diff options
Diffstat (limited to 'package/kernel/mac80211/patches/315-ath9k_hw-issue-external-reset-for-QCA955x.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/315-ath9k_hw-issue-external-reset-for-QCA955x.patch | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/315-ath9k_hw-issue-external-reset-for-QCA955x.patch b/package/kernel/mac80211/patches/315-ath9k_hw-issue-external-reset-for-QCA955x.patch new file mode 100644 index 0000000000..6a958a4132 --- /dev/null +++ b/package/kernel/mac80211/patches/315-ath9k_hw-issue-external-reset-for-QCA955x.patch @@ -0,0 +1,125 @@ +From: Felix Fietkau <nbd@nbd.name> +Date: Sat, 9 Jul 2016 15:26:44 +0200 +Subject: [PATCH] ath9k_hw: issue external reset for QCA955x + +The RTC interface on the SoC needs to be reset along with the rest of +the WMAC. + +Signed-off-by: Felix Fietkau <nbd@nbd.name> +--- + +--- a/drivers/net/wireless/ath/ath9k/hw.c ++++ b/drivers/net/wireless/ath/ath9k/hw.c +@@ -1271,39 +1271,56 @@ void ath9k_hw_get_delta_slope_vals(struc + *coef_exponent = coef_exp - 16; + } + +-/* AR9330 WAR: +- * call external reset function to reset WMAC if: +- * - doing a cold reset +- * - we have pending frames in the TX queues. +- */ +-static bool ath9k_hw_ar9330_reset_war(struct ath_hw *ah, int type) ++static bool ath9k_hw_need_external_reset(struct ath_hw *ah, int type) + { +- int i, npend = 0; ++ int i; + +- for (i = 0; i < AR_NUM_QCU; i++) { +- npend = ath9k_hw_numtxpending(ah, i); +- if (npend) +- break; ++ if (type == ATH9K_RESET_COLD) ++ return true; ++ ++ if (AR_SREV_9550(ah)) ++ return true; ++ ++ /* AR9330 WAR: ++ * call external reset function to reset WMAC if: ++ * - doing a cold reset ++ * - we have pending frames in the TX queues. ++ */ ++ if (AR_SREV_9330(ah)) { ++ for (i = 0; i < AR_NUM_QCU; i++) { ++ if (ath9k_hw_numtxpending(ah, i)) ++ return true; ++ } + } + +- if (ah->external_reset && +- (npend || type == ATH9K_RESET_COLD)) { +- int reset_err = 0; ++ return false; ++} + +- ath_dbg(ath9k_hw_common(ah), RESET, +- "reset MAC via external reset\n"); ++static bool ath9k_hw_external_reset(struct ath_hw *ah, int type) ++{ ++ int err; + +- reset_err = ah->external_reset(); +- if (reset_err) { +- ath_err(ath9k_hw_common(ah), +- "External reset failed, err=%d\n", +- reset_err); +- return false; +- } ++ if (!ah->external_reset || !ath9k_hw_need_external_reset(ah, type)) ++ return true; + +- REG_WRITE(ah, AR_RTC_RESET, 1); ++ ath_dbg(ath9k_hw_common(ah), RESET, ++ "reset MAC via external reset\n"); ++ ++ err = ah->external_reset(); ++ if (err) { ++ ath_err(ath9k_hw_common(ah), ++ "External reset failed, err=%d\n", err); ++ return false; ++ } ++ ++ if (AR_SREV_9550(ah)) { ++ REG_WRITE(ah, AR_RTC_RESET, 0); ++ udelay(10); + } + ++ REG_WRITE(ah, AR_RTC_RESET, 1); ++ udelay(10); ++ + return true; + } + +@@ -1356,24 +1373,23 @@ static bool ath9k_hw_set_reset(struct at + rst_flags |= AR_RTC_RC_MAC_COLD; + } + +- if (AR_SREV_9330(ah)) { +- if (!ath9k_hw_ar9330_reset_war(ah, type)) +- return false; +- } +- + if (ath9k_hw_mci_is_enabled(ah)) + ar9003_mci_check_gpm_offset(ah); + + /* DMA HALT added to resolve ar9300 and ar9580 bus error during +- * RTC_RC reg read ++ * RTC_RC reg read. Also needed for AR9550 external reset + */ +- if (AR_SREV_9300(ah) || AR_SREV_9580(ah)) { ++ if (AR_SREV_9300(ah) || AR_SREV_9580(ah) || AR_SREV_9550(ah)) { + REG_SET_BIT(ah, AR_CFG, AR_CFG_HALT_REQ); + ath9k_hw_wait(ah, AR_CFG, AR_CFG_HALT_ACK, AR_CFG_HALT_ACK, + 20 * AH_WAIT_TIMEOUT); +- REG_CLR_BIT(ah, AR_CFG, AR_CFG_HALT_REQ); + } + ++ ath9k_hw_external_reset(ah, type); ++ ++ if (AR_SREV_9300(ah) || AR_SREV_9580(ah)) ++ REG_CLR_BIT(ah, AR_CFG, AR_CFG_HALT_REQ); ++ + REG_WRITE(ah, AR_RTC_RC, rst_flags); + + REGWRITE_BUFFER_FLUSH(ah); |