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/* Copyright 2015 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "byteorder.h"
#include "console.h"
#include "extension.h"
#include "link_defs.h"
#define CPRINTF(format, args...) cprintf(CC_EXTENSION, format, ## args)
static uint32_t extension_route_command(uint16_t command_code,
void *buffer,
size_t in_size,
size_t *out_size)
{
struct extension_command *cmd_p;
struct extension_command *end_p;
cmd_p = (struct extension_command *)&__extension_cmds;
end_p = (struct extension_command *)&__extension_cmds_end;
while (cmd_p != end_p) {
if (cmd_p->command_code == command_code)
return cmd_p->handler(command_code, buffer,
in_size, out_size);
cmd_p++;
}
CPRINTF("%s: handler %d not found\n", __func__, command_code);
/* This covers the case of the handler not found. */
*out_size = 0;
return VENDOR_RC_NO_SUCH_COMMAND;
}
uint32_t usb_extension_route_command(uint16_t command_code,
void *buffer,
size_t in_size,
size_t *out_size)
{
int is_allowed = 0;
switch (command_code) {
#ifdef CR50_DEV
case VENDOR_CC_IMMEDIATE_RESET:
#endif /* defined(CR50_DEV) */
case EXTENSION_POST_RESET: /* Always need to be able to reset. */
is_allowed = 1;
break;
default:
break;
}
if (is_allowed)
return extension_route_command(command_code, buffer, in_size,
out_size);
/* Otherwise, we don't allow this command. */
CPRINTF("%s: ignoring vendor cmd %d\n", __func__, command_code);
*out_size = 0;
return VENDOR_RC_NO_SUCH_COMMAND;
}
uint32_t tpm_extension_route_command(uint16_t command_code,
void *buffer,
size_t in_size,
size_t *out_size)
{
/*
* TODO(aaboagye): Determine what commands (if any) should be filtered.
*/
return extension_route_command(command_code, buffer, in_size, out_size);
}
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