diff options
author | Jonathan Cameron <jic23@cam.ac.uk> | 2011-05-18 13:41:49 (GMT) |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-05-19 23:14:55 (GMT) |
commit | a34c26dcd48a0c6e03ea175e152e787414861aa2 (patch) | |
tree | cd0787e70c059b208e9424ea0d5bad84ed92f028 /drivers/staging/iio/accel/adis16209_core.c | |
parent | ad3eb9ab1276cc69bb9cc72dffc074d1a317a6c0 (diff) | |
download | linux-a34c26dcd48a0c6e03ea175e152e787414861aa2.tar.xz |
staging:iio:accel:adis16209 move to chan_spec based setup.
For clean drivers its easier to convert to chan_spec based
registration than to work around the scan_el attributes
going away.
Some minor cleanups done whilst here.
Untested.
V2: IIO_CHAN macro used.
Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/iio/accel/adis16209_core.c')
-rw-r--r-- | drivers/staging/iio/accel/adis16209_core.c | 434 |
1 files changed, 222 insertions, 212 deletions
diff --git a/drivers/staging/iio/accel/adis16209_core.c b/drivers/staging/iio/accel/adis16209_core.c index fa0a3ad..d48babe 100644 --- a/drivers/staging/iio/accel/adis16209_core.c +++ b/drivers/staging/iio/accel/adis16209_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> @@ -23,27 +20,23 @@ #include "../ring_generic.h" #include "accel.h" #include "inclinometer.h" -#include "../gyro/gyro.h" #include "../adc/adc.h" #include "adis16209.h" #define DRIVER_NAME "adis16209" -static int adis16209_check_status(struct device *dev); - /** * adis16209_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 actual device * @reg_address: the address of the register to be written * @val: the value to write **/ -static int adis16209_spi_write_reg_8(struct device *dev, - u8 reg_address, - u8 val) +static int adis16209_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 adis16209_state *st = iio_dev_get_devdata(indio_dev); mutex_lock(&st->buf_lock); @@ -58,18 +51,17 @@ static int adis16209_spi_write_reg_8(struct device *dev, /** * adis16209_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 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 adis16209_spi_write_reg_16(struct device *dev, - u8 lower_reg_address, - u16 value) +static int adis16209_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 adis16209_state *st = iio_dev_get_devdata(indio_dev); struct spi_transfer xfers[] = { { @@ -82,7 +74,6 @@ static int adis16209_spi_write_reg_16(struct device *dev, .tx_buf = st->tx + 2, .bits_per_word = 8, .len = 2, - .cs_change = 1, .delay_usecs = 30, }, }; @@ -104,17 +95,16 @@ static int adis16209_spi_write_reg_16(struct device *dev, /** * adis16209_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 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 adis16209_spi_read_reg_16(struct device *dev, - u8 lower_reg_address, - u16 *val) +static int adis16209_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 adis16209_state *st = iio_dev_get_devdata(indio_dev); int ret; struct spi_transfer xfers[] = { @@ -128,7 +118,6 @@ static int adis16209_spi_read_reg_16(struct device *dev, .rx_buf = st->rx, .bits_per_word = 8, .len = 2, - .cs_change = 1, .delay_usecs = 30, }, }; @@ -154,119 +143,14 @@ error_ret: return ret; } -static ssize_t adis16209_read_12bit_unsigned(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - int ret; - u16 val = 0; - struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); - - ret = adis16209_spi_read_reg_16(dev, this_attr->address, &val); - if (ret) - return ret; - - if (val & ADIS16209_ERROR_ACTIVE) - adis16209_check_status(dev); - - return sprintf(buf, "%u\n", val & 0x0FFF); -} - -static ssize_t adis16209_read_14bit_unsigned(struct device *dev, - struct device_attribute *attr, - char *buf) +static int adis16209_reset(struct iio_dev *indio_dev) { int ret; - u16 val = 0; - struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); - - ret = adis16209_spi_read_reg_16(dev, this_attr->address, &val); - if (ret) - return ret; - - if (val & ADIS16209_ERROR_ACTIVE) - adis16209_check_status(dev); - - return sprintf(buf, "%u\n", val & 0x3FFF); -} - -static ssize_t adis16209_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 = adis16209_spi_read_reg_16(dev, ADIS16209_TEMP_OUT, (u16 *)&val); - if (ret) - goto error_ret; - - if (val & ADIS16209_ERROR_ACTIVE) - adis16209_check_status(dev); - - val &= 0xFFF; - ret = sprintf(buf, "%d\n", val); - -error_ret: - mutex_unlock(&indio_dev->mlock); - return ret; -} - -static ssize_t adis16209_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 = adis16209_spi_read_reg_16(dev, this_attr->address, (u16 *)&val); - if (!ret) { - if (val & ADIS16209_ERROR_ACTIVE) - adis16209_check_status(dev); - - val = ((s16)(val << 2) >> 2); - ret = sprintf(buf, "%d\n", val); - } - - mutex_unlock(&indio_dev->mlock); - - return ret; -} - -static ssize_t adis16209_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 = adis16209_spi_write_reg_16(dev, this_attr->address, val); - -error_ret: - return ret ? ret : len; -} - -static int adis16209_reset(struct device *dev) -{ - int ret; - ret = adis16209_spi_write_reg_8(dev, + ret = adis16209_spi_write_reg_8(indio_dev, ADIS16209_GLOB_CMD, ADIS16209_GLOB_CMD_SW_RESET); if (ret) - dev_err(dev, "problem resetting device"); + dev_err(&indio_dev->dev, "problem resetting device"); return ret; } @@ -275,23 +159,25 @@ static ssize_t adis16209_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 adis16209_reset(dev); + return adis16209_reset(indio_dev); } return -EINVAL; } -int adis16209_set_irq(struct device *dev, bool enable) +int adis16209_set_irq(struct iio_dev *indio_dev, bool enable) { int ret = 0; u16 msc; - ret = adis16209_spi_read_reg_16(dev, ADIS16209_MSC_CTRL, &msc); + ret = adis16209_spi_read_reg_16(indio_dev, ADIS16209_MSC_CTRL, &msc); if (ret) goto error_ret; @@ -302,149 +188,267 @@ int adis16209_set_irq(struct device *dev, bool enable) else msc &= ~ADIS16209_MSC_CTRL_DATA_RDY_EN; - ret = adis16209_spi_write_reg_16(dev, ADIS16209_MSC_CTRL, msc); + ret = adis16209_spi_write_reg_16(indio_dev, ADIS16209_MSC_CTRL, msc); error_ret: return ret; } -static int adis16209_check_status(struct device *dev) +static int adis16209_check_status(struct iio_dev *indio_dev) { u16 status; int ret; - ret = adis16209_spi_read_reg_16(dev, ADIS16209_DIAG_STAT, &status); + ret = adis16209_spi_read_reg_16(indio_dev, + ADIS16209_DIAG_STAT, &status); if (ret < 0) { - dev_err(dev, "Reading status failed\n"); + dev_err(&indio_dev->dev, "Reading status failed\n"); goto error_ret; } ret = status & 0x1F; if (status & ADIS16209_DIAG_STAT_SELFTEST_FAIL) - dev_err(dev, "Self test failure\n"); + dev_err(&indio_dev->dev, "Self test failure\n"); if (status & ADIS16209_DIAG_STAT_SPI_FAIL) - dev_err(dev, "SPI failure\n"); + dev_err(&indio_dev->dev, "SPI failure\n"); if (status & ADIS16209_DIAG_STAT_FLASH_UPT) - dev_err(dev, "Flash update failed\n"); + dev_err(&indio_dev->dev, "Flash update failed\n"); if (status & ADIS16209_DIAG_STAT_POWER_HIGH) - dev_err(dev, "Power supply above 3.625V\n"); + dev_err(&indio_dev->dev, "Power supply above 3.625V\n"); if (status & ADIS16209_DIAG_STAT_POWER_LOW) - dev_err(dev, "Power supply below 3.15V\n"); + dev_err(&indio_dev->dev, "Power supply below 3.15V\n"); error_ret: return ret; } -static int adis16209_self_test(struct device *dev) +static int adis16209_self_test(struct iio_dev *indio_dev) { int ret; - ret = adis16209_spi_write_reg_16(dev, + ret = adis16209_spi_write_reg_16(indio_dev, ADIS16209_MSC_CTRL, ADIS16209_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; } - adis16209_check_status(dev); + adis16209_check_status(indio_dev); err_ret: return ret; } -static int adis16209_initial_setup(struct adis16209_state *st) +static int adis16209_initial_setup(struct iio_dev *indio_dev) { int ret; - struct device *dev = &st->indio_dev->dev; /* Disable IRQ */ - ret = adis16209_set_irq(dev, false); + ret = adis16209_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 = adis16209_self_test(dev); + ret = adis16209_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 = adis16209_check_status(dev); + ret = adis16209_check_status(indio_dev); if (ret) { - adis16209_reset(dev); - dev_err(dev, "device not playing ball -> reset"); + adis16209_reset(indio_dev); + dev_err(&indio_dev->dev, "device not playing ball -> reset"); msleep(ADIS16209_STARTUP_DELAY); - ret = adis16209_check_status(dev); + ret = adis16209_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, adis16209_read_14bit_unsigned, - ADIS16209_SUPPLY_OUT); -static IIO_CONST_ATTR_IN_NAMED_SCALE(0, supply, "0.30518"); -static IIO_DEV_ATTR_IN_RAW(1, adis16209_read_12bit_unsigned, - ADIS16209_AUX_ADC); -static IIO_CONST_ATTR(in1_scale, "0.6105"); - -static IIO_DEV_ATTR_ACCEL_X(adis16209_read_14bit_signed, - ADIS16209_XACCL_OUT); -static IIO_DEV_ATTR_ACCEL_Y(adis16209_read_14bit_signed, - ADIS16209_YACCL_OUT); -static IIO_DEV_ATTR_ACCEL_X_CALIBBIAS(S_IWUSR | S_IRUGO, - adis16209_read_14bit_signed, - adis16209_write_16bit, - ADIS16209_XACCL_NULL); -static IIO_DEV_ATTR_ACCEL_Y_CALIBBIAS(S_IWUSR | S_IRUGO, - adis16209_read_14bit_signed, - adis16209_write_16bit, - ADIS16209_YACCL_NULL); -static IIO_CONST_ATTR_ACCEL_SCALE("0.002394195531"); - -static IIO_DEV_ATTR_INCLI_X(adis16209_read_14bit_signed, - ADIS16209_XINCL_OUT); -static IIO_DEV_ATTR_INCLI_Y(adis16209_read_14bit_signed, - ADIS16209_YINCL_OUT); -static IIO_CONST_ATTR(incli_scale, "0.00043633231"); - -static IIO_DEVICE_ATTR(rot_raw, S_IRUGO, adis16209_read_14bit_signed, - NULL, ADIS16209_ROT_OUT); - -static IIO_DEV_ATTR_TEMP_RAW(adis16209_read_temp); -static IIO_CONST_ATTR_TEMP_OFFSET("25"); -static IIO_CONST_ATTR_TEMP_SCALE("-0.47"); +enum adis16209_chan { + in_supply, + temp, + accel_x, + accel_y, + incli_x, + incli_y, + in_aux, + rot, +}; + +static const u8 adis16209_addresses[8][2] = { + [in_supply] = { ADIS16209_SUPPLY_OUT }, + [in_aux] = { ADIS16209_AUX_ADC }, + [accel_x] = { ADIS16209_XACCL_OUT, ADIS16209_XACCL_NULL }, + [accel_y] = { ADIS16209_YACCL_OUT, ADIS16209_YACCL_NULL }, + [incli_x] = { ADIS16209_XINCL_OUT, ADIS16209_XINCL_NULL }, + [incli_y] = { ADIS16209_YINCL_OUT, ADIS16209_YINCL_NULL }, + [rot] = { ADIS16209_ROT_OUT }, + [temp] = { ADIS16209_TEMP_OUT }, +}; + +static int adis16209_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, + int val2, + long mask) +{ + int bits; + s16 val16; + u8 addr; + switch (mask) { + case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE): + switch (chan->type) { + case IIO_ACCEL: + case IIO_INCLI: + bits = 14; + break; + default: + return -EINVAL; + }; + val16 = val & ((1 << bits) - 1); + addr = adis16209_addresses[chan->address][1]; + return adis16209_spi_write_reg_16(indio_dev, addr, val16); + } + return -EINVAL; +} + +static int adis16209_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 = adis16209_addresses[chan->address][0]; + ret = adis16209_spi_read_reg_16(indio_dev, addr, &val16); + if (ret) + return ret; + + if (val16 & ADIS16209_ERROR_ACTIVE) { + ret = adis16209_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 = 305180; + else + *val2 = 610500; + return IIO_VAL_INT_PLUS_MICRO; + case IIO_TEMP: + *val = 0; + *val2 = -470000; + return IIO_VAL_INT_PLUS_MICRO; + case IIO_ACCEL: + *val = 0; + *val2 = 2394; + return IIO_VAL_INT_PLUS_MICRO; + case IIO_INCLI: + *val = 0; + *val2 = 436; + return IIO_VAL_INT_PLUS_MICRO; + default: + return -EINVAL; + } + break; + case (1 << IIO_CHAN_INFO_OFFSET_SEPARATE): + *val = 25; + return IIO_VAL_INT; + case (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE): + switch (chan->type) { + case IIO_ACCEL: + bits = 14; + break; + default: + return -EINVAL; + }; + mutex_lock(&indio_dev->mlock); + addr = adis16209_addresses[chan->address][1]; + ret = adis16209_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; + } + return -EINVAL; +} + +static struct iio_chan_spec adis16209_channels[] = { + IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0, + (1 << IIO_CHAN_INFO_SCALE_SEPARATE), + in_supply, ADIS16209_SCAN_SUPPLY, + IIO_ST('u', 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, ADIS16209_SCAN_TEMP, + IIO_ST('u', 12, 16, 0), 0), + IIO_CHAN(IIO_ACCEL, 1, 0, 0, NULL, 0, IIO_MOD_X, + (1 << IIO_CHAN_INFO_SCALE_SHARED) | + (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE), + accel_x, ADIS16209_SCAN_ACC_X, + IIO_ST('s', 14, 16, 0), 0), + IIO_CHAN(IIO_ACCEL, 1, 0, 0, NULL, 0, IIO_MOD_Y, + (1 << IIO_CHAN_INFO_SCALE_SHARED) | + (1 << IIO_CHAN_INFO_CALIBBIAS_SEPARATE), + accel_y, ADIS16209_SCAN_ACC_Y, + IIO_ST('s', 14, 16, 0), 0), + IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0, + (1 << IIO_CHAN_INFO_SCALE_SEPARATE), + in_aux, ADIS16209_SCAN_AUX_ADC, + IIO_ST('u', 12, 16, 0), 0), + IIO_CHAN(IIO_INCLI, 0, 1, 0, NULL, 0, IIO_MOD_X, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + incli_x, ADIS16209_SCAN_INCLI_X, + IIO_ST('s', 14, 16, 0), 0), + IIO_CHAN(IIO_INCLI, 0, 1, 0, NULL, 0, IIO_MOD_Y, + (1 << IIO_CHAN_INFO_SCALE_SHARED), + incli_y, ADIS16209_SCAN_INCLI_Y, + IIO_ST('s', 14, 16, 0), 0), + IIO_CHAN(IIO_ROT, 0, 1, 0, NULL, 0, IIO_MOD_X, + 0, + rot, ADIS16209_SCAN_ROT, + IIO_ST('s', 14, 16, 0), 0), + IIO_CHAN_SOFT_TIMESTAMP(8) +}; static IIO_DEVICE_ATTR(reset, S_IWUSR, NULL, adis16209_write_reset, 0); static struct attribute *adis16209_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_dev_attr_in1_raw.dev_attr.attr, - &iio_const_attr_in1_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_x_calibbias.dev_attr.attr, - &iio_dev_attr_accel_y_calibbias.dev_attr.attr, - &iio_const_attr_accel_scale.dev_attr.attr, - &iio_dev_attr_incli_x_raw.dev_attr.attr, - &iio_dev_attr_incli_y_raw.dev_attr.attr, - &iio_const_attr_incli_scale.dev_attr.attr, - &iio_dev_attr_rot_raw.dev_attr.attr, NULL }; @@ -486,6 +490,10 @@ static int __devinit adis16209_probe(struct spi_device *spi) st->indio_dev->name = spi->dev.driver->name; st->indio_dev->dev.parent = &spi->dev; st->indio_dev->attrs = &adis16209_attribute_group; + st->indio_dev->channels = adis16209_channels; + st->indio_dev->num_channels = ARRAY_SIZE(adis16209_channels); + st->indio_dev->read_raw = &adis16209_read_raw; + st->indio_dev->write_raw = &adis16209_write_raw; st->indio_dev->dev_data = (void *)(st); st->indio_dev->driver_module = THIS_MODULE; st->indio_dev->modes = INDIO_DIRECT_MODE; @@ -499,7 +507,9 @@ static int __devinit adis16209_probe(struct spi_device *spi) goto error_unreg_ring_funcs; regdone = 1; - ret = iio_ring_buffer_register(st->indio_dev->ring, 0); + ret = iio_ring_buffer_register_ex(st->indio_dev->ring, 0, + adis16209_channels, + ARRAY_SIZE(adis16209_channels)); if (ret) { printk(KERN_ERR "failed to initialize the ring\n"); goto error_unreg_ring_funcs; @@ -512,7 +522,7 @@ static int __devinit adis16209_probe(struct spi_device *spi) } /* Get the device into a sane initial state */ - ret = adis16209_initial_setup(st); + ret = adis16209_initial_setup(st->indio_dev); if (ret) goto error_remove_trigger; return 0; |