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-rw-r--r--plat/imx/imx8m/imx8mn/gpc.c207
1 files changed, 207 insertions, 0 deletions
diff --git a/plat/imx/imx8m/imx8mn/gpc.c b/plat/imx/imx8m/imx8mn/gpc.c
new file mode 100644
index 0000000..4e05297
--- /dev/null
+++ b/plat/imx/imx8m/imx8mn/gpc.c
@@ -0,0 +1,207 @@
+/*
+ * Copyright 2019-2022 NXP
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#include <common/debug.h>
+#include <drivers/delay_timer.h>
+#include <lib/mmio.h>
+#include <lib/psci/psci.h>
+#include <lib/smccc.h>
+#include <services/std_svc.h>
+
+#include <gpc.h>
+#include <imx_sip_svc.h>
+#include <platform_def.h>
+
+#define CCGR(x) (0x4000 + (x) * 0x10)
+
+#define MIPI_PWR_REQ BIT(0)
+#define OTG1_PWR_REQ BIT(2)
+#define HSIOMIX_PWR_REQ BIT(4)
+#define GPUMIX_PWR_REQ BIT(7)
+#define DISPMIX_PWR_REQ BIT(10)
+
+#define HSIOMIX_ADB400_SYNC BIT(5)
+#define DISPMIX_ADB400_SYNC BIT(7)
+#define GPUMIX_ADB400_SYNC (0x5 << 9)
+#define HSIOMIX_ADB400_ACK BIT(23)
+#define DISPMIX_ADB400_ACK BIT(25)
+#define GPUMIX_ADB400_ACK (0x5 << 27)
+
+#define MIPI_PGC 0xc00
+#define OTG1_PGC 0xc80
+#define HSIOMIX_PGC 0xd00
+#define GPUMIX_PGC 0xdc0
+#define DISPMIX_PGC 0xe80
+
+enum pu_domain_id {
+ HSIOMIX,
+ OTG1 = 2,
+ GPUMIX = 4,
+ DISPMIX = 9,
+ MIPI,
+};
+
+/* PU domain, add some hole to minimize the uboot change */
+static struct imx_pwr_domain pu_domains[11] = {
+ [HSIOMIX] = IMX_MIX_DOMAIN(HSIOMIX, false),
+ [OTG1] = IMX_PD_DOMAIN(OTG1, true),
+ [GPUMIX] = IMX_MIX_DOMAIN(GPUMIX, false),
+ [DISPMIX] = IMX_MIX_DOMAIN(DISPMIX, false),
+ [MIPI] = IMX_PD_DOMAIN(MIPI, true),
+};
+
+static unsigned int pu_domain_status;
+
+void imx_gpc_pm_domain_enable(uint32_t domain_id, bool on)
+{
+ if (domain_id > MIPI) {
+ return;
+ }
+
+ struct imx_pwr_domain *pwr_domain = &pu_domains[domain_id];
+
+ if (on) {
+ if (pwr_domain->need_sync) {
+ pu_domain_status |= (1 << domain_id);
+ }
+
+ /* HSIOMIX has no PU bit, so skip for it */
+ if (domain_id != HSIOMIX) {
+ /* clear the PGC bit */
+ mmio_clrbits_32(IMX_GPC_BASE + pwr_domain->pgc_offset, 0x1);
+
+ /* power up the domain */
+ mmio_setbits_32(IMX_GPC_BASE + PU_PGC_UP_TRG, pwr_domain->pwr_req);
+
+ /* wait for power request done */
+ while (mmio_read_32(IMX_GPC_BASE + PU_PGC_UP_TRG) & pwr_domain->pwr_req) {
+ ;
+ }
+ }
+
+ if (domain_id == DISPMIX) {
+ /* de-reset bus_blk clk and
+ * enable bus_blk clk
+ */
+ mmio_write_32(0x32e28000, 0x100);
+ mmio_write_32(0x32e28004, 0x100);
+ }
+
+ /* handle the ADB400 sync */
+ if (pwr_domain->need_sync) {
+ /* clear adb power down request */
+ mmio_setbits_32(IMX_GPC_BASE + GPC_PU_PWRHSK, pwr_domain->adb400_sync);
+
+ /* wait for adb power request ack */
+ while (!(mmio_read_32(IMX_GPC_BASE + GPC_PU_PWRHSK) & pwr_domain->adb400_ack)) {
+ ;
+ }
+ }
+ } else {
+ pu_domain_status &= ~(1 << domain_id);
+
+ if (domain_id == OTG1) {
+ return;
+ }
+
+ /* handle the ADB400 sync */
+ if (pwr_domain->need_sync) {
+
+ /* set adb power down request */
+ mmio_clrbits_32(IMX_GPC_BASE + GPC_PU_PWRHSK, pwr_domain->adb400_sync);
+
+ /* wait for adb power request ack */
+ while ((mmio_read_32(IMX_GPC_BASE + GPC_PU_PWRHSK) & pwr_domain->adb400_ack)) {
+ ;
+ }
+ }
+
+ /* HSIOMIX has no PU bit, so skip for it */
+ if (domain_id != HSIOMIX) {
+ /* set the PGC bit */
+ mmio_setbits_32(IMX_GPC_BASE + pwr_domain->pgc_offset, 0x1);
+
+ /* power down the domain */
+ mmio_setbits_32(IMX_GPC_BASE + PU_PGC_DN_TRG, pwr_domain->pwr_req);
+
+ /* wait for power request done */
+ while (mmio_read_32(IMX_GPC_BASE + PU_PGC_DN_TRG) & pwr_domain->pwr_req) {
+ ;
+ }
+ }
+ }
+}
+
+void imx_gpc_init(void)
+{
+ unsigned int val;
+ int i;
+
+ /* mask all the wakeup irq by default */
+ for (i = 0; i < 4; i++) {
+ mmio_write_32(IMX_GPC_BASE + IMR1_CORE0_A53 + i * 4, ~0x0);
+ mmio_write_32(IMX_GPC_BASE + IMR1_CORE1_A53 + i * 4, ~0x0);
+ mmio_write_32(IMX_GPC_BASE + IMR1_CORE2_A53 + i * 4, ~0x0);
+ mmio_write_32(IMX_GPC_BASE + IMR1_CORE3_A53 + i * 4, ~0x0);
+ mmio_write_32(IMX_GPC_BASE + IMR1_CORE0_M4 + i * 4, ~0x0);
+ }
+
+ val = mmio_read_32(IMX_GPC_BASE + LPCR_A53_BSC);
+ /* use GIC wake_request to wakeup C0~C3 from LPM */
+ val |= CORE_WKUP_FROM_GIC;
+ /* clear the MASTER0 LPM handshake */
+ val &= ~MASTER0_LPM_HSK;
+ mmio_write_32(IMX_GPC_BASE + LPCR_A53_BSC, val);
+
+ /* clear MASTER1 & MASTER2 mapping in CPU0(A53) */
+ mmio_clrbits_32(IMX_GPC_BASE + MST_CPU_MAPPING, (MASTER1_MAPPING |
+ MASTER2_MAPPING));
+
+ /* set all mix/PU in A53 domain */
+ mmio_write_32(IMX_GPC_BASE + PGC_CPU_0_1_MAPPING, 0xffff);
+
+ /*
+ * Set the CORE & SCU power up timing:
+ * SW = 0x1, SW2ISO = 0x1;
+ * the CPU CORE and SCU power up timming counter
+ * is drived by 32K OSC, each domain's power up
+ * latency is (SW + SW2ISO) / 32768
+ */
+ mmio_write_32(IMX_GPC_BASE + COREx_PGC_PCR(0) + 0x4, 0x401);
+ mmio_write_32(IMX_GPC_BASE + COREx_PGC_PCR(1) + 0x4, 0x401);
+ mmio_write_32(IMX_GPC_BASE + COREx_PGC_PCR(2) + 0x4, 0x401);
+ mmio_write_32(IMX_GPC_BASE + COREx_PGC_PCR(3) + 0x4, 0x401);
+ mmio_write_32(IMX_GPC_BASE + PLAT_PGC_PCR + 0x4, 0x401);
+ mmio_write_32(IMX_GPC_BASE + PGC_SCU_TIMING,
+ (0x59 << TMC_TMR_SHIFT) | 0x5B | (0x2 << TRC1_TMC_SHIFT));
+
+ /* set DUMMY PDN/PUP ACK by default for A53 domain */
+ mmio_write_32(IMX_GPC_BASE + PGC_ACK_SEL_A53,
+ A53_DUMMY_PUP_ACK | A53_DUMMY_PDN_ACK);
+
+ /* clear DSM by default */
+ val = mmio_read_32(IMX_GPC_BASE + SLPCR);
+ val &= ~SLPCR_EN_DSM;
+ /* enable the fast wakeup wait mode */
+ val |= SLPCR_A53_FASTWUP_WAIT_MODE;
+ /* clear the RBC */
+ val &= ~(0x3f << SLPCR_RBC_COUNT_SHIFT);
+ /* set the STBY_COUNT to 0x5, (128 * 30)us */
+ val &= ~(0x7 << SLPCR_STBY_COUNT_SHFT);
+ val |= (0x5 << SLPCR_STBY_COUNT_SHFT);
+ mmio_write_32(IMX_GPC_BASE + SLPCR, val);
+
+ /*
+ * USB PHY power up needs to make sure RESET bit in SRC is clear,
+ * otherwise, the PU power up bit in GPC will NOT self-cleared.
+ * only need to do it once.
+ */
+ mmio_clrbits_32(IMX_SRC_BASE + SRC_OTG1PHY_SCR, 0x1);
+}