iwmc3200wifi: Add new Intel Wireless Multicomm 802.11 driver

This driver supports Intel's full MAC wireless multicomm 802.11 hardware.
Although the hardware is a 802.11agn device, we currently only support
802.11ag, in managed and ad-hoc mode (no AP mode for now).

Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: Samuel Ortiz <samuel.ortiz@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 680 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwmc3200wifi/main.c b/drivers/net/wireless/iwmc3200wifi/main.c
new file mode 100644
index 0000000..6a2640f
--- /dev/null
+++ b/drivers/net/wireless/iwmc3200wifi/main.c
@@ -0,0 +1,680 @@
+/*
+ * Intel Wireless Multicomm 3200 WiFi driver
+ *
+ * Copyright (C) 2009 Intel Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   * Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in
+ *     the documentation and/or other materials provided with the
+ *     distribution.
+ *   * Neither the name of Intel Corporation nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * Intel Corporation <ilw@linux.intel.com>
+ * Samuel Ortiz <samuel.ortiz@intel.com>
+ * Zhu Yi <yi.zhu@intel.com>
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/ieee80211.h>
+#include <linux/wireless.h>
+
+#include "iwm.h"
+#include "debug.h"
+#include "bus.h"
+#include "umac.h"
+#include "commands.h"
+#include "hal.h"
+#include "fw.h"
+#include "rx.h"
+
+static struct iwm_conf def_iwm_conf = {
+
+	.sdio_ior_timeout	= 5000,
+	.init_calib_map		= BIT(PHY_CALIBRATE_DC_CMD)	|
+				  BIT(PHY_CALIBRATE_LO_CMD)	|
+				  BIT(PHY_CALIBRATE_TX_IQ_CMD)	|
+				  BIT(PHY_CALIBRATE_RX_IQ_CMD),
+	.periodic_calib_map	= BIT(PHY_CALIBRATE_DC_CMD)	|
+				  BIT(PHY_CALIBRATE_LO_CMD)	|
+				  BIT(PHY_CALIBRATE_TX_IQ_CMD)	|
+				  BIT(PHY_CALIBRATE_RX_IQ_CMD)	|
+				  BIT(SHILOH_PHY_CALIBRATE_BASE_BAND_CMD),
+	.reset_on_fatal_err	= 1,
+	.auto_connect		= 1,
+	.wimax_not_present	= 0,
+	.enable_qos		= 1,
+	.mode			= UMAC_MODE_BSS,
+
+	/* UMAC configuration */
+	.power_index		= 0,
+	.frag_threshold		= IEEE80211_MAX_FRAG_THRESHOLD,
+	.rts_threshold		= IEEE80211_MAX_RTS_THRESHOLD,
+	.cts_to_self		= 0,
+
+	.assoc_timeout		= 2,
+	.roam_timeout		= 10,
+	.wireless_mode		= WIRELESS_MODE_11A | WIRELESS_MODE_11G,
+	.coexist_mode		= COEX_MODE_CM,
+
+	/* IBSS */
+	.ibss_band		= UMAC_BAND_2GHZ,
+	.ibss_channel		= 1,
+
+	.mac_addr		= {0x00, 0x02, 0xb3, 0x01, 0x02, 0x03},
+};
+
+static int modparam_reset;
+module_param_named(reset, modparam_reset, bool, 0644);
+MODULE_PARM_DESC(reset, "reset on firmware errors (default 0 [not reset])");
+
+int iwm_mode_to_nl80211_iftype(int mode)
+{
+	switch (mode) {
+	case UMAC_MODE_BSS:
+		return NL80211_IFTYPE_STATION;
+	case UMAC_MODE_IBSS:
+		return NL80211_IFTYPE_ADHOC;
+	default:
+		return NL80211_IFTYPE_UNSPECIFIED;
+	}
+
+	return 0;
+}
+
+static void iwm_statistics_request(struct work_struct *work)
+{
+	struct iwm_priv *iwm =
+		container_of(work, struct iwm_priv, stats_request.work);
+
+	iwm_send_umac_stats_req(iwm, 0);
+}
+
+static void iwm_reset_worker(struct work_struct *work)
+{
+	struct iwm_priv *iwm;
+	struct iwm_umac_profile *profile = NULL;
+	int uninitialized_var(ret), retry = 0;
+
+	iwm = container_of(work, struct iwm_priv, reset_worker);
+
+	if (iwm->umac_profile_active) {
+		profile = kmalloc(sizeof(struct iwm_umac_profile), GFP_KERNEL);
+		if (profile)
+			memcpy(profile, iwm->umac_profile, sizeof(*profile));
+		else
+			IWM_ERR(iwm, "Couldn't alloc memory for profile\n");
+	}
+
+	iwm_down(iwm);
+
+	while (retry++ < 3) {
+		ret = iwm_up(iwm);
+		if (!ret)
+			break;
+
+		schedule_timeout_uninterruptible(10 * HZ);
+	}
+
+	if (ret) {
+		IWM_WARN(iwm, "iwm_up() failed: %d\n", ret);
+
+		kfree(profile);
+		return;
+	}
+
+	if (profile) {
+		IWM_DBG_MLME(iwm, DBG, "Resend UMAC profile\n");
+		memcpy(iwm->umac_profile, profile, sizeof(*profile));
+		iwm_send_mlme_profile(iwm);
+		kfree(profile);
+	}
+}
+
+static void iwm_watchdog(unsigned long data)
+{
+	struct iwm_priv *iwm = (struct iwm_priv *)data;
+
+	IWM_WARN(iwm, "Watchdog expired: UMAC stalls!\n");
+
+	if (modparam_reset)
+		schedule_work(&iwm->reset_worker);
+}
+
+int iwm_priv_init(struct iwm_priv *iwm)
+{
+	int i;
+	char name[32];
+
+	iwm->status = 0;
+	INIT_LIST_HEAD(&iwm->pending_notif);
+	init_waitqueue_head(&iwm->notif_queue);
+	init_waitqueue_head(&iwm->nonwifi_queue);
+	init_waitqueue_head(&iwm->mlme_queue);
+	memcpy(&iwm->conf, &def_iwm_conf, sizeof(struct iwm_conf));
+	spin_lock_init(&iwm->tx_credit.lock);
+	INIT_LIST_HEAD(&iwm->wifi_pending_cmd);
+	INIT_LIST_HEAD(&iwm->nonwifi_pending_cmd);
+	iwm->wifi_seq_num = UMAC_WIFI_SEQ_NUM_BASE;
+	iwm->nonwifi_seq_num = UMAC_NONWIFI_SEQ_NUM_BASE;
+	spin_lock_init(&iwm->cmd_lock);
+	iwm->scan_id = 1;
+	INIT_DELAYED_WORK(&iwm->stats_request, iwm_statistics_request);
+	INIT_WORK(&iwm->reset_worker, iwm_reset_worker);
+	INIT_LIST_HEAD(&iwm->bss_list);
+
+	skb_queue_head_init(&iwm->rx_list);
+	INIT_LIST_HEAD(&iwm->rx_tickets);
+	for (i = 0; i < IWM_RX_ID_HASH; i++)
+		INIT_LIST_HEAD(&iwm->rx_packets[i]);
+
+	INIT_WORK(&iwm->rx_worker, iwm_rx_worker);
+
+	iwm->rx_wq = create_singlethread_workqueue(KBUILD_MODNAME "_rx");
+	if (!iwm->rx_wq)
+		return -EAGAIN;
+
+	for (i = 0; i < IWM_TX_QUEUES; i++) {
+		INIT_WORK(&iwm->txq[i].worker, iwm_tx_worker);
+		snprintf(name, 32, KBUILD_MODNAME "_tx_%d", i);
+		iwm->txq[i].id = i;
+		iwm->txq[i].wq = create_singlethread_workqueue(name);
+		if (!iwm->txq[i].wq)
+			return -EAGAIN;
+
+		skb_queue_head_init(&iwm->txq[i].queue);
+	}
+
+	for (i = 0; i < IWM_NUM_KEYS; i++)
+		memset(&iwm->keys[i], 0, sizeof(struct iwm_key));
+
+	iwm->default_key = NULL;
+
+	init_timer(&iwm->watchdog);
+	iwm->watchdog.function = iwm_watchdog;
+	iwm->watchdog.data = (unsigned long)iwm;
+
+	return 0;
+}
+
+/*
+ * We reset all the structures, and we reset the UMAC.
+ * After calling this routine, you're expected to reload
+ * the firmware.
+ */
+void iwm_reset(struct iwm_priv *iwm)
+{
+	struct iwm_notif *notif, *next;
+
+	if (test_bit(IWM_STATUS_READY, &iwm->status))
+		iwm_target_reset(iwm);
+
+	iwm->status = 0;
+	iwm->scan_id = 1;
+
+	list_for_each_entry_safe(notif, next, &iwm->pending_notif, pending) {
+		list_del(&notif->pending);
+		kfree(notif->buf);
+		kfree(notif);
+	}
+
+	iwm_cmd_flush(iwm);
+
+	flush_workqueue(iwm->rx_wq);
+
+	iwm_link_off(iwm);
+}
+
+/*
+ * Notification code:
+ *
+ * We're faced with the following issue: Any host command can
+ * have an answer or not, and if there's an answer to expect,
+ * it can be treated synchronously or asynchronously.
+ * To work around the synchronous answer case, we implemented
+ * our notification mechanism.
+ * When a code path needs to wait for a command response
+ * synchronously, it calls notif_handle(), which waits for the
+ * right notification to show up, and then process it. Before
+ * starting to wait, it registered as a waiter for this specific
+ * answer (by toggling a bit in on of the handler_map), so that
+ * the rx code knows that it needs to send a notification to the
+ * waiting processes. It does so by calling iwm_notif_send(),
+ * which adds the notification to the pending notifications list,
+ * and then wakes the waiting processes up.
+ */
+int iwm_notif_send(struct iwm_priv *iwm, struct iwm_wifi_cmd *cmd,
+		   u8 cmd_id, u8 source, u8 *buf, unsigned long buf_size)
+{
+	struct iwm_notif *notif;
+
+	notif = kzalloc(sizeof(struct iwm_notif), GFP_KERNEL);
+	if (!notif) {
+		IWM_ERR(iwm, "Couldn't alloc memory for notification\n");
+		return -ENOMEM;
+	}
+
+	INIT_LIST_HEAD(&notif->pending);
+	notif->cmd = cmd;
+	notif->cmd_id = cmd_id;
+	notif->src = source;
+	notif->buf = kzalloc(buf_size, GFP_KERNEL);
+	if (!notif->buf) {
+		IWM_ERR(iwm, "Couldn't alloc notification buffer\n");
+		kfree(notif);
+		return -ENOMEM;
+	}
+	notif->buf_size = buf_size;
+	memcpy(notif->buf, buf, buf_size);
+	list_add_tail(&notif->pending, &iwm->pending_notif);
+
+	wake_up_interruptible(&iwm->notif_queue);
+
+	return 0;
+}
+
+static struct iwm_notif *iwm_notif_find(struct iwm_priv *iwm, u32 cmd,
+					u8 source)
+{
+	struct iwm_notif *notif, *next;
+
+	list_for_each_entry_safe(notif, next, &iwm->pending_notif, pending) {
+		if ((notif->cmd_id == cmd) && (notif->src == source)) {
+			list_del(&notif->pending);
+			return notif;
+		}
+	}
+
+	return NULL;
+}
+
+static struct iwm_notif *iwm_notif_wait(struct iwm_priv *iwm, u32 cmd,
+					u8 source, long timeout)
+{
+	int ret;
+	struct iwm_notif *notif;
+	unsigned long *map = NULL;
+
+	switch (source) {
+	case IWM_SRC_LMAC:
+		map = &iwm->lmac_handler_map[0];
+		break;
+	case IWM_SRC_UMAC:
+		map = &iwm->umac_handler_map[0];
+		break;
+	case IWM_SRC_UDMA:
+		map = &iwm->udma_handler_map[0];
+		break;
+	}
+
+	set_bit(cmd, map);
+
+	ret = wait_event_interruptible_timeout(iwm->notif_queue,
+			 ((notif = iwm_notif_find(iwm, cmd, source)) != NULL),
+					       timeout);
+	clear_bit(cmd, map);
+
+	if (!ret)
+		return NULL;
+
+	return notif;
+}
+
+int iwm_notif_handle(struct iwm_priv *iwm, u32 cmd, u8 source, long timeout)
+{
+	int ret;
+	struct iwm_notif *notif;
+
+	notif = iwm_notif_wait(iwm, cmd, source, timeout);
+	if (!notif)
+		return -ETIME;
+
+	ret = iwm_rx_handle_resp(iwm, notif->buf, notif->buf_size, notif->cmd);
+	kfree(notif->buf);
+	kfree(notif);
+
+	return ret;
+}
+
+static int iwm_config_boot_params(struct iwm_priv *iwm)
+{
+	struct iwm_udma_nonwifi_cmd target_cmd;
+	int ret;
+
+	/* check Wimax is off and config debug monitor */
+	if (iwm->conf.wimax_not_present) {
+		u32 data1 = 0x1f;
+		u32 addr1 = 0x606BE258;
+
+		u32 data2_set = 0x0;
+		u32 data2_clr = 0x1;
+		u32 addr2 = 0x606BE100;
+
+		u32 data3 = 0x1;
+		u32 addr3 = 0x606BEC00;
+
+		target_cmd.resp = 0;
+		target_cmd.handle_by_hw = 0;
+		target_cmd.eop = 1;
+
+		target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE;
+		target_cmd.addr = cpu_to_le32(addr1);
+		target_cmd.op1_sz = cpu_to_le32(sizeof(u32));
+		target_cmd.op2 = 0;
+
+		ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data1);
+		if (ret < 0) {
+			IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
+			return ret;
+		}
+
+		target_cmd.opcode = UMAC_HDI_OUT_OPCODE_READ_MODIFY_WRITE;
+		target_cmd.addr = cpu_to_le32(addr2);
+		target_cmd.op1_sz = cpu_to_le32(data2_set);
+		target_cmd.op2 = cpu_to_le32(data2_clr);
+
+		ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data1);
+		if (ret < 0) {
+			IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
+			return ret;
+		}
+
+		target_cmd.opcode = UMAC_HDI_OUT_OPCODE_WRITE;
+		target_cmd.addr = cpu_to_le32(addr3);
+		target_cmd.op1_sz = cpu_to_le32(sizeof(u32));
+		target_cmd.op2 = 0;
+
+		ret = iwm_hal_send_target_cmd(iwm, &target_cmd, &data3);
+		if (ret < 0) {
+			IWM_ERR(iwm, "iwm_hal_send_target_cmd failed\n");
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+void iwm_init_default_profile(struct iwm_priv *iwm,
+			      struct iwm_umac_profile *profile)
+{
+	memset(profile, 0, sizeof(struct iwm_umac_profile));
+
+	profile->sec.auth_type = UMAC_AUTH_TYPE_OPEN;
+	profile->sec.flags = UMAC_SEC_FLG_LEGACY_PROFILE;
+	profile->sec.ucast_cipher = UMAC_CIPHER_TYPE_NONE;
+	profile->sec.mcast_cipher = UMAC_CIPHER_TYPE_NONE;
+
+	if (iwm->conf.enable_qos)
+		profile->flags |= cpu_to_le16(UMAC_PROFILE_QOS_ALLOWED);
+
+	profile->wireless_mode = iwm->conf.wireless_mode;
+	profile->mode = cpu_to_le32(iwm->conf.mode);
+
+	profile->ibss.atim = 0;
+	profile->ibss.beacon_interval = 100;
+	profile->ibss.join_only = 0;
+	profile->ibss.band = iwm->conf.ibss_band;
+	profile->ibss.channel = iwm->conf.ibss_channel;
+}
+
+void iwm_link_on(struct iwm_priv *iwm)
+{
+	netif_carrier_on(iwm_to_ndev(iwm));
+	netif_tx_wake_all_queues(iwm_to_ndev(iwm));
+
+	iwm_send_umac_stats_req(iwm, 0);
+}
+
+void iwm_link_off(struct iwm_priv *iwm)
+{
+	struct iw_statistics *wstats = &iwm->wstats;
+	int i;
+
+	netif_tx_stop_all_queues(iwm_to_ndev(iwm));
+	netif_carrier_off(iwm_to_ndev(iwm));
+
+	for (i = 0; i < IWM_TX_QUEUES; i++) {
+		skb_queue_purge(&iwm->txq[i].queue);
+
+		iwm->txq[i].concat_count = 0;
+		iwm->txq[i].concat_ptr = iwm->txq[i].concat_buf;
+
+		flush_workqueue(iwm->txq[i].wq);
+	}
+
+	iwm_rx_free(iwm);
+
+	cancel_delayed_work(&iwm->stats_request);
+	memset(wstats, 0, sizeof(struct iw_statistics));
+	wstats->qual.updated = IW_QUAL_ALL_INVALID;
+
+	del_timer_sync(&iwm->watchdog);
+}
+
+static void iwm_bss_list_clean(struct iwm_priv *iwm)
+{
+	struct iwm_bss_info *bss, *next;
+
+	list_for_each_entry_safe(bss, next, &iwm->bss_list, node) {
+		list_del(&bss->node);
+		kfree(bss->bss);
+		kfree(bss);
+	}
+}
+
+static int iwm_channels_init(struct iwm_priv *iwm)
+{
+	int ret;
+
+#ifdef CONFIG_IWM_B0_HW_SUPPORT
+	if (iwm->conf.hw_b0) {
+		IWM_INFO(iwm, "Workaround EEPROM channels for B0 hardware\n");
+		return 0;
+	}
+#endif
+
+	ret = iwm_send_umac_channel_list(iwm);
+	if (ret) {
+		IWM_ERR(iwm, "Send channel list failed\n");
+		return ret;
+	}
+
+	ret = iwm_notif_handle(iwm, UMAC_CMD_OPCODE_GET_CHAN_INFO_LIST,
+			       IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
+	if (ret) {
+		IWM_ERR(iwm, "Didn't get a channel list notification\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+int iwm_up(struct iwm_priv *iwm)
+{
+	int ret;
+	struct iwm_notif *notif_reboot, *notif_ack = NULL;
+
+	ret = iwm_bus_enable(iwm);
+	if (ret) {
+		IWM_ERR(iwm, "Couldn't enable function\n");
+		return ret;
+	}
+
+	iwm_rx_setup_handlers(iwm);
+
+	/* Wait for initial BARKER_REBOOT from hardware */
+	notif_reboot = iwm_notif_wait(iwm, IWM_BARKER_REBOOT_NOTIFICATION,
+				      IWM_SRC_UDMA, 2 * HZ);
+	if (!notif_reboot) {
+		IWM_ERR(iwm, "Wait for REBOOT_BARKER timeout\n");
+		goto err_disable;
+	}
+
+	/* We send the barker back */
+	ret = iwm_bus_send_chunk(iwm, notif_reboot->buf, 16);
+	if (ret) {
+		IWM_ERR(iwm, "REBOOT barker response failed\n");
+		kfree(notif_reboot);
+		goto err_disable;
+	}
+
+	kfree(notif_reboot->buf);
+	kfree(notif_reboot);
+
+	/* Wait for ACK_BARKER from hardware */
+	notif_ack = iwm_notif_wait(iwm, IWM_ACK_BARKER_NOTIFICATION,
+				   IWM_SRC_UDMA, 2 * HZ);
+	if (!notif_ack) {
+		IWM_ERR(iwm, "Wait for ACK_BARKER timeout\n");
+		goto err_disable;
+	}
+
+	kfree(notif_ack->buf);
+	kfree(notif_ack);
+
+	/* We start to config static boot parameters */
+	ret = iwm_config_boot_params(iwm);
+	if (ret) {
+		IWM_ERR(iwm, "Config boot parameters failed\n");
+		goto err_disable;
+	}
+
+	ret = iwm_read_mac(iwm, iwm_to_ndev(iwm)->dev_addr);
+	if (ret) {
+		IWM_ERR(iwm, "MAC reading failed\n");
+		goto err_disable;
+	}
+
+	/* We can load the FWs */
+	ret = iwm_load_fw(iwm);
+	if (ret) {
+		IWM_ERR(iwm, "FW loading failed\n");
+		goto err_disable;
+	}
+
+	/* We configure the UMAC and enable the wifi module */
+	ret = iwm_send_umac_config(iwm,
+			cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_CORE_EN) |
+			cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_LINK_EN) |
+			cpu_to_le32(UMAC_RST_CTRL_FLG_WIFI_MLME_EN));
+	if (ret) {
+		IWM_ERR(iwm, "UMAC config failed\n");
+		goto err_fw;
+	}
+
+	ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS,
+			       IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
+	if (ret) {
+		IWM_ERR(iwm, "Didn't get a wifi core status notification\n");
+		goto err_fw;
+	}
+
+	if (iwm->core_enabled != (UMAC_NTFY_WIFI_CORE_STATUS_LINK_EN |
+				  UMAC_NTFY_WIFI_CORE_STATUS_MLME_EN)) {
+		IWM_DBG_BOOT(iwm, DBG, "Not all cores enabled:0x%x\n",
+			     iwm->core_enabled);
+		ret = iwm_notif_handle(iwm, UMAC_NOTIFY_OPCODE_WIFI_CORE_STATUS,
+			       IWM_SRC_UMAC, WAIT_NOTIF_TIMEOUT);
+		if (ret) {
+			IWM_ERR(iwm, "Didn't get a core status notification\n");
+			goto err_fw;
+		}
+
+		if (iwm->core_enabled != (UMAC_NTFY_WIFI_CORE_STATUS_LINK_EN |
+					  UMAC_NTFY_WIFI_CORE_STATUS_MLME_EN)) {
+			IWM_ERR(iwm, "Not all cores enabled: 0x%x\n",
+				iwm->core_enabled);
+			goto err_fw;
+		} else {
+			IWM_INFO(iwm, "All cores enabled\n");
+		}
+	}
+
+	iwm->umac_profile = kmalloc(sizeof(struct iwm_umac_profile),
+				    GFP_KERNEL);
+	if (!iwm->umac_profile) {
+		IWM_ERR(iwm, "Couldn't alloc memory for profile\n");
+		goto err_fw;
+	}
+
+	iwm_init_default_profile(iwm, iwm->umac_profile);
+
+	ret = iwm_channels_init(iwm);
+	if (ret < 0) {
+		IWM_ERR(iwm, "Couldn't init channels\n");
+		goto err_profile;
+	}
+
+	/* Set the READY bit to indicate interface is brought up successfully */
+	set_bit(IWM_STATUS_READY, &iwm->status);
+
+	return 0;
+
+ err_profile:
+	kfree(iwm->umac_profile);
+	iwm->umac_profile = NULL;
+
+ err_fw:
+	iwm_eeprom_exit(iwm);
+
+ err_disable:
+	ret = iwm_bus_disable(iwm);
+	if (ret < 0)
+		IWM_ERR(iwm, "Couldn't disable function\n");
+
+	return -EIO;
+}
+
+int iwm_down(struct iwm_priv *iwm)
+{
+	int ret;
+
+	/* The interface is already down */
+	if (!test_bit(IWM_STATUS_READY, &iwm->status))
+		return 0;
+
+	if (iwm->scan_request) {
+		cfg80211_scan_done(iwm->scan_request, true);
+		iwm->scan_request = NULL;
+	}
+
+	clear_bit(IWM_STATUS_READY, &iwm->status);
+
+	iwm_eeprom_exit(iwm);
+	kfree(iwm->umac_profile);
+	iwm->umac_profile = NULL;
+	iwm_bss_list_clean(iwm);
+
+	iwm->default_key = NULL;
+	iwm->core_enabled = 0;
+
+	ret = iwm_bus_disable(iwm);
+	if (ret < 0) {
+		IWM_ERR(iwm, "Couldn't disable function\n");
+		return ret;
+	}
+
+	return 0;
+}