6229ed1f22
When WOL is enabled, the chip can't be put into power-down (BMCR_PDOWN) mode, as that will also switch off the MAC, which consequently leads to a link loss. Use BMCR_ISOLATE in that case, which will at least save us some milliamperes in comparison to normal operation mode. Signed-off-by: Daniel Mack <zonque@gmail.com> Acked-by: Mugunthan V N <mugunthanvnm@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
270 lines
6.2 KiB
C
270 lines
6.2 KiB
C
/*
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* drivers/net/phy/at803x.c
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*
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* Driver for Atheros 803x PHY
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*
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* Author: Matus Ujhelyi <ujhelyi.m@gmail.com>
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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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#include <linux/phy.h>
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#define AT803X_INTR_ENABLE 0x12
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#define AT803X_INTR_STATUS 0x13
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#define AT803X_WOL_ENABLE 0x01
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#define AT803X_DEVICE_ADDR 0x03
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#define AT803X_LOC_MAC_ADDR_0_15_OFFSET 0x804C
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#define AT803X_LOC_MAC_ADDR_16_31_OFFSET 0x804B
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#define AT803X_LOC_MAC_ADDR_32_47_OFFSET 0x804A
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#define AT803X_MMD_ACCESS_CONTROL 0x0D
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#define AT803X_MMD_ACCESS_CONTROL_DATA 0x0E
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#define AT803X_FUNC_DATA 0x4003
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#define AT803X_DEBUG_ADDR 0x1D
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#define AT803X_DEBUG_DATA 0x1E
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#define AT803X_DEBUG_SYSTEM_MODE_CTRL 0x05
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#define AT803X_DEBUG_RGMII_TX_CLK_DLY BIT(8)
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MODULE_DESCRIPTION("Atheros 803x PHY driver");
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MODULE_AUTHOR("Matus Ujhelyi");
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MODULE_LICENSE("GPL");
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static int at803x_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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const u8 *mac;
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int ret;
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u32 value;
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unsigned int i, offsets[] = {
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AT803X_LOC_MAC_ADDR_32_47_OFFSET,
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AT803X_LOC_MAC_ADDR_16_31_OFFSET,
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AT803X_LOC_MAC_ADDR_0_15_OFFSET,
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};
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if (!ndev)
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return -ENODEV;
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if (wol->wolopts & WAKE_MAGIC) {
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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 -EFAULT;
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for (i = 0; i < 3; i++) {
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phy_write(phydev, AT803X_MMD_ACCESS_CONTROL,
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AT803X_DEVICE_ADDR);
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phy_write(phydev, AT803X_MMD_ACCESS_CONTROL_DATA,
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offsets[i]);
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phy_write(phydev, AT803X_MMD_ACCESS_CONTROL,
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AT803X_FUNC_DATA);
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phy_write(phydev, AT803X_MMD_ACCESS_CONTROL_DATA,
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mac[(i * 2) + 1] | (mac[(i * 2)] << 8));
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}
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value = phy_read(phydev, AT803X_INTR_ENABLE);
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value |= AT803X_WOL_ENABLE;
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ret = phy_write(phydev, AT803X_INTR_ENABLE, value);
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if (ret)
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return ret;
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value = phy_read(phydev, AT803X_INTR_STATUS);
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} else {
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value = phy_read(phydev, AT803X_INTR_ENABLE);
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value &= (~AT803X_WOL_ENABLE);
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ret = phy_write(phydev, AT803X_INTR_ENABLE, value);
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if (ret)
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return ret;
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value = phy_read(phydev, AT803X_INTR_STATUS);
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}
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return ret;
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}
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static void at803x_get_wol(struct phy_device *phydev,
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struct ethtool_wolinfo *wol)
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{
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u32 value;
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wol->supported = WAKE_MAGIC;
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wol->wolopts = 0;
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value = phy_read(phydev, AT803X_INTR_ENABLE);
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if (value & AT803X_WOL_ENABLE)
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wol->wolopts |= WAKE_MAGIC;
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}
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static int at803x_suspend(struct phy_device *phydev)
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{
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int value;
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int wol_enabled;
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mutex_lock(&phydev->lock);
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value = phy_read(phydev, AT803X_INTR_ENABLE);
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wol_enabled = value & AT803X_WOL_ENABLE;
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value = phy_read(phydev, MII_BMCR);
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if (wol_enabled)
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value |= BMCR_ISOLATE;
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else
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value |= BMCR_PDOWN;
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phy_write(phydev, MII_BMCR, value);
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mutex_unlock(&phydev->lock);
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return 0;
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}
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static int at803x_resume(struct phy_device *phydev)
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{
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int value;
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mutex_lock(&phydev->lock);
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value = phy_read(phydev, MII_BMCR);
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value &= ~(BMCR_PDOWN | BMCR_ISOLATE);
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phy_write(phydev, MII_BMCR, value);
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mutex_unlock(&phydev->lock);
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return 0;
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}
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static int at803x_config_init(struct phy_device *phydev)
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{
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int val;
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int ret;
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u32 features;
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features = SUPPORTED_TP | SUPPORTED_MII | SUPPORTED_AUI |
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SUPPORTED_FIBRE | SUPPORTED_BNC;
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val = phy_read(phydev, MII_BMSR);
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if (val < 0)
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return val;
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if (val & BMSR_ANEGCAPABLE)
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features |= SUPPORTED_Autoneg;
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if (val & BMSR_100FULL)
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features |= SUPPORTED_100baseT_Full;
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if (val & BMSR_100HALF)
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features |= SUPPORTED_100baseT_Half;
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if (val & BMSR_10FULL)
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features |= SUPPORTED_10baseT_Full;
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if (val & BMSR_10HALF)
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features |= SUPPORTED_10baseT_Half;
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if (val & BMSR_ESTATEN) {
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val = phy_read(phydev, MII_ESTATUS);
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if (val < 0)
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return val;
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if (val & ESTATUS_1000_TFULL)
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features |= SUPPORTED_1000baseT_Full;
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if (val & ESTATUS_1000_THALF)
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features |= SUPPORTED_1000baseT_Half;
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}
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phydev->supported = features;
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phydev->advertising = features;
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if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) {
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ret = phy_write(phydev, AT803X_DEBUG_ADDR,
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AT803X_DEBUG_SYSTEM_MODE_CTRL);
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if (ret)
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return ret;
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ret = phy_write(phydev, AT803X_DEBUG_DATA,
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AT803X_DEBUG_RGMII_TX_CLK_DLY);
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if (ret)
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return ret;
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}
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return 0;
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}
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static struct phy_driver at803x_driver[] = {
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{
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/* ATHEROS 8035 */
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.phy_id = 0x004dd072,
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.name = "Atheros 8035 ethernet",
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.phy_id_mask = 0xffffffef,
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.config_init = at803x_config_init,
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.set_wol = at803x_set_wol,
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.get_wol = at803x_get_wol,
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.suspend = at803x_suspend,
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.resume = at803x_resume,
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.features = PHY_GBIT_FEATURES,
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.flags = PHY_HAS_INTERRUPT,
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.config_aneg = genphy_config_aneg,
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.read_status = genphy_read_status,
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.driver = {
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.owner = THIS_MODULE,
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},
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}, {
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/* ATHEROS 8030 */
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.phy_id = 0x004dd076,
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.name = "Atheros 8030 ethernet",
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.phy_id_mask = 0xffffffef,
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.config_init = at803x_config_init,
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.set_wol = at803x_set_wol,
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.get_wol = at803x_get_wol,
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.suspend = at803x_suspend,
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.resume = at803x_resume,
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.features = PHY_GBIT_FEATURES,
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.flags = PHY_HAS_INTERRUPT,
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.config_aneg = genphy_config_aneg,
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.read_status = genphy_read_status,
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.driver = {
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.owner = THIS_MODULE,
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},
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}, {
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/* ATHEROS 8031 */
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.phy_id = 0x004dd074,
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.name = "Atheros 8031 ethernet",
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.phy_id_mask = 0xffffffef,
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.config_init = at803x_config_init,
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.set_wol = at803x_set_wol,
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.get_wol = at803x_get_wol,
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.suspend = at803x_suspend,
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.resume = at803x_resume,
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.features = PHY_GBIT_FEATURES,
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.flags = PHY_HAS_INTERRUPT,
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.config_aneg = genphy_config_aneg,
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.read_status = genphy_read_status,
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.driver = {
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.owner = THIS_MODULE,
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},
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} };
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static int __init atheros_init(void)
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{
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return phy_drivers_register(at803x_driver,
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ARRAY_SIZE(at803x_driver));
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}
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static void __exit atheros_exit(void)
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{
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return phy_drivers_unregister(at803x_driver,
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ARRAY_SIZE(at803x_driver));
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}
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module_init(atheros_init);
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module_exit(atheros_exit);
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static struct mdio_device_id __maybe_unused atheros_tbl[] = {
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{ 0x004dd076, 0xffffffef },
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{ 0x004dd074, 0xffffffef },
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{ 0x004dd072, 0xffffffef },
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{ }
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};
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MODULE_DEVICE_TABLE(mdio, atheros_tbl);
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