| /* |
| * Date Author Comment |
| * ----------- -------------- -------------------------------- |
| * 2006-Apr-28 Motorola The kernel module for running the Bluetooth(R) |
| * Sleep-Mode Protocol from the Host side |
| * 2006-Sep-08 Motorola Added workqueue for handling sleep work. |
| * 2007-Jan-24 Motorola Added mbm_handle_ioi() call to ISR. |
| * 2009-Aug-10 Motorola Changed "add_timer" to "mod_timer" to solve |
| * race when flurry of queued work comes in. |
| */ |
| |
| #define pr_fmt(fmt) "Bluetooth: %s: " fmt, __func__ |
| |
| #include <linux/module.h> /* kernel module definitions */ |
| #include <linux/errno.h> |
| #include <linux/init.h> |
| #include <linux/interrupt.h> |
| #include <linux/kernel.h> |
| #include <linux/notifier.h> |
| #include <linux/proc_fs.h> |
| #include <linux/spinlock.h> |
| #include <linux/timer.h> |
| #include <linux/uaccess.h> |
| #include <linux/version.h> |
| #include <linux/workqueue.h> |
| #include <linux/platform_device.h> |
| #include <linux/amlogic/aml_gpio_consumer.h> |
| #include <linux/irq.h> |
| #include <linux/ioport.h> |
| #include <linux/param.h> |
| #include <linux/bitops.h> |
| #include <linux/termios.h> |
| #include <linux/wakelock_android.h> |
| #include <linux/gpio.h> |
| #include <linux/of_gpio.h> |
| #include <linux/serial_core.h> |
| |
| #include <linux/of_irq.h> |
| /* #include <linux/platform_data/msm_serial_hs.h> */ |
| |
| #include <net/bluetooth/bluetooth.h> |
| #include <net/bluetooth/hci_core.h> /* event notifications */ |
| #include "../../bluetooth/hci_uart.h" |
| #include "bluesleep.h" |
| |
| #define BT_SLEEP_DBG |
| #ifndef BT_SLEEP_DBG |
| #define BT_DBG(fmt, arg...) |
| #endif |
| /* |
| * Defines |
| */ |
| |
| #define VERSION "1.2" |
| #define PROC_DIR "bluetooth/sleep" |
| #define BT_SLEEP "bluesleep" |
| |
| #define POLARITY_LOW 0 |
| #define POLARITY_HIGH 1 |
| |
| #define BT_PORT_ID 0 |
| |
| /* enable/disable wake-on-bluetooth */ |
| #define BT_ENABLE_IRQ_WAKE 0 |
| |
| #define BT_BLUEDROID_SUPPORT 1 |
| |
| enum { |
| DEBUG_USER_STATE = 1U << 0, |
| DEBUG_SUSPEND = 1U << 1, |
| DEBUG_BTWAKE = 1U << 2, |
| DEBUG_VERBOSE = 1U << 3, |
| }; |
| |
| static int debug_mask = DEBUG_USER_STATE; |
| //module_param_named(debug_mask, debug_mask, int, S_IRUGO | S_IWUSR | S_IWGRP); |
| module_param_named(debug_mask, debug_mask, int, 0664); |
| |
| struct bluesleep_info { |
| unsigned int host_wake; |
| unsigned int ext_wake; |
| unsigned int host_wake_irq; |
| struct uart_port *uport; |
| struct wake_lock wake_lock; |
| int irq_polarity; |
| int has_ext_wake; |
| }; |
| |
| /* work function */ |
| static void bluesleep_sleep_work(struct work_struct *work); |
| |
| /* work queue */ |
| DECLARE_DELAYED_WORK(sleep_workqueue, bluesleep_sleep_work); |
| |
| /* Macros for handling sleep work */ |
| #define bluesleep_rx_busy() schedule_delayed_work(&sleep_workqueue, 0) |
| #define bluesleep_tx_busy() schedule_delayed_work(&sleep_workqueue, 0) |
| #define bluesleep_rx_idle() schedule_delayed_work(&sleep_workqueue, 0) |
| #define bluesleep_tx_idle() schedule_delayed_work(&sleep_workqueue, 0) |
| |
| /* 5 second timeout */ |
| #define TX_TIMER_INTERVAL 5 |
| |
| /* state variable names and bit positions */ |
| #define BT_PROTO 0x01 |
| #define BT_TXDATA 0x02 |
| #define BT_ASLEEP 0x04 |
| #define BT_EXT_WAKE 0x08 |
| #define BT_SUSPEND 0x10 |
| |
| #define PROC_BTWAKE 0 |
| #define PROC_HOSTWAKE 1 |
| #define PROC_PROTO 2 |
| #define PROC_ASLEEP 3 |
| #if BT_BLUEDROID_SUPPORT |
| #define PROC_LPM 4 |
| #define PROC_BTWRITE 5 |
| #endif |
| |
| #if BT_BLUEDROID_SUPPORT |
| static bool has_lpm_enabled; |
| #else |
| /* global pointer to a single hci device. */ |
| static struct hci_dev *bluesleep_hdev; |
| #endif |
| |
| static struct platform_device *bluesleep_uart_dev; |
| static struct bluesleep_info *bsi; |
| static int bt_port_id = 1; |
| |
| /* module usage */ |
| static atomic_t open_count = ATOMIC_INIT(1); |
| |
| /* |
| * Local function prototypes |
| */ |
| #if !BT_BLUEDROID_SUPPORT |
| static int bluesleep_hci_event(struct notifier_block *this, |
| unsigned long event, void *data); |
| #endif |
| static int bluesleep_start(void); |
| static void bluesleep_stop(void); |
| |
| /* |
| * Global variables |
| */ |
| |
| /** Global state flags */ |
| static unsigned long flags; |
| |
| /** Tasklet to respond to change in hostwake line */ |
| static struct tasklet_struct hostwake_task; |
| |
| /** Transmission timer */ |
| static void bluesleep_tx_timer_expire(unsigned long data); |
| static DEFINE_TIMER(tx_timer, bluesleep_tx_timer_expire, 0, 0); |
| |
| /** Lock for state transitions */ |
| static spinlock_t rw_lock; |
| |
| #if !BT_BLUEDROID_SUPPORT |
| /** Notifier block for HCI events */ |
| struct notifier_block hci_event_nblock = { |
| .notifier_call = bluesleep_hci_event, |
| }; |
| #endif |
| |
| struct proc_dir_entry *bluetooth_dir, *sleep_dir; |
| |
| /* |
| * Local functions |
| */ |
| |
| static void hsuart_power(int on) |
| { |
| } |
| |
| /** |
| * @return 1 if the Host can go to sleep, 0 otherwise. |
| */ |
| int bluesleep_can_sleep(void) |
| { |
| /* check if WAKE_BT_GPIO and BT_WAKE_GPIO are both deasserted */ |
| return (gpio_get_value(bsi->host_wake) != bsi->irq_polarity) && |
| (test_bit(BT_EXT_WAKE, &flags)) && |
| (bsi->uport != NULL); |
| } |
| |
| void bluesleep_sleep_wakeup(void) |
| { |
| if (test_bit(BT_ASLEEP, &flags)) { |
| if (debug_mask & DEBUG_SUSPEND) |
| pr_info("waking up...\n"); |
| wake_lock(&bsi->wake_lock); |
| /* Start the timer */ |
| mod_timer(&tx_timer, jiffies + (TX_TIMER_INTERVAL * HZ)); |
| if (debug_mask & DEBUG_BTWAKE) |
| pr_info("BT WAKE: set to wake\n"); |
| if (bsi->has_ext_wake == 1) |
| gpio_set_value(bsi->ext_wake, 1); |
| clear_bit(BT_EXT_WAKE, &flags); |
| clear_bit(BT_ASLEEP, &flags); |
| /*Activating UART */ |
| hsuart_power(1); |
| } |
| } |
| |
| /** |
| * @brief@ main sleep work handling function which update the flags |
| * and activate and deactivate UART ,check FIFO. |
| */ |
| static void bluesleep_sleep_work(struct work_struct *work) |
| { |
| if (bluesleep_can_sleep()) { |
| /* already asleep, this is an error case */ |
| if (test_bit(BT_ASLEEP, &flags)) { |
| if (debug_mask & DEBUG_SUSPEND) |
| pr_info("already asleep\n"); |
| return; |
| } |
| |
| if (bsi->uport->ops->tx_empty(bsi->uport)) { |
| if (debug_mask & DEBUG_SUSPEND) |
| pr_info("going to sleep...\n"); |
| set_bit(BT_ASLEEP, &flags); |
| /*Deactivating UART */ |
| hsuart_power(0); |
| /* UART clk is not turned off immediately. Release |
| * wakelock after 500 ms. |
| */ |
| wake_lock_timeout(&bsi->wake_lock, HZ / 2); |
| } else { |
| |
| mod_timer(&tx_timer, jiffies + (TX_TIMER_INTERVAL * HZ)); |
| return; |
| } |
| } else if (test_bit(BT_EXT_WAKE, &flags) |
| && !test_bit(BT_ASLEEP, &flags)) { |
| mod_timer(&tx_timer, jiffies + (TX_TIMER_INTERVAL * HZ)); |
| if (debug_mask & DEBUG_BTWAKE) |
| pr_info("BT WAKE: set to wake\n"); |
| if (bsi->has_ext_wake == 1) |
| gpio_set_value(bsi->ext_wake, 1); |
| clear_bit(BT_EXT_WAKE, &flags); |
| } else { |
| bluesleep_sleep_wakeup(); |
| } |
| } |
| |
| /** |
| * A tasklet function that runs in tasklet context and reads the value |
| * of the HOST_WAKE GPIO pin and further defer the work. |
| * @param data Not used. |
| */ |
| static void bluesleep_hostwake_task(unsigned long data) |
| { |
| if (debug_mask & DEBUG_SUSPEND) |
| pr_info("hostwake line change\n"); |
| |
| spin_lock(&rw_lock); |
| if (gpio_get_value(bsi->host_wake) == bsi->irq_polarity) |
| bluesleep_rx_busy(); |
| else |
| bluesleep_rx_idle(); |
| |
| spin_unlock(&rw_lock); |
| } |
| |
| /** |
| * Handles proper timer action when outgoing data is delivered to the |
| * HCI line discipline. Sets BT_TXDATA. |
| */ |
| static void bluesleep_outgoing_data(void) |
| { |
| unsigned long irq_flags; |
| |
| spin_lock_irqsave(&rw_lock, irq_flags); |
| |
| /* log data passing by */ |
| set_bit(BT_TXDATA, &flags); |
| |
| spin_unlock_irqrestore(&rw_lock, irq_flags); |
| |
| /* if the tx side is sleeping... */ |
| if (test_bit(BT_EXT_WAKE, &flags)) { |
| if (debug_mask & DEBUG_SUSPEND) |
| pr_info("tx was sleeping\n"); |
| bluesleep_sleep_wakeup(); |
| } |
| } |
| |
| |
| #if !BT_BLUEDROID_SUPPORT |
| /** |
| * Handles HCI device events. |
| * @param this Not used. |
| * @param event The event that occurred. |
| * @param data The HCI device associated with the event. |
| * @return <code>NOTIFY_DONE</code>. |
| */ |
| static int bluesleep_hci_event(struct notifier_block *this, |
| unsigned long event, void *data) |
| { |
| struct hci_dev *hdev = (struct hci_dev *) data; |
| struct hci_uart *hu; |
| struct uart_state *state; |
| |
| if (!hdev) |
| return NOTIFY_DONE; |
| |
| switch (event) { |
| case HCI_DEV_REG: |
| if (!bluesleep_hdev) { |
| bluesleep_hdev = hdev; |
| hu = (struct hci_uart *) hdev->driver_data; |
| state = (struct uart_state *) hu->tty->driver_data; |
| bsi->uport = state->uart_port; |
| /* if bluetooth started, start bluesleep*/ |
| bluesleep_start(); |
| } |
| break; |
| case HCI_DEV_UNREG: |
| bluesleep_stop(); |
| bluesleep_hdev = NULL; |
| bsi->uport = NULL; |
| /* if bluetooth stopped, stop bluesleep also */ |
| break; |
| case HCI_DEV_WRITE: |
| bluesleep_outgoing_data(); |
| break; |
| } |
| |
| return NOTIFY_DONE; |
| } |
| #endif |
| |
| /** |
| * Handles transmission timer expiration. |
| * @param data Not used. |
| */ |
| static void bluesleep_tx_timer_expire(unsigned long data) |
| { |
| unsigned long irq_flags; |
| |
| if (debug_mask & DEBUG_VERBOSE) |
| pr_info("Tx timer expired\n"); |
| |
| spin_lock_irqsave(&rw_lock, irq_flags); |
| |
| /* were we silent during the last timeout? */ |
| if (!test_bit(BT_TXDATA, &flags)) { |
| if (debug_mask & DEBUG_SUSPEND) |
| pr_info("Tx has been idle\n"); |
| if (debug_mask & DEBUG_BTWAKE) |
| pr_info("BT WAKE: set to sleep\n"); |
| if (bsi->has_ext_wake == 1) |
| gpio_set_value(bsi->ext_wake, 0); |
| set_bit(BT_EXT_WAKE, &flags); |
| bluesleep_tx_idle(); |
| } else { |
| if (debug_mask & DEBUG_SUSPEND) |
| pr_info("Tx data during last period\n"); |
| mod_timer(&tx_timer, jiffies + (TX_TIMER_INTERVAL*HZ)); |
| } |
| |
| /* clear the incoming data flag */ |
| clear_bit(BT_TXDATA, &flags); |
| |
| spin_unlock_irqrestore(&rw_lock, irq_flags); |
| } |
| |
| /** |
| * Schedules a tasklet to run when receiving an interrupt on the |
| * <code>HOST_WAKE</code> GPIO pin. |
| * @param irq Not used. |
| * @param dev_id Not used. |
| */ |
| static irqreturn_t bluesleep_hostwake_isr(int irq, void *dev_id) |
| { |
| /* schedule a tasklet to handle the change in the host wake line */ |
| tasklet_schedule(&hostwake_task); |
| return IRQ_HANDLED; |
| } |
| |
| /** |
| * Starts the Sleep-Mode Protocol on the Host. |
| * @return On success, 0. On error, -1, and <code>errno</code> is set |
| * appropriately. |
| */ |
| static int bluesleep_start(void) |
| { |
| int retval; |
| 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 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(&tx_timer, jiffies + (TX_TIMER_INTERVAL*HZ)); |
| |
| /* assert BT_WAKE */ |
| if (debug_mask & DEBUG_BTWAKE) |
| pr_info("BT WAKE: set to wake\n"); |
| if (bsi->has_ext_wake == 1) |
| gpio_set_value(bsi->ext_wake, 1); |
| clear_bit(BT_EXT_WAKE, &flags); |
| retval = request_irq(bsi->host_wake_irq, bluesleep_hostwake_isr, |
| IRQF_DISABLED, |
| "bluetooth hostwake", NULL); |
| if (retval < 0) { |
| BT_ERR("Couldn't acquire BT_HOST_WAKE IRQ"); |
| goto fail; |
| } |
| #if BT_ENABLE_IRQ_WAKE |
| retval = enable_irq_wake(bsi->host_wake_irq); |
| if (retval < 0) { |
| BT_ERR("Couldn't enable BT_HOST_WAKE as wakeup interrupt"); |
| goto fail; |
| } |
| #endif |
| set_bit(BT_PROTO, &flags); |
| wake_lock(&bsi->wake_lock); |
| return 0; |
| |
| fail: |
| del_timer(&tx_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 */ |
| if (debug_mask & DEBUG_BTWAKE) |
| pr_info("BT WAKE: set to wake\n"); |
| if (bsi->has_ext_wake == 1) |
| gpio_set_value(bsi->ext_wake, 1); |
| clear_bit(BT_EXT_WAKE, &flags); |
| del_timer(&tx_timer); |
| clear_bit(BT_PROTO, &flags); |
| |
| if (test_bit(BT_ASLEEP, &flags)) { |
| clear_bit(BT_ASLEEP, &flags); |
| spin_unlock_irqrestore(&rw_lock, irq_flags); |
| hsuart_power(1); |
| } else { |
| spin_unlock_irqrestore(&rw_lock, irq_flags); |
| } |
| |
| atomic_inc(&open_count); |
| |
| #if BT_ENABLE_IRQ_WAKE |
| if (disable_irq_wake(bsi->host_wake_irq)) |
| BT_ERR("Couldn't disable hostwake IRQ wakeup mode"); |
| #endif |
| free_irq(bsi->host_wake_irq, NULL); |
| wake_lock_timeout(&bsi->wake_lock, HZ / 2); |
| } |
| |
| void bluesleep_setup_uart_port(struct platform_device *uart_dev) |
| { |
| bluesleep_uart_dev = uart_dev; |
| } |
| |
| static int bluesleep_populate_dt_pinfo(struct platform_device *pdev) |
| { |
| struct device_node *np = pdev->dev.of_node; |
| int tmp; |
| const void *prop; |
| |
| tmp = of_get_named_gpio(np, "bt_host_wake", 0); |
| if (tmp < 0) { |
| BT_ERR("couldn't find host_wake gpio"); |
| return -ENODEV; |
| } |
| bsi->host_wake = tmp; |
| |
| tmp = of_get_named_gpio(np, "bt_ext_wake", 0); |
| if (tmp < 0) |
| bsi->has_ext_wake = 0; |
| else |
| bsi->has_ext_wake = 1; |
| |
| if (bsi->has_ext_wake) |
| bsi->ext_wake = tmp; |
| |
| prop = of_get_property(np, "bt_port_id", NULL); |
| if (prop) { |
| bt_port_id = of_read_ulong(prop, 1); |
| BT_INFO("bt port id is %d\n", bt_port_id); |
| } |
| |
| BT_INFO("bt_host_wake %d, bt_ext_wake %d", |
| bsi->host_wake, |
| bsi->ext_wake); |
| return 0; |
| } |
| |
| static int bluesleep_populate_pinfo(struct platform_device *pdev) |
| { |
| struct resource *res; |
| |
| res = platform_get_resource_byname(pdev, IORESOURCE_IO, |
| "gpio_host_wake"); |
| if (!res) { |
| BT_ERR("couldn't find host_wake gpio"); |
| return -ENODEV; |
| } |
| bsi->host_wake = res->start; |
| |
| res = platform_get_resource_byname(pdev, IORESOURCE_IO, |
| "gpio_ext_wake"); |
| if (!res) |
| bsi->has_ext_wake = 0; |
| else |
| bsi->has_ext_wake = 1; |
| |
| if (bsi->has_ext_wake) |
| bsi->ext_wake = res->start; |
| |
| return 0; |
| } |
| |
| static int bluesleep_probe(struct platform_device *pdev) |
| { |
| /* struct resource *res; */ |
| int ret; |
| |
| bsi = kzalloc(sizeof(struct bluesleep_info), GFP_KERNEL); |
| if (!bsi) |
| return -ENOMEM; |
| |
| if (pdev->dev.of_node) { |
| ret = bluesleep_populate_dt_pinfo(pdev); |
| if (ret < 0) { |
| BT_ERR("couldn't populate info from dt"); |
| return ret; |
| } |
| } else { |
| ret = bluesleep_populate_pinfo(pdev); |
| if (ret < 0) { |
| BT_ERR("couldn't populate info"); |
| return ret; |
| } |
| } |
| |
| /* configure host_wake as input */ |
| ret = gpio_request_one(bsi->host_wake, GPIOF_IN, "bt_host_wake"); |
| if (ret < 0) { |
| BT_ERR("failed to configure input direction for GPIO %d err %d", |
| bsi->host_wake, ret); |
| goto free_bsi; |
| } |
| |
| if (debug_mask & DEBUG_BTWAKE) |
| pr_info("BT WAKE: set to wake\n"); |
| if (bsi->has_ext_wake) { |
| /* configure ext_wake as output mode*/ |
| ret = gpio_request_one(bsi->ext_wake, |
| GPIOF_OUT_INIT_LOW, "bt_ext_wake"); |
| if (ret < 0) { |
| BT_ERR("failed to config output"); |
| BT_ERR(" for GPIO %d err %d", |
| bsi->ext_wake, ret); |
| goto free_bt_host_wake; |
| } |
| } |
| clear_bit(BT_EXT_WAKE, &flags); |
| |
| bsi->host_wake_irq = |
| irq_of_parse_and_map(pdev->dev.of_node, 0); |
| if (bsi->host_wake_irq == 0) { |
| BT_ERR("couldn't find host_wake irq"); |
| ret = -ENODEV; |
| goto free_bt_ext_wake; |
| } |
| |
| gpio_for_irq(bsi->host_wake, |
| AML_GPIO_IRQ(bsi->host_wake_irq, FILTER_NUM7, |
| GPIO_IRQ_FALLING)); |
| |
| bsi->irq_polarity = POLARITY_LOW;/*low edge (falling edge)*/ |
| |
| wake_lock_init(&bsi->wake_lock, |
| WAKE_LOCK_SUSPEND, "bluesleep"); |
| clear_bit(BT_SUSPEND, &flags); |
| |
| BT_INFO("host_wake_irq %d, polarity %d", |
| bsi->host_wake_irq, |
| bsi->irq_polarity); |
| |
| return 0; |
| |
| free_bt_ext_wake: |
| gpio_free(bsi->ext_wake); |
| free_bt_host_wake: |
| gpio_free(bsi->host_wake); |
| free_bsi: |
| kfree(bsi); |
| return ret; |
| } |
| |
| static int bluesleep_remove(struct platform_device *pdev) |
| { |
| gpio_free(bsi->host_wake); |
| gpio_free(bsi->ext_wake); |
| wake_lock_destroy(&bsi->wake_lock); |
| kfree(bsi); |
| return 0; |
| } |
| |
| |
| static int bluesleep_resume(struct platform_device *pdev) |
| { |
| if (test_bit(BT_SUSPEND, &flags)) { |
| if (debug_mask & DEBUG_SUSPEND) |
| pr_info("bluesleep resuming...\n"); |
| if ((bsi->uport != NULL) && |
| (gpio_get_value(bsi->host_wake) == bsi->irq_polarity)) { |
| if (debug_mask & DEBUG_SUSPEND) |
| pr_info("bluesleep resume from BT event...\n"); |
| } |
| clear_bit(BT_SUSPEND, &flags); |
| } |
| return 0; |
| } |
| |
| static int bluesleep_suspend(struct platform_device *pdev, pm_message_t state) |
| { |
| if (debug_mask & DEBUG_SUSPEND) |
| pr_info("bluesleep suspending...\n"); |
| set_bit(BT_SUSPEND, &flags); |
| return 0; |
| } |
| |
| static const struct of_device_id bluesleep_match_table[] = { |
| { .compatible = "amlogic, bluesleep" }, |
| {} |
| }; |
| |
| static struct platform_driver bluesleep_driver = { |
| .probe = bluesleep_probe, |
| .remove = bluesleep_remove, |
| .suspend = bluesleep_suspend, |
| .resume = bluesleep_resume, |
| .driver = { |
| .name = "bluesleep", |
| .owner = THIS_MODULE, |
| .of_match_table = bluesleep_match_table, |
| }, |
| }; |
| |
| static int bluesleep_proc_show(struct seq_file *m, void *v) |
| { |
| switch ((long)m->private) { |
| case PROC_BTWAKE: |
| seq_printf(m, "btwake: %u\n", test_bit(BT_EXT_WAKE, &flags)); |
| break; |
| case PROC_HOSTWAKE: |
| seq_printf(m, "hostwake: %u\n", gpio_get_value(bsi->host_wake)); |
| break; |
| case PROC_PROTO: |
| seq_printf(m, "proto: %u\n", |
| test_bit(BT_PROTO, &flags) ? 1 : 0); |
| break; |
| case PROC_ASLEEP: |
| seq_printf(m, "asleep: %u\n", |
| test_bit(BT_ASLEEP, &flags) ? 1 : 0); |
| break; |
| case PROC_LPM: |
| seq_printf(m, "lpm: %u\n", |
| has_lpm_enabled ? 1 : 0); |
| break; |
| case PROC_BTWRITE: |
| seq_printf(m, "lpm: %u\n", |
| test_bit(BT_TXDATA, &flags) ? 1 : 0); |
| break; |
| |
| default: |
| return 0; |
| } |
| return 0; |
| } |
| |
| static ssize_t bluesleep_proc_write(struct file *file, const char *buf, |
| size_t count, loff_t *pos) |
| { |
| void *data = PDE_DATA(file_inode(file)); |
| char lbuf[32]; |
| |
| if (count >= sizeof(lbuf)) |
| count = sizeof(lbuf)-1; |
| |
| if (copy_from_user(lbuf, buf, count)) |
| return -EFAULT; |
| lbuf[count] = 0; |
| |
| switch ((long)data) { |
| case PROC_BTWAKE: |
| if (lbuf[0] == '0') { |
| if (debug_mask & DEBUG_BTWAKE) |
| pr_info("BT WAKE: set to wake\n"); |
| if (bsi->has_ext_wake == 1) |
| gpio_set_value(bsi->ext_wake, 1); |
| clear_bit(BT_EXT_WAKE, &flags); |
| } else if (buf[0] == '1') { |
| if (debug_mask & DEBUG_BTWAKE) |
| pr_info("BT WAKE: set to sleep\n"); |
| if (bsi->has_ext_wake == 1) |
| gpio_set_value(bsi->ext_wake, 0); |
| set_bit(BT_EXT_WAKE, &flags); |
| } |
| break; |
| case PROC_PROTO: |
| if (lbuf[0] == '0') |
| bluesleep_stop(); |
| else |
| bluesleep_start(); |
| break; |
| case PROC_LPM: |
| if (lbuf[0] == '0') { |
| bluesleep_stop(); |
| has_lpm_enabled = false; |
| bsi->uport = NULL; |
| } else { |
| if (!has_lpm_enabled) { |
| has_lpm_enabled = true; |
| bsi->uport = get_uart_port(bt_port_id); |
| if (bsi->uport) |
| bluesleep_start(); |
| else |
| pr_info("bt port is null\n"); |
| } |
| } |
| break; |
| case PROC_BTWRITE: |
| if (lbuf[0] != '0' && bsi->uport) |
| bluesleep_outgoing_data(); |
| break; |
| default: |
| return 0; |
| } |
| |
| return count; |
| } |
| |
| static int bluesleep_proc_open(struct inode *inode, struct file *file) |
| { |
| return single_open(file, bluesleep_proc_show, PDE_DATA(inode)); |
| } |
| |
| static const struct file_operations bluesleep_proc_readwrite_fops = { |
| .owner = THIS_MODULE, |
| .open = bluesleep_proc_open, |
| .read = seq_read, |
| .write = bluesleep_proc_write, |
| .release = single_release, |
| }; |
| static const struct file_operations bluesleep_proc_read_fops = { |
| .owner = THIS_MODULE, |
| .open = bluesleep_proc_open, |
| .read = seq_read, |
| .release = single_release, |
| }; |
| |
| /** |
| * 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_INFO("BlueSleep Mode Driver Ver %s", VERSION); |
| |
| retval = platform_driver_register(&bluesleep_driver); |
| if (retval) |
| return retval; |
| |
| if (bsi == NULL) |
| return 0; |
| |
| #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; |
| } |
| |
| ent = proc_create_data("btwake", 0664, |
| sleep_dir, &bluesleep_proc_readwrite_fops, |
| (void *)PROC_BTWAKE); |
| if (ent == NULL) { |
| BT_ERR("Unable to create /proc/%s/btwake entry", PROC_DIR); |
| retval = -ENOMEM; |
| goto fail; |
| } |
| |
| ent = proc_create_data("hostwake", 0444, sleep_dir, |
| &bluesleep_proc_read_fops, |
| (void *)PROC_HOSTWAKE); |
| if (ent == NULL) { |
| BT_ERR("Unable to create /proc/%s/hostwake entry", PROC_DIR); |
| retval = -ENOMEM; |
| goto fail; |
| } |
| |
| ent = proc_create_data("proto", 0664, |
| sleep_dir, &bluesleep_proc_readwrite_fops, |
| (void *)PROC_PROTO); |
| if (ent == NULL) { |
| BT_ERR("Unable to create /proc/%s/proto entry", PROC_DIR); |
| retval = -ENOMEM; |
| goto fail; |
| } |
| |
| ent = proc_create_data("asleep", 0444, |
| sleep_dir, &bluesleep_proc_read_fops, |
| (void *)PROC_ASLEEP); |
| if (ent == NULL) { |
| BT_ERR("Unable to create /proc/%s/asleep entry", PROC_DIR); |
| retval = -ENOMEM; |
| goto fail; |
| } |
| |
| #if BT_BLUEDROID_SUPPORT |
| ent = proc_create_data("lpm", 0664, |
| sleep_dir, &bluesleep_proc_readwrite_fops, |
| (void *)PROC_LPM); |
| if (ent == NULL) { |
| BT_ERR("Unable to create /proc/%s/lpm entry", PROC_DIR); |
| retval = -ENOMEM; |
| goto fail; |
| } |
| |
| ent = proc_create_data("btwrite", 0664, |
| sleep_dir, &bluesleep_proc_readwrite_fops, |
| (void *)PROC_BTWRITE); |
| if (ent == NULL) { |
| BT_ERR("Unable to create /proc/%s/btwrite entry", PROC_DIR); |
| retval = -ENOMEM; |
| goto fail; |
| } |
| |
| #endif |
| |
| flags = 0; |
| |
| spin_lock_init(&rw_lock); |
| |
| init_timer(&tx_timer); |
| tx_timer.function = bluesleep_tx_timer_expire; |
| tx_timer.data = 0; |
| |
| tasklet_init(&hostwake_task, bluesleep_hostwake_task, 0); |
| |
| if (debug_mask & DEBUG_BTWAKE) |
| pr_info("BT WAKE: set to wake\n"); |
| if (bsi->has_ext_wake == 1) |
| gpio_set_value(bsi->ext_wake, 1); |
| clear_bit(BT_EXT_WAKE, &flags); |
| #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 |
| remove_proc_entry("asleep", sleep_dir); |
| remove_proc_entry("proto", sleep_dir); |
| remove_proc_entry("hostwake", sleep_dir); |
| remove_proc_entry("btwake", sleep_dir); |
| remove_proc_entry("sleep", bluetooth_dir); |
| remove_proc_entry("bluetooth", 0); |
| return retval; |
| } |
| |
| /** |
| * Cleans up the module. |
| */ |
| static void __exit bluesleep_exit(void) |
| { |
| if (bsi == NULL) |
| return; |
| |
| if (bsi->has_ext_wake == 1) |
| gpio_set_value(bsi->ext_wake, 1); |
| clear_bit(BT_EXT_WAKE, &flags); |
| if (test_bit(BT_PROTO, &flags)) { |
| if (disable_irq_wake(bsi->host_wake_irq)) |
| BT_ERR("Couldn't disable hostwake IRQ wakeup mode"); |
| free_irq(bsi->host_wake_irq, NULL); |
| del_timer(&tx_timer); |
| if (test_bit(BT_ASLEEP, &flags)) |
| hsuart_power(1); |
| } |
| |
| #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 |
| remove_proc_entry("asleep", sleep_dir); |
| remove_proc_entry("proto", sleep_dir); |
| remove_proc_entry("hostwake", sleep_dir); |
| remove_proc_entry("btwake", sleep_dir); |
| 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 |