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      1 /* $NetBSD: rgmii.c,v 1.2 2020/07/06 09:34:17 rin Exp $ */
      2 /*
      3  * Copyright (c) 2010 KIYOHARA Takashi
      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 <sys/cdefs.h>
     29 __KERNEL_RCSID(0, "$NetBSD: rgmii.c,v 1.2 2020/07/06 09:34:17 rin Exp $");
     30 
     31 #include <sys/param.h>
     32 #include <sys/bus.h>
     33 #include <sys/device.h>
     34 
     35 #include <net/if.h>
     36 #include <net/if_media.h>
     37 
     38 #include <powerpc/ibm4xx/dev/rgmiireg.h>
     39 #include <powerpc/ibm4xx/dev/rmiivar.h>
     40 #include <powerpc/ibm4xx/dev/opbvar.h>
     41 
     42 
     43 static void rgmii_enable(device_t, int);
     44 static void rgmii_disable(device_t, int);
     45 static void rgmii_speed(device_t, int, int);
     46 
     47 
     48 void
     49 rgmii_attach(device_t self, int instance,
     50 	     void (**enable)(device_t, int),
     51 	     void (**disable)(device_t, int),
     52 	     void (**speed)(device_t, int, int))
     53 {
     54 	struct opb_softc *sc = device_private(self);
     55 	uint32_t ssr;
     56 
     57 	instance %= 2;
     58 
     59 	rgmii_disable(self, instance);
     60 	ssr = bus_space_read_4(sc->sc_iot, sc->sc_rgmiih, RGMII0_SSR);
     61 	ssr &= ~SSR_SP(instance, SSR_SP_MASK);
     62 	bus_space_write_4(sc->sc_iot, sc->sc_rgmiih, RGMII0_SSR, ssr);
     63 
     64 	*enable = rgmii_enable;
     65 	*disable = rgmii_disable;
     66 	*speed = rgmii_speed;
     67 }
     68 
     69 static void
     70 rgmii_enable(device_t self, int instance)
     71 {
     72 	struct opb_softc *sc = device_private(self);
     73 	uint32_t fer;
     74 
     75 	instance %= 2;
     76 
     77 	fer = bus_space_read_4(sc->sc_iot, sc->sc_rgmiih, RGMII0_FER);
     78 	fer &= ~FER_MDIOEN_MASK;
     79 	fer |= FER_MDIOEN(instance);
     80 	bus_space_write_4(sc->sc_iot, sc->sc_rgmiih, RGMII0_FER, fer);
     81 }
     82 
     83 static void
     84 rgmii_disable(device_t self, int instance)
     85 {
     86 	struct opb_softc *sc = device_private(self);
     87 	uint32_t fer;
     88 
     89 	instance %= 2;
     90 
     91 	fer = bus_space_read_4(sc->sc_iot, sc->sc_rgmiih, RGMII0_FER);
     92 	fer &= ~FER_MDIOEN_MASK;
     93 	bus_space_write_4(sc->sc_iot, sc->sc_rgmiih, RGMII0_FER, fer);
     94 }
     95 
     96 static void
     97 rgmii_speed(device_t self, int instance, int speed)
     98 {
     99 	struct opb_softc *sc = device_private(self);
    100 	uint32_t ssr;
    101 
    102 	instance %= 2;
    103 
    104 	ssr = bus_space_read_4(sc->sc_iot, sc->sc_rgmiih, RGMII0_SSR);
    105 	ssr &= ~SSR_SP(instance, SSR_SP_MASK);
    106 	switch (speed) {
    107 	case IFM_1000_T:
    108 		ssr |= SSR_SP(instance, SSR_SP_1000MBPS);
    109 		break;
    110 	case IFM_100_TX:
    111 		ssr |= SSR_SP(instance, SSR_SP_100MBPS);
    112 		break;
    113 	case IFM_10_T:
    114 		ssr |= SSR_SP(instance, SSR_SP_10MBPS);
    115 		break;
    116 	}
    117 	bus_space_write_4(sc->sc_iot, sc->sc_rgmiih, RGMII0_SSR, ssr);
    118 }
    119