blob: fc05fcecea57d3f51baa1c9e2867a9806c6755ce [file] [log] [blame]
/* Copyright (c) 2011-2013, 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/module.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/platform_device.h>
#include <mach/msm_iomap.h>
#include <mach/socinfo.h>
#include "spm.h"
#include "spm_driver.h"
struct msm_spm_power_modes {
uint32_t mode;
bool notify_rpm;
uint32_t start_addr;
};
struct msm_spm_device {
bool initialized;
struct msm_spm_driver_data reg_data;
struct msm_spm_power_modes *modes;
uint32_t num_modes;
uint32_t cpu_vdd;
};
struct msm_spm_vdd_info {
uint32_t cpu;
uint32_t vlevel;
int err;
};
static struct msm_spm_device msm_spm_l2_device;
static DEFINE_PER_CPU_SHARED_ALIGNED(struct msm_spm_device, msm_cpu_spm_device);
static void msm_spm_smp_set_vdd(void *data)
{
struct msm_spm_device *dev;
struct msm_spm_vdd_info *info = (struct msm_spm_vdd_info *)data;
dev = &per_cpu(msm_cpu_spm_device, info->cpu);
if (!dev->initialized)
return;
dev->cpu_vdd = info->vlevel;
info->err = msm_spm_drv_set_vdd(&dev->reg_data, info->vlevel);
}
/**
* msm_spm_set_vdd(): Set core voltage
* @cpu: core id
* @vlevel: Encoded PMIC data.
*/
int msm_spm_set_vdd(unsigned int cpu, unsigned int vlevel)
{
struct msm_spm_vdd_info info;
int ret;
info.cpu = cpu;
info.vlevel = vlevel;
info.err = -ENODEV;
if ((smp_processor_id() != cpu) && cpu_online(cpu)) {
/**
* We do not want to set the voltage of another core from
* this core, as its possible that we may race the vdd change
* with the SPM state machine of that core, which could also
* be changing the voltage of that core during power collapse.
* Hence, set the function to be executed on that core and block
* until the vdd change is complete.
*/
ret = smp_call_function_single(cpu, msm_spm_smp_set_vdd,
&info, true);
if (!ret)
ret = info.err;
} else {
/**
* Since the core is not online, it is safe to set the vdd
* directly.
*/
msm_spm_smp_set_vdd(&info);
ret = info.err;
}
return ret;
}
EXPORT_SYMBOL(msm_spm_set_vdd);
/**
* msm_spm_get_vdd(): Get core voltage
* @cpu: core id
* @return: Returns encoded PMIC data.
*/
unsigned int msm_spm_get_vdd(unsigned int cpu)
{
struct msm_spm_device *dev;
dev = &per_cpu(msm_cpu_spm_device, cpu);
return dev->cpu_vdd;
}
EXPORT_SYMBOL(msm_spm_get_vdd);
static int msm_spm_dev_set_low_power_mode(struct msm_spm_device *dev,
unsigned int mode, bool notify_rpm)
{
uint32_t i;
uint32_t start_addr = 0;
int ret = -EINVAL;
if (!dev->initialized)
return -ENXIO;
if (mode == MSM_SPM_MODE_DISABLED) {
ret = msm_spm_drv_set_spm_enable(&dev->reg_data, false);
} else if (!msm_spm_drv_set_spm_enable(&dev->reg_data, true)) {
for (i = 0; i < dev->num_modes; i++) {
if ((dev->modes[i].mode == mode) &&
(dev->modes[i].notify_rpm == notify_rpm)) {
start_addr = dev->modes[i].start_addr;
break;
}
}
ret = msm_spm_drv_set_low_power_mode(&dev->reg_data,
start_addr);
}
return ret;
}
static int __devinit msm_spm_dev_init(struct msm_spm_device *dev,
struct msm_spm_platform_data *data)
{
int i, ret = -ENOMEM;
uint32_t offset = 0;
dev->num_modes = data->num_modes;
dev->modes = kmalloc(
sizeof(struct msm_spm_power_modes) * dev->num_modes,
GFP_KERNEL);
if (!dev->modes)
goto spm_failed_malloc;
dev->reg_data.ver_reg = data->ver_reg;
ret = msm_spm_drv_init(&dev->reg_data, data);
if (ret)
goto spm_failed_init;
for (i = 0; i < dev->num_modes; i++) {
/* Default offset is 0 and gets updated as we write more
* sequences into SPM
*/
dev->modes[i].start_addr = offset;
ret = msm_spm_drv_write_seq_data(&dev->reg_data,
data->modes[i].cmd, &offset);
if (ret < 0)
goto spm_failed_init;
dev->modes[i].mode = data->modes[i].mode;
dev->modes[i].notify_rpm = data->modes[i].notify_rpm;
}
msm_spm_drv_flush_seq_entry(&dev->reg_data);
dev->initialized = true;
return 0;
spm_failed_init:
kfree(dev->modes);
spm_failed_malloc:
return ret;
}
/**
* msm_spm_turn_on_cpu_rail(): Power on cpu rail before turning on core
* @cpu: core id
*/
int msm_spm_turn_on_cpu_rail(unsigned int cpu)
{
uint32_t val = 0;
uint32_t timeout = 0;
void *reg = NULL;
void *saw_bases[] = {
0,
MSM_SAW1_BASE,
MSM_SAW2_BASE,
MSM_SAW3_BASE
};
if (cpu == 0 || cpu >= num_possible_cpus())
return -EINVAL;
reg = saw_bases[cpu];
if (soc_class_is_msm8960() || soc_class_is_msm8930() ||
soc_class_is_apq8064()) {
val = 0xA4;
reg += 0x14;
timeout = 512;
} else {
return -ENOSYS;
}
writel_relaxed(val, reg);
mb();
udelay(timeout);
return 0;
}
EXPORT_SYMBOL(msm_spm_turn_on_cpu_rail);
void msm_spm_reinit(void)
{
unsigned int cpu;
for_each_possible_cpu(cpu)
msm_spm_drv_reinit(&per_cpu(msm_cpu_spm_device.reg_data, cpu));
}
EXPORT_SYMBOL(msm_spm_reinit);
/**
* msm_spm_set_low_power_mode() - Configure SPM start address for low power mode
* @mode: SPM LPM mode to enter
* @notify_rpm: Notify RPM in this mode
*/
int msm_spm_set_low_power_mode(unsigned int mode, bool notify_rpm)
{
struct msm_spm_device *dev = &__get_cpu_var(msm_cpu_spm_device);
return msm_spm_dev_set_low_power_mode(dev, mode, notify_rpm);
}
EXPORT_SYMBOL(msm_spm_set_low_power_mode);
/**
* msm_spm_init(): Board initalization function
* @data: platform specific SPM register configuration data
* @nr_devs: Number of SPM devices being initialized
*/
int __init msm_spm_init(struct msm_spm_platform_data *data, int nr_devs)
{
unsigned int cpu;
int ret = 0;
BUG_ON((nr_devs < num_possible_cpus()) || !data);
for_each_possible_cpu(cpu) {
struct msm_spm_device *dev = &per_cpu(msm_cpu_spm_device, cpu);
ret = msm_spm_dev_init(dev, &data[cpu]);
if (ret < 0) {
pr_warn("%s():failed CPU:%u ret:%d\n", __func__,
cpu, ret);
break;
}
}
return ret;
}
#ifdef CONFIG_MSM_L2_SPM
/**
* msm_spm_l2_set_low_power_mode(): Configure L2 SPM start address
* for low power mode
* @mode: SPM LPM mode to enter
* @notify_rpm: Notify RPM in this mode
*/
int msm_spm_l2_set_low_power_mode(unsigned int mode, bool notify_rpm)
{
return msm_spm_dev_set_low_power_mode(
&msm_spm_l2_device, mode, notify_rpm);
}
EXPORT_SYMBOL(msm_spm_l2_set_low_power_mode);
void msm_spm_l2_reinit(void)
{
if (!msm_spm_l2_device.initialized)
return;
msm_spm_drv_reinit(&msm_spm_l2_device.reg_data);
}
EXPORT_SYMBOL(msm_spm_l2_reinit);
/**
* msm_spm_apcs_set_vdd(): Set Apps processor core sub-system voltage
* @vlevel: Encoded PMIC data.
*/
int msm_spm_apcs_set_vdd(unsigned int vlevel)
{
if (!msm_spm_l2_device.initialized)
return -ENXIO;
return msm_spm_drv_set_vdd(&msm_spm_l2_device.reg_data, vlevel);
}
EXPORT_SYMBOL(msm_spm_apcs_set_vdd);
/**
* msm_spm_apcs_set_phase(): Set number of SMPS phases.
* phase_cnt: Number of phases to be set active
*/
int msm_spm_apcs_set_phase(unsigned int phase_cnt)
{
if (!msm_spm_l2_device.initialized)
return -ENXIO;
return msm_spm_drv_set_pmic_data(&msm_spm_l2_device.reg_data,
MSM_SPM_PMIC_PHASE_PORT, phase_cnt);
}
EXPORT_SYMBOL(msm_spm_apcs_set_phase);
/** msm_spm_enable_fts_lpm() : Enable FTS to switch to low power
* when the cores are in low power modes
* @mode: The mode configuration for FTS
*/
int msm_spm_enable_fts_lpm(uint32_t mode)
{
if (!msm_spm_l2_device.initialized)
return -ENXIO;
return msm_spm_drv_set_pmic_data(&msm_spm_l2_device.reg_data,
MSM_SPM_PMIC_PFM_PORT, mode);
}
EXPORT_SYMBOL(msm_spm_enable_fts_lpm);
/**
* msm_spm_l2_init(): Board initialization function
* @data: SPM target specific register configuration
*/
int __init msm_spm_l2_init(struct msm_spm_platform_data *data)
{
return msm_spm_dev_init(&msm_spm_l2_device, data);
}
#endif
static int __devinit msm_spm_dev_probe(struct platform_device *pdev)
{
int ret = 0;
int cpu = 0;
int i = 0;
struct device_node *node = pdev->dev.of_node;
struct msm_spm_platform_data spm_data;
char *key = NULL;
uint32_t val = 0;
struct msm_spm_seq_entry modes[MSM_SPM_MODE_NR];
size_t len = 0;
struct msm_spm_device *dev = NULL;
struct resource *res = NULL;
uint32_t mode_count = 0;
struct spm_of {
char *key;
uint32_t id;
};
struct spm_of spm_of_data[] = {
{"qcom,saw2-cfg", MSM_SPM_REG_SAW2_CFG},
{"qcom,saw2-avs-ctl", MSM_SPM_REG_SAW2_AVS_CTL},
{"qcom,saw2-avs-hysteresis", MSM_SPM_REG_SAW2_AVS_HYSTERESIS},
{"qcom,saw2-avs-limit", MSM_SPM_REG_SAW2_AVS_LIMIT},
{"qcom,saw2-avs-dly", MSM_SPM_REG_SAW2_AVS_DLY},
{"qcom,saw2-spm-dly", MSM_SPM_REG_SAW2_SPM_DLY},
{"qcom,saw2-spm-ctl", MSM_SPM_REG_SAW2_SPM_CTL},
{"qcom,saw2-pmic-data0", MSM_SPM_REG_SAW2_PMIC_DATA_0},
{"qcom,saw2-pmic-data1", MSM_SPM_REG_SAW2_PMIC_DATA_1},
{"qcom,saw2-pmic-data2", MSM_SPM_REG_SAW2_PMIC_DATA_2},
{"qcom,saw2-pmic-data3", MSM_SPM_REG_SAW2_PMIC_DATA_3},
{"qcom,saw2-pmic-data4", MSM_SPM_REG_SAW2_PMIC_DATA_4},
{"qcom,saw2-pmic-data5", MSM_SPM_REG_SAW2_PMIC_DATA_5},
{"qcom,saw2-pmic-data6", MSM_SPM_REG_SAW2_PMIC_DATA_6},
{"qcom,saw2-pmic-data7", MSM_SPM_REG_SAW2_PMIC_DATA_7},
};
struct mode_of {
char *key;
uint32_t id;
uint32_t notify_rpm;
};
struct mode_of of_cpu_modes[] = {
{"qcom,saw2-spm-cmd-wfi", MSM_SPM_MODE_CLOCK_GATING, 0},
{"qcom,saw2-spm-cmd-ret", MSM_SPM_MODE_POWER_RETENTION, 0},
{"qcom,saw2-spm-cmd-spc", MSM_SPM_MODE_POWER_COLLAPSE, 0},
{"qcom,saw2-spm-cmd-pc", MSM_SPM_MODE_POWER_COLLAPSE, 1},
};
struct mode_of of_l2_modes[] = {
{"qcom,saw2-spm-cmd-ret", MSM_SPM_L2_MODE_RETENTION, 1},
{"qcom,saw2-spm-cmd-gdhs", MSM_SPM_L2_MODE_GDHS, 1},
{"qcom,saw2-spm-cmd-pc", MSM_SPM_L2_MODE_POWER_COLLAPSE, 1},
};
struct mode_of *mode_of_data;
int num_modes;
memset(&spm_data, 0, sizeof(struct msm_spm_platform_data));
memset(&modes, 0,
(MSM_SPM_MODE_NR - 2) * sizeof(struct msm_spm_seq_entry));
key = "qcom,core-id";
ret = of_property_read_u32(node, key, &val);
if (ret)
goto fail;
cpu = val;
/*
* Device with id 0..NR_CPUS are SPM for apps cores
* Device with id 0xFFFF is for L2 SPM.
*/
if (cpu >= 0 && cpu < num_possible_cpus()) {
mode_of_data = of_cpu_modes;
num_modes = ARRAY_SIZE(of_cpu_modes);
dev = &per_cpu(msm_cpu_spm_device, cpu);
} else if (cpu == 0xffff) {
mode_of_data = of_l2_modes;
num_modes = ARRAY_SIZE(of_l2_modes);
dev = &msm_spm_l2_device;
} else
return ret;
key = "qcom,saw2-ver-reg";
ret = of_property_read_u32(node, key, &val);
if (ret)
goto fail;
spm_data.ver_reg = val;
key = "qcom,vctl-timeout-us";
ret = of_property_read_u32(node, key, &val);
if (!ret)
spm_data.vctl_timeout_us = val;
else if (cpu == 0xffff)
goto fail;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
goto fail;
spm_data.reg_base_addr = devm_ioremap(&pdev->dev, res->start,
resource_size(res));
if (!spm_data.reg_base_addr)
return -ENOMEM;
spm_data.vctl_port = -1;
spm_data.phase_port = -1;
spm_data.pfm_port = -1;
/* optional */
if (dev == &msm_spm_l2_device) {
key = "qcom,vctl-port";
ret = of_property_read_u32(node, key, &val);
if (!ret)
spm_data.vctl_port = val;
key = "qcom,phase-port";
ret = of_property_read_u32(node, key, &val);
if (!ret)
spm_data.phase_port = val;
key = "qcom,pfm-port";
ret = of_property_read_u32(node, key, &val);
if (!ret)
spm_data.pfm_port = val;
}
for (i = 0; i < ARRAY_SIZE(spm_of_data); i++) {
ret = of_property_read_u32(node, spm_of_data[i].key, &val);
if (ret)
continue;
spm_data.reg_init_values[spm_of_data[i].id] = val;
}
for (i = 0; i < num_modes; i++) {
key = mode_of_data[i].key;
modes[mode_count].cmd =
(uint8_t *)of_get_property(node, key, &len);
if (!modes[mode_count].cmd)
continue;
modes[mode_count].mode = mode_of_data[i].id;
modes[mode_count].notify_rpm = mode_of_data[i].notify_rpm;
mode_count++;
}
spm_data.modes = modes;
spm_data.num_modes = mode_count;
ret = msm_spm_dev_init(dev, &spm_data);
if (ret < 0)
pr_warn("%s():failed core-id:%u ret:%d\n", __func__, cpu, ret);
return ret;
fail:
pr_err("%s: Failed reading node=%s, key=%s\n",
__func__, node->full_name, key);
return -EFAULT;
}
static struct of_device_id msm_spm_match_table[] = {
{.compatible = "qcom,spm-v2"},
{},
};
static struct platform_driver msm_spm_device_driver = {
.probe = msm_spm_dev_probe,
.driver = {
.name = "spm-v2",
.owner = THIS_MODULE,
.of_match_table = msm_spm_match_table,
},
};
/**
* msm_spm_device_init(): Device tree initialization function
*/
int __init msm_spm_device_init(void)
{
return platform_driver_register(&msm_spm_device_driver);
}