if_mvneta_fdt.c

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    1 /*
    2  * Copyright (c) 2017 Stormshield.
    3  * Copyright (c) 2017 Semihalf.
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   18  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
   19  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   20  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   21  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   23  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   24  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   25  * POSSIBILITY OF SUCH DAMAGE.
   26  */
   27 
   28 #include "opt_platform.h"
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD$");
   31 
   32 #include <sys/param.h>
   33 #include <sys/systm.h>
   34 #include <sys/kernel.h>
   35 #include <sys/module.h>
   36 #include <sys/bus.h>
   37 #include <sys/rman.h>
   38 #include <sys/socket.h>
   39 #include <sys/taskqueue.h>
   40 
   41 #include <net/ethernet.h>
   42 #include <net/if.h>
   43 #include <net/if_media.h>
   44 
   45 #include <netinet/in.h>
   46 #include <netinet/ip.h>
   47 #include <netinet/tcp_lro.h>
   48 
   49 #include <machine/bus.h>
   50 #include <machine/resource.h>
   51 
   52 #include <dev/ofw/ofw_bus.h>
   53 #include <dev/ofw/ofw_bus_subr.h>
   54 
   55 #include <dev/mii/mii.h>
   56 #include <dev/mii/miivar.h>
   57 
   58 #include "if_mvnetareg.h"
   59 #include "if_mvnetavar.h"
   60 
   61 #ifdef MVNETA_DEBUG
   62 #define STATIC /* nothing */
   63 #else
   64 #define STATIC static
   65 #endif
   66 
   67 #define PHY_MODE_MAXLEN 10
   68 #define INBAND_STATUS_MAXLEN 16
   69 
   70 static int mvneta_fdt_probe(device_t);
   71 static int mvneta_fdt_attach(device_t);
   72 STATIC boolean_t mvneta_find_ethernet_prop_switch(phandle_t, phandle_t);
   73 
   74 static device_method_t mvneta_fdt_methods[] = {
   75         /* Device interface */
   76         DEVMETHOD(device_probe,         mvneta_fdt_probe),
   77         DEVMETHOD(device_attach,        mvneta_fdt_attach),
   78 
   79         /* End */
   80         DEVMETHOD_END
   81 };
   82 
   83 DEFINE_CLASS_1(mvneta, mvneta_fdt_driver, mvneta_fdt_methods,
   84     sizeof(struct mvneta_softc), mvneta_driver);
   85 
   86 DRIVER_MODULE(mvneta, ofwbus, mvneta_fdt_driver, 0, 0);
   87 DRIVER_MODULE(mvneta, simplebus, mvneta_fdt_driver, 0, 0);
   88 
   89 static int mvneta_fdt_phy_acquire(device_t);
   90 
   91 static struct ofw_compat_data compat_data[] = {
   92         {"marvell,armada-370-neta",     true},
   93         {"marvell,armada-3700-neta",    true},
   94         {NULL,                          false}
   95 };
   96 
   97 SIMPLEBUS_PNP_INFO(compat_data);
   98 
   99 static int
  100 mvneta_fdt_probe(device_t dev)
  101 {
  102 
  103         if (!ofw_bus_status_okay(dev))
  104                 return (ENXIO);
  105 
  106         if (!ofw_bus_search_compatible(dev, compat_data)->ocd_data)
  107                 return (ENXIO);
  108 
  109         device_set_desc(dev, "NETA controller");
  110         return (BUS_PROBE_DEFAULT);
  111 }
  112 
  113 static int
  114 mvneta_fdt_attach(device_t dev)
  115 {
  116         struct mvneta_softc *sc;
  117         uint32_t tx_csum_limit;
  118         int err;
  119 
  120         sc = device_get_softc(dev);
  121 
  122         /* Try to fetch PHY information from FDT */
  123         err = mvneta_fdt_phy_acquire(dev);
  124         if (err != 0)
  125                 return (err);
  126 
  127         if (ofw_bus_is_compatible(dev, "marvell,armada-370-neta")) {
  128                 tx_csum_limit = MVNETA_A370_MAX_CSUM_MTU;
  129         } else {
  130                 tx_csum_limit = MVNETA_A3700_MAX_CSUM_MTU;
  131         }
  132 
  133         if (ofw_bus_has_prop(dev, "tx-csum-limit")) {
  134                 err = OF_getencprop(ofw_bus_get_node(dev), "tx-csum-limit",
  135                             &tx_csum_limit, sizeof(tx_csum_limit));
  136                 if (err <= 0) {
  137                         device_printf(dev,
  138                                 "Failed to acquire tx-csum-limit property\n");
  139                         return (ENXIO);
  140                 }
  141         }
  142         sc->tx_csum_limit = tx_csum_limit;
  143 
  144         return (mvneta_attach(dev));
  145 }
  146 
  147 static int
  148 mvneta_fdt_phy_acquire(device_t dev)
  149 {
  150         struct mvneta_softc *sc;
  151         phandle_t node, child, phy_handle;
  152         char phymode[PHY_MODE_MAXLEN];
  153         char managed[INBAND_STATUS_MAXLEN];
  154         char *name;
  155 
  156         sc = device_get_softc(dev);
  157         node = ofw_bus_get_node(dev);
  158 
  159         /* PHY mode is crucial */
  160         if (OF_getprop(node, "phy-mode", phymode, sizeof(phymode)) <= 0) {
  161                 device_printf(dev, "Failed to acquire PHY mode from FDT.\n");
  162                 return (ENXIO);
  163         }
  164 
  165         if (strncmp(phymode, "rgmii-id", 8) == 0)
  166                 sc->phy_mode = MVNETA_PHY_RGMII_ID;
  167         else if (strncmp(phymode, "rgmii", 5) == 0)
  168                 sc->phy_mode = MVNETA_PHY_RGMII;
  169         else if (strncmp(phymode, "sgmii", 5) == 0)
  170                 sc->phy_mode = MVNETA_PHY_SGMII;
  171         else if (strncmp(phymode, "qsgmii", 6) == 0)
  172                 sc->phy_mode = MVNETA_PHY_QSGMII;
  173         else
  174                 sc->phy_mode = MVNETA_PHY_SGMII;
  175 
  176         /* Check if in-band link status will be used */
  177         if (OF_getprop(node, "managed", managed, sizeof(managed)) > 0) {
  178                 if (strncmp(managed, "in-band-status", 14) == 0) {
  179                         sc->use_inband_status = TRUE;
  180                         device_printf(dev, "Use in-band link status.\n");
  181                         return (0);
  182                 }
  183         }
  184 
  185         if (OF_getencprop(node, "phy", (void *)&phy_handle,
  186             sizeof(phy_handle)) <= 0) {
  187                 /* Test for fixed-link (present i.e. in 388-gp) */
  188                 for (child = OF_child(node); child != 0; child = OF_peer(child)) {
  189                         if (OF_getprop_alloc(child,
  190                             "name", (void **)&name) <= 0) {
  191                                 continue;
  192                         }
  193                         if (strncmp(name, "fixed-link", 10) == 0) {
  194                                 free(name, M_OFWPROP);
  195                                 if (OF_getencprop(child, "speed",
  196                                     &sc->phy_speed, sizeof(sc->phy_speed)) <= 0) {
  197                                         if (bootverbose) {
  198                                                 device_printf(dev,
  199                                                     "No PHY information.\n");
  200                                         }
  201                                         return (ENXIO);
  202                                 }
  203                                 if (OF_hasprop(child, "full-duplex"))
  204                                         sc->phy_fdx = TRUE;
  205                                 else
  206                                         sc->phy_fdx = FALSE;
  207 
  208                                 /* Keep this flag just for the record */
  209                                 sc->phy_addr = MII_PHY_ANY;
  210 
  211                                 return (0);
  212                         }
  213                         free(name, M_OFWPROP);
  214                 }
  215                 if (bootverbose) {
  216                         device_printf(dev,
  217                             "Could not find PHY information in FDT.\n");
  218                 }
  219                 return (ENXIO);
  220         } else {
  221                 phy_handle = OF_instance_to_package(phy_handle);
  222                 if (OF_getencprop(phy_handle, "reg", &sc->phy_addr,
  223                     sizeof(sc->phy_addr)) <= 0) {
  224                         device_printf(dev,
  225                             "Could not find PHY address in FDT.\n");
  226                         return (ENXIO);
  227                 }
  228         }
  229 
  230         return (0);
  231 }
  232 
  233 int
  234 mvneta_fdt_mac_address(struct mvneta_softc *sc, uint8_t *addr)
  235 {
  236         phandle_t node;
  237         uint8_t lmac[ETHER_ADDR_LEN];
  238         uint8_t zeromac[] = {[0 ... (ETHER_ADDR_LEN - 1)] = 0};
  239         int len;
  240 
  241         /*
  242          * Retrieve hw address from the device tree.
  243          */
  244         node = ofw_bus_get_node(sc->dev);
  245         if (node == 0)
  246                 return (ENXIO);
  247 
  248         len = OF_getprop(node, "local-mac-address", (void *)lmac, sizeof(lmac));
  249         if (len != ETHER_ADDR_LEN)
  250                 return (ENOENT);
  251 
  252         if (memcmp(lmac, zeromac, ETHER_ADDR_LEN) == 0) {
  253                 /* Invalid MAC address (all zeros) */
  254                 return (EINVAL);
  255         }
  256         memcpy(addr, lmac, ETHER_ADDR_LEN);
  257 
  258         return (0);
  259 }
  260 
  261 STATIC boolean_t
  262 mvneta_find_ethernet_prop_switch(phandle_t ethernet, phandle_t node)
  263 {
  264         boolean_t ret;
  265         phandle_t child, switch_eth_handle, switch_eth;
  266 
  267         for (child = OF_child(node); child != 0; child = OF_peer(child)) {
  268                 if (OF_getencprop(child, "ethernet", (void*)&switch_eth_handle,
  269                     sizeof(switch_eth_handle)) > 0) {
  270                         if (switch_eth_handle > 0) {
  271                                 switch_eth = OF_node_from_xref(
  272                                     switch_eth_handle);
  273 
  274                                 if (switch_eth == ethernet)
  275                                         return (true);
  276                         }
  277                 }
  278 
  279                 ret = mvneta_find_ethernet_prop_switch(ethernet, child);
  280                 if (ret != 0)
  281                         return (ret);
  282         }
  283 
  284         return (false);
  285 }
  286 
  287 boolean_t
  288 mvneta_has_switch_fdt(device_t self)
  289 {
  290         phandle_t node;
  291 
  292         node = ofw_bus_get_node(self);
  293 
  294         return mvneta_find_ethernet_prop_switch(node, OF_finddevice("/"));
  295 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/neta/if_mvneta_fdt.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/neta/if_mvneta_fdt.c
