// SPDX-License-Identifier: GPL-2.0+
/*
* DA7280 Haptic device driver
*
* Copyright (c) 2020 Dialog Semiconductor.
* Author: Roy Im <Roy.Im.Opensource@diasemi.com>
*/
#include <linux/bitfield.h>
#include <linux/bitops.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/pwm.h>
#include <linux/regmap.h>
#include <linux/workqueue.h>
#include <linux/uaccess.h>
/* Registers */
#define DA7280_IRQ_EVENT1 0x03
#define DA7280_IRQ_EVENT_WARNING_DIAG 0x04
#define DA7280_IRQ_EVENT_SEQ_DIAG 0x05
#define DA7280_IRQ_STATUS1 0x06
#define DA7280_IRQ_MASK1 0x07
#define DA7280_FRQ_LRA_PER_H 0x0A
#define DA7280_FRQ_LRA_PER_L 0x0B
#define DA7280_ACTUATOR1 0x0C
#define DA7280_ACTUATOR2 0x0D
#define DA7280_ACTUATOR3 0x0E
#define DA7280_CALIB_V2I_H 0x0F
#define DA7280_CALIB_V2I_L 0x10
#define DA7280_TOP_CFG1 0x13
#define DA7280_TOP_CFG2 0x14
#define DA7280_TOP_CFG4 0x16
#define DA7280_TOP_INT_CFG1 0x17
#define DA7280_TOP_CTL1 0x22
#define DA7280_TOP_CTL2 0x23
#define DA7280_SEQ_CTL2 0x28
#define DA7280_GPI_0_CTL 0x29
#define DA7280_GPI_1_CTL 0x2A
#define DA7280_GPI_2_CTL 0x2B
#define DA7280_MEM_CTL1 0x2C
#define DA7280_MEM_CTL2 0x2D
#define DA7280_TOP_CFG5 0x6E
#define DA7280_IRQ_MASK2 0x83
#define DA7280_SNP_MEM_99 0xE7
/* Register field */
/* DA7280_IRQ_EVENT1 (Address 0x03) */
#define DA7280_E_SEQ_CONTINUE_MASK BIT(0)
#define DA7280_E_UVLO_MASK BIT(1)
#define DA7280_E_SEQ_DONE_MASK BIT(2)
#define DA7280_E_OVERTEMP_CRIT_MASK BIT(3)
#define DA7280_E_SEQ_FAULT_MASK BIT(4)
#define DA7280_E_WARNING_MASK BIT(5)
#define DA7280_E_ACTUATOR_FAULT_MASK BIT(6)
#define DA7280_E_OC_FAULT_MASK BIT(7)
/* DA7280_IRQ_EVENT_WARNING_DIAG (Address 0x04) */
#define DA7280_E_OVERTEMP_WARN_MASK BIT(3)
#define DA7280_E_MEM_TYPE_MASK BIT(4)
#define DA7280_E_LIM_DRIVE_ACC_MASK BIT(6)
#define DA7280_E_LIM_DRIVE_MASK BIT(7)
/* DA7280_IRQ_EVENT_PAT_DIAG (Address 0x05) */
#define DA7280_E_PWM_FAULT_MASK BIT(5)
#define DA7280_E_MEM_FAULT_MASK BIT(6)
#define DA7280_E_SEQ_ID_FAULT_MASK BIT(7)
/* DA7280_IRQ_STATUS1 (Address 0x06) */
#define DA7280_STA_SEQ_CONTINUE_MASK BIT(0)
#define DA7280_STA_UVLO_VBAT_OK_MASK BIT(1)
#define DA7280_STA_SEQ_DONE_MASK BIT(2)
#define DA7280_STA_OVERTEMP_CRIT_MASK BIT(3)
#define DA7280_STA_SEQ_FAULT_MASK BIT(4)
#define DA7280_STA_WARNING_MASK BIT(5)
#define DA7280_STA_ACTUATOR_MASK BIT(6)
#define DA7280_STA_OC_MASK BIT(7)
/* DA7280_IRQ_MASK1 (Address 0x07) */
#define DA7280_SEQ_CONTINUE_M_MASK BIT(0)
#define DA7280_E_UVLO_M_MASK BIT(1)
#define DA7280_SEQ_DONE_M_MASK BIT(2)
#define DA7280_OVERTEMP_CRIT_M_MASK BIT(3)
#define DA7280_SEQ_FAULT_M_MASK BIT(4)
#define DA7280_WARNING_M_MASK BIT(5)
#define DA7280_ACTUATOR_M_MASK BIT(6)
#define DA7280_OC_M_MASK BIT(7)
/* DA7280_ACTUATOR3 (Address 0x0e) */
#define DA7280_IMAX_MASK GENMASK(4, 0)
/* DA7280_TOP_CFG1 (Address 0x13) */
#define DA7280_AMP_PID_EN_MASK BIT(0)
#define DA7280_RAPID_STOP_EN_MASK BIT(1)
#define DA7280_ACCELERATION_EN_MASK BIT(2)
#define DA7280_FREQ_TRACK_EN_MASK BIT(3)
#define DA7280_BEMF_SENSE_EN_MASK BIT(4)
#define DA7280_ACTUATOR_TYPE_MASK BIT(5)
/* DA7280_TOP_CFG2 (Address 0x14) */
#define DA7280_FULL_BRAKE_THR_MASK GENMASK(3, 0)
#define DA7280_MEM_DATA_SIGNED_MASK BIT(4)
/* DA7280_TOP_CFG4 (Address 0x16) */
#define DA7280_TST_CALIB_IMPEDANCE_DIS_MASK BIT(6)
#define DA7280_V2I_FACTOR_FREEZE_MASK BIT(7)
/* DA7280_TOP_INT_CFG1 (Address 0x17) */
#define DA7280_BEMF_FAULT_LIM_MASK GENMASK(1, 0)
/* DA7280_TOP_CTL1 (Address 0x22) */
#define DA7280_OPERATION_MODE_MASK GENMASK(2, 0)
#define DA7280_STANDBY_EN_MASK BIT(3)
#define DA7280_SEQ_START_MASK BIT(4)
/* DA7280_SEQ_CTL2 (Address 0x28) */
#define DA7280_PS_SEQ_ID_MASK GENMASK(3, 0)
#define DA7280_PS_SEQ_LOOP_MASK GENMASK(7, 4)
/* DA7280_GPIO_0_CTL (Address 0x29) */
#define DA7280_GPI0_POLARITY_MASK GENMASK(1, 0)
#define DA7280_GPI0_MODE_MASK BIT(2)
#define DA7280_GPI0_SEQUENCE_ID_MASK GENMASK(6, 3)
/* DA7280_GPIO_1_CTL (Address 0x2a) */
#define DA7280_GPI1_POLARITY_MASK GENMASK(1, 0)
#define DA7280_GPI1_MODE_MASK BIT(2)
#define DA7280_GPI1_SEQUENCE_ID_MASK GENMASK(6, 3)
/* DA7280_GPIO_2_CTL (Address 0x2b) */
#define DA7280_GPI2_POLARITY_MASK GENMASK(1, 0)
#define DA7280_GPI2_MODE_MASK BIT(2)
#define DA7280_GPI2_SEQUENCE_ID_MASK GENMASK(6, 3)
/* DA7280_MEM_CTL2 (Address 0x2d) */
#define DA7280_WAV_MEM_LOCK_MASK BIT(7)
/* DA7280_TOP_CFG5 (Address 0x6e) */
#define DA7280_V2I_FACTOR_OFFSET_EN_MASK BIT(0)
/* DA7280_IRQ_MASK2 (Address 0x83) */
#define DA7280_ADC_SAT_M_MASK BIT(7)
/* Controls */
#define DA7280_VOLTAGE_RATE_MAX 6000000
#define DA7280_VOLTAGE_RATE_STEP 23400
#define DA7280_NOMMAX_DFT 0x6B
#define DA7280_ABSMAX_DFT 0x78
#define DA7280_IMPD_MAX 1500000000
#define DA7280_IMPD_DEFAULT 22000000
#define DA7280_IMAX_DEFAULT 0x0E
#define DA7280_IMAX_STEP 7200
#define DA7280_IMAX_LIMIT 252000
#define DA7280_RESONT_FREQH_DFT 0x39
#define DA7280_RESONT_FREQL_DFT 0x32
#define DA7280_MIN_RESONAT_FREQ_HZ 50
#define DA7280_MAX_RESONAT_FREQ_HZ 300
#define DA7280_SEQ_ID_MAX 15
#define DA7280_SEQ_LOOP_MAX 15
#define DA7280_GPI_SEQ_ID_DFT 0
#define DA7280_GPI_SEQ_ID_MAX 2
#define DA7280_SNP_MEM_SIZE 100
#define DA7280_SNP_MEM_MAX DA7280_SNP_MEM_99
#define DA7280_IRQ_NUM 3
#define DA7280_SKIP_INIT 0x100
#define DA7280_FF_EFFECT_COUNT_MAX 15
/* Maximum gain is 0x7fff for PWM mode */
#define DA7280_MAX_MAGNITUDE_SHIFT 15
enum da7280_haptic_dev_t {
DA7280_LRA = 0,
DA7280_ERM_BAR = 1,
DA7280_ERM_COIN = 2,
DA7280_DEV_MAX,
};
enum da7280_op_mode {
DA7280_INACTIVE = 0,
DA7280_DRO_MODE = 1,
DA7280_PWM_MODE = 2,
DA7280_RTWM_MODE = 3,
DA7280_ETWM_MODE = 4,
DA7280_OPMODE_MAX,
};
#define DA7280_FF_CONSTANT_DRO 1
#define DA7280_FF_PERIODIC_PWM 2
#define DA7280_FF_PERIODIC_RTWM 1
#define DA7280_FF_PERIODIC_ETWM 2
#define DA7280_FF_PERIODIC_MODE DA7280_RTWM_MODE
#define DA7280_FF_CONSTANT_MODE DA7280_DRO_MODE
enum da7280_custom_effect_param {
DA7280_CUSTOM_SEQ_ID_IDX = 0,
DA7280_CUSTOM_SEQ_LOOP_IDX = 1,
DA7280_CUSTOM_DATA_LEN = 2,
};
enum da7280_custom_gpi_effect_param {
DA7280_CUSTOM_GPI_SEQ_ID_IDX = 0,
DA7280_CUSTOM_GPI_NUM_IDX = 2,
DA7280_CUSTOM_GP_DATA_LEN = 3,
};
struct da7280_gpi_ctl {
u8 seq_id;
u8 mode;
u8 polarity;
};
struct da7280_haptic {
struct regmap *regmap;
struct input_dev *input_dev;
struct device *dev;
struct i2c_client *client;
struct pwm_device *pwm_dev;
bool legacy;
struct work_struct work;
int val;
u16 gain;
s16 level;
u8 dev_type;
u8 op_mode;
u8 const_op_mode;
u8 periodic_op_mode;
u16 nommax;
u16 absmax;
u32 imax;
u32 impd;
u32 resonant_freq_h;
u32 resonant_freq_l;
bool bemf_sense_en;
bool freq_track_en;
bool acc_en;
bool rapid_stop_en;
bool amp_pid_en;
u8 ps_seq_id;
u8 ps_seq_loop;
struct da7280_gpi_ctl gpi_ctl[3];
bool mem_update;
u8 snp_mem[DA7280_SNP_MEM_SIZE];
bool active;
bool suspended;
};
static bool da7280_volatile_register(struct device *dev, unsigned int reg)
{
switch (reg) {
case DA7280_IRQ_EVENT1:
case DA7280_IRQ_EVENT_WARNING_DIAG:
case DA7280_IRQ_EVENT_SEQ_DIAG:
case DA7280_IRQ_STATUS1:
case DA7280_TOP_CTL1:
return true;
default:
return false;
}
}
static const struct regmap_config da7280_haptic_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = DA7280_SNP_MEM_MAX,
.volatile_reg = da7280_volatile_register,
};
static int da7280_haptic_mem_update(struct da7280_haptic *haptics)
{
unsigned int val;
int error;
/* The patterns should be updated when haptic is not working */
error = regmap_read(haptics->regmap, DA7280_IRQ_STATUS1, &val);
if (error)
return error;
if (val & DA7280_STA_WARNING_MASK) {
dev_warn(haptics->dev,
"Warning! Please check HAPTIC status.\n");
return -EBUSY;
}
/* Patterns are not updated if the lock bit is enabled */
val = 0;
error = regmap_read(haptics->regmap, DA7280_MEM_CTL2, &val);
if (error)
return error;
if (~val & DA7280_WAV_MEM_LOCK_MASK) {
dev_warn(haptics->dev, "Please unlock the bit first\n");
return -EACCES;
}
/* Set to Inactive mode to make sure safety */
error = regmap_update_bits(haptics->regmap,
DA7280_TOP_CTL1,
DA7280_OPERATION_MODE_MASK,
0);
if (error)
return error;
error = regmap_read(haptics->regmap, DA7280_MEM_CTL1, &val);
if (error)
return error;
return regmap_bulk_write(haptics->regmap, val, haptics->snp_mem,
DA7280_SNP_MEM_MAX - val + 1);
}
static int da7280_haptic_set_pwm(struct da7280_haptic *haptics, bool enabled)
{
struct pwm_state state;
u64 period_mag_multi;
int error;
if (!haptics->gain && enabled) {
dev_err(haptics->dev, "Unable to enable pwm with 0 gain\n");
return -EINVAL;
}
pwm_get_state(haptics->pwm_dev, &state);
state.enabled = enabled;
if (enabled) {
period_mag_multi = (u64)state.period * haptics->gain;
period_mag_multi >>= DA7280_MAX_MAGNITUDE_SHIFT;
/*
* The interpretation of duty cycle depends on the acc_en,
* it should be between 50% and 100% for acc_en = 0.
* See datasheet 'PWM mode' section.
*/
if (!haptics->acc_en) {
period_mag_multi += state.period;
period_mag_multi /= 2;
}
state.duty_cycle = period_mag_multi;
}
error = pwm_apply_state(haptics->pwm_dev, &state);
if (error)
dev_err(haptics->dev, "Failed to apply pwm state: %d\n", error);
return error;
}
static void da7280_haptic_activate(struct da7280_haptic *haptics)
{
int error;
if (haptics->active)
return;
switch (haptics->op_mode) {
case DA7280_DRO_MODE:
/* the valid range check when acc_en is enabled */
if (haptics->acc_en && haptics->level > 0x7F)
haptics->level = 0x7F;
else if (haptics->level > 0xFF)
haptics->level = 0xFF;
/* Set level as a % of ACTUATOR_NOMMAX (nommax) */
error = regmap_write(haptics->regmap, DA7280_TOP_CTL2,
haptics->level);
if (error) {
dev_err(haptics->dev,
"Failed to set level to %d: %d\n",
haptics->level, error);
return;
}
break;
case DA7280_PWM_MODE:
if (da7280_haptic_set_pwm(haptics, true))
return;
break;
case DA7280_RTWM_MODE:
/*
* The pattern will be played by the PS_SEQ_ID and the
* PS_SEQ_LOOP
*/
break;
case DA7280_ETWM_MODE:
/*
* The pattern will be played by the GPI[N] state,
* GPI(N)_SEQUENCE_ID and the PS_SEQ_LOOP. See the
* datasheet for the details.
*/
break;
default:
dev_err(haptics->dev, "Invalid op mode %d\n", haptics->op_mode);
return;
}
error = regmap_update_bits(haptics->regmap,
DA7280_TOP_CTL1,
DA7280_OPERATION_MODE_MASK,
haptics->op_mode);
if (error) {
dev_err(haptics->dev,
"Failed to set operation mode: %d", error);
return;
}
if (haptics->op_mode == DA7280_PWM_MODE ||
haptics->op_mode == DA7280_RTWM_MODE) {
error = regmap_update_bits(haptics->regmap,
DA7280_TOP_CTL1,
DA7280_SEQ_START_MASK,
DA7280_SEQ_START_MASK);
if (error) {
dev_err(haptics->dev,
"Failed to start sequence: %d\n", error);
return;
}
}
haptics->active = true;
}
static void da7280_haptic_deactivate(struct da7280_haptic *haptics)
{
int error;
if (!haptics->active)
return;
/* Set to Inactive mode */
error = regmap_update_bits(haptics->regmap,
DA7280_TOP_CTL1,
DA7280_OPERATION_MODE_MASK, 0);
if (error) {
dev_err(haptics->dev,
"Failed to clear operation mode: %d", error);
return;
}
switch (haptics->op_mode) {
case DA7280_DRO_MODE:
error = regmap_write(haptics->regmap,
DA7280_TOP_CTL2, 0);
if (error) {
dev_err(haptics->dev,
"Failed to disable DRO mode: %d\n", error);
return;
}
break;
case DA7280_PWM_MODE:
if (da7280_haptic_set_pwm(haptics, false))
return;
break;
case DA7280_RTWM_MODE:
case DA7280_ETWM_MODE:
error = regmap_update_bits(haptics->regmap,
DA7280_TOP_CTL1,
DA7280_SEQ_START_MASK, 0);
if (error) {
dev_err(haptics->dev,
"Failed to disable RTWM/ETWM mode: %d\n",
error);
return;
}
break;
default:
dev_err(haptics->dev, "Invalid op mode %d\n", haptics->op_mode);
return;
}
haptics->active = false;
}
static void da7280_haptic_work(struct work_struct *work)
{
struct da7280_haptic *haptics =
container_of(work, struct da7280_haptic, work);
int val = haptics->val;
if (val)
da7280_haptic_activate(haptics);
else
da7280_haptic_deactivate(haptics);
}
static int da7280_haptics_upload_effect(struct input_dev *dev,
struct ff_effect *effect,
struct ff_effect *old)
{
struct da7280_haptic *haptics = input_get_drvdata(dev);
s16 data[DA7280_SNP_MEM_SIZE] = { 0 };
unsigned int val;
int tmp, i, num;
int error;
/* The effect should be uploaded when haptic is not working */
if (haptics->active)
return -EBUSY;
switch (effect->type) {
/* DRO/PWM modes support this type */
case FF_CONSTANT:
haptics->op_mode = haptics->const_op_mode;
if (haptics->op_mode == DA7280_DRO_MODE) {
tmp = effect->u.constant.level * 254;
haptics->level = tmp / 0x7FFF;
break;
}
haptics->gain = effect->u.constant.level <= 0 ?
0 : effect->u.constant.level;
break;
/* RTWM/ETWM modes support this type */
case FF_PERIODIC:
if (effect->u.periodic.waveform != FF_CUSTOM) {
dev_err(haptics->dev,
"Device can only accept FF_CUSTOM waveform\n");
return -EINVAL;
}
/*
* Load the data and check the length.
* the data will be patterns in this case: 4 < X <= 100,
* and will be saved into the waveform memory inside DA728x.
* If X = 2, the data will be PS_SEQ_ID and PS_SEQ_LOOP.
* If X = 3, the 1st data will be GPIX_SEQUENCE_ID .
*/
if (effect->u.periodic.custom_len == DA7280_CUSTOM_DATA_LEN)
goto set_seq_id_loop;
if (effect->u.periodic.custom_len == DA7280_CUSTOM_GP_DATA_LEN)
goto set_gpix_seq_id;
if (effect->u.periodic.custom_len < DA7280_CUSTOM_DATA_LEN ||
effect->u.periodic.custom_len > DA7280_SNP_MEM_SIZE) {
dev_err(haptics->dev, "Invalid waveform data size\n");
return -EINVAL;
}
if (copy_from_user(data, effect->u.periodic.custom_data,
sizeof(s16) *
effect->u.periodic.custom_len))
return -EFAULT;
memset(haptics->snp_mem, 0, DA7280_SNP_MEM_SIZE);
for (i = 0; i < effect->u.periodic.custom_len; i++) {
if (data[i] < 0 || data[i] > 0xff) {
dev_err(haptics->dev,
"Invalid waveform data %d at offset %d\n",
data[i], i);
return -EINVAL;
}
haptics->snp_mem[i] = (u8)data[i];
}
error = da7280_haptic_mem_update(haptics);
if (error) {
dev_err(haptics->dev,
"Failed to upload waveform: %d\n", error);
return error;
}
break;
set_seq_id_loop:
if (copy_from_user(data, effect->u.periodic.custom_data,
sizeof(s16) * DA7280_CUSTOM_DATA_LEN))
return -EFAULT;
if (data[DA7280_CUSTOM_SEQ_ID_IDX] < 0 ||
data[DA7280_CUSTOM_SEQ_ID_IDX] > DA7280_SEQ_ID_MAX ||
data[DA7280_CUSTOM_SEQ_LOOP_IDX] < 0 ||
data[DA7280_CUSTOM_SEQ_LOOP_IDX] > DA7280_SEQ_LOOP_MAX) {
dev_err(haptics->dev,
"Invalid custom id (%d) or loop (%d)\n",
data[DA7280_CUSTOM_SEQ_ID_IDX],
data[DA7280_CUSTOM_SEQ_LOOP_IDX]);
return -EINVAL;
}
haptics->ps_seq_id = data[DA7280_CUSTOM_SEQ_ID_IDX] & 0x0f;
haptics->ps_seq_loop = data[DA7280_CUSTOM_SEQ_LOOP_IDX] & 0x0f;
haptics->op_mode = haptics->periodic_op_mode;
val = FIELD_PREP(DA7280_PS_SEQ_ID_MASK, haptics->ps_seq_id) |
FIELD_PREP(DA7280_PS_SEQ_LOOP_MASK,
haptics->ps_seq_loop);
error = regmap_write(haptics->regmap, DA7280_SEQ_CTL2, val);
if (error) {
dev_err(haptics->dev,
"Failed to update PS sequence: %d\n", error);
return error;
}
break;
set_gpix_seq_id:
if (copy_from_user(data, effect->u.periodic.custom_data,
sizeof(s16) * DA7280_CUSTOM_GP_DATA_LEN))
return -EFAULT;
if (data[DA7280_CUSTOM_GPI_SEQ_ID_IDX] < 0 ||
data[DA7280_CUSTOM_GPI_SEQ_ID_IDX] > DA7280_SEQ_ID_MAX ||
data[DA7280_CUSTOM_GPI_NUM_IDX] < 0 ||
data[DA7280_CUSTOM_GPI_NUM_IDX] > DA7280_GPI_SEQ_ID_MAX) {
dev_err(haptics->dev,
"Invalid custom GPI id (%d) or num (%d)\n",
data[DA7280_CUSTOM_GPI_SEQ_ID_IDX],
data[DA7280_CUSTOM_GPI_NUM_IDX]);
return -EINVAL;
}
num = data[DA7280_CUSTOM_GPI_NUM_IDX] & 0x0f;
haptics->gpi_ctl[num].seq_id =
data[DA7280_CUSTOM_GPI_SEQ_ID_IDX] & 0x0f;
haptics->op_mode = haptics->periodic_op_mode;
val = FIELD_PREP(DA7280_GPI0_SEQUENCE_ID_MASK,
haptics->gpi_ctl[num].seq_id);
error = regmap_update_bits(haptics->regmap,
DA7280_GPI_0_CTL + num,
DA7280_GPI0_SEQUENCE_ID_MASK,
val);
if (error) {
dev_err(haptics->dev,
"Failed to update GPI sequence: %d\n", error);
return error;
}
break;
default:
dev_err(haptics->dev, "Unsupported effect type: %d\n",
effect->type);
return -EINVAL;
}
return 0;
}
static int da7280_haptics_playback(struct input_dev *dev,
int effect_id, int val)
{
struct da7280_haptic *haptics = input_get_drvdata(dev);
if (!haptics->op_mode) {
dev_warn(haptics->dev, "No effects have been uploaded\n");
return -EINVAL;
}
if (likely(!haptics->suspended)) {
haptics->val = val;
schedule_work(&haptics->work);
}
return 0;
}
static int da7280_haptic_start(struct da7280_haptic *haptics)
{
int error;
error = regmap_update_bits(haptics->regmap,
DA7280_TOP_CTL1,
DA7280_STANDBY_EN_MASK,
DA7280_STANDBY_EN_MASK);
if (error) {
dev_err(haptics->dev, "Unable to enable device: %d\n", error);
return error;
}
return 0;
}
static void da7280_haptic_stop(struct da7280_haptic *haptics)
{
int error;
cancel_work_sync(&haptics->work);
da7280_haptic_deactivate(haptics);
error = regmap_update_bits(haptics->regmap, DA7280_TOP_CTL1,
DA7280_STANDBY_EN_MASK, 0);
if (error)
dev_err(haptics->dev, "Failed to disable device: %d\n", error);
}
static int da7280_haptic_open(struct input_dev *dev)
{
struct da7280_haptic *haptics = input_get_drvdata(dev);
return da7280_haptic_start(haptics);
}
static void da7280_haptic_close(struct input_dev *dev)
{
struct da7280_haptic *haptics = input_get_drvdata(dev);
da7280_haptic_stop(haptics);
}
static u8 da7280_haptic_of_mode_str(struct device *dev,
const char *str)
{
if (!strcmp(str, "LRA")) {
return DA7280_LRA;
} else if (!strcmp(str, "ERM-bar")) {
return DA7280_ERM_BAR;
} else if (!strcmp(str, "ERM-coin")) {
return DA7280_ERM_COIN;
} else {
dev_warn(dev, "Invalid string - set to LRA\n");
return DA7280_LRA;
}
}
static u8 da7280_haptic_of_gpi_mode_str(struct device *dev,
const char *str)
{
if (!strcmp(str, "Single-pattern")) {
return 0;
} else if (!strcmp(str, "Multi-pattern")) {
return 1;
} else {
dev_warn(dev, "Invalid string - set to Single-pattern\n");
return 0;
}
}
static u8 da7280_haptic_of_gpi_pol_str(struct device *dev,
const char *str)
{
if (!strcmp(str, "Rising-edge")) {
return 0;
} else if (!strcmp(str, "Falling-edge")) {
return 1;
} else if (!strcmp(str, "Both-edge")) {
return 2;
} else {
dev_warn(dev, "Invalid string - set to Rising-edge\n");
return 0;
}
}
static u8 da7280_haptic_of_volt_rating_set(u32 val)
{
u32 voltage = val / DA7280_VOLTAGE_RATE_STEP + 1;
return min_t(u32, voltage, 0xff);
}
static void da7280_parse_properties(struct device *dev,
struct da7280_haptic *haptics)
{
unsigned int i, mem[DA7280_SNP_MEM_SIZE];
char gpi_str1[] = "dlg,gpi0-seq-id";
char gpi_str2[] = "dlg,gpi0-mode";
char gpi_str3[] = "dlg,gpi0-polarity";
const char *str;
u32 val;
int error;
/*
* If there is no property, then use the mode programmed into the chip.
*/
haptics->dev_type = DA7280_DEV_MAX;
error = device_property_read_string(dev, "dlg,actuator-type", &str);
if (!error)
haptics->dev_type = da7280_haptic_of_mode_str(dev, str);
haptics->const_op_mode = DA7280_DRO_MODE;
error = device_property_read_u32(dev, "dlg,const-op-mode", &val);
if (!error && val == DA7280_FF_PERIODIC_PWM)
haptics->const_op_mode = DA7280_PWM_MODE;
haptics->periodic_op_mode = DA7280_RTWM_MODE;
error = device_property_read_u32(dev, "dlg,periodic-op-mode", &val);
if (!error && val == DA7280_FF_PERIODIC_ETWM)
haptics->periodic_op_mode = DA7280_ETWM_MODE;
haptics->nommax = DA7280_SKIP_INIT;
error = device_property_read_u32(dev, "dlg,nom-microvolt", &val);
if (!error && val < DA7280_VOLTAGE_RATE_MAX)
haptics->nommax = da7280_haptic_of_volt_rating_set(val);
haptics->absmax = DA7280_SKIP_INIT;
error = device_property_read_u32(dev, "dlg,abs-max-microvolt", &val);
if (!error && val < DA7280_VOLTAGE_RATE_MAX)
haptics->absmax = da7280_haptic_of_volt_rating_set(val);
haptics->imax = DA7280_IMAX_DEFAULT;
error = device_property_read_u32(dev, "dlg,imax-microamp", &val);
if (!error && val < DA7280_IMAX_LIMIT)
haptics->imax = (val - 28600) / DA7280_IMAX_STEP + 1;
haptics->impd = DA7280_IMPD_DEFAULT;
error = device_property_read_u32(dev, "dlg,impd-micro-ohms", &val);
if (!error && val <= DA7280_IMPD_MAX)
haptics->impd = val;
haptics->resonant_freq_h = DA7280_SKIP_INIT;
haptics->resonant_freq_l = DA7280_SKIP_INIT;
error = device_property_read_u32(dev, "dlg,resonant-freq-hz", &val);
if (!error) {
if (val < DA7280_MAX_RESONAT_FREQ_HZ &&
val > DA7280_MIN_RESONAT_FREQ_HZ) {
haptics->resonant_freq_h =
((1000000000 / (val * 1333)) >> 7) & 0xFF;
haptics->resonant_freq_l =
(1000000000 / (val * 1333)) & 0x7F;
} else {
haptics->resonant_freq_h = DA7280_RESONT_FREQH_DFT;
haptics->resonant_freq_l = DA7280_RESONT_FREQL_DFT;
}
}
/* If no property, set to zero as default is to do nothing. */
haptics->ps_seq_id = 0;
error = device_property_read_u32(dev, "dlg,ps-seq-id", &val);
if (!error && val <= DA7280_SEQ_ID_MAX)
haptics->ps_seq_id = val;
haptics->ps_seq_loop = 0;
error = device_property_read_u32(dev, "dlg,ps-seq-loop", &val);
if (!error && val <= DA7280_SEQ_LOOP_MAX)
haptics->ps_seq_loop = val;
/* GPI0~2 Control */
for (i = 0; i <= DA7280_GPI_SEQ_ID_MAX; i++) {
gpi_str1[7] = '0' + i;
haptics->gpi_ctl[i].seq_id = DA7280_GPI_SEQ_ID_DFT + i;
error = device_property_read_u32 (dev, gpi_str1, &val);
if (!error && val <= DA7280_SEQ_ID_MAX)
haptics->gpi_ctl[i].seq_id = val;
gpi_str2[7] = '0' + i;
haptics->gpi_ctl[i].mode = 0;
error = device_property_read_string(dev, gpi_str2, &str);
if (!error)
haptics->gpi_ctl[i].mode =
da7280_haptic_of_gpi_mode_str(dev, str);
gpi_str3[7] = '0' + i;
haptics->gpi_ctl[i].polarity = 0;
error = device_property_read_string(dev, gpi_str3, &str);
if (!error)
haptics->gpi_ctl[i].polarity =
da7280_haptic_of_gpi_pol_str(dev, str);
}
haptics->bemf_sense_en =
device_property_read_bool(dev, "dlg,bemf-sens-enable");
haptics->freq_track_en =
device_property_read_bool(dev, "dlg,freq-track-enable");
haptics->acc_en =
device_property_read_bool(dev, "dlg,acc-enable");
haptics->rapid_stop_en =
device_property_read_bool(dev, "dlg,rapid-stop-enable");
haptics->amp_pid_en =
device_property_read_bool(dev, "dlg,amp-pid-enable");
haptics->mem_update = false;
error = device_property_read_u32_array(dev, "dlg,mem-array",
&mem[0], DA7280_SNP_MEM_SIZE);
if (!error) {
haptics->mem_update = true;
memset(haptics->snp_mem, 0, DA7280_SNP_MEM_SIZE);
for (i = 0; i < DA7280_SNP_MEM_SIZE; i++) {
if (mem[i] <= 0xff) {
haptics->snp_mem[i] = (u8)mem[i];
} else {
dev_err(haptics->dev,
"Invalid data in mem-array at %d: %x\n",
i, mem[i]);
haptics->mem_update = false;
break;
}
}
}
}
static irqreturn_t da7280_irq_handler(int irq, void *data)
{
struct da7280_haptic *haptics = data;
struct device *dev = haptics->dev;
u8 events[DA7280_IRQ_NUM];
int error;
/* Check what events have happened */
error = regmap_bulk_read(haptics->regmap, DA7280_IRQ_EVENT1,
events, sizeof(events));
if (error) {
dev_err(dev, "failed to read interrupt data: %d\n", error);
goto out;
}
/* Clear events */
error = regmap_write(haptics->regmap, DA7280_IRQ_EVENT1, events[0]);
if (error) {
dev_err(dev, "failed to clear interrupts: %d\n", error);
goto out;
}
if (events[0] & DA7280_E_SEQ_FAULT_MASK) {
/*
* Stop first if haptic is active, otherwise, the fault may
* happen continually even though the bit is cleared.
*/
error = regmap_update_bits(haptics->regmap, DA7280_TOP_CTL1,
DA7280_OPERATION_MODE_MASK, 0);
if (error)
dev_err(dev, "failed to clear op mode on fault: %d\n",
error);
}
if (events[0] & DA7280_E_SEQ_DONE_MASK)
haptics->active = false;
if (events[0] & DA7280_E_WARNING_MASK) {
if (events[1] & DA7280_E_LIM_DRIVE_MASK ||
events[1] & DA7280_E_LIM_DRIVE_ACC_MASK)
dev_warn(dev, "Please reduce the driver level\n");
if (events[1] & DA7280_E_MEM_TYPE_MASK)
dev_warn(dev, "Please check the mem data format\n");
if (events[1] & DA7280_E_OVERTEMP_WARN_MASK)
dev_warn(dev, "Over-temperature warning\n");
}
if (events[0] & DA7280_E_SEQ_FAULT_MASK) {
if (events[2] & DA7280_E_SEQ_ID_FAULT_MASK)
dev_info(dev, "Please reload PS_SEQ_ID & mem data\n");
if (events[2] & DA7280_E_MEM_FAULT_MASK)
dev_info(dev, "Please reload the mem data\n");
if (events[2] & DA7280_E_PWM_FAULT_MASK)
dev_info(dev, "Please restart PWM interface\n");
}
out:
return IRQ_HANDLED;
}
static int da7280_init(struct da7280_haptic *haptics)
{
unsigned int val = 0;
u32 v2i_factor;
int error, i;
u8 mask = 0;
/*
* If device type is DA7280_DEV_MAX then simply use currently
* programmed mode.
*/
if (haptics->dev_type == DA7280_DEV_MAX) {
error = regmap_read(haptics->regmap, DA7280_TOP_CFG1, &val);
if (error)
goto out_err;
haptics->dev_type = val & DA7280_ACTUATOR_TYPE_MASK ?
DA7280_ERM_COIN : DA7280_LRA;
}
/* Apply user settings */
if (haptics->dev_type == DA7280_LRA &&
haptics->resonant_freq_l != DA7280_SKIP_INIT) {
error = regmap_write(haptics->regmap, DA7280_FRQ_LRA_PER_H,
haptics->resonant_freq_h);
if (error)
goto out_err;
error = regmap_write(haptics->regmap, DA7280_FRQ_LRA_PER_L,
haptics->resonant_freq_l);
if (error)
goto out_err;
} else if (haptics->dev_type == DA7280_ERM_COIN) {
error = regmap_update_bits(haptics->regmap, DA7280_TOP_INT_CFG1,
DA7280_BEMF_FAULT_LIM_MASK, 0);
if (error)
goto out_err;
mask = DA7280_TST_CALIB_IMPEDANCE_DIS_MASK |
DA7280_V2I_FACTOR_FREEZE_MASK;
val = DA7280_TST_CALIB_IMPEDANCE_DIS_MASK |
DA7280_V2I_FACTOR_FREEZE_MASK;
error = regmap_update_bits(haptics->regmap, DA7280_TOP_CFG4,
mask, val);
if (error)
goto out_err;
haptics->acc_en = false;
haptics->rapid_stop_en = false;
haptics->amp_pid_en = false;
}
mask = DA7280_ACTUATOR_TYPE_MASK |
DA7280_BEMF_SENSE_EN_MASK |
DA7280_FREQ_TRACK_EN_MASK |
DA7280_ACCELERATION_EN_MASK |
DA7280_RAPID_STOP_EN_MASK |
DA7280_AMP_PID_EN_MASK;
val = FIELD_PREP(DA7280_ACTUATOR_TYPE_MASK,
(haptics->dev_type ? 1 : 0)) |
FIELD_PREP(DA7280_BEMF_SENSE_EN_MASK,
(haptics->bemf_sense_en ? 1 : 0)) |
FIELD_PREP(DA7280_FREQ_TRACK_EN_MASK,
(haptics->freq_track_en ? 1 : 0)) |
FIELD_PREP(DA7280_ACCELERATION_EN_MASK,
(haptics->acc_en ? 1 : 0)) |
FIELD_PREP(DA7280_RAPID_STOP_EN_MASK,
(haptics->rapid_stop_en ? 1 : 0)) |
FIELD_PREP(DA7280_AMP_PID_EN_MASK,
(haptics->amp_pid_en ? 1 : 0));
error = regmap_update_bits(haptics->regmap, DA7280_TOP_CFG1, mask, val);
if (error)
goto out_err;
error = regmap_update_bits(haptics->regmap, DA7280_TOP_CFG5,
DA7280_V2I_FACTOR_OFFSET_EN_MASK,
haptics->acc_en ?
DA7280_V2I_FACTOR_OFFSET_EN_MASK : 0);
if (error)
goto out_err;
error = regmap_update_bits(haptics->regmap,
DA7280_TOP_CFG2,
DA7280_MEM_DATA_SIGNED_MASK,
haptics->acc_en ?
0 : DA7280_MEM_DATA_SIGNED_MASK);
if (error)
goto out_err;
if (haptics->nommax != DA7280_SKIP_INIT) {
error = regmap_write(haptics->regmap, DA7280_ACTUATOR1,
haptics->nommax);
if (error)
goto out_err;
}
if (haptics->absmax != DA7280_SKIP_INIT) {
error = regmap_write(haptics->regmap, DA7280_ACTUATOR2,
haptics->absmax);
if (error)
goto out_err;
}
error = regmap_update_bits(haptics->regmap, DA7280_ACTUATOR3,
DA7280_IMAX_MASK, haptics->imax);
if (error)
goto out_err;
v2i_factor = haptics->impd * (haptics->imax + 4) / 1610400;
error = regmap_write(haptics->regmap, DA7280_CALIB_V2I_L,
v2i_factor & 0xff);
if (error)
goto out_err;
error = regmap_write(haptics->regmap, DA7280_CALIB_V2I_H,
v2i_factor >> 8);
if (error)
goto out_err;
error = regmap_update_bits(haptics->regmap,
DA7280_TOP_CTL1,
DA7280_STANDBY_EN_MASK,
DA7280_STANDBY_EN_MASK);
if (error)
goto out_err;
if (haptics->mem_update) {
error = da7280_haptic_mem_update(haptics);
if (error)
goto out_err;
}
/* Set PS_SEQ_ID and PS_SEQ_LOOP */
val = FIELD_PREP(DA7280_PS_SEQ_ID_MASK, haptics->ps_seq_id) |
FIELD_PREP(DA7280_PS_SEQ_LOOP_MASK, haptics->ps_seq_loop);
error = regmap_write(haptics->regmap, DA7280_SEQ_CTL2, val);
if (error)
goto out_err;
/* GPI(N) CTL */
for (i = 0; i < 3; i++) {
val = FIELD_PREP(DA7280_GPI0_SEQUENCE_ID_MASK,
haptics->gpi_ctl[i].seq_id) |
FIELD_PREP(DA7280_GPI0_MODE_MASK,
haptics->gpi_ctl[i].mode) |
FIELD_PREP(DA7280_GPI0_POLARITY_MASK,
haptics->gpi_ctl[i].polarity);
error = regmap_write(haptics->regmap,
DA7280_GPI_0_CTL + i, val);
if (error)
goto out_err;
}
/* Mask ADC_SAT_M bit as default */
error = regmap_update_bits(haptics->regmap,
DA7280_IRQ_MASK2,
DA7280_ADC_SAT_M_MASK,
DA7280_ADC_SAT_M_MASK);
if (error)
goto out_err;
/* Clear Interrupts */
error = regmap_write(haptics->regmap, DA7280_IRQ_EVENT1, 0xff);
if (error)
goto out_err;
error = regmap_update_bits(haptics->regmap,
DA7280_IRQ_MASK1,
DA7280_SEQ_FAULT_M_MASK |
DA7280_SEQ_DONE_M_MASK,
0);
if (error)
goto out_err;
haptics->active = false;
return 0;
out_err:
dev_err(haptics->dev, "chip initialization error: %d\n", error);
return error;
}
static int da7280_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
struct da7280_haptic *haptics;
struct input_dev *input_dev;
struct pwm_state state;
struct ff_device *ff;
int error;
if (!client->irq) {
dev_err(dev, "No IRQ configured\n");
return -EINVAL;
}
haptics = devm_kzalloc(dev, sizeof(*haptics), GFP_KERNEL);
if (!haptics)
return -ENOMEM;
haptics->dev = dev;
da7280_parse_properties(dev, haptics);
if (haptics->const_op_mode == DA7280_PWM_MODE) {
haptics->pwm_dev = devm_pwm_get(dev, NULL);
error = PTR_ERR_OR_ZERO(haptics->pwm_dev);
if (error) {
if (error != -EPROBE_DEFER)
dev_err(dev, "Unable to request PWM: %d\n",
error);
return error;
}
/* Sync up PWM state and ensure it is off. */
pwm_init_state(haptics->pwm_dev, &state);
state.enabled = false;
error = pwm_apply_state(haptics->pwm_dev, &state);
if (error) {
dev_err(dev, "Failed to apply PWM state: %d\n", error);
return error;
}
/*
* Check PWM period, PWM freq = 1000000 / state.period.
* The valid PWM freq range: 10k ~ 250kHz.
*/
if (state.period > 100000 || state.period < 4000) {
dev_err(dev, "Unsupported PWM period: %lld\n",
state.period);
return -EINVAL;
}
}
INIT_WORK(&haptics->work, da7280_haptic_work);
haptics->client = client;
i2c_set_clientdata(client, haptics);
haptics->regmap = devm_regmap_init_i2c(client,
&da7280_haptic_regmap_config);
error = PTR_ERR_OR_ZERO(haptics->regmap);
if (error) {
dev_err(dev, "Failed to allocate register map: %d\n", error);
return error;
}
error = da7280_init(haptics);
if (error) {
dev_err(dev, "Failed to initialize device: %d\n", error);
return error;
}
/* Initialize input device for haptic device */
input_dev = devm_input_allocate_device(dev);
if (!input_dev) {
dev_err(dev, "Failed to allocate input device\n");
return -ENOMEM;
}
input_dev->name = "da7280-haptic";
input_dev->dev.parent = client->dev.parent;
input_dev->open = da7280_haptic_open;
input_dev->close = da7280_haptic_close;
input_set_drvdata(input_dev, haptics);
haptics->input_dev = input_dev;
input_set_capability(haptics->input_dev, EV_FF, FF_PERIODIC);
input_set_capability(haptics->input_dev, EV_FF, FF_CUSTOM);
input_set_capability(haptics->input_dev, EV_FF, FF_CONSTANT);
input_set_capability(haptics->input_dev, EV_FF, FF_GAIN);
error = input_ff_create(haptics->input_dev,
DA7280_FF_EFFECT_COUNT_MAX);
if (error) {
dev_err(dev, "Failed to create FF input device: %d\n", error);
return error;
}
ff = input_dev->ff;
ff->upload = da7280_haptics_upload_effect;
ff->playback = da7280_haptics_playback;
error = input_register_device(input_dev);
if (error) {
dev_err(dev, "Failed to register input device: %d\n", error);
return error;
}
error = devm_request_threaded_irq(dev, client->irq,
NULL, da7280_irq_handler,
IRQF_ONESHOT,
"da7280-haptics", haptics);
if (error) {
dev_err(dev, "Failed to request IRQ %d: %d\n",
client->irq, error);
return error;
}
return 0;
}
static int __maybe_unused da7280_suspend(struct device *dev)
{
struct da7280_haptic *haptics = dev_get_drvdata(dev);
mutex_lock(&haptics->input_dev->mutex);
/*
* Make sure no new requests will be submitted while device is
* suspended.
*/
spin_lock_irq(&haptics->input_dev->event_lock);
haptics->suspended = true;
spin_unlock_irq(&haptics->input_dev->event_lock);
da7280_haptic_stop(haptics);
mutex_unlock(&haptics->input_dev->mutex);
return 0;
}
static int __maybe_unused da7280_resume(struct device *dev)
{
struct da7280_haptic *haptics = dev_get_drvdata(dev);
int retval;
mutex_lock(&haptics->input_dev->mutex);
retval = da7280_haptic_start(haptics);
if (!retval) {
spin_lock_irq(&haptics->input_dev->event_lock);
haptics->suspended = false;
spin_unlock_irq(&haptics->input_dev->event_lock);
}
mutex_unlock(&haptics->input_dev->mutex);
return retval;
}
#ifdef CONFIG_OF
static const struct of_device_id da7280_of_match[] = {
{ .compatible = "dlg,da7280", },
{ }
};
MODULE_DEVICE_TABLE(of, da7280_of_match);
#endif
static const struct i2c_device_id da7280_i2c_id[] = {
{ "da7280", },
{ }
};
MODULE_DEVICE_TABLE(i2c, da7280_i2c_id);
static SIMPLE_DEV_PM_OPS(da7280_pm_ops, da7280_suspend, da7280_resume);
static struct i2c_driver da7280_driver = {
.driver = {
.name = "da7280",
.of_match_table = of_match_ptr(da7280_of_match),
.pm = &da7280_pm_ops,
},
.probe = da7280_probe,
.id_table = da7280_i2c_id,
};
module_i2c_driver(da7280_driver);
MODULE_DESCRIPTION("DA7280 haptics driver");
MODULE_AUTHOR("Roy Im <Roy.Im.Opensource@diasemi.com>");
MODULE_LICENSE("GPL");