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Subject[PATCH v5 3/4] HID: steam: command to check wireless connection
Date
The wireless adaptor does not tell if a device is already connected when
steam_probe() is run.
Use a command to request the connection status.

Signed-off-by: Rodrigo Rivas Costa <rodrigorivascosta@gmail.com>
---
drivers/hid/hid-steam.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)

diff --git a/drivers/hid/hid-steam.c b/drivers/hid/hid-steam.c
index 03eebc4c28ba..3d34716ae55f 100644
--- a/drivers/hid/hid-steam.c
+++ b/drivers/hid/hid-steam.c
@@ -118,6 +118,11 @@ static int steam_send_report(struct steam_device *steam,
return ret;
}

+static inline int steam_send_report_byte(struct steam_device *steam, u8 cmd)
+{
+ return steam_send_report(steam, &cmd, 1);
+}
+
static int steam_get_serial(struct steam_device *steam)
{
/*
@@ -139,6 +144,16 @@ static int steam_get_serial(struct steam_device *steam)
return 0;
}

+/*
+ * This command requests the wireless adaptor to post an event
+ * with the connection status. Useful if this driver is loaded when
+ * the controller is already connected.
+ */
+static inline int steam_request_conn_status(struct steam_device *steam)
+{
+ return steam_send_report_byte(steam, 0xb4);
+}
+
static int steam_input_open(struct input_dev *dev)
{
struct steam_device *steam = input_get_drvdata(dev);
@@ -360,6 +375,7 @@ static int steam_probe(struct hid_device *hdev,
goto hid_hw_open_fail;
}
hid_info(hdev, "Steam wireless receiver connected");
+ steam_request_conn_status(steam);
} else {
ret = steam_register(steam);
if (ret) {
--
2.16.2
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