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-rw-r--r--package/rt2x00/src/rt2x00dev.c1082
1 files changed, 1082 insertions, 0 deletions
diff --git a/package/rt2x00/src/rt2x00dev.c b/package/rt2x00/src/rt2x00dev.c
new file mode 100644
index 0000000000..448f1bcade
--- /dev/null
+++ b/package/rt2x00/src/rt2x00dev.c
@@ -0,0 +1,1082 @@
+/*
+ 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.
+ Supported chipsets: RT2460, RT2560, RT2570,
+ rt2561, rt2561s, rt2661, rt2571W & rt2671.
+ */
+
+/*
+ * Set enviroment defines for rt2x00.h
+ */
+#define DRV_NAME "rt2x00lib"
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/etherdevice.h>
+
+#include "rt2x00.h"
+#include "rt2x00dev.h"
+
+/*
+ * Radio control handlers.
+ */
+int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev)
+{
+ int status;
+
+ /*
+ * Don't enable the radio twice.
+ * or 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;
+
+ status = rt2x00dev->ops->lib->set_device_state(
+ rt2x00dev, STATE_RADIO_ON);
+ if (status)
+ return status;
+
+ __set_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags);
+
+ rt2x00lib_toggle_rx(rt2x00dev, 1);
+
+ 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;
+
+ ieee80211_stop_queues(rt2x00dev->hw);
+
+ rt2x00lib_toggle_rx(rt2x00dev, 0);
+
+ rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF);
+}
+
+void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, int enable)
+{
+ /*
+ * When we are disabling the rx, we should also stop the link tuner.
+ */
+ if (!enable && work_pending(&rt2x00dev->link.work.work))
+ rt2x00_stop_link_tune(rt2x00dev);
+
+ rt2x00dev->ops->lib->set_device_state(rt2x00dev,
+ enable ? STATE_RADIO_RX_ON : STATE_RADIO_RX_OFF);
+
+ /*
+ * When we are enabling the rx, we should also start the link tuner.
+ */
+ if (enable)
+ rt2x00_start_link_tune(rt2x00dev);
+}
+
+static void rt2x00lib_link_tuner(struct work_struct *work)
+{
+ struct rt2x00_dev *rt2x00dev =
+ container_of(work, struct rt2x00_dev, link.work.work);
+ int rssi;
+
+ /*
+ * Update promisc mode (this function will first check
+ * if updating is really required).
+ */
+ rt2x00lib_config_promisc(rt2x00dev, rt2x00dev->interface.promisc);
+
+ /*
+ * Cancel all link tuning if the eeprom has indicated
+ * it is not required.
+ */
+ if (test_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags))
+ return;
+
+ /*
+ * Retrieve link quality.
+ * Also convert rssi to dBm using the max_rssi value.
+ */
+ rssi = rt2x00_get_link_rssi(&rt2x00dev->link);
+ rssi -= rt2x00dev->hw->max_rssi;
+
+ rt2x00dev->ops->lib->link_tuner(rt2x00dev, rssi);
+
+ /*
+ * Increase tuner counter, and reschedule the next link tuner run.
+ */
+ rt2x00dev->link.count++;
+ queue_delayed_work(rt2x00dev->workqueue, &rt2x00dev->link.work,
+ LINK_TUNE_INTERVAL);
+}
+
+/*
+ * Config handlers
+ */
+void rt2x00lib_config_type(struct rt2x00_dev *rt2x00dev, const int type)
+{
+ if (!(is_interface_present(&rt2x00dev->interface) ^
+ test_bit(INTERFACE_ENABLED, &rt2x00dev->flags)) &&
+ !(is_monitor_present(&rt2x00dev->interface) ^
+ test_bit(INTERFACE_ENABLED_MONITOR, &rt2x00dev->flags)))
+ return;
+
+ rt2x00dev->ops->lib->config_type(rt2x00dev, type);
+
+ if (type != IEEE80211_IF_TYPE_MNTR) {
+ if (is_interface_present(&rt2x00dev->interface))
+ __set_bit(INTERFACE_ENABLED, &rt2x00dev->flags);
+ else
+ __clear_bit(INTERFACE_ENABLED, &rt2x00dev->flags);
+ } else {
+ if (is_monitor_present(&rt2x00dev->interface))
+ __set_bit(INTERFACE_ENABLED_MONITOR,
+ &rt2x00dev->flags);
+ else
+ __clear_bit(INTERFACE_ENABLED_MONITOR,
+ &rt2x00dev->flags);
+ }
+}
+
+void rt2x00lib_config_phymode(struct rt2x00_dev *rt2x00dev, const int phymode)
+{
+ if (rt2x00dev->rx_status.phymode == phymode)
+ return;
+
+ rt2x00dev->ops->lib->config_phymode(rt2x00dev, phymode);
+
+ rt2x00dev->rx_status.phymode = phymode;
+}
+
+void rt2x00lib_config_channel(struct rt2x00_dev *rt2x00dev, const int value,
+ const int channel, const int freq, const int txpower)
+{
+ if (channel == rt2x00dev->rx_status.channel)
+ return;
+
+ rt2x00dev->ops->lib->config_channel(rt2x00dev, value, channel, txpower);
+
+ INFO(rt2x00dev, "Switching channel. "
+ "RF1: 0x%08x, RF2: 0x%08x, RF3: 0x%08x, RF3: 0x%08x.\n",
+ rt2x00dev->rf1, rt2x00dev->rf2,
+ rt2x00dev->rf3, rt2x00dev->rf4);
+
+ rt2x00dev->rx_status.freq = freq;
+ rt2x00dev->rx_status.channel = channel;
+}
+
+void rt2x00lib_config_promisc(struct rt2x00_dev *rt2x00dev, const int promisc)
+{
+ /*
+ * Monitor mode implies promisc mode enabled.
+ * In all other instances, check if we need to toggle promisc mode.
+ */
+ if (is_monitor_present(&rt2x00dev->interface) &&
+ !test_bit(INTERFACE_ENABLED_PROMISC, &rt2x00dev->flags)) {
+ rt2x00dev->ops->lib->config_promisc(rt2x00dev, 1);
+ __set_bit(INTERFACE_ENABLED_PROMISC, &rt2x00dev->flags);
+ }
+
+ if (test_bit(INTERFACE_ENABLED_PROMISC, &rt2x00dev->flags) != promisc) {
+ rt2x00dev->ops->lib->config_promisc(rt2x00dev, promisc);
+ __change_bit(INTERFACE_ENABLED_PROMISC, &rt2x00dev->flags);
+ }
+}
+
+void rt2x00lib_config_txpower(struct rt2x00_dev *rt2x00dev, const int txpower)
+{
+ if (txpower == rt2x00dev->tx_power)
+ return;
+
+ rt2x00dev->ops->lib->config_txpower(rt2x00dev, txpower);
+
+ rt2x00dev->tx_power = txpower;
+}
+
+void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
+ const int antenna_tx, const int antenna_rx)
+{
+ if (rt2x00dev->rx_status.antenna == antenna_rx)
+ return;
+
+ rt2x00dev->ops->lib->config_antenna(rt2x00dev, antenna_tx, antenna_rx);
+
+ rt2x00dev->rx_status.antenna = antenna_rx;
+}
+
+/*
+ * 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_init_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, 0x001, 0x00, IEEE80211_RATE_CCK);
+ rt2x00lib_rate(&rates[1], 20, 0x003, 0x01, IEEE80211_RATE_CCK_2);
+ rt2x00lib_rate(&rates[2], 55, 0x007, 0x02, IEEE80211_RATE_CCK_2);
+ rt2x00lib_rate(&rates[3], 110, 0x00f, 0x03, IEEE80211_RATE_CCK_2);
+
+ if (spec->num_rates > 4) {
+ rt2x00lib_rate(&rates[4], 60, 0x01f, 0x0b, IEEE80211_RATE_OFDM);
+ rt2x00lib_rate(&rates[5], 90, 0x03f, 0x0f, IEEE80211_RATE_OFDM);
+ rt2x00lib_rate(&rates[6], 120, 0x07f, 0x0a, IEEE80211_RATE_OFDM);
+ rt2x00lib_rate(&rates[7], 180, 0x0ff, 0x0e, IEEE80211_RATE_OFDM);
+ rt2x00lib_rate(&rates[8], 240, 0x1ff, 0x09, IEEE80211_RATE_OFDM);
+ rt2x00lib_rate(&rates[9], 360, 0x3ff, 0x0d, IEEE80211_RATE_OFDM);
+ rt2x00lib_rate(&rates[10], 480, 0x7ff, 0x08, IEEE80211_RATE_OFDM);
+ rt2x00lib_rate(&rates[11], 540, 0xfff, 0x0c, IEEE80211_RATE_OFDM);
+ }
+
+ /*
+ * Initialize Channel list.
+ */
+ for (i = 0; i < 14; i++)
+ rt2x00lib_channel(&channels[i], i + 1,
+ spec->tx_power_bg[i], spec->chan_val_bg[i]);
+
+ if (spec->num_channels > 14) {
+ for (i = 14; i < spec->num_channels; i++) {
+ if (i < 22)
+ channels[i].chan = 36;
+ else if (i < 33)
+ channels[i].chan = 100;
+ else
+ channels[i].chan = 149;
+ channels[i].chan += ((i - 14) * 4);
+
+ if (spec->tx_power_a)
+ tx_power = spec->tx_power_a[i];
+ else
+ tx_power = spec->tx_power_default;
+
+ rt2x00lib_channel(&channels[i],
+ channels[i].chan, tx_power,
+ spec->chan_val_a[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_deinit_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_init_hw(struct rt2x00_dev *rt2x00dev)
+{
+ struct hw_mode_spec *spec = &rt2x00dev->spec;
+ int status;
+
+ /*
+ * Initialize device.
+ */
+ SET_IEEE80211_DEV(rt2x00dev->hw, rt2x00dev->device);
+
+ /*
+ * Initialize MAC address.
+ */
+ if (!is_valid_ether_addr(spec->mac_addr)) {
+ ERROR(rt2x00dev, "Invalid MAC addr: " MAC_FMT ".\n",
+ MAC_ARG(spec->mac_addr));
+ return -EINVAL;
+ }
+
+ rt2x00dev->ops->lib->config_mac_addr(rt2x00dev, spec->mac_addr);
+ SET_IEEE80211_PERM_ADDR(rt2x00dev->hw, spec->mac_addr);
+
+ /*
+ * Initialize HW modes.
+ */
+ status = rt2x00lib_init_hw_modes(rt2x00dev, spec);
+ if (status)
+ return status;
+
+ /*
+ * Register HW.
+ */
+ status = ieee80211_register_hw(rt2x00dev->hw);
+ if (status) {
+ rt2x00lib_deinit_hw(rt2x00dev);
+ return status;
+ }
+
+ __set_bit(DEVICE_INITIALIZED_HW, &rt2x00dev->flags);
+
+ return 0;
+}
+
+/*
+ * Initialization/uninitialization handlers.
+ */
+static int rt2x00lib_alloc_ring(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_allocate_rings(struct rt2x00_dev *rt2x00dev)
+{
+ struct data_ring *ring;
+
+ /*
+ * Allocate the RX ring.
+ */
+ if (rt2x00lib_alloc_ring(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_ring(ring,
+ TX_ENTRIES, DATA_FRAME_SIZE, rt2x00dev->ops->txd_size))
+ return -ENOMEM;
+ }
+
+ /*
+ * Allocate the BEACON ring.
+ */
+ if (rt2x00lib_alloc_ring(&rt2x00dev->bcn[0],
+ BEACON_ENTRIES, MGMT_FRAME_SIZE, rt2x00dev->ops->txd_size))
+ return -ENOMEM;
+
+ /*
+ * Allocate the Atim ring.
+ */
+ if (test_bit(DEVICE_SUPPORT_ATIM, &rt2x00dev->flags)) {
+ if (rt2x00lib_alloc_ring(&rt2x00dev->bcn[1],
+ ATIM_ENTRIES, DATA_FRAME_SIZE, rt2x00dev->ops->txd_size))
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static void rt2x00lib_free_rings(struct rt2x00_dev *rt2x00dev)
+{
+ struct data_ring *ring;
+
+ ring_for_each(rt2x00dev, ring) {
+ kfree(ring->entry);
+ ring->entry = NULL;
+ }
+}
+
+int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
+{
+ int status;
+
+ if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
+ return 0;
+
+ /*
+ * Allocate all data rings.
+ */
+ status = rt2x00lib_allocate_rings(rt2x00dev);
+ if (status) {
+ ERROR(rt2x00dev, "DMA 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 = rt2x00lib_register_rfkill(rt2x00dev);
+ if (status)
+ goto exit_unitialize;
+
+ return 0;
+
+exit_unitialize:
+ rt2x00lib_uninitialize(rt2x00dev);
+
+exit:
+ rt2x00lib_free_rings(rt2x00dev);
+
+ return status;
+}
+
+void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
+{
+ if (!__test_and_clear_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
+ return;
+
+ /*
+ * Flush out all pending work.
+ */
+ flush_workqueue(rt2x00dev->workqueue);
+
+ /*
+ * Unregister rfkill.
+ */
+ rt2x00lib_unregister_rfkill(rt2x00dev);
+
+ /*
+ * Allow the HW to uninitialize.
+ */
+ rt2x00dev->ops->lib->uninitialize(rt2x00dev);
+
+ /*
+ * Free allocated datarings.
+ */
+ rt2x00lib_free_rings(rt2x00dev);
+}
+
+/*
+ * driver allocation handlers.
+ */
+static int rt2x00lib_alloc_rings(struct rt2x00_dev *rt2x00dev)
+{
+ struct data_ring *ring;
+ unsigned int ring_num;
+
+ /*
+ * We need the following rings:
+ * RX: 1
+ * TX: hw->queues
+ * Beacon: 1
+ * Atim: 1 (if supported)
+ */
+ ring_num = 2 + rt2x00dev->hw->queues +
+ test_bit(DEVICE_SUPPORT_ATIM, &rt2x00dev->flags);
+
+ ring = kzalloc(sizeof(*ring) * ring_num, GFP_KERNEL);
+ if (!ring) {
+ ERROR(rt2x00dev, "Ring allocation failed.\n");
+ return -ENOMEM;
+ }
+
+ /*
+ * Initialize pointers
+ */
+ rt2x00dev->rx = &ring[0];
+ rt2x00dev->tx = &ring[1];
+ rt2x00dev->bcn = &ring[1 + 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;
+}
+
+int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
+{
+ int retval = -ENOMEM;
+
+ /*
+ * Create workqueue.
+ */
+ rt2x00dev->workqueue = create_singlethread_workqueue(DRV_NAME);
+ if (!rt2x00dev->workqueue)
+ goto exit;
+
+ /*
+ * Let the driver probe the device to detect the capabilities.
+ */
+ retval = rt2x00dev->ops->lib->init_hw(rt2x00dev);
+ if (retval) {
+ ERROR(rt2x00dev, "Failed to allocate device.\n");
+ goto exit;
+ }
+
+ /*
+ * Initialize configuration work.
+ */
+ INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner);
+
+ /*
+ * Reset current working type.
+ */
+ rt2x00dev->interface.type = -EINVAL;
+
+ /*
+ * Allocate ring array.
+ */
+ retval = rt2x00lib_alloc_rings(rt2x00dev);
+ if (retval)
+ goto exit;
+
+ /*
+ * Initialize ieee80211 structure.
+ */
+ retval = rt2x00lib_init_hw(rt2x00dev);
+ if (retval) {
+ ERROR(rt2x00dev, "Failed to initialize hw.\n");
+ goto exit;
+ }
+
+ /*
+ * Allocatie rfkill.
+ */
+ retval = rt2x00lib_allocate_rfkill(rt2x00dev);
+ if (retval)
+ goto exit;
+
+ /*
+ * Open the debugfs entry.
+ */
+ rt2x00debug_register(rt2x00dev);
+
+ /*
+ * Check if we need to load the firmware.
+ */
+ if (test_bit(FIRMWARE_REQUIRED, &rt2x00dev->flags)) {
+ /*
+ * Request firmware and wait with further
+ * initializing of the card until the firmware
+ * has been loaded.
+ */
+ retval = rt2x00lib_load_firmware(rt2x00dev);
+ if (retval)
+ goto exit;
+ }
+
+ 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
+ */
+ rt2x00lib_free_rfkill(rt2x00dev);
+
+ /*
+ * Free ieee80211_hw memory.
+ */
+ rt2x00lib_deinit_hw(rt2x00dev);
+
+ /*
+ * Free workqueue.
+ */
+ if (likely(rt2x00dev->workqueue)) {
+ destroy_workqueue(rt2x00dev->workqueue);
+ rt2x00dev->workqueue = NULL;
+ }
+
+ /*
+ * Free ring structures.
+ */
+ kfree(rt2x00dev->rx);
+ rt2x00dev->rx = NULL;
+ rt2x00dev->tx = NULL;
+ rt2x00dev->bcn = NULL;
+
+ /*
+ * Free EEPROM memory.
+ */
+ kfree(rt2x00dev->eeprom);
+ rt2x00dev->eeprom = NULL;
+}
+EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);
+
+/*
+ * Device state handlers
+ */
+int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev,
+ pm_message_t state)
+{
+ int retval;
+
+ NOTICE(rt2x00dev, "Going to sleep.\n");
+
+ rt2x00lib_disable_radio(rt2x00dev);
+
+ /*
+ * Set device mode to sleep for power management.
+ */
+ retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP);
+ if (retval)
+ return retval;
+
+ rt2x00lib_remove_dev(rt2x00dev);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
+
+int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
+{
+ int retval;
+
+ NOTICE(rt2x00dev, "Waking up.\n");
+
+ retval = rt2x00lib_probe_dev(rt2x00dev);
+ if (retval) {
+ ERROR(rt2x00dev, "Failed to allocate device.\n");
+ return retval;
+ }
+
+ /*
+ * Set device mode to awake for power management.
+ */
+ retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_AWAKE);
+ if (retval)
+ return retval;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(rt2x00lib_resume);
+
+/*
+ * Interrupt context handlers.
+ */
+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;
+
+ /*
+ * 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;
+
+ if (!(tx_status->control.flags & IEEE80211_TXCTL_NO_ACK)) {
+ if (status == TX_SUCCESS || status == TX_SUCCESS_RETRY)
+ 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 (status == TX_SUCCESS || status == TX_SUCCESS_RETRY)
+ 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, char *data,
+ const int size, 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;
+ struct sk_buff *skb;
+ 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) {
+ /*
+ * Check for preamble bit.
+ */
+ if (signal & 0x08)
+ val = rate->val2;
+ val = rate->val;
+ break;
+ }
+ }
+
+ rx_status->rate = val;
+ rx_status->ssi = rssi;
+ rx_status->noise = rt2x00dev->link.curr_noise;
+ rt2x00_update_link_rssi(&rt2x00dev->link, rssi);
+
+ /*
+ * Let's allocate a sk_buff where we can store the received data in,
+ * note that if data is NULL, we still have to allocate a sk_buff
+ * but that we should use that to replace the sk_buff which is already
+ * inside the entry.
+ */
+ skb = dev_alloc_skb(size + NET_IP_ALIGN);
+ if (!skb)
+ return;
+
+ skb_reserve(skb, NET_IP_ALIGN);
+ skb_put(skb, size);
+
+ if (data) {
+ memcpy(skb->data, data, size);
+ entry->skb = skb;
+ skb = NULL;
+ }
+
+ ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb, rx_status);
+ entry->skb = skb;
+}
+EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
+
+/*
+ * TX descriptor initializer
+ */
+void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev,
+ struct data_entry *entry, struct data_desc *txd,
+ struct ieee80211_hdr *ieee80211hdr, unsigned int length,
+ struct ieee80211_tx_control *control)
+{
+ struct data_entry_desc desc;
+ int tx_rate;
+ int bitrate;
+ int duration;
+ int residual;
+ u16 frame_control;
+ u16 seq_ctrl;
+
+ /*
+ * Identify queue
+ */
+ if (control->queue < rt2x00dev->hw->queues)
+ desc.queue = control->queue;
+ else
+ desc.queue = 15;
+
+ /*
+ * 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 frame
+ */
+ if (is_rts_frame(frame_control)) {
+ __set_bit(ENTRY_TXD_RTS_FRAME, &entry->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_RATE)
+ __set_bit(ENTRY_TXD_OFDM_RATE, &entry->flags);
+
+ /*
+ * Check if more fragments are pending
+ */
+ if (ieee80211_get_morefrag(ieee80211hdr))
+ __set_bit(ENTRY_TXD_MORE_FRAG, &entry->flags);
+
+ /*
+ * Check if this is a new sequence
+ */
+ if ((seq_ctrl & IEEE80211_SCTL_FRAG) == 0)
+ __set_bit(ENTRY_TXD_NEW_SEQ, &entry->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, &entry->flags);
+
+ /*
+ * Check if ACK is required
+ */
+ if (!(control->flags & IEEE80211_TXCTL_NO_ACK))
+ __set_bit(ENTRY_TXD_REQ_ACK, &entry->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, &entry->flags))
+ desc.ifs = IFS_SIFS;
+ else
+ desc.ifs = IFS_BACKOFF;
+
+ /*
+ * How the length should be processed depends
+ * on if we are working with OFDM rates or not.
+ */
+ if (test_bit(ENTRY_TXD_OFDM_RATE, &entry->flags)) {
+ residual = 0;
+ 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++;
+
+ desc.length_high = duration >> 8;
+ desc.length_low = duration & 0xff;
+ }
+
+ /*
+ * Create the signal and service values.
+ */
+ desc.signal = DEVICE_GET_RATE_FIELD(tx_rate, PLCP);
+ if (DEVICE_GET_RATE_FIELD(tx_rate, PREAMBLE))
+ desc.signal |= 0x08;
+
+ desc.service = 0x04;
+ if (residual <= (8 % 11))
+ desc.service |= 0x80;
+
+ rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, entry, txd, &desc,
+ ieee80211hdr, length, control);
+}
+EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc);
+
+/*
+ * rt2x00lib module information.
+ */
+MODULE_AUTHOR(DRV_PROJECT);
+MODULE_VERSION(DRV_VERSION);
+MODULE_DESCRIPTION("rt2x00 library");
+MODULE_LICENSE("GPL");