[GitHub/mt8127/android_kernel_alcatel_ttab.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),
};

static int __init driver_pcm3724_init_module(void)
{
	return comedi_driver_register(&driver_pcm3724);
}

static void __exit driver_pcm3724_cleanup_module(void)
{
	comedi_driver_unregister(&driver_pcm3724);
}

module_init(driver_pcm3724_init_module);
module_exit(driver_pcm3724_cleanup_module);

/* (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 = 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(KERN_INFO "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(KERN_INFO "\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;
}

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
0a85b6f0 MT	65	static int pcm3724_attach(struct comedi_device *dev,
0a85b6f0 MT	66	struct comedi_devconfig *it);
da91b269	67	static int pcm3724_detach(struct comedi_device *dev);
e30ec011	68
180089a8	69	struct pcm3724_board {
2696fb57 BP	70	const char name; / driver name */
	71	int dio; /* num of DIO */
	72	int numofports; /* num of 8255 subdevices */
	73	unsigned int IRQbits; /* allowed interrupts */
	74	unsigned int io_range; /* len of IO space */
180089a8	75	};
e30ec011	76
2696fb57	77	/* used to track configured dios */
8e7b864b	78	struct priv_pcm3724 {
e30ec011 DC	79	int dio_1;
e30ec011 DC	80	int dio_2;
8e7b864b BP	81	};
8e7b864b BP	82
180089a8	83	static const struct pcm3724_board boardtypes[] = {
e30ec011 DC	84	{"pcm3724", 48, 2, 0x00fc, PCM3724_SIZE,},
	85	};
	86
180089a8 BP	87	#define n_boardtypes (sizeof(boardtypes)/sizeof(struct pcm3724_board))
180089a8 BP	88	#define this_board ((const struct pcm3724_board *)dev->board_ptr)
e30ec011	89
139dfbdf	90	static struct comedi_driver driver_pcm3724 = {
68c3dbff BP	91	.driver_name = "pcm3724",
	92	.module = THIS_MODULE,
	93	.attach = pcm3724_attach,
	94	.detach = pcm3724_detach,
	95	.board_name = &boardtypes[0].name,
	96	.num_names = n_boardtypes,
	97	.offset = sizeof(struct pcm3724_board),
e30ec011 DC	98	};
e30ec011 DC	99
7114a280 AT	100	static int __init driver_pcm3724_init_module(void)
	101	{
	102	return comedi_driver_register(&driver_pcm3724);
	103	}
	104
	105	static void __exit driver_pcm3724_cleanup_module(void)
	106	{
	107	comedi_driver_unregister(&driver_pcm3724);
	108	}
	109
	110	module_init(driver_pcm3724_init_module);
	111	module_exit(driver_pcm3724_cleanup_module);
e30ec011	112
2696fb57	113	/* (setq c-basic-offset 8) */
e30ec011 DC	114
	115	static int subdev_8255_cb(int dir, int port, int data, unsigned long arg)
	116	{
	117	unsigned long iobase = arg;
	118	unsigned char inbres;
2696fb57	119	/* printk("8255cb %d %d %d %lx\n", dir,port,data,arg); */
e30ec011	120	if (dir) {
2696fb57	121	/* printk("8255 cb outb(%x, %lx)\n", data, iobase+port); */
e30ec011 DC	122	outb(data, iobase + port);
	123	return 0;
	124	} else {
	125	inbres = inb(iobase + port);
2696fb57	126	/* printk("8255 cb inb(%lx) = %x\n", iobase+port, inbres); */
e30ec011 DC	127	return inbres;
	128	}
	129	}
	130
da91b269	131	static int compute_buffer(int config, int devno, struct comedi_subdevice *s)
e30ec011 DC	132	{
	133	/* 1 in io_bits indicates output */
	134	if (s->io_bits & 0x0000ff) {
50ae2a52	135	if (devno == 0)
e30ec011	136	config \|= BUF_A0;
50ae2a52	137	else
e30ec011	138	config \|= BUF_A1;
e30ec011 DC	139	}
e30ec011 DC	140	if (s->io_bits & 0x00ff00) {
50ae2a52	141	if (devno == 0)
e30ec011	142	config \|= BUF_B0;
50ae2a52	143	else
e30ec011	144	config \|= BUF_B1;
e30ec011 DC	145	}
e30ec011 DC	146	if (s->io_bits & 0xff0000) {
50ae2a52	147	if (devno == 0)
e30ec011	148	config \|= BUF_C0;
50ae2a52	149	else
e30ec011	150	config \|= BUF_C1;
e30ec011 DC	151	}
	152	return config;
	153	}
	154
0a85b6f0 MT	155	static void do_3724_config(struct comedi_device *dev,
0a85b6f0 MT	156	struct comedi_subdevice *s, int chanspec)
e30ec011 DC	157	{
	158	int config;
	159	int buffer_config;
	160	unsigned long port_8255_cfg;
	161
	162	config = CR_CW;
	163	buffer_config = 0;
	164
	165	/* 1 in io_bits indicates output, 1 in config indicates input */
50ae2a52	166	if (!(s->io_bits & 0x0000ff))
e30ec011	167	config \|= CR_A_IO;
50ae2a52 BA	168
50ae2a52 BA	169	if (!(s->io_bits & 0x00ff00))
e30ec011	170	config \|= CR_B_IO;
50ae2a52 BA	171
50ae2a52 BA	172	if (!(s->io_bits & 0xff0000))
e30ec011	173	config \|= CR_C_IO;
e30ec011 DC	174
	175	buffer_config = compute_buffer(0, 0, dev->subdevices);
	176	buffer_config = compute_buffer(buffer_config, 1, (dev->subdevices) + 1);
	177
50ae2a52	178	if (s == dev->subdevices)
e30ec011	179	port_8255_cfg = dev->iobase + _8255_CR;
50ae2a52	180	else
e30ec011	181	port_8255_cfg = dev->iobase + SIZE_8255 + _8255_CR;
50ae2a52	182
e30ec011	183	outb(buffer_config, dev->iobase + 8); /* update buffer register */
50ae2a52 BA	184	/* printk("pcm3724 buffer_config (%lx) %d, %x\n",
	185	dev->iobase + _8255_CR, chanspec, buffer_config); */
	186
e30ec011 DC	187	outb(config, port_8255_cfg);
	188	}
	189
0a85b6f0 MT	190	static void enable_chan(struct comedi_device dev, struct comedi_subdevice s,
0a85b6f0 MT	191	int chanspec)
e30ec011 DC	192	{
	193	unsigned int mask;
	194	int gatecfg;
8e7b864b	195	struct priv_pcm3724 *priv;
e30ec011 DC	196
e30ec011 DC	197	gatecfg = 0;
440a6547	198	priv = dev->private;
e30ec011 DC	199
e30ec011 DC	200	mask = 1 << CR_CHAN(chanspec);
50ae2a52	201	if (s == dev->subdevices) /* subdev 0 */
e30ec011	202	priv->dio_1 \|= mask;
50ae2a52	203	else /* subdev 1 */
e30ec011	204	priv->dio_2 \|= mask;
50ae2a52 BA	205
50ae2a52 BA	206	if (priv->dio_1 & 0xff0000)
e30ec011	207	gatecfg \|= GATE_C0;
50ae2a52 BA	208
50ae2a52 BA	209	if (priv->dio_1 & 0xff00)
e30ec011	210	gatecfg \|= GATE_B0;
50ae2a52 BA	211
50ae2a52 BA	212	if (priv->dio_1 & 0xff)
e30ec011	213	gatecfg \|= GATE_A0;
50ae2a52 BA	214
50ae2a52 BA	215	if (priv->dio_2 & 0xff0000)
e30ec011	216	gatecfg \|= GATE_C1;
50ae2a52 BA	217
50ae2a52 BA	218	if (priv->dio_2 & 0xff00)
e30ec011	219	gatecfg \|= GATE_B1;
50ae2a52 BA	220
50ae2a52 BA	221	if (priv->dio_2 & 0xff)
e30ec011	222	gatecfg \|= GATE_A1;
50ae2a52	223
2696fb57	224	/* printk("gate control %x\n", gatecfg); */
e30ec011 DC	225	outb(gatecfg, dev->iobase + 9);
	226	}
	227
	228	/* overriding the 8255 insn config */
0a85b6f0 MT	229	static int subdev_3724_insn_config(struct comedi_device *dev,
	230	struct comedi_subdevice *s,
	231	struct comedi_insn insn, unsigned int data)
e30ec011 DC	232	{
	233	unsigned int mask;
	234	unsigned int bits;
	235
	236	mask = 1 << CR_CHAN(insn->chanspec);
50ae2a52	237	if (mask & 0x0000ff)
e30ec011	238	bits = 0x0000ff;
50ae2a52	239	else if (mask & 0x00ff00)
e30ec011	240	bits = 0x00ff00;
50ae2a52	241	else if (mask & 0x0f0000)
e30ec011	242	bits = 0x0f0000;
50ae2a52	243	else
e30ec011	244	bits = 0xf00000;
e30ec011 DC	245
	246	switch (data[0]) {
	247	case INSN_CONFIG_DIO_INPUT:
	248	s->io_bits &= ~bits;
	249	break;
	250	case INSN_CONFIG_DIO_OUTPUT:
	251	s->io_bits \|= bits;
	252	break;
	253	case INSN_CONFIG_DIO_QUERY:
	254	data[1] = (s->io_bits & bits) ? COMEDI_OUTPUT : COMEDI_INPUT;
	255	return insn->n;
	256	break;
	257	default:
	258	return -EINVAL;
	259	}
	260
	261	do_3724_config(dev, s, insn->chanspec);
	262	enable_chan(dev, s, insn->chanspec);
	263	return 1;
	264	}
	265
0a85b6f0 MT	266	static int pcm3724_attach(struct comedi_device *dev,
0a85b6f0 MT	267	struct comedi_devconfig *it)
e30ec011 DC	268	{
	269	unsigned long iobase;
	270	unsigned int iorange;
	271	int ret, i, n_subdevices;
	272
	273	iobase = it->options[0];
	274	iorange = this_board->io_range;
c3744138 BP	275
	276	ret = alloc_private(dev, sizeof(struct priv_pcm3724));
	277	if (ret < 0)
e30ec011 DC	278	return -ENOMEM;
e30ec011 DC	279
0a85b6f0 MT	280	((struct priv_pcm3724 *)(dev->private))->dio_1 = 0;
0a85b6f0 MT	281	((struct priv_pcm3724 *)(dev->private))->dio_2 = 0;
e30ec011	282
50ae2a52	283	printk(KERN_INFO "comedi%d: pcm3724: board=%s, 0x%03lx ", dev->minor,
0a85b6f0	284	this_board->name, iobase);
e30ec011 DC	285	if (!iobase \|\| !request_region(iobase, iorange, "pcm3724")) {
	286	printk("I/O port conflict\n");
	287	return -EIO;
	288	}
	289
	290	dev->iobase = iobase;
	291	dev->board_name = this_board->name;
50ae2a52	292	printk(KERN_INFO "\n");
e30ec011 DC	293
	294	n_subdevices = this_board->numofports;
	295
c3744138 BP	296	ret = alloc_subdevices(dev, n_subdevices);
c3744138 BP	297	if (ret < 0)
e30ec011 DC	298	return ret;
	299
	300	for (i = 0; i < dev->n_subdevices; i++) {
	301	subdev_8255_init(dev, dev->subdevices + i, subdev_8255_cb,
0a85b6f0	302	(unsigned long)(dev->iobase + SIZE_8255 * i));
e30ec011 DC	303	((dev->subdevices) + i)->insn_config = subdev_3724_insn_config;
	304	};
	305	return 0;
	306	}
	307
da91b269	308	static int pcm3724_detach(struct comedi_device *dev)
e30ec011 DC	309	{
	310	int i;
	311
	312	if (dev->subdevices) {
50ae2a52	313	for (i = 0; i < dev->n_subdevices; i++)
e30ec011	314	subdev_8255_cleanup(dev, dev->subdevices + i);
e30ec011	315	}
50ae2a52	316	if (dev->iobase)
e30ec011	317	release_region(dev->iobase, this_board->io_range);
e30ec011 DC	318
	319	return 0;
	320	}
90f703d3 AT	321
	322	MODULE_AUTHOR("Comedi http://www.comedi.org");
	323	MODULE_DESCRIPTION("Comedi low-level driver");
	324	MODULE_LICENSE("GPL");