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path: root/drivers/net/wireless/p54/main.c
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Diffstat (limited to 'drivers/net/wireless/p54/main.c')
-rw-r--r--drivers/net/wireless/p54/main.c648
1 files changed, 648 insertions, 0 deletions
diff --git a/drivers/net/wireless/p54/main.c b/drivers/net/wireless/p54/main.c
new file mode 100644
index 000000000000..4d486bf9f725
--- /dev/null
+++ b/drivers/net/wireless/p54/main.c
@@ -0,0 +1,648 @@
+/*
+ * mac80211 glue code for mac80211 Prism54 drivers
+ *
+ * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
+ * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>
+ * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
+ *
+ * Based on:
+ * - the islsm (softmac prism54) driver, which is:
+ * Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
+ * - stlc45xx driver
+ * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/firmware.h>
+#include <linux/etherdevice.h>
+
+#include <net/mac80211.h>
+
+#include "p54.h"
+#include "lmac.h"
+
+static int modparam_nohwcrypt;
+module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO);
+MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
+MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
+MODULE_DESCRIPTION("Softmac Prism54 common code");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("prism54common");
+
+static void p54_sta_notify(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
+ enum sta_notify_cmd notify_cmd,
+ struct ieee80211_sta *sta)
+{
+ struct p54_common *priv = dev->priv;
+ switch (notify_cmd) {
+ case STA_NOTIFY_ADD:
+ case STA_NOTIFY_REMOVE:
+ /*
+ * Notify the firmware that we don't want or we don't
+ * need to buffer frames for this station anymore.
+ */
+
+ p54_sta_unlock(priv, sta->addr);
+ break;
+ case STA_NOTIFY_AWAKE:
+ /* update the firmware's filter table */
+ p54_sta_unlock(priv, sta->addr);
+ break;
+ default:
+ break;
+ }
+}
+
+static int p54_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
+ bool set)
+{
+ struct p54_common *priv = dev->priv;
+
+ return p54_update_beacon_tim(priv, sta->aid, set);
+}
+
+u8 *p54_find_ie(struct sk_buff *skb, u8 ie)
+{
+ struct ieee80211_mgmt *mgmt = (void *)skb->data;
+ u8 *pos, *end;
+
+ if (skb->len <= sizeof(mgmt))
+ return NULL;
+
+ pos = (u8 *)mgmt->u.beacon.variable;
+ end = skb->data + skb->len;
+ while (pos < end) {
+ if (pos + 2 + pos[1] > end)
+ return NULL;
+
+ if (pos[0] == ie)
+ return pos;
+
+ pos += 2 + pos[1];
+ }
+ return NULL;
+}
+
+static int p54_beacon_format_ie_tim(struct sk_buff *skb)
+{
+ /*
+ * the good excuse for this mess is ... the firmware.
+ * The dummy TIM MUST be at the end of the beacon frame,
+ * because it'll be overwritten!
+ */
+ u8 *tim;
+ u8 dtim_len;
+ u8 dtim_period;
+ u8 *next;
+
+ tim = p54_find_ie(skb, WLAN_EID_TIM);
+ if (!tim)
+ return 0;
+
+ dtim_len = tim[1];
+ dtim_period = tim[3];
+ next = tim + 2 + dtim_len;
+
+ if (dtim_len < 3)
+ return -EINVAL;
+
+ memmove(tim, next, skb_tail_pointer(skb) - next);
+ tim = skb_tail_pointer(skb) - (dtim_len + 2);
+
+ /* add the dummy at the end */
+ tim[0] = WLAN_EID_TIM;
+ tim[1] = 3;
+ tim[2] = 0;
+ tim[3] = dtim_period;
+ tim[4] = 0;
+
+ if (dtim_len > 3)
+ skb_trim(skb, skb->len - (dtim_len - 3));
+
+ return 0;
+}
+
+static int p54_beacon_update(struct p54_common *priv,
+ struct ieee80211_vif *vif)
+{
+ struct sk_buff *beacon;
+ int ret;
+
+ beacon = ieee80211_beacon_get(priv->hw, vif);
+ if (!beacon)
+ return -ENOMEM;
+ ret = p54_beacon_format_ie_tim(beacon);
+ if (ret)
+ return ret;
+
+ /*
+ * During operation, the firmware takes care of beaconing.
+ * The driver only needs to upload a new beacon template, once
+ * the template was changed by the stack or userspace.
+ *
+ * LMAC API 3.2.2 also specifies that the driver does not need
+ * to cancel the old beacon template by hand, instead the firmware
+ * will release the previous one through the feedback mechanism.
+ */
+ WARN_ON(p54_tx_80211(priv->hw, beacon));
+ priv->tsf_high32 = 0;
+ priv->tsf_low32 = 0;
+
+ return 0;
+}
+
+static int p54_start(struct ieee80211_hw *dev)
+{
+ struct p54_common *priv = dev->priv;
+ int err;
+
+ mutex_lock(&priv->conf_mutex);
+ err = priv->open(dev);
+ if (err)
+ goto out;
+ P54_SET_QUEUE(priv->qos_params[0], 0x0002, 0x0003, 0x0007, 47);
+ P54_SET_QUEUE(priv->qos_params[1], 0x0002, 0x0007, 0x000f, 94);
+ P54_SET_QUEUE(priv->qos_params[2], 0x0003, 0x000f, 0x03ff, 0);
+ P54_SET_QUEUE(priv->qos_params[3], 0x0007, 0x000f, 0x03ff, 0);
+ err = p54_set_edcf(priv);
+ if (err)
+ goto out;
+
+ memset(priv->bssid, ~0, ETH_ALEN);
+ priv->mode = NL80211_IFTYPE_MONITOR;
+ err = p54_setup_mac(priv);
+ if (err) {
+ priv->mode = NL80211_IFTYPE_UNSPECIFIED;
+ goto out;
+ }
+
+ ieee80211_queue_delayed_work(dev, &priv->work, 0);
+
+ priv->softled_state = 0;
+ err = p54_set_leds(priv);
+
+out:
+ mutex_unlock(&priv->conf_mutex);
+ return err;
+}
+
+static void p54_stop(struct ieee80211_hw *dev)
+{
+ struct p54_common *priv = dev->priv;
+ int i;
+
+ mutex_lock(&priv->conf_mutex);
+ priv->mode = NL80211_IFTYPE_UNSPECIFIED;
+ priv->softled_state = 0;
+ p54_set_leds(priv);
+
+ cancel_delayed_work_sync(&priv->work);
+
+ priv->stop(dev);
+ skb_queue_purge(&priv->tx_pending);
+ skb_queue_purge(&priv->tx_queue);
+ for (i = 0; i < P54_QUEUE_NUM; i++) {
+ priv->tx_stats[i].count = 0;
+ priv->tx_stats[i].len = 0;
+ }
+
+ priv->beacon_req_id = cpu_to_le32(0);
+ priv->tsf_high32 = priv->tsf_low32 = 0;
+ mutex_unlock(&priv->conf_mutex);
+}
+
+static int p54_add_interface(struct ieee80211_hw *dev,
+ struct ieee80211_if_init_conf *conf)
+{
+ struct p54_common *priv = dev->priv;
+
+ mutex_lock(&priv->conf_mutex);
+ if (priv->mode != NL80211_IFTYPE_MONITOR) {
+ mutex_unlock(&priv->conf_mutex);
+ return -EOPNOTSUPP;
+ }
+
+ priv->vif = conf->vif;
+
+ switch (conf->type) {
+ case NL80211_IFTYPE_STATION:
+ case NL80211_IFTYPE_ADHOC:
+ case NL80211_IFTYPE_AP:
+ case NL80211_IFTYPE_MESH_POINT:
+ priv->mode = conf->type;
+ break;
+ default:
+ mutex_unlock(&priv->conf_mutex);
+ return -EOPNOTSUPP;
+ }
+
+ memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
+ p54_setup_mac(priv);
+ mutex_unlock(&priv->conf_mutex);
+ return 0;
+}
+
+static void p54_remove_interface(struct ieee80211_hw *dev,
+ struct ieee80211_if_init_conf *conf)
+{
+ struct p54_common *priv = dev->priv;
+
+ mutex_lock(&priv->conf_mutex);
+ priv->vif = NULL;
+
+ /*
+ * LMAC API 3.2.2 states that any active beacon template must be
+ * canceled by the driver before attempting a mode transition.
+ */
+ if (le32_to_cpu(priv->beacon_req_id) != 0) {
+ p54_tx_cancel(priv, priv->beacon_req_id);
+ wait_for_completion_interruptible_timeout(&priv->beacon_comp, HZ);
+ }
+ priv->mode = NL80211_IFTYPE_MONITOR;
+ memset(priv->mac_addr, 0, ETH_ALEN);
+ memset(priv->bssid, 0, ETH_ALEN);
+ p54_setup_mac(priv);
+ mutex_unlock(&priv->conf_mutex);
+}
+
+static int p54_config(struct ieee80211_hw *dev, u32 changed)
+{
+ int ret = 0;
+ struct p54_common *priv = dev->priv;
+ struct ieee80211_conf *conf = &dev->conf;
+
+ mutex_lock(&priv->conf_mutex);
+ if (changed & IEEE80211_CONF_CHANGE_POWER)
+ priv->output_power = conf->power_level << 2;
+ if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
+ ret = p54_scan(priv, P54_SCAN_EXIT, 0);
+ if (ret)
+ goto out;
+ }
+ if (changed & IEEE80211_CONF_CHANGE_PS) {
+ ret = p54_set_ps(priv);
+ if (ret)
+ goto out;
+ }
+ if (changed & IEEE80211_CONF_CHANGE_IDLE) {
+ ret = p54_setup_mac(priv);
+ if (ret)
+ goto out;
+ }
+
+out:
+ mutex_unlock(&priv->conf_mutex);
+ return ret;
+}
+
+static void p54_configure_filter(struct ieee80211_hw *dev,
+ unsigned int changed_flags,
+ unsigned int *total_flags,
+ u64 multicast)
+{
+ struct p54_common *priv = dev->priv;
+
+ *total_flags &= FIF_PROMISC_IN_BSS |
+ FIF_OTHER_BSS;
+
+ priv->filter_flags = *total_flags;
+
+ if (changed_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS))
+ p54_setup_mac(priv);
+}
+
+static int p54_conf_tx(struct ieee80211_hw *dev, u16 queue,
+ const struct ieee80211_tx_queue_params *params)
+{
+ struct p54_common *priv = dev->priv;
+ int ret;
+
+ mutex_lock(&priv->conf_mutex);
+ if (queue < dev->queues) {
+ P54_SET_QUEUE(priv->qos_params[queue], params->aifs,
+ params->cw_min, params->cw_max, params->txop);
+ ret = p54_set_edcf(priv);
+ } else
+ ret = -EINVAL;
+ mutex_unlock(&priv->conf_mutex);
+ return ret;
+}
+
+static void p54_work(struct work_struct *work)
+{
+ struct p54_common *priv = container_of(work, struct p54_common,
+ work.work);
+
+ if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
+ return ;
+
+ /*
+ * TODO: walk through tx_queue and do the following tasks
+ * 1. initiate bursts.
+ * 2. cancel stuck frames / reset the device if necessary.
+ */
+
+ p54_fetch_statistics(priv);
+}
+
+static int p54_get_stats(struct ieee80211_hw *dev,
+ struct ieee80211_low_level_stats *stats)
+{
+ struct p54_common *priv = dev->priv;
+
+ memcpy(stats, &priv->stats, sizeof(*stats));
+ return 0;
+}
+
+static int p54_get_tx_stats(struct ieee80211_hw *dev,
+ struct ieee80211_tx_queue_stats *stats)
+{
+ struct p54_common *priv = dev->priv;
+
+ memcpy(stats, &priv->tx_stats[P54_QUEUE_DATA],
+ sizeof(stats[0]) * dev->queues);
+ return 0;
+}
+
+static void p54_bss_info_changed(struct ieee80211_hw *dev,
+ struct ieee80211_vif *vif,
+ struct ieee80211_bss_conf *info,
+ u32 changed)
+{
+ struct p54_common *priv = dev->priv;
+
+ mutex_lock(&priv->conf_mutex);
+ if (changed & BSS_CHANGED_BSSID) {
+ memcpy(priv->bssid, info->bssid, ETH_ALEN);
+ p54_setup_mac(priv);
+ }
+
+ if (changed & BSS_CHANGED_BEACON) {
+ p54_scan(priv, P54_SCAN_EXIT, 0);
+ p54_setup_mac(priv);
+ p54_beacon_update(priv, vif);
+ p54_set_edcf(priv);
+ }
+
+ if (changed & (BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BEACON)) {
+ priv->use_short_slot = info->use_short_slot;
+ p54_set_edcf(priv);
+ }
+ if (changed & BSS_CHANGED_BASIC_RATES) {
+ if (dev->conf.channel->band == IEEE80211_BAND_5GHZ)
+ priv->basic_rate_mask = (info->basic_rates << 4);
+ else
+ priv->basic_rate_mask = info->basic_rates;
+ p54_setup_mac(priv);
+ if (priv->fw_var >= 0x500)
+ p54_scan(priv, P54_SCAN_EXIT, 0);
+ }
+ if (changed & BSS_CHANGED_ASSOC) {
+ if (info->assoc) {
+ priv->aid = info->aid;
+ priv->wakeup_timer = info->beacon_int *
+ info->dtim_period * 5;
+ p54_setup_mac(priv);
+ } else {
+ priv->wakeup_timer = 500;
+ priv->aid = 0;
+ }
+ }
+
+ mutex_unlock(&priv->conf_mutex);
+}
+
+static int p54_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
+ struct ieee80211_vif *vif, struct ieee80211_sta *sta,
+ struct ieee80211_key_conf *key)
+{
+ struct p54_common *priv = dev->priv;
+ int slot, ret = 0;
+ u8 algo = 0;
+ u8 *addr = NULL;
+
+ if (modparam_nohwcrypt)
+ return -EOPNOTSUPP;
+
+ mutex_lock(&priv->conf_mutex);
+ if (cmd == SET_KEY) {
+ switch (key->alg) {
+ case ALG_TKIP:
+ if (!(priv->privacy_caps & (BR_DESC_PRIV_CAP_MICHAEL |
+ BR_DESC_PRIV_CAP_TKIP))) {
+ ret = -EOPNOTSUPP;
+ goto out_unlock;
+ }
+ key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
+ algo = P54_CRYPTO_TKIPMICHAEL;
+ break;
+ case ALG_WEP:
+ if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_WEP)) {
+ ret = -EOPNOTSUPP;
+ goto out_unlock;
+ }
+ key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
+ algo = P54_CRYPTO_WEP;
+ break;
+ case ALG_CCMP:
+ if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP)) {
+ ret = -EOPNOTSUPP;
+ goto out_unlock;
+ }
+ key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
+ algo = P54_CRYPTO_AESCCMP;
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ goto out_unlock;
+ }
+ slot = bitmap_find_free_region(priv->used_rxkeys,
+ priv->rx_keycache_size, 0);
+
+ if (slot < 0) {
+ /*
+ * The device supports the choosen algorithm, but the
+ * firmware does not provide enough key slots to store
+ * all of them.
+ * But encryption offload for outgoing frames is always
+ * possible, so we just pretend that the upload was
+ * successful and do the decryption in software.
+ */
+
+ /* mark the key as invalid. */
+ key->hw_key_idx = 0xff;
+ goto out_unlock;
+ }
+ } else {
+ slot = key->hw_key_idx;
+
+ if (slot == 0xff) {
+ /* This key was not uploaded into the rx key cache. */
+
+ goto out_unlock;
+ }
+
+ bitmap_release_region(priv->used_rxkeys, slot, 0);
+ algo = 0;
+ }
+
+ if (sta)
+ addr = sta->addr;
+
+ ret = p54_upload_key(priv, algo, slot, key->keyidx,
+ key->keylen, addr, key->key);
+ if (ret) {
+ bitmap_release_region(priv->used_rxkeys, slot, 0);
+ ret = -EOPNOTSUPP;
+ goto out_unlock;
+ }
+
+ key->hw_key_idx = slot;
+
+out_unlock:
+ mutex_unlock(&priv->conf_mutex);
+ return ret;
+}
+
+static const struct ieee80211_ops p54_ops = {
+ .tx = p54_tx_80211,
+ .start = p54_start,
+ .stop = p54_stop,
+ .add_interface = p54_add_interface,
+ .remove_interface = p54_remove_interface,
+ .set_tim = p54_set_tim,
+ .sta_notify = p54_sta_notify,
+ .set_key = p54_set_key,
+ .config = p54_config,
+ .bss_info_changed = p54_bss_info_changed,
+ .configure_filter = p54_configure_filter,
+ .conf_tx = p54_conf_tx,
+ .get_stats = p54_get_stats,
+ .get_tx_stats = p54_get_tx_stats
+};
+
+struct ieee80211_hw *p54_init_common(size_t priv_data_len)
+{
+ struct ieee80211_hw *dev;
+ struct p54_common *priv;
+
+ dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
+ if (!dev)
+ return NULL;
+
+ priv = dev->priv;
+ priv->hw = dev;
+ priv->mode = NL80211_IFTYPE_UNSPECIFIED;
+ priv->basic_rate_mask = 0x15f;
+ spin_lock_init(&priv->tx_stats_lock);
+ skb_queue_head_init(&priv->tx_queue);
+ skb_queue_head_init(&priv->tx_pending);
+ dev->flags = IEEE80211_HW_RX_INCLUDES_FCS |
+ IEEE80211_HW_SIGNAL_DBM |
+ IEEE80211_HW_SUPPORTS_PS |
+ IEEE80211_HW_PS_NULLFUNC_STACK |
+ IEEE80211_HW_BEACON_FILTER |
+ IEEE80211_HW_NOISE_DBM;
+
+ dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
+ BIT(NL80211_IFTYPE_ADHOC) |
+ BIT(NL80211_IFTYPE_AP) |
+ BIT(NL80211_IFTYPE_MESH_POINT);
+
+ dev->channel_change_time = 1000; /* TODO: find actual value */
+ priv->beacon_req_id = cpu_to_le32(0);
+ priv->tx_stats[P54_QUEUE_BEACON].limit = 1;
+ priv->tx_stats[P54_QUEUE_FWSCAN].limit = 1;
+ priv->tx_stats[P54_QUEUE_MGMT].limit = 3;
+ priv->tx_stats[P54_QUEUE_CAB].limit = 3;
+ priv->tx_stats[P54_QUEUE_DATA].limit = 5;
+ dev->queues = 1;
+ priv->noise = -94;
+ /*
+ * We support at most 8 tries no matter which rate they're at,
+ * we cannot support max_rates * max_rate_tries as we set it
+ * here, but setting it correctly to 4/2 or so would limit us
+ * artificially if the RC algorithm wants just two rates, so
+ * let's say 4/7, we'll redistribute it at TX time, see the
+ * comments there.
+ */
+ dev->max_rates = 4;
+ dev->max_rate_tries = 7;
+ dev->extra_tx_headroom = sizeof(struct p54_hdr) + 4 +
+ sizeof(struct p54_tx_data);
+
+ /*
+ * For now, disable PS by default because it affects
+ * link stability significantly.
+ */
+ dev->wiphy->ps_default = false;
+
+ mutex_init(&priv->conf_mutex);
+ mutex_init(&priv->eeprom_mutex);
+ init_completion(&priv->eeprom_comp);
+ init_completion(&priv->beacon_comp);
+ INIT_DELAYED_WORK(&priv->work, p54_work);
+
+ return dev;
+}
+EXPORT_SYMBOL_GPL(p54_init_common);
+
+int p54_register_common(struct ieee80211_hw *dev, struct device *pdev)
+{
+ struct p54_common *priv = dev->priv;
+ int err;
+
+ err = ieee80211_register_hw(dev);
+ if (err) {
+ dev_err(pdev, "Cannot register device (%d).\n", err);
+ return err;
+ }
+
+#ifdef CONFIG_P54_LEDS
+ err = p54_init_leds(priv);
+ if (err)
+ return err;
+#endif /* CONFIG_P54_LEDS */
+
+ dev_info(pdev, "is registered as '%s'\n", wiphy_name(dev->wiphy));
+ return 0;
+}
+EXPORT_SYMBOL_GPL(p54_register_common);
+
+void p54_free_common(struct ieee80211_hw *dev)
+{
+ struct p54_common *priv = dev->priv;
+ unsigned int i;
+
+ for (i = 0; i < IEEE80211_NUM_BANDS; i++)
+ kfree(priv->band_table[i]);
+
+ kfree(priv->iq_autocal);
+ kfree(priv->output_limit);
+ kfree(priv->curve_data);
+ kfree(priv->used_rxkeys);
+ priv->iq_autocal = NULL;
+ priv->output_limit = NULL;
+ priv->curve_data = NULL;
+ priv->used_rxkeys = NULL;
+ ieee80211_free_hw(dev);
+}
+EXPORT_SYMBOL_GPL(p54_free_common);
+
+void p54_unregister_common(struct ieee80211_hw *dev)
+{
+ struct p54_common *priv = dev->priv;
+
+#ifdef CONFIG_P54_LEDS
+ p54_unregister_leds(priv);
+#endif /* CONFIG_P54_LEDS */
+
+ ieee80211_unregister_hw(dev);
+ mutex_destroy(&priv->conf_mutex);
+ mutex_destroy(&priv->eeprom_mutex);
+}
+EXPORT_SYMBOL_GPL(p54_unregister_common);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 16:23:46 +0100