diff options
Diffstat (limited to 'drivers/net/wireless/zd1211rw/zd_mac.c')
| -rw-r--r-- | drivers/net/wireless/zd1211rw/zd_mac.c | 1916 |
1 files changed, 1167 insertions, 749 deletions
diff --git a/drivers/net/wireless/zd1211rw/zd_mac.c b/drivers/net/wireless/zd1211rw/zd_mac.c index 2d12837052b..e7af261e919 100644 --- a/drivers/net/wireless/zd1211rw/zd_mac.c +++ b/drivers/net/wireless/zd1211rw/zd_mac.c @@ -1,4 +1,9 @@ -/* zd_mac.c +/* 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 @@ -11,13 +16,12 @@ * 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, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include <linux/netdevice.h> #include <linux/etherdevice.h> -#include <linux/wireless.h> +#include <linux/slab.h> #include <linux/usb.h> #include <linux/jiffies.h> #include <net/ieee80211_radiotap.h> @@ -25,93 +29,190 @@ #include "zd_def.h" #include "zd_chip.h" #include "zd_mac.h" -#include "zd_ieee80211.h" -#include "zd_netdev.h" #include "zd_rf.h" -#include "zd_util.h" -static void ieee_init(struct ieee80211_device *ieee); -static void softmac_init(struct ieee80211softmac_device *sm); +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; +} -int zd_mac_init(struct zd_mac *mac, - struct net_device *netdev, - struct usb_interface *intf) +static int zd_check_signal(struct ieee80211_hw *hw, int signal) { - struct ieee80211_device *ieee = zd_netdev_ieee80211(netdev); + struct zd_mac *mac = zd_hw_mac(hw); - memset(mac, 0, sizeof(*mac)); - spin_lock_init(&mac->lock); - mac->netdev = netdev; + 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); - ieee_init(ieee); - softmac_init(ieee80211_priv(netdev)); - zd_chip_init(&mac->chip, netdev, intf); - housekeeping_init(mac); - return 0; + if (signal < 0) + signal = 0; + else if (signal > 100) + signal = 100; + + return signal; } -static int reset_channel(struct zd_mac *mac) +int zd_mac_preinit_hw(struct ieee80211_hw *hw) { int r; - unsigned long flags; - const struct channel_range *range; + u8 addr[ETH_ALEN]; + struct zd_mac *mac = zd_hw_mac(hw); - spin_lock_irqsave(&mac->lock, flags); - range = zd_channel_range(mac->regdomain); - if (!range->start) { - r = -EINVAL; - goto out; - } - mac->requested_channel = range->start; - r = 0; -out: - spin_unlock_irqrestore(&mac->lock, flags); - return r; + 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 zd_mac *mac, u8 device_type) +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; - u8 addr[ETH_ALEN]; + char alpha2[2]; u8 default_regdomain; r = zd_chip_enable_int(chip); if (r) goto out; - r = zd_chip_init_hw(chip, device_type); + r = zd_chip_init_hw(chip); if (r) goto disable_int; - zd_get_e2p_mac_addr(chip, addr); - r = zd_write_mac_addr(chip, addr); - if (r) - goto disable_int; ZD_ASSERT(!irqs_disabled()); - spin_lock_irq(&mac->lock); - memcpy(mac->netdev->dev_addr, addr, ETH_ALEN); - spin_unlock_irq(&mac->lock); r = zd_read_regdomain(chip, &default_regdomain); if (r) goto disable_int; - if (!zd_regdomain_supported(default_regdomain)) { - dev_dbg_f(zd_mac_dev(mac), - "Regulatory Domain %#04x is not supported.\n", - default_regdomain); - r = -EINVAL; - goto disable_int; - } spin_lock_irq(&mac->lock); mac->regdomain = mac->default_regdomain = default_regdomain; spin_unlock_irq(&mac->lock); - r = reset_channel(mac); - if (r) - goto disable_int; /* We must inform the device that we are doing encryption/decryption in * software at the moment. */ @@ -119,11 +220,11 @@ int zd_mac_init_hw(struct zd_mac *mac, u8 device_type) if (r) goto disable_int; - r = zd_geo_init(zd_mac_to_ieee80211(mac), mac->regdomain); + r = zd_reg2alpha2(mac->regdomain, alpha2); if (r) goto disable_int; - r = 0; + r = regulatory_hint(hw->wiphy, alpha2); disable_int: zd_chip_disable_int(chip); out: @@ -132,34 +233,65 @@ out: 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 reset_mode(struct zd_mac *mac) +static int set_rx_filter(struct zd_mac *mac) { - struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac); - struct zd_ioreq32 ioreqs[3] = { - { CR_RX_FILTER, STA_RX_FILTER }, - { CR_SNIFFER_ON, 0U }, - }; + unsigned long flags; + u32 filter = STA_RX_FILTER; - if (ieee->iw_mode == IW_MODE_MONITOR) { - ioreqs[0].value = 0xffffffff; - ioreqs[1].value = 0x1; - ioreqs[2].value = ENC_SNIFFER; - } + spin_lock_irqsave(&mac->lock, flags); + if (mac->pass_ctrl) + filter |= RX_FILTER_CTRL; + spin_unlock_irqrestore(&mac->lock, flags); - return zd_iowrite32a(&mac->chip, ioreqs, 3); + return zd_iowrite32(&mac->chip, CR_RX_FILTER, filter); } -int zd_mac_open(struct net_device *netdev) +static int set_mac_and_bssid(struct zd_mac *mac) { - struct zd_mac *mac = zd_netdev_mac(netdev); + 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; @@ -167,27 +299,38 @@ int zd_mac_open(struct net_device *netdev) r = zd_chip_set_basic_rates(chip, CR_RATES_80211B | CR_RATES_80211G); if (r < 0) goto disable_int; - r = reset_mode(mac); + 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) + if (r < 0) { + dev_err(zd_chip_dev(chip), + "%s: failed to set radio on\n", __func__); goto disable_int; - r = zd_chip_set_channel(chip, mac->requested_channel); - if (r < 0) - goto disable_radio; - r = zd_chip_enable_rx(chip); + } + r = zd_chip_enable_rxtx(chip); if (r < 0) goto disable_radio; r = zd_chip_enable_hwint(chip); if (r < 0) - goto disable_rx; + goto disable_rxtx; housekeeping_enable(mac); - ieee80211softmac_start(netdev); + beacon_enable(mac); + set_bit(ZD_DEVICE_RUNNING, &mac->flags); return 0; -disable_rx: - zd_chip_disable_rx(chip); +disable_rxtx: + zd_chip_disable_rxtx(chip); disable_radio: zd_chip_switch_radio_off(chip); disable_int: @@ -196,323 +339,306 @@ out: return r; } -int zd_mac_stop(struct net_device *netdev) +void zd_op_stop(struct ieee80211_hw *hw) { - struct zd_mac *mac = zd_netdev_mac(netdev); + 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; - netif_stop_queue(netdev); + clear_bit(ZD_DEVICE_RUNNING, &mac->flags); - /* - * The order here deliberately is a little different from the open() + /* 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 softmac after we have stopped it. + * frames to be processed by mac80211 after we have stopped it. */ - zd_chip_disable_rx(chip); + zd_chip_disable_rxtx(chip); + beacon_disable(mac); housekeeping_disable(mac); - ieee80211softmac_stop(netdev); + flush_workqueue(zd_workqueue); zd_chip_disable_hwint(chip); zd_chip_switch_radio_off(chip); zd_chip_disable_int(chip); - return 0; -} - -int zd_mac_set_mac_address(struct net_device *netdev, void *p) -{ - int r; - unsigned long flags; - struct sockaddr *addr = p; - struct zd_mac *mac = zd_netdev_mac(netdev); - struct zd_chip *chip = &mac->chip; - - if (!is_valid_ether_addr(addr->sa_data)) - return -EADDRNOTAVAIL; - dev_dbg_f(zd_mac_dev(mac), - "Setting MAC to " MAC_FMT "\n", MAC_ARG(addr->sa_data)); - - r = zd_write_mac_addr(chip, addr->sa_data); - if (r) - return r; - - spin_lock_irqsave(&mac->lock, flags); - memcpy(netdev->dev_addr, addr->sa_data, ETH_ALEN); - spin_unlock_irqrestore(&mac->lock, flags); - - return 0; + while ((skb = skb_dequeue(ack_wait_queue))) + dev_kfree_skb_any(skb); } -int zd_mac_set_regdomain(struct zd_mac *mac, u8 regdomain) +int zd_restore_settings(struct zd_mac *mac) { - int r; + struct sk_buff *beacon; + struct zd_mc_hash multicast_hash; + unsigned int short_preamble; + int r, beacon_interval, beacon_period; u8 channel; - ZD_ASSERT(!irqs_disabled()); + dev_dbg_f(zd_mac_dev(mac), "\n"); + spin_lock_irq(&mac->lock); - if (regdomain == 0) { - regdomain = mac->default_regdomain; - } - if (!zd_regdomain_supported(regdomain)) { - spin_unlock_irq(&mac->lock); - return -EINVAL; - } - mac->regdomain = regdomain; - channel = mac->requested_channel; + 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 = zd_geo_init(zd_mac_to_ieee80211(mac), regdomain); - if (r) + 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; - if (!zd_regdomain_supports_channel(regdomain, channel)) { - r = reset_channel(mac); - if (r) - return r; } - return 0; -} + 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; + } -u8 zd_mac_get_regdomain(struct zd_mac *mac) -{ - unsigned long flags; - u8 regdomain; + set_rts_cts(mac, short_preamble); - spin_lock_irqsave(&mac->lock, flags); - regdomain = mac->regdomain; - spin_unlock_irqrestore(&mac->lock, flags); - return regdomain; -} + 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; + } -static void set_channel(struct net_device *netdev, u8 channel) -{ - struct zd_mac *mac = zd_netdev_mac(netdev); + 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); + } - dev_dbg_f(zd_mac_dev(mac), "channel %d\n", channel); + 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); + } - zd_chip_set_channel(&mac->chip, channel); + return 0; } -/* TODO: Should not work in Managed mode. */ -int zd_mac_request_channel(struct zd_mac *mac, u8 channel) +/** + * 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) { - unsigned long lock_flags; - struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac); + 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; - if (ieee->iw_mode == IW_MODE_INFRA) - return -EPERM; + ieee80211_tx_info_clear_status(info); - spin_lock_irqsave(&mac->lock, lock_flags); - if (!zd_regdomain_supports_channel(mac->regdomain, channel)) { - spin_unlock_irqrestore(&mac->lock, lock_flags); - return -EINVAL; + if (tx_status) { + success = !tx_status->failure; + retry = tx_status->retry + success; } - mac->requested_channel = channel; - spin_unlock_irqrestore(&mac->lock, lock_flags); - if (netif_running(mac->netdev)) - return zd_chip_set_channel(&mac->chip, channel); - else - return 0; -} - -int zd_mac_get_channel(struct zd_mac *mac, u8 *channel, u8 *flags) -{ - struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac); - *channel = zd_chip_get_channel(&mac->chip); - if (ieee->iw_mode != IW_MODE_INFRA) { - spin_lock_irq(&mac->lock); - *flags = *channel == mac->requested_channel ? - MAC_FIXED_CHANNEL : 0; - spin_unlock(&mac->lock); + if (success) { + /* success */ + info->flags |= IEEE80211_TX_STAT_ACK; } else { - *flags = 0; + /* failure */ + info->flags &= ~IEEE80211_TX_STAT_ACK; } - dev_dbg_f(zd_mac_dev(mac), "channel %u flags %u\n", *channel, *flags); - return 0; -} -/* If wrong rate is given, we are falling back to the slowest rate: 1MBit/s */ -static u8 cs_typed_rate(u8 cs_rate) -{ - static const u8 typed_rates[16] = { - [ZD_CS_CCK_RATE_1M] = ZD_CS_CCK|ZD_CS_CCK_RATE_1M, - [ZD_CS_CCK_RATE_2M] = ZD_CS_CCK|ZD_CS_CCK_RATE_2M, - [ZD_CS_CCK_RATE_5_5M] = ZD_CS_CCK|ZD_CS_CCK_RATE_5_5M, - [ZD_CS_CCK_RATE_11M] = ZD_CS_CCK|ZD_CS_CCK_RATE_11M, - [ZD_OFDM_RATE_6M] = ZD_CS_OFDM|ZD_OFDM_RATE_6M, - [ZD_OFDM_RATE_9M] = ZD_CS_OFDM|ZD_OFDM_RATE_9M, - [ZD_OFDM_RATE_12M] = ZD_CS_OFDM|ZD_OFDM_RATE_12M, - [ZD_OFDM_RATE_18M] = ZD_CS_OFDM|ZD_OFDM_RATE_18M, - [ZD_OFDM_RATE_24M] = ZD_CS_OFDM|ZD_OFDM_RATE_24M, - [ZD_OFDM_RATE_36M] = ZD_CS_OFDM|ZD_OFDM_RATE_36M, - [ZD_OFDM_RATE_48M] = ZD_CS_OFDM|ZD_OFDM_RATE_48M, - [ZD_OFDM_RATE_54M] = ZD_CS_OFDM|ZD_OFDM_RATE_54M, - }; + 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); - ZD_ASSERT(ZD_CS_RATE_MASK == 0x0f); - return typed_rates[cs_rate & ZD_CS_RATE_MASK]; -} + info->status.rates[0].idx = retries->rate[0]; + info->status.rates[0].count = 1; // (retry > 1 ? 2 : 1); -/* Fallback to lowest rate, if rate is unknown. */ -static u8 rate_to_cs_rate(u8 rate) -{ - switch (rate) { - case IEEE80211_CCK_RATE_2MB: - return ZD_CS_CCK_RATE_2M; - case IEEE80211_CCK_RATE_5MB: - return ZD_CS_CCK_RATE_5_5M; - case IEEE80211_CCK_RATE_11MB: - return ZD_CS_CCK_RATE_11M; - case IEEE80211_OFDM_RATE_6MB: - return ZD_OFDM_RATE_6M; - case IEEE80211_OFDM_RATE_9MB: - return ZD_OFDM_RATE_9M; - case IEEE80211_OFDM_RATE_12MB: - return ZD_OFDM_RATE_12M; - case IEEE80211_OFDM_RATE_18MB: - return ZD_OFDM_RATE_18M; - case IEEE80211_OFDM_RATE_24MB: - return ZD_OFDM_RATE_24M; - case IEEE80211_OFDM_RATE_36MB: - return ZD_OFDM_RATE_36M; - case IEEE80211_OFDM_RATE_48MB: - return ZD_OFDM_RATE_48M; - case IEEE80211_OFDM_RATE_54MB: - return ZD_OFDM_RATE_54M; + 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); } - return ZD_CS_CCK_RATE_1M; -} - -int zd_mac_set_mode(struct zd_mac *mac, u32 mode) -{ - struct ieee80211_device *ieee; - - switch (mode) { - case IW_MODE_AUTO: - case IW_MODE_ADHOC: - case IW_MODE_INFRA: - mac->netdev->type = ARPHRD_ETHER; - break; - case IW_MODE_MONITOR: - mac->netdev->type = ARPHRD_IEEE80211_RADIOTAP; - break; - default: - dev_dbg_f(zd_mac_dev(mac), "wrong mode %u\n", mode); - return -EINVAL; + 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 */ - ieee = zd_mac_to_ieee80211(mac); - ZD_ASSERT(!irqs_disabled()); - spin_lock_irq(&ieee->lock); - ieee->iw_mode = mode; - spin_unlock_irq(&ieee->lock); - - if (netif_running(mac->netdev)) - return reset_mode(mac); - - return 0; + info->status.ack_signal = zd_check_signal(hw, ackssi); + ieee80211_tx_status_irqsafe(hw, skb); } -int zd_mac_get_mode(struct zd_mac *mac, u32 *mode) +/** + * 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; - struct ieee80211_device *ieee; - - ieee = zd_mac_to_ieee80211(mac); - spin_lock_irqsave(&ieee->lock, flags); - *mode = ieee->iw_mode; - spin_unlock_irqrestore(&ieee->lock, flags); - return 0; -} - -int zd_mac_get_range(struct zd_mac *mac, struct iw_range *range) -{ - int i; - const struct channel_range *channel_range; - u8 regdomain; - - memset(range, 0, sizeof(*range)); + 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; + } - /* FIXME: Not so important and depends on the mode. For 802.11g - * usually this value is used. It seems to be that Bit/s number is - * given here. - */ - range->throughput = 27 * 1000 * 1000; + tx_hdr = (struct ieee80211_hdr *)skb->data; - range->max_qual.qual = 100; - range->max_qual.level = 100; + /* we skip all frames not matching the reported destination */ + if (unlikely(!ether_addr_equal(tx_hdr->addr1, tx_status->mac))) + continue; - /* FIXME: Needs still to be tuned. */ - range->avg_qual.qual = 71; - range->avg_qual.level = 80; + /* we skip all frames not matching the reported final rate */ - /* FIXME: depends on standard? */ - range->min_rts = 256; - range->max_rts = 2346; + 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; - range->min_frag = MIN_FRAG_THRESHOLD; - range->max_frag = MAX_FRAG_THRESHOLD; + final_idx = retries->rate[retry - 1]; + final_rate = zd_rates[final_idx].hw_value; - range->max_encoding_tokens = WEP_KEYS; - range->num_encoding_sizes = 2; - range->encoding_size[0] = 5; - range->encoding_size[1] = WEP_KEY_LEN; + if (final_rate != tx_status->rate) { + continue; + } - range->we_version_compiled = WIRELESS_EXT; - range->we_version_source = 20; + found = 1; + break; + } - ZD_ASSERT(!irqs_disabled()); - spin_lock_irq(&mac->lock); - regdomain = mac->regdomain; - spin_unlock_irq(&mac->lock); - channel_range = zd_channel_range(regdomain); + 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; + } + } - range->num_channels = channel_range->end - channel_range->start; - range->old_num_channels = range->num_channels; - range->num_frequency = range->num_channels; - range->old_num_frequency = range->num_frequency; + spin_unlock_irqrestore(&q->lock, flags); +} - for (i = 0; i < range->num_frequency; i++) { - struct iw_freq *freq = &range->freq[i]; - freq->i = channel_range->start + i; - zd_channel_to_freq(freq, freq->i); +/** + * 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; + } } - - return 0; } -static int zd_calc_tx_length_us(u8 *service, u8 cs_rate, u16 tx_length) +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_CS_CCK_RATE_1M] = 1, - [ZD_CS_CCK_RATE_2M] = 2, - [ZD_CS_CCK_RATE_5_5M] = 11, /* bits must be doubled */ - [ZD_CS_CCK_RATE_11M] = 11, - [ZD_OFDM_RATE_6M] = 6, - [ZD_OFDM_RATE_9M] = 9, - [ZD_OFDM_RATE_12M] = 12, - [ZD_OFDM_RATE_18M] = 18, - [ZD_OFDM_RATE_24M] = 24, - [ZD_OFDM_RATE_36M] = 36, - [ZD_OFDM_RATE_48M] = 48, - [ZD_OFDM_RATE_54M] = 54, + [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[cs_rate]; + divisor = rate_divisor[ZD_PURE_RATE(zd_rate)]; if (divisor == 0) return -EINVAL; - switch (cs_rate) { - case ZD_CS_CCK_RATE_5_5M: + switch (zd_rate) { + case ZD_CCK_RATE_5_5M: bits = (2*bits) + 10; /* round up to the next integer */ break; - case ZD_CS_CCK_RATE_11M: + case ZD_CCK_RATE_11M: if (service) { u32 t = bits % 11; *service &= ~ZD_PLCP_SERVICE_LENGTH_EXTENSION; @@ -527,137 +653,251 @@ static int zd_calc_tx_length_us(u8 *service, u8 cs_rate, u16 tx_length) return bits/divisor; } -enum { - R2M_SHORT_PREAMBLE = 0x01, - R2M_11A = 0x02, -}; - -static u8 cs_rate_to_modulation(u8 cs_rate, int flags) -{ - u8 modulation; - - modulation = cs_typed_rate(cs_rate); - if (flags & R2M_SHORT_PREAMBLE) { - switch (ZD_CS_RATE(modulation)) { - case ZD_CS_CCK_RATE_2M: - case ZD_CS_CCK_RATE_5_5M: - case ZD_CS_CCK_RATE_11M: - modulation |= ZD_CS_CCK_PREA_SHORT; - return modulation; - } - } - if (flags & R2M_11A) { - if (ZD_CS_TYPE(modulation) == ZD_CS_OFDM) - modulation |= ZD_CS_OFDM_MODE_11A; - } - return modulation; -} - -static void cs_set_modulation(struct zd_mac *mac, struct zd_ctrlset *cs, - struct ieee80211_hdr_4addr *hdr) -{ - struct ieee80211softmac_device *softmac = ieee80211_priv(mac->netdev); - u16 ftype = WLAN_FC_GET_TYPE(le16_to_cpu(hdr->frame_ctl)); - u8 rate, cs_rate; - int is_mgt = (ftype == IEEE80211_FTYPE_MGMT) != 0; - - /* FIXME: 802.11a? short preamble? */ - rate = ieee80211softmac_suggest_txrate(softmac, - is_multicast_ether_addr(hdr->addr1), is_mgt); - - cs_rate = rate_to_cs_rate(rate); - cs->modulation = cs_rate_to_modulation(cs_rate, 0); -} - static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs, - struct ieee80211_hdr_4addr *header) + struct ieee80211_hdr *header, + struct ieee80211_tx_info *info) { - unsigned int tx_length = le16_to_cpu(cs->tx_length); - u16 fctl = le16_to_cpu(header->frame_ctl); - u16 ftype = WLAN_FC_GET_TYPE(fctl); - u16 stype = WLAN_FC_GET_STYPE(fctl); - /* - * CONTROL: - * - start at 0x00 - * - if fragment 0, enable bit 0 + * CONTROL TODO: * - if backoff needed, enable bit 0 * - if burst (backoff not needed) disable bit 0 - * - if multicast, enable bit 1 - * - if PS-POLL frame, enable bit 2 - * - if in INDEPENDENT_BSS mode and zd1205_DestPowerSave, then enable - * bit 4 (FIXME: wtf) - * - if frag_len > RTS threshold, set bit 5 as long if it isnt - * multicast or mgt - * - if bit 5 is set, and we are in OFDM mode, unset bit 5 and set bit - * 7 */ cs->control = 0; /* First fragment */ - if (WLAN_GET_SEQ_FRAG(le16_to_cpu(header->seq_ctl)) == 0) + if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) cs->control |= ZD_CS_NEED_RANDOM_BACKOFF; - /* Multicast */ - if (is_multicast_ether_addr(header->addr1)) - cs->control |= ZD_CS_MULTICAST; + /* No ACK expected (multicast, etc.) */ + if (info->flags & IEEE80211_TX_CTL_NO_ACK) + cs->control |= ZD_CS_NO_ACK; /* PS-POLL */ - if (stype == IEEE80211_STYPE_PSPOLL) + if (ieee80211_is_pspoll(header->frame_control)) cs->control |= ZD_CS_PS_POLL_FRAME; - if (!is_multicast_ether_addr(header->addr1) && - ftype != IEEE80211_FTYPE_MGMT && - tx_length > zd_netdev_ieee80211(mac->netdev)->rts) - { - /* FIXME: check the logic */ - if (ZD_CS_TYPE(cs->modulation) == ZD_CS_OFDM) { - /* 802.11g */ - cs->control |= ZD_CS_SELF_CTS; - } else { /* 802.11b */ - cs->control |= ZD_CS_RTS; + 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); } - /* FIXME: Management frame? */ + 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 ieee80211_txb *txb, - int frag_num) + struct sk_buff *skb) { int r; - struct sk_buff *skb = txb->fragments[frag_num]; - struct ieee80211_hdr_4addr *hdr = - (struct ieee80211_hdr_4addr *) skb->data; - unsigned int frag_len = skb->len + IEEE80211_FCS_LEN; - unsigned int next_frag_len; + 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); - if (frag_num+1 < txb->nr_frags) { - next_frag_len = txb->fragments[frag_num+1]->len + - IEEE80211_FCS_LEN; - } else { - next_frag_len = 0; - } ZD_ASSERT(frag_len <= 0xffff); - ZD_ASSERT(next_frag_len <= 0xffff); - cs_set_modulation(mac, cs, hdr); + /* + * 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); + 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(mac->chip.is_zd1211b ? + cs->packet_length = cpu_to_le16(zd_chip_is_zd1211b(&mac->chip) ? packet_length - frag_len : packet_length); /* @@ -674,446 +914,625 @@ static int fill_ctrlset(struct zd_mac *mac, * - see line 53 of zdinlinef.h */ cs->service = 0; - r = zd_calc_tx_length_us(&cs->service, ZD_CS_RATE(cs->modulation), + 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); - - if (next_frag_len == 0) { - cs->next_frame_length = 0; - } else { - r = zd_calc_tx_length_us(NULL, ZD_CS_RATE(cs->modulation), - next_frag_len); - if (r < 0) - return r; - cs->next_frame_length = cpu_to_le16(r); - } + cs->next_frame_length = 0; return 0; } -static int zd_mac_tx(struct zd_mac *mac, struct ieee80211_txb *txb, int pri) +/** + * 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) { - int i, r; + struct zd_mac *mac = zd_hw_mac(hw); + struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); + int r; - for (i = 0; i < txb->nr_frags; i++) { - struct sk_buff *skb = txb->fragments[i]; + r = fill_ctrlset(mac, skb); + if (r) + goto fail; - r = fill_ctrlset(mac, txb, i); - if (r) - return r; - r = zd_usb_tx(&mac->chip.usb, skb->data, skb->len); - if (r) - return r; - } + info->rate_driver_data[0] = hw; - /* FIXME: shouldn't this be handled by the upper layers? */ - mac->netdev->trans_start = jiffies; + r = zd_usb_tx(&mac->chip.usb, skb); + if (r) + goto fail; + return; - ieee80211_txb_free(txb); - return 0; +fail: + dev_kfree_skb(skb); } -struct zd_rt_hdr { - struct ieee80211_radiotap_header rt_hdr; - u8 rt_flags; - u8 rt_rate; - u16 rt_channel; - u16 rt_chbitmask; -}; - -static void fill_rt_header(void *buffer, struct zd_mac *mac, - const struct ieee80211_rx_stats *stats, - const struct rx_status *status) +/** + * 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_rt_hdr *hdr = buffer; - - hdr->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION; - hdr->rt_hdr.it_pad = 0; - hdr->rt_hdr.it_len = cpu_to_le16(sizeof(struct zd_rt_hdr)); - hdr->rt_hdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) | - (1 << IEEE80211_RADIOTAP_CHANNEL) | - (1 << IEEE80211_RADIOTAP_RATE)); - - hdr->rt_flags = 0; - if (status->decryption_type & (ZD_RX_WEP64|ZD_RX_WEP128|ZD_RX_WEP256)) - hdr->rt_flags |= IEEE80211_RADIOTAP_F_WEP; - - hdr->rt_rate = stats->rate / 5; - - /* FIXME: 802.11a */ - hdr->rt_channel = cpu_to_le16(ieee80211chan2mhz( - _zd_chip_get_channel(&mac->chip))); - hdr->rt_chbitmask = cpu_to_le16(IEEE80211_CHAN_2GHZ | - ((status->frame_status & ZD_RX_FRAME_MODULATION_MASK) == - ZD_RX_OFDM ? IEEE80211_CHAN_OFDM : IEEE80211_CHAN_CCK)); + 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; } -/* Returns 1 if the data packet is for us and 0 otherwise. */ -static int is_data_packet_for_us(struct ieee80211_device *ieee, - struct ieee80211_hdr_4addr *hdr) +int zd_mac_rx(struct ieee80211_hw *hw, const u8 *buffer, unsigned int length) { - struct net_device *netdev = ieee->dev; - u16 fc = le16_to_cpu(hdr->frame_ctl); + 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; - ZD_ASSERT(WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA); + if (length < ZD_PLCP_HEADER_SIZE + 10 /* IEEE80211_1ADDR_LEN */ + + FCS_LEN + sizeof(struct rx_status)) + return -EINVAL; - switch (ieee->iw_mode) { - case IW_MODE_ADHOC: - if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) != 0 || - memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) != 0) - return 0; - break; - case IW_MODE_AUTO: - case IW_MODE_INFRA: - if ((fc & (IEEE80211_FCTL_TODS|IEEE80211_FCTL_FROMDS)) != - IEEE80211_FCTL_FROMDS || - memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) != 0) - return 0; + 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: - ZD_ASSERT(ieee->iw_mode != IW_MODE_MONITOR); - return 0; + return -EOPNOTSUPP; } - return memcmp(hdr->addr1, netdev->dev_addr, ETH_ALEN) == 0 || - is_multicast_ether_addr(hdr->addr1) || - (netdev->flags & IFF_PROMISC); + mac->vif = vif; + + return set_mac_and_bssid(mac); } -/* Filters receiving packets. If it returns 1 send it to ieee80211_rx, if 0 - * return. If an error is detected -EINVAL is returned. ieee80211_rx_mgt() is - * called here. - * - * It has been based on ieee80211_rx_any. - */ -static int filter_rx(struct ieee80211_device *ieee, - const u8 *buffer, unsigned int length, - struct ieee80211_rx_stats *stats) +static void zd_op_remove_interface(struct ieee80211_hw *hw, + struct ieee80211_vif *vif) { - struct ieee80211_hdr_4addr *hdr; - u16 fc; + 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); - if (ieee->iw_mode == IW_MODE_MONITOR) - return 1; + zd_mac_free_cur_beacon(mac); +} - hdr = (struct ieee80211_hdr_4addr *)buffer; - fc = le16_to_cpu(hdr->frame_ctl); - if ((fc & IEEE80211_FCTL_VERS) != 0) - return -EINVAL; +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; - switch (WLAN_FC_GET_TYPE(fc)) { - case IEEE80211_FTYPE_MGMT: - if (length < sizeof(struct ieee80211_hdr_3addr)) - return -EINVAL; - ieee80211_rx_mgt(ieee, hdr, stats); - return 0; - case IEEE80211_FTYPE_CTL: - /* Ignore invalid short buffers */ - return 0; - case IEEE80211_FTYPE_DATA: - if (length < sizeof(struct ieee80211_hdr_3addr)) - return -EINVAL; - return is_data_packet_for_us(ieee, hdr); - } + spin_lock_irq(&mac->lock); + mac->channel = conf->chandef.chan->hw_value; + spin_unlock_irq(&mac->lock); - return -EINVAL; + return zd_chip_set_channel(&mac->chip, conf->chandef.chan->hw_value); } -static void update_qual_rssi(struct zd_mac *mac, - const u8 *buffer, unsigned int length, - u8 qual_percent, u8 rssi_percent) +static void zd_beacon_done(struct zd_mac *mac) { - unsigned long flags; - struct ieee80211_hdr_3addr *hdr; - int i; + struct sk_buff *skb, *beacon; - hdr = (struct ieee80211_hdr_3addr *)buffer; - if (length < offsetof(struct ieee80211_hdr_3addr, addr3)) + if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags)) return; - if (memcmp(hdr->addr2, zd_mac_to_ieee80211(mac)->bssid, ETH_ALEN) != 0) + 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); - i = mac->stats_count % ZD_MAC_STATS_BUFFER_SIZE; - mac->qual_buffer[i] = qual_percent; - mac->rssi_buffer[i] = rssi_percent; - mac->stats_count++; + 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 int fill_rx_stats(struct ieee80211_rx_stats *stats, - const struct rx_status **pstatus, - struct zd_mac *mac, - const u8 *buffer, unsigned int length) + +static u64 zd_op_prepare_multicast(struct ieee80211_hw *hw, + struct netdev_hw_addr_list *mc_list) { - const struct rx_status *status; + struct zd_mac *mac = zd_hw_mac(hw); + struct zd_mc_hash hash; + struct netdev_hw_addr *ha; - *pstatus = status = zd_tail(buffer, length, sizeof(struct rx_status)); - if (status->frame_status & ZD_RX_ERROR) { - /* FIXME: update? */ - return -EINVAL; + 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); } - memset(stats, 0, sizeof(struct ieee80211_rx_stats)); - stats->len = length - (ZD_PLCP_HEADER_SIZE + IEEE80211_FCS_LEN + - + sizeof(struct rx_status)); - /* FIXME: 802.11a */ - stats->freq = IEEE80211_24GHZ_BAND; - stats->received_channel = _zd_chip_get_channel(&mac->chip); - stats->rssi = zd_rx_strength_percent(status->signal_strength); - stats->signal = zd_rx_qual_percent(buffer, - length - sizeof(struct rx_status), - status); - stats->mask = IEEE80211_STATMASK_RSSI | IEEE80211_STATMASK_SIGNAL; - stats->rate = zd_rx_rate(buffer, status); - if (stats->rate) - stats->mask |= IEEE80211_STATMASK_RATE; - return 0; + return hash.low | ((u64)hash.high << 32); } -int zd_mac_rx(struct zd_mac *mac, const u8 *buffer, unsigned int length) +#define SUPPORTED_FIF_FLAGS \ + (FIF_PROMISC_IN_BSS | 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; - struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac); - struct ieee80211_rx_stats stats; - const struct rx_status *status; - struct sk_buff *skb; - if (length < ZD_PLCP_HEADER_SIZE + IEEE80211_1ADDR_LEN + - IEEE80211_FCS_LEN + sizeof(struct rx_status)) - return -EINVAL; - - r = fill_rx_stats(&stats, &status, mac, buffer, length); - if (r) - return r; + /* Only deal with supported flags */ + changed_flags &= SUPPORTED_FIF_FLAGS; + *new_flags &= SUPPORTED_FIF_FLAGS; - length -= ZD_PLCP_HEADER_SIZE+IEEE80211_FCS_LEN+ - sizeof(struct rx_status); - buffer += ZD_PLCP_HEADER_SIZE; - - update_qual_rssi(mac, buffer, length, stats.signal, stats.rssi); + /* + * 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_PROMISC_IN_BSS | FIF_ALLMULTI)) + zd_mc_add_all(&hash); - r = filter_rx(ieee, buffer, length, &stats); - if (r <= 0) - return r; + 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); - skb = dev_alloc_skb(sizeof(struct zd_rt_hdr) + length); - if (!skb) - return -ENOMEM; - if (ieee->iw_mode == IW_MODE_MONITOR) - fill_rt_header(skb_put(skb, sizeof(struct zd_rt_hdr)), mac, - &stats, status); - memcpy(skb_put(skb, length), buffer, length); + zd_chip_set_multicast_hash(&mac->chip, &hash); - r = ieee80211_rx(ieee, skb, &stats); - if (!r) { - ZD_ASSERT(in_irq()); - dev_kfree_skb_irq(skb); + 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); } - return 0; + + /* 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 int netdev_tx(struct ieee80211_txb *txb, struct net_device *netdev, - int pri) +static void set_rts_cts(struct zd_mac *mac, unsigned int short_preamble) { - return zd_mac_tx(zd_netdev_mac(netdev), txb, pri); + mutex_lock(&mac->chip.mutex); + zd_chip_set_rts_cts_rate_locked(&mac->chip, short_preamble); + mutex_unlock(&mac->chip.mutex); } -static void set_security(struct net_device *netdev, - struct ieee80211_security *sec) +static void zd_op_bss_info_changed(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_bss_conf *bss_conf, + u32 changes) { - struct ieee80211_device *ieee = zd_netdev_ieee80211(netdev); - struct ieee80211_security *secinfo = &ieee->sec; - int keyidx; - - dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), "\n"); - - for (keyidx = 0; keyidx<WEP_KEYS; keyidx++) - if (sec->flags & (1<<keyidx)) { - secinfo->encode_alg[keyidx] = sec->encode_alg[keyidx]; - secinfo->key_sizes[keyidx] = sec->key_sizes[keyidx]; - memcpy(secinfo->keys[keyidx], sec->keys[keyidx], - SCM_KEY_LEN); + 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 (sec->flags & SEC_ACTIVE_KEY) { - secinfo->active_key = sec->active_key; - dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), - " .active_key = %d\n", sec->active_key); - } - if (sec->flags & SEC_UNICAST_GROUP) { - secinfo->unicast_uses_group = sec->unicast_uses_group; - dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), - " .unicast_uses_group = %d\n", - sec->unicast_uses_group); - } - if (sec->flags & SEC_LEVEL) { - secinfo->level = sec->level; - dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), - " .level = %d\n", sec->level); - } - if (sec->flags & SEC_ENABLED) { - secinfo->enabled = sec->enabled; - dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), - " .enabled = %d\n", sec->enabled); - } - if (sec->flags & SEC_ENCRYPT) { - secinfo->encrypt = sec->encrypt; - dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), - " .encrypt = %d\n", sec->encrypt); - } - if (sec->flags & SEC_AUTH_MODE) { - secinfo->auth_mode = sec->auth_mode; - dev_dbg_f(zd_mac_dev(zd_netdev_mac(netdev)), - " .auth_mode = %d\n", sec->auth_mode); + 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 void ieee_init(struct ieee80211_device *ieee) +static u64 zd_op_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif) { - ieee->mode = IEEE_B | IEEE_G; - ieee->freq_band = IEEE80211_24GHZ_BAND; - ieee->modulation = IEEE80211_OFDM_MODULATION | IEEE80211_CCK_MODULATION; - ieee->tx_headroom = sizeof(struct zd_ctrlset); - ieee->set_security = set_security; - ieee->hard_start_xmit = netdev_tx; - - /* Software encryption/decryption for now */ - ieee->host_build_iv = 0; - ieee->host_encrypt = 1; - ieee->host_decrypt = 1; - - /* FIXME: default to managed mode, until ieee80211 and zd1211rw can - * correctly support AUTO */ - ieee->iw_mode = IW_MODE_INFRA; + struct zd_mac *mac = zd_hw_mac(hw); + return zd_chip_get_tsf(&mac->chip); } -static void softmac_init(struct ieee80211softmac_device *sm) +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) { - sm->set_channel = set_channel; + 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; + + hw->flags = IEEE80211_HW_RX_INCLUDES_FCS | + IEEE80211_HW_SIGNAL_UNSPEC | + IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | + IEEE80211_HW_MFP_CAPABLE; + + 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; } -struct iw_statistics *zd_mac_get_wireless_stats(struct net_device *ndev) +#define BEACON_WATCHDOG_DELAY round_jiffies_relative(HZ) + +static void beacon_watchdog_handler(struct work_struct *work) { - struct zd_mac *mac = zd_netdev_mac(ndev); - struct iw_statistics *iw_stats = &mac->iw_stats; - unsigned int i, count, qual_total, rssi_total; + 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; - memset(iw_stats, 0, sizeof(struct iw_statistics)); - /* We are not setting the status, because ieee->state is not updated - * at all and this driver doesn't track authentication state. - */ spin_lock_irq(&mac->lock); - count = mac->stats_count < ZD_MAC_STATS_BUFFER_SIZE ? - mac->stats_count : ZD_MAC_STATS_BUFFER_SIZE; - qual_total = rssi_total = 0; - for (i = 0; i < count; i++) { - qual_total += mac->qual_buffer[i]; - rssi_total += mac->rssi_buffer[i]; - } + 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); - iw_stats->qual.updated = IW_QUAL_NOISE_INVALID; - if (count > 0) { - iw_stats->qual.qual = qual_total / count; - iw_stats->qual.level = rssi_total / count; - iw_stats->qual.updated |= - IW_QUAL_QUAL_UPDATED|IW_QUAL_LEVEL_UPDATED; - } else { - iw_stats->qual.updated |= - IW_QUAL_QUAL_INVALID|IW_QUAL_LEVEL_INVALID; - } - /* TODO: update counter */ - return iw_stats; -} -#ifdef DEBUG -static const char* decryption_types[] = { - [ZD_RX_NO_WEP] = "none", - [ZD_RX_WEP64] = "WEP64", - [ZD_RX_TKIP] = "TKIP", - [ZD_RX_AES] = "AES", - [ZD_RX_WEP128] = "WEP128", - [ZD_RX_WEP256] = "WEP256", -}; + 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); -static const char *decryption_type_string(u8 type) -{ - const char *s; + zd_chip_disable_hwint(&mac->chip); - if (type < ARRAY_SIZE(decryption_types)) { - s = decryption_types[type]; - } else { - s = NULL; + 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); } - return s ? s : "unknown"; + +rearm: + queue_delayed_work(zd_workqueue, &mac->beacon.watchdog_work, + BEACON_WATCHDOG_DELAY); } -static int is_ofdm(u8 frame_status) +static void beacon_init(struct zd_mac *mac) { - return (frame_status & ZD_RX_OFDM); + INIT_DELAYED_WORK(&mac->beacon.watchdog_work, beacon_watchdog_handler); } -void zd_dump_rx_status(const struct rx_status *status) +static void beacon_enable(struct zd_mac *mac) { - const char* modulation; - u8 quality; + dev_dbg_f(zd_mac_dev(mac), "\n"); - if (is_ofdm(status->frame_status)) { - modulation = "ofdm"; - quality = status->signal_quality_ofdm; - } else { - modulation = "cck"; - quality = status->signal_quality_cck; - } - pr_debug("rx status %s strength %#04x qual %#04x decryption %s\n", - modulation, status->signal_strength, quality, - decryption_type_string(status->decryption_type)); - if (status->frame_status & ZD_RX_ERROR) { - pr_debug("rx error %s%s%s%s%s%s\n", - (status->frame_status & ZD_RX_TIMEOUT_ERROR) ? - "timeout " : "", - (status->frame_status & ZD_RX_FIFO_OVERRUN_ERROR) ? - "fifo " : "", - (status->frame_status & ZD_RX_DECRYPTION_ERROR) ? - "decryption " : "", - (status->frame_status & ZD_RX_CRC32_ERROR) ? - "crc32 " : "", - (status->frame_status & ZD_RX_NO_ADDR1_MATCH_ERROR) ? - "addr1 " : "", - (status->frame_status & ZD_RX_CRC16_ERROR) ? - "crc16" : ""); - } + 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); } -#endif /* DEBUG */ #define LINK_LED_WORK_DELAY HZ -static void link_led_handler(void *p) +static void link_led_handler(struct work_struct *work) { - struct zd_mac *mac = p; + struct zd_mac *mac = + container_of(work, struct zd_mac, housekeeping.link_led_work.work); struct zd_chip *chip = &mac->chip; - struct ieee80211softmac_device *sm = ieee80211_priv(mac->netdev); int is_associated; int r; + if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags)) + goto requeue; + spin_lock_irq(&mac->lock); - is_associated = sm->associated != 0; + is_associated = mac->associated; spin_unlock_irq(&mac->lock); r = zd_chip_control_leds(chip, - is_associated ? LED_ASSOCIATED : LED_SCANNING); + is_associated ? ZD_LED_ASSOCIATED : ZD_LED_SCANNING); if (r) - dev_err(zd_mac_dev(mac), "zd_chip_control_leds error %d\n", 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_WORK(&mac->housekeeping.link_led_work, link_led_handler, mac); + INIT_DELAYED_WORK(&mac->housekeeping.link_led_work, link_led_handler); } static void housekeeping_enable(struct zd_mac *mac) @@ -1126,7 +1545,6 @@ static void housekeeping_enable(struct zd_mac *mac) static void housekeeping_disable(struct zd_mac *mac) { dev_dbg_f(zd_mac_dev(mac), "\n"); - cancel_rearming_delayed_workqueue(zd_workqueue, - &mac->housekeeping.link_led_work); - zd_chip_control_leds(&mac->chip, LED_OFF); + cancel_delayed_work_sync(&mac->housekeeping.link_led_work); + zd_chip_control_leds(&mac->chip, ZD_LED_OFF); } |