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         reg = phy_read(phydev, MII_BCM63XX_IR);
  46         if (reg < 0)
  47                 return reg;
  48
  49         /* Mask interrupts globally.  */
  50         reg |= MII_BCM63XX_IR_GMASK;
  51         err = phy_write(phydev, MII_BCM63XX_IR, reg);
  52         if (err < 0)
  53                 return err;
  54
  55         /* Unmask events we are interested in  */
  56         reg = ~(MII_BCM63XX_IR_DUPLEX |
  57                 MII_BCM63XX_IR_SPEED |
  58                 MII_BCM63XX_IR_LINK) |
  59                 MII_BCM63XX_IR_EN;
  60         return phy_write(phydev, MII_BCM63XX_IR, reg);
  61 }
  62
  63 static struct phy_driver bcm63xx_driver[] = {
  64 {
  65         .phy_id         = 0x00406000,
  66         .phy_id_mask    = 0xfffffc00,
  67         .name           = "Broadcom BCM63XX (1)",
  68         /* ASYM_PAUSE bit is marked RO in datasheet, so don't cheat */
  69         .features       = (PHY_BASIC_FEATURES | SUPPORTED_Pause),
  70         .flags          = PHY_HAS_INTERRUPT | PHY_IS_INTERNAL,
  71         .config_init    = bcm63xx_config_init,
  72         .config_aneg    = genphy_config_aneg,
  73         .read_status    = genphy_read_status,
  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         .name           = "Broadcom BCM63XX (2)",
  81         .features       = (PHY_BASIC_FEATURES | SUPPORTED_Pause),
  82         .flags          = PHY_HAS_INTERRUPT | PHY_IS_INTERNAL,
  83         .config_init    = bcm63xx_config_init,
  84         .config_aneg    = genphy_config_aneg,
  85         .read_status    = genphy_read_status,
  86         .ack_interrupt  = bcm_phy_ack_intr,
  87         .config_intr    = bcm63xx_config_intr,
  88 } };
  89
  90 module_phy_driver(bcm63xx_driver);
  91
  92 static struct mdio_device_id __maybe_unused bcm63xx_tbl[] = {
  93         { 0x00406000, 0xfffffc00 },
  94         { 0x002bdc00, 0xfffffc00 },
  95         { }
  96 };
  97
  98 MODULE_DEVICE_TABLE(mdio, bcm63xx_tbl);