drivers/bluetooth/btbcm.c - kernel/common - 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_ERR("%s: BCM: Reading device address failed (%d)",
 		       hdev->name, err);
 		return err;
 	}

 	if (skb->len != sizeof(*bda)) {
 		BT_ERR("%s: BCM: Device address length mismatch", hdev->name);
 		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_INFO("%s: BCM: Using default device address (%pMR)",
 			hdev->name, &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_ERR("%s: BCM: Change address command failed (%d)",
 		       hdev->name, 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_ERR("%s: BCM: Download Minidrv command failed (%d)",
 		       hdev->name, 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_ERR("%s: BCM: Patch is corrupted", hdev->name);
 			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_ERR("%s: BCM: Patch command %04x failed (%d)",
 			       hdev->name, 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_ERR("%s: BCM: Reset failed (%d)", hdev->name, err);
 		return err;
 	}
 	kfree_skb(skb);

 	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_ERR("%s: BCM: Reading local name failed (%ld)",
 		       hdev->name, PTR_ERR(skb));
 		return skb;
 	}

 	if (skb->len != sizeof(struct hci_rp_read_local_name)) {
 		BT_ERR("%s: BCM: Local name length mismatch", hdev->name);
 		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_ERR("%s: BCM: Reading local version info failed (%ld)",
 		       hdev->name, PTR_ERR(skb));
 		return skb;
 	}

 	if (skb->len != sizeof(struct hci_rp_read_local_version)) {
 		BT_ERR("%s: BCM: Local version length mismatch", hdev->name);
 		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_ERR("%s: BCM: Read verbose config info failed (%ld)",
 		       hdev->name, PTR_ERR(skb));
 		return skb;
 	}

 	if (skb->len != 7) {
 		BT_ERR("%s: BCM: Verbose config length mismatch", hdev->name);
 		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_ERR("%s: BCM: Read USB product info failed (%ld)",
 		       hdev->name, PTR_ERR(skb));
 		return skb;
 	}

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

 	return skb;
 }

 static const struct {
 	u16 subver;
 	const char *name;
 } bcm_uart_subver_table[] = {
 	{ 0x4103, "BCM4330B1"	},	/* 002.001.003 */
 	{ 0x410e, "BCM43341B0"	},	/* 002.001.014 */
 	{ 0x4406, "BCM4324B3"	},	/* 002.004.006 */
 	{ 0x610c, "BCM4354"	},	/* 003.001.012 */
 	{ }
 };

 int btbcm_initialize(struct hci_dev *hdev, char *fw_name, size_t len)
 {
 	u16 subver, rev;
 	const char *hw_name = NULL;
 	struct sk_buff *skb;
 	struct hci_rp_read_local_version *ver;
 	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 Verbose Config Version Info */
 	skb = btbcm_read_verbose_config(hdev);
 	if (IS_ERR(skb))
 		return PTR_ERR(skb);

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

 	switch ((rev & 0xf000) >> 12) {
 	case 0:
 	case 1:
 	case 3:
 		for (i = 0; bcm_uart_subver_table[i].name; i++) {
 			if (subver == bcm_uart_subver_table[i].subver) {
 				hw_name = bcm_uart_subver_table[i].name;
 				break;
 			}
 		}

 		snprintf(fw_name, len, "brcm/%s.hcd", hw_name ? : "BCM");
 		break;
 	default:
 		return 0;
 	}

 	BT_INFO("%s: %s (%3.3u.%3.3u.%3.3u) build %4.4u", hdev->name,
 		hw_name ? : "BCM", (subver & 0xe000) >> 13,
 		(subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);

 	return 0;
 }
 EXPORT_SYMBOL_GPL(btbcm_initialize);

 int btbcm_finalize(struct hci_dev *hdev)
 {
 	struct sk_buff *skb;
 	struct hci_rp_read_local_version *ver;
 	u16 subver, rev;
 	int 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);

 	BT_INFO("%s: BCM (%3.3u.%3.3u.%3.3u) build %4.4u", hdev->name,
 		(subver & 0xe000) >> 13, (subver & 0x1f00) >> 8,
 		(subver & 0x00ff), rev & 0x0fff);

 	btbcm_check_bdaddr(hdev);

 	set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);

 	return 0;
 }
 EXPORT_SYMBOL_GPL(btbcm_finalize);

 static const struct {
 	u16 subver;
 	const char *name;
 } bcm_usb_subver_table[] = {
 	{ 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_setup_patchram(struct hci_dev *hdev)
 {
 	char fw_name[64];
 	const struct firmware *fw;
 	u16 subver, rev, pid, vid;
 	const char *hw_name = NULL;
 	struct sk_buff *skb;
 	struct hci_rp_read_local_version *ver;
 	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 Verbose Config Version Info */
 	skb = btbcm_read_verbose_config(hdev);
 	if (IS_ERR(skb))
 		return PTR_ERR(skb);

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

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

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

 	switch ((rev & 0xf000) >> 12) {
 	case 0:
 	case 3:
 		for (i = 0; bcm_uart_subver_table[i].name; i++) {
 			if (subver == bcm_uart_subver_table[i].subver) {
 				hw_name = bcm_uart_subver_table[i].name;
 				break;
 			}
 		}

 		snprintf(fw_name, sizeof(fw_name), "brcm/%s.hcd",
 			 hw_name ? : "BCM");
 		break;
 	case 1:
 	case 2:
 		/* 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);

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

 		snprintf(fw_name, sizeof(fw_name), "brcm/%s-%4.4x-%4.4x.hcd",
 			 hw_name ? : "BCM", vid, pid);
 		break;
 	default:
 		return 0;
 	}

 	BT_INFO("%s: %s (%3.3u.%3.3u.%3.3u) build %4.4u", hdev->name,
 		hw_name ? : "BCM", (subver & 0xe000) >> 13,
 		(subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);

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

 	btbcm_patchram(hdev, fw);

 	release_firmware(fw);

 	/* 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);

 	BT_INFO("%s: %s (%3.3u.%3.3u.%3.3u) build %4.4u", hdev->name,
 		hw_name ? : "BCM", (subver & 0xe000) >> 13,
 		(subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);

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

 	BT_INFO("%s: %s", hdev->name, (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_INFO("%s: BCM: chip id %u build %4.4u", hdev->name,
 			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_INFO("%s: BCM: product %4.4x:%4.4x", hdev->name,
 			get_unaligned_le16(skb->data + 1),
 			get_unaligned_le16(skb->data + 3));
 		kfree_skb(skb);
 	}

 	/* Read Local Name */
 	skb = btbcm_read_local_name(hdev);
 	if (!IS_ERR(skb)) {
 		BT_INFO("%s: %s", hdev->name, (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 <[email protected]>");
 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_ERR("%s: BCM: Reading device address failed (%d)",
	hdev->name, err);
	return err;
	}

	if (skb->len != sizeof(*bda)) {
	BT_ERR("%s: BCM: Device address length mismatch", hdev->name);
	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_INFO("%s: BCM: Using default device address (%pMR)",
	hdev->name, &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_ERR("%s: BCM: Change address command failed (%d)",
	hdev->name, 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_ERR("%s: BCM: Download Minidrv command failed (%d)",
	hdev->name, 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_ERR("%s: BCM: Patch is corrupted", hdev->name);
	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_ERR("%s: BCM: Patch command %04x failed (%d)",
	hdev->name, 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_ERR("%s: BCM: Reset failed (%d)", hdev->name, err);
	return err;
	}
	kfree_skb(skb);

	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_ERR("%s: BCM: Reading local name failed (%ld)",
	hdev->name, PTR_ERR(skb));
	return skb;
	}

	if (skb->len != sizeof(struct hci_rp_read_local_name)) {
	BT_ERR("%s: BCM: Local name length mismatch", hdev->name);
	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_ERR("%s: BCM: Reading local version info failed (%ld)",
	hdev->name, PTR_ERR(skb));
	return skb;
	}

	if (skb->len != sizeof(struct hci_rp_read_local_version)) {
	BT_ERR("%s: BCM: Local version length mismatch", hdev->name);
	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_ERR("%s: BCM: Read verbose config info failed (%ld)",
	hdev->name, PTR_ERR(skb));
	return skb;
	}

	if (skb->len != 7) {
	BT_ERR("%s: BCM: Verbose config length mismatch", hdev->name);
	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_ERR("%s: BCM: Read USB product info failed (%ld)",
	hdev->name, PTR_ERR(skb));
	return skb;
	}

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

	return skb;
	}

	static const struct {
	u16 subver;
	const char *name;
	} bcm_uart_subver_table[] = {
	{ 0x4103, "BCM4330B1" }, /* 002.001.003 */
	{ 0x410e, "BCM43341B0" }, /* 002.001.014 */
	{ 0x4406, "BCM4324B3" }, /* 002.004.006 */
	{ 0x610c, "BCM4354" }, /* 003.001.012 */
	{ }
	};

	int btbcm_initialize(struct hci_dev hdev, char fw_name, size_t len)
	{
	u16 subver, rev;
	const char *hw_name = NULL;
	struct sk_buff *skb;
	struct hci_rp_read_local_version *ver;
	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 Verbose Config Version Info */
	skb = btbcm_read_verbose_config(hdev);
	if (IS_ERR(skb))
	return PTR_ERR(skb);

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

	switch ((rev & 0xf000) >> 12) {
	case 0:
	case 1:
	case 3:
	for (i = 0; bcm_uart_subver_table[i].name; i++) {
	if (subver == bcm_uart_subver_table[i].subver) {
	hw_name = bcm_uart_subver_table[i].name;
	break;
	}
	}

	snprintf(fw_name, len, "brcm/%s.hcd", hw_name ? : "BCM");
	break;
	default:
	return 0;
	}

	BT_INFO("%s: %s (%3.3u.%3.3u.%3.3u) build %4.4u", hdev->name,
	hw_name ? : "BCM", (subver & 0xe000) >> 13,
	(subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);

	return 0;
	}
	EXPORT_SYMBOL_GPL(btbcm_initialize);

	int btbcm_finalize(struct hci_dev *hdev)
	{
	struct sk_buff *skb;
	struct hci_rp_read_local_version *ver;
	u16 subver, rev;
	int 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);

	BT_INFO("%s: BCM (%3.3u.%3.3u.%3.3u) build %4.4u", hdev->name,
	(subver & 0xe000) >> 13, (subver & 0x1f00) >> 8,
	(subver & 0x00ff), rev & 0x0fff);

	btbcm_check_bdaddr(hdev);

	set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);

	return 0;
	}
	EXPORT_SYMBOL_GPL(btbcm_finalize);

	static const struct {
	u16 subver;
	const char *name;
	} bcm_usb_subver_table[] = {
	{ 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_setup_patchram(struct hci_dev *hdev)
	{
	char fw_name[64];
	const struct firmware *fw;
	u16 subver, rev, pid, vid;
	const char *hw_name = NULL;
	struct sk_buff *skb;
	struct hci_rp_read_local_version *ver;
	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 Verbose Config Version Info */
	skb = btbcm_read_verbose_config(hdev);
	if (IS_ERR(skb))
	return PTR_ERR(skb);

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

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

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

	switch ((rev & 0xf000) >> 12) {
	case 0:
	case 3:
	for (i = 0; bcm_uart_subver_table[i].name; i++) {
	if (subver == bcm_uart_subver_table[i].subver) {
	hw_name = bcm_uart_subver_table[i].name;
	break;
	}
	}

	snprintf(fw_name, sizeof(fw_name), "brcm/%s.hcd",
	hw_name ? : "BCM");
	break;
	case 1:
	case 2:
	/* 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);

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

	snprintf(fw_name, sizeof(fw_name), "brcm/%s-%4.4x-%4.4x.hcd",
	hw_name ? : "BCM", vid, pid);
	break;
	default:
	return 0;
	}

	BT_INFO("%s: %s (%3.3u.%3.3u.%3.3u) build %4.4u", hdev->name,
	hw_name ? : "BCM", (subver & 0xe000) >> 13,
	(subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);

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

	btbcm_patchram(hdev, fw);

	release_firmware(fw);

	/* 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);

	BT_INFO("%s: %s (%3.3u.%3.3u.%3.3u) build %4.4u", hdev->name,
	hw_name ? : "BCM", (subver & 0xe000) >> 13,
	(subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);

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

	BT_INFO("%s: %s", hdev->name, (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_INFO("%s: BCM: chip id %u build %4.4u", hdev->name,
	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_INFO("%s: BCM: product %4.4x:%4.4x", hdev->name,
	get_unaligned_le16(skb->data + 1),
	get_unaligned_le16(skb->data + 3));
	kfree_skb(skb);
	}

	/* Read Local Name */
	skb = btbcm_read_local_name(hdev);
	if (!IS_ERR(skb)) {
	BT_INFO("%s: %s", hdev->name, (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 <[email protected]>");
	MODULE_DESCRIPTION("Bluetooth support for Broadcom devices ver " VERSION);
	MODULE_VERSION(VERSION);
	MODULE_LICENSE("GPL");