On Sat, Jun 16, 2018 at 11:57:15AM +0530, Balakrishna Godavarthi wrote:
> Subject: Bluetooth: hci_qca: Defined wrapper functions for setting
> UART speeds
s/Defined/Define/
or
s/Defined/Add/
>
> In qca_setup, we set initial and operating speeds for Qualcomm
> Bluetooth SoC's. This block of code is common across different
> Qualcomm Bluetooth SoC's. Instead of duplicating the code, created
> a wrapper function to set the speeds. So that future coming SoC's
> can use these wrapper functions to set speeds.
>
> Signed-off-by: Balakrishna Godavarthi <bgodavar@xxxxxxxxxxxxxx>
> ---
>
> Changes in v7:
> * initial patch
> * created wrapper functions for init and operating speeds.
>
> ---
> drivers/bluetooth/hci_qca.c | 64 ++++++++++++++++++++++++++-----------
> 1 file changed, 45 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
> index fe62420ef838..3e09c6223baf 100644
> --- a/drivers/bluetooth/hci_qca.c
> +++ b/drivers/bluetooth/hci_qca.c
> @@ -923,21 +923,10 @@ static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)
> hci_uart_set_baudrate(hu, speed);
> }
>
> -static int qca_setup(struct hci_uart *hu)
> +static void qca_set_init_speed(struct hci_uart *hu)
> {
> - struct hci_dev *hdev = hu->hdev;
> - struct qca_data *qca = hu->priv;
> - unsigned int speed, qca_baudrate = QCA_BAUDRATE_115200;
> - int ret;
> - int soc_ver = 0;
> -
> - bt_dev_info(hdev, "ROME setup");
> -
> - /* Patch downloading has to be done without IBS mode */
> - clear_bit(STATE_IN_BAND_SLEEP_ENABLED, &qca->flags);
> + unsigned int speed = 0;
>
> - /* Setup initial baudrate */
> - speed = 0;
> if (hu->init_speed)
> speed = hu->init_speed;
> else if (hu->proto->init_speed)
> @@ -945,27 +934,64 @@ static int qca_setup(struct hci_uart *hu)
>
> if (speed)
> host_set_baudrate(hu, speed);
> +}
> +
> +static int qca_get_oper_speed(struct hci_uart *hu)
Return type should be unsigned int.
> +{
> + unsigned int speed = 0;
>
> - /* Setup user speed if needed */
> - speed = 0;
> if (hu->oper_speed)
> speed = hu->oper_speed;
> else if (hu->proto->oper_speed)
> speed = hu->proto->oper_speed;
>
> + return speed;
> +}
> +
> +static int qca_set_oper_speed(struct hci_uart *hu)
> +{
> + unsigned int speed = 0, qca_baudrate;
initialization is not needed.
> + int ret = 0;
> +
> + speed = qca_get_oper_speed(hu);
> if (speed) {
nit:
if (!speed)
return 0;
> qca_baudrate = qca_get_baudrate_value(speed);
> -
> - bt_dev_info(hdev, "Set UART speed to %d", speed);
> - ret = qca_set_baudrate(hdev, qca_baudrate);
> + bt_dev_info(hu->hdev, "Set UART speed to %d", speed);
> + ret = qca_set_baudrate(hu->hdev, qca_baudrate);
> if (ret) {
> - bt_dev_err(hdev, "Failed to change the baud rate (%d)",
> + bt_dev_err(hu->hdev, "Failed to change the baud rate (%d)",
> ret);
> return ret;
> }
> host_set_baudrate(hu, speed);
> }
>
> + return ret;
> +}
> +
> +static int qca_setup(struct hci_uart *hu)
> +{
> + struct hci_dev *hdev = hu->hdev;
> + struct qca_data *qca = hu->priv;
> + unsigned int speed, qca_baudrate = QCA_BAUDRATE_115200;
> + int ret;
> + int soc_ver = 0;
> +
> + bt_dev_info(hdev, "ROME setup");
> +
> + /* Patch downloading has to be done without IBS mode */
> + clear_bit(STATE_IN_BAND_SLEEP_ENABLED, &qca->flags);
> +
> + /* Setup initial baudrate */
> + qca_set_init_speed(hu);
> + /* Setup user speed if needed */
> + ret = qca_set_oper_speed(hu);
> + if (ret)
> + return ret;
> + speed = qca_get_oper_speed(hu);
> + if (speed)
> + qca_baudrate = qca_get_baudrate_value(speed);
nit: the sequence
qca_set_oper_speed()
qca_get_oper_speed()
is slightly awkward to read. This could be avoided if the speed was
passed as parameter, though I understand this isn't done for symmetry
with qca_set_init_speed(). An alternative could be:
static int qca_set_speed(struct hci_uart *hu, unsigned int speed, enum
qca_speed_type speed_type)
{
unsigned int qca_baudrate;
if (speed_type == QCA_OPER_SPEED) {
qca_baudrate = qca_get_baudrate_value(speed);
bt_dev_info(hu->hdev, "Set UART speed to %d", speed);
ret = qca_set_baudrate(hu->hdev, qca_baudrate);
if (ret) {
bt_dev_err(hu->hdev, "Failed to change the baud rate (%d)",
ret);
return ret;
}
}
host_set_baudrate(hu, speed);
/* If the order doesn't matter set the host baudrate first and
return if speed_type != QCA_OPER_SPEED */
return 0;
}
static int qca_setup(struct hci_uart *hu)
{
...
speed = qca_get_init_speed(hu);
if (speed)
qca_set_speed(hu, speed, QCA_INIT_SPEED);
speed = qca_get_oper_speed(hu);
if (speed) {
qca_set_speed(hu, speed, QCA_OPER_SPEED);
qca_baudrate = qca_get_baudrate_value(speed);
}
...
}
Just a suggestion, ok for me if you prefer to keep it as is.
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