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7ce63a09f9
Support both old and new ioctl formats at the same time. Auto-detect the ioctl format used by the kernel. BUG=chromium:481710 BRANCH=None TEST=Work on Samus with kernel 4.4 and 3.8/3.14/3.18 Change-Id: I31d7ce5b517b4b5af8e2b617e386c3cfd3276f20 Signed-off-by: Guenter Roeck <groeck@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/331830 Tested-by: Shawn N <shawnn@chromium.org> Reviewed-by: Gwendal Grignou <gwendal@chromium.org>
90 lines
2.6 KiB
C
90 lines
2.6 KiB
C
/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef __UTIL_CROS_EC_DEV_H
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#define __UTIL_CROS_EC_DEV_H
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#include <linux/ioctl.h>
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#include <linux/types.h>
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#include "include/ec_commands.h"
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#define CROS_EC_DEV_NAME "cros_ec"
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#define CROS_EC_DEV_VERSION "1.0.0"
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/*
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* @version: Command version number (often 0)
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* @command: Command to send (EC_CMD_...)
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* @outdata: Outgoing data to EC
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* @outsize: Outgoing length in bytes
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* @indata: Where to put the incoming data from EC
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* @insize: On call, how much we can accept. On return, how much we got.
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* @result: EC's response to the command (separate from communication failure)
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* ioctl returns zero on success, negative on error
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*/
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struct cros_ec_command {
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uint32_t version;
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uint32_t command;
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uint8_t *outdata;
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uint32_t outsize;
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uint8_t *indata;
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uint32_t insize;
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uint32_t result;
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};
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/*
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* @offset: within EC_LPC_ADDR_MEMMAP region
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* @bytes: number of bytes to read. zero means "read a string" (including '\0')
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* (at most only EC_MEMMAP_SIZE bytes can be read)
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* @buffer: where to store the result
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* ioctl returns the number of bytes read, negative on error
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*/
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struct cros_ec_readmem {
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uint32_t offset;
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uint32_t bytes;
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char *buffer;
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};
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#define CROS_EC_DEV_IOC ':'
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#define CROS_EC_DEV_IOCXCMD _IOWR(':', 0, struct cros_ec_command)
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#define CROS_EC_DEV_IOCRDMEM _IOWR(':', 1, struct cros_ec_readmem)
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/*
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* @version: Command version number (often 0)
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* @command: Command to send (EC_CMD_...)
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* @outsize: Outgoing length in bytes
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* @insize: Max number of bytes to accept from EC
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* @result: EC's response to the command (separate from communication failure)
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* @data: Where to put the incoming data from EC and outgoing data to EC
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*/
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struct cros_ec_command_v2 {
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uint32_t version;
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uint32_t command;
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uint32_t outsize;
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uint32_t insize;
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uint32_t result;
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uint8_t data[0];
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};
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/*
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* @offset: within EC_LPC_ADDR_MEMMAP region
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* @bytes: number of bytes to read. zero means "read a string" (including '\0')
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* (at most only EC_MEMMAP_SIZE bytes can be read)
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* @buffer: where to store the result
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* ioctl returns the number of bytes read, negative on error
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*/
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struct cros_ec_readmem_v2 {
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uint32_t offset;
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uint32_t bytes;
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uint8_t buffer[EC_MEMMAP_SIZE];
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};
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#define CROS_EC_DEV_IOC_V2 0xEC
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#define CROS_EC_DEV_IOCXCMD_V2 _IOWR(CROS_EC_DEV_IOC_V2, 0, \
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struct cros_ec_command_v2)
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#define CROS_EC_DEV_IOCRDMEM_V2 _IOWR(CROS_EC_DEV_IOC_V2, 1, \
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struct cros_ec_readmem_v2)
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#endif /* __UTIL_CROS_EC_DEV_H */
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