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      1 /*	$NetBSD: bcm2838_emmc2_acpi.c,v 1.3 2022/02/06 15:52:20 jmcneill Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2021 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. The name of the author may not be used to endorse or promote products
     13  *    derived from this software without specific prior written permission.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     20  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     21  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     22  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     23  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     25  * SUCH DAMAGE.
     26  */
     27 
     28 #include <sys/cdefs.h>
     29 __KERNEL_RCSID(0, "$NetBSD: bcm2838_emmc2_acpi.c,v 1.3 2022/02/06 15:52:20 jmcneill Exp $");
     30 
     31 #include <sys/param.h>
     32 #include <sys/device.h>
     33 #include <sys/systm.h>
     34 #include <sys/kmem.h>
     35 
     36 #include <dev/acpi/acpireg.h>
     37 #include <dev/acpi/acpivar.h>
     38 #include <dev/acpi/acpi_intr.h>
     39 
     40 #include <dev/sdmmc/sdhcreg.h>
     41 #include <dev/sdmmc/sdhcvar.h>
     42 #include <dev/sdmmc/sdmmcvar.h>
     43 
     44 #define _COMPONENT	ACPI_RESOURCE_COMPONENT
     45 ACPI_MODULE_NAME	("bcmemmc2_acpi")
     46 
     47 static int	bcmemmc2_acpi_match(device_t, cfdata_t, void *);
     48 static void	bcmemmc2_acpi_attach(device_t, device_t, void *);
     49 static void	bcmemmc2_acpi_attach1(device_t);
     50 
     51 static const char * const compatible[] = {
     52 	"BRCME88C",
     53 	NULL
     54 };
     55 
     56 struct bcmemmc2_acpi_softc {
     57 	struct sdhc_softc sc;
     58 	bus_space_tag_t sc_memt;
     59 	bus_space_handle_t sc_memh;
     60 	bus_size_t sc_memsize;
     61 	void *sc_ih;
     62 	struct sdhc_host *sc_hosts[1];
     63 };
     64 
     65 CFATTACH_DECL_NEW(bcmemmc2_acpi, sizeof(struct bcmemmc2_acpi_softc),
     66     bcmemmc2_acpi_match, bcmemmc2_acpi_attach, NULL, NULL);
     67 
     68 static int
     69 bcmemmc2_acpi_match(device_t parent, cfdata_t match, void *opaque)
     70 {
     71 	struct acpi_attach_args *aa = opaque;
     72 
     73 	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
     74 		return 0;
     75 
     76 	return acpi_match_hid(aa->aa_node->ad_devinfo, compatible);
     77 }
     78 
     79 static void
     80 bcmemmc2_acpi_attach(device_t parent, device_t self, void *opaque)
     81 {
     82 	struct bcmemmc2_acpi_softc *sc = device_private(self);
     83 	struct acpi_attach_args *aa = opaque;
     84 	struct acpi_resources res;
     85 	struct acpi_mem *mem;
     86 	struct acpi_irq *irq;
     87 	ACPI_STATUS rv;
     88 
     89 	sc->sc.sc_dev = self;
     90 	sc->sc.sc_dmat = aa->aa_dmat;
     91 	sc->sc.sc_host = sc->sc_hosts;
     92 	sc->sc_memt = aa->aa_memt;
     93 
     94 	rv = acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS",
     95 	    &res, &acpi_resource_parse_ops_default);
     96 	if (ACPI_FAILURE(rv))
     97 		return;
     98 
     99 	mem = acpi_res_mem(&res, 0);
    100 	irq = acpi_res_irq(&res, 0);
    101 	if (mem == NULL || irq == NULL) {
    102 		aprint_error_dev(self, "incomplete resources\n");
    103 		goto cleanup;
    104 	}
    105 	if (mem->ar_length == 0) {
    106 		aprint_error_dev(self, "zero length memory resource\n");
    107 		goto cleanup;
    108 	}
    109 	sc->sc_memsize = mem->ar_length;
    110 
    111 	if (bus_space_map(sc->sc_memt, mem->ar_base, sc->sc_memsize, 0,
    112 	    &sc->sc_memh)) {
    113 		aprint_error_dev(self, "couldn't map registers\n");
    114 		goto cleanup;
    115 	}
    116 
    117 	/*
    118 	 * The controller doesn't honour standard SDHCI voltage registers, so
    119 	 * disable UHS modes.
    120 	 */
    121 	sc->sc.sc_flags = SDHC_FLAG_32BIT_ACCESS |
    122 #if notyet
    123 			  SDHC_FLAG_USE_DMA |
    124 #endif
    125 			  SDHC_FLAG_NO_1_8_V;
    126 
    127 	sc->sc_ih = acpi_intr_establish(self,
    128 	    (uint64_t)(uintptr_t)aa->aa_node->ad_handle,
    129 	    IPL_BIO, true, sdhc_intr, &sc->sc, device_xname(self));
    130 	if (sc->sc_ih == NULL) {
    131 		aprint_error_dev(self,
    132 		    "couldn't establish interrupt handler\n");
    133 		goto unmap;
    134 	}
    135 
    136 	config_defer(self, bcmemmc2_acpi_attach1);
    137 
    138 	acpi_resource_cleanup(&res);
    139 	return;
    140 
    141 unmap:
    142 	bus_space_unmap(sc->sc_memt, sc->sc_memh, sc->sc_memsize);
    143 	sc->sc_memsize = 0;
    144 cleanup:
    145 	acpi_resource_cleanup(&res);
    146 }
    147 
    148 static void
    149 bcmemmc2_acpi_attach1(device_t self)
    150 {
    151 	struct bcmemmc2_acpi_softc *sc = device_private(self);
    152 
    153 	if (sdhc_host_found(&sc->sc, sc->sc_memt, sc->sc_memh,
    154 	    sc->sc_memsize) != 0) {
    155 		aprint_error_dev(self, "couldn't initialize host\n");
    156 		goto fail;
    157 	}
    158 
    159 	return;
    160 
    161 fail:
    162 	if (sc->sc_ih != NULL)
    163 		acpi_intr_disestablish(sc->sc_ih);
    164 	sc->sc_ih = NULL;
    165 }
    166