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linux/drivers/net/wireless/iwlwifi/iwl-eeprom.c

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/******************************************************************************
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2008 - 2012 Intel Corporation. All rights reserved.
*
* 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.
*
* 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,
* USA
*
* The full GNU General Public License is included in this distribution
* in the file called LICENSE.GPL.
*
* Contact Information:
* Intel Linux Wireless <ilw@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
* BSD LICENSE
*
* Copyright(c) 2005 - 2012 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*****************************************************************************/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <net/mac80211.h>
#include "iwl-dev.h"
#include "iwl-debug.h"
#include "iwl-agn.h"
#include "iwl-eeprom.h"
#include "iwl-io.h"
#include "iwl-prph.h"
/************************** EEPROM BANDS ****************************
*
* The iwl_eeprom_band definitions below provide the mapping from the
* EEPROM contents to the specific channel number supported for each
* band.
*
* For example, iwl_priv->eeprom.band_3_channels[4] from the band_3
* definition below maps to physical channel 42 in the 5.2GHz spectrum.
* The specific geography and calibration information for that channel
* is contained in the eeprom map itself.
*
* During init, we copy the eeprom information and channel map
* information into priv->channel_info_24/52 and priv->channel_map_24/52
*
* channel_map_24/52 provides the index in the channel_info array for a
* given channel. We have to have two separate maps as there is channel
* overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
* band_2
*
* A value of 0xff stored in the channel_map indicates that the channel
* is not supported by the hardware at all.
*
* A value of 0xfe in the channel_map indicates that the channel is not
* valid for Tx with the current hardware. This means that
* while the system can tune and receive on a given channel, it may not
* be able to associate or transmit any frames on that
* channel. There is no corresponding channel information for that
* entry.
*
*********************************************************************/
/* 2.4 GHz */
const u8 iwl_eeprom_band_1[14] = {
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
};
/* 5.2 GHz bands */
static const u8 iwl_eeprom_band_2[] = { /* 4915-5080MHz */
183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
};
static const u8 iwl_eeprom_band_3[] = { /* 5170-5320MHz */
34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
};
static const u8 iwl_eeprom_band_4[] = { /* 5500-5700MHz */
100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
};
static const u8 iwl_eeprom_band_5[] = { /* 5725-5825MHz */
145, 149, 153, 157, 161, 165
};
static const u8 iwl_eeprom_band_6[] = { /* 2.4 ht40 channel */
1, 2, 3, 4, 5, 6, 7
};
static const u8 iwl_eeprom_band_7[] = { /* 5.2 ht40 channel */
36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
};
/******************************************************************************
*
* generic NVM functions
*
******************************************************************************/
/*
* The device's EEPROM semaphore prevents conflicts between driver and uCode
* when accessing the EEPROM; each access is a series of pulses to/from the
* EEPROM chip, not a single event, so even reads could conflict if they
* weren't arbitrated by the semaphore.
*/
#define EEPROM_SEM_TIMEOUT 10 /* milliseconds */
#define EEPROM_SEM_RETRY_LIMIT 1000 /* number of attempts (not time) */
static int iwl_eeprom_acquire_semaphore(struct iwl_trans *trans)
{
u16 count;
int ret;
for (count = 0; count < EEPROM_SEM_RETRY_LIMIT; count++) {
/* Request semaphore */
iwl_set_bit(trans, CSR_HW_IF_CONFIG_REG,
CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
/* See if we got it */
ret = iwl_poll_bit(trans, CSR_HW_IF_CONFIG_REG,
CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
EEPROM_SEM_TIMEOUT);
if (ret >= 0) {
IWL_DEBUG_EEPROM(trans,
"Acquired semaphore after %d tries.\n",
count+1);
return ret;
}
}
return ret;
}
static void iwl_eeprom_release_semaphore(struct iwl_trans *trans)
{
iwl_clear_bit(trans, CSR_HW_IF_CONFIG_REG,
CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
}
static int iwl_eeprom_verify_signature(struct iwl_priv *priv)
{
u32 gp = iwl_read32(priv->trans, CSR_EEPROM_GP) &
CSR_EEPROM_GP_VALID_MSK;
int ret = 0;
IWL_DEBUG_EEPROM(priv, "EEPROM signature=0x%08x\n", gp);
switch (gp) {
case CSR_EEPROM_GP_BAD_SIG_EEP_GOOD_SIG_OTP:
if (priv->nvm_device_type != NVM_DEVICE_TYPE_OTP) {
IWL_ERR(priv, "EEPROM with bad signature: 0x%08x\n",
gp);
ret = -ENOENT;
}
break;
case CSR_EEPROM_GP_GOOD_SIG_EEP_LESS_THAN_4K:
case CSR_EEPROM_GP_GOOD_SIG_EEP_MORE_THAN_4K:
if (priv->nvm_device_type != NVM_DEVICE_TYPE_EEPROM) {
IWL_ERR(priv, "OTP with bad signature: 0x%08x\n", gp);
ret = -ENOENT;
}
break;
case CSR_EEPROM_GP_BAD_SIGNATURE_BOTH_EEP_AND_OTP:
default:
IWL_ERR(priv, "bad EEPROM/OTP signature, type=%s, "
"EEPROM_GP=0x%08x\n",
(priv->nvm_device_type == NVM_DEVICE_TYPE_OTP)
? "OTP" : "EEPROM", gp);
ret = -ENOENT;
break;
}
return ret;
}
u16 iwl_eeprom_query16(struct iwl_priv *priv, size_t offset)
{
if (!priv->eeprom)
return 0;
return (u16)priv->eeprom[offset] | ((u16)priv->eeprom[offset + 1] << 8);
}
int iwl_eeprom_check_version(struct iwl_priv *priv)
{
u16 eeprom_ver;
u16 calib_ver;
eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
calib_ver = iwl_eeprom_calib_version(priv);
if (eeprom_ver < priv->cfg->eeprom_ver ||
calib_ver < priv->cfg->eeprom_calib_ver)
goto err;
IWL_INFO(priv, "device EEPROM VER=0x%x, CALIB=0x%x\n",
eeprom_ver, calib_ver);
return 0;
err:
IWL_ERR(priv, "Unsupported (too old) EEPROM VER=0x%x < 0x%x "
"CALIB=0x%x < 0x%x\n",
eeprom_ver, priv->cfg->eeprom_ver,
calib_ver, priv->cfg->eeprom_calib_ver);
return -EINVAL;
}
int iwl_eeprom_init_hw_params(struct iwl_priv *priv)
{
u16 radio_cfg;
priv->hw_params.sku = iwl_eeprom_query16(priv, EEPROM_SKU_CAP);
if (priv->hw_params.sku & EEPROM_SKU_CAP_11N_ENABLE &&
!priv->cfg->ht_params) {
IWL_ERR(priv, "Invalid 11n configuration\n");
return -EINVAL;
}
if (!priv->hw_params.sku) {
IWL_ERR(priv, "Invalid device sku\n");
return -EINVAL;
}
IWL_INFO(priv, "Device SKU: 0x%X\n", priv->hw_params.sku);
radio_cfg = iwl_eeprom_query16(priv, EEPROM_RADIO_CONFIG);
priv->hw_params.valid_tx_ant = EEPROM_RF_CFG_TX_ANT_MSK(radio_cfg);
priv->hw_params.valid_rx_ant = EEPROM_RF_CFG_RX_ANT_MSK(radio_cfg);
/* check overrides (some devices have wrong EEPROM) */
if (priv->cfg->valid_tx_ant)
priv->hw_params.valid_tx_ant = priv->cfg->valid_tx_ant;
if (priv->cfg->valid_rx_ant)
priv->hw_params.valid_rx_ant = priv->cfg->valid_rx_ant;
if (!priv->hw_params.valid_tx_ant || !priv->hw_params.valid_rx_ant) {
IWL_ERR(priv, "Invalid chain (0x%X, 0x%X)\n",
priv->hw_params.valid_tx_ant,
priv->hw_params.valid_rx_ant);
return -EINVAL;
}
IWL_INFO(priv, "Valid Tx ant: 0x%X, Valid Rx ant: 0x%X\n",
priv->hw_params.valid_tx_ant, priv->hw_params.valid_rx_ant);
return 0;
}
u16 iwl_eeprom_calib_version(struct iwl_priv *priv)
{
struct iwl_eeprom_calib_hdr *hdr;
hdr = (struct iwl_eeprom_calib_hdr *)iwl_eeprom_query_addr(priv,
EEPROM_CALIB_ALL);
return hdr->version;
}
static u32 eeprom_indirect_address(struct iwl_priv *priv, u32 address)
{
u16 offset = 0;
if ((address & INDIRECT_ADDRESS) == 0)
return address;
switch (address & INDIRECT_TYPE_MSK) {
case INDIRECT_HOST:
offset = iwl_eeprom_query16(priv, EEPROM_LINK_HOST);
break;
case INDIRECT_GENERAL:
offset = iwl_eeprom_query16(priv, EEPROM_LINK_GENERAL);
break;
case INDIRECT_REGULATORY:
offset = iwl_eeprom_query16(priv, EEPROM_LINK_REGULATORY);
break;
case INDIRECT_TXP_LIMIT:
offset = iwl_eeprom_query16(priv, EEPROM_LINK_TXP_LIMIT);
break;
case INDIRECT_TXP_LIMIT_SIZE:
offset = iwl_eeprom_query16(priv, EEPROM_LINK_TXP_LIMIT_SIZE);
break;
case INDIRECT_CALIBRATION:
offset = iwl_eeprom_query16(priv, EEPROM_LINK_CALIBRATION);
break;
case INDIRECT_PROCESS_ADJST:
offset = iwl_eeprom_query16(priv, EEPROM_LINK_PROCESS_ADJST);
break;
case INDIRECT_OTHERS:
offset = iwl_eeprom_query16(priv, EEPROM_LINK_OTHERS);
break;
default:
IWL_ERR(priv, "illegal indirect type: 0x%X\n",
address & INDIRECT_TYPE_MSK);
break;
}
/* translate the offset from words to byte */
return (address & ADDRESS_MSK) + (offset << 1);
}
const u8 *iwl_eeprom_query_addr(struct iwl_priv *priv, size_t offset)
{
u32 address = eeprom_indirect_address(priv, offset);
BUG_ON(address >= priv->cfg->base_params->eeprom_size);
return &priv->eeprom[address];
}
void iwl_eeprom_get_mac(struct iwl_priv *priv, u8 *mac)
{
const u8 *addr = iwl_eeprom_query_addr(priv,
EEPROM_MAC_ADDRESS);
memcpy(mac, addr, ETH_ALEN);
}
/******************************************************************************
*
* OTP related functions
*
******************************************************************************/
static void iwl_set_otp_access(struct iwl_trans *trans,
enum iwl_access_mode mode)
{
iwl_read32(trans, CSR_OTP_GP_REG);
if (mode == IWL_OTP_ACCESS_ABSOLUTE)
iwl_clear_bit(trans, CSR_OTP_GP_REG,
CSR_OTP_GP_REG_OTP_ACCESS_MODE);
else
iwl_set_bit(trans, CSR_OTP_GP_REG,
CSR_OTP_GP_REG_OTP_ACCESS_MODE);
}
static int iwl_get_nvm_type(struct iwl_trans *trans, u32 hw_rev)
{
u32 otpgp;
int nvm_type;
/* OTP only valid for CP/PP and after */
switch (hw_rev & CSR_HW_REV_TYPE_MSK) {
case CSR_HW_REV_TYPE_NONE:
IWL_ERR(trans, "Unknown hardware type\n");
return -ENOENT;
case CSR_HW_REV_TYPE_5300:
case CSR_HW_REV_TYPE_5350:
case CSR_HW_REV_TYPE_5100:
case CSR_HW_REV_TYPE_5150:
nvm_type = NVM_DEVICE_TYPE_EEPROM;
break;
default:
otpgp = iwl_read32(trans, CSR_OTP_GP_REG);
if (otpgp & CSR_OTP_GP_REG_DEVICE_SELECT)
nvm_type = NVM_DEVICE_TYPE_OTP;
else
nvm_type = NVM_DEVICE_TYPE_EEPROM;
break;
}
return nvm_type;
}
static int iwl_init_otp_access(struct iwl_trans *trans)
{
int ret;
/* Enable 40MHz radio clock */
iwl_write32(trans, CSR_GP_CNTRL,
iwl_read32(trans, CSR_GP_CNTRL) |
CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
/* wait for clock to be ready */
ret = iwl_poll_bit(trans, CSR_GP_CNTRL,
CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
25000);
if (ret < 0)
IWL_ERR(trans, "Time out access OTP\n");
else {
iwl_set_bits_prph(trans, APMG_PS_CTRL_REG,
APMG_PS_CTRL_VAL_RESET_REQ);
udelay(5);
iwl_clear_bits_prph(trans, APMG_PS_CTRL_REG,
APMG_PS_CTRL_VAL_RESET_REQ);
/*
* CSR auto clock gate disable bit -
* this is only applicable for HW with OTP shadow RAM
*/
if (trans->cfg->base_params->shadow_ram_support)
iwl_set_bit(trans, CSR_DBG_LINK_PWR_MGMT_REG,
CSR_RESET_LINK_PWR_MGMT_DISABLED);
}
return ret;
}
static int iwl_read_otp_word(struct iwl_trans *trans, u16 addr,
__le16 *eeprom_data)
{
int ret = 0;
u32 r;
u32 otpgp;
iwl_write32(trans, CSR_EEPROM_REG,
CSR_EEPROM_REG_MSK_ADDR & (addr << 1));
ret = iwl_poll_bit(trans, CSR_EEPROM_REG,
CSR_EEPROM_REG_READ_VALID_MSK,
CSR_EEPROM_REG_READ_VALID_MSK,
IWL_EEPROM_ACCESS_TIMEOUT);
if (ret < 0) {
IWL_ERR(trans, "Time out reading OTP[%d]\n", addr);
return ret;
}
r = iwl_read32(trans, CSR_EEPROM_REG);
/* check for ECC errors: */
otpgp = iwl_read32(trans, CSR_OTP_GP_REG);
if (otpgp & CSR_OTP_GP_REG_ECC_UNCORR_STATUS_MSK) {
/* stop in this case */
/* set the uncorrectable OTP ECC bit for acknowledgement */
iwl_set_bit(trans, CSR_OTP_GP_REG,
CSR_OTP_GP_REG_ECC_UNCORR_STATUS_MSK);
IWL_ERR(trans, "Uncorrectable OTP ECC error, abort OTP read\n");
return -EINVAL;
}
if (otpgp & CSR_OTP_GP_REG_ECC_CORR_STATUS_MSK) {
/* continue in this case */
/* set the correctable OTP ECC bit for acknowledgement */
iwl_set_bit(trans, CSR_OTP_GP_REG,
CSR_OTP_GP_REG_ECC_CORR_STATUS_MSK);
IWL_ERR(trans, "Correctable OTP ECC error, continue read\n");
}
*eeprom_data = cpu_to_le16(r >> 16);
return 0;
}
/*
* iwl_is_otp_empty: check for empty OTP
*/
static bool iwl_is_otp_empty(struct iwl_trans *trans)
{
u16 next_link_addr = 0;
__le16 link_value;
bool is_empty = false;
/* locate the beginning of OTP link list */
if (!iwl_read_otp_word(trans, next_link_addr, &link_value)) {
if (!link_value) {
IWL_ERR(trans, "OTP is empty\n");
is_empty = true;
}
} else {
IWL_ERR(trans, "Unable to read first block of OTP list.\n");
is_empty = true;
}
return is_empty;
}
/*
* iwl_find_otp_image: find EEPROM image in OTP
* finding the OTP block that contains the EEPROM image.
* the last valid block on the link list (the block _before_ the last block)
* is the block we should read and used to configure the device.
* If all the available OTP blocks are full, the last block will be the block
* we should read and used to configure the device.
* only perform this operation if shadow RAM is disabled
*/
static int iwl_find_otp_image(struct iwl_trans *trans,
u16 *validblockaddr)
{
u16 next_link_addr = 0, valid_addr;
__le16 link_value = 0;
int usedblocks = 0;
/* set addressing mode to absolute to traverse the link list */
iwl_set_otp_access(trans, IWL_OTP_ACCESS_ABSOLUTE);
/* checking for empty OTP or error */
if (iwl_is_otp_empty(trans))
return -EINVAL;
/*
* start traverse link list
* until reach the max number of OTP blocks
* different devices have different number of OTP blocks
*/
do {
/* save current valid block address
* check for more block on the link list
*/
valid_addr = next_link_addr;
next_link_addr = le16_to_cpu(link_value) * sizeof(u16);
IWL_DEBUG_EEPROM(trans, "OTP blocks %d addr 0x%x\n",
usedblocks, next_link_addr);
if (iwl_read_otp_word(trans, next_link_addr, &link_value))
return -EINVAL;
if (!link_value) {
/*
* reach the end of link list, return success and
* set address point to the starting address
* of the image
*/
*validblockaddr = valid_addr;
/* skip first 2 bytes (link list pointer) */
*validblockaddr += 2;
return 0;
}
/* more in the link list, continue */
usedblocks++;
} while (usedblocks <= trans->cfg->base_params->max_ll_items);
/* OTP has no valid blocks */
IWL_DEBUG_EEPROM(trans, "OTP has no valid blocks\n");
return -EINVAL;
}
/******************************************************************************
*
* Tx Power related functions
*
******************************************************************************/
/**
* iwl_get_max_txpower_avg - get the highest tx power from all chains.
* find the highest tx power from all chains for the channel
*/
static s8 iwl_get_max_txpower_avg(const struct iwl_cfg *cfg,
struct iwl_eeprom_enhanced_txpwr *enhanced_txpower,
int element, s8 *max_txpower_in_half_dbm)
{
s8 max_txpower_avg = 0; /* (dBm) */
/* Take the highest tx power from any valid chains */
if ((cfg->valid_tx_ant & ANT_A) &&
(enhanced_txpower[element].chain_a_max > max_txpower_avg))
max_txpower_avg = enhanced_txpower[element].chain_a_max;
if ((cfg->valid_tx_ant & ANT_B) &&
(enhanced_txpower[element].chain_b_max > max_txpower_avg))
max_txpower_avg = enhanced_txpower[element].chain_b_max;
if ((cfg->valid_tx_ant & ANT_C) &&
(enhanced_txpower[element].chain_c_max > max_txpower_avg))
max_txpower_avg = enhanced_txpower[element].chain_c_max;
if (((cfg->valid_tx_ant == ANT_AB) |
(cfg->valid_tx_ant == ANT_BC) |
(cfg->valid_tx_ant == ANT_AC)) &&
(enhanced_txpower[element].mimo2_max > max_txpower_avg))
max_txpower_avg = enhanced_txpower[element].mimo2_max;
if ((cfg->valid_tx_ant == ANT_ABC) &&
(enhanced_txpower[element].mimo3_max > max_txpower_avg))
max_txpower_avg = enhanced_txpower[element].mimo3_max;
/*
* max. tx power in EEPROM is in 1/2 dBm format
* convert from 1/2 dBm to dBm (round-up convert)
* but we also do not want to loss 1/2 dBm resolution which
* will impact performance
*/
*max_txpower_in_half_dbm = max_txpower_avg;
return (max_txpower_avg & 0x01) + (max_txpower_avg >> 1);
}
static void
iwl_eeprom_enh_txp_read_element(struct iwl_priv *priv,
struct iwl_eeprom_enhanced_txpwr *txp,
s8 max_txpower_avg)
{
int ch_idx;
bool is_ht40 = txp->flags & IWL_EEPROM_ENH_TXP_FL_40MHZ;
enum ieee80211_band band;
band = txp->flags & IWL_EEPROM_ENH_TXP_FL_BAND_52G ?
IEEE80211_BAND_5GHZ : IEEE80211_BAND_2GHZ;
for (ch_idx = 0; ch_idx < priv->channel_count; ch_idx++) {
struct iwl_channel_info *ch_info = &priv->channel_info[ch_idx];
/* update matching channel or from common data only */
if (txp->channel != 0 && ch_info->channel != txp->channel)
continue;
/* update matching band only */
if (band != ch_info->band)
continue;
if (ch_info->max_power_avg < max_txpower_avg && !is_ht40) {
ch_info->max_power_avg = max_txpower_avg;
ch_info->curr_txpow = max_txpower_avg;
ch_info->scan_power = max_txpower_avg;
}
if (is_ht40 && ch_info->ht40_max_power_avg < max_txpower_avg)
ch_info->ht40_max_power_avg = max_txpower_avg;
}
}
#define EEPROM_TXP_OFFS (0x00 | INDIRECT_ADDRESS | INDIRECT_TXP_LIMIT)
#define EEPROM_TXP_ENTRY_LEN sizeof(struct iwl_eeprom_enhanced_txpwr)
#define EEPROM_TXP_SZ_OFFS (0x00 | INDIRECT_ADDRESS | INDIRECT_TXP_LIMIT_SIZE)
#define TXP_CHECK_AND_PRINT(x) ((txp->flags & IWL_EEPROM_ENH_TXP_FL_##x) \
? # x " " : "")
static void iwl_eeprom_enhanced_txpower(struct iwl_priv *priv)
{
struct iwl_eeprom_enhanced_txpwr *txp_array, *txp;
int idx, entries;
__le16 *txp_len;
s8 max_txp_avg, max_txp_avg_halfdbm;
BUILD_BUG_ON(sizeof(struct iwl_eeprom_enhanced_txpwr) != 8);
/* the length is in 16-bit words, but we want entries */
txp_len = (__le16 *) iwl_eeprom_query_addr(priv, EEPROM_TXP_SZ_OFFS);
entries = le16_to_cpup(txp_len) * 2 / EEPROM_TXP_ENTRY_LEN;
txp_array = (void *) iwl_eeprom_query_addr(priv, EEPROM_TXP_OFFS);
for (idx = 0; idx < entries; idx++) {
txp = &txp_array[idx];
/* skip invalid entries */
if (!(txp->flags & IWL_EEPROM_ENH_TXP_FL_VALID))
continue;
IWL_DEBUG_EEPROM(priv, "%s %d:\t %s%s%s%s%s%s%s%s (0x%02x)\n",
(txp->channel && (txp->flags &
IWL_EEPROM_ENH_TXP_FL_COMMON_TYPE)) ?
"Common " : (txp->channel) ?
"Channel" : "Common",
(txp->channel),
TXP_CHECK_AND_PRINT(VALID),
TXP_CHECK_AND_PRINT(BAND_52G),
TXP_CHECK_AND_PRINT(OFDM),
TXP_CHECK_AND_PRINT(40MHZ),
TXP_CHECK_AND_PRINT(HT_AP),
TXP_CHECK_AND_PRINT(RES1),
TXP_CHECK_AND_PRINT(RES2),
TXP_CHECK_AND_PRINT(COMMON_TYPE),
txp->flags);
IWL_DEBUG_EEPROM(priv, "\t\t chain_A: 0x%02x "
"chain_B: 0X%02x chain_C: 0X%02x\n",
txp->chain_a_max, txp->chain_b_max,
txp->chain_c_max);
IWL_DEBUG_EEPROM(priv, "\t\t MIMO2: 0x%02x "
"MIMO3: 0x%02x High 20_on_40: 0x%02x "
"Low 20_on_40: 0x%02x\n",
txp->mimo2_max, txp->mimo3_max,
((txp->delta_20_in_40 & 0xf0) >> 4),
(txp->delta_20_in_40 & 0x0f));
max_txp_avg = iwl_get_max_txpower_avg(priv->cfg, txp_array, idx,
&max_txp_avg_halfdbm);
/*
* Update the user limit values values to the highest
* power supported by any channel
*/
if (max_txp_avg > priv->tx_power_user_lmt)
priv->tx_power_user_lmt = max_txp_avg;
if (max_txp_avg_halfdbm > priv->tx_power_lmt_in_half_dbm)
priv->tx_power_lmt_in_half_dbm = max_txp_avg_halfdbm;
iwl_eeprom_enh_txp_read_element(priv, txp, max_txp_avg);
}
}
/**
* iwl_eeprom_init - read EEPROM contents
*
* Load the EEPROM contents from adapter into priv->eeprom
*
* NOTE: This routine uses the non-debug IO access functions.
*/
int iwl_eeprom_init(struct iwl_priv *priv, u32 hw_rev)
{
__le16 *e;
u32 gp = iwl_read32(priv->trans, CSR_EEPROM_GP);
int sz;
int ret;
u16 addr;
u16 validblockaddr = 0;
u16 cache_addr = 0;
priv->nvm_device_type = iwl_get_nvm_type(priv->trans, hw_rev);
if (priv->nvm_device_type == -ENOENT)
return -ENOENT;
/* allocate eeprom */
sz = priv->cfg->base_params->eeprom_size;
IWL_DEBUG_EEPROM(priv, "NVM size = %d\n", sz);
priv->eeprom = kzalloc(sz, GFP_KERNEL);
if (!priv->eeprom) {
ret = -ENOMEM;
goto alloc_err;
}
e = (__le16 *)priv->eeprom;
ret = iwl_eeprom_verify_signature(priv);
if (ret < 0) {
IWL_ERR(priv, "EEPROM not found, EEPROM_GP=0x%08x\n", gp);
ret = -ENOENT;
goto err;
}
/* Make sure driver (instead of uCode) is allowed to read EEPROM */
ret = iwl_eeprom_acquire_semaphore(priv->trans);
if (ret < 0) {
IWL_ERR(priv, "Failed to acquire EEPROM semaphore.\n");
ret = -ENOENT;
goto err;
}
if (priv->nvm_device_type == NVM_DEVICE_TYPE_OTP) {
ret = iwl_init_otp_access(priv->trans);
if (ret) {
IWL_ERR(priv, "Failed to initialize OTP access.\n");
ret = -ENOENT;
goto done;
}
iwl_write32(priv->trans, CSR_EEPROM_GP,
iwl_read32(priv->trans, CSR_EEPROM_GP) &
~CSR_EEPROM_GP_IF_OWNER_MSK);
iwl_set_bit(priv->trans, CSR_OTP_GP_REG,
CSR_OTP_GP_REG_ECC_CORR_STATUS_MSK |
CSR_OTP_GP_REG_ECC_UNCORR_STATUS_MSK);
/* traversing the linked list if no shadow ram supported */
if (!priv->cfg->base_params->shadow_ram_support) {
if (iwl_find_otp_image(priv->trans, &validblockaddr)) {
ret = -ENOENT;
goto done;
}
}
for (addr = validblockaddr; addr < validblockaddr + sz;
addr += sizeof(u16)) {
__le16 eeprom_data;
ret = iwl_read_otp_word(priv->trans, addr,
&eeprom_data);
if (ret)
goto done;
e[cache_addr / 2] = eeprom_data;
cache_addr += sizeof(u16);
}
} else {
/* eeprom is an array of 16bit values */
for (addr = 0; addr < sz; addr += sizeof(u16)) {
u32 r;
iwl_write32(priv->trans, CSR_EEPROM_REG,
CSR_EEPROM_REG_MSK_ADDR & (addr << 1));
ret = iwl_poll_bit(priv->trans, CSR_EEPROM_REG,
CSR_EEPROM_REG_READ_VALID_MSK,
CSR_EEPROM_REG_READ_VALID_MSK,
IWL_EEPROM_ACCESS_TIMEOUT);
if (ret < 0) {
IWL_ERR(priv,
"Time out reading EEPROM[%d]\n", addr);
goto done;
}
r = iwl_read32(priv->trans, CSR_EEPROM_REG);
e[addr / 2] = cpu_to_le16(r >> 16);
}
}
IWL_DEBUG_EEPROM(priv, "NVM Type: %s, version: 0x%x\n",
(priv->nvm_device_type == NVM_DEVICE_TYPE_OTP)
? "OTP" : "EEPROM",
iwl_eeprom_query16(priv, EEPROM_VERSION));
ret = 0;
done:
iwl_eeprom_release_semaphore(priv->trans);
err:
if (ret)
iwl_eeprom_free(priv);
alloc_err:
return ret;
}
void iwl_eeprom_free(struct iwl_priv *priv)
{
kfree(priv->eeprom);
priv->eeprom = NULL;
}
static void iwl_init_band_reference(struct iwl_priv *priv,
int eep_band, int *eeprom_ch_count,
const struct iwl_eeprom_channel **eeprom_ch_info,
const u8 **eeprom_ch_index)
{
u32 offset = priv->lib->
eeprom_ops.regulatory_bands[eep_band - 1];
switch (eep_band) {
case 1: /* 2.4GHz band */
*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1);
*eeprom_ch_info = (struct iwl_eeprom_channel *)
iwl_eeprom_query_addr(priv, offset);
*eeprom_ch_index = iwl_eeprom_band_1;
break;
case 2: /* 4.9GHz band */
*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2);
*eeprom_ch_info = (struct iwl_eeprom_channel *)
iwl_eeprom_query_addr(priv, offset);
*eeprom_ch_index = iwl_eeprom_band_2;
break;
case 3: /* 5.2GHz band */
*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3);
*eeprom_ch_info = (struct iwl_eeprom_channel *)
iwl_eeprom_query_addr(priv, offset);
*eeprom_ch_index = iwl_eeprom_band_3;
break;
case 4: /* 5.5GHz band */
*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4);
*eeprom_ch_info = (struct iwl_eeprom_channel *)
iwl_eeprom_query_addr(priv, offset);
*eeprom_ch_index = iwl_eeprom_band_4;
break;
case 5: /* 5.7GHz band */
*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5);
*eeprom_ch_info = (struct iwl_eeprom_channel *)
iwl_eeprom_query_addr(priv, offset);
*eeprom_ch_index = iwl_eeprom_band_5;
break;
case 6: /* 2.4GHz ht40 channels */
*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_6);
*eeprom_ch_info = (struct iwl_eeprom_channel *)
iwl_eeprom_query_addr(priv, offset);
*eeprom_ch_index = iwl_eeprom_band_6;
break;
case 7: /* 5 GHz ht40 channels */
*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_7);
*eeprom_ch_info = (struct iwl_eeprom_channel *)
iwl_eeprom_query_addr(priv, offset);
*eeprom_ch_index = iwl_eeprom_band_7;
break;
default:
BUG();
return;
}
}
#define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
? # x " " : "")
/**
* iwl_mod_ht40_chan_info - Copy ht40 channel info into driver's priv.
*
* Does not set up a command, or touch hardware.
*/
static int iwl_mod_ht40_chan_info(struct iwl_priv *priv,
enum ieee80211_band band, u16 channel,
const struct iwl_eeprom_channel *eeprom_ch,
u8 clear_ht40_extension_channel)
{
struct iwl_channel_info *ch_info;
ch_info = (struct iwl_channel_info *)
iwl_get_channel_info(priv, band, channel);
if (!is_channel_valid(ch_info))
return -1;
IWL_DEBUG_EEPROM(priv, "HT40 Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):"
" Ad-Hoc %ssupported\n",
ch_info->channel,
is_channel_a_band(ch_info) ?
"5.2" : "2.4",
CHECK_AND_PRINT(IBSS),
CHECK_AND_PRINT(ACTIVE),
CHECK_AND_PRINT(RADAR),
CHECK_AND_PRINT(WIDE),
CHECK_AND_PRINT(DFS),
eeprom_ch->flags,
eeprom_ch->max_power_avg,
((eeprom_ch->flags & EEPROM_CHANNEL_IBSS)
&& !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ?
"" : "not ");
ch_info->ht40_eeprom = *eeprom_ch;
ch_info->ht40_max_power_avg = eeprom_ch->max_power_avg;
ch_info->ht40_flags = eeprom_ch->flags;
if (eeprom_ch->flags & EEPROM_CHANNEL_VALID)
ch_info->ht40_extension_channel &= ~clear_ht40_extension_channel;
return 0;
}
#define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
? # x " " : "")
/**
* iwl_init_channel_map - Set up driver's info for all possible channels
*/
int iwl_init_channel_map(struct iwl_priv *priv)
{
int eeprom_ch_count = 0;
const u8 *eeprom_ch_index = NULL;
const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
int band, ch;
struct iwl_channel_info *ch_info;
if (priv->channel_count) {
IWL_DEBUG_EEPROM(priv, "Channel map already initialized.\n");
return 0;
}
IWL_DEBUG_EEPROM(priv, "Initializing regulatory info from EEPROM\n");
priv->channel_count =
ARRAY_SIZE(iwl_eeprom_band_1) +
ARRAY_SIZE(iwl_eeprom_band_2) +
ARRAY_SIZE(iwl_eeprom_band_3) +
ARRAY_SIZE(iwl_eeprom_band_4) +
ARRAY_SIZE(iwl_eeprom_band_5);
IWL_DEBUG_EEPROM(priv, "Parsing data for %d channels.\n",
priv->channel_count);
priv->channel_info = kcalloc(priv->channel_count,
sizeof(struct iwl_channel_info),
GFP_KERNEL);
if (!priv->channel_info) {
IWL_ERR(priv, "Could not allocate channel_info\n");
priv->channel_count = 0;
return -ENOMEM;
}
ch_info = priv->channel_info;
/* Loop through the 5 EEPROM bands adding them in order to the
* channel map we maintain (that contains additional information than
* what just in the EEPROM) */
for (band = 1; band <= 5; band++) {
iwl_init_band_reference(priv, band, &eeprom_ch_count,
&eeprom_ch_info, &eeprom_ch_index);
/* Loop through each band adding each of the channels */
for (ch = 0; ch < eeprom_ch_count; ch++) {
ch_info->channel = eeprom_ch_index[ch];
ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
IEEE80211_BAND_5GHZ;
/* permanently store EEPROM's channel regulatory flags
* and max power in channel info database. */
ch_info->eeprom = eeprom_ch_info[ch];
/* Copy the run-time flags so they are there even on
* invalid channels */
ch_info->flags = eeprom_ch_info[ch].flags;
/* First write that ht40 is not enabled, and then enable
* one by one */
ch_info->ht40_extension_channel =
IEEE80211_CHAN_NO_HT40;
if (!(is_channel_valid(ch_info))) {
IWL_DEBUG_EEPROM(priv,
"Ch. %d Flags %x [%sGHz] - "
"No traffic\n",
ch_info->channel,
ch_info->flags,
is_channel_a_band(ch_info) ?
"5.2" : "2.4");
ch_info++;
continue;
}
/* Initialize regulatory-based run-time data */
ch_info->max_power_avg = ch_info->curr_txpow =
eeprom_ch_info[ch].max_power_avg;
ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
ch_info->min_power = 0;
IWL_DEBUG_EEPROM(priv, "Ch. %d [%sGHz] "
"%s%s%s%s%s%s(0x%02x %ddBm):"
" Ad-Hoc %ssupported\n",
ch_info->channel,
is_channel_a_band(ch_info) ?
"5.2" : "2.4",
CHECK_AND_PRINT_I(VALID),
CHECK_AND_PRINT_I(IBSS),
CHECK_AND_PRINT_I(ACTIVE),
CHECK_AND_PRINT_I(RADAR),
CHECK_AND_PRINT_I(WIDE),
CHECK_AND_PRINT_I(DFS),
eeprom_ch_info[ch].flags,
eeprom_ch_info[ch].max_power_avg,
((eeprom_ch_info[ch].
flags & EEPROM_CHANNEL_IBSS)
&& !(eeprom_ch_info[ch].
flags & EEPROM_CHANNEL_RADAR))
? "" : "not ");
ch_info++;
}
}
/* Check if we do have HT40 channels */
if (priv->lib->eeprom_ops.regulatory_bands[5] ==
EEPROM_REGULATORY_BAND_NO_HT40 &&
priv->lib->eeprom_ops.regulatory_bands[6] ==
EEPROM_REGULATORY_BAND_NO_HT40)
return 0;
/* Two additional EEPROM bands for 2.4 and 5 GHz HT40 channels */
for (band = 6; band <= 7; band++) {
enum ieee80211_band ieeeband;
iwl_init_band_reference(priv, band, &eeprom_ch_count,
&eeprom_ch_info, &eeprom_ch_index);
/* EEPROM band 6 is 2.4, band 7 is 5 GHz */
ieeeband =
(band == 6) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
/* Loop through each band adding each of the channels */
for (ch = 0; ch < eeprom_ch_count; ch++) {
/* Set up driver's info for lower half */
iwl_mod_ht40_chan_info(priv, ieeeband,
eeprom_ch_index[ch],
&eeprom_ch_info[ch],
IEEE80211_CHAN_NO_HT40PLUS);
/* Set up driver's info for upper half */
iwl_mod_ht40_chan_info(priv, ieeeband,
eeprom_ch_index[ch] + 4,
&eeprom_ch_info[ch],
IEEE80211_CHAN_NO_HT40MINUS);
}
}
/* for newer device (6000 series and up)
* EEPROM contain enhanced tx power information
* driver need to process addition information
* to determine the max channel tx power limits
*/
if (priv->lib->eeprom_ops.enhanced_txpower)
iwl_eeprom_enhanced_txpower(priv);
return 0;
}
/*
* iwl_free_channel_map - undo allocations in iwl_init_channel_map
*/
void iwl_free_channel_map(struct iwl_priv *priv)
{
kfree(priv->channel_info);
priv->channel_count = 0;
}
/**
* iwl_get_channel_info - Find driver's private channel info
*
* Based on band and channel number.
*/
const struct iwl_channel_info *iwl_get_channel_info(const struct iwl_priv *priv,
enum ieee80211_band band, u16 channel)
{
int i;
switch (band) {
case IEEE80211_BAND_5GHZ:
for (i = 14; i < priv->channel_count; i++) {
if (priv->channel_info[i].channel == channel)
return &priv->channel_info[i];
}
break;
case IEEE80211_BAND_2GHZ:
if (channel >= 1 && channel <= 14)
return &priv->channel_info[channel - 1];
break;
default:
BUG();
}
return NULL;
}
void iwl_rf_config(struct iwl_priv *priv)
{
u16 radio_cfg;
radio_cfg = iwl_eeprom_query16(priv, EEPROM_RADIO_CONFIG);
/* write radio config values to register */
if (EEPROM_RF_CFG_TYPE_MSK(radio_cfg) <= EEPROM_RF_CONFIG_TYPE_MAX) {
iwl_set_bit(priv->trans, CSR_HW_IF_CONFIG_REG,
EEPROM_RF_CFG_TYPE_MSK(radio_cfg) |
EEPROM_RF_CFG_STEP_MSK(radio_cfg) |
EEPROM_RF_CFG_DASH_MSK(radio_cfg));
IWL_INFO(priv, "Radio type=0x%x-0x%x-0x%x\n",
EEPROM_RF_CFG_TYPE_MSK(radio_cfg),
EEPROM_RF_CFG_STEP_MSK(radio_cfg),
EEPROM_RF_CFG_DASH_MSK(radio_cfg));
} else
WARN_ON(1);
/* set CSR_HW_CONFIG_REG for uCode use */
iwl_set_bit(priv->trans, CSR_HW_IF_CONFIG_REG,
CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
}
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