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qti-haptics.c
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qti-haptics.c
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/* Copyright (c) 2018-2019, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* 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.
*/
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/fs.h>
#include <linux/hrtimer.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/platform_device.h>
#include <linux/pwm.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/uaccess.h>
enum actutor_type {
ACT_LRA,
ACT_ERM,
};
enum lra_res_sig_shape {
RES_SIG_SINE,
RES_SIG_SQUARE,
};
enum lra_auto_res_mode {
AUTO_RES_MODE_ZXD,
AUTO_RES_MODE_QWD,
};
enum wf_src {
INT_WF_VMAX,
INT_WF_BUFFER,
EXT_WF_AUDIO,
EXT_WF_PWM,
};
enum haptics_custom_effect_param {
CUSTOM_DATA_EFFECT_IDX,
CUSTOM_DATA_TIMEOUT_SEC_IDX,
CUSTOM_DATA_TIMEOUT_MSEC_IDX,
CUSTOM_DATA_LEN,
};
/* common definitions */
#define HAP_BRAKE_PATTERN_MAX 4
#define HAP_WAVEFORM_BUFFER_MAX 8
#define HAP_VMAX_MV_DEFAULT 1800
#define HAP_VMAX_MV_MAX 3596
#define HAP_PLAY_RATE_US_DEFAULT 5715
#define HAP_PLAY_RATE_US_MAX 20475
#define HAP_PLAY_RATE_US_LSB 5
#define VMAX_MIN_PLAY_TIME_US 20000
#define HAP_SC_DET_MAX_COUNT 5
#define HAP_SC_DET_TIME_US 1000000
#define FF_EFFECT_COUNT_MAX 32
#define HAP_DISABLE_DELAY_USEC 1000
/* haptics module register definitions */
#define REG_HAP_STATUS1 0x0A
#define HAP_SC_DET_BIT BIT(3)
#define HAP_BUSY_BIT BIT(1)
#define REG_HAP_EN_CTL1 0x46
#define HAP_EN_BIT BIT(7)
#define REG_HAP_EN_CTL2 0x48
#define HAP_AUTO_STANDBY_EN_BIT BIT(1)
#define HAP_BRAKE_EN_BIT BIT(0)
#define REG_HAP_EN_CTL3 0x4A
#define HAP_HBRIDGE_EN_BIT BIT(7)
#define HAP_PWM_SIGNAL_EN_BIT BIT(6)
#define HAP_ILIM_EN_BIT BIT(5)
#define HAP_ILIM_CC_EN_BIT BIT(4)
#define HAP_AUTO_RES_RBIAS_EN_BIT BIT(3)
#define HAP_DAC_EN_BIT BIT(2)
#define HAP_ZX_HYST_EN_BIT BIT(1)
#define HAP_PWM_CTL_EN_BIT BIT(0)
#define REG_HAP_AUTO_RES_CTRL 0x4B
#define HAP_AUTO_RES_EN_BIT BIT(7)
#define HAP_SEL_AUTO_RES_PERIOD BIT(6)
#define HAP_AUTO_RES_CNT_ERR_DELTA_MASK GENMASK(5, 4)
#define HAP_AUTO_RES_CNT_ERR_DELTA_SHIFT 4
#define HAP_AUTO_RES_ERR_RECOVERY_BIT BIT(3)
#define HAP_AUTO_RES_EN_DLY_MASK GENMASK(2, 0)
#define AUTO_RES_CNT_ERR_DELTA(x) (x << HAP_AUTO_RES_CNT_ERR_DELTA_SHIFT)
#define AUTO_RES_EN_DLY(x) x
#define REG_HAP_CFG1 0x4C
#define REG_HAP_CFG2 0x4D
#define HAP_LRA_RES_TYPE_BIT BIT(0)
#define REG_HAP_SEL 0x4E
#define HAP_WF_SOURCE_MASK GENMASK(5, 4)
#define HAP_WF_SOURCE_SHIFT 4
#define HAP_WF_TRIGGER_BIT BIT(0)
#define HAP_WF_SOURCE_VMAX (0 << HAP_WF_SOURCE_SHIFT)
#define HAP_WF_SOURCE_BUFFER (1 << HAP_WF_SOURCE_SHIFT)
#define HAP_WF_SOURCE_AUDIO (2 << HAP_WF_SOURCE_SHIFT)
#define HAP_WF_SOURCE_PWM (3 << HAP_WF_SOURCE_SHIFT)
#define REG_HAP_AUTO_RES_CFG 0x4F
#define HAP_AUTO_RES_MODE_BIT BIT(7)
#define HAP_AUTO_RES_MODE_SHIFT 7
#define HAP_AUTO_RES_CAL_DURATON_MASK GENMASK(6, 5)
#define HAP_CAL_EOP_EN_BIT BIT(3)
#define HAP_CAL_PERIOD_MASK GENMASK(2, 0)
#define HAP_CAL_OPT3_EVERY_8_PERIOD 2
#define REG_HAP_SLEW_CFG 0x50
#define REG_HAP_VMAX_CFG 0x51
#define HAP_VMAX_SIGN_BIT BIT(7)
#define HAP_VMAX_OVD_BIT BIT(6)
#define HAP_VMAX_MV_MASK GENMASK(5, 1)
#define HAP_VMAX_MV_SHIFT 1
#define HAP_VMAX_MV_LSB 116
#define REG_HAP_ILIM_CFG 0x52
#define HAP_ILIM_SEL_1000MA BIT(1)
#define HAP_ILIM_DEFAULT_SEL HAP_ILIM_SEL_1000MA
#define REG_HAP_SC_DEB_CFG 0x53
#define REG_HAP_RATE_CFG1 0x54
#define REG_HAP_RATE_CFG2 0x55
#define REG_HAP_INTERNAL_PWM 0x56
#define REG_HAP_EXTERNAL_PWM 0x57
#define REG_HAP_PWM 0x58
#define REG_HAP_SC_CLR 0x59
#define HAP_SC_CLR_BIT BIT(0)
#define REG_HAP_ZX_CFG 0x5A
#define HAP_ZX_DET_DEB_MASK GENMASK(2, 0)
#define ZX_DET_DEB_10US 0
#define ZX_DET_DEB_20US 1
#define ZX_DET_DEB_40US 2
#define ZX_DET_DEB_80US 3
#define REG_HAP_BRAKE 0x5C
#define HAP_BRAKE_PATTERN_MASK 0x3
#define HAP_BRAKE_PATTERN_SHIFT 2
#define REG_HAP_WF_REPEAT 0x5E
#define HAP_WF_REPEAT_MASK GENMASK(6, 4)
#define HAP_WF_REPEAT_SHIFT 4
#define HAP_WF_S_REPEAT_MASK GENMASK(1, 0)
#define REG_HAP_WF_S1 0x60
#define HAP_WF_SIGN_BIT BIT(7)
#define HAP_WF_OVD_BIT BIT(6)
#define HAP_WF_AMP_BIT GENMASK(5, 1)
#define HAP_WF_AMP_SHIFT 1
#define REG_HAP_PLAY 0x70
#define HAP_PLAY_BIT BIT(7)
#define REG_HAP_SEC_ACCESS 0xD0
struct qti_hap_effect {
int id;
u8 *pattern;
int pattern_length;
u16 play_rate_us;
u16 vmax_mv;
u8 wf_repeat_n;
u8 wf_s_repeat_n;
u8 brake[HAP_BRAKE_PATTERN_MAX];
int brake_pattern_length;
bool brake_en;
bool lra_auto_res_disable;
};
struct qti_hap_play_info {
struct qti_hap_effect *effect;
u16 vmax_mv;
int length_us;
int playing_pos;
bool playing_pattern;
};
struct qti_hap_config {
enum actutor_type act_type;
enum lra_res_sig_shape lra_shape;
enum lra_auto_res_mode lra_auto_res_mode;
enum wf_src ext_src;
u16 vmax_mv;
u16 play_rate_us;
bool lra_allow_variable_play_rate;
bool use_ext_wf_src;
};
struct qti_hap_chip {
struct platform_device *pdev;
struct device *dev;
struct regmap *regmap;
struct input_dev *input_dev;
struct pwm_device *pwm_dev;
struct qti_hap_config config;
struct qti_hap_play_info play;
struct qti_hap_effect *predefined;
struct qti_hap_effect constant;
struct regulator *vdd_supply;
struct hrtimer stop_timer;
struct hrtimer hap_disable_timer;
struct dentry *hap_debugfs;
spinlock_t bus_lock;
ktime_t last_sc_time;
int play_irq;
int sc_irq;
int effects_count;
int sc_det_count;
u16 reg_base;
bool perm_disable;
bool play_irq_en;
bool vdd_enabled;
};
static int wf_repeat[8] = {1, 2, 4, 8, 16, 32, 64, 128};
static int wf_s_repeat[4] = {1, 2, 4, 8};
static inline bool is_secure(u8 addr)
{
return ((addr & 0xFF) > 0xD0);
}
static int qti_haptics_read(struct qti_hap_chip *chip,
u8 addr, u8 *val, int len)
{
int rc = 0;
unsigned long flags;
spin_lock_irqsave(&chip->bus_lock, flags);
rc = regmap_bulk_read(chip->regmap, chip->reg_base + addr, val, len);
if (rc < 0)
dev_err(chip->dev, "Reading addr 0x%x failed, rc=%d\n",
addr, rc);
spin_unlock_irqrestore(&chip->bus_lock, flags);
return rc;
}
static int qti_haptics_write(struct qti_hap_chip *chip,
u8 addr, u8 *val, int len)
{
int rc = 0, i;
unsigned long flags;
spin_lock_irqsave(&chip->bus_lock, flags);
if (is_secure(addr)) {
for (i = 0; i < len; i++) {
rc = regmap_write(chip->regmap,
chip->reg_base + REG_HAP_SEC_ACCESS,
0xA5);
if (rc < 0) {
dev_err(chip->dev, "write SEC_ACCESS failed, rc=%d\n",
rc);
goto unlock;
}
rc = regmap_write(chip->regmap,
chip->reg_base + addr + i, val[i]);
if (rc < 0) {
dev_err(chip->dev, "write val 0x%x to addr 0x%x failed, rc=%d\n",
val[i], addr + i, rc);
goto unlock;
}
}
} else {
if (len > 1)
rc = regmap_bulk_write(chip->regmap,
chip->reg_base + addr, val, len);
else
rc = regmap_write(chip->regmap,
chip->reg_base + addr, *val);
if (rc < 0)
dev_err(chip->dev, "write addr 0x%x failed, rc=%d\n",
addr, rc);
}
for (i = 0; i < len; i++)
dev_dbg(chip->dev, "Update addr 0x%x to val 0x%x\n",
addr + i, val[i]);
unlock:
spin_unlock_irqrestore(&chip->bus_lock, flags);
return rc;
}
static int qti_haptics_masked_write(struct qti_hap_chip *chip, u8 addr,
u8 mask, u8 val)
{
int rc;
unsigned long flags;
spin_lock_irqsave(&chip->bus_lock, flags);
if (is_secure(addr)) {
rc = regmap_write(chip->regmap,
chip->reg_base + REG_HAP_SEC_ACCESS,
0xA5);
if (rc < 0) {
dev_err(chip->dev, "write SEC_ACCESS failed, rc=%d\n",
rc);
goto unlock;
}
}
rc = regmap_update_bits(chip->regmap, chip->reg_base + addr, mask, val);
if (rc < 0)
dev_err(chip->dev, "Update addr 0x%x to val 0x%x with mask 0x%x failed, rc=%d\n",
addr, val, mask, rc);
dev_dbg(chip->dev, "Update addr 0x%x to val 0x%x with mask 0x%x\n",
addr, val, mask);
unlock:
spin_unlock_irqrestore(&chip->bus_lock, flags);
return rc;
}
static void construct_constant_waveform_in_pattern(
struct qti_hap_play_info *play)
{
struct qti_hap_chip *chip = container_of(play,
struct qti_hap_chip, play);
struct qti_hap_config *config = &chip->config;
struct qti_hap_effect *effect = play->effect;
int total_samples, samples, left, magnitude, i, j, k;
int delta = INT_MAX, delta_min = INT_MAX;
/* Using play_rate_us in config for constant waveform */
effect->play_rate_us = config->play_rate_us;
total_samples = play->length_us / effect->play_rate_us;
left = play->length_us % effect->play_rate_us;
if (total_samples <= HAP_WAVEFORM_BUFFER_MAX) {
effect->pattern_length = total_samples;
effect->wf_s_repeat_n = 0;
effect->wf_repeat_n = 0;
} else {
/*
* Find a closest setting to achieve the constant waveform
* with the required length by using buffer waveform source:
* play_length_us = pattern_length * wf_s_repeat_n
* * wf_repeat_n * play_rate_us
*/
for (i = 0; i < ARRAY_SIZE(wf_repeat); i++) {
for (j = 0; j < ARRAY_SIZE(wf_s_repeat); j++) {
for (k = 1; k <= HAP_WAVEFORM_BUFFER_MAX; k++) {
samples = k * wf_s_repeat[j] *
wf_repeat[i];
delta = abs(total_samples - samples);
if (delta < delta_min) {
delta_min = delta;
effect->pattern_length = k;
effect->wf_s_repeat_n = j;
effect->wf_repeat_n = i;
}
if (samples > total_samples)
break;
}
}
}
}
if (left > 0 && effect->pattern_length < HAP_WAVEFORM_BUFFER_MAX)
effect->pattern_length++;
play->length_us = effect->pattern_length * effect->play_rate_us;
dev_dbg(chip->dev, "total_samples = %d, pattern_length = %d, wf_s_repeat = %d, wf_repeat = %d\n",
total_samples, effect->pattern_length,
wf_s_repeat[effect->wf_s_repeat_n],
wf_repeat[effect->wf_repeat_n]);
for (i = 0; i < effect->pattern_length; i++) {
magnitude = play->vmax_mv / HAP_VMAX_MV_LSB;
effect->pattern[i] = (u8)magnitude << HAP_WF_AMP_SHIFT;
}
}
static int qti_haptics_config_wf_buffer(struct qti_hap_chip *chip)
{
struct qti_hap_play_info *play = &chip->play;
struct qti_hap_effect *effect = play->effect;
u8 addr, pattern[HAP_WAVEFORM_BUFFER_MAX] = {0};
int rc = 0;
size_t len;
if (play->playing_pos == effect->pattern_length) {
dev_dbg(chip->dev, "pattern playing done\n");
return 0;
}
if (effect->pattern_length - play->playing_pos
>= HAP_WAVEFORM_BUFFER_MAX)
len = HAP_WAVEFORM_BUFFER_MAX;
else
len = effect->pattern_length - play->playing_pos;
dev_dbg(chip->dev, "copy %d bytes start from %d\n",
(int)len, play->playing_pos);
memcpy(pattern, &effect->pattern[play->playing_pos], len);
play->playing_pos += len;
addr = REG_HAP_WF_S1;
rc = qti_haptics_write(chip, REG_HAP_WF_S1, pattern,
HAP_WAVEFORM_BUFFER_MAX);
if (rc < 0)
dev_err(chip->dev, "Program WF_SAMPLE failed, rc=%d\n", rc);
return rc;
}
static int qti_haptics_config_wf_repeat(struct qti_hap_chip *chip)
{
struct qti_hap_effect *effect = chip->play.effect;
u8 addr, mask, val;
int rc = 0;
addr = REG_HAP_WF_REPEAT;
mask = HAP_WF_REPEAT_MASK | HAP_WF_S_REPEAT_MASK;
val = effect->wf_repeat_n << HAP_WF_REPEAT_SHIFT;
val |= effect->wf_s_repeat_n;
rc = qti_haptics_masked_write(chip, addr, mask, val);
if (rc < 0)
dev_err(chip->dev, "Program WF_REPEAT failed, rc=%d\n", rc);
return rc;
}
static int qti_haptics_play(struct qti_hap_chip *chip, bool play)
{
int rc = 0;
u8 val = play ? HAP_PLAY_BIT : 0;
rc = qti_haptics_write(chip,
REG_HAP_PLAY, &val, 1);
if (rc < 0)
dev_err(chip->dev, "%s playing haptics failed, rc=%d\n",
play ? "start" : "stop", rc);
return rc;
}
static int qti_haptics_module_en(struct qti_hap_chip *chip, bool en)
{
int rc = 0;
u8 val = en ? HAP_EN_BIT : 0;
rc = qti_haptics_write(chip,
REG_HAP_EN_CTL1, &val, 1);
if (rc < 0)
dev_err(chip->dev, "%s haptics failed, rc=%d\n",
en ? "enable" : "disable", rc);
return rc;
}
static int qti_haptics_config_vmax(struct qti_hap_chip *chip, int vmax_mv)
{
u8 addr, mask, val;
int rc;
addr = REG_HAP_VMAX_CFG;
mask = HAP_VMAX_MV_MASK;
val = (vmax_mv / HAP_VMAX_MV_LSB) << HAP_VMAX_MV_SHIFT;
rc = qti_haptics_masked_write(chip, addr, mask, val);
if (rc < 0)
dev_err(chip->dev, "write VMAX_CFG failed, rc=%d\n",
rc);
return rc;
}
static int qti_haptics_config_wf_src(struct qti_hap_chip *chip,
enum wf_src src)
{
u8 addr, mask, val = 0;
int rc;
addr = REG_HAP_SEL;
mask = HAP_WF_SOURCE_MASK | HAP_WF_TRIGGER_BIT;
val = src << HAP_WF_SOURCE_SHIFT;
if (src == EXT_WF_AUDIO || src == EXT_WF_PWM)
val |= HAP_WF_TRIGGER_BIT;
rc = qti_haptics_masked_write(chip, addr, mask, val);
if (rc < 0)
dev_err(chip->dev, "set HAP_SEL failed, rc=%d\n", rc);
return rc;
}
static int qti_haptics_config_play_rate_us(struct qti_hap_chip *chip,
int play_rate_us)
{
u8 addr, val[2];
int tmp, rc;
addr = REG_HAP_RATE_CFG1;
tmp = play_rate_us / HAP_PLAY_RATE_US_LSB;
val[0] = tmp & 0xff;
val[1] = (tmp >> 8) & 0xf;
rc = qti_haptics_write(chip, addr, val, 2);
if (rc < 0)
dev_err(chip->dev, "write play_rate failed, rc=%d\n", rc);
return rc;
}
static int qti_haptics_brake_enable(struct qti_hap_chip *chip, bool en)
{
u8 addr, mask, val;
int rc;
addr = REG_HAP_EN_CTL2;
mask = HAP_BRAKE_EN_BIT;
val = en ? HAP_BRAKE_EN_BIT : 0;
rc = qti_haptics_masked_write(chip, addr, mask, val);
if (rc < 0)
dev_err(chip->dev, "write BRAKE_EN failed, rc=%d\n", rc);
return rc;
}
static int qti_haptics_config_brake(struct qti_hap_chip *chip, u8 *brake)
{
u8 addr, val;
int i, rc;
addr = REG_HAP_BRAKE;
for (val = 0, i = 0; i < HAP_BRAKE_PATTERN_MAX; i++)
val |= (brake[i] & HAP_BRAKE_PATTERN_MASK) <<
i * HAP_BRAKE_PATTERN_SHIFT;
rc = qti_haptics_write(chip, addr, &val, 1);
if (rc < 0) {
dev_err(chip->dev, "write brake pattern failed, rc=%d\n", rc);
return rc;
}
/*
* Set BRAKE_EN regardless of the brake pattern, this helps to stop
* playing immediately once the valid values in WF_Sx are played.
*/
rc = qti_haptics_brake_enable(chip, true);
return rc;
}
static int qti_haptics_lra_auto_res_enable(struct qti_hap_chip *chip, bool en)
{
int rc;
u8 addr, val, mask;
addr = REG_HAP_AUTO_RES_CTRL;
mask = HAP_AUTO_RES_EN_BIT;
val = en ? HAP_AUTO_RES_EN_BIT : 0;
rc = qti_haptics_masked_write(chip, addr, mask, val);
if (rc < 0)
dev_err(chip->dev, "set AUTO_RES_CTRL failed, rc=%d\n", rc);
return rc;
}
#define HAP_CLEAR_PLAYING_RATE_US 15
static int qti_haptics_clear_settings(struct qti_hap_chip *chip)
{
int rc;
u8 pattern[HAP_WAVEFORM_BUFFER_MAX] = {1, 0, 0, 0, 0, 0, 0, 0};
rc = qti_haptics_brake_enable(chip, false);
if (rc < 0)
return rc;
rc = qti_haptics_lra_auto_res_enable(chip, false);
if (rc < 0)
return rc;
rc = qti_haptics_config_play_rate_us(chip, HAP_CLEAR_PLAYING_RATE_US);
if (rc < 0)
return rc;
rc = qti_haptics_write(chip, REG_HAP_WF_S1, pattern,
HAP_WAVEFORM_BUFFER_MAX);
if (rc < 0)
return rc;
rc = qti_haptics_play(chip, true);
if (rc < 0)
return rc;
rc = qti_haptics_play(chip, false);
if (rc < 0)
return rc;
return 0;
}
static int qti_haptics_load_constant_waveform(struct qti_hap_chip *chip)
{
struct qti_hap_play_info *play = &chip->play;
struct qti_hap_config *config = &chip->config;
int rc = 0;
rc = qti_haptics_config_play_rate_us(chip, config->play_rate_us);
if (rc < 0)
return rc;
/*
* Using VMAX waveform source if playing length is >= 20ms,
* otherwise using buffer waveform source and calculate the
* pattern length and repeating times to achieve accurate
* playing time accuracy.
*/
if (play->length_us >= VMAX_MIN_PLAY_TIME_US) {
rc = qti_haptics_config_vmax(chip, play->vmax_mv);
if (rc < 0)
return rc;
/* Enable Auto-Resonance when VMAX wf-src is selected */
if (config->act_type == ACT_LRA) {
rc = qti_haptics_lra_auto_res_enable(chip, true);
if (rc < 0)
return rc;
}
/* Set WF_SOURCE to VMAX */
rc = qti_haptics_config_wf_src(chip, INT_WF_VMAX);
if (rc < 0)
return rc;
play->playing_pattern = false;
play->effect = NULL;
} else {
rc = qti_haptics_config_vmax(chip, config->vmax_mv);
if (rc < 0)
return rc;
play->effect = &chip->constant;
play->playing_pos = 0;
/* Format and config waveform in patterns */
construct_constant_waveform_in_pattern(play);
rc = qti_haptics_config_wf_buffer(chip);
if (rc < 0)
return rc;
rc = qti_haptics_config_wf_repeat(chip);
if (rc < 0)
return rc;
/* Set WF_SOURCE to buffer */
rc = qti_haptics_config_wf_src(chip, INT_WF_BUFFER);
if (rc < 0)
return rc;
play->playing_pattern = true;
}
return 0;
}
static int qti_haptics_load_predefined_effect(struct qti_hap_chip *chip,
int effect_idx)
{
struct qti_hap_play_info *play = &chip->play;
struct qti_hap_config *config = &chip->config;
int rc = 0;
if (effect_idx >= chip->effects_count)
return -EINVAL;
play->effect = &chip->predefined[effect_idx];
play->playing_pos = 0;
rc = qti_haptics_config_vmax(chip, play->vmax_mv);
if (rc < 0)
return rc;
rc = qti_haptics_config_play_rate_us(chip, play->effect->play_rate_us);
if (rc < 0)
return rc;
if (config->act_type == ACT_LRA) {
rc = qti_haptics_lra_auto_res_enable(chip,
!play->effect->lra_auto_res_disable);
if (rc < 0)
return rc;
}
/* Set brake pattern in the effect */
rc = qti_haptics_config_brake(chip, play->effect->brake);
if (rc < 0)
return rc;
rc = qti_haptics_config_wf_buffer(chip);
if (rc < 0)
return rc;
rc = qti_haptics_config_wf_repeat(chip);
if (rc < 0)
return rc;
/* Set WF_SOURCE to buffer */
rc = qti_haptics_config_wf_src(chip, INT_WF_BUFFER);
if (rc < 0)
return rc;
play->playing_pattern = true;
return 0;
}
static irqreturn_t qti_haptics_play_irq_handler(int irq, void *data)
{
struct qti_hap_chip *chip = (struct qti_hap_chip *)data;
struct qti_hap_play_info *play = &chip->play;
struct qti_hap_effect *effect = play->effect;
int rc;
dev_dbg(chip->dev, "play_irq triggered\n");
if (effect == NULL)
goto handled;
if (play->playing_pos == effect->pattern_length) {
dev_dbg(chip->dev, "waveform playing done\n");
if (chip->play_irq_en) {
disable_irq_nosync(chip->play_irq);
chip->play_irq_en = false;
}
/* Clear PLAY after all pattern bytes are queued */
qti_haptics_play(chip, false);
goto handled;
}
/* Config to play remaining patterns */
rc = qti_haptics_config_wf_repeat(chip);
if (rc < 0)
goto handled;
rc = qti_haptics_config_wf_buffer(chip);
if (rc < 0)
goto handled;
handled:
return IRQ_HANDLED;
}
static irqreturn_t qti_haptics_sc_irq_handler(int irq, void *data)
{
struct qti_hap_chip *chip = (struct qti_hap_chip *)data;
u8 addr, val;
ktime_t temp;
s64 sc_delta_time_us;
int rc;
dev_dbg(chip->dev, "sc_irq triggered\n");
addr = REG_HAP_STATUS1;
rc = qti_haptics_read(chip, addr, &val, 1);
if (rc < 0) {
dev_err(chip->dev, "read HAP_STATUS1 failed, rc=%d\n", rc);
goto handled;
}
if (!(val & HAP_SC_DET_BIT))
goto handled;
temp = ktime_get();
sc_delta_time_us = ktime_us_delta(temp, chip->last_sc_time);
chip->last_sc_time = temp;
if (sc_delta_time_us > HAP_SC_DET_TIME_US)
chip->sc_det_count = 0;
else
chip->sc_det_count++;
addr = REG_HAP_SC_CLR;
val = HAP_SC_CLR_BIT;
rc = qti_haptics_write(chip, addr, &val, 1);
if (rc < 0) {
dev_err(chip->dev, "write SC_CLR failed, rc=%d\n", rc);
goto handled;
}
if (chip->sc_det_count > HAP_SC_DET_MAX_COUNT) {
rc = qti_haptics_module_en(chip, false);
if (rc < 0)
goto handled;
dev_crit(chip->dev, "Short circuit persists, disable haptics\n");
chip->perm_disable = true;
}
handled:
return IRQ_HANDLED;
}
static inline void get_play_length(struct qti_hap_play_info *play,
int *length_us)
{
struct qti_hap_effect *effect = play->effect;
int tmp;
tmp = effect->pattern_length * effect->play_rate_us;
tmp *= wf_s_repeat[effect->wf_s_repeat_n];
tmp *= wf_repeat[effect->wf_repeat_n];
if (effect->brake_en)
tmp += effect->play_rate_us * effect->brake_pattern_length;
*length_us = tmp;
}
static int qti_haptics_upload_effect(struct input_dev *dev,
struct ff_effect *effect, struct ff_effect *old)
{
struct qti_hap_chip *chip = input_get_drvdata(dev);
struct qti_hap_config *config = &chip->config;
struct qti_hap_play_info *play = &chip->play;
int rc = 0, tmp, i;
s16 level, data[CUSTOM_DATA_LEN];
ktime_t rem;
s64 time_us;
if (hrtimer_active(&chip->hap_disable_timer)) {
rem = hrtimer_get_remaining(&chip->hap_disable_timer);
time_us = ktime_to_us(rem);
dev_dbg(chip->dev, "waiting for playing clear sequence: %lld us\n",
time_us);
usleep_range(time_us, time_us + 100);
}
switch (effect->type) {
case FF_CONSTANT:
play->length_us = effect->replay.length * USEC_PER_MSEC;
level = effect->u.constant.level;
tmp = level * config->vmax_mv;
play->vmax_mv = tmp / 0x7fff;
dev_dbg(chip->dev, "upload constant effect, length = %dus, vmax_mv=%d\n",
play->length_us, play->vmax_mv);
rc = qti_haptics_load_constant_waveform(chip);
if (rc < 0) {
dev_err(chip->dev, "Play constant waveform failed, rc=%d\n",
rc);
return rc;
}
break;
case FF_PERIODIC:
if (chip->effects_count == 0)
return -EINVAL;
if (effect->u.periodic.waveform != FF_CUSTOM) {
dev_err(chip->dev, "Only accept custom waveforms\n");
return -EINVAL;
}
if (copy_from_user(data, effect->u.periodic.custom_data,
sizeof(s16) * CUSTOM_DATA_LEN))
return -EFAULT;
for (i = 0; i < chip->effects_count; i++)
if (chip->predefined[i].id ==
data[CUSTOM_DATA_EFFECT_IDX])
break;
if (i == chip->effects_count) {
dev_err(chip->dev, "predefined effect %d is NOT supported\n",
data[0]);
return -EINVAL;
}
level = effect->u.periodic.magnitude;
tmp = level * chip->predefined[i].vmax_mv;
play->vmax_mv = tmp / 0x7fff;
dev_dbg(chip->dev, "upload effect %d, vmax_mv=%d\n",
chip->predefined[i].id, play->vmax_mv);
rc = qti_haptics_load_predefined_effect(chip, i);
if (rc < 0) {
dev_err(chip->dev, "Play predefined effect %d failed, rc=%d\n",
chip->predefined[i].id, rc);
return rc;
}
get_play_length(play, &play->length_us);
data[CUSTOM_DATA_TIMEOUT_SEC_IDX] =
play->length_us / USEC_PER_SEC;
data[CUSTOM_DATA_TIMEOUT_MSEC_IDX] =
(play->length_us % USEC_PER_SEC) / USEC_PER_MSEC;
/*
* Copy the custom data contains the play length back to
* userspace so that the userspace client can wait and
* send stop playing command after it's done.
*/
if (copy_to_user(effect->u.periodic.custom_data, data,
sizeof(s16) * CUSTOM_DATA_LEN))
return -EFAULT;
break;
default:
dev_err(chip->dev, "Unsupported effect type: %d\n",
effect->type);
return -EINVAL;
}
if (chip->vdd_supply && !chip->vdd_enabled) {
rc = regulator_enable(chip->vdd_supply);
if (rc < 0) {
dev_err(chip->dev, "Enable VDD supply failed, rc=%d\n",
rc);
return rc;
}
chip->vdd_enabled = true;
}
return 0;
}
static int qti_haptics_playback(struct input_dev *dev, int effect_id, int val)
{
struct qti_hap_chip *chip = input_get_drvdata(dev);
struct qti_hap_play_info *play = &chip->play;
s64 secs;
unsigned long nsecs;
int rc = 0;
dev_dbg(chip->dev, "playback, val = %d\n", val);
if (!!val) {
rc = qti_haptics_module_en(chip, true);
if (rc < 0)
return rc;
rc = qti_haptics_play(chip, true);
if (rc < 0)
return rc;
if (play->playing_pattern) {
if (!chip->play_irq_en) {
enable_irq(chip->play_irq);
chip->play_irq_en = true;
}
} else {
if (chip->play_irq_en) {
disable_irq_nosync(chip->play_irq);
chip->play_irq_en = false;
}
secs = play->length_us / USEC_PER_SEC;
nsecs = (play->length_us % USEC_PER_SEC) *
NSEC_PER_USEC;
hrtimer_start(&chip->stop_timer, ktime_set(secs, nsecs),
HRTIMER_MODE_REL);
}
} else {
play->length_us = 0;
rc = qti_haptics_play(chip, false);
if (rc < 0)
return rc;
if (chip->play_irq_en) {
disable_irq_nosync(chip->play_irq);
chip->play_irq_en = false;
}
}
return rc;
}
static int qti_haptics_erase(struct input_dev *dev, int effect_id)
{
struct qti_hap_chip *chip = input_get_drvdata(dev);
int delay_us, rc = 0;
if (chip->vdd_supply && chip->vdd_enabled) {
rc = regulator_disable(chip->vdd_supply);
if (rc < 0) {
dev_err(chip->dev, "Disable VDD supply failed, rc=%d\n",
rc);