[deliverable/linux.git] / drivers / net / wireless / ath / ath9k / ar9003_wow.c

/*
 * Copyright (c) 2012 Qualcomm Atheros, 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 <linux/export.h>
#include "ath9k.h"
#include "reg.h"
#include "reg_wow.h"
#include "hw-ops.h"

static void ath9k_hw_set_powermode_wow_sleep(struct ath_hw *ah)
{
	struct ath_common *common = ath9k_hw_common(ah);

	REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);

	/* set rx disable bit */
	REG_WRITE(ah, AR_CR, AR_CR_RXD);

	if (!ath9k_hw_wait(ah, AR_CR, AR_CR_RXE, 0, AH_WAIT_TIMEOUT)) {
		ath_err(common, "Failed to stop Rx DMA in 10ms AR_CR=0x%08x AR_DIAG_SW=0x%08x\n",
			REG_READ(ah, AR_CR), REG_READ(ah, AR_DIAG_SW));
		return;
	}

	REG_WRITE(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_ON_INT);
}

static void ath9k_wow_create_keep_alive_pattern(struct ath_hw *ah)
{
	struct ath_common *common = ath9k_hw_common(ah);
	u8 sta_mac_addr[ETH_ALEN], ap_mac_addr[ETH_ALEN];
	u32 ctl[13] = {0};
	u32 data_word[KAL_NUM_DATA_WORDS];
	u8 i;
	u32 wow_ka_data_word0;

	memcpy(sta_mac_addr, common->macaddr, ETH_ALEN);
	memcpy(ap_mac_addr, common->curbssid, ETH_ALEN);

	/* set the transmit buffer */
	ctl[0] = (KAL_FRAME_LEN | (MAX_RATE_POWER << 16));
	ctl[1] = 0;
	ctl[3] = 0xb;	/* OFDM_6M hardware value for this rate */
	ctl[4] = 0;
	ctl[7] = (ah->txchainmask) << 2;
	ctl[2] = 0xf << 16; /* tx_tries 0 */

	for (i = 0; i < KAL_NUM_DESC_WORDS; i++)
		REG_WRITE(ah, (AR_WOW_KA_DESC_WORD2 + i * 4), ctl[i]);

	REG_WRITE(ah, (AR_WOW_KA_DESC_WORD2 + i * 4), ctl[i]);

	data_word[0] = (KAL_FRAME_TYPE << 2) | (KAL_FRAME_SUB_TYPE << 4) |
		       (KAL_TO_DS << 8) | (KAL_DURATION_ID << 16);
	data_word[1] = (ap_mac_addr[3] << 24) | (ap_mac_addr[2] << 16) |
		       (ap_mac_addr[1] << 8) | (ap_mac_addr[0]);
	data_word[2] = (sta_mac_addr[1] << 24) | (sta_mac_addr[0] << 16) |
		       (ap_mac_addr[5] << 8) | (ap_mac_addr[4]);
	data_word[3] = (sta_mac_addr[5] << 24) | (sta_mac_addr[4] << 16) |
		       (sta_mac_addr[3] << 8) | (sta_mac_addr[2]);
	data_word[4] = (ap_mac_addr[3] << 24) | (ap_mac_addr[2] << 16) |
		       (ap_mac_addr[1] << 8) | (ap_mac_addr[0]);
	data_word[5] = (ap_mac_addr[5] << 8) | (ap_mac_addr[4]);

	if (AR_SREV_9462_20(ah)) {
		/* AR9462 2.0 has an extra descriptor word (time based
		 * discard) compared to other chips */
		REG_WRITE(ah, (AR_WOW_KA_DESC_WORD2 + (12 * 4)), 0);
		wow_ka_data_word0 = AR_WOW_TXBUF(13);
	} else {
		wow_ka_data_word0 = AR_WOW_TXBUF(12);
	}

	for (i = 0; i < KAL_NUM_DATA_WORDS; i++)
		REG_WRITE(ah, (wow_ka_data_word0 + i*4), data_word[i]);

}

int ath9k_hw_wow_apply_pattern(struct ath_hw *ah, u8 *user_pattern,
			       u8 *user_mask, int pattern_count,
			       int pattern_len)
{
	int i;
	u32 pattern_val, mask_val;
	u32 set, clr;

	if (pattern_count >= ah->wow.max_patterns)
		return -ENOSPC;

	if (pattern_count < MAX_NUM_PATTERN_LEGACY)
		REG_SET_BIT(ah, AR_WOW_PATTERN, BIT(pattern_count));
	else
		REG_SET_BIT(ah, AR_MAC_PCU_WOW4, BIT(pattern_count - 8));

	for (i = 0; i < MAX_PATTERN_SIZE; i += 4) {
		memcpy(&pattern_val, user_pattern, 4);
		REG_WRITE(ah, (AR_WOW_TB_PATTERN(pattern_count) + i),
			  pattern_val);
		user_pattern += 4;
	}

	for (i = 0; i < MAX_PATTERN_MASK_SIZE; i += 4) {
		memcpy(&mask_val, user_mask, 4);
		REG_WRITE(ah, (AR_WOW_TB_MASK(pattern_count) + i), mask_val);
		user_mask += 4;
	}

	if (pattern_count < MAX_NUM_PATTERN_LEGACY)
		ah->wow.wow_event_mask |=
			BIT(pattern_count + AR_WOW_PAT_FOUND_SHIFT);
	else
		ah->wow.wow_event_mask2 |=
			BIT((pattern_count - 8) + AR_WOW_PAT_FOUND_SHIFT);

	if (pattern_count < 4) {
		set = (pattern_len & AR_WOW_LENGTH_MAX) <<
		       AR_WOW_LEN1_SHIFT(pattern_count);
		clr = AR_WOW_LENGTH1_MASK(pattern_count);
		REG_RMW(ah, AR_WOW_LENGTH1, set, clr);
	} else if (pattern_count < 8) {
		set = (pattern_len & AR_WOW_LENGTH_MAX) <<
		       AR_WOW_LEN2_SHIFT(pattern_count);
		clr = AR_WOW_LENGTH2_MASK(pattern_count);
		REG_RMW(ah, AR_WOW_LENGTH2, set, clr);
	} else if (pattern_count < 12) {
		set = (pattern_len & AR_WOW_LENGTH_MAX) <<
		       AR_WOW_LEN3_SHIFT(pattern_count);
		clr = AR_WOW_LENGTH3_MASK(pattern_count);
		REG_RMW(ah, AR_WOW_LENGTH3, set, clr);
	} else if (pattern_count < MAX_NUM_PATTERN) {
		set = (pattern_len & AR_WOW_LENGTH_MAX) <<
		       AR_WOW_LEN4_SHIFT(pattern_count);
		clr = AR_WOW_LENGTH4_MASK(pattern_count);
		REG_RMW(ah, AR_WOW_LENGTH4, set, clr);
	}

	return 0;
}
EXPORT_SYMBOL(ath9k_hw_wow_apply_pattern);

u32 ath9k_hw_wow_wakeup(struct ath_hw *ah)
{
	u32 wow_status = 0;
	u32 val = 0, rval;

	/*
	 * read the WoW status register to know
	 * the wakeup reason
	 */
	rval = REG_READ(ah, AR_WOW_PATTERN);
	val = AR_WOW_STATUS(rval);

	/*
	 * mask only the WoW events that we have enabled. Sometimes
	 * we have spurious WoW events from the AR_WOW_PATTERN
	 * register. This mask will clean it up.
	 */

	val &= ah->wow.wow_event_mask;

	if (val) {
		if (val & AR_WOW_MAGIC_PAT_FOUND)
			wow_status |= AH_WOW_MAGIC_PATTERN_EN;
		if (AR_WOW_PATTERN_FOUND(val))
			wow_status |= AH_WOW_USER_PATTERN_EN;
		if (val & AR_WOW_KEEP_ALIVE_FAIL)
			wow_status |= AH_WOW_LINK_CHANGE;
		if (val & AR_WOW_BEACON_FAIL)
			wow_status |= AH_WOW_BEACON_MISS;
	}

	/*
	 * set and clear WOW_PME_CLEAR registers for the chip to
	 * generate next wow signal.
	 * disable D3 before accessing other registers ?
	 */

	/* do we need to check the bit value 0x01000000 (7-10) ?? */
	REG_RMW(ah, AR_PCIE_PM_CTRL, AR_PMCTRL_WOW_PME_CLR,
		AR_PMCTRL_PWR_STATE_D1D3);

	/*
	 * clear all events
	 */
	REG_WRITE(ah, AR_WOW_PATTERN,
		  AR_WOW_CLEAR_EVENTS(REG_READ(ah, AR_WOW_PATTERN)));

	/*
	 * restore the beacon threshold to init value
	 */
	REG_WRITE(ah, AR_RSSI_THR, INIT_RSSI_THR);

	/*
	 * Restore the way the PCI-E reset, Power-On-Reset, external
	 * PCIE_POR_SHORT pins are tied to its original value.
	 * Previously just before WoW sleep, we untie the PCI-E
	 * reset to our Chip's Power On Reset so that any PCI-E
	 * reset from the bus will not reset our chip
	 */
	if (ah->is_pciexpress)
		ath9k_hw_configpcipowersave(ah, false);

	ah->wow.wow_event_mask = 0;

	return wow_status;
}
EXPORT_SYMBOL(ath9k_hw_wow_wakeup);

static void ath9k_hw_wow_set_arwr_reg(struct ath_hw *ah)
{
	u32 wa_reg;

	if (!ah->is_pciexpress)
		return;

	/*
	 * We need to untie the internal POR (power-on-reset)
	 * to the external PCI-E reset. We also need to tie
	 * the PCI-E Phy reset to the PCI-E reset.
	 */
	wa_reg = REG_READ(ah, AR_WA);
	wa_reg &= ~AR_WA_UNTIE_RESET_EN;
	wa_reg |= AR_WA_RESET_EN;
	wa_reg |= AR_WA_POR_SHORT;

	REG_WRITE(ah, AR_WA, wa_reg);
}

void ath9k_hw_wow_enable(struct ath_hw *ah, u32 pattern_enable)
{
	u32 wow_event_mask;
	u32 keep_alive, magic_pattern, host_pm_ctrl;

	wow_event_mask = ah->wow.wow_event_mask;

	/*
	 * AR_PMCTRL_HOST_PME_EN - Override PME enable in configuration
	 *                         space and allow MAC to generate WoW anyway.
	 *
	 * AR_PMCTRL_PWR_PM_CTRL_ENA - ???
	 *
	 * AR_PMCTRL_AUX_PWR_DET - PCI core SYS_AUX_PWR_DET signal,
	 *                         needs to be set for WoW in PCI mode.
	 *
	 * AR_PMCTRL_WOW_PME_CLR - WoW Clear Signal going to the MAC.
	 *
	 * Set the power states appropriately and enable PME.
	 *
	 * Set and clear WOW_PME_CLEAR for the chip
	 * to generate next wow signal.
	 */
	REG_SET_BIT(ah, AR_PCIE_PM_CTRL, AR_PMCTRL_HOST_PME_EN |
		    			 AR_PMCTRL_PWR_PM_CTRL_ENA |
		    			 AR_PMCTRL_AUX_PWR_DET |
		    			 AR_PMCTRL_WOW_PME_CLR);
	REG_CLR_BIT(ah, AR_PCIE_PM_CTRL, AR_PMCTRL_WOW_PME_CLR);

	/*
	 * Random Backoff.
	 *
	 * 31:28 in AR_WOW_PATTERN : Indicates the number of bits used in the
	 *                           contention window. For value N,
	 *                           the random backoff will be selected between
	 *                           0 and (2 ^ N) - 1.
	 */
	REG_SET_BIT(ah, AR_WOW_PATTERN,
		    AR_WOW_BACK_OFF_SHIFT(AR_WOW_PAT_BACKOFF));

	/*
	 * AIFS time, Slot time, Keep Alive count.
	 */
	REG_SET_BIT(ah, AR_WOW_COUNT, AR_WOW_AIFS_CNT(AR_WOW_CNT_AIFS_CNT) |
		    		      AR_WOW_SLOT_CNT(AR_WOW_CNT_SLOT_CNT) |
		    		      AR_WOW_KEEP_ALIVE_CNT(AR_WOW_CNT_KA_CNT));
	/*
	 * Beacon timeout.
	 */
	if (pattern_enable & AH_WOW_BEACON_MISS)
		REG_WRITE(ah, AR_WOW_BCN_TIMO, AR_WOW_BEACON_TIMO);
	else
		REG_WRITE(ah, AR_WOW_BCN_TIMO, AR_WOW_BEACON_TIMO_MAX);

	/*
	 * Keep alive timeout in ms.
	 */
	if (!pattern_enable)
		REG_WRITE(ah, AR_WOW_KEEP_ALIVE_TIMO, AR_WOW_KEEP_ALIVE_NEVER);
	else
		REG_WRITE(ah, AR_WOW_KEEP_ALIVE_TIMO, KAL_TIMEOUT * 32);

	/*
	 * Keep alive delay in us.
	 */
	REG_WRITE(ah, AR_WOW_KEEP_ALIVE_DELAY, KAL_DELAY * 1000);

	/*
	 * Create keep alive pattern to respond to beacons.
	 */
	ath9k_wow_create_keep_alive_pattern(ah);

	/*
	 * Configure keep alive register.
	 */
	keep_alive = REG_READ(ah, AR_WOW_KEEP_ALIVE);

	/* Send keep alive timeouts anyway */
	keep_alive &= ~AR_WOW_KEEP_ALIVE_AUTO_DIS;

	if (pattern_enable & AH_WOW_LINK_CHANGE) {
		keep_alive &= ~AR_WOW_KEEP_ALIVE_FAIL_DIS;
		wow_event_mask |= AR_WOW_KEEP_ALIVE_FAIL;
	} else {
		keep_alive |= AR_WOW_KEEP_ALIVE_FAIL_DIS;
	}

	REG_WRITE(ah, AR_WOW_KEEP_ALIVE, keep_alive);

	/*
	 * We are relying on a bmiss failure, ensure we have
	 * enough threshold to prevent false positives.
	 */
	REG_RMW_FIELD(ah, AR_RSSI_THR, AR_RSSI_THR_BM_THR,
		      AR_WOW_BMISSTHRESHOLD);

	if (pattern_enable & AH_WOW_BEACON_MISS) {
		wow_event_mask |= AR_WOW_BEACON_FAIL;
		REG_SET_BIT(ah, AR_WOW_BCN_EN, AR_WOW_BEACON_FAIL_EN);
	} else {
		REG_CLR_BIT(ah, AR_WOW_BCN_EN, AR_WOW_BEACON_FAIL_EN);
	}

	/*
	 * Enable the magic packet registers.
	 */
	magic_pattern = REG_READ(ah, AR_WOW_PATTERN);
	magic_pattern |= AR_WOW_MAC_INTR_EN;

	if (pattern_enable & AH_WOW_MAGIC_PATTERN_EN) {
		magic_pattern |= AR_WOW_MAGIC_EN;
		wow_event_mask |= AR_WOW_MAGIC_PAT_FOUND;
	} else {
		magic_pattern &= ~AR_WOW_MAGIC_EN;
	}

	REG_WRITE(ah, AR_WOW_PATTERN, magic_pattern);

	/*
	 * Enable pattern matching for packets which are less
	 * than 256 bytes.
	 */
	REG_WRITE(ah, AR_WOW_PATTERN_MATCH_LT_256B,
		  AR_WOW_PATTERN_SUPPORTED);

	/*
	 * Set the power states appropriately and enable PME.
	 */
	host_pm_ctrl = REG_READ(ah, AR_PCIE_PM_CTRL);
	host_pm_ctrl |= AR_PMCTRL_PWR_STATE_D1D3 |
			AR_PMCTRL_HOST_PME_EN |
			AR_PMCTRL_PWR_PM_CTRL_ENA;
	host_pm_ctrl &= ~AR_PCIE_PM_CTRL_ENA;

	if (AR_SREV_9462(ah)) {
		/*
		 * This is needed to prevent the chip waking up
		 * the host within 3-4 seconds with certain
		 * platform/BIOS.
		 */
		host_pm_ctrl &= ~AR_PMCTRL_PWR_STATE_D1D3;
		host_pm_ctrl |= AR_PMCTRL_PWR_STATE_D1D3_REAL;
	}

	REG_WRITE(ah, AR_PCIE_PM_CTRL, host_pm_ctrl);

	/*
	 * Enable sequence number generation when asleep.
	 */
	REG_CLR_BIT(ah, AR_STA_ID1, AR_STA_ID1_PRESERVE_SEQNUM);

	/* To bring down WOW power low margin */
	REG_SET_BIT(ah, AR_PCIE_PHY_REG3, BIT(13));

	ath9k_hw_wow_set_arwr_reg(ah);

	/* HW WoW */
	REG_CLR_BIT(ah, AR_PCU_MISC_MODE3, BIT(5));

	ath9k_hw_set_powermode_wow_sleep(ah);
	ah->wow.wow_event_mask = wow_event_mask;
}
EXPORT_SYMBOL(ath9k_hw_wow_enable);
Commit	Line	Data
64875c63 MSS	1	/*
	2	* Copyright (c) 2012 Qualcomm Atheros, Inc.
	3	*
	4	* Permission to use, copy, modify, and/or distribute this software for any
	5	* purpose with or without fee is hereby granted, provided that the above
	6	* copyright notice and this permission notice appear in all copies.
	7	*
	8	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	9	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	10	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	11	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	12	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	13	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	14	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	15	*/
	16
	17	#include <linux/export.h>
	18	#include "ath9k.h"
	19	#include "reg.h"
ce6e982b	20	#include "reg_wow.h"
64875c63 MSS	21	#include "hw-ops.h"
64875c63 MSS	22
64875c63 MSS	23	static void ath9k_hw_set_powermode_wow_sleep(struct ath_hw *ah)
	24	{
	25	struct ath_common *common = ath9k_hw_common(ah);
	26
	27	REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);
	28
	29	/* set rx disable bit */
	30	REG_WRITE(ah, AR_CR, AR_CR_RXD);
	31
	32	if (!ath9k_hw_wait(ah, AR_CR, AR_CR_RXE, 0, AH_WAIT_TIMEOUT)) {
	33	ath_err(common, "Failed to stop Rx DMA in 10ms AR_CR=0x%08x AR_DIAG_SW=0x%08x\n",
	34	REG_READ(ah, AR_CR), REG_READ(ah, AR_DIAG_SW));
	35	return;
64875c63 MSS	36	}
64875c63 MSS	37
64875c63 MSS	38	REG_WRITE(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_ON_INT);
	39	}
	40
	41	static void ath9k_wow_create_keep_alive_pattern(struct ath_hw *ah)
	42	{
	43	struct ath_common *common = ath9k_hw_common(ah);
	44	u8 sta_mac_addr[ETH_ALEN], ap_mac_addr[ETH_ALEN];
	45	u32 ctl[13] = {0};
	46	u32 data_word[KAL_NUM_DATA_WORDS];
	47	u8 i;
	48	u32 wow_ka_data_word0;
	49
	50	memcpy(sta_mac_addr, common->macaddr, ETH_ALEN);
	51	memcpy(ap_mac_addr, common->curbssid, ETH_ALEN);
	52
	53	/* set the transmit buffer */
	54	ctl[0] = (KAL_FRAME_LEN \| (MAX_RATE_POWER << 16));
64875c63 MSS	55	ctl[1] = 0;
	56	ctl[3] = 0xb; /* OFDM_6M hardware value for this rate */
	57	ctl[4] = 0;
	58	ctl[7] = (ah->txchainmask) << 2;
846e438f	59	ctl[2] = 0xf << 16; /* tx_tries 0 */
64875c63 MSS	60
	61	for (i = 0; i < KAL_NUM_DESC_WORDS; i++)
	62	REG_WRITE(ah, (AR_WOW_KA_DESC_WORD2 + i * 4), ctl[i]);
	63
846e438f	64	REG_WRITE(ah, (AR_WOW_KA_DESC_WORD2 + i * 4), ctl[i]);
64875c63 MSS	65
	66	data_word[0] = (KAL_FRAME_TYPE << 2) \| (KAL_FRAME_SUB_TYPE << 4) \|
	67	(KAL_TO_DS << 8) \| (KAL_DURATION_ID << 16);
	68	data_word[1] = (ap_mac_addr[3] << 24) \| (ap_mac_addr[2] << 16) \|
	69	(ap_mac_addr[1] << 8) \| (ap_mac_addr[0]);
	70	data_word[2] = (sta_mac_addr[1] << 24) \| (sta_mac_addr[0] << 16) \|
	71	(ap_mac_addr[5] << 8) \| (ap_mac_addr[4]);
	72	data_word[3] = (sta_mac_addr[5] << 24) \| (sta_mac_addr[4] << 16) \|
	73	(sta_mac_addr[3] << 8) \| (sta_mac_addr[2]);
	74	data_word[4] = (ap_mac_addr[3] << 24) \| (ap_mac_addr[2] << 16) \|
	75	(ap_mac_addr[1] << 8) \| (ap_mac_addr[0]);
	76	data_word[5] = (ap_mac_addr[5] << 8) \| (ap_mac_addr[4]);
	77
506ed95c	78	if (AR_SREV_9462_20(ah)) {
64875c63 MSS	79	/* AR9462 2.0 has an extra descriptor word (time based
	80	* discard) compared to other chips */
	81	REG_WRITE(ah, (AR_WOW_KA_DESC_WORD2 + (12 * 4)), 0);
	82	wow_ka_data_word0 = AR_WOW_TXBUF(13);
	83	} else {
	84	wow_ka_data_word0 = AR_WOW_TXBUF(12);
	85	}
	86
	87	for (i = 0; i < KAL_NUM_DATA_WORDS; i++)
	88	REG_WRITE(ah, (wow_ka_data_word0 + i*4), data_word[i]);
	89
	90	}
	91
6af75e4d SM	92	int ath9k_hw_wow_apply_pattern(struct ath_hw ah, u8 user_pattern,
	93	u8 *user_mask, int pattern_count,
	94	int pattern_len)
64875c63 MSS	95	{
	96	int i;
	97	u32 pattern_val, mask_val;
	98	u32 set, clr;
	99
6af75e4d SM	100	if (pattern_count >= ah->wow.max_patterns)
6af75e4d SM	101	return -ENOSPC;
64875c63	102
a28815db SM	103	if (pattern_count < MAX_NUM_PATTERN_LEGACY)
	104	REG_SET_BIT(ah, AR_WOW_PATTERN, BIT(pattern_count));
	105	else
	106	REG_SET_BIT(ah, AR_MAC_PCU_WOW4, BIT(pattern_count - 8));
64875c63	107
64875c63 MSS	108	for (i = 0; i < MAX_PATTERN_SIZE; i += 4) {
	109	memcpy(&pattern_val, user_pattern, 4);
	110	REG_WRITE(ah, (AR_WOW_TB_PATTERN(pattern_count) + i),
	111	pattern_val);
	112	user_pattern += 4;
	113	}
	114
64875c63 MSS	115	for (i = 0; i < MAX_PATTERN_MASK_SIZE; i += 4) {
	116	memcpy(&mask_val, user_mask, 4);
	117	REG_WRITE(ah, (AR_WOW_TB_MASK(pattern_count) + i), mask_val);
	118	user_mask += 4;
	119	}
	120
a28815db SM	121	if (pattern_count < MAX_NUM_PATTERN_LEGACY)
	122	ah->wow.wow_event_mask \|=
	123	BIT(pattern_count + AR_WOW_PAT_FOUND_SHIFT);
	124	else
	125	ah->wow.wow_event_mask2 \|=
	126	BIT((pattern_count - 8) + AR_WOW_PAT_FOUND_SHIFT);
64875c63	127
64875c63	128	if (pattern_count < 4) {
64875c63 MSS	129	set = (pattern_len & AR_WOW_LENGTH_MAX) <<
	130	AR_WOW_LEN1_SHIFT(pattern_count);
	131	clr = AR_WOW_LENGTH1_MASK(pattern_count);
	132	REG_RMW(ah, AR_WOW_LENGTH1, set, clr);
a28815db	133	} else if (pattern_count < 8) {
64875c63 MSS	134	set = (pattern_len & AR_WOW_LENGTH_MAX) <<
	135	AR_WOW_LEN2_SHIFT(pattern_count);
	136	clr = AR_WOW_LENGTH2_MASK(pattern_count);
	137	REG_RMW(ah, AR_WOW_LENGTH2, set, clr);
a28815db SM	138	} else if (pattern_count < 12) {
	139	set = (pattern_len & AR_WOW_LENGTH_MAX) <<
	140	AR_WOW_LEN3_SHIFT(pattern_count);
	141	clr = AR_WOW_LENGTH3_MASK(pattern_count);
	142	REG_RMW(ah, AR_WOW_LENGTH3, set, clr);
	143	} else if (pattern_count < MAX_NUM_PATTERN) {
	144	set = (pattern_len & AR_WOW_LENGTH_MAX) <<
	145	AR_WOW_LEN4_SHIFT(pattern_count);
	146	clr = AR_WOW_LENGTH4_MASK(pattern_count);
	147	REG_RMW(ah, AR_WOW_LENGTH4, set, clr);
64875c63 MSS	148	}
64875c63 MSS	149
6af75e4d	150	return 0;
64875c63 MSS	151	}
	152	EXPORT_SYMBOL(ath9k_hw_wow_apply_pattern);
	153
	154	u32 ath9k_hw_wow_wakeup(struct ath_hw *ah)
	155	{
	156	u32 wow_status = 0;
	157	u32 val = 0, rval;
846e438f	158
64875c63 MSS	159	/*
	160	* read the WoW status register to know
	161	* the wakeup reason
	162	*/
	163	rval = REG_READ(ah, AR_WOW_PATTERN);
	164	val = AR_WOW_STATUS(rval);
	165
	166	/*
	167	* mask only the WoW events that we have enabled. Sometimes
	168	* we have spurious WoW events from the AR_WOW_PATTERN
	169	* register. This mask will clean it up.
	170	*/
	171
41fe8837	172	val &= ah->wow.wow_event_mask;
64875c63 MSS	173
64875c63 MSS	174	if (val) {
64875c63 MSS	175	if (val & AR_WOW_MAGIC_PAT_FOUND)
64875c63 MSS	176	wow_status \|= AH_WOW_MAGIC_PATTERN_EN;
64875c63 MSS	177	if (AR_WOW_PATTERN_FOUND(val))
64875c63 MSS	178	wow_status \|= AH_WOW_USER_PATTERN_EN;
64875c63 MSS	179	if (val & AR_WOW_KEEP_ALIVE_FAIL)
64875c63 MSS	180	wow_status \|= AH_WOW_LINK_CHANGE;
64875c63 MSS	181	if (val & AR_WOW_BEACON_FAIL)
64875c63 MSS	182	wow_status \|= AH_WOW_BEACON_MISS;
64875c63 MSS	183	}
	184
	185	/*
	186	* set and clear WOW_PME_CLEAR registers for the chip to
	187	* generate next wow signal.
	188	* disable D3 before accessing other registers ?
	189	*/
	190
	191	/* do we need to check the bit value 0x01000000 (7-10) ?? */
	192	REG_RMW(ah, AR_PCIE_PM_CTRL, AR_PMCTRL_WOW_PME_CLR,
	193	AR_PMCTRL_PWR_STATE_D1D3);
	194
	195	/*
	196	* clear all events
	197	*/
	198	REG_WRITE(ah, AR_WOW_PATTERN,
	199	AR_WOW_CLEAR_EVENTS(REG_READ(ah, AR_WOW_PATTERN)));
	200
64875c63 MSS	201	/*
	202	* restore the beacon threshold to init value
	203	*/
	204	REG_WRITE(ah, AR_RSSI_THR, INIT_RSSI_THR);
	205
	206	/*
	207	* Restore the way the PCI-E reset, Power-On-Reset, external
	208	* PCIE_POR_SHORT pins are tied to its original value.
	209	* Previously just before WoW sleep, we untie the PCI-E
	210	* reset to our Chip's Power On Reset so that any PCI-E
	211	* reset from the bus will not reset our chip
	212	*/
846e438f	213	if (ah->is_pciexpress)
64875c63 MSS	214	ath9k_hw_configpcipowersave(ah, false);
64875c63 MSS	215
41fe8837	216	ah->wow.wow_event_mask = 0;
64875c63 MSS	217
	218	return wow_status;
	219	}
	220	EXPORT_SYMBOL(ath9k_hw_wow_wakeup);
	221
b6f68b1e SM	222	static void ath9k_hw_wow_set_arwr_reg(struct ath_hw *ah)
	223	{
	224	u32 wa_reg;
	225
	226	if (!ah->is_pciexpress)
	227	return;
	228
	229	/*
	230	* We need to untie the internal POR (power-on-reset)
	231	* to the external PCI-E reset. We also need to tie
	232	* the PCI-E Phy reset to the PCI-E reset.
	233	*/
	234	wa_reg = REG_READ(ah, AR_WA);
	235	wa_reg &= ~AR_WA_UNTIE_RESET_EN;
	236	wa_reg \|= AR_WA_RESET_EN;
	237	wa_reg \|= AR_WA_POR_SHORT;
	238
	239	REG_WRITE(ah, AR_WA, wa_reg);
	240	}
	241
64875c63 MSS	242	void ath9k_hw_wow_enable(struct ath_hw *ah, u32 pattern_enable)
	243	{
	244	u32 wow_event_mask;
bb631314	245	u32 keep_alive, magic_pattern, host_pm_ctrl;
64875c63	246
41fe8837	247	wow_event_mask = ah->wow.wow_event_mask;
64875c63	248
64875c63	249	/*
bb631314 SM	250	* AR_PMCTRL_HOST_PME_EN - Override PME enable in configuration
	251	* space and allow MAC to generate WoW anyway.
	252	*
	253	* AR_PMCTRL_PWR_PM_CTRL_ENA - ???
	254	*
	255	* AR_PMCTRL_AUX_PWR_DET - PCI core SYS_AUX_PWR_DET signal,
	256	* needs to be set for WoW in PCI mode.
	257	*
	258	* AR_PMCTRL_WOW_PME_CLR - WoW Clear Signal going to the MAC.
	259	*
	260	* Set the power states appropriately and enable PME.
	261	*
	262	* Set and clear WOW_PME_CLEAR for the chip
	263	* to generate next wow signal.
64875c63	264	*/
bb631314 SM	265	REG_SET_BIT(ah, AR_PCIE_PM_CTRL, AR_PMCTRL_HOST_PME_EN \|
	266	AR_PMCTRL_PWR_PM_CTRL_ENA \|
	267	AR_PMCTRL_AUX_PWR_DET \|
	268	AR_PMCTRL_WOW_PME_CLR);
	269	REG_CLR_BIT(ah, AR_PCIE_PM_CTRL, AR_PMCTRL_WOW_PME_CLR);
64875c63 MSS	270
64875c63 MSS	271	/*
bb631314 SM	272	* Random Backoff.
	273	*
	274	* 31:28 in AR_WOW_PATTERN : Indicates the number of bits used in the
	275	* contention window. For value N,
	276	* the random backoff will be selected between
	277	* 0 and (2 ^ N) - 1.
64875c63	278	*/
bb631314 SM	279	REG_SET_BIT(ah, AR_WOW_PATTERN,
bb631314 SM	280	AR_WOW_BACK_OFF_SHIFT(AR_WOW_PAT_BACKOFF));
64875c63 MSS	281
64875c63 MSS	282	/*
bb631314	283	* AIFS time, Slot time, Keep Alive count.
64875c63	284	*/
bb631314 SM	285	REG_SET_BIT(ah, AR_WOW_COUNT, AR_WOW_AIFS_CNT(AR_WOW_CNT_AIFS_CNT) \|
	286	AR_WOW_SLOT_CNT(AR_WOW_CNT_SLOT_CNT) \|
	287	AR_WOW_KEEP_ALIVE_CNT(AR_WOW_CNT_KA_CNT));
64875c63	288	/*
bb631314	289	* Beacon timeout.
64875c63	290	*/
64875c63	291	if (pattern_enable & AH_WOW_BEACON_MISS)
bb631314	292	REG_WRITE(ah, AR_WOW_BCN_TIMO, AR_WOW_BEACON_TIMO);
64875c63	293	else
bb631314	294	REG_WRITE(ah, AR_WOW_BCN_TIMO, AR_WOW_BEACON_TIMO_MAX);
64875c63 MSS	295
64875c63 MSS	296	/*
bb631314	297	* Keep alive timeout in ms.
64875c63	298	*/
846e438f	299	if (!pattern_enable)
bb631314	300	REG_WRITE(ah, AR_WOW_KEEP_ALIVE_TIMO, AR_WOW_KEEP_ALIVE_NEVER);
64875c63	301	else
bb631314	302	REG_WRITE(ah, AR_WOW_KEEP_ALIVE_TIMO, KAL_TIMEOUT * 32);
64875c63 MSS	303
64875c63 MSS	304	/*
bb631314	305	* Keep alive delay in us.
64875c63	306	*/
bb631314	307	REG_WRITE(ah, AR_WOW_KEEP_ALIVE_DELAY, KAL_DELAY * 1000);
64875c63 MSS	308
64875c63 MSS	309	/*
bb631314	310	* Create keep alive pattern to respond to beacons.
64875c63 MSS	311	*/
	312	ath9k_wow_create_keep_alive_pattern(ah);
	313
	314	/*
bb631314	315	* Configure keep alive register.
64875c63	316	*/
bb631314 SM	317	keep_alive = REG_READ(ah, AR_WOW_KEEP_ALIVE);
bb631314 SM	318
64875c63	319	/* Send keep alive timeouts anyway */
bb631314	320	keep_alive &= ~AR_WOW_KEEP_ALIVE_AUTO_DIS;
64875c63	321
bb631314 SM	322	if (pattern_enable & AH_WOW_LINK_CHANGE) {
bb631314 SM	323	keep_alive &= ~AR_WOW_KEEP_ALIVE_FAIL_DIS;
64875c63	324	wow_event_mask \|= AR_WOW_KEEP_ALIVE_FAIL;
bb631314 SM	325	} else {
	326	keep_alive \|= AR_WOW_KEEP_ALIVE_FAIL_DIS;
	327	}
64875c63	328
bb631314	329	REG_WRITE(ah, AR_WOW_KEEP_ALIVE, keep_alive);
64875c63	330
64875c63	331	/*
bb631314 SM	332	* We are relying on a bmiss failure, ensure we have
bb631314 SM	333	* enough threshold to prevent false positives.
64875c63 MSS	334	*/
	335	REG_RMW_FIELD(ah, AR_RSSI_THR, AR_RSSI_THR_BM_THR,
	336	AR_WOW_BMISSTHRESHOLD);
	337
64875c63	338	if (pattern_enable & AH_WOW_BEACON_MISS) {
64875c63	339	wow_event_mask \|= AR_WOW_BEACON_FAIL;
bb631314	340	REG_SET_BIT(ah, AR_WOW_BCN_EN, AR_WOW_BEACON_FAIL_EN);
64875c63	341	} else {
bb631314	342	REG_CLR_BIT(ah, AR_WOW_BCN_EN, AR_WOW_BEACON_FAIL_EN);
64875c63 MSS	343	}
64875c63 MSS	344
64875c63	345	/*
bb631314	346	* Enable the magic packet registers.
64875c63	347	*/
bb631314 SM	348	magic_pattern = REG_READ(ah, AR_WOW_PATTERN);
	349	magic_pattern \|= AR_WOW_MAC_INTR_EN;
	350
64875c63	351	if (pattern_enable & AH_WOW_MAGIC_PATTERN_EN) {
bb631314	352	magic_pattern \|= AR_WOW_MAGIC_EN;
64875c63 MSS	353	wow_event_mask \|= AR_WOW_MAGIC_PAT_FOUND;
64875c63 MSS	354	} else {
bb631314	355	magic_pattern &= ~AR_WOW_MAGIC_EN;
64875c63	356	}
64875c63	357
bb631314 SM	358	REG_WRITE(ah, AR_WOW_PATTERN, magic_pattern);
	359
	360	/*
	361	* Enable pattern matching for packets which are less
	362	* than 256 bytes.
	363	*/
846e438f SM	364	REG_WRITE(ah, AR_WOW_PATTERN_MATCH_LT_256B,
846e438f SM	365	AR_WOW_PATTERN_SUPPORTED);
64875c63 MSS	366
64875c63 MSS	367	/*
bb631314	368	* Set the power states appropriately and enable PME.
64875c63	369	*/
bb631314 SM	370	host_pm_ctrl = REG_READ(ah, AR_PCIE_PM_CTRL);
	371	host_pm_ctrl \|= AR_PMCTRL_PWR_STATE_D1D3 \|
	372	AR_PMCTRL_HOST_PME_EN \|
	373	AR_PMCTRL_PWR_PM_CTRL_ENA;
	374	host_pm_ctrl &= ~AR_PCIE_PM_CTRL_ENA;
64875c63	375
bb631314 SM	376	if (AR_SREV_9462(ah)) {
	377	/*
	378	* This is needed to prevent the chip waking up
	379	* the host within 3-4 seconds with certain
	380	* platform/BIOS.
	381	*/
	382	host_pm_ctrl &= ~AR_PMCTRL_PWR_STATE_D1D3;
	383	host_pm_ctrl \|= AR_PMCTRL_PWR_STATE_D1D3_REAL;
	384	}
	385
	386	REG_WRITE(ah, AR_PCIE_PM_CTRL, host_pm_ctrl);
64875c63	387
846e438f	388	/*
bb631314	389	* Enable sequence number generation when asleep.
846e438f	390	*/
64875c63 MSS	391	REG_CLR_BIT(ah, AR_STA_ID1, AR_STA_ID1_PRESERVE_SEQNUM);
64875c63 MSS	392
bb631314 SM	393	/* To bring down WOW power low margin */
	394	REG_SET_BIT(ah, AR_PCIE_PHY_REG3, BIT(13));
	395
b6f68b1e SM	396	ath9k_hw_wow_set_arwr_reg(ah);
b6f68b1e SM	397
846e438f	398	/* HW WoW */
bb631314	399	REG_CLR_BIT(ah, AR_PCU_MISC_MODE3, BIT(5));
64875c63 MSS	400
64875c63 MSS	401	ath9k_hw_set_powermode_wow_sleep(ah);
41fe8837	402	ah->wow.wow_event_mask = wow_event_mask;
64875c63 MSS	403	}
64875c63 MSS	404	EXPORT_SYMBOL(ath9k_hw_wow_enable);