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Diffstat (limited to 'package/rt2x00/src/rt2x00.h')
| -rw-r--r-- | package/rt2x00/src/rt2x00.h | 1087 |
1 files changed, 1087 insertions, 0 deletions
diff --git a/package/rt2x00/src/rt2x00.h b/package/rt2x00/src/rt2x00.h new file mode 100644 index 0000000000..dbea6acf6a --- /dev/null +++ b/package/rt2x00/src/rt2x00.h @@ -0,0 +1,1087 @@ +/* + 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: rt2x00 + Abstract: rt2x00 global information. + Supported chipsets: RT2460, RT2560, RT2570, + rt2561, rt2561s, rt2661, rt2571W & rt2671. + */ + +#ifndef RT2X00_H +#define RT2X00_H + +#include <linux/bitops.h> +#include <linux/skbuff.h> +#include <linux/workqueue.h> + +#include <net/mac80211.h> + +#include "rt2x00lib.h" +#include "rt2x00debug.h" + +/* + * Module information. + */ +#ifndef DRV_NAME +#define DRV_NAME "rt2x00" +#endif /* DRV_NAME */ +#define DRV_VERSION "2.0.1" +#define DRV_PROJECT "http://rt2x00.serialmonkey.com" + +/* + * Debug definitions. + * Debug output has to be enabled during compile time. + */ +#define DEBUG_PRINTK_MSG(__dev, __kernlvl, __lvl, __msg, __args...) \ + printk(__kernlvl "%s -> %s: %s - " __msg, \ + wiphy_name(rt2x00dev->hw->wiphy), \ + __FUNCTION__, __lvl, ##__args) + +#define DEBUG_PRINTK_PROBE(__kernlvl, __lvl, __msg, __args...) \ + printk(__kernlvl "%s -> %s: %s - " __msg, \ + DRV_NAME, __FUNCTION__, __lvl, ##__args) + +#ifdef CONFIG_RT2X00_DEBUG +#define DEBUG_PRINTK(__dev, __kernlvl, __lvl, __msg, __args...) \ + DEBUG_PRINTK_MSG(__dev, __kernlvl, __lvl, __msg, ##__args); +#else /* CONFIG_RT2X00_DEBUG */ +#define DEBUG_PRINTK(__dev, __kernlvl, __lvl, __msg, __args...) \ + do { } while (0) +#endif /* CONFIG_RT2X00_DEBUG */ + +/* + * Various debug levels. + * The debug levels PANIC and ERROR both indicate serious problems, + * for this reason they should never be ignored. + * The special ERROR_PROBE message is for messages that are generated + * when the rt2x00_dev is not yet initialized. + */ +#define PANIC(__dev, __msg, __args...) \ + DEBUG_PRINTK_MSG(__dev, KERN_CRIT, "Panic", __msg, ##__args) +#define ERROR(__dev, __msg, __args...) \ + DEBUG_PRINTK_MSG(__dev, KERN_ERR, "Error", __msg, ##__args) +#define ERROR_PROBE(__msg, __args...) \ + DEBUG_PRINTK_PROBE(KERN_ERR, "Error", __msg, ##__args) +#define WARNING(__dev, __msg, __args...) \ + DEBUG_PRINTK(__dev, KERN_WARNING, "Warning", __msg, ##__args) +#define NOTICE(__dev, __msg, __args...) \ + DEBUG_PRINTK(__dev, KERN_NOTICE, "Notice", __msg, ##__args) +#define INFO(__dev, __msg, __args...) \ + DEBUG_PRINTK(__dev, KERN_INFO, "Info", __msg, ##__args) +#define DEBUG(__dev, __msg, __args...) \ + DEBUG_PRINTK(__dev, KERN_DEBUG, "Debug", __msg, ##__args) +#define EEPROM(__dev, __msg, __args...) \ + DEBUG_PRINTK(__dev, KERN_DEBUG, "EEPROM recovery", __msg, ##__args) + +/* + * Ring sizes. + * Ralink PCI devices demand the Frame size to be a multiple of 128 bytes. + * DATA_FRAME_SIZE is used for TX, RX, ATIM and PRIO rings. + * MGMT_FRAME_SIZE is used for the BEACON ring. + */ +#define DATA_FRAME_SIZE 2432 +#define MGMT_FRAME_SIZE 256 + +/* + * Number of entries in a packet ring. + */ +#define RX_ENTRIES 12 +#define TX_ENTRIES 12 +#define ATIM_ENTRIES 1 +#define BEACON_ENTRIES 1 + +/* + * Standard timing and size defines. + */ +#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 + (8 * (IEEE80211_HEADER + ACK_SIZE)) ) + +/* + * IEEE802.11 header defines + */ +#define is_rts_frame(__fc) \ + ( !!((((__fc) & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) && \ + (((__fc) & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_RTS)) ) +#define is_cts_frame(__fc) \ + ( !!((((__fc) & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) && \ + (((__fc) & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_CTS)) ) +#define is_probe_resp(__fc) \ + ( !!((((__fc) & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) && \ + (((__fc) & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP)) ) + +/* + * Interval defines + */ +#define LINK_TUNE_INTERVAL ( 1 * HZ ) +#define RFKILL_POLL_INTERVAL ( HZ / 4 ) + +/* + * TX result flags. + */ +enum TX_STATUS { + TX_SUCCESS = 0, + TX_SUCCESS_RETRY = 1, + TX_FAIL_RETRY = 2, + TX_FAIL_INVALID = 3, + TX_FAIL_OTHER = 4, +}; + +/* + * Antenna values + */ +enum antenna { + ANTENNA_DIVERSITY = 0, + ANTENNA_A = 1, + ANTENNA_B = 2, +}; + +/* + * Led mode values. + */ +enum led_mode { + LED_MODE_DEFAULT = 0, + LED_MODE_TXRX_ACTIVITY = 1, + LED_MODE_SIGNAL_STRENGTH = 2, + LED_MODE_ASUS = 3, + LED_MODE_ALPHA = 4, +}; + +/* + * Device states + */ +enum dev_state { + STATE_DEEP_SLEEP = 0, + STATE_SLEEP = 1, + STATE_STANDBY = 2, + STATE_AWAKE = 3, + +/* + * Additional device states, these values are + * not strict since they are not directly passed + * into the device. + */ + STATE_RADIO_ON, + STATE_RADIO_OFF, + STATE_RADIO_RX_ON, + STATE_RADIO_RX_OFF, +}; + +/* + * IFS backoff values + */ +enum ifs { + IFS_BACKOFF = 0, + IFS_SIFS = 1, + IFS_NEW_BACKOFF = 2, + IFS_NONE = 3, +}; + +/* + * Cipher types for hardware encryption + */ +enum cipher { + CIPHER_NONE = 0, + CIPHER_WEP64 = 1, + CIPHER_WEP128 = 2, + CIPHER_TKIP = 3, + CIPHER_AES = 4, +/* + * The following fields were added by rt61pci and rt73usb. + */ + CIPHER_CKIP64 = 5, + CIPHER_CKIP128 = 6, + CIPHER_TKIP_NO_MIC = 7, +}; + +/* + * Register handlers. + * We store the position of a register field inside a field structure, + * This will simplify the process of setting and reading a certain field + * inside the register while making sure the process remains byte order safe. + */ +struct rt2x00_field8 { + u8 bit_offset; + u8 bit_mask; +}; + +struct rt2x00_field16 { + u16 bit_offset; + u16 bit_mask; +}; + +struct rt2x00_field32 { + u32 bit_offset; + u32 bit_mask; +}; + +/* + * Power of two check from Linus Torvalds, + * this will check if the mask that has been + * given contains and contiguous set of bits. + */ +#define is_power_of_two(x) ( !((x) & ((x)-1)) ) +#define low_bit_mask(x) ( ((x)-1) & ~(x) ) +#define is_valid_mask(x) is_power_of_two(1 + (x) + low_bit_mask(x)) + +#define FIELD8(__mask) \ +({ \ + BUILD_BUG_ON(!(__mask) || \ + !is_valid_mask(__mask) || \ + (__mask) != (u8)(__mask)); \ + (struct rt2x00_field8) { \ + __ffs(__mask), (__mask) \ + }; \ +}) + +#define FIELD16(__mask) \ +({ \ + BUILD_BUG_ON(!(__mask) || \ + !is_valid_mask(__mask) || \ + (__mask) != (u16)(__mask));\ + (struct rt2x00_field16) { \ + __ffs(__mask), (__mask) \ + }; \ +}) + +#define FIELD32(__mask) \ +({ \ + BUILD_BUG_ON(!(__mask) || \ + !is_valid_mask(__mask) || \ + (__mask) != (u32)(__mask));\ + (struct rt2x00_field32) { \ + __ffs(__mask), (__mask) \ + }; \ +}) + +static inline void rt2x00_set_field32(u32 *reg, + const struct rt2x00_field32 field, const u32 value) +{ + *reg &= ~(field.bit_mask); + *reg |= (value << field.bit_offset) & field.bit_mask; +} + +static inline u32 rt2x00_get_field32(const u32 reg, + const struct rt2x00_field32 field) +{ + return (reg & field.bit_mask) >> field.bit_offset; +} + +static inline void rt2x00_set_field16(u16 *reg, + const struct rt2x00_field16 field, const u16 value) +{ + *reg &= ~(field.bit_mask); + *reg |= (value << field.bit_offset) & field.bit_mask; +} + +static inline u16 rt2x00_get_field16(const u16 reg, + const struct rt2x00_field16 field) +{ + return (reg & field.bit_mask) >> field.bit_offset; +} + +static inline void rt2x00_set_field8(u8 *reg, + const struct rt2x00_field8 field, const u8 value) +{ + *reg &= ~(field.bit_mask); + *reg |= (value << field.bit_offset) & field.bit_mask; +} + +static inline u8 rt2x00_get_field8(const u8 reg, + const struct rt2x00_field8 field) +{ + return (reg & field.bit_mask) >> field.bit_offset; +} + +/* + * 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 0x0101 +#define RT2560 0x0201 +#define RT2570 0x1201 +#define RT2561 0x0301 +#define RT2561s 0x0302 +#define RT2661 0x0401 +#define RT2571 0x1300 + + u16 rf; + u32 rev; +}; + +/* + * data_desc + * Each data entry also contains a descriptor which is used by the + * device to determine what should be done with the packet and + * what the current status is. + * This structure is greatly simplified, but the descriptors + * are basically a list of little endian 32 bit values. + * Make the array by default 1 word big, this will allow us + * to use sizeof() correctly. + */ +struct data_desc { + __le32 word[1]; +}; + +/* + * data_entry_desc + * Summary of information that should be written into the + * descriptor for sending a TX frame. + */ +struct data_entry_desc { + /* + * PLCP values. + */ + u16 length_high; + u16 length_low; + u16 signal; + u16 service; + + int queue; + int ifs; +}; + +/* + * data_entry + * The data ring is a list of data entries. + * Each entry holds a reference to the descriptor + * and the data buffer. For TX rings the reference to the + * sk_buff of the packet being transmitted is also stored here. + */ +struct data_entry { + /* + * Status flags + */ + unsigned long flags; +#define ENTRY_OWNER_NIC 1 +#define ENTRY_TXDONE 2 +#define ENTRY_TXD_RTS_FRAME 3 +#define ENTRY_TXD_OFDM_RATE 4 +#define ENTRY_TXD_MORE_FRAG 5 +#define ENTRY_TXD_REQ_TIMESTAMP 6 +#define ENTRY_TXD_REQ_ACK 7 +#define ENTRY_TXD_NEW_SEQ 8 + + /* + * Ring we belong to. + */ + struct data_ring *ring; + + /* + * sk_buff for the packet which is being transmitted + * in this entry (Only used with TX related rings). + */ + struct sk_buff *skb; + + /* + * Store a ieee80211_tx_status structure in each + * ring entry, this will optimize the txdone + * handler. + */ + struct ieee80211_tx_status tx_status; + + /* + * private pointer specific to driver. + */ + void *priv; + + /* + * Data address for this entry. + */ + void *data_addr; + dma_addr_t data_dma; +}; + +/* + * data_ring + * Data rings are used by the device to send and receive packets. + * The data_addr is the base address of the data memory. + * To determine at which point in the ring we are, + * have to use the rt2x00_ring_index_*() functions. + */ +struct data_ring { + /* + * Pointer to main rt2x00dev structure where this + * ring belongs to. + */ + struct rt2x00_dev *rt2x00dev; + + /* + * Base address for the device specific data entries. + */ + struct data_entry *entry; + + /* + * TX queue statistic info. + */ + struct ieee80211_tx_queue_stats_data stats; + + /* + * TX Queue parameters. + */ + struct ieee80211_tx_queue_params tx_params; + + /* + * Base address for data ring. + */ + dma_addr_t data_dma; + void *data_addr; + + /* + * Index variables. + */ + u16 index; + u16 index_done; + + /* + * Size of packet and descriptor in bytes. + */ + u16 data_size; + u16 desc_size; +}; + +/* + * Handlers to determine the address of the current device specific + * data entry, where either index or index_done points to. + */ +static inline struct data_entry* rt2x00_get_data_entry( + struct data_ring *ring) +{ + return &ring->entry[ring->index]; +} + +static inline struct data_entry* rt2x00_get_data_entry_done( + struct data_ring *ring) +{ + return &ring->entry[ring->index_done]; +} + +/* + * Total ring memory + */ +static inline int rt2x00_get_ring_size(struct data_ring *ring) +{ + return ring->stats.limit * (ring->desc_size + ring->data_size); +} + +/* + * Ring index manipulation functions. + */ +static inline void rt2x00_ring_index_inc(struct data_ring *ring) +{ + ring->index++; + if (ring->index >= ring->stats.limit) + ring->index = 0; + ring->stats.len++; +} + +static inline void rt2x00_ring_index_done_inc(struct data_ring *ring) +{ + ring->index_done++; + if (ring->index_done >= ring->stats.limit) + ring->index_done = 0; + ring->stats.len--; + ring->stats.count++; +} + +static inline void rt2x00_ring_index_clear(struct data_ring *ring) +{ + ring->index = 0; + ring->index_done = 0; + ring->stats.len = 0; + ring->stats.count = 0; +} + +static inline int rt2x00_ring_empty(struct data_ring *ring) +{ + return ring->stats.len == 0; +} + +static inline int rt2x00_ring_full(struct data_ring *ring) +{ + return ring->stats.len == ring->stats.limit; +} + +static inline int rt2x00_ring_free(struct data_ring *ring) +{ + if (ring->index_done >= ring->index) + return ring->index_done - ring->index; + return ring->stats.len - (ring->index - ring->index_done); +} + +/* + * TX/RX Descriptor access functions. + */ +static inline void rt2x00_desc_read(struct data_desc *desc, + const u8 word, u32 *value) +{ + *value = le32_to_cpu(desc->word[word]); +} + +static inline void rt2x00_desc_write(struct data_desc *desc, + const u8 word, const u32 value) +{ + desc->word[word] = cpu_to_le32(value); +} + +/* + * 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; + + /* + * RSSI statistics. + */ + u32 count_rssi; + u32 total_rssi; + + /* + * Misc statistics. + */ + u32 curr_noise; + u32 false_cca; + + /* + * Work structure for scheduling periodic link tuning. + */ + struct delayed_work work; +}; + +/* + * Interface structure + * Configuration details about the current interface. + */ +struct interface { + /* + * Interface identification. The value is assigned + * to us by the 80211 stack, and is used to request + * new beacons. + */ + int id; + + /* + * Current working type (IEEE80211_IF_TYPE_*). + * This excludes the type IEEE80211_IF_TYPE_MNTR + * since that is counted seperately in the monitor_count + * field. + */ + int type; + + /* + * BBSID of the AP to associate with. + */ + u8 bssid[ETH_ALEN]; + + /* + * Store the promisc mode for the current interface. + * monitor mode always forces promisc mode to be enabled, + * so we need to store the promisc mode seperately. + */ + short promisc; + + /* + * Monitor mode count, the number of interfaces + * in monitor mode that that have been added. + */ + short monitor_count; +}; + +static inline int is_interface_present(struct interface *intf) +{ + return !!intf->id; +} + +static inline int is_monitor_present(struct interface *intf) +{ + return !!intf->monitor_count; +} + +/* + * rt2x00lib callback functions. + */ +struct rt2x00lib_ops { + /* + * Interrupt handlers. + */ + irq_handler_t irq_handler; + + /* + * Device init handlers. + */ + int (*init_hw)(struct rt2x00_dev *rt2x00dev); + char* (*get_fw_name)(struct rt2x00_dev *rt2x00dev); + int (*load_firmware)(struct rt2x00_dev *rt2x00dev, void *data, + const size_t len); + + /* + * Device initialization/deinitialization handlers. + */ + int (*initialize)(struct rt2x00_dev *rt2x00dev); + void (*uninitialize)(struct rt2x00_dev *rt2x00dev); + + /* + * Radio control handlers. + */ + int (*set_device_state)(struct rt2x00_dev *rt2x00dev, + enum dev_state state); + int (*rfkill_poll)(struct rt2x00_dev *rt2x00dev); + void (*link_tuner)(struct rt2x00_dev *rt2x00dev, int rssi); + + /* + * TX control handlers + */ + void (*write_tx_desc)(struct rt2x00_dev *rt2x00dev, + struct data_entry *entry, struct data_desc *txd, + struct data_entry_desc *desc, + struct ieee80211_hdr *ieee80211hdr, unsigned int length, + struct ieee80211_tx_control *control); + int (*write_tx_data)(struct rt2x00_dev *rt2x00dev, + struct data_ring *ring, struct sk_buff *skb, + struct ieee80211_tx_control *control); + void (*kick_tx_queue)(struct rt2x00_dev *rt2x00dev, int queue); + + /* + * Configuration handlers. + */ + void (*config_type)(struct rt2x00_dev *rt2x00dev, const int type); + void (*config_phymode)(struct rt2x00_dev *rt2x00dev, const int phy); + void (*config_channel)(struct rt2x00_dev *rt2x00dev, const int value, + const int channel, const int txpower); + void (*config_mac_addr)(struct rt2x00_dev *rt2x00dev, u8 *mac); + void (*config_bssid)(struct rt2x00_dev *rt2x00dev, u8 *bssid); + void (*config_promisc)(struct rt2x00_dev *rt2x00dev, const int promisc); + void (*config_txpower)(struct rt2x00_dev *rt2x00dev, const int txpower); + void (*config_antenna)(struct rt2x00_dev *rt2x00dev, + const int antenna_tx, const int antenna_rx); + void (*config_duration)(struct rt2x00_dev *rt2x00dev, + const int short_slot_time, const int beacon_int); +}; + +/* + * rt2x00 driver callback operation structure. + */ +struct rt2x00_ops { + const char *name; + const unsigned int rxd_size; + const unsigned int txd_size; + const struct rt2x00lib_ops *lib; + const struct ieee80211_ops *hw; +#ifdef CONFIG_RT2X00_LIB_DEBUGFS + const struct rt2x00debug *debugfs; +#endif /* CONFIG_RT2X00_LIB_DEBUGFS */ +}; + +/* + * 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} + * macro's should be used for correct typecasting. + */ + void *dev; + struct device *device; +#define rt2x00dev_pci(__dev) ( (struct pci_dev*)(__dev)->dev ) +#define rt2x00dev_usb(__dev) ( (struct usb_interface*)(__dev)->dev ) + + /* + * Callback functions. + */ + const struct rt2x00_ops *ops; + + /* + * IEEE80211 control structure. + */ + struct ieee80211_hw *hw; + struct ieee80211_hw_mode *hwmodes; + unsigned int curr_hwmode; +#define HWMODE_B 0 +#define HWMODE_G 1 +#define HWMODE_A 2 + + /* + * rfkill structure for RF state switching support. + * This will only be compiled in when required. + */ +#ifdef CONFIG_RT2X00_LIB_RFKILL + struct rfkill *rfkill; + struct delayed_work rfkill_work; +#endif /* CONFIG_RT2X00_LIB_RFKILL */ + + /* + * Device flags. + * In these flags the current status and some + * of the device capabilities are stored. + */ + unsigned long flags; +#define DEVICE_ENABLED_RADIO 1 +#define DEVICE_ENABLED_RADIO_HW 2 +#define DEVICE_INITIALIZED 3 +#define DEVICE_INITIALIZED_HW 4 +#define FIRMWARE_REQUIRED 5 +#define FIRMWARE_LOADED 6 +#define FIRMWARE_FAILED 7 +#define INTERFACE_ENABLED 8 +#define INTERFACE_ENABLED_MONITOR 9 +#define INTERFACE_ENABLED_PROMISC 10 +#define DEVICE_SUPPORT_ATIM 11 +#define DEVICE_SUPPORT_HW_BUTTON 12 +#define CONFIG_FRAME_TYPE 13 +#define CONFIG_RF_SEQUENCE 14 +#define CONFIG_EXTERNAL_LNA 15 +#define CONFIG_EXTERNAL_LNA_A 16 +#define CONFIG_EXTERNAL_LNA_BG 17 +#define CONFIG_DOUBLE_ANTENNA 18 +#define CONFIG_DISABLE_LINK_TUNING 19 + + /* + * Chipset identification. + */ + struct rt2x00_chip chip; + + /* + * hw capability specifications. + */ + struct hw_mode_spec spec; + + /* + * Base address of device registers (PCI devices only). + */ + void __iomem *csr_addr; + + /* + * If enabled, the debugfs interface structures + * required for deregistration of debugfs. + */ + const struct rt2x00debug_intf *debugfs_intf; + + /* + * Queue for deferred work. + */ + struct workqueue_struct *workqueue; + + /* + * Interface configuration. + */ + struct interface interface; + + /* + * Link quality + */ + struct link link; + + /* + * EEPROM data. + */ + __le16 *eeprom; + + /* + * Active RF register values. + * These are stored here for easier working + * with the rf registers. + */ + u32 rf1; + u32 rf2; + u32 rf3; + u32 rf4; + + /* + * Current TX power value. + */ + u16 tx_power; + + /* + * LED register (for rt61pci & rt73usb). + */ + u16 led_reg; + + /* + * Led mode (LED_MODE_*) + */ + u8 led_mode; + + /* + * EEPROM bus width (PCI devices only). + */ + u8 eeprom_width; + + /* + * Frequency offset (for rt61pci & rt73usb). + */ + u8 freq_offset; + + /* + * Low level statistics which will have + * to be kept up to date while device is running. + */ + struct ieee80211_low_level_stats low_level_stats; + + /* + * RX configuration information. + */ + struct ieee80211_rx_status rx_status; + + /* + * Data ring arrays for RX, TX and Beacon. + * The Beacon array also contains the Atim ring + * if that is supported by the device. + */ + struct data_ring *rx; + struct data_ring *tx; + struct data_ring *bcn; +}; + +static inline struct data_ring* rt2x00_get_ring( + struct rt2x00_dev *rt2x00dev, const unsigned int queue) +{ + int atim = test_bit(DEVICE_SUPPORT_ATIM, &rt2x00dev->flags); + + /* + * Check if the rings have been allocated. + */ + if (!rt2x00dev->tx || !rt2x00dev->bcn) + return NULL; + + /* + * 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) + return &rt2x00dev->tx[queue]; + else if (queue == IEEE80211_TX_QUEUE_BEACON) + return &rt2x00dev->bcn[0]; + else if (queue == IEEE80211_TX_QUEUE_AFTER_BEACON && atim) + return &rt2x00dev->bcn[1]; + + return NULL; +} + +/* + * For-each loop for the ring array. + * Since the all rings are allocated as a single array, + * we can start at the rx pointer and move forward to the tx rings. + * The 1 + Atim check will assure that the address directly after + * the ring array is obtained and the for-each loop exits correctly. + */ +#define ring_for_each(__dev, __entry) \ + for ((__entry) = (__dev)->rx; \ + (__entry) != &(__dev)->bcn[1 + \ + test_bit(DEVICE_SUPPORT_ATIM, &rt2x00dev->flags)]; \ + (__entry)++) + +#define txring_for_each(__dev, __entry) \ + for ((__entry) = (__dev)->tx; (__entry) != (__dev)->bcn; (__entry)++) + +/* + * EEPROM access. + * The EEPROM is being accessed by word index. + */ +static inline void* rt2x00_eeprom_addr(const struct rt2x00_dev *rt2x00dev, + const u8 word) +{ + return (void*)&rt2x00dev->eeprom[word]; +} + +static inline void rt2x00_eeprom_read(const struct rt2x00_dev *rt2x00dev, + const u8 word, u16 *data) +{ + *data = le16_to_cpu(rt2x00dev->eeprom[word]); +} + +static inline void rt2x00_eeprom_write(const struct rt2x00_dev *rt2x00dev, + const u8 word, u16 data) +{ + rt2x00dev->eeprom[word] = cpu_to_le16(data); +} + +/* + * Link tuning handlers + */ +static inline void rt2x00_start_link_tune(struct rt2x00_dev *rt2x00dev) +{ + rt2x00dev->link.count = 0; + rt2x00dev->link.count_rssi = 0; + rt2x00dev->link.total_rssi = 0; + rt2x00dev->link.curr_noise = 0; + + queue_delayed_work(rt2x00dev->workqueue, + &rt2x00dev->link.work, LINK_TUNE_INTERVAL); +} + +static inline void rt2x00_stop_link_tune(struct rt2x00_dev *rt2x00dev) +{ + if (work_pending(&rt2x00dev->link.work.work)) + cancel_rearming_delayed_workqueue( + rt2x00dev->workqueue, &rt2x00dev->link.work); +} + +static inline void rt2x00_update_link_rssi(struct link *link, u32 rssi) +{ + link->count_rssi++; + link->total_rssi += rssi; +} + +static inline u32 rt2x00_get_link_rssi(struct link *link) +{ + u32 average = 0; + + if (link->count_rssi && link->total_rssi) + average = link->total_rssi / link->count_rssi; + + link->count_rssi = 0; + link->total_rssi = 0; + + return average; +} + +/* + * Chipset handlers + */ +static inline void rt2x00_set_chip(struct rt2x00_dev *rt2x00dev, + const u16 rt, const u16 rf, const u32 rev) +{ + INFO(rt2x00dev, + "Chipset detected - rt: %04x, rf: %04x, rev: %08x.\n", + rt, rf, rev); + + rt2x00dev->chip.rt = rt; + rt2x00dev->chip.rf = rf; + rt2x00dev->chip.rev = rev; +} + +static inline char rt2x00_rt(const struct rt2x00_chip *chipset, const u16 chip) +{ + return (chipset->rt == chip); +} + +static inline char rt2x00_rf(const struct rt2x00_chip *chipset, const u16 chip) +{ + return (chipset->rf == chip); +} + +static inline u16 rt2x00_rev(const struct rt2x00_chip *chipset) +{ + return chipset->rev; +} + +/* + * Device specific rate value. + * We will have to create the device specific rate value + * passed to the ieee80211 kernel. We need to make it a consist of + * multiple fields because we want to store more then 1 device specific + * values inside the value. + * 1 - rate, stored as 100 kbit/s. + * 2 - preamble, short_preamble enabled flag. + * 3 - MASK_RATE, which rates are enabled in this mode, this mask + * corresponds with the TX register format for the current device. + * 4 - plcp, 802.11b rates are device specific, + * 802.11g rates are set according to the ieee802.11a-1999 p.14. + * The bit to enable preamble is set in a seperate define. + */ +#define DEV_RATE FIELD32(0x000007ff) +#define DEV_PREAMBLE FIELD32(0x00000800) +#define DEV_RATEMASK FIELD32(0x00fff000) +#define DEV_PLCP FIELD32(0xff000000) + +/* + * Bitmask for MASK_RATE + */ +#define DEV_RATE_1MB 0x00000001 +#define DEV_RATE_2MB 0x00000002 +#define DEV_RATE_5_5MB 0x00000004 +#define DEV_RATE_11MB 0x00000008 +#define DEV_RATE_6MB 0x00000010 +#define DEV_RATE_9MB 0x00000020 +#define DEV_RATE_12MB 0x00000040 +#define DEV_RATE_18MB 0x00000080 +#define DEV_RATE_24MB 0x00000100 +#define DEV_RATE_36MB 0x00000200 +#define DEV_RATE_48MB 0x00000400 +#define DEV_RATE_54MB 0x00000800 + +/* + * Bitmask groups of bitrates + */ +#define DEV_BASIC_RATE \ + ( DEV_RATE_1MB | DEV_RATE_2MB | DEV_RATE_5_5MB | DEV_RATE_11MB | \ + DEV_RATE_6MB | DEV_RATE_12MB | DEV_RATE_24MB ) + +#define DEV_CCK_RATE \ + ( DEV_RATE_1MB | DEV_RATE_2MB | DEV_RATE_5_5MB | DEV_RATE_11MB ) + +#define DEV_OFDM_RATE \ + ( DEV_RATE_6MB | DEV_RATE_9MB | DEV_RATE_12MB | DEV_RATE_18MB | \ + DEV_RATE_24MB | DEV_RATE_36MB | DEV_RATE_48MB | DEV_RATE_54MB ) + +/* + * Macro's to set and get specific fields from the device specific val and val2 + * fields inside the ieee80211_rate entry. + */ +#define DEVICE_SET_RATE_FIELD(__value, __mask) \ + (int)( ((__value) << DEV_##__mask.bit_offset) & DEV_##__mask.bit_mask ) + +#define DEVICE_GET_RATE_FIELD(__value, __mask) \ + (int)( ((__value) & DEV_##__mask.bit_mask) >> DEV_##__mask.bit_offset ) + +/* + * 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. + */ +static inline u16 get_duration(const unsigned int size, const u8 rate) +{ + return ((size * 8 * 10) / rate); +} + +static inline u16 get_duration_res(const unsigned int size, const u8 rate) +{ + return ((size * 8 * 10) % rate); +} + +#endif /* RT2X00_H */ |