[RT2x00]: add driver for Ralink wireless hardware
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/wireless/rt2x00/rt2x00dev.c b/drivers/net/wireless/rt2x00/rt2x00dev.c
new file mode 100644
index 0000000..cd82eef
--- /dev/null
+++ b/drivers/net/wireless/rt2x00/rt2x00dev.c
@@ -0,0 +1,1133 @@
+/*
+ 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(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)
+{
+ if (delayed_work_pending(&rt2x00dev->link.work))
+ cancel_rearming_delayed_work(&rt2x00dev->link.work);
+}
+
+void rt2x00lib_reset_link_tuner(struct rt2x00_dev *rt2x00dev)
+{
+ 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_SUPPORT_HW_BUTTON, &rt2x00dev->flags) &&
+ !test_bit(DEVICE_ENABLED_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, 1);
+
+ /*
+ * 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 beacon generation.
+ */
+ if (work_pending(&rt2x00dev->beacon_work))
+ cancel_work_sync(&rt2x00dev->beacon_work);
+
+ /*
+ * Stop the TX queues.
+ */
+ ieee80211_stop_queues(rt2x00dev->hw);
+
+ /*
+ * Disable RX.
+ */
+ rt2x00lib_toggle_rx(rt2x00dev, 0);
+
+ /*
+ * Disable radio.
+ */
+ rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF);
+}
+
+void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, int enable)
+{
+ enum dev_state state = enable ? STATE_RADIO_RX_ON : STATE_RADIO_RX_OFF;
+
+ /*
+ * When we are disabling the RX, we should also stop the link tuner.
+ */
+ if (!enable)
+ 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 (enable && 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);
+
+ /*
+ * Update statistics.
+ */
+ rt2x00dev->ops->lib->link_stats(rt2x00dev);
+
+ rt2x00dev->low_level_stats.dot11FCSErrorCount +=
+ rt2x00dev->link.rx_failed;
+
+ rt2x00lib_precalculate_link_signal(&rt2x00dev->link);
+
+ /*
+ * 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);
+
+ /*
+ * 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);
+}
+
+/*
+ * 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,
+ const int signal, const int rssi, const int ofdm)
+{
+ 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 (!ofdm)
+ val = DEVICE_GET_RATE_FIELD(rate->val, RATE);
+ else
+ val = DEVICE_GET_RATE_FIELD(rate->val, PLCP);
+
+ if (val == signal) {
+ val = rate->val;
+ break;
+ }
+ }
+
+ rt2x00_update_link_rssi(&rt2x00dev->link, rssi);
+ rt2x00dev->link.rx_success++;
+ rx_status->rate = val;
+ rx_status->signal = rt2x00lib_calculate_link_signal(rt2x00dev, rssi);
+ rx_status->ssi = rssi;
+
+ /*
+ * 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 data_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 <= 3)
+ 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_INITIALIZED_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_INITIALIZED_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(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(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(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_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);
+
+ return 0;
+
+exit:
+ rt2x00lib_remove_dev(rt2x00dev);
+
+ return retval;
+}
+EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);
+
+void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
+{
+ /*
+ * 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");
+
+ /*
+ * Disable radio and unitialize all items
+ * that must be recreated on resume.
+ */
+ rt2x00lib_disable_radio(rt2x00dev);
+ rt2x00lib_uninitialize(rt2x00dev);
+ rt2x00debug_deregister(rt2x00dev);
+
+ /*
+ * 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(INTERFACE_RESUME, &rt2x00dev->flags);
+
+ /*
+ * Open the debugfs entry.
+ */
+ rt2x00debug_register(rt2x00dev);
+
+ /*
+ * Reinitialize device and all active interfaces.
+ */
+ retval = rt2x00mac_start(rt2x00dev->hw);
+ if (retval)
+ goto exit;
+
+ /*
+ * Reconfigure device.
+ */
+ retval = rt2x00mac_config(rt2x00dev->hw, &rt2x00dev->hw->conf);
+ if (retval)
+ goto exit;
+
+ rt2x00lib_config_mac_addr(rt2x00dev, intf->mac);
+ rt2x00lib_config_bssid(rt2x00dev, intf->bssid);
+ rt2x00lib_config_type(rt2x00dev, intf->type);
+ rt2x00lib_config_packet_filter(rt2x00dev, intf->filter);
+
+ /*
+ * 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);
+
+ __clear_bit(INTERFACE_RESUME, &rt2x00dev->flags);
+
+ return 0;
+
+exit:
+ rt2x00lib_disable_radio(rt2x00dev);
+ rt2x00lib_uninitialize(rt2x00dev);
+ rt2x00debug_deregister(rt2x00dev);
+
+ __clear_bit(INTERFACE_RESUME, &rt2x00dev->flags);
+
+ 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");