[J-u-boot.git] / drivers / power / domain / imx8-power-domain-legacy.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright 2017 NXP
 */

#include <common.h>
#include <dm.h>
#include <malloc.h>
#include <power-domain-uclass.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_platdata *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_platdata *)dev_get_platdata(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_platdata *pdata;
	sc_err_t ret;

	ppriv = dev_get_priv(dev);
	pdata = dev_get_platdata(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_platdata *pdata;
	sc_err_t ret;
	struct power_domain parent_pd;

	if (device_get_uclass_id(parent) == UCLASS_POWER_DOMAIN) {
		pdata =
		(struct imx8_power_domain_platdata *)dev_get_platdata(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_ofdata_to_platdata(struct udevice *dev)
{
	int reg;
	struct imx8_power_domain_platdata *pdata = dev_get_platdata(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,
	.ofdata_to_platdata = imx8_power_domain_ofdata_to_platdata,
	.platdata_auto_alloc_size = sizeof(struct imx8_power_domain_platdata),
	.priv_auto_alloc_size = sizeof(struct imx8_power_domain_priv),
	.ops = &imx8_power_domain_ops,
	.flags	= DM_FLAG_DEFAULT_PD_CTRL_OFF,
};
Commit	Line	Data
d526f340 PF	1	// SPDX-License-Identifier: GPL-2.0
	2	/*
	3	* Copyright 2017 NXP
	4	*/
	5
	6	#include <common.h>
	7	#include <dm.h>
336d4615	8	#include <malloc.h>
d526f340 PF	9	#include <power-domain-uclass.h>
	10	#include <asm/io.h>
	11	#include <asm/arch/power-domain.h>
	12	#include <dm/device-internal.h>
	13	#include <dm/device.h>
231401de	14	#include <dm/uclass-internal.h>
d526f340 PF	15	#include <asm/arch/sci/sci.h>
	16
	17	DECLARE_GLOBAL_DATA_PTR;
	18
	19	struct imx8_power_domain_priv {
	20	bool state_on;
	21	};
	22
231401de PF	23	static bool check_device_power_off(struct udevice *dev,
	24	const char *permanent_on_devices[],
	25	int size)
	26	{
	27	int i;
	28
	29	for (i = 0; i < size; i++) {
	30	if (!strcmp(dev->name, permanent_on_devices[i]))
	31	return false;
	32	}
	33
	34	return true;
	35	}
	36
	37	void imx8_power_off_pd_devices(const char *permanent_on_devices[], int size)
	38	{
	39	struct udevice *dev;
	40	struct power_domain pd;
	41
	42	for (uclass_find_first_device(UCLASS_POWER_DOMAIN, &dev); dev;
	43	uclass_find_next_device(&dev)) {
	44	if (!device_active(dev))
	45	continue;
	46	/*
	47	* Power off active pd devices except the permanent
	48	* power on devices
	49	*/
	50	if (check_device_power_off(dev, permanent_on_devices, size)) {
	51	pd.dev = dev;
	52	power_domain_off(&pd);
	53	}
	54	}
	55	}
	56
8c0a1c6d PF	57	int imx8_power_domain_lookup_name(const char *name,
	58	struct power_domain *power_domain)
	59	{
	60	struct udevice *dev;
	61	struct power_domain_ops *ops;
	62	int ret;
	63
	64	debug("%s(power_domain=%p name=%s)\n", __func__, power_domain, name);
	65
	66	ret = uclass_get_device_by_name(UCLASS_POWER_DOMAIN, name, &dev);
	67	if (ret) {
	68	printf("%s fail: %s, ret = %d\n", __func__, name, ret);
	69	return ret;
	70	}
	71
	72	ops = (struct power_domain_ops *)dev->driver->ops;
	73	power_domain->dev = dev;
	74	ret = ops->request(power_domain);
	75	if (ret) {
	76	debug("ops->request() failed: %d\n", ret);
	77	return ret;
	78	}
	79
	80	debug("%s ok: %s\n", __func__, dev->name);
	81
	82	return 0;
	83	}
	84
d526f340 PF	85	static int imx8_power_domain_request(struct power_domain *power_domain)
	86	{
	87	debug("%s(power_domain=%p)\n", __func__, power_domain);
	88
	89	return 0;
	90	}
	91
	92	static int imx8_power_domain_free(struct power_domain *power_domain)
	93	{
	94	debug("%s(power_domain=%p)\n", __func__, power_domain);
	95
	96	return 0;
	97	}
	98
	99	static int imx8_power_domain_on(struct power_domain *power_domain)
	100	{
	101	struct udevice *dev = power_domain->dev;
	102	struct imx8_power_domain_platdata *pdata;
	103	struct imx8_power_domain_priv *ppriv;
	104	sc_err_t ret;
	105	int err;
	106
	107	struct power_domain parent_domain;
	108	struct udevice *parent = dev_get_parent(dev);
	109
	110	/* Need to power on parent node first */
	111	if (device_get_uclass_id(parent) == UCLASS_POWER_DOMAIN) {
	112	parent_domain.dev = parent;
	113	err = imx8_power_domain_on(&parent_domain);
	114	if (err)
	115	return err;
	116	}
	117
	118	pdata = (struct imx8_power_domain_platdata *)dev_get_platdata(dev);
	119	ppriv = (struct imx8_power_domain_priv *)dev_get_priv(dev);
	120
	121	debug("%s(power_domain=%s) resource_id %d\n", __func__, dev->name,
	122	pdata->resource_id);
	123
	124	/* Already powered on */
	125	if (ppriv->state_on)
	126	return 0;
	127
6fcb2ee7	128	if (pdata->resource_id != SC_R_NONE) {
1074af51 YL	129	if (!sc_rm_is_resource_owned(-1, pdata->resource_id))
	130	printf("%s [%d] not owned by curr partition\n", dev->name, pdata->resource_id);
	131
d526f340 PF	132	ret = sc_pm_set_resource_power_mode(-1, pdata->resource_id,
	133	SC_PM_PW_MODE_ON);
	134	if (ret) {
	135	printf("Error: %s Power up failed! (error = %d)\n",
	136	dev->name, ret);
	137	return -EIO;
	138	}
	139	}
	140
	141	ppriv->state_on = true;
	142	debug("%s is powered on\n", dev->name);
	143
	144	return 0;
	145	}
	146
	147	static int imx8_power_domain_off_node(struct power_domain *power_domain)
	148	{
	149	struct udevice *dev = power_domain->dev;
	150	struct udevice *child;
	151	struct imx8_power_domain_priv *ppriv;
	152	struct imx8_power_domain_priv *child_ppriv;
	153	struct imx8_power_domain_platdata *pdata;
	154	sc_err_t ret;
	155
	156	ppriv = dev_get_priv(dev);
	157	pdata = dev_get_platdata(dev);
	158
	159	debug("%s, %s, state_on %d\n", __func__, dev->name, ppriv->state_on);
	160
	161	/* Already powered off */
	162	if (!ppriv->state_on)
	163	return 0;
	164
	165	/* Check if all subnodes are off */
	166	for (device_find_first_child(dev, &child);
	167	child;
	168	device_find_next_child(&child)) {
	169	if (device_active(child)) {
	170	child_ppriv =
	171	(struct imx8_power_domain_priv *)dev_get_priv(child);
	172	if (child_ppriv->state_on)
	173	return -EPERM;
	174	}
	175	}
	176
6fcb2ee7	177	if (pdata->resource_id != SC_R_NONE) {
d526f340 PF	178	ret = sc_pm_set_resource_power_mode(-1, pdata->resource_id,
	179	SC_PM_PW_MODE_OFF);
	180	if (ret) {
e8f8b5cc PF	181	if (!sc_rm_is_resource_owned(-1, pdata->resource_id)) {
	182	printf("%s not owned by curr partition %d\n", dev->name, pdata->resource_id);
	183	return 0;
	184	}
d526f340 PF	185	printf("Error: %s Power off failed! (error = %d)\n",
	186	dev->name, ret);
	187	return -EIO;
	188	}
	189	}
	190
	191	ppriv->state_on = false;
	192	debug("%s is powered off\n", dev->name);
	193
	194	return 0;
	195	}
	196
	197	static int imx8_power_domain_off_parentnodes(struct power_domain *power_domain)
	198	{
	199	struct udevice *dev = power_domain->dev;
	200	struct udevice *parent = dev_get_parent(dev);
	201	struct udevice *child;
	202	struct imx8_power_domain_priv *ppriv;
	203	struct imx8_power_domain_priv *child_ppriv;
	204	struct imx8_power_domain_platdata *pdata;
	205	sc_err_t ret;
	206	struct power_domain parent_pd;
	207
	208	if (device_get_uclass_id(parent) == UCLASS_POWER_DOMAIN) {
	209	pdata =
	210	(struct imx8_power_domain_platdata *)dev_get_platdata(parent);
	211	ppriv = (struct imx8_power_domain_priv *)dev_get_priv(parent);
	212
	213	debug("%s, %s, state_on %d\n", __func__, parent->name,
	214	ppriv->state_on);
	215
	216	/* Already powered off */
	217	if (!ppriv->state_on)
	218	return 0;
	219
	220	/*
	221	* Check if all sibling nodes are off. If yes,
	222	* power off parent
	223	*/
	224	for (device_find_first_child(parent, &child); child;
	225	device_find_next_child(&child)) {
	226	if (device_active(child)) {
	227	child_ppriv = (struct imx8_power_domain_priv *)
	228	dev_get_priv(child);
	229	/* Find a power on sibling */
	230	if (child_ppriv->state_on) {
	231	debug("sibling %s, state_on %d\n",
	232	child->name,
	233	child_ppriv->state_on);
	234	return 0;
	235	}
	236	}
	237	}
	238
	239	/* power off parent */
6fcb2ee7	240	if (pdata->resource_id != SC_R_NONE) {
d526f340 PF	241	ret = sc_pm_set_resource_power_mode(-1,
	242	pdata->resource_id,
	243	SC_PM_PW_MODE_OFF);
	244	if (ret) {
	245	printf("%s Power off failed! (error = %d)\n",
	246	parent->name, ret);
	247	return -EIO;
	248	}
	249	}
	250
	251	ppriv->state_on = false;
	252	debug("%s is powered off\n", parent->name);
	253
	254	parent_pd.dev = parent;
	255	imx8_power_domain_off_parentnodes(&parent_pd);
	256	}
	257
	258	return 0;
	259	}
	260
	261	static int imx8_power_domain_off(struct power_domain *power_domain)
	262	{
	263	int ret;
	264
	265	debug("%s(power_domain=%p)\n", __func__, power_domain);
	266
	267	/* Turn off the node */
	268	ret = imx8_power_domain_off_node(power_domain);
	269	if (ret) {
	270	debug("Can't power off the node of dev %s, ret = %d\n",
	271	power_domain->dev->name, ret);
	272	return ret;
	273	}
	274
	275	/* Turn off parent nodes, if sibling nodes are all off */
	276	ret = imx8_power_domain_off_parentnodes(power_domain);
	277	if (ret) {
	278	printf("Failed to power off parent nodes of dev %s, ret = %d\n",
	279	power_domain->dev->name, ret);
	280	return ret;
	281	}
	282
	283	return 0;
	284	}
	285
	286	static int imx8_power_domain_of_xlate(struct power_domain *power_domain,
	287	struct ofnode_phandle_args *args)
	288	{
	289	debug("%s(power_domain=%p)\n", __func__, power_domain);
	290
	291	/* Do nothing to the xlate, since we don't have args used */
	292
	293	return 0;
	294	}
	295
	296	static int imx8_power_domain_bind(struct udevice *dev)
	297	{
	298	int offset;
	299	const char *name;
	300	int ret = 0;
	301
	302	debug("%s(dev=%p)\n", __func__, dev);
	303
	304	offset = dev_of_offset(dev);
305	for (offset = fdt_first_subnode(gd->fdt_blob, offset); offset > 0;
306	offset = fdt_next_subnode(gd->fdt_blob, offset)) {
307	/* Bind the subnode to this driver */
308	name = fdt_get_name(gd->fdt_blob, offset, NULL);
309
310	ret = device_bind_with_driver_data(dev, dev->driver, name,
311	dev->driver_data,
312	offset_to_ofnode(offset),
313	NULL);
314
315	if (ret == -ENODEV)
316	printf("Driver '%s' refuses to bind\n",
317	dev->driver->name);
318
319	if (ret)
320	printf("Error binding driver '%s': %d\n",
321	dev->driver->name, ret);
322	}
323
324	return 0;
325	}
326
327	static int imx8_power_domain_probe(struct udevice *dev)
328	{
329	struct imx8_power_domain_priv *ppriv;
330
331	debug("%s(dev=%s)\n", __func__, dev->name);
332
333	ppriv = (struct imx8_power_domain_priv *)dev_get_priv(dev);
334
335	/* Set default to power off */
336	if (ppriv)
337	ppriv->state_on = false;
338
339	return 0;
340	}
341
342	static int imx8_power_domain_ofdata_to_platdata(struct udevice *dev)
343	{
344	int reg;
345	struct imx8_power_domain_platdata *pdata = dev_get_platdata(dev);
346
347	reg = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev), "reg", -1);
348	if (reg == -1) {
349	debug("%s: Invalid resource id %d\n", __func__, reg);
350	return -EINVAL;
351	}
352	pdata->resource_id = (sc_rsrc_t)reg;
353
354	debug("%s resource_id %d\n", __func__, pdata->resource_id);
355
356	return 0;
357	}
358
359	static const struct udevice_id imx8_power_domain_ids[] = {
360	{ .compatible = "nxp,imx8-pd" },
361	{ }
362	};
363
364	struct power_domain_ops imx8_power_domain_ops = {
365	.request = imx8_power_domain_request,
4f51188e	366	.rfree = imx8_power_domain_free,
d526f340 PF	367	.on = imx8_power_domain_on,
	368	.off = imx8_power_domain_off,
	369	.of_xlate = imx8_power_domain_of_xlate,
	370	};
	371
	372	U_BOOT_DRIVER(imx8_power_domain) = {
	373	.name = "imx8_power_domain",
	374	.id = UCLASS_POWER_DOMAIN,
	375	.of_match = imx8_power_domain_ids,
	376	.bind = imx8_power_domain_bind,
	377	.probe = imx8_power_domain_probe,
	378	.ofdata_to_platdata = imx8_power_domain_ofdata_to_platdata,
	379	.platdata_auto_alloc_size = sizeof(struct imx8_power_domain_platdata),
	380	.priv_auto_alloc_size = sizeof(struct imx8_power_domain_priv),
	381	.ops = &imx8_power_domain_ops,
ca0c5271	382	.flags = DM_FLAG_DEFAULT_PD_CTRL_OFF,
d526f340	383	};