| /* |
| * 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_config_serdes_wow_sleep(struct ath_hw *ah) |
| { |
| int i; |
| |
| for (i = 0; i < ah->iniPcieSerdesWow.ia_rows; i++) |
| REG_WRITE(ah, INI_RA(&ah->iniPcieSerdesWow, i, 0), |
| INI_RA(&ah->iniPcieSerdesWow, i, 1)); |
| |
| usleep_range(1000, 1500); |
| } |
| |
| 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; |
| } else { |
| if (!AR_SREV_9300_20_OR_LATER(ah)) |
| REG_WRITE(ah, AR_RXDP, 0x0); |
| } |
| |
| /* AR9280 WoW has sleep issue, do not set it to sleep */ |
| if (AR_SREV_9280_20(ah)) |
| 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)); |
| |
| if (!(AR_SREV_9300_20_OR_LATER(ah))) |
| ctl[0] += (KAL_ANTENNA_MODE << 25); |
| |
| ctl[1] = 0; |
| ctl[3] = 0xb; /* OFDM_6M hardware value for this rate */ |
| ctl[4] = 0; |
| ctl[7] = (ah->txchainmask) << 2; |
| |
| if (AR_SREV_9300_20_OR_LATER(ah)) |
| ctl[2] = 0xf << 16; /* tx_tries 0 */ |
| else |
| ctl[2] = 0x7 << 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]); |
| |
| /* for AR9300 family 13 descriptor words */ |
| if (AR_SREV_9300_20_OR_LATER(ah)) |
| 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_OR_LATER(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 (!AR_SREV_9285_12_OR_LATER(ah)) |
| return; |
| |
| 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))); |
| |
| /* |
| * tie reset register for AR9002 family of chipsets |
| * NB: not tieing it back might have some repurcussions. |
| */ |
| |
| if (!AR_SREV_9300_20_OR_LATER(ah)) { |
| REG_SET_BIT(ah, AR_WA, AR_WA_UNTIE_RESET_EN | |
| AR_WA_POR_SHORT | AR_WA_RESET_EN); |
| } |
| |
| |
| /* |
| * 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 (AR_SREV_9280_20_OR_LATER(ah) && 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. |
| */ |
| |
| if (AR_SREV_9300_20_OR_LATER(ah)) { |
| 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); |
| } else { |
| if (AR_SREV_9285(ah) || AR_SREV_9287(ah)) |
| set = AR9285_WA_DEFAULT; |
| else |
| set = AR9280_WA_DEFAULT; |
| |
| /* |
| * In AR9280 and AR9285, bit 14 in WA register |
| * (disable L1) should only be set when device |
| * enters D3 state and be cleared when device |
| * comes back to D0 |
| */ |
| |
| if (ah->config.pcie_waen & AR_WA_D3_L1_DISABLE) |
| set |= AR_WA_D3_L1_DISABLE; |
| |
| clr = AR_WA_UNTIE_RESET_EN; |
| set |= AR_WA_RESET_EN | AR_WA_POR_SHORT; |
| REG_RMW(ah, AR_WA, set, clr); |
| |
| /* |
| * for WoW sleep, we reprogram the SerDes so that the |
| * PLL and CLK REQ are both enabled. This uses more |
| * power but otherwise WoW sleep is unstable and the |
| * chip may disappear. |
| */ |
| |
| if (AR_SREV_9285_12_OR_LATER(ah)) |
| ath9k_hw_config_serdes_wow_sleep(ah); |
| |
| } |
| } |
| |
| /* |
| * 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 || AR_SREV_9280(ah)) |
| 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; |
| |
| /* |
| * FIXME: For now disable keep alive frame |
| * failure. This seems to sometimes trigger |
| * unnecessary wake up with AR9485 chipsets. |
| */ |
| 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); |
| |
| /* |
| * For AR9285 and later version of chipsets |
| * enable WoW pattern match for packets less |
| * than 256 bytes for all patterns |
| */ |
| if (AR_SREV_9285_12_OR_LATER(ah)) |
| 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; |
| /* |
| * This is needed for AR9300 chipsets to wake-up |
| * the host. |
| */ |
| if (AR_SREV_9300_20_OR_LATER(ah)) |
| clr = AR_PCIE_PM_CTRL_ENA; |
| |
| REG_RMW(ah, AR_PCIE_PM_CTRL, set, clr); |
| |
| if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) { |
| /* |
| * 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); |
| |
| if (AR_SREV_9300_20_OR_LATER(ah)) { |
| /* 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); |