mii_fdt.c

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    1 /*-
    2  * Copyright (c) 2017 Ian Lepore <ian@freebsd.org>
    3  * All rights reserved.
    4  *
    5  * Development sponsored by Microsemi, Inc.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD$");
   31 
   32 /*
   33  * Utility functions for PHY drivers on systems configured using FDT data.
   34  */
   35 
   36 #include <sys/param.h>
   37 #include <sys/systm.h>
   38 #include <sys/socket.h>
   39 #include <sys/bus.h>
   40 #include <sys/malloc.h>
   41 
   42 #include <net/if.h>
   43 #include <net/if_media.h>
   44 
   45 #include <dev/ofw/openfirm.h>
   46 #include <dev/ofw/ofw_bus.h>
   47 #include <dev/ofw/ofw_bus_subr.h>
   48 
   49 #include <dev/mii/mii.h>
   50 #include <dev/mii/miivar.h>
   51 #include <dev/mii/mii_fdt.h>
   52 
   53 /*
   54  * Table to translate MII_CONTYPE_xxxx constants to/from devicetree strings.
   55  * We explicitly associate the enum values with the strings in a table to avoid
   56  * relying on this list being sorted in the same order as the enum in miivar.h,
   57  * and to avoid problems if the enum gains new types that aren't in the FDT
   58  * data.  However, the "unknown" entry must be first because it is referenced
   59  * using subscript 0 in mii_fdt_contype_to_name().
   60  */
   61 static struct contype_names {
   62         mii_contype_t type;
   63         const char   *name;
   64 } fdt_contype_names[] = {
   65         {MII_CONTYPE_UNKNOWN,           "unknown"},
   66         {MII_CONTYPE_MII,               "mii"},
   67         {MII_CONTYPE_GMII,              "gmii"},
   68         {MII_CONTYPE_SGMII,             "sgmii"},
   69         {MII_CONTYPE_QSGMII,            "qsgmii"},
   70         {MII_CONTYPE_TBI,               "tbi"},
   71         {MII_CONTYPE_REVMII,            "rev-mii"},
   72         {MII_CONTYPE_RMII,              "rmii"},
   73         {MII_CONTYPE_RGMII,             "rgmii"},
   74         {MII_CONTYPE_RGMII_ID,          "rgmii-id"},
   75         {MII_CONTYPE_RGMII_RXID,        "rgmii-rxid"},
   76         {MII_CONTYPE_RGMII_TXID,        "rgmii-txid"},
   77         {MII_CONTYPE_RTBI,              "rtbi"},
   78         {MII_CONTYPE_SMII,              "smii"},
   79         {MII_CONTYPE_XGMII,             "xgmii"},
   80         {MII_CONTYPE_TRGMII,            "trgmii"},
   81         {MII_CONTYPE_2000BX,            "2000base-x"},
   82         {MII_CONTYPE_2500BX,            "2500base-x"},
   83         {MII_CONTYPE_RXAUI,             "rxaui"},
   84 };                                                           
   85 
   86 static phandle_t
   87 mii_fdt_get_phynode(phandle_t macnode)
   88 {
   89         static const char *props[] = {
   90             "phy-handle", "phy", "phy-device"
   91         };
   92         pcell_t xref;
   93         u_int i;
   94 
   95         for (i = 0; i < nitems(props); ++i) {
   96                 if (OF_getencprop(macnode, props[i], &xref, sizeof(xref)) > 0)
   97                         return (OF_node_from_xref(xref));
   98         }
   99         return (-1);
  100 }
  101 
  102 mii_contype_t
  103 mii_fdt_contype_from_name(const char *name)
  104 {
  105         u_int i;
  106 
  107         for (i = 0; i < nitems(fdt_contype_names); ++i) {
  108                 if (strcmp(name, fdt_contype_names[i].name) == 0)
  109                         return (fdt_contype_names[i].type);
  110         }
  111         return (MII_CONTYPE_UNKNOWN);
  112 }
  113 
  114 const char *
  115 mii_fdt_contype_to_name(mii_contype_t contype)
  116 {
  117         u_int i;
  118 
  119         for (i = 0; i < nitems(fdt_contype_names); ++i) {
  120                 if (contype == fdt_contype_names[i].type)
  121                         return (fdt_contype_names[i].name);
  122         }
  123         return (fdt_contype_names[0].name);
  124 }
  125 
  126 mii_contype_t
  127 mii_fdt_get_contype(phandle_t macnode)
  128 {
  129         char val[32];
  130 
  131         if (OF_getprop(macnode, "phy-mode", val, sizeof(val)) <= 0 &&
  132             OF_getprop(macnode, "phy-connection-type", val, sizeof(val)) <= 0) {
  133                 return (MII_CONTYPE_UNKNOWN);
  134         }
  135         return (mii_fdt_contype_from_name(val));
  136 }
  137 
  138 void
  139 mii_fdt_free_config(struct mii_fdt_phy_config *cfg)
  140 {
  141 
  142         free(cfg, M_OFWPROP);
  143 }
  144 
  145 mii_fdt_phy_config_t *
  146 mii_fdt_get_config(device_t phydev)
  147 {
  148         mii_fdt_phy_config_t *cfg;
  149         device_t miibus, macdev;
  150         pcell_t val;
  151 
  152         miibus = device_get_parent(phydev);
  153         macdev = device_get_parent(miibus);
  154 
  155         cfg = malloc(sizeof(*cfg), M_OFWPROP, M_ZERO | M_WAITOK);
  156 
  157         /*
  158          * If we can't find our parent MAC's node, there's nothing more we can
  159          * fill in; cfg is already full of zero/default values, return it.
  160          */
  161         if ((cfg->macnode = ofw_bus_get_node(macdev)) == -1)
  162                 return (cfg);
  163 
  164         cfg->con_type = mii_fdt_get_contype(cfg->macnode);
  165 
  166         /*
  167          * If we can't find our own PHY node, there's nothing more we can fill
  168          * in, just return what we've got.
  169          */
  170         if ((cfg->phynode = mii_fdt_get_phynode(cfg->macnode)) == -1)
  171                 return (cfg);
  172 
  173         if (OF_getencprop(cfg->phynode, "max-speed", &val, sizeof(val)) > 0)
  174                 cfg->max_speed = val;
  175 
  176         if (ofw_bus_node_is_compatible(cfg->phynode,
  177             "ethernet-phy-ieee802.3-c45"))
  178                 cfg->flags |= MIIF_FDT_COMPAT_CLAUSE45;
  179 
  180         if (OF_hasprop(cfg->phynode, "broken-turn-around"))
  181                 cfg->flags |= MIIF_FDT_BROKEN_TURNAROUND;
  182         if (OF_hasprop(cfg->phynode, "enet-phy-lane-swap"))
  183                 cfg->flags |= MIIF_FDT_LANE_SWAP;
  184         if (OF_hasprop(cfg->phynode, "enet-phy-lane-no-swap"))
  185                 cfg->flags |= MIIF_FDT_NO_LANE_SWAP;
  186         if (OF_hasprop(cfg->phynode, "eee-broken-100tx"))
  187                 cfg->flags |= MIIF_FDT_EEE_BROKEN_100TX;
  188         if (OF_hasprop(cfg->phynode, "eee-broken-1000t"))
  189                 cfg->flags |= MIIF_FDT_EEE_BROKEN_1000T;
  190         if (OF_hasprop(cfg->phynode, "eee-broken-10gt"))
  191                 cfg->flags |= MIIF_FDT_EEE_BROKEN_10GT;
  192         if (OF_hasprop(cfg->phynode, "eee-broken-1000kx"))
  193                 cfg->flags |= MIIF_FDT_EEE_BROKEN_1000KX;
  194         if (OF_hasprop(cfg->phynode, "eee-broken-10gkx4"))
  195                 cfg->flags |= MIIF_FDT_EEE_BROKEN_10GKX4;
  196         if (OF_hasprop(cfg->phynode, "eee-broken-10gkr"))
  197                 cfg->flags |= MIIF_FDT_EEE_BROKEN_10GKR;
  198 
  199         return (cfg);
  200 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/mii_fdt.c

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sys/dev/mii/mii_fdt.c