1381 lines
31 KiB
C
1381 lines
31 KiB
C
/*
|
|
*
|
|
* Bluetooth HCI UART driver 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/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/firmware.h>
|
|
#include <linux/module.h>
|
|
#include <linux/acpi.h>
|
|
#include <linux/of.h>
|
|
#include <linux/property.h>
|
|
#include <linux/platform_data/x86/apple.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/gpio/consumer.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/dmi.h>
|
|
#include <linux/pm_runtime.h>
|
|
#include <linux/serdev.h>
|
|
|
|
#include <net/bluetooth/bluetooth.h>
|
|
#include <net/bluetooth/hci_core.h>
|
|
|
|
#include "btbcm.h"
|
|
#include "hci_uart.h"
|
|
|
|
#define BCM_NULL_PKT 0x00
|
|
#define BCM_NULL_SIZE 0
|
|
|
|
#define BCM_LM_DIAG_PKT 0x07
|
|
#define BCM_LM_DIAG_SIZE 63
|
|
|
|
#define BCM_TYPE49_PKT 0x31
|
|
#define BCM_TYPE49_SIZE 0
|
|
|
|
#define BCM_TYPE52_PKT 0x34
|
|
#define BCM_TYPE52_SIZE 0
|
|
|
|
#define BCM_AUTOSUSPEND_DELAY 5000 /* default autosleep delay */
|
|
|
|
/**
|
|
* struct bcm_device - device driver resources
|
|
* @serdev_hu: HCI UART controller struct
|
|
* @list: bcm_device_list node
|
|
* @dev: physical UART slave
|
|
* @name: device name logged by bt_dev_*() functions
|
|
* @device_wakeup: BT_WAKE pin,
|
|
* assert = Bluetooth device must wake up or remain awake,
|
|
* deassert = Bluetooth device may sleep when sleep criteria are met
|
|
* @shutdown: BT_REG_ON pin,
|
|
* power up or power down Bluetooth device internal regulators
|
|
* @set_device_wakeup: callback to toggle BT_WAKE pin
|
|
* either by accessing @device_wakeup or by calling @btlp
|
|
* @set_shutdown: callback to toggle BT_REG_ON pin
|
|
* either by accessing @shutdown or by calling @btpu/@btpd
|
|
* @btlp: Apple ACPI method to toggle BT_WAKE pin ("Bluetooth Low Power")
|
|
* @btpu: Apple ACPI method to drive BT_REG_ON pin high ("Bluetooth Power Up")
|
|
* @btpd: Apple ACPI method to drive BT_REG_ON pin low ("Bluetooth Power Down")
|
|
* @clk: clock used by Bluetooth device
|
|
* @clk_enabled: whether @clk is prepared and enabled
|
|
* @init_speed: default baudrate of Bluetooth device;
|
|
* the host UART is initially set to this baudrate so that
|
|
* it can configure the Bluetooth device for @oper_speed
|
|
* @oper_speed: preferred baudrate of Bluetooth device;
|
|
* set to 0 if @init_speed is already the preferred baudrate
|
|
* @irq: interrupt triggered by HOST_WAKE_BT pin
|
|
* @irq_active_low: whether @irq is active low
|
|
* @hu: pointer to HCI UART controller struct,
|
|
* used to disable flow control during runtime suspend and system sleep
|
|
* @is_suspended: whether flow control is currently disabled
|
|
*/
|
|
struct bcm_device {
|
|
/* Must be the first member, hci_serdev.c expects this. */
|
|
struct hci_uart serdev_hu;
|
|
struct list_head list;
|
|
|
|
struct device *dev;
|
|
|
|
const char *name;
|
|
struct gpio_desc *device_wakeup;
|
|
struct gpio_desc *shutdown;
|
|
int (*set_device_wakeup)(struct bcm_device *, bool);
|
|
int (*set_shutdown)(struct bcm_device *, bool);
|
|
#ifdef CONFIG_ACPI
|
|
acpi_handle btlp, btpu, btpd;
|
|
int gpio_count;
|
|
int gpio_int_idx;
|
|
#endif
|
|
|
|
struct clk *clk;
|
|
bool clk_enabled;
|
|
|
|
u32 init_speed;
|
|
u32 oper_speed;
|
|
int irq;
|
|
bool irq_active_low;
|
|
|
|
#ifdef CONFIG_PM
|
|
struct hci_uart *hu;
|
|
bool is_suspended;
|
|
#endif
|
|
};
|
|
|
|
/* generic bcm uart resources */
|
|
struct bcm_data {
|
|
struct sk_buff *rx_skb;
|
|
struct sk_buff_head txq;
|
|
|
|
struct bcm_device *dev;
|
|
};
|
|
|
|
/* List of BCM BT UART devices */
|
|
static DEFINE_MUTEX(bcm_device_lock);
|
|
static LIST_HEAD(bcm_device_list);
|
|
|
|
static int irq_polarity = -1;
|
|
module_param(irq_polarity, int, 0444);
|
|
MODULE_PARM_DESC(irq_polarity, "IRQ polarity 0: active-high 1: active-low");
|
|
|
|
static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)
|
|
{
|
|
if (hu->serdev)
|
|
serdev_device_set_baudrate(hu->serdev, speed);
|
|
else
|
|
hci_uart_set_baudrate(hu, speed);
|
|
}
|
|
|
|
static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed)
|
|
{
|
|
struct hci_dev *hdev = hu->hdev;
|
|
struct sk_buff *skb;
|
|
struct bcm_update_uart_baud_rate param;
|
|
|
|
if (speed > 3000000) {
|
|
struct bcm_write_uart_clock_setting clock;
|
|
|
|
clock.type = BCM_UART_CLOCK_48MHZ;
|
|
|
|
bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type);
|
|
|
|
/* This Broadcom specific command changes the UART's controller
|
|
* clock for baud rate > 3000000.
|
|
*/
|
|
skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT);
|
|
if (IS_ERR(skb)) {
|
|
int err = PTR_ERR(skb);
|
|
bt_dev_err(hdev, "BCM: failed to write clock (%d)",
|
|
err);
|
|
return err;
|
|
}
|
|
|
|
kfree_skb(skb);
|
|
}
|
|
|
|
bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed);
|
|
|
|
param.zero = cpu_to_le16(0);
|
|
param.baud_rate = cpu_to_le32(speed);
|
|
|
|
/* This Broadcom specific command changes the UART's controller baud
|
|
* rate.
|
|
*/
|
|
skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), ¶m,
|
|
HCI_INIT_TIMEOUT);
|
|
if (IS_ERR(skb)) {
|
|
int err = PTR_ERR(skb);
|
|
bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)",
|
|
err);
|
|
return err;
|
|
}
|
|
|
|
kfree_skb(skb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* bcm_device_exists should be protected by bcm_device_lock */
|
|
static bool bcm_device_exists(struct bcm_device *device)
|
|
{
|
|
struct list_head *p;
|
|
|
|
#ifdef CONFIG_PM
|
|
/* Devices using serdev always exist */
|
|
if (device && device->hu && device->hu->serdev)
|
|
return true;
|
|
#endif
|
|
|
|
list_for_each(p, &bcm_device_list) {
|
|
struct bcm_device *dev = list_entry(p, struct bcm_device, list);
|
|
|
|
if (device == dev)
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static int bcm_gpio_set_power(struct bcm_device *dev, bool powered)
|
|
{
|
|
int err;
|
|
|
|
if (powered && !IS_ERR(dev->clk) && !dev->clk_enabled) {
|
|
err = clk_prepare_enable(dev->clk);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
err = dev->set_shutdown(dev, powered);
|
|
if (err)
|
|
goto err_clk_disable;
|
|
|
|
err = dev->set_device_wakeup(dev, powered);
|
|
if (err)
|
|
goto err_revert_shutdown;
|
|
|
|
if (!powered && !IS_ERR(dev->clk) && dev->clk_enabled)
|
|
clk_disable_unprepare(dev->clk);
|
|
|
|
dev->clk_enabled = powered;
|
|
|
|
return 0;
|
|
|
|
err_revert_shutdown:
|
|
dev->set_shutdown(dev, !powered);
|
|
err_clk_disable:
|
|
if (powered && !IS_ERR(dev->clk) && !dev->clk_enabled)
|
|
clk_disable_unprepare(dev->clk);
|
|
return err;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static irqreturn_t bcm_host_wake(int irq, void *data)
|
|
{
|
|
struct bcm_device *bdev = data;
|
|
|
|
bt_dev_dbg(bdev, "Host wake IRQ");
|
|
|
|
pm_runtime_get(bdev->dev);
|
|
pm_runtime_mark_last_busy(bdev->dev);
|
|
pm_runtime_put_autosuspend(bdev->dev);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int bcm_request_irq(struct bcm_data *bcm)
|
|
{
|
|
struct bcm_device *bdev = bcm->dev;
|
|
int err;
|
|
|
|
mutex_lock(&bcm_device_lock);
|
|
if (!bcm_device_exists(bdev)) {
|
|
err = -ENODEV;
|
|
goto unlock;
|
|
}
|
|
|
|
if (bdev->irq <= 0) {
|
|
err = -EOPNOTSUPP;
|
|
goto unlock;
|
|
}
|
|
|
|
err = devm_request_irq(bdev->dev, bdev->irq, bcm_host_wake,
|
|
bdev->irq_active_low ? IRQF_TRIGGER_FALLING :
|
|
IRQF_TRIGGER_RISING,
|
|
"host_wake", bdev);
|
|
if (err) {
|
|
bdev->irq = err;
|
|
goto unlock;
|
|
}
|
|
|
|
device_init_wakeup(bdev->dev, true);
|
|
|
|
pm_runtime_set_autosuspend_delay(bdev->dev,
|
|
BCM_AUTOSUSPEND_DELAY);
|
|
pm_runtime_use_autosuspend(bdev->dev);
|
|
pm_runtime_set_active(bdev->dev);
|
|
pm_runtime_enable(bdev->dev);
|
|
|
|
unlock:
|
|
mutex_unlock(&bcm_device_lock);
|
|
|
|
return err;
|
|
}
|
|
|
|
static const struct bcm_set_sleep_mode default_sleep_params = {
|
|
.sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */
|
|
.idle_host = 2, /* idle threshold HOST, in 300ms */
|
|
.idle_dev = 2, /* idle threshold device, in 300ms */
|
|
.bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */
|
|
.host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */
|
|
.allow_host_sleep = 1, /* Allow host sleep in SCO flag */
|
|
.combine_modes = 1, /* Combine sleep and LPM flag */
|
|
.tristate_control = 0, /* Allow tri-state control of UART tx flag */
|
|
/* Irrelevant USB flags */
|
|
.usb_auto_sleep = 0,
|
|
.usb_resume_timeout = 0,
|
|
.break_to_host = 0,
|
|
.pulsed_host_wake = 1,
|
|
};
|
|
|
|
static int bcm_setup_sleep(struct hci_uart *hu)
|
|
{
|
|
struct bcm_data *bcm = hu->priv;
|
|
struct sk_buff *skb;
|
|
struct bcm_set_sleep_mode sleep_params = default_sleep_params;
|
|
|
|
sleep_params.host_wake_active = !bcm->dev->irq_active_low;
|
|
|
|
skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params),
|
|
&sleep_params, HCI_INIT_TIMEOUT);
|
|
if (IS_ERR(skb)) {
|
|
int err = PTR_ERR(skb);
|
|
bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err);
|
|
return err;
|
|
}
|
|
kfree_skb(skb);
|
|
|
|
bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded");
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; }
|
|
static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; }
|
|
#endif
|
|
|
|
static int bcm_set_diag(struct hci_dev *hdev, bool enable)
|
|
{
|
|
struct hci_uart *hu = hci_get_drvdata(hdev);
|
|
struct bcm_data *bcm = hu->priv;
|
|
struct sk_buff *skb;
|
|
|
|
if (!test_bit(HCI_RUNNING, &hdev->flags))
|
|
return -ENETDOWN;
|
|
|
|
skb = bt_skb_alloc(3, GFP_KERNEL);
|
|
if (!skb)
|
|
return -ENOMEM;
|
|
|
|
skb_put_u8(skb, BCM_LM_DIAG_PKT);
|
|
skb_put_u8(skb, 0xf0);
|
|
skb_put_u8(skb, enable);
|
|
|
|
skb_queue_tail(&bcm->txq, skb);
|
|
hci_uart_tx_wakeup(hu);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bcm_open(struct hci_uart *hu)
|
|
{
|
|
struct bcm_data *bcm;
|
|
struct list_head *p;
|
|
int err;
|
|
|
|
bt_dev_dbg(hu->hdev, "hu %p", hu);
|
|
|
|
if (!hci_uart_has_flow_control(hu))
|
|
return -EOPNOTSUPP;
|
|
|
|
bcm = kzalloc(sizeof(*bcm), GFP_KERNEL);
|
|
if (!bcm)
|
|
return -ENOMEM;
|
|
|
|
skb_queue_head_init(&bcm->txq);
|
|
|
|
hu->priv = bcm;
|
|
|
|
mutex_lock(&bcm_device_lock);
|
|
|
|
if (hu->serdev) {
|
|
bcm->dev = serdev_device_get_drvdata(hu->serdev);
|
|
goto out;
|
|
}
|
|
|
|
if (!hu->tty->dev)
|
|
goto out;
|
|
|
|
list_for_each(p, &bcm_device_list) {
|
|
struct bcm_device *dev = list_entry(p, struct bcm_device, list);
|
|
|
|
/* Retrieve saved bcm_device based on parent of the
|
|
* platform device (saved during device probe) and
|
|
* parent of tty device used by hci_uart
|
|
*/
|
|
if (hu->tty->dev->parent == dev->dev->parent) {
|
|
bcm->dev = dev;
|
|
#ifdef CONFIG_PM
|
|
dev->hu = hu;
|
|
#endif
|
|
break;
|
|
}
|
|
}
|
|
|
|
out:
|
|
if (bcm->dev) {
|
|
hu->init_speed = bcm->dev->init_speed;
|
|
hu->oper_speed = bcm->dev->oper_speed;
|
|
err = bcm_gpio_set_power(bcm->dev, true);
|
|
if (err)
|
|
goto err_unset_hu;
|
|
}
|
|
|
|
mutex_unlock(&bcm_device_lock);
|
|
return 0;
|
|
|
|
err_unset_hu:
|
|
#ifdef CONFIG_PM
|
|
if (!hu->serdev)
|
|
bcm->dev->hu = NULL;
|
|
#endif
|
|
mutex_unlock(&bcm_device_lock);
|
|
hu->priv = NULL;
|
|
kfree(bcm);
|
|
return err;
|
|
}
|
|
|
|
static int bcm_close(struct hci_uart *hu)
|
|
{
|
|
struct bcm_data *bcm = hu->priv;
|
|
struct bcm_device *bdev = NULL;
|
|
int err;
|
|
|
|
bt_dev_dbg(hu->hdev, "hu %p", hu);
|
|
|
|
/* Protect bcm->dev against removal of the device or driver */
|
|
mutex_lock(&bcm_device_lock);
|
|
|
|
if (hu->serdev) {
|
|
bdev = serdev_device_get_drvdata(hu->serdev);
|
|
} else if (bcm_device_exists(bcm->dev)) {
|
|
bdev = bcm->dev;
|
|
#ifdef CONFIG_PM
|
|
bdev->hu = NULL;
|
|
#endif
|
|
}
|
|
|
|
if (bdev) {
|
|
if (IS_ENABLED(CONFIG_PM) && bdev->irq > 0) {
|
|
devm_free_irq(bdev->dev, bdev->irq, bdev);
|
|
device_init_wakeup(bdev->dev, false);
|
|
pm_runtime_disable(bdev->dev);
|
|
}
|
|
|
|
err = bcm_gpio_set_power(bdev, false);
|
|
if (err)
|
|
bt_dev_err(hu->hdev, "Failed to power down");
|
|
else
|
|
pm_runtime_set_suspended(bdev->dev);
|
|
}
|
|
mutex_unlock(&bcm_device_lock);
|
|
|
|
skb_queue_purge(&bcm->txq);
|
|
kfree_skb(bcm->rx_skb);
|
|
kfree(bcm);
|
|
|
|
hu->priv = NULL;
|
|
return 0;
|
|
}
|
|
|
|
static int bcm_flush(struct hci_uart *hu)
|
|
{
|
|
struct bcm_data *bcm = hu->priv;
|
|
|
|
bt_dev_dbg(hu->hdev, "hu %p", hu);
|
|
|
|
skb_queue_purge(&bcm->txq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bcm_setup(struct hci_uart *hu)
|
|
{
|
|
struct bcm_data *bcm = hu->priv;
|
|
char fw_name[64];
|
|
const struct firmware *fw;
|
|
unsigned int speed;
|
|
int err;
|
|
|
|
bt_dev_dbg(hu->hdev, "hu %p", hu);
|
|
|
|
hu->hdev->set_diag = bcm_set_diag;
|
|
hu->hdev->set_bdaddr = btbcm_set_bdaddr;
|
|
|
|
err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name), false);
|
|
if (err)
|
|
return err;
|
|
|
|
err = request_firmware(&fw, fw_name, &hu->hdev->dev);
|
|
if (err < 0) {
|
|
bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name);
|
|
return 0;
|
|
}
|
|
|
|
err = btbcm_patchram(hu->hdev, fw);
|
|
if (err) {
|
|
bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err);
|
|
goto finalize;
|
|
}
|
|
|
|
/* Init speed if any */
|
|
if (hu->init_speed)
|
|
speed = hu->init_speed;
|
|
else if (hu->proto->init_speed)
|
|
speed = hu->proto->init_speed;
|
|
else
|
|
speed = 0;
|
|
|
|
if (speed)
|
|
host_set_baudrate(hu, speed);
|
|
|
|
/* Operational speed if any */
|
|
if (hu->oper_speed)
|
|
speed = hu->oper_speed;
|
|
else if (hu->proto->oper_speed)
|
|
speed = hu->proto->oper_speed;
|
|
else
|
|
speed = 0;
|
|
|
|
if (speed) {
|
|
err = bcm_set_baudrate(hu, speed);
|
|
if (!err)
|
|
host_set_baudrate(hu, speed);
|
|
}
|
|
|
|
finalize:
|
|
release_firmware(fw);
|
|
|
|
err = btbcm_finalize(hu->hdev);
|
|
if (err)
|
|
return err;
|
|
|
|
if (!bcm_request_irq(bcm))
|
|
err = bcm_setup_sleep(hu);
|
|
|
|
return err;
|
|
}
|
|
|
|
#define BCM_RECV_LM_DIAG \
|
|
.type = BCM_LM_DIAG_PKT, \
|
|
.hlen = BCM_LM_DIAG_SIZE, \
|
|
.loff = 0, \
|
|
.lsize = 0, \
|
|
.maxlen = BCM_LM_DIAG_SIZE
|
|
|
|
#define BCM_RECV_NULL \
|
|
.type = BCM_NULL_PKT, \
|
|
.hlen = BCM_NULL_SIZE, \
|
|
.loff = 0, \
|
|
.lsize = 0, \
|
|
.maxlen = BCM_NULL_SIZE
|
|
|
|
#define BCM_RECV_TYPE49 \
|
|
.type = BCM_TYPE49_PKT, \
|
|
.hlen = BCM_TYPE49_SIZE, \
|
|
.loff = 0, \
|
|
.lsize = 0, \
|
|
.maxlen = BCM_TYPE49_SIZE
|
|
|
|
#define BCM_RECV_TYPE52 \
|
|
.type = BCM_TYPE52_PKT, \
|
|
.hlen = BCM_TYPE52_SIZE, \
|
|
.loff = 0, \
|
|
.lsize = 0, \
|
|
.maxlen = BCM_TYPE52_SIZE
|
|
|
|
static const struct h4_recv_pkt bcm_recv_pkts[] = {
|
|
{ H4_RECV_ACL, .recv = hci_recv_frame },
|
|
{ H4_RECV_SCO, .recv = hci_recv_frame },
|
|
{ H4_RECV_EVENT, .recv = hci_recv_frame },
|
|
{ BCM_RECV_LM_DIAG, .recv = hci_recv_diag },
|
|
{ BCM_RECV_NULL, .recv = hci_recv_diag },
|
|
{ BCM_RECV_TYPE49, .recv = hci_recv_diag },
|
|
{ BCM_RECV_TYPE52, .recv = hci_recv_diag },
|
|
};
|
|
|
|
static int bcm_recv(struct hci_uart *hu, const void *data, int count)
|
|
{
|
|
struct bcm_data *bcm = hu->priv;
|
|
|
|
if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
|
|
return -EUNATCH;
|
|
|
|
bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count,
|
|
bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
|
|
if (IS_ERR(bcm->rx_skb)) {
|
|
int err = PTR_ERR(bcm->rx_skb);
|
|
bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
|
|
bcm->rx_skb = NULL;
|
|
return err;
|
|
} else if (!bcm->rx_skb) {
|
|
/* Delay auto-suspend when receiving completed packet */
|
|
mutex_lock(&bcm_device_lock);
|
|
if (bcm->dev && bcm_device_exists(bcm->dev)) {
|
|
pm_runtime_get(bcm->dev->dev);
|
|
pm_runtime_mark_last_busy(bcm->dev->dev);
|
|
pm_runtime_put_autosuspend(bcm->dev->dev);
|
|
}
|
|
mutex_unlock(&bcm_device_lock);
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb)
|
|
{
|
|
struct bcm_data *bcm = hu->priv;
|
|
|
|
bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb);
|
|
|
|
/* Prepend skb with frame type */
|
|
memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
|
|
skb_queue_tail(&bcm->txq, skb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
|
|
{
|
|
struct bcm_data *bcm = hu->priv;
|
|
struct sk_buff *skb = NULL;
|
|
struct bcm_device *bdev = NULL;
|
|
|
|
mutex_lock(&bcm_device_lock);
|
|
|
|
if (bcm_device_exists(bcm->dev)) {
|
|
bdev = bcm->dev;
|
|
pm_runtime_get_sync(bdev->dev);
|
|
/* Shall be resumed here */
|
|
}
|
|
|
|
skb = skb_dequeue(&bcm->txq);
|
|
|
|
if (bdev) {
|
|
pm_runtime_mark_last_busy(bdev->dev);
|
|
pm_runtime_put_autosuspend(bdev->dev);
|
|
}
|
|
|
|
mutex_unlock(&bcm_device_lock);
|
|
|
|
return skb;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int bcm_suspend_device(struct device *dev)
|
|
{
|
|
struct bcm_device *bdev = dev_get_drvdata(dev);
|
|
int err;
|
|
|
|
bt_dev_dbg(bdev, "");
|
|
|
|
if (!bdev->is_suspended && bdev->hu) {
|
|
hci_uart_set_flow_control(bdev->hu, true);
|
|
|
|
/* Once this returns, driver suspends BT via GPIO */
|
|
bdev->is_suspended = true;
|
|
}
|
|
|
|
/* Suspend the device */
|
|
err = bdev->set_device_wakeup(bdev, false);
|
|
if (err) {
|
|
if (bdev->is_suspended && bdev->hu) {
|
|
bdev->is_suspended = false;
|
|
hci_uart_set_flow_control(bdev->hu, false);
|
|
}
|
|
return -EBUSY;
|
|
}
|
|
|
|
bt_dev_dbg(bdev, "suspend, delaying 15 ms");
|
|
msleep(15);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bcm_resume_device(struct device *dev)
|
|
{
|
|
struct bcm_device *bdev = dev_get_drvdata(dev);
|
|
int err;
|
|
|
|
bt_dev_dbg(bdev, "");
|
|
|
|
err = bdev->set_device_wakeup(bdev, true);
|
|
if (err) {
|
|
dev_err(dev, "Failed to power up\n");
|
|
return err;
|
|
}
|
|
|
|
bt_dev_dbg(bdev, "resume, delaying 15 ms");
|
|
msleep(15);
|
|
|
|
/* When this executes, the device has woken up already */
|
|
if (bdev->is_suspended && bdev->hu) {
|
|
bdev->is_suspended = false;
|
|
|
|
hci_uart_set_flow_control(bdev->hu, false);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
/* suspend callback */
|
|
static int bcm_suspend(struct device *dev)
|
|
{
|
|
struct bcm_device *bdev = dev_get_drvdata(dev);
|
|
int error;
|
|
|
|
bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended);
|
|
|
|
/*
|
|
* When used with a device instantiated as platform_device, bcm_suspend
|
|
* can be called at any time as long as the platform device is bound,
|
|
* so it should use bcm_device_lock to protect access to hci_uart
|
|
* and device_wake-up GPIO.
|
|
*/
|
|
mutex_lock(&bcm_device_lock);
|
|
|
|
if (!bdev->hu)
|
|
goto unlock;
|
|
|
|
if (pm_runtime_active(dev))
|
|
bcm_suspend_device(dev);
|
|
|
|
if (device_may_wakeup(dev) && bdev->irq > 0) {
|
|
error = enable_irq_wake(bdev->irq);
|
|
if (!error)
|
|
bt_dev_dbg(bdev, "BCM irq: enabled");
|
|
}
|
|
|
|
unlock:
|
|
mutex_unlock(&bcm_device_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* resume callback */
|
|
static int bcm_resume(struct device *dev)
|
|
{
|
|
struct bcm_device *bdev = dev_get_drvdata(dev);
|
|
int err = 0;
|
|
|
|
bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended);
|
|
|
|
/*
|
|
* When used with a device instantiated as platform_device, bcm_resume
|
|
* can be called at any time as long as platform device is bound,
|
|
* so it should use bcm_device_lock to protect access to hci_uart
|
|
* and device_wake-up GPIO.
|
|
*/
|
|
mutex_lock(&bcm_device_lock);
|
|
|
|
if (!bdev->hu)
|
|
goto unlock;
|
|
|
|
if (device_may_wakeup(dev) && bdev->irq > 0) {
|
|
disable_irq_wake(bdev->irq);
|
|
bt_dev_dbg(bdev, "BCM irq: disabled");
|
|
}
|
|
|
|
err = bcm_resume_device(dev);
|
|
|
|
unlock:
|
|
mutex_unlock(&bcm_device_lock);
|
|
|
|
if (!err) {
|
|
pm_runtime_disable(dev);
|
|
pm_runtime_set_active(dev);
|
|
pm_runtime_enable(dev);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static const struct acpi_gpio_params first_gpio = { 0, 0, false };
|
|
static const struct acpi_gpio_params second_gpio = { 1, 0, false };
|
|
static const struct acpi_gpio_params third_gpio = { 2, 0, false };
|
|
|
|
static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = {
|
|
{ "device-wakeup-gpios", &first_gpio, 1 },
|
|
{ "shutdown-gpios", &second_gpio, 1 },
|
|
{ "host-wakeup-gpios", &third_gpio, 1 },
|
|
{ },
|
|
};
|
|
|
|
static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = {
|
|
{ "host-wakeup-gpios", &first_gpio, 1 },
|
|
{ "device-wakeup-gpios", &second_gpio, 1 },
|
|
{ "shutdown-gpios", &third_gpio, 1 },
|
|
{ },
|
|
};
|
|
|
|
/* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */
|
|
static const struct dmi_system_id bcm_broken_irq_dmi_table[] = {
|
|
{
|
|
.ident = "Meegopad T08",
|
|
.matches = {
|
|
DMI_EXACT_MATCH(DMI_BOARD_VENDOR,
|
|
"To be filled by OEM."),
|
|
DMI_EXACT_MATCH(DMI_BOARD_NAME, "T3 MRD"),
|
|
DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V1.1"),
|
|
},
|
|
},
|
|
{ }
|
|
};
|
|
|
|
#ifdef CONFIG_ACPI
|
|
static int bcm_resource(struct acpi_resource *ares, void *data)
|
|
{
|
|
struct bcm_device *dev = data;
|
|
struct acpi_resource_extended_irq *irq;
|
|
struct acpi_resource_gpio *gpio;
|
|
struct acpi_resource_uart_serialbus *sb;
|
|
|
|
switch (ares->type) {
|
|
case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
|
|
irq = &ares->data.extended_irq;
|
|
if (irq->polarity != ACPI_ACTIVE_LOW)
|
|
dev_info(dev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n");
|
|
dev->irq_active_low = true;
|
|
break;
|
|
|
|
case ACPI_RESOURCE_TYPE_GPIO:
|
|
gpio = &ares->data.gpio;
|
|
if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) {
|
|
dev->gpio_int_idx = dev->gpio_count;
|
|
dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW;
|
|
}
|
|
dev->gpio_count++;
|
|
break;
|
|
|
|
case ACPI_RESOURCE_TYPE_SERIAL_BUS:
|
|
sb = &ares->data.uart_serial_bus;
|
|
if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) {
|
|
dev->init_speed = sb->default_baud_rate;
|
|
dev->oper_speed = 4000000;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake)
|
|
{
|
|
if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake)))
|
|
return -EIO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered)
|
|
{
|
|
if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd,
|
|
NULL, NULL, NULL)))
|
|
return -EIO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bcm_apple_get_resources(struct bcm_device *dev)
|
|
{
|
|
struct acpi_device *adev = ACPI_COMPANION(dev->dev);
|
|
const union acpi_object *obj;
|
|
|
|
if (!adev ||
|
|
ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) ||
|
|
ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) ||
|
|
ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd)))
|
|
return -ENODEV;
|
|
|
|
if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) &&
|
|
obj->buffer.length == 8)
|
|
dev->init_speed = *(u64 *)obj->buffer.pointer;
|
|
|
|
dev->set_device_wakeup = bcm_apple_set_device_wakeup;
|
|
dev->set_shutdown = bcm_apple_set_shutdown;
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
static inline int bcm_apple_get_resources(struct bcm_device *dev)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
#endif /* CONFIG_ACPI */
|
|
|
|
static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake)
|
|
{
|
|
gpiod_set_value_cansleep(dev->device_wakeup, awake);
|
|
return 0;
|
|
}
|
|
|
|
static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered)
|
|
{
|
|
gpiod_set_value_cansleep(dev->shutdown, powered);
|
|
return 0;
|
|
}
|
|
|
|
static int bcm_get_resources(struct bcm_device *dev)
|
|
{
|
|
const struct dmi_system_id *dmi_id;
|
|
|
|
dev->name = dev_name(dev->dev);
|
|
|
|
if (x86_apple_machine && !bcm_apple_get_resources(dev))
|
|
return 0;
|
|
|
|
dev->clk = devm_clk_get(dev->dev, NULL);
|
|
|
|
/* Handle deferred probing */
|
|
if (dev->clk == ERR_PTR(-EPROBE_DEFER))
|
|
return PTR_ERR(dev->clk);
|
|
|
|
dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup",
|
|
GPIOD_OUT_LOW);
|
|
if (IS_ERR(dev->device_wakeup))
|
|
return PTR_ERR(dev->device_wakeup);
|
|
|
|
dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown",
|
|
GPIOD_OUT_LOW);
|
|
if (IS_ERR(dev->shutdown))
|
|
return PTR_ERR(dev->shutdown);
|
|
|
|
dev->set_device_wakeup = bcm_gpio_set_device_wakeup;
|
|
dev->set_shutdown = bcm_gpio_set_shutdown;
|
|
|
|
/* IRQ can be declared in ACPI table as Interrupt or GpioInt */
|
|
if (dev->irq <= 0) {
|
|
struct gpio_desc *gpio;
|
|
|
|
gpio = devm_gpiod_get_optional(dev->dev, "host-wakeup",
|
|
GPIOD_IN);
|
|
if (IS_ERR(gpio))
|
|
return PTR_ERR(gpio);
|
|
|
|
dev->irq = gpiod_to_irq(gpio);
|
|
}
|
|
|
|
dmi_id = dmi_first_match(bcm_broken_irq_dmi_table);
|
|
if (dmi_id) {
|
|
dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n",
|
|
dmi_id->ident);
|
|
dev->irq = 0;
|
|
}
|
|
|
|
dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_ACPI
|
|
static int bcm_acpi_probe(struct bcm_device *dev)
|
|
{
|
|
LIST_HEAD(resources);
|
|
const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios;
|
|
struct resource_entry *entry;
|
|
int ret;
|
|
|
|
/* Retrieve UART ACPI info */
|
|
dev->gpio_int_idx = -1;
|
|
ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev),
|
|
&resources, bcm_resource, dev);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
resource_list_for_each_entry(entry, &resources) {
|
|
if (resource_type(entry->res) == IORESOURCE_IRQ) {
|
|
dev->irq = entry->res->start;
|
|
break;
|
|
}
|
|
}
|
|
acpi_dev_free_resource_list(&resources);
|
|
|
|
/* If the DSDT uses an Interrupt resource for the IRQ, then there are
|
|
* only 2 GPIO resources, we use the irq-last mapping for this, since
|
|
* we already have an irq the 3th / last mapping will not be used.
|
|
*/
|
|
if (dev->irq)
|
|
gpio_mapping = acpi_bcm_int_last_gpios;
|
|
else if (dev->gpio_int_idx == 0)
|
|
gpio_mapping = acpi_bcm_int_first_gpios;
|
|
else if (dev->gpio_int_idx == 2)
|
|
gpio_mapping = acpi_bcm_int_last_gpios;
|
|
else
|
|
dev_warn(dev->dev, "Unexpected ACPI gpio_int_idx: %d\n",
|
|
dev->gpio_int_idx);
|
|
|
|
/* Warn if our expectations are not met. */
|
|
if (dev->gpio_count != (dev->irq ? 2 : 3))
|
|
dev_warn(dev->dev, "Unexpected number of ACPI GPIOs: %d\n",
|
|
dev->gpio_count);
|
|
|
|
ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (irq_polarity != -1) {
|
|
dev->irq_active_low = irq_polarity;
|
|
dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n",
|
|
dev->irq_active_low ? "low" : "high");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
static int bcm_acpi_probe(struct bcm_device *dev)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
#endif /* CONFIG_ACPI */
|
|
|
|
static int bcm_of_probe(struct bcm_device *bdev)
|
|
{
|
|
device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed);
|
|
return 0;
|
|
}
|
|
|
|
static int bcm_probe(struct platform_device *pdev)
|
|
{
|
|
struct bcm_device *dev;
|
|
int ret;
|
|
|
|
dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
|
|
if (!dev)
|
|
return -ENOMEM;
|
|
|
|
dev->dev = &pdev->dev;
|
|
dev->irq = platform_get_irq(pdev, 0);
|
|
|
|
if (has_acpi_companion(&pdev->dev)) {
|
|
ret = bcm_acpi_probe(dev);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
ret = bcm_get_resources(dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
platform_set_drvdata(pdev, dev);
|
|
|
|
dev_info(&pdev->dev, "%s device registered.\n", dev->name);
|
|
|
|
/* Place this instance on the device list */
|
|
mutex_lock(&bcm_device_lock);
|
|
list_add_tail(&dev->list, &bcm_device_list);
|
|
mutex_unlock(&bcm_device_lock);
|
|
|
|
ret = bcm_gpio_set_power(dev, false);
|
|
if (ret)
|
|
dev_err(&pdev->dev, "Failed to power down\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bcm_remove(struct platform_device *pdev)
|
|
{
|
|
struct bcm_device *dev = platform_get_drvdata(pdev);
|
|
|
|
mutex_lock(&bcm_device_lock);
|
|
list_del(&dev->list);
|
|
mutex_unlock(&bcm_device_lock);
|
|
|
|
dev_info(&pdev->dev, "%s device unregistered.\n", dev->name);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct hci_uart_proto bcm_proto = {
|
|
.id = HCI_UART_BCM,
|
|
.name = "Broadcom",
|
|
.manufacturer = 15,
|
|
.init_speed = 115200,
|
|
.open = bcm_open,
|
|
.close = bcm_close,
|
|
.flush = bcm_flush,
|
|
.setup = bcm_setup,
|
|
.set_baudrate = bcm_set_baudrate,
|
|
.recv = bcm_recv,
|
|
.enqueue = bcm_enqueue,
|
|
.dequeue = bcm_dequeue,
|
|
};
|
|
|
|
#ifdef CONFIG_ACPI
|
|
static const struct acpi_device_id bcm_acpi_match[] = {
|
|
{ "BCM2E00" },
|
|
{ "BCM2E01" },
|
|
{ "BCM2E02" },
|
|
{ "BCM2E03" },
|
|
{ "BCM2E04" },
|
|
{ "BCM2E05" },
|
|
{ "BCM2E06" },
|
|
{ "BCM2E07" },
|
|
{ "BCM2E08" },
|
|
{ "BCM2E09" },
|
|
{ "BCM2E0A" },
|
|
{ "BCM2E0B" },
|
|
{ "BCM2E0C" },
|
|
{ "BCM2E0D" },
|
|
{ "BCM2E0E" },
|
|
{ "BCM2E0F" },
|
|
{ "BCM2E10" },
|
|
{ "BCM2E11" },
|
|
{ "BCM2E12" },
|
|
{ "BCM2E13" },
|
|
{ "BCM2E14" },
|
|
{ "BCM2E15" },
|
|
{ "BCM2E16" },
|
|
{ "BCM2E17" },
|
|
{ "BCM2E18" },
|
|
{ "BCM2E19" },
|
|
{ "BCM2E1A" },
|
|
{ "BCM2E1B" },
|
|
{ "BCM2E1C" },
|
|
{ "BCM2E1D" },
|
|
{ "BCM2E1F" },
|
|
{ "BCM2E20" },
|
|
{ "BCM2E21" },
|
|
{ "BCM2E22" },
|
|
{ "BCM2E23" },
|
|
{ "BCM2E24" },
|
|
{ "BCM2E25" },
|
|
{ "BCM2E26" },
|
|
{ "BCM2E27" },
|
|
{ "BCM2E28" },
|
|
{ "BCM2E29" },
|
|
{ "BCM2E2A" },
|
|
{ "BCM2E2B" },
|
|
{ "BCM2E2C" },
|
|
{ "BCM2E2D" },
|
|
{ "BCM2E2E" },
|
|
{ "BCM2E2F" },
|
|
{ "BCM2E30" },
|
|
{ "BCM2E31" },
|
|
{ "BCM2E32" },
|
|
{ "BCM2E33" },
|
|
{ "BCM2E34" },
|
|
{ "BCM2E35" },
|
|
{ "BCM2E36" },
|
|
{ "BCM2E37" },
|
|
{ "BCM2E38" },
|
|
{ "BCM2E39" },
|
|
{ "BCM2E3A" },
|
|
{ "BCM2E3B" },
|
|
{ "BCM2E3C" },
|
|
{ "BCM2E3D" },
|
|
{ "BCM2E3E" },
|
|
{ "BCM2E3F" },
|
|
{ "BCM2E40" },
|
|
{ "BCM2E41" },
|
|
{ "BCM2E42" },
|
|
{ "BCM2E43" },
|
|
{ "BCM2E44" },
|
|
{ "BCM2E45" },
|
|
{ "BCM2E46" },
|
|
{ "BCM2E47" },
|
|
{ "BCM2E48" },
|
|
{ "BCM2E49" },
|
|
{ "BCM2E4A" },
|
|
{ "BCM2E4B" },
|
|
{ "BCM2E4C" },
|
|
{ "BCM2E4D" },
|
|
{ "BCM2E4E" },
|
|
{ "BCM2E4F" },
|
|
{ "BCM2E50" },
|
|
{ "BCM2E51" },
|
|
{ "BCM2E52" },
|
|
{ "BCM2E53" },
|
|
{ "BCM2E54" },
|
|
{ "BCM2E55" },
|
|
{ "BCM2E56" },
|
|
{ "BCM2E57" },
|
|
{ "BCM2E58" },
|
|
{ "BCM2E59" },
|
|
{ "BCM2E5A" },
|
|
{ "BCM2E5B" },
|
|
{ "BCM2E5C" },
|
|
{ "BCM2E5D" },
|
|
{ "BCM2E5E" },
|
|
{ "BCM2E5F" },
|
|
{ "BCM2E60" },
|
|
{ "BCM2E61" },
|
|
{ "BCM2E62" },
|
|
{ "BCM2E63" },
|
|
{ "BCM2E64" },
|
|
{ "BCM2E65" },
|
|
{ "BCM2E66" },
|
|
{ "BCM2E67" },
|
|
{ "BCM2E68" },
|
|
{ "BCM2E69" },
|
|
{ "BCM2E6B" },
|
|
{ "BCM2E6D" },
|
|
{ "BCM2E6E" },
|
|
{ "BCM2E6F" },
|
|
{ "BCM2E70" },
|
|
{ "BCM2E71" },
|
|
{ "BCM2E72" },
|
|
{ "BCM2E73" },
|
|
{ "BCM2E74" },
|
|
{ "BCM2E75" },
|
|
{ "BCM2E76" },
|
|
{ "BCM2E77" },
|
|
{ "BCM2E78" },
|
|
{ "BCM2E79" },
|
|
{ "BCM2E7A" },
|
|
{ "BCM2E7B" },
|
|
{ "BCM2E7C" },
|
|
{ "BCM2E7D" },
|
|
{ "BCM2E7E" },
|
|
{ "BCM2E7F" },
|
|
{ "BCM2E80" },
|
|
{ "BCM2E81" },
|
|
{ "BCM2E82" },
|
|
{ "BCM2E83" },
|
|
{ "BCM2E84" },
|
|
{ "BCM2E85" },
|
|
{ "BCM2E86" },
|
|
{ "BCM2E87" },
|
|
{ "BCM2E88" },
|
|
{ "BCM2E89" },
|
|
{ "BCM2E8A" },
|
|
{ "BCM2E8B" },
|
|
{ "BCM2E8C" },
|
|
{ "BCM2E8D" },
|
|
{ "BCM2E8E" },
|
|
{ "BCM2E90" },
|
|
{ "BCM2E92" },
|
|
{ "BCM2E93" },
|
|
{ "BCM2E94" },
|
|
{ "BCM2E95" },
|
|
{ "BCM2E96" },
|
|
{ "BCM2E97" },
|
|
{ "BCM2E98" },
|
|
{ "BCM2E99" },
|
|
{ "BCM2E9A" },
|
|
{ "BCM2E9B" },
|
|
{ "BCM2E9C" },
|
|
{ "BCM2E9D" },
|
|
{ "BCM2EA0" },
|
|
{ "BCM2EA1" },
|
|
{ "BCM2EA2" },
|
|
{ "BCM2EA3" },
|
|
{ "BCM2EA4" },
|
|
{ "BCM2EA5" },
|
|
{ "BCM2EA6" },
|
|
{ "BCM2EA7" },
|
|
{ "BCM2EA8" },
|
|
{ "BCM2EA9" },
|
|
{ "BCM2EAA" },
|
|
{ "BCM2EAB" },
|
|
{ "BCM2EAC" },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, bcm_acpi_match);
|
|
#endif
|
|
|
|
/* suspend and resume callbacks */
|
|
static const struct dev_pm_ops bcm_pm_ops = {
|
|
SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume)
|
|
SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL)
|
|
};
|
|
|
|
static struct platform_driver bcm_driver = {
|
|
.probe = bcm_probe,
|
|
.remove = bcm_remove,
|
|
.driver = {
|
|
.name = "hci_bcm",
|
|
.acpi_match_table = ACPI_PTR(bcm_acpi_match),
|
|
.pm = &bcm_pm_ops,
|
|
},
|
|
};
|
|
|
|
static int bcm_serdev_probe(struct serdev_device *serdev)
|
|
{
|
|
struct bcm_device *bcmdev;
|
|
int err;
|
|
|
|
bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL);
|
|
if (!bcmdev)
|
|
return -ENOMEM;
|
|
|
|
bcmdev->dev = &serdev->dev;
|
|
#ifdef CONFIG_PM
|
|
bcmdev->hu = &bcmdev->serdev_hu;
|
|
#endif
|
|
bcmdev->serdev_hu.serdev = serdev;
|
|
serdev_device_set_drvdata(serdev, bcmdev);
|
|
|
|
if (has_acpi_companion(&serdev->dev))
|
|
err = bcm_acpi_probe(bcmdev);
|
|
else
|
|
err = bcm_of_probe(bcmdev);
|
|
if (err)
|
|
return err;
|
|
|
|
err = bcm_get_resources(bcmdev);
|
|
if (err)
|
|
return err;
|
|
|
|
if (!bcmdev->shutdown) {
|
|
dev_warn(&serdev->dev,
|
|
"No reset resource, using default baud rate\n");
|
|
bcmdev->oper_speed = bcmdev->init_speed;
|
|
}
|
|
|
|
err = bcm_gpio_set_power(bcmdev, false);
|
|
if (err)
|
|
dev_err(&serdev->dev, "Failed to power down\n");
|
|
|
|
return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto);
|
|
}
|
|
|
|
static void bcm_serdev_remove(struct serdev_device *serdev)
|
|
{
|
|
struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev);
|
|
|
|
hci_uart_unregister_device(&bcmdev->serdev_hu);
|
|
}
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id bcm_bluetooth_of_match[] = {
|
|
{ .compatible = "brcm,bcm43438-bt" },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match);
|
|
#endif
|
|
|
|
static struct serdev_device_driver bcm_serdev_driver = {
|
|
.probe = bcm_serdev_probe,
|
|
.remove = bcm_serdev_remove,
|
|
.driver = {
|
|
.name = "hci_uart_bcm",
|
|
.of_match_table = of_match_ptr(bcm_bluetooth_of_match),
|
|
.acpi_match_table = ACPI_PTR(bcm_acpi_match),
|
|
.pm = &bcm_pm_ops,
|
|
},
|
|
};
|
|
|
|
int __init bcm_init(void)
|
|
{
|
|
/* For now, we need to keep both platform device
|
|
* driver (ACPI generated) and serdev driver (DT).
|
|
*/
|
|
platform_driver_register(&bcm_driver);
|
|
serdev_device_driver_register(&bcm_serdev_driver);
|
|
|
|
return hci_uart_register_proto(&bcm_proto);
|
|
}
|
|
|
|
int __exit bcm_deinit(void)
|
|
{
|
|
platform_driver_unregister(&bcm_driver);
|
|
serdev_device_driver_unregister(&bcm_serdev_driver);
|
|
|
|
return hci_uart_unregister_proto(&bcm_proto);
|
|
}
|