drivers/net/wireless/ath/ath6kl/usb.c - arm/linux - Git at Google

 /*
  * Copyright (c) 2007-2011 Atheros Communications Inc.
  * Copyright (c) 2011-2012 Qualcomm Atheros, Inc.
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */

 #include <linux/module.h>
 #include <linux/usb.h>

 #include "debug.h"
 #include "core.h"

 /* usb device object */
 struct ath6kl_usb {
 	struct usb_device *udev;
 	struct usb_interface *interface;
 	u8 *diag_cmd_buffer;
 	u8 *diag_resp_buffer;
 	struct ath6kl *ar;
 };

 /* diagnostic command defnitions */
 #define ATH6KL_USB_CONTROL_REQ_SEND_BMI_CMD        1
 #define ATH6KL_USB_CONTROL_REQ_RECV_BMI_RESP       2
 #define ATH6KL_USB_CONTROL_REQ_DIAG_CMD            3
 #define ATH6KL_USB_CONTROL_REQ_DIAG_RESP           4

 #define ATH6KL_USB_CTRL_DIAG_CC_READ               0
 #define ATH6KL_USB_CTRL_DIAG_CC_WRITE              1

 struct ath6kl_usb_ctrl_diag_cmd_write {
 	__le32 cmd;
 	__le32 address;
 	__le32 value;
 	__le32 _pad[1];
 } __packed;

 struct ath6kl_usb_ctrl_diag_cmd_read {
 	__le32 cmd;
 	__le32 address;
 } __packed;

 struct ath6kl_usb_ctrl_diag_resp_read {
 	__le32 value;
 } __packed;

 #define ATH6KL_USB_MAX_DIAG_CMD (sizeof(struct ath6kl_usb_ctrl_diag_cmd_write))
 #define ATH6KL_USB_MAX_DIAG_RESP (sizeof(struct ath6kl_usb_ctrl_diag_resp_read))

 static void ath6kl_usb_destroy(struct ath6kl_usb *ar_usb)
 {
 	usb_set_intfdata(ar_usb->interface, NULL);

 	kfree(ar_usb->diag_cmd_buffer);
 	kfree(ar_usb->diag_resp_buffer);

 	kfree(ar_usb);
 }

 static struct ath6kl_usb *ath6kl_usb_create(struct usb_interface *interface)
 {
 	struct ath6kl_usb *ar_usb = NULL;
 	struct usb_device *dev = interface_to_usbdev(interface);
 	int status = 0;

 	ar_usb = kzalloc(sizeof(struct ath6kl_usb), GFP_KERNEL);
 	if (ar_usb == NULL)
 		goto fail_ath6kl_usb_create;

 	memset(ar_usb, 0, sizeof(struct ath6kl_usb));
 	usb_set_intfdata(interface, ar_usb);
 	ar_usb->udev = dev;
 	ar_usb->interface = interface;

 	ar_usb->diag_cmd_buffer = kzalloc(ATH6KL_USB_MAX_DIAG_CMD, GFP_KERNEL);
 	if (ar_usb->diag_cmd_buffer == NULL) {
 		status = -ENOMEM;
 		goto fail_ath6kl_usb_create;
 	}

 	ar_usb->diag_resp_buffer = kzalloc(ATH6KL_USB_MAX_DIAG_RESP,
 					   GFP_KERNEL);
 	if (ar_usb->diag_resp_buffer == NULL) {
 		status = -ENOMEM;
 		goto fail_ath6kl_usb_create;
 	}

 fail_ath6kl_usb_create:
 	if (status != 0) {
 		ath6kl_usb_destroy(ar_usb);
 		ar_usb = NULL;
 	}
 	return ar_usb;
 }

 static void ath6kl_usb_device_detached(struct usb_interface *interface)
 {
 	struct ath6kl_usb *ar_usb;

 	ar_usb = usb_get_intfdata(interface);
 	if (ar_usb == NULL)
 		return;

 	ath6kl_stop_txrx(ar_usb->ar);

 	ath6kl_core_cleanup(ar_usb->ar);

 	ath6kl_usb_destroy(ar_usb);
 }

 static int ath6kl_usb_submit_ctrl_out(struct ath6kl_usb *ar_usb,
 				   u8 req, u16 value, u16 index, void *data,
 				   u32 size)
 {
 	u8 *buf = NULL;
 	int ret;

 	if (size > 0) {
 		buf = kmalloc(size, GFP_KERNEL);
 		if (buf == NULL)
 			return -ENOMEM;

 		memcpy(buf, data, size);
 	}

 	/* note: if successful returns number of bytes transfered */
 	ret = usb_control_msg(ar_usb->udev,
 			      usb_sndctrlpipe(ar_usb->udev, 0),
 			      req,
 			      USB_DIR_OUT | USB_TYPE_VENDOR |
 			      USB_RECIP_DEVICE, value, index, buf,
 			      size, 1000);

 	if (ret < 0) {
 		ath6kl_dbg(ATH6KL_DBG_USB, "%s failed,result = %d\n",
 			   __func__, ret);
 	}

 	kfree(buf);

 	return 0;
 }

 static int ath6kl_usb_submit_ctrl_in(struct ath6kl_usb *ar_usb,
 				  u8 req, u16 value, u16 index, void *data,
 				  u32 size)
 {
 	u8 *buf = NULL;
 	int ret;

 	if (size > 0) {
 		buf = kmalloc(size, GFP_KERNEL);
 		if (buf == NULL)
 			return -ENOMEM;
 	}

 	/* note: if successful returns number of bytes transfered */
 	ret = usb_control_msg(ar_usb->udev,
 				 usb_rcvctrlpipe(ar_usb->udev, 0),
 				 req,
 				 USB_DIR_IN | USB_TYPE_VENDOR |
 				 USB_RECIP_DEVICE, value, index, buf,
 				 size, 2 * HZ);

 	if (ret < 0) {
 		ath6kl_dbg(ATH6KL_DBG_USB, "%s failed,result = %d\n",
 			   __func__, ret);
 	}

 	memcpy((u8 *) data, buf, size);

 	kfree(buf);

 	return 0;
 }

 static int ath6kl_usb_ctrl_msg_exchange(struct ath6kl_usb *ar_usb,
 				     u8 req_val, u8 *req_buf, u32 req_len,
 				     u8 resp_val, u8 *resp_buf, u32 *resp_len)
 {
 	int ret;

 	/* send command */
 	ret = ath6kl_usb_submit_ctrl_out(ar_usb, req_val, 0, 0,
 					 req_buf, req_len);

 	if (ret != 0)
 		return ret;

 	if (resp_buf == NULL) {
 		/* no expected response */
 		return ret;
 	}

 	/* get response */
 	ret = ath6kl_usb_submit_ctrl_in(ar_usb, resp_val, 0, 0,
 					resp_buf, *resp_len);

 	return ret;
 }

 static int ath6kl_usb_diag_read32(struct ath6kl *ar, u32 address, u32 *data)
 {
 	struct ath6kl_usb *ar_usb = ar->hif_priv;
 	struct ath6kl_usb_ctrl_diag_resp_read *resp;
 	struct ath6kl_usb_ctrl_diag_cmd_read *cmd;
 	u32 resp_len;
 	int ret;

 	cmd = (struct ath6kl_usb_ctrl_diag_cmd_read *) ar_usb->diag_cmd_buffer;

 	memset(cmd, 0, sizeof(*cmd));
 	cmd->cmd = ATH6KL_USB_CTRL_DIAG_CC_READ;
 	cmd->address = cpu_to_le32(address);
 	resp_len = sizeof(*resp);

 	ret = ath6kl_usb_ctrl_msg_exchange(ar_usb,
 				ATH6KL_USB_CONTROL_REQ_DIAG_CMD,
 				(u8 *) cmd,
 				sizeof(struct ath6kl_usb_ctrl_diag_cmd_write),
 				ATH6KL_USB_CONTROL_REQ_DIAG_RESP,
 				ar_usb->diag_resp_buffer, &resp_len);

 	if (ret)
 		return ret;

 	resp = (struct ath6kl_usb_ctrl_diag_resp_read *)
 		ar_usb->diag_resp_buffer;

 	*data = le32_to_cpu(resp->value);

 	return ret;
 }

 static int ath6kl_usb_diag_write32(struct ath6kl *ar, u32 address, __le32 data)
 {
 	struct ath6kl_usb *ar_usb = ar->hif_priv;
 	struct ath6kl_usb_ctrl_diag_cmd_write *cmd;

 	cmd = (struct ath6kl_usb_ctrl_diag_cmd_write *) ar_usb->diag_cmd_buffer;

 	memset(cmd, 0, sizeof(struct ath6kl_usb_ctrl_diag_cmd_write));
 	cmd->cmd = cpu_to_le32(ATH6KL_USB_CTRL_DIAG_CC_WRITE);
 	cmd->address = cpu_to_le32(address);
 	cmd->value = data;

 	return ath6kl_usb_ctrl_msg_exchange(ar_usb,
 					    ATH6KL_USB_CONTROL_REQ_DIAG_CMD,
 					    (u8 *) cmd,
 					    sizeof(*cmd),
 					    0, NULL, NULL);

 }

 static int ath6kl_usb_bmi_read(struct ath6kl *ar, u8 *buf, u32 len)
 {
 	struct ath6kl_usb *ar_usb = ar->hif_priv;
 	int ret;

 	/* get response */
 	ret = ath6kl_usb_submit_ctrl_in(ar_usb,
 					ATH6KL_USB_CONTROL_REQ_RECV_BMI_RESP,
 					0, 0, buf, len);
 	if (ret != 0) {
 		ath6kl_err("Unable to read the bmi data from the device: %d\n",
 			   ret);
 		return ret;
 	}

 	return 0;
 }

 static int ath6kl_usb_bmi_write(struct ath6kl *ar, u8 *buf, u32 len)
 {
 	struct ath6kl_usb *ar_usb = ar->hif_priv;
 	int ret;

 	/* send command */
 	ret = ath6kl_usb_submit_ctrl_out(ar_usb,
 					 ATH6KL_USB_CONTROL_REQ_SEND_BMI_CMD,
 					 0, 0, buf, len);
 	if (ret != 0) {
 		ath6kl_err("unable to send the bmi data to the device: %d\n",
 			   ret);
 		return ret;
 	}

 	return 0;
 }

 static int ath6kl_usb_power_on(struct ath6kl *ar)
 {
 	return 0;
 }

 static int ath6kl_usb_power_off(struct ath6kl *ar)
 {
 	return 0;
 }

 static const struct ath6kl_hif_ops ath6kl_usb_ops = {
 	.diag_read32 = ath6kl_usb_diag_read32,
 	.diag_write32 = ath6kl_usb_diag_write32,
 	.bmi_read = ath6kl_usb_bmi_read,
 	.bmi_write = ath6kl_usb_bmi_write,
 	.power_on = ath6kl_usb_power_on,
 	.power_off = ath6kl_usb_power_off,
 };

 /* ath6kl usb driver registered functions */
 static int ath6kl_usb_probe(struct usb_interface *interface,
 			    const struct usb_device_id *id)
 {
 	struct usb_device *dev = interface_to_usbdev(interface);
 	struct ath6kl *ar;
 	struct ath6kl_usb *ar_usb = NULL;
 	int vendor_id, product_id;
 	int ret = 0;

 	usb_get_dev(dev);

 	vendor_id = le16_to_cpu(dev->descriptor.idVendor);
 	product_id = le16_to_cpu(dev->descriptor.idProduct);

 	ath6kl_dbg(ATH6KL_DBG_USB, "vendor_id = %04x\n", vendor_id);
 	ath6kl_dbg(ATH6KL_DBG_USB, "product_id = %04x\n", product_id);

 	if (interface->cur_altsetting)
 		ath6kl_dbg(ATH6KL_DBG_USB, "USB Interface %d\n",
 			   interface->cur_altsetting->desc.bInterfaceNumber);


 	if (dev->speed == USB_SPEED_HIGH)
 		ath6kl_dbg(ATH6KL_DBG_USB, "USB 2.0 Host\n");
 	else
 		ath6kl_dbg(ATH6KL_DBG_USB, "USB 1.1 Host\n");

 	ar_usb = ath6kl_usb_create(interface);

 	if (ar_usb == NULL) {
 		ret = -ENOMEM;
 		goto err_usb_put;
 	}

 	ar = ath6kl_core_create(&ar_usb->udev->dev);
 	if (ar == NULL) {
 		ath6kl_err("Failed to alloc ath6kl core\n");
 		ret = -ENOMEM;
 		goto err_usb_destroy;
 	}

 	ar->hif_priv = ar_usb;
 	ar->hif_type = ATH6KL_HIF_TYPE_USB;
 	ar->hif_ops = &ath6kl_usb_ops;
 	ar->mbox_info.block_size = 16;
 	ar->bmi.max_data_size = 252;

 	ar_usb->ar = ar;

 	ret = ath6kl_core_init(ar);
 	if (ret) {
 		ath6kl_err("Failed to init ath6kl core: %d\n", ret);
 		goto err_core_free;
 	}

 	return ret;

 err_core_free:
 	ath6kl_core_destroy(ar);
 err_usb_destroy:
 	ath6kl_usb_destroy(ar_usb);
 err_usb_put:
 	usb_put_dev(dev);

 	return ret;
 }

 static void ath6kl_usb_remove(struct usb_interface *interface)
 {
 	usb_put_dev(interface_to_usbdev(interface));
 	ath6kl_usb_device_detached(interface);
 }

 /* table of devices that work with this driver */
 static struct usb_device_id ath6kl_usb_ids[] = {
 	{USB_DEVICE(0x0cf3, 0x9374)},
 	{ /* Terminating entry */ },
 };

 MODULE_DEVICE_TABLE(usb, ath6kl_usb_ids);

 static struct usb_driver ath6kl_usb_driver = {
 	.name = "ath6kl_usb",
 	.probe = ath6kl_usb_probe,
 	.disconnect = ath6kl_usb_remove,
 	.id_table = ath6kl_usb_ids,
 };

 static int ath6kl_usb_init(void)
 {
 	usb_register(&ath6kl_usb_driver);
 	return 0;
 }

 static void ath6kl_usb_exit(void)
 {
 	usb_deregister(&ath6kl_usb_driver);
 }

 module_init(ath6kl_usb_init);
 module_exit(ath6kl_usb_exit);

 MODULE_AUTHOR("Atheros Communications, Inc.");
 MODULE_DESCRIPTION("Driver support for Atheros AR600x USB devices");
 MODULE_LICENSE("Dual BSD/GPL");
 MODULE_FIRMWARE(AR6004_HW_1_0_FIRMWARE_FILE);
 MODULE_FIRMWARE(AR6004_HW_1_0_BOARD_DATA_FILE);
 MODULE_FIRMWARE(AR6004_HW_1_0_DEFAULT_BOARD_DATA_FILE);
 MODULE_FIRMWARE(AR6004_HW_1_1_FIRMWARE_FILE);
 MODULE_FIRMWARE(AR6004_HW_1_1_BOARD_DATA_FILE);
 MODULE_FIRMWARE(AR6004_HW_1_1_DEFAULT_BOARD_DATA_FILE);
	/*
	* Copyright (c) 2007-2011 Atheros Communications Inc.
	* Copyright (c) 2011-2012 Qualcomm Atheros, Inc.
	*
	* Permission to use, copy, modify, and/or distribute this software for any
	* purpose with or without fee is hereby granted, provided that the above
	* copyright notice and this permission notice appear in all copies.
	*
	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	*/

	#include <linux/module.h>
	#include <linux/usb.h>

	#include "debug.h"
	#include "core.h"

	/* usb device object */
	struct ath6kl_usb {
	struct usb_device *udev;
	struct usb_interface *interface;
	u8 *diag_cmd_buffer;
	u8 *diag_resp_buffer;
	struct ath6kl *ar;
	};

	/* diagnostic command defnitions */
	#define ATH6KL_USB_CONTROL_REQ_SEND_BMI_CMD 1
	#define ATH6KL_USB_CONTROL_REQ_RECV_BMI_RESP 2
	#define ATH6KL_USB_CONTROL_REQ_DIAG_CMD 3
	#define ATH6KL_USB_CONTROL_REQ_DIAG_RESP 4

	#define ATH6KL_USB_CTRL_DIAG_CC_READ 0
	#define ATH6KL_USB_CTRL_DIAG_CC_WRITE 1

	struct ath6kl_usb_ctrl_diag_cmd_write {
	__le32 cmd;
	__le32 address;
	__le32 value;
	__le32 _pad[1];
	} __packed;

	struct ath6kl_usb_ctrl_diag_cmd_read {
	__le32 cmd;
	__le32 address;
	} __packed;

	struct ath6kl_usb_ctrl_diag_resp_read {
	__le32 value;
	} __packed;

	#define ATH6KL_USB_MAX_DIAG_CMD (sizeof(struct ath6kl_usb_ctrl_diag_cmd_write))
	#define ATH6KL_USB_MAX_DIAG_RESP (sizeof(struct ath6kl_usb_ctrl_diag_resp_read))

	static void ath6kl_usb_destroy(struct ath6kl_usb *ar_usb)
	{
	usb_set_intfdata(ar_usb->interface, NULL);

	kfree(ar_usb->diag_cmd_buffer);
	kfree(ar_usb->diag_resp_buffer);

	kfree(ar_usb);
	}

	static struct ath6kl_usb ath6kl_usb_create(struct usb_interface interface)
	{
	struct ath6kl_usb *ar_usb = NULL;
	struct usb_device *dev = interface_to_usbdev(interface);
	int status = 0;

	ar_usb = kzalloc(sizeof(struct ath6kl_usb), GFP_KERNEL);
	if (ar_usb == NULL)
	goto fail_ath6kl_usb_create;

	memset(ar_usb, 0, sizeof(struct ath6kl_usb));
	usb_set_intfdata(interface, ar_usb);
	ar_usb->udev = dev;
	ar_usb->interface = interface;

	ar_usb->diag_cmd_buffer = kzalloc(ATH6KL_USB_MAX_DIAG_CMD, GFP_KERNEL);
	if (ar_usb->diag_cmd_buffer == NULL) {
	status = -ENOMEM;
	goto fail_ath6kl_usb_create;
	}

	ar_usb->diag_resp_buffer = kzalloc(ATH6KL_USB_MAX_DIAG_RESP,
	GFP_KERNEL);
	if (ar_usb->diag_resp_buffer == NULL) {
	status = -ENOMEM;
	goto fail_ath6kl_usb_create;
	}

	fail_ath6kl_usb_create:
	if (status != 0) {
	ath6kl_usb_destroy(ar_usb);
	ar_usb = NULL;
	}
	return ar_usb;
	}

	static void ath6kl_usb_device_detached(struct usb_interface *interface)
	{
	struct ath6kl_usb *ar_usb;

	ar_usb = usb_get_intfdata(interface);
	if (ar_usb == NULL)
	return;

	ath6kl_stop_txrx(ar_usb->ar);

	ath6kl_core_cleanup(ar_usb->ar);

	ath6kl_usb_destroy(ar_usb);
	}

	static int ath6kl_usb_submit_ctrl_out(struct ath6kl_usb *ar_usb,
	u8 req, u16 value, u16 index, void *data,
	u32 size)
	{
	u8 *buf = NULL;
	int ret;

	if (size > 0) {
	buf = kmalloc(size, GFP_KERNEL);
	if (buf == NULL)
	return -ENOMEM;

	memcpy(buf, data, size);
	}

	/* note: if successful returns number of bytes transfered */
	ret = usb_control_msg(ar_usb->udev,
	usb_sndctrlpipe(ar_usb->udev, 0),
	req,
	USB_DIR_OUT \| USB_TYPE_VENDOR \|
	USB_RECIP_DEVICE, value, index, buf,
	size, 1000);

	if (ret < 0) {
	ath6kl_dbg(ATH6KL_DBG_USB, "%s failed,result = %d\n",
	__func__, ret);
	}

	kfree(buf);

	return 0;
	}

	static int ath6kl_usb_submit_ctrl_in(struct ath6kl_usb *ar_usb,
	u8 req, u16 value, u16 index, void *data,
	u32 size)
	{
	u8 *buf = NULL;
	int ret;

	if (size > 0) {
	buf = kmalloc(size, GFP_KERNEL);
	if (buf == NULL)
	return -ENOMEM;
	}

	/* note: if successful returns number of bytes transfered */
	ret = usb_control_msg(ar_usb->udev,
	usb_rcvctrlpipe(ar_usb->udev, 0),
	req,
	USB_DIR_IN \| USB_TYPE_VENDOR \|
	USB_RECIP_DEVICE, value, index, buf,
	size, 2 * HZ);

	if (ret < 0) {
	ath6kl_dbg(ATH6KL_DBG_USB, "%s failed,result = %d\n",
	__func__, ret);
	}

	memcpy((u8 *) data, buf, size);

	kfree(buf);

	return 0;
	}

	static int ath6kl_usb_ctrl_msg_exchange(struct ath6kl_usb *ar_usb,
	u8 req_val, u8 *req_buf, u32 req_len,
	u8 resp_val, u8 resp_buf, u32 resp_len)
	{
	int ret;

	/* send command */
	ret = ath6kl_usb_submit_ctrl_out(ar_usb, req_val, 0, 0,
	req_buf, req_len);

	if (ret != 0)
	return ret;

	if (resp_buf == NULL) {
	/* no expected response */
	return ret;
	}

	/* get response */
	ret = ath6kl_usb_submit_ctrl_in(ar_usb, resp_val, 0, 0,
	resp_buf, *resp_len);

	return ret;
	}

	static int ath6kl_usb_diag_read32(struct ath6kl ar, u32 address, u32 data)
	{
	struct ath6kl_usb *ar_usb = ar->hif_priv;
	struct ath6kl_usb_ctrl_diag_resp_read *resp;
	struct ath6kl_usb_ctrl_diag_cmd_read *cmd;
	u32 resp_len;
	int ret;

	cmd = (struct ath6kl_usb_ctrl_diag_cmd_read *) ar_usb->diag_cmd_buffer;

	memset(cmd, 0, sizeof(*cmd));
	cmd->cmd = ATH6KL_USB_CTRL_DIAG_CC_READ;
	cmd->address = cpu_to_le32(address);
	resp_len = sizeof(*resp);

	ret = ath6kl_usb_ctrl_msg_exchange(ar_usb,
	ATH6KL_USB_CONTROL_REQ_DIAG_CMD,
	(u8 *) cmd,
	sizeof(struct ath6kl_usb_ctrl_diag_cmd_write),
	ATH6KL_USB_CONTROL_REQ_DIAG_RESP,
	ar_usb->diag_resp_buffer, &resp_len);

	if (ret)
	return ret;

	resp = (struct ath6kl_usb_ctrl_diag_resp_read *)
	ar_usb->diag_resp_buffer;

	*data = le32_to_cpu(resp->value);

	return ret;
	}

	static int ath6kl_usb_diag_write32(struct ath6kl *ar, u32 address, __le32 data)
	{
	struct ath6kl_usb *ar_usb = ar->hif_priv;
	struct ath6kl_usb_ctrl_diag_cmd_write *cmd;

	cmd = (struct ath6kl_usb_ctrl_diag_cmd_write *) ar_usb->diag_cmd_buffer;

	memset(cmd, 0, sizeof(struct ath6kl_usb_ctrl_diag_cmd_write));
	cmd->cmd = cpu_to_le32(ATH6KL_USB_CTRL_DIAG_CC_WRITE);
	cmd->address = cpu_to_le32(address);
	cmd->value = data;

	return ath6kl_usb_ctrl_msg_exchange(ar_usb,
	ATH6KL_USB_CONTROL_REQ_DIAG_CMD,
	(u8 *) cmd,
	sizeof(*cmd),
	0, NULL, NULL);

	}

	static int ath6kl_usb_bmi_read(struct ath6kl ar, u8 buf, u32 len)
	{
	struct ath6kl_usb *ar_usb = ar->hif_priv;
	int ret;

	/* get response */
	ret = ath6kl_usb_submit_ctrl_in(ar_usb,
	ATH6KL_USB_CONTROL_REQ_RECV_BMI_RESP,
	0, 0, buf, len);
	if (ret != 0) {
	ath6kl_err("Unable to read the bmi data from the device: %d\n",
	ret);
	return ret;
	}

	return 0;
	}

	static int ath6kl_usb_bmi_write(struct ath6kl ar, u8 buf, u32 len)
	{
	struct ath6kl_usb *ar_usb = ar->hif_priv;
	int ret;

	/* send command */
	ret = ath6kl_usb_submit_ctrl_out(ar_usb,
	ATH6KL_USB_CONTROL_REQ_SEND_BMI_CMD,
	0, 0, buf, len);
	if (ret != 0) {
	ath6kl_err("unable to send the bmi data to the device: %d\n",
	ret);
	return ret;
	}

	return 0;
	}

	static int ath6kl_usb_power_on(struct ath6kl *ar)
	{
	return 0;
	}

	static int ath6kl_usb_power_off(struct ath6kl *ar)
	{
	return 0;
	}

	static const struct ath6kl_hif_ops ath6kl_usb_ops = {
	.diag_read32 = ath6kl_usb_diag_read32,
	.diag_write32 = ath6kl_usb_diag_write32,
	.bmi_read = ath6kl_usb_bmi_read,
	.bmi_write = ath6kl_usb_bmi_write,
	.power_on = ath6kl_usb_power_on,
	.power_off = ath6kl_usb_power_off,
	};

	/* ath6kl usb driver registered functions */
	static int ath6kl_usb_probe(struct usb_interface *interface,
	const struct usb_device_id *id)
	{
	struct usb_device *dev = interface_to_usbdev(interface);
	struct ath6kl *ar;
	struct ath6kl_usb *ar_usb = NULL;
	int vendor_id, product_id;
	int ret = 0;

	usb_get_dev(dev);

	vendor_id = le16_to_cpu(dev->descriptor.idVendor);
	product_id = le16_to_cpu(dev->descriptor.idProduct);

	ath6kl_dbg(ATH6KL_DBG_USB, "vendor_id = %04x\n", vendor_id);
	ath6kl_dbg(ATH6KL_DBG_USB, "product_id = %04x\n", product_id);

	if (interface->cur_altsetting)
	ath6kl_dbg(ATH6KL_DBG_USB, "USB Interface %d\n",
	interface->cur_altsetting->desc.bInterfaceNumber);


	if (dev->speed == USB_SPEED_HIGH)
	ath6kl_dbg(ATH6KL_DBG_USB, "USB 2.0 Host\n");
	else
	ath6kl_dbg(ATH6KL_DBG_USB, "USB 1.1 Host\n");

	ar_usb = ath6kl_usb_create(interface);

	if (ar_usb == NULL) {
	ret = -ENOMEM;
	goto err_usb_put;
	}

	ar = ath6kl_core_create(&ar_usb->udev->dev);
	if (ar == NULL) {
	ath6kl_err("Failed to alloc ath6kl core\n");
	ret = -ENOMEM;
	goto err_usb_destroy;
	}

	ar->hif_priv = ar_usb;
	ar->hif_type = ATH6KL_HIF_TYPE_USB;
	ar->hif_ops = &ath6kl_usb_ops;
	ar->mbox_info.block_size = 16;
	ar->bmi.max_data_size = 252;

	ar_usb->ar = ar;

	ret = ath6kl_core_init(ar);
	if (ret) {
	ath6kl_err("Failed to init ath6kl core: %d\n", ret);
	goto err_core_free;
	}

	return ret;

	err_core_free:
	ath6kl_core_destroy(ar);
	err_usb_destroy:
	ath6kl_usb_destroy(ar_usb);
	err_usb_put:
	usb_put_dev(dev);

	return ret;
	}

	static void ath6kl_usb_remove(struct usb_interface *interface)
	{
	usb_put_dev(interface_to_usbdev(interface));
	ath6kl_usb_device_detached(interface);
	}

	/* table of devices that work with this driver */
	static struct usb_device_id ath6kl_usb_ids[] = {
	{USB_DEVICE(0x0cf3, 0x9374)},
	{ /* Terminating entry */ },
	};

	MODULE_DEVICE_TABLE(usb, ath6kl_usb_ids);

	static struct usb_driver ath6kl_usb_driver = {
	.name = "ath6kl_usb",
	.probe = ath6kl_usb_probe,
	.disconnect = ath6kl_usb_remove,
	.id_table = ath6kl_usb_ids,
	};

	static int ath6kl_usb_init(void)
	{
	usb_register(&ath6kl_usb_driver);
	return 0;
	}

	static void ath6kl_usb_exit(void)
	{
	usb_deregister(&ath6kl_usb_driver);
	}

	module_init(ath6kl_usb_init);
	module_exit(ath6kl_usb_exit);

	MODULE_AUTHOR("Atheros Communications, Inc.");
	MODULE_DESCRIPTION("Driver support for Atheros AR600x USB devices");
	MODULE_LICENSE("Dual BSD/GPL");
	MODULE_FIRMWARE(AR6004_HW_1_0_FIRMWARE_FILE);
	MODULE_FIRMWARE(AR6004_HW_1_0_BOARD_DATA_FILE);
	MODULE_FIRMWARE(AR6004_HW_1_0_DEFAULT_BOARD_DATA_FILE);
	MODULE_FIRMWARE(AR6004_HW_1_1_FIRMWARE_FILE);
	MODULE_FIRMWARE(AR6004_HW_1_1_BOARD_DATA_FILE);
	MODULE_FIRMWARE(AR6004_HW_1_1_DEFAULT_BOARD_DATA_FILE);