Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 416 insertions, 0 deletions

diff --git a/drivers/net/ethernet/chelsio/cxgb3/vsc8211.c b/drivers/net/ethernet/chelsio/cxgb3/vsc8211.c
new file mode 100644
index 000000000..8638ad42b
--- /dev/null
+++ b/drivers/net/ethernet/chelsio/cxgb3/vsc8211.c
@@ -0,0 +1,416 @@
+/*
+ * Copyright (c) 2005-2008 Chelsio, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include "common.h"
+
+/* VSC8211 PHY specific registers. */
+enum {
+	VSC8211_SIGDET_CTRL = 19,
+	VSC8211_EXT_CTRL = 23,
+	VSC8211_INTR_ENABLE = 25,
+	VSC8211_INTR_STATUS = 26,
+	VSC8211_LED_CTRL = 27,
+	VSC8211_AUX_CTRL_STAT = 28,
+	VSC8211_EXT_PAGE_AXS = 31,
+};
+
+enum {
+	VSC_INTR_RX_ERR = 1 << 0,
+	VSC_INTR_MS_ERR = 1 << 1,  /* master/slave resolution error */
+	VSC_INTR_CABLE = 1 << 2,  /* cable impairment */
+	VSC_INTR_FALSE_CARR = 1 << 3,  /* false carrier */
+	VSC_INTR_MEDIA_CHG = 1 << 4,  /* AMS media change */
+	VSC_INTR_RX_FIFO = 1 << 5,  /* Rx FIFO over/underflow */
+	VSC_INTR_TX_FIFO = 1 << 6,  /* Tx FIFO over/underflow */
+	VSC_INTR_DESCRAMBL = 1 << 7,  /* descrambler lock-lost */
+	VSC_INTR_SYMBOL_ERR = 1 << 8,  /* symbol error */
+	VSC_INTR_NEG_DONE = 1 << 10, /* autoneg done */
+	VSC_INTR_NEG_ERR = 1 << 11, /* autoneg error */
+	VSC_INTR_DPLX_CHG = 1 << 12, /* duplex change */
+	VSC_INTR_LINK_CHG = 1 << 13, /* link change */
+	VSC_INTR_SPD_CHG = 1 << 14, /* speed change */
+	VSC_INTR_ENABLE = 1 << 15, /* interrupt enable */
+};
+
+enum {
+	VSC_CTRL_CLAUSE37_VIEW = 1 << 4,   /* Switch to Clause 37 view */
+	VSC_CTRL_MEDIA_MODE_HI = 0xf000    /* High part of media mode select */
+};
+
+#define CFG_CHG_INTR_MASK (VSC_INTR_LINK_CHG | VSC_INTR_NEG_ERR | \
+			   VSC_INTR_DPLX_CHG | VSC_INTR_SPD_CHG | \
+	 		   VSC_INTR_NEG_DONE)
+#define INTR_MASK (CFG_CHG_INTR_MASK | VSC_INTR_TX_FIFO | VSC_INTR_RX_FIFO | \
+		   VSC_INTR_ENABLE)
+
+/* PHY specific auxiliary control & status register fields */
+#define S_ACSR_ACTIPHY_TMR    0
+#define M_ACSR_ACTIPHY_TMR    0x3
+#define V_ACSR_ACTIPHY_TMR(x) ((x) << S_ACSR_ACTIPHY_TMR)
+
+#define S_ACSR_SPEED    3
+#define M_ACSR_SPEED    0x3
+#define G_ACSR_SPEED(x) (((x) >> S_ACSR_SPEED) & M_ACSR_SPEED)
+
+#define S_ACSR_DUPLEX 5
+#define F_ACSR_DUPLEX (1 << S_ACSR_DUPLEX)
+
+#define S_ACSR_ACTIPHY 6
+#define F_ACSR_ACTIPHY (1 << S_ACSR_ACTIPHY)
+
+/*
+ * Reset the PHY.  This PHY completes reset immediately so we never wait.
+ */
+static int vsc8211_reset(struct cphy *cphy, int wait)
+{
+	return t3_phy_reset(cphy, MDIO_DEVAD_NONE, 0);
+}
+
+static int vsc8211_intr_enable(struct cphy *cphy)
+{
+	return t3_mdio_write(cphy, MDIO_DEVAD_NONE, VSC8211_INTR_ENABLE,
+			     INTR_MASK);
+}
+
+static int vsc8211_intr_disable(struct cphy *cphy)
+{
+	return t3_mdio_write(cphy, MDIO_DEVAD_NONE, VSC8211_INTR_ENABLE, 0);
+}
+
+static int vsc8211_intr_clear(struct cphy *cphy)
+{
+	u32 val;
+
+	/* Clear PHY interrupts by reading the register. */
+	return t3_mdio_read(cphy, MDIO_DEVAD_NONE, VSC8211_INTR_STATUS, &val);
+}
+
+static int vsc8211_autoneg_enable(struct cphy *cphy)
+{
+	return t3_mdio_change_bits(cphy, MDIO_DEVAD_NONE, MII_BMCR,
+				   BMCR_PDOWN | BMCR_ISOLATE,
+				   BMCR_ANENABLE | BMCR_ANRESTART);
+}
+
+static int vsc8211_autoneg_restart(struct cphy *cphy)
+{
+	return t3_mdio_change_bits(cphy, MDIO_DEVAD_NONE, MII_BMCR,
+				   BMCR_PDOWN | BMCR_ISOLATE,
+				   BMCR_ANRESTART);
+}
+
+static int vsc8211_get_link_status(struct cphy *cphy, int *link_ok,
+				   int *speed, int *duplex, int *fc)
+{
+	unsigned int bmcr, status, lpa, adv;
+	int err, sp = -1, dplx = -1, pause = 0;
+
+	err = t3_mdio_read(cphy, MDIO_DEVAD_NONE, MII_BMCR, &bmcr);
+	if (!err)
+		err = t3_mdio_read(cphy, MDIO_DEVAD_NONE, MII_BMSR, &status);
+	if (err)
+		return err;
+
+	if (link_ok) {
+		/*
+		 * BMSR_LSTATUS is latch-low, so if it is 0 we need to read it
+		 * once more to get the current link state.
+		 */
+		if (!(status & BMSR_LSTATUS))
+			err = t3_mdio_read(cphy, MDIO_DEVAD_NONE, MII_BMSR,
+					   &status);
+		if (err)
+			return err;
+		*link_ok = (status & BMSR_LSTATUS) != 0;
+	}
+	if (!(bmcr & BMCR_ANENABLE)) {
+		dplx = (bmcr & BMCR_FULLDPLX) ? DUPLEX_FULL : DUPLEX_HALF;
+		if (bmcr & BMCR_SPEED1000)
+			sp = SPEED_1000;
+		else if (bmcr & BMCR_SPEED100)
+			sp = SPEED_100;
+		else
+			sp = SPEED_10;
+	} else if (status & BMSR_ANEGCOMPLETE) {
+		err = t3_mdio_read(cphy, MDIO_DEVAD_NONE, VSC8211_AUX_CTRL_STAT,
+				   &status);
+		if (err)
+			return err;
+
+		dplx = (status & F_ACSR_DUPLEX) ? DUPLEX_FULL : DUPLEX_HALF;
+		sp = G_ACSR_SPEED(status);
+		if (sp == 0)
+			sp = SPEED_10;
+		else if (sp == 1)
+			sp = SPEED_100;
+		else
+			sp = SPEED_1000;
+
+		if (fc && dplx == DUPLEX_FULL) {
+			err = t3_mdio_read(cphy, MDIO_DEVAD_NONE, MII_LPA,
+					   &lpa);
+			if (!err)
+				err = t3_mdio_read(cphy, MDIO_DEVAD_NONE,
+						   MII_ADVERTISE, &adv);
+			if (err)
+				return err;
+
+			if (lpa & adv & ADVERTISE_PAUSE_CAP)
+				pause = PAUSE_RX | PAUSE_TX;
+			else if ((lpa & ADVERTISE_PAUSE_CAP) &&
+				 (lpa & ADVERTISE_PAUSE_ASYM) &&
+				 (adv & ADVERTISE_PAUSE_ASYM))
+				pause = PAUSE_TX;
+			else if ((lpa & ADVERTISE_PAUSE_ASYM) &&
+				 (adv & ADVERTISE_PAUSE_CAP))
+				pause = PAUSE_RX;
+		}
+	}
+	if (speed)
+		*speed = sp;
+	if (duplex)
+		*duplex = dplx;
+	if (fc)
+		*fc = pause;
+	return 0;
+}
+
+static int vsc8211_get_link_status_fiber(struct cphy *cphy, int *link_ok,
+					 int *speed, int *duplex, int *fc)
+{
+	unsigned int bmcr, status, lpa, adv;
+	int err, sp = -1, dplx = -1, pause = 0;
+
+	err = t3_mdio_read(cphy, MDIO_DEVAD_NONE, MII_BMCR, &bmcr);
+	if (!err)
+		err = t3_mdio_read(cphy, MDIO_DEVAD_NONE, MII_BMSR, &status);
+	if (err)
+		return err;
+
+	if (link_ok) {
+		/*
+		 * BMSR_LSTATUS is latch-low, so if it is 0 we need to read it
+		 * once more to get the current link state.
+		 */
+		if (!(status & BMSR_LSTATUS))
+			err = t3_mdio_read(cphy, MDIO_DEVAD_NONE, MII_BMSR,
+					   &status);
+		if (err)
+			return err;
+		*link_ok = (status & BMSR_LSTATUS) != 0;
+	}
+	if (!(bmcr & BMCR_ANENABLE)) {
+		dplx = (bmcr & BMCR_FULLDPLX) ? DUPLEX_FULL : DUPLEX_HALF;
+		if (bmcr & BMCR_SPEED1000)
+			sp = SPEED_1000;
+		else if (bmcr & BMCR_SPEED100)
+			sp = SPEED_100;
+		else
+			sp = SPEED_10;
+	} else if (status & BMSR_ANEGCOMPLETE) {
+		err = t3_mdio_read(cphy, MDIO_DEVAD_NONE, MII_LPA, &lpa);
+		if (!err)
+			err = t3_mdio_read(cphy, MDIO_DEVAD_NONE, MII_ADVERTISE,
+					   &adv);
+		if (err)
+			return err;
+
+		if (adv & lpa & ADVERTISE_1000XFULL) {
+			dplx = DUPLEX_FULL;
+			sp = SPEED_1000;
+		} else if (adv & lpa & ADVERTISE_1000XHALF) {
+			dplx = DUPLEX_HALF;
+			sp = SPEED_1000;
+		}
+
+		if (fc && dplx == DUPLEX_FULL) {
+			if (lpa & adv & ADVERTISE_1000XPAUSE)
+				pause = PAUSE_RX | PAUSE_TX;
+			else if ((lpa & ADVERTISE_1000XPAUSE) &&
+				 (adv & lpa & ADVERTISE_1000XPSE_ASYM))
+				pause = PAUSE_TX;
+			else if ((lpa & ADVERTISE_1000XPSE_ASYM) &&
+				 (adv & ADVERTISE_1000XPAUSE))
+				pause = PAUSE_RX;
+		}
+	}
+	if (speed)
+		*speed = sp;
+	if (duplex)
+		*duplex = dplx;
+	if (fc)
+		*fc = pause;
+	return 0;
+}
+
+#ifdef UNUSED
+/*
+ * Enable/disable auto MDI/MDI-X in forced link speed mode.
+ */
+static int vsc8211_set_automdi(struct cphy *phy, int enable)
+{
+	int err;
+
+	err = t3_mdio_write(phy, MDIO_DEVAD_NONE, VSC8211_EXT_PAGE_AXS, 0x52b5);
+	if (err)
+		return err;
+
+	err = t3_mdio_write(phy, MDIO_DEVAD_NONE, 18, 0x12);
+	if (err)
+		return err;
+
+	err = t3_mdio_write(phy, MDIO_DEVAD_NONE, 17, enable ? 0x2803 : 0x3003);
+	if (err)
+		return err;
+
+	err = t3_mdio_write(phy, MDIO_DEVAD_NONE, 16, 0x87fa);
+	if (err)
+		return err;
+
+	err = t3_mdio_write(phy, MDIO_DEVAD_NONE, VSC8211_EXT_PAGE_AXS, 0);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+int vsc8211_set_speed_duplex(struct cphy *phy, int speed, int duplex)
+{
+	int err;
+
+	err = t3_set_phy_speed_duplex(phy, speed, duplex);
+	if (!err)
+		err = vsc8211_set_automdi(phy, 1);
+	return err;
+}
+#endif /* UNUSED */
+
+static int vsc8211_power_down(struct cphy *cphy, int enable)
+{
+	return t3_mdio_change_bits(cphy, 0, MII_BMCR, BMCR_PDOWN,
+				   enable ? BMCR_PDOWN : 0);
+}
+
+static int vsc8211_intr_handler(struct cphy *cphy)
+{
+	unsigned int cause;
+	int err, cphy_cause = 0;
+
+	err = t3_mdio_read(cphy, MDIO_DEVAD_NONE, VSC8211_INTR_STATUS, &cause);
+	if (err)
+		return err;
+
+	cause &= INTR_MASK;
+	if (cause & CFG_CHG_INTR_MASK)
+		cphy_cause |= cphy_cause_link_change;
+	if (cause & (VSC_INTR_RX_FIFO | VSC_INTR_TX_FIFO))
+		cphy_cause |= cphy_cause_fifo_error;
+	return cphy_cause;
+}
+
+static const struct cphy_ops vsc8211_ops = {
+	.reset = vsc8211_reset,
+	.intr_enable = vsc8211_intr_enable,
+	.intr_disable = vsc8211_intr_disable,
+	.intr_clear = vsc8211_intr_clear,
+	.intr_handler = vsc8211_intr_handler,
+	.autoneg_enable = vsc8211_autoneg_enable,
+	.autoneg_restart = vsc8211_autoneg_restart,
+	.advertise = t3_phy_advertise,
+	.set_speed_duplex = t3_set_phy_speed_duplex,
+	.get_link_status = vsc8211_get_link_status,
+	.power_down = vsc8211_power_down,
+};
+
+static const struct cphy_ops vsc8211_fiber_ops = {
+	.reset = vsc8211_reset,
+	.intr_enable = vsc8211_intr_enable,
+	.intr_disable = vsc8211_intr_disable,
+	.intr_clear = vsc8211_intr_clear,
+	.intr_handler = vsc8211_intr_handler,
+	.autoneg_enable = vsc8211_autoneg_enable,
+	.autoneg_restart = vsc8211_autoneg_restart,
+	.advertise = t3_phy_advertise_fiber,
+	.set_speed_duplex = t3_set_phy_speed_duplex,
+	.get_link_status = vsc8211_get_link_status_fiber,
+	.power_down = vsc8211_power_down,
+};
+
+int t3_vsc8211_phy_prep(struct cphy *phy, struct adapter *adapter,
+			int phy_addr, const struct mdio_ops *mdio_ops)
+{
+	int err;
+	unsigned int val;
+
+	cphy_init(phy, adapter, phy_addr, &vsc8211_ops, mdio_ops,
+		  SUPPORTED_10baseT_Full | SUPPORTED_100baseT_Full |
+		  SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_MII |
+		  SUPPORTED_TP | SUPPORTED_IRQ, "10/100/1000BASE-T");
+	msleep(20);       /* PHY needs ~10ms to start responding to MDIO */
+
+	err = t3_mdio_read(phy, MDIO_DEVAD_NONE, VSC8211_EXT_CTRL, &val);
+	if (err)
+		return err;
+	if (val & VSC_CTRL_MEDIA_MODE_HI) {
+		/* copper interface, just need to configure the LEDs */
+		return t3_mdio_write(phy, MDIO_DEVAD_NONE, VSC8211_LED_CTRL,
+				     0x100);
+	}
+
+	phy->caps = SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg |
+		    SUPPORTED_MII | SUPPORTED_FIBRE | SUPPORTED_IRQ;
+	phy->desc = "1000BASE-X";
+	phy->ops = &vsc8211_fiber_ops;
+
+	err = t3_mdio_write(phy, MDIO_DEVAD_NONE, VSC8211_EXT_PAGE_AXS, 1);
+	if (err)
+		return err;
+
+	err = t3_mdio_write(phy, MDIO_DEVAD_NONE, VSC8211_SIGDET_CTRL, 1);
+	if (err)
+		return err;
+
+	err = t3_mdio_write(phy, MDIO_DEVAD_NONE, VSC8211_EXT_PAGE_AXS, 0);
+	if (err)
+		return err;
+
+	err = t3_mdio_write(phy, MDIO_DEVAD_NONE, VSC8211_EXT_CTRL,
+			    val | VSC_CTRL_CLAUSE37_VIEW);
+	if (err)
+		return err;
+
+	err = vsc8211_reset(phy, 0);
+	if (err)
+		return err;
+
+	udelay(5); /* delay after reset before next SMI */
+	return 0;
+}