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/*
* Copyright (c) 2021, MediaTek Inc. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <cdefs.h>
#include <common/debug.h>
#include <lib/mmio.h>
#include <lib/utils_def.h>
#include <mt_mcdi.h>
/* Read/Write */
#define APMCU_MCUPM_MBOX_AP_READY U(0)
#define APMCU_MCUPM_MBOX_RESERVED_1 U(1)
#define APMCU_MCUPM_MBOX_RESERVED_2 U(2)
#define APMCU_MCUPM_MBOX_RESERVED_3 U(3)
#define APMCU_MCUPM_MBOX_PWR_CTRL_EN U(4)
#define APMCU_MCUPM_MBOX_L3_CACHE_MODE U(5)
#define APMCU_MCUPM_MBOX_BUCK_MODE U(6)
#define APMCU_MCUPM_MBOX_ARMPLL_MODE U(7)
/* Read only */
#define APMCU_MCUPM_MBOX_TASK_STA U(8)
#define APMCU_MCUPM_MBOX_RESERVED_9 U(9)
#define APMCU_MCUPM_MBOX_RESERVED_10 U(10)
#define APMCU_MCUPM_MBOX_RESERVED_11 U(11)
/* CPC mode - Read/Write */
#define APMCU_MCUPM_MBOX_WAKEUP_CPU U(12)
/* Mbox Slot: APMCU_MCUPM_MBOX_PWR_CTRL_EN */
#define MCUPM_MCUSYS_CTRL BIT(0)
#define MCUPM_BUCK_CTRL BIT(1)
#define MCUPM_ARMPLL_CTRL BIT(2)
#define MCUPM_CM_CTRL BIT(3)
#define MCUPM_PWR_CTRL_MASK GENMASK(3, 0)
/* Mbox Slot: APMCU_MCUPM_MBOX_BUCK_MODE */
#define MCUPM_BUCK_NORMAL_MODE U(0) /* default */
#define MCUPM_BUCK_LP_MODE U(1)
#define MCUPM_BUCK_OFF_MODE U(2)
#define NF_MCUPM_BUCK_MODE U(3)
/* Mbox Slot: APMCU_MCUPM_MBOX_ARMPLL_MODE */
#define MCUPM_ARMPLL_ON U(0) /* default */
#define MCUPM_ARMPLL_GATING U(1)
#define MCUPM_ARMPLL_OFF U(2)
#define NF_MCUPM_ARMPLL_MODE U(3)
/* Mbox Slot: APMCU_MCUPM_MBOX_TASK_STA */
#define MCUPM_TASK_UNINIT U(0)
#define MCUPM_TASK_INIT U(1)
#define MCUPM_TASK_INIT_FINISH U(2)
#define MCUPM_TASK_WAIT U(3)
#define MCUPM_TASK_RUN U(4)
#define MCUPM_TASK_PAUSE U(5)
#define SSPM_MBOX_3_BASE U(0x10420000)
#define MCDI_NOT_INIT U(0)
#define MCDI_INIT_1 U(1)
#define MCDI_INIT_2 U(2)
#define MCDI_INIT_DONE U(3)
static int mcdi_init_status __section("tzfw_coherent_mem");
static inline uint32_t mcdi_mbox_read(uint32_t id)
{
return mmio_read_32(SSPM_MBOX_3_BASE + (id << 2));
}
static inline void mcdi_mbox_write(uint32_t id, uint32_t val)
{
mmio_write_32(SSPM_MBOX_3_BASE + (id << 2), val);
}
static void mtk_mcupm_pwr_ctrl_setting(uint32_t dev)
{
mcdi_mbox_write(APMCU_MCUPM_MBOX_PWR_CTRL_EN, dev);
}
static void mtk_set_mcupm_pll_mode(uint32_t mode)
{
if (mode < NF_MCUPM_ARMPLL_MODE) {
mcdi_mbox_write(APMCU_MCUPM_MBOX_ARMPLL_MODE, mode);
}
}
static void mtk_set_mcupm_buck_mode(uint32_t mode)
{
if (mode < NF_MCUPM_BUCK_MODE) {
mcdi_mbox_write(APMCU_MCUPM_MBOX_BUCK_MODE, mode);
}
}
static int mtk_mcupm_is_ready(void)
{
unsigned int sta = mcdi_mbox_read(APMCU_MCUPM_MBOX_TASK_STA);
return ((sta == MCUPM_TASK_WAIT) || (sta == MCUPM_TASK_INIT_FINISH));
}
static int mcdi_init_1(void)
{
unsigned int sta = mcdi_mbox_read(APMCU_MCUPM_MBOX_TASK_STA);
if (sta != MCUPM_TASK_INIT) {
return -1;
}
mtk_set_mcupm_pll_mode(MCUPM_ARMPLL_OFF);
mtk_set_mcupm_buck_mode(MCUPM_BUCK_OFF_MODE);
mtk_mcupm_pwr_ctrl_setting(
MCUPM_MCUSYS_CTRL |
MCUPM_BUCK_CTRL |
MCUPM_ARMPLL_CTRL);
mcdi_mbox_write(APMCU_MCUPM_MBOX_AP_READY, 1);
return 0;
}
static int mcdi_init_2(void)
{
return mtk_mcupm_is_ready() ? 0 : -1;
}
int mcdi_try_init(void)
{
if (mcdi_init_status == MCDI_INIT_DONE) {
return 0;
}
if (mcdi_init_status == MCDI_NOT_INIT) {
mcdi_init_status = MCDI_INIT_1;
}
if (mcdi_init_status == MCDI_INIT_1 && mcdi_init_1() == 0) {
mcdi_init_status = MCDI_INIT_2;
}
if (mcdi_init_status == MCDI_INIT_2 && mcdi_init_2() == 0) {
mcdi_init_status = MCDI_INIT_DONE;
}
INFO("mcdi ready for mcusys-off-idle and system suspend\n");
return (mcdi_init_status == MCDI_INIT_DONE) ? 0 : mcdi_init_status;
}
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