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f7e290fbeb
The IP101A_G_IRQ_CONF_STATUS register has bits to detect which interrupts have fired. Implement the .did_interrupt callback to let the PHY core know whether the interrupt was for this specific PHY. This is useful for debugging interrupt problems with 32-pin IP101GR PHYs where the interrupt line is shared with the RX_ERR (receive error status) signal. The default values are: - RX_ERR is enabled by default (LOW means that there is no receive error) - the PHY's interrupt line is configured "active low" by default Without any additional changes there is a flood of interrupts if the RX_ERR/INTR32 signal is configured in RX_ERR mode (which is the default). Having a did_interrupt ensures that the PHY core returns IRQ_NONE instead of endlessly triggering the PHY state machine. Additionally the kernel will report this after a while: irq 28: nobody cared (try booting with the "irqpoll" option) Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
278 lines
6.5 KiB
C
278 lines
6.5 KiB
C
/*
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* Driver for ICPlus PHYs
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*
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* Copyright (c) 2007 Freescale Semiconductor, 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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*/
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/unistd.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/spinlock.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/mii.h>
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#include <linux/ethtool.h>
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#include <linux/phy.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <linux/uaccess.h>
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MODULE_DESCRIPTION("ICPlus IP175C/IP101A/IP101G/IC1001 PHY drivers");
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MODULE_AUTHOR("Michael Barkowski");
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MODULE_LICENSE("GPL");
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/* IP101A/G - IP1001 */
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#define IP10XX_SPEC_CTRL_STATUS 16 /* Spec. Control Register */
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#define IP1001_RXPHASE_SEL BIT(0) /* Add delay on RX_CLK */
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#define IP1001_TXPHASE_SEL BIT(1) /* Add delay on TX_CLK */
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#define IP1001_SPEC_CTRL_STATUS_2 20 /* IP1001 Spec. Control Reg 2 */
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#define IP1001_APS_ON 11 /* IP1001 APS Mode bit */
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#define IP101A_G_APS_ON BIT(1) /* IP101A/G APS Mode bit */
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#define IP101A_G_IRQ_CONF_STATUS 0x11 /* Conf Info IRQ & Status Reg */
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#define IP101A_G_IRQ_PIN_USED BIT(15) /* INTR pin used */
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#define IP101A_G_IRQ_ALL_MASK BIT(11) /* IRQ's inactive */
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#define IP101A_G_IRQ_SPEED_CHANGE BIT(2)
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#define IP101A_G_IRQ_DUPLEX_CHANGE BIT(1)
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#define IP101A_G_IRQ_LINK_CHANGE BIT(0)
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static int ip175c_config_init(struct phy_device *phydev)
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{
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int err, i;
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static int full_reset_performed;
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if (full_reset_performed == 0) {
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/* master reset */
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err = mdiobus_write(phydev->mdio.bus, 30, 0, 0x175c);
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if (err < 0)
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return err;
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/* ensure no bus delays overlap reset period */
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err = mdiobus_read(phydev->mdio.bus, 30, 0);
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/* data sheet specifies reset period is 2 msec */
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mdelay(2);
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/* enable IP175C mode */
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err = mdiobus_write(phydev->mdio.bus, 29, 31, 0x175c);
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if (err < 0)
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return err;
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/* Set MII0 speed and duplex (in PHY mode) */
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err = mdiobus_write(phydev->mdio.bus, 29, 22, 0x420);
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if (err < 0)
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return err;
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/* reset switch ports */
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for (i = 0; i < 5; i++) {
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err = mdiobus_write(phydev->mdio.bus, i,
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MII_BMCR, BMCR_RESET);
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if (err < 0)
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return err;
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}
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for (i = 0; i < 5; i++)
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err = mdiobus_read(phydev->mdio.bus, i, MII_BMCR);
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mdelay(2);
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full_reset_performed = 1;
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}
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if (phydev->mdio.addr != 4) {
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phydev->state = PHY_RUNNING;
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phydev->speed = SPEED_100;
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phydev->duplex = DUPLEX_FULL;
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phydev->link = 1;
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netif_carrier_on(phydev->attached_dev);
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}
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return 0;
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}
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static int ip1xx_reset(struct phy_device *phydev)
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{
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int bmcr;
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/* Software Reset PHY */
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bmcr = phy_read(phydev, MII_BMCR);
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if (bmcr < 0)
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return bmcr;
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bmcr |= BMCR_RESET;
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bmcr = phy_write(phydev, MII_BMCR, bmcr);
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if (bmcr < 0)
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return bmcr;
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do {
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bmcr = phy_read(phydev, MII_BMCR);
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if (bmcr < 0)
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return bmcr;
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} while (bmcr & BMCR_RESET);
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return 0;
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}
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static int ip1001_config_init(struct phy_device *phydev)
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{
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int c;
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c = ip1xx_reset(phydev);
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if (c < 0)
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return c;
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/* Enable Auto Power Saving mode */
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c = phy_read(phydev, IP1001_SPEC_CTRL_STATUS_2);
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if (c < 0)
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return c;
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c |= IP1001_APS_ON;
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c = phy_write(phydev, IP1001_SPEC_CTRL_STATUS_2, c);
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if (c < 0)
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return c;
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if (phy_interface_is_rgmii(phydev)) {
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c = phy_read(phydev, IP10XX_SPEC_CTRL_STATUS);
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if (c < 0)
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return c;
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c &= ~(IP1001_RXPHASE_SEL | IP1001_TXPHASE_SEL);
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if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
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c |= (IP1001_RXPHASE_SEL | IP1001_TXPHASE_SEL);
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else if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
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c |= IP1001_RXPHASE_SEL;
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else if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
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c |= IP1001_TXPHASE_SEL;
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c = phy_write(phydev, IP10XX_SPEC_CTRL_STATUS, c);
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if (c < 0)
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return c;
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}
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return 0;
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}
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static int ip175c_read_status(struct phy_device *phydev)
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{
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if (phydev->mdio.addr == 4) /* WAN port */
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genphy_read_status(phydev);
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else
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/* Don't need to read status for switch ports */
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phydev->irq = PHY_IGNORE_INTERRUPT;
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return 0;
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}
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static int ip175c_config_aneg(struct phy_device *phydev)
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{
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if (phydev->mdio.addr == 4) /* WAN port */
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genphy_config_aneg(phydev);
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return 0;
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}
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static int ip101a_g_config_init(struct phy_device *phydev)
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{
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int c;
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c = ip1xx_reset(phydev);
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if (c < 0)
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return c;
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/* Enable Auto Power Saving mode */
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c = phy_read(phydev, IP10XX_SPEC_CTRL_STATUS);
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c |= IP101A_G_APS_ON;
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return phy_write(phydev, IP10XX_SPEC_CTRL_STATUS, c);
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}
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static int ip101a_g_config_intr(struct phy_device *phydev)
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{
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u16 val;
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if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
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/* INTR pin used: Speed/link/duplex will cause an interrupt */
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val = IP101A_G_IRQ_PIN_USED;
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else
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val = IP101A_G_IRQ_ALL_MASK;
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return phy_write(phydev, IP101A_G_IRQ_CONF_STATUS, val);
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}
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static int ip101a_g_did_interrupt(struct phy_device *phydev)
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{
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int val = phy_read(phydev, IP101A_G_IRQ_CONF_STATUS);
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if (val < 0)
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return 0;
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return val & (IP101A_G_IRQ_SPEED_CHANGE |
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IP101A_G_IRQ_DUPLEX_CHANGE |
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IP101A_G_IRQ_LINK_CHANGE);
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}
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static int ip101a_g_ack_interrupt(struct phy_device *phydev)
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{
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int err = phy_read(phydev, IP101A_G_IRQ_CONF_STATUS);
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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 struct phy_driver icplus_driver[] = {
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{
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.phy_id = 0x02430d80,
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.name = "ICPlus IP175C",
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.phy_id_mask = 0x0ffffff0,
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.features = PHY_BASIC_FEATURES,
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.config_init = &ip175c_config_init,
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.config_aneg = &ip175c_config_aneg,
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.read_status = &ip175c_read_status,
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.suspend = genphy_suspend,
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.resume = genphy_resume,
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}, {
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.phy_id = 0x02430d90,
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.name = "ICPlus IP1001",
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.phy_id_mask = 0x0ffffff0,
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.features = PHY_GBIT_FEATURES,
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.config_init = &ip1001_config_init,
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.suspend = genphy_suspend,
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.resume = genphy_resume,
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}, {
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.phy_id = 0x02430c54,
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.name = "ICPlus IP101A/G",
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.phy_id_mask = 0x0ffffff0,
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.features = PHY_BASIC_FEATURES,
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.config_intr = ip101a_g_config_intr,
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.did_interrupt = ip101a_g_did_interrupt,
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.ack_interrupt = ip101a_g_ack_interrupt,
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.config_init = &ip101a_g_config_init,
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.suspend = genphy_suspend,
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.resume = genphy_resume,
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} };
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module_phy_driver(icplus_driver);
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static struct mdio_device_id __maybe_unused icplus_tbl[] = {
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{ 0x02430d80, 0x0ffffff0 },
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{ 0x02430d90, 0x0ffffff0 },
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{ 0x02430c54, 0x0ffffff0 },
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{ }
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};
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MODULE_DEVICE_TABLE(mdio, icplus_tbl);
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