From: Michael Hennerich <michael.hennerich@xxxxxxxxxx> This is a driver for the ADXL345/346 Three-Axis Digital Accelerometers. Signed-off-by: Michael Hennerich <michael.hennerich@xxxxxxxxxx> Signed-off-by: Chris Verges <chrisv@xxxxxxxxxxxxxxxxxx> Signed-off-by: Luotao Fu <l.fu@xxxxxxxxxxxxxx> Signed-off-by: Barry Song <barry.song@xxxxxxxxxx> Signed-off-by: Mike Frysinger <vapier@xxxxxxxxxx> --- v2 - fixed a few typos drivers/input/misc/Kconfig | 37 ++ drivers/input/misc/Makefile | 3 + drivers/input/misc/adxl34x-i2c.c | 136 ++++++ drivers/input/misc/adxl34x-spi.c | 127 ++++++ drivers/input/misc/adxl34x.c | 875 ++++++++++++++++++++++++++++++++++++++ drivers/input/misc/adxl34x.h | 26 ++ include/linux/input/adxl34x.h | 295 +++++++++++++ 7 files changed, 1499 insertions(+), 0 deletions(-) create mode 100644 drivers/input/misc/adxl34x-i2c.c create mode 100644 drivers/input/misc/adxl34x-spi.c create mode 100644 drivers/input/misc/adxl34x.c create mode 100644 drivers/input/misc/adxl34x.h create mode 100644 include/linux/input/adxl34x.h diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 02f4f8f..9e1e42f 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -316,4 +316,41 @@ config INPUT_PCAP To compile this driver as a module, choose M here: the module will be called pcap_keys. +config INPUT_ADXL34X + tristate "Analog Devices ADXL34x Three-Axis Digital Accelerometer" + default n + help + Say Y here if you have a Accelerometer interface using the + ADXL345/6 controller, and your board-specific initialization + code includes that in its table of devices. + + This driver can use either I2C or SPI communication to the + ADXL345/6 controller. Select the appropriate method for + your system. + + If unsure, say N (but it's safe to say "Y"). + + To compile this driver as a module, choose M here: the + module will be called adxl34x. + +config INPUT_ADXL34X_I2C + tristate "support I2C bus connection" + depends on INPUT_ADXL34X && I2C + default y + help + Say Y here if you have ADXL345/6 hooked to an I2C bus. + + To compile this driver as a module, choose M here: the + module will be called adxl34x-i2c. + +config INPUT_ADXL34X_SPI + tristate "support SPI bus connection" + depends on INPUT_ADXL34X && SPI + default y + help + Say Y here if you have ADXL345/6 hooked to a SPI bus. + + To compile this driver as a module, choose M here: the + module will be called adxl34x-spi. + endif diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index a8b8485..c39629e 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -4,6 +4,9 @@ # Each configuration option enables a list of files. +obj-$(CONFIG_INPUT_ADXL34X) += adxl34x.o +obj-$(CONFIG_INPUT_ADXL34X_I2C) += adxl34x-i2c.o +obj-$(CONFIG_INPUT_ADXL34X_SPI) += adxl34x-spi.o obj-$(CONFIG_INPUT_APANEL) += apanel.o obj-$(CONFIG_INPUT_ATI_REMOTE) += ati_remote.o obj-$(CONFIG_INPUT_ATI_REMOTE2) += ati_remote2.o diff --git a/drivers/input/misc/adxl34x-i2c.c b/drivers/input/misc/adxl34x-i2c.c new file mode 100644 index 0000000..13141f4 --- /dev/null +++ b/drivers/input/misc/adxl34x-i2c.c @@ -0,0 +1,136 @@ +/* + * ADLX345/346 Three-Axis Digital Accelerometers (I2C Interface) + * + * Enter bugs at http://blackfin.uclinux.org/ + * + * Copyright (C) 2009 Michael Hennerich, Analog Devices Inc. + * Licensed under the GPL-2 or later. + */ + +#include <linux/input.h> /* BUS_I2C */ +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/types.h> +#include "adxl34x.h" + +static int adxl34x_smbus_read(struct device *dev, unsigned char reg) +{ + struct i2c_client *client = to_i2c_client(dev); + return i2c_smbus_read_byte_data(client, reg); +} + +static int adxl34x_smbus_write(struct device *dev, + unsigned char reg, unsigned char val) +{ + struct i2c_client *client = to_i2c_client(dev); + return i2c_smbus_write_byte_data(client, reg, val); +} + +static int adxl34x_smbus_read_block(struct device *dev, + unsigned char reg, int count, + unsigned char *buf) +{ + struct i2c_client *client = to_i2c_client(dev); + return i2c_smbus_read_i2c_block_data(client, reg, count, buf); +} + +static int adxl34x_i2c_read_block(struct device *dev, + unsigned char reg, int count, + unsigned char *buf) +{ + struct i2c_client *client = to_i2c_client(dev); + int ret; + + ret = i2c_master_send(client, ®, 1); + if (ret < 0) + return ret; + ret = i2c_master_recv(client, buf, count); + if (ret < 0) + return ret; + if (ret != count) + return -EIO; + + return 0; +} + +static int __devinit adxl34x_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct adxl34x *ac; + int error; + + error = i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_BYTE_DATA); + if (!error) { + dev_err(&client->dev, "SMBUS Byte Data not Supported\n"); + return -EIO; + } + + error = adxl34x_probe(&ac, &client->dev, BUS_I2C, client->irq, 0, + adxl34x_smbus_read, + i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_READ_I2C_BLOCK) ? + adxl34x_smbus_read_block : + adxl34x_i2c_read_block, + adxl34x_smbus_write); + i2c_set_clientdata(client, ac); + + return error; +} + +static int __devexit adxl34x_i2c_remove(struct i2c_client *client) +{ + return adxl34x_remove(i2c_get_clientdata(client)); +} + +#ifdef CONFIG_PM +static int adxl34x_suspend(struct i2c_client *client, pm_message_t message) +{ + adxl34x_disable(i2c_get_clientdata(client)); + return 0; +} + +static int adxl34x_resume(struct i2c_client *client) +{ + adxl34x_enable(i2c_get_clientdata(client)); + return 0; +} +#else +# define adxl34x_suspend NULL +# define adxl34x_resume NULL +#endif + +static const struct i2c_device_id adxl34x_id[] = { + { "adxl34x", 0 }, + { } +}; + +MODULE_DEVICE_TABLE(i2c, adxl34x_id); + +static struct i2c_driver adxl34x_driver = { + .driver = { + .name = "adxl34x", + .owner = THIS_MODULE, + }, + .probe = adxl34x_i2c_probe, + .remove = __devexit_p(adxl34x_i2c_remove), + .suspend = adxl34x_suspend, + .resume = adxl34x_resume, + .id_table = adxl34x_id, +}; + +static int __init adxl34x_i2c_init(void) +{ + return i2c_add_driver(&adxl34x_driver); +} +module_init(adxl34x_i2c_init); + +static void __exit adxl34x_i2c_exit(void) +{ + i2c_del_driver(&adxl34x_driver); +} +module_exit(adxl34x_i2c_exit); + +MODULE_AUTHOR("Michael Hennerich <hennerich@xxxxxxxxxxxxxxxxxxxx>"); +MODULE_DESCRIPTION("ADXL345/346 Three-Axis Digital Accelerometer I2C Bus Driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/input/misc/adxl34x-spi.c b/drivers/input/misc/adxl34x-spi.c new file mode 100644 index 0000000..c02e332 --- /dev/null +++ b/drivers/input/misc/adxl34x-spi.c @@ -0,0 +1,127 @@ +/* + * ADLX345/346 Three-Axis Digital Accelerometers (SPI Interface) + * + * Enter bugs at http://blackfin.uclinux.org/ + * + * Copyright (C) 2009 Michael Hennerich, Analog Devices Inc. + * Licensed under the GPL-2 or later. + */ + +#include <linux/input.h> /* BUS_SPI */ +#include <linux/module.h> +#include <linux/spi/spi.h> +#include <linux/types.h> +#include "adxl34x.h" + +#define MAX_SPI_FREQ_HZ 5000000 +#define MAX_FREQ_NO_FIFODELAY 1500000 +#define ADXL34X_CMD_MULTB (1 << 6) +#define ADXL34X_CMD_READ (1 << 7) +#define ADXL34X_WRITECMD(reg) (reg & 0x3F) +#define ADXL34X_READCMD(reg) (ADXL34X_CMD_READ | (reg & 0x3F)) +#define ADXL34X_READMB_CMD(reg) (ADXL34X_CMD_READ | ADXL34X_CMD_MULTB \ + | (reg & 0x3F)) + +static int adxl34x_spi_read(struct device *dev, unsigned char reg) +{ + struct spi_device *spi = to_spi_device(dev); + unsigned char cmd; + + cmd = ADXL34X_READCMD(reg); + + return spi_w8r8(spi, cmd); +} + +static int adxl34x_spi_write(struct device *dev, + unsigned char reg, unsigned char val) +{ + struct spi_device *spi = to_spi_device(dev); + unsigned char buf[2]; + + buf[0] = ADXL34X_WRITECMD(reg); + buf[1] = val; + + return spi_write(spi, buf, sizeof(buf)); +} + +static int adxl34x_spi_read_block(struct device *dev, + unsigned char reg, int count, + unsigned char *buf) +{ + struct spi_device *spi = to_spi_device(dev); + ssize_t status; + + reg = ADXL34X_READMB_CMD(reg); + status = spi_write_then_read(spi, ®, 1, buf, count); + + return (status < 0) ? status : 0; +} + +static int __devinit adxl34x_spi_probe(struct spi_device *spi) +{ + struct adxl34x *ac; + int error; + + /* don't exceed max specified SPI CLK frequency */ + if (spi->max_speed_hz > MAX_SPI_FREQ_HZ) { + dev_err(&spi->dev, "SPI CLK %d Hz too fast\n", spi->max_speed_hz); + return -EINVAL; + } + + error = adxl34x_probe(&ac, &spi->dev, BUS_SPI, spi->irq, + spi->max_speed_hz > MAX_FREQ_NO_FIFODELAY, + adxl34x_spi_read, adxl34x_spi_read_block, adxl34x_spi_write); + spi_set_drvdata(spi, ac); + + return error; +} + +static int __devexit adxl34x_spi_remove(struct spi_device *spi) +{ + return adxl34x_remove(dev_get_drvdata(&spi->dev)); +} + +#ifdef CONFIG_PM +static int adxl34x_suspend(struct spi_device *spi, pm_message_t message) +{ + adxl34x_disable(spi_get_drvdata(spi)); + return 0; +} + +static int adxl34x_resume(struct spi_device *spi) +{ + adxl34x_enable(spi_get_drvdata(spi)); + return 0; +} +#else +# define adxl34x_suspend NULL +# define adxl34x_resume NULL +#endif + +static struct spi_driver adxl34x_driver = { + .driver = { + .name = "adxl34x", + .bus = &spi_bus_type, + .owner = THIS_MODULE, + }, + .probe = adxl34x_spi_probe, + .remove = __devexit_p(adxl34x_spi_remove), + .suspend = adxl34x_suspend, + .resume = adxl34x_resume, +}; + +static int __init adxl34x_spi_init(void) +{ + return spi_register_driver(&adxl34x_driver); +} +module_init(adxl34x_spi_init); + +static void __exit adxl34x_spi_exit(void) +{ + spi_unregister_driver(&adxl34x_driver); +} +module_exit(adxl34x_spi_exit); + +MODULE_AUTHOR("Michael Hennerich <hennerich@xxxxxxxxxxxxxxxxxxxx>"); +MODULE_DESCRIPTION("ADXL345/346 Three-Axis Digital Accelerometer SPI Bus Driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/input/misc/adxl34x.c b/drivers/input/misc/adxl34x.c new file mode 100644 index 0000000..7e28360 --- /dev/null +++ b/drivers/input/misc/adxl34x.c @@ -0,0 +1,875 @@ +/* + * ADXL345/346 Three-Axis Digital Accelerometers + * + * Enter bugs at http://blackfin.uclinux.org/ + * + * Copyright (C) 2009 Michael Hennerich, Analog Devices Inc. + * Licensed under the GPL-2 or later. + */ + +#include <linux/device.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/input.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/slab.h> +#include <linux/workqueue.h> +#include <linux/spi/spi.h> +#include <linux/i2c.h> + +#include <linux/input/adxl34x.h> + +#include "adxl34x.h" + +/* ADXL345/6 Register Map */ +#define DEVID 0x00 /* R Device ID */ +#define THRESH_TAP 0x1D /* R/W Tap threshold */ +#define OFSX 0x1E /* R/W X-axis offset */ +#define OFSY 0x1F /* R/W Y-axis offset */ +#define OFSZ 0x20 /* R/W Z-axis offset */ +#define DUR 0x21 /* R/W Tap duration */ +#define LATENT 0x22 /* R/W Tap latency */ +#define WINDOW 0x23 /* R/W Tap window */ +#define THRESH_ACT 0x24 /* R/W Activity threshold */ +#define THRESH_INACT 0x25 /* R/W Inactivity threshold */ +#define TIME_INACT 0x26 /* R/W Inactivity time */ +#define ACT_INACT_CTL 0x27 /* R/W Axis enable control for activity and */ + /* inactivity detection */ +#define THRESH_FF 0x28 /* R/W Free-fall threshold */ +#define TIME_FF 0x29 /* R/W Free-fall time */ +#define TAP_AXES 0x2A /* R/W Axis control for tap/double tap */ +#define ACT_TAP_STATUS 0x2B /* R Source of tap/double tap */ +#define BW_RATE 0x2C /* R/W Data rate and power mode control */ +#define POWER_CTL 0x2D /* R/W Power saving features control */ +#define INT_ENABLE 0x2E /* R/W Interrupt enable control */ +#define INT_MAP 0x2F /* R/W Interrupt mapping control */ +#define INT_SOURCE 0x30 /* R Source of interrupts */ +#define DATA_FORMAT 0x31 /* R/W Data format control */ +#define DATAX0 0x32 /* R X-Axis Data 0 */ +#define DATAX1 0x33 /* R X-Axis Data 1 */ +#define DATAY0 0x34 /* R Y-Axis Data 0 */ +#define DATAY1 0x35 /* R Y-Axis Data 1 */ +#define DATAZ0 0x36 /* R Z-Axis Data 0 */ +#define DATAZ1 0x37 /* R Z-Axis Data 1 */ +#define FIFO_CTL 0x38 /* R/W FIFO control */ +#define FIFO_STATUS 0x39 /* R FIFO status */ +#define TAP_SIGN 0x3A /* R Sign and source for tap/double tap */ +/* Orientation ADXL346 only */ +#define ORIENT_CONF 0x3B /* R/W Orientation configuration */ +#define ORIENT 0x3C /* R Orientation status */ + +/* DEVIDs */ +#define ID_ADXL345 0xE5 +#define ID_ADXL346 0xE6 + +/* INT_ENABLE/INT_MAP/INT_SOURCE Bits */ +#define DATA_READY (1 << 7) +#define SINGLE_TAP (1 << 6) +#define DOUBLE_TAP (1 << 5) +#define ACTIVITY (1 << 4) +#define INACTIVITY (1 << 3) +#define FREE_FALL (1 << 2) +#define WATERMARK (1 << 1) +#define OVERRUN (1 << 0) + +/* ACT_INACT_CONTROL Bits */ +#define ACT_ACDC (1 << 7) +#define ACT_X_EN (1 << 6) +#define ACT_Y_EN (1 << 5) +#define ACT_Z_EN (1 << 4) +#define INACT_ACDC (1 << 3) +#define INACT_X_EN (1 << 2) +#define INACT_Y_EN (1 << 1) +#define INACT_Z_EN (1 << 0) + +/* TAP_AXES Bits */ +#define SUPPRESS (1 << 3) +#define TAP_X_EN (1 << 2) +#define TAP_Y_EN (1 << 1) +#define TAP_Z_EN (1 << 0) + +/* ACT_TAP_STATUS Bits */ +#define ACT_X_SRC (1 << 6) +#define ACT_Y_SRC (1 << 5) +#define ACT_Z_SRC (1 << 4) +#define ASLEEP (1 << 3) +#define TAP_X_SRC (1 << 2) +#define TAP_Y_SRC (1 << 1) +#define TAP_Z_SRC (1 << 0) + +/* BW_RATE Bits */ +#define LOW_POWER (1 << 4) +#define RATE(x) ((x) & 0xF) + +/* POWER_CTL Bits */ +#define PCTL_LINK (1 << 5) +#define PCTL_AUTO_SLEEP (1 << 4) +#define PCTL_MEASURE (1 << 3) +#define PCTL_SLEEP (1 << 2) +#define PCTL_WAKEUP(x) ((x) & 0x3) + +/* DATA_FORMAT Bits */ +#define SELF_TEST (1 << 7) +#define SPI (1 << 6) +#define INT_INVERT (1 << 5) +#define FULL_RES (1 << 3) +#define JUSTIFY (1 << 2) +#define RANGE(x) ((x) & 0x3) +#define RANGE_PM_2g 0 +#define RANGE_PM_4g 1 +#define RANGE_PM_8g 2 +#define RANGE_PM_16g 3 + +/* + * Maximum value our axis may get in full res mode for the input device + * (signed 13 bits) + */ +#define ADXL_FULLRES_MAX_VAL 4096 + +/* + * Maximum value our axis may get in fixed res mode for the input device + * (signed 10 bits) + */ +#define ADXL_FIXEDRES_MAX_VAL 512 + +/* FIFO_CTL Bits */ +#define FIFO_MODE(x) (((x) & 0x3) << 6) +#define FIFO_BYPASS 0 +#define FIFO_FIFO 1 +#define FIFO_STREAM 2 +#define FIFO_TRIGGER 3 +#define TRIGGER (1 << 5) +#define SAMPLES(x) ((x) & 0x1F) + +/* FIFO_STATUS Bits */ +#define FIFO_TRIG (1 << 7) +#define ENTRIES(x) ((x) & 0x3F) + +/* TAP_SIGN Bits ADXL346 only */ +#define XSIGN (1 << 6) +#define YSIGN (1 << 5) +#define ZSIGN (1 << 4) +#define XTAP (1 << 3) +#define YTAP (1 << 2) +#define ZTAP (1 << 1) + +/* ORIENT_CONF ADXL346 only */ +#define ORIENT_DEADZONE(x) (((x) & 0x7) << 4) +#define ORIENT_DIVISOR(x) ((x) & 0x7) + +/* ORIENT ADXL346 only */ +#define ADXL346_2D_VALID (1 << 6) +#define ADXL346_2D_ORIENT(x) (((x) & 0x3) >> 4) +#define ADXL346_3D_VALID (1 << 3) +#define ADXL346_3D_ORIENT(x) ((x) & 0x7) +#define ADXL346_2D_PORTRAIT_POS 0 /* +X */ +#define ADXL346_2D_PORTRAIT_NEG 1 /* -X */ +#define ADXL346_2D_LANDSCAPE_POS 2 /* +Y */ +#define ADXL346_2D_LANDSCAPE_NEG 3 /* -Y */ + +#define ADXL346_3D_FRONT 3 /* +X */ +#define ADXL346_3D_BACK 4 /* -X */ +#define ADXL346_3D_RIGHT 2 /* +Y */ +#define ADXL346_3D_LEFT 5 /* -Y */ +#define ADXL346_3D_TOP 1 /* +Z */ +#define ADXL346_3D_BOTTOM 6 /* -Z */ + +#undef ADXL_DEBUG + +#define AC_READ(ac, reg) ((ac)->read((ac)->dev, reg)) +#define AC_WRITE(ac, reg, val) ((ac)->write((ac)->dev, reg, val)) + +struct axis_triple { + int x; + int y; + int z; +}; + +struct adxl34x { + struct device *dev; + int irq; + struct input_dev *input; + struct work_struct work; + struct mutex mutex; /* reentrant protection for struct */ + struct adxl34x_platform_data pdata; + struct axis_triple swcal; + struct axis_triple hwcal; + struct axis_triple saved; + char phys[32]; + unsigned disabled:1; /* P: mutex */ + unsigned opened:1; /* P: mutex */ + unsigned fifo_delay:1; + unsigned model; + unsigned int_mask; + + adxl34x_read_t *read; + adxl34x_read_block_t *read_block; + adxl34x_write_t *write; +}; + +static const struct adxl34x_platform_data adxl34x_default_init = { + .tap_threshold = 35, + .tap_duration = 3, + .tap_latency = 20, + .tap_window = 20, + .tap_axis_control = ADXL_TAP_X_EN | ADXL_TAP_Y_EN | ADXL_TAP_Z_EN, + .act_axis_control = 0xFF, + .activity_threshold = 6, + .inactivity_threshold = 4, + .inactivity_time = 3, + .free_fall_threshold = 8, + .free_fall_time = 0x20, + .data_rate = 8, + .data_range = ADXL_FULL_RES, + + .ev_type = EV_ABS, + .ev_code_x = ABS_X, /* EV_REL */ + .ev_code_y = ABS_Y, /* EV_REL */ + .ev_code_z = ABS_Z, /* EV_REL */ + + .ev_code_tap_x = BTN_TOUCH, /* EV_KEY */ + .ev_code_tap_y = BTN_TOUCH, /* EV_KEY */ + .ev_code_tap_z = BTN_TOUCH, /* EV_KEY */ + .power_mode = ADXL_AUTO_SLEEP | ADXL_LINK, + .fifo_mode = FIFO_STREAM, + .watermark = 0, +}; + +static void adxl34x_get_triple(struct adxl34x *ac, struct axis_triple *axis) +{ + short buf[3]; + + ac->read_block(ac->dev, DATAX0, DATAZ1 - DATAX0 + 1, + (unsigned char *)buf); + + mutex_lock(&ac->mutex); + ac->saved.x = (s16) le16_to_cpu(buf[0]); + axis->x = ac->saved.x; + + ac->saved.y = (s16) le16_to_cpu(buf[1]); + axis->y = ac->saved.y; + + ac->saved.z = (s16) le16_to_cpu(buf[2]); + axis->z = ac->saved.z; + mutex_unlock(&ac->mutex); +} + +static void adxl34x_service_ev_fifo(struct adxl34x *ac) +{ + struct adxl34x_platform_data *pdata = &ac->pdata; + struct axis_triple axis; + + adxl34x_get_triple(ac, &axis); + + input_event(ac->input, pdata->ev_type, pdata->ev_code_x, + axis.x - ac->swcal.x); + input_event(ac->input, pdata->ev_type, pdata->ev_code_y, + axis.y - ac->swcal.y); + input_event(ac->input, pdata->ev_type, pdata->ev_code_z, + axis.z - ac->swcal.z); +} + +static void adxl34x_report_key_single(struct input_dev *input, int key) +{ + input_report_key(input, key, 1); + input_sync(input); + input_report_key(input, key, 0); +} + +static void adxl34x_report_key_double(struct input_dev *input, int key) +{ + input_report_key(input, key, 1); + input_sync(input); + input_report_key(input, key, 0); + input_sync(input); + input_report_key(input, key, 1); + input_sync(input); + input_report_key(input, key, 0); +} + +static void adxl34x_work(struct work_struct *work) +{ + struct adxl34x *ac = container_of(work, struct adxl34x, work); + struct adxl34x_platform_data *pdata = &ac->pdata; + int int_stat, tap_stat, samples; + + /* + * ACT_TAP_STATUS should be read before clearing the interrupt + * Avoid reading ACT_TAP_STATUS in case TAP detection is disabled + */ + + if (pdata->tap_axis_control & (TAP_X_EN | TAP_Y_EN | TAP_Z_EN)) + tap_stat = AC_READ(ac, ACT_TAP_STATUS); + else + tap_stat = 0; + + int_stat = AC_READ(ac, INT_SOURCE); + + if (int_stat & FREE_FALL) + adxl34x_report_key_single(ac->input, pdata->ev_code_ff); + + if (int_stat & OVERRUN) + dev_dbg(ac->dev, "OVERRUN\n"); + + if (int_stat & SINGLE_TAP) { + if (tap_stat & TAP_X_SRC) + adxl34x_report_key_single(ac->input, + pdata->ev_code_tap_x); + if (tap_stat & TAP_Y_SRC) + adxl34x_report_key_single(ac->input, + pdata->ev_code_tap_y); + if (tap_stat & TAP_Z_SRC) + adxl34x_report_key_single(ac->input, + pdata->ev_code_tap_z); + } + + if (int_stat & DOUBLE_TAP) { + if (tap_stat & TAP_X_SRC) + adxl34x_report_key_double(ac->input, + pdata->ev_code_tap_x); + if (tap_stat & TAP_Y_SRC) + adxl34x_report_key_double(ac->input, + pdata->ev_code_tap_y); + if (tap_stat & TAP_Z_SRC) + adxl34x_report_key_double(ac->input, + pdata->ev_code_tap_z); + } + + if (pdata->ev_code_act_inactivity) { + if (int_stat & ACTIVITY) + input_report_key(ac->input, + pdata->ev_code_act_inactivity, 1); + if (int_stat & INACTIVITY) + input_report_key(ac->input, + pdata->ev_code_act_inactivity, 0); + } + + if (int_stat & (DATA_READY | WATERMARK)) { + + if (pdata->fifo_mode) + samples = ENTRIES(AC_READ(ac, FIFO_STATUS)) + 1; + else + samples = 1; + + for (; samples > 0; samples--) { + adxl34x_service_ev_fifo(ac); + /* + * To ensure that the FIFO has + * completely popped, there must be at least 5 us between + * the end of reading the data registers, signified by the + * transition to register 0x38 from 0x37 or the CS pin + * going high, and the start of new reads of the FIFO or + * reading the FIFO_STATUS register. For SPI operation at + * 1.5 MHz or lower, the register addressing portion of the + * transmission is sufficient delay to ensure the FIFO has + * completely popped. It is necessary for SPI operation + * greater than 1.5 MHz to de-assert the CS pin to ensure a + * total of 5 us, which is at most 3.4 us at 5 MHz + * operation. + */ + if (ac->fifo_delay && (samples > 1)) + udelay(3); + } + } + + input_sync(ac->input); + enable_irq(ac->irq); +} + +static irqreturn_t adxl34x_irq(int irq, void *handle) +{ + struct adxl34x *ac = handle; + + disable_irq_nosync(irq); + schedule_work(&ac->work); + + return IRQ_HANDLED; +} + +void adxl34x_disable(struct adxl34x *ac) +{ + mutex_lock(&ac->mutex); + if (!ac->disabled && ac->opened) { + ac->disabled = 1; + cancel_work_sync(&ac->work); + /* + * A '0' places the ADXL34x into standby mode + * with minimum power consumption. + */ + AC_WRITE(ac, POWER_CTL, 0); + } + mutex_unlock(&ac->mutex); +} +EXPORT_SYMBOL_GPL(adxl34x_disable); + +void adxl34x_enable(struct adxl34x *ac) +{ + mutex_lock(&ac->mutex); + if (ac->disabled && ac->opened) { + AC_WRITE(ac, POWER_CTL, ac->pdata.power_mode | PCTL_MEASURE); + ac->disabled = 0; + } + mutex_unlock(&ac->mutex); +} +EXPORT_SYMBOL_GPL(adxl34x_enable); + +static ssize_t adxl34x_disable_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct adxl34x *ac = dev_get_drvdata(dev); + + return sprintf(buf, "%u\n", ac->disabled); +} + +static ssize_t adxl34x_disable_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct adxl34x *ac = dev_get_drvdata(dev); + unsigned long val; + int error; + + error = strict_strtoul(buf, 10, &val); + if (error) + return error; + + if (val) + adxl34x_disable(ac); + else + adxl34x_enable(ac); + + return count; +} + +static DEVICE_ATTR(disable, 0664, adxl34x_disable_show, adxl34x_disable_store); + +static ssize_t adxl34x_calibrate_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct adxl34x *ac = dev_get_drvdata(dev); + ssize_t count; + + mutex_lock(&ac->mutex); + count = sprintf(buf, "%d,%d,%d\n", ac->hwcal.x * 4 + ac->swcal.x, + ac->hwcal.y * 4 + ac->swcal.y, + ac->hwcal.z * 4 + ac->swcal.z); + mutex_unlock(&ac->mutex); + + return count; +} + +static ssize_t adxl34x_calibrate_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct adxl34x *ac = dev_get_drvdata(dev); + + /* + * Hardware offset calibration has a resolution of 15.6 mg/LSB. + * We use HW calibration and handle the remaining bits in SW. (4mg/LSB) + */ + + mutex_lock(&ac->mutex); + ac->hwcal.x -= (ac->saved.x / 4); + ac->swcal.x = ac->saved.x % 4; + + ac->hwcal.y -= (ac->saved.y / 4); + ac->swcal.y = ac->saved.y % 4; + + ac->hwcal.z -= (ac->saved.z / 4); + ac->swcal.z = ac->saved.z % 4; + + AC_WRITE(ac, OFSX, (s8) ac->hwcal.x); + AC_WRITE(ac, OFSY, (s8) ac->hwcal.y); + AC_WRITE(ac, OFSZ, (s8) ac->hwcal.z); + mutex_unlock(&ac->mutex); + + return count; +} + +static DEVICE_ATTR(calibrate, 0664, adxl34x_calibrate_show, + adxl34x_calibrate_store); + +static ssize_t adxl34x_rate_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct adxl34x *ac = dev_get_drvdata(dev); + ssize_t count; + + mutex_lock(&ac->mutex); + count = sprintf(buf, "%u\n", RATE(ac->pdata.data_rate)); + mutex_unlock(&ac->mutex); + + return count; +} + +static ssize_t adxl34x_rate_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct adxl34x *ac = dev_get_drvdata(dev); + unsigned long val; + int error; + + mutex_lock(&ac->mutex); + error = strict_strtoul(buf, 10, &val); + if (error) + return error; + + ac->pdata.data_rate = RATE(val); + + AC_WRITE(ac, BW_RATE, ac->pdata.data_rate | + (ac->pdata.low_power_mode ? LOW_POWER : 0)); + mutex_unlock(&ac->mutex); + + return count; +} + +static DEVICE_ATTR(rate, 0664, adxl34x_rate_show, adxl34x_rate_store); + +static ssize_t adxl34x_autosleep_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct adxl34x *ac = dev_get_drvdata(dev); + ssize_t count; + + mutex_lock(&ac->mutex); + count = sprintf(buf, "%u\n", ac->pdata.power_mode & + (PCTL_AUTO_SLEEP | PCTL_LINK) ? 1 : 0); + mutex_unlock(&ac->mutex); + + return count; +} + +static ssize_t adxl34x_autosleep_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct adxl34x *ac = dev_get_drvdata(dev); + unsigned long val; + int error; + + mutex_lock(&ac->mutex); + error = strict_strtoul(buf, 10, &val); + if (error) + return error; + + if (val) + ac->pdata.power_mode |= (PCTL_AUTO_SLEEP | PCTL_LINK); + else + ac->pdata.power_mode &= ~(PCTL_AUTO_SLEEP | PCTL_LINK); + + if (!ac->disabled && ac->opened) + AC_WRITE(ac, POWER_CTL, ac->pdata.power_mode | PCTL_MEASURE); + + mutex_unlock(&ac->mutex); + + return count; +} + +static DEVICE_ATTR(autosleep, 0664, adxl34x_autosleep_show, + adxl34x_autosleep_store); + +static ssize_t adxl34x_position_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct adxl34x *ac = dev_get_drvdata(dev); + ssize_t count; + + mutex_lock(&ac->mutex); + + count = sprintf(buf, "(%d, %d, %d)\n", + ac->saved.x, ac->saved.y, ac->saved.z); + + mutex_unlock(&ac->mutex); + + return count; +} + +static DEVICE_ATTR(position, 0444, adxl34x_position_show, NULL); + +#ifdef ADXL_DEBUG +static ssize_t adxl34x_write_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct adxl34x *ac = dev_get_drvdata(dev); + unsigned long val; + int error; + + /* + * This allows basic ADXL register write access for debug purposes. + */ + mutex_lock(&ac->mutex); + error = strict_strtoul(buf, 16, &val); + if (error) + return error; + + AC_WRITE(ac, val >> 8, val & 0xFF); + mutex_unlock(&ac->mutex); + + return count; +} + +static DEVICE_ATTR(write, 0664, NULL, adxl34x_write_store); +#endif + +static struct attribute *adxl34x_attributes[] = { + &dev_attr_disable.attr, + &dev_attr_calibrate.attr, + &dev_attr_rate.attr, + &dev_attr_autosleep.attr, + &dev_attr_position.attr, +#ifdef ADXL_DEBUG + &dev_attr_write.attr, +#endif + NULL +}; + +static const struct attribute_group adxl34x_attr_group = { + .attrs = adxl34x_attributes, +}; + +static int adxl34x_input_open(struct input_dev *input) +{ + struct adxl34x *ac = input_get_drvdata(input); + + mutex_lock(&ac->mutex); + ac->opened = 1; + mutex_unlock(&ac->mutex); + + adxl34x_enable(ac); + + return 0; +} + +static void adxl34x_input_close(struct input_dev *input) +{ + struct adxl34x *ac = input_get_drvdata(input); + + adxl34x_disable(ac); + + mutex_lock(&ac->mutex); + ac->opened = 0; + mutex_unlock(&ac->mutex); +} + +int adxl34x_probe(struct adxl34x **pac, struct device *dev, u16 bus_type, + int irq, int fifo_delay_default, adxl34x_read_t read, + adxl34x_read_block_t read_block, adxl34x_write_t write) +{ + struct adxl34x *ac; + struct input_dev *input_dev; + struct adxl34x_platform_data *pdata; + int err, range; + unsigned char revid; + + if (!irq) { + dev_err(dev, "no IRQ?\n"); + return -ENODEV; + } + + *pac = ac = kzalloc(sizeof(*ac), GFP_KERNEL); + if (!ac) + return -ENOMEM; + ac->fifo_delay = fifo_delay_default; + + pdata = dev->platform_data; + if (!pdata) { + dev_dbg(dev, + "No platfrom data: Using default initialization\n"); + pdata = (struct adxl34x_platform_data *)&adxl34x_default_init; + } + memcpy(&ac->pdata, pdata, sizeof(*pdata)); + pdata = &ac->pdata; + + input_dev = input_allocate_device(); + if (!input_dev) + return -ENOMEM; + + ac->input = input_dev; + ac->disabled = 1; + ac->dev = dev; + ac->irq = irq; + ac->write = write; + ac->read = read; + ac->read_block = read_block; + + INIT_WORK(&ac->work, adxl34x_work); + mutex_init(&ac->mutex); + + input_dev->name = "ADXL34x accelerometer"; + revid = ac->read(dev, DEVID); + + switch (revid) { + case ID_ADXL345: + ac->model = 345; + break; + case ID_ADXL346: + ac->model = 346; + break; + default: + dev_err(dev, "Failed to probe %s\n", input_dev->name); + err = -ENODEV; + goto err_free_mem; + } + + snprintf(ac->phys, sizeof(ac->phys), "%s/input0", dev_name(dev)); + + input_dev->phys = ac->phys; + input_dev->dev.parent = dev; + input_dev->id.product = ac->model; + input_dev->id.bustype = bus_type; + input_dev->open = adxl34x_input_open; + input_dev->close = adxl34x_input_close; + + input_set_drvdata(input_dev, ac); + + __set_bit(ac->pdata.ev_type, input_dev->evbit); + + if (ac->pdata.ev_type == EV_REL) { + __set_bit(REL_X, input_dev->relbit); + __set_bit(REL_Y, input_dev->relbit); + __set_bit(REL_Z, input_dev->relbit); + } else { + /* EV_ABS */ + __set_bit(ABS_X, input_dev->absbit); + __set_bit(ABS_Y, input_dev->absbit); + __set_bit(ABS_Z, input_dev->absbit); + + if (pdata->data_range & FULL_RES) + range = ADXL_FULLRES_MAX_VAL; /* Signed 13-bit */ + else + range = ADXL_FIXEDRES_MAX_VAL; /* Signed 10-bit */ + + input_set_abs_params(input_dev, ABS_X, -range, range, 3, 3); + input_set_abs_params(input_dev, ABS_Y, -range, range, 3, 3); + input_set_abs_params(input_dev, ABS_Z, -range, range, 3, 3); + } + + __set_bit(EV_KEY, input_dev->evbit); + __set_bit(pdata->ev_code_tap_x, input_dev->keybit); + __set_bit(pdata->ev_code_tap_y, input_dev->keybit); + __set_bit(pdata->ev_code_tap_z, input_dev->keybit); + + if (pdata->ev_code_ff) { + ac->int_mask = FREE_FALL; + __set_bit(pdata->ev_code_ff, input_dev->keybit); + } + + if (pdata->ev_code_act_inactivity) + __set_bit(pdata->ev_code_act_inactivity, input_dev->keybit); + + ac->int_mask |= ACTIVITY | INACTIVITY; + + if (pdata->watermark) { + ac->int_mask |= WATERMARK; + if (!FIFO_MODE(pdata->fifo_mode)) + pdata->fifo_mode |= FIFO_STREAM; + } else { + ac->int_mask |= DATA_READY; + } + + if (pdata->tap_axis_control & (TAP_X_EN | TAP_Y_EN | TAP_Z_EN)) + ac->int_mask |= SINGLE_TAP | DOUBLE_TAP; + + if (FIFO_MODE(pdata->fifo_mode) == FIFO_BYPASS) + ac->fifo_delay = 0; + + ac->write(dev, POWER_CTL, 0); + + err = request_irq(ac->irq, adxl34x_irq, + IRQF_TRIGGER_HIGH, dev_name(dev), ac); + if (err) { + dev_err(dev, "irq %d busy?\n", ac->irq); + goto err_free_mem; + } + + err = sysfs_create_group(&dev->kobj, &adxl34x_attr_group); + if (err) + goto err_free_irq; + + err = input_register_device(input_dev); + if (err) + goto err_remove_attr; + + AC_WRITE(ac, THRESH_TAP, pdata->tap_threshold); + AC_WRITE(ac, OFSX, pdata->x_axis_offset); + ac->hwcal.x = pdata->x_axis_offset; + AC_WRITE(ac, OFSY, pdata->y_axis_offset); + ac->hwcal.y = pdata->y_axis_offset; + AC_WRITE(ac, OFSZ, pdata->z_axis_offset); + ac->hwcal.z = pdata->z_axis_offset; + AC_WRITE(ac, THRESH_TAP, pdata->tap_threshold); + AC_WRITE(ac, DUR, pdata->tap_duration); + AC_WRITE(ac, LATENT, pdata->tap_latency); + AC_WRITE(ac, WINDOW, pdata->tap_window); + AC_WRITE(ac, THRESH_ACT, pdata->activity_threshold); + AC_WRITE(ac, THRESH_INACT, pdata->inactivity_threshold); + AC_WRITE(ac, TIME_INACT, pdata->inactivity_time); + AC_WRITE(ac, THRESH_FF, pdata->free_fall_threshold); + AC_WRITE(ac, TIME_FF, pdata->free_fall_time); + AC_WRITE(ac, TAP_AXES, pdata->tap_axis_control); + AC_WRITE(ac, ACT_INACT_CTL, pdata->act_axis_control); + AC_WRITE(ac, BW_RATE, RATE(ac->pdata.data_rate) | + (pdata->low_power_mode ? LOW_POWER : 0)); + AC_WRITE(ac, DATA_FORMAT, pdata->data_range); + AC_WRITE(ac, FIFO_CTL, FIFO_MODE(pdata->fifo_mode) | + SAMPLES(pdata->watermark)); + + if (pdata->use_int2) + /* Map all INTs to INT2 */ + AC_WRITE(ac, INT_MAP, ac->int_mask | OVERRUN); + else + /* Map all INTs to INT1 */ + AC_WRITE(ac, INT_MAP, 0); + + AC_WRITE(ac, INT_ENABLE, ac->int_mask | OVERRUN); + + pdata->power_mode &= (PCTL_AUTO_SLEEP | PCTL_LINK); + + dev_info(dev, "ADXL%d accelerometer, irq %d\n", + ac->model, ac->irq); + + return 0; + + err_remove_attr: + sysfs_remove_group(&dev->kobj, &adxl34x_attr_group); + err_free_irq: + free_irq(ac->irq, ac); + err_free_mem: + input_free_device(input_dev); + + return err; +} +EXPORT_SYMBOL_GPL(adxl34x_probe); + +int adxl34x_remove(struct adxl34x *ac) +{ + adxl34x_disable(ac); + sysfs_remove_group(&ac->dev->kobj, &adxl34x_attr_group); + free_irq(ac->irq, ac); + input_unregister_device(ac->input); + dev_dbg(ac->dev, "unregistered accelerometer\n"); + kfree(ac); + + return 0; +} +EXPORT_SYMBOL_GPL(adxl34x_remove); + +/* Stub functions so we can load/unload the module */ +static __init int adxl34x_init(void) +{ + return 0; +} +module_init(adxl34x_init); + +static __exit void adxl34x_exit(void) +{ +} +module_exit(adxl34x_exit); + +MODULE_AUTHOR("Michael Hennerich <hennerich@xxxxxxxxxxxxxxxxxxxx>"); +MODULE_DESCRIPTION("ADXL345/346 Three-Axis Digital Accelerometer Driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/input/misc/adxl34x.h b/drivers/input/misc/adxl34x.h new file mode 100644 index 0000000..92ef77c --- /dev/null +++ b/drivers/input/misc/adxl34x.h @@ -0,0 +1,26 @@ +/* + * ADXL345/346 Three-Axis Digital Accelerometers (I2C/SPI Interface) + * + * Enter bugs at http://blackfin.uclinux.org/ + * + * Copyright (C) 2009 Michael Hennerich, Analog Devices Inc. + * Licensed under the GPL-2 or later. + */ + +#ifndef _ADXL34X_H_ +#define _ADXL34X_H_ + +struct device; +struct adxl34x; +typedef int (adxl34x_read_t) (struct device *, unsigned char); +typedef int (adxl34x_read_block_t) (struct device *, unsigned char, int, unsigned char *); +typedef int (adxl34x_write_t) (struct device *, unsigned char, unsigned char); + +void adxl34x_disable(struct adxl34x *ac); +void adxl34x_enable(struct adxl34x *ac); +int adxl34x_probe(struct adxl34x **pac, struct device *dev, u16 bus_type, + int irq, int fifo_delay_default, adxl34x_read_t read, + adxl34x_read_block_t read_block, adxl34x_write_t write); +int adxl34x_remove(struct adxl34x *ac); + +#endif diff --git a/include/linux/input/adxl34x.h b/include/linux/input/adxl34x.h new file mode 100644 index 0000000..2e7e807 --- /dev/null +++ b/include/linux/input/adxl34x.h @@ -0,0 +1,295 @@ +/* + * include/linux/input/adxl34x.h + * + * Digital Accelerometer characteristics are highly application specific + * and may vary between boards and models. The platform_data for the + * device's "struct device" holds this information. + * + * Copyright 2009 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#ifndef __LINUX_INPUT_ADXL34X_H__ +#define __LINUX_INPUT_ADXL34X_H__ + +struct adxl34x_platform_data { + + /* + * X,Y,Z Axis Offset: + * offer user offset adjustments in twoscompliment + * form with a scale factor of 15.6 mg/LSB (i.e. 0x7F = +2 g) + */ + + char x_axis_offset; + char y_axis_offset; + char z_axis_offset; + + /* + * TAP_X/Y/Z Enable: Setting TAP_X, Y, or Z Enable enables X, + * Y, or Z participation in Tap detection. A '0' excludes the + * selected axis from participation in Tap detection. + * Setting the SUPPRESS bit suppresses Double Tap detection if + * acceleration greater than tap_threshold is present between + * taps. + */ + +#define ADXL_SUPPRESS (1 << 3) +#define ADXL_TAP_X_EN (1 << 2) +#define ADXL_TAP_Y_EN (1 << 1) +#define ADXL_TAP_Z_EN (1 << 0) + + unsigned char tap_axis_control; + + /* + * tap_threshold: + * holds the threshold value for tap detection/interrupts. + * The data format is unsigned. The scale factor is 62.5 mg/LSB + * (i.e. 0xFF = +16 g). A zero value may result in undesirable + * behavior if Tap/Double Tap is enabled. + */ + + unsigned char tap_threshold; + + /* + * tap_duration: + * is an unsigned time value representing the maximum + * time that an event must be above the tap_threshold threshold + * to qualify as a tap event. The scale factor is 625 us/LSB. A zero + * value will prevent Tap/Double Tap functions from working. + */ + + unsigned char tap_duration; + + /* + * tap_latency: + * is an unsigned time value representing the wait time + * from the detection of a tap event to the opening of the time + * window tap_window for a possible second tap event. The scale + * factor is 1.25 ms/LSB. A zero value will disable the Double Tap + * function. + */ + + unsigned char tap_latency; + + /* + * tap_window: + * is an unsigned time value representing the amount + * of time after the expiration of tap_latency during which a second + * tap can begin. The scale factor is 1.25 ms/LSB. A zero value will + * disable the Double Tap function. + */ + + unsigned char tap_window; + + /* + * act_axis_control: + * X/Y/Z Enable: A '1' enables X, Y, or Z participation in activity + * or inactivity detection. A '0' excludes the selected axis from + * participation. If all of the axes are excluded, the function is + * disabled. + * AC/DC: A '0' = DC coupled operation and a '1' = AC coupled + * operation. In DC coupled operation, the current acceleration is + * compared with activity_threshold and inactivity_threshold directly + * to determine whether activity or inactivity is detected. In AC + * coupled operation for activity detection, the acceleration value + * at the start of activity detection is taken as a reference value. + * New samples of acceleration are then compared to this + * reference value and if the magnitude of the difference exceeds + * activity_threshold the device will trigger an activity interrupt. In + * AC coupled operation for inactivity detection, a reference value + * is used again for comparison and is updated whenever the + * device exceeds the inactivity threshold. Once the reference + * value is selected, the device compares the magnitude of the + * difference between the reference value and the current + * acceleration with inactivity_threshold. If the difference is below + * inactivity_threshold for a total of inactivity_time, the device is + * considered inactive and the inactivity interrupt is triggered. + */ + +#define ADXL_ACT_ACDC (1 << 7) +#define ADXL_ACT_X_EN (1 << 6) +#define ADXL_ACT_Y_EN (1 << 5) +#define ADXL_ACT_Z_EN (1 << 4) +#define ADXL_INACT_ACDC (1 << 3) +#define ADXL_INACT_X_EN (1 << 2) +#define ADXL_INACT_Y_EN (1 << 1) +#define ADXL_INACT_Z_EN (1 << 0) + + unsigned char act_axis_control; + + /* + * activity_threshold: + * holds the threshold value for activity detection. + * The data format is unsigned. The scale factor is + * 62.5 mg/LSB. A zero value may result in undesirable behavior if + * Activity interrupt is enabled. + */ + + unsigned char activity_threshold; + + /* + * inactivity_threshold: + * holds the threshold value for inactivity + * detection. The data format is unsigned. The scale + * factor is 62.5 mg/LSB. A zero value may result in undesirable + * behavior if Inactivity interrupt is enabled. + */ + + unsigned char inactivity_threshold; + + /* + * inactivity_time: + * is an unsigned time value representing the + * amount of time that acceleration must be below the value in + * inactivity_threshold for inactivity to be declared. The scale factor + * is 1 second/LSB. Unlike the other interrupt functions, which + * operate on unfiltered data, the inactivity function operates on the + * filtered output data. At least one output sample must be + * generated for the inactivity interrupt to be triggered. This will + * result in the function appearing un-responsive if the + * inactivity_time register is set with a value less than the time + * constant of the Output Data Rate. A zero value will result in an + * interrupt when the output data is below inactivity_threshold. + */ + + unsigned char inactivity_time; + + /* + * free_fall_threshold: + * holds the threshold value for Free-Fall detection. + * The data format is unsigned. The root-sum-square(RSS) value + * of all axes is calculated and compared to the value in + * free_fall_threshold to determine if a free fall event may be + * occurring. The scale factor is 62.5 mg/LSB. A zero value may + * result in undesirable behavior if Free-Fall interrupt is + * enabled. Values between 300 and 600 mg (0x05 to 0x09) are + * recommended. + */ + + unsigned char free_fall_threshold; + + /* + * free_fall_time: + * is an unsigned time value representing the minimum + * time that the RSS value of all axes must be less than + * free_fall_threshold to generate a Free-Fall interrupt. The + * scale factor is 5 ms/LSB. A zero value may result in + * undesirable behavior if Free-Fall interrupt is enabled. + * Values between 100 to 350 ms (0x14 to 0x46) are recommended. + */ + + unsigned char free_fall_time; + + /* + * data_rate: + * Selects device bandwidth and output data rate. + * RATE = 3200 Hz / (2^(15 - x)). Default value is 0x0A, or 100 Hz + * Output Data Rate. An Output Data Rate should be selected that + * is appropriate for the communication protocol and frequency + * selected. Selecting too high of an Output Data Rate with a low + * communication speed will result in samples being discarded. + */ + + unsigned char data_rate; + + /* + * data_range: + * FULL_RES: When this bit is set with the device is + * in Full-Resolution Mode, where the output resolution increases + * with RANGE to maintain a 4 mg/LSB scale factor. When this + * bit is cleared the device is in 10-bit Mode and RANGE determine the + * maximum g-Range and scale factor. + */ + +#define ADXL_FULL_RES (1 << 3) +#define ADXL_RANGE_PM_2g 0 +#define ADXL_RANGE_PM_4g 1 +#define ADXL_RANGE_PM_8g 2 +#define ADXL_RANGE_PM_16g 3 + + unsigned char data_range; + + /* + * low_power_mode: + * A '0' = Normal operation and a '1' = Reduced + * power operation with somewhat higher noise. + */ + + unsigned char low_power_mode; + + /* + * power_mode: + * LINK: A '1' with both the activity and inactivity functions + * enabled will delay the start of the activity function until + * inactivity is detected. Once activity is detected, inactivity + * detection will begin and prevent the detection of activity. This + * bit serially links the activity and inactivity functions. When '0' + * the inactivity and activity functions are concurrent. Additional + * information can be found in the Application section under Link + * Mode. + * AUTO_SLEEP: A '1' sets the ADXL34x to switch to Sleep Mode + * when inactivity (acceleration has been below inactivity_threshold + * for at least inactivity_time) is detected and the LINK bit is set. + * A '0' disables automatic switching to Sleep Mode. See SLEEP + * for further description. + */ + +#define ADXL_LINK (1 << 5) +#define ADXL_AUTO_SLEEP (1 << 4) + + unsigned char power_mode; + + /* + * fifo_mode: + * BYPASS The FIFO is bypassed + * FIFO FIFO collects up to 32 values then stops collecting data + * STREAM FIFO holds the last 32 data values. Once full, the FIFO's + * oldest data is lost as it is replaced with newer data + * + * DEFAULT should be ADXL_FIFO_STREAM + */ + +#define ADXL_FIFO_BYPASS 0 +#define ADXL_FIFO_FIFO 1 +#define ADXL_FIFO_STREAM 2 + + unsigned char fifo_mode; + + /* + * watermark: + * The Watermark feature can be used to reduce the interrupt load + * of the system. The FIFO fills up to the value stored in watermark + * [1..32] and then generates an interrupt. + * A '0' disables the watermark feature. + */ + + unsigned char watermark; + + unsigned int ev_type; /* EV_ABS or EV_REL */ + + unsigned int ev_code_x; /* ABS_X,Y,Z or REL_X,Y,Z */ + unsigned int ev_code_y; /* ABS_X,Y,Z or REL_X,Y,Z */ + unsigned int ev_code_z; /* ABS_X,Y,Z or REL_X,Y,Z */ + + /* + * A valid BTN or KEY Code; use tap_axis_control to disable + * event reporting + */ + + unsigned int ev_code_tap_x; /* EV_KEY */ + unsigned int ev_code_tap_y; /* EV_KEY */ + unsigned int ev_code_tap_z; /* EV_KEY */ + + /* + * A valid BTN or KEY Code for Free-Fall or Activity enables + * input event reporting. A '0' disables the Free-Fall or + * Activity reporting. + */ + + unsigned int ev_code_ff; /* EV_KEY */ + unsigned int ev_code_act_inactivity; /* EV_KEY */ + + unsigned char use_int2; +}; +#endif -- 1.6.5 -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
