343 lines
8.7 KiB
C
343 lines
8.7 KiB
C
/*
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* Driver for the Texas Instruments DP83822 PHY
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*
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* Copyright (C) 2017 Texas Instruments Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/ethtool.h>
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#include <linux/etherdevice.h>
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#include <linux/kernel.h>
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#include <linux/mii.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/phy.h>
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#include <linux/netdevice.h>
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#define DP83822_PHY_ID 0x2000a240
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#define DP83822_DEVADDR 0x1f
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#define MII_DP83822_PHYSCR 0x11
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#define MII_DP83822_MISR1 0x12
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#define MII_DP83822_MISR2 0x13
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#define MII_DP83822_RESET_CTRL 0x1f
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#define DP83822_HW_RESET BIT(15)
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#define DP83822_SW_RESET BIT(14)
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/* PHYSCR Register Fields */
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#define DP83822_PHYSCR_INT_OE BIT(0) /* Interrupt Output Enable */
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#define DP83822_PHYSCR_INTEN BIT(1) /* Interrupt Enable */
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/* MISR1 bits */
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#define DP83822_RX_ERR_HF_INT_EN BIT(0)
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#define DP83822_FALSE_CARRIER_HF_INT_EN BIT(1)
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#define DP83822_ANEG_COMPLETE_INT_EN BIT(2)
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#define DP83822_DUP_MODE_CHANGE_INT_EN BIT(3)
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#define DP83822_SPEED_CHANGED_INT_EN BIT(4)
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#define DP83822_LINK_STAT_INT_EN BIT(5)
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#define DP83822_ENERGY_DET_INT_EN BIT(6)
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#define DP83822_LINK_QUAL_INT_EN BIT(7)
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/* MISR2 bits */
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#define DP83822_JABBER_DET_INT_EN BIT(0)
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#define DP83822_WOL_PKT_INT_EN BIT(1)
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#define DP83822_SLEEP_MODE_INT_EN BIT(2)
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#define DP83822_MDI_XOVER_INT_EN BIT(3)
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#define DP83822_LB_FIFO_INT_EN BIT(4)
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#define DP83822_PAGE_RX_INT_EN BIT(5)
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#define DP83822_ANEG_ERR_INT_EN BIT(6)
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#define DP83822_EEE_ERROR_CHANGE_INT_EN BIT(7)
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/* INT_STAT1 bits */
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#define DP83822_WOL_INT_EN BIT(4)
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#define DP83822_WOL_INT_STAT BIT(12)
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#define MII_DP83822_RXSOP1 0x04a5
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#define MII_DP83822_RXSOP2 0x04a6
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#define MII_DP83822_RXSOP3 0x04a7
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/* WoL Registers */
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#define MII_DP83822_WOL_CFG 0x04a0
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#define MII_DP83822_WOL_STAT 0x04a1
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#define MII_DP83822_WOL_DA1 0x04a2
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#define MII_DP83822_WOL_DA2 0x04a3
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#define MII_DP83822_WOL_DA3 0x04a4
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/* WoL bits */
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#define DP83822_WOL_MAGIC_EN BIT(0)
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#define DP83822_WOL_SECURE_ON BIT(5)
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#define DP83822_WOL_EN BIT(7)
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#define DP83822_WOL_INDICATION_SEL BIT(8)
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#define DP83822_WOL_CLR_INDICATION BIT(11)
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static int dp83822_ack_interrupt(struct phy_device *phydev)
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{
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int err;
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err = phy_read(phydev, MII_DP83822_MISR1);
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if (err < 0)
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return err;
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err = phy_read(phydev, MII_DP83822_MISR2);
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if (err < 0)
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return err;
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return 0;
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}
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static int dp83822_set_wol(struct phy_device *phydev,
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struct ethtool_wolinfo *wol)
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{
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struct net_device *ndev = phydev->attached_dev;
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u16 value;
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const u8 *mac;
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if (wol->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE)) {
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mac = (const u8 *)ndev->dev_addr;
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if (!is_valid_ether_addr(mac))
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return -EINVAL;
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/* MAC addresses start with byte 5, but stored in mac[0].
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* 822 PHYs store bytes 4|5, 2|3, 0|1
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*/
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phy_write_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_DA1,
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(mac[1] << 8) | mac[0]);
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phy_write_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_DA2,
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(mac[3] << 8) | mac[2]);
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phy_write_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_DA3,
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(mac[5] << 8) | mac[4]);
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value = phy_read_mmd(phydev, DP83822_DEVADDR,
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MII_DP83822_WOL_CFG);
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if (wol->wolopts & WAKE_MAGIC)
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value |= DP83822_WOL_MAGIC_EN;
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else
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value &= ~DP83822_WOL_MAGIC_EN;
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if (wol->wolopts & WAKE_MAGICSECURE) {
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phy_write_mmd(phydev, DP83822_DEVADDR,
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MII_DP83822_RXSOP1,
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(wol->sopass[1] << 8) | wol->sopass[0]);
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phy_write_mmd(phydev, DP83822_DEVADDR,
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MII_DP83822_RXSOP2,
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(wol->sopass[3] << 8) | wol->sopass[2]);
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phy_write_mmd(phydev, DP83822_DEVADDR,
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MII_DP83822_RXSOP3,
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(wol->sopass[5] << 8) | wol->sopass[4]);
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value |= DP83822_WOL_SECURE_ON;
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} else {
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value &= ~DP83822_WOL_SECURE_ON;
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}
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value |= (DP83822_WOL_EN | DP83822_WOL_INDICATION_SEL |
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DP83822_WOL_CLR_INDICATION);
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phy_write_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_CFG,
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value);
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} else {
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value = phy_read_mmd(phydev, DP83822_DEVADDR,
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MII_DP83822_WOL_CFG);
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value &= ~DP83822_WOL_EN;
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phy_write_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_CFG,
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value);
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}
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return 0;
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}
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static void dp83822_get_wol(struct phy_device *phydev,
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struct ethtool_wolinfo *wol)
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{
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int value;
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u16 sopass_val;
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wol->supported = (WAKE_MAGIC | WAKE_MAGICSECURE);
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wol->wolopts = 0;
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value = phy_read_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_CFG);
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if (value & DP83822_WOL_MAGIC_EN)
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wol->wolopts |= WAKE_MAGIC;
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if (value & DP83822_WOL_SECURE_ON) {
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sopass_val = phy_read_mmd(phydev, DP83822_DEVADDR,
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MII_DP83822_RXSOP1);
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wol->sopass[0] = (sopass_val & 0xff);
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wol->sopass[1] = (sopass_val >> 8);
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sopass_val = phy_read_mmd(phydev, DP83822_DEVADDR,
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MII_DP83822_RXSOP2);
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wol->sopass[2] = (sopass_val & 0xff);
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wol->sopass[3] = (sopass_val >> 8);
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sopass_val = phy_read_mmd(phydev, DP83822_DEVADDR,
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MII_DP83822_RXSOP3);
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wol->sopass[4] = (sopass_val & 0xff);
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wol->sopass[5] = (sopass_val >> 8);
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wol->wolopts |= WAKE_MAGICSECURE;
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}
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/* WoL is not enabled so set wolopts to 0 */
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if (!(value & DP83822_WOL_EN))
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wol->wolopts = 0;
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}
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static int dp83822_config_intr(struct phy_device *phydev)
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{
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int misr_status;
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int physcr_status;
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int err;
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if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
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misr_status = phy_read(phydev, MII_DP83822_MISR1);
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if (misr_status < 0)
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return misr_status;
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misr_status |= (DP83822_RX_ERR_HF_INT_EN |
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DP83822_FALSE_CARRIER_HF_INT_EN |
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DP83822_ANEG_COMPLETE_INT_EN |
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DP83822_DUP_MODE_CHANGE_INT_EN |
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DP83822_SPEED_CHANGED_INT_EN |
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DP83822_LINK_STAT_INT_EN |
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DP83822_ENERGY_DET_INT_EN |
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DP83822_LINK_QUAL_INT_EN);
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err = phy_write(phydev, MII_DP83822_MISR1, misr_status);
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if (err < 0)
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return err;
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misr_status = phy_read(phydev, MII_DP83822_MISR2);
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if (misr_status < 0)
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return misr_status;
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misr_status |= (DP83822_JABBER_DET_INT_EN |
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DP83822_WOL_PKT_INT_EN |
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DP83822_SLEEP_MODE_INT_EN |
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DP83822_MDI_XOVER_INT_EN |
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DP83822_LB_FIFO_INT_EN |
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DP83822_PAGE_RX_INT_EN |
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DP83822_ANEG_ERR_INT_EN |
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DP83822_EEE_ERROR_CHANGE_INT_EN);
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err = phy_write(phydev, MII_DP83822_MISR2, misr_status);
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if (err < 0)
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return err;
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physcr_status = phy_read(phydev, MII_DP83822_PHYSCR);
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if (physcr_status < 0)
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return physcr_status;
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physcr_status |= DP83822_PHYSCR_INT_OE | DP83822_PHYSCR_INTEN;
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} else {
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err = phy_write(phydev, MII_DP83822_MISR1, 0);
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if (err < 0)
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return err;
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err = phy_write(phydev, MII_DP83822_MISR1, 0);
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if (err < 0)
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return err;
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physcr_status = phy_read(phydev, MII_DP83822_PHYSCR);
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if (physcr_status < 0)
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return physcr_status;
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physcr_status &= ~DP83822_PHYSCR_INTEN;
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}
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return phy_write(phydev, MII_DP83822_PHYSCR, physcr_status);
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}
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static int dp83822_config_init(struct phy_device *phydev)
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{
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int err;
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int value;
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err = genphy_config_init(phydev);
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if (err < 0)
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return err;
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value = DP83822_WOL_MAGIC_EN | DP83822_WOL_SECURE_ON | DP83822_WOL_EN;
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return phy_write_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_CFG,
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value);
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}
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static int dp83822_phy_reset(struct phy_device *phydev)
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{
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int err;
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err = phy_write(phydev, MII_DP83822_RESET_CTRL, DP83822_HW_RESET);
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if (err < 0)
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return err;
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dp83822_config_init(phydev);
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return 0;
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}
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static int dp83822_suspend(struct phy_device *phydev)
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{
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int value;
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value = phy_read_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_CFG);
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if (!(value & DP83822_WOL_EN))
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genphy_suspend(phydev);
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return 0;
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}
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static int dp83822_resume(struct phy_device *phydev)
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{
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int value;
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genphy_resume(phydev);
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value = phy_read_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_CFG);
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phy_write_mmd(phydev, DP83822_DEVADDR, MII_DP83822_WOL_CFG, value |
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DP83822_WOL_CLR_INDICATION);
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return 0;
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}
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static struct phy_driver dp83822_driver[] = {
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{
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.phy_id = DP83822_PHY_ID,
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.phy_id_mask = 0xfffffff0,
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.name = "TI DP83822",
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.features = PHY_BASIC_FEATURES,
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.flags = PHY_HAS_INTERRUPT,
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.config_init = dp83822_config_init,
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.soft_reset = dp83822_phy_reset,
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.get_wol = dp83822_get_wol,
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.set_wol = dp83822_set_wol,
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.ack_interrupt = dp83822_ack_interrupt,
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.config_intr = dp83822_config_intr,
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.suspend = dp83822_suspend,
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.resume = dp83822_resume,
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},
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};
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module_phy_driver(dp83822_driver);
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static struct mdio_device_id __maybe_unused dp83822_tbl[] = {
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{ DP83822_PHY_ID, 0xfffffff0 },
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{ },
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};
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MODULE_DEVICE_TABLE(mdio, dp83822_tbl);
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MODULE_DESCRIPTION("Texas Instruments DP83822 PHY driver");
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MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com");
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MODULE_LICENSE("GPL");
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