| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20240827080229.1431784-3-wangshuaijie@awinic.com>
Date: Tue, 27 Aug 2024 08:02:29 +0000
From: wangshuaijie@...nic.com
To: jic23@...nel.org,
lars@...afoo.de,
robh@...nel.org,
krzk+dt@...nel.org,
conor+dt@...nel.org,
kees@...nel.org,
gustavoars@...nel.org,
linux-iio@...r.kernel.org,
devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org,
linux-hardening@...r.kernel.org
Cc: wangshuaijie@...nic.com,
liweilei@...nic.com,
kangjiajun@...nic.com
Subject: [PATCH V9 2/2] iio: proximity: aw96103: Add support for aw96103/aw96105 proximity sensor
From: shuaijie wang <wangshuaijie@...nic.com>
AW96103 is a low power consumption capacitive touch and proximity controller.
Each channel can be independently config as sensor input, shield output.
Channel Information:
aw96103: 3-channel
aw96105: 5-channel
Signed-off-by: shuaijie wang <wangshuaijie@...nic.com>
---
drivers/iio/proximity/Kconfig | 11 +
drivers/iio/proximity/Makefile | 1 +
drivers/iio/proximity/aw96103.c | 844 ++++++++++++++++++++++++++++++++
3 files changed, 856 insertions(+)
create mode 100644 drivers/iio/proximity/aw96103.c
diff --git a/drivers/iio/proximity/Kconfig b/drivers/iio/proximity/Kconfig
index 2ca3b0bc5eba..974aedf0c057 100644
--- a/drivers/iio/proximity/Kconfig
+++ b/drivers/iio/proximity/Kconfig
@@ -219,4 +219,15 @@ config VL53L0X_I2C
To compile this driver as a module, choose M here: the
module will be called vl53l0x-i2c.
+config AW96103
+ tristate "AW96103/AW96105 Awinic proximity sensor"
+ select REGMAP_I2C
+ depends on I2C
+ help
+ Say Y here to build a driver for Awinic's AW96103/AW96105 capacitive
+ proximity sensor.
+
+ To compile this driver as a module, choose M here: the
+ module will be called aw96103.
+
endmenu
diff --git a/drivers/iio/proximity/Makefile b/drivers/iio/proximity/Makefile
index f36598380446..b1e32aa93678 100644
--- a/drivers/iio/proximity/Makefile
+++ b/drivers/iio/proximity/Makefile
@@ -21,4 +21,5 @@ obj-$(CONFIG_SX_COMMON) += sx_common.o
obj-$(CONFIG_SX9500) += sx9500.o
obj-$(CONFIG_VCNL3020) += vcnl3020.o
obj-$(CONFIG_VL53L0X_I2C) += vl53l0x-i2c.o
+obj-$(CONFIG_AW96103) += aw96103.o
diff --git a/drivers/iio/proximity/aw96103.c b/drivers/iio/proximity/aw96103.c
new file mode 100644
index 000000000000..d3eca77f3f15
--- /dev/null
+++ b/drivers/iio/proximity/aw96103.c
@@ -0,0 +1,844 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * AWINIC aw96103 proximity sensor driver
+ *
+ * Author: Wang Shuaijie <wangshuaijie@...nic.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 <asm/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), \
+} \
+
+static const struct iio_chan_spec aw96103_channels[] = {
+ AW_IIO_CHANNEL(0),
+ AW_IIO_CHANNEL(1),
+ AW_IIO_CHANNEL(2),
+ AW_IIO_CHANNEL(3),
+};
+
+static const struct iio_chan_spec aw96105_channels[] = {
+ AW_IIO_CHANNEL(0),
+ AW_IIO_CHANNEL(1),
+ AW_IIO_CHANNEL(2),
+ AW_IIO_CHANNEL(3),
+ AW_IIO_CHANNEL(4),
+ AW_IIO_CHANNEL(5),
+};
+
+static const struct aw_chip_info aw_chip_info_tbl[] = {
+ [AW96103_VAL] = {
+ .name = "aw96103_sensor",
+ .channels = aw96103_channels,
+ .num_channels = ARRAY_SIZE(aw96103_channels),
+ },
+ [AW96105_VAL] = {
+ .name = "aw96105_sensor",
+ .channels = aw96105_channels,
+ .num_channels = ARRAY_SIZE(aw96105_channels),
+ },
+};
+
+static void aw96103_parsing_bin_file(struct aw_bin *bin)
+{
+ bin->valid_data_addr = AW96103_BIN_VALID_DATA_OFFSET;
+ bin->valid_data_len =
+ *(unsigned int *)(bin->data + AW96103_BIN_DATA_LEN_OFFSET) -
+ AW96103_BIN_DATA_REG_NUM_SIZE;
+ memcpy(bin->chip_type, bin->data + AW96103_BIN_CHIP_TYPE_OFFSET,
+ AW96103_BIN_CHIP_TYPE_SIZE);
+}
+
+static const struct regmap_config aw96103_regmap_confg = {
+ .reg_bits = 16,
+ .val_bits = 32,
+};
+
+static int aw96103_get_diff_raw(struct aw96103 *aw96103, unsigned int chan,
+ int *buf)
+{
+ u32 data;
+ int ret;
+
+ ret = regmap_read(aw96103->regmap,
+ AW96103_REG_DIFF_CH0 + chan * 4, &data);
+ if (ret)
+ return ret;
+ *buf = (int)(data / AW_DATA_PROCESS_FACTOR);
+
+ return 0;
+}
+
+static int aw96103_read_raw(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ int *val, int *val2, long mask)
+{
+ struct aw96103 *aw96103 = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ ret = aw96103_get_diff_raw(aw96103, chan->channel, val);
+ if (ret)
+ return ret;
+
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int aw96103_read_thresh(struct aw96103 *aw96103,
+ const struct iio_chan_spec *chan, int *val)
+{
+ int ret;
+
+ ret = regmap_read(aw96103->regmap,
+ AW96103_REG_PROXTH0_CH(chan->channel), val);
+ if (ret)
+ return ret;
+
+ return IIO_VAL_INT;
+}
+
+static int aw96103_read_out_debounce(struct aw96103 *aw96103,
+ const struct iio_chan_spec *chan,
+ int *val)
+{
+ unsigned int reg_val;
+ int ret;
+
+ ret = regmap_read(aw96103->regmap,
+ AW96103_REG_PROXCTRL_CH(chan->channel), ®_val);
+ if (ret)
+ return ret;
+ *val = FIELD_GET(AW96103_OUTDEB_MASK, reg_val);
+
+ return IIO_VAL_INT;
+}
+
+static int aw96103_read_in_debounce(struct aw96103 *aw96103,
+ const struct iio_chan_spec *chan, int *val)
+{
+ unsigned int reg_val;
+ int ret;
+
+ ret = regmap_read(aw96103->regmap,
+ AW96103_REG_PROXCTRL_CH(chan->channel), ®_val);
+ if (ret)
+ return ret;
+ *val = FIELD_GET(AW96103_INDEB_MASK, reg_val);
+
+ return IIO_VAL_INT;
+}
+
+static int aw96103_read_hysteresis(struct aw96103 *aw96103,
+ const struct iio_chan_spec *chan, int *val)
+{
+ unsigned int reg_val;
+ int ret;
+
+ ret = regmap_read(aw96103->regmap,
+ AW96103_REG_PROXCTRL_CH(chan->channel), ®_val);
+ if (ret)
+ return ret;
+ *val = FIELD_GET(AW96103_THHYST_MASK, reg_val);
+
+ return IIO_VAL_INT;
+}
+
+static int aw96103_read_event_val(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int *val, int *val2)
+{
+ struct aw96103 *aw96103 = iio_priv(indio_dev);
+
+ if (chan->type != IIO_PROXIMITY)
+ return -EINVAL;
+
+ switch (info) {
+ case IIO_EV_INFO_VALUE:
+ return aw96103_read_thresh(aw96103, chan, val);
+ case IIO_EV_INFO_PERIOD:
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ return aw96103_read_out_debounce(aw96103, chan, val);
+ case IIO_EV_DIR_FALLING:
+ return aw96103_read_in_debounce(aw96103, chan, val);
+ default:
+ return -EINVAL;
+ }
+ case IIO_EV_INFO_HYSTERESIS:
+ return aw96103_read_hysteresis(aw96103, chan, val);
+ default:
+ return -EINVAL;
+ }
+}
+
+static int aw96103_write_event_val(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info, int val, int val2)
+{
+ struct aw96103 *aw96103 = iio_priv(indio_dev);
+
+ if (chan->type != IIO_PROXIMITY)
+ return -EINVAL;
+
+ switch (info) {
+ case IIO_EV_INFO_VALUE:
+ return regmap_write(aw96103->regmap,
+ AW96103_REG_PROXTH0_CH(chan->channel), val);
+ case IIO_EV_INFO_PERIOD:
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ return regmap_update_bits(aw96103->regmap,
+ AW96103_REG_PROXCTRL_CH(chan->channel),
+ AW96103_OUTDEB_MASK,
+ FIELD_PREP(AW96103_OUTDEB_MASK, val));
+
+ case IIO_EV_DIR_FALLING:
+ return regmap_update_bits(aw96103->regmap,
+ AW96103_REG_PROXCTRL_CH(chan->channel),
+ AW96103_INDEB_MASK,
+ FIELD_PREP(AW96103_INDEB_MASK, val));
+ default:
+ return -EINVAL;
+ }
+ case IIO_EV_INFO_HYSTERESIS:
+ return regmap_update_bits(aw96103->regmap,
+ AW96103_REG_PROXCTRL_CH(chan->channel),
+ AW96103_THHYST_MASK,
+ FIELD_PREP(AW96103_THHYST_MASK, val));
+ default:
+ return -EINVAL;
+ }
+}
+
+static int aw96103_read_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+ struct aw96103 *aw96103 = iio_priv(indio_dev);
+
+ return aw96103->channels_arr[chan->channel].used;
+}
+
+static int aw96103_write_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir, int state)
+{
+ struct aw96103 *aw96103 = iio_priv(indio_dev);
+
+ aw96103->channels_arr[chan->channel].used = !!state;
+
+ return regmap_update_bits(aw96103->regmap, AW96103_REG_SCANCTRL0,
+ BIT(chan->channel),
+ state ? BIT(chan->channel) : 0);
+}
+
+struct iio_info iio_info = {
+ .read_raw = aw96103_read_raw,
+ .read_event_value = aw96103_read_event_val,
+ .write_event_value = aw96103_write_event_val,
+ .read_event_config = aw96103_read_event_config,
+ .write_event_config = aw96103_write_event_config,
+};
+
+static int aw96103_channel_scan_start(struct aw96103 *aw96103)
+{
+ int ret;
+
+ ret = regmap_write(aw96103->regmap, AW96103_REG_CMD,
+ AW96103_ACTIVE_MODE);
+ if (ret)
+ return ret;
+
+ return regmap_write(aw96103->regmap, AW96103_REG_IRQEN,
+ aw96103->hostirqen);
+}
+
+static int aw96103_reg_version_comp(struct aw96103 *aw96103,
+ struct aw_bin *aw_bin)
+{
+ u32 blfilt1_data, fw_ver;
+ unsigned char i;
+ int ret;
+
+ ret = regmap_read(aw96103->regmap, AW96103_REG_FWVER2, &fw_ver);
+ if (ret)
+ return ret;
+ /*
+ * If the chip version is AW96103A and the loaded register
+ * configuration file is for AW96103, special handling of the
+ * AW96103_REG_BLRSTRNG_CH0 register is required.
+ */
+ if ((fw_ver != AW96103A) || (aw_bin->chip_type[7] != '\0'))
+ return 0;
+
+ for (i = 0; i < aw96103->max_channels; i++) {
+ ret = regmap_read(aw96103->regmap,
+ AW96103_REG_BLFILT_CH0 + (AW96103_BLFILT_CH_STEP * i),
+ &blfilt1_data);
+ if (ret)
+ return ret;
+ if (FIELD_GET(AW96103_BLERRTRIG_MASK, blfilt1_data) != 1)
+ return 0;
+
+ return regmap_update_bits(aw96103->regmap,
+ AW96103_REG_BLRSTRNG_CH0 + (AW96103_BLFILT_CH_STEP * i),
+ AW96103_BLRSTRNG_MASK, 1 << i);
+ }
+
+ return 0;
+}
+
+static int aw96103_bin_valid_loaded(struct aw96103 *aw96103,
+ struct aw_bin *aw_bin_data_s)
+{
+ unsigned int start_addr = aw_bin_data_s->valid_data_addr;
+ u32 i, reg_data;
+ u16 reg_addr;
+ int ret;
+
+ for (i = 0; i < aw_bin_data_s->valid_data_len;
+ i += 6, start_addr += 6) {
+ reg_addr = get_unaligned_le16(aw_bin_data_s->data + start_addr);
+ reg_data = get_unaligned_le32(aw_bin_data_s->data +
+ start_addr + 2);
+ if ((reg_addr == AW96103_REG_EEDA0) ||
+ (reg_addr == AW96103_REG_EEDA1))
+ continue;
+ if (reg_addr == AW96103_REG_IRQEN) {
+ aw96103->hostirqen = reg_data;
+ continue;
+ }
+ if (reg_addr == AW96103_REG_SCANCTRL0)
+ aw96103->chan_en = FIELD_GET(AW96103_CHAN_EN_MASK,
+ reg_data);
+
+ ret = regmap_write(aw96103->regmap, reg_addr, reg_data);
+ if (ret < 0)
+ return ret;
+ }
+
+ ret = aw96103_reg_version_comp(aw96103, aw_bin_data_s);
+ if (ret)
+ return ret;
+
+ return aw96103_channel_scan_start(aw96103);
+}
+
+static int aw96103_para_loaded(struct aw96103 *aw96103)
+{
+ int i, ret;
+
+ for (i = 0; i < ARRAY_SIZE(aw96103_reg_default); i += 2) {
+ ret = regmap_write(aw96103->regmap,
+ (u16)aw96103_reg_default[i],
+ (u32)aw96103_reg_default[i + 1]);
+ if (ret)
+ return ret;
+ if (aw96103_reg_default[i] == AW96103_REG_IRQEN)
+ aw96103->hostirqen = aw96103_reg_default[i + 1];
+ else if (aw96103_reg_default[i] == AW96103_REG_SCANCTRL0)
+ aw96103->chan_en = FIELD_GET(AW96103_CHAN_EN_MASK,
+ aw96103_reg_default[i + 1]);
+ }
+
+ return aw96103_channel_scan_start(aw96103);
+}
+
+static int aw96103_cfg_all_loaded(const struct firmware *cont,
+ struct aw96103 *aw96103)
+{
+ if (!cont)
+ return -EINVAL;
+
+ struct aw_bin *aw_bin __free(kfree) =
+ kzalloc(cont->size + sizeof(*aw_bin), GFP_KERNEL);
+ if (!aw_bin)
+ return -ENOMEM;
+
+ aw_bin->len = cont->size;
+ memcpy(aw_bin->data, cont->data, cont->size);
+ release_firmware(cont);
+ aw96103_parsing_bin_file(aw_bin);
+
+ return aw96103_bin_valid_loaded(aw96103, aw_bin);
+}
+
+static void aw96103_cfg_update(const struct firmware *fw, void *data)
+{
+ struct aw96103 *aw96103 = data;
+ int ret, i;
+
+ if (!fw || !fw->data) {
+ dev_err(aw96103->dev, "No firmware.\n");
+ return;
+ }
+
+ ret = aw96103_cfg_all_loaded(fw, aw96103);
+ /*
+ * If loading the register configuration file fails,
+ * load the default register configuration in the driver to
+ * ensure the basic functionality of the device.
+ */
+ if (ret) {
+ ret = aw96103_para_loaded(aw96103);
+ if (ret) {
+ dev_err(aw96103->dev, "load param error.\n");
+ return;
+ }
+ }
+
+ for (i = 0; i < aw96103->max_channels; i++) {
+ if ((aw96103->chan_en >> i) & 0x01)
+ aw96103->channels_arr[i].used = true;
+ else
+ aw96103->channels_arr[i].used = false;
+ }
+}
+
+static int aw96103_sw_reset(struct aw96103 *aw96103)
+{
+ int ret;
+
+ ret = regmap_write(aw96103->regmap, AW96103_REG_RESET, 0);
+ /*
+ * After reset, the initialization process starts to perform and
+ * it will last for a bout 20ms.
+ */
+ msleep(20);
+
+ return ret;
+}
+
+enum aw96103_irq_trigger_position {
+ FAR = 0,
+ TRIGGER_TH0 = 0x01,
+ TRIGGER_TH1 = 0x03,
+ TRIGGER_TH2 = 0x07,
+ TRIGGER_TH3 = 0x0f,
+};
+
+static irqreturn_t aw96103_irq(int irq, void *data)
+{
+ unsigned int irq_status, curr_status_val, curr_status;
+ struct iio_dev *indio_dev = data;
+ struct aw96103 *aw96103 = iio_priv(indio_dev);
+ int ret, i;
+
+ ret = regmap_read(aw96103->regmap, AW96103_REG_IRQSRC, &irq_status);
+ if (ret)
+ return IRQ_HANDLED;
+
+ ret = regmap_read(aw96103->regmap, AW96103_REG_STAT0, &curr_status_val);
+ if (ret)
+ return IRQ_HANDLED;
+
+ /*
+ * Iteratively analyze the interrupt status of different channels,
+ * with each channel having 4 interrupt states.
+ */
+ for (i = 0; i < aw96103->max_channels; i++) {
+ if (!aw96103->channels_arr[i].used)
+ continue;
+
+ curr_status = (((curr_status_val >> (24 + i)) & 0x1)) |
+ (((curr_status_val >> (16 + i)) & 0x1) << 1) |
+ (((curr_status_val >> (8 + i)) & 0x1) << 2) |
+ (((curr_status_val >> i) & 0x1) << 3);
+ if (aw96103->channels_arr[i].old_irq_status == curr_status)
+ continue;
+
+ switch (curr_status) {
+ case FAR:
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, i,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_RISING),
+ iio_get_time_ns(indio_dev));
+ break;
+ case TRIGGER_TH0:
+ case TRIGGER_TH1:
+ case TRIGGER_TH2:
+ case TRIGGER_TH3:
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, i,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_FALLING),
+ iio_get_time_ns(indio_dev));
+ break;
+ default:
+ return IRQ_HANDLED;
+ }
+ aw96103->channels_arr[i].old_irq_status = curr_status;
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int aw96103_interrupt_init(struct iio_dev *indio_dev,
+ struct i2c_client *i2c)
+{
+ struct aw96103 *aw96103 = iio_priv(indio_dev);
+ unsigned int irq_status;
+ int ret;
+
+ ret = regmap_write(aw96103->regmap, AW96103_REG_IRQEN, 0);
+ if (ret)
+ return ret;
+ ret = regmap_read(aw96103->regmap, AW96103_REG_IRQSRC, &irq_status);
+ if (ret)
+ return ret;
+ ret = devm_request_threaded_irq(aw96103->dev, i2c->irq, NULL,
+ aw96103_irq, IRQF_ONESHOT,
+ "aw96103_irq", indio_dev);
+ if (ret)
+ return ret;
+
+ return regmap_write(aw96103->regmap, AW96103_REG_IRQEN,
+ aw96103->hostirqen);
+}
+
+static int aw96103_wait_chip_init(struct aw96103 *aw96103)
+{
+ unsigned int cnt = 20;
+ u32 reg_data;
+ int ret;
+
+ while (cnt--) {
+ /*
+ * The device should generate an initialization completion
+ * interrupt within 20ms.
+ */
+ ret = regmap_read(aw96103->regmap, AW96103_REG_IRQSRC,
+ ®_data);
+ if (ret)
+ return ret;
+
+ if (FIELD_GET(AW96103_INITOVERIRQ_MASK, reg_data))
+ return 0;
+ fsleep(1000);
+ }
+
+ return -ETIMEDOUT;
+}
+
+static int aw96103_read_chipid(struct aw96103 *aw96103)
+{
+ unsigned char cnt = 0;
+ u32 reg_val = 0;
+ int ret;
+
+ while (cnt < 3) {
+ /*
+ * This retry mechanism and the subsequent delay are just
+ * attempts to read the chip ID as much as possible,
+ * preventing occasional communication failures from causing
+ * the chip ID read to fail.
+ */
+ ret = regmap_read(aw96103->regmap, AW96103_REG_CHIPID,
+ ®_val);
+ if (ret < 0) {
+ cnt++;
+ fsleep(2000);
+ continue;
+ }
+ break;
+ }
+ if (cnt == 3)
+ return -ETIMEDOUT;
+
+ if (FIELD_GET(AW96103_CHIPID_MASK, reg_val) != AW96103_CHIP_ID)
+ dev_info(aw96103->dev,
+ "unexpected chipid, id=0x%08X\n", reg_val);
+
+ return 0;
+}
+
+static int aw96103_i2c_probe(struct i2c_client *i2c)
+{
+ const struct aw_chip_info *chip_info;
+ struct iio_dev *indio_dev;
+ struct aw96103 *aw96103;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&i2c->dev, sizeof(*aw96103));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ aw96103 = iio_priv(indio_dev);
+ aw96103->dev = &i2c->dev;
+ chip_info = i2c_get_match_data(i2c);
+ aw96103->max_channels = chip_info->num_channels;
+
+ aw96103->regmap = devm_regmap_init_i2c(i2c, &aw96103_regmap_confg);
+ if (IS_ERR(aw96103->regmap))
+ return PTR_ERR(aw96103->regmap);
+
+ ret = devm_regulator_get_enable(aw96103->dev, "vcc");
+ if (ret < 0)
+ return ret;
+
+ ret = aw96103_read_chipid(aw96103);
+ if (ret)
+ return ret;
+
+ ret = aw96103_sw_reset(aw96103);
+ if (ret)
+ return ret;
+
+ ret = aw96103_wait_chip_init(aw96103);
+ if (ret)
+ return ret;
+
+ ret = request_firmware_nowait(THIS_MODULE, true, "aw96103_0.bin",
+ aw96103->dev, GFP_KERNEL, aw96103,
+ aw96103_cfg_update);
+ if (ret)
+ return ret;
+
+ ret = aw96103_interrupt_init(indio_dev, i2c);
+ if (ret)
+ return ret;
+
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->num_channels = chip_info->num_channels;
+ indio_dev->channels = chip_info->channels;
+ indio_dev->info = &iio_info;
+ indio_dev->name = chip_info->name;
+
+ return devm_iio_device_register(aw96103->dev, indio_dev);
+}
+
+static const struct of_device_id aw96103_dt_match[] = {
+ {
+ .compatible = "awinic,aw96103",
+ .data = &aw_chip_info_tbl[AW96103_VAL]
+ },
+ {
+ .compatible = "awinic,aw96105",
+ .data = &aw_chip_info_tbl[AW96105_VAL]
+ },
+ { }
+};
+MODULE_DEVICE_TABLE(of, aw96103_dt_match);
+
+static const struct i2c_device_id aw96103_i2c_id[] = {
+ { "aw96103", (kernel_ulong_t)&aw_chip_info_tbl[AW96103_VAL] },
+ { "aw96105", (kernel_ulong_t)&aw_chip_info_tbl[AW96105_VAL] },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, aw96103_i2c_id);
+
+static struct i2c_driver aw96103_i2c_driver = {
+ .driver = {
+ .name = "aw96103_sensor",
+ .of_match_table = aw96103_dt_match,
+ },
+ .probe = aw96103_i2c_probe,
+ .id_table = aw96103_i2c_id,
+};
+module_i2c_driver(aw96103_i2c_driver);
+
+MODULE_AUTHOR("Wang Shuaijie <wangshuaijie@...nic.com>");
+MODULE_DESCRIPTION("Driver for Awinic AW96103 proximity sensor");
+MODULE_LICENSE("GPL v2");
--
2.45.1
Powered by blists - more mailing lists