1 /* $OpenBSD: leioc.c,v 1.1 2016/11/17 14:41:21 visa Exp $ */
2
3 /*
4 * Copyright (c) 2016 Visa Hankala
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 /*
20 * Driver for the Loongson 3A low-end IO controller.
21 *
22 * Each Loongson 3A CPU package has a built-in `low-end' IO controller.
23 * The controller provides GPIO, LPCI, PCI, SPI, and UART interfaces.
24 */
25
26 #include <sys/param.h>
27 #include <sys/systm.h>
28 #include <sys/device.h>
29 #include <sys/kernel.h>
30
31 #include <machine/autoconf.h>
32
33 #include <loongson/dev/leiocreg.h>
34 #include <loongson/dev/leiocvar.h>
35
36 int leioc_match(struct device *, void *, void*);
37 void leioc_attach(struct device *, struct device *, void *);
38
39 const struct cfattach leioc_ca = {
40 sizeof(struct device), leioc_match, leioc_attach
41 };
42
43 struct cfdriver leioc_cd = {
44 NULL, "leioc", DV_DULL
45 };
46
47 struct mips_bus_space leioc_io_space_tag = {
48 .bus_base = PHYS_TO_XKPHYS(0, CCA_NC),
49 ._space_read_1 = generic_space_read_1,
50 ._space_write_1 = generic_space_write_1,
51 ._space_map = generic_space_map,
52 ._space_unmap = generic_space_unmap
53 };
54
55 int
leioc_match(struct device * parent,void * cfg,void * aux)56 leioc_match(struct device *parent, void *cfg, void *aux)
57 {
58 struct mainbus_attach_args *maa = aux;
59
60 if (loongson_ver != 0x3a && loongson_ver != 0x3b)
61 return 0;
62
63 if (strcmp(maa->maa_name, leioc_cd.cd_name) != 0)
64 return 0;
65
66 return 1;
67 }
68
69 void
leioc_attach(struct device * parent,struct device * self,void * aux)70 leioc_attach(struct device *parent, struct device *self, void *aux)
71 {
72 struct leioc_attach_args laa;
73
74 printf("\n");
75
76 laa.laa_name = "com";
77 laa.laa_iot = &leioc_io_space_tag;
78 laa.laa_base = LEIOC_UART0_BASE;
79 config_found(self, &laa, NULL);
80 laa.laa_base = LEIOC_UART1_BASE;
81 config_found(self, &laa, NULL);
82 }
83