[deliverable/linux.git] / drivers / staging / comedi / drivers / pcm3724.c

/*
    comedi/drivers/pcm724.c

    Drew Csillag <drew_csillag@yahoo.com>

    hardware driver for Advantech card:
     card:   PCM-3724
     driver: pcm3724

    Options for PCM-3724
     [0] - IO Base
*/
/*
Driver: pcm3724
Description: Advantech PCM-3724
Author: Drew Csillag <drew_csillag@yahoo.com>
Devices: [Advantech] PCM-3724 (pcm724)
Status: tested

This is driver for digital I/O boards PCM-3724 with 48 DIO.
It needs 8255.o for operations and only immediate mode is supported.
See the source for configuration details.

Copy/pasted/hacked from pcm724.c
*/
/*
 * check_driver overrides:
 *   struct comedi_insn
 */

#include "../comedidev.h"

#include <linux/ioport.h>
#include <linux/delay.h>

#include "8255.h"

#define PCM3724_SIZE   16
#define SIZE_8255	4

#define BUF_C0 0x1
#define BUF_B0 0x2
#define BUF_A0 0x4
#define BUF_C1 0x8
#define BUF_B1 0x10
#define BUF_A1 0x20

#define GATE_A0 0x4
#define GATE_B0	0x2
#define GATE_C0	0x1
#define GATE_A1	0x20
#define GATE_B1	0x10
#define GATE_C1 0x8

/* from 8255.c */
#define CR_CW		0x80
#define _8255_CR 3
#define CR_B_IO		0x02
#define CR_B_MODE	0x04
#define CR_C_IO	        0x09
#define CR_A_IO		0x10
#define CR_A_MODE(a)	((a)<<5)
#define CR_CW		0x80

struct pcm3724_board {
	const char *name;	/*  driver name */
	int dio;		/*  num of DIO */
	int numofports;		/*  num of 8255 subdevices */
	unsigned int IRQbits;	/*  allowed interrupts */
	unsigned int io_range;	/*  len of IO space */
};

/* used to track configured dios */
struct priv_pcm3724 {
	int dio_1;
	int dio_2;
};

static int subdev_8255_cb(int dir, int port, int data, unsigned long arg)
{
	unsigned long iobase = arg;
	unsigned char inbres;
	/* printk("8255cb %d %d %d %lx\n", dir,port,data,arg); */
	if (dir) {
		/* printk("8255 cb   outb(%x, %lx)\n", data, iobase+port); */
		outb(data, iobase + port);
		return 0;
	} else {
		inbres = inb(iobase + port);
		/* printk("8255 cb   inb(%lx) = %x\n", iobase+port, inbres); */
		return inbres;
	}
}

static int compute_buffer(int config, int devno, struct comedi_subdevice *s)
{
	/* 1 in io_bits indicates output */
	if (s->io_bits & 0x0000ff) {
		if (devno == 0)
			config |= BUF_A0;
		else
			config |= BUF_A1;
	}
	if (s->io_bits & 0x00ff00) {
		if (devno == 0)
			config |= BUF_B0;
		else
			config |= BUF_B1;
	}
	if (s->io_bits & 0xff0000) {
		if (devno == 0)
			config |= BUF_C0;
		else
			config |= BUF_C1;
	}
	return config;
}

static void do_3724_config(struct comedi_device *dev,
			   struct comedi_subdevice *s, int chanspec)
{
	int config;
	int buffer_config;
	unsigned long port_8255_cfg;

	config = CR_CW;
	buffer_config = 0;

	/* 1 in io_bits indicates output, 1 in config indicates input */
	if (!(s->io_bits & 0x0000ff))
		config |= CR_A_IO;

	if (!(s->io_bits & 0x00ff00))
		config |= CR_B_IO;

	if (!(s->io_bits & 0xff0000))
		config |= CR_C_IO;

	buffer_config = compute_buffer(0, 0, dev->subdevices);
	buffer_config = compute_buffer(buffer_config, 1, (dev->subdevices) + 1);

	if (s == dev->subdevices)
		port_8255_cfg = dev->iobase + _8255_CR;
	else
		port_8255_cfg = dev->iobase + SIZE_8255 + _8255_CR;

	outb(buffer_config, dev->iobase + 8);	/* update buffer register */
	/* printk("pcm3724 buffer_config (%lx) %d, %x\n",
	       dev->iobase + _8255_CR, chanspec, buffer_config); */

	outb(config, port_8255_cfg);
}

static void enable_chan(struct comedi_device *dev, struct comedi_subdevice *s,
			int chanspec)
{
	unsigned int mask;
	int gatecfg;
	struct priv_pcm3724 *priv;

	gatecfg = 0;
	priv = dev->private;

	mask = 1 << CR_CHAN(chanspec);
	if (s == dev->subdevices)	/*  subdev 0 */
		priv->dio_1 |= mask;
	else		/* subdev 1 */
		priv->dio_2 |= mask;

	if (priv->dio_1 & 0xff0000)
		gatecfg |= GATE_C0;

	if (priv->dio_1 & 0xff00)
		gatecfg |= GATE_B0;

	if (priv->dio_1 & 0xff)
		gatecfg |= GATE_A0;

	if (priv->dio_2 & 0xff0000)
		gatecfg |= GATE_C1;

	if (priv->dio_2 & 0xff00)
		gatecfg |= GATE_B1;

	if (priv->dio_2 & 0xff)
		gatecfg |= GATE_A1;

	/*       printk("gate control %x\n", gatecfg); */
	outb(gatecfg, dev->iobase + 9);
}

/* overriding the 8255 insn config */
static int subdev_3724_insn_config(struct comedi_device *dev,
				   struct comedi_subdevice *s,
				   struct comedi_insn *insn, unsigned int *data)
{
	unsigned int mask;
	unsigned int bits;

	mask = 1 << CR_CHAN(insn->chanspec);
	if (mask & 0x0000ff)
		bits = 0x0000ff;
	else if (mask & 0x00ff00)
		bits = 0x00ff00;
	else if (mask & 0x0f0000)
		bits = 0x0f0000;
	else
		bits = 0xf00000;

	switch (data[0]) {
	case INSN_CONFIG_DIO_INPUT:
		s->io_bits &= ~bits;
		break;
	case INSN_CONFIG_DIO_OUTPUT:
		s->io_bits |= bits;
		break;
	case INSN_CONFIG_DIO_QUERY:
		data[1] = (s->io_bits & bits) ? COMEDI_OUTPUT : COMEDI_INPUT;
		return insn->n;
		break;
	default:
		return -EINVAL;
	}

	do_3724_config(dev, s, insn->chanspec);
	enable_chan(dev, s, insn->chanspec);
	return 1;
}

static int pcm3724_attach(struct comedi_device *dev,
			  struct comedi_devconfig *it)
{
	const struct pcm3724_board *board = comedi_board(dev);
	unsigned long iobase;
	unsigned int iorange;
	int ret, i, n_subdevices;

	iobase = it->options[0];
	iorange = board->io_range;

	ret = alloc_private(dev, sizeof(struct priv_pcm3724));
	if (ret < 0)
		return -ENOMEM;

	((struct priv_pcm3724 *)(dev->private))->dio_1 = 0;
	((struct priv_pcm3724 *)(dev->private))->dio_2 = 0;

	printk(KERN_INFO "comedi%d: pcm3724: board=%s, 0x%03lx ", dev->minor,
	       board->name, iobase);
	if (!iobase || !request_region(iobase, iorange, "pcm3724")) {
		printk("I/O port conflict\n");
		return -EIO;
	}

	dev->iobase = iobase;
	dev->board_name = board->name;
	printk(KERN_INFO "\n");

	n_subdevices = board->numofports;

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

	for (i = 0; i < dev->n_subdevices; i++) {
		subdev_8255_init(dev, dev->subdevices + i, subdev_8255_cb,
				 (unsigned long)(dev->iobase + SIZE_8255 * i));
		((dev->subdevices) + i)->insn_config = subdev_3724_insn_config;
	}
	return 0;
}

static void pcm3724_detach(struct comedi_device *dev)
{
	const struct pcm3724_board *board = comedi_board(dev);
	int i;

	if (dev->subdevices) {
		for (i = 0; i < dev->n_subdevices; i++)
			subdev_8255_cleanup(dev, dev->subdevices + i);
	}
	if (dev->iobase)
		release_region(dev->iobase, board->io_range);
}

static const struct pcm3724_board boardtypes[] = {
	{ "pcm3724", 48, 2, 0x00fc, PCM3724_SIZE, },
};

static struct comedi_driver pcm3724_driver = {
	.driver_name	= "pcm3724",
	.module		= THIS_MODULE,
	.attach		= pcm3724_attach,
	.detach		= pcm3724_detach,
	.board_name	= &boardtypes[0].name,
	.num_names	= ARRAY_SIZE(boardtypes),
	.offset		= sizeof(struct pcm3724_board),
};
module_comedi_driver(pcm3724_driver);

MODULE_AUTHOR("Comedi http://www.comedi.org");
MODULE_DESCRIPTION("Comedi low-level driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
e30ec011 DC	1	/*
	2	comedi/drivers/pcm724.c
	3
	4	Drew Csillag <drew_csillag@yahoo.com>
	5
	6	hardware driver for Advantech card:
	7	card: PCM-3724
	8	driver: pcm3724
	9
	10	Options for PCM-3724
	11	[0] - IO Base
	12	*/
	13	/*
	14	Driver: pcm3724
	15	Description: Advantech PCM-3724
	16	Author: Drew Csillag <drew_csillag@yahoo.com>
	17	Devices: [Advantech] PCM-3724 (pcm724)
	18	Status: tested
	19
	20	This is driver for digital I/O boards PCM-3724 with 48 DIO.
	21	It needs 8255.o for operations and only immediate mode is supported.
	22	See the source for configuration details.
	23
	24	Copy/pasted/hacked from pcm724.c
	25	*/
	26	/*
	27	* check_driver overrides:
90035c08	28	* struct comedi_insn
e30ec011 DC	29	*/
	30
	31	#include "../comedidev.h"
	32
	33	#include <linux/ioport.h>
	34	#include <linux/delay.h>
	35
	36	#include "8255.h"
	37
	38	#define PCM3724_SIZE 16
	39	#define SIZE_8255 4
	40
	41	#define BUF_C0 0x1
	42	#define BUF_B0 0x2
	43	#define BUF_A0 0x4
	44	#define BUF_C1 0x8
	45	#define BUF_B1 0x10
	46	#define BUF_A1 0x20
	47
	48	#define GATE_A0 0x4
	49	#define GATE_B0 0x2
	50	#define GATE_C0 0x1
	51	#define GATE_A1 0x20
	52	#define GATE_B1 0x10
	53	#define GATE_C1 0x8
	54
	55	/* from 8255.c */
	56	#define CR_CW 0x80
	57	#define _8255_CR 3
	58	#define CR_B_IO 0x02
	59	#define CR_B_MODE 0x04
	60	#define CR_C_IO 0x09
	61	#define CR_A_IO 0x10
	62	#define CR_A_MODE(a) ((a)<<5)
	63	#define CR_CW 0x80
	64
180089a8	65	struct pcm3724_board {
2696fb57 BP	66	const char name; / driver name */
	67	int dio; /* num of DIO */
	68	int numofports; /* num of 8255 subdevices */
	69	unsigned int IRQbits; /* allowed interrupts */
	70	unsigned int io_range; /* len of IO space */
180089a8	71	};
e30ec011	72
2696fb57	73	/* used to track configured dios */
8e7b864b	74	struct priv_pcm3724 {
e30ec011 DC	75	int dio_1;
e30ec011 DC	76	int dio_2;
8e7b864b BP	77	};
8e7b864b BP	78
e30ec011 DC	79	static int subdev_8255_cb(int dir, int port, int data, unsigned long arg)
	80	{
	81	unsigned long iobase = arg;
	82	unsigned char inbres;
2696fb57	83	/* printk("8255cb %d %d %d %lx\n", dir,port,data,arg); */
e30ec011	84	if (dir) {
2696fb57	85	/* printk("8255 cb outb(%x, %lx)\n", data, iobase+port); */
e30ec011 DC	86	outb(data, iobase + port);
	87	return 0;
	88	} else {
	89	inbres = inb(iobase + port);
2696fb57	90	/* printk("8255 cb inb(%lx) = %x\n", iobase+port, inbres); */
e30ec011 DC	91	return inbres;
	92	}
	93	}
	94
da91b269	95	static int compute_buffer(int config, int devno, struct comedi_subdevice *s)
e30ec011 DC	96	{
	97	/* 1 in io_bits indicates output */
	98	if (s->io_bits & 0x0000ff) {
50ae2a52	99	if (devno == 0)
e30ec011	100	config \|= BUF_A0;
50ae2a52	101	else
e30ec011	102	config \|= BUF_A1;
e30ec011 DC	103	}
e30ec011 DC	104	if (s->io_bits & 0x00ff00) {
50ae2a52	105	if (devno == 0)
e30ec011	106	config \|= BUF_B0;
50ae2a52	107	else
e30ec011	108	config \|= BUF_B1;
e30ec011 DC	109	}
e30ec011 DC	110	if (s->io_bits & 0xff0000) {
50ae2a52	111	if (devno == 0)
e30ec011	112	config \|= BUF_C0;
50ae2a52	113	else
e30ec011	114	config \|= BUF_C1;
e30ec011 DC	115	}
	116	return config;
	117	}
	118
0a85b6f0 MT	119	static void do_3724_config(struct comedi_device *dev,
0a85b6f0 MT	120	struct comedi_subdevice *s, int chanspec)
e30ec011 DC	121	{
	122	int config;
	123	int buffer_config;
	124	unsigned long port_8255_cfg;
	125
	126	config = CR_CW;
	127	buffer_config = 0;
	128
	129	/* 1 in io_bits indicates output, 1 in config indicates input */
50ae2a52	130	if (!(s->io_bits & 0x0000ff))
e30ec011	131	config \|= CR_A_IO;
50ae2a52 BA	132
50ae2a52 BA	133	if (!(s->io_bits & 0x00ff00))
e30ec011	134	config \|= CR_B_IO;
50ae2a52 BA	135
50ae2a52 BA	136	if (!(s->io_bits & 0xff0000))
e30ec011	137	config \|= CR_C_IO;
e30ec011 DC	138
	139	buffer_config = compute_buffer(0, 0, dev->subdevices);
	140	buffer_config = compute_buffer(buffer_config, 1, (dev->subdevices) + 1);
	141
50ae2a52	142	if (s == dev->subdevices)
e30ec011	143	port_8255_cfg = dev->iobase + _8255_CR;
50ae2a52	144	else
e30ec011	145	port_8255_cfg = dev->iobase + SIZE_8255 + _8255_CR;
50ae2a52	146
e30ec011	147	outb(buffer_config, dev->iobase + 8); /* update buffer register */
50ae2a52 BA	148	/* printk("pcm3724 buffer_config (%lx) %d, %x\n",
	149	dev->iobase + _8255_CR, chanspec, buffer_config); */
	150
e30ec011 DC	151	outb(config, port_8255_cfg);
	152	}
	153
0a85b6f0 MT	154	static void enable_chan(struct comedi_device dev, struct comedi_subdevice s,
0a85b6f0 MT	155	int chanspec)
e30ec011 DC	156	{
	157	unsigned int mask;
	158	int gatecfg;
8e7b864b	159	struct priv_pcm3724 *priv;
e30ec011 DC	160
e30ec011 DC	161	gatecfg = 0;
440a6547	162	priv = dev->private;
e30ec011 DC	163
e30ec011 DC	164	mask = 1 << CR_CHAN(chanspec);
50ae2a52	165	if (s == dev->subdevices) /* subdev 0 */
e30ec011	166	priv->dio_1 \|= mask;
50ae2a52	167	else /* subdev 1 */
e30ec011	168	priv->dio_2 \|= mask;
50ae2a52 BA	169
50ae2a52 BA	170	if (priv->dio_1 & 0xff0000)
e30ec011	171	gatecfg \|= GATE_C0;
50ae2a52 BA	172
50ae2a52 BA	173	if (priv->dio_1 & 0xff00)
e30ec011	174	gatecfg \|= GATE_B0;
50ae2a52 BA	175
50ae2a52 BA	176	if (priv->dio_1 & 0xff)
e30ec011	177	gatecfg \|= GATE_A0;
50ae2a52 BA	178
50ae2a52 BA	179	if (priv->dio_2 & 0xff0000)
e30ec011	180	gatecfg \|= GATE_C1;
50ae2a52 BA	181
50ae2a52 BA	182	if (priv->dio_2 & 0xff00)
e30ec011	183	gatecfg \|= GATE_B1;
50ae2a52 BA	184
50ae2a52 BA	185	if (priv->dio_2 & 0xff)
e30ec011	186	gatecfg \|= GATE_A1;
50ae2a52	187
2696fb57	188	/* printk("gate control %x\n", gatecfg); */
e30ec011 DC	189	outb(gatecfg, dev->iobase + 9);
	190	}
	191
	192	/* overriding the 8255 insn config */
0a85b6f0 MT	193	static int subdev_3724_insn_config(struct comedi_device *dev,
	194	struct comedi_subdevice *s,
	195	struct comedi_insn insn, unsigned int data)
e30ec011 DC	196	{
	197	unsigned int mask;
	198	unsigned int bits;
	199
	200	mask = 1 << CR_CHAN(insn->chanspec);
50ae2a52	201	if (mask & 0x0000ff)
e30ec011	202	bits = 0x0000ff;
50ae2a52	203	else if (mask & 0x00ff00)
e30ec011	204	bits = 0x00ff00;
50ae2a52	205	else if (mask & 0x0f0000)
e30ec011	206	bits = 0x0f0000;
50ae2a52	207	else
e30ec011	208	bits = 0xf00000;
e30ec011 DC	209
	210	switch (data[0]) {
	211	case INSN_CONFIG_DIO_INPUT:
	212	s->io_bits &= ~bits;
	213	break;
	214	case INSN_CONFIG_DIO_OUTPUT:
	215	s->io_bits \|= bits;
	216	break;
	217	case INSN_CONFIG_DIO_QUERY:
	218	data[1] = (s->io_bits & bits) ? COMEDI_OUTPUT : COMEDI_INPUT;
	219	return insn->n;
	220	break;
	221	default:
	222	return -EINVAL;
	223	}
	224
	225	do_3724_config(dev, s, insn->chanspec);
	226	enable_chan(dev, s, insn->chanspec);
	227	return 1;
	228	}
	229
0a85b6f0 MT	230	static int pcm3724_attach(struct comedi_device *dev,
0a85b6f0 MT	231	struct comedi_devconfig *it)
e30ec011	232	{
3cff0f12	233	const struct pcm3724_board *board = comedi_board(dev);
e30ec011 DC	234	unsigned long iobase;
	235	unsigned int iorange;
	236	int ret, i, n_subdevices;
	237
	238	iobase = it->options[0];
3cff0f12	239	iorange = board->io_range;
c3744138 BP	240
	241	ret = alloc_private(dev, sizeof(struct priv_pcm3724));
	242	if (ret < 0)
e30ec011 DC	243	return -ENOMEM;
e30ec011 DC	244
0a85b6f0 MT	245	((struct priv_pcm3724 *)(dev->private))->dio_1 = 0;
0a85b6f0 MT	246	((struct priv_pcm3724 *)(dev->private))->dio_2 = 0;
e30ec011	247
50ae2a52	248	printk(KERN_INFO "comedi%d: pcm3724: board=%s, 0x%03lx ", dev->minor,
3cff0f12	249	board->name, iobase);
e30ec011 DC	250	if (!iobase \|\| !request_region(iobase, iorange, "pcm3724")) {
	251	printk("I/O port conflict\n");
	252	return -EIO;
	253	}
	254
	255	dev->iobase = iobase;
3cff0f12	256	dev->board_name = board->name;
50ae2a52	257	printk(KERN_INFO "\n");
e30ec011	258
3cff0f12	259	n_subdevices = board->numofports;
e30ec011	260
2f0b9d08	261	ret = comedi_alloc_subdevices(dev, n_subdevices);
8b6c5694	262	if (ret)
e30ec011 DC	263	return ret;
	264
	265	for (i = 0; i < dev->n_subdevices; i++) {
	266	subdev_8255_init(dev, dev->subdevices + i, subdev_8255_cb,
0a85b6f0	267	(unsigned long)(dev->iobase + SIZE_8255 * i));
e30ec011	268	((dev->subdevices) + i)->insn_config = subdev_3724_insn_config;
273f4bef	269	}
e30ec011 DC	270	return 0;
	271	}
	272
484ecc95	273	static void pcm3724_detach(struct comedi_device *dev)
e30ec011	274	{
3cff0f12	275	const struct pcm3724_board *board = comedi_board(dev);
e30ec011 DC	276	int i;
	277
	278	if (dev->subdevices) {
50ae2a52	279	for (i = 0; i < dev->n_subdevices; i++)
e30ec011	280	subdev_8255_cleanup(dev, dev->subdevices + i);
e30ec011	281	}
50ae2a52	282	if (dev->iobase)
3cff0f12	283	release_region(dev->iobase, board->io_range);
e30ec011	284	}
90f703d3	285
5f01bd51 HS	286	static const struct pcm3724_board boardtypes[] = {
	287	{ "pcm3724", 48, 2, 0x00fc, PCM3724_SIZE, },
	288	};
	289
294f930d	290	static struct comedi_driver pcm3724_driver = {
5f01bd51 HS	291	.driver_name = "pcm3724",
	292	.module = THIS_MODULE,
	293	.attach = pcm3724_attach,
	294	.detach = pcm3724_detach,
	295	.board_name = &boardtypes[0].name,
	296	.num_names = ARRAY_SIZE(boardtypes),
	297	.offset = sizeof(struct pcm3724_board),
	298	};
294f930d	299	module_comedi_driver(pcm3724_driver);
5f01bd51	300
90f703d3 AT	301	MODULE_AUTHOR("Comedi http://www.comedi.org");
	302	MODULE_DESCRIPTION("Comedi low-level driver");
	303	MODULE_LICENSE("GPL");