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         return phy_write(phydev, MII_BCM63XX_IR, reg);
  43 }
  44
  45 static int bcm63xx_ack_interrupt(struct phy_device *phydev)
  46 {
  47         int reg;
  48
  49         /* Clear pending interrupts.  */
  50         reg = phy_read(phydev, MII_BCM63XX_IR);
  51         if (reg < 0)
  52                 return reg;
  53
  54         return 0;
  55 }
  56
  57 static int bcm63xx_config_intr(struct phy_device *phydev)
  58 {
  59         int reg, err;
  60
  61         reg = phy_read(phydev, MII_BCM63XX_IR);
  62         if (reg < 0)
  63                 return reg;
  64
  65         if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
  66                 reg &= ~MII_BCM63XX_IR_GMASK;
  67         else
  68                 reg |= MII_BCM63XX_IR_GMASK;
  69
  70         err = phy_write(phydev, MII_BCM63XX_IR, reg);
  71         return err;
  72 }
  73
  74 static struct phy_driver bcm63xx_driver[] = {
  75 {
  76         .phy_id         = 0x00406000,
  77         .phy_id_mask    = 0xfffffc00,
  78         .name           = "Broadcom BCM63XX (1)",
  79         /* ASYM_PAUSE bit is marked RO in datasheet, so don't cheat */
  80         .features       = (PHY_BASIC_FEATURES | SUPPORTED_Pause),
  81         .flags          = PHY_HAS_INTERRUPT,
  82         .config_init    = bcm63xx_config_init,
  83         .config_aneg    = genphy_config_aneg,
  84         .read_status    = genphy_read_status,
  85         .ack_interrupt  = bcm63xx_ack_interrupt,
  86         .config_intr    = bcm63xx_config_intr,
  87         .driver         = { .owner = THIS_MODULE },
  88 }, {
  89         /* same phy as above, with just a different OUI */
  90         .phy_id         = 0x002bdc00,
  91         .phy_id_mask    = 0xfffffc00,
  92         .name           = "Broadcom BCM63XX (2)",
  93         .features       = (PHY_BASIC_FEATURES | SUPPORTED_Pause),
  94         .flags          = PHY_HAS_INTERRUPT,
  95         .config_init    = bcm63xx_config_init,
  96         .config_aneg    = genphy_config_aneg,
  97         .read_status    = genphy_read_status,
  98         .ack_interrupt  = bcm63xx_ack_interrupt,
  99         .config_intr    = bcm63xx_config_intr,
 100         .driver         = { .owner = THIS_MODULE },
 101 } };
 102
 103 static int __init bcm63xx_phy_init(void)
 104 {
 105         return phy_drivers_register(bcm63xx_driver,
 106                 ARRAY_SIZE(bcm63xx_driver));
 107 }
 108
 109 static void __exit bcm63xx_phy_exit(void)
 110 {
 111         phy_drivers_unregister(bcm63xx_driver,
 112                 ARRAY_SIZE(bcm63xx_driver));
 113 }
 114
 115 module_init(bcm63xx_phy_init);
 116 module_exit(bcm63xx_phy_exit);
 117
 118 static struct mdio_device_id __maybe_unused bcm63xx_tbl[] = {
 119         { 0x00406000, 0xfffffc00 },
 120         { 0x002bdc00, 0xfffffc00 },
 121         { }
 122 };
 123
 124 MODULE_DEVICE_TABLE(mdio, bcm63xx_tbl);