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path: root/drivers/staging/iio/gyro/adis16080_core.c
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Diffstat (limited to 'drivers/staging/iio/gyro/adis16080_core.c')
-rw-r--r--drivers/staging/iio/gyro/adis16080_core.c163
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");
generated by cgit v1.2.3 (git 2.0.4) at 2024-05-23 12:42:15 +0000