/*- * Copyright (c) 2009 Michael Gmelin * 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: src/sys/dev/acpi_support/acpi_wmi.c,v 1.9 2011/11/22 21:28:20 marius Exp $ */ /* * Driver for acpi-wmi mapping, provides an interface for vendor specific * implementations (e.g. HP and Acer laptops). * Inspired by the ACPI-WMI mapping driver (c) 2008-2008 Carlos Corbacho which * implements this functionality for Linux. * * WMI and ACPI: http://www.microsoft.com/whdc/system/pnppwr/wmi/wmi-acpi.mspx * acpi-wmi for Linux: http://www.kernel.org */ #include "opt_acpi.h" #include #include #include #include #include #include #include #include #include #include #include "acpi.h" #include "accommon.h" #include #include "acpi_wmi_if.h" static MALLOC_DEFINE(M_ACPIWMI, "acpiwmi", "ACPI-WMI mapping"); #define _COMPONENT ACPI_OEM ACPI_MODULE_NAME("ACPI_WMI"); #define ACPI_WMI_REGFLAG_EXPENSIVE 0x1 /* GUID flag: Expensive operation */ #define ACPI_WMI_REGFLAG_METHOD 0x2 /* GUID flag: Method call */ #define ACPI_WMI_REGFLAG_STRING 0x4 /* GUID flag: String */ #define ACPI_WMI_REGFLAG_EVENT 0x8 /* GUID flag: Event */ /* * acpi_wmi driver private structure */ struct acpi_wmi_softc { device_t wmi_dev; /* wmi device id */ ACPI_HANDLE wmi_handle; /* handle of the PNP0C14 node */ device_t ec_dev; /* acpi_ec0 */ struct cdev *wmistat_dev_t; /* wmistat device handle */ struct sbuf wmistat_sbuf; /* sbuf for /dev/wmistat output */ pid_t wmistat_open_pid; /* pid operating on /dev/wmistat */ int wmistat_bufptr; /* /dev/wmistat ptr to buffer position */ }; /* * Struct that holds information about * about a single GUID entry in _WDG */ struct guid_info { char guid[16]; /* 16 byte non human readable GUID */ char oid[2]; /* object id or event notify id (first byte) */ UINT8 max_instance; /* highest instance known for this GUID */ UINT8 flags; /* ACPI_WMI_REGFLAG_%s */ }; /* WExx event generation state (on/off) */ enum event_generation_state { EVENT_GENERATION_ON = 1, EVENT_GENERATION_OFF = 0 }; /* * Information about one entry in _WDG. * List of those is used to lookup information by GUID. */ struct wmi_info { TAILQ_ENTRY(wmi_info) wmi_list; struct guid_info ginfo; /* information on guid */ ACPI_NOTIFY_HANDLER event_handler;/* client provided event handler */ void *event_handler_user_data; /* ev handler cookie */ }; TAILQ_HEAD(wmi_info_list_head, wmi_info) wmi_info_list = TAILQ_HEAD_INITIALIZER(wmi_info_list); ACPI_SERIAL_DECL(acpi_wmi, "ACPI-WMI Mapping"); /* public interface - declaration */ /* standard device interface*/ static int acpi_wmi_probe(device_t dev); static int acpi_wmi_attach(device_t dev); static int acpi_wmi_detach(device_t dev); /* see acpi_wmi_if.m */ static int acpi_wmi_provides_guid_string_method(device_t dev, const char *guid_string); static ACPI_STATUS acpi_wmi_evaluate_call_method(device_t dev, const char *guid_string, UINT8 instance, UINT32 method_id, const ACPI_BUFFER *in, ACPI_BUFFER *out); static ACPI_STATUS acpi_wmi_install_event_handler_method(device_t dev, const char *guid_string, ACPI_NOTIFY_HANDLER handler, void *data); static ACPI_STATUS acpi_wmi_remove_event_handler_method(device_t dev, const char *guid_string); static ACPI_STATUS acpi_wmi_get_event_data_method(device_t dev, UINT32 event_id, ACPI_BUFFER *out); static ACPI_STATUS acpi_wmi_get_block_method(device_t dev, const char *guid_string, UINT8 instance, ACPI_BUFFER *out); static ACPI_STATUS acpi_wmi_set_block_method(device_t dev, const char *guid_string, UINT8 instance, const ACPI_BUFFER *in); /* private interface - declaration */ /* callbacks */ static void acpi_wmi_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context); static ACPI_STATUS acpi_wmi_ec_handler(UINT32 function, ACPI_PHYSICAL_ADDRESS address, UINT32 width, UINT64 *value, void *context, void *region_context); /* helpers */ static ACPI_STATUS acpi_wmi_read_wdg_blocks(ACPI_HANDLE h); static ACPI_STATUS acpi_wmi_toggle_we_event_generation(device_t dev, struct wmi_info *winfo, enum event_generation_state state); static int acpi_wmi_guid_string_to_guid(const UINT8 *guid_string, UINT8 *guid); static struct wmi_info* acpi_wmi_lookup_wmi_info_by_guid_string( const char *guid_string); static d_open_t acpi_wmi_wmistat_open; static d_close_t acpi_wmi_wmistat_close; static d_read_t acpi_wmi_wmistat_read; /* handler /dev/wmistat device */ static struct dev_ops wmistat_ops = { { .name = "wmistat" }, .d_open = acpi_wmi_wmistat_open, .d_close = acpi_wmi_wmistat_close, .d_read = acpi_wmi_wmistat_read, }; static device_method_t acpi_wmi_methods[] = { /* Device interface */ DEVMETHOD(device_probe, acpi_wmi_probe), DEVMETHOD(device_attach, acpi_wmi_attach), DEVMETHOD(device_detach, acpi_wmi_detach), /* bus interface */ DEVMETHOD(bus_add_child, bus_generic_add_child), /* acpi_wmi interface */ DEVMETHOD(acpi_wmi_provides_guid_string, acpi_wmi_provides_guid_string_method), DEVMETHOD(acpi_wmi_evaluate_call, acpi_wmi_evaluate_call_method), DEVMETHOD(acpi_wmi_install_event_handler, acpi_wmi_install_event_handler_method), DEVMETHOD(acpi_wmi_remove_event_handler, acpi_wmi_remove_event_handler_method), DEVMETHOD(acpi_wmi_get_event_data, acpi_wmi_get_event_data_method), DEVMETHOD(acpi_wmi_get_block, acpi_wmi_get_block_method), DEVMETHOD(acpi_wmi_set_block, acpi_wmi_set_block_method), {0, 0} }; static driver_t acpi_wmi_driver = { "acpi_wmi", acpi_wmi_methods, sizeof(struct acpi_wmi_softc), }; static devclass_t acpi_wmi_devclass; DRIVER_MODULE(acpi_wmi, acpi, acpi_wmi_driver, acpi_wmi_devclass, 0, 0); MODULE_VERSION(acpi_wmi, 1); MODULE_DEPEND(acpi_wmi, acpi, 1, 1, 1); static char *wmi_ids[] = {"PNP0C14", NULL}; /* * Probe for the PNP0C14 ACPI node */ static int acpi_wmi_probe(device_t dev) { if (acpi_disabled("wmi") || ACPI_ID_PROBE(device_get_parent(dev), dev, wmi_ids) == NULL) return (ENXIO); device_set_desc(dev, "ACPI-WMI mapping"); return (0); } /* * Attach the device by: * - Looking for the first ACPI EC device * - Install the notify handler * - Install the EC address space handler * - Look for the _WDG node and read GUID information blocks */ static int acpi_wmi_attach(device_t dev) { struct acpi_wmi_softc *sc; int ret; ACPI_STATUS status; ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); sc = device_get_softc(dev); ret = ENXIO; ACPI_SERIAL_BEGIN(acpi_wmi); sc->wmi_dev = dev; sc->wmi_handle = acpi_get_handle(dev); TAILQ_INIT(&wmi_info_list); /* XXX Only works with one EC, but nearly all systems only have one. */ if ((sc->ec_dev = devclass_get_device(devclass_find("acpi_ec"), 0)) == NULL) device_printf(dev, "cannot find EC device\n"); else if (ACPI_FAILURE((status = AcpiInstallNotifyHandler(sc->wmi_handle, ACPI_DEVICE_NOTIFY, acpi_wmi_notify_handler, sc)))) device_printf(sc->wmi_dev, "couldn't install notify handler - %s\n", AcpiFormatException(status)); else if (ACPI_FAILURE((status = AcpiInstallAddressSpaceHandler( sc->wmi_handle, ACPI_ADR_SPACE_EC, acpi_wmi_ec_handler, NULL, sc)))) { device_printf(sc->wmi_dev, "couldn't install EC handler - %s\n", AcpiFormatException(status)); AcpiRemoveNotifyHandler(sc->wmi_handle, ACPI_DEVICE_NOTIFY, acpi_wmi_notify_handler); } else if (ACPI_FAILURE((status = acpi_wmi_read_wdg_blocks( sc->wmi_handle)))) { device_printf(sc->wmi_dev, "couldn't parse _WDG - %s\n", AcpiFormatException(status)); AcpiRemoveNotifyHandler(sc->wmi_handle, ACPI_DEVICE_NOTIFY, acpi_wmi_notify_handler); AcpiRemoveAddressSpaceHandler(sc->wmi_handle, ACPI_ADR_SPACE_EC, acpi_wmi_ec_handler); } else { sc->wmistat_dev_t = make_dev(&wmistat_ops, 0, UID_ROOT, GID_WHEEL, 0644, "wmistat%d", device_get_unit(dev)); sc->wmistat_dev_t->si_drv1 = sc; sc->wmistat_open_pid = 0; sc->wmistat_bufptr = -1; ret = 0; } ACPI_SERIAL_END(acpi_wmi); if (ret == 0) { bus_generic_probe(dev); ret = bus_generic_attach(dev); } return (ret); } /* * Detach the driver by: * - Removing notification handler * - Removing address space handler * - Turning off event generation for all WExx event activated by * child drivers */ static int acpi_wmi_detach(device_t dev) { struct wmi_info *winfo, *tmp; struct acpi_wmi_softc *sc; int ret; ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); sc = device_get_softc(dev); ACPI_SERIAL_BEGIN(acpi_wmi); if (sc->wmistat_open_pid != 0) { ret = EBUSY; } else { AcpiRemoveNotifyHandler(sc->wmi_handle, ACPI_DEVICE_NOTIFY, acpi_wmi_notify_handler); AcpiRemoveAddressSpaceHandler(sc->wmi_handle, ACPI_ADR_SPACE_EC, acpi_wmi_ec_handler); TAILQ_FOREACH_MUTABLE(winfo, &wmi_info_list, wmi_list, tmp) { if (winfo->event_handler) acpi_wmi_toggle_we_event_generation(dev, winfo, EVENT_GENERATION_OFF); TAILQ_REMOVE(&wmi_info_list, winfo, wmi_list); kfree(winfo, M_ACPIWMI); } if (sc->wmistat_bufptr != -1) { sbuf_delete(&sc->wmistat_sbuf); sc->wmistat_bufptr = -1; } sc->wmistat_open_pid = 0; destroy_dev(sc->wmistat_dev_t); ret = 0; } ACPI_SERIAL_END(acpi_wmi); return (ret); } /* * Check if the given GUID string (human readable format * AABBCCDD-EEFF-GGHH-IIJJ-KKLLMMNNOOPP) * exists within _WDG */ static int acpi_wmi_provides_guid_string_method(device_t dev, const char *guid_string) { struct wmi_info *winfo; int ret; ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); ACPI_SERIAL_BEGIN(acpi_wmi); winfo = acpi_wmi_lookup_wmi_info_by_guid_string(guid_string); ret = (winfo == NULL)?0:winfo->ginfo.max_instance+1; ACPI_SERIAL_END(acpi_wmi); return (ret); } /* * Call a method "method_id" on the given GUID block * write result into user provided output buffer */ static ACPI_STATUS acpi_wmi_evaluate_call_method(device_t dev, const char *guid_string, UINT8 instance, UINT32 method_id, const ACPI_BUFFER *in, ACPI_BUFFER *out) { ACPI_OBJECT params[3]; ACPI_OBJECT_LIST input; char method[5] = "WMxx"; struct wmi_info *winfo; struct acpi_wmi_softc *sc; ACPI_STATUS status; ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); sc = device_get_softc(dev); ACPI_SERIAL_BEGIN(acpi_wmi); if ((winfo = acpi_wmi_lookup_wmi_info_by_guid_string(guid_string)) == NULL) status = AE_NOT_FOUND; else if (!(winfo->ginfo.flags & ACPI_WMI_REGFLAG_METHOD)) status = AE_BAD_DATA; else if (instance > winfo->ginfo.max_instance) status = AE_BAD_PARAMETER; else { params[0].Type = ACPI_TYPE_INTEGER; params[0].Integer.Value = instance; params[1].Type = ACPI_TYPE_INTEGER; params[1].Integer.Value = method_id; input.Pointer = params; input.Count = 2; if (in) { params[2].Type = (winfo->ginfo.flags & ACPI_WMI_REGFLAG_STRING) ?ACPI_TYPE_STRING:ACPI_TYPE_BUFFER; params[2].Buffer.Length = in->Length; params[2].Buffer.Pointer = in->Pointer; input.Count = 3; } method[2] = winfo->ginfo.oid[0]; method[3] = winfo->ginfo.oid[1]; status = AcpiEvaluateObject(sc->wmi_handle, method, &input, out); } ACPI_SERIAL_END(acpi_wmi); return (status); } /* * Install a user provided event_handler on the given GUID * provided *data will be passed on callback * If there is already an existing event handler registered it will be silently * discarded */ static ACPI_STATUS acpi_wmi_install_event_handler_method(device_t dev, const char *guid_string, ACPI_NOTIFY_HANDLER event_handler, void *data) { struct wmi_info *winfo; ACPI_STATUS status; ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); status = AE_OK; ACPI_SERIAL_BEGIN(acpi_wmi); if (guid_string == NULL || event_handler == NULL) status = AE_BAD_PARAMETER; else if ((winfo = acpi_wmi_lookup_wmi_info_by_guid_string(guid_string)) == NULL) status = AE_NOT_EXIST; else if (winfo->event_handler != NULL || (status = acpi_wmi_toggle_we_event_generation(dev, winfo, EVENT_GENERATION_ON)) == AE_OK) { winfo->event_handler = event_handler; winfo->event_handler_user_data = data; } ACPI_SERIAL_END(acpi_wmi); return (status); } /* * Remove a previously installed event handler from the given GUID * If there was none installed, this call is silently discarded and * reported as AE_OK */ static ACPI_STATUS acpi_wmi_remove_event_handler_method(device_t dev, const char *guid_string) { struct wmi_info *winfo; ACPI_STATUS status; ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); status = AE_OK; ACPI_SERIAL_BEGIN(acpi_wmi); if (guid_string && (winfo = acpi_wmi_lookup_wmi_info_by_guid_string(guid_string)) != NULL && winfo->event_handler) { status = acpi_wmi_toggle_we_event_generation(dev, winfo, EVENT_GENERATION_OFF); winfo->event_handler = NULL; winfo->event_handler_user_data = NULL; } ACPI_SERIAL_END(acpi_wmi); return (status); } /* * Get details on an event received through a callback registered * through ACPI_WMI_REMOVE_EVENT_HANDLER into a user provided output buffer. * (event_id equals "notify" passed in the callback) */ static ACPI_STATUS acpi_wmi_get_event_data_method(device_t dev, UINT32 event_id, ACPI_BUFFER *out) { ACPI_OBJECT_LIST input; ACPI_OBJECT params[1]; struct acpi_wmi_softc *sc; struct wmi_info *winfo; ACPI_STATUS status; ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); sc = device_get_softc(dev); status = AE_NOT_FOUND; ACPI_SERIAL_BEGIN(acpi_wmi); params[0].Type = ACPI_TYPE_INTEGER; params[0].Integer.Value = event_id; input.Pointer = params; input.Count = 1; TAILQ_FOREACH(winfo, &wmi_info_list, wmi_list) { if ((winfo->ginfo.flags & ACPI_WMI_REGFLAG_EVENT) && ((UINT8) winfo->ginfo.oid[0] == event_id)) { status = AcpiEvaluateObject(sc->wmi_handle, "_WED", &input, out); break; } } ACPI_SERIAL_END(acpi_wmi); return (status); } /* * Read a block of data from the given GUID (using WQxx (query)) * Will be returned in a user provided buffer (out). * If the method is marked as expensive (ACPI_WMI_REGFLAG_EXPENSIVE) * we will first call the WCxx control method to lock the node to * lock the node for data collection and release it afterwards. * (Failed WCxx calls are ignored to "support" broken implementations) */ static ACPI_STATUS acpi_wmi_get_block_method(device_t dev, const char *guid_string, UINT8 instance, ACPI_BUFFER *out) { char wc_method[5] = "WCxx"; char wq_method[5] = "WQxx"; ACPI_OBJECT_LIST wc_input; ACPI_OBJECT_LIST wq_input; ACPI_OBJECT wc_params[1]; ACPI_OBJECT wq_params[1]; ACPI_HANDLE wc_handle; struct acpi_wmi_softc *sc; struct wmi_info *winfo; ACPI_STATUS status; ACPI_STATUS wc_status; ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); sc = device_get_softc(dev); wc_status = AE_ERROR; ACPI_SERIAL_BEGIN(acpi_wmi); if (guid_string == NULL || out == NULL) status = AE_BAD_PARAMETER; else if ((winfo = acpi_wmi_lookup_wmi_info_by_guid_string(guid_string)) == NULL) status = AE_ERROR; else if (instance > winfo->ginfo.max_instance) status = AE_BAD_PARAMETER; else if ((winfo->ginfo.flags & ACPI_WMI_REGFLAG_EVENT) || (winfo->ginfo.flags & ACPI_WMI_REGFLAG_METHOD)) status = AE_ERROR; else { wq_params[0].Type = ACPI_TYPE_INTEGER; wq_params[0].Integer.Value = instance; wq_input.Pointer = wq_params; wq_input.Count = 1; if (winfo->ginfo.flags & ACPI_WMI_REGFLAG_EXPENSIVE) { wc_params[0].Type = ACPI_TYPE_INTEGER; wc_params[0].Integer.Value = 1; wc_input.Pointer = wc_params; wc_input.Count = 1; wc_method[2] = winfo->ginfo.oid[0]; wc_method[3] = winfo->ginfo.oid[1]; wc_status = AcpiGetHandle(sc->wmi_handle, wc_method, &wc_handle); if (ACPI_SUCCESS(wc_status)) wc_status = AcpiEvaluateObject(wc_handle, wc_method, &wc_input, NULL); } wq_method[2] = winfo->ginfo.oid[0]; wq_method[3] = winfo->ginfo.oid[1]; status = AcpiEvaluateObject(sc->wmi_handle, wq_method, &wq_input, out); if ((winfo->ginfo.flags & ACPI_WMI_REGFLAG_EXPENSIVE) && ACPI_SUCCESS(wc_status)) { wc_params[0].Integer.Value = 0; status = AcpiEvaluateObject(wc_handle, wc_method, &wc_input, NULL); /* XXX this might be the wrong status to return? */ } } ACPI_SERIAL_END(acpi_wmi); return (status); } /* * Write a block of data to the given GUID (using WSxx) */ static ACPI_STATUS acpi_wmi_set_block_method(device_t dev, const char *guid_string, UINT8 instance, const ACPI_BUFFER *in) { char method[5] = "WSxx"; ACPI_OBJECT_LIST input; ACPI_OBJECT params[2]; struct wmi_info *winfo; struct acpi_wmi_softc *sc; ACPI_STATUS status; ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); sc = device_get_softc(dev); ACPI_SERIAL_BEGIN(acpi_wmi); if (guid_string == NULL || in == NULL) status = AE_BAD_DATA; else if ((winfo = acpi_wmi_lookup_wmi_info_by_guid_string(guid_string)) == NULL) status = AE_ERROR; else if (instance > winfo->ginfo.max_instance) status = AE_BAD_PARAMETER; else if ((winfo->ginfo.flags & ACPI_WMI_REGFLAG_EVENT) || (winfo->ginfo.flags & ACPI_WMI_REGFLAG_METHOD)) status = AE_ERROR; else { params[0].Type = ACPI_TYPE_INTEGER; params[0].Integer.Value = instance; input.Pointer = params; input.Count = 2; params[1].Type = (winfo->ginfo.flags & ACPI_WMI_REGFLAG_STRING) ?ACPI_TYPE_STRING:ACPI_TYPE_BUFFER; params[1].Buffer.Length = in->Length; params[1].Buffer.Pointer = in->Pointer; method[2] = winfo->ginfo.oid[0]; method[3] = winfo->ginfo.oid[1]; status = AcpiEvaluateObject(sc->wmi_handle, method, &input, NULL); } ACPI_SERIAL_END(acpi_wmi); return (status); } /* * Handle events received and dispatch them to * stakeholders that registered through ACPI_WMI_INSTALL_EVENT_HANDLER */ static void acpi_wmi_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) { ACPI_NOTIFY_HANDLER handler; void *handler_data; struct wmi_info *winfo; ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify); handler = NULL; handler_data = NULL; ACPI_SERIAL_BEGIN(acpi_wmi); TAILQ_FOREACH(winfo, &wmi_info_list, wmi_list) { if ((winfo->ginfo.flags & ACPI_WMI_REGFLAG_EVENT) && ((UINT8) winfo->ginfo.oid[0] == notify)) { if (winfo->event_handler) { handler = winfo->event_handler; handler_data = winfo->event_handler_user_data; break; } } } ACPI_SERIAL_END(acpi_wmi); if (handler) { handler(h, notify, handler_data); } } /* * Handle EC address space notifications reveived on the WDG node * (this mimics EcAddressSpaceHandler in acpi_ec.c) */ static ACPI_STATUS acpi_wmi_ec_handler(UINT32 function, ACPI_PHYSICAL_ADDRESS address, UINT32 width, UINT64 *value, void *context, void *region_context) { struct acpi_wmi_softc *sc; int i; UINT64 ec_data; UINT8 ec_addr; ACPI_STATUS status; ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, (UINT32)address); sc = (struct acpi_wmi_softc *)context; if (width % 8 != 0 || value == NULL || context == NULL) return (AE_BAD_PARAMETER); if (address + (width / 8) - 1 > 0xFF) return (AE_BAD_ADDRESS); if (function == ACPI_READ) *value = 0; ec_addr = address; status = AE_ERROR; for (i = 0; i < width; i += 8, ++ec_addr) { switch (function) { case ACPI_READ: status = ACPI_EC_READ(sc->ec_dev, ec_addr, &ec_data, 1); if (ACPI_SUCCESS(status)) *value |= ((UINT64)ec_data) << i; break; case ACPI_WRITE: ec_data = (UINT8)((*value) >> i); status = ACPI_EC_WRITE(sc->ec_dev, ec_addr, ec_data, 1); break; default: device_printf(sc->wmi_dev, "invalid acpi_wmi_ec_handler function %d\n", function); status = AE_BAD_PARAMETER; break; } if (ACPI_FAILURE(status)) break; } return (status); } /* * Read GUID blocks from the _WDG node * into wmi_info_list. */ static ACPI_STATUS acpi_wmi_read_wdg_blocks(ACPI_HANDLE h) { ACPI_BUFFER out = {ACPI_ALLOCATE_BUFFER, NULL}; struct guid_info *ginfo; ACPI_OBJECT *obj; struct wmi_info *winfo; UINT32 i; UINT32 wdg_block_count; ACPI_STATUS status; ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); ACPI_SERIAL_ASSERT(acpi_wmi); if (ACPI_FAILURE(status = AcpiEvaluateObject(h, "_WDG", NULL, &out))) return (status); obj = (ACPI_OBJECT*) out.Pointer; wdg_block_count = obj->Buffer.Length / sizeof(struct guid_info); if ((ginfo = kmalloc(obj->Buffer.Length, M_ACPIWMI, M_NOWAIT)) == NULL) { AcpiOsFree(out.Pointer); return (AE_NO_MEMORY); } memcpy(ginfo, obj->Buffer.Pointer, obj->Buffer.Length); for (i = 0; i < wdg_block_count; ++i) { if ((winfo = kmalloc(sizeof(struct wmi_info), M_ACPIWMI, M_NOWAIT | M_ZERO)) == NULL) { AcpiOsFree(out.Pointer); kfree(ginfo, M_ACPIWMI); return (AE_NO_MEMORY); } winfo->ginfo = ginfo[i]; TAILQ_INSERT_TAIL(&wmi_info_list, winfo, wmi_list); } AcpiOsFree(out.Pointer); kfree(ginfo, M_ACPIWMI); return (status); } /* * Toggle event generation in for the given GUID (passed by winfo) * Turn on to get notified (through acpi_wmi_notify_handler) if events happen * on the given GUID. */ static ACPI_STATUS acpi_wmi_toggle_we_event_generation(device_t dev, struct wmi_info *winfo, enum event_generation_state state) { char method[5] = "WExx"; ACPI_OBJECT_LIST input; ACPI_OBJECT params[1]; struct acpi_wmi_softc *sc; ACPI_STATUS status; ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); sc = device_get_softc(dev); ACPI_SERIAL_ASSERT(acpi_wmi); params[0].Type = ACPI_TYPE_INTEGER; params[0].Integer.Value = state==EVENT_GENERATION_ON?1:0; input.Pointer = params; input.Count = 1; UINT8 hi = ((UINT8) winfo->ginfo.oid[0]) >> 4; UINT8 lo = ((UINT8) winfo->ginfo.oid[0]) & 0xf; method[2] = (hi > 9 ? hi + 55: hi + 48); method[3] = (lo > 9 ? lo + 55: lo + 48); status = AcpiEvaluateObject(sc->wmi_handle, method, &input, NULL); if (status == AE_NOT_FOUND) status = AE_OK; return (status); } /* * Convert given two digit hex string (hexin) to an UINT8 referenced * by byteout. * Return != 0 if the was a problem (invalid input) */ static __inline int acpi_wmi_hex_to_int(const UINT8 *hexin, UINT8 *byteout) { unsigned int hi; unsigned int lo; hi = hexin[0]; lo = hexin[1]; if ('0' <= hi && hi <= '9') hi -= '0'; else if ('A' <= hi && hi <= 'F') hi -= ('A' - 10); else if ('a' <= hi && hi <= 'f') hi -= ('a' - 10); else return (1); if ('0' <= lo && lo <= '9') lo -= '0'; else if ('A' <= lo && lo <= 'F') lo -= ('A' - 10); else if ('a' <= lo && lo <= 'f') lo -= ('a' - 10); else return (1); *byteout = (hi << 4) + lo; return (0); } /* * Convert a human readable 36 character GUID into a 16byte * machine readable one. * The basic algorithm looks as follows: * Input: AABBCCDD-EEFF-GGHH-IIJJ-KKLLMMNNOOPP * Output: DCBAFEHGIJKLMNOP * (AA BB CC etc. represent two digit hex numbers == bytes) * Return != 0 if passed guid string is invalid */ static int acpi_wmi_guid_string_to_guid(const UINT8 *guid_string, UINT8 *guid) { static const int mapping[20] = {3, 2, 1, 0, -1, 5, 4, -1, 7, 6, -1, 8, 9, -1, 10, 11, 12, 13, 14, 15}; int i; for (i = 0; i < 20; ++i, ++guid_string) { if (mapping[i] >= 0) { if (acpi_wmi_hex_to_int(guid_string, &guid[mapping[i]])) return (-1); ++guid_string; } else if (*guid_string != '-') return (-1); } return (0); } /* * Lookup a wmi_info structure in wmi_list based on a * human readable GUID * Return NULL if the GUID is unknown in the _WDG */ static struct wmi_info* acpi_wmi_lookup_wmi_info_by_guid_string(const char *guid_string) { char guid[16]; struct wmi_info *winfo; ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); ACPI_SERIAL_ASSERT(acpi_wmi); if (!acpi_wmi_guid_string_to_guid(guid_string, guid)) { TAILQ_FOREACH(winfo, &wmi_info_list, wmi_list) { if (!memcmp(winfo->ginfo.guid, guid, 16)) { return (winfo); } } } return (NULL); } /* * open wmistat device */ static int acpi_wmi_wmistat_open(struct dev_open_args *ap) { struct cdev *dev = ap->a_head.a_dev; struct thread *td = curthread; struct acpi_wmi_softc *sc; int ret; if (dev == NULL || dev->si_drv1 == NULL) return (EBADF); sc = dev->si_drv1; ACPI_SERIAL_BEGIN(acpi_wmi); if (sc->wmistat_open_pid != 0) { ret = EBUSY; } else { if (sbuf_new(&sc->wmistat_sbuf, NULL, 4096, SBUF_AUTOEXTEND) == NULL) { ret = ENXIO; } else { sc->wmistat_open_pid = td->td_proc->p_pid; sc->wmistat_bufptr = 0; ret = 0; } } ACPI_SERIAL_END(acpi_wmi); return (ret); } /* * close wmistat device */ static int acpi_wmi_wmistat_close(struct dev_close_args *ap) { struct cdev *dev = ap->a_head.a_dev; struct acpi_wmi_softc *sc; int ret; if (dev == NULL || dev->si_drv1 == NULL) return (EBADF); sc = dev->si_drv1; ACPI_SERIAL_BEGIN(acpi_wmi); if (sc->wmistat_open_pid == 0) { ret = EBADF; } else { if (sc->wmistat_bufptr != -1) { sbuf_delete(&sc->wmistat_sbuf); sc->wmistat_bufptr = -1; } sc->wmistat_open_pid = 0; ret = 0; } ACPI_SERIAL_END(acpi_wmi); return (ret); } /* * Read from wmistat guid information */ static int acpi_wmi_wmistat_read(struct dev_read_args *ap) { struct cdev *dev = ap->a_head.a_dev; struct uio *buf = ap->a_uio; struct acpi_wmi_softc *sc; struct wmi_info *winfo; int l; int ret; UINT8* guid; if (dev == NULL || dev->si_drv1 == NULL) return (EBADF); sc = dev->si_drv1; ACPI_SERIAL_BEGIN(acpi_wmi); if (sc->wmistat_open_pid != buf->uio_td->td_proc->p_pid || sc->wmistat_bufptr == -1) { ret = EBADF; } else { if (!sbuf_done(&sc->wmistat_sbuf)) { sbuf_printf(&sc->wmistat_sbuf, "GUID " " INST EXPE METH STR " "EVENT OID\n"); TAILQ_FOREACH(winfo, &wmi_info_list, wmi_list) { guid = (UINT8*)winfo->ginfo.guid; sbuf_printf(&sc->wmistat_sbuf, "{%02X%02X%02X%02X-%02X%02X-" "%02X%02X-%02X%02X-%02X%02X" "%02X%02X%02X%02X} %3d %-5s", guid[3], guid[2], guid[1], guid[0], guid[5], guid[4], guid[7], guid[6], guid[8], guid[9], guid[10], guid[11], guid[12], guid[13], guid[14], guid[15], winfo->ginfo.max_instance, (winfo->ginfo.flags& ACPI_WMI_REGFLAG_EXPENSIVE)? "YES":"NO" ); if (winfo->ginfo.flags&ACPI_WMI_REGFLAG_METHOD) sbuf_printf(&sc->wmistat_sbuf, "WM%c%c ", winfo->ginfo.oid[0], winfo->ginfo.oid[1]); else sbuf_printf(&sc->wmistat_sbuf, "NO "); sbuf_printf(&sc->wmistat_sbuf, "%-4s", (winfo->ginfo.flags& ACPI_WMI_REGFLAG_STRING)?"YES":"NO" ); if (winfo->ginfo.flags&ACPI_WMI_REGFLAG_EVENT) sbuf_printf(&sc->wmistat_sbuf, "0x%02X%s -\n", (UINT8)winfo->ginfo.oid[0], winfo->event_handler==NULL? " ":"+"); else sbuf_printf(&sc->wmistat_sbuf, "NO %c%c\n", winfo->ginfo.oid[0], winfo->ginfo.oid[1]); } sbuf_finish(&sc->wmistat_sbuf); } if (sbuf_len(&sc->wmistat_sbuf) <= 0) { sbuf_delete(&sc->wmistat_sbuf); sc->wmistat_bufptr = -1; sc->wmistat_open_pid = 0; ret = ENOMEM; } else { l = min(buf->uio_resid, sbuf_len(&sc->wmistat_sbuf) - sc->wmistat_bufptr); ret = (l > 0)?uiomove(sbuf_data(&sc->wmistat_sbuf) + sc->wmistat_bufptr, l, buf) : 0; sc->wmistat_bufptr += l; } } ACPI_SERIAL_END(acpi_wmi); return (ret); }