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/*
* Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
#include <arch_helpers.h>
#include <common/debug.h>
#include <drivers/delay_timer.h>
#include <lib/mmio.h>
#include <m0_ctl.h>
#include <plat_private.h>
#include <rk3399_def.h>
#include <secure.h>
#include <soc.h>
void m0_init(void)
{
/* secure config for M0 */
mmio_write_32(SGRF_BASE + SGRF_PMU_CON(0), WMSK_BIT(7));
mmio_write_32(SGRF_BASE + SGRF_SOC_CON(6), WMSK_BIT(12));
/* document is wrong, PMU_CRU_GATEDIS_CON0 do not need set MASK BIT */
mmio_setbits_32(PMUCRU_BASE + PMUCRU_GATEDIS_CON0, 0x02);
/*
* To switch the parent to xin24M and div == 1,
*
* We need to close most of the PLLs and clocks except the OSC 24MHz
* durning suspend, and this should be enough to supplies the ddrfreq,
* For the simple handle, we just keep the fixed 24MHz to supply the
* suspend and ddrfreq directly.
*/
mmio_write_32(PMUCRU_BASE + PMUCRU_CLKSEL_CON0,
BIT_WITH_WMSK(15) | BITS_WITH_WMASK(0x0, 0x1f, 8));
mmio_write_32(PMUCRU_BASE + PMUCRU_CLKGATE_CON2, WMSK_BIT(5));
}
void m0_configure_execute_addr(uintptr_t addr)
{
/* set the execute address for M0 */
mmio_write_32(SGRF_BASE + SGRF_PMU_CON(3),
BITS_WITH_WMASK((addr >> 12) & 0xffff,
0xffffu, 0));
mmio_write_32(SGRF_BASE + SGRF_PMU_CON(7),
BITS_WITH_WMASK((addr >> 28) & 0xf,
0xfu, 0));
}
void m0_start(void)
{
/* enable clocks for M0 */
mmio_write_32(PMUCRU_BASE + PMUCRU_CLKGATE_CON2,
BITS_WITH_WMASK(0x0, 0xf, 0));
/* clean the PARAM_M0_DONE flag, mean that M0 will start working */
mmio_write_32(M0_PARAM_ADDR + PARAM_M0_DONE, 0);
dmbst();
mmio_write_32(PMUCRU_BASE + PMUCRU_SOFTRST_CON0,
BITS_WITH_WMASK(0x0, 0x4, 0));
udelay(5);
/* start M0 */
mmio_write_32(PMUCRU_BASE + PMUCRU_SOFTRST_CON0,
BITS_WITH_WMASK(0x0, 0x20, 0));
dmbst();
}
void m0_stop(void)
{
/* stop M0 */
mmio_write_32(PMUCRU_BASE + PMUCRU_SOFTRST_CON0,
BITS_WITH_WMASK(0x24, 0x24, 0));
/* disable clocks for M0 */
mmio_write_32(PMUCRU_BASE + PMUCRU_CLKGATE_CON2,
BITS_WITH_WMASK(0xf, 0xf, 0));
}
void m0_wait_done(void)
{
do {
/*
* Don't starve the M0 for access to SRAM, so delay before
* reading the PARAM_M0_DONE value again.
*/
udelay(5);
dsb();
} while (mmio_read_32(M0_PARAM_ADDR + PARAM_M0_DONE) != M0_DONE_FLAG);
/*
* Let the M0 settle into WFI before we leave. This is so we don't reset
* the M0 in a bad spot which can cause problems with the M0.
*/
udelay(10);
dsb();
}
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