1/* $NetBSD: sdhc_ahb.c,v 1.1 2026/01/09 22:54:30 jmcneill Exp $ */
2
3/*-
4 * Copyright (c) 2024 Jared McNeill <jmcneill@invisible.ca>
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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__KERNEL_RCSID(0, "$NetBSD: sdhc_ahb.c,v 1.1 2026/01/09 22:54:30 jmcneill Exp $");
31
32#include <sys/param.h>
33#include <sys/bus.h>
34#include <sys/device.h>
35#include <sys/systm.h>
36
37#include <dev/sdmmc/sdhcreg.h>
38#include <dev/sdmmc/sdhcvar.h>
39#include <dev/sdmmc/sdmmcvar.h>
40
41#include <machine/wii.h>
42#include <machine/wiiu.h>
43#include "ahb.h"
44
45#define SDHC_SIZE			0x200
46
47extern struct powerpc_bus_dma_tag wii_mem2_bus_dma_tag;
48
49static int	sdhc_ahb_match(device_t, cfdata_t, void *);
50static void	sdhc_ahb_attach(device_t, device_t, void *);
51
52struct sdhc_ahb_softc {
53	struct sdhc_softc	sc_base;
54	struct sdhc_host	*sc_host[1];
55};
56
57CFATTACH_DECL_NEW(sdhc_ahb, sizeof(struct sdhc_ahb_softc),
58	sdhc_ahb_match, sdhc_ahb_attach, NULL, NULL);
59
60static int
61sdhc_ahb_match(device_t parent, cfdata_t cf, void *aux)
62{
63	struct ahb_attach_args *aaa = aux;
64
65	return wiiu_native || aaa->aaa_irq < 32;
66}
67
68static void
69sdhc_ahb_attach(device_t parent, device_t self, void *aux)
70{
71	struct ahb_attach_args *aaa = aux;
72	struct sdhc_ahb_softc *sc = device_private(self);
73	bus_space_tag_t bst;
74	bus_space_handle_t bsh;
75	int error;
76
77	sc->sc_base.sc_dev = self;
78	sc->sc_base.sc_host = sc->sc_host;
79	sc->sc_base.sc_dmat = &wii_mem2_bus_dma_tag;
80	sc->sc_base.sc_flags = SDHC_FLAG_SINGLE_POWER_WRITE |
81			       SDHC_FLAG_32BIT_ACCESS |
82			       SDHC_FLAG_USE_DMA;
83	sc->sc_base.sc_dma_align_mask = 0x1f;
84	if (wiiu_plat) {
85		sc->sc_base.sc_flags |= SDHC_FLAG_NO_PWR0;
86	}
87
88	bst = aaa->aaa_bst;
89	if (bus_space_map(bst, aaa->aaa_addr, SDHC_SIZE, 0, &bsh)) {
90		aprint_error(": couldn't map registers\n");
91		return;
92	}
93
94	aprint_naive("\n");
95	aprint_normal(": SDHC\n");
96
97	ahb_claim_device(self,
98	    device_unit(self) == 0 ? IOPSD0EN : IOPSD1EN);
99
100	ahb_intr_establish(aaa->aaa_irq, IPL_SDMMC, sdhc_intr,
101	    &sc->sc_base, device_xname(self));
102
103	error = sdhc_host_found(&sc->sc_base, bst, bsh, SDHC_SIZE);
104	if (error != 0) {
105		aprint_error_dev(self,
106		    "couldn't initialize host, error = %d\n", error);
107	}
108}
109