[B43]: add mac80211-based driver for modern BCM43xx devices

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 250 insertions, 0 deletions

diff --git a/drivers/net/wireless/b43/xmit.h b/drivers/net/wireless/b43/xmit.h
new file mode 100644
index 00000000000..03bddd25161
--- /dev/null
+++ b/drivers/net/wireless/b43/xmit.h
@@ -0,0 +1,250 @@
+#ifndef B43_XMIT_H_
+#define B43_XMIT_H_
+
+#include "main.h"
+
+#define _b43_declare_plcp_hdr(size) \
+	struct b43_plcp_hdr##size {		\
+		union {				\
+			__le32 data;		\
+			__u8 raw[size];		\
+		} __attribute__((__packed__));	\
+	} __attribute__((__packed__))
+
+/* struct b43_plcp_hdr4 */
+_b43_declare_plcp_hdr(4);
+/* struct b43_plcp_hdr6 */
+_b43_declare_plcp_hdr(6);
+
+#undef _b43_declare_plcp_hdr
+
+/* TX header for v4 firmware */
+struct b43_txhdr_fw4 {
+	__le32 mac_ctl;		/* MAC TX control */
+	__le16 mac_frame_ctl;	/* Copy of the FrameControl field */
+	__le16 tx_fes_time_norm;	/* TX FES Time Normal */
+	__le16 phy_ctl;		/* PHY TX control */
+	__le16 phy_ctl_0;	/* Unused */
+	__le16 phy_ctl_1;	/* Unused */
+	__le16 phy_ctl_rts_0;	/* Unused */
+	__le16 phy_ctl_rts_1;	/* Unused */
+	__u8 phy_rate;		/* PHY rate */
+	__u8 phy_rate_rts;	/* PHY rate for RTS/CTS */
+	__u8 extra_ft;		/* Extra Frame Types */
+	__u8 chan_radio_code;	/* Channel Radio Code */
+	__u8 iv[16];		/* Encryption IV */
+	__u8 tx_receiver[6];	/* TX Frame Receiver address */
+	__le16 tx_fes_time_fb;	/* TX FES Time Fallback */
+	struct b43_plcp_hdr6 rts_plcp_fb;	/* RTS fallback PLCP */
+	__le16 rts_dur_fb;	/* RTS fallback duration */
+	struct b43_plcp_hdr6 plcp_fb;	/* Fallback PLCP */
+	__le16 dur_fb;		/* Fallback duration */
+	__le16 mm_dur_time;	/* Unused */
+	__le16 mm_dur_time_fb;	/* Unused */
+	__le32 time_stamp;	/* Timestamp */
+	 PAD_BYTES(2);
+	__le16 cookie;		/* TX frame cookie */
+	__le16 tx_status;	/* TX status */
+	struct b43_plcp_hdr6 rts_plcp;	/* RTS PLCP */
+	__u8 rts_frame[16];	/* The RTS frame (if used) */
+	 PAD_BYTES(2);
+	struct b43_plcp_hdr6 plcp;	/* Main PLCP */
+} __attribute__ ((__packed__));
+
+/* MAC TX control */
+#define B43_TX4_MAC_KEYIDX		0x0FF00000	/* Security key index */
+#define B43_TX4_MAC_KEYIDX_SHIFT	20
+#define B43_TX4_MAC_KEYALG		0x00070000	/* Security key algorithm */
+#define B43_TX4_MAC_KEYALG_SHIFT	16
+#define B43_TX4_MAC_LIFETIME	0x00001000
+#define B43_TX4_MAC_FRAMEBURST	0x00000800
+#define B43_TX4_MAC_SENDCTS		0x00000400
+#define B43_TX4_MAC_AMPDU		0x00000300
+#define B43_TX4_MAC_AMPDU_SHIFT	8
+#define B43_TX4_MAC_5GHZ		0x00000080
+#define B43_TX4_MAC_IGNPMQ		0x00000020
+#define B43_TX4_MAC_HWSEQ		0x00000010	/* Use Hardware Sequence Number */
+#define B43_TX4_MAC_STMSDU		0x00000008	/* Start MSDU */
+#define B43_TX4_MAC_SENDRTS		0x00000004
+#define B43_TX4_MAC_LONGFRAME	0x00000002
+#define B43_TX4_MAC_ACK		0x00000001
+
+/* Extra Frame Types */
+#define B43_TX4_EFT_FBOFDM		0x0001	/* Data frame fallback rate type */
+#define B43_TX4_EFT_RTSOFDM		0x0004	/* RTS/CTS rate type */
+#define B43_TX4_EFT_RTSFBOFDM	0x0010	/* RTS/CTS fallback rate type */
+
+/* PHY TX control word */
+#define B43_TX4_PHY_OFDM		0x0001	/* Data frame rate type */
+#define B43_TX4_PHY_SHORTPRMBL	0x0010	/* Use short preamble */
+#define B43_TX4_PHY_ANT		0x03C0	/* Antenna selection */
+#define  B43_TX4_PHY_ANT0		0x0000	/* Use antenna 0 */
+#define  B43_TX4_PHY_ANT1		0x0100	/* Use antenna 1 */
+#define  B43_TX4_PHY_ANTLAST	0x0300	/* Use last used antenna */
+
+void b43_generate_txhdr(struct b43_wldev *dev,
+			u8 * txhdr,
+			const unsigned char *fragment_data,
+			unsigned int fragment_len,
+			const struct ieee80211_tx_control *txctl, u16 cookie);
+
+/* Transmit Status */
+struct b43_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 (not final) */
+	u8 for_ampdu;		/* Status is for an AMPDU (afterburner) */
+	u8 acked;		/* Wireless ACK received */
+};
+
+/* txstatus supp_reason values */
+enum {
+	B43_TXST_SUPP_NONE,	/* Not suppressed */
+	B43_TXST_SUPP_PMQ,	/* Suppressed due to PMQ entry */
+	B43_TXST_SUPP_FLUSH,	/* Suppressed due to flush request */
+	B43_TXST_SUPP_PREV,	/* Previous fragment failed */
+	B43_TXST_SUPP_CHAN,	/* Channel mismatch */
+	B43_TXST_SUPP_LIFE,	/* Lifetime expired */
+	B43_TXST_SUPP_UNDER,	/* Buffer underflow */
+	B43_TXST_SUPP_ABNACK,	/* Afterburner NACK */
+};
+
+/* Transmit Status as received through DMA/PIO on old chips */
+struct b43_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 v4 firmware. */
+struct b43_rxhdr_fw4 {
+	__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 */
+	__le16 phy_status2;	/* PHY RX Status 2 */
+	__le16 phy_status3;	/* PHY RX Status 3 */
+	__le32 mac_status;	/* MAC RX status */
+	__le16 mac_time;
+	__le16 channel;
+} __attribute__ ((__packed__));
+
+/* PHY RX Status 0 */
+#define B43_RX_PHYST0_GAINCTL	0x4000	/* Gain Control */
+#define B43_RX_PHYST0_PLCPHCF	0x0200
+#define B43_RX_PHYST0_PLCPFV	0x0100
+#define B43_RX_PHYST0_SHORTPRMBL	0x0080	/* Received with Short Preamble */
+#define B43_RX_PHYST0_LCRS		0x0040
+#define B43_RX_PHYST0_ANT		0x0020	/* Antenna */
+#define B43_RX_PHYST0_UNSRATE	0x0010
+#define B43_RX_PHYST0_CLIP		0x000C
+#define B43_RX_PHYST0_CLIP_SHIFT	2
+#define B43_RX_PHYST0_FTYPE		0x0003	/* Frame type */
+#define  B43_RX_PHYST0_CCK		0x0000	/* Frame type: CCK */
+#define  B43_RX_PHYST0_OFDM		0x0001	/* Frame type: OFDM */
+#define  B43_RX_PHYST0_PRE_N	0x0002	/* Pre-standard N-PHY frame */
+#define  B43_RX_PHYST0_STD_N	0x0003	/* Standard N-PHY frame */
+
+/* PHY RX Status 2 */
+#define B43_RX_PHYST2_LNAG		0xC000	/* LNA Gain */
+#define B43_RX_PHYST2_LNAG_SHIFT	14
+#define B43_RX_PHYST2_PNAG		0x3C00	/* PNA Gain */
+#define B43_RX_PHYST2_PNAG_SHIFT	10
+#define B43_RX_PHYST2_FOFF		0x03FF	/* F offset */
+
+/* PHY RX Status 3 */
+#define B43_RX_PHYST3_DIGG		0x1800	/* DIG Gain */
+#define B43_RX_PHYST3_DIGG_SHIFT	11
+#define B43_RX_PHYST3_TRSTATE	0x0400	/* TR state */
+
+/* MAC RX Status */
+#define B43_RX_MAC_BEACONSENT	0x00008000	/* Beacon send flag */
+#define B43_RX_MAC_KEYIDX		0x000007E0	/* Key index */
+#define B43_RX_MAC_KEYIDX_SHIFT	5
+#define B43_RX_MAC_DECERR		0x00000010	/* Decrypt error */
+#define B43_RX_MAC_DEC		0x00000008	/* Decryption attempted */
+#define B43_RX_MAC_PADDING		0x00000004	/* Pad bytes present */
+#define B43_RX_MAC_RESP		0x00000002	/* Response frame transmitted */
+#define B43_RX_MAC_FCSERR		0x00000001	/* FCS error */
+
+/* RX channel */
+#define B43_RX_CHAN_GAIN		0xFC00	/* Gain */
+#define B43_RX_CHAN_GAIN_SHIFT	10
+#define B43_RX_CHAN_ID		0x03FC	/* Channel ID */
+#define B43_RX_CHAN_ID_SHIFT	2
+#define B43_RX_CHAN_PHYTYPE		0x0003	/* PHY type */
+
+u8 b43_plcp_get_ratecode_cck(const u8 bitrate);
+u8 b43_plcp_get_ratecode_ofdm(const u8 bitrate);
+
+void b43_generate_plcp_hdr(struct b43_plcp_hdr4 *plcp,
+			   const u16 octets, const u8 bitrate);
+
+void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr);
+
+void b43_handle_txstatus(struct b43_wldev *dev,
+			 const struct b43_txstatus *status);
+
+void b43_handle_hwtxstatus(struct b43_wldev *dev,
+			   const struct b43_hwtxstatus *hw);
+
+void b43_tx_suspend(struct b43_wldev *dev);
+void b43_tx_resume(struct b43_wldev *dev);
+
+#define B43_NR_QOSPARMS		22
+enum {
+	B43_QOSPARM_TXOP = 0,
+	B43_QOSPARM_CWMIN,
+	B43_QOSPARM_CWMAX,
+	B43_QOSPARM_CWCUR,
+	B43_QOSPARM_AIFS,
+	B43_QOSPARM_BSLOTS,
+	B43_QOSPARM_REGGAP,
+	B43_QOSPARM_STATUS,
+};
+void b43_qos_init(struct b43_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 b43_new_kidx_api(struct b43_wldev *dev)
+{
+	/* FIXME: Not sure the change was at rev 351 */
+	return (dev->fw.rev >= 351);
+}
+static inline u8 b43_kidx_to_fw(struct b43_wldev *dev, u8 raw_kidx)
+{
+	u8 firmware_kidx;
+	if (b43_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 b43_kidx_to_raw(struct b43_wldev *dev, u8 firmware_kidx)
+{
+	u8 raw_kidx;
+	if (b43_new_kidx_api(dev))
+		raw_kidx = firmware_kidx;
+	else
+		raw_kidx = firmware_kidx + 4;	/* RX default keys or per STA keys */
+	return raw_kidx;
+}
+
+#endif /* B43_XMIT_H_ */