b43: Implement dynamic PHY API

This patch implements a dynamic "ops" based PHY API.
This is needed in order to conveniently support future PHY types
to avoid the "switch"-hell.

This patch does not change any functionality. It just moves lots
of code from one place to another and adjusts it for the changed
data structures.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 201 insertions, 0 deletions

diff --git a/drivers/net/wireless/b43/phy_g.h b/drivers/net/wireless/b43/phy_g.h
new file mode 100644
index 000000000000..1f0daebd6eb6
--- /dev/null
+++ b/drivers/net/wireless/b43/phy_g.h
@@ -0,0 +1,201 @@
+#ifndef LINUX_B43_PHY_G_H_
+#define LINUX_B43_PHY_G_H_
+
+/* OFDM PHY registers are defined in the A-PHY header. */
+#include "phy_a.h"
+
+/* CCK (B) PHY Registers */
+#define B43_PHY_VERSION_CCK		B43_PHY_CCK(0x00)	/* Versioning register for B-PHY */
+#define B43_PHY_CCKBBANDCFG		B43_PHY_CCK(0x01)	/* Contains antenna 0/1 control bit */
+#define B43_PHY_PGACTL			B43_PHY_CCK(0x15)	/* PGA control */
+#define  B43_PHY_PGACTL_LPF		0x1000	/* Low pass filter (?) */
+#define  B43_PHY_PGACTL_LOWBANDW	0x0040	/* Low bandwidth flag */
+#define  B43_PHY_PGACTL_UNKNOWN		0xEFA0
+#define B43_PHY_FBCTL1			B43_PHY_CCK(0x18)	/* Frequency bandwidth control 1 */
+#define B43_PHY_ITSSI			B43_PHY_CCK(0x29)	/* Idle TSSI */
+#define B43_PHY_LO_LEAKAGE		B43_PHY_CCK(0x2D)	/* Measured LO leakage */
+#define B43_PHY_ENERGY			B43_PHY_CCK(0x33)	/* Energy */
+#define B43_PHY_SYNCCTL			B43_PHY_CCK(0x35)
+#define B43_PHY_FBCTL2			B43_PHY_CCK(0x38)	/* Frequency bandwidth control 2 */
+#define B43_PHY_DACCTL			B43_PHY_CCK(0x60)	/* DAC control */
+#define B43_PHY_RCCALOVER		B43_PHY_CCK(0x78)	/* RC calibration override */
+
+/* Extended G-PHY Registers */
+#define B43_PHY_CLASSCTL		B43_PHY_EXTG(0x02)	/* Classify control */
+#define B43_PHY_GTABCTL			B43_PHY_EXTG(0x03)	/* G-PHY table control (see below) */
+#define  B43_PHY_GTABOFF		0x03FF	/* G-PHY table offset (see below) */
+#define  B43_PHY_GTABNR			0xFC00	/* G-PHY table number (see below) */
+#define  B43_PHY_GTABNR_SHIFT		10
+#define B43_PHY_GTABDATA		B43_PHY_EXTG(0x04)	/* G-PHY table data */
+#define B43_PHY_LO_MASK			B43_PHY_EXTG(0x0F)	/* Local Oscillator control mask */
+#define B43_PHY_LO_CTL			B43_PHY_EXTG(0x10)	/* Local Oscillator control */
+#define B43_PHY_RFOVER			B43_PHY_EXTG(0x11)	/* RF override */
+#define B43_PHY_RFOVERVAL		B43_PHY_EXTG(0x12)	/* RF override value */
+#define  B43_PHY_RFOVERVAL_EXTLNA	0x8000
+#define  B43_PHY_RFOVERVAL_LNA		0x7000
+#define  B43_PHY_RFOVERVAL_LNA_SHIFT	12
+#define  B43_PHY_RFOVERVAL_PGA		0x0F00
+#define  B43_PHY_RFOVERVAL_PGA_SHIFT	8
+#define  B43_PHY_RFOVERVAL_UNK		0x0010	/* Unknown, always set. */
+#define  B43_PHY_RFOVERVAL_TRSWRX	0x00E0
+#define  B43_PHY_RFOVERVAL_BW		0x0003	/* Bandwidth flags */
+#define   B43_PHY_RFOVERVAL_BW_LPF	0x0001	/* Low Pass Filter */
+#define   B43_PHY_RFOVERVAL_BW_LBW	0x0002	/* Low Bandwidth (when set), high when unset */
+#define B43_PHY_ANALOGOVER		B43_PHY_EXTG(0x14)	/* Analog override */
+#define B43_PHY_ANALOGOVERVAL		B43_PHY_EXTG(0x15)	/* Analog override value */
+
+
+/*** G-PHY table numbers */
+#define B43_GTAB(number, offset)	(((number) << B43_PHY_GTABNR_SHIFT) | (offset))
+#define B43_GTAB_NRSSI			B43_GTAB(0x00, 0)
+#define B43_GTAB_TRFEMW			B43_GTAB(0x0C, 0x120)
+#define B43_GTAB_ORIGTR			B43_GTAB(0x2E, 0x298)
+
+u16 b43_gtab_read(struct b43_wldev *dev, u16 table, u16 offset);
+void b43_gtab_write(struct b43_wldev *dev, u16 table, u16 offset, u16 value);
+
+
+/* Returns the boolean whether "TX Magnification" is enabled. */
+#define has_tx_magnification(phy) \
+	(((phy)->rev >= 2) &&			\
+	 ((phy)->radio_ver == 0x2050) &&	\
+	 ((phy)->radio_rev == 8))
+/* Card uses the loopback gain stuff */
+#define has_loopback_gain(phy) \
+	(((phy)->rev > 1) || ((phy)->gmode))
+
+/* Radio Attenuation (RF Attenuation) */
+struct b43_rfatt {
+	u8 att;			/* Attenuation value */
+	bool with_padmix;	/* Flag, PAD Mixer enabled. */
+};
+struct b43_rfatt_list {
+	/* Attenuation values list */
+	const struct b43_rfatt *list;
+	u8 len;
+	/* Minimum/Maximum attenuation values */
+	u8 min_val;
+	u8 max_val;
+};
+
+/* Returns true, if the values are the same. */
+static inline bool b43_compare_rfatt(const struct b43_rfatt *a,
+				     const struct b43_rfatt *b)
+{
+	return ((a->att == b->att) &&
+		(a->with_padmix == b->with_padmix));
+}
+
+/* Baseband Attenuation */
+struct b43_bbatt {
+	u8 att;			/* Attenuation value */
+};
+struct b43_bbatt_list {
+	/* Attenuation values list */
+	const struct b43_bbatt *list;
+	u8 len;
+	/* Minimum/Maximum attenuation values */
+	u8 min_val;
+	u8 max_val;
+};
+
+/* Returns true, if the values are the same. */
+static inline bool b43_compare_bbatt(const struct b43_bbatt *a,
+				     const struct b43_bbatt *b)
+{
+	return (a->att == b->att);
+}
+
+/* tx_control bits. */
+#define B43_TXCTL_PA3DB		0x40	/* PA Gain 3dB */
+#define B43_TXCTL_PA2DB		0x20	/* PA Gain 2dB */
+#define B43_TXCTL_TXMIX		0x10	/* TX Mixer Gain */
+
+struct b43_txpower_lo_control;
+
+struct b43_phy_g {
+	bool initialised;
+	bool dyn_tssi_tbl;	/* tssi2dbm is kmalloc()ed. */
+
+	/* ACI (adjacent channel interference) flags. */
+	bool aci_enable;
+	bool aci_wlan_automatic;
+	bool aci_hw_rssi;
+
+	/* Radio switched on/off */
+	bool radio_on;
+	struct {
+		/* Values saved when turning the radio off.
+		 * They are needed when turning it on again. */
+		bool valid;
+		u16 rfover;
+		u16 rfoverval;
+	} radio_off_context;
+
+	u16 minlowsig[2];
+	u16 minlowsigpos[2];
+
+	/* TSSI to dBm table in use */
+	const s8 *tssi2dbm;
+	/* Target idle TSSI */
+	int tgt_idle_tssi;
+	/* Current idle TSSI */
+	int cur_idle_tssi;
+
+	/* LocalOscillator control values. */
+	struct b43_txpower_lo_control *lo_control;
+	/* Values from b43_calc_loopback_gain() */
+	s16 max_lb_gain;	/* Maximum Loopback gain in hdB */
+	s16 trsw_rx_gain;	/* TRSW RX gain in hdB */
+	s16 lna_lod_gain;	/* LNA lod */
+	s16 lna_gain;		/* LNA */
+	s16 pga_gain;		/* PGA */
+
+	/* Current TX power level attenuation control values */
+	struct b43_bbatt bbatt;
+	struct b43_rfatt rfatt;
+	u8 tx_control;		/* B43_TXCTL_XXX */
+
+	/* Current Interference Mitigation mode */
+	int interfmode;
+	/* Stack of saved values from the Interference Mitigation code.
+	 * Each value in the stack is layed out as follows:
+	 * bit 0-11:  offset
+	 * bit 12-15: register ID
+	 * bit 16-32: value
+	 * register ID is: 0x1 PHY, 0x2 Radio, 0x3 ILT
+	 */
+#define B43_INTERFSTACK_SIZE	26
+	u32 interfstack[B43_INTERFSTACK_SIZE];	//FIXME: use a data structure
+
+	/* Saved values from the NRSSI Slope calculation */
+	s16 nrssi[2];
+	s32 nrssislope;
+	/* In memory nrssi lookup table. */
+	s8 nrssi_lt[64];
+
+	u16 lofcal;
+
+	u16 initval;		//FIXME rename?
+
+	/* The device does address auto increment for the OFDM tables.
+	 * We cache the previously used address here and omit the address
+	 * write on the next table access, if possible. */
+	u16 ofdmtab_addr; /* The address currently set in hardware. */
+	enum { /* The last data flow direction. */
+		B43_OFDMTAB_DIRECTION_UNKNOWN = 0,
+		B43_OFDMTAB_DIRECTION_READ,
+		B43_OFDMTAB_DIRECTION_WRITE,
+	} ofdmtab_addr_direction;
+};
+
+void b43_gphy_set_baseband_attenuation(struct b43_wldev *dev,
+				       u16 baseband_attenuation);
+void b43_gphy_channel_switch(struct b43_wldev *dev,
+			     unsigned int channel,
+			     bool synthetic_pu_workaround);
+
+struct b43_phy_operations;
+extern const struct b43_phy_operations b43_phyops_g;
+
+#endif /* LINUX_B43_PHY_G_H_ */