diff options
Diffstat (limited to 'drivers/staging/iio/gyro/adis16080_core.c')
-rw-r--r-- | drivers/staging/iio/gyro/adis16080_core.c | 163 |
1 files changed, 50 insertions, 113 deletions
diff --git a/drivers/staging/iio/gyro/adis16080_core.c b/drivers/staging/iio/gyro/adis16080_core.c index 0efb768db7d3..fb4336c7d2a6 100644 --- a/drivers/staging/iio/gyro/adis16080_core.c +++ b/drivers/staging/iio/gyro/adis16080_core.c @@ -5,9 +5,6 @@ * * 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> @@ -16,20 +13,40 @@ #include <linux/spi/spi.h> #include <linux/slab.h> #include <linux/sysfs.h> -#include <linux/list.h> #include "../iio.h" #include "../sysfs.h" #include "gyro.h" #include "../adc/adc.h" -#include "adis16080.h" +#define ADIS16080_DIN_GYRO (0 << 10) /* Gyroscope output */ +#define ADIS16080_DIN_TEMP (1 << 10) /* Temperature output */ +#define ADIS16080_DIN_AIN1 (2 << 10) +#define ADIS16080_DIN_AIN2 (3 << 10) -#define DRIVER_NAME "adis16080" +/* + * 1: Write contents on DIN to control register. + * 0: No changes to control register. + */ -struct adis16080_state *adis16080_st; +#define ADIS16080_DIN_WRITE (1 << 15) + +/** + * struct adis16080_state - device instance specific data + * @us: actual spi_device to write data + * @indio_dev: industrial I/O device structure + * @buf: transmit or recieve buffer + * @buf_lock: mutex to protect tx and rx + **/ +struct adis16080_state { + struct spi_device *us; + struct iio_dev *indio_dev; + struct mutex buf_lock; + + u8 buf[2] ____cacheline_aligned; +}; -int adis16080_spi_write(struct device *dev, +static int adis16080_spi_write(struct device *dev, u16 val) { int ret; @@ -37,16 +54,16 @@ int adis16080_spi_write(struct device *dev, struct adis16080_state *st = iio_dev_get_devdata(indio_dev); mutex_lock(&st->buf_lock); - st->tx[0] = val >> 8; - st->tx[1] = val; + st->buf[0] = val >> 8; + 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 adis16080_spi_read(struct device *dev, +static int adis16080_spi_read(struct device *dev, u16 *val) { int ret; @@ -55,10 +72,10 @@ int adis16080_spi_read(struct device *dev, mutex_lock(&st->buf_lock); - ret = spi_read(st->us, st->rx, 2); + ret = spi_read(st->us, st->buf, 2); if (ret == 0) - *val = ((st->rx[0] & 0xF) << 8) | st->rx[1]; + *val = ((st->buf[0] & 0xF) << 8) | st->buf[1]; mutex_unlock(&st->buf_lock); return ret; @@ -68,13 +85,19 @@ static ssize_t adis16080_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); - u16 val; + u16 val = 0; ssize_t ret; /* Take the iio_dev status lock */ mutex_lock(&indio_dev->mlock); + ret = adis16080_spi_write(dev, + this_attr->address | ADIS16080_DIN_WRITE); + if (ret < 0) + goto error_ret; ret = adis16080_spi_read(dev, &val); +error_ret: mutex_unlock(&indio_dev->mlock); if (ret == 0) @@ -82,46 +105,18 @@ static ssize_t adis16080_read(struct device *dev, else return ret; } - -static ssize_t adis16080_write(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - int ret; - long val; - - ret = strict_strtol(buf, 16, &val); - if (ret) - goto error_ret; - ret = adis16080_spi_write(dev, val); - -error_ret: - return ret ? ret : len; -} - -#define IIO_DEV_ATTR_IN(_show) \ - IIO_DEVICE_ATTR(in, S_IRUGO, _show, NULL, 0) - -#define IIO_DEV_ATTR_OUT(_store) \ - IIO_DEVICE_ATTR(out, S_IRUGO, NULL, _store, 0) - -static IIO_DEV_ATTR_IN(adis16080_read); -static IIO_DEV_ATTR_OUT(adis16080_write); - +static IIO_DEV_ATTR_GYRO_Z(adis16080_read, ADIS16080_DIN_GYRO); +static IIO_DEVICE_ATTR(temp_raw, S_IRUGO, adis16080_read, NULL, + ADIS16080_DIN_TEMP); +static IIO_DEV_ATTR_IN_RAW(0, adis16080_read, ADIS16080_DIN_AIN1); +static IIO_DEV_ATTR_IN_RAW(1, adis16080_read, ADIS16080_DIN_AIN2); static IIO_CONST_ATTR(name, "adis16080"); -static struct attribute *adis16080_event_attributes[] = { - NULL -}; - -static struct attribute_group adis16080_event_attribute_group = { - .attrs = adis16080_event_attributes, -}; - static struct attribute *adis16080_attributes[] = { - &iio_dev_attr_in.dev_attr.attr, - &iio_dev_attr_out.dev_attr.attr, + &iio_dev_attr_gyro_z_raw.dev_attr.attr, + &iio_dev_attr_temp_raw.dev_attr.attr, + &iio_dev_attr_in0_raw.dev_attr.attr, + &iio_dev_attr_in1_raw.dev_attr.attr, &iio_const_attr_name.dev_attr.attr, NULL }; @@ -142,81 +137,33 @@ static int __devinit adis16080_probe(struct spi_device *spi) spi_set_drvdata(spi, st); /* Allocate the comms buffers */ - st->rx = kzalloc(sizeof(*st->rx)*ADIS16080_MAX_RX, GFP_KERNEL); - if (st->rx == NULL) { - ret = -ENOMEM; - goto error_free_st; - } - st->tx = kzalloc(sizeof(*st->tx)*ADIS16080_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 = &adis16080_event_attribute_group; st->indio_dev->attrs = &adis16080_attribute_group; st->indio_dev->dev_data = (void *)(st); st->indio_dev->driver_module = THIS_MODULE; st->indio_dev->modes = INDIO_DIRECT_MODE; - ret = adis16080_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; + goto error_free_dev; regdone = 1; - ret = adis16080_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, - "adis16080"); - if (ret) - goto error_uninitialize_ring; - - ret = adis16080_probe_trigger(st->indio_dev); - if (ret) - goto error_unregister_line; - } - - adis16080_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: - adis16080_uninitialize_ring(st->indio_dev->ring); -error_unreg_ring_funcs: - adis16080_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); error_free_st: kfree(st); error_ret: @@ -229,17 +176,7 @@ static int adis16080_remove(struct spi_device *spi) struct adis16080_state *st = spi_get_drvdata(spi); struct iio_dev *indio_dev = st->indio_dev; - flush_scheduled_work(); - - adis16080_remove_trigger(indio_dev); - if (spi->irq && gpio_is_valid(irq_to_gpio(spi->irq)) > 0) - iio_unregister_interrupt_line(indio_dev, 0); - - adis16080_uninitialize_ring(indio_dev->ring); - adis16080_unconfigure_ring(indio_dev); iio_device_unregister(indio_dev); - kfree(st->tx); - kfree(st->rx); kfree(st); return 0; @@ -267,5 +204,5 @@ static __exit void adis16080_exit(void) module_exit(adis16080_exit); MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); -MODULE_DESCRIPTION("Analog Devices ADIS16080/100 Yaw Rate Gyroscope with SPI driver"); +MODULE_DESCRIPTION("Analog Devices ADIS16080/100 Yaw Rate Gyroscope Driver"); MODULE_LICENSE("GPL v2"); |