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ath9k_hw: Add radio retention support for AR9480 

Supported calibrations of radio retention table (RTT) are
	- DC offset
	- Filter
	- Peak detect

Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Rajkumar Manoharan 2011-10-13 11:00:41 +05:30 committed by John W. Linville
parent 1aef40b82c
commit 324c74ad64
8 changed files with 315 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/wireless/ath/ath9k/Makefile
View File

@ -21,6 +21,7 @@ ath9k_hw-y:= \
ar5008_phy.o \
ar9002_calib.o \
ar9003_calib.o \
ar9003_rtt.o \
calib.o \
eeprom.o \
eeprom_def.o \

113
drivers/net/wireless/ath/ath9k/ar9003_calib.c
View File

@ -17,6 +17,7 @@
#include "hw.h"
#include "hw-ops.h"
#include "ar9003_phy.h"
#include "ar9003_rtt.h"
#define MAX_MEASUREMENT MAX_IQCAL_MEASUREMENT
#define MAX_MAG_DELTA 11
@ -900,25 +901,81 @@ static void ar9003_hw_tx_iq_cal_reload(struct ath_hw *ah)
AR_PHY_RX_IQCAL_CORR_B0_LOOPBACK_IQCORR_EN, 0x1);
}
static bool ar9003_hw_rtt_restore(struct ath_hw *ah, struct ath9k_channel *chan)
{
struct ath9k_rtt_hist *hist;
u32 *table;
int i;
bool restore;
if (!(ah->caps.hw_caps & ATH9K_HW_CAP_RTT) || !ah->caldata)
return false;
hist = &ah->caldata->rtt_hist;
ar9003_hw_rtt_enable(ah);
ar9003_hw_rtt_set_mask(ah, 0x10);
for (i = 0; i < AR9300_MAX_CHAINS; i++) {
if (!(ah->rxchainmask & (1 << i)))
continue;
table = &hist->table[i][hist->num_readings][0];
ar9003_hw_rtt_load_hist(ah, i, table);
}
restore = ar9003_hw_rtt_force_restore(ah);
ar9003_hw_rtt_disable(ah);
return restore;
}
static bool ar9003_hw_init_cal(struct ath_hw *ah,
struct ath9k_channel *chan)
{
struct ath_common *common = ath9k_hw_common(ah);
struct ath9k_hw_cal_data *caldata = ah->caldata;
bool txiqcal_done = false, txclcal_done = false;
bool is_reusable = true;
bool is_reusable = true, status = true;
bool run_rtt_cal = false, run_agc_cal;
bool rtt = !!(ah->caps.hw_caps & ATH9K_HW_CAP_RTT);
u32 agc_ctrl = 0, agc_supp_cals = AR_PHY_AGC_CONTROL_OFFSET_CAL |
AR_PHY_AGC_CONTROL_FLTR_CAL |
AR_PHY_AGC_CONTROL_PKDET_CAL;
int i, j;
u32 cl_idx[AR9300_MAX_CHAINS] = { AR_PHY_CL_TAB_0,
AR_PHY_CL_TAB_1,
AR_PHY_CL_TAB_2 };
if (rtt) {
if (!ar9003_hw_rtt_restore(ah, chan))
run_rtt_cal = true;
ath_dbg(common, ATH_DBG_CALIBRATE, "RTT restore %s\n",
run_rtt_cal ? "failed" : "succeed");
}
run_agc_cal = run_rtt_cal;
if (run_rtt_cal) {
ar9003_hw_rtt_enable(ah);
ar9003_hw_rtt_set_mask(ah, 0x00);
ar9003_hw_rtt_clear_hist(ah);
}
if (rtt && !run_rtt_cal) {
agc_ctrl = REG_READ(ah, AR_PHY_AGC_CONTROL);
agc_supp_cals &= agc_ctrl;
agc_ctrl &= ~(AR_PHY_AGC_CONTROL_OFFSET_CAL |
AR_PHY_AGC_CONTROL_FLTR_CAL |
AR_PHY_AGC_CONTROL_PKDET_CAL);
REG_WRITE(ah, AR_PHY_AGC_CONTROL, agc_ctrl);
}
if (ah->enabled_cals & TX_CL_CAL) {
if (caldata && caldata->done_txclcal_once)
REG_CLR_BIT(ah, AR_PHY_CL_CAL_CTL,
AR_PHY_CL_CAL_ENABLE);
else
else {
REG_SET_BIT(ah, AR_PHY_CL_CAL_CTL,
AR_PHY_CL_CAL_ENABLE);
run_agc_cal = true;
}
}
if (!(ah->enabled_cals & TX_IQ_CAL))
@ -940,25 +997,41 @@ static bool ar9003_hw_init_cal(struct ath_hw *ah,
else
REG_CLR_BIT(ah, AR_PHY_TX_IQCAL_CONTROL_0,
AR_PHY_TX_IQCAL_CONTROL_0_ENABLE_TXIQ_CAL);
txiqcal_done = true;
txiqcal_done = run_agc_cal = true;
goto skip_tx_iqcal;
}
} else if (caldata && !caldata->done_txiqcal_once)
run_agc_cal = true;
txiqcal_done = ar9003_hw_tx_iq_cal_run(ah);
REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_DIS);
udelay(5);
REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_EN);
skip_tx_iqcal:
/* Calibrate the AGC */
REG_WRITE(ah, AR_PHY_AGC_CONTROL,
REG_READ(ah, AR_PHY_AGC_CONTROL) |
AR_PHY_AGC_CONTROL_CAL);
/* Poll for offset calibration complete */
if (!ath9k_hw_wait(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL,
0, AH_WAIT_TIMEOUT)) {
if (run_agc_cal) {
/* Calibrate the AGC */
REG_WRITE(ah, AR_PHY_AGC_CONTROL,
REG_READ(ah, AR_PHY_AGC_CONTROL) |
AR_PHY_AGC_CONTROL_CAL);
/* Poll for offset calibration complete */
status = ath9k_hw_wait(ah, AR_PHY_AGC_CONTROL,
AR_PHY_AGC_CONTROL_CAL,
0, AH_WAIT_TIMEOUT);
}
if (rtt && !run_rtt_cal) {
agc_ctrl |= agc_supp_cals;
REG_WRITE(ah, AR_PHY_AGC_CONTROL, agc_ctrl);
}
if (!status) {
if (run_rtt_cal)
ar9003_hw_rtt_disable(ah);
ath_dbg(common, ATH_DBG_CALIBRATE,
"offset calibration failed to complete in 1ms; noisy environment?\n");
"offset calibration failed to complete in 1ms;"
"noisy environment?\n");
return false;
}
@ -993,6 +1066,22 @@ skip_tx_iqcal:
}
#undef CL_TAB_ENTRY
if (run_rtt_cal && caldata) {
struct ath9k_rtt_hist *hist = &caldata->rtt_hist;
if (is_reusable && (hist->num_readings < RTT_HIST_MAX)) {
u32 *table;
for (i = 0; i < AR9300_MAX_CHAINS; i++) {
if (!(ah->rxchainmask & (1 << i)))
continue;
table = &hist->table[i][hist->num_readings][0];
ar9003_hw_rtt_fill_hist(ah, i, table);
}
}
ar9003_hw_rtt_disable(ah);
}
ath9k_hw_loadnf(ah, chan);
ath9k_hw_start_nfcal(ah, true);

20
drivers/net/wireless/ath/ath9k/ar9003_phy.h
View File

@ -584,8 +584,6 @@
(AR_SREV_9485(ah) ? \
0x3d0 : 0x450) + ((_i) << 2))
#define AR_PHY_RTT_CTRL (AR_SM_BASE + 0x380)
#define AR_PHY_RTT_TABLE_SW_INTF_B (AR_SM_BASE + 0x384)
#define AR_PHY_RTT_TABLE_SW_INTF_1_B0 (AR_SM_BASE + 0x388)
#define AR_PHY_WATCHDOG_STATUS (AR_SM_BASE + 0x5c0)
#define AR_PHY_WATCHDOG_CTL_1 (AR_SM_BASE + 0x5c4)
@ -825,6 +823,20 @@
#define AR_PHY_SPECTRAL_SCAN_SHORT_REPEAT 0x01000000
#define AR_PHY_SPECTRAL_SCAN_SHORT_REPEAT_S 24
#define AR_PHY_CHANNEL_STATUS_RX_CLEAR 0x00000004
#define AR_PHY_RTT_CTRL_ENA_RADIO_RETENTION 0x00000001
#define AR_PHY_RTT_CTRL_ENA_RADIO_RETENTION_S 0
#define AR_PHY_RTT_CTRL_RESTORE_MASK 0x0000007E
#define AR_PHY_RTT_CTRL_RESTORE_MASK_S 1
#define AR_PHY_RTT_CTRL_FORCE_RADIO_RESTORE 0x00000080
#define AR_PHY_RTT_CTRL_FORCE_RADIO_RESTORE_S 7
#define AR_PHY_RTT_SW_RTT_TABLE_ACCESS 0x00000001
#define AR_PHY_RTT_SW_RTT_TABLE_ACCESS_S 0
#define AR_PHY_RTT_SW_RTT_TABLE_WRITE 0x00000002
#define AR_PHY_RTT_SW_RTT_TABLE_WRITE_S 1
#define AR_PHY_RTT_SW_RTT_TABLE_ADDR 0x0000001C
#define AR_PHY_RTT_SW_RTT_TABLE_ADDR_S 2
#define AR_PHY_RTT_SW_RTT_TABLE_DATA 0xFFFFFFF0
#define AR_PHY_RTT_SW_RTT_TABLE_DATA_S 4
#define AR_PHY_TX_IQCAL_CONTROL_0_ENABLE_TXIQ_CAL 0x80000000
#define AR_PHY_TX_IQCAL_CONTROL_0_ENABLE_TXIQ_CAL_S 31
#define AR_PHY_TX_IQCAL_CONTROL_1_IQCORR_I_Q_COFF_DELPT 0x01fc0000
@ -919,6 +931,10 @@
#define AR_PHY_AIC_SRAM_ADDR_B1 (AR_SM1_BASE + 0x5f0)
#define AR_PHY_AIC_SRAM_DATA_B1 (AR_SM1_BASE + 0x5f4)
#define AR_PHY_RTT_TABLE_SW_INTF_B(i) (0x384 + (i) ? \
AR_SM1_BASE : AR_SM_BASE)
#define AR_PHY_RTT_TABLE_SW_INTF_1_B(i) (0x388 + (i) ? \
AR_SM1_BASE : AR_SM_BASE)
/*
* Channel 2 Register Map
*/

153
drivers/net/wireless/ath/ath9k/ar9003_rtt.c Normal file
View File

@ -0,0 +1,153 @@
/*
* Copyright (c) 2010-2011 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_phy.h"
#define RTT_RESTORE_TIMEOUT 1000
#define RTT_ACCESS_TIMEOUT 100
#define RTT_BAD_VALUE 0x0bad0bad
/*
* RTT (Radio Retention Table) hardware implementation information
*
* There is an internal table (i.e. the rtt) for each chain (or bank).
* Each table contains 6 entries and each entry is corresponding to
* a specific calibration parameter as depicted below.
* 0~2 - DC offset DAC calibration: loop, low, high (offsetI/Q_...)
* 3 - Filter cal (filterfc)
* 4 - RX gain settings
* 5 - Peak detector offset calibration (agc_caldac)
*/
void ar9003_hw_rtt_enable(struct ath_hw *ah)
{
REG_WRITE(ah, AR_PHY_RTT_CTRL, 1);
}
void ar9003_hw_rtt_disable(struct ath_hw *ah)
{
REG_WRITE(ah, AR_PHY_RTT_CTRL, 0);
}
void ar9003_hw_rtt_set_mask(struct ath_hw *ah, u32 rtt_mask)
{
REG_RMW_FIELD(ah, AR_PHY_RTT_CTRL,
AR_PHY_RTT_CTRL_RESTORE_MASK, rtt_mask);
}
bool ar9003_hw_rtt_force_restore(struct ath_hw *ah)
{
if (!ath9k_hw_wait(ah, AR_PHY_RTT_CTRL,
AR_PHY_RTT_CTRL_FORCE_RADIO_RESTORE,
0, RTT_RESTORE_TIMEOUT))
return false;
REG_RMW_FIELD(ah, AR_PHY_RTT_CTRL,
AR_PHY_RTT_CTRL_FORCE_RADIO_RESTORE, 1);
if (!ath9k_hw_wait(ah, AR_PHY_RTT_CTRL,
AR_PHY_RTT_CTRL_FORCE_RADIO_RESTORE,
0, RTT_RESTORE_TIMEOUT))
return false;
return true;
}
static void ar9003_hw_rtt_load_hist_entry(struct ath_hw *ah, u8 chain,
u32 index, u32 data28)
{
u32 val;
val = SM(data28, AR_PHY_RTT_SW_RTT_TABLE_DATA);
REG_WRITE(ah, AR_PHY_RTT_TABLE_SW_INTF_1_B(chain), val);
val = SM(0, AR_PHY_RTT_SW_RTT_TABLE_ACCESS) |
SM(1, AR_PHY_RTT_SW_RTT_TABLE_WRITE) |
SM(index, AR_PHY_RTT_SW_RTT_TABLE_ADDR);
REG_WRITE(ah, AR_PHY_RTT_TABLE_SW_INTF_B(chain), val);
udelay(1);
val |= SM(1, AR_PHY_RTT_SW_RTT_TABLE_ACCESS);
REG_WRITE(ah, AR_PHY_RTT_TABLE_SW_INTF_B(chain), val);
udelay(1);
if (!ath9k_hw_wait(ah, AR_PHY_RTT_TABLE_SW_INTF_B(chain),
AR_PHY_RTT_SW_RTT_TABLE_ACCESS, 0,
RTT_ACCESS_TIMEOUT))
return;
val &= ~SM(1, AR_PHY_RTT_SW_RTT_TABLE_WRITE);
REG_WRITE(ah, AR_PHY_RTT_TABLE_SW_INTF_B(chain), val);
udelay(1);
ath9k_hw_wait(ah, AR_PHY_RTT_TABLE_SW_INTF_B(chain),
AR_PHY_RTT_SW_RTT_TABLE_ACCESS, 0,
RTT_ACCESS_TIMEOUT);
}
void ar9003_hw_rtt_load_hist(struct ath_hw *ah, u8 chain, u32 *table)
{
int i;
for (i = 0; i < MAX_RTT_TABLE_ENTRY; i++)
ar9003_hw_rtt_load_hist_entry(ah, chain, i, table[i]);
}
static int ar9003_hw_rtt_fill_hist_entry(struct ath_hw *ah, u8 chain, u32 index)
{
u32 val;
val = SM(0, AR_PHY_RTT_SW_RTT_TABLE_ACCESS) |
SM(0, AR_PHY_RTT_SW_RTT_TABLE_WRITE) |
SM(index, AR_PHY_RTT_SW_RTT_TABLE_ADDR);
REG_WRITE(ah, AR_PHY_RTT_TABLE_SW_INTF_B(chain), val);
udelay(1);
val |= SM(1, AR_PHY_RTT_SW_RTT_TABLE_ACCESS);
REG_WRITE(ah, AR_PHY_RTT_TABLE_SW_INTF_B(chain), val);
udelay(1);
if (!ath9k_hw_wait(ah, AR_PHY_RTT_TABLE_SW_INTF_B(chain),
AR_PHY_RTT_SW_RTT_TABLE_ACCESS, 0,
RTT_ACCESS_TIMEOUT))
return RTT_BAD_VALUE;
val = REG_READ(ah, AR_PHY_RTT_TABLE_SW_INTF_1_B(chain));
return val;
}
void ar9003_hw_rtt_fill_hist(struct ath_hw *ah, u8 chain, u32 *table)
{
int i;
for (i = 0; i < MAX_RTT_TABLE_ENTRY; i++)
table[i] = ar9003_hw_rtt_fill_hist_entry(ah, chain, i);
}
void ar9003_hw_rtt_clear_hist(struct ath_hw *ah)
{
int i, j;
for (i = 0; i < AR9300_MAX_CHAINS; i++) {
if (!(ah->rxchainmask & (1 << i)))
continue;
for (j = 0; j < MAX_RTT_TABLE_ENTRY; j++)
ar9003_hw_rtt_load_hist_entry(ah, i, j, 0);
}
}

28
drivers/net/wireless/ath/ath9k/ar9003_rtt.h Normal file
View File

@ -0,0 +1,28 @@
/*
* Copyright (c) 2010-2011 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.
*/
#ifndef AR9003_RTT_H
#define AR9003_RTT_H
void ar9003_hw_rtt_enable(struct ath_hw *ah);
void ar9003_hw_rtt_disable(struct ath_hw *ah);
void ar9003_hw_rtt_set_mask(struct ath_hw *ah, u32 rtt_mask);
bool ar9003_hw_rtt_force_restore(struct ath_hw *ah);
void ar9003_hw_rtt_load_hist(struct ath_hw *ah, u8 chain, u32 *table);
void ar9003_hw_rtt_fill_hist(struct ath_hw *ah, u8 chain, u32 *table);
void ar9003_hw_rtt_clear_hist(struct ath_hw *ah);
#endif

4
drivers/net/wireless/ath/ath9k/hw.c
View File

@ -1709,6 +1709,7 @@ int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan,
if (caldata) {
caldata->done_txiqcal_once = false;
caldata->done_txclcal_once = false;
caldata->rtt_hist.num_readings = 0;
}
if (!ath9k_hw_init_cal(ah, chan))
return -EIO;
@ -2319,6 +2320,9 @@ int ath9k_hw_fill_cap_info(struct ath_hw *ah)
if (!AR_SREV_9330(ah))
ah->enabled_cals |= TX_IQ_ON_AGC_CAL;
}
if (AR_SREV_9480(ah))
pCap->hw_caps |= ATH9K_HW_CAP_RTT;
return 0;
}

9
drivers/net/wireless/ath/ath9k/hw.h
View File

@ -202,6 +202,7 @@ enum ath9k_hw_caps {
ATH9K_HW_CAP_2GHZ = BIT(13),
ATH9K_HW_CAP_5GHZ = BIT(14),
ATH9K_HW_CAP_APM = BIT(15),
ATH9K_HW_CAP_RTT = BIT(16),
};
struct ath9k_hw_capabilities {
@ -337,6 +338,13 @@ enum ath9k_int {
CHANNEL_HT40PLUS | \
CHANNEL_HT40MINUS)
#define MAX_RTT_TABLE_ENTRY 6
#define RTT_HIST_MAX 3
struct ath9k_rtt_hist {
u32 table[AR9300_MAX_CHAINS][RTT_HIST_MAX][MAX_RTT_TABLE_ENTRY];
u8 num_readings;
};
#define MAX_IQCAL_MEASUREMENT 8
#define MAX_CL_TAB_ENTRY 16
@ -357,6 +365,7 @@ struct ath9k_hw_cal_data {
int tx_corr_coeff[MAX_IQCAL_MEASUREMENT][AR9300_MAX_CHAINS];
u32 tx_clcal[AR9300_MAX_CHAINS][MAX_CL_TAB_ENTRY];
struct ath9k_nfcal_hist nfCalHist[NUM_NF_READINGS];
struct ath9k_rtt_hist rtt_hist;
};
struct ath9k_channel {

1
drivers/net/wireless/ath/ath9k/reg.h
View File

@ -1933,6 +1933,7 @@ enum {
#define AR_PHY_AGC_CONTROL_NO_UPDATE_NF 0x00020000 /* don't update noise floor automatically */
#define AR_PHY_AGC_CONTROL_EXT_NF_PWR_MEAS 0x00040000 /* extend noise floor power measurement */
#define AR_PHY_AGC_CONTROL_CLC_SUCCESS 0x00080000 /* carrier leak calibration done */
#define AR_PHY_AGC_CONTROL_PKDET_CAL 0x00100000
#define AR_PHY_AGC_CONTROL_YCOK_MAX 0x000003c0
#define AR_PHY_AGC_CONTROL_YCOK_MAX_S 6