diff options
| -rw-r--r-- | package/kernel/mac80211/patches/550-ath9k_entropy_from_adc.patch | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/550-ath9k_entropy_from_adc.patch b/package/kernel/mac80211/patches/550-ath9k_entropy_from_adc.patch new file mode 100644 index 0000000000..d6333459b0 --- /dev/null +++ b/package/kernel/mac80211/patches/550-ath9k_entropy_from_adc.patch @@ -0,0 +1,200 @@ +--- a/drivers/net/wireless/ath/ath9k/hw.h ++++ b/drivers/net/wireless/ath/ath9k/hw.h +@@ -676,6 +676,7 @@ struct ath_spec_scan { + * @config_pci_powersave: + * @calibrate: periodic calibration for NF, ANI, IQ, ADC gain, ADC-DC + * ++ * @get_adc_entropy: get entropy from the raw ADC I/Q output + * @spectral_scan_config: set parameters for spectral scan and enable/disable it + * @spectral_scan_trigger: trigger a spectral scan run + * @spectral_scan_wait: wait for a spectral scan run to finish +@@ -698,6 +699,7 @@ struct ath_hw_ops { + struct ath_hw_antcomb_conf *antconf); + void (*antdiv_comb_conf_set)(struct ath_hw *ah, + struct ath_hw_antcomb_conf *antconf); ++ void (*get_adc_entropy)(struct ath_hw *ah, u8 *buf, size_t len); + void (*spectral_scan_config)(struct ath_hw *ah, + struct ath_spec_scan *param); + void (*spectral_scan_trigger)(struct ath_hw *ah); +--- a/drivers/net/wireless/ath/ath9k/ar9003_phy.c ++++ b/drivers/net/wireless/ath/ath9k/ar9003_phy.c +@@ -1609,6 +1609,26 @@ static void ar9003_hw_spectral_scan_wait + } + } + ++static void ar9003_hw_get_adc_entropy(struct ath_hw *ah, u8 *buf, size_t len) ++{ ++ int i, j; ++ ++ REG_RMW_FIELD(ah, AR_PHY_TEST, AR_PHY_TEST_BBB_OBS_SEL, 1); ++ REG_CLR_BIT(ah, AR_PHY_TEST, AR_PHY_TEST_RX_OBS_SEL_BIT5); ++ REG_RMW_FIELD(ah, AR_PHY_TEST_CTL_STATUS, AR_PHY_TEST_CTL_RX_OBS_SEL, 0); ++ ++ memset(buf, 0, len); ++ for (i = 0; i < len; i++) { ++ for (j = 0; j < 4; j++) { ++ u32 regval = REG_READ(ah, AR_PHY_TST_ADC); ++ ++ buf[i] <<= 2; ++ buf[i] |= (regval & 1) | ((regval & BIT(10)) >> 9); ++ udelay(1); ++ } ++ } ++} ++ + void ar9003_hw_attach_phy_ops(struct ath_hw *ah) + { + struct ath_hw_private_ops *priv_ops = ath9k_hw_private_ops(ah); +@@ -1639,6 +1659,7 @@ void ar9003_hw_attach_phy_ops(struct ath + priv_ops->set_radar_params = ar9003_hw_set_radar_params; + priv_ops->fast_chan_change = ar9003_hw_fast_chan_change; + ++ ops->get_adc_entropy = ar9003_hw_get_adc_entropy; + ops->antdiv_comb_conf_get = ar9003_hw_antdiv_comb_conf_get; + ops->antdiv_comb_conf_set = ar9003_hw_antdiv_comb_conf_set; + ops->spectral_scan_config = ar9003_hw_spectral_scan_config; +--- a/drivers/net/wireless/ath/ath9k/init.c ++++ b/drivers/net/wireless/ath/ath9k/init.c +@@ -794,7 +794,8 @@ static void ath9k_init_txpower_limits(st + if (ah->caps.hw_caps & ATH9K_HW_CAP_5GHZ) + ath9k_init_band_txpower(sc, IEEE80211_BAND_5GHZ); + +- ah->curchan = curchan; ++ if (curchan) ++ ah->curchan = curchan; + } + + void ath9k_reload_chainmask_settings(struct ath_softc *sc) +@@ -940,6 +941,18 @@ void ath9k_set_hw_capab(struct ath_softc + SET_IEEE80211_PERM_ADDR(hw, common->macaddr); + } + ++static void ath_get_initial_entropy(struct ath_softc *sc) ++{ ++ struct ath_hw *ah = sc->sc_ah; ++ char buf[256]; ++ ++ /* reuse last channel initialized by the tx power test */ ++ ath9k_hw_reset(ah, ah->curchan, NULL, false); ++ ++ ath9k_hw_get_adc_entropy(ah, buf, sizeof(buf)); ++ add_device_randomness(buf, sizeof(buf)); ++} ++ + int ath9k_init_device(u16 devid, struct ath_softc *sc, + const struct ath_bus_ops *bus_ops) + { +@@ -985,6 +998,8 @@ int ath9k_init_device(u16 devid, struct + ARRAY_SIZE(ath9k_tpt_blink)); + #endif + ++ ath_get_initial_entropy(sc); ++ + /* Register with mac80211 */ + error = ieee80211_register_hw(hw); + if (error) +--- a/drivers/net/wireless/ath/ath9k/hw-ops.h ++++ b/drivers/net/wireless/ath/ath9k/hw-ops.h +@@ -78,6 +78,12 @@ static inline void ath9k_hw_antdiv_comb_ + ath9k_hw_ops(ah)->antdiv_comb_conf_set(ah, antconf); + } + ++static inline void ath9k_hw_get_adc_entropy(struct ath_hw *ah, ++ u8 *buf, size_t len) ++{ ++ ath9k_hw_ops(ah)->get_adc_entropy(ah, buf, len); ++} ++ + #ifdef CPTCFG_ATH9K_BTCOEX_SUPPORT + + static inline void ath9k_hw_set_bt_ant_diversity(struct ath_hw *ah, bool enable) +--- a/drivers/net/wireless/ath/ath9k/link.c ++++ b/drivers/net/wireless/ath/ath9k/link.c +@@ -342,6 +342,11 @@ void ath_ani_calibrate(unsigned long dat + unsigned int timestamp = jiffies_to_msecs(jiffies); + u32 cal_interval, short_cal_interval, long_cal_interval; + unsigned long flags; ++ char buf[256]; ++ ++ /* gather entropy */ ++ ath9k_hw_get_adc_entropy(ah, buf, sizeof(buf)); ++ add_device_randomness(buf, sizeof(buf)); + + if (ah->caldata && ah->caldata->nfcal_interference) + long_cal_interval = ATH_LONG_CALINTERVAL_INT; +--- a/drivers/net/wireless/ath/ath9k/ar5008_phy.c ++++ b/drivers/net/wireless/ath/ath9k/ar5008_phy.c +@@ -1299,9 +1299,30 @@ static void ar5008_hw_set_radar_conf(str + conf->radar_inband = 8; + } + ++static void ar5008_hw_get_adc_entropy(struct ath_hw *ah, u8 *buf, size_t len) ++{ ++ int i, j; ++ ++ REG_RMW_FIELD(ah, AR_PHY_TEST, AR_PHY_TEST_BBB_OBS_SEL, 1); ++ REG_CLR_BIT(ah, AR_PHY_TEST, AR_PHY_TEST_RX_OBS_SEL_BIT5); ++ REG_RMW_FIELD(ah, AR_PHY_TEST2, AR_PHY_TEST2_RX_OBS_SEL, 0); ++ ++ memset(buf, 0, len); ++ for (i = 0; i < len; i++) { ++ for (j = 0; j < 4; j++) { ++ u32 regval = REG_READ(ah, AR_PHY_TST_ADC); ++ ++ buf[i] <<= 2; ++ buf[i] |= (regval & 1) | ((regval & BIT(9)) >> 8); ++ udelay(1); ++ } ++ } ++} ++ + int ar5008_hw_attach_phy_ops(struct ath_hw *ah) + { + struct ath_hw_private_ops *priv_ops = ath9k_hw_private_ops(ah); ++ struct ath_hw_ops *ops = ath9k_hw_ops(ah); + static const u32 ar5416_cca_regs[6] = { + AR_PHY_CCA, + AR_PHY_CH1_CCA, +@@ -1316,6 +1337,8 @@ int ar5008_hw_attach_phy_ops(struct ath_ + if (ret) + return ret; + ++ ops->get_adc_entropy = ar5008_hw_get_adc_entropy; ++ + priv_ops->rf_set_freq = ar5008_hw_set_channel; + priv_ops->spur_mitigate_freq = ar5008_hw_spur_mitigate; + +--- a/drivers/net/wireless/ath/ath9k/ar9002_phy.h ++++ b/drivers/net/wireless/ath/ath9k/ar9002_phy.h +@@ -20,6 +20,12 @@ + #define PHY_AGC_CLR 0x10000000 + #define RFSILENT_BB 0x00002000 + ++#define AR_PHY_TEST_BBB_OBS_SEL 0x780000 ++#define AR_PHY_TEST_BBB_OBS_SEL_S 19 ++ ++#define AR_PHY_TEST_RX_OBS_SEL_BIT5_S 23 ++#define AR_PHY_TEST_RX_OBS_SEL_BIT5 (1 << AR_PHY_TEST_RX_OBS_SEL_BIT5_S) ++ + #define AR_PHY_TURBO 0x9804 + #define AR_PHY_FC_TURBO_MODE 0x00000001 + #define AR_PHY_FC_TURBO_SHORT 0x00000002 +@@ -36,6 +42,9 @@ + + #define AR_PHY_TEST2 0x9808 + ++#define AR_PHY_TEST2_RX_OBS_SEL 0x3C00 ++#define AR_PHY_TEST2_RX_OBS_SEL_S 10 ++ + #define AR_PHY_TIMING2 0x9810 + #define AR_PHY_TIMING3 0x9814 + #define AR_PHY_TIMING3_DSC_MAN 0xFFFE0000 +@@ -390,6 +399,8 @@ + #define AR_PHY_RFBUS_GRANT 0x9C20 + #define AR_PHY_RFBUS_GRANT_EN 0x00000001 + ++#define AR_PHY_TST_ADC 0x9C24 ++ + #define AR_PHY_CHAN_INFO_GAIN_DIFF 0x9CF4 + #define AR_PHY_CHAN_INFO_GAIN_DIFF_UPPER_LIMIT 320 + |