diff options
Diffstat (limited to 'drivers/net/wireless/zd1211rw/zd_mac.c')
-rw-r--r-- | drivers/net/wireless/zd1211rw/zd_mac.c | 1550 |
1 files changed, 0 insertions, 1550 deletions
diff --git a/drivers/net/wireless/zd1211rw/zd_mac.c b/drivers/net/wireless/zd1211rw/zd_mac.c deleted file mode 100644 index e539d9b1b..000000000 --- a/drivers/net/wireless/zd1211rw/zd_mac.c +++ /dev/null @@ -1,1550 +0,0 @@ -/* ZD1211 USB-WLAN driver for Linux - * - * Copyright (C) 2005-2007 Ulrich Kunitz <kune@deine-taler.de> - * Copyright (C) 2006-2007 Daniel Drake <dsd@gentoo.org> - * Copyright (C) 2006-2007 Michael Wu <flamingice@sourmilk.net> - * Copyright (C) 2007-2008 Luis R. Rodriguez <mcgrof@winlab.rutgers.edu> - * - * 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; if not, see <http://www.gnu.org/licenses/>. - */ - -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/slab.h> -#include <linux/usb.h> -#include <linux/jiffies.h> -#include <net/ieee80211_radiotap.h> - -#include "zd_def.h" -#include "zd_chip.h" -#include "zd_mac.h" -#include "zd_rf.h" - -struct zd_reg_alpha2_map { - u32 reg; - char alpha2[2]; -}; - -static struct zd_reg_alpha2_map reg_alpha2_map[] = { - { ZD_REGDOMAIN_FCC, "US" }, - { ZD_REGDOMAIN_IC, "CA" }, - { ZD_REGDOMAIN_ETSI, "DE" }, /* Generic ETSI, use most restrictive */ - { ZD_REGDOMAIN_JAPAN, "JP" }, - { ZD_REGDOMAIN_JAPAN_2, "JP" }, - { ZD_REGDOMAIN_JAPAN_3, "JP" }, - { ZD_REGDOMAIN_SPAIN, "ES" }, - { ZD_REGDOMAIN_FRANCE, "FR" }, -}; - -/* This table contains the hardware specific values for the modulation rates. */ -static const struct ieee80211_rate zd_rates[] = { - { .bitrate = 10, - .hw_value = ZD_CCK_RATE_1M, }, - { .bitrate = 20, - .hw_value = ZD_CCK_RATE_2M, - .hw_value_short = ZD_CCK_RATE_2M | ZD_CCK_PREA_SHORT, - .flags = IEEE80211_RATE_SHORT_PREAMBLE }, - { .bitrate = 55, - .hw_value = ZD_CCK_RATE_5_5M, - .hw_value_short = ZD_CCK_RATE_5_5M | ZD_CCK_PREA_SHORT, - .flags = IEEE80211_RATE_SHORT_PREAMBLE }, - { .bitrate = 110, - .hw_value = ZD_CCK_RATE_11M, - .hw_value_short = ZD_CCK_RATE_11M | ZD_CCK_PREA_SHORT, - .flags = IEEE80211_RATE_SHORT_PREAMBLE }, - { .bitrate = 60, - .hw_value = ZD_OFDM_RATE_6M, - .flags = 0 }, - { .bitrate = 90, - .hw_value = ZD_OFDM_RATE_9M, - .flags = 0 }, - { .bitrate = 120, - .hw_value = ZD_OFDM_RATE_12M, - .flags = 0 }, - { .bitrate = 180, - .hw_value = ZD_OFDM_RATE_18M, - .flags = 0 }, - { .bitrate = 240, - .hw_value = ZD_OFDM_RATE_24M, - .flags = 0 }, - { .bitrate = 360, - .hw_value = ZD_OFDM_RATE_36M, - .flags = 0 }, - { .bitrate = 480, - .hw_value = ZD_OFDM_RATE_48M, - .flags = 0 }, - { .bitrate = 540, - .hw_value = ZD_OFDM_RATE_54M, - .flags = 0 }, -}; - -/* - * Zydas retry rates table. Each line is listed in the same order as - * in zd_rates[] and contains all the rate used when a packet is sent - * starting with a given rates. Let's consider an example : - * - * "11 Mbits : 4, 3, 2, 1, 0" means : - * - packet is sent using 4 different rates - * - 1st rate is index 3 (ie 11 Mbits) - * - 2nd rate is index 2 (ie 5.5 Mbits) - * - 3rd rate is index 1 (ie 2 Mbits) - * - 4th rate is index 0 (ie 1 Mbits) - */ - -static const struct tx_retry_rate zd_retry_rates[] = { - { /* 1 Mbits */ 1, { 0 }}, - { /* 2 Mbits */ 2, { 1, 0 }}, - { /* 5.5 Mbits */ 3, { 2, 1, 0 }}, - { /* 11 Mbits */ 4, { 3, 2, 1, 0 }}, - { /* 6 Mbits */ 5, { 4, 3, 2, 1, 0 }}, - { /* 9 Mbits */ 6, { 5, 4, 3, 2, 1, 0}}, - { /* 12 Mbits */ 5, { 6, 3, 2, 1, 0 }}, - { /* 18 Mbits */ 6, { 7, 6, 3, 2, 1, 0 }}, - { /* 24 Mbits */ 6, { 8, 6, 3, 2, 1, 0 }}, - { /* 36 Mbits */ 7, { 9, 8, 6, 3, 2, 1, 0 }}, - { /* 48 Mbits */ 8, {10, 9, 8, 6, 3, 2, 1, 0 }}, - { /* 54 Mbits */ 9, {11, 10, 9, 8, 6, 3, 2, 1, 0 }} -}; - -static const struct ieee80211_channel zd_channels[] = { - { .center_freq = 2412, .hw_value = 1 }, - { .center_freq = 2417, .hw_value = 2 }, - { .center_freq = 2422, .hw_value = 3 }, - { .center_freq = 2427, .hw_value = 4 }, - { .center_freq = 2432, .hw_value = 5 }, - { .center_freq = 2437, .hw_value = 6 }, - { .center_freq = 2442, .hw_value = 7 }, - { .center_freq = 2447, .hw_value = 8 }, - { .center_freq = 2452, .hw_value = 9 }, - { .center_freq = 2457, .hw_value = 10 }, - { .center_freq = 2462, .hw_value = 11 }, - { .center_freq = 2467, .hw_value = 12 }, - { .center_freq = 2472, .hw_value = 13 }, - { .center_freq = 2484, .hw_value = 14 }, -}; - -static void housekeeping_init(struct zd_mac *mac); -static void housekeeping_enable(struct zd_mac *mac); -static void housekeeping_disable(struct zd_mac *mac); -static void beacon_init(struct zd_mac *mac); -static void beacon_enable(struct zd_mac *mac); -static void beacon_disable(struct zd_mac *mac); -static void set_rts_cts(struct zd_mac *mac, unsigned int short_preamble); -static int zd_mac_config_beacon(struct ieee80211_hw *hw, - struct sk_buff *beacon, bool in_intr); - -static int zd_reg2alpha2(u8 regdomain, char *alpha2) -{ - unsigned int i; - struct zd_reg_alpha2_map *reg_map; - for (i = 0; i < ARRAY_SIZE(reg_alpha2_map); i++) { - reg_map = ®_alpha2_map[i]; - if (regdomain == reg_map->reg) { - alpha2[0] = reg_map->alpha2[0]; - alpha2[1] = reg_map->alpha2[1]; - return 0; - } - } - return 1; -} - -static int zd_check_signal(struct ieee80211_hw *hw, int signal) -{ - struct zd_mac *mac = zd_hw_mac(hw); - - dev_dbg_f_cond(zd_mac_dev(mac), signal < 0 || signal > 100, - "%s: signal value from device not in range 0..100, " - "but %d.\n", __func__, signal); - - if (signal < 0) - signal = 0; - else if (signal > 100) - signal = 100; - - return signal; -} - -int zd_mac_preinit_hw(struct ieee80211_hw *hw) -{ - int r; - u8 addr[ETH_ALEN]; - struct zd_mac *mac = zd_hw_mac(hw); - - r = zd_chip_read_mac_addr_fw(&mac->chip, addr); - if (r) - return r; - - SET_IEEE80211_PERM_ADDR(hw, addr); - - return 0; -} - -int zd_mac_init_hw(struct ieee80211_hw *hw) -{ - int r; - struct zd_mac *mac = zd_hw_mac(hw); - struct zd_chip *chip = &mac->chip; - char alpha2[2]; - u8 default_regdomain; - - r = zd_chip_enable_int(chip); - if (r) - goto out; - r = zd_chip_init_hw(chip); - if (r) - goto disable_int; - - ZD_ASSERT(!irqs_disabled()); - - r = zd_read_regdomain(chip, &default_regdomain); - if (r) - goto disable_int; - spin_lock_irq(&mac->lock); - mac->regdomain = mac->default_regdomain = default_regdomain; - spin_unlock_irq(&mac->lock); - - /* We must inform the device that we are doing encryption/decryption in - * software at the moment. */ - r = zd_set_encryption_type(chip, ENC_SNIFFER); - if (r) - goto disable_int; - - r = zd_reg2alpha2(mac->regdomain, alpha2); - if (r) - goto disable_int; - - r = regulatory_hint(hw->wiphy, alpha2); -disable_int: - zd_chip_disable_int(chip); -out: - return r; -} - -void zd_mac_clear(struct zd_mac *mac) -{ - flush_workqueue(zd_workqueue); - zd_chip_clear(&mac->chip); - ZD_ASSERT(!spin_is_locked(&mac->lock)); - ZD_MEMCLEAR(mac, sizeof(struct zd_mac)); -} - -static int set_rx_filter(struct zd_mac *mac) -{ - unsigned long flags; - u32 filter = STA_RX_FILTER; - - spin_lock_irqsave(&mac->lock, flags); - if (mac->pass_ctrl) - filter |= RX_FILTER_CTRL; - spin_unlock_irqrestore(&mac->lock, flags); - - return zd_iowrite32(&mac->chip, CR_RX_FILTER, filter); -} - -static int set_mac_and_bssid(struct zd_mac *mac) -{ - int r; - - if (!mac->vif) - return -1; - - r = zd_write_mac_addr(&mac->chip, mac->vif->addr); - if (r) - return r; - - /* Vendor driver after setting MAC either sets BSSID for AP or - * filter for other modes. - */ - if (mac->type != NL80211_IFTYPE_AP) - return set_rx_filter(mac); - else - return zd_write_bssid(&mac->chip, mac->vif->addr); -} - -static int set_mc_hash(struct zd_mac *mac) -{ - struct zd_mc_hash hash; - zd_mc_clear(&hash); - return zd_chip_set_multicast_hash(&mac->chip, &hash); -} - -int zd_op_start(struct ieee80211_hw *hw) -{ - struct zd_mac *mac = zd_hw_mac(hw); - struct zd_chip *chip = &mac->chip; - struct zd_usb *usb = &chip->usb; - int r; - - if (!usb->initialized) { - r = zd_usb_init_hw(usb); - if (r) - goto out; - } - - r = zd_chip_enable_int(chip); - if (r < 0) - goto out; - - r = zd_chip_set_basic_rates(chip, CR_RATES_80211B | CR_RATES_80211G); - if (r < 0) - goto disable_int; - r = set_rx_filter(mac); - if (r) - goto disable_int; - r = set_mc_hash(mac); - if (r) - goto disable_int; - - /* Wait after setting the multicast hash table and powering on - * the radio otherwise interface bring up will fail. This matches - * what the vendor driver did. - */ - msleep(10); - - r = zd_chip_switch_radio_on(chip); - if (r < 0) { - dev_err(zd_chip_dev(chip), - "%s: failed to set radio on\n", __func__); - goto disable_int; - } - r = zd_chip_enable_rxtx(chip); - if (r < 0) - goto disable_radio; - r = zd_chip_enable_hwint(chip); - if (r < 0) - goto disable_rxtx; - - housekeeping_enable(mac); - beacon_enable(mac); - set_bit(ZD_DEVICE_RUNNING, &mac->flags); - return 0; -disable_rxtx: - zd_chip_disable_rxtx(chip); -disable_radio: - zd_chip_switch_radio_off(chip); -disable_int: - zd_chip_disable_int(chip); -out: - return r; -} - -void zd_op_stop(struct ieee80211_hw *hw) -{ - struct zd_mac *mac = zd_hw_mac(hw); - struct zd_chip *chip = &mac->chip; - struct sk_buff *skb; - struct sk_buff_head *ack_wait_queue = &mac->ack_wait_queue; - - clear_bit(ZD_DEVICE_RUNNING, &mac->flags); - - /* The order here deliberately is a little different from the open() - * method, since we need to make sure there is no opportunity for RX - * frames to be processed by mac80211 after we have stopped it. - */ - - zd_chip_disable_rxtx(chip); - beacon_disable(mac); - housekeeping_disable(mac); - flush_workqueue(zd_workqueue); - - zd_chip_disable_hwint(chip); - zd_chip_switch_radio_off(chip); - zd_chip_disable_int(chip); - - - while ((skb = skb_dequeue(ack_wait_queue))) - dev_kfree_skb_any(skb); -} - -int zd_restore_settings(struct zd_mac *mac) -{ - struct sk_buff *beacon; - struct zd_mc_hash multicast_hash; - unsigned int short_preamble; - int r, beacon_interval, beacon_period; - u8 channel; - - dev_dbg_f(zd_mac_dev(mac), "\n"); - - spin_lock_irq(&mac->lock); - multicast_hash = mac->multicast_hash; - short_preamble = mac->short_preamble; - beacon_interval = mac->beacon.interval; - beacon_period = mac->beacon.period; - channel = mac->channel; - spin_unlock_irq(&mac->lock); - - r = set_mac_and_bssid(mac); - if (r < 0) { - dev_dbg_f(zd_mac_dev(mac), "set_mac_and_bssid failed, %d\n", r); - return r; - } - - r = zd_chip_set_channel(&mac->chip, channel); - if (r < 0) { - dev_dbg_f(zd_mac_dev(mac), "zd_chip_set_channel failed, %d\n", - r); - return r; - } - - set_rts_cts(mac, short_preamble); - - r = zd_chip_set_multicast_hash(&mac->chip, &multicast_hash); - if (r < 0) { - dev_dbg_f(zd_mac_dev(mac), - "zd_chip_set_multicast_hash failed, %d\n", r); - return r; - } - - if (mac->type == NL80211_IFTYPE_MESH_POINT || - mac->type == NL80211_IFTYPE_ADHOC || - mac->type == NL80211_IFTYPE_AP) { - if (mac->vif != NULL) { - beacon = ieee80211_beacon_get(mac->hw, mac->vif); - if (beacon) - zd_mac_config_beacon(mac->hw, beacon, false); - } - - zd_set_beacon_interval(&mac->chip, beacon_interval, - beacon_period, mac->type); - - spin_lock_irq(&mac->lock); - mac->beacon.last_update = jiffies; - spin_unlock_irq(&mac->lock); - } - - return 0; -} - -/** - * zd_mac_tx_status - reports tx status of a packet if required - * @hw - a &struct ieee80211_hw pointer - * @skb - a sk-buffer - * @flags: extra flags to set in the TX status info - * @ackssi: ACK signal strength - * @success - True for successful transmission of the frame - * - * This information calls ieee80211_tx_status_irqsafe() if required by the - * control information. It copies the control information into the status - * information. - * - * If no status information has been requested, the skb is freed. - */ -static void zd_mac_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb, - int ackssi, struct tx_status *tx_status) -{ - struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); - int i; - int success = 1, retry = 1; - int first_idx; - const struct tx_retry_rate *retries; - - ieee80211_tx_info_clear_status(info); - - if (tx_status) { - success = !tx_status->failure; - retry = tx_status->retry + success; - } - - if (success) { - /* success */ - info->flags |= IEEE80211_TX_STAT_ACK; - } else { - /* failure */ - info->flags &= ~IEEE80211_TX_STAT_ACK; - } - - first_idx = info->status.rates[0].idx; - ZD_ASSERT(0<=first_idx && first_idx<ARRAY_SIZE(zd_retry_rates)); - retries = &zd_retry_rates[first_idx]; - ZD_ASSERT(1 <= retry && retry <= retries->count); - - info->status.rates[0].idx = retries->rate[0]; - info->status.rates[0].count = 1; // (retry > 1 ? 2 : 1); - - for (i=1; i<IEEE80211_TX_MAX_RATES-1 && i<retry; i++) { - info->status.rates[i].idx = retries->rate[i]; - info->status.rates[i].count = 1; // ((i==retry-1) && success ? 1:2); - } - for (; i<IEEE80211_TX_MAX_RATES && i<retry; i++) { - info->status.rates[i].idx = retries->rate[retry - 1]; - info->status.rates[i].count = 1; // (success ? 1:2); - } - if (i<IEEE80211_TX_MAX_RATES) - info->status.rates[i].idx = -1; /* terminate */ - - info->status.ack_signal = zd_check_signal(hw, ackssi); - ieee80211_tx_status_irqsafe(hw, skb); -} - -/** - * zd_mac_tx_failed - callback for failed frames - * @dev: the mac80211 wireless device - * - * This function is called if a frame couldn't be successfully - * transferred. The first frame from the tx queue, will be selected and - * reported as error to the upper layers. - */ -void zd_mac_tx_failed(struct urb *urb) -{ - struct ieee80211_hw * hw = zd_usb_to_hw(urb->context); - struct zd_mac *mac = zd_hw_mac(hw); - struct sk_buff_head *q = &mac->ack_wait_queue; - struct sk_buff *skb; - struct tx_status *tx_status = (struct tx_status *)urb->transfer_buffer; - unsigned long flags; - int success = !tx_status->failure; - int retry = tx_status->retry + success; - int found = 0; - int i, position = 0; - - q = &mac->ack_wait_queue; - spin_lock_irqsave(&q->lock, flags); - - skb_queue_walk(q, skb) { - struct ieee80211_hdr *tx_hdr; - struct ieee80211_tx_info *info; - int first_idx, final_idx; - const struct tx_retry_rate *retries; - u8 final_rate; - - position ++; - - /* if the hardware reports a failure and we had a 802.11 ACK - * pending, then we skip the first skb when searching for a - * matching frame */ - if (tx_status->failure && mac->ack_pending && - skb_queue_is_first(q, skb)) { - continue; - } - - tx_hdr = (struct ieee80211_hdr *)skb->data; - - /* we skip all frames not matching the reported destination */ - if (unlikely(!ether_addr_equal(tx_hdr->addr1, tx_status->mac))) - continue; - - /* we skip all frames not matching the reported final rate */ - - info = IEEE80211_SKB_CB(skb); - first_idx = info->status.rates[0].idx; - ZD_ASSERT(0<=first_idx && first_idx<ARRAY_SIZE(zd_retry_rates)); - retries = &zd_retry_rates[first_idx]; - if (retry <= 0 || retry > retries->count) - continue; - - final_idx = retries->rate[retry - 1]; - final_rate = zd_rates[final_idx].hw_value; - - if (final_rate != tx_status->rate) { - continue; - } - - found = 1; - break; - } - - if (found) { - for (i=1; i<=position; i++) { - skb = __skb_dequeue(q); - zd_mac_tx_status(hw, skb, - mac->ack_pending ? mac->ack_signal : 0, - i == position ? tx_status : NULL); - mac->ack_pending = 0; - } - } - - spin_unlock_irqrestore(&q->lock, flags); -} - -/** - * zd_mac_tx_to_dev - callback for USB layer - * @skb: a &sk_buff pointer - * @error: error value, 0 if transmission successful - * - * Informs the MAC layer that the frame has successfully transferred to the - * device. If an ACK is required and the transfer to the device has been - * successful, the packets are put on the @ack_wait_queue with - * the control set removed. - */ -void zd_mac_tx_to_dev(struct sk_buff *skb, int error) -{ - struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); - struct ieee80211_hw *hw = info->rate_driver_data[0]; - struct zd_mac *mac = zd_hw_mac(hw); - - ieee80211_tx_info_clear_status(info); - - skb_pull(skb, sizeof(struct zd_ctrlset)); - if (unlikely(error || - (info->flags & IEEE80211_TX_CTL_NO_ACK))) { - /* - * FIXME : do we need to fill in anything ? - */ - ieee80211_tx_status_irqsafe(hw, skb); - } else { - struct sk_buff_head *q = &mac->ack_wait_queue; - - skb_queue_tail(q, skb); - while (skb_queue_len(q) > ZD_MAC_MAX_ACK_WAITERS) { - zd_mac_tx_status(hw, skb_dequeue(q), - mac->ack_pending ? mac->ack_signal : 0, - NULL); - mac->ack_pending = 0; - } - } -} - -static int zd_calc_tx_length_us(u8 *service, u8 zd_rate, u16 tx_length) -{ - /* ZD_PURE_RATE() must be used to remove the modulation type flag of - * the zd-rate values. - */ - static const u8 rate_divisor[] = { - [ZD_PURE_RATE(ZD_CCK_RATE_1M)] = 1, - [ZD_PURE_RATE(ZD_CCK_RATE_2M)] = 2, - /* Bits must be doubled. */ - [ZD_PURE_RATE(ZD_CCK_RATE_5_5M)] = 11, - [ZD_PURE_RATE(ZD_CCK_RATE_11M)] = 11, - [ZD_PURE_RATE(ZD_OFDM_RATE_6M)] = 6, - [ZD_PURE_RATE(ZD_OFDM_RATE_9M)] = 9, - [ZD_PURE_RATE(ZD_OFDM_RATE_12M)] = 12, - [ZD_PURE_RATE(ZD_OFDM_RATE_18M)] = 18, - [ZD_PURE_RATE(ZD_OFDM_RATE_24M)] = 24, - [ZD_PURE_RATE(ZD_OFDM_RATE_36M)] = 36, - [ZD_PURE_RATE(ZD_OFDM_RATE_48M)] = 48, - [ZD_PURE_RATE(ZD_OFDM_RATE_54M)] = 54, - }; - - u32 bits = (u32)tx_length * 8; - u32 divisor; - - divisor = rate_divisor[ZD_PURE_RATE(zd_rate)]; - if (divisor == 0) - return -EINVAL; - - switch (zd_rate) { - case ZD_CCK_RATE_5_5M: - bits = (2*bits) + 10; /* round up to the next integer */ - break; - case ZD_CCK_RATE_11M: - if (service) { - u32 t = bits % 11; - *service &= ~ZD_PLCP_SERVICE_LENGTH_EXTENSION; - if (0 < t && t <= 3) { - *service |= ZD_PLCP_SERVICE_LENGTH_EXTENSION; - } - } - bits += 10; /* round up to the next integer */ - break; - } - - return bits/divisor; -} - -static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs, - struct ieee80211_hdr *header, - struct ieee80211_tx_info *info) -{ - /* - * CONTROL TODO: - * - if backoff needed, enable bit 0 - * - if burst (backoff not needed) disable bit 0 - */ - - cs->control = 0; - - /* First fragment */ - if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) - cs->control |= ZD_CS_NEED_RANDOM_BACKOFF; - - /* No ACK expected (multicast, etc.) */ - if (info->flags & IEEE80211_TX_CTL_NO_ACK) - cs->control |= ZD_CS_NO_ACK; - - /* PS-POLL */ - if (ieee80211_is_pspoll(header->frame_control)) - cs->control |= ZD_CS_PS_POLL_FRAME; - - if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) - cs->control |= ZD_CS_RTS; - - if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) - cs->control |= ZD_CS_SELF_CTS; - - /* FIXME: Management frame? */ -} - -static bool zd_mac_match_cur_beacon(struct zd_mac *mac, struct sk_buff *beacon) -{ - if (!mac->beacon.cur_beacon) - return false; - - if (mac->beacon.cur_beacon->len != beacon->len) - return false; - - return !memcmp(beacon->data, mac->beacon.cur_beacon->data, beacon->len); -} - -static void zd_mac_free_cur_beacon_locked(struct zd_mac *mac) -{ - ZD_ASSERT(mutex_is_locked(&mac->chip.mutex)); - - kfree_skb(mac->beacon.cur_beacon); - mac->beacon.cur_beacon = NULL; -} - -static void zd_mac_free_cur_beacon(struct zd_mac *mac) -{ - mutex_lock(&mac->chip.mutex); - zd_mac_free_cur_beacon_locked(mac); - mutex_unlock(&mac->chip.mutex); -} - -static int zd_mac_config_beacon(struct ieee80211_hw *hw, struct sk_buff *beacon, - bool in_intr) -{ - struct zd_mac *mac = zd_hw_mac(hw); - int r, ret, num_cmds, req_pos = 0; - u32 tmp, j = 0; - /* 4 more bytes for tail CRC */ - u32 full_len = beacon->len + 4; - unsigned long end_jiffies, message_jiffies; - struct zd_ioreq32 *ioreqs; - - mutex_lock(&mac->chip.mutex); - - /* Check if hw already has this beacon. */ - if (zd_mac_match_cur_beacon(mac, beacon)) { - r = 0; - goto out_nofree; - } - - /* Alloc memory for full beacon write at once. */ - num_cmds = 1 + zd_chip_is_zd1211b(&mac->chip) + full_len; - ioreqs = kmalloc(num_cmds * sizeof(struct zd_ioreq32), GFP_KERNEL); - if (!ioreqs) { - r = -ENOMEM; - goto out_nofree; - } - - r = zd_iowrite32_locked(&mac->chip, 0, CR_BCN_FIFO_SEMAPHORE); - if (r < 0) - goto out; - r = zd_ioread32_locked(&mac->chip, &tmp, CR_BCN_FIFO_SEMAPHORE); - if (r < 0) - goto release_sema; - if (in_intr && tmp & 0x2) { - r = -EBUSY; - goto release_sema; - } - - end_jiffies = jiffies + HZ / 2; /*~500ms*/ - message_jiffies = jiffies + HZ / 10; /*~100ms*/ - while (tmp & 0x2) { - r = zd_ioread32_locked(&mac->chip, &tmp, CR_BCN_FIFO_SEMAPHORE); - if (r < 0) - goto release_sema; - if (time_is_before_eq_jiffies(message_jiffies)) { - message_jiffies = jiffies + HZ / 10; - dev_err(zd_mac_dev(mac), - "CR_BCN_FIFO_SEMAPHORE not ready\n"); - if (time_is_before_eq_jiffies(end_jiffies)) { - dev_err(zd_mac_dev(mac), - "Giving up beacon config.\n"); - r = -ETIMEDOUT; - goto reset_device; - } - } - msleep(20); - } - - ioreqs[req_pos].addr = CR_BCN_FIFO; - ioreqs[req_pos].value = full_len - 1; - req_pos++; - if (zd_chip_is_zd1211b(&mac->chip)) { - ioreqs[req_pos].addr = CR_BCN_LENGTH; - ioreqs[req_pos].value = full_len - 1; - req_pos++; - } - - for (j = 0 ; j < beacon->len; j++) { - ioreqs[req_pos].addr = CR_BCN_FIFO; - ioreqs[req_pos].value = *((u8 *)(beacon->data + j)); - req_pos++; - } - - for (j = 0; j < 4; j++) { - ioreqs[req_pos].addr = CR_BCN_FIFO; - ioreqs[req_pos].value = 0x0; - req_pos++; - } - - BUG_ON(req_pos != num_cmds); - - r = zd_iowrite32a_locked(&mac->chip, ioreqs, num_cmds); - -release_sema: - /* - * Try very hard to release device beacon semaphore, as otherwise - * device/driver can be left in unusable state. - */ - end_jiffies = jiffies + HZ / 2; /*~500ms*/ - ret = zd_iowrite32_locked(&mac->chip, 1, CR_BCN_FIFO_SEMAPHORE); - while (ret < 0) { - if (in_intr || time_is_before_eq_jiffies(end_jiffies)) { - ret = -ETIMEDOUT; - break; - } - - msleep(20); - ret = zd_iowrite32_locked(&mac->chip, 1, CR_BCN_FIFO_SEMAPHORE); - } - - if (ret < 0) - dev_err(zd_mac_dev(mac), "Could not release " - "CR_BCN_FIFO_SEMAPHORE!\n"); - if (r < 0 || ret < 0) { - if (r >= 0) - r = ret; - - /* We don't know if beacon was written successfully or not, - * so clear current. */ - zd_mac_free_cur_beacon_locked(mac); - - goto out; - } - - /* Beacon has now been written successfully, update current. */ - zd_mac_free_cur_beacon_locked(mac); - mac->beacon.cur_beacon = beacon; - beacon = NULL; - - /* 802.11b/g 2.4G CCK 1Mb - * 802.11a, not yet implemented, uses different values (see GPL vendor - * driver) - */ - r = zd_iowrite32_locked(&mac->chip, 0x00000400 | (full_len << 19), - CR_BCN_PLCP_CFG); -out: - kfree(ioreqs); -out_nofree: - kfree_skb(beacon); - mutex_unlock(&mac->chip.mutex); - - return r; - -reset_device: - zd_mac_free_cur_beacon_locked(mac); - kfree_skb(beacon); - - mutex_unlock(&mac->chip.mutex); - kfree(ioreqs); - - /* semaphore stuck, reset device to avoid fw freeze later */ - dev_warn(zd_mac_dev(mac), "CR_BCN_FIFO_SEMAPHORE stuck, " - "resetting device..."); - usb_queue_reset_device(mac->chip.usb.intf); - - return r; -} - -static int fill_ctrlset(struct zd_mac *mac, - struct sk_buff *skb) -{ - int r; - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; - unsigned int frag_len = skb->len + FCS_LEN; - unsigned int packet_length; - struct ieee80211_rate *txrate; - struct zd_ctrlset *cs = (struct zd_ctrlset *) - skb_push(skb, sizeof(struct zd_ctrlset)); - struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); - - ZD_ASSERT(frag_len <= 0xffff); - - /* - * Firmware computes the duration itself (for all frames except PSPoll) - * and needs the field set to 0 at input, otherwise firmware messes up - * duration_id and sets bits 14 and 15 on. - */ - if (!ieee80211_is_pspoll(hdr->frame_control)) - hdr->duration_id = 0; - - txrate = ieee80211_get_tx_rate(mac->hw, info); - - cs->modulation = txrate->hw_value; - if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) - cs->modulation = txrate->hw_value_short; - - cs->tx_length = cpu_to_le16(frag_len); - - cs_set_control(mac, cs, hdr, info); - - packet_length = frag_len + sizeof(struct zd_ctrlset) + 10; - ZD_ASSERT(packet_length <= 0xffff); - /* ZD1211B: Computing the length difference this way, gives us - * flexibility to compute the packet length. - */ - cs->packet_length = cpu_to_le16(zd_chip_is_zd1211b(&mac->chip) ? - packet_length - frag_len : packet_length); - - /* - * CURRENT LENGTH: - * - transmit frame length in microseconds - * - seems to be derived from frame length - * - see Cal_Us_Service() in zdinlinef.h - * - if macp->bTxBurstEnable is enabled, then multiply by 4 - * - bTxBurstEnable is never set in the vendor driver - * - * SERVICE: - * - "for PLCP configuration" - * - always 0 except in some situations at 802.11b 11M - * - see line 53 of zdinlinef.h - */ - cs->service = 0; - r = zd_calc_tx_length_us(&cs->service, ZD_RATE(cs->modulation), - le16_to_cpu(cs->tx_length)); - if (r < 0) - return r; - cs->current_length = cpu_to_le16(r); - cs->next_frame_length = 0; - - return 0; -} - -/** - * zd_op_tx - transmits a network frame to the device - * - * @dev: mac80211 hardware device - * @skb: socket buffer - * @control: the control structure - * - * This function transmit an IEEE 802.11 network frame to the device. The - * control block of the skbuff will be initialized. If necessary the incoming - * mac80211 queues will be stopped. - */ -static void zd_op_tx(struct ieee80211_hw *hw, - struct ieee80211_tx_control *control, - struct sk_buff *skb) -{ - struct zd_mac *mac = zd_hw_mac(hw); - struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); - int r; - - r = fill_ctrlset(mac, skb); - if (r) - goto fail; - - info->rate_driver_data[0] = hw; - - r = zd_usb_tx(&mac->chip.usb, skb); - if (r) - goto fail; - return; - -fail: - dev_kfree_skb(skb); -} - -/** - * filter_ack - filters incoming packets for acknowledgements - * @dev: the mac80211 device - * @rx_hdr: received header - * @stats: the status for the received packet - * - * This functions looks for ACK packets and tries to match them with the - * frames in the tx queue. If a match is found the frame will be dequeued and - * the upper layers is informed about the successful transmission. If - * mac80211 queues have been stopped and the number of frames still to be - * transmitted is low the queues will be opened again. - * - * Returns 1 if the frame was an ACK, 0 if it was ignored. - */ -static int filter_ack(struct ieee80211_hw *hw, struct ieee80211_hdr *rx_hdr, - struct ieee80211_rx_status *stats) -{ - struct zd_mac *mac = zd_hw_mac(hw); - struct sk_buff *skb; - struct sk_buff_head *q; - unsigned long flags; - int found = 0; - int i, position = 0; - - if (!ieee80211_is_ack(rx_hdr->frame_control)) - return 0; - - q = &mac->ack_wait_queue; - spin_lock_irqsave(&q->lock, flags); - skb_queue_walk(q, skb) { - struct ieee80211_hdr *tx_hdr; - - position ++; - - if (mac->ack_pending && skb_queue_is_first(q, skb)) - continue; - - tx_hdr = (struct ieee80211_hdr *)skb->data; - if (likely(ether_addr_equal(tx_hdr->addr2, rx_hdr->addr1))) - { - found = 1; - break; - } - } - - if (found) { - for (i=1; i<position; i++) { - skb = __skb_dequeue(q); - zd_mac_tx_status(hw, skb, - mac->ack_pending ? mac->ack_signal : 0, - NULL); - mac->ack_pending = 0; - } - - mac->ack_pending = 1; - mac->ack_signal = stats->signal; - - /* Prevent pending tx-packet on AP-mode */ - if (mac->type == NL80211_IFTYPE_AP) { - skb = __skb_dequeue(q); - zd_mac_tx_status(hw, skb, mac->ack_signal, NULL); - mac->ack_pending = 0; - } - } - - spin_unlock_irqrestore(&q->lock, flags); - return 1; -} - -int zd_mac_rx(struct ieee80211_hw *hw, const u8 *buffer, unsigned int length) -{ - struct zd_mac *mac = zd_hw_mac(hw); - struct ieee80211_rx_status stats; - const struct rx_status *status; - struct sk_buff *skb; - int bad_frame = 0; - __le16 fc; - int need_padding; - int i; - u8 rate; - - if (length < ZD_PLCP_HEADER_SIZE + 10 /* IEEE80211_1ADDR_LEN */ + - FCS_LEN + sizeof(struct rx_status)) - return -EINVAL; - - memset(&stats, 0, sizeof(stats)); - - /* Note about pass_failed_fcs and pass_ctrl access below: - * mac locking intentionally omitted here, as this is the only unlocked - * reader and the only writer is configure_filter. Plus, if there were - * any races accessing these variables, it wouldn't really matter. - * If mac80211 ever provides a way for us to access filter flags - * from outside configure_filter, we could improve on this. Also, this - * situation may change once we implement some kind of DMA-into-skb - * RX path. */ - - /* Caller has to ensure that length >= sizeof(struct rx_status). */ - status = (struct rx_status *) - (buffer + (length - sizeof(struct rx_status))); - if (status->frame_status & ZD_RX_ERROR) { - if (mac->pass_failed_fcs && - (status->frame_status & ZD_RX_CRC32_ERROR)) { - stats.flag |= RX_FLAG_FAILED_FCS_CRC; - bad_frame = 1; - } else { - return -EINVAL; - } - } - - stats.freq = zd_channels[_zd_chip_get_channel(&mac->chip) - 1].center_freq; - stats.band = IEEE80211_BAND_2GHZ; - stats.signal = zd_check_signal(hw, status->signal_strength); - - rate = zd_rx_rate(buffer, status); - - /* todo: return index in the big switches in zd_rx_rate instead */ - for (i = 0; i < mac->band.n_bitrates; i++) - if (rate == mac->band.bitrates[i].hw_value) - stats.rate_idx = i; - - length -= ZD_PLCP_HEADER_SIZE + sizeof(struct rx_status); - buffer += ZD_PLCP_HEADER_SIZE; - - /* Except for bad frames, filter each frame to see if it is an ACK, in - * which case our internal TX tracking is updated. Normally we then - * bail here as there's no need to pass ACKs on up to the stack, but - * there is also the case where the stack has requested us to pass - * control frames on up (pass_ctrl) which we must consider. */ - if (!bad_frame && - filter_ack(hw, (struct ieee80211_hdr *)buffer, &stats) - && !mac->pass_ctrl) - return 0; - - fc = get_unaligned((__le16*)buffer); - need_padding = ieee80211_is_data_qos(fc) ^ ieee80211_has_a4(fc); - - skb = dev_alloc_skb(length + (need_padding ? 2 : 0)); - if (skb == NULL) - return -ENOMEM; - if (need_padding) { - /* Make sure the payload data is 4 byte aligned. */ - skb_reserve(skb, 2); - } - - /* FIXME : could we avoid this big memcpy ? */ - memcpy(skb_put(skb, length), buffer, length); - - memcpy(IEEE80211_SKB_RXCB(skb), &stats, sizeof(stats)); - ieee80211_rx_irqsafe(hw, skb); - return 0; -} - -static int zd_op_add_interface(struct ieee80211_hw *hw, - struct ieee80211_vif *vif) -{ - struct zd_mac *mac = zd_hw_mac(hw); - - /* using NL80211_IFTYPE_UNSPECIFIED to indicate no mode selected */ - if (mac->type != NL80211_IFTYPE_UNSPECIFIED) - return -EOPNOTSUPP; - - switch (vif->type) { - case NL80211_IFTYPE_MONITOR: - case NL80211_IFTYPE_MESH_POINT: - case NL80211_IFTYPE_STATION: - case NL80211_IFTYPE_ADHOC: - case NL80211_IFTYPE_AP: - mac->type = vif->type; - break; - default: - return -EOPNOTSUPP; - } - - mac->vif = vif; - - return set_mac_and_bssid(mac); -} - -static void zd_op_remove_interface(struct ieee80211_hw *hw, - struct ieee80211_vif *vif) -{ - struct zd_mac *mac = zd_hw_mac(hw); - mac->type = NL80211_IFTYPE_UNSPECIFIED; - mac->vif = NULL; - zd_set_beacon_interval(&mac->chip, 0, 0, NL80211_IFTYPE_UNSPECIFIED); - zd_write_mac_addr(&mac->chip, NULL); - - zd_mac_free_cur_beacon(mac); -} - -static int zd_op_config(struct ieee80211_hw *hw, u32 changed) -{ - struct zd_mac *mac = zd_hw_mac(hw); - struct ieee80211_conf *conf = &hw->conf; - - spin_lock_irq(&mac->lock); - mac->channel = conf->chandef.chan->hw_value; - spin_unlock_irq(&mac->lock); - - return zd_chip_set_channel(&mac->chip, conf->chandef.chan->hw_value); -} - -static void zd_beacon_done(struct zd_mac *mac) -{ - struct sk_buff *skb, *beacon; - - if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags)) - return; - if (!mac->vif || mac->vif->type != NL80211_IFTYPE_AP) - return; - - /* - * Send out buffered broad- and multicast frames. - */ - while (!ieee80211_queue_stopped(mac->hw, 0)) { - skb = ieee80211_get_buffered_bc(mac->hw, mac->vif); - if (!skb) - break; - zd_op_tx(mac->hw, NULL, skb); - } - - /* - * Fetch next beacon so that tim_count is updated. - */ - beacon = ieee80211_beacon_get(mac->hw, mac->vif); - if (beacon) - zd_mac_config_beacon(mac->hw, beacon, true); - - spin_lock_irq(&mac->lock); - mac->beacon.last_update = jiffies; - spin_unlock_irq(&mac->lock); -} - -static void zd_process_intr(struct work_struct *work) -{ - u16 int_status; - unsigned long flags; - struct zd_mac *mac = container_of(work, struct zd_mac, process_intr); - - spin_lock_irqsave(&mac->lock, flags); - int_status = le16_to_cpu(*(__le16 *)(mac->intr_buffer + 4)); - spin_unlock_irqrestore(&mac->lock, flags); - - if (int_status & INT_CFG_NEXT_BCN) { - /*dev_dbg_f_limit(zd_mac_dev(mac), "INT_CFG_NEXT_BCN\n");*/ - zd_beacon_done(mac); - } else { - dev_dbg_f(zd_mac_dev(mac), "Unsupported interrupt\n"); - } - - zd_chip_enable_hwint(&mac->chip); -} - - -static u64 zd_op_prepare_multicast(struct ieee80211_hw *hw, - struct netdev_hw_addr_list *mc_list) -{ - struct zd_mac *mac = zd_hw_mac(hw); - struct zd_mc_hash hash; - struct netdev_hw_addr *ha; - - zd_mc_clear(&hash); - - netdev_hw_addr_list_for_each(ha, mc_list) { - dev_dbg_f(zd_mac_dev(mac), "mc addr %pM\n", ha->addr); - zd_mc_add_addr(&hash, ha->addr); - } - - return hash.low | ((u64)hash.high << 32); -} - -#define SUPPORTED_FIF_FLAGS \ - (FIF_ALLMULTI | FIF_FCSFAIL | FIF_CONTROL | \ - FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC) -static void zd_op_configure_filter(struct ieee80211_hw *hw, - unsigned int changed_flags, - unsigned int *new_flags, - u64 multicast) -{ - struct zd_mc_hash hash = { - .low = multicast, - .high = multicast >> 32, - }; - struct zd_mac *mac = zd_hw_mac(hw); - unsigned long flags; - int r; - - /* Only deal with supported flags */ - changed_flags &= SUPPORTED_FIF_FLAGS; - *new_flags &= SUPPORTED_FIF_FLAGS; - - /* - * If multicast parameter (as returned by zd_op_prepare_multicast) - * has changed, no bit in changed_flags is set. To handle this - * situation, we do not return if changed_flags is 0. If we do so, - * we will have some issue with IPv6 which uses multicast for link - * layer address resolution. - */ - if (*new_flags & FIF_ALLMULTI) - zd_mc_add_all(&hash); - - spin_lock_irqsave(&mac->lock, flags); - mac->pass_failed_fcs = !!(*new_flags & FIF_FCSFAIL); - mac->pass_ctrl = !!(*new_flags & FIF_CONTROL); - mac->multicast_hash = hash; - spin_unlock_irqrestore(&mac->lock, flags); - - zd_chip_set_multicast_hash(&mac->chip, &hash); - - if (changed_flags & FIF_CONTROL) { - r = set_rx_filter(mac); - if (r) - dev_err(zd_mac_dev(mac), "set_rx_filter error %d\n", r); - } - - /* no handling required for FIF_OTHER_BSS as we don't currently - * do BSSID filtering */ - /* FIXME: in future it would be nice to enable the probe response - * filter (so that the driver doesn't see them) until - * FIF_BCN_PRBRESP_PROMISC is set. however due to atomicity here, we'd - * have to schedule work to enable prbresp reception, which might - * happen too late. For now we'll just listen and forward them all the - * time. */ -} - -static void set_rts_cts(struct zd_mac *mac, unsigned int short_preamble) -{ - mutex_lock(&mac->chip.mutex); - zd_chip_set_rts_cts_rate_locked(&mac->chip, short_preamble); - mutex_unlock(&mac->chip.mutex); -} - -static void zd_op_bss_info_changed(struct ieee80211_hw *hw, - struct ieee80211_vif *vif, - struct ieee80211_bss_conf *bss_conf, - u32 changes) -{ - struct zd_mac *mac = zd_hw_mac(hw); - int associated; - - dev_dbg_f(zd_mac_dev(mac), "changes: %x\n", changes); - - if (mac->type == NL80211_IFTYPE_MESH_POINT || - mac->type == NL80211_IFTYPE_ADHOC || - mac->type == NL80211_IFTYPE_AP) { - associated = true; - if (changes & BSS_CHANGED_BEACON) { - struct sk_buff *beacon = ieee80211_beacon_get(hw, vif); - - if (beacon) { - zd_chip_disable_hwint(&mac->chip); - zd_mac_config_beacon(hw, beacon, false); - zd_chip_enable_hwint(&mac->chip); - } - } - - if (changes & BSS_CHANGED_BEACON_ENABLED) { - u16 interval = 0; - u8 period = 0; - - if (bss_conf->enable_beacon) { - period = bss_conf->dtim_period; - interval = bss_conf->beacon_int; - } - - spin_lock_irq(&mac->lock); - mac->beacon.period = period; - mac->beacon.interval = interval; - mac->beacon.last_update = jiffies; - spin_unlock_irq(&mac->lock); - - zd_set_beacon_interval(&mac->chip, interval, period, - mac->type); - } - } else - associated = is_valid_ether_addr(bss_conf->bssid); - - spin_lock_irq(&mac->lock); - mac->associated = associated; - spin_unlock_irq(&mac->lock); - - /* TODO: do hardware bssid filtering */ - - if (changes & BSS_CHANGED_ERP_PREAMBLE) { - spin_lock_irq(&mac->lock); - mac->short_preamble = bss_conf->use_short_preamble; - spin_unlock_irq(&mac->lock); - - set_rts_cts(mac, bss_conf->use_short_preamble); - } -} - -static u64 zd_op_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif) -{ - struct zd_mac *mac = zd_hw_mac(hw); - return zd_chip_get_tsf(&mac->chip); -} - -static const struct ieee80211_ops zd_ops = { - .tx = zd_op_tx, - .start = zd_op_start, - .stop = zd_op_stop, - .add_interface = zd_op_add_interface, - .remove_interface = zd_op_remove_interface, - .config = zd_op_config, - .prepare_multicast = zd_op_prepare_multicast, - .configure_filter = zd_op_configure_filter, - .bss_info_changed = zd_op_bss_info_changed, - .get_tsf = zd_op_get_tsf, -}; - -struct ieee80211_hw *zd_mac_alloc_hw(struct usb_interface *intf) -{ - struct zd_mac *mac; - struct ieee80211_hw *hw; - - hw = ieee80211_alloc_hw(sizeof(struct zd_mac), &zd_ops); - if (!hw) { - dev_dbg_f(&intf->dev, "out of memory\n"); - return NULL; - } - - mac = zd_hw_mac(hw); - - memset(mac, 0, sizeof(*mac)); - spin_lock_init(&mac->lock); - mac->hw = hw; - - mac->type = NL80211_IFTYPE_UNSPECIFIED; - - memcpy(mac->channels, zd_channels, sizeof(zd_channels)); - memcpy(mac->rates, zd_rates, sizeof(zd_rates)); - mac->band.n_bitrates = ARRAY_SIZE(zd_rates); - mac->band.bitrates = mac->rates; - mac->band.n_channels = ARRAY_SIZE(zd_channels); - mac->band.channels = mac->channels; - - hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &mac->band; - - ieee80211_hw_set(hw, MFP_CAPABLE); - ieee80211_hw_set(hw, HOST_BROADCAST_PS_BUFFERING); - ieee80211_hw_set(hw, RX_INCLUDES_FCS); - ieee80211_hw_set(hw, SIGNAL_UNSPEC); - - hw->wiphy->interface_modes = - BIT(NL80211_IFTYPE_MESH_POINT) | - BIT(NL80211_IFTYPE_STATION) | - BIT(NL80211_IFTYPE_ADHOC) | - BIT(NL80211_IFTYPE_AP); - - hw->max_signal = 100; - hw->queues = 1; - hw->extra_tx_headroom = sizeof(struct zd_ctrlset); - - /* - * Tell mac80211 that we support multi rate retries - */ - hw->max_rates = IEEE80211_TX_MAX_RATES; - hw->max_rate_tries = 18; /* 9 rates * 2 retries/rate */ - - skb_queue_head_init(&mac->ack_wait_queue); - mac->ack_pending = 0; - - zd_chip_init(&mac->chip, hw, intf); - housekeeping_init(mac); - beacon_init(mac); - INIT_WORK(&mac->process_intr, zd_process_intr); - - SET_IEEE80211_DEV(hw, &intf->dev); - return hw; -} - -#define BEACON_WATCHDOG_DELAY round_jiffies_relative(HZ) - -static void beacon_watchdog_handler(struct work_struct *work) -{ - struct zd_mac *mac = - container_of(work, struct zd_mac, beacon.watchdog_work.work); - struct sk_buff *beacon; - unsigned long timeout; - int interval, period; - - if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags)) - goto rearm; - if (mac->type != NL80211_IFTYPE_AP || !mac->vif) - goto rearm; - - spin_lock_irq(&mac->lock); - interval = mac->beacon.interval; - period = mac->beacon.period; - timeout = mac->beacon.last_update + - msecs_to_jiffies(interval * 1024 / 1000) * 3; - spin_unlock_irq(&mac->lock); - - if (interval > 0 && time_is_before_jiffies(timeout)) { - dev_dbg_f(zd_mac_dev(mac), "beacon interrupt stalled, " - "restarting. " - "(interval: %d, dtim: %d)\n", - interval, period); - - zd_chip_disable_hwint(&mac->chip); - - beacon = ieee80211_beacon_get(mac->hw, mac->vif); - if (beacon) { - zd_mac_free_cur_beacon(mac); - - zd_mac_config_beacon(mac->hw, beacon, false); - } - - zd_set_beacon_interval(&mac->chip, interval, period, mac->type); - - zd_chip_enable_hwint(&mac->chip); - - spin_lock_irq(&mac->lock); - mac->beacon.last_update = jiffies; - spin_unlock_irq(&mac->lock); - } - -rearm: - queue_delayed_work(zd_workqueue, &mac->beacon.watchdog_work, - BEACON_WATCHDOG_DELAY); -} - -static void beacon_init(struct zd_mac *mac) -{ - INIT_DELAYED_WORK(&mac->beacon.watchdog_work, beacon_watchdog_handler); -} - -static void beacon_enable(struct zd_mac *mac) -{ - dev_dbg_f(zd_mac_dev(mac), "\n"); - - mac->beacon.last_update = jiffies; - queue_delayed_work(zd_workqueue, &mac->beacon.watchdog_work, - BEACON_WATCHDOG_DELAY); -} - -static void beacon_disable(struct zd_mac *mac) -{ - dev_dbg_f(zd_mac_dev(mac), "\n"); - cancel_delayed_work_sync(&mac->beacon.watchdog_work); - - zd_mac_free_cur_beacon(mac); -} - -#define LINK_LED_WORK_DELAY HZ - -static void link_led_handler(struct work_struct *work) -{ - struct zd_mac *mac = - container_of(work, struct zd_mac, housekeeping.link_led_work.work); - struct zd_chip *chip = &mac->chip; - int is_associated; - int r; - - if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags)) - goto requeue; - - spin_lock_irq(&mac->lock); - is_associated = mac->associated; - spin_unlock_irq(&mac->lock); - - r = zd_chip_control_leds(chip, - is_associated ? ZD_LED_ASSOCIATED : ZD_LED_SCANNING); - if (r) - dev_dbg_f(zd_mac_dev(mac), "zd_chip_control_leds error %d\n", r); - -requeue: - queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work, - LINK_LED_WORK_DELAY); -} - -static void housekeeping_init(struct zd_mac *mac) -{ - INIT_DELAYED_WORK(&mac->housekeeping.link_led_work, link_led_handler); -} - -static void housekeeping_enable(struct zd_mac *mac) -{ - dev_dbg_f(zd_mac_dev(mac), "\n"); - queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work, - 0); -} - -static void housekeeping_disable(struct zd_mac *mac) -{ - dev_dbg_f(zd_mac_dev(mac), "\n"); - cancel_delayed_work_sync(&mac->housekeeping.link_led_work); - zd_chip_control_leds(&mac->chip, ZD_LED_OFF); -} |