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 000000000000..6a2640f16b6d
--- /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;
+}