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 <linux/module.h>
  10 #include <linux/phy.h>
  11
  12 #define MII_BCM63XX_IR          0x1a    /* interrupt register */
  13 #define MII_BCM63XX_IR_EN       0x4000  /* global interrupt enable */
  14 #define MII_BCM63XX_IR_DUPLEX   0x0800  /* duplex changed */
  15 #define MII_BCM63XX_IR_SPEED    0x0400  /* speed changed */
  16 #define MII_BCM63XX_IR_LINK     0x0200  /* link changed */
  17 #define MII_BCM63XX_IR_GMASK    0x0100  /* global interrupt mask */
  18
  19 MODULE_DESCRIPTION("Broadcom 63xx internal PHY driver");
  20 MODULE_AUTHOR("Maxime Bizon <mbizon@freebox.fr>");
  21 MODULE_LICENSE("GPL");
  22
  23 static int bcm63xx_config_init(struct phy_device *phydev)
  24 {
  25         int reg, err;
  26
  27         reg = phy_read(phydev, MII_BCM63XX_IR);
  28         if (reg < 0)
  29                 return reg;
  30
  31         /* Mask interrupts globally.  */
  32         reg |= MII_BCM63XX_IR_GMASK;
  33         err = phy_write(phydev, MII_BCM63XX_IR, reg);
  34         if (err < 0)
  35                 return err;
  36
  37         /* Unmask events we are interested in  */
  38         reg = ~(MII_BCM63XX_IR_DUPLEX |
  39                 MII_BCM63XX_IR_SPEED |
  40                 MII_BCM63XX_IR_LINK) |
  41                 MII_BCM63XX_IR_EN;
  42         err = phy_write(phydev, MII_BCM63XX_IR, reg);
  43         if (err < 0)
  44                 return err;
  45         return 0;
  46 }
  47
  48 static int bcm63xx_ack_interrupt(struct phy_device *phydev)
  49 {
  50         int reg;
  51
  52         /* Clear pending interrupts.  */
  53         reg = phy_read(phydev, MII_BCM63XX_IR);
  54         if (reg < 0)
  55                 return reg;
  56
  57         return 0;
  58 }
  59
  60 static int bcm63xx_config_intr(struct phy_device *phydev)
  61 {
  62         int reg, err;
  63
  64         reg = phy_read(phydev, MII_BCM63XX_IR);
  65         if (reg < 0)
  66                 return reg;
  67
  68         if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
  69                 reg &= ~MII_BCM63XX_IR_GMASK;
  70         else
  71                 reg |= MII_BCM63XX_IR_GMASK;
  72
  73         err = phy_write(phydev, MII_BCM63XX_IR, reg);
  74         return err;
  75 }
  76
  77 static struct phy_driver bcm63xx_1_driver = {
  78         .phy_id         = 0x00406000,
  79         .phy_id_mask    = 0xfffffc00,
  80         .name           = "Broadcom BCM63XX (1)",
  81         /* ASYM_PAUSE bit is marked RO in datasheet, so don't cheat */
  82         .features       = (PHY_BASIC_FEATURES | SUPPORTED_Pause),
  83         .flags          = PHY_HAS_INTERRUPT,
  84         .config_init    = bcm63xx_config_init,
  85         .config_aneg    = genphy_config_aneg,
  86         .read_status    = genphy_read_status,
  87         .ack_interrupt  = bcm63xx_ack_interrupt,
  88         .config_intr    = bcm63xx_config_intr,
  89         .driver         = { .owner = THIS_MODULE },
  90 };
  91
  92 /* same phy as above, with just a different OUI */
  93 static struct phy_driver bcm63xx_2_driver = {
  94         .phy_id         = 0x002bdc00,
  95         .phy_id_mask    = 0xfffffc00,
  96         .name           = "Broadcom BCM63XX (2)",
  97         .features       = (PHY_BASIC_FEATURES | SUPPORTED_Pause),
  98         .flags          = PHY_HAS_INTERRUPT,
  99         .config_init    = bcm63xx_config_init,
 100         .config_aneg    = genphy_config_aneg,
 101         .read_status    = genphy_read_status,
 102         .ack_interrupt  = bcm63xx_ack_interrupt,
 103         .config_intr    = bcm63xx_config_intr,
 104         .driver         = { .owner = THIS_MODULE },
 105 };
 106
 107 static int __init bcm63xx_phy_init(void)
 108 {
 109         int ret;
 110
 111         ret = phy_driver_register(&bcm63xx_1_driver);
 112         if (ret)
 113                 goto out_63xx_1;
 114         ret = phy_driver_register(&bcm63xx_2_driver);
 115         if (ret)
 116                 goto out_63xx_2;
 117         return ret;
 118
 119 out_63xx_2:
 120         phy_driver_unregister(&bcm63xx_1_driver);
 121 out_63xx_1:
 122         return ret;
 123 }
 124
 125 static void __exit bcm63xx_phy_exit(void)
 126 {
 127         phy_driver_unregister(&bcm63xx_1_driver);
 128         phy_driver_unregister(&bcm63xx_2_driver);
 129 }
 130
 131 module_init(bcm63xx_phy_init);
 132 module_exit(bcm63xx_phy_exit);
 133
 134 static struct mdio_device_id __maybe_unused bcm63xx_tbl[] = {
 135         { 0x00406000, 0xfffffc00 },
 136         { 0x002bdc00, 0xfffffc00 },
 137         { }
 138 };
 139
 140 MODULE_DEVICE_TABLE(mdio, bcm63xx_tbl);