Bluetooth: btbcm: Add helper functions for UART setup

Firmware loading may reset the controller UART speed and needs to set
host UART speed back to init speed.

UART drivers setup is split in 3 parts:
- btbcm_initialize() resets the controller and returns the firmware
  name based on controller revision and sub_version.
- btbtcm_patchram() (already existing and public), which takes the
  firmware name as parameter, requests the firmware and loads it to
  the controller.
- btbcm_finalize() which resets the controller, reads local version
  and checks if the controller address is a default one or not.

Remove firmware name retrieval for UART controllers from
btbcm_setup_patchram().
Signed-off-by: Frederic Danis <frederic.danis@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

drivers/bluetooth/btbcm.c

@@ -246,6 +246,95 @@ static const struct {
 	{ }
 };
 
+int btbcm_initialize(struct hci_dev *hdev, char *fw_name, size_t len)
+{
+	u16 subver, rev;
+	const char *hw_name = NULL;
+	struct sk_buff *skb;
+	struct hci_rp_read_local_version *ver;
+	int i, err;
+
+	/* Reset */
+	err = btbcm_reset(hdev);
+	if (err)
+		return err;
+
+	/* Read Local Version Info */
+	skb = btbcm_read_local_version(hdev);
+	if (IS_ERR(skb))
+		return PTR_ERR(skb);
+
+	ver = (struct hci_rp_read_local_version *)skb->data;
+	rev = le16_to_cpu(ver->hci_rev);
+	subver = le16_to_cpu(ver->lmp_subver);
+	kfree_skb(skb);
+
+	/* Read Verbose Config Version Info */
+	skb = btbcm_read_verbose_config(hdev);
+	if (IS_ERR(skb))
+		return PTR_ERR(skb);
+
+	BT_INFO("%s: BCM: chip id %u", hdev->name, skb->data[1]);
+	kfree_skb(skb);
+
+	switch ((rev & 0xf000) >> 12) {
+	case 0:
+	case 3:
+		for (i = 0; bcm_uart_subver_table[i].name; i++) {
+			if (subver == bcm_uart_subver_table[i].subver) {
+				hw_name = bcm_uart_subver_table[i].name;
+				break;
+			}
+		}
+
+		snprintf(fw_name, len, "brcm/%s.hcd", hw_name ? : "BCM");
+		break;
+	default:
+		return 0;
+	}
+
+	BT_INFO("%s: %s (%3.3u.%3.3u.%3.3u) build %4.4u", hdev->name,
+		hw_name ? : "BCM", (subver & 0x7000) >> 13,
+		(subver & 0x1f00) >> 8, (subver & 0x00ff), rev & 0x0fff);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(btbcm_initialize);
+
+int btbcm_finalize(struct hci_dev *hdev)
+{
+	struct sk_buff *skb;
+	struct hci_rp_read_local_version *ver;
+	u16 subver, rev;
+	int err;
+
+	/* Reset */
+	err = btbcm_reset(hdev);
+	if (err)
+		return err;
+
+	/* Read Local Version Info */
+	skb = btbcm_read_local_version(hdev);
+	if (IS_ERR(skb))
+		return PTR_ERR(skb);
+
+	ver = (struct hci_rp_read_local_version *)skb->data;
+	rev = le16_to_cpu(ver->hci_rev);
+	subver = le16_to_cpu(ver->lmp_subver);
+	kfree_skb(skb);
+
+	BT_INFO("%s: BCM (%3.3u.%3.3u.%3.3u) build %4.4u", hdev->name,
+		(subver & 0x7000) >> 13, (subver & 0x1f00) >> 8,
+		(subver & 0x00ff), rev & 0x0fff);
+
+	btbcm_check_bdaddr(hdev);
+
+	set_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(btbcm_finalize);
+
 static const struct {
 	u16 subver;
 	const char *name;

drivers/bluetooth/btbcm.h

@@ -30,6 +30,9 @@ int btbcm_patchram(struct hci_dev *hdev, const struct firmware *fw);
 int btbcm_setup_patchram(struct hci_dev *hdev);
 int btbcm_setup_apple(struct hci_dev *hdev);
 
+int btbcm_initialize(struct hci_dev *hdev, char *fw_name, size_t len);
+int btbcm_finalize(struct hci_dev *hdev);
+
 #else
 
 static inline int btbcm_check_bdaddr(struct hci_dev *hdev)
@@ -57,4 +60,15 @@ static inline int btbcm_setup_apple(struct hci_dev *hdev)
 	return 0;
 }
 
+static inline int btbcm_initialize(struct hci_dev *hdev, char *fw_name,
+				   size_t len)
+{
+	return 0;
+}
+
+static inline int btbcm_finalize(struct hci_dev *hdev)
+{
+	return 0;
+}
+
 #endif