377 lines
8.0 KiB
C
377 lines
8.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* BCM63xx Power Domain Controller Driver
|
|
*
|
|
* Copyright (C) 2020 Álvaro Fernández Rojas <noltari@gmail.com>
|
|
*/
|
|
|
|
#include <dt-bindings/soc/bcm6318-pm.h>
|
|
#include <dt-bindings/soc/bcm6328-pm.h>
|
|
#include <dt-bindings/soc/bcm6362-pm.h>
|
|
#include <dt-bindings/soc/bcm63268-pm.h>
|
|
#include <linux/io.h>
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/pm_domain.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_device.h>
|
|
|
|
struct bcm63xx_power_dev {
|
|
struct generic_pm_domain genpd;
|
|
struct bcm63xx_power *power;
|
|
uint32_t mask;
|
|
};
|
|
|
|
struct bcm63xx_power {
|
|
void __iomem *base;
|
|
spinlock_t lock;
|
|
struct bcm63xx_power_dev *dev;
|
|
struct genpd_onecell_data genpd_data;
|
|
struct generic_pm_domain **genpd;
|
|
};
|
|
|
|
struct bcm63xx_power_data {
|
|
const char * const name;
|
|
uint8_t bit;
|
|
unsigned int flags;
|
|
};
|
|
|
|
static int bcm63xx_power_get_state(struct bcm63xx_power_dev *pmd, bool *is_on)
|
|
{
|
|
struct bcm63xx_power *power = pmd->power;
|
|
|
|
if (!pmd->mask) {
|
|
*is_on = false;
|
|
return -EINVAL;
|
|
}
|
|
|
|
*is_on = !(__raw_readl(power->base) & pmd->mask);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bcm63xx_power_set_state(struct bcm63xx_power_dev *pmd, bool on)
|
|
{
|
|
struct bcm63xx_power *power = pmd->power;
|
|
unsigned long flags;
|
|
uint32_t val;
|
|
|
|
if (!pmd->mask)
|
|
return -EINVAL;
|
|
|
|
spin_lock_irqsave(&power->lock, flags);
|
|
val = __raw_readl(power->base);
|
|
if (on)
|
|
val &= ~pmd->mask;
|
|
else
|
|
val |= pmd->mask;
|
|
__raw_writel(val, power->base);
|
|
spin_unlock_irqrestore(&power->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bcm63xx_power_on(struct generic_pm_domain *genpd)
|
|
{
|
|
struct bcm63xx_power_dev *pmd = container_of(genpd,
|
|
struct bcm63xx_power_dev, genpd);
|
|
|
|
return bcm63xx_power_set_state(pmd, true);
|
|
}
|
|
|
|
static int bcm63xx_power_off(struct generic_pm_domain *genpd)
|
|
{
|
|
struct bcm63xx_power_dev *pmd = container_of(genpd,
|
|
struct bcm63xx_power_dev, genpd);
|
|
|
|
return bcm63xx_power_set_state(pmd, false);
|
|
}
|
|
|
|
static int bcm63xx_power_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct device_node *np = dev->of_node;
|
|
const struct bcm63xx_power_data *entry, *table;
|
|
struct bcm63xx_power *power;
|
|
unsigned int ndom;
|
|
uint8_t max_bit = 0;
|
|
int ret;
|
|
|
|
power = devm_kzalloc(dev, sizeof(*power), GFP_KERNEL);
|
|
if (!power)
|
|
return -ENOMEM;
|
|
|
|
power->base = devm_platform_ioremap_resource(pdev, 0);
|
|
if (IS_ERR(power->base))
|
|
return PTR_ERR(power->base);
|
|
|
|
table = of_device_get_match_data(dev);
|
|
if (!table)
|
|
return -EINVAL;
|
|
|
|
power->genpd_data.num_domains = 0;
|
|
ndom = 0;
|
|
for (entry = table; entry->name; entry++) {
|
|
max_bit = max(max_bit, entry->bit);
|
|
ndom++;
|
|
}
|
|
|
|
if (!ndom)
|
|
return -ENODEV;
|
|
|
|
power->genpd_data.num_domains = max_bit + 1;
|
|
|
|
power->dev = devm_kcalloc(dev, power->genpd_data.num_domains,
|
|
sizeof(struct bcm63xx_power_dev),
|
|
GFP_KERNEL);
|
|
if (!power->dev)
|
|
return -ENOMEM;
|
|
|
|
power->genpd = devm_kcalloc(dev, power->genpd_data.num_domains,
|
|
sizeof(struct generic_pm_domain *),
|
|
GFP_KERNEL);
|
|
if (!power->genpd)
|
|
return -ENOMEM;
|
|
|
|
power->genpd_data.domains = power->genpd;
|
|
|
|
ndom = 0;
|
|
for (entry = table; entry->name; entry++) {
|
|
struct bcm63xx_power_dev *pmd = &power->dev[ndom];
|
|
bool is_on;
|
|
|
|
pmd->power = power;
|
|
pmd->mask = BIT(entry->bit);
|
|
pmd->genpd.name = entry->name;
|
|
pmd->genpd.flags = entry->flags;
|
|
|
|
ret = bcm63xx_power_get_state(pmd, &is_on);
|
|
if (ret)
|
|
dev_warn(dev, "unable to get current state for %s\n",
|
|
pmd->genpd.name);
|
|
|
|
pmd->genpd.power_on = bcm63xx_power_on;
|
|
pmd->genpd.power_off = bcm63xx_power_off;
|
|
|
|
pm_genpd_init(&pmd->genpd, NULL, !is_on);
|
|
power->genpd[entry->bit] = &pmd->genpd;
|
|
|
|
ndom++;
|
|
}
|
|
|
|
spin_lock_init(&power->lock);
|
|
|
|
ret = of_genpd_add_provider_onecell(np, &power->genpd_data);
|
|
if (ret) {
|
|
dev_err(dev, "failed to register genpd driver: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
dev_info(dev, "registered %u power domains\n", ndom);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct bcm63xx_power_data bcm6318_power_domains[] = {
|
|
{
|
|
.name = "pcie",
|
|
.bit = BCM6318_POWER_DOMAIN_PCIE,
|
|
}, {
|
|
.name = "usb",
|
|
.bit = BCM6318_POWER_DOMAIN_USB,
|
|
}, {
|
|
.name = "ephy0",
|
|
.bit = BCM6318_POWER_DOMAIN_EPHY0,
|
|
}, {
|
|
.name = "ephy1",
|
|
.bit = BCM6318_POWER_DOMAIN_EPHY1,
|
|
}, {
|
|
.name = "ephy2",
|
|
.bit = BCM6318_POWER_DOMAIN_EPHY2,
|
|
}, {
|
|
.name = "ephy3",
|
|
.bit = BCM6318_POWER_DOMAIN_EPHY3,
|
|
}, {
|
|
.name = "ldo2p5",
|
|
.bit = BCM6318_POWER_DOMAIN_LDO2P5,
|
|
.flags = GENPD_FLAG_ALWAYS_ON,
|
|
}, {
|
|
.name = "ldo2p9",
|
|
.bit = BCM6318_POWER_DOMAIN_LDO2P9,
|
|
.flags = GENPD_FLAG_ALWAYS_ON,
|
|
}, {
|
|
.name = "sw1p0",
|
|
.bit = BCM6318_POWER_DOMAIN_SW1P0,
|
|
.flags = GENPD_FLAG_ALWAYS_ON,
|
|
}, {
|
|
.name = "pad",
|
|
.bit = BCM6318_POWER_DOMAIN_PAD,
|
|
.flags = GENPD_FLAG_ALWAYS_ON,
|
|
}, {
|
|
/* sentinel */
|
|
},
|
|
};
|
|
|
|
static const struct bcm63xx_power_data bcm6328_power_domains[] = {
|
|
{
|
|
.name = "adsl2-mips",
|
|
.bit = BCM6328_POWER_DOMAIN_ADSL2_MIPS,
|
|
}, {
|
|
.name = "adsl2-phy",
|
|
.bit = BCM6328_POWER_DOMAIN_ADSL2_PHY,
|
|
}, {
|
|
.name = "adsl2-afe",
|
|
.bit = BCM6328_POWER_DOMAIN_ADSL2_AFE,
|
|
}, {
|
|
.name = "sar",
|
|
.bit = BCM6328_POWER_DOMAIN_SAR,
|
|
}, {
|
|
.name = "pcm",
|
|
.bit = BCM6328_POWER_DOMAIN_PCM,
|
|
}, {
|
|
.name = "usbd",
|
|
.bit = BCM6328_POWER_DOMAIN_USBD,
|
|
}, {
|
|
.name = "usbh",
|
|
.bit = BCM6328_POWER_DOMAIN_USBH,
|
|
}, {
|
|
.name = "pcie",
|
|
.bit = BCM6328_POWER_DOMAIN_PCIE,
|
|
}, {
|
|
.name = "robosw",
|
|
.bit = BCM6328_POWER_DOMAIN_ROBOSW,
|
|
}, {
|
|
.name = "ephy",
|
|
.bit = BCM6328_POWER_DOMAIN_EPHY,
|
|
}, {
|
|
/* sentinel */
|
|
},
|
|
};
|
|
|
|
static const struct bcm63xx_power_data bcm6362_power_domains[] = {
|
|
{
|
|
.name = "sar",
|
|
.bit = BCM6362_POWER_DOMAIN_SAR,
|
|
}, {
|
|
.name = "ipsec",
|
|
.bit = BCM6362_POWER_DOMAIN_IPSEC,
|
|
}, {
|
|
.name = "mips",
|
|
.bit = BCM6362_POWER_DOMAIN_MIPS,
|
|
.flags = GENPD_FLAG_ALWAYS_ON,
|
|
}, {
|
|
.name = "dect",
|
|
.bit = BCM6362_POWER_DOMAIN_DECT,
|
|
}, {
|
|
.name = "usbh",
|
|
.bit = BCM6362_POWER_DOMAIN_USBH,
|
|
}, {
|
|
.name = "usbd",
|
|
.bit = BCM6362_POWER_DOMAIN_USBD,
|
|
}, {
|
|
.name = "robosw",
|
|
.bit = BCM6362_POWER_DOMAIN_ROBOSW,
|
|
}, {
|
|
.name = "pcm",
|
|
.bit = BCM6362_POWER_DOMAIN_PCM,
|
|
}, {
|
|
.name = "periph",
|
|
.bit = BCM6362_POWER_DOMAIN_PERIPH,
|
|
.flags = GENPD_FLAG_ALWAYS_ON,
|
|
}, {
|
|
.name = "adsl-phy",
|
|
.bit = BCM6362_POWER_DOMAIN_ADSL_PHY,
|
|
}, {
|
|
.name = "gmii-pads",
|
|
.bit = BCM6362_POWER_DOMAIN_GMII_PADS,
|
|
}, {
|
|
.name = "fap",
|
|
.bit = BCM6362_POWER_DOMAIN_FAP,
|
|
}, {
|
|
.name = "pcie",
|
|
.bit = BCM6362_POWER_DOMAIN_PCIE,
|
|
}, {
|
|
.name = "wlan-pads",
|
|
.bit = BCM6362_POWER_DOMAIN_WLAN_PADS,
|
|
}, {
|
|
/* sentinel */
|
|
},
|
|
};
|
|
|
|
static const struct bcm63xx_power_data bcm63268_power_domains[] = {
|
|
{
|
|
.name = "sar",
|
|
.bit = BCM63268_POWER_DOMAIN_SAR,
|
|
}, {
|
|
.name = "ipsec",
|
|
.bit = BCM63268_POWER_DOMAIN_IPSEC,
|
|
}, {
|
|
.name = "mips",
|
|
.bit = BCM63268_POWER_DOMAIN_MIPS,
|
|
.flags = GENPD_FLAG_ALWAYS_ON,
|
|
}, {
|
|
.name = "dect",
|
|
.bit = BCM63268_POWER_DOMAIN_DECT,
|
|
}, {
|
|
.name = "usbh",
|
|
.bit = BCM63268_POWER_DOMAIN_USBH,
|
|
}, {
|
|
.name = "usbd",
|
|
.bit = BCM63268_POWER_DOMAIN_USBD,
|
|
}, {
|
|
.name = "robosw",
|
|
.bit = BCM63268_POWER_DOMAIN_ROBOSW,
|
|
}, {
|
|
.name = "pcm",
|
|
.bit = BCM63268_POWER_DOMAIN_PCM,
|
|
}, {
|
|
.name = "periph",
|
|
.bit = BCM63268_POWER_DOMAIN_PERIPH,
|
|
.flags = GENPD_FLAG_ALWAYS_ON,
|
|
}, {
|
|
.name = "vdsl-phy",
|
|
.bit = BCM63268_POWER_DOMAIN_VDSL_PHY,
|
|
}, {
|
|
.name = "vdsl-mips",
|
|
.bit = BCM63268_POWER_DOMAIN_VDSL_MIPS,
|
|
}, {
|
|
.name = "fap",
|
|
.bit = BCM63268_POWER_DOMAIN_FAP,
|
|
}, {
|
|
.name = "pcie",
|
|
.bit = BCM63268_POWER_DOMAIN_PCIE,
|
|
}, {
|
|
.name = "wlan-pads",
|
|
.bit = BCM63268_POWER_DOMAIN_WLAN_PADS,
|
|
}, {
|
|
/* sentinel */
|
|
},
|
|
};
|
|
|
|
static const struct of_device_id bcm63xx_power_of_match[] = {
|
|
{
|
|
.compatible = "brcm,bcm6318-power-controller",
|
|
.data = &bcm6318_power_domains,
|
|
}, {
|
|
.compatible = "brcm,bcm6328-power-controller",
|
|
.data = &bcm6328_power_domains,
|
|
}, {
|
|
.compatible = "brcm,bcm6362-power-controller",
|
|
.data = &bcm6362_power_domains,
|
|
}, {
|
|
.compatible = "brcm,bcm63268-power-controller",
|
|
.data = &bcm63268_power_domains,
|
|
}, {
|
|
/* sentinel */
|
|
}
|
|
};
|
|
|
|
static struct platform_driver bcm63xx_power_driver = {
|
|
.driver = {
|
|
.name = "bcm63xx-power-controller",
|
|
.of_match_table = bcm63xx_power_of_match,
|
|
},
|
|
.probe = bcm63xx_power_probe,
|
|
};
|
|
builtin_platform_driver(bcm63xx_power_driver);
|