path: root/drivers/pmdomain/qcom/rpmpd.c

// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2017-2018, The Linux Foundation. All rights reserved. */

#include <linux/cleanup.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/pm_domain.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_opp.h>
#include <linux/soc/qcom/smd-rpm.h>

#include <dt-bindings/power/qcom-rpmpd.h>

#define domain_to_rpmpd(domain) container_of(domain, struct rpmpd, pd)

static struct qcom_smd_rpm *rpmpd_smd_rpm;

/* Resource types:
 * RPMPD_X is X encoded as a little-endian, lower-case, ASCII string */
#define RPMPD_SMPA 0x61706d73
#define RPMPD_LDOA 0x616f646c
#define RPMPD_SMPB 0x62706d73
#define RPMPD_LDOB 0x626f646c
#define RPMPD_RWCX 0x78637772
#define RPMPD_RWMX 0x786d7772
#define RPMPD_RWLC 0x636c7772
#define RPMPD_RWLM 0x6d6c7772
#define RPMPD_RWSC 0x63737772
#define RPMPD_RWSM 0x6d737772
#define RPMPD_RWGX 0x78677772

/* Operation Keys */
#define KEY_CORNER		0x6e726f63 /* corn */
#define KEY_ENABLE		0x6e657773 /* swen */
#define KEY_FLOOR_CORNER	0x636676   /* vfc */
#define KEY_FLOOR_LEVEL		0x6c6676   /* vfl */
#define KEY_LEVEL		0x6c766c76 /* vlvl */

#define MAX_CORNER_RPMPD_STATE	6

struct rpmpd_req {
	__le32 key;
	__le32 nbytes;
	__le32 value;
};

struct rpmpd {
	struct generic_pm_domain pd;
	struct generic_pm_domain *parent;
	struct rpmpd *peer;
	const bool active_only;
	unsigned int corner;
	bool enabled;
	const int res_type;
	const int res_id;
	unsigned int max_state;
	__le32 key;
	bool state_synced;
};

struct rpmpd_desc {
	struct rpmpd **rpmpds;
	size_t num_pds;
	unsigned int max_state;
};

static DEFINE_MUTEX(rpmpd_lock);

/* CX */
static struct rpmpd cx_rwcx0_lvl_ao;
static struct rpmpd cx_rwcx0_lvl = {
	.pd = { .name = "cx", },
	.peer = &cx_rwcx0_lvl_ao,
	.res_type = RPMPD_RWCX,
	.res_id = 0,
	.key = KEY_LEVEL,
};

static struct rpmpd cx_rwcx0_lvl_ao = {
	.pd = { .name = "cx_ao", },
	.peer = &cx_rwcx0_lvl,
	.active_only = true,
	.res_type = RPMPD_RWCX,
	.res_id = 0,
	.key = KEY_LEVEL,
};

static struct rpmpd cx_s1a_corner_ao;
static struct rpmpd cx_s1a_corner = {
	.pd = { .name = "cx", },
	.peer = &cx_s1a_corner_ao,
	.res_type = RPMPD_SMPA,
	.res_id = 1,
	.key = KEY_CORNER,
};

static struct rpmpd cx_s1a_corner_ao = {
	.pd = { .name = "cx_ao", },
	.peer = &cx_s1a_corner,
	.active_only = true,
	.res_type = RPMPD_SMPA,
	.res_id = 1,
	.key = KEY_CORNER,
};

static struct rpmpd cx_s1a_lvl_ao;
static struct rpmpd cx_s1a_lvl = {
	.pd = { .name = "cx", },
	.peer = &cx_s1a_lvl_ao,
	.res_type = RPMPD_SMPA,
	.res_id = 1,
	.key = KEY_LEVEL,
};

static struct rpmpd cx_s1a_lvl_ao = {
	.pd = { .name = "cx_ao", },
	.peer = &cx_s1a_lvl,
	.active_only = true,
	.res_type = RPMPD_SMPA,
	.res_id = 1,
	.key = KEY_LEVEL,
};

static struct rpmpd cx_s2a_corner_ao;
static struct rpmpd cx_s2a_corner = {
	.pd = { .name = "cx", },
	.peer = &cx_s2a_corner_ao,
	.res_type = RPMPD_SMPA,
	.res_id = 2,
	.key = KEY_CORNER,
};

static struct rpmpd cx_s2a_corner_ao = {
	.pd = { .name = "cx_ao", },
	.peer = &cx_s2a_corner,
	.active_only = true,
	.res_type = RPMPD_SMPA,
	.res_id = 2,
	.key = KEY_CORNER,
};

static struct rpmpd cx_s2a_lvl_ao;
static struct rpmpd cx_s2a_lvl = {
	.pd = { .name = "cx", },
	.peer = &cx_s2a_lvl_ao,
	.res_type = RPMPD_SMPA,
	.res_id = 2,
	.key = KEY_LEVEL,
};

static struct rpmpd cx_s2a_lvl_ao =<