwb_emulstate_show,
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tpacpi_driver_uwb_emulstate_store);
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#endif
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/* --------------------------------------------------------------------- */
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@ -1175,6 +1205,8 @@ static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
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res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
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if (!res && dbg_wwanemul)
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res = driver_create_file(drv, &driver_attr_wwan_emulstate);
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if (!res && dbg_uwbemul)
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res = driver_create_file(drv, &driver_attr_uwb_emulstate);
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#endif
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return res;
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@ -1191,6 +1223,7 @@ static void tpacpi_remove_driver_attributes(struct device_driver *drv)
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driver_remove_file(drv, &driver_attr_wlsw_emulstate);
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driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
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driver_remove_file(drv, &driver_attr_wwan_emulstate);
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driver_remove_file(drv, &driver_attr_uwb_emulstate);
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#endif
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}
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@ -2125,6 +2158,7 @@ static struct attribute *hotkey_mask_attributes[] __initdata = {
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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 uwb_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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@ -2134,6 +2168,8 @@ static void tpacpi_send_radiosw_update(void)
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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.uwb)
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uwb_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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@ -3035,6 +3071,7 @@ static int __init bluetooth_init(struct ibm_init_struct *iibm)
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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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true,
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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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@ -3309,6 +3346,7 @@ static int __init wan_init(struct ibm_init_struct *iibm)
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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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true,
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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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@ -3365,6 +3403,162 @@ static struct ibm_struct wan_driver_data = {
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.shutdown = wan_shutdown,
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};
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/*************************************************************************
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* UWB subdriver
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*/
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enum {
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/* ACPI GUWB/SUWB bits */
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TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
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TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
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};
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static struct rfkill *tpacpi_uwb_rfkill;
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static int uwb_get_radiosw(void)
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{
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int status;
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if (!tp_features.uwb)
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return -ENODEV;
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/* WLSW overrides UWB in firmware/hardware, reflect that */
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if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
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return RFKILL_STATE_HARD_BLOCKED;
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#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
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if (dbg_uwbemul)
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return (tpacpi_uwb_emulstate) ?
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RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
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#endif
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if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
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return -EIO;
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return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
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RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
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}
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static void uwb_update_rfk(void)
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{
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int status;
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if (!tpacpi_uwb_rfkill)
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return;
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status = uwb_get_radiosw();
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if (status < 0)
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return;
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rfkill_force_state(tpacpi_uwb_rfkill, status);
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}
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static int uwb_set_radiosw(int radio_on, int update_rfk)
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{
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int status;
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if (!tp_features.uwb)
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return -ENODEV;
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/* WLSW overrides UWB in firmware/hardware, but there is no
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* reason to risk weird behaviour. */
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if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
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&& radio_on)
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return -EPERM;
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#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
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if (dbg_uwbemul) {
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tpacpi_uwb_emulstate = !!radio_on;
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if (update_rfk)
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uwb_update_rfk();
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return 0;
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}
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#endif
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status = (radio_on) ? TP_ACPI_UWB_RADIOSSW : 0;
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if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
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return -EIO;
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if (update_rfk)
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uwb_update_rfk();
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return 0;
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}
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/* --------------------------------------------------------------------- */
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static int tpacpi_uwb_rfk_get(void *data, enum rfkill_state *state)
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{
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int uwbs = uwb_get_radiosw();
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if (uwbs < 0)
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return uwbs;
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*state = uwbs;
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return 0;
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}
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static int tpacpi_uwb_rfk_set(void *data, enum rfkill_state state)
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{
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return uwb_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
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}
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static void uwb_exit(void)
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{
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if (tpacpi_uwb_rfkill)
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rfkill_unregister(tpacpi_uwb_rfkill);
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}
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static int __init uwb_init(struct ibm_init_struct *iibm)
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{
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int res;
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int status = 0;
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vdbg_printk(TPACPI_DBG_INIT, "initializing uwb subdriver\n");
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TPACPI_ACPIHANDLE_INIT(hkey);
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tp_features.uwb = hkey_handle &&
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acpi_evalf(hkey_handle, &status, "GUWB", "qd");
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vdbg_printk(TPACPI_DBG_INIT, "uwb is %s, status 0x%02x\n",
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str_supported(tp_features.uwb),
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status);
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#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
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if (dbg_uwbemul) {
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tp_features.uwb = 1;
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printk(TPACPI_INFO
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"uwb switch emulation enabled\n");
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} else
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#endif
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if (tp_features.uwb &&
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!(status & TP_ACPI_UWB_HWPRESENT)) {
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/* no uwb hardware present in system */
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tp_features.uwb = 0;
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dbg_printk(TPACPI_DBG_INIT,
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"uwb hardware not installed\n");
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}
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if (!tp_features.uwb)
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return 1;
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res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
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&tpacpi_uwb_rfkill,
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RFKILL_TYPE_UWB,
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"tpacpi_uwb_sw",
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false,
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tpacpi_uwb_rfk_set,
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tpacpi_uwb_rfk_get);
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return res;
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}
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static struct ibm_struct uwb_driver_data = {
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.name = "uwb",
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.exit = uwb_exit,
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.flags.experimental = 1,
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};
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/*************************************************************************
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* Video subdriver
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*/
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@ -6830,6 +7024,10 @@ static struct ibm_init_struct ibms_init[] __initdata = {
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.init = wan_init,
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.data = &wan_driver_data,
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},
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{
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.init = uwb_init,
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.data = &uwb_driver_data,
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},
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#ifdef CONFIG_THINKPAD_ACPI_VIDEO
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{
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.init = video_init,
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@ -6986,6 +7184,12 @@ MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
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module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
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MODULE_PARM_DESC(wwan_state,
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"Initial state of the emulated WWAN switch");
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module_param(dbg_uwbemul, uint, 0);
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MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
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module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
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MODULE_PARM_DESC(uwb_state,
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"Initial state of the emulated UWB switch");
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#endif
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static void thinkpad_acpi_module_exit(void)
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