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/* Copyright (c) 2016, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#ifndef _SDE_POWER_HANDLE_H_
#define _SDE_POWER_HANDLE_H_
#define MAX_CLIENT_NAME_LEN 128
#define SDE_POWER_HANDLE_DATA_BUS_IB_QUOTA 2000000000
#define SDE_POWER_HANDLE_DATA_BUS_AB_QUOTA 2000000000
/**
* mdss_bus_vote_type: register bus vote type
* VOTE_INDEX_DISABLE: removes the client vote
* VOTE_INDEX_LOW: keeps the lowest vote for register bus
* VOTE_INDEX_MAX: invalid
*/
enum mdss_bus_vote_type {
VOTE_INDEX_DISABLE,
VOTE_INDEX_LOW,
VOTE_INDEX_MAX,
};
/**
* enum sde_power_handle_data_bus_client - type of axi bus clients
* @SDE_POWER_HANDLE_DATA_BUS_CLIENT_RT: core real-time bus client
* @SDE_POWER_HANDLE_DATA_BUS_CLIENT_NRT: core non-real-time bus client
* @SDE_POWER_HANDLE_DATA_BUS_CLIENT_MAX: maximum number of bus client type
*/
enum sde_power_handle_data_bus_client {
SDE_POWER_HANDLE_DATA_BUS_CLIENT_RT,
SDE_POWER_HANDLE_DATA_BUS_CLIENT_NRT,
SDE_POWER_HANDLE_DATA_BUS_CLIENT_MAX
};
/**
* struct sde_power_client: stores the power client for sde driver
* @name: name of the client
* @usecase_ndx: current regs bus vote type
* @refcount: current refcount if multiple modules are using same
* same client for enable/disable. Power module will
* aggregate the refcount and vote accordingly for this
* client.
* @id: assigned during create. helps for debugging.
* @list: list to attach power handle master list
* @ab: arbitrated bandwidth for each bus client
* @ib: instantaneous bandwidth for each bus client
*/
struct sde_power_client {
char name[MAX_CLIENT_NAME_LEN];
short usecase_ndx;
short refcount;
u32 id;
struct list_head list;
u64 ab[SDE_POWER_HANDLE_DATA_BUS_CLIENT_MAX];
u64 ib[SDE_POWER_HANDLE_DATA_BUS_CLIENT_MAX];
};
/**
* struct sde_power_data_handle: power handle struct for data bus
* @data_bus_scale_table: pointer to bus scaling table
* @data_bus_hdl: current data bus handle
* @axi_port_cnt: number of rt axi ports
* @nrt_axi_port_cnt: number of nrt axi ports
* @bus_channels: number of memory bus channels
* @curr_bw_uc_idx: current use case index of data bus
* @ao_bw_uc_idx: active only use case index of data bus
* @bus_ref_cnt: reference count of data bus enable request
* @handoff_pending: True to indicate if bootloader hand-over is pending
*/
struct sde_power_data_bus_handle {
struct msm_bus_scale_pdata *data_bus_scale_table;
u32 data_bus_hdl;
u32 axi_port_cnt;
u32 nrt_axi_port_cnt;
u32 bus_channels;
u32 curr_bw_uc_idx;
u32 ao_bw_uc_idx;
u32 bus_ref_cnt;
int handoff_pending;
};
/**
* struct sde_power_handle: power handle main struct
* @mp: module power for clock and regulator
* @client_clist: master list to store all clients
* @phandle_lock: lock to synchronize the enable/disable
* @dev: pointer to device structure
* @usecase_ndx: current usecase index
* @reg_bus_hdl: current register bus handle
* @data_bus_handle: context structure for data bus control
*/
struct sde_power_handle {
struct dss_module_power mp;
struct list_head power_client_clist;
struct mutex phandle_lock;
struct device *dev;
u32 current_usecase_ndx;
u32 reg_bus_hdl;
struct sde_power_data_bus_handle data_bus_handle;
};
/**
* sde_power_resource_init() - initializes the sde power handle
* @pdev: platform device to search the power resources
* @pdata: power handle to store the power resources
*
* Return: error code.
*/
int sde_power_resource_init(struct platform_device *pdev,
struct sde_power_handle *pdata);
/**
* sde_power_resource_deinit() - release the sde power handle
* @pdev: platform device for power resources
* @pdata: power handle containing the resources
*
* Return: error code.
*/
void sde_power_resource_deinit(struct platform_device *pdev,
struct sde_power_handle *pdata);
/**
* sde_power_client_create() - create the client on power handle
* @pdata: power handle containing the resources
* @client_name: new client name for registration
*
* Return: error code.
*/
struct sde_power_client *sde_power_client_create(struct sde_power_handle *pdata,
char *client_name);
/**
* sde_power_client_destroy() - destroy the client on power handle
* @pdata: power handle containing the resources
* @client_name: new client name for registration
*
* Return: none
*/
void sde_power_client_destroy(struct sde_power_handle *phandle,
struct sde_power_client *client);
/**
* sde_power_resource_enable() - enable/disable the power resources
* @pdata: power handle containing the resources
* @client: client information to enable/disable its vote
* @enable: boolean request for enable/disable
*
* Return: error code.
*/
int sde_power_resource_enable(struct sde_power_handle *pdata,
struct sde_power_client *pclient, bool enable);
/**
* sde_power_clk_set_rate() - set the clock rate
* @pdata: power handle containing the resources
* @clock_name: clock name which needs rate update.
* @rate: Requested rate.
*
* Return: error code.
*/
int sde_power_clk_set_rate(struct sde_power_handle *pdata, char *clock_name,
u64 rate);
/**
* sde_power_clk_get_rate() - get the clock rate
* @pdata: power handle containing the resources
* @clock_name: clock name to get the rate
*
* Return: current clock rate
*/
u64 sde_power_clk_get_rate(struct sde_power_handle *pdata, char *clock_name);
/**
* sde_power_clk_get_max_rate() - get the maximum clock rate
* @pdata: power handle containing the resources
* @clock_name: clock name to get the max rate.
*
* Return: maximum clock rate or 0 if not found.
*/
u64 sde_power_clk_get_max_rate(struct sde_power_handle *pdata,
char *clock_name);
/**
* sde_power_clk_get_clk() - get the clock
* @pdata: power handle containing the resources
* @clock_name: clock name to get the clk pointer.
*
* Return: Pointer to clock
*/
struct clk *sde_power_clk_get_clk(struct sde_power_handle *phandle,
char *clock_name);
/**
* sde_power_data_bus_set_quota() - set data bus quota for power client
* @phandle: power handle containing the resources
* @client: client information to set quota
* @bus_client: real-time or non-real-time bus client
* @ab_quota: arbitrated bus bandwidth
* @ib_quota: instantaneous bus bandwidth
*
* Return: zero if success, or error code otherwise
*/
int sde_power_data_bus_set_quota(struct sde_power_handle *phandle,
struct sde_power_client *pclient,
int bus_client, u64 ab_quota, u64 ib_quota);
/**
* sde_power_data_bus_bandwidth_ctrl() - control data bus bandwidth enable
* @phandle: power handle containing the resources
* @client: client information to bandwidth control
* @enable: true to enable bandwidth for data base
*
* Return: none
*/
void sde_power_data_bus_bandwidth_ctrl(struct sde_power_handle *phandle,
struct sde_power_client *pclient, int enable);
#endif /* _SDE_POWER_HANDLE_H_ */
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