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wifi: rtw88: usb: Init RX burst length according to USB speed

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This is needed in order to make USB RX aggregation work with RTL8811CU
(and presumably RTL8822BU and RTL8822CU also).

I don't know what BIT_DMA_BURST_CNT, BIT_DMA_MODE, and BIT_DROP_DATA_EN
are doing.

Tested with RTL8822CU, RTL8811CU, and RTL8723DU.

The RX speed is unchanged in my tests.

Tested-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/ac569c6f-7129-4341-b523-901fe10cabff@gmail.com
This commit is contained in:
Bitterblue Smith
2024-08-08 01:19:36 +03:00
committed by Ping-Ke Shih
parent e24f825a93
commit fbbd8cb347
2 changed files with 28 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/net/wireless/realtek/rtw88/reg.h
+6
View File
@@ -322,6 +322,12 @@
#define REG_RXDMA_DPR 0x028C
#define REG_RXDMA_MODE 0x0290
#define BIT_DMA_MODE BIT(1)
#define BIT_DMA_BURST_CNT GENMASK(3, 2)
#define BIT_DMA_BURST_SIZE GENMASK(5, 4)
#define BIT_DMA_BURST_SIZE_64 2
#define BIT_DMA_BURST_SIZE_512 1
#define BIT_DMA_BURST_SIZE_1024 0
#define REG_RXPKTNUM 0x02B0
#define REG_INT_MIG 0x0304
drivers/net/wireless/realtek/rtw88/usb.c
+22 -1
View File
@@ -720,9 +720,30 @@ static void rtw_usb_link_ps(struct rtw_dev *rtwdev, bool enter)
/* empty function for rtw_hci_ops */
}
static void rtw_usb_init_burst_pkt_len(struct rtw_dev *rtwdev)
{
struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
enum usb_device_speed speed = rtwusb->udev->speed;
u8 rxdma, burst_size;
rxdma = BIT_DMA_BURST_CNT | BIT_DMA_MODE;
if (speed == USB_SPEED_SUPER)
burst_size = BIT_DMA_BURST_SIZE_1024;
else if (speed == USB_SPEED_HIGH)
burst_size = BIT_DMA_BURST_SIZE_512;
else
burst_size = BIT_DMA_BURST_SIZE_64;
u8p_replace_bits(&rxdma, burst_size, BIT_DMA_BURST_SIZE);
rtw_write8(rtwdev, REG_RXDMA_MODE, rxdma);
rtw_write16_set(rtwdev, REG_TXDMA_OFFSET_CHK, BIT_DROP_DATA_EN);
}
static void rtw_usb_interface_cfg(struct rtw_dev *rtwdev)
{
/* empty function for rtw_hci_ops */
rtw_usb_init_burst_pkt_len(rtwdev);
}
static struct rtw_hci_ops rtw_usb_ops = {