93272e07d8
this will allow to detect the link between the switch and the soc Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Cc: netdev@vger.kernel.org Signed-off-by: David S. Miller <davem@davemloft.net>
282 lines
7.8 KiB
C
282 lines
7.8 KiB
C
/*
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* drivers/net/phy/micrel.c
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*
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* Driver for Micrel PHYs
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*
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* Author: David J. Choi
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*
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* Copyright (c) 2010 Micrel, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* Support : ksz9021 1000/100/10 phy from Micrel
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* ks8001, ks8737, ks8721, ks8041, ks8051 100/10 phy
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/phy.h>
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#include <linux/micrel_phy.h>
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/* Operation Mode Strap Override */
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#define MII_KSZPHY_OMSO 0x16
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#define KSZPHY_OMSO_B_CAST_OFF (1 << 9)
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#define KSZPHY_OMSO_RMII_OVERRIDE (1 << 1)
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#define KSZPHY_OMSO_MII_OVERRIDE (1 << 0)
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/* general Interrupt control/status reg in vendor specific block. */
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#define MII_KSZPHY_INTCS 0x1B
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#define KSZPHY_INTCS_JABBER (1 << 15)
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#define KSZPHY_INTCS_RECEIVE_ERR (1 << 14)
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#define KSZPHY_INTCS_PAGE_RECEIVE (1 << 13)
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#define KSZPHY_INTCS_PARELLEL (1 << 12)
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#define KSZPHY_INTCS_LINK_PARTNER_ACK (1 << 11)
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#define KSZPHY_INTCS_LINK_DOWN (1 << 10)
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#define KSZPHY_INTCS_REMOTE_FAULT (1 << 9)
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#define KSZPHY_INTCS_LINK_UP (1 << 8)
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#define KSZPHY_INTCS_ALL (KSZPHY_INTCS_LINK_UP |\
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KSZPHY_INTCS_LINK_DOWN)
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/* general PHY control reg in vendor specific block. */
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#define MII_KSZPHY_CTRL 0x1F
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/* bitmap of PHY register to set interrupt mode */
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#define KSZPHY_CTRL_INT_ACTIVE_HIGH (1 << 9)
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#define KSZ9021_CTRL_INT_ACTIVE_HIGH (1 << 14)
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#define KS8737_CTRL_INT_ACTIVE_HIGH (1 << 14)
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#define KSZ8051_RMII_50MHZ_CLK (1 << 7)
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static int kszphy_ack_interrupt(struct phy_device *phydev)
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{
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/* bit[7..0] int status, which is a read and clear register. */
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int rc;
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rc = phy_read(phydev, MII_KSZPHY_INTCS);
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return (rc < 0) ? rc : 0;
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}
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static int kszphy_set_interrupt(struct phy_device *phydev)
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{
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int temp;
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temp = (PHY_INTERRUPT_ENABLED == phydev->interrupts) ?
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KSZPHY_INTCS_ALL : 0;
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return phy_write(phydev, MII_KSZPHY_INTCS, temp);
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}
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static int kszphy_config_intr(struct phy_device *phydev)
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{
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int temp, rc;
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/* set the interrupt pin active low */
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temp = phy_read(phydev, MII_KSZPHY_CTRL);
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temp &= ~KSZPHY_CTRL_INT_ACTIVE_HIGH;
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phy_write(phydev, MII_KSZPHY_CTRL, temp);
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rc = kszphy_set_interrupt(phydev);
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return rc < 0 ? rc : 0;
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}
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static int ksz9021_config_intr(struct phy_device *phydev)
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{
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int temp, rc;
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/* set the interrupt pin active low */
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temp = phy_read(phydev, MII_KSZPHY_CTRL);
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temp &= ~KSZ9021_CTRL_INT_ACTIVE_HIGH;
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phy_write(phydev, MII_KSZPHY_CTRL, temp);
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rc = kszphy_set_interrupt(phydev);
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return rc < 0 ? rc : 0;
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}
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static int ks8737_config_intr(struct phy_device *phydev)
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{
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int temp, rc;
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/* set the interrupt pin active low */
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temp = phy_read(phydev, MII_KSZPHY_CTRL);
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temp &= ~KS8737_CTRL_INT_ACTIVE_HIGH;
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phy_write(phydev, MII_KSZPHY_CTRL, temp);
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rc = kszphy_set_interrupt(phydev);
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return rc < 0 ? rc : 0;
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}
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static int kszphy_config_init(struct phy_device *phydev)
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{
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return 0;
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}
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static int ksz8021_config_init(struct phy_device *phydev)
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{
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const u16 val = KSZPHY_OMSO_B_CAST_OFF | KSZPHY_OMSO_RMII_OVERRIDE;
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phy_write(phydev, MII_KSZPHY_OMSO, val);
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return 0;
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}
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static int ks8051_config_init(struct phy_device *phydev)
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{
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int regval;
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if (phydev->dev_flags & MICREL_PHY_50MHZ_CLK) {
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regval = phy_read(phydev, MII_KSZPHY_CTRL);
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regval |= KSZ8051_RMII_50MHZ_CLK;
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phy_write(phydev, MII_KSZPHY_CTRL, regval);
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}
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return 0;
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}
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#define KSZ8873MLL_GLOBAL_CONTROL_4 0x06
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#define KSZ8873MLL_GLOBAL_CONTROL_4_DUPLEX (1 << 6)
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#define KSZ8873MLL_GLOBAL_CONTROL_4_SPEED (1 << 4)
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int ksz8873mll_read_status(struct phy_device *phydev)
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{
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int regval;
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/* dummy read */
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regval = phy_read(phydev, KSZ8873MLL_GLOBAL_CONTROL_4);
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regval = phy_read(phydev, KSZ8873MLL_GLOBAL_CONTROL_4);
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if (regval & KSZ8873MLL_GLOBAL_CONTROL_4_DUPLEX)
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phydev->duplex = DUPLEX_HALF;
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else
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phydev->duplex = DUPLEX_FULL;
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if (regval & KSZ8873MLL_GLOBAL_CONTROL_4_SPEED)
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phydev->speed = SPEED_10;
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else
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phydev->speed = SPEED_100;
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phydev->link = 1;
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phydev->pause = phydev->asym_pause = 0;
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return 0;
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}
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static int ksz8873mll_config_aneg(struct phy_device *phydev)
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{
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return 0;
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}
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static struct phy_driver ksphy_driver[] = {
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{
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.phy_id = PHY_ID_KS8737,
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.phy_id_mask = 0x00fffff0,
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.name = "Micrel KS8737",
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.features = (PHY_BASIC_FEATURES | SUPPORTED_Pause),
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.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
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.config_init = kszphy_config_init,
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.config_aneg = genphy_config_aneg,
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.read_status = genphy_read_status,
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.ack_interrupt = kszphy_ack_interrupt,
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.config_intr = ks8737_config_intr,
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.driver = { .owner = THIS_MODULE,},
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}, {
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.phy_id = PHY_ID_KSZ8021,
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.phy_id_mask = 0x00ffffff,
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.name = "Micrel KSZ8021",
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.features = (PHY_BASIC_FEATURES | SUPPORTED_Pause |
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SUPPORTED_Asym_Pause),
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.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
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.config_init = ksz8021_config_init,
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.config_aneg = genphy_config_aneg,
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.read_status = genphy_read_status,
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.ack_interrupt = kszphy_ack_interrupt,
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.config_intr = kszphy_config_intr,
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.driver = { .owner = THIS_MODULE,},
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}, {
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.phy_id = PHY_ID_KSZ8041,
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.phy_id_mask = 0x00fffff0,
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.name = "Micrel KSZ8041",
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.features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
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| SUPPORTED_Asym_Pause),
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.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
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.config_init = kszphy_config_init,
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.config_aneg = genphy_config_aneg,
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.read_status = genphy_read_status,
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.ack_interrupt = kszphy_ack_interrupt,
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.config_intr = kszphy_config_intr,
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.driver = { .owner = THIS_MODULE,},
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}, {
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.phy_id = PHY_ID_KSZ8051,
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.phy_id_mask = 0x00fffff0,
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.name = "Micrel KSZ8051",
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.features = (PHY_BASIC_FEATURES | SUPPORTED_Pause
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| SUPPORTED_Asym_Pause),
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.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
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.config_init = ks8051_config_init,
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.config_aneg = genphy_config_aneg,
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.read_status = genphy_read_status,
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.ack_interrupt = kszphy_ack_interrupt,
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.config_intr = kszphy_config_intr,
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.driver = { .owner = THIS_MODULE,},
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}, {
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.phy_id = PHY_ID_KSZ8001,
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.name = "Micrel KSZ8001 or KS8721",
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.phy_id_mask = 0x00ffffff,
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.features = (PHY_BASIC_FEATURES | SUPPORTED_Pause),
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.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
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.config_init = kszphy_config_init,
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.config_aneg = genphy_config_aneg,
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.read_status = genphy_read_status,
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.ack_interrupt = kszphy_ack_interrupt,
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.config_intr = kszphy_config_intr,
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.driver = { .owner = THIS_MODULE,},
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}, {
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.phy_id = PHY_ID_KSZ9021,
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.phy_id_mask = 0x000ffffe,
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.name = "Micrel KSZ9021 Gigabit PHY",
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.features = (PHY_GBIT_FEATURES | SUPPORTED_Pause
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| SUPPORTED_Asym_Pause),
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.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
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.config_init = kszphy_config_init,
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.config_aneg = genphy_config_aneg,
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.read_status = genphy_read_status,
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.ack_interrupt = kszphy_ack_interrupt,
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.config_intr = ksz9021_config_intr,
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.driver = { .owner = THIS_MODULE, },
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}, {
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.phy_id = PHY_ID_KSZ8873MLL,
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.phy_id_mask = 0x00fffff0,
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.name = "Micrel KSZ8873MLL Switch",
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.features = (SUPPORTED_Pause | SUPPORTED_Asym_Pause),
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.flags = PHY_HAS_MAGICANEG,
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.config_init = kszphy_config_init,
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.config_aneg = ksz8873mll_config_aneg,
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.read_status = ksz8873mll_read_status,
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.driver = { .owner = THIS_MODULE, },
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} };
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static int __init ksphy_init(void)
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{
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return phy_drivers_register(ksphy_driver,
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ARRAY_SIZE(ksphy_driver));
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}
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static void __exit ksphy_exit(void)
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{
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phy_drivers_unregister(ksphy_driver,
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ARRAY_SIZE(ksphy_driver));
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}
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module_init(ksphy_init);
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module_exit(ksphy_exit);
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MODULE_DESCRIPTION("Micrel PHY driver");
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MODULE_AUTHOR("David J. Choi");
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MODULE_LICENSE("GPL");
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static struct mdio_device_id __maybe_unused micrel_tbl[] = {
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{ PHY_ID_KSZ9021, 0x000ffffe },
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{ PHY_ID_KSZ8001, 0x00ffffff },
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{ PHY_ID_KS8737, 0x00fffff0 },
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{ PHY_ID_KSZ8021, 0x00ffffff },
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{ PHY_ID_KSZ8041, 0x00fffff0 },
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{ PHY_ID_KSZ8051, 0x00fffff0 },
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{ PHY_ID_KSZ8873MLL, 0x00fffff0 },
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{ }
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};
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MODULE_DEVICE_TABLE(mdio, micrel_tbl);
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