#include <linux/spi/spi.h>
#include <linux/sysfs.h>
#include <linux/slab.h>
+#include <linux/module.h>
#include "../iio.h"
#include "../sysfs.h"
-#include "../adc/adc.h"
-#include "accel.h"
#define KXSD9_REG_X 0x00
#define KXSD9_REG_Y 0x02
#define KXSD9_REG_RESET 0x0a
#define KXSD9_REG_CTRL_C 0x0c
-#define KXSD9_FS_8 0x00
-#define KXSD9_FS_6 0x01
-#define KXSD9_FS_4 0x02
-#define KXSD9_FS_2 0x03
#define KXSD9_FS_MASK 0x03
#define KXSD9_REG_CTRL_B 0x0d
#define KXSD9_READ(a) (0x80 | (a))
#define KXSD9_WRITE(a) (a)
-#define KXSD9_SCALE_2G "0.011978"
-#define KXSD9_SCALE_4G "0.023927"
-#define KXSD9_SCALE_6G "0.035934"
-#define KXSD9_SCALE_8G "0.047853"
-
#define KXSD9_STATE_RX_SIZE 2
-#define KXSD9_STATE_TX_SIZE 4
+#define KXSD9_STATE_TX_SIZE 2
/**
* struct kxsd9_state - device related storage
* @buf_lock: protect the rx and tx buffers.
u8 tx[KXSD9_STATE_TX_SIZE];
};
-/* This may want to move to mili g to allow for non integer ranges */
-static ssize_t kxsd9_read_scale(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- int ret;
- ssize_t len = 0;
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
- struct kxsd9_state *st = iio_priv(indio_dev);
- struct spi_transfer xfer = {
- .bits_per_word = 8,
- .len = 2,
- .cs_change = 1,
- .tx_buf = st->tx,
- .rx_buf = st->rx,
- };
- struct spi_message msg;
-
- mutex_lock(&st->buf_lock);
- st->tx[0] = KXSD9_READ(KXSD9_REG_CTRL_C);
- st->tx[1] = 0;
- spi_message_init(&msg);
- spi_message_add_tail(&xfer, &msg);
- ret = spi_sync(st->us, &msg);
- if (ret)
- goto error_ret;
+#define KXSD9_SCALE_2G "0.011978"
+#define KXSD9_SCALE_4G "0.023927"
+#define KXSD9_SCALE_6G "0.035934"
+#define KXSD9_SCALE_8G "0.047853"
- switch (st->rx[1] & KXSD9_FS_MASK) {
- case KXSD9_FS_8:
- len += sprintf(buf, "%s\n", KXSD9_SCALE_8G);
- break;
- case KXSD9_FS_6:
- len += sprintf(buf, "%s\n", KXSD9_SCALE_6G);
- break;
- case KXSD9_FS_4:
- len += sprintf(buf, "%s\n", KXSD9_SCALE_4G);
- break;
- case KXSD9_FS_2:
- len += sprintf(buf, "%s\n", KXSD9_SCALE_2G);
- break;
- }
+/* reverse order */
+static const int kxsd9_micro_scales[4] = { 47853, 35934, 23927, 11978 };
-error_ret:
- mutex_unlock(&st->buf_lock);
-
- return ret ? ret : len;
-}
-static ssize_t kxsd9_write_scale(struct device *dev,
- struct device_attribute *attr,
- const char *buf,
- size_t len)
+static int kxsd9_write_scale(struct iio_dev *indio_dev, int micro)
{
-
- struct spi_message msg;
- int ret;
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ int ret, i;
struct kxsd9_state *st = iio_priv(indio_dev);
- u8 val;
- struct spi_transfer xfers[] = {
- {
- .bits_per_word = 8,
- .len = 2,
- .cs_change = 1,
- .tx_buf = st->tx,
- .rx_buf = st->rx,
- }, {
- .bits_per_word = 8,
- .len = 2,
- .cs_change = 1,
- .tx_buf = st->tx,
- },
- };
-
- if (!strncmp(buf, KXSD9_SCALE_8G,
- strlen(buf) < strlen(KXSD9_SCALE_8G)
- ? strlen(buf) : strlen(KXSD9_SCALE_8G)))
- val = KXSD9_FS_8;
- else if (!strncmp(buf, KXSD9_SCALE_6G,
- strlen(buf) < strlen(KXSD9_SCALE_6G)
- ? strlen(buf) : strlen(KXSD9_SCALE_6G)))
- val = KXSD9_FS_6;
- else if (!strncmp(buf, KXSD9_SCALE_4G,
- strlen(buf) < strlen(KXSD9_SCALE_4G)
- ? strlen(buf) : strlen(KXSD9_SCALE_4G)))
- val = KXSD9_FS_4;
- else if (!strncmp(buf, KXSD9_SCALE_2G,
- strlen(buf) < strlen(KXSD9_SCALE_2G)
- ? strlen(buf) : strlen(KXSD9_SCALE_2G)))
- val = KXSD9_FS_2;
- else
+ bool foundit = false;
+
+ for (i = 0; i < 4; i++)
+ if (micro == kxsd9_micro_scales[i]) {
+ foundit = true;
+ break;
+ }
+ if (!foundit)
return -EINVAL;
mutex_lock(&st->buf_lock);
- st->tx[0] = KXSD9_READ(KXSD9_REG_CTRL_C);
- st->tx[1] = 0;
- spi_message_init(&msg);
- spi_message_add_tail(&xfers[0], &msg);
- ret = spi_sync(st->us, &msg);
- if (ret)
+ ret = spi_w8r8(st->us, KXSD9_READ(KXSD9_REG_CTRL_C));
+ if (ret < 0)
goto error_ret;
st->tx[0] = KXSD9_WRITE(KXSD9_REG_CTRL_C);
- st->tx[1] = (st->rx[1] & ~KXSD9_FS_MASK) | val;
+ st->tx[1] = (ret & ~KXSD9_FS_MASK) | i;
- spi_message_init(&msg);
- spi_message_add_tail(&xfers[1], &msg);
- ret = spi_sync(st->us, &msg);
+ ret = spi_write(st->us, st->tx, 2);
error_ret:
mutex_unlock(&st->buf_lock);
- return ret ? ret : len;
+ return ret;
}
-static ssize_t kxsd9_read_accel(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static int kxsd9_read(struct iio_dev *indio_dev, u8 address)
{
struct spi_message msg;
int ret;
- ssize_t len = 0;
- u16 val;
- struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct kxsd9_state *st = iio_priv(indio_dev);
struct spi_transfer xfers[] = {
{
.bits_per_word = 8,
.len = 1,
- .cs_change = 0,
.delay_usecs = 200,
.tx_buf = st->tx,
}, {
.bits_per_word = 8,
.len = 2,
- .cs_change = 1,
.rx_buf = st->rx,
},
};
mutex_lock(&st->buf_lock);
- st->tx[0] = KXSD9_READ(this_attr->address);
+ st->tx[0] = KXSD9_READ(address);
spi_message_init(&msg);
spi_message_add_tail(&xfers[0], &msg);
spi_message_add_tail(&xfers[1], &msg);
ret = spi_sync(st->us, &msg);
if (ret)
- goto error_ret;
- val = (((u16)(st->rx[0])) << 8) | (st->rx[1] & 0xF0);
- len = sprintf(buf, "%d\n", val);
-error_ret:
- mutex_unlock(&st->buf_lock);
-
- return ret ? ret : len;
+ return ret;
+ return (((u16)(st->rx[0])) << 8) | (st->rx[1] & 0xF0);
}
-static IIO_DEV_ATTR_ACCEL_X(kxsd9_read_accel, KXSD9_REG_X);
-static IIO_DEV_ATTR_ACCEL_Y(kxsd9_read_accel, KXSD9_REG_Y);
-static IIO_DEV_ATTR_ACCEL_Z(kxsd9_read_accel, KXSD9_REG_Z);
-static IIO_DEV_ATTR_IN_RAW(0, kxsd9_read_accel, KXSD9_REG_AUX);
-
-static IIO_DEVICE_ATTR(accel_scale,
- S_IRUGO | S_IWUSR,
- kxsd9_read_scale,
- kxsd9_write_scale,
- 0);
-
static IIO_CONST_ATTR(accel_scale_available,
KXSD9_SCALE_2G " "
KXSD9_SCALE_4G " "
KXSD9_SCALE_8G);
static struct attribute *kxsd9_attributes[] = {
- &iio_dev_attr_accel_x_raw.dev_attr.attr,
- &iio_dev_attr_accel_y_raw.dev_attr.attr,
- &iio_dev_attr_accel_z_raw.dev_attr.attr,
- &iio_dev_attr_in0_raw.dev_attr.attr,
- &iio_dev_attr_accel_scale.dev_attr.attr,
&iio_const_attr_accel_scale_available.dev_attr.attr,
NULL,
};
+static int kxsd9_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val,
+ int val2,
+ long mask)
+{
+ int ret = -EINVAL;
+
+ if (mask == (1 << IIO_CHAN_INFO_SCALE_SHARED)) {
+ /* Check no integer component */
+ if (val)
+ return -EINVAL;
+ ret = kxsd9_write_scale(indio_dev, val2);
+ }
+
+ return ret;
+}
+
+static int kxsd9_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ int ret = -EINVAL;
+ struct kxsd9_state *st = iio_priv(indio_dev);
+
+ switch (mask) {
+ case 0:
+ ret = kxsd9_read(indio_dev, chan->address);
+ if (ret < 0)
+ goto error_ret;
+ *val = ret;
+ ret = IIO_VAL_INT;
+ break;
+ case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+ ret = spi_w8r8(st->us, KXSD9_READ(KXSD9_REG_CTRL_C));
+ if (ret < 0)
+ goto error_ret;
+ *val2 = kxsd9_micro_scales[ret & KXSD9_FS_MASK];
+ ret = IIO_VAL_INT_PLUS_MICRO;
+ break;
+ };
+
+error_ret:
+ return ret;
+};
+#define KXSD9_ACCEL_CHAN(axis) \
+ { \
+ .type = IIO_ACCEL, \
+ .modified = 1, \
+ .channel2 = IIO_MOD_##axis, \
+ .info_mask = 1 << IIO_CHAN_INFO_SCALE_SHARED, \
+ .address = KXSD9_REG_##axis, \
+ }
+
+static struct iio_chan_spec kxsd9_channels[] = {
+ KXSD9_ACCEL_CHAN(X), KXSD9_ACCEL_CHAN(Y), KXSD9_ACCEL_CHAN(Z),
+ {
+ .type = IIO_VOLTAGE,
+ .indexed = 1,
+ .address = KXSD9_REG_AUX,
+ }
+};
+
static const struct attribute_group kxsd9_attribute_group = {
.attrs = kxsd9_attributes,
};
static int __devinit kxsd9_power_up(struct kxsd9_state *st)
{
- struct spi_transfer xfers[2] = {
- {
- .bits_per_word = 8,
- .len = 2,
- .cs_change = 1,
- .tx_buf = st->tx,
- }, {
- .bits_per_word = 8,
- .len = 2,
- .cs_change = 1,
- .tx_buf = st->tx + 2,
- },
- };
- struct spi_message msg;
+ int ret;
+
st->tx[0] = 0x0d;
st->tx[1] = 0x40;
- st->tx[2] = 0x0c;
- st->tx[3] = 0x9b;
-
- spi_message_init(&msg);
- spi_message_add_tail(&xfers[0], &msg);
- spi_message_add_tail(&xfers[1], &msg);
+ ret = spi_write(st->us, st->tx, 2);
+ if (ret)
+ return ret;
- return spi_sync(st->us, &msg);
+ st->tx[0] = 0x0c;
+ st->tx[1] = 0x9b;
+ return spi_write(st->us, st->tx, 2);
};
static const struct iio_info kxsd9_info = {
+ .read_raw = &kxsd9_read_raw,
+ .write_raw = &kxsd9_write_raw,
.attrs = &kxsd9_attribute_group,
.driver_module = THIS_MODULE,
};
st->us = spi;
mutex_init(&st->buf_lock);
-
+ indio_dev->channels = kxsd9_channels;
+ indio_dev->num_channels = ARRAY_SIZE(kxsd9_channels);
+ indio_dev->name = spi_get_device_id(spi)->name;
indio_dev->dev.parent = &spi->dev;
indio_dev->info = &kxsd9_info;
indio_dev->modes = INDIO_DIRECT_MODE;
static int __devexit kxsd9_remove(struct spi_device *spi)
{
iio_device_unregister(spi_get_drvdata(spi));
+ iio_free_device(spi_get_drvdata(spi));
return 0;
}
+static const struct spi_device_id kxsd9_id[] = {
+ {"kxsd9", 0}
+};
+
static struct spi_driver kxsd9_driver = {
.driver = {
.name = "kxsd9",
},
.probe = kxsd9_probe,
.remove = __devexit_p(kxsd9_remove),
+ .id_table = kxsd9_id,
};
static __init int kxsd9_spi_init(void)
git.openpandora.org / pandora-kernel.git / blobdiff