soc: amlogic: Add support for Everything-Else power domains controller
Add support for the General Purpose Amlogic Everything-Else Power controller, with the first support for G12A and SM1 SoCs dedicated to the VPU, PCIe, USB, NNA, GE2D and Ethernet Power Domains. Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Reviewed-by: Kevin Hilman <khilman@baylibre.com> Tested-by: Kevin Hilman <khilman@baylibre.com> Signed-off-by: Kevin Hilman <khilman@baylibre.com>
This commit is contained in:
Neil Armstrong
Kevin Hilman
parent
49ed86f503
commit
eef3c2ba0a
@ -37,6 +37,17 @@ config MESON_GX_PM_DOMAINS
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Say yes to expose Amlogic Meson GX Power Domains as
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Generic Power Domains.
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config MESON_EE_PM_DOMAINS
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bool "Amlogic Meson Everything-Else Power Domains driver"
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depends on ARCH_MESON || COMPILE_TEST
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depends on PM && OF
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default ARCH_MESON
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select PM_GENERIC_DOMAINS
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select PM_GENERIC_DOMAINS_OF
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help
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Say yes to expose Amlogic Meson Everything-Else Power Domains as
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Generic Power Domains.
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config MESON_MX_SOCINFO
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bool "Amlogic Meson MX SoC Information driver"
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depends on ARCH_MESON || COMPILE_TEST
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@ -4,3 +4,4 @@ obj-$(CONFIG_MESON_CLK_MEASURE) += meson-clk-measure.o
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obj-$(CONFIG_MESON_GX_SOCINFO) += meson-gx-socinfo.o
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obj-$(CONFIG_MESON_GX_PM_DOMAINS) += meson-gx-pwrc-vpu.o
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obj-$(CONFIG_MESON_MX_SOCINFO) += meson-mx-socinfo.o
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obj-$(CONFIG_MESON_EE_PM_DOMAINS) += meson-ee-pwrc.o
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492
drivers/soc/amlogic/meson-ee-pwrc.c
Normal file
492
drivers/soc/amlogic/meson-ee-pwrc.c
Normal file
@ -0,0 +1,492 @@
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2019 BayLibre, SAS
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* Author: Neil Armstrong <narmstrong@baylibre.com>
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*/
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#include <linux/of_address.h>
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#include <linux/platform_device.h>
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#include <linux/pm_domain.h>
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#include <linux/bitfield.h>
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#include <linux/regmap.h>
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#include <linux/mfd/syscon.h>
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#include <linux/of_device.h>
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#include <linux/reset-controller.h>
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#include <linux/reset.h>
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#include <linux/clk.h>
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#include <dt-bindings/power/meson-g12a-power.h>
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#include <dt-bindings/power/meson-sm1-power.h>
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/* AO Offsets */
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#define AO_RTI_GEN_PWR_SLEEP0 (0x3a << 2)
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#define AO_RTI_GEN_PWR_ISO0 (0x3b << 2)
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/* HHI Offsets */
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#define HHI_MEM_PD_REG0 (0x40 << 2)
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#define HHI_VPU_MEM_PD_REG0 (0x41 << 2)
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#define HHI_VPU_MEM_PD_REG1 (0x42 << 2)
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#define HHI_VPU_MEM_PD_REG3 (0x43 << 2)
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#define HHI_VPU_MEM_PD_REG4 (0x44 << 2)
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#define HHI_AUDIO_MEM_PD_REG0 (0x45 << 2)
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#define HHI_NANOQ_MEM_PD_REG0 (0x46 << 2)
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#define HHI_NANOQ_MEM_PD_REG1 (0x47 << 2)
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#define HHI_VPU_MEM_PD_REG2 (0x4d << 2)
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struct meson_ee_pwrc;
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struct meson_ee_pwrc_domain;
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struct meson_ee_pwrc_mem_domain {
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unsigned int reg;
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unsigned int mask;
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};
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struct meson_ee_pwrc_top_domain {
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unsigned int sleep_reg;
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unsigned int sleep_mask;
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unsigned int iso_reg;
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unsigned int iso_mask;
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};
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struct meson_ee_pwrc_domain_desc {
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char *name;
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unsigned int reset_names_count;
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unsigned int clk_names_count;
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struct meson_ee_pwrc_top_domain *top_pd;
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unsigned int mem_pd_count;
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struct meson_ee_pwrc_mem_domain *mem_pd;
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bool (*get_power)(struct meson_ee_pwrc_domain *pwrc_domain);
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};
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struct meson_ee_pwrc_domain_data {
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unsigned int count;
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struct meson_ee_pwrc_domain_desc *domains;
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};
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/* TOP Power Domains */
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static struct meson_ee_pwrc_top_domain g12a_pwrc_vpu = {
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.sleep_reg = AO_RTI_GEN_PWR_SLEEP0,
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.sleep_mask = BIT(8),
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.iso_reg = AO_RTI_GEN_PWR_SLEEP0,
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.iso_mask = BIT(9),
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};
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#define SM1_EE_PD(__bit) \
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{ \
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.sleep_reg = AO_RTI_GEN_PWR_SLEEP0, \
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.sleep_mask = BIT(__bit), \
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.iso_reg = AO_RTI_GEN_PWR_ISO0, \
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.iso_mask = BIT(__bit), \
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}
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static struct meson_ee_pwrc_top_domain sm1_pwrc_vpu = SM1_EE_PD(8);
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static struct meson_ee_pwrc_top_domain sm1_pwrc_nna = SM1_EE_PD(16);
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static struct meson_ee_pwrc_top_domain sm1_pwrc_usb = SM1_EE_PD(17);
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static struct meson_ee_pwrc_top_domain sm1_pwrc_pci = SM1_EE_PD(18);
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static struct meson_ee_pwrc_top_domain sm1_pwrc_ge2d = SM1_EE_PD(19);
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/* Memory PD Domains */
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#define VPU_MEMPD(__reg) \
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{ __reg, GENMASK(1, 0) }, \
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{ __reg, GENMASK(3, 2) }, \
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{ __reg, GENMASK(5, 4) }, \
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{ __reg, GENMASK(7, 6) }, \
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{ __reg, GENMASK(9, 8) }, \
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{ __reg, GENMASK(11, 10) }, \
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{ __reg, GENMASK(13, 12) }, \
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{ __reg, GENMASK(15, 14) }, \
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{ __reg, GENMASK(17, 16) }, \
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{ __reg, GENMASK(19, 18) }, \
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{ __reg, GENMASK(21, 20) }, \
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{ __reg, GENMASK(23, 22) }, \
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{ __reg, GENMASK(25, 24) }, \
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{ __reg, GENMASK(27, 26) }, \
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{ __reg, GENMASK(29, 28) }, \
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{ __reg, GENMASK(31, 30) }
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#define VPU_HHI_MEMPD(__reg) \
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{ __reg, BIT(8) }, \
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{ __reg, BIT(9) }, \
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{ __reg, BIT(10) }, \
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{ __reg, BIT(11) }, \
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{ __reg, BIT(12) }, \
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{ __reg, BIT(13) }, \
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{ __reg, BIT(14) }, \
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{ __reg, BIT(15) }
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static struct meson_ee_pwrc_mem_domain g12a_pwrc_mem_vpu[] = {
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VPU_MEMPD(HHI_VPU_MEM_PD_REG0),
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VPU_MEMPD(HHI_VPU_MEM_PD_REG1),
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VPU_MEMPD(HHI_VPU_MEM_PD_REG2),
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VPU_HHI_MEMPD(HHI_MEM_PD_REG0),
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};
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static struct meson_ee_pwrc_mem_domain g12a_pwrc_mem_eth[] = {
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{ HHI_MEM_PD_REG0, GENMASK(3, 2) },
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};
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static struct meson_ee_pwrc_mem_domain sm1_pwrc_mem_vpu[] = {
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VPU_MEMPD(HHI_VPU_MEM_PD_REG0),
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VPU_MEMPD(HHI_VPU_MEM_PD_REG1),
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VPU_MEMPD(HHI_VPU_MEM_PD_REG2),
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VPU_MEMPD(HHI_VPU_MEM_PD_REG3),
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{ HHI_VPU_MEM_PD_REG4, GENMASK(1, 0) },
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{ HHI_VPU_MEM_PD_REG4, GENMASK(3, 2) },
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{ HHI_VPU_MEM_PD_REG4, GENMASK(5, 4) },
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{ HHI_VPU_MEM_PD_REG4, GENMASK(7, 6) },
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VPU_HHI_MEMPD(HHI_MEM_PD_REG0),
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};
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static struct meson_ee_pwrc_mem_domain sm1_pwrc_mem_nna[] = {
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{ HHI_NANOQ_MEM_PD_REG0, 0xff },
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{ HHI_NANOQ_MEM_PD_REG1, 0xff },
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};
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static struct meson_ee_pwrc_mem_domain sm1_pwrc_mem_usb[] = {
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{ HHI_MEM_PD_REG0, GENMASK(31, 30) },
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};
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static struct meson_ee_pwrc_mem_domain sm1_pwrc_mem_pcie[] = {
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{ HHI_MEM_PD_REG0, GENMASK(29, 26) },
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};
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static struct meson_ee_pwrc_mem_domain sm1_pwrc_mem_ge2d[] = {
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{ HHI_MEM_PD_REG0, GENMASK(25, 18) },
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};
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static struct meson_ee_pwrc_mem_domain sm1_pwrc_mem_audio[] = {
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{ HHI_MEM_PD_REG0, GENMASK(5, 4) },
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{ HHI_AUDIO_MEM_PD_REG0, GENMASK(1, 0) },
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{ HHI_AUDIO_MEM_PD_REG0, GENMASK(3, 2) },
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{ HHI_AUDIO_MEM_PD_REG0, GENMASK(5, 4) },
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{ HHI_AUDIO_MEM_PD_REG0, GENMASK(7, 6) },
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{ HHI_AUDIO_MEM_PD_REG0, GENMASK(13, 12) },
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{ HHI_AUDIO_MEM_PD_REG0, GENMASK(15, 14) },
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{ HHI_AUDIO_MEM_PD_REG0, GENMASK(17, 16) },
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{ HHI_AUDIO_MEM_PD_REG0, GENMASK(19, 18) },
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{ HHI_AUDIO_MEM_PD_REG0, GENMASK(21, 20) },
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{ HHI_AUDIO_MEM_PD_REG0, GENMASK(23, 22) },
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{ HHI_AUDIO_MEM_PD_REG0, GENMASK(25, 24) },
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{ HHI_AUDIO_MEM_PD_REG0, GENMASK(27, 26) },
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};
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#define VPU_PD(__name, __top_pd, __mem, __get_power, __resets, __clks) \
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{ \
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.name = __name, \
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.reset_names_count = __resets, \
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.clk_names_count = __clks, \
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.top_pd = __top_pd, \
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.mem_pd_count = ARRAY_SIZE(__mem), \
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.mem_pd = __mem, \
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.get_power = __get_power, \
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}
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#define TOP_PD(__name, __top_pd, __mem, __get_power) \
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{ \
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.name = __name, \
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.top_pd = __top_pd, \
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.mem_pd_count = ARRAY_SIZE(__mem), \
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.mem_pd = __mem, \
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.get_power = __get_power, \
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}
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#define MEM_PD(__name, __mem) \
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TOP_PD(__name, NULL, __mem, NULL)
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static bool pwrc_ee_get_power(struct meson_ee_pwrc_domain *pwrc_domain);
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static struct meson_ee_pwrc_domain_desc g12a_pwrc_domains[] = {
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[PWRC_G12A_VPU_ID] = VPU_PD("VPU", &g12a_pwrc_vpu, g12a_pwrc_mem_vpu,
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pwrc_ee_get_power, 11, 2),
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[PWRC_G12A_ETH_ID] = MEM_PD("ETH", g12a_pwrc_mem_eth),
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};
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static struct meson_ee_pwrc_domain_desc sm1_pwrc_domains[] = {
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[PWRC_SM1_VPU_ID] = VPU_PD("VPU", &sm1_pwrc_vpu, sm1_pwrc_mem_vpu,
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pwrc_ee_get_power, 11, 2),
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[PWRC_SM1_NNA_ID] = TOP_PD("NNA", &sm1_pwrc_nna, sm1_pwrc_mem_nna,
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pwrc_ee_get_power),
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[PWRC_SM1_USB_ID] = TOP_PD("USB", &sm1_pwrc_usb, sm1_pwrc_mem_usb,
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pwrc_ee_get_power),
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[PWRC_SM1_PCIE_ID] = TOP_PD("PCI", &sm1_pwrc_pci, sm1_pwrc_mem_pcie,
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pwrc_ee_get_power),
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[PWRC_SM1_GE2D_ID] = TOP_PD("GE2D", &sm1_pwrc_ge2d, sm1_pwrc_mem_ge2d,
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pwrc_ee_get_power),
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[PWRC_SM1_AUDIO_ID] = MEM_PD("AUDIO", sm1_pwrc_mem_audio),
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[PWRC_SM1_ETH_ID] = MEM_PD("ETH", g12a_pwrc_mem_eth),
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};
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struct meson_ee_pwrc_domain {
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struct generic_pm_domain base;
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bool enabled;
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struct meson_ee_pwrc *pwrc;
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struct meson_ee_pwrc_domain_desc desc;
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struct clk_bulk_data *clks;
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int num_clks;
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struct reset_control *rstc;
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int num_rstc;
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};
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struct meson_ee_pwrc {
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struct regmap *regmap_ao;
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struct regmap *regmap_hhi;
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struct meson_ee_pwrc_domain *domains;
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struct genpd_onecell_data xlate;
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};
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static bool pwrc_ee_get_power(struct meson_ee_pwrc_domain *pwrc_domain)
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{
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u32 reg;
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regmap_read(pwrc_domain->pwrc->regmap_ao,
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pwrc_domain->desc.top_pd->sleep_reg, ®);
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return (reg & pwrc_domain->desc.top_pd->sleep_mask);
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}
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static int meson_ee_pwrc_off(struct generic_pm_domain *domain)
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{
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struct meson_ee_pwrc_domain *pwrc_domain =
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container_of(domain, struct meson_ee_pwrc_domain, base);
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int i;
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if (pwrc_domain->desc.top_pd)
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regmap_update_bits(pwrc_domain->pwrc->regmap_ao,
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pwrc_domain->desc.top_pd->sleep_reg,
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pwrc_domain->desc.top_pd->sleep_mask,
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pwrc_domain->desc.top_pd->sleep_mask);
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udelay(20);
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for (i = 0 ; i < pwrc_domain->desc.mem_pd_count ; ++i)
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regmap_update_bits(pwrc_domain->pwrc->regmap_hhi,
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pwrc_domain->desc.mem_pd[i].reg,
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pwrc_domain->desc.mem_pd[i].mask,
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pwrc_domain->desc.mem_pd[i].mask);
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udelay(20);
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if (pwrc_domain->desc.top_pd)
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regmap_update_bits(pwrc_domain->pwrc->regmap_ao,
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pwrc_domain->desc.top_pd->iso_reg,
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pwrc_domain->desc.top_pd->iso_mask,
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pwrc_domain->desc.top_pd->iso_mask);
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if (pwrc_domain->num_clks) {
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msleep(20);
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clk_bulk_disable_unprepare(pwrc_domain->num_clks,
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pwrc_domain->clks);
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}
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return 0;
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}
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static int meson_ee_pwrc_on(struct generic_pm_domain *domain)
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{
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struct meson_ee_pwrc_domain *pwrc_domain =
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container_of(domain, struct meson_ee_pwrc_domain, base);
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int i, ret;
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if (pwrc_domain->desc.top_pd)
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regmap_update_bits(pwrc_domain->pwrc->regmap_ao,
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pwrc_domain->desc.top_pd->sleep_reg,
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pwrc_domain->desc.top_pd->sleep_mask, 0);
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udelay(20);
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for (i = 0 ; i < pwrc_domain->desc.mem_pd_count ; ++i)
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regmap_update_bits(pwrc_domain->pwrc->regmap_hhi,
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pwrc_domain->desc.mem_pd[i].reg,
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pwrc_domain->desc.mem_pd[i].mask, 0);
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udelay(20);
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ret = reset_control_assert(pwrc_domain->rstc);
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if (ret)
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return ret;
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if (pwrc_domain->desc.top_pd)
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regmap_update_bits(pwrc_domain->pwrc->regmap_ao,
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pwrc_domain->desc.top_pd->iso_reg,
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pwrc_domain->desc.top_pd->iso_mask, 0);
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ret = reset_control_deassert(pwrc_domain->rstc);
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if (ret)
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return ret;
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return clk_bulk_prepare_enable(pwrc_domain->num_clks,
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pwrc_domain->clks);
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}
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static int meson_ee_pwrc_init_domain(struct platform_device *pdev,
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struct meson_ee_pwrc *pwrc,
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struct meson_ee_pwrc_domain *dom)
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{
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dom->pwrc = pwrc;
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dom->num_rstc = dom->desc.reset_names_count;
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dom->num_clks = dom->desc.clk_names_count;
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if (dom->num_rstc) {
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int count = reset_control_get_count(&pdev->dev);
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if (count != dom->num_rstc)
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dev_warn(&pdev->dev, "Invalid resets count %d for domain %s\n",
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count, dom->desc.name);
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dom->rstc = devm_reset_control_array_get(&pdev->dev, false,
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false);
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if (IS_ERR(dom->rstc))
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return PTR_ERR(dom->rstc);
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}
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if (dom->num_clks) {
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int ret = devm_clk_bulk_get_all(&pdev->dev, &dom->clks);
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if (ret < 0)
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return ret;
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if (dom->num_clks != ret) {
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dev_warn(&pdev->dev, "Invalid clocks count %d for domain %s\n",
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ret, dom->desc.name);
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dom->num_clks = ret;
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}
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}
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dom->base.name = dom->desc.name;
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dom->base.power_on = meson_ee_pwrc_on;
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dom->base.power_off = meson_ee_pwrc_off;
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/*
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* TOFIX: This is a special case for the VPU power domain, which can
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* be enabled previously by the bootloader. In this case the VPU
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* pipeline may be functional but no driver maybe never attach
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* to this power domain, and if the domain is disabled it could
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* cause system errors. This is why the pm_domain_always_on_gov
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* is used here.
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* For the same reason, the clocks should be enabled in case
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||||
* we need to power the domain off, otherwise the internal clocks
|
||||
* prepare/enable counters won't be in sync.
|
||||
*/
|
||||
if (dom->num_clks && dom->desc.get_power && !dom->desc.get_power(dom)) {
|
||||
int ret = clk_bulk_prepare_enable(dom->num_clks, dom->clks);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
pm_genpd_init(&dom->base, &pm_domain_always_on_gov, false);
|
||||
} else
|
||||
pm_genpd_init(&dom->base, NULL,
|
||||
(dom->desc.get_power ?
|
||||
dom->desc.get_power(dom) : true));
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int meson_ee_pwrc_probe(struct platform_device *pdev)
|
||||
{
|
||||
const struct meson_ee_pwrc_domain_data *match;
|
||||
struct regmap *regmap_ao, *regmap_hhi;
|
||||
struct meson_ee_pwrc *pwrc;
|
||||
int i, ret;
|
||||
|
||||
match = of_device_get_match_data(&pdev->dev);
|
||||
if (!match) {
|
||||
dev_err(&pdev->dev, "failed to get match data\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
pwrc = devm_kzalloc(&pdev->dev, sizeof(*pwrc), GFP_KERNEL);
|
||||
if (!pwrc)
|
||||
return -ENOMEM;
|
||||
|
||||
pwrc->xlate.domains = devm_kcalloc(&pdev->dev, match->count,
|
||||
sizeof(*pwrc->xlate.domains),
|
||||
GFP_KERNEL);
|
||||
if (!pwrc->xlate.domains)
|
||||
return -ENOMEM;
|
||||
|
||||
pwrc->domains = devm_kcalloc(&pdev->dev, match->count,
|
||||
sizeof(*pwrc->domains), GFP_KERNEL);
|
||||
if (!pwrc->domains)
|
||||
return -ENOMEM;
|
||||
|
||||
pwrc->xlate.num_domains = match->count;
|
||||
|
||||
regmap_hhi = syscon_node_to_regmap(of_get_parent(pdev->dev.of_node));
|
||||
if (IS_ERR(regmap_hhi)) {
|
||||
dev_err(&pdev->dev, "failed to get HHI regmap\n");
|
||||
return PTR_ERR(regmap_hhi);
|
||||
}
|
||||
|
||||
regmap_ao = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
|
||||
"amlogic,ao-sysctrl");
|
||||
if (IS_ERR(regmap_ao)) {
|
||||
dev_err(&pdev->dev, "failed to get AO regmap\n");
|
||||
return PTR_ERR(regmap_ao);
|
||||
}
|
||||
|
||||
pwrc->regmap_ao = regmap_ao;
|
||||
pwrc->regmap_hhi = regmap_hhi;
|
||||
|
||||
platform_set_drvdata(pdev, pwrc);
|
||||
|
||||
for (i = 0 ; i < match->count ; ++i) {
|
||||
struct meson_ee_pwrc_domain *dom = &pwrc->domains[i];
|
||||
|
||||
memcpy(&dom->desc, &match->domains[i], sizeof(dom->desc));
|
||||
|
||||
ret = meson_ee_pwrc_init_domain(pdev, pwrc, dom);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
pwrc->xlate.domains[i] = &dom->base;
|
||||
}
|
||||
|
||||
of_genpd_add_provider_onecell(pdev->dev.of_node, &pwrc->xlate);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void meson_ee_pwrc_shutdown(struct platform_device *pdev)
|
||||
{
|
||||
struct meson_ee_pwrc *pwrc = platform_get_drvdata(pdev);
|
||||
int i;
|
||||
|
||||
for (i = 0 ; i < pwrc->xlate.num_domains ; ++i) {
|
||||
struct meson_ee_pwrc_domain *dom = &pwrc->domains[i];
|
||||
|
||||
if (dom->desc.get_power && !dom->desc.get_power(dom))
|
||||
meson_ee_pwrc_off(&dom->base);
|
||||
}
|
||||
}
|
||||
|
||||
static struct meson_ee_pwrc_domain_data meson_ee_g12a_pwrc_data = {
|
||||
.count = ARRAY_SIZE(g12a_pwrc_domains),
|
||||
.domains = g12a_pwrc_domains,
|
||||
};
|
||||
|
||||
static struct meson_ee_pwrc_domain_data meson_ee_sm1_pwrc_data = {
|
||||
.count = ARRAY_SIZE(sm1_pwrc_domains),
|
||||
.domains = sm1_pwrc_domains,
|
||||
};
|
||||
|
||||
static const struct of_device_id meson_ee_pwrc_match_table[] = {
|
||||
{
|
||||
.compatible = "amlogic,meson-g12a-pwrc",
|
||||
.data = &meson_ee_g12a_pwrc_data,
|
||||
},
|
||||
{
|
||||
.compatible = "amlogic,meson-sm1-pwrc",
|
||||
.data = &meson_ee_sm1_pwrc_data,
|
||||
},
|
||||
{ /* sentinel */ }
|
||||
};
|
||||
|
||||
static struct platform_driver meson_ee_pwrc_driver = {
|
||||
.probe = meson_ee_pwrc_probe,
|
||||
.shutdown = meson_ee_pwrc_shutdown,
|
||||
.driver = {
|
||||
.name = "meson_ee_pwrc",
|
||||
.of_match_table = meson_ee_pwrc_match_table,
|
||||
},
|
||||
};
|
||||
builtin_platform_driver(meson_ee_pwrc_driver);
|
||||
Loading…
Reference in New Issue
Block a user