dwiic_acpi.c revision 1.1.2.2
1 1.1.2.2 pgoyette /* $NetBSD: dwiic_acpi.c,v 1.1.2.2 2018/10/20 06:58:30 pgoyette Exp $ */ 2 1.1.2.2 pgoyette 3 1.1.2.2 pgoyette /*- 4 1.1.2.2 pgoyette * Copyright (c) 2018 The NetBSD Foundation, Inc. 5 1.1.2.2 pgoyette * All rights reserved. 6 1.1.2.2 pgoyette * 7 1.1.2.2 pgoyette * This code is derived from software contributed to The NetBSD Foundation 8 1.1.2.2 pgoyette * by Jared McNeill <jmcneill (at) invisible.ca>. 9 1.1.2.2 pgoyette * 10 1.1.2.2 pgoyette * Redistribution and use in source and binary forms, with or without 11 1.1.2.2 pgoyette * modification, are permitted provided that the following conditions 12 1.1.2.2 pgoyette * are met: 13 1.1.2.2 pgoyette * 1. Redistributions of source code must retain the above copyright 14 1.1.2.2 pgoyette * notice, this list of conditions and the following disclaimer. 15 1.1.2.2 pgoyette * 2. Redistributions in binary form must reproduce the above copyright 16 1.1.2.2 pgoyette * notice, this list of conditions and the following disclaimer in the 17 1.1.2.2 pgoyette * documentation and/or other materials provided with the distribution. 18 1.1.2.2 pgoyette * 19 1.1.2.2 pgoyette * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.1.2.2 pgoyette * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.1.2.2 pgoyette * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.1.2.2 pgoyette * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.1.2.2 pgoyette * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.1.2.2 pgoyette * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.1.2.2 pgoyette * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.1.2.2 pgoyette * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.1.2.2 pgoyette * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.1.2.2 pgoyette * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.1.2.2 pgoyette * POSSIBILITY OF SUCH DAMAGE. 30 1.1.2.2 pgoyette */ 31 1.1.2.2 pgoyette 32 1.1.2.2 pgoyette #include <sys/cdefs.h> 33 1.1.2.2 pgoyette __KERNEL_RCSID(0, "$NetBSD: dwiic_acpi.c,v 1.1.2.2 2018/10/20 06:58:30 pgoyette Exp $"); 34 1.1.2.2 pgoyette 35 1.1.2.2 pgoyette #include <sys/param.h> 36 1.1.2.2 pgoyette #include <sys/bus.h> 37 1.1.2.2 pgoyette #include <sys/cpu.h> 38 1.1.2.2 pgoyette #include <sys/device.h> 39 1.1.2.2 pgoyette 40 1.1.2.2 pgoyette #include <dev/acpi/acpireg.h> 41 1.1.2.2 pgoyette #include <dev/acpi/acpivar.h> 42 1.1.2.2 pgoyette #include <dev/acpi/acpi_i2c.h> 43 1.1.2.2 pgoyette 44 1.1.2.2 pgoyette #include <dev/ic/dwiic_var.h> 45 1.1.2.2 pgoyette 46 1.1.2.2 pgoyette struct dwiic_acpi_param { 47 1.1.2.2 pgoyette uint16_t hcnt; 48 1.1.2.2 pgoyette uint16_t lcnt; 49 1.1.2.2 pgoyette uint32_t ht; 50 1.1.2.2 pgoyette }; 51 1.1.2.2 pgoyette 52 1.1.2.2 pgoyette static int dwiic_acpi_match(device_t, cfdata_t, void *); 53 1.1.2.2 pgoyette static void dwiic_acpi_attach(device_t, device_t, void *); 54 1.1.2.2 pgoyette 55 1.1.2.2 pgoyette static void dwiic_acpi_parse_param(struct dwiic_softc *, ACPI_HANDLE, 56 1.1.2.2 pgoyette const char *, struct dwiic_acpi_param *); 57 1.1.2.2 pgoyette static void dwiic_acpi_configure(struct dwiic_softc *, ACPI_HANDLE); 58 1.1.2.2 pgoyette 59 1.1.2.2 pgoyette CFATTACH_DECL_NEW(dwiic_acpi, sizeof(struct dwiic_softc), dwiic_acpi_match, dwiic_acpi_attach, NULL, NULL); 60 1.1.2.2 pgoyette 61 1.1.2.2 pgoyette static const char * const compatible[] = { 62 1.1.2.2 pgoyette "AMDI0510", 63 1.1.2.2 pgoyette NULL 64 1.1.2.2 pgoyette }; 65 1.1.2.2 pgoyette 66 1.1.2.2 pgoyette static int 67 1.1.2.2 pgoyette dwiic_acpi_match(device_t parent, cfdata_t cf, void *aux) 68 1.1.2.2 pgoyette { 69 1.1.2.2 pgoyette struct acpi_attach_args *aa = aux; 70 1.1.2.2 pgoyette 71 1.1.2.2 pgoyette if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 72 1.1.2.2 pgoyette return 0; 73 1.1.2.2 pgoyette 74 1.1.2.2 pgoyette return acpi_match_hid(aa->aa_node->ad_devinfo, compatible); 75 1.1.2.2 pgoyette } 76 1.1.2.2 pgoyette 77 1.1.2.2 pgoyette static void 78 1.1.2.2 pgoyette dwiic_acpi_attach(device_t parent, device_t self, void *aux) 79 1.1.2.2 pgoyette { 80 1.1.2.2 pgoyette struct dwiic_softc * const sc = device_private(self); 81 1.1.2.2 pgoyette struct acpi_attach_args *aa = aux; 82 1.1.2.2 pgoyette struct acpi_resources res; 83 1.1.2.2 pgoyette struct acpi_mem *mem; 84 1.1.2.2 pgoyette struct acpi_irq *irq; 85 1.1.2.2 pgoyette ACPI_STATUS rv; 86 1.1.2.2 pgoyette int error; 87 1.1.2.2 pgoyette void *ih; 88 1.1.2.2 pgoyette 89 1.1.2.2 pgoyette sc->sc_dev = self; 90 1.1.2.2 pgoyette sc->sc_type = dwiic_type_generic; 91 1.1.2.2 pgoyette sc->sc_iot = aa->aa_memt; 92 1.1.2.2 pgoyette 93 1.1.2.2 pgoyette rv = acpi_resource_parse(sc->sc_dev, aa->aa_node->ad_handle, "_CRS", 94 1.1.2.2 pgoyette &res, &acpi_resource_parse_ops_default); 95 1.1.2.2 pgoyette if (ACPI_FAILURE(rv)) 96 1.1.2.2 pgoyette return; 97 1.1.2.2 pgoyette 98 1.1.2.2 pgoyette mem = acpi_res_mem(&res, 0); 99 1.1.2.2 pgoyette if (mem == NULL) { 100 1.1.2.2 pgoyette aprint_error_dev(self, "couldn't find mem resource\n"); 101 1.1.2.2 pgoyette goto done; 102 1.1.2.2 pgoyette } 103 1.1.2.2 pgoyette 104 1.1.2.2 pgoyette irq = acpi_res_irq(&res, 0); 105 1.1.2.2 pgoyette if (irq == NULL) { 106 1.1.2.2 pgoyette aprint_error_dev(self, "couldn't find irq resource\n"); 107 1.1.2.2 pgoyette goto done; 108 1.1.2.2 pgoyette } 109 1.1.2.2 pgoyette 110 1.1.2.2 pgoyette error = bus_space_map(sc->sc_iot, mem->ar_base, mem->ar_length, 0, &sc->sc_ioh); 111 1.1.2.2 pgoyette if (error) { 112 1.1.2.2 pgoyette aprint_error_dev(self, "couldn't map registers\n"); 113 1.1.2.2 pgoyette return; 114 1.1.2.2 pgoyette } 115 1.1.2.2 pgoyette 116 1.1.2.2 pgoyette const int type = (irq->ar_type == ACPI_EDGE_SENSITIVE) ? IST_EDGE : IST_LEVEL; 117 1.1.2.2 pgoyette ih = intr_establish(irq->ar_irq, IPL_VM, type, dwiic_intr, sc); 118 1.1.2.2 pgoyette if (ih == NULL) { 119 1.1.2.2 pgoyette aprint_error_dev(self, "couldn't install interrupt handler\n"); 120 1.1.2.2 pgoyette bus_space_unmap(sc->sc_iot, sc->sc_ioh, mem->ar_length); 121 1.1.2.2 pgoyette goto done; 122 1.1.2.2 pgoyette } 123 1.1.2.2 pgoyette 124 1.1.2.2 pgoyette dwiic_acpi_configure(sc, aa->aa_node->ad_handle); 125 1.1.2.2 pgoyette 126 1.1.2.2 pgoyette sc->sc_iba.iba_child_devices = acpi_enter_i2c_devs(aa->aa_node); 127 1.1.2.2 pgoyette 128 1.1.2.2 pgoyette dwiic_attach(sc); 129 1.1.2.2 pgoyette 130 1.1.2.2 pgoyette config_found_ia(self, "i2cbus", &sc->sc_iba, iicbus_print); 131 1.1.2.2 pgoyette 132 1.1.2.2 pgoyette pmf_device_register(self, dwiic_suspend, dwiic_resume); 133 1.1.2.2 pgoyette 134 1.1.2.2 pgoyette done: 135 1.1.2.2 pgoyette acpi_resource_cleanup(&res); 136 1.1.2.2 pgoyette } 137 1.1.2.2 pgoyette 138 1.1.2.2 pgoyette static void 139 1.1.2.2 pgoyette dwiic_acpi_parse_param(struct dwiic_softc *sc, ACPI_HANDLE handle, const char *path, 140 1.1.2.2 pgoyette struct dwiic_acpi_param *param) 141 1.1.2.2 pgoyette { 142 1.1.2.2 pgoyette ACPI_BUFFER buf; 143 1.1.2.2 pgoyette ACPI_OBJECT *obj; 144 1.1.2.2 pgoyette 145 1.1.2.2 pgoyette memset(param, 0, sizeof(*param)); 146 1.1.2.2 pgoyette 147 1.1.2.2 pgoyette if (ACPI_FAILURE(acpi_eval_struct(handle, path, &buf))) 148 1.1.2.2 pgoyette return; 149 1.1.2.2 pgoyette 150 1.1.2.2 pgoyette obj = buf.Pointer; 151 1.1.2.2 pgoyette if (obj->Type != ACPI_TYPE_PACKAGE || obj->Package.Count != 3) 152 1.1.2.2 pgoyette goto done; 153 1.1.2.2 pgoyette 154 1.1.2.2 pgoyette param->hcnt = (uint16_t)obj->Package.Elements[0].Integer.Value; 155 1.1.2.2 pgoyette param->lcnt = (uint16_t)obj->Package.Elements[1].Integer.Value; 156 1.1.2.2 pgoyette param->ht = (uint32_t)obj->Package.Elements[2].Integer.Value; 157 1.1.2.2 pgoyette 158 1.1.2.2 pgoyette done: 159 1.1.2.2 pgoyette ACPI_FREE(buf.Pointer); 160 1.1.2.2 pgoyette } 161 1.1.2.2 pgoyette 162 1.1.2.2 pgoyette static void 163 1.1.2.2 pgoyette dwiic_acpi_configure(struct dwiic_softc *sc, ACPI_HANDLE handle) 164 1.1.2.2 pgoyette { 165 1.1.2.2 pgoyette struct dwiic_acpi_param sscn, fmcn; 166 1.1.2.2 pgoyette 167 1.1.2.2 pgoyette dwiic_acpi_parse_param(sc, handle, "SSCN", &sscn); 168 1.1.2.2 pgoyette sc->ss_hcnt = sscn.hcnt; 169 1.1.2.2 pgoyette sc->ss_lcnt = sscn.lcnt; 170 1.1.2.2 pgoyette 171 1.1.2.2 pgoyette dwiic_acpi_parse_param(sc, handle, "FMCN", &fmcn); 172 1.1.2.2 pgoyette sc->fs_hcnt = fmcn.hcnt; 173 1.1.2.2 pgoyette sc->fs_lcnt = fmcn.lcnt; 174 1.1.2.2 pgoyette 175 1.1.2.2 pgoyette /* XXX */ 176 1.1.2.2 pgoyette sc->sda_hold_time = fmcn.ht; 177 1.1.2.2 pgoyette } 178
Indexes created Wed Oct 22 13:09:56 GMT 2025