[linux-2.6-block.git] / drivers / staging / comedi / drivers / aio_iiro_16.c

/*
 * aio_iiro_16.c
 * Comedi driver for Access I/O Products 104-IIRO-16 board
 * Copyright (C) 2006 C&C Technologies, Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

/*
 * Driver: aio_iiro_16
 * Description: Access I/O Products PC/104 Isolated Input/Relay Output Board
 * Author: Zachary Ware <zach.ware@cctechnol.com>
 * Devices: [Access I/O] 104-IIRO-16 (aio_iiro_16)
 * Status: experimental
 *
 * Configuration Options:
 *   [0] - I/O port base address
 *   [1] - IRQ (optional)
 *
 * The board supports interrupts on change of state of the digital inputs.
 * The sample data returned by the async command indicates which inputs
 * changed state and the current state of the inputs:
 *
 *	Bit 23 - IRQ Enable (1) / Disable (0)
 *	Bit 17 - Input 8-15 Changed State (1 = Changed, 0 = No Change)
 *	Bit 16 - Input 0-7 Changed State (1 = Changed, 0 = No Change)
 *	Bit 15 - Digital input 15
 *	...
 *	Bit 0  - Digital input 0
 */

#include <linux/module.h>
#include <linux/interrupt.h>

#include "../comedidev.h"

#define AIO_IIRO_16_RELAY_0_7		0x00
#define AIO_IIRO_16_INPUT_0_7		0x01
#define AIO_IIRO_16_IRQ			0x02
#define AIO_IIRO_16_RELAY_8_15		0x04
#define AIO_IIRO_16_INPUT_8_15		0x05
#define AIO_IIRO_16_STATUS		0x07
#define AIO_IIRO_16_STATUS_IRQE		BIT(7)
#define AIO_IIRO_16_STATUS_INPUT_8_15	BIT(1)
#define AIO_IIRO_16_STATUS_INPUT_0_7	BIT(0)

static unsigned int aio_iiro_16_read_inputs(struct comedi_device *dev)
{
	unsigned int val;

	val = inb(dev->iobase + AIO_IIRO_16_INPUT_0_7);
	val |= inb(dev->iobase + AIO_IIRO_16_INPUT_8_15) << 8;

	return val;
}

static irqreturn_t aio_iiro_16_cos(int irq, void *d)
{
	struct comedi_device *dev = d;
	struct comedi_subdevice *s = dev->read_subdev;
	unsigned int status;
	unsigned int val;

	status = inb(dev->iobase + AIO_IIRO_16_STATUS);
	if (!(status & AIO_IIRO_16_STATUS_IRQE))
		return IRQ_NONE;

	val = aio_iiro_16_read_inputs(dev);
	val |= (status << 16);

	comedi_buf_write_samples(s, &val, 1);
	comedi_handle_events(dev, s);

	return IRQ_HANDLED;
}

static void aio_iiro_enable_irq(struct comedi_device *dev, bool enable)
{
	if (enable)
		inb(dev->iobase + AIO_IIRO_16_IRQ);
	else
		outb(0, dev->iobase + AIO_IIRO_16_IRQ);
}

static int aio_iiro_16_cos_cancel(struct comedi_device *dev,
				  struct comedi_subdevice *s)
{
	aio_iiro_enable_irq(dev, false);

	return 0;
}

static int aio_iiro_16_cos_cmd(struct comedi_device *dev,
			       struct comedi_subdevice *s)
{
	aio_iiro_enable_irq(dev, true);

	return 0;
}

static int aio_iiro_16_cos_cmdtest(struct comedi_device *dev,
				   struct comedi_subdevice *s,
				   struct comedi_cmd *cmd)
{
	int err = 0;

	/* Step 1 : check if triggers are trivially valid */

	err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW);
	err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_EXT);
	err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_FOLLOW);
	err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
	err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_NONE);

	if (err)
		return 1;

	/* Step 2a : make sure trigger sources are unique */
	/* Step 2b : and mutually compatible */

	/* Step 3: check if arguments are trivially valid */

	err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
	err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
	err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0);
	err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
					   cmd->chanlist_len);
	err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);

	if (err)
		return 3;

	/* Step 4: fix up any arguments */

	/* Step 5: check channel list if it exists */

	return 0;
}

static int aio_iiro_16_do_insn_bits(struct comedi_device *dev,
				    struct comedi_subdevice *s,
				    struct comedi_insn *insn,
				    unsigned int *data)
{
	if (comedi_dio_update_state(s, data)) {
		outb(s->state & 0xff, dev->iobase + AIO_IIRO_16_RELAY_0_7);
		outb((s->state >> 8) & 0xff,
		     dev->iobase + AIO_IIRO_16_RELAY_8_15);
	}

	data[1] = s->state;

	return insn->n;
}

static int aio_iiro_16_di_insn_bits(struct comedi_device *dev,
				    struct comedi_subdevice *s,
				    struct comedi_insn *insn,
				    unsigned int *data)
{
	data[1] = aio_iiro_16_read_inputs(dev);

	return insn->n;
}

static int aio_iiro_16_attach(struct comedi_device *dev,
			      struct comedi_devconfig *it)
{
	struct comedi_subdevice *s;
	int ret;

	ret = comedi_request_region(dev, it->options[0], 0x8);
	if (ret)
		return ret;

	aio_iiro_enable_irq(dev, false);

	/*
	 * Digital input change of state interrupts are optionally supported
	 * using IRQ 2-7, 10-12, 14, or 15.
	 */
	if ((1 << it->options[1]) & 0xdcfc) {
		ret = request_irq(it->options[1], aio_iiro_16_cos, 0,
				  dev->board_name, dev);
		if (ret == 0)
			dev->irq = it->options[1];
	}

	ret = comedi_alloc_subdevices(dev, 2);
	if (ret)
		return ret;

	/* Digital Output subdevice */
	s = &dev->subdevices[0];
	s->type		= COMEDI_SUBD_DO;
	s->subdev_flags	= SDF_WRITABLE;
	s->n_chan	= 16;
	s->maxdata	= 1;
	s->range_table	= &range_digital;
	s->insn_bits	= aio_iiro_16_do_insn_bits;

	/* get the initial state of the relays */
	s->state = inb(dev->iobase + AIO_IIRO_16_RELAY_0_7) |
		   (inb(dev->iobase + AIO_IIRO_16_RELAY_8_15) << 8);

	/* Digital Input subdevice */
	s = &dev->subdevices[1];
	s->type		= COMEDI_SUBD_DI;
	s->subdev_flags	= SDF_READABLE;
	s->n_chan	= 16;
	s->maxdata	= 1;
	s->range_table	= &range_digital;
	s->insn_bits	= aio_iiro_16_di_insn_bits;
	if (dev->irq) {
		dev->read_subdev = s;
		s->subdev_flags	|= SDF_CMD_READ | SDF_LSAMPL;
		s->len_chanlist	= 1;
		s->do_cmdtest	= aio_iiro_16_cos_cmdtest;
		s->do_cmd	= aio_iiro_16_cos_cmd;
		s->cancel	= aio_iiro_16_cos_cancel;
	}

	return 0;
}

static struct comedi_driver aio_iiro_16_driver = {
	.driver_name	= "aio_iiro_16",
	.module		= THIS_MODULE,
	.attach		= aio_iiro_16_attach,
	.detach		= comedi_legacy_detach,
};
module_comedi_driver(aio_iiro_16_driver);

MODULE_AUTHOR("Comedi http://www.comedi.org");
MODULE_DESCRIPTION("Comedi driver for Access I/O Products 104-IIRO-16 board");
MODULE_LICENSE("GPL");
Commit	Line	Data
56af390d	1	/*
9cdb432c HS	2	* aio_iiro_16.c
	3	* Comedi driver for Access I/O Products 104-IIRO-16 board
	4	* Copyright (C) 2006 C&C Technologies, Inc.
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*/
56af390d ZW	16
56af390d ZW	17	/*
9cdb432c HS	18	* Driver: aio_iiro_16
	19	* Description: Access I/O Products PC/104 Isolated Input/Relay Output Board
	20	* Author: Zachary Ware <zach.ware@cctechnol.com>
	21	* Devices: [Access I/O] 104-IIRO-16 (aio_iiro_16)
	22	* Status: experimental
	23	*
	24	* Configuration Options:
	25	* [0] - I/O port base address
ad7a370c HS	26	* [1] - IRQ (optional)
	27	*
	28	* The board supports interrupts on change of state of the digital inputs.
	29	* The sample data returned by the async command indicates which inputs
53c0bee8	30	* changed state and the current state of the inputs:
ad7a370c	31	*
53c0bee8 HS	32	* Bit 23 - IRQ Enable (1) / Disable (0)
	33	* Bit 17 - Input 8-15 Changed State (1 = Changed, 0 = No Change)
	34	* Bit 16 - Input 0-7 Changed State (1 = Changed, 0 = No Change)
	35	* Bit 15 - Digital input 15
	36	* ...
	37	* Bit 0 - Digital input 0
9cdb432c	38	*/
56af390d	39
ce157f80	40	#include <linux/module.h>
ad7a370c HS	41	#include <linux/interrupt.h>
ad7a370c HS	42
56af390d	43	#include "../comedidev.h"
56af390d	44
ad7a370c HS	45	#define AIO_IIRO_16_RELAY_0_7 0x00
	46	#define AIO_IIRO_16_INPUT_0_7 0x01
	47	#define AIO_IIRO_16_IRQ 0x02
	48	#define AIO_IIRO_16_RELAY_8_15 0x04
	49	#define AIO_IIRO_16_INPUT_8_15 0x05
	50	#define AIO_IIRO_16_STATUS 0x07
	51	#define AIO_IIRO_16_STATUS_IRQE BIT(7)
	52	#define AIO_IIRO_16_STATUS_INPUT_8_15 BIT(1)
	53	#define AIO_IIRO_16_STATUS_INPUT_0_7 BIT(0)
	54
53c0bee8 HS	55	static unsigned int aio_iiro_16_read_inputs(struct comedi_device *dev)
	56	{
	57	unsigned int val;
	58
	59	val = inb(dev->iobase + AIO_IIRO_16_INPUT_0_7);
	60	val \|= inb(dev->iobase + AIO_IIRO_16_INPUT_8_15) << 8;
	61
	62	return val;
	63	}
	64
ad7a370c HS	65	static irqreturn_t aio_iiro_16_cos(int irq, void *d)
	66	{
	67	struct comedi_device *dev = d;
	68	struct comedi_subdevice *s = dev->read_subdev;
	69	unsigned int status;
53c0bee8	70	unsigned int val;
ad7a370c HS	71
	72	status = inb(dev->iobase + AIO_IIRO_16_STATUS);
	73	if (!(status & AIO_IIRO_16_STATUS_IRQE))
	74	return IRQ_NONE;
	75
53c0bee8 HS	76	val = aio_iiro_16_read_inputs(dev);
	77	val \|= (status << 16);
	78
	79	comedi_buf_write_samples(s, &val, 1);
ad7a370c HS	80	comedi_handle_events(dev, s);
	81
	82	return IRQ_HANDLED;
	83	}
56af390d	84
ffe1cb9a HS	85	static void aio_iiro_enable_irq(struct comedi_device *dev, bool enable)
	86	{
	87	if (enable)
	88	inb(dev->iobase + AIO_IIRO_16_IRQ);
	89	else
	90	outb(0, dev->iobase + AIO_IIRO_16_IRQ);
	91	}
	92
ad7a370c HS	93	static int aio_iiro_16_cos_cancel(struct comedi_device *dev,
	94	struct comedi_subdevice *s)
	95	{
	96	aio_iiro_enable_irq(dev, false);
	97
	98	return 0;
	99	}
	100
	101	static int aio_iiro_16_cos_cmd(struct comedi_device *dev,
	102	struct comedi_subdevice *s)
	103	{
	104	aio_iiro_enable_irq(dev, true);
	105
	106	return 0;
	107	}
	108
	109	static int aio_iiro_16_cos_cmdtest(struct comedi_device *dev,
	110	struct comedi_subdevice *s,
	111	struct comedi_cmd *cmd)
	112	{
	113	int err = 0;
	114
	115	/* Step 1 : check if triggers are trivially valid */
	116
f900aec9 IA	117	err \|= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW);
	118	err \|= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_EXT);
	119	err \|= comedi_check_trigger_src(&cmd->convert_src, TRIG_FOLLOW);
	120	err \|= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
	121	err \|= comedi_check_trigger_src(&cmd->stop_src, TRIG_NONE);
ad7a370c HS	122
	123	if (err)
	124	return 1;
	125
	126	/* Step 2a : make sure trigger sources are unique */
	127	/* Step 2b : and mutually compatible */
	128
	129	/* Step 3: check if arguments are trivially valid */
	130
f900aec9 IA	131	err \|= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
	132	err \|= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
	133	err \|= comedi_check_trigger_arg_is(&cmd->convert_arg, 0);
	134	err \|= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
	135	cmd->chanlist_len);
	136	err \|= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
ad7a370c HS	137
	138	if (err)
	139	return 3;
	140
	141	/* Step 4: fix up any arguments */
	142
	143	/* Step 5: check channel list if it exists */
	144
	145	return 0;
	146	}
	147
3b78602f HS	148	static int aio_iiro_16_do_insn_bits(struct comedi_device *dev,
	149	struct comedi_subdevice *s,
	150	struct comedi_insn *insn,
	151	unsigned int *data)
6f97a28d	152	{
97f4289a	153	if (comedi_dio_update_state(s, data)) {
6f97a28d HS	154	outb(s->state & 0xff, dev->iobase + AIO_IIRO_16_RELAY_0_7);
	155	outb((s->state >> 8) & 0xff,
	156	dev->iobase + AIO_IIRO_16_RELAY_8_15);
	157	}
56af390d	158
6f97a28d HS	159	data[1] = s->state;
6f97a28d HS	160
a2714e3e	161	return insn->n;
6f97a28d	162	}
56af390d	163
aba97d74 HS	164	static int aio_iiro_16_di_insn_bits(struct comedi_device *dev,
	165	struct comedi_subdevice *s,
	166	struct comedi_insn *insn,
	167	unsigned int *data)
6f97a28d	168	{
53c0bee8	169	data[1] = aio_iiro_16_read_inputs(dev);
6f97a28d	170
a2714e3e	171	return insn->n;
6f97a28d	172	}
56af390d	173
0a85b6f0 MT	174	static int aio_iiro_16_attach(struct comedi_device *dev,
0a85b6f0 MT	175	struct comedi_devconfig *it)
56af390d	176	{
34c43922	177	struct comedi_subdevice *s;
8b6c5694	178	int ret;
56af390d	179
862755ec	180	ret = comedi_request_region(dev, it->options[0], 0x8);
c8c90a73 HS	181	if (ret)
c8c90a73 HS	182	return ret;
56af390d	183
ffe1cb9a HS	184	aio_iiro_enable_irq(dev, false);
ffe1cb9a HS	185
ad7a370c HS	186	/*
	187	* Digital input change of state interrupts are optionally supported
	188	* using IRQ 2-7, 10-12, 14, or 15.
	189	*/
	190	if ((1 << it->options[1]) & 0xdcfc) {
	191	ret = request_irq(it->options[1], aio_iiro_16_cos, 0,
	192	dev->board_name, dev);
	193	if (ret == 0)
	194	dev->irq = it->options[1];
	195	}
	196
8b6c5694 HS	197	ret = comedi_alloc_subdevices(dev, 2);
	198	if (ret)
	199	return ret;
56af390d	200
0f0d2b1b	201	/* Digital Output subdevice */
40c4db8b	202	s = &dev->subdevices[0];
0f0d2b1b HS	203	s->type = COMEDI_SUBD_DO;
	204	s->subdev_flags = SDF_WRITABLE;
	205	s->n_chan = 16;
	206	s->maxdata = 1;
	207	s->range_table = &range_digital;
	208	s->insn_bits = aio_iiro_16_do_insn_bits;
	209
21f1801f HS	210	/* get the initial state of the relays */
	211	s->state = inb(dev->iobase + AIO_IIRO_16_RELAY_0_7) \|
	212	(inb(dev->iobase + AIO_IIRO_16_RELAY_8_15) << 8);
	213
0f0d2b1b	214	/* Digital Input subdevice */
40c4db8b	215	s = &dev->subdevices[1];
0f0d2b1b HS	216	s->type = COMEDI_SUBD_DI;
	217	s->subdev_flags = SDF_READABLE;
	218	s->n_chan = 16;
	219	s->maxdata = 1;
	220	s->range_table = &range_digital;
	221	s->insn_bits = aio_iiro_16_di_insn_bits;
ad7a370c HS	222	if (dev->irq) {
ad7a370c HS	223	dev->read_subdev = s;
53c0bee8	224	s->subdev_flags \|= SDF_CMD_READ \| SDF_LSAMPL;
ad7a370c HS	225	s->len_chanlist = 1;
	226	s->do_cmdtest = aio_iiro_16_cos_cmdtest;
	227	s->do_cmd = aio_iiro_16_cos_cmd;
	228	s->cancel = aio_iiro_16_cos_cancel;
	229	}
56af390d	230
fb780d21	231	return 0;
56af390d ZW	232	}
56af390d ZW	233
294f930d	234	static struct comedi_driver aio_iiro_16_driver = {
6f97a28d HS	235	.driver_name = "aio_iiro_16",
	236	.module = THIS_MODULE,
	237	.attach = aio_iiro_16_attach,
21208519	238	.detach = comedi_legacy_detach,
6f97a28d	239	};
294f930d	240	module_comedi_driver(aio_iiro_16_driver);
90f703d3 AT	241
90f703d3 AT	242	MODULE_AUTHOR("Comedi http://www.comedi.org");
a52355ee	243	MODULE_DESCRIPTION("Comedi driver for Access I/O Products 104-IIRO-16 board");
90f703d3	244	MODULE_LICENSE("GPL");