1 /* $NetBSD: ingenic_dme.c,v 1.4 2020/04/02 13:03:03 nisimura Exp $ */
2
3 /*-
4 * Copyright (c) 2015 Michael Lorenz
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: ingenic_dme.c,v 1.4 2020/04/02 13:03:03 nisimura Exp $");
31
32 #include <sys/param.h>
33 #include <sys/intr.h>
34 #include <sys/bus.h>
35 #include <sys/device.h>
36 #include <sys/systm.h>
37
38 #include <mips/ingenic/ingenic_var.h>
39 #include <mips/ingenic/ingenic_regs.h>
40
41 #include <net/if.h>
42 #include <net/if_ether.h>
43 #include <net/if_media.h>
44 #include <dev/mii/miivar.h>
45
46 #include <dev/ic/dm9000var.h>
47 #include <dev/ic/dm9000reg.h>
48
49 #include "opt_ingenic.h"
50
51 static int ingenic_dme_match(device_t, struct cfdata *, void *);
52 static void ingenic_dme_attach(device_t, device_t, void *);
53 static int ingenic_dme_intr(void *);
54
55 CFATTACH_DECL_NEW(ingenic_dme, sizeof(struct dme_softc),
56 ingenic_dme_match, ingenic_dme_attach, NULL, NULL);
57
58 #define GPIO_DME_INT 19
59 #define GPIO_DME_INT_MASK (1 << GPIO_DME_INT)
60
61 /* ARGSUSED */
62 static int
ingenic_dme_match(device_t parent,struct cfdata * match,void * aux)63 ingenic_dme_match(device_t parent, struct cfdata *match, void *aux)
64 {
65 struct apbus_attach_args *aa = aux;
66
67 if (strcmp(aa->aa_name, "dme") != 0)
68 return 0;
69
70 return 1;
71 }
72
73 /* ARGSUSED */
74 static void
ingenic_dme_attach(device_t parent,device_t self,void * aux)75 ingenic_dme_attach(device_t parent, device_t self, void *aux)
76 {
77 struct dme_softc *sc = device_private(self);
78 struct apbus_attach_args *aa = aux;
79 prop_data_t eaddrprop;
80 void *ih;
81 static uint8_t enaddr[ETHER_ADDR_LEN];
82 int error;
83
84 sc->sc_dev = self;
85
86 sc->sc_iot = aa->aa_bst;
87 sc->dme_io = JZ_DME_IO;
88 sc->dme_data = JZ_DME_DATA;
89 sc->sc_phy_initialized = 0;
90
91 if (aa->aa_addr == 0)
92 aa->aa_addr = JZ_DME_BASE;
93
94 error = bus_space_map(aa->aa_bst, aa->aa_addr, 4, 0, &sc->sc_ioh);
95 if (error) {
96 aprint_error_dev(self,
97 "can't map registers for %s: %d\n", aa->aa_name, error);
98 return;
99 }
100
101 aprint_naive(": DM9000 Ethernet controller\n");
102 aprint_normal(": DM9000 Ethernet controller\n");
103
104
105 /* make sure the chip is powered up and not in reset */
106 gpio_as_output(1, 25);
107 gpio_set(1, 25, 1);
108 gpio_as_output(5, 12);
109 gpio_set(5, 12, 1);
110
111 /* setup pins to talk to the chip */
112 gpio_as_dev0(1, 1);
113 gpio_as_dev0(0, 0);
114 gpio_as_dev0(0, 1);
115 gpio_as_dev0(0, 2);
116 gpio_as_dev0(0, 3);
117 gpio_as_dev0(0, 4);
118 gpio_as_dev0(0, 5);
119 gpio_as_dev0(0, 6);
120 gpio_as_dev0(0, 7);
121
122 gpio_as_dev0(0, 16);
123 gpio_as_dev0(0, 17);
124 gpio_as_dev0(0, 26);
125
126 /* DM9000 interrupt is on GPIO E pin 19 */
127 gpio_as_intr_level(4, GPIO_DME_INT);
128 ih = evbmips_intr_establish(13, ingenic_dme_intr, sc);
129
130 if (ih == NULL) {
131 aprint_error_dev(self, "failed to establish interrupt %d\n",
132 13);
133 goto fail;
134 }
135 #if 0
136 eaddrprop = prop_dictionary_get(device_properties(self), "mac-address");
137
138 if (eaddrprop != NULL && prop_data_size(eaddrprop) == ETHER_ADDR_LEN) {
139 memcpy(enaddr, prop_data_data_nocopy(eaddrprop),
140 ETHER_ADDR_LEN);
141 aprint_debug_dev(self, "got MAC address!\n");
142 } else {
143 /*
144 * XXX
145 * if we don't get the MAC address as a property we hope like
146 * hell that uboot programmed it into the network chip
147 */
148 aprint_error_dev(self, "reading MAC address from chip\n");
149 dme_read_c(sc, DM9000_PAB0, enaddr, 6);
150 }
151 #else
152 (void)eaddrprop;
153 /*
154 * dme_attach checks dictionary, then previous setting, then roll
155 * a dice to make random MAC address
156 */
157 #endif
158 dme_attach(sc, enaddr);
159 return;
160 fail:
161 if (ih) {
162 evbmips_intr_disestablish(ih);
163 }
164 bus_space_unmap(sc->sc_iot, sc->sc_ioh, 4);
165 }
166
167 static int
ingenic_dme_intr(void * arg)168 ingenic_dme_intr(void *arg)
169 {
170 uint32_t reg;
171 int ret = 0;
172
173 /* see if it's us */
174 reg = readreg(JZ_GPIO_E_BASE + JZ_GPIO_FLAG);
175 if (reg & GPIO_DME_INT_MASK) {
176 /* yes, it's ours, handle it... */
177 ret = dme_intr(arg);
178 /* ... and clear it */
179 writereg(JZ_GPIO_E_BASE + JZ_GPIO_FLAGC, GPIO_DME_INT_MASK);
180 }
181 return ret;
182 }
183