diff options
| -rw-r--r-- | drivers/iio/imu/adis.c | 145 | ||||
| -rw-r--r-- | drivers/iio/imu/adis_buffer.c | 2 | ||||
| -rw-r--r-- | include/linux/iio/imu/adis.h | 81 |
3 files changed, 171 insertions, 57 deletions
diff --git a/drivers/iio/imu/adis.c b/drivers/iio/imu/adis.c index 28d4df2fe76a..280a49584adf 100644 --- a/drivers/iio/imu/adis.c +++ b/drivers/iio/imu/adis.c @@ -27,36 +27,10 @@ #define ADIS_MSC_CTRL_DATA_RDY_DIO2 BIT(0) #define ADIS_GLOB_CMD_SW_RESET BIT(7) -/** - * adis_write_reg_8() - Write single byte to a register - * @adis: The adis device - * @reg: The address of the register to be written - * @val: The value to write - */ -int adis_write_reg_8(struct adis *adis, unsigned int reg, uint8_t val) -{ - int ret; - - mutex_lock(&adis->txrx_lock); - adis->tx[0] = ADIS_WRITE_REG(reg); - adis->tx[1] = val; - - ret = spi_write(adis->spi, adis->tx, 2); - mutex_unlock(&adis->txrx_lock); - - return ret; -} -EXPORT_SYMBOL_GPL(adis_write_reg_8); - -/** - * adis_write_reg_16() - Write 2 bytes to a pair of registers - * @adis: The adis device - * @reg: The address of the lower of the two registers - * @val: Value to be written - */ -int adis_write_reg_16(struct adis *adis, unsigned int reg, uint16_t value) +int adis_write_reg(struct adis *adis, unsigned int reg, + unsigned int value, unsigned int size) { - int ret; + int ret, i; struct spi_message msg; struct spi_transfer xfers[] = { { @@ -69,33 +43,69 @@ int adis_write_reg_16(struct adis *adis, unsigned int reg, uint16_t value) .tx_buf = adis->tx + 2, .bits_per_word = 8, .len = 2, + .cs_change = 1, + .delay_usecs = adis->data->write_delay, + }, { + .tx_buf = adis->tx + 4, + .bits_per_word = 8, + .len = 2, + .cs_change = 1, + .delay_usecs = adis->data->write_delay, + }, { + .tx_buf = adis->tx + 6, + .bits_per_word = 8, + .len = 2, .delay_usecs = adis->data->write_delay, }, }; mutex_lock(&adis->txrx_lock); - adis->tx[0] = ADIS_WRITE_REG(reg); - adis->tx[1] = value & 0xff; - adis->tx[2] = ADIS_WRITE_REG(reg + 1); - adis->tx[3] = (value >> 8) & 0xff; spi_message_init(&msg); - spi_message_add_tail(&xfers[0], &msg); - spi_message_add_tail(&xfers[1], &msg); + switch (size) { + case 4: + adis->tx[6] = ADIS_WRITE_REG(reg + 3); + adis->tx[7] = (value >> 24) & 0xff; + adis->tx[4] = ADIS_WRITE_REG(reg + 2); + adis->tx[5] = (value >> 16) & 0xff; + case 2: + adis->tx[2] = ADIS_WRITE_REG(reg + 1); + adis->tx[3] = (value >> 8) & 0xff; + case 1: + adis->tx[0] = ADIS_WRITE_REG(reg); + adis->tx[1] = value & 0xff; + break; + default: + ret = -EINVAL; + goto out_unlock; + } + + xfers[size - 1].cs_change = 0; + + for (i = 0; i < size; i++) + spi_message_add_tail(&xfers[i], &msg); + ret = spi_sync(adis->spi, &msg); + if (ret) { + dev_err(&adis->spi->dev, "Failed to write register 0x%02X: %d\n", + reg, ret); + } + +out_unlock: mutex_unlock(&adis->txrx_lock); return ret; } -EXPORT_SYMBOL_GPL(adis_write_reg_16); +EXPORT_SYMBOL_GPL(adis_write_reg); /** - * adis_read_reg_16() - read 2 bytes from a 16-bit register + * adis_read_reg() - read 2 bytes from a 16-bit register * @adis: The adis device * @reg: The address of the lower of the two registers * @val: The value read back from the device */ -int adis_read_reg_16(struct adis *adis, unsigned int reg, uint16_t *val) +int adis_read_reg(struct adis *adis, unsigned int reg, + unsigned int *val, unsigned int size) { struct spi_message msg; int ret; @@ -107,33 +117,61 @@ int adis_read_reg_16(struct adis *adis, unsigned int reg, uint16_t *val) .cs_change = 1, .delay_usecs = adis->data->read_delay, }, { + .tx_buf = adis->tx + 2, .rx_buf = adis->rx, .bits_per_word = 8, .len = 2, + .cs_change = 1, + .delay_usecs = adis->data->read_delay, + }, { + .rx_buf = adis->rx + 2, + .bits_per_word = 8, + .len = 2, .delay_usecs = adis->data->read_delay, }, }; mutex_lock(&adis->txrx_lock); - adis->tx[0] = ADIS_READ_REG(reg); - adis->tx[1] = 0; - spi_message_init(&msg); - spi_message_add_tail(&xfers[0], &msg); - spi_message_add_tail(&xfers[1], &msg); + + switch (size) { + case 4: + adis->tx[0] = ADIS_READ_REG(reg + 2); + adis->tx[1] = 0; + spi_message_add_tail(&xfers[0], &msg); + case 2: + adis->tx[2] = ADIS_READ_REG(reg); + adis->tx[3] = 0; + spi_message_add_tail(&xfers[1], &msg); + spi_message_add_tail(&xfers[2], &msg); + break; + default: + ret = -EINVAL; + goto out_unlock; + } + ret = spi_sync(adis->spi, &msg); if (ret) { - dev_err(&adis->spi->dev, "Failed to read 16 bit register 0x%02X: %d\n", + dev_err(&adis->spi->dev, "Failed to read register 0x%02X: %d\n", reg, ret); - goto error_ret; + goto out_unlock; } - *val = get_unaligned_be16(adis->rx); -error_ret: + switch (size) { + case 4: + *val = get_unaligned_be32(adis->rx); + break; + case 2: + *val = get_unaligned_be16(adis->rx + 2); + break; + } + +out_unlock: mutex_unlock(&adis->txrx_lock); + return ret; } -EXPORT_SYMBOL_GPL(adis_read_reg_16); +EXPORT_SYMBOL_GPL(adis_read_reg); #ifdef CONFIG_DEBUG_FS @@ -304,25 +342,26 @@ int adis_single_conversion(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, unsigned int error_mask, int *val) { struct adis *adis = iio_device_get_drvdata(indio_dev); - uint16_t val16; + unsigned int uval; int ret; mutex_lock(&indio_dev->mlock); - ret = adis_read_reg_16(adis, chan->address, &val16); + ret = adis_read_reg(adis, chan->address, &uval, + chan->scan_type.storagebits / 8); if (ret) goto err_unlock; - if (val16 & error_mask) { + if (uval & error_mask) { ret = adis_check_status(adis); if (ret) goto err_unlock; } if (chan->scan_type.sign == 's') - *val = sign_extend32(val16, chan->scan_type.realbits - 1); + *val = sign_extend32(uval, chan->scan_type.realbits - 1); else - *val = val16 & ((1 << chan->scan_type.realbits) - 1); + *val = uval & ((1 << chan->scan_type.realbits) - 1); ret = IIO_VAL_INT; err_unlock: diff --git a/drivers/iio/imu/adis_buffer.c b/drivers/iio/imu/adis_buffer.c index a91b4cbdc73a..785713349e9f 100644 --- a/drivers/iio/imu/adis_buffer.c +++ b/drivers/iio/imu/adis_buffer.c @@ -64,6 +64,8 @@ int adis_update_scan_mode(struct iio_dev *indio_dev, for (i = 0; i < indio_dev->num_channels; i++, chan++) { if (!test_bit(chan->scan_index, scan_mask)) continue; + if (chan->scan_type.storagebits == 32) + *tx++ = cpu_to_be16((chan->address + 2) << 8); *tx++ = cpu_to_be16(chan->address << 8); } diff --git a/include/linux/iio/imu/adis.h b/include/linux/iio/imu/adis.h index fce7bc3ba0b5..6402a08c0e65 100644 --- a/include/linux/iio/imu/adis.h +++ b/include/linux/iio/imu/adis.h @@ -53,7 +53,7 @@ struct adis { struct spi_transfer *xfer; void *buffer; - uint8_t tx[8] ____cacheline_aligned; + uint8_t tx[10] ____cacheline_aligned; uint8_t rx[4]; }; @@ -61,9 +61,82 @@ int adis_init(struct adis *adis, struct iio_dev *indio_dev, struct spi_device *spi, const struct adis_data *data); int adis_reset(struct adis *adis); -int adis_write_reg_8(struct adis *adis, unsigned int reg, uint8_t val); -int adis_write_reg_16(struct adis *adis, unsigned int reg, uint16_t val); -int adis_read_reg_16(struct adis *adis, unsigned int reg, uint16_t *val); +int adis_write_reg(struct adis *adis, unsigned int reg, + unsigned int val, unsigned int size); +int adis_read_reg(struct adis *adis, unsigned int reg, + unsigned int *val, unsigned int size); + +/** + * adis_write_reg_8() - Write single byte to a register + * @adis: The adis device + * @reg: The address of the register to be written + * @value: The value to write + */ +static inline int adis_write_reg_8(struct adis *adis, unsigned int reg, + uint8_t val) +{ + return adis_write_reg(adis, reg, val, 1); +} + +/** + * adis_write_reg_16() - Write 2 bytes to a pair of registers + * @adis: The adis device + * @reg: The address of the lower of the two registers + * @value: Value to be written + */ +static inline int adis_write_reg_16(struct adis *adis, unsigned int reg, + uint16_t val) +{ + return adis_write_reg(adis, reg, val, 2); +} + +/** + * adis_write_reg_32() - write 4 bytes to four registers + * @adis: The adis device + * @reg: The address of the lower of the four register + * @value: Value to be written + */ +static inline int adis_write_reg_32(struct adis *adis, unsigned int reg, + uint32_t val) +{ + return adis_write_reg(adis, reg, val, 4); +} + +/** + * adis_read_reg_16() - read 2 bytes from a 16-bit register + * @adis: The adis device + * @reg: The address of the lower of the two registers + * @val: The value read back from the device + */ +static inline int adis_read_reg_16(struct adis *adis, unsigned int reg, + uint16_t *val) +{ + unsigned int tmp; + int ret; + + ret = adis_read_reg(adis, reg, &tmp, 2); + *val = tmp; + + return ret; +} + +/** + * adis_read_reg_32() - read 4 bytes from a 32-bit register + * @adis: The adis device + * @reg: The address of the lower of the two registers + * @val: The value read back from the device + */ +static inline int adis_read_reg_32(struct adis *adis, unsigned int reg, + uint32_t *val) +{ + unsigned int tmp; + int ret; + + ret = adis_read_reg(adis, reg, &tmp, 4); + *val = tmp; + + return ret; +} int adis_enable_irq(struct adis *adis, bool enable); int adis_check_status(struct adis *adis); |