[PATCH v4 11/11] wifi: rtw88: Add rtw8723du chipset support

Sascha Hauer
2022-11-29T10:08:53Z

Add support for the rtw8723du chipset based on
https://github.com/ulli-kroll/rtw88-usb.git

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---

Notes:
Changes since v3:
- drop unnecessary rtw8723du.h

Changes since v2:
- Re-add this patch, tested on hardware now

Changes since v1:
- Fix txdesc checksum calculation: Unlike other chips this one needs
a chksum = ~chksum at the end
- Fix efuse layout (struct rtw8723de_efuse and struct rtw8723du_efuse need
to be in a union as they are used alternatively)

drivers/net/wireless/realtek/rtw88/Kconfig | 11 ++++++
drivers/net/wireless/realtek/rtw88/Makefile | 3 ++
drivers/net/wireless/realtek/rtw88/rtw8723d.c | 28 +++++++++++++++
drivers/net/wireless/realtek/rtw88/rtw8723d.h | 13 ++++++-
.../net/wireless/realtek/rtw88/rtw8723du.c | 36 +++++++++++++++++++
5 files changed, 90 insertions(+), 1 deletion(-)
create mode 100644 drivers/net/wireless/realtek/rtw88/rtw8723du.c

diff --git a/drivers/net/wireless/realtek/rtw88/Kconfig b/drivers/net/wireless/realtek/rtw88/Kconfig
index 138289bc5ad0c..651ab56d9c6bd 100644
--- a/drivers/net/wireless/realtek/rtw88/Kconfig
+++ b/drivers/net/wireless/realtek/rtw88/Kconfig
@@ -86,6 +86,17 @@ config RTW88_8723DE

802.11n PCIe wireless network adapter

+config RTW88_8723DU
+ tristate "Realtek 8723DU USB wireless network adapter"
+ depends on USB
+ select RTW88_CORE
+ select RTW88_USB
+ select RTW88_8723D
+ help
+ Select this option will enable support for 8723DU chipset
+
+ 802.11n USB wireless network adapter
+
config RTW88_8821CE
tristate "Realtek 8821CE PCI wireless network adapter"
depends on PCI
diff --git a/drivers/net/wireless/realtek/rtw88/Makefile b/drivers/net/wireless/realtek/rtw88/Makefile
index fe2dd90204a78..fe7293ee87b45 100644
--- a/drivers/net/wireless/realtek/rtw88/Makefile
+++ b/drivers/net/wireless/realtek/rtw88/Makefile
@@ -44,6 +44,9 @@ rtw88_8723d-objs := rtw8723d.o rtw8723d_table.o
obj-$(CONFIG_RTW88_8723DE) += rtw88_8723de.o
rtw88_8723de-objs := rtw8723de.o

+obj-$(CONFIG_RTW88_8723DU) += rtw88_8723du.o
+rtw88_8723du-objs := rtw8723du.o
+
obj-$(CONFIG_RTW88_8821C) += rtw88_8821c.o
rtw88_8821c-objs := rtw8821c.o rtw8821c_table.o

diff --git a/drivers/net/wireless/realtek/rtw88/rtw8723d.c b/drivers/net/wireless/realtek/rtw88/rtw8723d.c
index 0a4f770fcbb7e..2d2f768bae2ea 100644
--- a/drivers/net/wireless/realtek/rtw88/rtw8723d.c
+++ b/drivers/net/wireless/realtek/rtw88/rtw8723d.c
@@ -210,6 +210,12 @@ static void rtw8723de_efuse_parsing(struct rtw_efuse *efuse,
ether_addr_copy(efuse->addr, map->e.mac_addr);
}

+static void rtw8723du_efuse_parsing(struct rtw_efuse *efuse,
+ struct rtw8723d_efuse *map)
+{
+ ether_addr_copy(efuse->addr, map->u.mac_addr);
+}
+
static int rtw8723d_read_efuse(struct rtw_dev *rtwdev, u8 *log_map)
{
struct rtw_efuse *efuse = &rtwdev->efuse;
@@ -239,6 +245,9 @@ static int rtw8723d_read_efuse(struct rtw_dev *rtwdev, u8 *log_map)
case RTW_HCI_TYPE_PCIE:
rtw8723de_efuse_parsing(efuse, map);
break;
+ case RTW_HCI_TYPE_USB:
+ rtw8723du_efuse_parsing(efuse, map);
+ break;
default:
/* unsupported now */
return -ENOTSUPP;
@@ -1945,6 +1954,24 @@ static void rtw8723d_pwr_track(struct rtw_dev *rtwdev)
dm_info->pwr_trk_triggered = false;
}

+static void rtw8723d_fill_txdesc_checksum(struct rtw_dev *rtwdev,
+ struct rtw_tx_pkt_info *pkt_info,
+ u8 *txdesc)
+{
+ size_t words = 32 / 2; /* calculate the first 32 bytes (16 words) */
+ __le16 chksum = 0;
+ __le16 *data = (__le16 *)(txdesc);
+
+ SET_TX_DESC_TXDESC_CHECKSUM(txdesc, 0x0000);
+
+ while (words--)
+ chksum ^= *data++;
+
+ chksum = ~chksum;
+
+ SET_TX_DESC_TXDESC_CHECKSUM(txdesc, __le16_to_cpu(chksum));
+}
+
static struct rtw_chip_ops rtw8723d_ops = {
.phy_set_param = rtw8723d_phy_set_param,
.read_efuse = rtw8723d_read_efuse,
@@ -1965,6 +1992,7 @@ static struct rtw_chip_ops rtw8723d_ops = {
.config_bfee = NULL,
.set_gid_table = NULL,
.cfg_csi_rate = NULL,
+ .fill_txdesc_checksum = rtw8723d_fill_txdesc_checksum,

.coex_set_init = rtw8723d_coex_cfg_init,
.coex_set_ant_switch = NULL,
diff --git a/drivers/net/wireless/realtek/rtw88/rtw8723d.h b/drivers/net/wireless/realtek/rtw88/rtw8723d.h
index 4641f6e047b41..a356318a5c15b 100644
--- a/drivers/net/wireless/realtek/rtw88/rtw8723d.h
+++ b/drivers/net/wireless/realtek/rtw88/rtw8723d.h
@@ -41,6 +41,14 @@ struct rtw8723de_efuse {
u8 sub_device_id[2];
};

+struct rtw8723du_efuse {
+ u8 res4[48]; /* 0xd0 */
+ u8 vender_id[2]; /* 0x100 */
+ u8 product_id[2]; /* 0x102 */
+ u8 usb_option; /* 0x104 */
+ u8 mac_addr[ETH_ALEN]; /* 0x107 */
+};
+
struct rtw8723d_efuse {
__le16 rtl_id;
u8 rsvd[2];
@@ -69,7 +77,10 @@ struct rtw8723d_efuse {
u8 rfe_option;
u8 country_code[2];
u8 res[3];
- struct rtw8723de_efuse e;
+ union {
+ struct rtw8723de_efuse e;
+ struct rtw8723du_efuse u;
+ };
};

extern const struct rtw_chip_info rtw8723d_hw_spec;
diff --git a/drivers/net/wireless/realtek/rtw88/rtw8723du.c b/drivers/net/wireless/realtek/rtw88/rtw8723du.c
new file mode 100644
index 0000000000000..4148151037c7c
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtw88/rtw8723du.c
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/* Copyright(c) 2018-2019 Realtek Corporation
+ */
+
+#include <linux/module.h>
+#include <linux/usb.h>
+#include "main.h"
+#include "rtw8723d.h"
+#include "usb.h"
+
+static const struct usb_device_id rtw_8723du_id_table[] = {
+ { USB_DEVICE_AND_INTERFACE_INFO(RTW_USB_VENDOR_ID_REALTEK,
+ 0xD723,
+ 0xff, 0xff, 0xff),
+ .driver_info = (kernel_ulong_t)&(rtw8723d_hw_spec) }, /* 8723DU 1*1 */
+ { },
+};
+MODULE_DEVICE_TABLE(usb, rtw_8723du_id_table);
+
+static int rtw8723du_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ return rtw_usb_probe(intf, id);
+}
+
+static struct usb_driver rtw_8723du_driver = {
+ .name = "rtw_8723du",
+ .id_table = rtw_8723du_id_table,
+ .probe = rtw8723du_probe,
+ .disconnect = rtw_usb_disconnect,
+};
+module_usb_driver(rtw_8723du_driver);
+
+MODULE_AUTHOR("Hans Ulli Kroll <linux@ulli-kroll.de>");
+MODULE_DESCRIPTION("Realtek 802.11n wireless 8723du driver");
+MODULE_LICENSE("Dual BSD/GPL");
--
2.30.2