425 lines
11 KiB
C
425 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2017-2018, The Linux Foundation. All rights reserved. */
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/mutex.h>
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#include <linux/pm_domain.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/platform_device.h>
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#include <linux/pm_opp.h>
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#include <linux/soc/qcom/smd-rpm.h>
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#include <dt-bindings/power/qcom-rpmpd.h>
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#define domain_to_rpmpd(domain) container_of(domain, struct rpmpd, pd)
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/* Resource types:
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* RPMPD_X is X encoded as a little-endian, lower-case, ASCII string */
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#define RPMPD_SMPA 0x61706d73
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#define RPMPD_LDOA 0x616f646c
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#define RPMPD_RWCX 0x78637772
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#define RPMPD_RWMX 0x786d7772
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#define RPMPD_RWLC 0x636c7772
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#define RPMPD_RWLM 0x6d6c7772
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#define RPMPD_RWSC 0x63737772
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#define RPMPD_RWSM 0x6d737772
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/* Operation Keys */
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#define KEY_CORNER 0x6e726f63 /* corn */
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#define KEY_ENABLE 0x6e657773 /* swen */
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#define KEY_FLOOR_CORNER 0x636676 /* vfc */
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#define KEY_FLOOR_LEVEL 0x6c6676 /* vfl */
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#define KEY_LEVEL 0x6c766c76 /* vlvl */
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#define MAX_8996_RPMPD_STATE 6
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#define DEFINE_RPMPD_PAIR(_platform, _name, _active, r_type, r_key, \
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r_id) \
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static struct rpmpd _platform##_##_active; \
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static struct rpmpd _platform##_##_name = { \
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.pd = { .name = #_name, }, \
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.peer = &_platform##_##_active, \
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.res_type = RPMPD_##r_type, \
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.res_id = r_id, \
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.key = KEY_##r_key, \
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}; \
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static struct rpmpd _platform##_##_active = { \
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.pd = { .name = #_active, }, \
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.peer = &_platform##_##_name, \
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.active_only = true, \
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.res_type = RPMPD_##r_type, \
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.res_id = r_id, \
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.key = KEY_##r_key, \
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}
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#define DEFINE_RPMPD_CORNER(_platform, _name, r_type, r_id) \
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static struct rpmpd _platform##_##_name = { \
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.pd = { .name = #_name, }, \
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.res_type = RPMPD_##r_type, \
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.res_id = r_id, \
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.key = KEY_CORNER, \
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}
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#define DEFINE_RPMPD_LEVEL(_platform, _name, r_type, r_id) \
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static struct rpmpd _platform##_##_name = { \
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.pd = { .name = #_name, }, \
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.res_type = RPMPD_##r_type, \
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.res_id = r_id, \
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.key = KEY_LEVEL, \
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}
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#define DEFINE_RPMPD_VFC(_platform, _name, r_type, r_id) \
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static struct rpmpd _platform##_##_name = { \
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.pd = { .name = #_name, }, \
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.res_type = RPMPD_##r_type, \
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.res_id = r_id, \
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.key = KEY_FLOOR_CORNER, \
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}
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#define DEFINE_RPMPD_VFL(_platform, _name, r_type, r_id) \
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static struct rpmpd _platform##_##_name = { \
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.pd = { .name = #_name, }, \
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.res_type = RPMPD_##r_type, \
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.res_id = r_id, \
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.key = KEY_FLOOR_LEVEL, \
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}
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struct rpmpd_req {
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__le32 key;
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__le32 nbytes;
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__le32 value;
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};
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struct rpmpd {
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struct generic_pm_domain pd;
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struct rpmpd *peer;
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const bool active_only;
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unsigned int corner;
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bool enabled;
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const char *res_name;
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const int res_type;
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const int res_id;
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struct qcom_smd_rpm *rpm;
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unsigned int max_state;
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__le32 key;
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};
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struct rpmpd_desc {
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struct rpmpd **rpmpds;
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size_t num_pds;
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unsigned int max_state;
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};
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static DEFINE_MUTEX(rpmpd_lock);
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/* msm8976 RPM Power Domains */
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DEFINE_RPMPD_PAIR(msm8976, vddcx, vddcx_ao, SMPA, LEVEL, 2);
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DEFINE_RPMPD_PAIR(msm8976, vddmx, vddmx_ao, SMPA, LEVEL, 6);
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DEFINE_RPMPD_VFL(msm8976, vddcx_vfl, RWSC, 2);
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DEFINE_RPMPD_VFL(msm8976, vddmx_vfl, RWSM, 6);
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static struct rpmpd *msm8976_rpmpds[] = {
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[MSM8976_VDDCX] = &msm8976_vddcx,
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[MSM8976_VDDCX_AO] = &msm8976_vddcx_ao,
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[MSM8976_VDDCX_VFL] = &msm8976_vddcx_vfl,
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[MSM8976_VDDMX] = &msm8976_vddmx,
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[MSM8976_VDDMX_AO] = &msm8976_vddmx_ao,
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[MSM8976_VDDMX_VFL] = &msm8976_vddmx_vfl,
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};
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static const struct rpmpd_desc msm8976_desc = {
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.rpmpds = msm8976_rpmpds,
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.num_pds = ARRAY_SIZE(msm8976_rpmpds),
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.max_state = RPM_SMD_LEVEL_TURBO_HIGH,
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};
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/* msm8996 RPM Power domains */
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DEFINE_RPMPD_PAIR(msm8996, vddcx, vddcx_ao, SMPA, CORNER, 1);
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DEFINE_RPMPD_PAIR(msm8996, vddmx, vddmx_ao, SMPA, CORNER, 2);
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DEFINE_RPMPD_CORNER(msm8996, vddsscx, LDOA, 26);
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DEFINE_RPMPD_VFC(msm8996, vddcx_vfc, SMPA, 1);
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DEFINE_RPMPD_VFC(msm8996, vddsscx_vfc, LDOA, 26);
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static struct rpmpd *msm8996_rpmpds[] = {
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[MSM8996_VDDCX] = &msm8996_vddcx,
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[MSM8996_VDDCX_AO] = &msm8996_vddcx_ao,
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[MSM8996_VDDCX_VFC] = &msm8996_vddcx_vfc,
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[MSM8996_VDDMX] = &msm8996_vddmx,
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[MSM8996_VDDMX_AO] = &msm8996_vddmx_ao,
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[MSM8996_VDDSSCX] = &msm8996_vddsscx,
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[MSM8996_VDDSSCX_VFC] = &msm8996_vddsscx_vfc,
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};
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static const struct rpmpd_desc msm8996_desc = {
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.rpmpds = msm8996_rpmpds,
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.num_pds = ARRAY_SIZE(msm8996_rpmpds),
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.max_state = MAX_8996_RPMPD_STATE,
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};
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/* msm8998 RPM Power domains */
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DEFINE_RPMPD_PAIR(msm8998, vddcx, vddcx_ao, RWCX, LEVEL, 0);
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DEFINE_RPMPD_VFL(msm8998, vddcx_vfl, RWCX, 0);
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DEFINE_RPMPD_PAIR(msm8998, vddmx, vddmx_ao, RWMX, LEVEL, 0);
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DEFINE_RPMPD_VFL(msm8998, vddmx_vfl, RWMX, 0);
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DEFINE_RPMPD_LEVEL(msm8998, vdd_ssccx, RWSC, 0);
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DEFINE_RPMPD_VFL(msm8998, vdd_ssccx_vfl, RWSC, 0);
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DEFINE_RPMPD_LEVEL(msm8998, vdd_sscmx, RWSM, 0);
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DEFINE_RPMPD_VFL(msm8998, vdd_sscmx_vfl, RWSM, 0);
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static struct rpmpd *msm8998_rpmpds[] = {
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[MSM8998_VDDCX] = &msm8998_vddcx,
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[MSM8998_VDDCX_AO] = &msm8998_vddcx_ao,
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[MSM8998_VDDCX_VFL] = &msm8998_vddcx_vfl,
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[MSM8998_VDDMX] = &msm8998_vddmx,
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[MSM8998_VDDMX_AO] = &msm8998_vddmx_ao,
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[MSM8998_VDDMX_VFL] = &msm8998_vddmx_vfl,
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[MSM8998_SSCCX] = &msm8998_vdd_ssccx,
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[MSM8998_SSCCX_VFL] = &msm8998_vdd_ssccx_vfl,
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[MSM8998_SSCMX] = &msm8998_vdd_sscmx,
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[MSM8998_SSCMX_VFL] = &msm8998_vdd_sscmx_vfl,
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};
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static const struct rpmpd_desc msm8998_desc = {
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.rpmpds = msm8998_rpmpds,
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.num_pds = ARRAY_SIZE(msm8998_rpmpds),
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.max_state = RPM_SMD_LEVEL_BINNING,
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};
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/* qcs404 RPM Power domains */
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DEFINE_RPMPD_PAIR(qcs404, vddmx, vddmx_ao, RWMX, LEVEL, 0);
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DEFINE_RPMPD_VFL(qcs404, vddmx_vfl, RWMX, 0);
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DEFINE_RPMPD_LEVEL(qcs404, vdd_lpicx, RWLC, 0);
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DEFINE_RPMPD_VFL(qcs404, vdd_lpicx_vfl, RWLC, 0);
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DEFINE_RPMPD_LEVEL(qcs404, vdd_lpimx, RWLM, 0);
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DEFINE_RPMPD_VFL(qcs404, vdd_lpimx_vfl, RWLM, 0);
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static struct rpmpd *qcs404_rpmpds[] = {
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[QCS404_VDDMX] = &qcs404_vddmx,
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[QCS404_VDDMX_AO] = &qcs404_vddmx_ao,
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[QCS404_VDDMX_VFL] = &qcs404_vddmx_vfl,
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[QCS404_LPICX] = &qcs404_vdd_lpicx,
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[QCS404_LPICX_VFL] = &qcs404_vdd_lpicx_vfl,
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[QCS404_LPIMX] = &qcs404_vdd_lpimx,
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[QCS404_LPIMX_VFL] = &qcs404_vdd_lpimx_vfl,
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};
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static const struct rpmpd_desc qcs404_desc = {
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.rpmpds = qcs404_rpmpds,
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.num_pds = ARRAY_SIZE(qcs404_rpmpds),
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.max_state = RPM_SMD_LEVEL_BINNING,
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};
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static const struct of_device_id rpmpd_match_table[] = {
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{ .compatible = "qcom,msm8976-rpmpd", .data = &msm8976_desc },
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{ .compatible = "qcom,msm8996-rpmpd", .data = &msm8996_desc },
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{ .compatible = "qcom,msm8998-rpmpd", .data = &msm8998_desc },
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{ .compatible = "qcom,qcs404-rpmpd", .data = &qcs404_desc },
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{ }
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};
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static int rpmpd_send_enable(struct rpmpd *pd, bool enable)
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{
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struct rpmpd_req req = {
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.key = KEY_ENABLE,
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.nbytes = cpu_to_le32(sizeof(u32)),
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.value = cpu_to_le32(enable),
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};
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return qcom_rpm_smd_write(pd->rpm, QCOM_SMD_RPM_ACTIVE_STATE,
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pd->res_type, pd->res_id, &req, sizeof(req));
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}
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static int rpmpd_send_corner(struct rpmpd *pd, int state, unsigned int corner)
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{
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struct rpmpd_req req = {
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.key = pd->key,
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.nbytes = cpu_to_le32(sizeof(u32)),
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.value = cpu_to_le32(corner),
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};
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return qcom_rpm_smd_write(pd->rpm, state, pd->res_type, pd->res_id,
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&req, sizeof(req));
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};
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static void to_active_sleep(struct rpmpd *pd, unsigned int corner,
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unsigned int *active, unsigned int *sleep)
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{
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*active = corner;
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if (pd->active_only)
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*sleep = 0;
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else
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*sleep = *active;
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}
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static int rpmpd_aggregate_corner(struct rpmpd *pd)
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{
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int ret;
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struct rpmpd *peer = pd->peer;
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unsigned int active_corner, sleep_corner;
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unsigned int this_active_corner = 0, this_sleep_corner = 0;
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unsigned int peer_active_corner = 0, peer_sleep_corner = 0;
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to_active_sleep(pd, pd->corner, &this_active_corner, &this_sleep_corner);
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if (peer && peer->enabled)
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to_active_sleep(peer, peer->corner, &peer_active_corner,
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&peer_sleep_corner);
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active_corner = max(this_active_corner, peer_active_corner);
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ret = rpmpd_send_corner(pd, QCOM_SMD_RPM_ACTIVE_STATE, active_corner);
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if (ret)
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return ret;
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sleep_corner = max(this_sleep_corner, peer_sleep_corner);
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return rpmpd_send_corner(pd, QCOM_SMD_RPM_SLEEP_STATE, sleep_corner);
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}
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static int rpmpd_power_on(struct generic_pm_domain *domain)
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{
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int ret;
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struct rpmpd *pd = domain_to_rpmpd(domain);
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mutex_lock(&rpmpd_lock);
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ret = rpmpd_send_enable(pd, true);
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if (ret)
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goto out;
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pd->enabled = true;
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if (pd->corner)
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ret = rpmpd_aggregate_corner(pd);
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out:
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mutex_unlock(&rpmpd_lock);
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return ret;
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}
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static int rpmpd_power_off(struct generic_pm_domain *domain)
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{
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int ret;
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struct rpmpd *pd = domain_to_rpmpd(domain);
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mutex_lock(&rpmpd_lock);
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ret = rpmpd_send_enable(pd, false);
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if (!ret)
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pd->enabled = false;
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mutex_unlock(&rpmpd_lock);
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return ret;
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}
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static int rpmpd_set_performance(struct generic_pm_domain *domain,
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unsigned int state)
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{
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int ret = 0;
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struct rpmpd *pd = domain_to_rpmpd(domain);
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if (state > pd->max_state)
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state = pd->max_state;
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mutex_lock(&rpmpd_lock);
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pd->corner = state;
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/* Always send updates for vfc and vfl */
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if (!pd->enabled && pd->key != KEY_FLOOR_CORNER &&
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pd->key != KEY_FLOOR_LEVEL)
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goto out;
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ret = rpmpd_aggregate_corner(pd);
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out:
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mutex_unlock(&rpmpd_lock);
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return ret;
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}
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static unsigned int rpmpd_get_performance(struct generic_pm_domain *genpd,
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struct dev_pm_opp *opp)
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{
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return dev_pm_opp_get_level(opp);
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}
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static int rpmpd_probe(struct platform_device *pdev)
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{
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int i;
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size_t num;
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struct genpd_onecell_data *data;
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struct qcom_smd_rpm *rpm;
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struct rpmpd **rpmpds;
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const struct rpmpd_desc *desc;
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rpm = dev_get_drvdata(pdev->dev.parent);
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if (!rpm) {
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dev_err(&pdev->dev, "Unable to retrieve handle to RPM\n");
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return -ENODEV;
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}
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desc = of_device_get_match_data(&pdev->dev);
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if (!desc)
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return -EINVAL;
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rpmpds = desc->rpmpds;
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num = desc->num_pds;
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data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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data->domains = devm_kcalloc(&pdev->dev, num, sizeof(*data->domains),
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GFP_KERNEL);
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data->num_domains = num;
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for (i = 0; i < num; i++) {
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if (!rpmpds[i]) {
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dev_warn(&pdev->dev, "rpmpds[] with empty entry at index=%d\n",
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i);
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continue;
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}
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rpmpds[i]->rpm = rpm;
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rpmpds[i]->max_state = desc->max_state;
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rpmpds[i]->pd.power_off = rpmpd_power_off;
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rpmpds[i]->pd.power_on = rpmpd_power_on;
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rpmpds[i]->pd.set_performance_state = rpmpd_set_performance;
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rpmpds[i]->pd.opp_to_performance_state = rpmpd_get_performance;
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pm_genpd_init(&rpmpds[i]->pd, NULL, true);
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data->domains[i] = &rpmpds[i]->pd;
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}
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return of_genpd_add_provider_onecell(pdev->dev.of_node, data);
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}
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static struct platform_driver rpmpd_driver = {
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.driver = {
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.name = "qcom-rpmpd",
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.of_match_table = rpmpd_match_table,
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.suppress_bind_attrs = true,
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},
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.probe = rpmpd_probe,
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};
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static int __init rpmpd_init(void)
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{
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return platform_driver_register(&rpmpd_driver);
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}
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core_initcall(rpmpd_init);
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