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linux-next/drivers/bluetooth/hci_intel.c
Loic Poulain 1ab1f239bf Bluetooth: hci_intel: Add support for platform driver
A platform device can be used to provide some specific resources in
order to manage the controller. In this first patch we retrieve the
reset gpio which is used to power on/off the controller.

The main issue is to match the current tty with the correct pdev.
In case of ACPI, we can easily find the right tty/pdev pair because
they are both child of the same UART port.

If controller is powered-on from the driver, we need to wait for a
HCI boot event before being able to send any command.

Signed-off-by: Loic Poulain <loic.poulain@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2015-08-28 21:00:38 +02:00

888 lines
21 KiB
C

/*
*
* Bluetooth HCI UART driver for Intel 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/kernel.h>
#include <linux/errno.h>
#include <linux/skbuff.h>
#include <linux/firmware.h>
#include <linux/module.h>
#include <linux/wait.h>
#include <linux/tty.h>
#include <linux/platform_device.h>
#include <linux/gpio/consumer.h>
#include <linux/acpi.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
#include "hci_uart.h"
#include "btintel.h"
#define STATE_BOOTLOADER 0
#define STATE_DOWNLOADING 1
#define STATE_FIRMWARE_LOADED 2
#define STATE_FIRMWARE_FAILED 3
#define STATE_BOOTING 4
struct intel_device {
struct list_head list;
struct platform_device *pdev;
struct gpio_desc *reset;
};
static LIST_HEAD(intel_device_list);
static DEFINE_SPINLOCK(intel_device_list_lock);
struct intel_data {
struct sk_buff *rx_skb;
struct sk_buff_head txq;
unsigned long flags;
};
static u8 intel_convert_speed(unsigned int speed)
{
switch (speed) {
case 9600:
return 0x00;
case 19200:
return 0x01;
case 38400:
return 0x02;
case 57600:
return 0x03;
case 115200:
return 0x04;
case 230400:
return 0x05;
case 460800:
return 0x06;
case 921600:
return 0x07;
case 1843200:
return 0x08;
case 3250000:
return 0x09;
case 2000000:
return 0x0a;
case 3000000:
return 0x0b;
default:
return 0xff;
}
}
static int intel_wait_booting(struct hci_uart *hu)
{
struct intel_data *intel = hu->priv;
int err;
err = wait_on_bit_timeout(&intel->flags, STATE_BOOTING,
TASK_INTERRUPTIBLE,
msecs_to_jiffies(1000));
if (err == 1) {
BT_ERR("%s: Device boot interrupted", hu->hdev->name);
return -EINTR;
}
if (err) {
BT_ERR("%s: Device boot timeout", hu->hdev->name);
return -ETIMEDOUT;
}
return err;
}
static int intel_set_power(struct hci_uart *hu, bool powered)
{
struct list_head *p;
int err = -ENODEV;
spin_lock(&intel_device_list_lock);
list_for_each(p, &intel_device_list) {
struct intel_device *idev = list_entry(p, struct intel_device,
list);
/* tty device and pdev device should share the same parent
* which is the UART port.
*/
if (hu->tty->dev->parent != idev->pdev->dev.parent)
continue;
if (!idev->reset) {
err = -ENOTSUPP;
break;
}
BT_INFO("hu %p, Switching compatible pm device (%s) to %u",
hu, dev_name(&idev->pdev->dev), powered);
gpiod_set_value(idev->reset, powered);
}
spin_unlock(&intel_device_list_lock);
return err;
}
static int intel_open(struct hci_uart *hu)
{
struct intel_data *intel;
BT_DBG("hu %p", hu);
intel = kzalloc(sizeof(*intel), GFP_KERNEL);
if (!intel)
return -ENOMEM;
skb_queue_head_init(&intel->txq);
hu->priv = intel;
if (!intel_set_power(hu, true))
set_bit(STATE_BOOTING, &intel->flags);
return 0;
}
static int intel_close(struct hci_uart *hu)
{
struct intel_data *intel = hu->priv;
BT_DBG("hu %p", hu);
intel_set_power(hu, false);
skb_queue_purge(&intel->txq);
kfree_skb(intel->rx_skb);
kfree(intel);
hu->priv = NULL;
return 0;
}
static int intel_flush(struct hci_uart *hu)
{
struct intel_data *intel = hu->priv;
BT_DBG("hu %p", hu);
skb_queue_purge(&intel->txq);
return 0;
}
static int inject_cmd_complete(struct hci_dev *hdev, __u16 opcode)
{
struct sk_buff *skb;
struct hci_event_hdr *hdr;
struct hci_ev_cmd_complete *evt;
skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*evt) + 1, GFP_ATOMIC);
if (!skb)
return -ENOMEM;
hdr = (struct hci_event_hdr *)skb_put(skb, sizeof(*hdr));
hdr->evt = HCI_EV_CMD_COMPLETE;
hdr->plen = sizeof(*evt) + 1;
evt = (struct hci_ev_cmd_complete *)skb_put(skb, sizeof(*evt));
evt->ncmd = 0x01;
evt->opcode = cpu_to_le16(opcode);
*skb_put(skb, 1) = 0x00;
bt_cb(skb)->pkt_type = HCI_EVENT_PKT;
return hci_recv_frame(hdev, skb);
}
static int intel_set_baudrate(struct hci_uart *hu, unsigned int speed)
{
struct intel_data *intel = hu->priv;
struct hci_dev *hdev = hu->hdev;
u8 speed_cmd[] = { 0x06, 0xfc, 0x01, 0x00 };
struct sk_buff *skb;
int err;
/* This can be the first command sent to the chip, check
* that the controller is ready.
*/
err = intel_wait_booting(hu);
clear_bit(STATE_BOOTING, &intel->flags);
/* In case of timeout, try to continue anyway */
if (err && err != ETIMEDOUT)
return err;
BT_INFO("%s: Change controller speed to %d", hdev->name, speed);
speed_cmd[3] = intel_convert_speed(speed);
if (speed_cmd[3] == 0xff) {
BT_ERR("%s: Unsupported speed", hdev->name);
return -EINVAL;
}
/* Device will not accept speed change if Intel version has not been
* previously requested.
*/
skb = __hci_cmd_sync(hdev, 0xfc05, 0, NULL, HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
BT_ERR("%s: Reading Intel version information failed (%ld)",
hdev->name, PTR_ERR(skb));
return PTR_ERR(skb);
}
kfree_skb(skb);
skb = bt_skb_alloc(sizeof(speed_cmd), GFP_KERNEL);
if (!skb) {
BT_ERR("%s: Failed to allocate memory for baudrate packet",
hdev->name);
return -ENOMEM;
}
memcpy(skb_put(skb, sizeof(speed_cmd)), speed_cmd, sizeof(speed_cmd));
bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
hci_uart_set_flow_control(hu, true);
skb_queue_tail(&intel->txq, skb);
hci_uart_tx_wakeup(hu);
/* wait 100ms to change baudrate on controller side */
msleep(100);
hci_uart_set_baudrate(hu, speed);
hci_uart_set_flow_control(hu, false);
return 0;
}
static int intel_setup(struct hci_uart *hu)
{
static const u8 reset_param[] = { 0x00, 0x01, 0x00, 0x01,
0x00, 0x08, 0x04, 0x00 };
struct intel_data *intel = hu->priv;
struct hci_dev *hdev = hu->hdev;
struct sk_buff *skb;
struct intel_version *ver;
struct intel_boot_params *params;
const struct firmware *fw;
const u8 *fw_ptr;
char fwname[64];
u32 frag_len;
ktime_t calltime, delta, rettime;
unsigned long long duration;
unsigned int init_speed, oper_speed;
int speed_change = 0;
int err;
BT_DBG("%s", hdev->name);
hu->hdev->set_bdaddr = btintel_set_bdaddr;
calltime = ktime_get();
if (hu->init_speed)
init_speed = hu->init_speed;
else
init_speed = hu->proto->init_speed;
if (hu->oper_speed)
oper_speed = hu->oper_speed;
else
oper_speed = hu->proto->oper_speed;
if (oper_speed && init_speed && oper_speed != init_speed)
speed_change = 1;
/* Check that the controller is ready */
err = intel_wait_booting(hu);
clear_bit(STATE_BOOTING, &intel->flags);
/* In case of timeout, try to continue anyway */
if (err && err != ETIMEDOUT)
return err;
set_bit(STATE_BOOTLOADER, &intel->flags);
/* Read the Intel version information to determine if the device
* is in bootloader mode or if it already has operational firmware
* loaded.
*/
skb = __hci_cmd_sync(hdev, 0xfc05, 0, NULL, HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
BT_ERR("%s: Reading Intel version information failed (%ld)",
hdev->name, PTR_ERR(skb));
return PTR_ERR(skb);
}
if (skb->len != sizeof(*ver)) {
BT_ERR("%s: Intel version event size mismatch", hdev->name);
kfree_skb(skb);
return -EILSEQ;
}
ver = (struct intel_version *)skb->data;
if (ver->status) {
BT_ERR("%s: Intel version command failure (%02x)",
hdev->name, ver->status);
err = -bt_to_errno(ver->status);
kfree_skb(skb);
return err;
}
/* The hardware platform number has a fixed value of 0x37 and
* for now only accept this single value.
*/
if (ver->hw_platform != 0x37) {
BT_ERR("%s: Unsupported Intel hardware platform (%u)",
hdev->name, ver->hw_platform);
kfree_skb(skb);
return -EINVAL;
}
/* At the moment only the hardware variant iBT 3.0 (LnP/SfP) is
* supported by this firmware loading method. This check has been
* put in place to ensure correct forward compatibility options
* when newer hardware variants come along.
*/
if (ver->hw_variant != 0x0b) {
BT_ERR("%s: Unsupported Intel hardware variant (%u)",
hdev->name, ver->hw_variant);
kfree_skb(skb);
return -EINVAL;
}
btintel_version_info(hdev, ver);
/* The firmware variant determines if the device is in bootloader
* mode or is running operational firmware. The value 0x06 identifies
* the bootloader and the value 0x23 identifies the operational
* firmware.
*
* When the operational firmware is already present, then only
* the check for valid Bluetooth device address is needed. This
* determines if the device will be added as configured or
* unconfigured controller.
*
* It is not possible to use the Secure Boot Parameters in this
* case since that command is only available in bootloader mode.
*/
if (ver->fw_variant == 0x23) {
kfree_skb(skb);
clear_bit(STATE_BOOTLOADER, &intel->flags);
btintel_check_bdaddr(hdev);
return 0;
}
/* If the device is not in bootloader mode, then the only possible
* choice is to return an error and abort the device initialization.
*/
if (ver->fw_variant != 0x06) {
BT_ERR("%s: Unsupported Intel firmware variant (%u)",
hdev->name, ver->fw_variant);
kfree_skb(skb);
return -ENODEV;
}
kfree_skb(skb);
/* Read the secure boot parameters to identify the operating
* details of the bootloader.
*/
skb = __hci_cmd_sync(hdev, 0xfc0d, 0, NULL, HCI_INIT_TIMEOUT);
if (IS_ERR(skb)) {
BT_ERR("%s: Reading Intel boot parameters failed (%ld)",
hdev->name, PTR_ERR(skb));
return PTR_ERR(skb);
}
if (skb->len != sizeof(*params)) {
BT_ERR("%s: Intel boot parameters size mismatch", hdev->name);
kfree_skb(skb);
return -EILSEQ;
}
params = (struct intel_boot_params *)skb->data;
if (params->status) {
BT_ERR("%s: Intel boot parameters command failure (%02x)",
hdev->name, params->status);
err = -bt_to_errno(params->status);
kfree_skb(skb);
return err;
}
BT_INFO("%s: Device revision is %u", hdev->name,
le16_to_cpu(params->dev_revid));
BT_INFO("%s: Secure boot is %s", hdev->name,
params->secure_boot ? "enabled" : "disabled");
BT_INFO("%s: Minimum firmware build %u week %u %u", hdev->name,
params->min_fw_build_nn, params->min_fw_build_cw,
2000 + params->min_fw_build_yy);
/* It is required that every single firmware fragment is acknowledged
* with a command complete event. If the boot parameters indicate
* that this bootloader does not send them, then abort the setup.
*/
if (params->limited_cce != 0x00) {
BT_ERR("%s: Unsupported Intel firmware loading method (%u)",
hdev->name, params->limited_cce);
kfree_skb(skb);
return -EINVAL;
}
/* If the OTP has no valid Bluetooth device address, then there will
* also be no valid address for the operational firmware.
*/
if (!bacmp(&params->otp_bdaddr, BDADDR_ANY)) {
BT_INFO("%s: No device address configured", hdev->name);
set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
}
/* With this Intel bootloader only the hardware variant and device
* revision information are used to select the right firmware.
*
* Currently this bootloader support is limited to hardware variant
* iBT 3.0 (LnP/SfP) which is identified by the value 11 (0x0b).
*/
snprintf(fwname, sizeof(fwname), "intel/ibt-11-%u.sfi",
le16_to_cpu(params->dev_revid));
err = request_firmware(&fw, fwname, &hdev->dev);
if (err < 0) {
BT_ERR("%s: Failed to load Intel firmware file (%d)",
hdev->name, err);
kfree_skb(skb);
return err;
}
BT_INFO("%s: Found device firmware: %s", hdev->name, fwname);
kfree_skb(skb);
if (fw->size < 644) {
BT_ERR("%s: Invalid size of firmware file (%zu)",
hdev->name, fw->size);
err = -EBADF;
goto done;
}
set_bit(STATE_DOWNLOADING, &intel->flags);
/* Start the firmware download transaction with the Init fragment
* represented by the 128 bytes of CSS header.
*/
err = btintel_secure_send(hdev, 0x00, 128, fw->data);
if (err < 0) {
BT_ERR("%s: Failed to send firmware header (%d)",
hdev->name, err);
goto done;
}
/* Send the 256 bytes of public key information from the firmware
* as the PKey fragment.
*/
err = btintel_secure_send(hdev, 0x03, 256, fw->data + 128);
if (err < 0) {
BT_ERR("%s: Failed to send firmware public key (%d)",
hdev->name, err);
goto done;
}
/* Send the 256 bytes of signature information from the firmware
* as the Sign fragment.
*/
err = btintel_secure_send(hdev, 0x02, 256, fw->data + 388);
if (err < 0) {
BT_ERR("%s: Failed to send firmware signature (%d)",
hdev->name, err);
goto done;
}
fw_ptr = fw->data + 644;
frag_len = 0;
while (fw_ptr - fw->data < fw->size) {
struct hci_command_hdr *cmd = (void *)(fw_ptr + frag_len);
frag_len += sizeof(*cmd) + cmd->plen;
BT_DBG("%s: patching %td/%zu", hdev->name,
(fw_ptr - fw->data), fw->size);
/* The parameter length of the secure send command requires
* a 4 byte alignment. It happens so that the firmware file
* contains proper Intel_NOP commands to align the fragments
* as needed.
*
* Send set of commands with 4 byte alignment from the
* firmware data buffer as a single Data fragement.
*/
if (frag_len % 4)
continue;
/* Send each command from the firmware data buffer as
* a single Data fragment.
*/
err = btintel_secure_send(hdev, 0x01, frag_len, fw_ptr);
if (err < 0) {
BT_ERR("%s: Failed to send firmware data (%d)",
hdev->name, err);
goto done;
}
fw_ptr += frag_len;
frag_len = 0;
}
set_bit(STATE_FIRMWARE_LOADED, &intel->flags);
BT_INFO("%s: Waiting for firmware download to complete", hdev->name);
/* Before switching the device into operational mode and with that
* booting the loaded firmware, wait for the bootloader notification
* that all fragments have been successfully received.
*
* When the event processing receives the notification, then the
* STATE_DOWNLOADING flag will be cleared.
*
* The firmware loading should not take longer than 5 seconds
* and thus just timeout if that happens and fail the setup
* of this device.
*/
err = wait_on_bit_timeout(&intel->flags, STATE_DOWNLOADING,
TASK_INTERRUPTIBLE,
msecs_to_jiffies(5000));
if (err == 1) {
BT_ERR("%s: Firmware loading interrupted", hdev->name);
err = -EINTR;
goto done;
}
if (err) {
BT_ERR("%s: Firmware loading timeout", hdev->name);
err = -ETIMEDOUT;
goto done;
}
if (test_bit(STATE_FIRMWARE_FAILED, &intel->flags)) {
BT_ERR("%s: Firmware loading failed", hdev->name);
err = -ENOEXEC;
goto done;
}
rettime = ktime_get();
delta = ktime_sub(rettime, calltime);
duration = (unsigned long long) ktime_to_ns(delta) >> 10;
BT_INFO("%s: Firmware loaded in %llu usecs", hdev->name, duration);
done:
release_firmware(fw);
if (err < 0)
return err;
/* We need to restore the default speed before Intel reset */
if (speed_change) {
err = intel_set_baudrate(hu, init_speed);
if (err)
return err;
}
calltime = ktime_get();
set_bit(STATE_BOOTING, &intel->flags);
skb = __hci_cmd_sync(hdev, 0xfc01, sizeof(reset_param), reset_param,
HCI_INIT_TIMEOUT);
if (IS_ERR(skb))
return PTR_ERR(skb);
kfree_skb(skb);
/* The bootloader will not indicate when the device is ready. This
* is done by the operational firmware sending bootup notification.
*
* Booting into operational firmware should not take longer than
* 1 second. However if that happens, then just fail the setup
* since something went wrong.
*/
BT_INFO("%s: Waiting for device to boot", hdev->name);
err = intel_wait_booting(hu);
if (err)
return err;
clear_bit(STATE_BOOTING, &intel->flags);
rettime = ktime_get();
delta = ktime_sub(rettime, calltime);
duration = (unsigned long long) ktime_to_ns(delta) >> 10;
BT_INFO("%s: Device booted in %llu usecs", hdev->name, duration);
skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_CMD_TIMEOUT);
if (IS_ERR(skb))
return PTR_ERR(skb);
kfree_skb(skb);
if (speed_change) {
err = intel_set_baudrate(hu, oper_speed);
if (err)
return err;
}
BT_INFO("%s: Setup complete", hdev->name);
clear_bit(STATE_BOOTLOADER, &intel->flags);
return 0;
}
static int intel_recv_event(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_uart *hu = hci_get_drvdata(hdev);
struct intel_data *intel = hu->priv;
struct hci_event_hdr *hdr;
if (!test_bit(STATE_BOOTLOADER, &intel->flags) &&
!test_bit(STATE_BOOTING, &intel->flags))
goto recv;
hdr = (void *)skb->data;
/* When the firmware loading completes the device sends
* out a vendor specific event indicating the result of
* the firmware loading.
*/
if (skb->len == 7 && hdr->evt == 0xff && hdr->plen == 0x05 &&
skb->data[2] == 0x06) {
if (skb->data[3] != 0x00)
set_bit(STATE_FIRMWARE_FAILED, &intel->flags);
if (test_and_clear_bit(STATE_DOWNLOADING, &intel->flags) &&
test_bit(STATE_FIRMWARE_LOADED, &intel->flags)) {
smp_mb__after_atomic();
wake_up_bit(&intel->flags, STATE_DOWNLOADING);
}
/* When switching to the operational firmware the device
* sends a vendor specific event indicating that the bootup
* completed.
*/
} else if (skb->len == 9 && hdr->evt == 0xff && hdr->plen == 0x07 &&
skb->data[2] == 0x02) {
if (test_and_clear_bit(STATE_BOOTING, &intel->flags)) {
smp_mb__after_atomic();
wake_up_bit(&intel->flags, STATE_BOOTING);
}
}
recv:
return hci_recv_frame(hdev, skb);
}
static const struct h4_recv_pkt intel_recv_pkts[] = {
{ H4_RECV_ACL, .recv = hci_recv_frame },
{ H4_RECV_SCO, .recv = hci_recv_frame },
{ H4_RECV_EVENT, .recv = intel_recv_event },
};
static int intel_recv(struct hci_uart *hu, const void *data, int count)
{
struct intel_data *intel = hu->priv;
if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
return -EUNATCH;
intel->rx_skb = h4_recv_buf(hu->hdev, intel->rx_skb, data, count,
intel_recv_pkts,
ARRAY_SIZE(intel_recv_pkts));
if (IS_ERR(intel->rx_skb)) {
int err = PTR_ERR(intel->rx_skb);
BT_ERR("%s: Frame reassembly failed (%d)", hu->hdev->name, err);
intel->rx_skb = NULL;
return err;
}
return count;
}
static int intel_enqueue(struct hci_uart *hu, struct sk_buff *skb)
{
struct intel_data *intel = hu->priv;
BT_DBG("hu %p skb %p", hu, skb);
skb_queue_tail(&intel->txq, skb);
return 0;
}
static struct sk_buff *intel_dequeue(struct hci_uart *hu)
{
struct intel_data *intel = hu->priv;
struct sk_buff *skb;
skb = skb_dequeue(&intel->txq);
if (!skb)
return skb;
if (test_bit(STATE_BOOTLOADER, &intel->flags) &&
(bt_cb(skb)->pkt_type == HCI_COMMAND_PKT)) {
struct hci_command_hdr *cmd = (void *)skb->data;
__u16 opcode = le16_to_cpu(cmd->opcode);
/* When the 0xfc01 command is issued to boot into
* the operational firmware, it will actually not
* send a command complete event. To keep the flow
* control working inject that event here.
*/
if (opcode == 0xfc01)
inject_cmd_complete(hu->hdev, opcode);
}
/* Prepend skb with frame type */
memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1);
return skb;
}
static const struct hci_uart_proto intel_proto = {
.id = HCI_UART_INTEL,
.name = "Intel",
.init_speed = 115200,
.oper_speed = 3000000,
.open = intel_open,
.close = intel_close,
.flush = intel_flush,
.setup = intel_setup,
.set_baudrate = intel_set_baudrate,
.recv = intel_recv,
.enqueue = intel_enqueue,
.dequeue = intel_dequeue,
};
#ifdef CONFIG_ACPI
static const struct acpi_device_id intel_acpi_match[] = {
{ "INT33E1", 0 },
{ },
};
MODULE_DEVICE_TABLE(acpi, intel_acpi_match);
static int intel_acpi_probe(struct intel_device *idev)
{
const struct acpi_device_id *id;
id = acpi_match_device(intel_acpi_match, &idev->pdev->dev);
if (!id)
return -ENODEV;
return 0;
}
#else
static int intel_acpi_probe(struct intel_device *idev)
{
return -ENODEV;
}
#endif
static int intel_probe(struct platform_device *pdev)
{
struct intel_device *idev;
idev = devm_kzalloc(&pdev->dev, sizeof(*idev), GFP_KERNEL);
if (!idev)
return -ENOMEM;
idev->pdev = pdev;
if (ACPI_HANDLE(&pdev->dev)) {
int err = intel_acpi_probe(idev);
if (err)
return err;
} else {
return -ENODEV;
}
idev->reset = devm_gpiod_get_optional(&pdev->dev, "reset",
GPIOD_OUT_LOW);
if (IS_ERR(idev->reset)) {
dev_err(&pdev->dev, "Unable to retrieve gpio\n");
return PTR_ERR(idev->reset);
}
platform_set_drvdata(pdev, idev);
/* Place this instance on the device list */
spin_lock(&intel_device_list_lock);
list_add_tail(&idev->list, &intel_device_list);
spin_unlock(&intel_device_list_lock);
dev_info(&pdev->dev, "registered.\n");
return 0;
}
static int intel_remove(struct platform_device *pdev)
{
struct intel_device *idev = platform_get_drvdata(pdev);
spin_lock(&intel_device_list_lock);
list_del(&idev->list);
spin_unlock(&intel_device_list_lock);
dev_info(&pdev->dev, "unregistered.\n");
return 0;
}
static struct platform_driver intel_driver = {
.probe = intel_probe,
.remove = intel_remove,
.driver = {
.name = "hci_intel",
.acpi_match_table = ACPI_PTR(intel_acpi_match),
},
};
int __init intel_init(void)
{
platform_driver_register(&intel_driver);
return hci_uart_register_proto(&intel_proto);
}
int __exit intel_deinit(void)
{
platform_driver_unregister(&intel_driver);
return hci_uart_unregister_proto(&intel_proto);
}