[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

static int pcm3724_attach(struct comedi_device *dev, struct comedi_devconfig *it);
static int pcm3724_detach(struct comedi_device *dev);

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

#define n_boardtypes (sizeof(boardtypes)/sizeof(struct pcm3724_board))
#define this_board ((const struct pcm3724_board *)dev->board_ptr)

static struct comedi_driver driver_pcm3724 = {
	.driver_name = "pcm3724",
	.module = THIS_MODULE,
	.attach = pcm3724_attach,
	.detach = pcm3724_detach,
	.board_name = &boardtypes[0].name,
	.num_names = n_boardtypes,
	.offset = sizeof(struct pcm3724_board),
};

COMEDI_INITCLEANUP(driver_pcm3724);

/* (setq c-basic-offset 8) */

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 = (struct priv_pcm3724 *) (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)
{
	unsigned long iobase;
	unsigned int iorange;
	int ret, i, n_subdevices;

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

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

	n_subdevices = this_board->numofports;

	ret = alloc_subdevices(dev, n_subdevices);
	if (ret < 0)
		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 int pcm3724_detach(struct comedi_device *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, this_board->io_range);
	}

	return 0;
}
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
da91b269 BP	65	static int pcm3724_attach(struct comedi_device dev, struct comedi_devconfig it);
da91b269 BP	66	static int pcm3724_detach(struct comedi_device *dev);
e30ec011	67
180089a8	68	struct pcm3724_board {
2696fb57 BP	69	const char name; / driver name */
	70	int dio; /* num of DIO */
	71	int numofports; /* num of 8255 subdevices */
	72	unsigned int IRQbits; /* allowed interrupts */
	73	unsigned int io_range; /* len of IO space */
180089a8	74	};
e30ec011	75
2696fb57	76	/* used to track configured dios */
8e7b864b	77	struct priv_pcm3724 {
e30ec011 DC	78	int dio_1;
e30ec011 DC	79	int dio_2;
8e7b864b BP	80	};
8e7b864b BP	81
180089a8	82	static const struct pcm3724_board boardtypes[] = {
e30ec011 DC	83	{"pcm3724", 48, 2, 0x00fc, PCM3724_SIZE,},
	84	};
	85
180089a8 BP	86	#define n_boardtypes (sizeof(boardtypes)/sizeof(struct pcm3724_board))
180089a8 BP	87	#define this_board ((const struct pcm3724_board *)dev->board_ptr)
e30ec011	88
139dfbdf	89	static struct comedi_driver driver_pcm3724 = {
68c3dbff BP	90	.driver_name = "pcm3724",
	91	.module = THIS_MODULE,
	92	.attach = pcm3724_attach,
	93	.detach = pcm3724_detach,
	94	.board_name = &boardtypes[0].name,
	95	.num_names = n_boardtypes,
	96	.offset = sizeof(struct pcm3724_board),
e30ec011 DC	97	};
	98
	99	COMEDI_INITCLEANUP(driver_pcm3724);
	100
2696fb57	101	/* (setq c-basic-offset 8) */
e30ec011 DC	102
	103	static int subdev_8255_cb(int dir, int port, int data, unsigned long arg)
	104	{
	105	unsigned long iobase = arg;
	106	unsigned char inbres;
2696fb57	107	/* printk("8255cb %d %d %d %lx\n", dir,port,data,arg); */
e30ec011	108	if (dir) {
2696fb57	109	/* printk("8255 cb outb(%x, %lx)\n", data, iobase+port); */
e30ec011 DC	110	outb(data, iobase + port);
	111	return 0;
	112	} else {
	113	inbres = inb(iobase + port);
2696fb57	114	/* printk("8255 cb inb(%lx) = %x\n", iobase+port, inbres); */
e30ec011 DC	115	return inbres;
	116	}
	117	}
	118
da91b269	119	static int compute_buffer(int config, int devno, struct comedi_subdevice *s)
e30ec011 DC	120	{
	121	/* 1 in io_bits indicates output */
	122	if (s->io_bits & 0x0000ff) {
	123	if (devno == 0) {
	124	config \|= BUF_A0;
	125	} else {
	126	config \|= BUF_A1;
	127	}
	128	}
	129	if (s->io_bits & 0x00ff00) {
	130	if (devno == 0) {
	131	config \|= BUF_B0;
	132	} else {
	133	config \|= BUF_B1;
	134	}
	135	}
	136	if (s->io_bits & 0xff0000) {
	137	if (devno == 0) {
	138	config \|= BUF_C0;
	139	} else {
	140	config \|= BUF_C1;
	141	}
	142	}
	143	return config;
	144	}
	145
da91b269	146	static void do_3724_config(struct comedi_device dev, struct comedi_subdevice s,
e30ec011 DC	147	int chanspec)
	148	{
	149	int config;
	150	int buffer_config;
	151	unsigned long port_8255_cfg;
	152
	153	config = CR_CW;
	154	buffer_config = 0;
	155
	156	/* 1 in io_bits indicates output, 1 in config indicates input */
	157	if (!(s->io_bits & 0x0000ff)) {
	158	config \|= CR_A_IO;
	159	}
	160	if (!(s->io_bits & 0x00ff00)) {
	161	config \|= CR_B_IO;
	162	}
	163	if (!(s->io_bits & 0xff0000)) {
	164	config \|= CR_C_IO;
	165	}
	166
	167	buffer_config = compute_buffer(0, 0, dev->subdevices);
	168	buffer_config = compute_buffer(buffer_config, 1, (dev->subdevices) + 1);
	169
	170	if (s == dev->subdevices) {
	171	port_8255_cfg = dev->iobase + _8255_CR;
	172	} else {
	173	port_8255_cfg = dev->iobase + SIZE_8255 + _8255_CR;
	174	}
	175	outb(buffer_config, dev->iobase + 8); /* update buffer register */
2696fb57	176	/* printk("pcm3724 buffer_config (%lx) %d, %x\n", dev->iobase + _8255_CR, chanspec, buffer_config); */
e30ec011 DC	177	outb(config, port_8255_cfg);
	178	}
	179
da91b269	180	static void enable_chan(struct comedi_device dev, struct comedi_subdevice s, int chanspec)
e30ec011 DC	181	{
	182	unsigned int mask;
	183	int gatecfg;
8e7b864b	184	struct priv_pcm3724 *priv;
e30ec011 DC	185
e30ec011 DC	186	gatecfg = 0;
8e7b864b	187	priv = (struct priv_pcm3724 *) (dev->private);
e30ec011 DC	188
e30ec011 DC	189	mask = 1 << CR_CHAN(chanspec);
2696fb57	190	if (s == dev->subdevices) { /* subdev 0 */
e30ec011	191	priv->dio_1 \|= mask;
2696fb57	192	} else { /* subdev 1 */
e30ec011 DC	193	priv->dio_2 \|= mask;
	194	}
	195	if (priv->dio_1 & 0xff0000) {
	196	gatecfg \|= GATE_C0;
	197	}
	198	if (priv->dio_1 & 0xff00) {
	199	gatecfg \|= GATE_B0;
	200	}
	201	if (priv->dio_1 & 0xff) {
	202	gatecfg \|= GATE_A0;
	203	}
	204	if (priv->dio_2 & 0xff0000) {
	205	gatecfg \|= GATE_C1;
	206	}
	207	if (priv->dio_2 & 0xff00) {
	208	gatecfg \|= GATE_B1;
	209	}
	210	if (priv->dio_2 & 0xff) {
	211	gatecfg \|= GATE_A1;
	212	}
2696fb57	213	/* printk("gate control %x\n", gatecfg); */
e30ec011 DC	214	outb(gatecfg, dev->iobase + 9);
	215	}
	216
	217	/* overriding the 8255 insn config */
da91b269 BP	218	static int subdev_3724_insn_config(struct comedi_device dev, struct comedi_subdevice s,
da91b269 BP	219	struct comedi_insn insn, unsigned int data)
e30ec011 DC	220	{
	221	unsigned int mask;
	222	unsigned int bits;
	223
	224	mask = 1 << CR_CHAN(insn->chanspec);
	225	if (mask & 0x0000ff) {
	226	bits = 0x0000ff;
	227	} else if (mask & 0x00ff00) {
	228	bits = 0x00ff00;
	229	} else if (mask & 0x0f0000) {
	230	bits = 0x0f0000;
	231	} else {
	232	bits = 0xf00000;
	233	}
	234
	235	switch (data[0]) {
	236	case INSN_CONFIG_DIO_INPUT:
	237	s->io_bits &= ~bits;
	238	break;
	239	case INSN_CONFIG_DIO_OUTPUT:
	240	s->io_bits \|= bits;
	241	break;
	242	case INSN_CONFIG_DIO_QUERY:
	243	data[1] = (s->io_bits & bits) ? COMEDI_OUTPUT : COMEDI_INPUT;
	244	return insn->n;
	245	break;
	246	default:
	247	return -EINVAL;
	248	}
	249
	250	do_3724_config(dev, s, insn->chanspec);
	251	enable_chan(dev, s, insn->chanspec);
	252	return 1;
	253	}
	254
da91b269	255	static int pcm3724_attach(struct comedi_device dev, struct comedi_devconfig it)
e30ec011 DC	256	{
	257	unsigned long iobase;
	258	unsigned int iorange;
	259	int ret, i, n_subdevices;
	260
	261	iobase = it->options[0];
	262	iorange = this_board->io_range;
c3744138 BP	263
	264	ret = alloc_private(dev, sizeof(struct priv_pcm3724));
	265	if (ret < 0)
e30ec011 DC	266	return -ENOMEM;
e30ec011 DC	267
8e7b864b BP	268	((struct priv_pcm3724 *) (dev->private))->dio_1 = 0;
8e7b864b BP	269	((struct priv_pcm3724 *) (dev->private))->dio_2 = 0;
e30ec011 DC	270
	271	printk("comedi%d: pcm3724: board=%s, 0x%03lx ", dev->minor,
	272	this_board->name, iobase);
	273	if (!iobase \|\| !request_region(iobase, iorange, "pcm3724")) {
	274	printk("I/O port conflict\n");
	275	return -EIO;
	276	}
	277
	278	dev->iobase = iobase;
	279	dev->board_name = this_board->name;
	280	printk("\n");
	281
	282	n_subdevices = this_board->numofports;
	283
c3744138 BP	284	ret = alloc_subdevices(dev, n_subdevices);
c3744138 BP	285	if (ret < 0)
e30ec011 DC	286	return ret;
	287
	288	for (i = 0; i < dev->n_subdevices; i++) {
	289	subdev_8255_init(dev, dev->subdevices + i, subdev_8255_cb,
	290	(unsigned long)(dev->iobase + SIZE_8255 * i));
	291	((dev->subdevices) + i)->insn_config = subdev_3724_insn_config;
	292	};
	293	return 0;
	294	}
	295
da91b269	296	static int pcm3724_detach(struct comedi_device *dev)
e30ec011 DC	297	{
	298	int i;
	299
	300	if (dev->subdevices) {
	301	for (i = 0; i < dev->n_subdevices; i++) {
	302	subdev_8255_cleanup(dev, dev->subdevices + i);
	303	}
	304	}
	305	if (dev->iobase) {
	306	release_region(dev->iobase, this_board->io_range);
	307	}
	308
	309	return 0;
	310	}