diff options
Diffstat (limited to 'drivers/staging/iio/imu/adis16300_ring.c')
| -rw-r--r-- | drivers/staging/iio/imu/adis16300_ring.c | 238 |
1 files changed, 0 insertions, 238 deletions
diff --git a/drivers/staging/iio/imu/adis16300_ring.c b/drivers/staging/iio/imu/adis16300_ring.c deleted file mode 100644 index 114fdf4fd47d..000000000000 --- a/drivers/staging/iio/imu/adis16300_ring.c +++ /dev/null @@ -1,238 +0,0 @@ -#include <linux/interrupt.h> -#include <linux/irq.h> -#include <linux/gpio.h> -#include <linux/workqueue.h> -#include <linux/mutex.h> -#include <linux/device.h> -#include <linux/kernel.h> -#include <linux/spi/spi.h> -#include <linux/slab.h> -#include <linux/sysfs.h> -#include <linux/list.h> - -#include "../iio.h" -#include "../sysfs.h" -#include "../ring_sw.h" -#include "../accel/accel.h" -#include "../trigger.h" -#include "adis16300.h" - -static IIO_SCAN_EL_C(in0_supply, ADIS16300_SCAN_SUPPLY, - ADIS16300_SUPPLY_OUT, NULL); -static IIO_CONST_ATTR_SCAN_EL_TYPE(in0_supply, u, 12, 16); -static IIO_SCAN_EL_C(gyro_x, ADIS16300_SCAN_GYRO_X, ADIS16300_XGYRO_OUT, NULL); -static IIO_CONST_ATTR_SCAN_EL_TYPE(gyro, s, 14, 16); - -static IIO_SCAN_EL_C(accel_x, ADIS16300_SCAN_ACC_X, ADIS16300_XACCL_OUT, NULL); -static IIO_SCAN_EL_C(accel_y, ADIS16300_SCAN_ACC_Y, ADIS16300_YACCL_OUT, NULL); -static IIO_SCAN_EL_C(accel_z, ADIS16300_SCAN_ACC_Z, ADIS16300_ZACCL_OUT, NULL); -static IIO_CONST_ATTR_SCAN_EL_TYPE(accel, s, 14, 16); - -static IIO_SCAN_EL_C(temp, ADIS16300_SCAN_TEMP, ADIS16300_TEMP_OUT, NULL); -static IIO_CONST_ATTR_SCAN_EL_TYPE(temp, s, 12, 16); - -static IIO_SCAN_EL_C(in1, ADIS16300_SCAN_ADC_0, ADIS16300_AUX_ADC, NULL); -static IIO_CONST_ATTR_SCAN_EL_TYPE(in1, u, 12, 16); - -static IIO_SCAN_EL_C(incli_x, ADIS16300_SCAN_INCLI_X, - ADIS16300_XINCLI_OUT, NULL); -static IIO_SCAN_EL_C(incli_y, ADIS16300_SCAN_INCLI_Y, - ADIS16300_YINCLI_OUT, NULL); -static IIO_CONST_ATTR_SCAN_EL_TYPE(incli, s, 13, 16); - -static IIO_SCAN_EL_TIMESTAMP(9); -static IIO_CONST_ATTR_SCAN_EL_TYPE(timestamp, s, 64, 64); - -static struct attribute *adis16300_scan_el_attrs[] = { - &iio_scan_el_in0_supply.dev_attr.attr, - &iio_const_attr_in0_supply_index.dev_attr.attr, - &iio_const_attr_in0_supply_type.dev_attr.attr, - &iio_scan_el_gyro_x.dev_attr.attr, - &iio_const_attr_gyro_x_index.dev_attr.attr, - &iio_const_attr_gyro_type.dev_attr.attr, - &iio_scan_el_temp.dev_attr.attr, - &iio_const_attr_temp_index.dev_attr.attr, - &iio_const_attr_temp_type.dev_attr.attr, - &iio_scan_el_accel_x.dev_attr.attr, - &iio_const_attr_accel_x_index.dev_attr.attr, - &iio_scan_el_accel_y.dev_attr.attr, - &iio_const_attr_accel_y_index.dev_attr.attr, - &iio_scan_el_accel_z.dev_attr.attr, - &iio_const_attr_accel_z_index.dev_attr.attr, - &iio_const_attr_accel_type.dev_attr.attr, - &iio_scan_el_incli_x.dev_attr.attr, - &iio_const_attr_incli_x_index.dev_attr.attr, - &iio_scan_el_incli_y.dev_attr.attr, - &iio_const_attr_incli_y_index.dev_attr.attr, - &iio_const_attr_incli_type.dev_attr.attr, - &iio_scan_el_in1.dev_attr.attr, - &iio_const_attr_in1_index.dev_attr.attr, - &iio_const_attr_in1_type.dev_attr.attr, - &iio_scan_el_timestamp.dev_attr.attr, - &iio_const_attr_timestamp_index.dev_attr.attr, - &iio_const_attr_timestamp_type.dev_attr.attr, - NULL, -}; - -static struct attribute_group adis16300_scan_el_group = { - .attrs = adis16300_scan_el_attrs, - .name = "scan_elements", -}; - -/** - * adis16300_poll_func_th() top half interrupt handler called by trigger - * @private_data: iio_dev - **/ -static void adis16300_poll_func_th(struct iio_dev *indio_dev, s64 time) -{ - struct adis16300_state *st = iio_dev_get_devdata(indio_dev); - st->last_timestamp = time; - schedule_work(&st->work_trigger_to_ring); - /* Indicate that this interrupt is being handled */ - - /* Technically this is trigger related, but without this - * handler running there is currently no way for the interrupt - * to clear. - */ -} - -/** - * adis16300_spi_read_burst() - read all data registers - * @dev: device associated with child of actual device (iio_dev or iio_trig) - * @rx: somewhere to pass back the value read (min size is 24 bytes) - **/ -static int adis16300_spi_read_burst(struct device *dev, u8 *rx) -{ - struct spi_message msg; - struct iio_dev *indio_dev = dev_get_drvdata(dev); - struct adis16300_state *st = iio_dev_get_devdata(indio_dev); - u32 old_speed_hz = st->us->max_speed_hz; - int ret; - - struct spi_transfer xfers[] = { - { - .tx_buf = st->tx, - .bits_per_word = 8, - .len = 2, - .cs_change = 0, - }, { - .rx_buf = rx, - .bits_per_word = 8, - .len = 18, - .cs_change = 0, - }, - }; - - mutex_lock(&st->buf_lock); - st->tx[0] = ADIS16300_READ_REG(ADIS16300_GLOB_CMD); - st->tx[1] = 0; - - spi_message_init(&msg); - spi_message_add_tail(&xfers[0], &msg); - spi_message_add_tail(&xfers[1], &msg); - - st->us->max_speed_hz = ADIS16300_SPI_BURST; - spi_setup(st->us); - - ret = spi_sync(st->us, &msg); - if (ret) - dev_err(&st->us->dev, "problem when burst reading"); - - st->us->max_speed_hz = old_speed_hz; - spi_setup(st->us); - 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 void adis16300_trigger_bh_to_ring(struct work_struct *work_s) -{ - struct adis16300_state *st - = container_of(work_s, struct adis16300_state, - work_trigger_to_ring); - struct iio_ring_buffer *ring = st->indio_dev->ring; - - int i = 0; - s16 *data; - size_t datasize = ring->access.get_bytes_per_datum(ring); - - data = kmalloc(datasize , GFP_KERNEL); - if (data == NULL) { - dev_err(&st->us->dev, "memory alloc failed in ring bh"); - return; - } - - if (ring->scan_count) - if (adis16300_spi_read_burst(&st->indio_dev->dev, st->rx) >= 0) - for (; i < ring->scan_count; i++) - data[i] = be16_to_cpup( - (__be16 *)&(st->rx[i*2])); - - /* Guaranteed to be aligned with 8 byte boundary */ - if (ring->scan_timestamp) - *((s64 *)(data + ((i + 3)/4)*4)) = st->last_timestamp; - - ring->access.store_to(ring, - (u8 *)data, - st->last_timestamp); - - iio_trigger_notify_done(st->indio_dev->trig); - kfree(data); - - return; -} - -void adis16300_unconfigure_ring(struct iio_dev *indio_dev) -{ - kfree(indio_dev->pollfunc); - iio_sw_rb_free(indio_dev->ring); -} - -int adis16300_configure_ring(struct iio_dev *indio_dev) -{ - int ret = 0; - struct adis16300_state *st = indio_dev->dev_data; - struct iio_ring_buffer *ring; - INIT_WORK(&st->work_trigger_to_ring, adis16300_trigger_bh_to_ring); - - ring = iio_sw_rb_allocate(indio_dev); - if (!ring) { - ret = -ENOMEM; - return ret; - } - indio_dev->ring = ring; - /* Effectively select the ring buffer implementation */ - iio_ring_sw_register_funcs(&ring->access); - ring->bpe = 2; - ring->scan_el_attrs = &adis16300_scan_el_group; - ring->scan_timestamp = true; - ring->preenable = &iio_sw_ring_preenable; - ring->postenable = &iio_triggered_ring_postenable; - ring->predisable = &iio_triggered_ring_predisable; - ring->owner = THIS_MODULE; - - /* Set default scan mode */ - iio_scan_mask_set(ring, iio_scan_el_in0_supply.number); - iio_scan_mask_set(ring, iio_scan_el_gyro_x.number); - iio_scan_mask_set(ring, iio_scan_el_accel_x.number); - iio_scan_mask_set(ring, iio_scan_el_accel_y.number); - iio_scan_mask_set(ring, iio_scan_el_accel_z.number); - iio_scan_mask_set(ring, iio_scan_el_temp.number); - iio_scan_mask_set(ring, iio_scan_el_in1.number); - iio_scan_mask_set(ring, iio_scan_el_incli_x.number); - iio_scan_mask_set(ring, iio_scan_el_incli_y.number); - - ret = iio_alloc_pollfunc(indio_dev, NULL, &adis16300_poll_func_th); - if (ret) - goto error_iio_sw_rb_free; - - indio_dev->modes |= INDIO_RING_TRIGGERED; - return 0; - -error_iio_sw_rb_free: - iio_sw_rb_free(indio_dev->ring); - return ret; -} - |