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From:   Rocky Liao <rjliao@codeaurora.org>
To:     marcel@holtmann.org, johan.hedberg@gmail.com
Cc:     mka@chromium.org, linux-kernel@vger.kernel.org,
        linux-bluetooth@vger.kernel.org, linux-arm-msm@vger.kernel.org,
        bgodavar@codeaurora.org, Rocky Liao <rjliao@codeaurora.org>
Subject: [PATCH v2 1/2] Bluetooth: hci_qca: Load customized NVM based on the device property
Date:   Thu,  4 Apr 2019 17:08:27 +0800
Message-Id: <1554368908-22017-1-git-send-email-rjliao@codeaurora.org>
In-Reply-To: <1554359858-21049-1-git-send-email-rjliao@codeaurora.org>
References: <1554359858-21049-1-git-send-email-rjliao@codeaurora.org>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

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

Signed-off-by: Rocky Liao <rjliao@codeaurora.org>
---
Changes in v2:
  * added the property to the document file
    Documentation/devicetree/bindings/net/qualcomm-bluetooth.txt
  * fixed coding style warnings
  * moved the nvm-postfix to the last entry of the qca_serdev
---
 drivers/bluetooth/btqca.c   | 14 ++++++++++----
 drivers/bluetooth/btqca.h   |  6 ++++--
 drivers/bluetooth/hci_qca.c | 19 ++++++++++++++++++-
 3 files changed, 32 insertions(+), 7 deletions(-)

diff --git a/drivers/bluetooth/btqca.c b/drivers/bluetooth/btqca.c
index 6122685..4e89286 100644
--- a/drivers/bluetooth/btqca.c
+++ b/drivers/bluetooth/btqca.c
@@ -332,7 +332,8 @@ 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 *nvm_postfix)
 {
 	struct rome_config config;
 	int err;
@@ -368,9 +369,14 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
 	if (soc_type == QCA_WCN3990)
 		snprintf(config.fwname, sizeof(config.fwname),
 			 "qca/crnv%02x.bin", rom_ver);
-	else
-		snprintf(config.fwname, sizeof(config.fwname),
-			 "qca/nvm_%08x.bin", soc_ver);
+	else {
+		if (nvm_postfix)
+			snprintf(config.fwname, sizeof(config.fwname),
+				 "qca/nvm_%08x_%s.bin", soc_ver, nvm_postfix);
+		else
+			snprintf(config.fwname, sizeof(config.fwname),
+				 "qca/nvm_%08x.bin", soc_ver);
+	}
 
 	err = qca_download_firmware(hdev, &config);
 	if (err < 0) {
diff --git a/drivers/bluetooth/btqca.h b/drivers/bluetooth/btqca.h
index 6fdc25d..0dd6cd0 100644
--- a/drivers/bluetooth/btqca.h
+++ b/drivers/bluetooth/btqca.h
@@ -139,7 +139,8 @@ 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 *nvm_postfix);
 int qca_read_soc_version(struct hci_dev *hdev, u32 *soc_version);
 int qca_set_bdaddr(struct hci_dev *hdev, const bdaddr_t *bdaddr);
 #else
@@ -150,7 +151,8 @@ 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 *nvm_postfix)
 {
 	return -EOPNOTSUPP;
 }
diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index 4ea995d..560e880 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -168,6 +168,7 @@ struct qca_serdev {
 	struct qca_power *bt_power;
 	u32 init_speed;
 	u32 oper_speed;
+	const char *nvm_postfix;
 };
 
 static int qca_power_setup(struct hci_uart *hu, bool on);
@@ -189,6 +190,17 @@ static enum qca_btsoc_type qca_soc_type(struct hci_uart *hu)
 	return soc_type;
 }
 
+static const char *qca_get_nvm_postfix(struct hci_uart *hu)
+{
+	if (hu->serdev) {
+		struct qca_serdev *qsd = serdev_device_get_drvdata(hu->serdev);
+
+		return qsd->nvm_postfix;
+	} else {
+		return NULL;
+	}
+}
+
 static void __serial_clock_on(struct tty_struct *tty)
 {
 	/* TODO: Some chipset requires to enable UART clock on client
@@ -1191,6 +1203,7 @@ 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 *nvm_postfix = qca_get_nvm_postfix(hu);
 	int ret;
 	int soc_ver = 0;
 
@@ -1241,7 +1254,8 @@ 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,
+			nvm_postfix);
 	if (!ret) {
 		set_bit(STATE_IN_BAND_SLEEP_ENABLED, &qca->flags);
 		qca_debugfs_init(hdev);
@@ -1462,6 +1476,9 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 			return PTR_ERR(qcadev->bt_en);
 		}
 
+		device_property_read_string(&serdev->dev, "nvm-postfix",
+					 &qcadev->nvm_postfix);
+
 		qcadev->susclk = devm_clk_get(&serdev->dev, NULL);
 		if (IS_ERR(qcadev->susclk)) {
 			dev_err(&serdev->dev, "failed to acquire clk\n");
-- 
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