diff options
Diffstat (limited to 'drivers/staging/iio/gyro/adis16130_core.c')
-rw-r--r-- | drivers/staging/iio/gyro/adis16130_core.c | 207 |
1 files changed, 75 insertions, 132 deletions
diff --git a/drivers/staging/iio/gyro/adis16130_core.c b/drivers/staging/iio/gyro/adis16130_core.c index 49ffc7b26e8a..70e2831f8fb8 100644 --- a/drivers/staging/iio/gyro/adis16130_core.c +++ b/drivers/staging/iio/gyro/adis16130_core.c @@ -6,9 +6,6 @@ * Licensed under the GPL-2 or later. */ -#include <linux/interrupt.h> -#include <linux/irq.h> -#include <linux/gpio.h> #include <linux/delay.h> #include <linux/mutex.h> #include <linux/device.h> @@ -23,13 +20,41 @@ #include "gyro.h" #include "../adc/adc.h" -#include "adis16130.h" - -#define DRIVER_NAME "adis16130" - -struct adis16130_state *adis16130_st; +#define ADIS16130_CON 0x0 +#define ADIS16130_CON_RD (1 << 6) +#define ADIS16130_IOP 0x1 + +/* 1 = data-ready signal low when unread data on all channels; */ +#define ADIS16130_IOP_ALL_RDY (1 << 3) +#define ADIS16130_IOP_SYNC (1 << 0) /* 1 = synchronization enabled */ +#define ADIS16130_RATEDATA 0x8 /* Gyroscope output, rate of rotation */ +#define ADIS16130_TEMPDATA 0xA /* Temperature output */ +#define ADIS16130_RATECS 0x28 /* Gyroscope channel setup */ +#define ADIS16130_RATECS_EN (1 << 3) /* 1 = channel enable; */ +#define ADIS16130_TEMPCS 0x2A /* Temperature channel setup */ +#define ADIS16130_TEMPCS_EN (1 << 3) +#define ADIS16130_RATECONV 0x30 +#define ADIS16130_TEMPCONV 0x32 +#define ADIS16130_MODE 0x38 +#define ADIS16130_MODE_24BIT (1 << 1) /* 1 = 24-bit resolution; */ + +/** + * struct adis16130_state - device instance specific data + * @us: actual spi_device to write data + * @indio_dev: industrial I/O device structure + * @mode: 24 bits (1) or 16 bits (0) + * @buf_lock: mutex to protect tx and rx + * @buf: unified tx/rx buffer + **/ +struct adis16130_state { + struct spi_device *us; + struct iio_dev *indio_dev; + u32 mode; + struct mutex buf_lock; + u8 buf[4] ____cacheline_aligned; +}; -int adis16130_spi_write(struct device *dev, u8 reg_addr, +static int adis16130_spi_write(struct device *dev, u8 reg_addr, u8 val) { int ret; @@ -37,16 +62,16 @@ int adis16130_spi_write(struct device *dev, u8 reg_addr, struct adis16130_state *st = iio_dev_get_devdata(indio_dev); mutex_lock(&st->buf_lock); - st->tx[0] = reg_addr; - st->tx[1] = val; + st->buf[0] = reg_addr; + st->buf[1] = val; - ret = spi_write(st->us, st->tx, 2); + ret = spi_write(st->us, st->buf, 2); mutex_unlock(&st->buf_lock); return ret; } -int adis16130_spi_read(struct device *dev, u8 reg_addr, +static int adis16130_spi_read(struct device *dev, u8 reg_addr, u32 *val) { int ret; @@ -55,17 +80,19 @@ int adis16130_spi_read(struct device *dev, u8 reg_addr, mutex_lock(&st->buf_lock); - st->tx[0] = ADIS16130_CON_RD | reg_addr; + st->buf[0] = ADIS16130_CON_RD | reg_addr; if (st->mode) - ret = spi_read(st->us, st->rx, 4); + ret = spi_read(st->us, st->buf, 4); else - ret = spi_read(st->us, st->rx, 3); + ret = spi_read(st->us, st->buf, 3); if (ret == 0) { if (st->mode) - *val = (st->rx[1] << 16) | (st->rx[2] << 8) | st->rx[3]; + *val = (st->buf[1] << 16) | + (st->buf[2] << 8) | + st->buf[3]; else - *val = (st->rx[1] << 8) | st->rx[2]; + *val = (st->buf[1] << 8) | st->buf[2]; } mutex_unlock(&st->buf_lock); @@ -73,36 +100,18 @@ int adis16130_spi_read(struct device *dev, u8 reg_addr, return ret; } -static ssize_t adis16130_gyro_read(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *indio_dev = dev_get_drvdata(dev); - u32 val; - ssize_t ret; - - /* Take the iio_dev status lock */ - mutex_lock(&indio_dev->mlock); - ret = adis16130_spi_read(dev, ADIS16130_RATEDATA, &val); - mutex_unlock(&indio_dev->mlock); - - if (ret == 0) - return sprintf(buf, "%d\n", val); - else - return ret; -} - -static ssize_t adis16130_temp_read(struct device *dev, +static ssize_t adis16130_val_read(struct device *dev, struct device_attribute *attr, char *buf) { + struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); struct iio_dev *indio_dev = dev_get_drvdata(dev); u32 val; ssize_t ret; /* Take the iio_dev status lock */ mutex_lock(&indio_dev->mlock); - ret = adis16130_spi_read(dev, ADIS16130_TEMPDATA, &val); + ret = adis16130_spi_read(dev, this_attr->address, &val); mutex_unlock(&indio_dev->mlock); if (ret == 0) @@ -118,7 +127,10 @@ static ssize_t adis16130_bitsmode_read(struct device *dev, struct iio_dev *indio_dev = dev_get_drvdata(dev); struct adis16130_state *st = iio_dev_get_devdata(indio_dev); - return sprintf(buf, "%d\n", st->mode); + if (st->mode == 1) + return sprintf(buf, "s24\n"); + else + return sprintf(buf, "s16\n"); } static ssize_t adis16130_bitsmode_write(struct device *dev, @@ -127,43 +139,38 @@ static ssize_t adis16130_bitsmode_write(struct device *dev, size_t len) { int ret; - long val; + u8 val; - ret = strict_strtol(buf, 16, &val); - if (ret) - goto error_ret; - ret = adis16130_spi_write(dev, ADIS16130_MODE, !!val); + if (sysfs_streq(buf, "s16")) + val = 0; + else if (sysfs_streq(buf, "s24")) + val = 1; + else + return -EINVAL; + + ret = adis16130_spi_write(dev, ADIS16130_MODE, val); -error_ret: return ret ? ret : len; } - -static IIO_DEV_ATTR_TEMP_RAW(adis16130_temp_read); +static IIO_DEVICE_ATTR(temp_raw, S_IRUGO, adis16130_val_read, NULL, + ADIS16130_TEMPDATA); static IIO_CONST_ATTR(name, "adis16130"); -static IIO_DEV_ATTR_GYRO(adis16130_gyro_read, - ADIS16130_RATEDATA); - -#define IIO_DEV_ATTR_BITS_MODE(_mode, _show, _store, _addr) \ - IIO_DEVICE_ATTR(bits_mode, _mode, _show, _store, _addr) +static IIO_DEV_ATTR_GYRO_Z(adis16130_val_read, ADIS16130_RATEDATA); -static IIO_DEV_ATTR_BITS_MODE(S_IWUSR | S_IRUGO, adis16130_bitsmode_read, adis16130_bitsmode_write, +static IIO_DEVICE_ATTR(gyro_z_type, S_IWUSR | S_IRUGO, adis16130_bitsmode_read, + adis16130_bitsmode_write, ADIS16130_MODE); -static struct attribute *adis16130_event_attributes[] = { - NULL -}; - -static struct attribute_group adis16130_event_attribute_group = { - .attrs = adis16130_event_attributes, -}; +static IIO_CONST_ATTR(gyro_z_type_available, "s16 s24"); static struct attribute *adis16130_attributes[] = { &iio_dev_attr_temp_raw.dev_attr.attr, &iio_const_attr_name.dev_attr.attr, - &iio_dev_attr_gyro_raw.dev_attr.attr, - &iio_dev_attr_bits_mode.dev_attr.attr, + &iio_dev_attr_gyro_z_raw.dev_attr.attr, + &iio_dev_attr_gyro_z_type.dev_attr.attr, + &iio_const_attr_gyro_z_type_available.dev_attr.attr, NULL }; @@ -173,7 +180,7 @@ static const struct attribute_group adis16130_attribute_group = { static int __devinit adis16130_probe(struct spi_device *spi) { - int ret, regdone = 0; + int ret; struct adis16130_state *st = kzalloc(sizeof *st, GFP_KERNEL); if (!st) { ret = -ENOMEM; @@ -181,84 +188,30 @@ static int __devinit adis16130_probe(struct spi_device *spi) } /* this is only used for removal purposes */ spi_set_drvdata(spi, st); - - /* Allocate the comms buffers */ - st->rx = kzalloc(sizeof(*st->rx)*ADIS16130_MAX_RX, GFP_KERNEL); - if (st->rx == NULL) { - ret = -ENOMEM; - goto error_free_st; - } - st->tx = kzalloc(sizeof(*st->tx)*ADIS16130_MAX_TX, GFP_KERNEL); - if (st->tx == NULL) { - ret = -ENOMEM; - goto error_free_rx; - } st->us = spi; mutex_init(&st->buf_lock); /* setup the industrialio driver allocated elements */ st->indio_dev = iio_allocate_device(); if (st->indio_dev == NULL) { ret = -ENOMEM; - goto error_free_tx; + goto error_free_st; } st->indio_dev->dev.parent = &spi->dev; - st->indio_dev->num_interrupt_lines = 1; - st->indio_dev->event_attrs = &adis16130_event_attribute_group; st->indio_dev->attrs = &adis16130_attribute_group; st->indio_dev->dev_data = (void *)(st); st->indio_dev->driver_module = THIS_MODULE; st->indio_dev->modes = INDIO_DIRECT_MODE; st->mode = 1; - ret = adis16130_configure_ring(st->indio_dev); - if (ret) - goto error_free_dev; - ret = iio_device_register(st->indio_dev); if (ret) - goto error_unreg_ring_funcs; - regdone = 1; - - ret = adis16130_initialize_ring(st->indio_dev->ring); - if (ret) { - printk(KERN_ERR "failed to initialize the ring\n"); - goto error_unreg_ring_funcs; - } - - if (spi->irq && gpio_is_valid(irq_to_gpio(spi->irq)) > 0) { - ret = iio_register_interrupt_line(spi->irq, - st->indio_dev, - 0, - IRQF_TRIGGER_RISING, - "adis16130"); - if (ret) - goto error_uninitialize_ring; - - ret = adis16130_probe_trigger(st->indio_dev); - if (ret) - goto error_unregister_line; - } + goto error_free_dev; - adis16130_st = st; return 0; -error_unregister_line: - if (st->indio_dev->modes & INDIO_RING_TRIGGERED) - iio_unregister_interrupt_line(st->indio_dev, 0); -error_uninitialize_ring: - adis16130_uninitialize_ring(st->indio_dev->ring); -error_unreg_ring_funcs: - adis16130_unconfigure_ring(st->indio_dev); error_free_dev: - if (regdone) - iio_device_unregister(st->indio_dev); - else - iio_free_device(st->indio_dev); -error_free_tx: - kfree(st->tx); -error_free_rx: - kfree(st->rx); + iio_free_device(st->indio_dev); error_free_st: kfree(st); error_ret: @@ -271,17 +224,7 @@ static int adis16130_remove(struct spi_device *spi) struct adis16130_state *st = spi_get_drvdata(spi); struct iio_dev *indio_dev = st->indio_dev; - flush_scheduled_work(); - - adis16130_remove_trigger(indio_dev); - if (spi->irq && gpio_is_valid(irq_to_gpio(spi->irq)) > 0) - iio_unregister_interrupt_line(indio_dev, 0); - - adis16130_uninitialize_ring(indio_dev->ring); - adis16130_unconfigure_ring(indio_dev); iio_device_unregister(indio_dev); - kfree(st->tx); - kfree(st->rx); kfree(st); return 0; @@ -309,5 +252,5 @@ static __exit void adis16130_exit(void) module_exit(adis16130_exit); MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); -MODULE_DESCRIPTION("Analog Devices ADIS16130 High Precision Angular Rate Sensor driver"); +MODULE_DESCRIPTION("Analog Devices ADIS16130 High Precision Angular Rate"); MODULE_LICENSE("GPL v2"); |