1 /*-
2 * Copyright (c) 2015 Luiz Otavio O Souza <[email protected]>
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/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/bus.h>
33 #include <sys/kernel.h>
34 #include <sys/module.h>
35
36 #include <machine/bus.h>
37
38 #include <dev/dwc/if_dwc.h>
39 #include <dev/dwc/if_dwcvar.h>
40 #include <dev/ofw/ofw_bus.h>
41 #include <dev/ofw/ofw_bus_subr.h>
42
43 #include <arm/allwinner/aw_machdep.h>
44 #include <dev/extres/clk/clk.h>
45 #include <dev/extres/regulator/regulator.h>
46
47 #include "if_dwc_if.h"
48
49 static int
a20_if_dwc_probe(device_t dev)50 a20_if_dwc_probe(device_t dev)
51 {
52
53 if (!ofw_bus_status_okay(dev))
54 return (ENXIO);
55 if (!ofw_bus_is_compatible(dev, "allwinner,sun7i-a20-gmac"))
56 return (ENXIO);
57 device_set_desc(dev, "A20 Gigabit Ethernet Controller");
58
59 return (BUS_PROBE_DEFAULT);
60 }
61
62 static int
a20_if_dwc_init(device_t dev)63 a20_if_dwc_init(device_t dev)
64 {
65 const char *tx_parent_name;
66 char *phy_type;
67 clk_t clk_tx, clk_tx_parent;
68 regulator_t reg;
69 phandle_t node;
70 int error;
71
72 node = ofw_bus_get_node(dev);
73
74 /* Configure PHY for MII or RGMII mode */
75 if (OF_getprop_alloc(node, "phy-mode", (void **)&phy_type)) {
76 error = clk_get_by_ofw_name(dev, 0, "allwinner_gmac_tx", &clk_tx);
77 if (error != 0) {
78 device_printf(dev, "could not get tx clk\n");
79 return (error);
80 }
81
82 if (strcmp(phy_type, "rgmii") == 0)
83 tx_parent_name = "gmac_int_tx";
84 else
85 tx_parent_name = "mii_phy_tx";
86
87 error = clk_get_by_name(dev, tx_parent_name, &clk_tx_parent);
88 if (error != 0) {
89 device_printf(dev, "could not get clock '%s'\n",
90 tx_parent_name);
91 return (error);
92 }
93
94 error = clk_set_parent_by_clk(clk_tx, clk_tx_parent);
95 if (error != 0) {
96 device_printf(dev, "could not set tx clk parent\n");
97 return (error);
98 }
99 }
100
101 /* Enable PHY regulator if applicable */
102 if (regulator_get_by_ofw_property(dev, 0, "phy-supply", ®) == 0) {
103 error = regulator_enable(reg);
104 if (error != 0) {
105 device_printf(dev, "could not enable PHY regulator\n");
106 return (error);
107 }
108 }
109
110 return (0);
111 }
112
113 static int
a20_if_dwc_mac_type(device_t dev)114 a20_if_dwc_mac_type(device_t dev)
115 {
116
117 return (DWC_GMAC_NORMAL_DESC);
118 }
119
120 static int
a20_if_dwc_mii_clk(device_t dev)121 a20_if_dwc_mii_clk(device_t dev)
122 {
123
124 return (GMAC_MII_CLK_150_250M_DIV102);
125 }
126
127 static device_method_t a20_dwc_methods[] = {
128 DEVMETHOD(device_probe, a20_if_dwc_probe),
129
130 DEVMETHOD(if_dwc_init, a20_if_dwc_init),
131 DEVMETHOD(if_dwc_mac_type, a20_if_dwc_mac_type),
132 DEVMETHOD(if_dwc_mii_clk, a20_if_dwc_mii_clk),
133
134 DEVMETHOD_END
135 };
136
137 static devclass_t a20_dwc_devclass;
138
139 extern driver_t dwc_driver;
140
141 DEFINE_CLASS_1(dwc, a20_dwc_driver, a20_dwc_methods, sizeof(struct dwc_softc),
142 dwc_driver);
143 DRIVER_MODULE(a20_dwc, simplebus, a20_dwc_driver, a20_dwc_devclass, 0, 0);
144
145 MODULE_DEPEND(a20_dwc, dwc, 1, 1, 1);
146