diff options
Diffstat (limited to 'drivers/input/misc/da7280.c')
| -rw-r--r-- | drivers/input/misc/da7280.c | 1332 |
1 files changed, 1332 insertions, 0 deletions
diff --git a/drivers/input/misc/da7280.c b/drivers/input/misc/da7280.c new file mode 100644 index 000000000..b08610d6e --- /dev/null +++ b/drivers/input/misc/da7280.c @@ -0,0 +1,1332 @@ +// 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"); |