| /* |
| * Copyright 2012, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * 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. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT |
| * OWNER 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. |
| */ |
| |
| #ifndef MOSYS_LIB_ACPI_H__ |
| #define MOSYS_LIB_ACPI_H__ |
| |
| /* Chrome OS ACPI stuff */ |
| #define CHROMEOS_ACPI_PATH "/sys/devices/platform/chromeos_acpi/" |
| #define CHROMEOS_HWID_MAXLEN 256 |
| #define CHROMEOS_FRID_MAXLEN 256 |
| |
| /* Registers from ACPI 4.0 spec */ |
| #define ACPI_EC_SC 0x66 /* ACPI command/status port */ |
| #define ACPI_EC_DATA 0x62 /* ACPI data port */ |
| |
| /* bits 2 and 7 are ignored in ACPI 4.0 spec */ |
| #define ACPI_EC_OBF (1 << 0) /* output buffer full */ |
| #define ACPI_EC_IBF (1 << 1) /* input buffer full */ |
| #define ACPI_EC_CMD (1 << 3) /* byte in data reg is command byte */ |
| #define ACPI_EC_BURST (1 << 4) /* EC in burst mode */ |
| #define ACPI_EC_SCI_EVT (1 << 5) /* SCI event pending */ |
| #define ACPI_EC_SMI_EVT (1 << 6) /* SMI event pending */ |
| |
| #define ACPI_RD_EC 0x80 /* read byte from EC address space */ |
| #define ACPI_WR_EC 0x81 /* write a byte to EC address space */ |
| #define ACPI_BE_EC 0x82 /* burst enable */ |
| #define ACPI_BD_EC 0x83 /* burst disable */ |
| #define ACPI_QR_EC 0x84 /* query EC */ |
| |
| /* forward declarations */ |
| struct platform_intf; |
| struct sensor; |
| struct sensor_reading; |
| |
| /* |
| * acpi_get_hwid - retrieve hardware ID and store in a newly allocated buffer |
| * |
| * @buf: buffer to store hardware ID in |
| * |
| * returns length of hardware id to indicate success |
| * returns <0 to indicate error |
| */ |
| extern int acpi_get_hwid(char **buf); |
| |
| /* |
| * acpi_get_frid - retrieve FRID and store in a newly allocated buffer |
| * |
| * @buf: buffer to store hardware ID in |
| * |
| * returns length of hardware id to indicate success |
| * returns <0 to indicate error |
| */ |
| extern int acpi_get_frid(char **buf); |
| |
| /* |
| * acpi_read_temp - read ACPI thermal_zone temperature |
| * |
| * @intf: platform interface |
| * @sensor: sensor struct |
| * @reading: location to store reading |
| * |
| * returns 0 to indicate success |
| * returns <0 to indicate failure |
| */ |
| extern int acpi_read_temp(struct platform_intf *intf, struct sensor *sensor, |
| struct sensor_reading *reading); |
| |
| #endif /* MOSYS_LIB_ACPI_H__ */ |
