drivers/net/phy/bcm63xx.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  *      Driver for Broadcom 63xx SOCs integrated PHYs
   4  */
   5 #include "bcm-phy-lib.h"
   6 #include <linux/module.h>
   7 #include <linux/phy.h>
   8
   9 #define MII_BCM63XX_IR          0x1a    /* interrupt register */
  10 #define MII_BCM63XX_IR_EN       0x4000  /* global interrupt enable */
  11 #define MII_BCM63XX_IR_DUPLEX   0x0800  /* duplex changed */
  12 #define MII_BCM63XX_IR_SPEED    0x0400  /* speed changed */
  13 #define MII_BCM63XX_IR_LINK     0x0200  /* link changed */
  14 #define MII_BCM63XX_IR_GMASK    0x0100  /* global interrupt mask */
  15
  16 MODULE_DESCRIPTION("Broadcom 63xx internal PHY driver");
  17 MODULE_AUTHOR("Maxime Bizon <mbizon@freebox.fr>");
  18 MODULE_LICENSE("GPL");
  19
  20 static int bcm63xx_config_intr(struct phy_device *phydev)
  21 {
  22         int reg, err;
  23
  24         reg = phy_read(phydev, MII_BCM63XX_IR);
  25         if (reg < 0)
  26                 return reg;
  27
  28         if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
  29                 err = bcm_phy_ack_intr(phydev);
  30                 if (err)
  31                         return err;
  32
  33                 reg &= ~MII_BCM63XX_IR_GMASK;
  34                 err = phy_write(phydev, MII_BCM63XX_IR, reg);
  35         } else {
  36                 reg |= MII_BCM63XX_IR_GMASK;
  37                 err = phy_write(phydev, MII_BCM63XX_IR, reg);
  38                 if (err)
  39                         return err;
  40
  41                 err = bcm_phy_ack_intr(phydev);
  42         }
  43
  44         return err;
  45 }
  46
  47 static int bcm63xx_config_init(struct phy_device *phydev)
  48 {
  49         int reg, err;
  50
  51         /* ASYM_PAUSE bit is marked RO in datasheet, so don't cheat */
  52         linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported);
  53
  54         reg = phy_read(phydev, MII_BCM63XX_IR);
  55         if (reg < 0)
  56                 return reg;
  57
  58         /* Mask interrupts globally.  */
  59         reg |= MII_BCM63XX_IR_GMASK;
  60         err = phy_write(phydev, MII_BCM63XX_IR, reg);
  61         if (err < 0)
  62                 return err;
  63
  64         /* Unmask events we are interested in  */
  65         reg = ~(MII_BCM63XX_IR_DUPLEX |
  66                 MII_BCM63XX_IR_SPEED |
  67                 MII_BCM63XX_IR_LINK) |
  68                 MII_BCM63XX_IR_EN;
  69         return phy_write(phydev, MII_BCM63XX_IR, reg);
  70 }
  71
  72 static struct phy_driver bcm63xx_driver[] = {
  73 {
  74         .phy_id         = 0x00406000,
  75         .phy_id_mask    = 0xfffffc00,
  76         .name           = "Broadcom BCM63XX (1)",
  77         /* PHY_BASIC_FEATURES */
  78         .flags          = PHY_IS_INTERNAL,
  79         .config_init    = bcm63xx_config_init,
  80         .config_intr    = bcm63xx_config_intr,
  81         .handle_interrupt = bcm_phy_handle_interrupt,
  82 }, {
  83         /* same phy as above, with just a different OUI */
  84         .phy_id         = 0x002bdc00,
  85         .phy_id_mask    = 0xfffffc00,
  86         .name           = "Broadcom BCM63XX (2)",
  87         /* PHY_BASIC_FEATURES */
  88         .flags          = PHY_IS_INTERNAL,
  89         .config_init    = bcm63xx_config_init,
  90         .config_intr    = bcm63xx_config_intr,
  91         .handle_interrupt = bcm_phy_handle_interrupt,
  92 } };
  93
  94 module_phy_driver(bcm63xx_driver);
  95
  96 static struct mdio_device_id __maybe_unused bcm63xx_tbl[] = {
  97         { 0x00406000, 0xfffffc00 },
  98         { 0x002bdc00, 0xfffffc00 },
  99         { }
 100 };
 101
 102 MODULE_DEVICE_TABLE(mdio, bcm63xx_tbl);