diff options
Diffstat (limited to 'drivers/net/wireless/ralink/rt2x00/rt2x00.h')
| -rw-r--r-- | drivers/net/wireless/ralink/rt2x00/rt2x00.h | 1494 |
1 files changed, 1494 insertions, 0 deletions
diff --git a/drivers/net/wireless/ralink/rt2x00/rt2x00.h b/drivers/net/wireless/ralink/rt2x00/rt2x00.h new file mode 100644 index 0000000..5fa05e1 --- /dev/null +++ b/drivers/net/wireless/ralink/rt2x00/rt2x00.h @@ -0,0 +1,1494 @@ +/* + Copyright (C) 2010 Willow Garage <http://www.willowgarage.com> + Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com> + Copyright (C) 2004 - 2009 Gertjan van Wingerde <gwingerde@gmail.com> + <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, see <http://www.gnu.org/licenses/>. + */ + +/* + Module: rt2x00 + Abstract: rt2x00 global information. + */ + +#ifndef RT2X00_H +#define RT2X00_H + +#include <linux/bitops.h> +#include <linux/interrupt.h> +#include <linux/skbuff.h> +#include <linux/workqueue.h> +#include <linux/firmware.h> +#include <linux/leds.h> +#include <linux/mutex.h> +#include <linux/etherdevice.h> +#include <linux/input-polldev.h> +#include <linux/kfifo.h> +#include <linux/hrtimer.h> +#include <linux/average.h> +#include <linux/usb.h> +#include <linux/clk.h> + +#include <net/mac80211.h> + +#include "rt2x00debug.h" +#include "rt2x00dump.h" +#include "rt2x00leds.h" +#include "rt2x00reg.h" +#include "rt2x00queue.h" + +/* + * Module information. + */ +#define DRV_VERSION "2.3.0" +#define DRV_PROJECT "http://rt2x00.serialmonkey.com" + +/* Debug definitions. + * Debug output has to be enabled during compile time. + */ +#ifdef CPTCFG_RT2X00_DEBUG +#define DEBUG +#endif /* CPTCFG_RT2X00_DEBUG */ + +/* Utility printing macros + * rt2x00_probe_err is for messages when rt2x00_dev is uninitialized + */ +#define rt2x00_probe_err(fmt, ...) \ + printk(KERN_ERR KBUILD_MODNAME ": %s: Error - " fmt, \ + __func__, ##__VA_ARGS__) +#define rt2x00_err(dev, fmt, ...) \ + wiphy_err((dev)->hw->wiphy, "%s: Error - " fmt, \ + __func__, ##__VA_ARGS__) +#define rt2x00_warn(dev, fmt, ...) \ + wiphy_warn((dev)->hw->wiphy, "%s: Warning - " fmt, \ + __func__, ##__VA_ARGS__) +#define rt2x00_info(dev, fmt, ...) \ + wiphy_info((dev)->hw->wiphy, "%s: Info - " fmt, \ + __func__, ##__VA_ARGS__) + +/* Various debug levels */ +#define rt2x00_dbg(dev, fmt, ...) \ + wiphy_dbg((dev)->hw->wiphy, "%s: Debug - " fmt, \ + __func__, ##__VA_ARGS__) +#define rt2x00_eeprom_dbg(dev, fmt, ...) \ + wiphy_dbg((dev)->hw->wiphy, "%s: EEPROM recovery - " fmt, \ + __func__, ##__VA_ARGS__) + +/* + * Duration calculations + * The rate variable passed is: 100kbs. + * To convert from bytes to bits we multiply size with 8, + * then the size is multiplied with 10 to make the + * real rate -> rate argument correction. + */ +#define GET_DURATION(__size, __rate) (((__size) * 8 * 10) / (__rate)) +#define GET_DURATION_RES(__size, __rate)(((__size) * 8 * 10) % (__rate)) + +/* + * Determine the number of L2 padding bytes required between the header and + * the payload. + */ +#define L2PAD_SIZE(__hdrlen) (-(__hdrlen) & 3) + +/* + * Determine the alignment requirement, + * to make sure the 802.11 payload is padded to a 4-byte boundrary + * we must determine the address of the payload and calculate the + * amount of bytes needed to move the data. + */ +#define ALIGN_SIZE(__skb, __header) \ + (((unsigned long)((__skb)->data + (__header))) & 3) + +/* + * Constants for extra TX headroom for alignment purposes. + */ +#define RT2X00_ALIGN_SIZE 4 /* Only whole frame needs alignment */ +#define RT2X00_L2PAD_SIZE 8 /* Both header & payload need alignment */ + +/* + * Standard timing and size defines. + * These values should follow the ieee80211 specifications. + */ +#define ACK_SIZE 14 +#define IEEE80211_HEADER 24 +#define PLCP 48 +#define BEACON 100 +#define PREAMBLE 144 +#define SHORT_PREAMBLE 72 +#define SLOT_TIME 20 +#define SHORT_SLOT_TIME 9 +#define SIFS 10 +#define PIFS (SIFS + SLOT_TIME) +#define SHORT_PIFS (SIFS + SHORT_SLOT_TIME) +#define DIFS (PIFS + SLOT_TIME) +#define SHORT_DIFS (SHORT_PIFS + SHORT_SLOT_TIME) +#define EIFS (SIFS + DIFS + \ + GET_DURATION(IEEE80211_HEADER + ACK_SIZE, 10)) +#define SHORT_EIFS (SIFS + SHORT_DIFS + \ + GET_DURATION(IEEE80211_HEADER + ACK_SIZE, 10)) + +enum rt2x00_chip_intf { + RT2X00_CHIP_INTF_PCI, + RT2X00_CHIP_INTF_PCIE, + RT2X00_CHIP_INTF_USB, + RT2X00_CHIP_INTF_SOC, +}; + +/* + * Chipset identification + * The chipset on the device is composed of a RT and RF chip. + * The chipset combination is important for determining device capabilities. + */ +struct rt2x00_chip { + u16 rt; +#define RT2460 0x2460 +#define RT2560 0x2560 +#define RT2570 0x2570 +#define RT2661 0x2661 +#define RT2573 0x2573 +#define RT2860 0x2860 /* 2.4GHz */ +#define RT2872 0x2872 /* WSOC */ +#define RT2883 0x2883 /* WSOC */ +#define RT3070 0x3070 +#define RT3071 0x3071 +#define RT3090 0x3090 /* 2.4GHz PCIe */ +#define RT3290 0x3290 +#define RT3352 0x3352 /* WSOC */ +#define RT3390 0x3390 +#define RT3572 0x3572 +#define RT3593 0x3593 +#define RT3883 0x3883 /* WSOC */ +#define RT5350 0x5350 /* WSOC 2.4GHz */ +#define RT5390 0x5390 /* 2.4GHz */ +#define RT5392 0x5392 /* 2.4GHz */ +#define RT5592 0x5592 + + u16 rf; + u16 rev; + + enum rt2x00_chip_intf intf; +}; + +/* + * RF register values that belong to a particular channel. + */ +struct rf_channel { + int channel; + u32 rf1; + u32 rf2; + u32 rf3; + u32 rf4; +}; + +/* + * Channel information structure + */ +struct channel_info { + unsigned int flags; +#define GEOGRAPHY_ALLOWED 0x00000001 + + short max_power; + short default_power1; + short default_power2; + short default_power3; +}; + +/* + * Antenna setup values. + */ +struct antenna_setup { + enum antenna rx; + enum antenna tx; + u8 rx_chain_num; + u8 tx_chain_num; +}; + +/* + * Quality statistics about the currently active link. + */ +struct link_qual { + /* + * Statistics required for Link tuning by driver + * The rssi value is provided by rt2x00lib during the + * link_tuner() callback function. + * The false_cca field is filled during the link_stats() + * callback function and could be used during the + * link_tuner() callback function. + */ + int rssi; + int false_cca; + + /* + * VGC levels + * Hardware driver will tune the VGC level during each call + * to the link_tuner() callback function. This vgc_level is + * is determined based on the link quality statistics like + * average RSSI and the false CCA count. + * + * In some cases the drivers need to differentiate between + * the currently "desired" VGC level and the level configured + * in the hardware. The latter is important to reduce the + * number of BBP register reads to reduce register access + * overhead. For this reason we store both values here. + */ + u8 vgc_level; + u8 vgc_level_reg; + + /* + * Statistics required for Signal quality calculation. + * These fields might be changed during the link_stats() + * callback function. + */ + int rx_success; + int rx_failed; + int tx_success; + int tx_failed; +}; + +DECLARE_EWMA(rssi, 10, 8) + +/* + * Antenna settings about the currently active link. + */ +struct link_ant { + /* + * Antenna flags + */ + unsigned int flags; +#define ANTENNA_RX_DIVERSITY 0x00000001 +#define ANTENNA_TX_DIVERSITY 0x00000002 +#define ANTENNA_MODE_SAMPLE 0x00000004 + + /* + * Currently active TX/RX antenna setup. + * When software diversity is used, this will indicate + * which antenna is actually used at this time. + */ + struct antenna_setup active; + + /* + * RSSI history information for the antenna. + * Used to determine when to switch antenna + * when using software diversity. + */ + int rssi_history; + + /* + * Current RSSI average of the currently active antenna. + * Similar to the avg_rssi in the link_qual structure + * this value is updated by using the walking average. + */ + struct ewma_rssi rssi_ant; +}; + +/* + * To optimize the quality of the link we need to store + * the quality of received frames and periodically + * optimize the link. + */ +struct link { + /* + * Link tuner counter + * The number of times the link has been tuned + * since the radio has been switched on. + */ + u32 count; + + /* + * Quality measurement values. + */ + struct link_qual qual; + + /* + * TX/RX antenna setup. + */ + struct link_ant ant; + + /* + * Currently active average RSSI value + */ + struct ewma_rssi avg_rssi; + + /* + * Work structure for scheduling periodic link tuning. + */ + struct delayed_work work; + + /* + * Work structure for scheduling periodic watchdog monitoring. + * This work must be scheduled on the kernel workqueue, while + * all other work structures must be queued on the mac80211 + * workqueue. This guarantees that the watchdog can schedule + * other work structures and wait for their completion in order + * to bring the device/driver back into the desired state. + */ + struct delayed_work watchdog_work; + + /* + * Work structure for scheduling periodic AGC adjustments. + */ + struct delayed_work agc_work; + + /* + * Work structure for scheduling periodic VCO calibration. + */ + struct delayed_work vco_work; +}; + +enum rt2x00_delayed_flags { + DELAYED_UPDATE_BEACON, +}; + +/* + * Interface structure + * Per interface configuration details, this structure + * is allocated as the private data for ieee80211_vif. + */ +struct rt2x00_intf { + /* + * beacon->skb must be protected with the mutex. + */ + struct mutex beacon_skb_mutex; + + /* + * Entry in the beacon queue which belongs to + * this interface. Each interface has its own + * dedicated beacon entry. + */ + struct queue_entry *beacon; + bool enable_beacon; + + /* + * Actions that needed rescheduling. + */ + unsigned long delayed_flags; + + /* + * Software sequence counter, this is only required + * for hardware which doesn't support hardware + * sequence counting. + */ + atomic_t seqno; +}; + +static inline struct rt2x00_intf* vif_to_intf(struct ieee80211_vif *vif) +{ + return (struct rt2x00_intf *)vif->drv_priv; +} + +/** + * struct hw_mode_spec: Hardware specifications structure + * + * Details about the supported modes, rates and channels + * of a particular chipset. This is used by rt2x00lib + * to build the ieee80211_hw_mode array for mac80211. + * + * @supported_bands: Bitmask contained the supported bands (2.4GHz, 5.2GHz). + * @supported_rates: Rate types which are supported (CCK, OFDM). + * @num_channels: Number of supported channels. This is used as array size + * for @tx_power_a, @tx_power_bg and @channels. + * @channels: Device/chipset specific channel values (See &struct rf_channel). + * @channels_info: Additional information for channels (See &struct channel_info). + * @ht: Driver HT Capabilities (See &ieee80211_sta_ht_cap). + */ +struct hw_mode_spec { + unsigned int supported_bands; +#define SUPPORT_BAND_2GHZ 0x00000001 +#define SUPPORT_BAND_5GHZ 0x00000002 + + unsigned int supported_rates; +#define SUPPORT_RATE_CCK 0x00000001 +#define SUPPORT_RATE_OFDM 0x00000002 + + unsigned int num_channels; + const struct rf_channel *channels; + const struct channel_info *channels_info; + + struct ieee80211_sta_ht_cap ht; +}; + +/* + * Configuration structure wrapper around the + * mac80211 configuration structure. + * When mac80211 configures the driver, rt2x00lib + * can precalculate values which are equal for all + * rt2x00 drivers. Those values can be stored in here. + */ +struct rt2x00lib_conf { + struct ieee80211_conf *conf; + + struct rf_channel rf; + struct channel_info channel; +}; + +/* + * Configuration structure for erp settings. + */ +struct rt2x00lib_erp { + int short_preamble; + int cts_protection; + + u32 basic_rates; + + int slot_time; + + short sifs; + short pifs; + short difs; + short eifs; + + u16 beacon_int; + u16 ht_opmode; +}; + +/* + * Configuration structure for hardware encryption. + */ +struct rt2x00lib_crypto { + enum cipher cipher; + + enum set_key_cmd cmd; + const u8 *address; + + u32 bssidx; + + u8 key[16]; + u8 tx_mic[8]; + u8 rx_mic[8]; + + int wcid; +}; + +/* + * Configuration structure wrapper around the + * rt2x00 interface configuration handler. + */ +struct rt2x00intf_conf { + /* + * Interface type + */ + enum nl80211_iftype type; + + /* + * TSF sync value, this is dependent on the operation type. + */ + enum tsf_sync sync; + + /* + * The MAC and BSSID addresses are simple array of bytes, + * these arrays are little endian, so when sending the addresses + * to the drivers, copy the it into a endian-signed variable. + * + * Note that all devices (except rt2500usb) have 32 bits + * register word sizes. This means that whatever variable we + * pass _must_ be a multiple of 32 bits. Otherwise the device + * might not accept what we are sending to it. + * This will also make it easier for the driver to write + * the data to the device. + */ + __le32 mac[2]; + __le32 bssid[2]; +}; + +/* + * Private structure for storing STA details + * wcid: Wireless Client ID + */ +struct rt2x00_sta { + int wcid; +}; + +static inline struct rt2x00_sta* sta_to_rt2x00_sta(struct ieee80211_sta *sta) +{ + return (struct rt2x00_sta *)sta->drv_priv; +} + +/* + * rt2x00lib callback functions. + */ +struct rt2x00lib_ops { + /* + * Interrupt handlers. + */ + irq_handler_t irq_handler; + + /* + * TX status tasklet handler. + */ + void (*txstatus_tasklet) (unsigned long data); + void (*pretbtt_tasklet) (unsigned long data); + void (*tbtt_tasklet) (unsigned long data); + void (*rxdone_tasklet) (unsigned long data); + void (*autowake_tasklet) (unsigned long data); + + /* + * Device init handlers. + */ + int (*probe_hw) (struct rt2x00_dev *rt2x00dev); + char *(*get_firmware_name) (struct rt2x00_dev *rt2x00dev); + int (*check_firmware) (struct rt2x00_dev *rt2x00dev, + const u8 *data, const size_t len); + int (*load_firmware) (struct rt2x00_dev *rt2x00dev, + const u8 *data, const size_t len); + + /* + * Device initialization/deinitialization handlers. + */ + int (*initialize) (struct rt2x00_dev *rt2x00dev); + void (*uninitialize) (struct rt2x00_dev *rt2x00dev); + + /* + * queue initialization handlers + */ + bool (*get_entry_state) (struct queue_entry *entry); + void (*clear_entry) (struct queue_entry *entry); + + /* + * Radio control handlers. + */ + int (*set_device_state) (struct rt2x00_dev *rt2x00dev, + enum dev_state state); + int (*rfkill_poll) (struct rt2x00_dev *rt2x00dev); + void (*link_stats) (struct rt2x00_dev *rt2x00dev, + struct link_qual *qual); + void (*reset_tuner) (struct rt2x00_dev *rt2x00dev, + struct link_qual *qual); + void (*link_tuner) (struct rt2x00_dev *rt2x00dev, + struct link_qual *qual, const u32 count); + void (*gain_calibration) (struct rt2x00_dev *rt2x00dev); + void (*vco_calibration) (struct rt2x00_dev *rt2x00dev); + + /* + * Data queue handlers. + */ + void (*watchdog) (struct rt2x00_dev *rt2x00dev); + void (*start_queue) (struct data_queue *queue); + void (*kick_queue) (struct data_queue *queue); + void (*stop_queue) (struct data_queue *queue); + void (*flush_queue) (struct data_queue *queue, bool drop); + void (*tx_dma_done) (struct queue_entry *entry); + + /* + * TX control handlers + */ + void (*write_tx_desc) (struct queue_entry *entry, + struct txentry_desc *txdesc); + void (*write_tx_data) (struct queue_entry *entry, + struct txentry_desc *txdesc); + void (*write_beacon) (struct queue_entry *entry, + struct txentry_desc *txdesc); + void (*clear_beacon) (struct queue_entry *entry); + int (*get_tx_data_len) (struct queue_entry *entry); + + /* + * RX control handlers + */ + void (*fill_rxdone) (struct queue_entry *entry, + struct rxdone_entry_desc *rxdesc); + + /* + * Configuration handlers. + */ + int (*config_shared_key) (struct rt2x00_dev *rt2x00dev, + struct rt2x00lib_crypto *crypto, + struct ieee80211_key_conf *key); + int (*config_pairwise_key) (struct rt2x00_dev *rt2x00dev, + struct rt2x00lib_crypto *crypto, + struct ieee80211_key_conf *key); + void (*config_filter) (struct rt2x00_dev *rt2x00dev, + const unsigned int filter_flags); + void (*config_intf) (struct rt2x00_dev *rt2x00dev, + struct rt2x00_intf *intf, + struct rt2x00intf_conf *conf, + const unsigned int flags); +#define CONFIG_UPDATE_TYPE ( 1 << 1 ) +#define CONFIG_UPDATE_MAC ( 1 << 2 ) +#define CONFIG_UPDATE_BSSID ( 1 << 3 ) + + void (*config_erp) (struct rt2x00_dev *rt2x00dev, + struct rt2x00lib_erp *erp, + u32 changed); + void (*config_ant) (struct rt2x00_dev *rt2x00dev, + struct antenna_setup *ant); + void (*config) (struct rt2x00_dev *rt2x00dev, + struct rt2x00lib_conf *libconf, + const unsigned int changed_flags); + int (*sta_add) (struct rt2x00_dev *rt2x00dev, + struct ieee80211_vif *vif, + struct ieee80211_sta *sta); + int (*sta_remove) (struct rt2x00_dev *rt2x00dev, + struct ieee80211_sta *sta); +}; + +/* + * rt2x00 driver callback operation structure. + */ +struct rt2x00_ops { + const char *name; + const unsigned int drv_data_size; + const unsigned int max_ap_intf; + const unsigned int eeprom_size; + const unsigned int rf_size; + const unsigned int tx_queues; + void (*queue_init)(struct data_queue *queue); + const struct rt2x00lib_ops *lib; + const void *drv; + const struct ieee80211_ops *hw; +#ifdef CPTCFG_RT2X00_LIB_DEBUGFS + const struct rt2x00debug *debugfs; +#endif /* CPTCFG_RT2X00_LIB_DEBUGFS */ +}; + +/* + * rt2x00 state flags + */ +enum rt2x00_state_flags { + /* + * Device flags + */ + DEVICE_STATE_PRESENT, + DEVICE_STATE_REGISTERED_HW, + DEVICE_STATE_INITIALIZED, + DEVICE_STATE_STARTED, + DEVICE_STATE_ENABLED_RADIO, + DEVICE_STATE_SCANNING, + + /* + * Driver configuration + */ + CONFIG_CHANNEL_HT40, + CONFIG_POWERSAVING, + CONFIG_HT_DISABLED, + CONFIG_QOS_DISABLED, + CONFIG_MONITORING, + + /* + * Mark we currently are sequentially reading TX_STA_FIFO register + * FIXME: this is for only rt2800usb, should go to private data + */ + TX_STATUS_READING, +}; + +/* + * rt2x00 capability flags + */ +enum rt2x00_capability_flags { + /* + * Requirements + */ + REQUIRE_FIRMWARE, + REQUIRE_BEACON_GUARD, + REQUIRE_ATIM_QUEUE, + REQUIRE_DMA, + REQUIRE_COPY_IV, + REQUIRE_L2PAD, + REQUIRE_TXSTATUS_FIFO, + REQUIRE_TASKLET_CONTEXT, + REQUIRE_SW_SEQNO, + REQUIRE_HT_TX_DESC, + REQUIRE_PS_AUTOWAKE, + REQUIRE_DELAYED_RFKILL, + + /* + * Capabilities + */ + CAPABILITY_HW_BUTTON, + CAPABILITY_HW_CRYPTO, + CAPABILITY_POWER_LIMIT, + CAPABILITY_CONTROL_FILTERS, + CAPABILITY_CONTROL_FILTER_PSPOLL, + CAPABILITY_PRE_TBTT_INTERRUPT, + CAPABILITY_LINK_TUNING, + CAPABILITY_FRAME_TYPE, + CAPABILITY_RF_SEQUENCE, + CAPABILITY_EXTERNAL_LNA_A, + CAPABILITY_EXTERNAL_LNA_BG, + CAPABILITY_DOUBLE_ANTENNA, + CAPABILITY_BT_COEXIST, + CAPABILITY_VCO_RECALIBRATION, + CAPABILITY_INTERNAL_PA_TX0, + CAPABILITY_INTERNAL_PA_TX1, +}; + +/* + * Interface combinations + */ +enum { + IF_COMB_AP = 0, + NUM_IF_COMB, +}; + +/* + * rt2x00 device structure. + */ +struct rt2x00_dev { + /* + * Device structure. + * The structure stored in here depends on the + * system bus (PCI or USB). + * When accessing this variable, the rt2x00dev_{pci,usb} + * macros should be used for correct typecasting. + */ + struct device *dev; + + /* + * Callback functions. + */ + const struct rt2x00_ops *ops; + + /* + * Driver data. + */ + void *drv_data; + + /* + * IEEE80211 control structure. + */ + struct ieee80211_hw *hw; + struct ieee80211_supported_band bands[NUM_NL80211_BANDS]; + enum nl80211_band curr_band; + int curr_freq; + + /* + * If enabled, the debugfs interface structures + * required for deregistration of debugfs. + */ +#ifdef CPTCFG_RT2X00_LIB_DEBUGFS + struct rt2x00debug_intf *debugfs_intf; +#endif /* CPTCFG_RT2X00_LIB_DEBUGFS */ + + /* + * LED structure for changing the LED status + * by mac8011 or the kernel. + */ +#ifdef CPTCFG_RT2X00_LIB_LEDS + struct rt2x00_led led_radio; + struct rt2x00_led led_assoc; + struct rt2x00_led led_qual; + u16 led_mcu_reg; +#endif /* CPTCFG_RT2X00_LIB_LEDS */ + + /* + * Device state flags. + * In these flags the current status is stored. + * Access to these flags should occur atomically. + */ + unsigned long flags; + + /* + * Device capabiltiy flags. + * In these flags the device/driver capabilities are stored. + * Access to these flags should occur non-atomically. + */ + unsigned long cap_flags; + + /* + * Device information, Bus IRQ and name (PCI, SoC) + */ + int irq; + const char *name; + + /* + * Chipset identification. + */ + struct rt2x00_chip chip; + + /* + * hw capability specifications. + */ + struct hw_mode_spec spec; + + /* + * This is the default TX/RX antenna setup as indicated + * by the device's EEPROM. + */ + struct antenna_setup default_ant; + + /* + * Register pointers + * csr.base: CSR base register address. (PCI) + * csr.cache: CSR cache for usb_control_msg. (USB) + */ + union csr { + void __iomem *base; + void *cache; + } csr; + + /* + * Mutex to protect register accesses. + * For PCI and USB devices it protects against concurrent indirect + * register access (BBP, RF, MCU) since accessing those + * registers require multiple calls to the CSR registers. + * For USB devices it also protects the csr_cache since that + * field is used for normal CSR access and it cannot support + * multiple callers simultaneously. + */ + struct mutex csr_mutex; + + /* + * Mutex to synchronize config and link tuner. + */ + struct mutex conf_mutex; + /* + * Current packet filter configuration for the device. + * This contains all currently active FIF_* flags send + * to us by mac80211 during configure_filter(). + */ + unsigned int packet_filter; + + /* + * Interface details: + * - Open ap interface count. + * - Open sta interface count. + * - Association count. + * - Beaconing enabled count. + */ + unsigned int intf_ap_count; + unsigned int intf_sta_count; + unsigned int intf_associated; + unsigned int intf_beaconing; + + /* + * Interface combinations + */ + struct ieee80211_iface_limit if_limits_ap; + struct ieee80211_iface_combination if_combinations[NUM_IF_COMB]; + + /* + * Link quality + */ + struct link link; + + /* + * EEPROM data. + */ + __le16 *eeprom; + + /* + * Active RF register values. + * These are stored here so we don't need + * to read the rf registers and can directly + * use this value instead. + * This field should be accessed by using + * rt2x00_rf_read() and rt2x00_rf_write(). + */ + u32 *rf; + + /* + * LNA gain + */ + short lna_gain; + + /* + * Current TX power value. + */ + u16 tx_power; + + /* + * Current retry values. + */ + u8 short_retry; + u8 long_retry; + + /* + * Rssi <-> Dbm offset + */ + u8 rssi_offset; + + /* + * Frequency offset. + */ + u8 freq_offset; + + /* + * Association id. + */ + u16 aid; + + /* + * Beacon interval. + */ + u16 beacon_int; + + /** + * Timestamp of last received beacon + */ + unsigned long last_beacon; + + /* + * Low level statistics which will have + * to be kept up to date while device is running. + */ + struct ieee80211_low_level_stats low_level_stats; + + /** + * Work queue for all work which should not be placed + * on the mac80211 workqueue (because of dependencies + * between various work structures). + */ + struct workqueue_struct *workqueue; + + /* + * Scheduled work. + * NOTE: intf_work will use ieee80211_iterate_active_interfaces() + * which means it cannot be placed on the hw->workqueue + * due to RTNL locking requirements. + */ + struct work_struct intf_work; + + /** + * Scheduled work for TX/RX done handling (USB devices) + */ + struct work_struct rxdone_work; + struct work_struct txdone_work; + + /* + * Powersaving work + */ + struct delayed_work autowakeup_work; + struct work_struct sleep_work; + + /* + * Data queue arrays for RX, TX, Beacon and ATIM. + */ + unsigned int data_queues; + struct data_queue *rx; + struct data_queue *tx; + struct data_queue *bcn; + struct data_queue *atim; + + /* + * Firmware image. + */ + const struct firmware *fw; + + /* + * FIFO for storing tx status reports between isr and tasklet. + */ + DECLARE_KFIFO_PTR(txstatus_fifo, u32); + + /* + * Timer to ensure tx status reports are read (rt2800usb). + */ + struct hrtimer txstatus_timer; + + /* + * Tasklet for processing tx status reports (rt2800pci). + */ + struct tasklet_struct txstatus_tasklet; + struct tasklet_struct pretbtt_tasklet; + struct tasklet_struct tbtt_tasklet; + struct tasklet_struct rxdone_tasklet; + struct tasklet_struct autowake_tasklet; + + /* + * Used for VCO periodic calibration. + */ + int rf_channel; + + /* + * Protect the interrupt mask register. + */ + spinlock_t irqmask_lock; + + /* + * List of BlockAckReq TX entries that need driver BlockAck processing. + */ + struct list_head bar_list; + spinlock_t bar_list_lock; + + /* Extra TX headroom required for alignment purposes. */ + unsigned int extra_tx_headroom; + + struct usb_anchor *anchor; + + /* Clock for System On Chip devices. */ + struct clk *clk; +}; + +struct rt2x00_bar_list_entry { + struct list_head list; + struct rcu_head head; + + struct queue_entry *entry; + int block_acked; + + /* Relevant parts of the IEEE80211 BAR header */ + __u8 ra[6]; + __u8 ta[6]; + __le16 control; + __le16 start_seq_num; +}; + +/* + * Register defines. + * Some registers require multiple attempts before success, + * in those cases REGISTER_BUSY_COUNT attempts should be + * taken with a REGISTER_BUSY_DELAY interval. Due to USB + * bus delays, we do not have to loop so many times to wait + * for valid register value on that bus. + */ +#define REGISTER_BUSY_COUNT 100 +#define REGISTER_USB_BUSY_COUNT 20 +#define REGISTER_BUSY_DELAY 100 + +/* + * Generic RF access. + * The RF is being accessed by word index. + */ +static inline void rt2x00_rf_read(struct rt2x00_dev *rt2x00dev, + const unsigned int word, u32 *data) +{ + BUG_ON(word < 1 || word > rt2x00dev->ops->rf_size / sizeof(u32)); + *data = rt2x00dev->rf[word - 1]; +} + +static inline void rt2x00_rf_write(struct rt2x00_dev *rt2x00dev, + const unsigned int word, u32 data) +{ + BUG_ON(word < 1 || word > rt2x00dev->ops->rf_size / sizeof(u32)); + rt2x00dev->rf[word - 1] = data; +} + +/* + * Generic EEPROM access. The EEPROM is being accessed by word or byte index. + */ +static inline void *rt2x00_eeprom_addr(struct rt2x00_dev *rt2x00dev, + const unsigned int word) +{ + return (void *)&rt2x00dev->eeprom[word]; +} + +static inline void rt2x00_eeprom_read(struct rt2x00_dev *rt2x00dev, + const unsigned int word, u16 *data) +{ + *data = le16_to_cpu(rt2x00dev->eeprom[word]); +} + +static inline void rt2x00_eeprom_write(struct rt2x00_dev *rt2x00dev, + const unsigned int word, u16 data) +{ + rt2x00dev->eeprom[word] = cpu_to_le16(data); +} + +static inline u8 rt2x00_eeprom_byte(struct rt2x00_dev *rt2x00dev, + const unsigned int byte) +{ + return *(((u8 *)rt2x00dev->eeprom) + byte); +} + +/* + * Chipset handlers + */ +static inline void rt2x00_set_chip(struct rt2x00_dev *rt2x00dev, + const u16 rt, const u16 rf, const u16 rev) +{ + rt2x00dev->chip.rt = rt; + rt2x00dev->chip.rf = rf; + rt2x00dev->chip.rev = rev; + + rt2x00_info(rt2x00dev, "Chipset detected - rt: %04x, rf: %04x, rev: %04x\n", + rt2x00dev->chip.rt, rt2x00dev->chip.rf, + rt2x00dev->chip.rev); +} + +static inline void rt2x00_set_rt(struct rt2x00_dev *rt2x00dev, + const u16 rt, const u16 rev) +{ + rt2x00dev->chip.rt = rt; + rt2x00dev->chip.rev = rev; + + rt2x00_info(rt2x00dev, "RT chipset %04x, rev %04x detected\n", + rt2x00dev->chip.rt, rt2x00dev->chip.rev); +} + +static inline void rt2x00_set_rf(struct rt2x00_dev *rt2x00dev, const u16 rf) +{ + rt2x00dev->chip.rf = rf; + + rt2x00_info(rt2x00dev, "RF chipset %04x detected\n", + rt2x00dev->chip.rf); +} + +static inline bool rt2x00_rt(struct rt2x00_dev *rt2x00dev, const u16 rt) +{ + return (rt2x00dev->chip.rt == rt); +} + +static inline bool rt2x00_rf(struct rt2x00_dev *rt2x00dev, const u16 rf) +{ + return (rt2x00dev->chip.rf == rf); +} + +static inline u16 rt2x00_rev(struct rt2x00_dev *rt2x00dev) +{ + return rt2x00dev->chip.rev; +} + +static inline bool rt2x00_rt_rev(struct rt2x00_dev *rt2x00dev, + const u16 rt, const u16 rev) +{ + return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) == rev); +} + +static inline bool rt2x00_rt_rev_lt(struct rt2x00_dev *rt2x00dev, + const u16 rt, const u16 rev) +{ + return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) < rev); +} + +static inline bool rt2x00_rt_rev_gte(struct rt2x00_dev *rt2x00dev, + const u16 rt, const u16 rev) +{ + return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) >= rev); +} + +static inline void rt2x00_set_chip_intf(struct rt2x00_dev *rt2x00dev, + enum rt2x00_chip_intf intf) +{ + rt2x00dev->chip.intf = intf; +} + +static inline bool rt2x00_intf(struct rt2x00_dev *rt2x00dev, + enum rt2x00_chip_intf intf) +{ + return (rt2x00dev->chip.intf == intf); +} + +static inline bool rt2x00_is_pci(struct rt2x00_dev *rt2x00dev) +{ + return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_PCI) || + rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE); +} + +static inline bool rt2x00_is_pcie(struct rt2x00_dev *rt2x00dev) +{ + return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE); +} + +static inline bool rt2x00_is_usb(struct rt2x00_dev *rt2x00dev) +{ + return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_USB); +} + +static inline bool rt2x00_is_soc(struct rt2x00_dev *rt2x00dev) +{ + return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_SOC); +} + +/* Helpers for capability flags */ + +static inline bool +rt2x00_has_cap_flag(struct rt2x00_dev *rt2x00dev, + enum rt2x00_capability_flags cap_flag) +{ + return test_bit(cap_flag, &rt2x00dev->cap_flags); +} + +static inline bool +rt2x00_has_cap_hw_crypto(struct rt2x00_dev *rt2x00dev) +{ + return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_HW_CRYPTO); +} + +static inline bool +rt2x00_has_cap_power_limit(struct rt2x00_dev *rt2x00dev) +{ + return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_POWER_LIMIT); +} + +static inline bool +rt2x00_has_cap_control_filters(struct rt2x00_dev *rt2x00dev) +{ + return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_CONTROL_FILTERS); +} + +static inline bool +rt2x00_has_cap_control_filter_pspoll(struct rt2x00_dev *rt2x00dev) +{ + return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_CONTROL_FILTER_PSPOLL); +} + +static inline bool +rt2x00_has_cap_pre_tbtt_interrupt(struct rt2x00_dev *rt2x00dev) +{ + return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_PRE_TBTT_INTERRUPT); +} + +static inline bool +rt2x00_has_cap_link_tuning(struct rt2x00_dev *rt2x00dev) +{ + return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_LINK_TUNING); +} + +static inline bool +rt2x00_has_cap_frame_type(struct rt2x00_dev *rt2x00dev) +{ + return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_FRAME_TYPE); +} + +static inline bool +rt2x00_has_cap_rf_sequence(struct rt2x00_dev *rt2x00dev) +{ + return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_RF_SEQUENCE); +} + +static inline bool +rt2x00_has_cap_external_lna_a(struct rt2x00_dev *rt2x00dev) +{ + return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_EXTERNAL_LNA_A); +} + +static inline bool +rt2x00_has_cap_external_lna_bg(struct rt2x00_dev *rt2x00dev) +{ + return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_EXTERNAL_LNA_BG); +} + +static inline bool +rt2x00_has_cap_double_antenna(struct rt2x00_dev *rt2x00dev) +{ + return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_DOUBLE_ANTENNA); +} + +static inline bool +rt2x00_has_cap_bt_coexist(struct rt2x00_dev *rt2x00dev) +{ + return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_BT_COEXIST); +} + +static inline bool +rt2x00_has_cap_vco_recalibration(struct rt2x00_dev *rt2x00dev) +{ + return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_VCO_RECALIBRATION); +} + +/** + * rt2x00queue_map_txskb - Map a skb into DMA for TX purposes. + * @entry: Pointer to &struct queue_entry + * + * Returns -ENOMEM if mapping fail, 0 otherwise. + */ +int rt2x00queue_map_txskb(struct queue_entry *entry); + +/** + * rt2x00queue_unmap_skb - Unmap a skb from DMA. + * @entry: Pointer to &struct queue_entry + */ +void rt2x00queue_unmap_skb(struct queue_entry *entry); + +/** + * rt2x00queue_get_tx_queue - Convert tx queue index to queue pointer + * @rt2x00dev: Pointer to &struct rt2x00_dev. + * @queue: rt2x00 queue index (see &enum data_queue_qid). + * + * Returns NULL for non tx queues. + */ +static inline struct data_queue * +rt2x00queue_get_tx_queue(struct rt2x00_dev *rt2x00dev, + const enum data_queue_qid queue) +{ + if (queue < rt2x00dev->ops->tx_queues && rt2x00dev->tx) + return &rt2x00dev->tx[queue]; + + if (queue == QID_ATIM) + return rt2x00dev->atim; + + return NULL; +} + +/** + * rt2x00queue_get_entry - Get queue entry where the given index points to. + * @queue: Pointer to &struct data_queue from where we obtain the entry. + * @index: Index identifier for obtaining the correct index. + */ +struct queue_entry *rt2x00queue_get_entry(struct data_queue *queue, + enum queue_index index); + +/** + * rt2x00queue_pause_queue - Pause a data queue + * @queue: Pointer to &struct data_queue. + * + * This function will pause the data queue locally, preventing + * new frames to be added to the queue (while the hardware is + * still allowed to run). + */ +void rt2x00queue_pause_queue(struct data_queue *queue); + +/** + * rt2x00queue_unpause_queue - unpause a data queue + * @queue: Pointer to &struct data_queue. + * + * This function will unpause the data queue locally, allowing + * new frames to be added to the queue again. + */ +void rt2x00queue_unpause_queue(struct data_queue *queue); + +/** + * rt2x00queue_start_queue - Start a data queue + * @queue: Pointer to &struct data_queue. + * + * This function will start handling all pending frames in the queue. + */ +void rt2x00queue_start_queue(struct data_queue *queue); + +/** + * rt2x00queue_stop_queue - Halt a data queue + * @queue: Pointer to &struct data_queue. + * + * This function will stop all pending frames in the queue. + */ +void rt2x00queue_stop_queue(struct data_queue *queue); + +/** + * rt2x00queue_flush_queue - Flush a data queue + * @queue: Pointer to &struct data_queue. + * @drop: True to drop all pending frames. + * + * This function will flush the queue. After this call + * the queue is guaranteed to be empty. + */ +void rt2x00queue_flush_queue(struct data_queue *queue, bool drop); + +/** + * rt2x00queue_start_queues - Start all data queues + * @rt2x00dev: Pointer to &struct rt2x00_dev. + * + * This function will loop through all available queues to start them + */ +void rt2x00queue_start_queues(struct rt2x00_dev *rt2x00dev); + +/** + * rt2x00queue_stop_queues - Halt all data queues + * @rt2x00dev: Pointer to &struct rt2x00_dev. + * + * This function will loop through all available queues to stop + * any pending frames. + */ +void rt2x00queue_stop_queues(struct rt2x00_dev *rt2x00dev); + +/** + * rt2x00queue_flush_queues - Flush all data queues + * @rt2x00dev: Pointer to &struct rt2x00_dev. + * @drop: True to drop all pending frames. + * + * This function will loop through all available queues to flush + * any pending frames. + */ +void rt2x00queue_flush_queues(struct rt2x00_dev *rt2x00dev, bool drop); + +/* + * Debugfs handlers. + */ +/** + * rt2x00debug_dump_frame - Dump a frame to userspace through debugfs. + * @rt2x00dev: Pointer to &struct rt2x00_dev. + * @type: The type of frame that is being dumped. + * @skb: The skb containing the frame to be dumped. + */ +#ifdef CPTCFG_RT2X00_LIB_DEBUGFS +void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev, + enum rt2x00_dump_type type, struct queue_entry *entry); +#else +static inline void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev, + enum rt2x00_dump_type type, + struct queue_entry *entry) +{ +} +#endif /* CPTCFG_RT2X00_LIB_DEBUGFS */ + +/* + * Utility functions. + */ +u32 rt2x00lib_get_bssidx(struct rt2x00_dev *rt2x00dev, + struct ieee80211_vif *vif); +void rt2x00lib_set_mac_address(struct rt2x00_dev *rt2x00dev, u8 *eeprom_mac_addr); + +/* + * Interrupt context handlers. + */ +void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev); +void rt2x00lib_pretbtt(struct rt2x00_dev *rt2x00dev); +void rt2x00lib_dmastart(struct queue_entry *entry); +void rt2x00lib_dmadone(struct queue_entry *entry); +void rt2x00lib_txdone(struct queue_entry *entry, + struct txdone_entry_desc *txdesc); +void rt2x00lib_txdone_noinfo(struct queue_entry *entry, u32 status); +void rt2x00lib_rxdone(struct queue_entry *entry, gfp_t gfp); + +/* + * mac80211 handlers. + */ +void rt2x00mac_tx(struct ieee80211_hw *hw, + struct ieee80211_tx_control *control, + struct sk_buff *skb); +int rt2x00mac_start(struct ieee80211_hw *hw); +void rt2x00mac_stop(struct ieee80211_hw *hw); +int rt2x00mac_add_interface(struct ieee80211_hw *hw, + struct ieee80211_vif *vif); +void rt2x00mac_remove_interface(struct ieee80211_hw *hw, + struct ieee80211_vif *vif); +int rt2x00mac_config(struct ieee80211_hw *hw, u32 changed); +void rt2x00mac_configure_filter(struct ieee80211_hw *hw, + unsigned int changed_flags, + unsigned int *total_flags, + u64 multicast); +int rt2x00mac_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta, + bool set); +#ifdef CPTCFG_RT2X00_LIB_CRYPTO +int rt2x00mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, + struct ieee80211_vif *vif, struct ieee80211_sta *sta, + struct ieee80211_key_conf *key); +#else +#define rt2x00mac_set_key NULL +#endif /* CPTCFG_RT2X00_LIB_CRYPTO */ +int rt2x00mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, + struct ieee80211_sta *sta); +int rt2x00mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif, + struct ieee80211_sta *sta); +void rt2x00mac_sw_scan_start(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + const u8 *mac_addr); +void rt2x00mac_sw_scan_complete(struct ieee80211_hw *hw, + struct ieee80211_vif *vif); +int rt2x00mac_get_stats(struct ieee80211_hw *hw, + struct ieee80211_low_level_stats *stats); +void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_bss_conf *bss_conf, + u32 changes); +int rt2x00mac_conf_tx(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, u16 queue, + const struct ieee80211_tx_queue_params *params); +void rt2x00mac_rfkill_poll(struct ieee80211_hw *hw); +void rt2x00mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, + u32 queues, bool drop); +int rt2x00mac_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant); +int rt2x00mac_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant); +void rt2x00mac_get_ringparam(struct ieee80211_hw *hw, + u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max); +bool rt2x00mac_tx_frames_pending(struct ieee80211_hw *hw); + +/* + * Driver allocation handlers. + */ +int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev); +void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev); +#ifdef CONFIG_PM +int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state); +int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev); +#endif /* CONFIG_PM */ + +#endif /* RT2X00_H */ |