dp83822phy.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10

    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2021 Alstom Group.
    5  * Copyright (c) 2021 Semihalf.
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  */
   29 
   30 /*
   31  * Driver for TI DP83822 Ethernet PHY
   32  */
   33 
   34 #include <sys/cdefs.h>
   35 __FBSDID("$FreeBSD$");
   36 
   37 #include <sys/param.h>
   38 #include <sys/bus.h>
   39 #include <sys/kernel.h>
   40 #include <sys/module.h>
   41 #include <sys/resource.h>
   42 #include <sys/rman.h>
   43 #include <sys/socket.h>
   44 
   45 #include <machine/resource.h>
   46 
   47 #include <net/if.h>
   48 #include <net/if_media.h>
   49 
   50 #include <dev/mii/mii.h>
   51 #include <dev/mii/miivar.h>
   52 
   53 #include "miidevs.h"
   54 #include "miibus_if.h"
   55 
   56 #define BIT(x)                  (1 << (x))
   57 
   58 #define DP83822_PHYSTS                  0x10
   59 #define DP83822_PHYSTS_LINK_UP          BIT(0)
   60 #define DP83822_PHYSTS_SPEED_100        BIT(1)
   61 #define DP83822_PHYSTS_FD               BIT(2)
   62 
   63 #define DP83822_PHYSCR          0x11
   64 #define DP83822_PHYSCR_INT_OE   BIT(0)  /* Behaviour of INT pin. */
   65 #define DP83822_PHYSCR_INT_EN   BIT(1)
   66 
   67 #define DP83822_MISR1                   0x12
   68 #define DP83822_MISR1_AN_CMPL_EN        BIT(2)
   69 #define DP83822_MISR1_DP_CHG_EN         BIT(3)
   70 #define DP83822_MISR1_SPD_CHG_EN        BIT(4)
   71 #define DP83822_MISR1_LINK_CHG_EN       BIT(5)
   72 #define DP83822_MISR1_INT_MASK          0xFF
   73 #define DP83822_MISR1_INT_STS_SHIFT     8
   74 
   75 #define DP83822_MISR2                   0x13
   76 #define DP83822_MISR2_AN_ERR_EN         BIT(6)
   77 #define DP83822_MISR2_INT_MASK          0xFF
   78 #define DP83822_MISR2_INT_STS_SHIFT     8
   79 
   80 static int dp_service(struct mii_softc*, struct mii_data*, int);
   81 
   82 struct dp83822_softc {
   83         struct mii_softc mii_sc;
   84         struct resource *irq_res;
   85         void            *irq_cookie;
   86 };
   87 
   88 static const struct mii_phydesc dpphys[] = {
   89         MII_PHY_DESC(xxTI, DP83822),
   90         MII_PHY_END
   91 };
   92 
   93 static const struct mii_phy_funcs dpphy_funcs = {
   94         dp_service,
   95         ukphy_status,
   96         mii_phy_reset
   97 };
   98 
   99 static void
  100 dp_intr(void *arg)
  101 {
  102         struct mii_softc *sc = (struct mii_softc *)arg;
  103         uint32_t status;
  104 
  105         status = PHY_READ(sc, DP83822_MISR1);
  106 
  107         if (!((status >> DP83822_MISR1_INT_STS_SHIFT) &
  108             (status & DP83822_MISR1_INT_MASK)))
  109                 return;
  110 
  111         PHY_STATUS(sc);
  112         mii_phy_update(sc, MII_MEDIACHG);
  113 }
  114 
  115 static int
  116 dp_probe(device_t dev)
  117 {
  118 
  119         return (mii_phy_dev_probe(dev, dpphys, BUS_PROBE_DEFAULT));
  120 }
  121 
  122 static int
  123 dp_attach(device_t dev)
  124 {
  125         struct dp83822_softc *sc;
  126         struct mii_softc *mii_sc;
  127         uint32_t value;
  128         int error, rid;
  129 
  130         sc = device_get_softc(dev);
  131         mii_sc = &sc->mii_sc;
  132         mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &dpphy_funcs, 1);
  133 
  134         PHY_RESET(mii_sc);
  135 
  136         rid = 0;
  137         sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
  138         if (sc->irq_res == NULL)
  139                 goto no_irq;
  140 
  141         error = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET | INTR_MPSAFE,
  142             NULL, dp_intr, sc, &sc->irq_cookie);
  143         if (error != 0) {
  144                 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res);
  145                 sc->irq_res = NULL;
  146                 goto no_irq;
  147         }
  148 
  149         /*
  150          * ACK and unmask all relevant interrupts.
  151          * We have a single register that serves the purpose
  152          * of both interrupt status and mask.
  153          * Interrupts are cleared on read.
  154          */
  155         (void)PHY_READ(mii_sc, DP83822_MISR1);
  156         value = DP83822_MISR1_AN_CMPL_EN |
  157                 DP83822_MISR1_DP_CHG_EN  |
  158                 DP83822_MISR1_SPD_CHG_EN |
  159                 DP83822_MISR1_LINK_CHG_EN;
  160         PHY_WRITE(mii_sc, DP83822_MISR1, value);
  161         value = PHY_READ(mii_sc, DP83822_PHYSCR);
  162         value |= DP83822_PHYSCR_INT_OE |
  163                  DP83822_PHYSCR_INT_EN;
  164         PHY_WRITE(mii_sc, DP83822_PHYSCR, value);
  165 
  166 no_irq:
  167         return (0);
  168 }
  169 
  170 static int
  171 dp_detach(device_t dev)
  172 {
  173         struct dp83822_softc *sc;
  174 
  175         sc = device_get_softc(dev);
  176 
  177         bus_teardown_intr(dev, sc->irq_res, sc->irq_cookie);
  178         bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res);
  179 
  180         return (mii_phy_detach(dev));
  181 }
  182 
  183 static int
  184 dp_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  185 {
  186 
  187         switch (cmd) {
  188         case MII_POLLSTAT:
  189                 break;
  190         case MII_MEDIACHG:
  191                 mii_phy_setmedia(sc);
  192                 break;
  193         case MII_TICK:
  194                 if (mii_phy_tick(sc) == EJUSTRETURN)
  195                         return (0);
  196 
  197                 break;
  198         }
  199 
  200         PHY_STATUS(sc);
  201         mii_phy_update(sc, cmd);
  202         return (0);
  203 }
  204 
  205 static device_method_t dp_methods[] = {
  206         DEVMETHOD(device_probe,         dp_probe),
  207         DEVMETHOD(device_attach,        dp_attach),
  208         DEVMETHOD(device_detach,        dp_detach),
  209         DEVMETHOD_END
  210 };
  211 
  212 static driver_t dp_driver = {
  213         "dp83822phy",
  214         dp_methods,
  215         sizeof(struct dp83822_softc)
  216 };
  217 
  218 DRIVER_MODULE(dp83822phy, miibus, dp_driver, 0, 0);

Cache object: ba18cafe5da99b21ff6a385c896d063f

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.

FreeBSD/Linux Kernel Cross Reference sys/dev/mii/dp83822phy.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/mii/dp83822phy.c