diff options
Diffstat (limited to 'drivers/staging/iio/accel/adis16203_core.c')
-rw-r--r-- | drivers/staging/iio/accel/adis16203_core.c | 432 |
1 files changed, 60 insertions, 372 deletions
diff --git a/drivers/staging/iio/accel/adis16203_core.c b/drivers/staging/iio/accel/adis16203_core.c index e7b3441115ae..8c235273ff13 100644 --- a/drivers/staging/iio/accel/adis16203_core.c +++ b/drivers/staging/iio/accel/adis16203_core.c @@ -1,7 +1,7 @@ /* * ADIS16203 Programmable Digital Vibration Sensor driver * - * Copyright 2010 Analog Devices Inc. + * Copyright 2030 Analog Devices Inc. * * Licensed under the GPL-2 or later. */ @@ -18,254 +18,14 @@ #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #include <linux/iio/buffer.h> +#include <linux/iio/imu/adis.h> #include "adis16203.h" #define DRIVER_NAME "adis16203" -/** - * adis16203_spi_write_reg_8() - write single byte to a register - * @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 iio_dev *indio_dev, - u8 reg_address, - u8 val) -{ - int ret; - struct adis16203_state *st = iio_priv(indio_dev); - - mutex_lock(&st->buf_lock); - st->tx[0] = ADIS16203_WRITE_REG(reg_address); - st->tx[1] = val; - - ret = spi_write(st->us, st->tx, 2); - mutex_unlock(&st->buf_lock); - - return ret; -} - -/** - * adis16203_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 adis16203_spi_write_reg_16(struct iio_dev *indio_dev, - u8 lower_reg_address, - u16 value) -{ - int ret; - struct spi_message msg; - struct adis16203_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] = ADIS16203_WRITE_REG(lower_reg_address); - st->tx[1] = value & 0xFF; - st->tx[2] = ADIS16203_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; -} - -/** - * adis16203_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 adis16203_spi_read_reg_16(struct iio_dev *indio_dev, - u8 lower_reg_address, - u16 *val) -{ - struct spi_message msg; - struct adis16203_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] = ADIS16203_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 adis16203_check_status(struct iio_dev *indio_dev) -{ - u16 status; - int 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; - } - ret = status & 0x1F; - - 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; -} - -static int adis16203_reset(struct iio_dev *indio_dev) -{ - int ret; - ret = adis16203_spi_write_reg_8(indio_dev, - ADIS16203_GLOB_CMD, - ADIS16203_GLOB_CMD_SW_RESET); - if (ret) - dev_err(&indio_dev->dev, "problem resetting device"); - - return ret; -} - -int adis16203_set_irq(struct iio_dev *indio_dev, bool enable) -{ - int ret = 0; - u16 msc; - - ret = adis16203_spi_read_reg_16(indio_dev, ADIS16203_MSC_CTRL, &msc); - if (ret) - goto error_ret; - - msc |= ADIS16203_MSC_CTRL_ACTIVE_HIGH; - msc &= ~ADIS16203_MSC_CTRL_DATA_RDY_DIO1; - if (enable) - msc |= ADIS16203_MSC_CTRL_DATA_RDY_EN; - else - msc &= ~ADIS16203_MSC_CTRL_DATA_RDY_EN; - - ret = adis16203_spi_write_reg_16(indio_dev, ADIS16203_MSC_CTRL, msc); - -error_ret: - return ret; -} - -static int adis16203_self_test(struct iio_dev *indio_dev) -{ - int ret; - ret = adis16203_spi_write_reg_16(indio_dev, - ADIS16203_MSC_CTRL, - ADIS16203_MSC_CTRL_SELF_TEST_EN); - if (ret) { - dev_err(&indio_dev->dev, "problem starting self test"); - goto err_ret; - } - - adis16203_check_status(indio_dev); - -err_ret: - return ret; -} - -static int adis16203_initial_setup(struct iio_dev *indio_dev) -{ - int ret; - - /* Disable IRQ */ - ret = adis16203_set_irq(indio_dev, false); - if (ret) { - dev_err(&indio_dev->dev, "disable irq failed"); - goto err_ret; - } - - /* Do self test */ - ret = adis16203_self_test(indio_dev); - if (ret) { - dev_err(&indio_dev->dev, "self test failure"); - goto err_ret; - } - - /* Read status register to check the result */ - ret = adis16203_check_status(indio_dev); - if (ret) { - adis16203_reset(indio_dev); - dev_err(&indio_dev->dev, "device not playing ball -> reset"); - msleep(ADIS16203_STARTUP_DELAY); - ret = adis16203_check_status(indio_dev); - if (ret) { - dev_err(&indio_dev->dev, "giving up"); - goto err_ret; - } - } - -err_ret: - return ret; -} - -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 const u8 adis16203_addresses[] = { + [ADIS16203_SCAN_INCLI_X] = ADIS16203_INCL_NULL, }; static int adis16203_write_raw(struct iio_dev *indio_dev, @@ -274,9 +34,10 @@ static int adis16203_write_raw(struct iio_dev *indio_dev, int val2, long mask) { + struct adis *st = iio_priv(indio_dev); /* 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); + u8 addr = adis16203_addresses[chan->scan_index]; + return adis_write_reg_16(st, addr, val & 0x3FFF); } static int adis16203_read_raw(struct iio_dev *indio_dev, @@ -284,35 +45,15 @@ static int adis16203_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; s16 val16; switch (mask) { case IIO_CHAN_INFO_RAW: - mutex_lock(&indio_dev->mlock); - addr = adis16203_addresses[chan->address][0]; - ret = adis16203_spi_read_reg_16(indio_dev, addr, &val16); - if (ret) { - mutex_unlock(&indio_dev->mlock); - return ret; - } - - if (val16 & ADIS16203_ERROR_ACTIVE) { - ret = adis16203_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, + ADIS16203_ERROR_ACTIVE, val); case IIO_CHAN_INFO_SCALE: switch (chan->type) { case IIO_VOLTAGE: @@ -341,8 +82,8 @@ static int adis16203_read_raw(struct iio_dev *indio_dev, case IIO_CHAN_INFO_CALIBBIAS: bits = 14; mutex_lock(&indio_dev->mlock); - addr = adis16203_addresses[chan->address][1]; - ret = adis16203_spi_read_reg_16(indio_dev, addr, &val16); + addr = adis16203_addresses[chan->scan_index]; + ret = adis_read_reg_16(st, addr, &val16); if (ret) { mutex_unlock(&indio_dev->mlock); return ret; @@ -358,89 +99,53 @@ static int adis16203_read_raw(struct iio_dev *indio_dev, } static const struct iio_chan_spec adis16203_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 = ADIS16203_SCAN_SUPPLY, - .scan_type = { - .sign = 'u', - .realbits = 12, - .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 = ADIS16203_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 = ADIS16203_SCAN_INCLI_X, - .scan_type = { - .sign = 's', - .realbits = 14, - .storagebits = 16, - }, - }, { /* Fixme: Not what it appears to be - see data sheet */ - .type = IIO_INCLI, - .modified = 1, - .channel2 = IIO_MOD_Y, - .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | - IIO_CHAN_INFO_SCALE_SHARED_BIT, - .address = incli_y, - .scan_index = ADIS16203_SCAN_INCLI_Y, - .scan_type = { - .sign = 's', - .realbits = 14, - .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 = ADIS16203_SCAN_TEMP, - .scan_type = { - .sign = 'u', - .realbits = 12, - .storagebits = 16, - }, - }, + ADIS_SUPPLY_CHAN(ADIS16203_SUPPLY_OUT, ADIS16203_SCAN_SUPPLY, 12), + ADIS_AUX_ADC_CHAN(ADIS16203_AUX_ADC, ADIS16203_SCAN_AUX_ADC, 12), + ADIS_INCLI_CHAN(X, ADIS16203_XINCL_OUT, ADIS16203_SCAN_INCLI_X, + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT, 14), + /* Fixme: Not what it appears to be - see data sheet */ + ADIS_INCLI_CHAN(Y, ADIS16203_YINCL_OUT, ADIS16203_SCAN_INCLI_Y, 0, 14), + ADIS_TEMP_CHAN(ADIS16203_TEMP_OUT, ADIS16203_SCAN_TEMP, 12), IIO_CHAN_SOFT_TIMESTAMP(5), }; static const struct iio_info adis16203_info = { .read_raw = &adis16203_read_raw, .write_raw = &adis16203_write_raw, + .update_scan_mode = adis_update_scan_mode, .driver_module = THIS_MODULE, }; -static int __devinit adis16203_probe(struct spi_device *spi) +static const char * const adis16203_status_error_msgs[] = { + [ADIS16203_DIAG_STAT_SELFTEST_FAIL_BIT] = "Self test failure", + [ADIS16203_DIAG_STAT_SPI_FAIL_BIT] = "SPI failure", + [ADIS16203_DIAG_STAT_FLASH_UPT_BIT] = "Flash update failed", + [ADIS16203_DIAG_STAT_POWER_HIGH_BIT] = "Power supply above 3.625V", + [ADIS16203_DIAG_STAT_POWER_LOW_BIT] = "Power supply below 3.15V", +}; + +static const struct adis_data adis16203_data = { + .read_delay = 20, + .msc_ctrl_reg = ADIS16203_MSC_CTRL, + .glob_cmd_reg = ADIS16203_GLOB_CMD, + .diag_stat_reg = ADIS16203_DIAG_STAT, + + .self_test_mask = ADIS16203_MSC_CTRL_SELF_TEST_EN, + .startup_delay = ADIS16203_STARTUP_DELAY, + + .status_error_msgs = adis16203_status_error_msgs, + .status_error_mask = BIT(ADIS16203_DIAG_STAT_SELFTEST_FAIL_BIT) | + BIT(ADIS16203_DIAG_STAT_SPI_FAIL_BIT) | + BIT(ADIS16203_DIAG_STAT_FLASH_UPT_BIT) | + BIT(ADIS16203_DIAG_STAT_POWER_HIGH_BIT) | + BIT(ADIS16203_DIAG_STAT_POWER_LOW_BIT), +}; + +static int adis16203_probe(struct spi_device *spi) { int ret; struct iio_dev *indio_dev; - struct adis16203_state *st; + struct adis *st; /* setup the industrialio driver allocated elements */ indio_dev = iio_device_alloc(sizeof(*st)); @@ -451,8 +156,6 @@ static int __devinit adis16203_probe(struct spi_device *spi) st = iio_priv(indio_dev); /* 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; @@ -461,55 +164,40 @@ static int __devinit adis16203_probe(struct spi_device *spi) indio_dev->info = &adis16203_info; indio_dev->modes = INDIO_DIRECT_MODE; - ret = adis16203_configure_ring(indio_dev); + ret = adis_init(st, indio_dev, spi, &adis16203_data); if (ret) goto error_free_dev; - ret = iio_buffer_register(indio_dev, - 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 = adis16203_probe_trigger(indio_dev); - if (ret) - goto error_uninitialize_ring; - } + ret = adis_setup_buffer_and_trigger(st, indio_dev, NULL); + if (ret) + goto error_free_dev; /* Get the device into a sane initial state */ - ret = adis16203_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) - goto error_remove_trigger; + goto error_cleanup_buffer_trigger; return 0; -error_remove_trigger: - adis16203_remove_trigger(indio_dev); -error_uninitialize_ring: - iio_buffer_unregister(indio_dev); -error_unreg_ring_funcs: - adis16203_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: return ret; } -static int __devexit adis16203_remove(struct spi_device *spi) +static int adis16203_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); - adis16203_remove_trigger(indio_dev); - iio_buffer_unregister(indio_dev); - adis16203_unconfigure_ring(indio_dev); + adis_cleanup_buffer_and_trigger(st, indio_dev); iio_device_free(indio_dev); return 0; @@ -521,7 +209,7 @@ static struct spi_driver adis16203_driver = { .owner = THIS_MODULE, }, .probe = adis16203_probe, - .remove = __devexit_p(adis16203_remove), + .remove = adis16203_remove, }; module_spi_driver(adis16203_driver); |