1 /*-
2 * Copyright (c) 2015 Luiz Otavio O Souza <loos@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/param.h>
28 #include <sys/systm.h>
29 #include <sys/bus.h>
30 #include <sys/kernel.h>
31 #include <sys/socket.h>
32 #include <sys/module.h>
33
34 #include <net/if.h>
35 #include <net/if_media.h>
36
37 #include <machine/bus.h>
38
39 #include <dev/mii/miivar.h>
40
41 #include <dev/ofw/ofw_bus.h>
42 #include <dev/ofw/ofw_bus_subr.h>
43
44 #include <dev/clk/clk.h>
45 #include <dev/hwreset/hwreset.h>
46 #include <dev/regulator/regulator.h>
47
48 #include <arm/allwinner/aw_machdep.h>
49
50 #include <dev/dwc/if_dwcvar.h>
51 #include <dev/dwc/dwc1000_reg.h>
52
53 #include "if_dwc_if.h"
54
55 static int
a20_if_dwc_probe(device_t dev)56 a20_if_dwc_probe(device_t dev)
57 {
58
59 if (!ofw_bus_status_okay(dev))
60 return (ENXIO);
61 if (!ofw_bus_is_compatible(dev, "allwinner,sun7i-a20-gmac"))
62 return (ENXIO);
63 device_set_desc(dev, "A20 Gigabit Ethernet Controller");
64
65 return (BUS_PROBE_DEFAULT);
66 }
67
68 static int
a20_if_dwc_init(device_t dev)69 a20_if_dwc_init(device_t dev)
70 {
71 struct dwc_softc *sc;
72 const char *tx_parent_name;
73 clk_t clk_tx, clk_tx_parent;
74 regulator_t reg;
75 int error;
76
77 sc = device_get_softc(dev);
78
79 /* Configure PHY for MII or RGMII mode */
80 switch(sc->phy_mode) {
81 case MII_CONTYPE_RGMII:
82 case MII_CONTYPE_RGMII_ID:
83 case MII_CONTYPE_RGMII_RXID:
84 case MII_CONTYPE_RGMII_TXID:
85 tx_parent_name = "gmac_int_tx";
86 break;
87 case MII_CONTYPE_MII:
88 tx_parent_name = "mii_phy_tx";
89 break;
90 default:
91 device_printf(dev, "unsupported PHY connection type: %d",
92 sc->phy_mode);
93 return (ENXIO);
94 }
95
96 error = clk_get_by_ofw_name(dev, 0, "allwinner_gmac_tx", &clk_tx);
97 if (error != 0) {
98 device_printf(dev, "could not get tx clk\n");
99 return (error);
100 }
101 error = clk_get_by_name(dev, tx_parent_name, &clk_tx_parent);
102 if (error != 0) {
103 device_printf(dev, "could not get clock '%s'\n",
104 tx_parent_name);
105 return (error);
106 }
107 error = clk_set_parent_by_clk(clk_tx, clk_tx_parent);
108 if (error != 0) {
109 device_printf(dev, "could not set tx clk parent\n");
110 return (error);
111 }
112
113 /* Enable PHY regulator if applicable */
114 if (regulator_get_by_ofw_property(dev, 0, "phy-supply", ®) == 0) {
115 error = regulator_enable(reg);
116 if (error != 0) {
117 device_printf(dev, "could not enable PHY regulator\n");
118 return (error);
119 }
120 }
121
122 return (0);
123 }
124
125 static int
a20_if_dwc_mii_clk(device_t dev)126 a20_if_dwc_mii_clk(device_t dev)
127 {
128
129 return (GMAC_MII_CLK_150_250M_DIV102);
130 }
131
132 static device_method_t a20_dwc_methods[] = {
133 DEVMETHOD(device_probe, a20_if_dwc_probe),
134
135 DEVMETHOD(if_dwc_init, a20_if_dwc_init),
136 DEVMETHOD(if_dwc_mii_clk, a20_if_dwc_mii_clk),
137
138 DEVMETHOD_END
139 };
140
141 extern driver_t dwc_driver;
142
143 DEFINE_CLASS_1(dwc, a20_dwc_driver, a20_dwc_methods, sizeof(struct dwc_softc),
144 dwc_driver);
145 DRIVER_MODULE(a20_dwc, simplebus, a20_dwc_driver, 0, 0);
146
147 MODULE_DEPEND(a20_dwc, dwc, 1, 1, 1);
148