// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2019 BayLibre, SAS
* Author: Neil Armstrong <narmstrong@baylibre.com>
*/
#include <linux/of_address.h>
#include <linux/platform_device.h>
#include <linux/pm_domain.h>
#include <linux/bitfield.h>
#include <linux/regmap.h>
#include <linux/mfd/syscon.h>
#include <linux/of_device.h>
#include <linux/reset-controller.h>
#include <linux/reset.h>
#include <linux/clk.h>
#include <dt-bindings/power/meson-g12a-power.h>
#include <dt-bindings/power/meson-sm1-power.h>
/* AO Offsets */
#define AO_RTI_GEN_PWR_SLEEP0 (0x3a << 2)
#define AO_RTI_GEN_PWR_ISO0 (0x3b << 2)
/* HHI Offsets */
#define HHI_MEM_PD_REG0 (0x40 << 2)
#define HHI_VPU_MEM_PD_REG0 (0x41 << 2)
#define HHI_VPU_MEM_PD_REG1 (0x42 << 2)
#define HHI_VPU_MEM_PD_REG3 (0x43 << 2)
#define HHI_VPU_MEM_PD_REG4 (0x44 << 2)
#define HHI_AUDIO_MEM_PD_REG0 (0x45 << 2)
#define HHI_NANOQ_MEM_PD_REG0 (0x46 << 2)
#define HHI_NANOQ_MEM_PD_REG1 (0x47 << 2)
#define HHI_VPU_MEM_PD_REG2 (0x4d << 2)
struct meson_ee_pwrc;
struct meson_ee_pwrc_domain;
struct meson_ee_pwrc_mem_domain {
unsigned int reg;
unsigned int mask;
};
struct meson_ee_pwrc_top_domain {
unsigned int sleep_reg;
unsigned int sleep_mask;
unsigned int iso_reg;
unsigned int iso_mask;
};
struct meson_ee_pwrc_domain_desc {
char *name;
unsigned int reset_names_count;
unsigned int clk_names_count;
struct meson_ee_pwrc_top_domain *top_pd;
unsigned int mem_pd_count;
struct meson_ee_pwrc_mem_domain *mem_pd;
bool (*get_power)(struct meson_ee_pwrc_domain *pwrc_domain);
};
struct meson_ee_pwrc_domain_data {
unsigned int count;
struct meson_ee_pwrc_domain_desc *domains;
};
/* TOP Power Domains */
static struct meson_ee_pwrc_top_domain g12a_pwrc_vpu = {
.sleep_reg = AO_RTI_GEN_PWR_SLEEP0,
.sleep_mask = BIT(8),
.iso_reg = AO_RTI_GEN_PWR_SLEEP0,
.iso_mask = BIT(9),
};
#define SM1_EE_PD(__bit) \
{ \
.sleep_reg = AO_RTI_GEN_PWR_SLEEP0, \
.sleep_mask = BIT(__bit), \
.iso_reg = AO_RTI_GEN_PWR_ISO0, \
.iso_mask = BIT(__bit), \
}
static struct meson_ee_pwrc_top_domain sm1_pwrc_vpu = SM1_EE_PD(8);
static struct meson_ee_pwrc_top_domain sm1_pwrc_nna = SM1_EE_PD(16);
static struct meson_ee_pwrc_top_domain sm1_pwrc_usb = SM1_EE_PD(17);
static struct meson_ee_pwrc_top_domain sm1_pwrc_pci = SM1_EE_PD(18);
static struct meson_ee_pwrc_top_domain sm1_pwrc_ge2d = SM1_EE_PD(19);
/* Memory PD Domains */
#define VPU_MEMPD(__reg) \
{ __reg, GENMASK(1, 0) }, \
{ __reg, GENMASK(3, 2) }, \
{ __reg, GENMASK(5, 4) }, \
{ __reg, GENMASK(7, 6) }, \
{ __reg, GENMASK(9, 8) }, \
{ __reg, GENMASK(11, 10) }, \
{ __reg, GENMASK(13, 12) }, \
{ __reg, GENMASK(15, 14) }, \
{ __reg, GENMASK(17, 16) }, \
{ __reg, GENMASK(19, 18) }, \
{ __reg, GENMASK(21, 20) }, \
{ __reg, GENMASK(23, 22) }, \
{ __reg, GENMASK(25, 24) }, \
{ __reg, GENMASK(27, 26) }, \
{ __reg, GENMASK(29, 28) }, \
{ __reg, GENMASK(31, 30) }
#define VPU_HHI_MEMPD(__reg) \
{ __reg, BIT(8) }, \
{ __reg, BIT(9) }, \
{ __reg, BIT(10) }, \
{ __reg, BIT(11) }, \
{ __reg, BIT(12) }, \
{ __reg, BIT(13) }, \
{ __reg, BIT(14) }, \
{ __reg, BIT(15) }
static struct meson_ee_pwrc_mem_domain g12a_pwrc_mem_vpu[] = {
VPU_MEMPD(HHI_VPU_MEM_PD_REG0),
VPU_MEMPD(HHI_VPU_MEM_PD_REG1),
VPU_MEMPD(HHI_VPU_MEM_PD_REG2),
VPU_HHI_MEMPD(HHI_MEM_PD_REG0),
};
static struct meson_ee_pwrc_mem_domain g12a_pwrc_mem_eth[] = {
{ HHI_MEM_PD_REG0, GENMASK(3, 2) },
};
static struct meson_ee_pwrc_mem_domain sm1_pwrc_mem_vpu[] = {
VPU_MEMPD(HHI_VPU_MEM_PD_REG0),
VPU_MEMPD(HHI_VPU_MEM_PD_REG1),
VPU_MEMPD(HHI_VPU_MEM_PD_REG2),
VPU_MEMPD(HHI_VPU_MEM_PD_REG3),
{ HHI_VPU_MEM_PD_REG4, GENMASK(1, 0) },
{ HHI_VPU_MEM_PD_REG4, GENMASK(3, 2) },
{ HHI_VPU_MEM_PD_REG4, GENMASK(5, 4) },
{ HHI_VPU_MEM_PD_REG4, GENMASK(7, 6) },
VPU_HHI_MEMPD(HHI_MEM_PD_REG0),
};
static struct meson_ee_pwrc_mem_domain sm1_pwrc_mem_nna[] = {
{ HHI_NANOQ_MEM_PD_REG0, 0xff },
{ HHI_NANOQ_MEM_PD_REG1, 0xff },
};
static struct meson_ee_pwrc_mem_domain sm1_pwrc_mem_usb[] = {
{ HHI_MEM_PD_REG0, GENMASK(31, 30) },
};
static struct meson_ee_pwrc_mem_domain sm1_pwrc_mem_pcie[] = {
{ HHI_MEM_PD_REG0, GENMASK(29, 26) },
};
static struct meson_ee_pwrc_mem_domain sm1_pwrc_mem_ge2d[] = {
{ HHI_MEM_PD_REG0, GENMASK(25, 18) },
};
static struct meson_ee_pwrc_mem_domain sm1_pwrc_mem_audio[] = {
{ HHI_MEM_PD_REG0, GENMASK(5, 4) },
{ HHI_AUDIO_MEM_PD_REG0, GENMASK(1, 0) },
{ HHI_AUDIO_MEM_PD_REG0, GENMASK(3, 2) },
{ HHI_AUDIO_MEM_PD_REG0, GENMASK(5, 4) },
{ HHI_AUDIO_MEM_PD_REG0, GENMASK(7, 6) },
{ HHI_AUDIO_MEM_PD_REG0, GENMASK(13, 12) },
{ HHI_AUDIO_MEM_PD_REG0, GENMASK(15, 14) },
{ HHI_AUDIO_MEM_PD_REG0, GENMASK(17, 16) },
{ HHI_AUDIO_MEM_PD_REG0, GENMASK(19, 18) },
{ HHI_AUDIO_MEM_PD_REG0, GENMASK(21, 20) },
{ HHI_AUDIO_MEM_PD_REG0, GENMASK(23, 22) },
{ HHI_AUDIO_MEM_PD_REG0, GENMASK(25, 24) },
{ HHI_AUDIO_MEM_PD_REG0, GENMASK(27, 26) },
};
#define VPU_PD(__name, __top_pd, __mem, __get_power, __resets, __clks) \
{ \
.name = __name, \
.reset_names_count = __resets, \
.clk_names_count = __clks, \
.top_pd = __top_pd, \
.mem_pd_count = ARRAY_SIZE(__mem), \
.mem_pd = __mem, \
.get_power = __get_power, \
}
#define TOP_PD(__name, __top_pd, __mem, __get_power) \
{ \
.name = __name, \
.top_pd = __top_pd, \
.mem_pd_count = ARRAY_SIZE(__mem), \
.mem_pd = __mem, \
.get_power = __get_power, \
}
#define MEM_PD(__name, __mem) \
TOP_PD(__name, NULL, __mem, NULL)
static bool pwrc_ee_get_power(struct meson_ee_pwrc_domain *pwrc_domain);
static struct meson_ee_pwrc_domain_desc g12a_pwrc_domains[] = {
[PWRC_G12A_VPU_ID] = VPU_PD("VPU", &g12a_pwrc_vpu, g12a_pwrc_mem_vpu,
pwrc_ee_get_power, 11, 2),
[PWRC_G12A_ETH_ID] = MEM_PD("ETH", g12a_pwrc_mem_eth),
};
static struct meson_ee_pwrc_domain_desc sm1_pwrc_domains[] = {
[PWRC_SM1_VPU_ID] = VPU_PD("VPU", &sm1_pwrc_vpu, sm1_pwrc_mem_vpu,
pwrc_ee_get_power, 11, 2),
[PWRC_SM1_NNA_ID] = TOP_PD("NNA", &sm1_pwrc_nna, sm1_pwrc_mem_nna,
pwrc_ee_get_power),
[PWRC_SM1_USB_ID] = TOP_PD("USB", &sm1_pwrc_usb, sm1_pwrc_mem_usb,
pwrc_ee_get_power),
[PWRC_SM1_PCIE_ID] = TOP_PD("PCI", &sm1_pwrc_pci, sm1_pwrc_mem_pcie,
pwrc_ee_get_power),
[PWRC_SM1_GE2D_ID] = TOP_PD("GE2D", &sm1_pwrc_ge2d, sm1_pwrc_mem_ge2d,
pwrc_ee_get_power),
[PWRC_SM1_AUDIO_ID] = MEM_PD("AUDIO", sm1_pwrc_mem_audio),
[PWRC_SM1_ETH_ID] = MEM_PD("ETH", g12a_pwrc_mem_eth),
};
struct meson_ee_pwrc_domain {
struct generic_pm_domain base;
bool enabled;
struct meson_ee_pwrc *pwrc;
struct meson_ee_pwrc_domain_desc desc;
struct clk_bulk_data *clks;
int num_clks;
struct reset_control *rstc;
int num_rstc;
};
struct meson_ee_pwrc {
struct regmap *regmap_ao;
struct regmap *regmap_hhi;
struct meson_ee_pwrc_domain *domains;
struct genpd_onecell_data xlate;
};
static bool pwrc_ee_get_power(struct meson_ee_pwrc_domain *pwrc_domain)
{
u32 reg;
regmap_read(pwrc_domain->pwrc->regmap_ao,
pwrc_domain->desc.top_pd->sleep_reg, ®);
return (reg & pwrc_domain->desc.top_pd->sleep_mask);
}
static int meson_ee_pwrc_off(struct generic_pm_domain *domain)
{
struct meson_ee_pwrc_domain *pwrc_domain =
container_of(domain, struct meson_ee_pwrc_domain, base);
int i;
if (pwrc_domain->desc.top_pd)
regmap_update_bits(pwrc_domain->pwrc->regmap_ao,
pwrc_domain->desc.top_pd->sleep_reg,
pwrc_domain->desc.top_pd->sleep_mask,
pwrc_domain->desc.top_pd->sleep_mask);
udelay(20);
for (i = 0 ; i < pwrc_domain->desc.mem_pd_count ; ++i)
regmap_update_bits(pwrc_domain->pwrc->regmap_hhi,
pwrc_domain->desc.mem_pd[i].reg,
pwrc_domain->desc.mem_pd[i].mask,
pwrc_domain->desc.mem_pd[i].mask);
udelay(20);
if (pwrc_domain->desc.top_pd)
regmap_update_bits(pwrc_domain->pwrc->regmap_ao,
pwrc_domain->desc.top_pd->iso_reg,
pwrc_domain->desc.top_pd->iso_mask,
pwrc_domain->desc.top_pd->iso_mask);
if (pwrc_domain->num_clks) {
msleep(20);
clk_bulk_disable_unprepare(pwrc_domain->num_clks,
pwrc_domain->clks);
}
return 0;
}
static int meson_ee_pwrc_on(struct generic_pm_domain *domain)
{
struct meson_ee_pwrc_domain *pwrc_domain =
container_of(domain, struct meson_ee_pwrc_domain, base);
int i, ret;
if (pwrc_domain->desc.top_pd)
regmap_update_bits(pwrc_domain->pwrc->regmap_ao,
pwrc_domain->desc.top_pd->sleep_reg,
pwrc_domain->desc.top_pd->sleep_mask, 0);
udelay(20);
for (i = 0 ; i < pwrc_domain->desc.mem_pd_count ; ++i)
regmap_update_bits(pwrc_domain->pwrc->regmap_hhi,
pwrc_domain->desc.mem_pd[i].reg,
pwrc_domain->desc.mem_pd[i].mask, 0);
udelay(20);
ret = reset_control_assert(pwrc_domain->rstc);
if (ret)
return ret;
if (pwrc_domain->desc.top_pd)
regmap_update_bits(pwrc_domain->pwrc->regmap_ao,
pwrc_domain->desc.top_pd->iso_reg,
pwrc_domain->desc.top_pd->iso_mask, 0);
ret = reset_control_deassert(pwrc_domain->rstc);
if (ret)
return ret;
return clk_bulk_prepare_enable(pwrc_domain->num_clks,
pwrc_domain->clks);
}
static int meson_ee_pwrc_init_domain(struct platform_device *pdev,
struct meson_ee_pwrc *pwrc,
struct meson_ee_pwrc_domain *dom)
{
int ret;
dom->pwrc = pwrc;
dom->num_rstc = dom->desc.reset_names_count;
dom->num_clks = dom->desc.clk_names_count;
if (dom->num_rstc) {
int count = reset_control_get_count(&pdev->dev);
if (count != dom->num_rstc)
dev_warn(&pdev->dev, "Invalid resets count %d for domain %s\n",
count, dom->desc.name);
dom->rstc = devm_reset_control_array_get(&pdev->dev, false,
false);
if (IS_ERR(dom->rstc))
return PTR_ERR(dom->rstc);
}
if (dom->num_clks) {
int ret = devm_clk_bulk_get_all(&pdev->dev, &dom->clks);
if (ret < 0)
return ret;
if (dom->num_clks != ret) {
dev_warn(&pdev->dev, "Invalid clocks count %d for domain %s\n",
ret, dom->desc.name);
dom->num_clks = ret;
}
}
dom->base.name = dom->desc.name;
dom->base.power_on = meson_ee_pwrc_on;
dom->base.power_off = meson_ee_pwrc_off;
/*
* TOFIX: This is a special case for the VPU power domain, which can
* be enabled previously by the bootloader. In this case the VPU
* pipeline may be functional but no driver maybe never attach
* to this power domain, and if the domain is disabled it could
* cause system errors. This is why the pm_domain_always_on_gov
* is used here.
* For the same reason, the clocks should be enabled in case
* 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)) {
ret = clk_bulk_prepare_enable(dom->num_clks, dom->clks);
if (ret)
return ret;
ret = pm_genpd_init(&dom->base, &pm_domain_always_on_gov,
false);
if (ret)
return ret;
} else {
ret = pm_genpd_init(&dom->base, NULL,
(dom->desc.get_power ?
dom->desc.get_power(dom) : true));
if (ret)
return ret;
}
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;
}
return of_genpd_add_provider_onecell(pdev->dev.of_node, &pwrc->xlate);
}
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);
