[linux-block.git] / drivers / staging / comedi / drivers / fl512.c

/*
    comedi/drivers/fl512.c
    Anders Gnistrup <ex18@kalman.iau.dtu.dk>
*/

/*
Driver: fl512
Description: unknown
Author: Anders Gnistrup <ex18@kalman.iau.dtu.dk>
Devices: [unknown] FL512 (fl512)
Status: unknown

Digital I/O is not supported.

Configuration options:
  [0] - I/O port base address
*/

#define DEBUG 0

#include "../comedidev.h"

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

#define FL512_SIZE 16		/* the size of the used memory */
struct fl512_private {

	short ao_readback[2];
};

#define devpriv ((struct fl512_private *) dev->private)

static const struct comedi_lrange range_fl512 = { 4, {
			BIP_RANGE(0.5),
			BIP_RANGE(1),
			BIP_RANGE(5),
			BIP_RANGE(10),
			UNI_RANGE(1),
			UNI_RANGE(5),
			UNI_RANGE(10),
	}
};

static int fl512_attach(struct comedi_device *dev, struct comedi_devconfig *it);
static int fl512_detach(struct comedi_device *dev);

static struct comedi_driver driver_fl512 = {
	.driver_name = "fl512",
	.module = THIS_MODULE,
	.attach = fl512_attach,
	.detach = fl512_detach,
};

COMEDI_INITCLEANUP(driver_fl512);

static int fl512_ai_insn(struct comedi_device *dev,
	struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data);
static int fl512_ao_insn(struct comedi_device *dev,
	struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data);
static int fl512_ao_insn_readback(struct comedi_device *dev,
	struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data);

/*
 * fl512_ai_insn : this is the analog input function
 */
static int fl512_ai_insn(struct comedi_device *dev,
	struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data)
{
	int n;
	unsigned int lo_byte, hi_byte;
	char chan = CR_CHAN(insn->chanspec);
	unsigned long iobase = dev->iobase;

	for (n = 0; n < insn->n; n++) {	/* sample n times on selected channel */
		/* XXX probably can move next step out of for() loop -- will make
		 * AI a little bit faster. */
		outb(chan, iobase + 2);	/* select chan */
		outb(0, iobase + 3);	/* start conversion */
		/* XXX should test "done" flag instead of delay */
		udelay(30);	/* sleep 30 usec */
		lo_byte = inb(iobase + 2);	/* low 8 byte */
		hi_byte = inb(iobase + 3) & 0xf;	/* high 4 bit and mask */
		data[n] = lo_byte + (hi_byte << 8);
	}
	return n;
}

/*
 * fl512_ao_insn : used to write to a DA port n times
 */
static int fl512_ao_insn(struct comedi_device *dev,
	struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data)
{
	int n;
	int chan = CR_CHAN(insn->chanspec);	/* get chan to write */
	unsigned long iobase = dev->iobase;	/* get base address  */

	for (n = 0; n < insn->n; n++) {	/* write n data set */
		outb(data[n] & 0x0ff, iobase + 4 + 2 * chan);	/* write low byte   */
		outb((data[n] & 0xf00) >> 8, iobase + 4 + 2 * chan);	/* write high byte  */
		inb(iobase + 4 + 2 * chan);	/* trig */

		devpriv->ao_readback[chan] = data[n];
	}
	return n;
}

/*
 * fl512_ao_insn_readback : used to read previous values written to
 * DA port
 */
static int fl512_ao_insn_readback(struct comedi_device *dev,
	struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data)
{
	int n;
	int chan = CR_CHAN(insn->chanspec);

	for (n = 0; n < insn->n; n++) {
		data[n] = devpriv->ao_readback[chan];
	}

	return n;
}

/*
 * start attach
 */
static int fl512_attach(struct comedi_device *dev, struct comedi_devconfig *it)
{
	unsigned long iobase;
	struct comedi_subdevice *s;	/* pointer to the subdevice:
				   Analog in, Analog out, ( not made ->and Digital IO) */

	iobase = it->options[0];
	printk("comedi:%d fl512: 0x%04lx", dev->minor, iobase);
	if (!request_region(iobase, FL512_SIZE, "fl512")) {
		printk(" I/O port conflict\n");
		return -EIO;
	}
	dev->iobase = iobase;
	dev->board_name = "fl512";
	if (alloc_private(dev, sizeof(struct fl512_private)) < 0)
		return -ENOMEM;

#if DEBUG
	printk("malloc ok\n");
#endif

	if (alloc_subdevices(dev, 2) < 0)
		return -ENOMEM;

	/*
	 * this if the definitions of the supdevices, 2 have been defined
	 */
	/* Analog indput */
	s = dev->subdevices + 0;
	s->type = COMEDI_SUBD_AI;	/* define subdevice as Analog In   */
	s->subdev_flags = SDF_READABLE | SDF_GROUND;	/* you can read it from userspace  */
	s->n_chan = 16;		/* Number of Analog input channels */
	s->maxdata = 0x0fff;	/* accept only 12 bits of data     */
	s->range_table = &range_fl512;	/* device use one of the ranges    */
	s->insn_read = fl512_ai_insn;	/* function to call when read AD   */
	printk("comedi: fl512: subdevice 0 initialized\n");

	/* Analog output */
	s = dev->subdevices + 1;
	s->type = COMEDI_SUBD_AO;	/* define subdevice as Analog OUT   */
	s->subdev_flags = SDF_WRITABLE;	/* you can write it from userspace  */
	s->n_chan = 2;		/* Number of Analog output channels */
	s->maxdata = 0x0fff;	/* accept only 12 bits of data      */
	s->range_table = &range_fl512;	/* device use one of the ranges     */
	s->insn_write = fl512_ao_insn;	/* function to call when write DA   */
	s->insn_read = fl512_ao_insn_readback;	/* function to call when reading DA   */
	printk("comedi: fl512: subdevice 1 initialized\n");

	return 1;
}

static int fl512_detach(struct comedi_device *dev)
{
	if (dev->iobase)
		release_region(dev->iobase, FL512_SIZE);
	printk("comedi%d: fl512: dummy i detach\n", dev->minor);
	return 0;
}
Commit	Line	Data
9e27db79 AG	1	/*
	2	comedi/drivers/fl512.c
	3	Anders Gnistrup <ex18@kalman.iau.dtu.dk>
	4	*/
	5
	6	/*
	7	Driver: fl512
	8	Description: unknown
	9	Author: Anders Gnistrup <ex18@kalman.iau.dtu.dk>
	10	Devices: [unknown] FL512 (fl512)
	11	Status: unknown
	12
	13	Digital I/O is not supported.
	14
	15	Configuration options:
	16	[0] - I/O port base address
	17	*/
	18
	19	#define DEBUG 0
	20
	21	#include "../comedidev.h"
	22
	23	#include <linux/delay.h>
	24	#include <linux/ioport.h>
	25
	26	#define FL512_SIZE 16 /* the size of the used memory */
fa11f7a9 BP	27	struct fl512_private {
fa11f7a9 BP	28
790c5541	29	short ao_readback[2];
fa11f7a9 BP	30	};
	31
	32	#define devpriv ((struct fl512_private *) dev->private)
9e27db79	33
9ced1de6	34	static const struct comedi_lrange range_fl512 = { 4, {
9e27db79 AG	35	BIP_RANGE(0.5),
	36	BIP_RANGE(1),
	37	BIP_RANGE(5),
	38	BIP_RANGE(10),
	39	UNI_RANGE(1),
	40	UNI_RANGE(5),
	41	UNI_RANGE(10),
	42	}
	43	};
	44
da91b269 BP	45	static int fl512_attach(struct comedi_device dev, struct comedi_devconfig it);
da91b269 BP	46	static int fl512_detach(struct comedi_device *dev);
9e27db79	47
139dfbdf	48	static struct comedi_driver driver_fl512 = {
68c3dbff BP	49	.driver_name = "fl512",
	50	.module = THIS_MODULE,
	51	.attach = fl512_attach,
	52	.detach = fl512_detach,
9e27db79 AG	53	};
	54
	55	COMEDI_INITCLEANUP(driver_fl512);
	56
da91b269 BP	57	static int fl512_ai_insn(struct comedi_device *dev,
	58	struct comedi_subdevice s, struct comedi_insn insn, unsigned int *data);
	59	static int fl512_ao_insn(struct comedi_device *dev,
	60	struct comedi_subdevice s, struct comedi_insn insn, unsigned int *data);
	61	static int fl512_ao_insn_readback(struct comedi_device *dev,
	62	struct comedi_subdevice s, struct comedi_insn insn, unsigned int *data);
9e27db79 AG	63
	64	/*
	65	* fl512_ai_insn : this is the analog input function
	66	*/
da91b269 BP	67	static int fl512_ai_insn(struct comedi_device *dev,
da91b269 BP	68	struct comedi_subdevice s, struct comedi_insn insn, unsigned int *data)
9e27db79 AG	69	{
	70	int n;
	71	unsigned int lo_byte, hi_byte;
	72	char chan = CR_CHAN(insn->chanspec);
	73	unsigned long iobase = dev->iobase;
	74
	75	for (n = 0; n < insn->n; n++) { /* sample n times on selected channel */
	76	/* XXX probably can move next step out of for() loop -- will make
	77	* AI a little bit faster. */
	78	outb(chan, iobase + 2); /* select chan */
	79	outb(0, iobase + 3); /* start conversion */
	80	/* XXX should test "done" flag instead of delay */
5f74ea14	81	udelay(30); /* sleep 30 usec */
9e27db79 AG	82	lo_byte = inb(iobase + 2); /* low 8 byte */
	83	hi_byte = inb(iobase + 3) & 0xf; /* high 4 bit and mask */
	84	data[n] = lo_byte + (hi_byte << 8);
	85	}
	86	return n;
	87	}
	88
	89	/*
	90	* fl512_ao_insn : used to write to a DA port n times
	91	*/
da91b269 BP	92	static int fl512_ao_insn(struct comedi_device *dev,
da91b269 BP	93	struct comedi_subdevice s, struct comedi_insn insn, unsigned int *data)
9e27db79 AG	94	{
	95	int n;
	96	int chan = CR_CHAN(insn->chanspec); /* get chan to write */
	97	unsigned long iobase = dev->iobase; /* get base address */
	98
	99	for (n = 0; n < insn->n; n++) { /* write n data set */
	100	outb(data[n] & 0x0ff, iobase + 4 + 2 * chan); /* write low byte */
	101	outb((data[n] & 0xf00) >> 8, iobase + 4 + 2 * chan); /* write high byte */
	102	inb(iobase + 4 + 2 * chan); /* trig */
	103
	104	devpriv->ao_readback[chan] = data[n];
	105	}
	106	return n;
	107	}
	108
	109	/*
	110	* fl512_ao_insn_readback : used to read previous values written to
	111	* DA port
	112	*/
da91b269 BP	113	static int fl512_ao_insn_readback(struct comedi_device *dev,
da91b269 BP	114	struct comedi_subdevice s, struct comedi_insn insn, unsigned int *data)
9e27db79 AG	115	{
	116	int n;
	117	int chan = CR_CHAN(insn->chanspec);
	118
	119	for (n = 0; n < insn->n; n++) {
	120	data[n] = devpriv->ao_readback[chan];
	121	}
	122
	123	return n;
	124	}
	125
	126	/*
	127	* start attach
	128	*/
da91b269	129	static int fl512_attach(struct comedi_device dev, struct comedi_devconfig it)
9e27db79 AG	130	{
9e27db79 AG	131	unsigned long iobase;
34c43922	132	struct comedi_subdevice s; / pointer to the subdevice:
9e27db79 AG	133	Analog in, Analog out, ( not made ->and Digital IO) */
	134
	135	iobase = it->options[0];
	136	printk("comedi:%d fl512: 0x%04lx", dev->minor, iobase);
	137	if (!request_region(iobase, FL512_SIZE, "fl512")) {
	138	printk(" I/O port conflict\n");
	139	return -EIO;
	140	}
	141	dev->iobase = iobase;
	142	dev->board_name = "fl512";
fa11f7a9	143	if (alloc_private(dev, sizeof(struct fl512_private)) < 0)
9e27db79 AG	144	return -ENOMEM;
	145
	146	#if DEBUG
	147	printk("malloc ok\n");
	148	#endif
	149
	150	if (alloc_subdevices(dev, 2) < 0)
	151	return -ENOMEM;
	152
	153	/*
	154	* this if the definitions of the supdevices, 2 have been defined
	155	*/
	156	/* Analog indput */
	157	s = dev->subdevices + 0;
	158	s->type = COMEDI_SUBD_AI; /* define subdevice as Analog In */
	159	s->subdev_flags = SDF_READABLE \| SDF_GROUND; /* you can read it from userspace */
	160	s->n_chan = 16; /* Number of Analog input channels */
	161	s->maxdata = 0x0fff; /* accept only 12 bits of data */
	162	s->range_table = &range_fl512; /* device use one of the ranges */
	163	s->insn_read = fl512_ai_insn; /* function to call when read AD */
	164	printk("comedi: fl512: subdevice 0 initialized\n");
	165
	166	/* Analog output */
	167	s = dev->subdevices + 1;
	168	s->type = COMEDI_SUBD_AO; /* define subdevice as Analog OUT */
	169	s->subdev_flags = SDF_WRITABLE; /* you can write it from userspace */
	170	s->n_chan = 2; /* Number of Analog output channels */
	171	s->maxdata = 0x0fff; /* accept only 12 bits of data */
	172	s->range_table = &range_fl512; /* device use one of the ranges */
	173	s->insn_write = fl512_ao_insn; /* function to call when write DA */
	174	s->insn_read = fl512_ao_insn_readback; /* function to call when reading DA */
	175	printk("comedi: fl512: subdevice 1 initialized\n");
	176
	177	return 1;
	178	}
	179
da91b269	180	static int fl512_detach(struct comedi_device *dev)
9e27db79 AG	181	{
	182	if (dev->iobase)
	183	release_region(dev->iobase, FL512_SIZE);
	184	printk("comedi%d: fl512: dummy i detach\n", dev->minor);
	185	return 0;
	186	}