Commit 324c74ad authored by Rajkumar Manoharan's avatar Rajkumar Manoharan Committed by John W. Linville
Browse files

ath9k_hw: Add radio retention support for AR9480 



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

Signed-off-by: default avatarRajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 1aef40b8

drivers/net/wireless/ath/ath9k/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -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 \

drivers/net/wireless/ath/ath9k/ar9003_calib.c

+102 −13
Original line number Diff line number Diff line
@@ -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:



	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 */

	if (!ath9k_hw_wait(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL,

			   0, AH_WAIT_TIMEOUT)) {

		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 @@ static bool ar9003_hw_init_cal(struct ath_hw *ah, 
	}

#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);

drivers/net/wireless/ath/ath9k/ar9003_phy.h

+18 −2
Original line number Diff line number Diff line
@@ -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

 */

drivers/net/wireless/ath/ath9k/ar9003_rtt.c

0 → 100644
+153 −0
Original line number Diff line number Diff line 
/*

 * 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);

	}

}

drivers/net/wireless/ath/ath9k/ar9003_rtt.h

0 → 100644
+28 −0
Original line number Diff line number Diff line 
/*

 * 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