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// SPDX-License-Identifier: BSD-2-Clause
/*
* Copyright (c) 2019, Broadcom
*/
#include <drivers/gic.h>
#include <drivers/sp805_wdt.h>
#include <io.h>
#include <kernel/interrupt.h>
#include <kernel/misc.h>
#include <kernel/pseudo_ta.h>
#include <trace.h>
#define SEC_WD_SERVICE_UUID \
{ 0x6272636D, 0x2019, 0x0801, \
{ 0x42, 0x43, 0x4D, 0x5F, 0x57, 0x44, 0x54, 0x30 } }
#define PTA_BCM_SEC_WD_CMD_CONFIG 0
#define PTA_BCM_SEC_WD_CMD_START 1
#define PTA_BCM_SEC_WD_CMD_PING 2
#define PTA_BCM_SEC_WD_CMD_STOP 3
#define PTA_BCM_SEC_WD_CMD_SET_TIMEOUT 4
#define SEC_WD_TA_NAME "pta_bcm_sec_wd.ta"
static struct sp805_wdt_data wd_pd;
static void wd_isr_handler(struct wdt_chip *chip __unused)
{
/* Do nothing */
DMSG("Watchdog ISR handler !!!");
}
static TEE_Result pta_wd_config(uint32_t param_types,
TEE_Param params[TEE_NUM_PARAMS])
{
uint32_t timeout = 0;
uint32_t exp_param_types = TEE_PARAM_TYPES(TEE_PARAM_TYPE_VALUE_INPUT,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE);
if (exp_param_types != param_types) {
EMSG("Invalid Param types");
return TEE_ERROR_BAD_PARAMETERS;
}
timeout = params[0].value.a;
sp805_wdt_init(&wd_pd, SEC_WDT_BASE, SEC_WDT_CLK_HZ, timeout);
sp805_register_itr_handler(&wd_pd, GIC_SPI(SEC_WDT_INTR),
ITRF_TRIGGER_LEVEL, wd_isr_handler);
wd_pd.chip.ops->start(&wd_pd.chip);
return TEE_SUCCESS;
}
static TEE_Result pta_wd_start(uint32_t param_types,
TEE_Param params[TEE_NUM_PARAMS] __unused)
{
uint32_t exp_param_types = TEE_PARAM_TYPES(TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE);
if (exp_param_types != param_types) {
EMSG("Invalid Param types");
return TEE_ERROR_BAD_PARAMETERS;
}
wd_pd.chip.ops->start(&wd_pd.chip);
return TEE_SUCCESS;
}
static TEE_Result pta_wd_ping(uint32_t param_types,
TEE_Param params[TEE_NUM_PARAMS] __unused)
{
uint32_t exp_param_types = TEE_PARAM_TYPES(TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE);
if (exp_param_types != param_types) {
EMSG("Invalid Param types");
return TEE_ERROR_BAD_PARAMETERS;
}
wd_pd.chip.ops->ping(&wd_pd.chip);
return TEE_SUCCESS;
}
static TEE_Result pta_wd_stop(uint32_t param_types,
TEE_Param params[TEE_NUM_PARAMS] __unused)
{
uint32_t exp_param_types = TEE_PARAM_TYPES(TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE);
if (exp_param_types != param_types) {
EMSG("Invalid Param types");
return TEE_ERROR_BAD_PARAMETERS;
}
wd_pd.chip.ops->stop(&wd_pd.chip);
return TEE_SUCCESS;
}
static TEE_Result pta_wd_set_timeout(uint32_t param_types,
TEE_Param params[TEE_NUM_PARAMS])
{
uint32_t timeout = 0;
uint32_t exp_param_types = TEE_PARAM_TYPES(TEE_PARAM_TYPE_VALUE_INPUT,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE);
if (exp_param_types != param_types) {
EMSG("Invalid Param types");
return TEE_ERROR_BAD_PARAMETERS;
}
timeout = params[0].value.a;
wd_pd.chip.ops->set_timeout(&wd_pd.chip, timeout);
return TEE_SUCCESS;
}
static TEE_Result invoke_command(void *session_context __unused,
uint32_t cmd_id,
uint32_t param_types,
TEE_Param params[TEE_NUM_PARAMS])
{
TEE_Result res = TEE_SUCCESS;
DMSG("command entry point[%d] for \"%s\"", cmd_id, SEC_WD_TA_NAME);
switch (cmd_id) {
case PTA_BCM_SEC_WD_CMD_CONFIG:
res = pta_wd_config(param_types, params);
break;
case PTA_BCM_SEC_WD_CMD_START:
res = pta_wd_start(param_types, params);
break;
case PTA_BCM_SEC_WD_CMD_PING:
res = pta_wd_ping(param_types, params);
break;
case PTA_BCM_SEC_WD_CMD_STOP:
res = pta_wd_stop(param_types, params);
break;
case PTA_BCM_SEC_WD_CMD_SET_TIMEOUT:
res = pta_wd_set_timeout(param_types, params);
break;
default:
EMSG("cmd: %d Not supported %s", cmd_id, SEC_WD_TA_NAME);
res = TEE_ERROR_NOT_SUPPORTED;
break;
}
return res;
}
pseudo_ta_register(.uuid = SEC_WD_SERVICE_UUID,
.name = SEC_WD_TA_NAME,
.flags = PTA_DEFAULT_FLAGS,
.invoke_command_entry_point = invoke_command);
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