[PATCH RFC 2/4] Bluetooth: btqca: Add WCN3988 support

[Luca Weiss <luca.weiss@fairphone.com>]

Add support for the Bluetooth chip codenamed APACHE which is part of
WCN3988.

The firmware for this chip has a slightly different naming scheme
compared to most others. For ROM Version 0x0200 we need to use
apbtfw10.tlv + apnv10.bin and for ROM version 0x201 apbtfw11.tlv +
apnv11.bin

Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
---
 drivers/bluetooth/btqca.c   | 13 +++++++++++--
 drivers/bluetooth/btqca.h   | 12 ++++++++++--
 drivers/bluetooth/hci_qca.c | 12 ++++++++++++
 3 files changed, 33 insertions(+), 4 deletions(-)

diff --git a/drivers/bluetooth/btqca.c b/drivers/bluetooth/btqca.c
index fd0941fe8608..3ee1ef88a640 100644
--- a/drivers/bluetooth/btqca.c
+++ b/drivers/bluetooth/btqca.c
@@ -594,14 +594,20 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
 	/* Firmware files to download are based on ROM version.
 	 * ROM version is derived from last two bytes of soc_ver.
 	 */
-	rom_ver = ((soc_ver & 0x00000f00) >> 0x04) | (soc_ver & 0x0000000f);
+	if (soc_type == QCA_WCN3988)
+		rom_ver = ((soc_ver & 0x00000f00) >> 0x05) | (soc_ver & 0x0000000f);
+	else
+		rom_ver = ((soc_ver & 0x00000f00) >> 0x04) | (soc_ver & 0x0000000f);
 
 	if (soc_type == QCA_WCN6750)
 		qca_send_patch_config_cmd(hdev);
 
 	/* Download rampatch file */
 	config.type = TLV_TYPE_PATCH;
-	if (qca_is_wcn399x(soc_type)) {
+	if (soc_type == QCA_WCN3988) {
+		snprintf(config.fwname, sizeof(config.fwname),
+			 "qca/apbtfw%02x.tlv", rom_ver);
+	} else if (qca_is_wcn399x(soc_type)) {
 		snprintf(config.fwname, sizeof(config.fwname),
 			 "qca/crbtfw%02x.tlv", rom_ver);
 	} else if (soc_type == QCA_QCA6390) {
@@ -636,6 +642,9 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
 	if (firmware_name)
 		snprintf(config.fwname, sizeof(config.fwname),
 			 "qca/%s", firmware_name);
+	else if (soc_type == QCA_WCN3988)
+		snprintf(config.fwname, sizeof(config.fwname),
+			 "qca/apnv%02x.bin", rom_ver);
 	else if (qca_is_wcn399x(soc_type)) {
 		if (ver.soc_id == QCA_WCN3991_SOC_ID) {
 			snprintf(config.fwname, sizeof(config.fwname),
diff --git a/drivers/bluetooth/btqca.h b/drivers/bluetooth/btqca.h
index b884095bcd9d..fc6cf314eb0e 100644
--- a/drivers/bluetooth/btqca.h
+++ b/drivers/bluetooth/btqca.h
@@ -142,6 +142,7 @@ enum qca_btsoc_type {
 	QCA_INVALID = -1,
 	QCA_AR3002,
 	QCA_ROME,
+	QCA_WCN3988,
 	QCA_WCN3990,
 	QCA_WCN3998,
 	QCA_WCN3991,
@@ -162,8 +163,15 @@ int qca_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr);
 int qca_send_pre_shutdown_cmd(struct hci_dev *hdev);
 static inline bool qca_is_wcn399x(enum qca_btsoc_type soc_type)
 {
-	return soc_type == QCA_WCN3990 || soc_type == QCA_WCN3991 ||
-	       soc_type == QCA_WCN3998;
+	switch (soc_type) {
+	case QCA_WCN3988:
+	case QCA_WCN3990:
+	case QCA_WCN3991:
+	case QCA_WCN3998:
+		return true;
+	default:
+		return false;
+	}
 }
 static inline bool qca_is_wcn6750(enum qca_btsoc_type soc_type)
 {
diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index 1597797ff169..96b837410a6b 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -1835,6 +1835,17 @@ static const struct hci_uart_proto qca_proto = {
 	.dequeue	= qca_dequeue,
 };
 
+static const struct qca_device_data qca_soc_data_wcn3988 __maybe_unused = {
+	.soc_type = QCA_WCN3988,
+	.vregs = (struct qca_vreg []) {
+		{ "vddio", 15000  },
+		{ "vddxo", 80000  },
+		{ "vddrf", 300000 },
+		{ "vddch0", 450000 },
+	},
+	.num_vregs = 4,
+};
+
 static const struct qca_device_data qca_soc_data_wcn3990 __maybe_unused = {
 	.soc_type = QCA_WCN3990,
 	.vregs = (struct qca_vreg []) {
@@ -2359,6 +2370,7 @@ static const struct of_device_id qca_bluetooth_of_match[] = {
 	{ .compatible = "qcom,qca6174-bt" },
 	{ .compatible = "qcom,qca6390-bt", .data = &qca_soc_data_qca6390},
 	{ .compatible = "qcom,qca9377-bt" },
+	{ .compatible = "qcom,wcn3988-bt", .data = &qca_soc_data_wcn3988},
 	{ .compatible = "qcom,wcn3990-bt", .data = &qca_soc_data_wcn3990},
 	{ .compatible = "qcom,wcn3991-bt", .data = &qca_soc_data_wcn3991},
 	{ .compatible = "qcom,wcn3998-bt", .data = &qca_soc_data_wcn3998},

-- 
2.40.0