c06fb25d1f
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74 lines
2.4 KiB
Diff
74 lines
2.4 KiB
Diff
From fbbd8cb347e25b68d25c4f3871821afc495ee7a9 Mon Sep 17 00:00:00 2001
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From: Bitterblue Smith <rtl8821cerfe2@gmail.com>
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Date: Thu, 8 Aug 2024 01:19:36 +0300
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Subject: [PATCH] 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
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(and presumably RTL8822BU and RTL8822CU also).
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I don't know what BIT_DMA_BURST_CNT, BIT_DMA_MODE, and BIT_DROP_DATA_EN
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are doing.
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Tested with RTL8822CU, RTL8811CU, and RTL8723DU.
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The RX speed is unchanged in my tests.
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Tested-by: Sascha Hauer <s.hauer@pengutronix.de>
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Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
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Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
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Link: https://patch.msgid.link/ac569c6f-7129-4341-b523-901fe10cabff@gmail.com
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---
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drivers/net/wireless/realtek/rtw88/reg.h | 6 ++++++
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drivers/net/wireless/realtek/rtw88/usb.c | 23 ++++++++++++++++++++++-
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2 files changed, 28 insertions(+), 1 deletion(-)
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--- a/drivers/net/wireless/realtek/rtw88/reg.h
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+++ b/drivers/net/wireless/realtek/rtw88/reg.h
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@@ -322,6 +322,12 @@
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#define REG_RXDMA_DPR 0x028C
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#define REG_RXDMA_MODE 0x0290
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#define BIT_DMA_MODE BIT(1)
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+#define BIT_DMA_BURST_CNT GENMASK(3, 2)
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+#define BIT_DMA_BURST_SIZE GENMASK(5, 4)
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+#define BIT_DMA_BURST_SIZE_64 2
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+#define BIT_DMA_BURST_SIZE_512 1
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+#define BIT_DMA_BURST_SIZE_1024 0
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+
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#define REG_RXPKTNUM 0x02B0
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#define REG_INT_MIG 0x0304
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--- a/drivers/net/wireless/realtek/rtw88/usb.c
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+++ b/drivers/net/wireless/realtek/rtw88/usb.c
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@@ -720,9 +720,30 @@ static void rtw_usb_link_ps(struct rtw_d
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/* empty function for rtw_hci_ops */
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}
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+static void rtw_usb_init_burst_pkt_len(struct rtw_dev *rtwdev)
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+{
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+ struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
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+ enum usb_device_speed speed = rtwusb->udev->speed;
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+ u8 rxdma, burst_size;
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+
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+ rxdma = BIT_DMA_BURST_CNT | BIT_DMA_MODE;
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+
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+ if (speed == USB_SPEED_SUPER)
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+ burst_size = BIT_DMA_BURST_SIZE_1024;
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+ else if (speed == USB_SPEED_HIGH)
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+ burst_size = BIT_DMA_BURST_SIZE_512;
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+ else
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+ burst_size = BIT_DMA_BURST_SIZE_64;
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+
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+ u8p_replace_bits(&rxdma, burst_size, BIT_DMA_BURST_SIZE);
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+
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+ rtw_write8(rtwdev, REG_RXDMA_MODE, rxdma);
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+ rtw_write16_set(rtwdev, REG_TXDMA_OFFSET_CHK, BIT_DROP_DATA_EN);
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+}
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+
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static void rtw_usb_interface_cfg(struct rtw_dev *rtwdev)
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{
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- /* empty function for rtw_hci_ops */
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+ rtw_usb_init_burst_pkt_len(rtwdev);
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}
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static struct rtw_hci_ops rtw_usb_ops = {
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