drivers/net/phy/broadcom.c

   1 /*
   2  *      drivers/net/phy/broadcom.c
   3  *
   4  *      Broadcom BCM5411, BCM5421 and BCM5461 Gigabit Ethernet
   5  *      transceivers.
   6  *
   7  *      Copyright (c) 2006  Maciej W. Rozycki
   8  *
   9  *      Inspired by code written by Amy Fong.
  10  *
  11  *      This program is free software; you can redistribute it and/or
  12  *      modify it under the terms of the GNU General Public License
  13  *      as published by the Free Software Foundation; either version
  14  *      2 of the License, or (at your option) any later version.
  15  */
  16
  17 #include <linux/module.h>
  18 #include <linux/phy.h>
  19
  20 #define MII_BCM54XX_ECR         0x10    /* BCM54xx extended control register */
  21 #define MII_BCM54XX_ECR_IM      0x1000  /* Interrupt mask */
  22 #define MII_BCM54XX_ECR_IF      0x0800  /* Interrupt force */
  23
  24 #define MII_BCM54XX_ESR         0x11    /* BCM54xx extended status register */
  25 #define MII_BCM54XX_ESR_IS      0x1000  /* Interrupt status */
  26
  27 #define MII_BCM54XX_ISR         0x1a    /* BCM54xx interrupt status register */
  28 #define MII_BCM54XX_IMR         0x1b    /* BCM54xx interrupt mask register */
  29 #define MII_BCM54XX_INT_CRCERR  0x0001  /* CRC error */
  30 #define MII_BCM54XX_INT_LINK    0x0002  /* Link status changed */
  31 #define MII_BCM54XX_INT_SPEED   0x0004  /* Link speed change */
  32 #define MII_BCM54XX_INT_DUPLEX  0x0008  /* Duplex mode changed */
  33 #define MII_BCM54XX_INT_LRS     0x0010  /* Local receiver status changed */
  34 #define MII_BCM54XX_INT_RRS     0x0020  /* Remote receiver status changed */
  35 #define MII_BCM54XX_INT_SSERR   0x0040  /* Scrambler synchronization error */
  36 #define MII_BCM54XX_INT_UHCD    0x0080  /* Unsupported HCD negotiated */
  37 #define MII_BCM54XX_INT_NHCD    0x0100  /* No HCD */
  38 #define MII_BCM54XX_INT_NHCDL   0x0200  /* No HCD link */
  39 #define MII_BCM54XX_INT_ANPR    0x0400  /* Auto-negotiation page received */
  40 #define MII_BCM54XX_INT_LC      0x0800  /* All counters below 128 */
  41 #define MII_BCM54XX_INT_HC      0x1000  /* Counter above 32768 */
  42 #define MII_BCM54XX_INT_MDIX    0x2000  /* MDIX status change */
  43 #define MII_BCM54XX_INT_PSERR   0x4000  /* Pair swap error */
  44
  45 MODULE_DESCRIPTION("Broadcom PHY driver");
  46 MODULE_AUTHOR("Maciej W. Rozycki");
  47 MODULE_LICENSE("GPL");
  48
  49 static int bcm54xx_config_init(struct phy_device *phydev)
  50 {
  51         int reg, err;
  52
  53         reg = phy_read(phydev, MII_BCM54XX_ECR);
  54         if (reg < 0)
  55                 return reg;
  56
  57         /* Mask interrupts globally.  */
  58         reg |= MII_BCM54XX_ECR_IM;
  59         err = phy_write(phydev, MII_BCM54XX_ECR, reg);
  60         if (err < 0)
  61                 return err;
  62
  63         /* Unmask events we are interested in.  */
  64         reg = ~(MII_BCM54XX_INT_DUPLEX |
  65                 MII_BCM54XX_INT_SPEED |
  66                 MII_BCM54XX_INT_LINK);
  67         err = phy_write(phydev, MII_BCM54XX_IMR, reg);
  68         if (err < 0)
  69                 return err;
  70         return 0;
  71 }
  72
  73 static int bcm54xx_ack_interrupt(struct phy_device *phydev)
  74 {
  75         int reg;
  76
  77         /* Clear pending interrupts.  */
  78         reg = phy_read(phydev, MII_BCM54XX_ISR);
  79         if (reg < 0)
  80                 return reg;
  81
  82         return 0;
  83 }
  84
  85 static int bcm54xx_config_intr(struct phy_device *phydev)
  86 {
  87         int reg, err;
  88
  89         reg = phy_read(phydev, MII_BCM54XX_ECR);
  90         if (reg < 0)
  91                 return reg;
  92
  93         if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
  94                 reg &= ~MII_BCM54XX_ECR_IM;
  95         else
  96                 reg |= MII_BCM54XX_ECR_IM;
  97
  98         err = phy_write(phydev, MII_BCM54XX_ECR, reg);
  99         return err;
 100 }
 101
 102 static struct phy_driver bcm5411_driver = {
 103         .phy_id         = 0x00206070,
 104         .phy_id_mask    = 0xfffffff0,
 105         .name           = "Broadcom BCM5411",
 106         .features       = PHY_GBIT_FEATURES,
 107         .flags          = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 108         .config_init    = bcm54xx_config_init,
 109         .config_aneg    = genphy_config_aneg,
 110         .read_status    = genphy_read_status,
 111         .ack_interrupt  = bcm54xx_ack_interrupt,
 112         .config_intr    = bcm54xx_config_intr,
 113         .driver         = { .owner = THIS_MODULE },
 114 };
 115
 116 static struct phy_driver bcm5421_driver = {
 117         .phy_id         = 0x002060e0,
 118         .phy_id_mask    = 0xfffffff0,
 119         .name           = "Broadcom BCM5421",
 120         .features       = PHY_GBIT_FEATURES,
 121         .flags          = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 122         .config_init    = bcm54xx_config_init,
 123         .config_aneg    = genphy_config_aneg,
 124         .read_status    = genphy_read_status,
 125         .ack_interrupt  = bcm54xx_ack_interrupt,
 126         .config_intr    = bcm54xx_config_intr,
 127         .driver         = { .owner = THIS_MODULE },
 128 };
 129
 130 static struct phy_driver bcm5461_driver = {
 131         .phy_id         = 0x002060c0,
 132         .phy_id_mask    = 0xfffffff0,
 133         .name           = "Broadcom BCM5461",
 134         .features       = PHY_GBIT_FEATURES,
 135         .flags          = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 136         .config_init    = bcm54xx_config_init,
 137         .config_aneg    = genphy_config_aneg,
 138         .read_status    = genphy_read_status,
 139         .ack_interrupt  = bcm54xx_ack_interrupt,
 140         .config_intr    = bcm54xx_config_intr,
 141         .driver         = { .owner = THIS_MODULE },
 142 };
 143
 144 static int __init broadcom_init(void)
 145 {
 146         int ret;
 147
 148         ret = phy_driver_register(&bcm5411_driver);
 149         if (ret)
 150                 goto out_5411;
 151         ret = phy_driver_register(&bcm5421_driver);
 152         if (ret)
 153                 goto out_5421;
 154         ret = phy_driver_register(&bcm5461_driver);
 155         if (ret)
 156                 goto out_5461;
 157         return ret;
 158
 159 out_5461:
 160         phy_driver_unregister(&bcm5421_driver);
 161 out_5421:
 162         phy_driver_unregister(&bcm5411_driver);
 163 out_5411:
 164         return ret;
 165 }
 166
 167 static void __exit broadcom_exit(void)
 168 {
 169         phy_driver_unregister(&bcm5461_driver);
 170         phy_driver_unregister(&bcm5421_driver);
 171         phy_driver_unregister(&bcm5411_driver);
 172 }
 173
 174 module_init(broadcom_init);
 175 module_exit(broadcom_exit);