/*
* PHY functions
*
* Copyright (c) 2004-2007 Reyk Floeter <reyk@openbsd.org>
* Copyright (c) 2006-2009 Nick Kossifidis <mickflemm@gmail.com>
* Copyright (c) 2007-2008 Jiri Slaby <jirislaby@gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#define _ATH5K_PHY
#include <linux/delay.h>
#include "ath5k.h"
#include "reg.h"
#include "base.h"
#include "rfbuffer.h"
#include "rfgain.h"
/*
* Used to modify RF Banks before writing them to AR5K_RF_BUFFER
*/
static unsigned int ath5k_hw_rfregs_op(u32 *rf, u32 offset, u32 reg, u32 bits,
u32 first, u32 col, bool set)
{
u32 mask, entry, last, data, shift, position;
s32 left;
int i;
data = 0;
if (rf == NULL)
/* should not happen */
return 0;
if (!(col <= 3 && bits <= 32 && first + bits <= 319)) {
ATH5K_PRINTF("invalid values at offset %u\n", offset);
return 0;
}
entry = ((first - 1) / 8) + offset;
position = (first - 1) % 8;
if (set)
data = ath5k_hw_bitswap(reg, bits);
for (i = shift = 0, left = bits; left > 0; position = 0, entry++, i++) {
last = (position + left > 8) ? 8 : position + left;
mask = (((1 << last) - 1) ^ ((1 << position) - 1)) << (col * 8);
if (set) {
rf[entry] &= ~mask;
rf[entry] |= ((data << position) << (col * 8)) & mask;
data >>= (8 - position);
} else {
data = (((rf[entry] & mask) >> (col * 8)) >> position)
<< shift;
shift += last - position;
}
left -= 8 - position;
}
data = set ? 1 : ath5k_hw_bitswap(data, bits);
return data;
}
static u32 ath5k_hw_rfregs_gainf_corr(struct ath5k_hw *ah)
{
u32 mix, step;
u32 *rf;
if (ah->ah_rf_banks == NULL)
return 0;
rf = ah->ah_rf_banks;
ah->ah_gain.g_f_corr = 0;
if (ath5k_hw_rfregs_op(rf, ah->ah_offset[7], 0, 1, 36, 0, false) != 1)
return 0;
step = ath5k_hw_rfregs_op(rf, ah->ah_offset[7], 0, 4, 32, 0, false);
mix = ah->ah_gain.g_step->gos_param[0];
switch (mix) {
case 3:
ah->ah_gain.g_f_corr = step * 2;
break;
case 2:
ah->ah_gain.g_f_corr = (step - 5) * 2;
break;
case 1:
ah->ah_gain.g_f_corr = step;
break;
default:
ah->ah_gain.g_f_corr = 0;
break;
}
return ah->ah_gain.g_f_corr;
}
static bool ath5k_hw_rfregs_gain_readback(struct ath5k_hw *ah)
{
u32 step, mix, level[4];
u32 *rf;
if (ah->ah_rf_banks == NULL)
return false;
rf = ah->ah_rf_banks;
if (ah->ah_radio == AR5K_RF5111) {
step = ath5k_hw_rfregs_op(rf, ah->ah_offset[7], 0, 6, 37, 0,
false);
level[0] = 0;
level[1] = (step == 0x3f) ? 0x32 : step + 4;
level[2] = (step != 0x3f) ? 0x40 : level[0];
level[3] = level[2] + 0x32;
ah->ah_gain.g_high = level[3] -
(step == 0x3f ? AR5K_GAIN_DYN_ADJUST_HI_MARGIN : -5);
ah->ah_gain.g_low = level[0] +
(step == 0x3f ? AR5K_GAIN_DYN_ADJUST_LO_MARGIN : 0);
} else {
mix = ath5k_hw_rfregs_op(rf, ah->ah_offset[7], 0, 1, 36, 0,
false);
level[0] = level[2] = 0;
if (mix == 1) {
level[1] = level[3] = 83;
} else {
level[1] = level[3] = 107;
ah->ah_gain.g_high = 55;
}
}
return (ah->ah_gain.g_current >= level[0] &&
ah->ah_gain.g_current <= level[1]) ||
(ah->ah_gain.g_current >= level[2] &&
ah->ah_gain.g_current <= level[3]);
}
static s32 ath5k_hw_rfregs_gain_adjust(struct ath5k_hw *ah)
{
const struct ath5k_gain_opt *go;
int ret = 0;
switch (ah->ah_radio) {
case AR5K_RF5111:
go = &rfgain_opt_5111;
break;
case AR5K_RF5112:
go = &rfgain_opt_5112;
break;
default:
return 0;
}
ah->ah_gain.g_step = &go->go_step[ah->ah_gain.g_step_idx];
if (ah->ah_gain.g_current >= ah->ah_gain.g_high) {
if (ah->ah_gain.g_step_idx == 0)
return -1;
for (ah->ah_gain.g_target = ah->ah_gain.g_current;
ah->ah_gain.g_target >= ah->ah_gain.g_high &&
ah->ah_gain.g_step_idx > 0;
ah->ah_gain.g_step =
&go->go_step[ah->ah_gain.g_step_idx])
ah->ah_gain.g_target -= 2 *
(go->go_step[--(ah->ah_gain.g_step_idx)].gos_gain -
ah->ah_gain.g_step->gos_gain);
ret = 1;
goto done;
}
if (ah->ah_gain.g_current <= ah->ah_gain.g_low) {
if (ah->ah_gain.g_step_idx == (go->go_steps_count - 1))
return -2;
for (ah->ah_gain.g_target = ah->ah_gain.g_current;
ah->ah_gain.g_target <= ah->ah_gain.g_low &&
ah->ah_gain.g_step_idx < go->go_steps_count-1;
ah->ah_gain.g_step =
&go->go_step[ah->ah_gain.g_step_idx])
ah->ah_gain.g_target -= 2 *
(go->go_step[++ah->ah_gain.g_step_idx].gos_gain -
ah->ah_gain.g_step->gos_gain);
ret = 2;
goto done;
}
done:
ATH5K_DBG(ah->ah_sc, ATH5K_DEBUG_CALIBRATE,
"ret %d, gain step %u, current gain %u, target gain %u\n",
ret, ah->ah_gain.g_step_idx, ah->ah_gain.g_current,
ah->ah_gain.g_target);
return ret;
}
/*
* Read EEPROM Calibration data, modify RF Banks and Initialize RF5111
*/
static int ath5k_hw_rf5111_rfregs(struct ath5k_hw *ah,
struct ieee80211_channel *channel, unsigned int mode)
{
struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
u32 *rf;
const unsigned int rf_size = ARRAY_SIZE(rfb_5111);
unsigned int i;
int obdb = -1, bank = -1;
u32 ee_mode;
AR5K_ASSERT_ENTRY(mode, AR5K_MODE_MAX);
rf = ah->ah_rf_banks;
/* Copy values to modify them */
for (i = 0; i < rf_size; i++) {
if (rfb_5111[i].rfb_bank >= AR5K_RF5111_INI_RF_MAX_BANKS) {
ATH5K_ERR(ah->ah_sc, "invalid bank\n");
return -EINVAL;
}
if (bank != rfb_5111[i].rfb_bank) {
bank = rfb_5111[i].rfb_bank;
ah->ah_offset[bank] = i;
}
rf[i] = rfb_5111[i].rfb_mode_data[mode];
}
/* Modify bank 0 */
if (channel->hw_value & CHANNEL_2GHZ) {
if (channel->hw_value & CHANNEL_CCK)
ee_mode = AR5K_EEPROM_MODE_11B;
else
ee_mode = AR5K_EEPROM_MODE_11G;
obdb = 0;
if (!ath5k_hw_rfregs_op(rf, ah->ah_offset[0],
ee->ee_ob[ee_mode][obdb], 3, 119, 0, true))
return -EINVAL;
if (!ath5k_hw_rfregs_op(rf, ah->ah_offset[0],
ee->ee_ob[ee_mode][obdb], 3, 122, 0, true))
return -EINVAL;
obdb = 1;
/* Modify bank 6 */
} else {
/* For 11a, Turbo and XR */
ee_mode = AR5K_EEPROM_MODE_11A;
obdb = channel->center_freq >= 5725 ? 3 :
(channel->center_freq >= 5500 ? 2 :
(channel->center_freq >= 5260 ? 1 :
(channel->center_freq > 4000 ? 0 : -1)));
if (!ath5k_hw_rfregs_op(rf, ah->ah_offset[6],
ee->ee_pwd_84, 1, 51, 3, true))
return -EINVAL;
if (!ath5k_hw_rfregs_op(rf, ah->ah_offset[6],
ee->ee_pwd_90, 1, 45, 3, true))
return -EINVAL;
}
if (!ath5k_hw_rfregs_op(rf, ah->ah_offset[6],
!ee->ee_xpd[ee_mode], 1, 95, 0, true))
return -EINVAL;
if (!ath5k_hw_rfregs_op(rf, ah->ah_offset[6],
ee->ee_x_gain[ee_mode], 4, 96, 0, true))
return -EINVAL;
if (!ath5k_hw_rfregs_op(rf, ah->ah_offset[6], obdb >= 0 ?
ee->ee_ob[ee_mode][obdb] : 0, 3, 104, 0, true))
return -EINVAL;
if (!ath5k_hw_rfregs_op(rf, ah->ah_offset[6], obdb >= 0 ?
ee->ee_db[ee_mode][obdb] : 0, 3, 107, 0, true))
return -EINVAL;
/* Modify bank 7 */
if (!ath5k_hw_rfregs_op(rf, ah->ah_offset[7],
ee->ee_i_gain[ee_mode], 6, 29, 0, true))
return -EINVAL;
if (!ath5k_hw_rfregs_op(rf, ah->ah_offset[7],
ee->ee_xpd[ee_mode], 1, 4, 0, true))
return -EINVAL;
/* Write RF values */
for (i = 0; i < rf_size; i++) {
AR5K_REG_WAIT(i);
ath5k_hw_reg_write(ah, rf[i], rfb_5111[i].rfb_ctrl_register);
}
return 0;
}
/*
* Read EEPROM Calibration data, modify RF Banks and Initialize RF5112
*/
static int ath5k_hw_rf5112_rfregs(struct ath5k_hw *ah,
struct ieee80211_channel *channel, unsigned int mode)
{
const struct ath5k_ini_rfbuffer *rf_ini;
struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
u32 *rf;
unsigned int rf_size, i;
int obdb = -1, bank = -1;
u32 ee_mode;
AR5K_ASSERT_ENTRY(mode, AR5K_MODE_MAX);
rf = ah->ah_rf_banks;
if (ah->ah_radio_5ghz_revision >= AR5K_SREV_RAD_5112A) {
rf_ini = rfb_5112a;
rf_size = ARRAY_SIZE(rfb_5112a);
} else {
rf_ini = rfb_5112;
rf_size = ARRAY_SIZE(rfb_5112);
}
/* Copy values to modify them */
for (i = 0; i < rf_size; i++) {
if (rf_ini[i].rfb_bank >= AR5K_RF5112_INI_RF_MAX_BANKS) {
ATH5K_ERR(ah->ah_sc, "invalid bank\n");
return -EINVAL;
}
if (bank != rf_ini[i].rfb_bank) {
bank = rf_ini[i].rfb_bank;
ah->ah_offset[bank] = i;
}
rf[i] = rf_ini[i].rfb_mode_data[mode];
}
/* Modify bank 6 */
if (channel->hw_value & CHANNEL_2GHZ) {
if (channel->hw_value & CHANNEL_OFDM)
ee_mode = AR5K_EEPROM_MODE_11G;
else
ee_mode = AR5K_EEPROM_MODE_11B;
obdb = 0;
if (!ath5k_hw_rfregs_op(rf, ah->ah_offset[6],
ee->ee_ob[ee_mode][obdb], 3, 287, 0, true))
return -EINVAL;
if (!ath5k_hw_rfregs_op(rf, ah->ah_offset[6],
ee->ee_ob[ee_mode][obdb], 3, 290, 0, true))
return -EINVAL;
} else {
/* For 11a, Turbo and XR */
ee_mode = AR5K_EEPROM_MODE_11A;
obdb = channel->center_freq >= 5725 ? 3 :
(channel->center_freq >= 5500 ? 2 :
(channel->center_freq >= 5260 ? 1 :
(channel->center_freq > 4000 ? 0 : -1)));
if (obdb == -1)
return -EINVAL;
if (!ath5k_hw_rfregs_op(rf, ah->ah_offset[6],
ee->ee_ob[ee_mode][obdb], 3, 279, 0, true))
return -EINVAL;
if (!ath5k_hw_rfregs_op(rf, ah->ah_offset[6],
ee->ee_ob[ee_mode][obdb], 3, 282, 0, true))
return -EINVAL;
}
ath5k_hw_rfregs_op(rf, ah->ah_offset[6],
ee->ee_x_gain[ee_mode], 2, 270, 0, true);
ath5k_hw_rfregs_op(rf, ah->ah_offset[6],
ee->ee_x_gain[ee_mode], 2, 257, 0, true);
if (!ath5k_hw_rfregs_op(rf, ah->ah_offset[6],
ee->ee_xpd[ee_mode], 1, 302, 0, true))
return -EINVAL;
/* Modify bank 7 */
if (!ath5k_hw_rfregs_op(rf, ah->ah_offset[7],
ee->ee_i_gain[ee_mode], 6, 14, 0, true))
return -EINVAL;
/* Write RF values */
for (i = 0; i < rf_size; i++)
ath5k_hw_reg_write(ah, rf[i], rf_ini[i].rfb_ctrl_register);
return 0;
}
/*
* Initialize RF5413/5414 and future chips
* (until we come up with a better solution)
*/
static int ath5k_hw_rf5413_rfregs(struct ath5k_hw *ah,
struct ieee80211_channel *channel, unsigned int mode)
{
const struct ath5k_ini_rfbuffer *rf_ini;
u32 *rf;
unsigned int rf_size, i;
int bank = -1;
AR5K_ASSERT_ENTRY(mode, AR5K_MODE_MAX);
rf = ah->ah_rf_banks;
switch (ah->ah_radio) {
case AR5K_RF5413:
rf_ini = rfb_5413;
rf_size = ARRAY_SIZE(rfb_5413);
break;
case AR5K_RF2413:
rf_ini = rfb_2413;
rf_size = ARRAY_SIZE(rfb_2413);
if (mode < 2) {
ATH5K_ERR(ah->ah_sc,
"invalid channel mode: %i\n", mode);
return -EINVAL;
}
break;
case AR5K_RF2425:
rf_ini = rfb_2425;
rf_size = ARRAY_SIZE(rfb_2425);
if (mode < 2) {
ATH5K_ERR(ah->ah_sc,
"invalid channel mode: %i\n", mode);
return -EINVAL;
}
break;
default:
return -EINVAL;
}
/* Copy values to modify them */
for (i = 0; i < rf_size; i++) {
if (rf_ini[i].rfb_bank >= AR5K_RF5112_INI_RF_MAX_BANKS) {
ATH5K_ERR(ah->ah_sc, "invalid bank\n");
return -EINVAL;
}
if (bank != rf_ini[i].rfb_bank) {
bank = rf_ini[i].rfb_bank;
ah->ah_offset[bank] = i;
}
rf[i] = rf_ini[i].rfb_mode_data[mode];
}
/*
* After compairing dumps from different cards
* we get the same RF_BUFFER settings (diff returns
* 0 lines). It seems that RF_BUFFER settings are static
* and are written unmodified (no EEPROM stuff
* is used because calibration data would be
* different between different cards and would result
* different RF_BUFFER settings)
*/
/* Write RF values */
for (i = 0; i < rf_size; i++)
ath5k_hw_reg_write(ah, rf[i], rf_ini[i].rfb_ctrl_register);
return 0;
}
/*
* Initialize RF
*/
int ath5k_hw_rfregs(struct ath5k_hw *ah, struct ieee80211_channel *channel,
unsigned int mode)
{
int (*func)(struct ath5k_hw *, struct ieee80211_channel *, unsigned int);
int ret;
switch (ah->ah_radio) {
case AR5K_RF5111:
ah->ah_rf_banks_size = sizeof(rfb_5111);
func = ath5k_hw_rf5111_rfregs;
break;
case AR5K_RF5112:
if (ah->ah_radio_5ghz_revision >= AR5K_SREV_RAD_5112A)
ah->ah_rf_banks_size = sizeof(rfb_5112a);
else
ah->ah_rf_banks_size = sizeof(rfb_5112);
func = ath5k_hw_rf5112_rfregs;
break;
case AR5K_RF5413:
ah->ah_rf_banks_size = sizeof(rfb_5413);
func = ath5k_hw_rf5413_rfregs;
break;
case AR5K_RF2413:
ah->ah_rf_banks_size = sizeof(rfb_2413);
func = ath5k_hw_rf5413_rfregs;
break;
case AR5K_RF2425:
ah->ah_rf_banks_size = sizeof(rfb_2425);
func = ath5k_hw_rf5413_rfregs;
break;
default:
return -EINVAL;
}
if (ah->ah_rf_banks == NULL) {
/* XXX do extra checks? */
ah->ah_rf_banks = kmalloc(ah->ah_rf_banks_size, GFP_KERNEL);
if (ah->ah_rf_banks == NULL) {
ATH5K_ERR(ah->ah_sc, "out of memory\n");
return -ENOMEM;
}
}
ret = func(ah, channel, mode);
if (!ret)
ah->ah_rf_gain = AR5K_RFGAIN_INACTIVE;
return ret;
}
int ath5k_hw_rfgain(struct ath5k_hw *ah, unsigned int freq)
{
const struct ath5k_ini_rfgain *ath5k_rfg;
unsigned int i, size;
switch (ah->ah_radio) {
case AR5K_RF5111:
ath5k_rfg = rfgain_5111;
size = ARRAY_SIZE(rfgain_5111);
break;
case AR5K_RF5112:
ath5k_rfg = rfgain_5112;
size = ARRAY_SIZE(rfgain_5112);
break;
case AR5K_RF5413:
ath5k_rfg = rfgain_5413;
size = ARRAY_SIZE(rfgain_5413);
break;
case AR5K_RF2413:
ath5k_rfg = rfgain_2413;
size = ARRAY_SIZE(rfgain_2413);
break;
case AR5K_RF2425:
ath5k_rfg = rfgain_2425;
size = ARRAY_SIZE(rfgain_2425);
break;
default:
return -EINVAL;
}
switch (freq) {
case AR5K_INI_RFGAIN_2GHZ:
case AR5K_INI_RFGAIN_5GHZ:
break;
default:
return -EINVAL;
}
for (i = 0; i < size; i++) {
AR5K_REG_WAIT(i);
ath5k_hw_reg_write(ah, ath5k_rfg[i].rfg_value[freq],
(u32)ath5k_rfg[i].rfg_register);
}
return 0;
}
enum ath5k_rfgain ath5k_hw_get_rf_gain(struct ath5k_hw *ah)
{
u32 data, type;
ATH5K_TRACE(ah->ah_sc);
if (ah->ah_rf_banks == NULL || !ah->ah_gain.g_active ||
ah->ah_version <= AR5K_AR5211)
return AR5K_RFGAIN_INACTIVE;
if (ah->ah_rf_gain != AR5K_RFGAIN_READ_REQUESTED)
goto done;
data = ath5k_hw_reg_read(ah, AR5K_PHY_PAPD_PROBE);
if (!(data & AR5K_PHY_PAPD_PROBE_TX_NEXT)) {
ah->ah_gain.g_current = data >> AR5K_PHY_PAPD_PROBE_GAINF_S;
type = AR5K_REG_MS(data, AR5K_PHY_PAPD_PROBE_TYPE);
if (type == AR5K_PHY_PAPD_PROBE_TYPE_CCK)
ah->ah_gain.g_current += AR5K_GAIN_CCK_PROBE_CORR;
if (ah->ah_radio >= AR5K_RF5112) {
ath5k_hw_rfregs_gainf_corr(ah);
ah->ah_gain.g_current =
ah->ah_gain.g_current >= ah->ah_gain.g_f_corr ?
(ah->ah_gain.g_current-ah->ah_gain.g_f_corr) :
0;
}
if (ath5k_hw_rfregs_gain_readback(ah) &&
AR5K_GAIN_CHECK_ADJUST(&ah->ah_gain) &&
ath5k_hw_rfregs_gain_adjust(ah))
ah->ah_rf_gain = AR5K_RFGAIN_NEED_CHANGE;
}
done:
return ah->ah_rf_gain;
}
int ath5k_hw_set_rfgain_opt(struct ath5k_hw *ah)
{
/* Initialize the gain optimization values */
switch (ah->ah_radio) {
case AR5K_RF5111:
ah->ah_gain.g_step_idx = rfgain_opt_5111.go_default;
ah->ah_gain.g_step =
&rfgain_opt_5111.go_step[ah->ah_gain.g_step_idx];
ah->ah_gain.g_low = 20;
ah->ah_gain.g_high = 35;
ah->ah_gain.g_active = 1;
break;
case AR5K_RF5112:
ah->ah_gain.g_step_idx = rfgain_opt_5112.go_default;
ah->ah_gain.g_step =
&rfgain_opt_5112.go_step[ah->ah_gain.g_step_idx];
ah->ah_gain.g_low = 20;
ah->ah_gain.g_high = 85;
ah->ah_gain.g_active = 1;
break;
default:
return -EINVAL;
}
return 0;
}
/**************************\
PHY/RF channel functions
\**************************/
/*
* Check if a channel is supported
*/
bool ath5k_channel_ok(struct ath5k_hw *ah, u16 freq, unsigned int flags)
{
/* Check if the channel is in our supported range */
if (flags & CHANNEL_2GHZ) {
if ((freq >= ah->ah_capabilities.cap_range.range_2ghz_min) &&
(freq <= ah->ah_capabilities.cap_range.range_2ghz_max))
return true;
} else if (flags & CHANNEL_5GHZ)
if ((freq >= ah->ah_capabilities.cap_range.range_5ghz_min) &&
(freq <= ah->ah_capabilities.cap_range.range_5ghz_max))
return true;
return false;
}
/*
* Convertion needed for RF5110
*/
static u32 ath5k_hw_rf5110_chan2athchan(struct ieee80211_channel *channel)
{
u32 athchan;
/*
* Convert IEEE channel/MHz to an internal channel value used
* by the AR5210 chipset. This has not been verified with
* newer chipsets like the AR5212A who have a completely
* different RF/PHY part.
*/
athchan = (ath5k_hw_bitswap(
(ieee80211_frequency_to_channel(
channel->center_freq) - 24) / 2, 5)
<< 1) | (1 << 6) | 0x1;
return athchan;
}
/*
* Set channel on RF5110
*/
static int ath5k_hw_rf5110_channel(struct ath5k_hw *ah,
struct ieee80211_channel *channel)
{
u32 data;
/*
* Set the channel and wait
*/
data = ath5k_hw_rf5110_chan2athchan(channel);
ath5k_hw_reg_write(ah, data, AR5K_RF_BUFFER);
ath5k_hw_reg_write(ah, 0, AR5K_RF_BUFFER_CONTROL_0);
mdelay(1);
return 0;
}
/*
* Convertion needed for 5111
*/
static int ath5k_hw_rf5111_chan2athchan(unsigned int ieee,
struct ath5k_athchan_2ghz *athchan)
{
int channel;
/* Cast this value to catch negative channel numbers (>= -19) */
channel = (int)ieee;
/*
* Map 2GHz IEEE channel to 5GHz Atheros channel
*/
if (channel <= 13) {
athchan->a2_athchan = 115 + channel;
athchan->a2_flags = 0x46;
} else if (channel == 14) {
athchan->a2_athchan = 124;
athchan->a2_flags = 0x44;
} else if (channel >= 15 && channel <= 26) {
athchan->a2_athchan = ((channel - 14) * 4) + 132;
athchan->a2_flags = 0x46;
} else
return -EINVAL;
return 0;
}
/*
* Set channel on 5111
*/
static int ath5k_hw_rf5111_channel(struct ath5k_hw *ah,
struct ieee80211_channel *channel)
{
struct ath5k_athchan_2ghz ath5k_channel_2ghz;
unsigned int ath5k_channel =
ieee80211_frequency_to_channel(channel->center_freq);
u32 data0, data1, clock;
int ret;
/*
* Set the channel on the RF5111 radio
*/
data0 = data1 = 0;
if (channel->hw_value & CHANNEL_2GHZ) {
/* Map 2GHz channel to 5GHz Atheros channel ID */
ret = ath5k_hw_rf5111_chan2athchan(
ieee80211_frequency_to_channel(channel->center_freq),
&ath5k_channel_2ghz);
if (ret)
return ret;
ath5k_channel = ath5k_channel_2ghz.a2_athchan;
data0 = ((ath5k_hw_bitswap(ath5k_channel_2ghz.a2_flags, 8) & 0xff)
<< 5) | (1 << 4);
}
if (ath5k_channel < 145 || !(ath5k_channel & 1)) {
clock = 1;
data1 = ((ath5k_hw_bitswap(ath5k_channel - 24, 8) & 0xff) << 2) |
(clock << 1) | (1 << 10) | 1;
} else {
clock = 0;
data1 = ((ath5k_hw_bitswap((ath5k_channel - 24) / 2, 8) & 0xff)
<< 2) | (clock << 1) | (1 << 10) | 1;
}
ath5k_hw_reg_write(ah, (data1 & 0xff) | ((data0 & 0xff) << 8),
AR5K_RF_BUFFER);
ath5k_hw_reg_write(ah, ((data1 >> 8) & 0xff) | (data0 & 0xff00),
AR5K_RF_BUFFER_CONTROL_3);
return 0;
}
/*
* Set channel on 5112 and newer
*/
static int ath5k_hw_rf5112_channel(struct ath5k_hw *ah,
struct ieee80211_channel *channel)
{
u32 data, data0, data1, data2;
u16 c;
data = data0 = data1 = data2 = 0;
c = channel->center_freq;
if (c < 4800) {
if (!((c - 2224) % 5)) {
data0 = ((2 * (c - 704)) - 3040) / 10;
data1 = 1;
} else if (!((c - 2192) % 5)) {
data0 = ((2 * (c - 672)) - 3040) / 10;
data1 = 0;
} else
return -EINVAL;
data0 = ath5k_hw_bitswap((data0 << 2) & 0xff, 8);
} else if ((c - (c % 5)) != 2 || c > 5435) {
if (!(c % 20) && c >= 5120) {
data0 = ath5k_hw_bitswap(((c - 4800) / 20 << 2), 8);
data2 = ath5k_hw_bitswap(3, 2);
} else if (!(c % 10)) {
data0 = ath5k_hw_bitswap(((c - 4800) / 10 << 1), 8);
data2 = ath5k_hw_bitswap(2, 2);
} else if (!(c % 5)) {
data0 = ath5k_hw_bitswap((c - 4800) / 5, 8);
data2 = ath5k_hw_bitswap(1, 2);
} else
return -EINVAL;
} else {
data0 = ath5k_hw_bitswap((10 * (c - 2) - 4800) / 25 + 1, 8);
data2 = ath5k_hw_bitswap(0, 2);
}
data = (data0 << 4) | (data1 << 1) | (data2 << 2) | 0x1001;
ath5k_hw_reg_write(ah, data & 0xff, AR5K_RF_BUFFER);
ath5k_hw_reg_write(ah, (data >> 8) & 0x7f, AR5K_RF_BUFFER_CONTROL_5);
return 0;
}
/*
* Set the channel on the RF2425
*/
static int ath5k_hw_rf2425_channel(struct ath5k_hw *ah,
struct ieee80211_channel *channel)
{
u32 data, data0, data2;
u16 c;
data = data0 = data2 = 0;
c = channel->center_freq;
if (c < 4800) {
data0 = ath5k_hw_bitswap((c - 2272), 8);
data2 = 0;
/* ? 5GHz ? */
} else if ((c - (c % 5)) != 2 || c > 5435) {
if (!(c % 20) && c < 5120)
data0 = ath5k_hw_bitswap(((c - 4800) / 20 << 2), 8);
else if (!(c % 10))
data0 = ath5k_hw_bitswap(((c - 4800) / 10 << 1), 8);
else if (!(c % 5))
data0 = ath5k_hw_bitswap((c - 4800) / 5, 8);
else
return -EINVAL;
data2 = ath5k_hw_bitswap(1, 2);
} else {
data0 = ath5k_hw_bitswap((10 * (c - 2) - 4800) / 25 + 1, 8);
data2 = ath5k_hw_bitswap(0, 2);
}
data = (data0 << 4) | data2 << 2 | 0x1001;
ath5k_hw_reg_write(ah, data & 0xff, AR5K_RF_BUFFER);
ath5k_hw_reg_write(ah, (data >> 8) & 0x7f, AR5K_RF_BUFFER_CONTROL_5);
return 0;
}
/*
* Set a channel on the radio chip
*/
int ath5k_hw_channel(struct ath5k_hw *ah, struct ieee80211_channel *channel)
{
int ret;
/*
* Check bounds supported by the PHY (we don't care about regultory
* restrictions at this point). Note: hw_value already has the band
* (CHANNEL_2GHZ, or CHANNEL_5GHZ) so we inform ath5k_channel_ok()
* of the band by that */
if (!ath5k_channel_ok(ah, channel->center_freq, channel->hw_value)) {
ATH5K_ERR(ah->ah_sc,
"channel frequency (%u MHz) out of supported "
"band range\n",
channel->center_freq);
return -EINVAL;
}
/*
* Set the channel and wait
*/
switch (ah->ah_radio) {
case AR5K_RF5110:
ret = ath5k_hw_rf5110_channel(ah, channel);
break;
case AR5K_RF5111:
ret = ath5k_hw_rf5111_channel(ah, channel);
break;
case AR5K_RF2425:
ret = ath5k_hw_rf2425_channel(ah, channel);
break;
default:
ret = ath5k_hw_rf5112_channel(ah, channel);
break;
}
if (ret)
return ret;
/* Set JAPAN setting for channel 14 */
if (channel->center_freq == 2484) {
AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_CCKTXCTL,
AR5K_PHY_CCKTXCTL_JAPAN);
} else {
AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_CCKTXCTL,
AR5K_PHY_CCKTXCTL_WORLD);
}
ah->ah_current_channel.center_freq = channel->center_freq;
ah->ah_current_channel.hw_value = channel->hw_value;
ah->ah_turbo = channel->hw_value == CHANNEL_T ? true : false;
return 0;
}
/*****************\
PHY calibration
\*****************/
/**
* ath5k_hw_noise_floor_calibration - perform PHY noise floor calibration
*
* @ah: struct ath5k_hw pointer we are operating on
* @freq: the channel frequency, just used for error logging
*
* This function performs a noise floor calibration of the PHY and waits for
* it to complete. Then the noise floor value is compared to some maximum
* noise floor we consider valid.
*
* Note that this is different from what the madwifi HAL does: it reads the
* noise floor and afterwards initiates the calibration. Since the noise floor
* calibration can take some time to finish, depending on the current channel
* use, that avoids the occasional timeout warnings we are seeing now.
*
* See the following link for an Atheros patent on noise floor calibration:
* http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL \
* &p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=7245893.PN.&OS=PN/7
*
* XXX: Since during noise floor calibration antennas are detached according to
* the patent, we should stop tx queues here.
*/
int
ath5k_hw_noise_floor_calibration(struct ath5k_hw *ah, short freq)
{
int ret;
unsigned int i;
s32 noise_floor;
/*
* Enable noise floor calibration
*/
AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL,
AR5K_PHY_AGCCTL_NF);
ret = ath5k_hw_register_timeout(ah, AR5K_PHY_AGCCTL,
AR5K_PHY_AGCCTL_NF, 0, false);
if (ret) {
ATH5K_ERR(ah->ah_sc,
"noise floor calibration timeout (%uMHz)\n", freq);
return -EAGAIN;
}
/* Wait until the noise floor is calibrated and read the value */
for (i = 20; i > 0; i--) {
mdelay(1);
noise_floor = ath5k_hw_reg_read(ah, AR5K_PHY_NF);
noise_floor = AR5K_PHY_NF_RVAL(noise_floor);
if (noise_floor & AR5K_PHY_NF_ACTIVE) {
noise_floor = AR5K_PHY_NF_AVAL(noise_floor);
if (noise_floor <= AR5K_TUNE_NOISE_FLOOR)
break;
}
}
ATH5K_DBG_UNLIMIT(ah->ah_sc, ATH5K_DEBUG_CALIBRATE,
"noise floor %d\n", noise_floor);
if (noise_floor > AR5K_TUNE_NOISE_FLOOR) {
ATH5K_ERR(ah->ah_sc,
"noise floor calibration failed (%uMHz)\n", freq);
return -EAGAIN;
}
ah->ah_noise_floor = noise_floor;
return 0;
}
/*
* Perform a PHY calibration on RF5110
* -Fix BPSK/QAM Constellation (I/Q correction)
* -Calculate Noise Floor
*/
static int ath5k_hw_rf5110_calibrate(struct ath5k_hw *ah,
struct ieee80211_channel *channel)
{
u32 phy_sig, phy_agc, phy_sat, beacon;
int ret;
/*
* Disable beacons and RX/TX queues, wait
*/
AR5K_REG_ENABLE_BITS(ah, AR5K_DIAG_SW_5210,
AR5K_DIAG_SW_DIS_TX | AR5K_DIAG_SW_DIS_RX_5210);
beacon = ath5k_hw_reg_read(ah, AR5K_BEACON_5210);
ath5k_hw_reg_write(ah, beacon & ~AR5K_BEACON_ENABLE, AR5K_BEACON_5210);
mdelay(2);
/*
* Set the channel (with AGC turned off)
*/
AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGC, AR5K_PHY_AGC_DISABLE);
udelay(10);
ret = ath5k_hw_channel(ah, channel);
/*
* Activate PHY and wait
*/
ath5k_hw_reg_write(ah, AR5K_PHY_ACT_ENABLE, AR5K_PHY_ACT);
mdelay(1);
AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_AGC, AR5K_PHY_AGC_DISABLE);
if (ret)
return ret;
/*
* Calibrate the radio chip
*/
/* Remember normal state */
phy_sig = ath5k_hw_reg_read(ah, AR5K_PHY_SIG);
phy_agc = ath5k_hw_reg_read(ah, AR5K_PHY_AGCCOARSE);
phy_sat = ath5k_hw_reg_read(ah, AR5K_PHY_ADCSAT);
/* Update radio registers */
ath5k_hw_reg_write(ah, (phy_sig & ~(AR5K_PHY_SIG_FIRPWR)) |
AR5K_REG_SM(-1, AR5K_PHY_SIG_FIRPWR), AR5K_PHY_SIG);
ath5k_hw_reg_write(ah, (phy_agc & ~(AR5K_PHY_AGCCOARSE_HI |
AR5K_PHY_AGCCOARSE_LO)) |
AR5K_REG_SM(-1, AR5K_PHY_AGCCOARSE_HI) |
AR5K_REG_SM(-127, AR5K_PHY_AGCCOARSE_LO), AR5K_PHY_AGCCOARSE);
ath5k_hw_reg_write(ah, (phy_sat & ~(AR5K_PHY_ADCSAT_ICNT |
AR5K_PHY_ADCSAT_THR)) |
AR5K_REG_SM(2, AR5K_PHY_ADCSAT_ICNT) |
AR5K_REG_SM(12, AR5K_PHY_ADCSAT_THR), AR5K_PHY_ADCSAT);
udelay(20);
AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGC, AR5K_PHY_AGC_DISABLE);
udelay(10);
ath5k_hw_reg_write(ah, AR5K_PHY_RFSTG_DISABLE, AR5K_PHY_RFSTG);
AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_AGC, AR5K_PHY_AGC_DISABLE);
mdelay(1);
/*
* Enable calibration and wait until completion
*/
AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL, AR5K_PHY_AGCCTL_CAL);
ret = ath5k_hw_register_timeout(ah, AR5K_PHY_AGCCTL,
AR5K_PHY_AGCCTL_CAL, 0, false);
/* Reset to normal state */
ath5k_hw_reg_write(ah, phy_sig, AR5K_PHY_SIG);
ath5k_hw_reg_write(ah, phy_agc, AR5K_PHY_AGCCOARSE);
ath5k_hw_reg_write(ah, phy_sat, AR5K_PHY_ADCSAT);
if (ret) {
ATH5K_ERR(ah->ah_sc, "calibration timeout (%uMHz)\n",
channel->center_freq);
return ret;
}
ath5k_hw_noise_floor_calibration(ah, channel->center_freq);
/*
* Re-enable RX/TX and beacons
*/
AR5K_REG_DISABLE_BITS(ah, AR5K_DIAG_SW_5210,
AR5K_DIAG_SW_DIS_TX | AR5K_DIAG_SW_DIS_RX_5210);
ath5k_hw_reg_write(ah, beacon, AR5K_BEACON_5210);
return 0;
}
/*
* Perform a PHY calibration on RF5111/5112 and newer chips
*/
static int ath5k_hw_rf511x_calibrate(struct ath5k_hw *ah,
struct ieee80211_channel *channel)
{
u32 i_pwr, q_pwr;
s32 iq_corr, i_coff, i_coffd, q_coff, q_coffd;
int i;
ATH5K_TRACE(ah->ah_sc);
if (!ah->ah_calibration ||
ath5k_hw_reg_read(ah, AR5K_PHY_IQ) & AR5K_PHY_IQ_RUN)
goto done;
/* Calibration has finished, get the results and re-run */
for (i = 0; i <= 10; i++) {
iq_corr = ath5k_hw_reg_read(ah, AR5K_PHY_IQRES_CAL_CORR);
i_pwr = ath5k_hw_reg_read(ah, AR5K_PHY_IQRES_CAL_PWR_I);
q_pwr = ath5k_hw_reg_read(ah, AR5K_PHY_IQRES_CAL_PWR_Q);
}
i_coffd = ((i_pwr >> 1) + (q_pwr >> 1)) >> 7;
q_coffd = q_pwr >> 7;
/* No correction */
if (i_coffd == 0 || q_coffd == 0)
goto done;
i_coff = ((-iq_corr) / i_coffd) & 0x3f;
/* Boundary check */
if (i_coff > 31)
i_coff = 31;
if (i_coff < -32)
i_coff = -32;
q_coff = (((s32)i_pwr / q_coffd) - 128) & 0x1f;
/* Boundary check */
if (q_coff > 15)
q_coff = 15;
if (q_coff < -16)
q_coff = -16;
/* Commit new I/Q value */
AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_ENABLE |
((u32)q_coff) | ((u32)i_coff << AR5K_PHY_IQ_CORR_Q_I_COFF_S));
/* Re-enable calibration -if we don't we'll commit
* the same values again and again */
AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ,
AR5K_PHY_IQ_CAL_NUM_LOG_MAX, 15);
AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_RUN);
done:
/* TODO: Separate noise floor calibration from I/Q calibration
* since noise floor calibration interrupts rx path while I/Q
* calibration doesn't. We don't need to run noise floor calibration
* as often as I/Q calibration.*/
ath5k_hw_noise_floor_calibration(ah, channel->center_freq);
/* Request RF gain */
if (channel->hw_value & CHANNEL_5GHZ) {
ath5k_hw_reg_write(ah, AR5K_REG_SM(ah->ah_txpower.txp_max,
AR5K_PHY_PAPD_PROBE_TXPOWER) |
AR5K_PHY_PAPD_PROBE_TX_NEXT, AR5K_PHY_PAPD_PROBE);
ah->ah_rf_gain = AR5K_RFGAIN_READ_REQUESTED;
}
return 0;
}
/*
* Perform a PHY calibration
*/
int ath5k_hw_phy_calibrate(struct ath5k_hw *ah,
struct ieee80211_channel *channel)
{
int ret;
if (ah->ah_radio == AR5K_RF5110)
ret = ath5k_hw_rf5110_calibrate(ah, channel);
else
ret = ath5k_hw_rf511x_calibrate(ah, channel);
return ret;
}
int ath5k_hw_phy_disable(struct ath5k_hw *ah)
{
ATH5K_TRACE(ah->ah_sc);
/*Just a try M.F.*/
ath5k_hw_reg_write(ah, AR5K_PHY_ACT_DISABLE, AR5K_PHY_ACT);
return 0;
}
/********************\
Misc PHY functions
\********************/
/*
* Get the PHY Chip revision
*/
u16 ath5k_hw_radio_revision(struct ath5k_hw *ah, unsigned int chan)
{
unsigned int i;
u32 srev;
u16 ret;
ATH5K_TRACE(ah->ah_sc);
/*
* Set the radio chip access register
*/
switch (chan) {
case CHANNEL_2GHZ:
ath5k_hw_reg_write(ah, AR5K_PHY_SHIFT_2GHZ, AR5K_PHY(0));
break;
case CHANNEL_5GHZ:
ath5k_hw_reg_write(ah, AR5K_PHY_SHIFT_5GHZ, AR5K_PHY(0));
break;
default:
return 0;
}
mdelay(2);
/* ...wait until PHY is ready and read the selected radio revision */
ath5k_hw_reg_write(ah, 0x00001c16, AR5K_PHY(0x34));
for (i = 0; i < 8; i++)
ath5k_hw_reg_write(ah, 0x00010000, AR5K_PHY(0x20));
if (ah->ah_version == AR5K_AR5210) {
srev = ath5k_hw_reg_read(ah, AR5K_PHY(256) >> 28) & 0xf;
ret = (u16)ath5k_hw_bitswap(srev, 4) + 1;
} else {
srev = (ath5k_hw_reg_read(ah, AR5K_PHY(0x100)) >> 24) & 0xff;
ret = (u16)ath5k_hw_bitswap(((srev & 0xf0) >> 4) |
((srev & 0x0f) << 4), 8);
}
/* Reset to the 5GHz mode */
ath5k_hw_reg_write(ah, AR5K_PHY_SHIFT_5GHZ, AR5K_PHY(0));
return ret;
}
void /*TODO:Boundary check*/
ath5k_hw_set_def_antenna(struct ath5k_hw *ah, unsigned int ant)
{
ATH5K_TRACE(ah->ah_sc);
/*Just a try M.F.*/
if (ah->ah_version != AR5K_AR5210)
ath5k_hw_reg_write(ah, ant, AR5K_DEFAULT_ANTENNA);
}
unsigned int ath5k_hw_get_def_antenna(struct ath5k_hw *ah)
{
ATH5K_TRACE(ah->ah_sc);
/*Just a try M.F.*/
if (ah->ah_version != AR5K_AR5210)
return ath5k_hw_reg_read(ah, AR5K_DEFAULT_ANTENNA);
return false; /*XXX: What do we return for 5210 ?*/
}
/*
* TX power setup
*/
/*
* Initialize the tx power table (not fully implemented)
*/
static void ath5k_txpower_table(struct ath5k_hw *ah,
struct ieee80211_channel *channel, s16 max_power)
{
unsigned int i, min, max, n;
u16 txpower, *rates;
rates = ah->ah_txpower.txp_rates;
txpower = AR5K_TUNE_DEFAULT_TXPOWER * 2;
if (max_power > txpower)
txpower = max_power > AR5K_TUNE_MAX_TXPOWER ?
AR5K_TUNE_MAX_TXPOWER : max_power;
for (i = 0; i < AR5K_MAX_RATES; i++)
rates[i] = txpower;
/* XXX setup target powers by rate */
ah->ah_txpower.txp_min = rates[7];
ah->ah_txpower.txp_max = rates[0];
ah->ah_txpower.txp_ofdm = rates[0];
/* Calculate the power table */
n = ARRAY_SIZE(ah->ah_txpower.txp_pcdac);
min = AR5K_EEPROM_PCDAC_START;
max = AR5K_EEPROM_PCDAC_STOP;
for (i = 0; i < n; i += AR5K_EEPROM_PCDAC_STEP)
ah->ah_txpower.txp_pcdac[i] =
#ifdef notyet
min + ((i * (max - min)) / n);
#else
min;
#endif
}
/*
* Set transmition power
*/
int /*O.K. - txpower_table is unimplemented so this doesn't work*/
ath5k_hw_txpower(struct ath5k_hw *ah, struct ieee80211_channel *channel,
unsigned int txpower)
{
bool tpc = ah->ah_txpower.txp_tpc;
unsigned int i;
ATH5K_TRACE(ah->ah_sc);
if (txpower > AR5K_TUNE_MAX_TXPOWER) {
ATH5K_ERR(ah->ah_sc, "invalid tx power: %u\n", txpower);
return -EINVAL;
}
/*
* RF2413 for some reason can't
* transmit anything if we call
* this funtion, so we skip it
* until we fix txpower.
*
* XXX: Assume same for RF2425
* to be safe.
*/
if ((ah->ah_radio == AR5K_RF2413) || (ah->ah_radio == AR5K_RF2425))
return 0;
/* Reset TX power values */
memset(&ah->ah_txpower, 0, sizeof(ah->ah_txpower));
ah->ah_txpower.txp_tpc = tpc;
/* Initialize TX power table */
ath5k_txpower_table(ah, channel, txpower);
/*
* Write TX power values
*/
for (i = 0; i < (AR5K_EEPROM_POWER_TABLE_SIZE / 2); i++) {
ath5k_hw_reg_write(ah,
((((ah->ah_txpower.txp_pcdac[(i << 1) + 1] << 8) | 0xff) & 0xffff) << 16) |
(((ah->ah_txpower.txp_pcdac[(i << 1) ] << 8) | 0xff) & 0xffff),
AR5K_PHY_PCDAC_TXPOWER(i));
}
ath5k_hw_reg_write(ah, AR5K_TXPOWER_OFDM(3, 24) |
AR5K_TXPOWER_OFDM(2, 16) | AR5K_TXPOWER_OFDM(1, 8) |
AR5K_TXPOWER_OFDM(0, 0), AR5K_PHY_TXPOWER_RATE1);
ath5k_hw_reg_write(ah, AR5K_TXPOWER_OFDM(7, 24) |
AR5K_TXPOWER_OFDM(6, 16) | AR5K_TXPOWER_OFDM(5, 8) |
AR5K_TXPOWER_OFDM(4, 0), AR5K_PHY_TXPOWER_RATE2);
ath5k_hw_reg_write(ah, AR5K_TXPOWER_CCK(10, 24) |
AR5K_TXPOWER_CCK(9, 16) | AR5K_TXPOWER_CCK(15, 8) |
AR5K_TXPOWER_CCK(8, 0), AR5K_PHY_TXPOWER_RATE3);
ath5k_hw_reg_write(ah, AR5K_TXPOWER_CCK(14, 24) |
AR5K_TXPOWER_CCK(13, 16) | AR5K_TXPOWER_CCK(12, 8) |
AR5K_TXPOWER_CCK(11, 0), AR5K_PHY_TXPOWER_RATE4);
if (ah->ah_txpower.txp_tpc)
ath5k_hw_reg_write(ah, AR5K_PHY_TXPOWER_RATE_MAX_TPC_ENABLE |
AR5K_TUNE_MAX_TXPOWER, AR5K_PHY_TXPOWER_RATE_MAX);
else
ath5k_hw_reg_write(ah, AR5K_PHY_TXPOWER_RATE_MAX |
AR5K_TUNE_MAX_TXPOWER, AR5K_PHY_TXPOWER_RATE_MAX);
return 0;
}
int ath5k_hw_set_txpower_limit(struct ath5k_hw *ah, unsigned int power)
{
/*Just a try M.F.*/
struct ieee80211_channel *channel = &ah->ah_current_channel;
ATH5K_TRACE(ah->ah_sc);
ATH5K_DBG(ah->ah_sc, ATH5K_DEBUG_TXPOWER,
"changing txpower to %d\n", power);
return ath5k_hw_txpower(ah, channel, power);
}
#undef _ATH5K_PHY
