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author | 2023-10-10 14:33:42 +0000 | |
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committer | 2023-10-10 14:33:42 +0000 | |
commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/u-boot/drivers/power/domain/imx8-power-domain-legacy.c | |
parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/u-boot/drivers/power/domain/imx8-power-domain-legacy.c')
-rw-r--r-- | roms/u-boot/drivers/power/domain/imx8-power-domain-legacy.c | 385 |
1 files changed, 385 insertions, 0 deletions
diff --git a/roms/u-boot/drivers/power/domain/imx8-power-domain-legacy.c b/roms/u-boot/drivers/power/domain/imx8-power-domain-legacy.c new file mode 100644 index 000000000..e2fae2dbc --- /dev/null +++ b/roms/u-boot/drivers/power/domain/imx8-power-domain-legacy.c @@ -0,0 +1,385 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2017 NXP + */ + +#include <common.h> +#include <dm.h> +#include <log.h> +#include <malloc.h> +#include <power-domain-uclass.h> +#include <asm/global_data.h> +#include <asm/io.h> +#include <asm/arch/power-domain.h> +#include <dm/device-internal.h> +#include <dm/device.h> +#include <dm/uclass-internal.h> +#include <asm/arch/sci/sci.h> + +DECLARE_GLOBAL_DATA_PTR; + +struct imx8_power_domain_priv { + bool state_on; +}; + +static bool check_device_power_off(struct udevice *dev, + const char *permanent_on_devices[], + int size) +{ + int i; + + for (i = 0; i < size; i++) { + if (!strcmp(dev->name, permanent_on_devices[i])) + return false; + } + + return true; +} + +void imx8_power_off_pd_devices(const char *permanent_on_devices[], int size) +{ + struct udevice *dev; + struct power_domain pd; + + for (uclass_find_first_device(UCLASS_POWER_DOMAIN, &dev); dev; + uclass_find_next_device(&dev)) { + if (!device_active(dev)) + continue; + /* + * Power off active pd devices except the permanent + * power on devices + */ + if (check_device_power_off(dev, permanent_on_devices, size)) { + pd.dev = dev; + power_domain_off(&pd); + } + } +} + +int imx8_power_domain_lookup_name(const char *name, + struct power_domain *power_domain) +{ + struct udevice *dev; + struct power_domain_ops *ops; + int ret; + + debug("%s(power_domain=%p name=%s)\n", __func__, power_domain, name); + + ret = uclass_get_device_by_name(UCLASS_POWER_DOMAIN, name, &dev); + if (ret) { + printf("%s fail: %s, ret = %d\n", __func__, name, ret); + return ret; + } + + ops = (struct power_domain_ops *)dev->driver->ops; + power_domain->dev = dev; + ret = ops->request(power_domain); + if (ret) { + debug("ops->request() failed: %d\n", ret); + return ret; + } + + debug("%s ok: %s\n", __func__, dev->name); + + return 0; +} + +static int imx8_power_domain_request(struct power_domain *power_domain) +{ + debug("%s(power_domain=%p)\n", __func__, power_domain); + + return 0; +} + +static int imx8_power_domain_free(struct power_domain *power_domain) +{ + debug("%s(power_domain=%p)\n", __func__, power_domain); + + return 0; +} + +static int imx8_power_domain_on(struct power_domain *power_domain) +{ + struct udevice *dev = power_domain->dev; + struct imx8_power_domain_plat *pdata; + struct imx8_power_domain_priv *ppriv; + sc_err_t ret; + int err; + + struct power_domain parent_domain; + struct udevice *parent = dev_get_parent(dev); + + /* Need to power on parent node first */ + if (device_get_uclass_id(parent) == UCLASS_POWER_DOMAIN) { + parent_domain.dev = parent; + err = imx8_power_domain_on(&parent_domain); + if (err) + return err; + } + + pdata = (struct imx8_power_domain_plat *)dev_get_plat(dev); + ppriv = (struct imx8_power_domain_priv *)dev_get_priv(dev); + + debug("%s(power_domain=%s) resource_id %d\n", __func__, dev->name, + pdata->resource_id); + + /* Already powered on */ + if (ppriv->state_on) + return 0; + + if (pdata->resource_id != SC_R_NONE) { + if (!sc_rm_is_resource_owned(-1, pdata->resource_id)) + printf("%s [%d] not owned by curr partition\n", dev->name, pdata->resource_id); + + ret = sc_pm_set_resource_power_mode(-1, pdata->resource_id, + SC_PM_PW_MODE_ON); + if (ret) { + printf("Error: %s Power up failed! (error = %d)\n", + dev->name, ret); + return -EIO; + } + } + + ppriv->state_on = true; + debug("%s is powered on\n", dev->name); + + return 0; +} + +static int imx8_power_domain_off_node(struct power_domain *power_domain) +{ + struct udevice *dev = power_domain->dev; + struct udevice *child; + struct imx8_power_domain_priv *ppriv; + struct imx8_power_domain_priv *child_ppriv; + struct imx8_power_domain_plat *pdata; + sc_err_t ret; + + ppriv = dev_get_priv(dev); + pdata = dev_get_plat(dev); + + debug("%s, %s, state_on %d\n", __func__, dev->name, ppriv->state_on); + + /* Already powered off */ + if (!ppriv->state_on) + return 0; + + /* Check if all subnodes are off */ + for (device_find_first_child(dev, &child); + child; + device_find_next_child(&child)) { + if (device_active(child)) { + child_ppriv = + (struct imx8_power_domain_priv *)dev_get_priv(child); + if (child_ppriv->state_on) + return -EPERM; + } + } + + if (pdata->resource_id != SC_R_NONE) { + ret = sc_pm_set_resource_power_mode(-1, pdata->resource_id, + SC_PM_PW_MODE_OFF); + if (ret) { + if (!sc_rm_is_resource_owned(-1, pdata->resource_id)) { + printf("%s not owned by curr partition %d\n", dev->name, pdata->resource_id); + return 0; + } + printf("Error: %s Power off failed! (error = %d)\n", + dev->name, ret); + return -EIO; + } + } + + ppriv->state_on = false; + debug("%s is powered off\n", dev->name); + + return 0; +} + +static int imx8_power_domain_off_parentnodes(struct power_domain *power_domain) +{ + struct udevice *dev = power_domain->dev; + struct udevice *parent = dev_get_parent(dev); + struct udevice *child; + struct imx8_power_domain_priv *ppriv; + struct imx8_power_domain_priv *child_ppriv; + struct imx8_power_domain_plat *pdata; + sc_err_t ret; + struct power_domain parent_pd; + + if (device_get_uclass_id(parent) == UCLASS_POWER_DOMAIN) { + pdata = + (struct imx8_power_domain_plat *)dev_get_plat(parent); + ppriv = (struct imx8_power_domain_priv *)dev_get_priv(parent); + + debug("%s, %s, state_on %d\n", __func__, parent->name, + ppriv->state_on); + + /* Already powered off */ + if (!ppriv->state_on) + return 0; + + /* + * Check if all sibling nodes are off. If yes, + * power off parent + */ + for (device_find_first_child(parent, &child); child; + device_find_next_child(&child)) { + if (device_active(child)) { + child_ppriv = (struct imx8_power_domain_priv *) + dev_get_priv(child); + /* Find a power on sibling */ + if (child_ppriv->state_on) { + debug("sibling %s, state_on %d\n", + child->name, + child_ppriv->state_on); + return 0; + } + } + } + + /* power off parent */ + if (pdata->resource_id != SC_R_NONE) { + ret = sc_pm_set_resource_power_mode(-1, + pdata->resource_id, + SC_PM_PW_MODE_OFF); + if (ret) { + printf("%s Power off failed! (error = %d)\n", + parent->name, ret); + return -EIO; + } + } + + ppriv->state_on = false; + debug("%s is powered off\n", parent->name); + + parent_pd.dev = parent; + imx8_power_domain_off_parentnodes(&parent_pd); + } + + return 0; +} + +static int imx8_power_domain_off(struct power_domain *power_domain) +{ + int ret; + + debug("%s(power_domain=%p)\n", __func__, power_domain); + + /* Turn off the node */ + ret = imx8_power_domain_off_node(power_domain); + if (ret) { + debug("Can't power off the node of dev %s, ret = %d\n", + power_domain->dev->name, ret); + return ret; + } + + /* Turn off parent nodes, if sibling nodes are all off */ + ret = imx8_power_domain_off_parentnodes(power_domain); + if (ret) { + printf("Failed to power off parent nodes of dev %s, ret = %d\n", + power_domain->dev->name, ret); + return ret; + } + + return 0; +} + +static int imx8_power_domain_of_xlate(struct power_domain *power_domain, + struct ofnode_phandle_args *args) +{ + debug("%s(power_domain=%p)\n", __func__, power_domain); + + /* Do nothing to the xlate, since we don't have args used */ + + return 0; +} + +static int imx8_power_domain_bind(struct udevice *dev) +{ + int offset; + const char *name; + int ret = 0; + + debug("%s(dev=%p)\n", __func__, dev); + + offset = dev_of_offset(dev); + for (offset = fdt_first_subnode(gd->fdt_blob, offset); offset > 0; + offset = fdt_next_subnode(gd->fdt_blob, offset)) { + /* Bind the subnode to this driver */ + name = fdt_get_name(gd->fdt_blob, offset, NULL); + + ret = device_bind_with_driver_data(dev, dev->driver, name, + dev->driver_data, + offset_to_ofnode(offset), + NULL); + + if (ret == -ENODEV) + printf("Driver '%s' refuses to bind\n", + dev->driver->name); + + if (ret) + printf("Error binding driver '%s': %d\n", + dev->driver->name, ret); + } + + return 0; +} + +static int imx8_power_domain_probe(struct udevice *dev) +{ + struct imx8_power_domain_priv *ppriv; + + debug("%s(dev=%s)\n", __func__, dev->name); + + ppriv = (struct imx8_power_domain_priv *)dev_get_priv(dev); + + /* Set default to power off */ + if (ppriv) + ppriv->state_on = false; + + return 0; +} + +static int imx8_power_domain_of_to_plat(struct udevice *dev) +{ + int reg; + struct imx8_power_domain_plat *pdata = dev_get_plat(dev); + + reg = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev), "reg", -1); + if (reg == -1) { + debug("%s: Invalid resource id %d\n", __func__, reg); + return -EINVAL; + } + pdata->resource_id = (sc_rsrc_t)reg; + + debug("%s resource_id %d\n", __func__, pdata->resource_id); + + return 0; +} + +static const struct udevice_id imx8_power_domain_ids[] = { + { .compatible = "nxp,imx8-pd" }, + { } +}; + +struct power_domain_ops imx8_power_domain_ops = { + .request = imx8_power_domain_request, + .rfree = imx8_power_domain_free, + .on = imx8_power_domain_on, + .off = imx8_power_domain_off, + .of_xlate = imx8_power_domain_of_xlate, +}; + +U_BOOT_DRIVER(imx8_power_domain) = { + .name = "imx8_power_domain", + .id = UCLASS_POWER_DOMAIN, + .of_match = imx8_power_domain_ids, + .bind = imx8_power_domain_bind, + .probe = imx8_power_domain_probe, + .of_to_plat = imx8_power_domain_of_to_plat, + .plat_auto = sizeof(struct imx8_power_domain_plat), + .priv_auto = sizeof(struct imx8_power_domain_priv), + .ops = &imx8_power_domain_ops, + .flags = DM_FLAG_DEFAULT_PD_CTRL_OFF, +}; |