12 files changed, 459 insertions, 4 deletions

diff --git a/drivers/net/wireless/wl12xx/acx.c b/drivers/net/wireless/wl12xx/acx.c
index b5880eba06e..87caa94fd81 100644
--- a/drivers/net/wireless/wl12xx/acx.c
+++ b/drivers/net/wireless/wl12xx/acx.c
@@ -1067,6 +1067,7 @@ int wl1271_acx_sta_mem_cfg(struct wl1271 *wl)
         mem_conf->tx_free_req = mem->min_req_tx_blocks;
         mem_conf->rx_free_req = mem->min_req_rx_blocks;
         mem_conf->tx_min = mem->tx_min;
+        mem_conf->fwlog_blocks = wl->conf.fwlog.mem_blocks;
 
         ret = wl1271_cmd_configure(wl, ACX_MEM_CFG, mem_conf,
                                    sizeof(*mem_conf));
diff --git a/drivers/net/wireless/wl12xx/acx.h b/drivers/net/wireless/wl12xx/acx.h
index f1d55313617..d303265f163 100644
--- a/drivers/net/wireless/wl12xx/acx.h
+++ b/drivers/net/wireless/wl12xx/acx.h
@@ -828,6 +828,8 @@ struct wl1271_acx_sta_config_memory {
         u8 tx_free_req;
         u8 rx_free_req;
         u8 tx_min;
+        u8 fwlog_blocks;
+        u8 padding[3];
 } __packed;
 
 struct wl1271_acx_mem_map {
diff --git a/drivers/net/wireless/wl12xx/boot.c b/drivers/net/wireless/wl12xx/boot.c
index 2f0fb6a5bfd..101f7e0f632 100644
--- a/drivers/net/wireless/wl12xx/boot.c
+++ b/drivers/net/wireless/wl12xx/boot.c
@@ -117,6 +117,15 @@ static unsigned int wl12xx_get_fw_ver_quirks(struct wl1271 *wl)
               (fw_ver[FW_VER_MINOR] < FW_VER_MINOR_1_SPARE_AP_MIN))))
                 quirks |= WL12XX_QUIRK_USE_2_SPARE_BLOCKS;
 
+        /* Only new station firmwares support routing fw logs to the host */
+        if ((fw_ver[FW_VER_IF_TYPE] == FW_VER_IF_TYPE_STA) &&
+            (fw_ver[FW_VER_MINOR] < FW_VER_MINOR_FWLOG_STA_MIN))
+                quirks |= WL12XX_QUIRK_FWLOG_NOT_IMPLEMENTED;
+
+        /* This feature is not yet supported for AP mode */
+        if (fw_ver[FW_VER_IF_TYPE] == FW_VER_IF_TYPE_AP)
+                quirks |= WL12XX_QUIRK_FWLOG_NOT_IMPLEMENTED;
+
         return quirks;
 }
 
diff --git a/drivers/net/wireless/wl12xx/cmd.c b/drivers/net/wireless/wl12xx/cmd.c
index f3d332d11f8..c9a1fa52327 100644
--- a/drivers/net/wireless/wl12xx/cmd.c
+++ b/drivers/net/wireless/wl12xx/cmd.c
@@ -1234,3 +1234,87 @@ out_free:
 out:
         return ret;
 }
+
+int wl12xx_cmd_config_fwlog(struct wl1271 *wl)
+{
+        struct wl12xx_cmd_config_fwlog *cmd;
+        int ret = 0;
+
+        wl1271_debug(DEBUG_CMD, "cmd config firmware logger");
+
+        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+        if (!cmd) {
+                ret = -ENOMEM;
+                goto out;
+        }
+
+        cmd->logger_mode = wl->conf.fwlog.mode;
+        cmd->log_severity = wl->conf.fwlog.severity;
+        cmd->timestamp = wl->conf.fwlog.timestamp;
+        cmd->output = wl->conf.fwlog.output;
+        cmd->threshold = wl->conf.fwlog.threshold;
+
+        ret = wl1271_cmd_send(wl, CMD_CONFIG_FWLOGGER, cmd, sizeof(*cmd), 0);
+        if (ret < 0) {
+                wl1271_error("failed to send config firmware logger command");
+                goto out_free;
+        }
+
+out_free:
+        kfree(cmd);
+
+out:
+        return ret;
+}
+
+int wl12xx_cmd_start_fwlog(struct wl1271 *wl)
+{
+        struct wl12xx_cmd_start_fwlog *cmd;
+        int ret = 0;
+
+        wl1271_debug(DEBUG_CMD, "cmd start firmware logger");
+
+        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+        if (!cmd) {
+                ret = -ENOMEM;
+                goto out;
+        }
+
+        ret = wl1271_cmd_send(wl, CMD_START_FWLOGGER, cmd, sizeof(*cmd), 0);
+        if (ret < 0) {
+                wl1271_error("failed to send start firmware logger command");
+                goto out_free;
+        }
+
+out_free:
+        kfree(cmd);
+
+out:
+        return ret;
+}
+
+int wl12xx_cmd_stop_fwlog(struct wl1271 *wl)
+{
+        struct wl12xx_cmd_stop_fwlog *cmd;
+        int ret = 0;
+
+        wl1271_debug(DEBUG_CMD, "cmd stop firmware logger");
+
+        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+        if (!cmd) {
+                ret = -ENOMEM;
+                goto out;
+        }
+
+        ret = wl1271_cmd_send(wl, CMD_STOP_FWLOGGER, cmd, sizeof(*cmd), 0);
+        if (ret < 0) {
+                wl1271_error("failed to send stop firmware logger command");
+                goto out_free;
+        }
+
+out_free:
+        kfree(cmd);
+
+out:
+        return ret;
+}
diff --git a/drivers/net/wireless/wl12xx/cmd.h b/drivers/net/wireless/wl12xx/cmd.h
index 5cac95d9480..1f7037292c1 100644
--- a/drivers/net/wireless/wl12xx/cmd.h
+++ b/drivers/net/wireless/wl12xx/cmd.h
@@ -70,6 +70,9 @@ int wl1271_cmd_start_bss(struct wl1271 *wl);
 int wl1271_cmd_stop_bss(struct wl1271 *wl);
 int wl1271_cmd_add_sta(struct wl1271 *wl, struct ieee80211_sta *sta, u8 hlid);
 int wl1271_cmd_remove_sta(struct wl1271 *wl, u8 hlid);
+int wl12xx_cmd_config_fwlog(struct wl1271 *wl);
+int wl12xx_cmd_start_fwlog(struct wl1271 *wl);
+int wl12xx_cmd_stop_fwlog(struct wl1271 *wl);
 
 enum wl1271_commands {
         CMD_INTERROGATE     = 1,    /*use this to read information elements*/
@@ -107,6 +110,9 @@ enum wl1271_commands {
         CMD_START_PERIODIC_SCAN      = 50,
         CMD_STOP_PERIODIC_SCAN       = 51,
         CMD_SET_STA_STATE            = 52,
+        CMD_CONFIG_FWLOGGER          = 53,
+        CMD_START_FWLOGGER           = 54,
+        CMD_STOP_FWLOGGER            = 55,
 
         /* AP mode commands */
         CMD_BSS_START                = 60,
@@ -575,4 +581,60 @@ struct wl1271_cmd_remove_sta {
         u8 padding1;
 } __packed;
 
+/*
+ * Continuous mode - packets are transferred to the host periodically
+ * via the data path.
+ * On demand - Log messages are stored in a cyclic buffer in the
+ * firmware, and only transferred to the host when explicitly requested
+ */
+enum wl12xx_fwlogger_log_mode {
+        WL12XX_FWLOG_CONTINUOUS,
+        WL12XX_FWLOG_ON_DEMAND
+};
+
+/* Include/exclude timestamps from the log messages */
+enum wl12xx_fwlogger_timestamp {
+        WL12XX_FWLOG_TIMESTAMP_DISABLED,
+        WL12XX_FWLOG_TIMESTAMP_ENABLED
+};
+
+/*
+ * Logs can be routed to the debug pinouts (where available), to the host bus
+ * (SDIO/SPI), or dropped
+ */
+enum wl12xx_fwlogger_output {
+        WL12XX_FWLOG_OUTPUT_NONE,
+        WL12XX_FWLOG_OUTPUT_DBG_PINS,
+        WL12XX_FWLOG_OUTPUT_HOST,
+};
+
+struct wl12xx_cmd_config_fwlog {
+        struct wl1271_cmd_header header;
+
+        /* See enum wl12xx_fwlogger_log_mode */
+        u8 logger_mode;
+
+        /* Minimum log level threshold */
+        u8 log_severity;
+
+        /* Include/exclude timestamps from the log messages */
+        u8 timestamp;
+
+        /* See enum wl1271_fwlogger_output */
+        u8 output;
+
+        /* Regulates the frequency of log messages */
+        u8 threshold;
+
+        u8 padding[3];
+} __packed;
+
+struct wl12xx_cmd_start_fwlog {
+        struct wl1271_cmd_header header;
+} __packed;
+
+struct wl12xx_cmd_stop_fwlog {
+        struct wl1271_cmd_header header;
+} __packed;
+
 #endif /* __WL1271_CMD_H__ */
diff --git a/drivers/net/wireless/wl12xx/conf.h b/drivers/net/wireless/wl12xx/conf.h
index aa79b437e60..b5a7b30afda 100644
--- a/drivers/net/wireless/wl12xx/conf.h
+++ b/drivers/net/wireless/wl12xx/conf.h
@@ -1277,6 +1277,30 @@ struct conf_rx_streaming_settings {
         u8 always;
 };
 
+struct conf_fwlog {
+        /* Continuous or on-demand */
+        u8 mode;
+
+        /*
+         * Number of memory blocks dedicated for the FW logger
+         *
+         * Range: 1-3, or 0 to disable the FW logger
+         */
+        u8 mem_blocks;
+
+        /* Minimum log level threshold */
+        u8 severity;
+
+        /* Include/exclude timestamps from the log messages */
+        u8 timestamp;
+
+        /* See enum wl1271_fwlogger_output */
+        u8 output;
+
+        /* Regulates the frequency of log messages */
+        u8 threshold;
+};
+
 struct conf_drv_settings {
         struct conf_sg_settings sg;
         struct conf_rx_settings rx;
@@ -1293,6 +1317,7 @@ struct conf_drv_settings {
         struct conf_memory_settings mem_wl128x;
         struct conf_fm_coex fm_coex;
         struct conf_rx_streaming_settings rx_streaming;
+        struct conf_fwlog fwlog;
         u8 hci_io_ds;
 };
 
diff --git a/drivers/net/wireless/wl12xx/init.c b/drivers/net/wireless/wl12xx/init.c
index f5c2c9e6f84..cf40ac93cea 100644
--- a/drivers/net/wireless/wl12xx/init.c
+++ b/drivers/net/wireless/wl12xx/init.c
@@ -321,6 +321,20 @@ static int wl1271_init_beacon_broadcast(struct wl1271 *wl)
         return 0;
 }
 
+static int wl12xx_init_fwlog(struct wl1271 *wl)
+{
+        int ret;
+
+        if (wl->quirks & WL12XX_QUIRK_FWLOG_NOT_IMPLEMENTED)
+                return 0;
+
+        ret = wl12xx_cmd_config_fwlog(wl);
+        if (ret < 0)
+                return ret;
+
+        return 0;
+}
+
 static int wl1271_sta_hw_init(struct wl1271 *wl)
 {
         int ret;
@@ -382,6 +396,11 @@ static int wl1271_sta_hw_init(struct wl1271 *wl)
         if (ret < 0)
                 return ret;
 
+        /* Configure the FW logger */
+        ret = wl12xx_init_fwlog(wl);
+        if (ret < 0)
+                return ret;
+
         return 0;
 }
 
diff --git a/drivers/net/wireless/wl12xx/io.h b/drivers/net/wireless/wl12xx/io.h
index beed621a8ae..cfb3588a4dd 100644
--- a/drivers/net/wireless/wl12xx/io.h
+++ b/drivers/net/wireless/wl12xx/io.h
@@ -128,6 +128,20 @@ static inline void wl1271_write(struct wl1271 *wl, int addr, void *buf,
         wl1271_raw_write(wl, physical, buf, len, fixed);
 }
 
+static inline void wl1271_read_hwaddr(struct wl1271 *wl, int hwaddr,
+                                      void *buf, size_t len, bool fixed)
+{
+        int physical;
+        int addr;
+
+        /* Addresses are stored internally as addresses to 32 bytes blocks */
+        addr = hwaddr << 5;
+
+        physical = wl1271_translate_addr(wl, addr);
+
+        wl1271_raw_read(wl, physical, buf, len, fixed);
+}
+
 static inline u32 wl1271_read32(struct wl1271 *wl, int addr)
 {
         return wl1271_raw_read32(wl, wl1271_translate_addr(wl, addr));
diff --git a/drivers/net/wireless/wl12xx/main.c b/drivers/net/wireless/wl12xx/main.c
index 6926d0a3e5c..a3734bdf511 100644
--- a/drivers/net/wireless/wl12xx/main.c
+++ b/drivers/net/wireless/wl12xx/main.c
@@ -31,6 +31,7 @@
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/wl12xx.h>
+#include <linux/sched.h>
 
 #include "wl12xx.h"
 #include "wl12xx_80211.h"
@@ -368,9 +369,19 @@ static struct conf_drv_settings default_conf = {
                 .interval                      = 20,
                 .always                        = 0,
         },
+        .fwlog = {
+                .mode                         = WL12XX_FWLOG_ON_DEMAND,
+                .mem_blocks                   = 2,
+                .severity                     = 0,
+                .timestamp                    = WL12XX_FWLOG_TIMESTAMP_DISABLED,
+                .output                       = WL12XX_FWLOG_OUTPUT_HOST,
+                .threshold                    = 0,
+        },
         .hci_io_ds = HCI_IO_DS_6MA,
 };
 
+static char *fwlog_param;
+
 static void __wl1271_op_remove_interface(struct wl1271 *wl,
                                          bool reset_tx_queues);
 static void wl1271_free_ap_keys(struct wl1271 *wl);
@@ -617,8 +628,24 @@ static void wl1271_conf_init(struct wl1271 *wl)
 
         /* apply driver default configuration */
         memcpy(&wl->conf, &default_conf, sizeof(default_conf));
-}
 
+        /* Adjust settings according to optional module parameters */
+        if (fwlog_param) {
+                if (!strcmp(fwlog_param, "continuous")) {
+                        wl->conf.fwlog.mode = WL12XX_FWLOG_CONTINUOUS;
+                } else if (!strcmp(fwlog_param, "ondemand")) {
+                        wl->conf.fwlog.mode = WL12XX_FWLOG_ON_DEMAND;
+                } else if (!strcmp(fwlog_param, "dbgpins")) {
+                        wl->conf.fwlog.mode = WL12XX_FWLOG_CONTINUOUS;
+                        wl->conf.fwlog.output = WL12XX_FWLOG_OUTPUT_DBG_PINS;
+                } else if (!strcmp(fwlog_param, "disable")) {
+                        wl->conf.fwlog.mem_blocks = 0;
+                        wl->conf.fwlog.output = WL12XX_FWLOG_OUTPUT_NONE;
+                } else {
+                        wl1271_error("Unknown fwlog parameter %s", fwlog_param);
+                }
+        }
+}
 
 static int wl1271_plt_init(struct wl1271 *wl)
 {
@@ -1105,6 +1132,83 @@ void wl12xx_queue_recovery_work(struct wl1271 *wl)
                 ieee80211_queue_work(wl->hw, &wl->recovery_work);
 }
 
+size_t wl12xx_copy_fwlog(struct wl1271 *wl, u8 *memblock, size_t maxlen)
+{
+        size_t len = 0;
+
+        /* The FW log is a length-value list, find where the log end */
+        while (len < maxlen) {
+                if (memblock[len] == 0)
+                        break;
+                if (len + memblock[len] + 1 > maxlen)
+                        break;
+                len += memblock[len] + 1;
+        }
+
+        /* Make sure we have enough room */
+        len = min(len, (size_t)(PAGE_SIZE - wl->fwlog_size));
+
+        /* Fill the FW log file, consumed by the sysfs fwlog entry */
+        memcpy(wl->fwlog + wl->fwlog_size, memblock, len);
+        wl->fwlog_size += len;
+
+        return len;
+}
+
+static void wl12xx_read_fwlog_panic(struct wl1271 *wl)
+{
+        u32 addr;
+        u32 first_addr;
+        u8 *block;
+
+        if ((wl->quirks & WL12XX_QUIRK_FWLOG_NOT_IMPLEMENTED) ||
+            (wl->conf.fwlog.mode != WL12XX_FWLOG_ON_DEMAND) ||
+            (wl->conf.fwlog.mem_blocks == 0))
+                return;
+
+        wl1271_info("Reading FW panic log");
+
+        block = kmalloc(WL12XX_HW_BLOCK_SIZE, GFP_KERNEL);
+        if (!block)
+                return;
+
+        /*
+         * Make sure the chip is awake and the logger isn't active.
+         * This might fail if the firmware hanged.
+         */
+        if (!wl1271_ps_elp_wakeup(wl))
+                wl12xx_cmd_stop_fwlog(wl);
+
+        /* Read the first memory block address */
+        wl1271_fw_status(wl, wl->fw_status);
+        first_addr = __le32_to_cpu(wl->fw_status->sta.log_start_addr);
+        if (!first_addr)
+                goto out;
+
+        /* Traverse the memory blocks linked list */
+        addr = first_addr;
+        do {
+                memset(block, 0, WL12XX_HW_BLOCK_SIZE);
+                wl1271_read_hwaddr(wl, addr, block, WL12XX_HW_BLOCK_SIZE,
+                                   false);
+
+                /*
+                 * Memory blocks are linked to one another. The first 4 bytes
+                 * of each memory block hold the hardware address of the next
+                 * one. The last memory block points to the first one.
+                 */
+                addr = __le32_to_cpup((__le32 *)block);
+                if (!wl12xx_copy_fwlog(wl, block + sizeof(addr),
+                                       WL12XX_HW_BLOCK_SIZE - sizeof(addr)))
+                        break;
+        } while (addr && (addr != first_addr));
+
+        wake_up_interruptible(&wl->fwlog_waitq);
+
+out:
+        kfree(block);
+}
+
 static void wl1271_recovery_work(struct work_struct *work)
 {
         struct wl1271 *wl =
@@ -1118,6 +1222,8 @@ static void wl1271_recovery_work(struct work_struct *work)
         /* Avoid a recursive recovery */
         set_bit(WL1271_FLAG_RECOVERY_IN_PROGRESS, &wl->flags);
 
+        wl12xx_read_fwlog_panic(wl);
+
         wl1271_info("Hardware recovery in progress. FW ver: %s pc: 0x%x",
                     wl->chip.fw_ver_str, wl1271_read32(wl, SCR_PAD4));
 
@@ -3942,6 +4048,69 @@ static ssize_t wl1271_sysfs_show_hw_pg_ver(struct device *dev,
 static DEVICE_ATTR(hw_pg_ver, S_IRUGO | S_IWUSR,
                    wl1271_sysfs_show_hw_pg_ver, NULL);
 
+static ssize_t wl1271_sysfs_read_fwlog(struct file *filp, struct kobject *kobj,
+                                       struct bin_attribute *bin_attr,
+                                       char *buffer, loff_t pos, size_t count)
+{
+        struct device *dev = container_of(kobj, struct device, kobj);
+        struct wl1271 *wl = dev_get_drvdata(dev);
+        ssize_t len;
+        int ret;
+
+        ret = mutex_lock_interruptible(&wl->mutex);
+        if (ret < 0)
+                return -ERESTARTSYS;
+
+        /* Let only one thread read the log at a time, blocking others */
+        while (wl->fwlog_size == 0) {
+                DEFINE_WAIT(wait);
+
+                prepare_to_wait_exclusive(&wl->fwlog_waitq,
+                                          &wait,
+                                          TASK_INTERRUPTIBLE);
+
+                if (wl->fwlog_size != 0) {
+                        finish_wait(&wl->fwlog_waitq, &wait);
+                        break;
+                }
+
+                mutex_unlock(&wl->mutex);
+
+                schedule();
+                finish_wait(&wl->fwlog_waitq, &wait);
+
+                if (signal_pending(current))
+                        return -ERESTARTSYS;
+
+                ret = mutex_lock_interruptible(&wl->mutex);
+                if (ret < 0)
+                        return -ERESTARTSYS;
+        }
+
+        /* Check if the fwlog is still valid */
+        if (wl->fwlog_size < 0) {
+                mutex_unlock(&wl->mutex);
+                return 0;
+        }
+
+        /* Seeking is not supported - old logs are not kept. Disregard pos. */
+        len = min(count, (size_t)wl->fwlog_size);
+        wl->fwlog_size -= len;
+        memcpy(buffer, wl->fwlog, len);
+
+        /* Make room for new messages */
+        memmove(wl->fwlog, wl->fwlog + len, wl->fwlog_size);
+
+        mutex_unlock(&wl->mutex);
+
+        return len;
+}
+
+static struct bin_attribute fwlog_attr = {
+        .attr = {.name = "fwlog", .mode = S_IRUSR},
+        .read = wl1271_sysfs_read_fwlog,
+};
+
 int wl1271_register_hw(struct wl1271 *wl)
 {
         int ret;
@@ -4160,6 +4329,8 @@ struct ieee80211_hw *wl1271_alloc_hw(void)
         wl->sched_scanning = false;
         setup_timer(&wl->rx_streaming_timer, wl1271_rx_streaming_timer,
                     (unsigned long) wl);
+        wl->fwlog_size = 0;
+        init_waitqueue_head(&wl->fwlog_waitq);
 
         memset(wl->tx_frames_map, 0, sizeof(wl->tx_frames_map));
         for (i = 0; i < ACX_TX_DESCRIPTORS; i++)
@@ -4186,11 +4357,18 @@ struct ieee80211_hw *wl1271_alloc_hw(void)
                 goto err_aggr;
         }
 
+        /* Allocate one page for the FW log */
+        wl->fwlog = (u8 *)get_zeroed_page(GFP_KERNEL);
+        if (!wl->fwlog) {
+                ret = -ENOMEM;
+                goto err_dummy_packet;
+        }
+
         /* Register platform device */
         ret = platform_device_register(wl->plat_dev);
         if (ret) {
                 wl1271_error("couldn't register platform device");
-                goto err_dummy_packet;
+                goto err_fwlog;
         }
         dev_set_drvdata(&wl->plat_dev->dev, wl);
 
@@ -4208,14 +4386,27 @@ struct ieee80211_hw *wl1271_alloc_hw(void)
                 goto err_bt_coex_state;
         }
 
+        /* Create sysfs file for the FW log */
+        ret = device_create_bin_file(&wl->plat_dev->dev, &fwlog_attr);
+        if (ret < 0) {
+                wl1271_error("failed to create sysfs file fwlog");
+                goto err_hw_pg_ver;
+        }
+
         return hw;
 
+err_hw_pg_ver:
+        device_remove_file(&wl->plat_dev->dev, &dev_attr_hw_pg_ver);
+
 err_bt_coex_state:
         device_remove_file(&wl->plat_dev->dev, &dev_attr_bt_coex_state);
 
 err_platform:
         platform_device_unregister(wl->plat_dev);
 
+err_fwlog:
+        free_page((unsigned long)wl->fwlog);
+
 err_dummy_packet:
         dev_kfree_skb(wl->dummy_packet);
 
@@ -4240,7 +4431,15 @@ EXPORT_SYMBOL_GPL(wl1271_alloc_hw);
 
 int wl1271_free_hw(struct wl1271 *wl)
 {
+        /* Unblock any fwlog readers */
+        mutex_lock(&wl->mutex);
+        wl->fwlog_size = -1;
+        wake_up_interruptible_all(&wl->fwlog_waitq);
+        mutex_unlock(&wl->mutex);
+
+        device_remove_bin_file(&wl->plat_dev->dev, &fwlog_attr);
         platform_device_unregister(wl->plat_dev);
+        free_page((unsigned long)wl->fwlog);
         dev_kfree_skb(wl->dummy_packet);
         free_pages((unsigned long)wl->aggr_buf,
                         get_order(WL1271_AGGR_BUFFER_SIZE));
@@ -4268,6 +4467,10 @@ EXPORT_SYMBOL_GPL(wl12xx_debug_level);
 module_param_named(debug_level, wl12xx_debug_level, uint, S_IRUSR | S_IWUSR);
 MODULE_PARM_DESC(debug_level, "wl12xx debugging level");
 
+module_param_named(fwlog, fwlog_param, charp, 0);
+MODULE_PARM_DESC(keymap,
+                 "FW logger options: continuous, ondemand, dbgpins or disable");
+
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Luciano Coelho <coelho@ti.com>");
 MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
diff --git a/drivers/net/wireless/wl12xx/rx.c b/drivers/net/wireless/wl12xx/rx.c
index 9357695340c..0450fb49dbb 100644
--- a/drivers/net/wireless/wl12xx/rx.c
+++ b/drivers/net/wireless/wl12xx/rx.c
@@ -22,6 +22,7 @@
  */
 
 #include <linux/gfp.h>
+#include <linux/sched.h>
 
 #include "wl12xx.h"
 #include "acx.h"
@@ -107,6 +108,13 @@ static int wl1271_rx_handle_data(struct wl1271 *wl, u8 *data, u32 length)
         /* the data read starts with the descriptor */
         desc = (struct wl1271_rx_descriptor *) data;
 
+        if (desc->packet_class == WL12XX_RX_CLASS_LOGGER) {
+                size_t len = length - sizeof(*desc);
+                wl12xx_copy_fwlog(wl, data + sizeof(*desc), len);
+                wake_up_interruptible(&wl->fwlog_waitq);
+                return 0;
+        }
+
         switch (desc->status & WL1271_RX_DESC_STATUS_MASK) {
         /* discard corrupted packets */
         case WL1271_RX_DESC_DRIVER_RX_Q_FAIL:
diff --git a/drivers/net/wireless/wl12xx/rx.h b/drivers/net/wireless/wl12xx/rx.h
index 75fabf83649..c88e3fa1d60 100644
--- a/drivers/net/wireless/wl12xx/rx.h
+++ b/drivers/net/wireless/wl12xx/rx.h
@@ -97,6 +97,18 @@
 #define RX_BUF_SIZE_MASK      0xFFF00
 #define RX_BUF_SIZE_SHIFT_DIV 6
 
+enum {
+        WL12XX_RX_CLASS_UNKNOWN,
+        WL12XX_RX_CLASS_MANAGEMENT,
+        WL12XX_RX_CLASS_DATA,
+        WL12XX_RX_CLASS_QOS_DATA,
+        WL12XX_RX_CLASS_BCN_PRBRSP,
+        WL12XX_RX_CLASS_EAPOL,
+        WL12XX_RX_CLASS_BA_EVENT,
+        WL12XX_RX_CLASS_AMSDU,
+        WL12XX_RX_CLASS_LOGGER,
+};
+
 struct wl1271_rx_descriptor {
         __le16 length;
         u8  status;
diff --git a/drivers/net/wireless/wl12xx/wl12xx.h b/drivers/net/wireless/wl12xx/wl12xx.h
index 754a16ce5bc..d7db6e77047 100644
--- a/drivers/net/wireless/wl12xx/wl12xx.h
+++ b/drivers/net/wireless/wl12xx/wl12xx.h
@@ -226,6 +226,8 @@ enum {
 #define FW_VER_MINOR_1_SPARE_STA_MIN 58
 #define FW_VER_MINOR_1_SPARE_AP_MIN  47
 
+#define FW_VER_MINOR_FWLOG_STA_MIN 70
+
 struct wl1271_chip {
         u32 id;
         char fw_ver_str[ETHTOOL_BUSINFO_LEN];
@@ -284,8 +286,7 @@ struct wl1271_fw_sta_status {
         u8  tx_total;
         u8  reserved1;
         __le16 reserved2;
-        /* Total structure size is 68 bytes */
-        u32 padding;
+        __le32 log_start_addr;
 } __packed;
 
 struct wl1271_fw_full_status {
@@ -472,6 +473,15 @@ struct wl1271 {
         /* Network stack work  */
         struct work_struct netstack_work;
 
+        /* FW log buffer */
+        u8 *fwlog;
+
+        /* Number of valid bytes in the FW log buffer */
+        ssize_t fwlog_size;
+
+        /* Sysfs FW log entry readers wait queue */
+        wait_queue_head_t fwlog_waitq;
+
         /* Hardware recovery work */
         struct work_struct recovery_work;
 
@@ -614,6 +624,7 @@ int wl1271_plt_start(struct wl1271 *wl);
 int wl1271_plt_stop(struct wl1271 *wl);
 int wl1271_recalc_rx_streaming(struct wl1271 *wl);
 void wl12xx_queue_recovery_work(struct wl1271 *wl);
+size_t wl12xx_copy_fwlog(struct wl1271 *wl, u8 *memblock, size_t maxlen);
 
 #define JOIN_TIMEOUT 5000 /* 5000 milliseconds to join */
 
@@ -655,4 +666,9 @@ void wl12xx_queue_recovery_work(struct wl1271 *wl);
  */
 #define WL12XX_QUIRK_LPD_MODE                   BIT(3)
 
+/* Older firmwares did not implement the FW logger over bus feature */
+#define WL12XX_QUIRK_FWLOG_NOT_IMPLEMENTED      BIT(4)
+
+#define WL12XX_HW_BLOCK_SIZE    256
+
 #endif