drivers/net/phy/bcm63xx.c

   1 /*
   2  *      Driver for Broadcom 63xx SOCs integrated PHYs
   3  *
   4  *      This program is free software; you can redistribute it and/or
   5  *      modify it under the terms of the GNU General Public License
   6  *      as published by the Free Software Foundation; either version
   7  *      2 of the License, or (at your option) any later version.
   8  */
   9 #include "bcm-phy-lib.h"
  10 #include <linux/module.h>
  11 #include <linux/phy.h>
  12
  13 #define MII_BCM63XX_IR          0x1a    /* interrupt register */
  14 #define MII_BCM63XX_IR_EN       0x4000  /* global interrupt enable */
  15 #define MII_BCM63XX_IR_DUPLEX   0x0800  /* duplex changed */
  16 #define MII_BCM63XX_IR_SPEED    0x0400  /* speed changed */
  17 #define MII_BCM63XX_IR_LINK     0x0200  /* link changed */
  18 #define MII_BCM63XX_IR_GMASK    0x0100  /* global interrupt mask */
  19
  20 MODULE_DESCRIPTION("Broadcom 63xx internal PHY driver");
  21 MODULE_AUTHOR("Maxime Bizon <mbizon@freebox.fr>");
  22 MODULE_LICENSE("GPL");
  23
  24 static int bcm63xx_config_intr(struct phy_device *phydev)
  25 {
  26         int reg, err;
  27
  28         reg = phy_read(phydev, MII_BCM63XX_IR);
  29         if (reg < 0)
  30                 return reg;
  31
  32         if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
  33                 reg &= ~MII_BCM63XX_IR_GMASK;
  34         else
  35                 reg |= MII_BCM63XX_IR_GMASK;
  36
  37         err = phy_write(phydev, MII_BCM63XX_IR, reg);
  38         return err;
  39 }
  40
  41 static int bcm63xx_config_init(struct phy_device *phydev)
  42 {
  43         int reg, err;
  44
  45         /* ASYM_PAUSE bit is marked RO in datasheet, so don't cheat */
  46         phydev->supported |= SUPPORTED_Pause;
  47
  48         reg = phy_read(phydev, MII_BCM63XX_IR);
  49         if (reg < 0)
  50                 return reg;
  51
  52         /* Mask interrupts globally.  */
  53         reg |= MII_BCM63XX_IR_GMASK;
  54         err = phy_write(phydev, MII_BCM63XX_IR, reg);
  55         if (err < 0)
  56                 return err;
  57
  58         /* Unmask events we are interested in  */
  59         reg = ~(MII_BCM63XX_IR_DUPLEX |
  60                 MII_BCM63XX_IR_SPEED |
  61                 MII_BCM63XX_IR_LINK) |
  62                 MII_BCM63XX_IR_EN;
  63         return phy_write(phydev, MII_BCM63XX_IR, reg);
  64 }
  65
  66 static struct phy_driver bcm63xx_driver[] = {
  67 {
  68         .phy_id         = 0x00406000,
  69         .phy_id_mask    = 0xfffffc00,
  70         .name           = "Broadcom BCM63XX (1)",
  71         .features       = PHY_BASIC_FEATURES,
  72         .flags          = PHY_HAS_INTERRUPT | PHY_IS_INTERNAL,
  73         .config_init    = bcm63xx_config_init,
  74         .ack_interrupt  = bcm_phy_ack_intr,
  75         .config_intr    = bcm63xx_config_intr,
  76 }, {
  77         /* same phy as above, with just a different OUI */
  78         .phy_id         = 0x002bdc00,
  79         .phy_id_mask    = 0xfffffc00,
  80         .features       = PHY_BASIC_FEATURES,
  81         .flags          = PHY_HAS_INTERRUPT | PHY_IS_INTERNAL,
  82         .config_init    = bcm63xx_config_init,
  83         .ack_interrupt  = bcm_phy_ack_intr,
  84         .config_intr    = bcm63xx_config_intr,
  85 } };
  86
  87 module_phy_driver(bcm63xx_driver);
  88
  89 static struct mdio_device_id __maybe_unused bcm63xx_tbl[] = {
  90         { 0x00406000, 0xfffffc00 },
  91         { 0x002bdc00, 0xfffffc00 },
  92         { }
  93 };
  94
  95 MODULE_DEVICE_TABLE(mdio, bcm63xx_tbl);