mirror of https://github.com/OpenIPC/firmware.git
1002 lines
25 KiB
Diff
1002 lines
25 KiB
Diff
diff -drupN a/drivers/bluetooth/bcm_btlpm.c b/drivers/bluetooth/bcm_btlpm.c
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--- a/drivers/bluetooth/bcm_btlpm.c 1970-01-01 03:00:00.000000000 +0300
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+++ b/drivers/bluetooth/bcm_btlpm.c 2022-06-12 05:28:14.000000000 +0300
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@@ -0,0 +1,997 @@
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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 version 2 as
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+ * published by the Free Software Foundation.
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+
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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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+ * Copyright (C) 2006-2007 - Motorola
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+ * Copyright (c) 2008-2010, Code Aurora Forum. All rights reserved.
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+ *
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+ * Date Author Comment
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+ * ----------- -------------- --------------------------------
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+ * 2006-Apr-28 Motorola The kernel module for running the Bluetooth(R)
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+ * Sleep-Mode Protocol from the Host side
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+ * 2006-Sep-08 Motorola Added workqueue for handling sleep work.
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+ * 2007-Jan-24 Motorola Added mbm_handle_ioi() call to ISR.
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+ *
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+ */
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+
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+#define DEBUG
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+
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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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+
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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/wakelock.h>
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+#include <linux/gpio.h>
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+#include <linux/sunxi-gpio.h>
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+#include <linux/of_gpio.h>
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+
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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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+#include "hci_uart.h"
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+
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+#include "../tty/serial/sunxi-uart.h"
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+
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+/*
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+ * #define BT_SLEEP_DBG
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+ */
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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_err("[BT_LPM] %s: " fmt "\n",\
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+ __func__, ## arg)
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+
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+/*
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+ * Defines
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+ */
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+
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+#define VERSION "1.3"
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+#define PROC_DIR "bluetooth/sleep"
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+
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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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+
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+struct bluesleep_info {
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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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+ struct wake_lock wake_lock;
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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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+};
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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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+
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+/* work queue */
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+DECLARE_DELAYED_WORK(sleep_workqueue, bluesleep_sleep_work);
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+
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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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+
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+/* 1 second timeout */
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+#define RX_TIMER_INTERVAL 1
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+
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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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+
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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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+
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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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+
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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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+/*
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+ * Local function prototypes
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+ */
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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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+/*
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+ * Global variables
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+ */
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+
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+/** Global state flags */
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+static unsigned long flags;
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+
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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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+
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+/** Reception timer */
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+static void bluesleep_rx_timer_expire(unsigned long data);
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+static struct timer_list rx_timer;
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+
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+/** Lock for state transitions */
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+static spinlock_t rw_lock;
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+
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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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+
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+struct proc_dir_entry *bluetooth_dir, *sleep_dir;
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+extern int enable_gpio_wakeup_src(int para);
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+
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+/*
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+ * Local functions
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+ */
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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 (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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+}
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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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+/**
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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 (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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+ wake_lock_timeout(&bsi->wake_lock, HZ / 2);
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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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+ wake_lock(&bsi->wake_lock);
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+ clear_bit(BT_ASLEEP, &flags);
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+
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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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+
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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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+ BT_DBG("do nothing\n");
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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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+
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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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+
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+ spin_unlock(&rw_lock);
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+}
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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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+
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+ spin_lock_irqsave(&rw_lock, irq_flags);
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+
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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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+ wake_lock(&bsi->wake_lock);
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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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+ power_on_uart = 1;
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+ }
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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+ if (count < 1)
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+ return -EINVAL;
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+
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+ if (copy_from_user(&b, buffer, 1))
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+ return -EFAULT;
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+
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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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+
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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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+
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+ return count;
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+}
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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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+
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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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+
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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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+
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+ if (count < 1)
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+ return -EINVAL;
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+
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+ if (copy_from_user(&b, buffer, 1))
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+ return -EFAULT;
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+
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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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+
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+ return count;
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+}
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+
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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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+#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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+
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+ if (!hdev)
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+ return NOTIFY_DONE;
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+
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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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+
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+ return NOTIFY_DONE;
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+}
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+#endif
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+
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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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+ bluesleep_tx_idle();
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+ spin_unlock_irqrestore(&rw_lock, irq_flags);
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+}
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+
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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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+static void bluesleep_rx_timer_expire(unsigned long data)
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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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+/**
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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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+/**
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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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+
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+ spin_lock_irqsave(&rw_lock, irq_flags);
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+
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+ if (test_bit(BT_PROTO, &flags)) {
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+ spin_unlock_irqrestore(&rw_lock, irq_flags);
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+ return 0;
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+ }
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+
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+ spin_unlock_irqrestore(&rw_lock, irq_flags);
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+
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+ if (!atomic_dec_and_test(&open_count)) {
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+ atomic_inc(&open_count);
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+ return -EBUSY;
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+ }
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+
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+ /* start the timer */
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+ mod_timer(&rx_timer, jiffies + (RX_TIMER_INTERVAL*HZ));
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+
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|
+ /* 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 | IRQF_NO_SUSPEND,
|
|
+ "bluetooth hostwake", NULL);
|
|
+ if (retval < 0) {
|
|
+ BT_ERR("Couldn't acquire BT_HOST_WAKE IRQ");
|
|
+ goto fail;
|
|
+ }
|
|
+
|
|
+ retval = enable_irq_wake(bsi->host_wake_irq);
|
|
+ if (retval < 0) {
|
|
+ BT_ERR("Couldn't enable BT_HOST_WAKE as wakeup interrupt");
|
|
+ free_irq(bsi->host_wake_irq, NULL);
|
|
+ goto fail;
|
|
+ }
|
|
+
|
|
+ set_bit(BT_PROTO, &flags);
|
|
+ wake_lock(&bsi->wake_lock);
|
|
+
|
|
+ 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);
|
|
+ if (disable_irq_wake(bsi->host_wake_irq))
|
|
+ BT_ERR("Couldn't disable hostwake IRQ wakeup mode\n");
|
|
+ free_irq(bsi->host_wake_irq, NULL);
|
|
+ wake_lock_timeout(&bsi->wake_lock, HZ / 2);
|
|
+}
|
|
+#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 __init bluesleep_probe(struct platform_device *pdev)
|
|
+{
|
|
+ struct device_node *np = pdev->dev.of_node;
|
|
+ struct device *dev = &pdev->dev;
|
|
+ struct gpio_config 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, (enum of_gpio_flags *)&config);
|
|
+ if (!gpio_is_valid(bsi->host_wake)) {
|
|
+ BT_ERR("get gpio bt_hostwake failed\n");
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ BT_DBG(
|
|
+ "bt_hostwake gpio=%d mul-sel=%d pull=%d drv_level=%d data=%d\n",
|
|
+ config.gpio,
|
|
+ config.mul_sel,
|
|
+ config.pull,
|
|
+ config.drv_level,
|
|
+ config.data);
|
|
+
|
|
+ /* set host_wake_assert */
|
|
+ bsi->host_wake_assert = config.data;
|
|
+
|
|
+ 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);
|
|
+ return ret;
|
|
+ }
|
|
+ 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);
|
|
+ return ret;
|
|
+ }
|
|
+
|
|
+ ret = enable_gpio_wakeup_src(bsi->host_wake);
|
|
+ if (ret < 0) {
|
|
+ BT_ERR("can't enable wakeup src for bt_hostwake %d\n",
|
|
+ bsi->host_wake);
|
|
+ return ret;
|
|
+ }
|
|
+
|
|
+ bsi->ext_wake = of_get_named_gpio_flags(np, "bt_wake",
|
|
+ 0, (enum of_gpio_flags *)&config);
|
|
+ if (!gpio_is_valid(bsi->ext_wake)) {
|
|
+ BT_ERR("get gpio bt_wake failed\n");
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ BT_DBG(
|
|
+ "bt_wake gpio=%d mul-sel=%d pull=%d drv_level=%d data=%d\n",
|
|
+ config.gpio,
|
|
+ config.mul_sel,
|
|
+ config.pull,
|
|
+ config.drv_level,
|
|
+ config.data);
|
|
+
|
|
+ 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);
|
|
+ return ret;
|
|
+ }
|
|
+
|
|
+ /* set ext_wake_assert */
|
|
+ bsi->ext_wake_assert = config.data;
|
|
+
|
|
+ /* 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);
|
|
+ return ret;
|
|
+ }
|
|
+
|
|
+ /* 2.get bt_host_wake gpio irq */
|
|
+ bsi->host_wake_irq = gpio_to_irq(bsi->host_wake);
|
|
+ if (IS_ERR_VALUE(bsi->host_wake_irq)) {
|
|
+ BT_ERR("map gpio [%d] to virq failed, errno = %d\n",
|
|
+ bsi->host_wake, bsi->host_wake_irq);
|
|
+ ret = -ENODEV;
|
|
+ return ret;
|
|
+ }
|
|
+
|
|
+ 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);
|
|
+
|
|
+ wake_lock_init(&bsi->wake_lock, WAKE_LOCK_SUSPEND, "bluesleep");
|
|
+ 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, NULL);
|
|
+ del_timer(&rx_timer);
|
|
+ if (test_bit(BT_ASLEEP, &flags))
|
|
+ hsuart_power(1);
|
|
+ }
|
|
+
|
|
+ wake_lock_destroy(&bsi->wake_lock);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static const struct of_device_id sunxi_btlpm_ids[] = {
|
|
+ { .compatible = "allwinner,sunxi-btlpm" },
|
|
+ { /* Sentinel */ }
|
|
+};
|
|
+
|
|
+static struct platform_driver bluesleep_driver = {
|
|
+ .remove = bluesleep_remove,
|
|
+ .driver = {
|
|
+ .owner = THIS_MODULE,
|
|
+ .name = "sunxi-btlpm",
|
|
+ .of_match_table = sunxi_btlpm_ids,
|
|
+ },
|
|
+};
|
|
+
|
|
+/**
|
|
+ * Initializes the module.
|
|
+ * @return On success, 0. On error, -1, and <code>errno</code> is set
|
|
+ * appropriately.
|
|
+ */
|
|
+static int __init bluesleep_init(void)
|
|
+{
|
|
+ int retval;
|
|
+ struct proc_dir_entry *ent;
|
|
+
|
|
+ BT_DBG("BlueSleep Mode Driver Ver %s", VERSION);
|
|
+
|
|
+ retval = platform_driver_probe(&bluesleep_driver, bluesleep_probe);
|
|
+ if (retval)
|
|
+ return retval;
|
|
+
|
|
+#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 */
|
|
+ init_timer(&rx_timer);
|
|
+ rx_timer.function = bluesleep_rx_timer_expire;
|
|
+ rx_timer.data = 0;
|
|
+
|
|
+ /* 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.
|
|
+ */
|
|
+static void __exit bluesleep_exit(void)
|
|
+{
|
|
+#if !BT_BLUEDROID_SUPPORT
|
|
+ hci_unregister_notifier(&hci_event_nblock);
|
|
+#endif
|
|
+ platform_driver_unregister(&bluesleep_driver);
|
|
+
|
|
+#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);
|
|
+}
|
|
+
|
|
+module_init(bluesleep_init);
|
|
+module_exit(bluesleep_exit);
|
|
+
|
|
+MODULE_DESCRIPTION("Bluetooth Sleep Mode Driver ver %s " VERSION);
|
|
+#ifdef MODULE_LICENSE
|
|
+MODULE_LICENSE("GPL");
|
|
+#endif
|