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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2015, The Linux Foundation. All rights reserved.
*/
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/bitops.h>
#include <linux/regmap.h>
#include <linux/thermal.h>
#include "tsens.h"
#define CONFIG_ADDR 0x3640
#define CONFIG_ADDR_8660 0x3620
/* CONFIG_ADDR bitmasks */
#define CONFIG 0x9b
#define CONFIG_MASK 0xf
#define CONFIG_8660 1
#define CONFIG_SHIFT_8660 28
#define CONFIG_MASK_8660 (3 << CONFIG_SHIFT_8660)
#define CNTL_ADDR 0x3620
/* CNTL_ADDR bitmasks */
#define EN BIT(0)
#define SW_RST BIT(1)
#define MEASURE_PERIOD BIT(18)
#define SLP_CLK_ENA BIT(26)
#define SLP_CLK_ENA_8660 BIT(24)
#define SENSOR0_SHIFT 3
#define THRESHOLD_ADDR 0x3624
#define INT_STATUS_ADDR 0x363c
#define S0_STATUS_OFF 0x3628
#define S1_STATUS_OFF 0x362c
#define S2_STATUS_OFF 0x3630
#define S3_STATUS_OFF 0x3634
#define S4_STATUS_OFF 0x3638
#define S5_STATUS_OFF 0x3664 /* Sensors 5-10 found on apq8064/msm8960 */
#define S6_STATUS_OFF 0x3668
#define S7_STATUS_OFF 0x366c
#define S8_STATUS_OFF 0x3670
#define S9_STATUS_OFF 0x3674
#define S10_STATUS_OFF 0x3678
/* Original slope - 350 to compensate mC to C inaccuracy */
static u32 tsens_msm8960_slope[] = {
826, 826, 804, 826,
761, 782, 782, 849,
782, 849, 782
};
static int suspend_8960(struct tsens_priv *priv)
{
int ret;
unsigned int mask;
struct regmap *map = priv->tm_map;
ret = regmap_read(map, THRESHOLD_ADDR, &priv->ctx.threshold);
if (ret)
return ret;
ret = regmap_read(map, CNTL_ADDR, &priv->ctx.control);
if (ret)
return ret;
if (priv->num_sensors > 1)
mask = SLP_CLK_ENA | EN;
else
mask = SLP_CLK_ENA_8660 | EN;
ret = regmap_update_bits(map, CNTL_ADDR, mask, 0);
if (ret)
return ret;
return 0;
}
static int resume_8960(struct tsens_priv *priv)
{
int ret;
struct regmap *map = priv->tm_map;
ret = regmap_update_bits(map, CNTL_ADDR, SW_RST, SW_RST);
if (ret)
return ret;
/*
* Separate CONFIG restore is not needed only for 8660 as
* config is part of CTRL Addr and its restored as such
*/
if (priv->num_sensors > 1) {
ret = regmap_update_bits(map, CONFIG_ADDR, CONFIG_MASK, CONFIG);
if (ret)
return ret;
}
ret = regmap_write(map, THRESHOLD_ADDR, priv->ctx.threshold);
if (ret)
return ret;
ret = regmap_write(map, CNTL_ADDR, priv->ctx.control);
if (ret)
return ret;
return 0;
}
static int enable_8960(struct tsens_priv *priv, int id)
{
int ret;
u32 reg, mask = BIT(id);
ret = regmap_read(priv->tm_map, CNTL_ADDR, ®);
if (ret)
return ret;
/* HARDWARE BUG:
* On platforms with more than 6 sensors, all remaining sensors
* must be enabled together, otherwise undefined results are expected.
* (Sensor 6-7 disabled, Sensor 3 disabled...) In the original driver,
* all the sensors are enabled in one step hence this bug is not
* triggered.
*/
if (id > 5)
mask = GENMASK(10, 6);
mask <<= SENSOR0_SHIFT;
/* Sensors already enabled. Skip. */
if ((reg & mask) == mask)
return 0;
ret = regmap_write(priv->tm_map, CNTL_ADDR, reg | SW_RST);
if (ret)
return ret;
reg |= MEASURE_PERIOD;
if (priv->num_sensors > 1)
reg |= mask | SLP_CLK_ENA | EN;
else
reg |= mask | SLP_CLK_ENA_8660 | EN;
ret = regmap_write(priv->tm_map, CNTL_ADDR, reg);
if (ret)
return ret;
return 0;
}
static void disable_8960(struct tsens_priv *priv)
{
int ret;
u32 reg_cntl;
u32 mask;
mask = GENMASK(priv->num_sensors - 1, 0);
mask <<= SENSOR0_SHIFT;
mask |= EN;
ret = regmap_read(priv->tm_map, CNTL_ADDR, ®_cntl);
if (ret)
return;
reg_cntl &= ~mask;
if (priv->num_sensors > 1)
reg_cntl &= ~SLP_CLK_ENA;
else
reg_cntl &= ~SLP_CLK_ENA_8660;
regmap_write(priv->tm_map, CNTL_ADDR, reg_cntl);
}
static int calibrate_8960(struct tsens_priv *priv)
{
int i;
char *data;
u32 p1[11];
data = qfprom_read(priv->dev, "calib");
if (IS_ERR(data))
data = qfprom_read(priv->dev, "calib_backup");
if (IS_ERR(data))
return PTR_ERR(data);
for (i = 0; i < priv->num_sensors; i++) {
p1[i] = data[i];
priv->sensor[i].slope = tsens_msm8960_slope[i];
}
compute_intercept_slope(priv, p1, NULL, ONE_PT_CALIB);
kfree(data);
return 0;
}
static const struct reg_field tsens_8960_regfields[MAX_REGFIELDS] = {
/* ----- SROT ------ */
/* No VERSION information */
/* CNTL */
[TSENS_EN] = REG_FIELD(CNTL_ADDR, 0, 0),
[TSENS_SW_RST] = REG_FIELD(CNTL_ADDR, 1, 1),
/* 8960 has 5 sensors, 8660 has 11, we only handle 5 */
[SENSOR_EN] = REG_FIELD(CNTL_ADDR, 3, 7),
/* ----- TM ------ */
/* INTERRUPT ENABLE */
/* NO INTERRUPT ENABLE */
/* Single UPPER/LOWER TEMPERATURE THRESHOLD for all sensors */
[LOW_THRESH_0] = REG_FIELD(THRESHOLD_ADDR, 0, 7),
[UP_THRESH_0] = REG_FIELD(THRESHOLD_ADDR, 8, 15),
/* MIN_THRESH_0 and MAX_THRESH_0 are not present in the regfield
* Recycle CRIT_THRESH_0 and 1 to set the required regs to hardcoded temp
* MIN_THRESH_0 -> CRIT_THRESH_1
* MAX_THRESH_0 -> CRIT_THRESH_0
*/
[CRIT_THRESH_1] = REG_FIELD(THRESHOLD_ADDR, 16, 23),
[CRIT_THRESH_0] = REG_FIELD(THRESHOLD_ADDR, 24, 31),
/* UPPER/LOWER INTERRUPT [CLEAR/STATUS] */
/* 1 == clear, 0 == normal operation */
[LOW_INT_CLEAR_0] = REG_FIELD(CNTL_ADDR, 9, 9),
[UP_INT_CLEAR_0] = REG_FIELD(CNTL_ADDR, 10, 10),
/* NO CRITICAL INTERRUPT SUPPORT on 8960 */
/* Sn_STATUS */
[LAST_TEMP_0] = REG_FIELD(S0_STATUS_OFF, 0, 7),
[LAST_TEMP_1] = REG_FIELD(S1_STATUS_OFF, 0, 7),
[LAST_TEMP_2] = REG_FIELD(S2_STATUS_OFF, 0, 7),
[LAST_TEMP_3] = REG_FIELD(S3_STATUS_OFF, 0, 7),
[LAST_TEMP_4] = REG_FIELD(S4_STATUS_OFF, 0, 7),
[LAST_TEMP_5] = REG_FIELD(S5_STATUS_OFF, 0, 7),
[LAST_TEMP_6] = REG_FIELD(S6_STATUS_OFF, 0, 7),
[LAST_TEMP_7] = REG_FIELD(S7_STATUS_OFF, 0, 7),
[LAST_TEMP_8] = REG_FIELD(S8_STATUS_OFF, 0, 7),
[LAST_TEMP_9] = REG_FIELD(S9_STATUS_OFF, 0, 7),
[LAST_TEMP_10] = REG_FIELD(S10_STATUS_OFF, 0, 7),
/* No VALID field on 8960 */
/* TSENS_INT_STATUS bits: 1 == threshold violated */
[MIN_STATUS_0] = REG_FIELD(INT_STATUS_ADDR, 0, 0),
[LOWER_STATUS_0] = REG_FIELD(INT_STATUS_ADDR, 1, 1),
[UPPER_STATUS_0] = REG_FIELD(INT_STATUS_ADDR, 2, 2),
/* No CRITICAL field on 8960 */
[MAX_STATUS_0] = REG_FIELD(INT_STATUS_ADDR, 3, 3),
/* TRDY: 1=ready, 0=in progress */
[TRDY] = REG_FIELD(INT_STATUS_ADDR, 7, 7),
};
static const struct tsens_ops ops_8960 = {
.init = init_common,
.calibrate = calibrate_8960,
.get_temp = get_temp_common,
.enable = enable_8960,
.disable = disable_8960,
.suspend = suspend_8960,
.resume = resume_8960,
};
static struct tsens_features tsens_8960_feat = {
.ver_major = VER_0,
.crit_int = 0,
.adc = 1,
.srot_split = 0,
.max_sensors = 11,
};
struct tsens_plat_data data_8960 = {
.num_sensors = 11,
.ops = &ops_8960,
.feat = &tsens_8960_feat,
.fields = tsens_8960_regfields,
};
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