Merge tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Fix error output of boot instance creation failure

   Currently if a boot instance creation fails, instead of printing out
   the name of the instance that failed, it prints "(null)". That is
   because it prints "cur_str" that had already been processed by
   strsep(). Print the saved name instead.

   While at it, print the error code of the failure.

 - Fix use-after-free for same named historgrams

   Histograms can be named so that they can be used in multiple events.
   But if the named histogram has a variable attached, the second event
   that uses the named histogram which duplicates it and needs to free
   the original after duplication leaves the old variable in place and
   still visible. If another histogram uses than variable, it will use
   the stale one which will try to reference the freed duplicate
   histogram and crash the kernel.

   Free the duplicate variables along with the duplicated histogram
   data.

 - Check return value of kthread_run() in event self test

   The events self tests uses a kthread for testing but does not check
   if it succeeded in creating a kthread. If the kthread creation were
   to fail, the code will still try to call kthread_stop() on the error
   returned.

 - Fix race between reading trace_pipe and updating subbuffer size

   If a user is reading the trace_pipe file at the same time they update
   the ring buffer sub-buffer size, can cause the trace_pipe read to
   read stale data. Add trace_access_lock() around updating the ring
   buffer sub-buffer size.

 - Fix eventfs_inode on failure path in creation of the events directory

   In the creation of the "events" directory, if after allocating the
   eventfs_inode a failure is detected, it calls cleanup_ei() which
   calls free_ei(). The free_ei() will test if eventfs_inode being freed
   has no children. It is a bug if it does. But on the failure case of
   the creation of the "events" directory, the children lists have not
   yet been initialized and the free will trigger a warning because
   list_empty() on an uninitialized list returns false.

   Move the initialization into init_ei() where it makes more sense and
   makes sure that a created eventfs_inode has its lists initialized
   upon creation.

 - Check return value of kthread_run() in ftrace direct sample code

   The sample code that shows how to use the ftrace direct calls does
   not test the return of kthread_run() to see if it succeeds. Return a
   failure if the kthread_run() doesn't succeed.

 - Clear user events state on fork in case of alloc failure

   On fork, the child gets a pointer to the parent's user events state.
   It makes a copy of it then updates the child's pointer to it. But if
   the allocation fails, the duplication function leaves the child with
   a pointer to its parent's descriptor. When the child cleans up its
   data, it will free the parent's descriptor while the parent is still
   using it.

   In the duplication function, set the child's user_event_mm to NULL
   before testing if the allocation succeeded, and when it exits it will
   not free the parent's descriptor.

 - Fix retry exhaustion in simple ring buffer reader swap

   simple_ring_buffer_swap_reader_page() starts with retry set to 8 and
   post-decrements it only after a failed link replacement. On the final
   attempt, a successful replacement leaves retry at zero, while a
   failed replacement leaves it at -1.

   But the check for success expects the retry value to be non-zero and
   exits with an error on zero. This is the opposite result. Fix it.

 - Fail nicely when the remote swap_reader_page() returns an error

   Currently, if the swap_reader_page() of a remote buffer fails, it
   triggers a WARN_ON_ONCE() and continues normally. Instead, have it
   exit with an error and a pr_warn() print instead of a full WARNING.

* tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  ring-buffer: Stop remote reader update when page swap fails
  tracing: Fix retry exhaustion in simple ring buffer reader swap
  tracing/user_events: Clear copied tracing state before fork duplication
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-modify
  eventfs: Initialize ei->children and ei->list in init_ei()
  tracing: Fix use-after-free in trace_pipe read on sub-buffer order change
  tracing: Fix crash passing ERR_PTR to kthread_stop()
  tracing: Fix use-after-free with same-name named triggers
  tracing: Fix logged instance name on creation failure

1 files changed, 782 insertions, 0 deletions

diff --git a/drivers/bluetooth/btbcm.c b/drivers/bluetooth/btbcm.c
new file mode 100644
index 000000000..463d59890
--- /dev/null
+++ b/drivers/bluetooth/btbcm.c
@@ -0,0 +1,782 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *
+ *  Bluetooth support for Broadcom devices
+ *
+ *  Copyright (C) 2015  Intel Corporation
+ */
+
+#include <linux/efi.h>
+#include <linux/module.h>
+#include <linux/firmware.h>
+#include <linux/dmi.h>
+#include <linux/of.h>
+#include <linux/string.h>
+#include <linux/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_BCM20702A1 (&(bdaddr_t) {{0x00, 0x00, 0xa0, 0x02, 0x70, 0x20}})
+#define BDADDR_BCM2076B1 (&(bdaddr_t) {{0x79, 0x56, 0x00, 0xa0, 0x76, 0x20}})
+#define BDADDR_BCM43430A0 (&(bdaddr_t) {{0xac, 0x1f, 0x12, 0xa0, 0x43, 0x43}})
+#define BDADDR_BCM43430A1 (&(bdaddr_t) {{0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa}})
+#define BDADDR_BCM4324B3 (&(bdaddr_t) {{0x00, 0x00, 0x00, 0xb3, 0x24, 0x43}})
+#define BDADDR_BCM4330B1 (&(bdaddr_t) {{0x00, 0x00, 0x00, 0xb1, 0x30, 0x43}})
+#define BDADDR_BCM4334B0 (&(bdaddr_t) {{0x00, 0x00, 0x00, 0xb0, 0x34, 0x43}})
+#define BDADDR_BCM4345C5 (&(bdaddr_t) {{0xac, 0x1f, 0x00, 0xc5, 0x45, 0x43}})
+#define BDADDR_BCM43341B (&(bdaddr_t) {{0xac, 0x1f, 0x00, 0x1b, 0x34, 0x43}})
+
+#define BCM_FW_NAME_LEN			64
+#define BCM_FW_NAME_COUNT_MAX		4
+/* For kmalloc-ing the fw-name array instead of putting it on the stack */
+typedef char bcm_fw_name[BCM_FW_NAME_LEN];
+
+#ifdef CONFIG_EFI
+static int btbcm_set_bdaddr_from_efi(struct hci_dev *hdev)
+{
+	efi_guid_t guid = EFI_GUID(0x74b00bd9, 0x805a, 0x4d61, 0xb5, 0x1f,
+				   0x43, 0x26, 0x81, 0x23, 0xd1, 0x13);
+	bdaddr_t efi_bdaddr, bdaddr;
+	efi_status_t status;
+	unsigned long len;
+	int ret;
+
+	if (!efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE))
+		return -EOPNOTSUPP;
+
+	len = sizeof(efi_bdaddr);
+	status = efi.get_variable(L"BDADDR", &guid, NULL, &len, &efi_bdaddr);
+	if (status != EFI_SUCCESS)
+		return -ENXIO;
+
+	if (len != sizeof(efi_bdaddr))
+		return -EIO;
+
+	baswap(&bdaddr, &efi_bdaddr);
+
+	ret = btbcm_set_bdaddr(hdev, &bdaddr);
+	if (ret)
+		return ret;
+
+	bt_dev_info(hdev, "BCM: Using EFI device address (%pMR)", &bdaddr);
+	return 0;
+}
+#else
+static int btbcm_set_bdaddr_from_efi(struct hci_dev *hdev)
+{
+	return -EOPNOTSUPP;
+}
+#endif
+
+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 20:70:02:A0:00:00 indicates a BCM20702A1 controller
+	 * with no configured address.
+	 *
+	 * The address 20:76:A0:00:56:79 indicates a BCM2076B1 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.
+	 *
+	 * The address 43:43:A0:12:1F:AC indicates a BCM43430A0 controller
+	 * with no configured address.
+	 *
+	 * The address AA:AA:AA:AA:AA:AA indicates a BCM43430A1 controller
+	 * with no configured address.
+	 */
+	if (!bacmp(&bda->bdaddr, BDADDR_BCM20702A0) ||
+	    !bacmp(&bda->bdaddr, BDADDR_BCM20702A1) ||
+	    !bacmp(&bda->bdaddr, BDADDR_BCM2076B1) ||
+	    !bacmp(&bda->bdaddr, BDADDR_BCM4324B3) ||
+	    !bacmp(&bda->bdaddr, BDADDR_BCM4330B1) ||
+	    !bacmp(&bda->bdaddr, BDADDR_BCM4334B0) ||
+	    !bacmp(&bda->bdaddr, BDADDR_BCM4345C5) ||
+	    !bacmp(&bda->bdaddr, BDADDR_BCM43430A0) ||
+	    !bacmp(&bda->bdaddr, BDADDR_BCM43430A1) ||
+	    !bacmp(&bda->bdaddr, BDADDR_BCM43341B)) {
+		/* Try falling back to BDADDR EFI variable */
+		if (btbcm_set_bdaddr_from_efi(hdev) != 0) {
+			bt_dev_info(hdev, "BCM: Using default device address (%pMR)",
+				    &bda->bdaddr);
+			hci_set_quirk(hdev, HCI_QUIRK_INVALID_BDADDR);
+		}
+	}
+
+	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_read_pcm_int_params(struct hci_dev *hdev,
+			      struct bcm_set_pcm_int_params *params)
+{
+	struct sk_buff *skb;
+	int err = 0;
+
+	skb = __hci_cmd_sync(hdev, 0xfc1d, 0, NULL, HCI_INIT_TIMEOUT);
+	if (IS_ERR(skb)) {
+		err = PTR_ERR(skb);
+		bt_dev_err(hdev, "BCM: Read PCM int params failed (%d)", err);
+		return err;
+	}
+
+	if (skb->len != 6 || skb->data[0]) {
+		bt_dev_err(hdev, "BCM: Read PCM int params length mismatch");
+		kfree_skb(skb);
+		return -EIO;
+	}
+
+	if (params)
+		memcpy(params, skb->data + 1, 5);
+
+	kfree_skb(skb);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(btbcm_read_pcm_int_params);
+
+int btbcm_write_pcm_int_params(struct hci_dev *hdev,
+			       const struct bcm_set_pcm_int_params *params)
+{
+	struct sk_buff *skb;
+	int err;
+
+	skb = __hci_cmd_sync(hdev, 0xfc1c, 5, params, HCI_INIT_TIMEOUT);
+	if (IS_ERR(skb)) {
+		err = PTR_ERR(skb);
+		bt_dev_err(hdev, "BCM: Write PCM int params failed (%d)", err);
+		return err;
+	}
+	kfree_skb(skb);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(btbcm_write_pcm_int_params);
+
+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);
+		return err;
+	}
+	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");
+			return -EINVAL;
+		}
+
+		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);
+			return err;
+		}
+		kfree_skb(skb);
+	}
+
+	/* 250 msec delay after Launch Ram completes */
+	msleep(250);
+
+	return 0;
+}
+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 const struct dmi_system_id disable_broken_read_transmit_power[] = {
+	{
+		 .matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Apple Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro16,1"),
+		},
+	},
+	{
+		 .matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Apple Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro16,2"),
+		},
+	},
+	{
+		 .matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Apple Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro16,4"),
+		},
+	},
+	{
+		 .matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Apple Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir8,1"),
+		},
+	},
+	{
+		 .matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Apple Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir8,2"),
+		},
+	},
+	{
+		 .matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Apple Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "iMac20,1"),
+		},
+	},
+	{
+		 .matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Apple Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "iMac20,2"),
+		},
+	},
+	{ }
+};
+
+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);
+
+	return 0;
+}
+
+static int btbcm_print_controller_features(struct hci_dev *hdev)
+{
+	struct sk_buff *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 DMI and disable broken Read LE Min/Max Tx Power */
+	if (dmi_first_match(disable_broken_read_transmit_power))
+		hci_set_quirk(hdev, HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER);
+
+	return 0;
+}
+
+static int btbcm_print_local_name(struct hci_dev *hdev)
+{
+	struct sk_buff *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[] = {
+	{ 0x1111, "BCM4362A2"	},	/* 000.017.017 */
+	{ 0x4103, "BCM4330B1"	},	/* 002.001.003 */
+	{ 0x410d, "BCM4334B0"	},	/* 002.001.013 */
+	{ 0x410e, "BCM43341B0"	},	/* 002.001.014 */
+	{ 0x4204, "BCM2076B1"	},	/* 002.002.004 */
+	{ 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 */
+	{ 0x6606, "BCM4345C5"	},	/* 003.006.006 */
+	{ 0x230f, "BCM4356A2"	},	/* 001.003.015 */
+	{ 0x2310, "BCM4343A2"	},	/* 001.003.016 */
+	{ 0x220e, "BCM20702A1"  },	/* 001.002.014 */
+	{ 0x420d, "BCM4349B1"	},	/* 002.002.013 */
+	{ 0x420e, "BCM4349B1"	},	/* 002.002.014 */
+	{ 0x4217, "BCM4329B1"   },	/* 002.002.023 */
+	{ 0x6106, "BCM4359C0"	},	/* 003.001.006 */
+	{ 0x4106, "BCM4335A0"	},	/* 002.001.006 */
+	{ 0x410c, "BCM43430B0"	},	/* 002.001.012 */
+	{ 0x2119, "BCM4373A0"	},	/* 001.001.025 */
+	{ }
+};
+
+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, "BCM4356A2"	},	/* 001.003.015 */
+	{ 0x4106, "BCM4335B0"	},	/* 002.001.006 */
+	{ 0x410e, "BCM20702B0"	},	/* 002.001.014 */
+	{ 0x6109, "BCM4335C0"	},	/* 003.001.009 */
+	{ 0x610c, "BCM4354"	},	/* 003.001.012 */
+	{ 0x6607, "BCM4350C5"	},	/* 003.006.007 */
+	{ }
+};
+
+/*
+ * This currently only looks up the device tree board appendix,
+ * but can be expanded to other mechanisms.
+ */
+static const char *btbcm_get_board_name(struct device *dev)
+{
+#ifdef CONFIG_OF
+	struct device_node *root __free(device_node) = of_find_node_by_path("/");
+	char *board_type;
+	const char *tmp;
+
+	if (!root)
+		return NULL;
+
+	if (of_property_read_string_index(root, "compatible", 0, &tmp))
+		return NULL;
+
+	/* get rid of any '/' in the compatible string */
+	board_type = devm_kstrdup(dev, tmp, GFP_KERNEL);
+	if (!board_type)
+		return NULL;
+
+	strreplace(board_type, '/', '-');
+
+	return board_type;
+#else
+	return NULL;
+#endif
+}
+
+int btbcm_initialize(struct hci_dev *hdev, bool *fw_load_done, bool use_autobaud_mode)
+{
+	u16 subver, rev, pid, vid;
+	struct sk_buff *skb;
+	struct hci_rp_read_local_version *ver;
+	const struct bcm_subver_table *bcm_subver_table;
+	const char *hw_name = NULL;
+	const char *board_name;
+	char postfix[16] = "";
+	int fw_name_count = 0;
+	bcm_fw_name *fw_name;
+	const struct firmware *fw;
+	int i, err;
+
+	board_name = btbcm_get_board_name(&hdev->dev);
+
+	/* 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 (!(*fw_load_done)) {
+		err = btbcm_read_info(hdev);
+		if (err)
+			return err;
+	}
+
+	if (!use_autobaud_mode) {
+		err = btbcm_print_controller_features(hdev);
+		if (err)
+			return err;
+
+		err = btbcm_print_local_name(hdev);
+		if (err)
+			return err;
+	}
+
+	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;
+		}
+	}
+
+	bt_dev_info(hdev, "%s (%3.3u.%3.3u.%3.3u) build %4.4u",
+		    hw_name ? hw_name : "BCM", (subver & 0xe000) >> 13,
+		    (subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);
+
+	if (*fw_load_done)
+		return 0;
+
+	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(postfix, sizeof(postfix), "-%4.4x-%4.4x", vid, pid);
+	}
+
+	fw_name = kmalloc_array(BCM_FW_NAME_COUNT_MAX,
+		sizeof(*fw_name),
+		GFP_KERNEL);
+	if (!fw_name)
+		return -ENOMEM;
+
+	if (hw_name) {
+		if (board_name) {
+			snprintf(fw_name[fw_name_count], BCM_FW_NAME_LEN,
+				 "brcm/%s%s.%s.hcd", hw_name, postfix, board_name);
+			fw_name_count++;
+		}
+		snprintf(fw_name[fw_name_count], BCM_FW_NAME_LEN,
+			 "brcm/%s%s.hcd", hw_name, postfix);
+		fw_name_count++;
+	}
+
+	if (board_name) {
+		snprintf(fw_name[fw_name_count], BCM_FW_NAME_LEN,
+			 "brcm/BCM%s.%s.hcd", postfix, board_name);
+		fw_name_count++;
+	}
+	snprintf(fw_name[fw_name_count], BCM_FW_NAME_LEN,
+		 "brcm/BCM%s.hcd", postfix);
+	fw_name_count++;
+
+	for (i = 0; i < fw_name_count; i++) {
+		err = firmware_request_nowarn(&fw, fw_name[i], &hdev->dev);
+		if (err == 0) {
+			bt_dev_info(hdev, "%s '%s' Patch",
+				    hw_name ? hw_name : "BCM", fw_name[i]);
+			*fw_load_done = true;
+			break;
+		}
+	}
+
+	if (*fw_load_done) {
+		err = btbcm_patchram(hdev, fw);
+		if (err)
+			bt_dev_info(hdev, "BCM: Patch failed (%d)", err);
+
+		release_firmware(fw);
+	} else {
+		bt_dev_err(hdev, "BCM: firmware Patch file not found, tried:");
+		for (i = 0; i < fw_name_count; i++)
+			bt_dev_err(hdev, "BCM: '%s'", fw_name[i]);
+	}
+
+	kfree(fw_name);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(btbcm_initialize);
+
+int btbcm_finalize(struct hci_dev *hdev, bool *fw_load_done, bool use_autobaud_mode)
+{
+	int err;
+
+	/* Re-initialize if necessary */
+	if (*fw_load_done) {
+		err = btbcm_initialize(hdev, fw_load_done, use_autobaud_mode);
+		if (err)
+			return err;
+	}
+
+	btbcm_check_bdaddr(hdev);
+
+	hci_set_quirk(hdev, HCI_QUIRK_STRICT_DUPLICATE_FILTER);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(btbcm_finalize);
+
+int btbcm_setup_patchram(struct hci_dev *hdev)
+{
+	bool fw_load_done = false;
+	bool use_autobaud_mode = false;
+	int err;
+
+	/* Initialize */
+	err = btbcm_initialize(hdev, &fw_load_done, use_autobaud_mode);
+	if (err)
+		return err;
+
+	/* Re-initialize after loading Patch */
+	return btbcm_finalize(hdev, &fw_load_done, use_autobaud_mode);
+}
+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);
+	}
+
+	hci_set_quirk(hdev, HCI_QUIRK_STRICT_DUPLICATE_FILTER);
+
+	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");