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/*
* TEE service to handle the calls to trusted applications in SVP.
*
* Copyright (C) ST-Ericsson SA 2010
* Author: Shujuan Chen <shujuan.chen@stericsson.com>
* License terms: GNU General Public License (GPL) version 2
*/
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/tee.h>
#include <linux/err.h>
#include "mach/tee_ta_start_modem.h"
static int cmp_uuid_start_modem(struct tee_uuid *uuid)
{
int ret = -EINVAL;
if (uuid == NULL)
return -EINVAL;
/* This handles the calls to TA for start the modem */
if ((uuid->timeLow == UUID_TEE_TA_START_MODEM_LOW) &&
(uuid->timeMid == UUID_TEE_TA_START_MODEM_MID) &&
(uuid->timeHiAndVersion == UUID_TEE_TA_START_MODEM_HIGH)) {
u8 clockSeqAndNode[TEE_UUID_CLOCK_SIZE] =
UUID_TEE_TA_START_MODEM_CLOCKSEQ;
ret = memcmp(uuid->clockSeqAndNode, clockSeqAndNode,
TEE_UUID_CLOCK_SIZE);
}
return ret;
}
int call_sec_world(struct tee_session *ts, int sec_cmd)
{
int ret = 0;
if (ts == NULL)
return -EINVAL;
if (cmp_uuid_start_modem(ts->uuid))
return -EINVAL;
switch (ts->cmd) {
case COMMAND_ID_START_MODEM:
ret = tee_ta_start_modem((struct tee_ta_start_modem *)
ts->op);
if (ret) {
ts->err = TEED_ERROR_GENERIC;
ts->origin = TEED_ORIGIN_TEE_APPLICATION;
pr_err("tee_ta_start_modem() failed!\n");
return ret;
}
break;
default:
break;
}
/* TODO: to handle more trusted applications. */
return ret;
}
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