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/*
* Copyright 2016 Freescale Semiconductor, Inc.
* Author: Hongbo Zhang <hongbo.zhang@nxp.com>
*
* SPDX-License-Identifier: GPL-2.0+
* This file implements LS102X platform PSCI SYSTEM-SUSPEND function
*/
#include <config.h>
#include <asm/io.h>
#include <asm/psci.h>
#include <asm/arch/immap_ls102xa.h>
#include <fsl_immap.h>
#include "fsl_epu.h"
#define __secure __attribute__((section("._secure.text")))
#define CCSR_GICD_CTLR 0x1000
#define CCSR_GICC_CTLR 0x2000
#define DCSR_RCPM_CG1CR0 0x31c
#define DCSR_RCPM_CSTTACR0 0xb00
#define DCFG_CRSTSR_WDRFR 0x8
#define DDR_RESV_LEN 128
#ifdef CONFIG_LS1_DEEP_SLEEP
/*
* DDR controller initialization training breaks the first 128 bytes of DDR,
* save them so that the bootloader can restore them while resuming.
*/
static void __secure ls1_save_ddr_head(void)
{
const char *src = (const char *)CONFIG_SYS_SDRAM_BASE;
char *dest = (char *)(OCRAM_BASE_S_ADDR + OCRAM_S_SIZE - DDR_RESV_LEN);
struct ccsr_scfg __iomem *scfg = (void *)CONFIG_SYS_FSL_SCFG_ADDR;
int i;
out_le32(&scfg->sparecr[2], dest);
for (i = 0; i < DDR_RESV_LEN; i++)
*dest++ = *src++;
}
static void __secure ls1_fsm_setup(void)
{
void *dcsr_epu_base = (void *)(CONFIG_SYS_DCSRBAR + EPU_BLOCK_OFFSET);
void *dcsr_rcpm_base = (void *)CONFIG_SYS_DCSR_RCPM_ADDR;
out_be32(dcsr_rcpm_base + DCSR_RCPM_CSTTACR0, 0x00001001);
out_be32(dcsr_rcpm_base + DCSR_RCPM_CG1CR0, 0x00000001);
fsl_epu_setup((void *)dcsr_epu_base);
/* Pull MCKE signal low before enabling deep sleep signal in FPGA */
out_be32(dcsr_epu_base + EPECR0, 0x5);
out_be32(dcsr_epu_base + EPSMCR15, 0x76300000);
}
static void __secure ls1_deepsleep_irq_cfg(void)
{
struct ccsr_scfg __iomem *scfg = (void *)CONFIG_SYS_FSL_SCFG_ADDR;
struct ccsr_rcpm __iomem *rcpm = (void *)CONFIG_SYS_FSL_RCPM_ADDR;
u32 ippdexpcr0, ippdexpcr1, pmcintecr = 0;
/* Mask interrupts from GIC */
out_be32(&rcpm->nfiqoutr, 0x0ffffffff);
out_be32(&rcpm->nirqoutr, 0x0ffffffff);
/* Mask deep sleep wake-up interrupts while entering deep sleep */
out_be32(&rcpm->dsimskr, 0x0ffffffff);
ippdexpcr0 = in_be32(&rcpm->ippdexpcr0);
/*
* Workaround: There is bug of register ippdexpcr1, when read it always
* returns zero, so its value is saved to a scrachpad register to be
* read, that is why we don't read it from register ippdexpcr1 itself.
*/
ippdexpcr1 = in_le32(&scfg->sparecr[7]);
if (ippdexpcr0 & RCPM_IPPDEXPCR0_ETSEC)
pmcintecr |= SCFG_PMCINTECR_ETSECRXG0 |
SCFG_PMCINTECR_ETSECRXG1 |
SCFG_PMCINTECR_ETSECERRG0 |
SCFG_PMCINTECR_ETSECERRG1;
if (ippdexpcr0 & RCPM_IPPDEXPCR0_GPIO)
pmcintecr |= SCFG_PMCINTECR_GPIO;
if (ippdexpcr1 & RCPM_IPPDEXPCR1_LPUART)
pmcintecr |= SCFG_PMCINTECR_LPUART;
if (ippdexpcr1 & RCPM_IPPDEXPCR1_FLEXTIMER)
pmcintecr |= SCFG_PMCINTECR_FTM;
/* Always set external IRQ pins as wakeup source */
pmcintecr |= SCFG_PMCINTECR_IRQ0 | SCFG_PMCINTECR_IRQ1;
out_be32(&scfg->pmcintlecr, 0);
/* Clear PMC interrupt status */
out_be32(&scfg->pmcintsr, 0xffffffff);
/* Enable wakeup interrupt during deep sleep */
out_be32(&scfg->pmcintecr, pmcintecr);
}
static void __secure ls1_delay(unsigned int loop)
{
while (loop--) {
int i = 1000;
while (i--)
;
}
}
static void __secure ls1_start_fsm(void)
{
void *dcsr_epu_base = (void *)(CONFIG_SYS_DCSRBAR + EPU_BLOCK_OFFSET);
void *ccsr_gic_base = (void *)CONFIG_SYS_GIC_ADDR;
struct ccsr_scfg __iomem *scfg = (void *)CONFIG_SYS_FSL_SCFG_ADDR;
struct ccsr_ddr __iomem *ddr = (void *)CONFIG_SYS_FSL_DDR_ADDR;
/* Set HRSTCR */
setbits_be32(&scfg->hrstcr, 0x80000000);
/* Place DDR controller in self refresh mode */
setbits_be32(&ddr->sdram_cfg_2, 0x80000000);
ls1_delay(2000);
/* Set EVT4_B to lock the signal MCKE down */
out_be32(dcsr_epu_base + EPECR0, 0x0);
ls1_delay(2000);
out_be32(ccsr_gic_base + CCSR_GICD_CTLR, 0x0);
out_be32(ccsr_gic_base + CCSR_GICC_CTLR, 0x0);
/* Enable all EPU Counters */
setbits_be32(dcsr_epu_base + EPGCR, 0x80000000);
/* Enable SCU15 */
setbits_be32(dcsr_epu_base + EPECR15, 0x90000004);
/* Enter WFI mode, and EPU FSM will start */
__asm__ __volatile__ ("wfi" : : : "memory");
/* NEVER ENTER HERE */
while (1)
;
}
static void __secure ls1_deep_sleep(u32 entry_point)
{
struct ccsr_scfg __iomem *scfg = (void *)CONFIG_SYS_FSL_SCFG_ADDR;
struct ccsr_gur __iomem *gur = (void *)CONFIG_SYS_FSL_GUTS_ADDR;
struct ccsr_rcpm __iomem *rcpm = (void *)CONFIG_SYS_FSL_RCPM_ADDR;
#ifdef QIXIS_BASE
u32 tmp;
void *qixis_base = (void *)QIXIS_BASE;
#endif
/* Enable cluster to enter the PCL10 state */
out_be32(&scfg->clusterpmcr, SCFG_CLUSTERPMCR_WFIL2EN);
/* Save the first 128 bytes of DDR data */
ls1_save_ddr_head();
/* Save the kernel resume entry */
out_le32(&scfg->sparecr[3], entry_point);
/* Request to put cluster 0 in PCL10 state */
setbits_be32(&rcpm->clpcl10setr, RCPM_CLPCL10SETR_C0);
/* Setup the registers of the EPU FSM for deep sleep */
ls1_fsm_setup();
#ifdef QIXIS_BASE
/* Connect the EVENT button to IRQ in FPGA */
tmp = in_8(qixis_base + QIXIS_CTL_SYS);
tmp &= ~QIXIS_CTL_SYS_EVTSW_MASK;
tmp |= QIXIS_CTL_SYS_EVTSW_IRQ;
out_8(qixis_base + QIXIS_CTL_SYS, tmp);
/* Enable deep sleep signals in FPGA */
tmp = in_8(qixis_base + QIXIS_PWR_CTL2);
tmp |= QIXIS_PWR_CTL2_PCTL;
out_8(qixis_base + QIXIS_PWR_CTL2, tmp);
/* Pull down PCIe RST# */
tmp = in_8(qixis_base + QIXIS_RST_FORCE_3);
tmp |= QIXIS_RST_FORCE_3_PCIESLOT1;
out_8(qixis_base + QIXIS_RST_FORCE_3, tmp);
#endif
/* Enable Warm Device Reset */
setbits_be32(&scfg->dpslpcr, SCFG_DPSLPCR_WDRR_EN);
setbits_be32(&gur->crstsr, DCFG_CRSTSR_WDRFR);
ls1_deepsleep_irq_cfg();
psci_v7_flush_dcache_all();
ls1_start_fsm();
}
#else
static void __secure ls1_sleep(void)
{
struct ccsr_scfg __iomem *scfg = (void *)CONFIG_SYS_FSL_SCFG_ADDR;
struct ccsr_rcpm __iomem *rcpm = (void *)CONFIG_SYS_FSL_RCPM_ADDR;
#ifdef QIXIS_BASE
u32 tmp;
void *qixis_base = (void *)QIXIS_BASE;
/* Connect the EVENT button to IRQ in FPGA */
tmp = in_8(qixis_base + QIXIS_CTL_SYS);
tmp &= ~QIXIS_CTL_SYS_EVTSW_MASK;
tmp |= QIXIS_CTL_SYS_EVTSW_IRQ;
out_8(qixis_base + QIXIS_CTL_SYS, tmp);
#endif
/* Enable cluster to enter the PCL10 state */
out_be32(&scfg->clusterpmcr, SCFG_CLUSTERPMCR_WFIL2EN);
setbits_be32(&rcpm->powmgtcsr, RCPM_POWMGTCSR_LPM20_REQ);
__asm__ __volatile__ ("wfi" : : : "memory");
}
#endif
void __secure ls1_system_suspend(u32 fn, u32 entry_point, u32 context_id)
{
#ifdef CONFIG_LS1_DEEP_SLEEP
ls1_deep_sleep(entry_point);
#else
ls1_sleep();
#endif
}
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