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1263 lines
32 KiB
1263 lines
32 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Freescale MMA9553L Intelligent Pedometer driver |
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* Copyright (c) 2014, Intel Corporation. |
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*/ |
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|
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#include <linux/module.h> |
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#include <linux/i2c.h> |
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#include <linux/interrupt.h> |
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#include <linux/slab.h> |
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#include <linux/acpi.h> |
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#include <linux/iio/iio.h> |
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#include <linux/iio/sysfs.h> |
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#include <linux/iio/events.h> |
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#include <linux/pm_runtime.h> |
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#include "mma9551_core.h" |
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#define MMA9553_DRV_NAME "mma9553" |
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#define MMA9553_IRQ_NAME "mma9553_event" |
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/* Pedometer configuration registers (R/W) */ |
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#define MMA9553_REG_CONF_SLEEPMIN 0x00 |
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#define MMA9553_REG_CONF_SLEEPMAX 0x02 |
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#define MMA9553_REG_CONF_SLEEPTHD 0x04 |
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#define MMA9553_MASK_CONF_WORD GENMASK(15, 0) |
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#define MMA9553_REG_CONF_CONF_STEPLEN 0x06 |
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#define MMA9553_MASK_CONF_CONFIG BIT(15) |
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#define MMA9553_MASK_CONF_ACT_DBCNTM BIT(14) |
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#define MMA9553_MASK_CONF_SLP_DBCNTM BIT(13) |
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#define MMA9553_MASK_CONF_STEPLEN GENMASK(7, 0) |
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#define MMA9553_REG_CONF_HEIGHT_WEIGHT 0x08 |
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#define MMA9553_MASK_CONF_HEIGHT GENMASK(15, 8) |
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#define MMA9553_MASK_CONF_WEIGHT GENMASK(7, 0) |
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#define MMA9553_REG_CONF_FILTER 0x0A |
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#define MMA9553_MASK_CONF_FILTSTEP GENMASK(15, 8) |
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#define MMA9553_MASK_CONF_MALE BIT(7) |
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#define MMA9553_MASK_CONF_FILTTIME GENMASK(6, 0) |
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#define MMA9553_REG_CONF_SPEED_STEP 0x0C |
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#define MMA9553_MASK_CONF_SPDPRD GENMASK(15, 8) |
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#define MMA9553_MASK_CONF_STEPCOALESCE GENMASK(7, 0) |
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#define MMA9553_REG_CONF_ACTTHD 0x0E |
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#define MMA9553_MAX_ACTTHD GENMASK(15, 0) |
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|
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/* Pedometer status registers (R-only) */ |
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#define MMA9553_REG_STATUS 0x00 |
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#define MMA9553_MASK_STATUS_MRGFL BIT(15) |
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#define MMA9553_MASK_STATUS_SUSPCHG BIT(14) |
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#define MMA9553_MASK_STATUS_STEPCHG BIT(13) |
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#define MMA9553_MASK_STATUS_ACTCHG BIT(12) |
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#define MMA9553_MASK_STATUS_SUSP BIT(11) |
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#define MMA9553_MASK_STATUS_ACTIVITY GENMASK(10, 8) |
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#define MMA9553_MASK_STATUS_VERSION GENMASK(7, 0) |
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#define MMA9553_REG_STEPCNT 0x02 |
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#define MMA9553_REG_DISTANCE 0x04 |
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#define MMA9553_REG_SPEED 0x06 |
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#define MMA9553_REG_CALORIES 0x08 |
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#define MMA9553_REG_SLEEPCNT 0x0A |
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/* Pedometer events are always mapped to this pin. */ |
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#define MMA9553_DEFAULT_GPIO_PIN mma9551_gpio6 |
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#define MMA9553_DEFAULT_GPIO_POLARITY 0 |
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/* Bitnum used for GPIO configuration = bit number in high status byte */ |
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#define MMA9553_STATUS_TO_BITNUM(bit) (ffs(bit) - 9) |
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#define MMA9553_MAX_BITNUM MMA9553_STATUS_TO_BITNUM(BIT(16)) |
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#define MMA9553_DEFAULT_SAMPLE_RATE 30 /* Hz */ |
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/* |
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* The internal activity level must be stable for ACTTHD samples before |
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* ACTIVITY is updated. The ACTIVITY variable contains the current activity |
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* level and is updated every time a step is detected or once a second |
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* if there are no steps. |
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*/ |
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#define MMA9553_ACTIVITY_THD_TO_SEC(thd) ((thd) / MMA9553_DEFAULT_SAMPLE_RATE) |
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#define MMA9553_ACTIVITY_SEC_TO_THD(sec) ((sec) * MMA9553_DEFAULT_SAMPLE_RATE) |
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/* |
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* Autonomously suspend pedometer if acceleration vector magnitude |
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* is near 1g (4096 at 0.244 mg/LSB resolution) for 30 seconds. |
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*/ |
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#define MMA9553_DEFAULT_SLEEPMIN 3688 /* 0,9 g */ |
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#define MMA9553_DEFAULT_SLEEPMAX 4508 /* 1,1 g */ |
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#define MMA9553_DEFAULT_SLEEPTHD (MMA9553_DEFAULT_SAMPLE_RATE * 30) |
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#define MMA9553_CONFIG_RETRIES 2 |
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/* Status register - activity field */ |
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enum activity_level { |
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ACTIVITY_UNKNOWN, |
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ACTIVITY_REST, |
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ACTIVITY_WALKING, |
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ACTIVITY_JOGGING, |
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ACTIVITY_RUNNING, |
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}; |
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static struct mma9553_event_info { |
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enum iio_chan_type type; |
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enum iio_modifier mod; |
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enum iio_event_direction dir; |
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} mma9553_events_info[] = { |
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{ |
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.type = IIO_STEPS, |
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.mod = IIO_NO_MOD, |
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.dir = IIO_EV_DIR_NONE, |
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}, |
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{ |
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.type = IIO_ACTIVITY, |
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.mod = IIO_MOD_STILL, |
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.dir = IIO_EV_DIR_RISING, |
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}, |
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{ |
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.type = IIO_ACTIVITY, |
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.mod = IIO_MOD_STILL, |
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.dir = IIO_EV_DIR_FALLING, |
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}, |
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{ |
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.type = IIO_ACTIVITY, |
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.mod = IIO_MOD_WALKING, |
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.dir = IIO_EV_DIR_RISING, |
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}, |
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{ |
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.type = IIO_ACTIVITY, |
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.mod = IIO_MOD_WALKING, |
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.dir = IIO_EV_DIR_FALLING, |
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}, |
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{ |
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.type = IIO_ACTIVITY, |
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.mod = IIO_MOD_JOGGING, |
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.dir = IIO_EV_DIR_RISING, |
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}, |
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{ |
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.type = IIO_ACTIVITY, |
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.mod = IIO_MOD_JOGGING, |
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.dir = IIO_EV_DIR_FALLING, |
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}, |
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{ |
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.type = IIO_ACTIVITY, |
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.mod = IIO_MOD_RUNNING, |
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.dir = IIO_EV_DIR_RISING, |
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}, |
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{ |
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.type = IIO_ACTIVITY, |
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.mod = IIO_MOD_RUNNING, |
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.dir = IIO_EV_DIR_FALLING, |
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}, |
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}; |
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#define MMA9553_EVENTS_INFO_SIZE ARRAY_SIZE(mma9553_events_info) |
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struct mma9553_event { |
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struct mma9553_event_info *info; |
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bool enabled; |
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}; |
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struct mma9553_conf_regs { |
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u16 sleepmin; |
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u16 sleepmax; |
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u16 sleepthd; |
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u16 config; |
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u16 height_weight; |
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u16 filter; |
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u16 speed_step; |
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u16 actthd; |
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} __packed; |
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struct mma9553_data { |
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struct i2c_client *client; |
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/* |
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* 1. Serialize access to HW (requested by mma9551_core API). |
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* 2. Serialize sequences that power on/off the device and access HW. |
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*/ |
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struct mutex mutex; |
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struct mma9553_conf_regs conf; |
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struct mma9553_event events[MMA9553_EVENTS_INFO_SIZE]; |
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int num_events; |
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u8 gpio_bitnum; |
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/* |
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* This is used for all features that depend on step count: |
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* step count, distance, speed, calories. |
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*/ |
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bool stepcnt_enabled; |
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u16 stepcnt; |
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u8 activity; |
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s64 timestamp; |
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}; |
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static u8 mma9553_get_bits(u16 val, u16 mask) |
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{ |
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return (val & mask) >> (ffs(mask) - 1); |
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} |
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static u16 mma9553_set_bits(u16 current_val, u16 val, u16 mask) |
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{ |
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return (current_val & ~mask) | (val << (ffs(mask) - 1)); |
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} |
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static enum iio_modifier mma9553_activity_to_mod(enum activity_level activity) |
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{ |
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switch (activity) { |
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case ACTIVITY_RUNNING: |
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return IIO_MOD_RUNNING; |
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case ACTIVITY_JOGGING: |
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return IIO_MOD_JOGGING; |
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case ACTIVITY_WALKING: |
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return IIO_MOD_WALKING; |
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case ACTIVITY_REST: |
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return IIO_MOD_STILL; |
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case ACTIVITY_UNKNOWN: |
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default: |
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return IIO_NO_MOD; |
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} |
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} |
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static void mma9553_init_events(struct mma9553_data *data) |
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{ |
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int i; |
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data->num_events = MMA9553_EVENTS_INFO_SIZE; |
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for (i = 0; i < data->num_events; i++) { |
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data->events[i].info = &mma9553_events_info[i]; |
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data->events[i].enabled = false; |
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} |
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} |
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static struct mma9553_event *mma9553_get_event(struct mma9553_data *data, |
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enum iio_chan_type type, |
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enum iio_modifier mod, |
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enum iio_event_direction dir) |
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{ |
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int i; |
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for (i = 0; i < data->num_events; i++) |
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if (data->events[i].info->type == type && |
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data->events[i].info->mod == mod && |
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data->events[i].info->dir == dir) |
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return &data->events[i]; |
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return NULL; |
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} |
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static bool mma9553_is_any_event_enabled(struct mma9553_data *data, |
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bool check_type, |
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enum iio_chan_type type) |
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{ |
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int i; |
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for (i = 0; i < data->num_events; i++) |
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if ((check_type && data->events[i].info->type == type && |
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data->events[i].enabled) || |
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(!check_type && data->events[i].enabled)) |
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return true; |
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return false; |
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} |
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static int mma9553_set_config(struct mma9553_data *data, u16 reg, |
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u16 *p_reg_val, u16 val, u16 mask) |
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{ |
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int ret, retries; |
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u16 reg_val, config; |
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reg_val = *p_reg_val; |
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if (val == mma9553_get_bits(reg_val, mask)) |
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return 0; |
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reg_val = mma9553_set_bits(reg_val, val, mask); |
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ret = mma9551_write_config_word(data->client, MMA9551_APPID_PEDOMETER, |
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reg, reg_val); |
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if (ret < 0) { |
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dev_err(&data->client->dev, |
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"error writing config register 0x%x\n", reg); |
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return ret; |
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} |
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*p_reg_val = reg_val; |
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/* Reinitializes the pedometer with current configuration values */ |
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config = mma9553_set_bits(data->conf.config, 1, |
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MMA9553_MASK_CONF_CONFIG); |
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ret = mma9551_write_config_word(data->client, MMA9551_APPID_PEDOMETER, |
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MMA9553_REG_CONF_CONF_STEPLEN, config); |
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if (ret < 0) { |
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dev_err(&data->client->dev, |
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"error writing config register 0x%x\n", |
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MMA9553_REG_CONF_CONF_STEPLEN); |
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return ret; |
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} |
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retries = MMA9553_CONFIG_RETRIES; |
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do { |
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mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE); |
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ret = mma9551_read_config_word(data->client, |
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MMA9551_APPID_PEDOMETER, |
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MMA9553_REG_CONF_CONF_STEPLEN, |
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&config); |
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if (ret < 0) |
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return ret; |
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} while (mma9553_get_bits(config, MMA9553_MASK_CONF_CONFIG) && |
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--retries > 0); |
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return 0; |
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} |
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static int mma9553_read_activity_stepcnt(struct mma9553_data *data, |
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u8 *activity, u16 *stepcnt) |
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{ |
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u16 buf[2]; |
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int ret; |
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ret = mma9551_read_status_words(data->client, MMA9551_APPID_PEDOMETER, |
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MMA9553_REG_STATUS, ARRAY_SIZE(buf), |
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buf); |
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if (ret < 0) { |
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dev_err(&data->client->dev, |
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"error reading status and stepcnt\n"); |
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return ret; |
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} |
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*activity = mma9553_get_bits(buf[0], MMA9553_MASK_STATUS_ACTIVITY); |
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*stepcnt = buf[1]; |
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return 0; |
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} |
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static int mma9553_conf_gpio(struct mma9553_data *data) |
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{ |
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u8 bitnum = 0, appid = MMA9551_APPID_PEDOMETER; |
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int ret; |
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struct mma9553_event *ev_step_detect; |
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bool activity_enabled; |
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activity_enabled = mma9553_is_any_event_enabled(data, true, |
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IIO_ACTIVITY); |
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ev_step_detect = mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD, |
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IIO_EV_DIR_NONE); |
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|
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/* |
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* If both step detector and activity are enabled, use the MRGFL bit. |
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* This bit is the logical OR of the SUSPCHG, STEPCHG, and ACTCHG flags. |
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*/ |
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if (activity_enabled && ev_step_detect->enabled) |
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bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_MRGFL); |
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else if (ev_step_detect->enabled) |
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bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_STEPCHG); |
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else if (activity_enabled) |
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bitnum = MMA9553_STATUS_TO_BITNUM(MMA9553_MASK_STATUS_ACTCHG); |
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else /* Reset */ |
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appid = MMA9551_APPID_NONE; |
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if (data->gpio_bitnum == bitnum) |
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return 0; |
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/* Save initial values for activity and stepcnt */ |
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if (activity_enabled || ev_step_detect->enabled) { |
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ret = mma9553_read_activity_stepcnt(data, &data->activity, |
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&data->stepcnt); |
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if (ret < 0) |
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return ret; |
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} |
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ret = mma9551_gpio_config(data->client, MMA9553_DEFAULT_GPIO_PIN, appid, |
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bitnum, MMA9553_DEFAULT_GPIO_POLARITY); |
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if (ret < 0) |
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return ret; |
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data->gpio_bitnum = bitnum; |
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return 0; |
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} |
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static int mma9553_init(struct mma9553_data *data) |
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{ |
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int ret; |
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ret = mma9551_read_version(data->client); |
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if (ret) |
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return ret; |
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/* |
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* Read all the pedometer configuration registers. This is used as |
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* a device identification command to differentiate the MMA9553L |
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* from the MMA9550L. |
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*/ |
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ret = mma9551_read_config_words(data->client, MMA9551_APPID_PEDOMETER, |
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MMA9553_REG_CONF_SLEEPMIN, |
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sizeof(data->conf) / sizeof(u16), |
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(u16 *)&data->conf); |
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if (ret < 0) { |
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dev_err(&data->client->dev, |
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"failed to read configuration registers\n"); |
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return ret; |
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} |
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|
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/* Reset GPIO */ |
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data->gpio_bitnum = MMA9553_MAX_BITNUM; |
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ret = mma9553_conf_gpio(data); |
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if (ret < 0) |
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return ret; |
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ret = mma9551_app_reset(data->client, MMA9551_RSC_PED); |
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if (ret < 0) |
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return ret; |
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|
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/* Init config registers */ |
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data->conf.sleepmin = MMA9553_DEFAULT_SLEEPMIN; |
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data->conf.sleepmax = MMA9553_DEFAULT_SLEEPMAX; |
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data->conf.sleepthd = MMA9553_DEFAULT_SLEEPTHD; |
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data->conf.config = mma9553_set_bits(data->conf.config, 1, |
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MMA9553_MASK_CONF_CONFIG); |
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/* |
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* Clear the activity debounce counter when the activity level changes, |
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* so that the confidence level applies for any activity level. |
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*/ |
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data->conf.config = mma9553_set_bits(data->conf.config, 1, |
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MMA9553_MASK_CONF_ACT_DBCNTM); |
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ret = mma9551_write_config_words(data->client, MMA9551_APPID_PEDOMETER, |
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MMA9553_REG_CONF_SLEEPMIN, |
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sizeof(data->conf) / sizeof(u16), |
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(u16 *)&data->conf); |
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if (ret < 0) { |
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dev_err(&data->client->dev, |
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"failed to write configuration registers\n"); |
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return ret; |
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} |
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|
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return mma9551_set_device_state(data->client, true); |
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} |
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static int mma9553_read_status_word(struct mma9553_data *data, u16 reg, |
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u16 *tmp) |
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{ |
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bool powered_on; |
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int ret; |
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|
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/* |
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* The HW only counts steps and other dependent |
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* parameters (speed, distance, calories, activity) |
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* if power is on (from enabling an event or the |
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* step counter). |
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*/ |
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powered_on = mma9553_is_any_event_enabled(data, false, 0) || |
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data->stepcnt_enabled; |
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if (!powered_on) { |
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dev_err(&data->client->dev, "No channels enabled\n"); |
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return -EINVAL; |
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} |
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|
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mutex_lock(&data->mutex); |
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ret = mma9551_read_status_word(data->client, MMA9551_APPID_PEDOMETER, |
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reg, tmp); |
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mutex_unlock(&data->mutex); |
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return ret; |
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} |
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|
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static int mma9553_read_raw(struct iio_dev *indio_dev, |
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struct iio_chan_spec const *chan, |
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int *val, int *val2, long mask) |
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{ |
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struct mma9553_data *data = iio_priv(indio_dev); |
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int ret; |
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u16 tmp; |
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u8 activity; |
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|
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switch (mask) { |
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case IIO_CHAN_INFO_PROCESSED: |
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switch (chan->type) { |
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case IIO_STEPS: |
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ret = mma9553_read_status_word(data, |
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MMA9553_REG_STEPCNT, |
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&tmp); |
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if (ret < 0) |
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return ret; |
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*val = tmp; |
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return IIO_VAL_INT; |
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case IIO_DISTANCE: |
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ret = mma9553_read_status_word(data, |
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MMA9553_REG_DISTANCE, |
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&tmp); |
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if (ret < 0) |
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return ret; |
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*val = tmp; |
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return IIO_VAL_INT; |
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case IIO_ACTIVITY: |
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ret = mma9553_read_status_word(data, |
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MMA9553_REG_STATUS, |
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&tmp); |
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if (ret < 0) |
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return ret; |
|
|
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activity = |
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mma9553_get_bits(tmp, MMA9553_MASK_STATUS_ACTIVITY); |
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|
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/* |
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* The device does not support confidence value levels, |
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* so we will always have 100% for current activity and |
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* 0% for the others. |
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*/ |
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if (chan->channel2 == mma9553_activity_to_mod(activity)) |
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*val = 100; |
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else |
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*val = 0; |
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return IIO_VAL_INT; |
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default: |
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return -EINVAL; |
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} |
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case IIO_CHAN_INFO_RAW: |
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switch (chan->type) { |
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case IIO_VELOCITY: /* m/h */ |
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if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z) |
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return -EINVAL; |
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ret = mma9553_read_status_word(data, |
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MMA9553_REG_SPEED, |
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&tmp); |
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if (ret < 0) |
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return ret; |
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*val = tmp; |
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return IIO_VAL_INT; |
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case IIO_ENERGY: /* Cal or kcal */ |
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ret = mma9553_read_status_word(data, |
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MMA9553_REG_CALORIES, |
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&tmp); |
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if (ret < 0) |
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return ret; |
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*val = tmp; |
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return IIO_VAL_INT; |
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case IIO_ACCEL: |
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mutex_lock(&data->mutex); |
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ret = mma9551_read_accel_chan(data->client, |
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chan, val, val2); |
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mutex_unlock(&data->mutex); |
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return ret; |
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default: |
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return -EINVAL; |
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} |
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case IIO_CHAN_INFO_SCALE: |
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switch (chan->type) { |
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case IIO_VELOCITY: /* m/h to m/s */ |
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if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z) |
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return -EINVAL; |
|
*val = 0; |
|
*val2 = 277; /* 0.000277 */ |
|
return IIO_VAL_INT_PLUS_MICRO; |
|
case IIO_ENERGY: /* Cal or kcal to J */ |
|
*val = 4184; |
|
return IIO_VAL_INT; |
|
case IIO_ACCEL: |
|
return mma9551_read_accel_scale(val, val2); |
|
default: |
|
return -EINVAL; |
|
} |
|
case IIO_CHAN_INFO_ENABLE: |
|
*val = data->stepcnt_enabled; |
|
return IIO_VAL_INT; |
|
case IIO_CHAN_INFO_CALIBHEIGHT: |
|
tmp = mma9553_get_bits(data->conf.height_weight, |
|
MMA9553_MASK_CONF_HEIGHT); |
|
*val = tmp / 100; /* cm to m */ |
|
*val2 = (tmp % 100) * 10000; |
|
return IIO_VAL_INT_PLUS_MICRO; |
|
case IIO_CHAN_INFO_CALIBWEIGHT: |
|
*val = mma9553_get_bits(data->conf.height_weight, |
|
MMA9553_MASK_CONF_WEIGHT); |
|
return IIO_VAL_INT; |
|
case IIO_CHAN_INFO_DEBOUNCE_COUNT: |
|
switch (chan->type) { |
|
case IIO_STEPS: |
|
*val = mma9553_get_bits(data->conf.filter, |
|
MMA9553_MASK_CONF_FILTSTEP); |
|
return IIO_VAL_INT; |
|
default: |
|
return -EINVAL; |
|
} |
|
case IIO_CHAN_INFO_DEBOUNCE_TIME: |
|
switch (chan->type) { |
|
case IIO_STEPS: |
|
*val = mma9553_get_bits(data->conf.filter, |
|
MMA9553_MASK_CONF_FILTTIME); |
|
return IIO_VAL_INT; |
|
default: |
|
return -EINVAL; |
|
} |
|
case IIO_CHAN_INFO_INT_TIME: |
|
switch (chan->type) { |
|
case IIO_VELOCITY: |
|
if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z) |
|
return -EINVAL; |
|
*val = mma9553_get_bits(data->conf.speed_step, |
|
MMA9553_MASK_CONF_SPDPRD); |
|
return IIO_VAL_INT; |
|
default: |
|
return -EINVAL; |
|
} |
|
default: |
|
return -EINVAL; |
|
} |
|
} |
|
|
|
static int mma9553_write_raw(struct iio_dev *indio_dev, |
|
struct iio_chan_spec const *chan, |
|
int val, int val2, long mask) |
|
{ |
|
struct mma9553_data *data = iio_priv(indio_dev); |
|
int ret, tmp; |
|
|
|
switch (mask) { |
|
case IIO_CHAN_INFO_ENABLE: |
|
if (data->stepcnt_enabled == !!val) |
|
return 0; |
|
mutex_lock(&data->mutex); |
|
ret = mma9551_set_power_state(data->client, val); |
|
if (ret < 0) { |
|
mutex_unlock(&data->mutex); |
|
return ret; |
|
} |
|
data->stepcnt_enabled = val; |
|
mutex_unlock(&data->mutex); |
|
return 0; |
|
case IIO_CHAN_INFO_CALIBHEIGHT: |
|
/* m to cm */ |
|
tmp = val * 100 + val2 / 10000; |
|
if (tmp < 0 || tmp > 255) |
|
return -EINVAL; |
|
mutex_lock(&data->mutex); |
|
ret = mma9553_set_config(data, |
|
MMA9553_REG_CONF_HEIGHT_WEIGHT, |
|
&data->conf.height_weight, |
|
tmp, MMA9553_MASK_CONF_HEIGHT); |
|
mutex_unlock(&data->mutex); |
|
return ret; |
|
case IIO_CHAN_INFO_CALIBWEIGHT: |
|
if (val < 0 || val > 255) |
|
return -EINVAL; |
|
mutex_lock(&data->mutex); |
|
ret = mma9553_set_config(data, |
|
MMA9553_REG_CONF_HEIGHT_WEIGHT, |
|
&data->conf.height_weight, |
|
val, MMA9553_MASK_CONF_WEIGHT); |
|
mutex_unlock(&data->mutex); |
|
return ret; |
|
case IIO_CHAN_INFO_DEBOUNCE_COUNT: |
|
switch (chan->type) { |
|
case IIO_STEPS: |
|
/* |
|
* Set to 0 to disable step filtering. If the value |
|
* specified is greater than 6, then 6 will be used. |
|
*/ |
|
if (val < 0) |
|
return -EINVAL; |
|
if (val > 6) |
|
val = 6; |
|
mutex_lock(&data->mutex); |
|
ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER, |
|
&data->conf.filter, val, |
|
MMA9553_MASK_CONF_FILTSTEP); |
|
mutex_unlock(&data->mutex); |
|
return ret; |
|
default: |
|
return -EINVAL; |
|
} |
|
case IIO_CHAN_INFO_DEBOUNCE_TIME: |
|
switch (chan->type) { |
|
case IIO_STEPS: |
|
if (val < 0 || val > 127) |
|
return -EINVAL; |
|
mutex_lock(&data->mutex); |
|
ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER, |
|
&data->conf.filter, val, |
|
MMA9553_MASK_CONF_FILTTIME); |
|
mutex_unlock(&data->mutex); |
|
return ret; |
|
default: |
|
return -EINVAL; |
|
} |
|
case IIO_CHAN_INFO_INT_TIME: |
|
switch (chan->type) { |
|
case IIO_VELOCITY: |
|
if (chan->channel2 != IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z) |
|
return -EINVAL; |
|
/* |
|
* If set to a value greater than 5, then 5 will be |
|
* used. Warning: Do not set SPDPRD to 0 or 1 as |
|
* this may cause undesirable behavior. |
|
*/ |
|
if (val < 2) |
|
return -EINVAL; |
|
if (val > 5) |
|
val = 5; |
|
mutex_lock(&data->mutex); |
|
ret = mma9553_set_config(data, |
|
MMA9553_REG_CONF_SPEED_STEP, |
|
&data->conf.speed_step, val, |
|
MMA9553_MASK_CONF_SPDPRD); |
|
mutex_unlock(&data->mutex); |
|
return ret; |
|
default: |
|
return -EINVAL; |
|
} |
|
default: |
|
return -EINVAL; |
|
} |
|
} |
|
|
|
static int mma9553_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 mma9553_data *data = iio_priv(indio_dev); |
|
struct mma9553_event *event; |
|
|
|
event = mma9553_get_event(data, chan->type, chan->channel2, dir); |
|
if (!event) |
|
return -EINVAL; |
|
|
|
return event->enabled; |
|
} |
|
|
|
static int mma9553_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 mma9553_data *data = iio_priv(indio_dev); |
|
struct mma9553_event *event; |
|
int ret; |
|
|
|
event = mma9553_get_event(data, chan->type, chan->channel2, dir); |
|
if (!event) |
|
return -EINVAL; |
|
|
|
if (event->enabled == state) |
|
return 0; |
|
|
|
mutex_lock(&data->mutex); |
|
|
|
ret = mma9551_set_power_state(data->client, state); |
|
if (ret < 0) |
|
goto err_out; |
|
event->enabled = state; |
|
|
|
ret = mma9553_conf_gpio(data); |
|
if (ret < 0) |
|
goto err_conf_gpio; |
|
|
|
mutex_unlock(&data->mutex); |
|
|
|
return 0; |
|
|
|
err_conf_gpio: |
|
if (state) { |
|
event->enabled = false; |
|
mma9551_set_power_state(data->client, false); |
|
} |
|
err_out: |
|
mutex_unlock(&data->mutex); |
|
return ret; |
|
} |
|
|
|
static int mma9553_read_event_value(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 mma9553_data *data = iio_priv(indio_dev); |
|
|
|
*val2 = 0; |
|
switch (info) { |
|
case IIO_EV_INFO_VALUE: |
|
switch (chan->type) { |
|
case IIO_STEPS: |
|
*val = mma9553_get_bits(data->conf.speed_step, |
|
MMA9553_MASK_CONF_STEPCOALESCE); |
|
return IIO_VAL_INT; |
|
case IIO_ACTIVITY: |
|
/* |
|
* The device does not support confidence value levels. |
|
* We set an average of 50%. |
|
*/ |
|
*val = 50; |
|
return IIO_VAL_INT; |
|
default: |
|
return -EINVAL; |
|
} |
|
case IIO_EV_INFO_PERIOD: |
|
switch (chan->type) { |
|
case IIO_ACTIVITY: |
|
*val = MMA9553_ACTIVITY_THD_TO_SEC(data->conf.actthd); |
|
return IIO_VAL_INT; |
|
default: |
|
return -EINVAL; |
|
} |
|
default: |
|
return -EINVAL; |
|
} |
|
} |
|
|
|
static int mma9553_write_event_value(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 mma9553_data *data = iio_priv(indio_dev); |
|
int ret; |
|
|
|
switch (info) { |
|
case IIO_EV_INFO_VALUE: |
|
switch (chan->type) { |
|
case IIO_STEPS: |
|
if (val < 0 || val > 255) |
|
return -EINVAL; |
|
mutex_lock(&data->mutex); |
|
ret = mma9553_set_config(data, |
|
MMA9553_REG_CONF_SPEED_STEP, |
|
&data->conf.speed_step, val, |
|
MMA9553_MASK_CONF_STEPCOALESCE); |
|
mutex_unlock(&data->mutex); |
|
return ret; |
|
default: |
|
return -EINVAL; |
|
} |
|
case IIO_EV_INFO_PERIOD: |
|
switch (chan->type) { |
|
case IIO_ACTIVITY: |
|
if (val < 0 || val > MMA9553_ACTIVITY_THD_TO_SEC( |
|
MMA9553_MAX_ACTTHD)) |
|
return -EINVAL; |
|
mutex_lock(&data->mutex); |
|
ret = mma9553_set_config(data, MMA9553_REG_CONF_ACTTHD, |
|
&data->conf.actthd, |
|
MMA9553_ACTIVITY_SEC_TO_THD |
|
(val), MMA9553_MASK_CONF_WORD); |
|
mutex_unlock(&data->mutex); |
|
return ret; |
|
default: |
|
return -EINVAL; |
|
} |
|
default: |
|
return -EINVAL; |
|
} |
|
} |
|
|
|
static int mma9553_get_calibgender_mode(struct iio_dev *indio_dev, |
|
const struct iio_chan_spec *chan) |
|
{ |
|
struct mma9553_data *data = iio_priv(indio_dev); |
|
u8 gender; |
|
|
|
gender = mma9553_get_bits(data->conf.filter, MMA9553_MASK_CONF_MALE); |
|
/* |
|
* HW expects 0 for female and 1 for male, |
|
* while iio index is 0 for male and 1 for female. |
|
*/ |
|
return !gender; |
|
} |
|
|
|
static int mma9553_set_calibgender_mode(struct iio_dev *indio_dev, |
|
const struct iio_chan_spec *chan, |
|
unsigned int mode) |
|
{ |
|
struct mma9553_data *data = iio_priv(indio_dev); |
|
u8 gender = !mode; |
|
int ret; |
|
|
|
if ((mode != 0) && (mode != 1)) |
|
return -EINVAL; |
|
mutex_lock(&data->mutex); |
|
ret = mma9553_set_config(data, MMA9553_REG_CONF_FILTER, |
|
&data->conf.filter, gender, |
|
MMA9553_MASK_CONF_MALE); |
|
mutex_unlock(&data->mutex); |
|
|
|
return ret; |
|
} |
|
|
|
static const struct iio_event_spec mma9553_step_event = { |
|
.type = IIO_EV_TYPE_CHANGE, |
|
.dir = IIO_EV_DIR_NONE, |
|
.mask_separate = BIT(IIO_EV_INFO_ENABLE) | BIT(IIO_EV_INFO_VALUE), |
|
}; |
|
|
|
static const struct iio_event_spec mma9553_activity_events[] = { |
|
{ |
|
.type = IIO_EV_TYPE_THRESH, |
|
.dir = IIO_EV_DIR_RISING, |
|
.mask_separate = BIT(IIO_EV_INFO_ENABLE) | |
|
BIT(IIO_EV_INFO_VALUE) | |
|
BIT(IIO_EV_INFO_PERIOD), |
|
}, |
|
{ |
|
.type = IIO_EV_TYPE_THRESH, |
|
.dir = IIO_EV_DIR_FALLING, |
|
.mask_separate = BIT(IIO_EV_INFO_ENABLE) | |
|
BIT(IIO_EV_INFO_VALUE) | |
|
BIT(IIO_EV_INFO_PERIOD), |
|
}, |
|
}; |
|
|
|
static const char * const mma9553_calibgender_modes[] = { "male", "female" }; |
|
|
|
static const struct iio_enum mma9553_calibgender_enum = { |
|
.items = mma9553_calibgender_modes, |
|
.num_items = ARRAY_SIZE(mma9553_calibgender_modes), |
|
.get = mma9553_get_calibgender_mode, |
|
.set = mma9553_set_calibgender_mode, |
|
}; |
|
|
|
static const struct iio_chan_spec_ext_info mma9553_ext_info[] = { |
|
IIO_ENUM("calibgender", IIO_SHARED_BY_TYPE, &mma9553_calibgender_enum), |
|
IIO_ENUM_AVAILABLE("calibgender", &mma9553_calibgender_enum), |
|
{}, |
|
}; |
|
|
|
#define MMA9553_PEDOMETER_CHANNEL(_type, _mask) { \ |
|
.type = _type, \ |
|
.info_mask_separate = BIT(IIO_CHAN_INFO_ENABLE) | \ |
|
BIT(IIO_CHAN_INFO_CALIBHEIGHT) | \ |
|
_mask, \ |
|
.ext_info = mma9553_ext_info, \ |
|
} |
|
|
|
#define MMA9553_ACTIVITY_CHANNEL(_chan2) { \ |
|
.type = IIO_ACTIVITY, \ |
|
.modified = 1, \ |
|
.channel2 = _chan2, \ |
|
.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), \ |
|
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBHEIGHT) | \ |
|
BIT(IIO_CHAN_INFO_ENABLE), \ |
|
.event_spec = mma9553_activity_events, \ |
|
.num_event_specs = ARRAY_SIZE(mma9553_activity_events), \ |
|
.ext_info = mma9553_ext_info, \ |
|
} |
|
|
|
static const struct iio_chan_spec mma9553_channels[] = { |
|
MMA9551_ACCEL_CHANNEL(IIO_MOD_X), |
|
MMA9551_ACCEL_CHANNEL(IIO_MOD_Y), |
|
MMA9551_ACCEL_CHANNEL(IIO_MOD_Z), |
|
|
|
{ |
|
.type = IIO_STEPS, |
|
.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | |
|
BIT(IIO_CHAN_INFO_ENABLE) | |
|
BIT(IIO_CHAN_INFO_DEBOUNCE_COUNT) | |
|
BIT(IIO_CHAN_INFO_DEBOUNCE_TIME), |
|
.event_spec = &mma9553_step_event, |
|
.num_event_specs = 1, |
|
}, |
|
|
|
MMA9553_PEDOMETER_CHANNEL(IIO_DISTANCE, BIT(IIO_CHAN_INFO_PROCESSED)), |
|
{ |
|
.type = IIO_VELOCITY, |
|
.modified = 1, |
|
.channel2 = IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z, |
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | |
|
BIT(IIO_CHAN_INFO_SCALE) | |
|
BIT(IIO_CHAN_INFO_INT_TIME) | |
|
BIT(IIO_CHAN_INFO_ENABLE), |
|
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBHEIGHT), |
|
.ext_info = mma9553_ext_info, |
|
}, |
|
MMA9553_PEDOMETER_CHANNEL(IIO_ENERGY, BIT(IIO_CHAN_INFO_RAW) | |
|
BIT(IIO_CHAN_INFO_SCALE) | |
|
BIT(IIO_CHAN_INFO_CALIBWEIGHT)), |
|
|
|
MMA9553_ACTIVITY_CHANNEL(IIO_MOD_RUNNING), |
|
MMA9553_ACTIVITY_CHANNEL(IIO_MOD_JOGGING), |
|
MMA9553_ACTIVITY_CHANNEL(IIO_MOD_WALKING), |
|
MMA9553_ACTIVITY_CHANNEL(IIO_MOD_STILL), |
|
}; |
|
|
|
static const struct iio_info mma9553_info = { |
|
.read_raw = mma9553_read_raw, |
|
.write_raw = mma9553_write_raw, |
|
.read_event_config = mma9553_read_event_config, |
|
.write_event_config = mma9553_write_event_config, |
|
.read_event_value = mma9553_read_event_value, |
|
.write_event_value = mma9553_write_event_value, |
|
}; |
|
|
|
static irqreturn_t mma9553_irq_handler(int irq, void *private) |
|
{ |
|
struct iio_dev *indio_dev = private; |
|
struct mma9553_data *data = iio_priv(indio_dev); |
|
|
|
data->timestamp = iio_get_time_ns(indio_dev); |
|
/* |
|
* Since we only configure the interrupt pin when an |
|
* event is enabled, we are sure we have at least |
|
* one event enabled at this point. |
|
*/ |
|
return IRQ_WAKE_THREAD; |
|
} |
|
|
|
static irqreturn_t mma9553_event_handler(int irq, void *private) |
|
{ |
|
struct iio_dev *indio_dev = private; |
|
struct mma9553_data *data = iio_priv(indio_dev); |
|
u16 stepcnt; |
|
u8 activity; |
|
struct mma9553_event *ev_activity, *ev_prev_activity, *ev_step_detect; |
|
int ret; |
|
|
|
mutex_lock(&data->mutex); |
|
ret = mma9553_read_activity_stepcnt(data, &activity, &stepcnt); |
|
if (ret < 0) { |
|
mutex_unlock(&data->mutex); |
|
return IRQ_HANDLED; |
|
} |
|
|
|
ev_prev_activity = mma9553_get_event(data, IIO_ACTIVITY, |
|
mma9553_activity_to_mod( |
|
data->activity), |
|
IIO_EV_DIR_FALLING); |
|
ev_activity = mma9553_get_event(data, IIO_ACTIVITY, |
|
mma9553_activity_to_mod(activity), |
|
IIO_EV_DIR_RISING); |
|
ev_step_detect = mma9553_get_event(data, IIO_STEPS, IIO_NO_MOD, |
|
IIO_EV_DIR_NONE); |
|
|
|
if (ev_step_detect->enabled && (stepcnt != data->stepcnt)) { |
|
data->stepcnt = stepcnt; |
|
iio_push_event(indio_dev, |
|
IIO_EVENT_CODE(IIO_STEPS, 0, IIO_NO_MOD, |
|
IIO_EV_DIR_NONE, |
|
IIO_EV_TYPE_CHANGE, 0, 0, 0), |
|
data->timestamp); |
|
} |
|
|
|
if (activity != data->activity) { |
|
data->activity = activity; |
|
/* ev_activity can be NULL if activity == ACTIVITY_UNKNOWN */ |
|
if (ev_prev_activity && ev_prev_activity->enabled) |
|
iio_push_event(indio_dev, |
|
IIO_EVENT_CODE(IIO_ACTIVITY, 0, |
|
ev_prev_activity->info->mod, |
|
IIO_EV_DIR_FALLING, |
|
IIO_EV_TYPE_THRESH, 0, 0, |
|
0), |
|
data->timestamp); |
|
|
|
if (ev_activity && ev_activity->enabled) |
|
iio_push_event(indio_dev, |
|
IIO_EVENT_CODE(IIO_ACTIVITY, 0, |
|
ev_activity->info->mod, |
|
IIO_EV_DIR_RISING, |
|
IIO_EV_TYPE_THRESH, 0, 0, |
|
0), |
|
data->timestamp); |
|
} |
|
mutex_unlock(&data->mutex); |
|
|
|
return IRQ_HANDLED; |
|
} |
|
|
|
static const char *mma9553_match_acpi_device(struct device *dev) |
|
{ |
|
const struct acpi_device_id *id; |
|
|
|
id = acpi_match_device(dev->driver->acpi_match_table, dev); |
|
if (!id) |
|
return NULL; |
|
|
|
return dev_name(dev); |
|
} |
|
|
|
static int mma9553_probe(struct i2c_client *client, |
|
const struct i2c_device_id *id) |
|
{ |
|
struct mma9553_data *data; |
|
struct iio_dev *indio_dev; |
|
const char *name = NULL; |
|
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; |
|
|
|
if (id) |
|
name = id->name; |
|
else if (ACPI_HANDLE(&client->dev)) |
|
name = mma9553_match_acpi_device(&client->dev); |
|
else |
|
return -ENOSYS; |
|
|
|
mutex_init(&data->mutex); |
|
mma9553_init_events(data); |
|
|
|
ret = mma9553_init(data); |
|
if (ret < 0) |
|
return ret; |
|
|
|
indio_dev->channels = mma9553_channels; |
|
indio_dev->num_channels = ARRAY_SIZE(mma9553_channels); |
|
indio_dev->name = name; |
|
indio_dev->modes = INDIO_DIRECT_MODE; |
|
indio_dev->info = &mma9553_info; |
|
|
|
if (client->irq > 0) { |
|
ret = devm_request_threaded_irq(&client->dev, client->irq, |
|
mma9553_irq_handler, |
|
mma9553_event_handler, |
|
IRQF_TRIGGER_RISING, |
|
MMA9553_IRQ_NAME, indio_dev); |
|
if (ret < 0) { |
|
dev_err(&client->dev, "request irq %d failed\n", |
|
client->irq); |
|
goto out_poweroff; |
|
} |
|
} |
|
|
|
ret = pm_runtime_set_active(&client->dev); |
|
if (ret < 0) |
|
goto out_poweroff; |
|
|
|
pm_runtime_enable(&client->dev); |
|
pm_runtime_set_autosuspend_delay(&client->dev, |
|
MMA9551_AUTO_SUSPEND_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 out_poweroff; |
|
} |
|
|
|
dev_dbg(&indio_dev->dev, "Registered device %s\n", name); |
|
return 0; |
|
|
|
out_poweroff: |
|
mma9551_set_device_state(client, false); |
|
return ret; |
|
} |
|
|
|
static int mma9553_remove(struct i2c_client *client) |
|
{ |
|
struct iio_dev *indio_dev = i2c_get_clientdata(client); |
|
struct mma9553_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); |
|
|
|
mutex_lock(&data->mutex); |
|
mma9551_set_device_state(data->client, false); |
|
mutex_unlock(&data->mutex); |
|
|
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_PM |
|
static int mma9553_runtime_suspend(struct device *dev) |
|
{ |
|
struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); |
|
struct mma9553_data *data = iio_priv(indio_dev); |
|
int ret; |
|
|
|
mutex_lock(&data->mutex); |
|
ret = mma9551_set_device_state(data->client, false); |
|
mutex_unlock(&data->mutex); |
|
if (ret < 0) { |
|
dev_err(&data->client->dev, "powering off device failed\n"); |
|
return -EAGAIN; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int mma9553_runtime_resume(struct device *dev) |
|
{ |
|
struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); |
|
struct mma9553_data *data = iio_priv(indio_dev); |
|
int ret; |
|
|
|
ret = mma9551_set_device_state(data->client, true); |
|
if (ret < 0) |
|
return ret; |
|
|
|
mma9551_sleep(MMA9553_DEFAULT_SAMPLE_RATE); |
|
|
|
return 0; |
|
} |
|
#endif |
|
|
|
#ifdef CONFIG_PM_SLEEP |
|
static int mma9553_suspend(struct device *dev) |
|
{ |
|
struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); |
|
struct mma9553_data *data = iio_priv(indio_dev); |
|
int ret; |
|
|
|
mutex_lock(&data->mutex); |
|
ret = mma9551_set_device_state(data->client, false); |
|
mutex_unlock(&data->mutex); |
|
|
|
return ret; |
|
} |
|
|
|
static int mma9553_resume(struct device *dev) |
|
{ |
|
struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); |
|
struct mma9553_data *data = iio_priv(indio_dev); |
|
int ret; |
|
|
|
mutex_lock(&data->mutex); |
|
ret = mma9551_set_device_state(data->client, true); |
|
mutex_unlock(&data->mutex); |
|
|
|
return ret; |
|
} |
|
#endif |
|
|
|
static const struct dev_pm_ops mma9553_pm_ops = { |
|
SET_SYSTEM_SLEEP_PM_OPS(mma9553_suspend, mma9553_resume) |
|
SET_RUNTIME_PM_OPS(mma9553_runtime_suspend, |
|
mma9553_runtime_resume, NULL) |
|
}; |
|
|
|
static const struct acpi_device_id mma9553_acpi_match[] = { |
|
{"MMA9553", 0}, |
|
{}, |
|
}; |
|
|
|
MODULE_DEVICE_TABLE(acpi, mma9553_acpi_match); |
|
|
|
static const struct i2c_device_id mma9553_id[] = { |
|
{"mma9553", 0}, |
|
{}, |
|
}; |
|
|
|
MODULE_DEVICE_TABLE(i2c, mma9553_id); |
|
|
|
static struct i2c_driver mma9553_driver = { |
|
.driver = { |
|
.name = MMA9553_DRV_NAME, |
|
.acpi_match_table = ACPI_PTR(mma9553_acpi_match), |
|
.pm = &mma9553_pm_ops, |
|
}, |
|
.probe = mma9553_probe, |
|
.remove = mma9553_remove, |
|
.id_table = mma9553_id, |
|
}; |
|
|
|
module_i2c_driver(mma9553_driver); |
|
|
|
MODULE_AUTHOR("Irina Tirdea <[email protected]>"); |
|
MODULE_LICENSE("GPL v2"); |
|
MODULE_DESCRIPTION("MMA9553L pedometer platform driver");
|
|
|