diff options
Diffstat (limited to 'drivers/staging/iio/accel/sca3000.h')
| -rw-r--r-- | drivers/staging/iio/accel/sca3000.h | 279 |
1 files changed, 0 insertions, 279 deletions
diff --git a/drivers/staging/iio/accel/sca3000.h b/drivers/staging/iio/accel/sca3000.h deleted file mode 100644 index 4dcc8575cbe3..000000000000 --- a/drivers/staging/iio/accel/sca3000.h +++ /dev/null @@ -1,279 +0,0 @@ -/* - * sca3000.c -- support VTI sca3000 series accelerometers - * via SPI - * - * Copyright (c) 2007 Jonathan Cameron <jic23@kernel.org> - * - * Partly based upon tle62x0.c - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * Initial mode is direct measurement. - * - * Untested things - * - * Temperature reading (the e05 I'm testing with doesn't have a sensor) - * - * Free fall detection mode - supported but untested as I'm not droping my - * dubious wire rig far enough to test it. - * - * Unsupported as yet - * - * Time stamping of data from ring. Various ideas on how to do this but none - * are remotely simple. Suggestions welcome. - * - * Individual enabling disabling of channels going into ring buffer - * - * Overflow handling (this is signaled for all but 8 bit ring buffer mode.) - * - * Motion detector using AND combinations of signals. - * - * Note: Be very careful about not touching an register bytes marked - * as reserved on the data sheet. They really mean it as changing convents of - * some will cause the device to lock up. - * - * Known issues - on rare occasions the interrupts lock up. Not sure why as yet. - * Can probably alleviate this by reading the interrupt register on start, but - * that is really just brushing the problem under the carpet. - */ -#ifndef _SCA3000 -#define _SCA3000 - -#define SCA3000_WRITE_REG(a) (((a) << 2) | 0x02) -#define SCA3000_READ_REG(a) ((a) << 2) - -#define SCA3000_REG_ADDR_REVID 0x00 -#define SCA3000_REVID_MAJOR_MASK 0xf0 -#define SCA3000_REVID_MINOR_MASK 0x0f - -#define SCA3000_REG_ADDR_STATUS 0x02 -#define SCA3000_LOCKED 0x20 -#define SCA3000_EEPROM_CS_ERROR 0x02 -#define SCA3000_SPI_FRAME_ERROR 0x01 - -/* All reads done using register decrement so no need to directly access LSBs */ -#define SCA3000_REG_ADDR_X_MSB 0x05 -#define SCA3000_REG_ADDR_Y_MSB 0x07 -#define SCA3000_REG_ADDR_Z_MSB 0x09 - -#define SCA3000_REG_ADDR_RING_OUT 0x0f - -/* Temp read untested - the e05 doesn't have the sensor */ -#define SCA3000_REG_ADDR_TEMP_MSB 0x13 - -#define SCA3000_REG_ADDR_MODE 0x14 -#define SCA3000_MODE_PROT_MASK 0x28 - -#define SCA3000_RING_BUF_ENABLE 0x80 -#define SCA3000_RING_BUF_8BIT 0x40 -/* - * Free fall detection triggers an interrupt if the acceleration - * is below a threshold for equivalent of 25cm drop - */ -#define SCA3000_FREE_FALL_DETECT 0x10 -#define SCA3000_MEAS_MODE_NORMAL 0x00 -#define SCA3000_MEAS_MODE_OP_1 0x01 -#define SCA3000_MEAS_MODE_OP_2 0x02 - -/* - * In motion detection mode the accelerations are band pass filtered - * (approx 1 - 25Hz) and then a programmable threshold used to trigger - * and interrupt. - */ -#define SCA3000_MEAS_MODE_MOT_DET 0x03 - -#define SCA3000_REG_ADDR_BUF_COUNT 0x15 - -#define SCA3000_REG_ADDR_INT_STATUS 0x16 - -#define SCA3000_INT_STATUS_THREE_QUARTERS 0x80 -#define SCA3000_INT_STATUS_HALF 0x40 - -#define SCA3000_INT_STATUS_FREE_FALL 0x08 -#define SCA3000_INT_STATUS_Y_TRIGGER 0x04 -#define SCA3000_INT_STATUS_X_TRIGGER 0x02 -#define SCA3000_INT_STATUS_Z_TRIGGER 0x01 - -/* Used to allow access to multiplexed registers */ -#define SCA3000_REG_ADDR_CTRL_SEL 0x18 -/* Only available for SCA3000-D03 and SCA3000-D01 */ -#define SCA3000_REG_CTRL_SEL_I2C_DISABLE 0x01 -#define SCA3000_REG_CTRL_SEL_MD_CTRL 0x02 -#define SCA3000_REG_CTRL_SEL_MD_Y_TH 0x03 -#define SCA3000_REG_CTRL_SEL_MD_X_TH 0x04 -#define SCA3000_REG_CTRL_SEL_MD_Z_TH 0x05 -/* - * BE VERY CAREFUL WITH THIS, IF 3 BITS ARE NOT SET the device - * will not function - */ -#define SCA3000_REG_CTRL_SEL_OUT_CTRL 0x0B -#define SCA3000_OUT_CTRL_PROT_MASK 0xE0 -#define SCA3000_OUT_CTRL_BUF_X_EN 0x10 -#define SCA3000_OUT_CTRL_BUF_Y_EN 0x08 -#define SCA3000_OUT_CTRL_BUF_Z_EN 0x04 -#define SCA3000_OUT_CTRL_BUF_DIV_MASK 0x03 -#define SCA3000_OUT_CTRL_BUF_DIV_4 0x02 -#define SCA3000_OUT_CTRL_BUF_DIV_2 0x01 - -/* - * Control which motion detector interrupts are on. - * For now only OR combinations are supported. - */ -#define SCA3000_MD_CTRL_PROT_MASK 0xC0 -#define SCA3000_MD_CTRL_OR_Y 0x01 -#define SCA3000_MD_CTRL_OR_X 0x02 -#define SCA3000_MD_CTRL_OR_Z 0x04 -/* Currently unsupported */ -#define SCA3000_MD_CTRL_AND_Y 0x08 -#define SCA3000_MD_CTRL_AND_X 0x10 -#define SAC3000_MD_CTRL_AND_Z 0x20 - -/* - * Some control registers of complex access methods requiring this register to - * be used to remove a lock. - */ -#define SCA3000_REG_ADDR_UNLOCK 0x1e - -#define SCA3000_REG_ADDR_INT_MASK 0x21 -#define SCA3000_INT_MASK_PROT_MASK 0x1C - -#define SCA3000_INT_MASK_RING_THREE_QUARTER 0x80 -#define SCA3000_INT_MASK_RING_HALF 0x40 - -#define SCA3000_INT_MASK_ALL_INTS 0x02 -#define SCA3000_INT_MASK_ACTIVE_HIGH 0x01 -#define SCA3000_INT_MASK_ACTIVE_LOW 0x00 - -/* Values of multiplexed registers (write to ctrl_data after select) */ -#define SCA3000_REG_ADDR_CTRL_DATA 0x22 - -/* - * Measurement modes available on some sca3000 series chips. Code assumes others - * may become available in the future. - * - * Bypass - Bypass the low-pass filter in the signal channel so as to increase - * signal bandwidth. - * - * Narrow - Narrow low-pass filtering of the signal channel and half output - * data rate by decimation. - * - * Wide - Widen low-pass filtering of signal channel to increase bandwidth - */ -#define SCA3000_OP_MODE_BYPASS 0x01 -#define SCA3000_OP_MODE_NARROW 0x02 -#define SCA3000_OP_MODE_WIDE 0x04 -#define SCA3000_MAX_TX 6 -#define SCA3000_MAX_RX 2 - -/** - * struct sca3000_state - device instance state information - * @us: the associated spi device - * @info: chip variant information - * @interrupt_handler_ws: event interrupt handler for all events - * @last_timestamp: the timestamp of the last event - * @mo_det_use_count: reference counter for the motion detection unit - * @lock: lock used to protect elements of sca3000_state - * and the underlying device state. - * @bpse: number of bits per scan element - * @tx: dma-able transmit buffer - * @rx: dma-able receive buffer - **/ -struct sca3000_state { - struct spi_device *us; - const struct sca3000_chip_info *info; - struct work_struct interrupt_handler_ws; - s64 last_timestamp; - int mo_det_use_count; - struct mutex lock; - int bpse; - /* Can these share a cacheline ? */ - u8 rx[2] ____cacheline_aligned; - u8 tx[6] ____cacheline_aligned; -}; - -/** - * struct sca3000_chip_info - model dependent parameters - * @scale: scale * 10^-6 - * @temp_output: some devices have temperature sensors. - * @measurement_mode_freq: normal mode sampling frequency - * @option_mode_1: first optional mode. Not all models have one - * @option_mode_1_freq: option mode 1 sampling frequency - * @option_mode_2: second optional mode. Not all chips have one - * @option_mode_2_freq: option mode 2 sampling frequency - * - * This structure is used to hold information about the functionality of a given - * sca3000 variant. - **/ -struct sca3000_chip_info { - unsigned int scale; - bool temp_output; - int measurement_mode_freq; - int option_mode_1; - int option_mode_1_freq; - int option_mode_2; - int option_mode_2_freq; - int mot_det_mult_xz[6]; - int mot_det_mult_y[7]; -}; - -int sca3000_read_data_short(struct sca3000_state *st, - u8 reg_address_high, - int len); - -/** - * sca3000_write_reg() write a single register - * @address: address of register on chip - * @val: value to be written to register - * - * The main lock must be held. - **/ -int sca3000_write_reg(struct sca3000_state *st, u8 address, u8 val); - -#ifdef CONFIG_IIO_BUFFER -/** - * sca3000_register_ring_funcs() setup the ring state change functions - **/ -void sca3000_register_ring_funcs(struct iio_dev *indio_dev); - -/** - * sca3000_configure_ring() - allocate and configure ring buffer - * @indio_dev: iio-core device whose ring is to be configured - * - * The hardware ring buffer needs far fewer ring buffer functions than - * a software one as a lot of things are handled automatically. - * This function also tells the iio core that our device supports a - * hardware ring buffer mode. - **/ -int sca3000_configure_ring(struct iio_dev *indio_dev); - -/** - * sca3000_unconfigure_ring() - deallocate the ring buffer - * @indio_dev: iio-core device whose ring we are freeing - **/ -void sca3000_unconfigure_ring(struct iio_dev *indio_dev); - -/** - * sca3000_ring_int_process() handles ring related event pushing and escalation - * @val: the event code - **/ -void sca3000_ring_int_process(u8 val, struct iio_buffer *ring); - -#else -static inline void sca3000_register_ring_funcs(struct iio_dev *indio_dev) -{ -} - -static inline -int sca3000_register_ring_access_and_init(struct iio_dev *indio_dev) -{ - return 0; -} - -static inline void sca3000_ring_int_process(u8 val, void *ring) -{ -} - -#endif -#endif /* _SCA3000 */ |