2 * Copyright (c) 2012 Qualcomm Atheros, Inc.
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.
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.
17 #include <linux/export.h>
23 static void ath9k_hw_set_powermode_wow_sleep(struct ath_hw *ah)
25 struct ath_common *common = ath9k_hw_common(ah);
27 REG_SET_BIT(ah, AR_STA_ID1, AR_STA_ID1_PWR_SAV);
29 /* set rx disable bit */
30 REG_WRITE(ah, AR_CR, AR_CR_RXD);
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));
38 if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) {
39 if (!REG_READ(ah, AR_MAC_PCU_GEN_TIMER_TSF_SEL))
40 REG_CLR_BIT(ah, AR_DIRECT_CONNECT, AR_DC_TSF2_ENABLE);
41 } else if (AR_SREV_9485(ah)){
42 if (!(REG_READ(ah, AR_NDP2_TIMER_MODE) &
43 AR_GEN_TIMERS2_MODE_ENABLE_MASK))
44 REG_CLR_BIT(ah, AR_DIRECT_CONNECT, AR_DC_TSF2_ENABLE);
47 REG_WRITE(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_ON_INT);
50 static void ath9k_wow_create_keep_alive_pattern(struct ath_hw *ah)
52 struct ath_common *common = ath9k_hw_common(ah);
53 u8 sta_mac_addr[ETH_ALEN], ap_mac_addr[ETH_ALEN];
55 u32 data_word[KAL_NUM_DATA_WORDS];
57 u32 wow_ka_data_word0;
59 memcpy(sta_mac_addr, common->macaddr, ETH_ALEN);
60 memcpy(ap_mac_addr, common->curbssid, ETH_ALEN);
62 /* set the transmit buffer */
63 ctl[0] = (KAL_FRAME_LEN | (MAX_RATE_POWER << 16));
65 ctl[3] = 0xb; /* OFDM_6M hardware value for this rate */
67 ctl[7] = (ah->txchainmask) << 2;
68 ctl[2] = 0xf << 16; /* tx_tries 0 */
70 for (i = 0; i < KAL_NUM_DESC_WORDS; i++)
71 REG_WRITE(ah, (AR_WOW_KA_DESC_WORD2 + i * 4), ctl[i]);
73 REG_WRITE(ah, (AR_WOW_KA_DESC_WORD2 + i * 4), ctl[i]);
75 data_word[0] = (KAL_FRAME_TYPE << 2) | (KAL_FRAME_SUB_TYPE << 4) |
76 (KAL_TO_DS << 8) | (KAL_DURATION_ID << 16);
77 data_word[1] = (ap_mac_addr[3] << 24) | (ap_mac_addr[2] << 16) |
78 (ap_mac_addr[1] << 8) | (ap_mac_addr[0]);
79 data_word[2] = (sta_mac_addr[1] << 24) | (sta_mac_addr[0] << 16) |
80 (ap_mac_addr[5] << 8) | (ap_mac_addr[4]);
81 data_word[3] = (sta_mac_addr[5] << 24) | (sta_mac_addr[4] << 16) |
82 (sta_mac_addr[3] << 8) | (sta_mac_addr[2]);
83 data_word[4] = (ap_mac_addr[3] << 24) | (ap_mac_addr[2] << 16) |
84 (ap_mac_addr[1] << 8) | (ap_mac_addr[0]);
85 data_word[5] = (ap_mac_addr[5] << 8) | (ap_mac_addr[4]);
87 if (AR_SREV_9462_20(ah)) {
88 /* AR9462 2.0 has an extra descriptor word (time based
89 * discard) compared to other chips */
90 REG_WRITE(ah, (AR_WOW_KA_DESC_WORD2 + (12 * 4)), 0);
91 wow_ka_data_word0 = AR_WOW_TXBUF(13);
93 wow_ka_data_word0 = AR_WOW_TXBUF(12);
96 for (i = 0; i < KAL_NUM_DATA_WORDS; i++)
97 REG_WRITE(ah, (wow_ka_data_word0 + i*4), data_word[i]);
101 int ath9k_hw_wow_apply_pattern(struct ath_hw *ah, u8 *user_pattern,
102 u8 *user_mask, int pattern_count,
106 u32 pattern_val, mask_val;
109 if (pattern_count >= ah->wow.max_patterns)
112 if (pattern_count < MAX_NUM_PATTERN_LEGACY)
113 REG_SET_BIT(ah, AR_WOW_PATTERN, BIT(pattern_count));
115 REG_SET_BIT(ah, AR_MAC_PCU_WOW4, BIT(pattern_count - 8));
117 for (i = 0; i < MAX_PATTERN_SIZE; i += 4) {
118 memcpy(&pattern_val, user_pattern, 4);
119 REG_WRITE(ah, (AR_WOW_TB_PATTERN(pattern_count) + i),
124 for (i = 0; i < MAX_PATTERN_MASK_SIZE; i += 4) {
125 memcpy(&mask_val, user_mask, 4);
126 REG_WRITE(ah, (AR_WOW_TB_MASK(pattern_count) + i), mask_val);
130 if (pattern_count < MAX_NUM_PATTERN_LEGACY)
131 ah->wow.wow_event_mask |=
132 BIT(pattern_count + AR_WOW_PAT_FOUND_SHIFT);
134 ah->wow.wow_event_mask2 |=
135 BIT((pattern_count - 8) + AR_WOW_PAT_FOUND_SHIFT);
137 if (pattern_count < 4) {
138 set = (pattern_len & AR_WOW_LENGTH_MAX) <<
139 AR_WOW_LEN1_SHIFT(pattern_count);
140 clr = AR_WOW_LENGTH1_MASK(pattern_count);
141 REG_RMW(ah, AR_WOW_LENGTH1, set, clr);
142 } else if (pattern_count < 8) {
143 set = (pattern_len & AR_WOW_LENGTH_MAX) <<
144 AR_WOW_LEN2_SHIFT(pattern_count);
145 clr = AR_WOW_LENGTH2_MASK(pattern_count);
146 REG_RMW(ah, AR_WOW_LENGTH2, set, clr);
147 } else if (pattern_count < 12) {
148 set = (pattern_len & AR_WOW_LENGTH_MAX) <<
149 AR_WOW_LEN3_SHIFT(pattern_count);
150 clr = AR_WOW_LENGTH3_MASK(pattern_count);
151 REG_RMW(ah, AR_WOW_LENGTH3, set, clr);
152 } else if (pattern_count < MAX_NUM_PATTERN) {
153 set = (pattern_len & AR_WOW_LENGTH_MAX) <<
154 AR_WOW_LEN4_SHIFT(pattern_count);
155 clr = AR_WOW_LENGTH4_MASK(pattern_count);
156 REG_RMW(ah, AR_WOW_LENGTH4, set, clr);
161 EXPORT_SYMBOL(ath9k_hw_wow_apply_pattern);
163 u32 ath9k_hw_wow_wakeup(struct ath_hw *ah)
169 * read the WoW status register to know
172 rval = REG_READ(ah, AR_WOW_PATTERN);
173 val = AR_WOW_STATUS(rval);
176 * mask only the WoW events that we have enabled. Sometimes
177 * we have spurious WoW events from the AR_WOW_PATTERN
178 * register. This mask will clean it up.
181 val &= ah->wow.wow_event_mask;
184 if (val & AR_WOW_MAGIC_PAT_FOUND)
185 wow_status |= AH_WOW_MAGIC_PATTERN_EN;
186 if (AR_WOW_PATTERN_FOUND(val))
187 wow_status |= AH_WOW_USER_PATTERN_EN;
188 if (val & AR_WOW_KEEP_ALIVE_FAIL)
189 wow_status |= AH_WOW_LINK_CHANGE;
190 if (val & AR_WOW_BEACON_FAIL)
191 wow_status |= AH_WOW_BEACON_MISS;
195 * set and clear WOW_PME_CLEAR registers for the chip to
196 * generate next wow signal.
197 * disable D3 before accessing other registers ?
200 /* do we need to check the bit value 0x01000000 (7-10) ?? */
201 REG_RMW(ah, AR_PCIE_PM_CTRL, AR_PMCTRL_WOW_PME_CLR,
202 AR_PMCTRL_PWR_STATE_D1D3);
207 REG_WRITE(ah, AR_WOW_PATTERN,
208 AR_WOW_CLEAR_EVENTS(REG_READ(ah, AR_WOW_PATTERN)));
211 * restore the beacon threshold to init value
213 REG_WRITE(ah, AR_RSSI_THR, INIT_RSSI_THR);
216 * Restore the way the PCI-E reset, Power-On-Reset, external
217 * PCIE_POR_SHORT pins are tied to its original value.
218 * Previously just before WoW sleep, we untie the PCI-E
219 * reset to our Chip's Power On Reset so that any PCI-E
220 * reset from the bus will not reset our chip
222 if (ah->is_pciexpress)
223 ath9k_hw_configpcipowersave(ah, false);
225 ah->wow.wow_event_mask = 0;
229 EXPORT_SYMBOL(ath9k_hw_wow_wakeup);
231 static void ath9k_hw_wow_set_arwr_reg(struct ath_hw *ah)
235 if (!ah->is_pciexpress)
239 * We need to untie the internal POR (power-on-reset)
240 * to the external PCI-E reset. We also need to tie
241 * the PCI-E Phy reset to the PCI-E reset.
243 wa_reg = REG_READ(ah, AR_WA);
244 wa_reg &= ~AR_WA_UNTIE_RESET_EN;
245 wa_reg |= AR_WA_RESET_EN;
246 wa_reg |= AR_WA_POR_SHORT;
248 REG_WRITE(ah, AR_WA, wa_reg);
251 void ath9k_hw_wow_enable(struct ath_hw *ah, u32 pattern_enable)
254 u32 keep_alive, magic_pattern, host_pm_ctrl;
256 wow_event_mask = ah->wow.wow_event_mask;
259 * AR_PMCTRL_HOST_PME_EN - Override PME enable in configuration
260 * space and allow MAC to generate WoW anyway.
262 * AR_PMCTRL_PWR_PM_CTRL_ENA - ???
264 * AR_PMCTRL_AUX_PWR_DET - PCI core SYS_AUX_PWR_DET signal,
265 * needs to be set for WoW in PCI mode.
267 * AR_PMCTRL_WOW_PME_CLR - WoW Clear Signal going to the MAC.
269 * Set the power states appropriately and enable PME.
271 * Set and clear WOW_PME_CLEAR for the chip
272 * to generate next wow signal.
274 REG_SET_BIT(ah, AR_PCIE_PM_CTRL, AR_PMCTRL_HOST_PME_EN |
275 AR_PMCTRL_PWR_PM_CTRL_ENA |
276 AR_PMCTRL_AUX_PWR_DET |
277 AR_PMCTRL_WOW_PME_CLR);
278 REG_CLR_BIT(ah, AR_PCIE_PM_CTRL, AR_PMCTRL_WOW_PME_CLR);
283 * 31:28 in AR_WOW_PATTERN : Indicates the number of bits used in the
284 * contention window. For value N,
285 * the random backoff will be selected between
288 REG_SET_BIT(ah, AR_WOW_PATTERN,
289 AR_WOW_BACK_OFF_SHIFT(AR_WOW_PAT_BACKOFF));
292 * AIFS time, Slot time, Keep Alive count.
294 REG_SET_BIT(ah, AR_WOW_COUNT, AR_WOW_AIFS_CNT(AR_WOW_CNT_AIFS_CNT) |
295 AR_WOW_SLOT_CNT(AR_WOW_CNT_SLOT_CNT) |
296 AR_WOW_KEEP_ALIVE_CNT(AR_WOW_CNT_KA_CNT));
300 if (pattern_enable & AH_WOW_BEACON_MISS)
301 REG_WRITE(ah, AR_WOW_BCN_TIMO, AR_WOW_BEACON_TIMO);
303 REG_WRITE(ah, AR_WOW_BCN_TIMO, AR_WOW_BEACON_TIMO_MAX);
306 * Keep alive timeout in ms.
309 REG_WRITE(ah, AR_WOW_KEEP_ALIVE_TIMO, AR_WOW_KEEP_ALIVE_NEVER);
311 REG_WRITE(ah, AR_WOW_KEEP_ALIVE_TIMO, KAL_TIMEOUT * 32);
314 * Keep alive delay in us.
316 REG_WRITE(ah, AR_WOW_KEEP_ALIVE_DELAY, KAL_DELAY * 1000);
319 * Create keep alive pattern to respond to beacons.
321 ath9k_wow_create_keep_alive_pattern(ah);
324 * Configure keep alive register.
326 keep_alive = REG_READ(ah, AR_WOW_KEEP_ALIVE);
328 /* Send keep alive timeouts anyway */
329 keep_alive &= ~AR_WOW_KEEP_ALIVE_AUTO_DIS;
331 if (pattern_enable & AH_WOW_LINK_CHANGE) {
332 keep_alive &= ~AR_WOW_KEEP_ALIVE_FAIL_DIS;
333 wow_event_mask |= AR_WOW_KEEP_ALIVE_FAIL;
335 keep_alive |= AR_WOW_KEEP_ALIVE_FAIL_DIS;
338 REG_WRITE(ah, AR_WOW_KEEP_ALIVE, keep_alive);
341 * We are relying on a bmiss failure, ensure we have
342 * enough threshold to prevent false positives.
344 REG_RMW_FIELD(ah, AR_RSSI_THR, AR_RSSI_THR_BM_THR,
345 AR_WOW_BMISSTHRESHOLD);
347 if (pattern_enable & AH_WOW_BEACON_MISS) {
348 wow_event_mask |= AR_WOW_BEACON_FAIL;
349 REG_SET_BIT(ah, AR_WOW_BCN_EN, AR_WOW_BEACON_FAIL_EN);
351 REG_CLR_BIT(ah, AR_WOW_BCN_EN, AR_WOW_BEACON_FAIL_EN);
355 * Enable the magic packet registers.
357 magic_pattern = REG_READ(ah, AR_WOW_PATTERN);
358 magic_pattern |= AR_WOW_MAC_INTR_EN;
360 if (pattern_enable & AH_WOW_MAGIC_PATTERN_EN) {
361 magic_pattern |= AR_WOW_MAGIC_EN;
362 wow_event_mask |= AR_WOW_MAGIC_PAT_FOUND;
364 magic_pattern &= ~AR_WOW_MAGIC_EN;
367 REG_WRITE(ah, AR_WOW_PATTERN, magic_pattern);
370 * Enable pattern matching for packets which are less
373 REG_WRITE(ah, AR_WOW_PATTERN_MATCH_LT_256B,
374 AR_WOW_PATTERN_SUPPORTED);
377 * Set the power states appropriately and enable PME.
379 host_pm_ctrl = REG_READ(ah, AR_PCIE_PM_CTRL);
380 host_pm_ctrl |= AR_PMCTRL_PWR_STATE_D1D3 |
381 AR_PMCTRL_HOST_PME_EN |
382 AR_PMCTRL_PWR_PM_CTRL_ENA;
383 host_pm_ctrl &= ~AR_PCIE_PM_CTRL_ENA;
385 if (AR_SREV_9462(ah)) {
387 * This is needed to prevent the chip waking up
388 * the host within 3-4 seconds with certain
391 host_pm_ctrl &= ~AR_PMCTRL_PWR_STATE_D1D3;
392 host_pm_ctrl |= AR_PMCTRL_PWR_STATE_D1D3_REAL;
395 REG_WRITE(ah, AR_PCIE_PM_CTRL, host_pm_ctrl);
398 * Enable sequence number generation when asleep.
400 REG_CLR_BIT(ah, AR_STA_ID1, AR_STA_ID1_PRESERVE_SEQNUM);
402 /* To bring down WOW power low margin */
403 REG_SET_BIT(ah, AR_PCIE_PHY_REG3, BIT(13));
405 ath9k_hw_wow_set_arwr_reg(ah);
408 REG_CLR_BIT(ah, AR_PCU_MISC_MODE3, BIT(5));
410 ath9k_hw_set_powermode_wow_sleep(ah);
411 ah->wow.wow_event_mask = wow_event_mask;
413 EXPORT_SYMBOL(ath9k_hw_wow_enable);