ath.h

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/*
 * Copyright (c) 2008-2009 Atheros Communications Inc.
 *
 * Modified for iPXE by Scott K Logan <logans@cottsay.net> July 2011
 * Original from Linux kernel 3.0.1
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef ATH_H
#define ATH_H

FILE_LICENCE ( BSD2 );

#include <unistd.h>
#include <string.h>
#include <ipxe/net80211.h>

/* This block of functions are from kernel.h v3.0.1 */
#define DIV_ROUND_UP(n,d)       (((n) + (d) - 1) / (d))
#define BITS_PER_BYTE           8
#define BITS_TO_LONGS(nr)       DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
#define BIT(nr)                 (1UL << (nr))

#define min(x, y) ({                                    \
        typeof(x) _min1 = (x);                          \
        typeof(y) _min2 = (y);                          \
        (void) (&_min1 == &_min2);                      \
        _min1 < _min2 ? _min1 : _min2; })
#define max(x, y) ({                                    \
        typeof(x) _max1 = (x);                          \
        typeof(y) _max2 = (y);                          \
        (void) (&_max1 == &_max2);                      \
        _max1 > _max2 ? _max1 : _max2; })
#define abs(x) ({                                       \
                long ret;                               \
                if (sizeof(x) == sizeof(long)) {        \
                        long __x = (x);                 \
                        ret = (__x < 0) ? -__x : __x;   \
                } else {                                \
                        int __x = (x);                  \
                        ret = (__x < 0) ? -__x : __x;   \
                }                                       \
                ret;                                    \
        })

#define ___constant_swab16(x) ((uint16_t)(                      \
        (((uint16_t)(x) & (uint16_t)0x00ffU) << 8) |            \
        (((uint16_t)(x) & (uint16_t)0xff00U) >> 8)))
#define ___constant_swab32(x) ((uint32_t)(                      \
        (((uint32_t)(x) & (uint32_t)0x000000ffUL) << 24) |      \
        (((uint32_t)(x) & (uint32_t)0x0000ff00UL) <<  8) |      \
        (((uint32_t)(x) & (uint32_t)0x00ff0000UL) >>  8) |      \
        (((uint32_t)(x) & (uint32_t)0xff000000UL) >> 24)))
#define __swab16(x) ___constant_swab16(x)
#define __swab32(x) ___constant_swab32(x)
#define swab16 __swab16
#define swab32 __swab32

static inline int32_t sign_extend32(uint32_t value, int index)
{
        uint8_t shift = 31 - index;
        return (int32_t)(value << shift) >> shift;
}

static inline u16 __get_unaligned_le16(const u8 *p)
{
        return p[0] | p[1] << 8;
}
static inline u32 __get_unaligned_le32(const u8 *p)
{
        return p[0] | p[1] << 8 | p[2] << 16 | p[3] << 24;
}
static inline u16 get_unaligned_le16(const void *p)
{
        return __get_unaligned_le16((const u8 *)p);
}
static inline u32 get_unaligned_le32(const void *p)
{
        return __get_unaligned_le32((const u8 *)p);
}
/* End Kernel Block */

/*
 * The key cache is used for h/w cipher state and also for
 * tracking station state such as the current tx antenna.
 * We also setup a mapping table between key cache slot indices
 * and station state to short-circuit node lookups on rx.
 * Different parts have different size key caches.  We handle
 * up to ATH_KEYMAX entries (could dynamically allocate state).
 */
#define ATH_KEYMAX              128     /* max key cache size we handle */

struct ath_ani {
        int caldone;
        unsigned int longcal_timer;
        unsigned int shortcal_timer;
        unsigned int resetcal_timer;
        unsigned int checkani_timer;
        int timer;
};

struct ath_cycle_counters {
        u32 cycles;
        u32 rx_busy;
        u32 rx_frame;
        u32 tx_frame;
};

enum ath_device_state {
        ATH_HW_UNAVAILABLE,
        ATH_HW_INITIALIZED,
};

enum ath_bus_type {
        ATH_PCI,
        ATH_AHB,
        ATH_USB,
};

struct reg_dmn_pair_mapping {
        u16 regDmnEnum;
        u16 reg_5ghz_ctl;
        u16 reg_2ghz_ctl;
};

struct ath_regulatory {
        char alpha2[2];
        u16 country_code;
        u16 max_power_level;
        u32 tp_scale;
        u16 current_rd;
        u16 current_rd_ext;
        int16_t power_limit;
        struct reg_dmn_pair_mapping *regpair;
};

enum ath_crypt_caps {
        ATH_CRYPT_CAP_CIPHER_AESCCM             = BIT(0),
        ATH_CRYPT_CAP_MIC_COMBINED              = BIT(1),
};

struct ath_keyval {
        u8 kv_type;
        u8 kv_pad;
        u16 kv_len;
        u8 kv_val[16]; /* TK */
        u8 kv_mic[8]; /* Michael MIC key */
        u8 kv_txmic[8]; /* Michael MIC TX key (used only if the hardware
                         * supports both MIC keys in the same key cache entry;
                         * in that case, kv_mic is the RX key) */
};

enum ath_cipher {
        ATH_CIPHER_WEP = 0,
        ATH_CIPHER_AES_OCB = 1,
        ATH_CIPHER_AES_CCM = 2,
        ATH_CIPHER_CKIP = 3,
        ATH_CIPHER_TKIP = 4,
        ATH_CIPHER_CLR = 5,
        ATH_CIPHER_MIC = 127
};

/**
 * struct ath_ops - Register read/write operations
 *
 * @read: Register read
 * @multi_read: Multiple register read
 * @write: Register write
 * @enable_write_buffer: Enable multiple register writes
 * @write_flush: flush buffered register writes and disable buffering
 */
struct ath_ops {
        unsigned int (*read)(void *, u32 reg_offset);
        void (*multi_read)(void *, u32 *addr, u32 *val, u16 count);
        void (*write)(void *, u32 val, u32 reg_offset);
        void (*enable_write_buffer)(void *);
        void (*write_flush) (void *);
        u32 (*rmw)(void *, u32 reg_offset, u32 set, u32 clr);
};

struct ath_common;
struct ath_bus_ops;

struct ath_common {
        void *ah;
        void *priv;
        struct net80211_device *dev;
        int debug_mask;
        enum ath_device_state state;

        struct ath_ani ani;

        u16 cachelsz;
        u16 curaid;
        u8 macaddr[ETH_ALEN];
        u8 curbssid[ETH_ALEN];
        u8 bssidmask[ETH_ALEN];

        u8 tx_chainmask;
        u8 rx_chainmask;

        u32 rx_bufsize;

        u32 keymax;
        enum ath_crypt_caps crypt_caps;

        unsigned int clockrate;

        struct ath_cycle_counters cc_ani;
        struct ath_cycle_counters cc_survey;

        struct ath_regulatory regulatory;
        const struct ath_ops *ops;
        const struct ath_bus_ops *bus_ops;

        int btcoex_enabled;
};

void ath_hw_setbssidmask(struct ath_common *common);
int ath_hw_keyreset(struct ath_common *common, u16 entry);
void ath_hw_cycle_counters_update(struct ath_common *common);
int32_t ath_hw_get_listen_time(struct ath_common *common);

#endif /* ATH_H */