Bluetooth: hci_qca: Load customized NVM based on the device property

QCA BTSOC NVM is a customized firmware file and different vendors may
want to have different BTSOC configuration (e.g. Configure SCO over PCM
or I2S, Setting Tx power, etc.) via this file. This patch will allow
vendors to download different NVM firmware file by reading a device
property "firmware-name".

Signed-off-by: Rocky Liao <rjliao@codeaurora.org>
Tested-by: Harish Bandi <c-hbandi@codeaurora.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

3 files changed, 27 insertions, 5 deletions

diff --git a/drivers/bluetooth/btqca.c b/drivers/bluetooth/btqca.c
index 6ce5c8835efe..8b33128dccee 100644
--- a/drivers/bluetooth/btqca.c
+++ b/drivers/bluetooth/btqca.c
@@ -356,7 +356,8 @@ int qca_set_bdaddr_rome(struct hci_dev *hdev, const bdaddr_t *bdaddr)
 EXPORT_SYMBOL_GPL(qca_set_bdaddr_rome);
 
 int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
-                   enum qca_btsoc_type soc_type, u32 soc_ver)
+                   enum qca_btsoc_type soc_type, u32 soc_ver,
+                   const char *firmware_name)
 {
         struct rome_config config;
         int err;
@@ -389,7 +390,10 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
 
         /* Download NVM configuration */
         config.type = TLV_TYPE_NVM;
-        if (qca_is_wcn399x(soc_type))
+        if (firmware_name)
+                snprintf(config.fwname, sizeof(config.fwname),
+                         "qca/%s", firmware_name);
+        else if (qca_is_wcn399x(soc_type))
                 snprintf(config.fwname, sizeof(config.fwname),
                          "qca/crnv%02x.bin", rom_ver);
         else
diff --git a/drivers/bluetooth/btqca.h b/drivers/bluetooth/btqca.h
index 03fdec20730b..6a291a7a5d96 100644
--- a/drivers/bluetooth/btqca.h
+++ b/drivers/bluetooth/btqca.h
@@ -131,7 +131,8 @@ enum qca_btsoc_type {
 
 int qca_set_bdaddr_rome(struct hci_dev *hdev, const bdaddr_t *bdaddr);
 int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
-                   enum qca_btsoc_type soc_type, u32 soc_ver);
+                   enum qca_btsoc_type soc_type, u32 soc_ver,
+                   const char *firmware_name);
 int qca_read_soc_version(struct hci_dev *hdev, u32 *soc_version);
 int qca_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr);
 static inline bool qca_is_wcn399x(enum qca_btsoc_type soc_type)
@@ -146,7 +147,8 @@ static inline int qca_set_bdaddr_rome(struct hci_dev *hdev, const bdaddr_t *bdad
 }
 
 static inline int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
-                                 enum qca_btsoc_type soc_type, u32 soc_ver)
+                                 enum qca_btsoc_type soc_type, u32 soc_ver,
+                                 const char *firmware_name)
 {
         return -EOPNOTSUPP;
 }
diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index 9f992b905f24..9a5c9c1f9484 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -159,6 +159,7 @@ struct qca_serdev {
         struct qca_power *bt_power;
         u32 init_speed;
         u32 oper_speed;
+        const char *firmware_name;
 };
 
 static int qca_power_setup(struct hci_uart *hu, bool on);
@@ -180,6 +181,17 @@ static enum qca_btsoc_type qca_soc_type(struct hci_uart *hu)
         return soc_type;
 }
 
+static const char *qca_get_firmware_name(struct hci_uart *hu)
+{
+        if (hu->serdev) {
+                struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev);
+
+                return qsd->firmware_name;
+        } else {
+                return NULL;
+        }
+}
+
 static void __serial_clock_on(struct tty_struct *tty)
 {
         /* TODO: Some chipset requires to enable UART clock on client
@@ -1235,6 +1247,7 @@ static int qca_setup(struct hci_uart *hu)
         struct qca_data *qca = hu->priv;
         unsigned int speed, qca_baudrate = QCA_BAUDRATE_115200;
         enum qca_btsoc_type soc_type = qca_soc_type(hu);
+        const char *firmware_name = qca_get_firmware_name(hu);
         int ret;
         int soc_ver = 0;
 
@@ -1285,7 +1298,8 @@ static int qca_setup(struct hci_uart *hu)
 
         bt_dev_info(hdev, "QCA controller version 0x%08x", soc_ver);
         /* Setup patch / NVM configurations */
-        ret = qca_uart_setup(hdev, qca_baudrate, soc_type, soc_ver);
+        ret = qca_uart_setup(hdev, qca_baudrate, soc_type, soc_ver,
+                        firmware_name);
         if (!ret) {
                 set_bit(QCA_IBS_ENABLED, &qca->flags);
                 qca_debugfs_init(hdev);
@@ -1479,6 +1493,8 @@ static int qca_serdev_probe(struct serdev_device *serdev)
         qcadev->serdev_hu.serdev = serdev;
         data = of_device_get_match_data(&serdev->dev);
         serdev_device_set_drvdata(serdev, qcadev);
+        device_property_read_string(&serdev->dev, "firmware-name",
+                                         &qcadev->firmware_name);
         if (data && qca_is_wcn399x(data->soc_type)) {
                 qcadev->btsoc_type = data->soc_type;
                 qcadev->bt_power = devm_kzalloc(&serdev->dev,