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/* Copyright (c) 2012, 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.
*
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/memory_alloc.h>
#include <mach/memory.h>
#include <mach/scm.h>
#include <mach/msm_dcvs_scm.h>
#include <trace/events/mpdcvs_trace.h>
#define DCVS_CMD_REGISTER_CORE 2
#define DCVS_CMD_SET_ALGO_PARAM 3
#define DCVS_CMD_EVENT 4
#define DCVS_CMD_INIT 5
#define DCVS_CMD_SET_POWER_PARAM 6
struct scm_register_core {
uint32_t core_id;
phys_addr_t core_param_phy;
};
struct scm_algo {
uint32_t core_id;
phys_addr_t algo_phy;
};
struct scm_init {
uint32_t phy;
uint32_t size;
};
struct scm_pwr_param {
uint32_t core_id;
phys_addr_t pwr_param_phy;
phys_addr_t freq_phy;
phys_addr_t coeffs_phy;
};
struct msm_algo_param {
enum msm_dcvs_algo_param_type type;
union {
struct msm_dcvs_algo_param dcvs_param;
struct msm_mpd_algo_param mpd_param;
} u;
};
int msm_dcvs_scm_init(size_t size)
{
int ret = 0;
struct scm_init init;
uint32_t p = 0;
/* Allocate word aligned non-cacheable memory */
p = allocate_contiguous_ebi_nomap(size, 4);
if (!p)
return -ENOMEM;
init.phy = p;
init.size = size;
ret = scm_call(SCM_SVC_DCVS, DCVS_CMD_INIT,
&init, sizeof(init), NULL, 0);
/* Not freed if the initialization succeeds */
if (ret)
free_contiguous_memory_by_paddr(p);
return ret;
}
EXPORT_SYMBOL(msm_dcvs_scm_init);
int msm_dcvs_scm_register_core(uint32_t core_id,
struct msm_dcvs_core_param *param)
{
int ret = 0;
struct scm_register_core reg_data;
struct msm_dcvs_core_param *p = NULL;
p = kzalloc(PAGE_ALIGN(sizeof(struct msm_dcvs_core_param)), GFP_KERNEL);
if (!p)
return -ENOMEM;
memcpy(p, param, sizeof(struct msm_dcvs_core_param));
reg_data.core_id = core_id;
reg_data.core_param_phy = virt_to_phys(p);
ret = scm_call(SCM_SVC_DCVS, DCVS_CMD_REGISTER_CORE,
®_data, sizeof(reg_data), NULL, 0);
kfree(p);
return ret;
}
EXPORT_SYMBOL(msm_dcvs_scm_register_core);
int msm_dcvs_scm_set_algo_params(uint32_t core_id,
struct msm_dcvs_algo_param *param)
{
int ret = 0;
struct scm_algo algo;
struct msm_algo_param *p = NULL;
p = kzalloc(PAGE_ALIGN(sizeof(struct msm_algo_param)), GFP_KERNEL);
if (!p)
return -ENOMEM;
p->type = MSM_DCVS_ALGO_DCVS_PARAM;
memcpy(&p->u.dcvs_param, param, sizeof(struct msm_dcvs_algo_param));
algo.core_id = core_id;
algo.algo_phy = virt_to_phys(p);
ret = scm_call(SCM_SVC_DCVS, DCVS_CMD_SET_ALGO_PARAM,
&algo, sizeof(algo), NULL, 0);
kfree(p);
return ret;
}
EXPORT_SYMBOL(msm_dcvs_scm_set_algo_params);
int msm_mpd_scm_set_algo_params(struct msm_mpd_algo_param *param)
{
int ret = 0;
struct scm_algo algo;
struct msm_algo_param *p = NULL;
p = kzalloc(PAGE_ALIGN(sizeof(struct msm_algo_param)), GFP_KERNEL);
if (!p)
return -ENOMEM;
p->type = MSM_DCVS_ALGO_MPD_PARAM;
memcpy(&p->u.mpd_param, param, sizeof(struct msm_mpd_algo_param));
algo.core_id = 0;
algo.algo_phy = virt_to_phys(p);
ret = scm_call(SCM_SVC_DCVS, DCVS_CMD_SET_ALGO_PARAM,
&algo, sizeof(algo), NULL, 0);
kfree(p);
return ret;
}
EXPORT_SYMBOL(msm_mpd_scm_set_algo_params);
int msm_dcvs_scm_set_power_params(uint32_t core_id,
struct msm_dcvs_power_params *pwr_param,
struct msm_dcvs_freq_entry *freq_entry,
struct msm_dcvs_energy_curve_coeffs *coeffs)
{
int ret = 0;
struct scm_pwr_param pwr;
struct msm_dcvs_power_params *pwrt = NULL;
struct msm_dcvs_freq_entry *freqt = NULL;
struct msm_dcvs_energy_curve_coeffs *coefft = NULL;
pwrt = kzalloc(PAGE_ALIGN(sizeof(struct msm_dcvs_power_params)),
GFP_KERNEL);
if (!pwrt)
return -ENOMEM;
freqt = kzalloc(PAGE_ALIGN(sizeof(struct msm_dcvs_freq_entry)
* pwr_param->num_freq),
GFP_KERNEL);
if (!freqt) {
kfree(pwrt);
return -ENOMEM;
}
coefft = kzalloc(PAGE_ALIGN(
sizeof(struct msm_dcvs_energy_curve_coeffs)),
GFP_KERNEL);
if (!coefft) {
kfree(pwrt);
kfree(freqt);
return -ENOMEM;
}
memcpy(pwrt, pwr_param, sizeof(struct msm_dcvs_power_params));
memcpy(freqt, freq_entry,
sizeof(struct msm_dcvs_freq_entry)*pwr_param->num_freq);
memcpy(coefft, coeffs, sizeof(struct msm_dcvs_energy_curve_coeffs));
pwr.core_id = core_id;
pwr.pwr_param_phy = virt_to_phys(pwrt);
pwr.freq_phy = virt_to_phys(freqt);
pwr.coeffs_phy = virt_to_phys(coefft);
ret = scm_call(SCM_SVC_DCVS, DCVS_CMD_SET_POWER_PARAM,
&pwr, sizeof(pwr), NULL, 0);
kfree(pwrt);
kfree(freqt);
kfree(coefft);
return ret;
}
EXPORT_SYMBOL(msm_dcvs_scm_set_power_params);
int msm_dcvs_scm_event(uint32_t core_id,
enum msm_dcvs_scm_event event_id,
uint32_t param0, uint32_t param1,
uint32_t *ret0, uint32_t *ret1)
{
int ret = -EINVAL;
if (!ret0 || !ret1)
return ret;
ret = scm_call_atomic4_3(SCM_SVC_DCVS, DCVS_CMD_EVENT,
core_id, event_id, param0, param1, ret0, ret1);
trace_msm_dcvs_scm_event(core_id, (int)event_id, param0, param1,
*ret0, *ret1);
return ret;
}
EXPORT_SYMBOL(msm_dcvs_scm_event);
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