ar9170: ar9170: mac80211 interaction code

This patch contains almost all mac80211 interaction code of AR9170.
Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ar9170/ar9170.h

+/*
+ * Atheros AR9170 driver
+ *
+ * Driver specific definitions
+ *
+ * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, see
+ * http://www.gnu.org/licenses/.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ *    Copyright (c) 2007-2008 Atheros Communications, Inc.
+ *
+ *    Permission to use, copy, modify, and/or distribute this software for any
+ *    purpose with or without fee is hereby granted, provided that the above
+ *    copyright notice and this permission notice appear in all copies.
+ *
+ *    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *    WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *    MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *    ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+#ifndef __AR9170_H
+#define __AR9170_H
+
+#include <linux/completion.h>
+#include <linux/spinlock.h>
+#include <net/wireless.h>
+#include <net/mac80211.h>
+#ifdef CONFIG_AR9170_LEDS
+#include <linux/leds.h>
+#endif /* CONFIG_AR9170_LEDS */
+#include "eeprom.h"
+#include "hw.h"
+
+#define PAYLOAD_MAX	(AR9170_MAX_CMD_LEN/4 - 1)
+
+enum ar9170_bw {
+	AR9170_BW_20,
+	AR9170_BW_40_BELOW,
+	AR9170_BW_40_ABOVE,
+
+	__AR9170_NUM_BW,
+};
+
+enum ar9170_rf_init_mode {
+	AR9170_RFI_NONE,
+	AR9170_RFI_WARM,
+	AR9170_RFI_COLD,
+};
+
+#define AR9170_MAX_RX_BUFFER_SIZE		8192
+
+#ifdef CONFIG_AR9170_LEDS
+struct ar9170;
+
+struct ar9170_led {
+	struct ar9170 *ar;
+	struct led_classdev l;
+	char name[32];
+	unsigned int toggled;
+	bool registered;
+};
+
+#endif /* CONFIG_AR9170_LEDS */
+
+enum ar9170_device_state {
+	AR9170_UNKNOWN_STATE,
+	AR9170_STOPPED,
+	AR9170_IDLE,
+	AR9170_STARTED,
+	AR9170_ASSOCIATED,
+};
+
+struct ar9170 {
+	struct ieee80211_hw *hw;
+	struct mutex mutex;
+	enum ar9170_device_state state;
+
+	int (*open)(struct ar9170 *);
+	void (*stop)(struct ar9170 *);
+	int (*tx)(struct ar9170 *, struct sk_buff *, bool, unsigned int);
+	int (*exec_cmd)(struct ar9170 *, enum ar9170_cmd, u32 ,
+			void *, u32 , void *);
+	void (*callback_cmd)(struct ar9170 *, u32 , void *);
+
+	/* interface mode settings */
+	struct ieee80211_vif *vif;
+	u8 mac_addr[ETH_ALEN];
+	u8 bssid[ETH_ALEN];
+
+	/* beaconing */
+	struct sk_buff *beacon;
+	struct work_struct beacon_work;
+
+	/* cryptographic engine */
+	u64 usedkeys;
+	bool rx_software_decryption;
+	bool disable_offload;
+
+	/* filter settings */
+	struct work_struct filter_config_work;
+	u64 cur_mc_hash, want_mc_hash;
+	u32 cur_filter, want_filter;
+	unsigned int filter_changed;
+	bool sniffer_enabled;
+
+	/* PHY */
+	struct ieee80211_channel *channel;
+	int noise[4];
+
+	/* power calibration data */
+	u8 power_5G_leg[4];
+	u8 power_2G_cck[4];
+	u8 power_2G_ofdm[4];
+	u8 power_5G_ht20[8];
+	u8 power_5G_ht40[8];
+	u8 power_2G_ht20[8];
+	u8 power_2G_ht40[8];
+
+#ifdef CONFIG_AR9170_LEDS
+	struct delayed_work led_work;
+	struct ar9170_led leds[AR9170_NUM_LEDS];
+#endif /* CONFIG_AR9170_LEDS */
+
+	/* qos queue settings */
+	spinlock_t tx_stats_lock;
+	struct ieee80211_tx_queue_stats tx_stats[5];
+	struct ieee80211_tx_queue_params edcf[5];
+
+	spinlock_t cmdlock;
+	__le32 cmdbuf[PAYLOAD_MAX + 1];
+
+	/* MAC statistics */
+	struct ieee80211_low_level_stats stats;
+
+	/* EEPROM */
+	struct ar9170_eeprom eeprom;
+
+	/* global tx status for unregistered Stations. */
+	struct sk_buff_head global_tx_status;
+	struct sk_buff_head global_tx_status_waste;
+	struct delayed_work tx_status_janitor;
+};
+
+struct ar9170_sta_info {
+	struct sk_buff_head tx_status;
+};
+
+#define IS_STARTED(a)		(a->state >= AR9170_STARTED)
+#define IS_ACCEPTING_CMD(a)	(a->state >= AR9170_IDLE)
+
+#define AR9170_FILTER_CHANGED_PROMISC		BIT(0)
+#define AR9170_FILTER_CHANGED_MULTICAST		BIT(1)
+#define AR9170_FILTER_CHANGED_FRAMEFILTER	BIT(2)
+
+/* exported interface */
+void *ar9170_alloc(size_t priv_size);
+int ar9170_register(struct ar9170 *ar, struct device *pdev);
+void ar9170_rx(struct ar9170 *ar, struct sk_buff *skb);
+void ar9170_unregister(struct ar9170 *ar);
+void ar9170_handle_tx_status(struct ar9170 *ar, struct sk_buff *skb,
+			     bool update_statistics, u16 tx_status);
+
+/* MAC */
+int ar9170_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb);
+int ar9170_init_mac(struct ar9170 *ar);
+int ar9170_set_qos(struct ar9170 *ar);
+int ar9170_update_multicast(struct ar9170 *ar);
+int ar9170_update_frame_filter(struct ar9170 *ar);
+int ar9170_set_operating_mode(struct ar9170 *ar);
+int ar9170_set_beacon_timers(struct ar9170 *ar);
+int ar9170_set_hwretry_limit(struct ar9170 *ar, u32 max_retry);
+int ar9170_update_beacon(struct ar9170 *ar);
+void ar9170_new_beacon(struct work_struct *work);
+int ar9170_upload_key(struct ar9170 *ar, u8 id, const u8 *mac, u8 ktype,
+		      u8 keyidx, u8 *keydata, int keylen);
+int ar9170_disable_key(struct ar9170 *ar, u8 id);
+
+/* LEDs */
+#ifdef CONFIG_AR9170_LEDS
+int ar9170_register_leds(struct ar9170 *ar);
+void ar9170_unregister_leds(struct ar9170 *ar);
+#endif /* CONFIG_AR9170_LEDS */
+int ar9170_init_leds(struct ar9170 *ar);
+int ar9170_set_leds_state(struct ar9170 *ar, u32 led_state);
+
+/* PHY / RF */
+int ar9170_init_phy(struct ar9170 *ar, enum ieee80211_band band);
+int ar9170_init_rf(struct ar9170 *ar);
+int ar9170_set_channel(struct ar9170 *ar, struct ieee80211_channel *channel,
+		       enum ar9170_rf_init_mode rfi, enum ar9170_bw bw);
+
+#endif /* __AR9170_H */

drivers/net/wireless/ar9170/cmd.c

+/*
+ * Atheros AR9170 driver
+ *
+ * Basic HW register/memory/command access functions
+ *
+ * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, see
+ * http://www.gnu.org/licenses/.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ *    Copyright (c) 2007-2008 Atheros Communications, Inc.
+ *
+ *    Permission to use, copy, modify, and/or distribute this software for any
+ *    purpose with or without fee is hereby granted, provided that the above
+ *    copyright notice and this permission notice appear in all copies.
+ *
+ *    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *    WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *    MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *    ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "ar9170.h"
+#include "cmd.h"
+
+int ar9170_write_mem(struct ar9170 *ar, const __le32 *data, size_t len)
+{
+	int err;
+
+	if (unlikely(!IS_ACCEPTING_CMD(ar)))
+		return 0;
+
+	err = ar->exec_cmd(ar, AR9170_CMD_WMEM, len, (u8 *) data, 0, NULL);
+	if (err)
+		printk(KERN_DEBUG "%s: writing memory failed\n",
+		       wiphy_name(ar->hw->wiphy));
+	return err;
+}
+
+int ar9170_write_reg(struct ar9170 *ar, const u32 reg, const u32 val)
+{
+	__le32 buf[2] = {
+		cpu_to_le32(reg),
+		cpu_to_le32(val),
+	};
+	int err;
+
+	if (unlikely(!IS_ACCEPTING_CMD(ar)))
+		return 0;
+
+	err = ar->exec_cmd(ar, AR9170_CMD_WREG, sizeof(buf),
+			   (u8 *) buf, 0, NULL);
+	if (err)
+		printk(KERN_DEBUG "%s: writing reg %#x (val %#x) failed\n",
+		       wiphy_name(ar->hw->wiphy), reg, val);
+	return err;
+}
+
+static int ar9170_read_mreg(struct ar9170 *ar, int nregs,
+			    const u32 *regs, u32 *out)
+{
+	int i, err;
+	__le32 *offs, *res;
+
+	if (unlikely(!IS_ACCEPTING_CMD(ar)))
+		return 0;
+
+	/* abuse "out" for the register offsets, must be same length */
+	offs = (__le32 *)out;
+	for (i = 0; i < nregs; i++)
+		offs[i] = cpu_to_le32(regs[i]);
+
+	/* also use the same buffer for the input */
+	res = (__le32 *)out;
+
+	err = ar->exec_cmd(ar, AR9170_CMD_RREG,
+			   4 * nregs, (u8 *)offs,
+			   4 * nregs, (u8 *)res);
+	if (err)
+		return err;
+
+	/* convert result to cpu endian */
+	for (i = 0; i < nregs; i++)
+		out[i] = le32_to_cpu(res[i]);
+
+	return 0;
+}
+
+int ar9170_read_reg(struct ar9170 *ar, u32 reg, u32 *val)
+{
+	return ar9170_read_mreg(ar, 1, &reg, val);
+}
+
+int ar9170_echo_test(struct ar9170 *ar, u32 v)
+{
+	__le32 echobuf = cpu_to_le32(v);
+	__le32 echores;
+	int err;
+
+	if (unlikely(!IS_ACCEPTING_CMD(ar)))
+		return -ENODEV;
+
+	err = ar->exec_cmd(ar, AR9170_CMD_ECHO,
+			   4, (u8 *)&echobuf,
+			   4, (u8 *)&echores);
+	if (err)
+		return err;
+
+	if (echobuf != echores)
+		return -EINVAL;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ar9170_echo_test);

drivers/net/wireless/ar9170/cmd.h

+/*
+ * Atheros AR9170 driver
+ *
+ * Basic HW register/memory/command access functions
+ *
+ * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, see
+ * http://www.gnu.org/licenses/.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ *    Copyright (c) 2007-2008 Atheros Communications, Inc.
+ *
+ *    Permission to use, copy, modify, and/or distribute this software for any
+ *    purpose with or without fee is hereby granted, provided that the above
+ *    copyright notice and this permission notice appear in all copies.
+ *
+ *    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *    WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *    MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *    ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+#ifndef __CMD_H
+#define __CMD_H
+
+#include "ar9170.h"
+
+/* basic HW access */
+int ar9170_write_mem(struct ar9170 *ar, const __le32 *data, size_t len);
+int ar9170_write_reg(struct ar9170 *ar, const u32 reg, const u32 val);
+int ar9170_read_reg(struct ar9170 *ar, u32 reg, u32 *val);
+int ar9170_echo_test(struct ar9170 *ar, u32 v);
+
+/*
+ * Macros to facilitate writing multiple registers in a single
+ * write-combining USB command. Note that when the first group
+ * fails the whole thing will fail without any others attempted,
+ * but you won't know which write in the group failed.
+ */
+#define ar9170_regwrite_begin(ar)					\
+do {									\
+	int __nreg = 0, __err = 0;					\
+	struct ar9170 *__ar = ar;
+
+#define ar9170_regwrite(r, v) do {					\
+	__ar->cmdbuf[2 * __nreg + 1] = cpu_to_le32(r);			\
+	__ar->cmdbuf[2 * __nreg + 2] = cpu_to_le32(v);			\
+	__nreg++;							\
+	if ((__nreg >= PAYLOAD_MAX/2)) {				\
+		if (IS_ACCEPTING_CMD(__ar))				\
+			__err = ar->exec_cmd(__ar, AR9170_CMD_WREG,	\
+					     8 * __nreg,		\
+					     (u8 *) &__ar->cmdbuf[1],	\
+					     0, NULL);			\
+		__nreg = 0;						\
+		if (__err)						\
+			goto __regwrite_out;				\
+	}								\
+} while (0)
+
+#define ar9170_regwrite_finish()					\
+__regwrite_out :							\
+	if (__nreg) {							\
+		if (IS_ACCEPTING_CMD(__ar))				\
+			__err = ar->exec_cmd(__ar, AR9170_CMD_WREG,	\
+					     8 * __nreg, 		\
+					     (u8 *) &__ar->cmdbuf[1],	\
+					     0, NULL);			\
+		__nreg = 0;						\
+	}
+
+#define ar9170_regwrite_result()					\
+	__err;								\
+} while (0);
+
+#endif /* __CMD_H */

drivers/net/wireless/ar9170/led.c

+/*
+ * Atheros AR9170 driver
+ *
+ * LED handling
+ *
+ * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, see
+ * http://www.gnu.org/licenses/.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ *    Copyright (c) 2007-2008 Atheros Communications, Inc.
+ *
+ *    Permission to use, copy, modify, and/or distribute this software for any
+ *    purpose with or without fee is hereby granted, provided that the above
+ *    copyright notice and this permission notice appear in all copies.
+ *
+ *    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *    WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *    MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *    ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "ar9170.h"
+#include "cmd.h"
+
+int ar9170_set_leds_state(struct ar9170 *ar, u32 led_state)
+{
+	return ar9170_write_reg(ar, AR9170_GPIO_REG_DATA, led_state);
+}
+
+int ar9170_init_leds(struct ar9170 *ar)
+{
+	int err;
+
+	/* disable LEDs */
+	/* GPIO [0/1 mode: output, 2/3: input] */
+	err = ar9170_write_reg(ar, AR9170_GPIO_REG_PORT_TYPE, 3);
+	if (err)
+		goto out;
+
+	/* GPIO 0/1 value: off */
+	err = ar9170_set_leds_state(ar, 0);
+
+out:
+	return err;
+}
+
+#ifdef CONFIG_AR9170_LEDS
+static void ar9170_update_leds(struct work_struct *work)
+{
+	struct ar9170 *ar = container_of(work, struct ar9170, led_work.work);
+	int i, tmp, blink_delay = 1000;
+	u32 led_val = 0;
+	bool rerun = false;
+
+	if (unlikely(!IS_ACCEPTING_CMD(ar)))
+		return ;
+
+	mutex_lock(&ar->mutex);
+	for (i = 0; i < AR9170_NUM_LEDS; i++)
+		if (ar->leds[i].toggled) {
+			led_val |= 1 << i;
+
+			tmp = 70 + 200 / (ar->leds[i].toggled);
+			if (tmp < blink_delay)
+				blink_delay = tmp;
+
+			if (ar->leds[i].toggled > 1)
+				ar->leds[i].toggled = 0;
+
+			rerun = true;
+		}
+
+	ar9170_set_leds_state(ar, led_val);
+	mutex_unlock(&ar->mutex);
+
+	if (rerun)
+		queue_delayed_work(ar->hw->workqueue, &ar->led_work,
+				   msecs_to_jiffies(blink_delay));
+}
+
+static void ar9170_led_brightness_set(struct led_classdev *led,
+				      enum led_brightness brightness)
+{
+	struct ar9170_led *arl = container_of(led, struct ar9170_led, l);
+	struct ar9170 *ar = arl->ar;
+
+	arl->toggled++;
+
+	if (likely(IS_ACCEPTING_CMD(ar) && brightness))
+		queue_delayed_work(ar->hw->workqueue, &ar->led_work, HZ/10);
+}
+
+static int ar9170_register_led(struct ar9170 *ar, int i, char *name,
+			       char *trigger)
+{
+	int err;
+
+	snprintf(ar->leds[i].name, sizeof(ar->leds[i].name),
+		 "ar9170-%s::%s", wiphy_name(ar->hw->wiphy), name);
+
+	ar->leds[i].ar = ar;
+	ar->leds[i].l.name = ar->leds[i].name;
+	ar->leds[i].l.brightness_set = ar9170_led_brightness_set;
+	ar->leds[i].l.brightness = 0;
+	ar->leds[i].l.default_trigger = trigger;
+
+	err = led_classdev_register(wiphy_dev(ar->hw->wiphy),
+				    &ar->leds[i].l);
+	if (err)
+		printk(KERN_ERR "%s: failed to register %s LED (%d).\n",
+		       wiphy_name(ar->hw->wiphy), ar->leds[i].name, err);
+	else
+		ar->leds[i].registered = true;
+
+	return err;
+}
+
+void ar9170_unregister_leds(struct ar9170 *ar)
+{
+	int i;
+
+	cancel_delayed_work_sync(&ar->led_work);
+
+	for (i = 0; i < AR9170_NUM_LEDS; i++)
+		if (ar->leds[i].registered) {
+			led_classdev_unregister(&ar->leds[i].l);
+			ar->leds[i].registered = false;
+		}
+}
+
+int ar9170_register_leds(struct ar9170 *ar)
+{
+	int err;
+
+	INIT_DELAYED_WORK(&ar->led_work, ar9170_update_leds);
+
+	err = ar9170_register_led(ar, 0, "tx",
+				  ieee80211_get_tx_led_name(ar->hw));
+	if (err)
+		goto fail;
+
+	err = ar9170_register_led(ar, 1, "assoc",
+				 ieee80211_get_assoc_led_name(ar->hw));
+	if (err)
+		goto fail;
+
+	return 0;
+
+fail:
+	ar9170_unregister_leds(ar);
+	return err;
+}
+
+#endif /* CONFIG_AR9170_LEDS */