diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/bluetooth/hci_intel.c | 72 |
1 files changed, 69 insertions, 3 deletions
diff --git a/drivers/bluetooth/hci_intel.c b/drivers/bluetooth/hci_intel.c index 3897e7506089..9fd1143bc78f 100644 --- a/drivers/bluetooth/hci_intel.c +++ b/drivers/bluetooth/hci_intel.c @@ -32,6 +32,7 @@ #include <linux/gpio/consumer.h> #include <linux/acpi.h> #include <linux/interrupt.h> +#include <linux/pm_runtime.h> #include <net/bluetooth/bluetooth.h> #include <net/bluetooth/hci_core.h> @@ -58,6 +59,8 @@ #define LPM_OP_SUSPEND_ACK 0x02 #define LPM_OP_RESUME_ACK 0x03 +#define LPM_SUSPEND_DELAY_MS 1000 + struct hci_lpm_pkt { __u8 opcode; __u8 dlen; @@ -79,6 +82,8 @@ static DEFINE_MUTEX(intel_device_list_lock); struct intel_data { struct sk_buff *rx_skb; struct sk_buff_head txq; + struct work_struct busy_work; + struct hci_uart *hu; unsigned long flags; }; @@ -284,6 +289,11 @@ static irqreturn_t intel_irq(int irq, void *dev_id) intel_lpm_host_wake(idev->hu); mutex_unlock(&idev->hu_lock); + /* Host/Controller are now LPM resumed, trigger a new delayed suspend */ + pm_runtime_get(&idev->pdev->dev); + pm_runtime_mark_last_busy(&idev->pdev->dev); + pm_runtime_put_autosuspend(&idev->pdev->dev); + return IRQ_HANDLED; } @@ -339,9 +349,17 @@ static int intel_set_power(struct hci_uart *hu, bool powered) } device_wakeup_enable(&idev->pdev->dev); + + pm_runtime_set_active(&idev->pdev->dev); + pm_runtime_use_autosuspend(&idev->pdev->dev); + pm_runtime_set_autosuspend_delay(&idev->pdev->dev, + LPM_SUSPEND_DELAY_MS); + pm_runtime_enable(&idev->pdev->dev); } else if (!powered && device_may_wakeup(&idev->pdev->dev)) { devm_free_irq(&idev->pdev->dev, idev->irq, idev); device_wakeup_disable(&idev->pdev->dev); + + pm_runtime_disable(&idev->pdev->dev); } } @@ -350,6 +368,28 @@ static int intel_set_power(struct hci_uart *hu, bool powered) return err; } +static void intel_busy_work(struct work_struct *work) +{ + struct list_head *p; + struct intel_data *intel = container_of(work, struct intel_data, + busy_work); + + /* Link is busy, delay the suspend */ + mutex_lock(&intel_device_list_lock); + list_for_each(p, &intel_device_list) { + struct intel_device *idev = list_entry(p, struct intel_device, + list); + + if (intel->hu->tty->dev->parent == idev->pdev->dev.parent) { + pm_runtime_get(&idev->pdev->dev); + pm_runtime_mark_last_busy(&idev->pdev->dev); + pm_runtime_put_autosuspend(&idev->pdev->dev); + break; + } + } + mutex_unlock(&intel_device_list_lock); +} + static int intel_open(struct hci_uart *hu) { struct intel_data *intel; @@ -361,6 +401,9 @@ static int intel_open(struct hci_uart *hu) return -ENOMEM; skb_queue_head_init(&intel->txq); + INIT_WORK(&intel->busy_work, intel_busy_work); + + intel->hu = hu; hu->priv = intel; @@ -376,6 +419,8 @@ static int intel_close(struct hci_uart *hu) BT_DBG("hu %p", hu); + cancel_work_sync(&intel->busy_work); + intel_set_power(hu, false); skb_queue_purge(&intel->txq); @@ -949,10 +994,12 @@ static void intel_recv_lpm_notify(struct hci_dev *hdev, int value) bt_dev_dbg(hdev, "TX idle notification (%d)", value); - if (value) + if (value) { set_bit(STATE_TX_ACTIVE, &intel->flags); - else + schedule_work(&intel->busy_work); + } else { clear_bit(STATE_TX_ACTIVE, &intel->flags); + } } static int intel_recv_lpm(struct hci_dev *hdev, struct sk_buff *skb) @@ -1027,9 +1074,27 @@ static int intel_recv(struct hci_uart *hu, const void *data, int count) static int intel_enqueue(struct hci_uart *hu, struct sk_buff *skb) { struct intel_data *intel = hu->priv; + struct list_head *p; BT_DBG("hu %p skb %p", hu, skb); + /* Be sure our controller is resumed and potential LPM transaction + * completed before enqueuing any packet. + */ + mutex_lock(&intel_device_list_lock); + list_for_each(p, &intel_device_list) { + struct intel_device *idev = list_entry(p, struct intel_device, + list); + + if (hu->tty->dev->parent == idev->pdev->dev.parent) { + pm_runtime_get_sync(&idev->pdev->dev); + pm_runtime_mark_last_busy(&idev->pdev->dev); + pm_runtime_put_autosuspend(&idev->pdev->dev); + break; + } + } + mutex_unlock(&intel_device_list_lock); + skb_queue_tail(&intel->txq, skb); return 0; @@ -1103,7 +1168,7 @@ static int intel_acpi_probe(struct intel_device *idev) } #endif -#ifdef CONFIG_PM_SLEEP +#ifdef CONFIG_PM static int intel_suspend(struct device *dev) { struct intel_device *idev = dev_get_drvdata(dev); @@ -1135,6 +1200,7 @@ static int intel_resume(struct device *dev) static const struct dev_pm_ops intel_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(intel_suspend, intel_resume) + SET_RUNTIME_PM_OPS(intel_suspend, intel_resume, NULL) }; static int intel_probe(struct platform_device *pdev) |
