static const struct sca3000_chip_info sca3000_spi_chip_info_tbl[] = {
{
.name = "sca3000-d01",
- .scale = " 0.0073575",
+ .scale = 7357,
.temp_output = true,
.measurement_mode_freq = 250,
.option_mode_1 = SCA3000_OP_MODE_BYPASS,
.option_mode_1_freq = 250,
+ .mot_det_mult_xz = {50, 100, 200, 350, 650, 1300},
+ .mot_det_mult_y = {50, 100, 150, 250, 450, 850, 1750},
}, {
.name = "sca3000-e02",
- .scale = "0.00981",
+ .scale = 9810,
.measurement_mode_freq = 125,
.option_mode_1 = SCA3000_OP_MODE_NARROW,
.option_mode_1_freq = 63,
+ .mot_det_mult_xz = {100, 150, 300, 550, 1050, 2050},
+ .mot_det_mult_y = {50, 100, 200, 350, 700, 1350, 2700},
}, {
.name = "sca3000-e04",
- .scale = "0.01962",
+ .scale = 19620,
.measurement_mode_freq = 100,
.option_mode_1 = SCA3000_OP_MODE_NARROW,
.option_mode_1_freq = 50,
.option_mode_2 = SCA3000_OP_MODE_WIDE,
.option_mode_2_freq = 400,
+ .mot_det_mult_xz = {200, 300, 600, 1100, 2100, 4100},
+ .mot_det_mult_y = {100, 200, 400, 7000, 1400, 2700, 54000},
}, {
.name = "sca3000-e05",
- .scale = "0.0613125",
+ .scale = 61313,
.measurement_mode_freq = 200,
.option_mode_1 = SCA3000_OP_MODE_NARROW,
.option_mode_1_freq = 50,
.option_mode_2 = SCA3000_OP_MODE_WIDE,
.option_mode_2_freq = 400,
+ .mot_det_mult_xz = {600, 900, 1700, 3200, 6100, 11900},
+ .mot_det_mult_y = {300, 600, 1200, 2000, 4100, 7800, 15600},
},
};
-
int sca3000_write_reg(struct sca3000_state *st, u8 address, u8 val)
{
- struct spi_transfer xfer = {
- .bits_per_word = 8,
- .len = 2,
- .cs_change = 1,
- .tx_buf = st->tx,
- };
- struct spi_message msg;
-
st->tx[0] = SCA3000_WRITE_REG(address);
st->tx[1] = val;
- spi_message_init(&msg);
- spi_message_add_tail(&xfer, &msg);
-
- return spi_sync(st->us, &msg);
+ return spi_write(st->us, st->tx, 2);
}
-int sca3000_read_data(struct sca3000_state *st,
- uint8_t reg_address_high,
- u8 **rx_p,
- int len)
+int sca3000_read_data_short(struct sca3000_state *st,
+ uint8_t reg_address_high,
+ int len)
{
- int ret;
struct spi_message msg;
- struct spi_transfer xfer = {
- .bits_per_word = 8,
- .len = len + 1,
- .cs_change = 1,
- .tx_buf = st->tx,
+ struct spi_transfer xfer[2] = {
+ {
+ .len = 1,
+ .tx_buf = st->tx,
+ }, {
+ .len = len,
+ .rx_buf = st->rx,
+ }
};
-
- *rx_p = kmalloc(len + 1, GFP_KERNEL);
- if (*rx_p == NULL) {
- ret = -ENOMEM;
- goto error_ret;
- }
- xfer.rx_buf = *rx_p;
st->tx[0] = SCA3000_READ_REG(reg_address_high);
spi_message_init(&msg);
- spi_message_add_tail(&xfer, &msg);
-
- ret = spi_sync(st->us, &msg);
-
- if (ret) {
- dev_err(get_device(&st->us->dev), "problem reading register");
- goto error_free_rx;
- }
-
- return 0;
-error_free_rx:
- kfree(*rx_p);
-error_ret:
- return ret;
+ spi_message_add_tail(&xfer[0], &msg);
+ spi_message_add_tail(&xfer[1], &msg);
+ return spi_sync(st->us, &msg);
}
+
/**
* sca3000_reg_lock_on() test if the ctrl register lock is on
*
**/
static int sca3000_reg_lock_on(struct sca3000_state *st)
{
- u8 *rx;
int ret;
- ret = sca3000_read_data(st, SCA3000_REG_ADDR_STATUS, &rx, 1);
-
+ ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_STATUS, 1);
if (ret < 0)
return ret;
- ret = !(rx[1] & SCA3000_LOCKED);
- kfree(rx);
- return ret;
+ return !(st->rx[0] & SCA3000_LOCKED);
}
/**
struct spi_message msg;
struct spi_transfer xfer[3] = {
{
- .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,
}, {
- .bits_per_word = 8,
.len = 2,
- .cs_change = 1,
.tx_buf = st->tx + 4,
},
};
* Lock must be held.
**/
static int sca3000_read_ctrl_reg(struct sca3000_state *st,
- u8 ctrl_reg,
- u8 **rx_p)
+ u8 ctrl_reg)
{
int ret;
ret = sca3000_write_reg(st, SCA3000_REG_ADDR_CTRL_SEL, ctrl_reg);
if (ret)
goto error_ret;
- ret = sca3000_read_data(st, SCA3000_REG_ADDR_CTRL_DATA, rx_p, 1);
-
+ ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_CTRL_DATA, 1);
+ if (ret)
+ goto error_ret;
+ else
+ return st->rx[0];
error_ret:
return ret;
}
**/
static int sca3000_check_status(struct device *dev)
{
- u8 *rx;
int ret;
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct sca3000_state *st = indio_dev->dev_data;
mutex_lock(&st->lock);
- ret = sca3000_read_data(st, SCA3000_REG_ADDR_STATUS, &rx, 1);
+ ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_STATUS, 1);
if (ret < 0)
goto error_ret;
- if (rx[1] & SCA3000_EEPROM_CS_ERROR)
+ if (st->rx[0] & SCA3000_EEPROM_CS_ERROR)
dev_err(dev, "eeprom error\n");
- if (rx[1] & SCA3000_SPI_FRAME_ERROR)
+ if (st->rx[0] & SCA3000_SPI_FRAME_ERROR)
dev_err(dev, "Previous SPI Frame was corrupt\n");
- kfree(rx);
error_ret:
mutex_unlock(&st->lock);
}
#endif /* SCA3000_DEBUG */
-/**
- * sca3000_read_13bit_signed() sysfs interface to read 13 bit signed registers
- *
- * These are described as signed 12 bit on the data sheet, which appears
- * to be a conventional 2's complement 13 bit.
- **/
-static ssize_t sca3000_read_13bit_signed(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- int len = 0, ret;
- int val;
- struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
- u8 *rx;
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
- struct sca3000_state *st = indio_dev->dev_data;
-
- mutex_lock(&st->lock);
- ret = sca3000_read_data(st, this_attr->address, &rx, 2);
- if (ret < 0)
- goto error_ret;
- val = sca3000_13bit_convert(rx[1], rx[2]);
- len += sprintf(buf + len, "%d\n", val);
- kfree(rx);
-error_ret:
- mutex_unlock(&st->lock);
-
- return ret ? ret : len;
-}
-
-static ssize_t sca3000_show_scale(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct iio_dev *dev_info = dev_get_drvdata(dev);
- struct sca3000_state *st = dev_info->dev_data;
- return sprintf(buf, "%s\n", st->info->scale);
-}
-
static ssize_t sca3000_show_name(struct device *dev,
struct device_attribute *attr,
char *buf)
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct sca3000_state *st = dev_info->dev_data;
- u8 *rx;
-
mutex_lock(&st->lock);
- ret = sca3000_read_data(st, SCA3000_REG_ADDR_REVID, &rx, 1);
+ ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_REVID, 1);
if (ret < 0)
goto error_ret;
len += sprintf(buf + len,
"major=%d, minor=%d\n",
- rx[1] & SCA3000_REVID_MAJOR_MASK,
- rx[1] & SCA3000_REVID_MINOR_MASK);
- kfree(rx);
-
+ st->rx[0] & SCA3000_REVID_MAJOR_MASK,
+ st->rx[0] & SCA3000_REVID_MINOR_MASK);
error_ret:
mutex_unlock(&st->lock);
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct sca3000_state *st = dev_info->dev_data;
int len = 0, ret;
- u8 *rx;
mutex_lock(&st->lock);
- ret = sca3000_read_data(st, SCA3000_REG_ADDR_MODE, &rx, 1);
+ ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_MODE, 1);
if (ret)
goto error_ret;
/* mask bottom 2 bits - only ones that are relevant */
- rx[1] &= 0x03;
- switch (rx[1]) {
+ st->rx[0] &= 0x03;
+ switch (st->rx[0]) {
case SCA3000_MEAS_MODE_NORMAL:
len += sprintf(buf + len, "0 - normal mode\n");
break;
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct sca3000_state *st = dev_info->dev_data;
int ret;
- u8 *rx;
int mask = 0x03;
long val;
ret = strict_strtol(buf, 10, &val);
if (ret)
goto error_ret;
- ret = sca3000_read_data(st, SCA3000_REG_ADDR_MODE, &rx, 1);
+ ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_MODE, 1);
if (ret)
goto error_ret;
- rx[1] &= ~mask;
- rx[1] |= (val & mask);
- ret = sca3000_write_reg(st, SCA3000_REG_ADDR_MODE, rx[1]);
+ st->rx[0] &= ~mask;
+ st->rx[0] |= (val & mask);
+ ret = sca3000_write_reg(st, SCA3000_REG_ADDR_MODE, st->rx[0]);
if (ret)
- goto error_free_rx;
+ goto error_ret;
mutex_unlock(&st->lock);
return len;
-error_free_rx:
- kfree(rx);
error_ret:
mutex_unlock(&st->lock);
static IIO_DEV_ATTR_NAME(sca3000_show_name);
static IIO_DEV_ATTR_REV(sca3000_show_rev);
-static IIO_DEVICE_ATTR(accel_scale, S_IRUGO, sca3000_show_scale,
- NULL, 0);
-static IIO_DEV_ATTR_ACCEL_X(sca3000_read_13bit_signed,
- SCA3000_REG_ADDR_X_MSB);
-static IIO_DEV_ATTR_ACCEL_Y(sca3000_read_13bit_signed,
- SCA3000_REG_ADDR_Y_MSB);
-static IIO_DEV_ATTR_ACCEL_Z(sca3000_read_13bit_signed,
- SCA3000_REG_ADDR_Z_MSB);
+#define SCA3000_INFO_MASK \
+ (1 << IIO_CHAN_INFO_SCALE_SHARED)
+#define SCA3000_EVENT_MASK \
+ (IIO_EV_BIT(IIO_EV_TYPE_MAG, IIO_EV_DIR_RISING))
+
+static struct iio_chan_spec sca3000_channels[] = {
+ IIO_CHAN(IIO_ACCEL, 1, 0, 0, NULL, 0, IIO_MOD_X, SCA3000_INFO_MASK,
+ 0, 0, IIO_ST('s', 11, 16, 5),
+ SCA3000_EVENT_MASK, NULL),
+ IIO_CHAN(IIO_ACCEL, 1, 0, 0, NULL, 0, IIO_MOD_Y, SCA3000_INFO_MASK,
+ 1, 1, IIO_ST('s', 11, 16, 5),
+ SCA3000_EVENT_MASK, NULL),
+ IIO_CHAN(IIO_ACCEL, 1, 0, 0, NULL, 0, IIO_MOD_Z, SCA3000_INFO_MASK,
+ 2, 2, IIO_ST('s', 11, 16, 5),
+ SCA3000_EVENT_MASK, NULL),
+};
+static u8 sca3000_addresses[3][3] = {
+ [0] = {SCA3000_REG_ADDR_X_MSB, SCA3000_REG_CTRL_SEL_MD_X_TH,
+ SCA3000_MD_CTRL_OR_X},
+ [1] = {SCA3000_REG_ADDR_Y_MSB, SCA3000_REG_CTRL_SEL_MD_Y_TH,
+ SCA3000_MD_CTRL_OR_Y},
+ [2] = {SCA3000_REG_ADDR_Z_MSB, SCA3000_REG_CTRL_SEL_MD_Z_TH,
+ SCA3000_MD_CTRL_OR_Z},
+};
+
+static int sca3000_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val,
+ int *val2,
+ long mask)
+{
+ struct sca3000_state *st = indio_dev->dev_data;
+ int ret;
+ u8 address;
+
+ switch (mask) {
+ case 0:
+ mutex_lock(&st->lock);
+ if (st->mo_det_use_count) {
+ mutex_unlock(&st->lock);
+ return -EBUSY;
+ }
+ address = sca3000_addresses[chan->address][0];
+ ret = sca3000_read_data_short(st, address, 2);
+ if (ret < 0) {
+ mutex_unlock(&st->lock);
+ return ret;
+ }
+ *val = (be16_to_cpup((__be16 *)st->rx) >> 3) & 0x1FFF;
+ *val = ((*val) << (sizeof(*val)*8 - 13)) >>
+ (sizeof(*val)*8 - 13);
+ mutex_unlock(&st->lock);
+ return IIO_VAL_INT;
+ case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+ *val = 0;
+ if (chan->type == IIO_ACCEL)
+ *val2 = st->info->scale;
+ else /* temperature */
+ *val2 = 555556;
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+}
/**
* sca3000_read_av_freq() sysfs function to get available frequencies
{
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct sca3000_state *st = indio_dev->dev_data;
- int len = 0, ret;
- u8 *rx;
+ int len = 0, ret, val;
+
mutex_lock(&st->lock);
- ret = sca3000_read_data(st, SCA3000_REG_ADDR_MODE, &rx, 1);
+ ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_MODE, 1);
+ val = st->rx[0];
mutex_unlock(&st->lock);
if (ret)
goto error_ret;
- rx[1] &= 0x03;
- switch (rx[1]) {
+
+ switch (val & 0x03) {
case SCA3000_MEAS_MODE_NORMAL:
len += sprintf(buf + len, "%d %d %d\n",
st->info->measurement_mode_freq,
st->info->option_mode_2_freq/4);
break;
}
- kfree(rx);
return len;
error_ret:
return ret;
int *base_freq)
{
int ret;
- u8 *rx;
- ret = sca3000_read_data(st, SCA3000_REG_ADDR_MODE, &rx, 1);
+ ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_MODE, 1);
if (ret)
goto error_ret;
- switch (0x03 & rx[1]) {
+ switch (0x03 & st->rx[0]) {
case SCA3000_MEAS_MODE_NORMAL:
*base_freq = info->measurement_mode_freq;
break;
*base_freq = info->option_mode_2_freq;
break;
}
- kfree(rx);
error_ret:
return ret;
}
{
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct sca3000_state *st = indio_dev->dev_data;
- int ret, len = 0, base_freq = 0;
- u8 *rx;
+ int ret, len = 0, base_freq = 0, val;
+
mutex_lock(&st->lock);
ret = __sca3000_get_base_freq(st, st->info, &base_freq);
if (ret)
goto error_ret_mut;
- ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_OUT_CTRL, &rx);
+ ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_OUT_CTRL);
mutex_unlock(&st->lock);
if (ret)
goto error_ret;
+ val = ret;
if (base_freq > 0)
- switch (rx[1]&0x03) {
+ switch (val & 0x03) {
case 0x00:
case 0x03:
len = sprintf(buf, "%d\n", base_freq);
len = sprintf(buf, "%d\n", base_freq/4);
break;
}
- kfree(rx);
+
return len;
error_ret_mut:
mutex_unlock(&st->lock);
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct sca3000_state *st = indio_dev->dev_data;
int ret, base_freq = 0;
- u8 *rx;
+ int ctrlval;
long val;
ret = strict_strtol(buf, 10, &val);
if (ret)
goto error_free_lock;
- ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_OUT_CTRL, &rx);
- if (ret)
+ ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_OUT_CTRL);
+ if (ret < 0)
goto error_free_lock;
+ ctrlval = ret;
/* clear the bits */
- rx[1] &= ~0x03;
+ ctrlval &= ~0x03;
if (val == base_freq/2) {
- rx[1] |= SCA3000_OUT_CTRL_BUF_DIV_2;
+ ctrlval |= SCA3000_OUT_CTRL_BUF_DIV_2;
} else if (val == base_freq/4) {
- rx[1] |= SCA3000_OUT_CTRL_BUF_DIV_4;
+ ctrlval |= SCA3000_OUT_CTRL_BUF_DIV_4;
} else if (val != base_freq) {
ret = -EINVAL;
goto error_free_lock;
}
- ret = sca3000_write_ctrl_reg(st, SCA3000_REG_CTRL_SEL_OUT_CTRL, rx[1]);
+ ret = sca3000_write_ctrl_reg(st, SCA3000_REG_CTRL_SEL_OUT_CTRL,
+ ctrlval);
error_free_lock:
mutex_unlock(&st->lock);
{
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct sca3000_state *st = indio_dev->dev_data;
- int len = 0, ret;
+ int ret;
int val;
- u8 *rx;
- ret = sca3000_read_data(st, SCA3000_REG_ADDR_TEMP_MSB, &rx, 2);
+ ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_TEMP_MSB, 2);
if (ret < 0)
goto error_ret;
- val = ((rx[1]&0x3F) << 3) | ((rx[2] & 0xE0) >> 5);
- len += sprintf(buf + len, "%d\n", val);
- kfree(rx);
+ val = ((st->rx[0] & 0x3F) << 3) | ((st->rx[1] & 0xE0) >> 5);
- return len;
+ return sprintf(buf, "%d\n", val);
error_ret:
return ret;
static IIO_CONST_ATTR_TEMP_OFFSET("-214.6");
/**
- * sca3000_show_thresh() sysfs query of a threshold
+ * sca3000_read_thresh() - query of a threshold
**/
-static ssize_t sca3000_show_thresh(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static int sca3000_read_thresh(struct iio_dev *indio_dev,
+ int e,
+ int *val)
{
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ int ret, i;
struct sca3000_state *st = indio_dev->dev_data;
- struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
- int len = 0, ret;
- u8 *rx;
-
+ int num = IIO_EVENT_CODE_EXTRACT_MODIFIER(e);
mutex_lock(&st->lock);
- ret = sca3000_read_ctrl_reg(st,
- this_attr->address,
- &rx);
+ ret = sca3000_read_ctrl_reg(st, sca3000_addresses[num][1]);
mutex_unlock(&st->lock);
- if (ret)
+ if (ret < 0)
return ret;
- len += sprintf(buf + len, "%d\n", rx[1]);
- kfree(rx);
+ *val = 0;
+ if (num == 1)
+ for_each_set_bit(i, (unsigned long *)&ret,
+ ARRAY_SIZE(st->info->mot_det_mult_y))
+ *val += st->info->mot_det_mult_y[i];
+ else
+ for_each_set_bit(i, (unsigned long *)&ret,
+ ARRAY_SIZE(st->info->mot_det_mult_xz))
+ *val += st->info->mot_det_mult_xz[i];
- return len;
+ return 0;
}
/**
- * sca3000_write_thresh() sysfs control of threshold
+ * sca3000_write_thresh() control of threshold
**/
-static ssize_t sca3000_write_thresh(struct device *dev,
- struct device_attribute *attr,
- const char *buf,
- size_t len)
+static int sca3000_write_thresh(struct iio_dev *indio_dev,
+ int e,
+ int val)
{
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct sca3000_state *st = indio_dev->dev_data;
- struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
+ int num = IIO_EVENT_CODE_EXTRACT_MODIFIER(e);
int ret;
- long val;
+ int i;
+ u8 nonlinear = 0;
+
+ if (num == 1) {
+ i = ARRAY_SIZE(st->info->mot_det_mult_y);
+ while (i > 0)
+ if (val >= st->info->mot_det_mult_y[--i]) {
+ nonlinear |= (1 << i);
+ val -= st->info->mot_det_mult_y[i];
+ }
+ } else {
+ i = ARRAY_SIZE(st->info->mot_det_mult_xz);
+ while (i > 0)
+ if (val >= st->info->mot_det_mult_xz[--i]) {
+ nonlinear |= (1 << i);
+ val -= st->info->mot_det_mult_xz[i];
+ }
+ }
- ret = strict_strtol(buf, 10, &val);
- if (ret)
- return ret;
mutex_lock(&st->lock);
- ret = sca3000_write_ctrl_reg(st, this_attr->address, val);
+ ret = sca3000_write_ctrl_reg(st, sca3000_addresses[num][1], nonlinear);
mutex_unlock(&st->lock);
- return ret ? ret : len;
+ return ret;
}
-static IIO_DEVICE_ATTR(accel_x_raw_mag_rising_value,
- S_IRUGO | S_IWUSR,
- sca3000_show_thresh,
- sca3000_write_thresh,
- SCA3000_REG_CTRL_SEL_MD_X_TH);
-
-static IIO_DEVICE_ATTR(accel_y_raw_mag_rising_value,
- S_IRUGO | S_IWUSR,
- sca3000_show_thresh,
- sca3000_write_thresh,
- SCA3000_REG_CTRL_SEL_MD_Y_TH);
-
-static IIO_DEVICE_ATTR(accel_z_raw_mag_rising_value,
- S_IRUGO | S_IWUSR,
- sca3000_show_thresh,
- sca3000_write_thresh,
- SCA3000_REG_CTRL_SEL_MD_Z_TH);
-
static struct attribute *sca3000_attributes[] = {
&iio_dev_attr_name.dev_attr.attr,
&iio_dev_attr_revision.dev_attr.attr,
- &iio_dev_attr_accel_scale.dev_attr.attr,
- &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_measurement_mode_available.dev_attr.attr,
&iio_dev_attr_measurement_mode.dev_attr.attr,
&iio_dev_attr_sampling_frequency_available.dev_attr.attr,
static struct attribute *sca3000_attributes_with_temp[] = {
&iio_dev_attr_name.dev_attr.attr,
&iio_dev_attr_revision.dev_attr.attr,
- &iio_dev_attr_accel_scale.dev_attr.attr,
- &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_measurement_mode_available.dev_attr.attr,
&iio_dev_attr_measurement_mode.dev_attr.attr,
&iio_dev_attr_sampling_frequency_available.dev_attr.attr,
/* depending on event, push to the ring buffer event chrdev or the event one */
/**
- * sca3000_interrupt_handler_bh() - handling ring and non ring events
+ * sca3000_event_handler() - handling ring and non ring events
*
* This function is complicated by the fact that the devices can signify ring
* and non ring events via the same interrupt line and they can only
* be distinguished via a read of the relevant status register.
**/
-static void sca3000_interrupt_handler_bh(struct work_struct *work_s)
+static irqreturn_t sca3000_event_handler(int irq, void *private)
{
- struct sca3000_state *st
- = container_of(work_s, struct sca3000_state,
- interrupt_handler_ws);
- u8 *rx;
- int ret;
+ struct iio_dev *indio_dev = private;
+ struct sca3000_state *st;
+ int ret, val;
+ s64 last_timestamp = iio_get_time_ns();
+ st = indio_dev->dev_data;
/* Could lead if badly timed to an extra read of status reg,
* but ensures no interrupt is missed.
*/
- enable_irq(st->us->irq);
mutex_lock(&st->lock);
- ret = sca3000_read_data(st, SCA3000_REG_ADDR_INT_STATUS,
- &rx, 1);
+ ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_INT_STATUS, 1);
+ val = st->rx[0];
mutex_unlock(&st->lock);
if (ret)
goto done;
- sca3000_ring_int_process(rx[1], st->indio_dev->ring);
+ sca3000_ring_int_process(val, st->indio_dev->ring);
- if (rx[1] & SCA3000_INT_STATUS_FREE_FALL)
+ if (val & SCA3000_INT_STATUS_FREE_FALL)
iio_push_event(st->indio_dev, 0,
IIO_MOD_EVENT_CODE(IIO_EV_CLASS_ACCEL,
0,
IIO_EV_MOD_X_AND_Y_AND_Z,
IIO_EV_TYPE_MAG,
IIO_EV_DIR_FALLING),
- st->last_timestamp);
+ last_timestamp);
- if (rx[1] & SCA3000_INT_STATUS_Y_TRIGGER)
+ if (val & SCA3000_INT_STATUS_Y_TRIGGER)
iio_push_event(st->indio_dev, 0,
IIO_MOD_EVENT_CODE(IIO_EV_CLASS_ACCEL,
0,
IIO_EV_MOD_Y,
IIO_EV_TYPE_MAG,
IIO_EV_DIR_RISING),
- st->last_timestamp);
+ last_timestamp);
- if (rx[1] & SCA3000_INT_STATUS_X_TRIGGER)
+ if (val & SCA3000_INT_STATUS_X_TRIGGER)
iio_push_event(st->indio_dev, 0,
IIO_MOD_EVENT_CODE(IIO_EV_CLASS_ACCEL,
0,
IIO_EV_MOD_X,
IIO_EV_TYPE_MAG,
IIO_EV_DIR_RISING),
- st->last_timestamp);
+ last_timestamp);
- if (rx[1] & SCA3000_INT_STATUS_Z_TRIGGER)
+ if (val & SCA3000_INT_STATUS_Z_TRIGGER)
iio_push_event(st->indio_dev, 0,
IIO_MOD_EVENT_CODE(IIO_EV_CLASS_ACCEL,
0,
IIO_EV_MOD_Z,
IIO_EV_TYPE_MAG,
IIO_EV_DIR_RISING),
- st->last_timestamp);
+ last_timestamp);
done:
- kfree(rx);
- return;
+ return IRQ_HANDLED;
}
/**
- * sca3000_handler_th() handles all interrupt events from device
- *
- * These devices deploy unified interrupt status registers meaning
- * all interrupts must be handled together
+ * sca3000_read_event_config() what events are enabled
**/
-static int sca3000_handler_th(struct iio_dev *dev_info,
- int index,
- s64 timestamp,
- int no_test)
+static int sca3000_read_event_config(struct iio_dev *indio_dev,
+ int e)
{
- struct sca3000_state *st = dev_info->dev_data;
-
- st->last_timestamp = timestamp;
- schedule_work(&st->interrupt_handler_ws);
-
- return 0;
-}
-
-/**
- * sca3000_query_mo_det() is motion detection enabled for this axis
- *
- * First queries if motion detection is enabled and then if this axis is
- * on.
- **/
-static ssize_t sca3000_query_mo_det(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct iio_dev *indio_dev = dev_get_drvdata(dev->parent);
struct sca3000_state *st = indio_dev->dev_data;
- struct iio_event_attr *this_attr = to_iio_event_attr(attr);
- int ret, len = 0;
- u8 *rx;
+ int ret;
u8 protect_mask = 0x03;
+ int num = IIO_EVENT_CODE_EXTRACT_MODIFIER(e);
/* read current value of mode register */
mutex_lock(&st->lock);
- ret = sca3000_read_data(st, SCA3000_REG_ADDR_MODE, &rx, 1);
+ ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_MODE, 1);
if (ret)
goto error_ret;
- if ((rx[1]&protect_mask) != SCA3000_MEAS_MODE_MOT_DET)
- len += sprintf(buf + len, "0\n");
+ if ((st->rx[0] & protect_mask) != SCA3000_MEAS_MODE_MOT_DET)
+ ret = 0;
else {
- kfree(rx);
- ret = sca3000_read_ctrl_reg(st,
- SCA3000_REG_CTRL_SEL_MD_CTRL,
- &rx);
- if (ret)
+ ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_MD_CTRL);
+ if (ret < 0)
goto error_ret;
/* only supporting logical or's for now */
- len += sprintf(buf + len, "%d\n",
- (rx[1] & this_attr->mask) ? 1 : 0);
+ ret = !!(ret & sca3000_addresses[num][2]);
}
- kfree(rx);
error_ret:
mutex_unlock(&st->lock);
- return ret ? ret : len;
+ return ret;
}
/**
* sca3000_query_free_fall_mode() is free fall mode enabled
char *buf)
{
int ret, len;
- u8 *rx;
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct sca3000_state *st = indio_dev->dev_data;
+ int val;
mutex_lock(&st->lock);
- ret = sca3000_read_data(st, SCA3000_REG_ADDR_MODE, &rx, 1);
+ ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_MODE, 1);
+ val = st->rx[0];
mutex_unlock(&st->lock);
- if (ret)
+ if (ret < 0)
return ret;
len = sprintf(buf, "%d\n",
- !!(rx[1] & SCA3000_FREE_FALL_DETECT));
- kfree(rx);
-
+ !!(val & SCA3000_FREE_FALL_DETECT));
return len;
}
-/**
- * sca3000_query_ring_int() is the hardware ring status interrupt enabled
- **/
-static ssize_t sca3000_query_ring_int(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct iio_event_attr *this_attr = to_iio_event_attr(attr);
- int ret, len;
- u8 *rx;
- struct iio_dev *indio_dev = dev_get_drvdata(dev->parent);
- struct sca3000_state *st = indio_dev->dev_data;
- mutex_lock(&st->lock);
- ret = sca3000_read_data(st, SCA3000_REG_ADDR_INT_MASK, &rx, 1);
- mutex_unlock(&st->lock);
- if (ret)
- return ret;
- len = sprintf(buf, "%d\n", (rx[1] & this_attr->mask) ? 1 : 0);
- kfree(rx);
-
- return len;
-}
-/**
- * sca3000_set_ring_int() set state of ring status interrupt
- **/
-static ssize_t sca3000_set_ring_int(struct device *dev,
- struct device_attribute *attr,
- const char *buf,
- size_t len)
-{
- struct iio_dev *indio_dev = dev_get_drvdata(dev->parent);
- struct sca3000_state *st = indio_dev->dev_data;
- struct iio_event_attr *this_attr = to_iio_event_attr(attr);
-
- long val;
- int ret;
- u8 *rx;
-
- mutex_lock(&st->lock);
- ret = strict_strtol(buf, 10, &val);
- if (ret)
- goto error_ret;
- ret = sca3000_read_data(st, SCA3000_REG_ADDR_INT_MASK, &rx, 1);
- if (ret)
- goto error_ret;
- if (val)
- ret = sca3000_write_reg(st,
- SCA3000_REG_ADDR_INT_MASK,
- rx[1] | this_attr->mask);
- else
- ret = sca3000_write_reg(st,
- SCA3000_REG_ADDR_INT_MASK,
- rx[1] & ~this_attr->mask);
- kfree(rx);
-error_ret:
- mutex_unlock(&st->lock);
-
- return ret ? ret : len;
-}
/**
* sca3000_set_free_fall_mode() simple on off control for free fall int
struct sca3000_state *st = indio_dev->dev_data;
long val;
int ret;
- u8 *rx;
u8 protect_mask = SCA3000_FREE_FALL_DETECT;
mutex_lock(&st->lock);
goto error_ret;
/* read current value of mode register */
- ret = sca3000_read_data(st, SCA3000_REG_ADDR_MODE, &rx, 1);
+ ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_MODE, 1);
if (ret)
goto error_ret;
/*if off and should be on*/
- if (val && !(rx[1] & protect_mask))
+ if (val && !(st->rx[0] & protect_mask))
ret = sca3000_write_reg(st, SCA3000_REG_ADDR_MODE,
- (rx[1] | SCA3000_FREE_FALL_DETECT));
+ (st->rx[0] | SCA3000_FREE_FALL_DETECT));
/* if on and should be off */
- else if (!val && (rx[1]&protect_mask))
+ else if (!val && (st->rx[0] & protect_mask))
ret = sca3000_write_reg(st, SCA3000_REG_ADDR_MODE,
- (rx[1] & ~protect_mask));
-
- kfree(rx);
+ (st->rx[0] & ~protect_mask));
error_ret:
mutex_unlock(&st->lock);
* There is a complexity in knowing which mode to return to when
* this mode is disabled. Currently normal mode is assumed.
**/
-static ssize_t sca3000_set_mo_det(struct device *dev,
- struct device_attribute *attr,
- const char *buf,
- size_t len)
+static int sca3000_write_event_config(struct iio_dev *indio_dev,
+ int e,
+ struct iio_event_handler_list *list_el,
+ int state)
{
- struct iio_dev *indio_dev = dev_get_drvdata(dev->parent);
struct sca3000_state *st = indio_dev->dev_data;
- struct iio_event_attr *this_attr = to_iio_event_attr(attr);
- long val;
- int ret;
- u8 *rx;
+ int ret, ctrlval;
u8 protect_mask = 0x03;
- ret = strict_strtol(buf, 10, &val);
- if (ret)
- return ret;
+ int num = IIO_EVENT_CODE_EXTRACT_MODIFIER(e);
mutex_lock(&st->lock);
/* First read the motion detector config to find out if
* this axis is on*/
- ret = sca3000_read_ctrl_reg(st,
- SCA3000_REG_CTRL_SEL_MD_CTRL,
- &rx);
- if (ret)
+ ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_MD_CTRL);
+ if (ret < 0)
goto exit_point;
+ ctrlval = ret;
/* Off and should be on */
- if (val && !(rx[1] & this_attr->mask)) {
+ if (state && !(ctrlval & sca3000_addresses[num][2])) {
ret = sca3000_write_ctrl_reg(st,
SCA3000_REG_CTRL_SEL_MD_CTRL,
- rx[1] | this_attr->mask);
+ ctrlval |
+ sca3000_addresses[num][2]);
if (ret)
- goto exit_point_free_rx;
+ goto exit_point;
st->mo_det_use_count++;
- } else if (!val && (rx[1]&this_attr->mask)) {
+ } else if (!state && (ctrlval & sca3000_addresses[num][2])) {
ret = sca3000_write_ctrl_reg(st,
SCA3000_REG_CTRL_SEL_MD_CTRL,
- rx[1] & ~(this_attr->mask));
+ ctrlval &
+ ~(sca3000_addresses[num][2]));
if (ret)
- goto exit_point_free_rx;
+ goto exit_point;
st->mo_det_use_count--;
- } else /* relies on clean state for device on boot */
- goto exit_point_free_rx;
- kfree(rx);
+ }
+
/* read current value of mode register */
- ret = sca3000_read_data(st, SCA3000_REG_ADDR_MODE, &rx, 1);
+ ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_MODE, 1);
if (ret)
goto exit_point;
/*if off and should be on*/
if ((st->mo_det_use_count)
- && ((rx[1]&protect_mask) != SCA3000_MEAS_MODE_MOT_DET))
+ && ((st->rx[0] & protect_mask) != SCA3000_MEAS_MODE_MOT_DET))
ret = sca3000_write_reg(st, SCA3000_REG_ADDR_MODE,
- (rx[1] & ~protect_mask)
+ (st->rx[0] & ~protect_mask)
| SCA3000_MEAS_MODE_MOT_DET);
/* if on and should be off */
else if (!(st->mo_det_use_count)
- && ((rx[1]&protect_mask) == SCA3000_MEAS_MODE_MOT_DET))
+ && ((st->rx[0] & protect_mask) == SCA3000_MEAS_MODE_MOT_DET))
ret = sca3000_write_reg(st, SCA3000_REG_ADDR_MODE,
- (rx[1] & ~protect_mask));
-exit_point_free_rx:
- kfree(rx);
+ (st->rx[0] & ~protect_mask));
exit_point:
mutex_unlock(&st->lock);
- return ret ? ret : len;
+ return ret;
}
/* Shared event handler for all events as single event status register */
-IIO_EVENT_SH(all, &sca3000_handler_th);
+IIO_EVENT_SH(all, NULL);
/* Free fall detector related event attribute */
IIO_EVENT_ATTR_NAMED_SH(accel_xayaz_mag_falling_en,
sca3000_set_free_fall_mode,
0);
-IIO_CONST_ATTR_NAMED(accel_xayaz_mag_falling_period,
- accel_x&y&z_mag_falling_period,
- "0.226");
-
-/* Motion detector related event attributes */
-IIO_EVENT_ATTR_SH(accel_x_mag_rising_en,
- iio_event_all,
- sca3000_query_mo_det,
- sca3000_set_mo_det,
- SCA3000_MD_CTRL_OR_X);
-
-IIO_EVENT_ATTR_SH(accel_y_mag_rising_en,
- iio_event_all,
- sca3000_query_mo_det,
- sca3000_set_mo_det,
- SCA3000_MD_CTRL_OR_Y);
-
-IIO_EVENT_ATTR_SH(accel_z_mag_rising_en,
- iio_event_all,
- sca3000_query_mo_det,
- sca3000_set_mo_det,
- SCA3000_MD_CTRL_OR_Z);
-
-/* Hardware ring buffer related event attributes */
-IIO_EVENT_ATTR_RING_50_FULL_SH(iio_event_all,
- sca3000_query_ring_int,
- sca3000_set_ring_int,
- SCA3000_INT_MASK_RING_HALF);
-
-IIO_EVENT_ATTR_RING_75_FULL_SH(iio_event_all,
- sca3000_query_ring_int,
- sca3000_set_ring_int,
- SCA3000_INT_MASK_RING_THREE_QUARTER);
+static IIO_CONST_ATTR_NAMED(accel_xayaz_mag_falling_period,
+ accel_x&y&z_mag_falling_period,
+ "0.226");
static struct attribute *sca3000_event_attributes[] = {
&iio_event_attr_accel_xayaz_mag_falling_en.dev_attr.attr,
&iio_const_attr_accel_xayaz_mag_falling_period.dev_attr.attr,
- &iio_event_attr_accel_x_mag_rising_en.dev_attr.attr,
- &iio_dev_attr_accel_x_raw_mag_rising_value.dev_attr.attr,
- &iio_event_attr_accel_y_mag_rising_en.dev_attr.attr,
- &iio_dev_attr_accel_y_raw_mag_rising_value.dev_attr.attr,
- &iio_event_attr_accel_z_mag_rising_en.dev_attr.attr,
- &iio_dev_attr_accel_z_raw_mag_rising_value.dev_attr.attr,
- &iio_event_attr_ring_50_full.dev_attr.attr,
- &iio_event_attr_ring_75_full.dev_attr.attr,
NULL,
};
static int sca3000_clean_setup(struct sca3000_state *st)
{
int ret;
- u8 *rx;
mutex_lock(&st->lock);
/* Ensure all interrupts have been acknowledged */
- ret = sca3000_read_data(st, SCA3000_REG_ADDR_INT_STATUS, &rx, 1);
+ ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_INT_STATUS, 1);
if (ret)
goto error_ret;
- kfree(rx);
/* Turn off all motion detection channels */
- ret = sca3000_read_ctrl_reg(st,
- SCA3000_REG_CTRL_SEL_MD_CTRL,
- &rx);
- if (ret)
+ ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_MD_CTRL);
+ if (ret < 0)
goto error_ret;
- ret = sca3000_write_ctrl_reg(st,
- SCA3000_REG_CTRL_SEL_MD_CTRL,
- rx[1] & SCA3000_MD_CTRL_PROT_MASK);
- kfree(rx);
+ ret = sca3000_write_ctrl_reg(st, SCA3000_REG_CTRL_SEL_MD_CTRL,
+ ret & SCA3000_MD_CTRL_PROT_MASK);
if (ret)
goto error_ret;
/* Disable ring buffer */
- sca3000_read_ctrl_reg(st,
- SCA3000_REG_CTRL_SEL_OUT_CTRL,
- &rx);
- /* Frequency of ring buffer sampling deliberately restricted to make
- * debugging easier - add control of this later */
- ret = sca3000_write_ctrl_reg(st,
- SCA3000_REG_CTRL_SEL_OUT_CTRL,
- (rx[1] & SCA3000_OUT_CTRL_PROT_MASK)
+ ret = sca3000_read_ctrl_reg(st, SCA3000_REG_CTRL_SEL_OUT_CTRL);
+ ret = sca3000_write_ctrl_reg(st, SCA3000_REG_CTRL_SEL_OUT_CTRL,
+ (ret & SCA3000_OUT_CTRL_PROT_MASK)
| SCA3000_OUT_CTRL_BUF_X_EN
| SCA3000_OUT_CTRL_BUF_Y_EN
| SCA3000_OUT_CTRL_BUF_Z_EN
| SCA3000_OUT_CTRL_BUF_DIV_4);
- kfree(rx);
-
if (ret)
goto error_ret;
/* Enable interrupts, relevant to mode and set up as active low */
- ret = sca3000_read_data(st,
- SCA3000_REG_ADDR_INT_MASK,
- &rx, 1);
+ ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_INT_MASK, 1);
if (ret)
goto error_ret;
ret = sca3000_write_reg(st,
SCA3000_REG_ADDR_INT_MASK,
- (rx[1] & SCA3000_INT_MASK_PROT_MASK)
+ (ret & SCA3000_INT_MASK_PROT_MASK)
| SCA3000_INT_MASK_ACTIVE_LOW);
- kfree(rx);
if (ret)
goto error_ret;
/* Select normal measurement mode, free fall off, ring off */
/* Ring in 12 bit mode - it is fine to overwrite reserved bits 3,5
* as that occurs in one of the example on the datasheet */
- ret = sca3000_read_data(st,
- SCA3000_REG_ADDR_MODE,
- &rx, 1);
+ ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_MODE, 1);
if (ret)
goto error_ret;
- ret = sca3000_write_reg(st,
- SCA3000_REG_ADDR_MODE,
- (rx[1] & SCA3000_MODE_PROT_MASK));
- kfree(rx);
+ ret = sca3000_write_reg(st, SCA3000_REG_ADDR_MODE,
+ (st->rx[0] & SCA3000_MODE_PROT_MASK));
st->bpse = 11;
error_ret:
return ret;
}
-static int __devinit __sca3000_probe(struct spi_device *spi,
- enum sca3000_variant variant)
+static int __devinit sca3000_probe(struct spi_device *spi)
{
int ret, regdone = 0;
struct sca3000_state *st;
}
spi_set_drvdata(spi, st);
- st->tx = kmalloc(sizeof(*st->tx)*6, GFP_KERNEL);
- if (st->tx == NULL) {
- ret = -ENOMEM;
- goto error_clear_st;
- }
- st->rx = kmalloc(sizeof(*st->rx)*3, GFP_KERNEL);
- if (st->rx == NULL) {
- ret = -ENOMEM;
- goto error_free_tx;
- }
st->us = spi;
mutex_init(&st->lock);
- st->info = &sca3000_spi_chip_info_tbl[variant];
+ st->info = &sca3000_spi_chip_info_tbl[spi_get_device_id(spi)
+ ->driver_data];
st->indio_dev = iio_allocate_device(0);
if (st->indio_dev == NULL) {
ret = -ENOMEM;
- goto error_free_rx;
+ goto error_clear_st;
}
-
st->indio_dev->dev.parent = &spi->dev;
st->indio_dev->num_interrupt_lines = 1;
st->indio_dev->event_attrs = &sca3000_event_attribute_group;
if (st->info->temp_output)
st->indio_dev->attrs = &sca3000_attribute_group_with_temp;
- else
+ else {
st->indio_dev->attrs = &sca3000_attribute_group;
+ st->indio_dev->channels = sca3000_channels;
+ st->indio_dev->num_channels = ARRAY_SIZE(sca3000_channels);
+ }
+ st->indio_dev->read_raw = &sca3000_read_raw;
+ st->indio_dev->read_event_value = &sca3000_read_thresh;
+ st->indio_dev->write_event_value = &sca3000_write_thresh;
+ st->indio_dev->read_event_config = &sca3000_read_event_config;
+ st->indio_dev->write_event_config = &sca3000_write_event_config;
st->indio_dev->dev_data = (void *)(st);
st->indio_dev->modes = INDIO_DIRECT_MODE;
sca3000_configure_ring(st->indio_dev);
-
ret = iio_device_register(st->indio_dev);
if (ret < 0)
goto error_free_dev;
regdone = 1;
- ret = iio_ring_buffer_register(st->indio_dev->ring, 0);
+ ret = iio_ring_buffer_register_ex(st->indio_dev->ring, 0,
+ sca3000_channels,
+ ARRAY_SIZE(sca3000_channels));
if (ret < 0)
goto error_unregister_dev;
if (spi->irq && gpio_is_valid(irq_to_gpio(spi->irq)) > 0) {
- INIT_WORK(&st->interrupt_handler_ws,
- sca3000_interrupt_handler_bh);
- ret = iio_register_interrupt_line(spi->irq,
- st->indio_dev,
- 0,
- IRQF_TRIGGER_FALLING,
- "sca3000");
+ ret = request_threaded_irq(spi->irq,
+ NULL,
+ &sca3000_event_handler,
+ IRQF_TRIGGER_FALLING,
+ "sca3000",
+ st->indio_dev);
if (ret)
goto error_unregister_ring;
- /* RFC
- * Probably a common situation. All interrupts need an ack
- * and there is only one handler so the complicated list system
- * is overkill. At very least a simpler registration method
- * might be worthwhile.
- */
- iio_add_event_to_list(
- iio_event_attr_accel_z_mag_rising_en.listel,
- &st->indio_dev
- ->interrupts[0]->ev_list);
}
sca3000_register_ring_funcs(st->indio_dev);
ret = sca3000_clean_setup(st);
if (ret)
- goto error_unregister_interrupt_line;
+ goto error_free_irq;
return 0;
-error_unregister_interrupt_line:
+error_free_irq:
if (spi->irq && gpio_is_valid(irq_to_gpio(spi->irq)) > 0)
- iio_unregister_interrupt_line(st->indio_dev, 0);
+ free_irq(spi->irq, st->indio_dev);
error_unregister_ring:
iio_ring_buffer_unregister(st->indio_dev->ring);
error_unregister_dev:
iio_device_unregister(st->indio_dev);
else
iio_free_device(st->indio_dev);
-error_free_rx:
- kfree(st->rx);
-error_free_tx:
- kfree(st->tx);
error_clear_st:
kfree(st);
error_ret:
static int sca3000_stop_all_interrupts(struct sca3000_state *st)
{
int ret;
- u8 *rx;
mutex_lock(&st->lock);
- ret = sca3000_read_data(st, SCA3000_REG_ADDR_INT_MASK, &rx, 1);
+ ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_INT_MASK, 1);
if (ret)
goto error_ret;
ret = sca3000_write_reg(st, SCA3000_REG_ADDR_INT_MASK,
- (rx[1] & ~(SCA3000_INT_MASK_RING_THREE_QUARTER
- | SCA3000_INT_MASK_RING_HALF
- | SCA3000_INT_MASK_ALL_INTS)));
+ (st->rx[0] &
+ ~(SCA3000_INT_MASK_RING_THREE_QUARTER |
+ SCA3000_INT_MASK_RING_HALF |
+ SCA3000_INT_MASK_ALL_INTS)));
error_ret:
- kfree(rx);
+ mutex_unlock(&st->lock);
return ret;
-
}
static int sca3000_remove(struct spi_device *spi)
if (ret)
return ret;
if (spi->irq && gpio_is_valid(irq_to_gpio(spi->irq)) > 0)
- iio_unregister_interrupt_line(indio_dev, 0);
+ free_irq(spi->irq, indio_dev);
iio_ring_buffer_unregister(indio_dev->ring);
sca3000_unconfigure_ring(indio_dev);
iio_device_unregister(indio_dev);
- kfree(st->tx);
- kfree(st->rx);
kfree(st);
return 0;
}
-/* These macros save on an awful lot of repeated code */
-#define SCA3000_VARIANT_PROBE(_name) \
- static int __devinit \
- sca3000_##_name##_probe(struct spi_device *spi) \
- { \
- return __sca3000_probe(spi, _name); \
- }
-
-#define SCA3000_VARIANT_SPI_DRIVER(_name) \
- struct spi_driver sca3000_##_name##_driver = { \
- .driver = { \
- .name = "sca3000_" #_name, \
- .owner = THIS_MODULE, \
- }, \
- .probe = sca3000_##_name##_probe, \
- .remove = __devexit_p(sca3000_remove), \
- }
-
-SCA3000_VARIANT_PROBE(d01);
-static SCA3000_VARIANT_SPI_DRIVER(d01);
-
-SCA3000_VARIANT_PROBE(e02);
-static SCA3000_VARIANT_SPI_DRIVER(e02);
-
-SCA3000_VARIANT_PROBE(e04);
-static SCA3000_VARIANT_SPI_DRIVER(e04);
+static const struct spi_device_id sca3000_id[] = {
+ {"sca3000_d01", d01},
+ {"sca3000_e02", e02},
+ {"sca3000_e04", e04},
+ {"sca3000_e05", e05},
+ {}
+};
-SCA3000_VARIANT_PROBE(e05);
-static SCA3000_VARIANT_SPI_DRIVER(e05);
+static struct spi_driver sca3000_driver = {
+ .driver = {
+ .name = "sca3000",
+ .owner = THIS_MODULE,
+ },
+ .probe = sca3000_probe,
+ .remove = __devexit_p(sca3000_remove),
+ .id_table = sca3000_id,
+};
static __init int sca3000_init(void)
{
- int ret;
-
- ret = spi_register_driver(&sca3000_d01_driver);
- if (ret)
- goto error_ret;
- ret = spi_register_driver(&sca3000_e02_driver);
- if (ret)
- goto error_unreg_d01;
- ret = spi_register_driver(&sca3000_e04_driver);
- if (ret)
- goto error_unreg_e02;
- ret = spi_register_driver(&sca3000_e05_driver);
- if (ret)
- goto error_unreg_e04;
-
- return 0;
-
-error_unreg_e04:
- spi_unregister_driver(&sca3000_e04_driver);
-error_unreg_e02:
- spi_unregister_driver(&sca3000_e02_driver);
-error_unreg_d01:
- spi_unregister_driver(&sca3000_d01_driver);
-error_ret:
-
- return ret;
+ return spi_register_driver(&sca3000_driver);
}
+module_init(sca3000_init);
static __exit void sca3000_exit(void)
{
- spi_unregister_driver(&sca3000_e05_driver);
- spi_unregister_driver(&sca3000_e04_driver);
- spi_unregister_driver(&sca3000_e02_driver);
- spi_unregister_driver(&sca3000_d01_driver);
+ spi_unregister_driver(&sca3000_driver);
}
-
-module_init(sca3000_init);
module_exit(sca3000_exit);
MODULE_AUTHOR("Jonathan Cameron <jic23@cam.ac.uk>");
#include <linux/kernel.h>
#include <linux/spi/spi.h>
#include <linux/sysfs.h>
+#include <linux/sched.h>
+#include <linux/poll.h>
#include "../iio.h"
#include "../sysfs.h"
* Currently scan elements aren't configured so it doesn't matter.
*/
+static int sca3000_read_data(struct sca3000_state *st,
+ uint8_t reg_address_high,
+ u8 **rx_p,
+ int len)
+{
+ int ret;
+ struct spi_message msg;
+ struct spi_transfer xfer[2] = {
+ {
+ .len = 1,
+ .tx_buf = st->tx,
+ }, {
+ .len = len,
+ }
+ };
+ *rx_p = kmalloc(len, GFP_KERNEL);
+ if (*rx_p == NULL) {
+ ret = -ENOMEM;
+ goto error_ret;
+ }
+ xfer[1].rx_buf = *rx_p;
+ st->tx[0] = SCA3000_READ_REG(reg_address_high);
+ spi_message_init(&msg);
+ spi_message_add_tail(&xfer[0], &msg);
+ spi_message_add_tail(&xfer[1], &msg);
+ ret = spi_sync(st->us, &msg);
+ if (ret) {
+ dev_err(get_device(&st->us->dev), "problem reading register");
+ goto error_free_rx;
+ }
+
+ return 0;
+error_free_rx:
+ kfree(*rx_p);
+error_ret:
+ return ret;
+}
+
/**
* sca3000_read_first_n_hw_rb() - main ring access, pulls data from ring
* @r: the ring
* Currently does not provide timestamps. As the hardware doesn't add them they
* can only be inferred approximately from ring buffer events such as 50% full
* and knowledge of when buffer was last emptied. This is left to userspace.
- *
- * Temporarily deliberately broken.
**/
static int sca3000_read_first_n_hw_rb(struct iio_ring_buffer *r,
size_t count, char __user *buf,
struct iio_dev *indio_dev = hw_ring->private;
struct sca3000_state *st = indio_dev->dev_data;
u8 *rx;
- s16 *samples;
int ret, i, num_available, num_read = 0;
int bytes_per_sample = 1;
- u8 *datas;
- u8 **data = &datas;
if (st->bpse == 11)
bytes_per_sample = 2;
mutex_lock(&st->lock);
- /* Check how much data is available:
- * RFC: Implement an ioctl to not bother checking whether there
- * is enough data in the ring? Afterall, if we are responding
- * to an interrupt we have a minimum content guaranteed so it
- * seems slight silly to waste time checking it is there.
- */
- ret = sca3000_read_data(st,
- SCA3000_REG_ADDR_BUF_COUNT,
- &rx, 1);
+ if (count % bytes_per_sample) {
+ ret = -EINVAL;
+ goto error_ret;
+ }
+
+ ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_BUF_COUNT, 1);
if (ret)
goto error_ret;
else
- num_available = rx[1];
- /* num_available is the total number of samples available
+ num_available = st->rx[0];
+ /*
+ * num_available is the total number of samples available
* i.e. number of time points * number of channels.
*/
- kfree(rx);
if (count > num_available * bytes_per_sample)
num_read = num_available*bytes_per_sample;
else
- num_read = count - (count % (bytes_per_sample));
+ num_read = count;
- /* Avoid the read request byte */
- *dead_offset = 1;
ret = sca3000_read_data(st,
SCA3000_REG_ADDR_RING_OUT,
- data, num_read);
-
- /* Convert byte order and shift to default resolution */
- if (st->bpse == 11) {
- samples = (s16*)(*data+1);
- for (i = 0; i < (num_read/2); i++) {
- samples[i] = be16_to_cpup(
- (__be16 *)&(samples[i]));
- samples[i] >>= 3;
- }
- }
+ &rx, num_read);
+ if (ret)
+ goto error_ret;
+
+ for (i = 0; i < num_read; i++)
+ *(((u16 *)rx) + i) = be16_to_cpup((u16 *)rx + i);
+ if (copy_to_user(buf, rx, num_read))
+ ret = -EFAULT;
+ kfree(rx);
+ r->stufftoread = 0;
error_ret:
mutex_unlock(&st->lock);
static IIO_RING_BYTES_PER_DATUM_ATTR;
static IIO_RING_LENGTH_ATTR;
+/**
+ * sca3000_query_ring_int() is the hardware ring status interrupt enabled
+ **/
+static ssize_t sca3000_query_ring_int(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
+ int ret, val;
+ struct iio_ring_buffer *ring = dev_get_drvdata(dev);
+ struct iio_dev *indio_dev = ring->indio_dev;
+ struct sca3000_state *st = indio_dev->dev_data;
+
+ mutex_lock(&st->lock);
+ ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_INT_MASK, 1);
+ val = st->rx[0];
+ mutex_unlock(&st->lock);
+ if (ret)
+ return ret;
+
+ return sprintf(buf, "%d\n", !!(val & this_attr->address));
+}
+
+/**
+ * sca3000_set_ring_int() set state of ring status interrupt
+ **/
+static ssize_t sca3000_set_ring_int(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t len)
+{
+ struct iio_ring_buffer *ring = dev_get_drvdata(dev);
+ struct iio_dev *indio_dev = ring->indio_dev;
+ struct sca3000_state *st = indio_dev->dev_data;
+ struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
+ long val;
+ int ret;
+
+ mutex_lock(&st->lock);
+ ret = strict_strtol(buf, 10, &val);
+ if (ret)
+ goto error_ret;
+ ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_INT_MASK, 1);
+ if (ret)
+ goto error_ret;
+ if (val)
+ ret = sca3000_write_reg(st,
+ SCA3000_REG_ADDR_INT_MASK,
+ st->rx[0] | this_attr->address);
+ else
+ ret = sca3000_write_reg(st,
+ SCA3000_REG_ADDR_INT_MASK,
+ st->rx[0] & ~this_attr->address);
+error_ret:
+ mutex_unlock(&st->lock);
+
+ return ret ? ret : len;
+}
+
+static IIO_DEVICE_ATTR(50_percent, S_IRUGO | S_IWUSR,
+ sca3000_query_ring_int,
+ sca3000_set_ring_int,
+ SCA3000_INT_MASK_RING_HALF);
+
+static IIO_DEVICE_ATTR(75_percent, S_IRUGO | S_IWUSR,
+ sca3000_query_ring_int,
+ sca3000_set_ring_int,
+ SCA3000_INT_MASK_RING_THREE_QUARTER);
+
+
/**
* sca3000_show_ring_bpse() -sysfs function to query bits per sample from ring
* @dev: ring buffer device
char *buf)
{
int len = 0, ret;
- u8 *rx;
struct iio_ring_buffer *ring = dev_get_drvdata(dev);
struct iio_dev *indio_dev = ring->indio_dev;
struct sca3000_state *st = indio_dev->dev_data;
mutex_lock(&st->lock);
- ret = sca3000_read_data(st, SCA3000_REG_ADDR_MODE, &rx, 1);
+ ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_MODE, 1);
if (ret)
goto error_ret;
- if (rx[1] & SCA3000_RING_BUF_8BIT)
+ if (st->rx[0] & SCA3000_RING_BUF_8BIT)
len = sprintf(buf, "s8/8\n");
else
len = sprintf(buf, "s11/16\n");
- kfree(rx);
error_ret:
mutex_unlock(&st->lock);
struct iio_dev *indio_dev = ring->indio_dev;
struct sca3000_state *st = indio_dev->dev_data;
int ret;
- u8 *rx;
mutex_lock(&st->lock);
- ret = sca3000_read_data(st, SCA3000_REG_ADDR_MODE, &rx, 1);
+ ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_MODE, 1);
if (ret)
goto error_ret;
- if (strncmp(buf, "s8/8", 4) == 0) {
+ if (sysfs_streq(buf, "s8/8")) {
ret = sca3000_write_reg(st, SCA3000_REG_ADDR_MODE,
- rx[1] | SCA3000_RING_BUF_8BIT);
+ st->rx[0] | SCA3000_RING_BUF_8BIT);
st->bpse = 8;
- } else if (strncmp(buf, "s11/16", 5) == 0) {
+ } else if (sysfs_streq(buf, "s11/16")) {
ret = sca3000_write_reg(st, SCA3000_REG_ADDR_MODE,
- rx[1] & ~SCA3000_RING_BUF_8BIT);
+ st->rx[0] & ~SCA3000_RING_BUF_8BIT);
st->bpse = 11;
} else
ret = -EINVAL;
return ret ? ret : len;
}
-static IIO_SCAN_EL_C(accel_x, 0, 0, NULL);
-static IIO_SCAN_EL_C(accel_y, 1, 0, NULL);
-static IIO_SCAN_EL_C(accel_z, 2, 0, NULL);
-static IIO_CONST_ATTR(accel_type_available, "s8/8 s11/16");
-static IIO_DEVICE_ATTR(accel_type,
- S_IRUGO | S_IWUSR,
- sca3000_show_ring_bpse,
- sca3000_store_ring_bpse,
- 0);
+static ssize_t sca3000_show_buffer_scale(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_ring_buffer *ring = dev_get_drvdata(dev);
+ struct iio_dev *indio_dev = ring->indio_dev;
+ struct sca3000_state *st = indio_dev->dev_data;
-static struct attribute *sca3000_scan_el_attrs[] = {
- &iio_scan_el_accel_x.dev_attr.attr,
- &iio_const_attr_accel_x_index.dev_attr.attr,
- &iio_scan_el_accel_y.dev_attr.attr,
- &iio_const_attr_accel_y_index.dev_attr.attr,
- &iio_scan_el_accel_z.dev_attr.attr,
- &iio_const_attr_accel_z_index.dev_attr.attr,
- &iio_const_attr_accel_type_available.dev_attr.attr,
- &iio_dev_attr_accel_type.dev_attr.attr,
- NULL
-};
+ return sprintf(buf, "0.%06d\n", 4*st->info->scale);
+}
-static struct attribute_group sca3000_scan_el_group = {
- .attrs = sca3000_scan_el_attrs,
- .name = "scan_elements",
-};
+static IIO_DEVICE_ATTR(accel_scale,
+ S_IRUGO,
+ sca3000_show_buffer_scale,
+ NULL,
+ 0);
/*
* Ring buffer attributes
&dev_attr_length.attr,
&dev_attr_bytes_per_datum.attr,
&dev_attr_enable.attr,
+ &iio_dev_attr_50_percent.dev_attr.attr,
+ &iio_dev_attr_75_percent.dev_attr.attr,
+ &iio_dev_attr_accel_scale.dev_attr.attr,
NULL,
};
ring = kzalloc(sizeof *ring, GFP_KERNEL);
if (!ring)
return NULL;
+
ring->private = indio_dev;
buf = &ring->buf;
+ buf->stufftoread = 0;
iio_ring_buffer_init(buf, indio_dev);
buf->dev.type = &sca3000_ring_type;
- device_initialize(&buf->dev);
buf->dev.parent = &indio_dev->dev;
dev_set_drvdata(&buf->dev, (void *)buf);
return -ENOMEM;
indio_dev->modes |= INDIO_RING_HARDWARE_BUFFER;
- indio_dev->ring->scan_el_attrs = &sca3000_scan_el_group;
indio_dev->ring->access.read_first_n = &sca3000_read_first_n_hw_rb;
indio_dev->ring->access.get_length = &sca3000_ring_get_length;
- indio_dev->ring->access.get_bytes_per_datum = &sca3000_ring_get_bytes_per_datum;
+ indio_dev->ring->access.get_bytes_per_datum =
+ &sca3000_ring_get_bytes_per_datum;
+
+ iio_scan_mask_set(indio_dev->ring, 0);
+ iio_scan_mask_set(indio_dev->ring, 1);
+ iio_scan_mask_set(indio_dev->ring, 2);
return 0;
}
{
struct sca3000_state *st = indio_dev->dev_data;
int ret;
- u8 *rx;
mutex_lock(&st->lock);
- ret = sca3000_read_data(st, SCA3000_REG_ADDR_MODE, &rx, 1);
+ ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_MODE, 1);
if (ret)
goto error_ret;
if (state) {
printk(KERN_INFO "supposedly enabling ring buffer\n");
ret = sca3000_write_reg(st,
SCA3000_REG_ADDR_MODE,
- (rx[1] | SCA3000_RING_BUF_ENABLE));
+ (st->rx[0] | SCA3000_RING_BUF_ENABLE));
} else
ret = sca3000_write_reg(st,
SCA3000_REG_ADDR_MODE,
- (rx[1] & ~SCA3000_RING_BUF_ENABLE));
- kfree(rx);
+ (st->rx[0] & ~SCA3000_RING_BUF_ENABLE));
error_ret:
mutex_unlock(&st->lock);
**/
void sca3000_ring_int_process(u8 val, struct iio_ring_buffer *ring)
{
- /*
- if (val & SCA3000_INT_STATUS_THREE_QUARTERS)
- iio_push_ring_event(ring,
- IIO_EVENT_CODE_RING_75_FULL,
- 0);
- else if (val & SCA3000_INT_STATUS_HALF)
- iio_push_ring_event(ring,
- IIO_EVENT_CODE_RING_50_FULL, 0);
- */
+ if (val & (SCA3000_INT_STATUS_THREE_QUARTERS |
+ SCA3000_INT_STATUS_HALF)) {
+ ring->stufftoread = true;
+ wake_up_interruptible(&ring->pollq);
+ }
}
projects / linux-beck.git / commitdiff