[U-Boot] [PATCH v2 40/51] x86: broadwell: Add power-control support
Simon Glass
sjg at chromium.org
Sat Mar 12 06:07:25 CET 2016
Broadwell requires quite a bit of power-management setup. Add code to set
this up correctly.
Signed-off-by: Simon Glass <sjg at chromium.org>
Acked-by: Bin Meng <bmeng.cn at gmail.com>
---
Changes in v2:
- Use capitals for header guard
arch/x86/cpu/broadwell/Makefile | 1 +
arch/x86/cpu/broadwell/power_state.c | 89 +++++++++++++++++++++
arch/x86/include/asm/arch-broadwell/pm.h | 129 +++++++++++++++++++++++++++++++
3 files changed, 219 insertions(+)
create mode 100644 arch/x86/cpu/broadwell/power_state.c
create mode 100644 arch/x86/include/asm/arch-broadwell/pm.h
diff --git a/arch/x86/cpu/broadwell/Makefile b/arch/x86/cpu/broadwell/Makefile
index a542fef..5a62afa 100644
--- a/arch/x86/cpu/broadwell/Makefile
+++ b/arch/x86/cpu/broadwell/Makefile
@@ -10,5 +10,6 @@ obj-y += lpc.o
obj-y += northbridge.o
obj-y += pch.o
obj-y += pinctrl_broadwell.o
+obj-y += power_state.o
obj-y += refcode.o
obj-y += sata.o
diff --git a/arch/x86/cpu/broadwell/power_state.c b/arch/x86/cpu/broadwell/power_state.c
new file mode 100644
index 0000000..3380323
--- /dev/null
+++ b/arch/x86/cpu/broadwell/power_state.c
@@ -0,0 +1,89 @@
+/*
+ * From coreboot src/soc/intel/broadwell/romstage/power_state.c
+ *
+ * Copyright (C) 2016 Google, Inc.
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/intel_regs.h>
+#include <asm/arch/iomap.h>
+#include <asm/arch/lpc.h>
+#include <asm/arch/pch.h>
+#include <asm/arch/pm.h>
+
+/* Return 0, 3, or 5 to indicate the previous sleep state. */
+static int prev_sleep_state(struct chipset_power_state *ps)
+{
+ /* Default to S0. */
+ int prev_sleep_state = SLEEP_STATE_S0;
+
+ if (ps->pm1_sts & WAK_STS) {
+ switch ((ps->pm1_cnt & SLP_TYP) >> SLP_TYP_SHIFT) {
+#if CONFIG_HAVE_ACPI_RESUME
+ case SLP_TYP_S3:
+ prev_sleep_state = SLEEP_STATE_S3;
+ break;
+#endif
+ case SLP_TYP_S5:
+ prev_sleep_state = SLEEP_STATE_S5;
+ break;
+ }
+ /* Clear SLP_TYP. */
+ outl(ps->pm1_cnt & ~(SLP_TYP), ACPI_BASE_ADDRESS + PM1_CNT);
+ }
+
+ if (ps->gen_pmcon3 & (PWR_FLR | SUS_PWR_FLR))
+ prev_sleep_state = SLEEP_STATE_S5;
+
+ return prev_sleep_state;
+}
+
+static void dump_power_state(struct chipset_power_state *ps)
+{
+ debug("PM1_STS: %04x\n", ps->pm1_sts);
+ debug("PM1_EN: %04x\n", ps->pm1_en);
+ debug("PM1_CNT: %08x\n", ps->pm1_cnt);
+ debug("TCO_STS: %04x %04x\n", ps->tco1_sts, ps->tco2_sts);
+
+ debug("GPE0_STS: %08x %08x %08x %08x\n",
+ ps->gpe0_sts[0], ps->gpe0_sts[1],
+ ps->gpe0_sts[2], ps->gpe0_sts[3]);
+ debug("GPE0_EN: %08x %08x %08x %08x\n",
+ ps->gpe0_en[0], ps->gpe0_en[1],
+ ps->gpe0_en[2], ps->gpe0_en[3]);
+
+ debug("GEN_PMCON: %04x %04x %04x\n",
+ ps->gen_pmcon1, ps->gen_pmcon2, ps->gen_pmcon3);
+
+ debug("Previous Sleep State: S%d\n",
+ ps->prev_sleep_state);
+}
+
+/* Fill power state structure from ACPI PM registers */
+void power_state_get(struct udevice *pch_dev, struct chipset_power_state *ps)
+{
+ ps->pm1_sts = inw(ACPI_BASE_ADDRESS + PM1_STS);
+ ps->pm1_en = inw(ACPI_BASE_ADDRESS + PM1_EN);
+ ps->pm1_cnt = inl(ACPI_BASE_ADDRESS + PM1_CNT);
+ ps->tco1_sts = inw(ACPI_BASE_ADDRESS + TCO1_STS);
+ ps->tco2_sts = inw(ACPI_BASE_ADDRESS + TCO2_STS);
+ ps->gpe0_sts[0] = inl(ACPI_BASE_ADDRESS + GPE0_STS(0));
+ ps->gpe0_sts[1] = inl(ACPI_BASE_ADDRESS + GPE0_STS(1));
+ ps->gpe0_sts[2] = inl(ACPI_BASE_ADDRESS + GPE0_STS(2));
+ ps->gpe0_sts[3] = inl(ACPI_BASE_ADDRESS + GPE0_STS(3));
+ ps->gpe0_en[0] = inl(ACPI_BASE_ADDRESS + GPE0_EN(0));
+ ps->gpe0_en[1] = inl(ACPI_BASE_ADDRESS + GPE0_EN(1));
+ ps->gpe0_en[2] = inl(ACPI_BASE_ADDRESS + GPE0_EN(2));
+ ps->gpe0_en[3] = inl(ACPI_BASE_ADDRESS + GPE0_EN(3));
+
+ dm_pci_read_config16(pch_dev, GEN_PMCON_1, &ps->gen_pmcon1);
+ dm_pci_read_config16(pch_dev, GEN_PMCON_2, &ps->gen_pmcon2);
+ dm_pci_read_config16(pch_dev, GEN_PMCON_3, &ps->gen_pmcon3);
+
+ ps->prev_sleep_state = prev_sleep_state(ps);
+
+ dump_power_state(ps);
+}
diff --git a/arch/x86/include/asm/arch-broadwell/pm.h b/arch/x86/include/asm/arch-broadwell/pm.h
new file mode 100644
index 0000000..36ad842
--- /dev/null
+++ b/arch/x86/include/asm/arch-broadwell/pm.h
@@ -0,0 +1,129 @@
+/*
+ * From coreboot src/soc/intel/broadwell/include/soc/pm.h
+ *
+ * Copyright (C) 2016 Google, Inc.
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#ifndef __ASM_ARCH_PM_H
+#define __ASM_ARCH_PM_H
+
+#define PM1_STS 0x00
+#define WAK_STS (1 << 15)
+#define PCIEXPWAK_STS (1 << 14)
+#define PRBTNOR_STS (1 << 11)
+#define RTC_STS (1 << 10)
+#define PWRBTN_STS (1 << 8)
+#define GBL_STS (1 << 5)
+#define BM_STS (1 << 4)
+#define TMROF_STS (1 << 0)
+#define PM1_EN 0x02
+#define PCIEXPWAK_DIS (1 << 14)
+#define RTC_EN (1 << 10)
+#define PWRBTN_EN (1 << 8)
+#define GBL_EN (1 << 5)
+#define TMROF_EN (1 << 0)
+#define PM1_CNT 0x04
+#define SLP_EN (1 << 13)
+#define SLP_TYP (7 << 10)
+#define SLP_TYP_SHIFT 10
+#define SLP_TYP_S0 0
+#define SLP_TYP_S1 1
+#define SLP_TYP_S3 5
+#define SLP_TYP_S4 6
+#define SLP_TYP_S5 7
+#define GBL_RLS (1 << 2)
+#define BM_RLD (1 << 1)
+#define SCI_EN (1 << 0)
+#define PM1_TMR 0x08
+#define SMI_EN 0x30
+#define XHCI_SMI_EN (1 << 31)
+#define ME_SMI_EN (1 << 30)
+#define GPIO_UNLOCK_SMI_EN (1 << 27)
+#define INTEL_USB2_EN (1 << 18)
+#define LEGACY_USB2_EN (1 << 17)
+#define PERIODIC_EN (1 << 14)
+#define TCO_EN (1 << 13)
+#define MCSMI_EN (1 << 11)
+#define BIOS_RLS (1 << 7)
+#define SWSMI_TMR_EN (1 << 6)
+#define APMC_EN (1 << 5)
+#define SLP_SMI_EN (1 << 4)
+#define LEGACY_USB_EN (1 << 3)
+#define BIOS_EN (1 << 2)
+#define EOS (1 << 1)
+#define GBL_SMI_EN (1 << 0)
+#define SMI_STS 0x34
+#define UPWRC 0x3c
+#define UPWRC_WS (1 << 8)
+#define UPWRC_WE (1 << 1)
+#define UPWRC_SMI (1 << 0)
+#define GPE_CNTL 0x42
+#define SWGPE_CTRL (1 << 1)
+#define DEVACT_STS 0x44
+#define PM2_CNT 0x50
+#define TCO1_CNT 0x60
+#define TCO_TMR_HLT (1 << 11)
+#define TCO1_STS 0x64
+#define DMISCI_STS (1 << 9)
+#define TCO2_STS 0x66
+#define TCO2_STS_SECOND_TO (1 << 1)
+
+#define GPE0_REG_MAX 4
+#define GPE0_REG_SIZE 32
+#define GPE0_STS(x) (0x80 + (x * 4))
+#define GPE_31_0 0 /* 0x80/0x90 = GPE[31:0] */
+#define GPE_63_32 1 /* 0x84/0x94 = GPE[63:32] */
+#define GPE_94_64 2 /* 0x88/0x98 = GPE[94:64] */
+#define GPE_STD 3 /* 0x8c/0x9c = Standard GPE */
+#define WADT_STS (1 << 18)
+#define GP27_STS (1 << 16)
+#define PME_B0_STS (1 << 13)
+#define ME_SCI_STS (1 << 12)
+#define PME_STS (1 << 11)
+#define BATLOW_STS (1 << 10)
+#define PCI_EXP_STS (1 << 9)
+#define SMB_WAK_STS (1 << 7)
+#define TCOSCI_STS (1 << 6)
+#define SWGPE_STS (1 << 2)
+#define HOT_PLUG_STS (1 << 1)
+#define GPE0_EN(x) (0x90 + (x * 4))
+#define WADT_en (1 << 18)
+#define GP27_EN (1 << 16)
+#define PME_B0_EN (1 << 13)
+#define ME_SCI_EN (1 << 12)
+#define PME_EN (1 << 11)
+#define BATLOW_EN (1 << 10)
+#define PCI_EXP_EN (1 << 9)
+#define TCOSCI_EN (1 << 6)
+#define SWGPE_EN (1 << 2)
+#define HOT_PLUG_EN (1 << 1)
+
+#define MAINBOARD_POWER_OFF 0
+#define MAINBOARD_POWER_ON 1
+#define MAINBOARD_POWER_KEEP 2
+
+#define SLEEP_STATE_S0 0
+#define SLEEP_STATE_S3 3
+#define SLEEP_STATE_S5 5
+
+struct chipset_power_state {
+ uint16_t pm1_sts;
+ uint16_t pm1_en;
+ uint32_t pm1_cnt;
+ uint16_t tco1_sts;
+ uint16_t tco2_sts;
+ uint32_t gpe0_sts[4];
+ uint32_t gpe0_en[4];
+ uint16_t gen_pmcon1;
+ uint16_t gen_pmcon2;
+ uint16_t gen_pmcon3;
+ int prev_sleep_state;
+ uint16_t hsio_version;
+ uint16_t hsio_checksum;
+};
+
+void power_state_get(struct udevice *pch_dev, struct chipset_power_state *ps);
+
+#endif
--
2.7.0.rc3.207.g0ac5344
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