diff options
Diffstat (limited to 'drivers/staging/iio/accel/adis16203_core.c')
-rw-r--r-- | drivers/staging/iio/accel/adis16203_core.c | 411 |
1 files changed, 194 insertions, 217 deletions
diff --git a/drivers/staging/iio/accel/adis16203_core.c b/drivers/staging/iio/accel/adis16203_core.c index b57f19087a93..36be4d5dc614 100644 --- a/drivers/staging/iio/accel/adis16203_core.c +++ b/drivers/staging/iio/accel/adis16203_core.c @@ -6,9 +6,6 @@ * Licensed under the GPL-2 or later. */ -#include <linux/interrupt.h> -#include <linux/irq.h> -#include <linux/gpio.h> #include <linux/delay.h> #include <linux/mutex.h> #include <linux/device.h> @@ -16,33 +13,29 @@ #include <linux/spi/spi.h> #include <linux/slab.h> #include <linux/sysfs.h> -#include <linux/list.h> #include "../iio.h" #include "../sysfs.h" #include "accel.h" #include "inclinometer.h" -#include "../gyro/gyro.h" +#include "../ring_generic.h" #include "../adc/adc.h" #include "adis16203.h" #define DRIVER_NAME "adis16203" -static int adis16203_check_status(struct device *dev); - /** * adis16203_spi_write_reg_8() - write single byte to a register - * @dev: device associated with child of actual device (iio_dev or iio_trig) + * @indio_dev: iio device associated with child of actual device * @reg_address: the address of the register to be written * @val: the value to write **/ -static int adis16203_spi_write_reg_8(struct device *dev, - u8 reg_address, - u8 val) +static int adis16203_spi_write_reg_8(struct iio_dev *indio_dev, + u8 reg_address, + u8 val) { int ret; - struct iio_dev *indio_dev = dev_get_drvdata(dev); struct adis16203_state *st = iio_dev_get_devdata(indio_dev); mutex_lock(&st->buf_lock); @@ -57,18 +50,17 @@ static int adis16203_spi_write_reg_8(struct device *dev, /** * adis16203_spi_write_reg_16() - write 2 bytes to a pair of registers - * @dev: device associated with child of actual device (iio_dev or iio_trig) + * @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 adis16203_spi_write_reg_16(struct device *dev, - u8 lower_reg_address, - u16 value) +static int adis16203_spi_write_reg_16(struct iio_dev *indio_dev, + u8 lower_reg_address, + u16 value) { int ret; struct spi_message msg; - struct iio_dev *indio_dev = dev_get_drvdata(dev); struct adis16203_state *st = iio_dev_get_devdata(indio_dev); struct spi_transfer xfers[] = { { @@ -80,7 +72,6 @@ static int adis16203_spi_write_reg_16(struct device *dev, .tx_buf = st->tx + 2, .bits_per_word = 8, .len = 2, - .cs_change = 1, }, }; @@ -101,17 +92,16 @@ static int adis16203_spi_write_reg_16(struct device *dev, /** * adis16203_spi_read_reg_16() - read 2 bytes from a 16-bit register - * @dev: device associated with child of actual device (iio_dev or iio_trig) + * @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 adis16203_spi_read_reg_16(struct device *dev, +static int adis16203_spi_read_reg_16(struct iio_dev *indio_dev, u8 lower_reg_address, u16 *val) { struct spi_message msg; - struct iio_dev *indio_dev = dev_get_drvdata(dev); struct adis16203_state *st = iio_dev_get_devdata(indio_dev); int ret; struct spi_transfer xfers[] = { @@ -125,7 +115,6 @@ static int adis16203_spi_read_reg_16(struct device *dev, .rx_buf = st->rx, .bits_per_word = 8, .len = 2, - .cs_change = 1, .delay_usecs = 20, }, }; @@ -150,101 +139,43 @@ error_ret: return ret; } -static ssize_t adis16203_read_12bit_unsigned(struct device *dev, - struct device_attribute *attr, - char *buf) +static int adis16203_check_status(struct iio_dev *indio_dev) { + u16 status; int ret; - u16 val = 0; - struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); - - ret = adis16203_spi_read_reg_16(dev, this_attr->address, &val); - if (ret) - return ret; - - if (val & ADIS16203_ERROR_ACTIVE) - adis16203_check_status(dev); - - return sprintf(buf, "%u\n", val & 0x0FFF); -} -static ssize_t adis16203_read_temp(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *indio_dev = dev_get_drvdata(dev); - ssize_t ret; - u16 val; - - /* Take the iio_dev status lock */ - mutex_lock(&indio_dev->mlock); - - ret = adis16203_spi_read_reg_16(dev, ADIS16203_TEMP_OUT, (u16 *)&val); - if (ret) + ret = adis16203_spi_read_reg_16(indio_dev, + ADIS16203_DIAG_STAT, + &status); + if (ret < 0) { + dev_err(&indio_dev->dev, "Reading status failed\n"); goto error_ret; - - if (val & ADIS16203_ERROR_ACTIVE) - adis16203_check_status(dev); - - val &= 0xFFF; - ret = sprintf(buf, "%d\n", val); - -error_ret: - mutex_unlock(&indio_dev->mlock); - return ret; -} - -static ssize_t adis16203_read_14bit_signed(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *indio_dev = dev_get_drvdata(dev); - struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); - s16 val = 0; - ssize_t ret; - - mutex_lock(&indio_dev->mlock); - - ret = adis16203_spi_read_reg_16(dev, this_attr->address, (u16 *)&val); - if (!ret) { - if (val & ADIS16203_ERROR_ACTIVE) - adis16203_check_status(dev); - - val = ((s16)(val << 2) >> 2); - ret = sprintf(buf, "%d\n", val); } + ret = status & 0x1F; - mutex_unlock(&indio_dev->mlock); - - return ret; -} - -static ssize_t adis16203_write_16bit(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); - int ret; - long val; - - ret = strict_strtol(buf, 10, &val); - if (ret) - goto error_ret; - ret = adis16203_spi_write_reg_16(dev, this_attr->address, val); + if (status & ADIS16203_DIAG_STAT_SELFTEST_FAIL) + dev_err(&indio_dev->dev, "Self test failure\n"); + if (status & ADIS16203_DIAG_STAT_SPI_FAIL) + dev_err(&indio_dev->dev, "SPI failure\n"); + if (status & ADIS16203_DIAG_STAT_FLASH_UPT) + dev_err(&indio_dev->dev, "Flash update failed\n"); + if (status & ADIS16203_DIAG_STAT_POWER_HIGH) + dev_err(&indio_dev->dev, "Power supply above 3.625V\n"); + if (status & ADIS16203_DIAG_STAT_POWER_LOW) + dev_err(&indio_dev->dev, "Power supply below 3.15V\n"); error_ret: - return ret ? ret : len; + return ret; } -static int adis16203_reset(struct device *dev) +static int adis16203_reset(struct iio_dev *indio_dev) { int ret; - ret = adis16203_spi_write_reg_8(dev, + ret = adis16203_spi_write_reg_8(indio_dev, ADIS16203_GLOB_CMD, ADIS16203_GLOB_CMD_SW_RESET); if (ret) - dev_err(dev, "problem resetting device"); + dev_err(&indio_dev->dev, "problem resetting device"); return ret; } @@ -253,23 +184,24 @@ static ssize_t adis16203_write_reset(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { + struct iio_dev *indio_dev = dev_get_drvdata(dev); if (len < 1) return -EINVAL; switch (buf[0]) { case '1': case 'y': case 'Y': - return adis16203_reset(dev); + return adis16203_reset(indio_dev); } return -EINVAL; } -int adis16203_set_irq(struct device *dev, bool enable) +int adis16203_set_irq(struct iio_dev *indio_dev, bool enable) { int ret = 0; u16 msc; - ret = adis16203_spi_read_reg_16(dev, ADIS16203_MSC_CTRL, &msc); + ret = adis16203_spi_read_reg_16(indio_dev, ADIS16203_MSC_CTRL, &msc); if (ret) goto error_ret; @@ -280,142 +212,195 @@ int adis16203_set_irq(struct device *dev, bool enable) else msc &= ~ADIS16203_MSC_CTRL_DATA_RDY_EN; - ret = adis16203_spi_write_reg_16(dev, ADIS16203_MSC_CTRL, msc); + ret = adis16203_spi_write_reg_16(indio_dev, ADIS16203_MSC_CTRL, msc); error_ret: return ret; } -static int adis16203_check_status(struct device *dev) +static int adis16203_self_test(struct iio_dev *indio_dev) { - u16 status; int ret; - - ret = adis16203_spi_read_reg_16(dev, ADIS16203_DIAG_STAT, &status); - if (ret < 0) { - dev_err(dev, "Reading status failed\n"); - goto error_ret; - } - ret = status & 0x1F; - - if (status & ADIS16203_DIAG_STAT_SELFTEST_FAIL) - dev_err(dev, "Self test failure\n"); - if (status & ADIS16203_DIAG_STAT_SPI_FAIL) - dev_err(dev, "SPI failure\n"); - if (status & ADIS16203_DIAG_STAT_FLASH_UPT) - dev_err(dev, "Flash update failed\n"); - if (status & ADIS16203_DIAG_STAT_POWER_HIGH) - dev_err(dev, "Power supply above 3.625V\n"); - if (status & ADIS16203_DIAG_STAT_POWER_LOW) - dev_err(dev, "Power supply below 3.15V\n"); - -error_ret: - return ret; -} - -static int adis16203_self_test(struct device *dev) -{ - int ret; - ret = adis16203_spi_write_reg_16(dev, + ret = adis16203_spi_write_reg_16(indio_dev, ADIS16203_MSC_CTRL, ADIS16203_MSC_CTRL_SELF_TEST_EN); if (ret) { - dev_err(dev, "problem starting self test"); + dev_err(&indio_dev->dev, "problem starting self test"); goto err_ret; } - adis16203_check_status(dev); + adis16203_check_status(indio_dev); err_ret: return ret; } -static int adis16203_initial_setup(struct adis16203_state *st) +static int adis16203_initial_setup(struct iio_dev *indio_dev) { int ret; - struct device *dev = &st->indio_dev->dev; /* Disable IRQ */ - ret = adis16203_set_irq(dev, false); + ret = adis16203_set_irq(indio_dev, false); if (ret) { - dev_err(dev, "disable irq failed"); + dev_err(&indio_dev->dev, "disable irq failed"); goto err_ret; } /* Do self test */ - ret = adis16203_self_test(dev); + ret = adis16203_self_test(indio_dev); if (ret) { - dev_err(dev, "self test failure"); + dev_err(&indio_dev->dev, "self test failure"); goto err_ret; } /* Read status register to check the result */ - ret = adis16203_check_status(dev); + ret = adis16203_check_status(indio_dev); if (ret) { - adis16203_reset(dev); - dev_err(dev, "device not playing ball -> reset"); + adis16203_reset(indio_dev); + dev_err(&indio_dev->dev, "device not playing ball -> reset"); msleep(ADIS16203_STARTUP_DELAY); - ret = adis16203_check_status(dev); + ret = adis16203_check_status(indio_dev); if (ret) { - dev_err(dev, "giving up"); + dev_err(&indio_dev->dev, "giving up"); goto err_ret; } } - printk(KERN_INFO DRIVER_NAME ": at CS%d (irq %d)\n", - st->us->chip_select, st->us->irq); - err_ret: return ret; } -static IIO_DEV_ATTR_IN_NAMED_RAW(0, supply, adis16203_read_12bit_unsigned, - ADIS16203_SUPPLY_OUT); -static IIO_CONST_ATTR(in0_supply_scale, "0.00122"); -static IIO_DEV_ATTR_IN_RAW(1, adis16203_read_12bit_unsigned, - ADIS16203_AUX_ADC); -static IIO_CONST_ATTR(in1_scale, "0.00061"); - -static IIO_DEV_ATTR_INCLI_X(adis16203_read_14bit_signed, - ADIS16203_XINCL_OUT); -static IIO_DEV_ATTR_INCLI_Y(adis16203_read_14bit_signed, - ADIS16203_YINCL_OUT); -static IIO_DEV_ATTR_INCLI_X_OFFSET(S_IWUSR | S_IRUGO, - adis16203_read_14bit_signed, - adis16203_write_16bit, - ADIS16203_INCL_NULL); -static IIO_CONST_ATTR(incli_scale, "0.025"); - -static IIO_DEV_ATTR_TEMP_RAW(adis16203_read_temp); -static IIO_CONST_ATTR(temp_offset, "25"); -static IIO_CONST_ATTR(temp_scale, "-0.47"); +enum adis16203_chan { + in_supply, + in_aux, + incli_x, + incli_y, + temp, +}; + +static u8 adis16203_addresses[5][2] = { + [in_supply] = { ADIS16203_SUPPLY_OUT }, + [in_aux] = { ADIS16203_AUX_ADC }, + [incli_x] = { ADIS16203_XINCL_OUT, ADIS16203_INCL_NULL}, + [incli_y] = { ADIS16203_YINCL_OUT }, + [temp] = { ADIS16203_TEMP_OUT } +}; -static IIO_DEVICE_ATTR(reset, S_IWUSR, NULL, adis16203_write_reset, 0); +static int adis16203_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) +{ + /* currently only one writable parameter which keeps this simple */ + u8 addr = adis16203_addresses[chan->address][1]; + return adis16203_spi_write_reg_16(indio_dev, addr, val & 0x3FFF); +} -static IIO_CONST_ATTR(name, "adis16203"); +static int adis16203_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, + long mask) +{ + int ret; + int bits; + u8 addr; + s16 val16; + switch (mask) { + case 0: + mutex_lock(&indio_dev->mlock); + addr = adis16203_addresses[chan->address][0]; + ret = adis16203_spi_read_reg_16(indio_dev, addr, &val16); + if (ret) + return ret; -static struct attribute *adis16203_event_attributes[] = { - NULL -}; + if (val16 & ADIS16203_ERROR_ACTIVE) { + ret = adis16203_check_status(indio_dev); + if (ret) + 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; + case (1 << IIO_CHAN_INFO_SCALE_SEPARATE): + case (1 << IIO_CHAN_INFO_SCALE_SHARED): + switch (chan->type) { + case IIO_IN: + *val = 0; + if (chan->channel == 0) + *val2 = 1220; + else + *val2 = 610; + return IIO_VAL_INT_PLUS_MICRO; + case IIO_TEMP: + *val = 0; + *val2 = -470000; + return IIO_VAL_INT_PLUS_MICRO; + case IIO_INCLI: + *val = 0; + *val2 = 25000; + return IIO_VAL_INT_PLUS_MICRO; + default: + return -EINVAL; + } + case (1 << IIO_CHAN_INFO_OFFSET_SEPARATE): + *val = 25; + return IIO_VAL_INT; + case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE): + bits = 14; + mutex_lock(&indio_dev->mlock); + addr = adis16203_addresses[chan->address][1]; + ret = adis16203_spi_read_reg_16(indio_dev, addr, &val16); + if (ret) { + mutex_unlock(&indio_dev->mlock); + return ret; + } + val16 &= (1 << bits) - 1; + val16 = (s16)(val16 << (16 - bits)) >> (16 - bits); + *val = val16; + mutex_unlock(&indio_dev->mlock); + return IIO_VAL_INT; + default: + return -EINVAL; + } +} -static struct attribute_group adis16203_event_attribute_group = { - .attrs = adis16203_event_attributes, +static struct iio_chan_spec adis16203_channels[] = { + IIO_CHAN(IIO_IN, 0, 1, 0, "supply", 0, 0, + (1 << IIO_CHAN_INFO_SCALE_SEPARATE), + in_supply, ADIS16203_SCAN_SUPPLY, + IIO_ST('u', 12, 16, 0), 0), + IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0, + (1 << IIO_CHAN_INFO_SCALE_SEPARATE), + in_aux, ADIS16203_SCAN_AUX_ADC, + IIO_ST('u', 12, 16, 0), 0), + IIO_CHAN(IIO_INCLI, 1, 0, 0, NULL, 0, IIO_MOD_X, + (1 << IIO_CHAN_INFO_SCALE_SHARED) | + (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE), + incli_x, ADIS16203_SCAN_INCLI_X, + IIO_ST('s', 14, 16, 0), 0), + /* Fixme: Not what it appears to be - see data sheet */ + IIO_CHAN(IIO_INCLI, 1, 0, 0, NULL, 0, IIO_MOD_Y, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + incli_y, ADIS16203_SCAN_INCLI_Y, + IIO_ST('s', 14, 16, 0), 0), + IIO_CHAN(IIO_TEMP, 0, 1, 0, NULL, 0, 0, + (1 << IIO_CHAN_INFO_SCALE_SEPARATE) | + (1 << IIO_CHAN_INFO_OFFSET_SEPARATE), + temp, ADIS16203_SCAN_TEMP, + IIO_ST('u', 12, 16, 0), 0), + IIO_CHAN_SOFT_TIMESTAMP(5), }; +static IIO_DEVICE_ATTR(reset, S_IWUSR, NULL, adis16203_write_reset, 0); + static struct attribute *adis16203_attributes[] = { - &iio_dev_attr_in0_supply_raw.dev_attr.attr, - &iio_const_attr_in0_supply_scale.dev_attr.attr, - &iio_dev_attr_temp_raw.dev_attr.attr, - &iio_const_attr_temp_offset.dev_attr.attr, - &iio_const_attr_temp_scale.dev_attr.attr, &iio_dev_attr_reset.dev_attr.attr, - &iio_const_attr_name.dev_attr.attr, - &iio_dev_attr_in1_raw.dev_attr.attr, - &iio_const_attr_in1_scale.dev_attr.attr, - &iio_dev_attr_incli_x_raw.dev_attr.attr, - &iio_dev_attr_incli_y_raw.dev_attr.attr, - &iio_dev_attr_incli_x_offset.dev_attr.attr, - &iio_const_attr_incli_scale.dev_attr.attr, NULL }; @@ -423,6 +408,13 @@ static const struct attribute_group adis16203_attribute_group = { .attrs = adis16203_attributes, }; +static const struct iio_info adis16203_info = { + .attrs = &adis16203_attribute_group, + .read_raw = &adis16203_read_raw, + .write_raw = &adis16203_write_raw, + .driver_module = THIS_MODULE, +}; + static int __devinit adis16203_probe(struct spi_device *spi) { int ret, regdone = 0; @@ -448,18 +440,17 @@ static int __devinit adis16203_probe(struct spi_device *spi) st->us = spi; mutex_init(&st->buf_lock); /* setup the industrialio driver allocated elements */ - st->indio_dev = iio_allocate_device(); + st->indio_dev = iio_allocate_device(0); if (st->indio_dev == NULL) { ret = -ENOMEM; goto error_free_tx; } - + st->indio_dev->name = spi->dev.driver->name; st->indio_dev->dev.parent = &spi->dev; - st->indio_dev->num_interrupt_lines = 1; - st->indio_dev->event_attrs = &adis16203_event_attribute_group; - st->indio_dev->attrs = &adis16203_attribute_group; + st->indio_dev->channels = adis16203_channels; + st->indio_dev->num_channels = ARRAY_SIZE(adis16203_channels); + st->indio_dev->info = &adis16203_info; st->indio_dev->dev_data = (void *)(st); - st->indio_dev->driver_module = THIS_MODULE; st->indio_dev->modes = INDIO_DIRECT_MODE; ret = adis16203_configure_ring(st->indio_dev); @@ -471,39 +462,30 @@ static int __devinit adis16203_probe(struct spi_device *spi) goto error_unreg_ring_funcs; regdone = 1; - ret = adis16203_initialize_ring(st->indio_dev->ring); + ret = iio_ring_buffer_register_ex(st->indio_dev->ring, 0, + adis16203_channels, + ARRAY_SIZE(adis16203_channels)); if (ret) { printk(KERN_ERR "failed to initialize the ring\n"); goto error_unreg_ring_funcs; } if (spi->irq) { - ret = iio_register_interrupt_line(spi->irq, - st->indio_dev, - 0, - IRQF_TRIGGER_RISING, - "adis16203"); - if (ret) - goto error_uninitialize_ring; - ret = adis16203_probe_trigger(st->indio_dev); if (ret) - goto error_unregister_line; + goto error_uninitialize_ring; } /* Get the device into a sane initial state */ - ret = adis16203_initial_setup(st); + ret = adis16203_initial_setup(st->indio_dev); if (ret) goto error_remove_trigger; return 0; error_remove_trigger: adis16203_remove_trigger(st->indio_dev); -error_unregister_line: - if (spi->irq) - iio_unregister_interrupt_line(st->indio_dev, 0); error_uninitialize_ring: - adis16203_uninitialize_ring(st->indio_dev->ring); + iio_ring_buffer_unregister(st->indio_dev->ring); error_unreg_ring_funcs: adis16203_unconfigure_ring(st->indio_dev); error_free_dev: @@ -526,13 +508,8 @@ static int adis16203_remove(struct spi_device *spi) struct adis16203_state *st = spi_get_drvdata(spi); struct iio_dev *indio_dev = st->indio_dev; - flush_scheduled_work(); - adis16203_remove_trigger(indio_dev); - if (spi->irq) - iio_unregister_interrupt_line(indio_dev, 0); - - adis16203_uninitialize_ring(indio_dev->ring); + iio_ring_buffer_unregister(indio_dev->ring); iio_device_unregister(indio_dev); adis16203_unconfigure_ring(indio_dev); kfree(st->tx); |