Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Millar:
 "Here are some highlights from the 2065 networking commits that
  happened this development cycle:

   1) XDP support for IXGBE (John Fastabend) and thunderx (Sunil Kowuri)

   2) Add a generic XDP driver, so that anyone can test XDP even if they
      lack a networking device whose driver has explicit XDP support
      (me).

   3) Sparc64 now has an eBPF JIT too (me)

   4) Add a BPF program testing framework via BPF_PROG_TEST_RUN (Alexei
      Starovoitov)

   5) Make netfitler network namespace teardown less expensive (Florian
      Westphal)

   6) Add symmetric hashing support to nft_hash (Laura Garcia Liebana)

   7) Implement NAPI and GRO in netvsc driver (Stephen Hemminger)

   8) Support TC flower offload statistics in mlxsw (Arkadi Sharshevsky)

   9) Multiqueue support in stmmac driver (Joao Pinto)

  10) Remove TCP timewait recycling, it never really could possibly work
      well in the real world and timestamp randomization really zaps any
      hint of usability this feature had (Soheil Hassas Yeganeh)

  11) Support level3 vs level4 ECMP route hashing in ipv4 (Nikolay
      Aleksandrov)

  12) Add socket busy poll support to epoll (Sridhar Samudrala)

  13) Netlink extended ACK support (Johannes Berg, Pablo Neira Ayuso,
      and several others)

  14) IPSEC hw offload infrastructure (Steffen Klassert)"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (2065 commits)
  tipc: refactor function tipc_sk_recv_stream()
  tipc: refactor function tipc_sk_recvmsg()
  net: thunderx: Optimize page recycling for XDP
  net: thunderx: Support for XDP header adjustment
  net: thunderx: Add support for XDP_TX
  net: thunderx: Add support for XDP_DROP
  net: thunderx: Add basic XDP support
  net: thunderx: Cleanup receive buffer allocation
  net: thunderx: Optimize CQE_TX handling
  net: thunderx: Optimize RBDR descriptor handling
  net: thunderx: Support for page recycling
  ipx: call ipxitf_put() in ioctl error path
  net: sched: add helpers to handle extended actions
  qed*: Fix issues in the ptp filter config implementation.
  qede: Fix concurrency issue in PTP Tx path processing.
  stmmac: Add support for SIMATIC IOT2000 platform
  net: hns: fix ethtool_get_strings overflow in hns driver
  tcp: fix wraparound issue in tcp_lp
  bpf, arm64: fix jit branch offset related to ldimm64
  bpf, arm64: implement jiting of BPF_XADD
  ...

1 files changed, 827 insertions, 0 deletions

diff --git a/drivers/bluetooth/hci_nokia.c b/drivers/bluetooth/hci_nokia.c
new file mode 100644
index 000000000000..a7d687d8d456
--- /dev/null
+++ b/drivers/bluetooth/hci_nokia.c
@@ -0,0 +1,827 @@
+/*
+ *  Bluetooth HCI UART H4 driver with Nokia Extensions AKA Nokia H4+
+ *
+ *  Copyright (C) 2015 Marcel Holtmann <marcel@holtmann.org>
+ *  Copyright (C) 2015-2017 Sebastian Reichel <sre@kernel.org>
+ *
+ *  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.
+ */
+
+#include <linux/clk.h>
+#include <linux/errno.h>
+#include <linux/firmware.h>
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/pm_runtime.h>
+#include <linux/serdev.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/unaligned/le_struct.h>
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+#include "hci_uart.h"
+#include "btbcm.h"
+
+#define VERSION "0.1"
+
+#define NOKIA_ID_BCM2048	0x04
+#define NOKIA_ID_TI1271		0x31
+
+#define FIRMWARE_BCM2048	"nokia/bcmfw.bin"
+#define FIRMWARE_TI1271		"nokia/ti1273.bin"
+
+#define HCI_NOKIA_NEG_PKT	0x06
+#define HCI_NOKIA_ALIVE_PKT	0x07
+#define HCI_NOKIA_RADIO_PKT	0x08
+
+#define HCI_NOKIA_NEG_HDR_SIZE		1
+#define HCI_NOKIA_MAX_NEG_SIZE		255
+#define HCI_NOKIA_ALIVE_HDR_SIZE	1
+#define HCI_NOKIA_MAX_ALIVE_SIZE	255
+#define HCI_NOKIA_RADIO_HDR_SIZE	2
+#define HCI_NOKIA_MAX_RADIO_SIZE	255
+
+#define NOKIA_PROTO_PKT		0x44
+#define NOKIA_PROTO_BYTE	0x4c
+
+#define NOKIA_NEG_REQ		0x00
+#define NOKIA_NEG_ACK		0x20
+#define NOKIA_NEG_NAK		0x40
+
+#define H4_TYPE_SIZE		1
+
+#define NOKIA_RECV_ALIVE \
+	.type = HCI_NOKIA_ALIVE_PKT, \
+	.hlen = HCI_NOKIA_ALIVE_HDR_SIZE, \
+	.loff = 0, \
+	.lsize = 1, \
+	.maxlen = HCI_NOKIA_MAX_ALIVE_SIZE \
+
+#define NOKIA_RECV_NEG \
+	.type = HCI_NOKIA_NEG_PKT, \
+	.hlen = HCI_NOKIA_NEG_HDR_SIZE, \
+	.loff = 0, \
+	.lsize = 1, \
+	.maxlen = HCI_NOKIA_MAX_NEG_SIZE \
+
+#define NOKIA_RECV_RADIO \
+	.type = HCI_NOKIA_RADIO_PKT, \
+	.hlen = HCI_NOKIA_RADIO_HDR_SIZE, \
+	.loff = 1, \
+	.lsize = 1, \
+	.maxlen = HCI_NOKIA_MAX_RADIO_SIZE \
+
+struct hci_nokia_neg_hdr {
+	u8	dlen;
+} __packed;
+
+struct hci_nokia_neg_cmd {
+	u8	ack;
+	u16	baud;
+	u16	unused1;
+	u8	proto;
+	u16	sys_clk;
+	u16	unused2;
+} __packed;
+
+#define NOKIA_ALIVE_REQ   0x55
+#define NOKIA_ALIVE_RESP  0xcc
+
+struct hci_nokia_alive_hdr {
+	u8	dlen;
+} __packed;
+
+struct hci_nokia_alive_pkt {
+	u8	mid;
+	u8	unused;
+} __packed;
+
+struct hci_nokia_neg_evt {
+	u8	ack;
+	u16	baud;
+	u16	unused1;
+	u8	proto;
+	u16	sys_clk;
+	u16	unused2;
+	u8	man_id;
+	u8	ver_id;
+} __packed;
+
+#define MAX_BAUD_RATE		3692300
+#define SETUP_BAUD_RATE		921600
+#define INIT_BAUD_RATE		120000
+
+struct hci_nokia_radio_hdr {
+	u8	evt;
+	u8	dlen;
+} __packed;
+
+struct nokia_bt_dev {
+	struct hci_uart hu;
+	struct serdev_device *serdev;
+
+	struct gpio_desc *reset;
+	struct gpio_desc *wakeup_host;
+	struct gpio_desc *wakeup_bt;
+	unsigned long sysclk_speed;
+
+	int wake_irq;
+	struct sk_buff *rx_skb;
+	struct sk_buff_head txq;
+	bdaddr_t bdaddr;
+
+	int init_error;
+	struct completion init_completion;
+
+	u8 man_id;
+	u8 ver_id;
+
+	bool initialized;
+	bool tx_enabled;
+	bool rx_enabled;
+};
+
+static int nokia_enqueue(struct hci_uart *hu, struct sk_buff *skb);
+
+static void nokia_flow_control(struct serdev_device *serdev, bool enable)
+{
+	if (enable) {
+		serdev_device_set_rts(serdev, true);
+		serdev_device_set_flow_control(serdev, true);
+	} else {
+		serdev_device_set_flow_control(serdev, false);
+		serdev_device_set_rts(serdev, false);
+	}
+}
+
+static irqreturn_t wakeup_handler(int irq, void *data)
+{
+	struct nokia_bt_dev *btdev = data;
+	struct device *dev = &btdev->serdev->dev;
+	int wake_state = gpiod_get_value(btdev->wakeup_host);
+
+	if (btdev->rx_enabled == wake_state)
+		return IRQ_HANDLED;
+
+	if (wake_state)
+		pm_runtime_get(dev);
+	else
+		pm_runtime_put(dev);
+
+	btdev->rx_enabled = wake_state;
+
+	return IRQ_HANDLED;
+}
+
+static int nokia_reset(struct hci_uart *hu)
+{
+	struct nokia_bt_dev *btdev = hu->priv;
+	struct device *dev = &btdev->serdev->dev;
+	int err;
+
+	/* reset routine */
+	gpiod_set_value_cansleep(btdev->reset, 1);
+	gpiod_set_value_cansleep(btdev->wakeup_bt, 1);
+
+	msleep(100);
+
+	/* safety check */
+	err = gpiod_get_value_cansleep(btdev->wakeup_host);
+	if (err == 1) {
+		dev_err(dev, "reset: host wakeup not low!");
+		return -EPROTO;
+	}
+
+	/* flush queue */
+	serdev_device_write_flush(btdev->serdev);
+
+	/* init uart */
+	nokia_flow_control(btdev->serdev, false);
+	serdev_device_set_baudrate(btdev->serdev, INIT_BAUD_RATE);
+
+	gpiod_set_value_cansleep(btdev->reset, 0);
+
+	/* wait for cts */
+	err = serdev_device_wait_for_cts(btdev->serdev, true, 200);
+	if (err < 0) {
+		dev_err(dev, "CTS not received: %d", err);
+		return err;
+	}
+
+	nokia_flow_control(btdev->serdev, true);
+
+	return 0;
+}
+
+static int nokia_send_alive_packet(struct hci_uart *hu)
+{
+	struct nokia_bt_dev *btdev = hu->priv;
+	struct device *dev = &btdev->serdev->dev;
+	struct hci_nokia_alive_hdr *hdr;
+	struct hci_nokia_alive_pkt *pkt;
+	struct sk_buff *skb;
+	int len;
+
+	init_completion(&btdev->init_completion);
+
+	len = H4_TYPE_SIZE + sizeof(*hdr) + sizeof(*pkt);
+	skb = bt_skb_alloc(len, GFP_KERNEL);
+	if (!skb)
+		return -ENOMEM;
+
+	hci_skb_pkt_type(skb) = HCI_NOKIA_ALIVE_PKT;
+	memset(skb->data, 0x00, len);
+
+	hdr = (struct hci_nokia_alive_hdr *)skb_put(skb, sizeof(*hdr));
+	hdr->dlen = sizeof(*pkt);
+	pkt = (struct hci_nokia_alive_pkt *)skb_put(skb, sizeof(*pkt));
+	pkt->mid = NOKIA_ALIVE_REQ;
+
+	nokia_enqueue(hu, skb);
+	hci_uart_tx_wakeup(hu);
+
+	dev_dbg(dev, "Alive sent");
+
+	if (!wait_for_completion_interruptible_timeout(&btdev->init_completion,
+		msecs_to_jiffies(1000))) {
+		return -ETIMEDOUT;
+	}
+
+	if (btdev->init_error < 0)
+		return btdev->init_error;
+
+	return 0;
+}
+
+static int nokia_send_negotiation(struct hci_uart *hu)
+{
+	struct nokia_bt_dev *btdev = hu->priv;
+	struct device *dev = &btdev->serdev->dev;
+	struct hci_nokia_neg_cmd *neg_cmd;
+	struct hci_nokia_neg_hdr *neg_hdr;
+	struct sk_buff *skb;
+	int len, err;
+	u16 baud = DIV_ROUND_CLOSEST(btdev->sysclk_speed * 10, SETUP_BAUD_RATE);
+	int sysclk = btdev->sysclk_speed / 1000;
+
+	len = H4_TYPE_SIZE + sizeof(*neg_hdr) + sizeof(*neg_cmd);
+	skb = bt_skb_alloc(len, GFP_KERNEL);
+	if (!skb)
+		return -ENOMEM;
+
+	hci_skb_pkt_type(skb) = HCI_NOKIA_NEG_PKT;
+
+	neg_hdr = (struct hci_nokia_neg_hdr *)skb_put(skb, sizeof(*neg_hdr));
+	neg_hdr->dlen = sizeof(*neg_cmd);
+
+	neg_cmd = (struct hci_nokia_neg_cmd *)skb_put(skb, sizeof(*neg_cmd));
+	neg_cmd->ack = NOKIA_NEG_REQ;
+	neg_cmd->baud = cpu_to_le16(baud);
+	neg_cmd->unused1 = 0x0000;
+	neg_cmd->proto = NOKIA_PROTO_BYTE;
+	neg_cmd->sys_clk = cpu_to_le16(sysclk);
+	neg_cmd->unused2 = 0x0000;
+
+	btdev->init_error = 0;
+	init_completion(&btdev->init_completion);
+
+	nokia_enqueue(hu, skb);
+	hci_uart_tx_wakeup(hu);
+
+	dev_dbg(dev, "Negotiation sent");
+
+	if (!wait_for_completion_interruptible_timeout(&btdev->init_completion,
+		msecs_to_jiffies(10000))) {
+		return -ETIMEDOUT;
+	}
+
+	if (btdev->init_error < 0)
+		return btdev->init_error;
+
+	/* Change to previously negotiated speed. Flow Control
+	 * is disabled until bluetooth adapter is ready to avoid
+	 * broken bytes being received.
+	 */
+	nokia_flow_control(btdev->serdev, false);
+	serdev_device_set_baudrate(btdev->serdev, SETUP_BAUD_RATE);
+	err = serdev_device_wait_for_cts(btdev->serdev, true, 200);
+	if (err < 0) {
+		dev_err(dev, "CTS not received: %d", err);
+		return err;
+	}
+	nokia_flow_control(btdev->serdev, true);
+
+	dev_dbg(dev, "Negotiation successful");
+
+	return 0;
+}
+
+static int nokia_setup_fw(struct hci_uart *hu)
+{
+	struct nokia_bt_dev *btdev = hu->priv;
+	struct device *dev = &btdev->serdev->dev;
+	const char *fwname;
+	const struct firmware *fw;
+	const u8 *fw_ptr;
+	size_t fw_size;
+	int err;
+
+	dev_dbg(dev, "setup firmware");
+
+	if (btdev->man_id == NOKIA_ID_BCM2048) {
+		fwname = FIRMWARE_BCM2048;
+	} else if (btdev->man_id == NOKIA_ID_TI1271) {
+		fwname = FIRMWARE_TI1271;
+	} else {
+		dev_err(dev, "Unsupported bluetooth device!");
+		return -ENODEV;
+	}
+
+	err = request_firmware(&fw, fwname, dev);
+	if (err < 0) {
+		dev_err(dev, "%s: Failed to load Nokia firmware file (%d)",
+			hu->hdev->name, err);
+		return err;
+	}
+
+	fw_ptr = fw->data;
+	fw_size = fw->size;
+
+	while (fw_size >= 4) {
+		u16 pkt_size = get_unaligned_le16(fw_ptr);
+		u8 pkt_type = fw_ptr[2];
+		const struct hci_command_hdr *cmd;
+		u16 opcode;
+		struct sk_buff *skb;
+
+		switch (pkt_type) {
+		case HCI_COMMAND_PKT:
+			cmd = (struct hci_command_hdr *)(fw_ptr + 3);
+			opcode = le16_to_cpu(cmd->opcode);
+
+			skb = __hci_cmd_sync(hu->hdev, opcode, cmd->plen,
+					     fw_ptr + 3 + HCI_COMMAND_HDR_SIZE,
+					     HCI_INIT_TIMEOUT);
+			if (IS_ERR(skb)) {
+				err = PTR_ERR(skb);
+				dev_err(dev, "%s: FW command %04x failed (%d)",
+				       hu->hdev->name, opcode, err);
+				goto done;
+			}
+			kfree_skb(skb);
+			break;
+		case HCI_NOKIA_RADIO_PKT:
+		case HCI_NOKIA_NEG_PKT:
+		case HCI_NOKIA_ALIVE_PKT:
+			break;
+		}
+
+		fw_ptr += pkt_size + 2;
+		fw_size -= pkt_size + 2;
+	}
+
+done:
+	release_firmware(fw);
+	return err;
+}
+
+static int nokia_setup(struct hci_uart *hu)
+{
+	struct nokia_bt_dev *btdev = hu->priv;
+	struct device *dev = &btdev->serdev->dev;
+	int err;
+
+	btdev->initialized = false;
+
+	nokia_flow_control(btdev->serdev, false);
+
+	pm_runtime_get_sync(dev);
+
+	if (btdev->tx_enabled) {
+		gpiod_set_value_cansleep(btdev->wakeup_bt, 0);
+		pm_runtime_put(&btdev->serdev->dev);
+		btdev->tx_enabled = false;
+	}
+
+	dev_dbg(dev, "protocol setup");
+
+	/* 0. reset connection */
+	err = nokia_reset(hu);
+	if (err < 0) {
+		dev_err(dev, "Reset failed: %d", err);
+		goto out;
+	}
+
+	/* 1. negotiate speed etc */
+	err = nokia_send_negotiation(hu);
+	if (err < 0) {
+		dev_err(dev, "Negotiation failed: %d", err);
+		goto out;
+	}
+
+	/* 2. verify correct setup using alive packet */
+	err = nokia_send_alive_packet(hu);
+	if (err < 0) {
+		dev_err(dev, "Alive check failed: %d", err);
+		goto out;
+	}
+
+	/* 3. send firmware */
+	err = nokia_setup_fw(hu);
+	if (err < 0) {
+		dev_err(dev, "Could not setup FW: %d", err);
+		goto out;
+	}
+
+	nokia_flow_control(btdev->serdev, false);
+	serdev_device_set_baudrate(btdev->serdev, MAX_BAUD_RATE);
+	nokia_flow_control(btdev->serdev, true);
+
+	if (btdev->man_id == NOKIA_ID_BCM2048) {
+		hu->hdev->set_bdaddr = btbcm_set_bdaddr;
+		set_bit(HCI_QUIRK_INVALID_BDADDR, &hu->hdev->quirks);
+		dev_dbg(dev, "bcm2048 has invalid bluetooth address!");
+	}
+
+	dev_dbg(dev, "protocol setup done!");
+
+	gpiod_set_value_cansleep(btdev->wakeup_bt, 0);
+	pm_runtime_put(dev);
+	btdev->tx_enabled = false;
+	btdev->initialized = true;
+
+	return 0;
+out:
+	pm_runtime_put(dev);
+
+	return err;
+}
+
+static int nokia_open(struct hci_uart *hu)
+{
+	struct device *dev = &hu->serdev->dev;
+
+	dev_dbg(dev, "protocol open");
+
+	serdev_device_open(hu->serdev);
+
+	pm_runtime_enable(dev);
+
+	return 0;
+}
+
+static int nokia_flush(struct hci_uart *hu)
+{
+	struct nokia_bt_dev *btdev = hu->priv;
+
+	dev_dbg(&btdev->serdev->dev, "flush device");
+
+	skb_queue_purge(&btdev->txq);
+
+	return 0;
+}
+
+static int nokia_close(struct hci_uart *hu)
+{
+	struct nokia_bt_dev *btdev = hu->priv;
+	struct device *dev = &btdev->serdev->dev;
+
+	dev_dbg(dev, "close device");
+
+	btdev->initialized = false;
+
+	skb_queue_purge(&btdev->txq);
+
+	kfree_skb(btdev->rx_skb);
+
+	/* disable module */
+	gpiod_set_value(btdev->reset, 1);
+	gpiod_set_value(btdev->wakeup_bt, 0);
+
+	pm_runtime_disable(&btdev->serdev->dev);
+	serdev_device_close(btdev->serdev);
+
+	return 0;
+}
+
+/* Enqueue frame for transmittion (padding, crc, etc) */
+static int nokia_enqueue(struct hci_uart *hu, struct sk_buff *skb)
+{
+	struct nokia_bt_dev *btdev = hu->priv;
+	int err;
+
+	/* Prepend skb with frame type */
+	memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
+
+	/* Packets must be word aligned */
+	if (skb->len % 2) {
+		err = skb_pad(skb, 1);
+		if (err)
+			return err;
+		*skb_put(skb, 1) = 0x00;
+	}
+
+	skb_queue_tail(&btdev->txq, skb);
+
+	return 0;
+}
+
+static int nokia_recv_negotiation_packet(struct hci_dev *hdev,
+					 struct sk_buff *skb)
+{
+	struct hci_uart *hu = hci_get_drvdata(hdev);
+	struct nokia_bt_dev *btdev = hu->priv;
+	struct device *dev = &btdev->serdev->dev;
+	struct hci_nokia_neg_hdr *hdr;
+	struct hci_nokia_neg_evt *evt;
+	int ret = 0;
+
+	hdr = (struct hci_nokia_neg_hdr *)skb->data;
+	if (hdr->dlen != sizeof(*evt)) {
+		btdev->init_error = -EIO;
+		ret = -EIO;
+		goto finish_neg;
+	}
+
+	evt = (struct hci_nokia_neg_evt *)skb_pull(skb, sizeof(*hdr));
+
+	if (evt->ack != NOKIA_NEG_ACK) {
+		dev_err(dev, "Negotiation received: wrong reply");
+		btdev->init_error = -EINVAL;
+		ret = -EINVAL;
+		goto finish_neg;
+	}
+
+	btdev->man_id = evt->man_id;
+	btdev->ver_id = evt->ver_id;
+
+	dev_dbg(dev, "Negotiation received: baud=%u:clk=%u:manu=%u:vers=%u",
+		evt->baud, evt->sys_clk, evt->man_id, evt->ver_id);
+
+finish_neg:
+	complete(&btdev->init_completion);
+	kfree_skb(skb);
+	return ret;
+}
+
+static int nokia_recv_alive_packet(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_uart *hu = hci_get_drvdata(hdev);
+	struct nokia_bt_dev *btdev = hu->priv;
+	struct device *dev = &btdev->serdev->dev;
+	struct hci_nokia_alive_hdr *hdr;
+	struct hci_nokia_alive_pkt *pkt;
+	int ret = 0;
+
+	hdr = (struct hci_nokia_alive_hdr *)skb->data;
+	if (hdr->dlen != sizeof(*pkt)) {
+		dev_err(dev, "Corrupted alive message");
+		btdev->init_error = -EIO;
+		ret = -EIO;
+		goto finish_alive;
+	}
+
+	pkt = (struct hci_nokia_alive_pkt *)skb_pull(skb, sizeof(*hdr));
+
+	if (pkt->mid != NOKIA_ALIVE_RESP) {
+		dev_err(dev, "Alive received: invalid response: 0x%02x!",
+			pkt->mid);
+		btdev->init_error = -EINVAL;
+		ret = -EINVAL;
+		goto finish_alive;
+	}
+
+	dev_dbg(dev, "Alive received");
+
+finish_alive:
+	complete(&btdev->init_completion);
+	kfree_skb(skb);
+	return ret;
+}
+
+static int nokia_recv_radio(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	/* Packets received on the dedicated radio channel are
+	 * HCI events and so feed them back into the core.
+	 */
+	hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
+	return hci_recv_frame(hdev, skb);
+}
+
+/* Recv data */
+static const struct h4_recv_pkt nokia_recv_pkts[] = {
+	{ H4_RECV_ACL,		.recv = hci_recv_frame },
+	{ H4_RECV_SCO,		.recv = hci_recv_frame },
+	{ H4_RECV_EVENT,	.recv = hci_recv_frame },
+	{ NOKIA_RECV_ALIVE,	.recv = nokia_recv_alive_packet },
+	{ NOKIA_RECV_NEG,	.recv = nokia_recv_negotiation_packet },
+	{ NOKIA_RECV_RADIO,	.recv = nokia_recv_radio },
+};
+
+static int nokia_recv(struct hci_uart *hu, const void *data, int count)
+{
+	struct nokia_bt_dev *btdev = hu->priv;
+	struct device *dev = &btdev->serdev->dev;
+	int err;
+
+	if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
+		return -EUNATCH;
+
+	btdev->rx_skb = h4_recv_buf(hu->hdev, btdev->rx_skb, data, count,
+				  nokia_recv_pkts, ARRAY_SIZE(nokia_recv_pkts));
+	if (IS_ERR(btdev->rx_skb)) {
+		err = PTR_ERR(btdev->rx_skb);
+		dev_err(dev, "Frame reassembly failed (%d)", err);
+		btdev->rx_skb = NULL;
+		return err;
+	}
+
+	return count;
+}
+
+static struct sk_buff *nokia_dequeue(struct hci_uart *hu)
+{
+	struct nokia_bt_dev *btdev = hu->priv;
+	struct device *dev = &btdev->serdev->dev;
+	struct sk_buff *result = skb_dequeue(&btdev->txq);
+
+	if (!btdev->initialized)
+		return result;
+
+	if (btdev->tx_enabled == !!result)
+		return result;
+
+	if (result) {
+		pm_runtime_get_sync(dev);
+		gpiod_set_value_cansleep(btdev->wakeup_bt, 1);
+	} else {
+		serdev_device_wait_until_sent(btdev->serdev, 0);
+		gpiod_set_value_cansleep(btdev->wakeup_bt, 0);
+		pm_runtime_put(dev);
+	}
+
+	btdev->tx_enabled = !!result;
+
+	return result;
+}
+
+static const struct hci_uart_proto nokia_proto = {
+	.id		= HCI_UART_NOKIA,
+	.name		= "Nokia",
+	.open		= nokia_open,
+	.close		= nokia_close,
+	.recv		= nokia_recv,
+	.enqueue	= nokia_enqueue,
+	.dequeue	= nokia_dequeue,
+	.flush		= nokia_flush,
+	.setup		= nokia_setup,
+	.manufacturer	= 1,
+};
+
+static int nokia_bluetooth_serdev_probe(struct serdev_device *serdev)
+{
+	struct device *dev = &serdev->dev;
+	struct nokia_bt_dev *btdev;
+	struct clk *sysclk;
+	int err = 0;
+
+	btdev = devm_kzalloc(dev, sizeof(*btdev), GFP_KERNEL);
+	if (!btdev)
+		return -ENOMEM;
+
+	btdev->hu.serdev = btdev->serdev = serdev;
+	serdev_device_set_drvdata(serdev, btdev);
+
+	btdev->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+	if (IS_ERR(btdev->reset)) {
+		err = PTR_ERR(btdev->reset);
+		dev_err(dev, "could not get reset gpio: %d", err);
+		return err;
+	}
+
+	btdev->wakeup_host = devm_gpiod_get(dev, "host-wakeup", GPIOD_IN);
+	if (IS_ERR(btdev->wakeup_host)) {
+		err = PTR_ERR(btdev->wakeup_host);
+		dev_err(dev, "could not get host wakeup gpio: %d", err);
+		return err;
+	}
+
+	btdev->wake_irq = gpiod_to_irq(btdev->wakeup_host);
+
+	err = devm_request_threaded_irq(dev, btdev->wake_irq, NULL,
+		wakeup_handler,
+		IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+		"wakeup", btdev);
+	if (err) {
+		dev_err(dev, "could request wakeup irq: %d", err);
+		return err;
+	}
+
+	btdev->wakeup_bt = devm_gpiod_get(dev, "bluetooth-wakeup",
+					   GPIOD_OUT_LOW);
+	if (IS_ERR(btdev->wakeup_bt)) {
+		err = PTR_ERR(btdev->wakeup_bt);
+		dev_err(dev, "could not get BT wakeup gpio: %d", err);
+		return err;
+	}
+
+	sysclk = devm_clk_get(dev, "sysclk");
+	if (IS_ERR(sysclk)) {
+		err = PTR_ERR(sysclk);
+		dev_err(dev, "could not get sysclk: %d", err);
+		return err;
+	}
+
+	clk_prepare_enable(sysclk);
+	btdev->sysclk_speed = clk_get_rate(sysclk);
+	clk_disable_unprepare(sysclk);
+
+	skb_queue_head_init(&btdev->txq);
+
+	btdev->hu.priv = btdev;
+	btdev->hu.alignment = 2; /* Nokia H4+ is word aligned */
+
+	err = hci_uart_register_device(&btdev->hu, &nokia_proto);
+	if (err) {
+		dev_err(dev, "could not register bluetooth uart: %d", err);
+		return err;
+	}
+
+	return 0;
+}
+
+static void nokia_bluetooth_serdev_remove(struct serdev_device *serdev)
+{
+	struct nokia_bt_dev *btdev = serdev_device_get_drvdata(serdev);
+	struct hci_uart *hu = &btdev->hu;
+	struct hci_dev *hdev = hu->hdev;
+
+	cancel_work_sync(&hu->write_work);
+
+	hci_unregister_dev(hdev);
+	hci_free_dev(hdev);
+	hu->proto->close(hu);
+
+	pm_runtime_disable(&btdev->serdev->dev);
+}
+
+static int nokia_bluetooth_runtime_suspend(struct device *dev)
+{
+	struct serdev_device *serdev = to_serdev_device(dev);
+
+	nokia_flow_control(serdev, false);
+	return 0;
+}
+
+static int nokia_bluetooth_runtime_resume(struct device *dev)
+{
+	struct serdev_device *serdev = to_serdev_device(dev);
+
+	nokia_flow_control(serdev, true);
+	return 0;
+}
+
+static const struct dev_pm_ops nokia_bluetooth_pm_ops = {
+	SET_RUNTIME_PM_OPS(nokia_bluetooth_runtime_suspend,
+			   nokia_bluetooth_runtime_resume,
+			   NULL)
+};
+
+#ifdef CONFIG_OF
+static const struct of_device_id nokia_bluetooth_of_match[] = {
+	{ .compatible = "nokia,h4p-bluetooth", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, nokia_bluetooth_of_match);
+#endif
+
+static struct serdev_device_driver nokia_bluetooth_serdev_driver = {
+	.probe = nokia_bluetooth_serdev_probe,
+	.remove = nokia_bluetooth_serdev_remove,
+	.driver = {
+		.name = "nokia-bluetooth",
+		.pm = &nokia_bluetooth_pm_ops,
+		.of_match_table = of_match_ptr(nokia_bluetooth_of_match),
+	},
+};
+
+module_serdev_device_driver(nokia_bluetooth_serdev_driver);
+
+MODULE_AUTHOR("Sebastian Reichel <sre@kernel.org>");
+MODULE_DESCRIPTION("Bluetooth HCI UART Nokia H4+ driver ver " VERSION);
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");