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/*
*
* (C) COPYRIGHT ARM Limited. All rights reserved.
*
* This program is free software and is provided to you under the terms of the
* GNU General Public License version 2 as published by the Free Software
* Foundation, and any use by you of this program is subject to the terms
* of such GNU licence.
*
* A copy of the licence is included with the program, and can also be obtained
* from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include <linux/ioport.h>
#include <linux/devfreq_cooling.h>
#include <linux/thermal.h>
#include <mali_kbase.h>
#include <mali_kbase_defs.h>
#include <mali_kbase_config.h>
/* Versatile Express (VE) Juno Development Platform */
#define HARD_RESET_AT_POWER_OFF 0
#ifndef CONFIG_OF
static struct kbase_io_resources io_resources = {
.job_irq_number = 65,
.mmu_irq_number = 66,
.gpu_irq_number = 64,
.io_memory_region = {
.start = 0x2D000000,
.end = 0x2D000000 + (4096 * 4) - 1}
};
#endif
static int pm_callback_power_on(struct kbase_device *kbdev)
{
/* Nothing is needed on VExpress, but we may have destroyed GPU state (if the below HARD_RESET code is active) */
return 1;
}
static void pm_callback_power_off(struct kbase_device *kbdev)
{
#if HARD_RESET_AT_POWER_OFF
/* Cause a GPU hard reset to test whether we have actually idled the GPU
* and that we properly reconfigure the GPU on power up.
* Usually this would be dangerous, but if the GPU is working correctly it should
* be completely safe as the GPU should not be active at this point.
* However this is disabled normally because it will most likely interfere with
* bus logging etc.
*/
KBASE_TRACE_ADD(kbdev, CORE_GPU_HARD_RESET, NULL, NULL, 0u, 0);
kbase_os_reg_write(kbdev, GPU_CONTROL_REG(GPU_COMMAND), GPU_COMMAND_HARD_RESET);
#endif
}
static struct kbase_pm_callback_conf pm_callbacks = {
.power_on_callback = pm_callback_power_on,
.power_off_callback = pm_callback_power_off,
.power_suspend_callback = NULL,
.power_resume_callback = NULL
};
#define FALLBACK_STATIC_TEMPERATURE 55000
static unsigned long juno_model_static_power(unsigned long voltage)
{
struct thermal_zone_device *tz;
unsigned long temperature, temp;
unsigned long temp_squared, temp_cubed, temp_scaling_factor;
const unsigned long coefficient = (410UL << 20) / (729000000UL >> 10);
const unsigned long voltage_cubed = (voltage * voltage * voltage) >> 10;
tz = thermal_zone_get_zone_by_name("gpu");
if (IS_ERR(tz)) {
pr_warn_ratelimited("Error getting gpu thermal zone (%ld), not yet ready?\n",
PTR_ERR(tz));
temperature = FALLBACK_STATIC_TEMPERATURE;
} else {
int ret;
ret = tz->ops->get_temp(tz, &temperature);
if (ret) {
pr_warn_ratelimited("Error reading temperature for gpu thermal zone: %d\n",
ret);
temperature = FALLBACK_STATIC_TEMPERATURE;
}
}
/* Calculate the temperature scaling factor. To be applied to the
* voltage scaled power.
*/
temp = temperature / 1000;
temp_squared = temp * temp;
temp_cubed = temp_squared * temp;
temp_scaling_factor =
(2 * temp_cubed)
- (80 * temp_squared)
+ (4700 * temp)
+ 32000;
return (((coefficient * voltage_cubed) >> 20)
* temp_scaling_factor)
/ 1000000;
}
static unsigned long juno_model_dynamic_power(unsigned long freq,
unsigned long voltage)
{
/* The inputs: freq (f) is in Hz, and voltage (v) in mV.
* The coefficient (c) is in mW/(MHz mV mV).
*
* This function calculates the dynamic power after this formula:
* Pdyn (mW) = c (mW/(MHz*mV*mV)) * v (mV) * v (mV) * f (MHz)
*/
const unsigned long v2 = (voltage * voltage) / 1000; /* m*(V*V) */
const unsigned long f_mhz = freq / 1000000; /* MHz */
const unsigned long coefficient = 3600; /* mW/(MHz*mV*mV) */
return (coefficient * v2 * f_mhz) / 1000000; /* mW */
}
struct devfreq_cooling_ops juno_model_ops = {
.get_static_power = juno_model_static_power,
.get_dynamic_power = juno_model_dynamic_power,
};
static struct kbase_attribute config_attributes[] = {
{ KBASE_CONFIG_ATTR_JS_RESET_TIMEOUT_MS, 500 },
{ KBASE_CONFIG_ATTR_POWER_MANAGEMENT_CALLBACKS, ((uintptr_t)&pm_callbacks) },
{ KBASE_CONFIG_ATTR_POWER_MODEL_CALLBACKS, ((uintptr_t)&juno_model_ops) },
{ KBASE_CONFIG_ATTR_END, 0 }
};
static struct kbase_platform_config versatile_platform_config = {
.attributes = config_attributes,
#ifndef CONFIG_OF
.io_resources = &io_resources
#endif
};
struct kbase_platform_config *kbase_get_platform_config(void)
{
return &versatile_platform_config;
}
int kbase_platform_early_init(void)
{
/* Nothing needed at this stage */
return 0;
}
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