Re: [PATCH v5 2/4] Bluetooth: hci_qca: Add support for QTI Bluetooth chip wcn6855

Johan Hovold
2023-03-09T17:12:02Z

On Wed, Feb 08, 2023 at 08:09:14PM -0600, Steev Klimaszewski wrote:
> Added regulators,GPIOs and changes required to power on/off wcn6855.
> Added support for firmware download for wcn6855.
>
> Signed-off-by: Steev Klimaszewski <steev@kali.org>
> ---
> Changes since v4:
> * Remove unused firmware check because we don't have mbn firmware.
> * Set qcadev->init_speed if it hasn't been set.
>
> Changes since v3:
> * drop unused regulators
>
> Changes since v2:
> * drop unnecessary commit info
>
> Changes since v1:
> * None
>
> drivers/bluetooth/btqca.c | 9 ++++++-
> drivers/bluetooth/btqca.h | 10 ++++++++
> drivers/bluetooth/hci_qca.c | 50 ++++++++++++++++++++++++++++---------
> 3 files changed, 56 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/bluetooth/btqca.c b/drivers/bluetooth/btqca.c
> index c9064d34d830..2f9d8bd27c38 100644
> --- a/drivers/bluetooth/btqca.c
> +++ b/drivers/bluetooth/btqca.c
> @@ -614,6 +614,9 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
> config.type = ELF_TYPE_PATCH;
> snprintf(config.fwname, sizeof(config.fwname),
> "qca/msbtfw%02x.mbn", rom_ver);
> + } else if (soc_type == QCA_WCN6855) {
> + snprintf(config.fwname, sizeof(config.fwname),
> + "qca/hpbtfw%02x.tlv", rom_ver);
> } else {
> snprintf(config.fwname, sizeof(config.fwname),
> "qca/rampatch_%08x.bin", soc_ver);
> @@ -648,6 +651,9 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
> else if (soc_type == QCA_WCN6750)
> snprintf(config.fwname, sizeof(config.fwname),
> "qca/msnv%02x.bin", rom_ver);
> + else if (soc_type == QCA_WCN6855)
> + snprintf(config.fwname, sizeof(config.fwname),
> + "qca/hpnv%02x.bin", rom_ver);
> else
> snprintf(config.fwname, sizeof(config.fwname),
> "qca/nvm_%08x.bin", soc_ver);
> @@ -672,6 +678,7 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
> case QCA_WCN3991:
> case QCA_WCN3998:
> case QCA_WCN6750:
> + case QCA_WCN6855:

Did you actually verify the microsoft extensions need this, or you are
assuming it works as 6750?

> hci_set_msft_opcode(hdev, 0xFD70);
> break;
> default:
> @@ -685,7 +692,7 @@ int qca_uart_setup(struct hci_dev *hdev, uint8_t baudrate,
> return err;
> }
>
> - if (soc_type == QCA_WCN3991 || soc_type == QCA_WCN6750) {
> + if (soc_type == QCA_WCN3991 || soc_type == QCA_WCN6750 || soc_type == QCA_WCN6855) {

Line is now over 80 columns which is still the preferred limit.

Perhaps this should now be a switch statement instead?

> /* get fw build info */
> err = qca_read_fw_build_info(hdev);
> if (err < 0)
> diff --git a/drivers/bluetooth/btqca.h b/drivers/bluetooth/btqca.h
> index 61e9a50e66ae..b884095bcd9d 100644
> --- a/drivers/bluetooth/btqca.h
> +++ b/drivers/bluetooth/btqca.h
> @@ -147,6 +147,7 @@ enum qca_btsoc_type {
> QCA_WCN3991,
> QCA_QCA6390,
> QCA_WCN6750,
> + QCA_WCN6855,
> };
>
> #if IS_ENABLED(CONFIG_BT_QCA)
> @@ -168,6 +169,10 @@ static inline bool qca_is_wcn6750(enum qca_btsoc_type soc_type)
> {
> return soc_type == QCA_WCN6750;
> }
> +static inline bool qca_is_wcn6855(enum qca_btsoc_type soc_type)
> +{
> + return soc_type == QCA_WCN6855;
> +}
>
> #else
>
> @@ -206,6 +211,11 @@ static inline bool qca_is_wcn6750(enum qca_btsoc_type soc_type)
> return false;
> }
>
> +static inline bool qca_is_wcn6855(enum qca_btsoc_type soc_type)
> +{
> + return false;
> +}
> +
> static inline int qca_send_pre_shutdown_cmd(struct hci_dev *hdev)
> {
> return -EOPNOTSUPP;
> diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
> index 3df8c3606e93..efc1c0306b4e 100644
> --- a/drivers/bluetooth/hci_qca.c
> +++ b/drivers/bluetooth/hci_qca.c
> @@ -605,8 +605,7 @@ static int qca_open(struct hci_uart *hu)
> if (hu->serdev) {
> qcadev = serdev_device_get_drvdata(hu->serdev);
>
> - if (qca_is_wcn399x(qcadev->btsoc_type) ||
> - qca_is_wcn6750(qcadev->btsoc_type))
> + if (!(qcadev->init_speed))
> hu->init_speed = qcadev->init_speed;

This change makes no sense.

In fact, it seems the driver never sets init_speed anywhere.

Either way, it should not be needed for wcn6855.

>
> if (qcadev->oper_speed)
> @@ -1317,7 +1316,8 @@ static int qca_set_baudrate(struct hci_dev *hdev, uint8_t baudrate)
>
> /* Give the controller time to process the request */
> if (qca_is_wcn399x(qca_soc_type(hu)) ||
> - qca_is_wcn6750(qca_soc_type(hu)))
> + qca_is_wcn6750(qca_soc_type(hu)) ||
> + qca_is_wcn6855(qca_soc_type(hu)))
> usleep_range(1000, 10000);
> else
> msleep(300);
> @@ -1394,7 +1394,8 @@ static unsigned int qca_get_speed(struct hci_uart *hu,
> static int qca_check_speeds(struct hci_uart *hu)
> {
> if (qca_is_wcn399x(qca_soc_type(hu)) ||
> - qca_is_wcn6750(qca_soc_type(hu))) {
> + qca_is_wcn6750(qca_soc_type(hu)) ||
> + qca_is_wcn6855(qca_soc_type(hu))) {
> if (!qca_get_speed(hu, QCA_INIT_SPEED) &&
> !qca_get_speed(hu, QCA_OPER_SPEED))
> return -EINVAL;
> @@ -1682,7 +1683,8 @@ static int qca_power_on(struct hci_dev *hdev)
> return 0;
>
> if (qca_is_wcn399x(soc_type) ||
> - qca_is_wcn6750(soc_type)) {
> + qca_is_wcn6750(soc_type) ||
> + qca_is_wcn6855(soc_type)) {
> ret = qca_regulator_init(hu);
> } else {
> qcadev = serdev_device_get_drvdata(hu->serdev);
> @@ -1723,7 +1725,8 @@ static int qca_setup(struct hci_uart *hu)
>
> bt_dev_info(hdev, "setting up %s",
> qca_is_wcn399x(soc_type) ? "wcn399x" :
> - (soc_type == QCA_WCN6750) ? "wcn6750" : "ROME/QCA6390");
> + (soc_type == QCA_WCN6750) ? "wcn6750" :
> + (soc_type == QCA_WCN6855) ? "wcn6855" : "ROME/QCA6390");

This is hideous, but not your fault...

>
> qca->memdump_state = QCA_MEMDUMP_IDLE;
>
> @@ -1735,7 +1738,8 @@ static int qca_setup(struct hci_uart *hu)
> clear_bit(QCA_SSR_TRIGGERED, &qca->flags);
>
> if (qca_is_wcn399x(soc_type) ||
> - qca_is_wcn6750(soc_type)) {
> + qca_is_wcn6750(soc_type) ||
> + qca_is_wcn6855(soc_type)) {
> set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);
> hci_set_aosp_capable(hdev);
>
> @@ -1757,7 +1761,8 @@ static int qca_setup(struct hci_uart *hu)
> }
>
> if (!(qca_is_wcn399x(soc_type) ||
> - qca_is_wcn6750(soc_type))) {
> + qca_is_wcn6750(soc_type) ||
> + qca_is_wcn6855(soc_type))) {

Perhaps you can add a leading space while changing this so that the
open-parenthesis alignment makes sense.

> /* Get QCA version information */
> ret = qca_read_soc_version(hdev, &ver, soc_type);
> if (ret)
> @@ -1883,6 +1888,20 @@ static const struct qca_device_data qca_soc_data_wcn6750 = {
> .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES,
> };
>
> +static const struct qca_device_data qca_soc_data_wcn6855 = {
> + .soc_type = QCA_WCN6855,
> + .vregs = (struct qca_vreg []) {
> + { "vddio", 5000 },
> + { "vddbtcxmx", 126000 },
> + { "vddrfacmn", 12500 },
> + { "vddrfa0p8", 102000 },
> + { "vddrfa1p7", 302000 },
> + { "vddrfa1p2", 257000 },

Hmm. More random regulator load values. I really think we should get rid
of this but that's a separate discussion.

> + },
> + .num_vregs = 6,
> + .capabilities = QCA_CAP_WIDEBAND_SPEECH | QCA_CAP_VALID_LE_STATES,
> +};
> +
> static void qca_power_shutdown(struct hci_uart *hu)
> {
> struct qca_serdev *qcadev;

As I mentioned elsewhere, you need to update also this function so that
wcn6855 can be powered down.

> @@ -2047,7 +2066,8 @@ static int qca_serdev_probe(struct serdev_device *serdev)
>
> if (data &&
> (qca_is_wcn399x(data->soc_type) ||
> - qca_is_wcn6750(data->soc_type))) {
> + qca_is_wcn6750(data->soc_type) ||
> + qca_is_wcn6855(data->soc_type))) {

Perhaps you fix the alignment here too.

> qcadev->btsoc_type = data->soc_type;
> qcadev->bt_power = devm_kzalloc(&serdev->dev,
> sizeof(struct qca_power),
> @@ -2067,14 +2087,18 @@ static int qca_serdev_probe(struct serdev_device *serdev)
>
> qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable",
> GPIOD_OUT_LOW);
> - if (IS_ERR_OR_NULL(qcadev->bt_en) && data->soc_type == QCA_WCN6750) {
> + if (IS_ERR_OR_NULL(qcadev->bt_en)
> + && (data->soc_type == QCA_WCN6750 ||

&& operator should go on the previous line before the line break.

> + data->soc_type == QCA_WCN6855)) {
> dev_err(&serdev->dev, "failed to acquire BT_EN gpio\n");
> power_ctrl_enabled = false;
> }
>
> qcadev->sw_ctrl = devm_gpiod_get_optional(&serdev->dev, "swctrl",
> GPIOD_IN);
> - if (IS_ERR_OR_NULL(qcadev->sw_ctrl) && data->soc_type == QCA_WCN6750)
> + if (IS_ERR_OR_NULL(qcadev->sw_ctrl)
> + && (data->soc_type == QCA_WCN6750 ||

Same here.

> + data->soc_type == QCA_WCN6855))
> dev_warn(&serdev->dev, "failed to acquire SW_CTRL gpio\n");
>
> qcadev->susclk = devm_clk_get_optional(&serdev->dev, NULL);
> @@ -2150,7 +2174,8 @@ static void qca_serdev_remove(struct serdev_device *serdev)
> struct qca_power *power = qcadev->bt_power;
>
> if ((qca_is_wcn399x(qcadev->btsoc_type) ||
> - qca_is_wcn6750(qcadev->btsoc_type)) &&
> + qca_is_wcn6750(qcadev->btsoc_type) ||
> + qca_is_wcn6855(qcadev->btsoc_type)) &&
> power->vregs_on)
> qca_power_shutdown(&qcadev->serdev_hu);
> else if (qcadev->susclk)
> @@ -2335,6 +2360,7 @@ static const struct of_device_id qca_bluetooth_of_match[] = {
> { .compatible = "qcom,wcn3991-bt", .data = &qca_soc_data_wcn3991},
> { .compatible = "qcom,wcn3998-bt", .data = &qca_soc_data_wcn3998},
> { .compatible = "qcom,wcn6750-bt", .data = &qca_soc_data_wcn6750},
> + { .compatible = "qcom,wcn6855-bt", .data = &qca_soc_data_wcn6855},
> { /* sentinel */ }
> };
> MODULE_DEVICE_TABLE(of, qca_bluetooth_of_match);

With power-off handling fixed, this seems to work as quite well on my
X13s with 6.3-rc1. Nice job!

Btw, apart from the frame reassembly error, I'm also seeing:

Bluetooth: Received HCI_IBS_WAKE_ACK in tx state 0

during probe.

Johan