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linux/drivers/input/misc/aw86927.c
Dan Carpenter d655a684c2 Input: aw86927 - fix error code in probe() 
Fix this copy and paste bug.  Return "err" instead of
PTR_ERR(haptics->regmap).

Fixes: 52e06d564c ("Input: aw86927 - add driver for Awinic AW86927")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/r/aNvMPTnOovdBitdP@stanley.mountain
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2025-09-30 13:19:53 -07:00

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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2025 Griffin Kroah-Hartman <griffin.kroah@fairphone.com>
*
* Partially based on vendor driver:
* Copyright (c) 2021 AWINIC Technology CO., LTD
*
*/
#include <linux/bitfield.h>
#include <linux/bits.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/types.h>
#define AW86927_RSTCFG_REG 0x00
#define AW86927_RSTCFG_SOFTRST 0xaa
#define AW86927_SYSINT_REG 0x02
#define AW86927_SYSINT_BST_SCPI BIT(7)
#define AW86927_SYSINT_BST_OVPI BIT(6)
#define AW86927_SYSINT_UVLI BIT(5)
#define AW86927_SYSINT_FF_AEI BIT(4)
#define AW86927_SYSINT_FF_AFI BIT(3)
#define AW86927_SYSINT_OCDI BIT(2)
#define AW86927_SYSINT_OTI BIT(1)
#define AW86927_SYSINT_DONEI BIT(0)
#define AW86927_SYSINTM_REG 0x03
#define AW86927_SYSINTM_BST_OVPM BIT(6)
#define AW86927_SYSINTM_FF_AEM BIT(4)
#define AW86927_SYSINTM_FF_AFM BIT(3)
#define AW86927_SYSINTM_DONEM BIT(0)
#define AW86927_PLAYCFG1_REG 0x06
#define AW86927_PLAYCFG1_BST_MODE_MASK GENMASK(7, 7)
#define AW86927_PLAYCFG1_BST_MODE_BYPASS 0
#define AW86927_PLAYCFG1_BST_VOUT_VREFSET_MASK GENMASK(6, 0)
#define AW86927_PLAYCFG1_BST_8500MV 0x50
#define AW86927_PLAYCFG2_REG 0x07
#define AW86927_PLAYCFG3_REG 0x08
#define AW86927_PLAYCFG3_AUTO_BST_MASK GENMASK(4, 4)
#define AW86927_PLAYCFG3_AUTO_BST_ENABLE 1
#define AW86927_PLAYCFG3_AUTO_BST_DISABLE 0
#define AW86927_PLAYCFG3_PLAY_MODE_MASK GENMASK(1, 0)
#define AW86927_PLAYCFG3_PLAY_MODE_RAM 0
#define AW86927_PLAYCFG4_REG 0x09
#define AW86927_PLAYCFG4_STOP BIT(1)
#define AW86927_PLAYCFG4_GO BIT(0)
#define AW86927_WAVCFG1_REG 0x0a
#define AW86927_WAVCFG1_WAVSEQ1_MASK GENMASK(6, 0)
#define AW86927_WAVCFG2_REG 0x0b
#define AW86927_WAVCFG2_WAVSEQ2_MASK GENMASK(6, 0)
#define AW86927_WAVCFG9_REG 0x12
#define AW86927_WAVCFG9_SEQ1LOOP_MASK GENMASK(7, 4)
#define AW86927_WAVCFG9_SEQ1LOOP_INFINITELY 0x0f
#define AW86927_CONTCFG1_REG 0x18
#define AW86927_CONTCFG1_BRK_BST_MD_MASK GENMASK(6, 6)
#define AW86927_CONTCFG5_REG 0x1c
#define AW86927_CONTCFG5_BST_BRK_GAIN_MASK GENMASK(7, 4)
#define AW86927_CONTCFG5_BRK_GAIN_MASK GENMASK(3, 0)
#define AW86927_CONTCFG10_REG 0x21
#define AW86927_CONTCFG10_BRK_TIME_MASK GENMASK(7, 0)
#define AW86927_CONTCFG10_BRK_TIME_DEFAULT 8
#define AW86927_CONTCFG13_REG 0x24
#define AW86927_CONTCFG13_TSET_MASK GENMASK(7, 4)
#define AW86927_CONTCFG13_BEME_SET_MASK GENMASK(3, 0)
#define AW86927_BASEADDRH_REG 0x2d
#define AW86927_BASEADDRL_REG 0x2e
#define AW86927_GLBRD5_REG 0x3f
#define AW86927_GLBRD5_STATE_MASK GENMASK(3, 0)
#define AW86927_GLBRD5_STATE_STANDBY 0
#define AW86927_RAMADDRH_REG 0x40
#define AW86927_RAMADDRL_REG 0x41
#define AW86927_RAMDATA_REG 0x42
#define AW86927_SYSCTRL3_REG 0x45
#define AW86927_SYSCTRL3_STANDBY_MASK GENMASK(5, 5)
#define AW86927_SYSCTRL3_STANDBY_ON 1
#define AW86927_SYSCTRL3_STANDBY_OFF 0
#define AW86927_SYSCTRL3_EN_RAMINIT_MASK GENMASK(2, 2)
#define AW86927_SYSCTRL3_EN_RAMINIT_ON 1
#define AW86927_SYSCTRL3_EN_RAMINIT_OFF 0
#define AW86927_SYSCTRL4_REG 0x46
#define AW86927_SYSCTRL4_WAVDAT_MODE_MASK GENMASK(6, 5)
#define AW86927_SYSCTRL4_WAVDAT_24K 0
#define AW86927_SYSCTRL4_INT_EDGE_MODE_MASK GENMASK(4, 4)
#define AW86927_SYSCTRL4_INT_EDGE_MODE_POS 0
#define AW86927_SYSCTRL4_INT_MODE_MASK GENMASK(3, 3)
#define AW86927_SYSCTRL4_INT_MODE_EDGE 1
#define AW86927_SYSCTRL4_GAIN_BYPASS_MASK GENMASK(0, 0)
#define AW86927_PWMCFG1_REG 0x48
#define AW86927_PWMCFG1_PRC_EN_MASK GENMASK(7, 7)
#define AW86927_PWMCFG1_PRC_DISABLE 0
#define AW86927_PWMCFG3_REG 0x4a
#define AW86927_PWMCFG3_PR_EN_MASK GENMASK(7, 7)
#define AW86927_PWMCFG3_PRCTIME_MASK GENMASK(6, 0)
#define AW86927_PWMCFG4_REG 0x4b
#define AW86927_PWMCFG4_PRTIME_MASK GENMASK(7, 0)
#define AW86927_VBATCTRL_REG 0x4c
#define AW86927_VBATCTRL_VBAT_MODE_MASK GENMASK(6, 6)
#define AW86927_VBATCTRL_VBAT_MODE_SW 0
#define AW86927_DETCFG1_REG 0x4d
#define AW86927_DETCFG1_DET_GO_MASK GENMASK(1, 0)
#define AW86927_DETCFG1_DET_GO_DET_SEQ0 1
#define AW86927_DETCFG1_DET_GO_NA 0
#define AW86927_DETCFG2_REG 0x4e
#define AW86927_DETCFG2_DET_SEQ0_MASK GENMASK(6, 3)
#define AW86927_DETCFG2_DET_SEQ0_VBAT 0
#define AW86927_DETCFG2_D2S_GAIN_MASK GENMASK(2, 0)
#define AW86927_DETCFG2_D2S_GAIN_10 4
#define AW86927_CHIPIDH_REG 0x57
#define AW86927_CHIPIDL_REG 0x58
#define AW86927_CHIPID 0x9270
#define AW86927_TMCFG_REG 0x5b
#define AW86927_TMCFG_UNLOCK 0x7d
#define AW86927_TMCFG_LOCK 0x00
#define AW86927_ANACFG11_REG 0x70
#define AW86927_ANACFG12_REG 0x71
#define AW86927_ANACFG12_BST_SKIP_MASK GENMASK(7, 7)
#define AW86927_ANACFG12_BST_SKIP_SHUTDOWN 1
#define AW86927_ANACFG13_REG 0x72
#define AW86927_ANACFG13_BST_PC_MASK GENMASK(7, 4)
#define AW86927_ANACFG13_BST_PEAKCUR_3P45A 6
#define AW86927_ANACFG15_REG 0x74
#define AW86927_ANACFG15_BST_PEAK_MODE_MASK GENMASK(7, 7)
#define AW86927_ANACFG15_BST_PEAK_BACK 1
#define AW86927_ANACFG16_REG 0x75
#define AW86927_ANACFG16_BST_SRC_MASK GENMASK(4, 4)
#define AW86927_ANACFG16_BST_SRC_3NS 0
/* default value of base addr */
#define AW86927_RAM_BASE_ADDR 0x800
#define AW86927_BASEADDRH_VAL 0x08
#define AW86927_BASEADDRL_VAL 0x00
enum aw86927_work_mode {
AW86927_STANDBY_MODE,
AW86927_RAM_MODE,
};
struct aw86927_data {
struct work_struct play_work;
struct device *dev;
struct input_dev *input_dev;
struct i2c_client *client;
struct regmap *regmap;
struct gpio_desc *reset_gpio;
bool running;
};
static const struct regmap_config aw86927_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.cache_type = REGCACHE_NONE,
.max_register = 0x80,
};
/*
* Sine wave representing the magnitude of the drive to be used.
* Data is encoded in two's complement.
* round(84 * sin(x / 16.25))
*/
static const u8 aw86927_waveform[] = {
0x00, 0x05, 0x0a, 0x0f, 0x14, 0x1a, 0x1f, 0x23, 0x28, 0x2d, 0x31, 0x35,
0x39, 0x3d, 0x41, 0x44, 0x47, 0x4a, 0x4c, 0x4f, 0x51, 0x52, 0x53, 0x54,
0x55, 0x55, 0x55, 0x55, 0x55, 0x54, 0x52, 0x51, 0x4f, 0x4d, 0x4a, 0x47,
0x44, 0x41, 0x3d, 0x3a, 0x36, 0x31, 0x2d, 0x28, 0x24, 0x1f, 0x1a, 0x15,
0x10, 0x0a, 0x05, 0x00, 0xfc, 0xf6, 0xf1, 0xec, 0xe7, 0xe2, 0xdd, 0xd8,
0xd4, 0xcf, 0xcb, 0xc7, 0xc3, 0xbf, 0xbc, 0xb9, 0xb6, 0xb4, 0xb1, 0xb0,
0xae, 0xad, 0xac, 0xab, 0xab, 0xab, 0xab, 0xab, 0xac, 0xae, 0xaf, 0xb1,
0xb3, 0xb6, 0xb8, 0xbc, 0xbf, 0xc2, 0xc6, 0xca, 0xce, 0xd3, 0xd7, 0xdc,
0xe1, 0xe6, 0xeb, 0xf0, 0xf5, 0xfb
};
struct aw86927_sram_waveform_header {
u8 version;
__be16 start_address;
__be16 end_address;
} __packed;
static const struct aw86927_sram_waveform_header sram_waveform_header = {
.version = 0x01,
.start_address = cpu_to_be16(AW86927_RAM_BASE_ADDR +
sizeof(struct aw86927_sram_waveform_header)),
.end_address = cpu_to_be16(AW86927_RAM_BASE_ADDR +
sizeof(struct aw86927_sram_waveform_header) +
ARRAY_SIZE(aw86927_waveform) - 1),
};
static int aw86927_wait_enter_standby(struct aw86927_data *haptics)
{
unsigned int reg_val;
int err;
err = regmap_read_poll_timeout(haptics->regmap, AW86927_GLBRD5_REG, reg_val,
(FIELD_GET(AW86927_GLBRD5_STATE_MASK, reg_val) ==
AW86927_GLBRD5_STATE_STANDBY),
2500, 2500 * 100);
if (err) {
dev_err(haptics->dev, "did not enter standby: %d\n", err);
return err;
}
return 0;
}
static int aw86927_play_mode(struct aw86927_data *haptics, u8 play_mode)
{
int err;
switch (play_mode) {
case AW86927_STANDBY_MODE:
/* Briefly toggle standby, then toggle back to standby off */
err = regmap_update_bits(haptics->regmap,
AW86927_SYSCTRL3_REG,
AW86927_SYSCTRL3_STANDBY_MASK,
FIELD_PREP(AW86927_SYSCTRL3_STANDBY_MASK,
AW86927_SYSCTRL3_STANDBY_ON));
if (err)
return err;
err = regmap_update_bits(haptics->regmap,
AW86927_SYSCTRL3_REG,
AW86927_SYSCTRL3_STANDBY_MASK,
FIELD_PREP(AW86927_SYSCTRL3_STANDBY_MASK,
AW86927_SYSCTRL3_STANDBY_OFF));
if (err)
return err;
break;
case AW86927_RAM_MODE:
err = regmap_update_bits(haptics->regmap,
AW86927_PLAYCFG3_REG,
AW86927_PLAYCFG3_PLAY_MODE_MASK,
FIELD_PREP(AW86927_PLAYCFG3_PLAY_MODE_MASK,
AW86927_PLAYCFG3_PLAY_MODE_RAM));
if (err)
return err;
err = regmap_update_bits(haptics->regmap,
AW86927_PLAYCFG1_REG,
AW86927_PLAYCFG1_BST_MODE_MASK,
FIELD_PREP(AW86927_PLAYCFG1_BST_MODE_MASK,
AW86927_PLAYCFG1_BST_MODE_BYPASS));
if (err)
return err;
err = regmap_update_bits(haptics->regmap,
AW86927_VBATCTRL_REG,
AW86927_VBATCTRL_VBAT_MODE_MASK,
FIELD_PREP(AW86927_VBATCTRL_VBAT_MODE_MASK,
AW86927_VBATCTRL_VBAT_MODE_SW));
if (err)
return err;
break;
}
return 0;
}
static int aw86927_stop(struct aw86927_data *haptics)
{
int err;
err = regmap_write(haptics->regmap, AW86927_PLAYCFG4_REG, AW86927_PLAYCFG4_STOP);
if (err) {
dev_err(haptics->dev, "Failed to stop playback: %d\n", err);
return err;
}
err = aw86927_wait_enter_standby(haptics);
if (err) {
dev_err(haptics->dev, "Failed to enter standby, trying to force it\n");
err = aw86927_play_mode(haptics, AW86927_STANDBY_MODE);
if (err)
return err;
}
return 0;
}
static int aw86927_haptics_play(struct input_dev *dev, void *data, struct ff_effect *effect)
{
struct aw86927_data *haptics = input_get_drvdata(dev);
int level;
level = effect->u.rumble.strong_magnitude;
if (!level)
level = effect->u.rumble.weak_magnitude;
/* If already running, don't restart playback */
if (haptics->running && level)
return 0;
haptics->running = level;
schedule_work(&haptics->play_work);
return 0;
}
static int aw86927_play_sine(struct aw86927_data *haptics)
{
int err;
err = aw86927_stop(haptics);
if (err)
return err;
err = aw86927_play_mode(haptics, AW86927_RAM_MODE);
if (err)
return err;
err = regmap_update_bits(haptics->regmap, AW86927_PLAYCFG3_REG,
AW86927_PLAYCFG3_AUTO_BST_MASK,
FIELD_PREP(AW86927_PLAYCFG3_AUTO_BST_MASK,
AW86927_PLAYCFG3_AUTO_BST_ENABLE));
if (err)
return err;
/* Set waveseq 1 to the first wave */
err = regmap_update_bits(haptics->regmap, AW86927_WAVCFG1_REG,
AW86927_WAVCFG1_WAVSEQ1_MASK,
FIELD_PREP(AW86927_WAVCFG1_WAVSEQ1_MASK, 1));
if (err)
return err;
/* set wavseq 2 to zero */
err = regmap_update_bits(haptics->regmap, AW86927_WAVCFG2_REG,
AW86927_WAVCFG2_WAVSEQ2_MASK,
FIELD_PREP(AW86927_WAVCFG2_WAVSEQ2_MASK, 0));
if (err)
return err;
err = regmap_update_bits(haptics->regmap,
AW86927_WAVCFG9_REG,
AW86927_WAVCFG9_SEQ1LOOP_MASK,
FIELD_PREP(AW86927_WAVCFG9_SEQ1LOOP_MASK,
AW86927_WAVCFG9_SEQ1LOOP_INFINITELY));
if (err)
return err;
/* set gain to value lower than 0x80 to avoid distorted playback */
err = regmap_write(haptics->regmap, AW86927_PLAYCFG2_REG, 0x7c);
if (err)
return err;
/* Start playback */
err = regmap_write(haptics->regmap, AW86927_PLAYCFG4_REG, AW86927_PLAYCFG4_GO);
if (err)
return err;
return 0;
}
static void aw86927_close(struct input_dev *input)
{
struct aw86927_data *haptics = input_get_drvdata(input);
struct device *dev = &haptics->client->dev;
int err;
cancel_work_sync(&haptics->play_work);
err = aw86927_stop(haptics);
if (err)
dev_err(dev, "Failed to close the Driver: %d\n", err);
}
static void aw86927_haptics_play_work(struct work_struct *work)
{
struct aw86927_data *haptics =
container_of(work, struct aw86927_data, play_work);
struct device *dev = &haptics->client->dev;
int err;
if (haptics->running)
err = aw86927_play_sine(haptics);
else
err = aw86927_stop(haptics);
if (err)
dev_err(dev, "Failed to execute work command: %d\n", err);
}
static void aw86927_hw_reset(struct aw86927_data *haptics)
{
/* Assert reset */
gpiod_set_value_cansleep(haptics->reset_gpio, 1);
/* Wait ~1ms */
usleep_range(1000, 2000);
/* Deassert reset */
gpiod_set_value_cansleep(haptics->reset_gpio, 0);
/* Wait ~8ms until I2C is accessible */
usleep_range(8000, 8500);
}
static int aw86927_haptic_init(struct aw86927_data *haptics)
{
int err;
err = regmap_update_bits(haptics->regmap,
AW86927_SYSCTRL4_REG,
AW86927_SYSCTRL4_WAVDAT_MODE_MASK,
FIELD_PREP(AW86927_SYSCTRL4_WAVDAT_MODE_MASK,
AW86927_SYSCTRL4_WAVDAT_24K));
if (err)
return err;
/* enable gain bypass */
err = regmap_update_bits(haptics->regmap,
AW86927_SYSCTRL4_REG,
AW86927_SYSCTRL4_GAIN_BYPASS_MASK,
FIELD_PREP(AW86927_SYSCTRL4_GAIN_BYPASS_MASK,
0x01));
if (err)
return err;
err = regmap_write(haptics->regmap,
AW86927_TMCFG_REG, AW86927_TMCFG_UNLOCK);
if (err)
return err;
err = regmap_write(haptics->regmap, AW86927_ANACFG11_REG, 0x0f);
if (err)
return err;
err = regmap_update_bits(haptics->regmap,
AW86927_ANACFG12_REG,
AW86927_ANACFG12_BST_SKIP_MASK,
FIELD_PREP(AW86927_ANACFG12_BST_SKIP_MASK,
AW86927_ANACFG12_BST_SKIP_SHUTDOWN));
if (err)
return err;
err = regmap_update_bits(haptics->regmap,
AW86927_ANACFG15_REG,
AW86927_ANACFG15_BST_PEAK_MODE_MASK,
FIELD_PREP(AW86927_ANACFG15_BST_PEAK_MODE_MASK,
AW86927_ANACFG15_BST_PEAK_BACK));
if (err)
return err;
err = regmap_update_bits(haptics->regmap,
AW86927_ANACFG16_REG,
AW86927_ANACFG16_BST_SRC_MASK,
FIELD_PREP(AW86927_ANACFG16_BST_SRC_MASK,
AW86927_ANACFG16_BST_SRC_3NS));
if (err)
return err;
err = regmap_write(haptics->regmap,
AW86927_TMCFG_REG, AW86927_TMCFG_LOCK);
if (err)
return err;
err = regmap_update_bits(haptics->regmap,
AW86927_CONTCFG1_REG,
AW86927_CONTCFG1_BRK_BST_MD_MASK,
FIELD_PREP(AW86927_CONTCFG1_BRK_BST_MD_MASK, 0x00));
if (err)
return err;
err = regmap_write(haptics->regmap,
AW86927_CONTCFG5_REG,
FIELD_PREP(AW86927_CONTCFG5_BST_BRK_GAIN_MASK, 0x05) |
FIELD_PREP(AW86927_CONTCFG5_BRK_GAIN_MASK, 0x08));
if (err)
return err;
err = regmap_update_bits(haptics->regmap, AW86927_CONTCFG10_REG,
AW86927_CONTCFG10_BRK_TIME_MASK,
FIELD_PREP(AW86927_CONTCFG10_BRK_TIME_MASK,
AW86927_CONTCFG10_BRK_TIME_DEFAULT));
if (err)
return err;
err = regmap_write(haptics->regmap,
AW86927_CONTCFG13_REG,
FIELD_PREP(AW86927_CONTCFG13_TSET_MASK, 0x06) |
FIELD_PREP(AW86927_CONTCFG13_BEME_SET_MASK, 0x02));
if (err)
return err;
err = regmap_update_bits(haptics->regmap,
AW86927_DETCFG2_REG,
AW86927_DETCFG2_D2S_GAIN_MASK,
FIELD_PREP(AW86927_DETCFG2_D2S_GAIN_MASK,
AW86927_DETCFG2_D2S_GAIN_10));
if (err)
return err;
err = regmap_update_bits(haptics->regmap,
AW86927_PWMCFG1_REG,
AW86927_PWMCFG1_PRC_EN_MASK,
FIELD_PREP(AW86927_PWMCFG1_PRC_EN_MASK,
AW86927_PWMCFG1_PRC_DISABLE));
if (err)
return err;
err = regmap_write(haptics->regmap,
AW86927_PWMCFG3_REG,
FIELD_PREP(AW86927_PWMCFG3_PR_EN_MASK, 0x01) |
FIELD_PREP(AW86927_PWMCFG3_PRCTIME_MASK, 0x3f));
if (err)
return err;
err = regmap_update_bits(haptics->regmap,
AW86927_PWMCFG4_REG,
AW86927_PWMCFG4_PRTIME_MASK,
FIELD_PREP(AW86927_PWMCFG4_PRTIME_MASK, 0x32));
if (err)
return err;
err = regmap_write(haptics->regmap,
AW86927_TMCFG_REG, AW86927_TMCFG_UNLOCK);
if (err)
return err;
err = regmap_update_bits(haptics->regmap,
AW86927_ANACFG13_REG,
AW86927_ANACFG13_BST_PC_MASK,
FIELD_PREP(AW86927_ANACFG13_BST_PC_MASK,
AW86927_ANACFG13_BST_PEAKCUR_3P45A));
if (err)
return err;
err = regmap_write(haptics->regmap,
AW86927_TMCFG_REG, AW86927_TMCFG_LOCK);
if (err)
return err;
err = regmap_update_bits(haptics->regmap,
AW86927_PLAYCFG1_REG,
AW86927_PLAYCFG1_BST_VOUT_VREFSET_MASK,
FIELD_PREP(AW86927_PLAYCFG1_BST_VOUT_VREFSET_MASK,
AW86927_PLAYCFG1_BST_8500MV));
if (err)
return err;
err = regmap_update_bits(haptics->regmap,
AW86927_PLAYCFG3_REG,
AW86927_PLAYCFG3_AUTO_BST_MASK,
FIELD_PREP(AW86927_PLAYCFG3_AUTO_BST_MASK,
AW86927_PLAYCFG3_AUTO_BST_DISABLE));
if (err)
return err;
return 0;
}
static int aw86927_ram_init(struct aw86927_data *haptics)
{
int err;
err = aw86927_wait_enter_standby(haptics);
if (err)
return err;
/* Enable SRAM init */
err = regmap_update_bits(haptics->regmap,
AW86927_SYSCTRL3_REG,
AW86927_SYSCTRL3_EN_RAMINIT_MASK,
FIELD_PREP(AW86927_SYSCTRL3_EN_RAMINIT_MASK,
AW86927_SYSCTRL3_EN_RAMINIT_ON));
/* Set base address for the start of the SRAM waveforms */
err = regmap_write(haptics->regmap,
AW86927_BASEADDRH_REG, AW86927_BASEADDRH_VAL);
if (err)
return err;
err = regmap_write(haptics->regmap,
AW86927_BASEADDRL_REG, AW86927_BASEADDRL_VAL);
if (err)
return err;
/* Set start of SRAM, before the data is written it will be the same as the base */
err = regmap_write(haptics->regmap,
AW86927_RAMADDRH_REG, AW86927_BASEADDRH_VAL);
if (err)
return err;
err = regmap_write(haptics->regmap,
AW86927_RAMADDRL_REG, AW86927_BASEADDRL_VAL);
if (err)
return err;
/* Write waveform header to SRAM */
err = regmap_noinc_write(haptics->regmap, AW86927_RAMDATA_REG,
&sram_waveform_header, sizeof(sram_waveform_header));
if (err)
return err;
/* Write waveform to SRAM */
err = regmap_noinc_write(haptics->regmap, AW86927_RAMDATA_REG,
aw86927_waveform, ARRAY_SIZE(aw86927_waveform));
if (err)
return err;
err = regmap_update_bits(haptics->regmap,
AW86927_DETCFG2_REG,
AW86927_DETCFG2_DET_SEQ0_MASK,
FIELD_PREP(AW86927_DETCFG2_DET_SEQ0_MASK,
AW86927_DETCFG2_DET_SEQ0_VBAT));
if (err)
return err;
err = regmap_update_bits(haptics->regmap,
AW86927_DETCFG1_REG,
AW86927_DETCFG1_DET_GO_MASK,
FIELD_PREP(AW86927_DETCFG1_DET_GO_MASK,
AW86927_DETCFG1_DET_GO_DET_SEQ0));
if (err)
return err;
usleep_range(3000, 3500);
err = regmap_update_bits(haptics->regmap,
AW86927_DETCFG1_REG,
AW86927_DETCFG1_DET_GO_MASK,
FIELD_PREP(AW86927_DETCFG1_DET_GO_MASK,
AW86927_DETCFG1_DET_GO_NA));
if (err)
return err;
/* Disable SRAM init */
err = regmap_update_bits(haptics->regmap,
AW86927_SYSCTRL3_REG,
AW86927_SYSCTRL3_EN_RAMINIT_MASK,
FIELD_PREP(AW86927_SYSCTRL3_EN_RAMINIT_MASK,
AW86927_SYSCTRL3_EN_RAMINIT_OFF));
if (err)
return err;
return 0;
}
static irqreturn_t aw86927_irq(int irq, void *data)
{
struct aw86927_data *haptics = data;
struct device *dev = &haptics->client->dev;
unsigned int reg_val;
int err;
err = regmap_read(haptics->regmap, AW86927_SYSINT_REG, &reg_val);
if (err) {
dev_err(dev, "Failed to read SYSINT register: %d\n", err);
return IRQ_NONE;
}
if (reg_val & AW86927_SYSINT_BST_SCPI)
dev_err(dev, "Received a Short Circuit Protection interrupt\n");
if (reg_val & AW86927_SYSINT_BST_OVPI)
dev_err(dev, "Received an Over Voltage Protection interrupt\n");
if (reg_val & AW86927_SYSINT_UVLI)
dev_err(dev, "Received an Under Voltage Lock Out interrupt\n");
if (reg_val & AW86927_SYSINT_OCDI)
dev_err(dev, "Received an Over Current interrupt\n");
if (reg_val & AW86927_SYSINT_OTI)
dev_err(dev, "Received an Over Temperature interrupt\n");
if (reg_val & AW86927_SYSINT_DONEI)
dev_dbg(dev, "Chip playback done!\n");
if (reg_val & AW86927_SYSINT_FF_AFI)
dev_dbg(dev, "The RTP mode FIFO is almost full!\n");
if (reg_val & AW86927_SYSINT_FF_AEI)
dev_dbg(dev, "The RTP mode FIFO is almost empty!\n");
return IRQ_HANDLED;
}
static int aw86927_detect(struct aw86927_data *haptics)
{
__be16 read_buf;
u16 chip_id;
int err;
err = regmap_bulk_read(haptics->regmap, AW86927_CHIPIDH_REG, &read_buf, 2);
if (err)
return dev_err_probe(haptics->dev, err, "Failed to read CHIPID registers\n");
chip_id = be16_to_cpu(read_buf);
if (chip_id != AW86927_CHIPID) {
dev_err(haptics->dev, "Unexpected CHIPID value 0x%x\n", chip_id);
return -ENODEV;
}
return 0;
}
static int aw86927_probe(struct i2c_client *client)
{
struct aw86927_data *haptics;
int err;
haptics = devm_kzalloc(&client->dev, sizeof(struct aw86927_data), GFP_KERNEL);
if (!haptics)
return -ENOMEM;
haptics->dev = &client->dev;
haptics->client = client;
i2c_set_clientdata(client, haptics);
haptics->regmap = devm_regmap_init_i2c(client, &aw86927_regmap_config);
if (IS_ERR(haptics->regmap))
return dev_err_probe(haptics->dev, PTR_ERR(haptics->regmap),
"Failed to allocate register map\n");
haptics->input_dev = devm_input_allocate_device(haptics->dev);
if (!haptics->input_dev)
return -ENOMEM;
haptics->reset_gpio = devm_gpiod_get(haptics->dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(haptics->reset_gpio))
return dev_err_probe(haptics->dev, PTR_ERR(haptics->reset_gpio),
"Failed to get reset gpio\n");
/* Hardware reset */
aw86927_hw_reset(haptics);
/* Software reset */
err = regmap_write(haptics->regmap, AW86927_RSTCFG_REG, AW86927_RSTCFG_SOFTRST);
if (err)
return dev_err_probe(haptics->dev, err, "Failed Software reset\n");
/* Wait ~3ms until I2C is accessible */
usleep_range(3000, 3500);
err = aw86927_detect(haptics);
if (err)
return dev_err_probe(haptics->dev, err, "Failed to find chip\n");
/* IRQ config */
err = regmap_write(haptics->regmap, AW86927_SYSCTRL4_REG,
FIELD_PREP(AW86927_SYSCTRL4_INT_MODE_MASK,
AW86927_SYSCTRL4_INT_MODE_EDGE) |
FIELD_PREP(AW86927_SYSCTRL4_INT_EDGE_MODE_MASK,
AW86927_SYSCTRL4_INT_EDGE_MODE_POS));
if (err)
return dev_err_probe(haptics->dev, err, "Failed to configure interrupt modes\n");
err = regmap_write(haptics->regmap, AW86927_SYSINTM_REG,
AW86927_SYSINTM_BST_OVPM |
AW86927_SYSINTM_FF_AEM |
AW86927_SYSINTM_FF_AFM |
AW86927_SYSINTM_DONEM);
if (err)
return dev_err_probe(haptics->dev, err, "Failed to configure interrupt masks\n");
err = devm_request_threaded_irq(haptics->dev, client->irq, NULL,
aw86927_irq, IRQF_ONESHOT, NULL, haptics);
if (err)
return dev_err_probe(haptics->dev, err, "Failed to request threaded irq\n");
INIT_WORK(&haptics->play_work, aw86927_haptics_play_work);
haptics->input_dev->name = "aw86927-haptics";
haptics->input_dev->close = aw86927_close;
input_set_drvdata(haptics->input_dev, haptics);
input_set_capability(haptics->input_dev, EV_FF, FF_RUMBLE);
err = input_ff_create_memless(haptics->input_dev, NULL, aw86927_haptics_play);
if (err)
return dev_err_probe(haptics->dev, err, "Failed to create FF dev\n");
/* Set up registers */
err = aw86927_play_mode(haptics, AW86927_STANDBY_MODE);
if (err)
return dev_err_probe(haptics->dev, err,
"Failed to enter standby for Haptic init\n");
err = aw86927_haptic_init(haptics);
if (err)
return dev_err_probe(haptics->dev, err, "Haptic init failed\n");
/* RAM init, upload the waveform for playback */
err = aw86927_ram_init(haptics);
if (err)
return dev_err_probe(haptics->dev, err, "Failed to init aw86927 sram\n");
err = input_register_device(haptics->input_dev);
if (err)
return dev_err_probe(haptics->dev, err, "Failed to register input device\n");
return 0;
}
static const struct of_device_id aw86927_of_id[] = {
{ .compatible = "awinic,aw86927" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, aw86927_of_id);
static struct i2c_driver aw86927_driver = {
.driver = {
.name = "aw86927-haptics",
.of_match_table = aw86927_of_id,
},
.probe = aw86927_probe,
};
module_i2c_driver(aw86927_driver);
MODULE_AUTHOR("Griffin Kroah-Hartman <griffin.kroah@fairphone.com>");
MODULE_DESCRIPTION("AWINIC AW86927 LRA Haptic Driver");
MODULE_LICENSE("GPL");
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