linux/drivers/thermal/samsung/exynos_tmu.c
Lukasz Majewski 1fe391bf02 thermal: exynos: Modify exynos thermal code to use device tree for cpu cooling configuration
Up till now exynos_tmu_data.c was used for storing CPU cooling configuration
data. Now the Exynos thermal core code uses device tree to get this data.
For this purpose generic thermal code for configuring CPU cooling was
used.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
2015-01-24 17:32:03 -04:00

1005 lines
28 KiB
C

/*
* exynos_tmu.c - Samsung EXYNOS TMU (Thermal Management Unit)
*
* Copyright (C) 2011 Samsung Electronics
* Donggeun Kim <dg77.kim@samsung.com>
* Amit Daniel Kachhap <amit.kachhap@linaro.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
#include "exynos_thermal_common.h"
#include "exynos_tmu.h"
/* Exynos generic registers */
#define EXYNOS_TMU_REG_TRIMINFO 0x0
#define EXYNOS_TMU_REG_CONTROL 0x20
#define EXYNOS_TMU_REG_STATUS 0x28
#define EXYNOS_TMU_REG_CURRENT_TEMP 0x40
#define EXYNOS_TMU_REG_INTEN 0x70
#define EXYNOS_TMU_REG_INTSTAT 0x74
#define EXYNOS_TMU_REG_INTCLEAR 0x78
#define EXYNOS_TMU_TEMP_MASK 0xff
#define EXYNOS_TMU_REF_VOLTAGE_SHIFT 24
#define EXYNOS_TMU_REF_VOLTAGE_MASK 0x1f
#define EXYNOS_TMU_BUF_SLOPE_SEL_MASK 0xf
#define EXYNOS_TMU_BUF_SLOPE_SEL_SHIFT 8
#define EXYNOS_TMU_CORE_EN_SHIFT 0
/* Exynos3250 specific registers */
#define EXYNOS_TMU_TRIMINFO_CON1 0x10
/* Exynos4210 specific registers */
#define EXYNOS4210_TMU_REG_THRESHOLD_TEMP 0x44
#define EXYNOS4210_TMU_REG_TRIG_LEVEL0 0x50
/* Exynos5250, Exynos4412, Exynos3250 specific registers */
#define EXYNOS_TMU_TRIMINFO_CON2 0x14
#define EXYNOS_THD_TEMP_RISE 0x50
#define EXYNOS_THD_TEMP_FALL 0x54
#define EXYNOS_EMUL_CON 0x80
#define EXYNOS_TRIMINFO_RELOAD_ENABLE 1
#define EXYNOS_TRIMINFO_25_SHIFT 0
#define EXYNOS_TRIMINFO_85_SHIFT 8
#define EXYNOS_TMU_TRIP_MODE_SHIFT 13
#define EXYNOS_TMU_TRIP_MODE_MASK 0x7
#define EXYNOS_TMU_THERM_TRIP_EN_SHIFT 12
#define EXYNOS_TMU_INTEN_RISE0_SHIFT 0
#define EXYNOS_TMU_INTEN_RISE1_SHIFT 4
#define EXYNOS_TMU_INTEN_RISE2_SHIFT 8
#define EXYNOS_TMU_INTEN_RISE3_SHIFT 12
#define EXYNOS_TMU_INTEN_FALL0_SHIFT 16
#define EXYNOS_EMUL_TIME 0x57F0
#define EXYNOS_EMUL_TIME_MASK 0xffff
#define EXYNOS_EMUL_TIME_SHIFT 16
#define EXYNOS_EMUL_DATA_SHIFT 8
#define EXYNOS_EMUL_DATA_MASK 0xFF
#define EXYNOS_EMUL_ENABLE 0x1
/* Exynos5260 specific */
#define EXYNOS5260_TMU_REG_INTEN 0xC0
#define EXYNOS5260_TMU_REG_INTSTAT 0xC4
#define EXYNOS5260_TMU_REG_INTCLEAR 0xC8
#define EXYNOS5260_EMUL_CON 0x100
/* Exynos4412 specific */
#define EXYNOS4412_MUX_ADDR_VALUE 6
#define EXYNOS4412_MUX_ADDR_SHIFT 20
/*exynos5440 specific registers*/
#define EXYNOS5440_TMU_S0_7_TRIM 0x000
#define EXYNOS5440_TMU_S0_7_CTRL 0x020
#define EXYNOS5440_TMU_S0_7_DEBUG 0x040
#define EXYNOS5440_TMU_S0_7_TEMP 0x0f0
#define EXYNOS5440_TMU_S0_7_TH0 0x110
#define EXYNOS5440_TMU_S0_7_TH1 0x130
#define EXYNOS5440_TMU_S0_7_TH2 0x150
#define EXYNOS5440_TMU_S0_7_IRQEN 0x210
#define EXYNOS5440_TMU_S0_7_IRQ 0x230
/* exynos5440 common registers */
#define EXYNOS5440_TMU_IRQ_STATUS 0x000
#define EXYNOS5440_TMU_PMIN 0x004
#define EXYNOS5440_TMU_INTEN_RISE0_SHIFT 0
#define EXYNOS5440_TMU_INTEN_RISE1_SHIFT 1
#define EXYNOS5440_TMU_INTEN_RISE2_SHIFT 2
#define EXYNOS5440_TMU_INTEN_RISE3_SHIFT 3
#define EXYNOS5440_TMU_INTEN_FALL0_SHIFT 4
#define EXYNOS5440_TMU_TH_RISE4_SHIFT 24
#define EXYNOS5440_EFUSE_SWAP_OFFSET 8
/**
* struct exynos_tmu_data : A structure to hold the private data of the TMU
driver
* @id: identifier of the one instance of the TMU controller.
* @pdata: pointer to the tmu platform/configuration data
* @base: base address of the single instance of the TMU controller.
* @base_second: base address of the common registers of the TMU controller.
* @irq: irq number of the TMU controller.
* @soc: id of the SOC type.
* @irq_work: pointer to the irq work structure.
* @lock: lock to implement synchronization.
* @clk: pointer to the clock structure.
* @clk_sec: pointer to the clock structure for accessing the base_second.
* @temp_error1: fused value of the first point trim.
* @temp_error2: fused value of the second point trim.
* @regulator: pointer to the TMU regulator structure.
* @reg_conf: pointer to structure to register with core thermal.
* @tmu_initialize: SoC specific TMU initialization method
* @tmu_control: SoC specific TMU control method
* @tmu_read: SoC specific TMU temperature read method
* @tmu_set_emulation: SoC specific TMU emulation setting method
* @tmu_clear_irqs: SoC specific TMU interrupts clearing method
*/
struct exynos_tmu_data {
int id;
struct exynos_tmu_platform_data *pdata;
void __iomem *base;
void __iomem *base_second;
int irq;
enum soc_type soc;
struct work_struct irq_work;
struct mutex lock;
struct clk *clk, *clk_sec;
u8 temp_error1, temp_error2;
struct regulator *regulator;
struct thermal_sensor_conf *reg_conf;
int (*tmu_initialize)(struct platform_device *pdev);
void (*tmu_control)(struct platform_device *pdev, bool on);
int (*tmu_read)(struct exynos_tmu_data *data);
void (*tmu_set_emulation)(struct exynos_tmu_data *data,
unsigned long temp);
void (*tmu_clear_irqs)(struct exynos_tmu_data *data);
};
/*
* TMU treats temperature as a mapped temperature code.
* The temperature is converted differently depending on the calibration type.
*/
static int temp_to_code(struct exynos_tmu_data *data, u8 temp)
{
struct exynos_tmu_platform_data *pdata = data->pdata;
int temp_code;
switch (pdata->cal_type) {
case TYPE_TWO_POINT_TRIMMING:
temp_code = (temp - pdata->first_point_trim) *
(data->temp_error2 - data->temp_error1) /
(pdata->second_point_trim - pdata->first_point_trim) +
data->temp_error1;
break;
case TYPE_ONE_POINT_TRIMMING:
temp_code = temp + data->temp_error1 - pdata->first_point_trim;
break;
default:
temp_code = temp + pdata->default_temp_offset;
break;
}
return temp_code;
}
/*
* Calculate a temperature value from a temperature code.
* The unit of the temperature is degree Celsius.
*/
static int code_to_temp(struct exynos_tmu_data *data, u8 temp_code)
{
struct exynos_tmu_platform_data *pdata = data->pdata;
int temp;
switch (pdata->cal_type) {
case TYPE_TWO_POINT_TRIMMING:
temp = (temp_code - data->temp_error1) *
(pdata->second_point_trim - pdata->first_point_trim) /
(data->temp_error2 - data->temp_error1) +
pdata->first_point_trim;
break;
case TYPE_ONE_POINT_TRIMMING:
temp = temp_code - data->temp_error1 + pdata->first_point_trim;
break;
default:
temp = temp_code - pdata->default_temp_offset;
break;
}
return temp;
}
static void sanitize_temp_error(struct exynos_tmu_data *data, u32 trim_info)
{
struct exynos_tmu_platform_data *pdata = data->pdata;
data->temp_error1 = trim_info & EXYNOS_TMU_TEMP_MASK;
data->temp_error2 = ((trim_info >> EXYNOS_TRIMINFO_85_SHIFT) &
EXYNOS_TMU_TEMP_MASK);
if (!data->temp_error1 ||
(pdata->min_efuse_value > data->temp_error1) ||
(data->temp_error1 > pdata->max_efuse_value))
data->temp_error1 = pdata->efuse_value & EXYNOS_TMU_TEMP_MASK;
if (!data->temp_error2)
data->temp_error2 =
(pdata->efuse_value >> EXYNOS_TRIMINFO_85_SHIFT) &
EXYNOS_TMU_TEMP_MASK;
}
static u32 get_th_reg(struct exynos_tmu_data *data, u32 threshold, bool falling)
{
struct exynos_tmu_platform_data *pdata = data->pdata;
int i;
for (i = 0; i < pdata->non_hw_trigger_levels; i++) {
u8 temp = pdata->trigger_levels[i];
if (falling)
temp -= pdata->threshold_falling;
else
threshold &= ~(0xff << 8 * i);
threshold |= temp_to_code(data, temp) << 8 * i;
}
return threshold;
}
static int exynos_tmu_initialize(struct platform_device *pdev)
{
struct exynos_tmu_data *data = platform_get_drvdata(pdev);
int ret;
mutex_lock(&data->lock);
clk_enable(data->clk);
if (!IS_ERR(data->clk_sec))
clk_enable(data->clk_sec);
ret = data->tmu_initialize(pdev);
clk_disable(data->clk);
mutex_unlock(&data->lock);
if (!IS_ERR(data->clk_sec))
clk_disable(data->clk_sec);
return ret;
}
static u32 get_con_reg(struct exynos_tmu_data *data, u32 con)
{
struct exynos_tmu_platform_data *pdata = data->pdata;
if (data->soc == SOC_ARCH_EXYNOS4412 ||
data->soc == SOC_ARCH_EXYNOS3250)
con |= (EXYNOS4412_MUX_ADDR_VALUE << EXYNOS4412_MUX_ADDR_SHIFT);
con &= ~(EXYNOS_TMU_REF_VOLTAGE_MASK << EXYNOS_TMU_REF_VOLTAGE_SHIFT);
con |= pdata->reference_voltage << EXYNOS_TMU_REF_VOLTAGE_SHIFT;
con &= ~(EXYNOS_TMU_BUF_SLOPE_SEL_MASK << EXYNOS_TMU_BUF_SLOPE_SEL_SHIFT);
con |= (pdata->gain << EXYNOS_TMU_BUF_SLOPE_SEL_SHIFT);
if (pdata->noise_cancel_mode) {
con &= ~(EXYNOS_TMU_TRIP_MODE_MASK << EXYNOS_TMU_TRIP_MODE_SHIFT);
con |= (pdata->noise_cancel_mode << EXYNOS_TMU_TRIP_MODE_SHIFT);
}
return con;
}
static void exynos_tmu_control(struct platform_device *pdev, bool on)
{
struct exynos_tmu_data *data = platform_get_drvdata(pdev);
mutex_lock(&data->lock);
clk_enable(data->clk);
data->tmu_control(pdev, on);
clk_disable(data->clk);
mutex_unlock(&data->lock);
}
static int exynos4210_tmu_initialize(struct platform_device *pdev)
{
struct exynos_tmu_data *data = platform_get_drvdata(pdev);
struct exynos_tmu_platform_data *pdata = data->pdata;
unsigned int status;
int ret = 0, threshold_code, i;
status = readb(data->base + EXYNOS_TMU_REG_STATUS);
if (!status) {
ret = -EBUSY;
goto out;
}
sanitize_temp_error(data, readl(data->base + EXYNOS_TMU_REG_TRIMINFO));
/* Write temperature code for threshold */
threshold_code = temp_to_code(data, pdata->threshold);
writeb(threshold_code, data->base + EXYNOS4210_TMU_REG_THRESHOLD_TEMP);
for (i = 0; i < pdata->non_hw_trigger_levels; i++)
writeb(pdata->trigger_levels[i], data->base +
EXYNOS4210_TMU_REG_TRIG_LEVEL0 + i * 4);
data->tmu_clear_irqs(data);
out:
return ret;
}
static int exynos4412_tmu_initialize(struct platform_device *pdev)
{
struct exynos_tmu_data *data = platform_get_drvdata(pdev);
struct exynos_tmu_platform_data *pdata = data->pdata;
unsigned int status, trim_info, con, ctrl, rising_threshold;
int ret = 0, threshold_code, i;
status = readb(data->base + EXYNOS_TMU_REG_STATUS);
if (!status) {
ret = -EBUSY;
goto out;
}
if (data->soc == SOC_ARCH_EXYNOS3250 ||
data->soc == SOC_ARCH_EXYNOS4412 ||
data->soc == SOC_ARCH_EXYNOS5250) {
if (data->soc == SOC_ARCH_EXYNOS3250) {
ctrl = readl(data->base + EXYNOS_TMU_TRIMINFO_CON1);
ctrl |= EXYNOS_TRIMINFO_RELOAD_ENABLE;
writel(ctrl, data->base + EXYNOS_TMU_TRIMINFO_CON1);
}
ctrl = readl(data->base + EXYNOS_TMU_TRIMINFO_CON2);
ctrl |= EXYNOS_TRIMINFO_RELOAD_ENABLE;
writel(ctrl, data->base + EXYNOS_TMU_TRIMINFO_CON2);
}
/* On exynos5420 the triminfo register is in the shared space */
if (data->soc == SOC_ARCH_EXYNOS5420_TRIMINFO)
trim_info = readl(data->base_second + EXYNOS_TMU_REG_TRIMINFO);
else
trim_info = readl(data->base + EXYNOS_TMU_REG_TRIMINFO);
sanitize_temp_error(data, trim_info);
/* Write temperature code for rising and falling threshold */
rising_threshold = readl(data->base + EXYNOS_THD_TEMP_RISE);
rising_threshold = get_th_reg(data, rising_threshold, false);
writel(rising_threshold, data->base + EXYNOS_THD_TEMP_RISE);
writel(get_th_reg(data, 0, true), data->base + EXYNOS_THD_TEMP_FALL);
data->tmu_clear_irqs(data);
/* if last threshold limit is also present */
i = pdata->max_trigger_level - 1;
if (pdata->trigger_levels[i] && pdata->trigger_type[i] == HW_TRIP) {
threshold_code = temp_to_code(data, pdata->trigger_levels[i]);
/* 1-4 level to be assigned in th0 reg */
rising_threshold &= ~(0xff << 8 * i);
rising_threshold |= threshold_code << 8 * i;
writel(rising_threshold, data->base + EXYNOS_THD_TEMP_RISE);
con = readl(data->base + EXYNOS_TMU_REG_CONTROL);
con |= (1 << EXYNOS_TMU_THERM_TRIP_EN_SHIFT);
writel(con, data->base + EXYNOS_TMU_REG_CONTROL);
}
out:
return ret;
}
static int exynos5440_tmu_initialize(struct platform_device *pdev)
{
struct exynos_tmu_data *data = platform_get_drvdata(pdev);
struct exynos_tmu_platform_data *pdata = data->pdata;
unsigned int trim_info = 0, con, rising_threshold;
int ret = 0, threshold_code, i;
/*
* For exynos5440 soc triminfo value is swapped between TMU0 and
* TMU2, so the below logic is needed.
*/
switch (data->id) {
case 0:
trim_info = readl(data->base + EXYNOS5440_EFUSE_SWAP_OFFSET +
EXYNOS5440_TMU_S0_7_TRIM);
break;
case 1:
trim_info = readl(data->base + EXYNOS5440_TMU_S0_7_TRIM);
break;
case 2:
trim_info = readl(data->base - EXYNOS5440_EFUSE_SWAP_OFFSET +
EXYNOS5440_TMU_S0_7_TRIM);
}
sanitize_temp_error(data, trim_info);
/* Write temperature code for rising and falling threshold */
rising_threshold = readl(data->base + EXYNOS5440_TMU_S0_7_TH0);
rising_threshold = get_th_reg(data, rising_threshold, false);
writel(rising_threshold, data->base + EXYNOS5440_TMU_S0_7_TH0);
writel(0, data->base + EXYNOS5440_TMU_S0_7_TH1);
data->tmu_clear_irqs(data);
/* if last threshold limit is also present */
i = pdata->max_trigger_level - 1;
if (pdata->trigger_levels[i] && pdata->trigger_type[i] == HW_TRIP) {
threshold_code = temp_to_code(data, pdata->trigger_levels[i]);
/* 5th level to be assigned in th2 reg */
rising_threshold =
threshold_code << EXYNOS5440_TMU_TH_RISE4_SHIFT;
writel(rising_threshold, data->base + EXYNOS5440_TMU_S0_7_TH2);
con = readl(data->base + EXYNOS5440_TMU_S0_7_CTRL);
con |= (1 << EXYNOS_TMU_THERM_TRIP_EN_SHIFT);
writel(con, data->base + EXYNOS5440_TMU_S0_7_CTRL);
}
/* Clear the PMIN in the common TMU register */
if (!data->id)
writel(0, data->base_second + EXYNOS5440_TMU_PMIN);
return ret;
}
static void exynos4210_tmu_control(struct platform_device *pdev, bool on)
{
struct exynos_tmu_data *data = platform_get_drvdata(pdev);
struct exynos_tmu_platform_data *pdata = data->pdata;
unsigned int con, interrupt_en;
con = get_con_reg(data, readl(data->base + EXYNOS_TMU_REG_CONTROL));
if (on) {
con |= (1 << EXYNOS_TMU_CORE_EN_SHIFT);
interrupt_en =
pdata->trigger_enable[3] << EXYNOS_TMU_INTEN_RISE3_SHIFT |
pdata->trigger_enable[2] << EXYNOS_TMU_INTEN_RISE2_SHIFT |
pdata->trigger_enable[1] << EXYNOS_TMU_INTEN_RISE1_SHIFT |
pdata->trigger_enable[0] << EXYNOS_TMU_INTEN_RISE0_SHIFT;
if (data->soc != SOC_ARCH_EXYNOS4210)
interrupt_en |=
interrupt_en << EXYNOS_TMU_INTEN_FALL0_SHIFT;
} else {
con &= ~(1 << EXYNOS_TMU_CORE_EN_SHIFT);
interrupt_en = 0; /* Disable all interrupts */
}
writel(interrupt_en, data->base + EXYNOS_TMU_REG_INTEN);
writel(con, data->base + EXYNOS_TMU_REG_CONTROL);
}
static void exynos5440_tmu_control(struct platform_device *pdev, bool on)
{
struct exynos_tmu_data *data = platform_get_drvdata(pdev);
struct exynos_tmu_platform_data *pdata = data->pdata;
unsigned int con, interrupt_en;
con = get_con_reg(data, readl(data->base + EXYNOS5440_TMU_S0_7_CTRL));
if (on) {
con |= (1 << EXYNOS_TMU_CORE_EN_SHIFT);
interrupt_en =
pdata->trigger_enable[3] << EXYNOS5440_TMU_INTEN_RISE3_SHIFT |
pdata->trigger_enable[2] << EXYNOS5440_TMU_INTEN_RISE2_SHIFT |
pdata->trigger_enable[1] << EXYNOS5440_TMU_INTEN_RISE1_SHIFT |
pdata->trigger_enable[0] << EXYNOS5440_TMU_INTEN_RISE0_SHIFT;
interrupt_en |= interrupt_en << EXYNOS5440_TMU_INTEN_FALL0_SHIFT;
} else {
con &= ~(1 << EXYNOS_TMU_CORE_EN_SHIFT);
interrupt_en = 0; /* Disable all interrupts */
}
writel(interrupt_en, data->base + EXYNOS5440_TMU_S0_7_IRQEN);
writel(con, data->base + EXYNOS5440_TMU_S0_7_CTRL);
}
static int exynos_tmu_read(struct exynos_tmu_data *data)
{
int ret;
mutex_lock(&data->lock);
clk_enable(data->clk);
ret = data->tmu_read(data);
if (ret >= 0)
ret = code_to_temp(data, ret);
clk_disable(data->clk);
mutex_unlock(&data->lock);
return ret;
}
#ifdef CONFIG_THERMAL_EMULATION
static u32 get_emul_con_reg(struct exynos_tmu_data *data, unsigned int val,
unsigned long temp)
{
if (temp) {
temp /= MCELSIUS;
if (data->soc != SOC_ARCH_EXYNOS5440) {
val &= ~(EXYNOS_EMUL_TIME_MASK << EXYNOS_EMUL_TIME_SHIFT);
val |= (EXYNOS_EMUL_TIME << EXYNOS_EMUL_TIME_SHIFT);
}
val &= ~(EXYNOS_EMUL_DATA_MASK << EXYNOS_EMUL_DATA_SHIFT);
val |= (temp_to_code(data, temp) << EXYNOS_EMUL_DATA_SHIFT) |
EXYNOS_EMUL_ENABLE;
} else {
val &= ~EXYNOS_EMUL_ENABLE;
}
return val;
}
static void exynos4412_tmu_set_emulation(struct exynos_tmu_data *data,
unsigned long temp)
{
unsigned int val;
u32 emul_con;
if (data->soc == SOC_ARCH_EXYNOS5260)
emul_con = EXYNOS5260_EMUL_CON;
else
emul_con = EXYNOS_EMUL_CON;
val = readl(data->base + emul_con);
val = get_emul_con_reg(data, val, temp);
writel(val, data->base + emul_con);
}
static void exynos5440_tmu_set_emulation(struct exynos_tmu_data *data,
unsigned long temp)
{
unsigned int val;
val = readl(data->base + EXYNOS5440_TMU_S0_7_DEBUG);
val = get_emul_con_reg(data, val, temp);
writel(val, data->base + EXYNOS5440_TMU_S0_7_DEBUG);
}
static int exynos_tmu_set_emulation(void *drv_data, unsigned long temp)
{
struct exynos_tmu_data *data = drv_data;
int ret = -EINVAL;
if (data->soc == SOC_ARCH_EXYNOS4210)
goto out;
if (temp && temp < MCELSIUS)
goto out;
mutex_lock(&data->lock);
clk_enable(data->clk);
data->tmu_set_emulation(data, temp);
clk_disable(data->clk);
mutex_unlock(&data->lock);
return 0;
out:
return ret;
}
#else
#define exynos4412_tmu_set_emulation NULL
#define exynos5440_tmu_set_emulation NULL
static int exynos_tmu_set_emulation(void *drv_data, unsigned long temp)
{ return -EINVAL; }
#endif /* CONFIG_THERMAL_EMULATION */
static int exynos4210_tmu_read(struct exynos_tmu_data *data)
{
int ret = readb(data->base + EXYNOS_TMU_REG_CURRENT_TEMP);
/* "temp_code" should range between 75 and 175 */
return (ret < 75 || ret > 175) ? -ENODATA : ret;
}
static int exynos4412_tmu_read(struct exynos_tmu_data *data)
{
return readb(data->base + EXYNOS_TMU_REG_CURRENT_TEMP);
}
static int exynos5440_tmu_read(struct exynos_tmu_data *data)
{
return readb(data->base + EXYNOS5440_TMU_S0_7_TEMP);
}
static void exynos_tmu_work(struct work_struct *work)
{
struct exynos_tmu_data *data = container_of(work,
struct exynos_tmu_data, irq_work);
unsigned int val_type;
if (!IS_ERR(data->clk_sec))
clk_enable(data->clk_sec);
/* Find which sensor generated this interrupt */
if (data->soc == SOC_ARCH_EXYNOS5440) {
val_type = readl(data->base_second + EXYNOS5440_TMU_IRQ_STATUS);
if (!((val_type >> data->id) & 0x1))
goto out;
}
if (!IS_ERR(data->clk_sec))
clk_disable(data->clk_sec);
exynos_report_trigger(data->reg_conf);
mutex_lock(&data->lock);
clk_enable(data->clk);
/* TODO: take action based on particular interrupt */
data->tmu_clear_irqs(data);
clk_disable(data->clk);
mutex_unlock(&data->lock);
out:
enable_irq(data->irq);
}
static void exynos4210_tmu_clear_irqs(struct exynos_tmu_data *data)
{
unsigned int val_irq;
u32 tmu_intstat, tmu_intclear;
if (data->soc == SOC_ARCH_EXYNOS5260) {
tmu_intstat = EXYNOS5260_TMU_REG_INTSTAT;
tmu_intclear = EXYNOS5260_TMU_REG_INTCLEAR;
} else {
tmu_intstat = EXYNOS_TMU_REG_INTSTAT;
tmu_intclear = EXYNOS_TMU_REG_INTCLEAR;
}
val_irq = readl(data->base + tmu_intstat);
/*
* Clear the interrupts. Please note that the documentation for
* Exynos3250, Exynos4412, Exynos5250 and Exynos5260 incorrectly
* states that INTCLEAR register has a different placing of bits
* responsible for FALL IRQs than INTSTAT register. Exynos5420
* and Exynos5440 documentation is correct (Exynos4210 doesn't
* support FALL IRQs at all).
*/
writel(val_irq, data->base + tmu_intclear);
}
static void exynos5440_tmu_clear_irqs(struct exynos_tmu_data *data)
{
unsigned int val_irq;
val_irq = readl(data->base + EXYNOS5440_TMU_S0_7_IRQ);
/* clear the interrupts */
writel(val_irq, data->base + EXYNOS5440_TMU_S0_7_IRQ);
}
static irqreturn_t exynos_tmu_irq(int irq, void *id)
{
struct exynos_tmu_data *data = id;
disable_irq_nosync(irq);
schedule_work(&data->irq_work);
return IRQ_HANDLED;
}
static const struct of_device_id exynos_tmu_match[] = {
{
.compatible = "samsung,exynos3250-tmu",
.data = &exynos3250_default_tmu_data,
},
{
.compatible = "samsung,exynos4210-tmu",
.data = &exynos4210_default_tmu_data,
},
{
.compatible = "samsung,exynos4412-tmu",
.data = &exynos4412_default_tmu_data,
},
{
.compatible = "samsung,exynos5250-tmu",
.data = &exynos5250_default_tmu_data,
},
{
.compatible = "samsung,exynos5260-tmu",
.data = &exynos5260_default_tmu_data,
},
{
.compatible = "samsung,exynos5420-tmu",
.data = &exynos5420_default_tmu_data,
},
{
.compatible = "samsung,exynos5420-tmu-ext-triminfo",
.data = &exynos5420_default_tmu_data,
},
{
.compatible = "samsung,exynos5440-tmu",
.data = &exynos5440_default_tmu_data,
},
{},
};
MODULE_DEVICE_TABLE(of, exynos_tmu_match);
static inline struct exynos_tmu_platform_data *exynos_get_driver_data(
struct platform_device *pdev, int id)
{
struct exynos_tmu_init_data *data_table;
struct exynos_tmu_platform_data *tmu_data;
const struct of_device_id *match;
match = of_match_node(exynos_tmu_match, pdev->dev.of_node);
if (!match)
return NULL;
data_table = (struct exynos_tmu_init_data *) match->data;
if (!data_table || id >= data_table->tmu_count)
return NULL;
tmu_data = data_table->tmu_data;
return (struct exynos_tmu_platform_data *) (tmu_data + id);
}
static int exynos_map_dt_data(struct platform_device *pdev)
{
struct exynos_tmu_data *data = platform_get_drvdata(pdev);
struct exynos_tmu_platform_data *pdata;
struct resource res;
int ret;
if (!data || !pdev->dev.of_node)
return -ENODEV;
/*
* Try enabling the regulator if found
* TODO: Add regulator as an SOC feature, so that regulator enable
* is a compulsory call.
*/
data->regulator = devm_regulator_get(&pdev->dev, "vtmu");
if (!IS_ERR(data->regulator)) {
ret = regulator_enable(data->regulator);
if (ret) {
dev_err(&pdev->dev, "failed to enable vtmu\n");
return ret;
}
} else {
dev_info(&pdev->dev, "Regulator node (vtmu) not found\n");
}
data->id = of_alias_get_id(pdev->dev.of_node, "tmuctrl");
if (data->id < 0)
data->id = 0;
data->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
if (data->irq <= 0) {
dev_err(&pdev->dev, "failed to get IRQ\n");
return -ENODEV;
}
if (of_address_to_resource(pdev->dev.of_node, 0, &res)) {
dev_err(&pdev->dev, "failed to get Resource 0\n");
return -ENODEV;
}
data->base = devm_ioremap(&pdev->dev, res.start, resource_size(&res));
if (!data->base) {
dev_err(&pdev->dev, "Failed to ioremap memory\n");
return -EADDRNOTAVAIL;
}
pdata = exynos_get_driver_data(pdev, data->id);
if (!pdata) {
dev_err(&pdev->dev, "No platform init data supplied.\n");
return -ENODEV;
}
data->pdata = pdata;
data->soc = pdata->type;
switch (data->soc) {
case SOC_ARCH_EXYNOS4210:
data->tmu_initialize = exynos4210_tmu_initialize;
data->tmu_control = exynos4210_tmu_control;
data->tmu_read = exynos4210_tmu_read;
data->tmu_clear_irqs = exynos4210_tmu_clear_irqs;
break;
case SOC_ARCH_EXYNOS3250:
case SOC_ARCH_EXYNOS4412:
case SOC_ARCH_EXYNOS5250:
case SOC_ARCH_EXYNOS5260:
case SOC_ARCH_EXYNOS5420:
case SOC_ARCH_EXYNOS5420_TRIMINFO:
data->tmu_initialize = exynos4412_tmu_initialize;
data->tmu_control = exynos4210_tmu_control;
data->tmu_read = exynos4412_tmu_read;
data->tmu_set_emulation = exynos4412_tmu_set_emulation;
data->tmu_clear_irqs = exynos4210_tmu_clear_irqs;
break;
case SOC_ARCH_EXYNOS5440:
data->tmu_initialize = exynos5440_tmu_initialize;
data->tmu_control = exynos5440_tmu_control;
data->tmu_read = exynos5440_tmu_read;
data->tmu_set_emulation = exynos5440_tmu_set_emulation;
data->tmu_clear_irqs = exynos5440_tmu_clear_irqs;
break;
default:
dev_err(&pdev->dev, "Platform not supported\n");
return -EINVAL;
}
/*
* Check if the TMU shares some registers and then try to map the
* memory of common registers.
*/
if (data->soc != SOC_ARCH_EXYNOS5420_TRIMINFO &&
data->soc != SOC_ARCH_EXYNOS5440)
return 0;
if (of_address_to_resource(pdev->dev.of_node, 1, &res)) {
dev_err(&pdev->dev, "failed to get Resource 1\n");
return -ENODEV;
}
data->base_second = devm_ioremap(&pdev->dev, res.start,
resource_size(&res));
if (!data->base_second) {
dev_err(&pdev->dev, "Failed to ioremap memory\n");
return -ENOMEM;
}
return 0;
}
static int exynos_tmu_probe(struct platform_device *pdev)
{
struct exynos_tmu_data *data;
struct exynos_tmu_platform_data *pdata;
struct thermal_sensor_conf *sensor_conf;
int ret, i;
data = devm_kzalloc(&pdev->dev, sizeof(struct exynos_tmu_data),
GFP_KERNEL);
if (!data)
return -ENOMEM;
platform_set_drvdata(pdev, data);
mutex_init(&data->lock);
ret = exynos_map_dt_data(pdev);
if (ret)
return ret;
pdata = data->pdata;
INIT_WORK(&data->irq_work, exynos_tmu_work);
data->clk = devm_clk_get(&pdev->dev, "tmu_apbif");
if (IS_ERR(data->clk)) {
dev_err(&pdev->dev, "Failed to get clock\n");
return PTR_ERR(data->clk);
}
data->clk_sec = devm_clk_get(&pdev->dev, "tmu_triminfo_apbif");
if (IS_ERR(data->clk_sec)) {
if (data->soc == SOC_ARCH_EXYNOS5420_TRIMINFO) {
dev_err(&pdev->dev, "Failed to get triminfo clock\n");
return PTR_ERR(data->clk_sec);
}
} else {
ret = clk_prepare(data->clk_sec);
if (ret) {
dev_err(&pdev->dev, "Failed to get clock\n");
return ret;
}
}
ret = clk_prepare(data->clk);
if (ret) {
dev_err(&pdev->dev, "Failed to get clock\n");
goto err_clk_sec;
}
ret = exynos_tmu_initialize(pdev);
if (ret) {
dev_err(&pdev->dev, "Failed to initialize TMU\n");
goto err_clk;
}
exynos_tmu_control(pdev, true);
/* Allocate a structure to register with the exynos core thermal */
sensor_conf = devm_kzalloc(&pdev->dev,
sizeof(struct thermal_sensor_conf), GFP_KERNEL);
if (!sensor_conf) {
ret = -ENOMEM;
goto err_clk;
}
sprintf(sensor_conf->name, "therm_zone%d", data->id);
sensor_conf->read_temperature = (int (*)(void *))exynos_tmu_read;
sensor_conf->write_emul_temp =
(int (*)(void *, unsigned long))exynos_tmu_set_emulation;
sensor_conf->driver_data = data;
sensor_conf->trip_data.trip_count = pdata->trigger_enable[0] +
pdata->trigger_enable[1] + pdata->trigger_enable[2]+
pdata->trigger_enable[3];
for (i = 0; i < sensor_conf->trip_data.trip_count; i++) {
sensor_conf->trip_data.trip_val[i] =
pdata->threshold + pdata->trigger_levels[i];
sensor_conf->trip_data.trip_type[i] =
pdata->trigger_type[i];
}
sensor_conf->trip_data.trigger_falling = pdata->threshold_falling;
sensor_conf->dev = &pdev->dev;
/* Register the sensor with thermal management interface */
ret = exynos_register_thermal(sensor_conf);
if (ret) {
if (ret != -EPROBE_DEFER)
dev_err(&pdev->dev,
"Failed to register thermal interface: %d\n",
ret);
goto err_clk;
}
data->reg_conf = sensor_conf;
ret = devm_request_irq(&pdev->dev, data->irq, exynos_tmu_irq,
IRQF_TRIGGER_RISING | IRQF_SHARED, dev_name(&pdev->dev), data);
if (ret) {
dev_err(&pdev->dev, "Failed to request irq: %d\n", data->irq);
goto err_clk;
}
return 0;
err_clk:
clk_unprepare(data->clk);
err_clk_sec:
if (!IS_ERR(data->clk_sec))
clk_unprepare(data->clk_sec);
return ret;
}
static int exynos_tmu_remove(struct platform_device *pdev)
{
struct exynos_tmu_data *data = platform_get_drvdata(pdev);
exynos_unregister_thermal(data->reg_conf);
exynos_tmu_control(pdev, false);
clk_unprepare(data->clk);
if (!IS_ERR(data->clk_sec))
clk_unprepare(data->clk_sec);
if (!IS_ERR(data->regulator))
regulator_disable(data->regulator);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int exynos_tmu_suspend(struct device *dev)
{
exynos_tmu_control(to_platform_device(dev), false);
return 0;
}
static int exynos_tmu_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
exynos_tmu_initialize(pdev);
exynos_tmu_control(pdev, true);
return 0;
}
static SIMPLE_DEV_PM_OPS(exynos_tmu_pm,
exynos_tmu_suspend, exynos_tmu_resume);
#define EXYNOS_TMU_PM (&exynos_tmu_pm)
#else
#define EXYNOS_TMU_PM NULL
#endif
static struct platform_driver exynos_tmu_driver = {
.driver = {
.name = "exynos-tmu",
.pm = EXYNOS_TMU_PM,
.of_match_table = exynos_tmu_match,
},
.probe = exynos_tmu_probe,
.remove = exynos_tmu_remove,
};
module_platform_driver(exynos_tmu_driver);
MODULE_DESCRIPTION("EXYNOS TMU Driver");
MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:exynos-tmu");