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/* Copyright (c) 2014-2015, 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.
*/
#define pr_fmt(fmt) "AXI: %s(): " fmt, __func__
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/radix-tree.h>
#include <linux/clk.h>
#include <linux/msm-bus.h>
#include "msm_bus_core.h"
struct msm_bus_arb_ops arb_ops;
/**
* msm_bus_scale_register_client() - Register the clients with the msm bus
* driver
* @pdata: Platform data of the client, containing src, dest, ab, ib.
* Return non-zero value in case of success, 0 in case of failure.
*
* Client data contains the vectors specifying arbitrated bandwidth (ab)
* and instantaneous bandwidth (ib) requested between a particular
* src and dest.
*/
uint32_t msm_bus_scale_register_client(struct msm_bus_scale_pdata *pdata)
{
if (arb_ops.register_client)
return arb_ops.register_client(pdata);
else {
pr_err("%s: Bus driver not ready.",
__func__);
return 0;
}
}
EXPORT_SYMBOL(msm_bus_scale_register_client);
/**
* msm_bus_scale_client_update_request() - Update the request for bandwidth
* from a particular client
*
* cl: Handle to the client
* index: Index into the vector, to which the bw and clock values need to be
* updated
*/
int msm_bus_scale_client_update_request(uint32_t cl, unsigned int index)
{
if (arb_ops.update_request)
return arb_ops.update_request(cl, index);
else {
pr_err("%s: Bus driver not ready.",
__func__);
return -EPROBE_DEFER;
}
}
EXPORT_SYMBOL(msm_bus_scale_client_update_request);
/**
* msm_bus_scale_client_update_context() - Update the context for a client
* cl: Handle to the client
* active_only: Bool to indicate dual context or active-only context.
* ctx_idx: Voting index to be used when switching contexts.
*/
int msm_bus_scale_client_update_context(uint32_t cl, bool active_only,
unsigned int ctx_idx)
{
if (arb_ops.update_context)
return arb_ops.update_context(cl, active_only, ctx_idx);
return -EPROBE_DEFER;
}
EXPORT_SYMBOL(msm_bus_scale_client_update_context);
/**
* msm_bus_scale_unregister_client() - Unregister the client from the bus driver
* @cl: Handle to the client
*/
void msm_bus_scale_unregister_client(uint32_t cl)
{
if (arb_ops.unregister_client)
arb_ops.unregister_client(cl);
else {
pr_err("%s: Bus driver not ready.",
__func__);
}
}
EXPORT_SYMBOL(msm_bus_scale_unregister_client);
/**
* msm_bus_scale_register() - Register the clients with the msm bus
* driver
*
* @mas: Master ID
* @slv: Slave ID
* @name: descriptive name for this client
* @active_only: Whether or not this bandwidth vote should only be
* effective while the application processor is active.
*
* Client data contains the vectors specifying arbitrated bandwidth (ab)
* and instantaneous bandwidth (ib) requested between a particular
* src and dest.
*/
struct msm_bus_client_handle*
msm_bus_scale_register(uint32_t mas, uint32_t slv, char *name, bool active_only)
{
if (arb_ops.register_cl)
return arb_ops.register_cl(mas, slv, name, active_only);
else {
pr_err("%s: Bus driver not ready.",
__func__);
return ERR_PTR(-EPROBE_DEFER);
}
}
EXPORT_SYMBOL(msm_bus_scale_register);
/**
* msm_bus_scale_client_update_bw() - Update the request for bandwidth
* from a particular client
*
* @cl: Handle to the client
* @ab: Arbitrated bandwidth being requested
* @ib: Instantaneous bandwidth being requested
*/
int msm_bus_scale_update_bw(struct msm_bus_client_handle *cl, u64 ab, u64 ib)
{
if (arb_ops.update_request)
return arb_ops.update_bw(cl, ab, ib);
else {
pr_err("%s: Bus driver not ready.", __func__);
return -EPROBE_DEFER;
}
}
EXPORT_SYMBOL(msm_bus_scale_update_bw);
/**
* msm_bus_scale_change_context() - Update the context for a particular client
* cl: Handle to the client
* act_ab: The average bandwidth(AB) in Bytes/s to be used in active context.
* act_ib: The instantaneous bandwidth(IB) in Bytes/s to be used in active
* context.
* slp_ib: The average bandwidth(AB) in Bytes/s to be used in dual context.
* slp_ab: The instantaneous bandwidth(IB) in Bytes/s to be used in dual
* context.
*/
int
msm_bus_scale_update_bw_context(struct msm_bus_client_handle *cl, u64 act_ab,
u64 act_ib, u64 slp_ib, u64 slp_ab)
{
if (arb_ops.update_context)
return arb_ops.update_bw_context(cl, act_ab, act_ib,
slp_ab, slp_ib);
return -EPROBE_DEFER;
}
EXPORT_SYMBOL(msm_bus_scale_update_bw_context);
/**
* msm_bus_scale_unregister() - Update the request for bandwidth
* from a particular client
*
* cl: Handle to the client
*/
void msm_bus_scale_unregister(struct msm_bus_client_handle *cl)
{
if (arb_ops.unregister)
arb_ops.unregister(cl);
else
pr_err("%s: Bus driver not ready.",
__func__);
}
EXPORT_SYMBOL(msm_bus_scale_unregister);
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