On 03/03/2024 17:53, Canfeng Zhuang wrote:
> QRC Driver support functions:
> - Read data from serial device port.
> - Write data to serial device port.
> - Pin control reset robotic controller.
>
> Signed-off-by: Canfeng Zhuang <quic_czhuang@xxxxxxxxxxx>
> ---
> drivers/misc/Kconfig | 1 +
> drivers/misc/Makefile | 1 +
> drivers/misc/qrc/Kconfig | 16 ++
> drivers/misc/qrc/Makefile | 6 +
> drivers/misc/qrc/qrc_core.c | 336 ++++++++++++++++++++++++++++++++++++++++++
> drivers/misc/qrc/qrc_core.h | 143 ++++++++++++++++++
> drivers/misc/qrc/qrc_uart.c | 345 ++++++++++++++++++++++++++++++++++++++++++++
> 7 files changed, 848 insertions(+)
>
> diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
> index 4fb291f0bf7c..a43108af6fde 100644
> --- a/drivers/misc/Kconfig
> +++ b/drivers/misc/Kconfig
> @@ -591,4 +591,5 @@ source "drivers/misc/cardreader/Kconfig"
> source "drivers/misc/uacce/Kconfig"
> source "drivers/misc/pvpanic/Kconfig"
> source "drivers/misc/mchp_pci1xxxx/Kconfig"
> +source "drivers/misc/qrc/Kconfig"
> endmenu
> diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
> index ea6ea5bbbc9c..ab3b2c4d99fa 100644
> --- a/drivers/misc/Makefile
> +++ b/drivers/misc/Makefile
> @@ -68,3 +68,4 @@ obj-$(CONFIG_TMR_INJECT) += xilinx_tmr_inject.o
> obj-$(CONFIG_TPS6594_ESM) += tps6594-esm.o
> obj-$(CONFIG_TPS6594_PFSM) += tps6594-pfsm.o
> obj-$(CONFIG_NSM) += nsm.o
> +obj-$(CONFIG_QCOM_QRC) += qrc/
> diff --git a/drivers/misc/qrc/Kconfig b/drivers/misc/qrc/Kconfig
> new file mode 100644
> index 000000000000..994985d7c320
> --- /dev/null
> +++ b/drivers/misc/qrc/Kconfig
> @@ -0,0 +1,16 @@
> +# SPDX-License-Identifier: GPL-2.0-only
> +#
> +# QRC device driver configuration
> +#
> +
> +menu "QCOM QRC device driver"
> +
> +config QCOM_QRC
> + tristate "QCOM QRC device driver for Robotic SDK MCU"
> + help
> + This kernel configuration is used to enable robotic controller
> + device driver. Say M here if you want to enable robotic
> + controller device driver.
> + When in doubt, say N.
> +
> +endmenu
> diff --git a/drivers/misc/qrc/Makefile b/drivers/misc/qrc/Makefile
> new file mode 100644
> index 000000000000..da2cf81f3c59
> --- /dev/null
> +++ b/drivers/misc/qrc/Makefile
> @@ -0,0 +1,6 @@
> +# SPDX-License-Identifier: GPL-2.0-only
> +#
> +# Makefile for the QRC bus specific drivers.
QRC bus? Nothing anywhere suggested this is a bus.
Limited review because this really looks like some vendor code, not
cleaned for upstream submission.
> +
> +
> +obj-$(CONFIG_QCOM_QRC) += qrc_core.o qrc_uart.o
...
> +
> +static int qrcuart_config(struct qrc_dev *dev)
> +{
> + /*baudrate,wordlength ... config*/
> + return 0;
> +}
> +
> +static struct qrc_device_ops qrcuart_qrc_ops = {
What is this and why do you need it? Don't define your ops without need.
Just call functions directly.
> + .qrcops_open = qrcuart_open,
> + .qrcops_close = qrcuart_close,
> + .qrcops_init = qrcuart_init,
> + .qrcops_uninit = qrcuart_uninit,
> + .qrcops_xmit = qrcuart_xmit,
> + .qrcops_receive = qrcuart_receive,
> + .qrcops_config = qrcuart_config,
> + .qrcops_setup = qrcuart_setup,
> + .qrcops_data_status = qrcuart_data_status,
> + .qrcops_data_clean = qrcuart_data_clean,
> +};
> +
> +static int qrcuart_setup(struct qrc_dev *dev)
> +{
> + dev->qrc_ops = &qrcuart_qrc_ops;
> + return 0;
> +}
> +
> +static int qrc_uart_probe(struct serdev_device *serdev)
> +{
> + struct qrc_dev *qdev;
> + struct qrcuart *qrc;
> + int ret = 0;
> +
> + qrc = kmalloc(sizeof(*qrc), GFP_KERNEL);
> + if (!qrc)
> + return -ENOMEM;
> + qdev = kmalloc(sizeof(*qdev), GFP_KERNEL);
Just use devm*. What is this code? Ancient vendor, 20 year old stuff?
> + if (!qdev) {
> + kfree(qrc);
> + return -ENOMEM;
> + }
> + qdev->dev = &serdev->dev;
> + qrc_set_data(qdev, qrc);
> +
> + qrc->qrc_dev = qdev;
> + qrc->serdev = serdev;
> + spin_lock_init(&qrc->lock);
> + INIT_WORK(&qrc->tx_work, qrcuart_transmit);
> + qrcuart_setup(qdev);
> + ret = qrcuart_init(qdev);
> + if (ret) {
> + dev_err(qdev->dev, "qrcuart: Fail to init qrc structure\n");
> + kfree(qdev);
> + kfree(qrc);
> + return ret;
> + }
> + serdev_device_set_drvdata(serdev, qrc);
> + serdev_device_set_client_ops(serdev, &qrc_serdev_ops);
> +
> + ret = serdev_device_open(serdev);
> + if (ret) {
> + dev_err(qdev->dev, "qrcuart :Unable to open device\n");
Whitespace typos.
> + goto free;
> + }
> + serdev_device_close(serdev);
> + qrc->is_open = false;
> +
> + ret = qrc_register_device(qdev, &serdev->dev);
> +
> + if (ret) {
> + dev_err(qdev->dev, "qrcuart: Unable to register qrc device\n");
> + cancel_work_sync(&qrc->tx_work);
> + goto free;
> + }
> +
> + return 0;
> +
> +free:
free or uninint? Your error handling is messy.
> + qrcuart_uninit(qdev);
> + kfree(qdev);
> + kfree(qrc);
> + return ret;
> +}
> +
> +static void qrc_uart_remove(struct serdev_device *serdev)
> +{
> + struct qrcuart *qrc = serdev_device_get_drvdata(serdev);
> +
> + if (qrc->is_open)
> + serdev_device_close(serdev);
> +
> + qrcuart_uninit(qrc->qrc_dev);
> + cancel_work_sync(&qrc->tx_work);
> + qrc_unregister(qrc->qrc_dev);
> + kfree(qrc->qrc_dev);
> + kfree(qrc);
> + dev_info(&serdev->dev, "qrcuart drv removed\n");
Drop such simple function entry/exit messages. Not needed and not helpful.
> +}
> +
> +static const struct of_device_id qrc_uart_of_match[] = {
> + { .compatible = "qcom,qrc-uart", },
> + {}
> +};
> +
> +MODULE_DEVICE_TABLE(of, qrc_uart_of_match);
> +
> +static struct serdev_device_driver qrc_uart_driver = {
> + .probe = qrc_uart_probe,
> + .remove = qrc_uart_remove,
> + .driver = {
> + .name = QRCUART_DRV_NAME,
> + .of_match_table = of_match_ptr(qrc_uart_of_match),
Drop of_match_ptr. You have warnings here.
> + },
> +};
> +
> +module_serdev_device_driver(qrc_uart_driver);
> +
> +/**********************************************/
Drop
> +
> +MODULE_DESCRIPTION("Qualcomm Technologies, Inc. QRC Uart Driver");
> +MODULE_LICENSE("GPL");
>
Best regards,
Krzysztof
