rtw89: pci: add variant RPWM/CPWM to enter low power mode

RPWM/CPWM are registers that can set and check low power mode. Since chips
use different address, add a field to access them in common flow.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220421120903.73715-3-pkshih@realtek.com

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

@@ -1027,7 +1027,7 @@ static int rtw89_mac_check_cpwm_state(struct rtw89_dev *rtwdev,
 		return 0;
 
 	rpwm_req_num = rtwdev->mac.rpwm_seq_num;
-	cpwm_rsp_seq = rtw89_read16_mask(rtwdev, R_AX_CPWM,
+	cpwm_rsp_seq = rtw89_read16_mask(rtwdev, rtwdev->hci.cpwm_addr,
 					 PS_CPWM_RSP_SEQ_NUM);
 
 	if (rpwm_req_num != cpwm_rsp_seq)
@@ -1036,11 +1036,11 @@ static int rtw89_mac_check_cpwm_state(struct rtw89_dev *rtwdev,
 	rtwdev->mac.cpwm_seq_num = (rtwdev->mac.cpwm_seq_num + 1) &
 				    CPWM_SEQ_NUM_MAX;
 
-	cpwm_seq = rtw89_read16_mask(rtwdev, R_AX_CPWM, PS_CPWM_SEQ_NUM);
+	cpwm_seq = rtw89_read16_mask(rtwdev, rtwdev->hci.cpwm_addr, PS_CPWM_SEQ_NUM);
 	if (cpwm_seq != rtwdev->mac.cpwm_seq_num)
 		return -EPERM;
 
-	cpwm_status = rtw89_read16_mask(rtwdev, R_AX_CPWM, PS_CPWM_STATE);
+	cpwm_status = rtw89_read16_mask(rtwdev, rtwdev->hci.cpwm_addr, PS_CPWM_STATE);
 	if (cpwm_status != req_pwr_state)
 		return -EPERM;
 

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

@@ -3486,6 +3486,7 @@ int rtw89_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	struct ieee80211_hw *hw;
 	struct rtw89_dev *rtwdev;
 	const struct rtw89_driver_info *info;
+	const struct rtw89_pci_info *pci_info;
 	int driver_data_size;
 	int ret;
 
@@ -3496,20 +3497,21 @@ int rtw89_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		return -ENOMEM;
 	}
 
+	info = (const struct rtw89_driver_info *)id->driver_data;
+	pci_info = info->bus.pci;
+
 	rtwdev = hw->priv;
 	rtwdev->hw = hw;
 	rtwdev->dev = &pdev->dev;
+	rtwdev->chip = info->chip;
+	rtwdev->pci_info = info->bus.pci;
 	rtwdev->hci.ops = &rtw89_pci_ops;
 	rtwdev->hci.type = RTW89_HCI_TYPE_PCIE;
-	rtwdev->hci.rpwm_addr = R_AX_PCIE_HRPWM;
-	rtwdev->hci.cpwm_addr = R_AX_CPWM;
+	rtwdev->hci.rpwm_addr = pci_info->rpwm_addr;
+	rtwdev->hci.cpwm_addr = pci_info->cpwm_addr;
 
 	SET_IEEE80211_DEV(rtwdev->hw, &pdev->dev);
 
-	info = (const struct rtw89_driver_info *)id->driver_data;
-	rtwdev->chip = info->chip;
-	rtwdev->pci_info = info->bus.pci;
-
 	ret = rtw89_core_init(rtwdev);
 	if (ret) {
 		rtw89_err(rtwdev, "failed to initialise core\n");

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

@@ -481,6 +481,9 @@
 #define R_AX_PCIE_RX_PREF_ADV		0x13F4
 #define B_AX_RXDMA_PREF_ADV_EN		BIT(0)
 
+#define R_AX_PCIE_HRPWM_V1		0x30C0
+#define R_AX_PCIE_CRPWM			0x30C4
+
 #define RTW89_PCI_TXBD_NUM_MAX		256
 #define RTW89_PCI_RXBD_NUM_MAX		256
 #define RTW89_PCI_TXWD_NUM_MAX		512
@@ -698,6 +701,8 @@ struct rtw89_pci_info {
 	u32 dma_busy2_reg;
 	u32 dma_busy3_reg;
 
+	u32 rpwm_addr;
+	u32 cpwm_addr;
 	const struct rtw89_pci_ch_dma_addr_set *dma_addr_set;
 
 	int (*ltr_set)(struct rtw89_dev *rtwdev, bool en);

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

@@ -6,6 +6,7 @@
 #include <linux/pci.h>
 
 #include "pci.h"
+#include "reg.h"
 #include "rtw8852a.h"
 
 static const struct rtw89_pci_info rtw8852a_pci_info = {
@@ -38,6 +39,8 @@ static const struct rtw89_pci_info rtw8852a_pci_info = {
 	.dma_busy2_reg		= R_AX_PCIE_DMA_BUSY2,
 	.dma_busy3_reg		= R_AX_PCIE_DMA_BUSY1,
 
+	.rpwm_addr		= R_AX_PCIE_HRPWM,
+	.cpwm_addr		= R_AX_CPWM,
 	.dma_addr_set		= &rtw89_pci_ch_dma_addr_set,
 
 	.ltr_set		= rtw89_pci_ltr_set,

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

@@ -39,6 +39,8 @@ static const struct rtw89_pci_info rtw8852c_pci_info = {
 	.dma_busy2_reg		= R_AX_HAXI_DMA_BUSY2,
 	.dma_busy3_reg		= R_AX_HAXI_DMA_BUSY3,
 
+	.rpwm_addr		= R_AX_PCIE_HRPWM_V1,
+	.cpwm_addr		= R_AX_PCIE_CRPWM,
 	.dma_addr_set		= &rtw89_pci_ch_dma_addr_set_v1,
 
 	.ltr_set		= rtw89_pci_ltr_set_v1,