New driver "sfc" for Solarstorm SFC4000 controller.

The driver supports the 10Xpress PHY and XFP modules on our reference
designs SFE4001 and SFE4002 and the SMC models SMC10GPCIe-XFP and
SMC10GPCIe-10BT.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 195 insertions, 0 deletions

diff --git a/drivers/net/sfc/gmii.h b/drivers/net/sfc/gmii.h
new file mode 100644
index 000000000000..d25bbd1297f4
--- /dev/null
+++ b/drivers/net/sfc/gmii.h
@@ -0,0 +1,195 @@
+/****************************************************************************
+ * Driver for Solarflare Solarstorm network controllers and boards
+ * Copyright 2005-2006 Fen Systems Ltd.
+ * Copyright 2006 Solarflare Communications Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation, incorporated herein by reference.
+ */
+
+#ifndef EFX_GMII_H
+#define EFX_GMII_H
+
+/*
+ * GMII interface
+ */
+
+#include <linux/mii.h>
+
+/* GMII registers, excluding registers already defined as MII
+ * registers in mii.h
+ */
+#define GMII_IER		0x12	/* Interrupt enable register */
+#define GMII_ISR		0x13	/* Interrupt status register */
+
+/* Interrupt enable register */
+#define IER_ANEG_ERR		0x8000	/* Bit 15 - autonegotiation error */
+#define IER_SPEED_CHG		0x4000	/* Bit 14 - speed changed */
+#define IER_DUPLEX_CHG		0x2000	/* Bit 13 - duplex changed */
+#define IER_PAGE_RCVD		0x1000	/* Bit 12 - page received */
+#define IER_ANEG_DONE		0x0800	/* Bit 11 - autonegotiation complete */
+#define IER_LINK_CHG		0x0400	/* Bit 10 - link status changed */
+#define IER_SYM_ERR		0x0200	/* Bit 9 - symbol error */
+#define IER_FALSE_CARRIER	0x0100	/* Bit 8 - false carrier */
+#define IER_FIFO_ERR		0x0080	/* Bit 7 - FIFO over/underflow */
+#define IER_MDIX_CHG		0x0040	/* Bit 6 - MDI crossover changed */
+#define IER_DOWNSHIFT		0x0020	/* Bit 5 - downshift */
+#define IER_ENERGY		0x0010	/* Bit 4 - energy detect */
+#define IER_DTE_POWER		0x0004	/* Bit 2 - DTE power detect */
+#define IER_POLARITY_CHG	0x0002	/* Bit 1 - polarity changed */
+#define IER_JABBER		0x0001	/* Bit 0 - jabber */
+
+/* Interrupt status register */
+#define ISR_ANEG_ERR		0x8000	/* Bit 15 - autonegotiation error */
+#define ISR_SPEED_CHG		0x4000	/* Bit 14 - speed changed */
+#define ISR_DUPLEX_CHG		0x2000	/* Bit 13 - duplex changed */
+#define ISR_PAGE_RCVD		0x1000	/* Bit 12 - page received */
+#define ISR_ANEG_DONE		0x0800	/* Bit 11 - autonegotiation complete */
+#define ISR_LINK_CHG		0x0400	/* Bit 10 - link status changed */
+#define ISR_SYM_ERR		0x0200	/* Bit 9 - symbol error */
+#define ISR_FALSE_CARRIER	0x0100	/* Bit 8 - false carrier */
+#define ISR_FIFO_ERR		0x0080	/* Bit 7 - FIFO over/underflow */
+#define ISR_MDIX_CHG		0x0040	/* Bit 6 - MDI crossover changed */
+#define ISR_DOWNSHIFT		0x0020	/* Bit 5 - downshift */
+#define ISR_ENERGY		0x0010	/* Bit 4 - energy detect */
+#define ISR_DTE_POWER		0x0004	/* Bit 2 - DTE power detect */
+#define ISR_POLARITY_CHG	0x0002	/* Bit 1 - polarity changed */
+#define ISR_JABBER		0x0001	/* Bit 0 - jabber */
+
+/* Logically extended advertisement register */
+#define GM_ADVERTISE_SLCT		ADVERTISE_SLCT
+#define GM_ADVERTISE_CSMA		ADVERTISE_CSMA
+#define GM_ADVERTISE_10HALF		ADVERTISE_10HALF
+#define GM_ADVERTISE_1000XFULL		ADVERTISE_1000XFULL
+#define GM_ADVERTISE_10FULL		ADVERTISE_10FULL
+#define GM_ADVERTISE_1000XHALF		ADVERTISE_1000XHALF
+#define GM_ADVERTISE_100HALF		ADVERTISE_100HALF
+#define GM_ADVERTISE_1000XPAUSE		ADVERTISE_1000XPAUSE
+#define GM_ADVERTISE_100FULL		ADVERTISE_100FULL
+#define GM_ADVERTISE_1000XPSE_ASYM	ADVERTISE_1000XPSE_ASYM
+#define GM_ADVERTISE_100BASE4		ADVERTISE_100BASE4
+#define GM_ADVERTISE_PAUSE_CAP		ADVERTISE_PAUSE_CAP
+#define GM_ADVERTISE_PAUSE_ASYM		ADVERTISE_PAUSE_ASYM
+#define GM_ADVERTISE_RESV		ADVERTISE_RESV
+#define GM_ADVERTISE_RFAULT		ADVERTISE_RFAULT
+#define GM_ADVERTISE_LPACK		ADVERTISE_LPACK
+#define GM_ADVERTISE_NPAGE		ADVERTISE_NPAGE
+#define GM_ADVERTISE_1000FULL		(ADVERTISE_1000FULL << 8)
+#define GM_ADVERTISE_1000HALF		(ADVERTISE_1000HALF << 8)
+#define GM_ADVERTISE_1000		(GM_ADVERTISE_1000FULL | \
+					 GM_ADVERTISE_1000HALF)
+#define GM_ADVERTISE_FULL		(GM_ADVERTISE_1000FULL | \
+					 ADVERTISE_FULL)
+#define GM_ADVERTISE_ALL		(GM_ADVERTISE_1000FULL | \
+					 GM_ADVERTISE_1000HALF | \
+					 ADVERTISE_ALL)
+
+/* Logically extended link partner ability register */
+#define GM_LPA_SLCT			LPA_SLCT
+#define GM_LPA_10HALF			LPA_10HALF
+#define GM_LPA_1000XFULL		LPA_1000XFULL
+#define GM_LPA_10FULL			LPA_10FULL
+#define GM_LPA_1000XHALF		LPA_1000XHALF
+#define GM_LPA_100HALF			LPA_100HALF
+#define GM_LPA_1000XPAUSE		LPA_1000XPAUSE
+#define GM_LPA_100FULL			LPA_100FULL
+#define GM_LPA_1000XPAUSE_ASYM		LPA_1000XPAUSE_ASYM
+#define GM_LPA_100BASE4			LPA_100BASE4
+#define GM_LPA_PAUSE_CAP		LPA_PAUSE_CAP
+#define GM_LPA_PAUSE_ASYM		LPA_PAUSE_ASYM
+#define GM_LPA_RESV			LPA_RESV
+#define GM_LPA_RFAULT			LPA_RFAULT
+#define GM_LPA_LPACK			LPA_LPACK
+#define GM_LPA_NPAGE			LPA_NPAGE
+#define GM_LPA_1000FULL			(LPA_1000FULL << 6)
+#define GM_LPA_1000HALF			(LPA_1000HALF << 6)
+#define GM_LPA_10000FULL		0x00040000
+#define GM_LPA_10000HALF		0x00080000
+#define GM_LPA_DUPLEX			(GM_LPA_1000FULL | GM_LPA_10000FULL \
+					 | LPA_DUPLEX)
+#define GM_LPA_10			(LPA_10FULL | LPA_10HALF)
+#define GM_LPA_100			LPA_100
+#define GM_LPA_1000			(GM_LPA_1000FULL | GM_LPA_1000HALF)
+#define GM_LPA_10000			(GM_LPA_10000FULL | GM_LPA_10000HALF)
+
+/* Retrieve GMII autonegotiation advertised abilities
+ *
+ * The MII advertisment register (MII_ADVERTISE) is logically extended
+ * to include advertisement bits ADVERTISE_1000FULL and
+ * ADVERTISE_1000HALF from MII_CTRL1000.  The result can be tested
+ * against the GM_ADVERTISE_xxx constants.
+ */
+static inline unsigned int gmii_advertised(struct mii_if_info *gmii)
+{
+	unsigned int advertise;
+	unsigned int ctrl1000;
+
+	advertise = gmii->mdio_read(gmii->dev, gmii->phy_id, MII_ADVERTISE);
+	ctrl1000 = gmii->mdio_read(gmii->dev, gmii->phy_id, MII_CTRL1000);
+	return (((ctrl1000 << 8) & GM_ADVERTISE_1000) | advertise);
+}
+
+/* Retrieve GMII autonegotiation link partner abilities
+ *
+ * The MII link partner ability register (MII_LPA) is logically
+ * extended by adding bits LPA_1000HALF and LPA_1000FULL from
+ * MII_STAT1000.  The result can be tested against the GM_LPA_xxx
+ * constants.
+ */
+static inline unsigned int gmii_lpa(struct mii_if_info *gmii)
+{
+	unsigned int lpa;
+	unsigned int stat1000;
+
+	lpa = gmii->mdio_read(gmii->dev, gmii->phy_id, MII_LPA);
+	stat1000 = gmii->mdio_read(gmii->dev, gmii->phy_id, MII_STAT1000);
+	return (((stat1000 << 6) & GM_LPA_1000) | lpa);
+}
+
+/* Calculate GMII autonegotiated link technology
+ *
+ * "negotiated" should be the result of gmii_advertised() logically
+ * ANDed with the result of gmii_lpa().
+ *
+ * "tech" will be negotiated with the unused bits masked out.  For
+ * example, if both ends of the link are capable of both
+ * GM_LPA_1000FULL and GM_LPA_100FULL, GM_LPA_100FULL will be masked
+ * out.
+ */
+static inline unsigned int gmii_nway_result(unsigned int negotiated)
+{
+	unsigned int other_bits;
+
+	/* Mask out the speed and duplexity bits */
+	other_bits = negotiated & ~(GM_LPA_10 | GM_LPA_100 | GM_LPA_1000);
+
+	if (negotiated & GM_LPA_1000FULL)
+		return (other_bits | GM_LPA_1000FULL);
+	else if (negotiated & GM_LPA_1000HALF)
+		return (other_bits | GM_LPA_1000HALF);
+	else
+		return (other_bits | mii_nway_result(negotiated));
+}
+
+/* Calculate GMII non-autonegotiated link technology
+ *
+ * This provides an equivalent to gmii_nway_result for the case when
+ * autonegotiation is disabled.
+ */
+static inline unsigned int gmii_forced_result(unsigned int bmcr)
+{
+	unsigned int result;
+	int full_duplex;
+
+	full_duplex = bmcr & BMCR_FULLDPLX;
+	if (bmcr & BMCR_SPEED1000)
+		result = full_duplex ? GM_LPA_1000FULL : GM_LPA_1000HALF;
+	else if (bmcr & BMCR_SPEED100)
+		result = full_duplex ? GM_LPA_100FULL : GM_LPA_100HALF;
+	else
+		result = full_duplex ? GM_LPA_10FULL : GM_LPA_10HALF;
+	return result;
+}
+
+#endif /* EFX_GMII_H */