ad799x-$(CONFIG_AD799X_RING_BUFFER) += ad799x_ring.o
obj-$(CONFIG_AD799X) += ad799x.o
-ad7887-y := ad7887_core.o
-ad7887-$(CONFIG_IIO_BUFFER) += ad7887_ring.o
obj-$(CONFIG_AD7887) += ad7887.o
ad7298-y := ad7298_core.o
#include <linux/regulator/consumer.h>
#include <linux/err.h>
#include <linux/module.h>
+#include <linux/interrupt.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/buffer.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
#include "ad7887.h"
+#define AD7887_REF_DIS (1 << 5) /* on-chip reference disable */
+#define AD7887_DUAL (1 << 4) /* dual-channel mode */
+#define AD7887_CH_AIN1 (1 << 3) /* convert on channel 1, DUAL=1 */
+#define AD7887_CH_AIN0 (0 << 3) /* convert on channel 0, DUAL=0,1 */
+#define AD7887_PM_MODE1 (0) /* CS based shutdown */
+#define AD7887_PM_MODE2 (1) /* full on */
+#define AD7887_PM_MODE3 (2) /* auto shutdown after conversion */
+#define AD7887_PM_MODE4 (3) /* standby mode */
+
+enum ad7887_channels {
+ AD7887_CH0,
+ AD7887_CH0_CH1,
+ AD7887_CH1,
+};
+
+#define RES_MASK(bits) ((1 << (bits)) - 1)
+
+/**
+ * struct ad7887_chip_info - chip specifc information
+ * @int_vref_mv: the internal reference voltage
+ * @channel: channel specification
+ */
+struct ad7887_chip_info {
+ u16 int_vref_mv;
+ struct iio_chan_spec channel[3];
+};
+
+struct ad7887_state {
+ struct spi_device *spi;
+ const struct ad7887_chip_info *chip_info;
+ struct regulator *reg;
+ struct spi_transfer xfer[4];
+ struct spi_message msg[3];
+ struct spi_message *ring_msg;
+ unsigned char tx_cmd_buf[8];
+
+ /*
+ * DMA (thus cache coherency maintenance) requires the
+ * transfer buffers to live in their own cache lines.
+ * Buffer needs to be large enough to hold two 16 bit samples and a
+ * 64 bit aligned 64 bit timestamp.
+ */
+ unsigned char data[ALIGN(4, sizeof(s64)) + sizeof(s64)]
+ ____cacheline_aligned;
+};
+
+enum ad7887_supported_device_ids {
+ ID_AD7887
+};
+
+static int ad7887_ring_preenable(struct iio_dev *indio_dev)
+{
+ struct ad7887_state *st = iio_priv(indio_dev);
+ int ret;
+
+ ret = iio_sw_buffer_preenable(indio_dev);
+ if (ret < 0)
+ return ret;
+
+ /* We know this is a single long so can 'cheat' */
+ switch (*indio_dev->active_scan_mask) {
+ case (1 << 0):
+ st->ring_msg = &st->msg[AD7887_CH0];
+ break;
+ case (1 << 1):
+ st->ring_msg = &st->msg[AD7887_CH1];
+ /* Dummy read: push CH1 setting down to hardware */
+ spi_sync(st->spi, st->ring_msg);
+ break;
+ case ((1 << 1) | (1 << 0)):
+ st->ring_msg = &st->msg[AD7887_CH0_CH1];
+ break;
+ }
+
+ return 0;
+}
+
+static int ad7887_ring_postdisable(struct iio_dev *indio_dev)
+{
+ struct ad7887_state *st = iio_priv(indio_dev);
+
+ /* dummy read: restore default CH0 settin */
+ return spi_sync(st->spi, &st->msg[AD7887_CH0]);
+}
+
+/**
+ * ad7887_trigger_handler() bh of trigger launched polling to ring buffer
+ *
+ * Currently there is no option in this driver to disable the saving of
+ * timestamps within the ring.
+ **/
+static irqreturn_t ad7887_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct ad7887_state *st = iio_priv(indio_dev);
+ s64 time_ns;
+ int b_sent;
+
+ b_sent = spi_sync(st->spi, st->ring_msg);
+ if (b_sent)
+ goto done;
+
+ time_ns = iio_get_time_ns();
+
+ if (indio_dev->scan_timestamp)
+ memcpy(st->data + indio_dev->scan_bytes - sizeof(s64),
+ &time_ns, sizeof(time_ns));
+
+ iio_push_to_buffer(indio_dev->buffer, st->data);
+done:
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
+static const struct iio_buffer_setup_ops ad7887_ring_setup_ops = {
+ .preenable = &ad7887_ring_preenable,
+ .postenable = &iio_triggered_buffer_postenable,
+ .predisable = &iio_triggered_buffer_predisable,
+ .postdisable = &ad7887_ring_postdisable,
+};
+
static int ad7887_scan_direct(struct ad7887_state *st, unsigned ch)
{
int ret = spi_sync(st->spi, &st->msg[ch]);
indio_dev->num_channels = 2;
}
- ret = ad7887_register_ring_funcs_and_init(indio_dev);
+ ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
+ &ad7887_trigger_handler, &ad7887_ring_setup_ops);
if (ret)
goto error_disable_reg;
return 0;
error_unregister_ring:
- ad7887_ring_cleanup(indio_dev);
+ iio_triggered_buffer_cleanup(indio_dev);
error_disable_reg:
if (st->reg)
regulator_disable(st->reg);
struct ad7887_state *st = iio_priv(indio_dev);
iio_device_unregister(indio_dev);
- ad7887_ring_cleanup(indio_dev);
+ iio_triggered_buffer_cleanup(indio_dev);
if (st->reg) {
regulator_disable(st->reg);
regulator_put(st->reg);
#ifndef IIO_ADC_AD7887_H_
#define IIO_ADC_AD7887_H_
-#define AD7887_REF_DIS (1 << 5) /* on-chip reference disable */
-#define AD7887_DUAL (1 << 4) /* dual-channel mode */
-#define AD7887_CH_AIN1 (1 << 3) /* convert on channel 1, DUAL=1 */
-#define AD7887_CH_AIN0 (0 << 3) /* convert on channel 0, DUAL=0,1 */
-#define AD7887_PM_MODE1 (0) /* CS based shutdown */
-#define AD7887_PM_MODE2 (1) /* full on */
-#define AD7887_PM_MODE3 (2) /* auto shutdown after conversion */
-#define AD7887_PM_MODE4 (3) /* standby mode */
-
-enum ad7887_channels {
- AD7887_CH0,
- AD7887_CH0_CH1,
- AD7887_CH1,
-};
-
-#define RES_MASK(bits) ((1 << (bits)) - 1) /* TODO: move this into a common header */
-
/*
* TODO: struct ad7887_platform_data needs to go into include/linux/iio
*/
bool use_onchip_ref;
};
-/**
- * struct ad7887_chip_info - chip specifc information
- * @int_vref_mv: the internal reference voltage
- * @channel: channel specification
- */
-
-struct ad7887_chip_info {
- u16 int_vref_mv;
- struct iio_chan_spec channel[3];
-};
-
-struct ad7887_state {
- struct spi_device *spi;
- const struct ad7887_chip_info *chip_info;
- struct regulator *reg;
- struct spi_transfer xfer[4];
- struct spi_message msg[3];
- struct spi_message *ring_msg;
- unsigned char tx_cmd_buf[8];
-
- /*
- * DMA (thus cache coherency maintenance) requires the
- * transfer buffers to live in their own cache lines.
- * Buffer needs to be large enough to hold two 16 bit samples and a
- * 64 bit aligned 64 bit timestamp.
- */
- unsigned char data[ALIGN(4, sizeof(s64)) + sizeof(s64)]
- ____cacheline_aligned;
-};
-
-enum ad7887_supported_device_ids {
- ID_AD7887
-};
-
-#ifdef CONFIG_IIO_BUFFER
-int ad7887_register_ring_funcs_and_init(struct iio_dev *indio_dev);
-void ad7887_ring_cleanup(struct iio_dev *indio_dev);
-#else /* CONFIG_IIO_BUFFER */
-
-static inline int
-ad7887_register_ring_funcs_and_init(struct iio_dev *indio_dev)
-{
- return 0;
-}
-
-static inline void ad7887_ring_cleanup(struct iio_dev *indio_dev)
-{
-}
-#endif /* CONFIG_IIO_BUFFER */
#endif /* IIO_ADC_AD7887_H_ */
+++ /dev/null
-/*
- * Copyright 2010-2012 Analog Devices Inc.
- * Copyright (C) 2008 Jonathan Cameron
- *
- * Licensed under the GPL-2.
- *
- * ad7887_ring.c
- */
-
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/spi/spi.h>
-
-#include <linux/iio/iio.h>
-#include <linux/iio/buffer.h>
-#include <linux/iio/trigger_consumer.h>
-#include <linux/iio/triggered_buffer.h>
-
-#include "ad7887.h"
-
-/**
- * ad7887_ring_preenable() setup the parameters of the ring before enabling
- *
- * The complex nature of the setting of the nuber of bytes per datum is due
- * to this driver currently ensuring that the timestamp is stored at an 8
- * byte boundary.
- **/
-static int ad7887_ring_preenable(struct iio_dev *indio_dev)
-{
- struct ad7887_state *st = iio_priv(indio_dev);
- int ret;
-
- ret = iio_sw_buffer_preenable(indio_dev);
- if (ret < 0)
- return ret;
-
- /* We know this is a single long so can 'cheat' */
- switch (*indio_dev->active_scan_mask) {
- case (1 << 0):
- st->ring_msg = &st->msg[AD7887_CH0];
- break;
- case (1 << 1):
- st->ring_msg = &st->msg[AD7887_CH1];
- /* Dummy read: push CH1 setting down to hardware */
- spi_sync(st->spi, st->ring_msg);
- break;
- case ((1 << 1) | (1 << 0)):
- st->ring_msg = &st->msg[AD7887_CH0_CH1];
- break;
- }
-
- return 0;
-}
-
-static int ad7887_ring_postdisable(struct iio_dev *indio_dev)
-{
- struct ad7887_state *st = iio_priv(indio_dev);
-
- /* dummy read: restore default CH0 settin */
- return spi_sync(st->spi, &st->msg[AD7887_CH0]);
-}
-
-/**
- * ad7887_trigger_handler() bh of trigger launched polling to ring buffer
- *
- * Currently there is no option in this driver to disable the saving of
- * timestamps within the ring.
- **/
-static irqreturn_t ad7887_trigger_handler(int irq, void *p)
-{
- struct iio_poll_func *pf = p;
- struct iio_dev *indio_dev = pf->indio_dev;
- struct ad7887_state *st = iio_priv(indio_dev);
- s64 time_ns;
- int b_sent;
-
- b_sent = spi_sync(st->spi, st->ring_msg);
- if (b_sent)
- goto done;
-
- time_ns = iio_get_time_ns();
-
- if (indio_dev->scan_timestamp)
- memcpy(st->data + indio_dev->scan_bytes - sizeof(s64),
- &time_ns, sizeof(time_ns));
-
- iio_push_to_buffer(indio_dev->buffer, st->data);
-done:
- iio_trigger_notify_done(indio_dev->trig);
-
- return IRQ_HANDLED;
-}
-
-static const struct iio_buffer_setup_ops ad7887_ring_setup_ops = {
- .preenable = &ad7887_ring_preenable,
- .postenable = &iio_triggered_buffer_postenable,
- .predisable = &iio_triggered_buffer_predisable,
- .postdisable = &ad7887_ring_postdisable,
-};
-
-int ad7887_register_ring_funcs_and_init(struct iio_dev *indio_dev)
-{
- return iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
- &ad7887_trigger_handler, &ad7887_ring_setup_ops);
-}
-
-void ad7887_ring_cleanup(struct iio_dev *indio_dev)
-{
- iio_triggered_buffer_cleanup(indio_dev);
-}
projects / users / griffoul / linux.git / commitdiff