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genet_acpi.c revision 1.3 
      1 /* $NetBSD: genet_acpi.c,v 1.3 2020/12/07 10:02:51 jmcneill Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2020 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 "opt_net_mpsafe.h"
     30 
     31 #include <sys/cdefs.h>
     32 __KERNEL_RCSID(0, "$NetBSD: genet_acpi.c,v 1.3 2020/12/07 10:02:51 jmcneill Exp $");
     33 
     34 #include <sys/param.h>
     35 #include <sys/bus.h>
     36 #include <sys/cpu.h>
     37 #include <sys/device.h>
     38 
     39 #include <net/if.h>
     40 #include <net/if_dl.h>
     41 #include <net/if_ether.h>
     42 #include <net/if_media.h>
     43 
     44 #include <dev/mii/miivar.h>
     45 
     46 #include <dev/ic/bcmgenetvar.h>
     47 
     48 #include <dev/acpi/acpireg.h>
     49 #include <dev/acpi/acpivar.h>
     50 #include <dev/acpi/acpi_intr.h>
     51 
     52 #ifdef NET_MPSAFE
     53 #define	GENET_INTR_MPSAFE	true
     54 #else
     55 #define	GENET_INTR_MPSAFE	false
     56 #endif
     57 
     58 static const char * const compatible[] = {
     59 	"BCM6E4E",	/* Broadcom GENET v5 */
     60 	NULL
     61 };
     62 
     63 static int	genet_acpi_match(device_t, cfdata_t, void *);
     64 static void	genet_acpi_attach(device_t, device_t, void *);
     65 
     66 CFATTACH_DECL_NEW(genet_acpi, sizeof(struct genet_softc),
     67     genet_acpi_match, genet_acpi_attach, NULL, NULL);
     68 
     69 static int
     70 genet_acpi_match(device_t parent, cfdata_t cf, void *aux)
     71 {
     72 	struct acpi_attach_args *aa = aux;
     73 
     74 	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
     75 		return 0;
     76 
     77 	return acpi_match_hid(aa->aa_node->ad_devinfo, compatible);
     78 }
     79 
     80 static void
     81 genet_acpi_attach(device_t parent, device_t self, void *aux)
     82 {
     83 	struct genet_softc * const sc = device_private(self);
     84 	struct acpi_attach_args *aa = aux;
     85 	ACPI_HANDLE handle = aa->aa_node->ad_handle;
     86 	struct acpi_resources res;
     87 	struct acpi_mem *mem;
     88 	struct acpi_irq *irq;
     89 	char *phy_mode;
     90 	ACPI_STATUS rv;
     91 	int error;
     92 	void *ih;
     93 
     94 	sc->sc_dev = self;
     95 
     96 	rv = acpi_resource_parse(sc->sc_dev, handle, "_CRS",
     97 	    &res, &acpi_resource_parse_ops_default);
     98 	if (ACPI_FAILURE(rv))
     99 		return;
    100 
    101 	mem = acpi_res_mem(&res, 0);
    102 	if (mem == NULL) {
    103 		aprint_error_dev(self, "couldn't find mem resource\n");
    104 		goto done;
    105 	}
    106 
    107 	irq = acpi_res_irq(&res, 0);
    108 	if (irq == NULL) {
    109 		aprint_error_dev(self, "couldn't find irq resource\n");
    110 		goto done;
    111 	}
    112 
    113 	sc->sc_bst = aa->aa_memt;
    114 	error = bus_space_map(sc->sc_bst, mem->ar_base, mem->ar_length,
    115 	    0, &sc->sc_bsh);
    116 	if (error != 0) {
    117 		aprint_error_dev(self, "couldn't map registers\n");
    118 		goto done;
    119 	}
    120 	sc->sc_dmat = BUS_DMA_TAG_VALID(aa->aa_dmat64) ?
    121 	    aa->aa_dmat64 : aa->aa_dmat;
    122 	sc->sc_phy_id = MII_PHY_ANY;
    123 
    124 	rv = acpi_dsd_string(handle, "phy-mode", &phy_mode);
    125 	if (ACPI_FAILURE(rv)) {
    126 		aprint_error_dev(self, "missing 'phy-mode' property\n");
    127 		goto done;
    128 	}
    129 
    130 	if (strcmp(phy_mode, "rgmii-rxid") == 0)
    131 		sc->sc_phy_mode = GENET_PHY_MODE_RGMII_RXID;
    132 	else if (strcmp(phy_mode, "rgmii-txid") == 0)
    133 		sc->sc_phy_mode = GENET_PHY_MODE_RGMII_TXID;
    134 	else if (strcmp(phy_mode, "rgmii-id") == 0)
    135 		sc->sc_phy_mode = GENET_PHY_MODE_RGMII_ID;
    136 	else if (strcmp(phy_mode, "rgmii") == 0)
    137 		sc->sc_phy_mode = GENET_PHY_MODE_RGMII;
    138 	else {
    139 		aprint_error(": unsupported phy-mode '%s'\n", phy_mode);
    140 		goto done;
    141 	}
    142 
    143 	aprint_normal("%s", device_xname(self));
    144 	if (genet_attach(sc) != 0)
    145 		goto done;
    146 
    147         ih = acpi_intr_establish(self, (uint64_t)(uintptr_t)handle, IPL_NET,
    148 	    GENET_INTR_MPSAFE, genet_intr, sc, device_xname(self));
    149 	if (ih == NULL) {
    150 		aprint_error_dev(self, "couldn't establish interrupt\n");
    151 		goto done;
    152 	}
    153 
    154 done:
    155 	acpi_resource_cleanup(&res);
    156 }
    157