diff options
Diffstat (limited to 'drivers/bluetooth')
| -rw-r--r-- | drivers/bluetooth/hci_bcm.c | 160 |
1 files changed, 150 insertions, 10 deletions
diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c index fbad52f..f306541 100644 --- a/drivers/bluetooth/hci_bcm.c +++ b/drivers/bluetooth/hci_bcm.c @@ -31,6 +31,7 @@ #include <linux/clk.h> #include <linux/gpio/consumer.h> #include <linux/tty.h> +#include <linux/interrupt.h> #include <net/bluetooth/bluetooth.h> #include <net/bluetooth/hci_core.h> @@ -51,6 +52,8 @@ struct bcm_device { bool clk_enabled; u32 init_speed; + int irq; + u8 irq_polarity; #ifdef CONFIG_PM_SLEEP struct hci_uart *hu; @@ -149,6 +152,86 @@ static int bcm_gpio_set_power(struct bcm_device *dev, bool powered) return 0; } +#ifdef CONFIG_PM_SLEEP +static irqreturn_t bcm_host_wake(int irq, void *data) +{ + struct bcm_device *bdev = data; + + bt_dev_dbg(bdev, "Host wake IRQ"); + + return IRQ_HANDLED; +} + +static int bcm_request_irq(struct bcm_data *bcm) +{ + struct bcm_device *bdev = bcm->dev; + int err = 0; + + /* If this is not a platform device, do not enable PM functionalities */ + mutex_lock(&bcm_device_lock); + if (!bcm_device_exists(bdev)) { + err = -ENODEV; + goto unlock; + } + + if (bdev->irq > 0) { + err = devm_request_irq(&bdev->pdev->dev, bdev->irq, + bcm_host_wake, IRQF_TRIGGER_RISING, + "host_wake", bdev); + if (err) + goto unlock; + + device_init_wakeup(&bdev->pdev->dev, true); + } + +unlock: + mutex_unlock(&bcm_device_lock); + + return err; +} + +static const struct bcm_set_sleep_mode default_sleep_params = { + .sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */ + .idle_host = 2, /* idle threshold HOST, in 300ms */ + .idle_dev = 2, /* idle threshold device, in 300ms */ + .bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */ + .host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */ + .allow_host_sleep = 1, /* Allow host sleep in SCO flag */ + .combine_modes = 0, /* Combine sleep and LPM flag */ + .tristate_control = 0, /* Allow tri-state control of UART tx flag */ + /* Irrelevant USB flags */ + .usb_auto_sleep = 0, + .usb_resume_timeout = 0, + .pulsed_host_wake = 0, + .break_to_host = 0 +}; + +static int bcm_setup_sleep(struct hci_uart *hu) +{ + struct bcm_data *bcm = hu->priv; + struct sk_buff *skb; + struct bcm_set_sleep_mode sleep_params = default_sleep_params; + + sleep_params.host_wake_active = !bcm->dev->irq_polarity; + + skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params), + &sleep_params, HCI_INIT_TIMEOUT); + if (IS_ERR(skb)) { + int err = PTR_ERR(skb); + bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err); + return err; + } + kfree_skb(skb); + + bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded"); + + return 0; +} +#else +static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; } +static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; } +#endif + static int bcm_open(struct hci_uart *hu) { struct bcm_data *bcm; @@ -178,13 +261,11 @@ static int bcm_open(struct hci_uart *hu) #ifdef CONFIG_PM_SLEEP dev->hu = hu; #endif + bcm_gpio_set_power(bcm->dev, true); break; } } - if (bcm->dev) - bcm_gpio_set_power(bcm->dev, true); - mutex_unlock(&bcm_device_lock); return 0; @@ -193,15 +274,21 @@ static int bcm_open(struct hci_uart *hu) static int bcm_close(struct hci_uart *hu) { struct bcm_data *bcm = hu->priv; + struct bcm_device *bdev = bcm->dev; bt_dev_dbg(hu->hdev, "hu %p", hu); /* Protect bcm->dev against removal of the device or driver */ mutex_lock(&bcm_device_lock); - if (bcm_device_exists(bcm->dev)) { - bcm_gpio_set_power(bcm->dev, false); + if (bcm_device_exists(bdev)) { + bcm_gpio_set_power(bdev, false); #ifdef CONFIG_PM_SLEEP - bcm->dev->hu = NULL; + if (device_can_wakeup(&bdev->pdev->dev)) { + devm_free_irq(&bdev->pdev->dev, bdev->irq, bdev); + device_init_wakeup(&bdev->pdev->dev, false); + } + + bdev->hu = NULL; #endif } mutex_unlock(&bcm_device_lock); @@ -227,6 +314,7 @@ static int bcm_flush(struct hci_uart *hu) static int bcm_setup(struct hci_uart *hu) { + struct bcm_data *bcm = hu->priv; char fw_name[64]; const struct firmware *fw; unsigned int speed; @@ -281,6 +369,12 @@ finalize: release_firmware(fw); err = btbcm_finalize(hu->hdev); + if (err) + return err; + + err = bcm_request_irq(bcm); + if (!err) + err = bcm_setup_sleep(hu); return err; } @@ -335,6 +429,7 @@ static struct sk_buff *bcm_dequeue(struct hci_uart *hu) static int bcm_suspend(struct device *dev) { struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev)); + int error; bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended); @@ -357,6 +452,12 @@ static int bcm_suspend(struct device *dev) mdelay(15); } + if (device_may_wakeup(&bdev->pdev->dev)) { + error = enable_irq_wake(bdev->irq); + if (!error) + bt_dev_dbg(bdev, "BCM irq: enabled"); + } + unlock: mutex_unlock(&bcm_device_lock); @@ -375,6 +476,11 @@ static int bcm_resume(struct device *dev) if (!bdev->hu) goto unlock; + if (device_may_wakeup(&bdev->pdev->dev)) { + disable_irq_wake(bdev->irq); + bt_dev_dbg(bdev, "BCM irq: disabled"); + } + if (bdev->device_wakeup) { gpiod_set_value(bdev->device_wakeup, true); bt_dev_dbg(bdev, "resume, delaying 15 ms"); @@ -397,10 +503,12 @@ unlock: static const struct acpi_gpio_params device_wakeup_gpios = { 0, 0, false }; static const struct acpi_gpio_params shutdown_gpios = { 1, 0, false }; +static const struct acpi_gpio_params host_wakeup_gpios = { 2, 0, false }; static const struct acpi_gpio_mapping acpi_bcm_default_gpios[] = { { "device-wakeup-gpios", &device_wakeup_gpios, 1 }, { "shutdown-gpios", &shutdown_gpios, 1 }, + { "host-wakeup-gpios", &host_wakeup_gpios, 1 }, { }, }; @@ -408,13 +516,30 @@ static const struct acpi_gpio_mapping acpi_bcm_default_gpios[] = { static int bcm_resource(struct acpi_resource *ares, void *data) { struct bcm_device *dev = data; - - if (ares->type == ACPI_RESOURCE_TYPE_SERIAL_BUS) { - struct acpi_resource_uart_serialbus *sb; - + struct acpi_resource_extended_irq *irq; + struct acpi_resource_gpio *gpio; + struct acpi_resource_uart_serialbus *sb; + + switch (ares->type) { + case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: + irq = &ares->data.extended_irq; + dev->irq_polarity = irq->polarity; + break; + + case ACPI_RESOURCE_TYPE_GPIO: + gpio = &ares->data.gpio; + if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) + dev->irq_polarity = gpio->polarity; + break; + + case ACPI_RESOURCE_TYPE_SERIAL_BUS: sb = &ares->data.uart_serial_bus; if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) dev->init_speed = sb->default_baud_rate; + break; + + default: + break; } /* Always tell the ACPI core to skip this resource */ @@ -453,6 +578,21 @@ static int bcm_acpi_probe(struct bcm_device *dev) if (IS_ERR(dev->shutdown)) return PTR_ERR(dev->shutdown); + /* IRQ can be declared in ACPI table as Interrupt or GpioInt */ + dev->irq = platform_get_irq(pdev, 0); + if (dev->irq <= 0) { + struct gpio_desc *gpio; + + gpio = devm_gpiod_get_optional(&pdev->dev, "host-wakeup", + GPIOD_IN); + if (IS_ERR(gpio)) + return PTR_ERR(gpio); + + dev->irq = gpiod_to_irq(gpio); + } + + dev_info(&pdev->dev, "BCM irq: %d\n", dev->irq); + /* Make sure at-least one of the GPIO is defined and that * a name is specified for this instance */ |