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linux/drivers/net/wireless/ath/ath9k/ar9003_hw.c
Luis R. Rodriguez e36b27aff1 ath9k: add new ANI implementation for AR9003 
This adds support for ANI for AR9003. The implementation for
ANI for AR9003 is slightly different than the one used for
the older chipset families. It can technically be used for
the older families as well but this is not yet fully tested
so we only enable the new ANI for the AR5008, AR9001 and AR9002
families with a module parameter, force_new_ani.

The old ANI implementation is left intact.

Details of the new ANI implemention:

  * ANI adjustment logic is now table driven so that each ANI level
    setting is parameterized. This makes adjustments much more
    deterministic than the old procedure based logic and allows
    adjustments to be made incrementally to several parameters per
    level.

  * ANI register settings are now relative to INI values; so ANI
    param zero level == INI value. Appropriate floor and ceiling
    values are obeyed when adjustments are combined with INI values.

  * ANI processing is done once per second rather that every 100ms.
    The poll interval is now a set upon hardware initialization and
    can be picked up by the core driver.

  * OFDM error and CCK error processing are made in a round robin
    fashion rather than allowing all OFDM adjustments to be made
    before CCK adjustments.

  * ANI adjusts MRC CCK off in the presence of high CCK errors

  * When adjusting spur immunity (SI) and OFDM weak signal detection,
    ANI now sets register values for the extension channel too

  * When adjusting FIR step (ST), ANI now sets register for FIR step
    low too

  * FIR step adjustments now allow for an extra level of immunity for
    extremely noisy environments

  * The old Noise immunity setting (NI), which changes coarse low, size
    desired, etc have been removed. Changing these settings could affect
    up RIFS RX as well.

  * CCK weak signal adjustment is no longer used

  * ANI no longer enables phy error interrupts; in all cases phy hw
    counting registers are used instead

  * The phy error count (overflow) interrupts are also no longer used
    for ANI adjustments. All ANI adjustments are made via the polling
    routine and no adjustments are possible in the ISR context anymore

  * A history settings buffer is now correctly used for each channel;
    channel settings are initialized with the defaults but later
    changes are restored when returning back to that channel

  * When scanning, ANI is disabled settings are returned to (INI) defaults.

  * OFDM phy error thresholds are now 400 & 1000 (errors/second units) for
    low/high water marks, providing increased stability/hysteresis when
    changing levels.

  * Similarly CCK phy error thresholds are now 300 & 600 (errors/second)

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2010-06-14 15:39:29 -04:00

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/*
* Copyright (c) 2008-2010 Atheros Communications Inc.
*
* Permission to use, copy, modify, and/or 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.
*/
#include "hw.h"
#include "ar9003_mac.h"
#include "ar9003_2p0_initvals.h"
#include "ar9003_2p2_initvals.h"
/* General hardware code for the AR9003 hadware family */
static bool ar9003_hw_macversion_supported(u32 macversion)
{
switch (macversion) {
case AR_SREV_VERSION_9300:
return true;
default:
break;
}
return false;
}
/* AR9003 2.0 */
static void ar9003_2p0_hw_init_mode_regs(struct ath_hw *ah)
{
/* mac */
INIT_INI_ARRAY(&ah->iniMac[ATH_INI_PRE], NULL, 0, 0);
INIT_INI_ARRAY(&ah->iniMac[ATH_INI_CORE],
ar9300_2p0_mac_core,
ARRAY_SIZE(ar9300_2p0_mac_core), 2);
INIT_INI_ARRAY(&ah->iniMac[ATH_INI_POST],
ar9300_2p0_mac_postamble,
ARRAY_SIZE(ar9300_2p0_mac_postamble), 5);
/* bb */
INIT_INI_ARRAY(&ah->iniBB[ATH_INI_PRE], NULL, 0, 0);
INIT_INI_ARRAY(&ah->iniBB[ATH_INI_CORE],
ar9300_2p0_baseband_core,
ARRAY_SIZE(ar9300_2p0_baseband_core), 2);
INIT_INI_ARRAY(&ah->iniBB[ATH_INI_POST],
ar9300_2p0_baseband_postamble,
ARRAY_SIZE(ar9300_2p0_baseband_postamble), 5);
/* radio */
INIT_INI_ARRAY(&ah->iniRadio[ATH_INI_PRE], NULL, 0, 0);
INIT_INI_ARRAY(&ah->iniRadio[ATH_INI_CORE],
ar9300_2p0_radio_core,
ARRAY_SIZE(ar9300_2p0_radio_core), 2);
INIT_INI_ARRAY(&ah->iniRadio[ATH_INI_POST],
ar9300_2p0_radio_postamble,
ARRAY_SIZE(ar9300_2p0_radio_postamble), 5);
/* soc */
INIT_INI_ARRAY(&ah->iniSOC[ATH_INI_PRE],
ar9300_2p0_soc_preamble,
ARRAY_SIZE(ar9300_2p0_soc_preamble), 2);
INIT_INI_ARRAY(&ah->iniSOC[ATH_INI_CORE], NULL, 0, 0);
INIT_INI_ARRAY(&ah->iniSOC[ATH_INI_POST],
ar9300_2p0_soc_postamble,
ARRAY_SIZE(ar9300_2p0_soc_postamble), 5);
/* rx/tx gain */
INIT_INI_ARRAY(&ah->iniModesRxGain,
ar9300Common_rx_gain_table_2p0,
ARRAY_SIZE(ar9300Common_rx_gain_table_2p0), 2);
INIT_INI_ARRAY(&ah->iniModesTxGain,
ar9300Modes_lowest_ob_db_tx_gain_table_2p0,
ARRAY_SIZE(ar9300Modes_lowest_ob_db_tx_gain_table_2p0),
5);
/* Load PCIE SERDES settings from INI */
/* Awake Setting */
INIT_INI_ARRAY(&ah->iniPcieSerdes,
ar9300PciePhy_pll_on_clkreq_disable_L1_2p0,
ARRAY_SIZE(ar9300PciePhy_pll_on_clkreq_disable_L1_2p0),
2);
/* Sleep Setting */
INIT_INI_ARRAY(&ah->iniPcieSerdesLowPower,
ar9300PciePhy_clkreq_enable_L1_2p0,
ARRAY_SIZE(ar9300PciePhy_clkreq_enable_L1_2p0),
2);
/* Fast clock modal settings */
INIT_INI_ARRAY(&ah->iniModesAdditional,
ar9300Modes_fast_clock_2p0,
ARRAY_SIZE(ar9300Modes_fast_clock_2p0),
3);
}
/* AR9003 2.2 */
static void ar9003_2p2_hw_init_mode_regs(struct ath_hw *ah)
{
/* mac */
INIT_INI_ARRAY(&ah->iniMac[ATH_INI_PRE], NULL, 0, 0);
INIT_INI_ARRAY(&ah->iniMac[ATH_INI_CORE],
ar9300_2p2_mac_core,
ARRAY_SIZE(ar9300_2p2_mac_core), 2);
INIT_INI_ARRAY(&ah->iniMac[ATH_INI_POST],
ar9300_2p2_mac_postamble,
ARRAY_SIZE(ar9300_2p2_mac_postamble), 5);
/* bb */
INIT_INI_ARRAY(&ah->iniBB[ATH_INI_PRE], NULL, 0, 0);
INIT_INI_ARRAY(&ah->iniBB[ATH_INI_CORE],
ar9300_2p2_baseband_core,
ARRAY_SIZE(ar9300_2p2_baseband_core), 2);
INIT_INI_ARRAY(&ah->iniBB[ATH_INI_POST],
ar9300_2p2_baseband_postamble,
ARRAY_SIZE(ar9300_2p2_baseband_postamble), 5);
/* radio */
INIT_INI_ARRAY(&ah->iniRadio[ATH_INI_PRE], NULL, 0, 0);
INIT_INI_ARRAY(&ah->iniRadio[ATH_INI_CORE],
ar9300_2p2_radio_core,
ARRAY_SIZE(ar9300_2p2_radio_core), 2);
INIT_INI_ARRAY(&ah->iniRadio[ATH_INI_POST],
ar9300_2p2_radio_postamble,
ARRAY_SIZE(ar9300_2p2_radio_postamble), 5);
/* soc */
INIT_INI_ARRAY(&ah->iniSOC[ATH_INI_PRE],
ar9300_2p2_soc_preamble,
ARRAY_SIZE(ar9300_2p2_soc_preamble), 2);
INIT_INI_ARRAY(&ah->iniSOC[ATH_INI_CORE], NULL, 0, 0);
INIT_INI_ARRAY(&ah->iniSOC[ATH_INI_POST],
ar9300_2p2_soc_postamble,
ARRAY_SIZE(ar9300_2p2_soc_postamble), 5);
/* rx/tx gain */
INIT_INI_ARRAY(&ah->iniModesRxGain,
ar9300Common_rx_gain_table_2p2,
ARRAY_SIZE(ar9300Common_rx_gain_table_2p2), 2);
INIT_INI_ARRAY(&ah->iniModesTxGain,
ar9300Modes_lowest_ob_db_tx_gain_table_2p2,
ARRAY_SIZE(ar9300Modes_lowest_ob_db_tx_gain_table_2p2),
5);
/* Load PCIE SERDES settings from INI */
/* Awake Setting */
INIT_INI_ARRAY(&ah->iniPcieSerdes,
ar9300PciePhy_pll_on_clkreq_disable_L1_2p2,
ARRAY_SIZE(ar9300PciePhy_pll_on_clkreq_disable_L1_2p2),
2);
/* Sleep Setting */
INIT_INI_ARRAY(&ah->iniPcieSerdesLowPower,
ar9300PciePhy_clkreq_enable_L1_2p2,
ARRAY_SIZE(ar9300PciePhy_clkreq_enable_L1_2p2),
2);
/* Fast clock modal settings */
INIT_INI_ARRAY(&ah->iniModesAdditional,
ar9300Modes_fast_clock_2p2,
ARRAY_SIZE(ar9300Modes_fast_clock_2p2),
3);
}
/*
* The AR9003 family uses a new INI format (pre, core, post
* arrays per subsystem).
*/
static void ar9003_hw_init_mode_regs(struct ath_hw *ah)
{
if (AR_SREV_9300_20(ah))
ar9003_2p0_hw_init_mode_regs(ah);
else
ar9003_2p2_hw_init_mode_regs(ah);
}
static void ar9003_tx_gain_table_apply(struct ath_hw *ah)
{
switch (ar9003_hw_get_tx_gain_idx(ah)) {
case 0:
default:
if (AR_SREV_9300_20(ah))
INIT_INI_ARRAY(&ah->iniModesTxGain,
ar9300Modes_lowest_ob_db_tx_gain_table_2p0,
ARRAY_SIZE(ar9300Modes_lowest_ob_db_tx_gain_table_2p0),
5);
else
INIT_INI_ARRAY(&ah->iniModesTxGain,
ar9300Modes_lowest_ob_db_tx_gain_table_2p2,
ARRAY_SIZE(ar9300Modes_lowest_ob_db_tx_gain_table_2p2),
5);
break;
case 1:
if (AR_SREV_9300_20(ah))
INIT_INI_ARRAY(&ah->iniModesTxGain,
ar9300Modes_high_ob_db_tx_gain_table_2p0,
ARRAY_SIZE(ar9300Modes_high_ob_db_tx_gain_table_2p0),
5);
else
INIT_INI_ARRAY(&ah->iniModesTxGain,
ar9300Modes_high_ob_db_tx_gain_table_2p2,
ARRAY_SIZE(ar9300Modes_high_ob_db_tx_gain_table_2p2),
5);
break;
case 2:
if (AR_SREV_9300_20(ah))
INIT_INI_ARRAY(&ah->iniModesTxGain,
ar9300Modes_low_ob_db_tx_gain_table_2p0,
ARRAY_SIZE(ar9300Modes_low_ob_db_tx_gain_table_2p0),
5);
else
INIT_INI_ARRAY(&ah->iniModesTxGain,
ar9300Modes_low_ob_db_tx_gain_table_2p2,
ARRAY_SIZE(ar9300Modes_low_ob_db_tx_gain_table_2p2),
5);
break;
}
}
static void ar9003_rx_gain_table_apply(struct ath_hw *ah)
{
switch (ar9003_hw_get_rx_gain_idx(ah)) {
case 0:
default:
if (AR_SREV_9300_20(ah))
INIT_INI_ARRAY(&ah->iniModesRxGain,
ar9300Common_rx_gain_table_2p0,
ARRAY_SIZE(ar9300Common_rx_gain_table_2p0),
2);
else
INIT_INI_ARRAY(&ah->iniModesRxGain,
ar9300Common_rx_gain_table_2p2,
ARRAY_SIZE(ar9300Common_rx_gain_table_2p2),
2);
break;
case 1:
if (AR_SREV_9300_20(ah))
INIT_INI_ARRAY(&ah->iniModesRxGain,
ar9300Common_wo_xlna_rx_gain_table_2p0,
ARRAY_SIZE(ar9300Common_wo_xlna_rx_gain_table_2p0),
2);
else
INIT_INI_ARRAY(&ah->iniModesRxGain,
ar9300Common_wo_xlna_rx_gain_table_2p2,
ARRAY_SIZE(ar9300Common_wo_xlna_rx_gain_table_2p2),
2);
break;
}
}
/* set gain table pointers according to values read from the eeprom */
static void ar9003_hw_init_mode_gain_regs(struct ath_hw *ah)
{
ar9003_tx_gain_table_apply(ah);
ar9003_rx_gain_table_apply(ah);
}
/*
* Helper for ASPM support.
*
* Disable PLL when in L0s as well as receiver clock when in L1.
* This power saving option must be enabled through the SerDes.
*
* Programming the SerDes must go through the same 288 bit serial shift
* register as the other analog registers. Hence the 9 writes.
*/
static void ar9003_hw_configpcipowersave(struct ath_hw *ah,
int restore,
int power_off)
{
if (ah->is_pciexpress != true)
return;
/* Do not touch SerDes registers */
if (ah->config.pcie_powersave_enable == 2)
return;
/* Nothing to do on restore for 11N */
if (!restore) {
/* set bit 19 to allow forcing of pcie core into L1 state */
REG_SET_BIT(ah, AR_PCIE_PM_CTRL, AR_PCIE_PM_CTRL_ENA);
/* Several PCIe massages to ensure proper behaviour */
if (ah->config.pcie_waen)
REG_WRITE(ah, AR_WA, ah->config.pcie_waen);
}
}
/* Sets up the AR9003 hardware familiy callbacks */
void ar9003_hw_attach_ops(struct ath_hw *ah)
{
struct ath_hw_private_ops *priv_ops = ath9k_hw_private_ops(ah);
struct ath_hw_ops *ops = ath9k_hw_ops(ah);
priv_ops->init_mode_regs = ar9003_hw_init_mode_regs;
priv_ops->init_mode_gain_regs = ar9003_hw_init_mode_gain_regs;
priv_ops->macversion_supported = ar9003_hw_macversion_supported;
ops->config_pci_powersave = ar9003_hw_configpcipowersave;
ar9003_hw_attach_phy_ops(ah);
ar9003_hw_attach_calib_ops(ah);
ar9003_hw_attach_mac_ops(ah);
ath9k_hw_attach_ani_ops_new(ah);
}
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