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      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 (at) 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 
     47 extern struct powerpc_bus_dma_tag wii_mem2_bus_dma_tag;
     48 
     49 static int	sdhc_ahb_match(device_t, cfdata_t, void *);
     50 static void	sdhc_ahb_attach(device_t, device_t, void *);
     51 
     52 struct sdhc_ahb_softc {
     53 	struct sdhc_softc	sc_base;
     54 	struct sdhc_host	*sc_host[1];
     55 };
     56 
     57 CFATTACH_DECL_NEW(sdhc_ahb, sizeof(struct sdhc_ahb_softc),
     58 	sdhc_ahb_match, sdhc_ahb_attach, NULL, NULL);
     59 
     60 static int
     61 sdhc_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 
     68 static void
     69 sdhc_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