wifi: rtw89: initialize DMA of CMAC

8852C needs this to change CMAC dma to full mode to keep receiving
packets after RX full event being resolved.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220916033811.13862-2-pkshih@realtek.com

drivers/net/wireless/realtek/rtw89/mac.c

@@ -2173,6 +2173,25 @@ static int ptcl_init(struct rtw89_dev *rtwdev, u8 mac_idx)
 	return 0;
 }
 
+static int cmac_dma_init(struct rtw89_dev *rtwdev, u8 mac_idx)
+{
+	enum rtw89_core_chip_id chip_id = rtwdev->chip->chip_id;
+	u32 reg;
+	int ret;
+
+	if (chip_id != RTL8852A && chip_id != RTL8852B)
+		return 0;
+
+	ret = rtw89_mac_check_mac_en(rtwdev, mac_idx, RTW89_CMAC_SEL);
+	if (ret)
+		return ret;
+
+	reg = rtw89_mac_reg_by_idx(R_AX_RXDMA_CTRL_0, mac_idx);
+	rtw89_write8_clr(rtwdev, reg, RX_FULL_MODE);
+
+	return 0;
+}
+
 static int cmac_init(struct rtw89_dev *rtwdev, u8 mac_idx)
 {
 	int ret;
@@ -2248,6 +2267,12 @@ static int cmac_init(struct rtw89_dev *rtwdev, u8 mac_idx)
 		return ret;
 	}
 
+	ret = cmac_dma_init(rtwdev, mac_idx);
+	if (ret) {
+		rtw89_err(rtwdev, "[ERR]CMAC%d DMA init %d\n", mac_idx, ret);
+		return ret;
+	}
+
 	return ret;
 }
 

drivers/net/wireless/realtek/rtw89/reg.h

@@ -2332,6 +2332,28 @@
 #define B_AX_DLE_IMR_SET (B_AX_RXSTS_FSM_HANG_ERROR_IMR | \
 			  B_AX_RXDATA_FSM_HANG_ERROR_IMR)
 
+#define R_AX_RXDMA_CTRL_0 0xC804
+#define R_AX_RXDMA_CTRL_0_C1 0xE804
+#define B_AX_RXDMA_DBGOUT_EN BIT(31)
+#define B_AX_RXDMA_DBG_SEL_MASK GENMASK(30, 29)
+#define B_AX_RXDMA_FIFO_DBG_SEL_MASK GENMASK(28, 25)
+#define B_AX_RXDMA_DEFAULT_PAGE_MASK GENMASK(22, 21)
+#define B_AX_RXDMA_BUFF_REQ_PRI_MASK GENMASK(20, 19)
+#define B_AX_RXDMA_TGT_QUEID_MASK GENMASK(18, 13)
+#define B_AX_RXDMA_TGT_PRID_MASK GENMASK(12, 10)
+#define B_AX_RXDMA_DIS_CSI_RELEASE BIT(9)
+#define B_AX_RXDMA_DIS_RXSTS_WAIT_PTR_CLR BIT(7)
+#define B_AX_RXDMA_DIS_CSI_WAIT_PTR_CLR BIT(6)
+#define B_AX_RXSTS_PTR_FULL_MODE BIT(5)
+#define B_AX_CSI_PTR_FULL_MODE BIT(4)
+#define B_AX_RU3_PTR_FULL_MODE BIT(3)
+#define B_AX_RU2_PTR_FULL_MODE BIT(2)
+#define B_AX_RU1_PTR_FULL_MODE BIT(1)
+#define B_AX_RU0_PTR_FULL_MODE BIT(0)
+#define RX_FULL_MODE (B_AX_RU0_PTR_FULL_MODE | B_AX_RU1_PTR_FULL_MODE | \
+		      B_AX_RU2_PTR_FULL_MODE | B_AX_RU3_PTR_FULL_MODE | \
+		      B_AX_CSI_PTR_FULL_MODE | B_AX_RXSTS_PTR_FULL_MODE)
+
 #define R_AX_RXDMA_PKT_INFO_0 0xC814
 #define R_AX_RXDMA_PKT_INFO_1 0xC818
 #define R_AX_RXDMA_PKT_INFO_2 0xC81C