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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <device/mmio.h>
#include <soc/pmic_wrap.h>
#include <timer.h>
u32 wait_for_state_idle(u32 timeout_us, void *wacs_register,
void *wacs_vldclr_register, u32 *read_reg)
{
u32 reg_rdata;
struct stopwatch sw;
stopwatch_init_usecs_expire(&sw, timeout_us);
do {
reg_rdata = read32((wacs_register));
/* if last read command timeout,clear vldclr bit
read command state machine:FSM_REQ-->wfdle-->WFVLDCLR;
write:FSM_REQ-->idle */
switch (((reg_rdata >> RDATA_WACS_FSM_SHIFT) &
RDATA_WACS_FSM_MASK)) {
case WACS_FSM_WFVLDCLR:
write32(wacs_vldclr_register, 1);
pwrap_err("WACS_FSM = PMIC_WRAP_WACS_VLDCLR\n");
break;
case WACS_FSM_WFDLE:
pwrap_err("WACS_FSM = WACS_FSM_WFDLE\n");
break;
case WACS_FSM_REQ:
pwrap_err("WACS_FSM = WACS_FSM_REQ\n");
break;
default:
break;
}
if (stopwatch_expired(&sw))
return E_PWR_WAIT_IDLE_TIMEOUT;
} while (((reg_rdata >> RDATA_WACS_FSM_SHIFT) & RDATA_WACS_FSM_MASK) !=
WACS_FSM_IDLE); /* IDLE State */
if (read_reg)
*read_reg = reg_rdata;
return 0;
}
u32 wait_for_state_ready(loop_condition_fp fp, u32 timeout_us,
void *wacs_register, u32 *read_reg)
{
u32 reg_rdata;
struct stopwatch sw;
stopwatch_init_usecs_expire(&sw, timeout_us);
do {
reg_rdata = read32((wacs_register));
if (stopwatch_expired(&sw)) {
pwrap_err("timeout when waiting for idle\n");
return E_PWR_WAIT_IDLE_TIMEOUT;
}
} while (fp(reg_rdata)); /* IDLE State */
if (read_reg)
*read_reg = reg_rdata;
return 0;
}
s32 pwrap_reset_spislv(void)
{
u32 ret = 0;
write32(&mtk_pwrap->hiprio_arb_en, 0);
write32(&mtk_pwrap->wrap_en, 0);
write32(&mtk_pwrap->mux_sel, 1);
write32(&mtk_pwrap->man_en, 1);
write32(&mtk_pwrap->dio_en, 0);
write32(&mtk_pwrap->man_cmd, (OP_WR << 13) | (OP_CSL << 8));
/* Reset counter */
write32(&mtk_pwrap->man_cmd, (OP_WR << 13) | (OP_OUTS << 8));
write32(&mtk_pwrap->man_cmd, (OP_WR << 13) | (OP_CSH << 8));
/*
* In order to pull CSN signal to PMIC,
* PMIC will count it then reset spi slave
*/
write32(&mtk_pwrap->man_cmd, (OP_WR << 13) | (OP_OUTS << 8));
write32(&mtk_pwrap->man_cmd, (OP_WR << 13) | (OP_OUTS << 8));
write32(&mtk_pwrap->man_cmd, (OP_WR << 13) | (OP_OUTS << 8));
write32(&mtk_pwrap->man_cmd, (OP_WR << 13) | (OP_OUTS << 8));
if (wait_for_state_ready(wait_for_sync, TIMEOUT_WAIT_IDLE_US,
&mtk_pwrap->wacs2_rdata, 0))
ret = E_PWR_TIMEOUT;
write32(&mtk_pwrap->man_en, 0);
write32(&mtk_pwrap->mux_sel, 0);
return ret;
}
s32 pwrap_wacs2(u32 write, u16 addr, u16 wdata, u16 *rdata, u32 init_check)
{
u32 reg_rdata = 0;
u32 wacs_write = 0;
u32 wacs_addr = 0;
u32 wacs_cmd = 0;
u32 wait_result = 0;
if (init_check) {
reg_rdata = read32(&mtk_pwrap->wacs2_rdata);
/* Prevent someone to use pwrap before pwrap init */
if (((reg_rdata >> RDATA_INIT_DONE_SHIFT) &
RDATA_INIT_DONE_MASK) != WACS_INIT_DONE) {
pwrap_err("Pwrap initialization isn't finished\n");
return E_PWR_NOT_INIT_DONE;
}
}
reg_rdata = 0;
/* Check IDLE in advance */
wait_result = wait_for_state_idle(TIMEOUT_WAIT_IDLE_US,
&mtk_pwrap->wacs2_rdata,
&mtk_pwrap->wacs2_vldclr,
0);
if (wait_result != 0) {
pwrap_err("wait_for_fsm_idle fail,wait_result=%d\n",
wait_result);
return E_PWR_WAIT_IDLE_TIMEOUT;
}
wacs_write = write << 31;
wacs_addr = (addr >> 1) << 16;
wacs_cmd = wacs_write | wacs_addr | wdata;
write32(&mtk_pwrap->wacs2_cmd, wacs_cmd);
if (write == 0) {
if (rdata == NULL) {
pwrap_err("rdata is a NULL pointer\n");
return E_PWR_INVALID_ARG;
}
wait_result = wait_for_state_ready(wait_for_fsm_vldclr,
TIMEOUT_READ_US,
&mtk_pwrap->wacs2_rdata,
®_rdata);
if (wait_result != 0) {
pwrap_err("wait_for_fsm_vldclr fail,wait_result=%d\n",
wait_result);
return E_PWR_WAIT_IDLE_TIMEOUT_READ;
}
*rdata = ((reg_rdata >> RDATA_WACS_RDATA_SHIFT)
& RDATA_WACS_RDATA_MASK);
write32(&mtk_pwrap->wacs2_vldclr, 1);
}
return 0;
}
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