/*
    comedi/drivers/ni_mio_cs.c
    Hardware driver for NI PCMCIA MIO E series cards

    COMEDI - Linux Control and Measurement Device Interface
    Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org>

    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.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/
/*
Driver: ni_mio_cs
Description: National Instruments DAQCard E series
Author: ds
Status: works
Devices: [National Instruments] DAQCard-AI-16XE-50 (ni_mio_cs),
  DAQCard-AI-16E-4, DAQCard-6062E, DAQCard-6024E, DAQCard-6036E
Updated: Thu Oct 23 19:43:17 CDT 2003

See the notes in the ni_atmio.o driver.
*/
/*
	The real guts of the driver is in ni_mio_common.c, which is
	included by all the E series drivers.

	References for specifications:

	   341080a.pdf  DAQCard E Series Register Level Programmer Manual

*/

#include "../comedidev.h"

#include <linux/delay.h>

#include "ni_stc.h"
#include "8255.h"

#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/ds.h>

#undef DEBUG

#define ATMIO 1
#undef PCIMIO

/*
 *  AT specific setup
 */

#define NI_SIZE 0x20

#define MAX_N_CALDACS 32

static const struct ni_board_struct ni_boards[] = {
	{.device_id = 0x010d,
	 .name = "DAQCard-ai-16xe-50",
	 .n_adchan = 16,
	 .adbits = 16,
	 .ai_fifo_depth = 1024,
	 .alwaysdither = 0,
	 .gainlkup = ai_gain_8,
	 .ai_speed = 5000,
	 .n_aochan = 0,
	 .aobits = 0,
	 .ao_fifo_depth = 0,
	 .ao_unipolar = 0,
	 .num_p0_dio_channels = 8,
	 .has_8255 = 0,
	 .caldac = {dac8800, dac8043},
	 },
	{.device_id = 0x010c,
	 .name = "DAQCard-ai-16e-4",
	 .n_adchan = 16,
	 .adbits = 12,
	 .ai_fifo_depth = 1024,
	 .alwaysdither = 0,
	 .gainlkup = ai_gain_16,
	 .ai_speed = 4000,
	 .n_aochan = 0,
	 .aobits = 0,
	 .ao_fifo_depth = 0,
	 .ao_unipolar = 0,
	 .num_p0_dio_channels = 8,
	 .has_8255 = 0,
	 .caldac = {mb88341},	/* verified */
	 },
	{.device_id = 0x02c4,
	 .name = "DAQCard-6062E",
	 .n_adchan = 16,
	 .adbits = 12,
	 .ai_fifo_depth = 8192,
	 .alwaysdither = 0,
	 .gainlkup = ai_gain_16,
	 .ai_speed = 2000,
	 .n_aochan = 2,
	 .aobits = 12,
	 .ao_fifo_depth = 2048,
	 .ao_range_table = &range_bipolar10,
	 .ao_unipolar = 0,
	 .ao_speed = 1176,
	 .num_p0_dio_channels = 8,
	 .has_8255 = 0,
	 .caldac = {ad8804_debug},	/* verified */
	 },
	{.device_id = 0x075e,
	 .name = "DAQCard-6024E",	/* specs incorrect! */
	 .n_adchan = 16,
	 .adbits = 12,
	 .ai_fifo_depth = 1024,
	 .alwaysdither = 0,
	 .gainlkup = ai_gain_4,
	 .ai_speed = 5000,
	 .n_aochan = 2,
	 .aobits = 12,
	 .ao_fifo_depth = 0,
	 .ao_range_table = &range_bipolar10,
	 .ao_unipolar = 0,
	 .ao_speed = 1000000,
	 .num_p0_dio_channels = 8,
	 .has_8255 = 0,
	 .caldac = {ad8804_debug},
	 },
	{.device_id = 0x0245,
	 .name = "DAQCard-6036E",	/* specs incorrect! */
	 .n_adchan = 16,
	 .adbits = 16,
	 .ai_fifo_depth = 1024,
	 .alwaysdither = 1,
	 .gainlkup = ai_gain_4,
	 .ai_speed = 5000,
	 .n_aochan = 2,
	 .aobits = 16,
	 .ao_fifo_depth = 0,
	 .ao_range_table = &range_bipolar10,
	 .ao_unipolar = 0,
	 .ao_speed = 1000000,
	 .num_p0_dio_channels = 8,
	 .has_8255 = 0,
	 .caldac = {ad8804_debug},
	 },
#if 0
	{.device_id = 0x0000,	/* unknown */
	 .name = "DAQCard-6715",
	 .n_adchan = 0,
	 .n_aochan = 8,
	 .aobits = 12,
	 .ao_671x = 8192,
	 .num_p0_dio_channels = 8,
	 .caldac = {mb88341, mb88341},
	 },
#endif
	/* N.B. Update ni_mio_cs_ids[] when entries added above. */
};

#define interrupt_pin(a)	0

#define IRQ_POLARITY 1

#define NI_E_IRQ_FLAGS		IRQF_SHARED

struct ni_private {

	struct pcmcia_device *link;

 NI_PRIVATE_COMMON};

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

/* How we access registers */

#define ni_writel(a, b)		(outl((a), (b)+dev->iobase))
#define ni_readl(a)		(inl((a)+dev->iobase))
#define ni_writew(a, b)		(outw((a), (b)+dev->iobase))
#define ni_readw(a)		(inw((a)+dev->iobase))
#define ni_writeb(a, b)		(outb((a), (b)+dev->iobase))
#define ni_readb(a)		(inb((a)+dev->iobase))

/* How we access windowed registers */

/* We automatically take advantage of STC registers that can be
 * read/written directly in the I/O space of the board.  The
 * DAQCard devices map the low 8 STC registers to iobase+addr*2. */

static void mio_cs_win_out(struct comedi_device *dev, uint16_t data, int addr)
{
	unsigned long flags;

	spin_lock_irqsave(&devpriv->window_lock, flags);
	if (addr < 8) {
		ni_writew(data, addr * 2);
	} else {
		ni_writew(addr, Window_Address);
		ni_writew(data, Window_Data);
	}
	spin_unlock_irqrestore(&devpriv->window_lock, flags);
}

static uint16_t mio_cs_win_in(struct comedi_device *dev, int addr)
{
	unsigned long flags;
	uint16_t ret;

	spin_lock_irqsave(&devpriv->window_lock, flags);
	if (addr < 8) {
		ret = ni_readw(addr * 2);
	} else {
		ni_writew(addr, Window_Address);
		ret = ni_readw(Window_Data);
	}
	spin_unlock_irqrestore(&devpriv->window_lock, flags);

	return ret;
}

static int mio_cs_attach(struct comedi_device *dev,
			 struct comedi_devconfig *it);
static int mio_cs_detach(struct comedi_device *dev);
static struct comedi_driver driver_ni_mio_cs = {
	.driver_name = "ni_mio_cs",
	.module = THIS_MODULE,
	.attach = mio_cs_attach,
	.detach = mio_cs_detach,
};

#include "ni_mio_common.c"

static int ni_getboardtype(struct comedi_device *dev,
			   struct pcmcia_device *link);

/* clean up allocated resources */
/* called when driver is removed */
static int mio_cs_detach(struct comedi_device *dev)
{
	mio_common_detach(dev);

	/* PCMCIA layer frees the IO region */

	if (dev->irq)
		free_irq(dev->irq, dev);

	return 0;
}

static void mio_cs_config(struct pcmcia_device *link);
static void cs_release(struct pcmcia_device *link);
static void cs_detach(struct pcmcia_device *);

static struct pcmcia_device *cur_dev = NULL;
static const dev_info_t dev_info = "ni_mio_cs";

static int cs_attach(struct pcmcia_device *link)
{
	link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
	link->io.NumPorts1 = 16;
	link->conf.Attributes = CONF_ENABLE_IRQ;
	link->conf.IntType = INT_MEMORY_AND_IO;

	cur_dev = link;

	mio_cs_config(link);

	return 0;
}

static void cs_release(struct pcmcia_device *link)
{
	pcmcia_disable_device(link);
}

static void cs_detach(struct pcmcia_device *link)
{
	DPRINTK("cs_detach(link=%p)\n", link);

	cs_release(link);
}

static int mio_cs_suspend(struct pcmcia_device *link)
{
	DPRINTK("pm suspend\n");

	return 0;
}

static int mio_cs_resume(struct pcmcia_device *link)
{
	DPRINTK("pm resume\n");
	return 0;
}


static int mio_pcmcia_config_loop(struct pcmcia_device *p_dev,
				cistpl_cftable_entry_t *cfg,
				cistpl_cftable_entry_t *dflt,
				unsigned int vcc,
				void *priv_data)
{
	int base, ret;

	p_dev->io.NumPorts1 = cfg->io.win[0].len;
	p_dev->io.IOAddrLines = cfg->io.flags & CISTPL_IO_LINES_MASK;
	p_dev->io.NumPorts2 = 0;

	for (base = 0x000; base < 0x400; base += 0x20) {
		p_dev->io.BasePort1 = base;
		ret = pcmcia_request_io(p_dev, &p_dev->io);
		if (!ret)
			return 0;
	}
	return -ENODEV;
}


static void mio_cs_config(struct pcmcia_device *link)
{
	int ret;

	DPRINTK("mio_cs_config(link=%p)\n", link);

	ret = pcmcia_loop_config(link, mio_pcmcia_config_loop, NULL);
	if (ret) {
		dev_warn(&link->dev, "no configuration found\n");
		return;
	}

	if (!link->irq)
		dev_info(&link->dev, "no IRQ available\n");

	ret = pcmcia_request_configuration(link, &link->conf);
}

static int mio_cs_attach(struct comedi_device *dev, struct comedi_devconfig *it)
{
	struct pcmcia_device *link;
	unsigned int irq;
	int ret;

	DPRINTK("mio_cs_attach(dev=%p,it=%p)\n", dev, it);

	link = cur_dev;		/* XXX hack */
	if (!link)
		return -EIO;

	dev->driver = &driver_ni_mio_cs;
	dev->iobase = link->io.BasePort1;

	irq = link->irq;

	printk("comedi%d: %s: DAQCard: io 0x%04lx, irq %u, ",
	       dev->minor, dev->driver->driver_name, dev->iobase, irq);

#if 0
	{
		int i;

		printk(" board fingerprint:");
		for (i = 0; i < 32; i += 2) {
			printk(" %04x %02x", inw(dev->iobase + i),
			       inb(dev->iobase + i + 1));
		}
		printk("\n");
		printk(" board fingerprint (windowed):");
		for (i = 0; i < 10; i++)
			printk(" 0x%04x", win_in(i));
		printk("\n");
	}
#endif

	dev->board_ptr = ni_boards + ni_getboardtype(dev, link);

	printk(" %s", boardtype.name);
	dev->board_name = boardtype.name;

	ret = request_irq(irq, ni_E_interrupt, NI_E_IRQ_FLAGS,
			  "ni_mio_cs", dev);
	if (ret < 0) {
		printk(" irq not available\n");
		return -EINVAL;
	}
	dev->irq = irq;

	/* allocate private area */
	ret = ni_alloc_private(dev);
	if (ret < 0)
		return ret;

	devpriv->stc_writew = &mio_cs_win_out;
	devpriv->stc_readw = &mio_cs_win_in;
	devpriv->stc_writel = &win_out2;
	devpriv->stc_readl = &win_in2;

	ret = ni_E_init(dev, it);

	if (ret < 0)
		return ret;

	return 0;
}

static int ni_getboardtype(struct comedi_device *dev,
			   struct pcmcia_device *link)
{
	int i;

	for (i = 0; i < n_ni_boards; i++) {
		if (ni_boards[i].device_id == link->card_id)
			return i;
	}

	printk("unknown board 0x%04x -- pretend it is a ", link->card_id);

	return 0;
}

#ifdef MODULE

static struct pcmcia_device_id ni_mio_cs_ids[] = {
	PCMCIA_DEVICE_MANF_CARD(0x010b, 0x010d),	/* DAQCard-ai-16xe-50 */
	PCMCIA_DEVICE_MANF_CARD(0x010b, 0x010c),	/* DAQCard-ai-16e-4 */
	PCMCIA_DEVICE_MANF_CARD(0x010b, 0x02c4),	/* DAQCard-6062E */
	PCMCIA_DEVICE_MANF_CARD(0x010b, 0x075e),	/* DAQCard-6024E */
	PCMCIA_DEVICE_MANF_CARD(0x010b, 0x0245),	/* DAQCard-6036E */
	PCMCIA_DEVICE_NULL
};

MODULE_DEVICE_TABLE(pcmcia, ni_mio_cs_ids);
MODULE_AUTHOR("David A. Schleef <ds@schleef.org>");
MODULE_DESCRIPTION("Comedi driver for National Instruments DAQCard E series");
MODULE_LICENSE("GPL");

struct pcmcia_driver ni_mio_cs_driver = {
	.probe = &cs_attach,
	.remove = &cs_detach,
	.suspend = &mio_cs_suspend,
	.resume = &mio_cs_resume,
	.id_table = ni_mio_cs_ids,
	.owner = THIS_MODULE,
	.drv = {
		.name = dev_info,
		},
};

int init_module(void)
{
	pcmcia_register_driver(&ni_mio_cs_driver);
	comedi_driver_register(&driver_ni_mio_cs);
	return 0;
}

void cleanup_module(void)
{
	pcmcia_unregister_driver(&ni_mio_cs_driver);
#if 0
	while (cur_dev != NULL)
		cs_detach(cur_dev->handle);
#endif
	comedi_driver_unregister(&driver_ni_mio_cs);
}
#endif