wireless: mwifiex: initial commit for Marvell mwifiex driver

This driver adds WiFi support for Marvell 802.11n based chipsets
with SDIO interface. Currently only SD8787 is supported. More
chipsets will be supported later.

drivers/net/wireless/mwifiex/

Signed-off-by: Nishant Sarmukadam <nishants@marvell.com>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Kiran Divekar <dkiran@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: Yogesh Ashok Powar <yogeshp@marvell.com>
Signed-off-by: Marc Yang <yangyang@marvell.com>
Signed-off-by: Ramesh Radhakrishnan <rramesh@marvell.com>
Signed-off-by: Frank Huang <frankh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 773 insertions, 0 deletions

diff --git a/drivers/net/wireless/mwifiex/debugfs.c b/drivers/net/wireless/mwifiex/debugfs.c
new file mode 100644
index 000000000000..63b09692f27d
--- /dev/null
+++ b/drivers/net/wireless/mwifiex/debugfs.c
@@ -0,0 +1,773 @@
+/*
+ * Marvell Wireless LAN device driver: debugfs
+ *
+ * Copyright (C) 2011, Marvell International Ltd.
+ *
+ * This software file (the "File") is distributed by Marvell International
+ * Ltd. under the terms of the GNU General Public License Version 2, June 1991
+ * (the "License").  You may use, redistribute and/or modify this File in
+ * accordance with the terms and conditions of the License, a copy of which
+ * is available by writing to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
+ * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
+ *
+ * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
+ * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
+ * this warranty disclaimer.
+ */
+
+#include <linux/debugfs.h>
+
+#include "main.h"
+#include "11n.h"
+
+
+static struct dentry *mwifiex_dfs_dir;
+
+static char *bss_modes[] = {
+	"Unknown",
+	"Managed",
+	"Ad-hoc",
+	"Auto"
+};
+
+/* size/addr for mwifiex_debug_info */
+#define item_size(n)		(FIELD_SIZEOF(struct mwifiex_debug_info, n))
+#define item_addr(n)		(offsetof(struct mwifiex_debug_info, n))
+
+/* size/addr for struct mwifiex_adapter */
+#define adapter_item_size(n)	(FIELD_SIZEOF(struct mwifiex_adapter, n))
+#define adapter_item_addr(n)	(offsetof(struct mwifiex_adapter, n))
+
+struct mwifiex_debug_data {
+	char name[32];		/* variable/array name */
+	u32 size;		/* size of the variable/array */
+	size_t addr;		/* address of the variable/array */
+	int num;		/* number of variables in an array */
+};
+
+static struct mwifiex_debug_data items[] = {
+	{"int_counter", item_size(int_counter),
+	 item_addr(int_counter), 1},
+	{"wmm_ac_vo", item_size(packets_out[WMM_AC_VO]),
+	 item_addr(packets_out[WMM_AC_VO]), 1},
+	{"wmm_ac_vi", item_size(packets_out[WMM_AC_VI]),
+	 item_addr(packets_out[WMM_AC_VI]), 1},
+	{"wmm_ac_be", item_size(packets_out[WMM_AC_BE]),
+	 item_addr(packets_out[WMM_AC_BE]), 1},
+	{"wmm_ac_bk", item_size(packets_out[WMM_AC_BK]),
+	 item_addr(packets_out[WMM_AC_BK]), 1},
+	{"max_tx_buf_size", item_size(max_tx_buf_size),
+	 item_addr(max_tx_buf_size), 1},
+	{"tx_buf_size", item_size(tx_buf_size),
+	 item_addr(tx_buf_size), 1},
+	{"curr_tx_buf_size", item_size(curr_tx_buf_size),
+	 item_addr(curr_tx_buf_size), 1},
+	{"ps_mode", item_size(ps_mode),
+	 item_addr(ps_mode), 1},
+	{"ps_state", item_size(ps_state),
+	 item_addr(ps_state), 1},
+	{"is_deep_sleep", item_size(is_deep_sleep),
+	 item_addr(is_deep_sleep), 1},
+	{"wakeup_dev_req", item_size(pm_wakeup_card_req),
+	 item_addr(pm_wakeup_card_req), 1},
+	{"wakeup_tries", item_size(pm_wakeup_fw_try),
+	 item_addr(pm_wakeup_fw_try), 1},
+	{"hs_configured", item_size(is_hs_configured),
+	 item_addr(is_hs_configured), 1},
+	{"hs_activated", item_size(hs_activated),
+	 item_addr(hs_activated), 1},
+	{"num_tx_timeout", item_size(num_tx_timeout),
+	 item_addr(num_tx_timeout), 1},
+	{"num_cmd_timeout", item_size(num_cmd_timeout),
+	 item_addr(num_cmd_timeout), 1},
+	{"timeout_cmd_id", item_size(timeout_cmd_id),
+	 item_addr(timeout_cmd_id), 1},
+	{"timeout_cmd_act", item_size(timeout_cmd_act),
+	 item_addr(timeout_cmd_act), 1},
+	{"last_cmd_id", item_size(last_cmd_id),
+	 item_addr(last_cmd_id), DBG_CMD_NUM},
+	{"last_cmd_act", item_size(last_cmd_act),
+	 item_addr(last_cmd_act), DBG_CMD_NUM},
+	{"last_cmd_index", item_size(last_cmd_index),
+	 item_addr(last_cmd_index), 1},
+	{"last_cmd_resp_id", item_size(last_cmd_resp_id),
+	 item_addr(last_cmd_resp_id), DBG_CMD_NUM},
+	{"last_cmd_resp_index", item_size(last_cmd_resp_index),
+	 item_addr(last_cmd_resp_index), 1},
+	{"last_event", item_size(last_event),
+	 item_addr(last_event), DBG_CMD_NUM},
+	{"last_event_index", item_size(last_event_index),
+	 item_addr(last_event_index), 1},
+	{"num_cmd_h2c_fail", item_size(num_cmd_host_to_card_failure),
+	 item_addr(num_cmd_host_to_card_failure), 1},
+	{"num_cmd_sleep_cfm_fail",
+	 item_size(num_cmd_sleep_cfm_host_to_card_failure),
+	 item_addr(num_cmd_sleep_cfm_host_to_card_failure), 1},
+	{"num_tx_h2c_fail", item_size(num_tx_host_to_card_failure),
+	 item_addr(num_tx_host_to_card_failure), 1},
+	{"num_evt_deauth", item_size(num_event_deauth),
+	 item_addr(num_event_deauth), 1},
+	{"num_evt_disassoc", item_size(num_event_disassoc),
+	 item_addr(num_event_disassoc), 1},
+	{"num_evt_link_lost", item_size(num_event_link_lost),
+	 item_addr(num_event_link_lost), 1},
+	{"num_cmd_deauth", item_size(num_cmd_deauth),
+	 item_addr(num_cmd_deauth), 1},
+	{"num_cmd_assoc_ok", item_size(num_cmd_assoc_success),
+	 item_addr(num_cmd_assoc_success), 1},
+	{"num_cmd_assoc_fail", item_size(num_cmd_assoc_failure),
+	 item_addr(num_cmd_assoc_failure), 1},
+	{"cmd_sent", item_size(cmd_sent),
+	 item_addr(cmd_sent), 1},
+	{"data_sent", item_size(data_sent),
+	 item_addr(data_sent), 1},
+	{"cmd_resp_received", item_size(cmd_resp_received),
+	 item_addr(cmd_resp_received), 1},
+	{"event_received", item_size(event_received),
+	 item_addr(event_received), 1},
+
+	/* variables defined in struct mwifiex_adapter */
+	{"ioctl_pending", adapter_item_size(ioctl_pending),
+	 adapter_item_addr(ioctl_pending), 1},
+	{"tx_pending", adapter_item_size(tx_pending),
+	 adapter_item_addr(tx_pending), 1},
+	{"rx_pending", adapter_item_size(rx_pending),
+	 adapter_item_addr(rx_pending), 1},
+};
+
+static int num_of_items = ARRAY_SIZE(items);
+
+/*
+ * Generic proc file open handler.
+ *
+ * This function is called every time a file is accessed for read or write.
+ */
+static int
+mwifiex_open_generic(struct inode *inode, struct file *file)
+{
+	file->private_data = inode->i_private;
+	return 0;
+}
+
+/*
+ * Proc info file read handler.
+ *
+ * This function is called when the 'info' file is opened for reading.
+ * It prints the following driver related information -
+ *      - Driver name
+ *      - Driver version
+ *      - Driver extended version
+ *      - Interface name
+ *      - BSS mode
+ *      - Media state (connected or disconnected)
+ *      - MAC address
+ *      - Total number of Tx bytes
+ *      - Total number of Rx bytes
+ *      - Total number of Tx packets
+ *      - Total number of Rx packets
+ *      - Total number of dropped Tx packets
+ *      - Total number of dropped Rx packets
+ *      - Total number of corrupted Tx packets
+ *      - Total number of corrupted Rx packets
+ *      - Carrier status (on or off)
+ *      - Tx queue status (started or stopped)
+ *
+ * For STA mode drivers, it also prints the following extra -
+ *      - ESSID
+ *      - BSSID
+ *      - Channel
+ *      - Region code
+ *      - Multicast count
+ *      - Multicast addresses
+ */
+static ssize_t
+mwifiex_info_read(struct file *file, char __user *ubuf,
+		  size_t count, loff_t *ppos)
+{
+	struct mwifiex_private *priv =
+		(struct mwifiex_private *) file->private_data;
+	struct net_device *netdev = priv->netdev;
+	struct netdev_hw_addr *ha;
+	unsigned long page = get_zeroed_page(GFP_KERNEL);
+	char *p = (char *) page, fmt[64];
+	struct mwifiex_bss_info info;
+	ssize_t ret = 0;
+	int i = 0;
+
+	if (!p)
+		return -ENOMEM;
+
+	memset(&info, 0, sizeof(info));
+	ret = mwifiex_get_bss_info(priv, &info);
+	if (ret)
+		goto free_and_exit;
+
+	mwifiex_drv_get_driver_version(priv->adapter, fmt, sizeof(fmt) - 1);
+
+	if (!priv->version_str[0])
+		mwifiex_get_ver_ext(priv);
+
+	p += sprintf(p, "driver_name = " "\"mwifiex\"\n");
+	p += sprintf(p, "driver_version = %s", fmt);
+	p += sprintf(p, "\nverext = %s", priv->version_str);
+	p += sprintf(p, "\ninterface_name=\"%s\"\n", netdev->name);
+	p += sprintf(p, "bss_mode=\"%s\"\n", bss_modes[info.bss_mode]);
+	p += sprintf(p, "media_state=\"%s\"\n",
+		     (!priv->media_connected ? "Disconnected" : "Connected"));
+	p += sprintf(p, "mac_address=\"%02x:%02x:%02x:%02x:%02x:%02x\"\n",
+		     netdev->dev_addr[0], netdev->dev_addr[1],
+		     netdev->dev_addr[2], netdev->dev_addr[3],
+		     netdev->dev_addr[4], netdev->dev_addr[5]);
+
+	if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) {
+		p += sprintf(p, "multicast_count=\"%d\"\n",
+			     netdev_mc_count(netdev));
+		p += sprintf(p, "essid=\"%s\"\n", info.ssid.ssid);
+		p += sprintf(p, "bssid=\"%02x:%02x:%02x:%02x:%02x:%02x\"\n",
+			     info.bssid[0], info.bssid[1],
+			     info.bssid[2], info.bssid[3],
+			     info.bssid[4], info.bssid[5]);
+		p += sprintf(p, "channel=\"%d\"\n", (int) info.bss_chan);
+		p += sprintf(p, "region_code = \"%02x\"\n", info.region_code);
+
+		netdev_for_each_mc_addr(ha, netdev)
+			p += sprintf(p, "multicast_address[%d]="
+				     "\"%02x:%02x:%02x:%02x:%02x:%02x\"\n", i++,
+				     ha->addr[0], ha->addr[1],
+				     ha->addr[2], ha->addr[3],
+				     ha->addr[4], ha->addr[5]);
+	}
+
+	p += sprintf(p, "num_tx_bytes = %lu\n", priv->stats.tx_bytes);
+	p += sprintf(p, "num_rx_bytes = %lu\n", priv->stats.rx_bytes);
+	p += sprintf(p, "num_tx_pkts = %lu\n", priv->stats.tx_packets);
+	p += sprintf(p, "num_rx_pkts = %lu\n", priv->stats.rx_packets);
+	p += sprintf(p, "num_tx_pkts_dropped = %lu\n", priv->stats.tx_dropped);
+	p += sprintf(p, "num_rx_pkts_dropped = %lu\n", priv->stats.rx_dropped);
+	p += sprintf(p, "num_tx_pkts_err = %lu\n", priv->stats.tx_errors);
+	p += sprintf(p, "num_rx_pkts_err = %lu\n", priv->stats.rx_errors);
+	p += sprintf(p, "carrier %s\n", ((netif_carrier_ok(priv->netdev))
+					 ? "on" : "off"));
+	p += sprintf(p, "tx queue %s\n", ((netif_queue_stopped(priv->netdev))
+					  ? "stopped" : "started"));
+
+	ret = simple_read_from_buffer(ubuf, count, ppos, (char *) page,
+				      (unsigned long) p - page);
+
+free_and_exit:
+	free_page(page);
+	return ret;
+}
+
+/*
+ * Proc getlog file read handler.
+ *
+ * This function is called when the 'getlog' file is opened for reading
+ * It prints the following log information -
+ *      - Number of multicast Tx frames
+ *      - Number of failed packets
+ *      - Number of Tx retries
+ *      - Number of multicast Tx retries
+ *      - Number of duplicate frames
+ *      - Number of RTS successes
+ *      - Number of RTS failures
+ *      - Number of ACK failures
+ *      - Number of fragmented Rx frames
+ *      - Number of multicast Rx frames
+ *      - Number of FCS errors
+ *      - Number of Tx frames
+ *      - WEP ICV error counts
+ */
+static ssize_t
+mwifiex_getlog_read(struct file *file, char __user *ubuf,
+		    size_t count, loff_t *ppos)
+{
+	struct mwifiex_private *priv =
+		(struct mwifiex_private *) file->private_data;
+	unsigned long page = get_zeroed_page(GFP_KERNEL);
+	char *p = (char *) page;
+	ssize_t ret = 0;
+	struct mwifiex_ds_get_stats stats;
+
+	if (!p)
+		return -ENOMEM;
+
+	memset(&stats, 0, sizeof(stats));
+	ret = mwifiex_get_stats_info(priv, &stats);
+	if (ret)
+		goto free_and_exit;
+
+	p += sprintf(p, "\n"
+		     "mcasttxframe     %u\n"
+		     "failed           %u\n"
+		     "retry            %u\n"
+		     "multiretry       %u\n"
+		     "framedup         %u\n"
+		     "rtssuccess       %u\n"
+		     "rtsfailure       %u\n"
+		     "ackfailure       %u\n"
+		     "rxfrag           %u\n"
+		     "mcastrxframe     %u\n"
+		     "fcserror         %u\n"
+		     "txframe          %u\n"
+		     "wepicverrcnt-1   %u\n"
+		     "wepicverrcnt-2   %u\n"
+		     "wepicverrcnt-3   %u\n"
+		     "wepicverrcnt-4   %u\n",
+		     stats.mcast_tx_frame,
+		     stats.failed,
+		     stats.retry,
+		     stats.multi_retry,
+		     stats.frame_dup,
+		     stats.rts_success,
+		     stats.rts_failure,
+		     stats.ack_failure,
+		     stats.rx_frag,
+		     stats.mcast_rx_frame,
+		     stats.fcs_error,
+		     stats.tx_frame,
+		     stats.wep_icv_error[0],
+		     stats.wep_icv_error[1],
+		     stats.wep_icv_error[2],
+		     stats.wep_icv_error[3]);
+
+
+	ret = simple_read_from_buffer(ubuf, count, ppos, (char *) page,
+				      (unsigned long) p - page);
+
+free_and_exit:
+	free_page(page);
+	return ret;
+}
+
+static struct mwifiex_debug_info info;
+
+/*
+ * Proc debug file read handler.
+ *
+ * This function is called when the 'debug' file is opened for reading
+ * It prints the following log information -
+ *      - Interrupt count
+ *      - WMM AC VO packets count
+ *      - WMM AC VI packets count
+ *      - WMM AC BE packets count
+ *      - WMM AC BK packets count
+ *      - Maximum Tx buffer size
+ *      - Tx buffer size
+ *      - Current Tx buffer size
+ *      - Power Save mode
+ *      - Power Save state
+ *      - Deep Sleep status
+ *      - Device wakeup required status
+ *      - Number of wakeup tries
+ *      - Host Sleep configured status
+ *      - Host Sleep activated status
+ *      - Number of Tx timeouts
+ *      - Number of command timeouts
+ *      - Last timed out command ID
+ *      - Last timed out command action
+ *      - Last command ID
+ *      - Last command action
+ *      - Last command index
+ *      - Last command response ID
+ *      - Last command response index
+ *      - Last event
+ *      - Last event index
+ *      - Number of host to card command failures
+ *      - Number of sleep confirm command failures
+ *      - Number of host to card data failure
+ *      - Number of deauthentication events
+ *      - Number of disassociation events
+ *      - Number of link lost events
+ *      - Number of deauthentication commands
+ *      - Number of association success commands
+ *      - Number of association failure commands
+ *      - Number of commands sent
+ *      - Number of data packets sent
+ *      - Number of command responses received
+ *      - Number of events received
+ *      - Tx BA stream table (TID, RA)
+ *      - Rx reorder table (TID, TA, Start window, Window size, Buffer)
+ */
+static ssize_t
+mwifiex_debug_read(struct file *file, char __user *ubuf,
+		   size_t count, loff_t *ppos)
+{
+	struct mwifiex_private *priv =
+		(struct mwifiex_private *) file->private_data;
+	struct mwifiex_debug_data *d = &items[0];
+	unsigned long page = get_zeroed_page(GFP_KERNEL);
+	char *p = (char *) page;
+	ssize_t ret = 0;
+	size_t size, addr;
+	long val;
+	int i, j;
+
+	if (!p)
+		return -ENOMEM;
+
+	ret = mwifiex_get_debug_info(priv, &info);
+	if (ret)
+		goto free_and_exit;
+
+	for (i = 0; i < num_of_items; i++) {
+		p += sprintf(p, "%s=", d[i].name);
+
+		size = d[i].size / d[i].num;
+
+		if (i < (num_of_items - 3))
+			addr = d[i].addr + (size_t) &info;
+		else /* The last 3 items are struct mwifiex_adapter variables */
+			addr = d[i].addr + (size_t) priv->adapter;
+
+		for (j = 0; j < d[i].num; j++) {
+			switch (size) {
+			case 1:
+				val = *((u8 *) addr);
+				break;
+			case 2:
+				val = *((u16 *) addr);
+				break;
+			case 4:
+				val = *((u32 *) addr);
+				break;
+			case 8:
+				val = *((long long *) addr);
+				break;
+			default:
+				val = -1;
+				break;
+			}
+
+			p += sprintf(p, "%#lx ", val);
+			addr += size;
+		}
+
+		p += sprintf(p, "\n");
+	}
+
+	if (info.tx_tbl_num) {
+		p += sprintf(p, "Tx BA stream table:\n");
+		for (i = 0; i < info.tx_tbl_num; i++)
+			p += sprintf(p, "tid = %d, "
+				     "ra = %02x:%02x:%02x:%02x:%02x:%02x\n",
+				     info.tx_tbl[i].tid, info.tx_tbl[i].ra[0],
+				     info.tx_tbl[i].ra[1], info.tx_tbl[i].ra[2],
+				     info.tx_tbl[i].ra[3], info.tx_tbl[i].ra[4],
+				     info.tx_tbl[i].ra[5]);
+	}
+
+	if (info.rx_tbl_num) {
+		p += sprintf(p, "Rx reorder table:\n");
+		for (i = 0; i < info.rx_tbl_num; i++) {
+
+			p += sprintf(p, "tid = %d, "
+				     "ta = %02x:%02x:%02x:%02x:%02x:%02x, "
+				     "start_win = %d, "
+				     "win_size = %d, buffer: ",
+				     info.rx_tbl[i].tid,
+				     info.rx_tbl[i].ta[0], info.rx_tbl[i].ta[1],
+				     info.rx_tbl[i].ta[2], info.rx_tbl[i].ta[3],
+				     info.rx_tbl[i].ta[4], info.rx_tbl[i].ta[5],
+				     info.rx_tbl[i].start_win,
+				     info.rx_tbl[i].win_size);
+
+			for (j = 0; j < info.rx_tbl[i].win_size; j++)
+				p += sprintf(p, "%c ",
+					     info.rx_tbl[i].buffer[j] ?
+					     '1' : '0');
+
+			p += sprintf(p, "\n");
+		}
+	}
+
+	ret = simple_read_from_buffer(ubuf, count, ppos, (char *) page,
+				      (unsigned long) p - page);
+
+free_and_exit:
+	free_page(page);
+	return ret;
+}
+
+static u32 saved_reg_type, saved_reg_offset, saved_reg_value;
+
+/*
+ * Proc regrdwr file write handler.
+ *
+ * This function is called when the 'regrdwr' file is opened for writing
+ *
+ * This function can be used to write to a register.
+ */
+static ssize_t
+mwifiex_regrdwr_write(struct file *file,
+		      const char __user *ubuf, size_t count, loff_t *ppos)
+{
+	unsigned long addr = get_zeroed_page(GFP_KERNEL);
+	char *buf = (char *) addr;
+	size_t buf_size = min(count, (size_t) (PAGE_SIZE - 1));
+	int ret = 0;
+	u32 reg_type = 0, reg_offset = 0, reg_value = UINT_MAX;
+
+	if (!buf)
+		return -ENOMEM;
+
+
+	if (copy_from_user(buf, ubuf, buf_size)) {
+		ret = -EFAULT;
+		goto done;
+	}
+
+	sscanf(buf, "%u %x %x", &reg_type, &reg_offset, &reg_value);
+
+	if (reg_type == 0 || reg_offset == 0) {
+		ret = -EINVAL;
+		goto done;
+	} else {
+		saved_reg_type = reg_type;
+		saved_reg_offset = reg_offset;
+		saved_reg_value = reg_value;
+		ret = count;
+	}
+done:
+	free_page(addr);
+	return ret;
+}
+
+/*
+ * Proc regrdwr file read handler.
+ *
+ * This function is called when the 'regrdwr' file is opened for reading
+ *
+ * This function can be used to read from a register.
+ */
+static ssize_t
+mwifiex_regrdwr_read(struct file *file, char __user *ubuf,
+		     size_t count, loff_t *ppos)
+{
+	struct mwifiex_private *priv =
+		(struct mwifiex_private *) file->private_data;
+	unsigned long addr = get_zeroed_page(GFP_KERNEL);
+	char *buf = (char *) addr;
+	int pos = 0, ret = 0;
+	u32 reg_value;
+
+	if (!buf)
+		return -ENOMEM;
+
+	if (!saved_reg_type) {
+		/* No command has been given */
+		pos += snprintf(buf, PAGE_SIZE, "0");
+		goto done;
+	}
+	/* Set command has been given */
+	if (saved_reg_value != UINT_MAX) {
+		ret = mwifiex_reg_write(priv, saved_reg_type, saved_reg_offset,
+					saved_reg_value);
+
+		pos += snprintf(buf, PAGE_SIZE, "%u 0x%x 0x%x\n",
+				saved_reg_type, saved_reg_offset,
+				saved_reg_value);
+
+		ret = simple_read_from_buffer(ubuf, count, ppos, buf, pos);
+
+		goto done;
+	}
+	/* Get command has been given */
+	ret = mwifiex_reg_read(priv, saved_reg_type,
+			       saved_reg_offset, &reg_value);
+	if (ret) {
+		ret = -EINVAL;
+		goto done;
+	}
+
+	pos += snprintf(buf, PAGE_SIZE, "%u 0x%x 0x%x\n", saved_reg_type,
+			saved_reg_offset, reg_value);
+
+	ret = simple_read_from_buffer(ubuf, count, ppos, buf, pos);
+
+done:
+	free_page(addr);
+	return ret;
+}
+
+static u32 saved_offset = -1, saved_bytes = -1;
+
+/*
+ * Proc rdeeprom file write handler.
+ *
+ * This function is called when the 'rdeeprom' file is opened for writing
+ *
+ * This function can be used to write to a RDEEPROM location.
+ */
+static ssize_t
+mwifiex_rdeeprom_write(struct file *file,
+		       const char __user *ubuf, size_t count, loff_t *ppos)
+{
+	unsigned long addr = get_zeroed_page(GFP_KERNEL);
+	char *buf = (char *) addr;
+	size_t buf_size = min(count, (size_t) (PAGE_SIZE - 1));
+	int ret = 0;
+	int offset = -1, bytes = -1;
+
+	if (!buf)
+		return -ENOMEM;
+
+
+	if (copy_from_user(buf, ubuf, buf_size)) {
+		ret = -EFAULT;
+		goto done;
+	}
+
+	sscanf(buf, "%d %d", &offset, &bytes);
+
+	if (offset == -1 || bytes == -1) {
+		ret = -EINVAL;
+		goto done;
+	} else {
+		saved_offset = offset;
+		saved_bytes = bytes;
+		ret = count;
+	}
+done:
+	free_page(addr);
+	return ret;
+}
+
+/*
+ * Proc rdeeprom read write handler.
+ *
+ * This function is called when the 'rdeeprom' file is opened for reading
+ *
+ * This function can be used to read from a RDEEPROM location.
+ */
+static ssize_t
+mwifiex_rdeeprom_read(struct file *file, char __user *ubuf,
+		      size_t count, loff_t *ppos)
+{
+	struct mwifiex_private *priv =
+		(struct mwifiex_private *) file->private_data;
+	unsigned long addr = get_zeroed_page(GFP_KERNEL);
+	char *buf = (char *) addr;
+	int pos = 0, ret = 0, i = 0;
+	u8 value[MAX_EEPROM_DATA];
+
+	if (!buf)
+		return -ENOMEM;
+
+	if (saved_offset == -1) {
+		/* No command has been given */
+		pos += snprintf(buf, PAGE_SIZE, "0");
+		goto done;
+	}
+
+	/* Get command has been given */
+	ret = mwifiex_eeprom_read(priv, (u16) saved_offset,
+				  (u16) saved_bytes, value);
+	if (ret) {
+		ret = -EINVAL;
+		goto done;
+	}
+
+	pos += snprintf(buf, PAGE_SIZE, "%d %d ", saved_offset, saved_bytes);
+
+	for (i = 0; i < saved_bytes; i++)
+		pos += snprintf(buf + strlen(buf), PAGE_SIZE, "%d ", value[i]);
+
+	ret = simple_read_from_buffer(ubuf, count, ppos, buf, pos);
+
+done:
+	free_page(addr);
+	return ret;
+}
+
+
+#define MWIFIEX_DFS_ADD_FILE(name) do {                                 \
+	if (!debugfs_create_file(#name, 0644, priv->dfs_dev_dir,        \
+			priv, &mwifiex_dfs_##name##_fops))              \
+		return;                                                 \
+} while (0);
+
+#define MWIFIEX_DFS_FILE_OPS(name)                                      \
+static const struct file_operations mwifiex_dfs_##name##_fops = {       \
+	.read = mwifiex_##name##_read,                                  \
+	.write = mwifiex_##name##_write,                                \
+	.open = mwifiex_open_generic,                                   \
+};
+
+#define MWIFIEX_DFS_FILE_READ_OPS(name)                                 \
+static const struct file_operations mwifiex_dfs_##name##_fops = {       \
+	.read = mwifiex_##name##_read,                                  \
+	.open = mwifiex_open_generic,                                   \
+};
+
+#define MWIFIEX_DFS_FILE_WRITE_OPS(name)                                \
+static const struct file_operations mwifiex_dfs_##name##_fops = {       \
+	.write = mwifiex_##name##_write,                                \
+	.open = mwifiex_open_generic,                                   \
+};
+
+
+MWIFIEX_DFS_FILE_READ_OPS(info);
+MWIFIEX_DFS_FILE_READ_OPS(debug);
+MWIFIEX_DFS_FILE_READ_OPS(getlog);
+MWIFIEX_DFS_FILE_OPS(regrdwr);
+MWIFIEX_DFS_FILE_OPS(rdeeprom);
+
+/*
+ * This function creates the debug FS directory structure and the files.
+ */
+void
+mwifiex_dev_debugfs_init(struct mwifiex_private *priv)
+{
+	if (!mwifiex_dfs_dir || !priv)
+		return;
+
+	priv->dfs_dev_dir = debugfs_create_dir(priv->netdev->name,
+					       mwifiex_dfs_dir);
+
+	if (!priv->dfs_dev_dir)
+		return;
+
+	MWIFIEX_DFS_ADD_FILE(info);
+	MWIFIEX_DFS_ADD_FILE(debug);
+	MWIFIEX_DFS_ADD_FILE(getlog);
+	MWIFIEX_DFS_ADD_FILE(regrdwr);
+	MWIFIEX_DFS_ADD_FILE(rdeeprom);
+
+	return;
+}
+
+/*
+ * This function removes the debug FS directory structure and the files.
+ */
+void
+mwifiex_dev_debugfs_remove(struct mwifiex_private *priv)
+{
+	if (!priv)
+		return;
+
+	debugfs_remove_recursive(priv->dfs_dev_dir);
+	return;
+}
+
+/*
+ * This function creates the top level proc directory.
+ */
+void
+mwifiex_debugfs_init(void)
+{
+	if (!mwifiex_dfs_dir)
+		mwifiex_dfs_dir = debugfs_create_dir("mwifiex", NULL);
+}
+
+/*
+ * This function removes the top level proc directory.
+ */
+void
+mwifiex_debugfs_remove(void)
+{
+	if (mwifiex_dfs_dir)
+		debugfs_remove(mwifiex_dfs_dir);
+}