acpi_ec.c revision 1.42.2.2
1 1.42.2.2 mjf /* $NetBSD: acpi_ec.c,v 1.42.2.2 2007/12/27 00:44:53 mjf Exp $ */ 2 1.1 thorpej 3 1.1 thorpej /*- 4 1.42.2.2 mjf * Copyright (c) 2007 Joerg Sonnenberger <joerg (at) NetBSD.org>. 5 1.1 thorpej * All rights reserved. 6 1.1 thorpej * 7 1.1 thorpej * Redistribution and use in source and binary forms, with or without 8 1.1 thorpej * modification, are permitted provided that the following conditions 9 1.1 thorpej * are met: 10 1.42.2.2 mjf * 11 1.1 thorpej * 1. Redistributions of source code must retain the above copyright 12 1.1 thorpej * notice, this list of conditions and the following disclaimer. 13 1.1 thorpej * 2. Redistributions in binary form must reproduce the above copyright 14 1.42.2.2 mjf * notice, this list of conditions and the following disclaimer in 15 1.42.2.2 mjf * the documentation and/or other materials provided with the 16 1.42.2.2 mjf * distribution. 17 1.42.2.2 mjf * 18 1.42.2.2 mjf * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 1.42.2.2 mjf * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 1.42.2.2 mjf * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 21 1.42.2.2 mjf * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 22 1.42.2.2 mjf * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 23 1.42.2.2 mjf * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 24 1.42.2.2 mjf * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 25 1.42.2.2 mjf * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 26 1.42.2.2 mjf * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 27 1.42.2.2 mjf * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 28 1.42.2.2 mjf * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 1.1 thorpej * SUCH DAMAGE. 30 1.1 thorpej */ 31 1.1 thorpej 32 1.42.2.2 mjf /* 33 1.42.2.2 mjf * The ACPI Embedded Controller (EC) driver serves two different purposes: 34 1.42.2.2 mjf * - read and write access from ASL, e.g. to read battery state 35 1.42.2.2 mjf * - notification of ASL of System Control Interrupts. 36 1.42.2.2 mjf * 37 1.42.2.2 mjf * Access to the EC is serialised by sc_access_mtx and optionally the 38 1.42.2.2 mjf * ACPI global mutex. Both locks are held until the request is fulfilled. 39 1.42.2.2 mjf * All access to the softc has to hold sc_mtx to serialise against the GPE 40 1.42.2.2 mjf * handler and the callout. sc_mtx is also used for wakeup conditions. 41 1.42.2.2 mjf * 42 1.42.2.2 mjf * SCIs are processed in a kernel thread. Handling gets a bit complicated 43 1.42.2.2 mjf * by the lock order (sc_mtx must be acquired after sc_access_mtx and the 44 1.42.2.2 mjf * ACPI global mutex). 45 1.42.2.2 mjf * 46 1.42.2.2 mjf * Read and write requests spin around for a short time as many requests 47 1.42.2.2 mjf * can be handled instantly by the EC. During normal processing interrupt 48 1.42.2.2 mjf * mode is used exclusively. At boot and resume time interrupts are not 49 1.42.2.2 mjf * working and the handlers just busy loop. 50 1.42.2.2 mjf * 51 1.42.2.2 mjf * A callout is scheduled to compensate for missing interrupts on some 52 1.42.2.2 mjf * hardware. If the EC doesn't process a request for 5s, it is most likely 53 1.42.2.2 mjf * in a wedged state. No method to reset the EC is currently known. 54 1.42.2.2 mjf * 55 1.42.2.2 mjf * Special care has to be taken to not poll the EC in a busy loop without 56 1.42.2.2 mjf * delay. This can prevent processing of Power Button events. At least some 57 1.42.2.2 mjf * Lenovo Thinkpads seem to be implement the Power Button Override in the EC 58 1.42.2.2 mjf * and the only option to recover on those models is to cut off all power. 59 1.42.2.2 mjf */ 60 1.3 lukem 61 1.3 lukem #include <sys/cdefs.h> 62 1.42.2.2 mjf __KERNEL_RCSID(0, "$NetBSD: acpi_ec.c,v 1.42.2.2 2007/12/27 00:44:53 mjf Exp $"); 63 1.1 thorpej 64 1.1 thorpej #include <sys/param.h> 65 1.1 thorpej #include <sys/systm.h> 66 1.42.2.2 mjf #include <sys/condvar.h> 67 1.1 thorpej #include <sys/device.h> 68 1.1 thorpej #include <sys/kernel.h> 69 1.42.2.2 mjf #include <sys/kthread.h> 70 1.42.2.2 mjf #include <sys/mutex.h> 71 1.1 thorpej 72 1.42 ad #include <sys/bus.h> 73 1.1 thorpej 74 1.1 thorpej #include <dev/acpi/acpivar.h> 75 1.42.2.2 mjf #include <dev/acpi/acpi_ecvar.h> 76 1.1 thorpej 77 1.42.2.2 mjf /* Maximum time to wait for global ACPI lock in ms */ 78 1.42.2.2 mjf #define EC_LOCK_TIMEOUT 5 79 1.23 kochi 80 1.42.2.2 mjf /* Maximum time to poll for completion of a command in ms */ 81 1.42.2.2 mjf #define EC_POLL_TIMEOUT 5 82 1.1 thorpej 83 1.42.2.2 mjf /* Maximum time to give a single EC command in s */ 84 1.42.2.2 mjf #define EC_CMD_TIMEOUT 10 85 1.42.2.2 mjf 86 1.42.2.2 mjf /* From ACPI 3.0b, chapter 12.3 */ 87 1.42.2.2 mjf #define EC_COMMAND_READ 0x80 88 1.42.2.2 mjf #define EC_COMMAND_WRITE 0x81 89 1.42.2.2 mjf #define EC_COMMAND_BURST_EN 0x82 90 1.42.2.2 mjf #define EC_COMMAND_BURST_DIS 0x83 91 1.42.2.2 mjf #define EC_COMMAND_QUERY 0x84 92 1.42.2.2 mjf 93 1.42.2.2 mjf /* From ACPI 3.0b, chapter 12.2.1 */ 94 1.42.2.2 mjf #define EC_STATUS_OBF 0x01 95 1.42.2.2 mjf #define EC_STATUS_IBF 0x02 96 1.42.2.2 mjf #define EC_STATUS_CMD 0x08 97 1.42.2.2 mjf #define EC_STATUS_BURST 0x10 98 1.42.2.2 mjf #define EC_STATUS_SCI 0x20 99 1.42.2.2 mjf #define EC_STATUS_SMI 0x40 100 1.1 thorpej 101 1.42.2.2 mjf static const char *ec_hid[] = { 102 1.42.2.2 mjf "PNP0C09", 103 1.42.2.2 mjf NULL, 104 1.42.2.2 mjf }; 105 1.1 thorpej 106 1.42.2.2 mjf enum ec_state_t { 107 1.42.2.2 mjf EC_STATE_QUERY, 108 1.42.2.2 mjf EC_STATE_QUERY_VAL, 109 1.42.2.2 mjf EC_STATE_READ, 110 1.42.2.2 mjf EC_STATE_READ_ADDR, 111 1.42.2.2 mjf EC_STATE_READ_VAL, 112 1.42.2.2 mjf EC_STATE_WRITE, 113 1.42.2.2 mjf EC_STATE_WRITE_ADDR, 114 1.42.2.2 mjf EC_STATE_WRITE_VAL, 115 1.42.2.2 mjf EC_STATE_FREE 116 1.42.2.2 mjf }; 117 1.1 thorpej 118 1.42.2.2 mjf struct acpiec_softc { 119 1.42.2.2 mjf ACPI_HANDLE sc_ech; 120 1.1 thorpej 121 1.42.2.2 mjf ACPI_HANDLE sc_gpeh; 122 1.42.2.2 mjf UINT8 sc_gpebit; 123 1.1 thorpej 124 1.42.2.2 mjf bus_space_tag_t sc_data_st; 125 1.42.2.2 mjf bus_space_handle_t sc_data_sh; 126 1.17 mycroft 127 1.42.2.2 mjf bus_space_tag_t sc_csr_st; 128 1.42.2.2 mjf bus_space_handle_t sc_csr_sh; 129 1.1 thorpej 130 1.42.2.2 mjf bool sc_need_global_lock; 131 1.42.2.2 mjf UINT32 sc_global_lock; 132 1.42.2.2 mjf 133 1.42.2.2 mjf kmutex_t sc_mtx, sc_access_mtx; 134 1.42.2.2 mjf kcondvar_t sc_cv, sc_cv_sci; 135 1.42.2.2 mjf enum ec_state_t sc_state; 136 1.42.2.2 mjf bool sc_got_sci; 137 1.42.2.2 mjf callout_t sc_pseudo_intr; 138 1.42.2.2 mjf 139 1.42.2.2 mjf uint8_t sc_cur_addr, sc_cur_val; 140 1.16 kochi }; 141 1.16 kochi 142 1.42.2.2 mjf static int acpiecdt_match(device_t, struct cfdata *, void *); 143 1.42.2.2 mjf static void acpiecdt_attach(device_t, device_t, void *); 144 1.1 thorpej 145 1.42.2.2 mjf static int acpiec_match(device_t, struct cfdata *, void *); 146 1.42.2.2 mjf static void acpiec_attach(device_t, device_t, void *); 147 1.17 mycroft 148 1.42.2.2 mjf static void acpiec_common_attach(device_t, device_t, ACPI_HANDLE, 149 1.42.2.2 mjf bus_addr_t, bus_addr_t, ACPI_HANDLE, uint8_t); 150 1.20 yamt 151 1.42.2.2 mjf static bool acpiec_resume(device_t); 152 1.42.2.2 mjf static bool acpiec_suspend(device_t); 153 1.20 yamt 154 1.42.2.2 mjf static bool acpiec_parse_gpe_package(device_t, ACPI_HANDLE, 155 1.42.2.2 mjf ACPI_HANDLE *, uint8_t *); 156 1.20 yamt 157 1.42.2.2 mjf static void acpiec_callout(void *); 158 1.42.2.2 mjf static void acpiec_gpe_query(void *); 159 1.42.2.2 mjf static UINT32 acpiec_gpe_handler(void *); 160 1.42.2.2 mjf static ACPI_STATUS acpiec_space_setup(ACPI_HANDLE, UINT32, void *, void **); 161 1.42.2.2 mjf static ACPI_STATUS acpiec_space_handler(UINT32, ACPI_PHYSICAL_ADDRESS, 162 1.42.2.2 mjf UINT32, ACPI_INTEGER *, void *, void *); 163 1.20 yamt 164 1.42.2.2 mjf static void acpiec_gpe_state_machine(device_t); 165 1.23 kochi 166 1.42.2.2 mjf CFATTACH_DECL_NEW(acpiec, sizeof(struct acpiec_softc), 167 1.42.2.2 mjf acpiec_match, acpiec_attach, NULL, NULL); 168 1.24 kochi 169 1.42.2.2 mjf CFATTACH_DECL_NEW(acpiecdt, sizeof(struct acpiec_softc), 170 1.42.2.2 mjf acpiecdt_match, acpiecdt_attach, NULL, NULL); 171 1.4 thorpej 172 1.42.2.2 mjf static device_t ec_singleton = NULL; 173 1.42.2.2 mjf static bool acpiec_cold = false; 174 1.42.2.2 mjf 175 1.42.2.2 mjf static bool 176 1.42.2.2 mjf acpiecdt_find(device_t parent, ACPI_HANDLE *ec_handle, 177 1.42.2.2 mjf bus_addr_t *cmd_reg, bus_addr_t *data_reg, uint8_t *gpebit) 178 1.1 thorpej { 179 1.42.2.2 mjf ACPI_TABLE_ECDT *ecdt; 180 1.25 kochi ACPI_STATUS rv; 181 1.1 thorpej 182 1.42.2.2 mjf rv = AcpiGetTable(ACPI_SIG_ECDT, 1, (ACPI_TABLE_HEADER **)&ecdt); 183 1.42.2.2 mjf if (ACPI_FAILURE(rv)) 184 1.42.2.2 mjf return false; 185 1.42.2.2 mjf 186 1.42.2.2 mjf if (ecdt->Control.BitWidth != 8 || ecdt->Data.BitWidth != 8) { 187 1.42.2.2 mjf aprint_error_dev(parent, 188 1.42.2.2 mjf "ECDT register width invalid (%d/%d)\n", 189 1.42.2.2 mjf ecdt->Control.BitWidth, ecdt->Data.BitWidth); 190 1.42.2.2 mjf return false; 191 1.17 mycroft } 192 1.20 yamt 193 1.42.2.2 mjf rv = AcpiGetHandle(ACPI_ROOT_OBJECT, ecdt->Id, ec_handle); 194 1.42.2.2 mjf if (ACPI_FAILURE(rv)) { 195 1.42.2.2 mjf aprint_error_dev(parent, 196 1.42.2.2 mjf "failed to look up EC object %s: %s\n", 197 1.42.2.2 mjf ecdt->Id, AcpiFormatException(rv)); 198 1.42.2.2 mjf return false; 199 1.42.2.2 mjf } 200 1.42.2.2 mjf 201 1.42.2.2 mjf *cmd_reg = ecdt->Control.Address; 202 1.42.2.2 mjf *data_reg = ecdt->Data.Address; 203 1.42.2.2 mjf *gpebit = ecdt->Gpe; 204 1.42.2.2 mjf 205 1.42.2.2 mjf return true; 206 1.1 thorpej } 207 1.1 thorpej 208 1.42.2.2 mjf static int 209 1.42.2.2 mjf acpiecdt_match(device_t parent, struct cfdata *match, void *aux) 210 1.1 thorpej { 211 1.42.2.2 mjf ACPI_HANDLE ec_handle; 212 1.42.2.2 mjf bus_addr_t cmd_reg, data_reg; 213 1.42.2.2 mjf uint8_t gpebit; 214 1.20 yamt 215 1.42.2.2 mjf if (acpiecdt_find(parent, &ec_handle, &cmd_reg, &data_reg, &gpebit)) 216 1.42.2.2 mjf return 1; 217 1.42.2.2 mjf else 218 1.42.2.2 mjf return 0; 219 1.42.2.2 mjf } 220 1.42.2.2 mjf 221 1.42.2.2 mjf static void 222 1.42.2.2 mjf acpiecdt_attach(device_t parent, device_t self, void *aux) 223 1.42.2.2 mjf { 224 1.42.2.2 mjf ACPI_HANDLE ec_handle; 225 1.42.2.2 mjf bus_addr_t cmd_reg, data_reg; 226 1.42.2.2 mjf uint8_t gpebit; 227 1.42.2.2 mjf 228 1.42.2.2 mjf if (!acpiecdt_find(parent, &ec_handle, &cmd_reg, &data_reg, &gpebit)) 229 1.42.2.2 mjf panic("ECDT disappeared"); 230 1.42.2.2 mjf 231 1.42.2.2 mjf aprint_naive(": ACPI Embedded Controller via ECDT\n"); 232 1.42.2.2 mjf aprint_normal(": ACPI Embedded Controller via ECDT\n"); 233 1.42.2.2 mjf 234 1.42.2.2 mjf acpiec_common_attach(parent, self, ec_handle, cmd_reg, data_reg, 235 1.42.2.2 mjf NULL, gpebit); 236 1.1 thorpej } 237 1.1 thorpej 238 1.31 kochi static int 239 1.42.2.2 mjf acpiec_match(device_t parent, struct cfdata *match, void *aux) 240 1.1 thorpej { 241 1.1 thorpej struct acpi_attach_args *aa = aux; 242 1.1 thorpej 243 1.1 thorpej if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 244 1.25 kochi return 0; 245 1.1 thorpej 246 1.25 kochi return acpi_match_hid(aa->aa_node->ad_devinfo, ec_hid); 247 1.1 thorpej } 248 1.1 thorpej 249 1.42.2.2 mjf static void 250 1.42.2.2 mjf acpiec_attach(device_t parent, device_t self, void *aux) 251 1.17 mycroft { 252 1.42.2.2 mjf struct acpi_attach_args *aa = aux; 253 1.42.2.2 mjf struct acpi_resources ec_res; 254 1.42.2.2 mjf struct acpi_io *io0, *io1; 255 1.42.2.2 mjf ACPI_HANDLE gpe_handle; 256 1.42.2.2 mjf uint8_t gpebit; 257 1.23 kochi ACPI_STATUS rv; 258 1.17 mycroft 259 1.42.2.2 mjf if (ec_singleton != NULL) { 260 1.42.2.2 mjf aprint_naive(": ACPI Embedded Controller (disabled)\n"); 261 1.42.2.2 mjf aprint_normal(": ACPI Embedded Controller (disabled)\n"); 262 1.42.2.2 mjf if (!pmf_device_register(self, NULL, NULL)) 263 1.42.2.2 mjf aprint_error_dev(self, "couldn't establish power handler\n"); 264 1.17 mycroft return; 265 1.42.2.2 mjf } 266 1.42.2.2 mjf 267 1.42.2.2 mjf aprint_naive(": ACPI Embedded Controller\n"); 268 1.42.2.2 mjf aprint_normal(": ACPI Embedded Controller\n"); 269 1.17 mycroft 270 1.42.2.2 mjf if (!acpiec_parse_gpe_package(self, aa->aa_node->ad_handle, 271 1.42.2.2 mjf &gpe_handle, &gpebit)) 272 1.17 mycroft return; 273 1.17 mycroft 274 1.42.2.2 mjf rv = acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS", 275 1.42.2.2 mjf &ec_res, &acpi_resource_parse_ops_default); 276 1.42.2.2 mjf if (rv != AE_OK) { 277 1.42.2.2 mjf aprint_error_dev(self, "resource parsing failed: %s\n", 278 1.42.2.2 mjf AcpiFormatException(rv)); 279 1.23 kochi return; 280 1.23 kochi } 281 1.23 kochi 282 1.42.2.2 mjf if ((io0 = acpi_res_io(&ec_res, 0)) == NULL) { 283 1.42.2.2 mjf aprint_error_dev(self, "no data register resource\n"); 284 1.42.2.2 mjf goto free_res; 285 1.42.2.2 mjf } 286 1.42.2.2 mjf if ((io1 = acpi_res_io(&ec_res, 1)) == NULL) { 287 1.42.2.2 mjf aprint_error_dev(self, "no CSR register resource\n"); 288 1.42.2.2 mjf goto free_res; 289 1.42.2.2 mjf } 290 1.42.2.2 mjf 291 1.42.2.2 mjf acpiec_common_attach(parent, self, aa->aa_node->ad_handle, 292 1.42.2.2 mjf io1->ar_base, io0->ar_base, gpe_handle, gpebit); 293 1.23 kochi 294 1.42.2.2 mjf free_res: 295 1.42.2.2 mjf acpi_resource_cleanup(&ec_res); 296 1.42.2.2 mjf } 297 1.23 kochi 298 1.42.2.2 mjf static void 299 1.42.2.2 mjf acpiec_common_attach(device_t parent, device_t self, 300 1.42.2.2 mjf ACPI_HANDLE ec_handle, bus_addr_t cmd_reg, bus_addr_t data_reg, 301 1.42.2.2 mjf ACPI_HANDLE gpe_handle, uint8_t gpebit) 302 1.42.2.2 mjf { 303 1.42.2.2 mjf struct acpiec_softc *sc = device_private(self); 304 1.42.2.2 mjf ACPI_STATUS rv; 305 1.42.2.2 mjf ACPI_INTEGER val; 306 1.23 kochi 307 1.42.2.2 mjf sc->sc_ech = ec_handle; 308 1.42.2.2 mjf sc->sc_gpeh = gpe_handle; 309 1.42.2.2 mjf sc->sc_gpebit = gpebit; 310 1.42.2.2 mjf 311 1.42.2.2 mjf sc->sc_state = EC_STATE_FREE; 312 1.42.2.2 mjf mutex_init(&sc->sc_mtx, MUTEX_DRIVER, IPL_TTY); 313 1.42.2.2 mjf mutex_init(&sc->sc_access_mtx, MUTEX_DEFAULT, IPL_NONE); 314 1.42.2.2 mjf cv_init(&sc->sc_cv, "eccv"); 315 1.42.2.2 mjf cv_init(&sc->sc_cv_sci, "ecsci"); 316 1.42.2.2 mjf 317 1.42.2.2 mjf if (bus_space_map(sc->sc_data_st, data_reg, 1, 0, 318 1.42.2.2 mjf &sc->sc_data_sh) != 0) { 319 1.42.2.2 mjf aprint_error_dev(self, "unable to map data register\n"); 320 1.42.2.2 mjf return; 321 1.42.2.2 mjf } 322 1.23 kochi 323 1.42.2.2 mjf if (bus_space_map(sc->sc_csr_st, cmd_reg, 1, 0, &sc->sc_csr_sh) != 0) { 324 1.42.2.2 mjf aprint_error_dev(self, "unable to map CSR register\n"); 325 1.42.2.2 mjf goto post_data_map; 326 1.23 kochi } 327 1.23 kochi 328 1.42.2.2 mjf rv = acpi_eval_integer(sc->sc_ech, "_GLK", &val); 329 1.42.2.2 mjf if (rv == AE_OK) { 330 1.42.2.2 mjf sc->sc_need_global_lock = val != 0; 331 1.42.2.2 mjf } else if (rv != AE_NOT_FOUND) { 332 1.42.2.2 mjf aprint_error_dev(self, "unable to evaluate _GLK: %s\n", 333 1.42.2.2 mjf AcpiFormatException(rv)); 334 1.42.2.2 mjf goto post_csr_map; 335 1.42.2.2 mjf } else { 336 1.42.2.2 mjf sc->sc_need_global_lock = false; 337 1.33 kochi } 338 1.42.2.2 mjf if (sc->sc_need_global_lock) 339 1.42.2.2 mjf aprint_normal_dev(self, "using global ACPI lock\n"); 340 1.33 kochi 341 1.42.2.2 mjf callout_init(&sc->sc_pseudo_intr, CALLOUT_MPSAFE); 342 1.42.2.2 mjf callout_setfunc(&sc->sc_pseudo_intr, acpiec_callout, self); 343 1.42.2.2 mjf 344 1.42.2.2 mjf rv = AcpiInstallAddressSpaceHandler(sc->sc_ech, ACPI_ADR_SPACE_EC, 345 1.42.2.2 mjf acpiec_space_handler, acpiec_space_setup, self); 346 1.42.2.2 mjf if (rv != AE_OK) { 347 1.42.2.2 mjf aprint_error_dev(self, 348 1.42.2.2 mjf "unable to install address space handler: %s\n", 349 1.42.2.2 mjf AcpiFormatException(rv)); 350 1.42.2.2 mjf goto post_csr_map; 351 1.33 kochi } 352 1.33 kochi 353 1.42.2.2 mjf rv = AcpiInstallGpeHandler(sc->sc_gpeh, sc->sc_gpebit, 354 1.42.2.2 mjf ACPI_GPE_EDGE_TRIGGERED, acpiec_gpe_handler, self); 355 1.42.2.2 mjf if (rv != AE_OK) { 356 1.42.2.2 mjf aprint_error_dev(self, "unable to install GPE handler: %s\n", 357 1.23 kochi AcpiFormatException(rv)); 358 1.42.2.2 mjf goto post_csr_map; 359 1.17 mycroft } 360 1.23 kochi 361 1.42.2.2 mjf rv = AcpiSetGpeType(sc->sc_gpeh, sc->sc_gpebit, ACPI_GPE_TYPE_RUNTIME); 362 1.42.2.2 mjf if (rv != AE_OK) { 363 1.42.2.2 mjf aprint_error_dev(self, "unable to set GPE type: %s\n", 364 1.42.2.2 mjf AcpiFormatException(rv)); 365 1.42.2.2 mjf goto post_csr_map; 366 1.42.2.2 mjf } 367 1.23 kochi 368 1.42.2.2 mjf rv = AcpiEnableGpe(sc->sc_gpeh, sc->sc_gpebit, ACPI_ISR); 369 1.42.2.2 mjf if (rv != AE_OK) { 370 1.42.2.2 mjf aprint_error_dev(self, "unable to enable GPE: %s\n", 371 1.42.2.2 mjf AcpiFormatException(rv)); 372 1.42.2.2 mjf goto post_csr_map; 373 1.42.2.2 mjf } 374 1.23 kochi 375 1.42.2.2 mjf if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, acpiec_gpe_query, 376 1.42.2.2 mjf self, NULL, "acpiec sci thread")) { 377 1.42.2.2 mjf aprint_error_dev(self, "unable to create query kthread\n"); 378 1.42.2.2 mjf goto post_csr_map; 379 1.42.2.2 mjf } 380 1.23 kochi 381 1.42.2.2 mjf ec_singleton = self; 382 1.23 kochi 383 1.42.2.2 mjf if (!pmf_device_register(self, acpiec_suspend, acpiec_resume)) 384 1.42.2.2 mjf aprint_error_dev(self, "couldn't establish power handler\n"); 385 1.23 kochi 386 1.23 kochi return; 387 1.42.2.2 mjf 388 1.42.2.2 mjf post_csr_map: 389 1.42.2.2 mjf (void)AcpiRemoveGpeHandler(sc->sc_gpeh, sc->sc_gpebit, 390 1.42.2.2 mjf acpiec_gpe_handler); 391 1.42.2.2 mjf (void)AcpiRemoveAddressSpaceHandler(sc->sc_ech, 392 1.42.2.2 mjf ACPI_ADR_SPACE_EC, acpiec_space_handler); 393 1.42.2.2 mjf bus_space_unmap(sc->sc_csr_st, sc->sc_csr_sh, 1); 394 1.42.2.2 mjf post_data_map: 395 1.42.2.2 mjf bus_space_unmap(sc->sc_data_st, sc->sc_data_sh, 1); 396 1.17 mycroft } 397 1.17 mycroft 398 1.42.2.2 mjf static bool 399 1.42.2.2 mjf acpiec_suspend(device_t dv) 400 1.1 thorpej { 401 1.42.2.2 mjf acpiec_cold = true; 402 1.1 thorpej 403 1.42.2.2 mjf return true; 404 1.42.2.2 mjf } 405 1.1 thorpej 406 1.42.2.2 mjf static bool 407 1.42.2.2 mjf acpiec_resume(device_t dv) 408 1.42.2.2 mjf { 409 1.42.2.2 mjf acpiec_cold = false; 410 1.1 thorpej 411 1.42.2.2 mjf return true; 412 1.42.2.2 mjf } 413 1.17 mycroft 414 1.42.2.2 mjf static bool 415 1.42.2.2 mjf acpiec_parse_gpe_package(device_t self, ACPI_HANDLE ec_handle, 416 1.42.2.2 mjf ACPI_HANDLE *gpe_handle, uint8_t *gpebit) 417 1.42.2.2 mjf { 418 1.42.2.2 mjf ACPI_BUFFER buf; 419 1.42.2.2 mjf ACPI_OBJECT *p, *c; 420 1.42.2.2 mjf ACPI_STATUS rv; 421 1.1 thorpej 422 1.42.2.2 mjf rv = acpi_eval_struct(ec_handle, "_GPE", &buf); 423 1.42.2.2 mjf if (rv != AE_OK) { 424 1.42.2.2 mjf aprint_error_dev(self, "unable to evaluate _GPE: %s\n", 425 1.42.2.2 mjf AcpiFormatException(rv)); 426 1.42.2.2 mjf return false; 427 1.42.2.2 mjf } 428 1.1 thorpej 429 1.42.2.2 mjf p = buf.Pointer; 430 1.23 kochi 431 1.42.2.2 mjf if (p->Type == ACPI_TYPE_INTEGER) { 432 1.42.2.2 mjf *gpe_handle = NULL; 433 1.42.2.2 mjf *gpebit = p->Integer.Value; 434 1.42.2.2 mjf AcpiOsFree(p); 435 1.42.2.2 mjf return true; 436 1.42.2.2 mjf } 437 1.23 kochi 438 1.42.2.2 mjf if (p->Type != ACPI_TYPE_PACKAGE) { 439 1.42.2.2 mjf aprint_error_dev(self, "_GPE is neither integer nor package\n"); 440 1.42.2.2 mjf AcpiOsFree(p); 441 1.42.2.2 mjf return false; 442 1.42.2.2 mjf } 443 1.42.2.2 mjf 444 1.42.2.2 mjf if (p->Package.Count != 2) { 445 1.42.2.2 mjf aprint_error_dev(self, "_GPE package does not contain 2 elements\n"); 446 1.42.2.2 mjf AcpiOsFree(p); 447 1.42.2.2 mjf return false; 448 1.1 thorpej } 449 1.1 thorpej 450 1.42.2.2 mjf c = &p->Package.Elements[0]; 451 1.42.2.2 mjf switch (c->Type) { 452 1.42.2.2 mjf case ACPI_TYPE_LOCAL_REFERENCE: 453 1.42.2.2 mjf case ACPI_TYPE_ANY: 454 1.42.2.2 mjf *gpe_handle = c->Reference.Handle; 455 1.42.2.2 mjf break; 456 1.42.2.2 mjf case ACPI_TYPE_STRING: 457 1.42.2.2 mjf /* XXX should be using real scope here */ 458 1.42.2.2 mjf rv = AcpiGetHandle(NULL, p->String.Pointer, gpe_handle); 459 1.42.2.2 mjf if (rv != AE_OK) { 460 1.42.2.2 mjf aprint_error_dev(self, 461 1.42.2.2 mjf "_GPE device reference unresolvable\n"); 462 1.42.2.2 mjf AcpiOsFree(p); 463 1.42.2.2 mjf return false; 464 1.42.2.2 mjf } 465 1.42.2.2 mjf break; 466 1.42.2.2 mjf default: 467 1.42.2.2 mjf aprint_error_dev(self, "_GPE device reference incorrect\n"); 468 1.42.2.2 mjf AcpiOsFree(p); 469 1.42.2.2 mjf return false; 470 1.42.2.2 mjf } 471 1.42.2.2 mjf c = &p->Package.Elements[1]; 472 1.42.2.2 mjf if (c->Type != ACPI_TYPE_INTEGER) { 473 1.42.2.2 mjf aprint_error_dev(self, 474 1.42.2.2 mjf "_GPE package needs integer as 2nd field\n"); 475 1.42.2.2 mjf AcpiOsFree(p); 476 1.42.2.2 mjf return false; 477 1.42.2.2 mjf } 478 1.42.2.2 mjf *gpebit = c->Integer.Value; 479 1.42.2.2 mjf AcpiOsFree(p); 480 1.42.2.2 mjf return true; 481 1.42.2.2 mjf } 482 1.23 kochi 483 1.42.2.2 mjf static uint8_t 484 1.42.2.2 mjf acpiec_read_data(struct acpiec_softc *sc) 485 1.42.2.2 mjf { 486 1.42.2.2 mjf return bus_space_read_1(sc->sc_data_st, sc->sc_data_sh, 0); 487 1.42.2.2 mjf } 488 1.17 mycroft 489 1.42.2.2 mjf static void 490 1.42.2.2 mjf acpiec_write_data(struct acpiec_softc *sc, uint8_t val) 491 1.42.2.2 mjf { 492 1.42.2.2 mjf bus_space_write_1(sc->sc_data_st, sc->sc_data_sh, 0, val); 493 1.42.2.2 mjf } 494 1.1 thorpej 495 1.42.2.2 mjf static uint8_t 496 1.42.2.2 mjf acpiec_read_status(struct acpiec_softc *sc) 497 1.42.2.2 mjf { 498 1.42.2.2 mjf return bus_space_read_1(sc->sc_csr_st, sc->sc_csr_sh, 0); 499 1.42.2.2 mjf } 500 1.33 kochi 501 1.42.2.2 mjf static void 502 1.42.2.2 mjf acpiec_write_command(struct acpiec_softc *sc, uint8_t cmd) 503 1.42.2.2 mjf { 504 1.42.2.2 mjf bus_space_write_1(sc->sc_csr_st, sc->sc_csr_sh, 0, cmd); 505 1.42.2.2 mjf } 506 1.33 kochi 507 1.42.2.2 mjf static ACPI_STATUS 508 1.42.2.2 mjf acpiec_space_setup(ACPI_HANDLE region, UINT32 func, void *arg, 509 1.42.2.2 mjf void **region_arg) 510 1.42.2.2 mjf { 511 1.42.2.2 mjf if (func == ACPI_REGION_DEACTIVATE) 512 1.42.2.2 mjf *region_arg = NULL; 513 1.42.2.2 mjf else 514 1.42.2.2 mjf *region_arg = arg; 515 1.1 thorpej 516 1.42.2.2 mjf return AE_OK; 517 1.1 thorpej } 518 1.1 thorpej 519 1.1 thorpej static void 520 1.42.2.2 mjf acpiec_lock(device_t dv) 521 1.1 thorpej { 522 1.42.2.2 mjf struct acpiec_softc *sc = device_private(dv); 523 1.25 kochi ACPI_STATUS rv; 524 1.1 thorpej 525 1.42.2.2 mjf mutex_enter(&sc->sc_access_mtx); 526 1.1 thorpej 527 1.42.2.2 mjf if (sc->sc_need_global_lock) { 528 1.42.2.2 mjf rv = AcpiAcquireGlobalLock(EC_LOCK_TIMEOUT, &sc->sc_global_lock); 529 1.42.2.2 mjf if (rv != AE_OK) { 530 1.42.2.2 mjf aprint_error_dev(dv, "failed to acquire global lock: %s\n", 531 1.25 kochi AcpiFormatException(rv)); 532 1.42.2.2 mjf return; 533 1.1 thorpej } 534 1.1 thorpej } 535 1.42.2.2 mjf } 536 1.1 thorpej 537 1.42.2.2 mjf static void 538 1.42.2.2 mjf acpiec_unlock(device_t dv) 539 1.42.2.2 mjf { 540 1.42.2.2 mjf struct acpiec_softc *sc = device_private(dv); 541 1.42.2.2 mjf ACPI_STATUS rv; 542 1.1 thorpej 543 1.42.2.2 mjf if (sc->sc_need_global_lock) { 544 1.42.2.2 mjf rv = AcpiReleaseGlobalLock(sc->sc_global_lock); 545 1.42.2.2 mjf if (rv != AE_OK) { 546 1.42.2.2 mjf aprint_error_dev(dv, "failed to release global lock: %s\n", 547 1.42.2.2 mjf AcpiFormatException(rv)); 548 1.42.2.2 mjf } 549 1.42.2.2 mjf } 550 1.42.2.2 mjf mutex_exit(&sc->sc_access_mtx); 551 1.1 thorpej } 552 1.1 thorpej 553 1.42.2.2 mjf static ACPI_STATUS 554 1.42.2.2 mjf acpiec_read(device_t dv, uint8_t addr, uint8_t *val) 555 1.1 thorpej { 556 1.42.2.2 mjf struct acpiec_softc *sc = device_private(dv); 557 1.42.2.2 mjf int i; 558 1.1 thorpej 559 1.42.2.2 mjf acpiec_lock(dv); 560 1.42.2.2 mjf mutex_enter(&sc->sc_mtx); 561 1.42.2.2 mjf 562 1.42.2.2 mjf sc->sc_cur_addr = addr; 563 1.42.2.2 mjf sc->sc_state = EC_STATE_READ; 564 1.42.2.2 mjf 565 1.42.2.2 mjf for (i = 0; i < EC_POLL_TIMEOUT; ++i) { 566 1.42.2.2 mjf acpiec_gpe_state_machine(dv); 567 1.42.2.2 mjf if (sc->sc_state == EC_STATE_FREE) 568 1.42.2.2 mjf goto done; 569 1.42.2.2 mjf delay(1); 570 1.42.2.2 mjf } 571 1.42.2.2 mjf 572 1.42.2.2 mjf if (cold || acpiec_cold) { 573 1.42.2.2 mjf while (sc->sc_state != EC_STATE_FREE) { 574 1.42.2.2 mjf delay(1); 575 1.42.2.2 mjf acpiec_gpe_state_machine(dv); 576 1.1 thorpej } 577 1.42.2.2 mjf } else while (cv_timedwait(&sc->sc_cv, &sc->sc_mtx, EC_CMD_TIMEOUT * hz)) { 578 1.42.2.2 mjf mutex_exit(&sc->sc_mtx); 579 1.42.2.2 mjf AcpiClearGpe(sc->sc_gpeh, sc->sc_gpebit, ACPI_NOT_ISR); 580 1.42.2.2 mjf acpiec_unlock(dv); 581 1.42.2.2 mjf aprint_error_dev(dv, "command takes over %d sec...\n", EC_CMD_TIMEOUT); 582 1.42.2.2 mjf return AE_ERROR; 583 1.1 thorpej } 584 1.33 kochi 585 1.42.2.2 mjf done: 586 1.42.2.2 mjf *val = sc->sc_cur_val; 587 1.42.2.2 mjf 588 1.42.2.2 mjf mutex_exit(&sc->sc_mtx); 589 1.42.2.2 mjf acpiec_unlock(dv); 590 1.42.2.2 mjf return AE_OK; 591 1.1 thorpej } 592 1.1 thorpej 593 1.1 thorpej static ACPI_STATUS 594 1.42.2.2 mjf acpiec_write(device_t dv, uint8_t addr, uint8_t val) 595 1.1 thorpej { 596 1.42.2.2 mjf struct acpiec_softc *sc = device_private(dv); 597 1.42.2.2 mjf int i; 598 1.1 thorpej 599 1.42.2.2 mjf acpiec_lock(dv); 600 1.42.2.2 mjf mutex_enter(&sc->sc_mtx); 601 1.1 thorpej 602 1.42.2.2 mjf sc->sc_cur_addr = addr; 603 1.42.2.2 mjf sc->sc_cur_val = val; 604 1.42.2.2 mjf sc->sc_state = EC_STATE_WRITE; 605 1.42.2.2 mjf 606 1.42.2.2 mjf for (i = 0; i < EC_POLL_TIMEOUT; ++i) { 607 1.42.2.2 mjf acpiec_gpe_state_machine(dv); 608 1.42.2.2 mjf if (sc->sc_state == EC_STATE_FREE) 609 1.42.2.2 mjf goto done; 610 1.42.2.2 mjf delay(1); 611 1.42.2.2 mjf } 612 1.42.2.2 mjf 613 1.42.2.2 mjf if (cold || acpiec_cold) { 614 1.42.2.2 mjf while (sc->sc_state != EC_STATE_FREE) { 615 1.42.2.2 mjf delay(1); 616 1.42.2.2 mjf acpiec_gpe_state_machine(dv); 617 1.42.2.2 mjf } 618 1.42.2.2 mjf } else while (cv_timedwait(&sc->sc_cv, &sc->sc_mtx, EC_CMD_TIMEOUT * hz)) { 619 1.42.2.2 mjf mutex_exit(&sc->sc_mtx); 620 1.42.2.2 mjf AcpiClearGpe(sc->sc_gpeh, sc->sc_gpebit, ACPI_NOT_ISR); 621 1.42.2.2 mjf acpiec_unlock(dv); 622 1.42.2.2 mjf aprint_error_dev(dv, "command takes over %d sec...\n", EC_CMD_TIMEOUT); 623 1.42.2.2 mjf return AE_ERROR; 624 1.42.2.2 mjf } 625 1.1 thorpej 626 1.42.2.2 mjf done: 627 1.42.2.2 mjf mutex_exit(&sc->sc_mtx); 628 1.42.2.2 mjf acpiec_unlock(dv); 629 1.42.2.2 mjf return AE_OK; 630 1.1 thorpej } 631 1.1 thorpej 632 1.1 thorpej static ACPI_STATUS 633 1.42.2.2 mjf acpiec_space_handler(UINT32 func, ACPI_PHYSICAL_ADDRESS paddr, 634 1.42.2.2 mjf UINT32 width, ACPI_INTEGER *value, void *arg, void *region_arg) 635 1.1 thorpej { 636 1.42.2.2 mjf device_t dv; 637 1.42.2.2 mjf struct acpiec_softc *sc; 638 1.42.2.2 mjf ACPI_STATUS rv; 639 1.42.2.2 mjf uint8_t addr, reg; 640 1.42.2.2 mjf unsigned int i; 641 1.42.2.2 mjf 642 1.42.2.2 mjf if (paddr > 0xff || width % 8 != 0 || value == NULL || arg == NULL || 643 1.42.2.2 mjf paddr + width / 8 > 0xff) 644 1.42.2.2 mjf return AE_BAD_PARAMETER; 645 1.1 thorpej 646 1.42.2.2 mjf addr = paddr; 647 1.42.2.2 mjf dv = arg; 648 1.42.2.2 mjf sc = device_private(dv); 649 1.1 thorpej 650 1.42.2.2 mjf rv = AE_OK; 651 1.1 thorpej 652 1.42.2.2 mjf switch (func) { 653 1.4 thorpej case ACPI_READ: 654 1.42.2.2 mjf *value = 0; 655 1.42.2.2 mjf for (i = 0; i < width; i += 8, ++addr) { 656 1.42.2.2 mjf rv = acpiec_read(dv, addr, ®); 657 1.42.2.2 mjf if (rv != AE_OK) 658 1.42.2.2 mjf break; 659 1.42.2.2 mjf *value |= (ACPI_INTEGER)reg << i; 660 1.42.2.2 mjf } 661 1.1 thorpej break; 662 1.4 thorpej case ACPI_WRITE: 663 1.42.2.2 mjf for (i = 0; i < width; i += 8, ++addr) { 664 1.42.2.2 mjf reg = (*value >>i) & 0xff; 665 1.42.2.2 mjf rv = acpiec_write(dv, addr, reg); 666 1.42.2.2 mjf if (rv != AE_OK) 667 1.42.2.2 mjf break; 668 1.42.2.2 mjf } 669 1.1 thorpej break; 670 1.1 thorpej default: 671 1.42.2.2 mjf aprint_error("%s: invalid Address Space function called: %x\n", 672 1.42.2.2 mjf device_xname(dv), (unsigned int)func); 673 1.42.2.2 mjf return AE_BAD_PARAMETER; 674 1.1 thorpej } 675 1.1 thorpej 676 1.42.2.2 mjf return rv; 677 1.1 thorpej } 678 1.1 thorpej 679 1.42.2.2 mjf static void 680 1.42.2.2 mjf acpiec_gpe_query(void *arg) 681 1.1 thorpej { 682 1.42.2.2 mjf device_t dv = arg; 683 1.42.2.2 mjf struct acpiec_softc *sc = device_private(dv); 684 1.42.2.2 mjf uint8_t reg; 685 1.42.2.2 mjf char qxx[5]; 686 1.42.2.2 mjf ACPI_STATUS rv; 687 1.1 thorpej int i; 688 1.1 thorpej 689 1.42.2.2 mjf loop: 690 1.42.2.2 mjf mutex_enter(&sc->sc_mtx); 691 1.1 thorpej 692 1.42.2.2 mjf if (sc->sc_got_sci == false) 693 1.42.2.2 mjf cv_wait(&sc->sc_cv_sci, &sc->sc_mtx); 694 1.42.2.2 mjf mutex_exit(&sc->sc_mtx); 695 1.1 thorpej 696 1.42.2.2 mjf acpiec_lock(dv); 697 1.42.2.2 mjf mutex_enter(&sc->sc_mtx); 698 1.1 thorpej 699 1.42.2.2 mjf /* The Query command can always be issued, so be defensive here. */ 700 1.42.2.2 mjf sc->sc_got_sci = false; 701 1.42.2.2 mjf sc->sc_state = EC_STATE_QUERY; 702 1.1 thorpej 703 1.42.2.2 mjf for (i = 0; i < EC_POLL_TIMEOUT; ++i) { 704 1.42.2.2 mjf acpiec_gpe_state_machine(dv); 705 1.42.2.2 mjf if (sc->sc_state == EC_STATE_FREE) 706 1.42.2.2 mjf goto done; 707 1.42.2.2 mjf delay(1); 708 1.42.2.2 mjf } 709 1.1 thorpej 710 1.42.2.2 mjf cv_wait(&sc->sc_cv, &sc->sc_mtx); 711 1.42.2.2 mjf 712 1.42.2.2 mjf done: 713 1.42.2.2 mjf reg = sc->sc_cur_val; 714 1.1 thorpej 715 1.42.2.2 mjf mutex_exit(&sc->sc_mtx); 716 1.42.2.2 mjf acpiec_unlock(dv); 717 1.1 thorpej 718 1.42.2.2 mjf if (reg == 0) 719 1.42.2.2 mjf goto loop; /* Spurious query result */ 720 1.1 thorpej 721 1.42.2.2 mjf /* 722 1.42.2.2 mjf * Evaluate _Qxx to respond to the controller. 723 1.42.2.2 mjf */ 724 1.42.2.2 mjf snprintf(qxx, sizeof(qxx), "_Q%02X", (unsigned int)reg); 725 1.42.2.2 mjf rv = AcpiEvaluateObject(sc->sc_ech, qxx, NULL, NULL); 726 1.42.2.2 mjf if (rv != AE_OK && rv != AE_NOT_FOUND) { 727 1.42.2.2 mjf aprint_error("%s: GPE query method %s failed: %s", 728 1.42.2.2 mjf device_xname(dv), qxx, AcpiFormatException(rv)); 729 1.1 thorpej } 730 1.1 thorpej 731 1.42.2.2 mjf goto loop; 732 1.24 kochi } 733 1.1 thorpej 734 1.42.2.2 mjf static void 735 1.42.2.2 mjf acpiec_gpe_state_machine(device_t dv) 736 1.1 thorpej { 737 1.42.2.2 mjf struct acpiec_softc *sc = device_private(dv); 738 1.42.2.2 mjf uint8_t reg; 739 1.1 thorpej 740 1.42.2.2 mjf reg = acpiec_read_status(sc); 741 1.1 thorpej 742 1.42.2.2 mjf if (reg & EC_STATUS_SCI) 743 1.42.2.2 mjf sc->sc_got_sci = true; 744 1.42.2.2 mjf 745 1.42.2.2 mjf switch (sc->sc_state) { 746 1.42.2.2 mjf case EC_STATE_QUERY: 747 1.42.2.2 mjf if ((reg & EC_STATUS_IBF) != 0) 748 1.42.2.2 mjf break; /* Nothing of interest here. */ 749 1.42.2.2 mjf acpiec_write_command(sc, EC_COMMAND_QUERY); 750 1.42.2.2 mjf sc->sc_state = EC_STATE_QUERY_VAL; 751 1.42.2.2 mjf break; 752 1.1 thorpej 753 1.42.2.2 mjf case EC_STATE_QUERY_VAL: 754 1.42.2.2 mjf if ((reg & EC_STATUS_OBF) == 0) 755 1.42.2.2 mjf break; /* Nothing of interest here. */ 756 1.1 thorpej 757 1.42.2.2 mjf sc->sc_cur_val = acpiec_read_data(sc); 758 1.42.2.2 mjf sc->sc_state = EC_STATE_FREE; 759 1.1 thorpej 760 1.42.2.2 mjf cv_signal(&sc->sc_cv); 761 1.42.2.2 mjf break; 762 1.1 thorpej 763 1.42.2.2 mjf case EC_STATE_READ: 764 1.42.2.2 mjf if ((reg & EC_STATUS_IBF) != 0) 765 1.42.2.2 mjf break; /* Nothing of interest here. */ 766 1.42.2.2 mjf 767 1.42.2.2 mjf acpiec_write_command(sc, EC_COMMAND_READ); 768 1.42.2.2 mjf sc->sc_state = EC_STATE_READ_ADDR; 769 1.1 thorpej break; 770 1.1 thorpej 771 1.42.2.2 mjf case EC_STATE_READ_ADDR: 772 1.42.2.2 mjf if ((reg & EC_STATUS_IBF) != 0) 773 1.42.2.2 mjf break; /* Nothing of interest here. */ 774 1.42.2.2 mjf 775 1.42.2.2 mjf acpiec_write_data(sc, sc->sc_cur_addr); 776 1.42.2.2 mjf sc->sc_state = EC_STATE_READ_VAL; 777 1.1 thorpej break; 778 1.1 thorpej 779 1.42.2.2 mjf case EC_STATE_READ_VAL: 780 1.42.2.2 mjf if ((reg & EC_STATUS_OBF) == 0) 781 1.42.2.2 mjf break; /* Nothing of interest here. */ 782 1.42.2.2 mjf sc->sc_cur_val = acpiec_read_data(sc); 783 1.42.2.2 mjf sc->sc_state = EC_STATE_FREE; 784 1.42.2.2 mjf 785 1.42.2.2 mjf cv_signal(&sc->sc_cv); 786 1.1 thorpej break; 787 1.1 thorpej 788 1.42.2.2 mjf case EC_STATE_WRITE: 789 1.42.2.2 mjf if ((reg & EC_STATUS_IBF) != 0) 790 1.42.2.2 mjf break; /* Nothing of interest here. */ 791 1.1 thorpej 792 1.42.2.2 mjf acpiec_write_command(sc, EC_COMMAND_WRITE); 793 1.42.2.2 mjf sc->sc_state = EC_STATE_WRITE_ADDR; 794 1.42.2.2 mjf break; 795 1.1 thorpej 796 1.42.2.2 mjf case EC_STATE_WRITE_ADDR: 797 1.42.2.2 mjf if ((reg & EC_STATUS_IBF) != 0) 798 1.42.2.2 mjf break; /* Nothing of interest here. */ 799 1.42.2.2 mjf acpiec_write_data(sc, sc->sc_cur_addr); 800 1.42.2.2 mjf sc->sc_state = EC_STATE_WRITE_VAL; 801 1.42.2.2 mjf break; 802 1.1 thorpej 803 1.42.2.2 mjf case EC_STATE_WRITE_VAL: 804 1.42.2.2 mjf if ((reg & EC_STATUS_IBF) != 0) 805 1.42.2.2 mjf break; /* Nothing of interest here. */ 806 1.42.2.2 mjf sc->sc_state = EC_STATE_FREE; 807 1.42.2.2 mjf cv_signal(&sc->sc_cv); 808 1.1 thorpej 809 1.42.2.2 mjf acpiec_write_data(sc, sc->sc_cur_val); 810 1.42.2.2 mjf break; 811 1.1 thorpej 812 1.42.2.2 mjf case EC_STATE_FREE: 813 1.42.2.2 mjf if (sc->sc_got_sci) 814 1.42.2.2 mjf cv_signal(&sc->sc_cv_sci); 815 1.42.2.2 mjf break; 816 1.42.2.2 mjf default: 817 1.42.2.2 mjf panic("invalid state"); 818 1.1 thorpej } 819 1.1 thorpej 820 1.42.2.2 mjf if (sc->sc_state != EC_STATE_FREE) 821 1.42.2.2 mjf callout_schedule(&sc->sc_pseudo_intr, 1); 822 1.42.2.2 mjf } 823 1.1 thorpej 824 1.42.2.2 mjf static void 825 1.42.2.2 mjf acpiec_callout(void *arg) 826 1.42.2.2 mjf { 827 1.42.2.2 mjf device_t dv = arg; 828 1.42.2.2 mjf struct acpiec_softc *sc = device_private(dv); 829 1.1 thorpej 830 1.42.2.2 mjf AcpiClearGpe(sc->sc_gpeh, sc->sc_gpebit, ACPI_NOT_ISR); 831 1.1 thorpej 832 1.42.2.2 mjf mutex_enter(&sc->sc_mtx); 833 1.42.2.2 mjf acpiec_gpe_state_machine(dv); 834 1.42.2.2 mjf mutex_exit(&sc->sc_mtx); 835 1.24 kochi } 836 1.1 thorpej 837 1.42.2.2 mjf static UINT32 838 1.42.2.2 mjf acpiec_gpe_handler(void *arg) 839 1.1 thorpej { 840 1.42.2.2 mjf device_t dv = arg; 841 1.42.2.2 mjf struct acpiec_softc *sc = device_private(dv); 842 1.1 thorpej 843 1.42.2.2 mjf AcpiClearGpe(sc->sc_gpeh, sc->sc_gpebit, ACPI_ISR); 844 1.1 thorpej 845 1.42.2.2 mjf mutex_enter(&sc->sc_mtx); 846 1.42.2.2 mjf acpiec_gpe_state_machine(dv); 847 1.42.2.2 mjf mutex_exit(&sc->sc_mtx); 848 1.1 thorpej 849 1.42.2.2 mjf return 0; 850 1.42.2.2 mjf } 851 1.1 thorpej 852 1.42.2.2 mjf ACPI_STATUS 853 1.42.2.2 mjf acpiec_bus_read(device_t dv, u_int addr, ACPI_INTEGER *val, int width) 854 1.42.2.2 mjf { 855 1.42.2.2 mjf return acpiec_space_handler(ACPI_READ, addr, width * 8, val, dv, NULL); 856 1.42.2.2 mjf } 857 1.1 thorpej 858 1.42.2.2 mjf ACPI_STATUS 859 1.42.2.2 mjf acpiec_bus_write(device_t dv, u_int addr, ACPI_INTEGER val, int width) 860 1.42.2.2 mjf { 861 1.42.2.2 mjf return acpiec_space_handler(ACPI_WRITE, addr, width * 8, &val, dv, NULL); 862 1.42.2.2 mjf } 863 1.1 thorpej 864 1.42.2.2 mjf ACPI_HANDLE 865 1.42.2.2 mjf acpiec_get_handle(device_t dv) 866 1.42.2.2 mjf { 867 1.42.2.2 mjf struct acpiec_softc *sc = device_private(dv); 868 1.1 thorpej 869 1.42.2.2 mjf return sc->sc_ech; 870 1.1 thorpej } 871
Indexes created Thu Oct 02 07:10:07 GMT 2025