// SPDX-License-Identifier: GPL-2.0+ /* * pcmmio.c * Driver for Winsystems PC-104 based multifunction IO board. * * COMEDI - Linux Control and Measurement Device Interface * Copyright (C) 2007 Calin A. Culianu <[email protected]> */ /* * Driver: pcmmio * Description: A driver for the PCM-MIO multifunction board * Devices: [Winsystems] PCM-MIO (pcmmio) * Author: Calin Culianu <[email protected]> * Updated: Wed, May 16 2007 16:21:10 -0500 * Status: works * * A driver for the PCM-MIO multifunction board from Winsystems. This * is a PC-104 based I/O board. It contains four subdevices: * * subdevice 0 - 16 channels of 16-bit AI * subdevice 1 - 8 channels of 16-bit AO * subdevice 2 - first 24 channels of the 48 channel of DIO * (with edge-triggered interrupt support) * subdevice 3 - last 24 channels of the 48 channel DIO * (no interrupt support for this bank of channels) * * Some notes: * * Synchronous reads and writes are the only things implemented for analog * input and output. The hardware itself can do streaming acquisition, etc. * * Asynchronous I/O for the DIO subdevices *is* implemented, however! They * are basically edge-triggered interrupts for any configuration of the * channels in subdevice 2. * * Also note that this interrupt support is untested. * * A few words about edge-detection IRQ support (commands on DIO): * * To use edge-detection IRQ support for the DIO subdevice, pass the IRQ * of the board to the comedi_config command. The board IRQ is not jumpered * but rather configured through software, so any IRQ from 1-15 is OK. * * Due to the genericity of the comedi API, you need to create a special * comedi_command in order to use edge-triggered interrupts for DIO. * * Use comedi_commands with TRIG_NOW. Your callback will be called each * time an edge is detected on the specified DIO line(s), and the data * values will be two sample_t's, which should be concatenated to form * one 32-bit unsigned int. This value is the mask of channels that had * edges detected from your channel list. Note that the bits positions * in the mask correspond to positions in your chanlist when you * specified the command and *not* channel id's! * * To set the polarity of the edge-detection interrupts pass a nonzero value * for either CR_RANGE or CR_AREF for edge-up polarity, or a zero * value for both CR_RANGE and CR_AREF if you want edge-down polarity. * * Configuration Options: * [0] - I/O port base address * [1] - IRQ (optional -- for edge-detect interrupt support only, * leave out if you don't need this feature) */ #include <linux/module.h> #include <linux/interrupt.h> #include <linux/slab.h> #include <linux/comedi/comedidev.h> /* * Register I/O map */ #define PCMMIO_AI_LSB_REG … #define PCMMIO_AI_MSB_REG … #define PCMMIO_AI_CMD_REG … #define PCMMIO_AI_CMD_SE … #define PCMMIO_AI_CMD_ODD_CHAN … #define PCMMIO_AI_CMD_CHAN_SEL(x) … #define PCMMIO_AI_CMD_RANGE(x) … #define PCMMIO_RESOURCE_REG … #define PCMMIO_RESOURCE_IRQ(x) … #define PCMMIO_AI_STATUS_REG … #define PCMMIO_AI_STATUS_DATA_READY … #define PCMMIO_AI_STATUS_DATA_DMA_PEND … #define PCMMIO_AI_STATUS_CMD_DMA_PEND … #define PCMMIO_AI_STATUS_IRQ_PEND … #define PCMMIO_AI_STATUS_DATA_DRQ_ENA … #define PCMMIO_AI_STATUS_REG_SEL … #define PCMMIO_AI_STATUS_CMD_DRQ_ENA … #define PCMMIO_AI_STATUS_IRQ_ENA … #define PCMMIO_AI_RES_ENA_REG … #define PCMMIO_AI_RES_ENA_CMD_REG_ACCESS … #define PCMMIO_AI_RES_ENA_AI_RES_ACCESS … #define PCMMIO_AI_RES_ENA_DIO_RES_ACCESS … #define PCMMIO_AI_2ND_ADC_OFFSET … #define PCMMIO_AO_LSB_REG … #define PCMMIO_AO_LSB_SPAN(x) … #define PCMMIO_AO_MSB_REG … #define PCMMIO_AO_CMD_REG … #define PCMMIO_AO_CMD_WR_SPAN … #define PCMMIO_AO_CMD_WR_CODE … #define PCMMIO_AO_CMD_UPDATE … #define PCMMIO_AO_CMD_UPDATE_ALL … #define PCMMIO_AO_CMD_WR_SPAN_UPDATE … #define PCMMIO_AO_CMD_WR_CODE_UPDATE … #define PCMMIO_AO_CMD_WR_SPAN_UPDATE_ALL … #define PCMMIO_AO_CMD_WR_CODE_UPDATE_ALL … #define PCMMIO_AO_CMD_RD_B1_SPAN … #define PCMMIO_AO_CMD_RD_B1_CODE … #define PCMMIO_AO_CMD_RD_B2_SPAN … #define PCMMIO_AO_CMD_RD_B2_CODE … #define PCMMIO_AO_CMD_NOP … #define PCMMIO_AO_CMD_CHAN_SEL(x) … #define PCMMIO_AO_CMD_CHAN_SEL_ALL … #define PCMMIO_AO_STATUS_REG … #define PCMMIO_AO_STATUS_DATA_READY … #define PCMMIO_AO_STATUS_DATA_DMA_PEND … #define PCMMIO_AO_STATUS_CMD_DMA_PEND … #define PCMMIO_AO_STATUS_IRQ_PEND … #define PCMMIO_AO_STATUS_DATA_DRQ_ENA … #define PCMMIO_AO_STATUS_REG_SEL … #define PCMMIO_AO_STATUS_CMD_DRQ_ENA … #define PCMMIO_AO_STATUS_IRQ_ENA … #define PCMMIO_AO_RESOURCE_ENA_REG … #define PCMMIO_AO_2ND_DAC_OFFSET … /* * WinSystems WS16C48 * * Offset Page 0 Page 1 Page 2 Page 3 * ------ ----------- ----------- ----------- ----------- * 0x10 Port 0 I/O Port 0 I/O Port 0 I/O Port 0 I/O * 0x11 Port 1 I/O Port 1 I/O Port 1 I/O Port 1 I/O * 0x12 Port 2 I/O Port 2 I/O Port 2 I/O Port 2 I/O * 0x13 Port 3 I/O Port 3 I/O Port 3 I/O Port 3 I/O * 0x14 Port 4 I/O Port 4 I/O Port 4 I/O Port 4 I/O * 0x15 Port 5 I/O Port 5 I/O Port 5 I/O Port 5 I/O * 0x16 INT_PENDING INT_PENDING INT_PENDING INT_PENDING * 0x17 Page/Lock Page/Lock Page/Lock Page/Lock * 0x18 N/A POL_0 ENAB_0 INT_ID0 * 0x19 N/A POL_1 ENAB_1 INT_ID1 * 0x1a N/A POL_2 ENAB_2 INT_ID2 */ #define PCMMIO_PORT_REG(x) … #define PCMMIO_INT_PENDING_REG … #define PCMMIO_PAGE_LOCK_REG … #define PCMMIO_LOCK_PORT(x) … #define PCMMIO_PAGE(x) … #define PCMMIO_PAGE_MASK … #define PCMMIO_PAGE_POL … #define PCMMIO_PAGE_ENAB … #define PCMMIO_PAGE_INT_ID … #define PCMMIO_PAGE_REG(x) … static const struct comedi_lrange pcmmio_ai_ranges = …; static const struct comedi_lrange pcmmio_ao_ranges = …; struct pcmmio_private { … }; static void pcmmio_dio_write(struct comedi_device *dev, unsigned int val, int page, int port) { … } static unsigned int pcmmio_dio_read(struct comedi_device *dev, int page, int port) { … } /* * Each channel can be individually programmed for input or output. * Writing a '0' to a channel causes the corresponding output pin * to go to a high-z state (pulled high by an external 10K resistor). * This allows it to be used as an input. When used in the input mode, * a read reflects the inverted state of the I/O pin, such that a * high on the pin will read as a '0' in the register. Writing a '1' * to a bit position causes the pin to sink current (up to 12mA), * effectively pulling it low. */ static int pcmmio_dio_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { … } static int pcmmio_dio_insn_config(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { … } static void pcmmio_reset(struct comedi_device *dev) { … } /* devpriv->spinlock is already locked */ static void pcmmio_stop_intr(struct comedi_device *dev, struct comedi_subdevice *s) { … } static void pcmmio_handle_dio_intr(struct comedi_device *dev, struct comedi_subdevice *s, unsigned int triggered) { … } static irqreturn_t interrupt_pcmmio(int irq, void *d) { … } /* devpriv->spinlock is already locked */ static void pcmmio_start_intr(struct comedi_device *dev, struct comedi_subdevice *s) { … } static int pcmmio_cancel(struct comedi_device *dev, struct comedi_subdevice *s) { … } static int pcmmio_inttrig_start_intr(struct comedi_device *dev, struct comedi_subdevice *s, unsigned int trig_num) { … } /* * 'do_cmd' function for an 'INTERRUPT' subdevice. */ static int pcmmio_cmd(struct comedi_device *dev, struct comedi_subdevice *s) { … } static int pcmmio_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_cmd *cmd) { … } static int pcmmio_ai_eoc(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned long context) { … } static int pcmmio_ai_insn_read(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { … } static int pcmmio_ao_eoc(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned long context) { … } static int pcmmio_ao_insn_write(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { … } static int pcmmio_attach(struct comedi_device *dev, struct comedi_devconfig *it) { … } static struct comedi_driver pcmmio_driver = …; module_comedi_driver(…); MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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