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1537 lines
40 KiB
1537 lines
40 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* ZD1211 USB-WLAN driver for Linux |
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* |
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* Copyright (C) 2005-2007 Ulrich Kunitz <[email protected]> |
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* Copyright (C) 2006-2007 Daniel Drake <[email protected]> |
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* Copyright (C) 2006-2007 Michael Wu <[email protected]> |
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* Copyright (C) 2007-2008 Luis R. Rodriguez <[email protected]> |
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*/ |
|
|
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#include <linux/netdevice.h> |
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#include <linux/etherdevice.h> |
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#include <linux/slab.h> |
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#include <linux/usb.h> |
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#include <linux/jiffies.h> |
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#include <net/ieee80211_radiotap.h> |
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|
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#include "zd_def.h" |
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#include "zd_chip.h" |
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#include "zd_mac.h" |
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#include "zd_rf.h" |
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|
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struct zd_reg_alpha2_map { |
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u32 reg; |
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char alpha2[2]; |
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}; |
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|
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static struct zd_reg_alpha2_map reg_alpha2_map[] = { |
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{ ZD_REGDOMAIN_FCC, "US" }, |
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{ ZD_REGDOMAIN_IC, "CA" }, |
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{ ZD_REGDOMAIN_ETSI, "DE" }, /* Generic ETSI, use most restrictive */ |
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{ ZD_REGDOMAIN_JAPAN, "JP" }, |
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{ ZD_REGDOMAIN_JAPAN_2, "JP" }, |
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{ ZD_REGDOMAIN_JAPAN_3, "JP" }, |
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{ ZD_REGDOMAIN_SPAIN, "ES" }, |
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{ ZD_REGDOMAIN_FRANCE, "FR" }, |
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}; |
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|
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/* This table contains the hardware specific values for the modulation rates. */ |
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static const struct ieee80211_rate zd_rates[] = { |
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{ .bitrate = 10, |
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.hw_value = ZD_CCK_RATE_1M, }, |
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{ .bitrate = 20, |
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.hw_value = ZD_CCK_RATE_2M, |
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.hw_value_short = ZD_CCK_RATE_2M | ZD_CCK_PREA_SHORT, |
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.flags = IEEE80211_RATE_SHORT_PREAMBLE }, |
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{ .bitrate = 55, |
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.hw_value = ZD_CCK_RATE_5_5M, |
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.hw_value_short = ZD_CCK_RATE_5_5M | ZD_CCK_PREA_SHORT, |
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.flags = IEEE80211_RATE_SHORT_PREAMBLE }, |
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{ .bitrate = 110, |
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.hw_value = ZD_CCK_RATE_11M, |
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.hw_value_short = ZD_CCK_RATE_11M | ZD_CCK_PREA_SHORT, |
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.flags = IEEE80211_RATE_SHORT_PREAMBLE }, |
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{ .bitrate = 60, |
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.hw_value = ZD_OFDM_RATE_6M, |
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.flags = 0 }, |
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{ .bitrate = 90, |
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.hw_value = ZD_OFDM_RATE_9M, |
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.flags = 0 }, |
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{ .bitrate = 120, |
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.hw_value = ZD_OFDM_RATE_12M, |
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.flags = 0 }, |
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{ .bitrate = 180, |
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.hw_value = ZD_OFDM_RATE_18M, |
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.flags = 0 }, |
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{ .bitrate = 240, |
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.hw_value = ZD_OFDM_RATE_24M, |
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.flags = 0 }, |
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{ .bitrate = 360, |
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.hw_value = ZD_OFDM_RATE_36M, |
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.flags = 0 }, |
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{ .bitrate = 480, |
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.hw_value = ZD_OFDM_RATE_48M, |
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.flags = 0 }, |
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{ .bitrate = 540, |
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.hw_value = ZD_OFDM_RATE_54M, |
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.flags = 0 }, |
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}; |
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|
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/* |
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* Zydas retry rates table. Each line is listed in the same order as |
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* in zd_rates[] and contains all the rate used when a packet is sent |
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* starting with a given rates. Let's consider an example : |
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* |
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* "11 Mbits : 4, 3, 2, 1, 0" means : |
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* - packet is sent using 4 different rates |
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* - 1st rate is index 3 (ie 11 Mbits) |
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* - 2nd rate is index 2 (ie 5.5 Mbits) |
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* - 3rd rate is index 1 (ie 2 Mbits) |
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* - 4th rate is index 0 (ie 1 Mbits) |
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*/ |
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|
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static const struct tx_retry_rate zd_retry_rates[] = { |
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{ /* 1 Mbits */ 1, { 0 }}, |
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{ /* 2 Mbits */ 2, { 1, 0 }}, |
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{ /* 5.5 Mbits */ 3, { 2, 1, 0 }}, |
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{ /* 11 Mbits */ 4, { 3, 2, 1, 0 }}, |
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{ /* 6 Mbits */ 5, { 4, 3, 2, 1, 0 }}, |
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{ /* 9 Mbits */ 6, { 5, 4, 3, 2, 1, 0}}, |
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{ /* 12 Mbits */ 5, { 6, 3, 2, 1, 0 }}, |
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{ /* 18 Mbits */ 6, { 7, 6, 3, 2, 1, 0 }}, |
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{ /* 24 Mbits */ 6, { 8, 6, 3, 2, 1, 0 }}, |
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{ /* 36 Mbits */ 7, { 9, 8, 6, 3, 2, 1, 0 }}, |
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{ /* 48 Mbits */ 8, {10, 9, 8, 6, 3, 2, 1, 0 }}, |
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{ /* 54 Mbits */ 9, {11, 10, 9, 8, 6, 3, 2, 1, 0 }} |
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}; |
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|
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static const struct ieee80211_channel zd_channels[] = { |
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{ .center_freq = 2412, .hw_value = 1 }, |
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{ .center_freq = 2417, .hw_value = 2 }, |
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{ .center_freq = 2422, .hw_value = 3 }, |
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{ .center_freq = 2427, .hw_value = 4 }, |
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{ .center_freq = 2432, .hw_value = 5 }, |
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{ .center_freq = 2437, .hw_value = 6 }, |
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{ .center_freq = 2442, .hw_value = 7 }, |
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{ .center_freq = 2447, .hw_value = 8 }, |
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{ .center_freq = 2452, .hw_value = 9 }, |
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{ .center_freq = 2457, .hw_value = 10 }, |
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{ .center_freq = 2462, .hw_value = 11 }, |
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{ .center_freq = 2467, .hw_value = 12 }, |
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{ .center_freq = 2472, .hw_value = 13 }, |
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{ .center_freq = 2484, .hw_value = 14 }, |
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}; |
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|
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static void housekeeping_init(struct zd_mac *mac); |
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static void housekeeping_enable(struct zd_mac *mac); |
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static void housekeeping_disable(struct zd_mac *mac); |
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static void beacon_init(struct zd_mac *mac); |
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static void beacon_enable(struct zd_mac *mac); |
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static void beacon_disable(struct zd_mac *mac); |
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static void set_rts_cts(struct zd_mac *mac, unsigned int short_preamble); |
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static int zd_mac_config_beacon(struct ieee80211_hw *hw, |
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struct sk_buff *beacon, bool in_intr); |
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|
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static int zd_reg2alpha2(u8 regdomain, char *alpha2) |
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{ |
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unsigned int i; |
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struct zd_reg_alpha2_map *reg_map; |
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for (i = 0; i < ARRAY_SIZE(reg_alpha2_map); i++) { |
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reg_map = ®_alpha2_map[i]; |
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if (regdomain == reg_map->reg) { |
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alpha2[0] = reg_map->alpha2[0]; |
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alpha2[1] = reg_map->alpha2[1]; |
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return 0; |
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} |
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} |
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return 1; |
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} |
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|
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static int zd_check_signal(struct ieee80211_hw *hw, int signal) |
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{ |
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struct zd_mac *mac = zd_hw_mac(hw); |
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|
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dev_dbg_f_cond(zd_mac_dev(mac), signal < 0 || signal > 100, |
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"%s: signal value from device not in range 0..100, " |
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"but %d.\n", __func__, signal); |
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|
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if (signal < 0) |
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signal = 0; |
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else if (signal > 100) |
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signal = 100; |
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|
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return signal; |
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} |
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|
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int zd_mac_preinit_hw(struct ieee80211_hw *hw) |
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{ |
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int r; |
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u8 addr[ETH_ALEN]; |
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struct zd_mac *mac = zd_hw_mac(hw); |
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|
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r = zd_chip_read_mac_addr_fw(&mac->chip, addr); |
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if (r) |
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return r; |
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|
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SET_IEEE80211_PERM_ADDR(hw, addr); |
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|
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return 0; |
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} |
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|
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int zd_mac_init_hw(struct ieee80211_hw *hw) |
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{ |
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int r; |
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struct zd_mac *mac = zd_hw_mac(hw); |
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struct zd_chip *chip = &mac->chip; |
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char alpha2[2]; |
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u8 default_regdomain; |
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|
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r = zd_chip_enable_int(chip); |
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if (r) |
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goto out; |
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r = zd_chip_init_hw(chip); |
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if (r) |
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goto disable_int; |
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|
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ZD_ASSERT(!irqs_disabled()); |
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|
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r = zd_read_regdomain(chip, &default_regdomain); |
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if (r) |
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goto disable_int; |
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spin_lock_irq(&mac->lock); |
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mac->regdomain = mac->default_regdomain = default_regdomain; |
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spin_unlock_irq(&mac->lock); |
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|
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/* We must inform the device that we are doing encryption/decryption in |
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* software at the moment. */ |
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r = zd_set_encryption_type(chip, ENC_SNIFFER); |
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if (r) |
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goto disable_int; |
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|
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r = zd_reg2alpha2(mac->regdomain, alpha2); |
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if (r) |
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goto disable_int; |
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|
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r = regulatory_hint(hw->wiphy, alpha2); |
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disable_int: |
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zd_chip_disable_int(chip); |
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out: |
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return r; |
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} |
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|
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void zd_mac_clear(struct zd_mac *mac) |
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{ |
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flush_workqueue(zd_workqueue); |
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zd_chip_clear(&mac->chip); |
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ZD_MEMCLEAR(mac, sizeof(struct zd_mac)); |
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} |
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static int set_rx_filter(struct zd_mac *mac) |
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{ |
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unsigned long flags; |
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u32 filter = STA_RX_FILTER; |
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|
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spin_lock_irqsave(&mac->lock, flags); |
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if (mac->pass_ctrl) |
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filter |= RX_FILTER_CTRL; |
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spin_unlock_irqrestore(&mac->lock, flags); |
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|
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return zd_iowrite32(&mac->chip, CR_RX_FILTER, filter); |
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} |
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static int set_mac_and_bssid(struct zd_mac *mac) |
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{ |
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int r; |
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if (!mac->vif) |
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return -1; |
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r = zd_write_mac_addr(&mac->chip, mac->vif->addr); |
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if (r) |
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return r; |
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|
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/* Vendor driver after setting MAC either sets BSSID for AP or |
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* filter for other modes. |
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*/ |
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if (mac->type != NL80211_IFTYPE_AP) |
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return set_rx_filter(mac); |
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else |
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return zd_write_bssid(&mac->chip, mac->vif->addr); |
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} |
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static int set_mc_hash(struct zd_mac *mac) |
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{ |
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struct zd_mc_hash hash; |
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zd_mc_clear(&hash); |
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return zd_chip_set_multicast_hash(&mac->chip, &hash); |
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} |
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int zd_op_start(struct ieee80211_hw *hw) |
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{ |
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struct zd_mac *mac = zd_hw_mac(hw); |
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struct zd_chip *chip = &mac->chip; |
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struct zd_usb *usb = &chip->usb; |
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int r; |
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|
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if (!usb->initialized) { |
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r = zd_usb_init_hw(usb); |
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if (r) |
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goto out; |
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} |
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r = zd_chip_enable_int(chip); |
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if (r < 0) |
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goto out; |
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r = zd_chip_set_basic_rates(chip, CR_RATES_80211B | CR_RATES_80211G); |
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if (r < 0) |
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goto disable_int; |
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r = set_rx_filter(mac); |
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if (r) |
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goto disable_int; |
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r = set_mc_hash(mac); |
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if (r) |
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goto disable_int; |
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/* Wait after setting the multicast hash table and powering on |
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* the radio otherwise interface bring up will fail. This matches |
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* what the vendor driver did. |
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*/ |
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msleep(10); |
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r = zd_chip_switch_radio_on(chip); |
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if (r < 0) { |
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dev_err(zd_chip_dev(chip), |
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"%s: failed to set radio on\n", __func__); |
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goto disable_int; |
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} |
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r = zd_chip_enable_rxtx(chip); |
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if (r < 0) |
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goto disable_radio; |
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r = zd_chip_enable_hwint(chip); |
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if (r < 0) |
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goto disable_rxtx; |
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housekeeping_enable(mac); |
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beacon_enable(mac); |
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set_bit(ZD_DEVICE_RUNNING, &mac->flags); |
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return 0; |
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disable_rxtx: |
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zd_chip_disable_rxtx(chip); |
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disable_radio: |
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zd_chip_switch_radio_off(chip); |
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disable_int: |
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zd_chip_disable_int(chip); |
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out: |
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return r; |
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} |
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void zd_op_stop(struct ieee80211_hw *hw) |
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{ |
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struct zd_mac *mac = zd_hw_mac(hw); |
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struct zd_chip *chip = &mac->chip; |
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struct sk_buff *skb; |
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struct sk_buff_head *ack_wait_queue = &mac->ack_wait_queue; |
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|
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clear_bit(ZD_DEVICE_RUNNING, &mac->flags); |
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|
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/* The order here deliberately is a little different from the open() |
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* method, since we need to make sure there is no opportunity for RX |
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* frames to be processed by mac80211 after we have stopped it. |
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*/ |
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|
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zd_chip_disable_rxtx(chip); |
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beacon_disable(mac); |
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housekeeping_disable(mac); |
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flush_workqueue(zd_workqueue); |
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|
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zd_chip_disable_hwint(chip); |
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zd_chip_switch_radio_off(chip); |
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zd_chip_disable_int(chip); |
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|
|
|
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while ((skb = skb_dequeue(ack_wait_queue))) |
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dev_kfree_skb_any(skb); |
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} |
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|
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int zd_restore_settings(struct zd_mac *mac) |
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{ |
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struct sk_buff *beacon; |
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struct zd_mc_hash multicast_hash; |
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unsigned int short_preamble; |
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int r, beacon_interval, beacon_period; |
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u8 channel; |
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|
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dev_dbg_f(zd_mac_dev(mac), "\n"); |
|
|
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spin_lock_irq(&mac->lock); |
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multicast_hash = mac->multicast_hash; |
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short_preamble = mac->short_preamble; |
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beacon_interval = mac->beacon.interval; |
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beacon_period = mac->beacon.period; |
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channel = mac->channel; |
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spin_unlock_irq(&mac->lock); |
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|
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r = set_mac_and_bssid(mac); |
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if (r < 0) { |
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dev_dbg_f(zd_mac_dev(mac), "set_mac_and_bssid failed, %d\n", r); |
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return r; |
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} |
|
|
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r = zd_chip_set_channel(&mac->chip, channel); |
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if (r < 0) { |
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dev_dbg_f(zd_mac_dev(mac), "zd_chip_set_channel failed, %d\n", |
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r); |
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return r; |
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} |
|
|
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set_rts_cts(mac, short_preamble); |
|
|
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r = zd_chip_set_multicast_hash(&mac->chip, &multicast_hash); |
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if (r < 0) { |
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dev_dbg_f(zd_mac_dev(mac), |
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"zd_chip_set_multicast_hash failed, %d\n", r); |
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return r; |
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} |
|
|
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if (mac->type == NL80211_IFTYPE_MESH_POINT || |
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mac->type == NL80211_IFTYPE_ADHOC || |
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mac->type == NL80211_IFTYPE_AP) { |
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if (mac->vif != NULL) { |
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beacon = ieee80211_beacon_get(mac->hw, mac->vif); |
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if (beacon) |
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zd_mac_config_beacon(mac->hw, beacon, false); |
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} |
|
|
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zd_set_beacon_interval(&mac->chip, beacon_interval, |
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beacon_period, mac->type); |
|
|
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spin_lock_irq(&mac->lock); |
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mac->beacon.last_update = jiffies; |
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spin_unlock_irq(&mac->lock); |
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} |
|
|
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return 0; |
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} |
|
|
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/** |
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* zd_mac_tx_status - reports tx status of a packet if required |
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* @hw: a &struct ieee80211_hw pointer |
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* @skb: a sk-buffer |
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* @ackssi: ACK signal strength |
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* @tx_status: success and/or retry |
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* |
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* This information calls ieee80211_tx_status_irqsafe() if required by the |
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* control information. It copies the control information into the status |
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* information. |
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* |
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* If no status information has been requested, the skb is freed. |
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*/ |
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static void zd_mac_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb, |
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int ackssi, struct tx_status *tx_status) |
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{ |
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struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
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int i; |
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int success = 1, retry = 1; |
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int first_idx; |
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const struct tx_retry_rate *retries; |
|
|
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ieee80211_tx_info_clear_status(info); |
|
|
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if (tx_status) { |
|
success = !tx_status->failure; |
|
retry = tx_status->retry + success; |
|
} |
|
|
|
if (success) { |
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/* success */ |
|
info->flags |= IEEE80211_TX_STAT_ACK; |
|
} else { |
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/* 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); |
|
|
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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++) { |
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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 |
|
* @urb: pointer to the urb structure |
|
* |
|
* 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; |
|
|
|
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_array(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 = 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 |
|
* |
|
* @hw: a &struct ieee80211_hw pointer |
|
* @control: the control structure |
|
* @skb: socket buffer |
|
* |
|
* 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 |
|
* @hw: a &struct ieee80211_hw pointer |
|
* @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 = NL80211_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 ? */ |
|
skb_put_data(skb, 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[NL80211_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); |
|
|
|
wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST); |
|
|
|
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); |
|
}
|
|
|