// SPDX-License-Identifier: GPL-2.0+/* * Surface Platform Profile / Performance Mode driver for Surface System * Aggregator Module (thermal subsystem). * * Copyright (C) 2021-2022 Maximilian Luz <luzmaximilian@gmail.com> */ #include <asm/unaligned.h>#include <linux/kernel.h>#include <linux/module.h>#include <linux/platform_profile.h>#include <linux/types.h> #include <linux/surface_aggregator/device.h> enum ssam_tmp_profile {	SSAM_TMP_PROFILE_NORMAL             = 1,	SSAM_TMP_PROFILE_BATTERY_SAVER      = 2,	SSAM_TMP_PROFILE_BETTER_PERFORMANCE = 3,	SSAM_TMP_PROFILE_BEST_PERFORMANCE   = 4,}; struct ssam_tmp_profile_info {	__le32 profile;	__le16 unknown1;	__le16 unknown2;} __packed; struct ssam_tmp_profile_device {	struct ssam_device *sdev;	struct platform_profile_handler handler;}; SSAM_DEFINE_SYNC_REQUEST_CL_R(__ssam_tmp_profile_get, struct ssam_tmp_profile_info, {	.target_category = SSAM_SSH_TC_TMP,	.command_id      = 0x02,}); SSAM_DEFINE_SYNC_REQUEST_CL_W(__ssam_tmp_profile_set, __le32, {	.target_category = SSAM_SSH_TC_TMP,	.command_id      = 0x03,}); static int ssam_tmp_profile_get(struct ssam_device *sdev, enum ssam_tmp_profile *p){	struct ssam_tmp_profile_info info;	int status; 	status = ssam_retry(__ssam_tmp_profile_get, sdev, &info);	if (status < 0)		return status; 	*p = le32_to_cpu(info.profile);	return 0;} static int ssam_tmp_profile_set(struct ssam_device *sdev, enum ssam_tmp_profile p){	__le32 profile_le = cpu_to_le32(p); 	return ssam_retry(__ssam_tmp_profile_set, sdev, &profile_le);} static int convert_ssam_to_profile(struct ssam_device *sdev, enum ssam_tmp_profile p){	switch (p) {	case SSAM_TMP_PROFILE_NORMAL:		return PLATFORM_PROFILE_BALANCED; 	case SSAM_TMP_PROFILE_BATTERY_SAVER:		return PLATFORM_PROFILE_LOW_POWER; 	case SSAM_TMP_PROFILE_BETTER_PERFORMANCE:		return PLATFORM_PROFILE_BALANCED_PERFORMANCE; 	case SSAM_TMP_PROFILE_BEST_PERFORMANCE:		return PLATFORM_PROFILE_PERFORMANCE; 	default:		dev_err(&sdev->dev, "invalid performance profile: %d", p);		return -EINVAL;	}} static int convert_profile_to_ssam(struct ssam_device *sdev, enum platform_profile_option p){	switch (p) {	case PLATFORM_PROFILE_LOW_POWER:		return SSAM_TMP_PROFILE_BATTERY_SAVER; 	case PLATFORM_PROFILE_BALANCED:		return SSAM_TMP_PROFILE_NORMAL; 	case PLATFORM_PROFILE_BALANCED_PERFORMANCE:		return SSAM_TMP_PROFILE_BETTER_PERFORMANCE; 	case PLATFORM_PROFILE_PERFORMANCE:		return SSAM_TMP_PROFILE_BEST_PERFORMANCE; 	default:		/* This should have already been caught by platform_profile_store(). */		WARN(true, "unsupported platform profile");		return -EOPNOTSUPP;	}} static int ssam_platform_profile_get(struct platform_profile_handler *pprof,				     enum platform_profile_option *profile){	struct ssam_tmp_profile_device *tpd;	enum ssam_tmp_profile tp;	int status; 	tpd = container_of(pprof, struct ssam_tmp_profile_device, handler); 	status = ssam_tmp_profile_get(tpd->sdev, &tp);	if (status)		return status; 	status = convert_ssam_to_profile(tpd->sdev, tp);	if (status < 0)		return status; 	*profile = status;	return 0;} static int ssam_platform_profile_set(struct platform_profile_handler *pprof,				     enum platform_profile_option profile){	struct ssam_tmp_profile_device *tpd;	int tp; 	tpd = container_of(pprof, struct ssam_tmp_profile_device, handler); 	tp = convert_profile_to_ssam(tpd->sdev, profile);	if (tp < 0)		return tp; 	return ssam_tmp_profile_set(tpd->sdev, tp);} static int surface_platform_profile_probe(struct ssam_device *sdev){	struct ssam_tmp_profile_device *tpd; 	tpd = devm_kzalloc(&sdev->dev, sizeof(*tpd), GFP_KERNEL);	if (!tpd)		return -ENOMEM; 	tpd->sdev = sdev; 	tpd->handler.profile_get = ssam_platform_profile_get;	tpd->handler.profile_set = ssam_platform_profile_set; 	set_bit(PLATFORM_PROFILE_LOW_POWER, tpd->handler.choices);	set_bit(PLATFORM_PROFILE_BALANCED, tpd->handler.choices);	set_bit(PLATFORM_PROFILE_BALANCED_PERFORMANCE, tpd->handler.choices);	set_bit(PLATFORM_PROFILE_PERFORMANCE, tpd->handler.choices); 	platform_profile_register(&tpd->handler);	return 0;} static void surface_platform_profile_remove(struct ssam_device *sdev){	platform_profile_remove();} static const struct ssam_device_id ssam_platform_profile_match[] = {	{ SSAM_SDEV(TMP, 0x01, 0x00, 0x01) },	{ },};MODULE_DEVICE_TABLE(ssam, ssam_platform_profile_match); static struct ssam_device_driver surface_platform_profile = {	.probe = surface_platform_profile_probe,	.remove = surface_platform_profile_remove,	.match_table = ssam_platform_profile_match,	.driver = {		.name = "surface_platform_profile",		.probe_type = PROBE_PREFER_ASYNCHRONOUS,	},};module_ssam_device_driver(surface_platform_profile); MODULE_AUTHOR("Maximilian Luz <luzmaximilian@gmail.com>");MODULE_DESCRIPTION("Platform Profile Support for Surface System Aggregator Module");MODULE_LICENSE("GPL");