wifi: rtw89: pci: add pre_deinit to be called after probe complete

At probe stage, we only do partial initialization to enable ability to
download firmware and read capabilities. After that, we use this pre_deinit
to disable HCI to save power.

Signed-off-by: Ping-Ke Shih <[email protected]>
Signed-off-by: Kalle Valo <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: Ping-Ke Shih

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

@@ -4236,6 +4236,8 @@ static int rtw89_chip_efuse_info_setup(struct rtw89_dev *rtwdev)
 
 	rtw89_core_setup_phycap(rtwdev);
 
+	rtw89_hci_mac_pre_deinit(rtwdev);
+
 	rtw89_mac_pwr_off(rtwdev);
 
 	return 0;

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

@@ -3064,6 +3064,7 @@ struct rtw89_hci_ops {
 	void (*write32)(struct rtw89_dev *rtwdev, u32 addr, u32 data);
 
 	int (*mac_pre_init)(struct rtw89_dev *rtwdev);
+	int (*mac_pre_deinit)(struct rtw89_dev *rtwdev);
 	int (*mac_post_init)(struct rtw89_dev *rtwdev);
 	int (*deinit)(struct rtw89_dev *rtwdev);
 
@@ -4803,6 +4804,11 @@ static inline void rtw89_hci_tx_kick_off(struct rtw89_dev *rtwdev, u8 txch)
 	return rtwdev->hci.ops->tx_kick_off(rtwdev, txch);
 }
 
+static inline int rtw89_hci_mac_pre_deinit(struct rtw89_dev *rtwdev)
+{
+	return rtwdev->hci.ops->mac_pre_deinit(rtwdev);
+}
+
 static inline void rtw89_hci_flush_queues(struct rtw89_dev *rtwdev, u32 queues,
 					  bool drop)
 {

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

@@ -3837,6 +3837,7 @@ EXPORT_SYMBOL(rtw89_pm_ops);
 
 const struct rtw89_pci_gen_def rtw89_pci_gen_ax = {
 	.mac_pre_init = rtw89_pci_ops_mac_pre_init_ax,
+	.mac_pre_deinit = NULL,
 	.mac_post_init = rtw89_pci_ops_mac_post_init_ax,
 
 	.clr_idx_all = rtw89_pci_clr_idx_all_ax,
@@ -3866,6 +3867,7 @@ static const struct rtw89_hci_ops rtw89_pci_ops = {
 	.write32	= rtw89_pci_ops_write32,
 
 	.mac_pre_init	= rtw89_pci_ops_mac_pre_init,
+	.mac_pre_deinit	= rtw89_pci_ops_mac_pre_deinit,
 	.mac_post_init	= rtw89_pci_ops_mac_post_init,
 	.deinit		= rtw89_pci_ops_deinit,
 

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

@@ -1038,6 +1038,7 @@ struct rtw89_pci_bd_ram {
 
 struct rtw89_pci_gen_def {
 	int (*mac_pre_init)(struct rtw89_dev *rtwdev);
+	int (*mac_pre_deinit)(struct rtw89_dev *rtwdev);
 	int (*mac_post_init)(struct rtw89_dev *rtwdev);
 
 	void (*clr_idx_all)(struct rtw89_dev *rtwdev);
@@ -1464,6 +1465,17 @@ static inline int rtw89_pci_ops_mac_pre_init(struct rtw89_dev *rtwdev)
 	return gen_def->mac_pre_init(rtwdev);
 }
 
+static inline int rtw89_pci_ops_mac_pre_deinit(struct rtw89_dev *rtwdev)
+{
+	const struct rtw89_pci_info *info = rtwdev->pci_info;
+	const struct rtw89_pci_gen_def *gen_def = info->gen_def;
+
+	if (!gen_def->mac_pre_deinit)
+		return 0;
+
+	return gen_def->mac_pre_deinit(rtwdev);
+}
+
 static inline int rtw89_pci_ops_mac_post_init(struct rtw89_dev *rtwdev)
 {
 	const struct rtw89_pci_info *info = rtwdev->pci_info;

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

@@ -329,6 +329,23 @@ static int rtw89_pci_ops_mac_pre_init_be(struct rtw89_dev *rtwdev)
 	return 0;
 }
 
+static int rtw89_pci_ops_mac_pre_deinit_be(struct rtw89_dev *rtwdev)
+{
+	u32 val;
+
+	_patch_pcie_power_wake_be(rtwdev, false);
+
+	val = rtw89_read32_mask(rtwdev, R_BE_IC_PWR_STATE, B_BE_WLMAC_PWR_STE_MASK);
+	if (val == 0)
+		return 0;
+
+	rtw89_pci_ctrl_trxdma_pcie_be(rtwdev, MAC_AX_PCIE_DISABLE,
+				      MAC_AX_PCIE_DISABLE, MAC_AX_PCIE_DISABLE);
+	rtw89_pci_clr_idx_all_be(rtwdev);
+
+	return 0;
+}
+
 int rtw89_pci_ltr_set_v2(struct rtw89_dev *rtwdev, bool en)
 {
 	u32 ctrl0, cfg0, cfg1, dec_ctrl, idle_ltcy, act_ltcy, dis_ltcy;
@@ -474,6 +491,7 @@ static int rtw89_pci_lv1rst_start_dma_be(struct rtw89_dev *rtwdev)
 
 const struct rtw89_pci_gen_def rtw89_pci_gen_be = {
 	.mac_pre_init = rtw89_pci_ops_mac_pre_init_be,
+	.mac_pre_deinit = rtw89_pci_ops_mac_pre_deinit_be,
 	.mac_post_init = rtw89_pci_ops_mac_post_init_be,
 
 	.clr_idx_all = rtw89_pci_clr_idx_all_be,

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

@@ -3871,6 +3871,15 @@
 #define R_BE_UDM2 0x01F8
 #define B_BE_UDM2_EPC_RA_MASK GENMASK(31, 0)
 
+#define R_BE_IC_PWR_STATE 0x03F0
+#define B_BE_WHOLE_SYS_PWR_STE_MASK GENMASK(25, 16)
+#define MAC_AX_SYS_ACT 0x220
+#define B_BE_WLMAC_PWR_STE_MASK GENMASK(9, 8)
+#define B_BE_UART_HCISYS_PWR_STE_MASK GENMASK(7, 6)
+#define B_BE_SDIO_HCISYS_PWR_STE_MASK GENMASK(5, 4)
+#define B_BE_USB_HCISYS_PWR_STE_MASK GENMASK(3, 2)
+#define B_BE_PCIE_HCISYS_PWR_STE_MASK GENMASK(1, 0)
+
 #define R_BE_DCPU_PLATFORM_ENABLE 0x0888
 #define B_BE_DCPU_SYM_DPLT_MEM_MUX_EN BIT(10)
 #define B_BE_DCPU_WARM_EN BIT(9)