/lib/firmware/carl9170fw/carlfw/src/cam.c is in linux-firmware 1.173.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 | /*
* carl9170 firmware - used by the ar9170 wireless device
*
* Security Engine
*
* Copyright (c) 2000-2005 ZyDAS Technology Corporation
* Copyright (c) 2007-2009 Atheros Communications, Inc.
* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
* Copyright 2009-2011 Christian Lamparter <chunkeey@googlemail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "carl9170.h"
#include "cam.h"
#ifdef CONFIG_CARL9170FW_SECURITY_ENGINE
static void disable_cam_user(const uint16_t userId)
{
if (userId <= 31)
andl(AR9170_MAC_REG_CAM_ROLL_CALL_TBL_L, (~((uint32_t) 1 << userId)));
else if (userId <= 63)
andl(AR9170_MAC_REG_CAM_ROLL_CALL_TBL_H, (~((uint32_t) 1 << (userId - 32))));
}
static void enable_cam_user(const uint16_t userId)
{
if (userId <= 31)
orl(AR9170_MAC_REG_CAM_ROLL_CALL_TBL_L, (((uint32_t) 1) << userId));
else if (userId <= 63)
orl(AR9170_MAC_REG_CAM_ROLL_CALL_TBL_H, (((uint32_t) 1) << (userId - 32)));
}
static void wait_for_cam_read_ready(void)
{
while ((get(AR9170_MAC_REG_CAM_STATE) & AR9170_MAC_CAM_STATE_READ_PENDING) == 0) {
/*
* wait
*/
}
}
static void wait_for_cam_write_ready(void)
{
while ((get(AR9170_MAC_REG_CAM_STATE) & AR9170_MAC_CAM_STATE_WRITE_PENDING) == 0) {
/*
* wait some more
*/
}
}
static void HW_CAM_Avail(void)
{
uint32_t tmpValue;
do {
tmpValue = get(AR9170_MAC_REG_CAM_MODE);
} while (tmpValue & AR9170_MAC_CAM_HOST_PENDING);
}
static void HW_CAM_Write128(const uint32_t address, const uint32_t *data)
{
HW_CAM_Avail();
set(AR9170_MAC_REG_CAM_DATA0, data[0]);
set(AR9170_MAC_REG_CAM_DATA1, data[1]);
set(AR9170_MAC_REG_CAM_DATA2, data[2]);
set(AR9170_MAC_REG_CAM_DATA3, data[3]);
set(AR9170_MAC_REG_CAM_ADDR, address | AR9170_MAC_CAM_ADDR_WRITE);
wait_for_cam_write_ready();
}
static void HW_CAM_Read128(const uint32_t address, uint32_t *data)
{
HW_CAM_Avail();
set(AR9170_MAC_REG_CAM_ADDR, address);
wait_for_cam_read_ready();
HW_CAM_Avail();
data[0] = get(AR9170_MAC_REG_CAM_DATA0);
data[1] = get(AR9170_MAC_REG_CAM_DATA1);
data[2] = get(AR9170_MAC_REG_CAM_DATA2);
data[3] = get(AR9170_MAC_REG_CAM_DATA3);
}
void set_key(const struct carl9170_set_key_cmd *key)
{
uint32_t data[4];
uint16_t row, wordId, nibbleId, i;
if (key->user > (AR9170_CAM_MAX_USER + 3))
return ;
if (key->keyId > 1)
return ;
/* Disable Key */
disable_cam_user(key->user);
/* Set encrypt type */
if (key->user >= AR9170_CAM_MAX_USER) {
/* default */
row = DEFAULT_ENCRY_TYPE;
wordId = 0;
nibbleId = (key->user - AR9170_CAM_MAX_USER) & 0x7;
} else {
row = ENCRY_TYPE_START_ADDR + (key->user >> 5);
wordId = (key->user >> 3) & 0x3;
nibbleId = key->user & 0x7;
}
HW_CAM_Read128(row, data);
data[wordId] &= (~(0xf << ((uint32_t) nibbleId * 4)));
data[wordId] |= (key->type << ((uint32_t) nibbleId * 4));
HW_CAM_Write128(row, data);
/* Set MAC address */
if (key->user < AR9170_CAM_MAX_USER) {
uint16_t byteId;
wordId = (key->user >> 2) & 0x3;
byteId = key->user & 0x3;
row = (key->user >> 4) * 6;
for (i = 0; i < 6; i++) {
HW_CAM_Read128(row + i, data);
data[wordId] &= (~(0xff << ((uint32_t) byteId * 8)));
data[wordId] |= (key->macAddr[i] << ((uint32_t) byteId * 8));
HW_CAM_Write128(row + i, data);
}
}
/* Set key */
row = KEY_START_ADDR + (key->user * 2) + key->keyId;
HW_CAM_Write128(row, key->key);
/* Enable Key */
enable_cam_user(key->user);
}
void disable_key(const struct carl9170_disable_key_cmd *key)
{
disable_cam_user(key->user);
}
#endif /* CONFIG_CARL9170FW_SECURITY_ENGINE */
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