path: root/drivers/iio/proximity/aw96103.c

// SPDX-License-Identifier: GPL-2.0
/*
 * AWINIC aw96103 proximity sensor driver
 *
 * Author: Wang Shuaijie <wangshuaijie@awinic.com>
 *
 * Copyright (c) 2024 awinic Technology CO., LTD
 */
#include <linux/bits.h>
#include <linux/bitfield.h>
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/iio/events.h>
#include <linux/iio/iio.h>
#include <linux/regulator/consumer.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/unaligned.h>

#define AW_DATA_PROCESS_FACTOR			1024
#define AW96103_CHIP_ID				0xa961
#define AW96103_BIN_VALID_DATA_OFFSET		64
#define AW96103_BIN_DATA_LEN_OFFSET		16
#define AW96103_BIN_DATA_REG_NUM_SIZE		4
#define AW96103_BIN_CHIP_TYPE_SIZE		8
#define AW96103_BIN_CHIP_TYPE_OFFSET		24

#define AW96103_REG_SCANCTRL0			0x0000
#define AW96103_REG_STAT0			0x0090
#define AW96103_REG_BLFILT_CH0			0x00A8
#define AW96103_REG_BLRSTRNG_CH0		0x00B4
#define AW96103_REG_DIFF_CH0			0x0240
#define AW96103_REG_FWVER2			0x0410
#define AW96103_REG_CMD				0xF008
#define AW96103_REG_IRQSRC			0xF080
#define AW96103_REG_IRQEN			0xF084
#define AW96103_REG_RESET			0xFF0C
#define AW96103_REG_CHIPID			0xFF10
#define AW96103_REG_EEDA0			0x0408
#define AW96103_REG_EEDA1			0x040C
#define AW96103_REG_PROXCTRL_CH0		0x00B0
#define AW96103_REG_PROXTH0_CH0			0x00B8
#define AW96103_PROXTH_CH_STEP			0x3C
#define AW96103_THHYST_MASK			GENMASK(13, 12)
#define AW96103_INDEB_MASK			GENMASK(11, 10)
#define AW96103_OUTDEB_MASK			GENMASK(9, 8)
#define AW96103_INITOVERIRQ_MASK		BIT(0)
#define AW96103_BLFILT_CH_STEP			0x3C
#define AW96103_BLRSTRNG_MASK			GENMASK(5, 0)
#define AW96103_CHIPID_MASK			GENMASK(31, 16)
#define AW96103_BLERRTRIG_MASK			BIT(25)
#define AW96103_CHAN_EN_MASK			GENMASK(5, 0)
#define AW96103_REG_PROXCTRL_CH(x)		\
		(AW96103_REG_PROXCTRL_CH0 + (x) * AW96103_PROXTH_CH_STEP)

#define AW96103_REG_PROXTH0_CH(x)		\
		(AW96103_REG_PROXTH0_CH0 + (x) * AW96103_PROXTH_CH_STEP)

/**
 * struct aw_bin - Store the data obtained from parsing the configuration file.
 * @chip_type: Frame header information-chip type
 * @valid_data_len: Length of valid data obtained after parsing
 * @valid_data_addr: The offset address of the valid data obtained
 *		     after parsing relative to info
 * @len: The size of the bin file obtained from the firmware
 * @data: Store the bin file obtained from the firmware
 */
struct aw_bin {
	unsigned char chip_type[8];
	unsigned int valid_data_len;
	unsigned int valid_data_addr;
	unsigned int len;
	unsigned char data[] __counted_by(len);
};

enum aw96103_sar_vers {
	AW96103 = 2,
	AW96103A = 6,
	AW96103B = 0xa,
};

enum aw96103_operation_mode {
	AW96103_ACTIVE_MODE = 1,
	AW96103_SLEEP_MODE = 2,
	AW96103_DEEPSLEEP_MODE = 3,
	AW96103B_DEEPSLEEP_MODE = 4,
};

enum aw96103_sensor_type {
	AW96103_VAL,
	AW96105_VAL,
};

struct aw_channels_info {
	bool used;
	unsigned int old_irq_status;
};

struct aw_chip_info {
	const char *name;
	struct iio_chan_spec const *channels;
	int num_channels;
};

struct aw96103 {
	unsigned int hostirqen;
	struct regmap *regmap;
	struct device *dev;
	/*
	 * There is one more logical channel than the actual channels,
	 * and the extra logical channel is used for temperature detection
	 * but not for status detection. The specific channel used for
	 * temperature detection is determined by the register configuration.
	 */
	struct aw_channels_info channels_arr[6];
	unsigned int max_channels;
	unsigned int chan_en;
};

static const unsigned int aw96103_reg_default[] = {
	0x0000, 0x00003f3f, 0x0004, 0x00000064, 0x0008, 0x0017c11e,
	0x000c, 0x05000000, 0x0010, 0x00093ffd, 0x0014, 0x19240009,
	0x0018, 0xd81c0207, 0x001c, 0xff000000, 0x0020, 0x00241900,
	0x0024, 0x00093ff7, 0x0028, 0x58020009, 0x002c, 0xd81c0207,
	0x0030, 0xff000000, 0x0034, 0x00025800, 0x0038, 0x00093fdf,
	0x003c, 0x7d3b0009, 0x0040, 0xd81c0207,	0x0044, 0xff000000,
	0x0048, 0x003b7d00, 0x004c, 0x00093f7f, 0x0050, 0xe9310009,
	0x0054, 0xd81c0207, 0x0058, 0xff000000,	0x005c, 0x0031e900,
	0x0060, 0x00093dff, 0x0064, 0x1a0c0009,	0x0068, 0xd81c0207,
	0x006c, 0xff000000, 0x0070, 0x000c1a00,	0x0074, 0x80093fff,
	0x0078, 0x043d0009, 0x007c, 0xd81c0207,	0x0080, 0xff000000,
	0x0084, 0x003d0400, 0x00a0, 0xe6400000,	0x00a4, 0x00000000,
	0x00a8, 0x010408d2, 0x00ac, 0x00000000,	0x00b0, 0x00000000,
	0x00b8, 0x00005fff, 0x00bc, 0x00000000,	0x00c0, 0x00000000,
	0x00c4, 0x00000000, 0x00c8, 0x00000000,	0x00cc, 0x00000000,
	0x00d0, 0x00000000, 0x00d4, 0x00000000, 0x00d8, 0x00000000,
	0x00dc, 0xe6447800, 0x00e0, 0x78000000,	0x00e4, 0x010408d2,
	0x00e8, 0x00000000, 0x00ec, 0x00000000,	0x00f4, 0x00005fff,
	0x00f8, 0x00000000, 0x00fc, 0x00000000,	0x0100, 0x00000000,
	0x0104, 0x00000000, 0x0108, 0x00000000,	0x010c, 0x02000000,
	0x0110, 0x00000000, 0x0114, 0x00000000,	0x0118, 0xe6447800,
	0x011c, 0x78000000, 0x0120, 0x010408d2,	0x0124, 0x00000000,
	0x0128, 0x00000000, 0x0130, 0x00005fff,	0x0134, 0x00000000,
	0x0138, 0x00000000, 0x013c, 0x00000000,	0x0140, 0x00000000,
	0x0144, 0x00000000, 0x0148, 0x02000000,	0x014c, 0x00000000,
	0x0150, 0x00000000, 0x0154, 0xe6447800,	0x0158, 0x78000000,
	0x015c, 0x010408d2, 0x0160, 0x00000000,	0x0164, 0x00000000,
	0x016c, 0x00005fff, 0x0170, 0x00000000,	0x0174, 0x00000000,
	0x0178, 0x00000000, 0x017c, 0x00000000,	0x0180, 0x00000000,
	0x0184, 0x02000000, 0x0188, 0x00000000,	0x018c, 0x00000000,
	0x0190, 0xe6447800, 0x0194, 0x78000000,	0x0198, 0x010408d2,
	0x019c, 0x00000000, 0x01a0, 0x00000000,	0x01a8, 0x00005fff,
	0x01ac, 0x00000000, 0x01b0, 0x00000000,	0x01b4, 0x00000000,
	0x01b8, 0x00000000, 0x01bc, 0x00000000,	0x01c0, 0x02000000,
	0x01c4, 0x00000000, 0x01c8, 0x00000000,	0x01cc, 0xe6407800,
	0x01d0, 0x78000000, 0x01d4, 0x010408d2,	0x01d8, 0x00000000,
	0x01dc, 0x00000000, 0x01e4, 0x00005fff,	0x01e8, 0x00000000,
	0x01ec, 0x00000000, 0x01f0, 0x00000000,	0x01f4, 0x00000000,
	0x01f8, 0x00000000, 0x01fc, 0x02000000,	0x0200, 0x00000000,
	0x0204, 0x00000000, 0x0208, 0x00000008,	0x020c, 0x0000000d,
	0x41fc, 0x00000000, 0x4400, 0x00000000,	0x4410, 0x00000000,
	0x4420, 0x00000000, 0x4430, 0x00000000,	0x4440, 0x00000000,
	0x4450, 0x00000000, 0x4460, 0x00000000,	0x4470, 0x00000000,
	0xf080, 0x00003018, 0xf084, 0x00000fff,	0xf800, 0x00000000,
	0xf804, 0x00002e00, 0xf8d0, 0x00000001,	0xf8d4, 0x00000000,
	0xff00, 0x00000301, 0xff0c, 0x01000000,	0xffe0, 0x00000000,
	0xfff4, 0x00004011, 0x0090, 0x00000000,	0x0094, 0x00000000,
	0x0098, 0x00000000, 0x009c, 0x3f3f3f3f,
};

static const struct iio_event_spec aw_common_events[3] = {
	{
		.type = IIO_EV_TYPE_THRESH,
		.dir = IIO_EV_DIR_RISING,
		.mask_separate = BIT(IIO_EV_INFO_PERIOD),
	},
	{
		.type = IIO_EV_TYPE_THRESH,
		.dir = IIO_EV_DIR_FALLING,
		.mask_separate = BIT(IIO_EV_INFO_PERIOD),
	},
	{
		.type = IIO_EV_TYPE_THRESH,
		.dir = IIO_EV_DIR_EITHER,
		.mask_separate = BIT(IIO_EV_INFO_ENABLE) |
			BIT(IIO_EV_INFO_HYSTERESIS) |
			BIT(IIO_EV_INFO_VALUE),
	}
};

#define AW_IIO_CHANNEL(idx)			\
{								\
	.type = IIO_PROXIMITY,				\
	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),	\
	.indexed = 1,			\
	.channel = idx,			\
	.event_spec = aw_common_events,		\
	.num_event_specs = ARRAY_SIZE(aw_common_events),	\