drivers/staging/rtl8192ee/cam.c - linux - Git at Google

 /******************************************************************************
  *
  * Copyright(c) 2009-2010  Realtek Corporation.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of version 2 of the GNU General Public License as
  * published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  * more details.
  *
  * The full GNU General Public License is included in this distribution in the
  * file called LICENSE.
  *
  * Contact Information:
  * wlanfae <wlanfae@realtek.com>
  * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
  * Hsinchu 300, Taiwan.
  *
  * Larry Finger <Larry.Finger@lwfinger.net>
  *
  *****************************************************************************/
 #include "wifi.h"
 #include "cam.h"

 void rtl92e_cam_reset_sec_info(struct ieee80211_hw *hw)
 {
 	struct rtl_priv *rtlpriv = rtl_priv(hw);

 	rtlpriv->sec.use_defaultkey = false;
 	rtlpriv->sec.pairwise_enc_algorithm = NO_ENCRYPTION;
 	rtlpriv->sec.group_enc_algorithm = NO_ENCRYPTION;
 	memset(rtlpriv->sec.key_buf, 0, KEY_BUF_SIZE * MAX_KEY_LEN);
 	memset(rtlpriv->sec.key_len, 0, KEY_BUF_SIZE);
 	rtlpriv->sec.pairwise_key = NULL;
 }

 static void rtl_cam_program_entry(struct ieee80211_hw *hw, u32 entry_no,
 				  u8 *mac_addr, u8 *key_cont_128, u16 us_config)
 {
 	struct rtl_priv *rtlpriv = rtl_priv(hw);

 	u32 target_command;
 	u32 target_content = 0;
 	u8 entry_i;

 	RT_PRINT_DATA(rtlpriv, COMP_SEC, DBG_DMESG, "Key content:",
 		      key_cont_128, 16);

 	for (entry_i = 0; entry_i < CAM_CONTENT_COUNT; entry_i++) {
 		target_command = entry_i + CAM_CONTENT_COUNT * entry_no;
 		target_command = target_command | BIT(31) | BIT(16);

 		if (entry_i == 0) {
 			target_content = (u32) (*(mac_addr + 0)) << 16 |
 			    (u32) (*(mac_addr + 1)) << 24 | (u32) us_config;

 			rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI],
 					target_content);
 			rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM],
 					target_command);

 			RT_TRACE(COMP_SEC, DBG_LOUD,
 				 ("WRITE %x: %x\n",
 				  rtlpriv->cfg->maps[WCAMI], target_content));
 			RT_TRACE(COMP_SEC, DBG_LOUD,
 				 ("The Key ID is %d\n", entry_no));
 			RT_TRACE(COMP_SEC, DBG_LOUD,
 				 ("WRITE %x: %x\n",
 				  rtlpriv->cfg->maps[RWCAM], target_command));
 		} else if (entry_i == 1) {
 			target_content = (u32) (*(mac_addr + 5)) << 24 |
 			    (u32) (*(mac_addr + 4)) << 16 |
 			    (u32) (*(mac_addr + 3)) << 8 |
 			    (u32) (*(mac_addr + 2));

 			rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI],
 					target_content);
 			rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM],
 					target_command);

 			RT_TRACE(COMP_SEC, DBG_LOUD,
 				 ("WRITE A4: %x\n", target_content));
 			RT_TRACE(COMP_SEC, DBG_LOUD,
 				 ("WRITE A0: %x\n", target_command));
 		} else {
 			target_content =
 			    (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 3)) <<
 			    24 | (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 2))
 			    << 16 |
 			    (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 1)) << 8
 			    | (u32) (*(key_cont_128 + (entry_i * 4 - 8) + 0));

 			rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI],
 					target_content);
 			rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM],
 					target_command);
 			udelay(100);

 			RT_TRACE(COMP_SEC, DBG_LOUD,
 				 ("WRITE A4: %x\n", target_content));
 			RT_TRACE(COMP_SEC, DBG_LOUD,
 				 ("WRITE A0: %x\n", target_command));
 		}
 	}

 	RT_TRACE(COMP_SEC, DBG_LOUD,
 		 ("after set key, usconfig:%x\n", us_config));
 }

 u8 stg_rtl_cam_add_one_entry(struct ieee80211_hw *hw, u8 *mac_addr,
 			     u32 ul_key_id, u32 ul_entry_idx, u32 ul_enc_alg,
 			     u32 ul_default_key, u8 *key_content)
 {
 	u32 us_config;
 	struct rtl_priv *rtlpriv = rtl_priv(hw);

 	RT_TRACE(COMP_SEC, DBG_DMESG,
 		 ("EntryNo:%x, ulKeyId=%x, ulEncAlg=%x, ulUseDK=%x MacAddr %pM\n",
 		  ul_entry_idx, ul_key_id, ul_enc_alg,
 		  ul_default_key, mac_addr));

 	if (ul_key_id == TOTAL_CAM_ENTRY) {
 		RT_TRACE(COMP_ERR, DBG_WARNING,
 			 ("ulKeyId exceed!\n"));
 		return 0;
 	}

 	if (ul_default_key == 1)
 		us_config = CFG_VALID | ((u16) (ul_enc_alg) << 2);
 	else
 		us_config = CFG_VALID | ((ul_enc_alg) << 2) | ul_key_id;

 	rtl_cam_program_entry(hw, ul_entry_idx, mac_addr,
 			      (u8 *)key_content, us_config);

 	RT_TRACE(COMP_SEC, DBG_DMESG, ("end\n"));

 	return 1;
 }
 EXPORT_SYMBOL(stg_rtl_cam_add_one_entry);

 int stg_rtl_cam_delete_one_entry(struct ieee80211_hw *hw,
 				 u8 *mac_addr, u32 ul_key_id)
 {
 	u32 ul_command;
 	struct rtl_priv *rtlpriv = rtl_priv(hw);

 	RT_TRACE(COMP_SEC, DBG_DMESG, ("key_idx:%d\n", ul_key_id));

 	ul_command = ul_key_id * CAM_CONTENT_COUNT;
 	ul_command = ul_command | BIT(31) | BIT(16);

 	rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], 0);
 	rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);

 	RT_TRACE(COMP_SEC, DBG_DMESG,
 		 ("stg_rtl_cam_delete_one_entry(): WRITE A4: %x\n", 0));
 	RT_TRACE(COMP_SEC, DBG_DMESG,
 		 ("stg_rtl_cam_delete_one_entry(): WRITE A0: %x\n",
 		  ul_command));
 	return 0;
 }
 EXPORT_SYMBOL(stg_rtl_cam_delete_one_entry);

 void stg_rtl_cam_reset_all_entry(struct ieee80211_hw *hw)
 {
 	u32 ul_command;
 	struct rtl_priv *rtlpriv = rtl_priv(hw);

 	ul_command = BIT(31) | BIT(30);
 	rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);
 }
 EXPORT_SYMBOL(stg_rtl_cam_reset_all_entry);

 void stg_rtl_cam_mark_invalid(struct ieee80211_hw *hw, u8 uc_index)
 {
 	struct rtl_priv *rtlpriv = rtl_priv(hw);

 	u32 ul_command;
 	u32 ul_content;
 	u32 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES];

 	switch (rtlpriv->sec.pairwise_enc_algorithm) {
 	case WEP40_ENCRYPTION:
 		ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_WEP40];
 		break;
 	case WEP104_ENCRYPTION:
 		ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_WEP104];
 		break;
 	case TKIP_ENCRYPTION:
 		ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_TKIP];
 		break;
 	case AESCCMP_ENCRYPTION:
 		ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES];
 		break;
 	default:
 		ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES];
 	}

 	ul_content = (uc_index & 3) | ((u16) (ul_enc_algo) << 2);

 	ul_content |= BIT(15);
 	ul_command = CAM_CONTENT_COUNT * uc_index;
 	ul_command = ul_command | BIT(31) | BIT(16);

 	rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], ul_content);
 	rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);

 	RT_TRACE(COMP_SEC, DBG_DMESG,
 		 ("stg_rtl_cam_mark_invalid(): WRITE A4: %x\n", ul_content));
 	RT_TRACE(COMP_SEC, DBG_DMESG,
 		 ("stg_rtl_cam_mark_invalid(): WRITE A0: %x\n", ul_command));
 }
 EXPORT_SYMBOL(stg_rtl_cam_mark_invalid);

 void stg_rtl_cam_empty_entry(struct ieee80211_hw *hw, u8 uc_index)
 {
 	struct rtl_priv *rtlpriv = rtl_priv(hw);

 	u32 ul_command;
 	u32 ul_content;
 	u32 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES];
 	u8 entry_i;

 	switch (rtlpriv->sec.pairwise_enc_algorithm) {
 	case WEP40_ENCRYPTION:
 		ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_WEP40];
 		break;
 	case WEP104_ENCRYPTION:
 		ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_WEP104];
 		break;
 	case TKIP_ENCRYPTION:
 		ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_TKIP];
 		break;
 	case AESCCMP_ENCRYPTION:
 		ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES];
 		break;
 	default:
 		ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES];
 	}

 	for (entry_i = 0; entry_i < CAM_CONTENT_COUNT; entry_i++) {
 		if (entry_i == 0) {
 			ul_content =
 			    (uc_index & 0x03) | ((u16) (ul_encalgo) << 2);
 			ul_content |= BIT(15);

 		} else {
 			ul_content = 0;
 		}

 		ul_command = CAM_CONTENT_COUNT * uc_index + entry_i;
 		ul_command = ul_command | BIT(31) | BIT(16);

 		rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], ul_content);
 		rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);

 		RT_TRACE(COMP_SEC, DBG_LOUD,
 			 ("stg_rtl_cam_empty_entry(): WRITE A4: %x\n",
 			  ul_content));
 		RT_TRACE(COMP_SEC, DBG_LOUD,
 			 ("stg_rtl_cam_empty_entry(): WRITE A0: %x\n",
 			  ul_command));
 	}
 }
 EXPORT_SYMBOL(stg_rtl_cam_empty_entry);

 u8 stg_rtl_cam_get_free_entry(struct ieee80211_hw *hw, u8 *sta_addr)
 {
 	struct rtl_priv *rtlpriv = rtl_priv(hw);
 	u32 bitmap = (rtlpriv->sec.hwsec_cam_bitmap) >> 4;
 	u8 entry_idx = 0;
 	u8 i, *addr;

 	if (!sta_addr) {
 		RT_TRACE(COMP_SEC, DBG_EMERG,
 			 ("sta_addr is NULL\n"));
 		return TOTAL_CAM_ENTRY;
 	}
 	/* Does STA already exist? */
 	for (i = 4; i < TOTAL_CAM_ENTRY; i++) {
 		addr = rtlpriv->sec.hwsec_cam_sta_addr[i];
 		if (memcmp(addr, sta_addr, ETH_ALEN) == 0)
 			return i;
 	}
 	/* Get a free CAM entry. */
 	for (entry_idx = 4; entry_idx < TOTAL_CAM_ENTRY; entry_idx++) {
 		if ((bitmap & BIT(0)) == 0) {
 			RT_TRACE(COMP_SEC, DBG_EMERG,
 				 ("-----hwsec_cam_bitmap: 0x%x entry_idx=%d\n",
 					  rtlpriv->sec.hwsec_cam_bitmap, entry_idx));
 			rtlpriv->sec.hwsec_cam_bitmap |= BIT(0) << entry_idx;
 			memcpy(rtlpriv->sec.hwsec_cam_sta_addr[entry_idx],
 			       sta_addr, ETH_ALEN);
 			return entry_idx;
 		}
 		bitmap = bitmap >> 1;
 	}
 	return TOTAL_CAM_ENTRY;
 }
 EXPORT_SYMBOL(stg_rtl_cam_get_free_entry);

 void stg_rtl_cam_del_entry(struct ieee80211_hw *hw, u8 *sta_addr)
 {
 	struct rtl_priv *rtlpriv = rtl_priv(hw);
 	u32 bitmap;
 	u8 i, *addr;

 	if (NULL == sta_addr) {
 		RT_TRACE(COMP_SEC, DBG_EMERG,
 			 ("sta_addr is NULL.\n"));
 		return;
 	}

 	if (is_zero_ether_addr(sta_addr)) {
 		RT_TRACE(COMP_SEC, DBG_EMERG,
 			 ("sta_addr is 00:00:00:00:00:00.\n"));
 		return;
 	}
 	/* Does STA already exist? */
 	for (i = 4; i < TOTAL_CAM_ENTRY; i++) {
 		addr = rtlpriv->sec.hwsec_cam_sta_addr[i];
 		bitmap = (rtlpriv->sec.hwsec_cam_bitmap) >> i;
 		if (((bitmap & BIT(0)) == BIT(0)) &&
 		    (memcmp(addr, sta_addr, ETH_ALEN) == 0)) {
 			/* Remove from HW Security CAM */
 			memset(rtlpriv->sec.hwsec_cam_sta_addr[i], 0, ETH_ALEN);
 			rtlpriv->sec.hwsec_cam_bitmap &= ~(BIT(0) << i);
 			pr_info("&&&&&&&&&del entry %d\n", i);
 		}
 	}
 	return;
 }
 EXPORT_SYMBOL(stg_rtl_cam_del_entry);
	/******************************************************************************
	*
	* Copyright(c) 2009-2010 Realtek Corporation.
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms of version 2 of the GNU General Public License as
	* published by the Free Software Foundation.
	*
	* This program is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	* more details.
	*
	* The full GNU General Public License is included in this distribution in the
	* file called LICENSE.
	*
	* Contact Information:
	* wlanfae <wlanfae@realtek.com>
	* Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
	* Hsinchu 300, Taiwan.
	*
	* Larry Finger <Larry.Finger@lwfinger.net>
	*
	*****************************************************************************/
	#include "wifi.h"
	#include "cam.h"

	void rtl92e_cam_reset_sec_info(struct ieee80211_hw *hw)
	{
	struct rtl_priv *rtlpriv = rtl_priv(hw);

	rtlpriv->sec.use_defaultkey = false;
	rtlpriv->sec.pairwise_enc_algorithm = NO_ENCRYPTION;
	rtlpriv->sec.group_enc_algorithm = NO_ENCRYPTION;
	memset(rtlpriv->sec.key_buf, 0, KEY_BUF_SIZE * MAX_KEY_LEN);
	memset(rtlpriv->sec.key_len, 0, KEY_BUF_SIZE);
	rtlpriv->sec.pairwise_key = NULL;
	}

	static void rtl_cam_program_entry(struct ieee80211_hw *hw, u32 entry_no,
	u8 mac_addr, u8 key_cont_128, u16 us_config)
	{
	struct rtl_priv *rtlpriv = rtl_priv(hw);

	u32 target_command;
	u32 target_content = 0;
	u8 entry_i;

	RT_PRINT_DATA(rtlpriv, COMP_SEC, DBG_DMESG, "Key content:",
	key_cont_128, 16);

	for (entry_i = 0; entry_i < CAM_CONTENT_COUNT; entry_i++) {
	target_command = entry_i + CAM_CONTENT_COUNT * entry_no;
	target_command = target_command \| BIT(31) \| BIT(16);

	if (entry_i == 0) {
	target_content = (u32) (*(mac_addr + 0)) << 16 \|
	(u32) (*(mac_addr + 1)) << 24 \| (u32) us_config;

	rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI],
	target_content);
	rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM],
	target_command);

	RT_TRACE(COMP_SEC, DBG_LOUD,
	("WRITE %x: %x\n",
	rtlpriv->cfg->maps[WCAMI], target_content));
	RT_TRACE(COMP_SEC, DBG_LOUD,
	("The Key ID is %d\n", entry_no));
	RT_TRACE(COMP_SEC, DBG_LOUD,
	("WRITE %x: %x\n",
	rtlpriv->cfg->maps[RWCAM], target_command));
	} else if (entry_i == 1) {
	target_content = (u32) (*(mac_addr + 5)) << 24 \|
	(u32) (*(mac_addr + 4)) << 16 \|
	(u32) (*(mac_addr + 3)) << 8 \|
	(u32) (*(mac_addr + 2));

	rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI],
	target_content);
	rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM],
	target_command);

	RT_TRACE(COMP_SEC, DBG_LOUD,
	("WRITE A4: %x\n", target_content));
	RT_TRACE(COMP_SEC, DBG_LOUD,
	("WRITE A0: %x\n", target_command));
	} else {
	target_content =
	(u32) ((key_cont_128 + (entry_i 4 - 8) + 3)) <<
	24 \| (u32) ((key_cont_128 + (entry_i 4 - 8) + 2))
	<< 16 \|
	(u32) ((key_cont_128 + (entry_i 4 - 8) + 1)) << 8
	\| (u32) ((key_cont_128 + (entry_i 4 - 8) + 0));

	rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI],
	target_content);
	rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM],
	target_command);
	udelay(100);

	RT_TRACE(COMP_SEC, DBG_LOUD,
	("WRITE A4: %x\n", target_content));
	RT_TRACE(COMP_SEC, DBG_LOUD,
	("WRITE A0: %x\n", target_command));
	}
	}

	RT_TRACE(COMP_SEC, DBG_LOUD,
	("after set key, usconfig:%x\n", us_config));
	}

	u8 stg_rtl_cam_add_one_entry(struct ieee80211_hw hw, u8 mac_addr,
	u32 ul_key_id, u32 ul_entry_idx, u32 ul_enc_alg,
	u32 ul_default_key, u8 *key_content)
	{
	u32 us_config;
	struct rtl_priv *rtlpriv = rtl_priv(hw);

	RT_TRACE(COMP_SEC, DBG_DMESG,
	("EntryNo:%x, ulKeyId=%x, ulEncAlg=%x, ulUseDK=%x MacAddr %pM\n",
	ul_entry_idx, ul_key_id, ul_enc_alg,
	ul_default_key, mac_addr));

	if (ul_key_id == TOTAL_CAM_ENTRY) {
	RT_TRACE(COMP_ERR, DBG_WARNING,
	("ulKeyId exceed!\n"));
	return 0;
	}

	if (ul_default_key == 1)
	us_config = CFG_VALID \| ((u16) (ul_enc_alg) << 2);
	else
	us_config = CFG_VALID \| ((ul_enc_alg) << 2) \| ul_key_id;

	rtl_cam_program_entry(hw, ul_entry_idx, mac_addr,
	(u8 *)key_content, us_config);

	RT_TRACE(COMP_SEC, DBG_DMESG, ("end\n"));

	return 1;
	}
	EXPORT_SYMBOL(stg_rtl_cam_add_one_entry);

	int stg_rtl_cam_delete_one_entry(struct ieee80211_hw *hw,
	u8 *mac_addr, u32 ul_key_id)
	{
	u32 ul_command;
	struct rtl_priv *rtlpriv = rtl_priv(hw);

	RT_TRACE(COMP_SEC, DBG_DMESG, ("key_idx:%d\n", ul_key_id));

	ul_command = ul_key_id * CAM_CONTENT_COUNT;
	ul_command = ul_command \| BIT(31) \| BIT(16);

	rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], 0);
	rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);

	RT_TRACE(COMP_SEC, DBG_DMESG,
	("stg_rtl_cam_delete_one_entry(): WRITE A4: %x\n", 0));
	RT_TRACE(COMP_SEC, DBG_DMESG,
	("stg_rtl_cam_delete_one_entry(): WRITE A0: %x\n",
	ul_command));
	return 0;
	}
	EXPORT_SYMBOL(stg_rtl_cam_delete_one_entry);

	void stg_rtl_cam_reset_all_entry(struct ieee80211_hw *hw)
	{
	u32 ul_command;
	struct rtl_priv *rtlpriv = rtl_priv(hw);

	ul_command = BIT(31) \| BIT(30);
	rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);
	}
	EXPORT_SYMBOL(stg_rtl_cam_reset_all_entry);

	void stg_rtl_cam_mark_invalid(struct ieee80211_hw *hw, u8 uc_index)
	{
	struct rtl_priv *rtlpriv = rtl_priv(hw);

	u32 ul_command;
	u32 ul_content;
	u32 ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES];

	switch (rtlpriv->sec.pairwise_enc_algorithm) {
	case WEP40_ENCRYPTION:
	ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_WEP40];
	break;
	case WEP104_ENCRYPTION:
	ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_WEP104];
	break;
	case TKIP_ENCRYPTION:
	ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_TKIP];
	break;
	case AESCCMP_ENCRYPTION:
	ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES];
	break;
	default:
	ul_enc_algo = rtlpriv->cfg->maps[SEC_CAM_AES];
	}

	ul_content = (uc_index & 3) \| ((u16) (ul_enc_algo) << 2);

	ul_content \|= BIT(15);
	ul_command = CAM_CONTENT_COUNT * uc_index;
	ul_command = ul_command \| BIT(31) \| BIT(16);

	rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], ul_content);
	rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);

	RT_TRACE(COMP_SEC, DBG_DMESG,
	("stg_rtl_cam_mark_invalid(): WRITE A4: %x\n", ul_content));
	RT_TRACE(COMP_SEC, DBG_DMESG,
	("stg_rtl_cam_mark_invalid(): WRITE A0: %x\n", ul_command));
	}
	EXPORT_SYMBOL(stg_rtl_cam_mark_invalid);

	void stg_rtl_cam_empty_entry(struct ieee80211_hw *hw, u8 uc_index)
	{
	struct rtl_priv *rtlpriv = rtl_priv(hw);

	u32 ul_command;
	u32 ul_content;
	u32 ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES];
	u8 entry_i;

	switch (rtlpriv->sec.pairwise_enc_algorithm) {
	case WEP40_ENCRYPTION:
	ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_WEP40];
	break;
	case WEP104_ENCRYPTION:
	ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_WEP104];
	break;
	case TKIP_ENCRYPTION:
	ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_TKIP];
	break;
	case AESCCMP_ENCRYPTION:
	ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES];
	break;
	default:
	ul_encalgo = rtlpriv->cfg->maps[SEC_CAM_AES];
	}

	for (entry_i = 0; entry_i < CAM_CONTENT_COUNT; entry_i++) {
	if (entry_i == 0) {
	ul_content =
	(uc_index & 0x03) \| ((u16) (ul_encalgo) << 2);
	ul_content \|= BIT(15);

	} else {
	ul_content = 0;
	}

	ul_command = CAM_CONTENT_COUNT * uc_index + entry_i;
	ul_command = ul_command \| BIT(31) \| BIT(16);

	rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[WCAMI], ul_content);
	rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], ul_command);

	RT_TRACE(COMP_SEC, DBG_LOUD,
	("stg_rtl_cam_empty_entry(): WRITE A4: %x\n",
	ul_content));
	RT_TRACE(COMP_SEC, DBG_LOUD,
	("stg_rtl_cam_empty_entry(): WRITE A0: %x\n",
	ul_command));
	}
	}
	EXPORT_SYMBOL(stg_rtl_cam_empty_entry);

	u8 stg_rtl_cam_get_free_entry(struct ieee80211_hw hw, u8 sta_addr)
	{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	u32 bitmap = (rtlpriv->sec.hwsec_cam_bitmap) >> 4;
	u8 entry_idx = 0;
	u8 i, *addr;

	if (!sta_addr) {
	RT_TRACE(COMP_SEC, DBG_EMERG,
	("sta_addr is NULL\n"));
	return TOTAL_CAM_ENTRY;
	}
	/* Does STA already exist? */
	for (i = 4; i < TOTAL_CAM_ENTRY; i++) {
	addr = rtlpriv->sec.hwsec_cam_sta_addr[i];
	if (memcmp(addr, sta_addr, ETH_ALEN) == 0)
	return i;
	}
	/* Get a free CAM entry. */
	for (entry_idx = 4; entry_idx < TOTAL_CAM_ENTRY; entry_idx++) {
	if ((bitmap & BIT(0)) == 0) {
	RT_TRACE(COMP_SEC, DBG_EMERG,
	("-----hwsec_cam_bitmap: 0x%x entry_idx=%d\n",
	rtlpriv->sec.hwsec_cam_bitmap, entry_idx));
	rtlpriv->sec.hwsec_cam_bitmap \|= BIT(0) << entry_idx;
	memcpy(rtlpriv->sec.hwsec_cam_sta_addr[entry_idx],
	sta_addr, ETH_ALEN);
	return entry_idx;
	}
	bitmap = bitmap >> 1;
	}
	return TOTAL_CAM_ENTRY;
	}
	EXPORT_SYMBOL(stg_rtl_cam_get_free_entry);

	void stg_rtl_cam_del_entry(struct ieee80211_hw hw, u8 sta_addr)
	{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	u32 bitmap;
	u8 i, *addr;

	if (NULL == sta_addr) {
	RT_TRACE(COMP_SEC, DBG_EMERG,
	("sta_addr is NULL.\n"));
	return;
	}

	if (is_zero_ether_addr(sta_addr)) {
	RT_TRACE(COMP_SEC, DBG_EMERG,
	("sta_addr is 00:00:00:00:00:00.\n"));
	return;
	}
	/* Does STA already exist? */
	for (i = 4; i < TOTAL_CAM_ENTRY; i++) {
	addr = rtlpriv->sec.hwsec_cam_sta_addr[i];
	bitmap = (rtlpriv->sec.hwsec_cam_bitmap) >> i;
	if (((bitmap & BIT(0)) == BIT(0)) &&
	(memcmp(addr, sta_addr, ETH_ALEN) == 0)) {
	/* Remove from HW Security CAM */
	memset(rtlpriv->sec.hwsec_cam_sta_addr[i], 0, ETH_ALEN);
	rtlpriv->sec.hwsec_cam_bitmap &= ~(BIT(0) << i);
	pr_info("&&&&&&&&&del entry %d\n", i);
	}
	}
	return;
	}
	EXPORT_SYMBOL(stg_rtl_cam_del_entry);