drivers/bluetooth/ath3k.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Copyright (c) 2008-2009 Atheros Communications Inc.
  */


 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/types.h>
 #include <linux/errno.h>
 #include <linux/device.h>
 #include <linux/firmware.h>
 #include <linux/usb.h>
 #include <asm/unaligned.h>
 #include <net/bluetooth/bluetooth.h>

 #define VERSION "1.0"
 #define ATH3K_FIRMWARE	"ath3k-1.fw"

 #define ATH3K_DNLOAD				0x01
 #define ATH3K_GETSTATE				0x05
 #define ATH3K_SET_NORMAL_MODE			0x07
 #define ATH3K_GETVERSION			0x09
 #define USB_REG_SWITCH_VID_PID			0x0a

 #define ATH3K_MODE_MASK				0x3F
 #define ATH3K_NORMAL_MODE			0x0E

 #define ATH3K_PATCH_UPDATE			0x80
 #define ATH3K_SYSCFG_UPDATE			0x40

 #define ATH3K_XTAL_FREQ_26M			0x00
 #define ATH3K_XTAL_FREQ_40M			0x01
 #define ATH3K_XTAL_FREQ_19P2			0x02
 #define ATH3K_NAME_LEN				0xFF

 struct ath3k_version {
 	__le32	rom_version;
 	__le32	build_version;
 	__le32	ram_version;
 	__u8	ref_clock;
 	__u8	reserved[7];
 } __packed;

 static const struct usb_device_id ath3k_table[] = {
 	/* Atheros AR3011 */
 	{ USB_DEVICE(0x0CF3, 0x3000) },

 	/* Atheros AR3011 with sflash firmware*/
 	{ USB_DEVICE(0x0489, 0xE027) },
 	{ USB_DEVICE(0x0489, 0xE03D) },
 	{ USB_DEVICE(0x04F2, 0xAFF1) },
 	{ USB_DEVICE(0x0930, 0x0215) },
 	{ USB_DEVICE(0x0CF3, 0x3002) },
 	{ USB_DEVICE(0x0CF3, 0xE019) },
 	{ USB_DEVICE(0x13d3, 0x3304) },

 	/* Atheros AR9285 Malbec with sflash firmware */
 	{ USB_DEVICE(0x03F0, 0x311D) },

 	/* Atheros AR3012 with sflash firmware*/
 	{ USB_DEVICE(0x0489, 0xe04d) },
 	{ USB_DEVICE(0x0489, 0xe04e) },
 	{ USB_DEVICE(0x0489, 0xe057) },
 	{ USB_DEVICE(0x0489, 0xe056) },
 	{ USB_DEVICE(0x0489, 0xe05f) },
 	{ USB_DEVICE(0x0489, 0xe076) },
 	{ USB_DEVICE(0x0489, 0xe078) },
 	{ USB_DEVICE(0x0489, 0xe095) },
 	{ USB_DEVICE(0x04c5, 0x1330) },
 	{ USB_DEVICE(0x04CA, 0x3004) },
 	{ USB_DEVICE(0x04CA, 0x3005) },
 	{ USB_DEVICE(0x04CA, 0x3006) },
 	{ USB_DEVICE(0x04CA, 0x3007) },
 	{ USB_DEVICE(0x04CA, 0x3008) },
 	{ USB_DEVICE(0x04CA, 0x300b) },
 	{ USB_DEVICE(0x04CA, 0x300d) },
 	{ USB_DEVICE(0x04CA, 0x300f) },
 	{ USB_DEVICE(0x04CA, 0x3010) },
 	{ USB_DEVICE(0x04CA, 0x3014) },
 	{ USB_DEVICE(0x04CA, 0x3018) },
 	{ USB_DEVICE(0x0930, 0x0219) },
 	{ USB_DEVICE(0x0930, 0x021c) },
 	{ USB_DEVICE(0x0930, 0x0220) },
 	{ USB_DEVICE(0x0930, 0x0227) },
 	{ USB_DEVICE(0x0b05, 0x17d0) },
 	{ USB_DEVICE(0x0CF3, 0x0036) },
 	{ USB_DEVICE(0x0CF3, 0x3004) },
 	{ USB_DEVICE(0x0CF3, 0x3008) },
 	{ USB_DEVICE(0x0CF3, 0x311D) },
 	{ USB_DEVICE(0x0CF3, 0x311E) },
 	{ USB_DEVICE(0x0CF3, 0x311F) },
 	{ USB_DEVICE(0x0cf3, 0x3121) },
 	{ USB_DEVICE(0x0CF3, 0x817a) },
 	{ USB_DEVICE(0x0CF3, 0x817b) },
 	{ USB_DEVICE(0x0cf3, 0xe003) },
 	{ USB_DEVICE(0x0CF3, 0xE004) },
 	{ USB_DEVICE(0x0CF3, 0xE005) },
 	{ USB_DEVICE(0x0CF3, 0xE006) },
 	{ USB_DEVICE(0x13d3, 0x3362) },
 	{ USB_DEVICE(0x13d3, 0x3375) },
 	{ USB_DEVICE(0x13d3, 0x3393) },
 	{ USB_DEVICE(0x13d3, 0x3395) },
 	{ USB_DEVICE(0x13d3, 0x3402) },
 	{ USB_DEVICE(0x13d3, 0x3408) },
 	{ USB_DEVICE(0x13d3, 0x3423) },
 	{ USB_DEVICE(0x13d3, 0x3432) },
 	{ USB_DEVICE(0x13d3, 0x3472) },
 	{ USB_DEVICE(0x13d3, 0x3474) },
 	{ USB_DEVICE(0x13d3, 0x3487) },
 	{ USB_DEVICE(0x13d3, 0x3490) },

 	/* Atheros AR5BBU12 with sflash firmware */
 	{ USB_DEVICE(0x0489, 0xE02C) },

 	/* Atheros AR5BBU22 with sflash firmware */
 	{ USB_DEVICE(0x0489, 0xE036) },
 	{ USB_DEVICE(0x0489, 0xE03C) },

 	{ }	/* Terminating entry */
 };

 MODULE_DEVICE_TABLE(usb, ath3k_table);

 #define BTUSB_ATH3012		0x80
 /* This table is to load patch and sysconfig files
  * for AR3012
  */
 static const struct usb_device_id ath3k_blist_tbl[] = {

 	/* Atheros AR3012 with sflash firmware*/
 	{ USB_DEVICE(0x0489, 0xe04e), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0489, 0xe04d), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0489, 0xe056), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0489, 0xe057), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0489, 0xe05f), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0489, 0xe076), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0489, 0xe078), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0489, 0xe095), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x04c5, 0x1330), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x04ca, 0x3004), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x04ca, 0x3005), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x04ca, 0x3006), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x04ca, 0x3007), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x04ca, 0x300b), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x04ca, 0x300d), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x04ca, 0x300f), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x04ca, 0x3010), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x04ca, 0x3014), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x04ca, 0x3018), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0930, 0x021c), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0930, 0x0227), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0b05, 0x17d0), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0CF3, 0x0036), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0cf3, 0x3008), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0cf3, 0x311D), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0cf3, 0x311E), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0cf3, 0x311F), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0cf3, 0x3121), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0CF3, 0x817a), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0CF3, 0x817b), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0cf3, 0xe004), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0cf3, 0xe005), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0cf3, 0xe006), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0cf3, 0xe003), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3362), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3395), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3402), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3408), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3423), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3432), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3472), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3474), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3487), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x13d3, 0x3490), .driver_info = BTUSB_ATH3012 },

 	/* Atheros AR5BBU22 with sflash firmware */
 	{ USB_DEVICE(0x0489, 0xE036), .driver_info = BTUSB_ATH3012 },
 	{ USB_DEVICE(0x0489, 0xE03C), .driver_info = BTUSB_ATH3012 },

 	{ }	/* Terminating entry */
 };

 static inline void ath3k_log_failed_loading(int err, int len, int size,
 					    int count)
 {
 	BT_ERR("Firmware loading err = %d, len = %d, size = %d, count = %d",
 	       err, len, size, count);
 }

 #define USB_REQ_DFU_DNLOAD	1
 #define BULK_SIZE		4096
 #define FW_HDR_SIZE		20
 #define TIMEGAP_USEC_MIN	50
 #define TIMEGAP_USEC_MAX	100

 static int ath3k_load_firmware(struct usb_device *udev,
 				const struct firmware *firmware)
 {
 	u8 *send_buf;
 	int len = 0;
 	int err, pipe, size, sent = 0;
 	int count = firmware->size;

 	BT_DBG("udev %p", udev);

 	pipe = usb_sndctrlpipe(udev, 0);

 	send_buf = kmalloc(BULK_SIZE, GFP_KERNEL);
 	if (!send_buf) {
 		BT_ERR("Can't allocate memory chunk for firmware");
 		return -ENOMEM;
 	}

 	memcpy(send_buf, firmware->data, FW_HDR_SIZE);
 	err = usb_control_msg(udev, pipe, USB_REQ_DFU_DNLOAD, USB_TYPE_VENDOR,
 			      0, 0, send_buf, FW_HDR_SIZE,
 			      USB_CTRL_SET_TIMEOUT);
 	if (err < 0) {
 		BT_ERR("Can't change to loading configuration err");
 		goto error;
 	}
 	sent += FW_HDR_SIZE;
 	count -= FW_HDR_SIZE;

 	pipe = usb_sndbulkpipe(udev, 0x02);

 	while (count) {
 		/* workaround the compatibility issue with xHCI controller*/
 		usleep_range(TIMEGAP_USEC_MIN, TIMEGAP_USEC_MAX);

 		size = min_t(uint, count, BULK_SIZE);
 		memcpy(send_buf, firmware->data + sent, size);

 		err = usb_bulk_msg(udev, pipe, send_buf, size,
 					&len, 3000);

 		if (err || (len != size)) {
 			ath3k_log_failed_loading(err, len, size, count);
 			goto error;
 		}

 		sent  += size;
 		count -= size;
 	}

 error:
 	kfree(send_buf);
 	return err;
 }

 static int ath3k_get_state(struct usb_device *udev, unsigned char *state)
 {
 	int ret, pipe = 0;
 	char *buf;

 	buf = kmalloc(sizeof(*buf), GFP_KERNEL);
 	if (!buf)
 		return -ENOMEM;

 	pipe = usb_rcvctrlpipe(udev, 0);
 	ret = usb_control_msg(udev, pipe, ATH3K_GETSTATE,
 			      USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
 			      buf, sizeof(*buf), USB_CTRL_SET_TIMEOUT);

 	*state = *buf;
 	kfree(buf);

 	return ret;
 }

 static int ath3k_get_version(struct usb_device *udev,
 			struct ath3k_version *version)
 {
 	int ret, pipe = 0;
 	struct ath3k_version *buf;
 	const int size = sizeof(*buf);

 	buf = kmalloc(size, GFP_KERNEL);
 	if (!buf)
 		return -ENOMEM;

 	pipe = usb_rcvctrlpipe(udev, 0);
 	ret = usb_control_msg(udev, pipe, ATH3K_GETVERSION,
 			      USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
 			      buf, size, USB_CTRL_SET_TIMEOUT);

 	memcpy(version, buf, size);
 	kfree(buf);

 	return ret;
 }

 static int ath3k_load_fwfile(struct usb_device *udev,
 		const struct firmware *firmware)
 {
 	u8 *send_buf;
 	int len = 0;
 	int err, pipe, size, count, sent = 0;
 	int ret;

 	count = firmware->size;

 	send_buf = kmalloc(BULK_SIZE, GFP_KERNEL);
 	if (!send_buf) {
 		BT_ERR("Can't allocate memory chunk for firmware");
 		return -ENOMEM;
 	}

 	size = min_t(uint, count, FW_HDR_SIZE);
 	memcpy(send_buf, firmware->data, size);

 	pipe = usb_sndctrlpipe(udev, 0);
 	ret = usb_control_msg(udev, pipe, ATH3K_DNLOAD,
 			USB_TYPE_VENDOR, 0, 0, send_buf,
 			size, USB_CTRL_SET_TIMEOUT);
 	if (ret < 0) {
 		BT_ERR("Can't change to loading configuration err");
 		kfree(send_buf);
 		return ret;
 	}

 	sent += size;
 	count -= size;

 	pipe = usb_sndbulkpipe(udev, 0x02);

 	while (count) {
 		/* workaround the compatibility issue with xHCI controller*/
 		usleep_range(TIMEGAP_USEC_MIN, TIMEGAP_USEC_MAX);

 		size = min_t(uint, count, BULK_SIZE);
 		memcpy(send_buf, firmware->data + sent, size);

 		err = usb_bulk_msg(udev, pipe, send_buf, size,
 					&len, 3000);
 		if (err || (len != size)) {
 			ath3k_log_failed_loading(err, len, size, count);
 			kfree(send_buf);
 			return err;
 		}
 		sent  += size;
 		count -= size;
 	}

 	kfree(send_buf);
 	return 0;
 }

 static int ath3k_switch_pid(struct usb_device *udev)
 {
 	int pipe = 0;

 	pipe = usb_sndctrlpipe(udev, 0);
 	return usb_control_msg(udev, pipe, USB_REG_SWITCH_VID_PID,
 			USB_TYPE_VENDOR, 0, 0,
 			NULL, 0, USB_CTRL_SET_TIMEOUT);
 }

 static int ath3k_set_normal_mode(struct usb_device *udev)
 {
 	unsigned char fw_state;
 	int pipe = 0, ret;

 	ret = ath3k_get_state(udev, &fw_state);
 	if (ret < 0) {
 		BT_ERR("Can't get state to change to normal mode err");
 		return ret;
 	}

 	if ((fw_state & ATH3K_MODE_MASK) == ATH3K_NORMAL_MODE) {
 		BT_DBG("firmware was already in normal mode");
 		return 0;
 	}

 	pipe = usb_sndctrlpipe(udev, 0);
 	return usb_control_msg(udev, pipe, ATH3K_SET_NORMAL_MODE,
 			USB_TYPE_VENDOR, 0, 0,
 			NULL, 0, USB_CTRL_SET_TIMEOUT);
 }

 static int ath3k_load_patch(struct usb_device *udev)
 {
 	unsigned char fw_state;
 	char filename[ATH3K_NAME_LEN];
 	const struct firmware *firmware;
 	struct ath3k_version fw_version;
 	__u32 pt_rom_version, pt_build_version;
 	int ret;

 	ret = ath3k_get_state(udev, &fw_state);
 	if (ret < 0) {
 		BT_ERR("Can't get state to change to load ram patch err");
 		return ret;
 	}

 	if (fw_state & ATH3K_PATCH_UPDATE) {
 		BT_DBG("Patch was already downloaded");
 		return 0;
 	}

 	ret = ath3k_get_version(udev, &fw_version);
 	if (ret < 0) {
 		BT_ERR("Can't get version to change to load ram patch err");
 		return ret;
 	}

 	snprintf(filename, ATH3K_NAME_LEN, "ar3k/AthrBT_0x%08x.dfu",
 		 le32_to_cpu(fw_version.rom_version));

 	ret = request_firmware(&firmware, filename, &udev->dev);
 	if (ret < 0) {
 		BT_ERR("Patch file not found %s", filename);
 		return ret;
 	}

 	pt_rom_version = get_unaligned_le32(firmware->data +
 					    firmware->size - 8);
 	pt_build_version = get_unaligned_le32(firmware->data +
 					      firmware->size - 4);

 	if (pt_rom_version != le32_to_cpu(fw_version.rom_version) ||
 	    pt_build_version <= le32_to_cpu(fw_version.build_version)) {
 		BT_ERR("Patch file version did not match with firmware");
 		release_firmware(firmware);
 		return -EINVAL;
 	}

 	ret = ath3k_load_fwfile(udev, firmware);
 	release_firmware(firmware);

 	return ret;
 }

 static int ath3k_load_syscfg(struct usb_device *udev)
 {
 	unsigned char fw_state;
 	char filename[ATH3K_NAME_LEN];
 	const struct firmware *firmware;
 	struct ath3k_version fw_version;
 	int clk_value, ret;

 	ret = ath3k_get_state(udev, &fw_state);
 	if (ret < 0) {
 		BT_ERR("Can't get state to change to load configuration err");
 		return -EBUSY;
 	}

 	ret = ath3k_get_version(udev, &fw_version);
 	if (ret < 0) {
 		BT_ERR("Can't get version to change to load ram patch err");
 		return ret;
 	}

 	switch (fw_version.ref_clock) {

 	case ATH3K_XTAL_FREQ_26M:
 		clk_value = 26;
 		break;
 	case ATH3K_XTAL_FREQ_40M:
 		clk_value = 40;
 		break;
 	case ATH3K_XTAL_FREQ_19P2:
 		clk_value = 19;
 		break;
 	default:
 		clk_value = 0;
 		break;
 	}

 	snprintf(filename, ATH3K_NAME_LEN, "ar3k/ramps_0x%08x_%d%s",
 		le32_to_cpu(fw_version.rom_version), clk_value, ".dfu");

 	ret = request_firmware(&firmware, filename, &udev->dev);
 	if (ret < 0) {
 		BT_ERR("Configuration file not found %s", filename);
 		return ret;
 	}

 	ret = ath3k_load_fwfile(udev, firmware);
 	release_firmware(firmware);

 	return ret;
 }

 static int ath3k_probe(struct usb_interface *intf,
 			const struct usb_device_id *id)
 {
 	const struct firmware *firmware;
 	struct usb_device *udev = interface_to_usbdev(intf);
 	int ret;

 	BT_DBG("intf %p id %p", intf, id);

 	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
 		return -ENODEV;

 	/* match device ID in ath3k blacklist table */
 	if (!id->driver_info) {
 		const struct usb_device_id *match;

 		match = usb_match_id(intf, ath3k_blist_tbl);
 		if (match)
 			id = match;
 	}

 	/* load patch and sysconfig files for AR3012 */
 	if (id->driver_info & BTUSB_ATH3012) {
 		/* New firmware with patch and sysconfig files already loaded */
 		if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x0001)
 			return -ENODEV;

 		ret = ath3k_load_patch(udev);
 		if (ret < 0) {
 			BT_ERR("Loading patch file failed");
 			return ret;
 		}
 		ret = ath3k_load_syscfg(udev);
 		if (ret < 0) {
 			BT_ERR("Loading sysconfig file failed");
 			return ret;
 		}
 		ret = ath3k_set_normal_mode(udev);
 		if (ret < 0) {
 			BT_ERR("Set normal mode failed");
 			return ret;
 		}
 		ath3k_switch_pid(udev);
 		return 0;
 	}

 	ret = request_firmware(&firmware, ATH3K_FIRMWARE, &udev->dev);
 	if (ret < 0) {
 		if (ret == -ENOENT)
 			BT_ERR("Firmware file \"%s\" not found",
 							ATH3K_FIRMWARE);
 		else
 			BT_ERR("Firmware file \"%s\" request failed (err=%d)",
 							ATH3K_FIRMWARE, ret);
 		return ret;
 	}

 	ret = ath3k_load_firmware(udev, firmware);
 	release_firmware(firmware);

 	return ret;
 }

 static void ath3k_disconnect(struct usb_interface *intf)
 {
 	BT_DBG("%s intf %p", __func__, intf);
 }

 static struct usb_driver ath3k_driver = {
 	.name		= "ath3k",
 	.probe		= ath3k_probe,
 	.disconnect	= ath3k_disconnect,
 	.id_table	= ath3k_table,
 	.disable_hub_initiated_lpm = 1,
 };

 module_usb_driver(ath3k_driver);

 MODULE_AUTHOR("Atheros Communications");
 MODULE_DESCRIPTION("Atheros AR30xx firmware driver");
 MODULE_VERSION(VERSION);
 MODULE_LICENSE("GPL");
 MODULE_FIRMWARE(ATH3K_FIRMWARE);
	// SPDX-License-Identifier: GPL-2.0-or-later
	/*
	* Copyright (c) 2008-2009 Atheros Communications Inc.
	*/


	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/init.h>
	#include <linux/slab.h>
	#include <linux/types.h>
	#include <linux/errno.h>
	#include <linux/device.h>
	#include <linux/firmware.h>
	#include <linux/usb.h>
	#include <asm/unaligned.h>
	#include <net/bluetooth/bluetooth.h>

	#define VERSION "1.0"
	#define ATH3K_FIRMWARE "ath3k-1.fw"

	#define ATH3K_DNLOAD 0x01
	#define ATH3K_GETSTATE 0x05
	#define ATH3K_SET_NORMAL_MODE 0x07
	#define ATH3K_GETVERSION 0x09
	#define USB_REG_SWITCH_VID_PID 0x0a

	#define ATH3K_MODE_MASK 0x3F
	#define ATH3K_NORMAL_MODE 0x0E

	#define ATH3K_PATCH_UPDATE 0x80
	#define ATH3K_SYSCFG_UPDATE 0x40

	#define ATH3K_XTAL_FREQ_26M 0x00
	#define ATH3K_XTAL_FREQ_40M 0x01
	#define ATH3K_XTAL_FREQ_19P2 0x02
	#define ATH3K_NAME_LEN 0xFF

	struct ath3k_version {
	__le32 rom_version;
	__le32 build_version;
	__le32 ram_version;
	__u8 ref_clock;
	__u8 reserved[7];
	} __packed;

	static const struct usb_device_id ath3k_table[] = {
	/* Atheros AR3011 */
	{ USB_DEVICE(0x0CF3, 0x3000) },

	/* Atheros AR3011 with sflash firmware*/
	{ USB_DEVICE(0x0489, 0xE027) },
	{ USB_DEVICE(0x0489, 0xE03D) },
	{ USB_DEVICE(0x04F2, 0xAFF1) },
	{ USB_DEVICE(0x0930, 0x0215) },
	{ USB_DEVICE(0x0CF3, 0x3002) },
	{ USB_DEVICE(0x0CF3, 0xE019) },
	{ USB_DEVICE(0x13d3, 0x3304) },

	/* Atheros AR9285 Malbec with sflash firmware */
	{ USB_DEVICE(0x03F0, 0x311D) },

	/* Atheros AR3012 with sflash firmware*/
	{ USB_DEVICE(0x0489, 0xe04d) },
	{ USB_DEVICE(0x0489, 0xe04e) },
	{ USB_DEVICE(0x0489, 0xe057) },
	{ USB_DEVICE(0x0489, 0xe056) },
	{ USB_DEVICE(0x0489, 0xe05f) },
	{ USB_DEVICE(0x0489, 0xe076) },
	{ USB_DEVICE(0x0489, 0xe078) },
	{ USB_DEVICE(0x0489, 0xe095) },
	{ USB_DEVICE(0x04c5, 0x1330) },
	{ USB_DEVICE(0x04CA, 0x3004) },
	{ USB_DEVICE(0x04CA, 0x3005) },
	{ USB_DEVICE(0x04CA, 0x3006) },
	{ USB_DEVICE(0x04CA, 0x3007) },
	{ USB_DEVICE(0x04CA, 0x3008) },
	{ USB_DEVICE(0x04CA, 0x300b) },
	{ USB_DEVICE(0x04CA, 0x300d) },
	{ USB_DEVICE(0x04CA, 0x300f) },
	{ USB_DEVICE(0x04CA, 0x3010) },
	{ USB_DEVICE(0x04CA, 0x3014) },
	{ USB_DEVICE(0x04CA, 0x3018) },
	{ USB_DEVICE(0x0930, 0x0219) },
	{ USB_DEVICE(0x0930, 0x021c) },
	{ USB_DEVICE(0x0930, 0x0220) },
	{ USB_DEVICE(0x0930, 0x0227) },
	{ USB_DEVICE(0x0b05, 0x17d0) },
	{ USB_DEVICE(0x0CF3, 0x0036) },
	{ USB_DEVICE(0x0CF3, 0x3004) },
	{ USB_DEVICE(0x0CF3, 0x3008) },
	{ USB_DEVICE(0x0CF3, 0x311D) },
	{ USB_DEVICE(0x0CF3, 0x311E) },
	{ USB_DEVICE(0x0CF3, 0x311F) },
	{ USB_DEVICE(0x0cf3, 0x3121) },
	{ USB_DEVICE(0x0CF3, 0x817a) },
	{ USB_DEVICE(0x0CF3, 0x817b) },
	{ USB_DEVICE(0x0cf3, 0xe003) },
	{ USB_DEVICE(0x0CF3, 0xE004) },
	{ USB_DEVICE(0x0CF3, 0xE005) },
	{ USB_DEVICE(0x0CF3, 0xE006) },
	{ USB_DEVICE(0x13d3, 0x3362) },
	{ USB_DEVICE(0x13d3, 0x3375) },
	{ USB_DEVICE(0x13d3, 0x3393) },
	{ USB_DEVICE(0x13d3, 0x3395) },
	{ USB_DEVICE(0x13d3, 0x3402) },
	{ USB_DEVICE(0x13d3, 0x3408) },
	{ USB_DEVICE(0x13d3, 0x3423) },
	{ USB_DEVICE(0x13d3, 0x3432) },
	{ USB_DEVICE(0x13d3, 0x3472) },
	{ USB_DEVICE(0x13d3, 0x3474) },
	{ USB_DEVICE(0x13d3, 0x3487) },
	{ USB_DEVICE(0x13d3, 0x3490) },

	/* Atheros AR5BBU12 with sflash firmware */
	{ USB_DEVICE(0x0489, 0xE02C) },

	/* Atheros AR5BBU22 with sflash firmware */
	{ USB_DEVICE(0x0489, 0xE036) },
	{ USB_DEVICE(0x0489, 0xE03C) },

	{ } /* Terminating entry */
	};

	MODULE_DEVICE_TABLE(usb, ath3k_table);

	#define BTUSB_ATH3012 0x80
	/* This table is to load patch and sysconfig files
	* for AR3012
	*/
	static const struct usb_device_id ath3k_blist_tbl[] = {

	/* Atheros AR3012 with sflash firmware*/
	{ USB_DEVICE(0x0489, 0xe04e), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0489, 0xe04d), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0489, 0xe056), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0489, 0xe057), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0489, 0xe05f), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0489, 0xe076), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0489, 0xe078), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0489, 0xe095), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x04c5, 0x1330), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x04ca, 0x3004), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x04ca, 0x3005), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x04ca, 0x3006), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x04ca, 0x3007), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x04ca, 0x3008), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x04ca, 0x300b), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x04ca, 0x300d), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x04ca, 0x300f), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x04ca, 0x3010), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x04ca, 0x3014), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x04ca, 0x3018), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0930, 0x0219), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0930, 0x021c), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0930, 0x0220), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0930, 0x0227), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0b05, 0x17d0), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0CF3, 0x0036), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0cf3, 0x3008), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0cf3, 0x311D), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0cf3, 0x311E), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0cf3, 0x311F), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0cf3, 0x3121), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0CF3, 0x817a), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0CF3, 0x817b), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0cf3, 0xe004), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0cf3, 0xe005), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0cf3, 0xe006), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0cf3, 0xe003), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x13d3, 0x3362), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x13d3, 0x3375), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x13d3, 0x3393), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x13d3, 0x3395), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x13d3, 0x3402), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x13d3, 0x3408), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x13d3, 0x3423), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x13d3, 0x3432), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x13d3, 0x3472), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x13d3, 0x3474), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x13d3, 0x3487), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x13d3, 0x3490), .driver_info = BTUSB_ATH3012 },

	/* Atheros AR5BBU22 with sflash firmware */
	{ USB_DEVICE(0x0489, 0xE036), .driver_info = BTUSB_ATH3012 },
	{ USB_DEVICE(0x0489, 0xE03C), .driver_info = BTUSB_ATH3012 },

	{ } /* Terminating entry */
	};

	static inline void ath3k_log_failed_loading(int err, int len, int size,
	int count)
	{
	BT_ERR("Firmware loading err = %d, len = %d, size = %d, count = %d",
	err, len, size, count);
	}

	#define USB_REQ_DFU_DNLOAD 1
	#define BULK_SIZE 4096
	#define FW_HDR_SIZE 20
	#define TIMEGAP_USEC_MIN 50
	#define TIMEGAP_USEC_MAX 100

	static int ath3k_load_firmware(struct usb_device *udev,
	const struct firmware *firmware)
	{
	u8 *send_buf;
	int len = 0;
	int err, pipe, size, sent = 0;
	int count = firmware->size;

	BT_DBG("udev %p", udev);

	pipe = usb_sndctrlpipe(udev, 0);

	send_buf = kmalloc(BULK_SIZE, GFP_KERNEL);
	if (!send_buf) {
	BT_ERR("Can't allocate memory chunk for firmware");
	return -ENOMEM;
	}

	memcpy(send_buf, firmware->data, FW_HDR_SIZE);
	err = usb_control_msg(udev, pipe, USB_REQ_DFU_DNLOAD, USB_TYPE_VENDOR,
	0, 0, send_buf, FW_HDR_SIZE,
	USB_CTRL_SET_TIMEOUT);
	if (err < 0) {
	BT_ERR("Can't change to loading configuration err");
	goto error;
	}
	sent += FW_HDR_SIZE;
	count -= FW_HDR_SIZE;

	pipe = usb_sndbulkpipe(udev, 0x02);

	while (count) {
	/* workaround the compatibility issue with xHCI controller*/
	usleep_range(TIMEGAP_USEC_MIN, TIMEGAP_USEC_MAX);

	size = min_t(uint, count, BULK_SIZE);
	memcpy(send_buf, firmware->data + sent, size);

	err = usb_bulk_msg(udev, pipe, send_buf, size,
	&len, 3000);

	if (err \|\| (len != size)) {
	ath3k_log_failed_loading(err, len, size, count);
	goto error;
	}

	sent += size;
	count -= size;
	}

	error:
	kfree(send_buf);
	return err;
	}

	static int ath3k_get_state(struct usb_device udev, unsigned char state)
	{
	int ret, pipe = 0;
	char *buf;

	buf = kmalloc(sizeof(*buf), GFP_KERNEL);
	if (!buf)
	return -ENOMEM;

	pipe = usb_rcvctrlpipe(udev, 0);
	ret = usb_control_msg(udev, pipe, ATH3K_GETSTATE,
	USB_TYPE_VENDOR \| USB_DIR_IN, 0, 0,
	buf, sizeof(*buf), USB_CTRL_SET_TIMEOUT);

	state = buf;
	kfree(buf);

	return ret;
	}

	static int ath3k_get_version(struct usb_device *udev,
	struct ath3k_version *version)
	{
	int ret, pipe = 0;
	struct ath3k_version *buf;
	const int size = sizeof(*buf);

	buf = kmalloc(size, GFP_KERNEL);
	if (!buf)
	return -ENOMEM;

	pipe = usb_rcvctrlpipe(udev, 0);
	ret = usb_control_msg(udev, pipe, ATH3K_GETVERSION,
	USB_TYPE_VENDOR \| USB_DIR_IN, 0, 0,
	buf, size, USB_CTRL_SET_TIMEOUT);

	memcpy(version, buf, size);
	kfree(buf);

	return ret;
	}

	static int ath3k_load_fwfile(struct usb_device *udev,
	const struct firmware *firmware)
	{
	u8 *send_buf;
	int len = 0;
	int err, pipe, size, count, sent = 0;
	int ret;

	count = firmware->size;

	send_buf = kmalloc(BULK_SIZE, GFP_KERNEL);
	if (!send_buf) {
	BT_ERR("Can't allocate memory chunk for firmware");
	return -ENOMEM;
	}

	size = min_t(uint, count, FW_HDR_SIZE);
	memcpy(send_buf, firmware->data, size);

	pipe = usb_sndctrlpipe(udev, 0);
	ret = usb_control_msg(udev, pipe, ATH3K_DNLOAD,
	USB_TYPE_VENDOR, 0, 0, send_buf,
	size, USB_CTRL_SET_TIMEOUT);
	if (ret < 0) {
	BT_ERR("Can't change to loading configuration err");
	kfree(send_buf);
	return ret;
	}

	sent += size;
	count -= size;

	pipe = usb_sndbulkpipe(udev, 0x02);

	while (count) {
	/* workaround the compatibility issue with xHCI controller*/
	usleep_range(TIMEGAP_USEC_MIN, TIMEGAP_USEC_MAX);

	size = min_t(uint, count, BULK_SIZE);
	memcpy(send_buf, firmware->data + sent, size);

	err = usb_bulk_msg(udev, pipe, send_buf, size,
	&len, 3000);
	if (err \|\| (len != size)) {
	ath3k_log_failed_loading(err, len, size, count);
	kfree(send_buf);
	return err;
	}
	sent += size;
	count -= size;
	}

	kfree(send_buf);
	return 0;
	}

	static int ath3k_switch_pid(struct usb_device *udev)
	{
	int pipe = 0;

	pipe = usb_sndctrlpipe(udev, 0);
	return usb_control_msg(udev, pipe, USB_REG_SWITCH_VID_PID,
	USB_TYPE_VENDOR, 0, 0,
	NULL, 0, USB_CTRL_SET_TIMEOUT);
	}

	static int ath3k_set_normal_mode(struct usb_device *udev)
	{
	unsigned char fw_state;
	int pipe = 0, ret;

	ret = ath3k_get_state(udev, &fw_state);
	if (ret < 0) {
	BT_ERR("Can't get state to change to normal mode err");
	return ret;
	}

	if ((fw_state & ATH3K_MODE_MASK) == ATH3K_NORMAL_MODE) {
	BT_DBG("firmware was already in normal mode");
	return 0;
	}

	pipe = usb_sndctrlpipe(udev, 0);
	return usb_control_msg(udev, pipe, ATH3K_SET_NORMAL_MODE,
	USB_TYPE_VENDOR, 0, 0,
	NULL, 0, USB_CTRL_SET_TIMEOUT);
	}

	static int ath3k_load_patch(struct usb_device *udev)
	{
	unsigned char fw_state;
	char filename[ATH3K_NAME_LEN];
	const struct firmware *firmware;
	struct ath3k_version fw_version;
	__u32 pt_rom_version, pt_build_version;
	int ret;

	ret = ath3k_get_state(udev, &fw_state);
	if (ret < 0) {
	BT_ERR("Can't get state to change to load ram patch err");
	return ret;
	}

	if (fw_state & ATH3K_PATCH_UPDATE) {
	BT_DBG("Patch was already downloaded");
	return 0;
	}

	ret = ath3k_get_version(udev, &fw_version);
	if (ret < 0) {
	BT_ERR("Can't get version to change to load ram patch err");
	return ret;
	}

	snprintf(filename, ATH3K_NAME_LEN, "ar3k/AthrBT_0x%08x.dfu",
	le32_to_cpu(fw_version.rom_version));

	ret = request_firmware(&firmware, filename, &udev->dev);
	if (ret < 0) {
	BT_ERR("Patch file not found %s", filename);
	return ret;
	}

	pt_rom_version = get_unaligned_le32(firmware->data +
	firmware->size - 8);
	pt_build_version = get_unaligned_le32(firmware->data +
	firmware->size - 4);

	if (pt_rom_version != le32_to_cpu(fw_version.rom_version) \|\|
	pt_build_version <= le32_to_cpu(fw_version.build_version)) {
	BT_ERR("Patch file version did not match with firmware");
	release_firmware(firmware);
	return -EINVAL;
	}

	ret = ath3k_load_fwfile(udev, firmware);
	release_firmware(firmware);

	return ret;
	}

	static int ath3k_load_syscfg(struct usb_device *udev)
	{
	unsigned char fw_state;
	char filename[ATH3K_NAME_LEN];
	const struct firmware *firmware;
	struct ath3k_version fw_version;
	int clk_value, ret;

	ret = ath3k_get_state(udev, &fw_state);
	if (ret < 0) {
	BT_ERR("Can't get state to change to load configuration err");
	return -EBUSY;
	}

	ret = ath3k_get_version(udev, &fw_version);
	if (ret < 0) {
	BT_ERR("Can't get version to change to load ram patch err");
	return ret;
	}

	switch (fw_version.ref_clock) {

	case ATH3K_XTAL_FREQ_26M:
	clk_value = 26;
	break;
	case ATH3K_XTAL_FREQ_40M:
	clk_value = 40;
	break;
	case ATH3K_XTAL_FREQ_19P2:
	clk_value = 19;
	break;
	default:
	clk_value = 0;
	break;
	}

	snprintf(filename, ATH3K_NAME_LEN, "ar3k/ramps_0x%08x_%d%s",
	le32_to_cpu(fw_version.rom_version), clk_value, ".dfu");

	ret = request_firmware(&firmware, filename, &udev->dev);
	if (ret < 0) {
	BT_ERR("Configuration file not found %s", filename);
	return ret;
	}

	ret = ath3k_load_fwfile(udev, firmware);
	release_firmware(firmware);

	return ret;
	}

	static int ath3k_probe(struct usb_interface *intf,
	const struct usb_device_id *id)
	{
	const struct firmware *firmware;
	struct usb_device *udev = interface_to_usbdev(intf);
	int ret;

	BT_DBG("intf %p id %p", intf, id);

	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
	return -ENODEV;

	/* match device ID in ath3k blacklist table */
	if (!id->driver_info) {
	const struct usb_device_id *match;

	match = usb_match_id(intf, ath3k_blist_tbl);
	if (match)
	id = match;
	}

	/* load patch and sysconfig files for AR3012 */
	if (id->driver_info & BTUSB_ATH3012) {
	/* New firmware with patch and sysconfig files already loaded */
	if (le16_to_cpu(udev->descriptor.bcdDevice) > 0x0001)
	return -ENODEV;

	ret = ath3k_load_patch(udev);
	if (ret < 0) {
	BT_ERR("Loading patch file failed");
	return ret;
	}
	ret = ath3k_load_syscfg(udev);
	if (ret < 0) {
	BT_ERR("Loading sysconfig file failed");
	return ret;
	}
	ret = ath3k_set_normal_mode(udev);
	if (ret < 0) {
	BT_ERR("Set normal mode failed");
	return ret;
	}
	ath3k_switch_pid(udev);
	return 0;
	}

	ret = request_firmware(&firmware, ATH3K_FIRMWARE, &udev->dev);
	if (ret < 0) {
	if (ret == -ENOENT)
	BT_ERR("Firmware file \"%s\" not found",
	ATH3K_FIRMWARE);
	else
	BT_ERR("Firmware file \"%s\" request failed (err=%d)",
	ATH3K_FIRMWARE, ret);
	return ret;
	}

	ret = ath3k_load_firmware(udev, firmware);
	release_firmware(firmware);

	return ret;
	}

	static void ath3k_disconnect(struct usb_interface *intf)
	{
	BT_DBG("%s intf %p", __func__, intf);
	}

	static struct usb_driver ath3k_driver = {
	.name = "ath3k",
	.probe = ath3k_probe,
	.disconnect = ath3k_disconnect,
	.id_table = ath3k_table,
	.disable_hub_initiated_lpm = 1,
	};

	module_usb_driver(ath3k_driver);

	MODULE_AUTHOR("Atheros Communications");
	MODULE_DESCRIPTION("Atheros AR30xx firmware driver");
	MODULE_VERSION(VERSION);
	MODULE_LICENSE("GPL");
	MODULE_FIRMWARE(ATH3K_FIRMWARE);