From 89d32c9071aacdd7f631c36ff9c7d3403229d568 Mon Sep 17 00:00:00 2001
From: Larry Finger <Larry.Finger@lwfinger.net>
Date: Thu, 19 Jan 2017 14:28:06 -0600
Subject: rtlwifi: Download firmware as bytes rather than as dwords

The firmware is read from disk as a little-endian byte string. The code
that loads the firmware into the device transfers it as 4-byte quantities.
The routines that write multi-byte quantities on BE hardware assume that
the data are in CPU order, and automatically do the conversion to the LE
order required by the device. As a result, the firmware is transmitted
incorrectly. Rather than do multiple byte swaps on the data, the download
routine is revised to transmit bytes rather than dwords. Although the
number of I/O operations is increased, the firmware is not often loaded.

All drivers have the same bug, and use essentially the same code to
download firmware. These routines have been moved into rtlwifi.

Some CamelCase variables have been renamed.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
---
 .../net/wireless/realtek/rtlwifi/rtl8192de/fw.c    | 70 +++-------------------
 1 file changed, 9 insertions(+), 61 deletions(-)

(limited to 'drivers/net/wireless/realtek/rtlwifi/rtl8192de')

diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192de/fw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8192de/fw.c
index 569d572e0618..88faeab2574f 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8192de/fw.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192de/fw.c
@@ -26,6 +26,7 @@
 #include "../wifi.h"
 #include "../pci.h"
 #include "../base.h"
+#include "../efuse.h"
 #include "reg.h"
 #include "def.h"
 #include "fw.h"
@@ -59,84 +60,31 @@ static void _rtl92d_enable_fw_download(struct ieee80211_hw *hw, bool enable)
 	}
 }
 
-static void _rtl92d_fw_block_write(struct ieee80211_hw *hw,
-				   const u8 *buffer, u32 size)
-{
-	struct rtl_priv *rtlpriv = rtl_priv(hw);
-	u32 blocksize = sizeof(u32);
-	u8 *bufferptr = (u8 *) buffer;
-	u32 *pu4BytePtr = (u32 *) buffer;
-	u32 i, offset, blockCount, remainSize;
-
-	blockCount = size / blocksize;
-	remainSize = size % blocksize;
-	for (i = 0; i < blockCount; i++) {
-		offset = i * blocksize;
-		rtl_write_dword(rtlpriv, (FW_8192D_START_ADDRESS + offset),
-				*(pu4BytePtr + i));
-	}
-	if (remainSize) {
-		offset = blockCount * blocksize;
-		bufferptr += offset;
-		for (i = 0; i < remainSize; i++) {
-			rtl_write_byte(rtlpriv, (FW_8192D_START_ADDRESS +
-						 offset + i), *(bufferptr + i));
-		}
-	}
-}
-
-static void _rtl92d_fw_page_write(struct ieee80211_hw *hw,
-				  u32 page, const u8 *buffer, u32 size)
-{
-	struct rtl_priv *rtlpriv = rtl_priv(hw);
-	u8 value8;
-	u8 u8page = (u8) (page & 0x07);
-
-	value8 = (rtl_read_byte(rtlpriv, REG_MCUFWDL + 2) & 0xF8) | u8page;
-	rtl_write_byte(rtlpriv, (REG_MCUFWDL + 2), value8);
-	_rtl92d_fw_block_write(hw, buffer, size);
-}
-
-static void _rtl92d_fill_dummy(u8 *pfwbuf, u32 *pfwlen)
-{
-	u32 fwlen = *pfwlen;
-	u8 remain = (u8) (fwlen % 4);
-
-	remain = (remain == 0) ? 0 : (4 - remain);
-	while (remain > 0) {
-		pfwbuf[fwlen] = 0;
-		fwlen++;
-		remain--;
-	}
-	*pfwlen = fwlen;
-}
-
 static void _rtl92d_write_fw(struct ieee80211_hw *hw,
 			     enum version_8192d version, u8 *buffer, u32 size)
 {
 	struct rtl_priv *rtlpriv = rtl_priv(hw);
 	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
-	u8 *bufferPtr = buffer;
-	u32 pagenums, remainSize;
+	u8 *bufferptr = buffer;
+	u32 pagenums, remainsize;
 	u32 page, offset;
 
 	RT_TRACE(rtlpriv, COMP_FW, DBG_TRACE, "FW size is %d bytes,\n", size);
 	if (rtlhal->hw_type == HARDWARE_TYPE_RTL8192DE)
-		_rtl92d_fill_dummy(bufferPtr, &size);
+		rtl_fill_dummy(bufferptr, &size);
 	pagenums = size / FW_8192D_PAGE_SIZE;
-	remainSize = size % FW_8192D_PAGE_SIZE;
+	remainsize = size % FW_8192D_PAGE_SIZE;
 	if (pagenums > 8)
 		pr_err("Page numbers should not greater then 8\n");
 	for (page = 0; page < pagenums; page++) {
 		offset = page * FW_8192D_PAGE_SIZE;
-		_rtl92d_fw_page_write(hw, page, (bufferPtr + offset),
-				      FW_8192D_PAGE_SIZE);
+		rtl_fw_page_write(hw, page, (bufferptr + offset),
+				  FW_8192D_PAGE_SIZE);
 	}
-	if (remainSize) {
+	if (remainsize) {
 		offset = pagenums * FW_8192D_PAGE_SIZE;
 		page = pagenums;
-		_rtl92d_fw_page_write(hw, page, (bufferPtr + offset),
-				      remainSize);
+		rtl_fw_page_write(hw, page, (bufferptr + offset), remainsize);
 	}
 }
 
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