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Diffstat (limited to 'sys/dev/acpica/acpi.c')
| -rw-r--r-- | sys/dev/acpica/acpi.c | 1124 |
1 files changed, 1124 insertions, 0 deletions
diff --git a/sys/dev/acpica/acpi.c b/sys/dev/acpica/acpi.c new file mode 100644 index 0000000..651a7737 --- /dev/null +++ b/sys/dev/acpica/acpi.c @@ -0,0 +1,1124 @@ +/*- + * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org> + * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org> + * Copyright (c) 2000 Michael Smith + * Copyright (c) 2000 BSDi + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include "opt_acpi.h" +#include <sys/param.h> +#include <sys/kernel.h> +#include <sys/malloc.h> +#include <sys/bus.h> +#include <sys/conf.h> +#include <sys/ioccom.h> +#include <sys/reboot.h> +#include <sys/sysctl.h> +#include <sys/ctype.h> + +#include <machine/clock.h> + +#include <machine/resource.h> + +#include "acpi.h" + +#include <dev/acpica/acpivar.h> +#include <dev/acpica/acpiio.h> + +#include <pci/pcivar.h> +#include "pcib_if.h" + +MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); + +/* + * Character device + */ + +static d_open_t acpiopen; +static d_close_t acpiclose; +static d_ioctl_t acpiioctl; + +#define CDEV_MAJOR 152 +static struct cdevsw acpi_cdevsw = { + acpiopen, + acpiclose, + noread, + nowrite, + acpiioctl, + nopoll, + nommap, + nostrategy, + "acpi", + CDEV_MAJOR, + nodump, + nopsize, + 0, + -1 +}; + +static void acpi_identify(driver_t *driver, device_t parent); +static int acpi_probe(device_t dev); +static int acpi_attach(device_t dev); +static device_t acpi_add_child(device_t bus, int order, const char *name, int unit); +static int acpi_print_resources(struct resource_list *rl, const char *name, int type, + const char *format); +static int acpi_print_child(device_t bus, device_t child); +static int acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result); +static int acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value); +static int acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, + u_long count); +static int acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, + u_long *countp); +static struct resource *acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, + u_long start, u_long end, u_long count, u_int flags); +static int acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r); + +static void acpi_probe_children(device_t bus); +static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status); + +static void acpi_shutdown_pre_sync(void *arg, int howto); +static void acpi_shutdown_final(void *arg, int howto); + +#ifdef ACPI_DEBUG +static void acpi_set_debugging(void); +#endif + +static void acpi_system_eventhandler_sleep(void *arg, int state); +static void acpi_system_eventhandler_wakeup(void *arg, int state); + +static device_method_t acpi_methods[] = { + /* Device interface */ + DEVMETHOD(device_identify, acpi_identify), + DEVMETHOD(device_probe, acpi_probe), + DEVMETHOD(device_attach, acpi_attach), + DEVMETHOD(device_shutdown, bus_generic_shutdown), + DEVMETHOD(device_suspend, bus_generic_suspend), + DEVMETHOD(device_resume, bus_generic_resume), + + /* Bus interface */ + DEVMETHOD(bus_add_child, acpi_add_child), + DEVMETHOD(bus_print_child, acpi_print_child), + DEVMETHOD(bus_read_ivar, acpi_read_ivar), + DEVMETHOD(bus_write_ivar, acpi_write_ivar), + DEVMETHOD(bus_set_resource, acpi_set_resource), + DEVMETHOD(bus_get_resource, acpi_get_resource), + DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), + DEVMETHOD(bus_release_resource, acpi_release_resource), + DEVMETHOD(bus_driver_added, bus_generic_driver_added), + DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), + DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), + DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), + DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), + + {0, 0} +}; + +static driver_t acpi_driver = { + "acpi", + acpi_methods, + sizeof(struct acpi_softc), +}; + +devclass_t acpi_devclass; +DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, 0, 0); + +SYSCTL_INT(_debug, OID_AUTO, acpi_debug_layer, CTLFLAG_RW, &AcpiDbgLayer, 0, ""); +SYSCTL_INT(_debug, OID_AUTO, acpi_debug_level, CTLFLAG_RW, &AcpiDbgLevel, 0, ""); + +/* + * Detect ACPI, perform early initialisation + */ +static void +acpi_identify(driver_t *driver, device_t parent) +{ + device_t child; + void *rsdp; + int error; +#ifdef ENABLE_DEBUGGER + char *debugpoint = getenv("debug.acpi.debugger"); +#endif + + /* + * Make sure we're not being doubly invoked. + */ + if (device_find_child(parent, "acpi", 0) != NULL) + return; + +#ifdef ACPI_DEBUG + acpi_set_debugging(); +#endif + + /* + * Start up ACPICA + */ +#ifdef ENABLE_DEBUGGER + if (debugpoint && !strcmp(debugpoint, "init")) + acpi_EnterDebugger(); +#endif + if ((error = AcpiInitializeSubsystem()) != AE_OK) { + printf("ACPI: initialisation failed: %s\n", acpi_strerror(error)); + return; + } +#ifdef ENABLE_DEBUGGER + if (debugpoint && !strcmp(debugpoint, "tables")) + acpi_EnterDebugger(); +#endif + if (((error = AcpiFindRootPointer(&rsdp)) != AE_OK) || + ((error = AcpiLoadTables(rsdp)) != AE_OK)) { + printf("ACPI: table load failed: %s\n", acpi_strerror(error)); + return; + } + + /* + * Attach the actual ACPI device. + */ + if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { + device_printf(parent, "ACPI: could not attach\n"); + return; + } +} + +/* + * Fetch some descriptive data from ACPI to put in our attach message + */ +static int +acpi_probe(device_t dev) +{ + ACPI_TABLE_HEADER th; + char buf[20]; + int error; + + if ((error = AcpiGetTableHeader(ACPI_TABLE_RSDT, 1, &th)) != AE_OK) { + device_printf(dev, "couldn't get RSDT header: %s\n", acpi_strerror(error)); + return(ENXIO); + } + sprintf(buf, "%.6s %.8s", th.OemId, th.OemTableId); + device_set_desc_copy(dev, buf); + + return(0); +} + +static int +acpi_attach(device_t dev) +{ + struct acpi_softc *sc; + int error; +#ifdef ENABLE_DEBUGGER + char *debugpoint = getenv("debug.acpi.debugger"); +#endif + + + sc = device_get_softc(dev); + bzero(sc, sizeof(*sc)); + sc->acpi_dev = dev; + +#ifdef ENABLE_DEBUGGER + if (debugpoint && !strcmp(debugpoint, "spaces")) + acpi_EnterDebugger(); +#endif + + /* + * Install the default address space handlers. + */ + if ((error = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, + ADDRESS_SPACE_SYSTEM_MEMORY, + ACPI_DEFAULT_HANDLER, + NULL, NULL)) != AE_OK) { + device_printf(dev, "could not initialise SystemMemory handler: %s\n", acpi_strerror(error)); + return(ENXIO); + } + if ((error = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, + ADDRESS_SPACE_SYSTEM_IO, + ACPI_DEFAULT_HANDLER, + NULL, NULL)) != AE_OK) { + device_printf(dev, "could not initialise SystemIO handler: %s\n", acpi_strerror(error)); + return(ENXIO); + } + if ((error = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, + ADDRESS_SPACE_PCI_CONFIG, + ACPI_DEFAULT_HANDLER, + NULL, NULL)) != AE_OK) { + device_printf(dev, "could not initialise PciConfig handler: %s\n", acpi_strerror(error)); + return(ENXIO); + } + + /* + * Bring ACPI fully online. + * + * Note that we request that device _STA and _INI methods not be run (ACPI_NO_DEVICE_INIT) + * and the final object initialisation pass be skipped (ACPI_NO_OBJECT_INIT). + * + * XXX We need to arrange for the object init pass after we have attached all our + * child devices. + */ +#ifdef ENABLE_DEBUGGER + if (debugpoint && !strcmp(debugpoint, "enable")) + acpi_EnterDebugger(); +#endif + if ((error = AcpiEnableSubsystem(ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT)) != AE_OK) { + device_printf(dev, "could not enable ACPI: %s\n", acpi_strerror(error)); + return(ENXIO); + } + + /* + * Dispatch the default sleep state to devices. + * TBD: should be configured from userland policy manager. + */ + sc->acpi_power_button_sx = ACPI_POWER_BUTTON_DEFAULT_SX; + sc->acpi_sleep_button_sx = ACPI_SLEEP_BUTTON_DEFAULT_SX; + sc->acpi_lid_switch_sx = ACPI_LID_SWITCH_DEFAULT_SX; + + /* Enable and clear fixed events and install handlers. */ + if (AcpiGbl_FACP != NULL && AcpiGbl_FACP->PwrButton == 0) { + AcpiEnableEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED); + AcpiClearEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED); + AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, acpi_eventhandler_power_button_for_sleep, sc); + device_printf(dev, "power button is handled as a fixed feature programming model.\n"); + } + if (AcpiGbl_FACP != NULL && AcpiGbl_FACP->SleepButton == 0) { + AcpiEnableEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED); + AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED); + AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, acpi_eventhandler_sleep_button_for_sleep, sc); + device_printf(dev, "sleep button is handled as a fixed feature programming model.\n"); + } + + /* + * Scan the namespace and attach/initialise children. + */ +#ifdef ENABLE_DEBUGGER + if (debugpoint && !strcmp(debugpoint, "probe")) + acpi_EnterDebugger(); +#endif + acpi_probe_children(dev); + + /* + * Register our shutdown handlers + */ + EVENTHANDLER_REGISTER(shutdown_pre_sync, acpi_shutdown_pre_sync, sc, SHUTDOWN_PRI_LAST); + EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, SHUTDOWN_PRI_LAST); + + /* + * Register our acpi event handlers. + * XXX should be configurable eg. via userland policy manager. + */ + EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, sc, ACPI_EVENT_PRI_LAST); + EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, sc, ACPI_EVENT_PRI_LAST); + + /* + * Flag our initial states. + */ + sc->acpi_enabled = 1; + sc->acpi_sstate = ACPI_STATE_S0; + + /* + * Create the control device + */ + sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, 0, 5, 0660, "acpi"); + sc->acpi_dev_t->si_drv1 = sc; + +#ifdef ENABLE_DEBUGGER + if (debugpoint && !strcmp(debugpoint, "running")) + acpi_EnterDebugger(); +#endif + return(0); +} + +/* + * Handle a new device being added + */ +static device_t +acpi_add_child(device_t bus, int order, const char *name, int unit) +{ + struct acpi_device *ad; + device_t child; + + if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT)) == NULL) + return(NULL); + bzero(ad, sizeof(*ad)); + + resource_list_init(&ad->ad_rl); + + child = device_add_child_ordered(bus, order, name, unit); + if (child != NULL) + device_set_ivars(child, ad); + return(child); +} + +/* + * Print child device resource usage + */ +static int +acpi_print_resources(struct resource_list *rl, const char *name, int type, const char *format) +{ + struct resource_list_entry *rle; + int printed, retval; + + printed = 0; + retval = 0; + + if (!SLIST_FIRST(rl)) + return(0); + + /* Yes, this is kinda cheating */ + SLIST_FOREACH(rle, rl, link) { + if (rle->type == type) { + if (printed == 0) + retval += printf(" %s ", name); + else if (printed > 0) + retval += printf(","); + printed++; + retval += printf(format, rle->start); + if (rle->count > 1) { + retval += printf("-"); + retval += printf(format, rle->start + + rle->count - 1); + } + } + } + return(retval); +} + +static int +acpi_print_child(device_t bus, device_t child) +{ + struct acpi_device *adev = device_get_ivars(child); + struct resource_list *rl = &adev->ad_rl; + int retval = 0; + + retval += bus_print_child_header(bus, child); + retval += acpi_print_resources(rl, "port", SYS_RES_IOPORT, "%#lx"); + retval += acpi_print_resources(rl, "iomem", SYS_RES_MEMORY, "%#lx"); + retval += acpi_print_resources(rl, "irq", SYS_RES_IRQ, "%ld"); + retval += bus_print_child_footer(bus, child); + + return(retval); +} + + +/* + * Handle per-device ivars + */ +static int +acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) +{ + struct acpi_device *ad; + + if ((ad = device_get_ivars(child)) == NULL) { + printf("device has no ivars\n"); + return(ENOENT); + } + + switch(index) { + /* ACPI ivars */ + case ACPI_IVAR_HANDLE: + *(ACPI_HANDLE *)result = ad->ad_handle; + break; + case ACPI_IVAR_MAGIC: + *(int *)result = ad->ad_magic; + break; + case ACPI_IVAR_PRIVATE: + *(void **)result = ad->ad_private; + break; + + default: + panic("bad ivar read request (%d)\n", index); + return(ENOENT); + } + return(0); +} + +static int +acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) +{ + struct acpi_device *ad; + + if ((ad = device_get_ivars(child)) == NULL) { + printf("device has no ivars\n"); + return(ENOENT); + } + + switch(index) { + /* ACPI ivars */ + case ACPI_IVAR_HANDLE: + ad->ad_handle = (ACPI_HANDLE)value; + break; + case ACPI_IVAR_MAGIC: + ad->ad_magic = (int )value; + break; + case ACPI_IVAR_PRIVATE: + ad->ad_private = (void *)value; + break; + + default: + panic("bad ivar write request (%d)\n", index); + return(ENOENT); + } + return(0); +} + +/* + * Handle child resource allocation/removal + */ +static int +acpi_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count) +{ + struct acpi_device *ad = device_get_ivars(child); + struct resource_list *rl = &ad->ad_rl; + + resource_list_add(rl, type, rid, start, start + count -1, count); + + return(0); +} + +static int +acpi_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp) +{ + struct acpi_device *ad = device_get_ivars(child); + struct resource_list *rl = &ad->ad_rl; + struct resource_list_entry *rle; + + rle = resource_list_find(rl, type, rid); + if (!rle) + return(ENOENT); + + if (startp) + *startp = rle->start; + if (countp) + *countp = rle->count; + + return(0); +} + +static struct resource * +acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, + u_long start, u_long end, u_long count, u_int flags) +{ + struct acpi_device *ad = device_get_ivars(child); + struct resource_list *rl = &ad->ad_rl; + + return(resource_list_alloc(rl, bus, child, type, rid, start, end, count, flags)); +} + +static int +acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r) +{ + struct acpi_device *ad = device_get_ivars(child); + struct resource_list *rl = &ad->ad_rl; + + return(resource_list_release(rl, bus, child, type, rid, r)); +} + +/* + * Scan relevant portions of the ACPI namespace and attach child devices. + * + * Note that we only expect to find devices in the \_TZ_, \_SI_ and \_SB_ scopes, + * and \_TZ_ becomes obsolete in the ACPI 2.0 spec. + */ +static void +acpi_probe_children(device_t bus) +{ + ACPI_HANDLE parent; + static char *scopes[] = {"\\_TZ_", "\\_SI", "\\_SB_", NULL}; + int i; + + /* + * Create any static children by calling device identify methods. + */ + bus_generic_probe(bus); + + /* + * Scan the namespace and insert placeholders for all the devices that + * we find. + * + * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because + * we want to create nodes for all devices, not just those that are currently + * present. (This assumes that we don't want to create/remove devices as they + * appear, which might be smarter.) + */ + for (i = 0; scopes[i] != NULL; i++) + if ((AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent)) == AE_OK) + AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child, bus, NULL); + + /* + * Scan all of the child devices we have created and let them probe/attach. + */ + bus_generic_attach(bus); + + /* + * Some of these children may have attached others as part of their attach + * process (eg. the root PCI bus driver), so rescan. + */ + bus_generic_attach(bus); +} + +/* + * Evaluate a child device and determine whether we might attach a device to + * it. + */ +static ACPI_STATUS +acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) +{ + ACPI_OBJECT_TYPE type; + device_t child, bus = (device_t)context; + + if (AcpiGetType(handle, &type) == AE_OK) { + switch(type) { + case ACPI_TYPE_DEVICE: + case ACPI_TYPE_PROCESSOR: + case ACPI_TYPE_THERMAL: + case ACPI_TYPE_POWER: + /* + * Create a placeholder device for this node. Sort the placeholder + * so that the probe/attach passes will run breadth-first. + */ + child = BUS_ADD_CHILD(bus, level * 10, NULL, -1); + acpi_set_handle(child, handle); + } + } + return(AE_OK); +} + +static void +acpi_shutdown_pre_sync(void *arg, int howto) +{ + /* + * disable all of ACPI events before soft off, otherwise the system + * will be turned on again on some laptops. + * + * XXX this should probably be restricted to masking some events just + * before powering down, since we may still need ACPI during the + * shutdown process. + */ + acpi_Disable((struct acpi_softc *)arg); +} + +static void +acpi_shutdown_final(void *arg, int howto) +{ + ACPI_STATUS status; + + if (howto == RB_POWEROFF) { + printf("Power system off using ACPI...\n"); + if ((status = AcpiSetSystemSleepState(ACPI_STATE_S5)) != AE_OK) { + printf("ACPI power-off failed - %s\n", acpi_strerror(status)); + } else { + DELAY(1000000); + printf("ACPI power-off failed - timeout\n"); + } + } +} + +/* + * Match a HID string against a device + */ +BOOLEAN +acpi_MatchHid(device_t dev, char *hid) +{ + ACPI_HANDLE h; + ACPI_DEVICE_INFO devinfo; + ACPI_STATUS error; + + if ((hid == NULL) || (strlen(hid) != 7)) + return(FALSE); + if ((h = acpi_get_handle(dev)) == NULL) + return(FALSE); + if ((error = AcpiGetObjectInfo(h, &devinfo)) != AE_OK) + return(FALSE); + if ((devinfo.Valid & ACPI_VALID_HID) && !strncmp(hid, devinfo.HardwareId, 7)) + return(TRUE); + return(FALSE); +} + +/* + * Perform the tedious double-get procedure required for fetching something into + * an ACPI_BUFFER that has not been initialised. + */ +ACPI_STATUS +acpi_GetIntoBuffer(ACPI_HANDLE handle, ACPI_STATUS (*func)(ACPI_HANDLE, ACPI_BUFFER *), ACPI_BUFFER *buf) +{ + ACPI_STATUS status; + + buf->Length = 0; + buf->Pointer = NULL; + + if ((status = func(handle, buf)) != AE_BUFFER_OVERFLOW) + return(status); + if ((buf->Pointer = AcpiOsCallocate(buf->Length)) == NULL) + return(AE_NO_MEMORY); + return(func(handle, buf)); +} + +/* + * Allocate a buffer with a preset data size. + */ +ACPI_BUFFER * +acpi_AllocBuffer(int size) +{ + ACPI_BUFFER *buf; + + if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) + return(NULL); + buf->Length = size; + buf->Pointer = (void *)(buf + 1); + return(buf); +} + +/* + * Set the system sleep state + * + * Currently we only support S1 and S5 + */ +ACPI_STATUS +acpi_SetSleepState(struct acpi_softc *sc, int state) +{ + ACPI_STATUS status = AE_OK; + + switch (state) { + case ACPI_STATE_S0: /* XXX only for testing */ + status = AcpiSetSystemSleepState((UINT8)state); + if (status != AE_OK) { + device_printf(sc->acpi_dev, "AcpiSetSystemSleepState failed - %s\n", acpi_strerror(status)); + } + break; + + case ACPI_STATE_S1: + /* + * Inform all devices that we are going to sleep. + */ + if (DEVICE_SUSPEND(root_bus) != 0) { + /* + * Re-wake the system. + * + * XXX note that a better two-pass approach with a 'veto' pass + * followed by a "real thing" pass would be better, but the + * current bus interface does not provide for this. + */ + DEVICE_RESUME(root_bus); + return(AE_ERROR); + } + sc->acpi_sstate = state; + status = AcpiSetSystemSleepState((UINT8)state); + if (status != AE_OK) { + device_printf(sc->acpi_dev, "AcpiSetSystemSleepState failed - %s\n", acpi_strerror(status)); + } + DEVICE_RESUME(root_bus); + sc->acpi_sstate = ACPI_STATE_S0; + break; + + case ACPI_STATE_S5: + /* + * Shut down cleanly and power off. This will call us back through the + * shutdown handlers. + */ + shutdown_nice(RB_POWEROFF); + break; + + default: + status = AE_BAD_PARAMETER; + break; + } + return(status); +} + +/* + * Enable/Disable ACPI + */ +ACPI_STATUS +acpi_Enable(struct acpi_softc *sc) +{ + ACPI_STATUS status; + u_int32_t flags; + + flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT | + ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; + if (!sc->acpi_enabled) { + status = AcpiEnableSubsystem(flags); + } else { + status = AE_OK; + } + if (status == AE_OK) + sc->acpi_enabled = 1; + return(status); +} + +ACPI_STATUS +acpi_Disable(struct acpi_softc *sc) +{ + ACPI_STATUS status; + + if (sc->acpi_enabled) { + status = AcpiDisable(); + } else { + status = AE_OK; + } + if (status == AE_OK) + sc->acpi_enabled = 0; + return(status); +} + +/* + * Returns true if the device is actually present and should + * be attached to. This requires the present, enabled, UI-visible + * and diagnostics-passed bits to be set. + */ +BOOLEAN +acpi_DeviceIsPresent(device_t dev) +{ + ACPI_HANDLE h; + ACPI_DEVICE_INFO devinfo; + ACPI_STATUS error; + + if ((h = acpi_get_handle(dev)) == NULL) + return(FALSE); + if ((error = AcpiGetObjectInfo(h, &devinfo)) != AE_OK) + return(FALSE); + if ((devinfo.Valid & ACPI_VALID_HID) && (devinfo.CurrentStatus & 0xf)) + return(TRUE); + return(FALSE); +} + +/* + * Evaluate a path that should return a number + */ +ACPI_STATUS +acpi_EvaluateNumber(ACPI_HANDLE handle, char *path, int *number) +{ + ACPI_STATUS error; + ACPI_BUFFER buf; + int param[4]; + + if (handle == NULL) + handle = ACPI_ROOT_OBJECT; + buf.Pointer = ¶m[0]; + buf.Length = sizeof(param); + if ((error = AcpiEvaluateObject(handle, path, NULL, &buf)) == AE_OK) { + if (param[0] == ACPI_TYPE_NUMBER) { + *number = param[1]; + } else { + error = AE_TYPE; + } + } + return(error); +} + +/* + * ACPI Event Handlers + */ + +/* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ + +static void +acpi_system_eventhandler_sleep(void *arg, int state) +{ + if (state < ACPI_STATE_S0 || state > ACPI_STATE_S5) { + return; + } + + acpi_SetSleepState((struct acpi_softc *)arg, state); +} + + +static void +acpi_system_eventhandler_wakeup(void *arg, int state) +{ + /* Well, what to do? :-) */ +} + +/* + * ACPICA Event Handlers (FixedEvent, also called from button notify handler) + */ +UINT32 +acpi_eventhandler_power_button_for_sleep(void *context) +{ + struct acpi_softc *sc = (struct acpi_softc *)context; + + EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); + return(INTERRUPT_HANDLED); +} + +UINT32 +acpi_eventhandler_power_button_for_wakeup(void *context) +{ + struct acpi_softc *sc = (struct acpi_softc *)context; + + EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); + return(INTERRUPT_HANDLED); +} + +UINT32 +acpi_eventhandler_sleep_button_for_sleep(void *context) +{ + struct acpi_softc *sc = (struct acpi_softc *)context; + + EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); + return(INTERRUPT_HANDLED); +} + +UINT32 +acpi_eventhandler_sleep_button_for_wakeup(void *context) +{ + struct acpi_softc *sc = (struct acpi_softc *)context; + + EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); + return(INTERRUPT_HANDLED); +} + +/* + * XXX This is kinda ugly, and should not be here. + */ +struct acpi_staticbuf { + ACPI_BUFFER buffer; + char data[512]; +}; + +char * +acpi_strerror(ACPI_STATUS excep) +{ + static struct acpi_staticbuf buf; + + buf.buffer.Length = 512; + buf.buffer.Pointer = &buf.data[0]; + + if (AcpiFormatException(excep, &buf.buffer) == AE_OK) + return(buf.buffer.Pointer); + return("(error formatting exception)"); +} + +char * +acpi_name(ACPI_HANDLE handle) +{ + static struct acpi_staticbuf buf; + + buf.buffer.Length = 512; + buf.buffer.Pointer = &buf.data[0]; + + if (AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer) == AE_OK) + return(buf.buffer.Pointer); + return("(unknown path)"); +} + +/* + * Debugging/bug-avoidance. Avoid trying to fetch info on various + * parts of the namespace. + */ +int +acpi_avoid(ACPI_HANDLE handle) +{ + char *cp, *np; + int len; + + np = acpi_name(handle); + if (*np == '\\') + np++; + if ((cp = getenv("debug.acpi.avoid")) == NULL) + return(0); + + /* scan the avoid list checking for a match */ + for (;;) { + while ((*cp != 0) && isspace(*cp)) + cp++; + if (*cp == 0) + break; + len = 0; + while ((cp[len] != 0) && !isspace(cp[len])) + len++; + if (!strncmp(cp, np, len)) { + printf("avoiding '%s'\n", np); + return(1); + } + cp += len; + } + return(0); +} + +/* + * Control interface. + * + * XXX this is provided as a temporary measure for + * backwards compatibility for now. A better + * interface will probably use sysctl or similar. + */ +static int +acpiopen(dev_t dev, int flag, int fmt, struct proc * p) +{ + return(0); +} + +static int +acpiclose(dev_t dev, int flag, int fmt, struct proc * p) +{ + return(0); +} + +static int +acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc * p) +{ + int error, state; + struct acpi_softc *sc; + + error = state = 0; + sc = dev->si_drv1; + + switch (cmd) { + case ACPIIO_ENABLE: + if (ACPI_FAILURE(acpi_Enable(sc))) { + error = ENXIO; + } + break; + + case ACPIIO_DISABLE: + if (ACPI_FAILURE(acpi_Disable(sc))) { + error = ENXIO; + } + break; + + case ACPIIO_SETSLPSTATE: + if (!sc->acpi_enabled) { + error = ENXIO; + break; + } + state = *(int *)addr; + if (state >= ACPI_STATE_S0 && state <= ACPI_STATE_S5) { + acpi_SetSleepState(sc, state); + } else { + error = EINVAL; + } + + break; + + default: + error = EINVAL; + break; + } + + return(error); +} + +#ifdef ACPI_DEBUG +struct debugtag +{ + char *name; + UINT32 value; +}; + +static struct debugtag dbg_layer[] = { + {"GLOBAL", 0x00000001}, + {"COMMON", 0x00000002}, + {"PARSER", 0x00000004}, + {"DISPATCHER", 0x00000008}, + {"INTERPRETER", 0x00000010}, + {"NAMESPACE", 0x00000020}, + {"RESOURCE_MANAGER", 0x00000040}, + {"TABLE_MANAGER", 0x00000080}, + {"EVENT_HANDLING", 0x00000100}, + {"HARDWARE", 0x00000200}, + {"MISCELLANEOUS", 0x00000400}, + {"OS_DEPENDENT", 0x00000800}, + {"BUS_MANAGER", 0x00001000}, + {"PROCESSOR_CONTROL", 0x00002000}, + {"SYSTEM_CONTROL", 0x00004000}, + {"THERMAL_CONTROL", 0x00008000}, + {"POWER_CONTROL", 0x00010000}, + {"EMBEDDED_CONTROLLER", 0x00020000}, + {"BATTERY", 0x00040000}, + {"DEBUGGER", 0x00100000}, + {"ALL_COMPONENTS", 0x001FFFFF}, + {NULL, 0} +}; + +static struct debugtag dbg_level[] = { + {"ACPI_OK", 0x00000001}, + {"ACPI_INFO", 0x00000002}, + {"ACPI_WARN", 0x00000004}, + {"ACPI_ERROR", 0x00000008}, + {"ACPI_FATAL", 0x00000010}, + {"ACPI_DEBUG_OBJECT", 0x00000020}, + {"ACPI_ALL", 0x0000003F}, + {"TRACE_PARSE", 0x00000100}, + {"TRACE_DISPATCH", 0x00000200}, + {"TRACE_LOAD", 0x00000400}, + {"TRACE_EXEC", 0x00000800}, + {"TRACE_NAMES", 0x00001000}, + {"TRACE_OPREGION", 0x00002000}, + {"TRACE_BFIELD", 0x00004000}, + {"TRACE_TRASH", 0x00008000}, + {"TRACE_TABLES", 0x00010000}, + {"TRACE_FUNCTIONS", 0x00020000}, + {"TRACE_VALUES", 0x00040000}, + {"TRACE_OBJECTS", 0x00080000}, + {"TRACE_ALLOCATIONS", 0x00100000}, + {"TRACE_RESOURCES", 0x00200000}, + {"TRACE_IO", 0x00400000}, + {"TRACE_INTERRUPTS", 0x00800000}, + {"TRACE_USER_REQUESTS", 0x01000000}, + {"TRACE_PACKAGE", 0x02000000}, + {"TRACE_MUTEX", 0x04000000}, + {"TRACE_ALL", 0x0FFFFF00}, + {"VERBOSE_AML_DISASSEMBLE", 0x10000000}, + {"VERBOSE_INFO", 0x20000000}, + {"VERBOSE_TABLES", 0x40000000}, + {"VERBOSE_EVENTS", 0x80000000}, + {"VERBOSE_ALL", 0xF0000000}, + {NULL, 0} +}; + +static void +acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) +{ + char *ep; + int i, l; + + while (*cp) { + if (isspace(*cp)) { + cp++; + continue; + } + ep = cp; + while (*ep && !isspace(*ep)) + ep++; + l = ep - cp; + for (i = 0; tag[i].name != NULL; i++) { + if (!strncmp(cp, tag[i].name, l)) { + *flag |= tag[i].value; + printf("ACPI_DEBUG: set '%s'\n", tag[i].name); + } + } + cp = ep; + } +} + +static void +acpi_set_debugging(void) +{ + char *cp; + + if ((cp = getenv("debug.acpi.layer")) != NULL) + acpi_parse_debug(cp, &dbg_layer[0], &AcpiDbgLayer); + if ((cp = getenv("debug.acpi.level")) != NULL) + acpi_parse_debug(cp, &dbg_level[0], &AcpiDbgLevel); +} +#endif |
