gluon/patches/openwrt/0043-ath9k-add-HSR-tuner-support-for-UniFi-Outdoor-Plus.patch

From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Thu, 3 Sep 2015 23:50:51 +0200
Subject: ath9k: add HSR tuner support for UniFi Outdoor Plus

Patch-by: Stefan Rompf <stefan@loplof.de>

diff --git a/package/kernel/mac80211/patches/931-ubnt-uap-plus-hsr.patch b/package/kernel/mac80211/patches/931-ubnt-uap-plus-hsr.patch
new file mode 100644
index 0000000..8e09fee
--- /dev/null
+++ b/package/kernel/mac80211/patches/931-ubnt-uap-plus-hsr.patch
@@ -0,0 +1,349 @@
+--- a/drivers/net/wireless/ath/ath9k/channel.c
++++ b/drivers/net/wireless/ath/ath9k/channel.c
+@@ -15,6 +15,8 @@
+  */
+ 
+ #include "ath9k.h"
++#include <linux/ath9k_platform.h>
++#include "hsr.h"
+ 
+ /* Set/change channels.  If the channel is really being changed, it's done
+  * by reseting the chip.  To accomplish this we must first cleanup any pending
+@@ -22,6 +24,7 @@
+  */
+ static int ath_set_channel(struct ath_softc *sc)
+ {
++	struct ath9k_platform_data *pdata = sc->dev->platform_data;
+ 	struct ath_hw *ah = sc->sc_ah;
+ 	struct ath_common *common = ath9k_hw_common(ah);
+ 	struct ieee80211_hw *hw = sc->hw;
+@@ -41,6 +44,11 @@ static int ath_set_channel(struct ath_so
+ 	ath_dbg(common, CONFIG, "Set channel: %d MHz width: %d\n",
+ 		chan->center_freq, chandef->width);
+ 
++	if (pdata && pdata->ubnt_hsr) {
++		hsr_enable(ah, chandef->width, chan->center_freq);
++		hsr_status(ah);
++	}
++
+ 	/* update survey stats for the old channel before switching */
+ 	spin_lock_bh(&common->cc_lock);
+ 	ath_update_survey_stats(sc);
+--- /dev/null
++++ b/drivers/net/wireless/ath/ath9k/hsr.c
+@@ -0,0 +1,223 @@
++/*
++ *
++ * The MIT License (MIT)
++ *
++ * Copyright (c) 2015 Kirill Berezin
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to deal
++ * in the Software without restriction, including without limitation the rights
++ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
++ * copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in all
++ * copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
++ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
++ * SOFTWARE.
++ *
++ */
++
++#include <linux/io.h>
++#include <linux/slab.h>
++#include <linux/module.h>
++#include <linux/time.h>
++#include <linux/bitops.h>
++#include <linux/etherdevice.h>
++#include <linux/rtnetlink.h>
++#include <asm/unaligned.h>
++
++#include "hw.h"
++#include "ath9k.h"
++
++#define HSR_GPIO_CSN 8
++#define HSR_GPIO_CLK 6
++#define HSR_GPIO_DOUT 7
++#define HSR_GPIO_DIN 5
++
++/* delays are in useconds */
++#define HSR_DELAY_HALF_TICK 100
++#define HSR_DELAY_PRE_WRITE 75
++#define HSR_DELAY_FINAL 20000
++#define HSR_DELAY_TRAILING 200
++
++
++void hsr_init(struct ath_hw* ah) {
++	ath9k_hw_gpio_request_in(ah, HSR_GPIO_DIN, NULL);
++	ath9k_hw_gpio_request_out(ah, HSR_GPIO_CSN, NULL,
++				  AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
++	ath9k_hw_gpio_request_out(ah, HSR_GPIO_CLK, NULL,
++				  AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
++	ath9k_hw_gpio_request_out(ah, HSR_GPIO_DOUT, NULL,
++				  AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
++
++	ath9k_hw_set_gpio(ah, HSR_GPIO_CSN, 1);
++	ath9k_hw_set_gpio(ah, HSR_GPIO_CLK, 0);
++	ath9k_hw_set_gpio(ah, HSR_GPIO_DOUT, 0);
++
++	udelay(HSR_DELAY_TRAILING);
++}
++
++static u32 hsr_write_byte(struct ath_hw* ah, int delay, u32 value){
++	struct ath_common *common = ath9k_hw_common(ah);
++	int i;
++	u32 rval = 0;
++
++	udelay(delay);
++
++	ath9k_hw_set_gpio(ah, HSR_GPIO_CLK, 0);
++	udelay(HSR_DELAY_HALF_TICK);
++
++	ath9k_hw_set_gpio(ah, HSR_GPIO_CSN, 0);
++	udelay(HSR_DELAY_HALF_TICK);
++
++	for( i = 0; i < 8; ++i) {
++		rval = rval << 1;
++
++		// pattern is left to right, that is 7-th bit runs first
++		ath9k_hw_set_gpio(ah, HSR_GPIO_DOUT, (value >> (7 - i)) & 0x1);
++		udelay(HSR_DELAY_HALF_TICK);
++
++		ath9k_hw_set_gpio(ah, HSR_GPIO_CLK, 1);
++		udelay(HSR_DELAY_HALF_TICK);
++
++		rval |= ath9k_hw_gpio_get(ah, HSR_GPIO_DIN);
++
++		ath9k_hw_set_gpio(ah, HSR_GPIO_CLK, 0);
++		udelay(HSR_DELAY_HALF_TICK);
++	}
++
++	ath9k_hw_set_gpio(ah, HSR_GPIO_CSN, 1);
++	udelay(HSR_DELAY_HALF_TICK);
++
++	ath_dbg(common, CONFIG, "hsr_write_byte: write byte %d return value is %d %c\n",
++		value, rval, rval > 32 ? rval : '-');
++
++	return rval & 0xff;
++}
++
++static int hsr_write_a_chain(struct ath_hw* ah, char* chain, int items) {
++	int i = 0;
++	int status = 0;
++
++	// a preamble
++	hsr_write_byte(ah, HSR_DELAY_PRE_WRITE, 0);
++	status = hsr_write_byte(ah, HSR_DELAY_PRE_WRITE, 0);
++
++	// clear HSR's reply buffer
++	if (status) {
++		int loop = 0;
++		for ( loop = 0; (loop < 42) && status; ++loop) {
++			status = hsr_write_byte(ah, HSR_DELAY_PRE_WRITE, 0);
++		}
++		if ( loop >= 42) {
++			ATH_DBG_WARN(1, "hsr_write_a_chain: can't clear an output buffer after a 42 cycles.\n");
++			return -1;
++		}
++	}
++
++	for ( i =0; (i < items) && ( 0 != chain[i]); ++i) {
++		hsr_write_byte(ah, HSR_DELAY_PRE_WRITE, (u32)chain[i]);
++	}
++
++	hsr_write_byte(ah, HSR_DELAY_PRE_WRITE, 0);
++	mdelay(HSR_DELAY_FINAL / 1000);
++
++	// reply
++	memset(chain, 0, items);
++
++	hsr_write_byte(ah, HSR_DELAY_PRE_WRITE, 0);
++	udelay(HSR_DELAY_TRAILING);
++
++	for ( i = 0; i < (items - 1); ++i) {
++		u32 ret;
++		if ( 0 != (ret = hsr_write_byte(ah, HSR_DELAY_PRE_WRITE, 0))) {
++			chain[i] = (char)ret;
++		} else {
++			break;
++		}
++		udelay(HSR_DELAY_TRAILING);
++	}
++
++	return (1 < i) ? simple_strtol(chain + 1, NULL, 10) : 0;
++}
++
++int hsr_disable(struct ath_hw* ah) {
++	char cmd[10] = {'b', '4', '0', 0, 0, 0, 0, 0, 0, 0};
++	int  ret;
++
++	ret = hsr_write_a_chain(ah, cmd, sizeof(cmd));
++	if ( (ret > 0) && (*cmd == 'B')) {
++		return 0;
++	}
++
++	return -1;
++}
++
++int hsr_enable(struct ath_hw* ah, int bw, int fq) {
++	char cmd[10];
++	int ret;
++
++	/* Bandwidth argument is 0 sometimes. Assume default 802.11bgn
++	   20MHz on invalid values */
++	if ( (bw != 5) && (bw != 10) && (bw != 20) && (bw != 40)) {
++		bw = 20;
++	}
++
++	memset(cmd, 0, sizeof(cmd));
++	*cmd = 'b'; // 98
++	snprintf(cmd + 1, 3, "%02d", bw);
++
++	ret = hsr_write_a_chain(ah, cmd, sizeof(cmd));
++	if ( (*cmd != 'B') || (ret != bw)) {
++		ATH_DBG_WARN(1, "hsr_enable: failed changing bandwidth -> set (%d,%d) reply (%d, %d) \n", 'b', bw, *cmd, ret);
++		return -1;
++	}
++
++	memset(cmd, 0, sizeof(cmd));
++	*cmd = 'x'; // 120
++	ret = hsr_write_a_chain(ah, cmd, sizeof(cmd));
++	if ( *cmd != 'X') {
++		ATH_DBG_WARN(1, "hsr_enable: failed 'x' command -> reply (%d, %d) \n", *cmd, ret);
++		return -1;
++	}
++
++	memset(cmd, 0, sizeof(cmd));
++	*cmd = 'm'; // 109
++	ret = hsr_write_a_chain(ah, cmd, sizeof(cmd));
++	if ( *cmd != 'M') {
++		ATH_DBG_WARN(1, "hsr_enable: failed 'm' command -> reply (%d, %d) \n", *cmd, ret);
++		return  -1;
++	}
++
++	memset(cmd, 0, sizeof(cmd));
++	*cmd = 'f'; // 102
++	snprintf(cmd + 1, 6, "%05d", fq);
++	ret = hsr_write_a_chain(ah, cmd, sizeof(cmd));
++	if ( (*cmd != 'F') && (ret != fq)) {
++		ATH_DBG_WARN(1, "hsr_enable: failed set frequency -> reply (%d, %d) \n", *cmd, ret);
++		return -1;
++	}
++
++	return 0;
++}
++
++int hsr_status(struct ath_hw* ah) {
++	char cmd[10] = {'s', 0, 0, 0, 0, 0, 0, 0, 0, 0}; // 115
++	int ret;
++
++	ret = hsr_write_a_chain(ah, cmd, sizeof(cmd));
++	if ( (*cmd != 'S')) {
++		ATH_DBG_WARN(1, "hsr_status: returned %d,%d \n", *cmd, ret);
++		return -1;
++	}
++
++	return 0;
++}
++
+--- /dev/null
++++ b/drivers/net/wireless/ath/ath9k/hsr.h
+@@ -0,0 +1,33 @@
++/*
++ * The MIT License (MIT)
++ *
++ * Copyright (c) 2015 Kirill Berezin
++ *
++ * Permission is hereby granted, free of charge, to any person obtaining a copy
++ * of this software and associated documentation files (the "Software"), to deal
++ * in the Software without restriction, including without limitation the rights
++ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
++ * copies of the Software, and to permit persons to whom the Software is
++ * furnished to do so, subject to the following conditions:
++ *
++ * The above copyright notice and this permission notice shall be included in all
++ * copies or substantial portions of the Software.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
++ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
++ * SOFTWARE.
++ */
++
++#ifndef HSR_H_
++#define HSR_H_
++
++void hsr_init(struct ath_hw* ah);
++int hsr_disable(struct ath_hw* ah);
++int hsr_enable(struct ath_hw* ah, int bw, int fq);
++int hsr_status(struct ath_hw* ah);
++
++#endif /* HSR_H_ */
+--- a/drivers/net/wireless/ath/ath9k/main.c
++++ b/drivers/net/wireless/ath/ath9k/main.c
+@@ -16,8 +16,10 @@
+ 
+ #include <linux/nl80211.h>
+ #include <linux/delay.h>
++#include <linux/ath9k_platform.h>
+ #include "ath9k.h"
+ #include "btcoex.h"
++#include "hsr.h"
+ 
+ u8 ath9k_parse_mpdudensity(u8 mpdudensity)
+ {
+@@ -652,6 +654,7 @@ void ath_reset_work(struct work_struct *
+ static int ath9k_start(struct ieee80211_hw *hw)
+ {
+ 	struct ath_softc *sc = hw->priv;
++	struct ath9k_platform_data *pdata = sc->dev->platform_data;
+ 	struct ath_hw *ah = sc->sc_ah;
+ 	struct ath_common *common = ath9k_hw_common(ah);
+ 	struct ieee80211_channel *curchan = sc->cur_chan->chandef.chan;
+@@ -727,6 +730,11 @@ static int ath9k_start(struct ieee80211_
+ 		ath9k_hw_set_gpio(ah, ah->led_pin,
+ 				  (ah->config.led_active_high) ? 1 : 0);
+ 
++	if (pdata && pdata->ubnt_hsr) {
++		hsr_init(ah);
++		hsr_disable(ah);
++	}
++
+ 	/*
+ 	 * Reset key cache to sane defaults (all entries cleared) instead of
+ 	 * semi-random values after suspend/resume.
+--- a/drivers/net/wireless/ath/ath9k/Makefile
++++ b/drivers/net/wireless/ath/ath9k/Makefile
+@@ -6,7 +6,8 @@ ath9k-y +=	beacon.o \
+ 		xmit.o \
+ 		link.o \
+ 		antenna.o \
+-		channel.o
++		channel.o \
++		hsr.o
+ 
+ ath9k-$(CPTCFG_ATH9K_BTCOEX_SUPPORT) += mci.o
+ ath9k-$(CPTCFG_ATH9K_PCI) += pci.o
+--- a/include/linux/ath9k_platform.h
++++ b/include/linux/ath9k_platform.h
+@@ -54,6 +54,8 @@ struct ath9k_platform_data {
+ 	unsigned num_btns;
+ 	const struct gpio_keys_button *btns;
+ 	unsigned btn_poll_interval;
++
++	bool ubnt_hsr;
+ };
+ 
+ #endif /* _LINUX_ATH9K_PLATFORM_H */
diff --git a/target/linux/ar71xx/patches-3.18/608-MIPS-ath79-ubnt-xm-add-more-boards.patch b/target/linux/ar71xx/patches-3.18/608-MIPS-ath79-ubnt-xm-add-more-boards.patch
index 7803513..d865ed2 100644
--- a/target/linux/ar71xx/patches-3.18/608-MIPS-ath79-ubnt-xm-add-more-boards.patch
+++ b/target/linux/ar71xx/patches-3.18/608-MIPS-ath79-ubnt-xm-add-more-boards.patch
@@ -254,6 +254,7 @@
 +	ath79_register_eth(0);
 +	ath79_register_eth(1);
 +
++	ap9x_pci_get_wmac_data(0)->ubnt_hsr = true;
 +	ap91_pci_init(ee, NULL);
 +
 +	ath79_register_leds_gpio(-1, ARRAY_SIZE(ubnt_unifi_outdoor_plus_leds_gpio),
diff --git a/target/linux/generic/patches-3.18/150-ath9k_ubnt_hsr_filter.patch b/target/linux/generic/patches-3.18/150-ath9k_ubnt_hsr_filter.patch
new file mode 100644
index 0000000..b8844f1
--- /dev/null
+++ b/target/linux/generic/patches-3.18/150-ath9k_ubnt_hsr_filter.patch
@@ -0,0 +1,16 @@
+Flag that this platform is an Ubiquiti UniFi Outdoor Plus
+containing a RF filter in ath9k's receive path.
+
+Signed-off-by: Stefan Rompf <stefan@loplof.de>
+
+--- a/include/linux/ath9k_platform.h
++++ b/include/linux/ath9k_platform.h
+@@ -54,6 +54,8 @@ struct ath9k_platform_data {
+ 	unsigned num_btns;
+ 	const struct gpio_keys_button *btns;
+ 	unsigned btn_poll_interval;
++
++	bool ubnt_hsr;
+ };
+ 
+ #endif /* _LINUX_ATH9K_PLATFORM_H */