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
rgmii_attach(device_t self,int instance,void (** enable)(device_t,int),void (** disable)(device_t,int),void (** speed)(device_t,int,int))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
rgmii_enable(device_t self,int instance)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
rgmii_disable(device_t self,int instance)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
rgmii_speed(device_t self,int instance,int speed)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