a25cc43ebb
Compile tested. remove unnecessary code that matches this coccinelle pattern ret = phy_write(x, y , z) if (ret < 0) return ret; return 0; As phy_write returns error code, we dont need to do not need extra check before returning. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com> Signed-off-by: David S. Miller <davem@davemloft.net>
138 lines
3.4 KiB
C
138 lines
3.4 KiB
C
/*
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* Driver for Broadcom 63xx SOCs integrated PHYs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/module.h>
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#include <linux/phy.h>
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#define MII_BCM63XX_IR 0x1a /* interrupt register */
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#define MII_BCM63XX_IR_EN 0x4000 /* global interrupt enable */
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#define MII_BCM63XX_IR_DUPLEX 0x0800 /* duplex changed */
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#define MII_BCM63XX_IR_SPEED 0x0400 /* speed changed */
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#define MII_BCM63XX_IR_LINK 0x0200 /* link changed */
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#define MII_BCM63XX_IR_GMASK 0x0100 /* global interrupt mask */
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MODULE_DESCRIPTION("Broadcom 63xx internal PHY driver");
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MODULE_AUTHOR("Maxime Bizon <mbizon@freebox.fr>");
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MODULE_LICENSE("GPL");
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static int bcm63xx_config_init(struct phy_device *phydev)
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{
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int reg, err;
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reg = phy_read(phydev, MII_BCM63XX_IR);
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if (reg < 0)
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return reg;
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/* Mask interrupts globally. */
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reg |= MII_BCM63XX_IR_GMASK;
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err = phy_write(phydev, MII_BCM63XX_IR, reg);
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if (err < 0)
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return err;
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/* Unmask events we are interested in */
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reg = ~(MII_BCM63XX_IR_DUPLEX |
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MII_BCM63XX_IR_SPEED |
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MII_BCM63XX_IR_LINK) |
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MII_BCM63XX_IR_EN;
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return phy_write(phydev, MII_BCM63XX_IR, reg);
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}
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static int bcm63xx_ack_interrupt(struct phy_device *phydev)
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{
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int reg;
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/* Clear pending interrupts. */
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reg = phy_read(phydev, MII_BCM63XX_IR);
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if (reg < 0)
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return reg;
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return 0;
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}
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static int bcm63xx_config_intr(struct phy_device *phydev)
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{
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int reg, err;
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reg = phy_read(phydev, MII_BCM63XX_IR);
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if (reg < 0)
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return reg;
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if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
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reg &= ~MII_BCM63XX_IR_GMASK;
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else
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reg |= MII_BCM63XX_IR_GMASK;
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err = phy_write(phydev, MII_BCM63XX_IR, reg);
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return err;
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}
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static struct phy_driver bcm63xx_1_driver = {
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.phy_id = 0x00406000,
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.phy_id_mask = 0xfffffc00,
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.name = "Broadcom BCM63XX (1)",
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/* ASYM_PAUSE bit is marked RO in datasheet, so don't cheat */
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.features = (PHY_BASIC_FEATURES | SUPPORTED_Pause),
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.flags = PHY_HAS_INTERRUPT,
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.config_init = bcm63xx_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 = bcm63xx_ack_interrupt,
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.config_intr = bcm63xx_config_intr,
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.driver = { .owner = THIS_MODULE },
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};
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/* same phy as above, with just a different OUI */
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static struct phy_driver bcm63xx_2_driver = {
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.phy_id = 0x002bdc00,
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.phy_id_mask = 0xfffffc00,
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.name = "Broadcom BCM63XX (2)",
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.features = (PHY_BASIC_FEATURES | SUPPORTED_Pause),
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.flags = PHY_HAS_INTERRUPT,
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.config_init = bcm63xx_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 = bcm63xx_ack_interrupt,
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.config_intr = bcm63xx_config_intr,
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.driver = { .owner = THIS_MODULE },
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};
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static int __init bcm63xx_phy_init(void)
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{
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int ret;
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ret = phy_driver_register(&bcm63xx_1_driver);
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if (ret)
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goto out_63xx_1;
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ret = phy_driver_register(&bcm63xx_2_driver);
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if (ret)
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goto out_63xx_2;
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return ret;
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out_63xx_2:
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phy_driver_unregister(&bcm63xx_1_driver);
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out_63xx_1:
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return ret;
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}
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static void __exit bcm63xx_phy_exit(void)
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{
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phy_driver_unregister(&bcm63xx_1_driver);
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phy_driver_unregister(&bcm63xx_2_driver);
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}
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module_init(bcm63xx_phy_init);
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module_exit(bcm63xx_phy_exit);
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static struct mdio_device_id __maybe_unused bcm63xx_tbl[] = {
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{ 0x00406000, 0xfffffc00 },
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{ 0x002bdc00, 0xfffffc00 },
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{ }
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};
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MODULE_DEVICE_TABLE(mdio, bcm63xx_tbl);
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