1 files changed, 250 insertions, 0 deletions

diff --git a/drivers/net/wireless/brcm80211/brcmsmac/rate.h b/drivers/net/wireless/brcm80211/brcmsmac/rate.h
new file mode 100644
index 000000000000..e7b9dc2f2731
--- /dev/null
+++ b/drivers/net/wireless/brcm80211/brcmsmac/rate.h
@@ -0,0 +1,250 @@
+/*
+ * Copyright (c) 2010 Broadcom Corporation
+ *
+ * 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 _BRCM_RATE_H_
+#define _BRCM_RATE_H_
+
+#include "types.h"
+#include "d11.h"
+
+extern const u8 rate_info[];
+extern const struct brcms_c_rateset cck_ofdm_mimo_rates;
+extern const struct brcms_c_rateset ofdm_mimo_rates;
+extern const struct brcms_c_rateset cck_ofdm_rates;
+extern const struct brcms_c_rateset ofdm_rates;
+extern const struct brcms_c_rateset cck_rates;
+extern const struct brcms_c_rateset gphy_legacy_rates;
+extern const struct brcms_c_rateset rate_limit_1_2;
+
+struct brcms_mcs_info {
+        /* phy rate in kbps [20Mhz] */
+        u32 phy_rate_20;
+        /* phy rate in kbps [40Mhz] */
+        u32 phy_rate_40;
+        /* phy rate in kbps [20Mhz] with SGI */
+        u32 phy_rate_20_sgi;
+        /* phy rate in kbps [40Mhz] with SGI */
+        u32 phy_rate_40_sgi;
+        /* phy ctl byte 3, code rate, modulation type, # of streams */
+        u8 tx_phy_ctl3;
+        /* matching legacy ofdm rate in 500bkps */
+        u8 leg_ofdm;
+};
+
+#define BRCMS_MAXMCS    32      /* max valid mcs index */
+#define MCS_TABLE_SIZE  33      /* Number of mcs entries in the table */
+extern const struct brcms_mcs_info mcs_table[];
+
+#define MCS_TXS_MASK    0xc0    /* num tx streams - 1 bit mask */
+#define MCS_TXS_SHIFT   6       /* num tx streams - 1 bit shift */
+
+/* returns num tx streams - 1 */
+static inline u8 mcs_2_txstreams(u8 mcs)
+{
+        return (mcs_table[mcs].tx_phy_ctl3 & MCS_TXS_MASK) >> MCS_TXS_SHIFT;
+}
+
+static inline uint mcs_2_rate(u8 mcs, bool is40, bool sgi)
+{
+        if (sgi) {
+                if (is40)
+                        return mcs_table[mcs].phy_rate_40_sgi;
+                return mcs_table[mcs].phy_rate_20_sgi;
+        }
+        if (is40)
+                return mcs_table[mcs].phy_rate_40;
+
+        return mcs_table[mcs].phy_rate_20;
+}
+
+/* Macro to use the rate_info table */
+#define BRCMS_RATE_MASK_FULL 0xff /* Rate value mask with basic rate flag */
+
+/*
+ * rate spec : holds rate and mode specific information required to generate a
+ * tx frame. Legacy CCK and OFDM information is held in the same manner as was
+ * done in the past (in the lower byte) the upper 3 bytes primarily hold MIMO
+ * specific information
+ */
+
+/* rate spec bit fields */
+
+/* Either 500Kbps units or MIMO MCS idx */
+#define RSPEC_RATE_MASK         0x0000007F
+/* mimo MCS is stored in RSPEC_RATE_MASK */
+#define RSPEC_MIMORATE          0x08000000
+/* mimo bw mask */
+#define RSPEC_BW_MASK           0x00000700
+/* mimo bw shift */
+#define RSPEC_BW_SHIFT          8
+/* mimo Space/Time/Frequency mode mask */
+#define RSPEC_STF_MASK          0x00003800
+/* mimo Space/Time/Frequency mode shift */
+#define RSPEC_STF_SHIFT         11
+/* mimo coding type mask */
+#define RSPEC_CT_MASK           0x0000C000
+/* mimo coding type shift */
+#define RSPEC_CT_SHIFT          14
+/* mimo num STC streams per PLCP defn. */
+#define RSPEC_STC_MASK          0x00300000
+/* mimo num STC streams per PLCP defn. */
+#define RSPEC_STC_SHIFT         20
+/* mimo bit indicates adv coding in use */
+#define RSPEC_LDPC_CODING       0x00400000
+/* mimo bit indicates short GI in use */
+#define RSPEC_SHORT_GI          0x00800000
+/* bit indicates override both rate & mode */
+#define RSPEC_OVERRIDE          0x80000000
+/* bit indicates override rate only */
+#define RSPEC_OVERRIDE_MCS_ONLY 0x40000000
+
+static inline bool rspec_active(u32 rspec)
+{
+        return rspec & (RSPEC_RATE_MASK | RSPEC_MIMORATE);
+}
+
+static inline u8 rspec_phytxbyte2(u32 rspec)
+{
+        return (rspec & 0xff00) >> 8;
+}
+
+static inline u32 rspec_get_bw(u32 rspec)
+{
+        return (rspec & RSPEC_BW_MASK) >> RSPEC_BW_SHIFT;
+}
+
+static inline bool rspec_issgi(u32 rspec)
+{
+        return (rspec & RSPEC_SHORT_GI) == RSPEC_SHORT_GI;
+}
+
+static inline bool rspec_is40mhz(u32 rspec)
+{
+        u32 bw = rspec_get_bw(rspec);
+
+        return bw == PHY_TXC1_BW_40MHZ || bw == PHY_TXC1_BW_40MHZ_DUP;
+}
+
+static inline uint rspec2rate(u32 rspec)
+{
+        if (rspec & RSPEC_MIMORATE)
+                return mcs_2_rate(rspec & RSPEC_RATE_MASK, rspec_is40mhz(rspec),
+                                  rspec_issgi(rspec));
+        return rspec & RSPEC_RATE_MASK;
+}
+
+static inline u8 rspec_mimoplcp3(u32 rspec)
+{
+        return (rspec & 0xf00000) >> 16;
+}
+
+static inline bool plcp3_issgi(u8 plcp)
+{
+        return (plcp & (RSPEC_SHORT_GI >> 16)) != 0;
+}
+
+static inline uint rspec_stc(u32 rspec)
+{
+        return (rspec & RSPEC_STC_MASK) >> RSPEC_STC_SHIFT;
+}
+
+static inline uint rspec_stf(u32 rspec)
+{
+        return (rspec & RSPEC_STF_MASK) >> RSPEC_STF_SHIFT;
+}
+
+static inline bool is_mcs_rate(u32 ratespec)
+{
+        return (ratespec & RSPEC_MIMORATE) != 0;
+}
+
+static inline bool is_ofdm_rate(u32 ratespec)
+{
+        return !is_mcs_rate(ratespec) &&
+               (rate_info[ratespec & RSPEC_RATE_MASK] & BRCMS_RATE_FLAG);
+}
+
+static inline bool is_cck_rate(u32 ratespec)
+{
+        u32 rate = (ratespec & BRCMS_RATE_MASK);
+
+        return !is_mcs_rate(ratespec) && (
+                        rate == BRCM_RATE_1M || rate == BRCM_RATE_2M ||
+                        rate == BRCM_RATE_5M5 || rate == BRCM_RATE_11M);
+}
+
+static inline bool is_single_stream(u8 mcs)
+{
+        return mcs <= HIGHEST_SINGLE_STREAM_MCS || mcs == 32;
+}
+
+static inline u8 cck_rspec(u8 cck)
+{
+        return cck & RSPEC_RATE_MASK;
+}
+
+/* Convert encoded rate value in plcp header to numerical rates in 500 KHz
+ * increments */
+extern const u8 ofdm_rate_lookup[];
+
+static inline u8 ofdm_phy2mac_rate(u8 rlpt)
+{
+        return ofdm_rate_lookup[rlpt & 0x7];
+}
+
+static inline u8 cck_phy2mac_rate(u8 signal)
+{
+        return signal/5;
+}
+
+/* Rates specified in brcms_c_rateset_filter() */
+#define BRCMS_RATES_CCK_OFDM    0
+#define BRCMS_RATES_CCK         1
+#define BRCMS_RATES_OFDM                2
+
+/* sanitize, and sort a rateset with the basic bit(s) preserved, validate
+ * rateset */
+extern bool
+brcms_c_rate_hwrs_filter_sort_validate(struct brcms_c_rateset *rs,
+                                       const struct brcms_c_rateset *hw_rs,
+                                       bool check_brate, u8 txstreams);
+/* copy rateset src to dst as-is (no masking or sorting) */
+extern void brcms_c_rateset_copy(const struct brcms_c_rateset *src,
+                             struct brcms_c_rateset *dst);
+
+/* would be nice to have these documented ... */
+extern u32 brcms_c_compute_rspec(struct d11rxhdr *rxh, u8 *plcp);
+
+extern void brcms_c_rateset_filter(struct brcms_c_rateset *src,
+        struct brcms_c_rateset *dst, bool basic_only, u8 rates, uint xmask,
+        bool mcsallow);
+
+extern void
+brcms_c_rateset_default(struct brcms_c_rateset *rs_tgt,
+                        const struct brcms_c_rateset *rs_hw, uint phy_type,
+                        int bandtype, bool cck_only, uint rate_mask,
+                        bool mcsallow, u8 bw, u8 txstreams);
+
+extern s16 brcms_c_rate_legacy_phyctl(uint rate);
+
+extern void brcms_c_rateset_mcs_upd(struct brcms_c_rateset *rs, u8 txstreams);
+extern void brcms_c_rateset_mcs_clear(struct brcms_c_rateset *rateset);
+extern void brcms_c_rateset_mcs_build(struct brcms_c_rateset *rateset,
+                                      u8 txstreams);
+extern void brcms_c_rateset_bw_mcs_filter(struct brcms_c_rateset *rateset,
+                                          u8 bw);
+
+#endif                          /* _BRCM_RATE_H_ */