rtw89: pci: add LTR setting for v1 chip

Add LTR handle to PCI deinit as well.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220325060055.58482-5-pkshih@realtek.com

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

@@ -2182,10 +2182,13 @@ static int rtw89_pci_mode_op(struct rtw89_dev *rtwdev)
 
 static int rtw89_pci_ops_deinit(struct rtw89_dev *rtwdev)
 {
+	const struct rtw89_pci_info *info = rtwdev->pci_info;
+
 	if (rtwdev->chip->chip_id == RTL8852A) {
 		/* ltr sw trigger */
 		rtw89_write32_set(rtwdev, R_AX_LTR_CTRL_0, B_AX_APP_LTR_IDLE);
 	}
+	info->ltr_set(rtwdev, false);
 	rtw89_pci_ctrl_dma_all(rtwdev, false);
 	rtw89_pci_clr_idx_all(rtwdev);
 
@@ -2260,10 +2263,13 @@ static int rtw89_pci_ops_mac_pre_init(struct rtw89_dev *rtwdev)
 	return 0;
 }
 
-static int rtw89_pci_ltr_set(struct rtw89_dev *rtwdev)
+int rtw89_pci_ltr_set(struct rtw89_dev *rtwdev, bool en)
 {
 	u32 val;
 
+	if (!en)
+		return 0;
+
 	val = rtw89_read32(rtwdev, R_AX_LTR_CTRL_0);
 	if (rtw89_pci_ltr_is_err_reg_val(val))
 		return -EINVAL;
@@ -2290,13 +2296,61 @@ static int rtw89_pci_ltr_set(struct rtw89_dev *rtwdev)
 
 	return 0;
 }
+EXPORT_SYMBOL(rtw89_pci_ltr_set);
+
+int rtw89_pci_ltr_set_v1(struct rtw89_dev *rtwdev, bool en)
+{
+	u32 dec_ctrl;
+	u32 val32;
+
+	val32 = rtw89_read32(rtwdev, R_AX_LTR_CTRL_0);
+	if (rtw89_pci_ltr_is_err_reg_val(val32))
+		return -EINVAL;
+	val32 = rtw89_read32(rtwdev, R_AX_LTR_CTRL_1);
+	if (rtw89_pci_ltr_is_err_reg_val(val32))
+		return -EINVAL;
+	dec_ctrl = rtw89_read32(rtwdev, R_AX_LTR_DEC_CTRL);
+	if (rtw89_pci_ltr_is_err_reg_val(dec_ctrl))
+		return -EINVAL;
+	val32 = rtw89_read32(rtwdev, R_AX_LTR_LATENCY_IDX3);
+	if (rtw89_pci_ltr_is_err_reg_val(val32))
+		return -EINVAL;
+	val32 = rtw89_read32(rtwdev, R_AX_LTR_LATENCY_IDX0);
+	if (rtw89_pci_ltr_is_err_reg_val(val32))
+		return -EINVAL;
+
+	if (!en) {
+		dec_ctrl &= ~(LTR_EN_BITS | B_AX_LTR_IDX_DRV_MASK | B_AX_LTR_HW_DEC_EN);
+		dec_ctrl |= FIELD_PREP(B_AX_LTR_IDX_DRV_MASK, PCIE_LTR_IDX_IDLE) |
+			    B_AX_LTR_REQ_DRV;
+	} else {
+		dec_ctrl |= B_AX_LTR_HW_DEC_EN;
+	}
+
+	dec_ctrl &= ~B_AX_LTR_SPACE_IDX_V1_MASK;
+	dec_ctrl |= FIELD_PREP(B_AX_LTR_SPACE_IDX_V1_MASK, PCI_LTR_SPC_500US);
+
+	if (en)
+		rtw89_write32_set(rtwdev, R_AX_LTR_CTRL_0,
+				  B_AX_LTR_WD_NOEMP_CHK_V1 | B_AX_LTR_HW_EN);
+	rtw89_write32_mask(rtwdev, R_AX_LTR_CTRL_0, B_AX_LTR_IDLE_TIMER_IDX_MASK,
+			   PCI_LTR_IDLE_TIMER_3_2MS);
+	rtw89_write32_mask(rtwdev, R_AX_LTR_CTRL_1, B_AX_LTR_RX0_TH_MASK, 0x28);
+	rtw89_write32_mask(rtwdev, R_AX_LTR_CTRL_1, B_AX_LTR_RX1_TH_MASK, 0x28);
+	rtw89_write32(rtwdev, R_AX_LTR_DEC_CTRL, dec_ctrl);
+	rtw89_write32(rtwdev, R_AX_LTR_LATENCY_IDX3, 0x90039003);
+	rtw89_write32(rtwdev, R_AX_LTR_LATENCY_IDX0, 0x880b880b);
+
+	return 0;
+}
+EXPORT_SYMBOL(rtw89_pci_ltr_set_v1);
 
 static int rtw89_pci_ops_mac_post_init(struct rtw89_dev *rtwdev)
 {
 	const struct rtw89_pci_info *info = rtwdev->pci_info;
 	int ret;
 
-	ret = rtw89_pci_ltr_set(rtwdev);
+	ret = info->ltr_set(rtwdev, true);
 	if (ret) {
 		rtw89_err(rtwdev, "pci ltr set fail\n");
 		return ret;

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

@@ -647,6 +647,7 @@ struct rtw89_pci_info {
 
 	const struct rtw89_pci_ch_dma_addr_set *dma_addr_set;
 
+	int (*ltr_set)(struct rtw89_dev *rtwdev, bool en);
 	u32 (*fill_txaddr_info)(struct rtw89_dev *rtwdev,
 				void *txaddr_info_addr, u32 total_len,
 				dma_addr_t dma, u8 *add_info_nr);
@@ -912,6 +913,8 @@ struct pci_device_id;
 
 int rtw89_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id);
 void rtw89_pci_remove(struct pci_dev *pdev);
+int rtw89_pci_ltr_set(struct rtw89_dev *rtwdev, bool en);
+int rtw89_pci_ltr_set_v1(struct rtw89_dev *rtwdev, bool en);
 u32 rtw89_pci_fill_txaddr_info(struct rtw89_dev *rtwdev,
 			       void *txaddr_info_addr, u32 total_len,
 			       dma_addr_t dma, u8 *add_info_nr);

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

@@ -299,6 +299,27 @@
 #define B_AX_RPQ_BUSY BIT(1)
 #define B_AX_RXQ_BUSY BIT(0)
 
+#define R_AX_LTR_DEC_CTRL 0x1600
+#define B_AX_LTR_IDX_DRV_VLD BIT(16)
+#define B_AX_LTR_CURR_IDX_DRV_MASK GENMASK(15, 14)
+#define B_AX_LTR_IDX_FW_VLD BIT(13)
+#define B_AX_LTR_CURR_IDX_FW_MASK GENMASK(12, 11)
+#define B_AX_LTR_IDX_HW_VLD BIT(10)
+#define B_AX_LTR_CURR_IDX_HW_MASK GENMASK(9, 8)
+#define B_AX_LTR_REQ_DRV BIT(7)
+#define B_AX_LTR_IDX_DRV_MASK GENMASK(6, 5)
+#define PCIE_LTR_IDX_IDLE 3
+#define B_AX_LTR_DRV_DEC_EN BIT(4)
+#define B_AX_LTR_FW_DEC_EN BIT(3)
+#define B_AX_LTR_HW_DEC_EN BIT(2)
+#define B_AX_LTR_SPACE_IDX_V1_MASK GENMASK(1, 0)
+#define LTR_EN_BITS (B_AX_LTR_HW_DEC_EN | B_AX_LTR_FW_DEC_EN | B_AX_LTR_DRV_DEC_EN)
+
+#define R_AX_LTR_LATENCY_IDX0 0x1604
+#define R_AX_LTR_LATENCY_IDX1 0x1608
+#define R_AX_LTR_LATENCY_IDX2 0x160C
+#define R_AX_LTR_LATENCY_IDX3 0x1610
+
 #define R_AX_HCI_FC_CTRL_V1 0x1700
 #define R_AX_CH_PAGE_CTRL_V1 0x1704
 
@@ -440,6 +461,7 @@
 #define B_AX_APP_LTR_ACT BIT(5)
 #define B_AX_APP_LTR_IDLE BIT(4)
 #define B_AX_LTR_EN BIT(1)
+#define B_AX_LTR_WD_NOEMP_CHK_V1 BIT(1)
 #define B_AX_LTR_HW_EN BIT(0)
 
 #define R_AX_LTR_CTRL_1 0x8414

drivers/net/wireless/realtek/rtw89/rtw8852ae.c

@@ -40,6 +40,7 @@ static const struct rtw89_pci_info rtw8852a_pci_info = {
 
 	.dma_addr_set		= &rtw89_pci_ch_dma_addr_set,
 
+	.ltr_set		= rtw89_pci_ltr_set,
 	.fill_txaddr_info	= rtw89_pci_fill_txaddr_info,
 };
 

drivers/net/wireless/realtek/rtw89/rtw8852ce.c

@@ -41,6 +41,7 @@ static const struct rtw89_pci_info rtw8852c_pci_info = {
 
 	.dma_addr_set		= &rtw89_pci_ch_dma_addr_set_v1,
 
+	.ltr_set		= rtw89_pci_ltr_set_v1,
 	.fill_txaddr_info	= rtw89_pci_fill_txaddr_info_v1,
 };