1112 lines
27 KiB
C
1112 lines
27 KiB
C
/*
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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 version 2 as
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* published by the Free Software Foundation.
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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*/
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#define DEBUG
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/notifier.h>
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#include <linux/proc_fs.h>
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#include <linux/spinlock.h>
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#include <linux/timer.h>
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#include <linux/uaccess.h>
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#include <linux/version.h>
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#include <linux/workqueue.h>
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#include <linux/platform_device.h>
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#include <linux/irq.h>
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#include <linux/param.h>
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#include <linux/bitops.h>
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#include <linux/termios.h>
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#include <linux/gpio.h>
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#include <linux/of_gpio.h>
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#include <linux/of_platform.h>
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0)
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#include <linux/pm_wakeirq.h>
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#endif
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
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#include <linux/serial_core.h>
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#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 14, 0)
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#include <linux/wakelock.h>
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#endif
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/*
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* #define BT_SLEEP_DBG
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*/
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#define BT_SLEEP_DBG
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#undef BT_DBG
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#undef BT_ERR
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#ifdef BT_SLEEP_DBG
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#define BT_DBG(fmt, arg...) pr_debug("[BT_LPM] %s: " fmt "\n",\
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__func__, ## arg)
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#else
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#define BT_DBG(fmt, arg...)
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#endif
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#define BT_ERR(fmt, arg...) pr_debug("[BT_LPM] %s: " fmt "\n",\
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__func__, ## arg)
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/*
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* Defines
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*/
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#define VERSION "1.3.3"
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#define PROC_DIR "bluetooth/sleep"
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#define DEFAULT_UART_INDEX 1
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#define BT_BLUEDROID_SUPPORT 1
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static int bluesleep_start(void);
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static void bluesleep_stop(void);
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struct bluesleep_info {
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unsigned int wakeup_enable;
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unsigned host_wake;
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unsigned ext_wake;
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unsigned host_wake_irq;
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0)
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struct wakeup_source *ws;
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#else
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struct wake_lock wake_lock;
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#endif
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struct uart_port *uport;
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unsigned host_wake_assert:1;
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unsigned ext_wake_assert:1;
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struct platform_device *pdev;
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};
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/* work function */
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static void bluesleep_sleep_work(struct work_struct *work);
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static void bluesleep_tx_allow_sleep(void);
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/* work queue */
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DECLARE_DELAYED_WORK(sleep_workqueue, bluesleep_sleep_work);
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/* Macros for handling sleep work */
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#define bluesleep_rx_busy() schedule_delayed_work(&sleep_workqueue, 0)
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#define bluesleep_tx_busy() schedule_delayed_work(&sleep_workqueue, 0)
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#define bluesleep_rx_idle() schedule_delayed_work(&sleep_workqueue, 0)
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#define bluesleep_tx_idle() schedule_delayed_work(&sleep_workqueue, 0)
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/* 1 second timeout */
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#define RX_TIMER_INTERVAL 1
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/* state variable names and bit positions */
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#define BT_PROTO 0x01
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#define BT_TXDATA 0x02
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#define BT_ASLEEP 0x04
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#define BT_RXTIMER 0x20
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#define BT_TXIDLE 0x08
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#if BT_BLUEDROID_SUPPORT
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static bool has_lpm_enabled;
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#else
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/* global pointer to a single hci device. */
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static struct hci_dev *bluesleep_hdev;
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#endif
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#if BT_BLUEDROID_SUPPORT
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static struct platform_device *bluesleep_uart_dev;
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#endif
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static struct bluesleep_info *bsi;
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/* module usage */
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static atomic_t open_count = ATOMIC_INIT(1);
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/*
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* Local function prototypes
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*/
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#if !BT_BLUEDROID_SUPPORT
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static int bluesleep_hci_event(struct notifier_block *this,
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unsigned long event, void *data);
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#endif
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/*
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* Global variables
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*/
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/** Global state flags */
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static unsigned long flags;
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/** Tasklet to respond to change in hostwake line */
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static struct tasklet_struct hostwake_task;
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/** Reception timer */
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0)
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static void bluesleep_rx_timer_expire(struct timer_list *t);
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#else
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static void bluesleep_rx_timer_expire(unsigned long data);
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#endif
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static struct timer_list rx_timer;
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/** Lock for state transitions */
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static spinlock_t rw_lock;
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#if !BT_BLUEDROID_SUPPORT
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/** Notifier block for HCI events */
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struct notifier_block hci_event_nblock = {
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.notifier_call = bluesleep_hci_event,
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};
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#endif
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struct proc_dir_entry *bluetooth_dir, *sleep_dir;
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/*
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* Local functions
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*/
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/*
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* bt go to sleep will call this function tell uart stop data interactive
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*/
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static void hsuart_power(int on)
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{
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if (bsi->uport != NULL) {
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if (on)
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bsi->uport->ops->set_mctrl(bsi->uport, TIOCM_RTS);
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else
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bsi->uport->ops->set_mctrl(bsi->uport, 0);
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} else {
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BT_ERR("bsi->uport = NULL, has_lpm_enabled = %d", has_lpm_enabled);
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}
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}
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/**
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* @return 1 if the Host can go to sleep, 0 otherwise.
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*/
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static inline int bluesleep_can_sleep(void)
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{
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/* check if HOST_WAKE_BT_GPIO and BT_WAKE_HOST_GPIO
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* are both deasserted
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*/
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return (gpio_get_value(bsi->ext_wake) != bsi->ext_wake_assert) &&
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(gpio_get_value(bsi->host_wake) != bsi->host_wake_assert) &&
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(!test_bit(BT_RXTIMER, &flags)) && (bsi->uport != NULL);
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}
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/**
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* @brief@ main sleep work handling function which update the flags
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* and activate and deactivate UART ,check FIFO.
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*/
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static void bluesleep_sleep_work(struct work_struct *work)
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{
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if (!has_lpm_enabled)
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return;
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if (bluesleep_can_sleep()) {
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/* already asleep, this is an error case */
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if (test_bit(BT_ASLEEP, &flags)) {
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BT_DBG("already asleep");
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return;
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}
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if (bsi->uport->ops->tx_empty(bsi->uport)) {
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BT_DBG("going to sleep...");
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set_bit(BT_ASLEEP, &flags);
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/*Deactivating UART */
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hsuart_power(0);
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0)
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__pm_wakeup_event(bsi->ws, HZ / 2);
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#else
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wake_lock_timeout(&bsi->wake_lock, HZ / 2);
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#endif
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} else {
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BT_DBG("This should never happen.\n");
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return;
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}
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} else if (test_bit(BT_ASLEEP, &flags)) {
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BT_DBG("hold wake locks for rx_task.");
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0)
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__pm_stay_awake(bsi->ws);
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#else
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wake_lock(&bsi->wake_lock);
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#endif
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clear_bit(BT_ASLEEP, &flags);
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/* Add a timer to make sure that UART
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* would not be turned on&off very frequentently
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*/
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mod_timer(&rx_timer, jiffies + (RX_TIMER_INTERVAL * HZ));
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set_bit(BT_RXTIMER, &flags);
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hsuart_power(1);
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} else {
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mod_timer(&rx_timer, jiffies + (RX_TIMER_INTERVAL * HZ));
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if (gpio_get_value(bsi->ext_wake) != bsi->ext_wake_assert
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&& !test_bit(BT_TXIDLE, &flags)) {
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BT_DBG("force retrigger bt wake:%lx", flags);
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gpio_set_value(bsi->ext_wake, bsi->ext_wake_assert);
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msleep(20);
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gpio_set_value(bsi->ext_wake, !bsi->ext_wake_assert);
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}
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}
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}
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/**
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* A tasklet function that runs in tasklet context and reads the value
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* of the HOST_WAKE GPIO pin and further defer the work.
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* @param data Not used.
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*/
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static void bluesleep_hostwake_task(unsigned long data)
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{
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BT_DBG("hostwake line change");
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spin_lock(&rw_lock);
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if (gpio_get_value(bsi->host_wake) == bsi->host_wake_assert)
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bluesleep_rx_busy();
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else
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bluesleep_rx_idle();
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spin_unlock(&rw_lock);
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}
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/**
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* Handles proper timer action when outgoing data is delivered to the
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* HCI line discipline. Sets BT_TXDATA.
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*/
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static void bluesleep_outgoing_data(void)
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{
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unsigned long irq_flags;
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int power_on_uart = 0;
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spin_lock_irqsave(&rw_lock, irq_flags);
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/* if the tx side is sleeping... */
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if (gpio_get_value(bsi->ext_wake) != bsi->ext_wake_assert) {
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BT_DBG("tx was sleeping, wakeup it");
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0)
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__pm_stay_awake(bsi->ws);
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#else
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wake_lock(&bsi->wake_lock);
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#endif
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gpio_set_value(bsi->ext_wake, bsi->ext_wake_assert);
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clear_bit(BT_ASLEEP, &flags);
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clear_bit(BT_TXIDLE, &flags);
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power_on_uart = 1;
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}
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spin_unlock_irqrestore(&rw_lock, irq_flags);
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if (power_on_uart == 1)
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hsuart_power(1);
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}
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#if BT_BLUEDROID_SUPPORT
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static struct uart_port *bluesleep_get_uart_port(void)
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{
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struct uart_port *uport = NULL;
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if (bluesleep_uart_dev) {
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uport = platform_get_drvdata(bluesleep_uart_dev);
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if (uport)
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BT_DBG(
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"%s get uart_port from blusleep_uart_dev: %s, port irq: %d",
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__func__, bluesleep_uart_dev->name, uport->irq);
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}
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return uport;
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}
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static int bluesleep_lpm_proc_show(struct seq_file *m, void *v)
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{
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seq_printf(m, "lpm enable: %d\n", has_lpm_enabled);
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return 0;
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}
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static int bluesleep_lpm_proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, bluesleep_lpm_proc_show, NULL);
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}
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static ssize_t bluesleep_write_proc_lpm(struct file *file,
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const char __user *buffer,
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size_t count, loff_t *pos)
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{
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char b;
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if (count < 1)
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return -EINVAL;
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if (copy_from_user(&b, buffer, 1))
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return -EFAULT;
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if (b == '0') {
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/* HCI_DEV_UNREG */
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bluesleep_stop();
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has_lpm_enabled = false;
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bsi->uport = NULL;
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} else {
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/* HCI_DEV_REG */
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if (!has_lpm_enabled) {
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has_lpm_enabled = true;
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if (bluesleep_uart_dev)
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bsi->uport = bluesleep_get_uart_port();
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/* if bluetooth started, start bluesleep*/
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bluesleep_start();
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}
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}
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return count;
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}
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static int bluesleep_btwrite_proc_show(struct seq_file *m, void *v)
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{
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seq_puts(m, "it's not support\n");
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return 0;
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}
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static int bluesleep_btwrite_proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, bluesleep_btwrite_proc_show, NULL);
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}
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static ssize_t bluesleep_write_proc_btwrite(struct file *file,
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const char __user *buffer,
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size_t count, loff_t *pos)
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{
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char b;
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if (count < 1)
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return -EINVAL;
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if (copy_from_user(&b, buffer, 1))
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return -EFAULT;
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/* HCI_DEV_WRITE */
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if (b != '0')
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bluesleep_outgoing_data();
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else
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bluesleep_tx_allow_sleep();
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return count;
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}
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#if LINUX_VERSION_CODE > KERNEL_VERSION(5, 10, 0)
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static const struct proc_ops lpm_fops = {
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.proc_open = bluesleep_lpm_proc_open,
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.proc_read = seq_read,
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.proc_lseek = seq_lseek,
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.proc_release = single_release,
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.proc_write = bluesleep_write_proc_lpm,
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};
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static const struct proc_ops btwrite_fops = {
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.proc_open = bluesleep_btwrite_proc_open,
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.proc_read = seq_read,
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.proc_lseek = seq_lseek,
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.proc_release = single_release,
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.proc_write = bluesleep_write_proc_btwrite,
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};
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#else
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static const struct file_operations lpm_fops = {
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.owner = THIS_MODULE,
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.open = bluesleep_lpm_proc_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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.write = bluesleep_write_proc_lpm,
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};
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static const struct file_operations btwrite_fops = {
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.owner = THIS_MODULE,
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.open = bluesleep_btwrite_proc_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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.write = bluesleep_write_proc_btwrite,
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};
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#endif
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#else
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/**
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* Handles HCI device events.
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* @param this Not used.
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* @param event The event that occurred.
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* @param data The HCI device associated with the event.
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* @return <code>NOTIFY_DONE</code>.
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*/
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static int bluesleep_hci_event(struct notifier_block *this,
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unsigned long event, void *data)
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{
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struct hci_dev *hdev = (struct hci_dev *) data;
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struct hci_uart *hu;
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struct uart_state *state;
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if (!hdev)
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return NOTIFY_DONE;
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switch (event) {
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case HCI_DEV_REG:
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if (!bluesleep_hdev) {
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bluesleep_hdev = hdev;
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hu = (struct hci_uart *) hdev->driver_data;
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state = (struct uart_state *) hu->tty->driver_data;
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bsi->uport = state->uart_port;
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}
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break;
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case HCI_DEV_UNREG:
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bluesleep_hdev = NULL;
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bsi->uport = NULL;
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break;
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case HCI_DEV_WRITE:
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bluesleep_outgoing_data();
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break;
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}
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return NOTIFY_DONE;
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}
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#endif
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/**
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* Function to check wheather bluetooth can sleep when btwrite was deasserted
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* by bluedroid.
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*/
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static void bluesleep_tx_allow_sleep(void)
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{
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unsigned long irq_flags;
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BT_DBG("Tx has been idle\n");
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spin_lock_irqsave(&rw_lock, irq_flags);
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gpio_set_value(bsi->ext_wake, !bsi->ext_wake_assert);
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set_bit(BT_TXIDLE, &flags);
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bluesleep_tx_idle();
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spin_unlock_irqrestore(&rw_lock, irq_flags);
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}
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/* Handles reception timer expiration.
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* Clear BT_RXTIMER.
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* @param data Not used.
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*/
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0)
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static void bluesleep_rx_timer_expire(struct timer_list *t)
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#else
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static void bluesleep_rx_timer_expire(unsigned long data)
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#endif
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{
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BT_DBG("bluesleep_rx_timer_expire");
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clear_bit(BT_RXTIMER, &flags);
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bluesleep_rx_idle();
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}
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/**
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* Schedules a tasklet to run when receiving an interrupt on the
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* <code>HOST_WAKE</code> GPIO pin.
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* @param irq Not used.
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* @param dev_id Not used.
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*/
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static irqreturn_t bluesleep_hostwake_isr(int irq, void *dev_id)
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{
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/* schedule a tasklet to handle the change in the host wake line */
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tasklet_schedule(&hostwake_task);
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return IRQ_HANDLED;
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}
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/**
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* Starts the Sleep-Mode Protocol on the Host.
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* @return On success, 0. On error, -1, and <code>errno</code> is set
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* appropriately.
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*/
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static int bluesleep_start(void)
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{
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int retval;
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unsigned long irq_flags;
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spin_lock_irqsave(&rw_lock, irq_flags);
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|
|
|
if (test_bit(BT_PROTO, &flags)) {
|
|
spin_unlock_irqrestore(&rw_lock, irq_flags);
|
|
return 0;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&rw_lock, irq_flags);
|
|
|
|
if (!atomic_dec_and_test(&open_count)) {
|
|
atomic_inc(&open_count);
|
|
return -EBUSY;
|
|
}
|
|
|
|
/* start the timer */
|
|
mod_timer(&rx_timer, jiffies + (RX_TIMER_INTERVAL*HZ));
|
|
/*deassert BT_WAKE first*/
|
|
gpio_set_value(bsi->ext_wake, !bsi->ext_wake_assert);
|
|
msleep(20);
|
|
|
|
/* assert BT_WAKE */
|
|
gpio_set_value(bsi->ext_wake, bsi->ext_wake_assert);
|
|
retval = request_irq(bsi->host_wake_irq, bluesleep_hostwake_isr,
|
|
IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
|
|
"bluetooth hostwake", &bsi->pdev->dev);
|
|
if (retval < 0) {
|
|
BT_ERR("Couldn't acquire BT_HOST_WAKE IRQ");
|
|
goto fail;
|
|
}
|
|
|
|
set_bit(BT_PROTO, &flags);
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0)
|
|
__pm_stay_awake(bsi->ws);
|
|
#else
|
|
wake_lock(&bsi->wake_lock);
|
|
#endif
|
|
|
|
return 0;
|
|
fail:
|
|
del_timer(&rx_timer);
|
|
atomic_inc(&open_count);
|
|
|
|
return retval;
|
|
}
|
|
|
|
/**
|
|
* Stops the Sleep-Mode Protocol on the Host.
|
|
*/
|
|
static void bluesleep_stop(void)
|
|
{
|
|
unsigned long irq_flags;
|
|
|
|
spin_lock_irqsave(&rw_lock, irq_flags);
|
|
|
|
if (!test_bit(BT_PROTO, &flags)) {
|
|
spin_unlock_irqrestore(&rw_lock, irq_flags);
|
|
return;
|
|
}
|
|
|
|
/* assert BT_WAKE */
|
|
gpio_set_value(bsi->ext_wake, bsi->ext_wake_assert);
|
|
|
|
del_timer(&rx_timer);
|
|
clear_bit(BT_PROTO, &flags);
|
|
|
|
if (test_bit(BT_ASLEEP, &flags)) {
|
|
clear_bit(BT_ASLEEP, &flags);
|
|
hsuart_power(1);
|
|
}
|
|
|
|
atomic_inc(&open_count);
|
|
|
|
spin_unlock_irqrestore(&rw_lock, irq_flags);
|
|
free_irq(bsi->host_wake_irq, &bsi->pdev->dev);
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0)
|
|
__pm_wakeup_event(bsi->ws, HZ / 2);
|
|
#else
|
|
wake_lock_timeout(&bsi->wake_lock, HZ / 2);
|
|
#endif
|
|
}
|
|
#if 0
|
|
/**
|
|
* Read the <code>BT_WAKE</code> GPIO pin value via the proc interface.
|
|
* When this function returns, <code>page</code> will contain a 1 if the
|
|
* pin is high, 0 otherwise.
|
|
* @param page Buffer for writing data.
|
|
* @param start Not used.
|
|
* @param offset Not used.
|
|
* @param count Not used.
|
|
* @param eof Whether or not there is more data to be read.
|
|
* @param data Not used.
|
|
* @return The number of bytes written.
|
|
*/
|
|
static int bluepower_read_proc_btwake(char *page, char **start, off_t offset,
|
|
int count, int *eof, void *data)
|
|
{
|
|
*eof = 1;
|
|
return sprintf(page, "btwake:%u\n",
|
|
(gpio_get_value(bsi->ext_wake) == bsi->ext_wake_assert));
|
|
}
|
|
|
|
/**
|
|
* Write the <code>BT_WAKE</code> GPIO pin value via the proc interface.
|
|
* @param file Not used.
|
|
* @param buffer The buffer to read from.
|
|
* @param count The number of bytes to be written.
|
|
* @param data Not used.
|
|
* @return On success, the number of bytes written. On error, -1, and
|
|
* <code>errno</code> is set appropriately.
|
|
*/
|
|
static int bluepower_write_proc_btwake(struct file *file, const char *buffer,
|
|
unsigned long count, void *data)
|
|
{
|
|
char *buf;
|
|
|
|
if (count < 1)
|
|
return -EINVAL;
|
|
|
|
buf = kmalloc(count, GFP_KERNEL);
|
|
if (!buf)
|
|
return -ENOMEM;
|
|
|
|
if (copy_from_user(buf, buffer, count)) {
|
|
kfree(buf);
|
|
return -EFAULT;
|
|
}
|
|
|
|
if (buf[0] == '0') {
|
|
gpio_set_value(bsi->ext_wake, !bsi->ext_wake_assert);
|
|
} else if (buf[0] == '1') {
|
|
gpio_set_value(bsi->ext_wake, bsi->ext_wake_assert);
|
|
} else {
|
|
kfree(buf);
|
|
return -EINVAL;
|
|
}
|
|
|
|
kfree(buf);
|
|
return count;
|
|
}
|
|
|
|
/**
|
|
* Read the <code>BT_HOST_WAKE</code> GPIO pin value via the proc interface.
|
|
* When this function returns, <code>page</code> will contain a 1 if the pin
|
|
* is high, 0 otherwise.
|
|
* @param page Buffer for writing data.
|
|
* @param start Not used.
|
|
* @param offset Not used.
|
|
* @param count Not used.
|
|
* @param eof Whether or not there is more data to be read.
|
|
* @param data Not used.
|
|
* @return The number of bytes written.
|
|
*/
|
|
static int bluepower_read_proc_hostwake(char *page, char **start, off_t offset,
|
|
int count, int *eof, void *data)
|
|
{
|
|
*eof = 1;
|
|
return sprintf(page, "hostwake: %u\n",
|
|
(gpio_get_value(bsi->host_wake) == bsi->host_wake_assert));
|
|
}
|
|
|
|
|
|
/**
|
|
* Read the low-power status of the Host via the proc interface.
|
|
* When this function returns, <code>page</code> contains a 1 if the Host
|
|
* is asleep, 0 otherwise.
|
|
* @param page Buffer for writing data.
|
|
* @param start Not used.
|
|
* @param offset Not used.
|
|
* @param count Not used.
|
|
* @param eof Whether or not there is more data to be read.
|
|
* @param data Not used.
|
|
* @return The number of bytes written.
|
|
*/
|
|
static int bluesleep_read_proc_asleep(char *page, char **start, off_t offset,
|
|
int count, int *eof, void *data)
|
|
{
|
|
unsigned int asleep;
|
|
|
|
asleep = test_bit(BT_ASLEEP, &flags) ? 1 : 0;
|
|
*eof = 1;
|
|
return sprintf(page, "asleep: %u\n", asleep);
|
|
}
|
|
|
|
/**
|
|
* Read the low-power protocol being used by the Host via the proc interface.
|
|
* When this function returns, <code>page</code> will contain a 1 if the Host
|
|
* is using the Sleep Mode Protocol, 0 otherwise.
|
|
* @param page Buffer for writing data.
|
|
* @param start Not used.
|
|
* @param offset Not used.
|
|
* @param count Not used.
|
|
* @param eof Whether or not there is more data to be read.
|
|
* @param data Not used.
|
|
* @return The number of bytes written.
|
|
*/
|
|
static int bluesleep_read_proc_proto(char *page, char **start, off_t offset,
|
|
int count, int *eof, void *data)
|
|
{
|
|
unsigned int proto;
|
|
|
|
proto = test_bit(BT_PROTO, &flags) ? 1 : 0;
|
|
*eof = 1;
|
|
return sprintf(page, "proto: %u\n", proto);
|
|
}
|
|
|
|
/**
|
|
* Modify the low-power protocol used by the Host via the proc interface.
|
|
* @param file Not used.
|
|
* @param buffer The buffer to read from.
|
|
* @param count The number of bytes to be written.
|
|
* @param data Not used.
|
|
* @return On success, the number of bytes written. On error, -1, and
|
|
* <code>errno</code> is set appropriately.
|
|
*/
|
|
static int bluesleep_write_proc_proto(struct file *file, const char *buffer,
|
|
unsigned long count, void *data)
|
|
{
|
|
char proto;
|
|
|
|
if (count < 1)
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(&proto, buffer, 1))
|
|
return -EFAULT;
|
|
|
|
if (proto == '0')
|
|
bluesleep_stop();
|
|
else
|
|
bluesleep_start();
|
|
|
|
/* claim that we wrote everything */
|
|
return count;
|
|
}
|
|
#endif
|
|
|
|
static int assert_level = -1;
|
|
module_param(assert_level, int, S_IRUGO);
|
|
MODULE_PARM_DESC(assert_level, "BT_LPM hostwake/btwake assert level");
|
|
|
|
#if 1
|
|
static struct platform_device *sw_uart_get_pdev(int id)
|
|
{
|
|
struct device_node *np;
|
|
char match[20];
|
|
sprintf(match, "uart%d", id);
|
|
np = of_find_node_by_type(NULL, match);
|
|
return of_find_device_by_node(np);
|
|
}
|
|
#endif
|
|
|
|
static int bluesleep_probe(struct platform_device *pdev)
|
|
{
|
|
#if 1
|
|
struct device_node *np = of_find_compatible_node(NULL, NULL, "allwinner,sunxi-btlpm");
|
|
struct device *dev = &pdev->dev;
|
|
enum of_gpio_flags config;
|
|
int ret, uart_index;
|
|
u32 val;
|
|
|
|
bsi = devm_kzalloc(&pdev->dev, sizeof(struct bluesleep_info),
|
|
GFP_KERNEL);
|
|
if (!bsi)
|
|
return -ENOMEM;
|
|
|
|
bsi->host_wake = of_get_named_gpio_flags(np, "bt_hostwake", 0, &config);
|
|
if (!gpio_is_valid(bsi->host_wake)) {
|
|
BT_ERR("get gpio bt_hostwake failed\n");
|
|
ret = -EINVAL;
|
|
goto err0;
|
|
}
|
|
|
|
/* set host_wake_assert */
|
|
bsi->host_wake_assert = (config == OF_GPIO_ACTIVE_LOW) ? 0 : 1;
|
|
BT_DBG("bt_hostwake gpio=%d assert=%d\n", bsi->host_wake, bsi->host_wake_assert);
|
|
|
|
if (assert_level != -1) {
|
|
bsi->host_wake_assert = (assert_level & 0x02) > 0;
|
|
BT_DBG("override host_wake assert to %d", bsi->host_wake_assert);
|
|
}
|
|
|
|
ret = devm_gpio_request(dev, bsi->host_wake, "bt_hostwake");
|
|
if (ret < 0) {
|
|
BT_ERR("can't request bt_hostwake gpio %d\n",
|
|
bsi->host_wake);
|
|
goto err0;
|
|
}
|
|
ret = gpio_direction_input(bsi->host_wake);
|
|
if (ret < 0) {
|
|
BT_ERR("can't request input direction bt_wake gpio %d\n",
|
|
bsi->host_wake);
|
|
goto err1;
|
|
}
|
|
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 19, 0)
|
|
if (!of_property_read_bool(np, "wakeup-source")) {
|
|
#else
|
|
if (!of_property_read_u32(np, "wakeup-source", &bsi->wakeup_enable) &&
|
|
(bsi->wakeup_enable == 0)) {
|
|
#endif
|
|
BT_DBG("wakeup source is disabled!\n");
|
|
} else {
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0)
|
|
ret = device_init_wakeup(dev, true);
|
|
if (ret < 0) {
|
|
BT_ERR("device init wakeup failed!\n");
|
|
goto err1;
|
|
}
|
|
ret = dev_pm_set_wake_irq(dev, gpio_to_irq(bsi->host_wake));
|
|
if (ret < 0) {
|
|
BT_ERR("can't enable wakeup src for bt_hostwake %d\n",
|
|
bsi->host_wake);
|
|
goto err2;
|
|
}
|
|
bsi->wakeup_enable = 1;
|
|
#else
|
|
BT_ERR("%s kernel unsupport this feature!\r\n", __func__);
|
|
#endif
|
|
}
|
|
|
|
bsi->ext_wake = of_get_named_gpio_flags(np, "bt_wake", 0, &config);
|
|
if (!gpio_is_valid(bsi->ext_wake)) {
|
|
BT_ERR("get gpio bt_wake failed\n");
|
|
ret = -EINVAL;
|
|
goto err2;
|
|
}
|
|
|
|
ret = devm_gpio_request(dev, bsi->ext_wake, "bt_wake");
|
|
if (ret < 0) {
|
|
BT_ERR("can't request bt_wake gpio %d\n",
|
|
bsi->ext_wake);
|
|
goto err2;
|
|
}
|
|
|
|
/* set ext_wake_assert */
|
|
bsi->ext_wake_assert = (config == OF_GPIO_ACTIVE_LOW) ? 0 : 1;
|
|
BT_DBG("bt_wake gpio=%d assert=%d\n", bsi->ext_wake, bsi->ext_wake_assert);
|
|
|
|
if (assert_level != -1) {
|
|
bsi->ext_wake_assert = (assert_level & 0x01) > 0;
|
|
BT_DBG("override ext_wake assert to %d", bsi->ext_wake_assert);
|
|
}
|
|
|
|
/* 1.set bt_wake as output and the level is assert, assert bt wake */
|
|
ret = gpio_direction_output(bsi->ext_wake, bsi->ext_wake_assert);
|
|
if (ret < 0) {
|
|
BT_ERR("can't request output direction bt_wake gpio %d\n",
|
|
bsi->ext_wake);
|
|
goto err3;
|
|
}
|
|
/*set ext_wake deassert as default*/
|
|
gpio_set_value(bsi->ext_wake, !bsi->ext_wake_assert);
|
|
|
|
/* 2.get bt_host_wake gpio irq */
|
|
bsi->host_wake_irq = gpio_to_irq(bsi->host_wake);
|
|
if (bsi->host_wake_irq < 0) {
|
|
BT_ERR("map gpio [%d] to virq failed, errno = %d\n",
|
|
bsi->host_wake, bsi->host_wake_irq);
|
|
ret = -ENODEV;
|
|
goto err3;
|
|
}
|
|
|
|
uart_index = DEFAULT_UART_INDEX;
|
|
if (!of_property_read_u32(np, "uart_index", &val)) {
|
|
switch (val) {
|
|
case 0:
|
|
case 1:
|
|
case 2:
|
|
uart_index = val;
|
|
break;
|
|
default:
|
|
BT_ERR("unsupported uart_index (%u)\n", val);
|
|
}
|
|
}
|
|
BT_DBG("uart_index (%u)\n", uart_index);
|
|
bluesleep_uart_dev = sw_uart_get_pdev(uart_index);
|
|
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0)
|
|
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 4, 0)
|
|
bsi->ws = wakeup_source_register(dev, "bluesleep");
|
|
#else
|
|
bsi->ws = wakeup_source_register("bluesleep");
|
|
#endif
|
|
|
|
#else
|
|
wake_lock_init(&bsi->wake_lock, WAKE_LOCK_SUSPEND, "bluesleep");
|
|
#endif
|
|
bsi->pdev = pdev;
|
|
|
|
return 0;
|
|
|
|
err3:
|
|
devm_gpio_free(dev, bsi->ext_wake);
|
|
err2:
|
|
device_init_wakeup(dev, false);
|
|
err1:
|
|
devm_gpio_free(dev, bsi->host_wake);
|
|
err0:
|
|
devm_kfree(dev, bsi);
|
|
|
|
BT_ERR("probe fail, err: %d", ret);
|
|
return ret;
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static int bluesleep_remove(struct platform_device *pdev)
|
|
{
|
|
/* assert bt wake */
|
|
gpio_set_value(bsi->ext_wake, bsi->ext_wake_assert);
|
|
if (test_bit(BT_PROTO, &flags)) {
|
|
if (disable_irq_wake(bsi->host_wake_irq))
|
|
BT_ERR("Couldn't disable hostwake IRQ wakeup mode\n");
|
|
free_irq(bsi->host_wake_irq, &bsi->pdev->dev);
|
|
del_timer(&rx_timer);
|
|
if (test_bit(BT_ASLEEP, &flags))
|
|
hsuart_power(1);
|
|
}
|
|
gpio_free(bsi->host_wake);
|
|
gpio_free(bsi->ext_wake);
|
|
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0)
|
|
wakeup_source_unregister(bsi->ws);
|
|
#else
|
|
wake_lock_destroy(&bsi->wake_lock);
|
|
#endif
|
|
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0)
|
|
if (bsi->wakeup_enable) {
|
|
BT_DBG("Deinit wakeup source");
|
|
device_init_wakeup(&pdev->dev, false);
|
|
dev_pm_clear_wake_irq(&pdev->dev);
|
|
}
|
|
#else
|
|
BT_ERR("%s kernel unsupport this feature!\r\n", __func__);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Initializes the module.
|
|
* @return On success, 0. On error, -1, and <code>errno</code> is set
|
|
* appropriately.
|
|
*/
|
|
int bluesleep_init(struct platform_device *pdev)
|
|
{
|
|
int retval;
|
|
struct proc_dir_entry *ent;
|
|
|
|
BT_DBG("BlueSleep Mode Driver Ver %s", VERSION);
|
|
|
|
#if 1
|
|
retval = bluesleep_probe(pdev);
|
|
if (retval)
|
|
return retval;
|
|
#endif
|
|
|
|
#if !BT_BLUEDROID_SUPPORT
|
|
bluesleep_hdev = NULL;
|
|
#endif
|
|
|
|
bluetooth_dir = proc_mkdir("bluetooth", NULL);
|
|
if (bluetooth_dir == NULL) {
|
|
BT_ERR("Unable to create /proc/bluetooth directory");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
sleep_dir = proc_mkdir("sleep", bluetooth_dir);
|
|
if (sleep_dir == NULL) {
|
|
BT_ERR("Unable to create /proc/%s directory", PROC_DIR);
|
|
return -ENOMEM;
|
|
}
|
|
#if 0
|
|
/* Creating read/write "btwake" entry */
|
|
ent = create_proc_entry("btwake", 0, sleep_dir);
|
|
if (ent == NULL) {
|
|
BT_ERR("Unable to create /proc/%s/btwake entry", PROC_DIR);
|
|
retval = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
ent->read_proc = bluepower_read_proc_btwake;
|
|
ent->write_proc = bluepower_write_proc_btwake;
|
|
|
|
/* read only proc entries */
|
|
if (create_proc_read_entry("hostwake", 0, sleep_dir,
|
|
bluepower_read_proc_hostwake, NULL) == NULL) {
|
|
BT_ERR("Unable to create /proc/%s/hostwake entry", PROC_DIR);
|
|
retval = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
/* read/write proc entries */
|
|
ent = create_proc_entry("proto", 0666, sleep_dir);
|
|
if (ent == NULL) {
|
|
BT_ERR("Unable to create /proc/%s/proto entry", PROC_DIR);
|
|
retval = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
ent->read_proc = bluesleep_read_proc_proto;
|
|
ent->write_proc = bluesleep_write_proc_proto;
|
|
|
|
/* read only proc entries */
|
|
if (create_proc_read_entry("asleep", 0,
|
|
sleep_dir, bluesleep_read_proc_asleep, NULL) == NULL) {
|
|
BT_ERR("Unable to create /proc/%s/asleep entry", PROC_DIR);
|
|
retval = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
#endif
|
|
#if BT_BLUEDROID_SUPPORT
|
|
/* read/write proc entries */
|
|
ent = proc_create("lpm", 0660, sleep_dir, &lpm_fops);
|
|
if (ent == NULL) {
|
|
BT_ERR("Unable to create /proc/%s/lpm entry", PROC_DIR);
|
|
retval = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
ent = proc_create("btwrite", 0660, sleep_dir, &btwrite_fops);
|
|
if (ent == NULL) {
|
|
BT_ERR("Unable to create /proc/%s/btwrite entry", PROC_DIR);
|
|
retval = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
#endif
|
|
|
|
flags = 0; /* clear all status bits */
|
|
|
|
/* Initialize spinlock. */
|
|
spin_lock_init(&rw_lock);
|
|
|
|
/* Initialize timer */
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0)
|
|
timer_setup(&rx_timer, bluesleep_rx_timer_expire, 0);
|
|
#else
|
|
init_timer(&rx_timer);
|
|
rx_timer.function = bluesleep_rx_timer_expire;
|
|
rx_timer.data = 0;
|
|
#endif
|
|
|
|
/* initialize host wake tasklet */
|
|
tasklet_init(&hostwake_task, bluesleep_hostwake_task, 0);
|
|
|
|
#if !BT_BLUEDROID_SUPPORT
|
|
hci_register_notifier(&hci_event_nblock);
|
|
#endif
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
#if BT_BLUEDROID_SUPPORT
|
|
remove_proc_entry("btwrite", sleep_dir);
|
|
remove_proc_entry("lpm", sleep_dir);
|
|
#endif
|
|
#if 0
|
|
remove_proc_entry("asleep", sleep_dir);
|
|
remove_proc_entry("proto", sleep_dir);
|
|
remove_proc_entry("hostwake", sleep_dir);
|
|
remove_proc_entry("btwake", sleep_dir);
|
|
#endif
|
|
remove_proc_entry("sleep", bluetooth_dir);
|
|
remove_proc_entry("bluetooth", 0);
|
|
return retval;
|
|
}
|
|
|
|
/**
|
|
* Cleans up the module.
|
|
*/
|
|
int bluesleep_exit(struct platform_device *dev)
|
|
{
|
|
#if !BT_BLUEDROID_SUPPORT
|
|
hci_unregister_notifier(&hci_event_nblock);
|
|
#endif
|
|
|
|
#if BT_BLUEDROID_SUPPORT
|
|
remove_proc_entry("btwrite", sleep_dir);
|
|
remove_proc_entry("lpm", sleep_dir);
|
|
#endif
|
|
#if 0
|
|
remove_proc_entry("asleep", sleep_dir);
|
|
remove_proc_entry("proto", sleep_dir);
|
|
remove_proc_entry("hostwake", sleep_dir);
|
|
remove_proc_entry("btwake", sleep_dir);
|
|
#endif
|
|
remove_proc_entry("sleep", bluetooth_dir);
|
|
remove_proc_entry("bluetooth", 0);
|
|
bluesleep_remove(dev);
|
|
return 0;
|
|
}
|
|
|