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ubuntu-linux-kernel/drivers/iio/accel/kxcjk-1013.c

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/*
* KXCJK-1013 3-axis accelerometer driver
* Copyright (c) 2014, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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/module.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/bitops.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/acpi.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/buffer.h>
#include <linux/iio/trigger.h>
#include <linux/iio/events.h>
#include <linux/iio/trigger_consumer.h>
#include <linux/iio/triggered_buffer.h>
#include <linux/iio/accel/kxcjk_1013.h>
#define KXCJK1013_DRV_NAME "kxcjk1013"
#define KXCJK1013_IRQ_NAME "kxcjk1013_event"
#define KXTF9_REG_HP_XOUT_L 0x00
#define KXTF9_REG_HP_XOUT_H 0x01
#define KXTF9_REG_HP_YOUT_L 0x02
#define KXTF9_REG_HP_YOUT_H 0x03
#define KXTF9_REG_HP_ZOUT_L 0x04
#define KXTF9_REG_HP_ZOUT_H 0x05
#define KXCJK1013_REG_XOUT_L 0x06
/*
* From low byte X axis register, all the other addresses of Y and Z can be
* obtained by just applying axis offset. The following axis defines are just
* provide clarity, but not used.
*/
#define KXCJK1013_REG_XOUT_H 0x07
#define KXCJK1013_REG_YOUT_L 0x08
#define KXCJK1013_REG_YOUT_H 0x09
#define KXCJK1013_REG_ZOUT_L 0x0A
#define KXCJK1013_REG_ZOUT_H 0x0B
#define KXCJK1013_REG_DCST_RESP 0x0C
#define KXCJK1013_REG_WHO_AM_I 0x0F
#define KXTF9_REG_TILT_POS_CUR 0x10
#define KXTF9_REG_TILT_POS_PREV 0x11
#define KXTF9_REG_INT_SRC1 0x15
#define KXCJK1013_REG_INT_SRC1 0x16 /* compatible, but called INT_SRC2 in KXTF9 ds */
#define KXCJK1013_REG_INT_SRC2 0x17
#define KXCJK1013_REG_STATUS_REG 0x18
#define KXCJK1013_REG_INT_REL 0x1A
#define KXCJK1013_REG_CTRL1 0x1B
#define KXTF9_REG_CTRL2 0x1C
#define KXCJK1013_REG_CTRL2 0x1D /* mostly compatible, CTRL_REG3 in KTXF9 ds */
#define KXCJK1013_REG_INT_CTRL1 0x1E
#define KXCJK1013_REG_INT_CTRL2 0x1F
#define KXTF9_REG_INT_CTRL3 0x20
#define KXCJK1013_REG_DATA_CTRL 0x21
#define KXTF9_REG_TILT_TIMER 0x28
#define KXCJK1013_REG_WAKE_TIMER 0x29
#define KXTF9_REG_TDT_TIMER 0x2B
#define KXTF9_REG_TDT_THRESH_H 0x2C
#define KXTF9_REG_TDT_THRESH_L 0x2D
#define KXTF9_REG_TDT_TAP_TIMER 0x2E
#define KXTF9_REG_TDT_TOTAL_TIMER 0x2F
#define KXTF9_REG_TDT_LATENCY_TIMER 0x30
#define KXTF9_REG_TDT_WINDOW_TIMER 0x31
#define KXCJK1013_REG_SELF_TEST 0x3A
#define KXTF9_REG_WAKE_THRESH 0x5A
#define KXTF9_REG_TILT_ANGLE 0x5C
#define KXTF9_REG_HYST_SET 0x5F
#define KXCJK1013_REG_WAKE_THRES 0x6A
#define KXCJK1013_REG_CTRL1_BIT_PC1 BIT(7)
#define KXCJK1013_REG_CTRL1_BIT_RES BIT(6)
#define KXCJK1013_REG_CTRL1_BIT_DRDY BIT(5)
#define KXCJK1013_REG_CTRL1_BIT_GSEL1 BIT(4)
#define KXCJK1013_REG_CTRL1_BIT_GSEL0 BIT(3)
#define KXCJK1013_REG_CTRL1_BIT_WUFE BIT(1)
#define KXCJK1013_REG_INT_CTRL1_BIT_IEU BIT(2) /* KXTF9 */
#define KXCJK1013_REG_INT_CTRL1_BIT_IEL BIT(3)
#define KXCJK1013_REG_INT_CTRL1_BIT_IEA BIT(4)
#define KXCJK1013_REG_INT_CTRL1_BIT_IEN BIT(5)
#define KXTF9_REG_TILT_BIT_LEFT_EDGE BIT(5)
#define KXTF9_REG_TILT_BIT_RIGHT_EDGE BIT(4)
#define KXTF9_REG_TILT_BIT_LOWER_EDGE BIT(3)
#define KXTF9_REG_TILT_BIT_UPPER_EDGE BIT(2)
#define KXTF9_REG_TILT_BIT_FACE_DOWN BIT(1)
#define KXTF9_REG_TILT_BIT_FACE_UP BIT(0)
#define KXCJK1013_DATA_MASK_12_BIT 0x0FFF
#define KXCJK1013_MAX_STARTUP_TIME_US 100000
#define KXCJK1013_SLEEP_DELAY_MS 2000
#define KXCJK1013_REG_INT_SRC1_BIT_TPS BIT(0) /* KXTF9 */
#define KXCJK1013_REG_INT_SRC1_BIT_WUFS BIT(1)
#define KXCJK1013_REG_INT_SRC1_MASK_TDTS (BIT(2) | BIT(3)) /* KXTF9 */
#define KXCJK1013_REG_INT_SRC1_TAP_NONE 0
#define KXCJK1013_REG_INT_SRC1_TAP_SINGLE BIT(2)
#define KXCJK1013_REG_INT_SRC1_TAP_DOUBLE BIT(3)
#define KXCJK1013_REG_INT_SRC1_BIT_DRDY BIT(4)
/* KXCJK: INT_SOURCE2: motion detect, KXTF9: INT_SRC_REG1: tap detect */
#define KXCJK1013_REG_INT_SRC2_BIT_ZP BIT(0)
#define KXCJK1013_REG_INT_SRC2_BIT_ZN BIT(1)
#define KXCJK1013_REG_INT_SRC2_BIT_YP BIT(2)
#define KXCJK1013_REG_INT_SRC2_BIT_YN BIT(3)
#define KXCJK1013_REG_INT_SRC2_BIT_XP BIT(4)
#define KXCJK1013_REG_INT_SRC2_BIT_XN BIT(5)
#define KXCJK1013_DEFAULT_WAKE_THRES 1
enum kx_chipset {
KXCJK1013,
KXCJ91008,
KXTJ21009,
KXTF9,
KX_MAX_CHIPS /* this must be last */
};
struct kxcjk1013_data {
struct i2c_client *client;
struct iio_trigger *dready_trig;
struct iio_trigger *motion_trig;
struct mutex mutex;
s16 buffer[8];
u8 odr_bits;
u8 range;
int wake_thres;
int wake_dur;
bool active_high_intr;
bool dready_trigger_on;
int ev_enable_state;
bool motion_trigger_on;
int64_t timestamp;
enum kx_chipset chipset;
bool is_smo8500_device;
};
enum kxcjk1013_axis {
AXIS_X,
AXIS_Y,
AXIS_Z,
AXIS_MAX,
};
enum kxcjk1013_mode {
STANDBY,
OPERATION,
};
enum kxcjk1013_range {
KXCJK1013_RANGE_2G,
KXCJK1013_RANGE_4G,
KXCJK1013_RANGE_8G,
};
struct kx_odr_map {
int val;
int val2;
int odr_bits;
int wuf_bits;
};
static const struct kx_odr_map samp_freq_table[] = {
{ 0, 781000, 0x08, 0x00 },
{ 1, 563000, 0x09, 0x01 },
{ 3, 125000, 0x0A, 0x02 },
{ 6, 250000, 0x0B, 0x03 },
{ 12, 500000, 0x00, 0x04 },
{ 25, 0, 0x01, 0x05 },
{ 50, 0, 0x02, 0x06 },
{ 100, 0, 0x03, 0x06 },
{ 200, 0, 0x04, 0x06 },
{ 400, 0, 0x05, 0x06 },
{ 800, 0, 0x06, 0x06 },
{ 1600, 0, 0x07, 0x06 },
};
static const char *const kxcjk1013_samp_freq_avail =
"0.781000 1.563000 3.125000 6.250000 12.500000 25 50 100 200 400 800 1600";
static const struct kx_odr_map kxtf9_samp_freq_table[] = {
{ 25, 0, 0x01, 0x00 },
{ 50, 0, 0x02, 0x01 },
{ 100, 0, 0x03, 0x01 },
{ 200, 0, 0x04, 0x01 },
{ 400, 0, 0x05, 0x01 },
{ 800, 0, 0x06, 0x01 },
};
static const char *const kxtf9_samp_freq_avail =
"25 50 100 200 400 800";
/* Refer to section 4 of the specification */
static const struct {
int odr_bits;
int usec;
} odr_start_up_times[KX_MAX_CHIPS][12] = {
/* KXCJK-1013 */
{
{0x08, 100000},
{0x09, 100000},
{0x0A, 100000},
{0x0B, 100000},
{0, 80000},
{0x01, 41000},
{0x02, 21000},
{0x03, 11000},
{0x04, 6400},
{0x05, 3900},
{0x06, 2700},
{0x07, 2100},
},
/* KXCJ9-1008 */
{
{0x08, 100000},
{0x09, 100000},
{0x0A, 100000},
{0x0B, 100000},
{0, 80000},
{0x01, 41000},
{0x02, 21000},
{0x03, 11000},
{0x04, 6400},
{0x05, 3900},
{0x06, 2700},
{0x07, 2100},
},
/* KXCTJ2-1009 */
{
{0x08, 1240000},
{0x09, 621000},
{0x0A, 309000},
{0x0B, 151000},
{0, 80000},
{0x01, 41000},
{0x02, 21000},
{0x03, 11000},
{0x04, 6000},
{0x05, 4000},
{0x06, 3000},
{0x07, 2000},
},
/* KXTF9 */
{
{0x01, 81000},
{0x02, 41000},
{0x03, 21000},
{0x04, 11000},
{0x05, 5100},
{0x06, 2700},
},
};
static const struct {
u16 scale;
u8 gsel_0;
u8 gsel_1;
} KXCJK1013_scale_table[] = { {9582, 0, 0},
{19163, 1, 0},
{38326, 0, 1} };
static int kxcjk1013_set_mode(struct kxcjk1013_data *data,
enum kxcjk1013_mode mode)
{
int ret;
ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
if (ret < 0) {
dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
return ret;
}
if (mode == STANDBY)
ret &= ~KXCJK1013_REG_CTRL1_BIT_PC1;
else
ret |= KXCJK1013_REG_CTRL1_BIT_PC1;
ret = i2c_smbus_write_byte_data(data->client,
KXCJK1013_REG_CTRL1, ret);
if (ret < 0) {
dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
return ret;
}
return 0;
}
static int kxcjk1013_get_mode(struct kxcjk1013_data *data,
enum kxcjk1013_mode *mode)
{
int ret;
ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
if (ret < 0) {
dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
return ret;
}
if (ret & KXCJK1013_REG_CTRL1_BIT_PC1)
*mode = OPERATION;
else
*mode = STANDBY;
return 0;
}
static int kxcjk1013_set_range(struct kxcjk1013_data *data, int range_index)
{
int ret;
ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
if (ret < 0) {
dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
return ret;
}
ret &= ~(KXCJK1013_REG_CTRL1_BIT_GSEL0 |
KXCJK1013_REG_CTRL1_BIT_GSEL1);
ret |= (KXCJK1013_scale_table[range_index].gsel_0 << 3);
ret |= (KXCJK1013_scale_table[range_index].gsel_1 << 4);
ret = i2c_smbus_write_byte_data(data->client,
KXCJK1013_REG_CTRL1,
ret);
if (ret < 0) {
dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
return ret;
}
data->range = range_index;
return 0;
}
static int kxcjk1013_chip_init(struct kxcjk1013_data *data)
{
int ret;
ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_WHO_AM_I);
if (ret < 0) {
dev_err(&data->client->dev, "Error reading who_am_i\n");
return ret;
}
dev_dbg(&data->client->dev, "KXCJK1013 Chip Id %x\n", ret);
ret = kxcjk1013_set_mode(data, STANDBY);
if (ret < 0)
return ret;
ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
if (ret < 0) {
dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
return ret;
}
/* Set 12 bit mode */
ret |= KXCJK1013_REG_CTRL1_BIT_RES;
ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL1,
ret);
if (ret < 0) {
dev_err(&data->client->dev, "Error reading reg_ctrl\n");
return ret;
}
/* Setting range to 4G */
ret = kxcjk1013_set_range(data, KXCJK1013_RANGE_4G);
if (ret < 0)
return ret;
ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_DATA_CTRL);
if (ret < 0) {
dev_err(&data->client->dev, "Error reading reg_data_ctrl\n");
return ret;
}
data->odr_bits = ret;
/* Set up INT polarity */
ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
if (ret < 0) {
dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
return ret;
}
if (data->active_high_intr)
ret |= KXCJK1013_REG_INT_CTRL1_BIT_IEA;
else
ret &= ~KXCJK1013_REG_INT_CTRL1_BIT_IEA;
ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
ret);
if (ret < 0) {
dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
return ret;
}
ret = kxcjk1013_set_mode(data, OPERATION);
if (ret < 0)
return ret;
data->wake_thres = KXCJK1013_DEFAULT_WAKE_THRES;
return 0;
}
#ifdef CONFIG_PM
static int kxcjk1013_get_startup_times(struct kxcjk1013_data *data)
{
int i;
int idx = data->chipset;
for (i = 0; i < ARRAY_SIZE(odr_start_up_times[idx]); ++i) {
if (odr_start_up_times[idx][i].odr_bits == data->odr_bits)
return odr_start_up_times[idx][i].usec;
}
return KXCJK1013_MAX_STARTUP_TIME_US;
}
#endif
static int kxcjk1013_set_power_state(struct kxcjk1013_data *data, bool on)
{
#ifdef CONFIG_PM
int ret;
if (on)
ret = pm_runtime_get_sync(&data->client->dev);
else {
pm_runtime_mark_last_busy(&data->client->dev);
ret = pm_runtime_put_autosuspend(&data->client->dev);
}
if (ret < 0) {
dev_err(&data->client->dev,
"Failed: kxcjk1013_set_power_state for %d\n", on);
if (on)
pm_runtime_put_noidle(&data->client->dev);
return ret;
}
#endif
return 0;
}
static int kxcjk1013_chip_update_thresholds(struct kxcjk1013_data *data)
{
int waketh_reg, ret;
ret = i2c_smbus_write_byte_data(data->client,
KXCJK1013_REG_WAKE_TIMER,
data->wake_dur);
if (ret < 0) {
dev_err(&data->client->dev,
"Error writing reg_wake_timer\n");
return ret;
}
waketh_reg = data->chipset == KXTF9 ?
KXTF9_REG_WAKE_THRESH : KXCJK1013_REG_WAKE_THRES;
ret = i2c_smbus_write_byte_data(data->client, waketh_reg,
data->wake_thres);
if (ret < 0) {
dev_err(&data->client->dev, "Error writing reg_wake_thres\n");
return ret;
}
return 0;
}
static int kxcjk1013_setup_any_motion_interrupt(struct kxcjk1013_data *data,
bool status)
{
int ret;
enum kxcjk1013_mode store_mode;
ret = kxcjk1013_get_mode(data, &store_mode);
if (ret < 0)
return ret;
/* This is requirement by spec to change state to STANDBY */
ret = kxcjk1013_set_mode(data, STANDBY);
if (ret < 0)
return ret;
ret = kxcjk1013_chip_update_thresholds(data);
if (ret < 0)
return ret;
ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
if (ret < 0) {
dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
return ret;
}
if (status)
ret |= KXCJK1013_REG_INT_CTRL1_BIT_IEN;
else
ret &= ~KXCJK1013_REG_INT_CTRL1_BIT_IEN;
ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
ret);
if (ret < 0) {
dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
return ret;
}
ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
if (ret < 0) {
dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
return ret;
}
if (status)
ret |= KXCJK1013_REG_CTRL1_BIT_WUFE;
else
ret &= ~KXCJK1013_REG_CTRL1_BIT_WUFE;
ret = i2c_smbus_write_byte_data(data->client,
KXCJK1013_REG_CTRL1, ret);
if (ret < 0) {
dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
return ret;
}
if (store_mode == OPERATION) {
ret = kxcjk1013_set_mode(data, OPERATION);
if (ret < 0)
return ret;
}
return 0;
}
static int kxcjk1013_setup_new_data_interrupt(struct kxcjk1013_data *data,
bool status)
{
int ret;
enum kxcjk1013_mode store_mode;
ret = kxcjk1013_get_mode(data, &store_mode);
if (ret < 0)
return ret;
/* This is requirement by spec to change state to STANDBY */
ret = kxcjk1013_set_mode(data, STANDBY);
if (ret < 0)
return ret;
ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
if (ret < 0) {
dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
return ret;
}
if (status)
ret |= KXCJK1013_REG_INT_CTRL1_BIT_IEN;
else
ret &= ~KXCJK1013_REG_INT_CTRL1_BIT_IEN;
ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
ret);
if (ret < 0) {
dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
return ret;
}
ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
if (ret < 0) {
dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
return ret;
}
if (status)
ret |= KXCJK1013_REG_CTRL1_BIT_DRDY;
else
ret &= ~KXCJK1013_REG_CTRL1_BIT_DRDY;
ret = i2c_smbus_write_byte_data(data->client,
KXCJK1013_REG_CTRL1, ret);
if (ret < 0) {
dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
return ret;
}
if (store_mode == OPERATION) {
ret = kxcjk1013_set_mode(data, OPERATION);
if (ret < 0)
return ret;
}
return 0;
}
static const struct kx_odr_map *kxcjk1013_find_odr_value(
const struct kx_odr_map *map, size_t map_size, int val, int val2)
{
int i;
for (i = 0; i < map_size; ++i) {
if (map[i].val == val && map[i].val2 == val2)
return &map[i];
}
return ERR_PTR(-EINVAL);
}
static int kxcjk1013_convert_odr_value(const struct kx_odr_map *map,
size_t map_size, int odr_bits,
int *val, int *val2)
{
int i;
for (i = 0; i < map_size; ++i) {
if (map[i].odr_bits == odr_bits) {
*val = map[i].val;
*val2 = map[i].val2;
return IIO_VAL_INT_PLUS_MICRO;
}
}
return -EINVAL;
}
static int kxcjk1013_set_odr(struct kxcjk1013_data *data, int val, int val2)
{
int ret;
enum kxcjk1013_mode store_mode;
const struct kx_odr_map *odr_setting;
ret = kxcjk1013_get_mode(data, &store_mode);
if (ret < 0)
return ret;
if (data->chipset == KXTF9)
odr_setting = kxcjk1013_find_odr_value(kxtf9_samp_freq_table,
ARRAY_SIZE(kxtf9_samp_freq_table),
val, val2);
else
odr_setting = kxcjk1013_find_odr_value(samp_freq_table,
ARRAY_SIZE(samp_freq_table),
val, val2);
if (IS_ERR(odr_setting))
return PTR_ERR(odr_setting);
/* To change ODR, the chip must be set to STANDBY as per spec */
ret = kxcjk1013_set_mode(data, STANDBY);
if (ret < 0)
return ret;
ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_DATA_CTRL,
odr_setting->odr_bits);
if (ret < 0) {
dev_err(&data->client->dev, "Error writing data_ctrl\n");
return ret;
}
data->odr_bits = odr_setting->odr_bits;
ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL2,
odr_setting->wuf_bits);
if (ret < 0) {
dev_err(&data->client->dev, "Error writing reg_ctrl2\n");
return ret;
}
if (store_mode == OPERATION) {
ret = kxcjk1013_set_mode(data, OPERATION);
if (ret < 0)
return ret;
}
return 0;
}
static int kxcjk1013_get_odr(struct kxcjk1013_data *data, int *val, int *val2)
{
if (data->chipset == KXTF9)
return kxcjk1013_convert_odr_value(kxtf9_samp_freq_table,
ARRAY_SIZE(kxtf9_samp_freq_table),
data->odr_bits, val, val2);
else
return kxcjk1013_convert_odr_value(samp_freq_table,
ARRAY_SIZE(samp_freq_table),
data->odr_bits, val, val2);
}
static int kxcjk1013_get_acc_reg(struct kxcjk1013_data *data, int axis)
{
u8 reg = KXCJK1013_REG_XOUT_L + axis * 2;
int ret;
ret = i2c_smbus_read_word_data(data->client, reg);
if (ret < 0) {
dev_err(&data->client->dev,
"failed to read accel_%c registers\n", 'x' + axis);
return ret;
}
return ret;
}
static int kxcjk1013_set_scale(struct kxcjk1013_data *data, int val)
{
int ret, i;
enum kxcjk1013_mode store_mode;
for (i = 0; i < ARRAY_SIZE(KXCJK1013_scale_table); ++i) {
if (KXCJK1013_scale_table[i].scale == val) {
ret = kxcjk1013_get_mode(data, &store_mode);
if (ret < 0)
return ret;
ret = kxcjk1013_set_mode(data, STANDBY);
if (ret < 0)
return ret;
ret = kxcjk1013_set_range(data, i);
if (ret < 0)
return ret;
if (store_mode == OPERATION) {
ret = kxcjk1013_set_mode(data, OPERATION);
if (ret)
return ret;
}
return 0;
}
}
return -EINVAL;
}
static int kxcjk1013_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan, int *val,
int *val2, long mask)
{
struct kxcjk1013_data *data = iio_priv(indio_dev);
int ret;
switch (mask) {
case IIO_CHAN_INFO_RAW:
mutex_lock(&data->mutex);
if (iio_buffer_enabled(indio_dev))
ret = -EBUSY;
else {
ret = kxcjk1013_set_power_state(data, true);
if (ret < 0) {
mutex_unlock(&data->mutex);
return ret;
}
ret = kxcjk1013_get_acc_reg(data, chan->scan_index);
if (ret < 0) {
kxcjk1013_set_power_state(data, false);
mutex_unlock(&data->mutex);
return ret;
}
*val = sign_extend32(ret >> 4, 11);
ret = kxcjk1013_set_power_state(data, false);
}
mutex_unlock(&data->mutex);
if (ret < 0)
return ret;
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
*val = 0;
*val2 = KXCJK1013_scale_table[data->range].scale;
return IIO_VAL_INT_PLUS_MICRO;
case IIO_CHAN_INFO_SAMP_FREQ:
mutex_lock(&data->mutex);
ret = kxcjk1013_get_odr(data, val, val2);
mutex_unlock(&data->mutex);
return ret;
default:
return -EINVAL;
}
}
static int kxcjk1013_write_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan, int val,
int val2, long mask)
{
struct kxcjk1013_data *data = iio_priv(indio_dev);
int ret;
switch (mask) {
case IIO_CHAN_INFO_SAMP_FREQ:
mutex_lock(&data->mutex);
ret = kxcjk1013_set_odr(data, val, val2);
mutex_unlock(&data->mutex);
break;
case IIO_CHAN_INFO_SCALE:
if (val)
return -EINVAL;
mutex_lock(&data->mutex);
ret = kxcjk1013_set_scale(data, val2);
mutex_unlock(&data->mutex);
break;
default:
ret = -EINVAL;
}
return ret;
}
static int kxcjk1013_read_event(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 kxcjk1013_data *data = iio_priv(indio_dev);
*val2 = 0;
switch (info) {
case IIO_EV_INFO_VALUE:
*val = data->wake_thres;
break;
case IIO_EV_INFO_PERIOD:
*val = data->wake_dur;
break;
default:
return -EINVAL;
}
return IIO_VAL_INT;
}
static int kxcjk1013_write_event(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 kxcjk1013_data *data = iio_priv(indio_dev);
if (data->ev_enable_state)
return -EBUSY;
switch (info) {
case IIO_EV_INFO_VALUE:
data->wake_thres = val;
break;
case IIO_EV_INFO_PERIOD:
data->wake_dur = val;
break;
default:
return -EINVAL;
}
return 0;
}
static int kxcjk1013_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 kxcjk1013_data *data = iio_priv(indio_dev);
return data->ev_enable_state;
}
static int kxcjk1013_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 kxcjk1013_data *data = iio_priv(indio_dev);
int ret;
if (state && data->ev_enable_state)
return 0;
mutex_lock(&data->mutex);
if (!state && data->motion_trigger_on) {
data->ev_enable_state = 0;
mutex_unlock(&data->mutex);
return 0;
}
/*
* We will expect the enable and disable to do operation in
* in reverse order. This will happen here anyway as our
* resume operation uses sync mode runtime pm calls, the
* suspend operation will be delayed by autosuspend delay
* So the disable operation will still happen in reverse of
* enable operation. When runtime pm is disabled the mode
* is always on so sequence doesn't matter
*/
ret = kxcjk1013_set_power_state(data, state);
if (ret < 0) {
mutex_unlock(&data->mutex);
return ret;
}
ret = kxcjk1013_setup_any_motion_interrupt(data, state);
if (ret < 0) {
kxcjk1013_set_power_state(data, false);
data->ev_enable_state = 0;
mutex_unlock(&data->mutex);
return ret;
}
data->ev_enable_state = state;
mutex_unlock(&data->mutex);
return 0;
}
static int kxcjk1013_buffer_preenable(struct iio_dev *indio_dev)
{
struct kxcjk1013_data *data = iio_priv(indio_dev);
return kxcjk1013_set_power_state(data, true);
}
static int kxcjk1013_buffer_postdisable(struct iio_dev *indio_dev)
{
struct kxcjk1013_data *data = iio_priv(indio_dev);
return kxcjk1013_set_power_state(data, false);
}
static ssize_t kxcjk1013_get_samp_freq_avail(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct kxcjk1013_data *data = iio_priv(indio_dev);
const char *str;
if (data->chipset == KXTF9)
str = kxtf9_samp_freq_avail;
else
str = kxcjk1013_samp_freq_avail;
return sprintf(buf, "%s\n", str);
}
static IIO_DEVICE_ATTR(in_accel_sampling_frequency_available, S_IRUGO,
kxcjk1013_get_samp_freq_avail, NULL, 0);
static IIO_CONST_ATTR(in_accel_scale_available, "0.009582 0.019163 0.038326");
static struct attribute *kxcjk1013_attributes[] = {
&iio_dev_attr_in_accel_sampling_frequency_available.dev_attr.attr,
&iio_const_attr_in_accel_scale_available.dev_attr.attr,
NULL,
};
static const struct attribute_group kxcjk1013_attrs_group = {
.attrs = kxcjk1013_attributes,
};
static const struct iio_event_spec kxcjk1013_event = {
.type = IIO_EV_TYPE_THRESH,
.dir = IIO_EV_DIR_EITHER,
.mask_separate = BIT(IIO_EV_INFO_VALUE) |
BIT(IIO_EV_INFO_ENABLE) |
BIT(IIO_EV_INFO_PERIOD)
};
#define KXCJK1013_CHANNEL(_axis) { \
.type = IIO_ACCEL, \
.modified = 1, \
.channel2 = IIO_MOD_##_axis, \
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
BIT(IIO_CHAN_INFO_SAMP_FREQ), \
.scan_index = AXIS_##_axis, \
.scan_type = { \
.sign = 's', \
.realbits = 12, \
.storagebits = 16, \
.shift = 4, \
.endianness = IIO_LE, \
}, \
.event_spec = &kxcjk1013_event, \
.num_event_specs = 1 \
}
static const struct iio_chan_spec kxcjk1013_channels[] = {
KXCJK1013_CHANNEL(X),
KXCJK1013_CHANNEL(Y),
KXCJK1013_CHANNEL(Z),
IIO_CHAN_SOFT_TIMESTAMP(3),
};
static const struct iio_buffer_setup_ops kxcjk1013_buffer_setup_ops = {
.preenable = kxcjk1013_buffer_preenable,
.postenable = iio_triggered_buffer_postenable,
.postdisable = kxcjk1013_buffer_postdisable,
.predisable = iio_triggered_buffer_predisable,
};
static const struct iio_info kxcjk1013_info = {
.attrs = &kxcjk1013_attrs_group,
.read_raw = kxcjk1013_read_raw,
.write_raw = kxcjk1013_write_raw,
.read_event_value = kxcjk1013_read_event,
.write_event_value = kxcjk1013_write_event,
.write_event_config = kxcjk1013_write_event_config,
.read_event_config = kxcjk1013_read_event_config,
};
static const unsigned long kxcjk1013_scan_masks[] = {0x7, 0};
static irqreturn_t kxcjk1013_trigger_handler(int irq, void *p)
{
struct iio_poll_func *pf = p;
struct iio_dev *indio_dev = pf->indio_dev;
struct kxcjk1013_data *data = iio_priv(indio_dev);
int ret;
mutex_lock(&data->mutex);
ret = i2c_smbus_read_i2c_block_data_or_emulated(data->client,
KXCJK1013_REG_XOUT_L,
AXIS_MAX * 2,
(u8 *)data->buffer);
mutex_unlock(&data->mutex);
if (ret < 0)
goto err;
iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
data->timestamp);
err:
iio_trigger_notify_done(indio_dev->trig);
return IRQ_HANDLED;
}
static int kxcjk1013_trig_try_reen(struct iio_trigger *trig)
{
struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
struct kxcjk1013_data *data = iio_priv(indio_dev);
int ret;
ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
if (ret < 0) {
dev_err(&data->client->dev, "Error reading reg_int_rel\n");
return ret;
}
return 0;
}
static int kxcjk1013_data_rdy_trigger_set_state(struct iio_trigger *trig,
bool state)
{
struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
struct kxcjk1013_data *data = iio_priv(indio_dev);
int ret;
mutex_lock(&data->mutex);
if (!state && data->ev_enable_state && data->motion_trigger_on) {
data->motion_trigger_on = false;
mutex_unlock(&data->mutex);
return 0;
}
ret = kxcjk1013_set_power_state(data, state);
if (ret < 0) {
mutex_unlock(&data->mutex);
return ret;
}
if (data->motion_trig == trig)
ret = kxcjk1013_setup_any_motion_interrupt(data, state);
else
ret = kxcjk1013_setup_new_data_interrupt(data, state);
if (ret < 0) {
kxcjk1013_set_power_state(data, false);
mutex_unlock(&data->mutex);
return ret;
}
if (data->motion_trig == trig)
data->motion_trigger_on = state;
else
data->dready_trigger_on = state;
mutex_unlock(&data->mutex);
return 0;
}
static const struct iio_trigger_ops kxcjk1013_trigger_ops = {
.set_trigger_state = kxcjk1013_data_rdy_trigger_set_state,
.try_reenable = kxcjk1013_trig_try_reen,
};
static void kxcjk1013_report_motion_event(struct iio_dev *indio_dev)
{
struct kxcjk1013_data *data = iio_priv(indio_dev);
int ret = i2c_smbus_read_byte_data(data->client,
KXCJK1013_REG_INT_SRC2);
if (ret < 0) {
dev_err(&data->client->dev, "Error reading reg_int_src2\n");
return;
}
if (ret & KXCJK1013_REG_INT_SRC2_BIT_XN)
iio_push_event(indio_dev,
IIO_MOD_EVENT_CODE(IIO_ACCEL,
0,
IIO_MOD_X,
IIO_EV_TYPE_THRESH,
IIO_EV_DIR_FALLING),
data->timestamp);
if (ret & KXCJK1013_REG_INT_SRC2_BIT_XP)
iio_push_event(indio_dev,
IIO_MOD_EVENT_CODE(IIO_ACCEL,
0,
IIO_MOD_X,
IIO_EV_TYPE_THRESH,
IIO_EV_DIR_RISING),
data->timestamp);
if (ret & KXCJK1013_REG_INT_SRC2_BIT_YN)
iio_push_event(indio_dev,
IIO_MOD_EVENT_CODE(IIO_ACCEL,
0,
IIO_MOD_Y,
IIO_EV_TYPE_THRESH,
IIO_EV_DIR_FALLING),
data->timestamp);
if (ret & KXCJK1013_REG_INT_SRC2_BIT_YP)
iio_push_event(indio_dev,
IIO_MOD_EVENT_CODE(IIO_ACCEL,
0,
IIO_MOD_Y,
IIO_EV_TYPE_THRESH,
IIO_EV_DIR_RISING),
data->timestamp);
if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZN)
iio_push_event(indio_dev,
IIO_MOD_EVENT_CODE(IIO_ACCEL,
0,
IIO_MOD_Z,
IIO_EV_TYPE_THRESH,
IIO_EV_DIR_FALLING),
data->timestamp);
if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZP)
iio_push_event(indio_dev,
IIO_MOD_EVENT_CODE(IIO_ACCEL,
0,
IIO_MOD_Z,
IIO_EV_TYPE_THRESH,
IIO_EV_DIR_RISING),
data->timestamp);
}
static irqreturn_t kxcjk1013_event_handler(int irq, void *private)
{
struct iio_dev *indio_dev = private;
struct kxcjk1013_data *data = iio_priv(indio_dev);
int ret;
ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_SRC1);
if (ret < 0) {
dev_err(&data->client->dev, "Error reading reg_int_src1\n");
goto ack_intr;
}
if (ret & KXCJK1013_REG_INT_SRC1_BIT_WUFS) {
if (data->chipset == KXTF9)
iio_push_event(indio_dev,
IIO_MOD_EVENT_CODE(IIO_ACCEL,
0,
IIO_MOD_X_AND_Y_AND_Z,
IIO_EV_TYPE_THRESH,
IIO_EV_DIR_RISING),
data->timestamp);
else
kxcjk1013_report_motion_event(indio_dev);
}
ack_intr:
if (data->dready_trigger_on)
return IRQ_HANDLED;
ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
if (ret < 0)
dev_err(&data->client->dev, "Error reading reg_int_rel\n");
return IRQ_HANDLED;
}
static irqreturn_t kxcjk1013_data_rdy_trig_poll(int irq, void *private)
{
struct iio_dev *indio_dev = private;
struct kxcjk1013_data *data = iio_priv(indio_dev);
data->timestamp = iio_get_time_ns(indio_dev);
if (data->dready_trigger_on)
iio_trigger_poll(data->dready_trig);
else if (data->motion_trigger_on)
iio_trigger_poll(data->motion_trig);
if (data->ev_enable_state)
return IRQ_WAKE_THREAD;
else
return IRQ_HANDLED;
}
static const char *kxcjk1013_match_acpi_device(struct device *dev,
enum kx_chipset *chipset,
bool *is_smo8500_device)
{
const struct acpi_device_id *id;
id = acpi_match_device(dev->driver->acpi_match_table, dev);
if (!id)
return NULL;
if (strcmp(id->id, "SMO8500") == 0)
*is_smo8500_device = true;
*chipset = (enum kx_chipset)id->driver_data;
return dev_name(dev);
}
static int kxcjk1013_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct kxcjk1013_data *data;
struct iio_dev *indio_dev;
struct kxcjk_1013_platform_data *pdata;
const char *name;
int ret;
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
if (!indio_dev)
return -ENOMEM;
data = iio_priv(indio_dev);
i2c_set_clientdata(client, indio_dev);
data->client = client;
pdata = dev_get_platdata(&client->dev);
if (pdata)
data->active_high_intr = pdata->active_high_intr;
else
data->active_high_intr = true; /* default polarity */
if (id) {
data->chipset = (enum kx_chipset)(id->driver_data);
name = id->name;
} else if (ACPI_HANDLE(&client->dev)) {
name = kxcjk1013_match_acpi_device(&client->dev,
&data->chipset,
&data->is_smo8500_device);
} else
return -ENODEV;
ret = kxcjk1013_chip_init(data);
if (ret < 0)
return ret;
mutex_init(&data->mutex);
indio_dev->dev.parent = &client->dev;
indio_dev->channels = kxcjk1013_channels;
indio_dev->num_channels = ARRAY_SIZE(kxcjk1013_channels);
indio_dev->available_scan_masks = kxcjk1013_scan_masks;
indio_dev->name = name;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->info = &kxcjk1013_info;
if (client->irq > 0 && !data->is_smo8500_device) {
ret = devm_request_threaded_irq(&client->dev, client->irq,
kxcjk1013_data_rdy_trig_poll,
kxcjk1013_event_handler,
IRQF_TRIGGER_RISING,
KXCJK1013_IRQ_NAME,
indio_dev);
if (ret)
goto err_poweroff;
data->dready_trig = devm_iio_trigger_alloc(&client->dev,
"%s-dev%d",
indio_dev->name,
indio_dev->id);
if (!data->dready_trig) {
ret = -ENOMEM;
goto err_poweroff;
}
data->motion_trig = devm_iio_trigger_alloc(&client->dev,
"%s-any-motion-dev%d",
indio_dev->name,
indio_dev->id);
if (!data->motion_trig) {
ret = -ENOMEM;
goto err_poweroff;
}
data->dready_trig->dev.parent = &client->dev;
data->dready_trig->ops = &kxcjk1013_trigger_ops;
iio_trigger_set_drvdata(data->dready_trig, indio_dev);
indio_dev->trig = data->dready_trig;
iio_trigger_get(indio_dev->trig);
ret = iio_trigger_register(data->dready_trig);
if (ret)
goto err_poweroff;
data->motion_trig->dev.parent = &client->dev;
data->motion_trig->ops = &kxcjk1013_trigger_ops;
iio_trigger_set_drvdata(data->motion_trig, indio_dev);
ret = iio_trigger_register(data->motion_trig);
if (ret) {
data->motion_trig = NULL;
goto err_trigger_unregister;
}
}
ret = iio_triggered_buffer_setup(indio_dev,
&iio_pollfunc_store_time,
kxcjk1013_trigger_handler,
&kxcjk1013_buffer_setup_ops);
if (ret < 0) {
dev_err(&client->dev, "iio triggered buffer setup failed\n");
goto err_trigger_unregister;
}
ret = pm_runtime_set_active(&client->dev);
if (ret)
goto err_buffer_cleanup;
pm_runtime_enable(&client->dev);
pm_runtime_set_autosuspend_delay(&client->dev,
KXCJK1013_SLEEP_DELAY_MS);
pm_runtime_use_autosuspend(&client->dev);
ret = iio_device_register(indio_dev);
if (ret < 0) {
dev_err(&client->dev, "unable to register iio device\n");
goto err_buffer_cleanup;
}
return 0;
err_buffer_cleanup:
if (data->dready_trig)
iio_triggered_buffer_cleanup(indio_dev);
err_trigger_unregister:
if (data->dready_trig)
iio_trigger_unregister(data->dready_trig);
if (data->motion_trig)
iio_trigger_unregister(data->motion_trig);
err_poweroff:
kxcjk1013_set_mode(data, STANDBY);
return ret;
}
static int kxcjk1013_remove(struct i2c_client *client)
{
struct iio_dev *indio_dev = i2c_get_clientdata(client);
struct kxcjk1013_data *data = iio_priv(indio_dev);
iio_device_unregister(indio_dev);
pm_runtime_disable(&client->dev);
pm_runtime_set_suspended(&client->dev);
pm_runtime_put_noidle(&client->dev);
if (data->dready_trig) {
iio_triggered_buffer_cleanup(indio_dev);
iio_trigger_unregister(data->dready_trig);
iio_trigger_unregister(data->motion_trig);
}
mutex_lock(&data->mutex);
kxcjk1013_set_mode(data, STANDBY);
mutex_unlock(&data->mutex);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int kxcjk1013_suspend(struct device *dev)
{
struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
struct kxcjk1013_data *data = iio_priv(indio_dev);
int ret;
mutex_lock(&data->mutex);
ret = kxcjk1013_set_mode(data, STANDBY);
mutex_unlock(&data->mutex);
return ret;
}
static int kxcjk1013_resume(struct device *dev)
{
struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
struct kxcjk1013_data *data = iio_priv(indio_dev);
int ret = 0;
mutex_lock(&data->mutex);
ret = kxcjk1013_set_mode(data, OPERATION);
mutex_unlock(&data->mutex);
return ret;
}
#endif
#ifdef CONFIG_PM
static int kxcjk1013_runtime_suspend(struct device *dev)
{
struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
struct kxcjk1013_data *data = iio_priv(indio_dev);
int ret;
ret = kxcjk1013_set_mode(data, STANDBY);
if (ret < 0) {
dev_err(&data->client->dev, "powering off device failed\n");
return -EAGAIN;
}
return 0;
}
static int kxcjk1013_runtime_resume(struct device *dev)
{
struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
struct kxcjk1013_data *data = iio_priv(indio_dev);
int ret;
int sleep_val;
ret = kxcjk1013_set_mode(data, OPERATION);
if (ret < 0)
return ret;
sleep_val = kxcjk1013_get_startup_times(data);
if (sleep_val < 20000)
usleep_range(sleep_val, 20000);
else
msleep_interruptible(sleep_val/1000);
return 0;
}
#endif
static const struct dev_pm_ops kxcjk1013_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(kxcjk1013_suspend, kxcjk1013_resume)
SET_RUNTIME_PM_OPS(kxcjk1013_runtime_suspend,
kxcjk1013_runtime_resume, NULL)
};
static const struct acpi_device_id kx_acpi_match[] = {
{"KXCJ1013", KXCJK1013},
{"KXCJ1008", KXCJ91008},
{"KXCJ9000", KXCJ91008},
{"KIOX000A", KXCJ91008},
{"KXTJ1009", KXTJ21009},
{"SMO8500", KXCJ91008},
{ },
};
MODULE_DEVICE_TABLE(acpi, kx_acpi_match);
static const struct i2c_device_id kxcjk1013_id[] = {
{"kxcjk1013", KXCJK1013},
{"kxcj91008", KXCJ91008},
{"kxtj21009", KXTJ21009},
{"kxtf9", KXTF9},
{"SMO8500", KXCJ91008},
{}
};
MODULE_DEVICE_TABLE(i2c, kxcjk1013_id);
static struct i2c_driver kxcjk1013_driver = {
.driver = {
.name = KXCJK1013_DRV_NAME,
.acpi_match_table = ACPI_PTR(kx_acpi_match),
.pm = &kxcjk1013_pm_ops,
},
.probe = kxcjk1013_probe,
.remove = kxcjk1013_remove,
.id_table = kxcjk1013_id,
};
module_i2c_driver(kxcjk1013_driver);
MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("KXCJK1013 accelerometer driver");
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