Merge tag 'u-boot-imx-20191009' of https://gitlab.denx.de/u-boot/custodians/u-boot-imx

[oweals/u-boot.git] / arch / x86 / cpu / baytrail / acpi.c

diff --git a/arch/x86/cpu/baytrail/acpi.c b/arch/x86/cpu/baytrail/acpi.c
index 1d54f7dba1a41e300000a6000b1e4473328a1b45..f44228e693980080868f3646e2a6ca454934b60a 100644 (file)
--- a/arch/x86/cpu/baytrail/acpi.c
+++ b/arch/x86/cpu/baytrail/acpi.c
@@ -1,14 +1,17 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
- *
- * SPDX-License-Identifier:    GPL-2.0+
  */
 
 #include <common.h>
+#include <acpi_s3.h>
+#include <cpu.h>
+#include <dm.h>
+#include <dm/uclass-internal.h>
 #include <asm/acpi_table.h>
-#include <asm/ioapic.h>
-#include <asm/mpspec.h>
+#include <asm/io.h>
 #include <asm/tables.h>
+#include <asm/arch/global_nvs.h>
 #include <asm/arch/iomap.h>
 
 void acpi_create_fadt(struct acpi_fadt *fadt, struct acpi_facs *facs,
@@ -69,7 +72,7 @@ void acpi_create_fadt(struct acpi_fadt *fadt, struct acpi_facs *facs,
        fadt->reset_reg.access_size = ACPI_ACCESS_SIZE_BYTE_ACCESS;
        fadt->reset_reg.addrl = IO_PORT_RESET;
        fadt->reset_reg.addrh = 0;
-       fadt->reset_value = SYS_RST | RST_CPU;
+       fadt->reset_value = SYS_RST | RST_CPU | FULL_RST;
 
        fadt->x_firmware_ctl_l = (u32)facs;
        fadt->x_firmware_ctl_h = 0;
@@ -135,29 +138,69 @@ void acpi_create_fadt(struct acpi_fadt *fadt, struct acpi_facs *facs,
        header->checksum = table_compute_checksum(fadt, header->length);
 }
 
-static int acpi_create_madt_irq_overrides(u32 current)
+void acpi_create_gnvs(struct acpi_global_nvs *gnvs)
+{
+       struct udevice *dev;
+       int ret;
+
+       /* at least we have one processor */
+       gnvs->pcnt = 1;
+       /* override the processor count with actual number */
+       ret = uclass_find_first_device(UCLASS_CPU, &dev);
+       if (ret == 0 && dev != NULL) {
+               ret = cpu_get_count(dev);
+               if (ret > 0)
+                       gnvs->pcnt = ret;
+       }
+
+       /* determine whether internal uart is on */
+       if (IS_ENABLED(CONFIG_INTERNAL_UART))
+               gnvs->iuart_en = 1;
+       else
+               gnvs->iuart_en = 0;
+}
+
+#ifdef CONFIG_HAVE_ACPI_RESUME
+/*
+ * The following two routines are called at a very early stage, even before
+ * FSP 2nd phase API fsp_init() is called. Registers off ACPI_BASE_ADDRESS
+ * and PMC_BASE_ADDRESS are accessed, so we need make sure the base addresses
+ * of these two blocks are programmed by either U-Boot or FSP.
+ *
+ * It has been verified that 1st phase API (see arch/x86/lib/fsp1/fsp_car.S)
+ * on Intel BayTrail SoC already initializes these two base addresses so
+ * we are safe to access these registers here.
+ */
+
+enum acpi_sleep_state chipset_prev_sleep_state(void)
 {
-       struct acpi_madt_irqoverride *irqovr;
-       u16 sci_flags = MP_IRQ_TRIGGER_LEVEL | MP_IRQ_POLARITY_HIGH;
-       int length = 0;
+       u32 pm1_sts;
+       u32 pm1_cnt;
+       u32 gen_pmcon1;
+       enum acpi_sleep_state prev_sleep_state = ACPI_S0;
 
-       irqovr = (void *)current;
-       length += acpi_create_madt_irqoverride(irqovr, 0, 0, 2, 0);
+       /* Read Power State */
+       pm1_sts = inw(ACPI_BASE_ADDRESS + PM1_STS);
+       pm1_cnt = inl(ACPI_BASE_ADDRESS + PM1_CNT);
+       gen_pmcon1 = readl(PMC_BASE_ADDRESS + GEN_PMCON1);
 
-       irqovr = (void *)(current + length);
-       length += acpi_create_madt_irqoverride(irqovr, 0, 9, 9, sci_flags);
+       debug("PM1_STS = 0x%x PM1_CNT = 0x%x GEN_PMCON1 = 0x%x\n",
+             pm1_sts, pm1_cnt, gen_pmcon1);
 
-       return length;
-}
+       if (pm1_sts & WAK_STS)
+               prev_sleep_state = acpi_sleep_from_pm1(pm1_cnt);
 
-u32 acpi_fill_madt(u32 current)
-{
-       current += acpi_create_madt_lapics(current);
+       if (gen_pmcon1 & (PWR_FLR | SUS_PWR_FLR))
+               prev_sleep_state = ACPI_S5;
 
-       current += acpi_create_madt_ioapic((struct acpi_madt_ioapic *)current,
-                       2, IO_APIC_ADDR, 0);
+       return prev_sleep_state;
+}
 
-       current += acpi_create_madt_irq_overrides(current);
+void chipset_clear_sleep_state(void)
+{
+       u32 pm1_cnt;
 
-       return current;
+       pm1_cnt = inl(ACPI_BASE_ADDRESS + PM1_CNT);
+       outl(pm1_cnt & ~(SLP_TYP), ACPI_BASE_ADDRESS + PM1_CNT);
 }
+#endif