[B43LEGACY]: add mac80211-based driver for legacy BCM43xx devices

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 259 insertions, 0 deletions

diff --git a/drivers/net/wireless/b43legacy/xmit.h b/drivers/net/wireless/b43legacy/xmit.h
new file mode 100644
index 000000000000..8a155d0a5d1f
--- /dev/null
+++ b/drivers/net/wireless/b43legacy/xmit.h
@@ -0,0 +1,259 @@
+#ifndef B43legacy_XMIT_H_
+#define B43legacy_XMIT_H_
+
+#include "main.h"
+
+
+#define _b43legacy_declare_plcp_hdr(size)       \
+        struct b43legacy_plcp_hdr##size {       \
+                union {                         \
+                        __le32 data;            \
+                        __u8 raw[size];         \
+                } __attribute__((__packed__));  \
+        } __attribute__((__packed__))
+
+/* struct b43legacy_plcp_hdr4 */
+_b43legacy_declare_plcp_hdr(4);
+/* struct b43legacy_plcp_hdr6 */
+_b43legacy_declare_plcp_hdr(6);
+
+#undef _b43legacy_declare_plcp_hdr
+
+
+/* TX header for v3 firmware */
+struct b43legacy_txhdr_fw3 {
+        __le32 mac_ctl;                         /* MAC TX control */
+        __le16 mac_frame_ctl;                   /* Copy of the FrameControl */
+        __le16 tx_fes_time_norm;                /* TX FES Time Normal */
+        __le16 phy_ctl;                         /* PHY TX control */
+        __u8 iv[16];                            /* Encryption IV */
+        __u8 tx_receiver[6];                    /* TX Frame Receiver address */
+        __le16 tx_fes_time_fb;                  /* TX FES Time Fallback */
+        struct b43legacy_plcp_hdr4 rts_plcp_fb; /* RTS fallback PLCP */
+        __le16 rts_dur_fb;                      /* RTS fallback duration */
+        struct b43legacy_plcp_hdr4 plcp_fb;     /* Fallback PLCP */
+        __le16 dur_fb;                          /* Fallback duration */
+        PAD_BYTES(2);
+        __le16 cookie;
+        __le16 unknown_scb_stuff;
+        struct b43legacy_plcp_hdr6 rts_plcp;    /* RTS PLCP */
+        __u8 rts_frame[18];                     /* The RTS frame (if used) */
+        struct b43legacy_plcp_hdr6 plcp;
+} __attribute__((__packed__));
+
+/* MAC TX control */
+#define B43legacy_TX4_MAC_KEYIDX        0x0FF00000 /* Security key index */
+#define B43legacy_TX4_MAC_KEYIDX_SHIFT  20
+#define B43legacy_TX4_MAC_KEYALG        0x00070000 /* Security key algorithm */
+#define B43legacy_TX4_MAC_KEYALG_SHIFT  16
+#define B43legacy_TX4_MAC_LIFETIME      0x00001000
+#define B43legacy_TX4_MAC_FRAMEBURST    0x00000800
+#define B43legacy_TX4_MAC_SENDCTS       0x00000400
+#define B43legacy_TX4_MAC_AMPDU         0x00000300
+#define B43legacy_TX4_MAC_AMPDU_SHIFT   8
+#define B43legacy_TX4_MAC_CTSFALLBACKOFDM       0x00000200
+#define B43legacy_TX4_MAC_FALLBACKOFDM  0x00000100
+#define B43legacy_TX4_MAC_5GHZ          0x00000080
+#define B43legacy_TX4_MAC_IGNPMQ        0x00000020
+#define B43legacy_TX4_MAC_HWSEQ         0x00000010 /* Use Hardware Seq No */
+#define B43legacy_TX4_MAC_STMSDU        0x00000008 /* Start MSDU */
+#define B43legacy_TX4_MAC_SENDRTS       0x00000004
+#define B43legacy_TX4_MAC_LONGFRAME     0x00000002
+#define B43legacy_TX4_MAC_ACK           0x00000001
+
+/* Extra Frame Types */
+#define B43legacy_TX4_EFT_FBOFDM        0x0001 /* Data frame fb rate type */
+#define B43legacy_TX4_EFT_RTSOFDM       0x0004 /* RTS/CTS rate type */
+#define B43legacy_TX4_EFT_RTSFBOFDM     0x0010 /* RTS/CTS fallback rate type */
+
+/* PHY TX control word */
+#define B43legacy_TX4_PHY_OFDM          0x0001 /* Data frame rate type */
+#define B43legacy_TX4_PHY_SHORTPRMBL    0x0010 /* Use short preamble */
+#define B43legacy_TX4_PHY_ANT           0x03C0 /* Antenna selection */
+#define  B43legacy_TX4_PHY_ANT0         0x0000 /* Use antenna 0 */
+#define  B43legacy_TX4_PHY_ANT1         0x0100 /* Use antenna 1 */
+#define  B43legacy_TX4_PHY_ANTLAST      0x0300 /* Use last used antenna */
+
+
+
+void b43legacy_generate_txhdr(struct b43legacy_wldev *dev,
+                              u8 *txhdr,
+                              const unsigned char *fragment_data,
+                              unsigned int fragment_len,
+                              const struct ieee80211_tx_control *txctl,
+                              u16 cookie);
+
+
+/* Transmit Status */
+struct b43legacy_txstatus {
+        u16 cookie;     /* The cookie from the txhdr */
+        u16 seq;        /* Sequence number */
+        u8 phy_stat;    /* PHY TX status */
+        u8 frame_count; /* Frame transmit count */
+        u8 rts_count;   /* RTS transmit count */
+        u8 supp_reason; /* Suppression reason */
+        /* flags */
+        u8 pm_indicated;/* PM mode indicated to AP */
+        u8 intermediate;/* Intermediate status notification */
+        u8 for_ampdu;   /* Status is for an AMPDU (afterburner) */
+        u8 acked;       /* Wireless ACK received */
+};
+
+/* txstatus supp_reason values */
+enum {
+        B43legacy_TXST_SUPP_NONE,       /* Not suppressed */
+        B43legacy_TXST_SUPP_PMQ,        /* Suppressed due to PMQ entry */
+        B43legacy_TXST_SUPP_FLUSH,      /* Suppressed due to flush request */
+        B43legacy_TXST_SUPP_PREV,       /* Previous fragment failed */
+        B43legacy_TXST_SUPP_CHAN,       /* Channel mismatch */
+        B43legacy_TXST_SUPP_LIFE,       /* Lifetime expired */
+        B43legacy_TXST_SUPP_UNDER,      /* Buffer underflow */
+        B43legacy_TXST_SUPP_ABNACK,     /* Afterburner NACK */
+};
+
+/* Transmit Status as received through DMA/PIO on old chips */
+struct b43legacy_hwtxstatus {
+        PAD_BYTES(4);
+        __le16 cookie;
+        u8 flags;
+        u8 count;
+        PAD_BYTES(2);
+        __le16 seq;
+        u8 phy_stat;
+        PAD_BYTES(1);
+} __attribute__((__packed__));
+
+
+/* Receive header for v3 firmware. */
+struct b43legacy_rxhdr_fw3 {
+        __le16 frame_len;       /* Frame length */
+        PAD_BYTES(2);
+        __le16 phy_status0;     /* PHY RX Status 0 */
+        __u8 jssi;              /* PHY RX Status 1: JSSI */
+        __u8 sig_qual;          /* PHY RX Status 1: Signal Quality */
+        PAD_BYTES(2);           /* PHY RX Status 2 */
+        __le16 phy_status3;     /* PHY RX Status 3 */
+        __le16 mac_status;      /* MAC RX status */
+        __le16 mac_time;
+        __le16 channel;
+} __attribute__((__packed__));
+
+
+/* PHY RX Status 0 */
+#define B43legacy_RX_PHYST0_GAINCTL     0x4000 /* Gain Control */
+#define B43legacy_RX_PHYST0_PLCPHCF     0x0200
+#define B43legacy_RX_PHYST0_PLCPFV      0x0100
+#define B43legacy_RX_PHYST0_SHORTPRMBL  0x0080 /* Recvd with Short Preamble */
+#define B43legacy_RX_PHYST0_LCRS        0x0040
+#define B43legacy_RX_PHYST0_ANT         0x0020 /* Antenna */
+#define B43legacy_RX_PHYST0_UNSRATE     0x0010
+#define B43legacy_RX_PHYST0_CLIP        0x000C
+#define B43legacy_RX_PHYST0_CLIP_SHIFT  2
+#define B43legacy_RX_PHYST0_FTYPE       0x0003 /* Frame type */
+#define  B43legacy_RX_PHYST0_CCK        0x0000 /* Frame type: CCK */
+#define  B43legacy_RX_PHYST0_OFDM       0x0001 /* Frame type: OFDM */
+#define  B43legacy_RX_PHYST0_PRE_N      0x0002 /* Pre-standard N-PHY frame */
+#define  B43legacy_RX_PHYST0_STD_N      0x0003 /* Standard N-PHY frame */
+
+/* PHY RX Status 2 */
+#define B43legacy_RX_PHYST2_LNAG        0xC000 /* LNA Gain */
+#define B43legacy_RX_PHYST2_LNAG_SHIFT  14
+#define B43legacy_RX_PHYST2_PNAG        0x3C00 /* PNA Gain */
+#define B43legacy_RX_PHYST2_PNAG_SHIFT  10
+#define B43legacy_RX_PHYST2_FOFF        0x03FF /* F offset */
+
+/* PHY RX Status 3 */
+#define B43legacy_RX_PHYST3_DIGG        0x1800 /* DIG Gain */
+#define B43legacy_RX_PHYST3_DIGG_SHIFT  11
+#define B43legacy_RX_PHYST3_TRSTATE     0x0400 /* TR state */
+
+/* MAC RX Status */
+#define B43legacy_RX_MAC_BEACONSENT     0x00008000 /* Beacon send flag */
+#define B43legacy_RX_MAC_KEYIDX         0x000007E0 /* Key index */
+#define B43legacy_RX_MAC_KEYIDX_SHIFT   5
+#define B43legacy_RX_MAC_DECERR         0x00000010 /* Decrypt error */
+#define B43legacy_RX_MAC_DEC            0x00000008 /* Decryption attempted */
+#define B43legacy_RX_MAC_PADDING        0x00000004 /* Pad bytes present */
+#define B43legacy_RX_MAC_RESP           0x00000002 /* Response frame xmitted */
+#define B43legacy_RX_MAC_FCSERR         0x00000001 /* FCS error */
+
+/* RX channel */
+#define B43legacy_RX_CHAN_GAIN          0xFC00 /* Gain */
+#define B43legacy_RX_CHAN_GAIN_SHIFT    10
+#define B43legacy_RX_CHAN_ID            0x03FC /* Channel ID */
+#define B43legacy_RX_CHAN_ID_SHIFT      2
+#define B43legacy_RX_CHAN_PHYTYPE       0x0003 /* PHY type */
+
+
+
+u8 b43legacy_plcp_get_ratecode_cck(const u8 bitrate);
+u8 b43legacy_plcp_get_ratecode_ofdm(const u8 bitrate);
+
+void b43legacy_generate_plcp_hdr(struct b43legacy_plcp_hdr4 *plcp,
+                               const u16 octets, const u8 bitrate);
+
+void b43legacy_rx(struct b43legacy_wldev *dev,
+                struct sk_buff *skb,
+                const void *_rxhdr);
+
+void b43legacy_handle_txstatus(struct b43legacy_wldev *dev,
+                               const struct b43legacy_txstatus *status);
+
+void b43legacy_handle_hwtxstatus(struct b43legacy_wldev *dev,
+                                 const struct b43legacy_hwtxstatus *hw);
+
+void b43legacy_tx_suspend(struct b43legacy_wldev *dev);
+void b43legacy_tx_resume(struct b43legacy_wldev *dev);
+
+
+#define B43legacy_NR_QOSPARMS   22
+enum {
+        B43legacy_QOSPARM_TXOP = 0,
+        B43legacy_QOSPARM_CWMIN,
+        B43legacy_QOSPARM_CWMAX,
+        B43legacy_QOSPARM_CWCUR,
+        B43legacy_QOSPARM_AIFS,
+        B43legacy_QOSPARM_BSLOTS,
+        B43legacy_QOSPARM_REGGAP,
+        B43legacy_QOSPARM_STATUS,
+};
+
+void b43legacy_qos_init(struct b43legacy_wldev *dev);
+
+
+/* Helper functions for converting the key-table index from "firmware-format"
+ * to "raw-format" and back. The firmware API changed for this at some revision.
+ * We need to account for that here. */
+static inline
+int b43legacy_new_kidx_api(struct b43legacy_wldev *dev)
+{
+        /* FIXME: Not sure the change was at rev 351 */
+        return (dev->fw.rev >= 351);
+}
+static inline
+u8 b43legacy_kidx_to_fw(struct b43legacy_wldev *dev, u8 raw_kidx)
+{
+        u8 firmware_kidx;
+        if (b43legacy_new_kidx_api(dev))
+                firmware_kidx = raw_kidx;
+        else {
+                if (raw_kidx >= 4) /* Is per STA key? */
+                        firmware_kidx = raw_kidx - 4;
+                else
+                        firmware_kidx = raw_kidx; /* TX default key */
+        }
+        return firmware_kidx;
+}
+static inline
+u8 b43legacy_kidx_to_raw(struct b43legacy_wldev *dev, u8 firmware_kidx)
+{
+        u8 raw_kidx;
+        if (b43legacy_new_kidx_api(dev))
+                raw_kidx = firmware_kidx;
+        else
+                /* RX default keys or per STA keys */
+                raw_kidx = firmware_kidx + 4;
+        return raw_kidx;
+}
+
+#endif /* B43legacy_XMIT_H_ */