cxgb3: add support for the Aquantia 10G-BT phy

Add support for the Aquantia AQ1002 10G-BaseT phy.

Signed-off-by: Divy Le Ray <divy@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 359 insertions, 2 deletions

diff --git a/drivers/net/cxgb3/Makefile b/drivers/net/cxgb3/Makefile
index 3434679..29aff78 100644
--- a/drivers/net/cxgb3/Makefile
+++ b/drivers/net/cxgb3/Makefile
@@ -5,4 +5,4 @@
 obj-$(CONFIG_CHELSIO_T3) += cxgb3.o
 
 cxgb3-objs := cxgb3_main.o ael1002.o vsc8211.o t3_hw.o mc5.o \
-	      xgmac.o sge.o l2t.o cxgb3_offload.o
+	      xgmac.o sge.o l2t.o cxgb3_offload.o aq100x.o
diff --git a/drivers/net/cxgb3/aq100x.c b/drivers/net/cxgb3/aq100x.c
new file mode 100644
index 0000000..c51e50d
--- /dev/null
+++ b/drivers/net/cxgb3/aq100x.c
@@ -0,0 +1,355 @@
+/*
+ * 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"
+#include "regs.h"
+
+enum {
+	/* MDIO_DEV_PMA_PMD registers */
+	AQ_LINK_STAT	= 0xe800,
+	AQ_IMASK_PMA	= 0xf000,
+
+	/* MDIO_DEV_XGXS registers */
+	AQ_XAUI_RX_CFG	= 0xc400,
+	AQ_XAUI_TX_CFG	= 0xe400,
+
+	/* MDIO_DEV_ANEG registers */
+	AQ_100M_CTRL	= 0x0010,
+	AQ_10G_CTRL	= 0x0020,
+	AQ_1G_CTRL	= 0xc400,
+	AQ_ANEG_STAT	= 0xc800,
+
+	/* MDIO_DEV_VEND1 registers */
+	AQ_FW_VERSION	= 0x0020,
+	AQ_IFLAG_GLOBAL	= 0xfc00,
+	AQ_IMASK_GLOBAL	= 0xff00,
+};
+
+#define AQBIT(x)	(1 << (x))
+#define IMASK_PMA	AQBIT(0x2)
+#define IMASK_GLOBAL	AQBIT(0xf)
+#define ADV_1G_FULL	AQBIT(0xf)
+#define ADV_1G_HALF	AQBIT(0xe)
+#define ADV_10G_FULL	AQBIT(0xc)
+#define AQ_RESET	(AQBIT(0xe) | AQBIT(0xf))
+#define AQ_LOWPOWER	AQBIT(0xb)
+
+static int aq100x_reset(struct cphy *phy, int wait)
+{
+	/*
+	 * Ignore the caller specified wait time; always wait for the reset to
+	 * complete. Can take up to 3s.
+	 */
+	int err = t3_phy_reset(phy, MDIO_MMD_VEND1, 3000);
+
+	if (err)
+		CH_WARN(phy->adapter, "PHY%d: reset failed (0x%x).\n",
+			phy->mdio.prtad, err);
+
+	return err;
+}
+
+static int aq100x_intr_enable(struct cphy *phy)
+{
+	int err = t3_mdio_write(phy, MDIO_MMD_PMAPMD, AQ_IMASK_PMA, IMASK_PMA);
+	if (err)
+		return err;
+
+	err = t3_mdio_write(phy, MDIO_MMD_VEND1, AQ_IMASK_GLOBAL, IMASK_GLOBAL);
+	return err;
+}
+
+static int aq100x_intr_disable(struct cphy *phy)
+{
+	return t3_mdio_write(phy, MDIO_MMD_VEND1, AQ_IMASK_GLOBAL, 0);
+}
+
+static int aq100x_intr_clear(struct cphy *phy)
+{
+	unsigned int v;
+
+	t3_mdio_read(phy, MDIO_MMD_VEND1, AQ_IFLAG_GLOBAL, &v);
+	t3_mdio_read(phy, MDIO_MMD_PMAPMD, MDIO_STAT1, &v);
+
+	return 0;
+}
+
+static int aq100x_intr_handler(struct cphy *phy)
+{
+	int err;
+	unsigned int cause, v;
+
+	err = t3_mdio_read(phy, MDIO_MMD_VEND1, AQ_IFLAG_GLOBAL, &cause);
+	if (err)
+		return err;
+
+	/* Read (and reset) the latching version of the status */
+	t3_mdio_read(phy, MDIO_MMD_PMAPMD, MDIO_STAT1, &v);
+
+	return cphy_cause_link_change;
+}
+
+static int aq100x_power_down(struct cphy *phy, int off)
+{
+	return mdio_set_flag(&phy->mdio, phy->mdio.prtad,
+			     MDIO_MMD_PMAPMD, MDIO_CTRL1,
+			     MDIO_CTRL1_LPOWER, off);
+}
+
+static int aq100x_autoneg_enable(struct cphy *phy)
+{
+	int err;
+
+	err = aq100x_power_down(phy, 0);
+	if (!err)
+		err = mdio_set_flag(&phy->mdio, phy->mdio.prtad,
+				    MDIO_MMD_AN, MDIO_CTRL1,
+				    BMCR_ANENABLE | BMCR_ANRESTART, 1);
+
+	return err;
+}
+
+static int aq100x_autoneg_restart(struct cphy *phy)
+{
+	int err;
+
+	err = aq100x_power_down(phy, 0);
+	if (!err)
+		err = mdio_set_flag(&phy->mdio, phy->mdio.prtad,
+				    MDIO_MMD_AN, MDIO_CTRL1,
+				    BMCR_ANENABLE | BMCR_ANRESTART, 1);
+
+	return err;
+}
+
+static int aq100x_advertise(struct cphy *phy, unsigned int advertise_map)
+{
+	unsigned int adv;
+	int err;
+
+	/* 10G advertisement */
+	adv = 0;
+	if (advertise_map & ADVERTISED_10000baseT_Full)
+		adv |= ADV_10G_FULL;
+	err = t3_mdio_change_bits(phy, MDIO_MMD_AN, AQ_10G_CTRL,
+				  ADV_10G_FULL, adv);
+	if (err)
+		return err;
+
+	/* 1G advertisement */
+	adv = 0;
+	if (advertise_map & ADVERTISED_1000baseT_Full)
+		adv |= ADV_1G_FULL;
+	if (advertise_map & ADVERTISED_1000baseT_Half)
+		adv |= ADV_1G_HALF;
+	err = t3_mdio_change_bits(phy, MDIO_MMD_AN, AQ_1G_CTRL,
+				  ADV_1G_FULL | ADV_1G_HALF, adv);
+	if (err)
+		return err;
+
+	/* 100M, pause advertisement */
+	adv = 0;
+	if (advertise_map & ADVERTISED_100baseT_Half)
+		adv |= ADVERTISE_100HALF;
+	if (advertise_map & ADVERTISED_100baseT_Full)
+		adv |= ADVERTISE_100FULL;
+	if (advertise_map & ADVERTISED_Pause)
+		adv |= ADVERTISE_PAUSE_CAP;
+	if (advertise_map & ADVERTISED_Asym_Pause)
+		adv |= ADVERTISE_PAUSE_ASYM;
+	err = t3_mdio_change_bits(phy, MDIO_MMD_AN, AQ_100M_CTRL, 0xfe0, adv);
+
+	return err;
+}
+
+static int aq100x_set_loopback(struct cphy *phy, int mmd, int dir, int enable)
+{
+	return mdio_set_flag(&phy->mdio, phy->mdio.prtad,
+			     MDIO_MMD_PMAPMD, MDIO_CTRL1,
+			     BMCR_LOOPBACK, enable);
+}
+
+static int aq100x_set_speed_duplex(struct cphy *phy, int speed, int duplex)
+{
+	/* no can do */
+	return -1;
+}
+
+static int aq100x_get_link_status(struct cphy *phy, int *link_ok,
+				  int *speed, int *duplex, int *fc)
+{
+	int err;
+	unsigned int v;
+
+	if (link_ok) {
+		err = t3_mdio_read(phy, MDIO_MMD_PMAPMD, AQ_LINK_STAT, &v);
+		if (err)
+			return err;
+
+		*link_ok = v & 1;
+		if (!*link_ok)
+			return 0;
+	}
+
+	err = t3_mdio_read(phy, MDIO_MMD_AN, AQ_ANEG_STAT, &v);
+	if (err)
+		return err;
+
+	if (speed) {
+		switch (v & 0x6) {
+		case 0x6:
+			*speed = SPEED_10000;
+			break;
+		case 0x4:
+			*speed = SPEED_1000;
+			break;
+		case 0x2:
+			*speed = SPEED_100;
+			break;
+		case 0x0:
+			*speed = SPEED_10;
+			break;
+		}
+	}
+
+	if (duplex)
+		*duplex = v & 1 ? DUPLEX_FULL : DUPLEX_HALF;
+
+	return 0;
+}
+
+static struct cphy_ops aq100x_ops = {
+	.reset             = aq100x_reset,
+	.intr_enable       = aq100x_intr_enable,
+	.intr_disable      = aq100x_intr_disable,
+	.intr_clear        = aq100x_intr_clear,
+	.intr_handler      = aq100x_intr_handler,
+	.autoneg_enable    = aq100x_autoneg_enable,
+	.autoneg_restart   = aq100x_autoneg_restart,
+	.advertise         = aq100x_advertise,
+	.set_loopback      = aq100x_set_loopback,
+	.set_speed_duplex  = aq100x_set_speed_duplex,
+	.get_link_status   = aq100x_get_link_status,
+	.power_down        = aq100x_power_down,
+	.mmds 		   = MDIO_DEVS_PMAPMD | MDIO_DEVS_PCS | MDIO_DEVS_PHYXS,
+};
+
+int t3_aq100x_phy_prep(struct cphy *phy, struct adapter *adapter, int phy_addr,
+		       const struct mdio_ops *mdio_ops)
+{
+	unsigned int v, v2, gpio, wait;
+	int err;
+
+	cphy_init(phy, adapter, phy_addr, &aq100x_ops, mdio_ops,
+		  SUPPORTED_1000baseT_Full | SUPPORTED_10000baseT_Full |
+		  SUPPORTED_Autoneg | SUPPORTED_AUI, "1000/10GBASE-T");
+
+	/*
+	 * The PHY has been out of reset ever since the system powered up.  So
+	 * we do a hard reset over here.
+	 */
+	gpio = phy_addr ? F_GPIO10_OUT_VAL : F_GPIO6_OUT_VAL;
+	t3_set_reg_field(adapter, A_T3DBG_GPIO_EN, gpio, 0);
+	msleep(1);
+	t3_set_reg_field(adapter, A_T3DBG_GPIO_EN, gpio, gpio);
+
+	/*
+	 * Give it enough time to load the firmware and get ready for mdio.
+	 */
+	msleep(1000);
+	wait = 500; /* in 10ms increments */
+	do {
+		err = t3_mdio_read(phy, MDIO_MMD_VEND1, MDIO_CTRL1, &v);
+		if (err || v == 0xffff) {
+
+			/* Allow prep_adapter to succeed when ffff is read */
+
+			CH_WARN(adapter, "PHY%d: reset failed (0x%x, 0x%x).\n",
+				phy_addr, err, v);
+			goto done;
+		}
+
+		v &= AQ_RESET;
+		if (v)
+			msleep(10);
+	} while (v && --wait);
+	if (v) {
+		CH_WARN(adapter, "PHY%d: reset timed out (0x%x).\n",
+			phy_addr, v);
+
+		goto done; /* let prep_adapter succeed */
+	}
+
+	/* Datasheet says 3s max but this has been observed */
+	wait = (500 - wait) * 10 + 1000;
+	if (wait > 3000)
+		CH_WARN(adapter, "PHY%d: reset took %ums\n", phy_addr, wait);
+
+	/* Firmware version check. */
+	t3_mdio_read(phy, MDIO_MMD_VEND1, AQ_FW_VERSION, &v);
+	if (v != 30) {
+		CH_WARN(adapter, "PHY%d: unsupported firmware %d\n",
+			phy_addr, v);
+		return 0; /* allow t3_prep_adapter to succeed */
+	}
+
+	/*
+	 * The PHY should start in really-low-power mode.  Prepare it for normal
+	 * operations.
+	 */
+	err = t3_mdio_read(phy, MDIO_MMD_VEND1, MDIO_CTRL1, &v);
+	if (err)
+		return err;
+	if (v & AQ_LOWPOWER) {
+		err = t3_mdio_change_bits(phy, MDIO_MMD_VEND1, MDIO_CTRL1,
+					  AQ_LOWPOWER, 0);
+		if (err)
+			return err;
+		msleep(10);
+	} else
+		CH_WARN(adapter, "PHY%d does not start in low power mode.\n",
+			phy_addr);
+
+	/*
+	 * Verify XAUI settings, but let prep succeed no matter what.
+	 */
+	v = v2 = 0;
+	t3_mdio_read(phy, MDIO_MMD_PHYXS, AQ_XAUI_RX_CFG, &v);
+	t3_mdio_read(phy, MDIO_MMD_PHYXS, AQ_XAUI_TX_CFG, &v2);
+	if (v != 0x1b || v2 != 0x1b)
+		CH_WARN(adapter,
+			"PHY%d: incorrect XAUI settings (0x%x, 0x%x).\n",
+			phy_addr, v, v2);
+
+done:
+	return err;
+}
diff --git a/drivers/net/cxgb3/common.h b/drivers/net/cxgb3/common.h
index 301221a..d21b705 100644
--- a/drivers/net/cxgb3/common.h
+++ b/drivers/net/cxgb3/common.h
@@ -808,4 +808,6 @@ int t3_qt2045_phy_prep(struct cphy *phy, struct adapter *adapter, int phy_addr,
 		       const struct mdio_ops *mdio_ops);
 int t3_xaui_direct_phy_prep(struct cphy *phy, struct adapter *adapter,
 			    int phy_addr, const struct mdio_ops *mdio_ops);
+int t3_aq100x_phy_prep(struct cphy *phy, struct adapter *adapter,
+			    int phy_addr, const struct mdio_ops *mdio_ops);
 #endif				/* __CHELSIO_COMMON_H */
diff --git a/drivers/net/cxgb3/t3_hw.c b/drivers/net/cxgb3/t3_hw.c
index 766314c..6a45447 100644
--- a/drivers/net/cxgb3/t3_hw.c
+++ b/drivers/net/cxgb3/t3_hw.c
@@ -557,7 +557,7 @@ static const struct port_type_info port_types[] = {
 	{ t3_qt2045_phy_prep },
 	{ t3_ael1006_phy_prep },
 	{ NULL },
-	{ NULL },
+	{ t3_aq100x_phy_prep },
 	{ t3_ael2020_phy_prep },
 };