[PATCH v3] Bluetooth: btusb: Add Qualcomm Bluetooth SoC WCN6855 support

[Rocky Liao]

This patch add support for WCN6855 i.e. patch and nvm download
support.

Signed-off-by: Rocky Liao <rjliao@xxxxxxxxxxxxxx>
---
 drivers/bluetooth/btusb.c | 66 +++++++++++++++++++++++++++++++--------
 1 file changed, 53 insertions(+), 13 deletions(-)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 9f294b941943..e888e4c02d69 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -59,6 +59,7 @@ static struct usb_driver btusb_driver;
 #define BTUSB_MEDIATEK		0x200000
 #define BTUSB_WIDEBAND_SPEECH	0x400000
 #define BTUSB_VALID_LE_STATES   0x800000
+#define BTUSB_QCA_WCN6855	0x1000000
 
 static const struct usb_device_id btusb_table[] = {
 	/* Generic Bluetooth USB device */
@@ -291,6 +292,10 @@ static const struct usb_device_id blacklist_table[] = {
 	{ USB_DEVICE(0x13d3, 0x3501), .driver_info = BTUSB_QCA_ROME |
 						     BTUSB_WIDEBAND_SPEECH },
 
+	/* QCA WCN6855 chipset */
+	{ USB_DEVICE(0x0cf3, 0xe600), .driver_info = BTUSB_QCA_WCN6855 |
+						     BTUSB_WIDEBAND_SPEECH },
+
 	/* Broadcom BCM2035 */
 	{ USB_DEVICE(0x0a5c, 0x2009), .driver_info = BTUSB_BCM92035 },
 	{ USB_DEVICE(0x0a5c, 0x200a), .driver_info = BTUSB_WRONG_SCO_MTU },
@@ -3409,6 +3414,27 @@ static int btusb_set_bdaddr_ath3012(struct hci_dev *hdev,
 	return 0;
 }
 
+static int btusb_set_bdaddr_wcn6855(struct hci_dev *hdev,
+				const bdaddr_t *bdaddr)
+{
+	struct sk_buff *skb;
+	u8 buf[6];
+	long ret;
+
+	memcpy(buf, bdaddr, sizeof(bdaddr_t));
+
+	skb = __hci_cmd_sync_ev(hdev, 0xfc14, sizeof(buf), buf,
+				HCI_EV_CMD_COMPLETE, HCI_INIT_TIMEOUT);
+	if (IS_ERR(skb)) {
+		ret = PTR_ERR(skb);
+		bt_dev_err(hdev, "Change address command failed (%ld)", ret);
+		return ret;
+	}
+	kfree_skb(skb);
+
+	return 0;
+}
+
 #define QCA_DFU_PACKET_LEN	4096
 
 #define QCA_GET_TARGET_VERSION	0x09
@@ -3428,7 +3454,8 @@ struct qca_version {
 } __packed;
 
 struct qca_rampatch_version {
-	__le16	rom_version;
+	__le16	rom_version_high;
+	__le16  rom_version_low;
 	__le16	patch_version;
 } __packed;
 
@@ -3440,12 +3467,14 @@ struct qca_device_info {
 };
 
 static const struct qca_device_info qca_devices_table[] = {
-	{ 0x00000100, 20, 4, 10 }, /* Rome 1.0 */
-	{ 0x00000101, 20, 4, 10 }, /* Rome 1.1 */
-	{ 0x00000200, 28, 4, 18 }, /* Rome 2.0 */
-	{ 0x00000201, 28, 4, 18 }, /* Rome 2.1 */
-	{ 0x00000300, 28, 4, 18 }, /* Rome 3.0 */
-	{ 0x00000302, 28, 4, 18 }, /* Rome 3.2 */
+	{ 0x00000100, 20, 4, 8 }, /* Rome 1.0 */
+	{ 0x00000101, 20, 4, 8 }, /* Rome 1.1 */
+	{ 0x00000200, 28, 4, 16 }, /* Rome 2.0 */
+	{ 0x00000201, 28, 4, 16 }, /* Rome 2.1 */
+	{ 0x00000300, 28, 4, 16 }, /* Rome 3.0 */
+	{ 0x00000302, 28, 4, 16 }, /* Rome 3.2 */
+	{ 0x00130100, 40, 4, 16 }, /* WCN6855 1.0 */
+	{ 0x00130200, 40, 4, 16 }  /* WCN6855 2.0 */
 };
 
 static int btusb_qca_send_vendor_req(struct usb_device *udev, u8 request,
@@ -3547,8 +3576,8 @@ static int btusb_setup_qca_load_rampatch(struct hci_dev *hdev,
 {
 	struct qca_rampatch_version *rver;
 	const struct firmware *fw;
-	u32 ver_rom, ver_patch;
-	u16 rver_rom, rver_patch;
+	u32 ver_rom, ver_patch, rver_rom;
+	u16 rver_rom_low, rver_rom_high, rver_patch;
 	char fwname[64];
 	int err;
 
@@ -3567,9 +3596,16 @@ static int btusb_setup_qca_load_rampatch(struct hci_dev *hdev,
 	bt_dev_info(hdev, "using rampatch file: %s", fwname);
 
 	rver = (struct qca_rampatch_version *)(fw->data + info->ver_offset);
-	rver_rom = le16_to_cpu(rver->rom_version);
+	rver_rom_low = le16_to_cpu(rver->rom_version_low);
 	rver_patch = le16_to_cpu(rver->patch_version);
 
+	if (ver_rom & ~0xffffU) {
+		rver_rom_high = le16_to_cpu(rver->rom_version_high);
+		rver_rom = le32_to_cpu(rver_rom_high << 16 | rver_rom_low);
+	} else {
+		rver_rom = rver_rom_low;
+	}
+
 	bt_dev_info(hdev, "QCA: patch rome 0x%x build 0x%x, "
 		    "firmware rome 0x%x build 0x%x",
 		    rver_rom, rver_patch, ver_rom, ver_patch);
@@ -3643,9 +3679,6 @@ static int btusb_setup_qca(struct hci_dev *hdev)
 		return err;
 
 	ver_rom = le32_to_cpu(ver.rom_version);
-	/* Don't care about high ROM versions */
-	if (ver_rom & ~0xffffU)
-		return 0;
 
 	for (i = 0; i < ARRAY_SIZE(qca_devices_table); i++) {
 		if (ver_rom == qca_devices_table[i].rom_version)
@@ -4081,6 +4114,13 @@ static int btusb_probe(struct usb_interface *intf,
 		btusb_check_needs_reset_resume(intf);
 	}
 
+	if (id->driver_info & BTUSB_QCA_WCN6855) {
+		data->setup_on_usb = btusb_setup_qca;
+		hdev->set_bdaddr = btusb_set_bdaddr_wcn6855;
+		hdev->cmd_timeout = btusb_qca_cmd_timeout;
+		set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
+	}
+
 	if (id->driver_info & BTUSB_AMP) {
 		/* AMP controllers do not support SCO packets */
 		data->isoc = NULL;
-- 
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