Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-04 18:13:04 +00:00
Code Issues Packages Projects Releases Wiki Activity

staging:iio:adis16201: Use adis library

Browse Source 
Use the new adis library for the adis16201 driver. This allows us to completely
scrap the adis16201 buffer and trigger code and more than half of the core
driver code.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Lars-Peter Clausen 2012-11-13 13:28:00 +00:00 committed by Jonathan Cameron
parent ccd2b52f4a
commit 6d78e862ac
6 changed files with 69 additions and 697 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/staging/iio/accel/Kconfig
View File

@ -6,8 +6,8 @@ menu "Accelerometers"
config ADIS16201
tristate "Analog Devices ADIS16201 Dual-Axis Digital Inclinometer and Accelerometer"
depends on SPI
select IIO_TRIGGER if IIO_BUFFER
select IIO_SW_RING if IIO_BUFFER
select IIO_ADIS_LIB
select IIO_ADIS_LIB_BUFFER if IIO_BUFFER
help
Say yes here to build support for Analog Devices adis16201 dual-axis
digital inclinometer and accelerometer.

1
drivers/staging/iio/accel/Makefile
View File

@ -3,7 +3,6 @@
#
adis16201-y := adis16201_core.o
adis16201-$(CONFIG_IIO_BUFFER) += adis16201_ring.o adis16201_trigger.o
obj-$(CONFIG_ADIS16201) += adis16201.o
adis16203-y := adis16203_core.o

89
drivers/staging/iio/accel/adis16201.h
View File

@ -3,9 +3,6 @@
#define ADIS16201_STARTUP_DELAY 220 /* ms */
#define ADIS16201_READ_REG(a) a
#define ADIS16201_WRITE_REG(a) ((a) | 0x80)
#define ADIS16201_FLASH_CNT 0x00 /* Flash memory write count */
#define ADIS16201_SUPPLY_OUT 0x02 /* Output, power supply */
#define ADIS16201_XACCL_OUT 0x04 /* Output, x-axis accelerometer */
@ -36,8 +33,6 @@
#define ADIS16201_DIAG_STAT 0x3C /* Diagnostics, system status register */
#define ADIS16201_GLOB_CMD 0x3E /* Operation, system command register */
#define ADIS16201_OUTPUTS 7
/* MSC_CTRL */
#define ADIS16201_MSC_CTRL_SELF_TEST_EN (1 << 8) /* Self-test enable */
#define ADIS16201_MSC_CTRL_DATA_RDY_EN (1 << 2) /* Data-ready enable: 1 = enabled, 0 = disabled */
@ -47,95 +42,25 @@
/* DIAG_STAT */
#define ADIS16201_DIAG_STAT_ALARM2 (1<<9) /* Alarm 2 status: 1 = alarm active, 0 = alarm inactive */
#define ADIS16201_DIAG_STAT_ALARM1 (1<<8) /* Alarm 1 status: 1 = alarm active, 0 = alarm inactive */
#define ADIS16201_DIAG_STAT_SPI_FAIL (1<<3) /* SPI communications failure */
#define ADIS16201_DIAG_STAT_FLASH_UPT (1<<2) /* Flash update failure */
#define ADIS16201_DIAG_STAT_POWER_HIGH (1<<1) /* Power supply above 3.625 V */
#define ADIS16201_DIAG_STAT_POWER_LOW (1<<0) /* Power supply below 3.15 V */
#define ADIS16201_DIAG_STAT_SPI_FAIL_BIT 3 /* SPI communications failure */
#define ADIS16201_DIAG_STAT_FLASH_UPT_BIT 2 /* Flash update failure */
#define ADIS16201_DIAG_STAT_POWER_HIGH_BIT 1 /* Power supply above 3.625 V */
#define ADIS16201_DIAG_STAT_POWER_LOW_BIT 0 /* Power supply below 3.15 V */
/* GLOB_CMD */
#define ADIS16201_GLOB_CMD_SW_RESET (1<<7)
#define ADIS16201_GLOB_CMD_FACTORY_CAL (1<<1)
#define ADIS16201_MAX_TX 14
#define ADIS16201_MAX_RX 14
#define ADIS16201_ERROR_ACTIVE (1<<14)
/**
* struct adis16201_state - device instance specific data
* @us: actual spi_device
* @trig: data ready trigger registered with iio
* @tx: transmit buffer
* @rx: receive buffer
* @buf_lock: mutex to protect tx and rx
**/
struct adis16201_state {
struct spi_device *us;
struct iio_trigger *trig;
struct mutex buf_lock;
u8 tx[14] ____cacheline_aligned;
u8 rx[14];
};
int adis16201_set_irq(struct iio_dev *indio_dev, bool enable);
enum adis16201_scan {
ADIS16201_SCAN_SUPPLY,
ADIS16201_SCAN_ACC_X,
ADIS16201_SCAN_ACC_Y,
ADIS16201_SCAN_AUX_ADC,
ADIS16201_SCAN_TEMP,
ADIS16201_SCAN_INCLI_X,
ADIS16201_SCAN_INCLI_Y,
ADIS16201_SCAN_SUPPLY,
ADIS16201_SCAN_AUX_ADC,
ADIS16201_SCAN_TEMP,
};
#ifdef CONFIG_IIO_BUFFER
void adis16201_remove_trigger(struct iio_dev *indio_dev);
int adis16201_probe_trigger(struct iio_dev *indio_dev);
ssize_t adis16201_read_data_from_ring(struct device *dev,
struct device_attribute *attr,
char *buf);
int adis16201_configure_ring(struct iio_dev *indio_dev);
void adis16201_unconfigure_ring(struct iio_dev *indio_dev);
#else /* CONFIG_IIO_BUFFER */
static inline void adis16201_remove_trigger(struct iio_dev *indio_dev)
{
}
static inline int adis16201_probe_trigger(struct iio_dev *indio_dev)
{
return 0;
}
static inline ssize_t
adis16201_read_data_from_ring(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return 0;
}
static int adis16201_configure_ring(struct iio_dev *indio_dev)
{
return 0;
}
static inline void adis16201_unconfigure_ring(struct iio_dev *indio_dev)
{
}
static inline int adis16201_initialize_ring(struct iio_ring_buffer *ring)
{
return 0;
}
static inline void adis16201_uninitialize_ring(struct iio_ring_buffer *ring)
{
}
#endif /* CONFIG_IIO_BUFFER */
#endif /* SPI_ADIS16201_H_ */

465
drivers/staging/iio/accel/adis16201_core.c
View File

@ -20,256 +20,13 @@
#include <linux/iio/buffer.h>
#include "adis16201.h"
#include "../imu/adis.h"
enum adis16201_chan {
in_supply,
temp,
accel_x,
accel_y,
incli_x,
incli_y,
in_aux,
};
/**
* adis16201_spi_write_reg_8() - write single byte to a register
* @dev: device associated with child of actual device (iio_dev or iio_trig)
* @reg_address: the address of the register to be written
* @val: the value to write
**/
static int adis16201_spi_write_reg_8(struct iio_dev *indio_dev,
u8 reg_address,
u8 val)
{
int ret;
struct adis16201_state *st = iio_priv(indio_dev);
mutex_lock(&st->buf_lock);
st->tx[0] = ADIS16201_WRITE_REG(reg_address);
st->tx[1] = val;
ret = spi_write(st->us, st->tx, 2);
mutex_unlock(&st->buf_lock);
return ret;
}
/**
* adis16201_spi_write_reg_16() - write 2 bytes to a pair of registers
* @indio_dev: iio device associated with child of actual device
* @reg_address: the address of the lower of the two registers. Second register
* is assumed to have address one greater.
* @val: value to be written
**/
static int adis16201_spi_write_reg_16(struct iio_dev *indio_dev,
u8 lower_reg_address,
u16 value)
{
int ret;
struct spi_message msg;
struct adis16201_state *st = iio_priv(indio_dev);
struct spi_transfer xfers[] = {
{
.tx_buf = st->tx,
.bits_per_word = 8,
.len = 2,
.cs_change = 1,
}, {
.tx_buf = st->tx + 2,
.bits_per_word = 8,
.len = 2,
},
};
mutex_lock(&st->buf_lock);
st->tx[0] = ADIS16201_WRITE_REG(lower_reg_address);
st->tx[1] = value & 0xFF;
st->tx[2] = ADIS16201_WRITE_REG(lower_reg_address + 1);
st->tx[3] = (value >> 8) & 0xFF;
spi_message_init(&msg);
spi_message_add_tail(&xfers[0], &msg);
spi_message_add_tail(&xfers[1], &msg);
ret = spi_sync(st->us, &msg);
mutex_unlock(&st->buf_lock);
return ret;
}
/**
* adis16201_spi_read_reg_16() - read 2 bytes from a 16-bit register
* @indio_dev: iio device associated with child of actual device
* @reg_address: the address of the lower of the two registers. Second register
* is assumed to have address one greater.
* @val: somewhere to pass back the value read
**/
static int adis16201_spi_read_reg_16(struct iio_dev *indio_dev,
u8 lower_reg_address,
u16 *val)
{
struct spi_message msg;
struct adis16201_state *st = iio_priv(indio_dev);
int ret;
struct spi_transfer xfers[] = {
{
.tx_buf = st->tx,
.bits_per_word = 8,
.len = 2,
.cs_change = 1,
.delay_usecs = 20,
}, {
.rx_buf = st->rx,
.bits_per_word = 8,
.len = 2,
.delay_usecs = 20,
},
};
mutex_lock(&st->buf_lock);
st->tx[0] = ADIS16201_READ_REG(lower_reg_address);
st->tx[1] = 0;
spi_message_init(&msg);
spi_message_add_tail(&xfers[0], &msg);
spi_message_add_tail(&xfers[1], &msg);
ret = spi_sync(st->us, &msg);
if (ret) {
dev_err(&st->us->dev, "problem when reading 16 bit register 0x%02X",
lower_reg_address);
goto error_ret;
}
*val = (st->rx[0] << 8) | st->rx[1];
error_ret:
mutex_unlock(&st->buf_lock);
return ret;
}
static int adis16201_reset(struct iio_dev *indio_dev)
{
int ret;
struct adis16201_state *st = iio_priv(indio_dev);
ret = adis16201_spi_write_reg_8(indio_dev,
ADIS16201_GLOB_CMD,
ADIS16201_GLOB_CMD_SW_RESET);
if (ret)
dev_err(&st->us->dev, "problem resetting device");
return ret;
}
int adis16201_set_irq(struct iio_dev *indio_dev, bool enable)
{
int ret = 0;
u16 msc;
ret = adis16201_spi_read_reg_16(indio_dev, ADIS16201_MSC_CTRL, &msc);
if (ret)
goto error_ret;
msc |= ADIS16201_MSC_CTRL_ACTIVE_HIGH;
msc &= ~ADIS16201_MSC_CTRL_DATA_RDY_DIO1;
if (enable)
msc |= ADIS16201_MSC_CTRL_DATA_RDY_EN;
else
msc &= ~ADIS16201_MSC_CTRL_DATA_RDY_EN;
ret = adis16201_spi_write_reg_16(indio_dev, ADIS16201_MSC_CTRL, msc);
error_ret:
return ret;
}
static int adis16201_check_status(struct iio_dev *indio_dev)
{
u16 status;
int ret;
ret = adis16201_spi_read_reg_16(indio_dev,
ADIS16201_DIAG_STAT, &status);
if (ret < 0) {
dev_err(&indio_dev->dev, "Reading status failed\n");
goto error_ret;
}
ret = status & 0xF;
if (ret)
ret = -EFAULT;
if (status & ADIS16201_DIAG_STAT_SPI_FAIL)
dev_err(&indio_dev->dev, "SPI failure\n");
if (status & ADIS16201_DIAG_STAT_FLASH_UPT)
dev_err(&indio_dev->dev, "Flash update failed\n");
if (status & ADIS16201_DIAG_STAT_POWER_HIGH)
dev_err(&indio_dev->dev, "Power supply above 3.625V\n");
if (status & ADIS16201_DIAG_STAT_POWER_LOW)
dev_err(&indio_dev->dev, "Power supply below 3.15V\n");
error_ret:
return ret;
}
static int adis16201_self_test(struct iio_dev *indio_dev)
{
int ret;
ret = adis16201_spi_write_reg_16(indio_dev,
ADIS16201_MSC_CTRL,
ADIS16201_MSC_CTRL_SELF_TEST_EN);
if (ret) {
dev_err(&indio_dev->dev, "problem starting self test");
goto err_ret;
}
ret = adis16201_check_status(indio_dev);
err_ret:
return ret;
}
static int adis16201_initial_setup(struct iio_dev *indio_dev)
{
int ret;
struct device *dev = &indio_dev->dev;
/* Disable IRQ */
ret = adis16201_set_irq(indio_dev, false);
if (ret) {
dev_err(dev, "disable irq failed");
goto err_ret;
}
/* Do self test */
ret = adis16201_self_test(indio_dev);
if (ret) {
dev_err(dev, "self test failure");
goto err_ret;
}
/* Read status register to check the result */
ret = adis16201_check_status(indio_dev);
if (ret) {
adis16201_reset(indio_dev);
dev_err(dev, "device not playing ball -> reset");
msleep(ADIS16201_STARTUP_DELAY);
ret = adis16201_check_status(indio_dev);
if (ret) {
dev_err(dev, "giving up");
goto err_ret;
}
}
err_ret:
return ret;
}
static u8 adis16201_addresses[7][2] = {
[in_supply] = { ADIS16201_SUPPLY_OUT, },
[temp] = { ADIS16201_TEMP_OUT },
[accel_x] = { ADIS16201_XACCL_OUT, ADIS16201_XACCL_OFFS },
[accel_y] = { ADIS16201_YACCL_OUT, ADIS16201_YACCL_OFFS },
[in_aux] = { ADIS16201_AUX_ADC },
[incli_x] = { ADIS16201_XINCL_OUT },
[incli_y] = { ADIS16201_YINCL_OUT },
static const u8 adis16201_addresses[] = {
[ADIS16201_SCAN_ACC_X] = ADIS16201_XACCL_OFFS,
[ADIS16201_SCAN_ACC_Y] = ADIS16201_YACCL_OFFS,
[ADIS16201_SCAN_INCLI_X] = ADIS16201_XINCL_OFFS,
[ADIS16201_SCAN_INCLI_Y] = ADIS16201_YINCL_OFFS,
};
static int adis16201_read_raw(struct iio_dev *indio_dev,
@ -277,6 +34,7 @@ static int adis16201_read_raw(struct iio_dev *indio_dev,
int *val, int *val2,
long mask)
{
struct adis *st = iio_priv(indio_dev);
int ret;
int bits;
u8 addr;
@ -284,29 +42,8 @@ static int adis16201_read_raw(struct iio_dev *indio_dev,
switch (mask) {
case IIO_CHAN_INFO_RAW:
mutex_lock(&indio_dev->mlock);
addr = adis16201_addresses[chan->address][0];
ret = adis16201_spi_read_reg_16(indio_dev, addr, &val16);
if (ret) {
mutex_unlock(&indio_dev->mlock);
return ret;
}
if (val16 & ADIS16201_ERROR_ACTIVE) {
ret = adis16201_check_status(indio_dev);
if (ret) {
mutex_unlock(&indio_dev->mlock);
return ret;
}
}
val16 = val16 & ((1 << chan->scan_type.realbits) - 1);
if (chan->scan_type.sign == 's')
val16 = (s16)(val16 <<
(16 - chan->scan_type.realbits)) >>
(16 - chan->scan_type.realbits);
*val = val16;
mutex_unlock(&indio_dev->mlock);
return IIO_VAL_INT;
return adis_single_conversion(indio_dev, chan,
ADIS16201_ERROR_ACTIVE, val);
case IIO_CHAN_INFO_SCALE:
switch (chan->type) {
case IIO_VOLTAGE:
@ -349,8 +86,8 @@ static int adis16201_read_raw(struct iio_dev *indio_dev,
return -EINVAL;
}
mutex_lock(&indio_dev->mlock);
addr = adis16201_addresses[chan->address][1];
ret = adis16201_spi_read_reg_16(indio_dev, addr, &val16);
addr = adis16201_addresses[chan->scan_index];
ret = adis_read_reg_16(st, addr, &val16);
if (ret) {
mutex_unlock(&indio_dev->mlock);
return ret;
@ -370,6 +107,7 @@ static int adis16201_write_raw(struct iio_dev *indio_dev,
int val2,
long mask)
{
struct adis *st = iio_priv(indio_dev);
int bits;
s16 val16;
u8 addr;
@ -386,111 +124,24 @@ static int adis16201_write_raw(struct iio_dev *indio_dev,
return -EINVAL;
}
val16 = val & ((1 << bits) - 1);
addr = adis16201_addresses[chan->address][1];
return adis16201_spi_write_reg_16(indio_dev, addr, val16);
addr = adis16201_addresses[chan->scan_index];
return adis_write_reg_16(st, addr, val16);
}
return -EINVAL;
}
static const struct iio_chan_spec adis16201_channels[] = {
{
.type = IIO_VOLTAGE,
.indexed = 1,
.channel = 0,
.extend_name = "supply",
.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
.address = in_supply,
.scan_index = ADIS16201_SCAN_SUPPLY,
.scan_type = {
.sign = 'u',
.realbits = 12,
.storagebits = 16,
},
}, {
.type = IIO_TEMP,
.indexed = 1,
.channel = 0,
.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
IIO_CHAN_INFO_SCALE_SEPARATE_BIT |
IIO_CHAN_INFO_OFFSET_SEPARATE_BIT,
.address = temp,
.scan_index = ADIS16201_SCAN_TEMP,
.scan_type = {
.sign = 'u',
.realbits = 12,
.storagebits = 16,
},
}, {
.type = IIO_ACCEL,
.modified = 1,
.channel2 = IIO_MOD_X,
.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
IIO_CHAN_INFO_SCALE_SHARED_BIT |
IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
.address = accel_x,
.scan_index = ADIS16201_SCAN_ACC_X,
.scan_type = {
.sign = 's',
.realbits = 14,
.storagebits = 16,
},
}, {
.type = IIO_ACCEL,
.modified = 1,
.channel2 = IIO_MOD_Y,
.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
IIO_CHAN_INFO_SCALE_SHARED_BIT |
IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
.address = accel_y,
.scan_index = ADIS16201_SCAN_ACC_Y,
.scan_type = {
.sign = 's',
.realbits = 14,
.storagebits = 16,
},
}, {
.type = IIO_VOLTAGE,
.indexed = 1,
.channel = 1,
.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
.address = in_aux,
.scan_index = ADIS16201_SCAN_AUX_ADC,
.scan_type = {
.sign = 'u',
.realbits = 12,
.storagebits = 16,
},
}, {
.type = IIO_INCLI,
.modified = 1,
.channel2 = IIO_MOD_X,
.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
IIO_CHAN_INFO_SCALE_SHARED_BIT |
IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
.address = incli_x,
.scan_index = ADIS16201_SCAN_INCLI_X,
.scan_type = {
.sign = 's',
.realbits = 14,
.storagebits = 16,
},
}, {
.type = IIO_INCLI,
.modified = 1,
.channel2 = IIO_MOD_Y,
.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
IIO_CHAN_INFO_SCALE_SHARED_BIT |
IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
.address = incli_y,
.scan_index = ADIS16201_SCAN_INCLI_Y,
.scan_type = {
.sign = 's',
.realbits = 14,
.storagebits = 16,
},
},
ADIS_SUPPLY_CHAN(ADIS16201_SUPPLY_OUT, ADIS16201_SCAN_SUPPLY, 12),
ADIS_TEMP_CHAN(ADIS16201_TEMP_OUT, ADIS16201_SCAN_TEMP, 12),
ADIS_ACCEL_CHAN(X, ADIS16201_XACCL_OUT, ADIS16201_SCAN_ACC_X,
IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, 14),
ADIS_ACCEL_CHAN(Y, ADIS16201_YACCL_OUT, ADIS16201_SCAN_ACC_Y,
IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, 14),
ADIS_AUX_ADC_CHAN(ADIS16201_AUX_ADC, ADIS16201_SCAN_AUX_ADC, 12),
ADIS_INCLI_CHAN(X, ADIS16201_XINCL_OUT, ADIS16201_SCAN_INCLI_X,
IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, 14),
ADIS_INCLI_CHAN(X, ADIS16201_YINCL_OUT, ADIS16201_SCAN_INCLI_Y,
IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, 14),
IIO_CHAN_SOFT_TIMESTAMP(7)
};
@ -500,10 +151,33 @@ static const struct iio_info adis16201_info = {
.driver_module = THIS_MODULE,
};
static const char * const adis16201_status_error_msgs[] = {
[ADIS16201_DIAG_STAT_SPI_FAIL_BIT] = "SPI failure",
[ADIS16201_DIAG_STAT_FLASH_UPT_BIT] = "Flash update failed",
[ADIS16201_DIAG_STAT_POWER_HIGH_BIT] = "Power supply above 3.625V",
[ADIS16201_DIAG_STAT_POWER_LOW_BIT] = "Power supply below 3.15V",
};
static const struct adis_data adis16201_data = {
.read_delay = 20,
.msc_ctrl_reg = ADIS16201_MSC_CTRL,
.glob_cmd_reg = ADIS16201_GLOB_CMD,
.diag_stat_reg = ADIS16201_DIAG_STAT,
.self_test_mask = ADIS16201_MSC_CTRL_SELF_TEST_EN,
.startup_delay = ADIS16201_STARTUP_DELAY,
.status_error_msgs = adis16201_status_error_msgs,
.status_error_mask = BIT(ADIS16201_DIAG_STAT_SPI_FAIL_BIT) |
BIT(ADIS16201_DIAG_STAT_FLASH_UPT_BIT) |
BIT(ADIS16201_DIAG_STAT_POWER_HIGH_BIT) |
BIT(ADIS16201_DIAG_STAT_POWER_LOW_BIT),
};
static int __devinit adis16201_probe(struct spi_device *spi)
{
int ret;
struct adis16201_state *st;
struct adis *st;
struct iio_dev *indio_dev;
/* setup the industrialio driver allocated elements */
@ -516,9 +190,6 @@ static int __devinit adis16201_probe(struct spi_device *spi)
/* this is only used for removal purposes */
spi_set_drvdata(spi, indio_dev);
st->us = spi;
mutex_init(&st->buf_lock);
indio_dev->name = spi->dev.driver->name;
indio_dev->dev.parent = &spi->dev;
indio_dev->info = &adis16201_info;
@ -527,40 +198,25 @@ static int __devinit adis16201_probe(struct spi_device *spi)
indio_dev->num_channels = ARRAY_SIZE(adis16201_channels);
indio_dev->modes = INDIO_DIRECT_MODE;
ret = adis16201_configure_ring(indio_dev);
ret = adis_init(st, indio_dev, spi, &adis16201_data);
if (ret)
goto error_free_dev;
ret = adis_setup_buffer_and_trigger(st, indio_dev, NULL);
if (ret)
goto error_free_dev;
ret = iio_buffer_register(indio_dev,
adis16201_channels,
ARRAY_SIZE(adis16201_channels));
if (ret) {
printk(KERN_ERR "failed to initialize the ring\n");
goto error_unreg_ring_funcs;
}
if (spi->irq) {
ret = adis16201_probe_trigger(indio_dev);
if (ret)
goto error_uninitialize_ring;
}
/* Get the device into a sane initial state */
ret = adis16201_initial_setup(indio_dev);
ret = adis_initial_startup(st);
if (ret)
goto error_remove_trigger;
goto error_cleanup_buffer_trigger;
ret = iio_device_register(indio_dev);
if (ret < 0)
goto error_remove_trigger;
goto error_cleanup_buffer_trigger;
return 0;
error_remove_trigger:
adis16201_remove_trigger(indio_dev);
error_uninitialize_ring:
iio_buffer_unregister(indio_dev);
error_unreg_ring_funcs:
adis16201_unconfigure_ring(indio_dev);
error_cleanup_buffer_trigger:
adis_cleanup_buffer_and_trigger(st, indio_dev);
error_free_dev:
iio_device_free(indio_dev);
error_ret:
@ -570,11 +226,10 @@ error_ret:
static int __devexit adis16201_remove(struct spi_device *spi)
{
struct iio_dev *indio_dev = spi_get_drvdata(spi);
struct adis *st = iio_priv(indio_dev);
iio_device_unregister(indio_dev);
adis16201_remove_trigger(indio_dev);
iio_buffer_unregister(indio_dev);
adis16201_unconfigure_ring(indio_dev);
adis_cleanup_buffer_and_trigger(st, indio_dev);
iio_device_free(indio_dev);
return 0;

136
drivers/staging/iio/accel/adis16201_ring.c
View File

@ -1,136 +0,0 @@
#include <linux/export.h>
#include <linux/interrupt.h>
#include <linux/mutex.h>
#include <linux/kernel.h>
#include <linux/spi/spi.h>
#include <linux/slab.h>
#include <linux/iio/iio.h>
#include "../ring_sw.h"
#include <linux/iio/trigger_consumer.h>
#include "adis16201.h"
/**
* adis16201_read_ring_data() read data registers which will be placed into ring
* @dev: device associated with child of actual device (iio_dev or iio_trig)
* @rx: somewhere to pass back the value read
**/
static int adis16201_read_ring_data(struct iio_dev *indio_dev, u8 *rx)
{
struct spi_message msg;
struct adis16201_state *st = iio_priv(indio_dev);
struct spi_transfer xfers[ADIS16201_OUTPUTS + 1];
int ret;
int i;
mutex_lock(&st->buf_lock);
spi_message_init(&msg);
memset(xfers, 0, sizeof(xfers));
for (i = 0; i <= ADIS16201_OUTPUTS; i++) {
xfers[i].bits_per_word = 8;
xfers[i].cs_change = 1;
xfers[i].len = 2;
xfers[i].delay_usecs = 20;
if (i < ADIS16201_OUTPUTS) {
xfers[i].tx_buf = st->tx + 2 * i;
st->tx[2 * i] = ADIS16201_READ_REG(ADIS16201_SUPPLY_OUT +
2 * i);
st->tx[2 * i + 1] = 0;
}
if (i >= 1)
xfers[i].rx_buf = rx + 2 * (i - 1);
spi_message_add_tail(&xfers[i], &msg);
}
ret = spi_sync(st->us, &msg);
if (ret)
dev_err(&st->us->dev, "problem when burst reading");
mutex_unlock(&st->buf_lock);
return ret;
}
/* Whilst this makes a lot of calls to iio_sw_ring functions - it is to device
* specific to be rolled into the core.
*/
static irqreturn_t adis16201_trigger_handler(int irq, void *p)
{
struct iio_poll_func *pf = p;
struct iio_dev *indio_dev = pf->indio_dev;
struct adis16201_state *st = iio_priv(indio_dev);
int i = 0;
s16 *data;
data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
if (data == NULL) {
dev_err(&st->us->dev, "memory alloc failed in ring bh");
goto done;
}
if (!bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength)
&& adis16201_read_ring_data(indio_dev, st->rx) >= 0)
for (; i < bitmap_weight(indio_dev->active_scan_mask,
indio_dev->masklength); i++)
data[i] = be16_to_cpup((__be16 *)&(st->rx[i*2]));
/* Guaranteed to be aligned with 8 byte boundary */
if (indio_dev->scan_timestamp)
*((s64 *)(data + ((i + 3)/4)*4)) = pf->timestamp;
iio_push_to_buffers(indio_dev, (u8 *)data);
kfree(data);
done:
iio_trigger_notify_done(indio_dev->trig);
return IRQ_HANDLED;
}
void adis16201_unconfigure_ring(struct iio_dev *indio_dev)
{
iio_dealloc_pollfunc(indio_dev->pollfunc);
iio_sw_rb_free(indio_dev->buffer);
}
static const struct iio_buffer_setup_ops adis16201_ring_setup_ops = {
.preenable = &iio_sw_buffer_preenable,
.postenable = &iio_triggered_buffer_postenable,
.predisable = &iio_triggered_buffer_predisable,
};
int adis16201_configure_ring(struct iio_dev *indio_dev)
{
int ret = 0;
struct iio_buffer *ring;
ring = iio_sw_rb_allocate(indio_dev);
if (!ring) {
ret = -ENOMEM;
return ret;
}
indio_dev->buffer = ring;
ring->scan_timestamp = true;
indio_dev->setup_ops = &adis16201_ring_setup_ops;
indio_dev->pollfunc = iio_alloc_pollfunc(&iio_pollfunc_store_time,
&adis16201_trigger_handler,
IRQF_ONESHOT,
indio_dev,
"adis16201_consumer%d",
indio_dev->id);
if (indio_dev->pollfunc == NULL) {
ret = -ENOMEM;
goto error_iio_sw_rb_free;
}
indio_dev->modes |= INDIO_BUFFER_TRIGGERED;
return 0;
error_iio_sw_rb_free:
iio_sw_rb_free(indio_dev->buffer);
return ret;
}

71
drivers/staging/iio/accel/adis16201_trigger.c
View File

@ -1,71 +0,0 @@
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/spi/spi.h>
#include <linux/export.h>
#include <linux/iio/iio.h>
#include <linux/iio/trigger.h>
#include "adis16201.h"
/**
* adis16201_data_rdy_trigger_set_state() set datardy interrupt state
**/
static int adis16201_data_rdy_trigger_set_state(struct iio_trigger *trig,
bool state)
{
struct iio_dev *indio_dev = trig->private_data;
dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
return adis16201_set_irq(indio_dev, state);
}
static const struct iio_trigger_ops adis16201_trigger_ops = {
.owner = THIS_MODULE,
.set_trigger_state = &adis16201_data_rdy_trigger_set_state,
};
int adis16201_probe_trigger(struct iio_dev *indio_dev)
{
int ret;
struct adis16201_state *st = iio_priv(indio_dev);
st->trig = iio_trigger_alloc("adis16201-dev%d", indio_dev->id);
if (st->trig == NULL) {
ret = -ENOMEM;
goto error_ret;
}
ret = request_irq(st->us->irq,
&iio_trigger_generic_data_rdy_poll,
IRQF_TRIGGER_RISING,
"adis16201",
st->trig);
if (ret)
goto error_free_trig;
st->trig->dev.parent = &st->us->dev;
st->trig->ops = &adis16201_trigger_ops;
st->trig->private_data = indio_dev;
ret = iio_trigger_register(st->trig);
/* select default trigger */
indio_dev->trig = st->trig;
if (ret)
goto error_free_irq;
return 0;
error_free_irq:
free_irq(st->us->irq, st->trig);
error_free_trig:
iio_trigger_free(st->trig);
error_ret:
return ret;
}
void adis16201_remove_trigger(struct iio_dev *indio_dev)
{
struct adis16201_state *state = iio_priv(indio_dev);
iio_trigger_unregister(state->trig);
free_irq(state->us->irq, state->trig);
iio_trigger_free(state->trig);
}