18ffdff6aSGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0+
28ffdff6aSGreg Kroah-Hartman /*
38ffdff6aSGreg Kroah-Hartman * aio_iiro_16.c
48ffdff6aSGreg Kroah-Hartman * Comedi driver for Access I/O Products 104-IIRO-16 board
58ffdff6aSGreg Kroah-Hartman * Copyright (C) 2006 C&C Technologies, Inc.
68ffdff6aSGreg Kroah-Hartman */
78ffdff6aSGreg Kroah-Hartman
88ffdff6aSGreg Kroah-Hartman /*
98ffdff6aSGreg Kroah-Hartman * Driver: aio_iiro_16
108ffdff6aSGreg Kroah-Hartman * Description: Access I/O Products PC/104 Isolated Input/Relay Output Board
118ffdff6aSGreg Kroah-Hartman * Author: Zachary Ware <zach.ware@cctechnol.com>
128ffdff6aSGreg Kroah-Hartman * Devices: [Access I/O] 104-IIRO-16 (aio_iiro_16)
138ffdff6aSGreg Kroah-Hartman * Status: experimental
148ffdff6aSGreg Kroah-Hartman *
158ffdff6aSGreg Kroah-Hartman * Configuration Options:
168ffdff6aSGreg Kroah-Hartman * [0] - I/O port base address
178ffdff6aSGreg Kroah-Hartman * [1] - IRQ (optional)
188ffdff6aSGreg Kroah-Hartman *
198ffdff6aSGreg Kroah-Hartman * The board supports interrupts on change of state of the digital inputs.
208ffdff6aSGreg Kroah-Hartman * The sample data returned by the async command indicates which inputs
218ffdff6aSGreg Kroah-Hartman * changed state and the current state of the inputs:
228ffdff6aSGreg Kroah-Hartman *
238ffdff6aSGreg Kroah-Hartman * Bit 23 - IRQ Enable (1) / Disable (0)
248ffdff6aSGreg Kroah-Hartman * Bit 17 - Input 8-15 Changed State (1 = Changed, 0 = No Change)
258ffdff6aSGreg Kroah-Hartman * Bit 16 - Input 0-7 Changed State (1 = Changed, 0 = No Change)
268ffdff6aSGreg Kroah-Hartman * Bit 15 - Digital input 15
278ffdff6aSGreg Kroah-Hartman * ...
288ffdff6aSGreg Kroah-Hartman * Bit 0 - Digital input 0
298ffdff6aSGreg Kroah-Hartman */
308ffdff6aSGreg Kroah-Hartman
318ffdff6aSGreg Kroah-Hartman #include <linux/module.h>
328ffdff6aSGreg Kroah-Hartman #include <linux/interrupt.h>
33*df0e68c1SIan Abbott #include <linux/comedi/comedidev.h>
348ffdff6aSGreg Kroah-Hartman
358ffdff6aSGreg Kroah-Hartman #define AIO_IIRO_16_RELAY_0_7 0x00
368ffdff6aSGreg Kroah-Hartman #define AIO_IIRO_16_INPUT_0_7 0x01
378ffdff6aSGreg Kroah-Hartman #define AIO_IIRO_16_IRQ 0x02
388ffdff6aSGreg Kroah-Hartman #define AIO_IIRO_16_RELAY_8_15 0x04
398ffdff6aSGreg Kroah-Hartman #define AIO_IIRO_16_INPUT_8_15 0x05
408ffdff6aSGreg Kroah-Hartman #define AIO_IIRO_16_STATUS 0x07
418ffdff6aSGreg Kroah-Hartman #define AIO_IIRO_16_STATUS_IRQE BIT(7)
428ffdff6aSGreg Kroah-Hartman #define AIO_IIRO_16_STATUS_INPUT_8_15 BIT(1)
438ffdff6aSGreg Kroah-Hartman #define AIO_IIRO_16_STATUS_INPUT_0_7 BIT(0)
448ffdff6aSGreg Kroah-Hartman
aio_iiro_16_read_inputs(struct comedi_device * dev)458ffdff6aSGreg Kroah-Hartman static unsigned int aio_iiro_16_read_inputs(struct comedi_device *dev)
468ffdff6aSGreg Kroah-Hartman {
478ffdff6aSGreg Kroah-Hartman unsigned int val;
488ffdff6aSGreg Kroah-Hartman
498ffdff6aSGreg Kroah-Hartman val = inb(dev->iobase + AIO_IIRO_16_INPUT_0_7);
508ffdff6aSGreg Kroah-Hartman val |= inb(dev->iobase + AIO_IIRO_16_INPUT_8_15) << 8;
518ffdff6aSGreg Kroah-Hartman
528ffdff6aSGreg Kroah-Hartman return val;
538ffdff6aSGreg Kroah-Hartman }
548ffdff6aSGreg Kroah-Hartman
aio_iiro_16_cos(int irq,void * d)558ffdff6aSGreg Kroah-Hartman static irqreturn_t aio_iiro_16_cos(int irq, void *d)
568ffdff6aSGreg Kroah-Hartman {
578ffdff6aSGreg Kroah-Hartman struct comedi_device *dev = d;
588ffdff6aSGreg Kroah-Hartman struct comedi_subdevice *s = dev->read_subdev;
598ffdff6aSGreg Kroah-Hartman unsigned int status;
608ffdff6aSGreg Kroah-Hartman unsigned int val;
618ffdff6aSGreg Kroah-Hartman
628ffdff6aSGreg Kroah-Hartman status = inb(dev->iobase + AIO_IIRO_16_STATUS);
638ffdff6aSGreg Kroah-Hartman if (!(status & AIO_IIRO_16_STATUS_IRQE))
648ffdff6aSGreg Kroah-Hartman return IRQ_NONE;
658ffdff6aSGreg Kroah-Hartman
668ffdff6aSGreg Kroah-Hartman val = aio_iiro_16_read_inputs(dev);
678ffdff6aSGreg Kroah-Hartman val |= (status << 16);
688ffdff6aSGreg Kroah-Hartman
698ffdff6aSGreg Kroah-Hartman comedi_buf_write_samples(s, &val, 1);
708ffdff6aSGreg Kroah-Hartman comedi_handle_events(dev, s);
718ffdff6aSGreg Kroah-Hartman
728ffdff6aSGreg Kroah-Hartman return IRQ_HANDLED;
738ffdff6aSGreg Kroah-Hartman }
748ffdff6aSGreg Kroah-Hartman
aio_iiro_enable_irq(struct comedi_device * dev,bool enable)758ffdff6aSGreg Kroah-Hartman static void aio_iiro_enable_irq(struct comedi_device *dev, bool enable)
768ffdff6aSGreg Kroah-Hartman {
778ffdff6aSGreg Kroah-Hartman if (enable)
788ffdff6aSGreg Kroah-Hartman inb(dev->iobase + AIO_IIRO_16_IRQ);
798ffdff6aSGreg Kroah-Hartman else
808ffdff6aSGreg Kroah-Hartman outb(0, dev->iobase + AIO_IIRO_16_IRQ);
818ffdff6aSGreg Kroah-Hartman }
828ffdff6aSGreg Kroah-Hartman
aio_iiro_16_cos_cancel(struct comedi_device * dev,struct comedi_subdevice * s)838ffdff6aSGreg Kroah-Hartman static int aio_iiro_16_cos_cancel(struct comedi_device *dev,
848ffdff6aSGreg Kroah-Hartman struct comedi_subdevice *s)
858ffdff6aSGreg Kroah-Hartman {
868ffdff6aSGreg Kroah-Hartman aio_iiro_enable_irq(dev, false);
878ffdff6aSGreg Kroah-Hartman
888ffdff6aSGreg Kroah-Hartman return 0;
898ffdff6aSGreg Kroah-Hartman }
908ffdff6aSGreg Kroah-Hartman
aio_iiro_16_cos_cmd(struct comedi_device * dev,struct comedi_subdevice * s)918ffdff6aSGreg Kroah-Hartman static int aio_iiro_16_cos_cmd(struct comedi_device *dev,
928ffdff6aSGreg Kroah-Hartman struct comedi_subdevice *s)
938ffdff6aSGreg Kroah-Hartman {
948ffdff6aSGreg Kroah-Hartman aio_iiro_enable_irq(dev, true);
958ffdff6aSGreg Kroah-Hartman
968ffdff6aSGreg Kroah-Hartman return 0;
978ffdff6aSGreg Kroah-Hartman }
988ffdff6aSGreg Kroah-Hartman
aio_iiro_16_cos_cmdtest(struct comedi_device * dev,struct comedi_subdevice * s,struct comedi_cmd * cmd)998ffdff6aSGreg Kroah-Hartman static int aio_iiro_16_cos_cmdtest(struct comedi_device *dev,
1008ffdff6aSGreg Kroah-Hartman struct comedi_subdevice *s,
1018ffdff6aSGreg Kroah-Hartman struct comedi_cmd *cmd)
1028ffdff6aSGreg Kroah-Hartman {
1038ffdff6aSGreg Kroah-Hartman int err = 0;
1048ffdff6aSGreg Kroah-Hartman
1058ffdff6aSGreg Kroah-Hartman /* Step 1 : check if triggers are trivially valid */
1068ffdff6aSGreg Kroah-Hartman
1078ffdff6aSGreg Kroah-Hartman err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW);
1088ffdff6aSGreg Kroah-Hartman err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_EXT);
1098ffdff6aSGreg Kroah-Hartman err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_FOLLOW);
1108ffdff6aSGreg Kroah-Hartman err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
1118ffdff6aSGreg Kroah-Hartman err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_NONE);
1128ffdff6aSGreg Kroah-Hartman
1138ffdff6aSGreg Kroah-Hartman if (err)
1148ffdff6aSGreg Kroah-Hartman return 1;
1158ffdff6aSGreg Kroah-Hartman
1168ffdff6aSGreg Kroah-Hartman /* Step 2a : make sure trigger sources are unique */
1178ffdff6aSGreg Kroah-Hartman /* Step 2b : and mutually compatible */
1188ffdff6aSGreg Kroah-Hartman
1198ffdff6aSGreg Kroah-Hartman /* Step 3: check if arguments are trivially valid */
1208ffdff6aSGreg Kroah-Hartman
1218ffdff6aSGreg Kroah-Hartman err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
1228ffdff6aSGreg Kroah-Hartman err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
1238ffdff6aSGreg Kroah-Hartman err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0);
1248ffdff6aSGreg Kroah-Hartman err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
1258ffdff6aSGreg Kroah-Hartman cmd->chanlist_len);
1268ffdff6aSGreg Kroah-Hartman err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
1278ffdff6aSGreg Kroah-Hartman
1288ffdff6aSGreg Kroah-Hartman if (err)
1298ffdff6aSGreg Kroah-Hartman return 3;
1308ffdff6aSGreg Kroah-Hartman
1318ffdff6aSGreg Kroah-Hartman /* Step 4: fix up any arguments */
1328ffdff6aSGreg Kroah-Hartman
1338ffdff6aSGreg Kroah-Hartman /* Step 5: check channel list if it exists */
1348ffdff6aSGreg Kroah-Hartman
1358ffdff6aSGreg Kroah-Hartman return 0;
1368ffdff6aSGreg Kroah-Hartman }
1378ffdff6aSGreg Kroah-Hartman
aio_iiro_16_do_insn_bits(struct comedi_device * dev,struct comedi_subdevice * s,struct comedi_insn * insn,unsigned int * data)1388ffdff6aSGreg Kroah-Hartman static int aio_iiro_16_do_insn_bits(struct comedi_device *dev,
1398ffdff6aSGreg Kroah-Hartman struct comedi_subdevice *s,
1408ffdff6aSGreg Kroah-Hartman struct comedi_insn *insn,
1418ffdff6aSGreg Kroah-Hartman unsigned int *data)
1428ffdff6aSGreg Kroah-Hartman {
1438ffdff6aSGreg Kroah-Hartman if (comedi_dio_update_state(s, data)) {
1448ffdff6aSGreg Kroah-Hartman outb(s->state & 0xff, dev->iobase + AIO_IIRO_16_RELAY_0_7);
1458ffdff6aSGreg Kroah-Hartman outb((s->state >> 8) & 0xff,
1468ffdff6aSGreg Kroah-Hartman dev->iobase + AIO_IIRO_16_RELAY_8_15);
1478ffdff6aSGreg Kroah-Hartman }
1488ffdff6aSGreg Kroah-Hartman
1498ffdff6aSGreg Kroah-Hartman data[1] = s->state;
1508ffdff6aSGreg Kroah-Hartman
1518ffdff6aSGreg Kroah-Hartman return insn->n;
1528ffdff6aSGreg Kroah-Hartman }
1538ffdff6aSGreg Kroah-Hartman
aio_iiro_16_di_insn_bits(struct comedi_device * dev,struct comedi_subdevice * s,struct comedi_insn * insn,unsigned int * data)1548ffdff6aSGreg Kroah-Hartman static int aio_iiro_16_di_insn_bits(struct comedi_device *dev,
1558ffdff6aSGreg Kroah-Hartman struct comedi_subdevice *s,
1568ffdff6aSGreg Kroah-Hartman struct comedi_insn *insn,
1578ffdff6aSGreg Kroah-Hartman unsigned int *data)
1588ffdff6aSGreg Kroah-Hartman {
1598ffdff6aSGreg Kroah-Hartman data[1] = aio_iiro_16_read_inputs(dev);
1608ffdff6aSGreg Kroah-Hartman
1618ffdff6aSGreg Kroah-Hartman return insn->n;
1628ffdff6aSGreg Kroah-Hartman }
1638ffdff6aSGreg Kroah-Hartman
aio_iiro_16_attach(struct comedi_device * dev,struct comedi_devconfig * it)1648ffdff6aSGreg Kroah-Hartman static int aio_iiro_16_attach(struct comedi_device *dev,
1658ffdff6aSGreg Kroah-Hartman struct comedi_devconfig *it)
1668ffdff6aSGreg Kroah-Hartman {
1678ffdff6aSGreg Kroah-Hartman struct comedi_subdevice *s;
1688ffdff6aSGreg Kroah-Hartman int ret;
1698ffdff6aSGreg Kroah-Hartman
1708ffdff6aSGreg Kroah-Hartman ret = comedi_request_region(dev, it->options[0], 0x8);
1718ffdff6aSGreg Kroah-Hartman if (ret)
1728ffdff6aSGreg Kroah-Hartman return ret;
1738ffdff6aSGreg Kroah-Hartman
1748ffdff6aSGreg Kroah-Hartman aio_iiro_enable_irq(dev, false);
1758ffdff6aSGreg Kroah-Hartman
1768ffdff6aSGreg Kroah-Hartman /*
1778ffdff6aSGreg Kroah-Hartman * Digital input change of state interrupts are optionally supported
1788ffdff6aSGreg Kroah-Hartman * using IRQ 2-7, 10-12, 14, or 15.
1798ffdff6aSGreg Kroah-Hartman */
1808ffdff6aSGreg Kroah-Hartman if ((1 << it->options[1]) & 0xdcfc) {
1818ffdff6aSGreg Kroah-Hartman ret = request_irq(it->options[1], aio_iiro_16_cos, 0,
1828ffdff6aSGreg Kroah-Hartman dev->board_name, dev);
1838ffdff6aSGreg Kroah-Hartman if (ret == 0)
1848ffdff6aSGreg Kroah-Hartman dev->irq = it->options[1];
1858ffdff6aSGreg Kroah-Hartman }
1868ffdff6aSGreg Kroah-Hartman
1878ffdff6aSGreg Kroah-Hartman ret = comedi_alloc_subdevices(dev, 2);
1888ffdff6aSGreg Kroah-Hartman if (ret)
1898ffdff6aSGreg Kroah-Hartman return ret;
1908ffdff6aSGreg Kroah-Hartman
1918ffdff6aSGreg Kroah-Hartman /* Digital Output subdevice */
1928ffdff6aSGreg Kroah-Hartman s = &dev->subdevices[0];
1938ffdff6aSGreg Kroah-Hartman s->type = COMEDI_SUBD_DO;
1948ffdff6aSGreg Kroah-Hartman s->subdev_flags = SDF_WRITABLE;
1958ffdff6aSGreg Kroah-Hartman s->n_chan = 16;
1968ffdff6aSGreg Kroah-Hartman s->maxdata = 1;
1978ffdff6aSGreg Kroah-Hartman s->range_table = &range_digital;
1988ffdff6aSGreg Kroah-Hartman s->insn_bits = aio_iiro_16_do_insn_bits;
1998ffdff6aSGreg Kroah-Hartman
2008ffdff6aSGreg Kroah-Hartman /* get the initial state of the relays */
2018ffdff6aSGreg Kroah-Hartman s->state = inb(dev->iobase + AIO_IIRO_16_RELAY_0_7) |
2028ffdff6aSGreg Kroah-Hartman (inb(dev->iobase + AIO_IIRO_16_RELAY_8_15) << 8);
2038ffdff6aSGreg Kroah-Hartman
2048ffdff6aSGreg Kroah-Hartman /* Digital Input subdevice */
2058ffdff6aSGreg Kroah-Hartman s = &dev->subdevices[1];
2068ffdff6aSGreg Kroah-Hartman s->type = COMEDI_SUBD_DI;
2078ffdff6aSGreg Kroah-Hartman s->subdev_flags = SDF_READABLE;
2088ffdff6aSGreg Kroah-Hartman s->n_chan = 16;
2098ffdff6aSGreg Kroah-Hartman s->maxdata = 1;
2108ffdff6aSGreg Kroah-Hartman s->range_table = &range_digital;
2118ffdff6aSGreg Kroah-Hartman s->insn_bits = aio_iiro_16_di_insn_bits;
2128ffdff6aSGreg Kroah-Hartman if (dev->irq) {
2138ffdff6aSGreg Kroah-Hartman dev->read_subdev = s;
2148ffdff6aSGreg Kroah-Hartman s->subdev_flags |= SDF_CMD_READ | SDF_LSAMPL;
2158ffdff6aSGreg Kroah-Hartman s->len_chanlist = 1;
2168ffdff6aSGreg Kroah-Hartman s->do_cmdtest = aio_iiro_16_cos_cmdtest;
2178ffdff6aSGreg Kroah-Hartman s->do_cmd = aio_iiro_16_cos_cmd;
2188ffdff6aSGreg Kroah-Hartman s->cancel = aio_iiro_16_cos_cancel;
2198ffdff6aSGreg Kroah-Hartman }
2208ffdff6aSGreg Kroah-Hartman
2218ffdff6aSGreg Kroah-Hartman return 0;
2228ffdff6aSGreg Kroah-Hartman }
2238ffdff6aSGreg Kroah-Hartman
2248ffdff6aSGreg Kroah-Hartman static struct comedi_driver aio_iiro_16_driver = {
2258ffdff6aSGreg Kroah-Hartman .driver_name = "aio_iiro_16",
2268ffdff6aSGreg Kroah-Hartman .module = THIS_MODULE,
2278ffdff6aSGreg Kroah-Hartman .attach = aio_iiro_16_attach,
2288ffdff6aSGreg Kroah-Hartman .detach = comedi_legacy_detach,
2298ffdff6aSGreg Kroah-Hartman };
2308ffdff6aSGreg Kroah-Hartman module_comedi_driver(aio_iiro_16_driver);
2318ffdff6aSGreg Kroah-Hartman
2328ffdff6aSGreg Kroah-Hartman MODULE_AUTHOR("Comedi https://www.comedi.org");
2338ffdff6aSGreg Kroah-Hartman MODULE_DESCRIPTION("Comedi driver for Access I/O Products 104-IIRO-16 board");
2348ffdff6aSGreg Kroah-Hartman MODULE_LICENSE("GPL");
235