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Bluetooth: hci_vhci: Add force_prevent_wake entry

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This adds force_prevent_wake which can be used to force a certain state
while interacting with force_suspend.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Luiz Augusto von Dentz 2021-09-29 13:38:55 -07:00 committed by Marcel Holtmann
parent 59c218ca88
commit 60edfad4fd
1 changed files with 49 additions and 0 deletions
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49
drivers/bluetooth/hci_vhci.c
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@ -40,6 +40,7 @@ struct vhci_data {
struct delayed_work open_timeout;
bool suspended;
bool prevent_wake;
};
static int vhci_open_dev(struct hci_dev *hdev)
@ -94,6 +95,13 @@ static int vhci_get_codec_config_data(struct hci_dev *hdev, __u8 type,
return 0;
}
static bool vhci_prevent_wake(struct hci_dev *hdev)
{
struct vhci_data *data = hci_get_drvdata(hdev);
return data->prevent_wake;
}
static ssize_t force_suspend_read(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
@ -141,6 +149,43 @@ static const struct file_operations force_suspend_fops = {
.llseek = default_llseek,
};
static ssize_t force_prevent_wake_read(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct vhci_data *data = file->private_data;
char buf[3];
buf[0] = data->prevent_wake ? 'Y' : 'N';
buf[1] = '\n';
buf[2] = '\0';
return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
}
static ssize_t force_prevent_wake_write(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct vhci_data *data = file->private_data;
bool enable;
int err;
err = kstrtobool_from_user(user_buf, count, &enable);
if (err)
return err;
if (data->prevent_wake == enable)
return -EALREADY;
return count;
}
static const struct file_operations force_prevent_wake_fops = {
.open = simple_open,
.read = force_prevent_wake_read,
.write = force_prevent_wake_write,
.llseek = default_llseek,
};
static int __vhci_create_device(struct vhci_data *data, __u8 opcode)
{
struct hci_dev *hdev;
@ -182,6 +227,7 @@ static int __vhci_create_device(struct vhci_data *data, __u8 opcode)
hdev->send = vhci_send_frame;
hdev->get_data_path_id = vhci_get_data_path_id;
hdev->get_codec_config_data = vhci_get_codec_config_data;
hdev->prevent_wake = vhci_prevent_wake;
/* bit 6 is for external configuration */
if (opcode & 0x40)
@ -202,6 +248,9 @@ static int __vhci_create_device(struct vhci_data *data, __u8 opcode)
debugfs_create_file("force_suspend", 0644, hdev->debugfs, data,
&force_suspend_fops);
debugfs_create_file("force_prevent_wake", 0644, hdev->debugfs, data,
&force_prevent_wake_fops);
hci_skb_pkt_type(skb) = HCI_VENDOR_PKT;
skb_put_u8(skb, 0xff);