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authorBalakrishna Godavarthi <bgodavar@codeaurora.org>2019-02-04 20:36:41 +0530
committerMarcel Holtmann <marcel@holtmann.org>2019-02-18 11:49:40 +0100
commitf9558270b85c865131586fad48d0ecf5b1ea597d (patch)
tree5e82afc2f2a1a3c3e77c26780dc5f26ac8f2f2ae /drivers/bluetooth
parent761f1e9f99b2cec66397db59a8f77ff6cbbfa536 (diff)
Bluetooth: hci_qca: use wait_until_sent() for power pulses
wcn3990 requires a power pulse to turn ON/OFF along with regulators. Sometimes we are observing the power pulses are sent out with some time delay, due to queuing these commands. This is causing synchronization issues with chip, which intern delay the chip setup or may end up with communication issues. Signed-off-by: Balakrishna Godavarthi <bgodavar@codeaurora.org> Reviewed-by: Matthias Kaehlcke <mka@chromium.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'drivers/bluetooth')
-rw-r--r--drivers/bluetooth/hci_qca.c38
1 files changed, 15 insertions, 23 deletions
diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index 53ac5ade532b..9a1c0a71b460 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -60,6 +60,7 @@
#define IBS_WAKE_RETRANS_TIMEOUT_MS 100
#define IBS_TX_IDLE_TIMEOUT_MS 2000
#define BAUDRATE_SETTLE_TIMEOUT_MS 300
+#define POWER_PULSE_TRANS_TIMEOUT_MS 100
/* susclk rate */
#define SUSCLK_RATE_32KHZ 32768
@@ -1013,11 +1014,10 @@ static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)
hci_uart_set_baudrate(hu, speed);
}
-static int qca_send_power_pulse(struct hci_dev *hdev, u8 cmd)
+static int qca_send_power_pulse(struct hci_uart *hu, u8 cmd)
{
- struct hci_uart *hu = hci_get_drvdata(hdev);
- struct qca_data *qca = hu->priv;
- struct sk_buff *skb;
+ int ret;
+ int timeout = msecs_to_jiffies(POWER_PULSE_TRANS_TIMEOUT_MS);
/* These power pulses are single byte command which are sent
* at required baudrate to wcn3990. On wcn3990, we have an external
@@ -1029,19 +1029,17 @@ static int qca_send_power_pulse(struct hci_dev *hdev, u8 cmd)
* save power. Disabling hardware flow control is mandatory while
* sending power pulses to SoC.
*/
- bt_dev_dbg(hdev, "sending power pulse %02x to SoC", cmd);
-
- skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
- if (!skb)
- return -ENOMEM;
+ bt_dev_dbg(hu->hdev, "sending power pulse %02x to controller", cmd);
+ serdev_device_write_flush(hu->serdev);
hci_uart_set_flow_control(hu, true);
+ ret = serdev_device_write_buf(hu->serdev, &cmd, sizeof(cmd));
+ if (ret < 0) {
+ bt_dev_err(hu->hdev, "failed to send power pulse %02x", cmd);
+ return ret;
+ }
- skb_put_u8(skb, cmd);
- hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
-
- skb_queue_tail(&qca->txq, skb);
- hci_uart_tx_wakeup(hu);
+ serdev_device_wait_until_sent(hu->serdev, timeout);
/* Wait for 100 uS for SoC to settle down */
usleep_range(100, 200);
@@ -1116,7 +1114,6 @@ static int qca_set_speed(struct hci_uart *hu, enum qca_speed_type speed_type)
static int qca_wcn3990_init(struct hci_uart *hu)
{
- struct hci_dev *hdev = hu->hdev;
struct qca_serdev *qcadev;
int ret;
@@ -1139,12 +1136,12 @@ static int qca_wcn3990_init(struct hci_uart *hu)
/* Forcefully enable wcn3990 to enter in to boot mode. */
host_set_baudrate(hu, 2400);
- ret = qca_send_power_pulse(hdev, QCA_WCN3990_POWEROFF_PULSE);
+ ret = qca_send_power_pulse(hu, QCA_WCN3990_POWEROFF_PULSE);
if (ret)
return ret;
qca_set_speed(hu, QCA_INIT_SPEED);
- ret = qca_send_power_pulse(hdev, QCA_WCN3990_POWERON_PULSE);
+ ret = qca_send_power_pulse(hu, QCA_WCN3990_POWERON_PULSE);
if (ret)
return ret;
@@ -1277,13 +1274,8 @@ static const struct qca_vreg_data qca_soc_data = {
static void qca_power_shutdown(struct hci_uart *hu)
{
- struct serdev_device *serdev = hu->serdev;
- unsigned char cmd = QCA_WCN3990_POWEROFF_PULSE;
-
host_set_baudrate(hu, 2400);
- hci_uart_set_flow_control(hu, true);
- serdev_device_write_buf(serdev, &cmd, sizeof(cmd));
- hci_uart_set_flow_control(hu, false);
+ qca_send_power_pulse(hu, QCA_WCN3990_POWEROFF_PULSE);
qca_power_setup(hu, false);
}