1 files changed, 72 insertions, 0 deletions
diff --git a/drivers/net/wireless/realtek/rtw88/util.c b/drivers/net/wireless/realtek/rtw88/util.c
new file mode 100644
index 000000000000..212070c2baa8
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtw88/util.c
@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/* Copyright(c) 2018-2019  Realtek Corporation
+ */
+
+#include "main.h"
+#include "util.h"
+#include "reg.h"
+
+bool check_hw_ready(struct rtw_dev *rtwdev, u32 addr, u32 mask, u32 target)
+{
+	u32 cnt;
+
+	for (cnt = 0; cnt < 1000; cnt++) {
+		if (rtw_read32_mask(rtwdev, addr, mask) == target)
+			return true;
+
+		udelay(10);
+	}
+
+	return false;
+}
+
+bool ltecoex_read_reg(struct rtw_dev *rtwdev, u16 offset, u32 *val)
+{
+	if (!check_hw_ready(rtwdev, LTECOEX_ACCESS_CTRL, LTECOEX_READY, 1))
+		return false;
+
+	rtw_write32(rtwdev, LTECOEX_ACCESS_CTRL, 0x800F0000 | offset);
+	*val = rtw_read32(rtwdev, LTECOEX_READ_DATA);
+
+	return true;
+}
+
+bool ltecoex_reg_write(struct rtw_dev *rtwdev, u16 offset, u32 value)
+{
+	if (!check_hw_ready(rtwdev, LTECOEX_ACCESS_CTRL, LTECOEX_READY, 1))
+		return false;
+
+	rtw_write32(rtwdev, LTECOEX_WRITE_DATA, value);
+	rtw_write32(rtwdev, LTECOEX_ACCESS_CTRL, 0xC00F0000 | offset);
+
+	return true;
+}
+
+void rtw_restore_reg(struct rtw_dev *rtwdev,
+		     struct rtw_backup_info *bckp, u32 num)
+{
+	u8 len;
+	u32 reg;
+	u32 val;
+	int i;
+
+	for (i = 0; i < num; i++, bckp++) {
+		len = bckp->len;
+		reg = bckp->reg;
+		val = bckp->val;
+
+		switch (len) {
+		case 1:
+			rtw_write8(rtwdev, reg, (u8)val);
+			break;
+		case 2:
+			rtw_write16(rtwdev, reg, (u16)val);
+			break;
+		case 4:
+			rtw_write32(rtwdev, reg, (u32)val);
+			break;
+		default:
+			break;
+		}
+	}
+}