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https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git
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soc: qcom: Add RPM SMD Driver
This is a snapshot of the RPM-SMD driver functionality as of
'commit 0453f0e705df8b("move rpm-smd initcall to
postcore_initcall_sync")' on msm-4.14 branch.
Change-Id: Ie70bca9c28ae2339b45715f7d82839f39e733832
Signed-off-by: Raghavendra Kakarla <[email protected]>
This commit is contained in:
Raghavendra Kakarla
parent
983f8387ac
commit
b12441b932
8 changed files with 2265 additions and 0 deletions
56
include/soc/qcom/rpm-notifier.h
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56
include/soc/qcom/rpm-notifier.h
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@ -0,0 +1,56 @@
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
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*/
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#ifndef __ARCH_ARM_MACH_MSM_RPM_NOTIF_H
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#define __ARCH_ARM_MACH_MSM_RPM_NOTIF_H
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struct msm_rpm_notifier_data {
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uint32_t rsc_type;
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uint32_t rsc_id;
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uint32_t key;
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uint32_t size;
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uint8_t *value;
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};
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/**
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* msm_rpm_register_notifier - Register for sleep set notifications
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*
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* @nb - notifier block to register
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*
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* return 0 on success, errno on failure.
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*/
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int msm_rpm_register_notifier(struct notifier_block *nb);
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/**
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* msm_rpm_unregister_notifier - Unregister previously registered notifications
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*
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* @nb - notifier block to unregister
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*
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* return 0 on success, errno on failure.
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*/
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int msm_rpm_unregister_notifier(struct notifier_block *nb);
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/**
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* msm_rpm_enter_sleep - Notify RPM driver to prepare for entering sleep
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*
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* @bool - flag to enable print contents of sleep buffer.
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* @cpumask - cpumask of next wakeup cpu
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*
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* return 0 on success errno on failure.
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*/
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int msm_rpm_enter_sleep(bool print, const struct cpumask *cpumask);
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/**
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* msm_rpm_exit_sleep - Notify RPM driver about resuming from power collapse
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*/
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void msm_rpm_exit_sleep(void);
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/**
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* msm_rpm_waiting_for_ack - Indicate if there is RPM message
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* pending acknowledgment.
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* returns true for pending messages and false otherwise
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*/
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bool msm_rpm_waiting_for_ack(void);
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#endif /*__ARCH_ARM_MACH_MSM_RPM_NOTIF_H */
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303
include/soc/qcom/rpm-smd.h
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303
include/soc/qcom/rpm-smd.h
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@ -0,0 +1,303 @@
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
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*/
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#include <linux/platform_device.h>
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#ifndef __ARCH_ARM_MACH_MSM_RPM_SMD_H
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#define __ARCH_ARM_MACH_MSM_RPM_SMD_H
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/**
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* enum msm_rpm_set - RPM enumerations for sleep/active set
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* %MSM_RPM_CTX_SET_0: Set resource parameters for active mode.
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* %MSM_RPM_CTX_SET_SLEEP: Set resource parameters for sleep.
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*/
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enum msm_rpm_set {
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MSM_RPM_CTX_ACTIVE_SET,
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MSM_RPM_CTX_SLEEP_SET,
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};
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struct msm_rpm_request;
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struct msm_rpm_kvp {
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uint32_t key;
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uint32_t length;
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uint8_t *data;
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};
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#ifdef CONFIG_MSM_RPM_SMD
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/**
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* msm_rpm_request() - Creates a parent element to identify the
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* resource on the RPM, that stores the KVPs for different fields modified
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* for a hardware resource
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*
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* @set: if the device is setting the active/sleep set parameter
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* for the resource
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* @rsc_type: unsigned 32 bit integer that identifies the type of the resource
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* @rsc_id: unsigned 32 bit that uniquely identifies a resource within a type
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* @num_elements: number of KVPs pairs associated with the resource
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*
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* returns pointer to a msm_rpm_request on success, NULL on error
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*/
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struct msm_rpm_request *msm_rpm_create_request(
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enum msm_rpm_set set, uint32_t rsc_type,
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uint32_t rsc_id, int num_elements);
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/**
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* msm_rpm_request_noirq() - Creates a parent element to identify the
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* resource on the RPM, that stores the KVPs for different fields modified
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* for a hardware resource. This function is similar to msm_rpm_create_request
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* except that it has to be called with interrupts masked.
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*
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* @set: if the device is setting the active/sleep set parameter
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* for the resource
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* @rsc_type: unsigned 32 bit integer that identifies the type of the resource
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* @rsc_id: unsigned 32 bit that uniquely identifies a resource within a type
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* @num_elements: number of KVPs pairs associated with the resource
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*
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* returns pointer to a msm_rpm_request on success, NULL on error
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*/
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struct msm_rpm_request *msm_rpm_create_request_noirq(
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enum msm_rpm_set set, uint32_t rsc_type,
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uint32_t rsc_id, int num_elements);
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/**
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* msm_rpm_add_kvp_data() - Adds a Key value pair to a existing RPM resource.
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*
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* @handle: RPM resource handle to which the data should be appended
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* @key: unsigned integer identify the parameter modified
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* @data: byte array that contains the value corresponding to key.
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* @size: size of data in bytes.
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*
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* returns 0 on success or errno
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*/
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int msm_rpm_add_kvp_data(struct msm_rpm_request *handle,
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uint32_t key, const uint8_t *data, int size);
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/**
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* msm_rpm_add_kvp_data_noirq() - Adds a Key value pair to a existing RPM
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* resource. This function is similar to msm_rpm_add_kvp_data except that it
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* has to be called with interrupts masked.
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*
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* @handle: RPM resource handle to which the data should be appended
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* @key: unsigned integer identify the parameter modified
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* @data: byte array that contains the value corresponding to key.
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* @size: size of data in bytes.
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*
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* returns 0 on success or errno
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*/
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int msm_rpm_add_kvp_data_noirq(struct msm_rpm_request *handle,
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uint32_t key, const uint8_t *data, int size);
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/** msm_rpm_free_request() - clean up the RPM request handle created with
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* msm_rpm_create_request
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*
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* @handle: RPM resource handle to be cleared.
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*/
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void msm_rpm_free_request(struct msm_rpm_request *handle);
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/**
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* msm_rpm_send_request() - Send the RPM messages using SMD. The function
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* assigns a message id before sending the data out to the RPM. RPM hardware
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* uses the message id to acknowledge the messages.
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*
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* @handle: pointer to the msm_rpm_request for the resource being modified.
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*
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* returns non-zero message id on success and zero on a failed transaction.
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* The drivers use message id to wait for ACK from RPM.
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*/
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int msm_rpm_send_request(struct msm_rpm_request *handle);
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/**
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* msm_rpm_send_request_noack() - Send the RPM messages using SMD. The function
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* assigns a message id before sending the data out to the RPM. RPM hardware
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* uses the message id to acknowledge the messages, but this API does not wait
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* on the ACK for this message id and it does not add the message id to the wait
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* list.
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*
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* @handle: pointer to the msm_rpm_request for the resource being modified.
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*
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* returns NULL on success and PTR_ERR on a failed transaction.
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*/
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void *msm_rpm_send_request_noack(struct msm_rpm_request *handle);
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/**
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* msm_rpm_send_request_noirq() - Send the RPM messages using SMD. The
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* function assigns a message id before sending the data out to the RPM.
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* RPM hardware uses the message id to acknowledge the messages. This function
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* is similar to msm_rpm_send_request except that it has to be called with
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* interrupts masked.
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*
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* @handle: pointer to the msm_rpm_request for the resource being modified.
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*
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* returns non-zero message id on success and zero on a failed transaction.
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* The drivers use message id to wait for ACK from RPM.
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*/
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int msm_rpm_send_request_noirq(struct msm_rpm_request *handle);
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/**
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* msm_rpm_wait_for_ack() - A blocking call that waits for acknowledgment of
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* a message from RPM.
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*
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* @msg_id: the return from msm_rpm_send_requests
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*
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* returns 0 on success or errno
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*/
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int msm_rpm_wait_for_ack(uint32_t msg_id);
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/**
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* msm_rpm_wait_for_ack_noirq() - A blocking call that waits for acknowledgment
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* of a message from RPM. This function is similar to msm_rpm_wait_for_ack
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* except that it has to be called with interrupts masked.
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*
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* @msg_id: the return from msm_rpm_send_request
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*
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* returns 0 on success or errno
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*/
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int msm_rpm_wait_for_ack_noirq(uint32_t msg_id);
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/**
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* msm_rpm_send_message() -Wrapper function for clients to send data given an
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* array of key value pairs.
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*
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* @set: if the device is setting the active/sleep set parameter
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* for the resource
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* @rsc_type: unsigned 32 bit integer that identifies the type of the resource
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* @rsc_id: unsigned 32 bit that uniquely identifies a resource within a type
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* @kvp: array of KVP data.
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* @nelem: number of KVPs pairs associated with the message.
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*
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* returns 0 on success and errno on failure.
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*/
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int msm_rpm_send_message(enum msm_rpm_set set, uint32_t rsc_type,
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uint32_t rsc_id, struct msm_rpm_kvp *kvp, int nelems);
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/**
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* msm_rpm_send_message_noack() -Wrapper function for clients to send data
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* given an array of key value pairs without waiting for ack.
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*
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* @set: if the device is setting the active/sleep set parameter
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* for the resource
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* @rsc_type: unsigned 32 bit integer that identifies the type of the resource
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* @rsc_id: unsigned 32 bit that uniquely identifies a resource within a type
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* @kvp: array of KVP data.
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* @nelem: number of KVPs pairs associated with the message.
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*
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* returns NULL on success and PTR_ERR(errno) on failure.
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*/
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void *msm_rpm_send_message_noack(enum msm_rpm_set set, uint32_t rsc_type,
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uint32_t rsc_id, struct msm_rpm_kvp *kvp, int nelems);
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/**
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* msm_rpm_send_message_noirq() -Wrapper function for clients to send data
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* given an array of key value pairs. This function is similar to the
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* msm_rpm_send_message() except that it has to be called with interrupts
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* disabled. Clients should choose the irq version when possible for system
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* performance.
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*
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* @set: if the device is setting the active/sleep set parameter
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* for the resource
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* @rsc_type: unsigned 32 bit integer that identifies the type of the resource
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* @rsc_id: unsigned 32 bit that uniquely identifies a resource within a type
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* @kvp: array of KVP data.
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* @nelem: number of KVPs pairs associated with the message.
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*
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* returns 0 on success and errno on failure.
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*/
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int msm_rpm_send_message_noirq(enum msm_rpm_set set, uint32_t rsc_type,
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uint32_t rsc_id, struct msm_rpm_kvp *kvp, int nelems);
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/**
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* msm_rpm_driver_init() - Initialization function that registers for a
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* rpm platform driver.
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*
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* returns 0 on success.
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*/
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int __init msm_rpm_driver_init(void);
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#else
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static inline struct msm_rpm_request *msm_rpm_create_request(
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enum msm_rpm_set set, uint32_t rsc_type,
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uint32_t rsc_id, int num_elements)
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{
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return NULL;
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}
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static inline struct msm_rpm_request *msm_rpm_create_request_noirq(
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enum msm_rpm_set set, uint32_t rsc_type,
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uint32_t rsc_id, int num_elements)
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{
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return NULL;
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}
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static inline uint32_t msm_rpm_add_kvp_data(struct msm_rpm_request *handle,
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uint32_t key, const uint8_t *data, int count)
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{
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return 0;
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}
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static inline uint32_t msm_rpm_add_kvp_data_noirq(
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struct msm_rpm_request *handle, uint32_t key,
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const uint8_t *data, int count)
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{
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return 0;
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}
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static inline void msm_rpm_free_request(struct msm_rpm_request *handle)
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{
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}
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static inline int msm_rpm_send_request(struct msm_rpm_request *handle)
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{
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return 0;
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}
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static inline int msm_rpm_send_request_noirq(struct msm_rpm_request *handle)
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{
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return 0;
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}
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static inline void *msm_rpm_send_request_noack(struct msm_rpm_request *handle)
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{
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return NULL;
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}
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static inline int msm_rpm_send_message(enum msm_rpm_set set, uint32_t rsc_type,
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uint32_t rsc_id, struct msm_rpm_kvp *kvp, int nelems)
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{
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return 0;
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}
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static inline int msm_rpm_send_message_noirq(enum msm_rpm_set set,
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uint32_t rsc_type, uint32_t rsc_id, struct msm_rpm_kvp *kvp,
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int nelems)
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{
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return 0;
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}
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static inline void *msm_rpm_send_message_noack(enum msm_rpm_set set,
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uint32_t rsc_type, uint32_t rsc_id, struct msm_rpm_kvp *kvp,
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int nelems)
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{
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return NULL;
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}
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static inline int msm_rpm_wait_for_ack(uint32_t msg_id)
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{
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return 0;
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}
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static inline int msm_rpm_wait_for_ack_noirq(uint32_t msg_id)
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{
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return 0;
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}
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static inline int __init msm_rpm_driver_init(void)
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{
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return 0;
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}
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#endif
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#endif /*__ARCH_ARM_MACH_MSM_RPM_SMD_H*/
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