drivers/net/phy/micrel.c

   1 /*
   2  * drivers/net/phy/micrel.c
   3  *
   4  * Driver for Micrel PHYs
   5  *
   6  * Author: David J. Choi
   7  *
   8  * Copyright (c) 2010 Micrel, Inc.
   9  *
  10  * This program is free software; you can redistribute  it and/or modify it
  11  * under  the terms of  the GNU General  Public License as published by the
  12  * Free Software Foundation;  either version 2 of the  License, or (at your
  13  * option) any later version.
  14  *
  15  * Support : ksz9021 1000/100/10 phy from Micrel
  16  *              ks8001, ks8737, ks8721, ks8041, ks8051 100/10 phy
  17  */
  18
  19 #include <linux/kernel.h>
  20 #include <linux/module.h>
  21 #include <linux/phy.h>
  22 #include <linux/micrel_phy.h>
  23
  24 /* general Interrupt control/status reg in vendor specific block. */
  25 #define MII_KSZPHY_INTCS                        0x1B
  26 #define KSZPHY_INTCS_JABBER                     (1 << 15)
  27 #define KSZPHY_INTCS_RECEIVE_ERR                (1 << 14)
  28 #define KSZPHY_INTCS_PAGE_RECEIVE               (1 << 13)
  29 #define KSZPHY_INTCS_PARELLEL                   (1 << 12)
  30 #define KSZPHY_INTCS_LINK_PARTNER_ACK           (1 << 11)
  31 #define KSZPHY_INTCS_LINK_DOWN                  (1 << 10)
  32 #define KSZPHY_INTCS_REMOTE_FAULT               (1 << 9)
  33 #define KSZPHY_INTCS_LINK_UP                    (1 << 8)
  34 #define KSZPHY_INTCS_ALL                        (KSZPHY_INTCS_LINK_UP |\
  35                                                 KSZPHY_INTCS_LINK_DOWN)
  36
  37 /* general PHY control reg in vendor specific block. */
  38 #define MII_KSZPHY_CTRL                 0x1F
  39 /* bitmap of PHY register to set interrupt mode */
  40 #define KSZPHY_CTRL_INT_ACTIVE_HIGH             (1 << 9)
  41 #define KSZ9021_CTRL_INT_ACTIVE_HIGH            (1 << 14)
  42 #define KS8737_CTRL_INT_ACTIVE_HIGH             (1 << 14)
  43 #define KSZ8051_RMII_50MHZ_CLK                  (1 << 7)
  44
  45 static int kszphy_ack_interrupt(struct phy_device *phydev)
  46 {
  47         /* bit[7..0] int status, which is a read and clear register. */
  48         int rc;
  49
  50         rc = phy_read(phydev, MII_KSZPHY_INTCS);
  51
  52         return (rc < 0) ? rc : 0;
  53 }
  54
  55 static int kszphy_set_interrupt(struct phy_device *phydev)
  56 {
  57         int temp;
  58         temp = (PHY_INTERRUPT_ENABLED == phydev->interrupts) ?
  59                 KSZPHY_INTCS_ALL : 0;
  60         return phy_write(phydev, MII_KSZPHY_INTCS, temp);
  61 }
  62
  63 static int kszphy_config_intr(struct phy_device *phydev)
  64 {
  65         int temp, rc;
  66
  67         /* set the interrupt pin active low */
  68         temp = phy_read(phydev, MII_KSZPHY_CTRL);
  69         temp &= ~KSZPHY_CTRL_INT_ACTIVE_HIGH;
  70         phy_write(phydev, MII_KSZPHY_CTRL, temp);
  71         rc = kszphy_set_interrupt(phydev);
  72         return rc < 0 ? rc : 0;
  73 }
  74
  75 static int ksz9021_config_intr(struct phy_device *phydev)
  76 {
  77         int temp, rc;
  78
  79         /* set the interrupt pin active low */
  80         temp = phy_read(phydev, MII_KSZPHY_CTRL);
  81         temp &= ~KSZ9021_CTRL_INT_ACTIVE_HIGH;
  82         phy_write(phydev, MII_KSZPHY_CTRL, temp);
  83         rc = kszphy_set_interrupt(phydev);
  84         return rc < 0 ? rc : 0;
  85 }
  86
  87 static int ks8737_config_intr(struct phy_device *phydev)
  88 {
  89         int temp, rc;
  90
  91         /* set the interrupt pin active low */
  92         temp = phy_read(phydev, MII_KSZPHY_CTRL);
  93         temp &= ~KS8737_CTRL_INT_ACTIVE_HIGH;
  94         phy_write(phydev, MII_KSZPHY_CTRL, temp);
  95         rc = kszphy_set_interrupt(phydev);
  96         return rc < 0 ? rc : 0;
  97 }
  98
  99 static int kszphy_config_init(struct phy_device *phydev)
 100 {
 101         return 0;
 102 }
 103
 104 static int ks8051_config_init(struct phy_device *phydev)
 105 {
 106         int regval;
 107
 108         if (phydev->dev_flags & MICREL_PHY_50MHZ_CLK) {
 109                 regval = phy_read(phydev, MII_KSZPHY_CTRL);
 110                 regval |= KSZ8051_RMII_50MHZ_CLK;
 111                 phy_write(phydev, MII_KSZPHY_CTRL, regval);
 112         }
 113
 114         return 0;
 115 }
 116
 117 static struct phy_driver ks8737_driver = {
 118         .phy_id         = PHY_ID_KS8737,
 119         .phy_id_mask    = 0x00fffff0,
 120         .name           = "Micrel KS8737",
 121         .features       = (PHY_BASIC_FEATURES | SUPPORTED_Pause),
 122         .flags          = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 123         .config_init    = kszphy_config_init,
 124         .config_aneg    = genphy_config_aneg,
 125         .read_status    = genphy_read_status,
 126         .ack_interrupt  = kszphy_ack_interrupt,
 127         .config_intr    = ks8737_config_intr,
 128         .driver         = { .owner = THIS_MODULE,},
 129 };
 130
 131 static struct phy_driver ks8041_driver = {
 132         .phy_id         = PHY_ID_KS8041,
 133         .phy_id_mask    = 0x00fffff0,
 134         .name           = "Micrel KS8041",
 135         .features       = (PHY_BASIC_FEATURES | SUPPORTED_Pause
 136                                 | SUPPORTED_Asym_Pause),
 137         .flags          = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 138         .config_init    = kszphy_config_init,
 139         .config_aneg    = genphy_config_aneg,
 140         .read_status    = genphy_read_status,
 141         .ack_interrupt  = kszphy_ack_interrupt,
 142         .config_intr    = kszphy_config_intr,
 143         .driver         = { .owner = THIS_MODULE,},
 144 };
 145
 146 static struct phy_driver ks8051_driver = {
 147         .phy_id         = PHY_ID_KS8051,
 148         .phy_id_mask    = 0x00fffff0,
 149         .name           = "Micrel KS8051",
 150         .features       = (PHY_BASIC_FEATURES | SUPPORTED_Pause
 151                                 | SUPPORTED_Asym_Pause),
 152         .flags          = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 153         .config_init    = ks8051_config_init,
 154         .config_aneg    = genphy_config_aneg,
 155         .read_status    = genphy_read_status,
 156         .ack_interrupt  = kszphy_ack_interrupt,
 157         .config_intr    = kszphy_config_intr,
 158         .driver         = { .owner = THIS_MODULE,},
 159 };
 160
 161 static struct phy_driver ks8001_driver = {
 162         .phy_id         = PHY_ID_KS8001,
 163         .name           = "Micrel KS8001 or KS8721",
 164         .phy_id_mask    = 0x00fffff0,
 165         .features       = (PHY_BASIC_FEATURES | SUPPORTED_Pause),
 166         .flags          = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 167         .config_init    = kszphy_config_init,
 168         .config_aneg    = genphy_config_aneg,
 169         .read_status    = genphy_read_status,
 170         .ack_interrupt  = kszphy_ack_interrupt,
 171         .config_intr    = kszphy_config_intr,
 172         .driver         = { .owner = THIS_MODULE,},
 173 };
 174
 175 static struct phy_driver ksz9021_driver = {
 176         .phy_id         = PHY_ID_KSZ9021,
 177         .phy_id_mask    = 0x000fff10,
 178         .name           = "Micrel KSZ9021 Gigabit PHY",
 179         .features       = (PHY_GBIT_FEATURES | SUPPORTED_Pause
 180                                 | SUPPORTED_Asym_Pause),
 181         .flags          = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 182         .config_init    = kszphy_config_init,
 183         .config_aneg    = genphy_config_aneg,
 184         .read_status    = genphy_read_status,
 185         .ack_interrupt  = kszphy_ack_interrupt,
 186         .config_intr    = ksz9021_config_intr,
 187         .driver         = { .owner = THIS_MODULE, },
 188 };
 189
 190 static int __init ksphy_init(void)
 191 {
 192         int ret;
 193
 194         ret = phy_driver_register(&ks8001_driver);
 195         if (ret)
 196                 goto err1;
 197
 198         ret = phy_driver_register(&ksz9021_driver);
 199         if (ret)
 200                 goto err2;
 201
 202         ret = phy_driver_register(&ks8737_driver);
 203         if (ret)
 204                 goto err3;
 205         ret = phy_driver_register(&ks8041_driver);
 206         if (ret)
 207                 goto err4;
 208         ret = phy_driver_register(&ks8051_driver);
 209         if (ret)
 210                 goto err5;
 211
 212         return 0;
 213
 214 err5:
 215         phy_driver_unregister(&ks8041_driver);
 216 err4:
 217         phy_driver_unregister(&ks8737_driver);
 218 err3:
 219         phy_driver_unregister(&ksz9021_driver);
 220 err2:
 221         phy_driver_unregister(&ks8001_driver);
 222 err1:
 223         return ret;
 224 }
 225
 226 static void __exit ksphy_exit(void)
 227 {
 228         phy_driver_unregister(&ks8001_driver);
 229         phy_driver_unregister(&ks8737_driver);
 230         phy_driver_unregister(&ksz9021_driver);
 231         phy_driver_unregister(&ks8041_driver);
 232         phy_driver_unregister(&ks8051_driver);
 233 }
 234
 235 module_init(ksphy_init);
 236 module_exit(ksphy_exit);
 237
 238 MODULE_DESCRIPTION("Micrel PHY driver");
 239 MODULE_AUTHOR("David J. Choi");
 240 MODULE_LICENSE("GPL");
 241
 242 static struct mdio_device_id __maybe_unused micrel_tbl[] = {
 243         { PHY_ID_KSZ9021, 0x000fff10 },
 244         { PHY_ID_KS8001, 0x00fffff0 },
 245         { PHY_ID_KS8737, 0x00fffff0 },
 246         { PHY_ID_KS8041, 0x00fffff0 },
 247         { PHY_ID_KS8051, 0x00fffff0 },
 248         { }
 249 };
 250
 251 MODULE_DEVICE_TABLE(mdio, micrel_tbl);