diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/wow.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/wow.c | 422 |
1 files changed, 0 insertions, 422 deletions
diff --git a/drivers/net/wireless/ath/ath9k/wow.c b/drivers/net/wireless/ath/ath9k/wow.c deleted file mode 100644 index 81c88dd606dc..000000000000 --- a/drivers/net/wireless/ath/ath9k/wow.c +++ /dev/null @@ -1,422 +0,0 @@ -/* - * 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 "hw-ops.h" - -const char *ath9k_hw_wow_event_to_string(u32 wow_event) -{ - if (wow_event & AH_WOW_MAGIC_PATTERN_EN) - return "Magic pattern"; - if (wow_event & AH_WOW_USER_PATTERN_EN) - return "User pattern"; - if (wow_event & AH_WOW_LINK_CHANGE) - return "Link change"; - if (wow_event & AH_WOW_BEACON_MISS) - return "Beacon miss"; - - return "unknown reason"; -} -EXPORT_SYMBOL(ath9k_hw_wow_event_to_string); - -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]); - -} - -void 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; - - /* FIXME: should check count by querying the hardware capability */ - if (pattern_count >= MAX_NUM_PATTERN) - return; - - REG_SET_BIT(ah, AR_WOW_PATTERN, BIT(pattern_count)); - - /* set the registers for pattern */ - 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; - } - - /* set the registers for mask */ - 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; - } - - /* set the pattern length to be matched - * - * AR_WOW_LENGTH1_REG1 - * bit 31:24 pattern 0 length - * bit 23:16 pattern 1 length - * bit 15:8 pattern 2 length - * bit 7:0 pattern 3 length - * - * AR_WOW_LENGTH1_REG2 - * bit 31:24 pattern 4 length - * bit 23:16 pattern 5 length - * bit 15:8 pattern 6 length - * bit 7:0 pattern 7 length - * - * the below logic writes out the new - * pattern length for the corresponding - * pattern_count, while masking out the - * other fields - */ - - ah->wow_event_mask |= BIT(pattern_count + AR_WOW_PAT_FOUND_SHIFT); - - if (pattern_count < 4) { - /* Pattern 0-3 uses AR_WOW_LENGTH1 register */ - 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 { - /* Pattern 4-7 uses AR_WOW_LENGTH2 register */ - 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); - } - -} -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_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_event_mask = 0; - - return wow_status; -} -EXPORT_SYMBOL(ath9k_hw_wow_wakeup); - -void ath9k_hw_wow_enable(struct ath_hw *ah, u32 pattern_enable) -{ - u32 wow_event_mask; - u32 set, clr; - - /* - * wow_event_mask is a mask to the AR_WOW_PATTERN register to - * indicate which WoW events we have enabled. The WoW events - * are from the 'pattern_enable' in this function and - * 'pattern_count' of ath9k_hw_wow_apply_pattern() - */ - wow_event_mask = ah->wow_event_mask; - - /* - * Untie Power-on-Reset from the PCI-E-Reset. When we are in - * WOW sleep, we do want the Reset from the PCI-E to disturb - * our hw state - */ - if (ah->is_pciexpress) { - /* - * 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. - */ - set = AR_WA_RESET_EN | AR_WA_POR_SHORT; - clr = AR_WA_UNTIE_RESET_EN | AR_WA_D3_L1_DISABLE; - REG_RMW(ah, AR_WA, set, clr); - } - - /* - * set the power states appropriately and enable PME - */ - set = AR_PMCTRL_HOST_PME_EN | AR_PMCTRL_PWR_PM_CTRL_ENA | - AR_PMCTRL_AUX_PWR_DET | AR_PMCTRL_WOW_PME_CLR; - - /* - * set and clear WOW_PME_CLEAR registers for the chip - * to generate next wow signal. - */ - REG_SET_BIT(ah, AR_PCIE_PM_CTRL, set); - clr = AR_PMCTRL_WOW_PME_CLR; - REG_CLR_BIT(ah, AR_PCIE_PM_CTRL, clr); - - /* - * Setup for: - * - beacon misses - * - magic pattern - * - keep alive timeout - * - pattern matching - */ - - /* - * Program default values for pattern backoff, aifs/slot/KAL count, - * beacon miss timeout, KAL timeout, etc. - */ - set = AR_WOW_BACK_OFF_SHIFT(AR_WOW_PAT_BACKOFF); - REG_SET_BIT(ah, AR_WOW_PATTERN, set); - - set = 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); - REG_SET_BIT(ah, AR_WOW_COUNT, set); - - if (pattern_enable & AH_WOW_BEACON_MISS) - set = AR_WOW_BEACON_TIMO; - /* We are not using beacon miss, program a large value */ - else - set = AR_WOW_BEACON_TIMO_MAX; - - REG_WRITE(ah, AR_WOW_BCN_TIMO, set); - - /* - * Keep alive timo in ms except AR9280 - */ - if (!pattern_enable) - set = AR_WOW_KEEP_ALIVE_NEVER; - else - set = KAL_TIMEOUT * 32; - - REG_WRITE(ah, AR_WOW_KEEP_ALIVE_TIMO, set); - - /* - * Keep alive delay in us. based on 'power on clock', - * therefore in usec - */ - set = KAL_DELAY * 1000; - REG_WRITE(ah, AR_WOW_KEEP_ALIVE_DELAY, set); - - /* - * Create keep alive pattern to respond to beacons - */ - ath9k_wow_create_keep_alive_pattern(ah); - - /* - * Configure MAC WoW Registers - */ - set = 0; - /* Send keep alive timeouts anyway */ - clr = AR_WOW_KEEP_ALIVE_AUTO_DIS; - - if (pattern_enable & AH_WOW_LINK_CHANGE) - wow_event_mask |= AR_WOW_KEEP_ALIVE_FAIL; - else - set = AR_WOW_KEEP_ALIVE_FAIL_DIS; - - set = AR_WOW_KEEP_ALIVE_FAIL_DIS; - REG_RMW(ah, AR_WOW_KEEP_ALIVE, set, clr); - - /* - * 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); - - set = 0; - clr = 0; - - if (pattern_enable & AH_WOW_BEACON_MISS) { - set = AR_WOW_BEACON_FAIL_EN; - wow_event_mask |= AR_WOW_BEACON_FAIL; - } else { - clr = AR_WOW_BEACON_FAIL_EN; - } - - REG_RMW(ah, AR_WOW_BCN_EN, set, clr); - - set = 0; - clr = 0; - /* - * Enable the magic packet registers - */ - if (pattern_enable & AH_WOW_MAGIC_PATTERN_EN) { - set = AR_WOW_MAGIC_EN; - wow_event_mask |= AR_WOW_MAGIC_PAT_FOUND; - } else { - clr = AR_WOW_MAGIC_EN; - } - set |= AR_WOW_MAC_INTR_EN; - REG_RMW(ah, AR_WOW_PATTERN, set, clr); - - REG_WRITE(ah, AR_WOW_PATTERN_MATCH_LT_256B, - AR_WOW_PATTERN_SUPPORTED); - - /* - * Set the power states appropriately and enable PME - */ - clr = 0; - set = AR_PMCTRL_PWR_STATE_D1D3 | AR_PMCTRL_HOST_PME_EN | - AR_PMCTRL_PWR_PM_CTRL_ENA; - - clr = AR_PCIE_PM_CTRL_ENA; - REG_RMW(ah, AR_PCIE_PM_CTRL, set, clr); - - /* - * this is needed to prevent the chip waking up - * the host within 3-4 seconds with certain - * platform/BIOS. The fix is to enable - * D1 & D3 to match original definition and - * also match the OTP value. Anyway this - * is more related to SW WOW. - */ - clr = AR_PMCTRL_PWR_STATE_D1D3; - REG_CLR_BIT(ah, AR_PCIE_PM_CTRL, clr); - - set = AR_PMCTRL_PWR_STATE_D1D3_REAL; - REG_SET_BIT(ah, AR_PCIE_PM_CTRL, set); - - REG_CLR_BIT(ah, AR_STA_ID1, AR_STA_ID1_PRESERVE_SEQNUM); - - /* to bring down WOW power low margin */ - set = BIT(13); - REG_SET_BIT(ah, AR_PCIE_PHY_REG3, set); - /* HW WoW */ - clr = BIT(5); - REG_CLR_BIT(ah, AR_PCU_MISC_MODE3, clr); - - ath9k_hw_set_powermode_wow_sleep(ah); - ah->wow_event_mask = wow_event_mask; -} -EXPORT_SYMBOL(ath9k_hw_wow_enable); |