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347917c7e0
In preparation of removing the .ack_interrupt() callback, we must replace its occurrences (aka phy_clear_interrupt), from the 2 places where it is called from (phy_enable_interrupts and phy_disable_interrupts), with equivalent functionality. This means that clearing interrupts now becomes something that the PHY driver is responsible of doing, before enabling interrupts and after clearing them. Make this driver follow the new contract. Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
108 lines
2.3 KiB
C
108 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Driver for AMD am79c PHYs
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*
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* Author: Heiko Schocher <hs@denx.de>
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*
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* Copyright (c) 2011 DENX Software Engineering GmbH
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/mii.h>
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#include <linux/phy.h>
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#define PHY_ID_AM79C874 0x0022561b
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#define MII_AM79C_IR 17 /* Interrupt Status/Control Register */
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#define MII_AM79C_IR_EN_LINK 0x0400 /* IR enable Linkstate */
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#define MII_AM79C_IR_EN_ANEG 0x0100 /* IR enable Aneg Complete */
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#define MII_AM79C_IR_IMASK_INIT (MII_AM79C_IR_EN_LINK | MII_AM79C_IR_EN_ANEG)
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#define MII_AM79C_IR_LINK_DOWN BIT(2)
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#define MII_AM79C_IR_ANEG_DONE BIT(0)
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#define MII_AM79C_IR_IMASK_STAT (MII_AM79C_IR_LINK_DOWN | MII_AM79C_IR_ANEG_DONE)
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MODULE_DESCRIPTION("AMD PHY driver");
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MODULE_AUTHOR("Heiko Schocher <hs@denx.de>");
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MODULE_LICENSE("GPL");
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static int am79c_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_BMSR);
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if (err < 0)
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return err;
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err = phy_read(phydev, MII_AM79C_IR);
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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 am79c_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 am79c_config_intr(struct phy_device *phydev)
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{
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int err;
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if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
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err = am79c_ack_interrupt(phydev);
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if (err)
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return err;
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err = phy_write(phydev, MII_AM79C_IR, MII_AM79C_IR_IMASK_INIT);
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} else {
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err = phy_write(phydev, MII_AM79C_IR, 0);
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if (err)
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return err;
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err = am79c_ack_interrupt(phydev);
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}
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return err;
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}
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static irqreturn_t am79c_handle_interrupt(struct phy_device *phydev)
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{
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int irq_status;
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irq_status = phy_read(phydev, MII_AM79C_IR);
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if (irq_status < 0) {
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phy_error(phydev);
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return IRQ_NONE;
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}
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if (!(irq_status & MII_AM79C_IR_IMASK_STAT))
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return IRQ_NONE;
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phy_trigger_machine(phydev);
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return IRQ_HANDLED;
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}
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static struct phy_driver am79c_driver[] = { {
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.phy_id = PHY_ID_AM79C874,
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.name = "AM79C874",
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.phy_id_mask = 0xfffffff0,
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/* PHY_BASIC_FEATURES */
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.config_init = am79c_config_init,
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.config_intr = am79c_config_intr,
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.handle_interrupt = am79c_handle_interrupt,
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} };
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module_phy_driver(am79c_driver);
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static struct mdio_device_id __maybe_unused amd_tbl[] = {
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{ PHY_ID_AM79C874, 0xfffffff0 },
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{ }
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};
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MODULE_DEVICE_TABLE(mdio, amd_tbl);
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