#include <linux/gpio/consumer.h>
#include <linux/tty.h>
#include <linux/interrupt.h>
+#include <linux/dmi.h>
+#include <linux/pm_runtime.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
#include "btbcm.h"
#include "hci_uart.h"
+#define BCM_AUTOSUSPEND_DELAY 5000 /* default autosleep delay */
+
struct bcm_device {
struct list_head list;
int irq;
u8 irq_polarity;
-#ifdef CONFIG_PM_SLEEP
+#ifdef CONFIG_PM
struct hci_uart *hu;
bool is_suspended; /* suspend/resume flag */
#endif
return 0;
}
-#ifdef CONFIG_PM_SLEEP
+#ifdef CONFIG_PM
static irqreturn_t bcm_host_wake(int irq, void *data)
{
struct bcm_device *bdev = data;
bt_dev_dbg(bdev, "Host wake IRQ");
+ pm_runtime_get(&bdev->pdev->dev);
+ pm_runtime_mark_last_busy(&bdev->pdev->dev);
+ pm_runtime_put_autosuspend(&bdev->pdev->dev);
+
return IRQ_HANDLED;
}
goto unlock;
device_init_wakeup(&bdev->pdev->dev, true);
+
+ pm_runtime_set_autosuspend_delay(&bdev->pdev->dev,
+ BCM_AUTOSUSPEND_DELAY);
+ pm_runtime_use_autosuspend(&bdev->pdev->dev);
+ pm_runtime_set_active(&bdev->pdev->dev);
+ pm_runtime_enable(&bdev->pdev->dev);
}
unlock:
.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 */
+ .combine_modes = 1, /* Combine sleep and LPM flag */
.tristate_control = 0, /* Allow tri-state control of UART tx flag */
/* Irrelevant USB flags */
.usb_auto_sleep = 0,
if (hu->tty->dev->parent == dev->pdev->dev.parent) {
bcm->dev = dev;
hu->init_speed = dev->init_speed;
-#ifdef CONFIG_PM_SLEEP
+#ifdef CONFIG_PM
dev->hu = hu;
#endif
bcm_gpio_set_power(bcm->dev, true);
mutex_lock(&bcm_device_lock);
if (bcm_device_exists(bdev)) {
bcm_gpio_set_power(bdev, false);
-#ifdef CONFIG_PM_SLEEP
+#ifdef CONFIG_PM
+ pm_runtime_disable(&bdev->pdev->dev);
+ pm_runtime_set_suspended(&bdev->pdev->dev);
+
if (device_can_wakeup(&bdev->pdev->dev)) {
devm_free_irq(&bdev->pdev->dev, bdev->irq, bdev);
device_init_wakeup(&bdev->pdev->dev, false);
bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err);
bcm->rx_skb = NULL;
return err;
+ } else if (!bcm->rx_skb) {
+ /* Delay auto-suspend when receiving completed packet */
+ mutex_lock(&bcm_device_lock);
+ if (bcm->dev && bcm_device_exists(bcm->dev)) {
+ pm_runtime_get(&bcm->dev->pdev->dev);
+ pm_runtime_mark_last_busy(&bcm->dev->pdev->dev);
+ pm_runtime_put_autosuspend(&bcm->dev->pdev->dev);
+ }
+ mutex_unlock(&bcm_device_lock);
}
return count;
static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
{
struct bcm_data *bcm = hu->priv;
+ struct sk_buff *skb = NULL;
+ struct bcm_device *bdev = NULL;
- return skb_dequeue(&bcm->txq);
+ mutex_lock(&bcm_device_lock);
+
+ if (bcm_device_exists(bcm->dev)) {
+ bdev = bcm->dev;
+ pm_runtime_get_sync(&bdev->pdev->dev);
+ /* Shall be resumed here */
+ }
+
+ skb = skb_dequeue(&bcm->txq);
+
+ if (bdev) {
+ pm_runtime_mark_last_busy(&bdev->pdev->dev);
+ pm_runtime_put_autosuspend(&bdev->pdev->dev);
+ }
+
+ mutex_unlock(&bcm_device_lock);
+
+ return skb;
}
-#ifdef CONFIG_PM_SLEEP
-/* Platform suspend callback */
-static int bcm_suspend(struct device *dev)
+#ifdef CONFIG_PM
+static int bcm_suspend_device(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);
+ bt_dev_dbg(bdev, "");
- mutex_lock(&bcm_device_lock);
-
- if (!bdev->hu)
- goto unlock;
-
- if (!bdev->is_suspended) {
+ if (!bdev->is_suspended && bdev->hu) {
hci_uart_set_flow_control(bdev->hu, true);
- /* Once this callback returns, driver suspends BT via GPIO */
+ /* Once this returns, driver suspends BT via GPIO */
bdev->is_suspended = true;
}
mdelay(15);
}
+ return 0;
+}
+
+static int bcm_resume_device(struct device *dev)
+{
+ struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev));
+
+ bt_dev_dbg(bdev, "");
+
+ if (bdev->device_wakeup) {
+ gpiod_set_value(bdev->device_wakeup, true);
+ bt_dev_dbg(bdev, "resume, delaying 15 ms");
+ mdelay(15);
+ }
+
+ /* When this executes, the device has woken up already */
+ if (bdev->is_suspended && bdev->hu) {
+ bdev->is_suspended = false;
+
+ hci_uart_set_flow_control(bdev->hu, false);
+ }
+
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_PM_SLEEP
+/* Platform suspend callback */
+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);
+
+ /* bcm_suspend can be called at any time as long as platform device is
+ * bound, so it should use bcm_device_lock to protect access to hci_uart
+ * and device_wake-up GPIO.
+ */
+ mutex_lock(&bcm_device_lock);
+
+ if (!bdev->hu)
+ goto unlock;
+
+ if (pm_runtime_active(dev))
+ bcm_suspend_device(dev);
+
if (device_may_wakeup(&bdev->pdev->dev)) {
error = enable_irq_wake(bdev->irq);
if (!error)
bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended);
+ /* bcm_resume can be called at any time as long as platform device is
+ * bound, so it should use bcm_device_lock to protect access to hci_uart
+ * and device_wake-up GPIO.
+ */
mutex_lock(&bcm_device_lock);
if (!bdev->hu)
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");
- mdelay(15);
- }
-
- /* When this callback executes, the device has woken up already */
- if (bdev->is_suspended) {
- bdev->is_suspended = false;
-
- hci_uart_set_flow_control(bdev->hu, false);
- }
+ bcm_resume_device(dev);
unlock:
mutex_unlock(&bcm_device_lock);
+ pm_runtime_disable(dev);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+
return 0;
}
#endif
};
#ifdef CONFIG_ACPI
+static u8 acpi_active_low = ACPI_ACTIVE_LOW;
+
+/* IRQ polarity of some chipsets are not defined correctly in ACPI table. */
+static const struct dmi_system_id bcm_wrong_irq_dmi_table[] = {
+ {
+ .ident = "Asus T100TA",
+ .matches = {
+ DMI_EXACT_MATCH(DMI_SYS_VENDOR,
+ "ASUSTeK COMPUTER INC."),
+ DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100TA"),
+ },
+ .driver_data = &acpi_active_low,
+ },
+ { }
+};
+
static int bcm_resource(struct acpi_resource *ares, void *data)
{
struct bcm_device *dev = data;
static int bcm_acpi_probe(struct bcm_device *dev)
{
struct platform_device *pdev = dev->pdev;
- const struct acpi_device_id *id;
- struct acpi_device *adev;
LIST_HEAD(resources);
+ const struct dmi_system_id *dmi_id;
int ret;
- id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev);
- if (!id)
- return -ENODEV;
-
/* Retrieve GPIO data */
dev->name = dev_name(&pdev->dev);
ret = acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
}
/* Retrieve UART ACPI info */
- adev = ACPI_COMPANION(&dev->pdev->dev);
- if (!adev)
- return 0;
+ ret = acpi_dev_get_resources(ACPI_COMPANION(&dev->pdev->dev),
+ &resources, bcm_resource, dev);
+ if (ret < 0)
+ return ret;
+ acpi_dev_free_resource_list(&resources);
- acpi_dev_get_resources(adev, &resources, bcm_resource, dev);
+ dmi_id = dmi_first_match(bcm_wrong_irq_dmi_table);
+ if (dmi_id) {
+ bt_dev_warn(dev, "%s: Overwriting IRQ polarity to active low",
+ dmi_id->ident);
+ dev->irq_polarity = *(u8 *)dmi_id->driver_data;
+ }
return 0;
}
static int bcm_probe(struct platform_device *pdev)
{
struct bcm_device *dev;
- struct acpi_device_id *pdata = pdev->dev.platform_data;
int ret;
dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
dev->pdev = pdev;
- if (ACPI_HANDLE(&pdev->dev)) {
- ret = bcm_acpi_probe(dev);
- if (ret)
- return ret;
- } else if (pdata) {
- dev->name = pdata->id;
- } else {
- return -ENODEV;
- }
+ ret = bcm_acpi_probe(dev);
+ if (ret)
+ return ret;
platform_set_drvdata(pdev, dev);
#endif
/* Platform suspend and resume callbacks */
-static SIMPLE_DEV_PM_OPS(bcm_pm_ops, bcm_suspend, bcm_resume);
+static const struct dev_pm_ops bcm_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume)
+ SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL)
+};
static struct platform_driver bcm_driver = {
.probe = bcm_probe,
projects / firefly-linux-kernel-4.4.55.git / blobdiff