462 lines
13 KiB
C
462 lines
13 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) 2010-2013 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 : Micrel Phys:
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* Giga phys: ksz9021, ksz9031
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* 100/10 Phys : ksz8001, ksz8721, ksz8737, ksz8041
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* ksz8021, ksz8031, ksz8051,
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* ksz8081, ksz8091,
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* ksz8061,
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* Switch : ksz8873, ksz886x
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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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#include <linux/of.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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/* Write/read to/from extended registers */
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#define MII_KSZPHY_EXTREG 0x0b
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#define KSZPHY_EXTREG_WRITE 0x8000
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#define MII_KSZPHY_EXTREG_WRITE 0x0c
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#define MII_KSZPHY_EXTREG_READ 0x0d
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/* Extended registers */
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#define MII_KSZPHY_CLK_CONTROL_PAD_SKEW 0x104
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#define MII_KSZPHY_RX_DATA_PAD_SKEW 0x105
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#define MII_KSZPHY_TX_DATA_PAD_SKEW 0x106
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#define PS_TO_REG 200
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static int ksz_config_flags(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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return 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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static int kszphy_extended_write(struct phy_device *phydev,
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u32 regnum, u16 val)
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{
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phy_write(phydev, MII_KSZPHY_EXTREG, KSZPHY_EXTREG_WRITE | regnum);
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return phy_write(phydev, MII_KSZPHY_EXTREG_WRITE, val);
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}
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static int kszphy_extended_read(struct phy_device *phydev,
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u32 regnum)
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{
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phy_write(phydev, MII_KSZPHY_EXTREG, regnum);
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return phy_read(phydev, MII_KSZPHY_EXTREG_READ);
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}
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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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int rc;
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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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rc = ksz_config_flags(phydev);
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return rc < 0 ? rc : 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 rc;
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rc = ksz_config_flags(phydev);
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return rc < 0 ? rc : 0;
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}
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static int ksz9021_load_values_from_of(struct phy_device *phydev,
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struct device_node *of_node, u16 reg,
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char *field1, char *field2,
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char *field3, char *field4)
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{
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int val1 = -1;
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int val2 = -2;
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int val3 = -3;
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int val4 = -4;
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int newval;
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int matches = 0;
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if (!of_property_read_u32(of_node, field1, &val1))
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matches++;
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if (!of_property_read_u32(of_node, field2, &val2))
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matches++;
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if (!of_property_read_u32(of_node, field3, &val3))
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matches++;
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if (!of_property_read_u32(of_node, field4, &val4))
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matches++;
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if (!matches)
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return 0;
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if (matches < 4)
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newval = kszphy_extended_read(phydev, reg);
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else
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newval = 0;
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if (val1 != -1)
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newval = ((newval & 0xfff0) | ((val1 / PS_TO_REG) & 0xf) << 0);
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if (val2 != -1)
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newval = ((newval & 0xff0f) | ((val2 / PS_TO_REG) & 0xf) << 4);
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if (val3 != -1)
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newval = ((newval & 0xf0ff) | ((val3 / PS_TO_REG) & 0xf) << 8);
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if (val4 != -1)
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newval = ((newval & 0x0fff) | ((val4 / PS_TO_REG) & 0xf) << 12);
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return kszphy_extended_write(phydev, reg, newval);
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}
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static int ksz9021_config_init(struct phy_device *phydev)
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{
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struct device *dev = &phydev->dev;
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struct device_node *of_node = dev->of_node;
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if (!of_node && dev->parent->of_node)
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of_node = dev->parent->of_node;
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if (of_node) {
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ksz9021_load_values_from_of(phydev, of_node,
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MII_KSZPHY_CLK_CONTROL_PAD_SKEW,
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"txen-skew-ps", "txc-skew-ps",
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"rxdv-skew-ps", "rxc-skew-ps");
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ksz9021_load_values_from_of(phydev, of_node,
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MII_KSZPHY_RX_DATA_PAD_SKEW,
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"rxd0-skew-ps", "rxd1-skew-ps",
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"rxd2-skew-ps", "rxd3-skew-ps");
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ksz9021_load_values_from_of(phydev, of_node,
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MII_KSZPHY_TX_DATA_PAD_SKEW,
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"txd0-skew-ps", "txd1-skew-ps",
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"txd2-skew-ps", "txd3-skew-ps");
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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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static 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 or KSZ8031",
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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_KSZ8031,
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.phy_id_mask = 0x00ffffff,
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.name = "Micrel KSZ8031",
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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_KSZ8081,
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.name = "Micrel KSZ8081 or KSZ8091",
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.phy_id_mask = 0x00fffff0,
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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_KSZ8061,
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.name = "Micrel KSZ8061",
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.phy_id_mask = 0x00fffff0,
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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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.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
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.config_init = ksz9021_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_KSZ9031,
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.phy_id_mask = 0x00fffff0,
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.name = "Micrel KSZ9031 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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.phy_id = PHY_ID_KSZ886X,
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.phy_id_mask = 0x00fffff0,
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.name = "Micrel KSZ886X Switch",
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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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.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_KSZ9031, 0x00fffff0 },
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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_KSZ8031, 0x00ffffff },
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{ PHY_ID_KSZ8041, 0x00fffff0 },
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{ PHY_ID_KSZ8051, 0x00fffff0 },
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{ PHY_ID_KSZ8061, 0x00fffff0 },
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{ PHY_ID_KSZ8081, 0x00fffff0 },
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{ PHY_ID_KSZ8873MLL, 0x00fffff0 },
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{ PHY_ID_KSZ886X, 0x00fffff0 },
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{ }
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};
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MODULE_DEVICE_TABLE(mdio, micrel_tbl);
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