UBUNTU: SAUCE: Bluetooth: Support for LED on Edge Gateways

BugLink: https://launchpad.net/bugs/1512999

For Edge Gateway 5000/5100 only.

Add code for controlling bluetooth LED via firmware, and turns
the LED on and off when the interface is up and down accordingly.
Signed-off-by: Wen-chien Jesse Sung <jesse.sung@canonical.com>
Acked-by: Brad Figg <brad.figg@canonical.com>
Acked-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>

drivers/bluetooth/btusb.c

@@ -24,6 +24,7 @@
 #include <linux/module.h>
 #include <linux/usb.h>
 #include <linux/firmware.h>
+#include <linux/dmi.h>
 #include <asm/unaligned.h>
 
 #include <net/bluetooth/bluetooth.h>
@@ -2775,6 +2776,33 @@ static int btusb_bcm_set_diag(struct hci_dev *hdev, bool enable)
 }
 #endif
 
+#define BTUSB_EDGE_LED_COMMAND		0xfc77
+static void btusb_edge_set_led(struct hci_dev *hdev, bool state)
+{
+	struct sk_buff *skb;
+	u8 config_led[] = { 0x09, 0x00, 0x01, 0x01 };
+
+	if (state)
+		config_led[1] = 0x01;
+
+	skb = __hci_cmd_sync(hdev, BTUSB_EDGE_LED_COMMAND, sizeof(config_led), config_led, HCI_INIT_TIMEOUT);
+	if (IS_ERR(skb))
+		BT_ERR("%s fail to set LED (%ld)", hdev->name, PTR_ERR(skb));
+	else
+		kfree_skb(skb);
+}
+
+static void btusb_edge_post_open(struct hci_dev *hdev)
+{
+	btusb_edge_set_led(hdev, true);
+}
+
+static int btusb_edge_shutdown(struct hci_dev *hdev)
+{
+	btusb_edge_set_led(hdev, false);
+	return 0;
+}
+
 static int btusb_probe(struct usb_interface *intf,
 		       const struct usb_device_id *id)
 {
@@ -2945,8 +2973,14 @@ static int btusb_probe(struct usb_interface *intf,
 		set_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks);
 	}
 
-	if (id->driver_info & BTUSB_MARVELL)
+	if (id->driver_info & BTUSB_MARVELL) {
 		hdev->set_bdaddr = btusb_set_bdaddr_marvell;
+		if (dmi_match(DMI_PRODUCT_NAME, "Edge Gateway 5000") ||
+			dmi_match(DMI_PRODUCT_NAME, "Edge Gateway 5100")) {
+			hdev->post_open = btusb_edge_post_open;
+			hdev->shutdown = btusb_edge_shutdown;
+		}
+	}
 
 	if (id->driver_info & BTUSB_SWAVE) {
 		set_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks);

include/net/bluetooth/hci_core.h

@@ -394,6 +394,7 @@ struct hci_dev {
 	int (*close)(struct hci_dev *hdev);
 	int (*flush)(struct hci_dev *hdev);
 	int (*setup)(struct hci_dev *hdev);
+	void (*post_open)(struct hci_dev *hdev);
 	int (*shutdown)(struct hci_dev *hdev);
 	int (*send)(struct hci_dev *hdev, struct sk_buff *skb);
 	void (*notify)(struct hci_dev *hdev, unsigned int evt);

net/bluetooth/hci_core.c

@@ -1532,6 +1532,8 @@ static int hci_dev_do_open(struct hci_dev *hdev)
 			mgmt_powered(hdev, 1);
 			hci_dev_unlock(hdev);
 		}
+		if (hdev->post_open)
+			hdev->post_open(hdev);
 	} else {
 		/* Init failed, cleanup */
 		flush_work(&hdev->tx_work);