cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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htc_drv_gpio.c (9467B)


      1/*
      2 * Copyright (c) 2010-2011 Atheros Communications 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 "htc.h"
     18
     19/******************/
     20/*     BTCOEX     */
     21/******************/
     22
     23#define ATH_HTC_BTCOEX_PRODUCT_ID "wb193"
     24
     25#ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
     26
     27/*
     28 * Detects if there is any priority bt traffic
     29 */
     30static void ath_detect_bt_priority(struct ath9k_htc_priv *priv)
     31{
     32	struct ath_btcoex *btcoex = &priv->btcoex;
     33	struct ath_hw *ah = priv->ah;
     34
     35	if (ath9k_hw_gpio_get(ah, ah->btcoex_hw.btpriority_gpio))
     36		btcoex->bt_priority_cnt++;
     37
     38	if (time_after(jiffies, btcoex->bt_priority_time +
     39			msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) {
     40		clear_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);
     41		clear_bit(OP_BT_SCAN, &priv->op_flags);
     42		/* Detect if colocated bt started scanning */
     43		if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) {
     44			ath_dbg(ath9k_hw_common(ah), BTCOEX,
     45				"BT scan detected\n");
     46			set_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);
     47			set_bit(OP_BT_SCAN, &priv->op_flags);
     48		} else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
     49			ath_dbg(ath9k_hw_common(ah), BTCOEX,
     50				"BT priority traffic detected\n");
     51			set_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);
     52		}
     53
     54		btcoex->bt_priority_cnt = 0;
     55		btcoex->bt_priority_time = jiffies;
     56	}
     57}
     58
     59/*
     60 * This is the master bt coex work which runs for every
     61 * 45ms, bt traffic will be given priority during 55% of this
     62 * period while wlan gets remaining 45%
     63 */
     64static void ath_btcoex_period_work(struct work_struct *work)
     65{
     66	struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv,
     67						   coex_period_work.work);
     68	struct ath_btcoex *btcoex = &priv->btcoex;
     69	struct ath_common *common = ath9k_hw_common(priv->ah);
     70	u32 timer_period;
     71	int ret;
     72
     73	ath_detect_bt_priority(priv);
     74
     75	ret = ath9k_htc_update_cap_target(priv,
     76			  test_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags));
     77	if (ret) {
     78		ath_err(common, "Unable to set BTCOEX parameters\n");
     79		return;
     80	}
     81
     82	ath9k_hw_btcoex_bt_stomp(priv->ah, test_bit(OP_BT_SCAN, &priv->op_flags) ?
     83				 ATH_BTCOEX_STOMP_ALL : btcoex->bt_stomp_type);
     84
     85	ath9k_hw_btcoex_enable(priv->ah);
     86	timer_period = test_bit(OP_BT_SCAN, &priv->op_flags) ?
     87		btcoex->btscan_no_stomp : btcoex->btcoex_no_stomp;
     88	ieee80211_queue_delayed_work(priv->hw, &priv->duty_cycle_work,
     89				     msecs_to_jiffies(timer_period));
     90	ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work,
     91				     msecs_to_jiffies(btcoex->btcoex_period));
     92}
     93
     94/*
     95 * Work to time slice between wlan and bt traffic and
     96 * configure weight registers
     97 */
     98static void ath_btcoex_duty_cycle_work(struct work_struct *work)
     99{
    100	struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv,
    101						   duty_cycle_work.work);
    102	struct ath_hw *ah = priv->ah;
    103	struct ath_btcoex *btcoex = &priv->btcoex;
    104	struct ath_common *common = ath9k_hw_common(ah);
    105
    106	ath_dbg(common, BTCOEX, "time slice work for bt and wlan\n");
    107
    108	if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW ||
    109	    test_bit(OP_BT_SCAN, &priv->op_flags))
    110		ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE);
    111	else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL)
    112		ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_LOW);
    113
    114	ath9k_hw_btcoex_enable(priv->ah);
    115}
    116
    117static void ath_htc_init_btcoex_work(struct ath9k_htc_priv *priv)
    118{
    119	struct ath_btcoex *btcoex = &priv->btcoex;
    120
    121	btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD;
    122	btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) *
    123		btcoex->btcoex_period / 100;
    124	btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) *
    125				   btcoex->btcoex_period / 100;
    126	INIT_DELAYED_WORK(&priv->coex_period_work, ath_btcoex_period_work);
    127	INIT_DELAYED_WORK(&priv->duty_cycle_work, ath_btcoex_duty_cycle_work);
    128}
    129
    130/*
    131 * (Re)start btcoex work
    132 */
    133
    134static void ath_htc_resume_btcoex_work(struct ath9k_htc_priv *priv)
    135{
    136	struct ath_btcoex *btcoex = &priv->btcoex;
    137	struct ath_hw *ah = priv->ah;
    138
    139	ath_dbg(ath9k_hw_common(ah), BTCOEX, "Starting btcoex work\n");
    140
    141	btcoex->bt_priority_cnt = 0;
    142	btcoex->bt_priority_time = jiffies;
    143	clear_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);
    144	clear_bit(OP_BT_SCAN, &priv->op_flags);
    145	ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work, 0);
    146}
    147
    148
    149/*
    150 * Cancel btcoex and bt duty cycle work.
    151 */
    152static void ath_htc_cancel_btcoex_work(struct ath9k_htc_priv *priv)
    153{
    154	cancel_delayed_work_sync(&priv->coex_period_work);
    155	cancel_delayed_work_sync(&priv->duty_cycle_work);
    156}
    157
    158void ath9k_htc_start_btcoex(struct ath9k_htc_priv *priv)
    159{
    160	struct ath_hw *ah = priv->ah;
    161
    162	if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE) {
    163		ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
    164					   AR_STOMP_LOW_WLAN_WGHT, 0);
    165		ath9k_hw_btcoex_enable(ah);
    166		ath_htc_resume_btcoex_work(priv);
    167	}
    168}
    169
    170void ath9k_htc_stop_btcoex(struct ath9k_htc_priv *priv)
    171{
    172	struct ath_hw *ah = priv->ah;
    173
    174	if (ah->btcoex_hw.enabled &&
    175	    ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) {
    176		if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
    177			ath_htc_cancel_btcoex_work(priv);
    178		ath9k_hw_btcoex_disable(ah);
    179	}
    180}
    181
    182void ath9k_htc_init_btcoex(struct ath9k_htc_priv *priv, char *product)
    183{
    184	struct ath_hw *ah = priv->ah;
    185	struct ath_common *common = ath9k_hw_common(ah);
    186	int qnum;
    187
    188	/*
    189	 * Check if BTCOEX is globally disabled.
    190	 */
    191	if (!common->btcoex_enabled) {
    192		ah->btcoex_hw.scheme = ATH_BTCOEX_CFG_NONE;
    193		return;
    194	}
    195
    196	if (product && strncmp(product, ATH_HTC_BTCOEX_PRODUCT_ID, 5) == 0) {
    197		ah->btcoex_hw.scheme = ATH_BTCOEX_CFG_3WIRE;
    198	}
    199
    200	switch (ath9k_hw_get_btcoex_scheme(priv->ah)) {
    201	case ATH_BTCOEX_CFG_NONE:
    202		break;
    203	case ATH_BTCOEX_CFG_3WIRE:
    204		priv->ah->btcoex_hw.btactive_gpio = 7;
    205		priv->ah->btcoex_hw.btpriority_gpio = 6;
    206		priv->ah->btcoex_hw.wlanactive_gpio = 8;
    207		priv->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
    208		ath9k_hw_btcoex_init_3wire(priv->ah);
    209		ath_htc_init_btcoex_work(priv);
    210		qnum = priv->hwq_map[IEEE80211_AC_BE];
    211		ath9k_hw_init_btcoex_hw(priv->ah, qnum);
    212		break;
    213	default:
    214		WARN_ON(1);
    215		break;
    216	}
    217}
    218
    219#endif /* CONFIG_ATH9K_BTCOEX_SUPPORT */
    220
    221/*******/
    222/* LED */
    223/*******/
    224
    225#ifdef CONFIG_MAC80211_LEDS
    226void ath9k_led_work(struct work_struct *work)
    227{
    228	struct ath9k_htc_priv *priv = container_of(work,
    229						   struct ath9k_htc_priv,
    230						   led_work);
    231
    232	ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin,
    233			  (priv->brightness == LED_OFF));
    234}
    235
    236static void ath9k_led_brightness(struct led_classdev *led_cdev,
    237				 enum led_brightness brightness)
    238{
    239	struct ath9k_htc_priv *priv = container_of(led_cdev,
    240						   struct ath9k_htc_priv,
    241						   led_cdev);
    242
    243	/* Not locked, but it's just a tiny green light..*/
    244	priv->brightness = brightness;
    245	ieee80211_queue_work(priv->hw, &priv->led_work);
    246}
    247
    248void ath9k_deinit_leds(struct ath9k_htc_priv *priv)
    249{
    250	if (!priv->led_registered)
    251		return;
    252
    253	ath9k_led_brightness(&priv->led_cdev, LED_OFF);
    254	led_classdev_unregister(&priv->led_cdev);
    255	cancel_work_sync(&priv->led_work);
    256
    257	ath9k_hw_gpio_free(priv->ah, priv->ah->led_pin);
    258}
    259
    260
    261void ath9k_configure_leds(struct ath9k_htc_priv *priv)
    262{
    263	/* Configure gpio 1 for output */
    264	ath9k_hw_gpio_request_out(priv->ah, priv->ah->led_pin,
    265				  "ath9k-led",
    266				  AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
    267	/* LED off, active low */
    268	ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 1);
    269}
    270
    271void ath9k_init_leds(struct ath9k_htc_priv *priv)
    272{
    273	int ret;
    274
    275	if (AR_SREV_9287(priv->ah))
    276		priv->ah->led_pin = ATH_LED_PIN_9287;
    277	else if (AR_SREV_9271(priv->ah))
    278		priv->ah->led_pin = ATH_LED_PIN_9271;
    279	else if (AR_DEVID_7010(priv->ah))
    280		priv->ah->led_pin = ATH_LED_PIN_7010;
    281	else
    282		priv->ah->led_pin = ATH_LED_PIN_DEF;
    283
    284	if (!ath9k_htc_led_blink)
    285		priv->led_cdev.default_trigger =
    286			ieee80211_get_radio_led_name(priv->hw);
    287
    288	ath9k_configure_leds(priv);
    289
    290	snprintf(priv->led_name, sizeof(priv->led_name),
    291		"ath9k_htc-%s", wiphy_name(priv->hw->wiphy));
    292	priv->led_cdev.name = priv->led_name;
    293	priv->led_cdev.brightness_set = ath9k_led_brightness;
    294
    295	ret = led_classdev_register(wiphy_dev(priv->hw->wiphy), &priv->led_cdev);
    296	if (ret < 0)
    297		return;
    298
    299	INIT_WORK(&priv->led_work, ath9k_led_work);
    300	priv->led_registered = true;
    301
    302	return;
    303}
    304#endif
    305
    306/*******************/
    307/*	Rfkill	   */
    308/*******************/
    309
    310static bool ath_is_rfkill_set(struct ath9k_htc_priv *priv)
    311{
    312	bool is_blocked;
    313
    314	ath9k_htc_ps_wakeup(priv);
    315	is_blocked = ath9k_hw_gpio_get(priv->ah, priv->ah->rfkill_gpio) ==
    316						 priv->ah->rfkill_polarity;
    317	ath9k_htc_ps_restore(priv);
    318
    319	return is_blocked;
    320}
    321
    322void ath9k_htc_rfkill_poll_state(struct ieee80211_hw *hw)
    323{
    324	struct ath9k_htc_priv *priv = hw->priv;
    325	bool blocked = !!ath_is_rfkill_set(priv);
    326
    327	wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
    328}
    329
    330void ath9k_start_rfkill_poll(struct ath9k_htc_priv *priv)
    331{
    332	if (priv->ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
    333		wiphy_rfkill_start_polling(priv->hw->wiphy);
    334}