// SPDX-License-Identifier: GPL-2.0+ /* * Comedi driver for CIO-DAS16/M1 * Author: Frank Mori Hess, based on code from the das16 driver. * Copyright (C) 2001 Frank Mori Hess <[email protected]> * * COMEDI - Linux Control and Measurement Device Interface * Copyright (C) 2000 David A. Schleef <[email protected]> */ /* * Driver: das16m1 * Description: CIO-DAS16/M1 * Author: Frank Mori Hess <[email protected]> * Devices: [Measurement Computing] CIO-DAS16/M1 (das16m1) * Status: works * * This driver supports a single board - the CIO-DAS16/M1. As far as I know, * there are no other boards that have the same register layout. Even the * CIO-DAS16/M1/16 is significantly different. * * I was _barely_ able to reach the full 1 MHz capability of this board, using * a hard real-time interrupt (set the TRIG_RT flag in your struct comedi_cmd * and use rtlinux or RTAI). The board can't do dma, so the bottleneck is * pulling the data across the ISA bus. I timed the interrupt handler, and it * took my computer ~470 microseconds to pull 512 samples from the board. So * at 1 Mhz sampling rate, expect your CPU to be spending almost all of its * time in the interrupt handler. * * This board has some unusual restrictions for its channel/gain list. If the * list has 2 or more channels in it, then two conditions must be satisfied: * (1) - even/odd channels must appear at even/odd indices in the list * (2) - the list must have an even number of entries. * * Configuration options: * [0] - base io address * [1] - irq (optional, but you probably want it) * * irq can be omitted, although the cmd interface will not work without it. */ #include <linux/module.h> #include <linux/slab.h> #include <linux/interrupt.h> #include <linux/comedi/comedidev.h> #include <linux/comedi/comedi_8255.h> #include <linux/comedi/comedi_8254.h> /* * Register map (dev->iobase) */ #define DAS16M1_AI_REG … #define DAS16M1_AI_TO_CHAN(x) … #define DAS16M1_AI_TO_SAMPLE(x) … #define DAS16M1_CS_REG … #define DAS16M1_CS_EXT_TRIG … #define DAS16M1_CS_OVRUN … #define DAS16M1_CS_IRQDATA … #define DAS16M1_DI_REG … #define DAS16M1_DO_REG … #define DAS16M1_CLR_INTR_REG … #define DAS16M1_INTR_CTRL_REG … #define DAS16M1_INTR_CTRL_PACER(x) … #define DAS16M1_INTR_CTRL_PACER_EXT … #define DAS16M1_INTR_CTRL_PACER_INT … #define DAS16M1_INTR_CTRL_PACER_MASK … #define DAS16M1_INTR_CTRL_IRQ(x) … #define DAS16M1_INTR_CTRL_INTE … #define DAS16M1_Q_ADDR_REG … #define DAS16M1_Q_REG … #define DAS16M1_Q_CHAN(x) … #define DAS16M1_Q_RANGE(x) … #define DAS16M1_8254_IOBASE1 … #define DAS16M1_8254_IOBASE2 … #define DAS16M1_8255_IOBASE … #define DAS16M1_8254_IOBASE3 … #define DAS16M1_SIZE2 … #define DAS16M1_AI_FIFO_SZ … static const struct comedi_lrange range_das16m1 = …; struct das16m1_private { … }; static void das16m1_ai_set_queue(struct comedi_device *dev, unsigned int *chanspec, unsigned int len) { … } static void das16m1_ai_munge(struct comedi_device *dev, struct comedi_subdevice *s, void *data, unsigned int num_bytes, unsigned int start_chan_index) { … } static int das16m1_ai_check_chanlist(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_cmd *cmd) { … } static int das16m1_ai_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_cmd *cmd) { … } static int das16m1_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s) { … } static int das16m1_ai_cancel(struct comedi_device *dev, struct comedi_subdevice *s) { … } static int das16m1_ai_eoc(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned long context) { … } static int das16m1_ai_insn_read(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { … } static int das16m1_di_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { … } static int das16m1_do_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { … } static void das16m1_handler(struct comedi_device *dev, unsigned int status) { … } static int das16m1_ai_poll(struct comedi_device *dev, struct comedi_subdevice *s) { … } static irqreturn_t das16m1_interrupt(int irq, void *d) { … } static int das16m1_irq_bits(unsigned int irq) { … } static int das16m1_attach(struct comedi_device *dev, struct comedi_devconfig *it) { … } static void das16m1_detach(struct comedi_device *dev) { … } static struct comedi_driver das16m1_driver = …; module_comedi_driver(…); MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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