// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2011 Bosch Sensortec GmbH
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* Copyright (c) 2011 Unixphere
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*
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* This driver adds support for Bosch Sensortec's digital acceleration
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* sensors BMA150 and SMB380.
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* The SMB380 is fully compatible with BMA150 and only differs in packaging.
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*
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* The datasheet for the BMA150 chip can be found here:
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* http://www.bosch-sensortec.com/content/language1/downloads/BST-BMA150-DS000-07.pdf
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/i2c.h>
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#include <linux/input.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/pm.h>
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#include <linux/pm_runtime.h>
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#include <linux/bma150.h>
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#define ABSMAX_ACC_VAL 0x01FF
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#define ABSMIN_ACC_VAL -(ABSMAX_ACC_VAL)
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/* Each axis is represented by a 2-byte data word */
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#define BMA150_XYZ_DATA_SIZE 6
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/* Input poll interval in milliseconds */
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#define BMA150_POLL_INTERVAL 10
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#define BMA150_POLL_MAX 200
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#define BMA150_POLL_MIN 0
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#define BMA150_MODE_NORMAL 0
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#define BMA150_MODE_SLEEP 2
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#define BMA150_MODE_WAKE_UP 3
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/* Data register addresses */
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#define BMA150_DATA_0_REG 0x00
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#define BMA150_DATA_1_REG 0x01
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#define BMA150_DATA_2_REG 0x02
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/* Control register addresses */
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#define BMA150_CTRL_0_REG 0x0A
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#define BMA150_CTRL_1_REG 0x0B
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#define BMA150_CTRL_2_REG 0x14
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#define BMA150_CTRL_3_REG 0x15
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/* Configuration/Setting register addresses */
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#define BMA150_CFG_0_REG 0x0C
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#define BMA150_CFG_1_REG 0x0D
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#define BMA150_CFG_2_REG 0x0E
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#define BMA150_CFG_3_REG 0x0F
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#define BMA150_CFG_4_REG 0x10
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#define BMA150_CFG_5_REG 0x11
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#define BMA150_CHIP_ID 2
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#define BMA150_CHIP_ID_REG BMA150_DATA_0_REG
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#define BMA150_ACC_X_LSB_REG BMA150_DATA_2_REG
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#define BMA150_SLEEP_POS 0
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#define BMA150_SLEEP_MSK 0x01
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#define BMA150_SLEEP_REG BMA150_CTRL_0_REG
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#define BMA150_BANDWIDTH_POS 0
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#define BMA150_BANDWIDTH_MSK 0x07
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#define BMA150_BANDWIDTH_REG BMA150_CTRL_2_REG
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#define BMA150_RANGE_POS 3
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#define BMA150_RANGE_MSK 0x18
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#define BMA150_RANGE_REG BMA150_CTRL_2_REG
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#define BMA150_WAKE_UP_POS 0
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#define BMA150_WAKE_UP_MSK 0x01
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#define BMA150_WAKE_UP_REG BMA150_CTRL_3_REG
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#define BMA150_SW_RES_POS 1
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#define BMA150_SW_RES_MSK 0x02
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#define BMA150_SW_RES_REG BMA150_CTRL_0_REG
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/* Any-motion interrupt register fields */
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#define BMA150_ANY_MOTION_EN_POS 6
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#define BMA150_ANY_MOTION_EN_MSK 0x40
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#define BMA150_ANY_MOTION_EN_REG BMA150_CTRL_1_REG
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#define BMA150_ANY_MOTION_DUR_POS 6
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#define BMA150_ANY_MOTION_DUR_MSK 0xC0
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#define BMA150_ANY_MOTION_DUR_REG BMA150_CFG_5_REG
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#define BMA150_ANY_MOTION_THRES_REG BMA150_CFG_4_REG
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/* Advanced interrupt register fields */
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#define BMA150_ADV_INT_EN_POS 6
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#define BMA150_ADV_INT_EN_MSK 0x40
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#define BMA150_ADV_INT_EN_REG BMA150_CTRL_3_REG
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/* High-G interrupt register fields */
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#define BMA150_HIGH_G_EN_POS 1
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#define BMA150_HIGH_G_EN_MSK 0x02
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#define BMA150_HIGH_G_EN_REG BMA150_CTRL_1_REG
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#define BMA150_HIGH_G_HYST_POS 3
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#define BMA150_HIGH_G_HYST_MSK 0x38
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#define BMA150_HIGH_G_HYST_REG BMA150_CFG_5_REG
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#define BMA150_HIGH_G_DUR_REG BMA150_CFG_3_REG
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#define BMA150_HIGH_G_THRES_REG BMA150_CFG_2_REG
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/* Low-G interrupt register fields */
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#define BMA150_LOW_G_EN_POS 0
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#define BMA150_LOW_G_EN_MSK 0x01
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#define BMA150_LOW_G_EN_REG BMA150_CTRL_1_REG
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#define BMA150_LOW_G_HYST_POS 0
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#define BMA150_LOW_G_HYST_MSK 0x07
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#define BMA150_LOW_G_HYST_REG BMA150_CFG_5_REG
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#define BMA150_LOW_G_DUR_REG BMA150_CFG_1_REG
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#define BMA150_LOW_G_THRES_REG BMA150_CFG_0_REG
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struct bma150_data {
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struct i2c_client *client;
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struct input_dev *input;
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u8 mode;
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};
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/*
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* The settings for the given range, bandwidth and interrupt features
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* are stated and verified by Bosch Sensortec where they are configured
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* to provide a generic sensitivity performance.
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*/
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static const struct bma150_cfg default_cfg = {
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.any_motion_int = 1,
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.hg_int = 1,
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.lg_int = 1,
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.any_motion_dur = 0,
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.any_motion_thres = 0,
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.hg_hyst = 0,
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.hg_dur = 150,
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.hg_thres = 160,
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.lg_hyst = 0,
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.lg_dur = 150,
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.lg_thres = 20,
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.range = BMA150_RANGE_2G,
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.bandwidth = BMA150_BW_50HZ
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};
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static int bma150_write_byte(struct i2c_client *client, u8 reg, u8 val)
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{
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s32 ret;
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/* As per specification, disable irq in between register writes */
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if (client->irq)
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disable_irq_nosync(client->irq);
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ret = i2c_smbus_write_byte_data(client, reg, val);
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if (client->irq)
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enable_irq(client->irq);
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return ret;
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}
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static int bma150_set_reg_bits(struct i2c_client *client,
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int val, int shift, u8 mask, u8 reg)
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{
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int data;
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data = i2c_smbus_read_byte_data(client, reg);
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if (data < 0)
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return data;
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data = (data & ~mask) | ((val << shift) & mask);
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return bma150_write_byte(client, reg, data);
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}
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static int bma150_set_mode(struct bma150_data *bma150, u8 mode)
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{
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int error;
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error = bma150_set_reg_bits(bma150->client, mode, BMA150_WAKE_UP_POS,
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BMA150_WAKE_UP_MSK, BMA150_WAKE_UP_REG);
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if (error)
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return error;
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error = bma150_set_reg_bits(bma150->client, mode, BMA150_SLEEP_POS,
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BMA150_SLEEP_MSK, BMA150_SLEEP_REG);
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if (error)
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return error;
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if (mode == BMA150_MODE_NORMAL)
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usleep_range(2000, 2100);
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bma150->mode = mode;
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return 0;
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}
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static int bma150_soft_reset(struct bma150_data *bma150)
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{
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int error;
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error = bma150_set_reg_bits(bma150->client, 1, BMA150_SW_RES_POS,
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BMA150_SW_RES_MSK, BMA150_SW_RES_REG);
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if (error)
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return error;
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usleep_range(2000, 2100);
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return 0;
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}
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static int bma150_set_range(struct bma150_data *bma150, u8 range)
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{
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return bma150_set_reg_bits(bma150->client, range, BMA150_RANGE_POS,
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BMA150_RANGE_MSK, BMA150_RANGE_REG);
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}
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static int bma150_set_bandwidth(struct bma150_data *bma150, u8 bw)
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{
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return bma150_set_reg_bits(bma150->client, bw, BMA150_BANDWIDTH_POS,
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BMA150_BANDWIDTH_MSK, BMA150_BANDWIDTH_REG);
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}
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static int bma150_set_low_g_interrupt(struct bma150_data *bma150,
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u8 enable, u8 hyst, u8 dur, u8 thres)
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{
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int error;
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error = bma150_set_reg_bits(bma150->client, hyst,
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BMA150_LOW_G_HYST_POS, BMA150_LOW_G_HYST_MSK,
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BMA150_LOW_G_HYST_REG);
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if (error)
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return error;
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error = bma150_write_byte(bma150->client, BMA150_LOW_G_DUR_REG, dur);
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if (error)
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return error;
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error = bma150_write_byte(bma150->client, BMA150_LOW_G_THRES_REG, thres);
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if (error)
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return error;
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return bma150_set_reg_bits(bma150->client, !!enable,
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BMA150_LOW_G_EN_POS, BMA150_LOW_G_EN_MSK,
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BMA150_LOW_G_EN_REG);
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}
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static int bma150_set_high_g_interrupt(struct bma150_data *bma150,
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u8 enable, u8 hyst, u8 dur, u8 thres)
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{
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int error;
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error = bma150_set_reg_bits(bma150->client, hyst,
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BMA150_HIGH_G_HYST_POS, BMA150_HIGH_G_HYST_MSK,
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BMA150_HIGH_G_HYST_REG);
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if (error)
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return error;
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error = bma150_write_byte(bma150->client,
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BMA150_HIGH_G_DUR_REG, dur);
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if (error)
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return error;
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error = bma150_write_byte(bma150->client,
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BMA150_HIGH_G_THRES_REG, thres);
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if (error)
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return error;
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return bma150_set_reg_bits(bma150->client, !!enable,
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BMA150_HIGH_G_EN_POS, BMA150_HIGH_G_EN_MSK,
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BMA150_HIGH_G_EN_REG);
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}
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static int bma150_set_any_motion_interrupt(struct bma150_data *bma150,
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u8 enable, u8 dur, u8 thres)
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{
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int error;
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error = bma150_set_reg_bits(bma150->client, dur,
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BMA150_ANY_MOTION_DUR_POS,
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BMA150_ANY_MOTION_DUR_MSK,
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BMA150_ANY_MOTION_DUR_REG);
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if (error)
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return error;
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error = bma150_write_byte(bma150->client,
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BMA150_ANY_MOTION_THRES_REG, thres);
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if (error)
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return error;
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error = bma150_set_reg_bits(bma150->client, !!enable,
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BMA150_ADV_INT_EN_POS, BMA150_ADV_INT_EN_MSK,
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BMA150_ADV_INT_EN_REG);
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if (error)
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return error;
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return bma150_set_reg_bits(bma150->client, !!enable,
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BMA150_ANY_MOTION_EN_POS,
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BMA150_ANY_MOTION_EN_MSK,
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BMA150_ANY_MOTION_EN_REG);
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}
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static void bma150_report_xyz(struct bma150_data *bma150)
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{
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u8 data[BMA150_XYZ_DATA_SIZE];
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s16 x, y, z;
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s32 ret;
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ret = i2c_smbus_read_i2c_block_data(bma150->client,
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BMA150_ACC_X_LSB_REG, BMA150_XYZ_DATA_SIZE, data);
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if (ret != BMA150_XYZ_DATA_SIZE)
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return;
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x = ((0xc0 & data[0]) >> 6) | (data[1] << 2);
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y = ((0xc0 & data[2]) >> 6) | (data[3] << 2);
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z = ((0xc0 & data[4]) >> 6) | (data[5] << 2);
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x = sign_extend32(x, 9);
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y = sign_extend32(y, 9);
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z = sign_extend32(z, 9);
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input_report_abs(bma150->input, ABS_X, x);
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input_report_abs(bma150->input, ABS_Y, y);
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input_report_abs(bma150->input, ABS_Z, z);
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input_sync(bma150->input);
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}
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static irqreturn_t bma150_irq_thread(int irq, void *dev)
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{
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bma150_report_xyz(dev);
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return IRQ_HANDLED;
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}
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static void bma150_poll(struct input_dev *input)
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{
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struct bma150_data *bma150 = input_get_drvdata(input);
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bma150_report_xyz(bma150);
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}
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static int bma150_open(struct input_dev *input)
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{
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struct bma150_data *bma150 = input_get_drvdata(input);
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int error;
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error = pm_runtime_get_sync(&bma150->client->dev);
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if (error < 0 && error != -ENOSYS)
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return error;
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/*
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* See if runtime PM woke up the device. If runtime PM
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* is disabled we need to do it ourselves.
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*/
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if (bma150->mode != BMA150_MODE_NORMAL) {
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error = bma150_set_mode(bma150, BMA150_MODE_NORMAL);
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if (error)
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return error;
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}
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return 0;
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}
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static void bma150_close(struct input_dev *input)
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{
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struct bma150_data *bma150 = input_get_drvdata(input);
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pm_runtime_put_sync(&bma150->client->dev);
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if (bma150->mode != BMA150_MODE_SLEEP)
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bma150_set_mode(bma150, BMA150_MODE_SLEEP);
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}
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static int bma150_initialize(struct bma150_data *bma150,
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const struct bma150_cfg *cfg)
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{
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int error;
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error = bma150_soft_reset(bma150);
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if (error)
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return error;
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error = bma150_set_bandwidth(bma150, cfg->bandwidth);
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if (error)
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return error;
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error = bma150_set_range(bma150, cfg->range);
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if (error)
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return error;
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if (bma150->client->irq) {
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error = bma150_set_any_motion_interrupt(bma150,
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cfg->any_motion_int,
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cfg->any_motion_dur,
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cfg->any_motion_thres);
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if (error)
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return error;
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error = bma150_set_high_g_interrupt(bma150,
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cfg->hg_int, cfg->hg_hyst,
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cfg->hg_dur, cfg->hg_thres);
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if (error)
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return error;
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error = bma150_set_low_g_interrupt(bma150,
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cfg->lg_int, cfg->lg_hyst,
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cfg->lg_dur, cfg->lg_thres);
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if (error)
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return error;
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}
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return bma150_set_mode(bma150, BMA150_MODE_SLEEP);
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}
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static int bma150_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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const struct bma150_platform_data *pdata =
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dev_get_platdata(&client->dev);
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const struct bma150_cfg *cfg;
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struct bma150_data *bma150;
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struct input_dev *idev;
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int chip_id;
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int error;
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if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
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dev_err(&client->dev, "i2c_check_functionality error\n");
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return -EIO;
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}
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chip_id = i2c_smbus_read_byte_data(client, BMA150_CHIP_ID_REG);
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if (chip_id != BMA150_CHIP_ID) {
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dev_err(&client->dev, "BMA150 chip id error: %d\n", chip_id);
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return -EINVAL;
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}
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bma150 = devm_kzalloc(&client->dev, sizeof(*bma150), GFP_KERNEL);
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if (!bma150)
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return -ENOMEM;
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bma150->client = client;
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if (pdata) {
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if (pdata->irq_gpio_cfg) {
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error = pdata->irq_gpio_cfg();
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if (error) {
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dev_err(&client->dev,
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"IRQ GPIO conf. error %d, error %d\n",
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client->irq, error);
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return error;
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}
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}
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cfg = &pdata->cfg;
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} else {
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cfg = &default_cfg;
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}
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error = bma150_initialize(bma150, cfg);
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if (error)
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return error;
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idev = devm_input_allocate_device(&bma150->client->dev);
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if (!idev)
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return -ENOMEM;
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input_set_drvdata(idev, bma150);
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bma150->input = idev;
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idev->name = BMA150_DRIVER;
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idev->phys = BMA150_DRIVER "/input0";
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idev->id.bustype = BUS_I2C;
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idev->open = bma150_open;
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idev->close = bma150_close;
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input_set_abs_params(idev, ABS_X, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
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input_set_abs_params(idev, ABS_Y, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
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input_set_abs_params(idev, ABS_Z, ABSMIN_ACC_VAL, ABSMAX_ACC_VAL, 0, 0);
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if (client->irq <= 0) {
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error = input_setup_polling(idev, bma150_poll);
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if (error)
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return error;
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input_set_poll_interval(idev, BMA150_POLL_INTERVAL);
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input_set_min_poll_interval(idev, BMA150_POLL_MIN);
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input_set_max_poll_interval(idev, BMA150_POLL_MAX);
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}
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error = input_register_device(idev);
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if (error)
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return error;
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if (client->irq > 0) {
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error = devm_request_threaded_irq(&client->dev, client->irq,
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NULL, bma150_irq_thread,
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IRQF_TRIGGER_RISING | IRQF_ONESHOT,
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BMA150_DRIVER, bma150);
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if (error) {
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dev_err(&client->dev,
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"irq request failed %d, error %d\n",
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client->irq, error);
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return error;
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}
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}
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i2c_set_clientdata(client, bma150);
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pm_runtime_enable(&client->dev);
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return 0;
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}
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static int bma150_remove(struct i2c_client *client)
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{
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pm_runtime_disable(&client->dev);
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return 0;
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}
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static int __maybe_unused bma150_suspend(struct device *dev)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct bma150_data *bma150 = i2c_get_clientdata(client);
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return bma150_set_mode(bma150, BMA150_MODE_SLEEP);
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}
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static int __maybe_unused bma150_resume(struct device *dev)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct bma150_data *bma150 = i2c_get_clientdata(client);
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return bma150_set_mode(bma150, BMA150_MODE_NORMAL);
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}
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static UNIVERSAL_DEV_PM_OPS(bma150_pm, bma150_suspend, bma150_resume, NULL);
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static const struct i2c_device_id bma150_id[] = {
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{ "bma150", 0 },
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{ "smb380", 0 },
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{ "bma023", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, bma150_id);
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static struct i2c_driver bma150_driver = {
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.driver = {
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.name = BMA150_DRIVER,
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.pm = &bma150_pm,
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},
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.class = I2C_CLASS_HWMON,
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.id_table = bma150_id,
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.probe = bma150_probe,
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.remove = bma150_remove,
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};
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module_i2c_driver(bma150_driver);
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MODULE_AUTHOR("Albert Zhang <xu.zhang@bosch-sensortec.com>");
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MODULE_DESCRIPTION("BMA150 driver");
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MODULE_LICENSE("GPL");
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