| 1 | /* $NetBSD: hpet_acpi.c,v 1.11 2011/06/15 09:02:38 jruoho Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2011 Jukka Ruohonen |
| 5 | * Copyright (c) 2006 Nicolas Joly |
| 6 | * All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. The name of the author may not be used to endorse or promote products |
| 17 | * derived from this software without specific prior written permission. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS |
| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 29 | * POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | #include <sys/cdefs.h> |
| 32 | __KERNEL_RCSID(0, "$NetBSD: hpet_acpi.c,v 1.11 2011/06/15 09:02:38 jruoho Exp $" ); |
| 33 | |
| 34 | #include <sys/param.h> |
| 35 | #include <sys/device.h> |
| 36 | #include <sys/time.h> |
| 37 | #include <sys/timetc.h> |
| 38 | |
| 39 | #include <dev/acpi/acpivar.h> |
| 40 | |
| 41 | #include <dev/ic/hpetreg.h> |
| 42 | #include <dev/ic/hpetvar.h> |
| 43 | |
| 44 | #define _COMPONENT ACPI_RESOURCE_COMPONENT |
| 45 | ACPI_MODULE_NAME ("acpi_hpet" ) |
| 46 | |
| 47 | static int hpet_acpi_tab_match(device_t, cfdata_t, void *); |
| 48 | static void hpet_acpi_tab_attach(device_t, device_t, void *); |
| 49 | static bus_addr_t hpet_acpi_tab_addr(void); |
| 50 | static int hpet_acpi_dev_match(device_t, cfdata_t, void *); |
| 51 | static void hpet_acpi_dev_attach(device_t, device_t, void *); |
| 52 | static bus_addr_t hpet_acpi_dev_addr(device_t, void *, bus_size_t *); |
| 53 | static int hpet_acpi_detach(device_t, int); |
| 54 | |
| 55 | static const char * const hpet_acpi_ids[] = { |
| 56 | "PNP0103" , |
| 57 | NULL |
| 58 | }; |
| 59 | |
| 60 | CFATTACH_DECL_NEW(hpet_acpi_tab, sizeof(struct hpet_softc), |
| 61 | hpet_acpi_tab_match, hpet_acpi_tab_attach, hpet_acpi_detach, NULL); |
| 62 | |
| 63 | CFATTACH_DECL_NEW(hpet_acpi_dev, sizeof(struct hpet_softc), |
| 64 | hpet_acpi_dev_match, hpet_acpi_dev_attach, hpet_acpi_detach, NULL); |
| 65 | |
| 66 | static int |
| 67 | hpet_acpi_tab_match(device_t parent, cfdata_t match, void *aux) |
| 68 | { |
| 69 | struct acpi_attach_args *aa = aux; |
| 70 | bus_space_handle_t bh; |
| 71 | bus_space_tag_t bt; |
| 72 | bus_addr_t addr; |
| 73 | |
| 74 | addr = hpet_acpi_tab_addr(); |
| 75 | |
| 76 | if (addr == 0) |
| 77 | return 0; |
| 78 | |
| 79 | bt = aa->aa_memt; |
| 80 | |
| 81 | if (bus_space_map(bt, addr, HPET_WINDOW_SIZE, 0, &bh) != 0) |
| 82 | return 0; |
| 83 | |
| 84 | bus_space_unmap(bt, bh, HPET_WINDOW_SIZE); |
| 85 | |
| 86 | return 1; |
| 87 | } |
| 88 | |
| 89 | static void |
| 90 | hpet_acpi_tab_attach(device_t parent, device_t self, void *aux) |
| 91 | { |
| 92 | struct hpet_softc *sc = device_private(self); |
| 93 | struct acpi_attach_args *aa = aux; |
| 94 | bus_addr_t addr; |
| 95 | |
| 96 | sc->sc_mapped = false; |
| 97 | addr = hpet_acpi_tab_addr(); |
| 98 | |
| 99 | if (addr == 0) { |
| 100 | aprint_error(": failed to get address\n" ); |
| 101 | return; |
| 102 | } |
| 103 | |
| 104 | sc->sc_memt = aa->aa_memt; |
| 105 | sc->sc_mems = HPET_WINDOW_SIZE; |
| 106 | |
| 107 | if (bus_space_map(sc->sc_memt, addr, sc->sc_mems, 0, &sc->sc_memh)) { |
| 108 | aprint_error(": failed to map mem space\n" ); |
| 109 | return; |
| 110 | } |
| 111 | |
| 112 | aprint_naive("\n" ); |
| 113 | aprint_normal(": high precision event timer (mem 0x%08x-0x%08x)\n" , |
| 114 | (uint32_t)addr, (uint32_t)addr + HPET_WINDOW_SIZE); |
| 115 | |
| 116 | sc->sc_mapped = true; |
| 117 | hpet_attach_subr(self); |
| 118 | } |
| 119 | |
| 120 | static bus_addr_t |
| 121 | hpet_acpi_tab_addr(void) |
| 122 | { |
| 123 | ACPI_TABLE_HPET *hpet; |
| 124 | ACPI_STATUS rv; |
| 125 | |
| 126 | rv = AcpiGetTable(ACPI_SIG_HPET, 1, (ACPI_TABLE_HEADER **)&hpet); |
| 127 | |
| 128 | if (ACPI_FAILURE(rv)) |
| 129 | return 0; |
| 130 | |
| 131 | if (hpet->Address.Address == 0) |
| 132 | return 0; |
| 133 | |
| 134 | if (hpet->Address.SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
| 135 | return 0; |
| 136 | |
| 137 | if (hpet->Address.Address == 0xfed0000000000000UL) /* A quirk. */ |
| 138 | hpet->Address.Address >>= 32; |
| 139 | |
| 140 | return hpet->Address.Address; |
| 141 | } |
| 142 | |
| 143 | static int |
| 144 | hpet_acpi_dev_match(device_t parent, cfdata_t match, void *aux) |
| 145 | { |
| 146 | struct acpi_attach_args *aa = aux; |
| 147 | bus_space_handle_t bh; |
| 148 | bus_space_tag_t bt; |
| 149 | bus_size_t len = 0; |
| 150 | bus_addr_t addr; |
| 151 | |
| 152 | if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) |
| 153 | return 0; |
| 154 | |
| 155 | if (acpi_match_hid(aa->aa_node->ad_devinfo, hpet_acpi_ids) == 0) |
| 156 | return 0; |
| 157 | |
| 158 | addr = hpet_acpi_dev_addr(parent, aa, &len); |
| 159 | |
| 160 | if (addr == 0 || len == 0) |
| 161 | return 0; |
| 162 | |
| 163 | bt = aa->aa_memt; |
| 164 | |
| 165 | if (bus_space_map(bt, addr, len, 0, &bh) == 0) { |
| 166 | bus_space_unmap(bt, bh, len); |
| 167 | return 1; |
| 168 | } |
| 169 | |
| 170 | return 0; |
| 171 | } |
| 172 | |
| 173 | static void |
| 174 | hpet_acpi_dev_attach(device_t parent, device_t self, void *aux) |
| 175 | { |
| 176 | struct hpet_softc *sc = device_private(self); |
| 177 | struct acpi_attach_args *aa = aux; |
| 178 | bus_addr_t addr; |
| 179 | |
| 180 | sc->sc_mapped = false; |
| 181 | addr = hpet_acpi_dev_addr(self, aa, &sc->sc_mems); |
| 182 | |
| 183 | if (addr == 0) { |
| 184 | aprint_error(": failed to get address\n" ); |
| 185 | return; |
| 186 | } |
| 187 | |
| 188 | sc->sc_memt = aa->aa_memt; |
| 189 | |
| 190 | if (bus_space_map(sc->sc_memt, addr, sc->sc_mems, 0, &sc->sc_memh)) { |
| 191 | aprint_error(": failed to map mem space\n" ); |
| 192 | return; |
| 193 | } |
| 194 | |
| 195 | aprint_naive("\n" ); |
| 196 | aprint_normal(": high precision event timer (mem 0x%08x-0x%08x)\n" , |
| 197 | (uint32_t)addr, (uint32_t)(addr + sc->sc_mems)); |
| 198 | |
| 199 | sc->sc_mapped = true; |
| 200 | hpet_attach_subr(self); |
| 201 | } |
| 202 | |
| 203 | static bus_addr_t |
| 204 | hpet_acpi_dev_addr(device_t self, void *aux, bus_size_t *len) |
| 205 | { |
| 206 | struct acpi_attach_args *aa = aux; |
| 207 | struct acpi_resources res; |
| 208 | struct acpi_mem *mem; |
| 209 | bus_addr_t addr = 0; |
| 210 | ACPI_STATUS rv; |
| 211 | |
| 212 | rv = acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS" , |
| 213 | &res, &acpi_resource_parse_ops_quiet); |
| 214 | |
| 215 | if (ACPI_FAILURE(rv)) |
| 216 | return 0; |
| 217 | |
| 218 | mem = acpi_res_mem(&res, 0); |
| 219 | |
| 220 | if (mem == NULL) |
| 221 | goto out; |
| 222 | |
| 223 | if (mem->ar_length < HPET_WINDOW_SIZE) |
| 224 | goto out; |
| 225 | |
| 226 | addr = mem->ar_base; |
| 227 | *len = mem->ar_length; |
| 228 | |
| 229 | out: |
| 230 | acpi_resource_cleanup(&res); |
| 231 | |
| 232 | return addr; |
| 233 | } |
| 234 | |
| 235 | static int |
| 236 | hpet_acpi_detach(device_t self, int flags) |
| 237 | { |
| 238 | struct hpet_softc *sc = device_private(self); |
| 239 | int rv; |
| 240 | |
| 241 | if (sc->sc_mapped != true) |
| 242 | return 0; |
| 243 | |
| 244 | rv = hpet_detach(self, flags); |
| 245 | |
| 246 | if (rv != 0) |
| 247 | return rv; |
| 248 | |
| 249 | bus_space_unmap(sc->sc_memt, sc->sc_memh, sc->sc_mems); |
| 250 | |
| 251 | return 0; |
| 252 | } |
| 253 | |