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Message-Id: <1590546759-27387-1-git-send-email-zijuhu@codeaurora.org>
Date: Wed, 27 May 2020 10:32:39 +0800
From: Zijun Hu <zijuhu@...eaurora.org>
To: marcel@...tmann.org, johan.hedberg@...il.com
Cc: linux-kernel@...r.kernel.org, linux-bluetooth@...r.kernel.org,
linux-arm-msm@...r.kernel.org, bgodavar@...eaurora.org,
c-hbandi@...eaurora.org, hemantg@...eaurora.org, mka@...omium.org,
rjliao@...eaurora.org, zijuhu@...eaurora.org
Subject: [PATCH v3] bluetooth: hci_qca: Fix qca6390 enable failure after warm reboot
Warm reboot can not restore qca6390 controller baudrate
to default due to lack of controllable BT_EN pin or power
supply, so fails to download firmware after warm reboot.
Fixed by sending EDL_SOC_RESET VSC to reset controller
within added device shutdown implementation.
Signed-off-by: Zijun Hu <zijuhu@...eaurora.org>
---
drivers/bluetooth/hci_qca.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index e4a6823..4b6f8b6 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -1975,6 +1975,34 @@ static void qca_serdev_remove(struct serdev_device *serdev)
hci_uart_unregister_device(&qcadev->serdev_hu);
}
+static void qca_serdev_shutdown(struct device *dev)
+{
+ int ret;
+ int timeout = msecs_to_jiffies(CMD_TRANS_TIMEOUT_MS);
+ struct serdev_device *serdev = to_serdev_device(dev);
+ struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
+ const u8 ibs_wake_cmd[] = { 0xFD };
+ const u8 edl_reset_soc_cmd[] = { 0x01, 0x00, 0xFC, 0x01, 0x05 };
+
+ if (qcadev->btsoc_type == QCA_QCA6390) {
+ serdev_device_write_flush(serdev);
+ serdev_device_write_buf(serdev,
+ ibs_wake_cmd, sizeof(ibs_wake_cmd));
+ serdev_device_wait_until_sent(serdev, timeout);
+ usleep_range(8000, 10000);
+
+ serdev_device_write_flush(serdev);
+ ret = serdev_device_write_buf(serdev,
+ edl_reset_soc_cmd, sizeof(edl_reset_soc_cmd));
+ if (ret < 0) {
+ BT_ERR("QCA send EDL_RESET_REQ error: %d", ret);
+ return;
+ }
+ serdev_device_wait_until_sent(serdev, timeout);
+ usleep_range(8000, 10000);
+ }
+}
+
static int __maybe_unused qca_suspend(struct device *dev)
{
struct hci_dev *hdev = container_of(dev, struct hci_dev, dev);
@@ -2100,6 +2128,7 @@ static struct serdev_device_driver qca_serdev_driver = {
.name = "hci_uart_qca",
.of_match_table = of_match_ptr(qca_bluetooth_of_match),
.acpi_match_table = ACPI_PTR(qca_bluetooth_acpi_match),
+ .shutdown = qca_serdev_shutdown,
.pm = &qca_pm_ops,
},
};
--
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