diff --git a/MAINTAINERS b/MAINTAINERS
index c80f87d7258c..17955b8497df 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -14108,6 +14108,11 @@ T:	git git://linuxtv.org/media_tree.git
 F:	Documentation/admin-guide/media/pulse8-cec.rst
 F:	drivers/media/cec/usb/pulse8/
 
+PUREILIFI USB DRIVER
+M:	Srinivasan Raju <srini.raju@purelifi.com>
+S:	Supported
+F:	drivers/net/wireless/purelifi
+
 PVRUSB2 VIDEO4LINUX DRIVER
 M:	Mike Isely <isely@pobox.com>
 L:	pvrusb2@isely.net	(subscribers-only)
diff --git a/drivers/net/wireless/Kconfig b/drivers/net/wireless/Kconfig
index 170a64e67709..b87da3139f94 100644
--- a/drivers/net/wireless/Kconfig
+++ b/drivers/net/wireless/Kconfig
@@ -48,6 +48,7 @@ source "drivers/net/wireless/st/Kconfig"
 source "drivers/net/wireless/ti/Kconfig"
 source "drivers/net/wireless/zydas/Kconfig"
 source "drivers/net/wireless/quantenna/Kconfig"
+source "drivers/net/wireless/purelifi/Kconfig"
 
 config PCMCIA_RAYCS
 	tristate "Aviator/Raytheon 2.4GHz wireless support"
diff --git a/drivers/net/wireless/Makefile b/drivers/net/wireless/Makefile
index 80b324499786..e9fc770026f0 100644
--- a/drivers/net/wireless/Makefile
+++ b/drivers/net/wireless/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_WLAN_VENDOR_ST) += st/
 obj-$(CONFIG_WLAN_VENDOR_TI) += ti/
 obj-$(CONFIG_WLAN_VENDOR_ZYDAS) += zydas/
 obj-$(CONFIG_WLAN_VENDOR_QUANTENNA) += quantenna/
+obj-$(CONFIG_WLAN_VENDOR_PURELIFI) += purelifi/
 
 # 16-bit wireless PCMCIA client drivers
 obj-$(CONFIG_PCMCIA_RAYCS)	+= ray_cs.o
diff --git a/drivers/net/wireless/purelifi/Kconfig b/drivers/net/wireless/purelifi/Kconfig
new file mode 100644
index 000000000000..f6630791df9d
--- /dev/null
+++ b/drivers/net/wireless/purelifi/Kconfig
@@ -0,0 +1,27 @@
+# SPDX-License-Identifier: GPL-2.0
+config WLAN_VENDOR_PURELIFI
+	bool "pureLiFi devices"
+	default y
+	help
+	  If you have a pureLiFi device, say Y.
+
+	  Note that the answer to this question doesn't directly affect the
+	  kernel: saying N will just cause the configurator to skip all the
+	  questions about these cards. If you say Y, you will be asked for
+	  your specific card in the following questions.
+
+if WLAN_VENDOR_PURELIFI
+
+config PURELIFI
+
+	tristate "pureLiFi device support"
+	depends on CFG80211 && MAC80211 && USB
+	help
+	   This driver makes the adapter appear as a normal WLAN interface.
+
+	   The pureLiFi device requires external STA firmware to be loaded.
+
+	   To compile this driver as a module, choose M here: the module will
+	   be called purelifi.
+
+endif # WLAN_VENDOR_PURELIFI
diff --git a/drivers/net/wireless/purelifi/Makefile b/drivers/net/wireless/purelifi/Makefile
new file mode 100644
index 000000000000..cf9b931840ac
--- /dev/null
+++ b/drivers/net/wireless/purelifi/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_PURELIFI)		:= purelifi.o
+purelifi-objs 		+= chip.o usb.o mac.o firmware.o dbgfs.o
diff --git a/drivers/net/wireless/purelifi/chip.c b/drivers/net/wireless/purelifi/chip.c
new file mode 100644
index 000000000000..9a7ccd0f98f2
--- /dev/null
+++ b/drivers/net/wireless/purelifi/chip.c
@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+
+#include "chip.h"
+#include "mac.h"
+#include "usb.h"
+
+void purelifi_chip_init(struct purelifi_chip *chip,
+			struct ieee80211_hw *hw,
+			struct usb_interface *intf)
+{
+	memset(chip, 0, sizeof(*chip));
+	mutex_init(&chip->mutex);
+	purelifi_usb_init(&chip->usb, hw, intf);
+}
+
+void purelifi_chip_release(struct purelifi_chip *chip)
+{
+	purelifi_usb_release(&chip->usb);
+	mutex_destroy(&chip->mutex);
+}
+
+int purelifi_set_beacon_interval(struct purelifi_chip *chip, u16 interval,
+				 u8 dtim_period, int type)
+{
+	if (!interval ||
+	    (chip->beacon_set && chip->beacon_interval == interval)) {
+		return 0;
+	}
+
+	chip->beacon_interval = interval;
+	chip->beacon_set = true;
+	return usb_write_req((const u8 *)&chip->beacon_interval,
+			     sizeof(chip->beacon_interval),
+			     USB_REQ_BEACON_INTERVAL_WR);
+}
+
+int purelifi_chip_init_hw(struct purelifi_chip *chip)
+{
+	u8 *addr = purelifi_mac_get_perm_addr(purelifi_chip_to_mac(chip));
+	struct usb_device *udev = interface_to_usbdev(chip->usb.intf);
+
+	pr_info("purelifi chip %02x:%02x v%02x  %02x-%02x-%02x %s\n",
+		le16_to_cpu(udev->descriptor.idVendor),
+		le16_to_cpu(udev->descriptor.idProduct),
+		le16_to_cpu(udev->descriptor.bcdDevice),
+		addr[0], addr[1], addr[2],
+		purelifi_speed(udev->speed));
+
+	return purelifi_set_beacon_interval(chip, 100, 0, 0);
+}
+
+int purelifi_chip_switch_radio(struct purelifi_chip *chip, u32 value)
+{
+	int r;
+
+	r = usb_write_req((const u8 *)&value, sizeof(value), USB_REQ_POWER_WR);
+	if (r)
+		dev_err(purelifi_chip_dev(chip), "POWER_WR failed (%d)\n", r);
+	return r;
+}
+
+int purelifi_chip_enable_rxtx(struct purelifi_chip *chip)
+{
+	purelifi_usb_enable_tx(&chip->usb);
+	return purelifi_usb_enable_rx(&chip->usb);
+}
+
+void purelifi_chip_disable_rxtx(struct purelifi_chip *chip)
+{
+	static const u8 value;
+
+	usb_write_req(&value, sizeof(value), USB_REQ_RXTX_WR);
+	purelifi_usb_disable_rx(&chip->usb);
+	purelifi_usb_disable_tx(&chip->usb);
+}
+
+int purelifi_chip_set_rate(struct purelifi_chip *chip, u8 rate)
+{
+	int r;
+
+	if (!chip)
+		return -EINVAL;
+
+	r = usb_write_req(&rate, sizeof(rate), USB_REQ_RATE_WR);
+	if (r)
+		dev_err(purelifi_chip_dev(chip), "RATE_WR failed (%d)\n", r);
+	return r;
+}
+
+MODULE_LICENSE("GPL");
diff --git a/drivers/net/wireless/purelifi/chip.h b/drivers/net/wireless/purelifi/chip.h
new file mode 100644
index 000000000000..710bf713b8c4
--- /dev/null
+++ b/drivers/net/wireless/purelifi/chip.h
@@ -0,0 +1,81 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef _LF_X_CHIP_H
+#define _LF_X_CHIP_H
+
+#include <net/mac80211.h>
+
+#include "usb.h"
+
+enum unit_type_t {
+	STA = 0,
+	AP = 1,
+};
+
+struct purelifi_chip {
+	struct purelifi_usb usb;
+	struct mutex mutex; /* lock to protect chip data */
+	enum unit_type_t unit_type;
+	u16 link_led;
+	u8  beacon_set;
+	u16 beacon_interval;
+};
+
+struct purelifi_mc_hash {
+	u32 low;
+	u32 high;
+};
+
+#define purelifi_chip_dev(chip) (&(chip)->usb.intf->dev)
+
+void purelifi_chip_init(struct purelifi_chip *chip,
+			struct ieee80211_hw *hw,
+			struct usb_interface *intf);
+
+void purelifi_chip_release(struct purelifi_chip *chip);
+
+void purelifi_chip_disable_rxtx(struct purelifi_chip *chip);
+
+int purelifi_chip_init_hw(struct purelifi_chip *chip);
+
+int purelifi_chip_enable_rxtx(struct purelifi_chip *chip);
+
+int purelifi_chip_set_rate(struct purelifi_chip *chip, u8 rate);
+
+int purelifi_set_beacon_interval(struct purelifi_chip *chip, u16 interval,
+				 u8 dtim_period, int type);
+
+int purelifi_chip_switch_radio(struct purelifi_chip *chip, u32 value);
+
+static inline struct purelifi_chip *purelifi_usb_to_chip(struct purelifi_usb
+							 *usb)
+{
+	return container_of(usb, struct purelifi_chip, usb);
+}
+
+static inline void purelifi_mc_clear(struct purelifi_mc_hash *hash)
+{
+	hash->low = 0;
+	/* The interfaces must always received broadcasts.
+	 * The hash of the broadcast address ff:ff:ff:ff:ff:ff is 63.
+	 */
+	hash->high = 0x80000000;
+}
+
+static inline void purelifi_mc_add_all(struct purelifi_mc_hash *hash)
+{
+	hash->low = 0xffffffff;
+	hash->high = 0xffffffff;
+}
+
+static inline void purelifi_mc_add_addr(struct purelifi_mc_hash *hash,
+					u8 *addr)
+{
+	unsigned int i = addr[5] >> 2;
+
+	if (i < 32)
+		hash->low |= 1 << i;
+	else
+		hash->high |= 1 << (i - 32);
+}
+#endif /* _LF_X_CHIP_H */
diff --git a/drivers/net/wireless/purelifi/dbgfs.c b/drivers/net/wireless/purelifi/dbgfs.c
new file mode 100644
index 000000000000..d617e4b41c5e
--- /dev/null
+++ b/drivers/net/wireless/purelifi/dbgfs.c
@@ -0,0 +1,150 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/proc_fs.h>
+#include <linux/fs.h>
+#include "mac.h"
+#include "usb.h"
+
+ssize_t purelifi_store_frequency(struct device *dev,
+				 struct device_attribute *attr,
+				 const char *buf,
+				 size_t len)
+{
+	int i, r, row, col, predivider, feedback_divider, output_div_0;
+	int output_div_1, output_div_2, clkout3_phase;
+	char values[6][4] = {{0}, {0} };
+	char usr_input[8] = {0};
+	bool valid = false;
+
+	row = 0; col = 0;
+	for (i = 0; i < min(len, sizeof(values)); i++) {
+		values[row][col] = buf[i];
+		col++;
+		if (buf[i] == 0x20) {
+			row++;
+			col = 0;
+		} else if (buf[i] == 0x0A) {
+			if (row == 5 && col > 0) {
+				int *index[] = {
+					&predivider,
+					&feedback_divider,
+					&output_div_0,
+					&output_div_1,
+					&output_div_2,
+					&clkout3_phase
+				};
+				valid = true;
+				i = 0;
+				while (valid && i < ARRAY_SIZE(index)) {
+					if (kstrtouint(&values[i][0], 0,
+						       index[i]))
+						valid = false;
+					i++;
+				}
+				break;
+			}
+		}
+	}
+
+	if (valid) {
+		usr_input[0] = (char)predivider;
+		usr_input[1] = (char)feedback_divider;
+		usr_input[2] = (char)output_div_0;
+		usr_input[3] = (char)output_div_1;
+		usr_input[4] = (char)output_div_2;
+		usr_input[5] = (char)clkout3_phase;
+
+		dev_info(dev, "options IP_DIV: %d VCO_MULT: %d OP_DIV_PHY: %d",
+			 usr_input[0], usr_input[1], usr_input[2]);
+		dev_info(dev, "OP_DIV_CPU: %d OP_DIV_USB: %d CLK3_PH: %d\n",
+			 usr_input[3], usr_input[4], usr_input[5]);
+
+		r = usb_write_req((const u8 *)&usr_input[0],
+				  sizeof(usr_input), USB_REQ_SET_FREQ);
+		if (r < 0)
+			dev_err(dev, "SET_FREQ failed (%d)\n", r);
+	} else {
+		dev_err(dev, "Your options are invalid\n");
+	}
+
+	return len;
+}
+
+ssize_t purelifi_show_sysfs(struct device *dev,
+			    struct device_attribute *attr,
+			    char *buf)
+{
+	return 0;
+}
+
+ssize_t purelifi_store_modulation(struct device *dev,
+				  struct device_attribute *attr,
+				  const char *buf, size_t len)
+{
+	int rate, i;
+	char usr_input[8] = {0, 0, 0, 0, 0, 0, 0, 0};
+	int rv = 0;
+
+	for (i = 0; i < min(len, sizeof(usr_input)); i++)
+		usr_input[i] = buf[i];
+	usr_input[7] = 0;
+	rv = sscanf((char *)&usr_input[0], "%d", &rate);
+	if (rv != 1)
+		return 0;
+	purelifi_chip_set_rate(NULL, rate);
+	return len;
+}
+
+ssize_t purelifi_show_modulation(struct device *dev,
+				 struct device_attribute *attr,
+				 char *buf)
+{
+	return 0;
+}
+
+void create_config(struct usb_interface *intf)
+{
+	struct device *dev;
+
+	dev = &intf->dev;
+	if (device_create_file(dev, &purelifi_attr_modulation)) {
+		dev_err(&intf->dev,
+			"failed to create modulation sysfs entry\n");
+		return;
+	}
+	if (device_create_file(dev, &purelifi_attr_frequency)) {
+		device_remove_file(dev, &purelifi_attr_modulation);
+		dev_err(&intf->dev,
+			"failed to create frequency sysfs entry\n");
+	}
+}
+
+int modulation_open(struct inode *inode_p, struct file *file_p)
+{
+	return 0;
+}
+
+ssize_t modulation_read(struct file *file_p,
+			char __user *user_p,
+			size_t offset, loff_t *off_p)
+{
+	return 0;
+}
+
+ssize_t modulation_write(struct file *file_p,
+			 const char __user *buffer,
+			 size_t count, loff_t *actual_data_written)
+{
+	int rate;
+	char usr_input[8] = {0, 0, 0, 0, 0, 0, 0, 0};
+	int rv = 0;
+
+	if (copy_from_user(usr_input, buffer, min(count, sizeof(usr_input))))
+		return -EFAULT;
+	usr_input[7] = 0;
+	rv = sscanf((char *)&usr_input[0], "%d", &rate);
+	if (rv != 1)
+		return 0;
+	purelifi_chip_set_rate(NULL, rate);
+	return count;
+}
diff --git a/drivers/net/wireless/purelifi/firmware.c b/drivers/net/wireless/purelifi/firmware.c
new file mode 100644
index 000000000000..3a9a43b45f45
--- /dev/null
+++ b/drivers/net/wireless/purelifi/firmware.c
@@ -0,0 +1,384 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/firmware.h>
+
+#include "mac.h"
+#include "usb.h"
+
+static int send_vendor_request(struct usb_device *udev, int request,
+			       unsigned char *buffer, int buffer_size)
+{
+	return usb_control_msg(udev,
+			       usb_rcvctrlpipe(udev, 0),
+			       request, 0xC0, 0, 0,
+			       buffer, buffer_size, 1000);
+}
+
+static int send_vendor_command(struct usb_device *udev, int request,
+			       unsigned char *buffer, int buffer_size)
+{
+	return usb_control_msg(udev,
+			       usb_sndctrlpipe(udev, 0),
+			       request, USB_TYPE_VENDOR /*0x40*/, 0, 0,
+			       buffer, buffer_size, 1000);
+}
+
+int download_fpga(struct usb_interface *intf)
+{
+	int r, actual_length;
+	int fw_data_i, blk_tran_len = 16384;
+	const char *fw_name;
+	unsigned char fpga_setting[2];
+	unsigned char *fpga_dmabuff;
+	unsigned char *fw_data;
+	unsigned char fpga_state[9];
+	struct firmware *fw = NULL;
+	struct usb_device *udev = interface_to_usbdev(intf);
+
+	if ((le16_to_cpu(udev->descriptor.idVendor) ==
+				PURELIFI_X_VENDOR_ID_0) &&
+	    (le16_to_cpu(udev->descriptor.idProduct) ==
+				PURELIFI_X_PRODUCT_ID_0)) {
+		fw_name = "purelifi/li_fi_x/LiFi-X.bit";
+		dev_info(&intf->dev, "bit file for X selected\n");
+
+	} else if ((le16_to_cpu(udev->descriptor.idVendor)) ==
+					PURELIFI_XC_VENDOR_ID_0 &&
+		   (le16_to_cpu(udev->descriptor.idProduct) ==
+					PURELIFI_XC_PRODUCT_ID_0)) {
+		fw_name = "purelifi/li_fi_x/LiFi-XC.bit";
+		dev_info(&intf->dev, "bit file for XC selected\n");
+
+	} else {
+		r = -EINVAL;
+		goto error;
+	}
+
+	r = request_firmware((const struct firmware **)&fw, fw_name,
+			     &intf->dev);
+	if (r) {
+		dev_err(&intf->dev, "request_firmware failed (%d)\n", r);
+		goto error;
+	}
+	fpga_dmabuff = NULL;
+	fpga_dmabuff = kmalloc(2, GFP_KERNEL);
+
+	if (!fpga_dmabuff) {
+		r = -ENOMEM;
+		goto error_free_fw;
+	}
+	send_vendor_request(udev, 0x33, fpga_dmabuff, sizeof(fpga_setting));
+	memcpy(fpga_setting, fpga_dmabuff, 2);
+	kfree(fpga_dmabuff);
+
+	send_vendor_command(udev, 0x34, NULL, 0);
+
+	if (fpga_setting[0] != 6) {
+		dev_err(&intf->dev, "fpga_setting[0] is wrong\n");
+		r = -EINVAL;
+		goto error_free_fw;
+	}
+
+	for (fw_data_i = 0; fw_data_i < fw->size;) {
+		int tbuf_idx;
+
+		if ((fw->size - fw_data_i) < blk_tran_len)
+			blk_tran_len = fw->size - fw_data_i;
+
+		fw_data = kmemdup(&fw->data[fw_data_i], blk_tran_len,
+				  GFP_KERNEL);
+
+		for (tbuf_idx = 0; tbuf_idx < blk_tran_len; tbuf_idx++) {
+			fw_data[tbuf_idx] =
+				((fw_data[tbuf_idx] & 128) >> 7) |
+				((fw_data[tbuf_idx] &  64) >> 5) |
+				((fw_data[tbuf_idx] &  32) >> 3) |
+				((fw_data[tbuf_idx] &  16) >> 1) |
+				((fw_data[tbuf_idx] &   8) << 1) |
+				((fw_data[tbuf_idx] &   4) << 3) |
+				((fw_data[tbuf_idx] &   2) << 5) |
+				((fw_data[tbuf_idx] &   1) << 7);
+		}
+		r = usb_bulk_msg(udev,
+				 usb_sndbulkpipe(interface_to_usbdev(intf),
+						 fpga_setting[0] & 0xFF),
+				 fw_data,
+				 blk_tran_len,
+				 &actual_length,
+				 2000);
+
+		if (r)
+			dev_err(&intf->dev, "Bulk msg failed (%d)\n", r);
+
+		kfree(fw_data);
+		fw_data_i += blk_tran_len;
+	}
+
+	fpga_dmabuff = NULL;
+	fpga_dmabuff = kmalloc(9, GFP_KERNEL);
+	if (!fpga_dmabuff) {
+		r = -ENOMEM;
+		goto error_free_fw;
+	}
+	memset(fpga_dmabuff, 0xFF, 9);
+
+	send_vendor_request(udev, 0x30, fpga_dmabuff, sizeof(fpga_state));
+
+	dev_info(&intf->dev, "fpga status: %x %x %x %x %x %x %x %x\n",
+		 fpga_dmabuff[0], fpga_dmabuff[1],
+		 fpga_dmabuff[2], fpga_dmabuff[3],
+		 fpga_dmabuff[4], fpga_dmabuff[5],
+		 fpga_dmabuff[6], fpga_dmabuff[7]);
+
+	if (fpga_dmabuff[0] != 0) {
+		r = -EINVAL;
+		kfree(fpga_dmabuff);
+		goto error_free_fw;
+	}
+
+	kfree(fpga_dmabuff);
+
+	send_vendor_command(udev, 0x35, NULL, 0);
+
+	msleep(200);
+
+error_free_fw:
+	release_firmware(fw);
+error:
+	return r;
+}
+
+int download_xl_firmware(struct usb_interface *intf)
+{
+	int r;
+
+	struct firmware *fw_packed = NULL;
+	int step;
+	u8 *buf;
+	u32 size, nmb_of_control_packets, i, no_of_files;
+	u32 tot_size, start_addr;
+	const char *fw_pack;
+	struct usb_device *udev = interface_to_usbdev(intf);
+
+	r = send_vendor_command(udev, 0x80, NULL, 0);
+	msleep(100);
+
+	/* Code for single pack file download */
+
+	fw_pack = "purelifi/li_fi_x/LiFi-XL.bin";
+
+	r = request_firmware((const struct firmware **)&fw_packed, fw_pack,
+			     &intf->dev);
+	if (r) {
+		dev_err(&intf->dev, "request_firmware failed (%d)\n", r);
+		goto error;
+	}
+	no_of_files = *(u32 *)&fw_packed->data[0];
+	tot_size = fw_packed->size;
+	dev_dbg(&intf->dev, "XL Firmware (%d, %d)\n", no_of_files, tot_size);
+	buf = kzalloc(64, GFP_KERNEL);
+	if (!buf) {
+		r = -ENOMEM;
+		goto error;
+	}
+
+	for (step = 0; step < no_of_files; step++) {
+		buf[0] = step;
+		r = send_vendor_command(udev, 0x82, buf, 64);
+
+		if (step < no_of_files - 1)
+			size = *(u32 *)&fw_packed->data[4 + ((step + 1) * 4)]
+				- *(u32 *)&fw_packed->data[4 + (step) * 4];
+		else
+			size = tot_size -
+				*(u32 *)&fw_packed->data[4 + (step) * 4];
+
+		start_addr = *(u32 *)&fw_packed->data[4 + (step * 4)];
+
+		if ((size % 64) && step < 2)
+			size += 64 - size % 64;
+		nmb_of_control_packets = size / 64;
+
+		for (i = 0; i < nmb_of_control_packets; i++) {
+			memcpy(buf,
+			       &fw_packed->data[start_addr + (i * 64)], 64);
+			r = send_vendor_command(udev, 0x81, buf, 64);
+		}
+		dev_info(&intf->dev, "fw-dw step=%d,r=%d size=%d\n", step, r,
+			 size);
+	}
+	release_firmware(fw_packed);
+	kfree(buf);
+
+	/* Code for single pack file download ends fw download finish*/
+
+	r = send_vendor_command(udev, 0x83, NULL, 0);
+	dev_info(&intf->dev, "download_fpga (4) (%d)\n", r);
+error:
+	return r;
+}
+
+struct flash_t {
+	unsigned char enabled;
+	unsigned int sector_size;
+	unsigned int sectors;
+	unsigned char ec;
+};
+
+#ifdef LOAD_MAC_AND_SERIAL_FROM_FILE
+int upload_mac_and_serial(struct usb_interface *intf,
+			  unsigned char *hw_address,
+			  unsigned char *serial_number)
+{
+	struct usb_device *udev = interface_to_usbdev(intf);
+	struct firmware *fw = NULL;
+	char *mac_file_name = "purelifi/li_fi_x/mac.ascii";
+	char *serial_file_name = "purelifi/li_fi_x/serial.ascii";
+	int r;
+
+	r = request_firmware((const struct firmware **)&fw, mac_file_name,
+			     &intf->dev);
+	if (r) {
+		dev_err(&intf->dev, "request_firmware fail (%d)\n", r);
+		goto ERROR;
+	}
+	dev_info(&intf->dev, "fw->data=%s\n", fw->data);
+	r = sscanf(fw->data,
+		   "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
+		    &hw_address[0], &hw_address[1],
+		    &hw_address[2], &hw_address[3],
+		    &hw_address[4], &hw_address[5]);
+	if (r != 6) {
+		dev_err(&intf->dev, "fw_dw - usage args fail (%d)\n", r);
+		goto ERROR;
+	}
+	release_firmware(fw);
+
+	r = request_firmware((const struct firmware **)&fw, serial_file_name,
+			     &intf->dev);
+	if (r) {
+		dev_err(&intf->dev, "request_firmware fail (%d)\n", r);
+		goto ERROR;
+	}
+	dev_info(&intf->dev, "fw->data=%s\n", fw->data);
+	strlcpy(serial_number, fw->data, PURELIFI_SERIAL_LEN);
+	dev_info(&intf->dev, "serial_number=%s\n", serial_number);
+	release_firmware(fw);
+	dev_info(&intf->dev, "hw_address=%pM\n", hw_address);
+ERROR:
+	return r;
+}
+#endif
+
+#ifdef LOAD_MAC_AND_SERIAL_FROM_FLASH
+int upload_mac_and_serial(struct usb_interface *intf,
+			  unsigned char *hw_address,
+			  unsigned char *serial_number)
+{
+#define FLASH_EC_BUSY 3
+	struct usb_device *udev = interface_to_usbdev(intf);
+	struct flash_t flash;
+	unsigned char *flash_sector_buf;
+	unsigned int sector_index;
+
+	do {
+		unsigned char buf[8];
+
+		msleep(200);
+
+		send_vendor_request(udev, 0x40, buf, sizeof(buf));
+		flash.enabled = buf[0] & 0xFF;
+
+		if (flash.enabled) {
+			flash.sectors = ((buf[6] & 255) << 24) |
+				((buf[5] & 255) << 16) |
+				((buf[4] & 255) <<  8) |
+				(buf[3] & 255);
+
+			flash.sector_size =
+				((buf[2] & 255) << 8) | (buf[1] & 255);
+		} else {
+			flash.sectors = 0;
+			flash.sector_size = 0;
+		}
+
+		if (flash.sector_size & 0x8000)
+			flash.sector_size = 1 << (flash.sector_size & 0x7FFF);
+
+		flash.ec = buf[7] & 0xFF;
+	} while (flash.ec == FLASH_EC_BUSY);
+
+	flash_sector_buf = kmalloc(flash.sector_size,
+				   GFP_KERNEL);
+	if (!flash_sector_buf)
+		return -ENOMEM;
+
+	if (!flash.enabled) {
+		dev_err(&intf->dev, "Flash is not enabled\n");
+		return -EINVAL;
+	}
+
+	read_flash(intf, &flash, 0, flash_sector_buf);
+	sector_index = *((unsigned int *)flash_sector_buf);
+
+	read_flash(intf, &flash, sector_index, flash_sector_buf);
+	memcpy(hw_address, flash_sector_buf, ETH_ALEN);
+	strncpy(serial_number, &flash_sector_buf[ETH_ALEN], 256);
+
+	dev_info(&intf->dev, "hw_address=%pM\n", hw_address);
+	kfree(flash_sector_buf);
+	return 0;
+}
+
+#endif
+
+#ifdef LOAD_MAC_AND_SERIAL_FROM_EP0
+int upload_mac_and_serial(struct usb_interface *intf,
+			  unsigned char *hw_address,
+			unsigned char *serial_number)
+{
+#define USB_MAC_VENDOR_REQUEST 0x36
+#define USB_SERIAL_NUMBER_VENDOR_REQUEST 0x37
+#define USB_FIRMWARE_VERSION_VENDOR_REQUEST 0x39
+#define SERIAL_NUMBER_LENGTH 14
+	struct usb_device *udev = interface_to_usbdev(intf);
+	int r = 0;
+	unsigned char *dma_buffer = NULL;
+	unsigned long long firmware_version;
+
+	dma_buffer = kmalloc(14, GFP_KERNEL);
+	if (!dma_buffer) {
+		r = -ENOMEM;
+		goto error;
+	}
+
+	send_vendor_request(udev, USB_MAC_VENDOR_REQUEST, dma_buffer,
+			    ETH_ALEN);
+
+	memcpy(hw_address, dma_buffer, ETH_ALEN);
+
+	send_vendor_request(udev, USB_SERIAL_NUMBER_VENDOR_REQUEST,
+			    dma_buffer, 14);
+
+	send_vendor_request(udev, USB_SERIAL_NUMBER_VENDOR_REQUEST,
+			    dma_buffer, 14);
+
+	memcpy(serial_number, dma_buffer, SERIAL_NUMBER_LENGTH);
+
+	memset(dma_buffer, 0x00, 14);
+
+	send_vendor_request(udev, USB_FIRMWARE_VERSION_VENDOR_REQUEST,
+			    (unsigned char *)dma_buffer, 8);
+
+	memcpy(&firmware_version, dma_buffer, sizeof(unsigned long long));
+
+	dev_info(&intf->dev, "Firmware Version: %llu, Revision: 16418\n",
+		 firmware_version);
+	kfree(dma_buffer);
+
+	dev_info(&intf->dev, "hw_address=%pM\n", hw_address);
+error:
+	return r;
+}
+
+#endif
diff --git a/drivers/net/wireless/purelifi/intf.h b/drivers/net/wireless/purelifi/intf.h
new file mode 100644
index 000000000000..df0d87331ad7
--- /dev/null
+++ b/drivers/net/wireless/purelifi/intf.h
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef _PURELIFI_MAC_DRIVER_USB_INTERFACE
+#define _PURELIFI_MAC_DRIVER_USB_INTERFACE
+#define PURELIFI_BYTE_NUM_ALIGNMENT 4
+#ifndef ETH_ALEN
+#define ETH_ALEN 6
+#endif
+#define AP_USER_LIMIT 8
+
+struct rx_status {
+	u16 rssi;
+	u8  rate_idx;
+	u8  pad;
+	u64 crc_error_count;
+} __packed;
+
+enum usb_req_enum_t {
+	USB_REQ_TEST_WR            = 0,
+	USB_REQ_MAC_WR             = 1,
+	USB_REQ_POWER_WR           = 2,
+	USB_REQ_RXTX_WR            = 3,
+	USB_REQ_BEACON_WR          = 4,
+	USB_REQ_BEACON_INTERVAL_WR = 5,
+	USB_REQ_RTS_CTS_RATE_WR    = 6,
+	USB_REQ_HASH_WR            = 7,
+	USB_REQ_DATA_TX            = 8,
+	USB_REQ_RATE_WR            = 9,
+	USB_REQ_SET_FREQ           = 15
+};
+
+struct usb_req_t {
+	enum usb_req_enum_t id;
+	u32            len;
+	u8             buf[512];
+};
+
+#endif
diff --git a/drivers/net/wireless/purelifi/mac.c b/drivers/net/wireless/purelifi/mac.c
new file mode 100644
index 000000000000..2966553bdc65
--- /dev/null
+++ b/drivers/net/wireless/purelifi/mac.c
@@ -0,0 +1,873 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+#include <linux/gpio.h>
+#include <linux/jiffies.h>
+#include <net/ieee80211_radiotap.h>
+
+#include "chip.h"
+#include "mac.h"
+#include "usb.h"
+
+struct plf_reg_alpha2_map {
+	u32 reg;
+	char alpha2[2];
+};
+
+static const struct plf_reg_alpha2_map reg_alpha2_map[] = {
+	{ PLF_REGDOMAIN_FCC, "US" },
+	{ PLF_REGDOMAIN_IC, "CA" },
+	{ PLF_REGDOMAIN_ETSI, "DE" }, /* Generic ETSI, use most restrictive */
+	{ PLF_REGDOMAIN_JAPAN, "JP" },
+	{ PLF_REGDOMAIN_SPAIN, "ES" },
+	{ PLF_REGDOMAIN_FRANCE, "FR" },
+};
+
+static const struct ieee80211_rate purelifi_rates[] = {
+	{ .bitrate = 10,
+		.hw_value = PURELIFI_CCK_RATE_1M,
+		.flags = 0 },
+	{ .bitrate = 20,
+		.hw_value = PURELIFI_CCK_RATE_2M,
+		.hw_value_short = PURELIFI_CCK_RATE_2M
+			| PURELIFI_CCK_PREA_SHORT,
+		.flags = IEEE80211_RATE_SHORT_PREAMBLE },
+	{ .bitrate = 55,
+		.hw_value = PURELIFI_CCK_RATE_5_5M,
+		.hw_value_short = PURELIFI_CCK_RATE_5_5M
+			| PURELIFI_CCK_PREA_SHORT,
+		.flags = IEEE80211_RATE_SHORT_PREAMBLE },
+	{ .bitrate = 110,
+		.hw_value = PURELIFI_CCK_RATE_11M,
+		.hw_value_short = PURELIFI_CCK_RATE_11M
+			| PURELIFI_CCK_PREA_SHORT,
+		.flags = IEEE80211_RATE_SHORT_PREAMBLE },
+	{ .bitrate = 60,
+		.hw_value = PURELIFI_OFDM_RATE_6M,
+		.flags = 0 },
+	{ .bitrate = 90,
+		.hw_value = PURELIFI_OFDM_RATE_9M,
+		.flags = 0 },
+	{ .bitrate = 120,
+		.hw_value = PURELIFI_OFDM_RATE_12M,
+		.flags = 0 },
+	{ .bitrate = 180,
+		.hw_value = PURELIFI_OFDM_RATE_18M,
+		.flags = 0 },
+	{ .bitrate = 240,
+		.hw_value = PURELIFI_OFDM_RATE_24M,
+		.flags = 0 },
+	{ .bitrate = 360,
+		.hw_value = PURELIFI_OFDM_RATE_36M,
+		.flags = 0 },
+	{ .bitrate = 480,
+		.hw_value = PURELIFI_OFDM_RATE_48M,
+		.flags = 0 },
+	{ .bitrate = 540,
+		.hw_value = PURELIFI_OFDM_RATE_54M,
+		.flags = 0 },
+};
+
+static const struct ieee80211_channel purelifi_channels[] = {
+	{ .center_freq = 2412, .hw_value = 1 },
+	{ .center_freq = 2417, .hw_value = 2 },
+	{ .center_freq = 2422, .hw_value = 3 },
+	{ .center_freq = 2427, .hw_value = 4 },
+	{ .center_freq = 2432, .hw_value = 5 },
+	{ .center_freq = 2437, .hw_value = 6 },
+	{ .center_freq = 2442, .hw_value = 7 },
+	{ .center_freq = 2447, .hw_value = 8 },
+	{ .center_freq = 2452, .hw_value = 9 },
+	{ .center_freq = 2457, .hw_value = 10 },
+	{ .center_freq = 2462, .hw_value = 11 },
+	{ .center_freq = 2467, .hw_value = 12 },
+	{ .center_freq = 2472, .hw_value = 13 },
+	{ .center_freq = 2484, .hw_value = 14 },
+};
+
+static int purelifi_mac_config_beacon(struct ieee80211_hw *hw,
+				      struct sk_buff *beacon, bool in_intr);
+
+static int plf_reg2alpha2(u8 regdomain, char *alpha2)
+{
+	unsigned int i;
+	const struct plf_reg_alpha2_map *reg_map;
+		for (i = 0; i < ARRAY_SIZE(reg_alpha2_map); i++) {
+			reg_map = &reg_alpha2_map[i];
+			if (regdomain == reg_map->reg) {
+				alpha2[0] = reg_map->alpha2[0];
+				alpha2[1] = reg_map->alpha2[1];
+				return 0;
+			}
+	}
+	return 1;
+}
+
+int purelifi_mac_preinit_hw(struct ieee80211_hw *hw, unsigned char *hw_address)
+{
+	SET_IEEE80211_PERM_ADDR(hw, hw_address);
+	return 0;
+}
+
+void block_queue(struct purelifi_usb *usb, const u8 *mac, bool block)
+{
+	if (block)
+		ieee80211_stop_queues(purelifi_usb_to_hw(usb));
+	else
+		ieee80211_wake_queues(purelifi_usb_to_hw(usb));
+}
+
+int purelifi_mac_init_hw(struct ieee80211_hw *hw)
+{
+	int r;
+	struct purelifi_mac *mac = purelifi_hw_mac(hw);
+	struct purelifi_chip *chip = &mac->chip;
+	char alpha2[2];
+
+	mac->default_regdomain = PLF_REGDOMAIN_ETSI;
+	r = purelifi_chip_init_hw(chip);
+	if (r) {
+		dev_warn(purelifi_mac_dev(mac), "init hw failed (%d)\n", r);
+		return r;
+	}
+
+	dev_dbg(purelifi_mac_dev(mac), "irq_disabled (%d)\n", irqs_disabled());
+	r = plf_reg2alpha2(mac->regdomain, alpha2);
+	r = regulatory_hint(hw->wiphy, alpha2);
+	return r;
+}
+
+void purelifi_mac_release(struct purelifi_mac *mac)
+{
+	purelifi_chip_release(&mac->chip);
+	lockdep_assert_held(&mac->lock);
+}
+
+int purelifi_op_start(struct ieee80211_hw *hw)
+{
+	purelifi_hw_mac(hw)->chip.usb.initialized = 1;
+	return 0;
+}
+
+void purelifi_op_stop(struct ieee80211_hw *hw)
+{
+	struct purelifi_mac *mac = purelifi_hw_mac(hw);
+
+	clear_bit(PURELIFI_DEVICE_RUNNING, &mac->flags);
+}
+
+int purelifi_restore_settings(struct purelifi_mac *mac)
+{
+	struct sk_buff *beacon;
+	int beacon_interval, beacon_period;
+
+	spin_lock_irq(&mac->lock);
+	beacon_interval = mac->beacon.interval;
+	beacon_period = mac->beacon.period;
+	spin_unlock_irq(&mac->lock);
+
+	if (mac->type != NL80211_IFTYPE_ADHOC)
+		return 0;
+
+	if (mac->vif) {
+		beacon = ieee80211_beacon_get(mac->hw, mac->vif);
+		if (beacon) {
+			purelifi_mac_config_beacon(mac->hw, beacon, false);
+			kfree_skb(beacon);
+			/* Returned skb is used only once and lowlevel
+			 *  driver is responsible for freeing it.
+			 */
+		}
+	}
+
+	purelifi_set_beacon_interval(&mac->chip, beacon_interval,
+				     beacon_period, mac->type);
+
+	spin_lock_irq(&mac->lock);
+	mac->beacon.last_update = jiffies;
+	spin_unlock_irq(&mac->lock);
+
+	return 0;
+}
+
+/**
+ * purelifi_mac_tx_status - reports tx status of a packet if required
+ * @hw - a &struct ieee80211_hw pointer
+ * @skb - a sk-buffer
+ * @flags: extra flags to set in the TX status info
+ * @ackssi: ACK signal strength
+ * @success - True for successful transmission of the frame
+ *
+ * This information calls ieee80211_tx_status_irqsafe() if required by the
+ * control information. It copies the control information into the status
+ * information.
+ *
+ * If no status information has been requested, the skb is freed.
+ */
+static void purelifi_mac_tx_status(struct ieee80211_hw *hw,
+				   struct sk_buff *skb,
+				   int ackssi,
+				   struct tx_status *tx_status)
+{
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	int success = 1, retry = 1;
+
+	ieee80211_tx_info_clear_status(info);
+
+	if (tx_status) {
+		success = !tx_status->failure;
+		retry = tx_status->retry + success;
+	}
+
+	if (success)
+		info->flags |= IEEE80211_TX_STAT_ACK;
+	else
+		info->flags &= ~IEEE80211_TX_STAT_ACK;
+
+	info->status.ack_signal = 50;
+	ieee80211_tx_status_irqsafe(hw, skb);
+}
+
+/**
+ * purelifi_mac_tx_to_dev - callback for USB layer
+ * @skb: a &sk_buff pointer
+ * @error: error value, 0 if transmission successful
+ *
+ * Informs the MAC layer that the frame has successfully transferred to the
+ * device. If an ACK is required and the transfer to the device has been
+ * successful, the packets are put on the @ack_wait_queue with
+ * the control set removed.
+ */
+void purelifi_mac_tx_to_dev(struct sk_buff *skb, int error)
+{
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	struct ieee80211_hw *hw = info->rate_driver_data[0];
+	struct purelifi_mac *mac = purelifi_hw_mac(hw);
+
+	ieee80211_tx_info_clear_status(info);
+	skb_pull(skb, sizeof(struct purelifi_ctrlset));
+
+	if (unlikely(error ||
+		     (info->flags & IEEE80211_TX_CTL_NO_ACK))) {
+		ieee80211_tx_status_irqsafe(hw, skb);
+	} else {
+		/* ieee80211_tx_status_irqsafe(hw, skb); */
+		struct sk_buff_head *q = &mac->ack_wait_queue;
+
+		skb_queue_tail(q, skb);
+		while (skb_queue_len(q)/* > PURELIFI_MAC_MAX_ACK_WAITERS*/) {
+			purelifi_mac_tx_status(hw, skb_dequeue(q),
+					       mac->ack_pending ?
+					       mac->ack_signal : 0,
+					       NULL);
+			mac->ack_pending = 0;
+		}
+	}
+}
+
+static int purelifi_mac_config_beacon(struct ieee80211_hw *hw,
+				      struct sk_buff *beacon, bool in_intr)
+{
+	return usb_write_req((const u8 *)beacon->data, beacon->len,
+			USB_REQ_BEACON_WR);
+}
+
+static int fill_ctrlset(struct purelifi_mac *mac, struct sk_buff *skb)
+{
+	unsigned int frag_len = skb->len;
+	unsigned int tmp;
+	struct purelifi_ctrlset *cs;
+
+	if (skb_headroom(skb) < sizeof(struct purelifi_ctrlset)) {
+		dev_info(purelifi_mac_dev(mac), "Not enough hroom(1)\n");
+		return 1;
+	}
+
+	cs = (struct purelifi_ctrlset *)skb_push(skb,
+			sizeof(struct purelifi_ctrlset));
+	cs->id = USB_REQ_DATA_TX;
+	cs->payload_len_nw = frag_len;
+	cs->len = cs->payload_len_nw + sizeof(struct purelifi_ctrlset)
+		- sizeof(cs->id) - sizeof(cs->len);
+
+	/* data packet lengths must be multiple of four bytes
+	 * and must not be a multiple of 512
+	 * bytes. First, it is attempted to append the
+	 * data packet in the tailroom of the skb. In rare
+	 * ocasions, the tailroom is too small. In this case,
+	 * the content of the packet is shifted into
+	 * the headroom of the skb by memcpy. Headroom is allocated
+	 * at startup (below in this file). Therefore,
+	 * there will be always enough headroom. The call skb_headroom
+	 * is an additional safety which might be
+	 * dropped.
+	 */
+
+	/*check if 32 bit aligned and align data*/
+	tmp = skb->len & 3;
+	if (tmp) {
+		if (skb_tailroom(skb) < (3 - tmp)) {
+			if (skb_headroom(skb) >= 4 - tmp) {
+				u8 len;
+				u8 *src_pt;
+				u8 *dest_pt;
+
+				len = skb->len;
+				src_pt = skb->data;
+				dest_pt = skb_push(skb, 4 - tmp);
+				memcpy(dest_pt, src_pt, len);
+			} else {
+				return 1;
+			}
+		} else {
+			skb_put(skb, 4 - tmp);
+		}
+		cs->len +=  4 - tmp;
+	}
+
+	/* check if not multiple of 512 and align data*/
+	tmp = skb->len & 0x1ff;
+	if (!tmp) {
+		if (skb_tailroom(skb) < 4) {
+			if (skb_headroom(skb) >= 4) {
+				u8 len = skb->len;
+				u8 *src_pt = skb->data;
+				u8 *dest_pt = skb_push(skb, 4);
+
+				memcpy(dest_pt, src_pt, len);
+			} else {
+				/* should never happen b/c
+				 * sufficient headroom was reserved
+				 */
+				return 1;
+			}
+		} else {
+			skb_put(skb, 4);
+		}
+		cs->len +=  4;
+	}
+
+	cs->id = TO_NETWORK(cs->id);
+	cs->len = TO_NETWORK(cs->len);
+	cs->payload_len_nw = TO_NETWORK(cs->payload_len_nw);
+
+	return 0;
+}
+
+/**
+ * purelifi_op_tx - transmits a network frame to the device
+ *
+ * @dev: mac80211 hardware device
+ * @skb: socket buffer
+ * @control: the control structure
+ *
+ * This function transmit an IEEE 802.11 network frame to the device. The
+ * control block of the skbuff will be initialized. If necessary the incoming
+ * mac80211 queues will be stopped.
+ */
+static void purelifi_op_tx(struct ieee80211_hw *hw,
+			   struct ieee80211_tx_control *control,
+			   struct sk_buff *skb)
+{
+	struct purelifi_mac *mac = purelifi_hw_mac(hw);
+	struct purelifi_usb *usb = &mac->chip.usb;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	unsigned long flags;
+	int r;
+
+	r = fill_ctrlset(mac, skb);
+	if (r)
+		goto fail;
+	info->rate_driver_data[0] = hw;
+
+	if (skb->data[24] == IEEE80211_FTYPE_DATA) {
+		u8 dst_mac[ETH_ALEN];
+		u8 sidx;
+		bool found = false;
+		struct purelifi_usb_tx *tx = &usb->tx;
+
+		memcpy(dst_mac, &skb->data[28], ETH_ALEN);
+		for (sidx = 0; sidx < MAX_STA_NUM; sidx++) {
+			if (!(tx->station[sidx].flag & STATION_CONNECTED_FLAG))
+				continue;
+			if (!memcmp(tx->station[sidx].mac, dst_mac, ETH_ALEN)) {
+				found = true;
+				break;
+			}
+		}
+
+		/* Default to broadcast address for unknown MACs */
+		if (!found)
+			sidx = STA_BROADCAST_INDEX;
+
+		/* Stop OS from sending packets, if the queue is half full */
+		if (skb_queue_len(&tx->station[sidx].data_list) > 60)
+			block_queue(usb, tx->station[sidx].mac, true);
+
+		/* Schedule packet for transmission if queue is not full */
+		if (skb_queue_len(&tx->station[sidx].data_list) < 256) {
+			skb_queue_tail(&tx->station[sidx].data_list, skb);
+			purelifi_send_packet_from_data_queue(usb);
+		} else {
+			dev_kfree_skb(skb);
+		}
+	} else {
+		spin_lock_irqsave(&usb->tx.lock, flags);
+		r = usb_write_req_async(&mac->chip.usb, skb->data, skb->len,
+					USB_REQ_DATA_TX, tx_urb_complete, skb);
+		spin_unlock_irqrestore(&usb->tx.lock, flags);
+		if (r)
+			goto fail;
+	}
+	return;
+
+fail:
+	dev_kfree_skb(skb);
+}
+
+/**
+ * filter_ack - filters incoming packets for acknowledgements
+ * @dev: the mac80211 device
+ * @rx_hdr: received header
+ * @stats: the status for the received packet
+ *
+ * This functions looks for ACK packets and tries to match them with the
+ * frames in the tx queue. If a match is found the frame will be dequeued and
+ * the upper layers is informed about the successful transmission. If
+ * mac80211 queues have been stopped and the number of frames still to be
+ * transmitted is low the queues will be opened again.
+ *
+ * Returns 1 if the frame was an ACK, 0 if it was ignored.
+ */
+static int filter_ack(struct ieee80211_hw *hw, struct ieee80211_hdr *rx_hdr,
+		      struct ieee80211_rx_status *stats)
+{
+	struct purelifi_mac *mac = purelifi_hw_mac(hw);
+	struct sk_buff *skb;
+	struct sk_buff_head *q;
+	unsigned long flags;
+	bool found = 0;
+	int i, position = 0;
+
+	if (!ieee80211_is_ack(rx_hdr->frame_control))
+		return 0;
+
+	dev_info(purelifi_mac_dev(mac), "ACK Received\n");
+
+	/* code based on zy driver, this logic may need fix */
+	q = &mac->ack_wait_queue;
+	spin_lock_irqsave(&q->lock, flags);
+
+	skb_queue_walk(q, skb) {
+		struct ieee80211_hdr *tx_hdr;
+
+		position++;
+
+		if (mac->ack_pending && skb_queue_is_first(q, skb))
+			continue;
+		else if (mac->ack_pending == 0)
+			break;
+
+		tx_hdr = (struct ieee80211_hdr *)skb->data;
+		if (likely(ether_addr_equal(tx_hdr->addr2, rx_hdr->addr1))) {
+			found = 1;
+			break;
+		}
+	}
+
+	if (found) {
+		for (i = 1; i < position; i++)
+			skb = __skb_dequeue(q);
+		if (i == position) {
+			purelifi_mac_tx_status(hw, skb,
+					       mac->ack_pending ?
+					       mac->ack_signal : 0,
+					       NULL);
+			mac->ack_pending = 0;
+		}
+
+		mac->ack_pending = skb_queue_len(q) ? 1 : 0;
+		mac->ack_signal = stats->signal;
+	}
+
+	spin_unlock_irqrestore(&q->lock, flags);
+	return 1;
+}
+
+int purelifi_mac_rx(struct ieee80211_hw *hw, const u8 *buffer,
+		    unsigned int length)
+{
+	struct purelifi_mac *mac = purelifi_hw_mac(hw);
+	struct ieee80211_rx_status stats;
+	const struct rx_status *status;
+	struct sk_buff *skb;
+	int bad_frame = 0;
+	__le16 fc;
+	int need_padding;
+	unsigned int payload_length;
+	static unsigned short int min_exp_seq_nmb;
+	u32 crc_error_cnt_low, crc_error_cnt_high;
+	int sidx;
+	struct purelifi_usb_tx *tx;
+
+	/* Packet blockade during disabled interface. */
+	if (!mac->vif)
+		return 0;
+
+	memset(&stats, 0, sizeof(stats));
+	status = (struct rx_status *)buffer;
+
+	stats.flag     = 0;
+	stats.freq     = 2412;
+	stats.band     = NL80211_BAND_2GHZ;
+	mac->rssi      = -15 * ntohs(status->rssi) / 10;
+
+	stats.signal   = mac->rssi;
+
+	if (status->rate_idx > 7)
+		stats.rate_idx = 0;
+	else
+		stats.rate_idx = status->rate_idx;
+
+	crc_error_cnt_low = status->crc_error_count;
+	crc_error_cnt_high = status->crc_error_count >> 32;
+	mac->crc_errors = ((u64)ntohl(crc_error_cnt_low) << 32) |
+		ntohl(crc_error_cnt_high);
+
+	if (!bad_frame &&
+	    filter_ack(hw, (struct ieee80211_hdr *)buffer, &stats) &&
+	    !mac->pass_ctrl)
+		return 0;
+
+	buffer += sizeof(struct rx_status);
+	payload_length = TO_HOST(*(u32 *)buffer);
+
+	/* MTU = 1500, MAC header = 36, CRC = 4, sum = 1540 */
+	if (payload_length > 1560) {
+		dev_err(purelifi_mac_dev(mac), " > MTU %u\n", payload_length);
+		return 0;
+	}
+	buffer += sizeof(u32);
+
+	fc = get_unaligned((__le16 *)buffer);
+	need_padding = ieee80211_is_data_qos(fc) ^ ieee80211_has_a4(fc);
+
+	tx = &mac->chip.usb.tx;
+
+	for (sidx = 0; sidx < MAX_STA_NUM - 1; sidx++) {
+		if (memcmp(&buffer[10], tx->station[sidx].mac, ETH_ALEN))
+			continue;
+		if (tx->station[sidx].flag & STATION_CONNECTED_FLAG) {
+			tx->station[sidx].flag |= STATION_HEARTBEAT_FLAG;
+			break;
+		}
+	}
+
+	if (sidx == MAX_STA_NUM - 1) {
+		for (sidx = 0; sidx < MAX_STA_NUM - 1; sidx++) {
+			if (tx->station[sidx].flag & STATION_CONNECTED_FLAG)
+				continue;
+			memcpy(tx->station[sidx].mac, &buffer[10], ETH_ALEN);
+			tx->station[sidx].flag |= STATION_CONNECTED_FLAG;
+			tx->station[sidx].flag |= STATION_HEARTBEAT_FLAG;
+			break;
+		}
+	}
+
+	if (buffer[0] == IEEE80211_STYPE_PROBE_REQ)
+		dev_info(purelifi_mac_dev(mac), "Probe request\n");
+	else if (buffer[0] == IEEE80211_STYPE_ASSOC_REQ)
+		dev_info(purelifi_mac_dev(mac), "Association request\n");
+
+	if (buffer[0] == IEEE80211_STYPE_AUTH) {
+		dev_info(purelifi_mac_dev(mac), "Authentication req\n");
+		min_exp_seq_nmb = 0;
+	} else if (buffer[0] == IEEE80211_FTYPE_DATA) {
+		unsigned short int seq_nmb = (buffer[23] << 4) |
+			((buffer[22] & 0xF0) >> 4);
+
+		if (seq_nmb < min_exp_seq_nmb &&
+		    ((min_exp_seq_nmb - seq_nmb) < 3000)) {
+			dev_info(purelifi_mac_dev(mac), "seq_nmb < min_exp\n");
+		} else {
+			min_exp_seq_nmb = (seq_nmb + 1) % 4096;
+		}
+	}
+
+	skb = dev_alloc_skb(payload_length + (need_padding ? 2 : 0));
+	if (!skb)
+		return -ENOMEM;
+	if (need_padding) {
+		/* Make sure that the payload data is 4 byte aligned. */
+		skb_reserve(skb, 2);
+	}
+
+	memcpy(skb_put(skb, payload_length), buffer, payload_length);
+	memcpy(IEEE80211_SKB_RXCB(skb), &stats, sizeof(stats));
+	ieee80211_rx_irqsafe(hw, skb);
+	return 0;
+}
+
+static int purelifi_op_add_interface(struct ieee80211_hw *hw,
+				     struct ieee80211_vif *vif)
+{
+	struct purelifi_mac *mac = purelifi_hw_mac(hw);
+	static const char * const iftype80211[] = {
+		[NL80211_IFTYPE_STATION]	= "Station",
+		[NL80211_IFTYPE_ADHOC]		= "Adhoc"
+	};
+
+	if (mac->type != NL80211_IFTYPE_UNSPECIFIED)
+		return -EOPNOTSUPP;
+
+	if (vif->type == NL80211_IFTYPE_ADHOC ||
+	    vif->type == NL80211_IFTYPE_STATION) {
+		dev_info(purelifi_mac_dev(mac), "%s %s\n", __func__,
+			 iftype80211[vif->type]);
+		mac->type = vif->type;
+		mac->vif = vif;
+	} else {
+		dev_info(purelifi_mac_dev(mac), "unsupported iftype\n");
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
+static void purelifi_op_remove_interface(struct ieee80211_hw *hw,
+					 struct ieee80211_vif *vif)
+{
+	struct purelifi_mac *mac = purelifi_hw_mac(hw);
+
+	mac->type = NL80211_IFTYPE_UNSPECIFIED;
+	mac->vif = NULL;
+}
+
+static int purelifi_op_config(struct ieee80211_hw *hw, u32 changed)
+{
+	return 0;
+}
+
+#define SUPPORTED_FIF_FLAGS \
+	(FIF_ALLMULTI | FIF_FCSFAIL | FIF_CONTROL | \
+	 FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC)
+static void purelifi_op_configure_filter(struct ieee80211_hw *hw,
+					 unsigned int changed_flags,
+					 unsigned int *new_flags,
+					 u64 multicast)
+{
+	struct purelifi_mc_hash hash = {
+		.low = multicast,
+		.high = multicast >> 32,
+	};
+	struct purelifi_mac *mac = purelifi_hw_mac(hw);
+	unsigned long flags;
+
+	/* Only deal with supported flags */
+	changed_flags &= SUPPORTED_FIF_FLAGS;
+	*new_flags &= SUPPORTED_FIF_FLAGS;
+
+	/* If multicast parameter
+	 * (as returned by purelifi_op_prepare_multicast)
+	 * has changed, no bit in changed_flags is set. To handle this
+	 * situation, we do not return if changed_flags is 0. If we do so,
+	 * we will have some issue with IPv6 which uses multicast for link
+	 * layer address resolution.
+	 */
+	if (*new_flags & (FIF_ALLMULTI))
+		purelifi_mc_add_all(&hash);
+
+	spin_lock_irqsave(&mac->lock, flags);
+	mac->pass_failed_fcs = !!(*new_flags & FIF_FCSFAIL);
+	mac->pass_ctrl = !!(*new_flags & FIF_CONTROL);
+	mac->multicast_hash = hash;
+	spin_unlock_irqrestore(&mac->lock, flags);
+
+	/* no handling required for FIF_OTHER_BSS as we don't currently
+	 * do BSSID filtering
+	 */
+	/* FIXME: in future it would be nice to enable the probe response
+	 * filter (so that the driver doesn't see them) until
+	 * FIF_BCN_PRBRESP_PROMISC is set. however due to atomicity here, we'd
+	 * have to schedule work to enable prbresp reception, which might
+	 * happen too late. For now we'll just listen and forward them all the
+	 * time.
+	 */
+}
+
+static void purelifi_op_bss_info_changed(struct ieee80211_hw *hw,
+					 struct ieee80211_vif *vif,
+					 struct ieee80211_bss_conf *bss_conf,
+					 u32 changes)
+{
+	struct purelifi_mac *mac = purelifi_hw_mac(hw);
+	int associated;
+
+	dev_info(purelifi_mac_dev(mac), "changes: %x\n", changes);
+
+	if (mac->type != NL80211_IFTYPE_ADHOC) { /* for STATION */
+		associated = is_valid_ether_addr(bss_conf->bssid);
+		goto exit_all;
+	}
+	/* for ADHOC */
+	associated = true;
+	if (changes & BSS_CHANGED_BEACON) {
+		struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
+
+		if (beacon) {
+			purelifi_mac_config_beacon(hw, beacon, false);
+			kfree_skb(beacon);
+			/*Returned skb is used only once and
+			 * low-level driver is
+			 * responsible for freeing it.
+			 */
+		}
+	}
+
+	if (changes & BSS_CHANGED_BEACON_ENABLED) {
+		u16 interval = 0;
+		u8 period = 0;
+
+		if (bss_conf->enable_beacon) {
+			period = bss_conf->dtim_period;
+			interval = bss_conf->beacon_int;
+		}
+
+		spin_lock_irq(&mac->lock);
+		mac->beacon.period = period;
+		mac->beacon.interval = interval;
+		mac->beacon.last_update = jiffies;
+		spin_unlock_irq(&mac->lock);
+
+		purelifi_set_beacon_interval(&mac->chip, interval,
+					     period, mac->type);
+	}
+exit_all:
+	spin_lock_irq(&mac->lock);
+	mac->associated = associated;
+	spin_unlock_irq(&mac->lock);
+}
+
+static int purelifi_get_stats(struct ieee80211_hw *hw,
+			      struct ieee80211_low_level_stats *stats)
+{
+	stats->dot11ACKFailureCount = 0;
+	stats->dot11RTSFailureCount = 0;
+	stats->dot11FCSErrorCount = 0;
+	stats->dot11RTSSuccessCount = 0;
+	return 0;
+}
+
+const char et_strings[][ETH_GSTRING_LEN] = {
+	"phy_rssi",
+	"phy_rx_crc_err"
+};
+
+static int purelifi_get_et_sset_count(struct ieee80211_hw *hw,
+				      struct ieee80211_vif *vif, int sset)
+{
+	if (sset == ETH_SS_STATS)
+		return ARRAY_SIZE(et_strings);
+
+	return 0;
+}
+
+static void purelifi_get_et_strings(struct ieee80211_hw *hw,
+				    struct ieee80211_vif *vif,
+				    u32 sset, u8 *data)
+{
+	if (sset == ETH_SS_STATS)
+		memcpy(data, *et_strings, sizeof(et_strings));
+}
+
+static void purelifi_get_et_stats(struct ieee80211_hw *hw,
+				  struct ieee80211_vif *vif,
+				  struct ethtool_stats *stats, u64 *data)
+{
+	struct purelifi_mac *mac = purelifi_hw_mac(hw);
+
+	data[0] = mac->rssi;
+	data[1] = mac->crc_errors;
+}
+
+static int purelifi_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
+{
+	return 0;
+}
+
+static const struct ieee80211_ops purelifi_ops = {
+	.tx                 = purelifi_op_tx,
+	.start              = purelifi_op_start,
+	.stop               = purelifi_op_stop,
+	.add_interface      = purelifi_op_add_interface,
+	.remove_interface   = purelifi_op_remove_interface,
+	.set_rts_threshold  = purelifi_set_rts_threshold,
+	.config             = purelifi_op_config,
+	.configure_filter   = purelifi_op_configure_filter,
+	.bss_info_changed   = purelifi_op_bss_info_changed,
+	.get_stats          = purelifi_get_stats,
+	.get_et_sset_count  = purelifi_get_et_sset_count,
+	.get_et_stats       = purelifi_get_et_stats,
+	.get_et_strings     = purelifi_get_et_strings,
+};
+
+struct ieee80211_hw *purelifi_mac_alloc_hw(struct usb_interface *intf)
+{
+	struct purelifi_mac *mac;
+	struct ieee80211_hw *hw;
+
+	hw = ieee80211_alloc_hw(sizeof(struct purelifi_mac), &purelifi_ops);
+	if (!hw) {
+		dev_dbg(&intf->dev, "out of memory\n");
+		return NULL;
+	}
+	set_wiphy_dev(hw->wiphy, &intf->dev);
+
+	mac = purelifi_hw_mac(hw);
+
+	memset(mac, 0, sizeof(*mac));
+	spin_lock_init(&mac->lock);
+	mac->hw = hw;
+
+	mac->type = NL80211_IFTYPE_UNSPECIFIED;
+
+	memcpy(mac->channels, purelifi_channels, sizeof(purelifi_channels));
+	memcpy(mac->rates, purelifi_rates, sizeof(purelifi_rates));
+	mac->band.n_bitrates = ARRAY_SIZE(purelifi_rates);
+	mac->band.bitrates = mac->rates;
+	mac->band.n_channels = ARRAY_SIZE(purelifi_channels);
+	mac->band.channels = mac->channels;
+
+	hw->wiphy->bands[NL80211_BAND_2GHZ] = &mac->band;
+
+	_ieee80211_hw_set(hw, IEEE80211_HW_RX_INCLUDES_FCS);
+	_ieee80211_hw_set(hw, IEEE80211_HW_SIGNAL_DBM);
+	_ieee80211_hw_set(hw, IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING);
+	_ieee80211_hw_set(hw, IEEE80211_HW_MFP_CAPABLE);
+
+	hw->wiphy->interface_modes =
+		BIT(NL80211_IFTYPE_STATION) |
+		BIT(NL80211_IFTYPE_ADHOC);
+
+	hw->max_signal = 100;
+	hw->queues = 1;
+	hw->extra_tx_headroom = sizeof(struct purelifi_ctrlset) + 4;
+	/* 4 for 32 bit alignment if no tailroom */
+
+	/* Tell mac80211 that we support multi rate retries */
+	hw->max_rates = IEEE80211_TX_MAX_RATES;
+	hw->max_rate_tries = 18;   /* 9 rates * 2 retries/rate */
+
+	skb_queue_head_init(&mac->ack_wait_queue);
+	mac->ack_pending = 0;
+
+	purelifi_chip_init(&mac->chip, hw, intf);
+
+	SET_IEEE80211_DEV(hw, &intf->dev);
+	return hw;
+}
+
+MODULE_LICENSE("GPL");
diff --git a/drivers/net/wireless/purelifi/mac.h b/drivers/net/wireless/purelifi/mac.h
new file mode 100644
index 000000000000..f0ebe4018d7e
--- /dev/null
+++ b/drivers/net/wireless/purelifi/mac.h
@@ -0,0 +1,189 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef _PURELIFI_MAC_H
+#define _PURELIFI_MAC_H
+
+#include <linux/kernel.h>
+#include <net/mac80211.h>
+
+#include "chip.h"
+
+#define PURELIFI_CCK                  0x00
+#define PURELIFI_OFDM                 0x10
+#define PURELIFI_CCK_PREA_SHORT       0x20
+
+#define PURELIFI_OFDM_PLCP_RATE_6M	0xb
+#define PURELIFI_OFDM_PLCP_RATE_9M	0xf
+#define PURELIFI_OFDM_PLCP_RATE_12M	0xa
+#define PURELIFI_OFDM_PLCP_RATE_18M	0xe
+#define PURELIFI_OFDM_PLCP_RATE_24M	0x9
+#define PURELIFI_OFDM_PLCP_RATE_36M	0xd
+#define PURELIFI_OFDM_PLCP_RATE_48M	0x8
+#define PURELIFI_OFDM_PLCP_RATE_54M	0xc
+
+#define PURELIFI_CCK_RATE_1M	(PURELIFI_CCK | 0x00)
+#define PURELIFI_CCK_RATE_2M	(PURELIFI_CCK | 0x01)
+#define PURELIFI_CCK_RATE_5_5M	(PURELIFI_CCK | 0x02)
+#define PURELIFI_CCK_RATE_11M	(PURELIFI_CCK | 0x03)
+#define PURELIFI_OFDM_RATE_6M	(PURELIFI_OFDM | PURELIFI_OFDM_PLCP_RATE_6M)
+#define PURELIFI_OFDM_RATE_9M	(PURELIFI_OFDM | PURELIFI_OFDM_PLCP_RATE_9M)
+#define PURELIFI_OFDM_RATE_12M	(PURELIFI_OFDM | PURELIFI_OFDM_PLCP_RATE_12M)
+#define PURELIFI_OFDM_RATE_18M	(PURELIFI_OFDM | PURELIFI_OFDM_PLCP_RATE_18M)
+#define PURELIFI_OFDM_RATE_24M	(PURELIFI_OFDM | PURELIFI_OFDM_PLCP_RATE_24M)
+#define PURELIFI_OFDM_RATE_36M	(PURELIFI_OFDM | PURELIFI_OFDM_PLCP_RATE_36M)
+#define PURELIFI_OFDM_RATE_48M	(PURELIFI_OFDM | PURELIFI_OFDM_PLCP_RATE_48M)
+#define PURELIFI_OFDM_RATE_54M	(PURELIFI_OFDM | PURELIFI_OFDM_PLCP_RATE_54M)
+
+#define PURELIFI_RX_ERROR		0x80
+#define PURELIFI_RX_CRC32_ERROR		0x10
+
+#define PLF_REGDOMAIN_FCC	0x10
+#define PLF_REGDOMAIN_IC	0x20
+#define PLF_REGDOMAIN_ETSI	0x30
+#define PLF_REGDOMAIN_SPAIN	0x31
+#define PLF_REGDOMAIN_FRANCE	0x32
+#define PLF_REGDOMAIN_JAPAN_2	0x40
+#define PLF_REGDOMAIN_JAPAN	0x41
+#define PLF_REGDOMAIN_JAPAN_3	0x49
+
+enum {
+	MODULATION_RATE_BPSK_1_2 = 0,
+	MODULATION_RATE_BPSK_3_4,
+	MODULATION_RATE_QPSK_1_2,
+	MODULATION_RATE_QPSK_3_4,
+	MODULATION_RATE_QAM16_1_2,
+	MODULATION_RATE_QAM16_3_4,
+	MODULATION_RATE_QAM64_1_2,
+	MODULATION_RATE_QAM64_3_4,
+	MODULATION_RATE_AUTO,
+	MODULATION_RATE_NUM
+};
+
+#define purelifi_mac_dev(mac) (purelifi_chip_dev(&(mac)->chip))
+
+#define PURELIFI_MAC_STATS_BUFFER_SIZE 16
+#define PURELIFI_MAC_MAX_ACK_WAITERS 50
+
+struct purelifi_ctrlset {
+	enum usb_req_enum_t id;
+	u32            len;
+	u8             modulation;
+	u8             control;
+	u8             service;
+	u8             pad;
+	__le16         packet_length;
+	__le16         current_length;
+	__le16          next_frame_length;
+	__le16         tx_length;
+	u32            payload_len_nw;
+} __packed;
+
+struct tx_status {
+	u8 type;
+	u8 id;
+	u8 rate;
+	u8 pad;
+	u8 mac[ETH_ALEN];
+	u8 retry;
+	u8 failure;
+} __packed;
+
+enum mac_flags {
+	MAC_FIXED_CHANNEL = 0x01,
+};
+
+struct beacon {
+	struct delayed_work watchdog_work;
+	struct sk_buff *cur_beacon;
+	unsigned long last_update;
+	u16 interval;
+	u8 period;
+};
+
+enum purelifi_device_flags {
+	PURELIFI_DEVICE_RUNNING,
+};
+
+struct purelifi_mac {
+	struct purelifi_chip chip;
+	spinlock_t lock; /* lock for mac data */
+	spinlock_t intr_lock; /* not used : interrupt lock for mac */
+	struct ieee80211_hw *hw;
+	struct ieee80211_vif *vif;
+	struct beacon beacon;
+	struct work_struct set_rts_cts_work;
+	struct work_struct process_intr;
+	struct purelifi_mc_hash multicast_hash;
+	u8 intr_buffer[USB_MAX_EP_INT_BUFFER];
+	u8 regdomain;
+	u8 default_regdomain;
+	u8 channel;
+	int type;
+	int associated;
+	unsigned long flags;
+	struct sk_buff_head ack_wait_queue;
+	struct ieee80211_channel channels[14];
+	struct ieee80211_rate rates[12];
+	struct ieee80211_supported_band band;
+
+	/* whether to pass frames with CRC errors to stack */
+	unsigned int pass_failed_fcs:1;
+
+	/* whether to pass control frames to stack */
+	unsigned int pass_ctrl:1;
+
+	/* whether we have received a 802.11 ACK that is pending */
+	bool ack_pending:1;
+
+	/* signal strength of the last 802.11 ACK received */
+	int ack_signal;
+
+	unsigned char hw_address[ETH_ALEN];
+	char serial_number[256];
+	u64 crc_errors;
+	u64 rssi;
+};
+
+static inline struct purelifi_mac *purelifi_hw_mac(struct ieee80211_hw *hw)
+{
+	return hw->priv;
+}
+
+static inline struct purelifi_mac *purelifi_chip_to_mac(struct purelifi_chip
+		*chip)
+{
+	return container_of(chip, struct purelifi_mac, chip);
+}
+
+static inline struct purelifi_mac *purelifi_usb_to_mac(struct purelifi_usb *usb)
+{
+	return purelifi_chip_to_mac(purelifi_usb_to_chip(usb));
+}
+
+static inline u8 *purelifi_mac_get_perm_addr(struct purelifi_mac *mac)
+{
+	return mac->hw->wiphy->perm_addr;
+}
+
+struct ieee80211_hw *purelifi_mac_alloc_hw(struct usb_interface *intf);
+void purelifi_mac_release(struct purelifi_mac *mac);
+
+int purelifi_mac_preinit_hw(struct ieee80211_hw *hw, unsigned char *hw_address);
+int purelifi_mac_init_hw(struct ieee80211_hw *hw);
+
+int purelifi_mac_rx(struct ieee80211_hw *hw, const u8 *buffer,
+		    unsigned int length);
+void purelifi_mac_tx_failed(struct urb *urb);
+void purelifi_mac_tx_to_dev(struct sk_buff *skb, int error);
+int purelifi_op_start(struct ieee80211_hw *hw);
+void purelifi_op_stop(struct ieee80211_hw *hw);
+int purelifi_restore_settings(struct purelifi_mac *mac);
+void block_queue(struct purelifi_usb *usb, const u8 *mac, bool block);
+
+#ifdef DEBUG
+void purelifi_dump_rx_status(const struct rx_status *status);
+#else
+#define purelifi_dump_rx_status(status)
+#endif
+
+#endif
diff --git a/drivers/net/wireless/purelifi/usb.c b/drivers/net/wireless/purelifi/usb.c
new file mode 100644
index 000000000000..1e47b67533a1
--- /dev/null
+++ b/drivers/net/wireless/purelifi/usb.c
@@ -0,0 +1,1075 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/skbuff.h>
+#include <linux/usb.h>
+#include <linux/workqueue.h>
+#include <linux/proc_fs.h>
+#include <linux/fs.h>
+#include <linux/string.h>
+#include <linux/module.h>
+#include <net/mac80211.h>
+#include <asm/unaligned.h>
+#include <linux/version.h>
+#include <linux/sysfs.h>
+
+#include "mac.h"
+#include "usb.h"
+
+#define FCS_LEN 4
+
+#define PROC_FOLDER           "purelifi"
+#define MODULATION_FILENAME   "modulation"
+
+#undef  LOAD_MAC_AND_SERIAL_FROM_FILE
+#undef  LOAD_MAC_AND_SERIAL_FROM_FLASH
+#define LOAD_MAC_AND_SERIAL_FROM_EP0
+
+struct proc_dir_entry *proc_folder;
+struct proc_dir_entry *modulation_proc_entry;
+static atomic_t data_queue_flag;
+
+/*Tx retry backoff timer (in milliseconds).*/
+# define TX_RETRY_BACKOFF_MS 10
+# define STA_QUEUE_CLEANUP_MS 5000
+
+/*Tx retry backoff timer (in jiffies).*/
+# define TX_RETRY_BACKOFF_JIFF ((TX_RETRY_BACKOFF_MS * HZ) / 1000)
+# define STA_QUEUE_CLEANUP_JIFF ((STA_QUEUE_CLEANUP_MS * HZ) / 1000)
+
+static struct usb_device_id usb_ids[] = {
+	{ USB_DEVICE(PURELIFI_X_VENDOR_ID_0, PURELIFI_X_PRODUCT_ID_0),
+	  .driver_info = DEVICE_LIFI_X },
+	{ USB_DEVICE(PURELIFI_XC_VENDOR_ID_0, PURELIFI_XC_PRODUCT_ID_0),
+	  .driver_info = DEVICE_LIFI_XC },
+	{ USB_DEVICE(PURELIFI_XL_VENDOR_ID_0, PURELIFI_XL_PRODUCT_ID_0),
+	  .driver_info = DEVICE_LIFI_XL },
+	{}
+};
+
+const struct device_attribute purelifi_attr_frequency = {
+	  .attr = {.name = "frequency", .mode = (0666)},
+	  .show = purelifi_show_sysfs,
+	  .store = purelifi_store_frequency,
+};
+
+struct device_attribute purelifi_attr_modulation = {
+	.attr = {.name = "modulation", .mode = (0666)},
+	.show = purelifi_show_modulation,
+	.store = purelifi_store_modulation,
+};
+
+const struct proc_ops  modulation_fops = {
+	.proc_open  = modulation_open,
+	.proc_read  = modulation_read,
+	.proc_write = modulation_write
+};
+
+struct usb_interface *ez_usb_interface;
+
+static inline u16 get_bcd_device(const struct usb_device *udev)
+{
+	return le16_to_cpu(udev->descriptor.bcdDevice);
+}
+
+/* Ensures that MAX_TRANSFER_SIZE is even. */
+#define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1)
+
+#define urb_dev(urb) (&(urb)->dev->dev)
+
+void purelifi_send_packet_from_data_queue(struct purelifi_usb *usb)
+{
+	struct sk_buff *skb = NULL;
+	unsigned long flags;
+	static u8 sidx;
+	u8 last_served_sidx;
+	struct purelifi_usb_tx *tx = &usb->tx;
+
+	spin_lock_irqsave(&tx->lock, flags);
+	last_served_sidx = sidx;
+	do {
+		sidx = (sidx + 1) % MAX_STA_NUM;
+		if (!tx->station[sidx].flag & STATION_CONNECTED_FLAG)
+			continue;
+		if (!(tx->station[sidx].flag & STATION_FIFO_FULL_FLAG))
+			skb = skb_peek(&tx->station[sidx].data_list);
+	} while ((sidx != last_served_sidx) && (!skb));
+
+	if (skb) {
+		skb = skb_dequeue(&tx->station[sidx].data_list);
+		usb_write_req_async(usb, skb->data, skb->len, USB_REQ_DATA_TX,
+				    tx_urb_complete, skb);
+		if (skb_queue_len(&tx->station[sidx].data_list) <= 60)
+			block_queue(usb, tx->station[sidx].mac, false);
+	}
+	spin_unlock_irqrestore(&tx->lock, flags);
+}
+
+static void handle_rx_packet(struct purelifi_usb *usb, const u8 *buffer,
+			     unsigned int length)
+{
+	purelifi_mac_rx(purelifi_usb_to_hw(usb), buffer, length);
+}
+
+#define STATION_FIFO_ALMOST_FULL_MESSAGE     0
+#define STATION_FIFO_ALMOST_FULL_NOT_MESSAGE 1
+#define STATION_CONNECT_MESSAGE              2
+#define STATION_DISCONNECT_MESSAGE           3
+
+int rx_usb_enabled;
+static void rx_urb_complete(struct urb *urb)
+{
+	int r;
+	struct purelifi_usb *usb;
+	struct purelifi_usb_tx *tx;
+	const u8 *buffer;
+	static u8 fpga_link_connection_f;
+	unsigned int length;
+	u16 status;
+	u8 sidx;
+
+	if (!urb) {
+		dev_err(purelifi_usb_dev(usb), "urb is NULL.\n");
+		return;
+	} else if (!urb->context) {
+		dev_err(purelifi_usb_dev(usb), "urb ctx is NULL.\n");
+		return;
+	}
+	usb = urb->context;
+
+	if (usb->initialized != 1)
+		return;
+
+	switch (urb->status) {
+	case 0:
+		break;
+	case -ESHUTDOWN:
+	case -EINVAL:
+	case -ENODEV:
+	case -ENOENT:
+	case -ECONNRESET:
+	case -EPIPE:
+		dev_dbg(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
+		return;
+	default:
+		dev_dbg(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
+		goto resubmit;
+	}
+
+	buffer = urb->transfer_buffer;
+	length = (*(u32 *)(buffer + sizeof(struct rx_status))) + sizeof(u32);
+
+	tx = &usb->tx;
+
+	if (urb->actual_length != 8) {
+		if (usb->initialized && fpga_link_connection_f)
+			handle_rx_packet(usb, buffer, length);
+		goto resubmit;
+	}
+
+	status = buffer[7];
+
+	dev_info(&usb->intf->dev, "Recv status=%u\n", status);
+	dev_info(&usb->intf->dev, "Tx packet MAC=%x:%x:%x:%x:%x:%x\n",
+		 buffer[0], buffer[1], buffer[2], buffer[3],
+		 buffer[4], buffer[5]);
+
+	switch (status) {
+	case STATION_FIFO_ALMOST_FULL_NOT_MESSAGE:
+		dev_info(&usb->intf->dev,
+			 "FIFO full not packet receipt\n");
+		tx->mac_fifo_full = 1;
+		for (sidx = 0; sidx < MAX_STA_NUM; sidx++)
+			tx->station[sidx].flag |= STATION_FIFO_FULL_FLAG;
+		break;
+	case STATION_FIFO_ALMOST_FULL_MESSAGE:
+		dev_info(&usb->intf->dev, "FIFO full packet receipt\n");
+
+		for (sidx = 0; sidx < MAX_STA_NUM; sidx++)
+			tx->station[sidx].flag &= 0xFD;
+
+		purelifi_send_packet_from_data_queue(usb);
+		break;
+	case STATION_CONNECT_MESSAGE:
+		fpga_link_connection_f = 1;
+		dev_info(&usb->intf->dev, "ST_CONNECT_MSG packet receipt\n");
+		break;
+	case STATION_DISCONNECT_MESSAGE:
+		fpga_link_connection_f = 0;
+		dev_info(&usb->intf->dev, "ST_DISCONN_MSG packet receipt\n");
+		break;
+	default:
+		dev_info(&usb->intf->dev, "Unknown packet receipt\n");
+		break;
+	}
+
+resubmit:
+	r = usb_submit_urb(urb, GFP_ATOMIC);
+	if (r)
+		dev_dbg(urb_dev(urb), "urb %p resubmit failed (%d)\n", urb, r);
+}
+
+static struct urb *alloc_rx_urb(struct purelifi_usb *usb)
+{
+	struct usb_device *udev = purelifi_usb_to_usbdev(usb);
+	struct urb *urb;
+	void *buffer;
+
+	urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!urb)
+		return NULL;
+
+	buffer = usb_alloc_coherent(udev, USB_MAX_RX_SIZE, GFP_KERNEL,
+				    &urb->transfer_dma);
+	if (!buffer) {
+		usb_free_urb(urb);
+		return NULL;
+	}
+
+	usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, EP_DATA_IN),
+			  buffer, USB_MAX_RX_SIZE,
+			  rx_urb_complete, usb);
+	urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+	return urb;
+}
+
+static void free_rx_urb(struct urb *urb)
+{
+	if (!urb)
+		return;
+	usb_free_coherent(urb->dev, urb->transfer_buffer_length,
+			  urb->transfer_buffer, urb->transfer_dma);
+	usb_free_urb(urb);
+}
+
+static int __lf_x_usb_enable_rx(struct purelifi_usb *usb)
+{
+	int i, r;
+	struct purelifi_usb_rx *rx = &usb->rx;
+	struct urb **urbs;
+
+	r = -ENOMEM;
+	urbs = kcalloc(RX_URBS_COUNT, sizeof(struct urb *), GFP_KERNEL);
+	if (!urbs)
+		goto error;
+
+	for (i = 0; i < RX_URBS_COUNT; i++) {
+		urbs[i] = alloc_rx_urb(usb);
+		if (!urbs[i])
+			goto error;
+	}
+
+	spin_lock_irq(&rx->lock);
+
+	dev_dbg(purelifi_usb_dev(usb), "irq_disabled %d\n", irqs_disabled());
+
+	if (rx->urbs) {
+		spin_unlock_irq(&rx->lock);
+		r = 0;
+		goto error;
+	}
+	rx->urbs = urbs;
+	rx->urbs_count = RX_URBS_COUNT;
+	spin_unlock_irq(&rx->lock);
+
+	for (i = 0; i < RX_URBS_COUNT; i++) {
+		r = usb_submit_urb(urbs[i], GFP_KERNEL);
+		if (r)
+			goto error_submit;
+	}
+
+	return 0; /*no error return*/
+
+error_submit:
+	for (i = 0; i < RX_URBS_COUNT; i++)
+		usb_kill_urb(urbs[i]);
+	spin_lock_irq(&rx->lock);
+	rx->urbs = NULL;
+	rx->urbs_count = 0;
+	spin_unlock_irq(&rx->lock);
+error:
+	if (urbs) {
+		for (i = 0; i < RX_URBS_COUNT; i++)
+			free_rx_urb(urbs[i]);
+	}
+	return r;
+}
+
+int purelifi_usb_enable_rx(struct purelifi_usb *usb)
+{
+	int r;
+	struct purelifi_usb_rx *rx = &usb->rx;
+
+	mutex_lock(&rx->setup_mutex);
+	r = __lf_x_usb_enable_rx(usb);
+	if (!r)
+		rx_usb_enabled = 1;
+
+	mutex_unlock(&rx->setup_mutex);
+
+	return r;
+}
+
+static void __lf_x_usb_disable_rx(struct purelifi_usb *usb)
+{
+	int i;
+	unsigned long flags;
+	struct urb **urbs;
+	unsigned int count;
+	struct purelifi_usb_rx *rx = &usb->rx;
+
+	spin_lock_irqsave(&rx->lock, flags);
+	urbs = rx->urbs;
+	count = rx->urbs_count;
+	spin_unlock_irqrestore(&rx->lock, flags);
+
+	if (!urbs)
+		return;
+
+	for (i = 0; i < count; i++) {
+		usb_kill_urb(urbs[i]);
+		free_rx_urb(urbs[i]);
+	}
+	kfree(urbs);
+
+	spin_lock_irqsave(&rx->lock, flags);
+	rx->urbs = NULL;
+	rx->urbs_count = 0;
+	spin_unlock_irqrestore(&rx->lock, flags);
+}
+
+void purelifi_usb_disable_rx(struct purelifi_usb *usb)
+{
+	struct purelifi_usb_rx *rx = &usb->rx;
+
+	mutex_lock(&rx->setup_mutex);
+	__lf_x_usb_disable_rx(usb);
+	rx_usb_enabled = 0;
+	mutex_unlock(&rx->setup_mutex);
+}
+
+/**
+ * purelifi_usb_disable_tx - disable transmission
+ * @usb: the driver USB structure
+ *
+ * Frees all URBs in the free list and marks the transmission as disabled.
+ */
+void purelifi_usb_disable_tx(struct purelifi_usb *usb)
+{
+	struct purelifi_usb_tx *tx = &usb->tx;
+	unsigned long flags;
+
+	atomic_set(&tx->enabled, 0);
+
+	/* kill all submitted tx-urbs */
+	usb_kill_anchored_urbs(&tx->submitted);
+
+	spin_lock_irqsave(&tx->lock, flags);
+	WARN_ON(!skb_queue_empty(&tx->submitted_skbs));
+	WARN_ON(tx->submitted_urbs != 0);
+	tx->submitted_urbs = 0;
+	spin_unlock_irqrestore(&tx->lock, flags);
+
+	/* The stopped state is ignored, relying on ieee80211_wake_queues()
+	 * in a potentionally following purelifi_usb_enable_tx().
+	 */
+}
+
+/**
+ * purelifi_usb_enable_tx - enables transmission
+ * @usb: a &struct purelifi_usb pointer
+ *
+ * This function enables transmission and prepares the &purelifi_usb_tx data
+ * structure.
+ */
+void purelifi_usb_enable_tx(struct purelifi_usb *usb)
+{
+	unsigned long flags;
+	struct purelifi_usb_tx *tx = &usb->tx;
+
+	spin_lock_irqsave(&tx->lock, flags);
+	atomic_set(&tx->enabled, 1);
+	tx->submitted_urbs = 0;
+	ieee80211_wake_queues(purelifi_usb_to_hw(usb));
+	tx->stopped = 0;
+	spin_unlock_irqrestore(&tx->lock, flags);
+}
+
+/**
+ * tx_urb_complete - completes the execution of an URB
+ * @urb: a URB
+ *
+ * This function is called if the URB has been transferred to a device or an
+ * error has happened.
+ */
+void tx_urb_complete(struct urb *urb)
+{
+	struct sk_buff *skb;
+	struct ieee80211_tx_info *info;
+	struct purelifi_usb *usb;
+
+	skb = (struct sk_buff *)urb->context;
+	info = IEEE80211_SKB_CB(skb);
+	/* grab 'usb' pointer before handing off the skb (since
+	 * it might be freed by purelifi_mac_tx_to_dev or mac80211)
+	 */
+	usb = &purelifi_hw_mac(info->rate_driver_data[0])->chip.usb;
+
+	switch (urb->status) {
+	case 0:
+		break;
+	case -ESHUTDOWN:
+	case -EINVAL:
+	case -ENODEV:
+	case -ENOENT:
+	case -ECONNRESET:
+	case -EPIPE:
+		dev_dbg(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
+		break;
+	default:
+		dev_dbg(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
+		return;
+	}
+
+	purelifi_mac_tx_to_dev(skb, urb->status);
+	purelifi_send_packet_from_data_queue(usb);
+	usb_free_urb(urb);
+}
+
+/**
+ * purelifi_usb_tx: initiates transfer of a frame of the device
+ *
+ * @usb: the driver USB structure
+ * @skb: a &struct sk_buff pointer
+ *
+ * This function tranmits a frame to the device. It doesn't wait for
+ * completion. The frame must contain the control set and have all the
+ * control set information available.
+ *
+ * The function returns 0 if the transfer has been successfully initiated.
+ */
+int purelifi_usb_tx(struct purelifi_usb *usb, struct sk_buff *skb)
+{
+	int r;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	struct usb_device *udev = purelifi_usb_to_usbdev(usb);
+	struct urb *urb;
+	struct purelifi_usb_tx *tx = &usb->tx;
+
+	if (!atomic_read(&tx->enabled)) {
+		r = -ENOENT;
+		goto out;
+	}
+
+	urb = usb_alloc_urb(0, GFP_ATOMIC);
+	if (!urb) {
+		r = -ENOMEM;
+		goto out;
+	}
+
+	usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT),
+			  skb->data, skb->len, tx_urb_complete, skb);
+
+	info->rate_driver_data[1] = (void *)jiffies;
+	skb_queue_tail(&tx->submitted_skbs, skb);
+	usb_anchor_urb(urb, &tx->submitted);
+
+	r = usb_submit_urb(urb, GFP_ATOMIC);
+	if (r) {
+		dev_dbg(purelifi_usb_dev(usb), "urb %p submit failed (%d)\n",
+			urb, r);
+		usb_unanchor_urb(urb);
+		skb_unlink(skb, &tx->submitted_skbs);
+		goto error;
+	}
+	return 0;
+error:
+	usb_free_urb(urb);
+out:
+	return r;
+}
+
+static inline void init_usb_rx(struct purelifi_usb *usb)
+{
+	struct purelifi_usb_rx *rx = &usb->rx;
+
+	spin_lock_init(&rx->lock);
+	mutex_init(&rx->setup_mutex);
+
+	if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH)
+		rx->usb_packet_size = 512;
+	else
+		rx->usb_packet_size = 64;
+
+	if (rx->fragment_length != 0)
+		dev_dbg(purelifi_usb_dev(usb), "fragment_length error\n");
+}
+
+static inline void init_usb_tx(struct purelifi_usb *usb)
+{
+	struct purelifi_usb_tx *tx = &usb->tx;
+
+	spin_lock_init(&tx->lock);
+	atomic_set(&tx->enabled, 0);
+	tx->stopped = 0;
+	skb_queue_head_init(&tx->submitted_skbs);
+	init_usb_anchor(&tx->submitted);
+}
+
+void purelifi_usb_init(struct purelifi_usb *usb, struct ieee80211_hw *hw,
+		       struct usb_interface *intf)
+{
+	memset(usb, 0, sizeof(*usb));
+	usb->intf = usb_get_intf(intf);
+	usb_set_intfdata(usb->intf, hw);
+	hw->conf.chandef.width = NL80211_CHAN_WIDTH_20;
+	init_usb_tx(usb);
+	init_usb_rx(usb);
+}
+
+void purelifi_usb_release(struct purelifi_usb *usb)
+{
+	usb_set_intfdata(usb->intf, NULL);
+	usb_put_intf(usb->intf);
+	/* FIXME: usb_interrupt, usb_tx, usb_rx? */
+}
+
+const char *purelifi_speed(enum usb_device_speed speed)
+{
+	switch (speed) {
+	case USB_SPEED_LOW:
+		return "low";
+	case USB_SPEED_FULL:
+		return "full";
+	case USB_SPEED_HIGH:
+		return "high";
+	default:
+		return "unknown";
+	}
+}
+
+int purelifi_usb_init_hw(struct purelifi_usb *usb)
+{
+	int r;
+
+	r = usb_reset_configuration(purelifi_usb_to_usbdev(usb));
+	if (r) {
+		dev_err(purelifi_usb_dev(usb), "cfg reset failed (%d)\n", r);
+		return r;
+	}
+	return 0;
+}
+
+static void get_usb_req(struct usb_device *udev, const u8 *buffer,
+			int buffer_len, enum usb_req_enum_t usb_req_id,
+			struct usb_req_t *usb_req)
+{
+	u8 *buffer_dst_p = usb_req->buf;
+	const u8 *buffer_src_p = buffer;
+	u32 payload_len_nw = TO_NETWORK((buffer_len + FCS_LEN));
+
+	usb_req->id = usb_req_id;
+	usb_req->len  = 0;
+
+	/* Copy buffer length into the transmitted buffer, as it is important
+	 * for the Rx MAC to know its exact length.
+	 */
+	if (usb_req->id == USB_REQ_BEACON_WR) {
+		memcpy(buffer_dst_p, &payload_len_nw, sizeof(payload_len_nw));
+		buffer_dst_p += sizeof(payload_len_nw);
+		usb_req->len += sizeof(payload_len_nw);
+	}
+
+	memcpy(buffer_dst_p, buffer_src_p, buffer_len);
+	buffer_dst_p += buffer_len;
+	buffer_src_p += buffer_len;
+	usb_req->len +=  buffer_len;
+
+	/* Set the FCS_LEN (4) bytes as 0 for CRC checking. */
+	memset(buffer_dst_p, 0, FCS_LEN);
+	buffer_dst_p += FCS_LEN;
+	usb_req->len += FCS_LEN;
+
+	/* Round the packet to be transmitted to 4 bytes. */
+	if (usb_req->len % PURELIFI_BYTE_NUM_ALIGNMENT) {
+		memset(buffer_dst_p, 0, PURELIFI_BYTE_NUM_ALIGNMENT -
+		       (usb_req->len % PURELIFI_BYTE_NUM_ALIGNMENT));
+		buffer_dst_p += PURELIFI_BYTE_NUM_ALIGNMENT -
+			(usb_req->len % PURELIFI_BYTE_NUM_ALIGNMENT);
+		usb_req->len += PURELIFI_BYTE_NUM_ALIGNMENT -
+			(usb_req->len % PURELIFI_BYTE_NUM_ALIGNMENT);
+	}
+
+	usb_req->id = TO_NETWORK(usb_req->id);
+	usb_req->len = TO_NETWORK(usb_req->len);
+}
+
+int usb_write_req_async(struct purelifi_usb *usb, const u8 *buffer,
+			int buffer_len, enum usb_req_enum_t usb_req_id,
+			usb_complete_t complete_fn,
+			void *context)
+{
+	int r;
+	struct usb_device *udev = interface_to_usbdev(ez_usb_interface);
+	struct urb *urb = usb_alloc_urb(0, GFP_ATOMIC);
+
+	usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT),
+			  (void *)buffer, buffer_len, complete_fn, context);
+
+	r = usb_submit_urb(urb, GFP_ATOMIC);
+
+	if (r)
+		dev_err(&udev->dev, "async write submit failed (%d)\n", r);
+
+	return r;
+}
+
+int usb_write_req(const u8 *buffer, int buffer_len,
+		  enum usb_req_enum_t usb_req_id)
+{
+	int r;
+	int actual_length;
+	int usb_bulk_msg_len;
+	unsigned char *dma_buffer = NULL;
+	struct usb_device *udev = interface_to_usbdev(ez_usb_interface);
+	struct usb_req_t usb_req;
+
+	get_usb_req(udev, buffer, buffer_len, usb_req_id, &usb_req);
+	usb_bulk_msg_len = sizeof(usb_req.id) + sizeof(usb_req.len) +
+			   TO_HOST(usb_req.len);
+
+	dma_buffer = kzalloc(usb_bulk_msg_len, GFP_KERNEL);
+
+	if (!dma_buffer) {
+		r = -ENOMEM;
+		goto error;
+	}
+	memcpy(dma_buffer, &usb_req, usb_bulk_msg_len);
+
+	r = usb_bulk_msg(udev,
+			 usb_sndbulkpipe(udev, EP_DATA_OUT),
+			 dma_buffer, usb_bulk_msg_len,
+			 &actual_length, USB_BULK_MSG_TIMEOUT_MS);
+	kfree(dma_buffer);
+error:
+	if (r)
+		dev_err(&udev->dev, "usb_bulk_msg failed (%d)\n", r);
+
+	return r;
+}
+
+static void slif_data_plane_sap_timer_callb(struct timer_list *t)
+{
+	struct purelifi_usb *usb = from_timer(usb, t, tx.tx_retry_timer);
+
+	purelifi_send_packet_from_data_queue(usb);
+	timer_setup(&usb->tx.tx_retry_timer,
+		    slif_data_plane_sap_timer_callb, 0);
+	mod_timer(&usb->tx.tx_retry_timer, jiffies + TX_RETRY_BACKOFF_JIFF);
+}
+
+static void sta_queue_cleanup_timer_callb(struct timer_list *t)
+{
+	struct purelifi_usb *usb = from_timer(usb, t, sta_queue_cleanup);
+	struct purelifi_usb_tx *tx = &usb->tx;
+	int sidx;
+
+	for (sidx = 0; sidx < MAX_STA_NUM - 1; sidx++) {
+		if (!(tx->station[sidx].flag & STATION_CONNECTED_FLAG))
+			continue;
+		if (tx->station[sidx].flag & STATION_HEARTBEAT_FLAG) {
+			tx->station[sidx].flag ^= STATION_HEARTBEAT_FLAG;
+		} else {
+			memset(tx->station[sidx].mac, 0, ETH_ALEN);
+			tx->station[sidx].flag = 0;
+		}
+	}
+	timer_setup(&usb->sta_queue_cleanup,
+		    sta_queue_cleanup_timer_callb, 0);
+	mod_timer(&usb->sta_queue_cleanup, jiffies + STA_QUEUE_CLEANUP_JIFF);
+}
+
+static int probe(struct usb_interface *intf,
+		 const struct usb_device_id *id)
+{
+	int r = 0;
+	struct purelifi_chip *chip;
+	struct purelifi_usb *usb;
+	struct purelifi_usb_tx *tx;
+	struct ieee80211_hw *hw = NULL;
+	static unsigned char hw_address[ETH_ALEN];
+	static unsigned char serial_number[PURELIFI_SERIAL_LEN];
+	unsigned int i;
+
+	ez_usb_interface = intf;
+
+	create_config(intf);
+	hw = purelifi_mac_alloc_hw(intf);
+
+	if (!hw) {
+		r = -ENOMEM;
+		goto error;
+	}
+
+	chip = &purelifi_hw_mac(hw)->chip;
+	usb = &chip->usb;
+	tx = &usb->tx;
+
+	r = upload_mac_and_serial(intf, hw_address, serial_number);
+
+	if (r) {
+		dev_err(&intf->dev, "MAC and Serial upload failed (%d)\n", r);
+		goto error;
+	}
+	chip->unit_type = STA;
+	dev_dbg(&intf->dev, "unit type is station");
+
+	r = purelifi_mac_preinit_hw(hw, hw_address);
+	if (r) {
+		dev_dbg(&intf->dev, "init mac failed (%d)\n", r);
+		goto error;
+	}
+
+	r = ieee80211_register_hw(hw);
+	if (r) {
+		dev_dbg(&intf->dev, "register device failed (%d)\n", r);
+		goto error;
+	}
+	dev_info(&intf->dev, "%s\n", wiphy_name(hw->wiphy));
+
+	if ((le16_to_cpu(interface_to_usbdev(intf)->descriptor.idVendor) ==
+				PURELIFI_XL_VENDOR_ID_0) &&
+	    (le16_to_cpu(interface_to_usbdev(intf)->descriptor.idProduct) ==
+				PURELIFI_XL_PRODUCT_ID_0)) {
+		r = download_xl_firmware(intf);
+	} else {
+		r = download_fpga(intf);
+	}
+	if (r != 0) {
+		dev_err(&intf->dev, "FPGA download failed (%d)\n", r);
+		goto error;
+	}
+
+	tx->mac_fifo_full = 0;
+	spin_lock_init(&tx->lock);
+
+	msleep(200);
+	r = purelifi_usb_init_hw(usb);
+	if (r < 0) {
+		dev_info(&intf->dev, "usb_init_hw failed (%d)\n", r);
+		goto error;
+	}
+
+	msleep(200);
+	r = purelifi_chip_switch_radio(chip, 1); /* Switch ON Radio */
+	if (r < 0) {
+		dev_info(&intf->dev, "chip_switch_radio_on failed (%d)\n", r);
+		goto error;
+	}
+
+	msleep(200);
+	r = purelifi_chip_set_rate(chip, 8);
+	if (r < 0) {
+		dev_info(&intf->dev, "chip_set_rate failed (%d)\n", r);
+		goto error;
+	}
+
+	msleep(200);
+	r = usb_write_req(hw_address, ETH_ALEN, USB_REQ_MAC_WR);
+	if (r < 0) {
+		dev_info(&intf->dev, "MAC_WR failure (%d)\n", r);
+		goto error;
+	}
+
+	purelifi_chip_enable_rxtx(chip);
+
+	/* Initialise the data plane Tx queue */
+	atomic_set(&data_queue_flag, 1);
+	for (i = 0; i < MAX_STA_NUM; i++) {
+		skb_queue_head_init(&tx->station[i].data_list);
+		tx->station[i].flag = 0;
+	}
+	tx->station[STA_BROADCAST_INDEX].flag |= STATION_CONNECTED_FLAG;
+	for (i = 0; i < ETH_ALEN; i++)
+		tx->station[STA_BROADCAST_INDEX].mac[i] = 0xFF;
+	atomic_set(&data_queue_flag, 0);
+
+	timer_setup(&tx->tx_retry_timer, slif_data_plane_sap_timer_callb, 0);
+	tx->tx_retry_timer.expires = jiffies + TX_RETRY_BACKOFF_JIFF;
+	add_timer(&tx->tx_retry_timer);
+
+	timer_setup(&usb->sta_queue_cleanup,
+		    sta_queue_cleanup_timer_callb, 0);
+	usb->sta_queue_cleanup.expires = jiffies + STA_QUEUE_CLEANUP_JIFF;
+	add_timer(&usb->sta_queue_cleanup);
+
+	usb->initialized = 1;
+	return 0;
+error:
+	if (hw) {
+		purelifi_mac_release(purelifi_hw_mac(hw));
+		ieee80211_unregister_hw(hw);
+		ieee80211_free_hw(hw);
+	}
+	return r;
+}
+
+static void disconnect(struct usb_interface *intf)
+{
+	struct ieee80211_hw *hw = purelifi_intf_to_hw(intf);
+	struct purelifi_mac *mac;
+	struct purelifi_usb *usb;
+
+	/* Either something really bad happened, or
+	 * we're just dealing with
+	 * a DEVICE_INSTALLER.
+	 */
+	if (!hw)
+		return;
+
+	mac = purelifi_hw_mac(hw);
+	usb = &mac->chip.usb;
+
+	del_timer_sync(&usb->tx.tx_retry_timer);
+	del_timer_sync(&usb->sta_queue_cleanup);
+
+	ieee80211_unregister_hw(hw);
+
+	purelifi_usb_disable_tx(usb);
+	purelifi_usb_disable_rx(usb);
+
+	/* If the disconnect has been caused by a removal of the
+	 * driver module, the reset allows reloading of the driver. If the
+	 * reset will not be executed here,
+	 * the upload of the firmware in the
+	 * probe function caused by the reloading of the driver will fail.
+	 */
+	usb_reset_device(interface_to_usbdev(intf));
+
+	device_remove_file(&intf->dev, &purelifi_attr_modulation);
+	device_remove_file(&intf->dev, &purelifi_attr_frequency);
+
+	purelifi_mac_release(mac);
+	ieee80211_free_hw(hw);
+}
+
+static void purelifi_usb_resume(struct purelifi_usb *usb)
+{
+	struct purelifi_mac *mac = purelifi_usb_to_mac(usb);
+	int r;
+
+	r = purelifi_op_start(purelifi_usb_to_hw(usb));
+	if (r < 0) {
+		dev_warn(purelifi_usb_dev(usb),
+			 "Device resume failed (%d)\n", r);
+
+		if (usb->was_running)
+			set_bit(PURELIFI_DEVICE_RUNNING, &mac->flags);
+
+		usb_queue_reset_device(usb->intf);
+		return;
+	}
+
+	if (mac->type != NL80211_IFTYPE_UNSPECIFIED) {
+		r = purelifi_restore_settings(mac);
+		if (r < 0) {
+			dev_dbg(purelifi_usb_dev(usb),
+				"restore failed (%d)\n", r);
+			return;
+		}
+	}
+}
+
+static void purelifi_usb_stop(struct purelifi_usb *usb)
+{
+	purelifi_op_stop(purelifi_usb_to_hw(usb));
+	purelifi_usb_disable_tx(usb);
+	purelifi_usb_disable_rx(usb);
+
+	usb->initialized = 0;
+}
+
+static int pre_reset(struct usb_interface *intf)
+{
+	struct ieee80211_hw *hw = usb_get_intfdata(intf);
+	struct purelifi_mac *mac;
+	struct purelifi_usb *usb;
+
+	if (!hw || intf->condition != USB_INTERFACE_BOUND)
+		return 0;
+
+	mac = purelifi_hw_mac(hw);
+	usb = &mac->chip.usb;
+
+	usb->was_running = test_bit(PURELIFI_DEVICE_RUNNING, &mac->flags);
+
+	purelifi_usb_stop(usb);
+
+	mutex_lock(&mac->chip.mutex);
+	return 0;
+}
+
+static int post_reset(struct usb_interface *intf)
+{
+	struct ieee80211_hw *hw = usb_get_intfdata(intf);
+	struct purelifi_mac *mac;
+	struct purelifi_usb *usb;
+
+	if (!hw || intf->condition != USB_INTERFACE_BOUND)
+		return 0;
+
+	mac = purelifi_hw_mac(hw);
+	usb = &mac->chip.usb;
+
+	mutex_unlock(&mac->chip.mutex);
+
+	if (usb->was_running)
+		purelifi_usb_resume(usb);
+	return 0;
+}
+
+static struct purelifi_usb *get_purelifi_usb(struct usb_interface *intf)
+{
+	struct ieee80211_hw *hw = purelifi_intf_to_hw(intf);
+	struct purelifi_mac *mac;
+
+	/* Either something really bad happened, or
+	 * we're just dealing with
+	 * a DEVICE_INSTALLER.
+	 */
+	if (!hw)
+		return NULL;
+
+	mac = purelifi_hw_mac(hw);
+	return &mac->chip.usb;
+}
+
+#ifdef CONFIG_PM
+
+static int suspend(struct usb_interface *interface,
+		   pm_message_t message)
+{
+	struct purelifi_usb *pl = get_purelifi_usb(interface);
+	struct purelifi_mac *mac = purelifi_usb_to_mac(pl);
+
+	if (!pl || !purelifi_usb_dev(pl))
+		return -ENODEV;
+	if (pl->initialized == 0)
+		return 0;
+	pl->was_running = test_bit(PURELIFI_DEVICE_RUNNING, &mac->flags);
+	purelifi_usb_stop(pl);
+	return 0;
+}
+
+static int resume(struct usb_interface *interface)
+{
+	struct purelifi_usb *pl = get_purelifi_usb(interface);
+
+	if (!pl || !purelifi_usb_dev(pl))
+		return -ENODEV;
+	if (pl->was_running)
+		purelifi_usb_resume(pl);
+	return 0;
+}
+
+#endif
+
+static struct usb_driver driver = {
+	.name        = KBUILD_MODNAME,
+	.id_table    = usb_ids,
+	.probe        = probe,
+	.disconnect    = disconnect,
+	.pre_reset    = pre_reset,
+	.post_reset    = post_reset,
+	.suspend        = suspend,
+	.resume         = resume,
+	.disable_hub_initiated_lpm = 1,
+};
+
+struct workqueue_struct *purelifi_workqueue;
+
+static int create_proc_entry_e(struct proc_dir_entry *entry,
+			       size_t size,
+			       mode_t mode,
+			       const struct proc_ops *pops,
+			       const char *entry_name,
+			       struct proc_dir_entry *parent
+			     )
+{
+	entry = proc_create(entry_name, mode, parent, pops);
+	if (!(entry))
+		return -ENOMEM;
+	return 0;
+}
+
+static int __init usb_init(void)
+{
+	int r;
+
+	proc_folder = proc_mkdir(PROC_FOLDER, NULL);
+	if (!proc_folder) {
+		pr_err("error creating proc folder\n");
+		r = -ENOMEM;
+		goto error;
+	}
+
+	r = create_proc_entry_e(modulation_proc_entry, sizeof(u32), 0666,
+				&modulation_fops, MODULATION_FILENAME,
+				proc_folder);
+	if (r)
+		goto remove_proc_dir;
+
+	purelifi_workqueue = create_singlethread_workqueue(driver.name);
+	if (!purelifi_workqueue) {
+		pr_err("%s couldn't create workqueue\n", driver.name);
+		r = -ENOMEM;
+		goto remove_modulation_proc_file;
+	}
+
+	r = usb_register(&driver);
+	if (r) {
+		destroy_workqueue(purelifi_workqueue);
+		pr_err("%s usb_register() failed %d\n", driver.name, r);
+		return r;
+	}
+
+	pr_debug("Driver initialized :%s\n", driver.name);
+	return 0;
+
+remove_modulation_proc_file:
+	remove_proc_entry(MODULATION_FILENAME, proc_folder);
+remove_proc_dir:
+	remove_proc_entry(PROC_FOLDER, NULL);
+error:
+	return r;
+}
+
+static void __exit usb_exit(void)
+{
+	remove_proc_entry(MODULATION_FILENAME, proc_folder);
+	remove_proc_entry(PROC_FOLDER, NULL);
+	if (ez_usb_interface) {
+		device_remove_file(&ez_usb_interface->dev,
+				   &purelifi_attr_modulation);
+		device_remove_file(&ez_usb_interface->dev,
+				   &purelifi_attr_frequency);
+	}
+	usb_deregister(&driver);
+	destroy_workqueue(purelifi_workqueue);
+	pr_debug("%s %s\n", driver.name, __func__);
+}
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("USB driver for pureLiFi devices");
+MODULE_AUTHOR("pureLiFi Ltd");
+MODULE_VERSION("1.0");
+MODULE_FIRMWARE("purelifi/li_fi_x/LiFi-X.bit");
+MODULE_DEVICE_TABLE(usb, usb_ids);
+
+module_init(usb_init);
+module_exit(usb_exit);
diff --git a/drivers/net/wireless/purelifi/usb.h b/drivers/net/wireless/purelifi/usb.h
new file mode 100644
index 000000000000..ebc5e9dd2207
--- /dev/null
+++ b/drivers/net/wireless/purelifi/usb.h
@@ -0,0 +1,199 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef _PURELIFI_USB_H
+#define _PURELIFI_USB_H
+
+#include <linux/completion.h>
+#include <linux/netdevice.h>
+#include <linux/spinlock.h>
+#include <linux/skbuff.h>
+#include <linux/usb.h>
+
+#include "intf.h"
+
+#define TO_NETWORK(X) ((((X) & 0xFF000000) >> 24) | (((X) & 0xFF0000) >> 8) |\
+		      (((X) & 0xFF00) << 8) | (((X) & 0xFF) << 24))
+
+#define TO_NETWORK_16(X) ((((X) & 0xFF00) >> 8) | (((X) & 0x00FF) << 8))
+
+#define TO_NETWORK_32(X) TO_NETWORK(X)
+
+#define TO_HOST(X)    TO_NETWORK(X)
+#define TO_HOST_16(X) TO_NETWORK_16(X)
+#define TO_HOST_32(X) TO_NETWORK_32(X)
+
+#define USB_BULK_MSG_TIMEOUT_MS 2000
+
+#define PURELIFI_X_VENDOR_ID_0   0x16C1
+#define PURELIFI_X_PRODUCT_ID_0  0x1CDE
+#define PURELIFI_XC_VENDOR_ID_0  0x2EF5
+#define PURELIFI_XC_PRODUCT_ID_0 0x0008
+#define PURELIFI_XL_VENDOR_ID_0  0x2EF5
+#define PURELIFI_XL_PRODUCT_ID_0 0x000A /* Station */
+
+int usb_write_req(const u8 *buffer, int buffer_len,
+		  enum usb_req_enum_t usb_req_id);
+void tx_urb_complete(struct urb *urb);
+
+enum {
+	USB_MAX_RX_SIZE       = 4800,
+	USB_MAX_EP_INT_BUFFER = 64,
+};
+
+/* USB interrupt */
+struct purelifi_usb_interrupt {
+	spinlock_t lock;/* spin lock for usb interrupt buffer */
+	struct urb *urb;
+	void *buffer;
+	int interval;
+};
+
+#define RX_URBS_COUNT 5
+
+struct purelifi_usb_rx {
+	spinlock_t lock;/* spin lock for rx urb */
+	struct mutex setup_mutex; /* mutex lockt for rx urb */
+	u8 fragment[2 * USB_MAX_RX_SIZE];
+	unsigned int fragment_length;
+	unsigned int usb_packet_size;
+	struct urb **urbs;
+	int urbs_count;
+};
+
+struct station_t {
+   //  7...3    |    2      |     1     |     0	    |
+   // Reserved  | Heartbeat | FIFO full | Connected |
+	unsigned char flag;
+	unsigned char mac[ETH_ALEN];
+	struct sk_buff_head data_list;
+};
+
+extern const struct device_attribute purelifi_attr_frequency;
+extern struct device_attribute purelifi_attr_modulation;
+
+#define STATION_CONNECTED_FLAG 0x1
+#define STATION_FIFO_FULL_FLAG 0x2
+#define STATION_HEARTBEAT_FLAG 0x4
+
+#define PURELIFI_SERIAL_LEN 256
+/**
+ * struct purelifi_usb_tx - structure used for transmitting frames
+ * @enabled: atomic enabled flag, indicates whether tx is enabled
+ * @lock: lock for transmission
+ * @submitted: anchor for URBs sent to device
+ * @submitted_urbs: atomic integer that counts the URBs having sent to the
+ *   device, which haven't been completed
+ * @stopped: indicates whether higher level tx queues are stopped
+ */
+#define STA_BROADCAST_INDEX (AP_USER_LIMIT)
+#define MAX_STA_NUM         (AP_USER_LIMIT + 1)
+struct purelifi_usb_tx {
+	atomic_t enabled;
+	spinlock_t lock; /*spinlock for USB tx */
+	u8 mac_fifo_full;
+	struct sk_buff_head submitted_skbs;
+	struct usb_anchor submitted;
+	int submitted_urbs;
+	u8 stopped:1;
+	struct timer_list tx_retry_timer;
+	struct station_t station[MAX_STA_NUM];
+};
+
+/* Contains the usb parts. The structure doesn't require a lock because intf
+ * will not be changed after initialization.
+ */
+struct purelifi_usb {
+	struct timer_list sta_queue_cleanup;
+	struct purelifi_usb_rx rx;
+	struct purelifi_usb_tx tx;
+	struct usb_interface *intf;
+	u8 req_buf[64]; /* purelifi_usb_iowrite16v needs 62 bytes */
+	u8 initialized:1, was_running:1;
+};
+
+enum endpoints {
+	EP_DATA_IN  = 2,
+	EP_DATA_OUT = 8,
+};
+
+enum devicetype {
+	DEVICE_LIFI_X  = 0,
+	DEVICE_LIFI_XC  = 1,
+	DEVICE_LIFI_XL  = 1,
+};
+
+int usb_write_req_async(struct purelifi_usb *usb, const u8 *buffer,
+			int buffer_len, enum usb_req_enum_t usb_req_id,
+		usb_complete_t complete_fn, void *context);
+
+#define purelifi_usb_dev(usb) (&(usb)->intf->dev)
+static inline struct usb_device *purelifi_usb_to_usbdev(struct purelifi_usb
+		*usb)
+{
+	return interface_to_usbdev(usb->intf);
+}
+
+static inline struct ieee80211_hw *purelifi_intf_to_hw(struct usb_interface
+		*intf)
+{
+	return usb_get_intfdata(intf);
+}
+
+static inline struct ieee80211_hw *purelifi_usb_to_hw(struct purelifi_usb
+		*usb)
+{
+	return purelifi_intf_to_hw(usb->intf);
+}
+
+void purelifi_usb_init(struct purelifi_usb *usb, struct ieee80211_hw *hw,
+		       struct usb_interface *intf);
+void purelifi_send_packet_from_data_queue(struct purelifi_usb *usb);
+void purelifi_usb_release(struct purelifi_usb *usb);
+void purelifi_usb_disable_rx(struct purelifi_usb *usb);
+void purelifi_usb_enable_tx(struct purelifi_usb *usb);
+void purelifi_usb_disable_tx(struct purelifi_usb *usb);
+int purelifi_usb_tx(struct purelifi_usb *usb, struct sk_buff *skb);
+int purelifi_usb_enable_rx(struct purelifi_usb *usb);
+int purelifi_usb_init_hw(struct purelifi_usb *usb);
+const char *purelifi_speed(enum usb_device_speed speed);
+
+/*Firmware declarations */
+int download_xl_firmware(struct usb_interface *intf);
+int download_fpga(struct usb_interface *intf);
+
+int upload_mac_and_serial(struct usb_interface *intf,
+			  unsigned char *hw_address,
+			  unsigned char *serial_number);
+
+void create_config(struct usb_interface *intf);
+
+/* Debugfs declarations */
+
+ssize_t purelifi_store_frequency(struct device *dev,
+				 struct device_attribute *attr,
+				 const char *buf,
+				 size_t len);
+
+ssize_t purelifi_show_sysfs(struct device *dev,
+			    struct device_attribute *attr,
+			    char *buf);
+
+ssize_t purelifi_store_modulation(struct device *dev,
+				  struct device_attribute *attr,
+				  const char *buf,
+				  size_t len);
+
+ssize_t purelifi_show_modulation(struct device *dev,
+				 struct device_attribute *attr,
+				 char *buf);
+
+int modulation_open(struct inode *inode_p, struct file *file_p);
+
+ssize_t modulation_read(struct file *file_p,
+			char __user *user_p,
+			size_t offset, loff_t *off_p);
+
+ssize_t modulation_write(struct file *file_p,
+			 const char __user *buffer,
+			 size_t count, loff_t *actual_data_written);
+#endif
