[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_ */