// SPDX-License-Identifier: GPL-2.0+ /* * mpc624.c * Hardware driver for a Micro/sys inc. MPC-624 PC/104 board * * COMEDI - Linux Control and Measurement Device Interface * Copyright (C) 2000 David A. Schleef <[email protected]> */ /* * Driver: mpc624 * Description: Micro/sys MPC-624 PC/104 board * Devices: [Micro/sys] MPC-624 (mpc624) * Author: Stanislaw Raczynski <[email protected]> * Updated: Thu, 15 Sep 2005 12:01:18 +0200 * Status: working * * The Micro/sys MPC-624 board is based on the LTC2440 24-bit sigma-delta * ADC chip. * * Subdevices supported by the driver: * - Analog In: supported * - Digital I/O: not supported * - LEDs: not supported * - EEPROM: not supported * * Configuration Options: * [0] - I/O base address * [1] - conversion rate * Conversion rate RMS noise Effective Number Of Bits * 0 3.52kHz 23uV 17 * 1 1.76kHz 3.5uV 20 * 2 880Hz 2uV 21.3 * 3 440Hz 1.4uV 21.8 * 4 220Hz 1uV 22.4 * 5 110Hz 750uV 22.9 * 6 55Hz 510nV 23.4 * 7 27.5Hz 375nV 24 * 8 13.75Hz 250nV 24.4 * 9 6.875Hz 200nV 24.6 * [2] - voltage range * 0 -1.01V .. +1.01V * 1 -10.1V .. +10.1V */ #include <linux/module.h> #include <linux/comedi/comedidev.h> #include <linux/delay.h> /* Offsets of different ports */ #define MPC624_MASTER_CONTROL … #define MPC624_GNMUXCH … #define MPC624_ADC … #define MPC624_EE … #define MPC624_LEDS … #define MPC624_DIO … #define MPC624_IRQ_MASK … /* Register bits' names */ #define MPC624_ADBUSY … #define MPC624_ADSDO … #define MPC624_ADFO … #define MPC624_ADCS … #define MPC624_ADSCK … #define MPC624_ADSDI … /* 32-bit output value bits' names */ #define MPC624_EOC_BIT … #define MPC624_DMY_BIT … #define MPC624_SGN_BIT … /* SDI Speed/Resolution Programming bits */ #define MPC624_OSR(x) … #define MPC624_SPEED_3_52_KHZ … #define MPC624_SPEED_1_76_KHZ … #define MPC624_SPEED_880_HZ … #define MPC624_SPEED_440_HZ … #define MPC624_SPEED_220_HZ … #define MPC624_SPEED_110_HZ … #define MPC624_SPEED_55_HZ … #define MPC624_SPEED_27_5_HZ … #define MPC624_SPEED_13_75_HZ … #define MPC624_SPEED_6_875_HZ … struct mpc624_private { … }; /* -------------------------------------------------------------------------- */ static const struct comedi_lrange range_mpc624_bipolar1 = …; static const struct comedi_lrange range_mpc624_bipolar10 = …; static unsigned int mpc624_ai_get_sample(struct comedi_device *dev, struct comedi_subdevice *s) { … } static int mpc624_ai_eoc(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned long context) { … } static int mpc624_ai_insn_read(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { … } static int mpc624_attach(struct comedi_device *dev, struct comedi_devconfig *it) { … } static struct comedi_driver mpc624_driver = …; module_comedi_driver(…); MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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