Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 74 insertions, 0 deletions

diff --git a/drivers/staging/r8188eu/core/rtw_efuse.c b/drivers/staging/r8188eu/core/rtw_efuse.c
new file mode 100644
index 000000000..df9534dd2
--- /dev/null
+++ b/drivers/staging/r8188eu/core/rtw_efuse.c
@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2007 - 2011 Realtek Corporation. */
+
+#define _RTW_EFUSE_C_
+
+#include "../include/osdep_service.h"
+#include "../include/drv_types.h"
+#include "../include/rtw_efuse.h"
+#include "../include/rtl8188e_hal.h"
+
+/*  */
+/* 	Description: */
+/* 		Execute E-Fuse read byte operation. */
+/* 		Referred from SD1 Richard. */
+/*  */
+/* 	Assumption: */
+/* 		1. Boot from E-Fuse and successfully auto-load. */
+/* 		2. PASSIVE_LEVEL (USB interface) */
+/*  */
+/* 	Created by Roger, 2008.10.21. */
+/*  */
+void
+ReadEFuseByte(
+		struct adapter *Adapter,
+		u16 _offset,
+		u8 *pbuf)
+{
+	u32 value32;
+	u8 readbyte;
+	u16 retry;
+	int res;
+
+	/* Write Address */
+	rtw_write8(Adapter, EFUSE_CTRL + 1, (_offset & 0xff));
+	res = rtw_read8(Adapter, EFUSE_CTRL + 2, &readbyte);
+	if (res)
+		return;
+
+	rtw_write8(Adapter, EFUSE_CTRL + 2, ((_offset >> 8) & 0x03) | (readbyte & 0xfc));
+
+	/* Write bit 32 0 */
+	res = rtw_read8(Adapter, EFUSE_CTRL + 3, &readbyte);
+	if (res)
+		return;
+
+	rtw_write8(Adapter, EFUSE_CTRL + 3, (readbyte & 0x7f));
+
+	/* Check bit 32 read-ready */
+	res = rtw_read32(Adapter, EFUSE_CTRL, &value32);
+	if (res)
+		return;
+
+	for (retry = 0; retry < 10000; retry++) {
+		res = rtw_read32(Adapter, EFUSE_CTRL, &value32);
+		if (res)
+			continue;
+
+		if (((value32 >> 24) & 0xff) & 0x80)
+			break;
+	}
+
+	/*  20100205 Joseph: Add delay suggested by SD1 Victor. */
+	/*  This fix the problem that Efuse read error in high temperature condition. */
+	/*  Designer says that there shall be some delay after ready bit is set, or the */
+	/*  result will always stay on last data we read. */
+	udelay(50);
+	res = rtw_read32(Adapter, EFUSE_CTRL, &value32);
+	if (res)
+		return;
+
+	*pbuf = (u8)(value32 & 0xff);
+
+	/* FIXME: return an error to caller */
+}