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Subject[PATCH 5.2 37/94] Bluetooth: hci_qca: Send VS pre shutdown command.
Date
[ Upstream commit a2780889e247561744dd8efbd3478a1999b72ae3 ]

WCN399x chips are coex chips, it needs a VS pre shutdown
command while turning off the BT. So that chip can inform
BT is OFF to other active clients.

Signed-off-by: Harish Bandi <c-hbandi@codeaurora.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/bluetooth/btqca.c | 21 +++++++++++++++++++++
drivers/bluetooth/btqca.h | 7 +++++++
drivers/bluetooth/hci_qca.c | 3 +++
3 files changed, 31 insertions(+)

diff --git a/drivers/bluetooth/btqca.c b/drivers/bluetooth/btqca.c
index 0ee5acb685a10..ee25e6ae1a098 100644
--- a/drivers/bluetooth/btqca.c
+++ b/drivers/bluetooth/btqca.c
@@ -99,6 +99,27 @@ static int qca_send_reset(struct hci_dev *hdev)
return 0;
}

+int qca_send_pre_shutdown_cmd(struct hci_dev *hdev)
+{
+ struct sk_buff *skb;
+ int err;
+
+ bt_dev_dbg(hdev, "QCA pre shutdown cmd");
+
+ skb = __hci_cmd_sync(hdev, QCA_PRE_SHUTDOWN_CMD, 0,
+ NULL, HCI_INIT_TIMEOUT);
+ if (IS_ERR(skb)) {
+ err = PTR_ERR(skb);
+ bt_dev_err(hdev, "QCA preshutdown_cmd failed (%d)", err);
+ return err;
+ }
+
+ kfree_skb(skb);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(qca_send_pre_shutdown_cmd);
+
static void qca_tlv_check_data(struct rome_config *config,
const struct firmware *fw)
{
diff --git a/drivers/bluetooth/btqca.h b/drivers/bluetooth/btqca.h
index e9c9999596035..f2a9e576a86ce 100644
--- a/drivers/bluetooth/btqca.h
+++ b/drivers/bluetooth/btqca.h
@@ -13,6 +13,7 @@
#define EDL_PATCH_TLV_REQ_CMD (0x1E)
#define EDL_NVM_ACCESS_SET_REQ_CMD (0x01)
#define MAX_SIZE_PER_TLV_SEGMENT (243)
+#define QCA_PRE_SHUTDOWN_CMD (0xFC08)

#define EDL_CMD_REQ_RES_EVT (0x00)
#define EDL_PATCH_VER_RES_EVT (0x19)
@@ -130,6 +131,7 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
enum qca_btsoc_type soc_type, u32 soc_ver);
int qca_read_soc_version(struct hci_dev *hdev, u32 *soc_version);
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_WCN3998;
@@ -161,4 +163,9 @@ static inline bool qca_is_wcn399x(enum qca_btsoc_type soc_type)
{
return false;
}
+
+static inline int qca_send_pre_shutdown_cmd(struct hci_dev *hdev)
+{
+ return -EOPNOTSUPP;
+}
#endif
diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index f41fb2c02e4fd..d88b024eaf566 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -1319,6 +1319,9 @@ static int qca_power_off(struct hci_dev *hdev)
{
struct hci_uart *hu = hci_get_drvdata(hdev);

+ /* Perform pre shutdown command */
+ qca_send_pre_shutdown_cmd(hdev);
+
qca_power_shutdown(hu);
return 0;
}
--
2.20.1


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