[U-Boot] [PATCH v3 033/108] x86: power: Add an ACPI PMC uclass
Bin Meng
bmeng.cn at gmail.com
Mon Nov 4 08:02:51 UTC 2019
Hi Simon,
On Mon, Oct 21, 2019 at 11:40 AM Simon Glass <sjg at chromium.org> wrote:
>
> Intel x86 SoCs have a power manager/controller which handles several
> power-related aspects of the platform. Add a uclass for this, with a few
> useful operations.
>
> Signed-off-by: Simon Glass <sjg at chromium.org>
> ---
>
> Changes in v3:
> - Rename power-mgr uclass to acpi-pmc
>
> Changes in v2: None
>
> drivers/power/Kconfig | 2 +
> drivers/power/acpi_pmc/Kconfig | 25 +++
> drivers/power/acpi_pmc/Makefile | 5 +
> drivers/power/acpi_pmc/acpi-pmc-uclass.c | 191 +++++++++++++++++++++++
> include/dm/uclass-id.h | 1 +
> include/power/acpi_pmc.h | 185 ++++++++++++++++++++++
> 6 files changed, 409 insertions(+)
> create mode 100644 drivers/power/acpi_pmc/Kconfig
> create mode 100644 drivers/power/acpi_pmc/Makefile
> create mode 100644 drivers/power/acpi_pmc/acpi-pmc-uclass.c
> create mode 100644 include/power/acpi_pmc.h
>
> diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
> index 9495dca33b9..4b4f6d55568 100644
> --- a/drivers/power/Kconfig
> +++ b/drivers/power/Kconfig
> @@ -4,6 +4,8 @@ source "drivers/power/domain/Kconfig"
>
> source "drivers/power/pmic/Kconfig"
>
> +source "drivers/power/acpi_pmc/Kconfig"
> +
> source "drivers/power/regulator/Kconfig"
>
> choice
> diff --git a/drivers/power/acpi_pmc/Kconfig b/drivers/power/acpi_pmc/Kconfig
> new file mode 100644
> index 00000000000..472a61a9fd1
> --- /dev/null
> +++ b/drivers/power/acpi_pmc/Kconfig
> @@ -0,0 +1,25 @@
> +config ACPI_PMC
> + bool "Power Manager (x86 PMC) support"
> + help
> + Enable support for an x86-style power-management controller which
> + provides features including checking whether the system started from
> + resume, powering off the system and enabling/disabling the reset
> + mechanism.
> +
> +config SPL_ACPI_PMC
> + bool "Power Manager (x86 PMC) support in SPL"
> + default y if ACPI_PMC
> + help
> + Enable support for an x86-style power-management controller which
> + provides features including checking whether the system started from
> + resume, powering off the system and enabling/disabling the reset
> + mechanism.
> +
> +config TPL_ACPI_PMC
> + bool "Power Manager (x86 PMC) support in TPL"
> + default y if ACPI_PMC
> + help
> + Enable support for an x86-style power-management controller which
> + provides features including checking whether the system started from
> + resume, powering off the system and enabling/disabling the reset
> + mechanism.
> diff --git a/drivers/power/acpi_pmc/Makefile b/drivers/power/acpi_pmc/Makefile
> new file mode 100644
> index 00000000000..7c1ba05c9f3
> --- /dev/null
> +++ b/drivers/power/acpi_pmc/Makefile
> @@ -0,0 +1,5 @@
> +# SPDX-License-Identifier: GPL-2.0+
> +#
> +# Copyright 2019 Google LLC
> +
> +obj-$(CONFIG_$(SPL_TPL_)ACPI_PMC) += acpi-pmc-uclass.o
> diff --git a/drivers/power/acpi_pmc/acpi-pmc-uclass.c b/drivers/power/acpi_pmc/acpi-pmc-uclass.c
> new file mode 100644
> index 00000000000..8800afecf10
> --- /dev/null
> +++ b/drivers/power/acpi_pmc/acpi-pmc-uclass.c
> @@ -0,0 +1,191 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright 2019 Google LLC
> + */
> +
> +#define LOG_CATEGORY UCLASS_ACPI_PMC
> +
> +#include <common.h>
> +#include <acpi_s3.h>
> +#include <dm.h>
> +#include <log.h>
> +#include <asm/io.h>
> +#ifdef CONFIG_CREATE_ARCH_SYMLINK
> +#include <asm/arch/gpio.h>
> +#endif
> +#include <power/acpi_pmc.h>
> +
> +enum {
> + PM1_STS = 0x00,
> + PM1_EN = 0x02,
> + PM1_CNT = 0x04,
> +
> + GPE0_STS = 0x20,
> + GPE0_EN = 0x30,
> +};
> +
> +struct tco_regs {
> + u32 tco_rld;
> + u32 tco_sts;
> + u32 tco1_cnt;
> + u32 tco_tmr;
> +};
> +
> +enum {
> + TCO_STS_TIMEOUT = 1 << 3,
> + TCO_STS_SECOND_TO_STS = 1 << 17,
> + TCO1_CNT_HLT = 1 << 11,
> +};
> +
> +static void pmc_fill_pm_reg_info(struct udevice *dev)
> +{
> + struct acpi_pmc_upriv *upriv = dev_get_uclass_priv(dev);
> + int i;
> +
> + upriv->pm1_sts = inw(upriv->acpi_base + PM1_STS);
> + upriv->pm1_en = inw(upriv->acpi_base + PM1_EN);
> + upriv->pm1_cnt = inw(upriv->acpi_base + PM1_CNT);
> +
> + log_debug("pm1_sts: %04x pm1_en: %04x pm1_cnt: %08x\n",
> + upriv->pm1_sts, upriv->pm1_en, upriv->pm1_cnt);
> +
> + for (i = 0; i < GPE0_REG_MAX; i++) {
> + upriv->gpe0_sts[i] = inl(upriv->acpi_base + GPE0_STS + i * 4);
> + upriv->gpe0_en[i] = inl(upriv->acpi_base + GPE0_EN + i * 4);
> + log_debug("gpe0_sts[%d]: %08x gpe0_en[%d]: %08x\n", i,
> + upriv->gpe0_sts[i], i, upriv->gpe0_en[i]);
> + }
> +}
> +
> +int pmc_disable_tco_base(ulong tco_base)
> +{
> + struct tco_regs *regs = (struct tco_regs *)tco_base;
> +
> + debug("tco_base %lx = %x\n", (ulong)®s->tco1_cnt, TCO1_CNT_HLT);
> + setio_32(®s->tco1_cnt, TCO1_CNT_HLT);
> +
> + return 0;
> +}
> +
> +int pmc_init(struct udevice *dev)
> +{
> + const struct acpi_pmc_ops *ops = acpi_pmc_get_ops(dev);
> + int ret;
> +
> + pmc_fill_pm_reg_info(dev);
> + if (!ops->init)
> + return -ENOSYS;
> +
> + ret = ops->init(dev);
> + if (ret)
> + return log_msg_ret("Failed to init pmc", ret);
> +
> +#ifdef DEBUG
> + pmc_dump_info(dev);
> +#endif
> +
> + return 0;
> +}
I wonder shouldn't this be covered by the probe() method?
> +
> +int pmc_prev_sleep_state(struct udevice *dev)
> +{
> + struct acpi_pmc_upriv *upriv = dev_get_uclass_priv(dev);
> + const struct acpi_pmc_ops *ops = acpi_pmc_get_ops(dev);
> + int prev_sleep_state = ACPI_S0; /* Default to S0 */
> +
> + if (upriv->pm1_sts & WAK_STS) {
> + switch (acpi_sleep_from_pm1(upriv->pm1_cnt)) {
> + case ACPI_S3:
> + if (IS_ENABLED(HAVE_ACPI_RESUME))
> + prev_sleep_state = ACPI_S3;
> + break;
> + case ACPI_S5:
> + prev_sleep_state = ACPI_S5;
> + break;
> + default:
> + break;
> + }
> +
> + /* Clear SLP_TYP */
> + outl(upriv->pm1_cnt & ~SLP_TYP, upriv->acpi_base + PM1_CNT);
> + }
> +
> + if (!ops->prev_sleep_state)
> + return prev_sleep_state;
> +
> + return ops->prev_sleep_state(dev, prev_sleep_state);
> +}
> +
[snip]
Regards,
Bin
More information about the U-Boot
mailing list