diff options
Diffstat (limited to 'package/rt2x00/src/rt2x00dev.c')
| -rw-r--r-- | package/rt2x00/src/rt2x00dev.c | 1202 |
1 files changed, 0 insertions, 1202 deletions
diff --git a/package/rt2x00/src/rt2x00dev.c b/package/rt2x00/src/rt2x00dev.c deleted file mode 100644 index ff399f8083..0000000000 --- a/package/rt2x00/src/rt2x00dev.c +++ /dev/null @@ -1,1202 +0,0 @@ -/* - Copyright (C) 2004 - 2007 rt2x00 SourceForge Project - <http://rt2x00.serialmonkey.com> - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the - Free Software Foundation, Inc., - 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - -/* - Module: rt2x00lib - Abstract: rt2x00 generic device routines. - */ - -/* - * Set enviroment defines for rt2x00.h - */ -#define DRV_NAME "rt2x00lib" - -#include <linux/kernel.h> -#include <linux/module.h> - -#include "rt2x00.h" -#include "rt2x00lib.h" - -/* - * Ring handler. - */ -struct data_ring *rt2x00lib_get_ring(struct rt2x00_dev *rt2x00dev, - const unsigned int queue) -{ - int beacon = test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags); - - /* - * Check if we are requesting a reqular TX ring, - * or if we are requesting a Beacon or Atim ring. - * For Atim rings, we should check if it is supported. - */ - if (queue < rt2x00dev->hw->queues && rt2x00dev->tx) - return &rt2x00dev->tx[queue]; - - if (!rt2x00dev->bcn || !beacon) - return NULL; - - if (queue == IEEE80211_TX_QUEUE_BEACON) - return &rt2x00dev->bcn[0]; - else if (queue == IEEE80211_TX_QUEUE_AFTER_BEACON) - return &rt2x00dev->bcn[1]; - - return NULL; -} -EXPORT_SYMBOL_GPL(rt2x00lib_get_ring); - -/* - * Link tuning handlers - */ -static void rt2x00lib_start_link_tuner(struct rt2x00_dev *rt2x00dev) -{ - rt2x00_clear_link(&rt2x00dev->link); - - /* - * Reset the link tuner. - */ - rt2x00dev->ops->lib->reset_tuner(rt2x00dev); - - queue_delayed_work(rt2x00dev->hw->workqueue, - &rt2x00dev->link.work, LINK_TUNE_INTERVAL); -} - -static void rt2x00lib_stop_link_tuner(struct rt2x00_dev *rt2x00dev) -{ - cancel_delayed_work_sync(&rt2x00dev->link.work); -} - -void rt2x00lib_reset_link_tuner(struct rt2x00_dev *rt2x00dev) -{ - if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) - return; - - rt2x00lib_stop_link_tuner(rt2x00dev); - rt2x00lib_start_link_tuner(rt2x00dev); -} - -/* - * Radio control handlers. - */ -int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev) -{ - int status; - - /* - * Don't enable the radio twice. - * And check if the hardware button has been disabled. - */ - if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) || - test_bit(DEVICE_DISABLED_RADIO_HW, &rt2x00dev->flags)) - return 0; - - /* - * Enable radio. - */ - status = rt2x00dev->ops->lib->set_device_state(rt2x00dev, - STATE_RADIO_ON); - if (status) - return status; - - __set_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags); - - /* - * Enable RX. - */ - rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON); - - /* - * Start the TX queues. - */ - ieee80211_start_queues(rt2x00dev->hw); - - return 0; -} - -void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev) -{ - if (!__test_and_clear_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) - return; - - /* - * Stop all scheduled work. - */ - if (work_pending(&rt2x00dev->beacon_work)) - cancel_work_sync(&rt2x00dev->beacon_work); - if (work_pending(&rt2x00dev->filter_work)) - cancel_work_sync(&rt2x00dev->filter_work); - if (work_pending(&rt2x00dev->config_work)) - cancel_work_sync(&rt2x00dev->config_work); - - /* - * Stop the TX queues. - */ - ieee80211_stop_queues(rt2x00dev->hw); - - /* - * Disable RX. - */ - rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF); - - /* - * Disable radio. - */ - rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF); -} - -void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state) -{ - /* - * When we are disabling the RX, we should also stop the link tuner. - */ - if (state == STATE_RADIO_RX_OFF) - rt2x00lib_stop_link_tuner(rt2x00dev); - - rt2x00dev->ops->lib->set_device_state(rt2x00dev, state); - - /* - * When we are enabling the RX, we should also start the link tuner. - */ - if (state == STATE_RADIO_RX_ON && - is_interface_present(&rt2x00dev->interface)) - rt2x00lib_start_link_tuner(rt2x00dev); -} - -static void rt2x00lib_precalculate_link_signal(struct link *link) -{ - if (link->rx_failed || link->rx_success) - link->rx_percentage = - (link->rx_success * 100) / - (link->rx_failed + link->rx_success); - else - link->rx_percentage = 50; - - if (link->tx_failed || link->tx_success) - link->tx_percentage = - (link->tx_success * 100) / - (link->tx_failed + link->tx_success); - else - link->tx_percentage = 50; - - link->rx_success = 0; - link->rx_failed = 0; - link->tx_success = 0; - link->tx_failed = 0; -} - -static int rt2x00lib_calculate_link_signal(struct rt2x00_dev *rt2x00dev, - int rssi) -{ - int rssi_percentage = 0; - int signal; - - /* - * We need a positive value for the RSSI. - */ - if (rssi < 0) - rssi += rt2x00dev->rssi_offset; - - /* - * Calculate the different percentages, - * which will be used for the signal. - */ - if (rt2x00dev->rssi_offset) - rssi_percentage = (rssi * 100) / rt2x00dev->rssi_offset; - - /* - * Add the individual percentages and use the WEIGHT - * defines to calculate the current link signal. - */ - signal = ((WEIGHT_RSSI * rssi_percentage) + - (WEIGHT_TX * rt2x00dev->link.tx_percentage) + - (WEIGHT_RX * rt2x00dev->link.rx_percentage)) / 100; - - return (signal > 100) ? 100 : signal; -} - -static void rt2x00lib_link_tuner(struct work_struct *work) -{ - struct rt2x00_dev *rt2x00dev = - container_of(work, struct rt2x00_dev, link.work.work); - - /* - * When the radio is shutting down we should - * immediately cease all link tuning. - */ - if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) - return; - - /* - * Update statistics. - */ - rt2x00dev->ops->lib->link_stats(rt2x00dev); - - rt2x00dev->low_level_stats.dot11FCSErrorCount += - rt2x00dev->link.rx_failed; - - /* - * Only perform the link tuning when Link tuning - * has been enabled (This could have been disabled from the EEPROM). - */ - if (!test_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags)) - rt2x00dev->ops->lib->link_tuner(rt2x00dev); - - /* - * Precalculate a portion of the link signal which is - * in based on the tx/rx success/failure counters. - */ - rt2x00lib_precalculate_link_signal(&rt2x00dev->link); - - /* - * Increase tuner counter, and reschedule the next link tuner run. - */ - rt2x00dev->link.count++; - queue_delayed_work(rt2x00dev->hw->workqueue, &rt2x00dev->link.work, - LINK_TUNE_INTERVAL); -} - -static void rt2x00lib_packetfilter_scheduled(struct work_struct *work) -{ - struct rt2x00_dev *rt2x00dev = - container_of(work, struct rt2x00_dev, filter_work); - unsigned int filter = rt2x00dev->interface.filter; - - /* - * Since we had stored the filter inside interface.filter, - * we should now clear that field. Otherwise the driver will - * assume nothing has changed (*total_flags will be compared - * to interface.filter to determine if any action is required). - */ - rt2x00dev->interface.filter = 0; - - rt2x00dev->ops->hw->configure_filter(rt2x00dev->hw, - filter, &filter, 0, NULL); -} - -static void rt2x00lib_configuration_scheduled(struct work_struct *work) -{ - struct rt2x00_dev *rt2x00dev = - container_of(work, struct rt2x00_dev, config_work); - int preamble = !test_bit(CONFIG_SHORT_PREAMBLE, &rt2x00dev->flags); - - rt2x00mac_erp_ie_changed(rt2x00dev->hw, - IEEE80211_ERP_CHANGE_PREAMBLE, 0, preamble); -} - -/* - * Interrupt context handlers. - */ -static void rt2x00lib_beacondone_scheduled(struct work_struct *work) -{ - struct rt2x00_dev *rt2x00dev = - container_of(work, struct rt2x00_dev, beacon_work); - struct data_ring *ring = - rt2x00lib_get_ring(rt2x00dev, IEEE80211_TX_QUEUE_BEACON); - struct data_entry *entry = rt2x00_get_data_entry(ring); - struct sk_buff *skb; - - skb = ieee80211_beacon_get(rt2x00dev->hw, - rt2x00dev->interface.id, - &entry->tx_status.control); - if (!skb) - return; - - rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw, skb, - &entry->tx_status.control); - - dev_kfree_skb(skb); -} - -void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev) -{ - if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags)) - return; - - queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->beacon_work); -} -EXPORT_SYMBOL_GPL(rt2x00lib_beacondone); - -void rt2x00lib_txdone(struct data_entry *entry, - const int status, const int retry) -{ - struct rt2x00_dev *rt2x00dev = entry->ring->rt2x00dev; - struct ieee80211_tx_status *tx_status = &entry->tx_status; - struct ieee80211_low_level_stats *stats = &rt2x00dev->low_level_stats; - int success = !!(status == TX_SUCCESS || status == TX_SUCCESS_RETRY); - int fail = !!(status == TX_FAIL_RETRY || status == TX_FAIL_INVALID || - status == TX_FAIL_OTHER); - - /* - * Update TX statistics. - */ - tx_status->flags = 0; - tx_status->ack_signal = 0; - tx_status->excessive_retries = (status == TX_FAIL_RETRY); - tx_status->retry_count = retry; - rt2x00dev->link.tx_success += success; - rt2x00dev->link.tx_failed += retry + fail; - - if (!(tx_status->control.flags & IEEE80211_TXCTL_NO_ACK)) { - if (success) - tx_status->flags |= IEEE80211_TX_STATUS_ACK; - else - stats->dot11ACKFailureCount++; - } - - tx_status->queue_length = entry->ring->stats.limit; - tx_status->queue_number = tx_status->control.queue; - - if (tx_status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) { - if (success) - stats->dot11RTSSuccessCount++; - else - stats->dot11RTSFailureCount++; - } - - /* - * Send the tx_status to mac80211, - * that method also cleans up the skb structure. - */ - ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb, tx_status); - entry->skb = NULL; -} -EXPORT_SYMBOL_GPL(rt2x00lib_txdone); - -void rt2x00lib_rxdone(struct data_entry *entry, struct sk_buff *skb, - struct rxdata_entry_desc *desc) -{ - struct rt2x00_dev *rt2x00dev = entry->ring->rt2x00dev; - struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status; - struct ieee80211_hw_mode *mode; - struct ieee80211_rate *rate; - unsigned int i; - int val = 0; - - /* - * Update RX statistics. - */ - mode = &rt2x00dev->hwmodes[rt2x00dev->curr_hwmode]; - for (i = 0; i < mode->num_rates; i++) { - rate = &mode->rates[i]; - - /* - * When frame was received with an OFDM bitrate, - * the signal is the PLCP value. If it was received with - * a CCK bitrate the signal is the rate in 0.5kbit/s. - */ - if (!desc->ofdm) - val = DEVICE_GET_RATE_FIELD(rate->val, RATE); - else - val = DEVICE_GET_RATE_FIELD(rate->val, PLCP); - - if (val == desc->signal) { - val = rate->val; - break; - } - } - - rt2x00_update_link_rssi(&rt2x00dev->link, desc->rssi); - rt2x00dev->link.rx_success++; - rx_status->rate = val; - rx_status->signal = - rt2x00lib_calculate_link_signal(rt2x00dev, desc->rssi); - rx_status->ssi = desc->rssi; - rx_status->flag = desc->flags; - - /* - * Send frame to mac80211 - */ - ieee80211_rx_irqsafe(rt2x00dev->hw, skb, rx_status); -} -EXPORT_SYMBOL_GPL(rt2x00lib_rxdone); - -/* - * TX descriptor initializer - */ -void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev, - struct data_desc *txd, - struct ieee80211_hdr *ieee80211hdr, - unsigned int length, - struct ieee80211_tx_control *control) -{ - struct txdata_entry_desc desc; - struct data_ring *ring; - int tx_rate; - int bitrate; - int duration; - int residual; - u16 frame_control; - u16 seq_ctrl; - - /* - * Make sure the descriptor is properly cleared. - */ - memset(&desc, 0x00, sizeof(desc)); - - /* - * Get ring pointer, if we fail to obtain the - * correct ring, then use the first TX ring. - */ - ring = rt2x00lib_get_ring(rt2x00dev, control->queue); - if (!ring) - ring = rt2x00lib_get_ring(rt2x00dev, IEEE80211_TX_QUEUE_DATA0); - - desc.cw_min = ring->tx_params.cw_min; - desc.cw_max = ring->tx_params.cw_max; - desc.aifs = ring->tx_params.aifs; - - /* - * Identify queue - */ - if (control->queue < rt2x00dev->hw->queues) - desc.queue = control->queue; - else if (control->queue == IEEE80211_TX_QUEUE_BEACON || - control->queue == IEEE80211_TX_QUEUE_AFTER_BEACON) - desc.queue = QUEUE_MGMT; - else - desc.queue = QUEUE_OTHER; - - /* - * Read required fields from ieee80211 header. - */ - frame_control = le16_to_cpu(ieee80211hdr->frame_control); - seq_ctrl = le16_to_cpu(ieee80211hdr->seq_ctrl); - - tx_rate = control->tx_rate; - - /* - * Check if this is a RTS/CTS frame - */ - if (is_rts_frame(frame_control) || is_cts_frame(frame_control)) { - __set_bit(ENTRY_TXD_BURST, &desc.flags); - if (is_rts_frame(frame_control)) - __set_bit(ENTRY_TXD_RTS_FRAME, &desc.flags); - if (control->rts_cts_rate) - tx_rate = control->rts_cts_rate; - } - - /* - * Check for OFDM - */ - if (DEVICE_GET_RATE_FIELD(tx_rate, RATEMASK) & DEV_OFDM_RATEMASK) - __set_bit(ENTRY_TXD_OFDM_RATE, &desc.flags); - - /* - * Check if more fragments are pending - */ - if (ieee80211_get_morefrag(ieee80211hdr)) { - __set_bit(ENTRY_TXD_BURST, &desc.flags); - __set_bit(ENTRY_TXD_MORE_FRAG, &desc.flags); - } - - /* - * Beacons and probe responses require the tsf timestamp - * to be inserted into the frame. - */ - if (control->queue == IEEE80211_TX_QUEUE_BEACON || - is_probe_resp(frame_control)) - __set_bit(ENTRY_TXD_REQ_TIMESTAMP, &desc.flags); - - /* - * Determine with what IFS priority this frame should be send. - * Set ifs to IFS_SIFS when the this is not the first fragment, - * or this fragment came after RTS/CTS. - */ - if ((seq_ctrl & IEEE80211_SCTL_FRAG) > 0 || - test_bit(ENTRY_TXD_RTS_FRAME, &desc.flags)) - desc.ifs = IFS_SIFS; - else - desc.ifs = IFS_BACKOFF; - - /* - * PLCP setup - * Length calculation depends on OFDM/CCK rate. - */ - desc.signal = DEVICE_GET_RATE_FIELD(tx_rate, PLCP); - desc.service = 0x04; - - if (test_bit(ENTRY_TXD_OFDM_RATE, &desc.flags)) { - desc.length_high = ((length + FCS_LEN) >> 6) & 0x3f; - desc.length_low = ((length + FCS_LEN) & 0x3f); - } else { - bitrate = DEVICE_GET_RATE_FIELD(tx_rate, RATE); - - /* - * Convert length to microseconds. - */ - residual = get_duration_res(length + FCS_LEN, bitrate); - duration = get_duration(length + FCS_LEN, bitrate); - - if (residual != 0) { - duration++; - - /* - * Check if we need to set the Length Extension - */ - if (bitrate == 110 && residual <= 30) - desc.service |= 0x80; - } - - desc.length_high = (duration >> 8) & 0xff; - desc.length_low = duration & 0xff; - - /* - * When preamble is enabled we should set the - * preamble bit for the signal. - */ - if (DEVICE_GET_RATE_FIELD(tx_rate, PREAMBLE)) - desc.signal |= 0x08; - } - - rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, txd, &desc, - ieee80211hdr, length, control); -} -EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc); - -/* - * Driver initialization handlers. - */ -static void rt2x00lib_channel(struct ieee80211_channel *entry, - const int channel, const int tx_power, - const int value) -{ - entry->chan = channel; - if (channel <= 14) - entry->freq = 2407 + (5 * channel); - else - entry->freq = 5000 + (5 * channel); - entry->val = value; - entry->flag = - IEEE80211_CHAN_W_IBSS | - IEEE80211_CHAN_W_ACTIVE_SCAN | - IEEE80211_CHAN_W_SCAN; - entry->power_level = tx_power; - entry->antenna_max = 0xff; -} - -static void rt2x00lib_rate(struct ieee80211_rate *entry, - const int rate, const int mask, - const int plcp, const int flags) -{ - entry->rate = rate; - entry->val = - DEVICE_SET_RATE_FIELD(rate, RATE) | - DEVICE_SET_RATE_FIELD(mask, RATEMASK) | - DEVICE_SET_RATE_FIELD(plcp, PLCP); - entry->flags = flags; - entry->val2 = entry->val; - if (entry->flags & IEEE80211_RATE_PREAMBLE2) - entry->val2 |= DEVICE_SET_RATE_FIELD(1, PREAMBLE); - entry->min_rssi_ack = 0; - entry->min_rssi_ack_delta = 0; -} - -static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev, - struct hw_mode_spec *spec) -{ - struct ieee80211_hw *hw = rt2x00dev->hw; - struct ieee80211_hw_mode *hwmodes; - struct ieee80211_channel *channels; - struct ieee80211_rate *rates; - unsigned int i; - unsigned char tx_power; - - hwmodes = kzalloc(sizeof(*hwmodes) * spec->num_modes, GFP_KERNEL); - if (!hwmodes) - goto exit; - - channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL); - if (!channels) - goto exit_free_modes; - - rates = kzalloc(sizeof(*rates) * spec->num_rates, GFP_KERNEL); - if (!rates) - goto exit_free_channels; - - /* - * Initialize Rate list. - */ - rt2x00lib_rate(&rates[0], 10, DEV_RATEMASK_1MB, - 0x00, IEEE80211_RATE_CCK); - rt2x00lib_rate(&rates[1], 20, DEV_RATEMASK_2MB, - 0x01, IEEE80211_RATE_CCK_2); - rt2x00lib_rate(&rates[2], 55, DEV_RATEMASK_5_5MB, - 0x02, IEEE80211_RATE_CCK_2); - rt2x00lib_rate(&rates[3], 110, DEV_RATEMASK_11MB, - 0x03, IEEE80211_RATE_CCK_2); - - if (spec->num_rates > 4) { - rt2x00lib_rate(&rates[4], 60, DEV_RATEMASK_6MB, - 0x0b, IEEE80211_RATE_OFDM); - rt2x00lib_rate(&rates[5], 90, DEV_RATEMASK_9MB, - 0x0f, IEEE80211_RATE_OFDM); - rt2x00lib_rate(&rates[6], 120, DEV_RATEMASK_12MB, - 0x0a, IEEE80211_RATE_OFDM); - rt2x00lib_rate(&rates[7], 180, DEV_RATEMASK_18MB, - 0x0e, IEEE80211_RATE_OFDM); - rt2x00lib_rate(&rates[8], 240, DEV_RATEMASK_24MB, - 0x09, IEEE80211_RATE_OFDM); - rt2x00lib_rate(&rates[9], 360, DEV_RATEMASK_36MB, - 0x0d, IEEE80211_RATE_OFDM); - rt2x00lib_rate(&rates[10], 480, DEV_RATEMASK_48MB, - 0x08, IEEE80211_RATE_OFDM); - rt2x00lib_rate(&rates[11], 540, DEV_RATEMASK_54MB, - 0x0c, IEEE80211_RATE_OFDM); - } - - /* - * Initialize Channel list. - */ - for (i = 0; i < spec->num_channels; i++) { - if (spec->channels[i].channel <= 14) - tx_power = spec->tx_power_bg[i]; - else if (spec->tx_power_a) - tx_power = spec->tx_power_a[i]; - else - tx_power = spec->tx_power_default; - - rt2x00lib_channel(&channels[i], - spec->channels[i].channel, tx_power, i); - } - - /* - * Intitialize 802.11b - * Rates: CCK. - * Channels: OFDM. - */ - if (spec->num_modes > HWMODE_B) { - hwmodes[HWMODE_B].mode = MODE_IEEE80211B; - hwmodes[HWMODE_B].num_channels = 14; - hwmodes[HWMODE_B].num_rates = 4; - hwmodes[HWMODE_B].channels = channels; - hwmodes[HWMODE_B].rates = rates; - } - - /* - * Intitialize 802.11g - * Rates: CCK, OFDM. - * Channels: OFDM. - */ - if (spec->num_modes > HWMODE_G) { - hwmodes[HWMODE_G].mode = MODE_IEEE80211G; - hwmodes[HWMODE_G].num_channels = 14; - hwmodes[HWMODE_G].num_rates = spec->num_rates; - hwmodes[HWMODE_G].channels = channels; - hwmodes[HWMODE_G].rates = rates; - } - - /* - * Intitialize 802.11a - * Rates: OFDM. - * Channels: OFDM, UNII, HiperLAN2. - */ - if (spec->num_modes > HWMODE_A) { - hwmodes[HWMODE_A].mode = MODE_IEEE80211A; - hwmodes[HWMODE_A].num_channels = spec->num_channels - 14; - hwmodes[HWMODE_A].num_rates = spec->num_rates - 4; - hwmodes[HWMODE_A].channels = &channels[14]; - hwmodes[HWMODE_A].rates = &rates[4]; - } - - if (spec->num_modes > HWMODE_G && - ieee80211_register_hwmode(hw, &hwmodes[HWMODE_G])) - goto exit_free_rates; - - if (spec->num_modes > HWMODE_B && - ieee80211_register_hwmode(hw, &hwmodes[HWMODE_B])) - goto exit_free_rates; - - if (spec->num_modes > HWMODE_A && - ieee80211_register_hwmode(hw, &hwmodes[HWMODE_A])) - goto exit_free_rates; - - rt2x00dev->hwmodes = hwmodes; - - return 0; - -exit_free_rates: - kfree(rates); - -exit_free_channels: - kfree(channels); - -exit_free_modes: - kfree(hwmodes); - -exit: - ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n"); - return -ENOMEM; -} - -static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev) -{ - if (test_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags)) - ieee80211_unregister_hw(rt2x00dev->hw); - - if (likely(rt2x00dev->hwmodes)) { - kfree(rt2x00dev->hwmodes->channels); - kfree(rt2x00dev->hwmodes->rates); - kfree(rt2x00dev->hwmodes); - rt2x00dev->hwmodes = NULL; - } -} - -static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev) -{ - struct hw_mode_spec *spec = &rt2x00dev->spec; - int status; - - /* - * Initialize HW modes. - */ - status = rt2x00lib_probe_hw_modes(rt2x00dev, spec); - if (status) - return status; - - /* - * Register HW. - */ - status = ieee80211_register_hw(rt2x00dev->hw); - if (status) { - rt2x00lib_remove_hw(rt2x00dev); - return status; - } - - __set_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags); - - return 0; -} - -/* - * Initialization/uninitialization handlers. - */ -static int rt2x00lib_alloc_entries(struct data_ring *ring, - const u16 max_entries, const u16 data_size, - const u16 desc_size) -{ - struct data_entry *entry; - unsigned int i; - - ring->stats.limit = max_entries; - ring->data_size = data_size; - ring->desc_size = desc_size; - - /* - * Allocate all ring entries. - */ - entry = kzalloc(ring->stats.limit * sizeof(*entry), GFP_KERNEL); - if (!entry) - return -ENOMEM; - - for (i = 0; i < ring->stats.limit; i++) { - entry[i].flags = 0; - entry[i].ring = ring; - entry[i].skb = NULL; - } - - ring->entry = entry; - - return 0; -} - -static int rt2x00lib_alloc_ring_entries(struct rt2x00_dev *rt2x00dev) -{ - struct data_ring *ring; - - /* - * Allocate the RX ring. - */ - if (rt2x00lib_alloc_entries(rt2x00dev->rx, RX_ENTRIES, DATA_FRAME_SIZE, - rt2x00dev->ops->rxd_size)) - return -ENOMEM; - - /* - * First allocate the TX rings. - */ - txring_for_each(rt2x00dev, ring) { - if (rt2x00lib_alloc_entries(ring, TX_ENTRIES, DATA_FRAME_SIZE, - rt2x00dev->ops->txd_size)) - return -ENOMEM; - } - - if (!test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags)) - return 0; - - /* - * Allocate the BEACON ring. - */ - if (rt2x00lib_alloc_entries(&rt2x00dev->bcn[0], BEACON_ENTRIES, - MGMT_FRAME_SIZE, rt2x00dev->ops->txd_size)) - return -ENOMEM; - - /* - * Allocate the Atim ring. - */ - if (rt2x00lib_alloc_entries(&rt2x00dev->bcn[1], ATIM_ENTRIES, - DATA_FRAME_SIZE, rt2x00dev->ops->txd_size)) - return -ENOMEM; - - return 0; -} - -static void rt2x00lib_free_ring_entries(struct rt2x00_dev *rt2x00dev) -{ - struct data_ring *ring; - - ring_for_each(rt2x00dev, ring) { - kfree(ring->entry); - ring->entry = NULL; - } -} - -void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev) -{ - if (!__test_and_clear_bit(DEVICE_INITIALIZED, &rt2x00dev->flags)) - return; - - /* - * Unregister rfkill. - */ - rt2x00rfkill_unregister(rt2x00dev); - - /* - * Allow the HW to uninitialize. - */ - rt2x00dev->ops->lib->uninitialize(rt2x00dev); - - /* - * Free allocated ring entries. - */ - rt2x00lib_free_ring_entries(rt2x00dev); -} - -int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev) -{ - int status; - - if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags)) - return 0; - - /* - * Allocate all ring entries. - */ - status = rt2x00lib_alloc_ring_entries(rt2x00dev); - if (status) { - ERROR(rt2x00dev, "Ring entries allocation failed.\n"); - return status; - } - - /* - * Initialize the device. - */ - status = rt2x00dev->ops->lib->initialize(rt2x00dev); - if (status) - goto exit; - - __set_bit(DEVICE_INITIALIZED, &rt2x00dev->flags); - - /* - * Register the rfkill handler. - */ - status = rt2x00rfkill_register(rt2x00dev); - if (status) - goto exit_unitialize; - - return 0; - -exit_unitialize: - rt2x00lib_uninitialize(rt2x00dev); - -exit: - rt2x00lib_free_ring_entries(rt2x00dev); - - return status; -} - -/* - * driver allocation handlers. - */ -static int rt2x00lib_alloc_rings(struct rt2x00_dev *rt2x00dev) -{ - struct data_ring *ring; - - /* - * We need the following rings: - * RX: 1 - * TX: hw->queues - * Beacon: 1 (if required) - * Atim: 1 (if required) - */ - rt2x00dev->data_rings = 1 + rt2x00dev->hw->queues + - (2 * test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags)); - - ring = kzalloc(rt2x00dev->data_rings * sizeof(*ring), GFP_KERNEL); - if (!ring) { - ERROR(rt2x00dev, "Ring allocation failed.\n"); - return -ENOMEM; - } - - /* - * Initialize pointers - */ - rt2x00dev->rx = ring; - rt2x00dev->tx = &rt2x00dev->rx[1]; - if (test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags)) - rt2x00dev->bcn = &rt2x00dev->tx[rt2x00dev->hw->queues]; - - /* - * Initialize ring parameters. - * cw_min: 2^5 = 32. - * cw_max: 2^10 = 1024. - */ - ring_for_each(rt2x00dev, ring) { - ring->rt2x00dev = rt2x00dev; - ring->tx_params.aifs = 2; - ring->tx_params.cw_min = 5; - ring->tx_params.cw_max = 10; - } - - return 0; -} - -static void rt2x00lib_free_rings(struct rt2x00_dev *rt2x00dev) -{ - kfree(rt2x00dev->rx); - rt2x00dev->rx = NULL; - rt2x00dev->tx = NULL; - rt2x00dev->bcn = NULL; -} - -int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev) -{ - int retval = -ENOMEM; - - /* - * Let the driver probe the device to detect the capabilities. - */ - retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev); - if (retval) { - ERROR(rt2x00dev, "Failed to allocate device.\n"); - goto exit; - } - - /* - * Initialize configuration work. - */ - INIT_WORK(&rt2x00dev->beacon_work, rt2x00lib_beacondone_scheduled); - INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled); - INIT_WORK(&rt2x00dev->config_work, rt2x00lib_configuration_scheduled); - INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner); - - /* - * Reset current working type. - */ - rt2x00dev->interface.type = INVALID_INTERFACE; - - /* - * Allocate ring array. - */ - retval = rt2x00lib_alloc_rings(rt2x00dev); - if (retval) - goto exit; - - /* - * Initialize ieee80211 structure. - */ - retval = rt2x00lib_probe_hw(rt2x00dev); - if (retval) { - ERROR(rt2x00dev, "Failed to initialize hw.\n"); - goto exit; - } - - /* - * Allocatie rfkill. - */ - retval = rt2x00rfkill_allocate(rt2x00dev); - if (retval) - goto exit; - - /* - * Open the debugfs entry. - */ - rt2x00debug_register(rt2x00dev); - - __set_bit(DEVICE_PRESENT, &rt2x00dev->flags); - - return 0; - -exit: - rt2x00lib_remove_dev(rt2x00dev); - - return retval; -} -EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev); - -void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev) -{ - __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags); - - /* - * Disable radio. - */ - rt2x00lib_disable_radio(rt2x00dev); - - /* - * Uninitialize device. - */ - rt2x00lib_uninitialize(rt2x00dev); - - /* - * Close debugfs entry. - */ - rt2x00debug_deregister(rt2x00dev); - - /* - * Free rfkill - */ - rt2x00rfkill_free(rt2x00dev); - - /* - * Free ieee80211_hw memory. - */ - rt2x00lib_remove_hw(rt2x00dev); - - /* - * Free firmware image. - */ - rt2x00lib_free_firmware(rt2x00dev); - - /* - * Free ring structures. - */ - rt2x00lib_free_rings(rt2x00dev); -} -EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev); - -/* - * Device state handlers - */ -#ifdef CONFIG_PM -int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state) -{ - int retval; - - NOTICE(rt2x00dev, "Going to sleep.\n"); - __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags); - - /* - * Only continue if mac80211 has open interfaces. - */ - if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags)) - goto exit; - __set_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags); - - /* - * Disable radio and unitialize all items - * that must be recreated on resume. - */ - rt2x00mac_stop(rt2x00dev->hw); - rt2x00lib_uninitialize(rt2x00dev); - rt2x00debug_deregister(rt2x00dev); - -exit: - /* - * Set device mode to sleep for power management. - */ - retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP); - if (retval) - return retval; - - return 0; -} -EXPORT_SYMBOL_GPL(rt2x00lib_suspend); - -int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev) -{ - struct interface *intf = &rt2x00dev->interface; - int retval; - - NOTICE(rt2x00dev, "Waking up.\n"); - __set_bit(DEVICE_PRESENT, &rt2x00dev->flags); - - /* - * Open the debugfs entry. - */ - rt2x00debug_register(rt2x00dev); - - /* - * Only continue if mac80211 had open interfaces. - */ - if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags)) - return 0; - - /* - * Reinitialize device and all active interfaces. - */ - retval = rt2x00mac_start(rt2x00dev->hw); - if (retval) - goto exit; - - /* - * Reconfigure device. - */ - rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf, 1); - if (!rt2x00dev->hw->conf.radio_enabled) - rt2x00lib_disable_radio(rt2x00dev); - - rt2x00lib_config_mac_addr(rt2x00dev, intf->mac); - rt2x00lib_config_bssid(rt2x00dev, intf->bssid); - rt2x00lib_config_type(rt2x00dev, intf->type); - - /* - * It is possible that during that mac80211 has attempted - * to send frames while we were suspending or resuming. - * In that case we have disabled the TX queue and should - * now enable it again - */ - ieee80211_start_queues(rt2x00dev->hw); - - /* - * When in Master or Ad-hoc mode, - * restart Beacon transmitting by faking a beacondone event. - */ - if (intf->type == IEEE80211_IF_TYPE_AP || - intf->type == IEEE80211_IF_TYPE_IBSS) - rt2x00lib_beacondone(rt2x00dev); - - return 0; - -exit: - rt2x00lib_disable_radio(rt2x00dev); - rt2x00lib_uninitialize(rt2x00dev); - rt2x00debug_deregister(rt2x00dev); - - return retval; -} -EXPORT_SYMBOL_GPL(rt2x00lib_resume); -#endif /* CONFIG_PM */ - -/* - * rt2x00lib module information. - */ -MODULE_AUTHOR(DRV_PROJECT); -MODULE_VERSION(DRV_VERSION); -MODULE_DESCRIPTION("rt2x00 library"); -MODULE_LICENSE("GPL"); |