linux-kernel - [PATCH v4] Bluetooth: btqca: sequential validation

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Date:   Wed, 22 Dec 2021 17:30:44 +0530
From:   Sai Teja Aluvala <quic_saluvala@...cinc.com>
To:     marcel@...tmann.org, johan.hedberg@...il.com
Cc:     mka@...omium.org, linux-kernel@...r.kernel.org,
        linux-bluetooth@...r.kernel.org, quic_hemantg@...cinc.com,
        linux-arm-msm@...r.kernel.org, quic_bgodavar@...cinc.com,
        rjliao@...eaurora.org, hbandi@...eaurora.org,
        abhishekpandit@...omium.org, mcchou@...omium.org,
        quic_pharish@...cinc.com,
        Sai Teja Aluvala <quic_saluvala@...cinc.com>
Subject: [PATCH v4] Bluetooth: btqca: sequential validation

This change will have sequential validation support
& patch config command is added

Signed-off-by: Sai Teja Aluvala <quic_saluvala@...cinc.com>

v4:
* addressed the change from u8 cmd to const u8 cmd

v3:
* removed rlen,rtype
* Replaced kfree with kfree_skb

v2:
* Added static declaration
* Addressed wrong indentation
* Removed EDL_PATCH_CONFIG_CMD_LEN

v1:
*Initial patch
---
 drivers/bluetooth/btqca.c | 48 +++++++++++++++++++++++++++++++++++++++++++++++
 drivers/bluetooth/btqca.h |  2 ++
 2 files changed, 50 insertions(+)

diff --git a/drivers/bluetooth/btqca.c b/drivers/bluetooth/btqca.c
index be04d74..9091a88 100644
--- a/drivers/bluetooth/btqca.c
+++ b/drivers/bluetooth/btqca.c
@@ -141,6 +141,51 @@ static int qca_read_fw_build_info(struct hci_dev *hdev)
 	return err;
 }
 
+static int qca_send_patch_config_cmd(struct hci_dev *hdev)
+{
+	struct sk_buff *skb;
+	int err = 0;
+	const u8 cmd[] = {EDL_PATCH_CONFIG_CMD, 0x01, 0, 0, 0};
+	struct edl_event_hdr *edl;
+
+	bt_dev_dbg(hdev, "QCA Patch config");
+
+	skb = __hci_cmd_sync_ev(hdev, EDL_PATCH_CMD_OPCODE, sizeof(cmd),
+				cmd, HCI_EV_VENDOR, HCI_INIT_TIMEOUT);
+	if (IS_ERR(skb)) {
+		err = PTR_ERR(skb);
+		bt_dev_err(hdev, "Sending QCA Patch config failed (%d)", err);
+		return err;
+	}
+
+	if (skb->len != 2) {
+		bt_dev_err(hdev, "QCA Patch config cmd size mismatch len %d", skb->len);
+		err = -EILSEQ;
+		goto out;
+	}
+
+	edl = (struct edl_event_hdr *)(skb->data);
+	if (!edl) {
+		bt_dev_err(hdev, "QCA Patch config with no header");
+		err = -EILSEQ;
+		goto out;
+	}
+
+	if (edl->cresp != EDL_PATCH_CONFIG_RES_EVT || edl->rtype != EDL_PATCH_CONFIG_CMD) {
+		bt_dev_err(hdev, "QCA Wrong packet received %d %d", edl->cresp,
+			   edl->rtype);
+		err = -EIO;
+		goto out;
+	}
+
+out:
+	kfree_skb(skb);
+	if (err)
+		bt_dev_err(hdev, "QCA Patch config cmd failed (%d)", err);
+
+	return err;
+}
+
 static int qca_send_reset(struct hci_dev *hdev)
 {
 	struct sk_buff *skb;
@@ -551,6 +596,9 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
 	 */
 	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)) {
diff --git a/drivers/bluetooth/btqca.h b/drivers/bluetooth/btqca.h
index 30afa77..61e9a50 100644
--- a/drivers/bluetooth/btqca.h
+++ b/drivers/bluetooth/btqca.h
@@ -13,6 +13,7 @@
 #define EDL_PATCH_TLV_REQ_CMD		(0x1E)
 #define EDL_GET_BUILD_INFO_CMD		(0x20)
 #define EDL_NVM_ACCESS_SET_REQ_CMD	(0x01)
+#define EDL_PATCH_CONFIG_CMD		(0x28)
 #define MAX_SIZE_PER_TLV_SEGMENT	(243)
 #define QCA_PRE_SHUTDOWN_CMD		(0xFC08)
 #define QCA_DISABLE_LOGGING		(0xFC17)
@@ -24,6 +25,7 @@
 #define EDL_CMD_EXE_STATUS_EVT		(0x00)
 #define EDL_SET_BAUDRATE_RSP_EVT	(0x92)
 #define EDL_NVM_ACCESS_CODE_EVT		(0x0B)
+#define EDL_PATCH_CONFIG_RES_EVT	(0x00)
 #define QCA_DISABLE_LOGGING_SUB_OP	(0x14)
 
 #define EDL_TAG_ID_HCI			(17)
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc.