--- /dev/null
+/*
+ * 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
+}
*dst++ = *src++;
}
+#if defined(CONFIG_ARMV7_PSCI) && defined(CONFIG_LS102XA)
+void ls1_psci_resume_fixup(void)
+{
+ u32 tmp;
+ struct ccsr_scfg __iomem *scfg = (void *)CONFIG_SYS_FSL_SCFG_ADDR;
+
+#ifdef QIXIS_BASE
+ void *qixis_base = (void *)QIXIS_BASE;
+
+ /* Pull on PCIe RST# */
+ out_8(qixis_base + QIXIS_RST_FORCE_3, 0);
+
+ /* disable 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);
+#endif
+
+ /* Disable wakeup interrupt during deep sleep */
+ out_be32(&scfg->pmcintecr, 0);
+ /* Clear PMC interrupt status */
+ out_be32(&scfg->pmcintsr, 0xffffffff);
+
+ /* Disable Warm Device Reset */
+ tmp = in_be32(&scfg->dpslpcr);
+ tmp &= ~SCFG_DPSLPCR_WDRR_EN;
+ out_be32(&scfg->dpslpcr, tmp);
+}
+#endif
+
static void dp_resume_prepare(void)
{
dp_ddr_restore();
#ifdef CONFIG_U_QE
u_qe_resume();
#endif
+#if defined(CONFIG_ARMV7_PSCI) && defined(CONFIG_LS102XA)
+ ls1_psci_resume_fixup();
+#endif
}
int fsl_dp_resume(void)
dp_resume_prepare();
/* Get the entry address and jump to kernel */
- start_addr = in_le32(&scfg->sparecr[1]);
+ start_addr = in_le32(&scfg->sparecr[3]);
debug("Entry address is 0x%08x\n", start_addr);
kernel_resume = (void (*)(void))start_addr;
secure_ram_addr(_do_nonsec_entry)(kernel_resume, 0, 0, 0);
projects / u-boot / commitdiff