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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2018, The Linux Foundation. All rights reserved.*/
#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mutex.h>
#include <linux/pm_domain.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm_opp.h>
#include <soc/qcom/cmd-db.h>
#include <soc/qcom/rpmh.h>
#include <dt-bindings/power/qcom-rpmpd.h>
#define domain_to_rpmhpd(domain) container_of(domain, struct rpmhpd, pd)
#define RPMH_ARC_MAX_LEVELS 16
/**
* struct rpmhpd - top level RPMh power domain resource data structure
* @dev: rpmh power domain controller device
* @pd: generic_pm_domain corrresponding to the power domain
* @peer: A peer power domain in case Active only Voting is
* supported
* @active_only: True if it represents an Active only peer
* @level: An array of level (vlvl) to corner (hlvl) mappings
* derived from cmd-db
* @level_count: Number of levels supported by the power domain. max
* being 16 (0 - 15)
* @enabled: true if the power domain is enabled
* @res_name: Resource name used for cmd-db lookup
* @addr: Resource address as looped up using resource name from
* cmd-db
*/
struct rpmhpd {
struct device *dev;
struct generic_pm_domain pd;
struct generic_pm_domain *parent;
struct rpmhpd *peer;
const bool active_only;
unsigned int corner;
unsigned int active_corner;
u32 level[RPMH_ARC_MAX_LEVELS];
size_t level_count;
bool enabled;
const char *res_name;
u32 addr;
};
struct rpmhpd_desc {
struct rpmhpd **rpmhpds;
size_t num_pds;
};
static DEFINE_MUTEX(rpmhpd_lock);
/* SDM845 RPMH powerdomains */
static struct rpmhpd sdm845_ebi = {
.pd = { .name = "ebi", },
.res_name = "ebi.lvl",
};
static struct rpmhpd sdm845_lmx = {
.pd = { .name = "lmx", },
.res_name = "lmx.lvl",
};
static struct rpmhpd sdm845_lcx = {
.pd = { .name = "lcx", },
.res_name = "lcx.lvl",
};
static struct rpmhpd sdm845_gfx = {
.pd = { .name = "gfx", },
.res_name = "gfx.lvl",
};
static struct rpmhpd sdm845_mss = {
.pd = { .name = "mss", },
.res_name = "mss.lvl",
};
static struct rpmhpd sdm845_mx_ao;
static struct rpmhpd sdm845_mx = {
.pd = { .name = "mx", },
.peer = &sdm845_mx_ao,
.res_name = "mx.lvl",
};
static struct rpmhpd sdm845_mx_ao = {
.pd = { .name = "mx_ao", },
.active_only = true,
.peer = &sdm845_mx,
.res_name = "mx.lvl",
};
static struct rpmhpd sdm845_cx_ao;
static struct rpmhpd sdm845_cx = {
.pd = { .name = "cx", },
.peer = &sdm845_cx_ao,
.parent = &sdm845_mx.pd,
.res_name = "cx.lvl",
};
static struct rpmhpd sdm845_cx_ao = {
.pd = { .name = "cx_ao", },
.active_only = true,
.peer = &sdm845_cx,
.parent = &sdm845_mx_ao.pd,
.res_name = "cx.lvl",
};
static struct rpmhpd *sdm845_rpmhpds[] = {
[SDM845_EBI] = &sdm845_ebi,
[SDM845_MX] = &sdm845_mx,
[SDM845_MX_AO] = &sdm845_mx_ao,
[SDM845_CX] = &sdm845_cx,
[SDM845_CX_AO] = &sdm845_cx_ao,
[SDM845_LMX] = &sdm845_lmx,
[SDM845_LCX] = &sdm845_lcx,
[SDM845_GFX] = &sdm845_gfx,
[SDM845_MSS] = &sdm845_mss,
};
static const struct rpmhpd_desc sdm845_desc = {
.rpmhpds = sdm845_rpmhpds,
.num_pds = ARRAY_SIZE(sdm845_rpmhpds),
};
/* SM8150 RPMH powerdomains */
static struct rpmhpd sm8150_mmcx_ao;
static struct rpmhpd sm8150_mmcx = {
.pd = { .name = "mmcx", },
.peer = &sm8150_mmcx_ao,
.res_name = "mmcx.lvl",
};
static struct rpmhpd sm8150_mmcx_ao = {
.pd = { .name = "mmcx_ao", },
.active_only = true,
.peer = &sm8150_mmcx,
.res_name = "mmcx.lvl",
};
static struct rpmhpd *sm8150_rpmhpds[] = {
[SM8150_MSS] = &sdm845_mss,
[SM8150_EBI] = &sdm845_ebi,
[SM8150_LMX] = &sdm845_lmx,
[SM8150_LCX] = &sdm845_lcx,
[SM8150_GFX] = &sdm845_gfx,
[SM8150_MX] = &sdm845_mx,
[SM8150_MX_AO] = &sdm845_mx_ao,
[SM8150_CX] = &sdm845_cx,
[SM8150_CX_AO] = &sdm845_cx_ao,
[SM8150_MMCX] = &sm8150_mmcx,
[SM8150_MMCX_AO] = &sm8150_mmcx_ao,
};
static const struct rpmhpd_desc sm8150_desc = {
.rpmhpds = sm8150_rpmhpds,
.num_pds = ARRAY_SIZE(sm8150_rpmhpds),
};
/* SC7180 RPMH powerdomains */
static struct rpmhpd *sc7180_rpmhpds[] = {
[SC7180_CX] = &sdm845_cx,
[SC7180_CX_AO] = &sdm845_cx_ao,
[SC7180_GFX] = &sdm845_gfx,
[SC7180_MX] = &sdm845_mx,
[SC7180_MX_AO] = &sdm845_mx_ao,
[SC7180_LMX] = &sdm845_lmx,
[SC7180_LCX] = &sdm845_lcx,
[SC7180_MSS] = &sdm845_mss,
};
static const struct rpmhpd_desc sc7180_desc = {
.rpmhpds = sc7180_rpmhpds,
.num_pds = ARRAY_SIZE(sc7180_rpmhpds),
};
static const struct of_device_id rpmhpd_match_table[] = {
{ .compatible = "qcom,sc7180-rpmhpd", .data = &sc7180_desc },
{ .compatible = "qcom,sdm845-rpmhpd", .data = &sdm845_desc },
{ .compatible = "qcom,sm8150-rpmhpd", .data = &sm8150_desc },
{ }
};
static int rpmhpd_send_corner(struct rpmhpd *pd, int state,
unsigned int corner, bool sync)
{
struct tcs_cmd cmd = {
.addr = pd->addr,
.data = corner,
};
/*
* Wait for an ack only when we are increasing the
* perf state of the power domain
*/
if (sync)
return rpmh_write(pd->dev, state, &cmd, 1);
else
return rpmh_write_async(pd->dev, state, &cmd, 1);
}
static void to_active_sleep(struct rpmhpd *pd, unsigned int corner,
unsigned int *active, unsigned int *sleep)
{
*active = corner;
if (pd->active_only)
*sleep = 0;
else
*sleep = *active;
}
/*
* This function is used to aggregate the votes across the active only
* resources and its peers. The aggregated votes are sent to RPMh as
* ACTIVE_ONLY votes (which take effect immediately), as WAKE_ONLY votes
* (applied by RPMh on system wakeup) and as SLEEP votes (applied by RPMh
* on system sleep).
* We send ACTIVE_ONLY votes for resources without any peers. For others,
* which have an active only peer, all 3 votes are sent.
*/
static int rpmhpd_aggregate_corner(struct rpmhpd *pd, unsigned int corner)
{
int ret;
struct rpmhpd *peer = pd->peer;
unsigned int active_corner, sleep_corner;
unsigned int this_active_corner = 0, this_sleep_corner = 0;
unsigned int peer_active_corner = 0, peer_sleep_corner = 0;
to_active_sleep(pd, corner, &this_active_corner, &this_sl
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