+ * UWB subdriver
+ */
+
+enum {
+ /* ACPI GUWB/SUWB bits */
+ TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */
+ TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
+};
+
+static struct rfkill *tpacpi_uwb_rfkill;
+
+static int uwb_get_radiosw(void)
+{
+ int status;
+
+ if (!tp_features.uwb)
+ return -ENODEV;
+
+ /* WLSW overrides UWB in firmware/hardware, reflect that */
+ if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
+ return RFKILL_STATE_HARD_BLOCKED;
+
+#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
+ if (dbg_uwbemul)
+ return (tpacpi_uwb_emulstate) ?
+ RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
+#endif
+
+ if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
+ return -EIO;
+
+ return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
+ RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
+}
+
+static void uwb_update_rfk(void)
+{
+ int status;
+
+ if (!tpacpi_uwb_rfkill)
+ return;
+
+ status = uwb_get_radiosw();
+ if (status < 0)
+ return;
+ rfkill_force_state(tpacpi_uwb_rfkill, status);
+}
+
+static int uwb_set_radiosw(int radio_on, int update_rfk)
+{
+ int status;
+
+ if (!tp_features.uwb)
+ return -ENODEV;
+
+ /* WLSW overrides UWB in firmware/hardware, but there is no
+ * reason to risk weird behaviour. */
+ if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
+ && radio_on)
+ return -EPERM;
+
+#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
+ if (dbg_uwbemul) {
+ tpacpi_uwb_emulstate = !!radio_on;
+ if (update_rfk)
+ uwb_update_rfk();
+ return 0;
+ }
+#endif
+
+ status = (radio_on) ? TP_ACPI_UWB_RADIOSSW : 0;
+ if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
+ return -EIO;
+
+ if (update_rfk)
+ uwb_update_rfk();
+
+ return 0;
+}
+
+/* --------------------------------------------------------------------- */
+
+static int tpacpi_uwb_rfk_get(void *data, enum rfkill_state *state)
+{
+ int uwbs = uwb_get_radiosw();
+
+ if (uwbs < 0)
+ return uwbs;
+
+ *state = uwbs;
+ return 0;
+}
+
+static int tpacpi_uwb_rfk_set(void *data, enum rfkill_state state)
+{
+ return uwb_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
+}
+
+static void uwb_exit(void)
+{
+ if (tpacpi_uwb_rfkill)
+ rfkill_unregister(tpacpi_uwb_rfkill);
+}
+
+static int __init uwb_init(struct ibm_init_struct *iibm)
+{
+ int res;
+ int status = 0;
+
+ vdbg_printk(TPACPI_DBG_INIT, "initializing uwb subdriver\n");
+
+ TPACPI_ACPIHANDLE_INIT(hkey);
+
+ tp_features.uwb = hkey_handle &&
+ acpi_evalf(hkey_handle, &status, "GUWB", "qd");
+
+ vdbg_printk(TPACPI_DBG_INIT, "uwb is %s, status 0x%02x\n",
+ str_supported(tp_features.uwb),
+ status);
+
+#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
+ if (dbg_uwbemul) {
+ tp_features.uwb = 1;
+ printk(TPACPI_INFO
+ "uwb switch emulation enabled\n");
+ } else
+#endif
+ if (tp_features.uwb &&
+ !(status & TP_ACPI_UWB_HWPRESENT)) {
+ /* no uwb hardware present in system */
+ tp_features.uwb = 0;
+ dbg_printk(TPACPI_DBG_INIT,
+ "uwb hardware not installed\n");
+ }
+
+ if (!tp_features.uwb)
+ return 1;
+
+ res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
+ &tpacpi_uwb_rfkill,
+ RFKILL_TYPE_UWB,
+ "tpacpi_uwb_sw",
+ false,
+ tpacpi_uwb_rfk_set,
+ tpacpi_uwb_rfk_get);
+
+ return res;
+}
+
+static struct ibm_struct uwb_driver_data = {
+ .name = "uwb",
+ .exit = uwb_exit,
+ .flags.experimental = 1,
+};
+
+/*************************************************************************