Skip to content

L
linux
Commit 25888dc5 authored by Jonathan Cameron's avatar Jonathan Cameron Committed by Greg Kroah-Hartman
Browse files
Options

staging:iio:sca3000 extract old event handling and move to poll for events from buffer 

Fairly substantial rewrite as the code had bitrotted.
A rethink is needed for how to handle variable types in the new chan_spec world.

This patch restores sca3000 buffer usage to a working state.
V3: Rebase fixups.
V2: Move to new version of IIO_CHAN macro
Signed-off-by: default avatarJonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 1e3345bc
Hide whitespace changes
Inline Side-by-side
Showing with 510 additions and 709 deletions
drivers/staging/iio/accel/sca3000.h
View file @ 25888dc5
......@@ -158,17 +158,17 @@
/**
* struct sca3000_state - device instance state information
* @us: the associated spi device
* @info: chip variant information
* @indio_dev: device information used by the IIO core
* @interrupt_handler_ws: event interrupt handler for all events
* @last_timestamp: the timestamp of the last event
* @mo_det_use_count: reference counter for the motion detection unit
* @lock: lock used to protect elements of sca3000_state
* and the underlying device state.
* @bpse: number of bits per scan element
* @tx: dma-able transmit buffer
* @rx: dma-able receive buffer
* @us: the associated spi device
* @info: chip variant information
* @indio_dev: device information used by the IIO core
* @interrupt_handler_ws: event interrupt handler for all events
* @last_timestamp: the timestamp of the last event
* @mo_det_use_count: reference counter for the motion detection unit
* @lock: lock used to protect elements of sca3000_state
* and the underlying device state.
* @bpse: number of bits per scan element
* @tx: dma-able transmit buffer
* @rx: dma-able receive buffer
**/
struct sca3000_state {
struct spi_device *us;
......@@ -179,15 +179,15 @@ struct sca3000_state {
int mo_det_use_count;
struct mutex lock;
int bpse;
u8 *tx;
/* not used during a ring buffer read */
u8 *rx;
/* Can these share a cacheline ? */
u8 rx[2] ____cacheline_aligned;
u8 tx[6] ____cacheline_aligned;
};
/**
* struct sca3000_chip_info - model dependent parameters
* @name: model identification
* @scale: string containing floating point scale factor
* @name: model identification
* @scale: scale * 10^-6
* @temp_output: some devices have temperature sensors.
* @measurement_mode_freq: normal mode sampling frequency
* @option_mode_1: first optional mode. Not all models have one
......@@ -200,29 +200,20 @@ struct sca3000_state {
**/
struct sca3000_chip_info {
const char *name;
const char *scale;
unsigned int scale;
bool temp_output;
int measurement_mode_freq;
int option_mode_1;
int option_mode_1_freq;
int option_mode_2;
int option_mode_2_freq;
int mot_det_mult_xz[6];
int mot_det_mult_y[7];
};
/**
* sca3000_read_data() read a series of values from the device
* @dev: device
* @reg_address_high: start address (decremented read)
* @rx: pointer where received data is placed. Callee
* responsible for freeing this.
* @len: number of bytes to read
*
* The main lock must be held.
**/
int sca3000_read_data(struct sca3000_state *st,
u8 reg_address_high,
u8 **rx_p,
int len);
int sca3000_read_data_short(struct sca3000_state *st,
u8 reg_address_high,
int len);
/**
* sca3000_write_reg() write a single register
......@@ -233,29 +224,6 @@ int sca3000_read_data(struct sca3000_state *st,
**/
int sca3000_write_reg(struct sca3000_state *st, u8 address, u8 val);
/* Conversion function for use with the ring buffer when in 11bit mode */
static inline int sca3000_11bit_convert(uint8_t msb, uint8_t lsb)
{
int16_t val;
val = ((lsb >> 3) & 0x1C) | (msb << 5);
val |= (val & (1 << 12)) ? 0xE000 : 0;
return val;
}
static inline int sca3000_13bit_convert(uint8_t msb, uint8_t lsb)
{
s16 val;
val = ((lsb >> 3) & 0x1F) | (msb << 5);
/* sign fill */
val |= (val & (1 << 12)) ? 0xE000 : 0;
return val;
}
#ifdef CONFIG_IIO_RING_BUFFER
/**
* sca3000_register_ring_funcs() setup the ring state change functions
......
drivers/staging/iio/accel/sca3000_core.c
View file @ 25888dc5
......@@ -42,93 +42,73 @@ enum sca3000_variant {
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
*
......@@ -136,17 +116,13 @@ int sca3000_read_data(struct sca3000_state *st,
**/
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);
}
/**
......@@ -161,19 +137,15 @@ static int __sca3000_unlock_reg_lock(struct sca3000_state *st)
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,
},
};
......@@ -236,8 +208,7 @@ static int sca3000_write_ctrl_reg(struct sca3000_state *st,
* 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;
......@@ -253,8 +224,11 @@ static int sca3000_read_ctrl_reg(struct sca3000_state *st,
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;
}
......@@ -267,20 +241,18 @@ static int sca3000_read_ctrl_reg(struct sca3000_state *st,
**/
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);
......@@ -288,45 +260,6 @@ static int sca3000_check_status(struct device *dev)
}
#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)
......@@ -346,18 +279,14 @@ static ssize_t sca3000_show_rev(struct device *dev,
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);
......@@ -410,15 +339,14 @@ sca3000_show_measurement_mode(struct device *dev,
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;
......@@ -462,7 +390,6 @@ sca3000_store_measurement_mode(struct device *dev,
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;
......@@ -470,20 +397,18 @@ sca3000_store_measurement_mode(struct device *dev,
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);
......@@ -507,16 +432,72 @@ static IIO_DEVICE_ATTR(measurement_mode, S_IRUGO | S_IWUSR,
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
......@@ -532,15 +513,16 @@ static ssize_t sca3000_read_av_freq(struct device *dev,
{
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,
......@@ -560,7 +542,6 @@ static ssize_t sca3000_read_av_freq(struct device *dev,
st->info->option_mode_2_freq/4);
break;
}
kfree(rx);
return len;
error_ret:
return ret;
......@@ -575,12 +556,11 @@ static inline int __sca3000_get_base_freq(struct sca3000_state *st,
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;
......@@ -591,7 +571,6 @@ static inline int __sca3000_get_base_freq(struct sca3000_state *st,
*base_freq = info->option_mode_2_freq;
break;
}
kfree(rx);
error_ret:
return ret;
}
......@@ -605,18 +584,19 @@ static ssize_t sca3000_read_frequency(struct device *dev,
{
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);
......@@ -628,7 +608,7 @@ static ssize_t sca3000_read_frequency(struct device *dev,
len = sprintf(buf, "%d\n", base_freq/4);
break;
}
kfree(rx);
return len;
error_ret_mut:
mutex_unlock(&st->lock);
......@@ -647,7 +627,7 @@ static ssize_t sca3000_set_frequency(struct device *dev,
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);
......@@ -660,21 +640,23 @@ static ssize_t sca3000_set_frequency(struct device *dev,
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);
......@@ -704,17 +686,14 @@ static ssize_t sca3000_read_temp(struct device *dev,
{
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;
......@@ -725,80 +704,72 @@ static IIO_CONST_ATTR_TEMP_SCALE("0.555556");
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,
......@@ -809,10 +780,6 @@ static struct attribute *sca3000_attributes[] = {
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,
......@@ -836,134 +803,102 @@ static const struct attribute_group sca3000_attribute_group_with_temp = {
/* 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
......@@ -973,80 +908,20 @@ static ssize_t sca3000_query_free_fall_mode(struct device *dev,
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
......@@ -1065,7 +940,6 @@ static ssize_t sca3000_set_free_fall_mode(struct device *dev,
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);
......@@ -1074,20 +948,18 @@ static ssize_t sca3000_set_free_fall_mode(struct device *dev,
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);
......@@ -1103,73 +975,65 @@ static ssize_t sca3000_set_free_fall_mode(struct device *dev,
* 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,
......@@ -1179,51 +1043,13 @@ 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,
};
......@@ -1241,70 +1067,50 @@ static struct attribute_group sca3000_event_attribute_group = {
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:
......@@ -1312,8 +1118,7 @@ static int sca3000_clean_setup(struct sca3000_state *st)
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;
......@@ -1325,75 +1130,63 @@ static int __devinit __sca3000_probe(struct spi_device *spi,
}
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:
......@@ -1402,10 +1195,6 @@ static int __devinit __sca3000_probe(struct spi_device *spi,
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:
......@@ -1415,20 +1204,19 @@ static int __devinit __sca3000_probe(struct spi_device *spi,
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)
......@@ -1441,87 +1229,44 @@ 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>");
......
drivers/staging/iio/accel/sca3000_ring.c
View file @ 25888dc5
......@@ -17,6 +17,8 @@
#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"
......@@ -34,6 +36,44 @@
* 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
......@@ -45,8 +85,6 @@
* 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,
......@@ -56,54 +94,45 @@ static int sca3000_read_first_n_hw_rb(struct iio_ring_buffer *r,
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);
......@@ -131,6 +160,76 @@ static IIO_RING_ENABLE_ATTR;
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
......@@ -142,20 +241,18 @@ static ssize_t sca3000_show_ring_bpse(struct device *dev,
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);
......@@ -178,20 +275,19 @@ static ssize_t sca3000_store_ring_bpse(struct device *dev,
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;
......@@ -201,32 +297,22 @@ static ssize_t sca3000_store_ring_bpse(struct device *dev,
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
......@@ -238,6 +324,9 @@ static struct attribute *sca3000_ring_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,
};
......@@ -263,11 +352,12 @@ static struct iio_ring_buffer *sca3000_rb_allocate(struct iio_dev *indio_dev)
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);
......@@ -287,10 +377,14 @@ int sca3000_configure_ring(struct iio_dev *indio_dev)
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;
}
......@@ -305,22 +399,20 @@ int __sca3000_hw_ring_state_set(struct iio_dev *indio_dev, bool state)
{
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);
......@@ -357,13 +449,9 @@ void sca3000_register_ring_funcs(struct iio_dev *indio_dev)
**/
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);
}
}
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7