--- /dev/null
+/*
+ * This file is part of the Chelsio T2 Ethernet driver.
+ *
+ * Copyright (C) 2005 Chelsio Communications. All rights reserved.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the LICENSE file included in this
+ * release for licensing terms and conditions.
+ */
+
+#include "common.h"
+#include "cphy.h"
+#include "elmer0.h"
+
+#ifndef ADVERTISE_PAUSE_CAP
+# define ADVERTISE_PAUSE_CAP 0x400
+#endif
+#ifndef ADVERTISE_PAUSE_ASYM
+# define ADVERTISE_PAUSE_ASYM 0x800
+#endif
+
+/* Gigabit MII registers */
+#ifndef MII_CTRL1000
+# define MII_CTRL1000 9
+#endif
+
+#ifndef ADVERTISE_1000FULL
+# define ADVERTISE_1000FULL 0x200
+# define ADVERTISE_1000HALF 0x100
+#endif
+
+/* VSC8244 PHY specific registers. */
+enum {
+ VSC8244_INTR_ENABLE = 25,
+ VSC8244_INTR_STATUS = 26,
+ VSC8244_AUX_CTRL_STAT = 28,
+};
+
+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_LINK_CHG = 1 << 13, /* link change */
+ VSC_INTR_ENABLE = 1 << 15, /* interrupt enable */
+};
+
+#define CFG_CHG_INTR_MASK (VSC_INTR_LINK_CHG | VSC_INTR_NEG_ERR | \
+ 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 vsc8244_reset(struct cphy *cphy, int wait)
+{
+ int err;
+ unsigned int ctl;
+
+ err = simple_mdio_read(cphy, MII_BMCR, &ctl);
+ if (err)
+ return err;
+
+ ctl &= ~BMCR_PDOWN;
+ ctl |= BMCR_RESET;
+ return simple_mdio_write(cphy, MII_BMCR, ctl);
+}
+
+static int vsc8244_intr_enable(struct cphy *cphy)
+{
+ simple_mdio_write(cphy, VSC8244_INTR_ENABLE, INTR_MASK);
+
+ /* Enable interrupts through Elmer */
+ if (t1_is_asic(cphy->adapter)) {
+ u32 elmer;
+
+ t1_tpi_read(cphy->adapter, A_ELMER0_INT_ENABLE, &elmer);
+ elmer |= ELMER0_GP_BIT1;
+ if (is_T2(cphy->adapter)) {
+ elmer |= ELMER0_GP_BIT2|ELMER0_GP_BIT3|ELMER0_GP_BIT4;
+ }
+ t1_tpi_write(cphy->adapter, A_ELMER0_INT_ENABLE, elmer);
+ }
+
+ return 0;
+}
+
+static int vsc8244_intr_disable(struct cphy *cphy)
+{
+ simple_mdio_write(cphy, VSC8244_INTR_ENABLE, 0);
+
+ if (t1_is_asic(cphy->adapter)) {
+ u32 elmer;
+
+ t1_tpi_read(cphy->adapter, A_ELMER0_INT_ENABLE, &elmer);
+ elmer &= ~ELMER0_GP_BIT1;
+ if (is_T2(cphy->adapter)) {
+ elmer &= ~(ELMER0_GP_BIT2|ELMER0_GP_BIT3|ELMER0_GP_BIT4);
+ }
+ t1_tpi_write(cphy->adapter, A_ELMER0_INT_ENABLE, elmer);
+ }
+
+ return 0;
+}
+
+static int vsc8244_intr_clear(struct cphy *cphy)
+{
+ u32 val;
+ u32 elmer;
+
+ /* Clear PHY interrupts by reading the register. */
+ simple_mdio_read(cphy, VSC8244_INTR_ENABLE, &val);
+
+ if (t1_is_asic(cphy->adapter)) {
+ t1_tpi_read(cphy->adapter, A_ELMER0_INT_CAUSE, &elmer);
+ elmer |= ELMER0_GP_BIT1;
+ if (is_T2(cphy->adapter)) {
+ elmer |= ELMER0_GP_BIT2|ELMER0_GP_BIT3|ELMER0_GP_BIT4;
+ }
+ t1_tpi_write(cphy->adapter, A_ELMER0_INT_CAUSE, elmer);
+ }
+
+ return 0;
+}
+
+/*
+ * Force the PHY speed and duplex. This also disables auto-negotiation, except
+ * for 1Gb/s, where auto-negotiation is mandatory.
+ */
+static int vsc8244_set_speed_duplex(struct cphy *phy, int speed, int duplex)
+{
+ int err;
+ unsigned int ctl;
+
+ err = simple_mdio_read(phy, MII_BMCR, &ctl);
+ if (err)
+ return err;
+
+ if (speed >= 0) {
+ ctl &= ~(BMCR_SPEED100 | BMCR_SPEED1000 | BMCR_ANENABLE);
+ if (speed == SPEED_100)
+ ctl |= BMCR_SPEED100;
+ else if (speed == SPEED_1000)
+ ctl |= BMCR_SPEED1000;
+ }
+ if (duplex >= 0) {
+ ctl &= ~(BMCR_FULLDPLX | BMCR_ANENABLE);
+ if (duplex == DUPLEX_FULL)
+ ctl |= BMCR_FULLDPLX;
+ }
+ if (ctl & BMCR_SPEED1000) /* auto-negotiation required for 1Gb/s */
+ ctl |= BMCR_ANENABLE;
+ return simple_mdio_write(phy, MII_BMCR, ctl);
+}
+
+int t1_mdio_set_bits(struct cphy *phy, int mmd, int reg, unsigned int bits)
+{
+ int ret;
+ unsigned int val;
+
+ ret = mdio_read(phy, mmd, reg, &val);
+ if (!ret)
+ ret = mdio_write(phy, mmd, reg, val | bits);
+ return ret;
+}
+
+static int vsc8244_autoneg_enable(struct cphy *cphy)
+{
+ return t1_mdio_set_bits(cphy, 0, MII_BMCR,
+ BMCR_ANENABLE | BMCR_ANRESTART);
+}
+
+static int vsc8244_autoneg_restart(struct cphy *cphy)
+{
+ return t1_mdio_set_bits(cphy, 0, MII_BMCR, BMCR_ANRESTART);
+}
+
+static int vsc8244_advertise(struct cphy *phy, unsigned int advertise_map)
+{
+ int err;
+ unsigned int val = 0;
+
+ err = simple_mdio_read(phy, MII_CTRL1000, &val);
+ if (err)
+ return err;
+
+ val &= ~(ADVERTISE_1000HALF | ADVERTISE_1000FULL);
+ if (advertise_map & ADVERTISED_1000baseT_Half)
+ val |= ADVERTISE_1000HALF;
+ if (advertise_map & ADVERTISED_1000baseT_Full)
+ val |= ADVERTISE_1000FULL;
+
+ err = simple_mdio_write(phy, MII_CTRL1000, val);
+ if (err)
+ return err;
+
+ val = 1;
+ if (advertise_map & ADVERTISED_10baseT_Half)
+ val |= ADVERTISE_10HALF;
+ if (advertise_map & ADVERTISED_10baseT_Full)
+ val |= ADVERTISE_10FULL;
+ if (advertise_map & ADVERTISED_100baseT_Half)
+ val |= ADVERTISE_100HALF;
+ if (advertise_map & ADVERTISED_100baseT_Full)
+ val |= ADVERTISE_100FULL;
+ if (advertise_map & ADVERTISED_PAUSE)
+ val |= ADVERTISE_PAUSE_CAP;
+ if (advertise_map & ADVERTISED_ASYM_PAUSE)
+ val |= ADVERTISE_PAUSE_ASYM;
+ return simple_mdio_write(phy, MII_ADVERTISE, val);
+}
+
+static int vsc8244_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 = simple_mdio_read(cphy, MII_BMCR, &bmcr);
+ if (!err)
+ err = simple_mdio_read(cphy, 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 = simple_mdio_read(cphy, 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 = simple_mdio_read(cphy, VSC8244_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 = simple_mdio_read(cphy, MII_LPA, &lpa);
+ if (!err)
+ err = simple_mdio_read(cphy, 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 vsc8244_intr_handler(struct cphy *cphy)
+{
+ unsigned int cause;
+ int err, cphy_cause = 0;
+
+ err = simple_mdio_read(cphy, VSC8244_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 void vsc8244_destroy(struct cphy *cphy)
+{
+ kfree(cphy);
+}
+
+static struct cphy_ops vsc8244_ops = {
+ .destroy = vsc8244_destroy,
+ .reset = vsc8244_reset,
+ .interrupt_enable = vsc8244_intr_enable,
+ .interrupt_disable = vsc8244_intr_disable,
+ .interrupt_clear = vsc8244_intr_clear,
+ .interrupt_handler = vsc8244_intr_handler,
+ .autoneg_enable = vsc8244_autoneg_enable,
+ .autoneg_restart = vsc8244_autoneg_restart,
+ .advertise = vsc8244_advertise,
+ .set_speed_duplex = vsc8244_set_speed_duplex,
+ .get_link_status = vsc8244_get_link_status
+};
+
+static struct cphy* vsc8244_phy_create(adapter_t *adapter, int phy_addr, struct mdio_ops *mdio_ops)
+{
+ struct cphy *cphy = kzalloc(sizeof(*cphy), GFP_KERNEL);
+
+ if (!cphy) return NULL;
+
+ cphy_init(cphy, adapter, phy_addr, &vsc8244_ops, mdio_ops);
+
+ return cphy;
+}
+
+
+static int vsc8244_phy_reset(adapter_t* adapter)
+{
+ return 0;
+}
+
+struct gphy t1_vsc8244_ops = {
+ vsc8244_phy_create,
+ vsc8244_phy_reset
+};
+
+
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