iwlwifi: hook iwlwifi with Linux rfkill

This patch hook IWL with Linux rfkill.

Signed-off-by: Mohamed Abbas <mabbas@linux.intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl-rfkill.c

@@ -0,0 +1,174 @@
+/******************************************************************************
+ *
+ * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
+ *
+ * Portions of this file are derived from the ipw3945 project, as well
+ * as portions of the ieee80211 subsystem header files.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called LICENSE.
+ *
+ * Contact Information:
+ * James P. Ketrenos <ipw2100-admin@linux.intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *****************************************************************************/
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/init.h>
+
+#include <net/mac80211.h>
+
+#include "iwl-eeprom.h"
+#include "iwl-core.h"
+#include "iwl-4965.h"
+#include "iwl-helpers.h"
+
+
+static inline int iwl_is_rfkill(struct iwl_priv *priv)
+{
+	return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
+		test_bit(STATUS_RF_KILL_SW, &priv->status);
+}
+
+
+/* software rf-kill from user */
+static int iwl_rfkill_soft_rf_kill(void *data, enum rfkill_state state)
+{
+	struct iwl_priv *priv = data;
+	int err = 0;
+
+	if (!priv->rfkill_mngr.rfkill)
+		return 0;
+
+	IWL_DEBUG_RF_KILL("we recieved soft RFKILL set to state %d\n", state);
+	mutex_lock(&priv->mutex);
+
+	switch (state) {
+	case RFKILL_STATE_ON:
+		priv->cfg->ops->lib->radio_kill_sw(priv, 0);
+		/* if HW rf-kill is set dont allow ON state */
+		if (iwl_is_rfkill(priv))
+			err = -EBUSY;
+		break;
+	case RFKILL_STATE_OFF:
+		priv->cfg->ops->lib->radio_kill_sw(priv, 1);
+		if (!iwl_is_rfkill(priv))
+			err = -EBUSY;
+		break;
+	}
+	mutex_unlock(&priv->mutex);
+
+	return err;
+}
+
+int iwl_rfkill_init(struct iwl_priv *priv)
+{
+	struct device *device = wiphy_dev(priv->hw->wiphy);
+	int ret = 0;
+
+	BUG_ON(device == NULL);
+
+	priv->rfkill_mngr.rfkill = rfkill_allocate(device, RFKILL_TYPE_WLAN);
+	if (!priv->rfkill_mngr.rfkill) {
+		ret = -ENOMEM;
+		goto error;
+	}
+
+	priv->rfkill_mngr.rfkill->name = priv->cfg->name;
+	priv->rfkill_mngr.rfkill->data = priv;
+	priv->rfkill_mngr.rfkill->state = RFKILL_STATE_ON;
+	priv->rfkill_mngr.rfkill->toggle_radio = iwl_rfkill_soft_rf_kill;
+	priv->rfkill_mngr.rfkill->user_claim_unsupported = 1;
+
+	priv->rfkill_mngr.rfkill->dev.class->suspend = NULL;
+	priv->rfkill_mngr.rfkill->dev.class->resume = NULL;
+
+	priv->rfkill_mngr.input_dev = input_allocate_device();
+	if (!priv->rfkill_mngr.input_dev) {
+		ret = -ENOMEM;
+		goto freed_rfkill;
+	}
+
+	priv->rfkill_mngr.input_dev->name = priv->cfg->name;
+	priv->rfkill_mngr.input_dev->phys = wiphy_name(priv->hw->wiphy);
+	priv->rfkill_mngr.input_dev->id.bustype = BUS_HOST;
+	priv->rfkill_mngr.input_dev->id.vendor = priv->pci_dev->vendor;
+	priv->rfkill_mngr.input_dev->dev.parent = device;
+	priv->rfkill_mngr.input_dev->evbit[0] = BIT(EV_KEY);
+	set_bit(KEY_WLAN, priv->rfkill_mngr.input_dev->keybit);
+
+	ret = rfkill_register(priv->rfkill_mngr.rfkill);
+	if (ret)
+		goto free_input_dev;
+
+	ret = input_register_device(priv->rfkill_mngr.input_dev);
+	if (ret)
+		goto unregister_rfkill;
+
+	return ret;
+
+unregister_rfkill:
+	rfkill_unregister(priv->rfkill_mngr.rfkill);
+
+free_input_dev:
+	input_free_device(priv->rfkill_mngr.input_dev);
+	priv->rfkill_mngr.input_dev = NULL;
+
+freed_rfkill:
+	rfkill_free(priv->rfkill_mngr.rfkill);
+	priv->rfkill_mngr.rfkill = NULL;
+
+error:
+	return ret;
+}
+EXPORT_SYMBOL(iwl_rfkill_init);
+
+void iwl_rfkill_unregister(struct iwl_priv *priv)
+{
+
+	if (priv->rfkill_mngr.input_dev)
+		input_unregister_device(priv->rfkill_mngr.input_dev);
+
+	if (priv->rfkill_mngr.rfkill)
+		rfkill_unregister(priv->rfkill_mngr.rfkill);
+}
+EXPORT_SYMBOL(iwl_rfkill_unregister);
+
+
+void iwl_rfkill_free(struct iwl_priv *priv)
+{
+	if (priv->rfkill_mngr.input_dev)
+		input_free_device(priv->rfkill_mngr.input_dev);
+
+	if (priv->rfkill_mngr.rfkill)
+		rfkill_free(priv->rfkill_mngr.rfkill);
+}
+EXPORT_SYMBOL(iwl_rfkill_free);
+
+/* set rf-kill to the right state. */
+void iwl_rfkill_set_hw_state(struct iwl_priv *priv)
+{
+
+	if (!priv->rfkill_mngr.rfkill)
+		return;
+
+	if (!iwl_is_rfkill(priv))
+		priv->rfkill_mngr.rfkill->state = RFKILL_STATE_ON;
+	else
+		priv->rfkill_mngr.rfkill->state = RFKILL_STATE_OFF;
+}
+EXPORT_SYMBOL(iwl_rfkill_set_hw_state);