On Fri, Mar 10, 2023 at 09:29:22PM +0100, Martin Blumenstingl wrote:
> Wire up RTL8821CS chipset support using the new rtw88 SDIO HCI code as
> well as the existing RTL8821C chipset code.
>
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx>
> ---
> Changes since v1:
> - use /* ... */ style for copyright comments
>
>
> drivers/net/wireless/realtek/rtw88/Kconfig | 11 ++++++
> drivers/net/wireless/realtek/rtw88/Makefile | 3 ++
> .../net/wireless/realtek/rtw88/rtw8821cs.c | 35 +++++++++++++++++++
> 3 files changed, 49 insertions(+)
> create mode 100644 drivers/net/wireless/realtek/rtw88/rtw8821cs.c
>
> diff --git a/drivers/net/wireless/realtek/rtw88/Kconfig b/drivers/net/wireless/realtek/rtw88/Kconfig
> index 6b65da81127f..29eb2f8e0eb7 100644
> --- a/drivers/net/wireless/realtek/rtw88/Kconfig
> +++ b/drivers/net/wireless/realtek/rtw88/Kconfig
> @@ -133,6 +133,17 @@ config RTW88_8821CE
>
> 802.11ac PCIe wireless network adapter
>
> +config RTW88_8821CS
> + tristate "Realtek 8821CS SDIO wireless network adapter"
> + depends on MMC
> + select RTW88_CORE
> + select RTW88_SDIO
> + select RTW88_8821C
> + help
> + Select this option will enable support for 8821CS chipset
> +
> + 802.11ac SDIO wireless network adapter
> +
> config RTW88_8821CU
> tristate "Realtek 8821CU USB wireless network adapter"
> depends on USB
> diff --git a/drivers/net/wireless/realtek/rtw88/Makefile b/drivers/net/wireless/realtek/rtw88/Makefile
> index 6105c2745bda..82979b30ae8d 100644
> --- a/drivers/net/wireless/realtek/rtw88/Makefile
> +++ b/drivers/net/wireless/realtek/rtw88/Makefile
> @@ -59,6 +59,9 @@ rtw88_8821c-objs := rtw8821c.o rtw8821c_table.o
> obj-$(CONFIG_RTW88_8821CE) += rtw88_8821ce.o
> rtw88_8821ce-objs := rtw8821ce.o
>
> +obj-$(CONFIG_RTW88_8821CS) += rtw88_8821cs.o
> +rtw88_8821cs-objs := rtw8821cs.o
> +
> obj-$(CONFIG_RTW88_8821CU) += rtw88_8821cu.o
> rtw88_8821cu-objs := rtw8821cu.o
>
> diff --git a/drivers/net/wireless/realtek/rtw88/rtw8821cs.c b/drivers/net/wireless/realtek/rtw88/rtw8821cs.c
> new file mode 100644
> index 000000000000..7ad7c13ac9e6
> --- /dev/null
> +++ b/drivers/net/wireless/realtek/rtw88/rtw8821cs.c
> @@ -0,0 +1,35 @@
> +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
> +/* Copyright(c) Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx>
> + */
> +
> +#include <linux/mmc/sdio_func.h>
> +#include <linux/mmc/sdio_ids.h>
> +#include <linux/module.h>
> +#include "sdio.h"
> +#include "rtw8821c.h"
> +
> +static const struct sdio_device_id rtw_8821cs_id_table[] = {
> + {
> + SDIO_DEVICE(SDIO_VENDOR_ID_REALTEK,
> + SDIO_DEVICE_ID_REALTEK_RTW8821CS),
> + .driver_data = (kernel_ulong_t)&rtw8821c_hw_spec,
> + },
> + {}
> +};
> +MODULE_DEVICE_TABLE(sdio, rtw_8821cs_id_table);
> +
> +static struct sdio_driver rtw_8821cs_driver = {
> + .name = "rtw_8821cs",
> + .probe = rtw_sdio_probe,
> + .remove = rtw_sdio_remove,
> + .id_table = rtw_8821cs_id_table,
> + .drv = {
> + .pm = &rtw_sdio_pm_ops,
> + .shutdown = rtw_sdio_shutdown,
> + }
> +};
> +module_sdio_driver(rtw_8821cs_driver);
> +
> +MODULE_AUTHOR("Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx>");
> +MODULE_DESCRIPTION("Realtek 802.11ac wireless 8821cs driver");
> +MODULE_LICENSE("Dual BSD/GPL");
> --
> 2.39.2
>
Overall it works well for me, but when I resume from suspend I get the
following filling up my dmesg:
rtw_8821cs mmc3:0001:1: sdio read8 failed (0x86): -110
So suspend/resume seems to be an issue, but otherwise it works well
for me.
Chris Morgan
