drivers/bluetooth/btbcm.c - third_party/kernel - Git at Google

 /*
  *
  *  Bluetooth support for Broadcom devices
  *
  *  Copyright (C) 2015  Intel Corporation
  *
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  *
  */

 #include <linux/module.h>
 #include <linux/firmware.h>
 #include <asm/unaligned.h>

 #include <net/bluetooth/bluetooth.h>
 #include <net/bluetooth/hci_core.h>

 #include "btbcm.h"

 #define VERSION "0.1"

 #define BDADDR_BCM20702A0 (&(bdaddr_t) {{0x00, 0xa0, 0x02, 0x70, 0x20, 0x00}})
 #define BDADDR_BCM4324B3 (&(bdaddr_t) {{0x00, 0x00, 0x00, 0xb3, 0x24, 0x43}})
 #define BDADDR_BCM4330B1 (&(bdaddr_t) {{0x00, 0x00, 0x00, 0xb1, 0x30, 0x43}})

 int btbcm_check_bdaddr(struct hci_dev *hdev)
 {
 	struct hci_rp_read_bd_addr *bda;
 	struct sk_buff *skb;

 	skb = __hci_cmd_sync(hdev, HCI_OP_READ_BD_ADDR, 0, NULL,
 			     HCI_INIT_TIMEOUT);
 	if (IS_ERR(skb)) {
 		int err = PTR_ERR(skb);
 		bt_dev_err(hdev, "BCM: Reading device address failed (%d)", err);
 		return err;
 	}

 	if (skb->len != sizeof(*bda)) {
 		bt_dev_err(hdev, "BCM: Device address length mismatch");
 		kfree_skb(skb);
 		return -EIO;
 	}

 	bda = (struct hci_rp_read_bd_addr *)skb->data;

 	/* Check if the address indicates a controller with either an
 	 * invalid or default address. In both cases the device needs
 	 * to be marked as not having a valid address.
 	 *
 	 * The address 00:20:70:02:A0:00 indicates a BCM20702A0 controller
 	 * with no configured address.
 	 *
 	 * The address 43:24:B3:00:00:00 indicates a BCM4324B3 controller
 	 * with waiting for configuration state.
 	 *
 	 * The address 43:30:B1:00:00:00 indicates a BCM4330B1 controller
 	 * with waiting for configuration state.
 	 */
 	if (!bacmp(&bda->bdaddr, BDADDR_BCM20702A0) ||
 	    !bacmp(&bda->bdaddr, BDADDR_BCM4324B3) ||
 	    !bacmp(&bda->bdaddr, BDADDR_BCM4330B1)) {
 		bt_dev_info(hdev, "BCM: Using default device address (%pMR)",
 			    &bda->bdaddr);
 		set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
 	}

 	kfree_skb(skb);

 	return 0;
 }
 EXPORT_SYMBOL_GPL(btbcm_check_bdaddr);

 int btbcm_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr)
 {
 	struct sk_buff *skb;
 	int err;

 	skb = __hci_cmd_sync(hdev, 0xfc01, 6, bdaddr, HCI_INIT_TIMEOUT);
 	if (IS_ERR(skb)) {
 		err = PTR_ERR(skb);
 		bt_dev_err(hdev, "BCM: Change address command failed (%d)", err);
 		return err;
 	}
 	kfree_skb(skb);

 	return 0;
 }
 EXPORT_SYMBOL_GPL(btbcm_set_bdaddr);

 int btbcm_patchram(struct hci_dev *hdev, const struct firmware *fw)
 {
 	const struct hci_command_hdr *cmd;
 	const u8 *fw_ptr;
 	size_t fw_size;
 	struct sk_buff *skb;
 	u16 opcode;
 	int err = 0;

 	/* Start Download */
 	skb = __hci_cmd_sync(hdev, 0xfc2e, 0, NULL, HCI_INIT_TIMEOUT);
 	if (IS_ERR(skb)) {
 		err = PTR_ERR(skb);
 		bt_dev_err(hdev, "BCM: Download Minidrv command failed (%d)",
 			   err);
 		goto done;
 	}
 	kfree_skb(skb);

 	/* 50 msec delay after Download Minidrv completes */
 	msleep(50);

 	fw_ptr = fw->data;
 	fw_size = fw->size;

 	while (fw_size >= sizeof(*cmd)) {
 		const u8 *cmd_param;

 		cmd = (struct hci_command_hdr *)fw_ptr;
 		fw_ptr += sizeof(*cmd);
 		fw_size -= sizeof(*cmd);

 		if (fw_size < cmd->plen) {
 			bt_dev_err(hdev, "BCM: Patch is corrupted");
 			err = -EINVAL;
 			goto done;
 		}

 		cmd_param = fw_ptr;
 		fw_ptr += cmd->plen;
 		fw_size -= cmd->plen;

 		opcode = le16_to_cpu(cmd->opcode);

 		skb = __hci_cmd_sync(hdev, opcode, cmd->plen, cmd_param,
 				     HCI_INIT_TIMEOUT);
 		if (IS_ERR(skb)) {
 			err = PTR_ERR(skb);
 			bt_dev_err(hdev, "BCM: Patch command %04x failed (%d)",
 				   opcode, err);
 			goto done;
 		}
 		kfree_skb(skb);
 	}

 	/* 250 msec delay after Launch Ram completes */
 	msleep(250);

 done:
 	return err;
 }
 EXPORT_SYMBOL(btbcm_patchram);

 static int btbcm_reset(struct hci_dev *hdev)
 {
 	struct sk_buff *skb;

 	skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
 	if (IS_ERR(skb)) {
 		int err = PTR_ERR(skb);
 		bt_dev_err(hdev, "BCM: Reset failed (%d)", err);
 		return err;
 	}
 	kfree_skb(skb);

 	/* 100 msec delay for module to complete reset process */
 	msleep(100);

 	return 0;
 }

 static struct sk_buff *btbcm_read_local_name(struct hci_dev *hdev)
 {
 	struct sk_buff *skb;

 	skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL,
 			     HCI_INIT_TIMEOUT);
 	if (IS_ERR(skb)) {
 		bt_dev_err(hdev, "BCM: Reading local name failed (%ld)",
 			   PTR_ERR(skb));
 		return skb;
 	}

 	if (skb->len != sizeof(struct hci_rp_read_local_name)) {
 		bt_dev_err(hdev, "BCM: Local name length mismatch");
 		kfree_skb(skb);
 		return ERR_PTR(-EIO);
 	}

 	return skb;
 }

 static struct sk_buff *btbcm_read_local_version(struct hci_dev *hdev)
 {
 	struct sk_buff *skb;

 	skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
 			     HCI_INIT_TIMEOUT);
 	if (IS_ERR(skb)) {
 		bt_dev_err(hdev, "BCM: Reading local version info failed (%ld)",
 			   PTR_ERR(skb));
 		return skb;
 	}

 	if (skb->len != sizeof(struct hci_rp_read_local_version)) {
 		bt_dev_err(hdev, "BCM: Local version length mismatch");
 		kfree_skb(skb);
 		return ERR_PTR(-EIO);
 	}

 	return skb;
 }

 static struct sk_buff *btbcm_read_verbose_config(struct hci_dev *hdev)
 {
 	struct sk_buff *skb;

 	skb = __hci_cmd_sync(hdev, 0xfc79, 0, NULL, HCI_INIT_TIMEOUT);
 	if (IS_ERR(skb)) {
 		bt_dev_err(hdev, "BCM: Read verbose config info failed (%ld)",
 			   PTR_ERR(skb));
 		return skb;
 	}

 	if (skb->len != 7) {
 		bt_dev_err(hdev, "BCM: Verbose config length mismatch");
 		kfree_skb(skb);
 		return ERR_PTR(-EIO);
 	}

 	return skb;
 }

 static struct sk_buff *btbcm_read_controller_features(struct hci_dev *hdev)
 {
 	struct sk_buff *skb;

 	skb = __hci_cmd_sync(hdev, 0xfc6e, 0, NULL, HCI_INIT_TIMEOUT);
 	if (IS_ERR(skb)) {
 		bt_dev_err(hdev, "BCM: Read controller features failed (%ld)",
 			   PTR_ERR(skb));
 		return skb;
 	}

 	if (skb->len != 9) {
 		bt_dev_err(hdev, "BCM: Controller features length mismatch");
 		kfree_skb(skb);
 		return ERR_PTR(-EIO);
 	}

 	return skb;
 }

 static struct sk_buff *btbcm_read_usb_product(struct hci_dev *hdev)
 {
 	struct sk_buff *skb;

 	skb = __hci_cmd_sync(hdev, 0xfc5a, 0, NULL, HCI_INIT_TIMEOUT);
 	if (IS_ERR(skb)) {
 		bt_dev_err(hdev, "BCM: Read USB product info failed (%ld)",
 			   PTR_ERR(skb));
 		return skb;
 	}

 	if (skb->len != 5) {
 		bt_dev_err(hdev, "BCM: USB product length mismatch");
 		kfree_skb(skb);
 		return ERR_PTR(-EIO);
 	}

 	return skb;
 }

 static int btbcm_read_info(struct hci_dev *hdev)
 {
 	struct sk_buff *skb;

 	/* Read Verbose Config Version Info */
 	skb = btbcm_read_verbose_config(hdev);
 	if (IS_ERR(skb))
 		return PTR_ERR(skb);

 	bt_dev_info(hdev, "BCM: chip id %u", skb->data[1]);
 	kfree_skb(skb);

 	/* Read Controller Features */
 	skb = btbcm_read_controller_features(hdev);
 	if (IS_ERR(skb))
 		return PTR_ERR(skb);

 	bt_dev_info(hdev, "BCM: features 0x%2.2x", skb->data[1]);
 	kfree_skb(skb);

 	/* Read Local Name */
 	skb = btbcm_read_local_name(hdev);
 	if (IS_ERR(skb))
 		return PTR_ERR(skb);

 	bt_dev_info(hdev, "%s", (char *)(skb->data + 1));
 	kfree_skb(skb);

 	return 0;
 }

 struct bcm_subver_table {
 	u16 subver;
 	const char *name;
 };

 static const struct bcm_subver_table bcm_uart_subver_table[] = {
 	{ 0x4103, "BCM4330B1"	},	/* 002.001.003 */
 	{ 0x410e, "BCM43341B0"	},	/* 002.001.014 */
 	{ 0x4406, "BCM4324B3"	},	/* 002.004.006 */
 	{ 0x4606, "BCM4324B5"	},	/* 002.006.006 */
 	{ 0x6109, "BCM4335C0"	},	/* 003.001.009 */
 	{ 0x610c, "BCM4354"	},	/* 003.001.012 */
 	{ 0x2122, "BCM4343A0"	},	/* 001.001.034 */
 	{ 0x2209, "BCM43430A1"  },	/* 001.002.009 */
 	{ 0x6119, "BCM4345C0"	},	/* 003.001.025 */
 	{ 0x230f, "BCM4356A2"	},	/* 001.003.015 */
 	{ }
 };

 static const struct bcm_subver_table bcm_usb_subver_table[] = {
 	{ 0x2105, "BCM20703A1"	},	/* 001.001.005 */
 	{ 0x210b, "BCM43142A0"	},	/* 001.001.011 */
 	{ 0x2112, "BCM4314A0"	},	/* 001.001.018 */
 	{ 0x2118, "BCM20702A0"	},	/* 001.001.024 */
 	{ 0x2126, "BCM4335A0"	},	/* 001.001.038 */
 	{ 0x220e, "BCM20702A1"	},	/* 001.002.014 */
 	{ 0x230f, "BCM4354A2"	},	/* 001.003.015 */
 	{ 0x4106, "BCM4335B0"	},	/* 002.001.006 */
 	{ 0x410e, "BCM20702B0"	},	/* 002.001.014 */
 	{ 0x6109, "BCM4335C0"	},	/* 003.001.009 */
 	{ 0x610c, "BCM4354"	},	/* 003.001.012 */
 	{ }
 };

 int btbcm_initialize(struct hci_dev *hdev, char *fw_name, size_t len,
 		     bool reinit)
 {
 	u16 subver, rev, pid, vid;
 	const char *hw_name = "BCM";
 	struct sk_buff *skb;
 	struct hci_rp_read_local_version *ver;
 	const struct bcm_subver_table *bcm_subver_table;
 	int i, err;

 	/* Reset */
 	err = btbcm_reset(hdev);
 	if (err)
 		return err;

 	/* Read Local Version Info */
 	skb = btbcm_read_local_version(hdev);
 	if (IS_ERR(skb))
 		return PTR_ERR(skb);

 	ver = (struct hci_rp_read_local_version *)skb->data;
 	rev = le16_to_cpu(ver->hci_rev);
 	subver = le16_to_cpu(ver->lmp_subver);
 	kfree_skb(skb);

 	/* Read controller information */
 	if (!reinit) {
 		err = btbcm_read_info(hdev);
 		if (err)
 			return err;
 	}

 	/* Upper nibble of rev should be between 0 and 3? */
 	if (((rev & 0xf000) >> 12) > 3)
 		return 0;

 	bcm_subver_table = (hdev->bus == HCI_USB) ? bcm_usb_subver_table :
 						    bcm_uart_subver_table;

 	for (i = 0; bcm_subver_table[i].name; i++) {
 		if (subver == bcm_subver_table[i].subver) {
 			hw_name = bcm_subver_table[i].name;
 			break;
 		}
 	}

 	if (hdev->bus == HCI_USB) {
 		/* Read USB Product Info */
 		skb = btbcm_read_usb_product(hdev);
 		if (IS_ERR(skb))
 			return PTR_ERR(skb);

 		vid = get_unaligned_le16(skb->data + 1);
 		pid = get_unaligned_le16(skb->data + 3);
 		kfree_skb(skb);

 		snprintf(fw_name, len, "brcm/%s-%4.4x-%4.4x.hcd",
 			 hw_name, vid, pid);
 	} else {
 		snprintf(fw_name, len, "brcm/%s.hcd", hw_name);
 	}

 	bt_dev_info(hdev, "%s (%3.3u.%3.3u.%3.3u) build %4.4u",
 		    hw_name, (subver & 0xe000) >> 13,
 		    (subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);

 	return 0;
 }
 EXPORT_SYMBOL_GPL(btbcm_initialize);

 int btbcm_finalize(struct hci_dev *hdev)
 {
 	char fw_name[64];
 	int err;

 	/* Re-initialize */
 	err = btbcm_initialize(hdev, fw_name, sizeof(fw_name), true);
 	if (err)
 		return err;

 	btbcm_check_bdaddr(hdev);

 	set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);

 	return 0;
 }
 EXPORT_SYMBOL_GPL(btbcm_finalize);

 int btbcm_setup_patchram(struct hci_dev *hdev)
 {
 	char fw_name[64];
 	const struct firmware *fw;
 	struct sk_buff *skb;
 	int err;

 	/* Initialize */
 	err = btbcm_initialize(hdev, fw_name, sizeof(fw_name), false);
 	if (err)
 		return err;

 	err = request_firmware(&fw, fw_name, &hdev->dev);
 	if (err < 0) {
 		bt_dev_info(hdev, "BCM: Patch %s not found", fw_name);
 		goto done;
 	}

 	btbcm_patchram(hdev, fw);

 	release_firmware(fw);

 	/* Re-initialize */
 	err = btbcm_initialize(hdev, fw_name, sizeof(fw_name), true);
 	if (err)
 		return err;

 	/* Read Local Name */
 	skb = btbcm_read_local_name(hdev);
 	if (IS_ERR(skb))
 		return PTR_ERR(skb);

 	bt_dev_info(hdev, "%s", (char *)(skb->data + 1));
 	kfree_skb(skb);

 done:
 	btbcm_check_bdaddr(hdev);

 	set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);

 	return 0;
 }
 EXPORT_SYMBOL_GPL(btbcm_setup_patchram);

 int btbcm_setup_apple(struct hci_dev *hdev)
 {
 	struct sk_buff *skb;
 	int err;

 	/* Reset */
 	err = btbcm_reset(hdev);
 	if (err)
 		return err;

 	/* Read Verbose Config Version Info */
 	skb = btbcm_read_verbose_config(hdev);
 	if (!IS_ERR(skb)) {
 		bt_dev_info(hdev, "BCM: chip id %u build %4.4u",
 			    skb->data[1], get_unaligned_le16(skb->data + 5));
 		kfree_skb(skb);
 	}

 	/* Read USB Product Info */
 	skb = btbcm_read_usb_product(hdev);
 	if (!IS_ERR(skb)) {
 		bt_dev_info(hdev, "BCM: product %4.4x:%4.4x",
 			    get_unaligned_le16(skb->data + 1),
 			    get_unaligned_le16(skb->data + 3));
 		kfree_skb(skb);
 	}

 	/* Read Controller Features */
 	skb = btbcm_read_controller_features(hdev);
 	if (!IS_ERR(skb)) {
 		bt_dev_info(hdev, "BCM: features 0x%2.2x", skb->data[1]);
 		kfree_skb(skb);
 	}

 	/* Read Local Name */
 	skb = btbcm_read_local_name(hdev);
 	if (!IS_ERR(skb)) {
 		bt_dev_info(hdev, "%s", (char *)(skb->data + 1));
 		kfree_skb(skb);
 	}

 	set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);

 	return 0;
 }
 EXPORT_SYMBOL_GPL(btbcm_setup_apple);

 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 MODULE_DESCRIPTION("Bluetooth support for Broadcom devices ver " VERSION);
 MODULE_VERSION(VERSION);
 MODULE_LICENSE("GPL");
	/*
	*
	* Bluetooth support for Broadcom devices
	*
	* Copyright (C) 2015 Intel Corporation
	*
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	*
	*/

	#include <linux/module.h>
	#include <linux/firmware.h>
	#include <asm/unaligned.h>

	#include <net/bluetooth/bluetooth.h>
	#include <net/bluetooth/hci_core.h>

	#include "btbcm.h"

	#define VERSION "0.1"

	#define BDADDR_BCM20702A0 (&(bdaddr_t) {{0x00, 0xa0, 0x02, 0x70, 0x20, 0x00}})
	#define BDADDR_BCM4324B3 (&(bdaddr_t) {{0x00, 0x00, 0x00, 0xb3, 0x24, 0x43}})
	#define BDADDR_BCM4330B1 (&(bdaddr_t) {{0x00, 0x00, 0x00, 0xb1, 0x30, 0x43}})

	int btbcm_check_bdaddr(struct hci_dev *hdev)
	{
	struct hci_rp_read_bd_addr *bda;
	struct sk_buff *skb;

	skb = __hci_cmd_sync(hdev, HCI_OP_READ_BD_ADDR, 0, NULL,
	HCI_INIT_TIMEOUT);
	if (IS_ERR(skb)) {
	int err = PTR_ERR(skb);
	bt_dev_err(hdev, "BCM: Reading device address failed (%d)", err);
	return err;
	}

	if (skb->len != sizeof(*bda)) {
	bt_dev_err(hdev, "BCM: Device address length mismatch");
	kfree_skb(skb);
	return -EIO;
	}

	bda = (struct hci_rp_read_bd_addr *)skb->data;

	/* Check if the address indicates a controller with either an
	* invalid or default address. In both cases the device needs
	* to be marked as not having a valid address.
	*
	* The address 00:20:70:02:A0:00 indicates a BCM20702A0 controller
	* with no configured address.
	*
	* The address 43:24:B3:00:00:00 indicates a BCM4324B3 controller
	* with waiting for configuration state.
	*
	* The address 43:30:B1:00:00:00 indicates a BCM4330B1 controller
	* with waiting for configuration state.
	*/
	if (!bacmp(&bda->bdaddr, BDADDR_BCM20702A0) \|\|
	!bacmp(&bda->bdaddr, BDADDR_BCM4324B3) \|\|
	!bacmp(&bda->bdaddr, BDADDR_BCM4330B1)) {
	bt_dev_info(hdev, "BCM: Using default device address (%pMR)",
	&bda->bdaddr);
	set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
	}

	kfree_skb(skb);

	return 0;
	}
	EXPORT_SYMBOL_GPL(btbcm_check_bdaddr);

	int btbcm_set_bdaddr(struct hci_dev hdev, const bdaddr_t bdaddr)
	{
	struct sk_buff *skb;
	int err;

	skb = __hci_cmd_sync(hdev, 0xfc01, 6, bdaddr, HCI_INIT_TIMEOUT);
	if (IS_ERR(skb)) {
	err = PTR_ERR(skb);
	bt_dev_err(hdev, "BCM: Change address command failed (%d)", err);
	return err;
	}
	kfree_skb(skb);

	return 0;
	}
	EXPORT_SYMBOL_GPL(btbcm_set_bdaddr);

	int btbcm_patchram(struct hci_dev hdev, const struct firmware fw)
	{
	const struct hci_command_hdr *cmd;
	const u8 *fw_ptr;
	size_t fw_size;
	struct sk_buff *skb;
	u16 opcode;
	int err = 0;

	/* Start Download */
	skb = __hci_cmd_sync(hdev, 0xfc2e, 0, NULL, HCI_INIT_TIMEOUT);
	if (IS_ERR(skb)) {
	err = PTR_ERR(skb);
	bt_dev_err(hdev, "BCM: Download Minidrv command failed (%d)",
	err);
	goto done;
	}
	kfree_skb(skb);

	/* 50 msec delay after Download Minidrv completes */
	msleep(50);

	fw_ptr = fw->data;
	fw_size = fw->size;

	while (fw_size >= sizeof(*cmd)) {
	const u8 *cmd_param;

	cmd = (struct hci_command_hdr *)fw_ptr;
	fw_ptr += sizeof(*cmd);
	fw_size -= sizeof(*cmd);

	if (fw_size < cmd->plen) {
	bt_dev_err(hdev, "BCM: Patch is corrupted");
	err = -EINVAL;
	goto done;
	}

	cmd_param = fw_ptr;
	fw_ptr += cmd->plen;
	fw_size -= cmd->plen;

	opcode = le16_to_cpu(cmd->opcode);

	skb = __hci_cmd_sync(hdev, opcode, cmd->plen, cmd_param,
	HCI_INIT_TIMEOUT);
	if (IS_ERR(skb)) {
	err = PTR_ERR(skb);
	bt_dev_err(hdev, "BCM: Patch command %04x failed (%d)",
	opcode, err);
	goto done;
	}
	kfree_skb(skb);
	}

	/* 250 msec delay after Launch Ram completes */
	msleep(250);

	done:
	return err;
	}
	EXPORT_SYMBOL(btbcm_patchram);

	static int btbcm_reset(struct hci_dev *hdev)
	{
	struct sk_buff *skb;

	skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT);
	if (IS_ERR(skb)) {
	int err = PTR_ERR(skb);
	bt_dev_err(hdev, "BCM: Reset failed (%d)", err);
	return err;
	}
	kfree_skb(skb);

	/* 100 msec delay for module to complete reset process */
	msleep(100);

	return 0;
	}

	static struct sk_buff btbcm_read_local_name(struct hci_dev hdev)
	{
	struct sk_buff *skb;

	skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL,
	HCI_INIT_TIMEOUT);
	if (IS_ERR(skb)) {
	bt_dev_err(hdev, "BCM: Reading local name failed (%ld)",
	PTR_ERR(skb));
	return skb;
	}

	if (skb->len != sizeof(struct hci_rp_read_local_name)) {
	bt_dev_err(hdev, "BCM: Local name length mismatch");
	kfree_skb(skb);
	return ERR_PTR(-EIO);
	}

	return skb;
	}

	static struct sk_buff btbcm_read_local_version(struct hci_dev hdev)
	{
	struct sk_buff *skb;

	skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL,
	HCI_INIT_TIMEOUT);
	if (IS_ERR(skb)) {
	bt_dev_err(hdev, "BCM: Reading local version info failed (%ld)",
	PTR_ERR(skb));
	return skb;
	}

	if (skb->len != sizeof(struct hci_rp_read_local_version)) {
	bt_dev_err(hdev, "BCM: Local version length mismatch");
	kfree_skb(skb);
	return ERR_PTR(-EIO);
	}

	return skb;
	}

	static struct sk_buff btbcm_read_verbose_config(struct hci_dev hdev)
	{
	struct sk_buff *skb;

	skb = __hci_cmd_sync(hdev, 0xfc79, 0, NULL, HCI_INIT_TIMEOUT);
	if (IS_ERR(skb)) {
	bt_dev_err(hdev, "BCM: Read verbose config info failed (%ld)",
	PTR_ERR(skb));
	return skb;
	}

	if (skb->len != 7) {
	bt_dev_err(hdev, "BCM: Verbose config length mismatch");
	kfree_skb(skb);
	return ERR_PTR(-EIO);
	}

	return skb;
	}

	static struct sk_buff btbcm_read_controller_features(struct hci_dev hdev)
	{
	struct sk_buff *skb;

	skb = __hci_cmd_sync(hdev, 0xfc6e, 0, NULL, HCI_INIT_TIMEOUT);
	if (IS_ERR(skb)) {
	bt_dev_err(hdev, "BCM: Read controller features failed (%ld)",
	PTR_ERR(skb));
	return skb;
	}

	if (skb->len != 9) {
	bt_dev_err(hdev, "BCM: Controller features length mismatch");
	kfree_skb(skb);
	return ERR_PTR(-EIO);
	}

	return skb;
	}

	static struct sk_buff btbcm_read_usb_product(struct hci_dev hdev)
	{
	struct sk_buff *skb;

	skb = __hci_cmd_sync(hdev, 0xfc5a, 0, NULL, HCI_INIT_TIMEOUT);
	if (IS_ERR(skb)) {
	bt_dev_err(hdev, "BCM: Read USB product info failed (%ld)",
	PTR_ERR(skb));
	return skb;
	}

	if (skb->len != 5) {
	bt_dev_err(hdev, "BCM: USB product length mismatch");
	kfree_skb(skb);
	return ERR_PTR(-EIO);
	}

	return skb;
	}

	static int btbcm_read_info(struct hci_dev *hdev)
	{
	struct sk_buff *skb;

	/* Read Verbose Config Version Info */
	skb = btbcm_read_verbose_config(hdev);
	if (IS_ERR(skb))
	return PTR_ERR(skb);

	bt_dev_info(hdev, "BCM: chip id %u", skb->data[1]);
	kfree_skb(skb);

	/* Read Controller Features */
	skb = btbcm_read_controller_features(hdev);
	if (IS_ERR(skb))
	return PTR_ERR(skb);

	bt_dev_info(hdev, "BCM: features 0x%2.2x", skb->data[1]);
	kfree_skb(skb);

	/* Read Local Name */
	skb = btbcm_read_local_name(hdev);
	if (IS_ERR(skb))
	return PTR_ERR(skb);

	bt_dev_info(hdev, "%s", (char *)(skb->data + 1));
	kfree_skb(skb);

	return 0;
	}

	struct bcm_subver_table {
	u16 subver;
	const char *name;
	};

	static const struct bcm_subver_table bcm_uart_subver_table[] = {
	{ 0x4103, "BCM4330B1" }, /* 002.001.003 */
	{ 0x410e, "BCM43341B0" }, /* 002.001.014 */
	{ 0x4406, "BCM4324B3" }, /* 002.004.006 */
	{ 0x4606, "BCM4324B5" }, /* 002.006.006 */
	{ 0x6109, "BCM4335C0" }, /* 003.001.009 */
	{ 0x610c, "BCM4354" }, /* 003.001.012 */
	{ 0x2122, "BCM4343A0" }, /* 001.001.034 */
	{ 0x2209, "BCM43430A1" }, /* 001.002.009 */
	{ 0x6119, "BCM4345C0" }, /* 003.001.025 */
	{ 0x230f, "BCM4356A2" }, /* 001.003.015 */
	{ }
	};

	static const struct bcm_subver_table bcm_usb_subver_table[] = {
	{ 0x2105, "BCM20703A1" }, /* 001.001.005 */
	{ 0x210b, "BCM43142A0" }, /* 001.001.011 */
	{ 0x2112, "BCM4314A0" }, /* 001.001.018 */
	{ 0x2118, "BCM20702A0" }, /* 001.001.024 */
	{ 0x2126, "BCM4335A0" }, /* 001.001.038 */
	{ 0x220e, "BCM20702A1" }, /* 001.002.014 */
	{ 0x230f, "BCM4354A2" }, /* 001.003.015 */
	{ 0x4106, "BCM4335B0" }, /* 002.001.006 */
	{ 0x410e, "BCM20702B0" }, /* 002.001.014 */
	{ 0x6109, "BCM4335C0" }, /* 003.001.009 */
	{ 0x610c, "BCM4354" }, /* 003.001.012 */
	{ }
	};

	int btbcm_initialize(struct hci_dev hdev, char fw_name, size_t len,
	bool reinit)
	{
	u16 subver, rev, pid, vid;
	const char *hw_name = "BCM";
	struct sk_buff *skb;
	struct hci_rp_read_local_version *ver;
	const struct bcm_subver_table *bcm_subver_table;
	int i, err;

	/* Reset */
	err = btbcm_reset(hdev);
	if (err)
	return err;

	/* Read Local Version Info */
	skb = btbcm_read_local_version(hdev);
	if (IS_ERR(skb))
	return PTR_ERR(skb);

	ver = (struct hci_rp_read_local_version *)skb->data;
	rev = le16_to_cpu(ver->hci_rev);
	subver = le16_to_cpu(ver->lmp_subver);
	kfree_skb(skb);

	/* Read controller information */
	if (!reinit) {
	err = btbcm_read_info(hdev);
	if (err)
	return err;
	}

	/* Upper nibble of rev should be between 0 and 3? */
	if (((rev & 0xf000) >> 12) > 3)
	return 0;

	bcm_subver_table = (hdev->bus == HCI_USB) ? bcm_usb_subver_table :
	bcm_uart_subver_table;

	for (i = 0; bcm_subver_table[i].name; i++) {
	if (subver == bcm_subver_table[i].subver) {
	hw_name = bcm_subver_table[i].name;
	break;
	}
	}

	if (hdev->bus == HCI_USB) {
	/* Read USB Product Info */
	skb = btbcm_read_usb_product(hdev);
	if (IS_ERR(skb))
	return PTR_ERR(skb);

	vid = get_unaligned_le16(skb->data + 1);
	pid = get_unaligned_le16(skb->data + 3);
	kfree_skb(skb);

	snprintf(fw_name, len, "brcm/%s-%4.4x-%4.4x.hcd",
	hw_name, vid, pid);
	} else {
	snprintf(fw_name, len, "brcm/%s.hcd", hw_name);
	}

	bt_dev_info(hdev, "%s (%3.3u.%3.3u.%3.3u) build %4.4u",
	hw_name, (subver & 0xe000) >> 13,
	(subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);

	return 0;
	}
	EXPORT_SYMBOL_GPL(btbcm_initialize);

	int btbcm_finalize(struct hci_dev *hdev)
	{
	char fw_name[64];
	int err;

	/* Re-initialize */
	err = btbcm_initialize(hdev, fw_name, sizeof(fw_name), true);
	if (err)
	return err;

	btbcm_check_bdaddr(hdev);

	set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);

	return 0;
	}
	EXPORT_SYMBOL_GPL(btbcm_finalize);

	int btbcm_setup_patchram(struct hci_dev *hdev)
	{
	char fw_name[64];
	const struct firmware *fw;
	struct sk_buff *skb;
	int err;

	/* Initialize */
	err = btbcm_initialize(hdev, fw_name, sizeof(fw_name), false);
	if (err)
	return err;

	err = request_firmware(&fw, fw_name, &hdev->dev);
	if (err < 0) {
	bt_dev_info(hdev, "BCM: Patch %s not found", fw_name);
	goto done;
	}

	btbcm_patchram(hdev, fw);

	release_firmware(fw);

	/* Re-initialize */
	err = btbcm_initialize(hdev, fw_name, sizeof(fw_name), true);
	if (err)
	return err;

	/* Read Local Name */
	skb = btbcm_read_local_name(hdev);
	if (IS_ERR(skb))
	return PTR_ERR(skb);

	bt_dev_info(hdev, "%s", (char *)(skb->data + 1));
	kfree_skb(skb);

	done:
	btbcm_check_bdaddr(hdev);

	set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);

	return 0;
	}
	EXPORT_SYMBOL_GPL(btbcm_setup_patchram);

	int btbcm_setup_apple(struct hci_dev *hdev)
	{
	struct sk_buff *skb;
	int err;

	/* Reset */
	err = btbcm_reset(hdev);
	if (err)
	return err;

	/* Read Verbose Config Version Info */
	skb = btbcm_read_verbose_config(hdev);
	if (!IS_ERR(skb)) {
	bt_dev_info(hdev, "BCM: chip id %u build %4.4u",
	skb->data[1], get_unaligned_le16(skb->data + 5));
	kfree_skb(skb);
	}

	/* Read USB Product Info */
	skb = btbcm_read_usb_product(hdev);
	if (!IS_ERR(skb)) {
	bt_dev_info(hdev, "BCM: product %4.4x:%4.4x",
	get_unaligned_le16(skb->data + 1),
	get_unaligned_le16(skb->data + 3));
	kfree_skb(skb);
	}

	/* Read Controller Features */
	skb = btbcm_read_controller_features(hdev);
	if (!IS_ERR(skb)) {
	bt_dev_info(hdev, "BCM: features 0x%2.2x", skb->data[1]);
	kfree_skb(skb);
	}

	/* Read Local Name */
	skb = btbcm_read_local_name(hdev);
	if (!IS_ERR(skb)) {
	bt_dev_info(hdev, "%s", (char *)(skb->data + 1));
	kfree_skb(skb);
	}

	set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);

	return 0;
	}
	EXPORT_SYMBOL_GPL(btbcm_setup_apple);

	MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
	MODULE_DESCRIPTION("Bluetooth support for Broadcom devices ver " VERSION);
	MODULE_VERSION(VERSION);
	MODULE_LICENSE("GPL");