1045 lines
24 KiB
C
1045 lines
24 KiB
C
/*
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*
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* Bluetooth HCI UART driver for Broadcom devices
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*
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* Copyright (C) 2015 Intel Corporation
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/skbuff.h>
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#include <linux/firmware.h>
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#include <linux/module.h>
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#include <linux/acpi.h>
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#include <linux/of.h>
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#include <linux/property.h>
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#include <linux/gpio/consumer.h>
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#include <linux/tty.h>
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#include <linux/interrupt.h>
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#include <linux/dmi.h>
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#include <linux/pm_runtime.h>
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#include <linux/serdev.h>
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
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#include "btbcm.h"
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#include "hci_uart.h"
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#define BCM_NULL_PKT 0x00
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#define BCM_NULL_SIZE 0
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#define BCM_LM_DIAG_PKT 0x07
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#define BCM_LM_DIAG_SIZE 63
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#define BCM_AUTOSUSPEND_DELAY 5000 /* default autosleep delay */
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/* device driver resources */
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struct bcm_device {
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/* Must be the first member, hci_serdev.c expects this. */
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struct hci_uart serdev_hu;
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struct list_head list;
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struct device *dev;
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const char *name;
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struct gpio_desc *device_wakeup;
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struct gpio_desc *shutdown;
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struct clk *clk;
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bool clk_enabled;
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u32 init_speed;
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u32 oper_speed;
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int irq;
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bool irq_active_low;
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#ifdef CONFIG_PM
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struct hci_uart *hu;
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bool is_suspended; /* suspend/resume flag */
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#endif
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};
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/* generic bcm uart resources */
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struct bcm_data {
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struct sk_buff *rx_skb;
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struct sk_buff_head txq;
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struct bcm_device *dev;
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};
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/* List of BCM BT UART devices */
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static DEFINE_MUTEX(bcm_device_lock);
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static LIST_HEAD(bcm_device_list);
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static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)
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{
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if (hu->serdev)
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serdev_device_set_baudrate(hu->serdev, speed);
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else
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hci_uart_set_baudrate(hu, speed);
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}
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static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed)
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{
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struct hci_dev *hdev = hu->hdev;
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struct sk_buff *skb;
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struct bcm_update_uart_baud_rate param;
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if (speed > 3000000) {
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struct bcm_write_uart_clock_setting clock;
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clock.type = BCM_UART_CLOCK_48MHZ;
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bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type);
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/* This Broadcom specific command changes the UART's controller
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* clock for baud rate > 3000000.
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*/
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skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT);
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if (IS_ERR(skb)) {
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int err = PTR_ERR(skb);
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bt_dev_err(hdev, "BCM: failed to write clock (%d)",
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err);
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return err;
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}
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kfree_skb(skb);
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}
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bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed);
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param.zero = cpu_to_le16(0);
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param.baud_rate = cpu_to_le32(speed);
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/* This Broadcom specific command changes the UART's controller baud
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* rate.
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*/
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skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), ¶m,
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HCI_INIT_TIMEOUT);
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if (IS_ERR(skb)) {
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int err = PTR_ERR(skb);
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bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)",
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err);
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return err;
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}
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kfree_skb(skb);
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return 0;
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}
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/* bcm_device_exists should be protected by bcm_device_lock */
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static bool bcm_device_exists(struct bcm_device *device)
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{
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struct list_head *p;
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#ifdef CONFIG_PM
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/* Devices using serdev always exist */
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if (device && device->hu && device->hu->serdev)
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return true;
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#endif
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list_for_each(p, &bcm_device_list) {
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struct bcm_device *dev = list_entry(p, struct bcm_device, list);
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if (device == dev)
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return true;
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}
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return false;
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}
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static int bcm_gpio_set_power(struct bcm_device *dev, bool powered)
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{
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if (powered && !IS_ERR(dev->clk) && !dev->clk_enabled)
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clk_prepare_enable(dev->clk);
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gpiod_set_value(dev->shutdown, powered);
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gpiod_set_value(dev->device_wakeup, powered);
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if (!powered && !IS_ERR(dev->clk) && dev->clk_enabled)
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clk_disable_unprepare(dev->clk);
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dev->clk_enabled = powered;
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return 0;
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}
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#ifdef CONFIG_PM
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static irqreturn_t bcm_host_wake(int irq, void *data)
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{
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struct bcm_device *bdev = data;
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bt_dev_dbg(bdev, "Host wake IRQ");
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pm_runtime_get(bdev->dev);
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pm_runtime_mark_last_busy(bdev->dev);
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pm_runtime_put_autosuspend(bdev->dev);
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return IRQ_HANDLED;
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}
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static int bcm_request_irq(struct bcm_data *bcm)
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{
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struct bcm_device *bdev = bcm->dev;
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int err;
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mutex_lock(&bcm_device_lock);
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if (!bcm_device_exists(bdev)) {
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err = -ENODEV;
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goto unlock;
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}
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if (bdev->irq <= 0) {
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err = -EOPNOTSUPP;
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goto unlock;
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}
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err = devm_request_irq(bdev->dev, bdev->irq, bcm_host_wake,
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bdev->irq_active_low ? IRQF_TRIGGER_FALLING :
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IRQF_TRIGGER_RISING,
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"host_wake", bdev);
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if (err)
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goto unlock;
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device_init_wakeup(bdev->dev, true);
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pm_runtime_set_autosuspend_delay(bdev->dev,
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BCM_AUTOSUSPEND_DELAY);
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pm_runtime_use_autosuspend(bdev->dev);
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pm_runtime_set_active(bdev->dev);
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pm_runtime_enable(bdev->dev);
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unlock:
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mutex_unlock(&bcm_device_lock);
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return err;
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}
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static const struct bcm_set_sleep_mode default_sleep_params = {
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.sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */
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.idle_host = 2, /* idle threshold HOST, in 300ms */
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.idle_dev = 2, /* idle threshold device, in 300ms */
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.bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */
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.host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */
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.allow_host_sleep = 1, /* Allow host sleep in SCO flag */
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.combine_modes = 1, /* Combine sleep and LPM flag */
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.tristate_control = 0, /* Allow tri-state control of UART tx flag */
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/* Irrelevant USB flags */
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.usb_auto_sleep = 0,
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.usb_resume_timeout = 0,
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.pulsed_host_wake = 0,
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.break_to_host = 0
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};
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static int bcm_setup_sleep(struct hci_uart *hu)
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{
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struct bcm_data *bcm = hu->priv;
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struct sk_buff *skb;
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struct bcm_set_sleep_mode sleep_params = default_sleep_params;
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sleep_params.host_wake_active = !bcm->dev->irq_active_low;
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skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params),
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&sleep_params, HCI_INIT_TIMEOUT);
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if (IS_ERR(skb)) {
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int err = PTR_ERR(skb);
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bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err);
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return err;
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}
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kfree_skb(skb);
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bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded");
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return 0;
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}
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#else
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static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; }
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static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; }
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#endif
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static int bcm_set_diag(struct hci_dev *hdev, bool enable)
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{
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struct hci_uart *hu = hci_get_drvdata(hdev);
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struct bcm_data *bcm = hu->priv;
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struct sk_buff *skb;
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if (!test_bit(HCI_RUNNING, &hdev->flags))
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return -ENETDOWN;
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skb = bt_skb_alloc(3, GFP_KERNEL);
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if (!skb)
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return -ENOMEM;
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skb_put_u8(skb, BCM_LM_DIAG_PKT);
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skb_put_u8(skb, 0xf0);
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skb_put_u8(skb, enable);
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skb_queue_tail(&bcm->txq, skb);
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hci_uart_tx_wakeup(hu);
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return 0;
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}
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static int bcm_open(struct hci_uart *hu)
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{
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struct bcm_data *bcm;
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struct list_head *p;
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bt_dev_dbg(hu->hdev, "hu %p", hu);
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bcm = kzalloc(sizeof(*bcm), GFP_KERNEL);
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if (!bcm)
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return -ENOMEM;
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skb_queue_head_init(&bcm->txq);
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hu->priv = bcm;
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mutex_lock(&bcm_device_lock);
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if (hu->serdev) {
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serdev_device_open(hu->serdev);
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bcm->dev = serdev_device_get_drvdata(hu->serdev);
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goto out;
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}
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if (!hu->tty->dev)
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goto out;
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list_for_each(p, &bcm_device_list) {
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struct bcm_device *dev = list_entry(p, struct bcm_device, list);
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/* Retrieve saved bcm_device based on parent of the
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* platform device (saved during device probe) and
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* parent of tty device used by hci_uart
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*/
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if (hu->tty->dev->parent == dev->dev->parent) {
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bcm->dev = dev;
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#ifdef CONFIG_PM
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dev->hu = hu;
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#endif
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break;
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}
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}
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out:
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if (bcm->dev) {
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hu->init_speed = bcm->dev->init_speed;
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hu->oper_speed = bcm->dev->oper_speed;
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bcm_gpio_set_power(bcm->dev, true);
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}
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mutex_unlock(&bcm_device_lock);
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return 0;
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}
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static int bcm_close(struct hci_uart *hu)
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{
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struct bcm_data *bcm = hu->priv;
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struct bcm_device *bdev = NULL;
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bt_dev_dbg(hu->hdev, "hu %p", hu);
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/* Protect bcm->dev against removal of the device or driver */
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mutex_lock(&bcm_device_lock);
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if (hu->serdev) {
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serdev_device_close(hu->serdev);
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bdev = serdev_device_get_drvdata(hu->serdev);
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} else if (bcm_device_exists(bcm->dev)) {
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bdev = bcm->dev;
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#ifdef CONFIG_PM
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bdev->hu = NULL;
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#endif
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}
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if (bdev) {
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bcm_gpio_set_power(bdev, false);
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#ifdef CONFIG_PM
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pm_runtime_disable(bdev->dev);
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pm_runtime_set_suspended(bdev->dev);
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if (device_can_wakeup(bdev->dev)) {
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devm_free_irq(bdev->dev, bdev->irq, bdev);
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device_init_wakeup(bdev->dev, false);
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}
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#endif
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}
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mutex_unlock(&bcm_device_lock);
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skb_queue_purge(&bcm->txq);
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kfree_skb(bcm->rx_skb);
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kfree(bcm);
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hu->priv = NULL;
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return 0;
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}
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static int bcm_flush(struct hci_uart *hu)
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{
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struct bcm_data *bcm = hu->priv;
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bt_dev_dbg(hu->hdev, "hu %p", hu);
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skb_queue_purge(&bcm->txq);
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return 0;
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}
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static int bcm_setup(struct hci_uart *hu)
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{
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struct bcm_data *bcm = hu->priv;
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char fw_name[64];
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const struct firmware *fw;
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unsigned int speed;
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int err;
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bt_dev_dbg(hu->hdev, "hu %p", hu);
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hu->hdev->set_diag = bcm_set_diag;
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hu->hdev->set_bdaddr = btbcm_set_bdaddr;
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err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name));
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if (err)
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return err;
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err = request_firmware(&fw, fw_name, &hu->hdev->dev);
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if (err < 0) {
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bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name);
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return 0;
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}
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err = btbcm_patchram(hu->hdev, fw);
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if (err) {
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bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err);
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goto finalize;
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}
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/* Init speed if any */
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if (hu->init_speed)
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speed = hu->init_speed;
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else if (hu->proto->init_speed)
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speed = hu->proto->init_speed;
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else
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speed = 0;
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if (speed)
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host_set_baudrate(hu, speed);
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/* Operational speed if any */
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if (hu->oper_speed)
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speed = hu->oper_speed;
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else if (hu->proto->oper_speed)
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speed = hu->proto->oper_speed;
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else
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speed = 0;
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if (speed) {
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err = bcm_set_baudrate(hu, speed);
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if (!err)
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host_set_baudrate(hu, speed);
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}
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finalize:
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release_firmware(fw);
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err = btbcm_finalize(hu->hdev);
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if (err)
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return err;
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|
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if (!bcm_request_irq(bcm))
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err = bcm_setup_sleep(hu);
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return err;
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}
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|
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#define BCM_RECV_LM_DIAG \
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.type = BCM_LM_DIAG_PKT, \
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.hlen = BCM_LM_DIAG_SIZE, \
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.loff = 0, \
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.lsize = 0, \
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.maxlen = BCM_LM_DIAG_SIZE
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|
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#define BCM_RECV_NULL \
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.type = BCM_NULL_PKT, \
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.hlen = BCM_NULL_SIZE, \
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.loff = 0, \
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.lsize = 0, \
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.maxlen = BCM_NULL_SIZE
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|
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static const struct h4_recv_pkt bcm_recv_pkts[] = {
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{ H4_RECV_ACL, .recv = hci_recv_frame },
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{ H4_RECV_SCO, .recv = hci_recv_frame },
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{ H4_RECV_EVENT, .recv = hci_recv_frame },
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{ BCM_RECV_LM_DIAG, .recv = hci_recv_diag },
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{ BCM_RECV_NULL, .recv = hci_recv_diag },
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};
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static int bcm_recv(struct hci_uart *hu, const void *data, int count)
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{
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struct bcm_data *bcm = hu->priv;
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if (!test_bit(HCI_UART_REGISTERED, &hu->flags))
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return -EUNATCH;
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bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count,
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bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts));
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if (IS_ERR(bcm->rx_skb)) {
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int err = PTR_ERR(bcm->rx_skb);
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bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
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bcm->rx_skb = NULL;
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return err;
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} else if (!bcm->rx_skb) {
|
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/* Delay auto-suspend when receiving completed packet */
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mutex_lock(&bcm_device_lock);
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if (bcm->dev && bcm_device_exists(bcm->dev)) {
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pm_runtime_get(bcm->dev->dev);
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pm_runtime_mark_last_busy(bcm->dev->dev);
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pm_runtime_put_autosuspend(bcm->dev->dev);
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}
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mutex_unlock(&bcm_device_lock);
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}
|
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|
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return count;
|
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}
|
|
|
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static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb)
|
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{
|
|
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);
|
|
|
|
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 */
|
|
if (bdev->device_wakeup) {
|
|
gpiod_set_value(bdev->device_wakeup, false);
|
|
bt_dev_dbg(bdev, "suspend, delaying 15 ms");
|
|
mdelay(15);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bcm_resume_device(struct device *dev)
|
|
{
|
|
struct bcm_device *bdev = dev_get_drvdata(dev);
|
|
|
|
bt_dev_dbg(bdev, "");
|
|
|
|
if (bdev->device_wakeup) {
|
|
gpiod_set_value(bdev->device_wakeup, true);
|
|
bt_dev_dbg(bdev, "resume, delaying 15 ms");
|
|
mdelay(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)) {
|
|
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);
|
|
|
|
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)) {
|
|
disable_irq_wake(bdev->irq);
|
|
bt_dev_dbg(bdev, "BCM irq: disabled");
|
|
}
|
|
|
|
bcm_resume_device(dev);
|
|
|
|
unlock:
|
|
mutex_unlock(&bcm_device_lock);
|
|
|
|
pm_runtime_disable(dev);
|
|
pm_runtime_set_active(dev);
|
|
pm_runtime_enable(dev);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static const struct acpi_gpio_params int_last_device_wakeup_gpios = { 0, 0, false };
|
|
static const struct acpi_gpio_params int_last_shutdown_gpios = { 1, 0, false };
|
|
static const struct acpi_gpio_params int_last_host_wakeup_gpios = { 2, 0, false };
|
|
|
|
static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = {
|
|
{ "device-wakeup-gpios", &int_last_device_wakeup_gpios, 1 },
|
|
{ "shutdown-gpios", &int_last_shutdown_gpios, 1 },
|
|
{ "host-wakeup-gpios", &int_last_host_wakeup_gpios, 1 },
|
|
{ },
|
|
};
|
|
|
|
static const struct acpi_gpio_params int_first_host_wakeup_gpios = { 0, 0, false };
|
|
static const struct acpi_gpio_params int_first_device_wakeup_gpios = { 1, 0, false };
|
|
static const struct acpi_gpio_params int_first_shutdown_gpios = { 2, 0, false };
|
|
|
|
static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = {
|
|
{ "device-wakeup-gpios", &int_first_device_wakeup_gpios, 1 },
|
|
{ "shutdown-gpios", &int_first_shutdown_gpios, 1 },
|
|
{ "host-wakeup-gpios", &int_first_host_wakeup_gpios, 1 },
|
|
{ },
|
|
};
|
|
|
|
#ifdef CONFIG_ACPI
|
|
/* IRQ polarity of some chipsets are not defined correctly in ACPI table. */
|
|
static const struct dmi_system_id bcm_active_low_irq_dmi_table[] = {
|
|
{
|
|
.ident = "Asus T100TA",
|
|
.matches = {
|
|
DMI_EXACT_MATCH(DMI_SYS_VENDOR,
|
|
"ASUSTeK COMPUTER INC."),
|
|
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100TA"),
|
|
},
|
|
},
|
|
{
|
|
.ident = "Asus T100CHI",
|
|
.matches = {
|
|
DMI_EXACT_MATCH(DMI_SYS_VENDOR,
|
|
"ASUSTeK COMPUTER INC."),
|
|
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100CHI"),
|
|
},
|
|
},
|
|
{ /* Handle ThinkPad 8 tablets with BCM2E55 chipset ACPI ID */
|
|
.ident = "Lenovo ThinkPad 8",
|
|
.matches = {
|
|
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
|
|
DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "ThinkPad 8"),
|
|
},
|
|
},
|
|
{
|
|
.ident = "MINIX Z83-4",
|
|
.matches = {
|
|
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "MINIX"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "Z83-4"),
|
|
},
|
|
},
|
|
{ }
|
|
};
|
|
|
|
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;
|
|
dev->irq_active_low = irq->polarity == ACPI_ACTIVE_LOW;
|
|
break;
|
|
|
|
case ACPI_RESOURCE_TYPE_GPIO:
|
|
gpio = &ares->data.gpio;
|
|
if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT)
|
|
dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW;
|
|
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;
|
|
}
|
|
#endif /* CONFIG_ACPI */
|
|
|
|
static int bcm_get_resources(struct bcm_device *dev)
|
|
{
|
|
dev->name = dev_name(dev->dev);
|
|
|
|
dev->clk = devm_clk_get(dev->dev, NULL);
|
|
|
|
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);
|
|
|
|
/* 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);
|
|
}
|
|
|
|
dev_info(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 dmi_system_id *dmi_id;
|
|
const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios;
|
|
const struct acpi_device_id *id;
|
|
struct resource_entry *entry;
|
|
int ret;
|
|
|
|
/* Retrieve GPIO data */
|
|
id = acpi_match_device(dev->dev->driver->acpi_match_table, dev->dev);
|
|
if (id)
|
|
gpio_mapping = (const struct acpi_gpio_mapping *) id->driver_data;
|
|
|
|
ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Retrieve UART ACPI info */
|
|
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);
|
|
|
|
dmi_id = dmi_first_match(bcm_active_low_irq_dmi_table);
|
|
if (dmi_id) {
|
|
dev_warn(dev->dev, "%s: Overwriting IRQ polarity to active low",
|
|
dmi_id->ident);
|
|
dev->irq_active_low = true;
|
|
}
|
|
|
|
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);
|
|
|
|
bcm_gpio_set_power(dev, false);
|
|
|
|
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[] = {
|
|
{ "BCM2E1A", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
|
|
{ "BCM2E39", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
|
|
{ "BCM2E3A", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
|
|
{ "BCM2E3D", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
|
|
{ "BCM2E3F", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
|
|
{ "BCM2E40", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
|
|
{ "BCM2E54", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
|
|
{ "BCM2E55", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
|
|
{ "BCM2E64", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
|
|
{ "BCM2E65", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
|
|
{ "BCM2E67", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
|
|
{ "BCM2E71", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
|
|
{ "BCM2E7B", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
|
|
{ "BCM2E7C", (kernel_ulong_t)&acpi_bcm_int_last_gpios },
|
|
{ "BCM2E7E", (kernel_ulong_t)&acpi_bcm_int_first_gpios },
|
|
{ "BCM2E95", (kernel_ulong_t)&acpi_bcm_int_first_gpios },
|
|
{ "BCM2E96", (kernel_ulong_t)&acpi_bcm_int_first_gpios },
|
|
{ "BCM2EA4", (kernel_ulong_t)&acpi_bcm_int_first_gpios },
|
|
{ },
|
|
};
|
|
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;
|
|
|
|
bcm_gpio_set_power(bcmdev, false);
|
|
|
|
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",
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.of_match_table = of_match_ptr(bcm_bluetooth_of_match),
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.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);
|
|
}
|